![Al Viro](/assets/img/avatar_default.png)
seeing that "fast" symlinks still get allocation + copy, we might as well simply switch them to pagecache-based variant of ->follow_link(); just need an appropriate ->readpage() for them... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2502 lines
60 KiB
C
2502 lines
60 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* namei.c
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*
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* Create and rename file, directory, symlinks
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* Portions of this code from linux/fs/ext3/dir.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/fs/minix/dir.c
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*
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* Copyright (C) 1991, 1992 Linux Torvalds
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/quotaops.h>
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "alloc.h"
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#include "dcache.h"
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#include "dir.h"
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#include "dlmglue.h"
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#include "extent_map.h"
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#include "file.h"
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#include "inode.h"
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#include "journal.h"
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#include "namei.h"
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#include "suballoc.h"
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#include "super.h"
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#include "symlink.h"
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#include "sysfile.h"
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#include "uptodate.h"
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#include "xattr.h"
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#include "acl.h"
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#include "ocfs2_trace.h"
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#include "buffer_head_io.h"
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static int ocfs2_mknod_locked(struct ocfs2_super *osb,
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struct inode *dir,
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struct inode *inode,
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dev_t dev,
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struct buffer_head **new_fe_bh,
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struct buffer_head *parent_fe_bh,
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handle_t *handle,
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struct ocfs2_alloc_context *inode_ac);
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static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
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struct inode **ret_orphan_dir,
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u64 blkno,
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char *name,
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struct ocfs2_dir_lookup_result *lookup);
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static int ocfs2_orphan_add(struct ocfs2_super *osb,
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handle_t *handle,
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struct inode *inode,
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struct buffer_head *fe_bh,
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char *name,
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struct ocfs2_dir_lookup_result *lookup,
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struct inode *orphan_dir_inode);
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static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
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handle_t *handle,
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struct inode *inode,
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const char *symname);
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|
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/* An orphan dir name is an 8 byte value, printed as a hex string */
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#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
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static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
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struct nameidata *nd)
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{
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int status;
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u64 blkno;
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struct inode *inode = NULL;
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struct dentry *ret;
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struct ocfs2_inode_info *oi;
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|
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trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
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dentry->d_name.name,
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(unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
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if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
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ret = ERR_PTR(-ENAMETOOLONG);
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goto bail;
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}
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status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
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if (status < 0) {
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if (status != -ENOENT)
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mlog_errno(status);
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ret = ERR_PTR(status);
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goto bail;
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}
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status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
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dentry->d_name.len, &blkno);
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if (status < 0)
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goto bail_add;
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inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
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if (IS_ERR(inode)) {
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ret = ERR_PTR(-EACCES);
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goto bail_unlock;
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}
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oi = OCFS2_I(inode);
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/* Clear any orphaned state... If we were able to look up the
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* inode from a directory, it certainly can't be orphaned. We
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* might have the bad state from a node which intended to
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* orphan this inode but crashed before it could commit the
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* unlink. */
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spin_lock(&oi->ip_lock);
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oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
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spin_unlock(&oi->ip_lock);
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bail_add:
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ret = d_splice_alias(inode, dentry);
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if (inode) {
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/*
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* If d_splice_alias() finds a DCACHE_DISCONNECTED
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* dentry, it will d_move() it on top of ourse. The
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* return value will indicate this however, so in
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* those cases, we switch them around for the locking
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* code.
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*
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* NOTE: This dentry already has ->d_op set from
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* ocfs2_get_parent() and ocfs2_get_dentry()
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*/
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if (ret)
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dentry = ret;
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status = ocfs2_dentry_attach_lock(dentry, inode,
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OCFS2_I(dir)->ip_blkno);
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if (status) {
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mlog_errno(status);
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ret = ERR_PTR(status);
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goto bail_unlock;
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}
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} else
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ocfs2_dentry_attach_gen(dentry);
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bail_unlock:
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/* Don't drop the cluster lock until *after* the d_add --
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* unlink on another node will message us to remove that
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* dentry under this lock so otherwise we can race this with
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* the downconvert thread and have a stale dentry. */
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ocfs2_inode_unlock(dir, 0);
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bail:
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trace_ocfs2_lookup_ret(ret);
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return ret;
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}
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static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
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{
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struct inode *inode;
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inode = new_inode(dir->i_sb);
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if (!inode) {
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mlog(ML_ERROR, "new_inode failed!\n");
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return NULL;
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}
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/* populate as many fields early on as possible - many of
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* these are used by the support functions here and in
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* callers. */
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if (S_ISDIR(mode))
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set_nlink(inode, 2);
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inode_init_owner(inode, dir, mode);
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dquot_initialize(inode);
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return inode;
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}
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static int ocfs2_mknod(struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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dev_t dev)
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{
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int status = 0;
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struct buffer_head *parent_fe_bh = NULL;
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handle_t *handle = NULL;
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struct ocfs2_super *osb;
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struct ocfs2_dinode *dirfe;
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struct buffer_head *new_fe_bh = NULL;
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struct inode *inode = NULL;
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struct ocfs2_alloc_context *inode_ac = NULL;
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struct ocfs2_alloc_context *data_ac = NULL;
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struct ocfs2_alloc_context *meta_ac = NULL;
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int want_clusters = 0;
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int want_meta = 0;
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int xattr_credits = 0;
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struct ocfs2_security_xattr_info si = {
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.enable = 1,
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};
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int did_quota_inode = 0;
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struct ocfs2_dir_lookup_result lookup = { NULL, };
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sigset_t oldset;
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int did_block_signals = 0;
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trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
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(unsigned long long)OCFS2_I(dir)->ip_blkno,
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(unsigned long)dev, mode);
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dquot_initialize(dir);
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/* get our super block */
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osb = OCFS2_SB(dir->i_sb);
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status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
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if (status < 0) {
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if (status != -ENOENT)
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mlog_errno(status);
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return status;
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}
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if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
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status = -EMLINK;
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goto leave;
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}
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dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
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if (!ocfs2_read_links_count(dirfe)) {
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/* can't make a file in a deleted directory. */
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status = -ENOENT;
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goto leave;
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}
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status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
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dentry->d_name.len);
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if (status)
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goto leave;
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/* get a spot inside the dir. */
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status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
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dentry->d_name.name,
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dentry->d_name.len, &lookup);
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if (status < 0) {
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mlog_errno(status);
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goto leave;
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}
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|
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/* reserve an inode spot */
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status = ocfs2_reserve_new_inode(osb, &inode_ac);
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if (status < 0) {
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if (status != -ENOSPC)
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mlog_errno(status);
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goto leave;
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}
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inode = ocfs2_get_init_inode(dir, mode);
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if (!inode) {
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status = -ENOMEM;
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mlog_errno(status);
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goto leave;
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}
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|
|
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/* get security xattr */
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status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
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if (status) {
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if (status == -EOPNOTSUPP)
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si.enable = 0;
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else {
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mlog_errno(status);
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goto leave;
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}
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}
|
|
|
|
/* calculate meta data/clusters for setting security and acl xattr */
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status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
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&si, &want_clusters,
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&xattr_credits, &want_meta);
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if (status < 0) {
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mlog_errno(status);
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goto leave;
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}
|
|
|
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/* Reserve a cluster if creating an extent based directory. */
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if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
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want_clusters += 1;
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|
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/* Dir indexing requires extra space as well */
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if (ocfs2_supports_indexed_dirs(osb))
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want_meta++;
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}
|
|
|
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status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
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if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
|
|
if (status < 0) {
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if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
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S_ISDIR(mode),
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xattr_credits));
|
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if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
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goto leave;
|
|
}
|
|
|
|
/* Starting to change things, restart is no longer possible. */
|
|
ocfs2_block_signals(&oldset);
|
|
did_block_signals = 1;
|
|
|
|
status = dquot_alloc_inode(inode);
|
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if (status)
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goto leave;
|
|
did_quota_inode = 1;
|
|
|
|
/* do the real work now. */
|
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status = ocfs2_mknod_locked(osb, dir, inode, dev,
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&new_fe_bh, parent_fe_bh, handle,
|
|
inode_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (S_ISDIR(mode)) {
|
|
status = ocfs2_fill_new_dir(osb, handle, dir, inode,
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new_fe_bh, data_ac, meta_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
|
|
parent_fe_bh,
|
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OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
ocfs2_add_links_count(dirfe, 1);
|
|
ocfs2_journal_dirty(handle, parent_fe_bh);
|
|
inc_nlink(dir);
|
|
}
|
|
|
|
status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
|
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meta_ac, data_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (si.enable) {
|
|
status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
|
|
meta_ac, data_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do this before adding the entry to the directory. We add
|
|
* also set d_op after success so that ->d_iput() will cleanup
|
|
* the dentry lock even if ocfs2_add_entry() fails below.
|
|
*/
|
|
status = ocfs2_dentry_attach_lock(dentry, inode,
|
|
OCFS2_I(dir)->ip_blkno);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_add_entry(handle, dentry, inode,
|
|
OCFS2_I(inode)->ip_blkno, parent_fe_bh,
|
|
&lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
insert_inode_hash(inode);
|
|
d_instantiate(dentry, inode);
|
|
status = 0;
|
|
leave:
|
|
if (status < 0 && did_quota_inode)
|
|
dquot_free_inode(inode);
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
ocfs2_inode_unlock(dir, 1);
|
|
if (did_block_signals)
|
|
ocfs2_unblock_signals(&oldset);
|
|
|
|
brelse(new_fe_bh);
|
|
brelse(parent_fe_bh);
|
|
kfree(si.name);
|
|
kfree(si.value);
|
|
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
|
|
if (inode_ac)
|
|
ocfs2_free_alloc_context(inode_ac);
|
|
|
|
if (data_ac)
|
|
ocfs2_free_alloc_context(data_ac);
|
|
|
|
if (meta_ac)
|
|
ocfs2_free_alloc_context(meta_ac);
|
|
|
|
/*
|
|
* We should call iput after the i_mutex of the bitmap been
|
|
* unlocked in ocfs2_free_alloc_context, or the
|
|
* ocfs2_delete_inode will mutex_lock again.
|
|
*/
|
|
if ((status < 0) && inode) {
|
|
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
|
|
clear_nlink(inode);
|
|
iput(inode);
|
|
}
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int __ocfs2_mknod_locked(struct inode *dir,
|
|
struct inode *inode,
|
|
dev_t dev,
|
|
struct buffer_head **new_fe_bh,
|
|
struct buffer_head *parent_fe_bh,
|
|
handle_t *handle,
|
|
struct ocfs2_alloc_context *inode_ac,
|
|
u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
|
|
{
|
|
int status = 0;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
struct ocfs2_dinode *fe = NULL;
|
|
struct ocfs2_extent_list *fel;
|
|
u16 feat;
|
|
|
|
*new_fe_bh = NULL;
|
|
|
|
/* populate as many fields early on as possible - many of
|
|
* these are used by the support functions here and in
|
|
* callers. */
|
|
inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
|
|
OCFS2_I(inode)->ip_blkno = fe_blkno;
|
|
spin_lock(&osb->osb_lock);
|
|
inode->i_generation = osb->s_next_generation++;
|
|
spin_unlock(&osb->osb_lock);
|
|
|
|
*new_fe_bh = sb_getblk(osb->sb, fe_blkno);
|
|
if (!*new_fe_bh) {
|
|
status = -EIO;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
|
|
*new_fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_CREATE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
|
|
memset(fe, 0, osb->sb->s_blocksize);
|
|
|
|
fe->i_generation = cpu_to_le32(inode->i_generation);
|
|
fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
|
|
fe->i_blkno = cpu_to_le64(fe_blkno);
|
|
fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
|
|
fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
|
|
fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
|
|
fe->i_uid = cpu_to_le32(inode->i_uid);
|
|
fe->i_gid = cpu_to_le32(inode->i_gid);
|
|
fe->i_mode = cpu_to_le16(inode->i_mode);
|
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
|
fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
|
|
|
|
ocfs2_set_links_count(fe, inode->i_nlink);
|
|
|
|
fe->i_last_eb_blk = 0;
|
|
strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
|
|
le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
|
|
fe->i_atime = fe->i_ctime = fe->i_mtime =
|
|
cpu_to_le64(CURRENT_TIME.tv_sec);
|
|
fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
|
|
cpu_to_le32(CURRENT_TIME.tv_nsec);
|
|
fe->i_dtime = 0;
|
|
|
|
/*
|
|
* If supported, directories start with inline data. If inline
|
|
* isn't supported, but indexing is, we start them as indexed.
|
|
*/
|
|
feat = le16_to_cpu(fe->i_dyn_features);
|
|
if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
|
|
fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
|
|
|
|
fe->id2.i_data.id_count = cpu_to_le16(
|
|
ocfs2_max_inline_data_with_xattr(osb->sb, fe));
|
|
} else {
|
|
fel = &fe->id2.i_list;
|
|
fel->l_tree_depth = 0;
|
|
fel->l_next_free_rec = 0;
|
|
fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
|
|
}
|
|
|
|
ocfs2_journal_dirty(handle, *new_fe_bh);
|
|
|
|
ocfs2_populate_inode(inode, fe, 1);
|
|
ocfs2_ci_set_new(osb, INODE_CACHE(inode));
|
|
if (!ocfs2_mount_local(osb)) {
|
|
status = ocfs2_create_new_inode_locks(inode);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
}
|
|
|
|
status = 0; /* error in ocfs2_create_new_inode_locks is not
|
|
* critical */
|
|
|
|
leave:
|
|
if (status < 0) {
|
|
if (*new_fe_bh) {
|
|
brelse(*new_fe_bh);
|
|
*new_fe_bh = NULL;
|
|
}
|
|
}
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_mknod_locked(struct ocfs2_super *osb,
|
|
struct inode *dir,
|
|
struct inode *inode,
|
|
dev_t dev,
|
|
struct buffer_head **new_fe_bh,
|
|
struct buffer_head *parent_fe_bh,
|
|
handle_t *handle,
|
|
struct ocfs2_alloc_context *inode_ac)
|
|
{
|
|
int status = 0;
|
|
u64 suballoc_loc, fe_blkno = 0;
|
|
u16 suballoc_bit;
|
|
|
|
*new_fe_bh = NULL;
|
|
|
|
status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
|
|
inode_ac, &suballoc_loc,
|
|
&suballoc_bit, &fe_blkno);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
|
|
parent_fe_bh, handle, inode_ac,
|
|
fe_blkno, suballoc_loc, suballoc_bit);
|
|
}
|
|
|
|
static int ocfs2_mkdir(struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode)
|
|
{
|
|
int ret;
|
|
|
|
trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
|
|
OCFS2_I(dir)->ip_blkno, mode);
|
|
ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_create(struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode,
|
|
struct nameidata *nd)
|
|
{
|
|
int ret;
|
|
|
|
trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
|
|
(unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
|
|
ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_link(struct dentry *old_dentry,
|
|
struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
handle_t *handle;
|
|
struct inode *inode = old_dentry->d_inode;
|
|
int err;
|
|
struct buffer_head *fe_bh = NULL;
|
|
struct buffer_head *parent_fe_bh = NULL;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
struct ocfs2_dir_lookup_result lookup = { NULL, };
|
|
sigset_t oldset;
|
|
|
|
trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
old_dentry->d_name.len, old_dentry->d_name.name,
|
|
dentry->d_name.len, dentry->d_name.name);
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
return -EPERM;
|
|
|
|
dquot_initialize(dir);
|
|
|
|
err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
|
|
if (err < 0) {
|
|
if (err != -ENOENT)
|
|
mlog_errno(err);
|
|
return err;
|
|
}
|
|
|
|
if (!dir->i_nlink) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
|
|
dentry->d_name.len);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
|
|
dentry->d_name.name,
|
|
dentry->d_name.len, &lookup);
|
|
if (err < 0) {
|
|
mlog_errno(err);
|
|
goto out;
|
|
}
|
|
|
|
err = ocfs2_inode_lock(inode, &fe_bh, 1);
|
|
if (err < 0) {
|
|
if (err != -ENOENT)
|
|
mlog_errno(err);
|
|
goto out;
|
|
}
|
|
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
|
|
err = -EMLINK;
|
|
goto out_unlock_inode;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
|
|
if (IS_ERR(handle)) {
|
|
err = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(err);
|
|
goto out_unlock_inode;
|
|
}
|
|
|
|
/* Starting to change things, restart is no longer possible. */
|
|
ocfs2_block_signals(&oldset);
|
|
|
|
err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (err < 0) {
|
|
mlog_errno(err);
|
|
goto out_commit;
|
|
}
|
|
|
|
inc_nlink(inode);
|
|
inode->i_ctime = CURRENT_TIME;
|
|
ocfs2_set_links_count(fe, inode->i_nlink);
|
|
fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
|
|
fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
|
|
ocfs2_journal_dirty(handle, fe_bh);
|
|
|
|
err = ocfs2_add_entry(handle, dentry, inode,
|
|
OCFS2_I(inode)->ip_blkno,
|
|
parent_fe_bh, &lookup);
|
|
if (err) {
|
|
ocfs2_add_links_count(fe, -1);
|
|
drop_nlink(inode);
|
|
mlog_errno(err);
|
|
goto out_commit;
|
|
}
|
|
|
|
err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
|
|
if (err) {
|
|
mlog_errno(err);
|
|
goto out_commit;
|
|
}
|
|
|
|
ihold(inode);
|
|
d_instantiate(dentry, inode);
|
|
|
|
out_commit:
|
|
ocfs2_commit_trans(osb, handle);
|
|
ocfs2_unblock_signals(&oldset);
|
|
out_unlock_inode:
|
|
ocfs2_inode_unlock(inode, 1);
|
|
|
|
out:
|
|
ocfs2_inode_unlock(dir, 1);
|
|
|
|
brelse(fe_bh);
|
|
brelse(parent_fe_bh);
|
|
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
|
|
if (err)
|
|
mlog_errno(err);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Takes and drops an exclusive lock on the given dentry. This will
|
|
* force other nodes to drop it.
|
|
*/
|
|
static int ocfs2_remote_dentry_delete(struct dentry *dentry)
|
|
{
|
|
int ret;
|
|
|
|
ret = ocfs2_dentry_lock(dentry, 1);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
else
|
|
ocfs2_dentry_unlock(dentry, 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int inode_is_unlinkable(struct inode *inode)
|
|
{
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (inode->i_nlink == 2)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
if (inode->i_nlink == 1)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int ocfs2_unlink(struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
int status;
|
|
int child_locked = 0;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct inode *orphan_dir = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
u64 blkno;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
struct buffer_head *fe_bh = NULL;
|
|
struct buffer_head *parent_node_bh = NULL;
|
|
handle_t *handle = NULL;
|
|
char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
|
|
struct ocfs2_dir_lookup_result lookup = { NULL, };
|
|
struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
|
|
|
|
trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
|
|
dentry->d_name.name,
|
|
(unsigned long long)OCFS2_I(dir)->ip_blkno,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
|
|
dquot_initialize(dir);
|
|
|
|
BUG_ON(dentry->d_parent->d_inode != dir);
|
|
|
|
if (inode == osb->root_inode)
|
|
return -EPERM;
|
|
|
|
status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
|
|
OI_LS_PARENT);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
status = ocfs2_find_files_on_disk(dentry->d_name.name,
|
|
dentry->d_name.len, &blkno, dir,
|
|
&lookup);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (OCFS2_I(inode)->ip_blkno != blkno) {
|
|
status = -ENOENT;
|
|
|
|
trace_ocfs2_unlink_noent(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)blkno,
|
|
OCFS2_I(inode)->ip_flags);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_inode_lock(inode, &fe_bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
child_locked = 1;
|
|
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
|
|
status = -ENOTEMPTY;
|
|
goto leave;
|
|
}
|
|
}
|
|
|
|
status = ocfs2_remote_dentry_delete(dentry);
|
|
if (status < 0) {
|
|
/* This remote delete should succeed under all normal
|
|
* circumstances. */
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (inode_is_unlinkable(inode)) {
|
|
status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
|
|
OCFS2_I(inode)->ip_blkno,
|
|
orphan_name, &orphan_insert);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
|
|
if (inode_is_unlinkable(inode)) {
|
|
status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
|
|
&orphan_insert, orphan_dir);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
}
|
|
|
|
/* delete the name from the parent dir */
|
|
status = ocfs2_delete_entry(handle, dir, &lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
drop_nlink(inode);
|
|
drop_nlink(inode);
|
|
ocfs2_set_links_count(fe, inode->i_nlink);
|
|
ocfs2_journal_dirty(handle, fe_bh);
|
|
|
|
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
|
|
if (S_ISDIR(inode->i_mode))
|
|
drop_nlink(dir);
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
if (S_ISDIR(inode->i_mode))
|
|
inc_nlink(dir);
|
|
}
|
|
|
|
leave:
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
if (child_locked)
|
|
ocfs2_inode_unlock(inode, 1);
|
|
|
|
ocfs2_inode_unlock(dir, 1);
|
|
|
|
if (orphan_dir) {
|
|
/* This was locked for us in ocfs2_prepare_orphan_dir() */
|
|
ocfs2_inode_unlock(orphan_dir, 1);
|
|
mutex_unlock(&orphan_dir->i_mutex);
|
|
iput(orphan_dir);
|
|
}
|
|
|
|
brelse(fe_bh);
|
|
brelse(parent_node_bh);
|
|
|
|
ocfs2_free_dir_lookup_result(&orphan_insert);
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* The only place this should be used is rename!
|
|
* if they have the same id, then the 1st one is the only one locked.
|
|
*/
|
|
static int ocfs2_double_lock(struct ocfs2_super *osb,
|
|
struct buffer_head **bh1,
|
|
struct inode *inode1,
|
|
struct buffer_head **bh2,
|
|
struct inode *inode2)
|
|
{
|
|
int status;
|
|
struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
|
|
struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
|
|
struct buffer_head **tmpbh;
|
|
struct inode *tmpinode;
|
|
|
|
trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
|
|
(unsigned long long)oi2->ip_blkno);
|
|
|
|
if (*bh1)
|
|
*bh1 = NULL;
|
|
if (*bh2)
|
|
*bh2 = NULL;
|
|
|
|
/* we always want to lock the one with the lower lockid first. */
|
|
if (oi1->ip_blkno != oi2->ip_blkno) {
|
|
if (oi1->ip_blkno < oi2->ip_blkno) {
|
|
/* switch id1 and id2 around */
|
|
tmpbh = bh2;
|
|
bh2 = bh1;
|
|
bh1 = tmpbh;
|
|
|
|
tmpinode = inode2;
|
|
inode2 = inode1;
|
|
inode1 = tmpinode;
|
|
}
|
|
/* lock id2 */
|
|
status = ocfs2_inode_lock_nested(inode2, bh2, 1,
|
|
OI_LS_RENAME1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/* lock id1 */
|
|
status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
|
|
if (status < 0) {
|
|
/*
|
|
* An error return must mean that no cluster locks
|
|
* were held on function exit.
|
|
*/
|
|
if (oi1->ip_blkno != oi2->ip_blkno) {
|
|
ocfs2_inode_unlock(inode2, 1);
|
|
brelse(*bh2);
|
|
*bh2 = NULL;
|
|
}
|
|
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
}
|
|
|
|
trace_ocfs2_double_lock_end(
|
|
(unsigned long long)OCFS2_I(inode1)->ip_blkno,
|
|
(unsigned long long)OCFS2_I(inode2)->ip_blkno);
|
|
|
|
bail:
|
|
if (status)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
|
|
{
|
|
ocfs2_inode_unlock(inode1, 1);
|
|
|
|
if (inode1 != inode2)
|
|
ocfs2_inode_unlock(inode2, 1);
|
|
}
|
|
|
|
static int ocfs2_rename(struct inode *old_dir,
|
|
struct dentry *old_dentry,
|
|
struct inode *new_dir,
|
|
struct dentry *new_dentry)
|
|
{
|
|
int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
|
|
int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
|
|
struct inode *old_inode = old_dentry->d_inode;
|
|
struct inode *new_inode = new_dentry->d_inode;
|
|
struct inode *orphan_dir = NULL;
|
|
struct ocfs2_dinode *newfe = NULL;
|
|
char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
|
|
struct buffer_head *newfe_bh = NULL;
|
|
struct buffer_head *old_inode_bh = NULL;
|
|
struct ocfs2_super *osb = NULL;
|
|
u64 newfe_blkno, old_de_ino;
|
|
handle_t *handle = NULL;
|
|
struct buffer_head *old_dir_bh = NULL;
|
|
struct buffer_head *new_dir_bh = NULL;
|
|
u32 old_dir_nlink = old_dir->i_nlink;
|
|
struct ocfs2_dinode *old_di;
|
|
struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
|
|
struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
|
|
struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
|
|
struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
|
|
struct ocfs2_dir_lookup_result target_insert = { NULL, };
|
|
|
|
/* At some point it might be nice to break this function up a
|
|
* bit. */
|
|
|
|
trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
|
|
old_dentry->d_name.len, old_dentry->d_name.name,
|
|
new_dentry->d_name.len, new_dentry->d_name.name);
|
|
|
|
dquot_initialize(old_dir);
|
|
dquot_initialize(new_dir);
|
|
|
|
osb = OCFS2_SB(old_dir->i_sb);
|
|
|
|
if (new_inode) {
|
|
if (!igrab(new_inode))
|
|
BUG();
|
|
}
|
|
|
|
/* Assume a directory hierarchy thusly:
|
|
* a/b/c
|
|
* a/d
|
|
* a,b,c, and d are all directories.
|
|
*
|
|
* from cwd of 'a' on both nodes:
|
|
* node1: mv b/c d
|
|
* node2: mv d b/c
|
|
*
|
|
* And that's why, just like the VFS, we need a file system
|
|
* rename lock. */
|
|
if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
|
|
status = ocfs2_rename_lock(osb);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
rename_lock = 1;
|
|
}
|
|
|
|
/* if old and new are the same, this'll just do one lock. */
|
|
status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
|
|
&new_dir_bh, new_dir);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
parents_locked = 1;
|
|
|
|
/* make sure both dirs have bhs
|
|
* get an extra ref on old_dir_bh if old==new */
|
|
if (!new_dir_bh) {
|
|
if (old_dir_bh) {
|
|
new_dir_bh = old_dir_bh;
|
|
get_bh(new_dir_bh);
|
|
} else {
|
|
mlog(ML_ERROR, "no old_dir_bh!\n");
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Aside from allowing a meta data update, the locking here
|
|
* also ensures that the downconvert thread on other nodes
|
|
* won't have to concurrently downconvert the inode and the
|
|
* dentry locks.
|
|
*/
|
|
status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
|
|
OI_LS_PARENT);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
old_child_locked = 1;
|
|
|
|
status = ocfs2_remote_dentry_delete(old_dentry);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (S_ISDIR(old_inode->i_mode)) {
|
|
u64 old_inode_parent;
|
|
|
|
update_dot_dot = 1;
|
|
status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
|
|
old_inode,
|
|
&old_inode_dot_dot_res);
|
|
if (status) {
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
|
|
if (!new_inode && new_dir != old_dir &&
|
|
new_dir->i_nlink >= ocfs2_link_max(osb)) {
|
|
status = -EMLINK;
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
|
|
old_dentry->d_name.len,
|
|
&old_de_ino);
|
|
if (status) {
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Check for inode number is _not_ due to possible IO errors.
|
|
* We might rmdir the source, keep it as pwd of some process
|
|
* and merrily kill the link to whatever was created under the
|
|
* same name. Goodbye sticky bit ;-<
|
|
*/
|
|
if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
|
|
/* check if the target already exists (in which case we need
|
|
* to delete it */
|
|
status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
|
|
new_dentry->d_name.len,
|
|
&newfe_blkno, new_dir,
|
|
&target_lookup_res);
|
|
/* The only error we allow here is -ENOENT because the new
|
|
* file not existing is perfectly valid. */
|
|
if ((status < 0) && (status != -ENOENT)) {
|
|
/* If we cannot find the file specified we should just */
|
|
/* return the error... */
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
if (status == 0)
|
|
target_exists = 1;
|
|
|
|
if (!target_exists && new_inode) {
|
|
/*
|
|
* Target was unlinked by another node while we were
|
|
* waiting to get to ocfs2_rename(). There isn't
|
|
* anything we can do here to help the situation, so
|
|
* bubble up the appropriate error.
|
|
*/
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
|
|
/* In case we need to overwrite an existing file, we blow it
|
|
* away first */
|
|
if (target_exists) {
|
|
/* VFS didn't think there existed an inode here, but
|
|
* someone else in the cluster must have raced our
|
|
* rename to create one. Today we error cleanly, in
|
|
* the future we should consider calling iget to build
|
|
* a new struct inode for this entry. */
|
|
if (!new_inode) {
|
|
status = -EACCES;
|
|
|
|
trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
|
|
new_dentry->d_name.name);
|
|
goto bail;
|
|
}
|
|
|
|
if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
|
|
status = -EACCES;
|
|
|
|
trace_ocfs2_rename_disagree(
|
|
(unsigned long long)OCFS2_I(new_inode)->ip_blkno,
|
|
(unsigned long long)newfe_blkno,
|
|
OCFS2_I(new_inode)->ip_flags);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
new_child_locked = 1;
|
|
|
|
status = ocfs2_remote_dentry_delete(new_dentry);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
|
|
|
|
trace_ocfs2_rename_over_existing(
|
|
(unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
|
|
(unsigned long long)newfe_bh->b_blocknr : 0ULL);
|
|
|
|
if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
|
|
status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
|
|
OCFS2_I(new_inode)->ip_blkno,
|
|
orphan_name, &orphan_insert);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
} else {
|
|
BUG_ON(new_dentry->d_parent->d_inode != new_dir);
|
|
|
|
status = ocfs2_check_dir_for_entry(new_dir,
|
|
new_dentry->d_name.name,
|
|
new_dentry->d_name.len);
|
|
if (status)
|
|
goto bail;
|
|
|
|
status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
|
|
new_dentry->d_name.name,
|
|
new_dentry->d_name.len,
|
|
&target_insert);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (target_exists) {
|
|
if (S_ISDIR(new_inode->i_mode)) {
|
|
if (new_inode->i_nlink != 2 ||
|
|
!ocfs2_empty_dir(new_inode)) {
|
|
status = -ENOTEMPTY;
|
|
goto bail;
|
|
}
|
|
}
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
|
|
newfe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (S_ISDIR(new_inode->i_mode) ||
|
|
(ocfs2_read_links_count(newfe) == 1)) {
|
|
status = ocfs2_orphan_add(osb, handle, new_inode,
|
|
newfe_bh, orphan_name,
|
|
&orphan_insert, orphan_dir);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/* change the dirent to point to the correct inode */
|
|
status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
|
|
old_inode);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
new_dir->i_version++;
|
|
|
|
if (S_ISDIR(new_inode->i_mode))
|
|
ocfs2_set_links_count(newfe, 0);
|
|
else
|
|
ocfs2_add_links_count(newfe, -1);
|
|
ocfs2_journal_dirty(handle, newfe_bh);
|
|
} else {
|
|
/* if the name was not found in new_dir, add it now */
|
|
status = ocfs2_add_entry(handle, new_dentry, old_inode,
|
|
OCFS2_I(old_inode)->ip_blkno,
|
|
new_dir_bh, &target_insert);
|
|
}
|
|
|
|
old_inode->i_ctime = CURRENT_TIME;
|
|
mark_inode_dirty(old_inode);
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
|
|
old_inode_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status >= 0) {
|
|
old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
|
|
|
|
old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
|
|
old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
|
|
ocfs2_journal_dirty(handle, old_inode_bh);
|
|
} else
|
|
mlog_errno(status);
|
|
|
|
/*
|
|
* Now that the name has been added to new_dir, remove the old name.
|
|
*
|
|
* We don't keep any directory entry context around until now
|
|
* because the insert might have changed the type of directory
|
|
* we're dealing with.
|
|
*/
|
|
status = ocfs2_find_entry(old_dentry->d_name.name,
|
|
old_dentry->d_name.len, old_dir,
|
|
&old_entry_lookup);
|
|
if (status)
|
|
goto bail;
|
|
|
|
status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (new_inode) {
|
|
drop_nlink(new_inode);
|
|
new_inode->i_ctime = CURRENT_TIME;
|
|
}
|
|
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
|
|
|
|
if (update_dot_dot) {
|
|
status = ocfs2_update_entry(old_inode, handle,
|
|
&old_inode_dot_dot_res, new_dir);
|
|
drop_nlink(old_dir);
|
|
if (new_inode) {
|
|
drop_nlink(new_inode);
|
|
} else {
|
|
inc_nlink(new_dir);
|
|
mark_inode_dirty(new_dir);
|
|
}
|
|
}
|
|
mark_inode_dirty(old_dir);
|
|
ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
|
|
if (new_inode) {
|
|
mark_inode_dirty(new_inode);
|
|
ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
|
|
}
|
|
|
|
if (old_dir != new_dir) {
|
|
/* Keep the same times on both directories.*/
|
|
new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
|
|
|
|
/*
|
|
* This will also pick up the i_nlink change from the
|
|
* block above.
|
|
*/
|
|
ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
|
|
}
|
|
|
|
if (old_dir_nlink != old_dir->i_nlink) {
|
|
if (!old_dir_bh) {
|
|
mlog(ML_ERROR, "need to change nlink for old dir "
|
|
"%llu from %d to %d but bh is NULL!\n",
|
|
(unsigned long long)OCFS2_I(old_dir)->ip_blkno,
|
|
(int)old_dir_nlink, old_dir->i_nlink);
|
|
} else {
|
|
struct ocfs2_dinode *fe;
|
|
status = ocfs2_journal_access_di(handle,
|
|
INODE_CACHE(old_dir),
|
|
old_dir_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
|
|
ocfs2_set_links_count(fe, old_dir->i_nlink);
|
|
ocfs2_journal_dirty(handle, old_dir_bh);
|
|
}
|
|
}
|
|
ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
|
|
status = 0;
|
|
bail:
|
|
if (rename_lock)
|
|
ocfs2_rename_unlock(osb);
|
|
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
if (parents_locked)
|
|
ocfs2_double_unlock(old_dir, new_dir);
|
|
|
|
if (old_child_locked)
|
|
ocfs2_inode_unlock(old_inode, 1);
|
|
|
|
if (new_child_locked)
|
|
ocfs2_inode_unlock(new_inode, 1);
|
|
|
|
if (orphan_dir) {
|
|
/* This was locked for us in ocfs2_prepare_orphan_dir() */
|
|
ocfs2_inode_unlock(orphan_dir, 1);
|
|
mutex_unlock(&orphan_dir->i_mutex);
|
|
iput(orphan_dir);
|
|
}
|
|
|
|
if (new_inode)
|
|
sync_mapping_buffers(old_inode->i_mapping);
|
|
|
|
if (new_inode)
|
|
iput(new_inode);
|
|
|
|
ocfs2_free_dir_lookup_result(&target_lookup_res);
|
|
ocfs2_free_dir_lookup_result(&old_entry_lookup);
|
|
ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
|
|
ocfs2_free_dir_lookup_result(&orphan_insert);
|
|
ocfs2_free_dir_lookup_result(&target_insert);
|
|
|
|
brelse(newfe_bh);
|
|
brelse(old_inode_bh);
|
|
brelse(old_dir_bh);
|
|
brelse(new_dir_bh);
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* we expect i_size = strlen(symname). Copy symname into the file
|
|
* data, including the null terminator.
|
|
*/
|
|
static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *inode,
|
|
const char *symname)
|
|
{
|
|
struct buffer_head **bhs = NULL;
|
|
const char *c;
|
|
struct super_block *sb = osb->sb;
|
|
u64 p_blkno, p_blocks;
|
|
int virtual, blocks, status, i, bytes_left;
|
|
|
|
bytes_left = i_size_read(inode) + 1;
|
|
/* we can't trust i_blocks because we're actually going to
|
|
* write i_size + 1 bytes. */
|
|
blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
|
|
|
|
trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
|
|
i_size_read(inode), blocks);
|
|
|
|
/* Sanity check -- make sure we're going to fit. */
|
|
if (bytes_left >
|
|
ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
|
|
status = -EIO;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
|
|
if (!bhs) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
|
|
NULL);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* links can never be larger than one cluster so we know this
|
|
* is all going to be contiguous, but do a sanity check
|
|
* anyway. */
|
|
if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
|
|
status = -EIO;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
virtual = 0;
|
|
while(bytes_left > 0) {
|
|
c = &symname[virtual * sb->s_blocksize];
|
|
|
|
bhs[virtual] = sb_getblk(sb, p_blkno);
|
|
if (!bhs[virtual]) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
|
|
bhs[virtual]);
|
|
|
|
status = ocfs2_journal_access(handle, INODE_CACHE(inode),
|
|
bhs[virtual],
|
|
OCFS2_JOURNAL_ACCESS_CREATE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
|
|
|
|
memcpy(bhs[virtual]->b_data, c,
|
|
(bytes_left > sb->s_blocksize) ? sb->s_blocksize :
|
|
bytes_left);
|
|
|
|
ocfs2_journal_dirty(handle, bhs[virtual]);
|
|
|
|
virtual++;
|
|
p_blkno++;
|
|
bytes_left -= sb->s_blocksize;
|
|
}
|
|
|
|
status = 0;
|
|
bail:
|
|
|
|
if (bhs) {
|
|
for(i = 0; i < blocks; i++)
|
|
brelse(bhs[i]);
|
|
kfree(bhs);
|
|
}
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_symlink(struct inode *dir,
|
|
struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
int status, l, credits;
|
|
u64 newsize;
|
|
struct ocfs2_super *osb = NULL;
|
|
struct inode *inode = NULL;
|
|
struct super_block *sb;
|
|
struct buffer_head *new_fe_bh = NULL;
|
|
struct buffer_head *parent_fe_bh = NULL;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
struct ocfs2_dinode *dirfe;
|
|
handle_t *handle = NULL;
|
|
struct ocfs2_alloc_context *inode_ac = NULL;
|
|
struct ocfs2_alloc_context *data_ac = NULL;
|
|
struct ocfs2_alloc_context *xattr_ac = NULL;
|
|
int want_clusters = 0;
|
|
int xattr_credits = 0;
|
|
struct ocfs2_security_xattr_info si = {
|
|
.enable = 1,
|
|
};
|
|
int did_quota = 0, did_quota_inode = 0;
|
|
struct ocfs2_dir_lookup_result lookup = { NULL, };
|
|
sigset_t oldset;
|
|
int did_block_signals = 0;
|
|
|
|
trace_ocfs2_symlink_begin(dir, dentry, symname,
|
|
dentry->d_name.len, dentry->d_name.name);
|
|
|
|
dquot_initialize(dir);
|
|
|
|
sb = dir->i_sb;
|
|
osb = OCFS2_SB(sb);
|
|
|
|
l = strlen(symname) + 1;
|
|
|
|
credits = ocfs2_calc_symlink_credits(sb);
|
|
|
|
/* lock the parent directory */
|
|
status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
|
|
if (!ocfs2_read_links_count(dirfe)) {
|
|
/* can't make a file in a deleted directory. */
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
|
|
dentry->d_name.len);
|
|
if (status)
|
|
goto bail;
|
|
|
|
status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
|
|
dentry->d_name.name,
|
|
dentry->d_name.len, &lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_reserve_new_inode(osb, &inode_ac);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
|
|
if (!inode) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* get security xattr */
|
|
status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
|
|
if (status) {
|
|
if (status == -EOPNOTSUPP)
|
|
si.enable = 0;
|
|
else {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/* calculate meta data/clusters for setting security xattr */
|
|
if (si.enable) {
|
|
status = ocfs2_calc_security_init(dir, &si, &want_clusters,
|
|
&xattr_credits, &xattr_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/* don't reserve bitmap space for fast symlinks. */
|
|
if (l > ocfs2_fast_symlink_chars(sb))
|
|
want_clusters += 1;
|
|
|
|
status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, credits + xattr_credits);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
/* Starting to change things, restart is no longer possible. */
|
|
ocfs2_block_signals(&oldset);
|
|
did_block_signals = 1;
|
|
|
|
status = dquot_alloc_inode(inode);
|
|
if (status)
|
|
goto bail;
|
|
did_quota_inode = 1;
|
|
|
|
trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
|
|
dentry->d_name.name,
|
|
(unsigned long long)OCFS2_I(dir)->ip_blkno,
|
|
inode->i_mode);
|
|
|
|
status = ocfs2_mknod_locked(osb, dir, inode,
|
|
0, &new_fe_bh, parent_fe_bh, handle,
|
|
inode_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
|
|
inode->i_rdev = 0;
|
|
newsize = l - 1;
|
|
inode->i_op = &ocfs2_symlink_inode_operations;
|
|
if (l > ocfs2_fast_symlink_chars(sb)) {
|
|
u32 offset = 0;
|
|
|
|
status = dquot_alloc_space_nodirty(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, 1));
|
|
if (status)
|
|
goto bail;
|
|
did_quota = 1;
|
|
inode->i_mapping->a_ops = &ocfs2_aops;
|
|
status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
|
|
new_fe_bh,
|
|
handle, data_ac, NULL,
|
|
NULL);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC && status != -EINTR) {
|
|
mlog(ML_ERROR,
|
|
"Failed to extend file to %llu\n",
|
|
(unsigned long long)newsize);
|
|
mlog_errno(status);
|
|
status = -ENOSPC;
|
|
}
|
|
goto bail;
|
|
}
|
|
i_size_write(inode, newsize);
|
|
inode->i_blocks = ocfs2_inode_sector_count(inode);
|
|
} else {
|
|
inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
|
|
memcpy((char *) fe->id2.i_symlink, symname, l);
|
|
i_size_write(inode, newsize);
|
|
inode->i_blocks = 0;
|
|
}
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
if (!ocfs2_inode_is_fast_symlink(inode)) {
|
|
status = ocfs2_create_symlink_data(osb, handle, inode,
|
|
symname);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
if (si.enable) {
|
|
status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
|
|
xattr_ac, data_ac);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do this before adding the entry to the directory. We add
|
|
* also set d_op after success so that ->d_iput() will cleanup
|
|
* the dentry lock even if ocfs2_add_entry() fails below.
|
|
*/
|
|
status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_add_entry(handle, dentry, inode,
|
|
le64_to_cpu(fe->i_blkno), parent_fe_bh,
|
|
&lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
insert_inode_hash(inode);
|
|
d_instantiate(dentry, inode);
|
|
bail:
|
|
if (status < 0 && did_quota)
|
|
dquot_free_space_nodirty(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, 1));
|
|
if (status < 0 && did_quota_inode)
|
|
dquot_free_inode(inode);
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
ocfs2_inode_unlock(dir, 1);
|
|
if (did_block_signals)
|
|
ocfs2_unblock_signals(&oldset);
|
|
|
|
brelse(new_fe_bh);
|
|
brelse(parent_fe_bh);
|
|
kfree(si.name);
|
|
kfree(si.value);
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
if (inode_ac)
|
|
ocfs2_free_alloc_context(inode_ac);
|
|
if (data_ac)
|
|
ocfs2_free_alloc_context(data_ac);
|
|
if (xattr_ac)
|
|
ocfs2_free_alloc_context(xattr_ac);
|
|
if ((status < 0) && inode) {
|
|
OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
|
|
clear_nlink(inode);
|
|
iput(inode);
|
|
}
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_blkno_stringify(u64 blkno, char *name)
|
|
{
|
|
int status, namelen;
|
|
|
|
namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
|
|
(long long)blkno);
|
|
if (namelen <= 0) {
|
|
if (namelen)
|
|
status = namelen;
|
|
else
|
|
status = -EINVAL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
if (namelen != OCFS2_ORPHAN_NAMELEN) {
|
|
status = -EINVAL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
trace_ocfs2_blkno_stringify(blkno, name, namelen);
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
|
|
struct inode **ret_orphan_dir,
|
|
struct buffer_head **ret_orphan_dir_bh)
|
|
{
|
|
struct inode *orphan_dir_inode;
|
|
struct buffer_head *orphan_dir_bh = NULL;
|
|
int ret = 0;
|
|
|
|
orphan_dir_inode = ocfs2_get_system_file_inode(osb,
|
|
ORPHAN_DIR_SYSTEM_INODE,
|
|
osb->slot_num);
|
|
if (!orphan_dir_inode) {
|
|
ret = -ENOENT;
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
mutex_lock(&orphan_dir_inode->i_mutex);
|
|
|
|
ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
|
|
if (ret < 0) {
|
|
mutex_unlock(&orphan_dir_inode->i_mutex);
|
|
iput(orphan_dir_inode);
|
|
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
*ret_orphan_dir = orphan_dir_inode;
|
|
*ret_orphan_dir_bh = orphan_dir_bh;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
|
|
struct buffer_head *orphan_dir_bh,
|
|
u64 blkno,
|
|
char *name,
|
|
struct ocfs2_dir_lookup_result *lookup)
|
|
{
|
|
int ret;
|
|
struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
|
|
|
|
ret = ocfs2_blkno_stringify(blkno, name);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
|
|
orphan_dir_bh, name,
|
|
OCFS2_ORPHAN_NAMELEN, lookup);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
|
|
* insertion of an orphan.
|
|
* @osb: ocfs2 file system
|
|
* @ret_orphan_dir: Orphan dir inode - returned locked!
|
|
* @blkno: Actual block number of the inode to be inserted into orphan dir.
|
|
* @lookup: dir lookup result, to be passed back into functions like
|
|
* ocfs2_orphan_add
|
|
*
|
|
* Returns zero on success and the ret_orphan_dir, name and lookup
|
|
* fields will be populated.
|
|
*
|
|
* Returns non-zero on failure.
|
|
*/
|
|
static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
|
|
struct inode **ret_orphan_dir,
|
|
u64 blkno,
|
|
char *name,
|
|
struct ocfs2_dir_lookup_result *lookup)
|
|
{
|
|
struct inode *orphan_dir_inode = NULL;
|
|
struct buffer_head *orphan_dir_bh = NULL;
|
|
int ret = 0;
|
|
|
|
ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
|
|
&orphan_dir_bh);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
|
|
blkno, name, lookup);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
*ret_orphan_dir = orphan_dir_inode;
|
|
|
|
out:
|
|
brelse(orphan_dir_bh);
|
|
|
|
if (ret) {
|
|
ocfs2_inode_unlock(orphan_dir_inode, 1);
|
|
mutex_unlock(&orphan_dir_inode->i_mutex);
|
|
iput(orphan_dir_inode);
|
|
}
|
|
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_orphan_add(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *inode,
|
|
struct buffer_head *fe_bh,
|
|
char *name,
|
|
struct ocfs2_dir_lookup_result *lookup,
|
|
struct inode *orphan_dir_inode)
|
|
{
|
|
struct buffer_head *orphan_dir_bh = NULL;
|
|
int status = 0;
|
|
struct ocfs2_dinode *orphan_fe;
|
|
struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
|
|
|
|
trace_ocfs2_orphan_add_begin(
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
|
|
status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle,
|
|
INODE_CACHE(orphan_dir_inode),
|
|
orphan_dir_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/* we're a cluster, and nlink can change on disk from
|
|
* underneath us... */
|
|
orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
|
|
if (S_ISDIR(inode->i_mode))
|
|
ocfs2_add_links_count(orphan_fe, 1);
|
|
set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
|
|
ocfs2_journal_dirty(handle, orphan_dir_bh);
|
|
|
|
status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
|
|
OCFS2_ORPHAN_NAMELEN, inode,
|
|
OCFS2_I(inode)->ip_blkno,
|
|
orphan_dir_bh, lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/*
|
|
* We're going to journal the change of i_flags and i_orphaned_slot.
|
|
* It's safe anyway, though some callers may duplicate the journaling.
|
|
* Journaling within the func just make the logic look more
|
|
* straightforward.
|
|
*/
|
|
status = ocfs2_journal_access_di(handle,
|
|
INODE_CACHE(inode),
|
|
fe_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
|
|
OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
|
|
|
|
/* Record which orphan dir our inode now resides
|
|
* in. delete_inode will use this to determine which orphan
|
|
* dir to lock. */
|
|
fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
|
|
|
|
ocfs2_journal_dirty(handle, fe_bh);
|
|
|
|
trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
osb->slot_num);
|
|
|
|
leave:
|
|
brelse(orphan_dir_bh);
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
/* unlike orphan_add, we expect the orphan dir to already be locked here. */
|
|
int ocfs2_orphan_del(struct ocfs2_super *osb,
|
|
handle_t *handle,
|
|
struct inode *orphan_dir_inode,
|
|
struct inode *inode,
|
|
struct buffer_head *orphan_dir_bh)
|
|
{
|
|
char name[OCFS2_ORPHAN_NAMELEN + 1];
|
|
struct ocfs2_dinode *orphan_fe;
|
|
int status = 0;
|
|
struct ocfs2_dir_lookup_result lookup = { NULL, };
|
|
|
|
status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
trace_ocfs2_orphan_del(
|
|
(unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
|
|
name, OCFS2_ORPHAN_NAMELEN);
|
|
|
|
/* find it's spot in the orphan directory */
|
|
status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
|
|
&lookup);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/* remove it from the orphan directory */
|
|
status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle,
|
|
INODE_CACHE(orphan_dir_inode),
|
|
orphan_dir_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/* do the i_nlink dance! :) */
|
|
orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
|
|
if (S_ISDIR(inode->i_mode))
|
|
ocfs2_add_links_count(orphan_fe, -1);
|
|
set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
|
|
ocfs2_journal_dirty(handle, orphan_dir_bh);
|
|
|
|
leave:
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
|
|
* allocated file. This is different from the typical 'add to orphan dir'
|
|
* operation in that the inode does not yet exist. This is a problem because
|
|
* the orphan dir stringifies the inode block number to come up with it's
|
|
* dirent. Obviously if the inode does not yet exist we have a chicken and egg
|
|
* problem. This function works around it by calling deeper into the orphan
|
|
* and suballoc code than other callers. Use this only by necessity.
|
|
* @dir: The directory which this inode will ultimately wind up under - not the
|
|
* orphan dir!
|
|
* @dir_bh: buffer_head the @dir inode block
|
|
* @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
|
|
* with the string to be used for orphan dirent. Pass back to the orphan dir
|
|
* code.
|
|
* @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
|
|
* dir code.
|
|
* @ret_di_blkno: block number where the new inode will be allocated.
|
|
* @orphan_insert: Dir insert context to be passed back into orphan dir code.
|
|
* @ret_inode_ac: Inode alloc context to be passed back to the allocator.
|
|
*
|
|
* Returns zero on success and the ret_orphan_dir, name and lookup
|
|
* fields will be populated.
|
|
*
|
|
* Returns non-zero on failure.
|
|
*/
|
|
static int ocfs2_prep_new_orphaned_file(struct inode *dir,
|
|
struct buffer_head *dir_bh,
|
|
char *orphan_name,
|
|
struct inode **ret_orphan_dir,
|
|
u64 *ret_di_blkno,
|
|
struct ocfs2_dir_lookup_result *orphan_insert,
|
|
struct ocfs2_alloc_context **ret_inode_ac)
|
|
{
|
|
int ret;
|
|
u64 di_blkno;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
struct inode *orphan_dir = NULL;
|
|
struct buffer_head *orphan_dir_bh = NULL;
|
|
struct ocfs2_alloc_context *inode_ac = NULL;
|
|
|
|
ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
|
|
/* reserve an inode spot */
|
|
ret = ocfs2_reserve_new_inode(osb, &inode_ac);
|
|
if (ret < 0) {
|
|
if (ret != -ENOSPC)
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
|
|
&di_blkno);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
|
|
di_blkno, orphan_name, orphan_insert);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
if (ret == 0) {
|
|
*ret_orphan_dir = orphan_dir;
|
|
*ret_di_blkno = di_blkno;
|
|
*ret_inode_ac = inode_ac;
|
|
/*
|
|
* orphan_name and orphan_insert are already up to
|
|
* date via prepare_orphan_dir
|
|
*/
|
|
} else {
|
|
/* Unroll reserve_new_inode* */
|
|
if (inode_ac)
|
|
ocfs2_free_alloc_context(inode_ac);
|
|
|
|
/* Unroll orphan dir locking */
|
|
mutex_unlock(&orphan_dir->i_mutex);
|
|
ocfs2_inode_unlock(orphan_dir, 1);
|
|
iput(orphan_dir);
|
|
}
|
|
|
|
brelse(orphan_dir_bh);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ocfs2_create_inode_in_orphan(struct inode *dir,
|
|
int mode,
|
|
struct inode **new_inode)
|
|
{
|
|
int status, did_quota_inode = 0;
|
|
struct inode *inode = NULL;
|
|
struct inode *orphan_dir = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
struct ocfs2_dinode *di = NULL;
|
|
handle_t *handle = NULL;
|
|
char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
|
|
struct buffer_head *parent_di_bh = NULL;
|
|
struct buffer_head *new_di_bh = NULL;
|
|
struct ocfs2_alloc_context *inode_ac = NULL;
|
|
struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
|
|
u64 uninitialized_var(di_blkno), suballoc_loc;
|
|
u16 suballoc_bit;
|
|
|
|
status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
|
|
orphan_name, &orphan_dir,
|
|
&di_blkno, &orphan_insert, &inode_ac);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
inode = ocfs2_get_init_inode(dir, mode);
|
|
if (!inode) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = dquot_alloc_inode(inode);
|
|
if (status)
|
|
goto leave;
|
|
did_quota_inode = 1;
|
|
|
|
status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
|
|
&suballoc_loc,
|
|
&suballoc_bit, di_blkno);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
clear_nlink(inode);
|
|
/* do the real work now. */
|
|
status = __ocfs2_mknod_locked(dir, inode,
|
|
0, &new_di_bh, parent_di_bh, handle,
|
|
inode_ac, di_blkno, suballoc_loc,
|
|
suballoc_bit);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
di = (struct ocfs2_dinode *)new_di_bh->b_data;
|
|
status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
|
|
&orphan_insert, orphan_dir);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
/* get open lock so that only nodes can't remove it from orphan dir. */
|
|
status = ocfs2_open_lock(inode);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
insert_inode_hash(inode);
|
|
leave:
|
|
if (status < 0 && did_quota_inode)
|
|
dquot_free_inode(inode);
|
|
if (handle)
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
if (orphan_dir) {
|
|
/* This was locked for us in ocfs2_prepare_orphan_dir() */
|
|
ocfs2_inode_unlock(orphan_dir, 1);
|
|
mutex_unlock(&orphan_dir->i_mutex);
|
|
iput(orphan_dir);
|
|
}
|
|
|
|
if ((status < 0) && inode) {
|
|
clear_nlink(inode);
|
|
iput(inode);
|
|
}
|
|
|
|
if (inode_ac)
|
|
ocfs2_free_alloc_context(inode_ac);
|
|
|
|
brelse(new_di_bh);
|
|
|
|
if (!status)
|
|
*new_inode = inode;
|
|
|
|
ocfs2_free_dir_lookup_result(&orphan_insert);
|
|
|
|
ocfs2_inode_unlock(dir, 1);
|
|
brelse(parent_di_bh);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
|
|
struct inode *inode,
|
|
struct dentry *dentry)
|
|
{
|
|
int status = 0;
|
|
struct buffer_head *parent_di_bh = NULL;
|
|
handle_t *handle = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
|
|
struct ocfs2_dinode *dir_di, *di;
|
|
struct inode *orphan_dir_inode = NULL;
|
|
struct buffer_head *orphan_dir_bh = NULL;
|
|
struct buffer_head *di_bh = NULL;
|
|
struct ocfs2_dir_lookup_result lookup = { NULL, };
|
|
|
|
trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
|
|
dentry->d_name.len, dentry->d_name.name,
|
|
(unsigned long long)OCFS2_I(dir)->ip_blkno,
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno);
|
|
|
|
status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
|
|
dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
|
|
if (!dir_di->i_links_count) {
|
|
/* can't make a file in a deleted directory. */
|
|
status = -ENOENT;
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
|
|
dentry->d_name.len);
|
|
if (status)
|
|
goto leave;
|
|
|
|
/* get a spot inside the dir. */
|
|
status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
|
|
dentry->d_name.name,
|
|
dentry->d_name.len, &lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
orphan_dir_inode = ocfs2_get_system_file_inode(osb,
|
|
ORPHAN_DIR_SYSTEM_INODE,
|
|
osb->slot_num);
|
|
if (!orphan_dir_inode) {
|
|
status = -EEXIST;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
mutex_lock(&orphan_dir_inode->i_mutex);
|
|
|
|
status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
mutex_unlock(&orphan_dir_inode->i_mutex);
|
|
iput(orphan_dir_inode);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_read_inode_block(inode, &di_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto orphan_unlock;
|
|
}
|
|
|
|
handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto orphan_unlock;
|
|
}
|
|
|
|
status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
|
|
di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
|
|
orphan_dir_bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
|
|
di->i_orphaned_slot = 0;
|
|
set_nlink(inode, 1);
|
|
ocfs2_set_links_count(di, inode->i_nlink);
|
|
ocfs2_journal_dirty(handle, di_bh);
|
|
|
|
status = ocfs2_add_entry(handle, dentry, inode,
|
|
OCFS2_I(inode)->ip_blkno, parent_di_bh,
|
|
&lookup);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
status = ocfs2_dentry_attach_lock(dentry, inode,
|
|
OCFS2_I(dir)->ip_blkno);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto out_commit;
|
|
}
|
|
|
|
d_instantiate(dentry, inode);
|
|
status = 0;
|
|
out_commit:
|
|
ocfs2_commit_trans(osb, handle);
|
|
orphan_unlock:
|
|
ocfs2_inode_unlock(orphan_dir_inode, 1);
|
|
mutex_unlock(&orphan_dir_inode->i_mutex);
|
|
iput(orphan_dir_inode);
|
|
leave:
|
|
|
|
ocfs2_inode_unlock(dir, 1);
|
|
|
|
brelse(di_bh);
|
|
brelse(parent_di_bh);
|
|
brelse(orphan_dir_bh);
|
|
|
|
ocfs2_free_dir_lookup_result(&lookup);
|
|
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
return status;
|
|
}
|
|
|
|
const struct inode_operations ocfs2_dir_iops = {
|
|
.create = ocfs2_create,
|
|
.lookup = ocfs2_lookup,
|
|
.link = ocfs2_link,
|
|
.unlink = ocfs2_unlink,
|
|
.rmdir = ocfs2_unlink,
|
|
.symlink = ocfs2_symlink,
|
|
.mkdir = ocfs2_mkdir,
|
|
.mknod = ocfs2_mknod,
|
|
.rename = ocfs2_rename,
|
|
.setattr = ocfs2_setattr,
|
|
.getattr = ocfs2_getattr,
|
|
.permission = ocfs2_permission,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = ocfs2_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
.fiemap = ocfs2_fiemap,
|
|
.get_acl = ocfs2_iop_get_acl,
|
|
};
|