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 | |
95ba0f2f | 19 | #define __USE_LINUX_IOCTL_DEFS |
16421f6e | 20 | #include <sys/ioctl.h> |
4dbc372b | 21 | #include <string.h> |
46820c8b | 22 | #include <common/align.h> |
16421f6e | 23 | |
10a8a223 | 24 | #include "kernel-ctl.h" |
16421f6e | 25 | #include "kernel-ioctl.h" |
16421f6e | 26 | |
4dbc372b JD |
27 | /* |
28 | * This flag indicates which version of the kernel ABI to use. The old | |
29 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
30 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
31 | * deprecated and will be removed eventually. | |
32 | */ | |
33 | static int lttng_kernel_use_old_abi = -1; | |
34 | ||
35 | /* | |
36 | * Execute the new or old ioctl depending on the ABI version. | |
37 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
38 | * this function tests if the new ABI is available and otherwise fallbacks | |
39 | * on the old one. | |
40 | * This function takes the fd on which the ioctl must be executed and the old | |
41 | * and new request codes. | |
42 | * It returns the return value of the ioctl executed. | |
43 | */ | |
44 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
45 | unsigned long newname) | |
46 | { | |
47 | int ret; | |
48 | ||
49 | if (lttng_kernel_use_old_abi == -1) { | |
50 | ret = ioctl(fd, newname); | |
51 | if (!ret) { | |
52 | lttng_kernel_use_old_abi = 0; | |
53 | goto end; | |
54 | } | |
55 | lttng_kernel_use_old_abi = 1; | |
56 | } | |
57 | if (lttng_kernel_use_old_abi) { | |
58 | ret = ioctl(fd, oldname); | |
59 | } else { | |
60 | ret = ioctl(fd, newname); | |
61 | } | |
62 | ||
63 | end: | |
64 | return ret; | |
65 | } | |
66 | ||
964ccb60 | 67 | int kernctl_create_session(int fd) |
d65106b1 | 68 | { |
4dbc372b JD |
69 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
70 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
71 | } |
72 | ||
964ccb60 MD |
73 | /* open the metadata global channel */ |
74 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 75 | { |
4dbc372b JD |
76 | struct lttng_kernel_old_channel old_channel; |
77 | struct lttng_kernel_channel channel; | |
78 | ||
79 | if (lttng_kernel_use_old_abi) { | |
80 | old_channel.overwrite = chops->overwrite; | |
81 | old_channel.subbuf_size = chops->subbuf_size; | |
82 | old_channel.num_subbuf = chops->num_subbuf; | |
83 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
84 | old_channel.read_timer_interval = chops->read_timer_interval; | |
85 | old_channel.output = chops->output; | |
f853c53a DG |
86 | |
87 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
88 | /* | |
89 | * The new channel padding is smaller than the old ABI so we use the | |
90 | * new ABI padding size for the memcpy. | |
91 | */ | |
92 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
93 | |
94 | return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel); | |
95 | } | |
96 | ||
97 | channel.overwrite = chops->overwrite; | |
98 | channel.subbuf_size = chops->subbuf_size; | |
99 | channel.num_subbuf = chops->num_subbuf; | |
100 | channel.switch_timer_interval = chops->switch_timer_interval; | |
101 | channel.read_timer_interval = chops->read_timer_interval; | |
102 | channel.output = chops->output; | |
ea207e3b | 103 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
104 | |
105 | return ioctl(fd, LTTNG_KERNEL_METADATA, &channel); | |
f3ed775e DG |
106 | } |
107 | ||
108 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 109 | { |
4dbc372b JD |
110 | struct lttng_kernel_channel channel; |
111 | ||
9123d0a5 | 112 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
113 | if (lttng_kernel_use_old_abi) { |
114 | struct lttng_kernel_old_channel old_channel; | |
115 | ||
116 | old_channel.overwrite = chops->overwrite; | |
117 | old_channel.subbuf_size = chops->subbuf_size; | |
118 | old_channel.num_subbuf = chops->num_subbuf; | |
119 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
120 | old_channel.read_timer_interval = chops->read_timer_interval; | |
121 | old_channel.output = chops->output; | |
f853c53a DG |
122 | |
123 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
124 | /* | |
125 | * The new channel padding is smaller than the old ABI so we use the | |
126 | * new ABI padding size for the memcpy. | |
127 | */ | |
128 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
129 | |
130 | return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel); | |
131 | } | |
132 | ||
133 | channel.overwrite = chops->overwrite; | |
134 | channel.subbuf_size = chops->subbuf_size; | |
135 | channel.num_subbuf = chops->num_subbuf; | |
136 | channel.switch_timer_interval = chops->switch_timer_interval; | |
137 | channel.read_timer_interval = chops->read_timer_interval; | |
138 | channel.output = chops->output; | |
ea207e3b | 139 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
140 | |
141 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel); | |
16421f6e DG |
142 | } |
143 | ||
6e911cad MD |
144 | int kernctl_enable_syscall(int fd, const char *syscall_name) |
145 | { | |
146 | struct lttng_kernel_event event; | |
147 | ||
148 | memset(&event, 0, sizeof(event)); | |
149 | strncpy(event.name, syscall_name, sizeof(event.name)); | |
150 | event.name[sizeof(event.name) - 1] = '\0'; | |
151 | event.instrumentation = LTTNG_KERNEL_SYSCALL; | |
562ab9a8 | 152 | event.u.syscall.enable = 1; |
6e911cad MD |
153 | return ioctl(fd, LTTNG_KERNEL_EVENT, &event); |
154 | } | |
155 | ||
156 | int kernctl_disable_syscall(int fd, const char *syscall_name) | |
157 | { | |
158 | struct lttng_kernel_event event; | |
159 | ||
160 | memset(&event, 0, sizeof(event)); | |
161 | strncpy(event.name, syscall_name, sizeof(event.name)); | |
162 | event.name[sizeof(event.name) - 1] = '\0'; | |
163 | event.instrumentation = LTTNG_KERNEL_SYSCALL; | |
562ab9a8 | 164 | event.u.syscall.enable = 0; |
6e911cad MD |
165 | return ioctl(fd, LTTNG_KERNEL_EVENT, &event); |
166 | } | |
167 | ||
46820c8b MD |
168 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
169 | { | |
170 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
171 | size_t array_alloc_len; | |
172 | char *new_mask; | |
173 | int ret = 0; | |
174 | ||
175 | if (!syscall_mask) { | |
176 | ret = -1; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | if (!nr_bits) { | |
181 | ret = -1; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | kmask_len.len = 0; | |
186 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); | |
187 | if (ret) { | |
188 | goto end; | |
189 | } | |
190 | ||
191 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 192 | |
46820c8b MD |
193 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
194 | if (!kmask) { | |
195 | ret = -1; | |
196 | goto end; | |
197 | } | |
198 | ||
199 | kmask->len = kmask_len.len; | |
200 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); | |
201 | if (ret) { | |
202 | goto end; | |
203 | } | |
204 | ||
834978fd | 205 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
206 | if (!new_mask) { |
207 | ret = -1; | |
208 | goto end; | |
209 | } | |
210 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
211 | *syscall_mask = new_mask; | |
212 | *nr_bits = kmask->len; | |
213 | ||
214 | end: | |
215 | free(kmask); | |
216 | return ret; | |
217 | } | |
218 | ||
964ccb60 | 219 | int kernctl_create_stream(int fd) |
16421f6e | 220 | { |
4dbc372b JD |
221 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
222 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
223 | } |
224 | ||
964ccb60 | 225 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 226 | { |
4dbc372b JD |
227 | if (lttng_kernel_use_old_abi) { |
228 | struct lttng_kernel_old_event old_event; | |
229 | ||
230 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
231 | old_event.instrumentation = ev->instrumentation; | |
232 | switch (ev->instrumentation) { | |
233 | case LTTNG_KERNEL_KPROBE: | |
234 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
235 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
236 | memcpy(old_event.u.kprobe.symbol_name, | |
237 | ev->u.kprobe.symbol_name, | |
238 | sizeof(old_event.u.kprobe.symbol_name)); | |
239 | break; | |
240 | case LTTNG_KERNEL_KRETPROBE: | |
241 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
242 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
243 | memcpy(old_event.u.kretprobe.symbol_name, | |
244 | ev->u.kretprobe.symbol_name, | |
245 | sizeof(old_event.u.kretprobe.symbol_name)); | |
246 | break; | |
247 | case LTTNG_KERNEL_FUNCTION: | |
248 | memcpy(old_event.u.ftrace.symbol_name, | |
249 | ev->u.ftrace.symbol_name, | |
250 | sizeof(old_event.u.ftrace.symbol_name)); | |
251 | break; | |
252 | default: | |
253 | break; | |
254 | } | |
255 | ||
256 | return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event); | |
257 | } | |
964ccb60 | 258 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
259 | } |
260 | ||
964ccb60 | 261 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 262 | { |
4dbc372b JD |
263 | if (lttng_kernel_use_old_abi) { |
264 | struct lttng_kernel_old_context old_ctx; | |
265 | ||
266 | old_ctx.ctx = ctx->ctx; | |
267 | /* only type that uses the union */ | |
aa3514e9 | 268 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
269 | old_ctx.u.perf_counter.type = |
270 | ctx->u.perf_counter.type; | |
271 | old_ctx.u.perf_counter.config = | |
272 | ctx->u.perf_counter.config; | |
273 | memcpy(old_ctx.u.perf_counter.name, | |
274 | ctx->u.perf_counter.name, | |
275 | sizeof(old_ctx.u.perf_counter.name)); | |
276 | } | |
277 | return ioctl(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); | |
278 | } | |
964ccb60 | 279 | return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
280 | } |
281 | ||
964ccb60 | 282 | |
f3ed775e DG |
283 | /* Enable event, channel and session ioctl */ |
284 | int kernctl_enable(int fd) | |
285 | { | |
4dbc372b JD |
286 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
287 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
288 | } |
289 | ||
290 | /* Disable event, channel and session ioctl */ | |
291 | int kernctl_disable(int fd) | |
292 | { | |
4dbc372b JD |
293 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
294 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
295 | } |
296 | ||
964ccb60 | 297 | int kernctl_start_session(int fd) |
16421f6e | 298 | { |
4dbc372b JD |
299 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
300 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
301 | } |
302 | ||
303 | int kernctl_stop_session(int fd) | |
304 | { | |
4dbc372b JD |
305 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
306 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
307 | } |
308 | ||
964ccb60 MD |
309 | int kernctl_tracepoint_list(int fd) |
310 | { | |
4dbc372b JD |
311 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
312 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
313 | } |
314 | ||
d02666a9 MD |
315 | int kernctl_syscall_list(int fd) |
316 | { | |
317 | return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST); | |
318 | } | |
319 | ||
964ccb60 MD |
320 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
321 | { | |
4dbc372b JD |
322 | int ret; |
323 | ||
324 | if (lttng_kernel_use_old_abi == -1) { | |
325 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
326 | if (!ret) { | |
327 | lttng_kernel_use_old_abi = 0; | |
328 | goto end; | |
329 | } | |
330 | lttng_kernel_use_old_abi = 1; | |
331 | } | |
332 | if (lttng_kernel_use_old_abi) { | |
333 | struct lttng_kernel_old_tracer_version old_v; | |
334 | ||
335 | ret = ioctl(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); | |
336 | if (ret) { | |
337 | goto end; | |
338 | } | |
339 | v->major = old_v.major; | |
340 | v->minor = old_v.minor; | |
341 | v->patchlevel = old_v.patchlevel; | |
342 | } else { | |
343 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
344 | } | |
345 | ||
346 | end: | |
347 | return ret; | |
964ccb60 MD |
348 | } |
349 | ||
084cb5fe MD |
350 | int kernctl_tracer_abi_version(int fd, |
351 | struct lttng_kernel_tracer_abi_version *v) | |
352 | { | |
353 | return ioctl(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); | |
354 | } | |
355 | ||
964ccb60 MD |
356 | int kernctl_wait_quiescent(int fd) |
357 | { | |
4dbc372b JD |
358 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
359 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
360 | } |
361 | ||
362 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
363 | { | |
4dbc372b JD |
364 | int ret; |
365 | ||
366 | if (lttng_kernel_use_old_abi == -1) { | |
367 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
368 | if (!ret) { | |
369 | lttng_kernel_use_old_abi = 0; | |
370 | goto end; | |
371 | } | |
372 | lttng_kernel_use_old_abi = 1; | |
373 | } | |
374 | if (lttng_kernel_use_old_abi) { | |
375 | struct lttng_kernel_old_calibrate old_calibrate; | |
376 | ||
377 | old_calibrate.type = calibrate->type; | |
378 | ret = ioctl(fd, LTTNG_KERNEL_OLD_CALIBRATE, &old_calibrate); | |
379 | if (ret) { | |
380 | goto end; | |
381 | } | |
382 | calibrate->type = old_calibrate.type; | |
383 | } else { | |
384 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
385 | } | |
386 | ||
387 | end: | |
388 | return ret; | |
964ccb60 MD |
389 | } |
390 | ||
391 | ||
392 | int kernctl_buffer_flush(int fd) | |
393 | { | |
394 | return ioctl(fd, RING_BUFFER_FLUSH); | |
395 | } | |
396 | ||
397 | ||
398 | /* Buffer operations */ | |
399 | ||
400 | /* For mmap mode, readable without "get" operation */ | |
401 | ||
16421f6e DG |
402 | /* returns the length to mmap. */ |
403 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
404 | { | |
405 | return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len); | |
406 | } | |
407 | ||
964ccb60 MD |
408 | /* returns the maximum size for sub-buffers. */ |
409 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
410 | { | |
411 | return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); | |
412 | } | |
413 | ||
414 | /* | |
415 | * For mmap mode, operate on the current packet (between get/put or | |
416 | * get_next/put_next). | |
417 | */ | |
418 | ||
16421f6e DG |
419 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
420 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
421 | { | |
422 | return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); | |
423 | } | |
424 | ||
964ccb60 MD |
425 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
426 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 427 | { |
964ccb60 | 428 | return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
429 | } |
430 | ||
431 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
432 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
433 | { | |
434 | return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); | |
435 | } | |
436 | ||
964ccb60 MD |
437 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
438 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 439 | { |
964ccb60 | 440 | return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
441 | } |
442 | ||
d4a1283e | 443 | |
16421f6e DG |
444 | /* Release exclusive sub-buffer access, move consumer forward. */ |
445 | int kernctl_put_next_subbuf(int fd) | |
446 | { | |
447 | return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF); | |
448 | } | |
449 | ||
964ccb60 | 450 | /* snapshot */ |
16421f6e DG |
451 | |
452 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
453 | int kernctl_snapshot(int fd) | |
454 | { | |
455 | return ioctl(fd, RING_BUFFER_SNAPSHOT); | |
456 | } | |
457 | ||
458 | /* Get the consumer position (iteration start) */ | |
459 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
460 | { | |
461 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); | |
462 | } | |
463 | ||
464 | /* Get the producer position (iteration end) */ | |
465 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
466 | { | |
467 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); | |
468 | } | |
469 | ||
964ccb60 MD |
470 | /* Get exclusive read access to the specified sub-buffer position */ |
471 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 472 | { |
964ccb60 | 473 | return ioctl(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 474 | } |
d0254c7c | 475 | |
964ccb60 MD |
476 | /* Release exclusive sub-buffer access */ |
477 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 478 | { |
964ccb60 | 479 | return ioctl(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 480 | } |
309167d2 JD |
481 | |
482 | /* Returns the timestamp begin of the current sub-buffer. */ | |
483 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
484 | { | |
485 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, timestamp_begin); | |
486 | } | |
487 | ||
488 | /* Returns the timestamp end of the current sub-buffer. */ | |
489 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
490 | { | |
491 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, timestamp_end); | |
492 | } | |
493 | ||
494 | /* Returns the number of discarded events in the current sub-buffer. */ | |
495 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
496 | { | |
497 | return ioctl(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, events_discarded); | |
498 | } | |
499 | ||
500 | /* Returns the content size in the current sub-buffer. */ | |
501 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
502 | { | |
503 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, content_size); | |
504 | } | |
505 | ||
506 | /* Returns the packet size in the current sub-buffer. */ | |
507 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
508 | { | |
509 | return ioctl(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size); | |
510 | } | |
511 | ||
512 | /* Returns the stream id of the current sub-buffer. */ | |
513 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
514 | { | |
515 | return ioctl(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id); | |
516 | } | |
d3e2ba59 JD |
517 | |
518 | /* Returns the current timestamp. */ | |
519 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
520 | { | |
521 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts); | |
522 | } |