From: Arseny Krasnov <arseny.krasnov@kaspersky.com>
To: Stefan Hajnoczi <stefanha@redhat.com>,
Stefano Garzarella <sgarzare@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Arseny Krasnov <arseny.krasnov@kaspersky.com>,
Jorgen Hansen <jhansen@vmware.com>,
Andra Paraschiv <andraprs@amazon.com>,
Norbert Slusarek <nslusarek@gmx.net>,
Colin Ian King <colin.king@canonical.com>
Cc: <kvm@vger.kernel.org>,
<virtualization@lists.linux-foundation.org>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<stsp2@yandex.ru>, <oxffffaa@gmail.com>
Subject: [RFC PATCH v6 05/22] af_vsock: separate wait space loop
Date: Sun, 7 Mar 2021 20:59:59 +0300 [thread overview]
Message-ID: <20210307180002.3464999-1-arseny.krasnov@kaspersky.com> (raw)
In-Reply-To: <20210307175722.3464068-1-arseny.krasnov@kaspersky.com>
This moves loop that waits for space on send to separate function,
because it will be used for SEQ_BEGIN/SEQ_END sending before and
after data transmission. Waiting for SEQ_BEGIN/SEQ_END is needed
because such packets carries SEQPACKET header that couldn't be
fragmented by credit mechanism, so to avoid it, sender waits until
enough space will be ready.
Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
---
include/net/af_vsock.h | 2 +
net/vmw_vsock/af_vsock.c | 99 +++++++++++++++++++++++++---------------
2 files changed, 63 insertions(+), 38 deletions(-)
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 5ad7ee7f78fd..a8c4039e40cf 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -205,6 +205,8 @@ void vsock_remove_sock(struct vsock_sock *vsk);
void vsock_for_each_connected_socket(void (*fn)(struct sock *sk));
int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk);
bool vsock_find_cid(unsigned int cid);
+int vsock_wait_space(struct sock *sk, size_t space, int flags,
+ struct vsock_transport_send_notify_data *send_data);
/**** TAP ****/
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index ac2f69362f2e..5bf64a3e678a 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1692,6 +1692,65 @@ static int vsock_connectible_getsockopt(struct socket *sock,
return 0;
}
+int vsock_wait_space(struct sock *sk, size_t space, int flags,
+ struct vsock_transport_send_notify_data *send_data)
+{
+ const struct vsock_transport *transport;
+ struct vsock_sock *vsk;
+ long timeout;
+ int err;
+
+ DEFINE_WAIT_FUNC(wait, woken_wake_function);
+
+ vsk = vsock_sk(sk);
+ transport = vsk->transport;
+ timeout = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
+ err = 0;
+
+ add_wait_queue(sk_sleep(sk), &wait);
+
+ while (vsock_stream_has_space(vsk) < space &&
+ sk->sk_err == 0 &&
+ !(sk->sk_shutdown & SEND_SHUTDOWN) &&
+ !(vsk->peer_shutdown & RCV_SHUTDOWN)) {
+
+ /* Don't wait for non-blocking sockets. */
+ if (timeout == 0) {
+ err = -EAGAIN;
+ goto out_err;
+ }
+
+ if (send_data) {
+ err = transport->notify_send_pre_block(vsk, send_data);
+ if (err < 0)
+ goto out_err;
+ }
+
+ release_sock(sk);
+ timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout);
+ lock_sock(sk);
+ if (signal_pending(current)) {
+ err = sock_intr_errno(timeout);
+ goto out_err;
+ } else if (timeout == 0) {
+ err = -EAGAIN;
+ goto out_err;
+ }
+ }
+
+ if (sk->sk_err) {
+ err = -sk->sk_err;
+ } else if ((sk->sk_shutdown & SEND_SHUTDOWN) ||
+ (vsk->peer_shutdown & RCV_SHUTDOWN)) {
+ err = -EPIPE;
+ }
+
+out_err:
+ remove_wait_queue(sk_sleep(sk), &wait);
+ return err;
+}
+EXPORT_SYMBOL_GPL(vsock_wait_space);
+
static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
@@ -1699,10 +1758,8 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
struct vsock_sock *vsk;
const struct vsock_transport *transport;
ssize_t total_written;
- long timeout;
int err;
struct vsock_transport_send_notify_data send_data;
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
sk = sock->sk;
vsk = vsock_sk(sk);
@@ -1740,9 +1797,6 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
goto out;
}
- /* Wait for room in the produce queue to enqueue our user's data. */
- timeout = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
-
err = transport->notify_send_init(vsk, &send_data);
if (err < 0)
goto out;
@@ -1750,39 +1804,8 @@ static int vsock_connectible_sendmsg(struct socket *sock, struct msghdr *msg,
while (total_written < len) {
ssize_t written;
- add_wait_queue(sk_sleep(sk), &wait);
- while (vsock_stream_has_space(vsk) == 0 &&
- sk->sk_err == 0 &&
- !(sk->sk_shutdown & SEND_SHUTDOWN) &&
- !(vsk->peer_shutdown & RCV_SHUTDOWN)) {
-
- /* Don't wait for non-blocking sockets. */
- if (timeout == 0) {
- err = -EAGAIN;
- remove_wait_queue(sk_sleep(sk), &wait);
- goto out_err;
- }
-
- err = transport->notify_send_pre_block(vsk, &send_data);
- if (err < 0) {
- remove_wait_queue(sk_sleep(sk), &wait);
- goto out_err;
- }
-
- release_sock(sk);
- timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout);
- lock_sock(sk);
- if (signal_pending(current)) {
- err = sock_intr_errno(timeout);
- remove_wait_queue(sk_sleep(sk), &wait);
- goto out_err;
- } else if (timeout == 0) {
- err = -EAGAIN;
- remove_wait_queue(sk_sleep(sk), &wait);
- goto out_err;
- }
- }
- remove_wait_queue(sk_sleep(sk), &wait);
+ if (vsock_wait_space(sk, 1, msg->msg_flags, &send_data))
+ goto out_err;
/* These checks occur both as part of and after the loop
* conditional since we need to check before and after
--
2.25.1
next prev parent reply other threads:[~2021-03-07 18:01 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-07 17:57 [RFC PATCH v6 00/22] virtio/vsock: introduce SOCK_SEQPACKET support Arseny Krasnov
2021-03-07 17:58 ` [RFC PATCH v6 01/22] af_vsock: update functions for connectible socket Arseny Krasnov
2021-03-12 14:38 ` Stefano Garzarella
2021-03-07 17:59 ` [RFC PATCH v6 02/22] af_vsock: separate wait data loop Arseny Krasnov
2021-03-12 14:40 ` Stefano Garzarella
2021-03-07 17:59 ` [RFC PATCH v6 03/22] af_vsock: separate receive " Arseny Krasnov
2021-03-07 17:59 ` [RFC PATCH v6 04/22] af_vsock: implement SEQPACKET receive loop Arseny Krasnov
2021-03-12 15:01 ` Stefano Garzarella
2021-03-12 15:17 ` Stefano Garzarella
2021-03-15 7:49 ` Arseny Krasnov
2021-03-07 17:59 ` Arseny Krasnov [this message]
2021-03-07 18:00 ` [RFC PATCH v6 06/22] af_vsock: implement send logic for SEQPACKET Arseny Krasnov
2021-03-12 15:10 ` Stefano Garzarella
2021-03-15 7:49 ` Arseny Krasnov
2021-03-07 18:00 ` [RFC PATCH v6 07/22] af_vsock: rest of SEQPACKET support Arseny Krasnov
2021-03-12 15:28 ` Stefano Garzarella
2021-03-07 18:01 ` [RFC PATCH v6 08/22] af_vsock: update comments for stream sockets Arseny Krasnov
2021-03-12 15:29 ` Stefano Garzarella
2021-03-07 18:01 ` [RFC PATCH v6 09/22] virtio/vsock: set packet's type in virtio_transport_send_pkt_info() Arseny Krasnov
2021-03-12 15:31 ` Stefano Garzarella
2021-03-07 18:01 ` [RFC PATCH v6 10/22] virtio/vsock: simplify credit update function API Arseny Krasnov
2021-03-12 15:33 ` Stefano Garzarella
2021-03-07 18:02 ` [RFC PATCH v6 11/22] virtio/vsock: dequeue callback for SOCK_SEQPACKET Arseny Krasnov
2021-03-15 11:02 ` Stefano Garzarella
2021-03-07 18:02 ` [RFC PATCH v6 12/22] virtio/vsock: fetch length for SEQPACKET record Arseny Krasnov
2021-03-12 15:20 ` Stefano Garzarella
2021-03-15 7:49 ` Arseny Krasnov
2021-03-07 18:02 ` [RFC PATCH v6 13/22] virtio/vsock: add SEQPACKET receive logic Arseny Krasnov
2021-03-15 11:15 ` Stefano Garzarella
2021-03-07 18:03 ` [RFC PATCH v6 14/22] virtio/vsock: rest of SOCK_SEQPACKET support Arseny Krasnov
2021-03-15 11:25 ` Stefano Garzarella
2021-03-07 18:03 ` [RFC PATCH v6 15/22] virtio/vsock: SEQPACKET support feature bit Arseny Krasnov
2021-03-07 18:03 ` [RFC PATCH v6 16/22] vhost/vsock: SEQPACKET feature bit support Arseny Krasnov
2021-03-15 11:28 ` Stefano Garzarella
2021-03-07 18:04 ` [RFC PATCH v6 17/22] virtio/vsock: " Arseny Krasnov
2021-03-15 11:29 ` Stefano Garzarella
2021-03-07 18:04 ` [RFC PATCH v6 18/22] virtio/vsock: setup SEQPACKET ops for transport Arseny Krasnov
2021-03-07 18:04 ` [RFC PATCH v6 19/22] vhost/vsock: " Arseny Krasnov
2021-03-07 18:04 ` [RFC PATCH v6 20/22] vsock/loopback: " Arseny Krasnov
2021-03-07 18:05 ` [RFC PATCH v6 21/22] vsock_test: add SOCK_SEQPACKET tests Arseny Krasnov
2021-03-07 18:05 ` [RFC PATCH v6 22/22] virtio/vsock: update trace event for SEQPACKET Arseny Krasnov
2021-03-10 10:06 ` [RFC PATCH v6 00/22] virtio/vsock: introduce SOCK_SEQPACKET support Stefano Garzarella
2021-03-10 10:13 ` Arseny Krasnov
2021-03-15 11:40 ` Stefano Garzarella
2021-03-15 15:22 ` Arseny Krasnov
2021-03-16 3:37 ` Arseny Krasnov
2021-03-16 8:08 ` Stefano Garzarella
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