Commit | Line | Data |
---|---|---|
ee0326c0 | 1 | /* |
16421f6e DG |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
9bb29afd | 4 | * 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
ee0326c0 | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
ee0326c0 DG |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
ee0326c0 | 18 | */ |
16421f6e | 19 | |
6c1c0768 | 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> |
9bb29afd JG |
26 | #include <stdarg.h> |
27 | #include <assert.h> | |
16421f6e | 28 | |
10a8a223 | 29 | #include "kernel-ctl.h" |
16421f6e | 30 | #include "kernel-ioctl.h" |
16421f6e | 31 | |
9bb29afd JG |
32 | #define LTTNG_IOCTL(fildes, request, ...) ({ \ |
33 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ | |
34 | assert(ret <= 0); \ | |
35 | ret ? -errno : 0; \ | |
36 | }) | |
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) { | |
61 | ret = ioctl(fd, newname); | |
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) { | |
69 | ret = ioctl(fd, oldname); | |
70 | } else { | |
71 | ret = ioctl(fd, newname); | |
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_old_channel old_channel; |
88 | struct lttng_kernel_channel channel; | |
89 | ||
90 | if (lttng_kernel_use_old_abi) { | |
91 | old_channel.overwrite = chops->overwrite; | |
92 | old_channel.subbuf_size = chops->subbuf_size; | |
93 | old_channel.num_subbuf = chops->num_subbuf; | |
94 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
95 | old_channel.read_timer_interval = chops->read_timer_interval; | |
96 | old_channel.output = chops->output; | |
f853c53a DG |
97 | |
98 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
99 | /* | |
100 | * The new channel padding is smaller than the old ABI so we use the | |
101 | * new ABI padding size for the memcpy. | |
102 | */ | |
103 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
104 | |
105 | return ioctl(fd, LTTNG_KERNEL_OLD_METADATA, &old_channel); | |
106 | } | |
107 | ||
108 | channel.overwrite = chops->overwrite; | |
109 | channel.subbuf_size = chops->subbuf_size; | |
110 | channel.num_subbuf = chops->num_subbuf; | |
111 | channel.switch_timer_interval = chops->switch_timer_interval; | |
112 | channel.read_timer_interval = chops->read_timer_interval; | |
113 | channel.output = chops->output; | |
ea207e3b | 114 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
115 | |
116 | return ioctl(fd, LTTNG_KERNEL_METADATA, &channel); | |
f3ed775e DG |
117 | } |
118 | ||
119 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 120 | { |
4dbc372b JD |
121 | struct lttng_kernel_channel channel; |
122 | ||
c74101ef | 123 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
124 | if (lttng_kernel_use_old_abi) { |
125 | struct lttng_kernel_old_channel old_channel; | |
126 | ||
127 | old_channel.overwrite = chops->overwrite; | |
128 | old_channel.subbuf_size = chops->subbuf_size; | |
129 | old_channel.num_subbuf = chops->num_subbuf; | |
130 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
131 | old_channel.read_timer_interval = chops->read_timer_interval; | |
132 | old_channel.output = chops->output; | |
f853c53a DG |
133 | |
134 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
135 | /* | |
136 | * The new channel padding is smaller than the old ABI so we use the | |
137 | * new ABI padding size for the memcpy. | |
138 | */ | |
139 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b JD |
140 | |
141 | return ioctl(fd, LTTNG_KERNEL_OLD_CHANNEL, &old_channel); | |
142 | } | |
143 | ||
144 | channel.overwrite = chops->overwrite; | |
145 | channel.subbuf_size = chops->subbuf_size; | |
146 | channel.num_subbuf = chops->num_subbuf; | |
147 | channel.switch_timer_interval = chops->switch_timer_interval; | |
148 | channel.read_timer_interval = chops->read_timer_interval; | |
149 | channel.output = chops->output; | |
ea207e3b | 150 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b JD |
151 | |
152 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, &channel); | |
16421f6e DG |
153 | } |
154 | ||
46820c8b MD |
155 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
156 | { | |
157 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
158 | size_t array_alloc_len; | |
159 | char *new_mask; | |
160 | int ret = 0; | |
161 | ||
162 | if (!syscall_mask) { | |
163 | ret = -1; | |
164 | goto end; | |
165 | } | |
166 | ||
167 | if (!nr_bits) { | |
168 | ret = -1; | |
169 | goto end; | |
170 | } | |
171 | ||
172 | kmask_len.len = 0; | |
9bb29afd | 173 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
174 | if (ret) { |
175 | goto end; | |
176 | } | |
177 | ||
178 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 179 | |
46820c8b MD |
180 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
181 | if (!kmask) { | |
182 | ret = -1; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | kmask->len = kmask_len.len; | |
9bb29afd | 187 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
188 | if (ret) { |
189 | goto end; | |
190 | } | |
191 | ||
834978fd | 192 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
193 | if (!new_mask) { |
194 | ret = -1; | |
195 | goto end; | |
196 | } | |
197 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
198 | *syscall_mask = new_mask; | |
199 | *nr_bits = kmask->len; | |
200 | ||
201 | end: | |
202 | free(kmask); | |
203 | return ret; | |
204 | } | |
205 | ||
ccf10263 MD |
206 | int kernctl_track_pid(int fd, int pid) |
207 | { | |
9bb29afd | 208 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
209 | } |
210 | ||
211 | int kernctl_untrack_pid(int fd, int pid) | |
212 | { | |
9bb29afd | 213 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
214 | } |
215 | ||
a5dfbb9d MD |
216 | int kernctl_list_tracker_pids(int fd) |
217 | { | |
218 | return ioctl(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); | |
219 | } | |
220 | ||
93ec662e JD |
221 | int kernctl_session_metadata_regenerate(int fd) |
222 | { | |
9bb29afd | 223 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
224 | } |
225 | ||
964ccb60 | 226 | int kernctl_create_stream(int fd) |
16421f6e | 227 | { |
4dbc372b JD |
228 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
229 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
230 | } |
231 | ||
964ccb60 | 232 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 233 | { |
4dbc372b JD |
234 | if (lttng_kernel_use_old_abi) { |
235 | struct lttng_kernel_old_event old_event; | |
236 | ||
237 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
238 | old_event.instrumentation = ev->instrumentation; | |
239 | switch (ev->instrumentation) { | |
240 | case LTTNG_KERNEL_KPROBE: | |
241 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
242 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
243 | memcpy(old_event.u.kprobe.symbol_name, | |
244 | ev->u.kprobe.symbol_name, | |
245 | sizeof(old_event.u.kprobe.symbol_name)); | |
246 | break; | |
247 | case LTTNG_KERNEL_KRETPROBE: | |
248 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
249 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
250 | memcpy(old_event.u.kretprobe.symbol_name, | |
251 | ev->u.kretprobe.symbol_name, | |
252 | sizeof(old_event.u.kretprobe.symbol_name)); | |
253 | break; | |
254 | case LTTNG_KERNEL_FUNCTION: | |
255 | memcpy(old_event.u.ftrace.symbol_name, | |
256 | ev->u.ftrace.symbol_name, | |
257 | sizeof(old_event.u.ftrace.symbol_name)); | |
258 | break; | |
259 | default: | |
260 | break; | |
261 | } | |
262 | ||
263 | return ioctl(fd, LTTNG_KERNEL_OLD_EVENT, &old_event); | |
264 | } | |
964ccb60 | 265 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
266 | } |
267 | ||
964ccb60 | 268 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 269 | { |
4dbc372b JD |
270 | if (lttng_kernel_use_old_abi) { |
271 | struct lttng_kernel_old_context old_ctx; | |
272 | ||
273 | old_ctx.ctx = ctx->ctx; | |
274 | /* only type that uses the union */ | |
aa3514e9 | 275 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
276 | old_ctx.u.perf_counter.type = |
277 | ctx->u.perf_counter.type; | |
278 | old_ctx.u.perf_counter.config = | |
279 | ctx->u.perf_counter.config; | |
280 | memcpy(old_ctx.u.perf_counter.name, | |
281 | ctx->u.perf_counter.name, | |
282 | sizeof(old_ctx.u.perf_counter.name)); | |
283 | } | |
9bb29afd | 284 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 285 | } |
9bb29afd | 286 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
287 | } |
288 | ||
964ccb60 | 289 | |
9bb29afd | 290 | /* Enable event, channel and session LTTNG_IOCTL */ |
f3ed775e DG |
291 | int kernctl_enable(int fd) |
292 | { | |
4dbc372b JD |
293 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
294 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
295 | } |
296 | ||
9bb29afd | 297 | /* Disable event, channel and session LTTNG_IOCTL */ |
f3ed775e DG |
298 | int kernctl_disable(int fd) |
299 | { | |
4dbc372b JD |
300 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
301 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
302 | } |
303 | ||
964ccb60 | 304 | int kernctl_start_session(int fd) |
16421f6e | 305 | { |
4dbc372b JD |
306 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
307 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
308 | } |
309 | ||
310 | int kernctl_stop_session(int fd) | |
311 | { | |
4dbc372b JD |
312 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
313 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
314 | } |
315 | ||
00a62084 MD |
316 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
317 | { | |
318 | struct lttng_kernel_filter_bytecode *kb; | |
319 | uint32_t len; | |
320 | int ret; | |
321 | ||
322 | /* Translate bytecode to kernel bytecode */ | |
323 | kb = zmalloc(sizeof(*kb) + filter->len); | |
324 | if (!kb) | |
325 | return -ENOMEM; | |
326 | kb->len = len = filter->len; | |
327 | kb->reloc_offset = filter->reloc_table_offset; | |
328 | kb->seqnum = filter->seqnum; | |
329 | memcpy(kb->data, filter->data, len); | |
9bb29afd | 330 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
331 | free(kb); |
332 | return ret; | |
333 | } | |
334 | ||
964ccb60 MD |
335 | int kernctl_tracepoint_list(int fd) |
336 | { | |
4dbc372b JD |
337 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
338 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
339 | } |
340 | ||
d02666a9 MD |
341 | int kernctl_syscall_list(int fd) |
342 | { | |
343 | return ioctl(fd, LTTNG_KERNEL_SYSCALL_LIST); | |
344 | } | |
345 | ||
964ccb60 MD |
346 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
347 | { | |
4dbc372b JD |
348 | int ret; |
349 | ||
350 | if (lttng_kernel_use_old_abi == -1) { | |
9bb29afd | 351 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
352 | if (!ret) { |
353 | lttng_kernel_use_old_abi = 0; | |
354 | goto end; | |
355 | } | |
356 | lttng_kernel_use_old_abi = 1; | |
357 | } | |
358 | if (lttng_kernel_use_old_abi) { | |
359 | struct lttng_kernel_old_tracer_version old_v; | |
360 | ||
9bb29afd | 361 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
362 | if (ret) { |
363 | goto end; | |
364 | } | |
365 | v->major = old_v.major; | |
366 | v->minor = old_v.minor; | |
367 | v->patchlevel = old_v.patchlevel; | |
368 | } else { | |
9bb29afd | 369 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
370 | } |
371 | ||
372 | end: | |
373 | return ret; | |
964ccb60 MD |
374 | } |
375 | ||
c052142c MD |
376 | int kernctl_tracer_abi_version(int fd, |
377 | struct lttng_kernel_tracer_abi_version *v) | |
378 | { | |
9bb29afd | 379 | return LTTNG_IOCTL(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
380 | } |
381 | ||
964ccb60 MD |
382 | int kernctl_wait_quiescent(int fd) |
383 | { | |
4dbc372b JD |
384 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
385 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
386 | } |
387 | ||
388 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
389 | { | |
4dbc372b JD |
390 | int ret; |
391 | ||
392 | if (lttng_kernel_use_old_abi == -1) { | |
9bb29afd | 393 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate); |
4dbc372b JD |
394 | if (!ret) { |
395 | lttng_kernel_use_old_abi = 0; | |
396 | goto end; | |
397 | } | |
398 | lttng_kernel_use_old_abi = 1; | |
399 | } | |
400 | if (lttng_kernel_use_old_abi) { | |
401 | struct lttng_kernel_old_calibrate old_calibrate; | |
402 | ||
403 | old_calibrate.type = calibrate->type; | |
9bb29afd JG |
404 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_OLD_CALIBRATE, |
405 | &old_calibrate); | |
4dbc372b JD |
406 | if (ret) { |
407 | goto end; | |
408 | } | |
409 | calibrate->type = old_calibrate.type; | |
410 | } else { | |
9bb29afd | 411 | ret = LTTNG_IOCTL(fd, LTTNG_KERNEL_CALIBRATE, calibrate); |
4dbc372b JD |
412 | } |
413 | ||
414 | end: | |
415 | return ret; | |
964ccb60 MD |
416 | } |
417 | ||
418 | ||
419 | int kernctl_buffer_flush(int fd) | |
420 | { | |
9bb29afd | 421 | return LTTNG_IOCTL(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
422 | } |
423 | ||
93ec662e JD |
424 | /* returns the version of the metadata. */ |
425 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
426 | { | |
9bb29afd | 427 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
428 | } |
429 | ||
964ccb60 MD |
430 | |
431 | /* Buffer operations */ | |
432 | ||
433 | /* For mmap mode, readable without "get" operation */ | |
434 | ||
16421f6e DG |
435 | /* returns the length to mmap. */ |
436 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
437 | { | |
9bb29afd | 438 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
439 | } |
440 | ||
964ccb60 MD |
441 | /* returns the maximum size for sub-buffers. */ |
442 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
443 | { | |
9bb29afd | 444 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
445 | } |
446 | ||
447 | /* | |
448 | * For mmap mode, operate on the current packet (between get/put or | |
449 | * get_next/put_next). | |
450 | */ | |
451 | ||
16421f6e DG |
452 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
453 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
454 | { | |
9bb29afd | 455 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
456 | } |
457 | ||
964ccb60 MD |
458 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
459 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 460 | { |
9bb29afd | 461 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
462 | } |
463 | ||
464 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
465 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
466 | { | |
9bb29afd | 467 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
468 | } |
469 | ||
964ccb60 MD |
470 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
471 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 472 | { |
9bb29afd | 473 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
474 | } |
475 | ||
d4a1283e | 476 | |
16421f6e DG |
477 | /* Release exclusive sub-buffer access, move consumer forward. */ |
478 | int kernctl_put_next_subbuf(int fd) | |
479 | { | |
9bb29afd | 480 | return LTTNG_IOCTL(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
481 | } |
482 | ||
964ccb60 | 483 | /* snapshot */ |
16421f6e DG |
484 | |
485 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
486 | int kernctl_snapshot(int fd) | |
487 | { | |
9bb29afd | 488 | return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
489 | } |
490 | ||
491 | /* Get the consumer position (iteration start) */ | |
492 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
493 | { | |
9bb29afd | 494 | return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
495 | } |
496 | ||
497 | /* Get the producer position (iteration end) */ | |
498 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
499 | { | |
9bb29afd | 500 | return LTTNG_IOCTL(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
501 | } |
502 | ||
964ccb60 MD |
503 | /* Get exclusive read access to the specified sub-buffer position */ |
504 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 505 | { |
9bb29afd | 506 | return LTTNG_IOCTL(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 507 | } |
d0254c7c | 508 | |
964ccb60 MD |
509 | /* Release exclusive sub-buffer access */ |
510 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 511 | { |
9bb29afd | 512 | return LTTNG_IOCTL(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 513 | } |
309167d2 JD |
514 | |
515 | /* Returns the timestamp begin of the current sub-buffer. */ | |
516 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
517 | { | |
9bb29afd JG |
518 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
519 | timestamp_begin); | |
309167d2 JD |
520 | } |
521 | ||
522 | /* Returns the timestamp end of the current sub-buffer. */ | |
523 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
524 | { | |
9bb29afd JG |
525 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
526 | timestamp_end); | |
309167d2 JD |
527 | } |
528 | ||
529 | /* Returns the number of discarded events in the current sub-buffer. */ | |
530 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
531 | { | |
9bb29afd JG |
532 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
533 | events_discarded); | |
309167d2 JD |
534 | } |
535 | ||
536 | /* Returns the content size in the current sub-buffer. */ | |
537 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
538 | { | |
9bb29afd JG |
539 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
540 | content_size); | |
309167d2 JD |
541 | } |
542 | ||
543 | /* Returns the packet size in the current sub-buffer. */ | |
544 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
545 | { | |
9bb29afd | 546 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, packet_size); |
309167d2 JD |
547 | } |
548 | ||
549 | /* Returns the stream id of the current sub-buffer. */ | |
550 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
551 | { | |
9bb29afd | 552 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, stream_id); |
309167d2 | 553 | } |
d3e2ba59 JD |
554 | |
555 | /* Returns the current timestamp. */ | |
556 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
557 | { | |
9bb29afd | 558 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, ts); |
d3e2ba59 | 559 | } |
fb83fe64 JD |
560 | |
561 | /* Returns the packet sequence number of the current sub-buffer. */ | |
562 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
563 | { | |
9bb29afd | 564 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 565 | } |
000fa86f JD |
566 | |
567 | /* Returns the stream instance id. */ | |
568 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
569 | { | |
9bb29afd | 570 | return LTTNG_IOCTL(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 571 | } |