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/net/net_namespace.h | |
| parent | tty: caif: removed unused function debugfs_tx() (diff) | |
| download | linux-c353e8983e0dea5dbba7789033326e1ad34135b7.tar.gz linux-c353e8983e0dea5dbba7789033326e1ad34135b7.zip | |
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/net/net_namespace.h')
| -rw-r--r-- | include/net/net_namespace.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index f467a66abc6b..bd57d8fb54f1 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -83,6 +83,9 @@ struct net { struct llist_node defer_free_list; struct llist_node cleanup_list; /* namespaces on death row */ + struct list_head ptype_all; + struct list_head ptype_specific; + #ifdef CONFIG_KEYS struct key_tag *key_domain; /* Key domain of operation tag */ #endif |