[PATCH 1/4] net/tls: handle MSG_EOR for tls_sw TX flow

Hannes Reinecke
2023-06-09T12:52:11Z

tls_sw_sendmsg() / tls_do_sw_sendpage() already handles
MSG_MORE / MSG_SENDPAGE_NOTLAST, but bails out on MSG_EOR.
But seeing that MSG_EOR is basically the opposite of
MSG_MORE / MSG_SENDPAGE_NOTLAST this patch adds handling
MSG_EOR by treating it as the negation of MSG_MORE.

Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
net/tls/tls_sw.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 635b8bf6b937..be8e0459d403 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -953,9 +953,12 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
int pending;

if (msg->msg_flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
- MSG_CMSG_COMPAT))
+ MSG_EOR | MSG_CMSG_COMPAT))
return -EOPNOTSUPP;

+ if (msg->msg_flags & MSG_EOR)
+ eor = true;
+
ret = mutex_lock_interruptible(&tls_ctx->tx_lock);
if (ret)
return ret;
@@ -1173,6 +1176,8 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
bool eor;

eor = !(flags & MSG_SENDPAGE_NOTLAST);
+ if (flags & MSG_EOR)
+ eor = true;
sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);

/* Call the sk_stream functions to manage the sndbuf mem. */
@@ -1274,7 +1279,7 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
int offset, size_t size, int flags)
{
- if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+ if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_EOR |
MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY |
MSG_NO_SHARED_FRAGS))
return -EOPNOTSUPP;
@@ -1288,7 +1293,7 @@ int tls_sw_sendpage(struct sock *sk, struct page *page,
struct tls_context *tls_ctx = tls_get_ctx(sk);
int ret;

- if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL |
+ if (flags & ~(MSG_MORE | MSG_DONTWAIT | MSG_NOSIGNAL | MSG_EOR |
MSG_SENDPAGE_NOTLAST | MSG_SENDPAGE_NOPOLICY))
return -EOPNOTSUPP;

--
2.35.3