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Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c199
1 files changed, 70 insertions, 129 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index cc8aa4a04348..ae1742a35e76 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -739,7 +739,7 @@ static bool is_same_device(struct btrfs_device *device, const char *new_path)
{
struct path old = { .mnt = NULL, .dentry = NULL };
struct path new = { .mnt = NULL, .dentry = NULL };
- char *old_path = NULL;
+ char AUTO_KFREE(old_path);
bool is_same = false;
int ret;
@@ -765,7 +765,6 @@ static bool is_same_device(struct btrfs_device *device, const char *new_path)
if (path_equal(&old, &new))
is_same = true;
out:
- kfree(old_path);
path_put(&old);
path_put(&new);
return is_same;
@@ -1681,7 +1680,7 @@ static int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
struct btrfs_root *root = fs_info->dev_root;
struct btrfs_key key;
struct btrfs_dev_extent *dev_extent;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
u64 search_start;
u64 hole_size;
u64 max_hole_start;
@@ -1711,8 +1710,8 @@ again:
}
path->reada = READA_FORWARD;
- path->search_commit_root = 1;
- path->skip_locking = 1;
+ path->search_commit_root = true;
+ path->skip_locking = true;
key.objectid = device->devid;
key.type = BTRFS_DEV_EXTENT_KEY;
@@ -1812,7 +1811,6 @@ next:
"max_hole_start=%llu max_hole_size=%llu search_end=%llu",
max_hole_start, max_hole_size, search_end);
out:
- btrfs_free_path(path);
*start = max_hole_start;
if (len)
*len = max_hole_size;
@@ -1826,7 +1824,7 @@ static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_root *root = fs_info->dev_root;
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct btrfs_key found_key;
struct extent_buffer *leaf = NULL;
@@ -1845,7 +1843,7 @@ again:
ret = btrfs_previous_item(root, path, key.objectid,
BTRFS_DEV_EXTENT_KEY);
if (ret)
- goto out;
+ return ret;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
extent = btrfs_item_ptr(leaf, path->slots[0],
@@ -1860,7 +1858,7 @@ again:
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
} else {
- goto out;
+ return ret;
}
*dev_extent_len = btrfs_dev_extent_length(leaf, extent);
@@ -1868,8 +1866,6 @@ again:
ret = btrfs_del_item(trans, root, path);
if (ret == 0)
set_bit(BTRFS_TRANS_HAVE_FREE_BGS, &trans->transaction->flags);
-out:
- btrfs_free_path(path);
return ret;
}
@@ -1897,7 +1893,7 @@ static noinline int find_next_devid(struct btrfs_fs_info *fs_info,
int ret;
struct btrfs_key key;
struct btrfs_key found_key;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
path = btrfs_alloc_path();
if (!path)
@@ -1909,13 +1905,12 @@ static noinline int find_next_devid(struct btrfs_fs_info *fs_info,
ret = btrfs_search_slot(NULL, fs_info->chunk_root, &key, path, 0, 0);
if (ret < 0)
- goto error;
+ return ret;
if (unlikely(ret == 0)) {
/* Corruption */
btrfs_err(fs_info, "corrupted chunk tree devid -1 matched");
- ret = -EUCLEAN;
- goto error;
+ return -EUCLEAN;
}
ret = btrfs_previous_item(fs_info->chunk_root, path,
@@ -1928,10 +1923,7 @@ static noinline int find_next_devid(struct btrfs_fs_info *fs_info,
path->slots[0]);
*devid_ret = found_key.offset + 1;
}
- ret = 0;
-error:
- btrfs_free_path(path);
- return ret;
+ return 0;
}
/*
@@ -1942,7 +1934,7 @@ static int btrfs_add_dev_item(struct btrfs_trans_handle *trans,
struct btrfs_device *device)
{
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_dev_item *dev_item;
struct extent_buffer *leaf;
struct btrfs_key key;
@@ -1961,7 +1953,7 @@ static int btrfs_add_dev_item(struct btrfs_trans_handle *trans,
&key, sizeof(*dev_item));
btrfs_trans_release_chunk_metadata(trans);
if (ret)
- goto out;
+ return ret;
leaf = path->nodes[0];
dev_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_item);
@@ -1987,10 +1979,7 @@ static int btrfs_add_dev_item(struct btrfs_trans_handle *trans,
write_extent_buffer(leaf, trans->fs_info->fs_devices->metadata_uuid,
ptr, BTRFS_FSID_SIZE);
- ret = 0;
-out:
- btrfs_free_path(path);
- return ret;
+ return 0;
}
/*
@@ -2014,7 +2003,7 @@ static int btrfs_rm_dev_item(struct btrfs_trans_handle *trans,
{
struct btrfs_root *root = device->fs_info->chunk_root;
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
path = btrfs_alloc_path();
@@ -2028,16 +2017,12 @@ static int btrfs_rm_dev_item(struct btrfs_trans_handle *trans,
btrfs_reserve_chunk_metadata(trans, false);
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
btrfs_trans_release_chunk_metadata(trans);
- if (ret) {
- if (ret > 0)
- ret = -ENOENT;
- goto out;
- }
+ if (ret > 0)
+ return -ENOENT;
+ if (ret < 0)
+ return ret;
- ret = btrfs_del_item(trans, root, path);
-out:
- btrfs_free_path(path);
- return ret;
+ return btrfs_del_item(trans, root, path);
}
/*
@@ -2623,7 +2608,7 @@ static int btrfs_finish_sprout(struct btrfs_trans_handle *trans)
BTRFS_DEV_LOOKUP_ARGS(args);
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *root = fs_info->chunk_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct extent_buffer *leaf;
struct btrfs_dev_item *dev_item;
struct btrfs_device *device;
@@ -2645,7 +2630,7 @@ static int btrfs_finish_sprout(struct btrfs_trans_handle *trans)
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
btrfs_trans_release_chunk_metadata(trans);
if (ret < 0)
- goto error;
+ return ret;
leaf = path->nodes[0];
next_slot:
@@ -2654,7 +2639,7 @@ next_slot:
if (ret > 0)
break;
if (ret < 0)
- goto error;
+ return ret;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
btrfs_release_path(path);
@@ -2685,10 +2670,7 @@ next_slot:
path->slots[0]++;
goto next_slot;
}
- ret = 0;
-error:
- btrfs_free_path(path);
- return ret;
+ return 0;
}
int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path)
@@ -2943,7 +2925,7 @@ static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device)
{
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_root *root = device->fs_info->chunk_root;
struct btrfs_dev_item *dev_item;
struct extent_buffer *leaf;
@@ -2959,12 +2941,10 @@ static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
if (ret < 0)
- goto out;
+ return ret;
- if (ret > 0) {
- ret = -ENOENT;
- goto out;
- }
+ if (ret > 0)
+ return -ENOENT;
leaf = path->nodes[0];
dev_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_item);
@@ -2978,8 +2958,6 @@ static noinline int btrfs_update_device(struct btrfs_trans_handle *trans,
btrfs_device_get_disk_total_bytes(device));
btrfs_set_device_bytes_used(leaf, dev_item,
btrfs_device_get_bytes_used(device));
-out:
- btrfs_free_path(path);
return ret;
}
@@ -3032,7 +3010,7 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset)
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *root = fs_info->chunk_root;
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
path = btrfs_alloc_path();
@@ -3045,23 +3023,21 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset)
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
- goto out;
- else if (unlikely(ret > 0)) { /* Logic error or corruption */
+ return ret;
+ if (unlikely(ret > 0)) {
+ /* Logic error or corruption */
btrfs_err(fs_info, "failed to lookup chunk %llu when freeing",
chunk_offset);
btrfs_abort_transaction(trans, -ENOENT);
- ret = -EUCLEAN;
- goto out;
+ return -EUCLEAN;
}
ret = btrfs_del_item(trans, root, path);
if (unlikely(ret < 0)) {
btrfs_err(fs_info, "failed to delete chunk %llu item", chunk_offset);
btrfs_abort_transaction(trans, ret);
- goto out;
+ return ret;
}
-out:
- btrfs_free_path(path);
return ret;
}
@@ -3498,7 +3474,7 @@ int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset,
static int btrfs_relocate_sys_chunks(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *chunk_root = fs_info->chunk_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct extent_buffer *leaf;
struct btrfs_chunk *chunk;
struct btrfs_key key;
@@ -3522,7 +3498,7 @@ again:
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
if (ret < 0) {
mutex_unlock(&fs_info->reclaim_bgs_lock);
- goto error;
+ return ret;
}
if (unlikely(ret == 0)) {
/*
@@ -3532,9 +3508,8 @@ again:
* offset (one less than the previous one, wrong
* alignment and size).
*/
- ret = -EUCLEAN;
mutex_unlock(&fs_info->reclaim_bgs_lock);
- goto error;
+ return -EUCLEAN;
}
ret = btrfs_previous_item(chunk_root, path, key.objectid,
@@ -3542,7 +3517,7 @@ again:
if (ret)
mutex_unlock(&fs_info->reclaim_bgs_lock);
if (ret < 0)
- goto error;
+ return ret;
if (ret > 0)
break;
@@ -3576,8 +3551,6 @@ again:
} else if (WARN_ON(failed && retried)) {
ret = -ENOSPC;
}
-error:
- btrfs_free_path(path);
return ret;
}
@@ -4078,7 +4051,7 @@ static int __btrfs_balance(struct btrfs_fs_info *fs_info)
struct btrfs_root *chunk_root = fs_info->chunk_root;
u64 chunk_type;
struct btrfs_chunk *chunk;
- struct btrfs_path *path = NULL;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct btrfs_key found_key;
struct extent_buffer *leaf;
@@ -4249,7 +4222,6 @@ loop:
goto again;
}
error:
- btrfs_free_path(path);
if (enospc_errors) {
btrfs_info(fs_info, "%d enospc errors during balance",
enospc_errors);
@@ -4407,7 +4379,7 @@ static void describe_balance_start_or_resume(struct btrfs_fs_info *fs_info)
{
u32 size_buf = 1024;
char tmp_buf[192] = {'\0'};
- char *buf;
+ char AUTO_KFREE(buf);
char *bp;
u32 size_bp = size_buf;
int ret;
@@ -4455,8 +4427,6 @@ out_overflow:
btrfs_info(fs_info, "balance: %s %s",
(bctl->flags & BTRFS_BALANCE_RESUME) ?
"resume" : "start", buf);
-
- kfree(buf);
}
/*
@@ -4706,7 +4676,7 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
struct btrfs_balance_control *bctl;
struct btrfs_balance_item *item;
struct btrfs_disk_balance_args disk_bargs;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct extent_buffer *leaf;
struct btrfs_key key;
int ret;
@@ -4721,17 +4691,14 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
if (ret < 0)
- goto out;
+ return ret;
if (ret > 0) { /* ret = -ENOENT; */
- ret = 0;
- goto out;
+ return 0;
}
bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
- if (!bctl) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!bctl)
+ return -ENOMEM;
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
@@ -4768,8 +4735,6 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
fs_info->balance_ctl = bctl;
spin_unlock(&fs_info->balance_lock);
mutex_unlock(&fs_info->balance_mutex);
-out:
- btrfs_free_path(path);
return ret;
}
@@ -5590,9 +5555,8 @@ struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *info = trans->fs_info;
struct btrfs_fs_devices *fs_devices = info->fs_devices;
- struct btrfs_device_info *devices_info = NULL;
+ struct btrfs_device_info AUTO_KFREE(devices_info);
struct alloc_chunk_ctl ctl;
- struct btrfs_block_group *block_group;
int ret;
lockdep_assert_held(&info->chunk_mutex);
@@ -5625,22 +5589,14 @@ struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
return ERR_PTR(-ENOMEM);
ret = gather_device_info(fs_devices, &ctl, devices_info);
- if (ret < 0) {
- block_group = ERR_PTR(ret);
- goto out;
- }
+ if (ret < 0)
+ return ERR_PTR(ret);
ret = decide_stripe_size(fs_devices, &ctl, devices_info);
- if (ret < 0) {
- block_group = ERR_PTR(ret);
- goto out;
- }
-
- block_group = create_chunk(trans, &ctl, devices_info);
+ if (ret < 0)
+ return ERR_PTR(ret);
-out:
- kfree(devices_info);
- return block_group;
+ return create_chunk(trans, &ctl, devices_info);
}
/*
@@ -6073,12 +6029,7 @@ struct btrfs_io_context *alloc_btrfs_io_context(struct btrfs_fs_info *fs_info,
{
struct btrfs_io_context *bioc;
- bioc = kzalloc(
- /* The size of btrfs_io_context */
- sizeof(struct btrfs_io_context) +
- /* Plus the variable array for the stripes */
- sizeof(struct btrfs_io_stripe) * (total_stripes),
- GFP_NOFS);
+ bioc = kzalloc(struct_size(bioc, stripes, total_stripes), GFP_NOFS);
if (!bioc)
return NULL;
@@ -6804,6 +6755,8 @@ static bool dev_args_match_fs_devices(const struct btrfs_dev_lookup_args *args,
static bool dev_args_match_device(const struct btrfs_dev_lookup_args *args,
const struct btrfs_device *device)
{
+ if (args->devt)
+ return device->devt == args->devt;
if (args->missing) {
if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state) &&
!device->bdev)
@@ -7452,7 +7405,7 @@ static void readahead_tree_node_children(struct extent_buffer *node)
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root = fs_info->chunk_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct extent_buffer *leaf;
struct btrfs_key key;
struct btrfs_key found_key;
@@ -7491,7 +7444,7 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
* chunk tree, to keep it simple, just skip locking on the chunk tree.
*/
ASSERT(!test_bit(BTRFS_FS_OPEN, &fs_info->flags));
- path->skip_locking = 1;
+ path->skip_locking = true;
/*
* Read all device items, and then all the chunk items. All
@@ -7569,8 +7522,6 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
ret = 0;
error:
mutex_unlock(&uuid_mutex);
-
- btrfs_free_path(path);
return ret;
}
@@ -7670,7 +7621,7 @@ int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices, *seed_devs;
struct btrfs_device *device;
- struct btrfs_path *path = NULL;
+ BTRFS_PATH_AUTO_FREE(path);
int ret = 0;
path = btrfs_alloc_path();
@@ -7692,8 +7643,6 @@ int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info)
}
out:
mutex_unlock(&fs_devices->device_list_mutex);
-
- btrfs_free_path(path);
return ret;
}
@@ -7702,7 +7651,7 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *dev_root = fs_info->dev_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct extent_buffer *eb;
struct btrfs_dev_stats_item *ptr;
@@ -7721,7 +7670,7 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
btrfs_warn(fs_info,
"error %d while searching for dev_stats item for device %s",
ret, btrfs_dev_name(device));
- goto out;
+ return ret;
}
if (ret == 0 &&
@@ -7732,7 +7681,7 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
btrfs_warn(fs_info,
"delete too small dev_stats item for device %s failed %d",
btrfs_dev_name(device), ret);
- goto out;
+ return ret;
}
ret = 1;
}
@@ -7746,7 +7695,7 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
btrfs_warn(fs_info,
"insert dev_stats item for device %s failed %d",
btrfs_dev_name(device), ret);
- goto out;
+ return ret;
}
}
@@ -7755,8 +7704,6 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
for (i = 0; i < BTRFS_DEV_STAT_VALUES_MAX; i++)
btrfs_set_dev_stats_value(eb, ptr, i,
btrfs_dev_stat_read(device, i));
-out:
- btrfs_free_path(path);
return ret;
}
@@ -8046,7 +7993,7 @@ out:
*/
int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
{
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_root *root = fs_info->dev_root;
struct btrfs_key key;
u64 prev_devid = 0;
@@ -8077,17 +8024,15 @@ int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
path->reada = READA_FORWARD;
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
- goto out;
+ return ret;
if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
- goto out;
+ return ret;
/* No dev extents at all? Not good */
- if (unlikely(ret > 0)) {
- ret = -EUCLEAN;
- goto out;
- }
+ if (unlikely(ret > 0))
+ return -EUCLEAN;
}
while (1) {
struct extent_buffer *leaf = path->nodes[0];
@@ -8113,20 +8058,19 @@ int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
btrfs_err(fs_info,
"dev extent devid %llu physical offset %llu overlap with previous dev extent end %llu",
devid, physical_offset, prev_dev_ext_end);
- ret = -EUCLEAN;
- goto out;
+ return -EUCLEAN;
}
ret = verify_one_dev_extent(fs_info, chunk_offset, devid,
physical_offset, physical_len);
if (ret < 0)
- goto out;
+ return ret;
prev_devid = devid;
prev_dev_ext_end = physical_offset + physical_len;
ret = btrfs_next_item(root, path);
if (ret < 0)
- goto out;
+ return ret;
if (ret > 0) {
ret = 0;
break;
@@ -8134,10 +8078,7 @@ int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
}
/* Ensure all chunks have corresponding dev extents */
- ret = verify_chunk_dev_extent_mapping(fs_info);
-out:
- btrfs_free_path(path);
- return ret;
+ return verify_chunk_dev_extent_mapping(fs_info);
}
/*
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 13:54:50 +0000