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"rmmod OUT_OF_TREE_MODULE" was not working, because module is not in depmod file. In general, rmmod doesn't need scanning, it simply unloads every argv[i]. function old new delta rmmod - 63 +63 modprobe_main 449 465 +16 process_module 705 667 -38 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 79/-38) Total: 41 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
959 lines
27 KiB
C
959 lines
27 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* simplified modprobe
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*
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* Copyright (c) 2008 Vladimir Dronnikov
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* Copyright (c) 2008 Bernhard Reutner-Fischer (initial depmod code)
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//applet:IF_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
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//applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(depmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, depmod))
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//applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, insmod))
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//applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(lsmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, lsmod))
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//applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod))
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#include "libbb.h"
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/* After libbb.h, since it needs sys/types.h on some systems */
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#include <sys/utsname.h> /* uname() */
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#include <fnmatch.h>
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extern int init_module(void *module, unsigned long len, const char *options);
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extern int delete_module(const char *module, unsigned flags);
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extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
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/* linux/include/linux/module.h has limit of 64 chars on module names */
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#undef MODULE_NAME_LEN
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#define MODULE_NAME_LEN 64
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#if 1
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# define dbg1_error_msg(...) ((void)0)
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# define dbg2_error_msg(...) ((void)0)
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#else
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# define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__)
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# define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__)
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#endif
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#define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb"
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enum {
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OPT_q = (1 << 0), /* be quiet */
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OPT_r = (1 << 1), /* module removal instead of loading */
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};
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typedef struct module_info {
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char *pathname;
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char *aliases;
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char *deps;
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} module_info;
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/*
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* GLOBALS
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*/
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struct globals {
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module_info *modinfo;
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char *module_load_options;
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smallint dep_bb_seen;
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smallint wrote_dep_bb_ok;
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unsigned module_count;
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int module_found_idx;
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unsigned stringbuf_idx;
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unsigned stringbuf_size;
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char *stringbuf; /* some modules have lots of stuff */
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/* for example, drivers/media/video/saa7134/saa7134.ko */
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/* therefore having a fixed biggish buffer is not wise */
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};
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#define G (*ptr_to_globals)
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#define modinfo (G.modinfo )
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#define dep_bb_seen (G.dep_bb_seen )
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#define wrote_dep_bb_ok (G.wrote_dep_bb_ok )
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#define module_count (G.module_count )
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#define module_found_idx (G.module_found_idx )
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#define module_load_options (G.module_load_options)
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#define stringbuf_idx (G.stringbuf_idx )
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#define stringbuf_size (G.stringbuf_size )
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#define stringbuf (G.stringbuf )
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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} while (0)
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static void append(const char *s)
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{
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unsigned len = strlen(s);
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if (stringbuf_idx + len + 15 > stringbuf_size) {
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stringbuf_size = stringbuf_idx + len + 127;
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dbg2_error_msg("grow stringbuf to %u", stringbuf_size);
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stringbuf = xrealloc(stringbuf, stringbuf_size);
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}
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memcpy(stringbuf + stringbuf_idx, s, len);
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stringbuf_idx += len;
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}
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static void appendc(char c)
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{
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/* We appendc() only after append(), + 15 trick in append()
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* makes it unnecessary to check for overflow here */
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stringbuf[stringbuf_idx++] = c;
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}
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static void bksp(void)
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{
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if (stringbuf_idx)
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stringbuf_idx--;
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}
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static void reset_stringbuf(void)
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{
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stringbuf_idx = 0;
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}
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static char* copy_stringbuf(void)
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{
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char *copy = xzalloc(stringbuf_idx + 1); /* terminating NUL */
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return memcpy(copy, stringbuf, stringbuf_idx);
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}
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static char* find_keyword(char *ptr, size_t len, const char *word)
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{
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int wlen;
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if (!ptr) /* happens if xmalloc_open_zipped_read_close cannot read it */
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return NULL;
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wlen = strlen(word);
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len -= wlen - 1;
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while ((ssize_t)len > 0) {
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char *old = ptr;
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/* search for the first char in word */
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ptr = memchr(ptr, *word, len);
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if (ptr == NULL) /* no occurance left, done */
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break;
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if (strncmp(ptr, word, wlen) == 0)
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return ptr + wlen; /* found, return ptr past it */
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++ptr;
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len -= (ptr - old);
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}
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return NULL;
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}
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static void replace(char *s, char what, char with)
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{
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while (*s) {
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if (what == *s)
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*s = with;
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++s;
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}
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}
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static char *filename2modname(const char *filename, char *modname)
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{
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int i;
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const char *from;
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// Disabled since otherwise "modprobe dir/name" would work
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// as if it is "modprobe name". It is unclear why
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// 'basenamization' was here in the first place.
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//from = bb_get_last_path_component_nostrip(filename);
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from = filename;
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for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
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modname[i] = (from[i] == '-') ? '_' : from[i];
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modname[i] = '\0';
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return modname;
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}
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static int pathname_matches_modname(const char *pathname, const char *modname)
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{
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int r;
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char name[MODULE_NAME_LEN];
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filename2modname(bb_get_last_path_component_nostrip(pathname), name);
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r = (strcmp(name, modname) == 0);
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return r;
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}
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/* Take "word word", return malloced "word",NUL,"word",NUL,NUL */
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static char* str_2_list(const char *str)
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{
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int len = strlen(str) + 1;
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char *dst = xmalloc(len + 1);
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dst[len] = '\0';
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memcpy(dst, str, len);
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//TODO: protect against 2+ spaces: "word word"
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replace(dst, ' ', '\0');
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return dst;
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}
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/* We use error numbers in a loose translation... */
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static const char *moderror(int err)
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{
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switch (err) {
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case ENOEXEC:
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return "invalid module format";
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case ENOENT:
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return "unknown symbol in module or invalid parameter";
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case ESRCH:
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return "module has wrong symbol version";
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case EINVAL: /* "invalid parameter" */
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return "unknown symbol in module or invalid parameter"
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+ sizeof("unknown symbol in module or");
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default:
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return strerror(err);
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}
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}
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static int load_module(const char *fname, const char *options)
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{
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#if 1
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int r;
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size_t len = MAXINT(ssize_t);
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char *module_image;
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dbg1_error_msg("load_module('%s','%s')", fname, options);
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module_image = xmalloc_open_zipped_read_close(fname, &len);
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r = (!module_image || init_module(module_image, len, options ? options : "") != 0);
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free(module_image);
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dbg1_error_msg("load_module:%d", r);
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return r; /* 0 = success */
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#else
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/* For testing */
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dbg1_error_msg("load_module('%s','%s')", fname, options);
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return 1;
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#endif
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}
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static void parse_module(module_info *info, const char *pathname)
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{
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char *module_image;
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char *ptr;
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size_t len;
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size_t pos;
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dbg1_error_msg("parse_module('%s')", pathname);
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/* Read (possibly compressed) module */
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len = 64 * 1024 * 1024; /* 64 Mb at most */
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module_image = xmalloc_open_zipped_read_close(pathname, &len);
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/* module_image == NULL is ok here, find_keyword handles it */
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//TODO: optimize redundant module body reads
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/* "alias1 symbol:sym1 alias2 symbol:sym2" */
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reset_stringbuf();
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pos = 0;
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while (1) {
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unsigned start = stringbuf_idx;
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ptr = find_keyword(module_image + pos, len - pos, "alias=");
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if (!ptr) {
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ptr = find_keyword(module_image + pos, len - pos, "__ksymtab_");
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if (!ptr)
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break;
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/* DOCME: __ksymtab_gpl and __ksymtab_strings occur
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* in many modules. What do they mean? */
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if (strcmp(ptr, "gpl") == 0 || strcmp(ptr, "strings") == 0)
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goto skip;
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dbg2_error_msg("alias:'symbol:%s'", ptr);
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append("symbol:");
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} else {
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dbg2_error_msg("alias:'%s'", ptr);
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}
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append(ptr);
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appendc(' ');
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/*
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* Don't add redundant aliases, such as:
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* libcrc32c.ko symbol:crc32c symbol:crc32c
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*/
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if (start) { /* "if we aren't the first alias" */
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char *found, *last;
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stringbuf[stringbuf_idx] = '\0';
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last = stringbuf + start;
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/*
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* String at last-1 is " symbol:crc32c "
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* (with both leading and trailing spaces).
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*/
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if (strncmp(stringbuf, last, stringbuf_idx - start) == 0)
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/* First alias matches us */
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found = stringbuf;
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else
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/* Does any other alias match? */
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found = strstr(stringbuf, last-1);
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if (found < last-1) {
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/* There is absolutely the same string before us */
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dbg2_error_msg("redundant:'%s'", last);
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stringbuf_idx = start;
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goto skip;
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}
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}
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skip:
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pos = (ptr - module_image);
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}
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bksp(); /* remove last ' ' */
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info->aliases = copy_stringbuf();
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replace(info->aliases, '-', '_');
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/* "dependency1 depandency2" */
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reset_stringbuf();
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ptr = find_keyword(module_image, len, "depends=");
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if (ptr && *ptr) {
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replace(ptr, ',', ' ');
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replace(ptr, '-', '_');
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dbg2_error_msg("dep:'%s'", ptr);
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append(ptr);
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}
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info->deps = copy_stringbuf();
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free(module_image);
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}
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static FAST_FUNC int fileAction(const char *pathname,
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struct stat *sb UNUSED_PARAM,
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void *modname_to_match,
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int depth UNUSED_PARAM)
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{
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int cur;
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const char *fname;
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pathname += 2; /* skip "./" */
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fname = bb_get_last_path_component_nostrip(pathname);
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if (!strrstr(fname, ".ko")) {
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dbg1_error_msg("'%s' is not a module", pathname);
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return TRUE; /* not a module, continue search */
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}
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cur = module_count++;
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modinfo = xrealloc_vector(modinfo, 12, cur);
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modinfo[cur].pathname = xstrdup(pathname);
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/*modinfo[cur].aliases = NULL; - xrealloc_vector did it */
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/*modinfo[cur+1].pathname = NULL;*/
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if (!pathname_matches_modname(fname, modname_to_match)) {
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dbg1_error_msg("'%s' module name doesn't match", pathname);
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return TRUE; /* module name doesn't match, continue search */
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}
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dbg1_error_msg("'%s' module name matches", pathname);
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module_found_idx = cur;
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parse_module(&modinfo[cur], pathname);
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if (!(option_mask32 & OPT_r)) {
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if (load_module(pathname, module_load_options) == 0) {
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/* Load was successful, there is nothing else to do.
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* This can happen ONLY for "top-level" module load,
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* not a dep, because deps dont do dirscan. */
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exit(EXIT_SUCCESS);
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}
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}
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return TRUE;
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}
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static int load_dep_bb(void)
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{
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char *line;
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FILE *fp = fopen_for_read(DEPFILE_BB);
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if (!fp)
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return 0;
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dep_bb_seen = 1;
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dbg1_error_msg("loading "DEPFILE_BB);
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/* Why? There is a rare scenario: we did not find modprobe.dep.bb,
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* we scanned the dir and found no module by name, then we search
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* for alias (full scan), and we decided to generate modprobe.dep.bb.
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* But we see modprobe.dep.bb.new! Other modprobe is at work!
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* We wait and other modprobe renames it to modprobe.dep.bb.
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* Now we can use it.
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* But we already have modinfo[] filled, and "module_count = 0"
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* makes us start anew. Yes, we leak modinfo[].xxx pointers -
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* there is not much of data there anyway. */
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module_count = 0;
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memset(&modinfo[0], 0, sizeof(modinfo[0]));
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while ((line = xmalloc_fgetline(fp)) != NULL) {
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char* space;
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char* linebuf;
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int cur;
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if (!line[0]) {
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free(line);
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continue;
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}
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space = strchrnul(line, ' ');
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cur = module_count++;
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modinfo = xrealloc_vector(modinfo, 12, cur);
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/*modinfo[cur+1].pathname = NULL; - xrealloc_vector did it */
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modinfo[cur].pathname = line; /* we take ownership of malloced block here */
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if (*space)
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*space++ = '\0';
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modinfo[cur].aliases = space;
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linebuf = xmalloc_fgetline(fp);
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modinfo[cur].deps = linebuf ? linebuf : xzalloc(1);
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if (modinfo[cur].deps[0]) {
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/* deps are not "", so next line must be empty */
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line = xmalloc_fgetline(fp);
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/* Refuse to work with damaged config file */
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if (line && line[0])
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bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line);
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free(line);
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}
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}
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return 1;
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}
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static int start_dep_bb_writeout(void)
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{
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int fd;
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/* depmod -n: write result to stdout */
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if (applet_name[0] == 'd' && (option_mask32 & 1))
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return STDOUT_FILENO;
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fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644);
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if (fd < 0) {
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if (errno == EEXIST) {
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int count = 5 * 20;
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dbg1_error_msg(DEPFILE_BB".new exists, waiting for "DEPFILE_BB);
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while (1) {
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usleep(1000*1000 / 20);
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if (load_dep_bb()) {
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dbg1_error_msg(DEPFILE_BB" appeared");
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return -2; /* magic number */
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}
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if (!--count)
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break;
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}
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bb_error_msg("deleting stale %s", DEPFILE_BB".new");
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fd = open_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC);
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}
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}
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dbg1_error_msg("opened "DEPFILE_BB".new:%d", fd);
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return fd;
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}
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static void write_out_dep_bb(int fd)
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{
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int i;
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FILE *fp;
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/* We want good error reporting. fdprintf is not good enough. */
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fp = xfdopen_for_write(fd);
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i = 0;
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while (modinfo[i].pathname) {
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fprintf(fp, "%s%s%s\n" "%s%s\n",
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modinfo[i].pathname, modinfo[i].aliases[0] ? " " : "", modinfo[i].aliases,
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modinfo[i].deps, modinfo[i].deps[0] ? "\n" : "");
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i++;
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}
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/* Badly formatted depfile is a no-no. Be paranoid. */
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errno = 0;
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if (ferror(fp) | fclose(fp)) /* | instead of || is intended */
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goto err;
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if (fd == STDOUT_FILENO) /* it was depmod -n */
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goto ok;
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if (rename(DEPFILE_BB".new", DEPFILE_BB) != 0) {
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err:
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bb_perror_msg("can't create '%s'", DEPFILE_BB);
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unlink(DEPFILE_BB".new");
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} else {
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ok:
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wrote_dep_bb_ok = 1;
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dbg1_error_msg("created "DEPFILE_BB);
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}
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}
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static module_info** find_alias(const char *alias)
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{
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int i;
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int dep_bb_fd;
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int infoidx;
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module_info **infovec;
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dbg1_error_msg("find_alias('%s')", alias);
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try_again:
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/* First try to find by name (cheaper) */
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i = 0;
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while (modinfo[i].pathname) {
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if (pathname_matches_modname(modinfo[i].pathname, alias)) {
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dbg1_error_msg("found '%s' in module '%s'",
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alias, modinfo[i].pathname);
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if (!modinfo[i].aliases) {
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parse_module(&modinfo[i], modinfo[i].pathname);
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}
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infovec = xzalloc(2 * sizeof(infovec[0]));
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infovec[0] = &modinfo[i];
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|
return infovec;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
/* Ok, we definitely have to scan module bodies. This is a good
|
|
* moment to generate modprobe.dep.bb, if it does not exist yet */
|
|
dep_bb_fd = dep_bb_seen ? -1 : start_dep_bb_writeout();
|
|
if (dep_bb_fd == -2) /* modprobe.dep.bb appeared? */
|
|
goto try_again;
|
|
|
|
/* Scan all module bodies, extract modinfo (it contains aliases) */
|
|
i = 0;
|
|
infoidx = 0;
|
|
infovec = NULL;
|
|
while (modinfo[i].pathname) {
|
|
char *desc, *s;
|
|
if (!modinfo[i].aliases) {
|
|
parse_module(&modinfo[i], modinfo[i].pathname);
|
|
}
|
|
/* "alias1 symbol:sym1 alias2 symbol:sym2" */
|
|
desc = str_2_list(modinfo[i].aliases);
|
|
/* Does matching substring exist? */
|
|
for (s = desc; *s; s += strlen(s) + 1) {
|
|
/* Aliases in module bodies can be defined with
|
|
* shell patterns. Example:
|
|
* "pci:v000010DEd000000D9sv*sd*bc*sc*i*".
|
|
* Plain strcmp() won't catch that */
|
|
if (fnmatch(s, alias, 0) == 0) {
|
|
dbg1_error_msg("found alias '%s' in module '%s'",
|
|
alias, modinfo[i].pathname);
|
|
infovec = xrealloc_vector(infovec, 1, infoidx);
|
|
infovec[infoidx++] = &modinfo[i];
|
|
break;
|
|
}
|
|
}
|
|
free(desc);
|
|
i++;
|
|
}
|
|
|
|
/* Create module.dep.bb if needed */
|
|
if (dep_bb_fd >= 0) {
|
|
write_out_dep_bb(dep_bb_fd);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
config_close(parser);
|
|
return ret;
|
|
}
|
|
#else
|
|
#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
|
|
#define process_module(a,b) process_module(a)
|
|
#define cmdline_options ""
|
|
#endif
|
|
static void process_module(char *name, const char *cmdline_options)
|
|
{
|
|
char *s, *deps, *options;
|
|
module_info **infovec;
|
|
module_info *info;
|
|
int infoidx;
|
|
int is_remove = (option_mask32 & OPT_r) != 0;
|
|
|
|
dbg1_error_msg("process_module('%s','%s')", name, cmdline_options);
|
|
|
|
replace(name, '-', '_');
|
|
|
|
dbg1_error_msg("already_loaded:%d is_remove:%d", already_loaded(name), is_remove);
|
|
|
|
if (applet_name[0] == 'r') {
|
|
/* rmmod.
|
|
* Does not remove dependencies, no need to scan, just remove.
|
|
* (compat note: this allows and strips .ko suffix)
|
|
*/
|
|
rmmod(name);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
options = NULL;
|
|
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 (cmdline_options) {
|
|
/* NB: cmdline_options always have one leading ' '
|
|
* (see main()), we remove it here */
|
|
char *op = xasprintf(options ? "%s %s" : "%s %s" + 3,
|
|
cmdline_options + 1, options);
|
|
free(options);
|
|
options = op;
|
|
}
|
|
#endif
|
|
free(opt_filename);
|
|
module_load_options = options;
|
|
dbg1_error_msg("process_module('%s'): options:'%s'", name, options);
|
|
}
|
|
|
|
if (!module_count) {
|
|
/* Scan module directory. This is done only once.
|
|
* It will attempt module load, and will exit(EXIT_SUCCESS)
|
|
* on success.
|
|
*/
|
|
module_found_idx = -1;
|
|
recursive_action(".",
|
|
ACTION_RECURSE, /* flags */
|
|
fileAction, /* file action */
|
|
NULL, /* dir action */
|
|
name, /* user data */
|
|
0 /* depth */
|
|
);
|
|
dbg1_error_msg("dirscan complete");
|
|
/* Module was not found, or load failed, or is_remove */
|
|
if (module_found_idx >= 0) { /* module was found */
|
|
infovec = xzalloc(2 * sizeof(infovec[0]));
|
|
infovec[0] = &modinfo[module_found_idx];
|
|
} else { /* search for alias, not a plain module name */
|
|
infovec = find_alias(name);
|
|
}
|
|
} else {
|
|
infovec = find_alias(name);
|
|
}
|
|
|
|
if (!infovec) {
|
|
/* both dirscan and find_alias found nothing */
|
|
if (!is_remove && applet_name[0] != 'd') /* 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?
|
|
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 */
|
|
}
|
|
}
|
|
/* 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."
|
|
*/
|
|
}
|
|
|
|
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);
|
|
|
|
if (is_remove)
|
|
continue;
|
|
|
|
/* We are modprobe: load it */
|
|
if (options && strstr(options, "blacklist")) {
|
|
dbg1_error_msg("'%s': blacklisted", info->pathname);
|
|
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));
|
|
}
|
|
}
|
|
}
|
|
ret:
|
|
free(infovec);
|
|
free(options);
|
|
//TODO: return load attempt result from process_module.
|
|
//If dep didn't load ok, continuing makes little sense.
|
|
}
|
|
#undef cmdline_options
|
|
|
|
|
|
/* For reference, module-init-tools v3.4 options:
|
|
|
|
# insmod
|
|
Usage: insmod filename [args]
|
|
|
|
# rmmod --help
|
|
Usage: rmmod [-fhswvV] modulename ...
|
|
-f (or --force) forces a module unload, and may crash your
|
|
machine. This requires the Forced Module Removal option
|
|
when the kernel was compiled.
|
|
-h (or --help) prints this help text
|
|
-s (or --syslog) says use syslog, not stderr
|
|
-v (or --verbose) enables more messages
|
|
-V (or --version) prints the version code
|
|
-w (or --wait) begins module removal even if it is used
|
|
and will stop new users from accessing the module (so it
|
|
should eventually fall to zero).
|
|
|
|
# modprobe
|
|
Usage: modprobe [-v] [-V] [-C config-file] [-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]
|
|
[-b basedirectory] [forced_version]
|
|
depmod [-n -e -v -q -r -u] [-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
|
|
-V, --version Print the release version
|
|
-v, --verbose Enable verbose mode
|
|
-h, --help Print this usage message
|
|
The following options are useful for people managing distributions:
|
|
-b basedirectory
|
|
--basedir basedirectory
|
|
Use an image of a module tree
|
|
-F kernelsyms
|
|
--filesyms kernelsyms
|
|
Use the file instead of the current kernel symbols
|
|
*/
|
|
|
|
//usage:#if ENABLE_MODPROBE_SMALL
|
|
|
|
//usage:#define depmod_trivial_usage NOUSAGE_STR
|
|
//usage:#define depmod_full_usage ""
|
|
|
|
//usage:#define lsmod_trivial_usage
|
|
//usage: ""
|
|
//usage:#define lsmod_full_usage "\n\n"
|
|
//usage: "List the currently loaded kernel modules"
|
|
|
|
//usage:#define insmod_trivial_usage
|
|
//usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ")
|
|
//usage: IF_NOT_FEATURE_2_4_MODULES("FILE ")
|
|
//usage: "[SYMBOL=VALUE]..."
|
|
//usage:#define insmod_full_usage "\n\n"
|
|
//usage: "Load kernel module"
|
|
//usage: IF_FEATURE_2_4_MODULES( "\n"
|
|
//usage: "\n -f Force module to load into the wrong kernel version"
|
|
//usage: "\n -k Make module autoclean-able"
|
|
//usage: "\n -v Verbose"
|
|
//usage: "\n -q Quiet"
|
|
//usage: "\n -L Lock: prevent simultaneous loads"
|
|
//usage: IF_FEATURE_INSMOD_LOAD_MAP(
|
|
//usage: "\n -m Output load map to stdout"
|
|
//usage: )
|
|
//usage: "\n -x Don't export externs"
|
|
//usage: )
|
|
|
|
//usage:#define rmmod_trivial_usage
|
|
//usage: "[-wfa] [MODULE]..."
|
|
//usage:#define rmmod_full_usage "\n\n"
|
|
//usage: "Unload kernel modules\n"
|
|
//usage: "\n -w Wait until the module is no longer used"
|
|
//usage: "\n -f Force unload"
|
|
//usage: "\n -a Remove all unused modules (recursively)"
|
|
//usage:
|
|
//usage:#define rmmod_example_usage
|
|
//usage: "$ rmmod tulip\n"
|
|
|
|
//usage:#define modprobe_trivial_usage
|
|
//usage: "[-qfwrsv] MODULE [SYMBOL=VALUE]..."
|
|
//usage:#define modprobe_full_usage "\n\n"
|
|
//usage: " -r Remove MODULE (stacks) or do autoclean"
|
|
//usage: "\n -q Quiet"
|
|
//usage: "\n -v Verbose"
|
|
//usage: "\n -f Force"
|
|
//usage: "\n -w Wait for unload"
|
|
//usage: "\n -s Report via syslog instead of stderr"
|
|
|
|
//usage:#endif
|
|
|
|
int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int modprobe_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
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;
|
|
}
|
|
|
|
INIT_G();
|
|
|
|
/* Prevent ugly corner cases with no modules at all */
|
|
modinfo = xzalloc(sizeof(modinfo[0]));
|
|
|
|
if ('i' != applet0) { /* not insmod */
|
|
/* Goto modules directory */
|
|
xchdir(CONFIG_DEFAULT_MODULES_DIR);
|
|
}
|
|
uname(&uts); /* never fails */
|
|
|
|
/* depmod? */
|
|
if ('d' == applet0) {
|
|
/* Supported:
|
|
* -n: print result to stdout
|
|
* -a: process all modules (default)
|
|
* optional VERSION parameter
|
|
* Ignored:
|
|
* -A: do work only if a module is newer than depfile
|
|
* -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?
|
|
* Not supported:
|
|
* -b BASEDIR: (TODO!) modules are in
|
|
* $BASEDIR/lib/modules/$VERSION
|
|
* -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)
|
|
* -h: help (well duh)
|
|
* module1.o module2.o parameters (just ignored for now)
|
|
*/
|
|
getopt32(argv, "na" "AeF:qru" /* "b:vV", NULL */, NULL);
|
|
argv += optind;
|
|
/* if (argv[0] && argv[1]) bb_show_usage(); */
|
|
/* Goto $VERSION directory */
|
|
xchdir(argv[0] ? argv[0] : uts.release);
|
|
/* Force full module scan by asking to find a bogus module.
|
|
* This will generate modules.dep.bb as a side effect. */
|
|
process_module((char*)"/", NULL);
|
|
return !wrote_dep_bb_ok;
|
|
}
|
|
|
|
/* insmod, modprobe, rmmod require at least one argument */
|
|
opt_complementary = "-1";
|
|
/* only -q (quiet) and -r (rmmod),
|
|
* the rest are accepted and ignored (compat) */
|
|
getopt32(argv, "qrfsvwb");
|
|
argv += optind;
|
|
|
|
/* are we rmmod? -> simulate modprobe -r */
|
|
if ('r' == applet0) {
|
|
option_mask32 |= OPT_r;
|
|
}
|
|
|
|
if ('i' != applet0) { /* not insmod */
|
|
/* Goto $VERSION directory */
|
|
xchdir(uts.release);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
|
|
/* 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 (!(option_mask32 & OPT_r)) {
|
|
char **arg = argv;
|
|
while (*++arg) {
|
|
/* Enclose options in quotes */
|
|
char *s = options;
|
|
options = xasprintf("%s \"%s\"", s ? s : "", *arg);
|
|
free(s);
|
|
*arg = NULL;
|
|
}
|
|
}
|
|
#else
|
|
if (!(option_mask32 & OPT_r))
|
|
argv[1] = NULL;
|
|
#endif
|
|
|
|
if ('i' == applet0) { /* insmod */
|
|
size_t len;
|
|
void *map;
|
|
|
|
len = MAXINT(ssize_t);
|
|
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
|
|
) {
|
|
bb_error_msg_and_die("can't insert '%s': %s",
|
|
*argv, moderror(errno));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Try to load modprobe.dep.bb */
|
|
if ('r' != applet0) /* not rmmod */
|
|
load_dep_bb();
|
|
|
|
/* Load/remove modules.
|
|
* Only rmmod/modprobe -r loops here, insmod/modprobe has only argv[0] */
|
|
do {
|
|
process_module(*argv, options);
|
|
} while (*++argv);
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);)
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|