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| author | Matt Johnston <matt@codeconstruct.com.au> | 2021-09-29 15:26:05 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-09-29 11:00:11 +0100 |
| commit | f364dd71d92fe6722fe5d47803be974dc0c40762 (patch) | |
| tree | 2ca01f13e26cf8d644c0f4e2a544de3c78e3c67f /net/mctp | |
| parent | 7c2dcfa295b149a58010632c7eb7e73bd0626a7a (diff) | |
| download | linux-f364dd71d92fe6722fe5d47803be974dc0c40762.tar.gz linux-f364dd71d92fe6722fe5d47803be974dc0c40762.tar.bz2 linux-f364dd71d92fe6722fe5d47803be974dc0c40762.zip | |
mctp: Allow MCTP on tun devices
Allowing TUN is useful for testing, to route packets to userspace or to
tunnel between machines.
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/device.c | 7 | ||||
| -rw-r--r-- | net/mctp/route.c | 13 |
2 files changed, 13 insertions, 7 deletions
diff --git a/net/mctp/device.c b/net/mctp/device.c index b9f38e765f61..c34963974cc1 100644 --- a/net/mctp/device.c +++ b/net/mctp/device.c @@ -356,9 +356,12 @@ static int mctp_register(struct net_device *dev) if (rtnl_dereference(dev->mctp_ptr)) return 0; - /* only register specific types; MCTP-specific and loopback for now */ - if (dev->type != ARPHRD_MCTP && dev->type != ARPHRD_LOOPBACK) + /* only register specific types (inc. NONE for TUN devices) */ + if (!(dev->type == ARPHRD_MCTP || + dev->type == ARPHRD_LOOPBACK || + dev->type == ARPHRD_NONE)) { return 0; + } mdev = mctp_add_dev(dev); if (IS_ERR(mdev)) diff --git a/net/mctp/route.c b/net/mctp/route.c index 5ca186d53cb0..a953f83ed02b 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -821,13 +821,18 @@ static int mctp_pkttype_receive(struct sk_buff *skb, struct net_device *dev, struct net_device *orig_dev) { struct net *net = dev_net(dev); + struct mctp_dev *mdev; struct mctp_skb_cb *cb; struct mctp_route *rt; struct mctp_hdr *mh; - /* basic non-data sanity checks */ - if (dev->type != ARPHRD_MCTP) + rcu_read_lock(); + mdev = __mctp_dev_get(dev); + rcu_read_unlock(); + if (!mdev) { + /* basic non-data sanity checks */ goto err_drop; + } if (!pskb_may_pull(skb, sizeof(struct mctp_hdr))) goto err_drop; @@ -841,9 +846,7 @@ static int mctp_pkttype_receive(struct sk_buff *skb, struct net_device *dev, goto err_drop; cb = __mctp_cb(skb); - rcu_read_lock(); - cb->net = READ_ONCE(__mctp_dev_get(dev)->net); - rcu_read_unlock(); + cb->net = READ_ONCE(mdev->net); rt = mctp_route_lookup(net, cb->net, mh->dest); if (!rt) |