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 11 static 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 18 static 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, "|"); 27 sep = true; 28 if (i < flag_name_count && flag_name[i]) 29 seq_puts(m, flag_name[i]); 30 else 31 seq_printf(m, "%d", i); 32 } 33 return 0; 34 } 35 36 static 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)(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 54 void 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(jiffies - cmd->jiffies_at_alloc); 58 int timeout_ms = jiffies_to_msecs(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, ", .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, ", .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, ", .flags="); 73 scsi_flags_show(m, cmd->flags, scsi_cmd_flags, 74 ARRAY_SIZE(scsi_cmd_flags)); 75 } 76