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Message-Id: <20170410115928.9344-2-idosch@idosch.org>
Date: Mon, 10 Apr 2017 14:59:27 +0300
From: idosch@...sch.org
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, stephen@...workplumber.org,
bridge@...ts.linux-foundation.org, mlxsw@...lanox.com,
peter@...nota.eu, nikolay@...ulusnetworks.com,
Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net v3 1/2] bridge: implement missing ndo_uninit()
From: Ido Schimmel <idosch@...lanox.com>
While the bridge driver implements an ndo_init(), it was missing a
symmetric ndo_uninit(), causing the different de-initialization
operations to be scattered around its dellink() and destructor().
Implement a symmetric ndo_uninit() and remove the overlapping operations
from its dellink() and destructor().
This is a prerequisite for the next patch, as it allows us to have a
proper cleanup upon changelink() failure during the bridge's newlink().
Fixes: b6677449dff6 ("bridge: netlink: call br_changelink() during br_dev_newlink()")
Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Signed-off-by: Ido Schimmel <idosch@...lanox.com>
---
v2->v3:
* Use free_netdev() for destructor()
v1->v2:
* New patch
net/bridge/br_device.c | 20 +++++++++++---------
net/bridge/br_if.c | 1 -
net/bridge/br_multicast.c | 7 +++++--
net/bridge/br_private.h | 5 +++++
4 files changed, 21 insertions(+), 12 deletions(-)
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index ea71513..90f49a1 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -119,6 +119,15 @@ static int br_dev_init(struct net_device *dev)
return err;
}
+static void br_dev_uninit(struct net_device *dev)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ br_multicast_uninit_stats(br);
+ br_vlan_flush(br);
+ free_percpu(br->stats);
+}
+
static int br_dev_open(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
@@ -332,6 +341,7 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_open = br_dev_open,
.ndo_stop = br_dev_stop,
.ndo_init = br_dev_init,
+ .ndo_uninit = br_dev_uninit,
.ndo_start_xmit = br_dev_xmit,
.ndo_get_stats64 = br_get_stats64,
.ndo_set_mac_address = br_set_mac_address,
@@ -356,14 +366,6 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_features_check = passthru_features_check,
};
-static void br_dev_free(struct net_device *dev)
-{
- struct net_bridge *br = netdev_priv(dev);
-
- free_percpu(br->stats);
- free_netdev(dev);
-}
-
static struct device_type br_type = {
.name = "bridge",
};
@@ -376,7 +378,7 @@ void br_dev_setup(struct net_device *dev)
ether_setup(dev);
dev->netdev_ops = &br_netdev_ops;
- dev->destructor = br_dev_free;
+ dev->destructor = free_netdev;
dev->ethtool_ops = &br_ethtool_ops;
SET_NETDEV_DEVTYPE(dev, &br_type);
dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 8ac1770..56a2a72 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -311,7 +311,6 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
br_fdb_delete_by_port(br, NULL, 0, 1);
- br_vlan_flush(br);
br_multicast_dev_del(br);
cancel_delayed_work_sync(&br->gc_work);
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index b760f26..faa7261 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -2031,8 +2031,6 @@ void br_multicast_dev_del(struct net_bridge *br)
out:
spin_unlock_bh(&br->multicast_lock);
-
- free_percpu(br->mcast_stats);
}
int br_multicast_set_router(struct net_bridge *br, unsigned long val)
@@ -2531,6 +2529,11 @@ int br_multicast_init_stats(struct net_bridge *br)
return 0;
}
+void br_multicast_uninit_stats(struct net_bridge *br)
+{
+ free_percpu(br->mcast_stats);
+}
+
static void mcast_stats_add_dir(u64 *dst, u64 *src)
{
dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 6136818..0d17728 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -620,6 +620,7 @@ void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
const struct sk_buff *skb, u8 type, u8 dir);
int br_multicast_init_stats(struct net_bridge *br);
+void br_multicast_uninit_stats(struct net_bridge *br);
void br_multicast_get_stats(const struct net_bridge *br,
const struct net_bridge_port *p,
struct br_mcast_stats *dest);
@@ -760,6 +761,10 @@ static inline int br_multicast_init_stats(struct net_bridge *br)
return 0;
}
+static inline void br_multicast_uninit_stats(struct net_bridge *br)
+{
+}
+
static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
return 0;
--
2.9.3
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