[PATCH V3 net-next 07/14] net/tls: Support TLS device offload with IPv6
From: Saeed Mahameed <hidden>
Date: 2018-03-22 22:34:29
Subsystem:
networking [general], networking [tls], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, John Fastabend, Sabrina Dubroca, Linus Torvalds
From: Ilya Lesokhin <redacted> Previously get_netdev_for_sock worked only with IPv4. Signed-off-by: Ilya Lesokhin <redacted> Signed-off-by: Boris Pismenny <redacted> Signed-off-by: Saeed Mahameed <redacted> --- net/tls/tls_device.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-)
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 34555ac0b959..f48c8b5d09c6 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c@@ -34,6 +34,11 @@ #include <net/inet_common.h> #include <linux/highmem.h> #include <linux/netdevice.h> +#include <net/addrconf.h> +#include <net/flow.h> +#include <linux/ipv6.h> +#include <net/dst.h> +#include <linux/security.h> #include <net/tls.h> #include <crypto/aead.h>
@@ -98,13 +103,57 @@ static void tls_device_queue_ctx_destruction(struct tls_context *ctx) spin_unlock_irqrestore(&tls_device_lock, flags); } +#if IS_ENABLED(CONFIG_IPV6) +static inline struct net_device *ipv6_get_netdev(struct sock *sk) +{ + struct net_device *dev = NULL; + struct inet_sock *inet = inet_sk(sk); + struct ipv6_pinfo *np = inet6_sk(sk); + struct flowi6 _fl6, *fl6 = &_fl6; + struct dst_entry *dst; + + memset(fl6, 0, sizeof(*fl6)); + fl6->flowi6_proto = sk->sk_protocol; + fl6->daddr = sk->sk_v6_daddr; + fl6->saddr = np->saddr; + fl6->flowlabel = np->flow_label; + IP6_ECN_flow_xmit(sk, fl6->flowlabel); + fl6->flowi6_oif = sk->sk_bound_dev_if; + fl6->flowi6_mark = sk->sk_mark; + fl6->fl6_sport = inet->inet_sport; + fl6->fl6_dport = inet->inet_dport; + fl6->flowi6_uid = sk->sk_uid; + security_sk_classify_flow(sk, flowi6_to_flowi(fl6)); + + if (ipv6_stub->ipv6_dst_lookup(sock_net(sk), sk, &dst, fl6) < 0) + return NULL; + + dev = dst->dev; + dev_hold(dev); + dst_release(dst); + + return dev; +} +#endif + /* We assume that the socket is already connected */ static struct net_device *get_netdev_for_sock(struct sock *sk) { struct inet_sock *inet = inet_sk(sk); struct net_device *netdev = NULL; - netdev = dev_get_by_index(sock_net(sk), inet->cork.fl.flowi_oif); + if (sk->sk_family == AF_INET) + netdev = dev_get_by_index(sock_net(sk), + inet->cork.fl.flowi_oif); +#if IS_ENABLED(CONFIG_IPV6) + else if (sk->sk_family == AF_INET6) { + netdev = ipv6_get_netdev(sk); + if (!netdev && !sk->sk_ipv6only && + ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) + netdev = dev_get_by_index(sock_net(sk), + inet->cork.fl.flowi_oif); + } +#endif return netdev; }
--
2.14.3