Commit | Line | Data |
---|---|---|
ee0326c0 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca> |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
ee0326c0 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
ee0326c0 | 7 | * |
ee0326c0 | 8 | */ |
16421f6e | 9 | |
6c1c0768 | 10 | #define _LGPL_SOURCE |
95ba0f2f | 11 | #define __USE_LINUX_IOCTL_DEFS |
16421f6e | 12 | #include <sys/ioctl.h> |
4dbc372b | 13 | #include <string.h> |
46820c8b | 14 | #include <common/align.h> |
8ff4109e | 15 | #include <common/macros.h> |
00a62084 | 16 | #include <errno.h> |
a6bd6d9b JG |
17 | #include <stdarg.h> |
18 | #include <assert.h> | |
e04b2181 | 19 | #include <common/time.h> |
16421f6e | 20 | |
10a8a223 | 21 | #include "kernel-ctl.h" |
16421f6e | 22 | #include "kernel-ioctl.h" |
16421f6e | 23 | |
5226f1bc | 24 | #define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \ |
a6bd6d9b JG |
25 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ |
26 | assert(ret <= 0); \ | |
5226f1bc JG |
27 | !ret ? 0 : -errno; \ |
28 | }) | |
29 | ||
30 | #define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \ | |
31 | int ret = ioctl(fildes, request, ##__VA_ARGS__);\ | |
32 | ret >= 0 ? ret : -errno; \ | |
a6bd6d9b JG |
33 | }) |
34 | ||
4dbc372b JD |
35 | /* |
36 | * This flag indicates which version of the kernel ABI to use. The old | |
37 | * ABI (namespace _old) does not support a 32-bit user-space when the | |
38 | * kernel is 64-bit. The old ABI is kept here for compatibility but is | |
39 | * deprecated and will be removed eventually. | |
40 | */ | |
41 | static int lttng_kernel_use_old_abi = -1; | |
42 | ||
43 | /* | |
44 | * Execute the new or old ioctl depending on the ABI version. | |
45 | * If the ABI version is not determined yet (lttng_kernel_use_old_abi = -1), | |
46 | * this function tests if the new ABI is available and otherwise fallbacks | |
47 | * on the old one. | |
48 | * This function takes the fd on which the ioctl must be executed and the old | |
49 | * and new request codes. | |
50 | * It returns the return value of the ioctl executed. | |
51 | */ | |
52 | static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, | |
53 | unsigned long newname) | |
54 | { | |
55 | int ret; | |
56 | ||
57 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 58 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
59 | if (!ret) { |
60 | lttng_kernel_use_old_abi = 0; | |
61 | goto end; | |
62 | } | |
63 | lttng_kernel_use_old_abi = 1; | |
64 | } | |
65 | if (lttng_kernel_use_old_abi) { | |
5226f1bc | 66 | ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); |
4dbc372b | 67 | } else { |
5226f1bc | 68 | ret = LTTNG_IOCTL_NO_CHECK(fd, newname); |
4dbc372b JD |
69 | } |
70 | ||
71 | end: | |
72 | return ret; | |
73 | } | |
74 | ||
964ccb60 | 75 | int kernctl_create_session(int fd) |
d65106b1 | 76 | { |
4dbc372b JD |
77 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION, |
78 | LTTNG_KERNEL_SESSION); | |
d65106b1 DG |
79 | } |
80 | ||
964ccb60 MD |
81 | /* open the metadata global channel */ |
82 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) | |
f3ed775e | 83 | { |
4dbc372b JD |
84 | struct lttng_kernel_channel channel; |
85 | ||
86 | if (lttng_kernel_use_old_abi) { | |
10600be0 MD |
87 | struct lttng_kernel_old_channel old_channel; |
88 | ||
89 | memset(&old_channel, 0, sizeof(old_channel)); | |
4dbc372b JD |
90 | old_channel.overwrite = chops->overwrite; |
91 | old_channel.subbuf_size = chops->subbuf_size; | |
92 | old_channel.num_subbuf = chops->num_subbuf; | |
93 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
94 | old_channel.read_timer_interval = chops->read_timer_interval; | |
95 | old_channel.output = chops->output; | |
f853c53a DG |
96 | |
97 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
98 | /* | |
99 | * The new channel padding is smaller than the old ABI so we use the | |
100 | * new ABI padding size for the memcpy. | |
101 | */ | |
102 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 103 | |
5226f1bc JG |
104 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_METADATA, |
105 | &old_channel); | |
4dbc372b JD |
106 | } |
107 | ||
10600be0 | 108 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
109 | channel.overwrite = chops->overwrite; |
110 | channel.subbuf_size = chops->subbuf_size; | |
111 | channel.num_subbuf = chops->num_subbuf; | |
112 | channel.switch_timer_interval = chops->switch_timer_interval; | |
113 | channel.read_timer_interval = chops->read_timer_interval; | |
114 | channel.output = chops->output; | |
ea207e3b | 115 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 116 | |
5226f1bc | 117 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_METADATA, &channel); |
f3ed775e DG |
118 | } |
119 | ||
120 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) | |
16421f6e | 121 | { |
4dbc372b JD |
122 | struct lttng_kernel_channel channel; |
123 | ||
c74101ef | 124 | memset(&channel, 0, sizeof(channel)); |
4dbc372b JD |
125 | if (lttng_kernel_use_old_abi) { |
126 | struct lttng_kernel_old_channel old_channel; | |
127 | ||
128 | old_channel.overwrite = chops->overwrite; | |
129 | old_channel.subbuf_size = chops->subbuf_size; | |
130 | old_channel.num_subbuf = chops->num_subbuf; | |
131 | old_channel.switch_timer_interval = chops->switch_timer_interval; | |
132 | old_channel.read_timer_interval = chops->read_timer_interval; | |
133 | old_channel.output = chops->output; | |
f853c53a DG |
134 | |
135 | memset(old_channel.padding, 0, sizeof(old_channel.padding)); | |
136 | /* | |
137 | * The new channel padding is smaller than the old ABI so we use the | |
138 | * new ABI padding size for the memcpy. | |
139 | */ | |
140 | memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); | |
4dbc372b | 141 | |
5226f1bc JG |
142 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_CHANNEL, |
143 | &old_channel); | |
4dbc372b JD |
144 | } |
145 | ||
146 | channel.overwrite = chops->overwrite; | |
147 | channel.subbuf_size = chops->subbuf_size; | |
148 | channel.num_subbuf = chops->num_subbuf; | |
149 | channel.switch_timer_interval = chops->switch_timer_interval; | |
150 | channel.read_timer_interval = chops->read_timer_interval; | |
151 | channel.output = chops->output; | |
ea207e3b | 152 | memcpy(channel.padding, chops->padding, sizeof(chops->padding)); |
4dbc372b | 153 | |
5226f1bc | 154 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_CHANNEL, &channel); |
16421f6e DG |
155 | } |
156 | ||
46820c8b MD |
157 | int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) |
158 | { | |
159 | struct lttng_kernel_syscall_mask kmask_len, *kmask = NULL; | |
160 | size_t array_alloc_len; | |
161 | char *new_mask; | |
162 | int ret = 0; | |
163 | ||
164 | if (!syscall_mask) { | |
165 | ret = -1; | |
166 | goto end; | |
167 | } | |
168 | ||
169 | if (!nr_bits) { | |
170 | ret = -1; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | kmask_len.len = 0; | |
5226f1bc | 175 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, &kmask_len); |
46820c8b MD |
176 | if (ret) { |
177 | goto end; | |
178 | } | |
179 | ||
180 | array_alloc_len = ALIGN(kmask_len.len, 8) >> 3; | |
834978fd | 181 | |
46820c8b MD |
182 | kmask = zmalloc(sizeof(*kmask) + array_alloc_len); |
183 | if (!kmask) { | |
184 | ret = -1; | |
185 | goto end; | |
186 | } | |
187 | ||
188 | kmask->len = kmask_len.len; | |
5226f1bc | 189 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SYSCALL_MASK, kmask); |
46820c8b MD |
190 | if (ret) { |
191 | goto end; | |
192 | } | |
193 | ||
834978fd | 194 | new_mask = realloc(*syscall_mask, array_alloc_len); |
46820c8b MD |
195 | if (!new_mask) { |
196 | ret = -1; | |
197 | goto end; | |
198 | } | |
199 | memcpy(new_mask, kmask->mask, array_alloc_len); | |
200 | *syscall_mask = new_mask; | |
201 | *nr_bits = kmask->len; | |
202 | ||
203 | end: | |
204 | free(kmask); | |
205 | return ret; | |
206 | } | |
207 | ||
ccf10263 MD |
208 | int kernctl_track_pid(int fd, int pid) |
209 | { | |
5226f1bc | 210 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid); |
ccf10263 MD |
211 | } |
212 | ||
213 | int kernctl_untrack_pid(int fd, int pid) | |
214 | { | |
5226f1bc | 215 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid); |
ccf10263 MD |
216 | } |
217 | ||
a5dfbb9d MD |
218 | int kernctl_list_tracker_pids(int fd) |
219 | { | |
5226f1bc | 220 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS); |
a5dfbb9d MD |
221 | } |
222 | ||
d01c0e56 MD |
223 | static enum lttng_kernel_tracker_type get_kernel_tracker_type( |
224 | enum lttng_tracker_type type) | |
225 | { | |
226 | switch (type) { | |
227 | case LTTNG_TRACKER_PID: | |
228 | return LTTNG_KERNEL_TRACKER_PID; | |
229 | case LTTNG_TRACKER_VPID: | |
230 | return LTTNG_KERNEL_TRACKER_VPID; | |
231 | case LTTNG_TRACKER_UID: | |
232 | return LTTNG_KERNEL_TRACKER_UID; | |
233 | case LTTNG_TRACKER_VUID: | |
234 | return LTTNG_KERNEL_TRACKER_VUID; | |
235 | case LTTNG_TRACKER_GID: | |
236 | return LTTNG_KERNEL_TRACKER_GID; | |
237 | case LTTNG_TRACKER_VGID: | |
238 | return LTTNG_KERNEL_TRACKER_VGID; | |
239 | default: | |
240 | return LTTNG_KERNEL_TRACKER_UNKNOWN; | |
241 | } | |
242 | } | |
243 | ||
244 | int kernctl_track_id(int fd, enum lttng_tracker_type tracker_type, int id) | |
245 | { | |
246 | struct lttng_kernel_tracker_args args; | |
247 | ||
248 | args.id = id; | |
249 | args.type = get_kernel_tracker_type(tracker_type); | |
250 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
251 | errno = EINVAL; | |
252 | return -1; | |
253 | } | |
254 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_ID, &args); | |
255 | } | |
256 | ||
257 | int kernctl_untrack_id(int fd, enum lttng_tracker_type tracker_type, int id) | |
258 | { | |
259 | struct lttng_kernel_tracker_args args; | |
260 | ||
261 | args.id = id; | |
262 | args.type = get_kernel_tracker_type(tracker_type); | |
263 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
264 | errno = EINVAL; | |
265 | return -1; | |
266 | } | |
267 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_ID, &args); | |
268 | } | |
269 | ||
270 | int kernctl_list_tracker_ids(int fd, enum lttng_tracker_type tracker_type) | |
271 | { | |
272 | struct lttng_kernel_tracker_args args; | |
273 | ||
274 | args.id = -1; | |
275 | args.type = get_kernel_tracker_type(tracker_type); | |
276 | if (args.type == LTTNG_KERNEL_TRACKER_UNKNOWN) { | |
277 | errno = EINVAL; | |
278 | return -1; | |
279 | } | |
280 | return LTTNG_IOCTL_NO_CHECK( | |
281 | fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_IDS, &args); | |
282 | } | |
283 | ||
eded6438 | 284 | int kernctl_session_regenerate_metadata(int fd) |
93ec662e | 285 | { |
5226f1bc | 286 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN); |
93ec662e JD |
287 | } |
288 | ||
c2561365 JD |
289 | int kernctl_session_regenerate_statedump(int fd) |
290 | { | |
291 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP); | |
292 | } | |
293 | ||
8ff4109e JR |
294 | int kernctl_session_set_name(int fd, const char *name) |
295 | { | |
296 | int ret; | |
297 | struct lttng_kernel_session_name session_name; | |
298 | ||
299 | ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); | |
300 | if (ret) { | |
301 | goto end; | |
302 | } | |
303 | ||
304 | ret = LTTNG_IOCTL_CHECK( | |
305 | fd, LTTNG_KERNEL_SESSION_SET_NAME, &session_name); | |
306 | end: | |
307 | return ret; | |
308 | } | |
309 | ||
e04b2181 JR |
310 | int kernctl_session_set_creation_time(int fd, time_t time) |
311 | { | |
312 | int ret; | |
313 | struct lttng_kernel_session_creation_time creation_time; | |
314 | ||
315 | ret = time_to_iso8601_str(time, creation_time.iso8601, | |
316 | sizeof(creation_time.iso8601)); | |
317 | if (ret) { | |
318 | goto end; | |
319 | } | |
320 | ||
321 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_SET_CREATION_TIME, | |
322 | &creation_time); | |
323 | end: | |
324 | return ret; | |
325 | } | |
326 | ||
964ccb60 | 327 | int kernctl_create_stream(int fd) |
16421f6e | 328 | { |
4dbc372b JD |
329 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM, |
330 | LTTNG_KERNEL_STREAM); | |
16421f6e DG |
331 | } |
332 | ||
964ccb60 | 333 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
16421f6e | 334 | { |
4dbc372b JD |
335 | if (lttng_kernel_use_old_abi) { |
336 | struct lttng_kernel_old_event old_event; | |
337 | ||
10600be0 | 338 | memset(&old_event, 0, sizeof(old_event)); |
4dbc372b JD |
339 | memcpy(old_event.name, ev->name, sizeof(old_event.name)); |
340 | old_event.instrumentation = ev->instrumentation; | |
341 | switch (ev->instrumentation) { | |
342 | case LTTNG_KERNEL_KPROBE: | |
343 | old_event.u.kprobe.addr = ev->u.kprobe.addr; | |
344 | old_event.u.kprobe.offset = ev->u.kprobe.offset; | |
345 | memcpy(old_event.u.kprobe.symbol_name, | |
346 | ev->u.kprobe.symbol_name, | |
347 | sizeof(old_event.u.kprobe.symbol_name)); | |
348 | break; | |
349 | case LTTNG_KERNEL_KRETPROBE: | |
350 | old_event.u.kretprobe.addr = ev->u.kretprobe.addr; | |
351 | old_event.u.kretprobe.offset = ev->u.kretprobe.offset; | |
352 | memcpy(old_event.u.kretprobe.symbol_name, | |
353 | ev->u.kretprobe.symbol_name, | |
354 | sizeof(old_event.u.kretprobe.symbol_name)); | |
355 | break; | |
356 | case LTTNG_KERNEL_FUNCTION: | |
357 | memcpy(old_event.u.ftrace.symbol_name, | |
358 | ev->u.ftrace.symbol_name, | |
359 | sizeof(old_event.u.ftrace.symbol_name)); | |
360 | break; | |
361 | default: | |
362 | break; | |
363 | } | |
364 | ||
5226f1bc JG |
365 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_OLD_EVENT, |
366 | &old_event); | |
4dbc372b | 367 | } |
5226f1bc | 368 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev); |
16421f6e DG |
369 | } |
370 | ||
964ccb60 | 371 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
16421f6e | 372 | { |
4dbc372b JD |
373 | if (lttng_kernel_use_old_abi) { |
374 | struct lttng_kernel_old_context old_ctx; | |
375 | ||
10600be0 | 376 | memset(&old_ctx, 0, sizeof(old_ctx)); |
4dbc372b JD |
377 | old_ctx.ctx = ctx->ctx; |
378 | /* only type that uses the union */ | |
aa3514e9 | 379 | if (ctx->ctx == LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER) { |
4dbc372b JD |
380 | old_ctx.u.perf_counter.type = |
381 | ctx->u.perf_counter.type; | |
382 | old_ctx.u.perf_counter.config = | |
383 | ctx->u.perf_counter.config; | |
384 | memcpy(old_ctx.u.perf_counter.name, | |
385 | ctx->u.perf_counter.name, | |
386 | sizeof(old_ctx.u.perf_counter.name)); | |
387 | } | |
5226f1bc | 388 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_CONTEXT, &old_ctx); |
4dbc372b | 389 | } |
5226f1bc | 390 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx); |
16421f6e DG |
391 | } |
392 | ||
964ccb60 | 393 | |
5226f1bc | 394 | /* Enable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
395 | int kernctl_enable(int fd) |
396 | { | |
4dbc372b JD |
397 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE, |
398 | LTTNG_KERNEL_ENABLE); | |
f3ed775e DG |
399 | } |
400 | ||
5226f1bc | 401 | /* Disable event, channel and session LTTNG_IOCTL_CHECK */ |
f3ed775e DG |
402 | int kernctl_disable(int fd) |
403 | { | |
4dbc372b JD |
404 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE, |
405 | LTTNG_KERNEL_DISABLE); | |
f3ed775e DG |
406 | } |
407 | ||
964ccb60 | 408 | int kernctl_start_session(int fd) |
16421f6e | 409 | { |
4dbc372b JD |
410 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START, |
411 | LTTNG_KERNEL_SESSION_START); | |
964ccb60 MD |
412 | } |
413 | ||
414 | int kernctl_stop_session(int fd) | |
415 | { | |
4dbc372b JD |
416 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP, |
417 | LTTNG_KERNEL_SESSION_STOP); | |
16421f6e DG |
418 | } |
419 | ||
d3a684ee JR |
420 | int kernctl_create_trigger_group(int fd) |
421 | { | |
422 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_TRIGGER_GROUP_CREATE); | |
423 | } | |
424 | ||
425 | int kernctl_create_trigger_group_notification_fd(int group_fd) | |
426 | { | |
427 | return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_TRIGGER_GROUP_NOTIFICATION_FD); | |
428 | } | |
429 | ||
430 | int kernctl_create_trigger(int group_fd, struct lttng_kernel_trigger *trigger) | |
431 | { | |
432 | return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_TRIGGER_CREATE, trigger); | |
433 | } | |
434 | ||
435 | int kernctl_filter(int fd, const struct lttng_filter_bytecode *filter) | |
00a62084 MD |
436 | { |
437 | struct lttng_kernel_filter_bytecode *kb; | |
438 | uint32_t len; | |
439 | int ret; | |
440 | ||
441 | /* Translate bytecode to kernel bytecode */ | |
442 | kb = zmalloc(sizeof(*kb) + filter->len); | |
443 | if (!kb) | |
444 | return -ENOMEM; | |
445 | kb->len = len = filter->len; | |
446 | kb->reloc_offset = filter->reloc_table_offset; | |
447 | kb->seqnum = filter->seqnum; | |
448 | memcpy(kb->data, filter->data, len); | |
5226f1bc | 449 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_FILTER, kb); |
00a62084 MD |
450 | free(kb); |
451 | return ret; | |
452 | } | |
453 | ||
1ab8c2ad FD |
454 | int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite) |
455 | { | |
456 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite); | |
457 | } | |
458 | ||
964ccb60 MD |
459 | int kernctl_tracepoint_list(int fd) |
460 | { | |
4dbc372b JD |
461 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST, |
462 | LTTNG_KERNEL_TRACEPOINT_LIST); | |
964ccb60 MD |
463 | } |
464 | ||
d02666a9 MD |
465 | int kernctl_syscall_list(int fd) |
466 | { | |
5226f1bc | 467 | return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST); |
d02666a9 MD |
468 | } |
469 | ||
964ccb60 MD |
470 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
471 | { | |
4dbc372b JD |
472 | int ret; |
473 | ||
474 | if (lttng_kernel_use_old_abi == -1) { | |
5226f1bc | 475 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
476 | if (!ret) { |
477 | lttng_kernel_use_old_abi = 0; | |
478 | goto end; | |
479 | } | |
480 | lttng_kernel_use_old_abi = 1; | |
481 | } | |
482 | if (lttng_kernel_use_old_abi) { | |
483 | struct lttng_kernel_old_tracer_version old_v; | |
484 | ||
5226f1bc | 485 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_OLD_TRACER_VERSION, &old_v); |
4dbc372b JD |
486 | if (ret) { |
487 | goto end; | |
488 | } | |
489 | v->major = old_v.major; | |
490 | v->minor = old_v.minor; | |
491 | v->patchlevel = old_v.patchlevel; | |
492 | } else { | |
5226f1bc | 493 | ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
4dbc372b JD |
494 | } |
495 | ||
496 | end: | |
497 | return ret; | |
964ccb60 MD |
498 | } |
499 | ||
c052142c MD |
500 | int kernctl_tracer_abi_version(int fd, |
501 | struct lttng_kernel_tracer_abi_version *v) | |
502 | { | |
5226f1bc | 503 | return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v); |
c052142c MD |
504 | } |
505 | ||
964ccb60 MD |
506 | int kernctl_wait_quiescent(int fd) |
507 | { | |
4dbc372b JD |
508 | return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT, |
509 | LTTNG_KERNEL_WAIT_QUIESCENT); | |
964ccb60 MD |
510 | } |
511 | ||
964ccb60 MD |
512 | int kernctl_buffer_flush(int fd) |
513 | { | |
5226f1bc | 514 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH); |
964ccb60 MD |
515 | } |
516 | ||
f22dd891 MD |
517 | int kernctl_buffer_flush_empty(int fd) |
518 | { | |
519 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY); | |
520 | } | |
521 | ||
99930a9d JR |
522 | int kernctl_buffer_clear(int fd) |
523 | { | |
524 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR); | |
525 | } | |
526 | ||
93ec662e JD |
527 | /* returns the version of the metadata. */ |
528 | int kernctl_get_metadata_version(int fd, uint64_t *version) | |
529 | { | |
5226f1bc | 530 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version); |
93ec662e JD |
531 | } |
532 | ||
8024cc8c JD |
533 | int kernctl_metadata_cache_dump(int fd) |
534 | { | |
535 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP); | |
536 | } | |
964ccb60 MD |
537 | |
538 | /* Buffer operations */ | |
539 | ||
540 | /* For mmap mode, readable without "get" operation */ | |
541 | ||
16421f6e DG |
542 | /* returns the length to mmap. */ |
543 | int kernctl_get_mmap_len(int fd, unsigned long *len) | |
544 | { | |
5226f1bc | 545 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_LEN, len); |
16421f6e DG |
546 | } |
547 | ||
964ccb60 MD |
548 | /* returns the maximum size for sub-buffers. */ |
549 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) | |
550 | { | |
5226f1bc | 551 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
964ccb60 MD |
552 | } |
553 | ||
554 | /* | |
555 | * For mmap mode, operate on the current packet (between get/put or | |
556 | * get_next/put_next). | |
557 | */ | |
558 | ||
16421f6e DG |
559 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
560 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) | |
561 | { | |
5226f1bc | 562 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
16421f6e DG |
563 | } |
564 | ||
964ccb60 MD |
565 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
566 | int kernctl_get_subbuf_size(int fd, unsigned long *len) | |
16421f6e | 567 | { |
5226f1bc | 568 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
16421f6e DG |
569 | } |
570 | ||
571 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
572 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) | |
573 | { | |
5226f1bc | 574 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
16421f6e DG |
575 | } |
576 | ||
964ccb60 MD |
577 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
578 | int kernctl_get_next_subbuf(int fd) | |
16421f6e | 579 | { |
5226f1bc | 580 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
16421f6e DG |
581 | } |
582 | ||
d4a1283e | 583 | |
16421f6e DG |
584 | /* Release exclusive sub-buffer access, move consumer forward. */ |
585 | int kernctl_put_next_subbuf(int fd) | |
586 | { | |
5226f1bc | 587 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
16421f6e DG |
588 | } |
589 | ||
964ccb60 | 590 | /* snapshot */ |
16421f6e DG |
591 | |
592 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
593 | int kernctl_snapshot(int fd) | |
594 | { | |
5226f1bc | 595 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT); |
16421f6e DG |
596 | } |
597 | ||
b007ec59 JG |
598 | /* |
599 | * Get a snapshot of the current ring buffer producer and consumer positions, | |
600 | * regardless of whether or not the two positions are contained within the | |
601 | * same sub-buffer. | |
602 | */ | |
603 | int kernctl_snapshot_sample_positions(int fd) | |
604 | { | |
605 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); | |
606 | } | |
607 | ||
16421f6e DG |
608 | /* Get the consumer position (iteration start) */ |
609 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) | |
610 | { | |
5226f1bc | 611 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
16421f6e DG |
612 | } |
613 | ||
614 | /* Get the producer position (iteration end) */ | |
615 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) | |
616 | { | |
5226f1bc | 617 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
16421f6e DG |
618 | } |
619 | ||
964ccb60 MD |
620 | /* Get exclusive read access to the specified sub-buffer position */ |
621 | int kernctl_get_subbuf(int fd, unsigned long *len) | |
f3ed775e | 622 | { |
5226f1bc | 623 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len); |
f3ed775e | 624 | } |
d0254c7c | 625 | |
964ccb60 MD |
626 | /* Release exclusive sub-buffer access */ |
627 | int kernctl_put_subbuf(int fd) | |
d0254c7c | 628 | { |
5226f1bc | 629 | return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_SUBBUF); |
d0254c7c | 630 | } |
309167d2 JD |
631 | |
632 | /* Returns the timestamp begin of the current sub-buffer. */ | |
633 | int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) | |
634 | { | |
5226f1bc | 635 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN, |
a6bd6d9b | 636 | timestamp_begin); |
309167d2 JD |
637 | } |
638 | ||
639 | /* Returns the timestamp end of the current sub-buffer. */ | |
640 | int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) | |
641 | { | |
5226f1bc | 642 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_TIMESTAMP_END, |
a6bd6d9b | 643 | timestamp_end); |
309167d2 JD |
644 | } |
645 | ||
646 | /* Returns the number of discarded events in the current sub-buffer. */ | |
647 | int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) | |
648 | { | |
5226f1bc | 649 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED, |
a6bd6d9b | 650 | events_discarded); |
309167d2 JD |
651 | } |
652 | ||
653 | /* Returns the content size in the current sub-buffer. */ | |
654 | int kernctl_get_content_size(int fd, uint64_t *content_size) | |
655 | { | |
5226f1bc | 656 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CONTENT_SIZE, |
a6bd6d9b | 657 | content_size); |
309167d2 JD |
658 | } |
659 | ||
660 | /* Returns the packet size in the current sub-buffer. */ | |
661 | int kernctl_get_packet_size(int fd, uint64_t *packet_size) | |
662 | { | |
5226f1bc JG |
663 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_PACKET_SIZE, |
664 | packet_size); | |
309167d2 JD |
665 | } |
666 | ||
667 | /* Returns the stream id of the current sub-buffer. */ | |
668 | int kernctl_get_stream_id(int fd, uint64_t *stream_id) | |
669 | { | |
5226f1bc JG |
670 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_STREAM_ID, |
671 | stream_id); | |
309167d2 | 672 | } |
d3e2ba59 JD |
673 | |
674 | /* Returns the current timestamp. */ | |
675 | int kernctl_get_current_timestamp(int fd, uint64_t *ts) | |
676 | { | |
5226f1bc JG |
677 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP, |
678 | ts); | |
d3e2ba59 | 679 | } |
fb83fe64 JD |
680 | |
681 | /* Returns the packet sequence number of the current sub-buffer. */ | |
682 | int kernctl_get_sequence_number(int fd, uint64_t *seq) | |
683 | { | |
5226f1bc | 684 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_GET_SEQ_NUM, seq); |
fb83fe64 | 685 | } |
000fa86f JD |
686 | |
687 | /* Returns the stream instance id. */ | |
688 | int kernctl_get_instance_id(int fd, uint64_t *id) | |
689 | { | |
5226f1bc | 690 | return LTTNG_IOCTL_CHECK(fd, LTTNG_RING_BUFFER_INSTANCE_ID, id); |
000fa86f | 691 | } |