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Driver core: let request_module() send a /sys/modules/kmod/-uevent

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On recent systems, calls to /sbin/modprobe are handled by udev depending
on the kind of device the kernel has discovered. This patch creates an
uevent for the kernels internal request_module(), to let udev take control
over the request, instead of forking the binary directly by the kernel.
The direct execution of /sbin/modprobe can be disabled by setting:
  /sys/module/kmod/mod_request_helper (/proc/sys/kernel/modprobe)
to an empty string, the same way /proc/sys/kernel/hotplug is disabled on an
udev system.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2007-02-02 16:39:12 +01:00 • committed by Greg Kroah-Hartman
parent 89790fd789
commit c353c3fb07
4 changed files with 139 additions and 10 deletions
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26
kernel/module.c
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@ -653,20 +653,11 @@ static void wait_for_zero_refcount(struct module *mod)
mutex_lock(&module_mutex);
}
asmlinkage long
sys_delete_module(const char __user *name_user, unsigned int flags)
int delete_module(const char *name, unsigned int flags)
{
struct module *mod;
char name[MODULE_NAME_LEN];
int ret, forced = 0;
if (!capable(CAP_SYS_MODULE))
return -EPERM;
if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
return -EFAULT;
name[MODULE_NAME_LEN-1] = '\0';
if (mutex_lock_interruptible(&module_mutex) != 0)
return -EINTR;
@ -727,6 +718,21 @@ sys_delete_module(const char __user *name_user, unsigned int flags)
return ret;
}
asmlinkage long
sys_delete_module(const char __user *name_user, unsigned int flags)
{
char name[MODULE_NAME_LEN];
if (!capable(CAP_SYS_MODULE))
return -EPERM;
if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
return -EFAULT;
name[MODULE_NAME_LEN-1] = '\0';
return delete_module(name, flags);
}
static void print_unload_info(struct seq_file *m, struct module *mod)
{
struct module_use *use;