Show the SCSI CDB, .eh_eflags and .result for pending SCSI commands
in /sys/kernel/debug/block/*/mq/*/dispatch and */rq_list.
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Omar Sandoval <osandov@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: <linux-scsi@xxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7bc4513bf4e4..52604573e4b6 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2126,6 +2126,31 @@ static void scsi_exit_rq(struct request_queue *q, struct request *rq)
scsi_free_sense_buffer(shost, cmd->sense_buffer);
}
+static const char *const ehflag_name[] = {
+ [ilog2(SCSI_EH_CANCEL_CMD)] = "CANCEL_CMD",
+ [ilog2(SCSI_EH_ABORT_SCHEDULED)] = "ABORT_SCHEDULED",
+};
+
+static void scsi_show_rq(struct seq_file *m, struct request *rq)
+{
+ struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
+ unsigned int i;
+
+ seq_puts(m, ", .cmd =");
+ for (i = 0; i < cmd->cmd_len; i++)
+ seq_printf(m, " %02x", cmd->cmnd[i]);
+ seq_puts(m, ", .eh_eflags =");
+ for (i = 0; i < sizeof(cmd->eh_eflags) * BITS_PER_BYTE; i++) {
+ if (!(cmd->eh_eflags & BIT(i)))
+ continue;
+ if (i < ARRAY_SIZE(ehflag_name) && ehflag_name[i])
+ seq_printf(m, " %s", ehflag_name[i]);
+ else
+ seq_printf(m, " %d", i);
+ }
+ seq_printf(m, ", .result = %#06x", cmd->result);
+}
+
struct request_queue *scsi_alloc_queue(struct scsi_device *sdev)
{
struct Scsi_Host *shost = sdev->host;
@@ -2158,6 +2183,7 @@ static const struct blk_mq_ops scsi_mq_ops = {
.queue_rq = scsi_queue_rq,
.complete = scsi_softirq_done,
.timeout = scsi_timeout,
+ .show_rq = scsi_show_rq,
.init_request = scsi_init_request,
.exit_request = scsi_exit_request,
.map_queues = scsi_map_queues,
--
2.12.2
