kernel/params.c

   1 /* Helpers for initial module or kernel cmdline parsing
   2    Copyright (C) 2001 Rusty Russell.
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 */
  18 #include <linux/moduleparam.h>
  19 #include <linux/kernel.h>
  20 #include <linux/string.h>
  21 #include <linux/errno.h>
  22 #include <linux/module.h>
  23 #include <linux/device.h>
  24 #include <linux/err.h>
  25 #include <linux/slab.h>
  26
  27 #if 0
  28 #define DEBUGP printk
  29 #else
  30 #define DEBUGP(fmt, a...)
  31 #endif
  32
  33 static inline char dash2underscore(char c)
  34 {
  35         if (c == '-')
  36                 return '_';
  37         return c;
  38 }
  39
  40 static inline int parameq(const char *input, const char *paramname)
  41 {
  42         unsigned int i;
  43         for (i = 0; dash2underscore(input[i]) == paramname[i]; i++)
  44                 if (input[i] == '\0')
  45                         return 1;
  46         return 0;
  47 }
  48
  49 static int parse_one(char *param,
  50                      char *val,
  51                      struct kernel_param *params,
  52                      unsigned num_params,
  53                      int (*handle_unknown)(char *param, char *val))
  54 {
  55         unsigned int i;
  56
  57         /* Find parameter */
  58         for (i = 0; i < num_params; i++) {
  59                 if (parameq(param, params[i].name)) {
  60                         DEBUGP("They are equal!  Calling %p\n",
  61                                params[i].set);
  62                         return params[i].set(val, &params[i]);
  63                 }
  64         }
  65
  66         if (handle_unknown) {
  67                 DEBUGP("Unknown argument: calling %p\n", handle_unknown);
  68                 return handle_unknown(param, val);
  69         }
  70
  71         DEBUGP("Unknown argument `%s'\n", param);
  72         return -ENOENT;
  73 }
  74
  75 /* You can use " around spaces, but can't escape ". */
  76 /* Hyphens and underscores equivalent in parameter names. */
  77 static char *next_arg(char *args, char **param, char **val)
  78 {
  79         unsigned int i, equals = 0;
  80         int in_quote = 0, quoted = 0;
  81         char *next;
  82
  83         if (*args == '"') {
  84                 args++;
  85                 in_quote = 1;
  86                 quoted = 1;
  87         }
  88
  89         for (i = 0; args[i]; i++) {
  90                 if (args[i] == ' ' && !in_quote)
  91                         break;
  92                 if (equals == 0) {
  93                         if (args[i] == '=')
  94                                 equals = i;
  95                 }
  96                 if (args[i] == '"')
  97                         in_quote = !in_quote;
  98         }
  99
 100         *param = args;
 101         if (!equals)
 102                 *val = NULL;
 103         else {
 104                 args[equals] = '\0';
 105                 *val = args + equals + 1;
 106
 107                 /* Don't include quotes in value. */
 108                 if (**val == '"') {
 109                         (*val)++;
 110                         if (args[i-1] == '"')
 111                                 args[i-1] = '\0';
 112                 }
 113                 if (quoted && args[i-1] == '"')
 114                         args[i-1] = '\0';
 115         }
 116
 117         if (args[i]) {
 118                 args[i] = '\0';
 119                 next = args + i + 1;
 120         } else
 121                 next = args + i;
 122
 123         /* Chew up trailing spaces. */
 124         while (*next == ' ')
 125                 next++;
 126         return next;
 127 }
 128
 129 /* Args looks like "foo=bar,bar2 baz=fuz wiz". */
 130 int parse_args(const char *name,
 131                char *args,
 132                struct kernel_param *params,
 133                unsigned num,
 134                int (*unknown)(char *param, char *val))
 135 {
 136         char *param, *val;
 137
 138         DEBUGP("Parsing ARGS: %s\n", args);
 139
 140         /* Chew leading spaces */
 141         while (*args == ' ')
 142                 args++;
 143
 144         while (*args) {
 145                 int ret;
 146                 int irq_was_disabled;
 147
 148                 args = next_arg(args, &param, &val);
 149                 irq_was_disabled = irqs_disabled();
 150                 ret = parse_one(param, val, params, num, unknown);
 151                 if (irq_was_disabled && !irqs_disabled()) {
 152                         printk(KERN_WARNING "parse_args(): option '%s' enabled "
 153                                         "irq's!\n", param);
 154                 }
 155                 switch (ret) {
 156                 case -ENOENT:
 157                         printk(KERN_ERR "%s: Unknown parameter `%s'\n",
 158                                name, param);
 159                         return ret;
 160                 case -ENOSPC:
 161                         printk(KERN_ERR
 162                                "%s: `%s' too large for parameter `%s'\n",
 163                                name, val ?: "", param);
 164                         return ret;
 165                 case 0:
 166                         break;
 167                 default:
 168                         printk(KERN_ERR
 169                                "%s: `%s' invalid for parameter `%s'\n",
 170                                name, val ?: "", param);
 171                         return ret;
 172                 }
 173         }
 174
 175         /* All parsed OK. */
 176         return 0;
 177 }
 178
 179 /* Lazy bastard, eh? */
 180 #define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn)       \
 181         int param_set_##name(const char *val, struct kernel_param *kp)  \
 182         {                                                               \
 183                 char *endp;                                             \
 184                 tmptype l;                                              \
 185                                                                         \
 186                 if (!val) return -EINVAL;                               \
 187                 l = strtolfn(val, &endp, 0);                            \
 188                 if (endp == val || ((type)l != l))                      \
 189                         return -EINVAL;                                 \
 190                 *((type *)kp->arg) = l;                                 \
 191                 return 0;                                               \
 192         }                                                               \
 193         int param_get_##name(char *buffer, struct kernel_param *kp)     \
 194         {                                                               \
 195                 return sprintf(buffer, format, *((type *)kp->arg));     \
 196         }
 197
 198 STANDARD_PARAM_DEF(byte, unsigned char, "%c", unsigned long, simple_strtoul);
 199 STANDARD_PARAM_DEF(short, short, "%hi", long, simple_strtol);
 200 STANDARD_PARAM_DEF(ushort, unsigned short, "%hu", unsigned long, simple_strtoul);
 201 STANDARD_PARAM_DEF(int, int, "%i", long, simple_strtol);
 202 STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, simple_strtoul);
 203 STANDARD_PARAM_DEF(long, long, "%li", long, simple_strtol);
 204 STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, simple_strtoul);
 205
 206 int param_set_charp(const char *val, struct kernel_param *kp)
 207 {
 208         if (!val) {
 209                 printk(KERN_ERR "%s: string parameter expected\n",
 210                        kp->name);
 211                 return -EINVAL;
 212         }
 213
 214         if (strlen(val) > 1024) {
 215                 printk(KERN_ERR "%s: string parameter too long\n",
 216                        kp->name);
 217                 return -ENOSPC;
 218         }
 219
 220         *(char **)kp->arg = (char *)val;
 221         return 0;
 222 }
 223
 224 int param_get_charp(char *buffer, struct kernel_param *kp)
 225 {
 226         return sprintf(buffer, "%s", *((char **)kp->arg));
 227 }
 228
 229 int param_set_bool(const char *val, struct kernel_param *kp)
 230 {
 231         /* No equals means "set"... */
 232         if (!val) val = "1";
 233
 234         /* One of =[yYnN01] */
 235         switch (val[0]) {
 236         case 'y': case 'Y': case '1':
 237                 *(int *)kp->arg = 1;
 238                 return 0;
 239         case 'n': case 'N': case '0':
 240                 *(int *)kp->arg = 0;
 241                 return 0;
 242         }
 243         return -EINVAL;
 244 }
 245
 246 int param_get_bool(char *buffer, struct kernel_param *kp)
 247 {
 248         /* Y and N chosen as being relatively non-coder friendly */
 249         return sprintf(buffer, "%c", (*(int *)kp->arg) ? 'Y' : 'N');
 250 }
 251
 252 int param_set_invbool(const char *val, struct kernel_param *kp)
 253 {
 254         int boolval, ret;
 255         struct kernel_param dummy;
 256
 257         dummy.arg = &boolval;
 258         ret = param_set_bool(val, &dummy);
 259         if (ret == 0)
 260                 *(int *)kp->arg = !boolval;
 261         return ret;
 262 }
 263
 264 int param_get_invbool(char *buffer, struct kernel_param *kp)
 265 {
 266         return sprintf(buffer, "%c", (*(int *)kp->arg) ? 'N' : 'Y');
 267 }
 268
 269 /* We break the rule and mangle the string. */
 270 static int param_array(const char *name,
 271                        const char *val,
 272                        unsigned int min, unsigned int max,
 273                        void *elem, int elemsize,
 274                        int (*set)(const char *, struct kernel_param *kp),
 275                        int *num)
 276 {
 277         int ret;
 278         struct kernel_param kp;
 279         char save;
 280
 281         /* Get the name right for errors. */
 282         kp.name = name;
 283         kp.arg = elem;
 284
 285         /* No equals sign? */
 286         if (!val) {
 287                 printk(KERN_ERR "%s: expects arguments\n", name);
 288                 return -EINVAL;
 289         }
 290
 291         *num = 0;
 292         /* We expect a comma-separated list of values. */
 293         do {
 294                 int len;
 295
 296                 if (*num == max) {
 297                         printk(KERN_ERR "%s: can only take %i arguments\n",
 298                                name, max);
 299                         return -EINVAL;
 300                 }
 301                 len = strcspn(val, ",");
 302
 303                 /* nul-terminate and parse */
 304                 save = val[len];
 305                 ((char *)val)[len] = '\0';
 306                 ret = set(val, &kp);
 307
 308                 if (ret != 0)
 309                         return ret;
 310                 kp.arg += elemsize;
 311                 val += len+1;
 312                 (*num)++;
 313         } while (save == ',');
 314
 315         if (*num < min) {
 316                 printk(KERN_ERR "%s: needs at least %i arguments\n",
 317                        name, min);
 318                 return -EINVAL;
 319         }
 320         return 0;
 321 }
 322
 323 int param_array_set(const char *val, struct kernel_param *kp)
 324 {
 325         const struct kparam_array *arr = kp->arr;
 326         unsigned int temp_num;
 327
 328         return param_array(kp->name, val, 1, arr->max, arr->elem,
 329                            arr->elemsize, arr->set, arr->num ?: &temp_num);
 330 }
 331
 332 int param_array_get(char *buffer, struct kernel_param *kp)
 333 {
 334         int i, off, ret;
 335         const struct kparam_array *arr = kp->arr;
 336         struct kernel_param p;
 337
 338         p = *kp;
 339         for (i = off = 0; i < (arr->num ? *arr->num : arr->max); i++) {
 340                 if (i)
 341                         buffer[off++] = ',';
 342                 p.arg = arr->elem + arr->elemsize * i;
 343                 ret = arr->get(buffer + off, &p);
 344                 if (ret < 0)
 345                         return ret;
 346                 off += ret;
 347         }
 348         buffer[off] = '\0';
 349         return off;
 350 }
 351
 352 int param_set_copystring(const char *val, struct kernel_param *kp)
 353 {
 354         const struct kparam_string *kps = kp->str;
 355
 356         if (!val) {
 357                 printk(KERN_ERR "%s: missing param set value\n", kp->name);
 358                 return -EINVAL;
 359         }
 360         if (strlen(val)+1 > kps->maxlen) {
 361                 printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
 362                        kp->name, kps->maxlen-1);
 363                 return -ENOSPC;
 364         }
 365         strcpy(kps->string, val);
 366         return 0;
 367 }
 368
 369 int param_get_string(char *buffer, struct kernel_param *kp)
 370 {
 371         const struct kparam_string *kps = kp->str;
 372         return strlcpy(buffer, kps->string, kps->maxlen);
 373 }
 374
 375 /* sysfs output in /sys/modules/XYZ/parameters/ */
 376
 377 extern struct kernel_param __start___param[], __stop___param[];
 378
 379 #define MAX_KBUILD_MODNAME KOBJ_NAME_LEN
 380
 381 struct param_attribute
 382 {
 383         struct module_attribute mattr;
 384         struct kernel_param *param;
 385 };
 386
 387 struct module_param_attrs
 388 {
 389         struct attribute_group grp;
 390         struct param_attribute attrs[0];
 391 };
 392
 393 #ifdef CONFIG_SYSFS
 394 #define to_param_attr(n) container_of(n, struct param_attribute, mattr);
 395
 396 static ssize_t param_attr_show(struct module_attribute *mattr,
 397                                struct module *mod, char *buf)
 398 {
 399         int count;
 400         struct param_attribute *attribute = to_param_attr(mattr);
 401
 402         if (!attribute->param->get)
 403                 return -EPERM;
 404
 405         count = attribute->param->get(buf, attribute->param);
 406         if (count > 0) {
 407                 strcat(buf, "\n");
 408                 ++count;
 409         }
 410         return count;
 411 }
 412
 413 /* sysfs always hands a nul-terminated string in buf.  We rely on that. */
 414 static ssize_t param_attr_store(struct module_attribute *mattr,
 415                                 struct module *owner,
 416                                 const char *buf, size_t len)
 417 {
 418         int err;
 419         struct param_attribute *attribute = to_param_attr(mattr);
 420
 421         if (!attribute->param->set)
 422                 return -EPERM;
 423
 424         err = attribute->param->set(buf, attribute->param);
 425         if (!err)
 426                 return len;
 427         return err;
 428 }
 429 #endif
 430
 431 #ifdef CONFIG_MODULES
 432 #define __modinit
 433 #else
 434 #define __modinit __init
 435 #endif
 436
 437 #ifdef CONFIG_SYSFS
 438 /*
 439  * param_sysfs_setup - setup sysfs support for one module or KBUILD_MODNAME
 440  * @mk: struct module_kobject (contains parent kobject)
 441  * @kparam: array of struct kernel_param, the actual parameter definitions
 442  * @num_params: number of entries in array
 443  * @name_skip: offset where the parameter name start in kparam[].name. Needed for built-in "modules"
 444  *
 445  * Create a kobject for a (per-module) group of parameters, and create files
 446  * in sysfs. A pointer to the param_kobject is returned on success,
 447  * NULL if there's no parameter to export, or other ERR_PTR(err).
 448  */
 449 static __modinit struct module_param_attrs *
 450 param_sysfs_setup(struct module_kobject *mk,
 451                   struct kernel_param *kparam,
 452                   unsigned int num_params,
 453                   unsigned int name_skip)
 454 {
 455         struct module_param_attrs *mp;
 456         unsigned int valid_attrs = 0;
 457         unsigned int i, size[2];
 458         struct param_attribute *pattr;
 459         struct attribute **gattr;
 460         int err;
 461
 462         for (i=0; i<num_params; i++) {
 463                 if (kparam[i].perm)
 464                         valid_attrs++;
 465         }
 466
 467         if (!valid_attrs)
 468                 return NULL;
 469
 470         size[0] = ALIGN(sizeof(*mp) +
 471                         valid_attrs * sizeof(mp->attrs[0]),
 472                         sizeof(mp->grp.attrs[0]));
 473         size[1] = (valid_attrs + 1) * sizeof(mp->grp.attrs[0]);
 474
 475         mp = kmalloc(size[0] + size[1], GFP_KERNEL);
 476         if (!mp)
 477                 return ERR_PTR(-ENOMEM);
 478
 479         mp->grp.name = "parameters";
 480         mp->grp.attrs = (void *)mp + size[0];
 481
 482         pattr = &mp->attrs[0];
 483         gattr = &mp->grp.attrs[0];
 484         for (i = 0; i < num_params; i++) {
 485                 struct kernel_param *kp = &kparam[i];
 486                 if (kp->perm) {
 487                         pattr->param = kp;
 488                         pattr->mattr.show = param_attr_show;
 489                         pattr->mattr.store = param_attr_store;
 490                         pattr->mattr.attr.name = (char *)&kp->name[name_skip];
 491                         pattr->mattr.attr.mode = kp->perm;
 492                         *(gattr++) = &(pattr++)->mattr.attr;
 493                 }
 494         }
 495         *gattr = NULL;
 496
 497         if ((err = sysfs_create_group(&mk->kobj, &mp->grp))) {
 498                 kfree(mp);
 499                 return ERR_PTR(err);
 500         }
 501         return mp;
 502 }
 503
 504 #ifdef CONFIG_MODULES
 505 /*
 506  * module_param_sysfs_setup - setup sysfs support for one module
 507  * @mod: module
 508  * @kparam: module parameters (array)
 509  * @num_params: number of module parameters
 510  *
 511  * Adds sysfs entries for module parameters, and creates a link from
 512  * /sys/module/[mod->name]/parameters to /sys/parameters/[mod->name]/
 513  */
 514 int module_param_sysfs_setup(struct module *mod,
 515                              struct kernel_param *kparam,
 516                              unsigned int num_params)
 517 {
 518         struct module_param_attrs *mp;
 519
 520         mp = param_sysfs_setup(&mod->mkobj, kparam, num_params, 0);
 521         if (IS_ERR(mp))
 522                 return PTR_ERR(mp);
 523
 524         mod->param_attrs = mp;
 525         return 0;
 526 }
 527
 528 /*
 529  * module_param_sysfs_remove - remove sysfs support for one module
 530  * @mod: module
 531  *
 532  * Remove sysfs entries for module parameters and the corresponding
 533  * kobject.
 534  */
 535 void module_param_sysfs_remove(struct module *mod)
 536 {
 537         if (mod->param_attrs) {
 538                 sysfs_remove_group(&mod->mkobj.kobj,
 539                                    &mod->param_attrs->grp);
 540                 /* We are positive that no one is using any param
 541                  * attrs at this point.  Deallocate immediately. */
 542                 kfree(mod->param_attrs);
 543                 mod->param_attrs = NULL;
 544         }
 545 }
 546 #endif
 547
 548 /*
 549  * kernel_param_sysfs_setup - wrapper for built-in params support
 550  */
 551 static void __init kernel_param_sysfs_setup(const char *name,
 552                                             struct kernel_param *kparam,
 553                                             unsigned int num_params,
 554                                             unsigned int name_skip)
 555 {
 556         struct module_kobject *mk;
 557         int ret;
 558
 559         mk = kzalloc(sizeof(struct module_kobject), GFP_KERNEL);
 560         BUG_ON(!mk);
 561
 562         mk->mod = THIS_MODULE;
 563         kobj_set_kset_s(mk, module_subsys);
 564         kobject_set_name(&mk->kobj, name);
 565         kobject_init(&mk->kobj);
 566         ret = kobject_add(&mk->kobj);
 567         if (ret) {
 568                 printk(KERN_ERR "Module '%s' failed to be added to sysfs, "
 569                       "error number %d\n", name, ret);
 570                 printk(KERN_ERR "The system will be unstable now.\n");
 571                 return;
 572         }
 573         param_sysfs_setup(mk, kparam, num_params, name_skip);
 574         kobject_uevent(&mk->kobj, KOBJ_ADD);
 575 }
 576
 577 /*
 578  * param_sysfs_builtin - add contents in /sys/parameters for built-in modules
 579  *
 580  * Add module_parameters to sysfs for "modules" built into the kernel.
 581  *
 582  * The "module" name (KBUILD_MODNAME) is stored before a dot, the
 583  * "parameter" name is stored behind a dot in kernel_param->name. So,
 584  * extract the "module" name for all built-in kernel_param-eters,
 585  * and for all who have the same, call kernel_param_sysfs_setup.
 586  */
 587 static void __init param_sysfs_builtin(void)
 588 {
 589         struct kernel_param *kp, *kp_begin = NULL;
 590         unsigned int i, name_len, count = 0;
 591         char modname[MAX_KBUILD_MODNAME + 1] = "";
 592
 593         for (i=0; i < __stop___param - __start___param; i++) {
 594                 char *dot;
 595                 size_t kplen;
 596
 597                 kp = &__start___param[i];
 598                 kplen = strlen(kp->name);
 599
 600                 /* We do not handle args without periods. */
 601                 if (kplen > MAX_KBUILD_MODNAME) {
 602                         DEBUGP("kernel parameter name is too long: %s\n", kp->name);
 603                         continue;
 604                 }
 605                 dot = memchr(kp->name, '.', kplen);
 606                 if (!dot) {
 607                         DEBUGP("couldn't find period in %s\n", kp->name);
 608                         continue;
 609                 }
 610                 name_len = dot - kp->name;
 611
 612                 /* new kbuild_modname? */
 613                 if (strlen(modname) != name_len
 614                     || strncmp(modname, kp->name, name_len) != 0) {
 615                         /* add a new kobject for previous kernel_params. */
 616                         if (count)
 617                                 kernel_param_sysfs_setup(modname,
 618                                                          kp_begin,
 619                                                          count,
 620                                                          strlen(modname)+1);
 621
 622                         strncpy(modname, kp->name, name_len);
 623                         modname[name_len] = '\0';
 624                         count = 0;
 625                         kp_begin = kp;
 626                 }
 627                 count++;
 628         }
 629
 630         /* last kernel_params need to be registered as well */
 631         if (count)
 632                 kernel_param_sysfs_setup(modname, kp_begin, count,
 633                                          strlen(modname)+1);
 634 }
 635
 636
 637 /* module-related sysfs stuff */
 638
 639 #define to_module_attr(n) container_of(n, struct module_attribute, attr);
 640 #define to_module_kobject(n) container_of(n, struct module_kobject, kobj);
 641
 642 static ssize_t module_attr_show(struct kobject *kobj,
 643                                 struct attribute *attr,
 644                                 char *buf)
 645 {
 646         struct module_attribute *attribute;
 647         struct module_kobject *mk;
 648         int ret;
 649
 650         attribute = to_module_attr(attr);
 651         mk = to_module_kobject(kobj);
 652
 653         if (!attribute->show)
 654                 return -EIO;
 655
 656         ret = attribute->show(attribute, mk->mod, buf);
 657
 658         return ret;
 659 }
 660
 661 static ssize_t module_attr_store(struct kobject *kobj,
 662                                 struct attribute *attr,
 663                                 const char *buf, size_t len)
 664 {
 665         struct module_attribute *attribute;
 666         struct module_kobject *mk;
 667         int ret;
 668
 669         attribute = to_module_attr(attr);
 670         mk = to_module_kobject(kobj);
 671
 672         if (!attribute->store)
 673                 return -EIO;
 674
 675         ret = attribute->store(attribute, mk->mod, buf, len);
 676
 677         return ret;
 678 }
 679
 680 static struct sysfs_ops module_sysfs_ops = {
 681         .show = module_attr_show,
 682         .store = module_attr_store,
 683 };
 684
 685 static struct kobj_type module_ktype;
 686
 687 static int uevent_filter(struct kset *kset, struct kobject *kobj)
 688 {
 689         struct kobj_type *ktype = get_ktype(kobj);
 690
 691         if (ktype == &module_ktype)
 692                 return 1;
 693         return 0;
 694 }
 695
 696 static struct kset_uevent_ops module_uevent_ops = {
 697         .filter = uevent_filter,
 698 };
 699
 700 decl_subsys(module, &module_ktype, &module_uevent_ops);
 701 int module_sysfs_initialized;
 702
 703 static struct kobj_type module_ktype = {
 704         .sysfs_ops =    &module_sysfs_ops,
 705 };
 706
 707 /*
 708  * param_sysfs_init - wrapper for built-in params support
 709  */
 710 static int __init param_sysfs_init(void)
 711 {
 712         int ret;
 713
 714         ret = subsystem_register(&module_subsys);
 715         if (ret < 0) {
 716                 printk(KERN_WARNING "%s (%d): subsystem_register error: %d\n",
 717                         __FILE__, __LINE__, ret);
 718                 return ret;
 719         }
 720         module_sysfs_initialized = 1;
 721
 722         param_sysfs_builtin();
 723
 724         return 0;
 725 }
 726 subsys_initcall(param_sysfs_init);
 727
 728 #else
 729 #if 0
 730 static struct sysfs_ops module_sysfs_ops = {
 731         .show = NULL,
 732         .store = NULL,
 733 };
 734 #endif
 735 #endif
 736
 737 EXPORT_SYMBOL(param_set_byte);
 738 EXPORT_SYMBOL(param_get_byte);
 739 EXPORT_SYMBOL(param_set_short);
 740 EXPORT_SYMBOL(param_get_short);
 741 EXPORT_SYMBOL(param_set_ushort);
 742 EXPORT_SYMBOL(param_get_ushort);
 743 EXPORT_SYMBOL(param_set_int);
 744 EXPORT_SYMBOL(param_get_int);
 745 EXPORT_SYMBOL(param_set_uint);
 746 EXPORT_SYMBOL(param_get_uint);
 747 EXPORT_SYMBOL(param_set_long);
 748 EXPORT_SYMBOL(param_get_long);
 749 EXPORT_SYMBOL(param_set_ulong);
 750 EXPORT_SYMBOL(param_get_ulong);
 751 EXPORT_SYMBOL(param_set_charp);
 752 EXPORT_SYMBOL(param_get_charp);
 753 EXPORT_SYMBOL(param_set_bool);
 754 EXPORT_SYMBOL(param_get_bool);
 755 EXPORT_SYMBOL(param_set_invbool);
 756 EXPORT_SYMBOL(param_get_invbool);
 757 EXPORT_SYMBOL(param_array_set);
 758 EXPORT_SYMBOL(param_array_get);
 759 EXPORT_SYMBOL(param_set_copystring);
 760 EXPORT_SYMBOL(param_get_string);