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btrfs: move block_group_item::used to block group

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For unknown reasons, the member 'used' in the block group struct is
stored in the b-tree item and accessed everywhere using the special
accessor helper. Let's unify it and make it a regular member and only
update the item before writing it to the tree.

The item is still being used for flags and chunk_objectid, there's some
duplication until the item is removed in following patches.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
2019-10-23 18:48:11 +02:00
parent 34b127aecd
commit bf38be65f3
11 changed files with 42 additions and 34 deletions
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5
include/trace/events/btrfs.h
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@@ -716,8 +716,7 @@ TRACE_EVENT(btrfs_add_block_group,
__entry->offset = block_group->key.objectid;
__entry->size = block_group->key.offset;
__entry->flags = block_group->flags;
__entry->bytes_used =
btrfs_block_group_used(&block_group->item);
__entry->bytes_used = block_group->used;
__entry->bytes_super = block_group->bytes_super;
__entry->create = create;
),
@@ -1859,7 +1858,7 @@ DECLARE_EVENT_CLASS(btrfs__block_group,
TP_fast_assign_btrfs(bg_cache->fs_info,
__entry->bytenr = bg_cache->key.objectid,
__entry->len = bg_cache->key.offset,
__entry->used = btrfs_block_group_used(&bg_cache->item);
__entry->used = bg_cache->used;
__entry->flags = bg_cache->flags;
),