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authorTaehee Yoo <ap420073@gmail.com>2020-02-28 21:02:10 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-01 08:37:03 +0300
commite0a4b99773d3d8d3fb40087805f8fd858a23e582 (patch)
treeb0be89db312dca6289579c56a8259177aa1c2c6b /net
parent81390d0c4e56ac7752c97d7e8209357673d1a8ab (diff)
downloadlinux-e0a4b99773d3d8d3fb40087805f8fd858a23e582.tar.xz
hsr: use upper/lower device infrastructure
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>
Diffstat (limited to 'net')
-rw-r--r--net/hsr/hsr_device.c32
-rw-r--r--net/hsr/hsr_main.c3
-rw-r--r--net/hsr/hsr_slave.c35
3 files changed, 40 insertions, 30 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index 00532d14fc7c..fc7027314ad8 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -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);
diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c
index 9e389accbfc7..26d6c39f24e1 100644
--- a/net/hsr/hsr_main.c
+++ b/net/hsr/hsr_main.c
@@ -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
diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c
index 07edc7f626fe..123605cb5420 100644
--- a/net/hsr/hsr_slave.c
+++ b/net/hsr/hsr_slave.c
@@ -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);
}