diff mbox series

[RFC,v2,3/8] scsi: sd: set BLK_FEAT_WRITE_ZEROES_UNMAP if device supports unmap zeroing mode

Message ID 20250115114637.2705887-4-yi.zhang@huaweicloud.com (mailing list archive)
State New
Headers show
Series [RFC,v2,1/8] block: introduce BLK_FEAT_WRITE_ZEROES_UNMAP to queue limits features | expand

Commit Message

Zhang Yi Jan. 15, 2025, 11:46 a.m. UTC 
From: Zhang Yi <yi.zhang@huawei.com>

When the device supports the Write Zeroes command and the zeroing mode
is set to SD_ZERO_WS16_UNMAP or SD_ZERO_WS10_UNMAP, this means that the
device supports unmap Write Zeroes, so set the corresponding
BLK_FEAT_WRITE_ZEROES_UNMAP feature to the device's queue limit.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 drivers/scsi/sd.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Christoph Hellwig Jan. 28, 2025, 6:47 a.m. UTC | #1 
On Wed, Jan 15, 2025 at 07:46:32PM +0800, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@huawei.com>
> 
> When the device supports the Write Zeroes command and the zeroing mode
> is set to SD_ZERO_WS16_UNMAP or SD_ZERO_WS10_UNMAP, this means that the
> device supports unmap Write Zeroes, so set the corresponding
> BLK_FEAT_WRITE_ZEROES_UNMAP feature to the device's queue limit.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 8947dab132d7..95e115c69286 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1122,6 +1122,11 @@  static void sd_config_write_same(struct scsi_disk *sdkp,
 	else
 		sdkp->zeroing_mode = SD_ZERO_WRITE;
 
+	if (sdkp->max_ws_blocks &&
+	    (sdkp->zeroing_mode == SD_ZERO_WS16_UNMAP ||
+	     sdkp->zeroing_mode == SD_ZERO_WS10_UNMAP))
+		lim->features |= BLK_FEAT_WRITE_ZEROES_UNMAP;
+
 	if (sdkp->max_ws_blocks &&
 	    sdkp->physical_block_size > logical_block_size) {
 		/*