Signed-off-by: Nikolay Borisov <nbori...@suse.com>
---
fs/btrfs/ctree.c | 32 ++++++++++++++++++++++----------
1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 880f4f693263..1f001d31bda8 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2653,18 +2653,30 @@ int btrfs_find_item(struct btrfs_root *fs_root, struct
btrfs_path *path,
return 0;
}
-/*
- * look for key in the tree. path is filled in with nodes along the way
- * if key is found, we return zero and you can find the item in the leaf
- * level of the path (level 0)
+/* btrfs_search_slot - look for a key in a tree and perform necessary
+ * modifications to preserve tree invariants.
+ *
+ * @trans: Handle of transaction, used when modifying the tree
+ * @p: Holds all btree nodes along the search path
+ * @root: The root node of the tree
+ * @key: The key we are looking for
+ * @ins_len: Indicates purpose of search, for inserts it is 1, for
+ * deletions it's -1. 0 for plain searches
+ * @cow: boolean should CoW operations be performed. Must always be 1
+ * when modifying the tree.
+ *
+ * If @ins_len > 0, nodes and leaves will be split as we walk down the tree.
+ * If @ins_len < 0, nodes will be merged as we walk down the tree (if possible)
+ *
+ * If @key is found, 0 is returned and you can find the item in the leaf level
+ * of the path (level 0)
*
- * If the key isn't found, the path points to the slot where it should
- * be inserted, and 1 is returned. If there are other errors during the
- * search a negative error number is returned.
+ * If @key isn't found, 1 is returned and the leaf level of the path (level 0)
+ * points to the slot where it should be inserted
+ * be inserted, and 1 is returned.
*
- * if ins_len > 0, nodes and leaves will be split as we walk down the
- * tree. if ins_len < 0, nodes will be merged as we walk down the tree (if
- * possible)
+ * If an error is encountered while searching the tree a negative error number
+ * is returned
*/
int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
*root,
const struct btrfs_key *key, struct btrfs_path *p,
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
