![Eric Biggers](/assets/img/avatar_default.png)
nfs_idmap_legacy_upcall() is supposed to be called with 'aux' pointing
to a 'struct idmap', via the call to request_key_with_auxdata() in
nfs_idmap_request_key().
However it can also be reached via the request_key() system call in
which case 'aux' will be NULL, causing a NULL pointer dereference in
nfs_idmap_prepare_pipe_upcall(), assuming that the key description is
valid enough to get that far.
Fix this by making nfs_idmap_legacy_upcall() negate the key if no
auxdata is provided.
As usual, this bug was found by syzkaller. A simple reproducer using
the command-line keyctl program is:
keyctl request2 id_legacy uid:0 '' @s
Fixes: 57e62324e4
("NFS: Store the legacy idmapper result in the keyring")
Reported-by: syzbot+5dfdbcf7b3eb5912abbb@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Trond Myklebust <trondmy@gmail.com>
783 lines
19 KiB
C
783 lines
19 KiB
C
/*
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* fs/nfs/idmap.c
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*
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* UID and GID to name mapping for clients.
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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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* Marius Aamodt Eriksen <marius@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/types.h>
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#include <linux/parser.h>
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#include <linux/fs.h>
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#include <net/net_namespace.h>
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#include <linux/sunrpc/rpc_pipe_fs.h>
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#include <linux/nfs_fs.h>
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#include <linux/nfs_fs_sb.h>
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#include <linux/key.h>
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#include <linux/keyctl.h>
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#include <linux/key-type.h>
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#include <keys/user-type.h>
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#include <linux/module.h>
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#include "internal.h"
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#include "netns.h"
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#include "nfs4idmap.h"
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#include "nfs4trace.h"
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#define NFS_UINT_MAXLEN 11
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static const struct cred *id_resolver_cache;
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static struct key_type key_type_id_resolver_legacy;
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struct idmap_legacy_upcalldata {
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struct rpc_pipe_msg pipe_msg;
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struct idmap_msg idmap_msg;
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struct key_construction *key_cons;
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struct idmap *idmap;
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};
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struct idmap {
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struct rpc_pipe_dir_object idmap_pdo;
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struct rpc_pipe *idmap_pipe;
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struct idmap_legacy_upcalldata *idmap_upcall_data;
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struct mutex idmap_mutex;
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};
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/**
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* nfs_fattr_init_names - initialise the nfs_fattr owner_name/group_name fields
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* @fattr: fully initialised struct nfs_fattr
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* @owner_name: owner name string cache
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* @group_name: group name string cache
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*/
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void nfs_fattr_init_names(struct nfs_fattr *fattr,
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struct nfs4_string *owner_name,
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struct nfs4_string *group_name)
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{
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fattr->owner_name = owner_name;
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fattr->group_name = group_name;
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}
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static void nfs_fattr_free_owner_name(struct nfs_fattr *fattr)
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{
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fattr->valid &= ~NFS_ATTR_FATTR_OWNER_NAME;
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kfree(fattr->owner_name->data);
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}
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static void nfs_fattr_free_group_name(struct nfs_fattr *fattr)
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{
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fattr->valid &= ~NFS_ATTR_FATTR_GROUP_NAME;
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kfree(fattr->group_name->data);
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}
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static bool nfs_fattr_map_owner_name(struct nfs_server *server, struct nfs_fattr *fattr)
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{
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struct nfs4_string *owner = fattr->owner_name;
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kuid_t uid;
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if (!(fattr->valid & NFS_ATTR_FATTR_OWNER_NAME))
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return false;
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if (nfs_map_name_to_uid(server, owner->data, owner->len, &uid) == 0) {
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fattr->uid = uid;
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fattr->valid |= NFS_ATTR_FATTR_OWNER;
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}
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return true;
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}
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static bool nfs_fattr_map_group_name(struct nfs_server *server, struct nfs_fattr *fattr)
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{
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struct nfs4_string *group = fattr->group_name;
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kgid_t gid;
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if (!(fattr->valid & NFS_ATTR_FATTR_GROUP_NAME))
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return false;
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if (nfs_map_group_to_gid(server, group->data, group->len, &gid) == 0) {
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fattr->gid = gid;
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fattr->valid |= NFS_ATTR_FATTR_GROUP;
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}
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return true;
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}
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/**
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* nfs_fattr_free_names - free up the NFSv4 owner and group strings
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* @fattr: a fully initialised nfs_fattr structure
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*/
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void nfs_fattr_free_names(struct nfs_fattr *fattr)
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{
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if (fattr->valid & NFS_ATTR_FATTR_OWNER_NAME)
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nfs_fattr_free_owner_name(fattr);
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if (fattr->valid & NFS_ATTR_FATTR_GROUP_NAME)
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nfs_fattr_free_group_name(fattr);
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}
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/**
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* nfs_fattr_map_and_free_names - map owner/group strings into uid/gid and free
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* @server: pointer to the filesystem nfs_server structure
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* @fattr: a fully initialised nfs_fattr structure
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*
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* This helper maps the cached NFSv4 owner/group strings in fattr into
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* their numeric uid/gid equivalents, and then frees the cached strings.
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*/
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void nfs_fattr_map_and_free_names(struct nfs_server *server, struct nfs_fattr *fattr)
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{
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if (nfs_fattr_map_owner_name(server, fattr))
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nfs_fattr_free_owner_name(fattr);
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if (nfs_fattr_map_group_name(server, fattr))
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nfs_fattr_free_group_name(fattr);
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}
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int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res)
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{
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unsigned long val;
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char buf[16];
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if (memchr(name, '@', namelen) != NULL || namelen >= sizeof(buf))
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return 0;
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memcpy(buf, name, namelen);
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buf[namelen] = '\0';
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if (kstrtoul(buf, 0, &val) != 0)
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return 0;
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*res = val;
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return 1;
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}
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EXPORT_SYMBOL_GPL(nfs_map_string_to_numeric);
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static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen)
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{
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return snprintf(buf, buflen, "%u", id);
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}
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static struct key_type key_type_id_resolver = {
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.name = "id_resolver",
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.preparse = user_preparse,
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.free_preparse = user_free_preparse,
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.instantiate = generic_key_instantiate,
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.revoke = user_revoke,
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.destroy = user_destroy,
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.describe = user_describe,
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.read = user_read,
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};
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int nfs_idmap_init(void)
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{
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struct cred *cred;
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struct key *keyring;
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int ret = 0;
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printk(KERN_NOTICE "NFS: Registering the %s key type\n",
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key_type_id_resolver.name);
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cred = prepare_kernel_cred(NULL);
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if (!cred)
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return -ENOMEM;
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keyring = keyring_alloc(".id_resolver",
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GLOBAL_ROOT_UID, GLOBAL_ROOT_GID, cred,
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(KEY_POS_ALL & ~KEY_POS_SETATTR) |
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KEY_USR_VIEW | KEY_USR_READ,
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KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
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if (IS_ERR(keyring)) {
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ret = PTR_ERR(keyring);
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goto failed_put_cred;
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}
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ret = register_key_type(&key_type_id_resolver);
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if (ret < 0)
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goto failed_put_key;
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ret = register_key_type(&key_type_id_resolver_legacy);
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if (ret < 0)
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goto failed_reg_legacy;
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set_bit(KEY_FLAG_ROOT_CAN_CLEAR, &keyring->flags);
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cred->thread_keyring = keyring;
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cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
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id_resolver_cache = cred;
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return 0;
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failed_reg_legacy:
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unregister_key_type(&key_type_id_resolver);
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failed_put_key:
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key_put(keyring);
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failed_put_cred:
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put_cred(cred);
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return ret;
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}
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void nfs_idmap_quit(void)
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{
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key_revoke(id_resolver_cache->thread_keyring);
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unregister_key_type(&key_type_id_resolver);
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unregister_key_type(&key_type_id_resolver_legacy);
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put_cred(id_resolver_cache);
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}
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/*
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* Assemble the description to pass to request_key()
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* This function will allocate a new string and update dest to point
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* at it. The caller is responsible for freeing dest.
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*
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* On error 0 is returned. Otherwise, the length of dest is returned.
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*/
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static ssize_t nfs_idmap_get_desc(const char *name, size_t namelen,
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const char *type, size_t typelen, char **desc)
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{
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char *cp;
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size_t desclen = typelen + namelen + 2;
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*desc = kmalloc(desclen, GFP_KERNEL);
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if (!*desc)
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return -ENOMEM;
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cp = *desc;
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memcpy(cp, type, typelen);
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cp += typelen;
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*cp++ = ':';
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memcpy(cp, name, namelen);
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cp += namelen;
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*cp = '\0';
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return desclen;
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}
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static struct key *nfs_idmap_request_key(const char *name, size_t namelen,
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const char *type, struct idmap *idmap)
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{
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char *desc;
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struct key *rkey;
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ssize_t ret;
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ret = nfs_idmap_get_desc(name, namelen, type, strlen(type), &desc);
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if (ret < 0)
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return ERR_PTR(ret);
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rkey = request_key(&key_type_id_resolver, desc, "");
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if (IS_ERR(rkey)) {
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mutex_lock(&idmap->idmap_mutex);
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rkey = request_key_with_auxdata(&key_type_id_resolver_legacy,
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desc, "", 0, idmap);
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mutex_unlock(&idmap->idmap_mutex);
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}
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if (!IS_ERR(rkey))
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set_bit(KEY_FLAG_ROOT_CAN_INVAL, &rkey->flags);
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kfree(desc);
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return rkey;
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}
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static ssize_t nfs_idmap_get_key(const char *name, size_t namelen,
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const char *type, void *data,
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size_t data_size, struct idmap *idmap)
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{
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const struct cred *saved_cred;
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struct key *rkey;
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const struct user_key_payload *payload;
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ssize_t ret;
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saved_cred = override_creds(id_resolver_cache);
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rkey = nfs_idmap_request_key(name, namelen, type, idmap);
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revert_creds(saved_cred);
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if (IS_ERR(rkey)) {
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ret = PTR_ERR(rkey);
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goto out;
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}
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rcu_read_lock();
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rkey->perm |= KEY_USR_VIEW;
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ret = key_validate(rkey);
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if (ret < 0)
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goto out_up;
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payload = user_key_payload_rcu(rkey);
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if (IS_ERR_OR_NULL(payload)) {
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ret = PTR_ERR(payload);
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goto out_up;
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}
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ret = payload->datalen;
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if (ret > 0 && ret <= data_size)
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memcpy(data, payload->data, ret);
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else
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ret = -EINVAL;
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out_up:
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rcu_read_unlock();
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key_put(rkey);
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out:
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return ret;
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}
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/* ID -> Name */
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static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf,
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size_t buflen, struct idmap *idmap)
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{
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char id_str[NFS_UINT_MAXLEN];
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int id_len;
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ssize_t ret;
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id_len = snprintf(id_str, sizeof(id_str), "%u", id);
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ret = nfs_idmap_get_key(id_str, id_len, type, buf, buflen, idmap);
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if (ret < 0)
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return -EINVAL;
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return ret;
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}
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/* Name -> ID */
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static int nfs_idmap_lookup_id(const char *name, size_t namelen, const char *type,
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__u32 *id, struct idmap *idmap)
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{
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char id_str[NFS_UINT_MAXLEN];
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long id_long;
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ssize_t data_size;
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int ret = 0;
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data_size = nfs_idmap_get_key(name, namelen, type, id_str, NFS_UINT_MAXLEN, idmap);
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if (data_size <= 0) {
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ret = -EINVAL;
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} else {
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ret = kstrtol(id_str, 10, &id_long);
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if (!ret)
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*id = (__u32)id_long;
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}
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return ret;
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}
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/* idmap classic begins here */
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enum {
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Opt_find_uid, Opt_find_gid, Opt_find_user, Opt_find_group, Opt_find_err
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};
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static const match_table_t nfs_idmap_tokens = {
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{ Opt_find_uid, "uid:%s" },
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{ Opt_find_gid, "gid:%s" },
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{ Opt_find_user, "user:%s" },
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{ Opt_find_group, "group:%s" },
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{ Opt_find_err, NULL }
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};
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static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *);
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static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
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size_t);
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static void idmap_release_pipe(struct inode *);
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static void idmap_pipe_destroy_msg(struct rpc_pipe_msg *);
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static const struct rpc_pipe_ops idmap_upcall_ops = {
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.upcall = rpc_pipe_generic_upcall,
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.downcall = idmap_pipe_downcall,
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.release_pipe = idmap_release_pipe,
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.destroy_msg = idmap_pipe_destroy_msg,
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};
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static struct key_type key_type_id_resolver_legacy = {
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.name = "id_legacy",
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.preparse = user_preparse,
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.free_preparse = user_free_preparse,
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.instantiate = generic_key_instantiate,
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.revoke = user_revoke,
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.destroy = user_destroy,
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.describe = user_describe,
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.read = user_read,
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.request_key = nfs_idmap_legacy_upcall,
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};
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static void nfs_idmap_pipe_destroy(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo)
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{
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struct idmap *idmap = pdo->pdo_data;
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struct rpc_pipe *pipe = idmap->idmap_pipe;
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if (pipe->dentry) {
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rpc_unlink(pipe->dentry);
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pipe->dentry = NULL;
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}
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}
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static int nfs_idmap_pipe_create(struct dentry *dir,
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struct rpc_pipe_dir_object *pdo)
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{
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struct idmap *idmap = pdo->pdo_data;
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struct rpc_pipe *pipe = idmap->idmap_pipe;
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struct dentry *dentry;
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dentry = rpc_mkpipe_dentry(dir, "idmap", idmap, pipe);
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if (IS_ERR(dentry))
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return PTR_ERR(dentry);
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pipe->dentry = dentry;
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return 0;
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}
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static const struct rpc_pipe_dir_object_ops nfs_idmap_pipe_dir_object_ops = {
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.create = nfs_idmap_pipe_create,
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.destroy = nfs_idmap_pipe_destroy,
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};
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int
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nfs_idmap_new(struct nfs_client *clp)
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{
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struct idmap *idmap;
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struct rpc_pipe *pipe;
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int error;
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idmap = kzalloc(sizeof(*idmap), GFP_KERNEL);
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if (idmap == NULL)
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return -ENOMEM;
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rpc_init_pipe_dir_object(&idmap->idmap_pdo,
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&nfs_idmap_pipe_dir_object_ops,
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idmap);
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pipe = rpc_mkpipe_data(&idmap_upcall_ops, 0);
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if (IS_ERR(pipe)) {
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error = PTR_ERR(pipe);
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goto err;
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}
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idmap->idmap_pipe = pipe;
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mutex_init(&idmap->idmap_mutex);
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error = rpc_add_pipe_dir_object(clp->cl_net,
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&clp->cl_rpcclient->cl_pipedir_objects,
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&idmap->idmap_pdo);
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if (error)
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goto err_destroy_pipe;
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clp->cl_idmap = idmap;
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return 0;
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err_destroy_pipe:
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rpc_destroy_pipe_data(idmap->idmap_pipe);
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err:
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|
kfree(idmap);
|
|
return error;
|
|
}
|
|
|
|
void
|
|
nfs_idmap_delete(struct nfs_client *clp)
|
|
{
|
|
struct idmap *idmap = clp->cl_idmap;
|
|
|
|
if (!idmap)
|
|
return;
|
|
clp->cl_idmap = NULL;
|
|
rpc_remove_pipe_dir_object(clp->cl_net,
|
|
&clp->cl_rpcclient->cl_pipedir_objects,
|
|
&idmap->idmap_pdo);
|
|
rpc_destroy_pipe_data(idmap->idmap_pipe);
|
|
kfree(idmap);
|
|
}
|
|
|
|
static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap,
|
|
struct idmap_msg *im,
|
|
struct rpc_pipe_msg *msg)
|
|
{
|
|
substring_t substr;
|
|
int token, ret;
|
|
|
|
im->im_type = IDMAP_TYPE_GROUP;
|
|
token = match_token(desc, nfs_idmap_tokens, &substr);
|
|
|
|
switch (token) {
|
|
case Opt_find_uid:
|
|
im->im_type = IDMAP_TYPE_USER;
|
|
case Opt_find_gid:
|
|
im->im_conv = IDMAP_CONV_NAMETOID;
|
|
ret = match_strlcpy(im->im_name, &substr, IDMAP_NAMESZ);
|
|
break;
|
|
|
|
case Opt_find_user:
|
|
im->im_type = IDMAP_TYPE_USER;
|
|
case Opt_find_group:
|
|
im->im_conv = IDMAP_CONV_IDTONAME;
|
|
ret = match_int(&substr, &im->im_id);
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
msg->data = im;
|
|
msg->len = sizeof(struct idmap_msg);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static bool
|
|
nfs_idmap_prepare_pipe_upcall(struct idmap *idmap,
|
|
struct idmap_legacy_upcalldata *data)
|
|
{
|
|
if (idmap->idmap_upcall_data != NULL) {
|
|
WARN_ON_ONCE(1);
|
|
return false;
|
|
}
|
|
idmap->idmap_upcall_data = data;
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
nfs_idmap_complete_pipe_upcall_locked(struct idmap *idmap, int ret)
|
|
{
|
|
struct key_construction *cons = idmap->idmap_upcall_data->key_cons;
|
|
|
|
kfree(idmap->idmap_upcall_data);
|
|
idmap->idmap_upcall_data = NULL;
|
|
complete_request_key(cons, ret);
|
|
}
|
|
|
|
static void
|
|
nfs_idmap_abort_pipe_upcall(struct idmap *idmap, int ret)
|
|
{
|
|
if (idmap->idmap_upcall_data != NULL)
|
|
nfs_idmap_complete_pipe_upcall_locked(idmap, ret);
|
|
}
|
|
|
|
static int nfs_idmap_legacy_upcall(struct key_construction *cons,
|
|
const char *op,
|
|
void *aux)
|
|
{
|
|
struct idmap_legacy_upcalldata *data;
|
|
struct rpc_pipe_msg *msg;
|
|
struct idmap_msg *im;
|
|
struct idmap *idmap = (struct idmap *)aux;
|
|
struct key *key = cons->key;
|
|
int ret = -ENOKEY;
|
|
|
|
if (!aux)
|
|
goto out1;
|
|
|
|
/* msg and im are freed in idmap_pipe_destroy_msg */
|
|
ret = -ENOMEM;
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
goto out1;
|
|
|
|
msg = &data->pipe_msg;
|
|
im = &data->idmap_msg;
|
|
data->idmap = idmap;
|
|
data->key_cons = cons;
|
|
|
|
ret = nfs_idmap_prepare_message(key->description, idmap, im, msg);
|
|
if (ret < 0)
|
|
goto out2;
|
|
|
|
ret = -EAGAIN;
|
|
if (!nfs_idmap_prepare_pipe_upcall(idmap, data))
|
|
goto out2;
|
|
|
|
ret = rpc_queue_upcall(idmap->idmap_pipe, msg);
|
|
if (ret < 0)
|
|
nfs_idmap_abort_pipe_upcall(idmap, ret);
|
|
|
|
return ret;
|
|
out2:
|
|
kfree(data);
|
|
out1:
|
|
complete_request_key(cons, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs_idmap_instantiate(struct key *key, struct key *authkey, char *data, size_t datalen)
|
|
{
|
|
return key_instantiate_and_link(key, data, datalen,
|
|
id_resolver_cache->thread_keyring,
|
|
authkey);
|
|
}
|
|
|
|
static int nfs_idmap_read_and_verify_message(struct idmap_msg *im,
|
|
struct idmap_msg *upcall,
|
|
struct key *key, struct key *authkey)
|
|
{
|
|
char id_str[NFS_UINT_MAXLEN];
|
|
size_t len;
|
|
int ret = -ENOKEY;
|
|
|
|
/* ret = -ENOKEY */
|
|
if (upcall->im_type != im->im_type || upcall->im_conv != im->im_conv)
|
|
goto out;
|
|
switch (im->im_conv) {
|
|
case IDMAP_CONV_NAMETOID:
|
|
if (strcmp(upcall->im_name, im->im_name) != 0)
|
|
break;
|
|
/* Note: here we store the NUL terminator too */
|
|
len = sprintf(id_str, "%d", im->im_id) + 1;
|
|
ret = nfs_idmap_instantiate(key, authkey, id_str, len);
|
|
break;
|
|
case IDMAP_CONV_IDTONAME:
|
|
if (upcall->im_id != im->im_id)
|
|
break;
|
|
len = strlen(im->im_name);
|
|
ret = nfs_idmap_instantiate(key, authkey, im->im_name, len);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t
|
|
idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
|
|
{
|
|
struct rpc_inode *rpci = RPC_I(file_inode(filp));
|
|
struct idmap *idmap = (struct idmap *)rpci->private;
|
|
struct key_construction *cons;
|
|
struct idmap_msg im;
|
|
size_t namelen_in;
|
|
int ret = -ENOKEY;
|
|
|
|
/* If instantiation is successful, anyone waiting for key construction
|
|
* will have been woken up and someone else may now have used
|
|
* idmap_key_cons - so after this point we may no longer touch it.
|
|
*/
|
|
if (idmap->idmap_upcall_data == NULL)
|
|
goto out_noupcall;
|
|
|
|
cons = idmap->idmap_upcall_data->key_cons;
|
|
|
|
if (mlen != sizeof(im)) {
|
|
ret = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
if (copy_from_user(&im, src, mlen) != 0) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (!(im.im_status & IDMAP_STATUS_SUCCESS)) {
|
|
ret = -ENOKEY;
|
|
goto out;
|
|
}
|
|
|
|
namelen_in = strnlen(im.im_name, IDMAP_NAMESZ);
|
|
if (namelen_in == 0 || namelen_in == IDMAP_NAMESZ) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = nfs_idmap_read_and_verify_message(&im,
|
|
&idmap->idmap_upcall_data->idmap_msg,
|
|
cons->key, cons->authkey);
|
|
if (ret >= 0) {
|
|
key_set_timeout(cons->key, nfs_idmap_cache_timeout);
|
|
ret = mlen;
|
|
}
|
|
|
|
out:
|
|
nfs_idmap_complete_pipe_upcall_locked(idmap, ret);
|
|
out_noupcall:
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
idmap_pipe_destroy_msg(struct rpc_pipe_msg *msg)
|
|
{
|
|
struct idmap_legacy_upcalldata *data = container_of(msg,
|
|
struct idmap_legacy_upcalldata,
|
|
pipe_msg);
|
|
struct idmap *idmap = data->idmap;
|
|
|
|
if (msg->errno)
|
|
nfs_idmap_abort_pipe_upcall(idmap, msg->errno);
|
|
}
|
|
|
|
static void
|
|
idmap_release_pipe(struct inode *inode)
|
|
{
|
|
struct rpc_inode *rpci = RPC_I(inode);
|
|
struct idmap *idmap = (struct idmap *)rpci->private;
|
|
|
|
nfs_idmap_abort_pipe_upcall(idmap, -EPIPE);
|
|
}
|
|
|
|
int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_t namelen, kuid_t *uid)
|
|
{
|
|
struct idmap *idmap = server->nfs_client->cl_idmap;
|
|
__u32 id = -1;
|
|
int ret = 0;
|
|
|
|
if (!nfs_map_string_to_numeric(name, namelen, &id))
|
|
ret = nfs_idmap_lookup_id(name, namelen, "uid", &id, idmap);
|
|
if (ret == 0) {
|
|
*uid = make_kuid(&init_user_ns, id);
|
|
if (!uid_valid(*uid))
|
|
ret = -ERANGE;
|
|
}
|
|
trace_nfs4_map_name_to_uid(name, namelen, id, ret);
|
|
return ret;
|
|
}
|
|
|
|
int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size_t namelen, kgid_t *gid)
|
|
{
|
|
struct idmap *idmap = server->nfs_client->cl_idmap;
|
|
__u32 id = -1;
|
|
int ret = 0;
|
|
|
|
if (!nfs_map_string_to_numeric(name, namelen, &id))
|
|
ret = nfs_idmap_lookup_id(name, namelen, "gid", &id, idmap);
|
|
if (ret == 0) {
|
|
*gid = make_kgid(&init_user_ns, id);
|
|
if (!gid_valid(*gid))
|
|
ret = -ERANGE;
|
|
}
|
|
trace_nfs4_map_group_to_gid(name, namelen, id, ret);
|
|
return ret;
|
|
}
|
|
|
|
int nfs_map_uid_to_name(const struct nfs_server *server, kuid_t uid, char *buf, size_t buflen)
|
|
{
|
|
struct idmap *idmap = server->nfs_client->cl_idmap;
|
|
int ret = -EINVAL;
|
|
__u32 id;
|
|
|
|
id = from_kuid(&init_user_ns, uid);
|
|
if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
|
|
ret = nfs_idmap_lookup_name(id, "user", buf, buflen, idmap);
|
|
if (ret < 0)
|
|
ret = nfs_map_numeric_to_string(id, buf, buflen);
|
|
trace_nfs4_map_uid_to_name(buf, ret, id, ret);
|
|
return ret;
|
|
}
|
|
int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf, size_t buflen)
|
|
{
|
|
struct idmap *idmap = server->nfs_client->cl_idmap;
|
|
int ret = -EINVAL;
|
|
__u32 id;
|
|
|
|
id = from_kgid(&init_user_ns, gid);
|
|
if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
|
|
ret = nfs_idmap_lookup_name(id, "group", buf, buflen, idmap);
|
|
if (ret < 0)
|
|
ret = nfs_map_numeric_to_string(id, buf, buflen);
|
|
trace_nfs4_map_gid_to_group(buf, ret, id, ret);
|
|
return ret;
|
|
}
|