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> |
8ff4109e | 25 | #include <common/macros.h> |
00a62084 | 26 | #include <errno.h> |
a6bd6d9b JG |
27 | #include <stdarg.h> |
28 | #include <assert.h> | |
16421f6e | 29 | |
10a8a223 | 30 | #include "kernel-ctl.h" |
16421f6e | 31 | #include "kernel-ioctl.h" |
16421f6e | 32 | |
5226f1bc | 33 | #define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \ |
a6bd6d9b JG |
34 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ |
35 | assert(ret <= 0); \ | |
5226f1bc JG |
36 | !ret ? 0 : -errno; \ |
37 | }) | |
38 | ||
39 | #define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \ | |
40 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ | |
41 | ret >= 0 ? ret : -errno; \ | |
a6bd6d9b JG |
42 | }) |
43 | ||
4dbc372b JD |
44 | /* |
45 | * This flag indicates which version of the kernel ABI to use. The old | |
46 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
47 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
48 | * deprecated and will be removed eventually. | |
49 | */ | |
50 | static int lttng_kernel_use_old_abi = -1; | |
51 | ||
52 | /* | |
53 | * Execute the new or old ioctl depending on the ABI version. | |
54 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
55 | * this function tests if the new ABI is available and otherwise fallbacks | |
56 | * on the old one. | |
57 | * This function takes the fd on which the ioctl must be executed and the old | |
58 | * and new request codes. | |
59 | * It returns the return value of the ioctl executed. | |
60 | */ | |
61 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
62 | unsigned long newname) | |
63 | { | |
64 | int ret; | |
65 | ||
66 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 67 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
68 | if (!ret) { |
69 | lttng_kernel_use_old_abi = 0; | |
70 | goto end; | |
71 | } | |
72 | lttng_kernel_use_old_abi = 1; | |
73 | } | |
74 | if (lttng_kernel_use_old_abi) { | |
5226f1bc | 75 | ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); |
4dbc372b | 76 | } else { |
5226f1bc | 77 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
78 | } |
79 | ||
80 | end: | |
81 | return ret; | |
82 | } | |
83 | ||
964ccb60 | 84 | int kernctl_create_session(int fd) |
d65106b1 | 85 | { |
4dbc372b JD |
86 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
87 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
88 | } |
89 | ||
964ccb60 MD |
90 | /* open the metadata global channel */ |
91 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 92 | { |
4dbc372b JD |
93 | struct lttng_kernel_channel channel; |
94 | ||
95 | if (lttng_kernel_use_old_abi) { | |
10600be0 MD |
96 | struct lttng_kernel_old_channel old_channel; |
97 | ||
98 | memset(&old_channel, 0, sizeof(old_channel)); | |
4dbc372b JD |
99 | old_channel.overwrite = chops->overwrite; |
100 | old_channel.subbuf_size = chops->subbuf_size; | |
101 | old_channel.num_subbuf = chops->num_subbuf; | |
102 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
103 | old_channel.read_timer_interval = chops->read_timer_interval; | |
104 | old_channel.output = chops->output; | |
f853c53a DG |
105 | |
106 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
107 | /* | |
108 | * The new channel padding is smaller than the old ABI so we use the | |
109 | * new ABI padding size for the memcpy. | |
110 | */ | |
111 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 112 | |
5226f1bc JG |
113 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA, |
114 | &old_channel); | |
4dbc372b JD |
115 | } |
116 | ||
10600be0 | 117 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
118 | channel.overwrite = chops->overwrite; |
119 | channel.subbuf_size = chops->subbuf_size; | |
120 | channel.num_subbuf = chops->num_subbuf; | |
121 | channel.switch_timer_interval = chops->switch_timer_interval; | |
122 | channel.read_timer_interval = chops->read_timer_interval; | |
123 | channel.output = chops->output; | |
ea207e3b | 124 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 125 | |
5226f1bc | 126 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel); |
f3ed775e DG |
127 | } |
128 | ||
129 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 130 | { |
4dbc372b JD |
131 | struct lttng_kernel_channel channel; |
132 | ||
c74101ef | 133 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
134 | if (lttng_kernel_use_old_abi) { |
135 | struct lttng_kernel_old_channel old_channel; | |
136 | ||
137 | old_channel.overwrite = chops->overwrite; | |
138 | old_channel.subbuf_size = chops->subbuf_size; | |
139 | old_channel.num_subbuf = chops->num_subbuf; | |
140 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
141 | old_channel.read_timer_interval = chops->read_timer_interval; | |
142 | old_channel.output = chops->output; | |
f853c53a DG |
143 | |
144 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
145 | /* | |
146 | * The new channel padding is smaller than the old ABI so we use the | |
147 | * new ABI padding size for the memcpy. | |
148 | */ | |
149 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 150 | |
5226f1bc JG |
151 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL, |
152 | &old_channel); | |
4dbc372b JD |
153 | } |
154 | ||
155 | channel.overwrite = chops->overwrite; | |
156 | channel.subbuf_size = chops->subbuf_size; | |
157 | channel.num_subbuf = chops->num_subbuf; | |
158 | channel.switch_timer_interval = chops->switch_timer_interval; | |
159 | channel.read_timer_interval = chops->read_timer_interval; | |
160 | channel.output = chops->output; | |
ea207e3b | 161 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 162 | |
5226f1bc | 163 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel); |
16421f6e DG |
164 | } |
165 | ||
46820c8b MD |
166 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
167 | { | |
168 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
169 | size_t array_alloc_len; | |
170 | char *new_mask; | |
171 | int ret = 0; | |
172 | ||
173 | if (!syscall_mask) { | |
174 | ret = -1; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | if (!nr_bits) { | |
179 | ret = -1; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | kmask_len.len = 0; | |
5226f1bc | 184 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
185 | if (ret) { |
186 | goto end; | |
187 | } | |
188 | ||
189 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 190 | |
46820c8b MD |
191 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
192 | if (!kmask) { | |
193 | ret = -1; | |
194 | goto end; | |
195 | } | |
196 | ||
197 | kmask->len = kmask_len.len; | |
5226f1bc | 198 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
199 | if (ret) { |
200 | goto end; | |
201 | } | |
202 | ||
834978fd | 203 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
204 | if (!new_mask) { |
205 | ret = -1; | |
206 | goto end; | |
207 | } | |
208 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
209 | *syscall_mask = new_mask; | |
210 | *nr_bits = kmask->len; | |
211 | ||
212 | end: | |
213 | free(kmask); | |
214 | return ret; | |
215 | } | |
216 | ||
ccf10263 MD |
217 | int kernctl_track_pid(int fd, int pid) |
218 | { | |
5226f1bc | 219 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
220 | } |
221 | ||
222 | int kernctl_untrack_pid(int fd, int pid) | |
223 | { | |
5226f1bc | 224 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
225 | } |
226 | ||
a5dfbb9d MD |
227 | int kernctl_list_tracker_pids(int fd) |
228 | { | |
5226f1bc | 229 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); |
a5dfbb9d MD |
230 | } |
231 | ||
eded6438 | 232 | int kernctl_session_regenerate_metadata(int fd) |
93ec662e | 233 | { |
5226f1bc | 234 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
235 | } |
236 | ||
c2561365 JD |
237 | int kernctl_session_regenerate_statedump(int fd) |
238 | { | |
239 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); | |
240 | } | |
241 | ||
8ff4109e JR |
242 | int kernctl_session_set_name(int fd, const char *name) |
243 | { | |
244 | int ret; | |
245 | struct lttng_kernel_session_name session_name; | |
246 | ||
247 | ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); | |
248 | if (ret) { | |
249 | goto end; | |
250 | } | |
251 | ||
252 | ret = LTTNG_IOCTL_CHECK( | |
253 | fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name); | |
254 | end: | |
255 | return ret; | |
256 | } | |
257 | ||
964ccb60 | 258 | int kernctl_create_stream(int fd) |
16421f6e | 259 | { |
4dbc372b JD |
260 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
261 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
262 | } |
263 | ||
964ccb60 | 264 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 265 | { |
4dbc372b JD |
266 | if (lttng_kernel_use_old_abi) { |
267 | struct lttng_kernel_old_event old_event; | |
268 | ||
10600be0 | 269 | memset(&old_event, 0, sizeof(old_event)); |
4dbc372b JD |
270 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); |
271 | old_event.instrumentation = ev->instrumentation; | |
272 | switch (ev->instrumentation) { | |
273 | case LTTNG_KERNEL_KPROBE: | |
274 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
275 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
276 | memcpy(old_event.u.kprobe.symbol_name, | |
277 | ev->u.kprobe.symbol_name, | |
278 | sizeof(old_event.u.kprobe.symbol_name)); | |
279 | break; | |
280 | case LTTNG_KERNEL_KRETPROBE: | |
281 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
282 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
283 | memcpy(old_event.u.kretprobe.symbol_name, | |
284 | ev->u.kretprobe.symbol_name, | |
285 | sizeof(old_event.u.kretprobe.symbol_name)); | |
286 | break; | |
287 | case LTTNG_KERNEL_FUNCTION: | |
288 | memcpy(old_event.u.ftrace.symbol_name, | |
289 | ev->u.ftrace.symbol_name, | |
290 | sizeof(old_event.u.ftrace.symbol_name)); | |
291 | break; | |
292 | default: | |
293 | break; | |
294 | } | |
295 | ||
5226f1bc JG |
296 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT, |
297 | &old_event); | |
4dbc372b | 298 | } |
5226f1bc | 299 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
300 | } |
301 | ||
964ccb60 | 302 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 303 | { |
4dbc372b JD |
304 | if (lttng_kernel_use_old_abi) { |
305 | struct lttng_kernel_old_context old_ctx; | |
306 | ||
10600be0 | 307 | memset(&old_ctx, 0, sizeof(old_ctx)); |
4dbc372b JD |
308 | old_ctx.ctx = ctx->ctx; |
309 | /* only type that uses the union */ | |
aa3514e9 | 310 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
311 | old_ctx.u.perf_counter.type = |
312 | ctx->u.perf_counter.type; | |
313 | old_ctx.u.perf_counter.config = | |
314 | ctx->u.perf_counter.config; | |
315 | memcpy(old_ctx.u.perf_counter.name, | |
316 | ctx->u.perf_counter.name, | |
317 | sizeof(old_ctx.u.perf_counter.name)); | |
318 | } | |
5226f1bc | 319 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 320 | } |
5226f1bc | 321 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
322 | } |
323 | ||
964ccb60 | 324 | |
5226f1bc | 325 | /* Enable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
326 | int kernctl_enable(int fd) |
327 | { | |
4dbc372b JD |
328 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
329 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
330 | } |
331 | ||
5226f1bc | 332 | /* Disable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
333 | int kernctl_disable(int fd) |
334 | { | |
4dbc372b JD |
335 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
336 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
337 | } |
338 | ||
964ccb60 | 339 | int kernctl_start_session(int fd) |
16421f6e | 340 | { |
4dbc372b JD |
341 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
342 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
343 | } |
344 | ||
345 | int kernctl_stop_session(int fd) | |
346 | { | |
4dbc372b JD |
347 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
348 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
349 | } |
350 | ||
00a62084 MD |
351 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
352 | { | |
353 | struct lttng_kernel_filter_bytecode *kb; | |
354 | uint32_t len; | |
355 | int ret; | |
356 | ||
357 | /* Translate bytecode to kernel bytecode */ | |
358 | kb = zmalloc(sizeof(*kb) + filter->len); | |
359 | if (!kb) | |
360 | return -ENOMEM; | |
361 | kb->len = len = filter->len; | |
362 | kb->reloc_offset = filter->reloc_table_offset; | |
363 | kb->seqnum = filter->seqnum; | |
364 | memcpy(kb->data, filter->data, len); | |
5226f1bc | 365 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
366 | free(kb); |
367 | return ret; | |
368 | } | |
369 | ||
1ab8c2ad FD |
370 | int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite) |
371 | { | |
372 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite); | |
373 | } | |
374 | ||
964ccb60 MD |
375 | int kernctl_tracepoint_list(int fd) |
376 | { | |
4dbc372b JD |
377 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
378 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
379 | } |
380 | ||
d02666a9 MD |
381 | int kernctl_syscall_list(int fd) |
382 | { | |
5226f1bc | 383 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST); |
d02666a9 MD |
384 | } |
385 | ||
964ccb60 MD |
386 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
387 | { | |
4dbc372b JD |
388 | int ret; |
389 | ||
390 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 391 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
392 | if (!ret) { |
393 | lttng_kernel_use_old_abi = 0; | |
394 | goto end; | |
395 | } | |
396 | lttng_kernel_use_old_abi = 1; | |
397 | } | |
398 | if (lttng_kernel_use_old_abi) { | |
399 | struct lttng_kernel_old_tracer_version old_v; | |
400 | ||
5226f1bc | 401 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
402 | if (ret) { |
403 | goto end; | |
404 | } | |
405 | v->major = old_v.major; | |
406 | v->minor = old_v.minor; | |
407 | v->patchlevel = old_v.patchlevel; | |
408 | } else { | |
5226f1bc | 409 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
410 | } |
411 | ||
412 | end: | |
413 | return ret; | |
964ccb60 MD |
414 | } |
415 | ||
c052142c MD |
416 | int kernctl_tracer_abi_version(int fd, |
417 | struct lttng_kernel_tracer_abi_version *v) | |
418 | { | |
5226f1bc | 419 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
420 | } |
421 | ||
964ccb60 MD |
422 | int kernctl_wait_quiescent(int fd) |
423 | { | |
4dbc372b JD |
424 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
425 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
426 | } |
427 | ||
964ccb60 MD |
428 | int kernctl_buffer_flush(int fd) |
429 | { | |
5226f1bc | 430 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
431 | } |
432 | ||
f22dd891 MD |
433 | int kernctl_buffer_flush_empty(int fd) |
434 | { | |
435 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY); | |
436 | } | |
437 | ||
93ec662e JD |
438 | /* returns the version of the metadata. */ |
439 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
440 | { | |
5226f1bc | 441 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
442 | } |
443 | ||
8024cc8c JD |
444 | int kernctl_metadata_cache_dump(int fd) |
445 | { | |
446 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP); | |
447 | } | |
964ccb60 MD |
448 | |
449 | /* Buffer operations */ | |
450 | ||
451 | /* For mmap mode, readable without "get" operation */ | |
452 | ||
16421f6e DG |
453 | /* returns the length to mmap. */ |
454 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
455 | { | |
5226f1bc | 456 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
457 | } |
458 | ||
964ccb60 MD |
459 | /* returns the maximum size for sub-buffers. */ |
460 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
461 | { | |
5226f1bc | 462 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
463 | } |
464 | ||
465 | /* | |
466 | * For mmap mode, operate on the current packet (between get/put or | |
467 | * get_next/put_next). | |
468 | */ | |
469 | ||
16421f6e DG |
470 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
471 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
472 | { | |
5226f1bc | 473 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
474 | } |
475 | ||
964ccb60 MD |
476 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
477 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 478 | { |
5226f1bc | 479 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
480 | } |
481 | ||
482 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
483 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
484 | { | |
5226f1bc | 485 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
486 | } |
487 | ||
964ccb60 MD |
488 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
489 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 490 | { |
5226f1bc | 491 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
492 | } |
493 | ||
d4a1283e | 494 | |
16421f6e DG |
495 | /* Release exclusive sub-buffer access, move consumer forward. */ |
496 | int kernctl_put_next_subbuf(int fd) | |
497 | { | |
5226f1bc | 498 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
499 | } |
500 | ||
964ccb60 | 501 | /* snapshot */ |
16421f6e DG |
502 | |
503 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
504 | int kernctl_snapshot(int fd) | |
505 | { | |
5226f1bc | 506 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
507 | } |
508 | ||
b007ec59 JG |
509 | /* |
510 | * Get a snapshot of the current ring buffer producer and consumer positions, | |
511 | * regardless of whether or not the two positions are contained within the | |
512 | * same sub-buffer. | |
513 | */ | |
514 | int kernctl_snapshot_sample_positions(int fd) | |
515 | { | |
516 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); | |
517 | } | |
518 | ||
16421f6e DG |
519 | /* Get the consumer position (iteration start) */ |
520 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
521 | { | |
5226f1bc | 522 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
523 | } |
524 | ||
525 | /* Get the producer position (iteration end) */ | |
526 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
527 | { | |
5226f1bc | 528 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
529 | } |
530 | ||
964ccb60 MD |
531 | /* Get exclusive read access to the specified sub-buffer position */ |
532 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 533 | { |
5226f1bc | 534 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 535 | } |
d0254c7c | 536 | |
964ccb60 MD |
537 | /* Release exclusive sub-buffer access */ |
538 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 539 | { |
5226f1bc | 540 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 541 | } |
309167d2 JD |
542 | |
543 | /* Returns the timestamp begin of the current sub-buffer. */ | |
544 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
545 | { | |
5226f1bc | 546 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
a6bd6d9b | 547 | timestamp_begin); |
309167d2 JD |
548 | } |
549 | ||
550 | /* Returns the timestamp end of the current sub-buffer. */ | |
551 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
552 | { | |
5226f1bc | 553 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
a6bd6d9b | 554 | timestamp_end); |
309167d2 JD |
555 | } |
556 | ||
557 | /* Returns the number of discarded events in the current sub-buffer. */ | |
558 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
559 | { | |
5226f1bc | 560 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
a6bd6d9b | 561 | events_discarded); |
309167d2 JD |
562 | } |
563 | ||
564 | /* Returns the content size in the current sub-buffer. */ | |
565 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
566 | { | |
5226f1bc | 567 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
a6bd6d9b | 568 | content_size); |
309167d2 JD |
569 | } |
570 | ||
571 | /* Returns the packet size in the current sub-buffer. */ | |
572 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
573 | { | |
5226f1bc JG |
574 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, |
575 | packet_size); | |
309167d2 JD |
576 | } |
577 | ||
578 | /* Returns the stream id of the current sub-buffer. */ | |
579 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
580 | { | |
5226f1bc JG |
581 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, |
582 | stream_id); | |
309167d2 | 583 | } |
d3e2ba59 JD |
584 | |
585 | /* Returns the current timestamp. */ | |
586 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
587 | { | |
5226f1bc JG |
588 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, |
589 | ts); | |
d3e2ba59 | 590 | } |
fb83fe64 JD |
591 | |
592 | /* Returns the packet sequence number of the current sub-buffer. */ | |
593 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
594 | { | |
5226f1bc | 595 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 596 | } |
000fa86f JD |
597 | |
598 | /* Returns the stream instance id. */ | |
599 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
600 | { | |
5226f1bc | 601 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 602 | } |