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-rw-r--r--fs/ocfs2/alloc.c44
1 files changed, 39 insertions, 5 deletions
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 9edcde4..11085af 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -2476,15 +2476,37 @@ out_ret_path:
return ret;
}
-static void ocfs2_update_edge_lengths(struct inode *inode, handle_t *handle,
- struct ocfs2_path *path)
+static int ocfs2_update_edge_lengths(struct inode *inode, handle_t *handle,
+ int subtree_index, struct ocfs2_path *path)
{
- int i, idx;
+ int i, idx, ret;
struct ocfs2_extent_rec *rec;
struct ocfs2_extent_list *el;
struct ocfs2_extent_block *eb;
u32 range;
+ /*
+ * In normal tree rotation process, we will never touch the
+ * tree branch above subtree_index and ocfs2_extend_rotate_transaction
+ * doesn't reserve the credits for them either.
+ *
+ * But we do have a special case here which will update the rightmost
+ * records for all the bh in the path.
+ * So we have to allocate extra credits and access them.
+ */
+ ret = ocfs2_extend_trans(handle,
+ handle->h_buffer_credits + subtree_index);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_journal_access_path(inode, handle, path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
/* Path should always be rightmost. */
eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
BUG_ON(eb->h_next_leaf_blk != 0ULL);
@@ -2505,6 +2527,8 @@ static void ocfs2_update_edge_lengths(struct inode *inode, handle_t *handle,
ocfs2_journal_dirty(handle, path->p_node[i].bh);
}
+out:
+ return ret;
}
static void ocfs2_unlink_path(struct inode *inode, handle_t *handle,
@@ -2717,7 +2741,12 @@ static int ocfs2_rotate_subtree_left(struct inode *inode, handle_t *handle,
if (del_right_subtree) {
ocfs2_unlink_subtree(inode, handle, left_path, right_path,
subtree_index, dealloc);
- ocfs2_update_edge_lengths(inode, handle, left_path);
+ ret = ocfs2_update_edge_lengths(inode, handle, subtree_index,
+ left_path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
ocfs2_et_set_last_eb_blk(et, le64_to_cpu(eb->h_blkno));
@@ -3034,7 +3063,12 @@ static int ocfs2_remove_rightmost_path(struct inode *inode, handle_t *handle,
ocfs2_unlink_subtree(inode, handle, left_path, path,
subtree_index, dealloc);
- ocfs2_update_edge_lengths(inode, handle, left_path);
+ ret = ocfs2_update_edge_lengths(inode, handle, subtree_index,
+ left_path);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
ocfs2_et_set_last_eb_blk(et, le64_to_cpu(eb->h_blkno));
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