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 /* 40 * __field() uses is_signed_type(). is_signed_type() does not 41 * support bitwise types. Use __field_struct() instead because 42 * it does not use is_signed_type(). 43 */ 44 __field_struct(enum req_op, op) 45 __field(unsigned int, zone_no) 46 __field(unsigned int, zone_cond) 47 ), 48 TP_fast_assign( 49 __entry->op = req_op(blk_mq_rq_from_pdu(cmd)); 50 __entry->zone_no = zone_no; 51 __entry->zone_cond = zone_cond; 52 __assign_disk_name(__entry->disk, 53 blk_mq_rq_from_pdu(cmd)->q->disk); 54 ), 55 TP_printk("%s req=%-15s zone_no=%u zone_cond=%-10s", 56 __print_disk_name(__entry->disk), 57 blk_op_str(__entry->op), 58 __entry->zone_no, 59 blk_zone_cond_str(__entry->zone_cond)) 60 ); 61 62 TRACE_EVENT(nullb_report_zones, 63 TP_PROTO(struct nullb *nullb, unsigned int nr_zones), 64 TP_ARGS(nullb, nr_zones), 65 TP_STRUCT__entry( 66 __array(char, disk, DISK_NAME_LEN) 67 __field(unsigned int, nr_zones) 68 ), 69 TP_fast_assign( 70 __entry->nr_zones = nr_zones; 71 __assign_disk_name(__entry->disk, nullb->disk); 72 ), 73 TP_printk("%s nr_zones=%u", 74 __print_disk_name(__entry->disk), __entry->nr_zones) 75 ); 76 77 #endif /* _TRACE_NULLB_H */ 78 79 #undef TRACE_INCLUDE_PATH 80 #define TRACE_INCLUDE_PATH . 81 #undef TRACE_INCLUDE_FILE 82 #define TRACE_INCLUDE_FILE trace 83 84 /* This part must be outside protection */ 85 #include <trace/define_trace.h> 86