Commit | Line | Data |
---|---|---|
54012638 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
54012638 DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
54012638 DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
54012638 DG |
19 | #include <stdio.h> |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
c363b55d | 22 | #include <unistd.h> |
54012638 | 23 | |
990570ed DG |
24 | #include <common/common.h> |
25 | #include <common/defaults.h> | |
1e307fab | 26 | |
00e2e675 | 27 | #include "consumer.h" |
62499ad6 | 28 | #include "trace-kernel.h" |
54012638 | 29 | |
19e70852 | 30 | /* |
050349bb | 31 | * Find the channel name for the given kernel session. |
19e70852 | 32 | */ |
62499ad6 | 33 | struct ltt_kernel_channel *trace_kernel_get_channel_by_name( |
19e70852 DG |
34 | char *name, struct ltt_kernel_session *session) |
35 | { | |
36 | struct ltt_kernel_channel *chan; | |
37 | ||
0525e9ae DG |
38 | assert(session); |
39 | assert(name); | |
19e70852 | 40 | |
85076754 MD |
41 | /* |
42 | * If we receive an empty string for channel name, it means the | |
43 | * default channel name is requested. | |
44 | */ | |
45 | if (name[0] == '\0') | |
46 | name = DEFAULT_CHANNEL_NAME; | |
47 | ||
54d01ffb DG |
48 | DBG("Trying to find channel %s", name); |
49 | ||
19e70852 DG |
50 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
51 | if (strcmp(name, chan->channel->name) == 0) { | |
52 | DBG("Found channel by name %s", name); | |
53 | return chan; | |
54 | } | |
55 | } | |
56 | ||
19e70852 DG |
57 | return NULL; |
58 | } | |
59 | ||
00a62084 MD |
60 | /* |
61 | * Find the event for the given channel. | |
62 | */ | |
63 | struct ltt_kernel_event *trace_kernel_find_event( | |
64 | char *name, struct ltt_kernel_channel *channel, | |
65 | enum lttng_event_type type, | |
66 | struct lttng_filter_bytecode *filter) | |
67 | { | |
68 | struct ltt_kernel_event *ev; | |
69 | int found = 0; | |
70 | ||
71 | assert(name); | |
72 | assert(channel); | |
73 | ||
74 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
75 | if (type != LTTNG_EVENT_ALL && ev->type != type) { | |
76 | continue; | |
77 | } | |
78 | if (strcmp(name, ev->event->name)) { | |
79 | continue; | |
80 | } | |
81 | if ((ev->filter && !filter) || (!ev->filter && filter)) { | |
82 | continue; | |
83 | } | |
84 | if (ev->filter && filter) { | |
85 | if (ev->filter->len != filter->len || | |
86 | memcmp(ev->filter->data, filter->data, | |
87 | filter->len) != 0) { | |
88 | continue; | |
89 | } | |
90 | } | |
91 | found = 1; | |
92 | break; | |
93 | } | |
94 | if (found) { | |
95 | DBG("Found event %s for channel %s", name, | |
96 | channel->channel->name); | |
97 | return ev; | |
98 | } else { | |
99 | return NULL; | |
100 | } | |
101 | } | |
102 | ||
19e70852 | 103 | /* |
050349bb | 104 | * Find the event name for the given channel. |
19e70852 | 105 | */ |
62499ad6 | 106 | struct ltt_kernel_event *trace_kernel_get_event_by_name( |
d0ae4ea8 MD |
107 | char *name, struct ltt_kernel_channel *channel, |
108 | enum lttng_event_type type) | |
19e70852 DG |
109 | { |
110 | struct ltt_kernel_event *ev; | |
00a62084 | 111 | int found = 0; |
19e70852 | 112 | |
0525e9ae DG |
113 | assert(name); |
114 | assert(channel); | |
19e70852 DG |
115 | |
116 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
00a62084 | 117 | if (type != LTTNG_EVENT_ALL && ev->type != type) { |
d0ae4ea8 | 118 | continue; |
19e70852 | 119 | } |
00a62084 MD |
120 | if (strcmp(name, ev->event->name)) { |
121 | continue; | |
122 | } | |
123 | found = 1; | |
124 | break; | |
125 | } | |
126 | if (found) { | |
127 | DBG("Found event %s for channel %s", name, | |
128 | channel->channel->name); | |
129 | return ev; | |
130 | } else { | |
131 | return NULL; | |
19e70852 | 132 | } |
19e70852 DG |
133 | } |
134 | ||
54012638 | 135 | /* |
050349bb | 136 | * Allocate and initialize a kernel session data structure. |
54012638 | 137 | * |
050349bb | 138 | * Return pointer to structure or NULL. |
54012638 | 139 | */ |
dec56f6c | 140 | struct ltt_kernel_session *trace_kernel_create_session(void) |
54012638 | 141 | { |
a4b92340 | 142 | struct ltt_kernel_session *lks = NULL; |
54012638 DG |
143 | |
144 | /* Allocate a new ltt kernel session */ | |
ba7f0ae5 | 145 | lks = zmalloc(sizeof(struct ltt_kernel_session)); |
54012638 | 146 | if (lks == NULL) { |
df0f840b | 147 | PERROR("create kernel session zmalloc"); |
a4b92340 | 148 | goto alloc_error; |
54012638 DG |
149 | } |
150 | ||
151 | /* Init data structure */ | |
03550b58 MD |
152 | lks->fd = -1; |
153 | lks->metadata_stream_fd = -1; | |
54012638 DG |
154 | lks->channel_count = 0; |
155 | lks->stream_count_global = 0; | |
156 | lks->metadata = NULL; | |
157 | CDS_INIT_LIST_HEAD(&lks->channel_list.head); | |
158 | ||
00e2e675 DG |
159 | lks->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
160 | if (lks->consumer == NULL) { | |
161 | goto error; | |
162 | } | |
163 | ||
54012638 DG |
164 | return lks; |
165 | ||
166 | error: | |
a4b92340 DG |
167 | free(lks); |
168 | ||
169 | alloc_error: | |
54012638 DG |
170 | return NULL; |
171 | } | |
172 | ||
173 | /* | |
050349bb | 174 | * Allocate and initialize a kernel channel data structure. |
54012638 | 175 | * |
050349bb | 176 | * Return pointer to structure or NULL. |
54012638 | 177 | */ |
00e2e675 | 178 | struct ltt_kernel_channel *trace_kernel_create_channel( |
fdd9eb17 | 179 | struct lttng_channel *chan) |
54012638 | 180 | { |
54012638 | 181 | struct ltt_kernel_channel *lkc; |
54012638 | 182 | |
0525e9ae DG |
183 | assert(chan); |
184 | ||
ba7f0ae5 | 185 | lkc = zmalloc(sizeof(struct ltt_kernel_channel)); |
f3ed775e | 186 | if (lkc == NULL) { |
df0f840b | 187 | PERROR("ltt_kernel_channel zmalloc"); |
54012638 DG |
188 | goto error; |
189 | } | |
190 | ||
ba7f0ae5 | 191 | lkc->channel = zmalloc(sizeof(struct lttng_channel)); |
f3ed775e | 192 | if (lkc->channel == NULL) { |
df0f840b | 193 | PERROR("lttng_channel zmalloc"); |
ed594980 | 194 | free(lkc); |
f3ed775e DG |
195 | goto error; |
196 | } | |
197 | memcpy(lkc->channel, chan, sizeof(struct lttng_channel)); | |
54012638 | 198 | |
85076754 MD |
199 | /* |
200 | * If we receive an empty string for channel name, it means the | |
201 | * default channel name is requested. | |
202 | */ | |
203 | if (chan->name[0] == '\0') { | |
204 | strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME, | |
205 | sizeof(lkc->channel->name)); | |
206 | } | |
bd722d76 | 207 | lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; |
85076754 | 208 | |
03550b58 | 209 | lkc->fd = -1; |
54012638 | 210 | lkc->stream_count = 0; |
cbbbb275 | 211 | lkc->event_count = 0; |
d36b8583 | 212 | lkc->enabled = 1; |
54012638 DG |
213 | /* Init linked list */ |
214 | CDS_INIT_LIST_HEAD(&lkc->events_list.head); | |
215 | CDS_INIT_LIST_HEAD(&lkc->stream_list.head); | |
645328ae | 216 | CDS_INIT_LIST_HEAD(&lkc->ctx_list); |
54012638 DG |
217 | |
218 | return lkc; | |
219 | ||
220 | error: | |
221 | return NULL; | |
222 | } | |
223 | ||
645328ae DG |
224 | /* |
225 | * Allocate and init a kernel context object. | |
226 | * | |
227 | * Return the allocated object or NULL on error. | |
228 | */ | |
229 | struct ltt_kernel_context *trace_kernel_create_context( | |
230 | struct lttng_kernel_context *ctx) | |
231 | { | |
232 | struct ltt_kernel_context *kctx; | |
233 | ||
234 | kctx = zmalloc(sizeof(*kctx)); | |
235 | if (!kctx) { | |
236 | PERROR("zmalloc kernel context"); | |
237 | goto error; | |
238 | } | |
239 | ||
240 | if (ctx) { | |
241 | memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx)); | |
242 | } | |
da23da06 JG |
243 | error: |
244 | return kctx; | |
245 | } | |
645328ae | 246 | |
da23da06 JG |
247 | /* |
248 | * Allocate and init a kernel context object from an existing kernel context | |
249 | * object. | |
250 | * | |
251 | * Return the allocated object or NULL on error. | |
252 | */ | |
253 | struct ltt_kernel_context *trace_kernel_copy_context( | |
254 | struct ltt_kernel_context *kctx) | |
255 | { | |
256 | struct ltt_kernel_context *kctx_copy; | |
257 | ||
258 | assert(kctx); | |
259 | kctx_copy = zmalloc(sizeof(*kctx_copy)); | |
260 | if (!kctx_copy) { | |
261 | PERROR("zmalloc ltt_kernel_context"); | |
262 | goto error; | |
263 | } | |
264 | ||
265 | memcpy(kctx_copy, kctx, sizeof(*kctx_copy)); | |
266 | memset(&kctx_copy->list, 0, sizeof(kctx_copy->list)); | |
7b9445b3 | 267 | |
645328ae | 268 | error: |
da23da06 | 269 | return kctx_copy; |
645328ae DG |
270 | } |
271 | ||
54012638 | 272 | /* |
050349bb | 273 | * Allocate and initialize a kernel event. Set name and event type. |
a969e101 | 274 | * We own filter_expression, and filter. |
54012638 | 275 | * |
050349bb | 276 | * Return pointer to structure or NULL. |
54012638 | 277 | */ |
00a62084 MD |
278 | struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev, |
279 | char *filter_expression, struct lttng_filter_bytecode *filter) | |
54012638 DG |
280 | { |
281 | struct ltt_kernel_event *lke; | |
282 | struct lttng_kernel_event *attr; | |
283 | ||
0525e9ae DG |
284 | assert(ev); |
285 | ||
ba7f0ae5 DG |
286 | lke = zmalloc(sizeof(struct ltt_kernel_event)); |
287 | attr = zmalloc(sizeof(struct lttng_kernel_event)); | |
54012638 | 288 | if (lke == NULL || attr == NULL) { |
df0f840b | 289 | PERROR("kernel event zmalloc"); |
54012638 DG |
290 | goto error; |
291 | } | |
292 | ||
f3ed775e | 293 | switch (ev->type) { |
7d29a247 | 294 | case LTTNG_EVENT_PROBE: |
e6ddca71 | 295 | attr->instrumentation = LTTNG_KERNEL_KPROBE; |
7d29a247 DG |
296 | attr->u.kprobe.addr = ev->attr.probe.addr; |
297 | attr->u.kprobe.offset = ev->attr.probe.offset; | |
f3ed775e | 298 | strncpy(attr->u.kprobe.symbol_name, |
dbbb3ec5 DG |
299 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
300 | attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e DG |
301 | break; |
302 | case LTTNG_EVENT_FUNCTION: | |
8f0d098b MD |
303 | attr->instrumentation = LTTNG_KERNEL_KRETPROBE; |
304 | attr->u.kretprobe.addr = ev->attr.probe.addr; | |
305 | attr->u.kretprobe.offset = ev->attr.probe.offset; | |
8f0d098b | 306 | strncpy(attr->u.kretprobe.symbol_name, |
dbbb3ec5 DG |
307 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
308 | attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
8f0d098b MD |
309 | break; |
310 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
f3ed775e DG |
311 | attr->instrumentation = LTTNG_KERNEL_FUNCTION; |
312 | strncpy(attr->u.ftrace.symbol_name, | |
dbbb3ec5 DG |
313 | ev->attr.ftrace.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
314 | attr->u.ftrace.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 315 | break; |
e6ddca71 DG |
316 | case LTTNG_EVENT_TRACEPOINT: |
317 | attr->instrumentation = LTTNG_KERNEL_TRACEPOINT; | |
f3ed775e | 318 | break; |
a54bd42d MD |
319 | case LTTNG_EVENT_SYSCALL: |
320 | attr->instrumentation = LTTNG_KERNEL_SYSCALL; | |
0133c199 | 321 | break; |
7a3d1328 MD |
322 | case LTTNG_EVENT_ALL: |
323 | attr->instrumentation = LTTNG_KERNEL_ALL; | |
324 | break; | |
f3ed775e DG |
325 | default: |
326 | ERR("Unknown kernel instrumentation type (%d)", ev->type); | |
327 | goto error; | |
328 | } | |
329 | ||
330 | /* Copy event name */ | |
dbbb3ec5 DG |
331 | strncpy(attr->name, ev->name, LTTNG_KERNEL_SYM_NAME_LEN); |
332 | attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 333 | |
54012638 | 334 | /* Setting up a kernel event */ |
03550b58 | 335 | lke->fd = -1; |
54012638 | 336 | lke->event = attr; |
d36b8583 | 337 | lke->enabled = 1; |
00a62084 MD |
338 | lke->filter_expression = filter_expression; |
339 | lke->filter = filter; | |
54012638 DG |
340 | |
341 | return lke; | |
342 | ||
343 | error: | |
a969e101 MD |
344 | free(filter_expression); |
345 | free(filter); | |
a2c0da86 MD |
346 | free(lke); |
347 | free(attr); | |
54012638 DG |
348 | return NULL; |
349 | } | |
350 | ||
351 | /* | |
050349bb | 352 | * Allocate and initialize a kernel metadata. |
54012638 | 353 | * |
050349bb | 354 | * Return pointer to structure or NULL. |
54012638 | 355 | */ |
a4b92340 | 356 | struct ltt_kernel_metadata *trace_kernel_create_metadata(void) |
54012638 | 357 | { |
54012638 | 358 | struct ltt_kernel_metadata *lkm; |
f3ed775e | 359 | struct lttng_channel *chan; |
54012638 | 360 | |
ba7f0ae5 DG |
361 | lkm = zmalloc(sizeof(struct ltt_kernel_metadata)); |
362 | chan = zmalloc(sizeof(struct lttng_channel)); | |
f3ed775e | 363 | if (lkm == NULL || chan == NULL) { |
df0f840b | 364 | PERROR("kernel metadata zmalloc"); |
54012638 DG |
365 | goto error; |
366 | } | |
367 | ||
368 | /* Set default attributes */ | |
f3ed775e | 369 | chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 370 | chan->attr.subbuf_size = default_get_metadata_subbuf_size(); |
b389abbe | 371 | chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
6bb9e85f MD |
372 | chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
373 | chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
7d452e12 | 374 | chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
54012638 DG |
375 | |
376 | /* Init metadata */ | |
03550b58 | 377 | lkm->fd = -1; |
f3ed775e | 378 | lkm->conf = chan; |
54012638 DG |
379 | |
380 | return lkm; | |
381 | ||
382 | error: | |
a2c0da86 MD |
383 | free(lkm); |
384 | free(chan); | |
54012638 DG |
385 | return NULL; |
386 | } | |
387 | ||
388 | /* | |
050349bb DG |
389 | * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by |
390 | * default. | |
54012638 | 391 | * |
050349bb | 392 | * Return pointer to structure or NULL. |
54012638 | 393 | */ |
00e2e675 DG |
394 | struct ltt_kernel_stream *trace_kernel_create_stream(const char *name, |
395 | unsigned int count) | |
54012638 | 396 | { |
00e2e675 | 397 | int ret; |
54012638 DG |
398 | struct ltt_kernel_stream *lks; |
399 | ||
0525e9ae DG |
400 | assert(name); |
401 | ||
ba7f0ae5 | 402 | lks = zmalloc(sizeof(struct ltt_kernel_stream)); |
54012638 | 403 | if (lks == NULL) { |
df0f840b | 404 | PERROR("kernel stream zmalloc"); |
54012638 DG |
405 | goto error; |
406 | } | |
407 | ||
00e2e675 | 408 | /* Set name */ |
535b8ff4 | 409 | ret = snprintf(lks->name, sizeof(lks->name), "%s_%u", name, count); |
00e2e675 DG |
410 | if (ret < 0) { |
411 | PERROR("snprintf stream name"); | |
412 | goto error; | |
413 | } | |
414 | lks->name[sizeof(lks->name) - 1] = '\0'; | |
415 | ||
54012638 | 416 | /* Init stream */ |
03550b58 | 417 | lks->fd = -1; |
54012638 | 418 | lks->state = 0; |
ffe60014 | 419 | lks->cpu = count; |
54012638 DG |
420 | |
421 | return lks; | |
422 | ||
423 | error: | |
424 | return NULL; | |
425 | } | |
c363b55d | 426 | |
050349bb DG |
427 | /* |
428 | * Cleanup kernel stream structure. | |
429 | */ | |
62499ad6 | 430 | void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream) |
c363b55d | 431 | { |
0525e9ae DG |
432 | assert(stream); |
433 | ||
33a2b854 | 434 | DBG("[trace] Closing stream fd %d", stream->fd); |
c363b55d | 435 | /* Close kernel fd */ |
03550b58 | 436 | if (stream->fd >= 0) { |
c617c0c6 MD |
437 | int ret; |
438 | ||
03550b58 MD |
439 | ret = close(stream->fd); |
440 | if (ret) { | |
441 | PERROR("close"); | |
442 | } | |
799e2c4f | 443 | } |
c363b55d DG |
444 | /* Remove from stream list */ |
445 | cds_list_del(&stream->list); | |
f9815039 | 446 | |
c363b55d DG |
447 | free(stream); |
448 | } | |
449 | ||
050349bb DG |
450 | /* |
451 | * Cleanup kernel event structure. | |
452 | */ | |
62499ad6 | 453 | void trace_kernel_destroy_event(struct ltt_kernel_event *event) |
c363b55d | 454 | { |
0525e9ae DG |
455 | assert(event); |
456 | ||
87eb4ab8 | 457 | if (event->fd >= 0) { |
c617c0c6 MD |
458 | int ret; |
459 | ||
87eb4ab8 MD |
460 | DBG("[trace] Closing event fd %d", event->fd); |
461 | /* Close kernel fd */ | |
799e2c4f MD |
462 | ret = close(event->fd); |
463 | if (ret) { | |
464 | PERROR("close"); | |
465 | } | |
87eb4ab8 MD |
466 | } else { |
467 | DBG("[trace] Tearing down event (no associated fd)"); | |
468 | } | |
c363b55d DG |
469 | |
470 | /* Remove from event list */ | |
471 | cds_list_del(&event->list); | |
f9815039 | 472 | |
00a62084 MD |
473 | free(event->filter_expression); |
474 | free(event->filter); | |
475 | ||
f9815039 | 476 | free(event->event); |
c363b55d DG |
477 | free(event); |
478 | } | |
479 | ||
645328ae DG |
480 | /* |
481 | * Cleanup kernel context structure. | |
482 | */ | |
483 | void trace_kernel_destroy_context(struct ltt_kernel_context *ctx) | |
484 | { | |
485 | assert(ctx); | |
486 | ||
9b09ad37 JG |
487 | if (ctx->in_list) { |
488 | cds_list_del(&ctx->list); | |
489 | } | |
645328ae DG |
490 | free(ctx); |
491 | } | |
492 | ||
050349bb DG |
493 | /* |
494 | * Cleanup kernel channel structure. | |
495 | */ | |
62499ad6 | 496 | void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel) |
c363b55d | 497 | { |
af9737e9 DG |
498 | struct ltt_kernel_stream *stream, *stmp; |
499 | struct ltt_kernel_event *event, *etmp; | |
645328ae | 500 | struct ltt_kernel_context *ctx, *ctmp; |
799e2c4f | 501 | int ret; |
c363b55d | 502 | |
0525e9ae DG |
503 | assert(channel); |
504 | ||
33a2b854 | 505 | DBG("[trace] Closing channel fd %d", channel->fd); |
c363b55d | 506 | /* Close kernel fd */ |
03550b58 MD |
507 | if (channel->fd >= 0) { |
508 | ret = close(channel->fd); | |
509 | if (ret) { | |
510 | PERROR("close"); | |
511 | } | |
799e2c4f | 512 | } |
c363b55d DG |
513 | |
514 | /* For each stream in the channel list */ | |
af9737e9 | 515 | cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) { |
62499ad6 | 516 | trace_kernel_destroy_stream(stream); |
c363b55d DG |
517 | } |
518 | ||
519 | /* For each event in the channel list */ | |
af9737e9 | 520 | cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) { |
62499ad6 | 521 | trace_kernel_destroy_event(event); |
c363b55d DG |
522 | } |
523 | ||
645328ae DG |
524 | /* For each context in the channel list */ |
525 | cds_list_for_each_entry_safe(ctx, ctmp, &channel->ctx_list, list) { | |
526 | trace_kernel_destroy_context(ctx); | |
527 | } | |
528 | ||
c363b55d DG |
529 | /* Remove from channel list */ |
530 | cds_list_del(&channel->list); | |
f9815039 | 531 | |
f9815039 | 532 | free(channel->channel); |
c363b55d DG |
533 | free(channel); |
534 | } | |
535 | ||
050349bb DG |
536 | /* |
537 | * Cleanup kernel metadata structure. | |
538 | */ | |
62499ad6 | 539 | void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata) |
c363b55d | 540 | { |
0525e9ae DG |
541 | assert(metadata); |
542 | ||
33a2b854 | 543 | DBG("[trace] Closing metadata fd %d", metadata->fd); |
c363b55d | 544 | /* Close kernel fd */ |
03550b58 | 545 | if (metadata->fd >= 0) { |
c617c0c6 MD |
546 | int ret; |
547 | ||
03550b58 MD |
548 | ret = close(metadata->fd); |
549 | if (ret) { | |
550 | PERROR("close"); | |
551 | } | |
799e2c4f | 552 | } |
c363b55d | 553 | |
f9815039 | 554 | free(metadata->conf); |
c363b55d DG |
555 | free(metadata); |
556 | } | |
557 | ||
050349bb | 558 | /* |
62499ad6 | 559 | * Cleanup kernel session structure |
36b588ed MD |
560 | * |
561 | * Should *NOT* be called with RCU read-side lock held. | |
050349bb | 562 | */ |
62499ad6 | 563 | void trace_kernel_destroy_session(struct ltt_kernel_session *session) |
c363b55d | 564 | { |
af9737e9 | 565 | struct ltt_kernel_channel *channel, *ctmp; |
799e2c4f | 566 | int ret; |
c363b55d | 567 | |
0525e9ae DG |
568 | assert(session); |
569 | ||
33a2b854 | 570 | DBG("[trace] Closing session fd %d", session->fd); |
c363b55d | 571 | /* Close kernel fds */ |
03550b58 MD |
572 | if (session->fd >= 0) { |
573 | ret = close(session->fd); | |
574 | if (ret) { | |
575 | PERROR("close"); | |
576 | } | |
799e2c4f | 577 | } |
f9815039 | 578 | |
03550b58 | 579 | if (session->metadata_stream_fd >= 0) { |
70dc1c34 | 580 | DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd); |
799e2c4f MD |
581 | ret = close(session->metadata_stream_fd); |
582 | if (ret) { | |
583 | PERROR("close"); | |
584 | } | |
70dc1c34 | 585 | } |
c363b55d | 586 | |
d36b8583 | 587 | if (session->metadata != NULL) { |
62499ad6 | 588 | trace_kernel_destroy_metadata(session->metadata); |
d36b8583 | 589 | } |
c363b55d | 590 | |
af9737e9 | 591 | cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) { |
62499ad6 | 592 | trace_kernel_destroy_channel(channel); |
c363b55d DG |
593 | } |
594 | ||
00e2e675 | 595 | /* Wipe consumer output object */ |
6addfa37 | 596 | consumer_output_put(session->consumer); |
00e2e675 | 597 | |
c363b55d DG |
598 | free(session); |
599 | } |