[PATCH 5.11 247/306] NFS: Dont gratuitously clear the inode cache when lookup failed
From: gregkh@linuxfoundation.org
Date: 2021-03-15 14:49:50
Also in:
lkml
Subsystem:
filesystems (vfs and infrastructure), nfs, sunrpc, and lockd clients, the rest · Maintainers:
Alexander Viro, Christian Brauner, Trond Myklebust, Anna Schumaker, Linus Torvalds
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From: Trond Myklebust <redacted>
[ Upstream commit 47397915ede0192235474b145ebcd81b37b03624 ]
The fact that the lookup revalidation failed, does not mean that the
inode contents have changed.
Fixes: 5ceb9d7fdaaf ("NFS: Refactor nfs_lookup_revalidate()")
Signed-off-by: Trond Myklebust <redacted>
Signed-off-by: Anna Schumaker <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfs/dir.c | 20 ++++++++------------
1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 7bcc6fcf1096..4db3018776f6 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c@@ -1444,18 +1444,14 @@ 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;
--
2.30.1