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 | |
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 | |
62499ad6 | 27 | #include "trace-kernel.h" |
54012638 | 28 | |
19e70852 | 29 | /* |
050349bb | 30 | * Find the channel name for the given kernel session. |
19e70852 | 31 | */ |
62499ad6 | 32 | struct ltt_kernel_channel *trace_kernel_get_channel_by_name( |
19e70852 DG |
33 | char *name, struct ltt_kernel_session *session) |
34 | { | |
35 | struct ltt_kernel_channel *chan; | |
36 | ||
37 | if (session == NULL) { | |
38 | ERR("Undefine session"); | |
39 | goto error; | |
40 | } | |
41 | ||
54d01ffb DG |
42 | DBG("Trying to find channel %s", name); |
43 | ||
19e70852 DG |
44 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
45 | if (strcmp(name, chan->channel->name) == 0) { | |
46 | DBG("Found channel by name %s", name); | |
47 | return chan; | |
48 | } | |
49 | } | |
50 | ||
51 | error: | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | /* | |
050349bb | 56 | * Find the event name for the given channel. |
19e70852 | 57 | */ |
62499ad6 | 58 | struct ltt_kernel_event *trace_kernel_get_event_by_name( |
19e70852 DG |
59 | char *name, struct ltt_kernel_channel *channel) |
60 | { | |
61 | struct ltt_kernel_event *ev; | |
62 | ||
63 | if (channel == NULL) { | |
64 | ERR("Undefine channel"); | |
65 | goto error; | |
66 | } | |
67 | ||
68 | cds_list_for_each_entry(ev, &channel->events_list.head, list) { | |
69 | if (strcmp(name, ev->event->name) == 0) { | |
70 | DBG("Found event by name %s for channel %s", name, | |
71 | channel->channel->name); | |
72 | return ev; | |
73 | } | |
74 | } | |
75 | ||
76 | error: | |
77 | return NULL; | |
78 | } | |
79 | ||
54012638 | 80 | /* |
050349bb | 81 | * Allocate and initialize a kernel session data structure. |
54012638 | 82 | * |
050349bb | 83 | * Return pointer to structure or NULL. |
54012638 | 84 | */ |
f9815039 | 85 | struct ltt_kernel_session *trace_kernel_create_session(char *path) |
54012638 | 86 | { |
f9815039 | 87 | int ret; |
54012638 DG |
88 | struct ltt_kernel_session *lks; |
89 | ||
90 | /* Allocate a new ltt kernel session */ | |
ba7f0ae5 | 91 | lks = zmalloc(sizeof(struct ltt_kernel_session)); |
54012638 | 92 | if (lks == NULL) { |
df0f840b | 93 | PERROR("create kernel session zmalloc"); |
54012638 DG |
94 | goto error; |
95 | } | |
96 | ||
97 | /* Init data structure */ | |
03550b58 MD |
98 | lks->fd = -1; |
99 | lks->metadata_stream_fd = -1; | |
54012638 DG |
100 | lks->channel_count = 0; |
101 | lks->stream_count_global = 0; | |
102 | lks->metadata = NULL; | |
03550b58 | 103 | lks->consumer_fd = -1; |
54012638 DG |
104 | CDS_INIT_LIST_HEAD(&lks->channel_list.head); |
105 | ||
f9815039 DG |
106 | /* Set session path */ |
107 | ret = asprintf(&lks->trace_path, "%s/kernel", path); | |
108 | if (ret < 0) { | |
df0f840b | 109 | PERROR("asprintf kernel traces path"); |
f9815039 DG |
110 | goto error; |
111 | } | |
112 | ||
54012638 DG |
113 | return lks; |
114 | ||
115 | error: | |
116 | return NULL; | |
117 | } | |
118 | ||
119 | /* | |
050349bb | 120 | * Allocate and initialize a kernel channel data structure. |
54012638 | 121 | * |
050349bb | 122 | * Return pointer to structure or NULL. |
54012638 | 123 | */ |
62499ad6 | 124 | struct ltt_kernel_channel *trace_kernel_create_channel(struct lttng_channel *chan, char *path) |
54012638 DG |
125 | { |
126 | int ret; | |
127 | struct ltt_kernel_channel *lkc; | |
54012638 | 128 | |
ba7f0ae5 | 129 | lkc = zmalloc(sizeof(struct ltt_kernel_channel)); |
f3ed775e | 130 | if (lkc == NULL) { |
df0f840b | 131 | PERROR("ltt_kernel_channel zmalloc"); |
54012638 DG |
132 | goto error; |
133 | } | |
134 | ||
ba7f0ae5 | 135 | lkc->channel = zmalloc(sizeof(struct lttng_channel)); |
f3ed775e | 136 | if (lkc->channel == NULL) { |
df0f840b | 137 | PERROR("lttng_channel zmalloc"); |
f3ed775e DG |
138 | goto error; |
139 | } | |
140 | memcpy(lkc->channel, chan, sizeof(struct lttng_channel)); | |
54012638 | 141 | |
03550b58 | 142 | lkc->fd = -1; |
54012638 | 143 | lkc->stream_count = 0; |
cbbbb275 | 144 | lkc->event_count = 0; |
d36b8583 | 145 | lkc->enabled = 1; |
e75cda3a | 146 | lkc->ctx = NULL; |
54012638 DG |
147 | /* Init linked list */ |
148 | CDS_INIT_LIST_HEAD(&lkc->events_list.head); | |
149 | CDS_INIT_LIST_HEAD(&lkc->stream_list.head); | |
150 | /* Set default trace output path */ | |
b082db07 | 151 | ret = asprintf(&lkc->pathname, "%s", path); |
54012638 | 152 | if (ret < 0) { |
df0f840b | 153 | PERROR("asprintf kernel create channel"); |
54012638 DG |
154 | goto error; |
155 | } | |
156 | ||
157 | return lkc; | |
158 | ||
159 | error: | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* | |
050349bb | 164 | * Allocate and initialize a kernel event. Set name and event type. |
54012638 | 165 | * |
050349bb | 166 | * Return pointer to structure or NULL. |
54012638 | 167 | */ |
62499ad6 | 168 | struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev) |
54012638 DG |
169 | { |
170 | struct ltt_kernel_event *lke; | |
171 | struct lttng_kernel_event *attr; | |
172 | ||
ba7f0ae5 DG |
173 | lke = zmalloc(sizeof(struct ltt_kernel_event)); |
174 | attr = zmalloc(sizeof(struct lttng_kernel_event)); | |
54012638 | 175 | if (lke == NULL || attr == NULL) { |
df0f840b | 176 | PERROR("kernel event zmalloc"); |
54012638 DG |
177 | goto error; |
178 | } | |
179 | ||
f3ed775e | 180 | switch (ev->type) { |
7d29a247 | 181 | case LTTNG_EVENT_PROBE: |
e6ddca71 | 182 | attr->instrumentation = LTTNG_KERNEL_KPROBE; |
7d29a247 DG |
183 | attr->u.kprobe.addr = ev->attr.probe.addr; |
184 | attr->u.kprobe.offset = ev->attr.probe.offset; | |
f3ed775e | 185 | strncpy(attr->u.kprobe.symbol_name, |
dbbb3ec5 DG |
186 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
187 | attr->u.kprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e DG |
188 | break; |
189 | case LTTNG_EVENT_FUNCTION: | |
8f0d098b MD |
190 | attr->instrumentation = LTTNG_KERNEL_KRETPROBE; |
191 | attr->u.kretprobe.addr = ev->attr.probe.addr; | |
192 | attr->u.kretprobe.offset = ev->attr.probe.offset; | |
193 | attr->u.kretprobe.offset = ev->attr.probe.offset; | |
194 | strncpy(attr->u.kretprobe.symbol_name, | |
dbbb3ec5 DG |
195 | ev->attr.probe.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
196 | attr->u.kretprobe.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
8f0d098b MD |
197 | break; |
198 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
f3ed775e DG |
199 | attr->instrumentation = LTTNG_KERNEL_FUNCTION; |
200 | strncpy(attr->u.ftrace.symbol_name, | |
dbbb3ec5 DG |
201 | ev->attr.ftrace.symbol_name, LTTNG_KERNEL_SYM_NAME_LEN); |
202 | attr->u.ftrace.symbol_name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 203 | break; |
e6ddca71 DG |
204 | case LTTNG_EVENT_TRACEPOINT: |
205 | attr->instrumentation = LTTNG_KERNEL_TRACEPOINT; | |
f3ed775e | 206 | break; |
a54bd42d MD |
207 | case LTTNG_EVENT_SYSCALL: |
208 | attr->instrumentation = LTTNG_KERNEL_SYSCALL; | |
0133c199 | 209 | break; |
7a3d1328 MD |
210 | case LTTNG_EVENT_ALL: |
211 | attr->instrumentation = LTTNG_KERNEL_ALL; | |
212 | break; | |
f3ed775e DG |
213 | default: |
214 | ERR("Unknown kernel instrumentation type (%d)", ev->type); | |
215 | goto error; | |
216 | } | |
217 | ||
218 | /* Copy event name */ | |
dbbb3ec5 DG |
219 | strncpy(attr->name, ev->name, LTTNG_KERNEL_SYM_NAME_LEN); |
220 | attr->name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0'; | |
f3ed775e | 221 | |
54012638 | 222 | /* Setting up a kernel event */ |
03550b58 | 223 | lke->fd = -1; |
54012638 | 224 | lke->event = attr; |
d36b8583 | 225 | lke->enabled = 1; |
e75cda3a | 226 | lke->ctx = NULL; |
54012638 DG |
227 | |
228 | return lke; | |
229 | ||
230 | error: | |
a2c0da86 MD |
231 | free(lke); |
232 | free(attr); | |
54012638 DG |
233 | return NULL; |
234 | } | |
235 | ||
236 | /* | |
050349bb | 237 | * Allocate and initialize a kernel metadata. |
54012638 | 238 | * |
050349bb | 239 | * Return pointer to structure or NULL. |
54012638 | 240 | */ |
62499ad6 | 241 | struct ltt_kernel_metadata *trace_kernel_create_metadata(char *path) |
54012638 DG |
242 | { |
243 | int ret; | |
244 | struct ltt_kernel_metadata *lkm; | |
f3ed775e | 245 | struct lttng_channel *chan; |
54012638 | 246 | |
ba7f0ae5 DG |
247 | lkm = zmalloc(sizeof(struct ltt_kernel_metadata)); |
248 | chan = zmalloc(sizeof(struct lttng_channel)); | |
f3ed775e | 249 | if (lkm == NULL || chan == NULL) { |
df0f840b | 250 | PERROR("kernel metadata zmalloc"); |
54012638 DG |
251 | goto error; |
252 | } | |
253 | ||
254 | /* Set default attributes */ | |
f3ed775e | 255 | chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
b389abbe MD |
256 | chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE; |
257 | chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
f3ed775e DG |
258 | chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; |
259 | chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
7d452e12 | 260 | chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; |
54012638 DG |
261 | |
262 | /* Init metadata */ | |
03550b58 | 263 | lkm->fd = -1; |
f3ed775e | 264 | lkm->conf = chan; |
54012638 | 265 | /* Set default metadata path */ |
58a97671 | 266 | ret = asprintf(&lkm->pathname, "%s/metadata", path); |
54012638 | 267 | if (ret < 0) { |
df0f840b | 268 | PERROR("asprintf kernel metadata"); |
54012638 DG |
269 | goto error; |
270 | } | |
271 | ||
272 | return lkm; | |
273 | ||
274 | error: | |
a2c0da86 MD |
275 | free(lkm); |
276 | free(chan); | |
54012638 DG |
277 | return NULL; |
278 | } | |
279 | ||
280 | /* | |
050349bb DG |
281 | * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by |
282 | * default. | |
54012638 | 283 | * |
050349bb | 284 | * Return pointer to structure or NULL. |
54012638 | 285 | */ |
62499ad6 | 286 | struct ltt_kernel_stream *trace_kernel_create_stream(void) |
54012638 DG |
287 | { |
288 | struct ltt_kernel_stream *lks; | |
289 | ||
ba7f0ae5 | 290 | lks = zmalloc(sizeof(struct ltt_kernel_stream)); |
54012638 | 291 | if (lks == NULL) { |
df0f840b | 292 | PERROR("kernel stream zmalloc"); |
54012638 DG |
293 | goto error; |
294 | } | |
295 | ||
296 | /* Init stream */ | |
03550b58 | 297 | lks->fd = -1; |
54012638 DG |
298 | lks->pathname = NULL; |
299 | lks->state = 0; | |
300 | ||
301 | return lks; | |
302 | ||
303 | error: | |
304 | return NULL; | |
305 | } | |
c363b55d | 306 | |
050349bb DG |
307 | /* |
308 | * Cleanup kernel stream structure. | |
309 | */ | |
62499ad6 | 310 | void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream) |
c363b55d | 311 | { |
799e2c4f MD |
312 | int ret; |
313 | ||
33a2b854 | 314 | DBG("[trace] Closing stream fd %d", stream->fd); |
c363b55d | 315 | /* Close kernel fd */ |
03550b58 MD |
316 | if (stream->fd >= 0) { |
317 | ret = close(stream->fd); | |
318 | if (ret) { | |
319 | PERROR("close"); | |
320 | } | |
799e2c4f | 321 | } |
c363b55d DG |
322 | /* Remove from stream list */ |
323 | cds_list_del(&stream->list); | |
f9815039 DG |
324 | |
325 | free(stream->pathname); | |
c363b55d DG |
326 | free(stream); |
327 | } | |
328 | ||
050349bb DG |
329 | /* |
330 | * Cleanup kernel event structure. | |
331 | */ | |
62499ad6 | 332 | void trace_kernel_destroy_event(struct ltt_kernel_event *event) |
c363b55d | 333 | { |
799e2c4f MD |
334 | int ret; |
335 | ||
87eb4ab8 MD |
336 | if (event->fd >= 0) { |
337 | DBG("[trace] Closing event fd %d", event->fd); | |
338 | /* Close kernel fd */ | |
799e2c4f MD |
339 | ret = close(event->fd); |
340 | if (ret) { | |
341 | PERROR("close"); | |
342 | } | |
87eb4ab8 MD |
343 | } else { |
344 | DBG("[trace] Tearing down event (no associated fd)"); | |
345 | } | |
c363b55d DG |
346 | |
347 | /* Remove from event list */ | |
348 | cds_list_del(&event->list); | |
f9815039 DG |
349 | |
350 | free(event->event); | |
351 | free(event->ctx); | |
c363b55d DG |
352 | free(event); |
353 | } | |
354 | ||
050349bb DG |
355 | /* |
356 | * Cleanup kernel channel structure. | |
357 | */ | |
62499ad6 | 358 | void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel) |
c363b55d | 359 | { |
af9737e9 DG |
360 | struct ltt_kernel_stream *stream, *stmp; |
361 | struct ltt_kernel_event *event, *etmp; | |
799e2c4f | 362 | int ret; |
c363b55d | 363 | |
33a2b854 | 364 | DBG("[trace] Closing channel fd %d", channel->fd); |
c363b55d | 365 | /* Close kernel fd */ |
03550b58 MD |
366 | if (channel->fd >= 0) { |
367 | ret = close(channel->fd); | |
368 | if (ret) { | |
369 | PERROR("close"); | |
370 | } | |
799e2c4f | 371 | } |
c363b55d DG |
372 | |
373 | /* For each stream in the channel list */ | |
af9737e9 | 374 | cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) { |
62499ad6 | 375 | trace_kernel_destroy_stream(stream); |
c363b55d DG |
376 | } |
377 | ||
378 | /* For each event in the channel list */ | |
af9737e9 | 379 | cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) { |
62499ad6 | 380 | trace_kernel_destroy_event(event); |
c363b55d DG |
381 | } |
382 | ||
383 | /* Remove from channel list */ | |
384 | cds_list_del(&channel->list); | |
f9815039 DG |
385 | |
386 | free(channel->pathname); | |
387 | free(channel->channel); | |
388 | free(channel->ctx); | |
c363b55d DG |
389 | free(channel); |
390 | } | |
391 | ||
050349bb DG |
392 | /* |
393 | * Cleanup kernel metadata structure. | |
394 | */ | |
62499ad6 | 395 | void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata) |
c363b55d | 396 | { |
799e2c4f MD |
397 | int ret; |
398 | ||
33a2b854 | 399 | DBG("[trace] Closing metadata fd %d", metadata->fd); |
c363b55d | 400 | /* Close kernel fd */ |
03550b58 MD |
401 | if (metadata->fd >= 0) { |
402 | ret = close(metadata->fd); | |
403 | if (ret) { | |
404 | PERROR("close"); | |
405 | } | |
799e2c4f | 406 | } |
c363b55d | 407 | |
f9815039 DG |
408 | free(metadata->conf); |
409 | free(metadata->pathname); | |
c363b55d DG |
410 | free(metadata); |
411 | } | |
412 | ||
050349bb | 413 | /* |
62499ad6 | 414 | * Cleanup kernel session structure |
050349bb | 415 | */ |
62499ad6 | 416 | void trace_kernel_destroy_session(struct ltt_kernel_session *session) |
c363b55d | 417 | { |
af9737e9 | 418 | struct ltt_kernel_channel *channel, *ctmp; |
799e2c4f | 419 | int ret; |
c363b55d | 420 | |
33a2b854 | 421 | DBG("[trace] Closing session fd %d", session->fd); |
c363b55d | 422 | /* Close kernel fds */ |
03550b58 MD |
423 | if (session->fd >= 0) { |
424 | ret = close(session->fd); | |
425 | if (ret) { | |
426 | PERROR("close"); | |
427 | } | |
799e2c4f | 428 | } |
f9815039 | 429 | |
03550b58 | 430 | if (session->metadata_stream_fd >= 0) { |
70dc1c34 | 431 | DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd); |
799e2c4f MD |
432 | ret = close(session->metadata_stream_fd); |
433 | if (ret) { | |
434 | PERROR("close"); | |
435 | } | |
70dc1c34 | 436 | } |
c363b55d | 437 | |
d36b8583 | 438 | if (session->metadata != NULL) { |
62499ad6 | 439 | trace_kernel_destroy_metadata(session->metadata); |
d36b8583 | 440 | } |
c363b55d | 441 | |
af9737e9 | 442 | cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) { |
62499ad6 | 443 | trace_kernel_destroy_channel(channel); |
c363b55d DG |
444 | } |
445 | ||
f9815039 | 446 | free(session->trace_path); |
c363b55d DG |
447 | free(session); |
448 | } |