Commit | Line | Data |
---|---|---|
57773204 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: GPL-2.0-only |
57773204 | 3 | * |
f350e97f | 4 | * Copyright (C) 2011 EfficiOS Inc. |
c0c0989a | 5 | * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
57773204 MD |
6 | */ |
7 | ||
fb31eb73 | 8 | #include <stdint.h> |
57773204 | 9 | #include <string.h> |
fb31eb73 | 10 | #include <sys/mman.h> |
4e79769f | 11 | #include <unistd.h> |
a834901f MD |
12 | #include <sys/types.h> |
13 | #include <sys/socket.h> | |
fb31eb73 | 14 | |
c62a3816 | 15 | #include <lttng/ust-config.h> |
4318ae1b MD |
16 | #include <lttng/ust-ctl.h> |
17 | #include <lttng/ust-abi.h> | |
3208818b | 18 | #include <lttng/ust-endian.h> |
fca97dfd | 19 | #include <lttng/ust-common.h> |
434897ee MD |
20 | #include <lttng/ust-sigbus.h> |
21 | #include <urcu/rculist.h> | |
bb7ad29d | 22 | |
9d315d6d MJ |
23 | #include "common/logging.h" |
24 | #include "common/ustcomm.h" | |
25 | #include "common/macros.h" | |
26 | #include "common/align.h" | |
57773204 | 27 | |
e4db8f98 MJ |
28 | #include "common/ringbuffer/backend.h" |
29 | #include "common/ringbuffer/frontend.h" | |
36c52fff | 30 | #include "common/events.h" |
6bd9392e | 31 | #include "common/wait.h" |
8cd08025 | 32 | #include "common/ringbuffer-clients/clients.h" |
910dcd72 | 33 | #include "common/getenv.h" |
8cd08025 MJ |
34 | #include "common/tracer.h" |
35 | #include "common/counter-clients/clients.h" | |
c80497fe | 36 | |
74cc1f59 | 37 | #include "common/smp.h" |
cdff92e0 | 38 | #include "common/counter/counter.h" |
ebabbf58 | 39 | |
c9023c93 MD |
40 | /* |
41 | * Number of milliseconds to retry before failing metadata writes on | |
42 | * buffer full condition. (10 seconds) | |
43 | */ | |
44 | #define LTTNG_METADATA_TIMEOUT_MSEC 10000 | |
57773204 | 45 | |
74d81a6c MD |
46 | /* |
47 | * Channel representation within consumer. | |
48 | */ | |
249cffb5 | 49 | struct lttng_ust_ctl_consumer_channel { |
e7bc0ef6 | 50 | struct lttng_ust_channel_buffer *chan; /* lttng channel buffers */ |
6b120308 | 51 | |
74d81a6c | 52 | /* initial attributes */ |
249cffb5 | 53 | struct lttng_ust_ctl_consumer_channel_attr attr; |
ff0f5728 MD |
54 | int wait_fd; /* monitor close() */ |
55 | int wakeup_fd; /* monitor close() */ | |
74d81a6c MD |
56 | }; |
57 | ||
58 | /* | |
59 | * Stream representation within consumer. | |
60 | */ | |
249cffb5 | 61 | struct lttng_ust_ctl_consumer_stream { |
b5457df5 | 62 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 63 | struct lttng_ust_ctl_consumer_channel *chan; |
74d81a6c MD |
64 | int shm_fd, wait_fd, wakeup_fd; |
65 | int cpu; | |
66 | uint64_t memory_map_size; | |
434897ee | 67 | void *memory_map_addr; |
74d81a6c MD |
68 | }; |
69 | ||
249cffb5 MJ |
70 | #define LTTNG_UST_CTL_COUNTER_ATTR_DIMENSION_MAX 8 |
71 | struct lttng_ust_ctl_counter_attr { | |
72 | enum lttng_ust_ctl_counter_arithmetic arithmetic; | |
73 | enum lttng_ust_ctl_counter_bitness bitness; | |
ebabbf58 MD |
74 | uint32_t nr_dimensions; |
75 | int64_t global_sum_step; | |
249cffb5 | 76 | struct lttng_ust_ctl_counter_dimension dimensions[LTTNG_UST_CTL_COUNTER_ATTR_DIMENSION_MAX]; |
81bc4972 | 77 | bool coalesce_hits; |
ebabbf58 MD |
78 | }; |
79 | ||
80 | /* | |
81 | * Counter representation within daemon. | |
82 | */ | |
249cffb5 | 83 | struct lttng_ust_ctl_daemon_counter { |
ebabbf58 MD |
84 | struct lib_counter *counter; |
85 | const struct lttng_counter_ops *ops; | |
249cffb5 | 86 | struct lttng_ust_ctl_counter_attr *attr; /* initial attributes */ |
ebabbf58 MD |
87 | }; |
88 | ||
434897ee MD |
89 | /* |
90 | * Evaluates to false if transaction begins, true if it has failed due to SIGBUS. | |
91 | * The entire transaction must complete before the current function returns. | |
92 | * A transaction can contain 0 or more tracked ranges as sigbus begin/end pairs. | |
93 | */ | |
94 | #define sigbus_begin() \ | |
95 | ({ \ | |
96 | assert(!lttng_ust_sigbus_state.jmp_ready); \ | |
97 | if (!lttng_ust_sigbus_state.head.next) { \ | |
98 | /* \ | |
99 | * Lazy init because static list initialisation is \ | |
100 | * problematic for TLS variable. \ | |
101 | */ \ | |
102 | CDS_INIT_LIST_HEAD(<tng_ust_sigbus_state.head); \ | |
103 | } \ | |
104 | if (sigsetjmp(lttng_ust_sigbus_state.sj_env, 1)) { \ | |
105 | /* SIGBUS. */ \ | |
106 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 0); \ | |
107 | true; \ | |
108 | } \ | |
109 | cmm_barrier(); \ | |
110 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 1); \ | |
111 | false; \ | |
112 | }) | |
113 | ||
114 | static void sigbus_end(void) | |
115 | { | |
116 | assert(lttng_ust_sigbus_state.jmp_ready); | |
117 | cmm_barrier(); | |
118 | CMM_STORE_SHARED(lttng_ust_sigbus_state.jmp_ready, 0); | |
119 | } | |
120 | ||
121 | static | |
122 | void lttng_ust_sigbus_add_range(struct lttng_ust_sigbus_range *range, void *start, size_t len) | |
123 | { | |
124 | range->start = start; | |
125 | range->end = (char *)start + len; | |
126 | cds_list_add_rcu(&range->node, <tng_ust_sigbus_state.head); | |
127 | cmm_barrier(); | |
128 | } | |
129 | ||
130 | static | |
131 | void lttng_ust_sigbus_del_range(struct lttng_ust_sigbus_range *range) | |
132 | { | |
133 | cmm_barrier(); | |
134 | cds_list_del_rcu(&range->node); | |
135 | } | |
136 | ||
137 | void lttng_ust_ctl_sigbus_handle(void *addr) | |
138 | { | |
139 | struct lttng_ust_sigbus_range *range; | |
140 | ||
141 | if (!CMM_LOAD_SHARED(lttng_ust_sigbus_state.jmp_ready)) | |
142 | return; | |
143 | cds_list_for_each_entry_rcu(range, <tng_ust_sigbus_state.head, node) { | |
144 | if (addr < range->start || addr >= range->end) | |
145 | continue; | |
146 | siglongjmp(lttng_ust_sigbus_state.sj_env, 1); | |
147 | } | |
148 | } | |
149 | ||
249cffb5 | 150 | int lttng_ust_ctl_release_handle(int sock, int handle) |
2be0e72c MD |
151 | { |
152 | struct ustcomm_ust_msg lum; | |
153 | struct ustcomm_ust_reply lur; | |
2be0e72c | 154 | |
74d81a6c MD |
155 | if (sock < 0 || handle < 0) |
156 | return 0; | |
157 | memset(&lum, 0, sizeof(lum)); | |
158 | lum.handle = handle; | |
fd17d7ce | 159 | lum.cmd = LTTNG_UST_ABI_RELEASE; |
74d81a6c | 160 | return ustcomm_send_app_cmd(sock, &lum, &lur); |
2be0e72c | 161 | } |
74d81a6c | 162 | |
12388166 MD |
163 | /* |
164 | * If sock is negative, it means we don't have to notify the other side | |
165 | * (e.g. application has already vanished). | |
166 | */ | |
249cffb5 | 167 | int lttng_ust_ctl_release_object(int sock, struct lttng_ust_abi_object_data *data) |
57773204 | 168 | { |
57773204 MD |
169 | int ret; |
170 | ||
9bfc503d MD |
171 | if (!data) |
172 | return -EINVAL; | |
173 | ||
74d81a6c | 174 | switch (data->type) { |
fd17d7ce | 175 | case LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL: |
ff0f5728 MD |
176 | if (data->u.channel.wakeup_fd >= 0) { |
177 | ret = close(data->u.channel.wakeup_fd); | |
178 | if (ret < 0) { | |
179 | ret = -errno; | |
180 | return ret; | |
181 | } | |
dd6c697c | 182 | data->u.channel.wakeup_fd = -1; |
ff0f5728 | 183 | } |
74d81a6c | 184 | free(data->u.channel.data); |
dd6c697c | 185 | data->u.channel.data = NULL; |
74d81a6c | 186 | break; |
fd17d7ce | 187 | case LTTNG_UST_ABI_OBJECT_TYPE_STREAM: |
74d81a6c MD |
188 | if (data->u.stream.shm_fd >= 0) { |
189 | ret = close(data->u.stream.shm_fd); | |
190 | if (ret < 0) { | |
191 | ret = -errno; | |
192 | return ret; | |
193 | } | |
dd6c697c | 194 | data->u.stream.shm_fd = -1; |
d26228ae | 195 | } |
74d81a6c MD |
196 | if (data->u.stream.wakeup_fd >= 0) { |
197 | ret = close(data->u.stream.wakeup_fd); | |
198 | if (ret < 0) { | |
199 | ret = -errno; | |
200 | return ret; | |
201 | } | |
dd6c697c | 202 | data->u.stream.wakeup_fd = -1; |
d26228ae | 203 | } |
74d81a6c | 204 | break; |
fd17d7ce MD |
205 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT: |
206 | case LTTNG_UST_ABI_OBJECT_TYPE_CONTEXT: | |
207 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER_GROUP: | |
208 | case LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER: | |
32ce8569 | 209 | break; |
fd17d7ce | 210 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER: |
ebabbf58 MD |
211 | free(data->u.counter.data); |
212 | data->u.counter.data = NULL; | |
213 | break; | |
fd17d7ce | 214 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL: |
ebabbf58 MD |
215 | if (data->u.counter_global.shm_fd >= 0) { |
216 | ret = close(data->u.counter_global.shm_fd); | |
217 | if (ret < 0) { | |
218 | ret = -errno; | |
219 | return ret; | |
220 | } | |
221 | data->u.counter_global.shm_fd = -1; | |
222 | } | |
223 | break; | |
fd17d7ce | 224 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU: |
ebabbf58 MD |
225 | if (data->u.counter_cpu.shm_fd >= 0) { |
226 | ret = close(data->u.counter_cpu.shm_fd); | |
227 | if (ret < 0) { | |
228 | ret = -errno; | |
229 | return ret; | |
230 | } | |
231 | data->u.counter_cpu.shm_fd = -1; | |
232 | } | |
233 | break; | |
74d81a6c MD |
234 | default: |
235 | assert(0); | |
d26228ae | 236 | } |
249cffb5 | 237 | return lttng_ust_ctl_release_handle(sock, data->handle); |
57773204 MD |
238 | } |
239 | ||
1c5e467e MD |
240 | /* |
241 | * Send registration done packet to the application. | |
242 | */ | |
249cffb5 | 243 | int lttng_ust_ctl_register_done(int sock) |
1c5e467e MD |
244 | { |
245 | struct ustcomm_ust_msg lum; | |
246 | struct ustcomm_ust_reply lur; | |
247 | int ret; | |
248 | ||
249 | DBG("Sending register done command to %d", sock); | |
250 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
251 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
252 | lum.cmd = LTTNG_UST_ABI_REGISTER_DONE; | |
1c5e467e MD |
253 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
254 | if (ret) | |
255 | return ret; | |
1c5e467e | 256 | return 0; |
1c5e467e MD |
257 | } |
258 | ||
57773204 MD |
259 | /* |
260 | * returns session handle. | |
261 | */ | |
249cffb5 | 262 | int lttng_ust_ctl_create_session(int sock) |
57773204 MD |
263 | { |
264 | struct ustcomm_ust_msg lum; | |
265 | struct ustcomm_ust_reply lur; | |
266 | int ret, session_handle; | |
267 | ||
268 | /* Create session */ | |
269 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
270 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
271 | lum.cmd = LTTNG_UST_ABI_SESSION; | |
57773204 MD |
272 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
273 | if (ret) | |
274 | return ret; | |
275 | session_handle = lur.ret_val; | |
276 | DBG("received session handle %u", session_handle); | |
277 | return session_handle; | |
278 | } | |
279 | ||
249cffb5 | 280 | int lttng_ust_ctl_create_event(int sock, struct lttng_ust_abi_event *ev, |
fd17d7ce MD |
281 | struct lttng_ust_abi_object_data *channel_data, |
282 | struct lttng_ust_abi_object_data **_event_data) | |
57773204 MD |
283 | { |
284 | struct ustcomm_ust_msg lum; | |
285 | struct ustcomm_ust_reply lur; | |
fd17d7ce | 286 | struct lttng_ust_abi_object_data *event_data; |
57773204 MD |
287 | int ret; |
288 | ||
9bfc503d MD |
289 | if (!channel_data || !_event_data) |
290 | return -EINVAL; | |
291 | ||
74d81a6c | 292 | event_data = zmalloc(sizeof(*event_data)); |
57773204 MD |
293 | if (!event_data) |
294 | return -ENOMEM; | |
fd17d7ce | 295 | event_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT; |
57773204 MD |
296 | memset(&lum, 0, sizeof(lum)); |
297 | lum.handle = channel_data->handle; | |
fd17d7ce | 298 | lum.cmd = LTTNG_UST_ABI_EVENT; |
57773204 | 299 | strncpy(lum.u.event.name, ev->name, |
fd17d7ce | 300 | LTTNG_UST_ABI_SYM_NAME_LEN); |
57773204 | 301 | lum.u.event.instrumentation = ev->instrumentation; |
457a6b58 MD |
302 | lum.u.event.loglevel_type = ev->loglevel_type; |
303 | lum.u.event.loglevel = ev->loglevel; | |
57773204 MD |
304 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
305 | if (ret) { | |
306 | free(event_data); | |
307 | return ret; | |
308 | } | |
309 | event_data->handle = lur.ret_val; | |
310 | DBG("received event handle %u", event_data->handle); | |
311 | *_event_data = event_data; | |
312 | return 0; | |
313 | } | |
314 | ||
662d0590 MD |
315 | /* |
316 | * Protocol for LTTNG_UST_ABI_CONTEXT command: | |
317 | * | |
318 | * - send: struct ustcomm_ust_msg | |
319 | * - send: var len ctx_name | |
320 | * - receive: struct ustcomm_ust_reply | |
321 | * | |
322 | * TODO: At the next breaking protocol bump, we should indicate the total | |
323 | * command message length as part of a message header so that the protocol can | |
324 | * recover from invalid command errors. | |
325 | */ | |
249cffb5 | 326 | int lttng_ust_ctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
fd17d7ce MD |
327 | struct lttng_ust_abi_object_data *obj_data, |
328 | struct lttng_ust_abi_object_data **_context_data) | |
57773204 MD |
329 | { |
330 | struct ustcomm_ust_msg lum; | |
331 | struct ustcomm_ust_reply lur; | |
fd17d7ce | 332 | struct lttng_ust_abi_object_data *context_data = NULL; |
53f0df51 JG |
333 | char *buf = NULL; |
334 | size_t len; | |
57773204 MD |
335 | int ret; |
336 | ||
53f0df51 JG |
337 | if (!obj_data || !_context_data) { |
338 | ret = -EINVAL; | |
339 | goto end; | |
340 | } | |
9bfc503d | 341 | |
74d81a6c | 342 | context_data = zmalloc(sizeof(*context_data)); |
53f0df51 JG |
343 | if (!context_data) { |
344 | ret = -ENOMEM; | |
345 | goto end; | |
346 | } | |
fd17d7ce | 347 | context_data->type = LTTNG_UST_ABI_OBJECT_TYPE_CONTEXT; |
57773204 | 348 | memset(&lum, 0, sizeof(lum)); |
3039d8ed | 349 | lum.handle = obj_data->handle; |
fd17d7ce | 350 | lum.cmd = LTTNG_UST_ABI_CONTEXT; |
53f0df51 JG |
351 | |
352 | lum.u.context.ctx = ctx->ctx; | |
353 | switch (ctx->ctx) { | |
fd17d7ce | 354 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
53f0df51 JG |
355 | lum.u.context.u.perf_counter = ctx->u.perf_counter; |
356 | break; | |
fd17d7ce | 357 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
53f0df51 JG |
358 | { |
359 | size_t provider_name_len = strlen( | |
360 | ctx->u.app_ctx.provider_name) + 1; | |
361 | size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1; | |
362 | ||
363 | lum.u.context.u.app_ctx.provider_name_len = provider_name_len; | |
364 | lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len; | |
365 | ||
366 | len = provider_name_len + ctx_name_len; | |
367 | buf = zmalloc(len); | |
368 | if (!buf) { | |
369 | ret = -ENOMEM; | |
370 | goto end; | |
371 | } | |
372 | memcpy(buf, ctx->u.app_ctx.provider_name, | |
373 | provider_name_len); | |
374 | memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name, | |
375 | ctx_name_len); | |
376 | break; | |
377 | } | |
378 | default: | |
379 | break; | |
380 | } | |
381 | ret = ustcomm_send_app_msg(sock, &lum); | |
382 | if (ret) | |
383 | goto end; | |
384 | if (buf) { | |
385 | /* send var len ctx_name */ | |
386 | ret = ustcomm_send_unix_sock(sock, buf, len); | |
387 | if (ret < 0) { | |
388 | goto end; | |
389 | } | |
390 | if (ret != len) { | |
391 | ret = -EINVAL; | |
392 | goto end; | |
393 | } | |
394 | } | |
395 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
396 | if (ret < 0) { | |
5fb2fe06 MD |
397 | if (ret == -EINVAL) { |
398 | /* | |
399 | * Command unknown from remote end. The communication socket is | |
400 | * now out-of-sync and needs to be shutdown. | |
401 | */ | |
402 | (void) ustcomm_shutdown_unix_sock(sock); | |
403 | } | |
53f0df51 | 404 | goto end; |
57773204 | 405 | } |
32ce8569 MD |
406 | context_data->handle = -1; |
407 | DBG("Context created successfully"); | |
57773204 | 408 | *_context_data = context_data; |
53f0df51 JG |
409 | context_data = NULL; |
410 | end: | |
411 | free(context_data); | |
412 | free(buf); | |
57773204 MD |
413 | return ret; |
414 | } | |
415 | ||
662d0590 MD |
416 | /* |
417 | * Protocol for LTTNG_UST_ABI_FILTER command: | |
418 | * | |
419 | * - send: struct ustcomm_ust_msg | |
420 | * - send: var len bytecode | |
421 | * - receive: struct ustcomm_ust_reply | |
422 | * | |
423 | * TODO: At the next breaking protocol bump, we should indicate the total | |
424 | * command message length as part of a message header so that the protocol can | |
425 | * recover from invalid command errors. | |
426 | */ | |
249cffb5 | 427 | int lttng_ust_ctl_set_filter(int sock, struct lttng_ust_abi_filter_bytecode *bytecode, |
fd17d7ce | 428 | struct lttng_ust_abi_object_data *obj_data) |
cd54f6d9 MD |
429 | { |
430 | struct ustcomm_ust_msg lum; | |
431 | struct ustcomm_ust_reply lur; | |
432 | int ret; | |
433 | ||
434 | if (!obj_data) | |
435 | return -EINVAL; | |
436 | ||
437 | memset(&lum, 0, sizeof(lum)); | |
438 | lum.handle = obj_data->handle; | |
fd17d7ce | 439 | lum.cmd = LTTNG_UST_ABI_FILTER; |
cd54f6d9 MD |
440 | lum.u.filter.data_size = bytecode->len; |
441 | lum.u.filter.reloc_offset = bytecode->reloc_offset; | |
e695af51 | 442 | lum.u.filter.seqnum = bytecode->seqnum; |
cd54f6d9 MD |
443 | |
444 | ret = ustcomm_send_app_msg(sock, &lum); | |
d37ecb3f FD |
445 | if (ret) |
446 | return ret; | |
447 | /* send var len bytecode */ | |
448 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
449 | bytecode->len); | |
450 | if (ret < 0) { | |
451 | return ret; | |
452 | } | |
453 | if (ret != bytecode->len) | |
454 | return -EINVAL; | |
662d0590 MD |
455 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
456 | if (ret == -EINVAL) { | |
457 | /* | |
458 | * Command unknown from remote end. The communication socket is | |
459 | * now out-of-sync and needs to be shutdown. | |
460 | */ | |
461 | (void) ustcomm_shutdown_unix_sock(sock); | |
462 | } | |
463 | return ret; | |
d37ecb3f FD |
464 | } |
465 | ||
662d0590 MD |
466 | /* |
467 | * Protocol for LTTNG_UST_ABI_CAPTURE command: | |
468 | * | |
469 | * - send: struct ustcomm_ust_msg | |
470 | * - receive: struct ustcomm_ust_reply | |
471 | * - send: var len bytecode | |
472 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
473 | */ | |
249cffb5 | 474 | int lttng_ust_ctl_set_capture(int sock, struct lttng_ust_abi_capture_bytecode *bytecode, |
fd17d7ce | 475 | struct lttng_ust_abi_object_data *obj_data) |
d37ecb3f FD |
476 | { |
477 | struct ustcomm_ust_msg lum; | |
478 | struct ustcomm_ust_reply lur; | |
479 | int ret; | |
480 | ||
481 | if (!obj_data) | |
482 | return -EINVAL; | |
483 | ||
484 | memset(&lum, 0, sizeof(lum)); | |
485 | lum.handle = obj_data->handle; | |
fd17d7ce | 486 | lum.cmd = LTTNG_UST_ABI_CAPTURE; |
d37ecb3f FD |
487 | lum.u.capture.data_size = bytecode->len; |
488 | lum.u.capture.reloc_offset = bytecode->reloc_offset; | |
489 | lum.u.capture.seqnum = bytecode->seqnum; | |
490 | ||
662d0590 | 491 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
cd54f6d9 MD |
492 | if (ret) |
493 | return ret; | |
cd54f6d9 MD |
494 | /* send var len bytecode */ |
495 | ret = ustcomm_send_unix_sock(sock, bytecode->data, | |
496 | bytecode->len); | |
497 | if (ret < 0) { | |
498 | return ret; | |
499 | } | |
7bc53e94 MD |
500 | if (ret != bytecode->len) |
501 | return -EINVAL; | |
502 | return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
cd54f6d9 MD |
503 | } |
504 | ||
662d0590 MD |
505 | /* |
506 | * Protocol for LTTNG_UST_ABI_EXCLUSION command: | |
507 | * | |
508 | * - send: struct ustcomm_ust_msg | |
509 | * - send: var len exclusion names | |
510 | * - receive: struct ustcomm_ust_reply | |
511 | * | |
512 | * TODO: At the next breaking protocol bump, we should indicate the total | |
513 | * command message length as part of a message header so that the protocol can | |
514 | * recover from invalid command errors. | |
515 | */ | |
249cffb5 | 516 | int lttng_ust_ctl_set_exclusion(int sock, struct lttng_ust_abi_event_exclusion *exclusion, |
fd17d7ce | 517 | struct lttng_ust_abi_object_data *obj_data) |
da57c034 JI |
518 | { |
519 | struct ustcomm_ust_msg lum; | |
520 | struct ustcomm_ust_reply lur; | |
521 | int ret; | |
522 | ||
523 | if (!obj_data) { | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | memset(&lum, 0, sizeof(lum)); | |
528 | lum.handle = obj_data->handle; | |
fd17d7ce | 529 | lum.cmd = LTTNG_UST_ABI_EXCLUSION; |
da57c034 JI |
530 | lum.u.exclusion.count = exclusion->count; |
531 | ||
532 | ret = ustcomm_send_app_msg(sock, &lum); | |
533 | if (ret) { | |
534 | return ret; | |
535 | } | |
536 | ||
1628366f | 537 | /* send var len exclusion names */ |
da57c034 JI |
538 | ret = ustcomm_send_unix_sock(sock, |
539 | exclusion->names, | |
fd17d7ce | 540 | exclusion->count * LTTNG_UST_ABI_SYM_NAME_LEN); |
da57c034 JI |
541 | if (ret < 0) { |
542 | return ret; | |
543 | } | |
fd17d7ce | 544 | if (ret != exclusion->count * LTTNG_UST_ABI_SYM_NAME_LEN) { |
da57c034 JI |
545 | return -EINVAL; |
546 | } | |
662d0590 MD |
547 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
548 | if (ret == -EINVAL) { | |
549 | /* | |
550 | * Command unknown from remote end. The communication socket is | |
551 | * now out-of-sync and needs to be shutdown. | |
552 | */ | |
553 | (void) ustcomm_shutdown_unix_sock(sock); | |
554 | } | |
555 | return ret; | |
da57c034 JI |
556 | } |
557 | ||
57773204 | 558 | /* Enable event, channel and session ioctl */ |
249cffb5 | 559 | int lttng_ust_ctl_enable(int sock, struct lttng_ust_abi_object_data *object) |
57773204 MD |
560 | { |
561 | struct ustcomm_ust_msg lum; | |
562 | struct ustcomm_ust_reply lur; | |
563 | int ret; | |
564 | ||
9bfc503d MD |
565 | if (!object) |
566 | return -EINVAL; | |
567 | ||
57773204 MD |
568 | memset(&lum, 0, sizeof(lum)); |
569 | lum.handle = object->handle; | |
fd17d7ce | 570 | lum.cmd = LTTNG_UST_ABI_ENABLE; |
57773204 MD |
571 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
572 | if (ret) | |
573 | return ret; | |
574 | DBG("enabled handle %u", object->handle); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | /* Disable event, channel and session ioctl */ | |
249cffb5 | 579 | int lttng_ust_ctl_disable(int sock, struct lttng_ust_abi_object_data *object) |
57773204 MD |
580 | { |
581 | struct ustcomm_ust_msg lum; | |
582 | struct ustcomm_ust_reply lur; | |
583 | int ret; | |
584 | ||
9bfc503d MD |
585 | if (!object) |
586 | return -EINVAL; | |
587 | ||
57773204 MD |
588 | memset(&lum, 0, sizeof(lum)); |
589 | lum.handle = object->handle; | |
fd17d7ce | 590 | lum.cmd = LTTNG_UST_ABI_DISABLE; |
57773204 MD |
591 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
592 | if (ret) | |
593 | return ret; | |
594 | DBG("disable handle %u", object->handle); | |
595 | return 0; | |
596 | } | |
597 | ||
249cffb5 | 598 | int lttng_ust_ctl_start_session(int sock, int handle) |
57773204 | 599 | { |
fd17d7ce | 600 | struct lttng_ust_abi_object_data obj; |
4a6ca058 MD |
601 | |
602 | obj.handle = handle; | |
249cffb5 | 603 | return lttng_ust_ctl_enable(sock, &obj); |
57773204 MD |
604 | } |
605 | ||
249cffb5 | 606 | int lttng_ust_ctl_stop_session(int sock, int handle) |
57773204 | 607 | { |
fd17d7ce | 608 | struct lttng_ust_abi_object_data obj; |
4a6ca058 MD |
609 | |
610 | obj.handle = handle; | |
249cffb5 | 611 | return lttng_ust_ctl_disable(sock, &obj); |
57773204 MD |
612 | } |
613 | ||
662d0590 MD |
614 | /* |
615 | * Protocol for LTTNG_UST_ABI_EVENT_NOTIFIER_GROUP_CREATE command: | |
616 | * | |
617 | * - send: struct ustcomm_ust_msg | |
618 | * - receive: struct ustcomm_ust_reply | |
619 | * - send: file descriptor | |
620 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
621 | */ | |
249cffb5 | 622 | int lttng_ust_ctl_create_event_notifier_group(int sock, int pipe_fd, |
fd17d7ce | 623 | struct lttng_ust_abi_object_data **_event_notifier_group_data) |
d8d2416d | 624 | { |
fd17d7ce | 625 | struct lttng_ust_abi_object_data *event_notifier_group_data; |
d8d2416d FD |
626 | struct ustcomm_ust_msg lum; |
627 | struct ustcomm_ust_reply lur; | |
628 | ssize_t len; | |
629 | int ret; | |
630 | ||
631 | if (!_event_notifier_group_data) | |
632 | return -EINVAL; | |
633 | ||
634 | event_notifier_group_data = zmalloc(sizeof(*event_notifier_group_data)); | |
635 | if (!event_notifier_group_data) | |
636 | return -ENOMEM; | |
637 | ||
fd17d7ce | 638 | event_notifier_group_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER_GROUP; |
d8d2416d FD |
639 | |
640 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
641 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
642 | lum.cmd = LTTNG_UST_ABI_EVENT_NOTIFIER_GROUP_CREATE; | |
d8d2416d | 643 | |
662d0590 | 644 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
d8d2416d FD |
645 | if (ret) |
646 | goto error; | |
647 | ||
648 | /* Send event_notifier notification pipe. */ | |
649 | len = ustcomm_send_fds_unix_sock(sock, &pipe_fd, 1); | |
650 | if (len <= 0) { | |
651 | ret = len; | |
652 | goto error; | |
653 | } | |
654 | ||
655 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
656 | if (ret) | |
657 | goto error; | |
658 | ||
659 | event_notifier_group_data->handle = lur.ret_val; | |
660 | DBG("received event_notifier group handle %d", event_notifier_group_data->handle); | |
661 | ||
662 | *_event_notifier_group_data = event_notifier_group_data; | |
663 | ||
664 | ret = 0; | |
665 | goto end; | |
666 | error: | |
667 | free(event_notifier_group_data); | |
668 | ||
669 | end: | |
670 | return ret; | |
671 | } | |
672 | ||
662d0590 MD |
673 | /* |
674 | * Protocol for LTTNG_UST_ABI_EVENT_NOTIFIER_CREATE command: | |
675 | * | |
676 | * - send: struct ustcomm_ust_msg | |
677 | * - receive: struct ustcomm_ust_reply | |
678 | * - send: struct lttng_ust_abi_event_notifier | |
679 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
680 | */ | |
249cffb5 | 681 | int lttng_ust_ctl_create_event_notifier(int sock, struct lttng_ust_abi_event_notifier *event_notifier, |
fd17d7ce MD |
682 | struct lttng_ust_abi_object_data *event_notifier_group, |
683 | struct lttng_ust_abi_object_data **_event_notifier_data) | |
d8d2416d FD |
684 | { |
685 | struct ustcomm_ust_msg lum; | |
686 | struct ustcomm_ust_reply lur; | |
fd17d7ce | 687 | struct lttng_ust_abi_object_data *event_notifier_data; |
8406222c | 688 | ssize_t len; |
d8d2416d FD |
689 | int ret; |
690 | ||
691 | if (!event_notifier_group || !_event_notifier_data) | |
692 | return -EINVAL; | |
693 | ||
694 | event_notifier_data = zmalloc(sizeof(*event_notifier_data)); | |
695 | if (!event_notifier_data) | |
696 | return -ENOMEM; | |
697 | ||
fd17d7ce | 698 | event_notifier_data->type = LTTNG_UST_ABI_OBJECT_TYPE_EVENT_NOTIFIER; |
d8d2416d FD |
699 | |
700 | memset(&lum, 0, sizeof(lum)); | |
701 | lum.handle = event_notifier_group->handle; | |
fd17d7ce | 702 | lum.cmd = LTTNG_UST_ABI_EVENT_NOTIFIER_CREATE; |
8406222c | 703 | lum.u.event_notifier.len = sizeof(*event_notifier); |
d8d2416d | 704 | |
662d0590 | 705 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
d8d2416d FD |
706 | if (ret) { |
707 | free(event_notifier_data); | |
708 | return ret; | |
709 | } | |
31624f6c | 710 | /* Send struct lttng_ust_abi_event_notifier */ |
8406222c MD |
711 | len = ustcomm_send_unix_sock(sock, event_notifier, sizeof(*event_notifier)); |
712 | if (len != sizeof(*event_notifier)) { | |
4c4f4917 | 713 | free(event_notifier_data); |
8406222c MD |
714 | if (len < 0) |
715 | return len; | |
716 | else | |
717 | return -EIO; | |
718 | } | |
41844673 MD |
719 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
720 | if (ret) { | |
721 | free(event_notifier_data); | |
722 | return ret; | |
723 | } | |
d8d2416d FD |
724 | event_notifier_data->handle = lur.ret_val; |
725 | DBG("received event_notifier handle %u", event_notifier_data->handle); | |
726 | *_event_notifier_data = event_notifier_data; | |
727 | ||
728 | return ret; | |
729 | } | |
730 | ||
249cffb5 | 731 | int lttng_ust_ctl_tracepoint_list(int sock) |
57773204 | 732 | { |
b115631f MD |
733 | struct ustcomm_ust_msg lum; |
734 | struct ustcomm_ust_reply lur; | |
735 | int ret, tp_list_handle; | |
736 | ||
737 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
738 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
739 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_LIST; | |
b115631f MD |
740 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
741 | if (ret) | |
742 | return ret; | |
743 | tp_list_handle = lur.ret_val; | |
744 | DBG("received tracepoint list handle %u", tp_list_handle); | |
745 | return tp_list_handle; | |
746 | } | |
747 | ||
249cffb5 | 748 | int lttng_ust_ctl_tracepoint_list_get(int sock, int tp_list_handle, |
fd17d7ce | 749 | struct lttng_ust_abi_tracepoint_iter *iter) |
b115631f MD |
750 | { |
751 | struct ustcomm_ust_msg lum; | |
752 | struct ustcomm_ust_reply lur; | |
753 | int ret; | |
754 | ||
9bfc503d MD |
755 | if (!iter) |
756 | return -EINVAL; | |
757 | ||
b115631f MD |
758 | memset(&lum, 0, sizeof(lum)); |
759 | lum.handle = tp_list_handle; | |
fd17d7ce | 760 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_LIST_GET; |
b115631f MD |
761 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
762 | if (ret) | |
763 | return ret; | |
882a56d7 | 764 | DBG("received tracepoint list entry name %s loglevel %d", |
cbef6901 | 765 | lur.u.tracepoint.name, |
882a56d7 | 766 | lur.u.tracepoint.loglevel); |
cbef6901 | 767 | memcpy(iter, &lur.u.tracepoint, sizeof(*iter)); |
b115631f | 768 | return 0; |
57773204 MD |
769 | } |
770 | ||
249cffb5 | 771 | int lttng_ust_ctl_tracepoint_field_list(int sock) |
40003310 MD |
772 | { |
773 | struct ustcomm_ust_msg lum; | |
774 | struct ustcomm_ust_reply lur; | |
775 | int ret, tp_field_list_handle; | |
776 | ||
777 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
778 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
779 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST; | |
40003310 MD |
780 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
781 | if (ret) | |
782 | return ret; | |
783 | tp_field_list_handle = lur.ret_val; | |
784 | DBG("received tracepoint field list handle %u", tp_field_list_handle); | |
785 | return tp_field_list_handle; | |
786 | } | |
787 | ||
249cffb5 | 788 | int lttng_ust_ctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, |
fd17d7ce | 789 | struct lttng_ust_abi_field_iter *iter) |
40003310 MD |
790 | { |
791 | struct ustcomm_ust_msg lum; | |
792 | struct ustcomm_ust_reply lur; | |
793 | int ret; | |
794 | ssize_t len; | |
795 | ||
796 | if (!iter) | |
797 | return -EINVAL; | |
798 | ||
799 | memset(&lum, 0, sizeof(lum)); | |
800 | lum.handle = tp_field_list_handle; | |
fd17d7ce | 801 | lum.cmd = LTTNG_UST_ABI_TRACEPOINT_FIELD_LIST_GET; |
40003310 MD |
802 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
803 | if (ret) | |
804 | return ret; | |
805 | len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter)); | |
806 | if (len != sizeof(*iter)) { | |
807 | return -EINVAL; | |
808 | } | |
809 | DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d", | |
810 | iter->event_name, | |
811 | iter->loglevel, | |
812 | iter->field_name, | |
813 | iter->type); | |
814 | return 0; | |
815 | } | |
816 | ||
249cffb5 | 817 | int lttng_ust_ctl_tracer_version(int sock, struct lttng_ust_abi_tracer_version *v) |
57773204 MD |
818 | { |
819 | struct ustcomm_ust_msg lum; | |
820 | struct ustcomm_ust_reply lur; | |
821 | int ret; | |
822 | ||
9bfc503d MD |
823 | if (!v) |
824 | return -EINVAL; | |
825 | ||
57773204 | 826 | memset(&lum, 0, sizeof(lum)); |
fd17d7ce MD |
827 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
828 | lum.cmd = LTTNG_UST_ABI_TRACER_VERSION; | |
57773204 MD |
829 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
830 | if (ret) | |
831 | return ret; | |
832 | memcpy(v, &lur.u.version, sizeof(*v)); | |
833 | DBG("received tracer version"); | |
834 | return 0; | |
835 | } | |
836 | ||
249cffb5 | 837 | int lttng_ust_ctl_wait_quiescent(int sock) |
57773204 MD |
838 | { |
839 | struct ustcomm_ust_msg lum; | |
840 | struct ustcomm_ust_reply lur; | |
841 | int ret; | |
842 | ||
843 | memset(&lum, 0, sizeof(lum)); | |
fd17d7ce MD |
844 | lum.handle = LTTNG_UST_ABI_ROOT_HANDLE; |
845 | lum.cmd = LTTNG_UST_ABI_WAIT_QUIESCENT; | |
57773204 MD |
846 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
847 | if (ret) | |
848 | return ret; | |
849 | DBG("waited for quiescent state"); | |
850 | return 0; | |
851 | } | |
852 | ||
249cffb5 | 853 | int lttng_ust_ctl_calibrate(int sock __attribute__((unused)), |
2208d8b5 | 854 | struct lttng_ust_abi_calibrate *calibrate) |
57773204 | 855 | { |
9bfc503d MD |
856 | if (!calibrate) |
857 | return -EINVAL; | |
858 | ||
57773204 MD |
859 | return -ENOSYS; |
860 | } | |
861 | ||
249cffb5 | 862 | int lttng_ust_ctl_sock_flush_buffer(int sock, struct lttng_ust_abi_object_data *object) |
f1fffc57 MD |
863 | { |
864 | struct ustcomm_ust_msg lum; | |
865 | struct ustcomm_ust_reply lur; | |
866 | int ret; | |
867 | ||
9bfc503d MD |
868 | if (!object) |
869 | return -EINVAL; | |
870 | ||
f1fffc57 MD |
871 | memset(&lum, 0, sizeof(lum)); |
872 | lum.handle = object->handle; | |
fd17d7ce | 873 | lum.cmd = LTTNG_UST_ABI_FLUSH_BUFFER; |
f1fffc57 MD |
874 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
875 | if (ret) | |
876 | return ret; | |
877 | DBG("flushed buffer handle %u", object->handle); | |
878 | return 0; | |
879 | } | |
880 | ||
74d81a6c | 881 | static |
249cffb5 | 882 | int lttng_ust_ctl_send_channel(int sock, |
fd17d7ce | 883 | enum lttng_ust_abi_chan_type type, |
74d81a6c MD |
884 | void *data, |
885 | uint64_t size, | |
ff0f5728 | 886 | int wakeup_fd, |
74d81a6c MD |
887 | int send_fd_only) |
888 | { | |
889 | ssize_t len; | |
890 | ||
891 | if (!send_fd_only) { | |
892 | /* Send mmap size */ | |
893 | len = ustcomm_send_unix_sock(sock, &size, sizeof(size)); | |
894 | if (len != sizeof(size)) { | |
895 | if (len < 0) | |
896 | return len; | |
897 | else | |
898 | return -EIO; | |
899 | } | |
900 | ||
901 | /* Send channel type */ | |
902 | len = ustcomm_send_unix_sock(sock, &type, sizeof(type)); | |
903 | if (len != sizeof(type)) { | |
904 | if (len < 0) | |
905 | return len; | |
906 | else | |
907 | return -EIO; | |
908 | } | |
909 | } | |
910 | ||
911 | /* Send channel data */ | |
912 | len = ustcomm_send_unix_sock(sock, data, size); | |
913 | if (len != size) { | |
914 | if (len < 0) | |
915 | return len; | |
916 | else | |
917 | return -EIO; | |
918 | } | |
57773204 | 919 | |
ff0f5728 MD |
920 | /* Send wakeup fd */ |
921 | len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1); | |
922 | if (len <= 0) { | |
923 | if (len < 0) | |
924 | return len; | |
925 | else | |
926 | return -EIO; | |
927 | } | |
74d81a6c MD |
928 | return 0; |
929 | } | |
930 | ||
931 | static | |
249cffb5 | 932 | int lttng_ust_ctl_send_stream(int sock, |
74d81a6c MD |
933 | uint32_t stream_nr, |
934 | uint64_t memory_map_size, | |
935 | int shm_fd, int wakeup_fd, | |
936 | int send_fd_only) | |
57773204 | 937 | { |
74d81a6c MD |
938 | ssize_t len; |
939 | int fds[2]; | |
940 | ||
941 | if (!send_fd_only) { | |
942 | if (shm_fd < 0) { | |
943 | /* finish iteration */ | |
944 | uint64_t v = -1; | |
945 | ||
946 | len = ustcomm_send_unix_sock(sock, &v, sizeof(v)); | |
947 | if (len != sizeof(v)) { | |
948 | if (len < 0) | |
949 | return len; | |
950 | else | |
951 | return -EIO; | |
952 | } | |
953 | return 0; | |
954 | } | |
955 | ||
956 | /* Send mmap size */ | |
957 | len = ustcomm_send_unix_sock(sock, &memory_map_size, | |
958 | sizeof(memory_map_size)); | |
959 | if (len != sizeof(memory_map_size)) { | |
960 | if (len < 0) | |
961 | return len; | |
962 | else | |
963 | return -EIO; | |
964 | } | |
965 | ||
966 | /* Send stream nr */ | |
967 | len = ustcomm_send_unix_sock(sock, &stream_nr, | |
968 | sizeof(stream_nr)); | |
969 | if (len != sizeof(stream_nr)) { | |
970 | if (len < 0) | |
971 | return len; | |
972 | else | |
973 | return -EIO; | |
974 | } | |
975 | } | |
976 | ||
977 | /* Send shm fd and wakeup fd */ | |
978 | fds[0] = shm_fd; | |
979 | fds[1] = wakeup_fd; | |
980 | len = ustcomm_send_fds_unix_sock(sock, fds, 2); | |
981 | if (len <= 0) { | |
982 | if (len < 0) | |
983 | return len; | |
984 | else | |
985 | return -EIO; | |
986 | } | |
987 | return 0; | |
988 | } | |
989 | ||
249cffb5 | 990 | int lttng_ust_ctl_recv_channel_from_consumer(int sock, |
fd17d7ce | 991 | struct lttng_ust_abi_object_data **_channel_data) |
74d81a6c | 992 | { |
fd17d7ce | 993 | struct lttng_ust_abi_object_data *channel_data; |
74d81a6c | 994 | ssize_t len; |
ff0f5728 | 995 | int wakeup_fd; |
7a784989 | 996 | int ret; |
57773204 | 997 | |
74d81a6c MD |
998 | channel_data = zmalloc(sizeof(*channel_data)); |
999 | if (!channel_data) { | |
1000 | ret = -ENOMEM; | |
1001 | goto error_alloc; | |
1002 | } | |
fd17d7ce | 1003 | channel_data->type = LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL; |
12f3dabc | 1004 | channel_data->handle = -1; |
74d81a6c MD |
1005 | |
1006 | /* recv mmap size */ | |
1007 | len = ustcomm_recv_unix_sock(sock, &channel_data->size, | |
1008 | sizeof(channel_data->size)); | |
1009 | if (len != sizeof(channel_data->size)) { | |
1010 | if (len < 0) | |
1011 | ret = len; | |
1012 | else | |
1013 | ret = -EINVAL; | |
1014 | goto error; | |
1015 | } | |
9bfc503d | 1016 | |
74d81a6c MD |
1017 | /* recv channel type */ |
1018 | len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type, | |
1019 | sizeof(channel_data->u.channel.type)); | |
1020 | if (len != sizeof(channel_data->u.channel.type)) { | |
1021 | if (len < 0) | |
1022 | ret = len; | |
1023 | else | |
1024 | ret = -EINVAL; | |
1025 | goto error; | |
1026 | } | |
1027 | ||
1028 | /* recv channel data */ | |
1029 | channel_data->u.channel.data = zmalloc(channel_data->size); | |
1030 | if (!channel_data->u.channel.data) { | |
1031 | ret = -ENOMEM; | |
1032 | goto error; | |
1033 | } | |
1034 | len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data, | |
1035 | channel_data->size); | |
1036 | if (len != channel_data->size) { | |
1037 | if (len < 0) | |
1038 | ret = len; | |
1039 | else | |
1040 | ret = -EINVAL; | |
1041 | goto error_recv_data; | |
1042 | } | |
ff0f5728 MD |
1043 | /* recv wakeup fd */ |
1044 | len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); | |
1045 | if (len <= 0) { | |
1046 | if (len < 0) { | |
1047 | ret = len; | |
1048 | goto error_recv_data; | |
1049 | } else { | |
1050 | ret = -EIO; | |
1051 | goto error_recv_data; | |
1052 | } | |
1053 | } | |
1054 | channel_data->u.channel.wakeup_fd = wakeup_fd; | |
74d81a6c MD |
1055 | *_channel_data = channel_data; |
1056 | return 0; | |
1057 | ||
1058 | error_recv_data: | |
1059 | free(channel_data->u.channel.data); | |
1060 | error: | |
1061 | free(channel_data); | |
1062 | error_alloc: | |
1063 | return ret; | |
1064 | } | |
1065 | ||
249cffb5 | 1066 | int lttng_ust_ctl_recv_stream_from_consumer(int sock, |
fd17d7ce | 1067 | struct lttng_ust_abi_object_data **_stream_data) |
74d81a6c | 1068 | { |
fd17d7ce | 1069 | struct lttng_ust_abi_object_data *stream_data; |
74d81a6c MD |
1070 | ssize_t len; |
1071 | int ret; | |
1072 | int fds[2]; | |
1073 | ||
1074 | stream_data = zmalloc(sizeof(*stream_data)); | |
1075 | if (!stream_data) { | |
1076 | ret = -ENOMEM; | |
1077 | goto error_alloc; | |
57773204 | 1078 | } |
74d81a6c | 1079 | |
fd17d7ce | 1080 | stream_data->type = LTTNG_UST_ABI_OBJECT_TYPE_STREAM; |
74d81a6c MD |
1081 | stream_data->handle = -1; |
1082 | ||
1083 | /* recv mmap size */ | |
1084 | len = ustcomm_recv_unix_sock(sock, &stream_data->size, | |
1085 | sizeof(stream_data->size)); | |
1086 | if (len != sizeof(stream_data->size)) { | |
1087 | if (len < 0) | |
1088 | ret = len; | |
1089 | else | |
1090 | ret = -EINVAL; | |
1091 | goto error; | |
1092 | } | |
1093 | if (stream_data->size == -1) { | |
1094 | ret = -LTTNG_UST_ERR_NOENT; | |
1095 | goto error; | |
1096 | } | |
1097 | ||
1098 | /* recv stream nr */ | |
1099 | len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr, | |
1100 | sizeof(stream_data->u.stream.stream_nr)); | |
1101 | if (len != sizeof(stream_data->u.stream.stream_nr)) { | |
1102 | if (len < 0) | |
1103 | ret = len; | |
1104 | else | |
1105 | ret = -EINVAL; | |
1106 | goto error; | |
1107 | } | |
1108 | ||
1109 | /* recv shm fd and wakeup fd */ | |
1110 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); | |
1111 | if (len <= 0) { | |
1112 | if (len < 0) { | |
1113 | ret = len; | |
1114 | goto error; | |
1115 | } else { | |
1116 | ret = -EIO; | |
1117 | goto error; | |
0bfe09ec | 1118 | } |
0bfe09ec | 1119 | } |
74d81a6c MD |
1120 | stream_data->u.stream.shm_fd = fds[0]; |
1121 | stream_data->u.stream.wakeup_fd = fds[1]; | |
1122 | *_stream_data = stream_data; | |
1123 | return 0; | |
0bfe09ec | 1124 | |
74d81a6c MD |
1125 | error: |
1126 | free(stream_data); | |
1127 | error_alloc: | |
1128 | return ret; | |
1129 | } | |
1130 | ||
662d0590 MD |
1131 | /* |
1132 | * Protocol for LTTNG_UST_ABI_CHANNEL command: | |
1133 | * | |
1134 | * - send: struct ustcomm_ust_msg | |
1135 | * - send: file descriptors and channel data | |
1136 | * - receive: struct ustcomm_ust_reply | |
1137 | * | |
1138 | * TODO: At the next breaking protocol bump, we should indicate the total | |
1139 | * command message length as part of a message header so that the protocol can | |
1140 | * recover from invalid command errors. | |
1141 | */ | |
249cffb5 | 1142 | int lttng_ust_ctl_send_channel_to_ust(int sock, int session_handle, |
fd17d7ce | 1143 | struct lttng_ust_abi_object_data *channel_data) |
74d81a6c MD |
1144 | { |
1145 | struct ustcomm_ust_msg lum; | |
1146 | struct ustcomm_ust_reply lur; | |
1147 | int ret; | |
1148 | ||
1149 | if (!channel_data) | |
1150 | return -EINVAL; | |
1151 | ||
1152 | memset(&lum, 0, sizeof(lum)); | |
1153 | lum.handle = session_handle; | |
fd17d7ce | 1154 | lum.cmd = LTTNG_UST_ABI_CHANNEL; |
74d81a6c MD |
1155 | lum.u.channel.len = channel_data->size; |
1156 | lum.u.channel.type = channel_data->u.channel.type; | |
1157 | ret = ustcomm_send_app_msg(sock, &lum); | |
1158 | if (ret) | |
1159 | return ret; | |
1160 | ||
249cffb5 | 1161 | ret = lttng_ust_ctl_send_channel(sock, |
74d81a6c MD |
1162 | channel_data->u.channel.type, |
1163 | channel_data->u.channel.data, | |
1164 | channel_data->size, | |
ff0f5728 | 1165 | channel_data->u.channel.wakeup_fd, |
74d81a6c MD |
1166 | 1); |
1167 | if (ret) | |
1168 | return ret; | |
1169 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
1170 | if (!ret) { | |
7f2348b8 | 1171 | channel_data->handle = lur.ret_val; |
662d0590 MD |
1172 | } else if (ret == -EINVAL) { |
1173 | /* | |
1174 | * Command unknown from remote end. The communication socket is | |
1175 | * now out-of-sync and needs to be shutdown. | |
1176 | */ | |
1177 | (void) ustcomm_shutdown_unix_sock(sock); | |
57773204 | 1178 | } |
74d81a6c MD |
1179 | return ret; |
1180 | } | |
1181 | ||
662d0590 MD |
1182 | /* |
1183 | * Protocol for LTTNG_UST_ABI_STREAM command: | |
1184 | * | |
1185 | * - send: struct ustcomm_ust_msg | |
1186 | * - send: file descriptors and stream data | |
1187 | * - receive: struct ustcomm_ust_reply | |
1188 | * | |
1189 | * TODO: At the next breaking protocol bump, we should indicate the total | |
1190 | * command message length as part of a message header so that the protocol can | |
1191 | * recover from invalid command errors. | |
1192 | */ | |
249cffb5 | 1193 | int lttng_ust_ctl_send_stream_to_ust(int sock, |
fd17d7ce MD |
1194 | struct lttng_ust_abi_object_data *channel_data, |
1195 | struct lttng_ust_abi_object_data *stream_data) | |
74d81a6c MD |
1196 | { |
1197 | struct ustcomm_ust_msg lum; | |
1198 | struct ustcomm_ust_reply lur; | |
1199 | int ret; | |
1200 | ||
1201 | memset(&lum, 0, sizeof(lum)); | |
1202 | lum.handle = channel_data->handle; | |
fd17d7ce | 1203 | lum.cmd = LTTNG_UST_ABI_STREAM; |
74d81a6c MD |
1204 | lum.u.stream.len = stream_data->size; |
1205 | lum.u.stream.stream_nr = stream_data->u.stream.stream_nr; | |
1206 | ret = ustcomm_send_app_msg(sock, &lum); | |
1207 | if (ret) | |
1208 | return ret; | |
1209 | ||
1210 | assert(stream_data); | |
fd17d7ce | 1211 | assert(stream_data->type == LTTNG_UST_ABI_OBJECT_TYPE_STREAM); |
74d81a6c | 1212 | |
249cffb5 | 1213 | ret = lttng_ust_ctl_send_stream(sock, |
74d81a6c MD |
1214 | stream_data->u.stream.stream_nr, |
1215 | stream_data->size, | |
1216 | stream_data->u.stream.shm_fd, | |
1217 | stream_data->u.stream.wakeup_fd, 1); | |
1218 | if (ret) | |
1219 | return ret; | |
662d0590 MD |
1220 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); |
1221 | if (ret == -EINVAL) { | |
1222 | /* | |
1223 | * Command unknown from remote end. The communication socket is | |
1224 | * now out-of-sync and needs to be shutdown. | |
1225 | */ | |
1226 | (void) ustcomm_shutdown_unix_sock(sock); | |
1227 | } | |
1228 | return ret; | |
74d81a6c MD |
1229 | } |
1230 | ||
249cffb5 | 1231 | int lttng_ust_ctl_duplicate_ust_object_data(struct lttng_ust_abi_object_data **dest, |
fd17d7ce | 1232 | struct lttng_ust_abi_object_data *src) |
12f3dabc | 1233 | { |
fd17d7ce | 1234 | struct lttng_ust_abi_object_data *obj; |
12f3dabc MD |
1235 | int ret; |
1236 | ||
1237 | if (src->handle != -1) { | |
1238 | ret = -EINVAL; | |
1239 | goto error; | |
1240 | } | |
1241 | ||
1242 | obj = zmalloc(sizeof(*obj)); | |
1243 | if (!obj) { | |
1244 | ret = -ENOMEM; | |
1245 | goto error; | |
1246 | } | |
1247 | ||
1248 | obj->type = src->type; | |
1249 | obj->handle = src->handle; | |
1250 | obj->size = src->size; | |
1251 | ||
1252 | switch (obj->type) { | |
fd17d7ce | 1253 | case LTTNG_UST_ABI_OBJECT_TYPE_CHANNEL: |
12f3dabc MD |
1254 | { |
1255 | obj->u.channel.type = src->u.channel.type; | |
1256 | if (src->u.channel.wakeup_fd >= 0) { | |
1257 | obj->u.channel.wakeup_fd = | |
1258 | dup(src->u.channel.wakeup_fd); | |
1259 | if (obj->u.channel.wakeup_fd < 0) { | |
d720c2d1 | 1260 | ret = -errno; |
12f3dabc MD |
1261 | goto chan_error_wakeup_fd; |
1262 | } | |
1263 | } else { | |
1264 | obj->u.channel.wakeup_fd = | |
1265 | src->u.channel.wakeup_fd; | |
1266 | } | |
1267 | obj->u.channel.data = zmalloc(obj->size); | |
1268 | if (!obj->u.channel.data) { | |
1269 | ret = -ENOMEM; | |
1270 | goto chan_error_alloc; | |
1271 | } | |
1272 | memcpy(obj->u.channel.data, src->u.channel.data, obj->size); | |
1273 | break; | |
1274 | ||
1275 | chan_error_alloc: | |
1276 | if (src->u.channel.wakeup_fd >= 0) { | |
1277 | int closeret; | |
1278 | ||
1279 | closeret = close(obj->u.channel.wakeup_fd); | |
1280 | if (closeret) { | |
1281 | PERROR("close"); | |
1282 | } | |
1283 | } | |
1284 | chan_error_wakeup_fd: | |
1285 | goto error_type; | |
1286 | ||
1287 | } | |
1288 | ||
fd17d7ce | 1289 | case LTTNG_UST_ABI_OBJECT_TYPE_STREAM: |
12f3dabc MD |
1290 | { |
1291 | obj->u.stream.stream_nr = src->u.stream.stream_nr; | |
1292 | if (src->u.stream.wakeup_fd >= 0) { | |
1293 | obj->u.stream.wakeup_fd = | |
1294 | dup(src->u.stream.wakeup_fd); | |
1295 | if (obj->u.stream.wakeup_fd < 0) { | |
d720c2d1 | 1296 | ret = -errno; |
12f3dabc MD |
1297 | goto stream_error_wakeup_fd; |
1298 | } | |
1299 | } else { | |
1300 | obj->u.stream.wakeup_fd = | |
1301 | src->u.stream.wakeup_fd; | |
1302 | } | |
1303 | ||
1304 | if (src->u.stream.shm_fd >= 0) { | |
1305 | obj->u.stream.shm_fd = | |
1306 | dup(src->u.stream.shm_fd); | |
1307 | if (obj->u.stream.shm_fd < 0) { | |
d720c2d1 | 1308 | ret = -errno; |
12f3dabc MD |
1309 | goto stream_error_shm_fd; |
1310 | } | |
1311 | } else { | |
1312 | obj->u.stream.shm_fd = | |
1313 | src->u.stream.shm_fd; | |
1314 | } | |
1315 | break; | |
1316 | ||
1317 | stream_error_shm_fd: | |
1318 | if (src->u.stream.wakeup_fd >= 0) { | |
1319 | int closeret; | |
1320 | ||
1321 | closeret = close(obj->u.stream.wakeup_fd); | |
1322 | if (closeret) { | |
1323 | PERROR("close"); | |
1324 | } | |
1325 | } | |
1326 | stream_error_wakeup_fd: | |
1327 | goto error_type; | |
1328 | } | |
1329 | ||
fd17d7ce | 1330 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER: |
ebabbf58 MD |
1331 | { |
1332 | obj->u.counter.data = zmalloc(obj->size); | |
1333 | if (!obj->u.counter.data) { | |
1334 | ret = -ENOMEM; | |
1335 | goto error_type; | |
1336 | } | |
1337 | memcpy(obj->u.counter.data, src->u.counter.data, obj->size); | |
1338 | break; | |
1339 | } | |
1340 | ||
fd17d7ce | 1341 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL: |
ebabbf58 MD |
1342 | { |
1343 | if (src->u.counter_global.shm_fd >= 0) { | |
1344 | obj->u.counter_global.shm_fd = | |
1345 | dup(src->u.counter_global.shm_fd); | |
1346 | if (obj->u.counter_global.shm_fd < 0) { | |
d720c2d1 | 1347 | ret = -errno; |
ebabbf58 MD |
1348 | goto error_type; |
1349 | } | |
1350 | } | |
1351 | break; | |
1352 | } | |
1353 | ||
fd17d7ce | 1354 | case LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU: |
ebabbf58 MD |
1355 | { |
1356 | obj->u.counter_cpu.cpu_nr = src->u.counter_cpu.cpu_nr; | |
1357 | if (src->u.counter_cpu.shm_fd >= 0) { | |
1358 | obj->u.counter_cpu.shm_fd = | |
1359 | dup(src->u.counter_cpu.shm_fd); | |
1360 | if (obj->u.counter_cpu.shm_fd < 0) { | |
d720c2d1 | 1361 | ret = -errno; |
ebabbf58 MD |
1362 | goto error_type; |
1363 | } | |
1364 | } | |
1365 | break; | |
1366 | } | |
1367 | ||
12f3dabc MD |
1368 | default: |
1369 | ret = -EINVAL; | |
1370 | goto error_type; | |
1371 | } | |
1372 | ||
1373 | *dest = obj; | |
1374 | return 0; | |
1375 | ||
1376 | error_type: | |
1377 | free(obj); | |
1378 | error: | |
1379 | return ret; | |
1380 | } | |
1381 | ||
74d81a6c MD |
1382 | |
1383 | /* Buffer operations */ | |
1384 | ||
249cffb5 | 1385 | int lttng_ust_ctl_get_nr_stream_per_channel(void) |
5ea386c3 MD |
1386 | { |
1387 | return num_possible_cpus(); | |
1388 | } | |
1389 | ||
249cffb5 MJ |
1390 | struct lttng_ust_ctl_consumer_channel * |
1391 | lttng_ust_ctl_create_channel(struct lttng_ust_ctl_consumer_channel_attr *attr, | |
5ea386c3 | 1392 | const int *stream_fds, int nr_stream_fds) |
74d81a6c | 1393 | { |
249cffb5 | 1394 | struct lttng_ust_ctl_consumer_channel *chan; |
74d81a6c MD |
1395 | const char *transport_name; |
1396 | struct lttng_transport *transport; | |
1397 | ||
1398 | switch (attr->type) { | |
fd17d7ce MD |
1399 | case LTTNG_UST_ABI_CHAN_PER_CPU: |
1400 | if (attr->output == LTTNG_UST_ABI_MMAP) { | |
34a91bdb MD |
1401 | if (attr->overwrite) { |
1402 | if (attr->read_timer_interval == 0) { | |
1403 | transport_name = "relay-overwrite-mmap"; | |
1404 | } else { | |
1405 | transport_name = "relay-overwrite-rt-mmap"; | |
1406 | } | |
1407 | } else { | |
1408 | if (attr->read_timer_interval == 0) { | |
1409 | transport_name = "relay-discard-mmap"; | |
1410 | } else { | |
1411 | transport_name = "relay-discard-rt-mmap"; | |
1412 | } | |
1413 | } | |
74d81a6c MD |
1414 | } else { |
1415 | return NULL; | |
1416 | } | |
c1fca457 | 1417 | break; |
fd17d7ce MD |
1418 | case LTTNG_UST_ABI_CHAN_METADATA: |
1419 | if (attr->output == LTTNG_UST_ABI_MMAP) | |
74d81a6c MD |
1420 | transport_name = "relay-metadata-mmap"; |
1421 | else | |
1422 | return NULL; | |
c1fca457 MD |
1423 | break; |
1424 | default: | |
74d81a6c | 1425 | transport_name = "<unknown>"; |
c1fca457 MD |
1426 | return NULL; |
1427 | } | |
74d81a6c | 1428 | |
65c48d6a | 1429 | transport = lttng_ust_transport_find(transport_name); |
74d81a6c MD |
1430 | if (!transport) { |
1431 | DBG("LTTng transport %s not found\n", | |
32ce8569 | 1432 | transport_name); |
74d81a6c | 1433 | return NULL; |
7a784989 | 1434 | } |
74d81a6c MD |
1435 | |
1436 | chan = zmalloc(sizeof(*chan)); | |
1437 | if (!chan) | |
1438 | return NULL; | |
1439 | ||
a880bae5 | 1440 | chan->chan = transport->ops.priv->channel_create(transport_name, NULL, |
32ce8569 | 1441 | attr->subbuf_size, attr->num_subbuf, |
74d81a6c | 1442 | attr->switch_timer_interval, |
32ce8569 | 1443 | attr->read_timer_interval, |
a9ff648c | 1444 | attr->uuid, attr->chan_id, |
b2c5f61a MD |
1445 | stream_fds, nr_stream_fds, |
1446 | attr->blocking_timeout); | |
74d81a6c MD |
1447 | if (!chan->chan) { |
1448 | goto chan_error; | |
1449 | } | |
1450 | chan->chan->ops = &transport->ops; | |
1451 | memcpy(&chan->attr, attr, sizeof(chan->attr)); | |
249cffb5 MJ |
1452 | chan->wait_fd = lttng_ust_ctl_channel_get_wait_fd(chan); |
1453 | chan->wakeup_fd = lttng_ust_ctl_channel_get_wakeup_fd(chan); | |
74d81a6c MD |
1454 | return chan; |
1455 | ||
1456 | chan_error: | |
1457 | free(chan); | |
1458 | return NULL; | |
57773204 MD |
1459 | } |
1460 | ||
249cffb5 | 1461 | void lttng_ust_ctl_destroy_channel(struct lttng_ust_ctl_consumer_channel *chan) |
57773204 | 1462 | { |
249cffb5 MJ |
1463 | (void) lttng_ust_ctl_channel_close_wait_fd(chan); |
1464 | (void) lttng_ust_ctl_channel_close_wakeup_fd(chan); | |
a880bae5 | 1465 | chan->chan->ops->priv->channel_destroy(chan->chan); |
74d81a6c MD |
1466 | free(chan); |
1467 | } | |
1468 | ||
249cffb5 MJ |
1469 | int lttng_ust_ctl_send_channel_to_sessiond(int sock, |
1470 | struct lttng_ust_ctl_consumer_channel *channel) | |
74d81a6c MD |
1471 | { |
1472 | struct shm_object_table *table; | |
57773204 | 1473 | |
07539b34 | 1474 | table = channel->chan->priv->rb_chan->handle->table; |
74d81a6c | 1475 | if (table->size <= 0) |
9bfc503d | 1476 | return -EINVAL; |
249cffb5 | 1477 | return lttng_ust_ctl_send_channel(sock, |
74d81a6c MD |
1478 | channel->attr.type, |
1479 | table->objects[0].memory_map, | |
1480 | table->objects[0].memory_map_size, | |
ff0f5728 | 1481 | channel->wakeup_fd, |
74d81a6c MD |
1482 | 0); |
1483 | } | |
9bfc503d | 1484 | |
249cffb5 MJ |
1485 | int lttng_ust_ctl_send_stream_to_sessiond(int sock, |
1486 | struct lttng_ust_ctl_consumer_stream *stream) | |
74d81a6c MD |
1487 | { |
1488 | if (!stream) | |
249cffb5 | 1489 | return lttng_ust_ctl_send_stream(sock, -1U, -1U, -1, -1, 0); |
74d81a6c | 1490 | |
249cffb5 | 1491 | return lttng_ust_ctl_send_stream(sock, |
74d81a6c MD |
1492 | stream->cpu, |
1493 | stream->memory_map_size, | |
1494 | stream->shm_fd, stream->wakeup_fd, | |
1495 | 0); | |
57773204 MD |
1496 | } |
1497 | ||
249cffb5 MJ |
1498 | int lttng_ust_ctl_write_metadata_to_channel( |
1499 | struct lttng_ust_ctl_consumer_channel *channel, | |
c9023c93 MD |
1500 | const char *metadata_str, /* NOT null-terminated */ |
1501 | size_t len) /* metadata length */ | |
1502 | { | |
b5457df5 | 1503 | struct lttng_ust_ring_buffer_ctx ctx; |
e7bc0ef6 | 1504 | struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan; |
b5457df5 | 1505 | struct lttng_ust_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan; |
c9023c93 MD |
1506 | const char *str = metadata_str; |
1507 | int ret = 0, waitret; | |
1508 | size_t reserve_len, pos; | |
1509 | ||
1510 | for (pos = 0; pos < len; pos += reserve_len) { | |
1511 | reserve_len = min_t(size_t, | |
07539b34 | 1512 | lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf), |
c9023c93 | 1513 | len - pos); |
b5457df5 | 1514 | lttng_ust_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL); |
c9023c93 MD |
1515 | /* |
1516 | * We don't care about metadata buffer's records lost | |
1517 | * count, because we always retry here. Report error if | |
1518 | * we need to bail out after timeout or being | |
1519 | * interrupted. | |
1520 | */ | |
1521 | waitret = wait_cond_interruptible_timeout( | |
1522 | ({ | |
8936b6c0 | 1523 | ret = lttng_chan_buf->ops->event_reserve(&ctx); |
c9023c93 MD |
1524 | ret != -ENOBUFS || !ret; |
1525 | }), | |
1526 | LTTNG_METADATA_TIMEOUT_MSEC); | |
1527 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { | |
1528 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", | |
1529 | waitret == -EINTR ? "interrupted" : | |
1530 | (ret == -ENOBUFS ? "timeout" : "I/O error")); | |
1531 | if (waitret == -EINTR) | |
1532 | ret = waitret; | |
1533 | goto end; | |
1534 | } | |
8936b6c0 | 1535 | lttng_chan_buf->ops->event_write(&ctx, &str[pos], reserve_len, 1); |
e7bc0ef6 | 1536 | lttng_chan_buf->ops->event_commit(&ctx); |
c9023c93 MD |
1537 | } |
1538 | end: | |
1539 | return ret; | |
1540 | } | |
1541 | ||
3ef94b0e JD |
1542 | /* |
1543 | * Write at most one packet in the channel. | |
1544 | * Returns the number of bytes written on success, < 0 on error. | |
1545 | */ | |
249cffb5 MJ |
1546 | ssize_t lttng_ust_ctl_write_one_packet_to_channel( |
1547 | struct lttng_ust_ctl_consumer_channel *channel, | |
3ef94b0e JD |
1548 | const char *metadata_str, /* NOT null-terminated */ |
1549 | size_t len) /* metadata length */ | |
1550 | { | |
b5457df5 | 1551 | struct lttng_ust_ring_buffer_ctx ctx; |
e7bc0ef6 | 1552 | struct lttng_ust_channel_buffer *lttng_chan_buf = channel->chan; |
b5457df5 | 1553 | struct lttng_ust_ring_buffer_channel *rb_chan = lttng_chan_buf->priv->rb_chan; |
3ef94b0e JD |
1554 | const char *str = metadata_str; |
1555 | ssize_t reserve_len; | |
1556 | int ret; | |
1557 | ||
1558 | reserve_len = min_t(ssize_t, | |
07539b34 | 1559 | lttng_chan_buf->ops->priv->packet_avail_size(lttng_chan_buf), |
3ef94b0e | 1560 | len); |
b5457df5 | 1561 | lttng_ust_ring_buffer_ctx_init(&ctx, rb_chan, reserve_len, sizeof(char), NULL); |
8936b6c0 | 1562 | ret = lttng_chan_buf->ops->event_reserve(&ctx); |
3ef94b0e JD |
1563 | if (ret != 0) { |
1564 | DBG("LTTng: event reservation failed"); | |
1565 | assert(ret < 0); | |
1566 | reserve_len = ret; | |
1567 | goto end; | |
1568 | } | |
8936b6c0 | 1569 | lttng_chan_buf->ops->event_write(&ctx, str, reserve_len, 1); |
e7bc0ef6 | 1570 | lttng_chan_buf->ops->event_commit(&ctx); |
3ef94b0e JD |
1571 | |
1572 | end: | |
1573 | return reserve_len; | |
1574 | } | |
1575 | ||
249cffb5 | 1576 | int lttng_ust_ctl_channel_close_wait_fd(struct lttng_ust_ctl_consumer_channel *consumer_chan) |
ff0f5728 | 1577 | { |
b5457df5 | 1578 | struct lttng_ust_ring_buffer_channel *chan; |
cb7378b3 | 1579 | int ret; |
ff0f5728 | 1580 | |
07539b34 | 1581 | chan = consumer_chan->chan->priv->rb_chan; |
cb7378b3 | 1582 | ret = ring_buffer_channel_close_wait_fd(&chan->backend.config, |
ff0f5728 | 1583 | chan, chan->handle); |
cb7378b3 MD |
1584 | if (!ret) |
1585 | consumer_chan->wait_fd = -1; | |
1586 | return ret; | |
ff0f5728 MD |
1587 | } |
1588 | ||
249cffb5 | 1589 | int lttng_ust_ctl_channel_close_wakeup_fd(struct lttng_ust_ctl_consumer_channel *consumer_chan) |
ff0f5728 | 1590 | { |
b5457df5 | 1591 | struct lttng_ust_ring_buffer_channel *chan; |
cb7378b3 | 1592 | int ret; |
ff0f5728 | 1593 | |
07539b34 | 1594 | chan = consumer_chan->chan->priv->rb_chan; |
cb7378b3 | 1595 | ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config, |
ff0f5728 | 1596 | chan, chan->handle); |
cb7378b3 MD |
1597 | if (!ret) |
1598 | consumer_chan->wakeup_fd = -1; | |
1599 | return ret; | |
ff0f5728 MD |
1600 | } |
1601 | ||
249cffb5 | 1602 | int lttng_ust_ctl_stream_close_wait_fd(struct lttng_ust_ctl_consumer_stream *stream) |
5224b5c8 | 1603 | { |
b5457df5 | 1604 | struct lttng_ust_ring_buffer_channel *chan; |
5224b5c8 | 1605 | |
07539b34 | 1606 | chan = stream->chan->chan->priv->rb_chan; |
ff0f5728 | 1607 | return ring_buffer_stream_close_wait_fd(&chan->backend.config, |
07539b34 | 1608 | chan, chan->handle, stream->cpu); |
5224b5c8 MD |
1609 | } |
1610 | ||
249cffb5 | 1611 | int lttng_ust_ctl_stream_close_wakeup_fd(struct lttng_ust_ctl_consumer_stream *stream) |
6e922b24 | 1612 | { |
b5457df5 | 1613 | struct lttng_ust_ring_buffer_channel *chan; |
74d81a6c | 1614 | |
07539b34 | 1615 | chan = stream->chan->chan->priv->rb_chan; |
ff0f5728 | 1616 | return ring_buffer_stream_close_wakeup_fd(&chan->backend.config, |
07539b34 | 1617 | chan, chan->handle, stream->cpu); |
74d81a6c MD |
1618 | } |
1619 | ||
249cffb5 MJ |
1620 | struct lttng_ust_ctl_consumer_stream * |
1621 | lttng_ust_ctl_create_stream(struct lttng_ust_ctl_consumer_channel *channel, | |
74d81a6c MD |
1622 | int cpu) |
1623 | { | |
249cffb5 | 1624 | struct lttng_ust_ctl_consumer_stream *stream; |
74d81a6c | 1625 | struct lttng_ust_shm_handle *handle; |
b5457df5 | 1626 | struct lttng_ust_ring_buffer_channel *rb_chan; |
74d81a6c MD |
1627 | int shm_fd, wait_fd, wakeup_fd; |
1628 | uint64_t memory_map_size; | |
434897ee | 1629 | void *memory_map_addr; |
b5457df5 | 1630 | struct lttng_ust_ring_buffer *buf; |
6e922b24 MD |
1631 | int ret; |
1632 | ||
74d81a6c MD |
1633 | if (!channel) |
1634 | return NULL; | |
07539b34 MD |
1635 | rb_chan = channel->chan->priv->rb_chan; |
1636 | handle = rb_chan->handle; | |
9bfc503d MD |
1637 | if (!handle) |
1638 | return NULL; | |
1639 | ||
07539b34 MD |
1640 | buf = channel_get_ring_buffer(&rb_chan->backend.config, |
1641 | rb_chan, cpu, handle, &shm_fd, &wait_fd, | |
434897ee | 1642 | &wakeup_fd, &memory_map_size, &memory_map_addr); |
6e922b24 MD |
1643 | if (!buf) |
1644 | return NULL; | |
74d81a6c | 1645 | ret = lib_ring_buffer_open_read(buf, handle); |
6e922b24 MD |
1646 | if (ret) |
1647 | return NULL; | |
74d81a6c MD |
1648 | |
1649 | stream = zmalloc(sizeof(*stream)); | |
1650 | if (!stream) | |
1651 | goto alloc_error; | |
74d81a6c MD |
1652 | stream->buf = buf; |
1653 | stream->chan = channel; | |
1654 | stream->shm_fd = shm_fd; | |
1655 | stream->wait_fd = wait_fd; | |
1656 | stream->wakeup_fd = wakeup_fd; | |
1657 | stream->memory_map_size = memory_map_size; | |
434897ee | 1658 | stream->memory_map_addr = memory_map_addr; |
74d81a6c MD |
1659 | stream->cpu = cpu; |
1660 | return stream; | |
1661 | ||
1662 | alloc_error: | |
1663 | return NULL; | |
1664 | } | |
1665 | ||
249cffb5 | 1666 | void lttng_ust_ctl_destroy_stream(struct lttng_ust_ctl_consumer_stream *stream) |
74d81a6c | 1667 | { |
b5457df5 | 1668 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1669 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
74d81a6c MD |
1670 | |
1671 | assert(stream); | |
1672 | buf = stream->buf; | |
1673 | consumer_chan = stream->chan; | |
249cffb5 MJ |
1674 | (void) lttng_ust_ctl_stream_close_wait_fd(stream); |
1675 | (void) lttng_ust_ctl_stream_close_wakeup_fd(stream); | |
07539b34 | 1676 | lib_ring_buffer_release_read(buf, consumer_chan->chan->priv->rb_chan->handle); |
74d81a6c | 1677 | free(stream); |
6e922b24 MD |
1678 | } |
1679 | ||
249cffb5 | 1680 | int lttng_ust_ctl_channel_get_wait_fd(struct lttng_ust_ctl_consumer_channel *chan) |
ff0f5728 MD |
1681 | { |
1682 | if (!chan) | |
1683 | return -EINVAL; | |
07539b34 MD |
1684 | return shm_get_wait_fd(chan->chan->priv->rb_chan->handle, |
1685 | &chan->chan->priv->rb_chan->handle->chan._ref); | |
ff0f5728 MD |
1686 | } |
1687 | ||
249cffb5 | 1688 | int lttng_ust_ctl_channel_get_wakeup_fd(struct lttng_ust_ctl_consumer_channel *chan) |
ff0f5728 MD |
1689 | { |
1690 | if (!chan) | |
1691 | return -EINVAL; | |
07539b34 MD |
1692 | return shm_get_wakeup_fd(chan->chan->priv->rb_chan->handle, |
1693 | &chan->chan->priv->rb_chan->handle->chan._ref); | |
ff0f5728 MD |
1694 | } |
1695 | ||
249cffb5 | 1696 | int lttng_ust_ctl_stream_get_wait_fd(struct lttng_ust_ctl_consumer_stream *stream) |
6e922b24 | 1697 | { |
b5457df5 | 1698 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1699 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
74d81a6c MD |
1700 | |
1701 | if (!stream) | |
1702 | return -EINVAL; | |
1703 | buf = stream->buf; | |
1704 | consumer_chan = stream->chan; | |
07539b34 | 1705 | return shm_get_wait_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref); |
74d81a6c MD |
1706 | } |
1707 | ||
249cffb5 | 1708 | int lttng_ust_ctl_stream_get_wakeup_fd(struct lttng_ust_ctl_consumer_stream *stream) |
74d81a6c | 1709 | { |
b5457df5 | 1710 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1711 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
74d81a6c MD |
1712 | |
1713 | if (!stream) | |
1714 | return -EINVAL; | |
1715 | buf = stream->buf; | |
1716 | consumer_chan = stream->chan; | |
07539b34 | 1717 | return shm_get_wakeup_fd(consumer_chan->chan->priv->rb_chan->handle, &buf->self._ref); |
6e922b24 MD |
1718 | } |
1719 | ||
57773204 MD |
1720 | /* For mmap mode, readable without "get" operation */ |
1721 | ||
249cffb5 | 1722 | void *lttng_ust_ctl_get_mmap_base(struct lttng_ust_ctl_consumer_stream *stream) |
9095efe9 | 1723 | { |
b5457df5 | 1724 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1725 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee MD |
1726 | struct lttng_ust_sigbus_range range; |
1727 | void *p; | |
74d81a6c MD |
1728 | |
1729 | if (!stream) | |
9bfc503d | 1730 | return NULL; |
74d81a6c MD |
1731 | buf = stream->buf; |
1732 | consumer_chan = stream->chan; | |
434897ee MD |
1733 | if (sigbus_begin()) |
1734 | return NULL; | |
1735 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1736 | stream->memory_map_size); | |
1737 | p = shmp(consumer_chan->chan->priv->rb_chan->handle, buf->backend.memory_map); | |
1738 | lttng_ust_sigbus_del_range(&range); | |
1739 | sigbus_end(); | |
1740 | return p; /* Users of this pointer should check for sigbus. */ | |
9095efe9 MD |
1741 | } |
1742 | ||
57773204 | 1743 | /* returns the length to mmap. */ |
249cffb5 | 1744 | int lttng_ust_ctl_get_mmap_len(struct lttng_ust_ctl_consumer_stream *stream, |
57773204 MD |
1745 | unsigned long *len) |
1746 | { | |
249cffb5 | 1747 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
57773204 | 1748 | unsigned long mmap_buf_len; |
b5457df5 | 1749 | struct lttng_ust_ring_buffer_channel *rb_chan; |
57773204 | 1750 | |
74d81a6c | 1751 | if (!stream) |
9bfc503d | 1752 | return -EINVAL; |
74d81a6c | 1753 | consumer_chan = stream->chan; |
07539b34 MD |
1754 | rb_chan = consumer_chan->chan->priv->rb_chan; |
1755 | if (rb_chan->backend.config.output != RING_BUFFER_MMAP) | |
57773204 | 1756 | return -EINVAL; |
07539b34 MD |
1757 | mmap_buf_len = rb_chan->backend.buf_size; |
1758 | if (rb_chan->backend.extra_reader_sb) | |
1759 | mmap_buf_len += rb_chan->backend.subbuf_size; | |
57773204 MD |
1760 | if (mmap_buf_len > INT_MAX) |
1761 | return -EFBIG; | |
1762 | *len = mmap_buf_len; | |
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | /* returns the maximum size for sub-buffers. */ | |
249cffb5 | 1767 | int lttng_ust_ctl_get_max_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
57773204 MD |
1768 | unsigned long *len) |
1769 | { | |
249cffb5 | 1770 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
b5457df5 | 1771 | struct lttng_ust_ring_buffer_channel *rb_chan; |
57773204 | 1772 | |
74d81a6c | 1773 | if (!stream) |
9bfc503d | 1774 | return -EINVAL; |
74d81a6c | 1775 | consumer_chan = stream->chan; |
07539b34 MD |
1776 | rb_chan = consumer_chan->chan->priv->rb_chan; |
1777 | *len = rb_chan->backend.subbuf_size; | |
57773204 MD |
1778 | return 0; |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * For mmap mode, operate on the current packet (between get/put or | |
1783 | * get_next/put_next). | |
1784 | */ | |
1785 | ||
1786 | /* returns the offset of the subbuffer belonging to the mmap reader. */ | |
249cffb5 | 1787 | int lttng_ust_ctl_get_mmap_read_offset(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 1788 | unsigned long *off) |
57773204 | 1789 | { |
b5457df5 | 1790 | struct lttng_ust_ring_buffer_channel *rb_chan; |
57773204 | 1791 | unsigned long sb_bindex; |
b5457df5 | 1792 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1793 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
b5457df5 MD |
1794 | struct lttng_ust_ring_buffer_backend_pages_shmp *barray_idx; |
1795 | struct lttng_ust_ring_buffer_backend_pages *pages; | |
434897ee MD |
1796 | struct lttng_ust_sigbus_range range; |
1797 | int ret; | |
57773204 | 1798 | |
74d81a6c | 1799 | if (!stream) |
9bfc503d | 1800 | return -EINVAL; |
74d81a6c MD |
1801 | buf = stream->buf; |
1802 | consumer_chan = stream->chan; | |
07539b34 MD |
1803 | rb_chan = consumer_chan->chan->priv->rb_chan; |
1804 | if (rb_chan->backend.config.output != RING_BUFFER_MMAP) | |
57773204 | 1805 | return -EINVAL; |
434897ee MD |
1806 | |
1807 | if (sigbus_begin()) | |
1808 | return -EIO; | |
1809 | ret = 0; | |
1810 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1811 | stream->memory_map_size); | |
1812 | ||
07539b34 | 1813 | sb_bindex = subbuffer_id_get_index(&rb_chan->backend.config, |
32ce8569 | 1814 | buf->backend.buf_rsb.id); |
07539b34 | 1815 | barray_idx = shmp_index(rb_chan->handle, buf->backend.array, |
34daae3e | 1816 | sb_bindex); |
434897ee MD |
1817 | if (!barray_idx) { |
1818 | ret = -EINVAL; | |
1819 | goto end; | |
1820 | } | |
07539b34 | 1821 | pages = shmp(rb_chan->handle, barray_idx->shmp); |
434897ee MD |
1822 | if (!pages) { |
1823 | ret = -EINVAL; | |
1824 | goto end; | |
1825 | } | |
34daae3e | 1826 | *off = pages->mmap_offset; |
434897ee MD |
1827 | end: |
1828 | lttng_ust_sigbus_del_range(&range); | |
1829 | sigbus_end(); | |
1830 | return ret; | |
57773204 MD |
1831 | } |
1832 | ||
1833 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
249cffb5 | 1834 | int lttng_ust_ctl_get_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 1835 | unsigned long *len) |
57773204 | 1836 | { |
249cffb5 | 1837 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
b5457df5 MD |
1838 | struct lttng_ust_ring_buffer_channel *rb_chan; |
1839 | struct lttng_ust_ring_buffer *buf; | |
434897ee | 1840 | struct lttng_ust_sigbus_range range; |
57773204 | 1841 | |
74d81a6c | 1842 | if (!stream) |
9bfc503d MD |
1843 | return -EINVAL; |
1844 | ||
74d81a6c MD |
1845 | buf = stream->buf; |
1846 | consumer_chan = stream->chan; | |
07539b34 | 1847 | rb_chan = consumer_chan->chan->priv->rb_chan; |
434897ee MD |
1848 | if (sigbus_begin()) |
1849 | return -EIO; | |
1850 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1851 | stream->memory_map_size); | |
07539b34 MD |
1852 | *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf, |
1853 | rb_chan->handle); | |
434897ee MD |
1854 | lttng_ust_sigbus_del_range(&range); |
1855 | sigbus_end(); | |
57773204 MD |
1856 | return 0; |
1857 | } | |
1858 | ||
1859 | /* returns the size of the current sub-buffer, without padding (for mmap). */ | |
249cffb5 | 1860 | int lttng_ust_ctl_get_padded_subbuf_size(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 1861 | unsigned long *len) |
57773204 | 1862 | { |
249cffb5 | 1863 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
b5457df5 MD |
1864 | struct lttng_ust_ring_buffer_channel *rb_chan; |
1865 | struct lttng_ust_ring_buffer *buf; | |
434897ee | 1866 | struct lttng_ust_sigbus_range range; |
57773204 | 1867 | |
74d81a6c | 1868 | if (!stream) |
9bfc503d | 1869 | return -EINVAL; |
74d81a6c MD |
1870 | buf = stream->buf; |
1871 | consumer_chan = stream->chan; | |
07539b34 | 1872 | rb_chan = consumer_chan->chan->priv->rb_chan; |
434897ee MD |
1873 | if (sigbus_begin()) |
1874 | return -EIO; | |
1875 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1876 | stream->memory_map_size); | |
07539b34 MD |
1877 | *len = lib_ring_buffer_get_read_data_size(&rb_chan->backend.config, buf, |
1878 | rb_chan->handle); | |
b72687b8 | 1879 | *len = LTTNG_UST_PAGE_ALIGN(*len); |
434897ee MD |
1880 | lttng_ust_sigbus_del_range(&range); |
1881 | sigbus_end(); | |
57773204 MD |
1882 | return 0; |
1883 | } | |
1884 | ||
1885 | /* Get exclusive read access to the next sub-buffer that can be read. */ | |
249cffb5 | 1886 | int lttng_ust_ctl_get_next_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
57773204 | 1887 | { |
b5457df5 | 1888 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1889 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee MD |
1890 | struct lttng_ust_sigbus_range range; |
1891 | int ret; | |
9bfc503d | 1892 | |
74d81a6c MD |
1893 | if (!stream) |
1894 | return -EINVAL; | |
1895 | buf = stream->buf; | |
1896 | consumer_chan = stream->chan; | |
434897ee MD |
1897 | if (sigbus_begin()) |
1898 | return -EIO; | |
1899 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1900 | stream->memory_map_size); | |
1901 | ret = lib_ring_buffer_get_next_subbuf(buf, | |
07539b34 | 1902 | consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
1903 | lttng_ust_sigbus_del_range(&range); |
1904 | sigbus_end(); | |
1905 | return ret; | |
57773204 MD |
1906 | } |
1907 | ||
57773204 | 1908 | /* Release exclusive sub-buffer access, move consumer forward. */ |
249cffb5 | 1909 | int lttng_ust_ctl_put_next_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
57773204 | 1910 | { |
b5457df5 | 1911 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1912 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee | 1913 | struct lttng_ust_sigbus_range range; |
9bfc503d | 1914 | |
74d81a6c MD |
1915 | if (!stream) |
1916 | return -EINVAL; | |
1917 | buf = stream->buf; | |
1918 | consumer_chan = stream->chan; | |
434897ee MD |
1919 | if (sigbus_begin()) |
1920 | return -EIO; | |
1921 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1922 | stream->memory_map_size); | |
07539b34 | 1923 | lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
1924 | lttng_ust_sigbus_del_range(&range); |
1925 | sigbus_end(); | |
57773204 MD |
1926 | return 0; |
1927 | } | |
1928 | ||
1929 | /* snapshot */ | |
1930 | ||
1931 | /* Get a snapshot of the current ring buffer producer and consumer positions */ | |
249cffb5 | 1932 | int lttng_ust_ctl_snapshot(struct lttng_ust_ctl_consumer_stream *stream) |
57773204 | 1933 | { |
b5457df5 | 1934 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1935 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee MD |
1936 | struct lttng_ust_sigbus_range range; |
1937 | int ret; | |
9bfc503d | 1938 | |
74d81a6c MD |
1939 | if (!stream) |
1940 | return -EINVAL; | |
1941 | buf = stream->buf; | |
1942 | consumer_chan = stream->chan; | |
434897ee MD |
1943 | if (sigbus_begin()) |
1944 | return -EIO; | |
1945 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1946 | stream->memory_map_size); | |
1947 | ret = lib_ring_buffer_snapshot(buf, &buf->cons_snapshot, | |
07539b34 | 1948 | &buf->prod_snapshot, consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
1949 | lttng_ust_sigbus_del_range(&range); |
1950 | sigbus_end(); | |
1951 | return ret; | |
57773204 MD |
1952 | } |
1953 | ||
f45930b7 JG |
1954 | /* |
1955 | * Get a snapshot of the current ring buffer producer and consumer positions | |
1956 | * even if the consumed and produced positions are contained within the same | |
1957 | * subbuffer. | |
1958 | */ | |
249cffb5 | 1959 | int lttng_ust_ctl_snapshot_sample_positions(struct lttng_ust_ctl_consumer_stream *stream) |
f45930b7 | 1960 | { |
b5457df5 | 1961 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 1962 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee MD |
1963 | struct lttng_ust_sigbus_range range; |
1964 | int ret; | |
f45930b7 JG |
1965 | |
1966 | if (!stream) | |
1967 | return -EINVAL; | |
1968 | buf = stream->buf; | |
1969 | consumer_chan = stream->chan; | |
434897ee MD |
1970 | if (sigbus_begin()) |
1971 | return -EIO; | |
1972 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
1973 | stream->memory_map_size); | |
1974 | ret = lib_ring_buffer_snapshot_sample_positions(buf, | |
f45930b7 | 1975 | &buf->cons_snapshot, &buf->prod_snapshot, |
07539b34 | 1976 | consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
1977 | lttng_ust_sigbus_del_range(&range); |
1978 | sigbus_end(); | |
1979 | return ret; | |
f45930b7 JG |
1980 | } |
1981 | ||
57773204 | 1982 | /* Get the consumer position (iteration start) */ |
249cffb5 | 1983 | int lttng_ust_ctl_snapshot_get_consumed(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 1984 | unsigned long *pos) |
57773204 | 1985 | { |
b5457df5 | 1986 | struct lttng_ust_ring_buffer *buf; |
9bfc503d | 1987 | |
74d81a6c MD |
1988 | if (!stream) |
1989 | return -EINVAL; | |
1990 | buf = stream->buf; | |
57773204 MD |
1991 | *pos = buf->cons_snapshot; |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | /* Get the producer position (iteration end) */ | |
249cffb5 | 1996 | int lttng_ust_ctl_snapshot_get_produced(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 1997 | unsigned long *pos) |
57773204 | 1998 | { |
b5457df5 | 1999 | struct lttng_ust_ring_buffer *buf; |
9bfc503d | 2000 | |
74d81a6c MD |
2001 | if (!stream) |
2002 | return -EINVAL; | |
2003 | buf = stream->buf; | |
57773204 MD |
2004 | *pos = buf->prod_snapshot; |
2005 | return 0; | |
2006 | } | |
2007 | ||
2008 | /* Get exclusive read access to the specified sub-buffer position */ | |
249cffb5 | 2009 | int lttng_ust_ctl_get_subbuf(struct lttng_ust_ctl_consumer_stream *stream, |
74d81a6c | 2010 | unsigned long *pos) |
57773204 | 2011 | { |
b5457df5 | 2012 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 2013 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee MD |
2014 | struct lttng_ust_sigbus_range range; |
2015 | int ret; | |
9bfc503d | 2016 | |
74d81a6c MD |
2017 | if (!stream) |
2018 | return -EINVAL; | |
2019 | buf = stream->buf; | |
2020 | consumer_chan = stream->chan; | |
434897ee MD |
2021 | if (sigbus_begin()) |
2022 | return -EIO; | |
2023 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2024 | stream->memory_map_size); | |
2025 | ret = lib_ring_buffer_get_subbuf(buf, *pos, | |
07539b34 | 2026 | consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
2027 | lttng_ust_sigbus_del_range(&range); |
2028 | sigbus_end(); | |
2029 | return ret; | |
57773204 MD |
2030 | } |
2031 | ||
2032 | /* Release exclusive sub-buffer access */ | |
249cffb5 | 2033 | int lttng_ust_ctl_put_subbuf(struct lttng_ust_ctl_consumer_stream *stream) |
57773204 | 2034 | { |
b5457df5 | 2035 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 2036 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee | 2037 | struct lttng_ust_sigbus_range range; |
9bfc503d | 2038 | |
74d81a6c MD |
2039 | if (!stream) |
2040 | return -EINVAL; | |
2041 | buf = stream->buf; | |
2042 | consumer_chan = stream->chan; | |
434897ee MD |
2043 | if (sigbus_begin()) |
2044 | return -EIO; | |
2045 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2046 | stream->memory_map_size); | |
07539b34 | 2047 | lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
2048 | lttng_ust_sigbus_del_range(&range); |
2049 | sigbus_end(); | |
57773204 MD |
2050 | return 0; |
2051 | } | |
2052 | ||
434897ee | 2053 | int lttng_ust_ctl_flush_buffer(struct lttng_ust_ctl_consumer_stream *stream, |
b52190f2 | 2054 | int producer_active) |
57773204 | 2055 | { |
b5457df5 | 2056 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 2057 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee | 2058 | struct lttng_ust_sigbus_range range; |
74d81a6c MD |
2059 | |
2060 | assert(stream); | |
2061 | buf = stream->buf; | |
2062 | consumer_chan = stream->chan; | |
434897ee MD |
2063 | if (sigbus_begin()) |
2064 | return -EIO; | |
2065 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2066 | stream->memory_map_size); | |
b52190f2 MD |
2067 | lib_ring_buffer_switch_slow(buf, |
2068 | producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH, | |
07539b34 | 2069 | consumer_chan->chan->priv->rb_chan->handle); |
434897ee MD |
2070 | lttng_ust_sigbus_del_range(&range); |
2071 | sigbus_end(); | |
2072 | return 0; | |
74d81a6c MD |
2073 | } |
2074 | ||
434897ee | 2075 | int lttng_ust_ctl_clear_buffer(struct lttng_ust_ctl_consumer_stream *stream) |
beca55a1 | 2076 | { |
b5457df5 | 2077 | struct lttng_ust_ring_buffer *buf; |
249cffb5 | 2078 | struct lttng_ust_ctl_consumer_channel *consumer_chan; |
434897ee | 2079 | struct lttng_ust_sigbus_range range; |
beca55a1 MD |
2080 | |
2081 | assert(stream); | |
2082 | buf = stream->buf; | |
2083 | consumer_chan = stream->chan; | |
434897ee MD |
2084 | if (sigbus_begin()) |
2085 | return -EIO; | |
2086 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2087 | stream->memory_map_size); | |
beca55a1 | 2088 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE, |
07539b34 MD |
2089 | consumer_chan->chan->priv->rb_chan->handle); |
2090 | lib_ring_buffer_clear_reader(buf, consumer_chan->chan->priv->rb_chan->handle); | |
434897ee MD |
2091 | lttng_ust_sigbus_del_range(&range); |
2092 | sigbus_end(); | |
2093 | return 0; | |
beca55a1 MD |
2094 | } |
2095 | ||
b2f3252a JD |
2096 | static |
2097 | struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb( | |
b5457df5 MD |
2098 | struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
2099 | struct lttng_ust_ring_buffer_channel *chan) | |
b2f3252a | 2100 | { |
b5457df5 | 2101 | const struct lttng_ust_ring_buffer_config *config; |
b2f3252a JD |
2102 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; |
2103 | ||
b2f3252a JD |
2104 | config = &chan->backend.config; |
2105 | if (!config->cb_ptr) | |
2106 | return NULL; | |
2107 | client_cb = caa_container_of(config->cb_ptr, | |
2108 | struct lttng_ust_client_lib_ring_buffer_client_cb, | |
2109 | parent); | |
2110 | return client_cb; | |
2111 | } | |
2112 | ||
249cffb5 | 2113 | int lttng_ust_ctl_get_timestamp_begin(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2114 | uint64_t *timestamp_begin) |
2115 | { | |
2116 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2117 | struct lttng_ust_ring_buffer_channel *chan; |
2118 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2119 | struct lttng_ust_sigbus_range range; |
2120 | int ret; | |
b2f3252a JD |
2121 | |
2122 | if (!stream || !timestamp_begin) | |
2123 | return -EINVAL; | |
e1919a41 | 2124 | buf = stream->buf; |
07539b34 MD |
2125 | chan = stream->chan->chan->priv->rb_chan; |
2126 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2127 | if (!client_cb) |
2128 | return -ENOSYS; | |
434897ee MD |
2129 | if (sigbus_begin()) |
2130 | return -EIO; | |
2131 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2132 | stream->memory_map_size); | |
2133 | ret = client_cb->timestamp_begin(buf, chan, timestamp_begin); | |
2134 | lttng_ust_sigbus_del_range(&range); | |
2135 | sigbus_end(); | |
2136 | return ret; | |
b2f3252a JD |
2137 | } |
2138 | ||
249cffb5 | 2139 | int lttng_ust_ctl_get_timestamp_end(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2140 | uint64_t *timestamp_end) |
2141 | { | |
2142 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2143 | struct lttng_ust_ring_buffer_channel *chan; |
2144 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2145 | struct lttng_ust_sigbus_range range; |
2146 | int ret; | |
b2f3252a JD |
2147 | |
2148 | if (!stream || !timestamp_end) | |
2149 | return -EINVAL; | |
e1919a41 | 2150 | buf = stream->buf; |
07539b34 MD |
2151 | chan = stream->chan->chan->priv->rb_chan; |
2152 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2153 | if (!client_cb) |
2154 | return -ENOSYS; | |
434897ee MD |
2155 | if (sigbus_begin()) |
2156 | return -EIO; | |
2157 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2158 | stream->memory_map_size); | |
2159 | ret = client_cb->timestamp_end(buf, chan, timestamp_end); | |
2160 | lttng_ust_sigbus_del_range(&range); | |
2161 | sigbus_end(); | |
2162 | return ret; | |
b2f3252a JD |
2163 | } |
2164 | ||
249cffb5 | 2165 | int lttng_ust_ctl_get_events_discarded(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2166 | uint64_t *events_discarded) |
2167 | { | |
2168 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2169 | struct lttng_ust_ring_buffer_channel *chan; |
2170 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2171 | struct lttng_ust_sigbus_range range; |
2172 | int ret; | |
b2f3252a JD |
2173 | |
2174 | if (!stream || !events_discarded) | |
2175 | return -EINVAL; | |
e1919a41 | 2176 | buf = stream->buf; |
07539b34 MD |
2177 | chan = stream->chan->chan->priv->rb_chan; |
2178 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2179 | if (!client_cb) |
2180 | return -ENOSYS; | |
434897ee MD |
2181 | if (sigbus_begin()) |
2182 | return -EIO; | |
2183 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2184 | stream->memory_map_size); | |
2185 | ret = client_cb->events_discarded(buf, chan, events_discarded); | |
2186 | lttng_ust_sigbus_del_range(&range); | |
2187 | sigbus_end(); | |
2188 | return ret; | |
b2f3252a JD |
2189 | } |
2190 | ||
249cffb5 | 2191 | int lttng_ust_ctl_get_content_size(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2192 | uint64_t *content_size) |
2193 | { | |
2194 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2195 | struct lttng_ust_ring_buffer_channel *chan; |
2196 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2197 | struct lttng_ust_sigbus_range range; |
2198 | int ret; | |
b2f3252a JD |
2199 | |
2200 | if (!stream || !content_size) | |
2201 | return -EINVAL; | |
e1919a41 | 2202 | buf = stream->buf; |
07539b34 MD |
2203 | chan = stream->chan->chan->priv->rb_chan; |
2204 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2205 | if (!client_cb) |
2206 | return -ENOSYS; | |
434897ee MD |
2207 | if (sigbus_begin()) |
2208 | return -EIO; | |
2209 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2210 | stream->memory_map_size); | |
2211 | ret = client_cb->content_size(buf, chan, content_size); | |
2212 | lttng_ust_sigbus_del_range(&range); | |
2213 | sigbus_end(); | |
2214 | return ret; | |
b2f3252a JD |
2215 | } |
2216 | ||
249cffb5 | 2217 | int lttng_ust_ctl_get_packet_size(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2218 | uint64_t *packet_size) |
2219 | { | |
2220 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2221 | struct lttng_ust_ring_buffer_channel *chan; |
2222 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2223 | struct lttng_ust_sigbus_range range; |
2224 | int ret; | |
b2f3252a JD |
2225 | |
2226 | if (!stream || !packet_size) | |
2227 | return -EINVAL; | |
e1919a41 | 2228 | buf = stream->buf; |
07539b34 MD |
2229 | chan = stream->chan->chan->priv->rb_chan; |
2230 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2231 | if (!client_cb) |
2232 | return -ENOSYS; | |
434897ee MD |
2233 | if (sigbus_begin()) |
2234 | return -EIO; | |
2235 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2236 | stream->memory_map_size); | |
2237 | ret = client_cb->packet_size(buf, chan, packet_size); | |
2238 | lttng_ust_sigbus_del_range(&range); | |
2239 | sigbus_end(); | |
2240 | return ret; | |
b2f3252a JD |
2241 | } |
2242 | ||
249cffb5 | 2243 | int lttng_ust_ctl_get_stream_id(struct lttng_ust_ctl_consumer_stream *stream, |
b2f3252a JD |
2244 | uint64_t *stream_id) |
2245 | { | |
2246 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2247 | struct lttng_ust_ring_buffer_channel *chan; |
2248 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2249 | struct lttng_ust_sigbus_range range; |
2250 | int ret; | |
b2f3252a JD |
2251 | |
2252 | if (!stream || !stream_id) | |
2253 | return -EINVAL; | |
e1919a41 | 2254 | buf = stream->buf; |
07539b34 MD |
2255 | chan = stream->chan->chan->priv->rb_chan; |
2256 | client_cb = get_client_cb(buf, chan); | |
b2f3252a JD |
2257 | if (!client_cb) |
2258 | return -ENOSYS; | |
434897ee MD |
2259 | if (sigbus_begin()) |
2260 | return -EIO; | |
2261 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2262 | stream->memory_map_size); | |
2263 | ret = client_cb->stream_id(buf, chan, stream_id); | |
2264 | lttng_ust_sigbus_del_range(&range); | |
2265 | sigbus_end(); | |
2266 | return ret; | |
b2f3252a JD |
2267 | } |
2268 | ||
249cffb5 | 2269 | int lttng_ust_ctl_get_current_timestamp(struct lttng_ust_ctl_consumer_stream *stream, |
fca361e8 JD |
2270 | uint64_t *ts) |
2271 | { | |
2272 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2273 | struct lttng_ust_ring_buffer_channel *chan; |
2274 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2275 | struct lttng_ust_sigbus_range range; |
2276 | int ret; | |
fca361e8 JD |
2277 | |
2278 | if (!stream || !ts) | |
2279 | return -EINVAL; | |
e1919a41 | 2280 | buf = stream->buf; |
07539b34 MD |
2281 | chan = stream->chan->chan->priv->rb_chan; |
2282 | client_cb = get_client_cb(buf, chan); | |
fca361e8 JD |
2283 | if (!client_cb || !client_cb->current_timestamp) |
2284 | return -ENOSYS; | |
434897ee MD |
2285 | if (sigbus_begin()) |
2286 | return -EIO; | |
2287 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2288 | stream->memory_map_size); | |
2289 | ret = client_cb->current_timestamp(buf, chan, ts); | |
2290 | lttng_ust_sigbus_del_range(&range); | |
2291 | sigbus_end(); | |
2292 | return ret; | |
fca361e8 JD |
2293 | } |
2294 | ||
249cffb5 | 2295 | int lttng_ust_ctl_get_sequence_number(struct lttng_ust_ctl_consumer_stream *stream, |
1ff31389 JD |
2296 | uint64_t *seq) |
2297 | { | |
2298 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2299 | struct lttng_ust_ring_buffer_channel *chan; |
2300 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2301 | struct lttng_ust_sigbus_range range; |
2302 | int ret; | |
1ff31389 JD |
2303 | |
2304 | if (!stream || !seq) | |
2305 | return -EINVAL; | |
2306 | buf = stream->buf; | |
07539b34 MD |
2307 | chan = stream->chan->chan->priv->rb_chan; |
2308 | client_cb = get_client_cb(buf, chan); | |
1ff31389 JD |
2309 | if (!client_cb || !client_cb->sequence_number) |
2310 | return -ENOSYS; | |
434897ee MD |
2311 | if (sigbus_begin()) |
2312 | return -EIO; | |
2313 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2314 | stream->memory_map_size); | |
2315 | ret = client_cb->sequence_number(buf, chan, seq); | |
2316 | lttng_ust_sigbus_del_range(&range); | |
2317 | sigbus_end(); | |
2318 | return ret; | |
1ff31389 JD |
2319 | } |
2320 | ||
249cffb5 | 2321 | int lttng_ust_ctl_get_instance_id(struct lttng_ust_ctl_consumer_stream *stream, |
45a00b05 JD |
2322 | uint64_t *id) |
2323 | { | |
2324 | struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb; | |
b5457df5 MD |
2325 | struct lttng_ust_ring_buffer_channel *chan; |
2326 | struct lttng_ust_ring_buffer *buf; | |
434897ee MD |
2327 | struct lttng_ust_sigbus_range range; |
2328 | int ret; | |
45a00b05 JD |
2329 | |
2330 | if (!stream || !id) | |
2331 | return -EINVAL; | |
2332 | buf = stream->buf; | |
07539b34 MD |
2333 | chan = stream->chan->chan->priv->rb_chan; |
2334 | client_cb = get_client_cb(buf, chan); | |
45a00b05 JD |
2335 | if (!client_cb) |
2336 | return -ENOSYS; | |
434897ee MD |
2337 | if (sigbus_begin()) |
2338 | return -EIO; | |
2339 | lttng_ust_sigbus_add_range(&range, stream->memory_map_addr, | |
2340 | stream->memory_map_size); | |
2341 | ret = client_cb->instance_id(buf, chan, id); | |
2342 | lttng_ust_sigbus_del_range(&range); | |
2343 | sigbus_end(); | |
2344 | return ret; | |
45a00b05 JD |
2345 | } |
2346 | ||
eeef0055 | 2347 | #ifdef HAVE_LINUX_PERF_EVENT_H |
57201bb3 | 2348 | |
249cffb5 | 2349 | int lttng_ust_ctl_has_perf_counters(void) |
57201bb3 MD |
2350 | { |
2351 | return 1; | |
2352 | } | |
2353 | ||
2354 | #else | |
2355 | ||
249cffb5 | 2356 | int lttng_ust_ctl_has_perf_counters(void) |
57201bb3 MD |
2357 | { |
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | #endif | |
2362 | ||
a834901f MD |
2363 | #ifdef __linux__ |
2364 | /* | |
2365 | * Override application pid/uid/gid with unix socket credentials. If | |
2366 | * the application announced a pid matching our view, it means it is | |
2367 | * within the same pid namespace, so expose the ppid provided by the | |
2368 | * application. | |
2369 | */ | |
2370 | static | |
2371 | int get_cred(int sock, | |
249cffb5 | 2372 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
a834901f MD |
2373 | uint32_t *pid, |
2374 | uint32_t *ppid, | |
2375 | uint32_t *uid, | |
2376 | uint32_t *gid) | |
2377 | { | |
2378 | struct ucred ucred; | |
2379 | socklen_t ucred_len = sizeof(struct ucred); | |
2380 | int ret; | |
2381 | ||
2382 | ret = getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &ucred, &ucred_len); | |
2383 | if (ret) { | |
2384 | return -LTTNG_UST_ERR_PEERCRED; | |
2385 | } | |
2386 | DBG("Unix socket peercred [ pid: %u, uid: %u, gid: %u ], " | |
2387 | "application registered claiming [ pid: %u, ppid: %u, uid: %u, gid: %u ]", | |
2388 | ucred.pid, ucred.uid, ucred.gid, | |
2389 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
2390 | if (!ucred.pid) { | |
2391 | ERR("Unix socket credential pid=0. Refusing application in distinct, non-nested pid namespace."); | |
2392 | return -LTTNG_UST_ERR_PEERCRED_PID; | |
2393 | } | |
2394 | *pid = ucred.pid; | |
2395 | *uid = ucred.uid; | |
2396 | *gid = ucred.gid; | |
2397 | if (ucred.pid == reg_msg->pid) { | |
2398 | *ppid = reg_msg->ppid; | |
2399 | } else { | |
2400 | *ppid = 0; | |
2401 | } | |
2402 | return 0; | |
2403 | } | |
2404 | #elif defined(__FreeBSD__) | |
2405 | #include <sys/ucred.h> | |
e494a9cd | 2406 | #include <sys/un.h> |
a834901f MD |
2407 | |
2408 | /* | |
2409 | * Override application uid/gid with unix socket credentials. Use the | |
2410 | * first group of the cr_groups. | |
2411 | * Use the pid and ppid provided by the application on registration. | |
2412 | */ | |
2413 | static | |
2414 | int get_cred(int sock, | |
249cffb5 | 2415 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
a834901f MD |
2416 | uint32_t *pid, |
2417 | uint32_t *ppid, | |
2418 | uint32_t *uid, | |
2419 | uint32_t *gid) | |
2420 | { | |
2421 | struct xucred xucred; | |
2422 | socklen_t xucred_len = sizeof(struct xucred); | |
2423 | int ret; | |
2424 | ||
2425 | ret = getsockopt(sock, SOL_SOCKET, LOCAL_PEERCRED, &xucred, &xucred_len); | |
2426 | if (ret) { | |
2427 | return -LTTNG_UST_ERR_PEERCRED; | |
2428 | } | |
2429 | if (xucred.cr_version != XUCRED_VERSION || xucred.cr_ngroups < 1) { | |
2430 | return -LTTNG_UST_ERR_PEERCRED; | |
2431 | } | |
2432 | DBG("Unix socket peercred [ uid: %u, gid: %u ], " | |
2433 | "application registered claiming [ pid: %d, ppid: %d, uid: %u, gid: %u ]", | |
e494a9cd | 2434 | xucred.cr_uid, xucred.cr_groups[0], |
a834901f MD |
2435 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); |
2436 | *pid = reg_msg->pid; | |
2437 | *ppid = reg_msg->ppid; | |
e494a9cd | 2438 | *uid = xucred.cr_uid; |
a834901f MD |
2439 | *gid = xucred.cr_groups[0]; |
2440 | return 0; | |
2441 | } | |
2442 | #else | |
2443 | #warning "Using insecure fallback: trusting user id provided by registered applications. Please consider implementing use of unix socket credentials on your platform." | |
2444 | static | |
2445 | int get_cred(int sock, | |
249cffb5 | 2446 | const struct lttng_ust_ctl_reg_msg *reg_msg, |
a834901f MD |
2447 | uint32_t *pid, |
2448 | uint32_t *ppid, | |
2449 | uint32_t *uid, | |
2450 | uint32_t *gid) | |
2451 | { | |
2452 | DBG("Application registered claiming [ pid: %u, ppid: %d, uid: %u, gid: %u ]", | |
2453 | reg_msg->pid, reg_msg->ppid, reg_msg->uid, reg_msg->gid); | |
2454 | *pid = reg_msg->pid; | |
2455 | *ppid = reg_msg->ppid; | |
2456 | *uid = reg_msg->uid; | |
2457 | *gid = reg_msg->gid; | |
2458 | return 0; | |
2459 | } | |
2460 | #endif | |
2461 | ||
32ce8569 MD |
2462 | /* |
2463 | * Returns 0 on success, negative error value on error. | |
2464 | */ | |
249cffb5 MJ |
2465 | int lttng_ust_ctl_recv_reg_msg(int sock, |
2466 | enum lttng_ust_ctl_socket_type *type, | |
32ce8569 MD |
2467 | uint32_t *major, |
2468 | uint32_t *minor, | |
2469 | uint32_t *pid, | |
2470 | uint32_t *ppid, | |
2471 | uint32_t *uid, | |
2472 | uint32_t *gid, | |
2473 | uint32_t *bits_per_long, | |
2474 | uint32_t *uint8_t_alignment, | |
2475 | uint32_t *uint16_t_alignment, | |
2476 | uint32_t *uint32_t_alignment, | |
2477 | uint32_t *uint64_t_alignment, | |
2478 | uint32_t *long_alignment, | |
2479 | int *byte_order, | |
2480 | char *name) | |
2481 | { | |
2482 | ssize_t len; | |
249cffb5 | 2483 | struct lttng_ust_ctl_reg_msg reg_msg; |
32ce8569 MD |
2484 | |
2485 | len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
2486 | if (len > 0 && len != sizeof(reg_msg)) | |
2487 | return -EIO; | |
2488 | if (len == 0) | |
2489 | return -EPIPE; | |
2490 | if (len < 0) | |
2491 | return len; | |
2492 | ||
fd17d7ce | 2493 | if (reg_msg.magic == LTTNG_UST_ABI_COMM_MAGIC) { |
baa8acf3 MJ |
2494 | *byte_order = LTTNG_UST_BYTE_ORDER == LTTNG_UST_BIG_ENDIAN ? |
2495 | LTTNG_UST_BIG_ENDIAN : LTTNG_UST_LITTLE_ENDIAN; | |
2496 | } else if (reg_msg.magic == lttng_ust_bswap_32(LTTNG_UST_ABI_COMM_MAGIC)) { | |
2497 | *byte_order = LTTNG_UST_BYTE_ORDER == LTTNG_UST_BIG_ENDIAN ? | |
2498 | LTTNG_UST_LITTLE_ENDIAN : LTTNG_UST_BIG_ENDIAN; | |
32ce8569 MD |
2499 | } else { |
2500 | return -LTTNG_UST_ERR_INVAL_MAGIC; | |
2501 | } | |
2502 | switch (reg_msg.socket_type) { | |
249cffb5 | 2503 | case 0: *type = LTTNG_UST_CTL_SOCKET_CMD; |
32ce8569 | 2504 | break; |
249cffb5 | 2505 | case 1: *type = LTTNG_UST_CTL_SOCKET_NOTIFY; |
32ce8569 MD |
2506 | break; |
2507 | default: | |
2508 | return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE; | |
2509 | } | |
2510 | *major = reg_msg.major; | |
2511 | *minor = reg_msg.minor; | |
32ce8569 MD |
2512 | *bits_per_long = reg_msg.bits_per_long; |
2513 | *uint8_t_alignment = reg_msg.uint8_t_alignment; | |
2514 | *uint16_t_alignment = reg_msg.uint16_t_alignment; | |
2515 | *uint32_t_alignment = reg_msg.uint32_t_alignment; | |
2516 | *uint64_t_alignment = reg_msg.uint64_t_alignment; | |
2517 | *long_alignment = reg_msg.long_alignment; | |
2518 | memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); | |
6a359b8a MD |
2519 | if (reg_msg.major < LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE || |
2520 | reg_msg.major > LTTNG_UST_ABI_MAJOR_VERSION) { | |
32ce8569 MD |
2521 | return -LTTNG_UST_ERR_UNSUP_MAJOR; |
2522 | } | |
a834901f | 2523 | return get_cred(sock, ®_msg, pid, ppid, uid, gid); |
32ce8569 MD |
2524 | } |
2525 | ||
249cffb5 | 2526 | int lttng_ust_ctl_recv_notify(int sock, enum lttng_ust_ctl_notify_cmd *notify_cmd) |
32ce8569 MD |
2527 | { |
2528 | struct ustcomm_notify_hdr header; | |
2529 | ssize_t len; | |
2530 | ||
2531 | len = ustcomm_recv_unix_sock(sock, &header, sizeof(header)); | |
2532 | if (len > 0 && len != sizeof(header)) | |
2533 | return -EIO; | |
2534 | if (len == 0) | |
2535 | return -EPIPE; | |
2536 | if (len < 0) | |
2537 | return len; | |
2538 | switch (header.notify_cmd) { | |
2539 | case 0: | |
249cffb5 | 2540 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
32ce8569 MD |
2541 | break; |
2542 | case 1: | |
249cffb5 | 2543 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
32ce8569 | 2544 | break; |
c785c634 | 2545 | case 2: |
249cffb5 | 2546 | *notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
c785c634 | 2547 | break; |
32ce8569 MD |
2548 | default: |
2549 | return -EINVAL; | |
2550 | } | |
2551 | return 0; | |
2552 | } | |
2553 | ||
2554 | /* | |
2555 | * Returns 0 on success, negative error value on error. | |
2556 | */ | |
249cffb5 | 2557 | int lttng_ust_ctl_recv_register_event(int sock, |
32ce8569 MD |
2558 | int *session_objd, |
2559 | int *channel_objd, | |
2560 | char *event_name, | |
2561 | int *loglevel, | |
2562 | char **signature, | |
2563 | size_t *nr_fields, | |
249cffb5 | 2564 | struct lttng_ust_ctl_field **fields, |
32ce8569 MD |
2565 | char **model_emf_uri) |
2566 | { | |
2567 | ssize_t len; | |
2568 | struct ustcomm_notify_event_msg msg; | |
2569 | size_t signature_len, fields_len, model_emf_uri_len; | |
2570 | char *a_sign = NULL, *a_model_emf_uri = NULL; | |
249cffb5 | 2571 | struct lttng_ust_ctl_field *a_fields = NULL; |
32ce8569 MD |
2572 | |
2573 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2574 | if (len > 0 && len != sizeof(msg)) | |
2575 | return -EIO; | |
2576 | if (len == 0) | |
2577 | return -EPIPE; | |
2578 | if (len < 0) | |
2579 | return len; | |
2580 | ||
2581 | *session_objd = msg.session_objd; | |
2582 | *channel_objd = msg.channel_objd; | |
fd17d7ce MD |
2583 | strncpy(event_name, msg.event_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
2584 | event_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
32ce8569 MD |
2585 | *loglevel = msg.loglevel; |
2586 | signature_len = msg.signature_len; | |
2587 | fields_len = msg.fields_len; | |
2588 | ||
2589 | if (fields_len % sizeof(*a_fields) != 0) { | |
2590 | return -EINVAL; | |
2591 | } | |
2592 | ||
2593 | model_emf_uri_len = msg.model_emf_uri_len; | |
2594 | ||
2595 | /* recv signature. contains at least \0. */ | |
2596 | a_sign = zmalloc(signature_len); | |
2597 | if (!a_sign) | |
2598 | return -ENOMEM; | |
2599 | len = ustcomm_recv_unix_sock(sock, a_sign, signature_len); | |
2600 | if (len > 0 && len != signature_len) { | |
2601 | len = -EIO; | |
2602 | goto signature_error; | |
2603 | } | |
2604 | if (len == 0) { | |
2605 | len = -EPIPE; | |
2606 | goto signature_error; | |
2607 | } | |
2608 | if (len < 0) { | |
2609 | goto signature_error; | |
2610 | } | |
2611 | /* Enforce end of string */ | |
111198c2 | 2612 | a_sign[signature_len - 1] = '\0'; |
32ce8569 MD |
2613 | |
2614 | /* recv fields */ | |
2615 | if (fields_len) { | |
2616 | a_fields = zmalloc(fields_len); | |
2617 | if (!a_fields) { | |
2618 | len = -ENOMEM; | |
2619 | goto signature_error; | |
2620 | } | |
2621 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2622 | if (len > 0 && len != fields_len) { | |
2623 | len = -EIO; | |
2624 | goto fields_error; | |
2625 | } | |
2626 | if (len == 0) { | |
2627 | len = -EPIPE; | |
2628 | goto fields_error; | |
2629 | } | |
2630 | if (len < 0) { | |
2631 | goto fields_error; | |
2632 | } | |
2633 | } | |
2634 | ||
2635 | if (model_emf_uri_len) { | |
2636 | /* recv model_emf_uri_len */ | |
2637 | a_model_emf_uri = zmalloc(model_emf_uri_len); | |
2638 | if (!a_model_emf_uri) { | |
2639 | len = -ENOMEM; | |
2640 | goto fields_error; | |
2641 | } | |
2642 | len = ustcomm_recv_unix_sock(sock, a_model_emf_uri, | |
2643 | model_emf_uri_len); | |
2644 | if (len > 0 && len != model_emf_uri_len) { | |
2645 | len = -EIO; | |
2646 | goto model_error; | |
2647 | } | |
2648 | if (len == 0) { | |
2649 | len = -EPIPE; | |
2650 | goto model_error; | |
2651 | } | |
2652 | if (len < 0) { | |
2653 | goto model_error; | |
2654 | } | |
2655 | /* Enforce end of string */ | |
2656 | a_model_emf_uri[model_emf_uri_len - 1] = '\0'; | |
2657 | } | |
2658 | ||
2659 | *signature = a_sign; | |
2660 | *nr_fields = fields_len / sizeof(*a_fields); | |
2661 | *fields = a_fields; | |
2662 | *model_emf_uri = a_model_emf_uri; | |
2663 | ||
2664 | return 0; | |
2665 | ||
2666 | model_error: | |
2667 | free(a_model_emf_uri); | |
2668 | fields_error: | |
2669 | free(a_fields); | |
2670 | signature_error: | |
2671 | free(a_sign); | |
2672 | return len; | |
2673 | } | |
2674 | ||
2675 | /* | |
2676 | * Returns 0 on success, negative error value on error. | |
2677 | */ | |
249cffb5 | 2678 | int lttng_ust_ctl_reply_register_event(int sock, |
32ce8569 MD |
2679 | uint32_t id, |
2680 | int ret_code) | |
2681 | { | |
2682 | ssize_t len; | |
2683 | struct { | |
2684 | struct ustcomm_notify_hdr header; | |
2685 | struct ustcomm_notify_event_reply r; | |
2686 | } reply; | |
2687 | ||
2688 | memset(&reply, 0, sizeof(reply)); | |
249cffb5 | 2689 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
32ce8569 MD |
2690 | reply.r.ret_code = ret_code; |
2691 | reply.r.event_id = id; | |
2692 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2693 | if (len > 0 && len != sizeof(reply)) | |
2694 | return -EIO; | |
2695 | if (len < 0) | |
2696 | return len; | |
2697 | return 0; | |
2698 | } | |
2699 | ||
c785c634 MD |
2700 | /* |
2701 | * Returns 0 on success, negative UST or system error value on error. | |
2702 | */ | |
249cffb5 | 2703 | int lttng_ust_ctl_recv_register_enum(int sock, |
c785c634 MD |
2704 | int *session_objd, |
2705 | char *enum_name, | |
249cffb5 | 2706 | struct lttng_ust_ctl_enum_entry **entries, |
c785c634 MD |
2707 | size_t *nr_entries) |
2708 | { | |
2709 | ssize_t len; | |
2710 | struct ustcomm_notify_enum_msg msg; | |
2711 | size_t entries_len; | |
249cffb5 | 2712 | struct lttng_ust_ctl_enum_entry *a_entries = NULL; |
c785c634 MD |
2713 | |
2714 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2715 | if (len > 0 && len != sizeof(msg)) | |
2716 | return -EIO; | |
2717 | if (len == 0) | |
2718 | return -EPIPE; | |
2719 | if (len < 0) | |
2720 | return len; | |
2721 | ||
2722 | *session_objd = msg.session_objd; | |
fd17d7ce MD |
2723 | strncpy(enum_name, msg.enum_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
2724 | enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
c785c634 MD |
2725 | entries_len = msg.entries_len; |
2726 | ||
2727 | if (entries_len % sizeof(*a_entries) != 0) { | |
2728 | return -EINVAL; | |
2729 | } | |
2730 | ||
2731 | /* recv entries */ | |
2732 | if (entries_len) { | |
2733 | a_entries = zmalloc(entries_len); | |
2734 | if (!a_entries) | |
2735 | return -ENOMEM; | |
2736 | len = ustcomm_recv_unix_sock(sock, a_entries, entries_len); | |
2737 | if (len > 0 && len != entries_len) { | |
2738 | len = -EIO; | |
2739 | goto entries_error; | |
2740 | } | |
2741 | if (len == 0) { | |
2742 | len = -EPIPE; | |
2743 | goto entries_error; | |
2744 | } | |
2745 | if (len < 0) { | |
2746 | goto entries_error; | |
2747 | } | |
2748 | } | |
2749 | *nr_entries = entries_len / sizeof(*a_entries); | |
2750 | *entries = a_entries; | |
2751 | ||
2752 | return 0; | |
2753 | ||
2754 | entries_error: | |
2755 | free(a_entries); | |
2756 | return len; | |
2757 | } | |
2758 | ||
2759 | /* | |
2760 | * Returns 0 on success, negative error value on error. | |
2761 | */ | |
249cffb5 | 2762 | int lttng_ust_ctl_reply_register_enum(int sock, |
c785c634 MD |
2763 | uint64_t id, |
2764 | int ret_code) | |
2765 | { | |
2766 | ssize_t len; | |
2767 | struct { | |
2768 | struct ustcomm_notify_hdr header; | |
2769 | struct ustcomm_notify_enum_reply r; | |
2770 | } reply; | |
2771 | ||
2772 | memset(&reply, 0, sizeof(reply)); | |
249cffb5 | 2773 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
c785c634 MD |
2774 | reply.r.ret_code = ret_code; |
2775 | reply.r.enum_id = id; | |
2776 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2777 | if (len > 0 && len != sizeof(reply)) | |
2778 | return -EIO; | |
2779 | if (len < 0) | |
2780 | return len; | |
2781 | return 0; | |
2782 | } | |
2783 | ||
32ce8569 MD |
2784 | /* |
2785 | * Returns 0 on success, negative UST or system error value on error. | |
2786 | */ | |
249cffb5 | 2787 | int lttng_ust_ctl_recv_register_channel(int sock, |
32ce8569 MD |
2788 | int *session_objd, /* session descriptor (output) */ |
2789 | int *channel_objd, /* channel descriptor (output) */ | |
2790 | size_t *nr_fields, | |
249cffb5 | 2791 | struct lttng_ust_ctl_field **fields) |
32ce8569 MD |
2792 | { |
2793 | ssize_t len; | |
2794 | struct ustcomm_notify_channel_msg msg; | |
2795 | size_t fields_len; | |
249cffb5 | 2796 | struct lttng_ust_ctl_field *a_fields; |
32ce8569 MD |
2797 | |
2798 | len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
2799 | if (len > 0 && len != sizeof(msg)) | |
2800 | return -EIO; | |
2801 | if (len == 0) | |
2802 | return -EPIPE; | |
2803 | if (len < 0) | |
2804 | return len; | |
2805 | ||
2806 | *session_objd = msg.session_objd; | |
2807 | *channel_objd = msg.channel_objd; | |
2808 | fields_len = msg.ctx_fields_len; | |
2809 | ||
2810 | if (fields_len % sizeof(*a_fields) != 0) { | |
2811 | return -EINVAL; | |
2812 | } | |
2813 | ||
2814 | /* recv fields */ | |
2815 | if (fields_len) { | |
2816 | a_fields = zmalloc(fields_len); | |
2817 | if (!a_fields) { | |
2818 | len = -ENOMEM; | |
2819 | goto alloc_error; | |
2820 | } | |
2821 | len = ustcomm_recv_unix_sock(sock, a_fields, fields_len); | |
2822 | if (len > 0 && len != fields_len) { | |
2823 | len = -EIO; | |
2824 | goto fields_error; | |
2825 | } | |
2826 | if (len == 0) { | |
2827 | len = -EPIPE; | |
2828 | goto fields_error; | |
2829 | } | |
2830 | if (len < 0) { | |
2831 | goto fields_error; | |
2832 | } | |
2833 | *fields = a_fields; | |
2834 | } else { | |
2835 | *fields = NULL; | |
2836 | } | |
2837 | *nr_fields = fields_len / sizeof(*a_fields); | |
2838 | return 0; | |
2839 | ||
2840 | fields_error: | |
2841 | free(a_fields); | |
2842 | alloc_error: | |
2843 | return len; | |
2844 | } | |
2845 | ||
2846 | /* | |
2847 | * Returns 0 on success, negative error value on error. | |
2848 | */ | |
249cffb5 | 2849 | int lttng_ust_ctl_reply_register_channel(int sock, |
32ce8569 | 2850 | uint32_t chan_id, |
249cffb5 | 2851 | enum lttng_ust_ctl_channel_header header_type, |
32ce8569 MD |
2852 | int ret_code) |
2853 | { | |
2854 | ssize_t len; | |
2855 | struct { | |
2856 | struct ustcomm_notify_hdr header; | |
2857 | struct ustcomm_notify_channel_reply r; | |
2858 | } reply; | |
2859 | ||
2860 | memset(&reply, 0, sizeof(reply)); | |
249cffb5 | 2861 | reply.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
32ce8569 MD |
2862 | reply.r.ret_code = ret_code; |
2863 | reply.r.chan_id = chan_id; | |
2864 | switch (header_type) { | |
249cffb5 | 2865 | case LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT: |
32ce8569 MD |
2866 | reply.r.header_type = 1; |
2867 | break; | |
249cffb5 | 2868 | case LTTNG_UST_CTL_CHANNEL_HEADER_LARGE: |
32ce8569 MD |
2869 | reply.r.header_type = 2; |
2870 | break; | |
2871 | default: | |
2872 | reply.r.header_type = 0; | |
2873 | break; | |
2874 | } | |
2875 | len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2876 | if (len > 0 && len != sizeof(reply)) | |
2877 | return -EIO; | |
2878 | if (len < 0) | |
2879 | return len; | |
2880 | return 0; | |
2881 | } | |
2882 | ||
f53329f3 | 2883 | /* Regenerate the statedump. */ |
249cffb5 | 2884 | int lttng_ust_ctl_regenerate_statedump(int sock, int handle) |
f53329f3 JD |
2885 | { |
2886 | struct ustcomm_ust_msg lum; | |
2887 | struct ustcomm_ust_reply lur; | |
2888 | int ret; | |
2889 | ||
2890 | memset(&lum, 0, sizeof(lum)); | |
2891 | lum.handle = handle; | |
fd17d7ce | 2892 | lum.cmd = LTTNG_UST_ABI_SESSION_STATEDUMP; |
f53329f3 JD |
2893 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
2894 | if (ret) | |
2895 | return ret; | |
2896 | DBG("Regenerated statedump for handle %u", handle); | |
2897 | return 0; | |
2898 | } | |
2899 | ||
ebabbf58 MD |
2900 | /* counter operations */ |
2901 | ||
249cffb5 | 2902 | int lttng_ust_ctl_get_nr_cpu_per_counter(void) |
ebabbf58 | 2903 | { |
74cc1f59 | 2904 | return num_possible_cpus(); |
ebabbf58 MD |
2905 | } |
2906 | ||
249cffb5 MJ |
2907 | struct lttng_ust_ctl_daemon_counter * |
2908 | lttng_ust_ctl_create_counter(size_t nr_dimensions, | |
2909 | const struct lttng_ust_ctl_counter_dimension *dimensions, | |
ebabbf58 MD |
2910 | int64_t global_sum_step, |
2911 | int global_counter_fd, | |
2912 | int nr_counter_cpu_fds, | |
2913 | const int *counter_cpu_fds, | |
249cffb5 MJ |
2914 | enum lttng_ust_ctl_counter_bitness bitness, |
2915 | enum lttng_ust_ctl_counter_arithmetic arithmetic, | |
81bc4972 MD |
2916 | uint32_t alloc_flags, |
2917 | bool coalesce_hits) | |
ebabbf58 MD |
2918 | { |
2919 | const char *transport_name; | |
249cffb5 | 2920 | struct lttng_ust_ctl_daemon_counter *counter; |
ebabbf58 MD |
2921 | struct lttng_counter_transport *transport; |
2922 | struct lttng_counter_dimension ust_dim[LTTNG_COUNTER_DIMENSION_MAX]; | |
2923 | size_t i; | |
2924 | ||
2925 | if (nr_dimensions > LTTNG_COUNTER_DIMENSION_MAX) | |
2926 | return NULL; | |
2927 | /* Currently, only per-cpu allocation is supported. */ | |
2928 | switch (alloc_flags) { | |
249cffb5 | 2929 | case LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU: |
ebabbf58 MD |
2930 | break; |
2931 | ||
249cffb5 MJ |
2932 | case LTTNG_UST_CTL_COUNTER_ALLOC_PER_CPU | LTTNG_UST_CTL_COUNTER_ALLOC_GLOBAL: |
2933 | case LTTNG_UST_CTL_COUNTER_ALLOC_GLOBAL: | |
ebabbf58 MD |
2934 | default: |
2935 | return NULL; | |
2936 | } | |
2937 | switch (bitness) { | |
249cffb5 | 2938 | case LTTNG_UST_CTL_COUNTER_BITNESS_32: |
ebabbf58 | 2939 | switch (arithmetic) { |
249cffb5 | 2940 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
ebabbf58 MD |
2941 | transport_name = "counter-per-cpu-32-modular"; |
2942 | break; | |
249cffb5 | 2943 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
ebabbf58 MD |
2944 | transport_name = "counter-per-cpu-32-saturation"; |
2945 | break; | |
2946 | default: | |
2947 | return NULL; | |
2948 | } | |
2949 | break; | |
249cffb5 | 2950 | case LTTNG_UST_CTL_COUNTER_BITNESS_64: |
ebabbf58 | 2951 | switch (arithmetic) { |
249cffb5 | 2952 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
ebabbf58 MD |
2953 | transport_name = "counter-per-cpu-64-modular"; |
2954 | break; | |
249cffb5 | 2955 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
ebabbf58 MD |
2956 | transport_name = "counter-per-cpu-64-saturation"; |
2957 | break; | |
2958 | default: | |
2959 | return NULL; | |
2960 | } | |
2961 | break; | |
2962 | default: | |
2963 | return NULL; | |
2964 | } | |
2965 | ||
2966 | transport = lttng_counter_transport_find(transport_name); | |
2967 | if (!transport) { | |
2968 | DBG("LTTng transport %s not found\n", | |
2969 | transport_name); | |
2970 | return NULL; | |
2971 | } | |
2972 | ||
2973 | counter = zmalloc(sizeof(*counter)); | |
2974 | if (!counter) | |
2975 | return NULL; | |
2976 | counter->attr = zmalloc(sizeof(*counter->attr)); | |
2977 | if (!counter->attr) | |
2978 | goto free_counter; | |
2979 | counter->attr->bitness = bitness; | |
2980 | counter->attr->arithmetic = arithmetic; | |
2981 | counter->attr->nr_dimensions = nr_dimensions; | |
2982 | counter->attr->global_sum_step = global_sum_step; | |
81bc4972 | 2983 | counter->attr->coalesce_hits = coalesce_hits; |
ebabbf58 MD |
2984 | for (i = 0; i < nr_dimensions; i++) |
2985 | counter->attr->dimensions[i] = dimensions[i]; | |
2986 | ||
2987 | for (i = 0; i < nr_dimensions; i++) { | |
2988 | ust_dim[i].size = dimensions[i].size; | |
2989 | ust_dim[i].underflow_index = dimensions[i].underflow_index; | |
2990 | ust_dim[i].overflow_index = dimensions[i].overflow_index; | |
2991 | ust_dim[i].has_underflow = dimensions[i].has_underflow; | |
2992 | ust_dim[i].has_overflow = dimensions[i].has_overflow; | |
2993 | } | |
2994 | counter->counter = transport->ops.counter_create(nr_dimensions, | |
2995 | ust_dim, global_sum_step, global_counter_fd, | |
2996 | nr_counter_cpu_fds, counter_cpu_fds, true); | |
2997 | if (!counter->counter) | |
2998 | goto free_attr; | |
2999 | counter->ops = &transport->ops; | |
3000 | return counter; | |
3001 | ||
3002 | free_attr: | |
3003 | free(counter->attr); | |
3004 | free_counter: | |
3005 | free(counter); | |
3006 | return NULL; | |
3007 | } | |
3008 | ||
249cffb5 | 3009 | int lttng_ust_ctl_create_counter_data(struct lttng_ust_ctl_daemon_counter *counter, |
fd17d7ce | 3010 | struct lttng_ust_abi_object_data **_counter_data) |
ebabbf58 | 3011 | { |
fd17d7ce MD |
3012 | struct lttng_ust_abi_object_data *counter_data; |
3013 | struct lttng_ust_abi_counter_conf counter_conf = {0}; | |
ebabbf58 MD |
3014 | size_t i; |
3015 | int ret; | |
3016 | ||
3017 | switch (counter->attr->arithmetic) { | |
249cffb5 | 3018 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_MODULAR: |
fd17d7ce | 3019 | counter_conf.arithmetic = LTTNG_UST_ABI_COUNTER_ARITHMETIC_MODULAR; |
ebabbf58 | 3020 | break; |
249cffb5 | 3021 | case LTTNG_UST_CTL_COUNTER_ARITHMETIC_SATURATION: |
fd17d7ce | 3022 | counter_conf.arithmetic = LTTNG_UST_ABI_COUNTER_ARITHMETIC_SATURATION; |
ebabbf58 MD |
3023 | break; |
3024 | default: | |
3025 | return -EINVAL; | |
3026 | } | |
3027 | switch (counter->attr->bitness) { | |
249cffb5 | 3028 | case LTTNG_UST_CTL_COUNTER_BITNESS_32: |
fd17d7ce | 3029 | counter_conf.bitness = LTTNG_UST_ABI_COUNTER_BITNESS_32; |
ebabbf58 | 3030 | break; |
249cffb5 | 3031 | case LTTNG_UST_CTL_COUNTER_BITNESS_64: |
fd17d7ce | 3032 | counter_conf.bitness = LTTNG_UST_ABI_COUNTER_BITNESS_64; |
ebabbf58 MD |
3033 | break; |
3034 | default: | |
3035 | return -EINVAL; | |
3036 | } | |
3037 | counter_conf.number_dimensions = counter->attr->nr_dimensions; | |
3038 | counter_conf.global_sum_step = counter->attr->global_sum_step; | |
81bc4972 | 3039 | counter_conf.coalesce_hits = counter->attr->coalesce_hits; |
ebabbf58 MD |
3040 | for (i = 0; i < counter->attr->nr_dimensions; i++) { |
3041 | counter_conf.dimensions[i].size = counter->attr->dimensions[i].size; | |
3042 | counter_conf.dimensions[i].underflow_index = counter->attr->dimensions[i].underflow_index; | |
3043 | counter_conf.dimensions[i].overflow_index = counter->attr->dimensions[i].overflow_index; | |
3044 | counter_conf.dimensions[i].has_underflow = counter->attr->dimensions[i].has_underflow; | |
3045 | counter_conf.dimensions[i].has_overflow = counter->attr->dimensions[i].has_overflow; | |
3046 | } | |
3047 | ||
3048 | counter_data = zmalloc(sizeof(*counter_data)); | |
3049 | if (!counter_data) { | |
3050 | ret = -ENOMEM; | |
3051 | goto error_alloc; | |
3052 | } | |
fd17d7ce | 3053 | counter_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER; |
ebabbf58 MD |
3054 | counter_data->handle = -1; |
3055 | ||
3056 | counter_data->size = sizeof(counter_conf); | |
3057 | counter_data->u.counter.data = zmalloc(sizeof(counter_conf)); | |
3058 | if (!counter_data->u.counter.data) { | |
3059 | ret = -ENOMEM; | |
3060 | goto error_alloc_data; | |
3061 | } | |
3062 | ||
3063 | memcpy(counter_data->u.counter.data, &counter_conf, sizeof(counter_conf)); | |
3064 | *_counter_data = counter_data; | |
3065 | ||
3066 | return 0; | |
3067 | ||
3068 | error_alloc_data: | |
3069 | free(counter_data); | |
3070 | error_alloc: | |
3071 | return ret; | |
3072 | } | |
3073 | ||
249cffb5 | 3074 | int lttng_ust_ctl_create_counter_global_data(struct lttng_ust_ctl_daemon_counter *counter, |
fd17d7ce | 3075 | struct lttng_ust_abi_object_data **_counter_global_data) |
ebabbf58 | 3076 | { |
fd17d7ce | 3077 | struct lttng_ust_abi_object_data *counter_global_data; |
ebabbf58 MD |
3078 | int ret, fd; |
3079 | size_t len; | |
3080 | ||
3081 | if (lttng_counter_get_global_shm(counter->counter, &fd, &len)) | |
3082 | return -EINVAL; | |
3083 | counter_global_data = zmalloc(sizeof(*counter_global_data)); | |
3084 | if (!counter_global_data) { | |
3085 | ret = -ENOMEM; | |
3086 | goto error_alloc; | |
3087 | } | |
fd17d7ce | 3088 | counter_global_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_GLOBAL; |
ebabbf58 MD |
3089 | counter_global_data->handle = -1; |
3090 | counter_global_data->size = len; | |
3091 | counter_global_data->u.counter_global.shm_fd = fd; | |
3092 | *_counter_global_data = counter_global_data; | |
3093 | return 0; | |
3094 | ||
3095 | error_alloc: | |
3096 | return ret; | |
3097 | } | |
3098 | ||
249cffb5 | 3099 | int lttng_ust_ctl_create_counter_cpu_data(struct lttng_ust_ctl_daemon_counter *counter, int cpu, |
fd17d7ce | 3100 | struct lttng_ust_abi_object_data **_counter_cpu_data) |
ebabbf58 | 3101 | { |
fd17d7ce | 3102 | struct lttng_ust_abi_object_data *counter_cpu_data; |
ebabbf58 MD |
3103 | int ret, fd; |
3104 | size_t len; | |
3105 | ||
3106 | if (lttng_counter_get_cpu_shm(counter->counter, cpu, &fd, &len)) | |
3107 | return -EINVAL; | |
3108 | counter_cpu_data = zmalloc(sizeof(*counter_cpu_data)); | |
3109 | if (!counter_cpu_data) { | |
3110 | ret = -ENOMEM; | |
3111 | goto error_alloc; | |
3112 | } | |
fd17d7ce | 3113 | counter_cpu_data->type = LTTNG_UST_ABI_OBJECT_TYPE_COUNTER_CPU; |
ebabbf58 MD |
3114 | counter_cpu_data->handle = -1; |
3115 | counter_cpu_data->size = len; | |
3116 | counter_cpu_data->u.counter_cpu.shm_fd = fd; | |
3117 | counter_cpu_data->u.counter_cpu.cpu_nr = cpu; | |
3118 | *_counter_cpu_data = counter_cpu_data; | |
3119 | return 0; | |
3120 | ||
3121 | error_alloc: | |
3122 | return ret; | |
3123 | } | |
3124 | ||
249cffb5 | 3125 | void lttng_ust_ctl_destroy_counter(struct lttng_ust_ctl_daemon_counter *counter) |
ebabbf58 MD |
3126 | { |
3127 | counter->ops->counter_destroy(counter->counter); | |
3128 | free(counter->attr); | |
3129 | free(counter); | |
3130 | } | |
3131 | ||
662d0590 MD |
3132 | /* |
3133 | * Protocol for LTTNG_UST_ABI_COUNTER command: | |
3134 | * | |
3135 | * - send: struct ustcomm_ust_msg | |
3136 | * - receive: struct ustcomm_ust_reply | |
3137 | * - send: counter data | |
3138 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
3139 | */ | |
249cffb5 | 3140 | int lttng_ust_ctl_send_counter_data_to_ust(int sock, int parent_handle, |
fd17d7ce | 3141 | struct lttng_ust_abi_object_data *counter_data) |
ebabbf58 MD |
3142 | { |
3143 | struct ustcomm_ust_msg lum; | |
3144 | struct ustcomm_ust_reply lur; | |
3145 | int ret; | |
3146 | size_t size; | |
3147 | ssize_t len; | |
3148 | ||
3149 | if (!counter_data) | |
3150 | return -EINVAL; | |
3151 | ||
3152 | size = counter_data->size; | |
3153 | memset(&lum, 0, sizeof(lum)); | |
3154 | lum.handle = parent_handle; | |
fd17d7ce | 3155 | lum.cmd = LTTNG_UST_ABI_COUNTER; |
ebabbf58 | 3156 | lum.u.counter.len = size; |
662d0590 | 3157 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
ebabbf58 MD |
3158 | if (ret) |
3159 | return ret; | |
3160 | ||
3161 | /* Send counter data */ | |
3162 | len = ustcomm_send_unix_sock(sock, counter_data->u.counter.data, size); | |
3163 | if (len != size) { | |
3164 | if (len < 0) | |
3165 | return len; | |
3166 | else | |
3167 | return -EIO; | |
3168 | } | |
3169 | ||
3170 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
3171 | if (!ret) { | |
3172 | counter_data->handle = lur.ret_val; | |
3173 | } | |
3174 | return ret; | |
3175 | } | |
3176 | ||
662d0590 MD |
3177 | /* |
3178 | * Protocol for LTTNG_UST_ABI_COUNTER_GLOBAL command: | |
3179 | * | |
3180 | * - send: struct ustcomm_ust_msg | |
3181 | * - receive: struct ustcomm_ust_reply | |
3182 | * - send: file descriptor | |
3183 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
3184 | */ | |
249cffb5 | 3185 | int lttng_ust_ctl_send_counter_global_data_to_ust(int sock, |
fd17d7ce MD |
3186 | struct lttng_ust_abi_object_data *counter_data, |
3187 | struct lttng_ust_abi_object_data *counter_global_data) | |
ebabbf58 MD |
3188 | { |
3189 | struct ustcomm_ust_msg lum; | |
3190 | struct ustcomm_ust_reply lur; | |
3191 | int ret, shm_fd[1]; | |
3192 | size_t size; | |
3193 | ssize_t len; | |
3194 | ||
3195 | if (!counter_data || !counter_global_data) | |
3196 | return -EINVAL; | |
3197 | ||
3198 | size = counter_global_data->size; | |
3199 | memset(&lum, 0, sizeof(lum)); | |
3200 | lum.handle = counter_data->handle; /* parent handle */ | |
fd17d7ce | 3201 | lum.cmd = LTTNG_UST_ABI_COUNTER_GLOBAL; |
ebabbf58 | 3202 | lum.u.counter_global.len = size; |
662d0590 | 3203 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
ebabbf58 MD |
3204 | if (ret) |
3205 | return ret; | |
3206 | ||
3207 | shm_fd[0] = counter_global_data->u.counter_global.shm_fd; | |
3208 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); | |
3209 | if (len <= 0) { | |
3210 | if (len < 0) | |
3211 | return len; | |
3212 | else | |
3213 | return -EIO; | |
3214 | } | |
3215 | ||
3216 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
3217 | if (!ret) { | |
3218 | counter_global_data->handle = lur.ret_val; | |
3219 | } | |
3220 | return ret; | |
3221 | } | |
3222 | ||
662d0590 MD |
3223 | /* |
3224 | * Protocol for LTTNG_UST_ABI_COUNTER_CPU command: | |
3225 | * | |
3226 | * - send: struct ustcomm_ust_msg | |
3227 | * - receive: struct ustcomm_ust_reply | |
3228 | * - send: file descriptor | |
3229 | * - receive: struct ustcomm_ust_reply (actual command return code) | |
3230 | */ | |
249cffb5 | 3231 | int lttng_ust_ctl_send_counter_cpu_data_to_ust(int sock, |
fd17d7ce MD |
3232 | struct lttng_ust_abi_object_data *counter_data, |
3233 | struct lttng_ust_abi_object_data *counter_cpu_data) | |
ebabbf58 MD |
3234 | { |
3235 | struct ustcomm_ust_msg lum; | |
3236 | struct ustcomm_ust_reply lur; | |
3237 | int ret, shm_fd[1]; | |
3238 | size_t size; | |
3239 | ssize_t len; | |
3240 | ||
3241 | if (!counter_data || !counter_cpu_data) | |
3242 | return -EINVAL; | |
3243 | ||
3244 | size = counter_cpu_data->size; | |
3245 | memset(&lum, 0, sizeof(lum)); | |
3246 | lum.handle = counter_data->handle; /* parent handle */ | |
fd17d7ce | 3247 | lum.cmd = LTTNG_UST_ABI_COUNTER_CPU; |
ebabbf58 MD |
3248 | lum.u.counter_cpu.len = size; |
3249 | lum.u.counter_cpu.cpu_nr = counter_cpu_data->u.counter_cpu.cpu_nr; | |
662d0590 | 3250 | ret = ustcomm_send_app_cmd(sock, &lum, &lur); |
ebabbf58 MD |
3251 | if (ret) |
3252 | return ret; | |
3253 | ||
3254 | shm_fd[0] = counter_cpu_data->u.counter_global.shm_fd; | |
3255 | len = ustcomm_send_fds_unix_sock(sock, shm_fd, 1); | |
3256 | if (len <= 0) { | |
3257 | if (len < 0) | |
3258 | return len; | |
3259 | else | |
3260 | return -EIO; | |
3261 | } | |
3262 | ||
3263 | ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd); | |
3264 | if (!ret) { | |
3265 | counter_cpu_data->handle = lur.ret_val; | |
3266 | } | |
3267 | return ret; | |
3268 | } | |
3269 | ||
249cffb5 | 3270 | int lttng_ust_ctl_counter_read(struct lttng_ust_ctl_daemon_counter *counter, |
ebabbf58 MD |
3271 | const size_t *dimension_indexes, |
3272 | int cpu, int64_t *value, | |
3273 | bool *overflow, bool *underflow) | |
3274 | { | |
3275 | return counter->ops->counter_read(counter->counter, dimension_indexes, cpu, | |
3276 | value, overflow, underflow); | |
3277 | } | |
3278 | ||
249cffb5 | 3279 | int lttng_ust_ctl_counter_aggregate(struct lttng_ust_ctl_daemon_counter *counter, |
ebabbf58 MD |
3280 | const size_t *dimension_indexes, |
3281 | int64_t *value, | |
3282 | bool *overflow, bool *underflow) | |
3283 | { | |
3284 | return counter->ops->counter_aggregate(counter->counter, dimension_indexes, | |
3285 | value, overflow, underflow); | |
3286 | } | |
3287 | ||
249cffb5 | 3288 | int lttng_ust_ctl_counter_clear(struct lttng_ust_ctl_daemon_counter *counter, |
ebabbf58 MD |
3289 | const size_t *dimension_indexes) |
3290 | { | |
3291 | return counter->ops->counter_clear(counter->counter, dimension_indexes); | |
3292 | } | |
3293 | ||
465a0d04 | 3294 | static |
fca97dfd | 3295 | void lttng_ust_ctl_ctor(void) |
465a0d04 MJ |
3296 | __attribute__((constructor)); |
3297 | static | |
fca97dfd | 3298 | void lttng_ust_ctl_ctor(void) |
74d81a6c | 3299 | { |
fca97dfd MJ |
3300 | /* |
3301 | * Call the liblttng-ust-common constructor to ensure it runs first. | |
3302 | */ | |
3303 | lttng_ust_common_ctor(); | |
3304 | ||
14e0a135 MD |
3305 | lttng_ust_ring_buffer_clients_init(); |
3306 | lttng_ust_counter_clients_init(); | |
03d2d293 | 3307 | lib_ringbuffer_signal_init(); |
74d81a6c MD |
3308 | } |
3309 | ||
c589eca2 | 3310 | static |
249cffb5 | 3311 | void lttng_ust_ctl_exit(void) |
c589eca2 MJ |
3312 | __attribute__((destructor)); |
3313 | static | |
249cffb5 | 3314 | void lttng_ust_ctl_exit(void) |
74d81a6c | 3315 | { |
14e0a135 MD |
3316 | lttng_ust_counter_clients_exit(); |
3317 | lttng_ust_ring_buffer_clients_exit(); | |
57773204 | 3318 | } |