[PATCH 5.12 241/296] tls splice: check SPLICE_F_NONBLOCK instead of MSG_DONTWAIT

Greg Kroah-Hartman
2021-05-31T16:43:24Z

From: Jim Ma <majinjing3@gmail.com>

[ Upstream commit 974271e5ed45cfe4daddbeb16224a2156918530e ]

In tls_sw_splice_read, checkout MSG_* is inappropriate, should use
SPLICE_*, update tls_wait_data to accept nonblock arguments instead
of flags for recvmsg and splice.

Fixes: c46234ebb4d1 ("tls: RX path for ktls")
Signed-off-by: Jim Ma <majinjing3@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/tls/tls_sw.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 01d933ae5f16..6086cf4f10a7 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -37,6 +37,7 @@

#include <linux/sched/signal.h>
#include <linux/module.h>
+#include <linux/splice.h>
#include <crypto/aead.h>

#include <net/strparser.h>
@@ -1281,7 +1282,7 @@ int tls_sw_sendpage(struct sock *sk, struct page *page,
}

static struct sk_buff *tls_wait_data(struct sock *sk, struct sk_psock *psock,
- int flags, long timeo, int *err)
+ bool nonblock, long timeo, int *err)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
@@ -1306,7 +1307,7 @@ static struct sk_buff *tls_wait_data(struct sock *sk, struct sk_psock *psock,
if (sock_flag(sk, SOCK_DONE))
return NULL;

- if ((flags & MSG_DONTWAIT) || !timeo) {
+ if (nonblock || !timeo) {
*err = -EAGAIN;
return NULL;
}
@@ -1786,7 +1787,7 @@ int tls_sw_recvmsg(struct sock *sk,
bool async_capable;
bool async = false;

- skb = tls_wait_data(sk, psock, flags, timeo, &err);
+ skb = tls_wait_data(sk, psock, flags & MSG_DONTWAIT, timeo, &err);
if (!skb) {
if (psock) {
int ret = __tcp_bpf_recvmsg(sk, psock,
@@ -1990,9 +1991,9 @@ ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,

lock_sock(sk);

- timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
+ timeo = sock_rcvtimeo(sk, flags & SPLICE_F_NONBLOCK);

- skb = tls_wait_data(sk, NULL, flags, timeo, &err);
+ skb = tls_wait_data(sk, NULL, flags & SPLICE_F_NONBLOCK, timeo, &err);
if (!skb)
goto splice_read_end;

--
2.30.2