[PATCH] vfs: Don't reject unknown parameters

From: Laura Abbott
Date: Thu Dec 12 2019 - 09:50:52 EST

The new mount API currently rejects unknown parameters if the
filesystem doesn't have doesn't take any arguments. This is
unfortunately a regression from the old API which silently
ignores extra arguments. This is easly seen with the squashfs
conversion (5a2be1288b51 ("vfs: Convert squashfs to use the new
mount API")) which now fails to mount with extra options. Just
get rid of the error.

Fixes: 3e1aeb00e6d1 ("vfs: Implement a filesystem superblock
creation/configuration context")
Link: https://lore.kernel.org/lkml/20191130181548.GA28459@xxxxxxxxxxxxxx/
Reported-by: Jeremi Piotrowski <jeremi.piotrowski@xxxxxxxxx>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1781863
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
fs/fs_context.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/fs_context.c b/fs/fs_context.c
index 138b5b4d621d..7ec20b1f8a53 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -160,8 +160,7 @@ int vfs_parse_fs_param(struct fs_context *fc, struct fs_parameter *param)
return 0;

- return invalf(fc, "%s: Unknown parameter '%s'",
- fc->fs_type->name, param->key);
+ return 0;