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 trace 77 78 /* This part must be outside protection */ 79 #include <trace/define_trace.h> 80