* Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
* Copyright (c) 2008 Vladimir Dronnikov
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//applet:IF_MODPROBE(APPLET(modprobe, _BB_DIR_SBIN, _BB_SUID_DROP))
+
+//usage:#if !ENABLE_MODPROBE_SMALL
+//usage:#define modprobe_notes_usage
+//usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
+//usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
+//usage: "pass each module it loads.\n"
+//usage: "\n"
+//usage: "The configuration file is searched (in this order):\n"
+//usage: "\n"
+//usage: " /etc/modprobe.conf (2.6 only)\n"
+//usage: " /etc/modules.conf\n"
+//usage: " /etc/conf.modules (deprecated)\n"
+//usage: "\n"
+//usage: "They all have the same syntax (see below). If none is present, it is\n"
+//usage: "_not_ an error; each loaded module is then expected to load without\n"
+//usage: "options. Once a file is found, the others are tested for.\n"
+//usage: "\n"
+//usage: "/etc/modules.conf entry format:\n"
+//usage: "\n"
+//usage: " alias <alias_name> <mod_name>\n"
+//usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
+//usage: " It makes sense if your mod_name is long, or you want a more representative\n"
+//usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
+//usage: " This makes it also possible to use a different set of options (below) for\n"
+//usage: " the module and the alias.\n"
+//usage: " A module can be aliased more than once.\n"
+//usage: "\n"
+//usage: " options <mod_name|alias_name> <symbol=value...>\n"
+//usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
+//usage: " the \"symbol=value\" pairs as option to that module.\n"
+//usage: "\n"
+//usage: "Sample /etc/modules.conf file:\n"
+//usage: "\n"
+//usage: " options tulip irq=3\n"
+//usage: " alias tulip tulip2\n"
+//usage: " options tulip2 irq=4 io=0x308\n"
+//usage: "\n"
+//usage: "Other functionality offered by 'classic' modprobe is not available in\n"
+//usage: "this implementation.\n"
+//usage: "\n"
+//usage: "If module options are present both in the config file, and on the command line,\n"
+//usage: "then the options from the command line will be passed to the module _after_\n"
+//usage: "the options from the config file. That way, you can have defaults in the config\n"
+//usage: "file, and override them for a specific usage from the command line.\n"
+//usage:#define modprobe_example_usage
+//usage: "(with the above /etc/modules.conf):\n\n"
+//usage: "$ modprobe tulip\n"
+//usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
+//usage: "$ modprobe tulip irq=5\n"
+//usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
+//usage: "$ modprobe tulip2\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
+//usage: " which are the default for alias 'tulip2'\n\n"
+//usage: "$ modprobe tulip2 irq=8\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
+//usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
+//usage: " from the command line\n\n"
+//usage: "$ modprobe tulip2 irq=2 io=0x210\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
+//usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
+//usage: " from the command line\n"
+//usage:
+//usage:#define modprobe_trivial_usage
+//usage: "[-alrqvs"
+//usage: IF_FEATURE_MODPROBE_BLACKLIST("b")
+//usage: "] MODULE [symbol=value]..."
+//usage:#define modprobe_full_usage "\n\n"
+//usage: "Options:"
+//usage: "\n -a Load multiple MODULEs"
+//usage: "\n -l List (MODULE is a pattern)"
+//usage: "\n -r Remove MODULE (stacks) or do autoclean"
+//usage: "\n -q Quiet"
+//usage: "\n -v Verbose"
+//usage: "\n -s Log to syslog"
+//usage: IF_FEATURE_MODPROBE_BLACKLIST(
+//usage: "\n -b Apply blacklist to module names too"
+//usage: )
+//usage:#endif /* !ENABLE_MODPROBE_SMALL */
+
#include "libbb.h"
#include "modutils.h"
#include <sys/utsname.h>
#include <fnmatch.h>
-//#define DBG(...) bb_error_msg(__VA_ARGS__)
+//#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
#define DBG(...) ((void)0)
-#define MODULE_FLAG_LOADED 0x0001
-#define MODULE_FLAG_NEED_DEPS 0x0002
+/* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
+ * we expect the full dependency list to be specified in modules.dep.
+ * Older versions would only export the direct dependency list.
+ */
+
+/* Note that usage text doesn't document various 2.4 options
+ * we pull in through INSMOD_OPTS define */
+
+#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--ar:a--lr:r--al"
+#define MODPROBE_OPTS "alr" IF_FEATURE_MODPROBE_BLACKLIST("b")
+//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
+//#define MODPROBE_OPTS "acd:lnrt:C:" IF_FEATURE_MODPROBE_BLACKLIST("b")
+enum {
+ MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
+ //MODPROBE_OPT_DUMP_ONLY= (INSMOD_OPT_UNUSED << x), /* c */
+ //MODPROBE_OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
+ MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
+ //MODPROBE_OPT_SHOW_ONLY= (INSMOD_OPT_UNUSED << x), /* n */
+ MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
+ //MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
+ //MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
+ //MODPROBE_OPT_CONFIGFILE=(INSMOD_OPT_UNUSED << x), /* C */
+ MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
+};
+
+#define MODULE_FLAG_LOADED 0x0001
+#define MODULE_FLAG_NEED_DEPS 0x0002
/* "was seen in modules.dep": */
-#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
-#define MODULE_FLAG_BLACKLISTED 0x0008
+#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
+#define MODULE_FLAG_BLACKLISTED 0x0008
struct module_entry { /* I'll call it ME. */
unsigned flags;
llist_t *deps; /* strings. modules we depend on */
};
-#define MODPROBE_OPTS "acdlnrt:VC:" USE_FEATURE_MODPROBE_BLACKLIST("b")
-enum {
- MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
- MODPROBE_OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << 1), /* c */
- MODPROBE_OPT_D = (INSMOD_OPT_UNUSED << 2), /* d */
- MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 3), /* l */
- MODPROBE_OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << 4), /* n */
- MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 5), /* r */
- MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << 6), /* t */
- MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << 7), /* V */
- MODPROBE_OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << 8), /* C */
- MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 9) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
-};
-
struct globals {
llist_t *db; /* MEs of all modules ever seen (caching for speed) */
llist_t *probes; /* MEs of module(s) requested on cmdline */
int num_unresolved_deps;
/* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
smallint need_symbols;
-};
+} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
#define INIT_G() do { } while (0)
static char *gather_options_str(char *opts, const char *append)
{
/* Speed-optimized. We call gather_options_str many times. */
- if (opts == NULL) {
- opts = xstrdup(append);
- } else {
- int optlen = strlen(opts);
- opts = xrealloc(opts, optlen + strlen(append) + 2);
- sprintf(opts + optlen, " %s", append);
+ if (append) {
+ if (opts == NULL) {
+ opts = xstrdup(append);
+ } else {
+ int optlen = strlen(opts);
+ opts = xrealloc(opts, optlen + strlen(append) + 2);
+ sprintf(opts + optlen, " %s", append);
+ }
}
return opts;
}
struct module_entry *m;
m = get_or_add_modentry(name);
- if (m->flags & MODULE_FLAG_LOADED) {
+ if (!(option_mask32 & MODPROBE_OPT_REMOVE)
+ && (m->flags & MODULE_FLAG_LOADED)
+ ) {
DBG("skipping %s, it is already loaded", name);
return;
}
+ DBG("queuing %s", name);
m->probed_name = name;
m->flags |= MODULE_FLAG_NEED_DEPS;
llist_add_to_end(&G.probes, m);
{
char *tokens[3];
parser_t *p;
- struct module_entry *m;
+ struct module_entry *m;
int rc = TRUE;
if (bb_basename(filename)[0] == '.')
}
}
config_close(p);
-error:
+ error:
return rc;
}
config_file_action, NULL, NULL, 1);
}
+static const char *humanly_readable_name(struct module_entry *m)
+{
+ /* probed_name may be NULL. modname always exists. */
+ return m->probed_name ? m->probed_name : m->modname;
+}
+
+static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
+{
+ char *kcmdline_buf;
+ char *kcmdline;
+ char *kptr;
+ int len;
+
+ kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
+ if (!kcmdline_buf)
+ return options;
+
+ kcmdline = kcmdline_buf;
+ len = strlen(modulename);
+ while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
+ if (strncmp(modulename, kptr, len) != 0)
+ continue;
+ kptr += len;
+ if (*kptr != '.')
+ continue;
+ /* It is "modulename.xxxx" */
+ kptr++;
+ if (strchr(kptr, '=') != NULL) {
+ /* It is "modulename.opt=[val]" */
+ options = gather_options_str(options, kptr);
+ }
+ }
+ free(kcmdline_buf);
+
+ return options;
+}
+
+/* Return: similar to bb_init_module:
+ * 0 on success,
+ * -errno on open/read error,
+ * errno on init_module() error
+ */
+/* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
+ * not deleted ones (those are still listed in modules.dep).
+ * module-init-tools version 3.4:
+ * # modprobe bogus
+ * FATAL: Module bogus not found. [exitcode 1]
+ * # modprobe -q bogus [silent, exitcode still 1]
+ * but:
+ * # rm kernel/drivers/net/dummy.ko
+ * # modprobe -q dummy
+ * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
+ * [exitcode 1]
+ */
static int do_modprobe(struct module_entry *m)
{
- struct module_entry *m2;
+ struct module_entry *m2 = m2; /* for compiler */
char *fn, *options;
- int rc = -1;
+ int rc, first;
+ llist_t *l;
if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
- DBG("skipping %s, not found in modules.dep", m->modname);
+ if (!(option_mask32 & INSMOD_OPT_SILENT))
+ bb_error_msg("module %s not found in modules.dep",
+ humanly_readable_name(m));
return -ENOENT;
}
DBG("do_modprob'ing %s", m->modname);
if (!(option_mask32 & MODPROBE_OPT_REMOVE))
m->deps = llist_rev(m->deps);
+ for (l = m->deps; l != NULL; l = l->link)
+ DBG("dep: %s", l->data);
+
+ first = 1;
rc = 0;
- while (m->deps && rc == 0) {
- fn = llist_pop(&m->deps);
+ while (m->deps) {
+ rc = 0;
+ fn = llist_pop(&m->deps); /* we leak it */
m2 = get_or_add_modentry(fn);
+
if (option_mask32 & MODPROBE_OPT_REMOVE) {
- if (bb_delete_module(m->modname, O_EXCL) != 0)
- rc = errno;
- } else if (!(m2->flags & MODULE_FLAG_LOADED)) {
- options = m2->options;
- m2->options = NULL;
- if (m == m2)
- options = gather_options_str(options, G.cmdline_mopts);
- rc = bb_init_module(fn, options);
- DBG("loaded %s '%s', rc:%d", fn, options, rc);
- if (rc == 0)
- m2->flags |= MODULE_FLAG_LOADED;
- free(options);
- } else {
- DBG("%s is already loaded, skipping", fn);
+ /* modprobe -r */
+ if (m2->flags & MODULE_FLAG_LOADED) {
+ rc = bb_delete_module(m2->modname, O_EXCL);
+ if (rc) {
+ if (first) {
+ bb_error_msg("can't unload module %s: %s",
+ humanly_readable_name(m2),
+ moderror(rc));
+ break;
+ }
+ } else {
+ m2->flags &= ~MODULE_FLAG_LOADED;
+ }
+ }
+ /* do not error out if *deps* fail to unload */
+ first = 0;
+ continue;
}
- free(fn);
- }
+ if (m2->flags & MODULE_FLAG_LOADED) {
+ DBG("%s is already loaded, skipping", fn);
+ continue;
+ }
-//FIXME: what if rc < 0?
- if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT)) {
- bb_error_msg("failed to %sload module %s: %s",
- (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "",
- m->probed_name ? m->probed_name : m->modname,
- moderror(rc)
- );
+ options = m2->options;
+ m2->options = NULL;
+ options = parse_and_add_kcmdline_module_options(options, m2->modname);
+ if (m == m2)
+ options = gather_options_str(options, G.cmdline_mopts);
+ rc = bb_init_module(fn, options);
+ DBG("loaded %s '%s', rc:%d", fn, options, rc);
+ if (rc == EEXIST)
+ rc = 0;
+ free(options);
+ if (rc) {
+ bb_error_msg("can't load module %s (%s): %s",
+ humanly_readable_name(m2),
+ fn,
+ moderror(rc)
+ );
+ break;
+ }
+ m2->flags |= MODULE_FLAG_LOADED;
}
return rc;
char *colon, *tokens[2];
parser_t *p;
- /* Modprobe does not work at all without modprobe.dep,
+ /* Modprobe does not work at all without modules.dep,
* even if the full module name is given. Returning error here
* was making us later confuse user with this message:
* "module /full/path/to/existing/file/module.ko not found".
G.num_unresolved_deps--;
llist_add_to(&m->deps, xstrdup(tokens[0]));
if (tokens[1])
- string_to_llist(tokens[1], &m->deps, " ");
- }
+ string_to_llist(tokens[1], &m->deps, " \t");
+ } else
+ DBG("skipping dep line");
}
config_close(p);
}
unsigned opt;
struct module_entry *me;
- opt_complementary = "q-v:v-q";
- opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS, NULL, NULL);
+ opt_complementary = MODPROBE_COMPLEMENTARY;
+ opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
argv += optind;
- if (opt & (MODPROBE_OPT_DUMP_ONLY | MODPROBE_OPT_LIST_ONLY |
- MODPROBE_OPT_SHOW_ONLY))
- bb_error_msg_and_die("not supported");
+ /* Goto modules location */
+ xchdir(CONFIG_DEFAULT_MODULES_DIR);
+ uname(&uts);
+ xchdir(uts.release);
+
+ if (opt & MODPROBE_OPT_LIST_ONLY) {
+ char name[MODULE_NAME_LEN];
+ char *colon, *tokens[2];
+ parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
+
+ while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
+ colon = last_char_is(tokens[0], ':');
+ if (!colon)
+ continue;
+ *colon = '\0';
+ filename2modname(tokens[0], name);
+ if (!argv[0])
+ puts(tokens[0]);
+ else {
+ int i;
+ for (i = 0; argv[i]; i++) {
+ if (fnmatch(argv[i], name, 0) == 0) {
+ puts(tokens[0]);
+ }
+ }
+ }
+ }
+ return EXIT_SUCCESS;
+ }
+
+ /* Yes, for some reason -l ignores -s... */
+ if (opt & INSMOD_OPT_SYSLOG)
+ logmode = LOGMODE_SYSLOG;
if (!argv[0]) {
if (opt & MODPROBE_OPT_REMOVE) {
* "If name is NULL, all unused modules marked
* autoclean will be removed".
*/
- if (bb_delete_module(NULL, O_NONBLOCK|O_EXCL) != 0)
+ if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
bb_perror_msg_and_die("rmmod");
}
return EXIT_SUCCESS;
}
- /* Goto modules location */
- xchdir(CONFIG_DEFAULT_MODULES_DIR);
- uname(&uts);
- xchdir(uts.release);
-
/* Retrieve module names of already loaded modules */
{
char *s;
config_close(parser);
}
- if (opt & MODPROBE_OPT_INSERT_ALL) {
+ if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) {
/* Each argument is a module name */
do {
+ DBG("adding module %s", *argv);
add_probe(*argv++);
} while (*argv);
} else {
/* First argument is module name, rest are parameters */
+ DBG("probing just module %s", *argv);
add_probe(argv[0]);
G.cmdline_mopts = parse_cmdline_module_options(argv);
}
load_modules_dep();
}
+ rc = 0;
while ((me = llist_pop(&G.probes)) != NULL) {
if (me->realnames == NULL) {
+ DBG("probing by module name");
/* This is not an alias. Literal names are blacklisted
* only if '-b' is given.
*/
if (!(opt & MODPROBE_OPT_BLACKLIST)
|| !(me->flags & MODULE_FLAG_BLACKLISTED)
) {
- rc = do_modprobe(me);
-//FIXME: what if rc > 0?
- if (rc < 0 && !(opt & INSMOD_OPT_SILENT))
- bb_error_msg("module %s not found",
- me->probed_name);
+ rc |= do_modprobe(me);
}
- } else {
- /* Probe all realnames */
- do {
- char *realname = llist_pop(&me->realnames);
- struct module_entry *m2;
-
- DBG("probing %s by realname %s", me->modname, realname);
- m2 = get_or_add_modentry(realname);
- if (!(m2->flags & MODULE_FLAG_BLACKLISTED))
- do_modprobe(m2);
-//FIXME: error check?
- free(realname);
- } while (me->realnames != NULL);
+ continue;
}
+
+ /* Probe all real names for the alias */
+ do {
+ char *realname = llist_pop(&me->realnames);
+ struct module_entry *m2;
+
+ DBG("probing alias %s by realname %s", me->modname, realname);
+ m2 = get_or_add_modentry(realname);
+ if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
+ && (!(m2->flags & MODULE_FLAG_LOADED)
+ || (opt & MODPROBE_OPT_REMOVE))
+ ) {
+//TODO: we can pass "me" as 2nd param to do_modprobe,
+//and make do_modprobe emit more meaningful error messages
+//with alias name included, not just module name alias resolves to.
+ rc |= do_modprobe(m2);
+ }
+ free(realname);
+ } while (me->realnames != NULL);
}
- return EXIT_SUCCESS;
+ return (rc != 0);
}
projects / oweals / busybox.git / blobdiff