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Driver core: change add_uevent_var to use a struct

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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>
This commit is contained in:
Kay Sievers 2007-08-14 15:15:12 +02:00 • committed by Greg Kroah-Hartman
parent 8380770c84
commit 7eff2e7a8b
47 changed files with 300 additions and 636 deletions
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14
net/core/net-sysfs.c
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@ -396,28 +396,22 @@ static struct attribute_group wireless_group = {
#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