Commit | Line | Data |
---|---|---|
096102bd DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com> | |
fbb9748b | 3 | * 2014 - Jan Glauber <jan.glauber@gmail.com> |
096102bd | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
096102bd | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
096102bd | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
096102bd DG |
17 | */ |
18 | ||
d11b2027 MJ |
19 | /** |
20 | * @file modprobe.c | |
21 | * | |
22 | * @brief modprobe related functions. | |
23 | * | |
24 | */ | |
25 | ||
6c1c0768 | 26 | #define _LGPL_SOURCE |
c9d42407 | 27 | #include <assert.h> |
096102bd DG |
28 | #include <stdio.h> |
29 | #include <stdlib.h> | |
30 | #include <sys/wait.h> | |
31 | ||
32 | #include <common/common.h> | |
fbb9748b | 33 | #include <common/utils.h> |
096102bd DG |
34 | |
35 | #include "modprobe.h" | |
36 | #include "kern-modules.h" | |
37 | ||
ab57d7d3 JG |
38 | #define LTTNG_MOD_REQUIRED 1 |
39 | #define LTTNG_MOD_OPTIONAL 0 | |
40 | ||
41 | /* LTTng kernel tracer mandatory core modules list */ | |
42 | struct kern_modules_param kern_modules_control_core[] = { | |
ab57d7d3 JG |
43 | { "lttng-ring-buffer-client-discard" }, |
44 | { "lttng-ring-buffer-client-overwrite" }, | |
45 | { "lttng-ring-buffer-metadata-client" }, | |
46 | { "lttng-ring-buffer-client-mmap-discard" }, | |
47 | { "lttng-ring-buffer-client-mmap-overwrite" }, | |
48 | { "lttng-ring-buffer-metadata-mmap-client" }, | |
49 | }; | |
50 | ||
3fa9646c | 51 | /* LTTng kernel tracer probe modules list */ |
fbb9748b | 52 | struct kern_modules_param kern_modules_probes_default[] = { |
ab57d7d3 JG |
53 | { "lttng-probe-asoc" }, |
54 | { "lttng-probe-block" }, | |
55 | { "lttng-probe-btrfs" }, | |
56 | { "lttng-probe-compaction" }, | |
57 | { "lttng-probe-ext3" }, | |
58 | { "lttng-probe-ext4" }, | |
59 | { "lttng-probe-gpio" }, | |
0b1c5ad5 | 60 | { "lttng-probe-i2c" }, |
ab57d7d3 JG |
61 | { "lttng-probe-irq" }, |
62 | { "lttng-probe-jbd" }, | |
63 | { "lttng-probe-jbd2" }, | |
64 | { "lttng-probe-kmem" }, | |
65 | { "lttng-probe-kvm" }, | |
66 | { "lttng-probe-kvm-x86" }, | |
67 | { "lttng-probe-kvm-x86-mmu" }, | |
68 | { "lttng-probe-lock" }, | |
69 | { "lttng-probe-module" }, | |
70 | { "lttng-probe-napi" }, | |
71 | { "lttng-probe-net" }, | |
72 | { "lttng-probe-power" }, | |
73 | { "lttng-probe-printk" }, | |
74 | { "lttng-probe-random" }, | |
75 | { "lttng-probe-rcu" }, | |
76 | { "lttng-probe-regmap" }, | |
77 | { "lttng-probe-regulator" }, | |
78 | { "lttng-probe-rpm" }, | |
79 | { "lttng-probe-sched" }, | |
80 | { "lttng-probe-scsi" }, | |
81 | { "lttng-probe-signal" }, | |
82 | { "lttng-probe-skb" }, | |
83 | { "lttng-probe-sock" }, | |
84 | { "lttng-probe-statedump" }, | |
85 | { "lttng-probe-sunrpc" }, | |
86 | { "lttng-probe-timer" }, | |
87 | { "lttng-probe-udp" }, | |
88 | { "lttng-probe-vmscan" }, | |
89 | { "lttng-probe-v4l2" }, | |
90 | { "lttng-probe-workqueue" }, | |
91 | { "lttng-probe-writeback" }, | |
c66dfab8 | 92 | { "lttng-probe-x86-irq-vectors" }, |
037e00be | 93 | { "lttng-probe-x86-exceptions" }, |
096102bd DG |
94 | }; |
95 | ||
fbb9748b JG |
96 | /* dynamic probe modules list */ |
97 | static struct kern_modules_param *probes; | |
98 | static int nr_probes; | |
c9d42407 | 99 | static int probes_capacity; |
fbb9748b | 100 | |
234170ac UTL |
101 | #if HAVE_KMOD |
102 | #include <libkmod.h> | |
866c17ce | 103 | |
d11b2027 MJ |
104 | /** |
105 | * @brief Logging function for libkmod integration. | |
106 | */ | |
234170ac UTL |
107 | static void log_kmod(void *data, int priority, const char *file, int line, |
108 | const char *fn, const char *format, va_list args) | |
109 | { | |
110 | char *str; | |
111 | ||
112 | if (vasprintf(&str, format, args) < 0) { | |
113 | return; | |
114 | } | |
115 | ||
116 | DBG("libkmod: %s", str); | |
117 | free(str); | |
118 | } | |
866c17ce | 119 | |
d11b2027 MJ |
120 | /** |
121 | * @brief Setup the libkmod context. | |
122 | * | |
123 | * Create the context, add a custom logging function and preload the | |
124 | * ressources for faster operation. | |
125 | * | |
126 | * @returns \c 0 on success | |
127 | * \c < 0 on error | |
128 | */ | |
866c17ce | 129 | static int setup_kmod_ctx(struct kmod_ctx **ctx) |
234170ac | 130 | { |
866c17ce | 131 | int ret = 0; |
234170ac | 132 | |
866c17ce | 133 | *ctx = kmod_new(NULL, NULL); |
234170ac UTL |
134 | if (!ctx) { |
135 | PERROR("Unable to create kmod library context"); | |
136 | ret = -ENOMEM; | |
137 | goto error; | |
138 | } | |
139 | ||
866c17ce MJ |
140 | kmod_set_log_fn(*ctx, log_kmod, NULL); |
141 | ret = kmod_load_resources(*ctx); | |
142 | if (ret < 0) { | |
143 | ERR("Failed to load kmod library resources"); | |
144 | goto error; | |
145 | } | |
146 | ||
147 | error: | |
148 | return ret; | |
149 | } | |
150 | ||
d11b2027 MJ |
151 | /** |
152 | * @brief Loads the kernel modules in \p modules | |
153 | * | |
154 | * @param modules List of modules to load | |
155 | * @param entries Number of modules in the list | |
156 | * @param required Are the modules required or optionnal | |
157 | * | |
158 | * If the modules are required, we will return with error after the | |
159 | * first failed module load, otherwise we continue loading. | |
160 | * | |
161 | * @returns \c 0 on success | |
162 | * \c < 0 on error | |
163 | */ | |
866c17ce MJ |
164 | static int modprobe_lttng(struct kern_modules_param *modules, |
165 | int entries, int required) | |
166 | { | |
167 | int ret = 0, i; | |
168 | struct kmod_ctx *ctx; | |
169 | ||
170 | ret = setup_kmod_ctx(&ctx); | |
171 | if (ret < 0) { | |
172 | goto error; | |
173 | } | |
234170ac UTL |
174 | |
175 | for (i = 0; i < entries; i++) { | |
176 | struct kmod_module *mod = NULL; | |
177 | ||
178 | ret = kmod_module_new_from_name(ctx, modules[i].name, &mod); | |
179 | if (ret < 0) { | |
180 | PERROR("Failed to create kmod module for %s", modules[i].name); | |
181 | goto error; | |
182 | } | |
183 | ||
0b1e16b8 | 184 | ret = kmod_module_probe_insert_module(mod, 0, |
234170ac | 185 | NULL, NULL, NULL, NULL); |
0b1e16b8 MJ |
186 | if (ret == -EEXIST) { |
187 | DBG("Module %s is already loaded", modules[i].name); | |
188 | ret = 0; | |
189 | } else if (ret < 0) { | |
16c2e854 PP |
190 | if (required) { |
191 | ERR("Unable to load required module %s", | |
192 | modules[i].name); | |
193 | goto error; | |
194 | } else { | |
195 | DBG("Unable to load optional module %s; continuing", | |
196 | modules[i].name); | |
197 | ret = 0; | |
198 | } | |
234170ac UTL |
199 | } else { |
200 | DBG("Modprobe successfully %s", modules[i].name); | |
4ad664a0 | 201 | modules[i].loaded = true; |
234170ac UTL |
202 | } |
203 | ||
204 | kmod_module_unref(mod); | |
205 | } | |
206 | ||
207 | error: | |
208 | if (ctx) { | |
209 | kmod_unref(ctx); | |
210 | } | |
211 | return ret; | |
212 | } | |
213 | ||
d11b2027 MJ |
214 | /** |
215 | * @brief Recursively unload modules. | |
216 | * | |
217 | * This function implements the same modules unloading behavior as | |
218 | * 'modprobe -r' or rmmod, it will recursevily go trought the \p module | |
219 | * dependencies and unload modules with a refcount of 0. | |
220 | * | |
221 | * @param mod The module to unload | |
222 | * | |
223 | * @returns \c 0 on success | |
224 | * \c < 0 on error | |
225 | */ | |
866c17ce MJ |
226 | static int rmmod_recurse(struct kmod_module *mod) { |
227 | int ret = 0; | |
228 | struct kmod_list *deps, *itr; | |
229 | ||
230 | if (kmod_module_get_initstate(mod) == KMOD_MODULE_BUILTIN) { | |
231 | DBG("Module %s is builtin", kmod_module_get_name(mod)); | |
232 | return ret; | |
233 | } | |
234 | ||
235 | ret = kmod_module_remove_module(mod, 0); | |
236 | ||
237 | deps = kmod_module_get_dependencies(mod); | |
238 | if (deps != NULL) { | |
239 | kmod_list_foreach(itr, deps) { | |
240 | struct kmod_module *dep = kmod_module_get_module(itr); | |
241 | if (kmod_module_get_refcnt(dep) == 0) { | |
242 | DBG("Recursive remove module %s", | |
243 | kmod_module_get_name(dep)); | |
244 | rmmod_recurse(dep); | |
245 | } | |
246 | kmod_module_unref(dep); | |
247 | } | |
248 | kmod_module_unref_list(deps); | |
249 | } | |
250 | ||
251 | return ret; | |
252 | } | |
253 | ||
d11b2027 MJ |
254 | /** |
255 | * @brief Unloads the kernel modules in \p modules | |
256 | * | |
257 | * @param modules List of modules to unload | |
258 | * @param entries Number of modules in the list | |
259 | * @param required Are the modules required or optionnal | |
260 | * | |
261 | */ | |
866c17ce MJ |
262 | static void modprobe_remove_lttng(const struct kern_modules_param *modules, |
263 | int entries, int required) | |
264 | { | |
265 | int ret = 0, i; | |
266 | struct kmod_ctx *ctx; | |
267 | ||
268 | ret = setup_kmod_ctx(&ctx); | |
269 | if (ret < 0) { | |
270 | goto error; | |
271 | } | |
272 | ||
273 | for (i = entries - 1; i >= 0; i--) { | |
274 | struct kmod_module *mod = NULL; | |
275 | ||
4ad664a0 JG |
276 | if (!modules[i].loaded) { |
277 | continue; | |
278 | } | |
279 | ||
866c17ce MJ |
280 | ret = kmod_module_new_from_name(ctx, modules[i].name, &mod); |
281 | if (ret < 0) { | |
282 | PERROR("Failed to create kmod module for %s", modules[i].name); | |
283 | goto error; | |
284 | } | |
285 | ||
286 | ret = rmmod_recurse(mod); | |
287 | if (ret == -EEXIST) { | |
288 | DBG("Module %s is not in kernel.", modules[i].name); | |
289 | } else if (required && ret < 0) { | |
290 | ERR("Unable to remove module %s", modules[i].name); | |
291 | } else { | |
292 | DBG("Modprobe removal successful %s", | |
293 | modules[i].name); | |
294 | } | |
295 | ||
296 | kmod_module_unref(mod); | |
297 | } | |
298 | ||
299 | error: | |
300 | if (ctx) { | |
301 | kmod_unref(ctx); | |
302 | } | |
303 | } | |
304 | ||
234170ac UTL |
305 | #else /* HAVE_KMOD */ |
306 | ||
fbb9748b | 307 | static int modprobe_lttng(struct kern_modules_param *modules, |
234170ac | 308 | int entries, int required) |
096102bd DG |
309 | { |
310 | int ret = 0, i; | |
311 | char modprobe[256]; | |
312 | ||
e23b81ed | 313 | for (i = 0; i < entries; i++) { |
096102bd DG |
314 | ret = snprintf(modprobe, sizeof(modprobe), |
315 | "/sbin/modprobe %s%s", | |
ab57d7d3 | 316 | required ? "" : "-q ", |
e23b81ed | 317 | modules[i].name); |
096102bd DG |
318 | if (ret < 0) { |
319 | PERROR("snprintf modprobe"); | |
320 | goto error; | |
321 | } | |
322 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
323 | ret = system(modprobe); | |
324 | if (ret == -1) { | |
16c2e854 PP |
325 | if (required) { |
326 | ERR("Unable to launch modprobe for required module %s", | |
327 | modules[i].name); | |
328 | goto error; | |
329 | } else { | |
330 | DBG("Unable to launch modprobe for optional module %s; continuing", | |
331 | modules[i].name); | |
332 | ret = 0; | |
333 | } | |
334 | } else if (WEXITSTATUS(ret) != 0) { | |
335 | if (required) { | |
336 | ERR("Unable to load required module %s", | |
337 | modules[i].name); | |
338 | goto error; | |
339 | } else { | |
340 | DBG("Unable to load optional module %s; continuing", | |
341 | modules[i].name); | |
342 | ret = 0; | |
343 | } | |
096102bd | 344 | } else { |
ab57d7d3 | 345 | DBG("Modprobe successfully %s", modules[i].name); |
355d2778 | 346 | modules[i].loaded = true; |
096102bd DG |
347 | } |
348 | } | |
349 | ||
350 | error: | |
351 | return ret; | |
352 | } | |
353 | ||
35e090b7 MJ |
354 | static void modprobe_remove_lttng(const struct kern_modules_param *modules, |
355 | int entries, int required) | |
356 | { | |
357 | int ret = 0, i; | |
358 | char modprobe[256]; | |
359 | ||
360 | for (i = entries - 1; i >= 0; i--) { | |
4ad664a0 JG |
361 | if (!modules[i].loaded) { |
362 | continue; | |
363 | } | |
35e090b7 MJ |
364 | ret = snprintf(modprobe, sizeof(modprobe), |
365 | "/sbin/modprobe -r -q %s", | |
366 | modules[i].name); | |
367 | if (ret < 0) { | |
368 | PERROR("snprintf modprobe -r"); | |
369 | return; | |
370 | } | |
371 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
372 | ret = system(modprobe); | |
373 | if (ret == -1) { | |
374 | ERR("Unable to launch modprobe -r for module %s", | |
375 | modules[i].name); | |
376 | } else if (required && WEXITSTATUS(ret) != 0) { | |
377 | ERR("Unable to remove module %s", | |
378 | modules[i].name); | |
379 | } else { | |
380 | DBG("Modprobe removal successful %s", | |
381 | modules[i].name); | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
866c17ce MJ |
386 | #endif /* HAVE_KMOD */ |
387 | ||
35e090b7 MJ |
388 | /* |
389 | * Remove control kernel module(s) in reverse load order. | |
390 | */ | |
391 | void modprobe_remove_lttng_control(void) | |
392 | { | |
393 | modprobe_remove_lttng(kern_modules_control_core, | |
394 | ARRAY_SIZE(kern_modules_control_core), | |
395 | LTTNG_MOD_REQUIRED); | |
396 | } | |
397 | ||
398 | static void free_probes(void) | |
399 | { | |
400 | int i; | |
401 | ||
402 | if (!probes) { | |
403 | return; | |
404 | } | |
405 | for (i = 0; i < nr_probes; ++i) { | |
406 | free(probes[i].name); | |
407 | } | |
408 | free(probes); | |
409 | probes = NULL; | |
410 | nr_probes = 0; | |
411 | } | |
412 | ||
413 | /* | |
414 | * Remove data kernel modules in reverse load order. | |
415 | */ | |
416 | void modprobe_remove_lttng_data(void) | |
417 | { | |
418 | if (!probes) { | |
419 | return; | |
420 | } | |
421 | modprobe_remove_lttng(probes, nr_probes, LTTNG_MOD_OPTIONAL); | |
422 | free_probes(); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Remove all kernel modules in reverse order. | |
427 | */ | |
428 | void modprobe_remove_lttng_all(void) | |
429 | { | |
430 | modprobe_remove_lttng_data(); | |
431 | modprobe_remove_lttng_control(); | |
432 | } | |
433 | ||
e23b81ed JG |
434 | /* |
435 | * Load control kernel module(s). | |
436 | */ | |
437 | int modprobe_lttng_control(void) | |
438 | { | |
ab57d7d3 JG |
439 | int ret; |
440 | ||
441 | ret = modprobe_lttng(kern_modules_control_core, | |
442 | ARRAY_SIZE(kern_modules_control_core), | |
443 | LTTNG_MOD_REQUIRED); | |
ab57d7d3 | 444 | return ret; |
e23b81ed | 445 | } |
ab57d7d3 | 446 | |
c9d42407 PP |
447 | /** |
448 | * Grow global list of probes (double capacity or set it to 1 if | |
449 | * currently 0 and copy existing data). | |
096102bd | 450 | */ |
c9d42407 | 451 | static int grow_probes(void) |
096102bd | 452 | { |
c9d42407 PP |
453 | int i; |
454 | struct kern_modules_param *tmp_probes; | |
fbb9748b | 455 | |
c9d42407 PP |
456 | /* Initialize capacity to 1 if 0. */ |
457 | if (probes_capacity == 0) { | |
458 | probes = zmalloc(sizeof(*probes)); | |
459 | if (!probes) { | |
460 | PERROR("malloc probe list"); | |
461 | return -ENOMEM; | |
462 | } | |
463 | ||
464 | probes_capacity = 1; | |
465 | return 0; | |
fbb9748b JG |
466 | } |
467 | ||
c9d42407 PP |
468 | /* Double size. */ |
469 | probes_capacity *= 2; | |
470 | ||
471 | tmp_probes = zmalloc(sizeof(*tmp_probes) * probes_capacity); | |
472 | if (!tmp_probes) { | |
fbb9748b JG |
473 | PERROR("malloc probe list"); |
474 | return -ENOMEM; | |
475 | } | |
476 | ||
c9d42407 PP |
477 | for (i = 0; i < nr_probes; ++i) { |
478 | /* Move name pointer. */ | |
479 | tmp_probes[i].name = probes[i].name; | |
480 | } | |
481 | ||
482 | /* Replace probes with larger copy. */ | |
483 | free(probes); | |
484 | probes = tmp_probes; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Appends a comma-separated list of probes to the global list | |
491 | * of probes. | |
492 | */ | |
493 | static int append_list_to_probes(const char *list) | |
494 | { | |
495 | char *next; | |
d3c04b7c | 496 | int ret; |
44603c80 | 497 | char *tmp_list, *cur_list; |
c9d42407 PP |
498 | |
499 | assert(list); | |
500 | ||
44603c80 | 501 | cur_list = tmp_list = strdup(list); |
c9d42407 PP |
502 | if (!tmp_list) { |
503 | PERROR("strdup temp list"); | |
504 | return -ENOMEM; | |
505 | } | |
506 | ||
507 | for (;;) { | |
fbb9748b | 508 | size_t name_len; |
c9d42407 | 509 | struct kern_modules_param *cur_mod; |
fbb9748b | 510 | |
44603c80 | 511 | next = strtok(cur_list, ","); |
fbb9748b | 512 | if (!next) { |
c9d42407 | 513 | break; |
fbb9748b | 514 | } |
44603c80 | 515 | cur_list = NULL; |
fbb9748b JG |
516 | |
517 | /* filter leading spaces */ | |
518 | while (*next == ' ') { | |
519 | next++; | |
520 | } | |
521 | ||
c9d42407 PP |
522 | if (probes_capacity <= nr_probes) { |
523 | ret = grow_probes(); | |
524 | if (ret) { | |
398d5459 | 525 | goto error; |
c9d42407 PP |
526 | } |
527 | } | |
528 | ||
fbb9748b JG |
529 | /* Length 13 is "lttng-probe-" + \0 */ |
530 | name_len = strlen(next) + 13; | |
531 | ||
d3c04b7c | 532 | cur_mod = &probes[nr_probes]; |
c9d42407 PP |
533 | cur_mod->name = zmalloc(name_len); |
534 | if (!cur_mod->name) { | |
fbb9748b | 535 | PERROR("malloc probe list"); |
398d5459 MD |
536 | ret = -ENOMEM; |
537 | goto error; | |
fbb9748b JG |
538 | } |
539 | ||
c9d42407 | 540 | ret = snprintf(cur_mod->name, name_len, "lttng-probe-%s", next); |
fbb9748b JG |
541 | if (ret < 0) { |
542 | PERROR("snprintf modprobe name"); | |
398d5459 MD |
543 | ret = -ENOMEM; |
544 | goto error; | |
fbb9748b | 545 | } |
c9d42407 | 546 | |
c9d42407 | 547 | nr_probes++; |
fbb9748b JG |
548 | } |
549 | ||
c9d42407 | 550 | free(tmp_list); |
c9d42407 | 551 | return 0; |
398d5459 MD |
552 | |
553 | error: | |
554 | free(tmp_list); | |
555 | free_probes(); | |
556 | return ret; | |
c9d42407 PP |
557 | } |
558 | ||
559 | /* | |
560 | * Load data kernel module(s). | |
561 | */ | |
562 | int modprobe_lttng_data(void) | |
563 | { | |
564 | int ret, i; | |
565 | char *list; | |
566 | ||
567 | /* | |
568 | * Base probes: either from command line option, environment | |
569 | * variable or default list. | |
570 | */ | |
571 | if (kmod_probes_list) { | |
572 | list = kmod_probes_list; | |
573 | } else { | |
574 | list = utils_get_kmod_probes_list(); | |
575 | } | |
576 | ||
577 | if (list) { | |
578 | /* User-specified probes. */ | |
579 | ret = append_list_to_probes(list); | |
c9d42407 PP |
580 | if (ret) { |
581 | return ret; | |
582 | } | |
583 | } else { | |
584 | /* Default probes. */ | |
585 | int def_len = ARRAY_SIZE(kern_modules_probes_default); | |
c9d42407 | 586 | |
62e0422e | 587 | probes = zmalloc(sizeof(*probes) * def_len); |
c9d42407 PP |
588 | if (!probes) { |
589 | PERROR("malloc probe list"); | |
590 | return -ENOMEM; | |
591 | } | |
592 | ||
593 | nr_probes = probes_capacity = def_len; | |
594 | ||
595 | for (i = 0; i < def_len; ++i) { | |
596 | char* name = strdup(kern_modules_probes_default[i].name); | |
597 | ||
598 | if (!name) { | |
599 | PERROR("strdup probe item"); | |
398d5459 MD |
600 | ret = -ENOMEM; |
601 | goto error; | |
c9d42407 PP |
602 | } |
603 | ||
604 | probes[i].name = name; | |
605 | } | |
606 | } | |
607 | ||
608 | /* | |
609 | * Extra modules? Append them to current probes list. | |
610 | */ | |
611 | if (kmod_extra_probes_list) { | |
612 | list = kmod_extra_probes_list; | |
613 | } else { | |
614 | list = utils_get_extra_kmod_probes_list(); | |
615 | } | |
616 | ||
617 | if (list) { | |
618 | ret = append_list_to_probes(list); | |
619 | if (ret) { | |
398d5459 | 620 | goto error; |
c9d42407 PP |
621 | } |
622 | } | |
623 | ||
624 | /* | |
625 | * Load probes modules now. | |
626 | */ | |
398d5459 MD |
627 | ret = modprobe_lttng(probes, nr_probes, LTTNG_MOD_OPTIONAL); |
628 | if (ret) { | |
629 | goto error; | |
630 | } | |
631 | return ret; | |
632 | ||
633 | error: | |
634 | free_probes(); | |
635 | return ret; | |
096102bd | 636 | } |