[PATCH v2 3/4] scsi: scsi_debug: Map the region written by WRITE ATOMIC (16)

[Niklas Cassel <cassel@kernel.org>]

When logical block provisioning is enabled, a command that writes user
data marks the region that it wrote in the provisioning map, so that
GET LBA STATUS reports the region as mapped. resp_write_dt0(),
resp_write_scat() and resp_write_same() all call map_region() for that.

resp_atomic_write() does not, so a WRITE ATOMIC (16) leaves the
provisioning map untouched, and GET LBA STATUS keeps reporting the
region as deallocated after it has been written. map_state(), which
GET LBA STATUS uses, is the only reader of the map, so that is the whole
of the effect.

Call map_region() the way resp_write_dt0() does.

Assisted-by: LLM
Fixes: 84f3a3c01d70 ("scsi: scsi_debug: Atomic write support")
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
Tested with lbpu=1 added to the configuration used for the rest of the
series. GET LBA STATUS reports a region that has never been written as
deallocated, and reports eight blocks as mapped after either an ordinary
WRITE(16) or a WRITE ATOMIC(16) of eight blocks at the same LBA. Only
the WRITE(16) case did so before this patch.
---
 drivers/scsi/scsi_debug.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index ddcc7a920089..5a08f02130ef 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -6213,6 +6213,9 @@ static int resp_atomic_write(struct scsi_cmnd *scp,
 	}
 
 	ret = do_device_access(sip, scp, 0, lba, len, 0, true, true);
+	if (unlikely(scsi_debug_lbp()))
+		map_region(sip, lba, len);
+
 	if (unlikely(ret == -1))
 		return DID_ERROR << 16;
 	if (unlikely(ret != len * sdebug_sector_size))
-- 
2.55.0