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> | |
e04b2181 | 29 | #include <common/time.h> |
16421f6e | 30 | |
10a8a223 | 31 | #include "kernel-ctl.h" |
16421f6e | 32 | #include "kernel-ioctl.h" |
16421f6e | 33 | |
5226f1bc | 34 | #define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \ |
a6bd6d9b JG |
35 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ |
36 | assert(ret <= 0); \ | |
5226f1bc JG |
37 | !ret ? 0 : -errno; \ |
38 | }) | |
39 | ||
40 | #define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \ | |
41 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ | |
42 | ret >= 0 ? ret : -errno; \ | |
a6bd6d9b JG |
43 | }) |
44 | ||
4dbc372b JD |
45 | /* |
46 | * This flag indicates which version of the kernel ABI to use. The old | |
47 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
48 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
49 | * deprecated and will be removed eventually. | |
50 | */ | |
51 | static int lttng_kernel_use_old_abi = -1; | |
52 | ||
53 | /* | |
54 | * Execute the new or old ioctl depending on the ABI version. | |
55 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
56 | * this function tests if the new ABI is available and otherwise fallbacks | |
57 | * on the old one. | |
58 | * This function takes the fd on which the ioctl must be executed and the old | |
59 | * and new request codes. | |
60 | * It returns the return value of the ioctl executed. | |
61 | */ | |
62 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
63 | unsigned long newname) | |
64 | { | |
65 | int ret; | |
66 | ||
67 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 68 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
69 | if (!ret) { |
70 | lttng_kernel_use_old_abi = 0; | |
71 | goto end; | |
72 | } | |
73 | lttng_kernel_use_old_abi = 1; | |
74 | } | |
75 | if (lttng_kernel_use_old_abi) { | |
5226f1bc | 76 | ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); |
4dbc372b | 77 | } else { |
5226f1bc | 78 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
79 | } |
80 | ||
81 | end: | |
82 | return ret; | |
83 | } | |
84 | ||
964ccb60 | 85 | int kernctl_create_session(int fd) |
d65106b1 | 86 | { |
4dbc372b JD |
87 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
88 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
89 | } |
90 | ||
964ccb60 MD |
91 | /* open the metadata global channel */ |
92 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 93 | { |
4dbc372b JD |
94 | struct lttng_kernel_channel channel; |
95 | ||
96 | if (lttng_kernel_use_old_abi) { | |
10600be0 MD |
97 | struct lttng_kernel_old_channel old_channel; |
98 | ||
99 | memset(&old_channel, 0, sizeof(old_channel)); | |
4dbc372b JD |
100 | old_channel.overwrite = chops->overwrite; |
101 | old_channel.subbuf_size = chops->subbuf_size; | |
102 | old_channel.num_subbuf = chops->num_subbuf; | |
103 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
104 | old_channel.read_timer_interval = chops->read_timer_interval; | |
105 | old_channel.output = chops->output; | |
f853c53a DG |
106 | |
107 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
108 | /* | |
109 | * The new channel padding is smaller than the old ABI so we use the | |
110 | * new ABI padding size for the memcpy. | |
111 | */ | |
112 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 113 | |
5226f1bc JG |
114 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA, |
115 | &old_channel); | |
4dbc372b JD |
116 | } |
117 | ||
10600be0 | 118 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
119 | channel.overwrite = chops->overwrite; |
120 | channel.subbuf_size = chops->subbuf_size; | |
121 | channel.num_subbuf = chops->num_subbuf; | |
122 | channel.switch_timer_interval = chops->switch_timer_interval; | |
123 | channel.read_timer_interval = chops->read_timer_interval; | |
124 | channel.output = chops->output; | |
ea207e3b | 125 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 126 | |
5226f1bc | 127 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel); |
f3ed775e DG |
128 | } |
129 | ||
130 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 131 | { |
4dbc372b JD |
132 | struct lttng_kernel_channel channel; |
133 | ||
c74101ef | 134 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
135 | if (lttng_kernel_use_old_abi) { |
136 | struct lttng_kernel_old_channel old_channel; | |
137 | ||
138 | old_channel.overwrite = chops->overwrite; | |
139 | old_channel.subbuf_size = chops->subbuf_size; | |
140 | old_channel.num_subbuf = chops->num_subbuf; | |
141 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
142 | old_channel.read_timer_interval = chops->read_timer_interval; | |
143 | old_channel.output = chops->output; | |
f853c53a DG |
144 | |
145 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
146 | /* | |
147 | * The new channel padding is smaller than the old ABI so we use the | |
148 | * new ABI padding size for the memcpy. | |
149 | */ | |
150 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 151 | |
5226f1bc JG |
152 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL, |
153 | &old_channel); | |
4dbc372b JD |
154 | } |
155 | ||
156 | channel.overwrite = chops->overwrite; | |
157 | channel.subbuf_size = chops->subbuf_size; | |
158 | channel.num_subbuf = chops->num_subbuf; | |
159 | channel.switch_timer_interval = chops->switch_timer_interval; | |
160 | channel.read_timer_interval = chops->read_timer_interval; | |
161 | channel.output = chops->output; | |
ea207e3b | 162 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 163 | |
5226f1bc | 164 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel); |
16421f6e DG |
165 | } |
166 | ||
46820c8b MD |
167 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
168 | { | |
169 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
170 | size_t array_alloc_len; | |
171 | char *new_mask; | |
172 | int ret = 0; | |
173 | ||
174 | if (!syscall_mask) { | |
175 | ret = -1; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | if (!nr_bits) { | |
180 | ret = -1; | |
181 | goto end; | |
182 | } | |
183 | ||
184 | kmask_len.len = 0; | |
5226f1bc | 185 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
186 | if (ret) { |
187 | goto end; | |
188 | } | |
189 | ||
190 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 191 | |
46820c8b MD |
192 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
193 | if (!kmask) { | |
194 | ret = -1; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | kmask->len = kmask_len.len; | |
5226f1bc | 199 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
200 | if (ret) { |
201 | goto end; | |
202 | } | |
203 | ||
834978fd | 204 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
205 | if (!new_mask) { |
206 | ret = -1; | |
207 | goto end; | |
208 | } | |
209 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
210 | *syscall_mask = new_mask; | |
211 | *nr_bits = kmask->len; | |
212 | ||
213 | end: | |
214 | free(kmask); | |
215 | return ret; | |
216 | } | |
217 | ||
ccf10263 MD |
218 | int kernctl_track_pid(int fd, int pid) |
219 | { | |
5226f1bc | 220 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
221 | } |
222 | ||
223 | int kernctl_untrack_pid(int fd, int pid) | |
224 | { | |
5226f1bc | 225 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
226 | } |
227 | ||
a5dfbb9d MD |
228 | int kernctl_list_tracker_pids(int fd) |
229 | { | |
5226f1bc | 230 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); |
a5dfbb9d MD |
231 | } |
232 | ||
d01c0e56 MD |
233 | static enum lttng_kernel_tracker_type get_kernel_tracker_type( |
234 | enum lttng_tracker_type type) | |
235 | { | |
236 | switch (type) { | |
237 | case LTTNG_TRACKER_PID: | |
238 | return LTTNG_KERNEL_TRACKER_PID; | |
239 | case LTTNG_TRACKER_VPID: | |
240 | return LTTNG_KERNEL_TRACKER_VPID; | |
241 | case LTTNG_TRACKER_UID: | |
242 | return LTTNG_KERNEL_TRACKER_UID; | |
243 | case LTTNG_TRACKER_VUID: | |
244 | return LTTNG_KERNEL_TRACKER_VUID; | |
245 | case LTTNG_TRACKER_GID: | |
246 | return LTTNG_KERNEL_TRACKER_GID; | |
247 | case LTTNG_TRACKER_VGID: | |
248 | return LTTNG_KERNEL_TRACKER_VGID; | |
249 | default: | |
250 | return LTTNG_KERNEL_TRACKER_UNKNOWN; | |
251 | } | |
252 | } | |
253 | ||
254 | int kernctl_track_id(int fd, enum lttng_tracker_type tracker_type, int id) | |
255 | { | |
256 | struct lttng_kernel_tracker_args args; | |
257 | ||
258 | args.id = id; | |
259 | args.type = get_kernel_tracker_type(tracker_type); | |
260 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
261 | errno = EINVAL; | |
262 | return -1; | |
263 | } | |
264 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_ID, &args); | |
265 | } | |
266 | ||
267 | int kernctl_untrack_id(int fd, enum lttng_tracker_type tracker_type, int id) | |
268 | { | |
269 | struct lttng_kernel_tracker_args args; | |
270 | ||
271 | args.id = id; | |
272 | args.type = get_kernel_tracker_type(tracker_type); | |
273 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
274 | errno = EINVAL; | |
275 | return -1; | |
276 | } | |
277 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args); | |
278 | } | |
279 | ||
280 | int kernctl_list_tracker_ids(int fd, enum lttng_tracker_type tracker_type) | |
281 | { | |
282 | struct lttng_kernel_tracker_args args; | |
283 | ||
284 | args.id = -1; | |
285 | args.type = get_kernel_tracker_type(tracker_type); | |
286 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
287 | errno = EINVAL; | |
288 | return -1; | |
289 | } | |
290 | return LTTNG_IOCTL_NO_CHECK( | |
291 | fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS, &args); | |
292 | } | |
293 | ||
eded6438 | 294 | int kernctl_session_regenerate_metadata(int fd) |
93ec662e | 295 | { |
5226f1bc | 296 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
297 | } |
298 | ||
c2561365 JD |
299 | int kernctl_session_regenerate_statedump(int fd) |
300 | { | |
301 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); | |
302 | } | |
303 | ||
8ff4109e JR |
304 | int kernctl_session_set_name(int fd, const char *name) |
305 | { | |
306 | int ret; | |
307 | struct lttng_kernel_session_name session_name; | |
308 | ||
309 | ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); | |
310 | if (ret) { | |
311 | goto end; | |
312 | } | |
313 | ||
314 | ret = LTTNG_IOCTL_CHECK( | |
315 | fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name); | |
316 | end: | |
317 | return ret; | |
318 | } | |
319 | ||
e04b2181 JR |
320 | int kernctl_session_set_creation_time(int fd, time_t time) |
321 | { | |
322 | int ret; | |
323 | struct lttng_kernel_session_creation_time creation_time; | |
324 | ||
325 | ret = time_to_iso8601_str(time, creation_time.iso8601, | |
326 | sizeof(creation_time.iso8601)); | |
327 | if (ret) { | |
328 | goto end; | |
329 | } | |
330 | ||
331 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_SET_CREATION_TIME, | |
332 | &creation_time); | |
333 | end: | |
334 | return ret; | |
335 | } | |
336 | ||
964ccb60 | 337 | int kernctl_create_stream(int fd) |
16421f6e | 338 | { |
4dbc372b JD |
339 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
340 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
341 | } |
342 | ||
964ccb60 | 343 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 344 | { |
4dbc372b JD |
345 | if (lttng_kernel_use_old_abi) { |
346 | struct lttng_kernel_old_event old_event; | |
347 | ||
10600be0 | 348 | memset(&old_event, 0, sizeof(old_event)); |
4dbc372b JD |
349 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); |
350 | old_event.instrumentation = ev->instrumentation; | |
351 | switch (ev->instrumentation) { | |
352 | case LTTNG_KERNEL_KPROBE: | |
353 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
354 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
355 | memcpy(old_event.u.kprobe.symbol_name, | |
356 | ev->u.kprobe.symbol_name, | |
357 | sizeof(old_event.u.kprobe.symbol_name)); | |
358 | break; | |
359 | case LTTNG_KERNEL_KRETPROBE: | |
360 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
361 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
362 | memcpy(old_event.u.kretprobe.symbol_name, | |
363 | ev->u.kretprobe.symbol_name, | |
364 | sizeof(old_event.u.kretprobe.symbol_name)); | |
365 | break; | |
366 | case LTTNG_KERNEL_FUNCTION: | |
367 | memcpy(old_event.u.ftrace.symbol_name, | |
368 | ev->u.ftrace.symbol_name, | |
369 | sizeof(old_event.u.ftrace.symbol_name)); | |
370 | break; | |
371 | default: | |
372 | break; | |
373 | } | |
374 | ||
5226f1bc JG |
375 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT, |
376 | &old_event); | |
4dbc372b | 377 | } |
5226f1bc | 378 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
379 | } |
380 | ||
964ccb60 | 381 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 382 | { |
4dbc372b JD |
383 | if (lttng_kernel_use_old_abi) { |
384 | struct lttng_kernel_old_context old_ctx; | |
385 | ||
10600be0 | 386 | memset(&old_ctx, 0, sizeof(old_ctx)); |
4dbc372b JD |
387 | old_ctx.ctx = ctx->ctx; |
388 | /* only type that uses the union */ | |
aa3514e9 | 389 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
390 | old_ctx.u.perf_counter.type = |
391 | ctx->u.perf_counter.type; | |
392 | old_ctx.u.perf_counter.config = | |
393 | ctx->u.perf_counter.config; | |
394 | memcpy(old_ctx.u.perf_counter.name, | |
395 | ctx->u.perf_counter.name, | |
396 | sizeof(old_ctx.u.perf_counter.name)); | |
397 | } | |
5226f1bc | 398 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 399 | } |
5226f1bc | 400 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
401 | } |
402 | ||
964ccb60 | 403 | |
5226f1bc | 404 | /* Enable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
405 | int kernctl_enable(int fd) |
406 | { | |
4dbc372b JD |
407 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
408 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
409 | } |
410 | ||
5226f1bc | 411 | /* Disable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
412 | int kernctl_disable(int fd) |
413 | { | |
4dbc372b JD |
414 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
415 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
416 | } |
417 | ||
964ccb60 | 418 | int kernctl_start_session(int fd) |
16421f6e | 419 | { |
4dbc372b JD |
420 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
421 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
422 | } |
423 | ||
424 | int kernctl_stop_session(int fd) | |
425 | { | |
4dbc372b JD |
426 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
427 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
428 | } |
429 | ||
00a62084 MD |
430 | int kernctl_filter(int fd, struct lttng_filter_bytecode *filter) |
431 | { | |
432 | struct lttng_kernel_filter_bytecode *kb; | |
433 | uint32_t len; | |
434 | int ret; | |
435 | ||
436 | /* Translate bytecode to kernel bytecode */ | |
437 | kb = zmalloc(sizeof(*kb) + filter->len); | |
438 | if (!kb) | |
439 | return -ENOMEM; | |
440 | kb->len = len = filter->len; | |
441 | kb->reloc_offset = filter->reloc_table_offset; | |
442 | kb->seqnum = filter->seqnum; | |
443 | memcpy(kb->data, filter->data, len); | |
5226f1bc | 444 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
445 | free(kb); |
446 | return ret; | |
447 | } | |
448 | ||
1ab8c2ad FD |
449 | int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite) |
450 | { | |
451 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite); | |
452 | } | |
453 | ||
964ccb60 MD |
454 | int kernctl_tracepoint_list(int fd) |
455 | { | |
4dbc372b JD |
456 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
457 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
458 | } |
459 | ||
d02666a9 MD |
460 | int kernctl_syscall_list(int fd) |
461 | { | |
5226f1bc | 462 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST); |
d02666a9 MD |
463 | } |
464 | ||
964ccb60 MD |
465 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
466 | { | |
4dbc372b JD |
467 | int ret; |
468 | ||
469 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 470 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
471 | if (!ret) { |
472 | lttng_kernel_use_old_abi = 0; | |
473 | goto end; | |
474 | } | |
475 | lttng_kernel_use_old_abi = 1; | |
476 | } | |
477 | if (lttng_kernel_use_old_abi) { | |
478 | struct lttng_kernel_old_tracer_version old_v; | |
479 | ||
5226f1bc | 480 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
481 | if (ret) { |
482 | goto end; | |
483 | } | |
484 | v->major = old_v.major; | |
485 | v->minor = old_v.minor; | |
486 | v->patchlevel = old_v.patchlevel; | |
487 | } else { | |
5226f1bc | 488 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
489 | } |
490 | ||
491 | end: | |
492 | return ret; | |
964ccb60 MD |
493 | } |
494 | ||
c052142c MD |
495 | int kernctl_tracer_abi_version(int fd, |
496 | struct lttng_kernel_tracer_abi_version *v) | |
497 | { | |
5226f1bc | 498 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
499 | } |
500 | ||
964ccb60 MD |
501 | int kernctl_wait_quiescent(int fd) |
502 | { | |
4dbc372b JD |
503 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
504 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
505 | } |
506 | ||
964ccb60 MD |
507 | int kernctl_buffer_flush(int fd) |
508 | { | |
5226f1bc | 509 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
510 | } |
511 | ||
f22dd891 MD |
512 | int kernctl_buffer_flush_empty(int fd) |
513 | { | |
514 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY); | |
515 | } | |
516 | ||
99930a9d JR |
517 | int kernctl_buffer_clear(int fd) |
518 | { | |
519 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR); | |
520 | } | |
521 | ||
93ec662e JD |
522 | /* returns the version of the metadata. */ |
523 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
524 | { | |
5226f1bc | 525 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
526 | } |
527 | ||
8024cc8c JD |
528 | int kernctl_metadata_cache_dump(int fd) |
529 | { | |
530 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP); | |
531 | } | |
964ccb60 MD |
532 | |
533 | /* Buffer operations */ | |
534 | ||
535 | /* For mmap mode, readable without "get" operation */ | |
536 | ||
16421f6e DG |
537 | /* returns the length to mmap. */ |
538 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
539 | { | |
5226f1bc | 540 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
541 | } |
542 | ||
964ccb60 MD |
543 | /* returns the maximum size for sub-buffers. */ |
544 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
545 | { | |
5226f1bc | 546 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
547 | } |
548 | ||
549 | /* | |
550 | * For mmap mode, operate on the current packet (between get/put or | |
551 | * get_next/put_next). | |
552 | */ | |
553 | ||
16421f6e DG |
554 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
555 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
556 | { | |
5226f1bc | 557 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
558 | } |
559 | ||
964ccb60 MD |
560 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
561 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 562 | { |
5226f1bc | 563 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
564 | } |
565 | ||
566 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
567 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
568 | { | |
5226f1bc | 569 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
570 | } |
571 | ||
964ccb60 MD |
572 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
573 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 574 | { |
5226f1bc | 575 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
576 | } |
577 | ||
d4a1283e | 578 | |
16421f6e DG |
579 | /* Release exclusive sub-buffer access, move consumer forward. */ |
580 | int kernctl_put_next_subbuf(int fd) | |
581 | { | |
5226f1bc | 582 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
583 | } |
584 | ||
964ccb60 | 585 | /* snapshot */ |
16421f6e DG |
586 | |
587 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
588 | int kernctl_snapshot(int fd) | |
589 | { | |
5226f1bc | 590 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
591 | } |
592 | ||
b007ec59 JG |
593 | /* |
594 | * Get a snapshot of the current ring buffer producer and consumer positions, | |
595 | * regardless of whether or not the two positions are contained within the | |
596 | * same sub-buffer. | |
597 | */ | |
598 | int kernctl_snapshot_sample_positions(int fd) | |
599 | { | |
600 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); | |
601 | } | |
602 | ||
16421f6e DG |
603 | /* Get the consumer position (iteration start) */ |
604 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
605 | { | |
5226f1bc | 606 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
607 | } |
608 | ||
609 | /* Get the producer position (iteration end) */ | |
610 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
611 | { | |
5226f1bc | 612 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
613 | } |
614 | ||
964ccb60 MD |
615 | /* Get exclusive read access to the specified sub-buffer position */ |
616 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 617 | { |
5226f1bc | 618 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 619 | } |
d0254c7c | 620 | |
964ccb60 MD |
621 | /* Release exclusive sub-buffer access */ |
622 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 623 | { |
5226f1bc | 624 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 625 | } |
309167d2 JD |
626 | |
627 | /* Returns the timestamp begin of the current sub-buffer. */ | |
628 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
629 | { | |
5226f1bc | 630 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
a6bd6d9b | 631 | timestamp_begin); |
309167d2 JD |
632 | } |
633 | ||
634 | /* Returns the timestamp end of the current sub-buffer. */ | |
635 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
636 | { | |
5226f1bc | 637 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
a6bd6d9b | 638 | timestamp_end); |
309167d2 JD |
639 | } |
640 | ||
641 | /* Returns the number of discarded events in the current sub-buffer. */ | |
642 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
643 | { | |
5226f1bc | 644 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
a6bd6d9b | 645 | events_discarded); |
309167d2 JD |
646 | } |
647 | ||
648 | /* Returns the content size in the current sub-buffer. */ | |
649 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
650 | { | |
5226f1bc | 651 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
a6bd6d9b | 652 | content_size); |
309167d2 JD |
653 | } |
654 | ||
655 | /* Returns the packet size in the current sub-buffer. */ | |
656 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
657 | { | |
5226f1bc JG |
658 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, |
659 | packet_size); | |
309167d2 JD |
660 | } |
661 | ||
662 | /* Returns the stream id of the current sub-buffer. */ | |
663 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
664 | { | |
5226f1bc JG |
665 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, |
666 | stream_id); | |
309167d2 | 667 | } |
d3e2ba59 JD |
668 | |
669 | /* Returns the current timestamp. */ | |
670 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
671 | { | |
5226f1bc JG |
672 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, |
673 | ts); | |
d3e2ba59 | 674 | } |
fb83fe64 JD |
675 | |
676 | /* Returns the packet sequence number of the current sub-buffer. */ | |
677 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
678 | { | |
5226f1bc | 679 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 680 | } |
000fa86f JD |
681 | |
682 | /* Returns the stream instance id. */ | |
683 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
684 | { | |
5226f1bc | 685 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 686 | } |