1c1d7c514SDavid Sterba // SPDX-License-Identifier: GPL-2.0
207b30a49SStefan Behrens /*
307b30a49SStefan Behrens * Copyright (C) STRATO AG 2013. All rights reserved.
407b30a49SStefan Behrens */
5c1d7c514SDavid Sterba
607b30a49SStefan Behrens #include <linux/uuid.h>
707b30a49SStefan Behrens #include <asm/unaligned.h>
89b569ea0SJosef Bacik #include "messages.h"
907b30a49SStefan Behrens #include "ctree.h"
1007b30a49SStefan Behrens #include "transaction.h"
1107b30a49SStefan Behrens #include "disk-io.h"
1207b30a49SStefan Behrens #include "print-tree.h"
13c7f13d42SJosef Bacik #include "fs.h"
1407e81dc9SJosef Bacik #include "accessors.h"
15c7a03b52SJosef Bacik #include "uuid-tree.h"
1607b30a49SStefan Behrens
btrfs_uuid_to_key(u8 * uuid,u8 type,struct btrfs_key * key)1707b30a49SStefan Behrens static void btrfs_uuid_to_key(u8 *uuid, u8 type, struct btrfs_key *key)
1807b30a49SStefan Behrens {
1907b30a49SStefan Behrens key->type = type;
2007b30a49SStefan Behrens key->objectid = get_unaligned_le64(uuid);
2107b30a49SStefan Behrens key->offset = get_unaligned_le64(uuid + sizeof(u64));
2207b30a49SStefan Behrens }
2307b30a49SStefan Behrens
2407b30a49SStefan Behrens /* return -ENOENT for !found, < 0 for errors, or 0 if an item was found */
btrfs_uuid_tree_lookup(struct btrfs_root * uuid_root,u8 * uuid,u8 type,u64 subid)2507b30a49SStefan Behrens static int btrfs_uuid_tree_lookup(struct btrfs_root *uuid_root, u8 *uuid,
2607b30a49SStefan Behrens u8 type, u64 subid)
2707b30a49SStefan Behrens {
2807b30a49SStefan Behrens int ret;
2907b30a49SStefan Behrens struct btrfs_path *path = NULL;
3007b30a49SStefan Behrens struct extent_buffer *eb;
3107b30a49SStefan Behrens int slot;
3207b30a49SStefan Behrens u32 item_size;
3307b30a49SStefan Behrens unsigned long offset;
3407b30a49SStefan Behrens struct btrfs_key key;
3507b30a49SStefan Behrens
3607b30a49SStefan Behrens if (WARN_ON_ONCE(!uuid_root)) {
3707b30a49SStefan Behrens ret = -ENOENT;
3807b30a49SStefan Behrens goto out;
3907b30a49SStefan Behrens }
4007b30a49SStefan Behrens
4107b30a49SStefan Behrens path = btrfs_alloc_path();
4207b30a49SStefan Behrens if (!path) {
4307b30a49SStefan Behrens ret = -ENOMEM;
4407b30a49SStefan Behrens goto out;
4507b30a49SStefan Behrens }
4607b30a49SStefan Behrens
4707b30a49SStefan Behrens btrfs_uuid_to_key(uuid, type, &key);
4807b30a49SStefan Behrens ret = btrfs_search_slot(NULL, uuid_root, &key, path, 0, 0);
4907b30a49SStefan Behrens if (ret < 0) {
5007b30a49SStefan Behrens goto out;
5107b30a49SStefan Behrens } else if (ret > 0) {
5207b30a49SStefan Behrens ret = -ENOENT;
5307b30a49SStefan Behrens goto out;
5407b30a49SStefan Behrens }
5507b30a49SStefan Behrens
5607b30a49SStefan Behrens eb = path->nodes[0];
5707b30a49SStefan Behrens slot = path->slots[0];
583212fa14SJosef Bacik item_size = btrfs_item_size(eb, slot);
5907b30a49SStefan Behrens offset = btrfs_item_ptr_offset(eb, slot);
6007b30a49SStefan Behrens ret = -ENOENT;
6107b30a49SStefan Behrens
6207b30a49SStefan Behrens if (!IS_ALIGNED(item_size, sizeof(u64))) {
635d163e0eSJeff Mahoney btrfs_warn(uuid_root->fs_info,
645d163e0eSJeff Mahoney "uuid item with illegal size %lu!",
6507b30a49SStefan Behrens (unsigned long)item_size);
6607b30a49SStefan Behrens goto out;
6707b30a49SStefan Behrens }
6807b30a49SStefan Behrens while (item_size) {
6907b30a49SStefan Behrens __le64 data;
7007b30a49SStefan Behrens
7107b30a49SStefan Behrens read_extent_buffer(eb, &data, offset, sizeof(data));
7207b30a49SStefan Behrens if (le64_to_cpu(data) == subid) {
7307b30a49SStefan Behrens ret = 0;
7407b30a49SStefan Behrens break;
7507b30a49SStefan Behrens }
7607b30a49SStefan Behrens offset += sizeof(data);
7707b30a49SStefan Behrens item_size -= sizeof(data);
7807b30a49SStefan Behrens }
7907b30a49SStefan Behrens
8007b30a49SStefan Behrens out:
8107b30a49SStefan Behrens btrfs_free_path(path);
8207b30a49SStefan Behrens return ret;
8307b30a49SStefan Behrens }
8407b30a49SStefan Behrens
btrfs_uuid_tree_add(struct btrfs_trans_handle * trans,u8 * uuid,u8 type,u64 subid_cpu)85cdb345a8SLu Fengqi int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
8607b30a49SStefan Behrens u64 subid_cpu)
8707b30a49SStefan Behrens {
88cdb345a8SLu Fengqi struct btrfs_fs_info *fs_info = trans->fs_info;
896bccf3abSJeff Mahoney struct btrfs_root *uuid_root = fs_info->uuid_root;
9007b30a49SStefan Behrens int ret;
9107b30a49SStefan Behrens struct btrfs_path *path = NULL;
9207b30a49SStefan Behrens struct btrfs_key key;
9307b30a49SStefan Behrens struct extent_buffer *eb;
9407b30a49SStefan Behrens int slot;
9507b30a49SStefan Behrens unsigned long offset;
9607b30a49SStefan Behrens __le64 subid_le;
9707b30a49SStefan Behrens
9807b30a49SStefan Behrens ret = btrfs_uuid_tree_lookup(uuid_root, uuid, type, subid_cpu);
9907b30a49SStefan Behrens if (ret != -ENOENT)
10007b30a49SStefan Behrens return ret;
10107b30a49SStefan Behrens
10207b30a49SStefan Behrens if (WARN_ON_ONCE(!uuid_root)) {
10307b30a49SStefan Behrens ret = -EINVAL;
10407b30a49SStefan Behrens goto out;
10507b30a49SStefan Behrens }
10607b30a49SStefan Behrens
10707b30a49SStefan Behrens btrfs_uuid_to_key(uuid, type, &key);
10807b30a49SStefan Behrens
10907b30a49SStefan Behrens path = btrfs_alloc_path();
11007b30a49SStefan Behrens if (!path) {
11107b30a49SStefan Behrens ret = -ENOMEM;
11207b30a49SStefan Behrens goto out;
11307b30a49SStefan Behrens }
11407b30a49SStefan Behrens
11507b30a49SStefan Behrens ret = btrfs_insert_empty_item(trans, uuid_root, path, &key,
11607b30a49SStefan Behrens sizeof(subid_le));
11707b30a49SStefan Behrens if (ret >= 0) {
11807b30a49SStefan Behrens /* Add an item for the type for the first time */
11907b30a49SStefan Behrens eb = path->nodes[0];
12007b30a49SStefan Behrens slot = path->slots[0];
12107b30a49SStefan Behrens offset = btrfs_item_ptr_offset(eb, slot);
12207b30a49SStefan Behrens } else if (ret == -EEXIST) {
12307b30a49SStefan Behrens /*
12407b30a49SStefan Behrens * An item with that type already exists.
12507b30a49SStefan Behrens * Extend the item and store the new subid at the end.
12607b30a49SStefan Behrens */
127*d5e09e38SFilipe Manana btrfs_extend_item(trans, path, sizeof(subid_le));
12807b30a49SStefan Behrens eb = path->nodes[0];
12907b30a49SStefan Behrens slot = path->slots[0];
13007b30a49SStefan Behrens offset = btrfs_item_ptr_offset(eb, slot);
1313212fa14SJosef Bacik offset += btrfs_item_size(eb, slot) - sizeof(subid_le);
132e8baf7abSNathan Chancellor } else {
1336bccf3abSJeff Mahoney btrfs_warn(fs_info,
1345d163e0eSJeff Mahoney "insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",
135cc7c7714SDavid Sterba ret, key.objectid, key.offset, type);
13607b30a49SStefan Behrens goto out;
13707b30a49SStefan Behrens }
13807b30a49SStefan Behrens
13907b30a49SStefan Behrens ret = 0;
14007b30a49SStefan Behrens subid_le = cpu_to_le64(subid_cpu);
14107b30a49SStefan Behrens write_extent_buffer(eb, &subid_le, offset, sizeof(subid_le));
142*d5e09e38SFilipe Manana btrfs_mark_buffer_dirty(trans, eb);
14307b30a49SStefan Behrens
14407b30a49SStefan Behrens out:
14507b30a49SStefan Behrens btrfs_free_path(path);
14607b30a49SStefan Behrens return ret;
14707b30a49SStefan Behrens }
14807b30a49SStefan Behrens
btrfs_uuid_tree_remove(struct btrfs_trans_handle * trans,u8 * uuid,u8 type,u64 subid)149d1957791SLu Fengqi int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
15007b30a49SStefan Behrens u64 subid)
15107b30a49SStefan Behrens {
152d1957791SLu Fengqi struct btrfs_fs_info *fs_info = trans->fs_info;
1536bccf3abSJeff Mahoney struct btrfs_root *uuid_root = fs_info->uuid_root;
15407b30a49SStefan Behrens int ret;
15507b30a49SStefan Behrens struct btrfs_path *path = NULL;
15607b30a49SStefan Behrens struct btrfs_key key;
15707b30a49SStefan Behrens struct extent_buffer *eb;
15807b30a49SStefan Behrens int slot;
15907b30a49SStefan Behrens unsigned long offset;
16007b30a49SStefan Behrens u32 item_size;
16107b30a49SStefan Behrens unsigned long move_dst;
16207b30a49SStefan Behrens unsigned long move_src;
16307b30a49SStefan Behrens unsigned long move_len;
16407b30a49SStefan Behrens
16507b30a49SStefan Behrens if (WARN_ON_ONCE(!uuid_root)) {
16607b30a49SStefan Behrens ret = -EINVAL;
16707b30a49SStefan Behrens goto out;
16807b30a49SStefan Behrens }
16907b30a49SStefan Behrens
17007b30a49SStefan Behrens btrfs_uuid_to_key(uuid, type, &key);
17107b30a49SStefan Behrens
17207b30a49SStefan Behrens path = btrfs_alloc_path();
17307b30a49SStefan Behrens if (!path) {
17407b30a49SStefan Behrens ret = -ENOMEM;
17507b30a49SStefan Behrens goto out;
17607b30a49SStefan Behrens }
17707b30a49SStefan Behrens
17807b30a49SStefan Behrens ret = btrfs_search_slot(trans, uuid_root, &key, path, -1, 1);
17907b30a49SStefan Behrens if (ret < 0) {
1800b246afaSJeff Mahoney btrfs_warn(fs_info, "error %d while searching for uuid item!",
1810b246afaSJeff Mahoney ret);
18207b30a49SStefan Behrens goto out;
18307b30a49SStefan Behrens }
18407b30a49SStefan Behrens if (ret > 0) {
18507b30a49SStefan Behrens ret = -ENOENT;
18607b30a49SStefan Behrens goto out;
18707b30a49SStefan Behrens }
18807b30a49SStefan Behrens
18907b30a49SStefan Behrens eb = path->nodes[0];
19007b30a49SStefan Behrens slot = path->slots[0];
19107b30a49SStefan Behrens offset = btrfs_item_ptr_offset(eb, slot);
1923212fa14SJosef Bacik item_size = btrfs_item_size(eb, slot);
19307b30a49SStefan Behrens if (!IS_ALIGNED(item_size, sizeof(u64))) {
1940b246afaSJeff Mahoney btrfs_warn(fs_info, "uuid item with illegal size %lu!",
19507b30a49SStefan Behrens (unsigned long)item_size);
19607b30a49SStefan Behrens ret = -ENOENT;
19707b30a49SStefan Behrens goto out;
19807b30a49SStefan Behrens }
19907b30a49SStefan Behrens while (item_size) {
20007b30a49SStefan Behrens __le64 read_subid;
20107b30a49SStefan Behrens
20207b30a49SStefan Behrens read_extent_buffer(eb, &read_subid, offset, sizeof(read_subid));
20307b30a49SStefan Behrens if (le64_to_cpu(read_subid) == subid)
20407b30a49SStefan Behrens break;
20507b30a49SStefan Behrens offset += sizeof(read_subid);
20607b30a49SStefan Behrens item_size -= sizeof(read_subid);
20707b30a49SStefan Behrens }
20807b30a49SStefan Behrens
20907b30a49SStefan Behrens if (!item_size) {
21007b30a49SStefan Behrens ret = -ENOENT;
21107b30a49SStefan Behrens goto out;
21207b30a49SStefan Behrens }
21307b30a49SStefan Behrens
2143212fa14SJosef Bacik item_size = btrfs_item_size(eb, slot);
21507b30a49SStefan Behrens if (item_size == sizeof(subid)) {
21607b30a49SStefan Behrens ret = btrfs_del_item(trans, uuid_root, path);
21707b30a49SStefan Behrens goto out;
21807b30a49SStefan Behrens }
21907b30a49SStefan Behrens
22007b30a49SStefan Behrens move_dst = offset;
22107b30a49SStefan Behrens move_src = offset + sizeof(subid);
22207b30a49SStefan Behrens move_len = item_size - (move_src - btrfs_item_ptr_offset(eb, slot));
22307b30a49SStefan Behrens memmove_extent_buffer(eb, move_dst, move_src, move_len);
224*d5e09e38SFilipe Manana btrfs_truncate_item(trans, path, item_size - sizeof(subid), 1);
22507b30a49SStefan Behrens
22607b30a49SStefan Behrens out:
22707b30a49SStefan Behrens btrfs_free_path(path);
22807b30a49SStefan Behrens return ret;
22907b30a49SStefan Behrens }
23070f80175SStefan Behrens
btrfs_uuid_iter_rem(struct btrfs_root * uuid_root,u8 * uuid,u8 type,u64 subid)23170f80175SStefan Behrens static int btrfs_uuid_iter_rem(struct btrfs_root *uuid_root, u8 *uuid, u8 type,
23270f80175SStefan Behrens u64 subid)
23370f80175SStefan Behrens {
23470f80175SStefan Behrens struct btrfs_trans_handle *trans;
23570f80175SStefan Behrens int ret;
23670f80175SStefan Behrens
23770f80175SStefan Behrens /* 1 - for the uuid item */
23870f80175SStefan Behrens trans = btrfs_start_transaction(uuid_root, 1);
23970f80175SStefan Behrens if (IS_ERR(trans)) {
24070f80175SStefan Behrens ret = PTR_ERR(trans);
24170f80175SStefan Behrens goto out;
24270f80175SStefan Behrens }
24370f80175SStefan Behrens
244d1957791SLu Fengqi ret = btrfs_uuid_tree_remove(trans, uuid, type, subid);
2453a45bb20SJeff Mahoney btrfs_end_transaction(trans);
24670f80175SStefan Behrens
24770f80175SStefan Behrens out:
24870f80175SStefan Behrens return ret;
24970f80175SStefan Behrens }
25070f80175SStefan Behrens
251560b7a4aSNikolay Borisov /*
252560b7a4aSNikolay Borisov * Check if there's an matching subvolume for given UUID
253560b7a4aSNikolay Borisov *
254560b7a4aSNikolay Borisov * Return:
255560b7a4aSNikolay Borisov * 0 check succeeded, the entry is not outdated
256560b7a4aSNikolay Borisov * > 0 if the check failed, the caller should remove the entry
257560b7a4aSNikolay Borisov * < 0 if an error occurred
258560b7a4aSNikolay Borisov */
btrfs_check_uuid_tree_entry(struct btrfs_fs_info * fs_info,u8 * uuid,u8 type,u64 subvolid)259560b7a4aSNikolay Borisov static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
260560b7a4aSNikolay Borisov u8 *uuid, u8 type, u64 subvolid)
261560b7a4aSNikolay Borisov {
262560b7a4aSNikolay Borisov int ret = 0;
263560b7a4aSNikolay Borisov struct btrfs_root *subvol_root;
264560b7a4aSNikolay Borisov
265560b7a4aSNikolay Borisov if (type != BTRFS_UUID_KEY_SUBVOL &&
266560b7a4aSNikolay Borisov type != BTRFS_UUID_KEY_RECEIVED_SUBVOL)
267560b7a4aSNikolay Borisov goto out;
268560b7a4aSNikolay Borisov
26956e9357aSDavid Sterba subvol_root = btrfs_get_fs_root(fs_info, subvolid, true);
270560b7a4aSNikolay Borisov if (IS_ERR(subvol_root)) {
271560b7a4aSNikolay Borisov ret = PTR_ERR(subvol_root);
272560b7a4aSNikolay Borisov if (ret == -ENOENT)
273560b7a4aSNikolay Borisov ret = 1;
274560b7a4aSNikolay Borisov goto out;
275560b7a4aSNikolay Borisov }
276560b7a4aSNikolay Borisov
277560b7a4aSNikolay Borisov switch (type) {
278560b7a4aSNikolay Borisov case BTRFS_UUID_KEY_SUBVOL:
279560b7a4aSNikolay Borisov if (memcmp(uuid, subvol_root->root_item.uuid, BTRFS_UUID_SIZE))
280560b7a4aSNikolay Borisov ret = 1;
281560b7a4aSNikolay Borisov break;
282560b7a4aSNikolay Borisov case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
283560b7a4aSNikolay Borisov if (memcmp(uuid, subvol_root->root_item.received_uuid,
284560b7a4aSNikolay Borisov BTRFS_UUID_SIZE))
285560b7a4aSNikolay Borisov ret = 1;
286560b7a4aSNikolay Borisov break;
287560b7a4aSNikolay Borisov }
288560b7a4aSNikolay Borisov btrfs_put_root(subvol_root);
289560b7a4aSNikolay Borisov out:
290560b7a4aSNikolay Borisov return ret;
291560b7a4aSNikolay Borisov }
292560b7a4aSNikolay Borisov
btrfs_uuid_tree_iterate(struct btrfs_fs_info * fs_info)293560b7a4aSNikolay Borisov int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info)
29470f80175SStefan Behrens {
29570f80175SStefan Behrens struct btrfs_root *root = fs_info->uuid_root;
29670f80175SStefan Behrens struct btrfs_key key;
29770f80175SStefan Behrens struct btrfs_path *path;
29870f80175SStefan Behrens int ret = 0;
29970f80175SStefan Behrens struct extent_buffer *leaf;
30070f80175SStefan Behrens int slot;
30170f80175SStefan Behrens u32 item_size;
30270f80175SStefan Behrens unsigned long offset;
30370f80175SStefan Behrens
30470f80175SStefan Behrens path = btrfs_alloc_path();
30570f80175SStefan Behrens if (!path) {
30670f80175SStefan Behrens ret = -ENOMEM;
30770f80175SStefan Behrens goto out;
30870f80175SStefan Behrens }
30970f80175SStefan Behrens
31070f80175SStefan Behrens key.objectid = 0;
31170f80175SStefan Behrens key.type = 0;
31270f80175SStefan Behrens key.offset = 0;
31370f80175SStefan Behrens
31470f80175SStefan Behrens again_search_slot:
3157c829b72SAnand Jain ret = btrfs_search_forward(root, &key, path, BTRFS_OLDEST_GENERATION);
31670f80175SStefan Behrens if (ret) {
31770f80175SStefan Behrens if (ret > 0)
31870f80175SStefan Behrens ret = 0;
31970f80175SStefan Behrens goto out;
32070f80175SStefan Behrens }
32170f80175SStefan Behrens
32270f80175SStefan Behrens while (1) {
323c94bec2cSJosef Bacik if (btrfs_fs_closing(fs_info)) {
324c94bec2cSJosef Bacik ret = -EINTR;
325c94bec2cSJosef Bacik goto out;
326c94bec2cSJosef Bacik }
32770f80175SStefan Behrens cond_resched();
32870f80175SStefan Behrens leaf = path->nodes[0];
32970f80175SStefan Behrens slot = path->slots[0];
33070f80175SStefan Behrens btrfs_item_key_to_cpu(leaf, &key, slot);
33170f80175SStefan Behrens
33270f80175SStefan Behrens if (key.type != BTRFS_UUID_KEY_SUBVOL &&
33370f80175SStefan Behrens key.type != BTRFS_UUID_KEY_RECEIVED_SUBVOL)
33470f80175SStefan Behrens goto skip;
33570f80175SStefan Behrens
33670f80175SStefan Behrens offset = btrfs_item_ptr_offset(leaf, slot);
3373212fa14SJosef Bacik item_size = btrfs_item_size(leaf, slot);
33870f80175SStefan Behrens if (!IS_ALIGNED(item_size, sizeof(u64))) {
3395d163e0eSJeff Mahoney btrfs_warn(fs_info,
3405d163e0eSJeff Mahoney "uuid item with illegal size %lu!",
34170f80175SStefan Behrens (unsigned long)item_size);
34270f80175SStefan Behrens goto skip;
34370f80175SStefan Behrens }
34470f80175SStefan Behrens while (item_size) {
34570f80175SStefan Behrens u8 uuid[BTRFS_UUID_SIZE];
34670f80175SStefan Behrens __le64 subid_le;
34770f80175SStefan Behrens u64 subid_cpu;
34870f80175SStefan Behrens
34970f80175SStefan Behrens put_unaligned_le64(key.objectid, uuid);
35070f80175SStefan Behrens put_unaligned_le64(key.offset, uuid + sizeof(u64));
35170f80175SStefan Behrens read_extent_buffer(leaf, &subid_le, offset,
35270f80175SStefan Behrens sizeof(subid_le));
35370f80175SStefan Behrens subid_cpu = le64_to_cpu(subid_le);
354560b7a4aSNikolay Borisov ret = btrfs_check_uuid_tree_entry(fs_info, uuid,
355560b7a4aSNikolay Borisov key.type, subid_cpu);
35670f80175SStefan Behrens if (ret < 0)
35770f80175SStefan Behrens goto out;
35870f80175SStefan Behrens if (ret > 0) {
35970f80175SStefan Behrens btrfs_release_path(path);
36070f80175SStefan Behrens ret = btrfs_uuid_iter_rem(root, uuid, key.type,
36170f80175SStefan Behrens subid_cpu);
36270f80175SStefan Behrens if (ret == 0) {
36370f80175SStefan Behrens /*
36470f80175SStefan Behrens * this might look inefficient, but the
36570f80175SStefan Behrens * justification is that it is an
36670f80175SStefan Behrens * exception that check_func returns 1,
36770f80175SStefan Behrens * and that in the regular case only one
36870f80175SStefan Behrens * entry per UUID exists.
36970f80175SStefan Behrens */
37070f80175SStefan Behrens goto again_search_slot;
37170f80175SStefan Behrens }
37270f80175SStefan Behrens if (ret < 0 && ret != -ENOENT)
37370f80175SStefan Behrens goto out;
374714cd3e8SJosef Bacik key.offset++;
375714cd3e8SJosef Bacik goto again_search_slot;
37670f80175SStefan Behrens }
37770f80175SStefan Behrens item_size -= sizeof(subid_le);
37870f80175SStefan Behrens offset += sizeof(subid_le);
37970f80175SStefan Behrens }
38070f80175SStefan Behrens
38170f80175SStefan Behrens skip:
38270f80175SStefan Behrens ret = btrfs_next_item(root, path);
38370f80175SStefan Behrens if (ret == 0)
38470f80175SStefan Behrens continue;
38570f80175SStefan Behrens else if (ret > 0)
38670f80175SStefan Behrens ret = 0;
38770f80175SStefan Behrens break;
38870f80175SStefan Behrens }
38970f80175SStefan Behrens
39070f80175SStefan Behrens out:
39170f80175SStefan Behrens btrfs_free_path(path);
39273ba39abSPan Bian return ret;
39370f80175SStefan Behrens }
394