xref: /openbmc/linux/drivers/scsi/scsi_debugfs.c (revision 90f359c1)
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