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| author | Björn Töpel <bjorn.topel@intel.com> | 2019-01-24 19:59:37 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-01-25 01:50:03 +0100 |
| commit | 1d0dc06930a917eaca4156193c6c49f798b95ce7 (patch) | |
| tree | 135d2cef69bf73b12ed394b63a0a57fa8929b3c8 | |
| parent | 2f0921262ba943fe9d9f59037a033927d8c4789b (diff) | |
| download | linux-stable-1d0dc06930a917eaca4156193c6c49f798b95ce7.tar.gz linux-stable-1d0dc06930a917eaca4156193c6c49f798b95ce7.tar.bz2 linux-stable-1d0dc06930a917eaca4156193c6c49f798b95ce7.zip | |
net: xsk: track AF_XDP sockets on a per-netns list
Track each AF_XDP socket in a per-netns list. This will be used later
by the sock_diag interface for querying sockets from userspace.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
| -rw-r--r-- | include/net/net_namespace.h | 4 | ||||
| -rw-r--r-- | include/net/netns/xdp.h | 13 | ||||
| -rw-r--r-- | net/xdp/xsk.c | 30 |
3 files changed, 47 insertions, 0 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 99d4148e0f90..a68ced28d8f4 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -31,6 +31,7 @@ #include <net/netns/xfrm.h> #include <net/netns/mpls.h> #include <net/netns/can.h> +#include <net/netns/xdp.h> #include <linux/ns_common.h> #include <linux/idr.h> #include <linux/skbuff.h> @@ -161,6 +162,9 @@ struct net { #if IS_ENABLED(CONFIG_CAN) struct netns_can can; #endif +#ifdef CONFIG_XDP_SOCKETS + struct netns_xdp xdp; +#endif struct sock *diag_nlsk; atomic_t fnhe_genid; } __randomize_layout; diff --git a/include/net/netns/xdp.h b/include/net/netns/xdp.h new file mode 100644 index 000000000000..e5734261ba0a --- /dev/null +++ b/include/net/netns/xdp.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NETNS_XDP_H__ +#define __NETNS_XDP_H__ + +#include <linux/rculist.h> +#include <linux/mutex.h> + +struct netns_xdp { + struct mutex lock; + struct hlist_head list; +}; + +#endif /* __NETNS_XDP_H__ */ diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index a03268454a27..80ca48cefc42 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -350,6 +350,10 @@ static int xsk_release(struct socket *sock) net = sock_net(sk); + mutex_lock(&net->xdp.lock); + sk_del_node_init_rcu(sk); + mutex_unlock(&net->xdp.lock); + local_bh_disable(); sock_prot_inuse_add(net, sk->sk_prot, -1); local_bh_enable(); @@ -746,6 +750,10 @@ static int xsk_create(struct net *net, struct socket *sock, int protocol, mutex_init(&xs->mutex); spin_lock_init(&xs->tx_completion_lock); + mutex_lock(&net->xdp.lock); + sk_add_node_rcu(sk, &net->xdp.list); + mutex_unlock(&net->xdp.lock); + local_bh_disable(); sock_prot_inuse_add(net, &xsk_proto, 1); local_bh_enable(); @@ -759,6 +767,23 @@ static const struct net_proto_family xsk_family_ops = { .owner = THIS_MODULE, }; +static int __net_init xsk_net_init(struct net *net) +{ + mutex_init(&net->xdp.lock); + INIT_HLIST_HEAD(&net->xdp.list); + return 0; +} + +static void __net_exit xsk_net_exit(struct net *net) +{ + WARN_ON_ONCE(!hlist_empty(&net->xdp.list)); +} + +static struct pernet_operations xsk_net_ops = { + .init = xsk_net_init, + .exit = xsk_net_exit, +}; + static int __init xsk_init(void) { int err; @@ -771,8 +796,13 @@ static int __init xsk_init(void) if (err) goto out_proto; + err = register_pernet_subsys(&xsk_net_ops); + if (err) + goto out_sk; return 0; +out_sk: + sock_unregister(PF_XDP); out_proto: proto_unregister(&xsk_proto); out: |