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gfs2: fix glock confusion in function signal_our_withdraw

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If go_free is defined, function signal_our_withdraw is supposed to
synchronize on the GLF_FREEING flag of the inode glock, but it
accidentally does that on the live glock. Fix that and disambiguate
the glock variables.

Fixes: 601ef0d52e ("gfs2: Force withdraw to replay journals and wait for it to finish")
Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Bob Peterson 2021-01-18 15:18:59 -05:00
parent 4a011849f7
commit f5f02fde9f
1 changed files with 9 additions and 7 deletions
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16
fs/gfs2/util.c
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@ -118,9 +118,10 @@ void gfs2_freeze_unlock(struct gfs2_holder *freeze_gh)
static void signal_our_withdraw(struct gfs2_sbd *sdp)
{
struct gfs2_glock *gl = sdp->sd_live_gh.gh_gl;
struct gfs2_glock *live_gl = sdp->sd_live_gh.gh_gl;
struct inode *inode = sdp->sd_jdesc->jd_inode;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_glock *i_gl = ip->i_gl;
u64 no_formal_ino = ip->i_no_formal_ino;
int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
int ret = 0;
@ -180,7 +181,8 @@ static void signal_our_withdraw(struct gfs2_sbd *sdp)
atomic_set(&sdp->sd_freeze_state, SFS_FROZEN);
thaw_super(sdp->sd_vfs);
} else {
wait_on_bit(&gl->gl_flags, GLF_DEMOTE, TASK_UNINTERRUPTIBLE);
wait_on_bit(&i_gl->gl_flags, GLF_DEMOTE,
TASK_UNINTERRUPTIBLE);
}
/*
@ -200,15 +202,15 @@ static void signal_our_withdraw(struct gfs2_sbd *sdp)
* on other nodes to be successful, otherwise we remain the owner of
* the glock as far as dlm is concerned.
*/
if (gl->gl_ops->go_free) {
set_bit(GLF_FREEING, &gl->gl_flags);
wait_on_bit(&gl->gl_flags, GLF_FREEING, TASK_UNINTERRUPTIBLE);
if (i_gl->gl_ops->go_free) {
set_bit(GLF_FREEING, &i_gl->gl_flags);
wait_on_bit(&i_gl->gl_flags, GLF_FREEING, TASK_UNINTERRUPTIBLE);
}
/*
* Dequeue the "live" glock, but keep a reference so it's never freed.
*/
gfs2_glock_hold(gl);
gfs2_glock_hold(live_gl);
gfs2_glock_dq_wait(&sdp->sd_live_gh);
/*
* We enqueue the "live" glock in EX so that all other nodes
@ -247,7 +249,7 @@ static void signal_our_withdraw(struct gfs2_sbd *sdp)
gfs2_glock_nq(&sdp->sd_live_gh);
}
gfs2_glock_queue_put(gl); /* drop the extra reference we acquired */
gfs2_glock_queue_put(live_gl); /* drop extra reference we acquired */
clear_bit(SDF_WITHDRAW_RECOVERY, &sdp->sd_flags);
/*