* Copyright (c) 2008 Vladimir Dronnikov
* Copyright (c) 2008 Bernhard Reutner-Fischer (initial depmod code)
*
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-#include "libbb.h"
+/* modprobe-small configs are defined in Config.src to ensure better
+ * "make config" order */
+
+//applet:IF_LSMOD( IF_MODPROBE_SMALL(APPLET(lsmod, BB_DIR_SBIN, BB_SUID_DROP)))
+//applet:IF_MODPROBE(IF_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP)))
+// APPLET_ODDNAME:name main location suid_type help
+//applet:IF_DEPMOD(IF_MODPROBE_SMALL(APPLET_ODDNAME(depmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, depmod)))
+//applet:IF_INSMOD(IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, insmod)))
+//applet:IF_RMMOD( IF_MODPROBE_SMALL(APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod)))
+
+//kbuild:lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o
+#include "libbb.h"
+/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h> /* uname() */
#include <fnmatch.h>
+#include <sys/syscall.h>
-extern int init_module(void *module, unsigned long len, const char *options);
-extern int delete_module(const char *module, unsigned flags);
-extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
+#define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
+#define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
+#ifdef __NR_finit_module
+# define finit_module(fd, uargs, flags) syscall(__NR_finit_module, fd, uargs, flags)
+#endif
+/* linux/include/linux/module.h has limit of 64 chars on module names */
+#undef MODULE_NAME_LEN
+#define MODULE_NAME_LEN 64
-#define dbg1_error_msg(...) ((void)0)
-#define dbg2_error_msg(...) ((void)0)
-//#define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__)
-//#define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__)
+#if 1
+# define dbg1_error_msg(...) ((void)0)
+# define dbg2_error_msg(...) ((void)0)
+#else
+# define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__)
+# define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__)
+#endif
#define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb"
+//usage:#if ENABLE_MODPROBE_SMALL
+
+//usage:#define lsmod_trivial_usage
+//usage: ""
+//usage:#define lsmod_full_usage "\n\n"
+//usage: "List loaded kernel modules"
+
+//usage:#endif
+
+#if ENABLE_LSMOD
+int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+ xprint_and_close_file(xfopen_for_read("/proc/modules"));
+ return EXIT_SUCCESS;
+}
+#endif
+
+/* Num of applets that use modprobe_main() entry point. */
+/* lsmod is not here. */
+#define MOD_APPLET_CNT (ENABLE_MODPROBE + ENABLE_DEPMOD + ENABLE_INSMOD + ENABLE_RMMOD)
+
+/* Do not bother if MODPROBE_SMALL=y but no applets selected. */
+/* The rest of the file is in this if block. */
+#if MOD_APPLET_CNT > 0
+
+#define ONLY_APPLET (MOD_APPLET_CNT == 1)
+#define is_modprobe (ENABLE_MODPROBE && (ONLY_APPLET || applet_name[0] == 'm'))
+#define is_depmod (ENABLE_DEPMOD && (ONLY_APPLET || applet_name[0] == 'd'))
+#define is_insmod (ENABLE_INSMOD && (ONLY_APPLET || applet_name[0] == 'i'))
+#define is_rmmod (ENABLE_RMMOD && (ONLY_APPLET || applet_name[0] == 'r'))
+
enum {
+ DEPMOD_OPT_n = (1 << 0), /* dry-run, print to stdout */
OPT_q = (1 << 0), /* be quiet */
OPT_r = (1 << 1), /* module removal instead of loading */
};
char *pathname;
char *aliases;
char *deps;
+ smallint open_read_failed;
} module_info;
/*
char *module_load_options;
smallint dep_bb_seen;
smallint wrote_dep_bb_ok;
- int module_count;
+ unsigned module_count;
int module_found_idx;
- int stringbuf_idx;
- char stringbuf[32 * 1024]; /* some modules have lots of stuff */
+ unsigned stringbuf_idx;
+ unsigned stringbuf_size;
+ char *stringbuf; /* some modules have lots of stuff */
/* for example, drivers/media/video/saa7134/saa7134.ko */
+ /* therefore having a fixed biggish buffer is not wise */
};
#define G (*ptr_to_globals)
#define modinfo (G.modinfo )
#define module_found_idx (G.module_found_idx )
#define module_load_options (G.module_load_options)
#define stringbuf_idx (G.stringbuf_idx )
+#define stringbuf_size (G.stringbuf_size )
#define stringbuf (G.stringbuf )
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
} while (0)
+static void append(const char *s)
+{
+ unsigned len = strlen(s);
+ if (stringbuf_idx + len + 15 > stringbuf_size) {
+ stringbuf_size = stringbuf_idx + len + 127;
+ dbg2_error_msg("grow stringbuf to %u", stringbuf_size);
+ stringbuf = xrealloc(stringbuf, stringbuf_size);
+ }
+ memcpy(stringbuf + stringbuf_idx, s, len);
+ stringbuf_idx += len;
+}
static void appendc(char c)
{
- if (stringbuf_idx < sizeof(stringbuf))
- stringbuf[stringbuf_idx++] = c;
+ /* We appendc() only after append(), + 15 trick in append()
+ * makes it unnecessary to check for overflow here */
+ stringbuf[stringbuf_idx++] = c;
}
static void bksp(void)
stringbuf_idx--;
}
-static void append(const char *s)
-{
- size_t len = strlen(s);
- if (stringbuf_idx + len < sizeof(stringbuf)) {
- memcpy(stringbuf + stringbuf_idx, s, len);
- stringbuf_idx += len;
- }
-}
-
static void reset_stringbuf(void)
{
stringbuf_idx = 0;
static char* copy_stringbuf(void)
{
- char *copy = xmalloc(stringbuf_idx);
+ char *copy = xzalloc(stringbuf_idx + 1); /* terminating NUL */
return memcpy(copy, stringbuf, stringbuf_idx);
}
static char* find_keyword(char *ptr, size_t len, const char *word)
{
- int wlen;
-
if (!ptr) /* happens if xmalloc_open_zipped_read_close cannot read it */
return NULL;
- wlen = strlen(word);
- len -= wlen - 1;
+ len -= strlen(word) - 1;
while ((ssize_t)len > 0) {
char *old = ptr;
+ char *after_word;
+
/* search for the first char in word */
- ptr = memchr(ptr, *word, len);
- if (ptr == NULL) /* no occurance left, done */
+ ptr = memchr(ptr, word[0], len);
+ if (ptr == NULL) /* no occurrence left, done */
break;
- if (strncmp(ptr, word, wlen) == 0)
- return ptr + wlen; /* found, return ptr past it */
+ after_word = is_prefixed_with(ptr, word);
+ if (after_word)
+ return after_word; /* found, return ptr past it */
++ptr;
len -= (ptr - old);
}
}
}
+static char *filename2modname(const char *filename, char *modname)
+{
+ int i;
+ const char *from;
+
+ // Disabled since otherwise "modprobe dir/name" would work
+ // as if it is "modprobe name". It is unclear why
+ // 'basenamization' was here in the first place.
+ //from = bb_get_last_path_component_nostrip(filename);
+ from = filename;
+ for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
+ modname[i] = (from[i] == '-') ? '_' : from[i];
+ modname[i] = '\0';
+
+ return modname;
+}
+
+static int pathname_matches_modname(const char *pathname, const char *modname)
+{
+ int r;
+ char name[MODULE_NAME_LEN];
+ filename2modname(bb_get_last_path_component_nostrip(pathname), name);
+ r = (strcmp(name, modname) == 0);
+ return r;
+}
+
/* Take "word word", return malloced "word",NUL,"word",NUL,NUL */
static char* str_2_list(const char *str)
{
int r;
size_t len = MAXINT(ssize_t);
char *module_image;
+
+ if (!options)
+ options = "";
+
dbg1_error_msg("load_module('%s','%s')", fname, options);
- module_image = xmalloc_open_zipped_read_close(fname, &len);
- r = (!module_image || init_module(module_image, len, options ? options : "") != 0);
- free(module_image);
+ /*
+ * First we try finit_module if available. Some kernels are configured
+ * to only allow loading of modules off of secure storage (like a read-
+ * only rootfs) which needs the finit_module call. If it fails, we fall
+ * back to normal module loading to support compressed modules.
+ */
+ r = 1;
+# ifdef __NR_finit_module
+ {
+ int fd = open(fname, O_RDONLY | O_CLOEXEC);
+ if (fd >= 0) {
+ r = finit_module(fd, options, 0) != 0;
+ close(fd);
+ }
+ }
+# endif
+ if (r != 0) {
+ module_image = xmalloc_open_zipped_read_close(fname, &len);
+ r = (!module_image || init_module(module_image, len, options) != 0);
+ free(module_image);
+ }
+
dbg1_error_msg("load_module:%d", r);
return r; /* 0 = success */
#else
#endif
}
-static void parse_module(module_info *info, const char *pathname)
+/* Returns !0 if open/read was unsuccessful */
+static int parse_module(module_info *info, const char *pathname)
{
char *module_image;
char *ptr;
dbg1_error_msg("parse_module('%s')", pathname);
/* Read (possibly compressed) module */
+ errno = 0;
len = 64 * 1024 * 1024; /* 64 Mb at most */
module_image = xmalloc_open_zipped_read_close(pathname, &len);
+ /* module_image == NULL is ok here, find_keyword handles it */
//TODO: optimize redundant module body reads
/* "alias1 symbol:sym1 alias2 symbol:sym2" */
reset_stringbuf();
pos = 0;
while (1) {
+ unsigned start = stringbuf_idx;
ptr = find_keyword(module_image + pos, len - pos, "alias=");
if (!ptr) {
ptr = find_keyword(module_image + pos, len - pos, "__ksymtab_");
}
append(ptr);
appendc(' ');
+ /*
+ * Don't add redundant aliases, such as:
+ * libcrc32c.ko symbol:crc32c symbol:crc32c
+ */
+ if (start) { /* "if we aren't the first alias" */
+ char *found, *last;
+ stringbuf[stringbuf_idx] = '\0';
+ last = stringbuf + start;
+ /*
+ * String at last-1 is " symbol:crc32c "
+ * (with both leading and trailing spaces).
+ */
+ if (strncmp(stringbuf, last, stringbuf_idx - start) == 0)
+ /* First alias matches us */
+ found = stringbuf;
+ else
+ /* Does any other alias match? */
+ found = strstr(stringbuf, last-1);
+ if (found < last-1) {
+ /* There is absolutely the same string before us */
+ dbg2_error_msg("redundant:'%s'", last);
+ stringbuf_idx = start;
+ goto skip;
+ }
+ }
skip:
pos = (ptr - module_image);
}
bksp(); /* remove last ' ' */
- appendc('\0');
info->aliases = copy_stringbuf();
+ replace(info->aliases, '-', '_');
/* "dependency1 depandency2" */
reset_stringbuf();
dbg2_error_msg("dep:'%s'", ptr);
append(ptr);
}
- appendc('\0');
+ free(module_image);
info->deps = copy_stringbuf();
- free(module_image);
-}
-
-static int pathname_matches_modname(const char *pathname, const char *modname)
-{
- const char *fname = bb_get_last_path_component_nostrip(pathname);
- const char *suffix = strrstr(fname, ".ko");
-//TODO: can do without malloc?
- char *name = xstrndup(fname, suffix - fname);
- int r;
- replace(name, '-', '_');
- r = (strcmp(name, modname) == 0);
- free(name);
- return r;
+ info->open_read_failed = (module_image == NULL);
+ return info->open_read_failed;
}
static FAST_FUNC int fileAction(const char *pathname,
{
int cur;
const char *fname;
+ bool is_remove = (ENABLE_RMMOD && ONLY_APPLET)
+ || ((ENABLE_RMMOD || ENABLE_MODPROBE) && (option_mask32 & OPT_r));
pathname += 2; /* skip "./" */
fname = bb_get_last_path_component_nostrip(pathname);
dbg1_error_msg("'%s' module name matches", pathname);
module_found_idx = cur;
- parse_module(&modinfo[cur], pathname);
+ if (parse_module(&modinfo[cur], pathname) != 0)
+ return TRUE; /* failed to open/read it, no point in trying loading */
- if (!(option_mask32 & OPT_r)) {
+ if (!is_remove) {
if (load_module(pathname, module_load_options) == 0) {
/* Load was successful, there is nothing else to do.
* This can happen ONLY for "top-level" module load,
- * not a dep, because deps dont do dirscan. */
+ * not a dep, because deps don't do dirscan. */
exit(EXIT_SUCCESS);
}
}
while ((line = xmalloc_fgetline(fp)) != NULL) {
char* space;
+ char* linebuf;
int cur;
if (!line[0]) {
if (*space)
*space++ = '\0';
modinfo[cur].aliases = space;
- modinfo[cur].deps = xmalloc_fgetline(fp) ? : xzalloc(1);
+ linebuf = xmalloc_fgetline(fp);
+ modinfo[cur].deps = linebuf ? linebuf : xzalloc(1);
if (modinfo[cur].deps[0]) {
/* deps are not "", so next line must be empty */
line = xmalloc_fgetline(fp);
int fd;
/* depmod -n: write result to stdout */
- if (applet_name[0] == 'd' && (option_mask32 & 1))
+ if (is_depmod && (option_mask32 & DEPMOD_OPT_n))
return STDOUT_FILENO;
fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644);
FILE *fp;
/* We want good error reporting. fdprintf is not good enough. */
- fp = fdopen(fd, "w");
- if (!fp) {
- close(fd);
- goto err;
- }
+ fp = xfdopen_for_write(fd);
i = 0;
while (modinfo[i].pathname) {
fprintf(fp, "%s%s%s\n" "%s%s\n",
if (rename(DEPFILE_BB".new", DEPFILE_BB) != 0) {
err:
- bb_perror_msg("can't create %s", DEPFILE_BB);
+ bb_perror_msg("can't create '%s'", DEPFILE_BB);
unlink(DEPFILE_BB".new");
} else {
ok:
}
}
-static module_info* find_alias(const char *alias)
+static module_info** find_alias(const char *alias)
{
int i;
int dep_bb_fd;
- module_info *result;
+ int infoidx;
+ module_info **infovec;
dbg1_error_msg("find_alias('%s')", alias);
try_again:
if (!modinfo[i].aliases) {
parse_module(&modinfo[i], modinfo[i].pathname);
}
- return &modinfo[i];
+ infovec = xzalloc(2 * sizeof(infovec[0]));
+ infovec[0] = &modinfo[i];
+ return infovec;
}
i++;
}
/* Scan all module bodies, extract modinfo (it contains aliases) */
i = 0;
- result = NULL;
+ infoidx = 0;
+ infovec = NULL;
while (modinfo[i].pathname) {
char *desc, *s;
if (!modinfo[i].aliases) {
parse_module(&modinfo[i], modinfo[i].pathname);
}
- if (result) {
- i++;
- continue;
- }
/* "alias1 symbol:sym1 alias2 symbol:sym2" */
desc = str_2_list(modinfo[i].aliases);
/* Does matching substring exist? */
if (fnmatch(s, alias, 0) == 0) {
dbg1_error_msg("found alias '%s' in module '%s'",
alias, modinfo[i].pathname);
- result = &modinfo[i];
+ infovec = xrealloc_vector(infovec, 1, infoidx);
+ infovec[infoidx++] = &modinfo[i];
break;
}
}
free(desc);
- if (result && dep_bb_fd < 0)
- return result;
i++;
}
write_out_dep_bb(dep_bb_fd);
}
- dbg1_error_msg("find_alias '%s' returns %p", alias, result);
- return result;
+ dbg1_error_msg("find_alias '%s' returns %d results", alias, infoidx);
+ return infovec;
}
#if ENABLE_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED
// TODO: open only once, invent config_rewind()
static int already_loaded(const char *name)
{
- int ret = 0;
- char *s;
- parser_t *parser = config_open2("/proc/modules", xfopen_for_read);
- while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
- if (strcmp(s, name) == 0) {
- ret = 1;
- break;
+ int ret;
+ char *line;
+ FILE *fp;
+
+ ret = 5 * 2;
+ again:
+ fp = fopen_for_read("/proc/modules");
+ if (!fp)
+ return 0;
+ while ((line = xmalloc_fgetline(fp)) != NULL) {
+ char *live;
+ char *after_name;
+
+ // Examples from kernel 3.14.6:
+ //pcspkr 12718 0 - Live 0xffffffffa017e000
+ //snd_timer 28690 2 snd_seq,snd_pcm, Live 0xffffffffa025e000
+ //i915 801405 2 - Live 0xffffffffa0096000
+ after_name = is_prefixed_with(line, name);
+ if (!after_name || *after_name != ' ') {
+ free(line);
+ continue;
+ }
+ live = strstr(line, " Live");
+ free(line);
+ if (!live) {
+ /* State can be Unloading, Loading, or Live.
+ * modprobe must not return prematurely if we see "Loading":
+ * it can cause further programs to assume load completed,
+ * but it did not (yet)!
+ * Wait up to 5*20 ms for it to resolve.
+ */
+ ret -= 2;
+ if (ret == 0)
+ break; /* huh? report as "not loaded" */
+ fclose(fp);
+ usleep(20*1000);
+ goto again;
}
+ ret = 1;
+ break;
}
- config_close(parser);
- return ret;
+ fclose(fp);
+
+ return ret & 1;
}
#else
-#define already_loaded(name) is_rmmod
+#define already_loaded(name) 0
#endif
+static int rmmod(const char *filename)
+{
+ int r;
+ char modname[MODULE_NAME_LEN];
+
+ filename2modname(filename, modname);
+ r = delete_module(modname, O_NONBLOCK | O_EXCL);
+ dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname, r);
+ if (r != 0 && !(option_mask32 & OPT_q)) {
+ bb_perror_msg("remove '%s'", modname);
+ }
+ return r;
+}
+
/*
* Given modules definition and module name (or alias, or symbol)
* load/remove the module respecting dependencies.
* NB: also called by depmod with bogus name "/",
* just in order to force modprobe.dep.bb creation.
*/
-#if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
+#if !ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
#define process_module(a,b) process_module(a)
#define cmdline_options ""
#endif
-static void process_module(char *name, const char *cmdline_options)
+static int process_module(char *name, const char *cmdline_options)
{
char *s, *deps, *options;
+ module_info **infovec;
module_info *info;
- int is_rmmod = (option_mask32 & OPT_r) != 0;
+ int infoidx;
+ bool is_remove = (ENABLE_RMMOD && ONLY_APPLET)
+ || ((ENABLE_RMMOD || ENABLE_MODPROBE) && (option_mask32 & OPT_r));
+ int exitcode = EXIT_SUCCESS;
+
dbg1_error_msg("process_module('%s','%s')", name, cmdline_options);
replace(name, '-', '_');
- dbg1_error_msg("already_loaded:%d is_rmmod:%d", already_loaded(name), is_rmmod);
- if (already_loaded(name) != is_rmmod) {
+ dbg1_error_msg("already_loaded:%d is_remove:%d", already_loaded(name), is_remove);
+
+ if (is_rmmod) {
+ /* Does not remove dependencies, no need to scan, just remove.
+ * (compat note: this allows and strips .ko suffix)
+ */
+ rmmod(name);
+ return EXIT_SUCCESS;
+ }
+
+ /*
+ * We used to have "is_remove != already_loaded(name)" check here, but
+ * modprobe -r pci:v00008086d00007010sv00000000sd00000000bc01sc01i80
+ * won't unload modules (there are more than one)
+ * which have this alias.
+ */
+ if (!is_remove && already_loaded(name)) {
dbg1_error_msg("nothing to do for '%s'", name);
- return;
+ return EXIT_SUCCESS;
}
options = NULL;
- if (!is_rmmod) {
+ if (!is_remove) {
char *opt_filename = xasprintf("/etc/modules/%s", name);
options = xmalloc_open_read_close(opt_filename, NULL);
if (options)
replace(options, '\n', ' ');
-#if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
if (cmdline_options) {
/* NB: cmdline_options always have one leading ' '
* (see main()), we remove it here */
if (!module_count) {
/* Scan module directory. This is done only once.
* It will attempt module load, and will exit(EXIT_SUCCESS)
- * on success. */
+ * on success.
+ */
module_found_idx = -1;
recursive_action(".",
ACTION_RECURSE, /* flags */
fileAction, /* file action */
NULL, /* dir action */
name, /* user data */
- 0); /* depth */
+ 0 /* depth */
+ );
dbg1_error_msg("dirscan complete");
- /* Module was not found, or load failed, or is_rmmod */
+ /* Module was not found, or load failed, or is_remove */
if (module_found_idx >= 0) { /* module was found */
- info = &modinfo[module_found_idx];
+ infovec = xzalloc(2 * sizeof(infovec[0]));
+ infovec[0] = &modinfo[module_found_idx];
} else { /* search for alias, not a plain module name */
- info = find_alias(name);
+ infovec = find_alias(name);
}
} else {
- info = find_alias(name);
+ infovec = find_alias(name);
}
- /* rmmod? unload it by name */
- if (is_rmmod) {
- if (delete_module(name, O_NONBLOCK | O_EXCL) != 0
- && !(option_mask32 & OPT_q)
- ) {
- bb_perror_msg("remove '%s'", name);
- goto ret;
+ if (!infovec) {
+ /* both dirscan and find_alias found nothing */
+ if (!is_remove && !is_depmod) { /* it wasn't rmmod or depmod */
+ bb_error_msg("module '%s' not found", name);
+//TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
+ /* "modprobe non-existing-module; echo $?" must print 1 */
+ exitcode = EXIT_FAILURE;
+ }
+ goto ret;
+ }
+
+ /* There can be more than one module for the given alias. For example,
+ * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches
+ * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*"
+ * and ata_generic, it has alias "pci:v*d*sv*sd*bc01sc01i*"
+ * Standard modprobe loads them both. We achieve it by returning
+ * a *list* of modinfo pointers from find_alias().
+ */
+
+ /* modprobe -r? unload module(s) */
+ if (is_remove) {
+ infoidx = 0;
+ while ((info = infovec[infoidx++]) != NULL) {
+ int r = rmmod(bb_get_last_path_component_nostrip(info->pathname));
+ if (r != 0) {
+ goto ret; /* error */
+ }
}
- /* N.B. we do not stop here -
+ /* modprobe -r: we do not stop here -
* continue to unload modules on which the module depends:
* "-r --remove: option causes modprobe to remove a module.
* If the modules it depends on are also unused, modprobe
- * will try to remove them, too." */
+ * will try to remove them, too."
+ */
}
- if (!info) {
- /* both dirscan and find_alias found nothing */
- if (applet_name[0] != 'd') /* it wasn't depmod */
- bb_error_msg("module '%s' not found", name);
-//TODO: _and_die()?
- goto ret;
- }
+ infoidx = 0;
+ while ((info = infovec[infoidx++]) != NULL) {
+ /* Iterate thru dependencies, trying to (un)load them */
+ deps = str_2_list(info->deps);
+ for (s = deps; *s; s += strlen(s) + 1) {
+ //if (strcmp(name, s) != 0) // N.B. do loops exist?
+ dbg1_error_msg("recurse on dep '%s'", s);
+ process_module(s, NULL);
+ dbg1_error_msg("recurse on dep '%s' done", s);
+ }
+ free(deps);
- /* Iterate thru dependencies, trying to (un)load them */
- deps = str_2_list(info->deps);
- for (s = deps; *s; s += strlen(s) + 1) {
- //if (strcmp(name, s) != 0) // N.B. do loops exist?
- dbg1_error_msg("recurse on dep '%s'", s);
- process_module(s, NULL);
- dbg1_error_msg("recurse on dep '%s' done", s);
- }
- free(deps);
+ if (is_remove)
+ continue;
- /* modprobe -> load it */
- if (!is_rmmod) {
- if (!options || strstr(options, "blacklist") == NULL) {
- errno = 0;
- if (load_module(info->pathname, options) != 0) {
- if (EEXIST != errno) {
- bb_error_msg("'%s': %s",
- info->pathname,
- moderror(errno));
- } else {
- dbg1_error_msg("'%s': %s",
- info->pathname,
- moderror(errno));
- }
- }
- } else {
+ /* We are modprobe: load it */
+ if (options && strstr(options, "blacklist")) {
dbg1_error_msg("'%s': blacklisted", info->pathname);
+ continue;
+ }
+ if (info->open_read_failed) {
+ /* We already tried it, didn't work. Don't try load again */
+ exitcode = EXIT_FAILURE;
+ continue;
+ }
+ errno = 0;
+ if (load_module(info->pathname, options) != 0) {
+ if (EEXIST != errno) {
+ bb_error_msg("'%s': %s",
+ info->pathname,
+ moderror(errno));
+ } else {
+ dbg1_error_msg("'%s': %s",
+ info->pathname,
+ moderror(errno));
+ }
+ exitcode = EXIT_FAILURE;
}
}
ret:
+ free(infovec);
free(options);
-//TODO: return load attempt result from process_module.
-//If dep didn't load ok, continuing makes little sense.
+
+ return exitcode;
}
#undef cmdline_options
should eventually fall to zero).
# modprobe
-Usage: modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b]
- [-o <modname>] [ --dump-modversions ] <modname> [parameters...]
+Usage: modprobe [-v] [-V] [-C config-file] [-d <dirname> ] [-n] [-i] [-q]
+ [-b] [-o <modname>] [ --dump-modversions ] <modname> [parameters...]
modprobe -r [-n] [-i] [-v] <modulename> ...
modprobe -l -t <dirname> [ -a <modulename> ...]
# depmod --help
-depmod 3.4 -- part of module-init-tools
-depmod -[aA] [-n -e -v -q -V -r -u]
+depmod 3.13 -- part of module-init-tools
+depmod -[aA] [-n -e -v -q -V -r -u -w -m]
[-b basedirectory] [forced_version]
-depmod [-n -e -v -q -r -u] [-F kernelsyms] module1.ko module2.ko ...
+depmod [-n -e -v -q -r -u -w] [-F kernelsyms] module1.ko module2.ko ...
If no arguments (except options) are given, "depmod -a" is assumed.
depmod will output a dependency list suitable for the modprobe utility.
Options:
-a, --all Probe all modules
-A, --quick Only does the work if there's a new module
- -n, --show Write the dependency file on stdout only
-e, --errsyms Report not supplied symbols
+ -m, --map Create the legacy map files
+ -n, --show Write the dependency file on stdout only
+ -P, --symbol-prefix Architecture symbol prefix
-V, --version Print the release version
-v, --verbose Enable verbose mode
+ -w, --warn Warn on duplicates
-h, --help Print this usage message
The following options are useful for people managing distributions:
-b basedirectory
-F kernelsyms
--filesyms kernelsyms
Use the file instead of the current kernel symbols
+ -E Module.symvers
+ --symvers Module.symvers
+ Use Module.symvers file to check symbol versions
*/
+//usage:#if ENABLE_MODPROBE_SMALL
+
+//usage:#define depmod_trivial_usage "[-n]"
+//usage:#define depmod_full_usage "\n\n"
+//usage: "Generate modules.dep.bb"
+//usage: "\n"
+//usage: "\n -n Dry run: print file to stdout"
+
+//usage:#define insmod_trivial_usage
+//usage: "FILE" IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
+//usage:#define insmod_full_usage "\n\n"
+//usage: "Load kernel module"
+
+//usage:#define rmmod_trivial_usage
+//usage: "MODULE..."
+//usage:#define rmmod_full_usage "\n\n"
+//usage: "Unload kernel modules"
+
+//usage:#define modprobe_trivial_usage
+//usage: "[-rq] MODULE" IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
+//usage:#define modprobe_full_usage "\n\n"
+//usage: " -r Remove MODULE"
+//usage: "\n -q Quiet"
+
+//usage:#endif
+
int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int modprobe_main(int argc UNUSED_PARAM, char **argv)
{
+#if ENABLE_MODPROBE || ENABLE_INSMOD || ENABLE_RMMOD
+ int exitcode;
+#endif
struct utsname uts;
- char applet0 = applet_name[0];
- IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options;)
-
- /* are we lsmod? -> just dump /proc/modules */
- if ('l' == applet0) {
- xprint_and_close_file(xfopen_for_read("/proc/modules"));
- return EXIT_SUCCESS;
- }
+ IF_FEATURE_CMDLINE_MODULE_OPTIONS(char *options = NULL;)
INIT_G();
/* Prevent ugly corner cases with no modules at all */
modinfo = xzalloc(sizeof(modinfo[0]));
- if ('i' != applet0) { /* not insmod */
+ if ((MOD_APPLET_CNT == 2 && ENABLE_DEPMOD && ENABLE_MODPROBE)
+ || is_depmod || is_modprobe
+ ) {
/* Goto modules directory */
xchdir(CONFIG_DEFAULT_MODULES_DIR);
+ uname(&uts); /* never fails */
}
- uname(&uts); /* never fails */
/* depmod? */
- if ('d' == applet0) {
+ if (is_depmod) {
/* Supported:
* -n: print result to stdout
* -a: process all modules (default)
* -e: report any symbols which a module needs
* which are not supplied by other modules or the kernel
* -F FILE: System.map (symbols for -e)
- * -q, -r, -u: noop?
+ * -q, -r, -u: noop
* Not supported:
* -b BASEDIR: (TODO!) modules are in
* $BASEDIR/lib/modules/$VERSION
+ * -m: create legacy "modules.*map" files (deprecated; in
+ * kmod's depmod, prints a warning message and continues)
* -v: human readable deps to stdout
* -V: version (don't want to support it - people may depend
* on it as an indicator of "standard" depmod)
return !wrote_dep_bb_ok;
}
- /* insmod, modprobe, rmmod require at least one argument */
+#if ENABLE_MODPROBE || ENABLE_INSMOD || ENABLE_RMMOD
+ /* modprobe, insmod, rmmod require at least one argument */
opt_complementary = "-1";
/* only -q (quiet) and -r (rmmod),
* the rest are accepted and ignored (compat) */
- getopt32(argv, "qrfsvw");
+ getopt32(argv, "qrfsvwb");
argv += optind;
- /* are we rmmod? -> simulate modprobe -r */
- if ('r' == applet0) {
- option_mask32 |= OPT_r;
- }
-
- if ('i' != applet0) { /* not insmod */
+ if (is_modprobe) {
/* Goto $VERSION directory */
xchdir(uts.release);
}
-#if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
- /* If not rmmod, parse possible module options given on command line.
+ /* are we rmmod? -> simulate modprobe -r, but don't bother the flag if
+ * there're no other applets here */
+ if (is_rmmod) {
+ if (!ONLY_APPLET)
+ option_mask32 |= OPT_r;
+ } else if (!ENABLE_MODPROBE || !(option_mask32 & OPT_r)) {
+# if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
+ /* If not rmmod/-r, parse possible module options given on command line.
* insmod/modprobe takes one module name, the rest are parameters. */
- options = NULL;
- if ('r' != applet0) {
char **arg = argv;
while (*++arg) {
/* Enclose options in quotes */
free(s);
*arg = NULL;
}
- }
-#else
- if ('r' != applet0)
+# else
argv[1] = NULL;
-#endif
+# endif
+ }
- if ('i' == applet0) { /* insmod */
+ if (is_insmod) {
size_t len;
void *map;
len = MAXINT(ssize_t);
- map = xmalloc_xopen_read_close(*argv, &len);
+ map = xmalloc_open_zipped_read_close(*argv, &len);
+ if (!map)
+ bb_perror_msg_and_die("can't read '%s'", *argv);
if (init_module(map, len,
- IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : "")
- IF_NOT_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("")
- ) != 0)
+ (IF_FEATURE_CMDLINE_MODULE_OPTIONS(options ? options : ) "")
+ ) != 0
+ ) {
bb_error_msg_and_die("can't insert '%s': %s",
*argv, moderror(errno));
- return 0;
+ }
+ return EXIT_SUCCESS;
}
/* Try to load modprobe.dep.bb */
- load_dep_bb();
+ if (!is_rmmod) {
+ load_dep_bb();
+ }
/* Load/remove modules.
- * Only rmmod loops here, modprobe has only argv[0] */
+ * Only rmmod/modprobe -r loops here, insmod/modprobe has only argv[0] */
+ exitcode = EXIT_SUCCESS;
do {
- process_module(*argv++, options);
- } while (*argv);
+ exitcode |= process_module(*argv, options);
+ } while (*++argv);
if (ENABLE_FEATURE_CLEAN_UP) {
- IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);)
+ IF_FEATURE_CMDLINE_MODULE_OPTIONS(free(options);)
}
- return EXIT_SUCCESS;
+ return exitcode;
+#endif /* MODPROBE || INSMOD || RMMOD */
}
+
+#endif /* MOD_APPLET_CNT > 0 */
projects / oweals / busybox.git / blobdiff