SoW-2020-0002: Trace Hit Counters: trigger error reporting integration
[lttng-tools.git] / src / common / lttng-kernel.h
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93128a92 1/*
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2 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
93128a92 5 *
ab5be9fa 6 * SPDX-License-Identifier: GPL-2.0-only
93128a92 7 *
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8 */
9
10#ifndef _LTTNG_KERNEL_H
11#define _LTTNG_KERNEL_H
12
e848fc76 13#include <stdint.h>
113373e4 14#include <common/macros.h>
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15#include <lttng/constant.h>
16#include <lttng/event.h>
e848fc76 17
dbbb3ec5 18#define LTTNG_KERNEL_SYM_NAME_LEN 256
0ef03255 19#define LTTNG_KERNEL_MAX_UPROBE_NUM 32
8ff4109e 20#define LTTNG_KERNEL_SESSION_NAME_LEN 256
e04b2181 21#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
9cb98350 22
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23/*
24 * LTTng DebugFS ABI structures.
25 *
26 * This is the kernel ABI copied from lttng-modules tree.
27 */
28
9cb98350 29enum lttng_kernel_instrumentation {
5f822d0a 30 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
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31 LTTNG_KERNEL_TRACEPOINT = 0,
32 LTTNG_KERNEL_KPROBE = 1,
33 LTTNG_KERNEL_FUNCTION = 2,
8f0d098b 34 LTTNG_KERNEL_KRETPROBE = 3,
0133c199 35 LTTNG_KERNEL_NOOP = 4, /* not hooked */
a54bd42d 36 LTTNG_KERNEL_SYSCALL = 5,
1ab8c2ad 37 LTTNG_KERNEL_UPROBE = 6,
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38};
39
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40enum lttng_kernel_context_type {
41 LTTNG_KERNEL_CONTEXT_PID = 0,
aa3514e9 42 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
9197c5c4 43 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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44 LTTNG_KERNEL_CONTEXT_PRIO = 3,
45 LTTNG_KERNEL_CONTEXT_NICE = 4,
46 LTTNG_KERNEL_CONTEXT_VPID = 5,
47 LTTNG_KERNEL_CONTEXT_TID = 6,
48 LTTNG_KERNEL_CONTEXT_VTID = 7,
49 LTTNG_KERNEL_CONTEXT_PPID = 8,
50 LTTNG_KERNEL_CONTEXT_VPPID = 9,
54773d68 51 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
33e801a9 52 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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53 LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
54 LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
55 LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
56 LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
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57 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
58 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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59 LTTNG_KERNEL_CONTEXT_CGROUP_NS = 18,
60 LTTNG_KERNEL_CONTEXT_IPC_NS = 19,
61 LTTNG_KERNEL_CONTEXT_MNT_NS = 20,
62 LTTNG_KERNEL_CONTEXT_NET_NS = 21,
63 LTTNG_KERNEL_CONTEXT_PID_NS = 22,
64 LTTNG_KERNEL_CONTEXT_USER_NS = 23,
65 LTTNG_KERNEL_CONTEXT_UTS_NS = 24,
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66 LTTNG_KERNEL_CONTEXT_UID = 25,
67 LTTNG_KERNEL_CONTEXT_EUID = 26,
68 LTTNG_KERNEL_CONTEXT_SUID = 27,
69 LTTNG_KERNEL_CONTEXT_GID = 28,
70 LTTNG_KERNEL_CONTEXT_EGID = 29,
71 LTTNG_KERNEL_CONTEXT_SGID = 30,
72 LTTNG_KERNEL_CONTEXT_VUID = 31,
73 LTTNG_KERNEL_CONTEXT_VEUID = 32,
74 LTTNG_KERNEL_CONTEXT_VSUID = 33,
75 LTTNG_KERNEL_CONTEXT_VGID = 34,
76 LTTNG_KERNEL_CONTEXT_VEGID = 35,
77 LTTNG_KERNEL_CONTEXT_VSGID = 36,
d37ac3cd 78 LTTNG_KERNEL_CONTEXT_TIME_NS = 37,
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79};
80
81/* Perf counter attributes */
82struct lttng_kernel_perf_counter_ctx {
83 uint32_t type;
84 uint64_t config;
dbbb3ec5 85 char name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 86} LTTNG_PACKED;
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87
88/* Event/Channel context */
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89#define LTTNG_KERNEL_CONTEXT_PADDING1 16
90#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
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91struct lttng_kernel_context {
92 enum lttng_kernel_context_type ctx;
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93 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
94
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95 union {
96 struct lttng_kernel_perf_counter_ctx perf_counter;
dbbb3ec5 97 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
7d29a247 98 } u;
113373e4 99} LTTNG_PACKED;
9cb98350 100
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101struct lttng_kernel_kretprobe {
102 uint64_t addr;
103
104 uint64_t offset;
dbbb3ec5 105 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 106} LTTNG_PACKED;
8f0d098b 107
93128a92 108/*
7d29a247 109 * Either addr is used, or symbol_name and offset.
93128a92 110 */
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111struct lttng_kernel_kprobe {
112 uint64_t addr;
113
114 uint64_t offset;
dbbb3ec5 115 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 116} LTTNG_PACKED;
9cb98350 117
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118struct lttng_kernel_uprobe {
119 int fd;
120} LTTNG_PACKED;
121
122struct lttng_kernel_event_callsite_uprobe {
123 uint64_t offset;
124} LTTNG_PACKED;
125
126struct lttng_kernel_event_callsite {
127 union {
128 struct lttng_kernel_event_callsite_uprobe uprobe;
129 } u;
130} LTTNG_PACKED;
131
f05b5f07 132/* Function tracer */
7d29a247 133struct lttng_kernel_function {
dbbb3ec5 134 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
113373e4 135} LTTNG_PACKED;
93128a92 136
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137#define LTTNG_KERNEL_EVENT_PADDING1 16
138#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
9cb98350 139struct lttng_kernel_event {
dbbb3ec5 140 char name[LTTNG_KERNEL_SYM_NAME_LEN];
9cb98350 141 enum lttng_kernel_instrumentation instrumentation;
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142 char padding[LTTNG_KERNEL_EVENT_PADDING1];
143
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144 /* Per instrumentation type configuration */
145 union {
8f0d098b 146 struct lttng_kernel_kretprobe kretprobe;
7d29a247 147 struct lttng_kernel_kprobe kprobe;
1ab8c2ad 148 struct lttng_kernel_uprobe uprobe;
7d29a247 149 struct lttng_kernel_function ftrace;
dbbb3ec5 150 char padding[LTTNG_KERNEL_EVENT_PADDING2];
9cb98350 151 } u;
113373e4 152} LTTNG_PACKED;
93128a92 153
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154#define LTTNG_KERNEL_TRIGGER_PADDING1 16
155#define LTTNG_KERNEL_TRIGGER_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
156struct lttng_kernel_trigger {
157 uint64_t id;
158 uint64_t error_counter_idx;
159 char name[LTTNG_KERNEL_SYM_NAME_LEN]; /* event name */
160 enum lttng_kernel_instrumentation instrumentation;
161 char padding[LTTNG_KERNEL_TRIGGER_PADDING1];
162
163 /* Per instrumentation type configuration */
164 union {
165 struct lttng_kernel_kretprobe kretprobe;
166 struct lttng_kernel_kprobe kprobe;
167 struct lttng_kernel_uprobe uprobe;
168 struct lttng_kernel_function ftrace;
169 char padding[LTTNG_KERNEL_TRIGGER_PADDING2];
170 } u;
171} LTTNG_PACKED;
172
173enum lttng_kernel_counter_arithmetic {
174 LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR = 1,
175};
176
177enum lttng_kernel_counter_bitness {
178 LTTNG_KERNEL_COUNTER_BITNESS_32BITS = 1,
179 LTTNG_KERNEL_COUNTER_BITNESS_64BITS = 2,
180};
181
182struct lttng_kernel_counter_dimension {
183 uint64_t size;
184 uint64_t underflow_index;
185 uint64_t overflow_index;
186 uint8_t has_underflow;
187 uint8_t has_overflow;
188} LTTNG_PACKED;
189
190#define LTTNG_KERNEL_COUNTER_DIMENSION_MAX 8
191struct lttng_kernel_counter_conf {
192 uint32_t arithmetic; /* enum lttng_kernel_counter_arithmetic */
193 uint32_t bitness; /* enum lttng_kernel_counter_bitness */
194 uint32_t number_dimensions;
195 int64_t global_sum_step;
196 struct lttng_kernel_counter_dimension dimensions[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
197} LTTNG_PACKED;
198
199struct lttng_kernel_counter_value {
200 uint32_t number_dimensions;
201 uint64_t dimension_indexes[LTTNG_KERNEL_COUNTER_DIMENSION_MAX];
202 int64_t value;
203} LTTNG_PACKED;
204
205#define LTTNG_KERNEL_TRIGGER_NOTIFICATION_PADDING 32
206struct lttng_kernel_trigger_notification {
207 uint64_t id;
208 uint16_t capture_buf_size;
209 char padding[LTTNG_KERNEL_TRIGGER_NOTIFICATION_PADDING];
210} LTTNG_PACKED;
211
212#define LTTNG_KERNEL_CAPTURE_BYTECODE_MAX_LEN 65536
213struct lttng_kernel_capture_bytecode {
214 uint32_t len;
215 uint32_t reloc_offset;
216 uint64_t seqnum;
217 char data[0];
218} LTTNG_PACKED;
219
9cb98350 220struct lttng_kernel_tracer_version {
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221 uint32_t major;
222 uint32_t minor;
9cb98350 223 uint32_t patchlevel;
113373e4 224} LTTNG_PACKED;
93128a92 225
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226struct lttng_kernel_tracer_abi_version {
227 uint32_t major;
228 uint32_t minor;
229} LTTNG_PACKED;
230
e80c3634 231struct lttng_kernel_syscall_mask {
46820c8b 232 uint32_t len; /* in bits */
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233 char mask[];
234} LTTNG_PACKED;
235
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236/*
237 * kernel channel
238 */
239#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
240struct lttng_kernel_channel {
241 uint64_t subbuf_size; /* bytes */
242 uint64_t num_subbuf; /* power of 2 */
243 unsigned int switch_timer_interval; /* usec */
244 unsigned int read_timer_interval; /* usec */
245 enum lttng_event_output output; /* splice, mmap */
246
247 int overwrite; /* 1: overwrite, 0: discard */
248 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
113373e4 249} LTTNG_PACKED;
d0254c7c 250
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251#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
252struct lttng_kernel_filter_bytecode {
253 uint32_t len;
254 uint32_t reloc_offset;
255 uint64_t seqnum;
256 char data[0];
257} LTTNG_PACKED;
258
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259/*
260 * kernel session name
261 */
262struct lttng_kernel_session_name {
263 char name[LTTNG_KERNEL_SESSION_NAME_LEN];
264} LTTNG_PACKED;
265
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266/*
267 * kernel session creation datetime
268 */
269struct lttng_kernel_session_creation_time {
270 char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
271} LTTNG_PACKED;
272
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273enum lttng_kernel_tracker_type {
274 LTTNG_KERNEL_TRACKER_UNKNOWN = -1,
275
276 LTTNG_KERNEL_TRACKER_PID = 0,
277 LTTNG_KERNEL_TRACKER_VPID = 1,
278 LTTNG_KERNEL_TRACKER_UID = 2,
279 LTTNG_KERNEL_TRACKER_VUID = 3,
280 LTTNG_KERNEL_TRACKER_GID = 4,
281 LTTNG_KERNEL_TRACKER_VGID = 5,
282};
283
284struct lttng_kernel_tracker_args {
285 enum lttng_kernel_tracker_type type;
286 int32_t id;
287};
288
93128a92 289#endif /* _LTTNG_KERNEL_H */
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