Commit | Line | Data |
---|---|---|
ee0326c0 | 1 | /* |
16421f6e DG |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
a6bd6d9b | 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> |
a6bd6d9b 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 | |
5226f1bc | 32 | #define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \ |
a6bd6d9b JG |
33 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ |
34 | assert(ret <= 0); \ | |
5226f1bc JG |
35 | !ret ? 0 : -errno; \ |
36 | }) | |
37 | ||
38 | #define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \ | |
39 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ | |
40 | ret >= 0 ? ret : -errno; \ | |
a6bd6d9b JG |
41 | }) |
42 | ||
4dbc372b JD |
43 | /* |
44 | * This flag indicates which version of the kernel ABI to use. The old | |
45 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
46 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
47 | * deprecated and will be removed eventually. | |
48 | */ | |
49 | static int lttng_kernel_use_old_abi = -1; | |
50 | ||
51 | /* | |
52 | * Execute the new or old ioctl depending on the ABI version. | |
53 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
54 | * this function tests if the new ABI is available and otherwise fallbacks | |
55 | * on the old one. | |
56 | * This function takes the fd on which the ioctl must be executed and the old | |
57 | * and new request codes. | |
58 | * It returns the return value of the ioctl executed. | |
59 | */ | |
60 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
61 | unsigned long newname) | |
62 | { | |
63 | int ret; | |
64 | ||
65 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 66 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
67 | if (!ret) { |
68 | lttng_kernel_use_old_abi = 0; | |
69 | goto end; | |
70 | } | |
71 | lttng_kernel_use_old_abi = 1; | |
72 | } | |
73 | if (lttng_kernel_use_old_abi) { | |
5226f1bc | 74 | ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); |
4dbc372b | 75 | } else { |
5226f1bc | 76 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
77 | } |
78 | ||
79 | end: | |
80 | return ret; | |
81 | } | |
82 | ||
964ccb60 | 83 | int kernctl_create_session(int fd) |
d65106b1 | 84 | { |
4dbc372b JD |
85 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
86 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
87 | } |
88 | ||
964ccb60 MD |
89 | /* open the metadata global channel */ |
90 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 91 | { |
4dbc372b JD |
92 | struct lttng_kernel_old_channel old_channel; |
93 | struct lttng_kernel_channel channel; | |
94 | ||
95 | if (lttng_kernel_use_old_abi) { | |
96 | old_channel.overwrite = chops->overwrite; | |
97 | old_channel.subbuf_size = chops->subbuf_size; | |
98 | old_channel.num_subbuf = chops->num_subbuf; | |
99 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
100 | old_channel.read_timer_interval = chops->read_timer_interval; | |
101 | old_channel.output = chops->output; | |
f853c53a DG |
102 | |
103 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
104 | /* | |
105 | * The new channel padding is smaller than the old ABI so we use the | |
106 | * new ABI padding size for the memcpy. | |
107 | */ | |
108 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 109 | |
5226f1bc JG |
110 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA, |
111 | &old_channel); | |
4dbc372b JD |
112 | } |
113 | ||
114 | channel.overwrite = chops->overwrite; | |
115 | channel.subbuf_size = chops->subbuf_size; | |
116 | channel.num_subbuf = chops->num_subbuf; | |
117 | channel.switch_timer_interval = chops->switch_timer_interval; | |
118 | channel.read_timer_interval = chops->read_timer_interval; | |
119 | channel.output = chops->output; | |
ea207e3b | 120 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 121 | |
5226f1bc | 122 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel); |
f3ed775e DG |
123 | } |
124 | ||
125 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 126 | { |
4dbc372b JD |
127 | struct lttng_kernel_channel channel; |
128 | ||
c74101ef | 129 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
130 | if (lttng_kernel_use_old_abi) { |
131 | struct lttng_kernel_old_channel old_channel; | |
132 | ||
133 | old_channel.overwrite = chops->overwrite; | |
134 | old_channel.subbuf_size = chops->subbuf_size; | |
135 | old_channel.num_subbuf = chops->num_subbuf; | |
136 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
137 | old_channel.read_timer_interval = chops->read_timer_interval; | |
138 | old_channel.output = chops->output; | |
f853c53a DG |
139 | |
140 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
141 | /* | |
142 | * The new channel padding is smaller than the old ABI so we use the | |
143 | * new ABI padding size for the memcpy. | |
144 | */ | |
145 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 146 | |
5226f1bc JG |
147 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL, |
148 | &old_channel); | |
4dbc372b JD |
149 | } |
150 | ||
151 | channel.overwrite = chops->overwrite; | |
152 | channel.subbuf_size = chops->subbuf_size; | |
153 | channel.num_subbuf = chops->num_subbuf; | |
154 | channel.switch_timer_interval = chops->switch_timer_interval; | |
155 | channel.read_timer_interval = chops->read_timer_interval; | |
156 | channel.output = chops->output; | |
ea207e3b | 157 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 158 | |
5226f1bc | 159 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel); |
16421f6e DG |
160 | } |
161 | ||
46820c8b MD |
162 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
163 | { | |
164 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
165 | size_t array_alloc_len; | |
166 | char *new_mask; | |
167 | int ret = 0; | |
168 | ||
169 | if (!syscall_mask) { | |
170 | ret = -1; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | if (!nr_bits) { | |
175 | ret = -1; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | kmask_len.len = 0; | |
5226f1bc | 180 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
181 | if (ret) { |
182 | goto end; | |
183 | } | |
184 | ||
185 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 186 | |
46820c8b MD |
187 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
188 | if (!kmask) { | |
189 | ret = -1; | |
190 | goto end; | |
191 | } | |
192 | ||
193 | kmask->len = kmask_len.len; | |
5226f1bc | 194 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
195 | if (ret) { |
196 | goto end; | |
197 | } | |
198 | ||
834978fd | 199 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
200 | if (!new_mask) { |
201 | ret = -1; | |
202 | goto end; | |
203 | } | |
204 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
205 | *syscall_mask = new_mask; | |
206 | *nr_bits = kmask->len; | |
207 | ||
208 | end: | |
209 | free(kmask); | |
210 | return ret; | |
211 | } | |
212 | ||
ccf10263 MD |
213 | int kernctl_track_pid(int fd, int pid) |
214 | { | |
5226f1bc | 215 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
216 | } |
217 | ||
218 | int kernctl_untrack_pid(int fd, int pid) | |
219 | { | |
5226f1bc | 220 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
221 | } |
222 | ||
a5dfbb9d MD |
223 | int kernctl_list_tracker_pids(int fd) |
224 | { | |
5226f1bc | 225 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); |
a5dfbb9d MD |
226 | } |
227 | ||
eded6438 | 228 | int kernctl_session_regenerate_metadata(int fd) |
93ec662e | 229 | { |
5226f1bc | 230 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
231 | } |
232 | ||
c2561365 JD |
233 | int kernctl_session_regenerate_statedump(int fd) |
234 | { | |
235 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); | |
236 | } | |
237 | ||
964ccb60 | 238 | int kernctl_create_stream(int fd) |
16421f6e | 239 | { |
4dbc372b JD |
240 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
241 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
242 | } |
243 | ||
964ccb60 | 244 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 245 | { |
4dbc372b JD |
246 | if (lttng_kernel_use_old_abi) { |
247 | struct lttng_kernel_old_event old_event; | |
248 | ||
249 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); | |
250 | old_event.instrumentation = ev->instrumentation; | |
251 | switch (ev->instrumentation) { | |
252 | case LTTNG_KERNEL_KPROBE: | |
253 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
254 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
255 | memcpy(old_event.u.kprobe.symbol_name, | |
256 | ev->u.kprobe.symbol_name, | |
257 | sizeof(old_event.u.kprobe.symbol_name)); | |
258 | break; | |
259 | case LTTNG_KERNEL_KRETPROBE: | |
260 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
261 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
262 | memcpy(old_event.u.kretprobe.symbol_name, | |
263 | ev->u.kretprobe.symbol_name, | |
264 | sizeof(old_event.u.kretprobe.symbol_name)); | |
265 | break; | |
266 | case LTTNG_KERNEL_FUNCTION: | |
267 | memcpy(old_event.u.ftrace.symbol_name, | |
268 | ev->u.ftrace.symbol_name, | |
269 | sizeof(old_event.u.ftrace.symbol_name)); | |
270 | break; | |
271 | default: | |
272 | break; | |
273 | } | |
274 | ||
5226f1bc JG |
275 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT, |
276 | &old_event); | |
4dbc372b | 277 | } |
5226f1bc | 278 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
279 | } |
280 | ||
964ccb60 | 281 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 282 | { |
4dbc372b JD |
283 | if (lttng_kernel_use_old_abi) { |
284 | struct lttng_kernel_old_context old_ctx; | |
285 | ||
286 | old_ctx.ctx = ctx->ctx; | |
287 | /* only type that uses the union */ | |
aa3514e9 | 288 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
289 | old_ctx.u.perf_counter.type = |
290 | ctx->u.perf_counter.type; | |
291 | old_ctx.u.perf_counter.config = | |
292 | ctx->u.perf_counter.config; | |
293 | memcpy(old_ctx.u.perf_counter.name, | |
294 | ctx->u.perf_counter.name, | |
295 | sizeof(old_ctx.u.perf_counter.name)); | |
296 | } | |
5226f1bc | 297 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 298 | } |
5226f1bc | 299 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
300 | } |
301 | ||
964ccb60 | 302 | |
5226f1bc | 303 | /* Enable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
304 | int kernctl_enable(int fd) |
305 | { | |
4dbc372b JD |
306 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
307 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
308 | } |
309 | ||
5226f1bc | 310 | /* Disable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
311 | int kernctl_disable(int fd) |
312 | { | |
4dbc372b JD |
313 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
314 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
315 | } |
316 | ||
964ccb60 | 317 | int kernctl_start_session(int fd) |
16421f6e | 318 | { |
4dbc372b JD |
319 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
320 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
321 | } |
322 | ||
323 | int kernctl_stop_session(int fd) | |
324 | { | |
4dbc372b JD |
325 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
326 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
327 | } |
328 | ||
00a62084 MD |
329 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
330 | { | |
331 | struct lttng_kernel_filter_bytecode *kb; | |
332 | uint32_t len; | |
333 | int ret; | |
334 | ||
335 | /* Translate bytecode to kernel bytecode */ | |
336 | kb = zmalloc(sizeof(*kb) + filter->len); | |
337 | if (!kb) | |
338 | return -ENOMEM; | |
339 | kb->len = len = filter->len; | |
340 | kb->reloc_offset = filter->reloc_table_offset; | |
341 | kb->seqnum = filter->seqnum; | |
342 | memcpy(kb->data, filter->data, len); | |
5226f1bc | 343 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
344 | free(kb); |
345 | return ret; | |
346 | } | |
347 | ||
964ccb60 MD |
348 | int kernctl_tracepoint_list(int fd) |
349 | { | |
4dbc372b JD |
350 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
351 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
352 | } |
353 | ||
d02666a9 MD |
354 | int kernctl_syscall_list(int fd) |
355 | { | |
5226f1bc | 356 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST); |
d02666a9 MD |
357 | } |
358 | ||
964ccb60 MD |
359 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
360 | { | |
4dbc372b JD |
361 | int ret; |
362 | ||
363 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 364 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
365 | if (!ret) { |
366 | lttng_kernel_use_old_abi = 0; | |
367 | goto end; | |
368 | } | |
369 | lttng_kernel_use_old_abi = 1; | |
370 | } | |
371 | if (lttng_kernel_use_old_abi) { | |
372 | struct lttng_kernel_old_tracer_version old_v; | |
373 | ||
5226f1bc | 374 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
375 | if (ret) { |
376 | goto end; | |
377 | } | |
378 | v->major = old_v.major; | |
379 | v->minor = old_v.minor; | |
380 | v->patchlevel = old_v.patchlevel; | |
381 | } else { | |
5226f1bc | 382 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
383 | } |
384 | ||
385 | end: | |
386 | return ret; | |
964ccb60 MD |
387 | } |
388 | ||
c052142c MD |
389 | int kernctl_tracer_abi_version(int fd, |
390 | struct lttng_kernel_tracer_abi_version *v) | |
391 | { | |
5226f1bc | 392 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
393 | } |
394 | ||
964ccb60 MD |
395 | int kernctl_wait_quiescent(int fd) |
396 | { | |
4dbc372b JD |
397 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
398 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
399 | } |
400 | ||
964ccb60 MD |
401 | int kernctl_buffer_flush(int fd) |
402 | { | |
5226f1bc | 403 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
404 | } |
405 | ||
93ec662e JD |
406 | /* returns the version of the metadata. */ |
407 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
408 | { | |
5226f1bc | 409 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
410 | } |
411 | ||
964ccb60 MD |
412 | |
413 | /* Buffer operations */ | |
414 | ||
415 | /* For mmap mode, readable without "get" operation */ | |
416 | ||
16421f6e DG |
417 | /* returns the length to mmap. */ |
418 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
419 | { | |
5226f1bc | 420 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
421 | } |
422 | ||
964ccb60 MD |
423 | /* returns the maximum size for sub-buffers. */ |
424 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
425 | { | |
5226f1bc | 426 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
427 | } |
428 | ||
429 | /* | |
430 | * For mmap mode, operate on the current packet (between get/put or | |
431 | * get_next/put_next). | |
432 | */ | |
433 | ||
16421f6e DG |
434 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
435 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
436 | { | |
5226f1bc | 437 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
438 | } |
439 | ||
964ccb60 MD |
440 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
441 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 442 | { |
5226f1bc | 443 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
444 | } |
445 | ||
446 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
447 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
448 | { | |
5226f1bc | 449 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
450 | } |
451 | ||
964ccb60 MD |
452 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
453 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 454 | { |
5226f1bc | 455 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
456 | } |
457 | ||
d4a1283e | 458 | |
16421f6e DG |
459 | /* Release exclusive sub-buffer access, move consumer forward. */ |
460 | int kernctl_put_next_subbuf(int fd) | |
461 | { | |
5226f1bc | 462 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
463 | } |
464 | ||
964ccb60 | 465 | /* snapshot */ |
16421f6e DG |
466 | |
467 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
468 | int kernctl_snapshot(int fd) | |
469 | { | |
5226f1bc | 470 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
471 | } |
472 | ||
473 | /* Get the consumer position (iteration start) */ | |
474 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
475 | { | |
5226f1bc | 476 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
477 | } |
478 | ||
479 | /* Get the producer position (iteration end) */ | |
480 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
481 | { | |
5226f1bc | 482 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
483 | } |
484 | ||
964ccb60 MD |
485 | /* Get exclusive read access to the specified sub-buffer position */ |
486 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 487 | { |
5226f1bc | 488 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 489 | } |
d0254c7c | 490 | |
964ccb60 MD |
491 | /* Release exclusive sub-buffer access */ |
492 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 493 | { |
5226f1bc | 494 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 495 | } |
309167d2 JD |
496 | |
497 | /* Returns the timestamp begin of the current sub-buffer. */ | |
498 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
499 | { | |
5226f1bc | 500 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
a6bd6d9b | 501 | timestamp_begin); |
309167d2 JD |
502 | } |
503 | ||
504 | /* Returns the timestamp end of the current sub-buffer. */ | |
505 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
506 | { | |
5226f1bc | 507 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
a6bd6d9b | 508 | timestamp_end); |
309167d2 JD |
509 | } |
510 | ||
511 | /* Returns the number of discarded events in the current sub-buffer. */ | |
512 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
513 | { | |
5226f1bc | 514 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
a6bd6d9b | 515 | events_discarded); |
309167d2 JD |
516 | } |
517 | ||
518 | /* Returns the content size in the current sub-buffer. */ | |
519 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
520 | { | |
5226f1bc | 521 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
a6bd6d9b | 522 | content_size); |
309167d2 JD |
523 | } |
524 | ||
525 | /* Returns the packet size in the current sub-buffer. */ | |
526 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
527 | { | |
5226f1bc JG |
528 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, |
529 | packet_size); | |
309167d2 JD |
530 | } |
531 | ||
532 | /* Returns the stream id of the current sub-buffer. */ | |
533 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
534 | { | |
5226f1bc JG |
535 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, |
536 | stream_id); | |
309167d2 | 537 | } |
d3e2ba59 JD |
538 | |
539 | /* Returns the current timestamp. */ | |
540 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
541 | { | |
5226f1bc JG |
542 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, |
543 | ts); | |
d3e2ba59 | 544 | } |
fb83fe64 JD |
545 | |
546 | /* Returns the packet sequence number of the current sub-buffer. */ | |
547 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
548 | { | |
5226f1bc | 549 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 550 | } |
000fa86f JD |
551 | |
552 | /* Returns the stream instance id. */ | |
553 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
554 | { | |
5226f1bc | 555 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 556 | } |