[PATCHv2 2/3] scsi-trace: Decode MAINTENANCE_IN and MAINTENANCE_OUT commands

Hannes Reinecke
2016-03-24T14:21:32Z

drivers/scsi/scsi_trace.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 91 insertions(+)

diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c
index 08bb47b..1d43888 100644
--- a/drivers/scsi/scsi_trace.c
+++ b/drivers/scsi/scsi_trace.c
@@ -17,6 +17,7 @@
*/
#include <linux/kernel.h>
#include <linux/trace_seq.h>
+#include <asm/unaligned.h>
#include <trace/events/scsi.h>

#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
@@ -231,6 +232,92 @@ out:
}

static const char *
+scsi_trace_maintenance_in(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = trace_seq_buffer_ptr(p), *cmd;
+ u32 alloc_len;
+
+ switch (SERVICE_ACTION16(cdb)) {
+ case MI_REPORT_IDENTIFYING_INFORMATION:
+ cmd = "REPORT_IDENTIFYING_INFORMATION";
+ break;
+ case MI_REPORT_TARGET_PGS:
+ cmd = "REPORT_TARGET_PORT_GROUPS";
+ break;
+ case MI_REPORT_ALIASES:
+ cmd = "REPORT_ALIASES";
+ break;
+ case MI_REPORT_SUPPORTED_OPERATION_CODES:
+ cmd = "REPORT_SUPPORTED_OPERATION_CODES";
+ break;
+ case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
+ cmd = "REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS";
+ break;
+ case MI_REPORT_PRIORITY:
+ cmd = "REPORT_PRIORITY";
+ break;
+ case MI_REPORT_TIMESTAMP:
+ cmd = "REPORT_TIMESTAMP";
+ break;
+ case MI_MANAGEMENT_PROTOCOL_IN:
+ cmd = "MANAGEMENT_PROTOCOL_IN";
+ break;
+ default:
+ trace_seq_puts(p, "UNKNOWN");
+ goto out;
+ }
+
+ alloc_len = get_unaligned_be32(&cdb[6]);
+
+ trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
+
+out:
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *
+scsi_trace_maintenance_out(struct trace_seq *p, unsigned char *cdb, int len)
+{
+ const char *ret = trace_seq_buffer_ptr(p), *cmd;
+ u32 alloc_len;
+
+ switch (SERVICE_ACTION16(cdb)) {
+ case MO_SET_IDENTIFYING_INFORMATION:
+ cmd = "SET_IDENTIFYING_INFORMATION";
+ break;
+ case MO_SET_TARGET_PGS:
+ cmd = "SET_TARGET_PORT_GROUPS";
+ break;
+ case MO_CHANGE_ALIASES:
+ cmd = "CHANGE_ALIASES";
+ break;
+ case MO_SET_PRIORITY:
+ cmd = "SET_PRIORITY";
+ break;
+ case MO_SET_TIMESTAMP:
+ cmd = "SET_TIMESTAMP";
+ break;
+ case MO_MANAGEMENT_PROTOCOL_OUT:
+ cmd = "MANAGEMENT_PROTOCOL_OUT";
+ break;
+ default:
+ trace_seq_puts(p, "UNKNOWN");
+ goto out;
+ }
+
+ alloc_len = get_unaligned_be32(&cdb[6]);
+
+ trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
+
+out:
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+static const char *
scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (SERVICE_ACTION32(cdb)) {
@@ -282,6 +369,10 @@ scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
return scsi_trace_service_action_in(p, cdb, len);
case VARIABLE_LENGTH_CMD:
return scsi_trace_varlen(p, cdb, len);
+ case MAINTENANCE_IN:
+ return scsi_trace_maintenance_in(p, cdb, len);
+ case MAINTENANCE_OUT:
+ return scsi_trace_maintenance_out(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
}
--
1.8.5.6