[PATCH 5.6 098/194] NFS: Fix fscache super_cookie allocation

Greg Kroah-Hartman
2020-05-18T18:03:56Z

From: Dave Wysochanski <dwysocha@redhat.com>

[ Upstream commit 15751612734ca0c419ac43ce986c9badcb5e2829 ]

Commit f2aedb713c28 ("NFS: Add fs_context support.") reworked
NFS mount code paths for fs_context support which included
super_block initialization. In the process there was an extra
return left in the code and so we never call
nfs_fscache_get_super_cookie even if 'fsc' is given on as mount
option. In addition, there is an extra check inside
nfs_fscache_get_super_cookie for the NFS_OPTION_FSCACHE which
is unnecessary since the only caller nfs_get_cache_cookie
checks this flag.

Fixes: f2aedb713c28 ("NFS: Add fs_context support.")
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/nfs/fscache.c | 2 --
fs/nfs/super.c | 1 -
2 files changed, 3 deletions(-)

diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index 8eff1fd806b1c..f517184156068 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -118,8 +118,6 @@ void nfs_fscache_get_super_cookie(struct super_block *sb, const char *uniq, int

nfss->fscache_key = NULL;
nfss->fscache = NULL;
- if (!(nfss->options & NFS_OPTION_FSCACHE))
- return;
if (!uniq) {
uniq = "";
ulen = 1;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index dada09b391c65..c0d5240b8a0ac 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1154,7 +1154,6 @@ static void nfs_get_cache_cookie(struct super_block *sb,
uniq = ctx->fscache_uniq;
ulen = strlen(ctx->fscache_uniq);
}
- return;
}

nfs_fscache_get_super_cookie(sb, uniq, ulen);
--
2.20.1