1 /* Helpers for initial module or kernel cmdline parsing
2 Copyright (C) 2001 Rusty Russell.
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.
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.
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
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/device.h>
24 #include <linux/err.h>
25 #include <linux/slab.h>
26 #include <linux/ctype.h>
29 /* Protects all built-in parameters, modules use their own param_lock */
30 static DEFINE_MUTEX(param_lock
);
32 /* Use the module's mutex, or if built-in use the built-in mutex */
34 #define KPARAM_MUTEX(mod) ((mod) ? &(mod)->param_lock : ¶m_lock)
36 #define KPARAM_MUTEX(mod) (¶m_lock)
39 static inline void check_kparam_locked(struct module
*mod
)
41 BUG_ON(!mutex_is_locked(KPARAM_MUTEX(mod
)));
44 static inline void check_kparam_locked(struct module
*mod
)
47 #endif /* !CONFIG_SYSFS */
49 /* This just allows us to keep track of which parameters are kmalloced. */
50 struct kmalloced_param
{
51 struct list_head list
;
54 static LIST_HEAD(kmalloced_params
);
55 static DEFINE_SPINLOCK(kmalloced_params_lock
);
57 static void *kmalloc_parameter(unsigned int size
)
59 struct kmalloced_param
*p
;
61 p
= kmalloc(sizeof(*p
) + size
, GFP_KERNEL
);
65 spin_lock(&kmalloced_params_lock
);
66 list_add(&p
->list
, &kmalloced_params
);
67 spin_unlock(&kmalloced_params_lock
);
72 /* Does nothing if parameter wasn't kmalloced above. */
73 static void maybe_kfree_parameter(void *param
)
75 struct kmalloced_param
*p
;
77 spin_lock(&kmalloced_params_lock
);
78 list_for_each_entry(p
, &kmalloced_params
, list
) {
79 if (p
->val
== param
) {
85 spin_unlock(&kmalloced_params_lock
);
88 static char dash2underscore(char c
)
95 bool parameqn(const char *a
, const char *b
, size_t n
)
99 for (i
= 0; i
< n
; i
++) {
100 if (dash2underscore(a
[i
]) != dash2underscore(b
[i
]))
106 bool parameq(const char *a
, const char *b
)
108 return parameqn(a
, b
, strlen(a
)+1);
111 static void param_check_unsafe(const struct kernel_param
*kp
)
113 if (kp
->flags
& KERNEL_PARAM_FL_UNSAFE
) {
114 pr_warn("Setting dangerous option %s - tainting kernel\n",
116 add_taint(TAINT_USER
, LOCKDEP_STILL_OK
);
120 static int parse_one(char *param
,
123 const struct kernel_param
*params
,
128 int (*handle_unknown
)(char *param
, char *val
,
129 const char *doing
, void *arg
))
135 for (i
= 0; i
< num_params
; i
++) {
136 if (parameq(param
, params
[i
].name
)) {
137 if (params
[i
].level
< min_level
138 || params
[i
].level
> max_level
)
140 /* No one handled NULL, so do it here. */
142 !(params
[i
].ops
->flags
& KERNEL_PARAM_OPS_FL_NOARG
))
144 pr_debug("handling %s with %p\n", param
,
146 kernel_param_lock(params
[i
].mod
);
147 param_check_unsafe(¶ms
[i
]);
148 err
= params
[i
].ops
->set(val
, ¶ms
[i
]);
149 kernel_param_unlock(params
[i
].mod
);
154 if (handle_unknown
) {
155 pr_debug("doing %s: %s='%s'\n", doing
, param
, val
);
156 return handle_unknown(param
, val
, doing
, arg
);
159 pr_debug("Unknown argument '%s'\n", param
);
163 /* You can use " around spaces, but can't escape ". */
164 /* Hyphens and underscores equivalent in parameter names. */
165 static char *next_arg(char *args
, char **param
, char **val
)
167 unsigned int i
, equals
= 0;
168 int in_quote
= 0, quoted
= 0;
177 for (i
= 0; args
[i
]; i
++) {
178 if (isspace(args
[i
]) && !in_quote
)
185 in_quote
= !in_quote
;
193 *val
= args
+ equals
+ 1;
195 /* Don't include quotes in value. */
198 if (args
[i
-1] == '"')
202 if (quoted
&& args
[i
-1] == '"')
211 /* Chew up trailing spaces. */
212 return skip_spaces(next
);
215 /* Args looks like "foo=bar,bar2 baz=fuz wiz". */
216 char *parse_args(const char *doing
,
218 const struct kernel_param
*params
,
223 int (*unknown
)(char *param
, char *val
,
224 const char *doing
, void *arg
))
228 /* Chew leading spaces */
229 args
= skip_spaces(args
);
232 pr_debug("doing %s, parsing ARGS: '%s'\n", doing
, args
);
236 int irq_was_disabled
;
238 args
= next_arg(args
, ¶m
, &val
);
240 if (!val
&& strcmp(param
, "--") == 0)
242 irq_was_disabled
= irqs_disabled();
243 ret
= parse_one(param
, val
, doing
, params
, num
,
244 min_level
, max_level
, arg
, unknown
);
245 if (irq_was_disabled
&& !irqs_disabled())
246 pr_warn("%s: option '%s' enabled irq's!\n",
251 pr_err("%s: Unknown parameter `%s'\n", doing
, param
);
254 pr_err("%s: `%s' too large for parameter `%s'\n",
255 doing
, val
?: "", param
);
260 pr_err("%s: `%s' invalid for parameter `%s'\n",
261 doing
, val
?: "", param
);
270 /* Lazy bastard, eh? */
271 #define STANDARD_PARAM_DEF(name, type, format, strtolfn) \
272 int param_set_##name(const char *val, const struct kernel_param *kp) \
274 return strtolfn(val, 0, (type *)kp->arg); \
276 int param_get_##name(char *buffer, const struct kernel_param *kp) \
278 return scnprintf(buffer, PAGE_SIZE, format, \
279 *((type *)kp->arg)); \
281 const struct kernel_param_ops param_ops_##name = { \
282 .set = param_set_##name, \
283 .get = param_get_##name, \
285 EXPORT_SYMBOL(param_set_##name); \
286 EXPORT_SYMBOL(param_get_##name); \
287 EXPORT_SYMBOL(param_ops_##name)
290 STANDARD_PARAM_DEF(byte
, unsigned char, "%hhu", kstrtou8
);
291 STANDARD_PARAM_DEF(short, short, "%hi", kstrtos16
);
292 STANDARD_PARAM_DEF(ushort
, unsigned short, "%hu", kstrtou16
);
293 STANDARD_PARAM_DEF(int, int, "%i", kstrtoint
);
294 STANDARD_PARAM_DEF(uint
, unsigned int, "%u", kstrtouint
);
295 STANDARD_PARAM_DEF(long, long, "%li", kstrtol
);
296 STANDARD_PARAM_DEF(ulong
, unsigned long, "%lu", kstrtoul
);
297 STANDARD_PARAM_DEF(ullong
, unsigned long long, "%llu", kstrtoull
);
299 int param_set_charp(const char *val
, const struct kernel_param
*kp
)
301 if (strlen(val
) > 1024) {
302 pr_err("%s: string parameter too long\n", kp
->name
);
306 maybe_kfree_parameter(*(char **)kp
->arg
);
308 /* This is a hack. We can't kmalloc in early boot, and we
309 * don't need to; this mangled commandline is preserved. */
310 if (slab_is_available()) {
311 *(char **)kp
->arg
= kmalloc_parameter(strlen(val
)+1);
312 if (!*(char **)kp
->arg
)
314 strcpy(*(char **)kp
->arg
, val
);
316 *(const char **)kp
->arg
= val
;
320 EXPORT_SYMBOL(param_set_charp
);
322 int param_get_charp(char *buffer
, const struct kernel_param
*kp
)
324 return scnprintf(buffer
, PAGE_SIZE
, "%s", *((char **)kp
->arg
));
326 EXPORT_SYMBOL(param_get_charp
);
328 void param_free_charp(void *arg
)
330 maybe_kfree_parameter(*((char **)arg
));
332 EXPORT_SYMBOL(param_free_charp
);
334 const struct kernel_param_ops param_ops_charp
= {
335 .set
= param_set_charp
,
336 .get
= param_get_charp
,
337 .free
= param_free_charp
,
339 EXPORT_SYMBOL(param_ops_charp
);
341 /* Actually could be a bool or an int, for historical reasons. */
342 int param_set_bool(const char *val
, const struct kernel_param
*kp
)
344 /* No equals means "set"... */
347 /* One of =[yYnN01] */
348 return strtobool(val
, kp
->arg
);
350 EXPORT_SYMBOL(param_set_bool
);
352 int param_get_bool(char *buffer
, const struct kernel_param
*kp
)
354 /* Y and N chosen as being relatively non-coder friendly */
355 return sprintf(buffer
, "%c", *(bool *)kp
->arg
? 'Y' : 'N');
357 EXPORT_SYMBOL(param_get_bool
);
359 const struct kernel_param_ops param_ops_bool
= {
360 .flags
= KERNEL_PARAM_OPS_FL_NOARG
,
361 .set
= param_set_bool
,
362 .get
= param_get_bool
,
364 EXPORT_SYMBOL(param_ops_bool
);
366 int param_set_bool_enable_only(const char *val
, const struct kernel_param
*kp
)
370 bool orig_value
= *(bool *)kp
->arg
;
371 struct kernel_param dummy_kp
= *kp
;
373 dummy_kp
.arg
= &new_value
;
375 err
= param_set_bool(val
, &dummy_kp
);
379 /* Don't let them unset it once it's set! */
380 if (!new_value
&& orig_value
)
384 err
= param_set_bool(val
, kp
);
388 EXPORT_SYMBOL_GPL(param_set_bool_enable_only
);
390 const struct kernel_param_ops param_ops_bool_enable_only
= {
391 .flags
= KERNEL_PARAM_OPS_FL_NOARG
,
392 .set
= param_set_bool_enable_only
,
393 .get
= param_get_bool
,
395 EXPORT_SYMBOL_GPL(param_ops_bool_enable_only
);
397 /* This one must be bool. */
398 int param_set_invbool(const char *val
, const struct kernel_param
*kp
)
402 struct kernel_param dummy
;
404 dummy
.arg
= &boolval
;
405 ret
= param_set_bool(val
, &dummy
);
407 *(bool *)kp
->arg
= !boolval
;
410 EXPORT_SYMBOL(param_set_invbool
);
412 int param_get_invbool(char *buffer
, const struct kernel_param
*kp
)
414 return sprintf(buffer
, "%c", (*(bool *)kp
->arg
) ? 'N' : 'Y');
416 EXPORT_SYMBOL(param_get_invbool
);
418 const struct kernel_param_ops param_ops_invbool
= {
419 .set
= param_set_invbool
,
420 .get
= param_get_invbool
,
422 EXPORT_SYMBOL(param_ops_invbool
);
424 int param_set_bint(const char *val
, const struct kernel_param
*kp
)
426 /* Match bool exactly, by re-using it. */
427 struct kernel_param boolkp
= *kp
;
433 ret
= param_set_bool(val
, &boolkp
);
438 EXPORT_SYMBOL(param_set_bint
);
440 const struct kernel_param_ops param_ops_bint
= {
441 .flags
= KERNEL_PARAM_OPS_FL_NOARG
,
442 .set
= param_set_bint
,
443 .get
= param_get_int
,
445 EXPORT_SYMBOL(param_ops_bint
);
447 /* We break the rule and mangle the string. */
448 static int param_array(struct module
*mod
,
451 unsigned int min
, unsigned int max
,
452 void *elem
, int elemsize
,
453 int (*set
)(const char *, const struct kernel_param
*kp
),
458 struct kernel_param kp
;
461 /* Get the name right for errors. */
467 /* We expect a comma-separated list of values. */
472 pr_err("%s: can only take %i arguments\n", name
, max
);
475 len
= strcspn(val
, ",");
477 /* nul-terminate and parse */
479 ((char *)val
)[len
] = '\0';
480 check_kparam_locked(mod
);
488 } while (save
== ',');
491 pr_err("%s: needs at least %i arguments\n", name
, min
);
497 static int param_array_set(const char *val
, const struct kernel_param
*kp
)
499 const struct kparam_array
*arr
= kp
->arr
;
500 unsigned int temp_num
;
502 return param_array(kp
->mod
, kp
->name
, val
, 1, arr
->max
, arr
->elem
,
503 arr
->elemsize
, arr
->ops
->set
, kp
->level
,
504 arr
->num
?: &temp_num
);
507 static int param_array_get(char *buffer
, const struct kernel_param
*kp
)
510 const struct kparam_array
*arr
= kp
->arr
;
511 struct kernel_param p
= *kp
;
513 for (i
= off
= 0; i
< (arr
->num
? *arr
->num
: arr
->max
); i
++) {
516 p
.arg
= arr
->elem
+ arr
->elemsize
* i
;
517 check_kparam_locked(p
.mod
);
518 ret
= arr
->ops
->get(buffer
+ off
, &p
);
527 static void param_array_free(void *arg
)
530 const struct kparam_array
*arr
= arg
;
533 for (i
= 0; i
< (arr
->num
? *arr
->num
: arr
->max
); i
++)
534 arr
->ops
->free(arr
->elem
+ arr
->elemsize
* i
);
537 const struct kernel_param_ops param_array_ops
= {
538 .set
= param_array_set
,
539 .get
= param_array_get
,
540 .free
= param_array_free
,
542 EXPORT_SYMBOL(param_array_ops
);
544 int param_set_copystring(const char *val
, const struct kernel_param
*kp
)
546 const struct kparam_string
*kps
= kp
->str
;
548 if (strlen(val
)+1 > kps
->maxlen
) {
549 pr_err("%s: string doesn't fit in %u chars.\n",
550 kp
->name
, kps
->maxlen
-1);
553 strcpy(kps
->string
, val
);
556 EXPORT_SYMBOL(param_set_copystring
);
558 int param_get_string(char *buffer
, const struct kernel_param
*kp
)
560 const struct kparam_string
*kps
= kp
->str
;
561 return strlcpy(buffer
, kps
->string
, kps
->maxlen
);
563 EXPORT_SYMBOL(param_get_string
);
565 const struct kernel_param_ops param_ops_string
= {
566 .set
= param_set_copystring
,
567 .get
= param_get_string
,
569 EXPORT_SYMBOL(param_ops_string
);
571 /* sysfs output in /sys/modules/XYZ/parameters/ */
572 #define to_module_attr(n) container_of(n, struct module_attribute, attr)
573 #define to_module_kobject(n) container_of(n, struct module_kobject, kobj)
575 struct param_attribute
577 struct module_attribute mattr
;
578 const struct kernel_param
*param
;
581 struct module_param_attrs
584 struct attribute_group grp
;
585 struct param_attribute attrs
[0];
589 #define to_param_attr(n) container_of(n, struct param_attribute, mattr)
591 static ssize_t
param_attr_show(struct module_attribute
*mattr
,
592 struct module_kobject
*mk
, char *buf
)
595 struct param_attribute
*attribute
= to_param_attr(mattr
);
597 if (!attribute
->param
->ops
->get
)
600 kernel_param_lock(mk
->mod
);
601 count
= attribute
->param
->ops
->get(buf
, attribute
->param
);
602 kernel_param_unlock(mk
->mod
);
610 /* sysfs always hands a nul-terminated string in buf. We rely on that. */
611 static ssize_t
param_attr_store(struct module_attribute
*mattr
,
612 struct module_kobject
*mk
,
613 const char *buf
, size_t len
)
616 struct param_attribute
*attribute
= to_param_attr(mattr
);
618 if (!attribute
->param
->ops
->set
)
621 kernel_param_lock(mk
->mod
);
622 param_check_unsafe(attribute
->param
);
623 err
= attribute
->param
->ops
->set(buf
, attribute
->param
);
624 kernel_param_unlock(mk
->mod
);
631 #ifdef CONFIG_MODULES
634 #define __modinit __init
638 void kernel_param_lock(struct module
*mod
)
640 mutex_lock(KPARAM_MUTEX(mod
));
643 void kernel_param_unlock(struct module
*mod
)
645 mutex_unlock(KPARAM_MUTEX(mod
));
648 EXPORT_SYMBOL(kernel_param_lock
);
649 EXPORT_SYMBOL(kernel_param_unlock
);
652 * add_sysfs_param - add a parameter to sysfs
653 * @mk: struct module_kobject
654 * @kparam: the actual parameter definition to add to sysfs
655 * @name: name of parameter
657 * Create a kobject if for a (per-module) parameter if mp NULL, and
658 * create file in sysfs. Returns an error on out of memory. Always cleans up
659 * if there's an error.
661 static __modinit
int add_sysfs_param(struct module_kobject
*mk
,
662 const struct kernel_param
*kp
,
665 struct module_param_attrs
*new_mp
;
666 struct attribute
**new_attrs
;
669 /* We don't bother calling this with invisible parameters. */
673 /* First allocation. */
674 mk
->mp
= kzalloc(sizeof(*mk
->mp
), GFP_KERNEL
);
677 mk
->mp
->grp
.name
= "parameters";
678 /* NULL-terminated attribute array. */
679 mk
->mp
->grp
.attrs
= kzalloc(sizeof(mk
->mp
->grp
.attrs
[0]),
681 /* Caller will cleanup via free_module_param_attrs */
682 if (!mk
->mp
->grp
.attrs
)
686 /* Enlarge allocations. */
687 new_mp
= krealloc(mk
->mp
,
689 sizeof(mk
->mp
->attrs
[0]) * (mk
->mp
->num
+ 1),
695 /* Extra pointer for NULL terminator */
696 new_attrs
= krealloc(mk
->mp
->grp
.attrs
,
697 sizeof(mk
->mp
->grp
.attrs
[0]) * (mk
->mp
->num
+ 2),
701 mk
->mp
->grp
.attrs
= new_attrs
;
703 /* Tack new one on the end. */
704 memset(&mk
->mp
->attrs
[mk
->mp
->num
], 0, sizeof(mk
->mp
->attrs
[0]));
705 sysfs_attr_init(&mk
->mp
->attrs
[mk
->mp
->num
].mattr
.attr
);
706 mk
->mp
->attrs
[mk
->mp
->num
].param
= kp
;
707 mk
->mp
->attrs
[mk
->mp
->num
].mattr
.show
= param_attr_show
;
708 /* Do not allow runtime DAC changes to make param writable. */
709 if ((kp
->perm
& (S_IWUSR
| S_IWGRP
| S_IWOTH
)) != 0)
710 mk
->mp
->attrs
[mk
->mp
->num
].mattr
.store
= param_attr_store
;
712 mk
->mp
->attrs
[mk
->mp
->num
].mattr
.store
= NULL
;
713 mk
->mp
->attrs
[mk
->mp
->num
].mattr
.attr
.name
= (char *)name
;
714 mk
->mp
->attrs
[mk
->mp
->num
].mattr
.attr
.mode
= kp
->perm
;
717 /* Fix up all the pointers, since krealloc can move us */
718 for (i
= 0; i
< mk
->mp
->num
; i
++)
719 mk
->mp
->grp
.attrs
[i
] = &mk
->mp
->attrs
[i
].mattr
.attr
;
720 mk
->mp
->grp
.attrs
[mk
->mp
->num
] = NULL
;
724 #ifdef CONFIG_MODULES
725 static void free_module_param_attrs(struct module_kobject
*mk
)
728 kfree(mk
->mp
->grp
.attrs
);
734 * module_param_sysfs_setup - setup sysfs support for one module
736 * @kparam: module parameters (array)
737 * @num_params: number of module parameters
739 * Adds sysfs entries for module parameters under
740 * /sys/module/[mod->name]/parameters/
742 int module_param_sysfs_setup(struct module
*mod
,
743 const struct kernel_param
*kparam
,
744 unsigned int num_params
)
749 for (i
= 0; i
< num_params
; i
++) {
750 if (kparam
[i
].perm
== 0)
752 err
= add_sysfs_param(&mod
->mkobj
, &kparam
[i
], kparam
[i
].name
);
754 free_module_param_attrs(&mod
->mkobj
);
763 /* Create the param group. */
764 err
= sysfs_create_group(&mod
->mkobj
.kobj
, &mod
->mkobj
.mp
->grp
);
766 free_module_param_attrs(&mod
->mkobj
);
771 * module_param_sysfs_remove - remove sysfs support for one module
774 * Remove sysfs entries for module parameters and the corresponding
777 void module_param_sysfs_remove(struct module
*mod
)
780 sysfs_remove_group(&mod
->mkobj
.kobj
, &mod
->mkobj
.mp
->grp
);
781 /* We are positive that no one is using any param
782 * attrs at this point. Deallocate immediately. */
783 free_module_param_attrs(&mod
->mkobj
);
788 void destroy_params(const struct kernel_param
*params
, unsigned num
)
792 for (i
= 0; i
< num
; i
++)
793 if (params
[i
].ops
->free
)
794 params
[i
].ops
->free(params
[i
].arg
);
797 static struct module_kobject
* __init
locate_module_kobject(const char *name
)
799 struct module_kobject
*mk
;
800 struct kobject
*kobj
;
803 kobj
= kset_find_obj(module_kset
, name
);
805 mk
= to_module_kobject(kobj
);
807 mk
= kzalloc(sizeof(struct module_kobject
), GFP_KERNEL
);
810 mk
->mod
= THIS_MODULE
;
811 mk
->kobj
.kset
= module_kset
;
812 err
= kobject_init_and_add(&mk
->kobj
, &module_ktype
, NULL
,
814 #ifdef CONFIG_MODULES
816 err
= sysfs_create_file(&mk
->kobj
, &module_uevent
.attr
);
819 kobject_put(&mk
->kobj
);
820 pr_crit("Adding module '%s' to sysfs failed (%d), the system may be unstable.\n",
825 /* So that we hold reference in both cases. */
826 kobject_get(&mk
->kobj
);
832 static void __init
kernel_add_sysfs_param(const char *name
,
833 const struct kernel_param
*kparam
,
834 unsigned int name_skip
)
836 struct module_kobject
*mk
;
839 mk
= locate_module_kobject(name
);
843 /* We need to remove old parameters before adding more. */
845 sysfs_remove_group(&mk
->kobj
, &mk
->mp
->grp
);
847 /* These should not fail at boot. */
848 err
= add_sysfs_param(mk
, kparam
, kparam
->name
+ name_skip
);
850 err
= sysfs_create_group(&mk
->kobj
, &mk
->mp
->grp
);
852 kobject_uevent(&mk
->kobj
, KOBJ_ADD
);
853 kobject_put(&mk
->kobj
);
857 * param_sysfs_builtin - add sysfs parameters for built-in modules
859 * Add module_parameters to sysfs for "modules" built into the kernel.
861 * The "module" name (KBUILD_MODNAME) is stored before a dot, the
862 * "parameter" name is stored behind a dot in kernel_param->name. So,
863 * extract the "module" name for all built-in kernel_param-eters,
864 * and for all who have the same, call kernel_add_sysfs_param.
866 static void __init
param_sysfs_builtin(void)
868 const struct kernel_param
*kp
;
869 unsigned int name_len
;
870 char modname
[MODULE_NAME_LEN
];
872 for (kp
= __start___param
; kp
< __stop___param
; kp
++) {
878 dot
= strchr(kp
->name
, '.');
880 /* This happens for core_param() */
881 strcpy(modname
, "kernel");
884 name_len
= dot
- kp
->name
+ 1;
885 strlcpy(modname
, kp
->name
, name_len
);
887 kernel_add_sysfs_param(modname
, kp
, name_len
);
891 ssize_t
__modver_version_show(struct module_attribute
*mattr
,
892 struct module_kobject
*mk
, char *buf
)
894 struct module_version_attribute
*vattr
=
895 container_of(mattr
, struct module_version_attribute
, mattr
);
897 return scnprintf(buf
, PAGE_SIZE
, "%s\n", vattr
->version
);
900 extern const struct module_version_attribute
*__start___modver
[];
901 extern const struct module_version_attribute
*__stop___modver
[];
903 static void __init
version_sysfs_builtin(void)
905 const struct module_version_attribute
**p
;
906 struct module_kobject
*mk
;
909 for (p
= __start___modver
; p
< __stop___modver
; p
++) {
910 const struct module_version_attribute
*vattr
= *p
;
912 mk
= locate_module_kobject(vattr
->module_name
);
914 err
= sysfs_create_file(&mk
->kobj
, &vattr
->mattr
.attr
);
916 kobject_uevent(&mk
->kobj
, KOBJ_ADD
);
917 kobject_put(&mk
->kobj
);
922 /* module-related sysfs stuff */
924 static ssize_t
module_attr_show(struct kobject
*kobj
,
925 struct attribute
*attr
,
928 struct module_attribute
*attribute
;
929 struct module_kobject
*mk
;
932 attribute
= to_module_attr(attr
);
933 mk
= to_module_kobject(kobj
);
935 if (!attribute
->show
)
938 ret
= attribute
->show(attribute
, mk
, buf
);
943 static ssize_t
module_attr_store(struct kobject
*kobj
,
944 struct attribute
*attr
,
945 const char *buf
, size_t len
)
947 struct module_attribute
*attribute
;
948 struct module_kobject
*mk
;
951 attribute
= to_module_attr(attr
);
952 mk
= to_module_kobject(kobj
);
954 if (!attribute
->store
)
957 ret
= attribute
->store(attribute
, mk
, buf
, len
);
962 static const struct sysfs_ops module_sysfs_ops
= {
963 .show
= module_attr_show
,
964 .store
= module_attr_store
,
967 static int uevent_filter(struct kset
*kset
, struct kobject
*kobj
)
969 struct kobj_type
*ktype
= get_ktype(kobj
);
971 if (ktype
== &module_ktype
)
976 static const struct kset_uevent_ops module_uevent_ops
= {
977 .filter
= uevent_filter
,
980 struct kset
*module_kset
;
981 int module_sysfs_initialized
;
983 static void module_kobj_release(struct kobject
*kobj
)
985 struct module_kobject
*mk
= to_module_kobject(kobj
);
986 complete(mk
->kobj_completion
);
989 struct kobj_type module_ktype
= {
990 .release
= module_kobj_release
,
991 .sysfs_ops
= &module_sysfs_ops
,
995 * param_sysfs_init - wrapper for built-in params support
997 static int __init
param_sysfs_init(void)
999 module_kset
= kset_create_and_add("module", &module_uevent_ops
, NULL
);
1001 printk(KERN_WARNING
"%s (%d): error creating kset\n",
1002 __FILE__
, __LINE__
);
1005 module_sysfs_initialized
= 1;
1007 version_sysfs_builtin();
1008 param_sysfs_builtin();
1012 subsys_initcall(param_sysfs_init
);
1014 #endif /* CONFIG_SYSFS */