Commit | Line | Data |
---|---|---|
ee0326c0 | 1 | /* |
16421f6e DG |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
ee0326c0 | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
ee0326c0 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
ee0326c0 | 17 | */ |
16421f6e | 18 | |
6c1c0768 MD |
19 | #define _GNU_SOURCE |
20 | #define _LGPL_SOURCE | |
95ba0f2f | 21 | #define __USE_LINUX_IOCTL_DEFS |
16421f6e | 22 | #include <sys/ioctl.h> |
4dbc372b | 23 | #include <string.h> |
46820c8b | 24 | #include <common/align.h> |
16421f6e | 25 | |
10a8a223 | 26 | #include "kernel-ctl.h" |
16421f6e | 27 | #include "kernel-ioctl.h" |
16421f6e | 28 | |
4dbc372b JD |
29 | /* |
30 | * This flag indicates which version of the kernel ABI to use. The old | |
31 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
32 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
33 | * deprecated and will be removed eventually. | |
34 | */ | |
35 | static int lttng_kernel_use_old_abi = -1; | |
36 | ||
37 | /* | |
38 | * Execute the new or old ioctl depending on the ABI version. | |
39 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
40 | * this function tests if the new ABI is available and otherwise fallbacks | |
41 | * on the old one. | |
42 | * This function takes the fd on which the ioctl must be executed and the old | |
43 | * and new request codes. | |
44 | * It returns the return value of the ioctl executed. | |
45 | */ | |
46 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
47 | unsigned long newname) | |
48 | { | |
49 | int ret; | |
50 | ||
51 | if (lttng_kernel_use_old_abi == -1) { | |
52 | ret = ioctl(fd, newname); | |
53 | if (!ret) { | |
54 | lttng_kernel_use_old_abi = 0; | |
55 | goto end; | |
56 | } | |
57 | lttng_kernel_use_old_abi = 1; | |
58 | } | |
59 | if (lttng_kernel_use_old_abi) { | |
60 | ret = ioctl(fd, oldname); | |
61 | } else { | |
62 | ret = ioctl(fd, newname); | |
63 | } | |
64 | ||
65 | end: | |
66 | return ret; | |
67 | } | |
68 | ||
964ccb60 | 69 | int kernctl_create_session(int fd) |
d65106b1 | 70 | { |
4dbc372b JD |
71 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
72 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
73 | } |
74 | ||
964ccb60 MD |
75 | /* open the metadata global channel */ |
76 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 77 | { |
4dbc372b JD |
78 | struct lttng_kernel_old_channel old_channel; |
79 | struct lttng_kernel_channel channel; | |
80 | ||
81 | if (lttng_kernel_use_old_abi) { | |
82 | old_channel.overwrite = chops->overwrite; | |
83 | old_channel.subbuf_size = chops->subbuf_size; | |
84 | old_channel.num_subbuf = chops->num_subbuf; | |
85 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
86 | old_channel.read_timer_interval = chops->read_timer_interval; | |
87 | old_channel.output = chops->output; | |
f853c53a DG |
88 | |
89 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
90 | /* | |
91 | * The new channel padding is smaller than the old ABI so we use the | |
92 | * new ABI padding size for the memcpy. | |
93 | */ | |
94 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
95 | |
96 | return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel); | |
97 | } | |
98 | ||
99 | channel.overwrite = chops->overwrite; | |
100 | channel.subbuf_size = chops->subbuf_size; | |
101 | channel.num_subbuf = chops->num_subbuf; | |
102 | channel.switch_timer_interval = chops->switch_timer_interval; | |
103 | channel.read_timer_interval = chops->read_timer_interval; | |
104 | channel.output = chops->output; | |
ea207e3b | 105 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
106 | |
107 | return ioctl(fd, LTTNG_KERNEL_METADATA, &channel); | |
f3ed775e DG |
108 | } |
109 | ||
110 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 111 | { |
4dbc372b JD |
112 | struct lttng_kernel_channel channel; |
113 | ||
114 | if (lttng_kernel_use_old_abi) { | |
115 | struct lttng_kernel_old_channel old_channel; | |
116 | ||
117 | old_channel.overwrite = chops->overwrite; | |
118 | old_channel.subbuf_size = chops->subbuf_size; | |
119 | old_channel.num_subbuf = chops->num_subbuf; | |
120 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
121 | old_channel.read_timer_interval = chops->read_timer_interval; | |
122 | old_channel.output = chops->output; | |
f853c53a DG |
123 | |
124 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
125 | /* | |
126 | * The new channel padding is smaller than the old ABI so we use the | |
127 | * new ABI padding size for the memcpy. | |
128 | */ | |
129 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
130 | |
131 | return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel); | |
132 | } | |
133 | ||
134 | channel.overwrite = chops->overwrite; | |
135 | channel.subbuf_size = chops->subbuf_size; | |
136 | channel.num_subbuf = chops->num_subbuf; | |
137 | channel.switch_timer_interval = chops->switch_timer_interval; | |
138 | channel.read_timer_interval = chops->read_timer_interval; | |
139 | channel.output = chops->output; | |
ea207e3b | 140 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
141 | |
142 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel); | |
16421f6e DG |
143 | } |
144 | ||
6e911cad MD |
145 | int kernctl_enable_syscall(int fd, const char *syscall_name) |
146 | { | |
147 | struct lttng_kernel_event event; | |
148 | ||
149 | memset(&event, 0, sizeof(event)); | |
150 | strncpy(event.name, syscall_name, sizeof(event.name)); | |
151 | event.name[sizeof(event.name) - 1] = '\0'; | |
152 | event.instrumentation = LTTNG_KERNEL_SYSCALL; | |
562ab9a8 | 153 | event.u.syscall.enable = 1; |
6e911cad MD |
154 | return ioctl(fd, LTTNG_KERNEL_EVENT, &event); |
155 | } | |
156 | ||
157 | int kernctl_disable_syscall(int fd, const char *syscall_name) | |
158 | { | |
159 | struct lttng_kernel_event event; | |
160 | ||
161 | memset(&event, 0, sizeof(event)); | |
162 | strncpy(event.name, syscall_name, sizeof(event.name)); | |
163 | event.name[sizeof(event.name) - 1] = '\0'; | |
164 | event.instrumentation = LTTNG_KERNEL_SYSCALL; | |
562ab9a8 | 165 | event.u.syscall.enable = 0; |
6e911cad MD |
166 | return ioctl(fd, LTTNG_KERNEL_EVENT, &event); |
167 | } | |
168 | ||
46820c8b MD |
169 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
170 | { | |
171 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
172 | size_t array_alloc_len; | |
173 | char *new_mask; | |
174 | int ret = 0; | |
175 | ||
176 | if (!syscall_mask) { | |
177 | ret = -1; | |
178 | goto end; | |
179 | } | |
180 | ||
181 | if (!nr_bits) { | |
182 | ret = -1; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | kmask_len.len = 0; | |
187 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); | |
188 | if (ret) { | |
189 | goto end; | |
190 | } | |
191 | ||
192 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 193 | |
46820c8b MD |
194 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
195 | if (!kmask) { | |
196 | ret = -1; | |
197 | goto end; | |
198 | } | |
199 | ||
200 | kmask->len = kmask_len.len; | |
201 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); | |
202 | if (ret) { | |
203 | goto end; | |
204 | } | |
205 | ||
834978fd | 206 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
207 | if (!new_mask) { |
208 | ret = -1; | |
209 | goto end; | |
210 | } | |
211 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
212 | *syscall_mask = new_mask; | |
213 | *nr_bits = kmask->len; | |
214 | ||
215 | end: | |
216 | free(kmask); | |
217 | return ret; | |
218 | } | |
219 | ||
964ccb60 | 220 | int kernctl_create_stream(int fd) |
16421f6e | 221 | { |
4dbc372b JD |
222 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
223 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
224 | } |
225 | ||
964ccb60 | 226 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 227 | { |
4dbc372b JD |
228 | if (lttng_kernel_use_old_abi) { |
229 | struct lttng_kernel_old_event old_event; | |
230 | ||
231 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
232 | old_event.instrumentation = ev->instrumentation; | |
233 | switch (ev->instrumentation) { | |
234 | case LTTNG_KERNEL_KPROBE: | |
235 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
236 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
237 | memcpy(old_event.u.kprobe.symbol_name, | |
238 | ev->u.kprobe.symbol_name, | |
239 | sizeof(old_event.u.kprobe.symbol_name)); | |
240 | break; | |
241 | case LTTNG_KERNEL_KRETPROBE: | |
242 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
243 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
244 | memcpy(old_event.u.kretprobe.symbol_name, | |
245 | ev->u.kretprobe.symbol_name, | |
246 | sizeof(old_event.u.kretprobe.symbol_name)); | |
247 | break; | |
248 | case LTTNG_KERNEL_FUNCTION: | |
249 | memcpy(old_event.u.ftrace.symbol_name, | |
250 | ev->u.ftrace.symbol_name, | |
251 | sizeof(old_event.u.ftrace.symbol_name)); | |
252 | break; | |
253 | default: | |
254 | break; | |
255 | } | |
256 | ||
257 | return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event); | |
258 | } | |
964ccb60 | 259 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
260 | } |
261 | ||
964ccb60 | 262 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 263 | { |
4dbc372b JD |
264 | if (lttng_kernel_use_old_abi) { |
265 | struct lttng_kernel_old_context old_ctx; | |
266 | ||
267 | old_ctx.ctx = ctx->ctx; | |
268 | /* only type that uses the union */ | |
aa3514e9 | 269 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
270 | old_ctx.u.perf_counter.type = |
271 | ctx->u.perf_counter.type; | |
272 | old_ctx.u.perf_counter.config = | |
273 | ctx->u.perf_counter.config; | |
274 | memcpy(old_ctx.u.perf_counter.name, | |
275 | ctx->u.perf_counter.name, | |
276 | sizeof(old_ctx.u.perf_counter.name)); | |
277 | } | |
278 | return ioctl(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); | |
279 | } | |
964ccb60 | 280 | return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
281 | } |
282 | ||
964ccb60 | 283 | |
f3ed775e DG |
284 | /* Enable event, channel and session ioctl */ |
285 | int kernctl_enable(int fd) | |
286 | { | |
4dbc372b JD |
287 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
288 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
289 | } |
290 | ||
291 | /* Disable event, channel and session ioctl */ | |
292 | int kernctl_disable(int fd) | |
293 | { | |
4dbc372b JD |
294 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
295 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
296 | } |
297 | ||
964ccb60 | 298 | int kernctl_start_session(int fd) |
16421f6e | 299 | { |
4dbc372b JD |
300 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
301 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
302 | } |
303 | ||
304 | int kernctl_stop_session(int fd) | |
305 | { | |
4dbc372b JD |
306 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
307 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
308 | } |
309 | ||
964ccb60 MD |
310 | int kernctl_tracepoint_list(int fd) |
311 | { | |
4dbc372b JD |
312 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
313 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
314 | } |
315 | ||
d02666a9 MD |
316 | int kernctl_syscall_list(int fd) |
317 | { | |
318 | return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST); | |
319 | } | |
320 | ||
964ccb60 MD |
321 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
322 | { | |
4dbc372b JD |
323 | int ret; |
324 | ||
325 | if (lttng_kernel_use_old_abi == -1) { | |
326 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
327 | if (!ret) { | |
328 | lttng_kernel_use_old_abi = 0; | |
329 | goto end; | |
330 | } | |
331 | lttng_kernel_use_old_abi = 1; | |
332 | } | |
333 | if (lttng_kernel_use_old_abi) { | |
334 | struct lttng_kernel_old_tracer_version old_v; | |
335 | ||
336 | ret = ioctl(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); | |
337 | if (ret) { | |
338 | goto end; | |
339 | } | |
340 | v->major = old_v.major; | |
341 | v->minor = old_v.minor; | |
342 | v->patchlevel = old_v.patchlevel; | |
343 | } else { | |
344 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
345 | } | |
346 | ||
347 | end: | |
348 | return ret; | |
964ccb60 MD |
349 | } |
350 | ||
c052142c MD |
351 | int kernctl_tracer_abi_version(int fd, |
352 | struct lttng_kernel_tracer_abi_version *v) | |
353 | { | |
354 | return ioctl(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); | |
355 | } | |
356 | ||
964ccb60 MD |
357 | int kernctl_wait_quiescent(int fd) |
358 | { | |
4dbc372b JD |
359 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
360 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
361 | } |
362 | ||
363 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
364 | { | |
4dbc372b JD |
365 | int ret; |
366 | ||
367 | if (lttng_kernel_use_old_abi == -1) { | |
368 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
369 | if (!ret) { | |
370 | lttng_kernel_use_old_abi = 0; | |
371 | goto end; | |
372 | } | |
373 | lttng_kernel_use_old_abi = 1; | |
374 | } | |
375 | if (lttng_kernel_use_old_abi) { | |
376 | struct lttng_kernel_old_calibrate old_calibrate; | |
377 | ||
378 | old_calibrate.type = calibrate->type; | |
379 | ret = ioctl(fd, LTTNG_KERNEL_OLD_CALIBRATE, &old_calibrate); | |
380 | if (ret) { | |
381 | goto end; | |
382 | } | |
383 | calibrate->type = old_calibrate.type; | |
384 | } else { | |
385 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
386 | } | |
387 | ||
388 | end: | |
389 | return ret; | |
964ccb60 MD |
390 | } |
391 | ||
392 | ||
393 | int kernctl_buffer_flush(int fd) | |
394 | { | |
395 | return ioctl(fd, RING_BUFFER_FLUSH); | |
396 | } | |
397 | ||
398 | ||
399 | /* Buffer operations */ | |
400 | ||
401 | /* For mmap mode, readable without "get" operation */ | |
402 | ||
16421f6e DG |
403 | /* returns the length to mmap. */ |
404 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
405 | { | |
406 | return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len); | |
407 | } | |
408 | ||
964ccb60 MD |
409 | /* returns the maximum size for sub-buffers. */ |
410 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
411 | { | |
412 | return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); | |
413 | } | |
414 | ||
415 | /* | |
416 | * For mmap mode, operate on the current packet (between get/put or | |
417 | * get_next/put_next). | |
418 | */ | |
419 | ||
16421f6e DG |
420 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
421 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
422 | { | |
423 | return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); | |
424 | } | |
425 | ||
964ccb60 MD |
426 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
427 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 428 | { |
964ccb60 | 429 | return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
430 | } |
431 | ||
432 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
433 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
434 | { | |
435 | return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); | |
436 | } | |
437 | ||
964ccb60 MD |
438 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
439 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 440 | { |
964ccb60 | 441 | return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
442 | } |
443 | ||
d4a1283e | 444 | |
16421f6e DG |
445 | /* Release exclusive sub-buffer access, move consumer forward. */ |
446 | int kernctl_put_next_subbuf(int fd) | |
447 | { | |
448 | return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF); | |
449 | } | |
450 | ||
964ccb60 | 451 | /* snapshot */ |
16421f6e DG |
452 | |
453 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
454 | int kernctl_snapshot(int fd) | |
455 | { | |
456 | return ioctl(fd, RING_BUFFER_SNAPSHOT); | |
457 | } | |
458 | ||
459 | /* Get the consumer position (iteration start) */ | |
460 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
461 | { | |
462 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); | |
463 | } | |
464 | ||
465 | /* Get the producer position (iteration end) */ | |
466 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
467 | { | |
468 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); | |
469 | } | |
470 | ||
964ccb60 MD |
471 | /* Get exclusive read access to the specified sub-buffer position */ |
472 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 473 | { |
964ccb60 | 474 | return ioctl(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 475 | } |
d0254c7c | 476 | |
964ccb60 MD |
477 | /* Release exclusive sub-buffer access */ |
478 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 479 | { |
964ccb60 | 480 | return ioctl(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 481 | } |
309167d2 JD |
482 | |
483 | /* Returns the timestamp begin of the current sub-buffer. */ | |
484 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
485 | { | |
486 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, timestamp_begin); | |
487 | } | |
488 | ||
489 | /* Returns the timestamp end of the current sub-buffer. */ | |
490 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
491 | { | |
492 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, timestamp_end); | |
493 | } | |
494 | ||
495 | /* Returns the number of discarded events in the current sub-buffer. */ | |
496 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
497 | { | |
498 | return ioctl(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, events_discarded); | |
499 | } | |
500 | ||
501 | /* Returns the content size in the current sub-buffer. */ | |
502 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
503 | { | |
504 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, content_size); | |
505 | } | |
506 | ||
507 | /* Returns the packet size in the current sub-buffer. */ | |
508 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
509 | { | |
510 | return ioctl(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size); | |
511 | } | |
512 | ||
513 | /* Returns the stream id of the current sub-buffer. */ | |
514 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
515 | { | |
516 | return ioctl(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id); | |
517 | } | |
d3e2ba59 JD |
518 | |
519 | /* Returns the current timestamp. */ | |
520 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
521 | { | |
522 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts); | |
523 | } |