diff options
| author | Steffen Klassert <steffen.klassert@secunet.com> | 2017-12-20 12:41:36 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-12-20 12:41:36 +0300 |
| commit | f53c723902d1ac5f0b0a11d7c9dcbff748dde74e (patch) | |
| tree | 50841e9a0ff29530ee84e262857333925e09f2ff /net/ipv4/esp4.c | |
| parent | 3dca3f38cfb8efb8571040568cac7d0025fa5bb1 (diff) | |
| download | linux-f53c723902d1ac5f0b0a11d7c9dcbff748dde74e.tar.xz | |
net: Add asynchronous callbacks for xfrm on layer 2.
This patch implements asynchronous crypto callbacks
and a backlog handler that can be used when IPsec
is done at layer 2 in the TX path. It also extends
the skb validate functions so that we can update
the driver transmit return codes based on async
crypto operation or to indicate that we queued the
packet in a backlog queue.
Joint work with: Aviv Heller <avivh@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4/esp4.c')
| -rw-r--r-- | net/ipv4/esp4.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index d57aa64fa7c7..7948833dc204 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -121,14 +121,32 @@ static void esp_ssg_unref(struct xfrm_state *x, void *tmp) static void esp_output_done(struct crypto_async_request *base, int err) { struct sk_buff *skb = base->data; + struct xfrm_offload *xo = xfrm_offload(skb); void *tmp; - struct dst_entry *dst = skb_dst(skb); - struct xfrm_state *x = dst->xfrm; + struct xfrm_state *x; + + if (xo && (xo->flags & XFRM_DEV_RESUME)) + x = skb->sp->xvec[skb->sp->len - 1]; + else + x = skb_dst(skb)->xfrm; tmp = ESP_SKB_CB(skb)->tmp; esp_ssg_unref(x, tmp); kfree(tmp); - xfrm_output_resume(skb, err); + + if (xo && (xo->flags & XFRM_DEV_RESUME)) { + if (err) { + XFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR); + kfree_skb(skb); + return; + } + + skb_push(skb, skb->data - skb_mac_header(skb)); + secpath_reset(skb); + xfrm_dev_resume(skb); + } else { + xfrm_output_resume(skb, err); + } } /* Move ESP header back into place. */ |