Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 1 | /* |
| 2 | * libkmod - interface to kernel module operations |
| 3 | * |
| 4 | * Copyright (C) 2011 ProFUSION embedded systems |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 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 |
| 8 | * License as published by the Free Software Foundation version 2.1. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 20 | #include <assert.h> |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <stddef.h> |
| 24 | #include <stdarg.h> |
| 25 | #include <unistd.h> |
| 26 | #include <errno.h> |
| 27 | #include <string.h> |
| 28 | #include <ctype.h> |
| 29 | #include <inttypes.h> |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 30 | #include <limits.h> |
| 31 | #include <dirent.h> |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 32 | #include <sys/stat.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/mman.h> |
| 35 | #include <string.h> |
| 36 | |
| 37 | #include "libkmod.h" |
| 38 | #include "libkmod-private.h" |
| 39 | |
| 40 | /** |
| 41 | * kmod_module: |
| 42 | * |
| 43 | * Opaque object representing a module. |
| 44 | */ |
| 45 | struct kmod_module { |
| 46 | struct kmod_ctx *ctx; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 47 | const char *path; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 48 | struct kmod_list *dep; |
Gustavo Sverzut Barbieri | 8d3f3ef | 2011-12-02 21:10:24 -0200 | [diff] [blame] | 49 | int refcount; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 50 | struct { |
| 51 | bool dep : 1; |
| 52 | } init; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 53 | char name[]; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 54 | }; |
| 55 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 56 | static char *path_to_modname(const char *path, char buf[NAME_MAX], size_t *len) |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 57 | { |
| 58 | char *modname; |
| 59 | char *c; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 60 | size_t s; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 61 | |
| 62 | modname = basename(path); |
| 63 | if (modname == NULL || modname[0] == '\0') |
| 64 | return NULL; |
| 65 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 66 | if (buf) { |
| 67 | buf[NAME_MAX] = '\0'; |
| 68 | modname = strncpy(buf, modname, NAME_MAX - 1); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 69 | } |
| 70 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 71 | for (c = modname, s = 0; *c != '\0' && *c != '.'; c++) { |
| 72 | if (*c == '-') |
| 73 | *c = '_'; |
| 74 | s++; |
| 75 | } |
| 76 | |
| 77 | if (len) |
| 78 | *len = s; |
| 79 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 80 | *c = '\0'; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 81 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 82 | return modname; |
| 83 | } |
| 84 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 85 | int kmod_module_parse_depline(struct kmod_module *mod, char *line) |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 86 | { |
| 87 | struct kmod_ctx *ctx = mod->ctx; |
| 88 | struct kmod_list *list = NULL; |
| 89 | char *p, *saveptr; |
| 90 | int err, n = 0; |
| 91 | |
| 92 | assert(!mod->init.dep && mod->dep == NULL); |
| 93 | mod->init.dep = true; |
| 94 | |
| 95 | p = strchr(line, ':'); |
| 96 | if (p == NULL) |
| 97 | return 0; |
| 98 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 99 | *p = '\0'; |
| 100 | if (mod->path == NULL) |
| 101 | mod->path = strdup(line); |
| 102 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 103 | p++; |
| 104 | |
| 105 | for (p = strtok_r(p, " \t", &saveptr); p != NULL; |
| 106 | p = strtok_r(NULL, " \t", &saveptr)) { |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 107 | const char *modname = path_to_modname(p, NULL, NULL); |
Lucas De Marchi | 1fc1c9a | 2011-12-02 10:00:03 -0200 | [diff] [blame] | 108 | struct kmod_module *depmod; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 109 | |
Lucas De Marchi | 1fc1c9a | 2011-12-02 10:00:03 -0200 | [diff] [blame] | 110 | err = kmod_module_new_from_name(ctx, modname, &depmod); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 111 | if (err < 0) { |
| 112 | ERR(ctx, "ctx=%p modname=%s error=%s\n", |
| 113 | ctx, modname, strerror(-err)); |
| 114 | goto fail; |
| 115 | } |
| 116 | |
| 117 | DBG(ctx, "add dep: %s\n", modname); |
| 118 | |
Lucas De Marchi | 1fc1c9a | 2011-12-02 10:00:03 -0200 | [diff] [blame] | 119 | list = kmod_list_append(list, depmod); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 120 | n++; |
| 121 | } |
| 122 | |
| 123 | DBG(ctx, "%d dependencies for %s\n", n, mod->name); |
| 124 | |
| 125 | mod->dep = list; |
| 126 | return n; |
| 127 | |
| 128 | fail: |
| 129 | kmod_module_unref_list(list); |
| 130 | mod->init.dep = false; |
| 131 | return err; |
| 132 | } |
| 133 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 134 | KMOD_EXPORT int kmod_module_new_from_name(struct kmod_ctx *ctx, |
| 135 | const char *name, |
| 136 | struct kmod_module **mod) |
| 137 | { |
| 138 | struct kmod_module *m; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 139 | size_t namelen; |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 140 | char name_norm[NAME_MAX]; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 141 | |
| 142 | if (ctx == NULL || name == NULL) |
| 143 | return -ENOENT; |
| 144 | |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 145 | path_to_modname(name, name_norm, &namelen); |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 146 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 147 | m = kmod_pool_get_module(ctx, name_norm); |
| 148 | if (m != NULL) { |
| 149 | *mod = kmod_module_ref(m); |
| 150 | return 0; |
| 151 | } |
| 152 | |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 153 | m = calloc(1, sizeof(*m) + namelen + 1); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 154 | if (m == NULL) { |
| 155 | free(m); |
| 156 | return -ENOMEM; |
| 157 | } |
| 158 | |
| 159 | m->ctx = kmod_ref(ctx); |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 160 | memcpy(m->name, name_norm, namelen + 1); |
Gustavo Sverzut Barbieri | 87ca03b | 2011-12-04 12:34:02 -0200 | [diff] [blame] | 161 | m->refcount = 1; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 162 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 163 | kmod_pool_add_module(ctx, m); |
| 164 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 165 | *mod = m; |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | KMOD_EXPORT int kmod_module_new_from_path(struct kmod_ctx *ctx, |
| 171 | const char *path, |
| 172 | struct kmod_module **mod) |
| 173 | { |
| 174 | struct kmod_module *m; |
| 175 | int err; |
| 176 | struct stat st; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 177 | char name[NAME_MAX]; |
| 178 | size_t namelen; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 179 | |
| 180 | if (ctx == NULL || path == NULL) |
| 181 | return -ENOENT; |
| 182 | |
| 183 | err = stat(path, &st); |
| 184 | if (err < 0) |
| 185 | return -errno; |
| 186 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 187 | path_to_modname(path, name, &namelen); |
| 188 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 189 | m = kmod_pool_get_module(ctx, name); |
| 190 | if (m != NULL) { |
| 191 | *mod = kmod_module_ref(m); |
| 192 | return 0; |
| 193 | } |
| 194 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 195 | m = calloc(1, sizeof(*m) + namelen + 1); |
| 196 | if (m == NULL) |
| 197 | return -errno; |
| 198 | |
| 199 | m->path = strdup(path); |
| 200 | if (m->path == NULL) { |
| 201 | err = -errno; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 202 | free(m); |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 203 | return err; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | m->ctx = kmod_ref(ctx); |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 207 | memcpy(m->name, name, namelen); |
Gustavo Sverzut Barbieri | 87ca03b | 2011-12-04 12:34:02 -0200 | [diff] [blame] | 208 | m->refcount = 1; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 209 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 210 | kmod_pool_add_module(ctx, m); |
| 211 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 212 | *mod = m; |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | KMOD_EXPORT struct kmod_module *kmod_module_unref(struct kmod_module *mod) |
| 218 | { |
| 219 | if (mod == NULL) |
| 220 | return NULL; |
| 221 | |
| 222 | if (--mod->refcount > 0) |
| 223 | return mod; |
| 224 | |
| 225 | DBG(mod->ctx, "kmod_module %p released\n", mod); |
| 226 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 227 | kmod_module_unref_list(mod->dep); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 228 | kmod_unref(mod->ctx); |
| 229 | free((char *) mod->path); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 230 | free(mod); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | KMOD_EXPORT struct kmod_module *kmod_module_ref(struct kmod_module *mod) |
| 235 | { |
| 236 | if (mod == NULL) |
| 237 | return NULL; |
| 238 | |
| 239 | mod->refcount++; |
| 240 | |
| 241 | return mod; |
| 242 | } |
| 243 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 244 | #define CHECK_ERR_AND_FINISH(_err, _label_err, _list, label_finish) \ |
| 245 | do { \ |
| 246 | if ((_err) < 0) \ |
| 247 | goto _label_err; \ |
| 248 | if (*(_list) != NULL) \ |
| 249 | goto finish; \ |
| 250 | } while (0) |
| 251 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 252 | KMOD_EXPORT int kmod_module_new_from_lookup(struct kmod_ctx *ctx, |
| 253 | const char *alias, |
| 254 | struct kmod_list **list) |
| 255 | { |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 256 | int err; |
| 257 | |
| 258 | if (ctx == NULL || alias == NULL) |
| 259 | return -ENOENT; |
| 260 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 261 | if (list == NULL || *list != NULL) { |
| 262 | ERR(ctx, "An empty list is needed to create lookup\n"); |
| 263 | return -ENOSYS; |
| 264 | } |
| 265 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 266 | /* Aliases from config file override all the others */ |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 267 | err = kmod_lookup_alias_from_config(ctx, alias, list); |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 268 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 269 | |
Lucas De Marchi | 64700e4 | 2011-12-01 15:57:53 -0200 | [diff] [blame] | 270 | err = kmod_lookup_alias_from_moddep_file(ctx, alias, list); |
| 271 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
| 272 | |
Lucas De Marchi | 9ba6f57 | 2011-11-30 20:31:45 -0200 | [diff] [blame] | 273 | err = kmod_lookup_alias_from_symbols_file(ctx, alias, list); |
| 274 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 275 | |
Lucas De Marchi | 49e61ca | 2011-12-01 16:27:04 -0200 | [diff] [blame] | 276 | err = kmod_lookup_alias_from_aliases_file(ctx, alias, list); |
| 277 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
| 278 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 279 | finish: |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 280 | |
| 281 | return err; |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 282 | fail: |
| 283 | kmod_module_unref_list(*list); |
| 284 | *list = NULL; |
Lucas De Marchi | 84f4220 | 2011-12-02 10:03:34 -0200 | [diff] [blame] | 285 | return err; |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 286 | } |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 287 | #undef CHECK_ERR_AND_FINISH |
| 288 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 289 | |
| 290 | KMOD_EXPORT int kmod_module_unref_list(struct kmod_list *list) |
| 291 | { |
| 292 | for (; list != NULL; list = kmod_list_remove(list)) |
| 293 | kmod_module_unref(list->data); |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 298 | KMOD_EXPORT struct kmod_list *kmod_module_get_dependencies(const struct kmod_module *mod) |
Lucas De Marchi | 0835fc3 | 2011-12-01 20:06:08 -0200 | [diff] [blame] | 299 | { |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 300 | struct kmod_list *l, *l_new, *list_new = NULL; |
| 301 | |
| 302 | if (mod == NULL) |
| 303 | return NULL; |
| 304 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 305 | if (!mod->init.dep) { |
| 306 | /* lazy init */ |
| 307 | char *line = kmod_search_moddep(mod->ctx, mod->name); |
| 308 | |
| 309 | if (line == NULL) |
| 310 | return NULL; |
| 311 | |
| 312 | kmod_module_parse_depline((struct kmod_module *)mod, line); |
| 313 | free(line); |
| 314 | |
| 315 | if (!mod->init.dep) |
| 316 | return NULL; |
| 317 | } |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 318 | |
| 319 | kmod_list_foreach(l, mod->dep) { |
| 320 | l_new = kmod_list_append(list_new, kmod_module_ref(l->data)); |
| 321 | if (l_new == NULL) { |
| 322 | kmod_module_unref(l->data); |
| 323 | goto fail; |
| 324 | } |
| 325 | |
| 326 | list_new = l_new; |
| 327 | } |
| 328 | |
| 329 | return list_new; |
| 330 | |
| 331 | fail: |
| 332 | ERR(mod->ctx, "out of memory\n"); |
| 333 | kmod_module_unref_list(list_new); |
| 334 | return NULL; |
Lucas De Marchi | 0835fc3 | 2011-12-01 20:06:08 -0200 | [diff] [blame] | 335 | } |
| 336 | |
Gustavo Sverzut Barbieri | ad4d1ae | 2011-12-04 13:14:11 -0200 | [diff] [blame] | 337 | KMOD_EXPORT struct kmod_module *kmod_module_get_module(const struct kmod_list *entry) |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 338 | { |
Gustavo Sverzut Barbieri | ad4d1ae | 2011-12-04 13:14:11 -0200 | [diff] [blame] | 339 | if (entry == NULL) |
| 340 | return NULL; |
| 341 | return kmod_module_ref(entry->data); |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 342 | } |
| 343 | |
Gustavo Sverzut Barbieri | 69f9dd4 | 2011-12-04 14:02:30 -0200 | [diff] [blame] | 344 | KMOD_EXPORT long kmod_module_get_size(const struct kmod_module *mod) |
| 345 | { |
| 346 | // FIXME TODO: this should be available from /sys/module/foo |
| 347 | FILE *fp; |
| 348 | char line[4096]; |
| 349 | int lineno = 0; |
| 350 | long size = -ENOENT; |
| 351 | |
| 352 | if (mod == NULL) |
| 353 | return -ENOENT; |
| 354 | |
| 355 | fp = fopen("/proc/modules", "r"); |
| 356 | if (fp == NULL) { |
| 357 | int err = -errno; |
| 358 | ERR(mod->ctx, |
| 359 | "could not open /proc/modules: %s\n", strerror(errno)); |
| 360 | return err; |
| 361 | } |
| 362 | |
| 363 | while (fgets(line, sizeof(line), fp)) { |
| 364 | char *saveptr, *endptr, *tok = strtok_r(line, " \t", &saveptr); |
| 365 | long value; |
| 366 | |
| 367 | lineno++; |
| 368 | if (tok == NULL || strcmp(tok, mod->name) != 0) |
| 369 | continue; |
| 370 | |
| 371 | tok = strtok_r(NULL, " \t", &saveptr); |
| 372 | if (tok == NULL) { |
| 373 | ERR(mod->ctx, |
| 374 | "invalid line format at /proc/modules:%d\n", lineno); |
| 375 | break; |
| 376 | } |
| 377 | |
| 378 | value = strtol(tok, &endptr, 10); |
| 379 | if (endptr == tok || *endptr != '\0') { |
| 380 | ERR(mod->ctx, |
| 381 | "invalid line format at /proc/modules:%d\n", lineno); |
| 382 | break; |
| 383 | } |
| 384 | |
| 385 | size = value; |
| 386 | break; |
| 387 | } |
| 388 | fclose(fp); |
| 389 | return size; |
| 390 | } |
| 391 | |
Gustavo Sverzut Barbieri | 1ce08a5 | 2011-12-02 20:24:07 -0200 | [diff] [blame] | 392 | KMOD_EXPORT const char *kmod_module_get_name(const struct kmod_module *mod) |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 393 | { |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 394 | return mod->name; |
| 395 | } |
| 396 | |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 397 | /* |
| 398 | * Relative paths are relative to dirname. Absolute paths are only used when |
| 399 | * user created kmod_module by giving a path |
| 400 | */ |
Gustavo Sverzut Barbieri | 1ce08a5 | 2011-12-02 20:24:07 -0200 | [diff] [blame] | 401 | KMOD_EXPORT const char *kmod_module_get_path(const struct kmod_module *mod) |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 402 | { |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 403 | if (!mod->init.dep) { |
| 404 | /* lazy init */ |
| 405 | char *line = kmod_search_moddep(mod->ctx, mod->name); |
| 406 | |
| 407 | if (line == NULL) |
| 408 | return NULL; |
| 409 | |
| 410 | kmod_module_parse_depline((struct kmod_module *) mod, line); |
| 411 | free(line); |
| 412 | |
| 413 | if (!mod->init.dep) |
| 414 | return NULL; |
| 415 | } |
| 416 | |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 417 | return mod->path; |
| 418 | } |
| 419 | |
| 420 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 421 | extern long delete_module(const char *name, unsigned int flags); |
| 422 | |
| 423 | KMOD_EXPORT int kmod_module_remove_module(struct kmod_module *mod, |
| 424 | unsigned int flags) |
| 425 | { |
| 426 | int err; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 427 | |
| 428 | if (mod == NULL) |
| 429 | return -ENOENT; |
| 430 | |
| 431 | /* Filter out other flags */ |
| 432 | flags &= (KMOD_REMOVE_FORCE | KMOD_REMOVE_NOWAIT); |
| 433 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 434 | err = delete_module(mod->name, flags); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 435 | if (err != 0) { |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 436 | ERR(mod->ctx, "Removing '%s': %s\n", mod->name, |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 437 | strerror(-err)); |
| 438 | return err; |
| 439 | } |
| 440 | |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | extern long init_module(void *mem, unsigned long len, const char *args); |
| 445 | |
| 446 | KMOD_EXPORT int kmod_module_insert_module(struct kmod_module *mod, |
| 447 | unsigned int flags) |
| 448 | { |
| 449 | int err; |
| 450 | void *mmaped_file; |
| 451 | struct stat st; |
| 452 | int fd; |
| 453 | const char *args = ""; |
| 454 | |
| 455 | if (mod == NULL) |
| 456 | return -ENOENT; |
| 457 | |
| 458 | if (mod->path == NULL) { |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 459 | ERR(mod->ctx, "Not supported to load a module by name yet\n"); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 460 | return -ENOSYS; |
| 461 | } |
| 462 | |
| 463 | if (flags != 0) |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 464 | INFO(mod->ctx, "Flags are not implemented yet\n"); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 465 | |
| 466 | if ((fd = open(mod->path, O_RDONLY)) < 0) { |
| 467 | err = -errno; |
| 468 | return err; |
| 469 | } |
| 470 | |
Lucas De Marchi | b418a82 | 2011-12-01 23:13:27 -0200 | [diff] [blame] | 471 | fstat(fd, &st); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 472 | |
| 473 | if ((mmaped_file = mmap(0, st.st_size, PROT_READ, |
| 474 | MAP_PRIVATE, fd, 0)) == MAP_FAILED) { |
| 475 | close(fd); |
| 476 | return -errno; |
| 477 | } |
| 478 | |
| 479 | err = init_module(mmaped_file, st.st_size, args); |
| 480 | if (err < 0) |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 481 | ERR(mod->ctx, "Failed to insert module '%s'\n", mod->path); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 482 | |
| 483 | munmap(mmaped_file, st.st_size); |
| 484 | close(fd); |
| 485 | |
| 486 | return err; |
| 487 | } |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 488 | |
| 489 | KMOD_EXPORT const char *kmod_module_initstate_str(enum kmod_module_initstate state) |
| 490 | { |
| 491 | switch (state) { |
| 492 | case KMOD_MODULE_BUILTIN: |
| 493 | return "builtin"; |
| 494 | case KMOD_MODULE_LIVE: |
| 495 | return "live"; |
| 496 | case KMOD_MODULE_COMING: |
| 497 | return "coming"; |
| 498 | case KMOD_MODULE_GOING: |
| 499 | return "going"; |
| 500 | default: |
| 501 | return NULL; |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | KMOD_EXPORT int kmod_module_get_initstate(const struct kmod_module *mod) |
| 506 | { |
| 507 | char path[PATH_MAX], buf[32]; |
| 508 | int fd, err, pathlen; |
| 509 | |
| 510 | pathlen = snprintf(path, sizeof(path), |
| 511 | "/sys/module/%s/initstate", mod->name); |
| 512 | fd = open(path, O_RDONLY); |
| 513 | if (fd < 0) { |
| 514 | err = -errno; |
| 515 | |
| 516 | if (pathlen > (int)sizeof("/initstate") - 1) { |
| 517 | struct stat st; |
| 518 | path[pathlen - (sizeof("/initstate") - 1)] = '\0'; |
| 519 | if (stat(path, &st) == 0 && S_ISDIR(st.st_mode)) |
| 520 | return KMOD_MODULE_BUILTIN; |
| 521 | } |
| 522 | |
| 523 | ERR(mod->ctx, "could not open '%s': %s\n", |
| 524 | path, strerror(-err)); |
| 525 | return err; |
| 526 | } |
| 527 | |
| 528 | err = read_str_safe(fd, buf, sizeof(buf)); |
| 529 | close(fd); |
| 530 | if (err < 0) { |
| 531 | ERR(mod->ctx, "could not read from '%s': %s\n", |
| 532 | path, strerror(-err)); |
| 533 | return err; |
| 534 | } |
| 535 | |
| 536 | if (strcmp(buf, "live\n") == 0) |
| 537 | return KMOD_MODULE_LIVE; |
| 538 | else if (strcmp(buf, "coming\n") == 0) |
| 539 | return KMOD_MODULE_COMING; |
| 540 | else if (strcmp(buf, "going\n") == 0) |
| 541 | return KMOD_MODULE_GOING; |
| 542 | |
| 543 | ERR(mod->ctx, "unknown %s: '%s'\n", path, buf); |
| 544 | return -EINVAL; |
| 545 | } |
| 546 | |
| 547 | KMOD_EXPORT int kmod_module_get_refcnt(const struct kmod_module *mod) |
| 548 | { |
| 549 | char path[PATH_MAX]; |
| 550 | long refcnt; |
| 551 | int fd, err; |
| 552 | |
| 553 | snprintf(path, sizeof(path), "/sys/module/%s/refcnt", mod->name); |
| 554 | fd = open(path, O_RDONLY); |
| 555 | if (fd < 0) { |
| 556 | err = -errno; |
| 557 | ERR(mod->ctx, "could not open '%s': %s\n", |
| 558 | path, strerror(errno)); |
| 559 | return err; |
| 560 | } |
| 561 | |
| 562 | err = read_str_long(fd, &refcnt, 10); |
| 563 | close(fd); |
| 564 | if (err < 0) { |
| 565 | ERR(mod->ctx, "could not read integer from '%s': '%s'\n", |
| 566 | path, strerror(-err)); |
| 567 | return err; |
| 568 | } |
| 569 | |
| 570 | return (int)refcnt; |
| 571 | } |
| 572 | |
| 573 | KMOD_EXPORT struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod) |
| 574 | { |
| 575 | char dname[PATH_MAX]; |
| 576 | struct kmod_list *list = NULL; |
| 577 | DIR *d; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 578 | |
| 579 | if (mod == NULL) |
| 580 | return NULL; |
| 581 | snprintf(dname, sizeof(dname), "/sys/module/%s/holders", mod->name); |
| 582 | |
| 583 | d = opendir(dname); |
| 584 | if (d == NULL) { |
| 585 | ERR(mod->ctx, "could not open '%s': %s\n", |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 586 | dname, strerror(errno)); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 587 | return NULL; |
| 588 | } |
| 589 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 590 | for (;;) { |
| 591 | struct dirent de, *entp; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 592 | struct kmod_module *holder; |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 593 | struct kmod_list *l; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 594 | int err; |
| 595 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 596 | err = readdir_r(d, &de, &entp); |
| 597 | if (err != 0) { |
| 598 | ERR(mod->ctx, "could not iterate for module '%s': %s\n", |
| 599 | mod->name, strerror(-err)); |
| 600 | goto fail; |
| 601 | } |
| 602 | |
| 603 | if (entp == NULL) |
| 604 | break; |
| 605 | |
| 606 | if (de.d_name[0] == '.') { |
| 607 | if (de.d_name[1] == '\0' || |
| 608 | (de.d_name[1] == '.' && de.d_name[2] == '\0')) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 609 | continue; |
| 610 | } |
| 611 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 612 | err = kmod_module_new_from_name(mod->ctx, de.d_name, &holder); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 613 | if (err < 0) { |
| 614 | ERR(mod->ctx, "could not create module for '%s': %s\n", |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 615 | de.d_name, strerror(-err)); |
| 616 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 617 | } |
| 618 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 619 | l = kmod_list_append(list, holder); |
| 620 | if (l != NULL) { |
| 621 | list = l; |
| 622 | } else { |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 623 | ERR(mod->ctx, "out of memory\n"); |
| 624 | kmod_module_unref(holder); |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 625 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 626 | } |
| 627 | } |
| 628 | |
| 629 | closedir(d); |
| 630 | return list; |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 631 | |
| 632 | fail: |
| 633 | closedir(d); |
| 634 | kmod_module_unref_list(list); |
| 635 | return NULL; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | struct kmod_module_section { |
| 639 | unsigned long address; |
| 640 | char name[]; |
| 641 | }; |
| 642 | |
| 643 | static void kmod_module_section_free(struct kmod_module_section *section) |
| 644 | { |
| 645 | free(section); |
| 646 | } |
| 647 | |
| 648 | KMOD_EXPORT struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod) |
| 649 | { |
| 650 | char dname[PATH_MAX]; |
| 651 | struct kmod_list *list = NULL; |
| 652 | DIR *d; |
| 653 | int dfd; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 654 | |
| 655 | if (mod == NULL) |
| 656 | return NULL; |
| 657 | snprintf(dname, sizeof(dname), "/sys/module/%s/sections", mod->name); |
| 658 | |
| 659 | d = opendir(dname); |
| 660 | if (d == NULL) { |
| 661 | ERR(mod->ctx, "could not open '%s': %s\n", |
| 662 | dname, strerror(errno)); |
| 663 | return NULL; |
| 664 | } |
| 665 | |
| 666 | dfd = dirfd(d); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 667 | |
| 668 | for (;;) { |
| 669 | struct dirent de, *entp; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 670 | struct kmod_module_section *section; |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 671 | struct kmod_list *l; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 672 | unsigned long address; |
| 673 | size_t namesz; |
| 674 | int fd, err; |
| 675 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 676 | err = readdir_r(d, &de, &entp); |
| 677 | if (err != 0) { |
| 678 | ERR(mod->ctx, "could not iterate for module '%s': %s\n", |
| 679 | mod->name, strerror(-err)); |
| 680 | goto fail; |
| 681 | } |
| 682 | |
| 683 | if (de.d_name[0] == '.') { |
| 684 | if (de.d_name[1] == '\0' || |
| 685 | (de.d_name[1] == '.' && de.d_name[2] == '\0')) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 686 | continue; |
| 687 | } |
| 688 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 689 | fd = openat(dfd, de.d_name, O_RDONLY); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 690 | if (fd < 0) { |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 691 | ERR(mod->ctx, "could not open '%s/%s': %m\n", |
| 692 | dname, de.d_name); |
| 693 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | err = read_str_ulong(fd, &address, 16); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 697 | close(fd); |
| 698 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 699 | if (err < 0) { |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 700 | ERR(mod->ctx, "could not read long from '%s/%s': %m\n", |
| 701 | dname, de.d_name); |
| 702 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 703 | } |
| 704 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 705 | namesz = strlen(de.d_name) + 1; |
| 706 | section = malloc(sizeof(*section) + namesz); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 707 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 708 | if (section == NULL) { |
| 709 | ERR(mod->ctx, "out of memory\n"); |
| 710 | goto fail; |
| 711 | } |
| 712 | |
| 713 | section->address = address; |
| 714 | memcpy(section->name, de.d_name, namesz); |
| 715 | |
| 716 | l = kmod_list_append(list, section); |
| 717 | if (l != NULL) { |
| 718 | list = l; |
| 719 | } else { |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 720 | ERR(mod->ctx, "out of memory\n"); |
| 721 | free(section); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 722 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 723 | } |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | closedir(d); |
| 727 | return list; |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 728 | |
| 729 | fail: |
| 730 | closedir(d); |
| 731 | kmod_module_unref_list(list); |
| 732 | return NULL; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | KMOD_EXPORT const char *kmod_module_section_get_name(const struct kmod_list *entry) |
| 736 | { |
| 737 | struct kmod_module_section *section; |
| 738 | if (entry == NULL) |
| 739 | return NULL; |
| 740 | section = entry->data; |
| 741 | return section->name; |
| 742 | } |
| 743 | |
| 744 | KMOD_EXPORT unsigned long kmod_module_section_get_address(const struct kmod_list *entry) |
| 745 | { |
| 746 | struct kmod_module_section *section; |
| 747 | if (entry == NULL) |
| 748 | return (unsigned long)-1; |
| 749 | section = entry->data; |
| 750 | return section->address; |
| 751 | } |
| 752 | |
| 753 | KMOD_EXPORT void kmod_module_section_free_list(struct kmod_list *list) |
| 754 | { |
| 755 | while (list) { |
| 756 | kmod_module_section_free(list->data); |
| 757 | list = kmod_list_remove(list); |
| 758 | } |
| 759 | } |