Stephen Hemminger wrote:
> This is a split up of what Eric did with a couple of small changes and additions.
Something seems to be wrong with this patchset.
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
> @@ -173,8 +177,8 @@ forward:
> switch (p->state) {
> case BR_STATE_FORWARDING:
> rhook = rcu_dereference(br_should_route_hook);
> - if (rhook != NULL) {
> - if (rhook(skb))
> + if (rhook) {
> + if ((*rhook)(skb))
Is *rhook != NULL guaranteed when rhook != NULL?
> return skb;
> dest = eth_hdr(skb)->h_dest;
> }
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
> @@ -242,7 +242,7 @@ static void br_multicast_flood(struct ne
> if ((unsigned long)lport >= (unsigned long)port)
> p = rcu_dereference(p->next);
> if ((unsigned long)rport >= (unsigned long)port)
> - rp = rcu_dereference(rp->next);
> + rp = rcu_dereference(hlist_next_rcu(rp->next));
I think this one is hlist_next_rcu(rp).
> }
>
> if (!prev)
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
> @@ -475,11 +475,8 @@ int br_del_if(struct net_bridge *br, str
> {
> struct net_bridge_port *p;
>
> - if (!br_port_exists(dev))
> - return -EINVAL;
> -
> p = br_port_get(dev);
Don't you need to use br_port_get_rtnl()? (I don't know.)
> - if (p->br != br)
> + if (!p || p->br != br)
> return -EINVAL;
>
> del_nbp(p);
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
> @@ -169,9 +171,9 @@ static int br_rtm_setlink(struct sk_buff
> if (!dev)
> return -ENODEV;
>
> - if (!br_port_exists(dev))
> - return -EINVAL;
> p = br_port_get(dev);
Don't you need to use br_port_get_rtnl()? (I don't know.)
> + if (!p)
> + return -EINVAL;
>
> /* if kernel STP is running, don't allow changes */
> if (p->br->stp_enabled == BR_KERNEL_STP)
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
> @@ -151,11 +151,21 @@ struct net_bridge_port
> #endif
> };
>
> -#define br_port_get_rcu(dev) \
> - ((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
> -#define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
> #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
>
> +static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
> +{
> + return br_port_exists(dev) ?
> + rcu_dereference(dev->rx_handler_data) : NULL;
> +}
> +
> +static inline struct net_bridge_port *br_port_get(struct net_device *dev)
> +{
> + return br_port_exists(dev) ? dev->rx_handler_data : NULL;
> +}
> +
> +#define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
Why are you defining br_port_get() twice, once as macro and once as inlined
function?
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