1// SPDX-License-Identifier: GPL-2.0
2#include <linux/bitops.h>
3#include <linux/cleanup.h>
4#include <linux/seq_file.h>
5#include <scsi/scsi_cmnd.h>
6#include <scsi/scsi_dbg.h>
7#include <scsi/scsi_host.h>
8#include "scsi_debugfs.h"
9
10#define SCSI_CMD_FLAG_NAME(name)[const_ilog2(SCMD_##name)] = #name
11static const char *const scsi_cmd_flags[] = {
12 SCSI_CMD_FLAG_NAME(TAGGED),
13 SCSI_CMD_FLAG_NAME(INITIALIZED),
14 SCSI_CMD_FLAG_NAME(LAST),
15};
16#undef SCSI_CMD_FLAG_NAME
17
18static int scsi_flags_show(struct seq_file *m, const unsigned long flags,
19 const char *const *flag_name, int flag_name_count)
20{
21 bool sep = false;
22 int i;
23
24 for_each_set_bit(i, &flags, BITS_PER_LONG) {
25 if (sep)
26 seq_puts(m, s: "|");
27 sep = true;
28 if (i < flag_name_count && flag_name[i])
29 seq_puts(m, s: flag_name[i]);
30 else
31 seq_printf(m, fmt: "%d", i);
32 }
33 return 0;
34}
35
36static const char *scsi_cmd_list_info(struct scsi_cmnd *cmd)
37{
38 struct Scsi_Host *shost = cmd->device->host;
39 struct scsi_cmnd *cmd2;
40
41 guard(spinlock_irq)(l: shost->host_lock);
42
43 list_for_each_entry(cmd2, &shost->eh_abort_list, eh_entry)
44 if (cmd == cmd2)
45 return "on eh_abort_list";
46
47 list_for_each_entry(cmd2, &shost->eh_cmd_q, eh_entry)
48 if (cmd == cmd2)
49 return "on eh_cmd_q";
50
51 return NULL;
52}
53
54void scsi_show_rq(struct seq_file *m, struct request *rq)
55{
56 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
57 int alloc_ms = jiffies_to_msecs(j: jiffies - cmd->jiffies_at_alloc);
58 int timeout_ms = jiffies_to_msecs(j: rq->timeout);
59 char buf[80] = "(?)";
60
61 if (cmd->flags & SCMD_INITIALIZED) {
62 const char *list_info = scsi_cmd_list_info(cmd);
63
64 __scsi_format_command(buf, sizeof(buf), cmd->cmnd, cmd->cmd_len);
65 seq_printf(m, fmt: ", .cmd=%s, .retries=%d, .allowed=%d, .result = %#x%s%s",
66 buf, cmd->retries, cmd->allowed, cmd->result,
67 list_info ? ", " : "", list_info ? : "");
68 seq_printf(m, fmt: ", .timeout=%d.%03d, allocated %d.%03d s ago",
69 timeout_ms / 1000, timeout_ms % 1000,
70 alloc_ms / 1000, alloc_ms % 1000);
71 }
72 seq_printf(m, fmt: ", .flags=");
73 scsi_flags_show(m, flags: cmd->flags, flag_name: scsi_cmd_flags,
74 ARRAY_SIZE(scsi_cmd_flags));
75}
76

source code of linux/drivers/scsi/scsi_debugfs.c