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| author | Ilan Tayari <ilant@mellanox.com> | 2017-08-01 12:49:05 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-08-02 11:00:15 +0200 |
| commit | e51a64727079f46fc3a99f380de384d5ab01fffa (patch) | |
| tree | 4898eade0fed1b5bffdaccd9852ee7eeeb24baf8 | |
| parent | ec9567a9e008d1248e4d88f7ff1026ba68133621 (diff) | |
| download | linux-e51a64727079f46fc3a99f380de384d5ab01fffa.tar.gz linux-e51a64727079f46fc3a99f380de384d5ab01fffa.tar.bz2 linux-e51a64727079f46fc3a99f380de384d5ab01fffa.zip | |
esp6: Support RX checksum with crypto offload
Keep the device's reported ip_summed indication in case crypto
was offloaded by the device. Subtract the csum values of the
stripped parts (esp header+iv, esp trailer+auth_data) to keep
value correct.
Note: CHECKSUM_COMPLETE should be indicated only if skb->csum
has the post-decryption offload csum value.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
| -rw-r--r-- | net/ipv6/esp6.c | 14 | ||||
| -rw-r--r-- | net/ipv6/esp6_offload.c | 4 |
2 files changed, 14 insertions, 4 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 9ed35473dcb5..0ca1db62e381 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -470,7 +470,8 @@ int esp6_input_done2(struct sk_buff *skb, int err) int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead); int elen = skb->len - hlen; int hdr_len = skb_network_header_len(skb); - int padlen; + int padlen, trimlen; + __wsum csumdiff; u8 nexthdr[2]; if (!xo || (xo && !(xo->flags & CRYPTO_DONE))) @@ -492,8 +493,15 @@ int esp6_input_done2(struct sk_buff *skb, int err) /* ... check padding bits here. Silly. :-) */ - pskb_trim(skb, skb->len - alen - padlen - 2); - __skb_pull(skb, hlen); + trimlen = alen + padlen + 2; + if (skb->ip_summed == CHECKSUM_COMPLETE) { + csumdiff = skb_checksum(skb, skb->len - trimlen, trimlen, 0); + skb->csum = csum_block_sub(skb->csum, csumdiff, + skb->len - trimlen); + } + pskb_trim(skb, skb->len - trimlen); + + skb_pull_rcsum(skb, hlen); if (x->props.mode == XFRM_MODE_TUNNEL) skb_reset_transport_header(skb); else diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c index f02f131f6435..eec3add177fe 100644 --- a/net/ipv6/esp6_offload.c +++ b/net/ipv6/esp6_offload.c @@ -209,11 +209,13 @@ out: static int esp6_input_tail(struct xfrm_state *x, struct sk_buff *skb) { struct crypto_aead *aead = x->data; + struct xfrm_offload *xo = xfrm_offload(skb); if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead))) return -EINVAL; - skb->ip_summed = CHECKSUM_NONE; + if (!(xo->flags & CRYPTO_DONE)) + skb->ip_summed = CHECKSUM_NONE; return esp6_input_done2(skb, 0); } |