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path: root/fs/btrfs/qgroup.c
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Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r--fs/btrfs/qgroup.c182
1 files changed, 81 insertions, 101 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 31ad8580322a..9e2b53e90dcb 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -660,7 +660,7 @@ static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src,
{
int ret;
struct btrfs_root *quota_root = trans->fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
path = btrfs_alloc_path();
@@ -672,7 +672,6 @@ static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src,
key.offset = dst;
ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0);
- btrfs_free_path(path);
return ret;
}
@@ -681,7 +680,7 @@ static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src,
{
int ret;
struct btrfs_root *quota_root = trans->fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
path = btrfs_alloc_path();
@@ -694,24 +693,19 @@ static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src,
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
if (ret < 0)
- goto out;
+ return ret;
- if (ret > 0) {
- ret = -ENOENT;
- goto out;
- }
+ if (ret > 0)
+ return -ENOENT;
- ret = btrfs_del_item(trans, quota_root, path);
-out:
- btrfs_free_path(path);
- return ret;
+ return btrfs_del_item(trans, quota_root, path);
}
static int add_qgroup_item(struct btrfs_trans_handle *trans,
struct btrfs_root *quota_root, u64 qgroupid)
{
int ret;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_qgroup_info_item *qgroup_info;
struct btrfs_qgroup_limit_item *qgroup_limit;
struct extent_buffer *leaf;
@@ -737,7 +731,7 @@ static int add_qgroup_item(struct btrfs_trans_handle *trans,
ret = btrfs_insert_empty_item(trans, quota_root, path, &key,
sizeof(*qgroup_info));
if (ret && ret != -EEXIST)
- goto out;
+ return ret;
leaf = path->nodes[0];
qgroup_info = btrfs_item_ptr(leaf, path->slots[0],
@@ -754,7 +748,7 @@ static int add_qgroup_item(struct btrfs_trans_handle *trans,
ret = btrfs_insert_empty_item(trans, quota_root, path, &key,
sizeof(*qgroup_limit));
if (ret && ret != -EEXIST)
- goto out;
+ return ret;
leaf = path->nodes[0];
qgroup_limit = btrfs_item_ptr(leaf, path->slots[0],
@@ -765,17 +759,14 @@ static int add_qgroup_item(struct btrfs_trans_handle *trans,
btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0);
btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0);
- ret = 0;
-out:
- btrfs_free_path(path);
- return ret;
+ return 0;
}
static int del_qgroup_item(struct btrfs_trans_handle *trans, u64 qgroupid)
{
int ret;
struct btrfs_root *quota_root = trans->fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
path = btrfs_alloc_path();
@@ -787,33 +778,27 @@ static int del_qgroup_item(struct btrfs_trans_handle *trans, u64 qgroupid)
key.offset = qgroupid;
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
if (ret < 0)
- goto out;
+ return ret;
- if (ret > 0) {
- ret = -ENOENT;
- goto out;
- }
+ if (ret > 0)
+ return -ENOENT;
ret = btrfs_del_item(trans, quota_root, path);
if (ret)
- goto out;
+ return ret;
btrfs_release_path(path);
key.type = BTRFS_QGROUP_LIMIT_KEY;
ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1);
if (ret < 0)
- goto out;
+ return ret;
- if (ret > 0) {
- ret = -ENOENT;
- goto out;
- }
+ if (ret > 0)
+ return -ENOENT;
ret = btrfs_del_item(trans, quota_root, path);
-out:
- btrfs_free_path(path);
return ret;
}
@@ -821,7 +806,7 @@ static int update_qgroup_limit_item(struct btrfs_trans_handle *trans,
struct btrfs_qgroup *qgroup)
{
struct btrfs_root *quota_root = trans->fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct extent_buffer *l;
struct btrfs_qgroup_limit_item *qgroup_limit;
@@ -841,7 +826,7 @@ static int update_qgroup_limit_item(struct btrfs_trans_handle *trans,
ret = -ENOENT;
if (ret)
- goto out;
+ return ret;
l = path->nodes[0];
slot = path->slots[0];
@@ -851,8 +836,7 @@ static int update_qgroup_limit_item(struct btrfs_trans_handle *trans,
btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, qgroup->max_excl);
btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, qgroup->rsv_rfer);
btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, qgroup->rsv_excl);
-out:
- btrfs_free_path(path);
+
return ret;
}
@@ -861,7 +845,7 @@ static int update_qgroup_info_item(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *quota_root = fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct extent_buffer *l;
struct btrfs_qgroup_info_item *qgroup_info;
@@ -884,7 +868,7 @@ static int update_qgroup_info_item(struct btrfs_trans_handle *trans,
ret = -ENOENT;
if (ret)
- goto out;
+ return ret;
l = path->nodes[0];
slot = path->slots[0];
@@ -894,8 +878,7 @@ static int update_qgroup_info_item(struct btrfs_trans_handle *trans,
btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr);
btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl);
btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr);
-out:
- btrfs_free_path(path);
+
return ret;
}
@@ -903,7 +886,7 @@ static int update_qgroup_status_item(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *quota_root = fs_info->quota_root;
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct extent_buffer *l;
struct btrfs_qgroup_status_item *ptr;
@@ -923,7 +906,7 @@ static int update_qgroup_status_item(struct btrfs_trans_handle *trans)
ret = -ENOENT;
if (ret)
- goto out;
+ return ret;
l = path->nodes[0];
slot = path->slots[0];
@@ -933,8 +916,7 @@ static int update_qgroup_status_item(struct btrfs_trans_handle *trans)
btrfs_set_qgroup_status_generation(l, ptr, trans->transid);
btrfs_set_qgroup_status_rescan(l, ptr,
fs_info->qgroup_rescan_progress.objectid);
-out:
- btrfs_free_path(path);
+
return ret;
}
@@ -944,7 +926,7 @@ out:
static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
- struct btrfs_path *path;
+ BTRFS_PATH_AUTO_FREE(path);
struct btrfs_key key;
struct extent_buffer *leaf = NULL;
int ret;
@@ -961,7 +943,7 @@ static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
while (1) {
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
- goto out;
+ return ret;
leaf = path->nodes[0];
nr = btrfs_header_nritems(leaf);
if (!nr)
@@ -974,14 +956,12 @@ static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans,
path->slots[0] = 0;
ret = btrfs_del_items(trans, root, path, 0, nr);
if (ret)
- goto out;
+ return ret;
btrfs_release_path(path);
}
- ret = 0;
-out:
- btrfs_free_path(path);
- return ret;
+
+ return 0;
}
int btrfs_quota_enable(struct btrfs_fs_info *fs_info,
@@ -1263,7 +1243,14 @@ out:
btrfs_end_transaction(trans);
else if (trans)
ret = btrfs_end_transaction(trans);
- kfree(prealloc);
+
+ /*
+ * At this point we either failed at allocating prealloc, or we
+ * succeeded and passed the ownership to it to add_qgroup_rb(). In any
+ * case, this needs to be NULL or there is something wrong.
+ */
+ ASSERT(prealloc == NULL);
+
return ret;
}
@@ -1695,7 +1682,12 @@ int btrfs_create_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid)
ret = btrfs_sysfs_add_one_qgroup(fs_info, qgroup);
out:
mutex_unlock(&fs_info->qgroup_ioctl_lock);
- kfree(prealloc);
+ /*
+ * At this point we either failed at allocating prealloc, or we
+ * succeeded and passed the ownership to it to add_qgroup_rb(). In any
+ * case, this needs to be NULL or there is something wrong.
+ */
+ ASSERT(prealloc == NULL);
return ret;
}
@@ -1707,8 +1699,7 @@ out:
static int can_delete_qgroup(struct btrfs_fs_info *fs_info, struct btrfs_qgroup *qgroup)
{
struct btrfs_key key;
- struct btrfs_path *path;
- int ret;
+ BTRFS_PATH_AUTO_FREE(path);
/*
* Squota would never be inconsistent, but there can still be case
@@ -1741,13 +1732,11 @@ static int can_delete_qgroup(struct btrfs_fs_info *fs_info, struct btrfs_qgroup
if (!path)
return -ENOMEM;
- ret = btrfs_find_root(fs_info->tree_root, &key, path, NULL, NULL);
- btrfs_free_path(path);
/*
* The @ret from btrfs_find_root() exactly matches our definition for
* the return value, thus can be returned directly.
*/
- return ret;
+ return btrfs_find_root(fs_info->tree_root, &key, path, NULL, NULL);
}
int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid)
@@ -2296,7 +2285,7 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
bool trace_leaf)
{
struct btrfs_key key;
- struct btrfs_path *src_path;
+ BTRFS_PATH_AUTO_FREE(src_path);
struct btrfs_fs_info *fs_info = trans->fs_info;
u32 nodesize = fs_info->nodesize;
int cur_level = root_level;
@@ -2308,10 +2297,8 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
return -EINVAL;
src_path = btrfs_alloc_path();
- if (!src_path) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!src_path)
+ return -ENOMEM;
if (dst_level)
btrfs_node_key_to_cpu(dst_path->nodes[dst_level], &key, 0);
@@ -2337,10 +2324,8 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
parent_slot = src_path->slots[cur_level + 1];
eb = btrfs_read_node_slot(eb, parent_slot);
- if (IS_ERR(eb)) {
- ret = PTR_ERR(eb);
- goto out;
- }
+ if (IS_ERR(eb))
+ return PTR_ERR(eb);
src_path->nodes[cur_level] = eb;
@@ -2361,10 +2346,8 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
&src_key, src_path->slots[cur_level]);
}
/* Content mismatch, something went wrong */
- if (btrfs_comp_cpu_keys(&dst_key, &src_key)) {
- ret = -ENOENT;
- goto out;
- }
+ if (btrfs_comp_cpu_keys(&dst_key, &src_key))
+ return -ENOENT;
cur_level--;
}
@@ -2375,21 +2358,20 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
ret = btrfs_qgroup_trace_extent(trans, src_path->nodes[dst_level]->start,
nodesize);
if (ret < 0)
- goto out;
+ return ret;
ret = btrfs_qgroup_trace_extent(trans, dst_path->nodes[dst_level]->start,
nodesize);
if (ret < 0)
- goto out;
+ return ret;
/* Record leaf file extents */
if (dst_level == 0 && trace_leaf) {
ret = btrfs_qgroup_trace_leaf_items(trans, src_path->nodes[0]);
if (ret < 0)
- goto out;
+ return ret;
ret = btrfs_qgroup_trace_leaf_items(trans, dst_path->nodes[0]);
}
-out:
- btrfs_free_path(src_path);
+
return ret;
}
@@ -2590,7 +2572,7 @@ int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
int level;
u8 drop_subptree_thres;
struct extent_buffer *eb = root_eb;
- struct btrfs_path *path = NULL;
+ BTRFS_PATH_AUTO_FREE(path);
ASSERT(0 <= root_level && root_level < BTRFS_MAX_LEVEL);
ASSERT(root_eb != NULL);
@@ -2623,12 +2605,12 @@ int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
ret = btrfs_read_extent_buffer(root_eb, &check);
if (ret)
- goto out;
+ return ret;
}
if (root_level == 0) {
ret = btrfs_qgroup_trace_leaf_items(trans, root_eb);
- goto out;
+ return ret;
}
path = btrfs_alloc_path();
@@ -2664,10 +2646,8 @@ walk_down:
child_bytenr = btrfs_node_blockptr(eb, parent_slot);
eb = btrfs_read_node_slot(eb, parent_slot);
- if (IS_ERR(eb)) {
- ret = PTR_ERR(eb);
- goto out;
- }
+ if (IS_ERR(eb))
+ return PTR_ERR(eb);
path->nodes[level] = eb;
path->slots[level] = 0;
@@ -2678,14 +2658,14 @@ walk_down:
ret = btrfs_qgroup_trace_extent(trans, child_bytenr,
fs_info->nodesize);
if (ret)
- goto out;
+ return ret;
}
if (level == 0) {
ret = btrfs_qgroup_trace_leaf_items(trans,
path->nodes[level]);
if (ret)
- goto out;
+ return ret;
/* Nonzero return here means we completed our search */
ret = adjust_slots_upwards(path, root_level);
@@ -2699,11 +2679,7 @@ walk_down:
level--;
}
- ret = 0;
-out:
- btrfs_free_path(path);
-
- return ret;
+ return 0;
}
static void qgroup_iterator_nested_add(struct list_head *head, struct btrfs_qgroup *qgroup)
@@ -3303,7 +3279,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
struct btrfs_root *quota_root;
struct btrfs_qgroup *srcgroup;
struct btrfs_qgroup *dstgroup;
- struct btrfs_qgroup *prealloc;
+ struct btrfs_qgroup *prealloc = NULL;
struct btrfs_qgroup_list **qlist_prealloc = NULL;
bool free_inherit = false;
bool need_rescan = false;
@@ -3544,7 +3520,14 @@ out:
}
if (free_inherit)
kfree(inherit);
- kfree(prealloc);
+
+ /*
+ * At this point we either failed at allocating prealloc, or we
+ * succeeded and passed the ownership to it to add_qgroup_rb(). In any
+ * case, this needs to be NULL or there is something wrong.
+ */
+ ASSERT(prealloc == NULL);
+
return ret;
}
@@ -3712,10 +3695,8 @@ static int qgroup_rescan_leaf(struct btrfs_trans_handle *trans,
path, 1, 0);
btrfs_debug(fs_info,
- "current progress key (%llu %u %llu), search_slot ret %d",
- fs_info->qgroup_rescan_progress.objectid,
- fs_info->qgroup_rescan_progress.type,
- fs_info->qgroup_rescan_progress.offset, ret);
+ "current progress key " BTRFS_KEY_FMT ", search_slot ret %d",
+ BTRFS_KEY_FMT_VALUE(&fs_info->qgroup_rescan_progress), ret);
if (ret) {
/*
@@ -3817,8 +3798,8 @@ static void btrfs_qgroup_rescan_worker(struct btrfs_work *work)
* Rescan should only search for commit root, and any later difference
* should be recorded by qgroup
*/
- path->search_commit_root = 1;
- path->skip_locking = 1;
+ path->search_commit_root = true;
+ path->skip_locking = true;
while (!ret && !(stopped = rescan_should_stop(fs_info))) {
trans = btrfs_start_transaction(fs_info->fs_root, 0);
@@ -4796,7 +4777,7 @@ int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_tree_parent_check check = { 0 };
struct btrfs_qgroup_swapped_blocks *blocks = &root->swapped_blocks;
- struct btrfs_qgroup_swapped_block *block;
+ struct btrfs_qgroup_swapped_block AUTO_KFREE(block);
struct extent_buffer *reloc_eb = NULL;
struct rb_node *node;
bool swapped = false;
@@ -4853,7 +4834,6 @@ int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
ret = qgroup_trace_subtree_swap(trans, reloc_eb, subvol_eb,
block->last_snapshot, block->trace_leaf);
free_out:
- kfree(block);
free_extent_buffer(reloc_eb);
out:
if (ret < 0) {
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 13:54:59 +0000