From: Bob Peterson rpeterso@redhat.com
[ Upstream commit ff132c5f93c06bd4432bbab5c369e468653bdec4 ]
Before this patch, gfs2's freeze function failed to report an error when the target file system was already frozen as it should (and as generic vfs function freeze_super does. Similarly, gfs2's thaw function failed to report an error when trying to thaw a file system that is not frozen, as vfs function thaw_super does. The errors were checked, but it always returned a 0 return code.
This patch adds the missing error return codes to gfs2 freeze and thaw.
Signed-off-by: Bob Peterson rpeterso@redhat.com Signed-off-by: Andreas Gruenbacher agruenba@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/gfs2/super.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 50c925d9c610..9c593fd50c6a 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -757,11 +757,13 @@ void gfs2_freeze_func(struct work_struct *work) static int gfs2_freeze(struct super_block *sb) { struct gfs2_sbd *sdp = sb->s_fs_info; - int error = 0; + int error;
mutex_lock(&sdp->sd_freeze_mutex); - if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) + if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) { + error = -EBUSY; goto out; + }
if (test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) { error = -EINVAL; @@ -798,10 +800,10 @@ static int gfs2_unfreeze(struct super_block *sb) struct gfs2_sbd *sdp = sb->s_fs_info;
mutex_lock(&sdp->sd_freeze_mutex); - if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || + if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN || !gfs2_holder_initialized(&sdp->sd_freeze_gh)) { mutex_unlock(&sdp->sd_freeze_mutex); - return 0; + return -EINVAL; }
gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);