scsi-trace: Decode MAINTENANCE_IN and MAINTENANCE_OUT commands

Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c
index 08bb47b53bc3e6b43a7190377fcb2f2b850dab59..76d4e6fd9dc18fd2c330588ab13b37fcadf038bc 100644 (file)
--- 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)
@@ -230,6 +231,92 @@ out:
        return ret;
 }
 
+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)
 {
@@ -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);
        }