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GFS2: ignore unlock failures after withdraw 

After gfs2 has withdrawn the filesystem, it may still have many locks not
in the unlocked state.  If it is using lock_dlm, it will failed trying
the unlocks since it has already unmounted the lock manager. Instead, it
should set the SDF_SKIP_DLM_UNLOCK flag on withdraw, to signal that
it can skip the lock_manager on unlocks, and failback to lock_nolock
style unlocking.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Benjamin Marzinski 2016-03-23 14:29:59 -04:00 committed by Bob Peterson
parent 9dffdb38d8
commit 3e11e53041
2 changed files with 9 additions and 1 deletions
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9
fs/gfs2/glock.c
View File

@ -475,7 +475,14 @@ __acquires(&gl->gl_lockref.lock)
if (sdp->sd_lockstruct.ls_ops->lm_lock) {
/* lock_dlm */
ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags);
if (ret) {
if (ret == -EINVAL && gl->gl_target == LM_ST_UNLOCKED &&
target == LM_ST_UNLOCKED &&
test_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags)) {
finish_xmote(gl, target);
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
gfs2_glock_put(gl);
}
else if (ret) {
pr_err("lm_lock ret %d\n", ret);
GLOCK_BUG_ON(gl, 1);
}

1
fs/gfs2/util.c
View File

@ -68,6 +68,7 @@ int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
fs_err(sdp, "telling LM to unmount\n");
lm->lm_unmount(sdp);
}
set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
fs_err(sdp, "withdrawn\n");
dump_stack();
}