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Commit | Line | Data |
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ecd40ee4 | 1 | /* |
586fc304 LDM |
2 | * libkmod - interface to kernel module operations |
3 | * | |
4 | * Copyright (C) 2011 ProFUSION embedded systems | |
586fc304 LDM |
5 | * |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
cb451f35 LDM |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. | |
586fc304 LDM |
10 | * |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
ecd40ee4 LDM |
20 | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <stddef.h> | |
24 | #include <stdarg.h> | |
1eb2ef69 | 25 | #include <limits.h> |
ecd40ee4 LDM |
26 | #include <unistd.h> |
27 | #include <errno.h> | |
7f3eb0cc | 28 | #include <fnmatch.h> |
ecd40ee4 LDM |
29 | #include <string.h> |
30 | #include <ctype.h> | |
221631d5 | 31 | #include <sys/utsname.h> |
ecd40ee4 | 32 | |
586fc304 LDM |
33 | #include "libkmod.h" |
34 | #include "libkmod-private.h" | |
9ba6f57b | 35 | #include "libkmod-index.h" |
ecd40ee4 | 36 | |
fd186ae9 LDM |
37 | #define KMOD_HASH_SIZE (256) |
38 | #define KMOD_LRU_MAX (128) | |
39 | ||
ecd40ee4 | 40 | /** |
586fc304 LDM |
41 | * SECTION:libkmod |
42 | * @short_description: libkmod context | |
ecd40ee4 LDM |
43 | * |
44 | * The context contains the default values for the library user, | |
45 | * and is passed to all library operations. | |
46 | */ | |
47 | ||
a4a75029 LDM |
48 | enum kmod_index { |
49 | KMOD_INDEX_DEP = 0, | |
50 | KMOD_INDEX_ALIAS, | |
51 | KMOD_INDEX_SYMBOL, | |
52 | _KMOD_INDEX_LAST, | |
53 | }; | |
54 | ||
55 | static const char* index_files[] = { | |
56 | [KMOD_INDEX_DEP] = "modules.dep", | |
57 | [KMOD_INDEX_ALIAS] = "modules.alias", | |
58 | [KMOD_INDEX_SYMBOL] = "modules.symbols", | |
59 | }; | |
60 | ||
cb8d4d3e GSB |
61 | static const char *default_config_paths[] = { |
62 | "/run/modprobe.d", | |
a308abec KS |
63 | SYSCONFDIR "/modprobe.d", |
64 | ROOTPREFIX "/lib/modprobe.d", | |
cb8d4d3e GSB |
65 | NULL |
66 | }; | |
67 | ||
ecd40ee4 | 68 | /** |
586fc304 | 69 | * kmod_ctx: |
ecd40ee4 LDM |
70 | * |
71 | * Opaque object representing the library context. | |
72 | */ | |
586fc304 | 73 | struct kmod_ctx { |
ecd40ee4 | 74 | int refcount; |
8d3f3ef8 | 75 | int log_priority; |
1bdd951e | 76 | void (*log_fn)(void *data, |
e4351b05 LDM |
77 | int priority, const char *file, int line, |
78 | const char *fn, const char *format, va_list args); | |
1bdd951e | 79 | void *log_data; |
1ce08a56 GSB |
80 | const void *userdata; |
81 | char *dirname; | |
d13e606f | 82 | struct kmod_config *config; |
822913d7 | 83 | struct hash *modules_by_name; |
33bb69b9 | 84 | struct index_mm *indexes[_KMOD_INDEX_LAST]; |
ecd40ee4 LDM |
85 | }; |
86 | ||
1bdd951e | 87 | void kmod_log(const struct kmod_ctx *ctx, |
e4351b05 LDM |
88 | int priority, const char *file, int line, const char *fn, |
89 | const char *format, ...) | |
ecd40ee4 LDM |
90 | { |
91 | va_list args; | |
92 | ||
e5c60f1c GSB |
93 | if (ctx->log_fn == NULL) |
94 | return; | |
95 | ||
ecd40ee4 | 96 | va_start(args, format); |
1bdd951e | 97 | ctx->log_fn(ctx->log_data, priority, file, line, fn, format, args); |
ecd40ee4 LDM |
98 | va_end(args); |
99 | } | |
100 | ||
1bdd951e | 101 | static void log_filep(void *data, |
e4351b05 LDM |
102 | int priority, const char *file, int line, |
103 | const char *fn, const char *format, va_list args) | |
ecd40ee4 | 104 | { |
1bdd951e GSB |
105 | FILE *fp = data; |
106 | fprintf(fp, "libkmod: %s: ", fn); | |
107 | vfprintf(fp, format, args); | |
ecd40ee4 LDM |
108 | } |
109 | ||
1ce08a56 | 110 | const char *kmod_get_dirname(const struct kmod_ctx *ctx) |
221631d5 LDM |
111 | { |
112 | return ctx->dirname; | |
113 | } | |
114 | ||
ecd40ee4 | 115 | /** |
586fc304 LDM |
116 | * kmod_get_userdata: |
117 | * @ctx: kmod library context | |
ecd40ee4 LDM |
118 | * |
119 | * Retrieve stored data pointer from library context. This might be useful | |
be5a6dea | 120 | * to access from callbacks. |
ecd40ee4 LDM |
121 | * |
122 | * Returns: stored userdata | |
54ba8b34 | 123 | */ |
6d177553 | 124 | KMOD_EXPORT void *kmod_get_userdata(const struct kmod_ctx *ctx) |
ecd40ee4 LDM |
125 | { |
126 | if (ctx == NULL) | |
127 | return NULL; | |
1ce08a56 | 128 | return (void *)ctx->userdata; |
ecd40ee4 LDM |
129 | } |
130 | ||
131 | /** | |
586fc304 LDM |
132 | * kmod_set_userdata: |
133 | * @ctx: kmod library context | |
ecd40ee4 LDM |
134 | * @userdata: data pointer |
135 | * | |
136 | * Store custom @userdata in the library context. | |
54ba8b34 | 137 | */ |
1ce08a56 | 138 | KMOD_EXPORT void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata) |
ecd40ee4 LDM |
139 | { |
140 | if (ctx == NULL) | |
141 | return; | |
142 | ctx->userdata = userdata; | |
143 | } | |
144 | ||
145 | static int log_priority(const char *priority) | |
146 | { | |
147 | char *endptr; | |
148 | int prio; | |
149 | ||
150 | prio = strtol(priority, &endptr, 10); | |
151 | if (endptr[0] == '\0' || isspace(endptr[0])) | |
152 | return prio; | |
153 | if (strncmp(priority, "err", 3) == 0) | |
154 | return LOG_ERR; | |
155 | if (strncmp(priority, "info", 4) == 0) | |
156 | return LOG_INFO; | |
157 | if (strncmp(priority, "debug", 5) == 0) | |
158 | return LOG_DEBUG; | |
159 | return 0; | |
160 | } | |
161 | ||
a308abec | 162 | static const char *dirname_default_prefix = ROOTPREFIX "/lib/modules"; |
904c63aa | 163 | |
1ce08a56 | 164 | static char *get_kernel_release(const char *dirname) |
221631d5 LDM |
165 | { |
166 | struct utsname u; | |
904c63aa LDM |
167 | char *p; |
168 | ||
169 | if (dirname != NULL) | |
170 | return strdup(dirname); | |
221631d5 LDM |
171 | |
172 | if (uname(&u) < 0) | |
173 | return NULL; | |
174 | ||
904c63aa LDM |
175 | if (asprintf(&p, "%s/%s", dirname_default_prefix, u.release) < 0) |
176 | return NULL; | |
177 | ||
178 | return p; | |
221631d5 LDM |
179 | } |
180 | ||
ecd40ee4 | 181 | /** |
586fc304 | 182 | * kmod_new: |
ecd40ee4 | 183 | * |
586fc304 | 184 | * Create kmod library context. This reads the kmod configuration |
ecd40ee4 LDM |
185 | * and fills in the default values. |
186 | * | |
187 | * The initial refcount is 1, and needs to be decremented to | |
586fc304 | 188 | * release the resources of the kmod library context. |
ecd40ee4 | 189 | * |
cb8d4d3e | 190 | * @dirname: what to consider as linux module's directory, if NULL |
a308abec | 191 | * defaults to $rootprefix/lib/modules/`uname -r`. |
cb8d4d3e | 192 | * @config_paths: ordered array of paths (directories or files) where |
be5a6dea LDM |
193 | * to load from user-defined configuration parameters such as |
194 | * alias, blacklists, commands (install, remove). If | |
195 | * NULL defaults to /run/modprobe.d, /etc/modprobe.d and | |
a308abec | 196 | * $rootprefix/lib/modprobe.d. Give an empty vector if configuration should |
be5a6dea | 197 | * not be read. This array must be null terminated. |
cb8d4d3e | 198 | * |
586fc304 | 199 | * Returns: a new kmod library context |
54ba8b34 | 200 | */ |
c35347f1 LDM |
201 | KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname, |
202 | const char * const *config_paths) | |
ecd40ee4 LDM |
203 | { |
204 | const char *env; | |
52a7704f | 205 | struct kmod_ctx *ctx; |
d13e606f | 206 | int err; |
ecd40ee4 | 207 | |
52a7704f LDM |
208 | ctx = calloc(1, sizeof(struct kmod_ctx)); |
209 | if (!ctx) | |
210 | return NULL; | |
ecd40ee4 | 211 | |
52a7704f | 212 | ctx->refcount = 1; |
1bdd951e GSB |
213 | ctx->log_fn = log_filep; |
214 | ctx->log_data = stderr; | |
52a7704f | 215 | ctx->log_priority = LOG_ERR; |
ecd40ee4 | 216 | |
904c63aa | 217 | ctx->dirname = get_kernel_release(dirname); |
221631d5 | 218 | |
ecd40ee4 | 219 | /* environment overwrites config */ |
586fc304 | 220 | env = getenv("KMOD_LOG"); |
ecd40ee4 | 221 | if (env != NULL) |
52a7704f | 222 | kmod_set_log_priority(ctx, log_priority(env)); |
ecd40ee4 | 223 | |
cb8d4d3e GSB |
224 | if (config_paths == NULL) |
225 | config_paths = default_config_paths; | |
226 | err = kmod_config_new(ctx, &ctx->config, config_paths); | |
d13e606f | 227 | if (err < 0) { |
fd186ae9 LDM |
228 | ERR(ctx, "could not create config\n"); |
229 | goto fail; | |
230 | } | |
231 | ||
822913d7 | 232 | ctx->modules_by_name = hash_new(KMOD_HASH_SIZE, NULL); |
fd186ae9 LDM |
233 | if (ctx->modules_by_name == NULL) { |
234 | ERR(ctx, "could not create by-name hash\n"); | |
235 | goto fail; | |
d13e606f | 236 | } |
7c2ab358 | 237 | |
ae6df84a LDM |
238 | INFO(ctx, "ctx %p created\n", ctx); |
239 | DBG(ctx, "log_priority=%d\n", ctx->log_priority); | |
52a7704f LDM |
240 | |
241 | return ctx; | |
fd186ae9 LDM |
242 | |
243 | fail: | |
244 | free(ctx->modules_by_name); | |
245 | free(ctx->dirname); | |
246 | free(ctx); | |
247 | return NULL; | |
ecd40ee4 LDM |
248 | } |
249 | ||
250 | /** | |
586fc304 LDM |
251 | * kmod_ref: |
252 | * @ctx: kmod library context | |
ecd40ee4 | 253 | * |
586fc304 | 254 | * Take a reference of the kmod library context. |
ecd40ee4 | 255 | * |
586fc304 | 256 | * Returns: the passed kmod library context |
54ba8b34 | 257 | */ |
586fc304 | 258 | KMOD_EXPORT struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx) |
ecd40ee4 LDM |
259 | { |
260 | if (ctx == NULL) | |
261 | return NULL; | |
262 | ctx->refcount++; | |
263 | return ctx; | |
264 | } | |
265 | ||
266 | /** | |
586fc304 LDM |
267 | * kmod_unref: |
268 | * @ctx: kmod library context | |
ecd40ee4 | 269 | * |
586fc304 | 270 | * Drop a reference of the kmod library context. If the refcount |
ecd40ee4 | 271 | * reaches zero, the resources of the context will be released. |
54ba8b34 | 272 | */ |
586fc304 | 273 | KMOD_EXPORT struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx) |
ecd40ee4 LDM |
274 | { |
275 | if (ctx == NULL) | |
276 | return NULL; | |
4d1e689a LDM |
277 | |
278 | if (--ctx->refcount > 0) | |
ecd40ee4 | 279 | return ctx; |
33bb69b9 | 280 | |
ae6df84a | 281 | INFO(ctx, "context %p released\n", ctx); |
33bb69b9 LDM |
282 | |
283 | kmod_unload_resources(ctx); | |
822913d7 | 284 | hash_free(ctx->modules_by_name); |
1ce08a56 | 285 | free(ctx->dirname); |
d13e606f GSB |
286 | if (ctx->config) |
287 | kmod_config_free(ctx->config); | |
33bb69b9 | 288 | |
ecd40ee4 LDM |
289 | free(ctx); |
290 | return NULL; | |
291 | } | |
292 | ||
293 | /** | |
586fc304 LDM |
294 | * kmod_set_log_fn: |
295 | * @ctx: kmod library context | |
ecd40ee4 LDM |
296 | * @log_fn: function to be called for logging messages |
297 | * | |
298 | * The built-in logging writes to stderr. It can be | |
299 | * overridden by a custom function, to plug log messages | |
300 | * into the user's logging functionality. | |
54ba8b34 | 301 | */ |
586fc304 | 302 | KMOD_EXPORT void kmod_set_log_fn(struct kmod_ctx *ctx, |
1bdd951e | 303 | void (*log_fn)(void *data, |
e4351b05 LDM |
304 | int priority, const char *file, |
305 | int line, const char *fn, | |
1bdd951e GSB |
306 | const char *format, va_list args), |
307 | const void *data) | |
ecd40ee4 | 308 | { |
e5c60f1c GSB |
309 | if (ctx == NULL) |
310 | return; | |
ecd40ee4 | 311 | ctx->log_fn = log_fn; |
1bdd951e | 312 | ctx->log_data = (void *)data; |
ae6df84a | 313 | INFO(ctx, "custom logging function %p registered\n", log_fn); |
ecd40ee4 LDM |
314 | } |
315 | ||
316 | /** | |
586fc304 LDM |
317 | * kmod_get_log_priority: |
318 | * @ctx: kmod library context | |
ecd40ee4 LDM |
319 | * |
320 | * Returns: the current logging priority | |
54ba8b34 | 321 | */ |
6d177553 | 322 | KMOD_EXPORT int kmod_get_log_priority(const struct kmod_ctx *ctx) |
ecd40ee4 | 323 | { |
e5c60f1c GSB |
324 | if (ctx == NULL) |
325 | return -1; | |
ecd40ee4 LDM |
326 | return ctx->log_priority; |
327 | } | |
328 | ||
329 | /** | |
586fc304 LDM |
330 | * kmod_set_log_priority: |
331 | * @ctx: kmod library context | |
ecd40ee4 LDM |
332 | * @priority: the new logging priority |
333 | * | |
334 | * Set the current logging priority. The value controls which messages | |
335 | * are logged. | |
54ba8b34 | 336 | */ |
586fc304 | 337 | KMOD_EXPORT void kmod_set_log_priority(struct kmod_ctx *ctx, int priority) |
ecd40ee4 | 338 | { |
e5c60f1c GSB |
339 | if (ctx == NULL) |
340 | return; | |
ecd40ee4 LDM |
341 | ctx->log_priority = priority; |
342 | } | |
7f3eb0cc | 343 | |
fd186ae9 | 344 | struct kmod_module *kmod_pool_get_module(struct kmod_ctx *ctx, |
8bdeca11 | 345 | const char *key) |
fd186ae9 LDM |
346 | { |
347 | struct kmod_module *mod; | |
348 | ||
822913d7 | 349 | mod = hash_find(ctx->modules_by_name, key); |
fd186ae9 | 350 | |
8bdeca11 | 351 | DBG(ctx, "get module name='%s' found=%p\n", key, mod); |
fd186ae9 LDM |
352 | |
353 | return mod; | |
354 | } | |
355 | ||
8bdeca11 LDM |
356 | void kmod_pool_add_module(struct kmod_ctx *ctx, struct kmod_module *mod, |
357 | const char *key) | |
fd186ae9 | 358 | { |
8bdeca11 | 359 | DBG(ctx, "add %p key='%s'\n", mod, key); |
fd186ae9 | 360 | |
822913d7 | 361 | hash_add(ctx->modules_by_name, key, mod); |
fd186ae9 LDM |
362 | } |
363 | ||
8bdeca11 LDM |
364 | void kmod_pool_del_module(struct kmod_ctx *ctx, struct kmod_module *mod, |
365 | const char *key) | |
fd186ae9 | 366 | { |
8bdeca11 | 367 | DBG(ctx, "del %p key='%s'\n", mod, key); |
fd186ae9 | 368 | |
822913d7 | 369 | hash_del(ctx->modules_by_name, key); |
fd186ae9 | 370 | } |
9ba6f57b | 371 | |
a009482c | 372 | static int kmod_lookup_alias_from_alias_bin(struct kmod_ctx *ctx, |
810803db | 373 | enum kmod_index index_number, |
7b30f4f4 | 374 | const char *name, |
9ba6f57b LDM |
375 | struct kmod_list **list) |
376 | { | |
6f1bc6e3 | 377 | int err, nmatch = 0; |
0fbdfef3 | 378 | struct index_file *idx; |
9ba6f57b LDM |
379 | struct index_value *realnames, *realname; |
380 | ||
65a84f55 | 381 | if (ctx->indexes[index_number] != NULL) { |
3e245be1 GSB |
382 | DBG(ctx, "use mmaped index '%s' for name=%s\n", |
383 | index_files[index_number], name); | |
65a84f55 LDM |
384 | realnames = index_mm_searchwild(ctx->indexes[index_number], |
385 | name); | |
386 | } else{ | |
387 | char fn[PATH_MAX]; | |
388 | ||
3b209959 | 389 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
810803db | 390 | index_files[index_number]); |
9ba6f57b | 391 | |
65a84f55 | 392 | DBG(ctx, "file=%s name=%s\n", fn, name); |
9ba6f57b | 393 | |
65a84f55 LDM |
394 | idx = index_file_open(fn); |
395 | if (idx == NULL) | |
396 | return -ENOSYS; | |
9ba6f57b | 397 | |
65a84f55 LDM |
398 | realnames = index_searchwild(idx, name); |
399 | index_file_close(idx); | |
400 | } | |
4272d087 | 401 | |
a955f71f | 402 | for (realname = realnames; realname; realname = realname->next) { |
9ba6f57b LDM |
403 | struct kmod_module *mod; |
404 | ||
ee3b3ff2 | 405 | err = kmod_module_new_from_alias(ctx, name, realname->value, &mod); |
9ba6f57b LDM |
406 | if (err < 0) { |
407 | ERR(ctx, "%s\n", strerror(-err)); | |
23fc91c6 | 408 | goto fail; |
9ba6f57b LDM |
409 | } |
410 | ||
411 | *list = kmod_list_append(*list, mod); | |
23fc91c6 | 412 | nmatch++; |
9ba6f57b LDM |
413 | } |
414 | ||
9ba6f57b | 415 | index_values_free(realnames); |
23fc91c6 LDM |
416 | return nmatch; |
417 | ||
418 | fail: | |
419 | *list = kmod_list_remove_n_latest(*list, nmatch); | |
9ba6f57b | 420 | return err; |
7b30f4f4 LDM |
421 | |
422 | } | |
423 | ||
7b30f4f4 LDM |
424 | int kmod_lookup_alias_from_symbols_file(struct kmod_ctx *ctx, const char *name, |
425 | struct kmod_list **list) | |
426 | { | |
0c010fae | 427 | if (!strstartswith(name, "symbol:")) |
7b30f4f4 LDM |
428 | return 0; |
429 | ||
810803db LDM |
430 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_SYMBOL, name, |
431 | list); | |
9ba6f57b LDM |
432 | } |
433 | ||
49e61ca3 LDM |
434 | int kmod_lookup_alias_from_aliases_file(struct kmod_ctx *ctx, const char *name, |
435 | struct kmod_list **list) | |
436 | { | |
810803db LDM |
437 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_ALIAS, name, |
438 | list); | |
49e61ca3 LDM |
439 | } |
440 | ||
671d4894 | 441 | char *kmod_search_moddep(struct kmod_ctx *ctx, const char *name) |
1eb2ef69 LDM |
442 | { |
443 | struct index_file *idx; | |
444 | char fn[PATH_MAX]; | |
445 | char *line; | |
446 | ||
85132101 GSB |
447 | if (ctx->indexes[KMOD_INDEX_DEP]) { |
448 | DBG(ctx, "use mmaped index '%s' modname=%s\n", | |
449 | index_files[KMOD_INDEX_DEP], name); | |
450 | return index_mm_search(ctx->indexes[KMOD_INDEX_DEP], name); | |
451 | } | |
452 | ||
a4a75029 LDM |
453 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
454 | index_files[KMOD_INDEX_DEP]); | |
1eb2ef69 LDM |
455 | |
456 | DBG(ctx, "file=%s modname=%s\n", fn, name); | |
457 | ||
458 | idx = index_file_open(fn); | |
459 | if (idx == NULL) { | |
d01c67e3 | 460 | ERR(ctx, "Could not open moddep file '%s'\n", fn); |
1eb2ef69 LDM |
461 | return NULL; |
462 | } | |
463 | ||
464 | line = index_search(idx, name); | |
465 | index_file_close(idx); | |
466 | ||
467 | return line; | |
468 | } | |
469 | ||
64700e47 LDM |
470 | int kmod_lookup_alias_from_moddep_file(struct kmod_ctx *ctx, const char *name, |
471 | struct kmod_list **list) | |
472 | { | |
1eb2ef69 | 473 | char *line; |
64700e47 LDM |
474 | int n = 0; |
475 | ||
476 | /* | |
477 | * Module names do not contain ':'. Return early if we know it will | |
478 | * not be found. | |
479 | */ | |
480 | if (strchr(name, ':')) | |
481 | return 0; | |
482 | ||
671d4894 | 483 | line = kmod_search_moddep(ctx, name); |
64700e47 LDM |
484 | if (line != NULL) { |
485 | struct kmod_module *mod; | |
486 | ||
487 | n = kmod_module_new_from_name(ctx, name, &mod); | |
488 | if (n < 0) { | |
489 | ERR(ctx, "%s\n", strerror(-n)); | |
490 | goto finish; | |
491 | } | |
492 | ||
493 | *list = kmod_list_append(*list, mod); | |
671d4894 | 494 | kmod_module_parse_depline(mod, line); |
64700e47 LDM |
495 | } |
496 | ||
497 | finish: | |
498 | free(line); | |
64700e47 LDM |
499 | |
500 | return n; | |
501 | } | |
502 | ||
7f3eb0cc LDM |
503 | int kmod_lookup_alias_from_config(struct kmod_ctx *ctx, const char *name, |
504 | struct kmod_list **list) | |
505 | { | |
d13e606f | 506 | struct kmod_config *config = ctx->config; |
7f3eb0cc | 507 | struct kmod_list *l; |
23fc91c6 | 508 | int err, nmatch = 0; |
7f3eb0cc LDM |
509 | |
510 | kmod_list_foreach(l, config->aliases) { | |
511 | const char *aliasname = kmod_alias_get_name(l); | |
512 | const char *modname = kmod_alias_get_modname(l); | |
513 | ||
514 | if (fnmatch(aliasname, name, 0) == 0) { | |
515 | struct kmod_module *mod; | |
516 | ||
ee3b3ff2 LDM |
517 | err = kmod_module_new_from_alias(ctx, aliasname, |
518 | modname, &mod); | |
7f3eb0cc | 519 | if (err < 0) { |
d01c67e3 | 520 | ERR(ctx, "%s\n", strerror(-err)); |
23fc91c6 | 521 | goto fail; |
7f3eb0cc LDM |
522 | } |
523 | ||
524 | *list = kmod_list_append(*list, mod); | |
23fc91c6 | 525 | nmatch++; |
7f3eb0cc LDM |
526 | } |
527 | } | |
528 | ||
23fc91c6 LDM |
529 | return nmatch; |
530 | ||
531 | fail: | |
532 | *list = kmod_list_remove_n_latest(*list, nmatch); | |
533 | return err; | |
7f3eb0cc | 534 | } |
1487a64f | 535 | |
f4fc5523 LDM |
536 | int kmod_lookup_alias_from_commands(struct kmod_ctx *ctx, const char *name, |
537 | struct kmod_list **list) | |
538 | { | |
539 | struct kmod_config *config = ctx->config; | |
540 | struct kmod_list *l, *node; | |
541 | int err, nmatch = 0; | |
542 | ||
543 | kmod_list_foreach(l, config->install_commands) { | |
544 | const char *modname = kmod_command_get_modname(l); | |
545 | ||
546 | if (streq(modname, name)) { | |
547 | const char *cmd = kmod_command_get_command(l); | |
548 | struct kmod_module *mod; | |
549 | ||
550 | err = kmod_module_new_from_name(ctx, modname, &mod); | |
551 | if (err < 0) { | |
552 | ERR(ctx, "%s\n", strerror(-err)); | |
553 | return err; | |
554 | } | |
555 | ||
556 | node = kmod_list_append(*list, mod); | |
557 | if (node == NULL) { | |
558 | ERR(ctx, "out of memory\n"); | |
559 | return -ENOMEM; | |
560 | } | |
561 | ||
562 | *list = node; | |
563 | nmatch = 1; | |
564 | ||
565 | kmod_module_set_install_commands(mod, cmd); | |
566 | ||
567 | /* | |
568 | * match only the first one, like modprobe from | |
569 | * module-init-tools does | |
570 | */ | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
575 | if (nmatch) | |
576 | return nmatch; | |
577 | ||
578 | kmod_list_foreach(l, config->remove_commands) { | |
579 | const char *modname = kmod_command_get_modname(l); | |
580 | ||
581 | if (streq(modname, name)) { | |
582 | const char *cmd = kmod_command_get_command(l); | |
583 | struct kmod_module *mod; | |
584 | ||
585 | err = kmod_module_new_from_name(ctx, modname, &mod); | |
586 | if (err < 0) { | |
587 | ERR(ctx, "%s\n", strerror(-err)); | |
588 | return err; | |
589 | } | |
590 | ||
591 | node = kmod_list_append(*list, mod); | |
592 | if (node == NULL) { | |
593 | ERR(ctx, "out of memory\n"); | |
594 | return -ENOMEM; | |
595 | } | |
596 | ||
597 | *list = node; | |
598 | nmatch = 1; | |
599 | ||
600 | kmod_module_set_remove_commands(mod, cmd); | |
601 | ||
602 | /* | |
603 | * match only the first one, like modprobe from | |
604 | * module-init-tools does | |
605 | */ | |
606 | break; | |
607 | } | |
608 | } | |
609 | ||
610 | return nmatch; | |
611 | } | |
612 | ||
be5a6dea LDM |
613 | /** |
614 | * kmod_load_resources: | |
615 | * @ctx: kmod library context | |
616 | * | |
617 | * Load indexes and keep them open in @ctx. This way it's faster to lookup | |
618 | * information within the indexes. If this function is not called before a | |
619 | * search, the necessary index is always opened and closed. | |
620 | * | |
621 | * If user will do more than one or two lookups, insertions, deletions, most | |
622 | * likely it's good to call this function first. Particularly in a daemon like | |
623 | * udev that on bootup issues hundreds of calls to lookup the index, calling | |
624 | * this function will speedup the searches. | |
625 | * | |
626 | * Returns: 0 on success or < 0 otherwise. | |
627 | */ | |
33bb69b9 LDM |
628 | KMOD_EXPORT int kmod_load_resources(struct kmod_ctx *ctx) |
629 | { | |
630 | size_t i; | |
631 | ||
632 | if (ctx == NULL) | |
633 | return -ENOENT; | |
634 | ||
2f76fda2 | 635 | for (i = 0; i < _KMOD_INDEX_LAST; i++) { |
6de8f6e9 | 636 | char path[PATH_MAX]; |
3e676766 | 637 | |
16ca3666 | 638 | if (ctx->indexes[i] != NULL) { |
6de8f6e9 | 639 | INFO(ctx, "Index %s already loaded\n", index_files[i]); |
3e676766 LDM |
640 | continue; |
641 | } | |
79d57fcb | 642 | |
6de8f6e9 LDM |
643 | snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname, |
644 | index_files[i]); | |
645 | ctx->indexes[i] = index_mm_open(ctx, path, true); | |
3e676766 LDM |
646 | if (ctx->indexes[i] == NULL) |
647 | goto fail; | |
33bb69b9 LDM |
648 | } |
649 | ||
650 | return 0; | |
651 | ||
652 | fail: | |
653 | kmod_unload_resources(ctx); | |
654 | return -ENOMEM; | |
655 | } | |
656 | ||
be5a6dea LDM |
657 | /** |
658 | * kmod_unload_resources: | |
659 | * @ctx: kmod library context | |
660 | * | |
661 | * Unload all the indexes. This will free the resources to maintain the index | |
662 | * open and all subsequent searches will need to open and close the index. | |
663 | * | |
664 | * User is free to call kmod_load_resources() and kmod_unload_resources() as | |
665 | * many times as wanted during the lifecycle of @ctx. For example, if a daemon | |
666 | * knows that when starting up it will lookup a lot of modules, it could call | |
667 | * kmod_load_resources() and after the first burst of searches is gone, it | |
668 | * could free the resources by calling kmod_unload_resources(). | |
669 | * | |
670 | * Returns: 0 on success or < 0 otherwise. | |
671 | */ | |
33bb69b9 LDM |
672 | KMOD_EXPORT void kmod_unload_resources(struct kmod_ctx *ctx) |
673 | { | |
674 | size_t i; | |
675 | ||
676 | if (ctx == NULL) | |
677 | return; | |
678 | ||
2f76fda2 | 679 | for (i = 0; i < _KMOD_INDEX_LAST; i++) { |
33bb69b9 LDM |
680 | if (ctx->indexes[i] != NULL) { |
681 | index_mm_close(ctx->indexes[i]); | |
682 | ctx->indexes[i] = NULL; | |
683 | } | |
684 | } | |
685 | } | |
bd3f5535 | 686 | |
c1c9c446 LDM |
687 | const struct kmod_list *kmod_get_blacklists(const struct kmod_ctx *ctx) |
688 | { | |
689 | return ctx->config->blacklists; | |
690 | } | |
691 | ||
bd3f5535 GSB |
692 | const struct kmod_list *kmod_get_options(const struct kmod_ctx *ctx) |
693 | { | |
694 | return ctx->config->options; | |
695 | } | |
696 | ||
697 | const struct kmod_list *kmod_get_install_commands(const struct kmod_ctx *ctx) | |
698 | { | |
699 | return ctx->config->install_commands; | |
700 | } | |
701 | ||
702 | const struct kmod_list *kmod_get_remove_commands(const struct kmod_ctx *ctx) | |
703 | { | |
704 | return ctx->config->remove_commands; | |
705 | } | |
1c522600 GSB |
706 | |
707 | const struct kmod_list *kmod_get_softdeps(const struct kmod_ctx *ctx) | |
708 | { | |
709 | return ctx->config->softdeps; | |
710 | } |