[Cluster-devel] [GFS2 patch] Initialize extent_list earlier

[Bob Peterson <rpeterso@redhat.com>]

Hi,

Here is a patch for the latest upstream GFS2 code:
The journal extent map needs to be initialized sooner than it
currently is.  Otherwise failed mount attempts (e.g. not enough
journals, etc.) may panic trying to access the uninitialized list.

Regards,

Bob Peterson

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
--
 fs/gfs2/ops_fstype.c |    1 -
 fs/gfs2/super.c      |    1 +
 2 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index a77d41f..9ffc10b 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -330,7 +330,6 @@ static int map_journal_extents(struct gfs2_sbd *sdp)
 	struct buffer_head bh;
 	int rc = 0;
 
-	INIT_LIST_HEAD(&jd->extent_list);
 	prev_db = 0;
 
 	for (lb = 0; lb < ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; lb++) {
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 73e49df..fa86038 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -385,6 +385,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 		if (!jd)
 			break;
 
+		INIT_LIST_HEAD(&jd->extent_list);
 		jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL);
 		if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
 			if (!jd->jd_inode)