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scsi: target: Report atomic values in INQUIRY

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Report the atomic values in the Block Limits VPD page.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
jpg: handle not having atomic_supported attribute
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251020103820.2917593-6-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie
2025-10-20 10:38:18 +00:00
committed by Martin K. Petersen
parent 5261457251
commit 710ad826e3
1 changed files with 24 additions and 6 deletions
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30
drivers/target/target_core_spc.c
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@@ -521,7 +521,6 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
have_tp = 1;
buf[0] = dev->transport->get_device_type(dev);
buf[3] = have_tp ? 0x3c : 0x10;
/* Set WSNZ to 1 */
buf[4] = 0x01;
@@ -562,11 +561,10 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
else
put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
/*
* Exit now if we don't support TP.
*/
put_unaligned_be16(12, &buf[2]);
if (!have_tp)
goto max_write_same;
goto try_atomic;
/*
* Set MAXIMUM UNMAP LBA COUNT
@@ -595,9 +593,29 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
/*
* MAXIMUM WRITE SAME LENGTH
*/
max_write_same:
put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
put_unaligned_be16(40, &buf[2]);
try_atomic:
/*
* ATOMIC
*/
if (!dev->dev_attrib.atomic_max_len)
goto done;
if (dev->dev_attrib.atomic_max_len < io_max_blocks)
put_unaligned_be32(dev->dev_attrib.atomic_max_len, &buf[44]);
else
put_unaligned_be32(io_max_blocks, &buf[44]);
put_unaligned_be32(dev->dev_attrib.atomic_alignment, &buf[48]);
put_unaligned_be32(dev->dev_attrib.atomic_granularity, &buf[52]);
put_unaligned_be32(dev->dev_attrib.atomic_max_with_boundary, &buf[56]);
put_unaligned_be32(dev->dev_attrib.atomic_max_boundary, &buf[60]);
put_unaligned_be16(60, &buf[2]);
done:
return 0;
}