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NFS: Don't gratuitously clear the inode cache when lookup failed 

[ Upstream commit 47397915ede0192235474b145ebcd81b37b03624 ]

The fact that the lookup revalidation failed, does not mean that the
inode contents have changed.

Fixes: 5ceb9d7fda ("NFS: Refactor nfs_lookup_revalidate()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust 2021-03-08 14:42:52 -05:00 committed by Greg Kroah-Hartman
parent d29f9aa6a8
commit 86954a52d8
1 changed files with 8 additions and 12 deletions
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20
fs/nfs/dir.c
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@ -1116,18 +1116,14 @@ nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,
__func__, dentry);
return 1;
case 0:
if (inode && S_ISDIR(inode->i_mode)) {
/* Purge readdir caches. */
nfs_zap_caches(inode);
/*
* We can't d_drop the root of a disconnected tree:
* its d_hash is on the s_anon list and d_drop() would hide
* it from shrink_dcache_for_unmount(), leading to busy
* inodes on unmount and further oopses.
*/
if (IS_ROOT(dentry))
return 1;
}
/*
* We can't d_drop the root of a disconnected tree:
* its d_hash is on the s_anon list and d_drop() would hide
* it from shrink_dcache_for_unmount(), leading to busy
* inodes on unmount and further oopses.
*/
if (inode && IS_ROOT(dentry))
return 1;
dfprintk(LOOKUPCACHE, "NFS: %s(%pd2) is invalid\n",
__func__, dentry);
return 0;