Commit | Line | Data |
---|---|---|
ee0326c0 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca> |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
ee0326c0 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
ee0326c0 | 7 | * |
ee0326c0 | 8 | */ |
16421f6e | 9 | |
159b042f | 10 | #include "lttng/tracker.h" |
6c1c0768 | 11 | #define _LGPL_SOURCE |
95ba0f2f | 12 | #define __USE_LINUX_IOCTL_DEFS |
16421f6e | 13 | #include <sys/ioctl.h> |
4dbc372b | 14 | #include <string.h> |
46820c8b | 15 | #include <common/align.h> |
8ff4109e | 16 | #include <common/macros.h> |
edf4b93e | 17 | #include <common/compat/errno.h> |
a6bd6d9b JG |
18 | #include <stdarg.h> |
19 | #include <assert.h> | |
e04b2181 | 20 | #include <common/time.h> |
16421f6e | 21 | |
10a8a223 | 22 | #include "kernel-ctl.h" |
16421f6e | 23 | #include "kernel-ioctl.h" |
16421f6e | 24 | |
9074be22 SM |
25 | #define LTTNG_IOCTL_CHECK(fildes, request, ...) \ |
26 | ({ \ | |
27 | int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ | |
28 | assert(_ioctl_ret <= 0); \ | |
29 | !_ioctl_ret ? 0 : -errno; \ | |
30 | }) | |
5226f1bc | 31 | |
9074be22 SM |
32 | #define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) \ |
33 | ({ \ | |
34 | int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ | |
35 | _ioctl_ret >= 0 ? _ioctl_ret : -errno; \ | |
36 | }) | |
a6bd6d9b | 37 | |
4dbc372b JD |
38 | /* |
39 | * This flag indicates which version of the kernel ABI to use. The old | |
40 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
41 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
42 | * deprecated and will be removed eventually. | |
43 | */ | |
44 | static int lttng_kernel_use_old_abi = -1; | |
45 | ||
46 | /* | |
47 | * Execute the new or old ioctl depending on the ABI version. | |
48 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
49 | * this function tests if the new ABI is available and otherwise fallbacks | |
50 | * on the old one. | |
51 | * This function takes the fd on which the ioctl must be executed and the old | |
52 | * and new request codes. | |
53 | * It returns the return value of the ioctl executed. | |
54 | */ | |
55 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
56 | unsigned long newname) | |
57 | { | |
58 | int ret; | |
59 | ||
60 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 61 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
62 | if (!ret) { |
63 | lttng_kernel_use_old_abi = 0; | |
64 | goto end; | |
65 | } | |
66 | lttng_kernel_use_old_abi = 1; | |
67 | } | |
68 | if (lttng_kernel_use_old_abi) { | |
5226f1bc | 69 | ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); |
4dbc372b | 70 | } else { |
5226f1bc | 71 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
72 | } |
73 | ||
74 | end: | |
75 | return ret; | |
76 | } | |
77 | ||
964ccb60 | 78 | int kernctl_create_session(int fd) |
d65106b1 | 79 | { |
4dbc372b JD |
80 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
81 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
82 | } |
83 | ||
964ccb60 MD |
84 | /* open the metadata global channel */ |
85 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 86 | { |
4dbc372b JD |
87 | struct lttng_kernel_channel channel; |
88 | ||
89 | if (lttng_kernel_use_old_abi) { | |
10600be0 MD |
90 | struct lttng_kernel_old_channel old_channel; |
91 | ||
92 | memset(&old_channel, 0, sizeof(old_channel)); | |
4dbc372b JD |
93 | old_channel.overwrite = chops->overwrite; |
94 | old_channel.subbuf_size = chops->subbuf_size; | |
95 | old_channel.num_subbuf = chops->num_subbuf; | |
96 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
97 | old_channel.read_timer_interval = chops->read_timer_interval; | |
98 | old_channel.output = chops->output; | |
f853c53a DG |
99 | |
100 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
101 | /* | |
102 | * The new channel padding is smaller than the old ABI so we use the | |
103 | * new ABI padding size for the memcpy. | |
104 | */ | |
105 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 106 | |
5226f1bc JG |
107 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA, |
108 | &old_channel); | |
4dbc372b JD |
109 | } |
110 | ||
10600be0 | 111 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
112 | channel.overwrite = chops->overwrite; |
113 | channel.subbuf_size = chops->subbuf_size; | |
114 | channel.num_subbuf = chops->num_subbuf; | |
115 | channel.switch_timer_interval = chops->switch_timer_interval; | |
116 | channel.read_timer_interval = chops->read_timer_interval; | |
117 | channel.output = chops->output; | |
ea207e3b | 118 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 119 | |
5226f1bc | 120 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel); |
f3ed775e DG |
121 | } |
122 | ||
123 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 124 | { |
4dbc372b JD |
125 | struct lttng_kernel_channel channel; |
126 | ||
c74101ef | 127 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
128 | if (lttng_kernel_use_old_abi) { |
129 | struct lttng_kernel_old_channel old_channel; | |
130 | ||
131 | old_channel.overwrite = chops->overwrite; | |
132 | old_channel.subbuf_size = chops->subbuf_size; | |
133 | old_channel.num_subbuf = chops->num_subbuf; | |
134 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
135 | old_channel.read_timer_interval = chops->read_timer_interval; | |
136 | old_channel.output = chops->output; | |
f853c53a DG |
137 | |
138 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
139 | /* | |
140 | * The new channel padding is smaller than the old ABI so we use the | |
141 | * new ABI padding size for the memcpy. | |
142 | */ | |
143 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 144 | |
5226f1bc JG |
145 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL, |
146 | &old_channel); | |
4dbc372b JD |
147 | } |
148 | ||
149 | channel.overwrite = chops->overwrite; | |
150 | channel.subbuf_size = chops->subbuf_size; | |
151 | channel.num_subbuf = chops->num_subbuf; | |
152 | channel.switch_timer_interval = chops->switch_timer_interval; | |
153 | channel.read_timer_interval = chops->read_timer_interval; | |
154 | channel.output = chops->output; | |
ea207e3b | 155 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 156 | |
5226f1bc | 157 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel); |
16421f6e DG |
158 | } |
159 | ||
46820c8b MD |
160 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
161 | { | |
162 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
163 | size_t array_alloc_len; | |
164 | char *new_mask; | |
165 | int ret = 0; | |
166 | ||
167 | if (!syscall_mask) { | |
168 | ret = -1; | |
169 | goto end; | |
170 | } | |
171 | ||
172 | if (!nr_bits) { | |
173 | ret = -1; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | kmask_len.len = 0; | |
5226f1bc | 178 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
179 | if (ret) { |
180 | goto end; | |
181 | } | |
182 | ||
183 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 184 | |
46820c8b MD |
185 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
186 | if (!kmask) { | |
187 | ret = -1; | |
188 | goto end; | |
189 | } | |
190 | ||
191 | kmask->len = kmask_len.len; | |
5226f1bc | 192 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
193 | if (ret) { |
194 | goto end; | |
195 | } | |
196 | ||
834978fd | 197 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
198 | if (!new_mask) { |
199 | ret = -1; | |
200 | goto end; | |
201 | } | |
202 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
203 | *syscall_mask = new_mask; | |
204 | *nr_bits = kmask->len; | |
205 | ||
206 | end: | |
207 | free(kmask); | |
208 | return ret; | |
209 | } | |
210 | ||
ccf10263 MD |
211 | int kernctl_track_pid(int fd, int pid) |
212 | { | |
5226f1bc | 213 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
214 | } |
215 | ||
216 | int kernctl_untrack_pid(int fd, int pid) | |
217 | { | |
5226f1bc | 218 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
219 | } |
220 | ||
a5dfbb9d MD |
221 | int kernctl_list_tracker_pids(int fd) |
222 | { | |
5226f1bc | 223 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); |
a5dfbb9d MD |
224 | } |
225 | ||
d01c0e56 | 226 | static enum lttng_kernel_tracker_type get_kernel_tracker_type( |
159b042f | 227 | enum lttng_process_attr process_attr) |
d01c0e56 | 228 | { |
159b042f JG |
229 | switch (process_attr) { |
230 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
d01c0e56 | 231 | return LTTNG_KERNEL_TRACKER_PID; |
159b042f | 232 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: |
d01c0e56 | 233 | return LTTNG_KERNEL_TRACKER_VPID; |
159b042f | 234 | case LTTNG_PROCESS_ATTR_USER_ID: |
d01c0e56 | 235 | return LTTNG_KERNEL_TRACKER_UID; |
159b042f | 236 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: |
d01c0e56 | 237 | return LTTNG_KERNEL_TRACKER_VUID; |
159b042f | 238 | case LTTNG_PROCESS_ATTR_GROUP_ID: |
d01c0e56 | 239 | return LTTNG_KERNEL_TRACKER_GID; |
159b042f | 240 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: |
d01c0e56 MD |
241 | return LTTNG_KERNEL_TRACKER_VGID; |
242 | default: | |
243 | return LTTNG_KERNEL_TRACKER_UNKNOWN; | |
244 | } | |
245 | } | |
246 | ||
159b042f | 247 | int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id) |
d01c0e56 MD |
248 | { |
249 | struct lttng_kernel_tracker_args args; | |
250 | ||
251 | args.id = id; | |
159b042f | 252 | args.type = get_kernel_tracker_type(process_attr); |
d01c0e56 MD |
253 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { |
254 | errno = EINVAL; | |
255 | return -1; | |
256 | } | |
257 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_ID, &args); | |
258 | } | |
259 | ||
159b042f | 260 | int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id) |
d01c0e56 MD |
261 | { |
262 | struct lttng_kernel_tracker_args args; | |
263 | ||
264 | args.id = id; | |
159b042f | 265 | args.type = get_kernel_tracker_type(process_attr); |
d01c0e56 MD |
266 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { |
267 | errno = EINVAL; | |
268 | return -1; | |
269 | } | |
270 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args); | |
271 | } | |
272 | ||
159b042f | 273 | int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr) |
d01c0e56 MD |
274 | { |
275 | struct lttng_kernel_tracker_args args; | |
276 | ||
277 | args.id = -1; | |
159b042f | 278 | args.type = get_kernel_tracker_type(process_attr); |
d01c0e56 MD |
279 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { |
280 | errno = EINVAL; | |
281 | return -1; | |
282 | } | |
283 | return LTTNG_IOCTL_NO_CHECK( | |
284 | fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS, &args); | |
285 | } | |
286 | ||
eded6438 | 287 | int kernctl_session_regenerate_metadata(int fd) |
93ec662e | 288 | { |
5226f1bc | 289 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
290 | } |
291 | ||
c2561365 JD |
292 | int kernctl_session_regenerate_statedump(int fd) |
293 | { | |
294 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); | |
295 | } | |
296 | ||
8ff4109e JR |
297 | int kernctl_session_set_name(int fd, const char *name) |
298 | { | |
299 | int ret; | |
300 | struct lttng_kernel_session_name session_name; | |
301 | ||
302 | ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); | |
303 | if (ret) { | |
304 | goto end; | |
305 | } | |
306 | ||
307 | ret = LTTNG_IOCTL_CHECK( | |
308 | fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name); | |
309 | end: | |
310 | return ret; | |
311 | } | |
312 | ||
e04b2181 JR |
313 | int kernctl_session_set_creation_time(int fd, time_t time) |
314 | { | |
315 | int ret; | |
316 | struct lttng_kernel_session_creation_time creation_time; | |
317 | ||
318 | ret = time_to_iso8601_str(time, creation_time.iso8601, | |
319 | sizeof(creation_time.iso8601)); | |
320 | if (ret) { | |
321 | goto end; | |
322 | } | |
323 | ||
324 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_SET_CREATION_TIME, | |
325 | &creation_time); | |
326 | end: | |
327 | return ret; | |
328 | } | |
329 | ||
964ccb60 | 330 | int kernctl_create_stream(int fd) |
16421f6e | 331 | { |
4dbc372b JD |
332 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
333 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
334 | } |
335 | ||
964ccb60 | 336 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 337 | { |
4dbc372b JD |
338 | if (lttng_kernel_use_old_abi) { |
339 | struct lttng_kernel_old_event old_event; | |
340 | ||
10600be0 | 341 | memset(&old_event, 0, sizeof(old_event)); |
4dbc372b JD |
342 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); |
343 | old_event.instrumentation = ev->instrumentation; | |
344 | switch (ev->instrumentation) { | |
345 | case LTTNG_KERNEL_KPROBE: | |
346 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
347 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
348 | memcpy(old_event.u.kprobe.symbol_name, | |
349 | ev->u.kprobe.symbol_name, | |
350 | sizeof(old_event.u.kprobe.symbol_name)); | |
351 | break; | |
352 | case LTTNG_KERNEL_KRETPROBE: | |
353 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
354 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
355 | memcpy(old_event.u.kretprobe.symbol_name, | |
356 | ev->u.kretprobe.symbol_name, | |
357 | sizeof(old_event.u.kretprobe.symbol_name)); | |
358 | break; | |
359 | case LTTNG_KERNEL_FUNCTION: | |
360 | memcpy(old_event.u.ftrace.symbol_name, | |
361 | ev->u.ftrace.symbol_name, | |
362 | sizeof(old_event.u.ftrace.symbol_name)); | |
363 | break; | |
364 | default: | |
365 | break; | |
366 | } | |
367 | ||
5226f1bc JG |
368 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT, |
369 | &old_event); | |
4dbc372b | 370 | } |
5226f1bc | 371 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
372 | } |
373 | ||
964ccb60 | 374 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 375 | { |
4dbc372b JD |
376 | if (lttng_kernel_use_old_abi) { |
377 | struct lttng_kernel_old_context old_ctx; | |
378 | ||
10600be0 | 379 | memset(&old_ctx, 0, sizeof(old_ctx)); |
4dbc372b JD |
380 | old_ctx.ctx = ctx->ctx; |
381 | /* only type that uses the union */ | |
aa3514e9 | 382 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
383 | old_ctx.u.perf_counter.type = |
384 | ctx->u.perf_counter.type; | |
385 | old_ctx.u.perf_counter.config = | |
386 | ctx->u.perf_counter.config; | |
387 | memcpy(old_ctx.u.perf_counter.name, | |
388 | ctx->u.perf_counter.name, | |
389 | sizeof(old_ctx.u.perf_counter.name)); | |
390 | } | |
5226f1bc | 391 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 392 | } |
5226f1bc | 393 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
394 | } |
395 | ||
964ccb60 | 396 | |
5226f1bc | 397 | /* Enable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
398 | int kernctl_enable(int fd) |
399 | { | |
4dbc372b JD |
400 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
401 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
402 | } |
403 | ||
5226f1bc | 404 | /* Disable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
405 | int kernctl_disable(int fd) |
406 | { | |
4dbc372b JD |
407 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
408 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
409 | } |
410 | ||
964ccb60 | 411 | int kernctl_start_session(int fd) |
16421f6e | 412 | { |
4dbc372b JD |
413 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
414 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
415 | } |
416 | ||
417 | int kernctl_stop_session(int fd) | |
418 | { | |
4dbc372b JD |
419 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
420 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
421 | } |
422 | ||
cfb1c9bc JR |
423 | int kernctl_create_event_notifier_group(int fd) |
424 | { | |
425 | return LTTNG_IOCTL_NO_CHECK(fd, | |
426 | LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_CREATE); | |
427 | } | |
428 | ||
429 | int kernctl_create_event_notifier_group_notification_fd(int group_fd) | |
430 | { | |
431 | return LTTNG_IOCTL_NO_CHECK(group_fd, | |
432 | LTTNG_KERNEL_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD); | |
433 | } | |
434 | ||
90aa04a1 FD |
435 | int kernctl_create_event_notifier_group_error_counter(int group_fd, |
436 | const struct lttng_kernel_counter_conf *error_counter_conf) | |
437 | { | |
438 | return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_COUNTER, | |
439 | error_counter_conf); | |
440 | } | |
441 | ||
442 | int kernctl_counter_get_aggregate_value(int counter_fd, | |
443 | struct lttng_kernel_counter_aggregate *value) | |
444 | { | |
445 | return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_COUNTER_AGGREGATE, | |
446 | value); | |
447 | } | |
448 | ||
449 | int kernctl_counter_clear(int counter_fd, | |
450 | struct lttng_kernel_counter_clear *clear) | |
451 | { | |
452 | return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_COUNTER_CLEAR, | |
453 | clear); | |
454 | } | |
455 | ||
cfb1c9bc JR |
456 | int kernctl_create_event_notifier(int group_fd, |
457 | const struct lttng_kernel_event_notifier *event_notifier) | |
458 | { | |
459 | return LTTNG_IOCTL_NO_CHECK(group_fd, | |
460 | LTTNG_KERNEL_EVENT_NOTIFIER_CREATE, event_notifier); | |
461 | } | |
462 | ||
bbd6675c JR |
463 | int kernctl_capture(int fd, const struct lttng_bytecode *capture) |
464 | { | |
465 | int ret; | |
466 | struct lttng_kernel_capture_bytecode *kb; | |
467 | ||
468 | /* Translate bytecode to kernel bytecode. */ | |
469 | kb = zmalloc(sizeof(*kb) + capture->len); | |
470 | if (!kb) { | |
471 | ret = -ENOMEM; | |
472 | goto end; | |
473 | } | |
474 | ||
475 | kb->len = capture->len; | |
476 | kb->reloc_offset = capture->reloc_table_offset; | |
477 | kb->seqnum = capture->seqnum; | |
478 | memcpy(kb->data, capture->data, capture->len); | |
479 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CAPTURE, kb); | |
480 | free(kb); | |
481 | end: | |
482 | return ret; | |
483 | } | |
484 | ||
2b00d462 | 485 | int kernctl_filter(int fd, const struct lttng_bytecode *filter) |
00a62084 MD |
486 | { |
487 | struct lttng_kernel_filter_bytecode *kb; | |
488 | uint32_t len; | |
489 | int ret; | |
490 | ||
491 | /* Translate bytecode to kernel bytecode */ | |
492 | kb = zmalloc(sizeof(*kb) + filter->len); | |
493 | if (!kb) | |
494 | return -ENOMEM; | |
495 | kb->len = len = filter->len; | |
496 | kb->reloc_offset = filter->reloc_table_offset; | |
497 | kb->seqnum = filter->seqnum; | |
498 | memcpy(kb->data, filter->data, len); | |
5226f1bc | 499 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
500 | free(kb); |
501 | return ret; | |
502 | } | |
503 | ||
1ab8c2ad FD |
504 | int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite) |
505 | { | |
506 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite); | |
507 | } | |
508 | ||
964ccb60 MD |
509 | int kernctl_tracepoint_list(int fd) |
510 | { | |
4dbc372b JD |
511 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
512 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
513 | } |
514 | ||
d02666a9 MD |
515 | int kernctl_syscall_list(int fd) |
516 | { | |
5226f1bc | 517 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST); |
d02666a9 MD |
518 | } |
519 | ||
964ccb60 MD |
520 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
521 | { | |
4dbc372b JD |
522 | int ret; |
523 | ||
524 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 525 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
526 | if (!ret) { |
527 | lttng_kernel_use_old_abi = 0; | |
528 | goto end; | |
529 | } | |
530 | lttng_kernel_use_old_abi = 1; | |
531 | } | |
532 | if (lttng_kernel_use_old_abi) { | |
533 | struct lttng_kernel_old_tracer_version old_v; | |
534 | ||
5226f1bc | 535 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
536 | if (ret) { |
537 | goto end; | |
538 | } | |
539 | v->major = old_v.major; | |
540 | v->minor = old_v.minor; | |
541 | v->patchlevel = old_v.patchlevel; | |
542 | } else { | |
5226f1bc | 543 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
544 | } |
545 | ||
546 | end: | |
547 | return ret; | |
964ccb60 MD |
548 | } |
549 | ||
c052142c MD |
550 | int kernctl_tracer_abi_version(int fd, |
551 | struct lttng_kernel_tracer_abi_version *v) | |
552 | { | |
5226f1bc | 553 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
554 | } |
555 | ||
964ccb60 MD |
556 | int kernctl_wait_quiescent(int fd) |
557 | { | |
4dbc372b JD |
558 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
559 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
560 | } |
561 | ||
964ccb60 MD |
562 | int kernctl_buffer_flush(int fd) |
563 | { | |
5226f1bc | 564 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
565 | } |
566 | ||
f22dd891 MD |
567 | int kernctl_buffer_flush_empty(int fd) |
568 | { | |
569 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY); | |
570 | } | |
571 | ||
99930a9d JR |
572 | int kernctl_buffer_clear(int fd) |
573 | { | |
574 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR); | |
575 | } | |
576 | ||
41dc93d9 JG |
577 | int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent) |
578 | { | |
579 | return LTTNG_IOCTL_NO_CHECK(fd, | |
580 | RING_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK, | |
581 | consistent); | |
582 | } | |
583 | ||
93ec662e JD |
584 | /* returns the version of the metadata. */ |
585 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
586 | { | |
5226f1bc | 587 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
588 | } |
589 | ||
8024cc8c JD |
590 | int kernctl_metadata_cache_dump(int fd) |
591 | { | |
592 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP); | |
593 | } | |
964ccb60 MD |
594 | |
595 | /* Buffer operations */ | |
596 | ||
597 | /* For mmap mode, readable without "get" operation */ | |
598 | ||
16421f6e DG |
599 | /* returns the length to mmap. */ |
600 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
601 | { | |
5226f1bc | 602 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
603 | } |
604 | ||
964ccb60 MD |
605 | /* returns the maximum size for sub-buffers. */ |
606 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
607 | { | |
5226f1bc | 608 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
609 | } |
610 | ||
611 | /* | |
612 | * For mmap mode, operate on the current packet (between get/put or | |
613 | * get_next/put_next). | |
614 | */ | |
615 | ||
16421f6e DG |
616 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
617 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
618 | { | |
5226f1bc | 619 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
620 | } |
621 | ||
964ccb60 MD |
622 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
623 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 624 | { |
5226f1bc | 625 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
626 | } |
627 | ||
628 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
629 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
630 | { | |
5226f1bc | 631 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
632 | } |
633 | ||
964ccb60 MD |
634 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
635 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 636 | { |
5226f1bc | 637 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
638 | } |
639 | ||
d4a1283e | 640 | |
16421f6e DG |
641 | /* Release exclusive sub-buffer access, move consumer forward. */ |
642 | int kernctl_put_next_subbuf(int fd) | |
643 | { | |
5226f1bc | 644 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
645 | } |
646 | ||
964ccb60 | 647 | /* snapshot */ |
16421f6e DG |
648 | |
649 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
650 | int kernctl_snapshot(int fd) | |
651 | { | |
5226f1bc | 652 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
653 | } |
654 | ||
b007ec59 JG |
655 | /* |
656 | * Get a snapshot of the current ring buffer producer and consumer positions, | |
657 | * regardless of whether or not the two positions are contained within the | |
658 | * same sub-buffer. | |
659 | */ | |
660 | int kernctl_snapshot_sample_positions(int fd) | |
661 | { | |
662 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); | |
663 | } | |
664 | ||
16421f6e DG |
665 | /* Get the consumer position (iteration start) */ |
666 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
667 | { | |
5226f1bc | 668 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
669 | } |
670 | ||
671 | /* Get the producer position (iteration end) */ | |
672 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
673 | { | |
5226f1bc | 674 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
675 | } |
676 | ||
964ccb60 MD |
677 | /* Get exclusive read access to the specified sub-buffer position */ |
678 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 679 | { |
5226f1bc | 680 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 681 | } |
d0254c7c | 682 | |
964ccb60 MD |
683 | /* Release exclusive sub-buffer access */ |
684 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 685 | { |
5226f1bc | 686 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 687 | } |
309167d2 JD |
688 | |
689 | /* Returns the timestamp begin of the current sub-buffer. */ | |
690 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
691 | { | |
5226f1bc | 692 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
a6bd6d9b | 693 | timestamp_begin); |
309167d2 JD |
694 | } |
695 | ||
696 | /* Returns the timestamp end of the current sub-buffer. */ | |
697 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
698 | { | |
5226f1bc | 699 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
a6bd6d9b | 700 | timestamp_end); |
309167d2 JD |
701 | } |
702 | ||
703 | /* Returns the number of discarded events in the current sub-buffer. */ | |
704 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
705 | { | |
5226f1bc | 706 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
a6bd6d9b | 707 | events_discarded); |
309167d2 JD |
708 | } |
709 | ||
710 | /* Returns the content size in the current sub-buffer. */ | |
711 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
712 | { | |
5226f1bc | 713 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
a6bd6d9b | 714 | content_size); |
309167d2 JD |
715 | } |
716 | ||
717 | /* Returns the packet size in the current sub-buffer. */ | |
718 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
719 | { | |
5226f1bc JG |
720 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, |
721 | packet_size); | |
309167d2 JD |
722 | } |
723 | ||
724 | /* Returns the stream id of the current sub-buffer. */ | |
725 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
726 | { | |
5226f1bc JG |
727 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, |
728 | stream_id); | |
309167d2 | 729 | } |
d3e2ba59 JD |
730 | |
731 | /* Returns the current timestamp. */ | |
732 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
733 | { | |
5226f1bc JG |
734 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, |
735 | ts); | |
d3e2ba59 | 736 | } |
fb83fe64 JD |
737 | |
738 | /* Returns the packet sequence number of the current sub-buffer. */ | |
739 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
740 | { | |
5226f1bc | 741 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 742 | } |
000fa86f JD |
743 | |
744 | /* Returns the stream instance id. */ | |
745 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
746 | { | |
5226f1bc | 747 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 748 | } |