diff options
| author | Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> | 2023-03-06 15:30:24 +0900 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-03-06 18:33:13 -0500 |
| commit | 288b3271d920c9ba949c3bab0f749f4cecc70e09 (patch) | |
| tree | b1d87457a1b25e4b5e7db33870e8f868ddf1eb8f | |
| parent | 11d9874c4204a785f43d899a1ab12f9dc8d9de3e (diff) | |
scsi: sd: Fix wrong zone_write_granularity value during revalidate
When the sd driver revalidates host-managed SMR disks, it calls
disk_set_zoned() which changes the zone_write_granularity attribute value
to the logical block size regardless of the device type. After that, the sd
driver overwrites the value in sd_zbc_read_zone() with the physical block
size, since ZBC/ZAC requires this for host-managed disks. Between the calls
to disk_set_zoned() and sd_zbc_read_zone(), there exists a window where the
attribute shows the logical block size as the zone_write_granularity value,
which is wrong for host-managed disks. The duration of the window is from
20ms to 200ms, depending on report zone command execution time.
To avoid the wrong zone_write_granularity value between disk_set_zoned()
and sd_zbc_read_zone(), modify the value not in sd_zbc_read_zone() but
just after disk_set_zoned() call.
Fixes: a805a4fa4fa3 ("block: introduce zone_write_granularity limit")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20230306063024.3376959-1-shinichiro.kawasaki@wdc.com
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/sd.c | 7 | ||||
| -rw-r--r-- | drivers/scsi/sd_zbc.c | 8 |
2 files changed, 6 insertions, 9 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 4f28dd617eca..4bb87043e6db 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2988,8 +2988,13 @@ static void sd_read_block_characteristics(struct scsi_disk *sdkp) } if (sdkp->device->type == TYPE_ZBC) { - /* Host-managed */ + /* + * Host-managed: Per ZBC and ZAC specifications, writes in + * sequential write required zones of host-managed devices must + * be aligned to the device physical block size. + */ disk_set_zoned(sdkp->disk, BLK_ZONED_HM); + blk_queue_zone_write_granularity(q, sdkp->physical_block_size); } else { sdkp->zoned = zoned; if (sdkp->zoned == 1) { diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 6b3a02d4406c..22801c24ea19 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -965,14 +965,6 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, u8 buf[SD_BUF_SIZE]) disk_set_max_active_zones(disk, 0); nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks); - /* - * Per ZBC and ZAC specifications, writes in sequential write required - * zones of host-managed devices must be aligned to the device physical - * block size. - */ - if (blk_queue_zoned_model(q) == BLK_ZONED_HM) - blk_queue_zone_write_granularity(q, sdkp->physical_block_size); - sdkp->early_zone_info.nr_zones = nr_zones; sdkp->early_zone_info.zone_blocks = zone_blocks; |