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 |
Lucas De Marchi | cb451f3 | 2011-12-12 18:24:35 -0200 | [diff] [blame] | 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 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 | */ |
| 20 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 21 | #include <assert.h> |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stddef.h> |
| 25 | #include <stdarg.h> |
| 26 | #include <unistd.h> |
| 27 | #include <errno.h> |
| 28 | #include <string.h> |
| 29 | #include <ctype.h> |
| 30 | #include <inttypes.h> |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 31 | #include <limits.h> |
| 32 | #include <dirent.h> |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 33 | #include <sys/stat.h> |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/mman.h> |
| 36 | #include <string.h> |
| 37 | |
| 38 | #include "libkmod.h" |
| 39 | #include "libkmod-private.h" |
| 40 | |
| 41 | /** |
| 42 | * kmod_module: |
| 43 | * |
| 44 | * Opaque object representing a module. |
| 45 | */ |
| 46 | struct kmod_module { |
| 47 | struct kmod_ctx *ctx; |
Lucas De Marchi | 219f9c3 | 2011-12-13 13:07:40 -0200 | [diff] [blame] | 48 | char *name; |
Gustavo Sverzut Barbieri | f1fb6f8 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 49 | char *path; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 50 | struct kmod_list *dep; |
Gustavo Sverzut Barbieri | bd3f553 | 2011-12-10 20:47:01 -0200 | [diff] [blame] | 51 | char *options; |
| 52 | char *install_commands; |
| 53 | char *remove_commands; |
Lucas De Marchi | 6ad5f26 | 2011-12-13 14:12:50 -0200 | [diff] [blame^] | 54 | char *alias; /* only set if this module was created from an alias */ |
Gustavo Sverzut Barbieri | b6a534f | 2011-12-10 20:36:22 -0200 | [diff] [blame] | 55 | int n_dep; |
Gustavo Sverzut Barbieri | bd3f553 | 2011-12-10 20:47:01 -0200 | [diff] [blame] | 56 | int refcount; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 57 | struct { |
| 58 | bool dep : 1; |
Gustavo Sverzut Barbieri | bd3f553 | 2011-12-10 20:47:01 -0200 | [diff] [blame] | 59 | bool options : 1; |
| 60 | bool install_commands : 1; |
| 61 | bool remove_commands : 1; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 62 | } init; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 63 | }; |
| 64 | |
Gustavo Sverzut Barbieri | d917f27 | 2011-12-10 21:00:19 -0200 | [diff] [blame] | 65 | inline char *modname_normalize(const char *modname, char buf[NAME_MAX], |
Lucas De Marchi | 6c343b1 | 2011-12-06 09:01:01 -0200 | [diff] [blame] | 66 | size_t *len) |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 67 | { |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 68 | size_t s; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 69 | |
Gustavo Sverzut Barbieri | e1a6b30 | 2011-12-08 04:10:49 -0200 | [diff] [blame] | 70 | for (s = 0; s < NAME_MAX - 1; s++) { |
| 71 | const char c = modname[s]; |
| 72 | if (c == '-') |
| 73 | buf[s] = '_'; |
| 74 | else if (c == '\0' || c == '.') |
| 75 | break; |
| 76 | else |
| 77 | buf[s] = c; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 78 | } |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 79 | |
Gustavo Sverzut Barbieri | e1a6b30 | 2011-12-08 04:10:49 -0200 | [diff] [blame] | 80 | buf[s] = '\0'; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 81 | |
| 82 | if (len) |
| 83 | *len = s; |
| 84 | |
Gustavo Sverzut Barbieri | e1a6b30 | 2011-12-08 04:10:49 -0200 | [diff] [blame] | 85 | return buf; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 86 | } |
| 87 | |
Lucas De Marchi | 6c343b1 | 2011-12-06 09:01:01 -0200 | [diff] [blame] | 88 | static char *path_to_modname(const char *path, char buf[NAME_MAX], size_t *len) |
| 89 | { |
| 90 | char *modname; |
| 91 | |
| 92 | modname = basename(path); |
| 93 | if (modname == NULL || modname[0] == '\0') |
| 94 | return NULL; |
| 95 | |
| 96 | return modname_normalize(modname, buf, len); |
| 97 | } |
| 98 | |
Lucas De Marchi | c35347f | 2011-12-12 10:48:02 -0200 | [diff] [blame] | 99 | static inline const char *path_join(const char *path, size_t prefixlen, |
| 100 | char buf[PATH_MAX]) |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 101 | { |
| 102 | size_t pathlen; |
| 103 | |
| 104 | if (path[0] == '/') |
| 105 | return path; |
| 106 | |
| 107 | pathlen = strlen(path); |
| 108 | if (prefixlen + pathlen + 1 >= PATH_MAX) |
| 109 | return NULL; |
| 110 | |
| 111 | memcpy(buf + prefixlen, path, pathlen + 1); |
| 112 | return buf; |
| 113 | } |
| 114 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 115 | int kmod_module_parse_depline(struct kmod_module *mod, char *line) |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 116 | { |
| 117 | struct kmod_ctx *ctx = mod->ctx; |
| 118 | struct kmod_list *list = NULL; |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 119 | const char *dirname; |
| 120 | char buf[PATH_MAX]; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 121 | char *p, *saveptr; |
Lucas De Marchi | 45f2778 | 2011-12-12 17:23:04 -0200 | [diff] [blame] | 122 | int err = 0, n = 0; |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 123 | size_t dirnamelen; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 124 | |
Gustavo Sverzut Barbieri | b6a534f | 2011-12-10 20:36:22 -0200 | [diff] [blame] | 125 | if (mod->init.dep) |
| 126 | return mod->n_dep; |
| 127 | assert(mod->dep == NULL); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 128 | mod->init.dep = true; |
| 129 | |
| 130 | p = strchr(line, ':'); |
| 131 | if (p == NULL) |
| 132 | return 0; |
| 133 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 134 | *p = '\0'; |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 135 | dirname = kmod_get_dirname(mod->ctx); |
| 136 | dirnamelen = strlen(dirname); |
| 137 | if (dirnamelen + 2 >= PATH_MAX) |
| 138 | return 0; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 139 | |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 140 | memcpy(buf, dirname, dirnamelen); |
| 141 | buf[dirnamelen] = '/'; |
| 142 | dirnamelen++; |
| 143 | buf[dirnamelen] = '\0'; |
| 144 | |
| 145 | if (mod->path == NULL) { |
| 146 | const char *str = path_join(line, dirnamelen, buf); |
| 147 | if (str == NULL) |
| 148 | return 0; |
| 149 | mod->path = strdup(str); |
| 150 | if (mod->path == NULL) |
| 151 | return 0; |
| 152 | } |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 153 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 154 | p++; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 155 | for (p = strtok_r(p, " \t", &saveptr); p != NULL; |
| 156 | p = strtok_r(NULL, " \t", &saveptr)) { |
Lucas De Marchi | 1fc1c9a | 2011-12-02 10:00:03 -0200 | [diff] [blame] | 157 | struct kmod_module *depmod; |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 158 | const char *path; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 159 | |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 160 | path = path_join(p, dirnamelen, buf); |
| 161 | if (path == NULL) { |
| 162 | ERR(ctx, "could not join path '%s' and '%s'.\n", |
| 163 | dirname, p); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 164 | goto fail; |
| 165 | } |
| 166 | |
Gustavo Sverzut Barbieri | e18ad35 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 167 | err = kmod_module_new_from_path(ctx, path, &depmod); |
| 168 | if (err < 0) { |
| 169 | ERR(ctx, "ctx=%p path=%s error=%s\n", |
| 170 | ctx, path, strerror(-err)); |
| 171 | goto fail; |
| 172 | } |
| 173 | |
| 174 | DBG(ctx, "add dep: %s\n", path); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 175 | |
Lucas De Marchi | 1fc1c9a | 2011-12-02 10:00:03 -0200 | [diff] [blame] | 176 | list = kmod_list_append(list, depmod); |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 177 | n++; |
| 178 | } |
| 179 | |
| 180 | DBG(ctx, "%d dependencies for %s\n", n, mod->name); |
| 181 | |
| 182 | mod->dep = list; |
Gustavo Sverzut Barbieri | b6a534f | 2011-12-10 20:36:22 -0200 | [diff] [blame] | 183 | mod->n_dep = n; |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 184 | return n; |
| 185 | |
| 186 | fail: |
| 187 | kmod_module_unref_list(list); |
| 188 | mod->init.dep = false; |
| 189 | return err; |
| 190 | } |
| 191 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 192 | KMOD_EXPORT int kmod_module_new_from_name(struct kmod_ctx *ctx, |
| 193 | const char *name, |
| 194 | struct kmod_module **mod) |
| 195 | { |
| 196 | struct kmod_module *m; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 197 | size_t namelen; |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 198 | char name_norm[NAME_MAX]; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 199 | |
| 200 | if (ctx == NULL || name == NULL) |
| 201 | return -ENOENT; |
| 202 | |
Lucas De Marchi | 6ad5f26 | 2011-12-13 14:12:50 -0200 | [diff] [blame^] | 203 | alias_normalize(name, name_norm, &namelen); |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 204 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 205 | m = kmod_pool_get_module(ctx, name_norm); |
| 206 | if (m != NULL) { |
| 207 | *mod = kmod_module_ref(m); |
| 208 | return 0; |
| 209 | } |
| 210 | |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 211 | m = calloc(1, sizeof(*m) + namelen + 1); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 212 | if (m == NULL) { |
| 213 | free(m); |
| 214 | return -ENOMEM; |
| 215 | } |
| 216 | |
| 217 | m->ctx = kmod_ref(ctx); |
Lucas De Marchi | 219f9c3 | 2011-12-13 13:07:40 -0200 | [diff] [blame] | 218 | m->name = (char *)m + sizeof(*m); |
Lucas De Marchi | 4f2bb7c | 2011-12-06 02:46:22 -0200 | [diff] [blame] | 219 | memcpy(m->name, name_norm, namelen + 1); |
Gustavo Sverzut Barbieri | 87ca03b | 2011-12-04 12:34:02 -0200 | [diff] [blame] | 220 | m->refcount = 1; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 221 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 222 | kmod_pool_add_module(ctx, m); |
| 223 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 224 | *mod = m; |
| 225 | |
| 226 | return 0; |
| 227 | } |
| 228 | |
Lucas De Marchi | 6ad5f26 | 2011-12-13 14:12:50 -0200 | [diff] [blame^] | 229 | int kmod_module_new_from_alias(struct kmod_ctx *ctx, const char *alias, |
| 230 | const char *name, struct kmod_module **mod) |
| 231 | { |
| 232 | int err; |
| 233 | struct kmod_module *m; |
| 234 | |
| 235 | err = kmod_module_new_from_name(ctx, alias, mod); |
| 236 | if (err < 0) |
| 237 | return err; |
| 238 | |
| 239 | m = *mod; |
| 240 | |
| 241 | /* if module did not came from pool */ |
| 242 | if (m->alias == NULL) { |
| 243 | m->alias = m->name; |
| 244 | m->name = strdup(name); |
| 245 | if (m->name == NULL) |
| 246 | goto fail_oom; |
| 247 | } |
| 248 | |
| 249 | return 0; |
| 250 | |
| 251 | fail_oom: |
| 252 | ERR(ctx, "out of memory\n"); |
| 253 | kmod_module_unref(m); |
| 254 | *mod = NULL; |
| 255 | return err; |
| 256 | } |
| 257 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 258 | KMOD_EXPORT int kmod_module_new_from_path(struct kmod_ctx *ctx, |
| 259 | const char *path, |
| 260 | struct kmod_module **mod) |
| 261 | { |
| 262 | struct kmod_module *m; |
| 263 | int err; |
| 264 | struct stat st; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 265 | char name[NAME_MAX]; |
Lucas De Marchi | 71e975c | 2011-12-07 13:53:53 -0200 | [diff] [blame] | 266 | char *abspath; |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 267 | size_t namelen; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 268 | |
| 269 | if (ctx == NULL || path == NULL) |
| 270 | return -ENOENT; |
| 271 | |
Lucas De Marchi | 71e975c | 2011-12-07 13:53:53 -0200 | [diff] [blame] | 272 | abspath = path_make_absolute_cwd(path); |
| 273 | if (abspath == NULL) |
| 274 | return -ENOMEM; |
| 275 | |
| 276 | err = stat(abspath, &st); |
| 277 | if (err < 0) { |
| 278 | free(abspath); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 279 | return -errno; |
Lucas De Marchi | 71e975c | 2011-12-07 13:53:53 -0200 | [diff] [blame] | 280 | } |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 281 | |
Gustavo Sverzut Barbieri | 973c80b | 2011-12-12 18:28:52 -0200 | [diff] [blame] | 282 | if (path_to_modname(path, name, &namelen) == NULL) { |
| 283 | free(abspath); |
| 284 | return -ENOENT; |
| 285 | } |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 286 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 287 | m = kmod_pool_get_module(ctx, name); |
| 288 | if (m != NULL) { |
Lucas De Marchi | 6bd0b8d | 2011-12-07 14:08:01 -0200 | [diff] [blame] | 289 | if (m->path == NULL) |
| 290 | m->path = abspath; |
| 291 | else if (streq(m->path, abspath)) |
| 292 | free(abspath); |
| 293 | else { |
| 294 | ERR(ctx, "kmod_module '%s' already exists with different path\n", |
| 295 | name); |
| 296 | free(abspath); |
| 297 | return -EEXIST; |
| 298 | } |
| 299 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 300 | *mod = kmod_module_ref(m); |
| 301 | return 0; |
| 302 | } |
| 303 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 304 | m = calloc(1, sizeof(*m) + namelen + 1); |
| 305 | if (m == NULL) |
| 306 | return -errno; |
| 307 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 308 | m->ctx = kmod_ref(ctx); |
Lucas De Marchi | 219f9c3 | 2011-12-13 13:07:40 -0200 | [diff] [blame] | 309 | m->name = (char *)m + sizeof(*m); |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 310 | memcpy(m->name, name, namelen); |
Lucas De Marchi | 71e975c | 2011-12-07 13:53:53 -0200 | [diff] [blame] | 311 | m->path = abspath; |
Gustavo Sverzut Barbieri | 87ca03b | 2011-12-04 12:34:02 -0200 | [diff] [blame] | 312 | m->refcount = 1; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 313 | |
Lucas De Marchi | fd186ae | 2011-12-06 03:38:37 -0200 | [diff] [blame] | 314 | kmod_pool_add_module(ctx, m); |
| 315 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 316 | *mod = m; |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | KMOD_EXPORT struct kmod_module *kmod_module_unref(struct kmod_module *mod) |
| 322 | { |
| 323 | if (mod == NULL) |
| 324 | return NULL; |
| 325 | |
| 326 | if (--mod->refcount > 0) |
| 327 | return mod; |
| 328 | |
| 329 | DBG(mod->ctx, "kmod_module %p released\n", mod); |
| 330 | |
Lucas De Marchi | 7636e72 | 2011-12-01 17:56:03 -0200 | [diff] [blame] | 331 | kmod_module_unref_list(mod->dep); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 332 | kmod_unref(mod->ctx); |
Gustavo Sverzut Barbieri | bd3f553 | 2011-12-10 20:47:01 -0200 | [diff] [blame] | 333 | free(mod->options); |
| 334 | free(mod->install_commands); |
| 335 | free(mod->remove_commands); |
Gustavo Sverzut Barbieri | f1fb6f8 | 2011-12-08 04:44:03 -0200 | [diff] [blame] | 336 | free(mod->path); |
Lucas De Marchi | 6ad5f26 | 2011-12-13 14:12:50 -0200 | [diff] [blame^] | 337 | if (mod->alias != NULL) |
| 338 | free(mod->name); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 339 | free(mod); |
| 340 | return NULL; |
| 341 | } |
| 342 | |
| 343 | KMOD_EXPORT struct kmod_module *kmod_module_ref(struct kmod_module *mod) |
| 344 | { |
| 345 | if (mod == NULL) |
| 346 | return NULL; |
| 347 | |
| 348 | mod->refcount++; |
| 349 | |
| 350 | return mod; |
| 351 | } |
| 352 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 353 | #define CHECK_ERR_AND_FINISH(_err, _label_err, _list, label_finish) \ |
| 354 | do { \ |
| 355 | if ((_err) < 0) \ |
| 356 | goto _label_err; \ |
| 357 | if (*(_list) != NULL) \ |
| 358 | goto finish; \ |
| 359 | } while (0) |
| 360 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 361 | KMOD_EXPORT int kmod_module_new_from_lookup(struct kmod_ctx *ctx, |
Gustavo Sverzut Barbieri | d917f27 | 2011-12-10 21:00:19 -0200 | [diff] [blame] | 362 | const char *given_alias, |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 363 | struct kmod_list **list) |
| 364 | { |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 365 | int err; |
Gustavo Sverzut Barbieri | d917f27 | 2011-12-10 21:00:19 -0200 | [diff] [blame] | 366 | char alias[NAME_MAX]; |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 367 | |
Lucas De Marchi | 4308b17 | 2011-12-13 10:26:04 -0200 | [diff] [blame] | 368 | if (ctx == NULL || given_alias == NULL) |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 369 | return -ENOENT; |
| 370 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 371 | if (list == NULL || *list != NULL) { |
| 372 | ERR(ctx, "An empty list is needed to create lookup\n"); |
| 373 | return -ENOSYS; |
| 374 | } |
| 375 | |
Lucas De Marchi | d470db1 | 2011-12-13 10:28:00 -0200 | [diff] [blame] | 376 | if (alias_normalize(given_alias, alias, NULL) < 0) |
| 377 | return -EINVAL; |
Gustavo Sverzut Barbieri | d917f27 | 2011-12-10 21:00:19 -0200 | [diff] [blame] | 378 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 379 | /* Aliases from config file override all the others */ |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 380 | err = kmod_lookup_alias_from_config(ctx, alias, list); |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 381 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 382 | |
Lucas De Marchi | 64700e4 | 2011-12-01 15:57:53 -0200 | [diff] [blame] | 383 | err = kmod_lookup_alias_from_moddep_file(ctx, alias, list); |
| 384 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
| 385 | |
Lucas De Marchi | 9ba6f57 | 2011-11-30 20:31:45 -0200 | [diff] [blame] | 386 | err = kmod_lookup_alias_from_symbols_file(ctx, alias, list); |
| 387 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 388 | |
Lucas De Marchi | 49e61ca | 2011-12-01 16:27:04 -0200 | [diff] [blame] | 389 | err = kmod_lookup_alias_from_aliases_file(ctx, alias, list); |
| 390 | CHECK_ERR_AND_FINISH(err, fail, list, finish); |
| 391 | |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 392 | finish: |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 393 | |
| 394 | return err; |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 395 | fail: |
| 396 | kmod_module_unref_list(*list); |
| 397 | *list = NULL; |
Lucas De Marchi | 84f4220 | 2011-12-02 10:03:34 -0200 | [diff] [blame] | 398 | return err; |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 399 | } |
Lucas De Marchi | b14dcfd | 2011-11-30 20:29:51 -0200 | [diff] [blame] | 400 | #undef CHECK_ERR_AND_FINISH |
| 401 | |
Lucas De Marchi | 7f3eb0c | 2011-11-30 19:03:41 -0200 | [diff] [blame] | 402 | |
| 403 | KMOD_EXPORT int kmod_module_unref_list(struct kmod_list *list) |
| 404 | { |
| 405 | for (; list != NULL; list = kmod_list_remove(list)) |
| 406 | kmod_module_unref(list->data); |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 411 | 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] | 412 | { |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 413 | struct kmod_list *l, *l_new, *list_new = NULL; |
| 414 | |
| 415 | if (mod == NULL) |
| 416 | return NULL; |
| 417 | |
Lucas De Marchi | 671d489 | 2011-12-05 20:23:05 -0200 | [diff] [blame] | 418 | if (!mod->init.dep) { |
| 419 | /* lazy init */ |
| 420 | char *line = kmod_search_moddep(mod->ctx, mod->name); |
| 421 | |
| 422 | if (line == NULL) |
| 423 | return NULL; |
| 424 | |
| 425 | kmod_module_parse_depline((struct kmod_module *)mod, line); |
| 426 | free(line); |
| 427 | |
| 428 | if (!mod->init.dep) |
| 429 | return NULL; |
| 430 | } |
Lucas De Marchi | f1cd799 | 2011-12-05 19:40:45 -0200 | [diff] [blame] | 431 | |
| 432 | kmod_list_foreach(l, mod->dep) { |
| 433 | l_new = kmod_list_append(list_new, kmod_module_ref(l->data)); |
| 434 | if (l_new == NULL) { |
| 435 | kmod_module_unref(l->data); |
| 436 | goto fail; |
| 437 | } |
| 438 | |
| 439 | list_new = l_new; |
| 440 | } |
| 441 | |
| 442 | return list_new; |
| 443 | |
| 444 | fail: |
| 445 | ERR(mod->ctx, "out of memory\n"); |
| 446 | kmod_module_unref_list(list_new); |
| 447 | return NULL; |
Lucas De Marchi | 0835fc3 | 2011-12-01 20:06:08 -0200 | [diff] [blame] | 448 | } |
| 449 | |
Gustavo Sverzut Barbieri | ad4d1ae | 2011-12-04 13:14:11 -0200 | [diff] [blame] | 450 | 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] | 451 | { |
Gustavo Sverzut Barbieri | ad4d1ae | 2011-12-04 13:14:11 -0200 | [diff] [blame] | 452 | if (entry == NULL) |
| 453 | return NULL; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 454 | |
Gustavo Sverzut Barbieri | ad4d1ae | 2011-12-04 13:14:11 -0200 | [diff] [blame] | 455 | return kmod_module_ref(entry->data); |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 456 | } |
| 457 | |
Gustavo Sverzut Barbieri | 69f9dd4 | 2011-12-04 14:02:30 -0200 | [diff] [blame] | 458 | KMOD_EXPORT long kmod_module_get_size(const struct kmod_module *mod) |
| 459 | { |
| 460 | // FIXME TODO: this should be available from /sys/module/foo |
| 461 | FILE *fp; |
| 462 | char line[4096]; |
| 463 | int lineno = 0; |
| 464 | long size = -ENOENT; |
| 465 | |
| 466 | if (mod == NULL) |
| 467 | return -ENOENT; |
| 468 | |
| 469 | fp = fopen("/proc/modules", "r"); |
| 470 | if (fp == NULL) { |
| 471 | int err = -errno; |
| 472 | ERR(mod->ctx, |
| 473 | "could not open /proc/modules: %s\n", strerror(errno)); |
| 474 | return err; |
| 475 | } |
| 476 | |
| 477 | while (fgets(line, sizeof(line), fp)) { |
| 478 | char *saveptr, *endptr, *tok = strtok_r(line, " \t", &saveptr); |
| 479 | long value; |
| 480 | |
| 481 | lineno++; |
Lucas De Marchi | 877e80c | 2011-12-07 02:26:31 -0200 | [diff] [blame] | 482 | if (tok == NULL || !streq(tok, mod->name)) |
Gustavo Sverzut Barbieri | 69f9dd4 | 2011-12-04 14:02:30 -0200 | [diff] [blame] | 483 | continue; |
| 484 | |
| 485 | tok = strtok_r(NULL, " \t", &saveptr); |
| 486 | if (tok == NULL) { |
| 487 | ERR(mod->ctx, |
| 488 | "invalid line format at /proc/modules:%d\n", lineno); |
| 489 | break; |
| 490 | } |
| 491 | |
| 492 | value = strtol(tok, &endptr, 10); |
| 493 | if (endptr == tok || *endptr != '\0') { |
| 494 | ERR(mod->ctx, |
| 495 | "invalid line format at /proc/modules:%d\n", lineno); |
| 496 | break; |
| 497 | } |
| 498 | |
| 499 | size = value; |
| 500 | break; |
| 501 | } |
| 502 | fclose(fp); |
| 503 | return size; |
| 504 | } |
| 505 | |
Gustavo Sverzut Barbieri | 1ce08a5 | 2011-12-02 20:24:07 -0200 | [diff] [blame] | 506 | 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] | 507 | { |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 508 | return mod->name; |
| 509 | } |
| 510 | |
Gustavo Sverzut Barbieri | 1ce08a5 | 2011-12-02 20:24:07 -0200 | [diff] [blame] | 511 | 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] | 512 | { |
Lucas De Marchi | e005fac | 2011-12-08 10:42:34 -0200 | [diff] [blame] | 513 | char *line; |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 514 | |
Gustavo Sverzut Barbieri | d01c67e | 2011-12-11 19:42:02 -0200 | [diff] [blame] | 515 | DBG(mod->ctx, "name='%s' path='%s'\n", mod->name, mod->path); |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 516 | |
Lucas De Marchi | e005fac | 2011-12-08 10:42:34 -0200 | [diff] [blame] | 517 | if (mod->path != NULL) |
| 518 | return mod->path; |
| 519 | if (mod->init.dep) |
| 520 | return NULL; |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 521 | |
Lucas De Marchi | e005fac | 2011-12-08 10:42:34 -0200 | [diff] [blame] | 522 | /* lazy init */ |
| 523 | line = kmod_search_moddep(mod->ctx, mod->name); |
| 524 | if (line == NULL) |
| 525 | return NULL; |
| 526 | |
| 527 | kmod_module_parse_depline((struct kmod_module *) mod, line); |
| 528 | free(line); |
Lucas De Marchi | c5e7b1f | 2011-12-05 20:28:13 -0200 | [diff] [blame] | 529 | |
Lucas De Marchi | 6e869df | 2011-11-30 19:01:01 -0200 | [diff] [blame] | 530 | return mod->path; |
| 531 | } |
| 532 | |
| 533 | |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 534 | extern long delete_module(const char *name, unsigned int flags); |
| 535 | |
| 536 | KMOD_EXPORT int kmod_module_remove_module(struct kmod_module *mod, |
| 537 | unsigned int flags) |
| 538 | { |
| 539 | int err; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 540 | |
| 541 | if (mod == NULL) |
| 542 | return -ENOENT; |
| 543 | |
| 544 | /* Filter out other flags */ |
| 545 | flags &= (KMOD_REMOVE_FORCE | KMOD_REMOVE_NOWAIT); |
| 546 | |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 547 | err = delete_module(mod->name, flags); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 548 | if (err != 0) { |
Lucas De Marchi | d753b8c | 2011-12-05 18:14:51 -0200 | [diff] [blame] | 549 | ERR(mod->ctx, "Removing '%s': %s\n", mod->name, |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 550 | strerror(-err)); |
| 551 | return err; |
| 552 | } |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | extern long init_module(void *mem, unsigned long len, const char *args); |
| 558 | |
| 559 | KMOD_EXPORT int kmod_module_insert_module(struct kmod_module *mod, |
Gustavo Sverzut Barbieri | 3a721bb | 2011-12-10 21:02:39 -0200 | [diff] [blame] | 560 | unsigned int flags, |
| 561 | const char *options) |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 562 | { |
| 563 | int err; |
| 564 | void *mmaped_file; |
| 565 | struct stat st; |
| 566 | int fd; |
Gustavo Sverzut Barbieri | 3a721bb | 2011-12-10 21:02:39 -0200 | [diff] [blame] | 567 | const char *args = options ? options : ""; |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 568 | |
| 569 | if (mod == NULL) |
| 570 | return -ENOENT; |
| 571 | |
| 572 | if (mod->path == NULL) { |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 573 | 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] | 574 | return -ENOSYS; |
| 575 | } |
| 576 | |
| 577 | if (flags != 0) |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 578 | INFO(mod->ctx, "Flags are not implemented yet\n"); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 579 | |
| 580 | if ((fd = open(mod->path, O_RDONLY)) < 0) { |
| 581 | err = -errno; |
| 582 | return err; |
| 583 | } |
| 584 | |
Lucas De Marchi | b418a82 | 2011-12-01 23:13:27 -0200 | [diff] [blame] | 585 | fstat(fd, &st); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 586 | |
| 587 | if ((mmaped_file = mmap(0, st.st_size, PROT_READ, |
| 588 | MAP_PRIVATE, fd, 0)) == MAP_FAILED) { |
| 589 | close(fd); |
| 590 | return -errno; |
| 591 | } |
| 592 | |
| 593 | err = init_module(mmaped_file, st.st_size, args); |
| 594 | if (err < 0) |
Lucas De Marchi | 1b2e26a | 2011-11-25 01:28:39 -0200 | [diff] [blame] | 595 | ERR(mod->ctx, "Failed to insert module '%s'\n", mod->path); |
Lucas De Marchi | 8f788d5 | 2011-11-25 01:22:56 -0200 | [diff] [blame] | 596 | |
| 597 | munmap(mmaped_file, st.st_size); |
| 598 | close(fd); |
| 599 | |
| 600 | return err; |
| 601 | } |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 602 | |
Lucas De Marchi | 49ce6d0 | 2011-12-12 13:56:47 -0200 | [diff] [blame] | 603 | KMOD_EXPORT const char *kmod_module_get_options(const struct kmod_module *mod) |
| 604 | { |
| 605 | if (mod == NULL) |
| 606 | return NULL; |
| 607 | |
| 608 | if (!mod->init.options) { |
| 609 | /* lazy init */ |
| 610 | struct kmod_module *m = (struct kmod_module *)mod; |
| 611 | const struct kmod_list *l, *ctx_options; |
| 612 | char *opts = NULL; |
| 613 | size_t optslen = 0; |
| 614 | |
| 615 | ctx_options = kmod_get_options(mod->ctx); |
| 616 | |
| 617 | kmod_list_foreach(l, ctx_options) { |
| 618 | const char *modname = kmod_option_get_modname(l); |
| 619 | const char *str; |
| 620 | size_t len; |
| 621 | void *tmp; |
| 622 | |
| 623 | if (strcmp(modname, mod->name) != 0) |
| 624 | continue; |
| 625 | |
| 626 | str = kmod_option_get_options(l); |
| 627 | len = strlen(str); |
| 628 | if (len < 1) |
| 629 | continue; |
| 630 | |
| 631 | tmp = realloc(opts, optslen + len + 2); |
| 632 | if (tmp == NULL) { |
| 633 | free(opts); |
| 634 | goto failed; |
| 635 | } |
| 636 | |
| 637 | opts = tmp; |
| 638 | |
| 639 | if (optslen > 0) { |
| 640 | opts[optslen] = ' '; |
| 641 | optslen++; |
| 642 | } |
| 643 | |
| 644 | memcpy(opts + optslen, str, len); |
| 645 | optslen += len; |
| 646 | opts[optslen] = '\0'; |
| 647 | } |
| 648 | |
| 649 | m->init.options = true; |
| 650 | m->options = opts; |
| 651 | } |
| 652 | |
| 653 | return mod->options; |
| 654 | |
| 655 | failed: |
| 656 | ERR(mod->ctx, "out of memory\n"); |
| 657 | return NULL; |
| 658 | } |
| 659 | |
| 660 | KMOD_EXPORT const char *kmod_module_get_install_commands(const struct kmod_module *mod) |
| 661 | { |
| 662 | if (mod == NULL) |
| 663 | return NULL; |
| 664 | |
| 665 | if (!mod->init.install_commands) { |
| 666 | /* lazy init */ |
| 667 | struct kmod_module *m = (struct kmod_module *)mod; |
| 668 | const struct kmod_list *l, *ctx_install_commands; |
| 669 | char *cmds = NULL; |
| 670 | size_t cmdslen = 0; |
| 671 | |
| 672 | ctx_install_commands = kmod_get_install_commands(mod->ctx); |
| 673 | |
| 674 | kmod_list_foreach(l, ctx_install_commands) { |
| 675 | const char *modname = kmod_command_get_modname(l); |
| 676 | const char *str; |
| 677 | size_t len; |
| 678 | void *tmp; |
| 679 | |
| 680 | if (strcmp(modname, mod->name) != 0) |
| 681 | continue; |
| 682 | |
| 683 | str = kmod_command_get_command(l); |
| 684 | len = strlen(str); |
| 685 | if (len < 1) |
| 686 | continue; |
| 687 | |
| 688 | tmp = realloc(cmds, cmdslen + len + 2); |
| 689 | if (tmp == NULL) { |
| 690 | free(cmds); |
| 691 | goto failed; |
| 692 | } |
| 693 | |
| 694 | cmds = tmp; |
| 695 | |
| 696 | if (cmdslen > 0) { |
| 697 | cmds[cmdslen] = ';'; |
| 698 | cmdslen++; |
| 699 | } |
| 700 | |
| 701 | memcpy(cmds + cmdslen, str, len); |
| 702 | cmdslen += len; |
| 703 | cmds[cmdslen] = '\0'; |
| 704 | } |
| 705 | |
| 706 | m->init.install_commands = true; |
| 707 | m->install_commands = cmds; |
| 708 | } |
| 709 | |
| 710 | return mod->install_commands; |
| 711 | |
| 712 | failed: |
| 713 | ERR(mod->ctx, "out of memory\n"); |
| 714 | return NULL; |
| 715 | } |
| 716 | |
| 717 | KMOD_EXPORT const char *kmod_module_get_remove_commands(const struct kmod_module *mod) |
| 718 | { |
| 719 | if (mod == NULL) |
| 720 | return NULL; |
| 721 | |
| 722 | if (!mod->init.remove_commands) { |
| 723 | /* lazy init */ |
| 724 | struct kmod_module *m = (struct kmod_module *)mod; |
| 725 | const struct kmod_list *l, *ctx_remove_commands; |
| 726 | char *cmds = NULL; |
| 727 | size_t cmdslen = 0; |
| 728 | |
| 729 | ctx_remove_commands = kmod_get_remove_commands(mod->ctx); |
| 730 | |
| 731 | kmod_list_foreach(l, ctx_remove_commands) { |
| 732 | const char *modname = kmod_command_get_modname(l); |
| 733 | const char *str; |
| 734 | size_t len; |
| 735 | void *tmp; |
| 736 | |
| 737 | if (strcmp(modname, mod->name) != 0) |
| 738 | continue; |
| 739 | |
| 740 | str = kmod_command_get_command(l); |
| 741 | len = strlen(str); |
| 742 | if (len < 1) |
| 743 | continue; |
| 744 | |
| 745 | tmp = realloc(cmds, cmdslen + len + 2); |
| 746 | if (tmp == NULL) { |
| 747 | free(cmds); |
| 748 | goto failed; |
| 749 | } |
| 750 | |
| 751 | cmds = tmp; |
| 752 | |
| 753 | if (cmdslen > 0) { |
| 754 | cmds[cmdslen] = ';'; |
| 755 | cmdslen++; |
| 756 | } |
| 757 | |
| 758 | memcpy(cmds + cmdslen, str, len); |
| 759 | cmdslen += len; |
| 760 | cmds[cmdslen] = '\0'; |
| 761 | } |
| 762 | |
| 763 | m->init.remove_commands = true; |
| 764 | m->remove_commands = cmds; |
| 765 | } |
| 766 | |
| 767 | return mod->remove_commands; |
| 768 | |
| 769 | failed: |
| 770 | ERR(mod->ctx, "out of memory\n"); |
| 771 | return NULL; |
| 772 | } |
| 773 | |
| 774 | /** |
| 775 | * SECTION:libkmod-loaded |
| 776 | * @short_description: currently loaded modules |
| 777 | * |
| 778 | * Information about currently loaded modules, as reported by Linux kernel. |
| 779 | * These information are not cached by libkmod and are always read from /sys |
| 780 | * and /proc/modules. |
| 781 | */ |
| 782 | |
| 783 | /** |
| 784 | * kmod_module_new_from_loaded: |
| 785 | * @ctx: kmod library context |
| 786 | * @list: where to save the list of loaded modules |
| 787 | * |
| 788 | * Get a list of all modules currently loaded in kernel. It uses /proc/modules |
| 789 | * to get the names of loaded modules and to create kmod_module objects by |
| 790 | * calling kmod_module_new_from_name() in each of them. They are put are put |
| 791 | * in @list in no particular order. |
| 792 | * |
| 793 | * All the returned modules get their refcount incremented (or are created if |
| 794 | * they do not exist yet). After using the list, release the resources by |
| 795 | * calling kmod_module_unref_list(). |
| 796 | * |
| 797 | * Returns: 0 on success or < 0 on error. |
| 798 | */ |
| 799 | KMOD_EXPORT int kmod_module_new_from_loaded(struct kmod_ctx *ctx, |
| 800 | struct kmod_list **list) |
| 801 | { |
| 802 | struct kmod_list *l = NULL; |
| 803 | FILE *fp; |
| 804 | char line[4096]; |
| 805 | |
| 806 | if (ctx == NULL || list == NULL) |
| 807 | return -ENOENT; |
| 808 | |
| 809 | fp = fopen("/proc/modules", "r"); |
| 810 | if (fp == NULL) { |
| 811 | int err = -errno; |
| 812 | ERR(ctx, "could not open /proc/modules: %s\n", strerror(errno)); |
| 813 | return err; |
| 814 | } |
| 815 | |
| 816 | while (fgets(line, sizeof(line), fp)) { |
| 817 | struct kmod_module *m; |
| 818 | struct kmod_list *node; |
| 819 | int err; |
| 820 | char *saveptr, *name = strtok_r(line, " \t", &saveptr); |
| 821 | |
| 822 | err = kmod_module_new_from_name(ctx, name, &m); |
| 823 | if (err < 0) { |
| 824 | ERR(ctx, "could not get module from name '%s': %s\n", |
| 825 | name, strerror(-err)); |
| 826 | continue; |
| 827 | } |
| 828 | |
| 829 | node = kmod_list_append(l, m); |
| 830 | if (node) |
| 831 | l = node; |
| 832 | else { |
| 833 | ERR(ctx, "out of memory\n"); |
| 834 | kmod_module_unref(m); |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | fclose(fp); |
| 839 | *list = l; |
| 840 | |
| 841 | return 0; |
| 842 | } |
| 843 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 844 | KMOD_EXPORT const char *kmod_module_initstate_str(enum kmod_module_initstate state) |
| 845 | { |
| 846 | switch (state) { |
| 847 | case KMOD_MODULE_BUILTIN: |
| 848 | return "builtin"; |
| 849 | case KMOD_MODULE_LIVE: |
| 850 | return "live"; |
| 851 | case KMOD_MODULE_COMING: |
| 852 | return "coming"; |
| 853 | case KMOD_MODULE_GOING: |
| 854 | return "going"; |
| 855 | default: |
| 856 | return NULL; |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | KMOD_EXPORT int kmod_module_get_initstate(const struct kmod_module *mod) |
| 861 | { |
| 862 | char path[PATH_MAX], buf[32]; |
| 863 | int fd, err, pathlen; |
| 864 | |
| 865 | pathlen = snprintf(path, sizeof(path), |
| 866 | "/sys/module/%s/initstate", mod->name); |
| 867 | fd = open(path, O_RDONLY); |
| 868 | if (fd < 0) { |
| 869 | err = -errno; |
| 870 | |
| 871 | if (pathlen > (int)sizeof("/initstate") - 1) { |
| 872 | struct stat st; |
| 873 | path[pathlen - (sizeof("/initstate") - 1)] = '\0'; |
| 874 | if (stat(path, &st) == 0 && S_ISDIR(st.st_mode)) |
| 875 | return KMOD_MODULE_BUILTIN; |
| 876 | } |
| 877 | |
Gustavo Sverzut Barbieri | 926f67a | 2011-12-11 19:33:03 -0200 | [diff] [blame] | 878 | DBG(mod->ctx, "could not open '%s': %s\n", |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 879 | path, strerror(-err)); |
| 880 | return err; |
| 881 | } |
| 882 | |
| 883 | err = read_str_safe(fd, buf, sizeof(buf)); |
| 884 | close(fd); |
| 885 | if (err < 0) { |
| 886 | ERR(mod->ctx, "could not read from '%s': %s\n", |
| 887 | path, strerror(-err)); |
| 888 | return err; |
| 889 | } |
| 890 | |
Lucas De Marchi | 877e80c | 2011-12-07 02:26:31 -0200 | [diff] [blame] | 891 | if (streq(buf, "live\n")) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 892 | return KMOD_MODULE_LIVE; |
Lucas De Marchi | 877e80c | 2011-12-07 02:26:31 -0200 | [diff] [blame] | 893 | else if (streq(buf, "coming\n")) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 894 | return KMOD_MODULE_COMING; |
Lucas De Marchi | 877e80c | 2011-12-07 02:26:31 -0200 | [diff] [blame] | 895 | else if (streq(buf, "going\n")) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 896 | return KMOD_MODULE_GOING; |
| 897 | |
| 898 | ERR(mod->ctx, "unknown %s: '%s'\n", path, buf); |
| 899 | return -EINVAL; |
| 900 | } |
| 901 | |
| 902 | KMOD_EXPORT int kmod_module_get_refcnt(const struct kmod_module *mod) |
| 903 | { |
| 904 | char path[PATH_MAX]; |
| 905 | long refcnt; |
| 906 | int fd, err; |
| 907 | |
| 908 | snprintf(path, sizeof(path), "/sys/module/%s/refcnt", mod->name); |
| 909 | fd = open(path, O_RDONLY); |
| 910 | if (fd < 0) { |
| 911 | err = -errno; |
| 912 | ERR(mod->ctx, "could not open '%s': %s\n", |
| 913 | path, strerror(errno)); |
| 914 | return err; |
| 915 | } |
| 916 | |
| 917 | err = read_str_long(fd, &refcnt, 10); |
| 918 | close(fd); |
| 919 | if (err < 0) { |
| 920 | ERR(mod->ctx, "could not read integer from '%s': '%s'\n", |
| 921 | path, strerror(-err)); |
| 922 | return err; |
| 923 | } |
| 924 | |
| 925 | return (int)refcnt; |
| 926 | } |
| 927 | |
| 928 | KMOD_EXPORT struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod) |
| 929 | { |
| 930 | char dname[PATH_MAX]; |
| 931 | struct kmod_list *list = NULL; |
| 932 | DIR *d; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 933 | |
| 934 | if (mod == NULL) |
| 935 | return NULL; |
| 936 | snprintf(dname, sizeof(dname), "/sys/module/%s/holders", mod->name); |
| 937 | |
| 938 | d = opendir(dname); |
| 939 | if (d == NULL) { |
| 940 | ERR(mod->ctx, "could not open '%s': %s\n", |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 941 | dname, strerror(errno)); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 942 | return NULL; |
| 943 | } |
| 944 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 945 | for (;;) { |
| 946 | struct dirent de, *entp; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 947 | struct kmod_module *holder; |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 948 | struct kmod_list *l; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 949 | int err; |
| 950 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 951 | err = readdir_r(d, &de, &entp); |
| 952 | if (err != 0) { |
| 953 | ERR(mod->ctx, "could not iterate for module '%s': %s\n", |
| 954 | mod->name, strerror(-err)); |
| 955 | goto fail; |
| 956 | } |
| 957 | |
| 958 | if (entp == NULL) |
| 959 | break; |
| 960 | |
| 961 | if (de.d_name[0] == '.') { |
| 962 | if (de.d_name[1] == '\0' || |
| 963 | (de.d_name[1] == '.' && de.d_name[2] == '\0')) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 964 | continue; |
| 965 | } |
| 966 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 967 | 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] | 968 | if (err < 0) { |
| 969 | ERR(mod->ctx, "could not create module for '%s': %s\n", |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 970 | de.d_name, strerror(-err)); |
| 971 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 972 | } |
| 973 | |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 974 | l = kmod_list_append(list, holder); |
| 975 | if (l != NULL) { |
| 976 | list = l; |
| 977 | } else { |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 978 | ERR(mod->ctx, "out of memory\n"); |
| 979 | kmod_module_unref(holder); |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 980 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 981 | } |
| 982 | } |
| 983 | |
| 984 | closedir(d); |
| 985 | return list; |
Lucas De Marchi | 53886dd | 2011-12-05 13:24:23 -0200 | [diff] [blame] | 986 | |
| 987 | fail: |
| 988 | closedir(d); |
| 989 | kmod_module_unref_list(list); |
| 990 | return NULL; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | struct kmod_module_section { |
| 994 | unsigned long address; |
| 995 | char name[]; |
| 996 | }; |
| 997 | |
| 998 | static void kmod_module_section_free(struct kmod_module_section *section) |
| 999 | { |
| 1000 | free(section); |
| 1001 | } |
| 1002 | |
| 1003 | KMOD_EXPORT struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod) |
| 1004 | { |
| 1005 | char dname[PATH_MAX]; |
| 1006 | struct kmod_list *list = NULL; |
| 1007 | DIR *d; |
| 1008 | int dfd; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1009 | |
| 1010 | if (mod == NULL) |
| 1011 | return NULL; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 1012 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1013 | snprintf(dname, sizeof(dname), "/sys/module/%s/sections", mod->name); |
| 1014 | |
| 1015 | d = opendir(dname); |
| 1016 | if (d == NULL) { |
| 1017 | ERR(mod->ctx, "could not open '%s': %s\n", |
| 1018 | dname, strerror(errno)); |
| 1019 | return NULL; |
| 1020 | } |
| 1021 | |
| 1022 | dfd = dirfd(d); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1023 | |
| 1024 | for (;;) { |
| 1025 | struct dirent de, *entp; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1026 | struct kmod_module_section *section; |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1027 | struct kmod_list *l; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1028 | unsigned long address; |
| 1029 | size_t namesz; |
| 1030 | int fd, err; |
| 1031 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1032 | err = readdir_r(d, &de, &entp); |
| 1033 | if (err != 0) { |
| 1034 | ERR(mod->ctx, "could not iterate for module '%s': %s\n", |
| 1035 | mod->name, strerror(-err)); |
| 1036 | goto fail; |
| 1037 | } |
| 1038 | |
| 1039 | if (de.d_name[0] == '.') { |
| 1040 | if (de.d_name[1] == '\0' || |
| 1041 | (de.d_name[1] == '.' && de.d_name[2] == '\0')) |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1042 | continue; |
| 1043 | } |
| 1044 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1045 | fd = openat(dfd, de.d_name, O_RDONLY); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1046 | if (fd < 0) { |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1047 | ERR(mod->ctx, "could not open '%s/%s': %m\n", |
| 1048 | dname, de.d_name); |
| 1049 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1050 | } |
| 1051 | |
| 1052 | err = read_str_ulong(fd, &address, 16); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1053 | close(fd); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1054 | if (err < 0) { |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1055 | ERR(mod->ctx, "could not read long from '%s/%s': %m\n", |
| 1056 | dname, de.d_name); |
| 1057 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1058 | } |
| 1059 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1060 | namesz = strlen(de.d_name) + 1; |
| 1061 | section = malloc(sizeof(*section) + namesz); |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1062 | |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1063 | if (section == NULL) { |
| 1064 | ERR(mod->ctx, "out of memory\n"); |
| 1065 | goto fail; |
| 1066 | } |
| 1067 | |
| 1068 | section->address = address; |
| 1069 | memcpy(section->name, de.d_name, namesz); |
| 1070 | |
| 1071 | l = kmod_list_append(list, section); |
| 1072 | if (l != NULL) { |
| 1073 | list = l; |
| 1074 | } else { |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1075 | ERR(mod->ctx, "out of memory\n"); |
| 1076 | free(section); |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1077 | goto fail; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1078 | } |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1079 | } |
| 1080 | |
| 1081 | closedir(d); |
| 1082 | return list; |
Lucas De Marchi | 40923bd | 2011-12-05 13:40:16 -0200 | [diff] [blame] | 1083 | |
| 1084 | fail: |
| 1085 | closedir(d); |
| 1086 | kmod_module_unref_list(list); |
| 1087 | return NULL; |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1088 | } |
| 1089 | |
| 1090 | KMOD_EXPORT const char *kmod_module_section_get_name(const struct kmod_list *entry) |
| 1091 | { |
| 1092 | struct kmod_module_section *section; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 1093 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1094 | if (entry == NULL) |
| 1095 | return NULL; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 1096 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1097 | section = entry->data; |
| 1098 | return section->name; |
| 1099 | } |
| 1100 | |
| 1101 | KMOD_EXPORT unsigned long kmod_module_section_get_address(const struct kmod_list *entry) |
| 1102 | { |
| 1103 | struct kmod_module_section *section; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 1104 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1105 | if (entry == NULL) |
| 1106 | return (unsigned long)-1; |
Lucas De Marchi | 28c175e | 2011-12-12 11:52:59 -0200 | [diff] [blame] | 1107 | |
Gustavo Sverzut Barbieri | f12ae3c | 2011-12-04 12:40:00 -0200 | [diff] [blame] | 1108 | section = entry->data; |
| 1109 | return section->address; |
| 1110 | } |
| 1111 | |
| 1112 | KMOD_EXPORT void kmod_module_section_free_list(struct kmod_list *list) |
| 1113 | { |
| 1114 | while (list) { |
| 1115 | kmod_module_section_free(list->data); |
| 1116 | list = kmod_list_remove(list); |
| 1117 | } |
| 1118 | } |