drivers/block/null_blk_trace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * null_blk device driver tracepoints.
   4  *
   5  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
   6  */
   7
   8 #undef TRACE_SYSTEM
   9 #define TRACE_SYSTEM nullb
  10
  11 #if !defined(_TRACE_NULLB_H) || defined(TRACE_HEADER_MULTI_READ)
  12 #define _TRACE_NULLB_H
  13
  14 #include <linux/tracepoint.h>
  15 #include <linux/trace_seq.h>
  16
  17 #include "null_blk.h"
  18
  19 const char *nullb_trace_disk_name(struct trace_seq *p, char *name);
  20
  21 #define __print_disk_name(name) nullb_trace_disk_name(p, name)
  22
  23 #ifndef TRACE_HEADER_MULTI_READ
  24 static inline void __assign_disk_name(char *name, struct gendisk *disk)
  25 {
  26         if (disk)
  27                 memcpy(name, disk->disk_name, DISK_NAME_LEN);
  28         else
  29                 memset(name, 0, DISK_NAME_LEN);
  30 }
  31 #endif
  32
  33 TRACE_EVENT(nullb_zone_op,
  34             TP_PROTO(struct nullb_cmd *cmd, unsigned int zone_no,
  35                      unsigned int zone_cond),
  36             TP_ARGS(cmd, zone_no, zone_cond),
  37             TP_STRUCT__entry(
  38                 __array(char, disk, DISK_NAME_LEN)
  39                 __field(enum req_opf, op)
  40                 __field(unsigned int, zone_no)
  41                 __field(unsigned int, zone_cond)
  42             ),
  43             TP_fast_assign(
  44                 __entry->op = req_op(cmd->rq);
  45                 __entry->zone_no = zone_no;
  46                 __entry->zone_cond = zone_cond;
  47                 __assign_disk_name(__entry->disk, cmd->rq->rq_disk);
  48             ),
  49             TP_printk("%s req=%-15s zone_no=%u zone_cond=%-10s",
  50                       __print_disk_name(__entry->disk),
  51                       blk_op_str(__entry->op),
  52                       __entry->zone_no,
  53                       blk_zone_cond_str(__entry->zone_cond))
  54 );
  55
  56 TRACE_EVENT(nullb_report_zones,
  57             TP_PROTO(struct nullb *nullb, unsigned int nr_zones),
  58             TP_ARGS(nullb, nr_zones),
  59             TP_STRUCT__entry(
  60                 __array(char, disk, DISK_NAME_LEN)
  61                 __field(unsigned int, nr_zones)
  62             ),
  63             TP_fast_assign(
  64                 __entry->nr_zones = nr_zones;
  65                 __assign_disk_name(__entry->disk, nullb->disk);
  66             ),
  67             TP_printk("%s nr_zones=%u",
  68                       __print_disk_name(__entry->disk), __entry->nr_zones)
  69 );
  70
  71 #endif /* _TRACE_NULLB_H */
  72
  73 #undef TRACE_INCLUDE_PATH
  74 #define TRACE_INCLUDE_PATH .
  75 #undef TRACE_INCLUDE_FILE
  76 #define TRACE_INCLUDE_FILE null_blk_trace
  77
  78 /* This part must be outside protection */
  79 #include <trace/define_trace.h>