btrfs: use btrfs_for_each_slot in btrfs_unlink_all_paths

This function can be simplified by refactoring to use the new iterator
macro.  No functional changes.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Signed-off-by: Gabriel Niebler <gniebler@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index d6edb7d..cf86f1e 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6110,8 +6110,11 @@ static int btrfs_unlink_all_paths(struct send_ctx *sctx)
 {
        LIST_HEAD(deleted_refs);
        struct btrfs_path *path;
+       struct btrfs_root *root = sctx->parent_root;
        struct btrfs_key key;
+       struct btrfs_key found_key;
        struct parent_paths_ctx ctx;
+       int iter_ret = 0;
        int ret;
 
        path = alloc_path_for_send();
@@ -6121,39 +6124,26 @@ static int btrfs_unlink_all_paths(struct send_ctx *sctx)
        key.objectid = sctx->cur_ino;
        key.type = BTRFS_INODE_REF_KEY;
        key.offset = 0;
-       ret = btrfs_search_slot(NULL, sctx->parent_root, &key, path, 0, 0);
-       if (ret < 0)
-               goto out;
 
        ctx.refs = &deleted_refs;
        ctx.sctx = sctx;
 
-       while (true) {
-               struct extent_buffer *eb = path->nodes[0];
-               int slot = path->slots[0];
-
-               if (slot >= btrfs_header_nritems(eb)) {
-                       ret = btrfs_next_leaf(sctx->parent_root, path);
-                       if (ret < 0)
-                               goto out;
-                       else if (ret > 0)
-                               break;
-                       continue;
-               }
-
-               btrfs_item_key_to_cpu(eb, &key, slot);
-               if (key.objectid != sctx->cur_ino)
+       btrfs_for_each_slot(root, &key, &found_key, path, iter_ret) {
+               if (found_key.objectid != key.objectid)
                        break;
-               if (key.type != BTRFS_INODE_REF_KEY &&
-                   key.type != BTRFS_INODE_EXTREF_KEY)
+               if (found_key.type != key.type &&
+                   found_key.type != BTRFS_INODE_EXTREF_KEY)
                        break;
 
-               ret = iterate_inode_ref(sctx->parent_root, path, &key, 1,
+               ret = iterate_inode_ref(root, path, &found_key, 1,
                                        record_parent_ref, &ctx);
                if (ret < 0)
                        goto out;
-
-               path->slots[0]++;
+       }
+       /* Catch error found during iteration */
+       if (iter_ret < 0) {
+               ret = iter_ret;
+               goto out;
        }
 
        while (!list_empty(&deleted_refs)) {