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Diffstat (limited to 'fs/btrfs/block-group.c')
-rw-r--r--fs/btrfs/block-group.c86
1 files changed, 42 insertions, 44 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 5b10401d803b..5fc670c27f86 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -558,14 +558,15 @@ u64 add_new_free_space(struct btrfs_block_group *block_group, u64 start, u64 end
static int sample_block_group_extent_item(struct btrfs_caching_control *caching_ctl,
struct btrfs_block_group *block_group,
int index, int max_index,
- struct btrfs_key *key)
+ struct btrfs_key *found_key)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
struct btrfs_root *extent_root;
- int ret = 0;
u64 search_offset;
u64 search_end = block_group->start + block_group->length;
struct btrfs_path *path;
+ struct btrfs_key search_key;
+ int ret = 0;
ASSERT(index >= 0);
ASSERT(index <= max_index);
@@ -585,37 +586,24 @@ static int sample_block_group_extent_item(struct btrfs_caching_control *caching_
path->reada = READA_FORWARD;
search_offset = index * div_u64(block_group->length, max_index);
- key->objectid = block_group->start + search_offset;
- key->type = BTRFS_EXTENT_ITEM_KEY;
- key->offset = 0;
+ search_key.objectid = block_group->start + search_offset;
+ search_key.type = BTRFS_EXTENT_ITEM_KEY;
+ search_key.offset = 0;
- while (1) {
- ret = btrfs_search_forward(extent_root, key, path, 0);
- if (ret != 0)
- goto out;
+ btrfs_for_each_slot(extent_root, &search_key, found_key, path, ret) {
/* Success; sampled an extent item in the block group */
- if (key->type == BTRFS_EXTENT_ITEM_KEY &&
- key->objectid >= block_group->start &&
- key->objectid + key->offset <= search_end)
- goto out;
+ if (found_key->type == BTRFS_EXTENT_ITEM_KEY &&
+ found_key->objectid >= block_group->start &&
+ found_key->objectid + found_key->offset <= search_end)
+ break;
/* We can't possibly find a valid extent item anymore */
- if (key->objectid >= search_end) {
+ if (found_key->objectid >= search_end) {
ret = 1;
break;
}
- if (key->type < BTRFS_EXTENT_ITEM_KEY)
- key->type = BTRFS_EXTENT_ITEM_KEY;
- else
- key->objectid++;
- btrfs_release_path(path);
- up_read(&fs_info->commit_root_sem);
- mutex_unlock(&caching_ctl->mutex);
- cond_resched();
- mutex_lock(&caching_ctl->mutex);
- down_read(&fs_info->commit_root_sem);
}
-out:
+
lockdep_assert_held(&caching_ctl->mutex);
lockdep_assert_held_read(&fs_info->commit_root_sem);
btrfs_free_path(path);
@@ -659,6 +647,7 @@ out:
static int load_block_group_size_class(struct btrfs_caching_control *caching_ctl,
struct btrfs_block_group *block_group)
{
+ struct btrfs_fs_info *fs_info = block_group->fs_info;
struct btrfs_key key;
int i;
u64 min_size = block_group->length;
@@ -668,6 +657,8 @@ static int load_block_group_size_class(struct btrfs_caching_control *caching_ctl
if (!btrfs_block_group_should_use_size_class(block_group))
return 0;
+ lockdep_assert_held(&caching_ctl->mutex);
+ lockdep_assert_held_read(&fs_info->commit_root_sem);
for (i = 0; i < 5; ++i) {
ret = sample_block_group_extent_item(caching_ctl, block_group, i, 5, &key);
if (ret < 0)
@@ -682,7 +673,6 @@ static int load_block_group_size_class(struct btrfs_caching_control *caching_ctl
block_group->size_class = size_class;
spin_unlock(&block_group->lock);
}
-
out:
return ret;
}
@@ -1185,14 +1175,8 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
< block_group->zone_unusable);
WARN_ON(block_group->space_info->disk_total
< block_group->length * factor);
- WARN_ON(test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
- &block_group->runtime_flags) &&
- block_group->space_info->active_total_bytes
- < block_group->length);
}
block_group->space_info->total_bytes -= block_group->length;
- if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags))
- block_group->space_info->active_total_bytes -= block_group->length;
block_group->space_info->bytes_readonly -=
(block_group->length - block_group->zone_unusable);
block_group->space_info->bytes_zone_unusable -=
@@ -1836,7 +1820,8 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
btrfs_info(fs_info,
"reclaiming chunk %llu with %llu%% used %llu%% unusable",
- bg->start, div_u64(bg->used * 100, bg->length),
+ bg->start,
+ div64_u64(bg->used * 100, bg->length),
div64_u64(zone_unusable * 100, bg->length));
trace_btrfs_reclaim_block_group(bg);
ret = btrfs_relocate_chunk(fs_info, bg->start);
@@ -2493,18 +2478,29 @@ static int insert_block_group_item(struct btrfs_trans_handle *trans,
struct btrfs_block_group_item bgi;
struct btrfs_root *root = btrfs_block_group_root(fs_info);
struct btrfs_key key;
+ u64 old_commit_used;
+ int ret;
spin_lock(&block_group->lock);
btrfs_set_stack_block_group_used(&bgi, block_group->used);
btrfs_set_stack_block_group_chunk_objectid(&bgi,
block_group->global_root_id);
btrfs_set_stack_block_group_flags(&bgi, block_group->flags);
+ old_commit_used = block_group->commit_used;
+ block_group->commit_used = block_group->used;
key.objectid = block_group->start;
key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
key.offset = block_group->length;
spin_unlock(&block_group->lock);
- return btrfs_insert_item(trans, root, &key, &bgi, sizeof(bgi));
+ ret = btrfs_insert_item(trans, root, &key, &bgi, sizeof(bgi));
+ if (ret < 0) {
+ spin_lock(&block_group->lock);
+ block_group->commit_used = old_commit_used;
+ spin_unlock(&block_group->lock);
+ }
+
+ return ret;
}
static int insert_dev_extent(struct btrfs_trans_handle *trans,
@@ -3474,6 +3470,7 @@ int btrfs_update_block_group(struct btrfs_trans_handle *trans,
spin_unlock(&info->delalloc_root_lock);
while (total) {
+ struct btrfs_space_info *space_info;
bool reclaim = false;
cache = btrfs_lookup_block_group(info, bytenr);
@@ -3481,6 +3478,7 @@ int btrfs_update_block_group(struct btrfs_trans_handle *trans,
ret = -ENOENT;
break;
}
+ space_info = cache->space_info;
factor = btrfs_bg_type_to_factor(cache->flags);
/*
@@ -3495,7 +3493,7 @@ int btrfs_update_block_group(struct btrfs_trans_handle *trans,
byte_in_group = bytenr - cache->start;
WARN_ON(byte_in_group > cache->length);
- spin_lock(&cache->space_info->lock);
+ spin_lock(&space_info->lock);
spin_lock(&cache->lock);
if (btrfs_test_opt(info, SPACE_CACHE) &&
@@ -3508,24 +3506,24 @@ int btrfs_update_block_group(struct btrfs_trans_handle *trans,
old_val += num_bytes;
cache->used = old_val;
cache->reserved -= num_bytes;
- cache->space_info->bytes_reserved -= num_bytes;
- cache->space_info->bytes_used += num_bytes;
- cache->space_info->disk_used += num_bytes * factor;
+ space_info->bytes_reserved -= num_bytes;
+ space_info->bytes_used += num_bytes;
+ space_info->disk_used += num_bytes * factor;
spin_unlock(&cache->lock);
- spin_unlock(&cache->space_info->lock);
+ spin_unlock(&space_info->lock);
} else {
old_val -= num_bytes;
cache->used = old_val;
cache->pinned += num_bytes;
- btrfs_space_info_update_bytes_pinned(info,
- cache->space_info, num_bytes);
- cache->space_info->bytes_used -= num_bytes;
- cache->space_info->disk_used -= num_bytes * factor;
+ btrfs_space_info_update_bytes_pinned(info, space_info,
+ num_bytes);
+ space_info->bytes_used -= num_bytes;
+ space_info->disk_used -= num_bytes * factor;
reclaim = should_reclaim_block_group(cache, num_bytes);
spin_unlock(&cache->lock);
- spin_unlock(&cache->space_info->lock);
+ spin_unlock(&space_info->lock);
set_extent_dirty(&trans->transaction->pinned_extents,
bytenr, bytenr + num_bytes - 1,
generated by cgit (git 2.34.1) at 2024-05-29 13:50:38 +0000