[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Modprobe written from scratch for BusyBox
|
---|
| 4 | *
|
---|
[2725] | 5 | * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
|
---|
| 6 | * Copyright (c) 2008 Vladimir Dronnikov
|
---|
[821] | 7 | *
|
---|
[2725] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
| 9 | */
|
---|
[821] | 10 |
|
---|
[3232] | 11 | //applet:IF_MODPROBE(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
|
---|
[2725] | 12 |
|
---|
[3232] | 13 | #include "libbb.h"
|
---|
| 14 | #include "modutils.h"
|
---|
| 15 | #include <sys/utsname.h>
|
---|
| 16 | #include <fnmatch.h>
|
---|
| 17 |
|
---|
| 18 | //#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
|
---|
| 19 | #define DBG(...) ((void)0)
|
---|
| 20 |
|
---|
| 21 | /* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
|
---|
| 22 | * we expect the full dependency list to be specified in modules.dep.
|
---|
| 23 | * Older versions would only export the direct dependency list.
|
---|
| 24 | */
|
---|
| 25 |
|
---|
| 26 |
|
---|
[2725] | 27 | //usage:#if !ENABLE_MODPROBE_SMALL
|
---|
| 28 | //usage:#define modprobe_notes_usage
|
---|
| 29 | //usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
|
---|
| 30 | //usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
|
---|
| 31 | //usage: "pass each module it loads.\n"
|
---|
| 32 | //usage: "\n"
|
---|
| 33 | //usage: "The configuration file is searched (in this order):\n"
|
---|
| 34 | //usage: "\n"
|
---|
| 35 | //usage: " /etc/modprobe.conf (2.6 only)\n"
|
---|
| 36 | //usage: " /etc/modules.conf\n"
|
---|
| 37 | //usage: " /etc/conf.modules (deprecated)\n"
|
---|
| 38 | //usage: "\n"
|
---|
| 39 | //usage: "They all have the same syntax (see below). If none is present, it is\n"
|
---|
| 40 | //usage: "_not_ an error; each loaded module is then expected to load without\n"
|
---|
| 41 | //usage: "options. Once a file is found, the others are tested for.\n"
|
---|
| 42 | //usage: "\n"
|
---|
| 43 | //usage: "/etc/modules.conf entry format:\n"
|
---|
| 44 | //usage: "\n"
|
---|
| 45 | //usage: " alias <alias_name> <mod_name>\n"
|
---|
| 46 | //usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
|
---|
| 47 | //usage: " It makes sense if your mod_name is long, or you want a more representative\n"
|
---|
| 48 | //usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
|
---|
| 49 | //usage: " This makes it also possible to use a different set of options (below) for\n"
|
---|
| 50 | //usage: " the module and the alias.\n"
|
---|
| 51 | //usage: " A module can be aliased more than once.\n"
|
---|
| 52 | //usage: "\n"
|
---|
| 53 | //usage: " options <mod_name|alias_name> <symbol=value...>\n"
|
---|
| 54 | //usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
|
---|
| 55 | //usage: " the \"symbol=value\" pairs as option to that module.\n"
|
---|
| 56 | //usage: "\n"
|
---|
| 57 | //usage: "Sample /etc/modules.conf file:\n"
|
---|
| 58 | //usage: "\n"
|
---|
| 59 | //usage: " options tulip irq=3\n"
|
---|
| 60 | //usage: " alias tulip tulip2\n"
|
---|
| 61 | //usage: " options tulip2 irq=4 io=0x308\n"
|
---|
| 62 | //usage: "\n"
|
---|
| 63 | //usage: "Other functionality offered by 'classic' modprobe is not available in\n"
|
---|
| 64 | //usage: "this implementation.\n"
|
---|
| 65 | //usage: "\n"
|
---|
| 66 | //usage: "If module options are present both in the config file, and on the command line,\n"
|
---|
| 67 | //usage: "then the options from the command line will be passed to the module _after_\n"
|
---|
| 68 | //usage: "the options from the config file. That way, you can have defaults in the config\n"
|
---|
| 69 | //usage: "file, and override them for a specific usage from the command line.\n"
|
---|
| 70 | //usage:#define modprobe_example_usage
|
---|
| 71 | //usage: "(with the above /etc/modules.conf):\n\n"
|
---|
| 72 | //usage: "$ modprobe tulip\n"
|
---|
| 73 | //usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
|
---|
| 74 | //usage: "$ modprobe tulip irq=5\n"
|
---|
| 75 | //usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
|
---|
| 76 | //usage: "$ modprobe tulip2\n"
|
---|
| 77 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
|
---|
| 78 | //usage: " which are the default for alias 'tulip2'\n\n"
|
---|
| 79 | //usage: "$ modprobe tulip2 irq=8\n"
|
---|
| 80 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
|
---|
| 81 | //usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
|
---|
| 82 | //usage: " from the command line\n\n"
|
---|
| 83 | //usage: "$ modprobe tulip2 irq=2 io=0x210\n"
|
---|
| 84 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
|
---|
| 85 | //usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
|
---|
| 86 | //usage: " from the command line\n"
|
---|
| 87 | //usage:
|
---|
| 88 | //usage:#define modprobe_trivial_usage
|
---|
[3232] | 89 | //usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
|
---|
| 90 | //usage: " MODULE [symbol=value]..."
|
---|
[2725] | 91 | //usage:#define modprobe_full_usage "\n\n"
|
---|
[3232] | 92 | //usage: " -a Load multiple MODULEs"
|
---|
[2725] | 93 | //usage: "\n -l List (MODULE is a pattern)"
|
---|
| 94 | //usage: "\n -r Remove MODULE (stacks) or do autoclean"
|
---|
| 95 | //usage: "\n -q Quiet"
|
---|
| 96 | //usage: "\n -v Verbose"
|
---|
| 97 | //usage: "\n -s Log to syslog"
|
---|
[3232] | 98 | //usage: "\n -D Show dependencies"
|
---|
[2725] | 99 | //usage: IF_FEATURE_MODPROBE_BLACKLIST(
|
---|
| 100 | //usage: "\n -b Apply blacklist to module names too"
|
---|
| 101 | //usage: )
|
---|
| 102 | //usage:#endif /* !ENABLE_MODPROBE_SMALL */
|
---|
| 103 |
|
---|
[3232] | 104 | /* Note: usage text doesn't document various 2.4 options
|
---|
| 105 | * we pull in through INSMOD_OPTS define
|
---|
| 106 | * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
|
---|
| 107 | * it is a no-op.
|
---|
[2725] | 108 | */
|
---|
[3232] | 109 | #define MODPROBE_OPTS "alrDb"
|
---|
| 110 | /* -a and -D _are_ in fact compatible */
|
---|
| 111 | #define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
|
---|
| 112 | //#define MODPROBE_OPTS "acd:lnrt:C:b"
|
---|
[2725] | 113 | //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
|
---|
| 114 | enum {
|
---|
[3232] | 115 | OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
|
---|
| 116 | //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
|
---|
| 117 | //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
|
---|
| 118 | OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
|
---|
| 119 | //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
|
---|
| 120 | OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
|
---|
| 121 | //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
|
---|
| 122 | //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
|
---|
| 123 | //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
|
---|
| 124 | OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
|
---|
| 125 | OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
|
---|
[821] | 126 | };
|
---|
[3232] | 127 | #if ENABLE_LONG_OPTS
|
---|
| 128 | static const char modprobe_longopts[] ALIGN1 =
|
---|
| 129 | /* nobody asked for long opts (yet) */
|
---|
| 130 | // "all\0" No_argument "a"
|
---|
| 131 | // "list\0" No_argument "l"
|
---|
| 132 | // "remove\0" No_argument "r"
|
---|
| 133 | // "quiet\0" No_argument "q"
|
---|
| 134 | // "verbose\0" No_argument "v"
|
---|
| 135 | // "syslog\0" No_argument "s"
|
---|
| 136 | /* module-init-tools 3.11.1 has only long opt --show-depends
|
---|
| 137 | * but no short -D, we provide long opt for scripts which
|
---|
| 138 | * were written for 3.11.1: */
|
---|
| 139 | "show-depends\0" No_argument "D"
|
---|
| 140 | // "use-blacklist\0" No_argument "b"
|
---|
| 141 | ;
|
---|
| 142 | #endif
|
---|
[821] | 143 |
|
---|
[2725] | 144 | #define MODULE_FLAG_LOADED 0x0001
|
---|
| 145 | #define MODULE_FLAG_NEED_DEPS 0x0002
|
---|
| 146 | /* "was seen in modules.dep": */
|
---|
| 147 | #define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
|
---|
| 148 | #define MODULE_FLAG_BLACKLISTED 0x0008
|
---|
[821] | 149 |
|
---|
[2725] | 150 | struct module_entry { /* I'll call it ME. */
|
---|
| 151 | unsigned flags;
|
---|
| 152 | char *modname; /* stripped of /path/, .ext and s/-/_/g */
|
---|
| 153 | const char *probed_name; /* verbatim as seen on cmdline */
|
---|
| 154 | char *options; /* options from config files */
|
---|
| 155 | llist_t *realnames; /* strings. if this module is an alias, */
|
---|
| 156 | /* real module name is one of these. */
|
---|
| 157 | //Can there really be more than one? Example from real kernel?
|
---|
| 158 | llist_t *deps; /* strings. modules we depend on */
|
---|
[821] | 159 | };
|
---|
| 160 |
|
---|
[3232] | 161 | #define DB_HASH_SIZE 256
|
---|
| 162 |
|
---|
[2725] | 163 | struct globals {
|
---|
| 164 | llist_t *probes; /* MEs of module(s) requested on cmdline */
|
---|
| 165 | char *cmdline_mopts; /* module options from cmdline */
|
---|
| 166 | int num_unresolved_deps;
|
---|
| 167 | /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
|
---|
| 168 | smallint need_symbols;
|
---|
[3232] | 169 | struct utsname uts;
|
---|
| 170 | llist_t *db[DB_HASH_SIZE]; /* MEs of all modules ever seen (caching for speed) */
|
---|
[2725] | 171 | } FIX_ALIASING;
|
---|
[3232] | 172 | #define G (*ptr_to_globals)
|
---|
| 173 | #define INIT_G() do { \
|
---|
| 174 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
---|
| 175 | } while (0)
|
---|
[821] | 176 |
|
---|
| 177 |
|
---|
[2725] | 178 | static int read_config(const char *path);
|
---|
[821] | 179 |
|
---|
[2725] | 180 | static char *gather_options_str(char *opts, const char *append)
|
---|
[821] | 181 | {
|
---|
[2725] | 182 | /* Speed-optimized. We call gather_options_str many times. */
|
---|
| 183 | if (append) {
|
---|
| 184 | if (opts == NULL) {
|
---|
| 185 | opts = xstrdup(append);
|
---|
| 186 | } else {
|
---|
| 187 | int optlen = strlen(opts);
|
---|
| 188 | opts = xrealloc(opts, optlen + strlen(append) + 2);
|
---|
| 189 | sprintf(opts + optlen, " %s", append);
|
---|
| 190 | }
|
---|
| 191 | }
|
---|
| 192 | return opts;
|
---|
[821] | 193 | }
|
---|
| 194 |
|
---|
[3232] | 195 | /* These three functions called many times, optimizing for speed.
|
---|
| 196 | * Users reported minute-long delays when they runn iptables repeatedly
|
---|
| 197 | * (iptables use modprobe to install needed kernel modules).
|
---|
| 198 | */
|
---|
[2725] | 199 | static struct module_entry *helper_get_module(const char *module, int create)
|
---|
[821] | 200 | {
|
---|
[2725] | 201 | char modname[MODULE_NAME_LEN];
|
---|
| 202 | struct module_entry *e;
|
---|
| 203 | llist_t *l;
|
---|
[3232] | 204 | unsigned i;
|
---|
| 205 | unsigned hash;
|
---|
[821] | 206 |
|
---|
[2725] | 207 | filename2modname(module, modname);
|
---|
[3232] | 208 |
|
---|
| 209 | hash = 0;
|
---|
| 210 | for (i = 0; modname[i]; i++)
|
---|
| 211 | hash = ((hash << 5) + hash) + modname[i];
|
---|
| 212 | hash %= DB_HASH_SIZE;
|
---|
| 213 |
|
---|
| 214 | for (l = G.db[hash]; l; l = l->link) {
|
---|
[2725] | 215 | e = (struct module_entry *) l->data;
|
---|
| 216 | if (strcmp(e->modname, modname) == 0)
|
---|
| 217 | return e;
|
---|
[821] | 218 | }
|
---|
[2725] | 219 | if (!create)
|
---|
| 220 | return NULL;
|
---|
[821] | 221 |
|
---|
[2725] | 222 | e = xzalloc(sizeof(*e));
|
---|
| 223 | e->modname = xstrdup(modname);
|
---|
[3232] | 224 | llist_add_to(&G.db[hash], e);
|
---|
[821] | 225 |
|
---|
[2725] | 226 | return e;
|
---|
[821] | 227 | }
|
---|
[3232] | 228 | static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module)
|
---|
[2725] | 229 | {
|
---|
| 230 | return helper_get_module(module, 1);
|
---|
| 231 | }
|
---|
[3232] | 232 | static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
|
---|
[2725] | 233 | {
|
---|
| 234 | return helper_get_module(module, 0);
|
---|
| 235 | }
|
---|
[821] | 236 |
|
---|
[2725] | 237 | static void add_probe(const char *name)
|
---|
[821] | 238 | {
|
---|
[2725] | 239 | struct module_entry *m;
|
---|
[821] | 240 |
|
---|
[2725] | 241 | m = get_or_add_modentry(name);
|
---|
[3232] | 242 | if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
|
---|
[2725] | 243 | && (m->flags & MODULE_FLAG_LOADED)
|
---|
| 244 | ) {
|
---|
| 245 | DBG("skipping %s, it is already loaded", name);
|
---|
| 246 | return;
|
---|
| 247 | }
|
---|
[821] | 248 |
|
---|
[2725] | 249 | DBG("queuing %s", name);
|
---|
| 250 | m->probed_name = name;
|
---|
| 251 | m->flags |= MODULE_FLAG_NEED_DEPS;
|
---|
| 252 | llist_add_to_end(&G.probes, m);
|
---|
| 253 | G.num_unresolved_deps++;
|
---|
| 254 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS
|
---|
| 255 | && strncmp(m->modname, "symbol:", 7) == 0
|
---|
[1765] | 256 | ) {
|
---|
[2725] | 257 | G.need_symbols = 1;
|
---|
[821] | 258 | }
|
---|
| 259 | }
|
---|
| 260 |
|
---|
[2725] | 261 | static int FAST_FUNC config_file_action(const char *filename,
|
---|
| 262 | struct stat *statbuf UNUSED_PARAM,
|
---|
| 263 | void *userdata UNUSED_PARAM,
|
---|
| 264 | int depth UNUSED_PARAM)
|
---|
[821] | 265 | {
|
---|
[2725] | 266 | char *tokens[3];
|
---|
| 267 | parser_t *p;
|
---|
| 268 | struct module_entry *m;
|
---|
| 269 | int rc = TRUE;
|
---|
[821] | 270 |
|
---|
[2725] | 271 | if (bb_basename(filename)[0] == '.')
|
---|
| 272 | goto error;
|
---|
[821] | 273 |
|
---|
[2725] | 274 | p = config_open2(filename, fopen_for_read);
|
---|
| 275 | if (p == NULL) {
|
---|
| 276 | rc = FALSE;
|
---|
| 277 | goto error;
|
---|
| 278 | }
|
---|
[821] | 279 |
|
---|
[2725] | 280 | while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
|
---|
| 281 | //Use index_in_strings?
|
---|
| 282 | if (strcmp(tokens[0], "alias") == 0) {
|
---|
| 283 | /* alias <wildcard> <modulename> */
|
---|
| 284 | llist_t *l;
|
---|
| 285 | char wildcard[MODULE_NAME_LEN];
|
---|
| 286 | char *rmod;
|
---|
[821] | 287 |
|
---|
[2725] | 288 | if (tokens[2] == NULL)
|
---|
| 289 | continue;
|
---|
| 290 | filename2modname(tokens[1], wildcard);
|
---|
[821] | 291 |
|
---|
[3232] | 292 | for (l = G.probes; l; l = l->link) {
|
---|
[2725] | 293 | m = (struct module_entry *) l->data;
|
---|
| 294 | if (fnmatch(wildcard, m->modname, 0) != 0)
|
---|
| 295 | continue;
|
---|
| 296 | rmod = filename2modname(tokens[2], NULL);
|
---|
| 297 | llist_add_to(&m->realnames, rmod);
|
---|
[821] | 298 |
|
---|
[2725] | 299 | if (m->flags & MODULE_FLAG_NEED_DEPS) {
|
---|
| 300 | m->flags &= ~MODULE_FLAG_NEED_DEPS;
|
---|
| 301 | G.num_unresolved_deps--;
|
---|
[821] | 302 | }
|
---|
| 303 |
|
---|
[2725] | 304 | m = get_or_add_modentry(rmod);
|
---|
| 305 | if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
|
---|
| 306 | m->flags |= MODULE_FLAG_NEED_DEPS;
|
---|
| 307 | G.num_unresolved_deps++;
|
---|
[821] | 308 | }
|
---|
| 309 | }
|
---|
[2725] | 310 | } else if (strcmp(tokens[0], "options") == 0) {
|
---|
| 311 | /* options <modulename> <option...> */
|
---|
| 312 | if (tokens[2] == NULL)
|
---|
| 313 | continue;
|
---|
| 314 | m = get_or_add_modentry(tokens[1]);
|
---|
| 315 | m->options = gather_options_str(m->options, tokens[2]);
|
---|
| 316 | } else if (strcmp(tokens[0], "include") == 0) {
|
---|
| 317 | /* include <filename> */
|
---|
| 318 | read_config(tokens[1]);
|
---|
| 319 | } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
|
---|
| 320 | && strcmp(tokens[0], "blacklist") == 0
|
---|
| 321 | ) {
|
---|
| 322 | /* blacklist <modulename> */
|
---|
| 323 | get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
|
---|
[821] | 324 | }
|
---|
| 325 | }
|
---|
[2725] | 326 | config_close(p);
|
---|
| 327 | error:
|
---|
| 328 | return rc;
|
---|
[821] | 329 | }
|
---|
| 330 |
|
---|
[2725] | 331 | static int read_config(const char *path)
|
---|
[821] | 332 | {
|
---|
[2725] | 333 | return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
|
---|
| 334 | config_file_action, NULL, NULL, 1);
|
---|
| 335 | }
|
---|
[821] | 336 |
|
---|
[2725] | 337 | static const char *humanly_readable_name(struct module_entry *m)
|
---|
| 338 | {
|
---|
| 339 | /* probed_name may be NULL. modname always exists. */
|
---|
| 340 | return m->probed_name ? m->probed_name : m->modname;
|
---|
| 341 | }
|
---|
[821] | 342 |
|
---|
[2725] | 343 | static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
|
---|
| 344 | {
|
---|
| 345 | char *kcmdline_buf;
|
---|
| 346 | char *kcmdline;
|
---|
| 347 | char *kptr;
|
---|
| 348 | int len;
|
---|
[821] | 349 |
|
---|
[2725] | 350 | kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
|
---|
| 351 | if (!kcmdline_buf)
|
---|
| 352 | return options;
|
---|
[821] | 353 |
|
---|
[2725] | 354 | kcmdline = kcmdline_buf;
|
---|
| 355 | len = strlen(modulename);
|
---|
| 356 | while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
|
---|
| 357 | if (strncmp(modulename, kptr, len) != 0)
|
---|
[821] | 358 | continue;
|
---|
[2725] | 359 | kptr += len;
|
---|
| 360 | if (*kptr != '.')
|
---|
| 361 | continue;
|
---|
| 362 | /* It is "modulename.xxxx" */
|
---|
| 363 | kptr++;
|
---|
| 364 | if (strchr(kptr, '=') != NULL) {
|
---|
| 365 | /* It is "modulename.opt=[val]" */
|
---|
| 366 | options = gather_options_str(options, kptr);
|
---|
[821] | 367 | }
|
---|
| 368 | }
|
---|
[2725] | 369 | free(kcmdline_buf);
|
---|
[821] | 370 |
|
---|
[2725] | 371 | return options;
|
---|
[821] | 372 | }
|
---|
| 373 |
|
---|
[2725] | 374 | /* Return: similar to bb_init_module:
|
---|
| 375 | * 0 on success,
|
---|
| 376 | * -errno on open/read error,
|
---|
| 377 | * errno on init_module() error
|
---|
| 378 | */
|
---|
| 379 | /* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
|
---|
| 380 | * not deleted ones (those are still listed in modules.dep).
|
---|
| 381 | * module-init-tools version 3.4:
|
---|
| 382 | * # modprobe bogus
|
---|
| 383 | * FATAL: Module bogus not found. [exitcode 1]
|
---|
| 384 | * # modprobe -q bogus [silent, exitcode still 1]
|
---|
| 385 | * but:
|
---|
| 386 | * # rm kernel/drivers/net/dummy.ko
|
---|
| 387 | * # modprobe -q dummy
|
---|
| 388 | * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
|
---|
| 389 | * [exitcode 1]
|
---|
| 390 | */
|
---|
| 391 | static int do_modprobe(struct module_entry *m)
|
---|
[821] | 392 | {
|
---|
[2725] | 393 | int rc, first;
|
---|
[821] | 394 |
|
---|
[2725] | 395 | if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
|
---|
| 396 | if (!(option_mask32 & INSMOD_OPT_SILENT))
|
---|
| 397 | bb_error_msg("module %s not found in modules.dep",
|
---|
| 398 | humanly_readable_name(m));
|
---|
| 399 | return -ENOENT;
|
---|
| 400 | }
|
---|
| 401 | DBG("do_modprob'ing %s", m->modname);
|
---|
[821] | 402 |
|
---|
[3232] | 403 | if (!(option_mask32 & OPT_REMOVE))
|
---|
[2725] | 404 | m->deps = llist_rev(m->deps);
|
---|
[821] | 405 |
|
---|
[3232] | 406 | if (0) {
|
---|
| 407 | llist_t *l;
|
---|
| 408 | for (l = m->deps; l; l = l->link)
|
---|
| 409 | DBG("dep: %s", l->data);
|
---|
| 410 | }
|
---|
[821] | 411 |
|
---|
[2725] | 412 | first = 1;
|
---|
| 413 | rc = 0;
|
---|
| 414 | while (m->deps) {
|
---|
[3232] | 415 | struct module_entry *m2;
|
---|
| 416 | char *fn, *options;
|
---|
| 417 |
|
---|
[2725] | 418 | rc = 0;
|
---|
| 419 | fn = llist_pop(&m->deps); /* we leak it */
|
---|
| 420 | m2 = get_or_add_modentry(fn);
|
---|
[821] | 421 |
|
---|
[3232] | 422 | if (option_mask32 & OPT_REMOVE) {
|
---|
[2725] | 423 | /* modprobe -r */
|
---|
| 424 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 425 | rc = bb_delete_module(m2->modname, O_EXCL);
|
---|
| 426 | if (rc) {
|
---|
| 427 | if (first) {
|
---|
| 428 | bb_error_msg("can't unload module %s: %s",
|
---|
| 429 | humanly_readable_name(m2),
|
---|
| 430 | moderror(rc));
|
---|
| 431 | break;
|
---|
| 432 | }
|
---|
| 433 | } else {
|
---|
| 434 | m2->flags &= ~MODULE_FLAG_LOADED;
|
---|
[821] | 435 | }
|
---|
| 436 | }
|
---|
[2725] | 437 | /* do not error out if *deps* fail to unload */
|
---|
| 438 | first = 0;
|
---|
| 439 | continue;
|
---|
[821] | 440 | }
|
---|
| 441 |
|
---|
[3232] | 442 | options = m2->options;
|
---|
| 443 | m2->options = NULL;
|
---|
| 444 | options = parse_and_add_kcmdline_module_options(options, m2->modname);
|
---|
| 445 | if (m == m2)
|
---|
| 446 | options = gather_options_str(options, G.cmdline_mopts);
|
---|
| 447 |
|
---|
| 448 | if (option_mask32 & OPT_SHOW_DEPS) {
|
---|
| 449 | printf(options ? "insmod %s/%s/%s %s\n"
|
---|
| 450 | : "insmod %s/%s/%s\n",
|
---|
| 451 | CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
|
---|
| 452 | options);
|
---|
| 453 | free(options);
|
---|
| 454 | continue;
|
---|
| 455 | }
|
---|
| 456 |
|
---|
[2725] | 457 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 458 | DBG("%s is already loaded, skipping", fn);
|
---|
[3232] | 459 | free(options);
|
---|
[2725] | 460 | continue;
|
---|
[821] | 461 | }
|
---|
| 462 |
|
---|
[2725] | 463 | rc = bb_init_module(fn, options);
|
---|
| 464 | DBG("loaded %s '%s', rc:%d", fn, options, rc);
|
---|
| 465 | if (rc == EEXIST)
|
---|
| 466 | rc = 0;
|
---|
| 467 | free(options);
|
---|
| 468 | if (rc) {
|
---|
| 469 | bb_error_msg("can't load module %s (%s): %s",
|
---|
| 470 | humanly_readable_name(m2),
|
---|
| 471 | fn,
|
---|
| 472 | moderror(rc)
|
---|
| 473 | );
|
---|
| 474 | break;
|
---|
[821] | 475 | }
|
---|
[2725] | 476 | m2->flags |= MODULE_FLAG_LOADED;
|
---|
[821] | 477 | }
|
---|
[2725] | 478 |
|
---|
| 479 | return rc;
|
---|
[821] | 480 | }
|
---|
| 481 |
|
---|
[2725] | 482 | static void load_modules_dep(void)
|
---|
[1765] | 483 | {
|
---|
[2725] | 484 | struct module_entry *m;
|
---|
| 485 | char *colon, *tokens[2];
|
---|
| 486 | parser_t *p;
|
---|
[1765] | 487 |
|
---|
[2725] | 488 | /* Modprobe does not work at all without modules.dep,
|
---|
| 489 | * even if the full module name is given. Returning error here
|
---|
| 490 | * was making us later confuse user with this message:
|
---|
| 491 | * "module /full/path/to/existing/file/module.ko not found".
|
---|
| 492 | * It's better to die immediately, with good message.
|
---|
| 493 | * xfopen_for_read provides that. */
|
---|
| 494 | p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
[1765] | 495 |
|
---|
[2725] | 496 | while (G.num_unresolved_deps
|
---|
| 497 | && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
|
---|
| 498 | ) {
|
---|
| 499 | colon = last_char_is(tokens[0], ':');
|
---|
| 500 | if (colon == NULL)
|
---|
| 501 | continue;
|
---|
| 502 | *colon = 0;
|
---|
[1765] | 503 |
|
---|
[2725] | 504 | m = get_modentry(tokens[0]);
|
---|
| 505 | if (m == NULL)
|
---|
| 506 | continue;
|
---|
[1765] | 507 |
|
---|
[2725] | 508 | /* Optimization... */
|
---|
| 509 | if ((m->flags & MODULE_FLAG_LOADED)
|
---|
[3232] | 510 | && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
|
---|
[2725] | 511 | ) {
|
---|
| 512 | DBG("skip deps of %s, it's already loaded", tokens[0]);
|
---|
| 513 | continue;
|
---|
[1765] | 514 | }
|
---|
| 515 |
|
---|
[2725] | 516 | m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
|
---|
| 517 | if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
|
---|
| 518 | G.num_unresolved_deps--;
|
---|
| 519 | llist_add_to(&m->deps, xstrdup(tokens[0]));
|
---|
| 520 | if (tokens[1])
|
---|
| 521 | string_to_llist(tokens[1], &m->deps, " \t");
|
---|
| 522 | } else
|
---|
| 523 | DBG("skipping dep line");
|
---|
[1765] | 524 | }
|
---|
[2725] | 525 | config_close(p);
|
---|
[1765] | 526 | }
|
---|
| 527 |
|
---|
[2725] | 528 | int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 529 | int modprobe_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 530 | {
|
---|
[2725] | 531 | int rc;
|
---|
| 532 | unsigned opt;
|
---|
| 533 | struct module_entry *me;
|
---|
[821] | 534 |
|
---|
[3232] | 535 | INIT_G();
|
---|
| 536 |
|
---|
| 537 | IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
|
---|
[2725] | 538 | opt_complementary = MODPROBE_COMPLEMENTARY;
|
---|
| 539 | opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
|
---|
| 540 | argv += optind;
|
---|
[821] | 541 |
|
---|
[2725] | 542 | /* Goto modules location */
|
---|
| 543 | xchdir(CONFIG_DEFAULT_MODULES_DIR);
|
---|
[3232] | 544 | uname(&G.uts);
|
---|
| 545 | xchdir(G.uts.release);
|
---|
[821] | 546 |
|
---|
[3232] | 547 | if (opt & OPT_LIST_ONLY) {
|
---|
| 548 | int i;
|
---|
[2725] | 549 | char name[MODULE_NAME_LEN];
|
---|
| 550 | char *colon, *tokens[2];
|
---|
| 551 | parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
[821] | 552 |
|
---|
[3232] | 553 | for (i = 0; argv[i]; i++)
|
---|
| 554 | replace(argv[i], '-', '_');
|
---|
| 555 |
|
---|
[2725] | 556 | while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
|
---|
| 557 | colon = last_char_is(tokens[0], ':');
|
---|
| 558 | if (!colon)
|
---|
| 559 | continue;
|
---|
| 560 | *colon = '\0';
|
---|
| 561 | filename2modname(tokens[0], name);
|
---|
| 562 | if (!argv[0])
|
---|
| 563 | puts(tokens[0]);
|
---|
| 564 | else {
|
---|
| 565 | for (i = 0; argv[i]; i++) {
|
---|
| 566 | if (fnmatch(argv[i], name, 0) == 0) {
|
---|
| 567 | puts(tokens[0]);
|
---|
| 568 | }
|
---|
[821] | 569 | }
|
---|
| 570 | }
|
---|
| 571 | }
|
---|
[2725] | 572 | return EXIT_SUCCESS;
|
---|
[821] | 573 | }
|
---|
| 574 |
|
---|
[2725] | 575 | /* Yes, for some reason -l ignores -s... */
|
---|
| 576 | if (opt & INSMOD_OPT_SYSLOG)
|
---|
| 577 | logmode = LOGMODE_SYSLOG;
|
---|
[821] | 578 |
|
---|
[2725] | 579 | if (!argv[0]) {
|
---|
[3232] | 580 | if (opt & OPT_REMOVE) {
|
---|
[2725] | 581 | /* "modprobe -r" (w/o params).
|
---|
| 582 | * "If name is NULL, all unused modules marked
|
---|
| 583 | * autoclean will be removed".
|
---|
| 584 | */
|
---|
| 585 | if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
|
---|
| 586 | bb_perror_msg_and_die("rmmod");
|
---|
[821] | 587 | }
|
---|
[2725] | 588 | return EXIT_SUCCESS;
|
---|
[821] | 589 | }
|
---|
| 590 |
|
---|
[2725] | 591 | /* Retrieve module names of already loaded modules */
|
---|
| 592 | {
|
---|
| 593 | char *s;
|
---|
| 594 | parser_t *parser = config_open2("/proc/modules", fopen_for_read);
|
---|
| 595 | while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
|
---|
| 596 | get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
|
---|
| 597 | config_close(parser);
|
---|
[821] | 598 | }
|
---|
| 599 |
|
---|
[3232] | 600 | if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
|
---|
[2725] | 601 | /* Each argument is a module name */
|
---|
| 602 | do {
|
---|
| 603 | DBG("adding module %s", *argv);
|
---|
| 604 | add_probe(*argv++);
|
---|
| 605 | } while (*argv);
|
---|
| 606 | } else {
|
---|
| 607 | /* First argument is module name, rest are parameters */
|
---|
| 608 | DBG("probing just module %s", *argv);
|
---|
| 609 | add_probe(argv[0]);
|
---|
[3232] | 610 | G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
|
---|
[2725] | 611 | }
|
---|
[821] | 612 |
|
---|
[2725] | 613 | /* Happens if all requested modules are already loaded */
|
---|
| 614 | if (G.probes == NULL)
|
---|
| 615 | return EXIT_SUCCESS;
|
---|
[821] | 616 |
|
---|
[2725] | 617 | read_config("/etc/modprobe.conf");
|
---|
| 618 | read_config("/etc/modprobe.d");
|
---|
| 619 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
|
---|
| 620 | read_config("modules.symbols");
|
---|
| 621 | load_modules_dep();
|
---|
| 622 | if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
|
---|
| 623 | read_config("modules.alias");
|
---|
| 624 | load_modules_dep();
|
---|
[821] | 625 | }
|
---|
| 626 |
|
---|
[2725] | 627 | rc = 0;
|
---|
| 628 | while ((me = llist_pop(&G.probes)) != NULL) {
|
---|
| 629 | if (me->realnames == NULL) {
|
---|
| 630 | DBG("probing by module name");
|
---|
| 631 | /* This is not an alias. Literal names are blacklisted
|
---|
| 632 | * only if '-b' is given.
|
---|
[902] | 633 | */
|
---|
[3232] | 634 | if (!(opt & OPT_BLACKLIST)
|
---|
[2725] | 635 | || !(me->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 636 | ) {
|
---|
| 637 | rc |= do_modprobe(me);
|
---|
| 638 | }
|
---|
| 639 | continue;
|
---|
[902] | 640 | }
|
---|
[821] | 641 |
|
---|
[2725] | 642 | /* Probe all real names for the alias */
|
---|
| 643 | do {
|
---|
| 644 | char *realname = llist_pop(&me->realnames);
|
---|
| 645 | struct module_entry *m2;
|
---|
[821] | 646 |
|
---|
[2725] | 647 | DBG("probing alias %s by realname %s", me->modname, realname);
|
---|
| 648 | m2 = get_or_add_modentry(realname);
|
---|
| 649 | if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 650 | && (!(m2->flags & MODULE_FLAG_LOADED)
|
---|
[3232] | 651 | || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
|
---|
[2725] | 652 | ) {
|
---|
| 653 | //TODO: we can pass "me" as 2nd param to do_modprobe,
|
---|
| 654 | //and make do_modprobe emit more meaningful error messages
|
---|
| 655 | //with alias name included, not just module name alias resolves to.
|
---|
| 656 | rc |= do_modprobe(m2);
|
---|
[821] | 657 | }
|
---|
[2725] | 658 | free(realname);
|
---|
| 659 | } while (me->realnames != NULL);
|
---|
[821] | 660 | }
|
---|
| 661 |
|
---|
[2725] | 662 | return (rc != 0);
|
---|
[821] | 663 | }
|
---|