[PATCH 6/6] GFS2: Prevent recovery before the local journal is set

Steven Whitehouse
2014-06-03T11:03:21Z

From: Bob Peterson <rpeterso@redhat.com>

This patch uses a completion to prevent dlm's recovery process from
referencing and trying to recover a journal before a journal has been
opened.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 2434a96..67d310c 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -728,6 +728,8 @@ struct gfs2_sbd {
struct gfs2_holder sd_sc_gh;
struct gfs2_holder sd_qc_gh;

+ struct completion sd_journal_ready;
+
/* Daemon stuff */

struct task_struct *sd_logd_process;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index be45c79..bc564c0 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -94,6 +94,7 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
INIT_LIST_HEAD(&sdp->sd_jindex_list);
spin_lock_init(&sdp->sd_jindex_spin);
mutex_init(&sdp->sd_jindex_mutex);
+ init_completion(&sdp->sd_journal_ready);

INIT_LIST_HEAD(&sdp->sd_quota_list);
mutex_init(&sdp->sd_quota_mutex);
@@ -796,6 +797,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
goto fail_qinode;

error = init_journal(sdp, undo);
+ complete_all(&sdp->sd_journal_ready);
if (error)
goto fail;

@@ -1212,6 +1214,7 @@ fail_sb:
fail_locking:
init_locking(sdp, &mount_gh, UNDO);
fail_lm:
+ complete_all(&sdp->sd_journal_ready);
gfs2_gl_hash_clear(sdp);
gfs2_lm_unmount(sdp);
fail_debug:
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 7bc17ed..0e049f9 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -407,6 +407,9 @@ int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
struct gfs2_jdesc *jd;
int rv;

+ /* Wait for our primary journal to be initialized */
+ wait_for_completion(&sdp->sd_journal_ready);
+
spin_lock(&sdp->sd_jindex_spin);
rv = -EBUSY;
if (sdp->sd_jdesc->jd_jid == jid)
--
1.8.3.1