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Commit | Line | Data |
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ecd40ee4 | 1 | /* |
586fc304 LDM |
2 | * libkmod - interface to kernel module operations |
3 | * | |
a66a6a99 | 4 | * Copyright (C) 2011-2012 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> |
c4dc3ca8 | 32 | #include <sys/stat.h> |
ecd40ee4 | 33 | |
586fc304 LDM |
34 | #include "libkmod.h" |
35 | #include "libkmod-private.h" | |
9ba6f57b | 36 | #include "libkmod-index.h" |
ecd40ee4 | 37 | |
fd186ae9 LDM |
38 | #define KMOD_HASH_SIZE (256) |
39 | #define KMOD_LRU_MAX (128) | |
b08314f7 | 40 | #define _KMOD_INDEX_MODULES_SIZE KMOD_INDEX_MODULES_SYMBOL + 1 |
fd186ae9 | 41 | |
ecd40ee4 | 42 | /** |
586fc304 LDM |
43 | * SECTION:libkmod |
44 | * @short_description: libkmod context | |
ecd40ee4 LDM |
45 | * |
46 | * The context contains the default values for the library user, | |
47 | * and is passed to all library operations. | |
48 | */ | |
49 | ||
63be91cb LDM |
50 | static struct _index_files { |
51 | const char *fn; | |
52 | const char *prefix; | |
53 | } index_files[] = { | |
b08314f7 LDM |
54 | [KMOD_INDEX_MODULES_DEP] = { .fn = "modules.dep", .prefix = "" }, |
55 | [KMOD_INDEX_MODULES_ALIAS] = { .fn = "modules.alias", .prefix = "alias " }, | |
56 | [KMOD_INDEX_MODULES_SYMBOL] = { .fn = "modules.symbols", .prefix = "alias "}, | |
a4a75029 LDM |
57 | }; |
58 | ||
cb8d4d3e GSB |
59 | static const char *default_config_paths[] = { |
60 | "/run/modprobe.d", | |
a308abec KS |
61 | SYSCONFDIR "/modprobe.d", |
62 | ROOTPREFIX "/lib/modprobe.d", | |
cb8d4d3e GSB |
63 | NULL |
64 | }; | |
65 | ||
ecd40ee4 | 66 | /** |
586fc304 | 67 | * kmod_ctx: |
ecd40ee4 LDM |
68 | * |
69 | * Opaque object representing the library context. | |
70 | */ | |
586fc304 | 71 | struct kmod_ctx { |
ecd40ee4 | 72 | int refcount; |
8d3f3ef8 | 73 | int log_priority; |
1bdd951e | 74 | void (*log_fn)(void *data, |
e4351b05 LDM |
75 | int priority, const char *file, int line, |
76 | const char *fn, const char *format, va_list args); | |
1bdd951e | 77 | void *log_data; |
1ce08a56 GSB |
78 | const void *userdata; |
79 | char *dirname; | |
d13e606f | 80 | struct kmod_config *config; |
822913d7 | 81 | struct hash *modules_by_name; |
b08314f7 LDM |
82 | struct index_mm *indexes[_KMOD_INDEX_MODULES_SIZE]; |
83 | unsigned long long indexes_stamp[_KMOD_INDEX_MODULES_SIZE]; | |
ecd40ee4 LDM |
84 | }; |
85 | ||
1bdd951e | 86 | void kmod_log(const struct kmod_ctx *ctx, |
e4351b05 LDM |
87 | int priority, const char *file, int line, const char *fn, |
88 | const char *format, ...) | |
ecd40ee4 LDM |
89 | { |
90 | va_list args; | |
91 | ||
e5c60f1c GSB |
92 | if (ctx->log_fn == NULL) |
93 | return; | |
94 | ||
ecd40ee4 | 95 | va_start(args, format); |
1bdd951e | 96 | ctx->log_fn(ctx->log_data, priority, file, line, fn, format, args); |
ecd40ee4 LDM |
97 | va_end(args); |
98 | } | |
99 | ||
1bdd951e | 100 | static void log_filep(void *data, |
e4351b05 LDM |
101 | int priority, const char *file, int line, |
102 | const char *fn, const char *format, va_list args) | |
ecd40ee4 | 103 | { |
1bdd951e GSB |
104 | FILE *fp = data; |
105 | fprintf(fp, "libkmod: %s: ", fn); | |
106 | vfprintf(fp, format, args); | |
ecd40ee4 LDM |
107 | } |
108 | ||
1ce08a56 | 109 | const char *kmod_get_dirname(const struct kmod_ctx *ctx) |
221631d5 LDM |
110 | { |
111 | return ctx->dirname; | |
112 | } | |
113 | ||
ecd40ee4 | 114 | /** |
586fc304 LDM |
115 | * kmod_get_userdata: |
116 | * @ctx: kmod library context | |
ecd40ee4 LDM |
117 | * |
118 | * Retrieve stored data pointer from library context. This might be useful | |
be5a6dea | 119 | * to access from callbacks. |
ecd40ee4 LDM |
120 | * |
121 | * Returns: stored userdata | |
54ba8b34 | 122 | */ |
6d177553 | 123 | KMOD_EXPORT void *kmod_get_userdata(const struct kmod_ctx *ctx) |
ecd40ee4 LDM |
124 | { |
125 | if (ctx == NULL) | |
126 | return NULL; | |
1ce08a56 | 127 | return (void *)ctx->userdata; |
ecd40ee4 LDM |
128 | } |
129 | ||
130 | /** | |
586fc304 LDM |
131 | * kmod_set_userdata: |
132 | * @ctx: kmod library context | |
ecd40ee4 LDM |
133 | * @userdata: data pointer |
134 | * | |
135 | * Store custom @userdata in the library context. | |
54ba8b34 | 136 | */ |
1ce08a56 | 137 | KMOD_EXPORT void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata) |
ecd40ee4 LDM |
138 | { |
139 | if (ctx == NULL) | |
140 | return; | |
141 | ctx->userdata = userdata; | |
142 | } | |
143 | ||
144 | static int log_priority(const char *priority) | |
145 | { | |
146 | char *endptr; | |
147 | int prio; | |
148 | ||
149 | prio = strtol(priority, &endptr, 10); | |
150 | if (endptr[0] == '\0' || isspace(endptr[0])) | |
151 | return prio; | |
152 | if (strncmp(priority, "err", 3) == 0) | |
153 | return LOG_ERR; | |
154 | if (strncmp(priority, "info", 4) == 0) | |
155 | return LOG_INFO; | |
156 | if (strncmp(priority, "debug", 5) == 0) | |
157 | return LOG_DEBUG; | |
158 | return 0; | |
159 | } | |
160 | ||
a308abec | 161 | static const char *dirname_default_prefix = ROOTPREFIX "/lib/modules"; |
904c63aa | 162 | |
1ce08a56 | 163 | static char *get_kernel_release(const char *dirname) |
221631d5 LDM |
164 | { |
165 | struct utsname u; | |
904c63aa LDM |
166 | char *p; |
167 | ||
168 | if (dirname != NULL) | |
2e092e19 | 169 | return path_make_absolute_cwd(dirname); |
221631d5 LDM |
170 | |
171 | if (uname(&u) < 0) | |
172 | return NULL; | |
173 | ||
904c63aa LDM |
174 | if (asprintf(&p, "%s/%s", dirname_default_prefix, u.release) < 0) |
175 | return NULL; | |
176 | ||
177 | return p; | |
221631d5 LDM |
178 | } |
179 | ||
ecd40ee4 | 180 | /** |
586fc304 | 181 | * kmod_new: |
cb8d4d3e | 182 | * @dirname: what to consider as linux module's directory, if NULL |
2f47c7fa LDM |
183 | * defaults to $rootprefix/lib/modules/`uname -r`. If it's relative, |
184 | * it's treated as relative to current the current working | |
185 | * directory. Otherwise, give an absolute dirname. | |
cb8d4d3e | 186 | * @config_paths: ordered array of paths (directories or files) where |
be5a6dea LDM |
187 | * to load from user-defined configuration parameters such as |
188 | * alias, blacklists, commands (install, remove). If | |
189 | * NULL defaults to /run/modprobe.d, /etc/modprobe.d and | |
2f47c7fa LDM |
190 | * $rootprefix/lib/modprobe.d. Give an empty vector if |
191 | * configuration should not be read. This array must be null | |
192 | * terminated. | |
cb8d4d3e | 193 | * |
e1daa4f5 LDM |
194 | * Create kmod library context. This reads the kmod configuration |
195 | * and fills in the default values. | |
196 | * | |
197 | * The initial refcount is 1, and needs to be decremented to | |
198 | * release the resources of the kmod library context. | |
199 | * | |
586fc304 | 200 | * Returns: a new kmod library context |
54ba8b34 | 201 | */ |
c35347f1 LDM |
202 | KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname, |
203 | const char * const *config_paths) | |
ecd40ee4 LDM |
204 | { |
205 | const char *env; | |
52a7704f | 206 | struct kmod_ctx *ctx; |
d13e606f | 207 | int err; |
ecd40ee4 | 208 | |
52a7704f LDM |
209 | ctx = calloc(1, sizeof(struct kmod_ctx)); |
210 | if (!ctx) | |
211 | return NULL; | |
ecd40ee4 | 212 | |
52a7704f | 213 | ctx->refcount = 1; |
1bdd951e GSB |
214 | ctx->log_fn = log_filep; |
215 | ctx->log_data = stderr; | |
52a7704f | 216 | ctx->log_priority = LOG_ERR; |
ecd40ee4 | 217 | |
904c63aa | 218 | ctx->dirname = get_kernel_release(dirname); |
221631d5 | 219 | |
ecd40ee4 | 220 | /* environment overwrites config */ |
586fc304 | 221 | env = getenv("KMOD_LOG"); |
ecd40ee4 | 222 | if (env != NULL) |
52a7704f | 223 | kmod_set_log_priority(ctx, log_priority(env)); |
ecd40ee4 | 224 | |
cb8d4d3e GSB |
225 | if (config_paths == NULL) |
226 | config_paths = default_config_paths; | |
227 | err = kmod_config_new(ctx, &ctx->config, config_paths); | |
d13e606f | 228 | if (err < 0) { |
fd186ae9 LDM |
229 | ERR(ctx, "could not create config\n"); |
230 | goto fail; | |
231 | } | |
232 | ||
822913d7 | 233 | ctx->modules_by_name = hash_new(KMOD_HASH_SIZE, NULL); |
fd186ae9 LDM |
234 | if (ctx->modules_by_name == NULL) { |
235 | ERR(ctx, "could not create by-name hash\n"); | |
236 | goto fail; | |
d13e606f | 237 | } |
7c2ab358 | 238 | |
ae6df84a LDM |
239 | INFO(ctx, "ctx %p created\n", ctx); |
240 | DBG(ctx, "log_priority=%d\n", ctx->log_priority); | |
52a7704f LDM |
241 | |
242 | return ctx; | |
fd186ae9 LDM |
243 | |
244 | fail: | |
245 | free(ctx->modules_by_name); | |
246 | free(ctx->dirname); | |
247 | free(ctx); | |
248 | return NULL; | |
ecd40ee4 LDM |
249 | } |
250 | ||
251 | /** | |
586fc304 LDM |
252 | * kmod_ref: |
253 | * @ctx: kmod library context | |
ecd40ee4 | 254 | * |
586fc304 | 255 | * Take a reference of the kmod library context. |
ecd40ee4 | 256 | * |
586fc304 | 257 | * Returns: the passed kmod library context |
54ba8b34 | 258 | */ |
586fc304 | 259 | KMOD_EXPORT struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx) |
ecd40ee4 LDM |
260 | { |
261 | if (ctx == NULL) | |
262 | return NULL; | |
263 | ctx->refcount++; | |
264 | return ctx; | |
265 | } | |
266 | ||
267 | /** | |
586fc304 LDM |
268 | * kmod_unref: |
269 | * @ctx: kmod library context | |
ecd40ee4 | 270 | * |
586fc304 | 271 | * Drop a reference of the kmod library context. If the refcount |
ecd40ee4 | 272 | * reaches zero, the resources of the context will be released. |
54ba8b34 | 273 | */ |
586fc304 | 274 | KMOD_EXPORT struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx) |
ecd40ee4 LDM |
275 | { |
276 | if (ctx == NULL) | |
277 | return NULL; | |
4d1e689a LDM |
278 | |
279 | if (--ctx->refcount > 0) | |
ecd40ee4 | 280 | return ctx; |
33bb69b9 | 281 | |
ae6df84a | 282 | INFO(ctx, "context %p released\n", ctx); |
33bb69b9 LDM |
283 | |
284 | kmod_unload_resources(ctx); | |
822913d7 | 285 | hash_free(ctx->modules_by_name); |
1ce08a56 | 286 | free(ctx->dirname); |
d13e606f GSB |
287 | if (ctx->config) |
288 | kmod_config_free(ctx->config); | |
33bb69b9 | 289 | |
ecd40ee4 LDM |
290 | free(ctx); |
291 | return NULL; | |
292 | } | |
293 | ||
294 | /** | |
586fc304 LDM |
295 | * kmod_set_log_fn: |
296 | * @ctx: kmod library context | |
ecd40ee4 | 297 | * @log_fn: function to be called for logging messages |
b5b4d8e8 | 298 | * @data: data to pass to log function |
ecd40ee4 LDM |
299 | * |
300 | * The built-in logging writes to stderr. It can be | |
301 | * overridden by a custom function, to plug log messages | |
302 | * into the user's logging functionality. | |
54ba8b34 | 303 | */ |
586fc304 | 304 | KMOD_EXPORT void kmod_set_log_fn(struct kmod_ctx *ctx, |
1bdd951e | 305 | void (*log_fn)(void *data, |
e4351b05 LDM |
306 | int priority, const char *file, |
307 | int line, const char *fn, | |
1bdd951e GSB |
308 | const char *format, va_list args), |
309 | const void *data) | |
ecd40ee4 | 310 | { |
e5c60f1c GSB |
311 | if (ctx == NULL) |
312 | return; | |
ecd40ee4 | 313 | ctx->log_fn = log_fn; |
1bdd951e | 314 | ctx->log_data = (void *)data; |
ae6df84a | 315 | INFO(ctx, "custom logging function %p registered\n", log_fn); |
ecd40ee4 LDM |
316 | } |
317 | ||
318 | /** | |
586fc304 LDM |
319 | * kmod_get_log_priority: |
320 | * @ctx: kmod library context | |
ecd40ee4 LDM |
321 | * |
322 | * Returns: the current logging priority | |
54ba8b34 | 323 | */ |
6d177553 | 324 | KMOD_EXPORT int kmod_get_log_priority(const struct kmod_ctx *ctx) |
ecd40ee4 | 325 | { |
e5c60f1c GSB |
326 | if (ctx == NULL) |
327 | return -1; | |
ecd40ee4 LDM |
328 | return ctx->log_priority; |
329 | } | |
330 | ||
331 | /** | |
586fc304 LDM |
332 | * kmod_set_log_priority: |
333 | * @ctx: kmod library context | |
ecd40ee4 LDM |
334 | * @priority: the new logging priority |
335 | * | |
336 | * Set the current logging priority. The value controls which messages | |
337 | * are logged. | |
54ba8b34 | 338 | */ |
586fc304 | 339 | KMOD_EXPORT void kmod_set_log_priority(struct kmod_ctx *ctx, int priority) |
ecd40ee4 | 340 | { |
e5c60f1c GSB |
341 | if (ctx == NULL) |
342 | return; | |
ecd40ee4 LDM |
343 | ctx->log_priority = priority; |
344 | } | |
7f3eb0cc | 345 | |
fd186ae9 | 346 | struct kmod_module *kmod_pool_get_module(struct kmod_ctx *ctx, |
8bdeca11 | 347 | const char *key) |
fd186ae9 LDM |
348 | { |
349 | struct kmod_module *mod; | |
350 | ||
822913d7 | 351 | mod = hash_find(ctx->modules_by_name, key); |
fd186ae9 | 352 | |
8bdeca11 | 353 | DBG(ctx, "get module name='%s' found=%p\n", key, mod); |
fd186ae9 LDM |
354 | |
355 | return mod; | |
356 | } | |
357 | ||
8bdeca11 LDM |
358 | void kmod_pool_add_module(struct kmod_ctx *ctx, struct kmod_module *mod, |
359 | const char *key) | |
fd186ae9 | 360 | { |
8bdeca11 | 361 | DBG(ctx, "add %p key='%s'\n", mod, key); |
fd186ae9 | 362 | |
822913d7 | 363 | hash_add(ctx->modules_by_name, key, mod); |
fd186ae9 LDM |
364 | } |
365 | ||
8bdeca11 LDM |
366 | void kmod_pool_del_module(struct kmod_ctx *ctx, struct kmod_module *mod, |
367 | const char *key) | |
fd186ae9 | 368 | { |
8bdeca11 | 369 | DBG(ctx, "del %p key='%s'\n", mod, key); |
fd186ae9 | 370 | |
822913d7 | 371 | hash_del(ctx->modules_by_name, key); |
fd186ae9 | 372 | } |
9ba6f57b | 373 | |
a009482c | 374 | static int kmod_lookup_alias_from_alias_bin(struct kmod_ctx *ctx, |
810803db | 375 | enum kmod_index index_number, |
7b30f4f4 | 376 | const char *name, |
9ba6f57b LDM |
377 | struct kmod_list **list) |
378 | { | |
6f1bc6e3 | 379 | int err, nmatch = 0; |
0fbdfef3 | 380 | struct index_file *idx; |
9ba6f57b LDM |
381 | struct index_value *realnames, *realname; |
382 | ||
65a84f55 | 383 | if (ctx->indexes[index_number] != NULL) { |
3e245be1 | 384 | DBG(ctx, "use mmaped index '%s' for name=%s\n", |
63be91cb | 385 | index_files[index_number].fn, name); |
65a84f55 LDM |
386 | realnames = index_mm_searchwild(ctx->indexes[index_number], |
387 | name); | |
9fd58f30 | 388 | } else { |
65a84f55 LDM |
389 | char fn[PATH_MAX]; |
390 | ||
3b209959 | 391 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
63be91cb | 392 | index_files[index_number].fn); |
9ba6f57b | 393 | |
65a84f55 | 394 | DBG(ctx, "file=%s name=%s\n", fn, name); |
9ba6f57b | 395 | |
65a84f55 LDM |
396 | idx = index_file_open(fn); |
397 | if (idx == NULL) | |
398 | return -ENOSYS; | |
9ba6f57b | 399 | |
65a84f55 LDM |
400 | realnames = index_searchwild(idx, name); |
401 | index_file_close(idx); | |
402 | } | |
4272d087 | 403 | |
a955f71f | 404 | for (realname = realnames; realname; realname = realname->next) { |
9ba6f57b LDM |
405 | struct kmod_module *mod; |
406 | ||
ee3b3ff2 | 407 | err = kmod_module_new_from_alias(ctx, name, realname->value, &mod); |
9ba6f57b LDM |
408 | if (err < 0) { |
409 | ERR(ctx, "%s\n", strerror(-err)); | |
23fc91c6 | 410 | goto fail; |
9ba6f57b LDM |
411 | } |
412 | ||
413 | *list = kmod_list_append(*list, mod); | |
23fc91c6 | 414 | nmatch++; |
9ba6f57b LDM |
415 | } |
416 | ||
9ba6f57b | 417 | index_values_free(realnames); |
23fc91c6 LDM |
418 | return nmatch; |
419 | ||
420 | fail: | |
421 | *list = kmod_list_remove_n_latest(*list, nmatch); | |
9ba6f57b | 422 | return err; |
7b30f4f4 LDM |
423 | |
424 | } | |
425 | ||
7b30f4f4 LDM |
426 | int kmod_lookup_alias_from_symbols_file(struct kmod_ctx *ctx, const char *name, |
427 | struct kmod_list **list) | |
428 | { | |
0c010fae | 429 | if (!strstartswith(name, "symbol:")) |
7b30f4f4 LDM |
430 | return 0; |
431 | ||
b08314f7 LDM |
432 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_MODULES_SYMBOL, |
433 | name, list); | |
9ba6f57b LDM |
434 | } |
435 | ||
49e61ca3 LDM |
436 | int kmod_lookup_alias_from_aliases_file(struct kmod_ctx *ctx, const char *name, |
437 | struct kmod_list **list) | |
438 | { | |
b08314f7 LDM |
439 | return kmod_lookup_alias_from_alias_bin(ctx, KMOD_INDEX_MODULES_ALIAS, |
440 | name, list); | |
49e61ca3 LDM |
441 | } |
442 | ||
671d4894 | 443 | char *kmod_search_moddep(struct kmod_ctx *ctx, const char *name) |
1eb2ef69 LDM |
444 | { |
445 | struct index_file *idx; | |
446 | char fn[PATH_MAX]; | |
447 | char *line; | |
448 | ||
b08314f7 | 449 | if (ctx->indexes[KMOD_INDEX_MODULES_DEP]) { |
85132101 | 450 | DBG(ctx, "use mmaped index '%s' modname=%s\n", |
b08314f7 LDM |
451 | index_files[KMOD_INDEX_MODULES_DEP].fn, name); |
452 | return index_mm_search(ctx->indexes[KMOD_INDEX_MODULES_DEP], | |
453 | name); | |
85132101 GSB |
454 | } |
455 | ||
a4a75029 | 456 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, |
b08314f7 | 457 | index_files[KMOD_INDEX_MODULES_DEP].fn); |
1eb2ef69 LDM |
458 | |
459 | DBG(ctx, "file=%s modname=%s\n", fn, name); | |
460 | ||
461 | idx = index_file_open(fn); | |
462 | if (idx == NULL) { | |
b787b569 | 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 | |
f4fc5523 LDM |
539 | int kmod_lookup_alias_from_commands(struct kmod_ctx *ctx, const char *name, |
540 | struct kmod_list **list) | |
541 | { | |
542 | struct kmod_config *config = ctx->config; | |
543 | struct kmod_list *l, *node; | |
544 | int err, nmatch = 0; | |
545 | ||
546 | kmod_list_foreach(l, config->install_commands) { | |
547 | const char *modname = kmod_command_get_modname(l); | |
548 | ||
549 | if (streq(modname, name)) { | |
550 | const char *cmd = kmod_command_get_command(l); | |
551 | struct kmod_module *mod; | |
552 | ||
553 | err = kmod_module_new_from_name(ctx, modname, &mod); | |
554 | if (err < 0) { | |
555 | ERR(ctx, "%s\n", strerror(-err)); | |
556 | return err; | |
557 | } | |
558 | ||
559 | node = kmod_list_append(*list, mod); | |
560 | if (node == NULL) { | |
561 | ERR(ctx, "out of memory\n"); | |
562 | return -ENOMEM; | |
563 | } | |
564 | ||
565 | *list = node; | |
566 | nmatch = 1; | |
567 | ||
568 | kmod_module_set_install_commands(mod, cmd); | |
569 | ||
570 | /* | |
571 | * match only the first one, like modprobe from | |
572 | * module-init-tools does | |
573 | */ | |
574 | break; | |
575 | } | |
576 | } | |
577 | ||
578 | if (nmatch) | |
579 | return nmatch; | |
580 | ||
581 | kmod_list_foreach(l, config->remove_commands) { | |
582 | const char *modname = kmod_command_get_modname(l); | |
583 | ||
584 | if (streq(modname, name)) { | |
585 | const char *cmd = kmod_command_get_command(l); | |
586 | struct kmod_module *mod; | |
587 | ||
588 | err = kmod_module_new_from_name(ctx, modname, &mod); | |
589 | if (err < 0) { | |
590 | ERR(ctx, "%s\n", strerror(-err)); | |
591 | return err; | |
592 | } | |
593 | ||
594 | node = kmod_list_append(*list, mod); | |
595 | if (node == NULL) { | |
596 | ERR(ctx, "out of memory\n"); | |
597 | return -ENOMEM; | |
598 | } | |
599 | ||
600 | *list = node; | |
601 | nmatch = 1; | |
602 | ||
603 | kmod_module_set_remove_commands(mod, cmd); | |
604 | ||
605 | /* | |
606 | * match only the first one, like modprobe from | |
607 | * module-init-tools does | |
608 | */ | |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
613 | return nmatch; | |
614 | } | |
615 | ||
c4dc3ca8 LDM |
616 | static bool is_cache_invalid(const char *path, unsigned long long stamp) |
617 | { | |
618 | struct stat st; | |
619 | ||
620 | if (stat(path, &st) < 0) | |
621 | return true; | |
622 | ||
623 | if (stamp != ts_usec(&st.st_mtim)) | |
624 | return true; | |
625 | ||
626 | return false; | |
627 | } | |
628 | ||
629 | /** | |
630 | * kmod_validate_resources: | |
631 | * @ctx: kmod library context | |
632 | * | |
633 | * Check if indexes and configuration files changed on disk and the current | |
634 | * context is not valid anymore. | |
635 | * | |
f4cc6ea5 | 636 | * Returns: KMOD_RESOURCES_OK if resources are still valid, |
c4dc3ca8 LDM |
637 | * KMOD_RESOURCES_MUST_RELOAD if it's sufficient to call |
638 | * kmod_unload_resources() and kmod_load_resources() or | |
639 | * KMOD_RESOURCES_MUST_RECREATE if @ctx must be re-created. | |
640 | */ | |
641 | KMOD_EXPORT int kmod_validate_resources(struct kmod_ctx *ctx) | |
642 | { | |
643 | struct kmod_list *l; | |
644 | size_t i; | |
645 | ||
646 | if (ctx == NULL || ctx->config == NULL) | |
647 | return KMOD_RESOURCES_MUST_RECREATE; | |
648 | ||
649 | kmod_list_foreach(l, ctx->config->paths) { | |
650 | struct kmod_config_path *cf = l->data; | |
651 | ||
652 | if (is_cache_invalid(cf->path, cf->stamp)) | |
653 | return KMOD_RESOURCES_MUST_RECREATE; | |
654 | } | |
655 | ||
b08314f7 | 656 | for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) { |
c4dc3ca8 LDM |
657 | char path[PATH_MAX]; |
658 | ||
659 | if (ctx->indexes[i] == NULL) | |
660 | continue; | |
661 | ||
662 | snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname, | |
63be91cb | 663 | index_files[i].fn); |
c4dc3ca8 LDM |
664 | |
665 | if (is_cache_invalid(path, ctx->indexes_stamp[i])) | |
666 | return KMOD_RESOURCES_MUST_RELOAD; | |
667 | } | |
668 | ||
669 | return KMOD_RESOURCES_OK; | |
670 | } | |
671 | ||
be5a6dea LDM |
672 | /** |
673 | * kmod_load_resources: | |
674 | * @ctx: kmod library context | |
675 | * | |
676 | * Load indexes and keep them open in @ctx. This way it's faster to lookup | |
677 | * information within the indexes. If this function is not called before a | |
678 | * search, the necessary index is always opened and closed. | |
679 | * | |
680 | * If user will do more than one or two lookups, insertions, deletions, most | |
681 | * likely it's good to call this function first. Particularly in a daemon like | |
682 | * udev that on bootup issues hundreds of calls to lookup the index, calling | |
683 | * this function will speedup the searches. | |
684 | * | |
685 | * Returns: 0 on success or < 0 otherwise. | |
686 | */ | |
33bb69b9 LDM |
687 | KMOD_EXPORT int kmod_load_resources(struct kmod_ctx *ctx) |
688 | { | |
689 | size_t i; | |
690 | ||
691 | if (ctx == NULL) | |
692 | return -ENOENT; | |
693 | ||
b08314f7 | 694 | for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) { |
6de8f6e9 | 695 | char path[PATH_MAX]; |
3e676766 | 696 | |
16ca3666 | 697 | if (ctx->indexes[i] != NULL) { |
63be91cb LDM |
698 | INFO(ctx, "Index %s already loaded\n", |
699 | index_files[i].fn); | |
3e676766 LDM |
700 | continue; |
701 | } | |
79d57fcb | 702 | |
6de8f6e9 | 703 | snprintf(path, sizeof(path), "%s/%s.bin", ctx->dirname, |
63be91cb | 704 | index_files[i].fn); |
9fd58f30 LDM |
705 | ctx->indexes[i] = index_mm_open(ctx, path, true, |
706 | &ctx->indexes_stamp[i]); | |
3e676766 LDM |
707 | if (ctx->indexes[i] == NULL) |
708 | goto fail; | |
33bb69b9 LDM |
709 | } |
710 | ||
711 | return 0; | |
712 | ||
713 | fail: | |
714 | kmod_unload_resources(ctx); | |
715 | return -ENOMEM; | |
716 | } | |
717 | ||
be5a6dea LDM |
718 | /** |
719 | * kmod_unload_resources: | |
720 | * @ctx: kmod library context | |
721 | * | |
722 | * Unload all the indexes. This will free the resources to maintain the index | |
723 | * open and all subsequent searches will need to open and close the index. | |
724 | * | |
725 | * User is free to call kmod_load_resources() and kmod_unload_resources() as | |
726 | * many times as wanted during the lifecycle of @ctx. For example, if a daemon | |
727 | * knows that when starting up it will lookup a lot of modules, it could call | |
728 | * kmod_load_resources() and after the first burst of searches is gone, it | |
729 | * could free the resources by calling kmod_unload_resources(). | |
730 | * | |
731 | * Returns: 0 on success or < 0 otherwise. | |
732 | */ | |
33bb69b9 LDM |
733 | KMOD_EXPORT void kmod_unload_resources(struct kmod_ctx *ctx) |
734 | { | |
735 | size_t i; | |
736 | ||
737 | if (ctx == NULL) | |
738 | return; | |
739 | ||
b08314f7 | 740 | for (i = 0; i < _KMOD_INDEX_MODULES_SIZE; i++) { |
33bb69b9 LDM |
741 | if (ctx->indexes[i] != NULL) { |
742 | index_mm_close(ctx->indexes[i]); | |
743 | ctx->indexes[i] = NULL; | |
9fd58f30 | 744 | ctx->indexes_stamp[i] = 0; |
33bb69b9 LDM |
745 | } |
746 | } | |
747 | } | |
bd3f5535 | 748 | |
0224482e LDM |
749 | /** |
750 | * kmod_dump_index: | |
751 | * @ctx: kmod library context | |
752 | * @type: index to dump | |
753 | * @fd: file descriptor to dump index to | |
754 | * | |
755 | * Dump index to file descriptor | |
756 | * | |
757 | * Returns: 0 on success or < 0 otherwise. | |
758 | */ | |
758428a7 LDM |
759 | KMOD_EXPORT int kmod_dump_index(struct kmod_ctx *ctx, enum kmod_index type, |
760 | int fd) | |
761 | { | |
762 | if (ctx == NULL) | |
763 | return -ENOSYS; | |
764 | ||
765 | if (type < 0 || type >= _KMOD_INDEX_MODULES_SIZE) | |
766 | return -ENOENT; | |
767 | ||
768 | if (ctx->indexes[type] != NULL) { | |
769 | DBG(ctx, "use mmaped index '%s'\n", index_files[type].fn); | |
770 | index_mm_dump(ctx->indexes[type], fd, | |
771 | index_files[type].prefix); | |
772 | } else { | |
773 | char fn[PATH_MAX]; | |
774 | struct index_file *idx; | |
775 | ||
776 | snprintf(fn, sizeof(fn), "%s/%s.bin", ctx->dirname, | |
777 | index_files[type].fn); | |
778 | ||
779 | DBG(ctx, "file=%s\n", fn); | |
780 | ||
781 | idx = index_file_open(fn); | |
782 | if (idx == NULL) | |
783 | return -ENOSYS; | |
784 | ||
785 | index_dump(idx, fd, index_files[type].prefix); | |
786 | index_file_close(idx); | |
787 | } | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
c1c9c446 LDM |
792 | const struct kmod_list *kmod_get_blacklists(const struct kmod_ctx *ctx) |
793 | { | |
794 | return ctx->config->blacklists; | |
795 | } | |
796 | ||
bd3f5535 GSB |
797 | const struct kmod_list *kmod_get_options(const struct kmod_ctx *ctx) |
798 | { | |
799 | return ctx->config->options; | |
800 | } | |
801 | ||
802 | const struct kmod_list *kmod_get_install_commands(const struct kmod_ctx *ctx) | |
803 | { | |
804 | return ctx->config->install_commands; | |
805 | } | |
806 | ||
807 | const struct kmod_list *kmod_get_remove_commands(const struct kmod_ctx *ctx) | |
808 | { | |
809 | return ctx->config->remove_commands; | |
810 | } | |
1c522600 GSB |
811 | |
812 | const struct kmod_list *kmod_get_softdeps(const struct kmod_ctx *ctx) | |
813 | { | |
814 | return ctx->config->softdeps; | |
815 | } | |
8b5ee618 LDM |
816 | |
817 | const struct kmod_list *kmod_get_aliases(const struct kmod_ctx *ctx) | |
818 | { | |
819 | return ctx->config->aliases; | |
820 | } |