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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", | |
63 | "/etc/modprobe.d", | |
64 | "/lib/modprobe.d", | |
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; |
fd186ae9 | 83 | struct kmod_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 | |
120 | * to access from callbacks like a custom logging function. | |
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 | ||
904c63aa LDM |
162 | static const char *dirname_default_prefix = "/lib/modules"; |
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 GSB |
190 | * @dirname: what to consider as linux module's directory, if NULL |
191 | * defaults to /lib/modules/`uname -r` | |
192 | * @config_paths: ordered array of paths (directories or files) where | |
193 | * to load user-defined configuration parameters such as | |
194 | * alias, blacklists, commands (install, remove). If | |
195 | * NULL defaults to /run/modprobe.d, /etc/modprobe.d and | |
196 | * /lib/modprobe.d. This array must be null terminated. | |
197 | * | |
586fc304 | 198 | * Returns: a new kmod library context |
54ba8b34 | 199 | */ |
c35347f1 LDM |
200 | KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname, |
201 | const char * const *config_paths) | |
ecd40ee4 LDM |
202 | { |
203 | const char *env; | |
52a7704f | 204 | struct kmod_ctx *ctx; |
d13e606f | 205 | int err; |
ecd40ee4 | 206 | |
52a7704f LDM |
207 | ctx = calloc(1, sizeof(struct kmod_ctx)); |
208 | if (!ctx) | |
209 | return NULL; | |
ecd40ee4 | 210 | |
52a7704f | 211 | ctx->refcount = 1; |
1bdd951e GSB |
212 | ctx->log_fn = log_filep; |
213 | ctx->log_data = stderr; | |
52a7704f | 214 | ctx->log_priority = LOG_ERR; |
ecd40ee4 | 215 | |
904c63aa | 216 | ctx->dirname = get_kernel_release(dirname); |
221631d5 | 217 | |
ecd40ee4 | 218 | /* environment overwrites config */ |
586fc304 | 219 | env = getenv("KMOD_LOG"); |
ecd40ee4 | 220 | if (env != NULL) |
52a7704f | 221 | kmod_set_log_priority(ctx, log_priority(env)); |
ecd40ee4 | 222 | |
cb8d4d3e GSB |
223 | if (config_paths == NULL) |
224 | config_paths = default_config_paths; | |
225 | err = kmod_config_new(ctx, &ctx->config, config_paths); | |
d13e606f | 226 | if (err < 0) { |
fd186ae9 LDM |
227 | ERR(ctx, "could not create config\n"); |
228 | goto fail; | |
229 | } | |
230 | ||
231 | ctx->modules_by_name = kmod_hash_new(KMOD_HASH_SIZE, NULL); | |
232 | if (ctx->modules_by_name == NULL) { | |
233 | ERR(ctx, "could not create by-name hash\n"); | |
234 | goto fail; | |
d13e606f | 235 | } |
7c2ab358 | 236 | |
ae6df84a LDM |
237 | INFO(ctx, "ctx %p created\n", ctx); |
238 | DBG(ctx, "log_priority=%d\n", ctx->log_priority); | |
52a7704f LDM |
239 | |
240 | return ctx; | |
fd186ae9 LDM |
241 | |
242 | fail: | |
243 | free(ctx->modules_by_name); | |
244 | free(ctx->dirname); | |
245 | free(ctx); | |
246 | return NULL; | |
ecd40ee4 LDM |
247 | } |
248 | ||
249 | /** | |
586fc304 LDM |
250 | * kmod_ref: |
251 | * @ctx: kmod library context | |
ecd40ee4 | 252 | * |
586fc304 | 253 | * Take a reference of the kmod library context. |
ecd40ee4 | 254 | * |
586fc304 | 255 | * Returns: the passed kmod library context |
54ba8b34 | 256 | */ |
586fc304 | 257 | KMOD_EXPORT struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx) |
ecd40ee4 LDM |
258 | { |
259 | if (ctx == NULL) | |
260 | return NULL; | |
261 | ctx->refcount++; | |
262 | return ctx; | |
263 | } | |
264 | ||
265 | /** | |
586fc304 LDM |
266 | * kmod_unref: |
267 | * @ctx: kmod library context | |
ecd40ee4 | 268 | * |
586fc304 | 269 | * Drop a reference of the kmod library context. If the refcount |
ecd40ee4 LDM |
270 | * reaches zero, the resources of the context will be released. |
271 | * | |
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); | |
fd186ae9 | 284 | kmod_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. | |
301 | * | |
54ba8b34 | 302 | */ |
586fc304 | 303 | KMOD_EXPORT void kmod_set_log_fn(struct kmod_ctx *ctx, |
1bdd951e | 304 | void (*log_fn)(void *data, |
e4351b05 LDM |
305 | int priority, const char *file, |
306 | int line, const char *fn, | |
1bdd951e GSB |
307 | const char *format, va_list args), |
308 | const void *data) | |
ecd40ee4 | 309 | { |
e5c60f1c GSB |
310 | if (ctx == NULL) |
311 | return; | |
ecd40ee4 | 312 | ctx->log_fn = log_fn; |
1bdd951e | 313 | ctx->log_data = (void *)data; |
ae6df84a | 314 | INFO(ctx, "custom logging function %p registered\n", log_fn); |
ecd40ee4 LDM |
315 | } |
316 | ||
317 | /** | |
586fc304 LDM |
318 | * kmod_get_log_priority: |
319 | * @ctx: kmod library context | |
ecd40ee4 LDM |
320 | * |
321 | * Returns: the current logging priority | |
54ba8b34 | 322 | */ |
6d177553 | 323 | KMOD_EXPORT int kmod_get_log_priority(const struct kmod_ctx *ctx) |
ecd40ee4 | 324 | { |
e5c60f1c GSB |
325 | if (ctx == NULL) |
326 | return -1; | |
ecd40ee4 LDM |
327 | return ctx->log_priority; |
328 | } | |
329 | ||
330 | /** | |
586fc304 LDM |
331 | * kmod_set_log_priority: |
332 | * @ctx: kmod library context | |
ecd40ee4 LDM |
333 | * @priority: the new logging priority |
334 | * | |
335 | * Set the current logging priority. The value controls which messages | |
336 | * are logged. | |
54ba8b34 | 337 | */ |
586fc304 | 338 | KMOD_EXPORT void kmod_set_log_priority(struct kmod_ctx *ctx, int priority) |
ecd40ee4 | 339 | { |
e5c60f1c GSB |
340 | if (ctx == NULL) |
341 | return; | |
ecd40ee4 LDM |
342 | ctx->log_priority = priority; |
343 | } | |
7f3eb0cc | 344 | |
fd186ae9 LDM |
345 | struct kmod_module *kmod_pool_get_module(struct kmod_ctx *ctx, |
346 | const char *name) | |
347 | { | |
348 | struct kmod_module *mod; | |
349 | ||
350 | mod = kmod_hash_find(ctx->modules_by_name, name); | |
351 | ||
352 | DBG(ctx, "get module name='%s' found=%p\n", name, mod); | |
353 | ||
354 | return mod; | |
355 | } | |
356 | ||
357 | void kmod_pool_add_module(struct kmod_ctx *ctx, struct kmod_module *mod) | |
358 | { | |
359 | const char *name = kmod_module_get_name(mod); | |
360 | ||
361 | DBG(ctx, "add %p name='%s'\n", mod, name); | |
362 | ||
363 | kmod_hash_add(ctx->modules_by_name, name, mod); | |
364 | } | |
365 | ||
366 | void kmod_pool_del_module(struct kmod_ctx *ctx, struct kmod_module *mod) | |
367 | { | |
368 | const char *name = kmod_module_get_name(mod); | |
369 | ||
370 | DBG(ctx, "del %p name='%s'\n", mod, name); | |
371 | ||
372 | kmod_hash_del(ctx->modules_by_name, name); | |
373 | } | |
9ba6f57b | 374 | |
a009482c | 375 | static int kmod_lookup_alias_from_alias_bin(struct kmod_ctx *ctx, |
810803db | 376 | enum kmod_index index_number, |
7b30f4f4 | 377 | const char *name, |
9ba6f57b LDM |
378 | struct kmod_list **list) |
379 | { | |
6f1bc6e3 | 380 | int err, nmatch = 0; |
0fbdfef3 | 381 | struct index_file *idx; |
9ba6f57b LDM |
382 | struct index_value *realnames, *realname; |
383 | ||
65a84f55 | 384 | if (ctx->indexes[index_number] != NULL) { |
3e245be1 GSB |
385 | DBG(ctx, "use mmaped index '%s' for name=%s\n", |
386 | index_files[index_number], name); | |
65a84f55 LDM |
387 | realnames = index_mm_searchwild(ctx->indexes[index_number], |
388 | name); | |
389 | } else{ | |
390 | char fn[PATH_MAX]; | |
391 | ||
3b209959 | 392 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
810803db | 393 | index_files[index_number]); |
9ba6f57b | 394 | |
65a84f55 | 395 | DBG(ctx, "file=%s name=%s\n", fn, name); |
9ba6f57b | 396 | |
65a84f55 LDM |
397 | idx = index_file_open(fn); |
398 | if (idx == NULL) | |
399 | return -ENOSYS; | |
9ba6f57b | 400 | |
65a84f55 LDM |
401 | realnames = index_searchwild(idx, name); |
402 | index_file_close(idx); | |
403 | } | |
4272d087 | 404 | |
9ba6f57b LDM |
405 | for (realname = realnames; realname; realname = realnames->next) { |
406 | struct kmod_module *mod; | |
407 | ||
ee3b3ff2 | 408 | err = kmod_module_new_from_alias(ctx, name, realname->value, &mod); |
9ba6f57b LDM |
409 | if (err < 0) { |
410 | ERR(ctx, "%s\n", strerror(-err)); | |
23fc91c6 | 411 | goto fail; |
9ba6f57b LDM |
412 | } |
413 | ||
414 | *list = kmod_list_append(*list, mod); | |
23fc91c6 | 415 | nmatch++; |
9ba6f57b LDM |
416 | } |
417 | ||
9ba6f57b | 418 | index_values_free(realnames); |
23fc91c6 LDM |
419 | return nmatch; |
420 | ||
421 | fail: | |
422 | *list = kmod_list_remove_n_latest(*list, nmatch); | |
9ba6f57b | 423 | return err; |
7b30f4f4 LDM |
424 | |
425 | } | |
426 | ||
7b30f4f4 LDM |
427 | int kmod_lookup_alias_from_symbols_file(struct kmod_ctx *ctx, const char *name, |
428 | struct kmod_list **list) | |
429 | { | |
430 | if (!startswith(name, "symbol:")) | |
431 | return 0; | |
432 | ||
810803db LDM |
433 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_SYMBOL, name, |
434 | list); | |
9ba6f57b LDM |
435 | } |
436 | ||
49e61ca3 LDM |
437 | int kmod_lookup_alias_from_aliases_file(struct kmod_ctx *ctx, const char *name, |
438 | struct kmod_list **list) | |
439 | { | |
810803db LDM |
440 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_ALIAS, name, |
441 | list); | |
49e61ca3 LDM |
442 | } |
443 | ||
671d4894 | 444 | char *kmod_search_moddep(struct kmod_ctx *ctx, const char *name) |
1eb2ef69 LDM |
445 | { |
446 | struct index_file *idx; | |
447 | char fn[PATH_MAX]; | |
448 | char *line; | |
449 | ||
85132101 GSB |
450 | if (ctx->indexes[KMOD_INDEX_DEP]) { |
451 | DBG(ctx, "use mmaped index '%s' modname=%s\n", | |
452 | index_files[KMOD_INDEX_DEP], name); | |
453 | return index_mm_search(ctx->indexes[KMOD_INDEX_DEP], name); | |
454 | } | |
455 | ||
a4a75029 LDM |
456 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
457 | index_files[KMOD_INDEX_DEP]); | |
1eb2ef69 LDM |
458 | |
459 | DBG(ctx, "file=%s modname=%s\n", fn, name); | |
460 | ||
461 | idx = index_file_open(fn); | |
462 | if (idx == NULL) { | |
d01c67e3 | 463 | ERR(ctx, "Could not open moddep file '%s'\n", fn); |
1eb2ef69 LDM |
464 | return NULL; |
465 | } | |
466 | ||
467 | line = index_search(idx, name); | |
468 | index_file_close(idx); | |
469 | ||
470 | return line; | |
471 | } | |
472 | ||
64700e47 LDM |
473 | int kmod_lookup_alias_from_moddep_file(struct kmod_ctx *ctx, const char *name, |
474 | struct kmod_list **list) | |
475 | { | |
1eb2ef69 | 476 | char *line; |
64700e47 LDM |
477 | int n = 0; |
478 | ||
479 | /* | |
480 | * Module names do not contain ':'. Return early if we know it will | |
481 | * not be found. | |
482 | */ | |
483 | if (strchr(name, ':')) | |
484 | return 0; | |
485 | ||
671d4894 | 486 | line = kmod_search_moddep(ctx, name); |
64700e47 LDM |
487 | if (line != NULL) { |
488 | struct kmod_module *mod; | |
489 | ||
490 | n = kmod_module_new_from_name(ctx, name, &mod); | |
491 | if (n < 0) { | |
492 | ERR(ctx, "%s\n", strerror(-n)); | |
493 | goto finish; | |
494 | } | |
495 | ||
496 | *list = kmod_list_append(*list, mod); | |
671d4894 | 497 | kmod_module_parse_depline(mod, line); |
64700e47 LDM |
498 | } |
499 | ||
500 | finish: | |
501 | free(line); | |
64700e47 LDM |
502 | |
503 | return n; | |
504 | } | |
505 | ||
7f3eb0cc LDM |
506 | int kmod_lookup_alias_from_config(struct kmod_ctx *ctx, const char *name, |
507 | struct kmod_list **list) | |
508 | { | |
d13e606f | 509 | struct kmod_config *config = ctx->config; |
7f3eb0cc | 510 | struct kmod_list *l; |
23fc91c6 | 511 | int err, nmatch = 0; |
7f3eb0cc LDM |
512 | |
513 | kmod_list_foreach(l, config->aliases) { | |
514 | const char *aliasname = kmod_alias_get_name(l); | |
515 | const char *modname = kmod_alias_get_modname(l); | |
516 | ||
517 | if (fnmatch(aliasname, name, 0) == 0) { | |
518 | struct kmod_module *mod; | |
519 | ||
ee3b3ff2 LDM |
520 | err = kmod_module_new_from_alias(ctx, aliasname, |
521 | modname, &mod); | |
7f3eb0cc | 522 | if (err < 0) { |
d01c67e3 | 523 | ERR(ctx, "%s\n", strerror(-err)); |
23fc91c6 | 524 | goto fail; |
7f3eb0cc LDM |
525 | } |
526 | ||
527 | *list = kmod_list_append(*list, mod); | |
23fc91c6 | 528 | nmatch++; |
7f3eb0cc LDM |
529 | } |
530 | } | |
531 | ||
23fc91c6 LDM |
532 | return nmatch; |
533 | ||
534 | fail: | |
535 | *list = kmod_list_remove_n_latest(*list, nmatch); | |
536 | return err; | |
7f3eb0cc | 537 | } |
1487a64f | 538 | |
54ba8b34 LDM |
539 | /** |
540 | * kmod_module_get_filtered_blacklist: | |
541 | * @ctx: kmod library context | |
542 | * @input: list to be filtered with blacklist | |
543 | * @output: where to save the new list | |
544 | * | |
545 | * Given a list @input, this function filter it out with config's blacklist | |
546 | * ans save it in @output. | |
547 | * | |
548 | * Returns: 0 on success or < 0 otherwise. @output is saved with the updated | |
549 | * list. | |
550 | */ | |
c35347f1 LDM |
551 | KMOD_EXPORT int kmod_module_get_filtered_blacklist(const struct kmod_ctx *ctx, |
552 | const struct kmod_list *input, | |
553 | struct kmod_list **output) | |
1487a64f GSB |
554 | { |
555 | const struct kmod_config *config; | |
556 | const struct kmod_list *li; | |
557 | ||
558 | if (ctx == NULL || output == NULL) | |
559 | return -ENOENT; | |
560 | ||
561 | *output = NULL; | |
562 | if (input == NULL) | |
563 | return 0; | |
564 | ||
565 | config = ctx->config; | |
566 | kmod_list_foreach(li, input) { | |
567 | struct kmod_module *mod = li->data; | |
568 | const struct kmod_list *lb; | |
569 | struct kmod_list *node; | |
570 | bool filtered = false; | |
571 | kmod_list_foreach(lb, config->blacklists) { | |
572 | const char *name = lb->data; | |
573 | if (streq(name, kmod_module_get_name(mod))) { | |
574 | filtered = true; | |
575 | break; | |
576 | } | |
577 | } | |
578 | if (filtered) | |
579 | continue; | |
580 | ||
581 | node = kmod_list_append(*output, mod); | |
582 | if (node == NULL) | |
583 | goto fail; | |
584 | *output = node; | |
585 | kmod_module_ref(mod); | |
586 | } | |
587 | return 0; | |
588 | ||
589 | fail: | |
590 | kmod_module_unref_list(*output); | |
591 | *output = NULL; | |
592 | return -ENOMEM; | |
593 | } | |
33bb69b9 LDM |
594 | |
595 | KMOD_EXPORT int kmod_load_resources(struct kmod_ctx *ctx) | |
596 | { | |
79d57fcb | 597 | char path[PATH_MAX]; |
33bb69b9 LDM |
598 | size_t i; |
599 | ||
600 | if (ctx == NULL) | |
601 | return -ENOENT; | |
602 | ||
603 | for (i = 0; i < ARRAY_SIZE(index_files); i++) { | |
604 | if (ctx->indexes[i] == NULL) { | |
605 | const char *fn = index_files[i]; | |
79d57fcb GSB |
606 | size_t fnlen = strlen(fn); |
607 | const char *prefix = ""; | |
608 | const char *suffix = ""; | |
609 | ||
610 | if (fn[0] != '/') | |
611 | prefix = ctx->dirname; | |
612 | ||
613 | if (fnlen < 4 || !streq(fn + fnlen - 4, ".bin")) | |
614 | suffix = ".bin"; | |
615 | ||
616 | snprintf(path, sizeof(path), "%s/%s%s", | |
617 | prefix, fn, suffix); | |
618 | fn = path; | |
33bb69b9 LDM |
619 | |
620 | ctx->indexes[i] = index_mm_open(ctx, fn, true); | |
621 | if (ctx->indexes[i] == NULL) | |
622 | goto fail; | |
623 | } | |
624 | } | |
625 | ||
626 | return 0; | |
627 | ||
628 | fail: | |
629 | kmod_unload_resources(ctx); | |
630 | return -ENOMEM; | |
631 | } | |
632 | ||
633 | KMOD_EXPORT void kmod_unload_resources(struct kmod_ctx *ctx) | |
634 | { | |
635 | size_t i; | |
636 | ||
637 | if (ctx == NULL) | |
638 | return; | |
639 | ||
640 | for (i = 0; i < ARRAY_SIZE(index_files); i++) { | |
641 | if (ctx->indexes[i] != NULL) { | |
642 | index_mm_close(ctx->indexes[i]); | |
643 | ctx->indexes[i] = NULL; | |
644 | } | |
645 | } | |
646 | } | |
bd3f5535 | 647 | |
c35347f1 LDM |
648 | KMOD_EXPORT int kmod_resolve_alias_options(struct kmod_ctx *ctx, |
649 | const char *given_alias, | |
650 | char **options) | |
bd3f5535 GSB |
651 | { |
652 | struct kmod_list *modules = NULL, *l; | |
d917f274 | 653 | char alias[NAME_MAX]; |
bd3f5535 GSB |
654 | char *opts = NULL; |
655 | size_t optslen = 0; | |
656 | int err; | |
657 | ||
658 | if (ctx == NULL || options == NULL) | |
659 | return -ENOENT; | |
660 | ||
d470db10 LDM |
661 | if (alias_normalize(given_alias, alias, NULL) < 0) |
662 | return -EINVAL; | |
663 | ||
bd3f5535 | 664 | err = kmod_module_new_from_lookup(ctx, alias, &modules); |
ecd6bcd2 LDM |
665 | if (err < 0) |
666 | return err; | |
667 | ||
668 | kmod_list_foreach(l, modules) { | |
669 | const char *str = kmod_module_get_options(l->data); | |
670 | size_t len; | |
671 | void *tmp; | |
672 | ||
673 | if (str == NULL) | |
674 | continue; | |
675 | len = strlen(str); | |
676 | ||
677 | tmp = realloc(opts, optslen + len + 2); | |
678 | if (tmp == NULL) | |
679 | goto failed; | |
680 | opts = tmp; | |
681 | if (optslen > 0) { | |
682 | opts[optslen] = ' '; | |
683 | optslen++; | |
bd3f5535 | 684 | } |
ecd6bcd2 LDM |
685 | memcpy(opts + optslen, str, len); |
686 | optslen += len; | |
687 | opts[optslen] = '\0'; | |
bd3f5535 GSB |
688 | } |
689 | ||
690 | kmod_list_foreach(l, ctx->config->options) { | |
691 | const struct kmod_list *ml; | |
692 | const char *modname = kmod_option_get_modname(l); | |
693 | const char *str; | |
694 | bool already_done = false; | |
695 | size_t len; | |
696 | void *tmp; | |
697 | ||
698 | if (fnmatch(modname, alias, 0) != 0) | |
699 | continue; | |
700 | ||
701 | kmod_list_foreach(ml, modules) { | |
702 | const char *mln = kmod_module_get_name(ml->data); | |
703 | if (fnmatch(modname, mln, 0) == 0) { | |
704 | already_done = true; | |
705 | break; | |
706 | } | |
707 | } | |
708 | if (already_done) | |
709 | continue; | |
710 | ||
711 | str = kmod_option_get_options(l); | |
712 | len = strlen(str); | |
713 | tmp = realloc(opts, optslen + len + 2); | |
714 | if (tmp == NULL) | |
715 | goto failed; | |
716 | opts = tmp; | |
717 | if (optslen > 0) { | |
718 | opts[optslen] = ' '; | |
719 | optslen++; | |
720 | } | |
721 | memcpy(opts + optslen, str, len); | |
722 | optslen += len; | |
723 | opts[optslen] = '\0'; | |
724 | } | |
725 | ||
726 | DBG(ctx, "alias=%s options='%s'\n", alias, opts); | |
727 | kmod_module_unref_list(modules); | |
728 | *options = opts; | |
729 | return 0; | |
730 | ||
731 | failed: | |
732 | kmod_module_unref_list(modules); | |
733 | free(opts); | |
734 | ERR(ctx, "out of memory\n"); | |
735 | *options = NULL; | |
736 | return -ENOMEM; | |
737 | } | |
738 | ||
739 | const struct kmod_list *kmod_get_options(const struct kmod_ctx *ctx) | |
740 | { | |
741 | return ctx->config->options; | |
742 | } | |
743 | ||
744 | const struct kmod_list *kmod_get_install_commands(const struct kmod_ctx *ctx) | |
745 | { | |
746 | return ctx->config->install_commands; | |
747 | } | |
748 | ||
749 | const struct kmod_list *kmod_get_remove_commands(const struct kmod_ctx *ctx) | |
750 | { | |
751 | return ctx->config->remove_commands; | |
752 | } |