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NFS: nfs_lookup_revalidate should not trust an inode with i_nlink == 0

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If the inode has no links, then we should force a new lookup.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2012-12-14 17:51:40 -05:00
parent 1f018458b3
commit 65a0c14954
1 changed files with 8 additions and 3 deletions
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11
fs/nfs/dir.c
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@ -978,10 +978,11 @@ static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
* particular file and the "nocto" mount flag is not set. * particular file and the "nocto" mount flag is not set.
* *
*/ */
static inline static
int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags) int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
{ {
struct nfs_server *server = NFS_SERVER(inode); struct nfs_server *server = NFS_SERVER(inode);
int ret;
if (IS_AUTOMOUNT(inode)) if (IS_AUTOMOUNT(inode))
return 0; return 0;
@ -992,9 +993,13 @@ int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) && if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
goto out_force; goto out_force;
return 0; out:
return (inode->i_nlink == 0) ? -ENOENT : 0;
out_force: out_force:
return __nfs_revalidate_inode(server, inode); ret = __nfs_revalidate_inode(server, inode);
if (ret != 0)
return ret;
goto out;
} }
/* /*