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

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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: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (split & trivial fix)
This commit is contained in:
Kay Sievers
2011-07-24 22:06:04 +09:30
committed by Rusty Russell
parent 4befb026cf
commit 88bfa32479
3 changed files with 22 additions and 0 deletions
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17
kernel/module.c
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@@ -975,10 +975,27 @@ static struct module_attribute 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[] = {
&modinfo_version,
&modinfo_srcversion,
&initstate,
&module_uevent,
#ifdef CONFIG_MODULE_UNLOAD
&refcnt,
#endif