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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2006-06-27 13:22:38 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-29 16:57:53 -0700 |
| commit | 576a30eb6453439b3c37ba24455ac7090c247b5a (patch) | |
| tree | e0c427a61e3de5c93e797c09903d910f6f060e64 /include/net | |
| parent | 68c1692e3ea5d79f24cb5cc566c4a73939d13d25 (diff) | |
| download | linux-576a30eb6453439b3c37ba24455ac7090c247b5a.tar.gz linux-576a30eb6453439b3c37ba24455ac7090c247b5a.tar.bz2 linux-576a30eb6453439b3c37ba24455ac7090c247b5a.zip | |
[NET]: Added GSO header verification
When GSO packets come from an untrusted source (e.g., a Xen guest domain),
we need to verify the header integrity before passing it to the hardware.
Since the first step in GSO is to verify the header, we can reuse that
code by adding a new bit to gso_type: SKB_GSO_DODGY. Packets with this
bit set can only be fed directly to devices with the corresponding bit
NETIF_F_GSO_ROBUST. If the device doesn't have that bit, then the skb
is fed to the GSO engine which will allow the packet to be sent to the
hardware if it passes the header check.
This patch changes the sg flag to a full features flag. The same method
can be used to implement TSO ECN support. We simply have to mark packets
with CWR set with SKB_GSO_ECN so that only hardware with a corresponding
NETIF_F_TSO_ECN can accept them. The GSO engine can either fully segment
the packet, or segment the first MTU and pass the rest to the hardware for
further segmentation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/protocol.h | 3 | ||||
| -rw-r--r-- | include/net/tcp.h | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/include/net/protocol.h b/include/net/protocol.h index 3b6dc15c68a5..40b6b9c9973f 100644 --- a/include/net/protocol.h +++ b/include/net/protocol.h @@ -36,7 +36,8 @@ struct net_protocol { int (*handler)(struct sk_buff *skb); void (*err_handler)(struct sk_buff *skb, u32 info); - struct sk_buff *(*gso_segment)(struct sk_buff *skb, int sg); + struct sk_buff *(*gso_segment)(struct sk_buff *skb, + int features); int no_policy; }; diff --git a/include/net/tcp.h b/include/net/tcp.h index ca3d38dfc00b..624921e76332 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1086,7 +1086,7 @@ extern struct request_sock_ops tcp_request_sock_ops; extern int tcp_v4_destroy_sock(struct sock *sk); -extern struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int sg); +extern struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features); #ifdef CONFIG_PROC_FS extern int tcp4_proc_init(void); |