2021-04-13 15:14:43

by Arseny Krasnov

Subject: [RFC PATCH v8 13/19] virtio/vsock: rest of SOCK_SEQPACKET support

This adds rest of logic for SEQPACKET:
1) Send SHUTDOWN on socket close for SEQPACKET type.
2) Set SEQPACKET packet type during send.
3) 'seqpacket_allow' flag to virtio transport.
4) Set 'VIRTIO_VSOCK_SEQ_EOR' bit in flags for last
packet of message.

Signed-off-by: Arseny Krasnov <[email protected]>
---
v7 -> v8:
- MSG_EOR handling is removed, i didn't found exact description about
how it works in POSIX.
- SEQ_BEGIN, SEQ_END, etc. now removed.

include/linux/virtio_vsock.h | 6 ++++++
net/vmw_vsock/virtio_transport_common.c | 16 ++++++++++++++--
2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index 02acf6e9ae04..f00a01bfdd7e 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -68,6 +68,8 @@ struct virtio_transport {

/* Takes ownership of the packet */
int (*send_pkt)(struct virtio_vsock_pkt *pkt);
+
+ bool seqpacket_allow;
};

ssize_t
@@ -80,6 +82,10 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
struct msghdr *msg,
size_t len, int flags);

+int
+virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
+ struct msghdr *msg,
+ size_t len);
ssize_t
virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
struct msghdr *msg,
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 572869fef832..4c5b63601308 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -74,6 +74,9 @@ virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
err = memcpy_from_msg(pkt->buf, info->msg, len);
if (err)
goto out;
+
+ if (info->msg->msg_iter.count == 0)
+ pkt->hdr.flags |= VIRTIO_VSOCK_SEQ_EOR;
}

trace_virtio_transport_alloc_pkt(src_cid, src_port,
@@ -187,7 +190,7 @@ static int virtio_transport_send_pkt_info(struct vsock_sock *vsk,
struct virtio_vsock_pkt *pkt;
u32 pkt_len = info->pkt_len;

- info->type = VIRTIO_VSOCK_TYPE_STREAM;
+ info->type = virtio_transport_get_type(sk_vsock(vsk));

t_ops = virtio_transport_get_ops(vsk);
if (unlikely(!t_ops))
@@ -486,6 +489,15 @@ virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
}
EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_dequeue);

+int
+virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
+ struct msghdr *msg,
+ size_t len)
+{
+ return virtio_transport_stream_enqueue(vsk, msg, len);
+}
+EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_enqueue);
+
int
virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
struct msghdr *msg,
@@ -905,7 +917,7 @@ void virtio_transport_release(struct vsock_sock *vsk)
struct sock *sk = &vsk->sk;
bool remove_sock = true;

- if (sk->sk_type == SOCK_STREAM)
+ if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET)
remove_sock = virtio_transport_close(vsk);

list_for_each_entry_safe(pkt, tmp, &vvs->rx_queue, list) {
--
2.25.1

2021-04-21 09:16:10

by Stefano Garzarella

Subject: Re: [RFC PATCH v8 13/19] virtio/vsock: rest of SOCK_SEQPACKET support

On Tue, Apr 13, 2021 at 03:45:25PM +0300, Arseny Krasnov wrote:
>This adds rest of logic for SEQPACKET:
>1) Send SHUTDOWN on socket close for SEQPACKET type.
>2) Set SEQPACKET packet type during send.
>3) 'seqpacket_allow' flag to virtio transport.
>4) Set 'VIRTIO_VSOCK_SEQ_EOR' bit in flags for last
> packet of message.
>
>Signed-off-by: Arseny Krasnov <[email protected]>
>---
>v7 -> v8:
> - MSG_EOR handling is removed, i didn't found exact description about
> how it works in POSIX.
> - SEQ_BEGIN, SEQ_END, etc. now removed.
>
> include/linux/virtio_vsock.h | 6 ++++++
> net/vmw_vsock/virtio_transport_common.c | 16 ++++++++++++++--
> 2 files changed, 20 insertions(+), 2 deletions(-)
>
>diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
>index 02acf6e9ae04..f00a01bfdd7e 100644
>--- a/include/linux/virtio_vsock.h
>+++ b/include/linux/virtio_vsock.h
>@@ -68,6 +68,8 @@ struct virtio_transport {
>
> /* Takes ownership of the packet */
> int (*send_pkt)(struct virtio_vsock_pkt *pkt);
>+
>+ bool seqpacket_allow;
> };
>
> ssize_t
>@@ -80,6 +82,10 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
> struct msghdr *msg,
> size_t len, int flags);
>
>+int
>+virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
>+ struct msghdr *msg,
>+ size_t len);
> ssize_t
> virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
> struct msghdr *msg,
>diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
>index 572869fef832..4c5b63601308 100644
>--- a/net/vmw_vsock/virtio_transport_common.c
>+++ b/net/vmw_vsock/virtio_transport_common.c
>@@ -74,6 +74,9 @@ virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
> err = memcpy_from_msg(pkt->buf, info->msg, len);
> if (err)
> goto out;
>+
>+ if (info->msg->msg_iter.count == 0)
>+ pkt->hdr.flags |= VIRTIO_VSOCK_SEQ_EOR;

We should set the flag in info->flags and assign it using cpu_to_le32()
or just the following:
pkt->hdr.flags = cpu_to_le32(info->flags |
VIRTIO_VSOCK_SEQ_EOR);


> }
>
> trace_virtio_transport_alloc_pkt(src_cid, src_port,
>@@ -187,7 +190,7 @@ static int virtio_transport_send_pkt_info(struct vsock_sock *vsk,
> struct virtio_vsock_pkt *pkt;
> u32 pkt_len = info->pkt_len;
>
>- info->type = VIRTIO_VSOCK_TYPE_STREAM;
>+ info->type = virtio_transport_get_type(sk_vsock(vsk));
>
> t_ops = virtio_transport_get_ops(vsk);
> if (unlikely(!t_ops))
>@@ -486,6 +489,15 @@ virtio_transport_seqpacket_dequeue(struct
>vsock_sock *vsk,
> }
> EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_dequeue);
>
>+int
>+virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
>+ struct msghdr *msg,
>+ size_t len)
>+{
>+ return virtio_transport_stream_enqueue(vsk, msg, len);
>+}
>+EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_enqueue);
>+
> int
> virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
> struct msghdr *msg,
>@@ -905,7 +917,7 @@ void virtio_transport_release(struct vsock_sock *vsk)
> struct sock *sk = &vsk->sk;
> bool remove_sock = true;
>
>- if (sk->sk_type == SOCK_STREAM)
>+ if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET)
> remove_sock = virtio_transport_close(vsk);
>
> list_for_each_entry_safe(pkt, tmp, &vvs->rx_queue, list) {
>--
>2.25.1
>

2021-04-21 20:39:32

by Arseny Krasnov

Subject: Re: [RFC PATCH v8 13/19] virtio/vsock: rest of SOCK_SEQPACKET support

On 21.04.2021 12:12, Stefano Garzarella wrote:
> On Tue, Apr 13, 2021 at 03:45:25PM +0300, Arseny Krasnov wrote:
>> This adds rest of logic for SEQPACKET:
>> 1) Send SHUTDOWN on socket close for SEQPACKET type.
>> 2) Set SEQPACKET packet type during send.
>> 3) 'seqpacket_allow' flag to virtio transport.
>> 4) Set 'VIRTIO_VSOCK_SEQ_EOR' bit in flags for last
>> packet of message.
>>
>> Signed-off-by: Arseny Krasnov <[email protected]>
>> ---
>> v7 -> v8:
>> - MSG_EOR handling is removed, i didn't found exact description about
>> how it works in POSIX.
>> - SEQ_BEGIN, SEQ_END, etc. now removed.
>>
>> include/linux/virtio_vsock.h | 6 ++++++
>> net/vmw_vsock/virtio_transport_common.c | 16 ++++++++++++++--
>> 2 files changed, 20 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
>> index 02acf6e9ae04..f00a01bfdd7e 100644
>> --- a/include/linux/virtio_vsock.h
>> +++ b/include/linux/virtio_vsock.h
>> @@ -68,6 +68,8 @@ struct virtio_transport {
>>
>> /* Takes ownership of the packet */
>> int (*send_pkt)(struct virtio_vsock_pkt *pkt);
>> +
>> + bool seqpacket_allow;
>> };
>>
>> ssize_t
>> @@ -80,6 +82,10 @@ virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
>> struct msghdr *msg,
>> size_t len, int flags);
>>
>> +int
>> +virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
>> + struct msghdr *msg,
>> + size_t len);
>> ssize_t
>> virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
>> struct msghdr *msg,
>> diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
>> index 572869fef832..4c5b63601308 100644
>> --- a/net/vmw_vsock/virtio_transport_common.c
>> +++ b/net/vmw_vsock/virtio_transport_common.c
>> @@ -74,6 +74,9 @@ virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
>> err = memcpy_from_msg(pkt->buf, info->msg, len);
>> if (err)
>> goto out;
>> +
>> + if (info->msg->msg_iter.count == 0)
>> + pkt->hdr.flags |= VIRTIO_VSOCK_SEQ_EOR;
> We should set the flag in info->flags and assign it using cpu_to_le32()
> or just the following:
> pkt->hdr.flags = cpu_to_le32(info->flags |
> VIRTIO_VSOCK_SEQ_EOR);
Ack
>
>
>> }
>>
>> trace_virtio_transport_alloc_pkt(src_cid, src_port,
>> @@ -187,7 +190,7 @@ static int virtio_transport_send_pkt_info(struct vsock_sock *vsk,
>> struct virtio_vsock_pkt *pkt;
>> u32 pkt_len = info->pkt_len;
>>
>> - info->type = VIRTIO_VSOCK_TYPE_STREAM;
>> + info->type = virtio_transport_get_type(sk_vsock(vsk));
>>
>> t_ops = virtio_transport_get_ops(vsk);
>> if (unlikely(!t_ops))
>> @@ -486,6 +489,15 @@ virtio_transport_seqpacket_dequeue(struct
>> vsock_sock *vsk,
>> }
>> EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_dequeue);
>>
>> +int
>> +virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
>> + struct msghdr *msg,
>> + size_t len)
>> +{
>> + return virtio_transport_stream_enqueue(vsk, msg, len);
>> +}
>> +EXPORT_SYMBOL_GPL(virtio_transport_seqpacket_enqueue);
>> +
>> int
>> virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
>> struct msghdr *msg,
>> @@ -905,7 +917,7 @@ void virtio_transport_release(struct vsock_sock *vsk)
>> struct sock *sk = &vsk->sk;
>> bool remove_sock = true;
>>
>> - if (sk->sk_type == SOCK_STREAM)
>> + if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET)
>> remove_sock = virtio_transport_close(vsk);
>>
>> list_for_each_entry_safe(pkt, tmp, &vvs->rx_queue, list) {
>> --
>> 2.25.1
>>
>