Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * simplified modprobe |
| 4 | * |
| 5 | * Copyright (c) 2008 Vladimir Dronnikov |
Bernhard Reutner-Fischer | 6c4dade | 2008-09-25 12:13:34 +0000 | [diff] [blame] | 6 | * Copyright (c) 2008 Bernhard Reutner-Fischer (initial depmod code) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 7 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 8 | * Licensed under GPLv2, see file LICENSE in this source tree. |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 9 | */ |
| 10 | |
Denys Vlasenko | b9f2d9f | 2011-01-18 13:58:01 +0100 | [diff] [blame] | 11 | //applet:IF_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP)) |
Denys Vlasenko | 5fd3ddf | 2014-04-19 15:04:39 +0200 | [diff] [blame] | 12 | //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(depmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, depmod)) |
| 13 | //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, insmod)) |
| 14 | //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(lsmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, lsmod)) |
| 15 | //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod)) |
Denys Vlasenko | c15613c | 2010-10-15 11:29:02 +0200 | [diff] [blame] | 16 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 17 | #include "libbb.h" |
Denys Vlasenko | 043b1e5 | 2009-09-06 12:47:55 +0200 | [diff] [blame] | 18 | /* After libbb.h, since it needs sys/types.h on some systems */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 19 | #include <sys/utsname.h> /* uname() */ |
| 20 | #include <fnmatch.h> |
| 21 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 22 | extern int init_module(void *module, unsigned long len, const char *options); |
| 23 | extern int delete_module(const char *module, unsigned flags); |
| 24 | extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret); |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 25 | /* linux/include/linux/module.h has limit of 64 chars on module names */ |
| 26 | #undef MODULE_NAME_LEN |
| 27 | #define MODULE_NAME_LEN 64 |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 28 | |
| 29 | |
Denys Vlasenko | 5b3151c | 2010-09-25 14:37:06 +0200 | [diff] [blame] | 30 | #if 1 |
| 31 | # define dbg1_error_msg(...) ((void)0) |
| 32 | # define dbg2_error_msg(...) ((void)0) |
| 33 | #else |
| 34 | # define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__) |
| 35 | # define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__) |
| 36 | #endif |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 37 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 38 | #define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb" |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 39 | |
| 40 | enum { |
| 41 | OPT_q = (1 << 0), /* be quiet */ |
| 42 | OPT_r = (1 << 1), /* module removal instead of loading */ |
| 43 | }; |
| 44 | |
| 45 | typedef struct module_info { |
| 46 | char *pathname; |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 47 | char *aliases; |
| 48 | char *deps; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 49 | } module_info; |
| 50 | |
| 51 | /* |
| 52 | * GLOBALS |
| 53 | */ |
| 54 | struct globals { |
| 55 | module_info *modinfo; |
| 56 | char *module_load_options; |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 57 | smallint dep_bb_seen; |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 58 | smallint wrote_dep_bb_ok; |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 59 | unsigned module_count; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 60 | int module_found_idx; |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 61 | unsigned stringbuf_idx; |
| 62 | unsigned stringbuf_size; |
| 63 | char *stringbuf; /* some modules have lots of stuff */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 64 | /* for example, drivers/media/video/saa7134/saa7134.ko */ |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 65 | /* therefore having a fixed biggish buffer is not wise */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 66 | }; |
| 67 | #define G (*ptr_to_globals) |
| 68 | #define modinfo (G.modinfo ) |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 69 | #define dep_bb_seen (G.dep_bb_seen ) |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 70 | #define wrote_dep_bb_ok (G.wrote_dep_bb_ok ) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 71 | #define module_count (G.module_count ) |
| 72 | #define module_found_idx (G.module_found_idx ) |
| 73 | #define module_load_options (G.module_load_options) |
| 74 | #define stringbuf_idx (G.stringbuf_idx ) |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 75 | #define stringbuf_size (G.stringbuf_size ) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 76 | #define stringbuf (G.stringbuf ) |
| 77 | #define INIT_G() do { \ |
| 78 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| 79 | } while (0) |
| 80 | |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 81 | static void append(const char *s) |
| 82 | { |
| 83 | unsigned len = strlen(s); |
| 84 | if (stringbuf_idx + len + 15 > stringbuf_size) { |
| 85 | stringbuf_size = stringbuf_idx + len + 127; |
| 86 | dbg2_error_msg("grow stringbuf to %u", stringbuf_size); |
| 87 | stringbuf = xrealloc(stringbuf, stringbuf_size); |
| 88 | } |
| 89 | memcpy(stringbuf + stringbuf_idx, s, len); |
| 90 | stringbuf_idx += len; |
| 91 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 92 | |
| 93 | static void appendc(char c) |
| 94 | { |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 95 | /* We appendc() only after append(), + 15 trick in append() |
| 96 | * makes it unnecessary to check for overflow here */ |
| 97 | stringbuf[stringbuf_idx++] = c; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 98 | } |
| 99 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 100 | static void bksp(void) |
| 101 | { |
| 102 | if (stringbuf_idx) |
| 103 | stringbuf_idx--; |
| 104 | } |
| 105 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 106 | static void reset_stringbuf(void) |
| 107 | { |
| 108 | stringbuf_idx = 0; |
| 109 | } |
| 110 | |
| 111 | static char* copy_stringbuf(void) |
| 112 | { |
Denys Vlasenko | 0c6914e | 2009-09-07 02:38:26 +0200 | [diff] [blame] | 113 | char *copy = xzalloc(stringbuf_idx + 1); /* terminating NUL */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 114 | return memcpy(copy, stringbuf, stringbuf_idx); |
| 115 | } |
| 116 | |
| 117 | static char* find_keyword(char *ptr, size_t len, const char *word) |
| 118 | { |
| 119 | int wlen; |
| 120 | |
Denis Vlasenko | e9ad84d | 2008-08-05 13:10:34 +0000 | [diff] [blame] | 121 | if (!ptr) /* happens if xmalloc_open_zipped_read_close cannot read it */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 122 | return NULL; |
| 123 | |
| 124 | wlen = strlen(word); |
| 125 | len -= wlen - 1; |
| 126 | while ((ssize_t)len > 0) { |
| 127 | char *old = ptr; |
| 128 | /* search for the first char in word */ |
| 129 | ptr = memchr(ptr, *word, len); |
| 130 | if (ptr == NULL) /* no occurance left, done */ |
| 131 | break; |
| 132 | if (strncmp(ptr, word, wlen) == 0) |
| 133 | return ptr + wlen; /* found, return ptr past it */ |
| 134 | ++ptr; |
| 135 | len -= (ptr - old); |
| 136 | } |
| 137 | return NULL; |
| 138 | } |
| 139 | |
| 140 | static void replace(char *s, char what, char with) |
| 141 | { |
| 142 | while (*s) { |
| 143 | if (what == *s) |
| 144 | *s = with; |
| 145 | ++s; |
| 146 | } |
| 147 | } |
| 148 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 149 | static char *filename2modname(const char *filename, char *modname) |
| 150 | { |
| 151 | int i; |
Denys Vlasenko | 7885452 | 2015-01-01 19:02:40 +0100 | [diff] [blame] | 152 | const char *from; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 153 | |
Denys Vlasenko | 7885452 | 2015-01-01 19:02:40 +0100 | [diff] [blame] | 154 | // Disabled since otherwise "modprobe dir/name" would work |
| 155 | // as if it is "modprobe name". It is unclear why |
| 156 | // 'basenamization' was here in the first place. |
| 157 | //from = bb_get_last_path_component_nostrip(filename); |
| 158 | from = filename; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 159 | for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++) |
| 160 | modname[i] = (from[i] == '-') ? '_' : from[i]; |
| 161 | modname[i] = '\0'; |
| 162 | |
| 163 | return modname; |
| 164 | } |
| 165 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 166 | /* Take "word word", return malloced "word",NUL,"word",NUL,NUL */ |
| 167 | static char* str_2_list(const char *str) |
| 168 | { |
| 169 | int len = strlen(str) + 1; |
| 170 | char *dst = xmalloc(len + 1); |
| 171 | |
| 172 | dst[len] = '\0'; |
| 173 | memcpy(dst, str, len); |
| 174 | //TODO: protect against 2+ spaces: "word word" |
| 175 | replace(dst, ' ', '\0'); |
| 176 | return dst; |
| 177 | } |
| 178 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 179 | /* We use error numbers in a loose translation... */ |
| 180 | static const char *moderror(int err) |
| 181 | { |
| 182 | switch (err) { |
| 183 | case ENOEXEC: |
| 184 | return "invalid module format"; |
| 185 | case ENOENT: |
| 186 | return "unknown symbol in module or invalid parameter"; |
| 187 | case ESRCH: |
| 188 | return "module has wrong symbol version"; |
| 189 | case EINVAL: /* "invalid parameter" */ |
| 190 | return "unknown symbol in module or invalid parameter" |
| 191 | + sizeof("unknown symbol in module or"); |
| 192 | default: |
| 193 | return strerror(err); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | static int load_module(const char *fname, const char *options) |
| 198 | { |
| 199 | #if 1 |
| 200 | int r; |
| 201 | size_t len = MAXINT(ssize_t); |
| 202 | char *module_image; |
| 203 | dbg1_error_msg("load_module('%s','%s')", fname, options); |
| 204 | |
Denis Vlasenko | e9ad84d | 2008-08-05 13:10:34 +0000 | [diff] [blame] | 205 | module_image = xmalloc_open_zipped_read_close(fname, &len); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 206 | r = (!module_image || init_module(module_image, len, options ? options : "") != 0); |
| 207 | free(module_image); |
| 208 | dbg1_error_msg("load_module:%d", r); |
| 209 | return r; /* 0 = success */ |
| 210 | #else |
| 211 | /* For testing */ |
| 212 | dbg1_error_msg("load_module('%s','%s')", fname, options); |
| 213 | return 1; |
| 214 | #endif |
| 215 | } |
| 216 | |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 217 | static void parse_module(module_info *info, const char *pathname) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 218 | { |
| 219 | char *module_image; |
| 220 | char *ptr; |
| 221 | size_t len; |
| 222 | size_t pos; |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 223 | dbg1_error_msg("parse_module('%s')", pathname); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 224 | |
| 225 | /* Read (possibly compressed) module */ |
| 226 | len = 64 * 1024 * 1024; /* 64 Mb at most */ |
Denis Vlasenko | e9ad84d | 2008-08-05 13:10:34 +0000 | [diff] [blame] | 227 | module_image = xmalloc_open_zipped_read_close(pathname, &len); |
Denys Vlasenko | 094cc51 | 2011-01-17 14:58:27 +0100 | [diff] [blame] | 228 | /* module_image == NULL is ok here, find_keyword handles it */ |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 229 | //TODO: optimize redundant module body reads |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 230 | |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 231 | /* "alias1 symbol:sym1 alias2 symbol:sym2" */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 232 | reset_stringbuf(); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 233 | pos = 0; |
| 234 | while (1) { |
Denys Vlasenko | 6116cb2 | 2014-04-19 16:17:27 +0200 | [diff] [blame] | 235 | unsigned start = stringbuf_idx; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 236 | ptr = find_keyword(module_image + pos, len - pos, "alias="); |
| 237 | if (!ptr) { |
| 238 | ptr = find_keyword(module_image + pos, len - pos, "__ksymtab_"); |
| 239 | if (!ptr) |
| 240 | break; |
| 241 | /* DOCME: __ksymtab_gpl and __ksymtab_strings occur |
| 242 | * in many modules. What do they mean? */ |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 243 | if (strcmp(ptr, "gpl") == 0 || strcmp(ptr, "strings") == 0) |
| 244 | goto skip; |
| 245 | dbg2_error_msg("alias:'symbol:%s'", ptr); |
| 246 | append("symbol:"); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 247 | } else { |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 248 | dbg2_error_msg("alias:'%s'", ptr); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 249 | } |
| 250 | append(ptr); |
| 251 | appendc(' '); |
Denys Vlasenko | 6116cb2 | 2014-04-19 16:17:27 +0200 | [diff] [blame] | 252 | /* |
| 253 | * Don't add redundant aliases, such as: |
| 254 | * libcrc32c.ko symbol:crc32c symbol:crc32c |
| 255 | */ |
| 256 | if (start) { /* "if we aren't the first alias" */ |
| 257 | char *found, *last; |
| 258 | stringbuf[stringbuf_idx] = '\0'; |
| 259 | last = stringbuf + start; |
| 260 | /* |
| 261 | * String at last-1 is " symbol:crc32c " |
| 262 | * (with both leading and trailing spaces). |
| 263 | */ |
| 264 | if (strncmp(stringbuf, last, stringbuf_idx - start) == 0) |
| 265 | /* First alias matches us */ |
| 266 | found = stringbuf; |
| 267 | else |
| 268 | /* Does any other alias match? */ |
| 269 | found = strstr(stringbuf, last-1); |
| 270 | if (found < last-1) { |
| 271 | /* There is absolutely the same string before us */ |
| 272 | dbg2_error_msg("redundant:'%s'", last); |
| 273 | stringbuf_idx = start; |
| 274 | goto skip; |
| 275 | } |
| 276 | } |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 277 | skip: |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 278 | pos = (ptr - module_image); |
| 279 | } |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 280 | bksp(); /* remove last ' ' */ |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 281 | info->aliases = copy_stringbuf(); |
Denys Vlasenko | f9c814b | 2009-09-07 02:37:19 +0200 | [diff] [blame] | 282 | replace(info->aliases, '-', '_'); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 283 | |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 284 | /* "dependency1 depandency2" */ |
| 285 | reset_stringbuf(); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 286 | ptr = find_keyword(module_image, len, "depends="); |
| 287 | if (ptr && *ptr) { |
| 288 | replace(ptr, ',', ' '); |
| 289 | replace(ptr, '-', '_'); |
| 290 | dbg2_error_msg("dep:'%s'", ptr); |
| 291 | append(ptr); |
| 292 | } |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 293 | info->deps = copy_stringbuf(); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 294 | |
| 295 | free(module_image); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 296 | } |
| 297 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 298 | static int pathname_matches_modname(const char *pathname, const char *modname) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 299 | { |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 300 | int r; |
| 301 | char name[MODULE_NAME_LEN]; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 302 | const char *fname = bb_get_last_path_component_nostrip(pathname); |
| 303 | const char *suffix = strrstr(fname, ".ko"); |
Denys Vlasenko | fd0640e | 2014-05-26 15:01:13 +0200 | [diff] [blame] | 304 | safe_strncpy(name, fname, suffix - fname + 1); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 305 | replace(name, '-', '_'); |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 306 | r = (strcmp(name, modname) == 0); |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 307 | return r; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | static FAST_FUNC int fileAction(const char *pathname, |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 311 | struct stat *sb UNUSED_PARAM, |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 312 | void *modname_to_match, |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 313 | int depth UNUSED_PARAM) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 314 | { |
| 315 | int cur; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 316 | const char *fname; |
| 317 | |
| 318 | pathname += 2; /* skip "./" */ |
| 319 | fname = bb_get_last_path_component_nostrip(pathname); |
| 320 | if (!strrstr(fname, ".ko")) { |
| 321 | dbg1_error_msg("'%s' is not a module", pathname); |
| 322 | return TRUE; /* not a module, continue search */ |
| 323 | } |
| 324 | |
| 325 | cur = module_count++; |
Denis Vlasenko | deeed59 | 2008-07-08 05:14:36 +0000 | [diff] [blame] | 326 | modinfo = xrealloc_vector(modinfo, 12, cur); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 327 | modinfo[cur].pathname = xstrdup(pathname); |
Denis Vlasenko | 2784228 | 2008-08-04 13:20:36 +0000 | [diff] [blame] | 328 | /*modinfo[cur].aliases = NULL; - xrealloc_vector did it */ |
| 329 | /*modinfo[cur+1].pathname = NULL;*/ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 330 | |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 331 | if (!pathname_matches_modname(fname, modname_to_match)) { |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 332 | dbg1_error_msg("'%s' module name doesn't match", pathname); |
| 333 | return TRUE; /* module name doesn't match, continue search */ |
| 334 | } |
| 335 | |
| 336 | dbg1_error_msg("'%s' module name matches", pathname); |
| 337 | module_found_idx = cur; |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 338 | parse_module(&modinfo[cur], pathname); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 339 | |
| 340 | if (!(option_mask32 & OPT_r)) { |
| 341 | if (load_module(pathname, module_load_options) == 0) { |
| 342 | /* Load was successful, there is nothing else to do. |
| 343 | * This can happen ONLY for "top-level" module load, |
| 344 | * not a dep, because deps dont do dirscan. */ |
| 345 | exit(EXIT_SUCCESS); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 349 | return TRUE; |
| 350 | } |
| 351 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 352 | static int load_dep_bb(void) |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 353 | { |
| 354 | char *line; |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 355 | FILE *fp = fopen_for_read(DEPFILE_BB); |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 356 | |
| 357 | if (!fp) |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 358 | return 0; |
| 359 | |
| 360 | dep_bb_seen = 1; |
| 361 | dbg1_error_msg("loading "DEPFILE_BB); |
| 362 | |
| 363 | /* Why? There is a rare scenario: we did not find modprobe.dep.bb, |
| 364 | * we scanned the dir and found no module by name, then we search |
| 365 | * for alias (full scan), and we decided to generate modprobe.dep.bb. |
| 366 | * But we see modprobe.dep.bb.new! Other modprobe is at work! |
| 367 | * We wait and other modprobe renames it to modprobe.dep.bb. |
| 368 | * Now we can use it. |
| 369 | * But we already have modinfo[] filled, and "module_count = 0" |
| 370 | * makes us start anew. Yes, we leak modinfo[].xxx pointers - |
| 371 | * there is not much of data there anyway. */ |
| 372 | module_count = 0; |
| 373 | memset(&modinfo[0], 0, sizeof(modinfo[0])); |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 374 | |
| 375 | while ((line = xmalloc_fgetline(fp)) != NULL) { |
| 376 | char* space; |
Denys Vlasenko | 90a9904 | 2009-09-06 02:36:23 +0200 | [diff] [blame] | 377 | char* linebuf; |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 378 | int cur; |
| 379 | |
| 380 | if (!line[0]) { |
| 381 | free(line); |
| 382 | continue; |
| 383 | } |
| 384 | space = strchrnul(line, ' '); |
| 385 | cur = module_count++; |
| 386 | modinfo = xrealloc_vector(modinfo, 12, cur); |
Denis Vlasenko | 2784228 | 2008-08-04 13:20:36 +0000 | [diff] [blame] | 387 | /*modinfo[cur+1].pathname = NULL; - xrealloc_vector did it */ |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 388 | modinfo[cur].pathname = line; /* we take ownership of malloced block here */ |
| 389 | if (*space) |
| 390 | *space++ = '\0'; |
| 391 | modinfo[cur].aliases = space; |
Denys Vlasenko | 90a9904 | 2009-09-06 02:36:23 +0200 | [diff] [blame] | 392 | linebuf = xmalloc_fgetline(fp); |
| 393 | modinfo[cur].deps = linebuf ? linebuf : xzalloc(1); |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 394 | if (modinfo[cur].deps[0]) { |
| 395 | /* deps are not "", so next line must be empty */ |
| 396 | line = xmalloc_fgetline(fp); |
| 397 | /* Refuse to work with damaged config file */ |
| 398 | if (line && line[0]) |
| 399 | bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line); |
| 400 | free(line); |
| 401 | } |
| 402 | } |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 403 | return 1; |
| 404 | } |
| 405 | |
| 406 | static int start_dep_bb_writeout(void) |
| 407 | { |
| 408 | int fd; |
| 409 | |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 410 | /* depmod -n: write result to stdout */ |
| 411 | if (applet_name[0] == 'd' && (option_mask32 & 1)) |
| 412 | return STDOUT_FILENO; |
| 413 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 414 | fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644); |
| 415 | if (fd < 0) { |
| 416 | if (errno == EEXIST) { |
| 417 | int count = 5 * 20; |
| 418 | dbg1_error_msg(DEPFILE_BB".new exists, waiting for "DEPFILE_BB); |
| 419 | while (1) { |
| 420 | usleep(1000*1000 / 20); |
| 421 | if (load_dep_bb()) { |
| 422 | dbg1_error_msg(DEPFILE_BB" appeared"); |
| 423 | return -2; /* magic number */ |
| 424 | } |
| 425 | if (!--count) |
| 426 | break; |
| 427 | } |
| 428 | bb_error_msg("deleting stale %s", DEPFILE_BB".new"); |
| 429 | fd = open_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC); |
| 430 | } |
| 431 | } |
| 432 | dbg1_error_msg("opened "DEPFILE_BB".new:%d", fd); |
| 433 | return fd; |
| 434 | } |
| 435 | |
| 436 | static void write_out_dep_bb(int fd) |
| 437 | { |
| 438 | int i; |
| 439 | FILE *fp; |
| 440 | |
| 441 | /* We want good error reporting. fdprintf is not good enough. */ |
Denys Vlasenko | a7ccdee | 2009-11-15 23:28:11 +0100 | [diff] [blame] | 442 | fp = xfdopen_for_write(fd); |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 443 | i = 0; |
| 444 | while (modinfo[i].pathname) { |
| 445 | fprintf(fp, "%s%s%s\n" "%s%s\n", |
| 446 | modinfo[i].pathname, modinfo[i].aliases[0] ? " " : "", modinfo[i].aliases, |
| 447 | modinfo[i].deps, modinfo[i].deps[0] ? "\n" : ""); |
| 448 | i++; |
| 449 | } |
| 450 | /* Badly formatted depfile is a no-no. Be paranoid. */ |
| 451 | errno = 0; |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 452 | if (ferror(fp) | fclose(fp)) /* | instead of || is intended */ |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 453 | goto err; |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 454 | |
| 455 | if (fd == STDOUT_FILENO) /* it was depmod -n */ |
| 456 | goto ok; |
| 457 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 458 | if (rename(DEPFILE_BB".new", DEPFILE_BB) != 0) { |
| 459 | err: |
Denys Vlasenko | 651a269 | 2010-03-23 16:25:17 +0100 | [diff] [blame] | 460 | bb_perror_msg("can't create '%s'", DEPFILE_BB); |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 461 | unlink(DEPFILE_BB".new"); |
| 462 | } else { |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 463 | ok: |
| 464 | wrote_dep_bb_ok = 1; |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 465 | dbg1_error_msg("created "DEPFILE_BB); |
| 466 | } |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 467 | } |
| 468 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 469 | static module_info** find_alias(const char *alias) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 470 | { |
| 471 | int i; |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 472 | int dep_bb_fd; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 473 | int infoidx; |
| 474 | module_info **infovec; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 475 | dbg1_error_msg("find_alias('%s')", alias); |
| 476 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 477 | try_again: |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 478 | /* First try to find by name (cheaper) */ |
| 479 | i = 0; |
| 480 | while (modinfo[i].pathname) { |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 481 | if (pathname_matches_modname(modinfo[i].pathname, alias)) { |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 482 | dbg1_error_msg("found '%s' in module '%s'", |
| 483 | alias, modinfo[i].pathname); |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 484 | if (!modinfo[i].aliases) { |
| 485 | parse_module(&modinfo[i], modinfo[i].pathname); |
| 486 | } |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 487 | infovec = xzalloc(2 * sizeof(infovec[0])); |
| 488 | infovec[0] = &modinfo[i]; |
| 489 | return infovec; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 490 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 491 | i++; |
| 492 | } |
| 493 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 494 | /* Ok, we definitely have to scan module bodies. This is a good |
| 495 | * moment to generate modprobe.dep.bb, if it does not exist yet */ |
| 496 | dep_bb_fd = dep_bb_seen ? -1 : start_dep_bb_writeout(); |
| 497 | if (dep_bb_fd == -2) /* modprobe.dep.bb appeared? */ |
| 498 | goto try_again; |
| 499 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 500 | /* Scan all module bodies, extract modinfo (it contains aliases) */ |
| 501 | i = 0; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 502 | infoidx = 0; |
| 503 | infovec = NULL; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 504 | while (modinfo[i].pathname) { |
| 505 | char *desc, *s; |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 506 | if (!modinfo[i].aliases) { |
| 507 | parse_module(&modinfo[i], modinfo[i].pathname); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 508 | } |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 509 | /* "alias1 symbol:sym1 alias2 symbol:sym2" */ |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 510 | desc = str_2_list(modinfo[i].aliases); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 511 | /* Does matching substring exist? */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 512 | for (s = desc; *s; s += strlen(s) + 1) { |
Denis Vlasenko | 24a131e | 2008-07-09 15:30:57 +0000 | [diff] [blame] | 513 | /* Aliases in module bodies can be defined with |
Denis Vlasenko | 58f59a2 | 2008-07-06 11:52:23 +0000 | [diff] [blame] | 514 | * shell patterns. Example: |
| 515 | * "pci:v000010DEd000000D9sv*sd*bc*sc*i*". |
| 516 | * Plain strcmp() won't catch that */ |
| 517 | if (fnmatch(s, alias, 0) == 0) { |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 518 | dbg1_error_msg("found alias '%s' in module '%s'", |
| 519 | alias, modinfo[i].pathname); |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 520 | infovec = xrealloc_vector(infovec, 1, infoidx); |
| 521 | infovec[infoidx++] = &modinfo[i]; |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 522 | break; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 523 | } |
| 524 | } |
| 525 | free(desc); |
| 526 | i++; |
| 527 | } |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 528 | |
| 529 | /* Create module.dep.bb if needed */ |
| 530 | if (dep_bb_fd >= 0) { |
| 531 | write_out_dep_bb(dep_bb_fd); |
| 532 | } |
| 533 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 534 | dbg1_error_msg("find_alias '%s' returns %d results", alias, infoidx); |
| 535 | return infovec; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | #if ENABLE_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED |
Denis Vlasenko | 0f99d49 | 2008-07-24 23:38:04 +0000 | [diff] [blame] | 539 | // TODO: open only once, invent config_rewind() |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 540 | static int already_loaded(const char *name) |
| 541 | { |
| 542 | int ret = 0; |
Denis Vlasenko | 0f99d49 | 2008-07-24 23:38:04 +0000 | [diff] [blame] | 543 | char *s; |
| 544 | parser_t *parser = config_open2("/proc/modules", xfopen_for_read); |
Denis Vlasenko | 084266e | 2008-07-26 23:08:31 +0000 | [diff] [blame] | 545 | while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) { |
Denis Vlasenko | 0f99d49 | 2008-07-24 23:38:04 +0000 | [diff] [blame] | 546 | if (strcmp(s, name) == 0) { |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 547 | ret = 1; |
| 548 | break; |
| 549 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 550 | } |
Denis Vlasenko | 0f99d49 | 2008-07-24 23:38:04 +0000 | [diff] [blame] | 551 | config_close(parser); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 552 | return ret; |
| 553 | } |
| 554 | #else |
| 555 | #define already_loaded(name) is_rmmod |
| 556 | #endif |
| 557 | |
| 558 | /* |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 559 | * Given modules definition and module name (or alias, or symbol) |
| 560 | * load/remove the module respecting dependencies. |
| 561 | * NB: also called by depmod with bogus name "/", |
| 562 | * just in order to force modprobe.dep.bb creation. |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 563 | */ |
| 564 | #if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE |
| 565 | #define process_module(a,b) process_module(a) |
| 566 | #define cmdline_options "" |
| 567 | #endif |
| 568 | static void process_module(char *name, const char *cmdline_options) |
| 569 | { |
| 570 | char *s, *deps, *options; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 571 | module_info **infovec; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 572 | module_info *info; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 573 | int infoidx; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 574 | int is_rmmod = (option_mask32 & OPT_r) != 0; |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 575 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 576 | dbg1_error_msg("process_module('%s','%s')", name, cmdline_options); |
| 577 | |
| 578 | replace(name, '-', '_'); |
| 579 | |
| 580 | dbg1_error_msg("already_loaded:%d is_rmmod:%d", already_loaded(name), is_rmmod); |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 581 | /* |
| 582 | * We used to have "is_rmmod != already_loaded(name)" check here, but |
| 583 | * modprobe -r pci:v00008086d00007010sv00000000sd00000000bc01sc01i80 |
| 584 | * won't unload modules (there are more than one) |
| 585 | * which have this alias. |
| 586 | */ |
| 587 | if (!is_rmmod && already_loaded(name)) { |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 588 | dbg1_error_msg("nothing to do for '%s'", name); |
| 589 | return; |
| 590 | } |
| 591 | |
| 592 | options = NULL; |
| 593 | if (!is_rmmod) { |
| 594 | char *opt_filename = xasprintf("/etc/modules/%s", name); |
| 595 | options = xmalloc_open_read_close(opt_filename, NULL); |
| 596 | if (options) |
| 597 | replace(options, '\n', ' '); |
| 598 | #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE |
| 599 | if (cmdline_options) { |
| 600 | /* NB: cmdline_options always have one leading ' ' |
| 601 | * (see main()), we remove it here */ |
| 602 | char *op = xasprintf(options ? "%s %s" : "%s %s" + 3, |
| 603 | cmdline_options + 1, options); |
| 604 | free(options); |
| 605 | options = op; |
| 606 | } |
| 607 | #endif |
| 608 | free(opt_filename); |
| 609 | module_load_options = options; |
| 610 | dbg1_error_msg("process_module('%s'): options:'%s'", name, options); |
| 611 | } |
| 612 | |
| 613 | if (!module_count) { |
| 614 | /* Scan module directory. This is done only once. |
| 615 | * It will attempt module load, and will exit(EXIT_SUCCESS) |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 616 | * on success. |
| 617 | */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 618 | module_found_idx = -1; |
| 619 | recursive_action(".", |
| 620 | ACTION_RECURSE, /* flags */ |
| 621 | fileAction, /* file action */ |
| 622 | NULL, /* dir action */ |
| 623 | name, /* user data */ |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 624 | 0 /* depth */ |
| 625 | ); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 626 | dbg1_error_msg("dirscan complete"); |
| 627 | /* Module was not found, or load failed, or is_rmmod */ |
| 628 | if (module_found_idx >= 0) { /* module was found */ |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 629 | infovec = xzalloc(2 * sizeof(infovec[0])); |
| 630 | infovec[0] = &modinfo[module_found_idx]; |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 631 | } else { /* search for alias, not a plain module name */ |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 632 | infovec = find_alias(name); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 633 | } |
| 634 | } else { |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 635 | infovec = find_alias(name); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 636 | } |
| 637 | |
Denys Vlasenko | 3c75b1c | 2015-01-11 17:40:30 +0100 | [diff] [blame^] | 638 | if (!infovec) { |
| 639 | /* both dirscan and find_alias found nothing */ |
| 640 | if (!is_rmmod && applet_name[0] != 'd') /* it wasn't rmmod or depmod */ |
| 641 | bb_error_msg("module '%s' not found", name); |
| 642 | //TODO: _and_die()? or should we continue (un)loading modules listed on cmdline? |
| 643 | goto ret; |
| 644 | } |
| 645 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 646 | /* There can be more than one module for the given alias. For example, |
| 647 | * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches |
| 648 | * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*" |
| 649 | * and ata_generic, it has alias "pci:v*d*sv*sd*bc01sc01i*" |
| 650 | * Standard modprobe loads them both. We achieve it by returning |
| 651 | * a *list* of modinfo pointers from find_alias(). |
| 652 | */ |
Denys Vlasenko | 6332151 | 2009-10-08 22:54:41 +0200 | [diff] [blame] | 653 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 654 | /* rmmod or modprobe -r? unload module(s) */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 655 | if (is_rmmod) { |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 656 | infoidx = 0; |
| 657 | while ((info = infovec[infoidx++]) != NULL) { |
| 658 | int r; |
| 659 | char modname[MODULE_NAME_LEN]; |
| 660 | |
Denys Vlasenko | 3c75b1c | 2015-01-11 17:40:30 +0100 | [diff] [blame^] | 661 | filename2modname( |
| 662 | bb_get_last_path_component_nostrip(info->pathname), modname); |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 663 | r = delete_module(modname, O_NONBLOCK | O_EXCL); |
| 664 | dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname, r); |
| 665 | if (r != 0) { |
| 666 | if (!(option_mask32 & OPT_q)) |
| 667 | bb_perror_msg("remove '%s'", modname); |
| 668 | goto ret; |
| 669 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 670 | } |
Denys Vlasenko | 06a98e3 | 2012-09-25 20:37:38 +0200 | [diff] [blame] | 671 | |
| 672 | if (applet_name[0] == 'r') { |
| 673 | /* rmmod: do not remove dependencies, exit */ |
| 674 | goto ret; |
| 675 | } |
| 676 | |
| 677 | /* modprobe -r: we do not stop here - |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 678 | * continue to unload modules on which the module depends: |
| 679 | * "-r --remove: option causes modprobe to remove a module. |
| 680 | * If the modules it depends on are also unused, modprobe |
Denys Vlasenko | 06a98e3 | 2012-09-25 20:37:38 +0200 | [diff] [blame] | 681 | * will try to remove them, too." |
| 682 | */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 683 | } |
| 684 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 685 | infoidx = 0; |
| 686 | while ((info = infovec[infoidx++]) != NULL) { |
| 687 | /* Iterate thru dependencies, trying to (un)load them */ |
| 688 | deps = str_2_list(info->deps); |
| 689 | for (s = deps; *s; s += strlen(s) + 1) { |
| 690 | //if (strcmp(name, s) != 0) // N.B. do loops exist? |
| 691 | dbg1_error_msg("recurse on dep '%s'", s); |
| 692 | process_module(s, NULL); |
| 693 | dbg1_error_msg("recurse on dep '%s' done", s); |
| 694 | } |
| 695 | free(deps); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 696 | |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 697 | if (is_rmmod) |
| 698 | continue; |
| 699 | |
| 700 | /* We are modprobe: load it */ |
| 701 | if (options && strstr(options, "blacklist")) { |
Denis Vlasenko | 1ad4db1 | 2008-11-12 00:09:58 +0000 | [diff] [blame] | 702 | dbg1_error_msg("'%s': blacklisted", info->pathname); |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 703 | continue; |
| 704 | } |
| 705 | errno = 0; |
| 706 | if (load_module(info->pathname, options) != 0) { |
| 707 | if (EEXIST != errno) { |
| 708 | bb_error_msg("'%s': %s", |
| 709 | info->pathname, |
| 710 | moderror(errno)); |
| 711 | } else { |
| 712 | dbg1_error_msg("'%s': %s", |
| 713 | info->pathname, |
| 714 | moderror(errno)); |
| 715 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 716 | } |
| 717 | } |
| 718 | ret: |
Denys Vlasenko | 07e5555 | 2014-04-21 16:59:36 +0200 | [diff] [blame] | 719 | free(infovec); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 720 | free(options); |
| 721 | //TODO: return load attempt result from process_module. |
| 722 | //If dep didn't load ok, continuing makes little sense. |
| 723 | } |
| 724 | #undef cmdline_options |
| 725 | |
| 726 | |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 727 | /* For reference, module-init-tools v3.4 options: |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 728 | |
| 729 | # insmod |
| 730 | Usage: insmod filename [args] |
| 731 | |
| 732 | # rmmod --help |
| 733 | Usage: rmmod [-fhswvV] modulename ... |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 734 | -f (or --force) forces a module unload, and may crash your |
| 735 | machine. This requires the Forced Module Removal option |
| 736 | when the kernel was compiled. |
| 737 | -h (or --help) prints this help text |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 738 | -s (or --syslog) says use syslog, not stderr |
| 739 | -v (or --verbose) enables more messages |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 740 | -V (or --version) prints the version code |
Denis Vlasenko | 35d8c47 | 2008-08-05 07:59:25 +0000 | [diff] [blame] | 741 | -w (or --wait) begins module removal even if it is used |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 742 | and will stop new users from accessing the module (so it |
| 743 | should eventually fall to zero). |
| 744 | |
| 745 | # modprobe |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 746 | Usage: modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b] |
| 747 | [-o <modname>] [ --dump-modversions ] <modname> [parameters...] |
| 748 | modprobe -r [-n] [-i] [-v] <modulename> ... |
| 749 | modprobe -l -t <dirname> [ -a <modulename> ...] |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 750 | |
| 751 | # depmod --help |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 752 | depmod 3.4 -- part of module-init-tools |
| 753 | depmod -[aA] [-n -e -v -q -V -r -u] |
| 754 | [-b basedirectory] [forced_version] |
| 755 | depmod [-n -e -v -q -r -u] [-F kernelsyms] module1.ko module2.ko ... |
| 756 | If no arguments (except options) are given, "depmod -a" is assumed. |
Denys Vlasenko | bf2af9a | 2009-05-25 04:15:37 +0200 | [diff] [blame] | 757 | depmod will output a dependency list suitable for the modprobe utility. |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 758 | Options: |
Denis Vlasenko | 35d8c47 | 2008-08-05 07:59:25 +0000 | [diff] [blame] | 759 | -a, --all Probe all modules |
| 760 | -A, --quick Only does the work if there's a new module |
| 761 | -n, --show Write the dependency file on stdout only |
| 762 | -e, --errsyms Report not supplied symbols |
| 763 | -V, --version Print the release version |
| 764 | -v, --verbose Enable verbose mode |
| 765 | -h, --help Print this usage message |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 766 | The following options are useful for people managing distributions: |
| 767 | -b basedirectory |
Denis Vlasenko | 35d8c47 | 2008-08-05 07:59:25 +0000 | [diff] [blame] | 768 | --basedir basedirectory |
| 769 | Use an image of a module tree |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 770 | -F kernelsyms |
Denis Vlasenko | 35d8c47 | 2008-08-05 07:59:25 +0000 | [diff] [blame] | 771 | --filesyms kernelsyms |
| 772 | Use the file instead of the current kernel symbols |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 773 | */ |
| 774 | |
Pascal Bellard | b82b34e | 2010-06-07 01:16:45 +0200 | [diff] [blame] | 775 | //usage:#if ENABLE_MODPROBE_SMALL |
Denys Vlasenko | 1a5e11c | 2010-10-16 01:56:41 +0200 | [diff] [blame] | 776 | |
| 777 | //usage:#define depmod_trivial_usage NOUSAGE_STR |
| 778 | //usage:#define depmod_full_usage "" |
| 779 | |
| 780 | //usage:#define lsmod_trivial_usage |
| 781 | //usage: "" |
| 782 | //usage:#define lsmod_full_usage "\n\n" |
| 783 | //usage: "List the currently loaded kernel modules" |
| 784 | |
| 785 | //usage:#define insmod_trivial_usage |
| 786 | //usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ") |
| 787 | //usage: IF_NOT_FEATURE_2_4_MODULES("FILE ") |
| 788 | //usage: "[SYMBOL=VALUE]..." |
| 789 | //usage:#define insmod_full_usage "\n\n" |
Denys Vlasenko | 5fd3ddf | 2014-04-19 15:04:39 +0200 | [diff] [blame] | 790 | //usage: "Load kernel module" |
Denys Vlasenko | 1a5e11c | 2010-10-16 01:56:41 +0200 | [diff] [blame] | 791 | //usage: IF_FEATURE_2_4_MODULES( "\n" |
Denys Vlasenko | 1a5e11c | 2010-10-16 01:56:41 +0200 | [diff] [blame] | 792 | //usage: "\n -f Force module to load into the wrong kernel version" |
| 793 | //usage: "\n -k Make module autoclean-able" |
| 794 | //usage: "\n -v Verbose" |
| 795 | //usage: "\n -q Quiet" |
| 796 | //usage: "\n -L Lock: prevent simultaneous loads" |
| 797 | //usage: IF_FEATURE_INSMOD_LOAD_MAP( |
| 798 | //usage: "\n -m Output load map to stdout" |
| 799 | //usage: ) |
| 800 | //usage: "\n -x Don't export externs" |
| 801 | //usage: ) |
| 802 | |
| 803 | //usage:#define rmmod_trivial_usage |
| 804 | //usage: "[-wfa] [MODULE]..." |
| 805 | //usage:#define rmmod_full_usage "\n\n" |
| 806 | //usage: "Unload kernel modules\n" |
Denys Vlasenko | 1a5e11c | 2010-10-16 01:56:41 +0200 | [diff] [blame] | 807 | //usage: "\n -w Wait until the module is no longer used" |
| 808 | //usage: "\n -f Force unload" |
| 809 | //usage: "\n -a Remove all unused modules (recursively)" |
| 810 | //usage: |
| 811 | //usage:#define rmmod_example_usage |
| 812 | //usage: "$ rmmod tulip\n" |
| 813 | |
Pascal Bellard | b82b34e | 2010-06-07 01:16:45 +0200 | [diff] [blame] | 814 | //usage:#define modprobe_trivial_usage |
Denys Vlasenko | 5fd3ddf | 2014-04-19 15:04:39 +0200 | [diff] [blame] | 815 | //usage: "[-qfwrsv] MODULE [SYMBOL=VALUE]..." |
Pascal Bellard | b82b34e | 2010-06-07 01:16:45 +0200 | [diff] [blame] | 816 | //usage:#define modprobe_full_usage "\n\n" |
Denys Vlasenko | 6642676 | 2011-06-05 03:58:28 +0200 | [diff] [blame] | 817 | //usage: " -r Remove MODULE (stacks) or do autoclean" |
Pascal Bellard | b82b34e | 2010-06-07 01:16:45 +0200 | [diff] [blame] | 818 | //usage: "\n -q Quiet" |
| 819 | //usage: "\n -v Verbose" |
| 820 | //usage: "\n -f Force" |
| 821 | //usage: "\n -w Wait for unload" |
| 822 | //usage: "\n -s Report via syslog instead of stderr" |
Denys Vlasenko | 1a5e11c | 2010-10-16 01:56:41 +0200 | [diff] [blame] | 823 | |
| 824 | //usage:#endif |
Pascal Bellard | b82b34e | 2010-06-07 01:16:45 +0200 | [diff] [blame] | 825 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 826 | int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 827 | int modprobe_main(int argc UNUSED_PARAM, char **argv) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 828 | { |
| 829 | struct utsname uts; |
| 830 | char applet0 = applet_name[0]; |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 831 | IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options;) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 832 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 833 | /* are we lsmod? -> just dump /proc/modules */ |
| 834 | if ('l' == applet0) { |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 835 | xprint_and_close_file(xfopen_for_read("/proc/modules")); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 836 | return EXIT_SUCCESS; |
| 837 | } |
| 838 | |
| 839 | INIT_G(); |
| 840 | |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 841 | /* Prevent ugly corner cases with no modules at all */ |
| 842 | modinfo = xzalloc(sizeof(modinfo[0])); |
| 843 | |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 844 | if ('i' != applet0) { /* not insmod */ |
| 845 | /* Goto modules directory */ |
| 846 | xchdir(CONFIG_DEFAULT_MODULES_DIR); |
| 847 | } |
Denis Vlasenko | 0e2c93f | 2008-07-10 14:16:11 +0000 | [diff] [blame] | 848 | uname(&uts); /* never fails */ |
| 849 | |
| 850 | /* depmod? */ |
| 851 | if ('d' == applet0) { |
| 852 | /* Supported: |
| 853 | * -n: print result to stdout |
| 854 | * -a: process all modules (default) |
| 855 | * optional VERSION parameter |
| 856 | * Ignored: |
| 857 | * -A: do work only if a module is newer than depfile |
| 858 | * -e: report any symbols which a module needs |
| 859 | * which are not supplied by other modules or the kernel |
| 860 | * -F FILE: System.map (symbols for -e) |
| 861 | * -q, -r, -u: noop? |
| 862 | * Not supported: |
| 863 | * -b BASEDIR: (TODO!) modules are in |
| 864 | * $BASEDIR/lib/modules/$VERSION |
| 865 | * -v: human readable deps to stdout |
| 866 | * -V: version (don't want to support it - people may depend |
| 867 | * on it as an indicator of "standard" depmod) |
| 868 | * -h: help (well duh) |
| 869 | * module1.o module2.o parameters (just ignored for now) |
| 870 | */ |
| 871 | getopt32(argv, "na" "AeF:qru" /* "b:vV", NULL */, NULL); |
| 872 | argv += optind; |
| 873 | /* if (argv[0] && argv[1]) bb_show_usage(); */ |
| 874 | /* Goto $VERSION directory */ |
| 875 | xchdir(argv[0] ? argv[0] : uts.release); |
| 876 | /* Force full module scan by asking to find a bogus module. |
| 877 | * This will generate modules.dep.bb as a side effect. */ |
| 878 | process_module((char*)"/", NULL); |
| 879 | return !wrote_dep_bb_ok; |
| 880 | } |
| 881 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 882 | /* insmod, modprobe, rmmod require at least one argument */ |
| 883 | opt_complementary = "-1"; |
| 884 | /* only -q (quiet) and -r (rmmod), |
| 885 | * the rest are accepted and ignored (compat) */ |
Felipe Contreras | 428bd2d | 2012-01-31 14:55:15 +0100 | [diff] [blame] | 886 | getopt32(argv, "qrfsvwb"); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 887 | argv += optind; |
| 888 | |
| 889 | /* are we rmmod? -> simulate modprobe -r */ |
| 890 | if ('r' == applet0) { |
| 891 | option_mask32 |= OPT_r; |
| 892 | } |
| 893 | |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 894 | if ('i' != applet0) { /* not insmod */ |
| 895 | /* Goto $VERSION directory */ |
| 896 | xchdir(uts.release); |
| 897 | } |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 898 | |
| 899 | #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE |
| 900 | /* If not rmmod, parse possible module options given on command line. |
| 901 | * insmod/modprobe takes one module name, the rest are parameters. */ |
| 902 | options = NULL; |
| 903 | if ('r' != applet0) { |
| 904 | char **arg = argv; |
| 905 | while (*++arg) { |
| 906 | /* Enclose options in quotes */ |
| 907 | char *s = options; |
| 908 | options = xasprintf("%s \"%s\"", s ? s : "", *arg); |
| 909 | free(s); |
| 910 | *arg = NULL; |
| 911 | } |
| 912 | } |
| 913 | #else |
| 914 | if ('r' != applet0) |
| 915 | argv[1] = NULL; |
| 916 | #endif |
| 917 | |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 918 | if ('i' == applet0) { /* insmod */ |
| 919 | size_t len; |
| 920 | void *map; |
| 921 | |
| 922 | len = MAXINT(ssize_t); |
Denys Vlasenko | e9d12b5 | 2011-01-09 20:57:52 +0100 | [diff] [blame] | 923 | map = xmalloc_open_zipped_read_close(*argv, &len); |
Denys Vlasenko | 094cc51 | 2011-01-17 14:58:27 +0100 | [diff] [blame] | 924 | if (!map) |
| 925 | bb_perror_msg_and_die("can't read '%s'", *argv); |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 926 | if (init_module(map, len, |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 927 | IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : "") |
| 928 | IF_NOT_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("") |
Denys Vlasenko | e9d12b5 | 2011-01-09 20:57:52 +0100 | [diff] [blame] | 929 | ) != 0 |
| 930 | ) { |
Denis Vlasenko | 1f63229 | 2009-04-13 02:25:40 +0000 | [diff] [blame] | 931 | bb_error_msg_and_die("can't insert '%s': %s", |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 932 | *argv, moderror(errno)); |
Denys Vlasenko | e9d12b5 | 2011-01-09 20:57:52 +0100 | [diff] [blame] | 933 | } |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 934 | return 0; |
| 935 | } |
| 936 | |
Denis Vlasenko | 7f950a9 | 2008-07-10 14:14:45 +0000 | [diff] [blame] | 937 | /* Try to load modprobe.dep.bb */ |
Denis Vlasenko | 7843699 | 2008-07-10 14:14:20 +0000 | [diff] [blame] | 938 | load_dep_bb(); |
| 939 | |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 940 | /* Load/remove modules. |
Denis Vlasenko | 1c781cc | 2008-09-06 14:14:01 +0000 | [diff] [blame] | 941 | * Only rmmod loops here, modprobe has only argv[0] */ |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 942 | do { |
Denys Vlasenko | 5b3151c | 2010-09-25 14:37:06 +0200 | [diff] [blame] | 943 | process_module(*argv, options); |
| 944 | } while (*++argv); |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 945 | |
| 946 | if (ENABLE_FEATURE_CLEAN_UP) { |
Denis Vlasenko | 5e34ff2 | 2009-04-21 11:09:40 +0000 | [diff] [blame] | 947 | IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);) |
Denis Vlasenko | 671691c | 2008-07-04 10:25:44 +0000 | [diff] [blame] | 948 | } |
| 949 | return EXIT_SUCCESS; |
| 950 | } |