diff options
| author | Ilya Lesokhin <ilyal@mellanox.com> | 2018-04-30 10:16:12 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-01 09:42:46 -0400 |
| commit | ebf4e808fa0b22e551baf862e17c26c325c068f4 (patch) | |
| tree | b2e673a3847e61d60a6ce2e50860bdba771202e5 | |
| parent | 08303c189581c985e60f588ad92a041e46b6e307 (diff) | |
| download | linux-ebf4e808fa0b22e551baf862e17c26c325c068f4.tar.gz linux-ebf4e808fa0b22e551baf862e17c26c325c068f4.tar.bz2 linux-ebf4e808fa0b22e551baf862e17c26c325c068f4.zip | |
net: Add Software fallback infrastructure for socket dependent offloads
With socket dependent offloads we rely on the netdev to transform
the transmitted packets before sending them to the wire.
When a packet from an offloaded socket is rerouted to a different
device we need to detect it and do the transformation in software.
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/sock.h | 21 | ||||
| -rw-r--r-- | net/Kconfig | 3 | ||||
| -rw-r--r-- | net/core/dev.c | 4 |
3 files changed, 28 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 74d725fdbe0f..3c568b36ee36 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -481,6 +481,11 @@ struct sock { void (*sk_error_report)(struct sock *sk); int (*sk_backlog_rcv)(struct sock *sk, struct sk_buff *skb); +#ifdef CONFIG_SOCK_VALIDATE_XMIT + struct sk_buff* (*sk_validate_xmit_skb)(struct sock *sk, + struct net_device *dev, + struct sk_buff *skb); +#endif void (*sk_destruct)(struct sock *sk); struct sock_reuseport __rcu *sk_reuseport_cb; struct rcu_head sk_rcu; @@ -2332,6 +2337,22 @@ static inline bool sk_fullsock(const struct sock *sk) return (1 << sk->sk_state) & ~(TCPF_TIME_WAIT | TCPF_NEW_SYN_RECV); } +/* Checks if this SKB belongs to an HW offloaded socket + * and whether any SW fallbacks are required based on dev. + */ +static inline struct sk_buff *sk_validate_xmit_skb(struct sk_buff *skb, + struct net_device *dev) +{ +#ifdef CONFIG_SOCK_VALIDATE_XMIT + struct sock *sk = skb->sk; + + if (sk && sk_fullsock(sk) && sk->sk_validate_xmit_skb) + skb = sk->sk_validate_xmit_skb(sk, dev, skb); +#endif + + return skb; +} + /* This helper checks if a socket is a LISTEN or NEW_SYN_RECV * SYNACK messages can be attached to either ones (depending on SYNCOOKIE) */ diff --git a/net/Kconfig b/net/Kconfig index 6fa1a4493b8c..b62089fb1332 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -407,6 +407,9 @@ config GRO_CELLS bool default n +config SOCK_VALIDATE_XMIT + bool + config NET_DEVLINK tristate "Network physical/parent device Netlink interface" help diff --git a/net/core/dev.c b/net/core/dev.c index e01c21a88cae..8944e1e0059d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3112,6 +3112,10 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device if (unlikely(!skb)) goto out_null; + skb = sk_validate_xmit_skb(skb, dev); + if (unlikely(!skb)) + goto out_null; + if (netif_needs_gso(skb, features)) { struct sk_buff *segs; |