luck/tmp_suning_uos_patched
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hsr: use upper/lower device infrastructure

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netdev_upper_dev_link() is useful to manage lower/upper interfaces.
And this function internally validates looping, maximum depth.
All or most virtual interfaces that could have a real interface
(e.g. macsec, macvlan, ipvlan etc.) use lower/upper infrastructure.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taehee Yoo 2020-02-28 18:02:10 +00:00 committed by David S. Miller
parent 81390d0c4e
commit e0a4b99773
3 changed files with 40 additions and 30 deletions
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32
net/hsr/hsr_device.c
View File

@ -341,22 +341,33 @@ static void hsr_announce(struct timer_list *t)
rcu_read_unlock();
}
static void hsr_del_ports(struct hsr_priv *hsr)
{
struct hsr_port *port;
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
if (port)
hsr_del_port(port);
port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
if (port)
hsr_del_port(port);
port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
if (port)
hsr_del_port(port);
}
/* This has to be called after all the readers are gone.
* Otherwise we would have to check the return value of
* hsr_port_get_hsr().
*/
static void hsr_dev_destroy(struct net_device *hsr_dev)
{
struct hsr_priv *hsr;
struct hsr_port *port;
struct hsr_port *tmp;
hsr = netdev_priv(hsr_dev);
struct hsr_priv *hsr = netdev_priv(hsr_dev);
hsr_debugfs_term(hsr);
list_for_each_entry_safe(port, tmp, &hsr->ports, port_list)
hsr_del_port(port);
hsr_del_ports(hsr);
del_timer_sync(&hsr->prune_timer);
del_timer_sync(&hsr->announce_timer);
@ -426,8 +437,6 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
struct netlink_ext_ack *extack)
{
struct hsr_priv *hsr;
struct hsr_port *port;
struct hsr_port *tmp;
int res;
hsr = netdev_priv(hsr_dev);
@ -494,8 +503,7 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
err_add_slaves:
unregister_netdevice(hsr_dev);
err_unregister:
list_for_each_entry_safe(port, tmp, &hsr->ports, port_list)
hsr_del_port(port);
hsr_del_ports(hsr);
err_add_master:
hsr_del_self_node(hsr);

3
net/hsr/hsr_main.c
View File

@ -85,7 +85,8 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
master->dev->mtu = mtu_max;
break;
case NETDEV_UNREGISTER:
hsr_del_port(port);
if (!is_hsr_master(dev))
hsr_del_port(port);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* HSR works only on Ethernet devices. Refuse slave to change

35
net/hsr/hsr_slave.c
View File

@ -97,19 +97,25 @@ static int hsr_check_dev_ok(struct net_device *dev,
}
/* Setup device to be added to the HSR bridge. */
static int hsr_portdev_setup(struct net_device *dev, struct hsr_port *port)
static int hsr_portdev_setup(struct hsr_priv *hsr, struct net_device *dev,
struct hsr_port *port,
struct netlink_ext_ack *extack)
{
struct net_device *hsr_dev;
struct hsr_port *master;
int res;
dev_hold(dev);
res = dev_set_promiscuity(dev, 1);
if (res)
goto fail_promiscuity;
/* FIXME:
* What does net device "adjacency" mean? Should we do
* res = netdev_master_upper_dev_link(port->dev, port->hsr->dev); ?
*/
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
hsr_dev = master->dev;
res = netdev_upper_dev_link(dev, hsr_dev, extack);
if (res)
goto fail_upper_dev_link;
res = netdev_rx_handler_register(dev, hsr_handle_frame, port);
if (res)
@ -119,6 +125,8 @@ static int hsr_portdev_setup(struct net_device *dev, struct hsr_port *port)
return 0;
fail_rx_handler:
netdev_upper_dev_unlink(dev, hsr_dev);
fail_upper_dev_link:
dev_set_promiscuity(dev, -1);
fail_promiscuity:
dev_put(dev);
@ -147,7 +155,7 @@ int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev,
return -ENOMEM;
if (type != HSR_PT_MASTER) {
res = hsr_portdev_setup(dev, port);
res = hsr_portdev_setup(hsr, dev, port, extack);
if (res)
goto fail_dev_setup;
}
@ -180,21 +188,14 @@ void hsr_del_port(struct hsr_port *port)
list_del_rcu(&port->port_list);
if (port != master) {
if (master) {
netdev_update_features(master->dev);
dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
}
netdev_update_features(master->dev);
dev_set_mtu(master->dev, hsr_get_max_mtu(hsr));
netdev_rx_handler_unregister(port->dev);
dev_set_promiscuity(port->dev, -1);
netdev_upper_dev_unlink(port->dev, master->dev);
}
/* FIXME?
* netdev_upper_dev_unlink(port->dev, port->hsr->dev);
*/
synchronize_rcu();
if (port != master)
dev_put(port->dev);
kfree(port);
}