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> | |
82b69413 | 31 | #include <common/trace-chunk.h> |
1e307fab | 32 | |
00e2e675 | 33 | #include "consumer.h" |
62499ad6 | 34 | #include "trace-kernel.h" |
e9404c27 JG |
35 | #include "lttng-sessiond.h" |
36 | #include "notification-thread-commands.h" | |
54012638 | 37 | |
19e70852 | 38 | /* |
050349bb | 39 | * Find the channel name for the given kernel session. |
19e70852 | 40 | */ |
62499ad6 | 41 | struct ltt_kernel_channel *trace_kernel_get_channel_by_name( |
df4f5a87 | 42 | const char *name, struct ltt_kernel_session *session) |
19e70852 DG |
43 | { |
44 | struct ltt_kernel_channel *chan; | |
45 | ||
0525e9ae DG |
46 | assert(session); |
47 | assert(name); | |
19e70852 | 48 | |
85076754 MD |
49 | /* |
50 | * If we receive an empty string for channel name, it means the | |
51 | * default channel name is requested. | |
52 | */ | |
53 | if (name[0] == '\0') | |
54 | name = DEFAULT_CHANNEL_NAME; | |
55 | ||
54d01ffb DG |
56 | DBG("Trying to find channel %s", name); |
57 | ||
19e70852 DG |
58 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
59 | if (strcmp(name, chan->channel->name) == 0) { | |
60 | DBG("Found channel by name %s", name); | |
61 | return chan; | |
62 | } | |
63 | } | |
64 | ||
19e70852 DG |
65 | return NULL; |
66 | } | |
67 | ||
00a62084 MD |
68 | /* |
69 | * Find the event for the given channel. | |
70 | */ | |
71 | struct ltt_kernel_event *trace_kernel_find_event( | |
72 | char *name, struct ltt_kernel_channel *channel, | |
73 | enum lttng_event_type type, | |
74 | struct lttng_filter_bytecode *filter) | |
75 | { | |
76 | struct ltt_kernel_event *ev; | |
77 | int found = 0; | |
78 | ||
79 | assert(name); | |
80 | assert(channel); | |
81 | ||
82 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
83 | if (type != LTTNG_EVENT_ALL && ev->type != type) { | |
84 | continue; | |
85 | } | |
86 | if (strcmp(name, ev->event->name)) { | |
87 | continue; | |
88 | } | |
89 | if ((ev->filter && !filter) || (!ev->filter && filter)) { | |
90 | continue; | |
91 | } | |
92 | if (ev->filter && filter) { | |
93 | if (ev->filter->len != filter->len || | |
94 | memcmp(ev->filter->data, filter->data, | |
95 | filter->len) != 0) { | |
96 | continue; | |
97 | } | |
98 | } | |
99 | found = 1; | |
100 | break; | |
101 | } | |
102 | if (found) { | |
103 | DBG("Found event %s for channel %s", name, | |
104 | channel->channel->name); | |
105 | return ev; | |
106 | } else { | |
107 | return NULL; | |
108 | } | |
109 | } | |
110 | ||
19e70852 | 111 | /* |
050349bb | 112 | * Find the event name for the given channel. |
19e70852 | 113 | */ |
62499ad6 | 114 | struct ltt_kernel_event *trace_kernel_get_event_by_name( |
d0ae4ea8 MD |
115 | char *name, struct ltt_kernel_channel *channel, |
116 | enum lttng_event_type type) | |
19e70852 DG |
117 | { |
118 | struct ltt_kernel_event *ev; | |
00a62084 | 119 | int found = 0; |
19e70852 | 120 | |
0525e9ae DG |
121 | assert(name); |
122 | assert(channel); | |
19e70852 DG |
123 | |
124 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
00a62084 | 125 | if (type != LTTNG_EVENT_ALL && ev->type != type) { |
d0ae4ea8 | 126 | continue; |
19e70852 | 127 | } |
00a62084 MD |
128 | if (strcmp(name, ev->event->name)) { |
129 | continue; | |
130 | } | |
131 | found = 1; | |
132 | break; | |
133 | } | |
134 | if (found) { | |
135 | DBG("Found event %s for channel %s", name, | |
136 | channel->channel->name); | |
137 | return ev; | |
138 | } else { | |
139 | return NULL; | |
19e70852 | 140 | } |
19e70852 DG |
141 | } |
142 | ||
54012638 | 143 | /* |
050349bb | 144 | * Allocate and initialize a kernel session data structure. |
54012638 | 145 | * |
050349bb | 146 | * Return pointer to structure or NULL. |
54012638 | 147 | */ |
dec56f6c | 148 | struct ltt_kernel_session *trace_kernel_create_session(void) |
54012638 | 149 | { |
a4b92340 | 150 | struct ltt_kernel_session *lks = NULL; |
54012638 DG |
151 | |
152 | /* Allocate a new ltt kernel session */ | |
ba7f0ae5 | 153 | lks = zmalloc(sizeof(struct ltt_kernel_session)); |
54012638 | 154 | if (lks == NULL) { |
df0f840b | 155 | PERROR("create kernel session zmalloc"); |
a4b92340 | 156 | goto alloc_error; |
54012638 DG |
157 | } |
158 | ||
159 | /* Init data structure */ | |
03550b58 MD |
160 | lks->fd = -1; |
161 | lks->metadata_stream_fd = -1; | |
54012638 DG |
162 | lks->channel_count = 0; |
163 | lks->stream_count_global = 0; | |
164 | lks->metadata = NULL; | |
165 | CDS_INIT_LIST_HEAD(&lks->channel_list.head); | |
166 | ||
00e2e675 DG |
167 | lks->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
168 | if (lks->consumer == NULL) { | |
169 | goto error; | |
170 | } | |
171 | ||
54012638 DG |
172 | return lks; |
173 | ||
174 | error: | |
a4b92340 DG |
175 | free(lks); |
176 | ||
177 | alloc_error: | |
54012638 DG |
178 | return NULL; |
179 | } | |
180 | ||
181 | /* | |
050349bb | 182 | * Allocate and initialize a kernel channel data structure. |
54012638 | 183 | * |
050349bb | 184 | * Return pointer to structure or NULL. |
54012638 | 185 | */ |
00e2e675 | 186 | struct ltt_kernel_channel *trace_kernel_create_channel( |
fdd9eb17 | 187 | struct lttng_channel *chan) |
54012638 | 188 | { |
54012638 | 189 | struct ltt_kernel_channel *lkc; |
61a5b6b1 | 190 | struct lttng_channel_extended *extended = NULL; |
54012638 | 191 | |
0525e9ae DG |
192 | assert(chan); |
193 | ||
ba7f0ae5 | 194 | lkc = zmalloc(sizeof(struct ltt_kernel_channel)); |
f3ed775e | 195 | if (lkc == NULL) { |
df0f840b | 196 | PERROR("ltt_kernel_channel zmalloc"); |
54012638 DG |
197 | goto error; |
198 | } | |
199 | ||
ba7f0ae5 | 200 | lkc->channel = zmalloc(sizeof(struct lttng_channel)); |
f3ed775e | 201 | if (lkc->channel == NULL) { |
df0f840b | 202 | PERROR("lttng_channel zmalloc"); |
e9404c27 JG |
203 | goto error; |
204 | } | |
205 | ||
206 | extended = zmalloc(sizeof(struct lttng_channel_extended)); | |
207 | if (!extended) { | |
208 | PERROR("lttng_channel_channel zmalloc"); | |
f3ed775e DG |
209 | goto error; |
210 | } | |
211 | memcpy(lkc->channel, chan, sizeof(struct lttng_channel)); | |
e9404c27 JG |
212 | memcpy(extended, chan->attr.extended.ptr, sizeof(struct lttng_channel_extended)); |
213 | lkc->channel->attr.extended.ptr = extended; | |
214 | extended = NULL; | |
54012638 | 215 | |
85076754 MD |
216 | /* |
217 | * If we receive an empty string for channel name, it means the | |
218 | * default channel name is requested. | |
219 | */ | |
220 | if (chan->name[0] == '\0') { | |
221 | strncpy(lkc->channel->name, DEFAULT_CHANNEL_NAME, | |
222 | sizeof(lkc->channel->name)); | |
223 | } | |
bd722d76 | 224 | lkc->channel->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; |
85076754 | 225 | |
03550b58 | 226 | lkc->fd = -1; |
54012638 | 227 | lkc->stream_count = 0; |
cbbbb275 | 228 | lkc->event_count = 0; |
d36b8583 | 229 | lkc->enabled = 1; |
753873bf | 230 | lkc->published_to_notification_thread = false; |
54012638 DG |
231 | /* Init linked list */ |
232 | CDS_INIT_LIST_HEAD(&lkc->events_list.head); | |
233 | CDS_INIT_LIST_HEAD(&lkc->stream_list.head); | |
645328ae | 234 | CDS_INIT_LIST_HEAD(&lkc->ctx_list); |
54012638 DG |
235 | |
236 | return lkc; | |
237 | ||
238 | error: | |
e9404c27 JG |
239 | if (lkc) { |
240 | free(lkc->channel); | |
241 | } | |
242 | free(extended); | |
243 | free(lkc); | |
54012638 DG |
244 | return NULL; |
245 | } | |
246 | ||
645328ae DG |
247 | /* |
248 | * Allocate and init a kernel context object. | |
249 | * | |
250 | * Return the allocated object or NULL on error. | |
251 | */ | |
252 | struct ltt_kernel_context *trace_kernel_create_context( | |
253 | struct lttng_kernel_context *ctx) | |
254 | { | |
255 | struct ltt_kernel_context *kctx; | |
256 | ||
257 | kctx = zmalloc(sizeof(*kctx)); | |
258 | if (!kctx) { | |
259 | PERROR("zmalloc kernel context"); | |
260 | goto error; | |
261 | } | |
262 | ||
263 | if (ctx) { | |
264 | memcpy(&kctx->ctx, ctx, sizeof(kctx->ctx)); | |
265 | } | |
df3c77c8 JG |
266 | error: |
267 | return kctx; | |
268 | } | |
645328ae | 269 | |
df3c77c8 JG |
270 | /* |
271 | * Allocate and init a kernel context object from an existing kernel context | |
272 | * object. | |
273 | * | |
274 | * Return the allocated object or NULL on error. | |
275 | */ | |
276 | struct ltt_kernel_context *trace_kernel_copy_context( | |
277 | struct ltt_kernel_context *kctx) | |
278 | { | |
279 | struct ltt_kernel_context *kctx_copy; | |
280 | ||
281 | assert(kctx); | |
282 | kctx_copy = zmalloc(sizeof(*kctx_copy)); | |
283 | if (!kctx_copy) { | |
284 | PERROR("zmalloc ltt_kernel_context"); | |
285 | goto error; | |
286 | } | |
287 | ||
288 | memcpy(kctx_copy, kctx, sizeof(*kctx_copy)); | |
289 | memset(&kctx_copy->list, 0, sizeof(kctx_copy->list)); | |
7b9445b3 | 290 | |
645328ae | 291 | error: |
df3c77c8 | 292 | return kctx_copy; |
645328ae DG |
293 | } |
294 | ||
54012638 | 295 | /* |
050349bb | 296 | * Allocate and initialize a kernel event. Set name and event type. |
a969e101 | 297 | * We own filter_expression, and filter. |
54012638 | 298 | * |
050349bb | 299 | * Return pointer to structure or NULL. |
54012638 | 300 | */ |
71a3bb01 FD |
301 | enum lttng_error_code trace_kernel_create_event( |
302 | struct lttng_event *ev, char *filter_expression, | |
303 | struct lttng_filter_bytecode *filter, | |
304 | struct ltt_kernel_event **kernel_event) | |
54012638 | 305 | { |
71a3bb01 | 306 | enum lttng_error_code ret; |
54012638 | 307 | struct lttng_kernel_event *attr; |
71a3bb01 | 308 | struct ltt_kernel_event *local_kernel_event; |
dcabc190 | 309 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; |
54012638 | 310 | |
0525e9ae DG |
311 | assert(ev); |
312 | ||
71a3bb01 | 313 | local_kernel_event = zmalloc(sizeof(struct ltt_kernel_event)); |
ba7f0ae5 | 314 | attr = zmalloc(sizeof(struct lttng_kernel_event)); |
71a3bb01 | 315 | if (local_kernel_event == NULL || attr == NULL) { |
df0f840b | 316 | PERROR("kernel event zmalloc"); |
71a3bb01 | 317 | ret = LTTNG_ERR_NOMEM; |
54012638 DG |
318 | goto error; |
319 | } | |
320 | ||
f3ed775e | 321 | switch (ev->type) { |
7d29a247 | 322 | case LTTNG_EVENT_PROBE: |
e6ddca71 | 323 | attr->instrumentation = LTTNG_KERNEL_KPROBE; |
7d29a247 DG |
324 | attr->u.kprobe.addr = ev->attr.probe.addr; |
325 | attr->u.kprobe.offset = ev->attr.probe.offset; | |
f3ed775e | 326 | strncpy(attr->u.kprobe.symbol_name, |
dbbb3ec5 DG |
327 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
328 | attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 329 | break; |
dcabc190 FD |
330 | case LTTNG_EVENT_USERSPACE_PROBE: |
331 | { | |
87597c2c JG |
332 | const struct lttng_userspace_probe_location* location = NULL; |
333 | const struct lttng_userspace_probe_location_lookup_method *lookup = NULL; | |
dcabc190 FD |
334 | |
335 | location = lttng_event_get_userspace_probe_location(ev); | |
336 | if (!location) { | |
337 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
338 | goto error; | |
339 | } | |
340 | ||
341 | /* | |
342 | * From this point on, the specific term 'uprobe' is used | |
343 | * instead of the generic 'userspace probe' because it's the | |
344 | * technology used at the moment for this instrumentation. | |
345 | * LTTng currently implements userspace probes using uprobes. | |
346 | * In the interactions with the kernel tracer, we use the | |
347 | * uprobe term. | |
348 | */ | |
349 | attr->instrumentation = LTTNG_KERNEL_UPROBE; | |
350 | ||
351 | /* | |
352 | * Only the elf lookup method is supported at the moment. | |
353 | */ | |
354 | lookup = lttng_userspace_probe_location_get_lookup_method( | |
355 | location); | |
356 | if (!lookup) { | |
357 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
358 | goto error; | |
359 | } | |
360 | ||
361 | /* | |
362 | * From the kernel tracer's perspective, all userspace probe | |
363 | * event types are all the same: a file and an offset. | |
364 | */ | |
365 | switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) { | |
366 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
367 | /* Get the file descriptor on the target binary. */ | |
368 | attr->u.uprobe.fd = | |
369 | lttng_userspace_probe_location_function_get_binary_fd(location); | |
370 | ||
371 | /* | |
372 | * Save a reference to the probe location used during | |
373 | * the listing of events. Close its FD since it won't | |
374 | * be needed for listing. | |
375 | */ | |
376 | userspace_probe_location = | |
377 | lttng_userspace_probe_location_copy(location); | |
378 | ret = lttng_userspace_probe_location_function_set_binary_fd( | |
379 | userspace_probe_location, -1); | |
380 | if (ret) { | |
381 | goto error; | |
382 | } | |
383 | break; | |
384 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
385 | /* Get the file descriptor on the target binary. */ | |
386 | attr->u.uprobe.fd = | |
387 | lttng_userspace_probe_location_tracepoint_get_binary_fd(location); | |
388 | ||
389 | /* | |
390 | * Save a reference to the probe location used during the listing of | |
391 | * events. Close its FD since it won't be needed for listing. | |
392 | */ | |
393 | userspace_probe_location = | |
394 | lttng_userspace_probe_location_copy(location); | |
395 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
396 | userspace_probe_location, -1); | |
397 | if (ret) { | |
398 | goto error; | |
399 | } | |
400 | break; | |
401 | default: | |
402 | DBG("Unsupported lookup method type"); | |
403 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
404 | goto error; | |
405 | } | |
406 | break; | |
407 | } | |
f3ed775e | 408 | case LTTNG_EVENT_FUNCTION: |
8f0d098b MD |
409 | attr->instrumentation = LTTNG_KERNEL_KRETPROBE; |
410 | attr->u.kretprobe.addr = ev->attr.probe.addr; | |
411 | attr->u.kretprobe.offset = ev->attr.probe.offset; | |
8f0d098b | 412 | strncpy(attr->u.kretprobe.symbol_name, |
dbbb3ec5 DG |
413 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
414 | attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
8f0d098b MD |
415 | break; |
416 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
f3ed775e DG |
417 | attr->instrumentation = LTTNG_KERNEL_FUNCTION; |
418 | strncpy(attr->u.ftrace.symbol_name, | |
dbbb3ec5 DG |
419 | ev->attr.ftrace.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
420 | attr->u.ftrace.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 421 | break; |
e6ddca71 DG |
422 | case LTTNG_EVENT_TRACEPOINT: |
423 | attr->instrumentation = LTTNG_KERNEL_TRACEPOINT; | |
f3ed775e | 424 | break; |
a54bd42d MD |
425 | case LTTNG_EVENT_SYSCALL: |
426 | attr->instrumentation = LTTNG_KERNEL_SYSCALL; | |
0133c199 | 427 | break; |
7a3d1328 MD |
428 | case LTTNG_EVENT_ALL: |
429 | attr->instrumentation = LTTNG_KERNEL_ALL; | |
430 | break; | |
f3ed775e DG |
431 | default: |
432 | ERR("Unknown kernel instrumentation type (%d)", ev->type); | |
71a3bb01 | 433 | ret = LTTNG_ERR_INVALID; |
f3ed775e DG |
434 | goto error; |
435 | } | |
436 | ||
437 | /* Copy event name */ | |
dbbb3ec5 DG |
438 | strncpy(attr->name, ev->name, LTTNG_KERNEL_SYM_NAME_LEN); |
439 | attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 440 | |
54012638 | 441 | /* Setting up a kernel event */ |
71a3bb01 FD |
442 | local_kernel_event->fd = -1; |
443 | local_kernel_event->event = attr; | |
444 | local_kernel_event->enabled = 1; | |
445 | local_kernel_event->filter_expression = filter_expression; | |
446 | local_kernel_event->filter = filter; | |
dcabc190 | 447 | local_kernel_event->userspace_probe_location = userspace_probe_location; |
54012638 | 448 | |
71a3bb01 FD |
449 | *kernel_event = local_kernel_event; |
450 | ||
451 | return LTTNG_OK; | |
54012638 DG |
452 | |
453 | error: | |
a969e101 MD |
454 | free(filter_expression); |
455 | free(filter); | |
71a3bb01 | 456 | free(local_kernel_event); |
a2c0da86 | 457 | free(attr); |
71a3bb01 | 458 | return ret; |
54012638 DG |
459 | } |
460 | ||
461 | /* | |
050349bb | 462 | * Allocate and initialize a kernel metadata. |
54012638 | 463 | * |
050349bb | 464 | * Return pointer to structure or NULL. |
54012638 | 465 | */ |
a4b92340 | 466 | struct ltt_kernel_metadata *trace_kernel_create_metadata(void) |
54012638 | 467 | { |
54012638 | 468 | struct ltt_kernel_metadata *lkm; |
f3ed775e | 469 | struct lttng_channel *chan; |
54012638 | 470 | |
ba7f0ae5 DG |
471 | lkm = zmalloc(sizeof(struct ltt_kernel_metadata)); |
472 | chan = zmalloc(sizeof(struct lttng_channel)); | |
f3ed775e | 473 | if (lkm == NULL || chan == NULL) { |
df0f840b | 474 | PERROR("kernel metadata zmalloc"); |
54012638 DG |
475 | goto error; |
476 | } | |
477 | ||
478 | /* Set default attributes */ | |
f3ed775e | 479 | chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 480 | chan->attr.subbuf_size = default_get_metadata_subbuf_size(); |
b389abbe | 481 | chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
6bb9e85f MD |
482 | chan->attr.switch_timer_interval = DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER; |
483 | chan->attr.read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER; | |
7d452e12 | 484 | chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
54012638 DG |
485 | |
486 | /* Init metadata */ | |
03550b58 | 487 | lkm->fd = -1; |
f3ed775e | 488 | lkm->conf = chan; |
54012638 DG |
489 | |
490 | return lkm; | |
491 | ||
492 | error: | |
a2c0da86 MD |
493 | free(lkm); |
494 | free(chan); | |
54012638 DG |
495 | return NULL; |
496 | } | |
497 | ||
498 | /* | |
050349bb DG |
499 | * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by |
500 | * default. | |
54012638 | 501 | * |
050349bb | 502 | * Return pointer to structure or NULL. |
54012638 | 503 | */ |
00e2e675 DG |
504 | struct ltt_kernel_stream *trace_kernel_create_stream(const char *name, |
505 | unsigned int count) | |
54012638 | 506 | { |
00e2e675 | 507 | int ret; |
54012638 DG |
508 | struct ltt_kernel_stream *lks; |
509 | ||
0525e9ae DG |
510 | assert(name); |
511 | ||
ba7f0ae5 | 512 | lks = zmalloc(sizeof(struct ltt_kernel_stream)); |
54012638 | 513 | if (lks == NULL) { |
df0f840b | 514 | PERROR("kernel stream zmalloc"); |
54012638 DG |
515 | goto error; |
516 | } | |
517 | ||
00e2e675 | 518 | /* Set name */ |
535b8ff4 | 519 | ret = snprintf(lks->name, sizeof(lks->name), "%s_%u", name, count); |
00e2e675 DG |
520 | if (ret < 0) { |
521 | PERROR("snprintf stream name"); | |
522 | goto error; | |
523 | } | |
524 | lks->name[sizeof(lks->name) - 1] = '\0'; | |
525 | ||
54012638 | 526 | /* Init stream */ |
03550b58 | 527 | lks->fd = -1; |
54012638 | 528 | lks->state = 0; |
ffe60014 | 529 | lks->cpu = count; |
54012638 DG |
530 | |
531 | return lks; | |
532 | ||
533 | error: | |
534 | return NULL; | |
535 | } | |
c363b55d | 536 | |
050349bb DG |
537 | /* |
538 | * Cleanup kernel stream structure. | |
539 | */ | |
62499ad6 | 540 | void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream) |
c363b55d | 541 | { |
0525e9ae DG |
542 | assert(stream); |
543 | ||
33a2b854 | 544 | DBG("[trace] Closing stream fd %d", stream->fd); |
c363b55d | 545 | /* Close kernel fd */ |
03550b58 | 546 | if (stream->fd >= 0) { |
c617c0c6 MD |
547 | int ret; |
548 | ||
03550b58 MD |
549 | ret = close(stream->fd); |
550 | if (ret) { | |
551 | PERROR("close"); | |
552 | } | |
799e2c4f | 553 | } |
c363b55d DG |
554 | /* Remove from stream list */ |
555 | cds_list_del(&stream->list); | |
f9815039 | 556 | |
c363b55d DG |
557 | free(stream); |
558 | } | |
559 | ||
050349bb DG |
560 | /* |
561 | * Cleanup kernel event structure. | |
562 | */ | |
62499ad6 | 563 | void trace_kernel_destroy_event(struct ltt_kernel_event *event) |
c363b55d | 564 | { |
0525e9ae DG |
565 | assert(event); |
566 | ||
87eb4ab8 | 567 | if (event->fd >= 0) { |
c617c0c6 MD |
568 | int ret; |
569 | ||
87eb4ab8 MD |
570 | DBG("[trace] Closing event fd %d", event->fd); |
571 | /* Close kernel fd */ | |
799e2c4f MD |
572 | ret = close(event->fd); |
573 | if (ret) { | |
574 | PERROR("close"); | |
575 | } | |
87eb4ab8 MD |
576 | } else { |
577 | DBG("[trace] Tearing down event (no associated fd)"); | |
578 | } | |
c363b55d DG |
579 | |
580 | /* Remove from event list */ | |
581 | cds_list_del(&event->list); | |
f9815039 | 582 | |
00a62084 MD |
583 | free(event->filter_expression); |
584 | free(event->filter); | |
585 | ||
f9815039 | 586 | free(event->event); |
c363b55d DG |
587 | free(event); |
588 | } | |
589 | ||
645328ae DG |
590 | /* |
591 | * Cleanup kernel context structure. | |
592 | */ | |
593 | void trace_kernel_destroy_context(struct ltt_kernel_context *ctx) | |
594 | { | |
595 | assert(ctx); | |
596 | ||
ba985c3a JG |
597 | if (ctx->in_list) { |
598 | cds_list_del(&ctx->list); | |
599 | } | |
645328ae DG |
600 | free(ctx); |
601 | } | |
602 | ||
050349bb DG |
603 | /* |
604 | * Cleanup kernel channel structure. | |
605 | */ | |
62499ad6 | 606 | void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel) |
c363b55d | 607 | { |
af9737e9 DG |
608 | struct ltt_kernel_stream *stream, *stmp; |
609 | struct ltt_kernel_event *event, *etmp; | |
645328ae | 610 | struct ltt_kernel_context *ctx, *ctmp; |
799e2c4f | 611 | int ret; |
e9404c27 | 612 | enum lttng_error_code status; |
c363b55d | 613 | |
0525e9ae DG |
614 | assert(channel); |
615 | ||
33a2b854 | 616 | DBG("[trace] Closing channel fd %d", channel->fd); |
c363b55d | 617 | /* Close kernel fd */ |
03550b58 MD |
618 | if (channel->fd >= 0) { |
619 | ret = close(channel->fd); | |
620 | if (ret) { | |
621 | PERROR("close"); | |
622 | } | |
799e2c4f | 623 | } |
c363b55d DG |
624 | |
625 | /* For each stream in the channel list */ | |
af9737e9 | 626 | cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) { |
62499ad6 | 627 | trace_kernel_destroy_stream(stream); |
c363b55d DG |
628 | } |
629 | ||
630 | /* For each event in the channel list */ | |
af9737e9 | 631 | cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) { |
62499ad6 | 632 | trace_kernel_destroy_event(event); |
c363b55d DG |
633 | } |
634 | ||
645328ae DG |
635 | /* For each context in the channel list */ |
636 | cds_list_for_each_entry_safe(ctx, ctmp, &channel->ctx_list, list) { | |
637 | trace_kernel_destroy_context(ctx); | |
638 | } | |
639 | ||
c363b55d DG |
640 | /* Remove from channel list */ |
641 | cds_list_del(&channel->list); | |
f9815039 | 642 | |
753873bf JR |
643 | if (notification_thread_handle |
644 | && channel->published_to_notification_thread) { | |
63aaa3dc JG |
645 | status = notification_thread_command_remove_channel( |
646 | notification_thread_handle, | |
e1f3997a | 647 | channel->key, LTTNG_DOMAIN_KERNEL); |
63aaa3dc JG |
648 | assert(status == LTTNG_OK); |
649 | } | |
e9404c27 | 650 | free(channel->channel->attr.extended.ptr); |
f9815039 | 651 | free(channel->channel); |
c363b55d DG |
652 | free(channel); |
653 | } | |
654 | ||
050349bb DG |
655 | /* |
656 | * Cleanup kernel metadata structure. | |
657 | */ | |
62499ad6 | 658 | void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata) |
c363b55d | 659 | { |
0525e9ae DG |
660 | assert(metadata); |
661 | ||
33a2b854 | 662 | DBG("[trace] Closing metadata fd %d", metadata->fd); |
c363b55d | 663 | /* Close kernel fd */ |
03550b58 | 664 | if (metadata->fd >= 0) { |
c617c0c6 MD |
665 | int ret; |
666 | ||
03550b58 MD |
667 | ret = close(metadata->fd); |
668 | if (ret) { | |
669 | PERROR("close"); | |
670 | } | |
799e2c4f | 671 | } |
c363b55d | 672 | |
f9815039 | 673 | free(metadata->conf); |
c363b55d DG |
674 | free(metadata); |
675 | } | |
676 | ||
050349bb | 677 | /* |
62499ad6 | 678 | * Cleanup kernel session structure |
36b588ed MD |
679 | * |
680 | * Should *NOT* be called with RCU read-side lock held. | |
050349bb | 681 | */ |
62499ad6 | 682 | void trace_kernel_destroy_session(struct ltt_kernel_session *session) |
c363b55d | 683 | { |
af9737e9 | 684 | struct ltt_kernel_channel *channel, *ctmp; |
799e2c4f | 685 | int ret; |
c363b55d | 686 | |
0525e9ae DG |
687 | assert(session); |
688 | ||
33a2b854 | 689 | DBG("[trace] Closing session fd %d", session->fd); |
c363b55d | 690 | /* Close kernel fds */ |
03550b58 MD |
691 | if (session->fd >= 0) { |
692 | ret = close(session->fd); | |
693 | if (ret) { | |
694 | PERROR("close"); | |
695 | } | |
799e2c4f | 696 | } |
f9815039 | 697 | |
03550b58 | 698 | if (session->metadata_stream_fd >= 0) { |
70dc1c34 | 699 | DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd); |
799e2c4f MD |
700 | ret = close(session->metadata_stream_fd); |
701 | if (ret) { | |
702 | PERROR("close"); | |
703 | } | |
70dc1c34 | 704 | } |
c363b55d | 705 | |
d36b8583 | 706 | if (session->metadata != NULL) { |
62499ad6 | 707 | trace_kernel_destroy_metadata(session->metadata); |
d36b8583 | 708 | } |
c363b55d | 709 | |
af9737e9 | 710 | cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) { |
62499ad6 | 711 | trace_kernel_destroy_channel(channel); |
c363b55d | 712 | } |
d070c424 | 713 | } |
c363b55d | 714 | |
d070c424 MD |
715 | /* Free elements needed by destroy notifiers. */ |
716 | void trace_kernel_free_session(struct ltt_kernel_session *session) | |
717 | { | |
00e2e675 | 718 | /* Wipe consumer output object */ |
6addfa37 | 719 | consumer_output_put(session->consumer); |
00e2e675 | 720 | |
c363b55d DG |
721 | free(session); |
722 | } |