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tls: rx: pull most of zc check out of the loop

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Most of the conditions deciding if zero-copy can be used
do not change throughout the iterations, so pre-calculate
them.

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 11:31:31 -07:00 committed by David S. Miller
parent 7da18bcc5e
commit ba13609df1
1 changed files with 5 additions and 4 deletions
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9
net/tls/tls_sw.c
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@ -1763,6 +1763,7 @@ int tls_sw_recvmsg(struct sock *sk,
bool is_kvec = iov_iter_is_kvec(&msg->msg_iter);
bool is_peek = flags & MSG_PEEK;
bool bpf_strp_enabled;
bool zc_capable;
flags |= nonblock;
@ -1788,6 +1789,8 @@ int tls_sw_recvmsg(struct sock *sk,
len = len - copied;
timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
zc_capable = !bpf_strp_enabled && !is_kvec && !is_peek &&
prot->version != TLS_1_3_VERSION;
decrypted = 0;
while (len && (decrypted + copied < target || ctx->recv_pkt)) {
struct tls_decrypt_arg darg = {};
@ -1814,10 +1817,8 @@ int tls_sw_recvmsg(struct sock *sk,
to_decrypt = rxm->full_len - prot->overhead_size;
if (to_decrypt <= len && !is_kvec && !is_peek &&
tlm->control == TLS_RECORD_TYPE_DATA &&
prot->version != TLS_1_3_VERSION &&
!bpf_strp_enabled)
if (zc_capable && to_decrypt <= len &&
tlm->control == TLS_RECORD_TYPE_DATA)
darg.zc = true;
/* Do not use async mode if record is non-data */