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nfp: tls: undo TLS sequence tracking when dropping the frame 

If driver has to drop the TLS frame it needs to undo the TCP
sequence tracking changes, otherwise device will receive
segments out of order and drop them.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.4-dsi
Jakub Kicinski 2019-07-08 19:53:17 -07:00 committed by David S. Miller
parent c8d3928ea7
commit 5a4cea280c
1 changed files with 23 additions and 0 deletions
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23
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -893,6 +893,28 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
return skb;
}
static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
{
#ifdef CONFIG_TLS_DEVICE
struct nfp_net_tls_offload_ctx *ntls;
u32 datalen, seq;
if (!tls_handle)
return;
if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
return;
datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
seq = ntohl(tcp_hdr(skb)->seq);
ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
if (ntls->next_seq == seq + datalen)
ntls->next_seq = seq;
else
WARN_ON_ONCE(1);
#endif
}
static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
{
wmb();
@ -1102,6 +1124,7 @@ err_flush:
u64_stats_update_begin(&r_vec->tx_sync);
r_vec->tx_errors++;
u64_stats_update_end(&r_vec->tx_sync);
nfp_net_tls_tx_undo(skb, tls_handle);
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}