LXR linux/drivers/scsi/scsi

   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_debugfs.h"
   7
   8#define SCSI_CMD_FLAG_NAME(name)[const_ilog2(SCMD_##name)] = #name
   9static const char *const scsi_cmd_flags[] = {
  10        SCSI_CMD_FLAG_NAME(TAGGED),
  11        SCSI_CMD_FLAG_NAME(UNCHECKED_ISA_DMA),
  12        SCSI_CMD_FLAG_NAME(INITIALIZED),
  13};
  14#undef SCSI_CMD_FLAG_NAME
  15
  16static 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_each_set_bit(i, &flags, BITS_PER_LONG) {
  23                if (sep)
  24                        seq_puts(m, "|");
  25                sep = true;
  26                if (i < flag_name_count && flag_name[i])
  27                        seq_puts(m, flag_name[i]);
  28                else
  29                        seq_printf(m, "%d", i);
  30        }
  31        return 0;
  32}
  33
  34void scsi_show_rq(struct seq_file *m, struct request *rq)
  35{
  36        struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
  37        int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc);
  38        int timeout_ms = jiffies_to_msecs(rq->timeout);
  39        const u8 *const cdb = READ_ONCE(cmd->cmnd);
  40        char buf[80] = "(?)";
  41
  42        if (cdb)
  43                __scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len);
  44        seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf,
  45                   cmd->retries, cmd->result);
  46        scsi_flags_show(m, cmd->flags, scsi_cmd_flags,
  47                        ARRAY_SIZE(scsi_cmd_flags));
  48        seq_printf(m, ", .timeout=%d.%03d, allocated %d.%03d s ago",
  49                   timeout_ms / 1000, timeout_ms % 1000,
  50                   alloc_ms / 1000, alloc_ms % 1000);
  51}
  52