From d70cbdda75da3f258118a558c087157e073229fb Mon Sep 17 00:00:00 2001 From: Naohiro Aota Date: Tue, 3 May 2022 17:48:51 -0700 Subject: btrfs: zoned: consolidate zone finish functions btrfs_zone_finish() and btrfs_zone_finish_endio() have similar code. Introduce do_zone_finish() to factor out the common code. Reviewed-by: Johannes Thumshirn Signed-off-by: Naohiro Aota Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/zoned.c | 137 ++++++++++++++++++++++++++----------------------------- 1 file changed, 64 insertions(+), 73 deletions(-) diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index cc0c5dd5a901..eb63b5ec3be8 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -1873,20 +1873,14 @@ out_unlock: return ret; } -int btrfs_zone_finish(struct btrfs_block_group *block_group) +static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_written) { struct btrfs_fs_info *fs_info = block_group->fs_info; struct map_lookup *map; - struct btrfs_device *device; - u64 physical; + bool need_zone_finish; int ret = 0; int i; - if (!btrfs_is_zoned(fs_info)) - return 0; - - map = block_group->physical_map; - spin_lock(&block_group->lock); if (!block_group->zone_is_active) { spin_unlock(&block_group->lock); @@ -1900,36 +1894,52 @@ int btrfs_zone_finish(struct btrfs_block_group *block_group) spin_unlock(&block_group->lock); return -EAGAIN; } - spin_unlock(&block_group->lock); - - ret = btrfs_inc_block_group_ro(block_group, false); - if (ret) - return ret; - - /* Ensure all writes in this block group finish */ - btrfs_wait_block_group_reservations(block_group); - /* No need to wait for NOCOW writers. Zoned mode does not allow that. */ - btrfs_wait_ordered_roots(fs_info, U64_MAX, block_group->start, - block_group->length); - - spin_lock(&block_group->lock); /* - * Bail out if someone already deactivated the block group, or - * allocated space is left in the block group. + * If we are sure that the block group is full (= no more room left for + * new allocation) and the IO for the last usable block is completed, we + * don't need to wait for the other IOs. This holds because we ensure + * the sequential IO submissions using the ZONE_APPEND command for data + * and block_group->meta_write_pointer for metadata. */ - if (!block_group->zone_is_active) { + if (!fully_written) { spin_unlock(&block_group->lock); - btrfs_dec_block_group_ro(block_group); - return 0; - } - if (block_group->reserved) { - spin_unlock(&block_group->lock); - btrfs_dec_block_group_ro(block_group); - return -EAGAIN; + ret = btrfs_inc_block_group_ro(block_group, false); + if (ret) + return ret; + + /* Ensure all writes in this block group finish */ + btrfs_wait_block_group_reservations(block_group); + /* No need to wait for NOCOW writers. Zoned mode does not allow that */ + btrfs_wait_ordered_roots(fs_info, U64_MAX, block_group->start, + block_group->length); + + spin_lock(&block_group->lock); + + /* + * Bail out if someone already deactivated the block group, or + * allocated space is left in the block group. + */ + if (!block_group->zone_is_active) { + spin_unlock(&block_group->lock); + btrfs_dec_block_group_ro(block_group); + return 0; + } + + if (block_group->reserved) { + spin_unlock(&block_group->lock); + btrfs_dec_block_group_ro(block_group); + return -EAGAIN; + } } + /* + * The block group is not fully allocated, so not fully written yet. We + * need to send ZONE_FINISH command to free up an active zone. + */ + need_zone_finish = !btrfs_zoned_bg_is_full(block_group); + block_group->zone_is_active = 0; block_group->alloc_offset = block_group->zone_capacity; block_group->free_space_ctl->free_space = 0; @@ -1937,24 +1947,29 @@ int btrfs_zone_finish(struct btrfs_block_group *block_group) btrfs_clear_data_reloc_bg(block_group); spin_unlock(&block_group->lock); + map = block_group->physical_map; for (i = 0; i < map->num_stripes; i++) { - device = map->stripes[i].dev; - physical = map->stripes[i].physical; + struct btrfs_device *device = map->stripes[i].dev; + const u64 physical = map->stripes[i].physical; if (device->zone_info->max_active_zones == 0) continue; - ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH, - physical >> SECTOR_SHIFT, - device->zone_info->zone_size >> SECTOR_SHIFT, - GFP_NOFS); + if (need_zone_finish) { + ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH, + physical >> SECTOR_SHIFT, + device->zone_info->zone_size >> SECTOR_SHIFT, + GFP_NOFS); - if (ret) - return ret; + if (ret) + return ret; + } btrfs_dev_clear_active_zone(device, physical); } - btrfs_dec_block_group_ro(block_group); + + if (!fully_written) + btrfs_dec_block_group_ro(block_group); spin_lock(&fs_info->zone_active_bgs_lock); ASSERT(!list_empty(&block_group->active_bg_list)); @@ -1967,6 +1982,14 @@ int btrfs_zone_finish(struct btrfs_block_group *block_group) return 0; } +int btrfs_zone_finish(struct btrfs_block_group *block_group) +{ + if (!btrfs_is_zoned(block_group->fs_info)) + return 0; + + return do_zone_finish(block_group, false); +} + bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) { struct btrfs_fs_info *fs_info = fs_devices->fs_info; @@ -1998,9 +2021,6 @@ bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length) { struct btrfs_block_group *block_group; - struct map_lookup *map; - struct btrfs_device *device; - u64 physical; if (!btrfs_is_zoned(fs_info)) return; @@ -2011,36 +2031,7 @@ void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 len if (logical + length < block_group->start + block_group->zone_capacity) goto out; - spin_lock(&block_group->lock); - - if (!block_group->zone_is_active) { - spin_unlock(&block_group->lock); - goto out; - } - - block_group->zone_is_active = 0; - /* We should have consumed all the free space */ - ASSERT(block_group->alloc_offset == block_group->zone_capacity); - ASSERT(block_group->free_space_ctl->free_space == 0); - btrfs_clear_treelog_bg(block_group); - btrfs_clear_data_reloc_bg(block_group); - spin_unlock(&block_group->lock); - - map = block_group->physical_map; - device = map->stripes[0].dev; - physical = map->stripes[0].physical; - - if (!device->zone_info->max_active_zones) - goto out; - - btrfs_dev_clear_active_zone(device, physical); - - spin_lock(&fs_info->zone_active_bgs_lock); - ASSERT(!list_empty(&block_group->active_bg_list)); - list_del_init(&block_group->active_bg_list); - spin_unlock(&fs_info->zone_active_bgs_lock); - - btrfs_put_block_group(block_group); + do_zone_finish(block_group, true); out: btrfs_put_block_group(block_group); -- cgit v1.2.3