struct btrfs_fs_info *current_fs_info;
-static int show_dir(struct btrfs_root *root, struct extent_buffer *eb,
- struct btrfs_dir_item *di)
-{
- struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_inode_item ii;
- struct btrfs_key key;
- static const char* dir_item_str[] = {
- [BTRFS_FT_REG_FILE] = " ",
- [BTRFS_FT_DIR] = "DIR",
- [BTRFS_FT_CHRDEV] = "CHR",
- [BTRFS_FT_BLKDEV] = "BLK",
- [BTRFS_FT_FIFO] = "FIF",
- [BTRFS_FT_SOCK] = "SCK",
- [BTRFS_FT_SYMLINK] = "SYM",
- };
- u8 type = btrfs_dir_type(eb, di);
- char namebuf[BTRFS_NAME_LEN];
- char *target = NULL;
- char filetime[32];
- time_t mtime;
- int ret = 0;
-
- /* skip XATTRs in directory listing */
- if (type == BTRFS_FT_XATTR)
- return 0;
-
- btrfs_dir_item_key_to_cpu(eb, di, &key);
-
- if (key.type == BTRFS_ROOT_ITEM_KEY) {
- struct btrfs_root *subvol;
-
- /* It's a subvolume, get its mtime from root item */
- subvol = btrfs_read_fs_root(fs_info, &key);
- if (IS_ERR(subvol)) {
- ret = PTR_ERR(subvol);
- error("Can't find root %llu", key.objectid);
- return ret;
- }
- mtime = btrfs_stack_timespec_sec(&subvol->root_item.otime);
- } else {
- struct btrfs_path path;
-
- /* It's regular inode, get its mtime from inode item */
- btrfs_init_path(&path);
- ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
- if (ret > 0)
- ret = -ENOENT;
- if (ret < 0) {
- error("Can't find inode %llu", key.objectid);
- btrfs_release_path(&path);
- return ret;
- }
- read_extent_buffer(path.nodes[0], &ii,
- btrfs_item_ptr_offset(path.nodes[0], path.slots[0]),
- sizeof(ii));
- btrfs_release_path(&path);
- mtime = btrfs_stack_timespec_sec(&ii.mtime);
- }
- ctime_r(&mtime, filetime);
-
- if (type == BTRFS_FT_SYMLINK) {
- target = malloc(fs_info->sectorsize);
- if (!target) {
- error("Can't alloc memory for symlink %llu",
- key.objectid);
- return -ENOMEM;
- }
- ret = btrfs_readlink(root, key.objectid, target);
- if (ret < 0) {
- error("Failed to read symlink %llu", key.objectid);
- goto out;
- }
- target[ret] = '\0';
- }
-
- if (type < ARRAY_SIZE(dir_item_str) && dir_item_str[type])
- printf("<%s> ", dir_item_str[type]);
- else
- printf("?%3u? ", type);
- if (type == BTRFS_FT_CHRDEV || type == BTRFS_FT_BLKDEV) {
- ASSERT(key.type == BTRFS_INODE_ITEM_KEY);
- printf("%4llu,%5llu ", btrfs_stack_inode_rdev(&ii) >> 20,
- btrfs_stack_inode_rdev(&ii) & 0xfffff);
- } else {
- if (key.type == BTRFS_INODE_ITEM_KEY)
- printf("%10llu ", btrfs_stack_inode_size(&ii));
- else
- printf("%10llu ", 0ULL);
- }
-
- read_extent_buffer(eb, namebuf, (unsigned long)(di + 1),
- btrfs_dir_name_len(eb, di));
- printf("%24.24s %.*s", filetime, btrfs_dir_name_len(eb, di), namebuf);
- if (type == BTRFS_FT_SYMLINK)
- printf(" -> %s", target ? target : "?");
- printf("\n");
-out:
- free(target);
- return ret;
-}
-
int btrfs_probe(struct blk_desc *fs_dev_desc,
struct disk_partition *fs_partition)
{
return ret;
}
-int btrfs_ls(const char *path)
-{
- struct btrfs_fs_info *fs_info = current_fs_info;
- struct btrfs_root *root = fs_info->fs_root;
- u64 ino = BTRFS_FIRST_FREE_OBJECTID;
- u8 type;
- int ret;
-
- ASSERT(fs_info);
- ret = btrfs_lookup_path(fs_info->fs_root, BTRFS_FIRST_FREE_OBJECTID,
- path, &root, &ino, &type, 40);
- if (ret < 0) {
- printf("Cannot lookup path %s\n", path);
- return ret;
- }
-
- if (type != BTRFS_FT_DIR) {
- error("Not a directory: %s", path);
- return -ENOENT;
- }
- ret = btrfs_iter_dir(root, ino, show_dir);
- if (ret < 0) {
- error("An error occurred while listing directory %s", path);
- return ret;
- }
- return 0;
-}
-
/*
* The fs layer closes and re-probes btrfs between readdir() calls (see
* fs_readdir() in fs/fs.c), freeing and reallocating fs_info, so root cannot
return btrfs_match_dir_item_name(root, path, name, name_len);
}
-int btrfs_iter_dir(struct btrfs_root *root, u64 ino,
- btrfs_iter_dir_callback_t callback)
-{
- struct btrfs_path path;
- struct btrfs_key key;
- int ret;
-
- btrfs_init_path(&path);
- key.objectid = ino;
- key.type = BTRFS_DIR_INDEX_KEY;
- key.offset = 0;
-
- ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
- if (ret < 0)
- return ret;
- /* Should not happen */
- if (ret == 0) {
- ret = -EUCLEAN;
- goto out;
- }
- if (path.slots[0] >= btrfs_header_nritems(path.nodes[0])) {
- ret = btrfs_next_leaf(root, &path);
- if (ret < 0)
- goto out;
- if (ret > 0) {
- ret = 0;
- goto out;
- }
- }
- do {
- struct btrfs_dir_item *di;
-
- btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
- if (key.objectid != ino || key.type != BTRFS_DIR_INDEX_KEY)
- break;
- di = btrfs_item_ptr(path.nodes[0], path.slots[0],
- struct btrfs_dir_item);
- if (verify_dir_item(root, path.nodes[0], di)) {
- ret = -EUCLEAN;
- goto out;
- }
- ret = callback(root, path.nodes[0], di);
- if (ret < 0)
- goto out;
- } while (!(ret = btrfs_next_item(root, &path)));
-
- if (ret > 0)
- ret = 0;
-out:
- btrfs_release_path(&path);
- return ret;
-}
-
/*
* btrfs_next_dir_entry() - read one directory entry at or after a cursor
*
- * Streaming counterpart to btrfs_iter_dir() for the fs-layer readdir, which
- * is re-entered once per entry: returns the first real entry whose
- * BTRFS_DIR_INDEX_KEY offset is >= *offset and advances *offset past it.
+ * Iterator for the fs-layer readdir, which is re-entered once per entry:
+ * returns the first real entry whose BTRFS_DIR_INDEX_KEY offset is
+ * >= *offset and advances *offset past it.
*
* @root, @ino: directory to read
* @offset: in/out cursor; DIR_INDEX offset to resume from
projects / thirdparty / u-boot.git / commitdiff
