diff options
| author | Steffen Klassert <steffen.klassert@secunet.com> | 2017-02-15 09:40:00 +0100 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-02-15 11:04:11 +0100 |
| commit | 7785bba299a8dc8fe8390a0183dad3cafb3f1d80 (patch) | |
| tree | 33c29b31f0e66433b340998aa822bebe322aa116 /net/xfrm/xfrm_input.c | |
| parent | 54ef207ac8f7a17d677082157a29f4df8499dc81 (diff) | |
| download | linux-7785bba299a8dc8fe8390a0183dad3cafb3f1d80.tar.gz | |
esp: Add a software GRO codepath
This patch adds GRO ifrastructure and callbacks for ESP on
ipv4 and ipv6.
In case the GRO layer detects an ESP packet, the
esp{4,6}_gro_receive() function does a xfrm state lookup
and calls the xfrm input layer if it finds a matching state.
The packet will be decapsulated and reinjected it into layer 2.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_input.c')
| -rw-r--r-- | net/xfrm/xfrm_input.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index d2ff71230864..46bdb4fbed0b 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -207,14 +207,23 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) unsigned int family; int decaps = 0; int async = 0; + struct xfrm_offload *xo; + bool xfrm_gro = false; - /* A negative encap_type indicates async resumption. */ if (encap_type < 0) { - async = 1; x = xfrm_input_state(skb); - seq = XFRM_SKB_CB(skb)->seq.input.low; family = x->outer_mode->afinfo->family; - goto resume; + + /* An encap_type of -1 indicates async resumption. */ + if (encap_type == -1) { + async = 1; + seq = XFRM_SKB_CB(skb)->seq.input.low; + goto resume; + } + /* encap_type < -1 indicates a GRO call. */ + encap_type = 0; + seq = XFRM_SPI_SKB_CB(skb)->seq; + goto lock; } daddr = (xfrm_address_t *)(skb_network_header(skb) + @@ -260,6 +269,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) skb->sp->xvec[skb->sp->len++] = x; +lock: spin_lock(&x->lock); if (unlikely(x->km.state != XFRM_STATE_VALID)) { @@ -381,7 +391,18 @@ resume: gro_cells_receive(&gro_cells, skb); return 0; } else { - return x->inner_mode->afinfo->transport_finish(skb, async); + xo = xfrm_offload(skb); + if (xo) + xfrm_gro = xo->flags & XFRM_GRO; + + err = x->inner_mode->afinfo->transport_finish(skb, async); + if (xfrm_gro) { + skb_dst_drop(skb); + gro_cells_receive(&gro_cells, skb); + return err; + } + + return err; } drop_unlock: |