+
+static int ocfs2_reflink_xattr_buckets(handle_t *handle,
+ struct inode *inode,
+ struct ocfs2_reflink_xattr_tree_args *args,
+ struct ocfs2_extent_tree *et,
+ struct ocfs2_alloc_context *meta_ac,
+ struct ocfs2_alloc_context *data_ac,
+ u64 blkno, u32 cpos, u32 len)
+{
+ int ret, first_inserted = 0;
+ u32 p_cluster, num_clusters, reflink_cpos = 0;
+ u64 new_blkno;
+ unsigned int num_buckets, reflink_buckets;
+ unsigned int bpc =
+ ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
+
+ ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets);
+ ocfs2_xattr_bucket_relse(args->old_bucket);
+
+ while (len && num_buckets) {
+ ret = ocfs2_claim_clusters(handle, data_ac,
+ 1, &p_cluster, &num_clusters);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
+ reflink_buckets = min(num_buckets, bpc * num_clusters);
+
+ ret = ocfs2_reflink_xattr_bucket(handle, blkno,
+ new_blkno, num_clusters,
+ &reflink_cpos, reflink_buckets,
+ meta_ac, data_ac, args);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * For the 1st allocated cluster, we make it use the same cpos
+ * so that the xattr tree looks the same as the original one
+ * in the most case.
+ */
+ if (!first_inserted) {
+ reflink_cpos = cpos;
+ first_inserted = 1;
+ }
+ ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno,
+ num_clusters, 0, meta_ac);
+ if (ret)
+ mlog_errno(ret);
+
+ mlog(0, "insert new xattr extent rec start %llu len %u to %u\n",
+ (unsigned long long)new_blkno, num_clusters, reflink_cpos);
+
+ len -= num_clusters;
+ blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters);
+ num_buckets -= reflink_buckets;
+ }
+out:
+ return ret;
+}
+