![Linus Torvalds](/assets/img/avatar_default.png)
Pull vfs updates from Al Viro: "All kinds of stuff this time around; some more notable parts: - RCU'd vfsmounts handling - new primitives for coredump handling - files_lock is gone - Bruce's delegations handling series - exportfs fixes plus misc stuff all over the place" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits) ecryptfs: ->f_op is never NULL locks: break delegations on any attribute modification locks: break delegations on link locks: break delegations on rename locks: helper functions for delegation breaking locks: break delegations on unlink namei: minor vfs_unlink cleanup locks: implement delegations locks: introduce new FL_DELEG lock flag vfs: take i_mutex on renamed file vfs: rename I_MUTEX_QUOTA now that it's not used for quotas vfs: don't use PARENT/CHILD lock classes for non-directories vfs: pull ext4's double-i_mutex-locking into common code exportfs: fix quadratic behavior in filehandle lookup exportfs: better variable name exportfs: move most of reconnect_path to helper function exportfs: eliminate unused "noprogress" counter exportfs: stop retrying once we race with rename/remove exportfs: clear DISCONNECTED on all parents sooner exportfs: more detailed comment for path_reconnect ...
8428 lines
226 KiB
C
8428 lines
226 KiB
C
/*
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* fs/nfs/nfs4proc.c
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*
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* Client-side procedure declarations for NFSv4.
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*
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* Copyright (c) 2002 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Kendrick Smith <kmsmith@umich.edu>
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/ratelimit.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/nfs.h>
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#include <linux/nfs4.h>
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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#include <linux/nfs_mount.h>
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#include <linux/namei.h>
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#include <linux/mount.h>
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#include <linux/module.h>
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#include <linux/nfs_idmap.h>
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#include <linux/xattr.h>
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#include <linux/utsname.h>
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#include <linux/freezer.h>
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#include "nfs4_fs.h"
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#include "delegation.h"
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#include "internal.h"
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#include "iostat.h"
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#include "callback.h"
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#include "pnfs.h"
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#include "netns.h"
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#include "nfs4session.h"
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#include "fscache.h"
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#include "nfs4trace.h"
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#define NFSDBG_FACILITY NFSDBG_PROC
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#define NFS4_POLL_RETRY_MIN (HZ/10)
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#define NFS4_POLL_RETRY_MAX (15*HZ)
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struct nfs4_opendata;
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static int _nfs4_proc_open(struct nfs4_opendata *data);
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static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
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static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
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static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
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static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
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static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
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static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
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static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
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struct nfs_fattr *fattr, struct iattr *sattr,
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struct nfs4_state *state, struct nfs4_label *ilabel,
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struct nfs4_label *olabel);
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#ifdef CONFIG_NFS_V4_1
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static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
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struct rpc_cred *);
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static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
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struct rpc_cred *);
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#endif
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#ifdef CONFIG_NFS_V4_SECURITY_LABEL
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static inline struct nfs4_label *
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nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
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struct iattr *sattr, struct nfs4_label *label)
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{
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int err;
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if (label == NULL)
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return NULL;
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if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
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return NULL;
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err = security_dentry_init_security(dentry, sattr->ia_mode,
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&dentry->d_name, (void **)&label->label, &label->len);
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if (err == 0)
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return label;
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return NULL;
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}
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static inline void
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nfs4_label_release_security(struct nfs4_label *label)
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{
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if (label)
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security_release_secctx(label->label, label->len);
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}
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static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
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{
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if (label)
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return server->attr_bitmask;
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return server->attr_bitmask_nl;
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}
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#else
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static inline struct nfs4_label *
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nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
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struct iattr *sattr, struct nfs4_label *l)
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{ return NULL; }
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static inline void
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nfs4_label_release_security(struct nfs4_label *label)
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{ return; }
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static inline u32 *
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nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
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{ return server->attr_bitmask; }
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#endif
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/* Prevent leaks of NFSv4 errors into userland */
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static int nfs4_map_errors(int err)
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{
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if (err >= -1000)
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return err;
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switch (err) {
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case -NFS4ERR_RESOURCE:
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case -NFS4ERR_LAYOUTTRYLATER:
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case -NFS4ERR_RECALLCONFLICT:
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return -EREMOTEIO;
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case -NFS4ERR_WRONGSEC:
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case -NFS4ERR_WRONG_CRED:
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return -EPERM;
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case -NFS4ERR_BADOWNER:
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case -NFS4ERR_BADNAME:
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return -EINVAL;
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case -NFS4ERR_SHARE_DENIED:
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return -EACCES;
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case -NFS4ERR_MINOR_VERS_MISMATCH:
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return -EPROTONOSUPPORT;
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case -NFS4ERR_ACCESS:
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return -EACCES;
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case -NFS4ERR_FILE_OPEN:
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return -EBUSY;
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default:
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dprintk("%s could not handle NFSv4 error %d\n",
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__func__, -err);
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break;
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}
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return -EIO;
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}
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/*
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* This is our standard bitmap for GETATTR requests.
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*/
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const u32 nfs4_fattr_bitmap[3] = {
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FATTR4_WORD0_TYPE
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| FATTR4_WORD0_CHANGE
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| FATTR4_WORD0_SIZE
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| FATTR4_WORD0_FSID
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| FATTR4_WORD0_FILEID,
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FATTR4_WORD1_MODE
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| FATTR4_WORD1_NUMLINKS
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| FATTR4_WORD1_OWNER
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| FATTR4_WORD1_OWNER_GROUP
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| FATTR4_WORD1_RAWDEV
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| FATTR4_WORD1_SPACE_USED
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| FATTR4_WORD1_TIME_ACCESS
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| FATTR4_WORD1_TIME_METADATA
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| FATTR4_WORD1_TIME_MODIFY,
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#ifdef CONFIG_NFS_V4_SECURITY_LABEL
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FATTR4_WORD2_SECURITY_LABEL
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#endif
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};
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static const u32 nfs4_pnfs_open_bitmap[3] = {
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FATTR4_WORD0_TYPE
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| FATTR4_WORD0_CHANGE
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| FATTR4_WORD0_SIZE
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| FATTR4_WORD0_FSID
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| FATTR4_WORD0_FILEID,
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FATTR4_WORD1_MODE
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| FATTR4_WORD1_NUMLINKS
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| FATTR4_WORD1_OWNER
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| FATTR4_WORD1_OWNER_GROUP
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| FATTR4_WORD1_RAWDEV
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| FATTR4_WORD1_SPACE_USED
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| FATTR4_WORD1_TIME_ACCESS
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| FATTR4_WORD1_TIME_METADATA
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| FATTR4_WORD1_TIME_MODIFY,
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FATTR4_WORD2_MDSTHRESHOLD
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};
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static const u32 nfs4_open_noattr_bitmap[3] = {
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FATTR4_WORD0_TYPE
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| FATTR4_WORD0_CHANGE
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| FATTR4_WORD0_FILEID,
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};
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const u32 nfs4_statfs_bitmap[3] = {
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FATTR4_WORD0_FILES_AVAIL
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| FATTR4_WORD0_FILES_FREE
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| FATTR4_WORD0_FILES_TOTAL,
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FATTR4_WORD1_SPACE_AVAIL
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| FATTR4_WORD1_SPACE_FREE
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| FATTR4_WORD1_SPACE_TOTAL
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};
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const u32 nfs4_pathconf_bitmap[3] = {
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FATTR4_WORD0_MAXLINK
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| FATTR4_WORD0_MAXNAME,
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0
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};
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const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
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| FATTR4_WORD0_MAXREAD
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| FATTR4_WORD0_MAXWRITE
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| FATTR4_WORD0_LEASE_TIME,
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FATTR4_WORD1_TIME_DELTA
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| FATTR4_WORD1_FS_LAYOUT_TYPES,
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FATTR4_WORD2_LAYOUT_BLKSIZE
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};
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const u32 nfs4_fs_locations_bitmap[3] = {
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FATTR4_WORD0_TYPE
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| FATTR4_WORD0_CHANGE
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| FATTR4_WORD0_SIZE
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| FATTR4_WORD0_FSID
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| FATTR4_WORD0_FILEID
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| FATTR4_WORD0_FS_LOCATIONS,
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FATTR4_WORD1_MODE
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| FATTR4_WORD1_NUMLINKS
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| FATTR4_WORD1_OWNER
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| FATTR4_WORD1_OWNER_GROUP
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| FATTR4_WORD1_RAWDEV
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| FATTR4_WORD1_SPACE_USED
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| FATTR4_WORD1_TIME_ACCESS
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| FATTR4_WORD1_TIME_METADATA
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| FATTR4_WORD1_TIME_MODIFY
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| FATTR4_WORD1_MOUNTED_ON_FILEID,
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};
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static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
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struct nfs4_readdir_arg *readdir)
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{
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__be32 *start, *p;
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if (cookie > 2) {
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readdir->cookie = cookie;
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memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
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return;
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}
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readdir->cookie = 0;
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memset(&readdir->verifier, 0, sizeof(readdir->verifier));
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if (cookie == 2)
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return;
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/*
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* NFSv4 servers do not return entries for '.' and '..'
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* Therefore, we fake these entries here. We let '.'
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* have cookie 0 and '..' have cookie 1. Note that
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* when talking to the server, we always send cookie 0
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* instead of 1 or 2.
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*/
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start = p = kmap_atomic(*readdir->pages);
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if (cookie == 0) {
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*p++ = xdr_one; /* next */
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*p++ = xdr_zero; /* cookie, first word */
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*p++ = xdr_one; /* cookie, second word */
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*p++ = xdr_one; /* entry len */
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memcpy(p, ".\0\0\0", 4); /* entry */
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p++;
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*p++ = xdr_one; /* bitmap length */
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*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
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*p++ = htonl(8); /* attribute buffer length */
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p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
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}
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*p++ = xdr_one; /* next */
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*p++ = xdr_zero; /* cookie, first word */
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*p++ = xdr_two; /* cookie, second word */
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*p++ = xdr_two; /* entry len */
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memcpy(p, "..\0\0", 4); /* entry */
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p++;
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*p++ = xdr_one; /* bitmap length */
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*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
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*p++ = htonl(8); /* attribute buffer length */
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p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
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readdir->pgbase = (char *)p - (char *)start;
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readdir->count -= readdir->pgbase;
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kunmap_atomic(start);
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}
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static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
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{
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int res = 0;
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might_sleep();
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if (*timeout <= 0)
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*timeout = NFS4_POLL_RETRY_MIN;
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if (*timeout > NFS4_POLL_RETRY_MAX)
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*timeout = NFS4_POLL_RETRY_MAX;
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freezable_schedule_timeout_killable_unsafe(*timeout);
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if (fatal_signal_pending(current))
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res = -ERESTARTSYS;
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*timeout <<= 1;
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return res;
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}
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|
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/* This is the error handling routine for processes that are allowed
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* to sleep.
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*/
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static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
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{
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struct nfs_client *clp = server->nfs_client;
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struct nfs4_state *state = exception->state;
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struct inode *inode = exception->inode;
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int ret = errorcode;
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|
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exception->retry = 0;
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switch(errorcode) {
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case 0:
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return 0;
|
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case -NFS4ERR_OPENMODE:
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if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
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nfs4_inode_return_delegation(inode);
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exception->retry = 1;
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return 0;
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}
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if (state == NULL)
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break;
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ret = nfs4_schedule_stateid_recovery(server, state);
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if (ret < 0)
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break;
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goto wait_on_recovery;
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case -NFS4ERR_DELEG_REVOKED:
|
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case -NFS4ERR_ADMIN_REVOKED:
|
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case -NFS4ERR_BAD_STATEID:
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if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
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nfs_remove_bad_delegation(inode);
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exception->retry = 1;
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break;
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}
|
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if (state == NULL)
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break;
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ret = nfs4_schedule_stateid_recovery(server, state);
|
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if (ret < 0)
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break;
|
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goto wait_on_recovery;
|
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case -NFS4ERR_EXPIRED:
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if (state != NULL) {
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ret = nfs4_schedule_stateid_recovery(server, state);
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if (ret < 0)
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break;
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}
|
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case -NFS4ERR_STALE_STATEID:
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case -NFS4ERR_STALE_CLIENTID:
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nfs4_schedule_lease_recovery(clp);
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goto wait_on_recovery;
|
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case -NFS4ERR_MOVED:
|
|
ret = nfs4_schedule_migration_recovery(server);
|
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if (ret < 0)
|
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break;
|
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goto wait_on_recovery;
|
|
case -NFS4ERR_LEASE_MOVED:
|
|
nfs4_schedule_lease_moved_recovery(clp);
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goto wait_on_recovery;
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
case -NFS4ERR_BADSESSION:
|
|
case -NFS4ERR_BADSLOT:
|
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case -NFS4ERR_BAD_HIGH_SLOT:
|
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
|
|
case -NFS4ERR_DEADSESSION:
|
|
case -NFS4ERR_SEQ_FALSE_RETRY:
|
|
case -NFS4ERR_SEQ_MISORDERED:
|
|
dprintk("%s ERROR: %d Reset session\n", __func__,
|
|
errorcode);
|
|
nfs4_schedule_session_recovery(clp->cl_session, errorcode);
|
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goto wait_on_recovery;
|
|
#endif /* defined(CONFIG_NFS_V4_1) */
|
|
case -NFS4ERR_FILE_OPEN:
|
|
if (exception->timeout > HZ) {
|
|
/* We have retried a decent amount, time to
|
|
* fail
|
|
*/
|
|
ret = -EBUSY;
|
|
break;
|
|
}
|
|
case -NFS4ERR_GRACE:
|
|
case -NFS4ERR_DELAY:
|
|
ret = nfs4_delay(server->client, &exception->timeout);
|
|
if (ret != 0)
|
|
break;
|
|
case -NFS4ERR_RETRY_UNCACHED_REP:
|
|
case -NFS4ERR_OLD_STATEID:
|
|
exception->retry = 1;
|
|
break;
|
|
case -NFS4ERR_BADOWNER:
|
|
/* The following works around a Linux server bug! */
|
|
case -NFS4ERR_BADNAME:
|
|
if (server->caps & NFS_CAP_UIDGID_NOMAP) {
|
|
server->caps &= ~NFS_CAP_UIDGID_NOMAP;
|
|
exception->retry = 1;
|
|
printk(KERN_WARNING "NFS: v4 server %s "
|
|
"does not accept raw "
|
|
"uid/gids. "
|
|
"Reenabling the idmapper.\n",
|
|
server->nfs_client->cl_hostname);
|
|
}
|
|
}
|
|
/* We failed to handle the error */
|
|
return nfs4_map_errors(ret);
|
|
wait_on_recovery:
|
|
ret = nfs4_wait_clnt_recover(clp);
|
|
if (test_bit(NFS_MIG_FAILED, &server->mig_status))
|
|
return -EIO;
|
|
if (ret == 0)
|
|
exception->retry = 1;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Return 'true' if 'clp' is using an rpc_client that is integrity protected
|
|
* or 'false' otherwise.
|
|
*/
|
|
static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
|
|
{
|
|
rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
|
|
|
|
if (flavor == RPC_AUTH_GSS_KRB5I ||
|
|
flavor == RPC_AUTH_GSS_KRB5P)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
|
|
{
|
|
spin_lock(&clp->cl_lock);
|
|
if (time_before(clp->cl_last_renewal,timestamp))
|
|
clp->cl_last_renewal = timestamp;
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
|
|
static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
|
|
{
|
|
do_renew_lease(server->nfs_client, timestamp);
|
|
}
|
|
|
|
struct nfs4_call_sync_data {
|
|
const struct nfs_server *seq_server;
|
|
struct nfs4_sequence_args *seq_args;
|
|
struct nfs4_sequence_res *seq_res;
|
|
};
|
|
|
|
static void nfs4_init_sequence(struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res, int cache_reply)
|
|
{
|
|
args->sa_slot = NULL;
|
|
args->sa_cache_this = cache_reply;
|
|
args->sa_privileged = 0;
|
|
|
|
res->sr_slot = NULL;
|
|
}
|
|
|
|
static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
|
|
{
|
|
args->sa_privileged = 1;
|
|
}
|
|
|
|
static int nfs40_setup_sequence(const struct nfs_server *server,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
struct rpc_task *task)
|
|
{
|
|
struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
|
|
struct nfs4_slot *slot;
|
|
|
|
/* slot already allocated? */
|
|
if (res->sr_slot != NULL)
|
|
goto out_start;
|
|
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
|
|
goto out_sleep;
|
|
|
|
slot = nfs4_alloc_slot(tbl);
|
|
if (IS_ERR(slot)) {
|
|
if (slot == ERR_PTR(-ENOMEM))
|
|
task->tk_timeout = HZ >> 2;
|
|
goto out_sleep;
|
|
}
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
|
|
args->sa_slot = slot;
|
|
res->sr_slot = slot;
|
|
|
|
out_start:
|
|
rpc_call_start(task);
|
|
return 0;
|
|
|
|
out_sleep:
|
|
if (args->sa_privileged)
|
|
rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
|
|
NULL, RPC_PRIORITY_PRIVILEGED);
|
|
else
|
|
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static int nfs40_sequence_done(struct rpc_task *task,
|
|
struct nfs4_sequence_res *res)
|
|
{
|
|
struct nfs4_slot *slot = res->sr_slot;
|
|
struct nfs4_slot_table *tbl;
|
|
|
|
if (!RPC_WAS_SENT(task))
|
|
goto out;
|
|
|
|
tbl = slot->table;
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
if (!nfs41_wake_and_assign_slot(tbl, slot))
|
|
nfs4_free_slot(tbl, slot);
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
|
|
res->sr_slot = NULL;
|
|
out:
|
|
return 1;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
|
|
static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
|
|
{
|
|
struct nfs4_session *session;
|
|
struct nfs4_slot_table *tbl;
|
|
bool send_new_highest_used_slotid = false;
|
|
|
|
if (!res->sr_slot) {
|
|
/* just wake up the next guy waiting since
|
|
* we may have not consumed a slot after all */
|
|
dprintk("%s: No slot\n", __func__);
|
|
return;
|
|
}
|
|
tbl = res->sr_slot->table;
|
|
session = tbl->session;
|
|
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
/* Be nice to the server: try to ensure that the last transmitted
|
|
* value for highest_user_slotid <= target_highest_slotid
|
|
*/
|
|
if (tbl->highest_used_slotid > tbl->target_highest_slotid)
|
|
send_new_highest_used_slotid = true;
|
|
|
|
if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
|
|
send_new_highest_used_slotid = false;
|
|
goto out_unlock;
|
|
}
|
|
nfs4_free_slot(tbl, res->sr_slot);
|
|
|
|
if (tbl->highest_used_slotid != NFS4_NO_SLOT)
|
|
send_new_highest_used_slotid = false;
|
|
out_unlock:
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
res->sr_slot = NULL;
|
|
if (send_new_highest_used_slotid)
|
|
nfs41_server_notify_highest_slotid_update(session->clp);
|
|
}
|
|
|
|
static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
|
|
{
|
|
struct nfs4_session *session;
|
|
struct nfs4_slot *slot;
|
|
struct nfs_client *clp;
|
|
bool interrupted = false;
|
|
int ret = 1;
|
|
|
|
/* don't increment the sequence number if the task wasn't sent */
|
|
if (!RPC_WAS_SENT(task))
|
|
goto out;
|
|
|
|
slot = res->sr_slot;
|
|
session = slot->table->session;
|
|
|
|
if (slot->interrupted) {
|
|
slot->interrupted = 0;
|
|
interrupted = true;
|
|
}
|
|
|
|
trace_nfs4_sequence_done(session, res);
|
|
/* Check the SEQUENCE operation status */
|
|
switch (res->sr_status) {
|
|
case 0:
|
|
/* Update the slot's sequence and clientid lease timer */
|
|
++slot->seq_nr;
|
|
clp = session->clp;
|
|
do_renew_lease(clp, res->sr_timestamp);
|
|
/* Check sequence flags */
|
|
if (res->sr_status_flags != 0)
|
|
nfs4_schedule_lease_recovery(clp);
|
|
nfs41_update_target_slotid(slot->table, slot, res);
|
|
break;
|
|
case 1:
|
|
/*
|
|
* sr_status remains 1 if an RPC level error occurred.
|
|
* The server may or may not have processed the sequence
|
|
* operation..
|
|
* Mark the slot as having hosted an interrupted RPC call.
|
|
*/
|
|
slot->interrupted = 1;
|
|
goto out;
|
|
case -NFS4ERR_DELAY:
|
|
/* The server detected a resend of the RPC call and
|
|
* returned NFS4ERR_DELAY as per Section 2.10.6.2
|
|
* of RFC5661.
|
|
*/
|
|
dprintk("%s: slot=%u seq=%u: Operation in progress\n",
|
|
__func__,
|
|
slot->slot_nr,
|
|
slot->seq_nr);
|
|
goto out_retry;
|
|
case -NFS4ERR_BADSLOT:
|
|
/*
|
|
* The slot id we used was probably retired. Try again
|
|
* using a different slot id.
|
|
*/
|
|
goto retry_nowait;
|
|
case -NFS4ERR_SEQ_MISORDERED:
|
|
/*
|
|
* Was the last operation on this sequence interrupted?
|
|
* If so, retry after bumping the sequence number.
|
|
*/
|
|
if (interrupted) {
|
|
++slot->seq_nr;
|
|
goto retry_nowait;
|
|
}
|
|
/*
|
|
* Could this slot have been previously retired?
|
|
* If so, then the server may be expecting seq_nr = 1!
|
|
*/
|
|
if (slot->seq_nr != 1) {
|
|
slot->seq_nr = 1;
|
|
goto retry_nowait;
|
|
}
|
|
break;
|
|
case -NFS4ERR_SEQ_FALSE_RETRY:
|
|
++slot->seq_nr;
|
|
goto retry_nowait;
|
|
default:
|
|
/* Just update the slot sequence no. */
|
|
++slot->seq_nr;
|
|
}
|
|
out:
|
|
/* The session may be reset by one of the error handlers. */
|
|
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
|
|
nfs41_sequence_free_slot(res);
|
|
return ret;
|
|
retry_nowait:
|
|
if (rpc_restart_call_prepare(task)) {
|
|
task->tk_status = 0;
|
|
ret = 0;
|
|
}
|
|
goto out;
|
|
out_retry:
|
|
if (!rpc_restart_call(task))
|
|
goto out;
|
|
rpc_delay(task, NFS4_POLL_RETRY_MAX);
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_sequence_done(struct rpc_task *task,
|
|
struct nfs4_sequence_res *res)
|
|
{
|
|
if (res->sr_slot == NULL)
|
|
return 1;
|
|
if (!res->sr_slot->table->session)
|
|
return nfs40_sequence_done(task, res);
|
|
return nfs41_sequence_done(task, res);
|
|
}
|
|
|
|
int nfs41_setup_sequence(struct nfs4_session *session,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
struct rpc_task *task)
|
|
{
|
|
struct nfs4_slot *slot;
|
|
struct nfs4_slot_table *tbl;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
/* slot already allocated? */
|
|
if (res->sr_slot != NULL)
|
|
goto out_success;
|
|
|
|
tbl = &session->fc_slot_table;
|
|
|
|
task->tk_timeout = 0;
|
|
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
|
|
!args->sa_privileged) {
|
|
/* The state manager will wait until the slot table is empty */
|
|
dprintk("%s session is draining\n", __func__);
|
|
goto out_sleep;
|
|
}
|
|
|
|
slot = nfs4_alloc_slot(tbl);
|
|
if (IS_ERR(slot)) {
|
|
/* If out of memory, try again in 1/4 second */
|
|
if (slot == ERR_PTR(-ENOMEM))
|
|
task->tk_timeout = HZ >> 2;
|
|
dprintk("<-- %s: no free slots\n", __func__);
|
|
goto out_sleep;
|
|
}
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
|
|
args->sa_slot = slot;
|
|
|
|
dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
|
|
slot->slot_nr, slot->seq_nr);
|
|
|
|
res->sr_slot = slot;
|
|
res->sr_timestamp = jiffies;
|
|
res->sr_status_flags = 0;
|
|
/*
|
|
* sr_status is only set in decode_sequence, and so will remain
|
|
* set to 1 if an rpc level failure occurs.
|
|
*/
|
|
res->sr_status = 1;
|
|
trace_nfs4_setup_sequence(session, args);
|
|
out_success:
|
|
rpc_call_start(task);
|
|
return 0;
|
|
out_sleep:
|
|
/* Privileged tasks are queued with top priority */
|
|
if (args->sa_privileged)
|
|
rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
|
|
NULL, RPC_PRIORITY_PRIVILEGED);
|
|
else
|
|
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
return -EAGAIN;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
|
|
|
|
static int nfs4_setup_sequence(const struct nfs_server *server,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
struct rpc_task *task)
|
|
{
|
|
struct nfs4_session *session = nfs4_get_session(server);
|
|
int ret = 0;
|
|
|
|
if (!session)
|
|
return nfs40_setup_sequence(server, args, res, task);
|
|
|
|
dprintk("--> %s clp %p session %p sr_slot %u\n",
|
|
__func__, session->clp, session, res->sr_slot ?
|
|
res->sr_slot->slot_nr : NFS4_NO_SLOT);
|
|
|
|
ret = nfs41_setup_sequence(session, args, res, task);
|
|
|
|
dprintk("<-- %s status=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_call_sync_data *data = calldata;
|
|
struct nfs4_session *session = nfs4_get_session(data->seq_server);
|
|
|
|
dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
|
|
|
|
nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
|
|
}
|
|
|
|
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_call_sync_data *data = calldata;
|
|
|
|
nfs41_sequence_done(task, data->seq_res);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs41_call_sync_ops = {
|
|
.rpc_call_prepare = nfs41_call_sync_prepare,
|
|
.rpc_call_done = nfs41_call_sync_done,
|
|
};
|
|
|
|
#else /* !CONFIG_NFS_V4_1 */
|
|
|
|
static int nfs4_setup_sequence(const struct nfs_server *server,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
struct rpc_task *task)
|
|
{
|
|
return nfs40_setup_sequence(server, args, res, task);
|
|
}
|
|
|
|
static int nfs4_sequence_done(struct rpc_task *task,
|
|
struct nfs4_sequence_res *res)
|
|
{
|
|
return nfs40_sequence_done(task, res);
|
|
}
|
|
|
|
#endif /* !CONFIG_NFS_V4_1 */
|
|
|
|
static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_call_sync_data *data = calldata;
|
|
nfs4_setup_sequence(data->seq_server,
|
|
data->seq_args, data->seq_res, task);
|
|
}
|
|
|
|
static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_call_sync_data *data = calldata;
|
|
nfs4_sequence_done(task, data->seq_res);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs40_call_sync_ops = {
|
|
.rpc_call_prepare = nfs40_call_sync_prepare,
|
|
.rpc_call_done = nfs40_call_sync_done,
|
|
};
|
|
|
|
static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
|
|
struct nfs_server *server,
|
|
struct rpc_message *msg,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res)
|
|
{
|
|
int ret;
|
|
struct rpc_task *task;
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs4_call_sync_data data = {
|
|
.seq_server = server,
|
|
.seq_args = args,
|
|
.seq_res = res,
|
|
};
|
|
struct rpc_task_setup task_setup = {
|
|
.rpc_client = clnt,
|
|
.rpc_message = msg,
|
|
.callback_ops = clp->cl_mvops->call_sync_ops,
|
|
.callback_data = &data
|
|
};
|
|
|
|
task = rpc_run_task(&task_setup);
|
|
if (IS_ERR(task))
|
|
ret = PTR_ERR(task);
|
|
else {
|
|
ret = task->tk_status;
|
|
rpc_put_task(task);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static
|
|
int nfs4_call_sync(struct rpc_clnt *clnt,
|
|
struct nfs_server *server,
|
|
struct rpc_message *msg,
|
|
struct nfs4_sequence_args *args,
|
|
struct nfs4_sequence_res *res,
|
|
int cache_reply)
|
|
{
|
|
nfs4_init_sequence(args, res, cache_reply);
|
|
return nfs4_call_sync_sequence(clnt, server, msg, args, res);
|
|
}
|
|
|
|
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(dir);
|
|
|
|
spin_lock(&dir->i_lock);
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
|
|
if (!cinfo->atomic || cinfo->before != dir->i_version)
|
|
nfs_force_lookup_revalidate(dir);
|
|
dir->i_version = cinfo->after;
|
|
nfs_fscache_invalidate(dir);
|
|
spin_unlock(&dir->i_lock);
|
|
}
|
|
|
|
struct nfs4_opendata {
|
|
struct kref kref;
|
|
struct nfs_openargs o_arg;
|
|
struct nfs_openres o_res;
|
|
struct nfs_open_confirmargs c_arg;
|
|
struct nfs_open_confirmres c_res;
|
|
struct nfs4_string owner_name;
|
|
struct nfs4_string group_name;
|
|
struct nfs_fattr f_attr;
|
|
struct nfs4_label *f_label;
|
|
struct dentry *dir;
|
|
struct dentry *dentry;
|
|
struct nfs4_state_owner *owner;
|
|
struct nfs4_state *state;
|
|
struct iattr attrs;
|
|
unsigned long timestamp;
|
|
unsigned int rpc_done : 1;
|
|
unsigned int file_created : 1;
|
|
unsigned int is_recover : 1;
|
|
int rpc_status;
|
|
int cancelled;
|
|
};
|
|
|
|
static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
|
|
int err, struct nfs4_exception *exception)
|
|
{
|
|
if (err != -EINVAL)
|
|
return false;
|
|
if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
|
|
return false;
|
|
server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
|
|
exception->retry = 1;
|
|
return true;
|
|
}
|
|
|
|
static enum open_claim_type4
|
|
nfs4_map_atomic_open_claim(struct nfs_server *server,
|
|
enum open_claim_type4 claim)
|
|
{
|
|
if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
|
|
return claim;
|
|
switch (claim) {
|
|
default:
|
|
return claim;
|
|
case NFS4_OPEN_CLAIM_FH:
|
|
return NFS4_OPEN_CLAIM_NULL;
|
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
|
|
return NFS4_OPEN_CLAIM_DELEGATE_CUR;
|
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
|
|
return NFS4_OPEN_CLAIM_DELEGATE_PREV;
|
|
}
|
|
}
|
|
|
|
static void nfs4_init_opendata_res(struct nfs4_opendata *p)
|
|
{
|
|
p->o_res.f_attr = &p->f_attr;
|
|
p->o_res.f_label = p->f_label;
|
|
p->o_res.seqid = p->o_arg.seqid;
|
|
p->c_res.seqid = p->c_arg.seqid;
|
|
p->o_res.server = p->o_arg.server;
|
|
p->o_res.access_request = p->o_arg.access;
|
|
nfs_fattr_init(&p->f_attr);
|
|
nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
|
|
}
|
|
|
|
static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
|
|
struct nfs4_state_owner *sp, fmode_t fmode, int flags,
|
|
const struct iattr *attrs,
|
|
struct nfs4_label *label,
|
|
enum open_claim_type4 claim,
|
|
gfp_t gfp_mask)
|
|
{
|
|
struct dentry *parent = dget_parent(dentry);
|
|
struct inode *dir = parent->d_inode;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs4_opendata *p;
|
|
|
|
p = kzalloc(sizeof(*p), gfp_mask);
|
|
if (p == NULL)
|
|
goto err;
|
|
|
|
p->f_label = nfs4_label_alloc(server, gfp_mask);
|
|
if (IS_ERR(p->f_label))
|
|
goto err_free_p;
|
|
|
|
p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
|
|
if (p->o_arg.seqid == NULL)
|
|
goto err_free_label;
|
|
nfs_sb_active(dentry->d_sb);
|
|
p->dentry = dget(dentry);
|
|
p->dir = parent;
|
|
p->owner = sp;
|
|
atomic_inc(&sp->so_count);
|
|
p->o_arg.open_flags = flags;
|
|
p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
|
|
/* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
|
|
* will return permission denied for all bits until close */
|
|
if (!(flags & O_EXCL)) {
|
|
/* ask server to check for all possible rights as results
|
|
* are cached */
|
|
p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
|
|
NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
|
|
}
|
|
p->o_arg.clientid = server->nfs_client->cl_clientid;
|
|
p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
|
|
p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
|
|
p->o_arg.name = &dentry->d_name;
|
|
p->o_arg.server = server;
|
|
p->o_arg.bitmask = nfs4_bitmask(server, label);
|
|
p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
|
|
p->o_arg.label = label;
|
|
p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
|
|
switch (p->o_arg.claim) {
|
|
case NFS4_OPEN_CLAIM_NULL:
|
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
|
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
|
|
p->o_arg.fh = NFS_FH(dir);
|
|
break;
|
|
case NFS4_OPEN_CLAIM_PREVIOUS:
|
|
case NFS4_OPEN_CLAIM_FH:
|
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
|
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
|
|
p->o_arg.fh = NFS_FH(dentry->d_inode);
|
|
}
|
|
if (attrs != NULL && attrs->ia_valid != 0) {
|
|
__u32 verf[2];
|
|
|
|
p->o_arg.u.attrs = &p->attrs;
|
|
memcpy(&p->attrs, attrs, sizeof(p->attrs));
|
|
|
|
verf[0] = jiffies;
|
|
verf[1] = current->pid;
|
|
memcpy(p->o_arg.u.verifier.data, verf,
|
|
sizeof(p->o_arg.u.verifier.data));
|
|
}
|
|
p->c_arg.fh = &p->o_res.fh;
|
|
p->c_arg.stateid = &p->o_res.stateid;
|
|
p->c_arg.seqid = p->o_arg.seqid;
|
|
nfs4_init_opendata_res(p);
|
|
kref_init(&p->kref);
|
|
return p;
|
|
|
|
err_free_label:
|
|
nfs4_label_free(p->f_label);
|
|
err_free_p:
|
|
kfree(p);
|
|
err:
|
|
dput(parent);
|
|
return NULL;
|
|
}
|
|
|
|
static void nfs4_opendata_free(struct kref *kref)
|
|
{
|
|
struct nfs4_opendata *p = container_of(kref,
|
|
struct nfs4_opendata, kref);
|
|
struct super_block *sb = p->dentry->d_sb;
|
|
|
|
nfs_free_seqid(p->o_arg.seqid);
|
|
if (p->state != NULL)
|
|
nfs4_put_open_state(p->state);
|
|
nfs4_put_state_owner(p->owner);
|
|
|
|
nfs4_label_free(p->f_label);
|
|
|
|
dput(p->dir);
|
|
dput(p->dentry);
|
|
nfs_sb_deactive(sb);
|
|
nfs_fattr_free_names(&p->f_attr);
|
|
kfree(p);
|
|
}
|
|
|
|
static void nfs4_opendata_put(struct nfs4_opendata *p)
|
|
{
|
|
if (p != NULL)
|
|
kref_put(&p->kref, nfs4_opendata_free);
|
|
}
|
|
|
|
static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
|
|
{
|
|
int ret;
|
|
|
|
ret = rpc_wait_for_completion_task(task);
|
|
return ret;
|
|
}
|
|
|
|
static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (open_mode & (O_EXCL|O_TRUNC))
|
|
goto out;
|
|
switch (mode & (FMODE_READ|FMODE_WRITE)) {
|
|
case FMODE_READ:
|
|
ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
|
|
&& state->n_rdonly != 0;
|
|
break;
|
|
case FMODE_WRITE:
|
|
ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
|
|
&& state->n_wronly != 0;
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
|
|
&& state->n_rdwr != 0;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
|
|
{
|
|
if (delegation == NULL)
|
|
return 0;
|
|
if ((delegation->type & fmode) != fmode)
|
|
return 0;
|
|
if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
|
|
return 0;
|
|
if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
|
|
return 0;
|
|
nfs_mark_delegation_referenced(delegation);
|
|
return 1;
|
|
}
|
|
|
|
static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
|
|
{
|
|
switch (fmode) {
|
|
case FMODE_WRITE:
|
|
state->n_wronly++;
|
|
break;
|
|
case FMODE_READ:
|
|
state->n_rdonly++;
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
state->n_rdwr++;
|
|
}
|
|
nfs4_state_set_mode_locked(state, state->state | fmode);
|
|
}
|
|
|
|
static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
|
|
{
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
|
|
nfs4_stateid_copy(&state->stateid, stateid);
|
|
nfs4_stateid_copy(&state->open_stateid, stateid);
|
|
set_bit(NFS_OPEN_STATE, &state->flags);
|
|
switch (fmode) {
|
|
case FMODE_READ:
|
|
set_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
break;
|
|
case FMODE_WRITE:
|
|
set_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
set_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
}
|
|
}
|
|
|
|
static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
|
|
{
|
|
write_seqlock(&state->seqlock);
|
|
nfs_set_open_stateid_locked(state, stateid, fmode);
|
|
write_sequnlock(&state->seqlock);
|
|
}
|
|
|
|
static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
|
|
{
|
|
/*
|
|
* Protect the call to nfs4_state_set_mode_locked and
|
|
* serialise the stateid update
|
|
*/
|
|
write_seqlock(&state->seqlock);
|
|
if (deleg_stateid != NULL) {
|
|
nfs4_stateid_copy(&state->stateid, deleg_stateid);
|
|
set_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
}
|
|
if (open_stateid != NULL)
|
|
nfs_set_open_stateid_locked(state, open_stateid, fmode);
|
|
write_sequnlock(&state->seqlock);
|
|
spin_lock(&state->owner->so_lock);
|
|
update_open_stateflags(state, fmode);
|
|
spin_unlock(&state->owner->so_lock);
|
|
}
|
|
|
|
static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
struct nfs_delegation *deleg_cur;
|
|
int ret = 0;
|
|
|
|
fmode &= (FMODE_READ|FMODE_WRITE);
|
|
|
|
rcu_read_lock();
|
|
deleg_cur = rcu_dereference(nfsi->delegation);
|
|
if (deleg_cur == NULL)
|
|
goto no_delegation;
|
|
|
|
spin_lock(&deleg_cur->lock);
|
|
if (rcu_dereference(nfsi->delegation) != deleg_cur ||
|
|
test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
|
|
(deleg_cur->type & fmode) != fmode)
|
|
goto no_delegation_unlock;
|
|
|
|
if (delegation == NULL)
|
|
delegation = &deleg_cur->stateid;
|
|
else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
|
|
goto no_delegation_unlock;
|
|
|
|
nfs_mark_delegation_referenced(deleg_cur);
|
|
__update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
|
|
ret = 1;
|
|
no_delegation_unlock:
|
|
spin_unlock(&deleg_cur->lock);
|
|
no_delegation:
|
|
rcu_read_unlock();
|
|
|
|
if (!ret && open_stateid != NULL) {
|
|
__update_open_stateid(state, open_stateid, NULL, fmode);
|
|
ret = 1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
|
|
{
|
|
struct nfs_delegation *delegation;
|
|
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(inode)->delegation);
|
|
if (delegation == NULL || (delegation->type & fmode) == fmode) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
rcu_read_unlock();
|
|
nfs4_inode_return_delegation(inode);
|
|
}
|
|
|
|
static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
|
|
{
|
|
struct nfs4_state *state = opendata->state;
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
struct nfs_delegation *delegation;
|
|
int open_mode = opendata->o_arg.open_flags;
|
|
fmode_t fmode = opendata->o_arg.fmode;
|
|
nfs4_stateid stateid;
|
|
int ret = -EAGAIN;
|
|
|
|
for (;;) {
|
|
if (can_open_cached(state, fmode, open_mode)) {
|
|
spin_lock(&state->owner->so_lock);
|
|
if (can_open_cached(state, fmode, open_mode)) {
|
|
update_open_stateflags(state, fmode);
|
|
spin_unlock(&state->owner->so_lock);
|
|
goto out_return_state;
|
|
}
|
|
spin_unlock(&state->owner->so_lock);
|
|
}
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(nfsi->delegation);
|
|
if (!can_open_delegated(delegation, fmode)) {
|
|
rcu_read_unlock();
|
|
break;
|
|
}
|
|
/* Save the delegation */
|
|
nfs4_stateid_copy(&stateid, &delegation->stateid);
|
|
rcu_read_unlock();
|
|
nfs_release_seqid(opendata->o_arg.seqid);
|
|
if (!opendata->is_recover) {
|
|
ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
|
|
if (ret != 0)
|
|
goto out;
|
|
}
|
|
ret = -EAGAIN;
|
|
|
|
/* Try to update the stateid using the delegation */
|
|
if (update_open_stateid(state, NULL, &stateid, fmode))
|
|
goto out_return_state;
|
|
}
|
|
out:
|
|
return ERR_PTR(ret);
|
|
out_return_state:
|
|
atomic_inc(&state->count);
|
|
return state;
|
|
}
|
|
|
|
static void
|
|
nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
|
|
{
|
|
struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
|
|
struct nfs_delegation *delegation;
|
|
int delegation_flags = 0;
|
|
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
|
|
if (delegation)
|
|
delegation_flags = delegation->flags;
|
|
rcu_read_unlock();
|
|
if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
|
|
pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
|
|
"returning a delegation for "
|
|
"OPEN(CLAIM_DELEGATE_CUR)\n",
|
|
clp->cl_hostname);
|
|
} else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
|
|
nfs_inode_set_delegation(state->inode,
|
|
data->owner->so_cred,
|
|
&data->o_res);
|
|
else
|
|
nfs_inode_reclaim_delegation(state->inode,
|
|
data->owner->so_cred,
|
|
&data->o_res);
|
|
}
|
|
|
|
/*
|
|
* Check the inode attributes against the CLAIM_PREVIOUS returned attributes
|
|
* and update the nfs4_state.
|
|
*/
|
|
static struct nfs4_state *
|
|
_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *inode = data->state->inode;
|
|
struct nfs4_state *state = data->state;
|
|
int ret;
|
|
|
|
if (!data->rpc_done) {
|
|
if (data->rpc_status) {
|
|
ret = data->rpc_status;
|
|
goto err;
|
|
}
|
|
/* cached opens have already been processed */
|
|
goto update;
|
|
}
|
|
|
|
ret = nfs_refresh_inode(inode, &data->f_attr);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (data->o_res.delegation_type != 0)
|
|
nfs4_opendata_check_deleg(data, state);
|
|
update:
|
|
update_open_stateid(state, &data->o_res.stateid, NULL,
|
|
data->o_arg.fmode);
|
|
atomic_inc(&state->count);
|
|
|
|
return state;
|
|
err:
|
|
return ERR_PTR(ret);
|
|
|
|
}
|
|
|
|
static struct nfs4_state *
|
|
_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *inode;
|
|
struct nfs4_state *state = NULL;
|
|
int ret;
|
|
|
|
if (!data->rpc_done) {
|
|
state = nfs4_try_open_cached(data);
|
|
goto out;
|
|
}
|
|
|
|
ret = -EAGAIN;
|
|
if (!(data->f_attr.valid & NFS_ATTR_FATTR))
|
|
goto err;
|
|
inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
|
|
ret = PTR_ERR(inode);
|
|
if (IS_ERR(inode))
|
|
goto err;
|
|
ret = -ENOMEM;
|
|
state = nfs4_get_open_state(inode, data->owner);
|
|
if (state == NULL)
|
|
goto err_put_inode;
|
|
if (data->o_res.delegation_type != 0)
|
|
nfs4_opendata_check_deleg(data, state);
|
|
update_open_stateid(state, &data->o_res.stateid, NULL,
|
|
data->o_arg.fmode);
|
|
iput(inode);
|
|
out:
|
|
nfs_release_seqid(data->o_arg.seqid);
|
|
return state;
|
|
err_put_inode:
|
|
iput(inode);
|
|
err:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct nfs4_state *
|
|
nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
|
|
{
|
|
if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
|
|
return _nfs4_opendata_reclaim_to_nfs4_state(data);
|
|
return _nfs4_opendata_to_nfs4_state(data);
|
|
}
|
|
|
|
static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
struct nfs_open_context *ctx;
|
|
|
|
spin_lock(&state->inode->i_lock);
|
|
list_for_each_entry(ctx, &nfsi->open_files, list) {
|
|
if (ctx->state != state)
|
|
continue;
|
|
get_nfs_open_context(ctx);
|
|
spin_unlock(&state->inode->i_lock);
|
|
return ctx;
|
|
}
|
|
spin_unlock(&state->inode->i_lock);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
|
|
struct nfs4_state *state, enum open_claim_type4 claim)
|
|
{
|
|
struct nfs4_opendata *opendata;
|
|
|
|
opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
|
|
NULL, NULL, claim, GFP_NOFS);
|
|
if (opendata == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
opendata->state = state;
|
|
atomic_inc(&state->count);
|
|
return opendata;
|
|
}
|
|
|
|
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
|
|
{
|
|
struct nfs4_state *newstate;
|
|
int ret;
|
|
|
|
opendata->o_arg.open_flags = 0;
|
|
opendata->o_arg.fmode = fmode;
|
|
memset(&opendata->o_res, 0, sizeof(opendata->o_res));
|
|
memset(&opendata->c_res, 0, sizeof(opendata->c_res));
|
|
nfs4_init_opendata_res(opendata);
|
|
ret = _nfs4_recover_proc_open(opendata);
|
|
if (ret != 0)
|
|
return ret;
|
|
newstate = nfs4_opendata_to_nfs4_state(opendata);
|
|
if (IS_ERR(newstate))
|
|
return PTR_ERR(newstate);
|
|
nfs4_close_state(newstate, fmode);
|
|
*res = newstate;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
|
|
{
|
|
struct nfs4_state *newstate;
|
|
int ret;
|
|
|
|
/* memory barrier prior to reading state->n_* */
|
|
clear_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
clear_bit(NFS_OPEN_STATE, &state->flags);
|
|
smp_rmb();
|
|
if (state->n_rdwr != 0) {
|
|
clear_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
if (state->n_wronly != 0) {
|
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
if (state->n_rdonly != 0) {
|
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
/*
|
|
* We may have performed cached opens for all three recoveries.
|
|
* Check if we need to update the current stateid.
|
|
*/
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
|
|
!nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
|
|
write_seqlock(&state->seqlock);
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
|
|
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
|
|
write_sequnlock(&state->seqlock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* OPEN_RECLAIM:
|
|
* reclaim state on the server after a reboot.
|
|
*/
|
|
static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_delegation *delegation;
|
|
struct nfs4_opendata *opendata;
|
|
fmode_t delegation_type = 0;
|
|
int status;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state,
|
|
NFS4_OPEN_CLAIM_PREVIOUS);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
|
|
if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
|
|
delegation_type = delegation->type;
|
|
rcu_read_unlock();
|
|
opendata->o_arg.u.delegation_type = delegation_type;
|
|
status = nfs4_open_recover(opendata, state);
|
|
nfs4_opendata_put(opendata);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_do_open_reclaim(ctx, state);
|
|
trace_nfs4_open_reclaim(ctx, 0, err);
|
|
if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
|
|
continue;
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
int ret;
|
|
|
|
ctx = nfs4_state_find_open_context(state);
|
|
if (IS_ERR(ctx))
|
|
return -EAGAIN;
|
|
ret = nfs4_do_open_reclaim(ctx, state);
|
|
put_nfs_open_context(ctx);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
|
|
{
|
|
switch (err) {
|
|
default:
|
|
printk(KERN_ERR "NFS: %s: unhandled error "
|
|
"%d.\n", __func__, err);
|
|
case 0:
|
|
case -ENOENT:
|
|
case -ESTALE:
|
|
break;
|
|
case -NFS4ERR_BADSESSION:
|
|
case -NFS4ERR_BADSLOT:
|
|
case -NFS4ERR_BAD_HIGH_SLOT:
|
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
|
|
case -NFS4ERR_DEADSESSION:
|
|
set_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
|
|
return -EAGAIN;
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
set_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
case -NFS4ERR_EXPIRED:
|
|
/* Don't recall a delegation if it was lost */
|
|
nfs4_schedule_lease_recovery(server->nfs_client);
|
|
return -EAGAIN;
|
|
case -NFS4ERR_MOVED:
|
|
nfs4_schedule_migration_recovery(server);
|
|
return -EAGAIN;
|
|
case -NFS4ERR_LEASE_MOVED:
|
|
nfs4_schedule_lease_moved_recovery(server->nfs_client);
|
|
return -EAGAIN;
|
|
case -NFS4ERR_DELEG_REVOKED:
|
|
case -NFS4ERR_ADMIN_REVOKED:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
case -NFS4ERR_OPENMODE:
|
|
nfs_inode_find_state_and_recover(state->inode,
|
|
stateid);
|
|
nfs4_schedule_stateid_recovery(server, state);
|
|
return 0;
|
|
case -NFS4ERR_DELAY:
|
|
case -NFS4ERR_GRACE:
|
|
set_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
ssleep(1);
|
|
return -EAGAIN;
|
|
case -ENOMEM:
|
|
case -NFS4ERR_DENIED:
|
|
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
|
|
return 0;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_opendata *opendata;
|
|
int err;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state,
|
|
NFS4_OPEN_CLAIM_DELEG_CUR_FH);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
|
|
err = nfs4_open_recover(opendata, state);
|
|
nfs4_opendata_put(opendata);
|
|
return nfs4_handle_delegation_recall_error(server, state, stateid, err);
|
|
}
|
|
|
|
static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
|
|
nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
|
|
&data->o_res.seq_res, task);
|
|
}
|
|
|
|
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
|
|
nfs40_sequence_done(task, &data->o_res.seq_res);
|
|
|
|
data->rpc_status = task->tk_status;
|
|
if (data->rpc_status == 0) {
|
|
nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
|
|
nfs_confirm_seqid(&data->owner->so_seqid, 0);
|
|
renew_lease(data->o_res.server, data->timestamp);
|
|
data->rpc_done = 1;
|
|
}
|
|
}
|
|
|
|
static void nfs4_open_confirm_release(void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state *state = NULL;
|
|
|
|
/* If this request hasn't been cancelled, do nothing */
|
|
if (data->cancelled == 0)
|
|
goto out_free;
|
|
/* In case of error, no cleanup! */
|
|
if (!data->rpc_done)
|
|
goto out_free;
|
|
state = nfs4_opendata_to_nfs4_state(data);
|
|
if (!IS_ERR(state))
|
|
nfs4_close_state(state, data->o_arg.fmode);
|
|
out_free:
|
|
nfs4_opendata_put(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_open_confirm_ops = {
|
|
.rpc_call_prepare = nfs4_open_confirm_prepare,
|
|
.rpc_call_done = nfs4_open_confirm_done,
|
|
.rpc_release = nfs4_open_confirm_release,
|
|
};
|
|
|
|
/*
|
|
* Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
|
|
*/
|
|
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
|
|
.rpc_argp = &data->c_arg,
|
|
.rpc_resp = &data->c_res,
|
|
.rpc_cred = data->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_open_confirm_ops,
|
|
.callback_data = data,
|
|
.workqueue = nfsiod_workqueue,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status;
|
|
|
|
nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
|
|
kref_get(&data->kref);
|
|
data->rpc_done = 0;
|
|
data->rpc_status = 0;
|
|
data->timestamp = jiffies;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0) {
|
|
data->cancelled = 1;
|
|
smp_wmb();
|
|
} else
|
|
status = data->rpc_status;
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state_owner *sp = data->owner;
|
|
struct nfs_client *clp = sp->so_server->nfs_client;
|
|
|
|
if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
|
|
goto out_wait;
|
|
/*
|
|
* Check if we still need to send an OPEN call, or if we can use
|
|
* a delegation instead.
|
|
*/
|
|
if (data->state != NULL) {
|
|
struct nfs_delegation *delegation;
|
|
|
|
if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
|
|
goto out_no_action;
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
|
|
if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
|
|
data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
|
|
can_open_delegated(delegation, data->o_arg.fmode))
|
|
goto unlock_no_action;
|
|
rcu_read_unlock();
|
|
}
|
|
/* Update client id. */
|
|
data->o_arg.clientid = clp->cl_clientid;
|
|
switch (data->o_arg.claim) {
|
|
case NFS4_OPEN_CLAIM_PREVIOUS:
|
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
|
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
|
|
data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
|
|
case NFS4_OPEN_CLAIM_FH:
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
|
|
nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
|
|
}
|
|
data->timestamp = jiffies;
|
|
if (nfs4_setup_sequence(data->o_arg.server,
|
|
&data->o_arg.seq_args,
|
|
&data->o_res.seq_res,
|
|
task) != 0)
|
|
nfs_release_seqid(data->o_arg.seqid);
|
|
|
|
/* Set the create mode (note dependency on the session type) */
|
|
data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
|
|
if (data->o_arg.open_flags & O_EXCL) {
|
|
data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
|
|
if (nfs4_has_persistent_session(clp))
|
|
data->o_arg.createmode = NFS4_CREATE_GUARDED;
|
|
else if (clp->cl_mvops->minor_version > 0)
|
|
data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
|
|
}
|
|
return;
|
|
unlock_no_action:
|
|
rcu_read_unlock();
|
|
out_no_action:
|
|
task->tk_action = NULL;
|
|
out_wait:
|
|
nfs4_sequence_done(task, &data->o_res.seq_res);
|
|
}
|
|
|
|
static void nfs4_open_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
|
|
data->rpc_status = task->tk_status;
|
|
|
|
if (!nfs4_sequence_done(task, &data->o_res.seq_res))
|
|
return;
|
|
|
|
if (task->tk_status == 0) {
|
|
if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
|
|
switch (data->o_res.f_attr->mode & S_IFMT) {
|
|
case S_IFREG:
|
|
break;
|
|
case S_IFLNK:
|
|
data->rpc_status = -ELOOP;
|
|
break;
|
|
case S_IFDIR:
|
|
data->rpc_status = -EISDIR;
|
|
break;
|
|
default:
|
|
data->rpc_status = -ENOTDIR;
|
|
}
|
|
}
|
|
renew_lease(data->o_res.server, data->timestamp);
|
|
if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
|
|
nfs_confirm_seqid(&data->owner->so_seqid, 0);
|
|
}
|
|
data->rpc_done = 1;
|
|
}
|
|
|
|
static void nfs4_open_release(void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state *state = NULL;
|
|
|
|
/* If this request hasn't been cancelled, do nothing */
|
|
if (data->cancelled == 0)
|
|
goto out_free;
|
|
/* In case of error, no cleanup! */
|
|
if (data->rpc_status != 0 || !data->rpc_done)
|
|
goto out_free;
|
|
/* In case we need an open_confirm, no cleanup! */
|
|
if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
|
|
goto out_free;
|
|
state = nfs4_opendata_to_nfs4_state(data);
|
|
if (!IS_ERR(state))
|
|
nfs4_close_state(state, data->o_arg.fmode);
|
|
out_free:
|
|
nfs4_opendata_put(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_open_ops = {
|
|
.rpc_call_prepare = nfs4_open_prepare,
|
|
.rpc_call_done = nfs4_open_done,
|
|
.rpc_release = nfs4_open_release,
|
|
};
|
|
|
|
static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
|
|
{
|
|
struct inode *dir = data->dir->d_inode;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_openargs *o_arg = &data->o_arg;
|
|
struct nfs_openres *o_res = &data->o_res;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
|
|
.rpc_argp = o_arg,
|
|
.rpc_resp = o_res,
|
|
.rpc_cred = data->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_open_ops,
|
|
.callback_data = data,
|
|
.workqueue = nfsiod_workqueue,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status;
|
|
|
|
nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
|
|
kref_get(&data->kref);
|
|
data->rpc_done = 0;
|
|
data->rpc_status = 0;
|
|
data->cancelled = 0;
|
|
data->is_recover = 0;
|
|
if (isrecover) {
|
|
nfs4_set_sequence_privileged(&o_arg->seq_args);
|
|
data->is_recover = 1;
|
|
}
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0) {
|
|
data->cancelled = 1;
|
|
smp_wmb();
|
|
} else
|
|
status = data->rpc_status;
|
|
rpc_put_task(task);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *dir = data->dir->d_inode;
|
|
struct nfs_openres *o_res = &data->o_res;
|
|
int status;
|
|
|
|
status = nfs4_run_open_task(data, 1);
|
|
if (status != 0 || !data->rpc_done)
|
|
return status;
|
|
|
|
nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
|
|
|
|
if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
|
|
status = _nfs4_proc_open_confirm(data);
|
|
if (status != 0)
|
|
return status;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_opendata_access(struct rpc_cred *cred,
|
|
struct nfs4_opendata *opendata,
|
|
struct nfs4_state *state, fmode_t fmode,
|
|
int openflags)
|
|
{
|
|
struct nfs_access_entry cache;
|
|
u32 mask;
|
|
|
|
/* access call failed or for some reason the server doesn't
|
|
* support any access modes -- defer access call until later */
|
|
if (opendata->o_res.access_supported == 0)
|
|
return 0;
|
|
|
|
mask = 0;
|
|
/* don't check MAY_WRITE - a newly created file may not have
|
|
* write mode bits, but POSIX allows the creating process to write.
|
|
* use openflags to check for exec, because fmode won't
|
|
* always have FMODE_EXEC set when file open for exec. */
|
|
if (openflags & __FMODE_EXEC) {
|
|
/* ONLY check for exec rights */
|
|
mask = MAY_EXEC;
|
|
} else if (fmode & FMODE_READ)
|
|
mask = MAY_READ;
|
|
|
|
cache.cred = cred;
|
|
cache.jiffies = jiffies;
|
|
nfs_access_set_mask(&cache, opendata->o_res.access_result);
|
|
nfs_access_add_cache(state->inode, &cache);
|
|
|
|
if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
|
|
return 0;
|
|
|
|
/* even though OPEN succeeded, access is denied. Close the file */
|
|
nfs4_close_state(state, fmode);
|
|
return -EACCES;
|
|
}
|
|
|
|
/*
|
|
* Note: On error, nfs4_proc_open will free the struct nfs4_opendata
|
|
*/
|
|
static int _nfs4_proc_open(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *dir = data->dir->d_inode;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_openargs *o_arg = &data->o_arg;
|
|
struct nfs_openres *o_res = &data->o_res;
|
|
int status;
|
|
|
|
status = nfs4_run_open_task(data, 0);
|
|
if (!data->rpc_done)
|
|
return status;
|
|
if (status != 0) {
|
|
if (status == -NFS4ERR_BADNAME &&
|
|
!(o_arg->open_flags & O_CREAT))
|
|
return -ENOENT;
|
|
return status;
|
|
}
|
|
|
|
nfs_fattr_map_and_free_names(server, &data->f_attr);
|
|
|
|
if (o_arg->open_flags & O_CREAT) {
|
|
update_changeattr(dir, &o_res->cinfo);
|
|
if (o_arg->open_flags & O_EXCL)
|
|
data->file_created = 1;
|
|
else if (o_res->cinfo.before != o_res->cinfo.after)
|
|
data->file_created = 1;
|
|
}
|
|
if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
|
|
server->caps &= ~NFS_CAP_POSIX_LOCK;
|
|
if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
|
|
status = _nfs4_proc_open_confirm(data);
|
|
if (status != 0)
|
|
return status;
|
|
}
|
|
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
|
|
_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_recover_expired_lease(struct nfs_server *server)
|
|
{
|
|
return nfs4_client_recover_expired_lease(server->nfs_client);
|
|
}
|
|
|
|
/*
|
|
* OPEN_EXPIRED:
|
|
* reclaim state on the server after a network partition.
|
|
* Assumes caller holds the appropriate lock
|
|
*/
|
|
static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs4_opendata *opendata;
|
|
int ret;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state,
|
|
NFS4_OPEN_CLAIM_FH);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
ret = nfs4_open_recover(opendata, state);
|
|
if (ret == -ESTALE)
|
|
d_drop(ctx->dentry);
|
|
nfs4_opendata_put(opendata);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_open_expired(ctx, state);
|
|
trace_nfs4_open_expired(ctx, 0, err);
|
|
if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
|
|
continue;
|
|
switch (err) {
|
|
default:
|
|
goto out;
|
|
case -NFS4ERR_GRACE:
|
|
case -NFS4ERR_DELAY:
|
|
nfs4_handle_exception(server, err, &exception);
|
|
err = 0;
|
|
}
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
int ret;
|
|
|
|
ctx = nfs4_state_find_open_context(state);
|
|
if (IS_ERR(ctx))
|
|
return -EAGAIN;
|
|
ret = nfs4_do_open_expired(ctx, state);
|
|
put_nfs_open_context(ctx);
|
|
return ret;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
nfs4_stateid *stateid = &state->stateid;
|
|
struct nfs_delegation *delegation;
|
|
struct rpc_cred *cred = NULL;
|
|
int status = -NFS4ERR_BAD_STATEID;
|
|
|
|
/* If a state reset has been done, test_stateid is unneeded */
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
|
|
return;
|
|
|
|
/* Get the delegation credential for use by test/free_stateid */
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
|
|
if (delegation != NULL &&
|
|
nfs4_stateid_match(&delegation->stateid, stateid)) {
|
|
cred = get_rpccred(delegation->cred);
|
|
rcu_read_unlock();
|
|
status = nfs41_test_stateid(server, stateid, cred);
|
|
trace_nfs4_test_delegation_stateid(state, NULL, status);
|
|
} else
|
|
rcu_read_unlock();
|
|
|
|
if (status != NFS_OK) {
|
|
/* Free the stateid unless the server explicitly
|
|
* informs us the stateid is unrecognized. */
|
|
if (status != -NFS4ERR_BAD_STATEID)
|
|
nfs41_free_stateid(server, stateid, cred);
|
|
nfs_remove_bad_delegation(state->inode);
|
|
|
|
write_seqlock(&state->seqlock);
|
|
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
|
|
write_sequnlock(&state->seqlock);
|
|
clear_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
}
|
|
|
|
if (cred != NULL)
|
|
put_rpccred(cred);
|
|
}
|
|
|
|
/**
|
|
* nfs41_check_open_stateid - possibly free an open stateid
|
|
*
|
|
* @state: NFSv4 state for an inode
|
|
*
|
|
* Returns NFS_OK if recovery for this stateid is now finished.
|
|
* Otherwise a negative NFS4ERR value is returned.
|
|
*/
|
|
static int nfs41_check_open_stateid(struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
nfs4_stateid *stateid = &state->open_stateid;
|
|
struct rpc_cred *cred = state->owner->so_cred;
|
|
int status;
|
|
|
|
/* If a state reset has been done, test_stateid is unneeded */
|
|
if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
|
|
(test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
|
|
(test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
|
|
return -NFS4ERR_BAD_STATEID;
|
|
|
|
status = nfs41_test_stateid(server, stateid, cred);
|
|
trace_nfs4_test_open_stateid(state, NULL, status);
|
|
if (status != NFS_OK) {
|
|
/* Free the stateid unless the server explicitly
|
|
* informs us the stateid is unrecognized. */
|
|
if (status != -NFS4ERR_BAD_STATEID)
|
|
nfs41_free_stateid(server, stateid, cred);
|
|
|
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
clear_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
clear_bit(NFS_OPEN_STATE, &state->flags);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
|
|
{
|
|
int status;
|
|
|
|
nfs41_clear_delegation_stateid(state);
|
|
status = nfs41_check_open_stateid(state);
|
|
if (status != NFS_OK)
|
|
status = nfs4_open_expired(sp, state);
|
|
return status;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
|
|
* fields corresponding to attributes that were used to store the verifier.
|
|
* Make sure we clobber those fields in the later setattr call
|
|
*/
|
|
static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
|
|
{
|
|
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
|
|
!(sattr->ia_valid & ATTR_ATIME_SET))
|
|
sattr->ia_valid |= ATTR_ATIME;
|
|
|
|
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
|
|
!(sattr->ia_valid & ATTR_MTIME_SET))
|
|
sattr->ia_valid |= ATTR_MTIME;
|
|
}
|
|
|
|
static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
|
|
fmode_t fmode,
|
|
int flags,
|
|
struct nfs_open_context *ctx)
|
|
{
|
|
struct nfs4_state_owner *sp = opendata->owner;
|
|
struct nfs_server *server = sp->so_server;
|
|
struct dentry *dentry;
|
|
struct nfs4_state *state;
|
|
unsigned int seq;
|
|
int ret;
|
|
|
|
seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
|
|
|
|
ret = _nfs4_proc_open(opendata);
|
|
if (ret != 0)
|
|
goto out;
|
|
|
|
state = nfs4_opendata_to_nfs4_state(opendata);
|
|
ret = PTR_ERR(state);
|
|
if (IS_ERR(state))
|
|
goto out;
|
|
if (server->caps & NFS_CAP_POSIX_LOCK)
|
|
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
|
|
|
|
dentry = opendata->dentry;
|
|
if (dentry->d_inode == NULL) {
|
|
/* FIXME: Is this d_drop() ever needed? */
|
|
d_drop(dentry);
|
|
dentry = d_add_unique(dentry, igrab(state->inode));
|
|
if (dentry == NULL) {
|
|
dentry = opendata->dentry;
|
|
} else if (dentry != ctx->dentry) {
|
|
dput(ctx->dentry);
|
|
ctx->dentry = dget(dentry);
|
|
}
|
|
nfs_set_verifier(dentry,
|
|
nfs_save_change_attribute(opendata->dir->d_inode));
|
|
}
|
|
|
|
ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
|
|
if (ret != 0)
|
|
goto out;
|
|
|
|
ctx->state = state;
|
|
if (dentry->d_inode == state->inode) {
|
|
nfs_inode_attach_open_context(ctx);
|
|
if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
|
|
nfs4_schedule_stateid_recovery(server, state);
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Returns a referenced nfs4_state
|
|
*/
|
|
static int _nfs4_do_open(struct inode *dir,
|
|
struct nfs_open_context *ctx,
|
|
int flags,
|
|
struct iattr *sattr,
|
|
struct nfs4_label *label,
|
|
int *opened)
|
|
{
|
|
struct nfs4_state_owner *sp;
|
|
struct nfs4_state *state = NULL;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs4_opendata *opendata;
|
|
struct dentry *dentry = ctx->dentry;
|
|
struct rpc_cred *cred = ctx->cred;
|
|
struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
|
|
fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
|
|
enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
|
|
struct nfs4_label *olabel = NULL;
|
|
int status;
|
|
|
|
/* Protect against reboot recovery conflicts */
|
|
status = -ENOMEM;
|
|
sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
|
|
if (sp == NULL) {
|
|
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
|
|
goto out_err;
|
|
}
|
|
status = nfs4_recover_expired_lease(server);
|
|
if (status != 0)
|
|
goto err_put_state_owner;
|
|
if (dentry->d_inode != NULL)
|
|
nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
|
|
status = -ENOMEM;
|
|
if (dentry->d_inode)
|
|
claim = NFS4_OPEN_CLAIM_FH;
|
|
opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
|
|
label, claim, GFP_KERNEL);
|
|
if (opendata == NULL)
|
|
goto err_put_state_owner;
|
|
|
|
if (label) {
|
|
olabel = nfs4_label_alloc(server, GFP_KERNEL);
|
|
if (IS_ERR(olabel)) {
|
|
status = PTR_ERR(olabel);
|
|
goto err_opendata_put;
|
|
}
|
|
}
|
|
|
|
if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
|
|
opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
|
|
if (!opendata->f_attr.mdsthreshold)
|
|
goto err_free_label;
|
|
opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
|
|
}
|
|
if (dentry->d_inode != NULL)
|
|
opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
|
|
|
|
status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
|
|
if (status != 0)
|
|
goto err_free_label;
|
|
state = ctx->state;
|
|
|
|
if ((opendata->o_arg.open_flags & O_EXCL) &&
|
|
(opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
|
|
nfs4_exclusive_attrset(opendata, sattr);
|
|
|
|
nfs_fattr_init(opendata->o_res.f_attr);
|
|
status = nfs4_do_setattr(state->inode, cred,
|
|
opendata->o_res.f_attr, sattr,
|
|
state, label, olabel);
|
|
if (status == 0) {
|
|
nfs_setattr_update_inode(state->inode, sattr);
|
|
nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
|
|
nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
|
|
}
|
|
}
|
|
if (opendata->file_created)
|
|
*opened |= FILE_CREATED;
|
|
|
|
if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
|
|
*ctx_th = opendata->f_attr.mdsthreshold;
|
|
else
|
|
kfree(opendata->f_attr.mdsthreshold);
|
|
opendata->f_attr.mdsthreshold = NULL;
|
|
|
|
nfs4_label_free(olabel);
|
|
|
|
nfs4_opendata_put(opendata);
|
|
nfs4_put_state_owner(sp);
|
|
return 0;
|
|
err_free_label:
|
|
nfs4_label_free(olabel);
|
|
err_opendata_put:
|
|
kfree(opendata->f_attr.mdsthreshold);
|
|
nfs4_opendata_put(opendata);
|
|
err_put_state_owner:
|
|
nfs4_put_state_owner(sp);
|
|
out_err:
|
|
return status;
|
|
}
|
|
|
|
|
|
static struct nfs4_state *nfs4_do_open(struct inode *dir,
|
|
struct nfs_open_context *ctx,
|
|
int flags,
|
|
struct iattr *sattr,
|
|
struct nfs4_label *label,
|
|
int *opened)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs4_exception exception = { };
|
|
struct nfs4_state *res;
|
|
int status;
|
|
|
|
do {
|
|
status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
|
|
res = ctx->state;
|
|
trace_nfs4_open_file(ctx, flags, status);
|
|
if (status == 0)
|
|
break;
|
|
/* NOTE: BAD_SEQID means the server and client disagree about the
|
|
* book-keeping w.r.t. state-changing operations
|
|
* (OPEN/CLOSE/LOCK/LOCKU...)
|
|
* It is actually a sign of a bug on the client or on the server.
|
|
*
|
|
* If we receive a BAD_SEQID error in the particular case of
|
|
* doing an OPEN, we assume that nfs_increment_open_seqid() will
|
|
* have unhashed the old state_owner for us, and that we can
|
|
* therefore safely retry using a new one. We should still warn
|
|
* the user though...
|
|
*/
|
|
if (status == -NFS4ERR_BAD_SEQID) {
|
|
pr_warn_ratelimited("NFS: v4 server %s "
|
|
" returned a bad sequence-id error!\n",
|
|
NFS_SERVER(dir)->nfs_client->cl_hostname);
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
/*
|
|
* BAD_STATEID on OPEN means that the server cancelled our
|
|
* state before it received the OPEN_CONFIRM.
|
|
* Recover by retrying the request as per the discussion
|
|
* on Page 181 of RFC3530.
|
|
*/
|
|
if (status == -NFS4ERR_BAD_STATEID) {
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
if (status == -EAGAIN) {
|
|
/* We must have found a delegation */
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
|
|
continue;
|
|
res = ERR_PTR(nfs4_handle_exception(server,
|
|
status, &exception));
|
|
} while (exception.retry);
|
|
return res;
|
|
}
|
|
|
|
static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
|
|
struct nfs_fattr *fattr, struct iattr *sattr,
|
|
struct nfs4_state *state, struct nfs4_label *ilabel,
|
|
struct nfs4_label *olabel)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_setattrargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.iap = sattr,
|
|
.server = server,
|
|
.bitmask = server->attr_bitmask,
|
|
.label = ilabel,
|
|
};
|
|
struct nfs_setattrres res = {
|
|
.fattr = fattr,
|
|
.label = olabel,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long timestamp = jiffies;
|
|
fmode_t fmode;
|
|
bool truncate;
|
|
int status;
|
|
|
|
arg.bitmask = nfs4_bitmask(server, ilabel);
|
|
if (ilabel)
|
|
arg.bitmask = nfs4_bitmask(server, olabel);
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
/* Servers should only apply open mode checks for file size changes */
|
|
truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
|
|
fmode = truncate ? FMODE_WRITE : FMODE_READ;
|
|
|
|
if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
|
|
/* Use that stateid */
|
|
} else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
|
|
struct nfs_lockowner lockowner = {
|
|
.l_owner = current->files,
|
|
.l_pid = current->tgid,
|
|
};
|
|
nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
|
|
&lockowner);
|
|
} else
|
|
nfs4_stateid_copy(&arg.stateid, &zero_stateid);
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
if (status == 0 && state != NULL)
|
|
renew_lease(server, timestamp);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
|
|
struct nfs_fattr *fattr, struct iattr *sattr,
|
|
struct nfs4_state *state, struct nfs4_label *ilabel,
|
|
struct nfs4_label *olabel)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_exception exception = {
|
|
.state = state,
|
|
.inode = inode,
|
|
};
|
|
int err;
|
|
do {
|
|
err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
|
|
trace_nfs4_setattr(inode, err);
|
|
switch (err) {
|
|
case -NFS4ERR_OPENMODE:
|
|
if (!(sattr->ia_valid & ATTR_SIZE)) {
|
|
pr_warn_once("NFSv4: server %s is incorrectly "
|
|
"applying open mode checks to "
|
|
"a SETATTR that is not "
|
|
"changing file size.\n",
|
|
server->nfs_client->cl_hostname);
|
|
}
|
|
if (state && !(state->state & FMODE_WRITE)) {
|
|
err = -EBADF;
|
|
if (sattr->ia_valid & ATTR_OPEN)
|
|
err = -EACCES;
|
|
goto out;
|
|
}
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
struct nfs4_closedata {
|
|
struct inode *inode;
|
|
struct nfs4_state *state;
|
|
struct nfs_closeargs arg;
|
|
struct nfs_closeres res;
|
|
struct nfs_fattr fattr;
|
|
unsigned long timestamp;
|
|
bool roc;
|
|
u32 roc_barrier;
|
|
};
|
|
|
|
static void nfs4_free_closedata(void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state_owner *sp = calldata->state->owner;
|
|
struct super_block *sb = calldata->state->inode->i_sb;
|
|
|
|
if (calldata->roc)
|
|
pnfs_roc_release(calldata->state->inode);
|
|
nfs4_put_open_state(calldata->state);
|
|
nfs_free_seqid(calldata->arg.seqid);
|
|
nfs4_put_state_owner(sp);
|
|
nfs_sb_deactive(sb);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
|
|
fmode_t fmode)
|
|
{
|
|
spin_lock(&state->owner->so_lock);
|
|
clear_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
switch (fmode & (FMODE_READ|FMODE_WRITE)) {
|
|
case FMODE_WRITE:
|
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
break;
|
|
case FMODE_READ:
|
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
break;
|
|
case 0:
|
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
clear_bit(NFS_OPEN_STATE, &state->flags);
|
|
}
|
|
spin_unlock(&state->owner->so_lock);
|
|
}
|
|
|
|
static void nfs4_close_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state *state = calldata->state;
|
|
struct nfs_server *server = NFS_SERVER(calldata->inode);
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
if (!nfs4_sequence_done(task, &calldata->res.seq_res))
|
|
return;
|
|
trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
|
|
/* hmm. we are done with the inode, and in the process of freeing
|
|
* the state_owner. we keep this around to process errors
|
|
*/
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
if (calldata->roc)
|
|
pnfs_roc_set_barrier(state->inode,
|
|
calldata->roc_barrier);
|
|
nfs_set_open_stateid(state, &calldata->res.stateid, 0);
|
|
renew_lease(server, calldata->timestamp);
|
|
nfs4_close_clear_stateid_flags(state,
|
|
calldata->arg.fmode);
|
|
break;
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_OLD_STATEID:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
if (calldata->arg.fmode == 0)
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
|
|
rpc_restart_call_prepare(task);
|
|
}
|
|
nfs_release_seqid(calldata->arg.seqid);
|
|
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
|
|
dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
|
|
}
|
|
|
|
static void nfs4_close_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state *state = calldata->state;
|
|
struct inode *inode = calldata->inode;
|
|
int call_close = 0;
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
|
|
goto out_wait;
|
|
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
|
|
calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
|
|
spin_lock(&state->owner->so_lock);
|
|
/* Calculate the change in open mode */
|
|
if (state->n_rdwr == 0) {
|
|
if (state->n_rdonly == 0) {
|
|
call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
calldata->arg.fmode &= ~FMODE_READ;
|
|
}
|
|
if (state->n_wronly == 0) {
|
|
call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
calldata->arg.fmode &= ~FMODE_WRITE;
|
|
}
|
|
}
|
|
if (!nfs4_valid_open_stateid(state))
|
|
call_close = 0;
|
|
spin_unlock(&state->owner->so_lock);
|
|
|
|
if (!call_close) {
|
|
/* Note: exit _without_ calling nfs4_close_done */
|
|
goto out_no_action;
|
|
}
|
|
|
|
if (calldata->arg.fmode == 0) {
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
|
|
if (calldata->roc &&
|
|
pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
|
|
nfs_release_seqid(calldata->arg.seqid);
|
|
goto out_wait;
|
|
}
|
|
}
|
|
|
|
nfs_fattr_init(calldata->res.fattr);
|
|
calldata->timestamp = jiffies;
|
|
if (nfs4_setup_sequence(NFS_SERVER(inode),
|
|
&calldata->arg.seq_args,
|
|
&calldata->res.seq_res,
|
|
task) != 0)
|
|
nfs_release_seqid(calldata->arg.seqid);
|
|
dprintk("%s: done!\n", __func__);
|
|
return;
|
|
out_no_action:
|
|
task->tk_action = NULL;
|
|
out_wait:
|
|
nfs4_sequence_done(task, &calldata->res.seq_res);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_close_ops = {
|
|
.rpc_call_prepare = nfs4_close_prepare,
|
|
.rpc_call_done = nfs4_close_done,
|
|
.rpc_release = nfs4_free_closedata,
|
|
};
|
|
|
|
/*
|
|
* It is possible for data to be read/written from a mem-mapped file
|
|
* after the sys_close call (which hits the vfs layer as a flush).
|
|
* This means that we can't safely call nfsv4 close on a file until
|
|
* the inode is cleared. This in turn means that we are not good
|
|
* NFSv4 citizens - we do not indicate to the server to update the file's
|
|
* share state even when we are done with one of the three share
|
|
* stateid's in the inode.
|
|
*
|
|
* NOTE: Caller must be holding the sp->so_owner semaphore!
|
|
*/
|
|
int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_closedata *calldata;
|
|
struct nfs4_state_owner *sp = state->owner;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_close_ops,
|
|
.workqueue = nfsiod_workqueue,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
|
|
&task_setup_data.rpc_client, &msg);
|
|
|
|
calldata = kzalloc(sizeof(*calldata), gfp_mask);
|
|
if (calldata == NULL)
|
|
goto out;
|
|
nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
|
|
calldata->inode = state->inode;
|
|
calldata->state = state;
|
|
calldata->arg.fh = NFS_FH(state->inode);
|
|
calldata->arg.stateid = &state->open_stateid;
|
|
/* Serialization for the sequence id */
|
|
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
|
|
if (calldata->arg.seqid == NULL)
|
|
goto out_free_calldata;
|
|
calldata->arg.fmode = 0;
|
|
calldata->arg.bitmask = server->cache_consistency_bitmask;
|
|
calldata->res.fattr = &calldata->fattr;
|
|
calldata->res.seqid = calldata->arg.seqid;
|
|
calldata->res.server = server;
|
|
calldata->roc = pnfs_roc(state->inode);
|
|
nfs_sb_active(calldata->inode->i_sb);
|
|
|
|
msg.rpc_argp = &calldata->arg;
|
|
msg.rpc_resp = &calldata->res;
|
|
task_setup_data.callback_data = calldata;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = 0;
|
|
if (wait)
|
|
status = rpc_wait_for_completion_task(task);
|
|
rpc_put_task(task);
|
|
return status;
|
|
out_free_calldata:
|
|
kfree(calldata);
|
|
out:
|
|
nfs4_put_open_state(state);
|
|
nfs4_put_state_owner(sp);
|
|
return status;
|
|
}
|
|
|
|
static struct inode *
|
|
nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
|
|
int open_flags, struct iattr *attr, int *opened)
|
|
{
|
|
struct nfs4_state *state;
|
|
struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
|
|
|
|
label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
|
|
|
|
/* Protect against concurrent sillydeletes */
|
|
state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
|
|
|
|
nfs4_label_release_security(label);
|
|
|
|
if (IS_ERR(state))
|
|
return ERR_CAST(state);
|
|
return state->inode;
|
|
}
|
|
|
|
static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
|
|
{
|
|
if (ctx->state == NULL)
|
|
return;
|
|
if (is_sync)
|
|
nfs4_close_sync(ctx->state, ctx->mode);
|
|
else
|
|
nfs4_close_state(ctx->state, ctx->mode);
|
|
}
|
|
|
|
#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
|
|
#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
|
|
#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
|
|
|
|
static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
|
|
{
|
|
struct nfs4_server_caps_arg args = {
|
|
.fhandle = fhandle,
|
|
};
|
|
struct nfs4_server_caps_res res = {};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
if (status == 0) {
|
|
/* Sanity check the server answers */
|
|
switch (server->nfs_client->cl_minorversion) {
|
|
case 0:
|
|
res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
|
|
res.attr_bitmask[2] = 0;
|
|
break;
|
|
case 1:
|
|
res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
|
|
break;
|
|
case 2:
|
|
res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
|
|
}
|
|
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
|
|
server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
|
|
NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
|
|
NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
|
|
NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
|
|
NFS_CAP_CTIME|NFS_CAP_MTIME|
|
|
NFS_CAP_SECURITY_LABEL);
|
|
if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
|
|
server->caps |= NFS_CAP_ACLS;
|
|
if (res.has_links != 0)
|
|
server->caps |= NFS_CAP_HARDLINKS;
|
|
if (res.has_symlinks != 0)
|
|
server->caps |= NFS_CAP_SYMLINKS;
|
|
if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
|
|
server->caps |= NFS_CAP_FILEID;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
|
|
server->caps |= NFS_CAP_MODE;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
|
|
server->caps |= NFS_CAP_NLINK;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
|
|
server->caps |= NFS_CAP_OWNER;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
|
|
server->caps |= NFS_CAP_OWNER_GROUP;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
|
|
server->caps |= NFS_CAP_ATIME;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
|
|
server->caps |= NFS_CAP_CTIME;
|
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
|
|
server->caps |= NFS_CAP_MTIME;
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
|
|
if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
|
|
server->caps |= NFS_CAP_SECURITY_LABEL;
|
|
#endif
|
|
memcpy(server->attr_bitmask_nl, res.attr_bitmask,
|
|
sizeof(server->attr_bitmask));
|
|
server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
|
|
|
|
memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
|
|
server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
|
|
server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
|
|
server->cache_consistency_bitmask[2] = 0;
|
|
server->acl_bitmask = res.acl_bitmask;
|
|
server->fh_expire_type = res.fh_expire_type;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_server_capabilities(server, fhandle),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
u32 bitmask[3];
|
|
struct nfs4_lookup_root_arg args = {
|
|
.bitmask = bitmask,
|
|
};
|
|
struct nfs4_lookup_res res = {
|
|
.server = server,
|
|
.fattr = info->fattr,
|
|
.fh = fhandle,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
bitmask[0] = nfs4_fattr_bitmap[0];
|
|
bitmask[1] = nfs4_fattr_bitmap[1];
|
|
/*
|
|
* Process the label in the upcoming getfattr
|
|
*/
|
|
bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
|
|
|
|
nfs_fattr_init(info->fattr);
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_lookup_root(server, fhandle, info);
|
|
trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
|
|
switch (err) {
|
|
case 0:
|
|
case -NFS4ERR_WRONGSEC:
|
|
goto out;
|
|
default:
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
}
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info, rpc_authflavor_t flavor)
|
|
{
|
|
struct rpc_auth_create_args auth_args = {
|
|
.pseudoflavor = flavor,
|
|
};
|
|
struct rpc_auth *auth;
|
|
int ret;
|
|
|
|
auth = rpcauth_create(&auth_args, server->client);
|
|
if (IS_ERR(auth)) {
|
|
ret = -EACCES;
|
|
goto out;
|
|
}
|
|
ret = nfs4_lookup_root(server, fhandle, info);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Retry pseudoroot lookup with various security flavors. We do this when:
|
|
*
|
|
* NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
|
|
* NFSv4.1: the server does not support the SECINFO_NO_NAME operation
|
|
*
|
|
* Returns zero on success, or a negative NFS4ERR value, or a
|
|
* negative errno value.
|
|
*/
|
|
static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
/* Per 3530bis 15.33.5 */
|
|
static const rpc_authflavor_t flav_array[] = {
|
|
RPC_AUTH_GSS_KRB5P,
|
|
RPC_AUTH_GSS_KRB5I,
|
|
RPC_AUTH_GSS_KRB5,
|
|
RPC_AUTH_UNIX, /* courtesy */
|
|
RPC_AUTH_NULL,
|
|
};
|
|
int status = -EPERM;
|
|
size_t i;
|
|
|
|
if (server->auth_info.flavor_len > 0) {
|
|
/* try each flavor specified by user */
|
|
for (i = 0; i < server->auth_info.flavor_len; i++) {
|
|
status = nfs4_lookup_root_sec(server, fhandle, info,
|
|
server->auth_info.flavors[i]);
|
|
if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
|
|
continue;
|
|
break;
|
|
}
|
|
} else {
|
|
/* no flavors specified by user, try default list */
|
|
for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
|
|
status = nfs4_lookup_root_sec(server, fhandle, info,
|
|
flav_array[i]);
|
|
if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
|
|
continue;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* -EACCESS could mean that the user doesn't have correct permissions
|
|
* to access the mount. It could also mean that we tried to mount
|
|
* with a gss auth flavor, but rpc.gssd isn't running. Either way,
|
|
* existing mount programs don't handle -EACCES very well so it should
|
|
* be mapped to -EPERM instead.
|
|
*/
|
|
if (status == -EACCES)
|
|
status = -EPERM;
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_find_root_sec(struct nfs_server *server,
|
|
struct nfs_fh *fhandle, struct nfs_fsinfo *info)
|
|
{
|
|
int mv = server->nfs_client->cl_minorversion;
|
|
return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
|
|
}
|
|
|
|
/**
|
|
* nfs4_proc_get_rootfh - get file handle for server's pseudoroot
|
|
* @server: initialized nfs_server handle
|
|
* @fhandle: we fill in the pseudo-fs root file handle
|
|
* @info: we fill in an FSINFO struct
|
|
* @auth_probe: probe the auth flavours
|
|
*
|
|
* Returns zero on success, or a negative errno.
|
|
*/
|
|
int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info,
|
|
bool auth_probe)
|
|
{
|
|
int status;
|
|
|
|
switch (auth_probe) {
|
|
case false:
|
|
status = nfs4_lookup_root(server, fhandle, info);
|
|
if (status != -NFS4ERR_WRONGSEC)
|
|
break;
|
|
default:
|
|
status = nfs4_do_find_root_sec(server, fhandle, info);
|
|
}
|
|
|
|
if (status == 0)
|
|
status = nfs4_server_capabilities(server, fhandle);
|
|
if (status == 0)
|
|
status = nfs4_do_fsinfo(server, fhandle, info);
|
|
|
|
return nfs4_map_errors(status);
|
|
}
|
|
|
|
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
int error;
|
|
struct nfs_fattr *fattr = info->fattr;
|
|
struct nfs4_label *label = NULL;
|
|
|
|
error = nfs4_server_capabilities(server, mntfh);
|
|
if (error < 0) {
|
|
dprintk("nfs4_get_root: getcaps error = %d\n", -error);
|
|
return error;
|
|
}
|
|
|
|
label = nfs4_label_alloc(server, GFP_KERNEL);
|
|
if (IS_ERR(label))
|
|
return PTR_ERR(label);
|
|
|
|
error = nfs4_proc_getattr(server, mntfh, fattr, label);
|
|
if (error < 0) {
|
|
dprintk("nfs4_get_root: getattr error = %d\n", -error);
|
|
goto err_free_label;
|
|
}
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_FSID &&
|
|
!nfs_fsid_equal(&server->fsid, &fattr->fsid))
|
|
memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
|
|
|
|
err_free_label:
|
|
nfs4_label_free(label);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Get locations and (maybe) other attributes of a referral.
|
|
* Note that we'll actually follow the referral later when
|
|
* we detect fsid mismatch in inode revalidation
|
|
*/
|
|
static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
|
|
const struct qstr *name, struct nfs_fattr *fattr,
|
|
struct nfs_fh *fhandle)
|
|
{
|
|
int status = -ENOMEM;
|
|
struct page *page = NULL;
|
|
struct nfs4_fs_locations *locations = NULL;
|
|
|
|
page = alloc_page(GFP_KERNEL);
|
|
if (page == NULL)
|
|
goto out;
|
|
locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
|
|
if (locations == NULL)
|
|
goto out;
|
|
|
|
status = nfs4_proc_fs_locations(client, dir, name, locations, page);
|
|
if (status != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* If the fsid didn't change, this is a migration event, not a
|
|
* referral. Cause us to drop into the exception handler, which
|
|
* will kick off migration recovery.
|
|
*/
|
|
if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
|
|
dprintk("%s: server did not return a different fsid for"
|
|
" a referral at %s\n", __func__, name->name);
|
|
status = -NFS4ERR_MOVED;
|
|
goto out;
|
|
}
|
|
/* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
|
|
nfs_fixup_referral_attributes(&locations->fattr);
|
|
|
|
/* replace the lookup nfs_fattr with the locations nfs_fattr */
|
|
memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
|
|
memset(fhandle, 0, sizeof(struct nfs_fh));
|
|
out:
|
|
if (page)
|
|
__free_page(page);
|
|
kfree(locations);
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr, struct nfs4_label *label)
|
|
{
|
|
struct nfs4_getattr_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_getattr_res res = {
|
|
.fattr = fattr,
|
|
.label = label,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
args.bitmask = nfs4_bitmask(server, label);
|
|
|
|
nfs_fattr_init(fattr);
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr, struct nfs4_label *label)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_getattr(server, fhandle, fattr, label);
|
|
trace_nfs4_getattr(server, fhandle, fattr, err);
|
|
err = nfs4_handle_exception(server, err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* The file is not closed if it is opened due to the a request to change
|
|
* the size of the file. The open call will not be needed once the
|
|
* VFS layer lookup-intents are implemented.
|
|
*
|
|
* Close is called when the inode is destroyed.
|
|
* If we haven't opened the file for O_WRONLY, we
|
|
* need to in the size_change case to obtain a stateid.
|
|
*
|
|
* Got race?
|
|
* Because OPEN is always done by name in nfsv4, it is
|
|
* possible that we opened a different file by the same
|
|
* name. We can recognize this race condition, but we
|
|
* can't do anything about it besides returning an error.
|
|
*
|
|
* This will be fixed with VFS changes (lookup-intent).
|
|
*/
|
|
static int
|
|
nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
|
|
struct iattr *sattr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct rpc_cred *cred = NULL;
|
|
struct nfs4_state *state = NULL;
|
|
struct nfs4_label *label = NULL;
|
|
int status;
|
|
|
|
if (pnfs_ld_layoutret_on_setattr(inode))
|
|
pnfs_commit_and_return_layout(inode);
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
/* Deal with open(O_TRUNC) */
|
|
if (sattr->ia_valid & ATTR_OPEN)
|
|
sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
|
|
|
|
/* Optimization: if the end result is no change, don't RPC */
|
|
if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
|
|
return 0;
|
|
|
|
/* Search for an existing open(O_WRITE) file */
|
|
if (sattr->ia_valid & ATTR_FILE) {
|
|
struct nfs_open_context *ctx;
|
|
|
|
ctx = nfs_file_open_context(sattr->ia_file);
|
|
if (ctx) {
|
|
cred = ctx->cred;
|
|
state = ctx->state;
|
|
}
|
|
}
|
|
|
|
label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
|
|
if (IS_ERR(label))
|
|
return PTR_ERR(label);
|
|
|
|
status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
|
|
if (status == 0) {
|
|
nfs_setattr_update_inode(inode, sattr);
|
|
nfs_setsecurity(inode, fattr, label);
|
|
}
|
|
nfs4_label_free(label);
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
|
|
const struct qstr *name, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr, struct nfs4_label *label)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
int status;
|
|
struct nfs4_lookup_arg args = {
|
|
.bitmask = server->attr_bitmask,
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
};
|
|
struct nfs4_lookup_res res = {
|
|
.server = server,
|
|
.fattr = fattr,
|
|
.label = label,
|
|
.fh = fhandle,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
args.bitmask = nfs4_bitmask(server, label);
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
dprintk("NFS call lookup %s\n", name->name);
|
|
status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
dprintk("NFS reply lookup: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
|
|
{
|
|
fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
|
|
NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
|
|
fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
|
|
fattr->nlink = 2;
|
|
}
|
|
|
|
static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
|
|
struct qstr *name, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr, struct nfs4_label *label)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct rpc_clnt *client = *clnt;
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
|
|
trace_nfs4_lookup(dir, name, err);
|
|
switch (err) {
|
|
case -NFS4ERR_BADNAME:
|
|
err = -ENOENT;
|
|
goto out;
|
|
case -NFS4ERR_MOVED:
|
|
err = nfs4_get_referral(client, dir, name, fattr, fhandle);
|
|
goto out;
|
|
case -NFS4ERR_WRONGSEC:
|
|
err = -EPERM;
|
|
if (client != *clnt)
|
|
goto out;
|
|
client = nfs4_create_sec_client(client, dir, name);
|
|
if (IS_ERR(client))
|
|
return PTR_ERR(client);
|
|
|
|
exception.retry = 1;
|
|
break;
|
|
default:
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
|
|
}
|
|
} while (exception.retry);
|
|
|
|
out:
|
|
if (err == 0)
|
|
*clnt = client;
|
|
else if (client != *clnt)
|
|
rpc_shutdown_client(client);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
|
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr,
|
|
struct nfs4_label *label)
|
|
{
|
|
int status;
|
|
struct rpc_clnt *client = NFS_CLIENT(dir);
|
|
|
|
status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
|
|
if (client != NFS_CLIENT(dir)) {
|
|
rpc_shutdown_client(client);
|
|
nfs_fixup_secinfo_attributes(fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
struct rpc_clnt *
|
|
nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
|
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
struct rpc_clnt *client = NFS_CLIENT(dir);
|
|
int status;
|
|
|
|
status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
|
|
if (status < 0)
|
|
return ERR_PTR(status);
|
|
return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
|
|
}
|
|
|
|
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_accessargs args = {
|
|
.fh = NFS_FH(inode),
|
|
.bitmask = server->cache_consistency_bitmask,
|
|
};
|
|
struct nfs4_accessres res = {
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = entry->cred,
|
|
};
|
|
int mode = entry->mask;
|
|
int status = 0;
|
|
|
|
/*
|
|
* Determine which access bits we want to ask for...
|
|
*/
|
|
if (mode & MAY_READ)
|
|
args.access |= NFS4_ACCESS_READ;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (mode & MAY_WRITE)
|
|
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
|
|
if (mode & MAY_EXEC)
|
|
args.access |= NFS4_ACCESS_LOOKUP;
|
|
} else {
|
|
if (mode & MAY_WRITE)
|
|
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
|
|
if (mode & MAY_EXEC)
|
|
args.access |= NFS4_ACCESS_EXECUTE;
|
|
}
|
|
|
|
res.fattr = nfs_alloc_fattr();
|
|
if (res.fattr == NULL)
|
|
return -ENOMEM;
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
if (!status) {
|
|
nfs_access_set_mask(entry, res.access);
|
|
nfs_refresh_inode(inode, res.fattr);
|
|
}
|
|
nfs_free_fattr(res.fattr);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_access(inode, entry);
|
|
trace_nfs4_access(inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* TODO: For the time being, we don't try to get any attributes
|
|
* along with any of the zero-copy operations READ, READDIR,
|
|
* READLINK, WRITE.
|
|
*
|
|
* In the case of the first three, we want to put the GETATTR
|
|
* after the read-type operation -- this is because it is hard
|
|
* to predict the length of a GETATTR response in v4, and thus
|
|
* align the READ data correctly. This means that the GETATTR
|
|
* may end up partially falling into the page cache, and we should
|
|
* shift it into the 'tail' of the xdr_buf before processing.
|
|
* To do this efficiently, we need to know the total length
|
|
* of data received, which doesn't seem to be available outside
|
|
* of the RPC layer.
|
|
*
|
|
* In the case of WRITE, we also want to put the GETATTR after
|
|
* the operation -- in this case because we want to make sure
|
|
* we get the post-operation mtime and size.
|
|
*
|
|
* Both of these changes to the XDR layer would in fact be quite
|
|
* minor, but I decided to leave them for a subsequent patch.
|
|
*/
|
|
static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
|
|
unsigned int pgbase, unsigned int pglen)
|
|
{
|
|
struct nfs4_readlink args = {
|
|
.fh = NFS_FH(inode),
|
|
.pgbase = pgbase,
|
|
.pglen = pglen,
|
|
.pages = &page,
|
|
};
|
|
struct nfs4_readlink_res res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_proc_readlink(struct inode *inode, struct page *page,
|
|
unsigned int pgbase, unsigned int pglen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
|
|
trace_nfs4_readlink(inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This is just for mknod. open(O_CREAT) will always do ->open_context().
|
|
*/
|
|
static int
|
|
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
|
|
int flags)
|
|
{
|
|
struct nfs4_label l, *ilabel = NULL;
|
|
struct nfs_open_context *ctx;
|
|
struct nfs4_state *state;
|
|
int opened = 0;
|
|
int status = 0;
|
|
|
|
ctx = alloc_nfs_open_context(dentry, FMODE_READ);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
|
|
ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
|
|
|
|
sattr->ia_mode &= ~current_umask();
|
|
state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
|
|
if (IS_ERR(state)) {
|
|
status = PTR_ERR(state);
|
|
goto out;
|
|
}
|
|
out:
|
|
nfs4_label_release_security(ilabel);
|
|
put_nfs_open_context(ctx);
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_removeargs args = {
|
|
.fh = NFS_FH(dir),
|
|
.name = *name,
|
|
};
|
|
struct nfs_removeres res = {
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
|
|
if (status == 0)
|
|
update_changeattr(dir, &res.cinfo);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_remove(dir, name);
|
|
trace_nfs4_remove(dir, name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_removeargs *args = msg->rpc_argp;
|
|
struct nfs_removeres *res = msg->rpc_resp;
|
|
|
|
res->server = server;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
|
|
nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
|
|
|
|
nfs_fattr_init(res->dir_attr);
|
|
}
|
|
|
|
static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
|
|
{
|
|
nfs4_setup_sequence(NFS_SERVER(data->dir),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
|
|
{
|
|
struct nfs_unlinkdata *data = task->tk_calldata;
|
|
struct nfs_removeres *res = &data->res;
|
|
|
|
if (!nfs4_sequence_done(task, &res->seq_res))
|
|
return 0;
|
|
if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
|
|
return 0;
|
|
update_changeattr(dir, &res->cinfo);
|
|
return 1;
|
|
}
|
|
|
|
static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_renameargs *arg = msg->rpc_argp;
|
|
struct nfs_renameres *res = msg->rpc_resp;
|
|
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
|
|
res->server = server;
|
|
nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
|
|
}
|
|
|
|
static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
|
|
{
|
|
nfs4_setup_sequence(NFS_SERVER(data->old_dir),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
|
|
struct inode *new_dir)
|
|
{
|
|
struct nfs_renamedata *data = task->tk_calldata;
|
|
struct nfs_renameres *res = &data->res;
|
|
|
|
if (!nfs4_sequence_done(task, &res->seq_res))
|
|
return 0;
|
|
if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
|
|
return 0;
|
|
|
|
update_changeattr(old_dir, &res->old_cinfo);
|
|
update_changeattr(new_dir, &res->new_cinfo);
|
|
return 1;
|
|
}
|
|
|
|
static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
|
|
struct inode *new_dir, struct qstr *new_name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(old_dir);
|
|
struct nfs_renameargs arg = {
|
|
.old_dir = NFS_FH(old_dir),
|
|
.new_dir = NFS_FH(new_dir),
|
|
.old_name = old_name,
|
|
.new_name = new_name,
|
|
};
|
|
struct nfs_renameres res = {
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
if (!status) {
|
|
update_changeattr(old_dir, &res.old_cinfo);
|
|
update_changeattr(new_dir, &res.new_cinfo);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
|
|
struct inode *new_dir, struct qstr *new_name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_rename(old_dir, old_name,
|
|
new_dir, new_name);
|
|
trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_link_arg arg = {
|
|
.fh = NFS_FH(inode),
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_link_res res = {
|
|
.server = server,
|
|
.label = NULL,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
res.fattr = nfs_alloc_fattr();
|
|
if (res.fattr == NULL)
|
|
goto out;
|
|
|
|
res.label = nfs4_label_alloc(server, GFP_KERNEL);
|
|
if (IS_ERR(res.label)) {
|
|
status = PTR_ERR(res.label);
|
|
goto out;
|
|
}
|
|
arg.bitmask = nfs4_bitmask(server, res.label);
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
if (!status) {
|
|
update_changeattr(dir, &res.cinfo);
|
|
status = nfs_post_op_update_inode(inode, res.fattr);
|
|
if (!status)
|
|
nfs_setsecurity(inode, res.fattr, res.label);
|
|
}
|
|
|
|
|
|
nfs4_label_free(res.label);
|
|
|
|
out:
|
|
nfs_free_fattr(res.fattr);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(inode),
|
|
_nfs4_proc_link(inode, dir, name),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
struct nfs4_createdata {
|
|
struct rpc_message msg;
|
|
struct nfs4_create_arg arg;
|
|
struct nfs4_create_res res;
|
|
struct nfs_fh fh;
|
|
struct nfs_fattr fattr;
|
|
struct nfs4_label *label;
|
|
};
|
|
|
|
static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
|
|
struct qstr *name, struct iattr *sattr, u32 ftype)
|
|
{
|
|
struct nfs4_createdata *data;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (data != NULL) {
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
|
|
data->label = nfs4_label_alloc(server, GFP_KERNEL);
|
|
if (IS_ERR(data->label))
|
|
goto out_free;
|
|
|
|
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
|
|
data->msg.rpc_argp = &data->arg;
|
|
data->msg.rpc_resp = &data->res;
|
|
data->arg.dir_fh = NFS_FH(dir);
|
|
data->arg.server = server;
|
|
data->arg.name = name;
|
|
data->arg.attrs = sattr;
|
|
data->arg.ftype = ftype;
|
|
data->arg.bitmask = nfs4_bitmask(server, data->label);
|
|
data->res.server = server;
|
|
data->res.fh = &data->fh;
|
|
data->res.fattr = &data->fattr;
|
|
data->res.label = data->label;
|
|
nfs_fattr_init(data->res.fattr);
|
|
}
|
|
return data;
|
|
out_free:
|
|
kfree(data);
|
|
return NULL;
|
|
}
|
|
|
|
static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
|
|
{
|
|
int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
|
|
&data->arg.seq_args, &data->res.seq_res, 1);
|
|
if (status == 0) {
|
|
update_changeattr(dir, &data->res.dir_cinfo);
|
|
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static void nfs4_free_createdata(struct nfs4_createdata *data)
|
|
{
|
|
nfs4_label_free(data->label);
|
|
kfree(data);
|
|
}
|
|
|
|
static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
|
|
struct page *page, unsigned int len, struct iattr *sattr,
|
|
struct nfs4_label *label)
|
|
{
|
|
struct nfs4_createdata *data;
|
|
int status = -ENAMETOOLONG;
|
|
|
|
if (len > NFS4_MAXPATHLEN)
|
|
goto out;
|
|
|
|
status = -ENOMEM;
|
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
|
|
data->arg.u.symlink.pages = &page;
|
|
data->arg.u.symlink.len = len;
|
|
data->arg.label = label;
|
|
|
|
status = nfs4_do_create(dir, dentry, data);
|
|
|
|
nfs4_free_createdata(data);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
|
|
struct page *page, unsigned int len, struct iattr *sattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct nfs4_label l, *label = NULL;
|
|
int err;
|
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l);
|
|
|
|
do {
|
|
err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
|
|
trace_nfs4_symlink(dir, &dentry->d_name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
nfs4_label_release_security(label);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr, struct nfs4_label *label)
|
|
{
|
|
struct nfs4_createdata *data;
|
|
int status = -ENOMEM;
|
|
|
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
data->arg.label = label;
|
|
status = nfs4_do_create(dir, dentry, data);
|
|
|
|
nfs4_free_createdata(data);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct nfs4_label l, *label = NULL;
|
|
int err;
|
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l);
|
|
|
|
sattr->ia_mode &= ~current_umask();
|
|
do {
|
|
err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
|
|
trace_nfs4_mkdir(dir, &dentry->d_name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
nfs4_label_release_security(label);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
|
|
u64 cookie, struct page **pages, unsigned int count, int plus)
|
|
{
|
|
struct inode *dir = dentry->d_inode;
|
|
struct nfs4_readdir_arg args = {
|
|
.fh = NFS_FH(dir),
|
|
.pages = pages,
|
|
.pgbase = 0,
|
|
.count = count,
|
|
.bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
|
|
.plus = plus,
|
|
};
|
|
struct nfs4_readdir_res res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
|
|
dentry,
|
|
(unsigned long long)cookie);
|
|
nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
|
|
res.pgbase = args.pgbase;
|
|
status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
|
|
if (status >= 0) {
|
|
memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
|
|
status += args.pgbase;
|
|
}
|
|
|
|
nfs_invalidate_atime(dir);
|
|
|
|
dprintk("%s: returns %d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
|
|
u64 cookie, struct page **pages, unsigned int count, int plus)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_readdir(dentry, cred, cookie,
|
|
pages, count, plus);
|
|
trace_nfs4_readdir(dentry->d_inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
|
|
{
|
|
struct nfs4_createdata *data;
|
|
int mode = sattr->ia_mode;
|
|
int status = -ENOMEM;
|
|
|
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
if (S_ISFIFO(mode))
|
|
data->arg.ftype = NF4FIFO;
|
|
else if (S_ISBLK(mode)) {
|
|
data->arg.ftype = NF4BLK;
|
|
data->arg.u.device.specdata1 = MAJOR(rdev);
|
|
data->arg.u.device.specdata2 = MINOR(rdev);
|
|
}
|
|
else if (S_ISCHR(mode)) {
|
|
data->arg.ftype = NF4CHR;
|
|
data->arg.u.device.specdata1 = MAJOR(rdev);
|
|
data->arg.u.device.specdata2 = MINOR(rdev);
|
|
} else if (!S_ISSOCK(mode)) {
|
|
status = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
data->arg.label = label;
|
|
status = nfs4_do_create(dir, dentry, data);
|
|
out_free:
|
|
nfs4_free_createdata(data);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr, dev_t rdev)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct nfs4_label l, *label = NULL;
|
|
int err;
|
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l);
|
|
|
|
sattr->ia_mode &= ~current_umask();
|
|
do {
|
|
err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
|
|
trace_nfs4_mknod(dir, &dentry->d_name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
nfs4_label_release_security(label);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsstat *fsstat)
|
|
{
|
|
struct nfs4_statfs_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_statfs_res res = {
|
|
.fsstat = fsstat,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
nfs_fattr_init(fsstat->fattr);
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_statfs(server, fhandle, fsstat),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *fsinfo)
|
|
{
|
|
struct nfs4_fsinfo_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_fsinfo_res res = {
|
|
.fsinfo = fsinfo,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
unsigned long now = jiffies;
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
|
|
trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
|
|
if (err == 0) {
|
|
struct nfs_client *clp = server->nfs_client;
|
|
|
|
spin_lock(&clp->cl_lock);
|
|
clp->cl_lease_time = fsinfo->lease_time * HZ;
|
|
clp->cl_last_renewal = now;
|
|
spin_unlock(&clp->cl_lock);
|
|
break;
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
|
|
{
|
|
int error;
|
|
|
|
nfs_fattr_init(fsinfo->fattr);
|
|
error = nfs4_do_fsinfo(server, fhandle, fsinfo);
|
|
if (error == 0) {
|
|
/* block layout checks this! */
|
|
server->pnfs_blksize = fsinfo->blksize;
|
|
set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_pathconf *pathconf)
|
|
{
|
|
struct nfs4_pathconf_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_pathconf_res res = {
|
|
.pathconf = pathconf,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
/* None of the pathconf attributes are mandatory to implement */
|
|
if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
|
|
memset(pathconf, 0, sizeof(*pathconf));
|
|
return 0;
|
|
}
|
|
|
|
nfs_fattr_init(pathconf->fattr);
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_pathconf *pathconf)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_pathconf(server, fhandle, pathconf),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
int nfs4_set_rw_stateid(nfs4_stateid *stateid,
|
|
const struct nfs_open_context *ctx,
|
|
const struct nfs_lock_context *l_ctx,
|
|
fmode_t fmode)
|
|
{
|
|
const struct nfs_lockowner *lockowner = NULL;
|
|
|
|
if (l_ctx != NULL)
|
|
lockowner = &l_ctx->lockowner;
|
|
return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
|
|
|
|
static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
|
|
const struct nfs_open_context *ctx,
|
|
const struct nfs_lock_context *l_ctx,
|
|
fmode_t fmode)
|
|
{
|
|
nfs4_stateid current_stateid;
|
|
|
|
if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode))
|
|
return false;
|
|
return nfs4_stateid_match(stateid, ¤t_stateid);
|
|
}
|
|
|
|
static bool nfs4_error_stateid_expired(int err)
|
|
{
|
|
switch (err) {
|
|
case -NFS4ERR_DELEG_REVOKED:
|
|
case -NFS4ERR_ADMIN_REVOKED:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_OLD_STATEID:
|
|
case -NFS4ERR_OPENMODE:
|
|
case -NFS4ERR_EXPIRED:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void __nfs4_read_done_cb(struct nfs_read_data *data)
|
|
{
|
|
nfs_invalidate_atime(data->header->inode);
|
|
}
|
|
|
|
static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->header->inode);
|
|
|
|
trace_nfs4_read(data, task->tk_status);
|
|
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
__nfs4_read_done_cb(data);
|
|
if (task->tk_status > 0)
|
|
renew_lease(server, data->timestamp);
|
|
return 0;
|
|
}
|
|
|
|
static bool nfs4_read_stateid_changed(struct rpc_task *task,
|
|
struct nfs_readargs *args)
|
|
{
|
|
|
|
if (!nfs4_error_stateid_expired(task->tk_status) ||
|
|
nfs4_stateid_is_current(&args->stateid,
|
|
args->context,
|
|
args->lock_context,
|
|
FMODE_READ))
|
|
return false;
|
|
rpc_restart_call_prepare(task);
|
|
return true;
|
|
}
|
|
|
|
static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
|
|
{
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return -EAGAIN;
|
|
if (nfs4_read_stateid_changed(task, &data->args))
|
|
return -EAGAIN;
|
|
return data->read_done_cb ? data->read_done_cb(task, data) :
|
|
nfs4_read_done_cb(task, data);
|
|
}
|
|
|
|
static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
|
|
{
|
|
data->timestamp = jiffies;
|
|
data->read_done_cb = nfs4_read_done_cb;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
|
|
}
|
|
|
|
static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
|
|
{
|
|
if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task))
|
|
return 0;
|
|
if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
|
|
data->args.lock_context, FMODE_READ) == -EIO)
|
|
return -EIO;
|
|
if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
|
|
{
|
|
struct inode *inode = data->header->inode;
|
|
|
|
trace_nfs4_write(data, task->tk_status);
|
|
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return -EAGAIN;
|
|
}
|
|
if (task->tk_status >= 0) {
|
|
renew_lease(NFS_SERVER(inode), data->timestamp);
|
|
nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool nfs4_write_stateid_changed(struct rpc_task *task,
|
|
struct nfs_writeargs *args)
|
|
{
|
|
|
|
if (!nfs4_error_stateid_expired(task->tk_status) ||
|
|
nfs4_stateid_is_current(&args->stateid,
|
|
args->context,
|
|
args->lock_context,
|
|
FMODE_WRITE))
|
|
return false;
|
|
rpc_restart_call_prepare(task);
|
|
return true;
|
|
}
|
|
|
|
static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
|
|
{
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return -EAGAIN;
|
|
if (nfs4_write_stateid_changed(task, &data->args))
|
|
return -EAGAIN;
|
|
return data->write_done_cb ? data->write_done_cb(task, data) :
|
|
nfs4_write_done_cb(task, data);
|
|
}
|
|
|
|
static
|
|
bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
|
|
{
|
|
const struct nfs_pgio_header *hdr = data->header;
|
|
|
|
/* Don't request attributes for pNFS or O_DIRECT writes */
|
|
if (data->ds_clp != NULL || hdr->dreq != NULL)
|
|
return false;
|
|
/* Otherwise, request attributes if and only if we don't hold
|
|
* a delegation
|
|
*/
|
|
return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
|
|
}
|
|
|
|
static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->header->inode);
|
|
|
|
if (!nfs4_write_need_cache_consistency_data(data)) {
|
|
data->args.bitmask = NULL;
|
|
data->res.fattr = NULL;
|
|
} else
|
|
data->args.bitmask = server->cache_consistency_bitmask;
|
|
|
|
if (!data->write_done_cb)
|
|
data->write_done_cb = nfs4_write_done_cb;
|
|
data->res.server = server;
|
|
data->timestamp = jiffies;
|
|
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
|
|
}
|
|
|
|
static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
|
|
{
|
|
if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task))
|
|
return 0;
|
|
if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
|
|
data->args.lock_context, FMODE_WRITE) == -EIO)
|
|
return -EIO;
|
|
if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
|
|
{
|
|
nfs4_setup_sequence(NFS_SERVER(data->inode),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
|
|
{
|
|
struct inode *inode = data->inode;
|
|
|
|
trace_nfs4_commit(data, task->tk_status);
|
|
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return -EAGAIN;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
|
|
{
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return -EAGAIN;
|
|
return data->commit_done_cb(task, data);
|
|
}
|
|
|
|
static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->inode);
|
|
|
|
if (data->commit_done_cb == NULL)
|
|
data->commit_done_cb = nfs4_commit_done_cb;
|
|
data->res.server = server;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
|
|
}
|
|
|
|
struct nfs4_renewdata {
|
|
struct nfs_client *client;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
/*
|
|
* nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
|
|
* standalone procedure for queueing an asynchronous RENEW.
|
|
*/
|
|
static void nfs4_renew_release(void *calldata)
|
|
{
|
|
struct nfs4_renewdata *data = calldata;
|
|
struct nfs_client *clp = data->client;
|
|
|
|
if (atomic_read(&clp->cl_count) > 1)
|
|
nfs4_schedule_state_renewal(clp);
|
|
nfs_put_client(clp);
|
|
kfree(data);
|
|
}
|
|
|
|
static void nfs4_renew_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_renewdata *data = calldata;
|
|
struct nfs_client *clp = data->client;
|
|
unsigned long timestamp = data->timestamp;
|
|
|
|
trace_nfs4_renew_async(clp, task->tk_status);
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
break;
|
|
case -NFS4ERR_LEASE_MOVED:
|
|
nfs4_schedule_lease_moved_recovery(clp);
|
|
break;
|
|
default:
|
|
/* Unless we're shutting down, schedule state recovery! */
|
|
if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
|
|
return;
|
|
if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
|
|
nfs4_schedule_lease_recovery(clp);
|
|
return;
|
|
}
|
|
nfs4_schedule_path_down_recovery(clp);
|
|
}
|
|
do_renew_lease(clp, timestamp);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_renew_ops = {
|
|
.rpc_call_done = nfs4_renew_done,
|
|
.rpc_release = nfs4_renew_release,
|
|
};
|
|
|
|
static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
|
|
.rpc_argp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
struct nfs4_renewdata *data;
|
|
|
|
if (renew_flags == 0)
|
|
return 0;
|
|
if (!atomic_inc_not_zero(&clp->cl_count))
|
|
return -EIO;
|
|
data = kmalloc(sizeof(*data), GFP_NOFS);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
data->client = clp;
|
|
data->timestamp = jiffies;
|
|
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
|
|
&nfs4_renew_ops, data);
|
|
}
|
|
|
|
static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
|
|
.rpc_argp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long now = jiffies;
|
|
int status;
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
if (status < 0)
|
|
return status;
|
|
do_renew_lease(clp, now);
|
|
return 0;
|
|
}
|
|
|
|
static inline int nfs4_server_supports_acls(struct nfs_server *server)
|
|
{
|
|
return (server->caps & NFS_CAP_ACLS)
|
|
&& (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
|
|
&& (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
|
|
}
|
|
|
|
/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
|
|
* it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
|
|
* the stack.
|
|
*/
|
|
#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
|
|
|
|
static int buf_to_pages_noslab(const void *buf, size_t buflen,
|
|
struct page **pages, unsigned int *pgbase)
|
|
{
|
|
struct page *newpage, **spages;
|
|
int rc = 0;
|
|
size_t len;
|
|
spages = pages;
|
|
|
|
do {
|
|
len = min_t(size_t, PAGE_SIZE, buflen);
|
|
newpage = alloc_page(GFP_KERNEL);
|
|
|
|
if (newpage == NULL)
|
|
goto unwind;
|
|
memcpy(page_address(newpage), buf, len);
|
|
buf += len;
|
|
buflen -= len;
|
|
*pages++ = newpage;
|
|
rc++;
|
|
} while (buflen != 0);
|
|
|
|
return rc;
|
|
|
|
unwind:
|
|
for(; rc > 0; rc--)
|
|
__free_page(spages[rc-1]);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
struct nfs4_cached_acl {
|
|
int cached;
|
|
size_t len;
|
|
char data[0];
|
|
};
|
|
|
|
static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
kfree(nfsi->nfs4_acl);
|
|
nfsi->nfs4_acl = acl;
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
|
|
static void nfs4_zap_acl_attr(struct inode *inode)
|
|
{
|
|
nfs4_set_cached_acl(inode, NULL);
|
|
}
|
|
|
|
static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct nfs4_cached_acl *acl;
|
|
int ret = -ENOENT;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
acl = nfsi->nfs4_acl;
|
|
if (acl == NULL)
|
|
goto out;
|
|
if (buf == NULL) /* user is just asking for length */
|
|
goto out_len;
|
|
if (acl->cached == 0)
|
|
goto out;
|
|
ret = -ERANGE; /* see getxattr(2) man page */
|
|
if (acl->len > buflen)
|
|
goto out;
|
|
memcpy(buf, acl->data, acl->len);
|
|
out_len:
|
|
ret = acl->len;
|
|
out:
|
|
spin_unlock(&inode->i_lock);
|
|
return ret;
|
|
}
|
|
|
|
static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
|
|
{
|
|
struct nfs4_cached_acl *acl;
|
|
size_t buflen = sizeof(*acl) + acl_len;
|
|
|
|
if (buflen <= PAGE_SIZE) {
|
|
acl = kmalloc(buflen, GFP_KERNEL);
|
|
if (acl == NULL)
|
|
goto out;
|
|
acl->cached = 1;
|
|
_copy_from_pages(acl->data, pages, pgbase, acl_len);
|
|
} else {
|
|
acl = kmalloc(sizeof(*acl), GFP_KERNEL);
|
|
if (acl == NULL)
|
|
goto out;
|
|
acl->cached = 0;
|
|
}
|
|
acl->len = acl_len;
|
|
out:
|
|
nfs4_set_cached_acl(inode, acl);
|
|
}
|
|
|
|
/*
|
|
* The getxattr API returns the required buffer length when called with a
|
|
* NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
|
|
* the required buf. On a NULL buf, we send a page of data to the server
|
|
* guessing that the ACL request can be serviced by a page. If so, we cache
|
|
* up to the page of ACL data, and the 2nd call to getxattr is serviced by
|
|
* the cache. If not so, we throw away the page, and cache the required
|
|
* length. The next getxattr call will then produce another round trip to
|
|
* the server, this time with the input buf of the required size.
|
|
*/
|
|
static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
|
|
struct nfs_getaclargs args = {
|
|
.fh = NFS_FH(inode),
|
|
.acl_pages = pages,
|
|
.acl_len = buflen,
|
|
};
|
|
struct nfs_getaclres res = {
|
|
.acl_len = buflen,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
|
|
int ret = -ENOMEM, i;
|
|
|
|
/* As long as we're doing a round trip to the server anyway,
|
|
* let's be prepared for a page of acl data. */
|
|
if (npages == 0)
|
|
npages = 1;
|
|
if (npages > ARRAY_SIZE(pages))
|
|
return -ERANGE;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
pages[i] = alloc_page(GFP_KERNEL);
|
|
if (!pages[i])
|
|
goto out_free;
|
|
}
|
|
|
|
/* for decoding across pages */
|
|
res.acl_scratch = alloc_page(GFP_KERNEL);
|
|
if (!res.acl_scratch)
|
|
goto out_free;
|
|
|
|
args.acl_len = npages * PAGE_SIZE;
|
|
args.acl_pgbase = 0;
|
|
|
|
dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
|
|
__func__, buf, buflen, npages, args.acl_len);
|
|
ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
|
|
&msg, &args.seq_args, &res.seq_res, 0);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
/* Handle the case where the passed-in buffer is too short */
|
|
if (res.acl_flags & NFS4_ACL_TRUNC) {
|
|
/* Did the user only issue a request for the acl length? */
|
|
if (buf == NULL)
|
|
goto out_ok;
|
|
ret = -ERANGE;
|
|
goto out_free;
|
|
}
|
|
nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
|
|
if (buf) {
|
|
if (res.acl_len > buflen) {
|
|
ret = -ERANGE;
|
|
goto out_free;
|
|
}
|
|
_copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
|
|
}
|
|
out_ok:
|
|
ret = res.acl_len;
|
|
out_free:
|
|
for (i = 0; i < npages; i++)
|
|
if (pages[i])
|
|
__free_page(pages[i]);
|
|
if (res.acl_scratch)
|
|
__free_page(res.acl_scratch);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
ssize_t ret;
|
|
do {
|
|
ret = __nfs4_get_acl_uncached(inode, buf, buflen);
|
|
trace_nfs4_get_acl(inode, ret);
|
|
if (ret >= 0)
|
|
break;
|
|
ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
|
|
} while (exception.retry);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
int ret;
|
|
|
|
if (!nfs4_server_supports_acls(server))
|
|
return -EOPNOTSUPP;
|
|
ret = nfs_revalidate_inode(server, inode);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
|
|
nfs_zap_acl_cache(inode);
|
|
ret = nfs4_read_cached_acl(inode, buf, buflen);
|
|
if (ret != -ENOENT)
|
|
/* -ENOENT is returned if there is no ACL or if there is an ACL
|
|
* but no cached acl data, just the acl length */
|
|
return ret;
|
|
return nfs4_get_acl_uncached(inode, buf, buflen);
|
|
}
|
|
|
|
static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct page *pages[NFS4ACL_MAXPAGES];
|
|
struct nfs_setaclargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.acl_pages = pages,
|
|
.acl_len = buflen,
|
|
};
|
|
struct nfs_setaclres res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
|
|
int ret, i;
|
|
|
|
if (!nfs4_server_supports_acls(server))
|
|
return -EOPNOTSUPP;
|
|
if (npages > ARRAY_SIZE(pages))
|
|
return -ERANGE;
|
|
i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
|
|
if (i < 0)
|
|
return i;
|
|
nfs4_inode_return_delegation(inode);
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
|
|
/*
|
|
* Free each page after tx, so the only ref left is
|
|
* held by the network stack
|
|
*/
|
|
for (; i > 0; i--)
|
|
put_page(pages[i-1]);
|
|
|
|
/*
|
|
* Acl update can result in inode attribute update.
|
|
* so mark the attribute cache invalid.
|
|
*/
|
|
spin_lock(&inode->i_lock);
|
|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
|
|
spin_unlock(&inode->i_lock);
|
|
nfs_access_zap_cache(inode);
|
|
nfs_zap_acl_cache(inode);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = __nfs4_proc_set_acl(inode, buf, buflen);
|
|
trace_nfs4_set_acl(inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
|
|
static int _nfs4_get_security_label(struct inode *inode, void *buf,
|
|
size_t buflen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_fattr fattr;
|
|
struct nfs4_label label = {0, 0, buflen, buf};
|
|
|
|
u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
|
|
struct nfs4_getattr_arg arg = {
|
|
.fh = NFS_FH(inode),
|
|
.bitmask = bitmask,
|
|
};
|
|
struct nfs4_getattr_res res = {
|
|
.fattr = &fattr,
|
|
.label = &label,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int ret;
|
|
|
|
nfs_fattr_init(&fattr);
|
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
|
|
if (ret)
|
|
return ret;
|
|
if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
|
|
return -ENOENT;
|
|
if (buflen < label.len)
|
|
return -ERANGE;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_get_security_label(struct inode *inode, void *buf,
|
|
size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
|
|
return -EOPNOTSUPP;
|
|
|
|
do {
|
|
err = _nfs4_get_security_label(inode, buf, buflen);
|
|
trace_nfs4_get_security_label(inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_do_set_security_label(struct inode *inode,
|
|
struct nfs4_label *ilabel,
|
|
struct nfs_fattr *fattr,
|
|
struct nfs4_label *olabel)
|
|
{
|
|
|
|
struct iattr sattr = {0};
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
|
|
struct nfs_setattrargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.iap = &sattr,
|
|
.server = server,
|
|
.bitmask = bitmask,
|
|
.label = ilabel,
|
|
};
|
|
struct nfs_setattrres res = {
|
|
.fattr = fattr,
|
|
.label = olabel,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
nfs4_stateid_copy(&arg.stateid, &zero_stateid);
|
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
if (status)
|
|
dprintk("%s failed: %d\n", __func__, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_set_security_label(struct inode *inode,
|
|
struct nfs4_label *ilabel,
|
|
struct nfs_fattr *fattr,
|
|
struct nfs4_label *olabel)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_do_set_security_label(inode, ilabel,
|
|
fattr, olabel);
|
|
trace_nfs4_set_security_label(inode, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_label ilabel, *olabel = NULL;
|
|
struct nfs_fattr fattr;
|
|
struct rpc_cred *cred;
|
|
struct inode *inode = dentry->d_inode;
|
|
int status;
|
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
|
|
return -EOPNOTSUPP;
|
|
|
|
nfs_fattr_init(&fattr);
|
|
|
|
ilabel.pi = 0;
|
|
ilabel.lfs = 0;
|
|
ilabel.label = (char *)buf;
|
|
ilabel.len = buflen;
|
|
|
|
cred = rpc_lookup_cred();
|
|
if (IS_ERR(cred))
|
|
return PTR_ERR(cred);
|
|
|
|
olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
|
|
if (IS_ERR(olabel)) {
|
|
status = -PTR_ERR(olabel);
|
|
goto out;
|
|
}
|
|
|
|
status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
|
|
if (status == 0)
|
|
nfs_setsecurity(inode, &fattr, olabel);
|
|
|
|
nfs4_label_free(olabel);
|
|
out:
|
|
put_rpccred(cred);
|
|
return status;
|
|
}
|
|
#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
|
|
|
|
|
|
static int
|
|
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
|
|
if (task->tk_status >= 0)
|
|
return 0;
|
|
switch(task->tk_status) {
|
|
case -NFS4ERR_DELEG_REVOKED:
|
|
case -NFS4ERR_ADMIN_REVOKED:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
if (state == NULL)
|
|
break;
|
|
nfs_remove_bad_delegation(state->inode);
|
|
case -NFS4ERR_OPENMODE:
|
|
if (state == NULL)
|
|
break;
|
|
if (nfs4_schedule_stateid_recovery(server, state) < 0)
|
|
goto recovery_failed;
|
|
goto wait_on_recovery;
|
|
case -NFS4ERR_EXPIRED:
|
|
if (state != NULL) {
|
|
if (nfs4_schedule_stateid_recovery(server, state) < 0)
|
|
goto recovery_failed;
|
|
}
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
nfs4_schedule_lease_recovery(clp);
|
|
goto wait_on_recovery;
|
|
case -NFS4ERR_MOVED:
|
|
if (nfs4_schedule_migration_recovery(server) < 0)
|
|
goto recovery_failed;
|
|
goto wait_on_recovery;
|
|
case -NFS4ERR_LEASE_MOVED:
|
|
nfs4_schedule_lease_moved_recovery(clp);
|
|
goto wait_on_recovery;
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
case -NFS4ERR_BADSESSION:
|
|
case -NFS4ERR_BADSLOT:
|
|
case -NFS4ERR_BAD_HIGH_SLOT:
|
|
case -NFS4ERR_DEADSESSION:
|
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
|
|
case -NFS4ERR_SEQ_FALSE_RETRY:
|
|
case -NFS4ERR_SEQ_MISORDERED:
|
|
dprintk("%s ERROR %d, Reset session\n", __func__,
|
|
task->tk_status);
|
|
nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
|
|
goto restart_call;
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
case -NFS4ERR_DELAY:
|
|
nfs_inc_server_stats(server, NFSIOS_DELAY);
|
|
case -NFS4ERR_GRACE:
|
|
rpc_delay(task, NFS4_POLL_RETRY_MAX);
|
|
case -NFS4ERR_RETRY_UNCACHED_REP:
|
|
case -NFS4ERR_OLD_STATEID:
|
|
goto restart_call;
|
|
}
|
|
task->tk_status = nfs4_map_errors(task->tk_status);
|
|
return 0;
|
|
recovery_failed:
|
|
task->tk_status = -EIO;
|
|
return 0;
|
|
wait_on_recovery:
|
|
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
|
|
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
|
|
rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
|
|
if (test_bit(NFS_MIG_FAILED, &server->mig_status))
|
|
goto recovery_failed;
|
|
restart_call:
|
|
task->tk_status = 0;
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static void nfs4_init_boot_verifier(const struct nfs_client *clp,
|
|
nfs4_verifier *bootverf)
|
|
{
|
|
__be32 verf[2];
|
|
|
|
if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
|
|
/* An impossible timestamp guarantees this value
|
|
* will never match a generated boot time. */
|
|
verf[0] = 0;
|
|
verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
|
|
} else {
|
|
struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
|
|
verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
|
|
verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
|
|
}
|
|
memcpy(bootverf->data, verf, sizeof(bootverf->data));
|
|
}
|
|
|
|
static unsigned int
|
|
nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
|
|
char *buf, size_t len)
|
|
{
|
|
unsigned int result;
|
|
|
|
rcu_read_lock();
|
|
result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
|
|
clp->cl_ipaddr,
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_ADDR),
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_PROTO));
|
|
rcu_read_unlock();
|
|
return result;
|
|
}
|
|
|
|
static unsigned int
|
|
nfs4_init_uniform_client_string(const struct nfs_client *clp,
|
|
char *buf, size_t len)
|
|
{
|
|
const char *nodename = clp->cl_rpcclient->cl_nodename;
|
|
|
|
if (nfs4_client_id_uniquifier[0] != '\0')
|
|
return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
|
|
clp->rpc_ops->version,
|
|
clp->cl_minorversion,
|
|
nfs4_client_id_uniquifier,
|
|
nodename);
|
|
return scnprintf(buf, len, "Linux NFSv%u.%u %s",
|
|
clp->rpc_ops->version, clp->cl_minorversion,
|
|
nodename);
|
|
}
|
|
|
|
/**
|
|
* nfs4_proc_setclientid - Negotiate client ID
|
|
* @clp: state data structure
|
|
* @program: RPC program for NFSv4 callback service
|
|
* @port: IP port number for NFS4 callback service
|
|
* @cred: RPC credential to use for this call
|
|
* @res: where to place the result
|
|
*
|
|
* Returns zero, a negative errno, or a negative NFS4ERR status code.
|
|
*/
|
|
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
|
|
unsigned short port, struct rpc_cred *cred,
|
|
struct nfs4_setclientid_res *res)
|
|
{
|
|
nfs4_verifier sc_verifier;
|
|
struct nfs4_setclientid setclientid = {
|
|
.sc_verifier = &sc_verifier,
|
|
.sc_prog = program,
|
|
.sc_cb_ident = clp->cl_cb_ident,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
|
|
.rpc_argp = &setclientid,
|
|
.rpc_resp = res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
/* nfs_client_id4 */
|
|
nfs4_init_boot_verifier(clp, &sc_verifier);
|
|
if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
|
|
setclientid.sc_name_len =
|
|
nfs4_init_uniform_client_string(clp,
|
|
setclientid.sc_name,
|
|
sizeof(setclientid.sc_name));
|
|
else
|
|
setclientid.sc_name_len =
|
|
nfs4_init_nonuniform_client_string(clp,
|
|
setclientid.sc_name,
|
|
sizeof(setclientid.sc_name));
|
|
/* cb_client4 */
|
|
rcu_read_lock();
|
|
setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
|
|
sizeof(setclientid.sc_netid), "%s",
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_NETID));
|
|
rcu_read_unlock();
|
|
setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
|
|
sizeof(setclientid.sc_uaddr), "%s.%u.%u",
|
|
clp->cl_ipaddr, port >> 8, port & 255);
|
|
|
|
dprintk("NFS call setclientid auth=%s, '%.*s'\n",
|
|
clp->cl_rpcclient->cl_auth->au_ops->au_name,
|
|
setclientid.sc_name_len, setclientid.sc_name);
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_setclientid(clp, status);
|
|
dprintk("NFS reply setclientid: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* nfs4_proc_setclientid_confirm - Confirm client ID
|
|
* @clp: state data structure
|
|
* @res: result of a previous SETCLIENTID
|
|
* @cred: RPC credential to use for this call
|
|
*
|
|
* Returns zero, a negative errno, or a negative NFS4ERR status code.
|
|
*/
|
|
int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
|
|
struct nfs4_setclientid_res *arg,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
|
|
.rpc_argp = arg,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
|
|
clp->cl_rpcclient->cl_auth->au_ops->au_name,
|
|
clp->cl_clientid);
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_setclientid_confirm(clp, status);
|
|
dprintk("NFS reply setclientid_confirm: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
struct nfs4_delegreturndata {
|
|
struct nfs4_delegreturnargs args;
|
|
struct nfs4_delegreturnres res;
|
|
struct nfs_fh fh;
|
|
nfs4_stateid stateid;
|
|
unsigned long timestamp;
|
|
struct nfs_fattr fattr;
|
|
int rpc_status;
|
|
};
|
|
|
|
static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_delegreturndata *data = calldata;
|
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return;
|
|
|
|
trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
|
|
switch (task->tk_status) {
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
case 0:
|
|
renew_lease(data->res.server, data->timestamp);
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, data->res.server, NULL) ==
|
|
-EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
}
|
|
data->rpc_status = task->tk_status;
|
|
}
|
|
|
|
static void nfs4_delegreturn_release(void *calldata)
|
|
{
|
|
kfree(calldata);
|
|
}
|
|
|
|
static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_delegreturndata *d_data;
|
|
|
|
d_data = (struct nfs4_delegreturndata *)data;
|
|
|
|
nfs4_setup_sequence(d_data->res.server,
|
|
&d_data->args.seq_args,
|
|
&d_data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_delegreturn_ops = {
|
|
.rpc_call_prepare = nfs4_delegreturn_prepare,
|
|
.rpc_call_done = nfs4_delegreturn_done,
|
|
.rpc_release = nfs4_delegreturn_release,
|
|
};
|
|
|
|
static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
|
|
{
|
|
struct nfs4_delegreturndata *data;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_delegreturn_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status = 0;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_NOFS);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
|
|
data->args.fhandle = &data->fh;
|
|
data->args.stateid = &data->stateid;
|
|
data->args.bitmask = server->cache_consistency_bitmask;
|
|
nfs_copy_fh(&data->fh, NFS_FH(inode));
|
|
nfs4_stateid_copy(&data->stateid, stateid);
|
|
data->res.fattr = &data->fattr;
|
|
data->res.server = server;
|
|
nfs_fattr_init(data->res.fattr);
|
|
data->timestamp = jiffies;
|
|
data->rpc_status = 0;
|
|
|
|
task_setup_data.callback_data = data;
|
|
msg.rpc_argp = &data->args;
|
|
msg.rpc_resp = &data->res;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
if (!issync)
|
|
goto out;
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0)
|
|
goto out;
|
|
status = data->rpc_status;
|
|
if (status == 0)
|
|
nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
|
|
else
|
|
nfs_refresh_inode(inode, &data->fattr);
|
|
out:
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
|
|
trace_nfs4_delegreturn(inode, err);
|
|
switch (err) {
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
case 0:
|
|
return 0;
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
|
|
#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
|
|
|
|
/*
|
|
* sleep, with exponential backoff, and retry the LOCK operation.
|
|
*/
|
|
static unsigned long
|
|
nfs4_set_lock_task_retry(unsigned long timeout)
|
|
{
|
|
freezable_schedule_timeout_killable_unsafe(timeout);
|
|
timeout <<= 1;
|
|
if (timeout > NFS4_LOCK_MAXTIMEOUT)
|
|
return NFS4_LOCK_MAXTIMEOUT;
|
|
return timeout;
|
|
}
|
|
|
|
static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct inode *inode = state->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs_lockt_args arg = {
|
|
.fh = NFS_FH(inode),
|
|
.fl = request,
|
|
};
|
|
struct nfs_lockt_res res = {
|
|
.denied = request,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct nfs4_lock_state *lsp;
|
|
int status;
|
|
|
|
arg.lock_owner.clientid = clp->cl_clientid;
|
|
status = nfs4_set_lock_state(state, request);
|
|
if (status != 0)
|
|
goto out;
|
|
lsp = request->fl_u.nfs4_fl.owner;
|
|
arg.lock_owner.id = lsp->ls_seqid.owner_id;
|
|
arg.lock_owner.s_dev = server->s_dev;
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
|
|
switch (status) {
|
|
case 0:
|
|
request->fl_type = F_UNLCK;
|
|
break;
|
|
case -NFS4ERR_DENIED:
|
|
status = 0;
|
|
}
|
|
request->fl_ops->fl_release_private(request);
|
|
request->fl_ops = NULL;
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_proc_getlk(state, cmd, request);
|
|
trace_nfs4_get_lock(request, state, cmd, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int do_vfs_lock(struct file *file, struct file_lock *fl)
|
|
{
|
|
int res = 0;
|
|
switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
|
|
case FL_POSIX:
|
|
res = posix_lock_file_wait(file, fl);
|
|
break;
|
|
case FL_FLOCK:
|
|
res = flock_lock_file_wait(file, fl);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
return res;
|
|
}
|
|
|
|
struct nfs4_unlockdata {
|
|
struct nfs_locku_args arg;
|
|
struct nfs_locku_res res;
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_open_context *ctx;
|
|
struct file_lock fl;
|
|
const struct nfs_server *server;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
|
|
struct nfs_open_context *ctx,
|
|
struct nfs4_lock_state *lsp,
|
|
struct nfs_seqid *seqid)
|
|
{
|
|
struct nfs4_unlockdata *p;
|
|
struct inode *inode = lsp->ls_state->inode;
|
|
|
|
p = kzalloc(sizeof(*p), GFP_NOFS);
|
|
if (p == NULL)
|
|
return NULL;
|
|
p->arg.fh = NFS_FH(inode);
|
|
p->arg.fl = &p->fl;
|
|
p->arg.seqid = seqid;
|
|
p->res.seqid = seqid;
|
|
p->arg.stateid = &lsp->ls_stateid;
|
|
p->lsp = lsp;
|
|
atomic_inc(&lsp->ls_count);
|
|
/* Ensure we don't close file until we're done freeing locks! */
|
|
p->ctx = get_nfs_open_context(ctx);
|
|
memcpy(&p->fl, fl, sizeof(p->fl));
|
|
p->server = NFS_SERVER(inode);
|
|
return p;
|
|
}
|
|
|
|
static void nfs4_locku_release_calldata(void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
nfs_free_seqid(calldata->arg.seqid);
|
|
nfs4_put_lock_state(calldata->lsp);
|
|
put_nfs_open_context(calldata->ctx);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static void nfs4_locku_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
|
|
if (!nfs4_sequence_done(task, &calldata->res.seq_res))
|
|
return;
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
nfs4_stateid_copy(&calldata->lsp->ls_stateid,
|
|
&calldata->res.stateid);
|
|
renew_lease(calldata->server, calldata->timestamp);
|
|
break;
|
|
case -NFS4ERR_BAD_STATEID:
|
|
case -NFS4ERR_OLD_STATEID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
|
|
rpc_restart_call_prepare(task);
|
|
}
|
|
nfs_release_seqid(calldata->arg.seqid);
|
|
}
|
|
|
|
static void nfs4_locku_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
|
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
|
|
goto out_wait;
|
|
if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
|
|
/* Note: exit _without_ running nfs4_locku_done */
|
|
goto out_no_action;
|
|
}
|
|
calldata->timestamp = jiffies;
|
|
if (nfs4_setup_sequence(calldata->server,
|
|
&calldata->arg.seq_args,
|
|
&calldata->res.seq_res,
|
|
task) != 0)
|
|
nfs_release_seqid(calldata->arg.seqid);
|
|
return;
|
|
out_no_action:
|
|
task->tk_action = NULL;
|
|
out_wait:
|
|
nfs4_sequence_done(task, &calldata->res.seq_res);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_locku_ops = {
|
|
.rpc_call_prepare = nfs4_locku_prepare,
|
|
.rpc_call_done = nfs4_locku_done,
|
|
.rpc_release = nfs4_locku_release_calldata,
|
|
};
|
|
|
|
static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
|
|
struct nfs_open_context *ctx,
|
|
struct nfs4_lock_state *lsp,
|
|
struct nfs_seqid *seqid)
|
|
{
|
|
struct nfs4_unlockdata *data;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
|
|
.rpc_cred = ctx->cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = NFS_CLIENT(lsp->ls_state->inode),
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_locku_ops,
|
|
.workqueue = nfsiod_workqueue,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
|
|
nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
|
|
NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
|
|
|
|
/* Ensure this is an unlock - when canceling a lock, the
|
|
* canceled lock is passed in, and it won't be an unlock.
|
|
*/
|
|
fl->fl_type = F_UNLCK;
|
|
|
|
data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
|
|
if (data == NULL) {
|
|
nfs_free_seqid(seqid);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
|
|
msg.rpc_argp = &data->arg;
|
|
msg.rpc_resp = &data->res;
|
|
task_setup_data.callback_data = data;
|
|
return rpc_run_task(&task_setup_data);
|
|
}
|
|
|
|
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct inode *inode = state->inode;
|
|
struct nfs4_state_owner *sp = state->owner;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct nfs_seqid *seqid;
|
|
struct nfs4_lock_state *lsp;
|
|
struct rpc_task *task;
|
|
int status = 0;
|
|
unsigned char fl_flags = request->fl_flags;
|
|
|
|
status = nfs4_set_lock_state(state, request);
|
|
/* Unlock _before_ we do the RPC call */
|
|
request->fl_flags |= FL_EXISTS;
|
|
/* Exclude nfs_delegation_claim_locks() */
|
|
mutex_lock(&sp->so_delegreturn_mutex);
|
|
/* Exclude nfs4_reclaim_open_stateid() - note nesting! */
|
|
down_read(&nfsi->rwsem);
|
|
if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
|
|
up_read(&nfsi->rwsem);
|
|
mutex_unlock(&sp->so_delegreturn_mutex);
|
|
goto out;
|
|
}
|
|
up_read(&nfsi->rwsem);
|
|
mutex_unlock(&sp->so_delegreturn_mutex);
|
|
if (status != 0)
|
|
goto out;
|
|
/* Is this a delegated lock? */
|
|
lsp = request->fl_u.nfs4_fl.owner;
|
|
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
|
|
goto out;
|
|
seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
|
|
status = -ENOMEM;
|
|
if (seqid == NULL)
|
|
goto out;
|
|
task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
|
|
status = PTR_ERR(task);
|
|
if (IS_ERR(task))
|
|
goto out;
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
rpc_put_task(task);
|
|
out:
|
|
request->fl_flags = fl_flags;
|
|
trace_nfs4_unlock(request, state, F_SETLK, status);
|
|
return status;
|
|
}
|
|
|
|
struct nfs4_lockdata {
|
|
struct nfs_lock_args arg;
|
|
struct nfs_lock_res res;
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_open_context *ctx;
|
|
struct file_lock fl;
|
|
unsigned long timestamp;
|
|
int rpc_status;
|
|
int cancelled;
|
|
struct nfs_server *server;
|
|
};
|
|
|
|
static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
|
|
struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
|
|
gfp_t gfp_mask)
|
|
{
|
|
struct nfs4_lockdata *p;
|
|
struct inode *inode = lsp->ls_state->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
|
|
p = kzalloc(sizeof(*p), gfp_mask);
|
|
if (p == NULL)
|
|
return NULL;
|
|
|
|
p->arg.fh = NFS_FH(inode);
|
|
p->arg.fl = &p->fl;
|
|
p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
|
|
if (p->arg.open_seqid == NULL)
|
|
goto out_free;
|
|
p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
|
|
if (p->arg.lock_seqid == NULL)
|
|
goto out_free_seqid;
|
|
p->arg.lock_stateid = &lsp->ls_stateid;
|
|
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
|
|
p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
|
|
p->arg.lock_owner.s_dev = server->s_dev;
|
|
p->res.lock_seqid = p->arg.lock_seqid;
|
|
p->lsp = lsp;
|
|
p->server = server;
|
|
atomic_inc(&lsp->ls_count);
|
|
p->ctx = get_nfs_open_context(ctx);
|
|
memcpy(&p->fl, fl, sizeof(p->fl));
|
|
return p;
|
|
out_free_seqid:
|
|
nfs_free_seqid(p->arg.open_seqid);
|
|
out_free:
|
|
kfree(p);
|
|
return NULL;
|
|
}
|
|
|
|
static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
struct nfs4_state *state = data->lsp->ls_state;
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
|
|
goto out_wait;
|
|
/* Do we need to do an open_to_lock_owner? */
|
|
if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
|
|
if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
|
|
goto out_release_lock_seqid;
|
|
}
|
|
data->arg.open_stateid = &state->open_stateid;
|
|
data->arg.new_lock_owner = 1;
|
|
data->res.open_seqid = data->arg.open_seqid;
|
|
} else
|
|
data->arg.new_lock_owner = 0;
|
|
if (!nfs4_valid_open_stateid(state)) {
|
|
data->rpc_status = -EBADF;
|
|
task->tk_action = NULL;
|
|
goto out_release_open_seqid;
|
|
}
|
|
data->timestamp = jiffies;
|
|
if (nfs4_setup_sequence(data->server,
|
|
&data->arg.seq_args,
|
|
&data->res.seq_res,
|
|
task) == 0)
|
|
return;
|
|
out_release_open_seqid:
|
|
nfs_release_seqid(data->arg.open_seqid);
|
|
out_release_lock_seqid:
|
|
nfs_release_seqid(data->arg.lock_seqid);
|
|
out_wait:
|
|
nfs4_sequence_done(task, &data->res.seq_res);
|
|
dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
|
|
}
|
|
|
|
static void nfs4_lock_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res))
|
|
return;
|
|
|
|
data->rpc_status = task->tk_status;
|
|
if (data->arg.new_lock_owner != 0) {
|
|
if (data->rpc_status == 0)
|
|
nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
|
|
else
|
|
goto out;
|
|
}
|
|
if (data->rpc_status == 0) {
|
|
nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
|
|
set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
|
|
renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
|
|
}
|
|
out:
|
|
dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
|
|
}
|
|
|
|
static void nfs4_lock_release(void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
nfs_free_seqid(data->arg.open_seqid);
|
|
if (data->cancelled != 0) {
|
|
struct rpc_task *task;
|
|
task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
|
|
data->arg.lock_seqid);
|
|
if (!IS_ERR(task))
|
|
rpc_put_task_async(task);
|
|
dprintk("%s: cancelling lock!\n", __func__);
|
|
} else
|
|
nfs_free_seqid(data->arg.lock_seqid);
|
|
nfs4_put_lock_state(data->lsp);
|
|
put_nfs_open_context(data->ctx);
|
|
kfree(data);
|
|
dprintk("%s: done!\n", __func__);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_lock_ops = {
|
|
.rpc_call_prepare = nfs4_lock_prepare,
|
|
.rpc_call_done = nfs4_lock_done,
|
|
.rpc_release = nfs4_lock_release,
|
|
};
|
|
|
|
static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
|
|
{
|
|
switch (error) {
|
|
case -NFS4ERR_ADMIN_REVOKED:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
|
|
if (new_lock_owner != 0 ||
|
|
test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
|
|
nfs4_schedule_stateid_recovery(server, lsp->ls_state);
|
|
break;
|
|
case -NFS4ERR_STALE_STATEID:
|
|
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
|
|
case -NFS4ERR_EXPIRED:
|
|
nfs4_schedule_lease_recovery(server->nfs_client);
|
|
};
|
|
}
|
|
|
|
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
|
|
{
|
|
struct nfs4_lockdata *data;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = NFS_CLIENT(state->inode),
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_lock_ops,
|
|
.workqueue = nfsiod_workqueue,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int ret;
|
|
|
|
dprintk("%s: begin!\n", __func__);
|
|
data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
|
|
fl->fl_u.nfs4_fl.owner,
|
|
recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
if (IS_SETLKW(cmd))
|
|
data->arg.block = 1;
|
|
nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
|
|
msg.rpc_argp = &data->arg;
|
|
msg.rpc_resp = &data->res;
|
|
task_setup_data.callback_data = data;
|
|
if (recovery_type > NFS_LOCK_NEW) {
|
|
if (recovery_type == NFS_LOCK_RECLAIM)
|
|
data->arg.reclaim = NFS_LOCK_RECLAIM;
|
|
nfs4_set_sequence_privileged(&data->arg.seq_args);
|
|
}
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
ret = nfs4_wait_for_completion_rpc_task(task);
|
|
if (ret == 0) {
|
|
ret = data->rpc_status;
|
|
if (ret)
|
|
nfs4_handle_setlk_error(data->server, data->lsp,
|
|
data->arg.new_lock_owner, ret);
|
|
} else
|
|
data->cancelled = 1;
|
|
rpc_put_task(task);
|
|
dprintk("%s: done, ret = %d!\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = {
|
|
.inode = state->inode,
|
|
};
|
|
int err;
|
|
|
|
do {
|
|
/* Cache the lock if possible... */
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
|
|
return 0;
|
|
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
|
|
trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = {
|
|
.inode = state->inode,
|
|
};
|
|
int err;
|
|
|
|
err = nfs4_set_lock_state(state, request);
|
|
if (err != 0)
|
|
return err;
|
|
if (!recover_lost_locks) {
|
|
set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
|
|
return 0;
|
|
}
|
|
do {
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
|
|
return 0;
|
|
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
|
|
trace_nfs4_lock_expired(request, state, F_SETLK, err);
|
|
switch (err) {
|
|
default:
|
|
goto out;
|
|
case -NFS4ERR_GRACE:
|
|
case -NFS4ERR_DELAY:
|
|
nfs4_handle_exception(server, err, &exception);
|
|
err = 0;
|
|
}
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
/**
|
|
* nfs41_check_expired_locks - possibly free a lock stateid
|
|
*
|
|
* @state: NFSv4 state for an inode
|
|
*
|
|
* Returns NFS_OK if recovery for this stateid is now finished.
|
|
* Otherwise a negative NFS4ERR value is returned.
|
|
*/
|
|
static int nfs41_check_expired_locks(struct nfs4_state *state)
|
|
{
|
|
int status, ret = -NFS4ERR_BAD_STATEID;
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
|
|
list_for_each_entry(lsp, &state->lock_states, ls_locks) {
|
|
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
|
|
struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
|
|
|
|
status = nfs41_test_stateid(server,
|
|
&lsp->ls_stateid,
|
|
cred);
|
|
trace_nfs4_test_lock_stateid(state, lsp, status);
|
|
if (status != NFS_OK) {
|
|
/* Free the stateid unless the server
|
|
* informs us the stateid is unrecognized. */
|
|
if (status != -NFS4ERR_BAD_STATEID)
|
|
nfs41_free_stateid(server,
|
|
&lsp->ls_stateid,
|
|
cred);
|
|
clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
|
|
ret = status;
|
|
}
|
|
}
|
|
};
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
|
|
{
|
|
int status = NFS_OK;
|
|
|
|
if (test_bit(LK_STATE_IN_USE, &state->flags))
|
|
status = nfs41_check_expired_locks(state);
|
|
if (status != NFS_OK)
|
|
status = nfs4_lock_expired(state, request);
|
|
return status;
|
|
}
|
|
#endif
|
|
|
|
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs4_state_owner *sp = state->owner;
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
unsigned char fl_flags = request->fl_flags;
|
|
unsigned int seq;
|
|
int status = -ENOLCK;
|
|
|
|
if ((fl_flags & FL_POSIX) &&
|
|
!test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
|
|
goto out;
|
|
/* Is this a delegated open? */
|
|
status = nfs4_set_lock_state(state, request);
|
|
if (status != 0)
|
|
goto out;
|
|
request->fl_flags |= FL_ACCESS;
|
|
status = do_vfs_lock(request->fl_file, request);
|
|
if (status < 0)
|
|
goto out;
|
|
down_read(&nfsi->rwsem);
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
|
|
/* Yes: cache locks! */
|
|
/* ...but avoid races with delegation recall... */
|
|
request->fl_flags = fl_flags & ~FL_SLEEP;
|
|
status = do_vfs_lock(request->fl_file, request);
|
|
goto out_unlock;
|
|
}
|
|
seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
|
|
up_read(&nfsi->rwsem);
|
|
status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
|
|
if (status != 0)
|
|
goto out;
|
|
down_read(&nfsi->rwsem);
|
|
if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
|
|
status = -NFS4ERR_DELAY;
|
|
goto out_unlock;
|
|
}
|
|
/* Note: we always want to sleep here! */
|
|
request->fl_flags = fl_flags | FL_SLEEP;
|
|
if (do_vfs_lock(request->fl_file, request) < 0)
|
|
printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
|
|
"manager!\n", __func__);
|
|
out_unlock:
|
|
up_read(&nfsi->rwsem);
|
|
out:
|
|
request->fl_flags = fl_flags;
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs4_exception exception = {
|
|
.state = state,
|
|
.inode = state->inode,
|
|
};
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_proc_setlk(state, cmd, request);
|
|
trace_nfs4_set_lock(request, state, cmd, err);
|
|
if (err == -NFS4ERR_DENIED)
|
|
err = -EAGAIN;
|
|
err = nfs4_handle_exception(NFS_SERVER(state->inode),
|
|
err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
struct nfs4_state *state;
|
|
unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
|
|
int status;
|
|
|
|
/* verify open state */
|
|
ctx = nfs_file_open_context(filp);
|
|
state = ctx->state;
|
|
|
|
if (request->fl_start < 0 || request->fl_end < 0)
|
|
return -EINVAL;
|
|
|
|
if (IS_GETLK(cmd)) {
|
|
if (state != NULL)
|
|
return nfs4_proc_getlk(state, F_GETLK, request);
|
|
return 0;
|
|
}
|
|
|
|
if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
|
|
return -EINVAL;
|
|
|
|
if (request->fl_type == F_UNLCK) {
|
|
if (state != NULL)
|
|
return nfs4_proc_unlck(state, cmd, request);
|
|
return 0;
|
|
}
|
|
|
|
if (state == NULL)
|
|
return -ENOLCK;
|
|
/*
|
|
* Don't rely on the VFS having checked the file open mode,
|
|
* since it won't do this for flock() locks.
|
|
*/
|
|
switch (request->fl_type) {
|
|
case F_RDLCK:
|
|
if (!(filp->f_mode & FMODE_READ))
|
|
return -EBADF;
|
|
break;
|
|
case F_WRLCK:
|
|
if (!(filp->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
}
|
|
|
|
do {
|
|
status = nfs4_proc_setlk(state, cmd, request);
|
|
if ((status != -EAGAIN) || IS_SETLK(cmd))
|
|
break;
|
|
timeout = nfs4_set_lock_task_retry(timeout);
|
|
status = -ERESTARTSYS;
|
|
if (signalled())
|
|
break;
|
|
} while(status < 0);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
int err;
|
|
|
|
err = nfs4_set_lock_state(state, fl);
|
|
if (err != 0)
|
|
return err;
|
|
err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
|
|
return nfs4_handle_delegation_recall_error(server, state, stateid, err);
|
|
}
|
|
|
|
struct nfs_release_lockowner_data {
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_server *server;
|
|
struct nfs_release_lockowner_args args;
|
|
struct nfs4_sequence_args seq_args;
|
|
struct nfs4_sequence_res seq_res;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs_release_lockowner_data *data = calldata;
|
|
nfs40_setup_sequence(data->server,
|
|
&data->seq_args, &data->seq_res, task);
|
|
data->timestamp = jiffies;
|
|
}
|
|
|
|
static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs_release_lockowner_data *data = calldata;
|
|
struct nfs_server *server = data->server;
|
|
|
|
nfs40_sequence_done(task, &data->seq_res);
|
|
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
renew_lease(server, data->timestamp);
|
|
break;
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_EXPIRED:
|
|
case -NFS4ERR_LEASE_MOVED:
|
|
case -NFS4ERR_DELAY:
|
|
if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
|
|
rpc_restart_call_prepare(task);
|
|
}
|
|
}
|
|
|
|
static void nfs4_release_lockowner_release(void *calldata)
|
|
{
|
|
struct nfs_release_lockowner_data *data = calldata;
|
|
nfs4_free_lock_state(data->server, data->lsp);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_release_lockowner_ops = {
|
|
.rpc_call_prepare = nfs4_release_lockowner_prepare,
|
|
.rpc_call_done = nfs4_release_lockowner_done,
|
|
.rpc_release = nfs4_release_lockowner_release,
|
|
};
|
|
|
|
static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
|
|
{
|
|
struct nfs_release_lockowner_data *data;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
|
|
};
|
|
|
|
if (server->nfs_client->cl_mvops->minor_version != 0)
|
|
return -EINVAL;
|
|
|
|
data = kmalloc(sizeof(*data), GFP_NOFS);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
|
|
data->lsp = lsp;
|
|
data->server = server;
|
|
data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
|
|
data->args.lock_owner.id = lsp->ls_seqid.owner_id;
|
|
data->args.lock_owner.s_dev = server->s_dev;
|
|
|
|
msg.rpc_argp = &data->args;
|
|
rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
|
|
return 0;
|
|
}
|
|
|
|
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
|
|
|
|
static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
|
|
const void *buf, size_t buflen,
|
|
int flags, int type)
|
|
{
|
|
if (strcmp(key, "") != 0)
|
|
return -EINVAL;
|
|
|
|
return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
|
|
}
|
|
|
|
static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
|
|
void *buf, size_t buflen, int type)
|
|
{
|
|
if (strcmp(key, "") != 0)
|
|
return -EINVAL;
|
|
|
|
return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
|
|
}
|
|
|
|
static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
|
|
size_t list_len, const char *name,
|
|
size_t name_len, int type)
|
|
{
|
|
size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
|
|
|
|
if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
|
|
return 0;
|
|
|
|
if (list && len <= list_len)
|
|
memcpy(list, XATTR_NAME_NFSV4_ACL, len);
|
|
return len;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
|
|
static inline int nfs4_server_supports_labels(struct nfs_server *server)
|
|
{
|
|
return server->caps & NFS_CAP_SECURITY_LABEL;
|
|
}
|
|
|
|
static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
|
|
const void *buf, size_t buflen,
|
|
int flags, int type)
|
|
{
|
|
if (security_ismaclabel(key))
|
|
return nfs4_set_security_label(dentry, buf, buflen);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
|
|
void *buf, size_t buflen, int type)
|
|
{
|
|
if (security_ismaclabel(key))
|
|
return nfs4_get_security_label(dentry->d_inode, buf, buflen);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
|
|
size_t list_len, const char *name,
|
|
size_t name_len, int type)
|
|
{
|
|
size_t len = 0;
|
|
|
|
if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
|
|
len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
|
|
if (list && len <= list_len)
|
|
security_inode_listsecurity(dentry->d_inode, list, len);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
|
|
.prefix = XATTR_SECURITY_PREFIX,
|
|
.list = nfs4_xattr_list_nfs4_label,
|
|
.get = nfs4_xattr_get_nfs4_label,
|
|
.set = nfs4_xattr_set_nfs4_label,
|
|
};
|
|
#endif
|
|
|
|
|
|
/*
|
|
* nfs_fhget will use either the mounted_on_fileid or the fileid
|
|
*/
|
|
static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
|
|
{
|
|
if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
|
|
(fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
|
|
(fattr->valid & NFS_ATTR_FATTR_FSID) &&
|
|
(fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
|
|
return;
|
|
|
|
fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
|
|
NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
|
|
fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
|
|
fattr->nlink = 2;
|
|
}
|
|
|
|
static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
|
|
const struct qstr *name,
|
|
struct nfs4_fs_locations *fs_locations,
|
|
struct page *page)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
u32 bitmask[3] = {
|
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
|
|
};
|
|
struct nfs4_fs_locations_arg args = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
.page = page,
|
|
.bitmask = bitmask,
|
|
};
|
|
struct nfs4_fs_locations_res res = {
|
|
.fs_locations = fs_locations,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
dprintk("%s: start\n", __func__);
|
|
|
|
/* Ask for the fileid of the absent filesystem if mounted_on_fileid
|
|
* is not supported */
|
|
if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
|
|
bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
|
|
else
|
|
bitmask[0] |= FATTR4_WORD0_FILEID;
|
|
|
|
nfs_fattr_init(&fs_locations->fattr);
|
|
fs_locations->server = server;
|
|
fs_locations->nlocations = 0;
|
|
status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
dprintk("%s: returned status = %d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
|
|
const struct qstr *name,
|
|
struct nfs4_fs_locations *fs_locations,
|
|
struct page *page)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_fs_locations(client, dir, name,
|
|
fs_locations, page);
|
|
trace_nfs4_get_fs_locations(dir, name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This operation also signals the server that this client is
|
|
* performing migration recovery. The server can stop returning
|
|
* NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
|
|
* appended to this compound to identify the client ID which is
|
|
* performing recovery.
|
|
*/
|
|
static int _nfs40_proc_get_locations(struct inode *inode,
|
|
struct nfs4_fs_locations *locations,
|
|
struct page *page, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct rpc_clnt *clnt = server->client;
|
|
u32 bitmask[2] = {
|
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
|
|
};
|
|
struct nfs4_fs_locations_arg args = {
|
|
.clientid = server->nfs_client->cl_clientid,
|
|
.fh = NFS_FH(inode),
|
|
.page = page,
|
|
.bitmask = bitmask,
|
|
.migration = 1, /* skip LOOKUP */
|
|
.renew = 1, /* append RENEW */
|
|
};
|
|
struct nfs4_fs_locations_res res = {
|
|
.fs_locations = locations,
|
|
.migration = 1,
|
|
.renew = 1,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long now = jiffies;
|
|
int status;
|
|
|
|
nfs_fattr_init(&locations->fattr);
|
|
locations->server = server;
|
|
locations->nlocations = 0;
|
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.seq_args);
|
|
status = nfs4_call_sync_sequence(clnt, server, &msg,
|
|
&args.seq_args, &res.seq_res);
|
|
if (status)
|
|
return status;
|
|
|
|
renew_lease(server, now);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_1
|
|
|
|
/*
|
|
* This operation also signals the server that this client is
|
|
* performing migration recovery. The server can stop asserting
|
|
* SEQ4_STATUS_LEASE_MOVED for this client. The client ID
|
|
* performing this operation is identified in the SEQUENCE
|
|
* operation in this compound.
|
|
*
|
|
* When the client supports GETATTR(fs_locations_info), it can
|
|
* be plumbed in here.
|
|
*/
|
|
static int _nfs41_proc_get_locations(struct inode *inode,
|
|
struct nfs4_fs_locations *locations,
|
|
struct page *page, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct rpc_clnt *clnt = server->client;
|
|
u32 bitmask[2] = {
|
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
|
|
};
|
|
struct nfs4_fs_locations_arg args = {
|
|
.fh = NFS_FH(inode),
|
|
.page = page,
|
|
.bitmask = bitmask,
|
|
.migration = 1, /* skip LOOKUP */
|
|
};
|
|
struct nfs4_fs_locations_res res = {
|
|
.fs_locations = locations,
|
|
.migration = 1,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
nfs_fattr_init(&locations->fattr);
|
|
locations->server = server;
|
|
locations->nlocations = 0;
|
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.seq_args);
|
|
status = nfs4_call_sync_sequence(clnt, server, &msg,
|
|
&args.seq_args, &res.seq_res);
|
|
if (status == NFS4_OK &&
|
|
res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
|
|
status = -NFS4ERR_LEASE_MOVED;
|
|
return status;
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
/**
|
|
* nfs4_proc_get_locations - discover locations for a migrated FSID
|
|
* @inode: inode on FSID that is migrating
|
|
* @locations: result of query
|
|
* @page: buffer
|
|
* @cred: credential to use for this operation
|
|
*
|
|
* Returns NFS4_OK on success, a negative NFS4ERR status code if the
|
|
* operation failed, or a negative errno if a local error occurred.
|
|
*
|
|
* On success, "locations" is filled in, but if the server has
|
|
* no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
|
|
* asserted.
|
|
*
|
|
* -NFS4ERR_LEASE_MOVED is returned if the server still has leases
|
|
* from this client that require migration recovery.
|
|
*/
|
|
int nfs4_proc_get_locations(struct inode *inode,
|
|
struct nfs4_fs_locations *locations,
|
|
struct page *page, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
const struct nfs4_mig_recovery_ops *ops =
|
|
clp->cl_mvops->mig_recovery_ops;
|
|
struct nfs4_exception exception = { };
|
|
int status;
|
|
|
|
dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
|
|
(unsigned long long)server->fsid.major,
|
|
(unsigned long long)server->fsid.minor,
|
|
clp->cl_hostname);
|
|
nfs_display_fhandle(NFS_FH(inode), __func__);
|
|
|
|
do {
|
|
status = ops->get_locations(inode, locations, page, cred);
|
|
if (status != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, status, &exception);
|
|
} while (exception.retry);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* This operation also signals the server that this client is
|
|
* performing "lease moved" recovery. The server can stop
|
|
* returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
|
|
* is appended to this compound to identify the client ID which is
|
|
* performing recovery.
|
|
*/
|
|
static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
|
|
struct rpc_clnt *clnt = server->client;
|
|
struct nfs4_fsid_present_arg args = {
|
|
.fh = NFS_FH(inode),
|
|
.clientid = clp->cl_clientid,
|
|
.renew = 1, /* append RENEW */
|
|
};
|
|
struct nfs4_fsid_present_res res = {
|
|
.renew = 1,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long now = jiffies;
|
|
int status;
|
|
|
|
res.fh = nfs_alloc_fhandle();
|
|
if (res.fh == NULL)
|
|
return -ENOMEM;
|
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.seq_args);
|
|
status = nfs4_call_sync_sequence(clnt, server, &msg,
|
|
&args.seq_args, &res.seq_res);
|
|
nfs_free_fhandle(res.fh);
|
|
if (status)
|
|
return status;
|
|
|
|
do_renew_lease(clp, now);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_1
|
|
|
|
/*
|
|
* This operation also signals the server that this client is
|
|
* performing "lease moved" recovery. The server can stop asserting
|
|
* SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
|
|
* this operation is identified in the SEQUENCE operation in this
|
|
* compound.
|
|
*/
|
|
static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct rpc_clnt *clnt = server->client;
|
|
struct nfs4_fsid_present_arg args = {
|
|
.fh = NFS_FH(inode),
|
|
};
|
|
struct nfs4_fsid_present_res res = {
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
res.fh = nfs_alloc_fhandle();
|
|
if (res.fh == NULL)
|
|
return -ENOMEM;
|
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.seq_args);
|
|
status = nfs4_call_sync_sequence(clnt, server, &msg,
|
|
&args.seq_args, &res.seq_res);
|
|
nfs_free_fhandle(res.fh);
|
|
if (status == NFS4_OK &&
|
|
res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
|
|
status = -NFS4ERR_LEASE_MOVED;
|
|
return status;
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
/**
|
|
* nfs4_proc_fsid_present - Is this FSID present or absent on server?
|
|
* @inode: inode on FSID to check
|
|
* @cred: credential to use for this operation
|
|
*
|
|
* Server indicates whether the FSID is present, moved, or not
|
|
* recognized. This operation is necessary to clear a LEASE_MOVED
|
|
* condition for this client ID.
|
|
*
|
|
* Returns NFS4_OK if the FSID is present on this server,
|
|
* -NFS4ERR_MOVED if the FSID is no longer present, a negative
|
|
* NFS4ERR code if some error occurred on the server, or a
|
|
* negative errno if a local failure occurred.
|
|
*/
|
|
int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
const struct nfs4_mig_recovery_ops *ops =
|
|
clp->cl_mvops->mig_recovery_ops;
|
|
struct nfs4_exception exception = { };
|
|
int status;
|
|
|
|
dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
|
|
(unsigned long long)server->fsid.major,
|
|
(unsigned long long)server->fsid.minor,
|
|
clp->cl_hostname);
|
|
nfs_display_fhandle(NFS_FH(inode), __func__);
|
|
|
|
do {
|
|
status = ops->fsid_present(inode, cred);
|
|
if (status != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, status, &exception);
|
|
} while (exception.retry);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* If 'use_integrity' is true and the state managment nfs_client
|
|
* cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
|
|
* and the machine credential as per RFC3530bis and RFC5661 Security
|
|
* Considerations sections. Otherwise, just use the user cred with the
|
|
* filesystem's rpc_client.
|
|
*/
|
|
static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
|
|
{
|
|
int status;
|
|
struct nfs4_secinfo_arg args = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
};
|
|
struct nfs4_secinfo_res res = {
|
|
.flavors = flavors,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
|
|
struct rpc_cred *cred = NULL;
|
|
|
|
if (use_integrity) {
|
|
clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
|
|
cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
|
|
msg.rpc_cred = cred;
|
|
}
|
|
|
|
dprintk("NFS call secinfo %s\n", name->name);
|
|
|
|
nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
|
|
NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
|
|
|
|
status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
|
|
&res.seq_res, 0);
|
|
dprintk("NFS reply secinfo: %d\n", status);
|
|
|
|
if (cred)
|
|
put_rpccred(cred);
|
|
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
|
|
struct nfs4_secinfo_flavors *flavors)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = -NFS4ERR_WRONGSEC;
|
|
|
|
/* try to use integrity protection with machine cred */
|
|
if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
|
|
err = _nfs4_proc_secinfo(dir, name, flavors, true);
|
|
|
|
/*
|
|
* if unable to use integrity protection, or SECINFO with
|
|
* integrity protection returns NFS4ERR_WRONGSEC (which is
|
|
* disallowed by spec, but exists in deployed servers) use
|
|
* the current filesystem's rpc_client and the user cred.
|
|
*/
|
|
if (err == -NFS4ERR_WRONGSEC)
|
|
err = _nfs4_proc_secinfo(dir, name, flavors, false);
|
|
|
|
trace_nfs4_secinfo(dir, name, err);
|
|
err = nfs4_handle_exception(NFS_SERVER(dir), err,
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_NFS_V4_1
|
|
/*
|
|
* Check the exchange flags returned by the server for invalid flags, having
|
|
* both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
|
|
* DS flags set.
|
|
*/
|
|
static int nfs4_check_cl_exchange_flags(u32 flags)
|
|
{
|
|
if (flags & ~EXCHGID4_FLAG_MASK_R)
|
|
goto out_inval;
|
|
if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
|
|
(flags & EXCHGID4_FLAG_USE_NON_PNFS))
|
|
goto out_inval;
|
|
if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
|
|
goto out_inval;
|
|
return NFS_OK;
|
|
out_inval:
|
|
return -NFS4ERR_INVAL;
|
|
}
|
|
|
|
static bool
|
|
nfs41_same_server_scope(struct nfs41_server_scope *a,
|
|
struct nfs41_server_scope *b)
|
|
{
|
|
if (a->server_scope_sz == b->server_scope_sz &&
|
|
memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* nfs4_proc_bind_conn_to_session()
|
|
*
|
|
* The 4.1 client currently uses the same TCP connection for the
|
|
* fore and backchannel.
|
|
*/
|
|
int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
int status;
|
|
struct nfs41_bind_conn_to_session_res res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc =
|
|
&nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
|
|
.rpc_argp = clp,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
|
|
if (unlikely(res.session == NULL)) {
|
|
status = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_bind_conn_to_session(clp, status);
|
|
if (status == 0) {
|
|
if (memcmp(res.session->sess_id.data,
|
|
clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
|
|
dprintk("NFS: %s: Session ID mismatch\n", __func__);
|
|
status = -EIO;
|
|
goto out_session;
|
|
}
|
|
if (res.dir != NFS4_CDFS4_BOTH) {
|
|
dprintk("NFS: %s: Unexpected direction from server\n",
|
|
__func__);
|
|
status = -EIO;
|
|
goto out_session;
|
|
}
|
|
if (res.use_conn_in_rdma_mode) {
|
|
dprintk("NFS: %s: Server returned RDMA mode = true\n",
|
|
__func__);
|
|
status = -EIO;
|
|
goto out_session;
|
|
}
|
|
}
|
|
out_session:
|
|
kfree(res.session);
|
|
out:
|
|
dprintk("<-- %s status= %d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
|
|
* and operations we'd like to see to enable certain features in the allow map
|
|
*/
|
|
static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
|
|
.how = SP4_MACH_CRED,
|
|
.enforce.u.words = {
|
|
[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
|
|
1 << (OP_EXCHANGE_ID - 32) |
|
|
1 << (OP_CREATE_SESSION - 32) |
|
|
1 << (OP_DESTROY_SESSION - 32) |
|
|
1 << (OP_DESTROY_CLIENTID - 32)
|
|
},
|
|
.allow.u.words = {
|
|
[0] = 1 << (OP_CLOSE) |
|
|
1 << (OP_LOCKU) |
|
|
1 << (OP_COMMIT),
|
|
[1] = 1 << (OP_SECINFO - 32) |
|
|
1 << (OP_SECINFO_NO_NAME - 32) |
|
|
1 << (OP_TEST_STATEID - 32) |
|
|
1 << (OP_FREE_STATEID - 32) |
|
|
1 << (OP_WRITE - 32)
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Select the state protection mode for client `clp' given the server results
|
|
* from exchange_id in `sp'.
|
|
*
|
|
* Returns 0 on success, negative errno otherwise.
|
|
*/
|
|
static int nfs4_sp4_select_mode(struct nfs_client *clp,
|
|
struct nfs41_state_protection *sp)
|
|
{
|
|
static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
|
|
[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
|
|
1 << (OP_EXCHANGE_ID - 32) |
|
|
1 << (OP_CREATE_SESSION - 32) |
|
|
1 << (OP_DESTROY_SESSION - 32) |
|
|
1 << (OP_DESTROY_CLIENTID - 32)
|
|
};
|
|
unsigned int i;
|
|
|
|
if (sp->how == SP4_MACH_CRED) {
|
|
/* Print state protect result */
|
|
dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
|
|
for (i = 0; i <= LAST_NFS4_OP; i++) {
|
|
if (test_bit(i, sp->enforce.u.longs))
|
|
dfprintk(MOUNT, " enforce op %d\n", i);
|
|
if (test_bit(i, sp->allow.u.longs))
|
|
dfprintk(MOUNT, " allow op %d\n", i);
|
|
}
|
|
|
|
/* make sure nothing is on enforce list that isn't supported */
|
|
for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
|
|
if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
|
|
dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Minimal mode - state operations are allowed to use machine
|
|
* credential. Note this already happens by default, so the
|
|
* client doesn't have to do anything more than the negotiation.
|
|
*
|
|
* NOTE: we don't care if EXCHANGE_ID is in the list -
|
|
* we're already using the machine cred for exchange_id
|
|
* and will never use a different cred.
|
|
*/
|
|
if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
|
|
test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
|
|
test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
|
|
test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
|
|
dfprintk(MOUNT, "sp4_mach_cred:\n");
|
|
dfprintk(MOUNT, " minimal mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
|
|
} else {
|
|
dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
|
|
test_bit(OP_LOCKU, sp->allow.u.longs)) {
|
|
dfprintk(MOUNT, " cleanup mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
|
|
}
|
|
|
|
if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
|
|
test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
|
|
dfprintk(MOUNT, " secinfo mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
|
|
}
|
|
|
|
if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
|
|
test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
|
|
dfprintk(MOUNT, " stateid mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
|
|
}
|
|
|
|
if (test_bit(OP_WRITE, sp->allow.u.longs)) {
|
|
dfprintk(MOUNT, " write mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
|
|
}
|
|
|
|
if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
|
|
dfprintk(MOUNT, " commit mode enabled\n");
|
|
set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* _nfs4_proc_exchange_id()
|
|
*
|
|
* Wrapper for EXCHANGE_ID operation.
|
|
*/
|
|
static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
|
|
u32 sp4_how)
|
|
{
|
|
nfs4_verifier verifier;
|
|
struct nfs41_exchange_id_args args = {
|
|
.verifier = &verifier,
|
|
.client = clp,
|
|
#ifdef CONFIG_NFS_V4_1_MIGRATION
|
|
.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
|
|
EXCHGID4_FLAG_BIND_PRINC_STATEID |
|
|
EXCHGID4_FLAG_SUPP_MOVED_MIGR,
|
|
#else
|
|
.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
|
|
EXCHGID4_FLAG_BIND_PRINC_STATEID,
|
|
#endif
|
|
};
|
|
struct nfs41_exchange_id_res res = {
|
|
0
|
|
};
|
|
int status;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
|
|
nfs4_init_boot_verifier(clp, &verifier);
|
|
args.id_len = nfs4_init_uniform_client_string(clp, args.id,
|
|
sizeof(args.id));
|
|
dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
|
|
clp->cl_rpcclient->cl_auth->au_ops->au_name,
|
|
args.id_len, args.id);
|
|
|
|
res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
|
|
GFP_NOFS);
|
|
if (unlikely(res.server_owner == NULL)) {
|
|
status = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
|
|
GFP_NOFS);
|
|
if (unlikely(res.server_scope == NULL)) {
|
|
status = -ENOMEM;
|
|
goto out_server_owner;
|
|
}
|
|
|
|
res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
|
|
if (unlikely(res.impl_id == NULL)) {
|
|
status = -ENOMEM;
|
|
goto out_server_scope;
|
|
}
|
|
|
|
switch (sp4_how) {
|
|
case SP4_NONE:
|
|
args.state_protect.how = SP4_NONE;
|
|
break;
|
|
|
|
case SP4_MACH_CRED:
|
|
args.state_protect = nfs4_sp4_mach_cred_request;
|
|
break;
|
|
|
|
default:
|
|
/* unsupported! */
|
|
WARN_ON_ONCE(1);
|
|
status = -EINVAL;
|
|
goto out_server_scope;
|
|
}
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_exchange_id(clp, status);
|
|
if (status == 0)
|
|
status = nfs4_check_cl_exchange_flags(res.flags);
|
|
|
|
if (status == 0)
|
|
status = nfs4_sp4_select_mode(clp, &res.state_protect);
|
|
|
|
if (status == 0) {
|
|
clp->cl_clientid = res.clientid;
|
|
clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
|
|
if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
|
|
clp->cl_seqid = res.seqid;
|
|
|
|
kfree(clp->cl_serverowner);
|
|
clp->cl_serverowner = res.server_owner;
|
|
res.server_owner = NULL;
|
|
|
|
/* use the most recent implementation id */
|
|
kfree(clp->cl_implid);
|
|
clp->cl_implid = res.impl_id;
|
|
|
|
if (clp->cl_serverscope != NULL &&
|
|
!nfs41_same_server_scope(clp->cl_serverscope,
|
|
res.server_scope)) {
|
|
dprintk("%s: server_scope mismatch detected\n",
|
|
__func__);
|
|
set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
|
|
kfree(clp->cl_serverscope);
|
|
clp->cl_serverscope = NULL;
|
|
}
|
|
|
|
if (clp->cl_serverscope == NULL) {
|
|
clp->cl_serverscope = res.server_scope;
|
|
goto out;
|
|
}
|
|
} else
|
|
kfree(res.impl_id);
|
|
|
|
out_server_owner:
|
|
kfree(res.server_owner);
|
|
out_server_scope:
|
|
kfree(res.server_scope);
|
|
out:
|
|
if (clp->cl_implid != NULL)
|
|
dprintk("NFS reply exchange_id: Server Implementation ID: "
|
|
"domain: %s, name: %s, date: %llu,%u\n",
|
|
clp->cl_implid->domain, clp->cl_implid->name,
|
|
clp->cl_implid->date.seconds,
|
|
clp->cl_implid->date.nseconds);
|
|
dprintk("NFS reply exchange_id: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* nfs4_proc_exchange_id()
|
|
*
|
|
* Returns zero, a negative errno, or a negative NFS4ERR status code.
|
|
*
|
|
* Since the clientid has expired, all compounds using sessions
|
|
* associated with the stale clientid will be returning
|
|
* NFS4ERR_BADSESSION in the sequence operation, and will therefore
|
|
* be in some phase of session reset.
|
|
*
|
|
* Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
|
|
*/
|
|
int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
|
|
int status;
|
|
|
|
/* try SP4_MACH_CRED if krb5i/p */
|
|
if (authflavor == RPC_AUTH_GSS_KRB5I ||
|
|
authflavor == RPC_AUTH_GSS_KRB5P) {
|
|
status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
|
|
if (!status)
|
|
return 0;
|
|
}
|
|
|
|
/* try SP4_NONE */
|
|
return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
|
|
}
|
|
|
|
static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
|
|
.rpc_argp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_destroy_clientid(clp, status);
|
|
if (status)
|
|
dprintk("NFS: Got error %d from the server %s on "
|
|
"DESTROY_CLIENTID.", status, clp->cl_hostname);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
|
|
struct rpc_cred *cred)
|
|
{
|
|
unsigned int loop;
|
|
int ret;
|
|
|
|
for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
|
|
ret = _nfs4_proc_destroy_clientid(clp, cred);
|
|
switch (ret) {
|
|
case -NFS4ERR_DELAY:
|
|
case -NFS4ERR_CLIENTID_BUSY:
|
|
ssleep(1);
|
|
break;
|
|
default:
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int nfs4_destroy_clientid(struct nfs_client *clp)
|
|
{
|
|
struct rpc_cred *cred;
|
|
int ret = 0;
|
|
|
|
if (clp->cl_mvops->minor_version < 1)
|
|
goto out;
|
|
if (clp->cl_exchange_flags == 0)
|
|
goto out;
|
|
if (clp->cl_preserve_clid)
|
|
goto out;
|
|
cred = nfs4_get_clid_cred(clp);
|
|
ret = nfs4_proc_destroy_clientid(clp, cred);
|
|
if (cred)
|
|
put_rpccred(cred);
|
|
switch (ret) {
|
|
case 0:
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
clp->cl_exchange_flags = 0;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
struct nfs4_get_lease_time_data {
|
|
struct nfs4_get_lease_time_args *args;
|
|
struct nfs4_get_lease_time_res *res;
|
|
struct nfs_client *clp;
|
|
};
|
|
|
|
static void nfs4_get_lease_time_prepare(struct rpc_task *task,
|
|
void *calldata)
|
|
{
|
|
struct nfs4_get_lease_time_data *data =
|
|
(struct nfs4_get_lease_time_data *)calldata;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
/* just setup sequence, do not trigger session recovery
|
|
since we're invoked within one */
|
|
nfs41_setup_sequence(data->clp->cl_session,
|
|
&data->args->la_seq_args,
|
|
&data->res->lr_seq_res,
|
|
task);
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
/*
|
|
* Called from nfs4_state_manager thread for session setup, so don't recover
|
|
* from sequence operation or clientid errors.
|
|
*/
|
|
static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_get_lease_time_data *data =
|
|
(struct nfs4_get_lease_time_data *)calldata;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
|
|
return;
|
|
switch (task->tk_status) {
|
|
case -NFS4ERR_DELAY:
|
|
case -NFS4ERR_GRACE:
|
|
dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
|
|
rpc_delay(task, NFS4_POLL_RETRY_MIN);
|
|
task->tk_status = 0;
|
|
/* fall through */
|
|
case -NFS4ERR_RETRY_UNCACHED_REP:
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_get_lease_time_ops = {
|
|
.rpc_call_prepare = nfs4_get_lease_time_prepare,
|
|
.rpc_call_done = nfs4_get_lease_time_done,
|
|
};
|
|
|
|
int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
|
|
{
|
|
struct rpc_task *task;
|
|
struct nfs4_get_lease_time_args args;
|
|
struct nfs4_get_lease_time_res res = {
|
|
.lr_fsinfo = fsinfo,
|
|
};
|
|
struct nfs4_get_lease_time_data data = {
|
|
.args = &args,
|
|
.res = &res,
|
|
.clp = clp,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
struct rpc_task_setup task_setup = {
|
|
.rpc_client = clp->cl_rpcclient,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_get_lease_time_ops,
|
|
.callback_data = &data,
|
|
.flags = RPC_TASK_TIMEOUT,
|
|
};
|
|
int status;
|
|
|
|
nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.la_seq_args);
|
|
dprintk("--> %s\n", __func__);
|
|
task = rpc_run_task(&task_setup);
|
|
|
|
if (IS_ERR(task))
|
|
status = PTR_ERR(task);
|
|
else {
|
|
status = task->tk_status;
|
|
rpc_put_task(task);
|
|
}
|
|
dprintk("<-- %s return %d\n", __func__, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Initialize the values to be used by the client in CREATE_SESSION
|
|
* If nfs4_init_session set the fore channel request and response sizes,
|
|
* use them.
|
|
*
|
|
* Set the back channel max_resp_sz_cached to zero to force the client to
|
|
* always set csa_cachethis to FALSE because the current implementation
|
|
* of the back channel DRC only supports caching the CB_SEQUENCE operation.
|
|
*/
|
|
static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
|
|
{
|
|
unsigned int max_rqst_sz, max_resp_sz;
|
|
|
|
max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
|
|
max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
|
|
|
|
/* Fore channel attributes */
|
|
args->fc_attrs.max_rqst_sz = max_rqst_sz;
|
|
args->fc_attrs.max_resp_sz = max_resp_sz;
|
|
args->fc_attrs.max_ops = NFS4_MAX_OPS;
|
|
args->fc_attrs.max_reqs = max_session_slots;
|
|
|
|
dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
|
|
"max_ops=%u max_reqs=%u\n",
|
|
__func__,
|
|
args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
|
|
args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
|
|
|
|
/* Back channel attributes */
|
|
args->bc_attrs.max_rqst_sz = PAGE_SIZE;
|
|
args->bc_attrs.max_resp_sz = PAGE_SIZE;
|
|
args->bc_attrs.max_resp_sz_cached = 0;
|
|
args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
|
|
args->bc_attrs.max_reqs = 1;
|
|
|
|
dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
|
|
"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
|
|
__func__,
|
|
args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
|
|
args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
|
|
args->bc_attrs.max_reqs);
|
|
}
|
|
|
|
static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
|
|
{
|
|
struct nfs4_channel_attrs *sent = &args->fc_attrs;
|
|
struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
|
|
|
|
if (rcvd->max_resp_sz > sent->max_resp_sz)
|
|
return -EINVAL;
|
|
/*
|
|
* Our requested max_ops is the minimum we need; we're not
|
|
* prepared to break up compounds into smaller pieces than that.
|
|
* So, no point even trying to continue if the server won't
|
|
* cooperate:
|
|
*/
|
|
if (rcvd->max_ops < sent->max_ops)
|
|
return -EINVAL;
|
|
if (rcvd->max_reqs == 0)
|
|
return -EINVAL;
|
|
if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
|
|
rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
|
|
{
|
|
struct nfs4_channel_attrs *sent = &args->bc_attrs;
|
|
struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
|
|
|
|
if (rcvd->max_rqst_sz > sent->max_rqst_sz)
|
|
return -EINVAL;
|
|
if (rcvd->max_resp_sz < sent->max_resp_sz)
|
|
return -EINVAL;
|
|
if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
|
|
return -EINVAL;
|
|
/* These would render the backchannel useless: */
|
|
if (rcvd->max_ops != sent->max_ops)
|
|
return -EINVAL;
|
|
if (rcvd->max_reqs != sent->max_reqs)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
|
|
struct nfs4_session *session)
|
|
{
|
|
int ret;
|
|
|
|
ret = nfs4_verify_fore_channel_attrs(args, session);
|
|
if (ret)
|
|
return ret;
|
|
return nfs4_verify_back_channel_attrs(args, session);
|
|
}
|
|
|
|
static int _nfs4_proc_create_session(struct nfs_client *clp,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_session *session = clp->cl_session;
|
|
struct nfs41_create_session_args args = {
|
|
.client = clp,
|
|
.cb_program = NFS4_CALLBACK,
|
|
};
|
|
struct nfs41_create_session_res res = {
|
|
.client = clp,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
nfs4_init_channel_attrs(&args);
|
|
args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
|
|
|
|
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_create_session(clp, status);
|
|
|
|
if (!status) {
|
|
/* Verify the session's negotiated channel_attrs values */
|
|
status = nfs4_verify_channel_attrs(&args, session);
|
|
/* Increment the clientid slot sequence id */
|
|
clp->cl_seqid++;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Issues a CREATE_SESSION operation to the server.
|
|
* It is the responsibility of the caller to verify the session is
|
|
* expired before calling this routine.
|
|
*/
|
|
int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
int status;
|
|
unsigned *ptr;
|
|
struct nfs4_session *session = clp->cl_session;
|
|
|
|
dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
|
|
|
|
status = _nfs4_proc_create_session(clp, cred);
|
|
if (status)
|
|
goto out;
|
|
|
|
/* Init or reset the session slot tables */
|
|
status = nfs4_setup_session_slot_tables(session);
|
|
dprintk("slot table setup returned %d\n", status);
|
|
if (status)
|
|
goto out;
|
|
|
|
ptr = (unsigned *)&session->sess_id.data[0];
|
|
dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
|
|
clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
|
|
out:
|
|
dprintk("<-- %s\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Issue the over-the-wire RPC DESTROY_SESSION.
|
|
* The caller must serialize access to this routine.
|
|
*/
|
|
int nfs4_proc_destroy_session(struct nfs4_session *session,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
|
|
.rpc_argp = session,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status = 0;
|
|
|
|
dprintk("--> nfs4_proc_destroy_session\n");
|
|
|
|
/* session is still being setup */
|
|
if (session->clp->cl_cons_state != NFS_CS_READY)
|
|
return status;
|
|
|
|
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
|
|
trace_nfs4_destroy_session(session->clp, status);
|
|
|
|
if (status)
|
|
dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
|
|
"Session has been destroyed regardless...\n", status);
|
|
|
|
dprintk("<-- nfs4_proc_destroy_session\n");
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Renew the cl_session lease.
|
|
*/
|
|
struct nfs4_sequence_data {
|
|
struct nfs_client *clp;
|
|
struct nfs4_sequence_args args;
|
|
struct nfs4_sequence_res res;
|
|
};
|
|
|
|
static void nfs41_sequence_release(void *data)
|
|
{
|
|
struct nfs4_sequence_data *calldata = data;
|
|
struct nfs_client *clp = calldata->clp;
|
|
|
|
if (atomic_read(&clp->cl_count) > 1)
|
|
nfs4_schedule_state_renewal(clp);
|
|
nfs_put_client(clp);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
|
|
{
|
|
switch(task->tk_status) {
|
|
case -NFS4ERR_DELAY:
|
|
rpc_delay(task, NFS4_POLL_RETRY_MAX);
|
|
return -EAGAIN;
|
|
default:
|
|
nfs4_schedule_lease_recovery(clp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_sequence_data *calldata = data;
|
|
struct nfs_client *clp = calldata->clp;
|
|
|
|
if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
|
|
return;
|
|
|
|
trace_nfs4_sequence(clp, task->tk_status);
|
|
if (task->tk_status < 0) {
|
|
dprintk("%s ERROR %d\n", __func__, task->tk_status);
|
|
if (atomic_read(&clp->cl_count) == 1)
|
|
goto out;
|
|
|
|
if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
}
|
|
dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
|
|
out:
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_sequence_data *calldata = data;
|
|
struct nfs_client *clp = calldata->clp;
|
|
struct nfs4_sequence_args *args;
|
|
struct nfs4_sequence_res *res;
|
|
|
|
args = task->tk_msg.rpc_argp;
|
|
res = task->tk_msg.rpc_resp;
|
|
|
|
nfs41_setup_sequence(clp->cl_session, args, res, task);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs41_sequence_ops = {
|
|
.rpc_call_done = nfs41_sequence_call_done,
|
|
.rpc_call_prepare = nfs41_sequence_prepare,
|
|
.rpc_release = nfs41_sequence_release,
|
|
};
|
|
|
|
static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
|
|
struct rpc_cred *cred,
|
|
bool is_privileged)
|
|
{
|
|
struct nfs4_sequence_data *calldata;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = clp->cl_rpcclient,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs41_sequence_ops,
|
|
.flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
|
|
};
|
|
|
|
if (!atomic_inc_not_zero(&clp->cl_count))
|
|
return ERR_PTR(-EIO);
|
|
calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
|
|
if (calldata == NULL) {
|
|
nfs_put_client(clp);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
nfs4_init_sequence(&calldata->args, &calldata->res, 0);
|
|
if (is_privileged)
|
|
nfs4_set_sequence_privileged(&calldata->args);
|
|
msg.rpc_argp = &calldata->args;
|
|
msg.rpc_resp = &calldata->res;
|
|
calldata->clp = clp;
|
|
task_setup_data.callback_data = calldata;
|
|
|
|
return rpc_run_task(&task_setup_data);
|
|
}
|
|
|
|
static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
|
|
{
|
|
struct rpc_task *task;
|
|
int ret = 0;
|
|
|
|
if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
|
|
return 0;
|
|
task = _nfs41_proc_sequence(clp, cred, false);
|
|
if (IS_ERR(task))
|
|
ret = PTR_ERR(task);
|
|
else
|
|
rpc_put_task_async(task);
|
|
dprintk("<-- %s status=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
struct rpc_task *task;
|
|
int ret;
|
|
|
|
task = _nfs41_proc_sequence(clp, cred, true);
|
|
if (IS_ERR(task)) {
|
|
ret = PTR_ERR(task);
|
|
goto out;
|
|
}
|
|
ret = rpc_wait_for_completion_task(task);
|
|
if (!ret) {
|
|
struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
|
|
|
|
if (task->tk_status == 0)
|
|
nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
|
|
ret = task->tk_status;
|
|
}
|
|
rpc_put_task(task);
|
|
out:
|
|
dprintk("<-- %s status=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
struct nfs4_reclaim_complete_data {
|
|
struct nfs_client *clp;
|
|
struct nfs41_reclaim_complete_args arg;
|
|
struct nfs41_reclaim_complete_res res;
|
|
};
|
|
|
|
static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_reclaim_complete_data *calldata = data;
|
|
|
|
nfs41_setup_sequence(calldata->clp->cl_session,
|
|
&calldata->arg.seq_args,
|
|
&calldata->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
|
|
{
|
|
switch(task->tk_status) {
|
|
case 0:
|
|
case -NFS4ERR_COMPLETE_ALREADY:
|
|
case -NFS4ERR_WRONG_CRED: /* What to do here? */
|
|
break;
|
|
case -NFS4ERR_DELAY:
|
|
rpc_delay(task, NFS4_POLL_RETRY_MAX);
|
|
/* fall through */
|
|
case -NFS4ERR_RETRY_UNCACHED_REP:
|
|
return -EAGAIN;
|
|
default:
|
|
nfs4_schedule_lease_recovery(clp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_reclaim_complete_data *calldata = data;
|
|
struct nfs_client *clp = calldata->clp;
|
|
struct nfs4_sequence_res *res = &calldata->res.seq_res;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
if (!nfs41_sequence_done(task, res))
|
|
return;
|
|
|
|
trace_nfs4_reclaim_complete(clp, task->tk_status);
|
|
if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static void nfs4_free_reclaim_complete_data(void *data)
|
|
{
|
|
struct nfs4_reclaim_complete_data *calldata = data;
|
|
|
|
kfree(calldata);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
|
|
.rpc_call_prepare = nfs4_reclaim_complete_prepare,
|
|
.rpc_call_done = nfs4_reclaim_complete_done,
|
|
.rpc_release = nfs4_free_reclaim_complete_data,
|
|
};
|
|
|
|
/*
|
|
* Issue a global reclaim complete.
|
|
*/
|
|
static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_reclaim_complete_data *calldata;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = clp->cl_rpcclient,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_reclaim_complete_call_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
|
|
if (calldata == NULL)
|
|
goto out;
|
|
calldata->clp = clp;
|
|
calldata->arg.one_fs = 0;
|
|
|
|
nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&calldata->arg.seq_args);
|
|
msg.rpc_argp = &calldata->arg;
|
|
msg.rpc_resp = &calldata->res;
|
|
task_setup_data.callback_data = calldata;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task)) {
|
|
status = PTR_ERR(task);
|
|
goto out;
|
|
}
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status == 0)
|
|
status = task->tk_status;
|
|
rpc_put_task(task);
|
|
return 0;
|
|
out:
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
static void
|
|
nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutget *lgp = calldata;
|
|
struct nfs_server *server = NFS_SERVER(lgp->args.inode);
|
|
struct nfs4_session *session = nfs4_get_session(server);
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
/* Note the is a race here, where a CB_LAYOUTRECALL can come in
|
|
* right now covering the LAYOUTGET we are about to send.
|
|
* However, that is not so catastrophic, and there seems
|
|
* to be no way to prevent it completely.
|
|
*/
|
|
if (nfs41_setup_sequence(session, &lgp->args.seq_args,
|
|
&lgp->res.seq_res, task))
|
|
return;
|
|
if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
|
|
NFS_I(lgp->args.inode)->layout,
|
|
lgp->args.ctx->state)) {
|
|
rpc_exit(task, NFS4_OK);
|
|
}
|
|
}
|
|
|
|
static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutget *lgp = calldata;
|
|
struct inode *inode = lgp->args.inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct pnfs_layout_hdr *lo;
|
|
struct nfs4_state *state = NULL;
|
|
unsigned long timeo, giveup;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
if (!nfs41_sequence_done(task, &lgp->res.seq_res))
|
|
goto out;
|
|
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
goto out;
|
|
case -NFS4ERR_LAYOUTTRYLATER:
|
|
case -NFS4ERR_RECALLCONFLICT:
|
|
timeo = rpc_get_timeout(task->tk_client);
|
|
giveup = lgp->args.timestamp + timeo;
|
|
if (time_after(giveup, jiffies))
|
|
task->tk_status = -NFS4ERR_DELAY;
|
|
break;
|
|
case -NFS4ERR_EXPIRED:
|
|
case -NFS4ERR_BAD_STATEID:
|
|
spin_lock(&inode->i_lock);
|
|
lo = NFS_I(inode)->layout;
|
|
if (!lo || list_empty(&lo->plh_segs)) {
|
|
spin_unlock(&inode->i_lock);
|
|
/* If the open stateid was bad, then recover it. */
|
|
state = lgp->args.ctx->state;
|
|
} else {
|
|
LIST_HEAD(head);
|
|
|
|
pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
|
|
spin_unlock(&inode->i_lock);
|
|
/* Mark the bad layout state as invalid, then
|
|
* retry using the open stateid. */
|
|
pnfs_free_lseg_list(&head);
|
|
}
|
|
}
|
|
if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
|
|
rpc_restart_call_prepare(task);
|
|
out:
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static size_t max_response_pages(struct nfs_server *server)
|
|
{
|
|
u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
|
|
return nfs_page_array_len(0, max_resp_sz);
|
|
}
|
|
|
|
static void nfs4_free_pages(struct page **pages, size_t size)
|
|
{
|
|
int i;
|
|
|
|
if (!pages)
|
|
return;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
if (!pages[i])
|
|
break;
|
|
__free_page(pages[i]);
|
|
}
|
|
kfree(pages);
|
|
}
|
|
|
|
static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
|
|
{
|
|
struct page **pages;
|
|
int i;
|
|
|
|
pages = kcalloc(size, sizeof(struct page *), gfp_flags);
|
|
if (!pages) {
|
|
dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < size; i++) {
|
|
pages[i] = alloc_page(gfp_flags);
|
|
if (!pages[i]) {
|
|
dprintk("%s: failed to allocate page\n", __func__);
|
|
nfs4_free_pages(pages, size);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return pages;
|
|
}
|
|
|
|
static void nfs4_layoutget_release(void *calldata)
|
|
{
|
|
struct nfs4_layoutget *lgp = calldata;
|
|
struct inode *inode = lgp->args.inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
size_t max_pages = max_response_pages(server);
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
nfs4_free_pages(lgp->args.layout.pages, max_pages);
|
|
pnfs_put_layout_hdr(NFS_I(inode)->layout);
|
|
put_nfs_open_context(lgp->args.ctx);
|
|
kfree(calldata);
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_layoutget_call_ops = {
|
|
.rpc_call_prepare = nfs4_layoutget_prepare,
|
|
.rpc_call_done = nfs4_layoutget_done,
|
|
.rpc_release = nfs4_layoutget_release,
|
|
};
|
|
|
|
struct pnfs_layout_segment *
|
|
nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
|
|
{
|
|
struct inode *inode = lgp->args.inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
size_t max_pages = max_response_pages(server);
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
|
|
.rpc_argp = &lgp->args,
|
|
.rpc_resp = &lgp->res,
|
|
.rpc_cred = lgp->cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_layoutget_call_ops,
|
|
.callback_data = lgp,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
struct pnfs_layout_segment *lseg = NULL;
|
|
int status = 0;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
|
|
if (!lgp->args.layout.pages) {
|
|
nfs4_layoutget_release(lgp);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
lgp->args.layout.pglen = max_pages * PAGE_SIZE;
|
|
lgp->args.timestamp = jiffies;
|
|
|
|
lgp->res.layoutp = &lgp->args.layout;
|
|
lgp->res.seq_res.sr_slot = NULL;
|
|
nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
|
|
|
|
/* nfs4_layoutget_release calls pnfs_put_layout_hdr */
|
|
pnfs_get_layout_hdr(NFS_I(inode)->layout);
|
|
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return ERR_CAST(task);
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status == 0)
|
|
status = task->tk_status;
|
|
trace_nfs4_layoutget(lgp->args.ctx,
|
|
&lgp->args.range,
|
|
&lgp->res.range,
|
|
status);
|
|
/* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
|
|
if (status == 0 && lgp->res.layoutp->len)
|
|
lseg = pnfs_layout_process(lgp);
|
|
rpc_put_task(task);
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
if (status)
|
|
return ERR_PTR(status);
|
|
return lseg;
|
|
}
|
|
|
|
static void
|
|
nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutreturn *lrp = calldata;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
nfs41_setup_sequence(lrp->clp->cl_session,
|
|
&lrp->args.seq_args,
|
|
&lrp->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutreturn *lrp = calldata;
|
|
struct nfs_server *server;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
if (!nfs41_sequence_done(task, &lrp->res.seq_res))
|
|
return;
|
|
|
|
server = NFS_SERVER(lrp->args.inode);
|
|
if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static void nfs4_layoutreturn_release(void *calldata)
|
|
{
|
|
struct nfs4_layoutreturn *lrp = calldata;
|
|
struct pnfs_layout_hdr *lo = lrp->args.layout;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
spin_lock(&lo->plh_inode->i_lock);
|
|
if (lrp->res.lrs_present)
|
|
pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
|
|
lo->plh_block_lgets--;
|
|
spin_unlock(&lo->plh_inode->i_lock);
|
|
pnfs_put_layout_hdr(lrp->args.layout);
|
|
kfree(calldata);
|
|
dprintk("<-- %s\n", __func__);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
|
|
.rpc_call_prepare = nfs4_layoutreturn_prepare,
|
|
.rpc_call_done = nfs4_layoutreturn_done,
|
|
.rpc_release = nfs4_layoutreturn_release,
|
|
};
|
|
|
|
int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
|
|
{
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
|
|
.rpc_argp = &lrp->args,
|
|
.rpc_resp = &lrp->res,
|
|
.rpc_cred = lrp->cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = NFS_SERVER(lrp->args.inode)->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_layoutreturn_call_ops,
|
|
.callback_data = lrp,
|
|
};
|
|
int status;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = task->tk_status;
|
|
trace_nfs4_layoutreturn(lrp->args.inode, status);
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Retrieve the list of Data Server devices from the MDS.
|
|
*/
|
|
static int _nfs4_getdevicelist(struct nfs_server *server,
|
|
const struct nfs_fh *fh,
|
|
struct pnfs_devicelist *devlist)
|
|
{
|
|
struct nfs4_getdevicelist_args args = {
|
|
.fh = fh,
|
|
.layoutclass = server->pnfs_curr_ld->id,
|
|
};
|
|
struct nfs4_getdevicelist_res res = {
|
|
.devlist = devlist,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
|
|
&res.seq_res, 0);
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_getdevicelist(struct nfs_server *server,
|
|
const struct nfs_fh *fh,
|
|
struct pnfs_devicelist *devlist)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_getdevicelist(server, fh, devlist),
|
|
&exception);
|
|
} while (exception.retry);
|
|
|
|
dprintk("%s: err=%d, num_devs=%u\n", __func__,
|
|
err, devlist->num_devs);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
|
|
|
|
static int
|
|
_nfs4_proc_getdeviceinfo(struct nfs_server *server,
|
|
struct pnfs_device *pdev,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_getdeviceinfo_args args = {
|
|
.pdev = pdev,
|
|
};
|
|
struct nfs4_getdeviceinfo_res res = {
|
|
.pdev = pdev,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_getdeviceinfo(struct nfs_server *server,
|
|
struct pnfs_device *pdev,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_getdeviceinfo(server, pdev, cred),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
|
|
|
|
static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutcommit_data *data = calldata;
|
|
struct nfs_server *server = NFS_SERVER(data->args.inode);
|
|
struct nfs4_session *session = nfs4_get_session(server);
|
|
|
|
nfs41_setup_sequence(session,
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static void
|
|
nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_layoutcommit_data *data = calldata;
|
|
struct nfs_server *server = NFS_SERVER(data->args.inode);
|
|
|
|
if (!nfs41_sequence_done(task, &data->res.seq_res))
|
|
return;
|
|
|
|
switch (task->tk_status) { /* Just ignore these failures */
|
|
case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
|
|
case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
|
|
case -NFS4ERR_BADLAYOUT: /* no layout */
|
|
case -NFS4ERR_GRACE: /* loca_recalim always false */
|
|
task->tk_status = 0;
|
|
break;
|
|
case 0:
|
|
nfs_post_op_update_inode_force_wcc(data->args.inode,
|
|
data->res.fattr);
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
|
|
rpc_restart_call_prepare(task);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void nfs4_layoutcommit_release(void *calldata)
|
|
{
|
|
struct nfs4_layoutcommit_data *data = calldata;
|
|
|
|
pnfs_cleanup_layoutcommit(data);
|
|
put_rpccred(data->cred);
|
|
kfree(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_layoutcommit_ops = {
|
|
.rpc_call_prepare = nfs4_layoutcommit_prepare,
|
|
.rpc_call_done = nfs4_layoutcommit_done,
|
|
.rpc_release = nfs4_layoutcommit_release,
|
|
};
|
|
|
|
int
|
|
nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
|
|
.rpc_argp = &data->args,
|
|
.rpc_resp = &data->res,
|
|
.rpc_cred = data->cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.task = &data->task,
|
|
.rpc_client = NFS_CLIENT(data->args.inode),
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_layoutcommit_ops,
|
|
.callback_data = data,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
struct rpc_task *task;
|
|
int status = 0;
|
|
|
|
dprintk("NFS: %4d initiating layoutcommit call. sync %d "
|
|
"lbw: %llu inode %lu\n",
|
|
data->task.tk_pid, sync,
|
|
data->args.lastbytewritten,
|
|
data->args.inode->i_ino);
|
|
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
if (sync == false)
|
|
goto out;
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0)
|
|
goto out;
|
|
status = task->tk_status;
|
|
trace_nfs4_layoutcommit(data->args.inode, status);
|
|
out:
|
|
dprintk("%s: status %d\n", __func__, status);
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
|
|
* possible) as per RFC3530bis and RFC5661 Security Considerations sections
|
|
*/
|
|
static int
|
|
_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info,
|
|
struct nfs4_secinfo_flavors *flavors, bool use_integrity)
|
|
{
|
|
struct nfs41_secinfo_no_name_args args = {
|
|
.style = SECINFO_STYLE_CURRENT_FH,
|
|
};
|
|
struct nfs4_secinfo_res res = {
|
|
.flavors = flavors,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
struct rpc_clnt *clnt = server->client;
|
|
struct rpc_cred *cred = NULL;
|
|
int status;
|
|
|
|
if (use_integrity) {
|
|
clnt = server->nfs_client->cl_rpcclient;
|
|
cred = nfs4_get_clid_cred(server->nfs_client);
|
|
msg.rpc_cred = cred;
|
|
}
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
|
|
&res.seq_res, 0);
|
|
dprintk("<-- %s status=%d\n", __func__, status);
|
|
|
|
if (cred)
|
|
put_rpccred(cred);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int
|
|
nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
/* first try using integrity protection */
|
|
err = -NFS4ERR_WRONGSEC;
|
|
|
|
/* try to use integrity protection with machine cred */
|
|
if (_nfs4_is_integrity_protected(server->nfs_client))
|
|
err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
|
|
flavors, true);
|
|
|
|
/*
|
|
* if unable to use integrity protection, or SECINFO with
|
|
* integrity protection returns NFS4ERR_WRONGSEC (which is
|
|
* disallowed by spec, but exists in deployed servers) use
|
|
* the current filesystem's rpc_client and the user cred.
|
|
*/
|
|
if (err == -NFS4ERR_WRONGSEC)
|
|
err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
|
|
flavors, false);
|
|
|
|
switch (err) {
|
|
case 0:
|
|
case -NFS4ERR_WRONGSEC:
|
|
case -NFS4ERR_NOTSUPP:
|
|
goto out;
|
|
default:
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
}
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
int err;
|
|
struct page *page;
|
|
rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
|
|
struct nfs4_secinfo_flavors *flavors;
|
|
struct nfs4_secinfo4 *secinfo;
|
|
int i;
|
|
|
|
page = alloc_page(GFP_KERNEL);
|
|
if (!page) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
flavors = page_address(page);
|
|
err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
|
|
|
|
/*
|
|
* Fall back on "guess and check" method if
|
|
* the server doesn't support SECINFO_NO_NAME
|
|
*/
|
|
if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
|
|
err = nfs4_find_root_sec(server, fhandle, info);
|
|
goto out_freepage;
|
|
}
|
|
if (err)
|
|
goto out_freepage;
|
|
|
|
for (i = 0; i < flavors->num_flavors; i++) {
|
|
secinfo = &flavors->flavors[i];
|
|
|
|
switch (secinfo->flavor) {
|
|
case RPC_AUTH_NULL:
|
|
case RPC_AUTH_UNIX:
|
|
case RPC_AUTH_GSS:
|
|
flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
|
|
&secinfo->flavor_info);
|
|
break;
|
|
default:
|
|
flavor = RPC_AUTH_MAXFLAVOR;
|
|
break;
|
|
}
|
|
|
|
if (!nfs_auth_info_match(&server->auth_info, flavor))
|
|
flavor = RPC_AUTH_MAXFLAVOR;
|
|
|
|
if (flavor != RPC_AUTH_MAXFLAVOR) {
|
|
err = nfs4_lookup_root_sec(server, fhandle,
|
|
info, flavor);
|
|
if (!err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (flavor == RPC_AUTH_MAXFLAVOR)
|
|
err = -EPERM;
|
|
|
|
out_freepage:
|
|
put_page(page);
|
|
if (err == -EACCES)
|
|
return -EPERM;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int _nfs41_test_stateid(struct nfs_server *server,
|
|
nfs4_stateid *stateid,
|
|
struct rpc_cred *cred)
|
|
{
|
|
int status;
|
|
struct nfs41_test_stateid_args args = {
|
|
.stateid = stateid,
|
|
};
|
|
struct nfs41_test_stateid_res res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_clnt *rpc_client = server->client;
|
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
|
|
&rpc_client, &msg);
|
|
|
|
dprintk("NFS call test_stateid %p\n", stateid);
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
|
|
nfs4_set_sequence_privileged(&args.seq_args);
|
|
status = nfs4_call_sync_sequence(rpc_client, server, &msg,
|
|
&args.seq_args, &res.seq_res);
|
|
if (status != NFS_OK) {
|
|
dprintk("NFS reply test_stateid: failed, %d\n", status);
|
|
return status;
|
|
}
|
|
dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
|
|
return -res.status;
|
|
}
|
|
|
|
/**
|
|
* nfs41_test_stateid - perform a TEST_STATEID operation
|
|
*
|
|
* @server: server / transport on which to perform the operation
|
|
* @stateid: state ID to test
|
|
* @cred: credential
|
|
*
|
|
* Returns NFS_OK if the server recognizes that "stateid" is valid.
|
|
* Otherwise a negative NFS4ERR value is returned if the operation
|
|
* failed or the state ID is not currently valid.
|
|
*/
|
|
static int nfs41_test_stateid(struct nfs_server *server,
|
|
nfs4_stateid *stateid,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs41_test_stateid(server, stateid, cred);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
struct nfs_free_stateid_data {
|
|
struct nfs_server *server;
|
|
struct nfs41_free_stateid_args args;
|
|
struct nfs41_free_stateid_res res;
|
|
};
|
|
|
|
static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs_free_stateid_data *data = calldata;
|
|
nfs41_setup_sequence(nfs4_get_session(data->server),
|
|
&data->args.seq_args,
|
|
&data->res.seq_res,
|
|
task);
|
|
}
|
|
|
|
static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs_free_stateid_data *data = calldata;
|
|
|
|
nfs41_sequence_done(task, &data->res.seq_res);
|
|
|
|
switch (task->tk_status) {
|
|
case -NFS4ERR_DELAY:
|
|
if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
|
|
rpc_restart_call_prepare(task);
|
|
}
|
|
}
|
|
|
|
static void nfs41_free_stateid_release(void *calldata)
|
|
{
|
|
kfree(calldata);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs41_free_stateid_ops = {
|
|
.rpc_call_prepare = nfs41_free_stateid_prepare,
|
|
.rpc_call_done = nfs41_free_stateid_done,
|
|
.rpc_release = nfs41_free_stateid_release,
|
|
};
|
|
|
|
static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
|
|
nfs4_stateid *stateid,
|
|
struct rpc_cred *cred,
|
|
bool privileged)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_task_setup task_setup = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs41_free_stateid_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
struct nfs_free_stateid_data *data;
|
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
|
|
&task_setup.rpc_client, &msg);
|
|
|
|
dprintk("NFS call free_stateid %p\n", stateid);
|
|
data = kmalloc(sizeof(*data), GFP_NOFS);
|
|
if (!data)
|
|
return ERR_PTR(-ENOMEM);
|
|
data->server = server;
|
|
nfs4_stateid_copy(&data->args.stateid, stateid);
|
|
|
|
task_setup.callback_data = data;
|
|
|
|
msg.rpc_argp = &data->args;
|
|
msg.rpc_resp = &data->res;
|
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
|
|
if (privileged)
|
|
nfs4_set_sequence_privileged(&data->args.seq_args);
|
|
|
|
return rpc_run_task(&task_setup);
|
|
}
|
|
|
|
/**
|
|
* nfs41_free_stateid - perform a FREE_STATEID operation
|
|
*
|
|
* @server: server / transport on which to perform the operation
|
|
* @stateid: state ID to release
|
|
* @cred: credential
|
|
*
|
|
* Returns NFS_OK if the server freed "stateid". Otherwise a
|
|
* negative NFS4ERR value is returned.
|
|
*/
|
|
static int nfs41_free_stateid(struct nfs_server *server,
|
|
nfs4_stateid *stateid,
|
|
struct rpc_cred *cred)
|
|
{
|
|
struct rpc_task *task;
|
|
int ret;
|
|
|
|
task = _nfs41_free_stateid(server, stateid, cred, true);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
ret = rpc_wait_for_completion_task(task);
|
|
if (!ret)
|
|
ret = task->tk_status;
|
|
rpc_put_task(task);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
|
|
{
|
|
struct rpc_task *task;
|
|
struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
|
|
|
|
task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
|
|
nfs4_free_lock_state(server, lsp);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
rpc_put_task(task);
|
|
return 0;
|
|
}
|
|
|
|
static bool nfs41_match_stateid(const nfs4_stateid *s1,
|
|
const nfs4_stateid *s2)
|
|
{
|
|
if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
|
|
return false;
|
|
|
|
if (s1->seqid == s2->seqid)
|
|
return true;
|
|
if (s1->seqid == 0 || s2->seqid == 0)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static bool nfs4_match_stateid(const nfs4_stateid *s1,
|
|
const nfs4_stateid *s2)
|
|
{
|
|
return nfs4_stateid_match(s1, s2);
|
|
}
|
|
|
|
|
|
static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
|
|
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
|
|
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
|
|
.recover_open = nfs4_open_reclaim,
|
|
.recover_lock = nfs4_lock_reclaim,
|
|
.establish_clid = nfs4_init_clientid,
|
|
.detect_trunking = nfs40_discover_server_trunking,
|
|
};
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
|
|
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
|
|
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
|
|
.recover_open = nfs4_open_reclaim,
|
|
.recover_lock = nfs4_lock_reclaim,
|
|
.establish_clid = nfs41_init_clientid,
|
|
.reclaim_complete = nfs41_proc_reclaim_complete,
|
|
.detect_trunking = nfs41_discover_server_trunking,
|
|
};
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
|
|
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
|
|
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
|
|
.recover_open = nfs4_open_expired,
|
|
.recover_lock = nfs4_lock_expired,
|
|
.establish_clid = nfs4_init_clientid,
|
|
};
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
|
|
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
|
|
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
|
|
.recover_open = nfs41_open_expired,
|
|
.recover_lock = nfs41_lock_expired,
|
|
.establish_clid = nfs41_init_clientid,
|
|
};
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
|
|
.sched_state_renewal = nfs4_proc_async_renew,
|
|
.get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
|
|
.renew_lease = nfs4_proc_renew,
|
|
};
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
|
|
.sched_state_renewal = nfs41_proc_async_sequence,
|
|
.get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
|
|
.renew_lease = nfs4_proc_sequence,
|
|
};
|
|
#endif
|
|
|
|
static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
|
|
.get_locations = _nfs40_proc_get_locations,
|
|
.fsid_present = _nfs40_proc_fsid_present,
|
|
};
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
|
|
.get_locations = _nfs41_proc_get_locations,
|
|
.fsid_present = _nfs41_proc_fsid_present,
|
|
};
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
|
|
.minor_version = 0,
|
|
.init_caps = NFS_CAP_READDIRPLUS
|
|
| NFS_CAP_ATOMIC_OPEN
|
|
| NFS_CAP_CHANGE_ATTR
|
|
| NFS_CAP_POSIX_LOCK,
|
|
.init_client = nfs40_init_client,
|
|
.shutdown_client = nfs40_shutdown_client,
|
|
.match_stateid = nfs4_match_stateid,
|
|
.find_root_sec = nfs4_find_root_sec,
|
|
.free_lock_state = nfs4_release_lockowner,
|
|
.call_sync_ops = &nfs40_call_sync_ops,
|
|
.reboot_recovery_ops = &nfs40_reboot_recovery_ops,
|
|
.nograce_recovery_ops = &nfs40_nograce_recovery_ops,
|
|
.state_renewal_ops = &nfs40_state_renewal_ops,
|
|
.mig_recovery_ops = &nfs40_mig_recovery_ops,
|
|
};
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
|
|
.minor_version = 1,
|
|
.init_caps = NFS_CAP_READDIRPLUS
|
|
| NFS_CAP_ATOMIC_OPEN
|
|
| NFS_CAP_CHANGE_ATTR
|
|
| NFS_CAP_POSIX_LOCK
|
|
| NFS_CAP_STATEID_NFSV41
|
|
| NFS_CAP_ATOMIC_OPEN_V1,
|
|
.init_client = nfs41_init_client,
|
|
.shutdown_client = nfs41_shutdown_client,
|
|
.match_stateid = nfs41_match_stateid,
|
|
.find_root_sec = nfs41_find_root_sec,
|
|
.free_lock_state = nfs41_free_lock_state,
|
|
.call_sync_ops = &nfs41_call_sync_ops,
|
|
.reboot_recovery_ops = &nfs41_reboot_recovery_ops,
|
|
.nograce_recovery_ops = &nfs41_nograce_recovery_ops,
|
|
.state_renewal_ops = &nfs41_state_renewal_ops,
|
|
.mig_recovery_ops = &nfs41_mig_recovery_ops,
|
|
};
|
|
#endif
|
|
|
|
#if defined(CONFIG_NFS_V4_2)
|
|
static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
|
|
.minor_version = 2,
|
|
.init_caps = NFS_CAP_READDIRPLUS
|
|
| NFS_CAP_ATOMIC_OPEN
|
|
| NFS_CAP_CHANGE_ATTR
|
|
| NFS_CAP_POSIX_LOCK
|
|
| NFS_CAP_STATEID_NFSV41
|
|
| NFS_CAP_ATOMIC_OPEN_V1,
|
|
.init_client = nfs41_init_client,
|
|
.shutdown_client = nfs41_shutdown_client,
|
|
.match_stateid = nfs41_match_stateid,
|
|
.find_root_sec = nfs41_find_root_sec,
|
|
.free_lock_state = nfs41_free_lock_state,
|
|
.call_sync_ops = &nfs41_call_sync_ops,
|
|
.reboot_recovery_ops = &nfs41_reboot_recovery_ops,
|
|
.nograce_recovery_ops = &nfs41_nograce_recovery_ops,
|
|
.state_renewal_ops = &nfs41_state_renewal_ops,
|
|
};
|
|
#endif
|
|
|
|
const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
|
|
[0] = &nfs_v4_0_minor_ops,
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
[1] = &nfs_v4_1_minor_ops,
|
|
#endif
|
|
#if defined(CONFIG_NFS_V4_2)
|
|
[2] = &nfs_v4_2_minor_ops,
|
|
#endif
|
|
};
|
|
|
|
static const struct inode_operations nfs4_dir_inode_operations = {
|
|
.create = nfs_create,
|
|
.lookup = nfs_lookup,
|
|
.atomic_open = nfs_atomic_open,
|
|
.link = nfs_link,
|
|
.unlink = nfs_unlink,
|
|
.symlink = nfs_symlink,
|
|
.mkdir = nfs_mkdir,
|
|
.rmdir = nfs_rmdir,
|
|
.mknod = nfs_mknod,
|
|
.rename = nfs_rename,
|
|
.permission = nfs_permission,
|
|
.getattr = nfs_getattr,
|
|
.setattr = nfs_setattr,
|
|
.getxattr = generic_getxattr,
|
|
.setxattr = generic_setxattr,
|
|
.listxattr = generic_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
};
|
|
|
|
static const struct inode_operations nfs4_file_inode_operations = {
|
|
.permission = nfs_permission,
|
|
.getattr = nfs_getattr,
|
|
.setattr = nfs_setattr,
|
|
.getxattr = generic_getxattr,
|
|
.setxattr = generic_setxattr,
|
|
.listxattr = generic_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
};
|
|
|
|
const struct nfs_rpc_ops nfs_v4_clientops = {
|
|
.version = 4, /* protocol version */
|
|
.dentry_ops = &nfs4_dentry_operations,
|
|
.dir_inode_ops = &nfs4_dir_inode_operations,
|
|
.file_inode_ops = &nfs4_file_inode_operations,
|
|
.file_ops = &nfs4_file_operations,
|
|
.getroot = nfs4_proc_get_root,
|
|
.submount = nfs4_submount,
|
|
.try_mount = nfs4_try_mount,
|
|
.getattr = nfs4_proc_getattr,
|
|
.setattr = nfs4_proc_setattr,
|
|
.lookup = nfs4_proc_lookup,
|
|
.access = nfs4_proc_access,
|
|
.readlink = nfs4_proc_readlink,
|
|
.create = nfs4_proc_create,
|
|
.remove = nfs4_proc_remove,
|
|
.unlink_setup = nfs4_proc_unlink_setup,
|
|
.unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
|
|
.unlink_done = nfs4_proc_unlink_done,
|
|
.rename = nfs4_proc_rename,
|
|
.rename_setup = nfs4_proc_rename_setup,
|
|
.rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
|
|
.rename_done = nfs4_proc_rename_done,
|
|
.link = nfs4_proc_link,
|
|
.symlink = nfs4_proc_symlink,
|
|
.mkdir = nfs4_proc_mkdir,
|
|
.rmdir = nfs4_proc_remove,
|
|
.readdir = nfs4_proc_readdir,
|
|
.mknod = nfs4_proc_mknod,
|
|
.statfs = nfs4_proc_statfs,
|
|
.fsinfo = nfs4_proc_fsinfo,
|
|
.pathconf = nfs4_proc_pathconf,
|
|
.set_capabilities = nfs4_server_capabilities,
|
|
.decode_dirent = nfs4_decode_dirent,
|
|
.read_setup = nfs4_proc_read_setup,
|
|
.read_pageio_init = pnfs_pageio_init_read,
|
|
.read_rpc_prepare = nfs4_proc_read_rpc_prepare,
|
|
.read_done = nfs4_read_done,
|
|
.write_setup = nfs4_proc_write_setup,
|
|
.write_pageio_init = pnfs_pageio_init_write,
|
|
.write_rpc_prepare = nfs4_proc_write_rpc_prepare,
|
|
.write_done = nfs4_write_done,
|
|
.commit_setup = nfs4_proc_commit_setup,
|
|
.commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
|
|
.commit_done = nfs4_commit_done,
|
|
.lock = nfs4_proc_lock,
|
|
.clear_acl_cache = nfs4_zap_acl_attr,
|
|
.close_context = nfs4_close_context,
|
|
.open_context = nfs4_atomic_open,
|
|
.have_delegation = nfs4_have_delegation,
|
|
.return_delegation = nfs4_inode_return_delegation,
|
|
.alloc_client = nfs4_alloc_client,
|
|
.init_client = nfs4_init_client,
|
|
.free_client = nfs4_free_client,
|
|
.create_server = nfs4_create_server,
|
|
.clone_server = nfs_clone_server,
|
|
};
|
|
|
|
static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
|
|
.prefix = XATTR_NAME_NFSV4_ACL,
|
|
.list = nfs4_xattr_list_nfs4_acl,
|
|
.get = nfs4_xattr_get_nfs4_acl,
|
|
.set = nfs4_xattr_set_nfs4_acl,
|
|
};
|
|
|
|
const struct xattr_handler *nfs4_xattr_handlers[] = {
|
|
&nfs4_xattr_nfs4_acl_handler,
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
|
|
&nfs4_xattr_nfs4_label_handler,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|