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scsi: scsi_debug: Support injecting unaligned write errors

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Allow user space software, e.g. a blktests test, to inject unaligned
write errors.

Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251113174151.1095574-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche
2025-11-13 09:41:51 -08:00
committed by Martin K. Petersen
parent 78b1a242fe
commit 13b77ed9c2
1 changed files with 11 additions and 1 deletions
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12
drivers/scsi/scsi_debug.c
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@@ -230,6 +230,7 @@ struct tape_block {
#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
#define SDEBUG_OPT_HOST_BUSY 0x8000
#define SDEBUG_OPT_CMD_ABORT 0x10000
#define SDEBUG_OPT_UNALIGNED_WRITE 0x20000
#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
SDEBUG_OPT_RESET_NOISE)
#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
@@ -237,7 +238,8 @@ struct tape_block {
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
SDEBUG_OPT_SHORT_TRANSFER | \
SDEBUG_OPT_HOST_BUSY | \
SDEBUG_OPT_CMD_ABORT)
SDEBUG_OPT_CMD_ABORT | \
SDEBUG_OPT_UNALIGNED_WRITE)
#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
@@ -4932,6 +4934,14 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
u8 *cmd = scp->cmnd;
bool meta_data_locked = false;
if (unlikely(sdebug_opts & SDEBUG_OPT_UNALIGNED_WRITE &&
atomic_read(&sdeb_inject_pending))) {
atomic_set(&sdeb_inject_pending, 0);
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
UNALIGNED_WRITE_ASCQ);
return check_condition_result;
}
switch (cmd[0]) {
case WRITE_16:
ei_lba = 0;