Driver core: change add_uevent_var to use a struct
This changes the uevent buffer functions to use a struct instead of a
long list of parameters. It does no longer require the caller to do the
proper buffer termination and size accounting, which is currently wrong
in some places. It fixes a known bug where parts of the uevent
environment are overwritten because of wrong index calculations.
Many thanks to Mathieu Desnoyers for finding bugs and improving the
error handling.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 909a03d..6628e45 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -396,28 +396,22 @@
#endif /* CONFIG_SYSFS */
#ifdef CONFIG_HOTPLUG
-static int netdev_uevent(struct device *d, char **envp,
- int num_envp, char *buf, int size)
+static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
{
struct net_device *dev = to_net_dev(d);
- int retval, len = 0, i = 0;
+ int retval;
/* pass interface to uevent. */
- retval = add_uevent_var(envp, num_envp, &i,
- buf, size, &len,
- "INTERFACE=%s", dev->name);
+ retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
if (retval)
goto exit;
/* pass ifindex to uevent.
* ifindex is useful as it won't change (interface name may change)
* and is what RtNetlink uses natively. */
- retval = add_uevent_var(envp, num_envp, &i,
- buf, size, &len,
- "IFINDEX=%d", dev->ifindex);
+ retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
exit:
- envp[i] = NULL;
return retval;
}
#endif