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> |
00a62084 | 25 | #include <errno.h> |
16421f6e | 26 | |
10a8a223 | 27 | #include "kernel-ctl.h" |
16421f6e | 28 | #include "kernel-ioctl.h" |
16421f6e | 29 | |
4dbc372b JD |
30 | /* |
31 | * This flag indicates which version of the kernel ABI to use. The old | |
32 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
33 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
34 | * deprecated and will be removed eventually. | |
35 | */ | |
36 | static int lttng_kernel_use_old_abi = -1; | |
37 | ||
38 | /* | |
39 | * Execute the new or old ioctl depending on the ABI version. | |
40 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
41 | * this function tests if the new ABI is available and otherwise fallbacks | |
42 | * on the old one. | |
43 | * This function takes the fd on which the ioctl must be executed and the old | |
44 | * and new request codes. | |
45 | * It returns the return value of the ioctl executed. | |
46 | */ | |
47 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
48 | unsigned long newname) | |
49 | { | |
50 | int ret; | |
51 | ||
52 | if (lttng_kernel_use_old_abi == -1) { | |
53 | ret = ioctl(fd, newname); | |
54 | if (!ret) { | |
55 | lttng_kernel_use_old_abi = 0; | |
56 | goto end; | |
57 | } | |
58 | lttng_kernel_use_old_abi = 1; | |
59 | } | |
60 | if (lttng_kernel_use_old_abi) { | |
61 | ret = ioctl(fd, oldname); | |
62 | } else { | |
63 | ret = ioctl(fd, newname); | |
64 | } | |
65 | ||
66 | end: | |
67 | return ret; | |
68 | } | |
69 | ||
964ccb60 | 70 | int kernctl_create_session(int fd) |
d65106b1 | 71 | { |
4dbc372b JD |
72 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
73 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
74 | } |
75 | ||
964ccb60 MD |
76 | /* open the metadata global channel */ |
77 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 78 | { |
4dbc372b JD |
79 | struct lttng_kernel_old_channel old_channel; |
80 | struct lttng_kernel_channel channel; | |
81 | ||
82 | if (lttng_kernel_use_old_abi) { | |
83 | old_channel.overwrite = chops->overwrite; | |
84 | old_channel.subbuf_size = chops->subbuf_size; | |
85 | old_channel.num_subbuf = chops->num_subbuf; | |
86 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
87 | old_channel.read_timer_interval = chops->read_timer_interval; | |
88 | old_channel.output = chops->output; | |
f853c53a DG |
89 | |
90 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
91 | /* | |
92 | * The new channel padding is smaller than the old ABI so we use the | |
93 | * new ABI padding size for the memcpy. | |
94 | */ | |
95 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
96 | |
97 | return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel); | |
98 | } | |
99 | ||
100 | channel.overwrite = chops->overwrite; | |
101 | channel.subbuf_size = chops->subbuf_size; | |
102 | channel.num_subbuf = chops->num_subbuf; | |
103 | channel.switch_timer_interval = chops->switch_timer_interval; | |
104 | channel.read_timer_interval = chops->read_timer_interval; | |
105 | channel.output = chops->output; | |
ea207e3b | 106 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
107 | |
108 | return ioctl(fd, LTTNG_KERNEL_METADATA, &channel); | |
f3ed775e DG |
109 | } |
110 | ||
111 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 112 | { |
4dbc372b JD |
113 | struct lttng_kernel_channel channel; |
114 | ||
c74101ef | 115 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
116 | if (lttng_kernel_use_old_abi) { |
117 | struct lttng_kernel_old_channel old_channel; | |
118 | ||
119 | old_channel.overwrite = chops->overwrite; | |
120 | old_channel.subbuf_size = chops->subbuf_size; | |
121 | old_channel.num_subbuf = chops->num_subbuf; | |
122 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
123 | old_channel.read_timer_interval = chops->read_timer_interval; | |
124 | old_channel.output = chops->output; | |
f853c53a DG |
125 | |
126 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
127 | /* | |
128 | * The new channel padding is smaller than the old ABI so we use the | |
129 | * new ABI padding size for the memcpy. | |
130 | */ | |
131 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
132 | |
133 | return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel); | |
134 | } | |
135 | ||
136 | channel.overwrite = chops->overwrite; | |
137 | channel.subbuf_size = chops->subbuf_size; | |
138 | channel.num_subbuf = chops->num_subbuf; | |
139 | channel.switch_timer_interval = chops->switch_timer_interval; | |
140 | channel.read_timer_interval = chops->read_timer_interval; | |
141 | channel.output = chops->output; | |
ea207e3b | 142 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
143 | |
144 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel); | |
16421f6e DG |
145 | } |
146 | ||
46820c8b MD |
147 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
148 | { | |
149 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
150 | size_t array_alloc_len; | |
151 | char *new_mask; | |
152 | int ret = 0; | |
153 | ||
154 | if (!syscall_mask) { | |
155 | ret = -1; | |
156 | goto end; | |
157 | } | |
158 | ||
159 | if (!nr_bits) { | |
160 | ret = -1; | |
161 | goto end; | |
162 | } | |
163 | ||
164 | kmask_len.len = 0; | |
165 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); | |
166 | if (ret) { | |
167 | goto end; | |
168 | } | |
169 | ||
170 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 171 | |
46820c8b MD |
172 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
173 | if (!kmask) { | |
174 | ret = -1; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | kmask->len = kmask_len.len; | |
179 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); | |
180 | if (ret) { | |
181 | goto end; | |
182 | } | |
183 | ||
834978fd | 184 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
185 | if (!new_mask) { |
186 | ret = -1; | |
187 | goto end; | |
188 | } | |
189 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
190 | *syscall_mask = new_mask; | |
191 | *nr_bits = kmask->len; | |
192 | ||
193 | end: | |
194 | free(kmask); | |
195 | return ret; | |
196 | } | |
197 | ||
ccf10263 MD |
198 | int kernctl_track_pid(int fd, int pid) |
199 | { | |
200 | return ioctl(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); | |
201 | } | |
202 | ||
203 | int kernctl_untrack_pid(int fd, int pid) | |
204 | { | |
205 | return ioctl(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); | |
206 | } | |
207 | ||
a5dfbb9d MD |
208 | int kernctl_list_tracker_pids(int fd) |
209 | { | |
210 | return ioctl(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); | |
211 | } | |
212 | ||
964ccb60 | 213 | int kernctl_create_stream(int fd) |
16421f6e | 214 | { |
4dbc372b JD |
215 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
216 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
217 | } |
218 | ||
964ccb60 | 219 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 220 | { |
4dbc372b JD |
221 | if (lttng_kernel_use_old_abi) { |
222 | struct lttng_kernel_old_event old_event; | |
223 | ||
224 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
225 | old_event.instrumentation = ev->instrumentation; | |
226 | switch (ev->instrumentation) { | |
227 | case LTTNG_KERNEL_KPROBE: | |
228 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
229 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
230 | memcpy(old_event.u.kprobe.symbol_name, | |
231 | ev->u.kprobe.symbol_name, | |
232 | sizeof(old_event.u.kprobe.symbol_name)); | |
233 | break; | |
234 | case LTTNG_KERNEL_KRETPROBE: | |
235 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
236 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
237 | memcpy(old_event.u.kretprobe.symbol_name, | |
238 | ev->u.kretprobe.symbol_name, | |
239 | sizeof(old_event.u.kretprobe.symbol_name)); | |
240 | break; | |
241 | case LTTNG_KERNEL_FUNCTION: | |
242 | memcpy(old_event.u.ftrace.symbol_name, | |
243 | ev->u.ftrace.symbol_name, | |
244 | sizeof(old_event.u.ftrace.symbol_name)); | |
245 | break; | |
246 | default: | |
247 | break; | |
248 | } | |
249 | ||
250 | return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event); | |
251 | } | |
964ccb60 | 252 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
253 | } |
254 | ||
964ccb60 | 255 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 256 | { |
4dbc372b JD |
257 | if (lttng_kernel_use_old_abi) { |
258 | struct lttng_kernel_old_context old_ctx; | |
259 | ||
260 | old_ctx.ctx = ctx->ctx; | |
261 | /* only type that uses the union */ | |
aa3514e9 | 262 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
263 | old_ctx.u.perf_counter.type = |
264 | ctx->u.perf_counter.type; | |
265 | old_ctx.u.perf_counter.config = | |
266 | ctx->u.perf_counter.config; | |
267 | memcpy(old_ctx.u.perf_counter.name, | |
268 | ctx->u.perf_counter.name, | |
269 | sizeof(old_ctx.u.perf_counter.name)); | |
270 | } | |
271 | return ioctl(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); | |
272 | } | |
964ccb60 | 273 | return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
274 | } |
275 | ||
964ccb60 | 276 | |
f3ed775e DG |
277 | /* Enable event, channel and session ioctl */ |
278 | int kernctl_enable(int fd) | |
279 | { | |
4dbc372b JD |
280 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
281 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
282 | } |
283 | ||
284 | /* Disable event, channel and session ioctl */ | |
285 | int kernctl_disable(int fd) | |
286 | { | |
4dbc372b JD |
287 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
288 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
289 | } |
290 | ||
964ccb60 | 291 | int kernctl_start_session(int fd) |
16421f6e | 292 | { |
4dbc372b JD |
293 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
294 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
295 | } |
296 | ||
297 | int kernctl_stop_session(int fd) | |
298 | { | |
4dbc372b JD |
299 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
300 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
301 | } |
302 | ||
00a62084 MD |
303 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
304 | { | |
305 | struct lttng_kernel_filter_bytecode *kb; | |
306 | uint32_t len; | |
307 | int ret; | |
308 | ||
309 | /* Translate bytecode to kernel bytecode */ | |
310 | kb = zmalloc(sizeof(*kb) + filter->len); | |
311 | if (!kb) | |
312 | return -ENOMEM; | |
313 | kb->len = len = filter->len; | |
314 | kb->reloc_offset = filter->reloc_table_offset; | |
315 | kb->seqnum = filter->seqnum; | |
316 | memcpy(kb->data, filter->data, len); | |
317 | ret = ioctl(fd, LTTNG_KERNEL_FILTER, kb); | |
318 | free(kb); | |
319 | return ret; | |
320 | } | |
321 | ||
964ccb60 MD |
322 | int kernctl_tracepoint_list(int fd) |
323 | { | |
4dbc372b JD |
324 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
325 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
326 | } |
327 | ||
d02666a9 MD |
328 | int kernctl_syscall_list(int fd) |
329 | { | |
330 | return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST); | |
331 | } | |
332 | ||
964ccb60 MD |
333 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
334 | { | |
4dbc372b JD |
335 | int ret; |
336 | ||
337 | if (lttng_kernel_use_old_abi == -1) { | |
338 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
339 | if (!ret) { | |
340 | lttng_kernel_use_old_abi = 0; | |
341 | goto end; | |
342 | } | |
343 | lttng_kernel_use_old_abi = 1; | |
344 | } | |
345 | if (lttng_kernel_use_old_abi) { | |
346 | struct lttng_kernel_old_tracer_version old_v; | |
347 | ||
348 | ret = ioctl(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); | |
349 | if (ret) { | |
350 | goto end; | |
351 | } | |
352 | v->major = old_v.major; | |
353 | v->minor = old_v.minor; | |
354 | v->patchlevel = old_v.patchlevel; | |
355 | } else { | |
356 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
357 | } | |
358 | ||
359 | end: | |
360 | return ret; | |
964ccb60 MD |
361 | } |
362 | ||
c052142c MD |
363 | int kernctl_tracer_abi_version(int fd, |
364 | struct lttng_kernel_tracer_abi_version *v) | |
365 | { | |
366 | return ioctl(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); | |
367 | } | |
368 | ||
964ccb60 MD |
369 | int kernctl_wait_quiescent(int fd) |
370 | { | |
4dbc372b JD |
371 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
372 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
373 | } |
374 | ||
375 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
376 | { | |
4dbc372b JD |
377 | int ret; |
378 | ||
379 | if (lttng_kernel_use_old_abi == -1) { | |
380 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
381 | if (!ret) { | |
382 | lttng_kernel_use_old_abi = 0; | |
383 | goto end; | |
384 | } | |
385 | lttng_kernel_use_old_abi = 1; | |
386 | } | |
387 | if (lttng_kernel_use_old_abi) { | |
388 | struct lttng_kernel_old_calibrate old_calibrate; | |
389 | ||
390 | old_calibrate.type = calibrate->type; | |
391 | ret = ioctl(fd, LTTNG_KERNEL_OLD_CALIBRATE, &old_calibrate); | |
392 | if (ret) { | |
393 | goto end; | |
394 | } | |
395 | calibrate->type = old_calibrate.type; | |
396 | } else { | |
397 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
398 | } | |
399 | ||
400 | end: | |
401 | return ret; | |
964ccb60 MD |
402 | } |
403 | ||
404 | ||
405 | int kernctl_buffer_flush(int fd) | |
406 | { | |
407 | return ioctl(fd, RING_BUFFER_FLUSH); | |
408 | } | |
409 | ||
410 | ||
411 | /* Buffer operations */ | |
412 | ||
413 | /* For mmap mode, readable without "get" operation */ | |
414 | ||
16421f6e DG |
415 | /* returns the length to mmap. */ |
416 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
417 | { | |
418 | return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len); | |
419 | } | |
420 | ||
964ccb60 MD |
421 | /* returns the maximum size for sub-buffers. */ |
422 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
423 | { | |
424 | return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); | |
425 | } | |
426 | ||
427 | /* | |
428 | * For mmap mode, operate on the current packet (between get/put or | |
429 | * get_next/put_next). | |
430 | */ | |
431 | ||
16421f6e DG |
432 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
433 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
434 | { | |
435 | return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); | |
436 | } | |
437 | ||
964ccb60 MD |
438 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
439 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 440 | { |
964ccb60 | 441 | return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
442 | } |
443 | ||
444 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
445 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
446 | { | |
447 | return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); | |
448 | } | |
449 | ||
964ccb60 MD |
450 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
451 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 452 | { |
964ccb60 | 453 | return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
454 | } |
455 | ||
d4a1283e | 456 | |
16421f6e DG |
457 | /* Release exclusive sub-buffer access, move consumer forward. */ |
458 | int kernctl_put_next_subbuf(int fd) | |
459 | { | |
460 | return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF); | |
461 | } | |
462 | ||
964ccb60 | 463 | /* snapshot */ |
16421f6e DG |
464 | |
465 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
466 | int kernctl_snapshot(int fd) | |
467 | { | |
468 | return ioctl(fd, RING_BUFFER_SNAPSHOT); | |
469 | } | |
470 | ||
471 | /* Get the consumer position (iteration start) */ | |
472 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
473 | { | |
474 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); | |
475 | } | |
476 | ||
477 | /* Get the producer position (iteration end) */ | |
478 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
479 | { | |
480 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); | |
481 | } | |
482 | ||
964ccb60 MD |
483 | /* Get exclusive read access to the specified sub-buffer position */ |
484 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 485 | { |
964ccb60 | 486 | return ioctl(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 487 | } |
d0254c7c | 488 | |
964ccb60 MD |
489 | /* Release exclusive sub-buffer access */ |
490 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 491 | { |
964ccb60 | 492 | return ioctl(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 493 | } |
309167d2 JD |
494 | |
495 | /* Returns the timestamp begin of the current sub-buffer. */ | |
496 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
497 | { | |
498 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, timestamp_begin); | |
499 | } | |
500 | ||
501 | /* Returns the timestamp end of the current sub-buffer. */ | |
502 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
503 | { | |
504 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, timestamp_end); | |
505 | } | |
506 | ||
507 | /* Returns the number of discarded events in the current sub-buffer. */ | |
508 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
509 | { | |
510 | return ioctl(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, events_discarded); | |
511 | } | |
512 | ||
513 | /* Returns the content size in the current sub-buffer. */ | |
514 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
515 | { | |
516 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, content_size); | |
517 | } | |
518 | ||
519 | /* Returns the packet size in the current sub-buffer. */ | |
520 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
521 | { | |
522 | return ioctl(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size); | |
523 | } | |
524 | ||
525 | /* Returns the stream id of the current sub-buffer. */ | |
526 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
527 | { | |
528 | return ioctl(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id); | |
529 | } | |
d3e2ba59 JD |
530 | |
531 | /* Returns the current timestamp. */ | |
532 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
533 | { | |
534 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts); | |
535 | } |