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authorBob Peterson <rpeterso@redhat.com>2017-03-03 12:37:14 -0500
committerBob Peterson <rpeterso@redhat.com>2017-03-16 08:18:35 -0400
commit0d1c7ae9d849bdd3146e322f1e46fd3300e66d5f (patch)
treeedf72c572f1b7d42fcf817f5e6e1d93f8c93037b /fs/gfs2/glock.c
parent69eea5a4ab9c705496e912b55a9d312325de19e6 (diff)
downloadlinux-0d1c7ae9d849bdd3146e322f1e46fd3300e66d5f.tar.bz2
GFS2: Prevent BUG from occurring when normal Withdraws occur
When the GFS2 file system withdraws due to metadata corruption, it often has outstanding transactions in the journal and delayed work queued for its glocks. This patch adds some new checks for a withdrawn file system before proceeding with operations that would obviously cause a BUG() to be triggered. That allows GFS2 to be safely unmounted rather than cause the system to go down. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/glock.c')
-rw-r--r--fs/gfs2/glock.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index ec0848fcca02..694167b4e512 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -449,6 +449,8 @@ __acquires(&gl->gl_lockref.lock)
unsigned int lck_flags = (unsigned int)(gh ? gh->gh_flags : 0);
int ret;
+ if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ return;
lck_flags &= (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP |
LM_FLAG_PRIORITY);
GLOCK_BUG_ON(gl, gl->gl_state == target);