[PATCH v9 17/27] NFS: Readdirplus can't help lookup for case insensitive filesystems

[trondmy@xxxxxxxxxx]

From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>

If the filesystem is case insensitive, then readdirplus can't help with
cache misses, since it won't return case folded variants of the filename.

Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
 fs/nfs/dir.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index c5c7175a257c..5892c4ee3a6d 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -694,6 +694,8 @@ void nfs_readdir_record_entry_cache_miss(struct inode *dir)
 
 static void nfs_lookup_advise_force_readdirplus(struct inode *dir)
 {
+	if (nfs_server_capable(dir, NFS_CAP_CASE_INSENSITIVE))
+		return;
 	nfs_readdir_record_entry_cache_miss(dir);
 }
 
-- 
2.35.1