mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-04 09:34:12 +08:00
f515f192ab
Add a notifier block per DSA switch, registered against a notifier head in the switch fabric they belong to. This infrastructure will allow to propagate fabric-wide events such as port bridging, VLAN configuration, etc. If a DSA switch driver cares about cross-chip configuration, such events can be caught. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
|
|
* Handling of a single switch chip, part of a switch fabric
|
|
*
|
|
* Copyright (c) 2017 Vivien Didelot <vivien.didelot@savoirfairelinux.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/notifier.h>
|
|
#include <net/dsa.h>
|
|
|
|
static int dsa_switch_event(struct notifier_block *nb,
|
|
unsigned long event, void *info)
|
|
{
|
|
struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
|
|
int err;
|
|
|
|
switch (event) {
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
/* Non-switchdev operations cannot be rolled back. If a DSA driver
|
|
* returns an error during the chained call, switch chips may be in an
|
|
* inconsistent state.
|
|
*/
|
|
if (err)
|
|
dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
|
|
event, err);
|
|
|
|
return notifier_from_errno(err);
|
|
}
|
|
|
|
int dsa_switch_register_notifier(struct dsa_switch *ds)
|
|
{
|
|
ds->nb.notifier_call = dsa_switch_event;
|
|
|
|
return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
|
|
}
|
|
|
|
void dsa_switch_unregister_notifier(struct dsa_switch *ds)
|
|
{
|
|
int err;
|
|
|
|
err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb);
|
|
if (err)
|
|
dev_err(ds->dev, "failed to unregister notifier (%d)\n", err);
|
|
}
|