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 | 19 | #define _LGPL_SOURCE |
95ba0f2f | 20 | #define __USE_LINUX_IOCTL_DEFS |
16421f6e | 21 | #include <sys/ioctl.h> |
4dbc372b | 22 | #include <string.h> |
46820c8b | 23 | #include <common/align.h> |
00a62084 | 24 | #include <errno.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 | ||
c74101ef | 114 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
115 | if (lttng_kernel_use_old_abi) { |
116 | struct lttng_kernel_old_channel old_channel; | |
117 | ||
118 | old_channel.overwrite = chops->overwrite; | |
119 | old_channel.subbuf_size = chops->subbuf_size; | |
120 | old_channel.num_subbuf = chops->num_subbuf; | |
121 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
122 | old_channel.read_timer_interval = chops->read_timer_interval; | |
123 | old_channel.output = chops->output; | |
f853c53a DG |
124 | |
125 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
126 | /* | |
127 | * The new channel padding is smaller than the old ABI so we use the | |
128 | * new ABI padding size for the memcpy. | |
129 | */ | |
130 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
131 | |
132 | return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel); | |
133 | } | |
134 | ||
135 | channel.overwrite = chops->overwrite; | |
136 | channel.subbuf_size = chops->subbuf_size; | |
137 | channel.num_subbuf = chops->num_subbuf; | |
138 | channel.switch_timer_interval = chops->switch_timer_interval; | |
139 | channel.read_timer_interval = chops->read_timer_interval; | |
140 | channel.output = chops->output; | |
ea207e3b | 141 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
142 | |
143 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel); | |
16421f6e DG |
144 | } |
145 | ||
46820c8b MD |
146 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
147 | { | |
148 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
149 | size_t array_alloc_len; | |
150 | char *new_mask; | |
151 | int ret = 0; | |
152 | ||
153 | if (!syscall_mask) { | |
154 | ret = -1; | |
155 | goto end; | |
156 | } | |
157 | ||
158 | if (!nr_bits) { | |
159 | ret = -1; | |
160 | goto end; | |
161 | } | |
162 | ||
163 | kmask_len.len = 0; | |
164 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); | |
165 | if (ret) { | |
166 | goto end; | |
167 | } | |
168 | ||
169 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 170 | |
46820c8b MD |
171 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
172 | if (!kmask) { | |
173 | ret = -1; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | kmask->len = kmask_len.len; | |
178 | ret = ioctl(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); | |
179 | if (ret) { | |
180 | goto end; | |
181 | } | |
182 | ||
834978fd | 183 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
184 | if (!new_mask) { |
185 | ret = -1; | |
186 | goto end; | |
187 | } | |
188 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
189 | *syscall_mask = new_mask; | |
190 | *nr_bits = kmask->len; | |
191 | ||
192 | end: | |
193 | free(kmask); | |
194 | return ret; | |
195 | } | |
196 | ||
ccf10263 MD |
197 | int kernctl_track_pid(int fd, int pid) |
198 | { | |
199 | return ioctl(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); | |
200 | } | |
201 | ||
202 | int kernctl_untrack_pid(int fd, int pid) | |
203 | { | |
204 | return ioctl(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); | |
205 | } | |
206 | ||
a5dfbb9d MD |
207 | int kernctl_list_tracker_pids(int fd) |
208 | { | |
209 | return ioctl(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); | |
210 | } | |
211 | ||
964ccb60 | 212 | int kernctl_create_stream(int fd) |
16421f6e | 213 | { |
4dbc372b JD |
214 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
215 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
216 | } |
217 | ||
964ccb60 | 218 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 219 | { |
4dbc372b JD |
220 | if (lttng_kernel_use_old_abi) { |
221 | struct lttng_kernel_old_event old_event; | |
222 | ||
223 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
224 | old_event.instrumentation = ev->instrumentation; | |
225 | switch (ev->instrumentation) { | |
226 | case LTTNG_KERNEL_KPROBE: | |
227 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
228 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
229 | memcpy(old_event.u.kprobe.symbol_name, | |
230 | ev->u.kprobe.symbol_name, | |
231 | sizeof(old_event.u.kprobe.symbol_name)); | |
232 | break; | |
233 | case LTTNG_KERNEL_KRETPROBE: | |
234 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
235 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
236 | memcpy(old_event.u.kretprobe.symbol_name, | |
237 | ev->u.kretprobe.symbol_name, | |
238 | sizeof(old_event.u.kretprobe.symbol_name)); | |
239 | break; | |
240 | case LTTNG_KERNEL_FUNCTION: | |
241 | memcpy(old_event.u.ftrace.symbol_name, | |
242 | ev->u.ftrace.symbol_name, | |
243 | sizeof(old_event.u.ftrace.symbol_name)); | |
244 | break; | |
245 | default: | |
246 | break; | |
247 | } | |
248 | ||
249 | return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event); | |
250 | } | |
964ccb60 | 251 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
252 | } |
253 | ||
964ccb60 | 254 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 255 | { |
4dbc372b JD |
256 | if (lttng_kernel_use_old_abi) { |
257 | struct lttng_kernel_old_context old_ctx; | |
258 | ||
259 | old_ctx.ctx = ctx->ctx; | |
260 | /* only type that uses the union */ | |
aa3514e9 | 261 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
262 | old_ctx.u.perf_counter.type = |
263 | ctx->u.perf_counter.type; | |
264 | old_ctx.u.perf_counter.config = | |
265 | ctx->u.perf_counter.config; | |
266 | memcpy(old_ctx.u.perf_counter.name, | |
267 | ctx->u.perf_counter.name, | |
268 | sizeof(old_ctx.u.perf_counter.name)); | |
269 | } | |
270 | return ioctl(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); | |
271 | } | |
964ccb60 | 272 | return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
273 | } |
274 | ||
964ccb60 | 275 | |
f3ed775e DG |
276 | /* Enable event, channel and session ioctl */ |
277 | int kernctl_enable(int fd) | |
278 | { | |
4dbc372b JD |
279 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
280 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
281 | } |
282 | ||
283 | /* Disable event, channel and session ioctl */ | |
284 | int kernctl_disable(int fd) | |
285 | { | |
4dbc372b JD |
286 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
287 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
288 | } |
289 | ||
964ccb60 | 290 | int kernctl_start_session(int fd) |
16421f6e | 291 | { |
4dbc372b JD |
292 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
293 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
294 | } |
295 | ||
296 | int kernctl_stop_session(int fd) | |
297 | { | |
4dbc372b JD |
298 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
299 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
300 | } |
301 | ||
00a62084 MD |
302 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
303 | { | |
304 | struct lttng_kernel_filter_bytecode *kb; | |
305 | uint32_t len; | |
306 | int ret; | |
307 | ||
308 | /* Translate bytecode to kernel bytecode */ | |
309 | kb = zmalloc(sizeof(*kb) + filter->len); | |
310 | if (!kb) | |
311 | return -ENOMEM; | |
312 | kb->len = len = filter->len; | |
313 | kb->reloc_offset = filter->reloc_table_offset; | |
314 | kb->seqnum = filter->seqnum; | |
315 | memcpy(kb->data, filter->data, len); | |
316 | ret = ioctl(fd, LTTNG_KERNEL_FILTER, kb); | |
317 | free(kb); | |
318 | return ret; | |
319 | } | |
320 | ||
964ccb60 MD |
321 | int kernctl_tracepoint_list(int fd) |
322 | { | |
4dbc372b JD |
323 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
324 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
325 | } |
326 | ||
d02666a9 MD |
327 | int kernctl_syscall_list(int fd) |
328 | { | |
329 | return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST); | |
330 | } | |
331 | ||
964ccb60 MD |
332 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
333 | { | |
4dbc372b JD |
334 | int ret; |
335 | ||
336 | if (lttng_kernel_use_old_abi == -1) { | |
337 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
338 | if (!ret) { | |
339 | lttng_kernel_use_old_abi = 0; | |
340 | goto end; | |
341 | } | |
342 | lttng_kernel_use_old_abi = 1; | |
343 | } | |
344 | if (lttng_kernel_use_old_abi) { | |
345 | struct lttng_kernel_old_tracer_version old_v; | |
346 | ||
347 | ret = ioctl(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); | |
348 | if (ret) { | |
349 | goto end; | |
350 | } | |
351 | v->major = old_v.major; | |
352 | v->minor = old_v.minor; | |
353 | v->patchlevel = old_v.patchlevel; | |
354 | } else { | |
355 | ret = ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); | |
356 | } | |
357 | ||
358 | end: | |
359 | return ret; | |
964ccb60 MD |
360 | } |
361 | ||
c052142c MD |
362 | int kernctl_tracer_abi_version(int fd, |
363 | struct lttng_kernel_tracer_abi_version *v) | |
364 | { | |
365 | return ioctl(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); | |
366 | } | |
367 | ||
964ccb60 MD |
368 | int kernctl_wait_quiescent(int fd) |
369 | { | |
4dbc372b JD |
370 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
371 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
372 | } |
373 | ||
374 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
375 | { | |
4dbc372b JD |
376 | int ret; |
377 | ||
378 | if (lttng_kernel_use_old_abi == -1) { | |
379 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
380 | if (!ret) { | |
381 | lttng_kernel_use_old_abi = 0; | |
382 | goto end; | |
383 | } | |
384 | lttng_kernel_use_old_abi = 1; | |
385 | } | |
386 | if (lttng_kernel_use_old_abi) { | |
387 | struct lttng_kernel_old_calibrate old_calibrate; | |
388 | ||
389 | old_calibrate.type = calibrate->type; | |
390 | ret = ioctl(fd, LTTNG_KERNEL_OLD_CALIBRATE, &old_calibrate); | |
391 | if (ret) { | |
392 | goto end; | |
393 | } | |
394 | calibrate->type = old_calibrate.type; | |
395 | } else { | |
396 | ret = ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); | |
397 | } | |
398 | ||
399 | end: | |
400 | return ret; | |
964ccb60 MD |
401 | } |
402 | ||
403 | ||
404 | int kernctl_buffer_flush(int fd) | |
405 | { | |
406 | return ioctl(fd, RING_BUFFER_FLUSH); | |
407 | } | |
408 | ||
409 | ||
410 | /* Buffer operations */ | |
411 | ||
412 | /* For mmap mode, readable without "get" operation */ | |
413 | ||
16421f6e DG |
414 | /* returns the length to mmap. */ |
415 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
416 | { | |
417 | return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len); | |
418 | } | |
419 | ||
964ccb60 MD |
420 | /* returns the maximum size for sub-buffers. */ |
421 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
422 | { | |
423 | return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); | |
424 | } | |
425 | ||
426 | /* | |
427 | * For mmap mode, operate on the current packet (between get/put or | |
428 | * get_next/put_next). | |
429 | */ | |
430 | ||
16421f6e DG |
431 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
432 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
433 | { | |
434 | return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); | |
435 | } | |
436 | ||
964ccb60 MD |
437 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
438 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 439 | { |
964ccb60 | 440 | return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
441 | } |
442 | ||
443 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
444 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
445 | { | |
446 | return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); | |
447 | } | |
448 | ||
964ccb60 MD |
449 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
450 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 451 | { |
964ccb60 | 452 | return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
453 | } |
454 | ||
d4a1283e | 455 | |
16421f6e DG |
456 | /* Release exclusive sub-buffer access, move consumer forward. */ |
457 | int kernctl_put_next_subbuf(int fd) | |
458 | { | |
459 | return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF); | |
460 | } | |
461 | ||
964ccb60 | 462 | /* snapshot */ |
16421f6e DG |
463 | |
464 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
465 | int kernctl_snapshot(int fd) | |
466 | { | |
467 | return ioctl(fd, RING_BUFFER_SNAPSHOT); | |
468 | } | |
469 | ||
470 | /* Get the consumer position (iteration start) */ | |
471 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
472 | { | |
473 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); | |
474 | } | |
475 | ||
476 | /* Get the producer position (iteration end) */ | |
477 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
478 | { | |
479 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); | |
480 | } | |
481 | ||
964ccb60 MD |
482 | /* Get exclusive read access to the specified sub-buffer position */ |
483 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 484 | { |
964ccb60 | 485 | return ioctl(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 486 | } |
d0254c7c | 487 | |
964ccb60 MD |
488 | /* Release exclusive sub-buffer access */ |
489 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 490 | { |
964ccb60 | 491 | return ioctl(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 492 | } |
309167d2 JD |
493 | |
494 | /* Returns the timestamp begin of the current sub-buffer. */ | |
495 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
496 | { | |
497 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, timestamp_begin); | |
498 | } | |
499 | ||
500 | /* Returns the timestamp end of the current sub-buffer. */ | |
501 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
502 | { | |
503 | return ioctl(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, timestamp_end); | |
504 | } | |
505 | ||
506 | /* Returns the number of discarded events in the current sub-buffer. */ | |
507 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
508 | { | |
509 | return ioctl(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, events_discarded); | |
510 | } | |
511 | ||
512 | /* Returns the content size in the current sub-buffer. */ | |
513 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
514 | { | |
515 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, content_size); | |
516 | } | |
517 | ||
518 | /* Returns the packet size in the current sub-buffer. */ | |
519 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
520 | { | |
521 | return ioctl(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size); | |
522 | } | |
523 | ||
524 | /* Returns the stream id of the current sub-buffer. */ | |
525 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
526 | { | |
527 | return ioctl(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id); | |
528 | } | |
d3e2ba59 JD |
529 | |
530 | /* Returns the current timestamp. */ | |
531 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
532 | { | |
533 | return ioctl(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts); | |
534 | } |