btrfs-progs: qgroup: use on-stack path buffer in repair_qgroup_info

We don't need to conserve stack space too much unlike kernel, also
remove one error condition.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/qgroup-verify.c b/qgroup-verify.c
index 9a56f59..f5760de 100644 (file)
--- a/qgroup-verify.c
+++ b/qgroup-verify.c
@@ -1479,27 +1479,22 @@ static int repair_qgroup_info(struct btrfs_fs_info *info,
        int ret;
        struct btrfs_root *root = info->quota_root;
        struct btrfs_trans_handle *trans;
-       struct btrfs_path *path;
+       struct btrfs_path path;
        struct btrfs_qgroup_info_item *info_item;
        struct btrfs_key key;
 
        printf("Repair qgroup %llu/%llu\n", btrfs_qgroup_level(count->qgroupid),
               btrfs_qgroup_subvid(count->qgroupid));
 
-       path = btrfs_alloc_path();
-       if (!path)
-               return -ENOMEM;
-
        trans = btrfs_start_transaction(root, 1);
-       if (IS_ERR(trans)) {
-               btrfs_free_path(path);
+       if (IS_ERR(trans))
                return PTR_ERR(trans);
-       }
 
+       btrfs_init_path(&path);
        key.objectid = 0;
        key.type = BTRFS_QGROUP_INFO_KEY;
        key.offset = count->qgroupid;
-       ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+       ret = btrfs_search_slot(trans, root, &key, &path, 0, 1);
        if (ret) {
                error("Could not find disk item for qgroup %llu/%llu.\n",
                      btrfs_qgroup_level(count->qgroupid),
@@ -1509,27 +1504,27 @@ static int repair_qgroup_info(struct btrfs_fs_info *info,
                goto out;
        }
 
-       info_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+       info_item = btrfs_item_ptr(path.nodes[0], path.slots[0],
                                   struct btrfs_qgroup_info_item);
 
-       btrfs_set_qgroup_info_generation(path->nodes[0], info_item,
+       btrfs_set_qgroup_info_generation(path.nodes[0], info_item,
                                         trans->transid);
 
-       btrfs_set_qgroup_info_referenced(path->nodes[0], info_item,
+       btrfs_set_qgroup_info_referenced(path.nodes[0], info_item,
                                         count->info.referenced);
-       btrfs_set_qgroup_info_referenced_compressed(path->nodes[0], info_item,
+       btrfs_set_qgroup_info_referenced_compressed(path.nodes[0], info_item,
                                            count->info.referenced_compressed);
 
-       btrfs_set_qgroup_info_exclusive(path->nodes[0], info_item,
+       btrfs_set_qgroup_info_exclusive(path.nodes[0], info_item,
                                        count->info.exclusive);
-       btrfs_set_qgroup_info_exclusive_compressed(path->nodes[0], info_item,
+       btrfs_set_qgroup_info_exclusive_compressed(path.nodes[0], info_item,
                                           count->info.exclusive_compressed);
 
-       btrfs_mark_buffer_dirty(path->nodes[0]);
+       btrfs_mark_buffer_dirty(path.nodes[0]);
 
 out:
        btrfs_commit_transaction(trans, root);
-       btrfs_free_path(path);
+       btrfs_release_path(&path);
 
        return ret;
 }