Tom Zanussi | bac5fb9 | 2013-10-24 08:59:29 -0500 | [diff] [blame] | 1 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 2 | #ifndef _LINUX_TRACE_EVENT_H |
| 3 | #define _LINUX_TRACE_EVENT_H |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 4 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 5 | #include <linux/ring_buffer.h> |
Steven Rostedt | 16bb8eb | 2009-09-12 19:04:54 -0400 | [diff] [blame] | 6 | #include <linux/trace_seq.h> |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 7 | #include <linux/percpu.h> |
Frederic Weisbecker | 20ab4425 | 2009-09-18 06:10:28 +0200 | [diff] [blame] | 8 | #include <linux/hardirq.h> |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 9 | #include <linux/perf_event.h> |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 10 | #include <linux/tracepoint.h> |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 11 | |
| 12 | struct trace_array; |
Steven Rostedt (Red Hat) | 12883ef | 2013-03-05 09:24:35 -0500 | [diff] [blame] | 13 | struct trace_buffer; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 14 | struct tracer; |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 15 | struct dentry; |
Alexei Starovoitov | 2541517 | 2015-03-25 12:49:20 -0700 | [diff] [blame] | 16 | struct bpf_prog; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 17 | |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 18 | struct trace_print_flags { |
| 19 | unsigned long mask; |
| 20 | const char *name; |
| 21 | }; |
| 22 | |
liubo | 2fc1b6f | 2011-04-19 09:35:28 +0800 | [diff] [blame] | 23 | struct trace_print_flags_u64 { |
| 24 | unsigned long long mask; |
| 25 | const char *name; |
| 26 | }; |
| 27 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 28 | const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, |
| 29 | unsigned long flags, |
| 30 | const struct trace_print_flags *flag_array); |
Steven Rostedt | be74b73 | 2009-05-26 20:25:22 +0200 | [diff] [blame] | 31 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 32 | const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
| 33 | const struct trace_print_flags *symbol_array); |
Steven Rostedt | 0f4fc29 | 2009-05-20 19:21:47 -0400 | [diff] [blame] | 34 | |
liubo | 2fc1b6f | 2011-04-19 09:35:28 +0800 | [diff] [blame] | 35 | #if BITS_PER_LONG == 32 |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 36 | const char *trace_print_symbols_seq_u64(struct trace_seq *p, |
| 37 | unsigned long long val, |
| 38 | const struct trace_print_flags_u64 |
liubo | 2fc1b6f | 2011-04-19 09:35:28 +0800 | [diff] [blame] | 39 | *symbol_array); |
| 40 | #endif |
| 41 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 42 | const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
| 43 | unsigned int bitmask_size); |
Steven Rostedt (Red Hat) | 4449bf9 | 2014-05-06 13:10:24 -0400 | [diff] [blame] | 44 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 45 | const char *trace_print_hex_seq(struct trace_seq *p, |
| 46 | const unsigned char *buf, int len); |
Kei Tokunaga | 5a2e399 | 2010-04-01 20:40:58 +0900 | [diff] [blame] | 47 | |
Steven Rostedt (Red Hat) | 645df98 | 2015-05-04 18:12:44 -0400 | [diff] [blame] | 48 | const char *trace_print_array_seq(struct trace_seq *p, |
Alex Bennée | ac01ce1 | 2015-04-29 16:18:46 +0100 | [diff] [blame] | 49 | const void *buf, int count, |
Dave Martin | 6ea2248 | 2015-01-28 12:48:53 +0000 | [diff] [blame] | 50 | size_t el_size); |
| 51 | |
Li Zefan | f71130d | 2013-02-21 10:32:38 +0800 | [diff] [blame] | 52 | struct trace_iterator; |
| 53 | struct trace_event; |
| 54 | |
Steven Rostedt (Red Hat) | 892c505 | 2015-05-05 14:18:11 -0400 | [diff] [blame] | 55 | int trace_raw_output_prep(struct trace_iterator *iter, |
| 56 | struct trace_event *event); |
Li Zefan | f71130d | 2013-02-21 10:32:38 +0800 | [diff] [blame] | 57 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 58 | /* |
| 59 | * The trace entry - the most basic unit of tracing. This is what |
| 60 | * is printed in the end as a single line in the trace output, such as: |
| 61 | * |
| 62 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter |
| 63 | */ |
| 64 | struct trace_entry { |
Steven Rostedt | 89ec0de | 2009-03-26 11:03:29 -0400 | [diff] [blame] | 65 | unsigned short type; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 66 | unsigned char flags; |
| 67 | unsigned char preempt_count; |
| 68 | int pid; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 69 | }; |
| 70 | |
Steven Rostedt (Red Hat) | 609a740 | 2015-05-13 13:44:36 -0400 | [diff] [blame] | 71 | #define TRACE_EVENT_TYPE_MAX \ |
Steven Rostedt | 89ec0de | 2009-03-26 11:03:29 -0400 | [diff] [blame] | 72 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
| 73 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 74 | /* |
| 75 | * Trace iterator - used by printout routines who present trace |
| 76 | * results to users and which routines might sleep, etc: |
| 77 | */ |
| 78 | struct trace_iterator { |
| 79 | struct trace_array *tr; |
| 80 | struct tracer *trace; |
Steven Rostedt (Red Hat) | 12883ef | 2013-03-05 09:24:35 -0500 | [diff] [blame] | 81 | struct trace_buffer *trace_buffer; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 82 | void *private; |
| 83 | int cpu_file; |
| 84 | struct mutex mutex; |
Steven Rostedt | 6d158a8 | 2012-06-27 20:46:14 -0400 | [diff] [blame] | 85 | struct ring_buffer_iter **buffer_iter; |
Steven Rostedt | 112f38a7 | 2009-06-01 15:16:05 -0400 | [diff] [blame] | 86 | unsigned long iter_flags; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 87 | |
Lai Jiangshan | bc289ae | 2010-06-03 18:26:24 +0800 | [diff] [blame] | 88 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
| 89 | struct trace_seq tmp_seq; |
| 90 | |
Andrew Vagin | ed5467d | 2013-08-02 21:16:43 +0400 | [diff] [blame] | 91 | cpumask_var_t started; |
| 92 | |
| 93 | /* it's true when current open file is snapshot */ |
| 94 | bool snapshot; |
| 95 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 96 | /* The below is zeroed out in pipe_read */ |
| 97 | struct trace_seq seq; |
| 98 | struct trace_entry *ent; |
Steven Rostedt | bc21b47 | 2010-03-31 19:49:26 -0400 | [diff] [blame] | 99 | unsigned long lost_events; |
Steven Rostedt | a63ce5b | 2009-12-07 09:11:39 -0500 | [diff] [blame] | 100 | int leftover; |
Steven Rostedt | 4a9bd3f | 2011-07-14 16:36:53 -0400 | [diff] [blame] | 101 | int ent_size; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 102 | int cpu; |
| 103 | u64 ts; |
| 104 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 105 | loff_t pos; |
| 106 | long idx; |
| 107 | |
Andrew Vagin | ed5467d | 2013-08-02 21:16:43 +0400 | [diff] [blame] | 108 | /* All new field here will be zeroed out in pipe_read */ |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 109 | }; |
| 110 | |
David Sharp | 8be0709 | 2012-11-13 12:18:22 -0800 | [diff] [blame] | 111 | enum trace_iter_flags { |
| 112 | TRACE_FILE_LAT_FMT = 1, |
| 113 | TRACE_FILE_ANNOTATE = 2, |
| 114 | TRACE_FILE_TIME_IN_NS = 4, |
| 115 | }; |
| 116 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 117 | |
| 118 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, |
Steven Rostedt | a9a5776 | 2010-04-22 18:46:14 -0400 | [diff] [blame] | 119 | int flags, struct trace_event *event); |
| 120 | |
| 121 | struct trace_event_functions { |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 122 | trace_print_func trace; |
| 123 | trace_print_func raw; |
| 124 | trace_print_func hex; |
| 125 | trace_print_func binary; |
| 126 | }; |
| 127 | |
Steven Rostedt | a9a5776 | 2010-04-22 18:46:14 -0400 | [diff] [blame] | 128 | struct trace_event { |
| 129 | struct hlist_node node; |
| 130 | struct list_head list; |
| 131 | int type; |
| 132 | struct trace_event_functions *funcs; |
| 133 | }; |
| 134 | |
Steven Rostedt (Red Hat) | 9023c93 | 2015-05-05 09:39:12 -0400 | [diff] [blame] | 135 | extern int register_trace_event(struct trace_event *event); |
| 136 | extern int unregister_trace_event(struct trace_event *event); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 137 | |
| 138 | /* Return values for print_line callback */ |
| 139 | enum print_line_t { |
| 140 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ |
| 141 | TRACE_TYPE_HANDLED = 1, |
| 142 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ |
| 143 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ |
| 144 | }; |
| 145 | |
Steven Rostedt (Red Hat) | 19a7fe2 | 2014-11-12 10:29:54 -0500 | [diff] [blame] | 146 | /* |
| 147 | * Several functions return TRACE_TYPE_PARTIAL_LINE if the trace_seq |
| 148 | * overflowed, and TRACE_TYPE_HANDLED otherwise. This helper function |
| 149 | * simplifies those functions and keeps them in sync. |
| 150 | */ |
| 151 | static inline enum print_line_t trace_handle_return(struct trace_seq *s) |
| 152 | { |
| 153 | return trace_seq_has_overflowed(s) ? |
| 154 | TRACE_TYPE_PARTIAL_LINE : TRACE_TYPE_HANDLED; |
| 155 | } |
| 156 | |
Frederic Weisbecker | f413cdb | 2009-08-07 01:25:54 +0200 | [diff] [blame] | 157 | void tracing_generic_entry_update(struct trace_entry *entry, |
| 158 | unsigned long flags, |
| 159 | int pc); |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 160 | struct trace_event_file; |
Steven Rostedt | ccb469a | 2012-08-02 10:32:10 -0400 | [diff] [blame] | 161 | |
| 162 | struct ring_buffer_event * |
| 163 | trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer, |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 164 | struct trace_event_file *trace_file, |
Steven Rostedt | ccb469a | 2012-08-02 10:32:10 -0400 | [diff] [blame] | 165 | int type, unsigned long len, |
| 166 | unsigned long flags, int pc); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 167 | struct ring_buffer_event * |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 168 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
| 169 | int type, unsigned long len, |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 170 | unsigned long flags, int pc); |
Steven Rostedt (Red Hat) | b7f0c95 | 2015-09-25 17:38:44 -0400 | [diff] [blame] | 171 | void trace_buffer_unlock_commit(struct trace_array *tr, |
| 172 | struct ring_buffer *buffer, |
Steven Rostedt | 0d5c6e1 | 2012-11-01 20:54:21 -0400 | [diff] [blame] | 173 | struct ring_buffer_event *event, |
| 174 | unsigned long flags, int pc); |
Steven Rostedt (Red Hat) | b7f0c95 | 2015-09-25 17:38:44 -0400 | [diff] [blame] | 175 | void trace_buffer_unlock_commit_regs(struct trace_array *tr, |
| 176 | struct ring_buffer *buffer, |
Steven Rostedt | 0d5c6e1 | 2012-11-01 20:54:21 -0400 | [diff] [blame] | 177 | struct ring_buffer_event *event, |
| 178 | unsigned long flags, int pc, |
| 179 | struct pt_regs *regs); |
Steven Rostedt | e77405a | 2009-09-02 14:17:06 -0400 | [diff] [blame] | 180 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
| 181 | struct ring_buffer_event *event); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 182 | |
| 183 | void tracing_record_cmdline(struct task_struct *tsk); |
| 184 | |
Steven Rostedt (Red Hat) | 892c505 | 2015-05-05 14:18:11 -0400 | [diff] [blame] | 185 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
Steven Rostedt | 1d6bae9 | 2012-08-09 19:16:14 -0400 | [diff] [blame] | 186 | |
Li Zefan | 1f9963c | 2009-07-20 10:20:53 +0800 | [diff] [blame] | 187 | struct event_filter; |
| 188 | |
Steven Rostedt | 2239291 | 2010-04-21 12:27:06 -0400 | [diff] [blame] | 189 | enum trace_reg { |
| 190 | TRACE_REG_REGISTER, |
| 191 | TRACE_REG_UNREGISTER, |
Jiri Olsa | 37d7399 | 2012-03-14 00:03:02 +0100 | [diff] [blame] | 192 | #ifdef CONFIG_PERF_EVENTS |
Steven Rostedt | 2239291 | 2010-04-21 12:27:06 -0400 | [diff] [blame] | 193 | TRACE_REG_PERF_REGISTER, |
| 194 | TRACE_REG_PERF_UNREGISTER, |
Jiri Olsa | ceec0b6 | 2012-02-15 15:51:49 +0100 | [diff] [blame] | 195 | TRACE_REG_PERF_OPEN, |
| 196 | TRACE_REG_PERF_CLOSE, |
Jiri Olsa | 489c75c | 2012-02-15 15:51:50 +0100 | [diff] [blame] | 197 | TRACE_REG_PERF_ADD, |
| 198 | TRACE_REG_PERF_DEL, |
Jiri Olsa | 37d7399 | 2012-03-14 00:03:02 +0100 | [diff] [blame] | 199 | #endif |
Steven Rostedt | 2239291 | 2010-04-21 12:27:06 -0400 | [diff] [blame] | 200 | }; |
| 201 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 202 | struct trace_event_call; |
Steven Rostedt | 2239291 | 2010-04-21 12:27:06 -0400 | [diff] [blame] | 203 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 204 | struct trace_event_class { |
Steven Rostedt (Red Hat) | acd388f | 2015-03-31 14:37:12 -0400 | [diff] [blame] | 205 | const char *system; |
Steven Rostedt | 2239291 | 2010-04-21 12:27:06 -0400 | [diff] [blame] | 206 | void *probe; |
| 207 | #ifdef CONFIG_PERF_EVENTS |
| 208 | void *perf_probe; |
| 209 | #endif |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 210 | int (*reg)(struct trace_event_call *event, |
Jiri Olsa | ceec0b6 | 2012-02-15 15:51:49 +0100 | [diff] [blame] | 211 | enum trace_reg type, void *data); |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 212 | int (*define_fields)(struct trace_event_call *); |
| 213 | struct list_head *(*get_fields)(struct trace_event_call *); |
Steven Rostedt | 2e33af0 | 2010-04-22 10:35:55 -0400 | [diff] [blame] | 214 | struct list_head fields; |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 215 | int (*raw_init)(struct trace_event_call *); |
Steven Rostedt | 8f08201 | 2010-04-20 10:47:33 -0400 | [diff] [blame] | 216 | }; |
| 217 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 218 | extern int trace_event_reg(struct trace_event_call *event, |
Jiri Olsa | ceec0b6 | 2012-02-15 15:51:49 +0100 | [diff] [blame] | 219 | enum trace_reg type, void *data); |
Steven Rostedt | a1d0ce8 | 2010-06-08 11:22:06 -0400 | [diff] [blame] | 220 | |
Steven Rostedt (Red Hat) | 3f795dc | 2015-05-05 13:18:46 -0400 | [diff] [blame] | 221 | struct trace_event_buffer { |
Steven Rostedt | 3fd40d1 | 2012-08-09 22:42:57 -0400 | [diff] [blame] | 222 | struct ring_buffer *buffer; |
| 223 | struct ring_buffer_event *event; |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 224 | struct trace_event_file *trace_file; |
Steven Rostedt | 3fd40d1 | 2012-08-09 22:42:57 -0400 | [diff] [blame] | 225 | void *entry; |
| 226 | unsigned long flags; |
| 227 | int pc; |
| 228 | }; |
| 229 | |
Steven Rostedt (Red Hat) | 3f795dc | 2015-05-05 13:18:46 -0400 | [diff] [blame] | 230 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 231 | struct trace_event_file *trace_file, |
Steven Rostedt | 3fd40d1 | 2012-08-09 22:42:57 -0400 | [diff] [blame] | 232 | unsigned long len); |
| 233 | |
Steven Rostedt (Red Hat) | 3f795dc | 2015-05-05 13:18:46 -0400 | [diff] [blame] | 234 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
Steven Rostedt | 3fd40d1 | 2012-08-09 22:42:57 -0400 | [diff] [blame] | 235 | |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 236 | enum { |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 237 | TRACE_EVENT_FL_FILTERED_BIT, |
Frederic Weisbecker | 61c3265 | 2010-11-18 01:39:17 +0100 | [diff] [blame] | 238 | TRACE_EVENT_FL_CAP_ANY_BIT, |
Li Zefan | 27b14b5 | 2011-11-01 09:09:35 +0800 | [diff] [blame] | 239 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
Steven Rostedt | 9b63776 | 2012-05-10 15:55:43 -0400 | [diff] [blame] | 240 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
Steven Rostedt (Red Hat) | 575380d | 2013-03-04 23:05:12 -0500 | [diff] [blame] | 241 | TRACE_EVENT_FL_WAS_ENABLED_BIT, |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 242 | TRACE_EVENT_FL_USE_CALL_FILTER_BIT, |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 243 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
Alexei Starovoitov | 72cbbc8 | 2015-03-25 12:49:19 -0700 | [diff] [blame] | 244 | TRACE_EVENT_FL_KPROBE_BIT, |
Wang Nan | 04a22fa | 2015-07-01 02:13:50 +0000 | [diff] [blame] | 245 | TRACE_EVENT_FL_UPROBE_BIT, |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 246 | }; |
| 247 | |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 248 | /* |
| 249 | * Event flags: |
| 250 | * FILTERED - The event has a filter attached |
| 251 | * CAP_ANY - Any user can enable for perf |
| 252 | * NO_SET_FILTER - Set when filter has error and is to be ignored |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 253 | * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file |
Steven Rostedt (Red Hat) | 575380d | 2013-03-04 23:05:12 -0500 | [diff] [blame] | 254 | * WAS_ENABLED - Set and stays set when an event was ever enabled |
| 255 | * (used for module unloading, if a module event is enabled, |
| 256 | * it is best to clear the buffers that used it). |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 257 | * USE_CALL_FILTER - For trace internal events, don't use file filter |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 258 | * TRACEPOINT - Event is a tracepoint |
Alexei Starovoitov | 72cbbc8 | 2015-03-25 12:49:19 -0700 | [diff] [blame] | 259 | * KPROBE - Event is a kprobe |
Wang Nan | 04a22fa | 2015-07-01 02:13:50 +0000 | [diff] [blame] | 260 | * UPROBE - Event is a uprobe |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 261 | */ |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 262 | enum { |
Li Zefan | e870e9a | 2010-07-02 11:07:32 +0800 | [diff] [blame] | 263 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
Frederic Weisbecker | 61c3265 | 2010-11-18 01:39:17 +0100 | [diff] [blame] | 264 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
Li Zefan | 27b14b5 | 2011-11-01 09:09:35 +0800 | [diff] [blame] | 265 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
Steven Rostedt | 9b63776 | 2012-05-10 15:55:43 -0400 | [diff] [blame] | 266 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
Steven Rostedt (Red Hat) | 575380d | 2013-03-04 23:05:12 -0500 | [diff] [blame] | 267 | TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT), |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 268 | TRACE_EVENT_FL_USE_CALL_FILTER = (1 << TRACE_EVENT_FL_USE_CALL_FILTER_BIT), |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 269 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
Alexei Starovoitov | 72cbbc8 | 2015-03-25 12:49:19 -0700 | [diff] [blame] | 270 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
Wang Nan | 04a22fa | 2015-07-01 02:13:50 +0000 | [diff] [blame] | 271 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 272 | }; |
| 273 | |
Wang Nan | 04a22fa | 2015-07-01 02:13:50 +0000 | [diff] [blame] | 274 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
| 275 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 276 | struct trace_event_call { |
Steven Rostedt | a59fd60 | 2009-04-10 13:52:20 -0400 | [diff] [blame] | 277 | struct list_head list; |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 278 | struct trace_event_class *class; |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 279 | union { |
| 280 | char *name; |
| 281 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ |
| 282 | struct tracepoint *tp; |
| 283 | }; |
Steven Rostedt | 80decc7 | 2010-04-23 10:00:22 -0400 | [diff] [blame] | 284 | struct trace_event event; |
Steven Rostedt (Red Hat) | 0c564a5 | 2015-03-24 17:58:09 -0400 | [diff] [blame] | 285 | char *print_fmt; |
Li Zefan | 1f9963c | 2009-07-20 10:20:53 +0800 | [diff] [blame] | 286 | struct event_filter *filter; |
Steven Rostedt | 6d72373 | 2009-04-10 14:53:50 -0400 | [diff] [blame] | 287 | void *mod; |
Jason Baron | 69fd4f0 | 2009-08-10 16:52:44 -0400 | [diff] [blame] | 288 | void *data; |
Steven Rostedt (Red Hat) | 57d01ad | 2013-03-12 12:38:06 -0400 | [diff] [blame] | 289 | /* |
| 290 | * bit 0: filter_active |
| 291 | * bit 1: allow trace by non root (cap any) |
| 292 | * bit 2: failed to apply filter |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 293 | * bit 3: trace internal event (do not enable) |
Steven Rostedt (Red Hat) | 57d01ad | 2013-03-12 12:38:06 -0400 | [diff] [blame] | 294 | * bit 4: Event was enabled by module |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 295 | * bit 5: use call filter rather than file filter |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 296 | * bit 6: Event is a tracepoint |
Steven Rostedt (Red Hat) | 57d01ad | 2013-03-12 12:38:06 -0400 | [diff] [blame] | 297 | */ |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 298 | int flags; /* static flags of different events */ |
| 299 | |
| 300 | #ifdef CONFIG_PERF_EVENTS |
| 301 | int perf_refcount; |
| 302 | struct hlist_head __percpu *perf_events; |
Alexei Starovoitov | 2541517 | 2015-03-25 12:49:20 -0700 | [diff] [blame] | 303 | struct bpf_prog *prog; |
Peter Zijlstra | d5b5f39 | 2013-11-14 16:23:04 +0100 | [diff] [blame] | 304 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 305 | int (*perf_perm)(struct trace_event_call *, |
Peter Zijlstra | d5b5f39 | 2013-11-14 16:23:04 +0100 | [diff] [blame] | 306 | struct perf_event *); |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 307 | #endif |
| 308 | }; |
| 309 | |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 310 | static inline const char * |
Steven Rostedt (Red Hat) | 687fcc4 | 2015-05-13 14:20:14 -0400 | [diff] [blame] | 311 | trace_event_name(struct trace_event_call *call) |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 312 | { |
| 313 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) |
| 314 | return call->tp ? call->tp->name : NULL; |
| 315 | else |
| 316 | return call->name; |
| 317 | } |
| 318 | |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 319 | struct trace_array; |
Steven Rostedt (Red Hat) | 7967b3e | 2015-05-13 14:59:40 -0400 | [diff] [blame] | 320 | struct trace_subsystem_dir; |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 321 | |
| 322 | enum { |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 323 | EVENT_FILE_FL_ENABLED_BIT, |
| 324 | EVENT_FILE_FL_RECORDED_CMD_BIT, |
| 325 | EVENT_FILE_FL_FILTERED_BIT, |
| 326 | EVENT_FILE_FL_NO_SET_FILTER_BIT, |
| 327 | EVENT_FILE_FL_SOFT_MODE_BIT, |
| 328 | EVENT_FILE_FL_SOFT_DISABLED_BIT, |
| 329 | EVENT_FILE_FL_TRIGGER_MODE_BIT, |
| 330 | EVENT_FILE_FL_TRIGGER_COND_BIT, |
Steven Rostedt (Red Hat) | 3fdaf80 | 2015-09-25 12:58:44 -0400 | [diff] [blame] | 331 | EVENT_FILE_FL_PID_FILTER_BIT, |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 332 | }; |
| 333 | |
| 334 | /* |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 335 | * Event file flags: |
Steven Rostedt (Red Hat) | 57d01ad | 2013-03-12 12:38:06 -0400 | [diff] [blame] | 336 | * ENABLED - The event is enabled |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 337 | * RECORDED_CMD - The comms should be recorded at sched_switch |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 338 | * FILTERED - The event has a filter attached |
| 339 | * NO_SET_FILTER - Set when filter has error and is to be ignored |
Steven Rostedt (Red Hat) | 417944c | 2013-03-12 13:26:18 -0400 | [diff] [blame] | 340 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
| 341 | * SOFT_DISABLED - When set, do not trace the event (even though its |
| 342 | * tracepoint may be enabled) |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 343 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
Tom Zanussi | bac5fb9 | 2013-10-24 08:59:29 -0500 | [diff] [blame] | 344 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
Steven Rostedt (Red Hat) | 3fdaf80 | 2015-09-25 12:58:44 -0400 | [diff] [blame] | 345 | * PID_FILTER - When set, the event is filtered based on pid |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 346 | */ |
| 347 | enum { |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 348 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
| 349 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), |
| 350 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), |
| 351 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), |
| 352 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), |
| 353 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), |
| 354 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), |
| 355 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), |
Steven Rostedt (Red Hat) | 3fdaf80 | 2015-09-25 12:58:44 -0400 | [diff] [blame] | 356 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 357 | }; |
| 358 | |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 359 | struct trace_event_file { |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 360 | struct list_head list; |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 361 | struct trace_event_call *event_call; |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 362 | struct event_filter *filter; |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 363 | struct dentry *dir; |
| 364 | struct trace_array *tr; |
Steven Rostedt (Red Hat) | 7967b3e | 2015-05-13 14:59:40 -0400 | [diff] [blame] | 365 | struct trace_subsystem_dir *system; |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 366 | struct list_head triggers; |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 367 | |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 368 | /* |
| 369 | * 32 bit flags: |
Steven Rostedt (Red Hat) | 57d01ad | 2013-03-12 12:38:06 -0400 | [diff] [blame] | 370 | * bit 0: enabled |
| 371 | * bit 1: enabled cmd record |
Steven Rostedt (Red Hat) | 417944c | 2013-03-12 13:26:18 -0400 | [diff] [blame] | 372 | * bit 2: enable/disable with the soft disable bit |
| 373 | * bit 3: soft disabled |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 374 | * bit 4: trigger enabled |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 375 | * |
Steven Rostedt (Red Hat) | 417944c | 2013-03-12 13:26:18 -0400 | [diff] [blame] | 376 | * Note: The bits must be set atomically to prevent races |
| 377 | * from other writers. Reads of flags do not need to be in |
| 378 | * sync as they occur in critical sections. But the way flags |
Steven Rostedt | ae63b31 | 2012-05-03 23:09:03 -0400 | [diff] [blame] | 379 | * is currently used, these changes do not affect the code |
Steven Rostedt | 1eaa478 | 2010-05-14 10:19:13 -0400 | [diff] [blame] | 380 | * except that when a change is made, it may have a slight |
| 381 | * delay in propagating the changes to other CPUs due to |
Steven Rostedt (Red Hat) | 417944c | 2013-03-12 13:26:18 -0400 | [diff] [blame] | 382 | * caching and such. Which is mostly OK ;-) |
Steven Rostedt | 553552c | 2010-04-23 11:12:36 -0400 | [diff] [blame] | 383 | */ |
Steven Rostedt (Red Hat) | 417944c | 2013-03-12 13:26:18 -0400 | [diff] [blame] | 384 | unsigned long flags; |
Masami Hiramatsu | 1cf4c07 | 2013-05-09 14:44:29 +0900 | [diff] [blame] | 385 | atomic_t sm_ref; /* soft-mode reference counter */ |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 386 | atomic_t tm_ref; /* trigger-mode reference counter */ |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 387 | }; |
| 388 | |
Frederic Weisbecker | 53cf810b | 2010-11-18 02:11:42 +0100 | [diff] [blame] | 389 | #define __TRACE_EVENT_FLAGS(name, value) \ |
| 390 | static int __init trace_init_flags_##name(void) \ |
| 391 | { \ |
Mathieu Desnoyers | de7b297 | 2014-04-08 17:26:21 -0400 | [diff] [blame] | 392 | event_##name.flags |= value; \ |
Frederic Weisbecker | 53cf810b | 2010-11-18 02:11:42 +0100 | [diff] [blame] | 393 | return 0; \ |
| 394 | } \ |
| 395 | early_initcall(trace_init_flags_##name); |
| 396 | |
Peter Zijlstra | d5b5f39 | 2013-11-14 16:23:04 +0100 | [diff] [blame] | 397 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 398 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
Peter Zijlstra | d5b5f39 | 2013-11-14 16:23:04 +0100 | [diff] [blame] | 399 | struct perf_event *p_event) \ |
| 400 | { \ |
| 401 | return ({ expr; }); \ |
| 402 | } \ |
| 403 | static int __init trace_init_perf_perm_##name(void) \ |
| 404 | { \ |
| 405 | event_##name.perf_perm = &perf_perm_##name; \ |
| 406 | return 0; \ |
| 407 | } \ |
| 408 | early_initcall(trace_init_perf_perm_##name); |
| 409 | |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 410 | #define PERF_MAX_TRACE_SIZE 2048 |
Frederic Weisbecker | 20ab4425 | 2009-09-18 06:10:28 +0200 | [diff] [blame] | 411 | |
Steven Rostedt | 16bb8eb | 2009-09-12 19:04:54 -0400 | [diff] [blame] | 412 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 413 | |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 414 | enum event_trigger_type { |
| 415 | ETT_NONE = (0), |
Tom Zanussi | 2a2df32 | 2013-10-24 08:59:25 -0500 | [diff] [blame] | 416 | ETT_TRACE_ONOFF = (1 << 0), |
Tom Zanussi | 93e31ff | 2013-10-24 08:59:26 -0500 | [diff] [blame] | 417 | ETT_SNAPSHOT = (1 << 1), |
Tom Zanussi | f21ecbb | 2013-10-24 08:59:27 -0500 | [diff] [blame] | 418 | ETT_STACKTRACE = (1 << 2), |
Tom Zanussi | 7862ad1 | 2013-10-24 08:59:28 -0500 | [diff] [blame] | 419 | ETT_EVENT_ENABLE = (1 << 3), |
Tom Zanussi | 85f2b08 | 2013-10-24 08:59:24 -0500 | [diff] [blame] | 420 | }; |
| 421 | |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 422 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 423 | |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 424 | extern int filter_check_discard(struct trace_event_file *file, void *rec, |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 425 | struct ring_buffer *buffer, |
| 426 | struct ring_buffer_event *event); |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 427 | extern int call_filter_check_discard(struct trace_event_call *call, void *rec, |
Tom Zanussi | f306cc8 | 2013-10-24 08:34:17 -0500 | [diff] [blame] | 428 | struct ring_buffer *buffer, |
| 429 | struct ring_buffer_event *event); |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 430 | extern enum event_trigger_type event_triggers_call(struct trace_event_file *file, |
Tom Zanussi | bac5fb9 | 2013-10-24 08:59:29 -0500 | [diff] [blame] | 431 | void *rec); |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 432 | extern void event_triggers_post_call(struct trace_event_file *file, |
Tom Zanussi | bac5fb9 | 2013-10-24 08:59:29 -0500 | [diff] [blame] | 433 | enum event_trigger_type tt); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 434 | |
Steven Rostedt (Red Hat) | 3fdaf80 | 2015-09-25 12:58:44 -0400 | [diff] [blame] | 435 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
| 436 | |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 437 | /** |
Steven Rostedt (Red Hat) | 09a5059 | 2015-05-13 15:21:25 -0400 | [diff] [blame] | 438 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 439 | * @file: The file pointer of the event to test |
| 440 | * |
| 441 | * If any triggers without filters are attached to this event, they |
| 442 | * will be called here. If the event is soft disabled and has no |
| 443 | * triggers that require testing the fields, it will return true, |
| 444 | * otherwise false. |
| 445 | */ |
| 446 | static inline bool |
Steven Rostedt (Red Hat) | 09a5059 | 2015-05-13 15:21:25 -0400 | [diff] [blame] | 447 | trace_trigger_soft_disabled(struct trace_event_file *file) |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 448 | { |
| 449 | unsigned long eflags = file->flags; |
| 450 | |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 451 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
| 452 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 453 | event_triggers_call(file, NULL); |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 454 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 455 | return true; |
Steven Rostedt (Red Hat) | 3fdaf80 | 2015-09-25 12:58:44 -0400 | [diff] [blame] | 456 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
| 457 | return trace_event_ignore_this_pid(file); |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 458 | } |
| 459 | return false; |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * Helper function for event_trigger_unlock_commit{_regs}(). |
| 464 | * If there are event triggers attached to this event that requires |
| 465 | * filtering against its fields, then they wil be called as the |
| 466 | * entry already holds the field information of the current event. |
| 467 | * |
| 468 | * It also checks if the event should be discarded or not. |
| 469 | * It is to be discarded if the event is soft disabled and the |
| 470 | * event was only recorded to process triggers, or if the event |
| 471 | * filter is active and this event did not match the filters. |
| 472 | * |
| 473 | * Returns true if the event is discarded, false otherwise. |
| 474 | */ |
| 475 | static inline bool |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 476 | __event_trigger_test_discard(struct trace_event_file *file, |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 477 | struct ring_buffer *buffer, |
| 478 | struct ring_buffer_event *event, |
| 479 | void *entry, |
| 480 | enum event_trigger_type *tt) |
| 481 | { |
| 482 | unsigned long eflags = file->flags; |
| 483 | |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 484 | if (eflags & EVENT_FILE_FL_TRIGGER_COND) |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 485 | *tt = event_triggers_call(file, entry); |
| 486 | |
Steven Rostedt (Red Hat) | 5d6ad96 | 2015-05-13 15:12:33 -0400 | [diff] [blame] | 487 | if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags)) |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 488 | ring_buffer_discard_commit(buffer, event); |
| 489 | else if (!filter_check_discard(file, entry, buffer, event)) |
| 490 | return false; |
| 491 | |
| 492 | return true; |
| 493 | } |
| 494 | |
| 495 | /** |
| 496 | * event_trigger_unlock_commit - handle triggers and finish event commit |
| 497 | * @file: The file pointer assoctiated to the event |
| 498 | * @buffer: The ring buffer that the event is being written to |
| 499 | * @event: The event meta data in the ring buffer |
| 500 | * @entry: The event itself |
| 501 | * @irq_flags: The state of the interrupts at the start of the event |
| 502 | * @pc: The state of the preempt count at the start of the event. |
| 503 | * |
| 504 | * This is a helper function to handle triggers that require data |
| 505 | * from the event itself. It also tests the event against filters and |
| 506 | * if the event is soft disabled and should be discarded. |
| 507 | */ |
| 508 | static inline void |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 509 | event_trigger_unlock_commit(struct trace_event_file *file, |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 510 | struct ring_buffer *buffer, |
| 511 | struct ring_buffer_event *event, |
| 512 | void *entry, unsigned long irq_flags, int pc) |
| 513 | { |
| 514 | enum event_trigger_type tt = ETT_NONE; |
| 515 | |
| 516 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) |
Steven Rostedt (Red Hat) | b7f0c95 | 2015-09-25 17:38:44 -0400 | [diff] [blame] | 517 | trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc); |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 518 | |
| 519 | if (tt) |
| 520 | event_triggers_post_call(file, tt); |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * event_trigger_unlock_commit_regs - handle triggers and finish event commit |
| 525 | * @file: The file pointer assoctiated to the event |
| 526 | * @buffer: The ring buffer that the event is being written to |
| 527 | * @event: The event meta data in the ring buffer |
| 528 | * @entry: The event itself |
| 529 | * @irq_flags: The state of the interrupts at the start of the event |
| 530 | * @pc: The state of the preempt count at the start of the event. |
| 531 | * |
| 532 | * This is a helper function to handle triggers that require data |
| 533 | * from the event itself. It also tests the event against filters and |
| 534 | * if the event is soft disabled and should be discarded. |
| 535 | * |
| 536 | * Same as event_trigger_unlock_commit() but calls |
| 537 | * trace_buffer_unlock_commit_regs() instead of trace_buffer_unlock_commit(). |
| 538 | */ |
| 539 | static inline void |
Steven Rostedt (Red Hat) | 7f1d2f8 | 2015-05-05 10:09:53 -0400 | [diff] [blame] | 540 | event_trigger_unlock_commit_regs(struct trace_event_file *file, |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 541 | struct ring_buffer *buffer, |
| 542 | struct ring_buffer_event *event, |
| 543 | void *entry, unsigned long irq_flags, int pc, |
| 544 | struct pt_regs *regs) |
| 545 | { |
| 546 | enum event_trigger_type tt = ETT_NONE; |
| 547 | |
| 548 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) |
Steven Rostedt (Red Hat) | b7f0c95 | 2015-09-25 17:38:44 -0400 | [diff] [blame] | 549 | trace_buffer_unlock_commit_regs(file->tr, buffer, event, |
Steven Rostedt (Red Hat) | 13a1e4a | 2014-01-06 21:32:10 -0500 | [diff] [blame] | 550 | irq_flags, pc, regs); |
| 551 | |
| 552 | if (tt) |
| 553 | event_triggers_post_call(file, tt); |
| 554 | } |
| 555 | |
Wang Nan | 098d216 | 2015-07-01 02:13:49 +0000 | [diff] [blame] | 556 | #ifdef CONFIG_BPF_EVENTS |
Alexei Starovoitov | 2541517 | 2015-03-25 12:49:20 -0700 | [diff] [blame] | 557 | unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx); |
| 558 | #else |
| 559 | static inline unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx) |
| 560 | { |
| 561 | return 1; |
| 562 | } |
| 563 | #endif |
| 564 | |
Li Zefan | 43b51ea | 2009-08-07 10:33:22 +0800 | [diff] [blame] | 565 | enum { |
| 566 | FILTER_OTHER = 0, |
| 567 | FILTER_STATIC_STRING, |
| 568 | FILTER_DYN_STRING, |
Li Zefan | 87a342f | 2009-08-07 10:33:43 +0800 | [diff] [blame] | 569 | FILTER_PTR_STRING, |
Jiri Olsa | 02aa316 | 2012-02-15 15:51:53 +0100 | [diff] [blame] | 570 | FILTER_TRACE_FN, |
Li Zefan | 43b51ea | 2009-08-07 10:33:22 +0800 | [diff] [blame] | 571 | }; |
| 572 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 573 | extern int trace_event_raw_init(struct trace_event_call *call); |
| 574 | extern int trace_define_field(struct trace_event_call *call, const char *type, |
Frederic Weisbecker | aeaeae1 | 2009-08-27 05:09:51 +0200 | [diff] [blame] | 575 | const char *name, int offset, int size, |
| 576 | int is_signed, int filter_type); |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 577 | extern int trace_add_event_call(struct trace_event_call *call); |
| 578 | extern int trace_remove_event_call(struct trace_event_call *call); |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 579 | |
Steven Rostedt (Red Hat) | d2802d0 | 2013-04-19 17:10:27 -0400 | [diff] [blame] | 580 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 581 | |
Steven Rostedt | 4671c79 | 2009-05-08 16:27:41 -0400 | [diff] [blame] | 582 | int trace_set_clr_event(const char *system, const char *event, int set); |
| 583 | |
Steven Rostedt | 97f2025 | 2009-04-13 11:20:49 -0400 | [diff] [blame] | 584 | /* |
| 585 | * The double __builtin_constant_p is because gcc will give us an error |
| 586 | * if we try to allocate the static variable to fmt if it is not a |
| 587 | * constant. Even with the outer if statement optimizing out. |
| 588 | */ |
| 589 | #define event_trace_printk(ip, fmt, args...) \ |
| 590 | do { \ |
| 591 | __trace_printk_check_format(fmt, ##args); \ |
| 592 | tracing_record_cmdline(current); \ |
| 593 | if (__builtin_constant_p(fmt)) { \ |
| 594 | static const char *trace_printk_fmt \ |
| 595 | __attribute__((section("__trace_printk_fmt"))) = \ |
| 596 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
| 597 | \ |
| 598 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ |
| 599 | } else \ |
| 600 | __trace_printk(ip, fmt, ##args); \ |
| 601 | } while (0) |
| 602 | |
Li Zefan | 07b139c | 2009-12-21 14:27:35 +0800 | [diff] [blame] | 603 | #ifdef CONFIG_PERF_EVENTS |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 604 | struct perf_event; |
Frederic Weisbecker | c530665 | 2010-03-03 07:16:16 +0100 | [diff] [blame] | 605 | |
| 606 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); |
| 607 | |
Peter Zijlstra | 1c024eca | 2010-05-19 14:02:22 +0200 | [diff] [blame] | 608 | extern int perf_trace_init(struct perf_event *event); |
| 609 | extern void perf_trace_destroy(struct perf_event *event); |
Peter Zijlstra | a4eaf7f | 2010-06-16 14:37:10 +0200 | [diff] [blame] | 610 | extern int perf_trace_add(struct perf_event *event, int flags); |
| 611 | extern void perf_trace_del(struct perf_event *event, int flags); |
Peter Zijlstra | 1c024eca | 2010-05-19 14:02:22 +0200 | [diff] [blame] | 612 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 613 | char *filter_str); |
| 614 | extern void ftrace_profile_free_filter(struct perf_event *event); |
Peter Zijlstra | b7e2ece | 2010-05-19 10:52:27 +0200 | [diff] [blame] | 615 | extern void *perf_trace_buf_prepare(int size, unsigned short type, |
Peter Zijlstra (Intel) | 86038c5 | 2014-12-16 12:47:34 +0100 | [diff] [blame] | 616 | struct pt_regs **regs, int *rctxp); |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 617 | |
| 618 | static inline void |
Frederic Weisbecker | 97d5a22 | 2010-03-05 05:35:37 +0100 | [diff] [blame] | 619 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr, |
Andrew Vagin | e6dab5f | 2012-07-11 18:14:58 +0400 | [diff] [blame] | 620 | u64 count, struct pt_regs *regs, void *head, |
| 621 | struct task_struct *task) |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 622 | { |
Andrew Vagin | e6dab5f | 2012-07-11 18:14:58 +0400 | [diff] [blame] | 623 | perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task); |
Xiao Guangrong | 430ad5a | 2010-01-28 09:32:29 +0800 | [diff] [blame] | 624 | } |
Li Zefan | 6fb2915 | 2009-10-15 11:21:42 +0800 | [diff] [blame] | 625 | #endif |
| 626 | |
Steven Rostedt (Red Hat) | 2425bcb | 2015-05-05 11:45:27 -0400 | [diff] [blame] | 627 | #endif /* _LINUX_TRACE_EVENT_H */ |