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>,
Colin Ian King <colin.king@canonical.com>,
Norbert Slusarek <nslusarek@gmx.net>,
Andra Paraschiv <andraprs@amazon.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: [PATCH net-next v5 3/6] vhost/vsock: support MSG_EOR bit processing
Date: Fri, 3 Sep 2021 15:32:35 +0300 [thread overview]
Message-ID: <20210903123238.3273526-1-arseny.krasnov@kaspersky.com> (raw)
In-Reply-To: <20210903123016.3272800-1-arseny.krasnov@kaspersky.com>
'MSG_EOR' handling has similar logic as 'MSG_EOM' - if bit present
in packet's header, reset it to 0. Then restore it back if packet
processing wasn't completed. Instead of bool variable for each
flag, bit mask variable was added: it has logical OR of 'MSG_EOR'
and 'MSG_EOM' if needed, to restore flags, this variable is ORed
with flags field of packet.
Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
---
drivers/vhost/vsock.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index feaf650affbe..938aefbc75ec 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -114,7 +114,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
size_t nbytes;
size_t iov_len, payload_len;
int head;
- bool restore_flag = false;
+ u32 flags_to_restore = 0;
spin_lock_bh(&vsock->send_pkt_list_lock);
if (list_empty(&vsock->send_pkt_list)) {
@@ -179,15 +179,20 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
* created dynamically and are initialized with header
* of current packet(except length). But in case of
* SOCK_SEQPACKET, we also must clear message delimeter
- * bit(VIRTIO_VSOCK_SEQ_EOM). Otherwise, instead of one
- * packet with delimeter(which marks end of message),
- * there will be sequence of packets with delimeter
- * bit set. After initialized header will be copied to
- * rx buffer, this bit will be restored.
+ * bit (VIRTIO_VSOCK_SEQ_EOM) and MSG_EOR bit
+ * (VIRTIO_VSOCK_SEQ_EOR) if set. Otherwise,
+ * there will be sequence of packets with these
+ * bits set. After initialized header will be copied to
+ * rx buffer, these required bits will be restored.
*/
if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM) {
pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
- restore_flag = true;
+ flags_to_restore |= VIRTIO_VSOCK_SEQ_EOM;
+
+ if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR) {
+ pkt->hdr.flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
+ flags_to_restore |= VIRTIO_VSOCK_SEQ_EOR;
+ }
}
}
@@ -224,8 +229,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
* to send it with the next available buffer.
*/
if (pkt->off < pkt->len) {
- if (restore_flag)
- pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
+ pkt->hdr.flags |= cpu_to_le32(flags_to_restore);
/* We are queueing the same virtio_vsock_pkt to handle
* the remaining bytes, and we want to deliver it
--
2.25.1
next prev parent reply other threads:[~2021-09-03 12:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 12:30 [PATCH net-next v5 0/6] virtio/vsock: introduce MSG_EOR flag for SEQPACKET Arseny Krasnov
2021-09-03 12:31 ` [PATCH net-next v5 1/6] virtio/vsock: rename 'EOR' to 'EOM' bit Arseny Krasnov
2021-09-03 12:32 ` [PATCH net-next v5 2/6] virtio/vsock: add 'VIRTIO_VSOCK_SEQ_EOR' bit Arseny Krasnov
2021-09-03 12:32 ` Arseny Krasnov [this message]
2021-09-03 12:51 ` [PATCH net-next v5 3/6] vhost/vsock: support MSG_EOR bit processing Stefano Garzarella
2021-09-03 12:32 ` [PATCH net-next v5 4/6] virtio/vsock: " Arseny Krasnov
2021-09-03 12:33 ` [PATCH net-next v5 5/6] af_vsock: rename variables in receive loop Arseny Krasnov
2021-09-03 12:33 ` [PATCH net-next v5 6/6] vsock_test: update message bounds test for MSG_EOR Arseny Krasnov
2021-09-03 22:17 ` [PATCH net-next v5 0/6] virtio/vsock: introduce MSG_EOR flag for SEQPACKET Jakub Kicinski
2021-09-05 15:55 ` Michael S. Tsirkin
2021-09-05 16:02 ` Arseny Krasnov
2021-09-05 16:19 ` Michael S. Tsirkin
2021-09-05 16:21 ` Arseny Krasnov
2021-09-05 20:18 ` Michael S. Tsirkin
2021-09-06 7:33 ` Stefano Garzarella
2021-09-06 8:03 ` Michael S. Tsirkin
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