Commit 88bfa324 authored by Kay Sievers's avatar Kay Sievers Committed by Rusty Russell

module: add /sys/module/<name>/uevent files

Userspace wants to manage module parameters with udev rules.
This currently only works for loaded modules, but not for
built-in ones.

To allow access to the built-in modules we need to
re-trigger all module load events that happened before any
userspace was running. We already do the same thing for all
devices, subsystems(buses) and drivers.

This adds the currently missing /sys/module/<name>/uevent files
to all module entries.
Signed-off-by: default avatarKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (split & trivial fix)
parent 4befb026
...@@ -75,6 +75,7 @@ struct module_version_attribute { ...@@ -75,6 +75,7 @@ struct module_version_attribute {
extern ssize_t __modver_version_show(struct module_attribute *, extern ssize_t __modver_version_show(struct module_attribute *,
struct module_kobject *, char *); struct module_kobject *, char *);
extern struct module_attribute module_uevent;
/* These are either module local, or the kernel's dummy ones. */ /* These are either module local, or the kernel's dummy ones. */
extern int init_module(void); extern int init_module(void);
......
...@@ -975,10 +975,27 @@ static struct module_attribute initstate = { ...@@ -975,10 +975,27 @@ static struct module_attribute initstate = {
.show = show_initstate, .show = show_initstate,
}; };
static ssize_t store_uevent(struct module_attribute *mattr,
struct module_kobject *mk,
const char *buffer, size_t count)
{
enum kobject_action action;
if (kobject_action_type(buffer, count, &action) == 0)
kobject_uevent(&mk->kobj, action);
return count;
}
struct module_attribute module_uevent = {
.attr = { .name = "uevent", .mode = 0200 },
.store = store_uevent,
};
static struct module_attribute *modinfo_attrs[] = { static struct module_attribute *modinfo_attrs[] = {
&modinfo_version, &modinfo_version,
&modinfo_srcversion, &modinfo_srcversion,
&initstate, &initstate,
&module_uevent,
#ifdef CONFIG_MODULE_UNLOAD #ifdef CONFIG_MODULE_UNLOAD
&refcnt, &refcnt,
#endif #endif
......
...@@ -730,6 +730,10 @@ static struct module_kobject * __init locate_module_kobject(const char *name) ...@@ -730,6 +730,10 @@ static struct module_kobject * __init locate_module_kobject(const char *name)
mk->kobj.kset = module_kset; mk->kobj.kset = module_kset;
err = kobject_init_and_add(&mk->kobj, &module_ktype, NULL, err = kobject_init_and_add(&mk->kobj, &module_ktype, NULL,
"%s", name); "%s", name);
#ifdef CONFIG_MODULES
if (!err)
err = sysfs_create_file(&mk->kobj, &module_uevent.attr);
#endif
if (err) { if (err) {
kobject_put(&mk->kobj); kobject_put(&mk->kobj);
printk(KERN_ERR printk(KERN_ERR
......
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