block/null_blk/trace.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * null_blk device driver tracepoints.
0004  *
0005  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
0006  */
0007
0008 #undef TRACE_SYSTEM
0009 #define TRACE_SYSTEM nullb
0010
0011 #if !defined(_TRACE_NULLB_H) || defined(TRACE_HEADER_MULTI_READ)
0012 #define _TRACE_NULLB_H
0013
0014 #include <linux/tracepoint.h>
0015 #include <linux/trace_seq.h>
0016
0017 #include "null_blk.h"
0018
0019 const char *nullb_trace_disk_name(struct trace_seq *p, char *name);
0020
0021 #define __print_disk_name(name) nullb_trace_disk_name(p, name)
0022
0023 #ifndef TRACE_HEADER_MULTI_READ
0024 static inline void __assign_disk_name(char *name, struct gendisk *disk)
0025 {
0026     if (disk)
0027         memcpy(name, disk->disk_name, DISK_NAME_LEN);
0028     else
0029         memset(name, 0, DISK_NAME_LEN);
0030 }
0031 #endif
0032
0033 TRACE_EVENT(nullb_zone_op,
0034         TP_PROTO(struct nullb_cmd *cmd, unsigned int zone_no,
0035              unsigned int zone_cond),
0036         TP_ARGS(cmd, zone_no, zone_cond),
0037         TP_STRUCT__entry(
0038         __array(char, disk, DISK_NAME_LEN)
0039         __field(enum req_op, op)
0040         __field(unsigned int, zone_no)
0041         __field(unsigned int, zone_cond)
0042         ),
0043         TP_fast_assign(
0044         __entry->op = req_op(cmd->rq);
0045         __entry->zone_no = zone_no;
0046         __entry->zone_cond = zone_cond;
0047         __assign_disk_name(__entry->disk, cmd->rq->q->disk);
0048         ),
0049         TP_printk("%s req=%-15s zone_no=%u zone_cond=%-10s",
0050               __print_disk_name(__entry->disk),
0051               blk_op_str(__entry->op),
0052               __entry->zone_no,
0053               blk_zone_cond_str(__entry->zone_cond))
0054 );
0055
0056 TRACE_EVENT(nullb_report_zones,
0057         TP_PROTO(struct nullb *nullb, unsigned int nr_zones),
0058         TP_ARGS(nullb, nr_zones),
0059         TP_STRUCT__entry(
0060         __array(char, disk, DISK_NAME_LEN)
0061         __field(unsigned int, nr_zones)
0062         ),
0063         TP_fast_assign(
0064         __entry->nr_zones = nr_zones;
0065         __assign_disk_name(__entry->disk, nullb->disk);
0066         ),
0067         TP_printk("%s nr_zones=%u",
0068               __print_disk_name(__entry->disk), __entry->nr_zones)
0069 );
0070
0071 #endif /* _TRACE_NULLB_H */
0072
0073 #undef TRACE_INCLUDE_PATH
0074 #define TRACE_INCLUDE_PATH .
0075 #undef TRACE_INCLUDE_FILE
0076 #define TRACE_INCLUDE_FILE trace
0077
0078 /* This part must be outside protection */
0079 #include <trace/define_trace.h>