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| author | Matt Johnston <matt@codeconstruct.com.au> | 2021-07-29 10:20:52 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-29 15:06:50 +0100 |
| commit | 03f2bbc4ee57ca53b2fa1d9caabc5006e0b8f375 (patch) | |
| tree | 488ab5b5447c4a2ca15c455f56e76f7485b1ba31 /net/mctp | |
| parent | 26ab3fcaf23568cc8fc06aeb9306f3544969f252 (diff) | |
| download | linux-03f2bbc4ee57ca53b2fa1d9caabc5006e0b8f375.tar.gz linux-03f2bbc4ee57ca53b2fa1d9caabc5006e0b8f375.tar.bz2 linux-03f2bbc4ee57ca53b2fa1d9caabc5006e0b8f375.zip | |
mctp: Allow per-netns default networks
Currently we have a compile-time default network
(MCTP_INITIAL_DEFAULT_NET). This change introduces a default_net field
on the net namespace, allowing future configuration for new interfaces.
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mctp')
| -rw-r--r-- | net/mctp/af_mctp.c | 3 | ||||
| -rw-r--r-- | net/mctp/device.c | 2 | ||||
| -rw-r--r-- | net/mctp/route.c | 14 |
3 files changed, 18 insertions, 1 deletions
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c index 9ca836df19d0..84f722d31fd7 100644 --- a/net/mctp/af_mctp.c +++ b/net/mctp/af_mctp.c @@ -94,6 +94,9 @@ static int mctp_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) if (!capable(CAP_NET_RAW)) return -EACCES; + if (addr->smctp_network == MCTP_NET_ANY) + addr->smctp_network = mctp_default_net(sock_net(sk)); + rt = mctp_route_lookup(sock_net(sk), addr->smctp_network, addr->smctp_addr.s_addr); if (!rt) diff --git a/net/mctp/device.c b/net/mctp/device.c index aa049590acda..b9f38e765f61 100644 --- a/net/mctp/device.c +++ b/net/mctp/device.c @@ -267,7 +267,7 @@ static struct mctp_dev *mctp_add_dev(struct net_device *dev) spin_lock_init(&mdev->addrs_lock); - mdev->net = MCTP_INITIAL_DEFAULT_NET; + mdev->net = mctp_default_net(dev_net(dev)); /* associate to net_device */ rcu_assign_pointer(dev->mctp_ptr, mdev); diff --git a/net/mctp/route.c b/net/mctp/route.c index 38f0a7278520..b3101375c8e7 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -433,6 +433,19 @@ static struct mctp_route *mctp_route_alloc(void) return rt; } +unsigned int mctp_default_net(struct net *net) +{ + return READ_ONCE(net->mctp.default_net); +} + +int mctp_default_net_set(struct net *net, unsigned int index) +{ + if (index == 0) + return -EINVAL; + WRITE_ONCE(net->mctp.default_net, index); + return 0; +} + /* tag management */ static void mctp_reserve_tag(struct net *net, struct mctp_sk_key *key, struct mctp_sock *msk) @@ -1045,6 +1058,7 @@ static int __net_init mctp_routes_net_init(struct net *net) mutex_init(&ns->bind_lock); INIT_HLIST_HEAD(&ns->keys); spin_lock_init(&ns->keys_lock); + WARN_ON(mctp_default_net_set(net, MCTP_INITIAL_DEFAULT_NET)); return 0; } |