diff options
Diffstat (limited to 'fs/btrfs/block-group.h')
| -rw-r--r-- | fs/btrfs/block-group.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h index 107bb557ca8d..b6ee70a039c7 100644 --- a/fs/btrfs/block-group.h +++ b/fs/btrfs/block-group.h @@ -129,8 +129,17 @@ struct btrfs_block_group { /* For read-only block groups */ struct list_head ro_list; + /* + * When non-zero it means the block group's logical address and its + * device extents can not be reused for future block group allocations + * until the counter goes down to 0. This is to prevent them from being + * reused while some task is still using the block group after it was + * deleted - we want to make sure they can only be reused for new block + * groups after that task is done with the deleted block group. + */ + atomic_t frozen; + /* For discard operations */ - atomic_t trimming; struct list_head discard_list; int discard_index; u64 discard_eligible_time; @@ -283,6 +292,9 @@ static inline int btrfs_block_group_done(struct btrfs_block_group *cache) cache->cached == BTRFS_CACHE_ERROR; } +void btrfs_freeze_block_group(struct btrfs_block_group *cache); +void btrfs_unfreeze_block_group(struct btrfs_block_group *cache); + #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start, u64 physical, u64 **logical, int *naddrs, int *stripe_len); |