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