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tls: rx: clear ctx->recv_pkt earlier

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Whatever we do in the loop the skb should not remain on as
ctx->recv_pkt afterwards. We can clear that pointer and
restart strparser earlier.

This adds overhead of extra linking and unlinking to rx_list
but that's not large (upcoming change will switch to unlocked
skb list operations).

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2022-04-08 11:31:33 -07:00 committed by David S. Miller
parent 465ea73535
commit b1a2c17863
1 changed files with 7 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

16
net/tls/tls_sw.c
View file

@ -1826,6 +1826,10 @@ int tls_sw_recvmsg(struct sock *sk,
if (err <= 0)
goto recv_end;
ctx->recv_pkt = NULL;
__strp_unpause(&ctx->strp);
skb_queue_tail(&ctx->rx_list, skb);
if (async) {
/* TLS 1.2-only, to_decrypt must be text length */
chunk = min_t(int, to_decrypt, len);
@ -1840,10 +1844,9 @@ int tls_sw_recvmsg(struct sock *sk,
if (err != __SK_PASS) {
rxm->offset = rxm->offset + rxm->full_len;
rxm->full_len = 0;
skb_unlink(skb, &ctx->rx_list);
if (err == __SK_DROP)
consume_skb(skb);
ctx->recv_pkt = NULL;
__strp_unpause(&ctx->strp);
continue;
}
}
@ -1869,14 +1872,9 @@ int tls_sw_recvmsg(struct sock *sk,
len -= chunk;
/* For async or peek case, queue the current skb */
if (async || is_peek || retain_skb) {
skb_queue_tail(&ctx->rx_list, skb);
ctx->recv_pkt = NULL;
__strp_unpause(&ctx->strp);
} else {
if (!(async || is_peek || retain_skb)) {
skb_unlink(skb, &ctx->rx_list);
consume_skb(skb);
ctx->recv_pkt = NULL;
__strp_unpause(&ctx->strp);
/* Return full control message to
* userspace before trying to parse