[GFS2] Fix a couple of refcount leaks.

recovery.c add a brelse to deal with gfs2_replay_read_block being called
twice on the same block.

add a dput to drop the ref count on the root inode.
This was causing lingering glocks and thus causing
a mount failure to hang.

Fix a endian conversion macro that was was swizzling
16bits when it should have been swizzling 32.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/glock.c

@@ -2167,7 +2167,9 @@ static int dump_glock(struct gfs2_glock *gl)
 
 	spin_lock(&gl->gl_spin);
 
-	printk(KERN_INFO "Glock (%u, %llu)\n", gl->gl_name.ln_type,
+	printk(KERN_INFO "Glock 0x%p (%u, %llu)\n",
+	       gl,
+	       gl->gl_name.ln_type,
 	       (unsigned long long)gl->gl_name.ln_number);
 	printk(KERN_INFO "  gl_flags =");
 	for (x = 0; x < 32; x++)
@@ -2187,8 +2189,9 @@ static int dump_glock(struct gfs2_glock *gl)
 	printk(KERN_INFO "  reclaim = %s\n",
 		    (list_empty(&gl->gl_reclaim)) ? "no" : "yes");
 	if (gl->gl_aspace)
-		printk(KERN_INFO "  aspace = %lu\n",
-			    gl->gl_aspace->i_mapping->nrpages);
+		printk(KERN_INFO "  aspace = 0x%p nrpages = %lu\n",
+		       gl->gl_aspace,
+		       gl->gl_aspace->i_mapping->nrpages);
 	else
 		printk(KERN_INFO "  aspace = no\n");
 	printk(KERN_INFO "  ail = %d\n", atomic_read(&gl->gl_ail_count));

fs/gfs2/ops_fstype.c

@@ -279,6 +279,10 @@ static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 	int error = 0;
 
 	if (undo) {
+		if (sb->s_root) {
+			dput(sb->s_root);
+			sb->s_root = NULL;
+		}
 		return 0;
 	}
 

fs/gfs2/recovery.c

@@ -325,6 +325,7 @@ static int foreach_descriptor(struct gfs2_jdesc *jd, unsigned int start,
 			error = get_log_header(jd, start, &lh);
 			if (!error) {
 				gfs2_replay_incr_blk(sdp, &start);
+				brelse(bh);
 				continue;
 			}
 			if (error == 1) {
@@ -396,7 +397,7 @@ static int clean_journal(struct gfs2_jdesc *jd, struct gfs2_log_header *head)
 	lh = (struct gfs2_log_header *)bh->b_data;
 	memset(lh, 0, sizeof(struct gfs2_log_header));
 	lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
-	lh->lh_header.mh_type = cpu_to_be16(GFS2_METATYPE_LH);
+	lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH);
 	lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH);
 	lh->lh_sequence = cpu_to_be64(head->lh_sequence + 1);
 	lh->lh_flags = cpu_to_be32(GFS2_LOG_HEAD_UNMOUNT);