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btrfs: zoned: implement active zone tracking

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Add zone_is_active flag to btrfs_block_group. This flag indicates the
underlying zones are all active. Such zone active block groups are tracked
by fs_info->active_bg_list.

btrfs_dev_{set,clear}_active_zone() take responsibility for the underlying
device part. They set/clear the bitmap to indicate zone activeness and
count the number of zones we can activate left.

btrfs_zone_{activate,finish}() take responsibility for the logical part and
the list management. In addition, btrfs_zone_finish() wait for any writes
on it and send REQ_OP_ZONE_FINISH to the zone.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota
2021-08-19 21:19:17 +09:00
committed by David Sterba
parent dafc340dbd
commit afba2bc036
7 changed files with 226 additions and 2 deletions
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12
fs/btrfs/zoned.h
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@ -69,6 +69,8 @@ int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
u64 physical_start, u64 physical_pos);
struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info,
u64 logical, u64 length);
bool btrfs_zone_activate(struct btrfs_block_group *block_group);
int btrfs_zone_finish(struct btrfs_block_group *block_group);
#else /* CONFIG_BLK_DEV_ZONED */
static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
struct blk_zone *zone)
@ -204,6 +206,16 @@ static inline struct btrfs_device *btrfs_zoned_get_device(
return ERR_PTR(-EOPNOTSUPP);
}
static inline bool btrfs_zone_activate(struct btrfs_block_group *block_group)
{
return true;
}
static inline int btrfs_zone_finish(struct btrfs_block_group *block_group)
{
return 0;
}
#endif
static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)