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