1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/seq_file.h> 3 #include <scsi/scsi_cmnd.h> 4 #include <scsi/scsi_dbg.h> 5 #include "scsi_debugfs.h" 6 7 #define SCSI_CMD_FLAG_NAME(name) [ilog2(SCMD_##name)] = #name 8 static const char *const scsi_cmd_flags[] = { 9 SCSI_CMD_FLAG_NAME(TAGGED), 10 SCSI_CMD_FLAG_NAME(UNCHECKED_ISA_DMA), 11 SCSI_CMD_FLAG_NAME(ZONE_WRITE_LOCK), 12 SCSI_CMD_FLAG_NAME(INITIALIZED), 13 }; 14 #undef SCSI_CMD_FLAG_NAME 15 16 static int scsi_flags_show(struct seq_file *m, const unsigned long flags, 17 const char *const *flag_name, int flag_name_count) 18 { 19 bool sep = false; 20 int i; 21 22 for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { 23 if (!(flags & BIT(i))) 24 continue; 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 void scsi_show_rq(struct seq_file *m, struct request *rq) 37 { 38 struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req); 39 int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc); 40 int timeout_ms = jiffies_to_msecs(rq->timeout); 41 const u8 *const cdb = READ_ONCE(cmd->cmnd); 42 char buf[80] = "(?)"; 43 44 if (cdb) 45 __scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len); 46 seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf, 47 cmd->retries, cmd->result); 48 scsi_flags_show(m, cmd->flags, scsi_cmd_flags, 49 ARRAY_SIZE(scsi_cmd_flags)); 50 seq_printf(m, ", .timeout=%d.%03d, allocated %d.%03d s ago", 51 timeout_ms / 1000, timeout_ms % 1000, 52 alloc_ms / 1000, alloc_ms % 1000); 53 } 54