diff options
| author | Naohiro Aota <naohiro.aota@wdc.com> | 2020-11-10 20:26:09 +0900 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-09 19:16:04 +0100 |
| commit | 862931c76327e54d49c30d80c333f552dca18489 (patch) | |
| tree | 2754b1621ecb194104192d4973340fb7e8321f7f /fs/btrfs/zoned.c | |
| parent | b70f509774ad4b75d4253ad23b65c35d89402026 (diff) | |
btrfs: introduce max_zone_append_size
The zone append write command has a maximum IO size restriction it
accepts. This is because a zone append write command cannot be split, as
we ask the device to place the data into a specific target zone and the
device responds with the actual written location of the data.
Introduce max_zone_append_size to zone_info and fs_info to track the
value, so we can limit all I/O to a zoned block device that we want to
write using the zone append command to the device's limits.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/zoned.c')
| -rw-r--r-- | fs/btrfs/zoned.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c index 56bb701e3b53..f984cf9063ee 100644 --- a/fs/btrfs/zoned.c +++ b/fs/btrfs/zoned.c @@ -47,6 +47,7 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device) { struct btrfs_zoned_device_info *zone_info = NULL; struct block_device *bdev = device->bdev; + struct request_queue *queue = bdev_get_queue(bdev); sector_t nr_sectors; sector_t sector = 0; struct blk_zone *zones = NULL; @@ -70,6 +71,8 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device) ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0); zone_info->zone_size = zone_sectors << SECTOR_SHIFT; zone_info->zone_size_shift = ilog2(zone_info->zone_size); + zone_info->max_zone_append_size = + (u64)queue_max_zone_append_sectors(queue) << SECTOR_SHIFT; zone_info->nr_zones = nr_sectors >> ilog2(zone_sectors); if (!IS_ALIGNED(nr_sectors, zone_sectors)) zone_info->nr_zones++; @@ -174,6 +177,7 @@ int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) u64 zoned_devices = 0; u64 nr_devices = 0; u64 zone_size = 0; + u64 max_zone_append_size = 0; const bool incompat_zoned = btrfs_is_zoned(fs_info); int ret = 0; @@ -187,10 +191,13 @@ int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) model = bdev_zoned_model(device->bdev); if (model == BLK_ZONED_HM || (model == BLK_ZONED_HA && incompat_zoned)) { + struct btrfs_zoned_device_info *zone_info; + + zone_info = device->zone_info; zoned_devices++; if (!zone_size) { - zone_size = device->zone_info->zone_size; - } else if (device->zone_info->zone_size != zone_size) { + zone_size = zone_info->zone_size; + } else if (zone_info->zone_size != zone_size) { btrfs_err(fs_info, "zoned: unequal block device zone sizes: have %llu found %llu", device->zone_info->zone_size, @@ -198,6 +205,11 @@ int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) ret = -EINVAL; goto out; } + if (!max_zone_append_size || + (zone_info->max_zone_append_size && + zone_info->max_zone_append_size < max_zone_append_size)) + max_zone_append_size = + zone_info->max_zone_append_size; } nr_devices++; } @@ -241,6 +253,7 @@ int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) } fs_info->zone_size = zone_size; + fs_info->max_zone_append_size = max_zone_append_size; btrfs_info(fs_info, "zoned mode enabled with zone size %llu", zone_size); out: |