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btrfs: convert btrfs_block_group::seq_zone to runtime flag

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[ Upstream commit 961f5b8bf48a463ac5fe5b13143426d79eb41817 ]

In zoned mode the sequential status of zone can be also tracked in the
runtime flags of block group.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Stable-dep-of: 0657b20c5a76 ("btrfs: fix use-after-free of new block group that became unused")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Sterba 2022-10-31 20:33:46 +01:00 committed by Greg Kroah-Hartman
parent 94cde94169
commit 29cebf8087
2 changed files with 6 additions and 6 deletions
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5
fs/btrfs/block-group.h
View File

@ -57,6 +57,8 @@ enum btrfs_block_group_flags {
BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
/* Does the block group need to be added to the free space tree? */
BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
/* Indicate that the block group is placed on a sequential zone */
BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE,
};
enum btrfs_caching_type {
@ -206,9 +208,6 @@ struct btrfs_block_group {
/* Lock for free space tree operations. */
struct mutex free_space_lock;
/* Flag indicating this block group is placed on a sequential zone */
bool seq_zone;
/*
* Number of extents in this block group used for swap files.
* All accesses protected by the spinlock 'lock'.

7
fs/btrfs/zoned.c
View File

@ -1436,7 +1436,7 @@ int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new)
}
if (num_sequential > 0)
cache->seq_zone = true;
set_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags);
if (num_conventional > 0) {
/* Zone capacity is always zone size in emulation */
@ -1658,7 +1658,7 @@ bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start)
if (!cache)
return false;
ret = cache->seq_zone;
ret = !!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags);
btrfs_put_block_group(cache);
return ret;
@ -2177,7 +2177,8 @@ static void btrfs_zone_finish_endio_workfn(struct work_struct *work)
void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
struct extent_buffer *eb)
{
if (!bg->seq_zone || eb->start + eb->len * 2 <= bg->start + bg->zone_capacity)
if (!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &bg->runtime_flags) ||
eb->start + eb->len * 2 <= bg->start + bg->zone_capacity)
return;
if (WARN_ON(bg->zone_finish_work.func == btrfs_zone_finish_endio_workfn)) {