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 | |
dcabc190 FD |
24 | #include <lttng/event.h> |
25 | #include <lttng/lttng-error.h> | |
26 | #include <lttng/userspace-probe.h> | |
27 | #include <lttng/userspace-probe-internal.h> | |
28 | ||
990570ed DG |
29 | #include <common/common.h> |
30 | #include <common/defaults.h> | |
1e307fab | 31 | |
00e2e675 | 32 | #include "consumer.h" |
62499ad6 | 33 | #include "trace-kernel.h" |
e9404c27 JG |
34 | #include "lttng-sessiond.h" |
35 | #include "notification-thread-commands.h" | |
54012638 | 36 | |
19e70852 | 37 | /* |
050349bb | 38 | * Find the channel name for the given kernel session. |
19e70852 | 39 | */ |
62499ad6 | 40 | struct ltt_kernel_channel *trace_kernel_get_channel_by_name( |
19e70852 DG |
41 | char *name, struct ltt_kernel_session *session) |
42 | { | |
43 | struct ltt_kernel_channel *chan; | |
44 | ||
0525e9ae DG |
45 | assert(session); |
46 | assert(name); | |
19e70852 | 47 | |
85076754 MD |
48 | /* |
49 | * If we receive an empty string for channel name, it means the | |
50 | * default channel name is requested. | |
51 | */ | |
52 | if (name[0] == '\0') | |
53 | name = DEFAULT_CHANNEL_NAME; | |
54 | ||
54d01ffb DG |
55 | DBG("Trying to find channel %s", name); |
56 | ||
19e70852 DG |
57 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
58 | if (strcmp(name, chan->channel->name) == 0) { | |
59 | DBG("Found channel by name %s", name); | |
60 | return chan; | |
61 | } | |
62 | } | |
63 | ||
19e70852 DG |
64 | return NULL; |
65 | } | |
66 | ||
00a62084 MD |
67 | /* |
68 | * Find the event for the given channel. | |
69 | */ | |
70 | struct ltt_kernel_event *trace_kernel_find_event( | |
71 | char *name, struct ltt_kernel_channel *channel, | |
72 | enum lttng_event_type type, | |
73 | struct lttng_filter_bytecode *filter) | |
74 | { | |
75 | struct ltt_kernel_event *ev; | |
76 | int found = 0; | |
77 | ||
78 | assert(name); | |
79 | assert(channel); | |
80 | ||
81 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
82 | if (type != LTTNG_EVENT_ALL && ev->type != type) { | |
83 | continue; | |
84 | } | |
85 | if (strcmp(name, ev->event->name)) { | |
86 | continue; | |
87 | } | |
88 | if ((ev->filter && !filter) || (!ev->filter && filter)) { | |
89 | continue; | |
90 | } | |
91 | if (ev->filter && filter) { | |
92 | if (ev->filter->len != filter->len || | |
93 | memcmp(ev->filter->data, filter->data, | |
94 | filter->len) != 0) { | |
95 | continue; | |
96 | } | |
97 | } | |
98 | found = 1; | |
99 | break; | |
100 | } | |
101 | if (found) { | |
102 | DBG("Found event %s for channel %s", name, | |
103 | channel->channel->name); | |
104 | return ev; | |
105 | } else { | |
106 | return NULL; | |
107 | } | |
108 | } | |
109 | ||
19e70852 | 110 | /* |
050349bb | 111 | * Find the event name for the given channel. |
19e70852 | 112 | */ |
62499ad6 | 113 | struct ltt_kernel_event *trace_kernel_get_event_by_name( |
d0ae4ea8 MD |
114 | char *name, struct ltt_kernel_channel *channel, |
115 | enum lttng_event_type type) | |
19e70852 DG |
116 | { |
117 | struct ltt_kernel_event *ev; | |
00a62084 | 118 | int found = 0; |
19e70852 | 119 | |
0525e9ae DG |
120 | assert(name); |
121 | assert(channel); | |
19e70852 DG |
122 | |
123 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
00a62084 | 124 | if (type != LTTNG_EVENT_ALL && ev->type != type) { |
d0ae4ea8 | 125 | continue; |
19e70852 | 126 | } |
00a62084 MD |
127 | if (strcmp(name, ev->event->name)) { |
128 | continue; | |
129 | } | |
130 | found = 1; | |
131 | break; | |
132 | } | |
133 | if (found) { | |
134 | DBG("Found event %s for channel %s", name, | |
135 | channel->channel->name); | |
136 | return ev; | |
137 | } else { | |
138 | return NULL; | |
19e70852 | 139 | } |
19e70852 DG |
140 | } |
141 | ||
54012638 | 142 | /* |
050349bb | 143 | * Allocate and initialize a kernel session data structure. |
54012638 | 144 | * |
050349bb | 145 | * Return pointer to structure or NULL. |
54012638 | 146 | */ |
dec56f6c | 147 | struct ltt_kernel_session *trace_kernel_create_session(void) |
54012638 | 148 | { |
a4b92340 | 149 | struct ltt_kernel_session *lks = NULL; |
54012638 DG |
150 | |
151 | /* Allocate a new ltt kernel session */ | |
ba7f0ae5 | 152 | lks = zmalloc(sizeof(struct ltt_kernel_session)); |
54012638 | 153 | if (lks == NULL) { |
df0f840b | 154 | PERROR("create kernel session zmalloc"); |
a4b92340 | 155 | goto alloc_error; |
54012638 DG |
156 | } |
157 | ||
158 | /* Init data structure */ | |
03550b58 MD |
159 | lks->fd = -1; |
160 | lks->metadata_stream_fd = -1; | |
54012638 DG |
161 | lks->channel_count = 0; |
162 | lks->stream_count_global = 0; | |
163 | lks->metadata = NULL; | |
164 | CDS_INIT_LIST_HEAD(&lks->channel_list.head); | |
165 | ||
00e2e675 DG |
166 | lks->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
167 | if (lks->consumer == NULL) { | |
168 | goto error; | |
169 | } | |
170 | ||
54012638 DG |
171 | return lks; |
172 | ||
173 | error: | |
a4b92340 DG |
174 | free(lks); |
175 | ||
176 | alloc_error: | |
54012638 DG |
177 | return NULL; |
178 | } | |
179 | ||
180 | /* | |
050349bb | 181 | * Allocate and initialize a kernel channel data structure. |
54012638 | 182 | * |
050349bb | 183 | * Return pointer to structure or NULL. |
54012638 | 184 | */ |
00e2e675 | 185 | struct ltt_kernel_channel *trace_kernel_create_channel( |
fdd9eb17 | 186 | struct lttng_channel *chan) |
54012638 | 187 | { |
54012638 | 188 | struct ltt_kernel_channel *lkc; |
61a5b6b1 | 189 | struct lttng_channel_extended *extended = NULL; |
54012638 | 190 | |
0525e9ae DG |
191 | assert(chan); |
192 | ||
ba7f0ae5 | 193 | lkc = zmalloc(sizeof(struct ltt_kernel_channel)); |
f3ed775e | 194 | if (lkc == NULL) { |
df0f840b | 195 | PERROR("ltt_kernel_channel zmalloc"); |
54012638 DG |
196 | goto error; |
197 | } | |
198 | ||
ba7f0ae5 | 199 | lkc->channel = zmalloc(sizeof(struct lttng_channel)); |
f3ed775e | 200 | if (lkc->channel == NULL) { |
df0f840b | 201 | PERROR("lttng_channel zmalloc"); |
e9404c27 JG |
202 | goto error; |
203 | } | |
204 | ||
205 | extended = zmalloc(sizeof(struct lttng_channel_extended)); | |
206 | if (!extended) { | |
207 | PERROR("lttng_channel_channel zmalloc"); | |
f3ed775e DG |
208 | goto error; |
209 | } | |
210 | memcpy(lkc->channel, chan, sizeof(struct lttng_channel)); | |
e9404c27 JG |
211 | memcpy(extended, chan->attr.extended.ptr, sizeof(struct lttng_channel_extended)); |
212 | lkc->channel->attr.extended.ptr = extended; | |
213 | extended = NULL; | |
54012638 | 214 | |
85076754 MD |
215 | /* |
216 | * If we receive an empty string for channel name, it means the | |
217 | * default channel name is requested. | |
218 | */ | |
219 | if (chan->name[0] == '\0') { | |
220 | strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME, | |
221 | sizeof(lkc->channel->name)); | |
222 | } | |
bd722d76 | 223 | lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; |
85076754 | 224 | |
03550b58 | 225 | lkc->fd = -1; |
54012638 | 226 | lkc->stream_count = 0; |
cbbbb275 | 227 | lkc->event_count = 0; |
d36b8583 | 228 | lkc->enabled = 1; |
753873bf | 229 | lkc->published_to_notification_thread = false; |
54012638 DG |
230 | /* Init linked list */ |
231 | CDS_INIT_LIST_HEAD(&lkc->events_list.head); | |
232 | CDS_INIT_LIST_HEAD(&lkc->stream_list.head); | |
645328ae | 233 | CDS_INIT_LIST_HEAD(&lkc->ctx_list); |
54012638 DG |
234 | |
235 | return lkc; | |
236 | ||
237 | error: | |
e9404c27 JG |
238 | if (lkc) { |
239 | free(lkc->channel); | |
240 | } | |
241 | free(extended); | |
242 | free(lkc); | |
54012638 DG |
243 | return NULL; |
244 | } | |
245 | ||
645328ae DG |
246 | /* |
247 | * Allocate and init a kernel context object. | |
248 | * | |
249 | * Return the allocated object or NULL on error. | |
250 | */ | |
251 | struct ltt_kernel_context *trace_kernel_create_context( | |
252 | struct lttng_kernel_context *ctx) | |
253 | { | |
254 | struct ltt_kernel_context *kctx; | |
255 | ||
256 | kctx = zmalloc(sizeof(*kctx)); | |
257 | if (!kctx) { | |
258 | PERROR("zmalloc kernel context"); | |
259 | goto error; | |
260 | } | |
261 | ||
262 | if (ctx) { | |
263 | memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx)); | |
264 | } | |
df3c77c8 JG |
265 | error: |
266 | return kctx; | |
267 | } | |
645328ae | 268 | |
df3c77c8 JG |
269 | /* |
270 | * Allocate and init a kernel context object from an existing kernel context | |
271 | * object. | |
272 | * | |
273 | * Return the allocated object or NULL on error. | |
274 | */ | |
275 | struct ltt_kernel_context *trace_kernel_copy_context( | |
276 | struct ltt_kernel_context *kctx) | |
277 | { | |
278 | struct ltt_kernel_context *kctx_copy; | |
279 | ||
280 | assert(kctx); | |
281 | kctx_copy = zmalloc(sizeof(*kctx_copy)); | |
282 | if (!kctx_copy) { | |
283 | PERROR("zmalloc ltt_kernel_context"); | |
284 | goto error; | |
285 | } | |
286 | ||
287 | memcpy(kctx_copy, kctx, sizeof(*kctx_copy)); | |
288 | memset(&kctx_copy->list, 0, sizeof(kctx_copy->list)); | |
7b9445b3 | 289 | |
645328ae | 290 | error: |
df3c77c8 | 291 | return kctx_copy; |
645328ae DG |
292 | } |
293 | ||
54012638 | 294 | /* |
050349bb | 295 | * Allocate and initialize a kernel event. Set name and event type. |
a969e101 | 296 | * We own filter_expression, and filter. |
54012638 | 297 | * |
050349bb | 298 | * Return pointer to structure or NULL. |
54012638 | 299 | */ |
71a3bb01 FD |
300 | enum lttng_error_code trace_kernel_create_event( |
301 | struct lttng_event *ev, char *filter_expression, | |
302 | struct lttng_filter_bytecode *filter, | |
303 | struct ltt_kernel_event **kernel_event) | |
54012638 | 304 | { |
71a3bb01 | 305 | enum lttng_error_code ret; |
54012638 | 306 | struct lttng_kernel_event *attr; |
71a3bb01 | 307 | struct ltt_kernel_event *local_kernel_event; |
dcabc190 | 308 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; |
54012638 | 309 | |
0525e9ae DG |
310 | assert(ev); |
311 | ||
71a3bb01 | 312 | local_kernel_event = zmalloc(sizeof(struct ltt_kernel_event)); |
ba7f0ae5 | 313 | attr = zmalloc(sizeof(struct lttng_kernel_event)); |
71a3bb01 | 314 | if (local_kernel_event == NULL || attr == NULL) { |
df0f840b | 315 | PERROR("kernel event zmalloc"); |
71a3bb01 | 316 | ret = LTTNG_ERR_NOMEM; |
54012638 DG |
317 | goto error; |
318 | } | |
319 | ||
f3ed775e | 320 | switch (ev->type) { |
7d29a247 | 321 | case LTTNG_EVENT_PROBE: |
e6ddca71 | 322 | attr->instrumentation = LTTNG_KERNEL_KPROBE; |
7d29a247 DG |
323 | attr->u.kprobe.addr = ev->attr.probe.addr; |
324 | attr->u.kprobe.offset = ev->attr.probe.offset; | |
f3ed775e | 325 | strncpy(attr->u.kprobe.symbol_name, |
dbbb3ec5 DG |
326 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
327 | attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 328 | break; |
dcabc190 FD |
329 | case LTTNG_EVENT_USERSPACE_PROBE: |
330 | { | |
331 | struct lttng_userspace_probe_location* location = NULL; | |
332 | struct lttng_userspace_probe_location_lookup_method *lookup = NULL; | |
333 | ||
334 | location = lttng_event_get_userspace_probe_location(ev); | |
335 | if (!location) { | |
336 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
337 | goto error; | |
338 | } | |
339 | ||
340 | /* | |
341 | * From this point on, the specific term 'uprobe' is used | |
342 | * instead of the generic 'userspace probe' because it's the | |
343 | * technology used at the moment for this instrumentation. | |
344 | * LTTng currently implements userspace probes using uprobes. | |
345 | * In the interactions with the kernel tracer, we use the | |
346 | * uprobe term. | |
347 | */ | |
348 | attr->instrumentation = LTTNG_KERNEL_UPROBE; | |
349 | ||
350 | /* | |
351 | * Only the elf lookup method is supported at the moment. | |
352 | */ | |
353 | lookup = lttng_userspace_probe_location_get_lookup_method( | |
354 | location); | |
355 | if (!lookup) { | |
356 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
357 | goto error; | |
358 | } | |
359 | ||
360 | /* | |
361 | * From the kernel tracer's perspective, all userspace probe | |
362 | * event types are all the same: a file and an offset. | |
363 | */ | |
364 | switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) { | |
365 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
366 | /* Get the file descriptor on the target binary. */ | |
367 | attr->u.uprobe.fd = | |
368 | lttng_userspace_probe_location_function_get_binary_fd(location); | |
369 | ||
370 | /* | |
371 | * Save a reference to the probe location used during | |
372 | * the listing of events. Close its FD since it won't | |
373 | * be needed for listing. | |
374 | */ | |
375 | userspace_probe_location = | |
376 | lttng_userspace_probe_location_copy(location); | |
377 | ret = lttng_userspace_probe_location_function_set_binary_fd( | |
378 | userspace_probe_location, -1); | |
379 | if (ret) { | |
380 | goto error; | |
381 | } | |
382 | break; | |
383 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
384 | /* Get the file descriptor on the target binary. */ | |
385 | attr->u.uprobe.fd = | |
386 | lttng_userspace_probe_location_tracepoint_get_binary_fd(location); | |
387 | ||
388 | /* | |
389 | * Save a reference to the probe location used during the listing of | |
390 | * events. Close its FD since it won't be needed for listing. | |
391 | */ | |
392 | userspace_probe_location = | |
393 | lttng_userspace_probe_location_copy(location); | |
394 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
395 | userspace_probe_location, -1); | |
396 | if (ret) { | |
397 | goto error; | |
398 | } | |
399 | break; | |
400 | default: | |
401 | DBG("Unsupported lookup method type"); | |
402 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
403 | goto error; | |
404 | } | |
405 | break; | |
406 | } | |
f3ed775e | 407 | case LTTNG_EVENT_FUNCTION: |
8f0d098b MD |
408 | attr->instrumentation = LTTNG_KERNEL_KRETPROBE; |
409 | attr->u.kretprobe.addr = ev->attr.probe.addr; | |
410 | attr->u.kretprobe.offset = ev->attr.probe.offset; | |
8f0d098b | 411 | strncpy(attr->u.kretprobe.symbol_name, |
dbbb3ec5 DG |
412 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
413 | attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
8f0d098b MD |
414 | break; |
415 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
f3ed775e DG |
416 | attr->instrumentation = LTTNG_KERNEL_FUNCTION; |
417 | strncpy(attr->u.ftrace.symbol_name, | |
dbbb3ec5 DG |
418 | ev->attr.ftrace.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
419 | attr->u.ftrace.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 420 | break; |
e6ddca71 DG |
421 | case LTTNG_EVENT_TRACEPOINT: |
422 | attr->instrumentation = LTTNG_KERNEL_TRACEPOINT; | |
f3ed775e | 423 | break; |
a54bd42d MD |
424 | case LTTNG_EVENT_SYSCALL: |
425 | attr->instrumentation = LTTNG_KERNEL_SYSCALL; | |
0133c199 | 426 | break; |
7a3d1328 MD |
427 | case LTTNG_EVENT_ALL: |
428 | attr->instrumentation = LTTNG_KERNEL_ALL; | |
429 | break; | |
f3ed775e DG |
430 | default: |
431 | ERR("Unknown kernel instrumentation type (%d)", ev->type); | |
71a3bb01 | 432 | ret = LTTNG_ERR_INVALID; |
f3ed775e DG |
433 | goto error; |
434 | } | |
435 | ||
436 | /* Copy event name */ | |
dbbb3ec5 DG |
437 | strncpy(attr->name, ev->name, LTTNG_KERNEL_SYM_NAME_LEN); |
438 | attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 439 | |
54012638 | 440 | /* Setting up a kernel event */ |
71a3bb01 FD |
441 | local_kernel_event->fd = -1; |
442 | local_kernel_event->event = attr; | |
443 | local_kernel_event->enabled = 1; | |
444 | local_kernel_event->filter_expression = filter_expression; | |
445 | local_kernel_event->filter = filter; | |
dcabc190 | 446 | local_kernel_event->userspace_probe_location = userspace_probe_location; |
54012638 | 447 | |
71a3bb01 FD |
448 | *kernel_event = local_kernel_event; |
449 | ||
450 | return LTTNG_OK; | |
54012638 DG |
451 | |
452 | error: | |
a969e101 MD |
453 | free(filter_expression); |
454 | free(filter); | |
71a3bb01 | 455 | free(local_kernel_event); |
a2c0da86 | 456 | free(attr); |
71a3bb01 | 457 | return ret; |
54012638 DG |
458 | } |
459 | ||
460 | /* | |
050349bb | 461 | * Allocate and initialize a kernel metadata. |
54012638 | 462 | * |
050349bb | 463 | * Return pointer to structure or NULL. |
54012638 | 464 | */ |
a4b92340 | 465 | struct ltt_kernel_metadata *trace_kernel_create_metadata(void) |
54012638 | 466 | { |
54012638 | 467 | struct ltt_kernel_metadata *lkm; |
f3ed775e | 468 | struct lttng_channel *chan; |
54012638 | 469 | |
ba7f0ae5 DG |
470 | lkm = zmalloc(sizeof(struct ltt_kernel_metadata)); |
471 | chan = zmalloc(sizeof(struct lttng_channel)); | |
f3ed775e | 472 | if (lkm == NULL || chan == NULL) { |
df0f840b | 473 | PERROR("kernel metadata zmalloc"); |
54012638 DG |
474 | goto error; |
475 | } | |
476 | ||
477 | /* Set default attributes */ | |
f3ed775e | 478 | chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 479 | chan->attr.subbuf_size = default_get_metadata_subbuf_size(); |
b389abbe | 480 | chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
6bb9e85f MD |
481 | chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
482 | chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
7d452e12 | 483 | chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
54012638 DG |
484 | |
485 | /* Init metadata */ | |
03550b58 | 486 | lkm->fd = -1; |
f3ed775e | 487 | lkm->conf = chan; |
54012638 DG |
488 | |
489 | return lkm; | |
490 | ||
491 | error: | |
a2c0da86 MD |
492 | free(lkm); |
493 | free(chan); | |
54012638 DG |
494 | return NULL; |
495 | } | |
496 | ||
497 | /* | |
050349bb DG |
498 | * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by |
499 | * default. | |
54012638 | 500 | * |
050349bb | 501 | * Return pointer to structure or NULL. |
54012638 | 502 | */ |
00e2e675 DG |
503 | struct ltt_kernel_stream *trace_kernel_create_stream(const char *name, |
504 | unsigned int count) | |
54012638 | 505 | { |
00e2e675 | 506 | int ret; |
54012638 DG |
507 | struct ltt_kernel_stream *lks; |
508 | ||
0525e9ae DG |
509 | assert(name); |
510 | ||
ba7f0ae5 | 511 | lks = zmalloc(sizeof(struct ltt_kernel_stream)); |
54012638 | 512 | if (lks == NULL) { |
df0f840b | 513 | PERROR("kernel stream zmalloc"); |
54012638 DG |
514 | goto error; |
515 | } | |
516 | ||
00e2e675 | 517 | /* Set name */ |
535b8ff4 | 518 | ret = snprintf(lks->name, sizeof(lks->name), "%s_%u", name, count); |
00e2e675 DG |
519 | if (ret < 0) { |
520 | PERROR("snprintf stream name"); | |
521 | goto error; | |
522 | } | |
523 | lks->name[sizeof(lks->name) - 1] = '\0'; | |
524 | ||
54012638 | 525 | /* Init stream */ |
03550b58 | 526 | lks->fd = -1; |
54012638 | 527 | lks->state = 0; |
ffe60014 | 528 | lks->cpu = count; |
54012638 DG |
529 | |
530 | return lks; | |
531 | ||
532 | error: | |
533 | return NULL; | |
534 | } | |
c363b55d | 535 | |
050349bb DG |
536 | /* |
537 | * Cleanup kernel stream structure. | |
538 | */ | |
62499ad6 | 539 | void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream) |
c363b55d | 540 | { |
0525e9ae DG |
541 | assert(stream); |
542 | ||
33a2b854 | 543 | DBG("[trace] Closing stream fd %d", stream->fd); |
c363b55d | 544 | /* Close kernel fd */ |
03550b58 | 545 | if (stream->fd >= 0) { |
c617c0c6 MD |
546 | int ret; |
547 | ||
03550b58 MD |
548 | ret = close(stream->fd); |
549 | if (ret) { | |
550 | PERROR("close"); | |
551 | } | |
799e2c4f | 552 | } |
c363b55d DG |
553 | /* Remove from stream list */ |
554 | cds_list_del(&stream->list); | |
f9815039 | 555 | |
c363b55d DG |
556 | free(stream); |
557 | } | |
558 | ||
050349bb DG |
559 | /* |
560 | * Cleanup kernel event structure. | |
561 | */ | |
62499ad6 | 562 | void trace_kernel_destroy_event(struct ltt_kernel_event *event) |
c363b55d | 563 | { |
0525e9ae DG |
564 | assert(event); |
565 | ||
87eb4ab8 | 566 | if (event->fd >= 0) { |
c617c0c6 MD |
567 | int ret; |
568 | ||
87eb4ab8 MD |
569 | DBG("[trace] Closing event fd %d", event->fd); |
570 | /* Close kernel fd */ | |
799e2c4f MD |
571 | ret = close(event->fd); |
572 | if (ret) { | |
573 | PERROR("close"); | |
574 | } | |
87eb4ab8 MD |
575 | } else { |
576 | DBG("[trace] Tearing down event (no associated fd)"); | |
577 | } | |
c363b55d DG |
578 | |
579 | /* Remove from event list */ | |
580 | cds_list_del(&event->list); | |
f9815039 | 581 | |
00a62084 MD |
582 | free(event->filter_expression); |
583 | free(event->filter); | |
584 | ||
f9815039 | 585 | free(event->event); |
c363b55d DG |
586 | free(event); |
587 | } | |
588 | ||
645328ae DG |
589 | /* |
590 | * Cleanup kernel context structure. | |
591 | */ | |
592 | void trace_kernel_destroy_context(struct ltt_kernel_context *ctx) | |
593 | { | |
594 | assert(ctx); | |
595 | ||
ba985c3a JG |
596 | if (ctx->in_list) { |
597 | cds_list_del(&ctx->list); | |
598 | } | |
645328ae DG |
599 | free(ctx); |
600 | } | |
601 | ||
050349bb DG |
602 | /* |
603 | * Cleanup kernel channel structure. | |
604 | */ | |
62499ad6 | 605 | void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel) |
c363b55d | 606 | { |
af9737e9 DG |
607 | struct ltt_kernel_stream *stream, *stmp; |
608 | struct ltt_kernel_event *event, *etmp; | |
645328ae | 609 | struct ltt_kernel_context *ctx, *ctmp; |
799e2c4f | 610 | int ret; |
e9404c27 | 611 | enum lttng_error_code status; |
c363b55d | 612 | |
0525e9ae DG |
613 | assert(channel); |
614 | ||
33a2b854 | 615 | DBG("[trace] Closing channel fd %d", channel->fd); |
c363b55d | 616 | /* Close kernel fd */ |
03550b58 MD |
617 | if (channel->fd >= 0) { |
618 | ret = close(channel->fd); | |
619 | if (ret) { | |
620 | PERROR("close"); | |
621 | } | |
799e2c4f | 622 | } |
c363b55d DG |
623 | |
624 | /* For each stream in the channel list */ | |
af9737e9 | 625 | cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) { |
62499ad6 | 626 | trace_kernel_destroy_stream(stream); |
c363b55d DG |
627 | } |
628 | ||
629 | /* For each event in the channel list */ | |
af9737e9 | 630 | cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) { |
62499ad6 | 631 | trace_kernel_destroy_event(event); |
c363b55d DG |
632 | } |
633 | ||
645328ae DG |
634 | /* For each context in the channel list */ |
635 | cds_list_for_each_entry_safe(ctx, ctmp, &channel->ctx_list, list) { | |
636 | trace_kernel_destroy_context(ctx); | |
637 | } | |
638 | ||
c363b55d DG |
639 | /* Remove from channel list */ |
640 | cds_list_del(&channel->list); | |
f9815039 | 641 | |
753873bf JR |
642 | if (notification_thread_handle |
643 | && channel->published_to_notification_thread) { | |
63aaa3dc JG |
644 | status = notification_thread_command_remove_channel( |
645 | notification_thread_handle, | |
e1f3997a | 646 | channel->key, LTTNG_DOMAIN_KERNEL); |
63aaa3dc JG |
647 | assert(status == LTTNG_OK); |
648 | } | |
e9404c27 | 649 | free(channel->channel->attr.extended.ptr); |
f9815039 | 650 | free(channel->channel); |
c363b55d DG |
651 | free(channel); |
652 | } | |
653 | ||
050349bb DG |
654 | /* |
655 | * Cleanup kernel metadata structure. | |
656 | */ | |
62499ad6 | 657 | void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata) |
c363b55d | 658 | { |
0525e9ae DG |
659 | assert(metadata); |
660 | ||
33a2b854 | 661 | DBG("[trace] Closing metadata fd %d", metadata->fd); |
c363b55d | 662 | /* Close kernel fd */ |
03550b58 | 663 | if (metadata->fd >= 0) { |
c617c0c6 MD |
664 | int ret; |
665 | ||
03550b58 MD |
666 | ret = close(metadata->fd); |
667 | if (ret) { | |
668 | PERROR("close"); | |
669 | } | |
799e2c4f | 670 | } |
c363b55d | 671 | |
f9815039 | 672 | free(metadata->conf); |
c363b55d DG |
673 | free(metadata); |
674 | } | |
675 | ||
050349bb | 676 | /* |
62499ad6 | 677 | * Cleanup kernel session structure |
36b588ed MD |
678 | * |
679 | * Should *NOT* be called with RCU read-side lock held. | |
050349bb | 680 | */ |
62499ad6 | 681 | void trace_kernel_destroy_session(struct ltt_kernel_session *session) |
c363b55d | 682 | { |
af9737e9 | 683 | struct ltt_kernel_channel *channel, *ctmp; |
799e2c4f | 684 | int ret; |
c363b55d | 685 | |
0525e9ae DG |
686 | assert(session); |
687 | ||
33a2b854 | 688 | DBG("[trace] Closing session fd %d", session->fd); |
c363b55d | 689 | /* Close kernel fds */ |
03550b58 MD |
690 | if (session->fd >= 0) { |
691 | ret = close(session->fd); | |
692 | if (ret) { | |
693 | PERROR("close"); | |
694 | } | |
799e2c4f | 695 | } |
f9815039 | 696 | |
03550b58 | 697 | if (session->metadata_stream_fd >= 0) { |
70dc1c34 | 698 | DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd); |
799e2c4f MD |
699 | ret = close(session->metadata_stream_fd); |
700 | if (ret) { | |
701 | PERROR("close"); | |
702 | } | |
70dc1c34 | 703 | } |
c363b55d | 704 | |
d36b8583 | 705 | if (session->metadata != NULL) { |
62499ad6 | 706 | trace_kernel_destroy_metadata(session->metadata); |
d36b8583 | 707 | } |
c363b55d | 708 | |
af9737e9 | 709 | cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) { |
62499ad6 | 710 | trace_kernel_destroy_channel(channel); |
c363b55d DG |
711 | } |
712 | ||
00e2e675 | 713 | /* Wipe consumer output object */ |
6addfa37 | 714 | consumer_output_put(session->consumer); |
00e2e675 | 715 | |
c363b55d DG |
716 | free(session); |
717 | } |