diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2025-03-20 19:22:38 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-24 13:58:22 -0700 |
| commit | c353e8983e0dea5dbba7789033326e1ad34135b7 (patch) | |
| tree | 7d6915e7a8f2ee733b75e96ac0793414841b54d3 /include/linux/netdevice.h | |
| parent | 29abdf662597ae2e8f34664a5e03f217e816a9a3 (diff) | |
net: introduce per netns packet chains
Currently network taps unbound to any interface are linked in the
global ptype_all list, affecting the performance in all the network
namespaces.
Add per netns ptypes chains, so that in the mentioned case only
the netns owning the packet socket(s) is affected.
While at that drop the global ptype_all list: no in kernel user
registers a tap on "any" type without specifying either the target
device or the target namespace (and IMHO doing that would not make
any sense).
Note that this adds a conditional in the fast path (to check for
per netns ptype_specific list) and increases the dataset size by
a cacheline (owing the per netns lists).
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumaze@google.com>
Link: https://patch.msgid.link/ae405f98875ee87f8150c460ad162de7e466f8a7.1742494826.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 0c5b1f7f8f3a..f22cca7c03ad 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -4278,7 +4278,17 @@ static __always_inline int ____dev_forward_skb(struct net_device *dev, return 0; } -bool dev_nit_active(struct net_device *dev); +bool dev_nit_active_rcu(const struct net_device *dev); +static inline bool dev_nit_active(const struct net_device *dev) +{ + bool ret; + + rcu_read_lock(); + ret = dev_nit_active_rcu(dev); + rcu_read_unlock(); + return ret; +} + void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); static inline void __dev_put(struct net_device *dev) |