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@@ -155,6 +155,72 @@ out:
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return ret;
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}
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+static int list_subvolums(struct btrfs_fs_info *fs_info)
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+{
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+ struct btrfs_root *tree_root = fs_info->tree_root;
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+ struct btrfs_root *root;
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+ struct btrfs_path path;
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+ struct btrfs_key key;
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+ char *result;
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+ int ret = 0;
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+
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+ result = malloc(PATH_MAX);
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+ if (!result)
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+ return -ENOMEM;
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+
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+ ret = list_one_subvol(fs_info->fs_root, result);
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+ if (ret < 0)
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+ goto out;
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+ root = fs_info->fs_root;
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+ printf("ID %llu gen %llu path %.*s\n",
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+ root->root_key.objectid, btrfs_root_generation(&root->root_item),
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+ PATH_MAX, result);
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+
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+ key.objectid = BTRFS_FIRST_FREE_OBJECTID;
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+ key.type = BTRFS_ROOT_ITEM_KEY;
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+ key.offset = 0;
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+ btrfs_init_path(&path);
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+ ret = btrfs_search_slot(NULL, tree_root, &key, &path, 0, 0);
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+ if (ret < 0)
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+ goto out;
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+ while (1) {
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+ if (path.slots[0] >= btrfs_header_nritems(path.nodes[0]))
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+ goto next;
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+
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+ btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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+ if (key.objectid > BTRFS_LAST_FREE_OBJECTID)
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+ break;
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+ if (key.objectid < BTRFS_FIRST_FREE_OBJECTID ||
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+ key.type != BTRFS_ROOT_ITEM_KEY)
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+ goto next;
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+ key.offset = (u64)-1;
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+ root = btrfs_read_fs_root(fs_info, &key);
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+ if (IS_ERR(root)) {
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+ ret = PTR_ERR(root);
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+ if (ret == -ENOENT)
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+ goto next;
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+ }
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+ ret = list_one_subvol(root, result);
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+ if (ret < 0)
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+ goto out;
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+ printf("ID %llu gen %llu path %.*s\n",
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+ root->root_key.objectid,
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+ btrfs_root_generation(&root->root_item),
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+ PATH_MAX, result);
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+next:
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+ ret = btrfs_next_item(tree_root, &path);
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+ if (ret < 0)
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+ goto out;
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+ if (ret > 0) {
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+ ret = 0;
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+ break;
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+ }
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+ }
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+out:
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+ free(result);
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+ return ret;
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+}
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+
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static int get_subvol_name(u64 subvolid, char *name, int max_len)
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{
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struct btrfs_root_ref rref;
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@@ -268,10 +334,12 @@ static void list_subvols(u64 tree, char *nameptr, int max_name_len, int level)
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void btrfs_list_subvols(void)
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{
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- char *nameptr = malloc(4096);
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-
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- list_subvols(BTRFS_FS_TREE_OBJECTID, nameptr, nameptr ? 4096 : 0, 40);
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+ struct btrfs_fs_info *fs_info = current_fs_info;
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+ int ret;
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- if (nameptr)
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- free(nameptr);
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+ if (!fs_info)
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+ return;
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+ ret = list_subvolums(fs_info);
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+ if (ret < 0)
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+ error("failed to list subvolume: %d", ret);
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}
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