consumerd: pass channel instance to stream creation function
[lttng-tools.git] / src / common / lttng-kernel.h
1 /*
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>
5 *
6 * SPDX-License-Identifier: GPL-2.0-only
7 *
8 */
9
10 #ifndef _LTTNG_KERNEL_H
11 #define _LTTNG_KERNEL_H
12
13 #include <stdint.h>
14 #include <common/macros.h>
15 #include <lttng/constant.h>
16 #include <lttng/event.h>
17
18 #define LTTNG_KERNEL_SYM_NAME_LEN 256
19 #define LTTNG_KERNEL_MAX_UPROBE_NUM 32
20 #define LTTNG_KERNEL_SESSION_NAME_LEN 256
21 #define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
22
23 /*
24 * LTTng DebugFS ABI structures.
25 *
26 * This is the kernel ABI copied from lttng-modules tree.
27 */
28
29 enum lttng_kernel_instrumentation {
30 LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
31 LTTNG_KERNEL_TRACEPOINT = 0,
32 LTTNG_KERNEL_KPROBE = 1,
33 LTTNG_KERNEL_FUNCTION = 2,
34 LTTNG_KERNEL_KRETPROBE = 3,
35 LTTNG_KERNEL_NOOP = 4, /* not hooked */
36 LTTNG_KERNEL_SYSCALL = 5,
37 LTTNG_KERNEL_UPROBE = 6,
38 };
39
40 enum lttng_kernel_context_type {
41 LTTNG_KERNEL_CONTEXT_PID = 0,
42 LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
43 LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
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,
51 LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
52 LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
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,
57 LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
58 LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
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,
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,
78 };
79
80 /* Perf counter attributes */
81 struct lttng_kernel_perf_counter_ctx {
82 uint32_t type;
83 uint64_t config;
84 char name[LTTNG_KERNEL_SYM_NAME_LEN];
85 } LTTNG_PACKED;
86
87 /* Event/Channel context */
88 #define LTTNG_KERNEL_CONTEXT_PADDING1 16
89 #define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
90 struct lttng_kernel_context {
91 enum lttng_kernel_context_type ctx;
92 char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
93
94 union {
95 struct lttng_kernel_perf_counter_ctx perf_counter;
96 char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
97 } u;
98 } LTTNG_PACKED;
99
100 struct lttng_kernel_kretprobe {
101 uint64_t addr;
102
103 uint64_t offset;
104 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
105 } LTTNG_PACKED;
106
107 /*
108 * Either addr is used, or symbol_name and offset.
109 */
110 struct lttng_kernel_kprobe {
111 uint64_t addr;
112
113 uint64_t offset;
114 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
115 } LTTNG_PACKED;
116
117 struct lttng_kernel_uprobe {
118 int fd;
119 } LTTNG_PACKED;
120
121 struct lttng_kernel_event_callsite_uprobe {
122 uint64_t offset;
123 } LTTNG_PACKED;
124
125 struct lttng_kernel_event_callsite {
126 union {
127 struct lttng_kernel_event_callsite_uprobe uprobe;
128 } u;
129 } LTTNG_PACKED;
130
131 /* Function tracer */
132 struct lttng_kernel_function {
133 char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
134 } LTTNG_PACKED;
135
136 #define LTTNG_KERNEL_EVENT_PADDING1 16
137 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
138 struct lttng_kernel_event {
139 char name[LTTNG_KERNEL_SYM_NAME_LEN];
140 enum lttng_kernel_instrumentation instrumentation;
141 char padding[LTTNG_KERNEL_EVENT_PADDING1];
142
143 /* Per instrumentation type configuration */
144 union {
145 struct lttng_kernel_kretprobe kretprobe;
146 struct lttng_kernel_kprobe kprobe;
147 struct lttng_kernel_uprobe uprobe;
148 struct lttng_kernel_function ftrace;
149 char padding[LTTNG_KERNEL_EVENT_PADDING2];
150 } u;
151 } LTTNG_PACKED;
152
153 struct lttng_kernel_tracer_version {
154 uint32_t major;
155 uint32_t minor;
156 uint32_t patchlevel;
157 } LTTNG_PACKED;
158
159 struct lttng_kernel_tracer_abi_version {
160 uint32_t major;
161 uint32_t minor;
162 } LTTNG_PACKED;
163
164 struct lttng_kernel_syscall_mask {
165 uint32_t len; /* in bits */
166 char mask[];
167 } LTTNG_PACKED;
168
169 /*
170 * kernel channel
171 */
172 #define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
173 struct lttng_kernel_channel {
174 uint64_t subbuf_size; /* bytes */
175 uint64_t num_subbuf; /* power of 2 */
176 unsigned int switch_timer_interval; /* usec */
177 unsigned int read_timer_interval; /* usec */
178 enum lttng_event_output output; /* splice, mmap */
179
180 int overwrite; /* 1: overwrite, 0: discard */
181 char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
182 } LTTNG_PACKED;
183
184 #define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
185 struct lttng_kernel_filter_bytecode {
186 uint32_t len;
187 uint32_t reloc_offset;
188 uint64_t seqnum;
189 char data[0];
190 } LTTNG_PACKED;
191
192 /*
193 * kernel session name
194 */
195 struct lttng_kernel_session_name {
196 char name[LTTNG_KERNEL_SESSION_NAME_LEN];
197 } LTTNG_PACKED;
198
199 /*
200 * kernel session creation datetime
201 */
202 struct lttng_kernel_session_creation_time {
203 char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
204 } LTTNG_PACKED;
205
206 enum lttng_kernel_tracker_type {
207 LTTNG_KERNEL_TRACKER_UNKNOWN = -1,
208
209 LTTNG_KERNEL_TRACKER_PID = 0,
210 LTTNG_KERNEL_TRACKER_VPID = 1,
211 LTTNG_KERNEL_TRACKER_UID = 2,
212 LTTNG_KERNEL_TRACKER_VUID = 3,
213 LTTNG_KERNEL_TRACKER_GID = 4,
214 LTTNG_KERNEL_TRACKER_VGID = 5,
215 };
216
217 struct lttng_kernel_tracker_args {
218 enum lttng_kernel_tracker_type type;
219 int32_t id;
220 };
221
222 #endif /* _LTTNG_KERNEL_H */
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