1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/bitops.h>
3 #include <linux/seq_file.h>
4 #include <scsi/scsi_cmnd.h>
5 #include <scsi/scsi_dbg.h>
6 #include "scsi_debugfs.h"
7
8 #define SCSI_CMD_FLAG_NAME(name)[const_ilog2(SCMD_##name)] = #name
9 static const char *const scsi_cmd_flags[] = {
10 SCSI_CMD_FLAG_NAME(TAGGED),
11 SCSI_CMD_FLAG_NAME(INITIALIZED),
12 };
13 #undef SCSI_CMD_FLAG_NAME
14
scsi_flags_show(struct seq_file * m,const unsigned long flags,const char * const * flag_name,int flag_name_count)15 static int scsi_flags_show(struct seq_file *m, const unsigned long flags,
16 const char *const *flag_name, int flag_name_count)
17 {
18 bool sep = false;
19 int i;
20
21 for_each_set_bit(i, &flags, BITS_PER_LONG) {
22 if (sep)
23 seq_puts(m, "|");
24 sep = true;
25 if (i < flag_name_count && flag_name[i])
26 seq_puts(m, flag_name[i]);
27 else
28 seq_printf(m, "%d", i);
29 }
30 return 0;
31 }
32
scsi_show_rq(struct seq_file * m,struct request * rq)33 void scsi_show_rq(struct seq_file *m, struct request *rq)
34 {
35 struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
36 int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc);
37 int timeout_ms = jiffies_to_msecs(rq->timeout);
38 const u8 *const cdb = READ_ONCE(cmd->cmnd);
39 char buf[80] = "(?)";
40
41 if (cdb)
42 __scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len);
43 seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf,
44 cmd->retries, cmd->result);
45 scsi_flags_show(m, cmd->flags, scsi_cmd_flags,
46 ARRAY_SIZE(scsi_cmd_flags));
47 seq_printf(m, ", .timeout=%d.%03d, allocated %d.%03d s ago",
48 timeout_ms / 1000, timeout_ms % 1000,
49 alloc_ms / 1000, alloc_ms % 1000);
50 }
51