1 files changed, 48 insertions, 32 deletions

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index ed1e9596756..4dba3475882 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -3936,9 +3936,10 @@ out:
 }
 
 /*
- * Copy one xattr cluster from src_blk to to_blk.
- * The to_blk will become the first bucket header of the cluster, so its
- * xh_num_buckets will be initialized as the bucket num in the cluster.
+ * src_blk points to the last cluster of an existing extent.  to_blk
+ * points to a newly allocated extent.  We copy the cluster over to the
+ * new extent, initializing its xh_num_buckets.  The old extent's
+ * xh_num_buckets shrinks by the same amount.
  */
 static int ocfs2_cp_xattr_cluster(struct inode *inode,
 				  handle_t *handle,
@@ -3950,27 +3951,42 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
 	int i, ret, credits;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 	int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
+	int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
 	int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
-	struct buffer_head *bh = NULL;
-	struct ocfs2_xattr_header *xh;
-	u64 to_blk_start = to_blk;
+	struct ocfs2_xattr_bucket *old_first, *new_first;
 
 	mlog(0, "cp xattrs from cluster %llu to %llu\n",
 	     (unsigned long long)src_blk, (unsigned long long)to_blk);
 
+	/* The first bucket of the original extent */
+	old_first = ocfs2_xattr_bucket_new(inode);
+	/* The first bucket of the new extent */
+	new_first = ocfs2_xattr_bucket_new(inode);
+	if (!old_first || !new_first) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_read_xattr_bucket(old_first, first_bh->b_blocknr);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
 	/*
-	 * We need to update the new cluster and 1 more for the update of
-	 * the 1st bucket of the previous extent rec.
+	 * We need to update the first bucket of the old extent and the
+	 * entire first cluster of the new extent.
 	 */
-	credits = bpc + 1 + handle->h_buffer_credits;
+	credits = blks_per_bucket + bpc + handle->h_buffer_credits;
 	ret = ocfs2_extend_trans(handle, credits);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
 	}
 
-	ret = ocfs2_journal_access(handle, inode, first_bh,
-				   OCFS2_JOURNAL_ACCESS_WRITE);
+	ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
+						OCFS2_JOURNAL_ACCESS_WRITE);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
@@ -3978,45 +3994,45 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
 
 	for (i = 0; i < num_buckets; i++) {
 		ret = ocfs2_cp_xattr_bucket(inode, handle,
-					    src_blk, to_blk, 1);
+					    src_blk + (i * blks_per_bucket),
+					    to_blk + (i * blks_per_bucket),
+					    1);
 		if (ret) {
 			mlog_errno(ret);
 			goto out;
 		}
-
-		src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
-		to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
 	}
 
-	/* update the old bucket header. */
-	xh = (struct ocfs2_xattr_header *)first_bh->b_data;
-	le16_add_cpu(&xh->xh_num_buckets, -num_buckets);
-
-	ocfs2_journal_dirty(handle, first_bh);
-
-	/* update the new bucket header. */
-	ret = ocfs2_read_block(inode, to_blk_start, &bh, NULL);
-	if (ret < 0) {
+	/*
+	 * Get the new bucket ready before we dirty anything
+	 * (This actually shouldn't fail, because we already dirtied
+	 * it once in ocfs2_cp_xattr_bucket()).
+	 */
+	ret = ocfs2_read_xattr_bucket(new_first, to_blk);
+	if (ret) {
 		mlog_errno(ret);
 		goto out;
 	}
-
-	ret = ocfs2_journal_access(handle, inode, bh,
-				   OCFS2_JOURNAL_ACCESS_WRITE);
+	ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
+						OCFS2_JOURNAL_ACCESS_WRITE);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
 	}
 
-	xh = (struct ocfs2_xattr_header *)bh->b_data;
-	xh->xh_num_buckets = cpu_to_le16(num_buckets);
+	/* Now update the headers */
+	le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
+	ocfs2_xattr_bucket_journal_dirty(handle, old_first);
 
-	ocfs2_journal_dirty(handle, bh);
+	bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
+	ocfs2_xattr_bucket_journal_dirty(handle, new_first);
 
 	if (first_hash)
-		*first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
+		*first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
+
 out:
-	brelse(bh);
+	ocfs2_xattr_bucket_free(new_first);
+	ocfs2_xattr_bucket_free(old_first);
 	return ret;
 }