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 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 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