Re: [PATCH net-next 07/14] vsock: handle buffer_size sockopts in the core

Stefano Garzarella
2019-10-31T08:50:33Z

On Wed, Oct 30, 2019 at 03:08:15PM +0000, Jorgen Hansen wrote:
> > From: Stefano Garzarella [mailto:sgarzare@redhat.com]
> > Sent: Wednesday, October 23, 2019 11:56 AM
> > Subject: [PATCH net-next 07/14] vsock: handle buffer_size sockopts in the
> > core
> >
> > virtio_transport and vmci_transport handle the buffer_size sockopts in a
> > very similar way.
> >
> > In order to support multiple transports, this patch moves this handling in the
> > core to allow the user to change the options also if the socket is not yet
> > assigned to any transport.
> >
> > This patch also adds the '.notify_buffer_size' callback in the 'struct
> > virtio_transport' in order to inform the transport, when the buffer_size is
> > changed by the user. It is also useful to limit the 'buffer_size' requested (e.g.
> > virtio transports).
> >
> > Acked-by: Dexuan Cui <decui@microsoft.com>
> > Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
> > ---
> > RFC -> v1:
> > - changed .notify_buffer_size return to void (Stefan)
> > - documented that .notify_buffer_size is called with sk_lock held (Stefan)
> > ---
> > drivers/vhost/vsock.c | 7 +-
> > include/linux/virtio_vsock.h | 15 +----
> > include/net/af_vsock.h | 15 ++---
> > net/vmw_vsock/af_vsock.c | 43 ++++++++++---
> > net/vmw_vsock/hyperv_transport.c | 36 -----------
> > net/vmw_vsock/virtio_transport.c | 8 +--
> > net/vmw_vsock/virtio_transport_common.c | 79 ++++-------------------
> > net/vmw_vsock/vmci_transport.c | 86 +++----------------------
> > net/vmw_vsock/vmci_transport.h | 3 -
> > 9 files changed, 65 insertions(+), 227 deletions(-)
> >
> > diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index
> > 92ab3852c954..6d7e4f022748 100644
> > --- a/drivers/vhost/vsock.c
> > +++ b/drivers/vhost/vsock.c
> > @@ -418,13 +418,8 @@ static struct virtio_transport vhost_transport = {
> > .notify_send_pre_block =
> > virtio_transport_notify_send_pre_block,
> > .notify_send_pre_enqueue =
> > virtio_transport_notify_send_pre_enqueue,
> > .notify_send_post_enqueue =
> > virtio_transport_notify_send_post_enqueue,
> > + .notify_buffer_size = virtio_transport_notify_buffer_size,
> >
> > - .set_buffer_size = virtio_transport_set_buffer_size,
> > - .set_min_buffer_size =
> > virtio_transport_set_min_buffer_size,
> > - .set_max_buffer_size =
> > virtio_transport_set_max_buffer_size,
> > - .get_buffer_size = virtio_transport_get_buffer_size,
> > - .get_min_buffer_size =
> > virtio_transport_get_min_buffer_size,
> > - .get_max_buffer_size =
> > virtio_transport_get_max_buffer_size,
> > },
> >
> > .send_pkt = vhost_transport_send_pkt,
> > diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h index
> > 96d8132acbd7..b79befd2a5a4 100644
> > --- a/include/linux/virtio_vsock.h
> > +++ b/include/linux/virtio_vsock.h
> > @@ -7,9 +7,6 @@
> > #include <net/sock.h>
> > #include <net/af_vsock.h>
> >
> > -#define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
> > -#define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
> > -#define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
> > #define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
> > #define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
> > #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
> > @@ -25,11 +22,6 @@ enum {
> > struct virtio_vsock_sock {
> > struct vsock_sock *vsk;
> >
> > - /* Protected by lock_sock(sk_vsock(trans->vsk)) */
> > - u32 buf_size;
> > - u32 buf_size_min;
> > - u32 buf_size_max;
> > -
> > spinlock_t tx_lock;
> > spinlock_t rx_lock;
> >
> > @@ -93,12 +85,6 @@ s64 virtio_transport_stream_has_space(struct
> > vsock_sock *vsk);
> >
> > int virtio_transport_do_socket_init(struct vsock_sock *vsk,
> > struct vsock_sock *psk);
> > -u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
> > -u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
> > -u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk); -void
> > virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val); -void
> > virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val); -void
> > virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val); int
> > virtio_transport_notify_poll_in(struct vsock_sock *vsk,
> > size_t target,
> > @@ -125,6 +111,7 @@ int
> > virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
> > struct vsock_transport_send_notify_data *data); int
> > virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
> > ssize_t written, struct vsock_transport_send_notify_data *data);
> > +void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64
> > +*val);
> >
> > u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk); bool
> > virtio_transport_stream_is_active(struct vsock_sock *vsk); diff --git
> > a/include/net/af_vsock.h b/include/net/af_vsock.h index
> > 2ca67d048de4..4b5d16840fd4 100644
> > --- a/include/net/af_vsock.h
> > +++ b/include/net/af_vsock.h
> > @@ -65,6 +65,11 @@ struct vsock_sock {
> > bool sent_request;
> > bool ignore_connecting_rst;
> >
> > + /* Protected by lock_sock(sk) */
> > + u64 buffer_size;
> > + u64 buffer_min_size;
> > + u64 buffer_max_size;
> > +
> > /* Private to transport. */
> > void *trans;
> > };
> > @@ -140,18 +145,12 @@ struct vsock_transport {
> > struct vsock_transport_send_notify_data *);
> > int (*notify_send_post_enqueue)(struct vsock_sock *, ssize_t,
> > struct vsock_transport_send_notify_data *);
> > + /* sk_lock held by the caller */
> > + void (*notify_buffer_size)(struct vsock_sock *, u64 *);
> >
> > /* Shutdown. */
> > int (*shutdown)(struct vsock_sock *, int);
> >
> > - /* Buffer sizes. */
> > - void (*set_buffer_size)(struct vsock_sock *, u64);
> > - void (*set_min_buffer_size)(struct vsock_sock *, u64);
> > - void (*set_max_buffer_size)(struct vsock_sock *, u64);
> > - u64 (*get_buffer_size)(struct vsock_sock *);
> > - u64 (*get_min_buffer_size)(struct vsock_sock *);
> > - u64 (*get_max_buffer_size)(struct vsock_sock *);
> > -
> > /* Addressing. */
> > u32 (*get_local_cid)(void);
> > };
> > diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index
> > eaea159006c8..90ac46ea12ef 100644
> > --- a/net/vmw_vsock/af_vsock.c
> > +++ b/net/vmw_vsock/af_vsock.c
> > @@ -126,6 +126,10 @@ static struct proto vsock_proto = {
> > */
> > #define VSOCK_DEFAULT_CONNECT_TIMEOUT (2 * HZ)
> >
> > +#define VSOCK_DEFAULT_BUFFER_SIZE (1024 * 256)
> > +#define VSOCK_DEFAULT_BUFFER_MAX_SIZE (1024 * 256) #define
> > +VSOCK_DEFAULT_BUFFER_MIN_SIZE 128
> > +
> > static const struct vsock_transport *transport_single; static
> > DEFINE_MUTEX(vsock_register_mutex);
> >
> > @@ -613,10 +617,16 @@ struct sock *__vsock_create(struct net *net,
> > vsk->trusted = psk->trusted;
> > vsk->owner = get_cred(psk->owner);
> > vsk->connect_timeout = psk->connect_timeout;
> > + vsk->buffer_size = psk->buffer_size;
> > + vsk->buffer_min_size = psk->buffer_min_size;
> > + vsk->buffer_max_size = psk->buffer_max_size;
> > } else {
> > vsk->trusted = capable(CAP_NET_ADMIN);
> > vsk->owner = get_current_cred();
> > vsk->connect_timeout =
> > VSOCK_DEFAULT_CONNECT_TIMEOUT;
> > + vsk->buffer_size = VSOCK_DEFAULT_BUFFER_SIZE;
> > + vsk->buffer_min_size =
> > VSOCK_DEFAULT_BUFFER_MIN_SIZE;
> > + vsk->buffer_max_size =
> > VSOCK_DEFAULT_BUFFER_MAX_SIZE;
> > }
> >
> > if (vsk->transport->init(vsk, psk) < 0) { @@ -1368,6 +1378,23 @@
> > static int vsock_listen(struct socket *sock, int backlog)
> > return err;
> > }
> >
> > +static void vsock_update_buffer_size(struct vsock_sock *vsk,
> > + const struct vsock_transport *transport,
> > + u64 val)
> > +{
> > + if (val > vsk->buffer_max_size)
> > + val = vsk->buffer_max_size;
> > +
> > + if (val < vsk->buffer_min_size)
> > + val = vsk->buffer_min_size;
> > +
> > + if (val != vsk->buffer_size &&
> > + transport && transport->notify_buffer_size)
> > + transport->notify_buffer_size(vsk, &val);
> > +
> > + vsk->buffer_size = val;
> > +}
> > +
> > static int vsock_stream_setsockopt(struct socket *sock,
> > int level,
> > int optname,
> > @@ -1405,17 +1432,19 @@ static int vsock_stream_setsockopt(struct socket
> > *sock,
> > switch (optname) {
> > case SO_VM_SOCKETS_BUFFER_SIZE:
> > COPY_IN(val);
> > - transport->set_buffer_size(vsk, val);
> > + vsock_update_buffer_size(vsk, transport, val);
> > break;
> >
> > case SO_VM_SOCKETS_BUFFER_MAX_SIZE:
> > COPY_IN(val);
> > - transport->set_max_buffer_size(vsk, val);
> > + vsk->buffer_max_size = val;
> > + vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
> > break;
> >
> > case SO_VM_SOCKETS_BUFFER_MIN_SIZE:
> > COPY_IN(val);
> > - transport->set_min_buffer_size(vsk, val);
> > + vsk->buffer_min_size = val;
> > + vsock_update_buffer_size(vsk, transport, vsk->buffer_size);
> > break;
> >
> > case SO_VM_SOCKETS_CONNECT_TIMEOUT: {
> > @@ -1456,7 +1485,6 @@ static int vsock_stream_getsockopt(struct socket
> > *sock,
> > int len;
> > struct sock *sk;
> > struct vsock_sock *vsk;
> > - const struct vsock_transport *transport;
> > u64 val;
> >
> > if (level != AF_VSOCK)
> > @@ -1480,21 +1508,20 @@ static int vsock_stream_getsockopt(struct socket
> > *sock,
> > err = 0;
> > sk = sock->sk;
> > vsk = vsock_sk(sk);
> > - transport = vsk->transport;
> >
> > switch (optname) {
> > case SO_VM_SOCKETS_BUFFER_SIZE:
> > - val = transport->get_buffer_size(vsk);
> > + val = vsk->buffer_size;
> > COPY_OUT(val);
> > break;
> >
> > case SO_VM_SOCKETS_BUFFER_MAX_SIZE:
> > - val = transport->get_max_buffer_size(vsk);
> > + val = vsk->buffer_max_size;
> > COPY_OUT(val);
> > break;
> >
> > case SO_VM_SOCKETS_BUFFER_MIN_SIZE:
> > - val = transport->get_min_buffer_size(vsk);
> > + val = vsk->buffer_min_size;
> > COPY_OUT(val);
> > break;
> >
> > diff --git a/net/vmw_vsock/hyperv_transport.c
> > b/net/vmw_vsock/hyperv_transport.c
> > index bef8772116ec..d62297a62ca6 100644
> > --- a/net/vmw_vsock/hyperv_transport.c
> > +++ b/net/vmw_vsock/hyperv_transport.c
> > @@ -845,36 +845,6 @@ int hvs_notify_send_post_enqueue(struct
> > vsock_sock *vsk, ssize_t written,
> > return 0;
> > }
> >
> > -static void hvs_set_buffer_size(struct vsock_sock *vsk, u64 val) -{
> > - /* Ignored. */
> > -}
> > -
> > -static void hvs_set_min_buffer_size(struct vsock_sock *vsk, u64 val) -{
> > - /* Ignored. */
> > -}
> > -
> > -static void hvs_set_max_buffer_size(struct vsock_sock *vsk, u64 val) -{
> > - /* Ignored. */
> > -}
> > -
> > -static u64 hvs_get_buffer_size(struct vsock_sock *vsk) -{
> > - return -ENOPROTOOPT;
> > -}
> > -
> > -static u64 hvs_get_min_buffer_size(struct vsock_sock *vsk) -{
> > - return -ENOPROTOOPT;
> > -}
> > -
> > -static u64 hvs_get_max_buffer_size(struct vsock_sock *vsk) -{
> > - return -ENOPROTOOPT;
> > -}
> > -
> > static struct vsock_transport hvs_transport = {
> > .get_local_cid = hvs_get_local_cid,
> >
> > @@ -908,12 +878,6 @@ static struct vsock_transport hvs_transport = {
> > .notify_send_pre_enqueue = hvs_notify_send_pre_enqueue,
> > .notify_send_post_enqueue = hvs_notify_send_post_enqueue,
> >
> > - .set_buffer_size = hvs_set_buffer_size,
> > - .set_min_buffer_size = hvs_set_min_buffer_size,
> > - .set_max_buffer_size = hvs_set_max_buffer_size,
> > - .get_buffer_size = hvs_get_buffer_size,
> > - .get_min_buffer_size = hvs_get_min_buffer_size,
> > - .get_max_buffer_size = hvs_get_max_buffer_size,
> > };
> >
> > static int hvs_probe(struct hv_device *hdev, diff --git
> > a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
> > index 3756f0857946..fb1fc7760e8c 100644
> > --- a/net/vmw_vsock/virtio_transport.c
> > +++ b/net/vmw_vsock/virtio_transport.c
> > @@ -494,13 +494,7 @@ static struct virtio_transport virtio_transport = {
> > .notify_send_pre_block =
> > virtio_transport_notify_send_pre_block,
> > .notify_send_pre_enqueue =
> > virtio_transport_notify_send_pre_enqueue,
> > .notify_send_post_enqueue =
> > virtio_transport_notify_send_post_enqueue,
> > -
> > - .set_buffer_size = virtio_transport_set_buffer_size,
> > - .set_min_buffer_size =
> > virtio_transport_set_min_buffer_size,
> > - .set_max_buffer_size =
> > virtio_transport_set_max_buffer_size,
> > - .get_buffer_size = virtio_transport_get_buffer_size,
> > - .get_min_buffer_size =
> > virtio_transport_get_min_buffer_size,
> > - .get_max_buffer_size =
> > virtio_transport_get_max_buffer_size,
> > + .notify_buffer_size = virtio_transport_notify_buffer_size,
> > },
> >
> > .send_pkt = virtio_transport_send_pkt, diff --git
> > a/net/vmw_vsock/virtio_transport_common.c
> > b/net/vmw_vsock/virtio_transport_common.c
> > index 37a1c7e7c7fe..b2a310dfa158 100644
> > --- a/net/vmw_vsock/virtio_transport_common.c
> > +++ b/net/vmw_vsock/virtio_transport_common.c
> > @@ -456,17 +456,13 @@ int virtio_transport_do_socket_init(struct
> > vsock_sock *vsk,
> > if (psk) {
> > struct virtio_vsock_sock *ptrans = psk->trans;
> >
> > - vvs->buf_size = ptrans->buf_size;
> > - vvs->buf_size_min = ptrans->buf_size_min;
> > - vvs->buf_size_max = ptrans->buf_size_max;
> > vvs->peer_buf_alloc = ptrans->peer_buf_alloc;
> > - } else {
> > - vvs->buf_size = VIRTIO_VSOCK_DEFAULT_BUF_SIZE;
> > - vvs->buf_size_min =
> > VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE;
> > - vvs->buf_size_max =
> > VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE;
> > }
> >
> > - vvs->buf_alloc = vvs->buf_size;
> > + if (vsk->buffer_size > VIRTIO_VSOCK_MAX_BUF_SIZE)
> > + vsk->buffer_size = VIRTIO_VSOCK_MAX_BUF_SIZE;
> > +
> > + vvs->buf_alloc = vsk->buffer_size;
> >
> > spin_lock_init(&vvs->rx_lock);
> > spin_lock_init(&vvs->tx_lock);
> > @@ -476,71 +472,20 @@ int virtio_transport_do_socket_init(struct
> > vsock_sock *vsk, } EXPORT_SYMBOL_GPL(virtio_transport_do_socket_init);
> >
> > -u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk) -{
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > -
> > - return vvs->buf_size;
> > -}
> > -EXPORT_SYMBOL_GPL(virtio_transport_get_buffer_size);
> > -
> > -u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk)
> > +/* sk_lock held by the caller */
> > +void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64
> > +*val)
> > {
> > struct virtio_vsock_sock *vvs = vsk->trans;
> >
> > - return vvs->buf_size_min;
> > -}
> > -EXPORT_SYMBOL_GPL(virtio_transport_get_min_buffer_size);
> > -
> > -u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk) -{
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > -
> > - return vvs->buf_size_max;
> > -}
> > -EXPORT_SYMBOL_GPL(virtio_transport_get_max_buffer_size);
> > -
> > -void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val) -{
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > + if (*val > VIRTIO_VSOCK_MAX_BUF_SIZE)
> > + *val = VIRTIO_VSOCK_MAX_BUF_SIZE;
> >
> > - if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
> > - val = VIRTIO_VSOCK_MAX_BUF_SIZE;
> > - if (val < vvs->buf_size_min)
> > - vvs->buf_size_min = val;
> > - if (val > vvs->buf_size_max)
> > - vvs->buf_size_max = val;
> > - vvs->buf_size = val;
> > - vvs->buf_alloc = val;
> > + vvs->buf_alloc = *val;
> >
> > virtio_transport_send_credit_update(vsk,
> > VIRTIO_VSOCK_TYPE_STREAM,
> > NULL);
> > }
> > -EXPORT_SYMBOL_GPL(virtio_transport_set_buffer_size);
> > -
> > -void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val)
> > -{
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > -
> > - if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
> > - val = VIRTIO_VSOCK_MAX_BUF_SIZE;
> > - if (val > vvs->buf_size)
> > - vvs->buf_size = val;
> > - vvs->buf_size_min = val;
> > -}
> > -EXPORT_SYMBOL_GPL(virtio_transport_set_min_buffer_size);
> > -
> > -void virtio_transport_set_max_buffer_size(struct vsock_sock *vsk, u64 val)
> > -{
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > -
> > - if (val > VIRTIO_VSOCK_MAX_BUF_SIZE)
> > - val = VIRTIO_VSOCK_MAX_BUF_SIZE;
> > - if (val < vvs->buf_size)
> > - vvs->buf_size = val;
> > - vvs->buf_size_max = val;
> > -}
> > -EXPORT_SYMBOL_GPL(virtio_transport_set_max_buffer_size);
> > +EXPORT_SYMBOL_GPL(virtio_transport_notify_buffer_size);
> >
> > int
> > virtio_transport_notify_poll_in(struct vsock_sock *vsk, @@ -632,9 +577,7
> > @@ EXPORT_SYMBOL_GPL(virtio_transport_notify_send_post_enqueue);
> >
> > u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk) {
> > - struct virtio_vsock_sock *vvs = vsk->trans;
> > -
> > - return vvs->buf_size;
> > + return vsk->buffer_size;
> > }
> > EXPORT_SYMBOL_GPL(virtio_transport_stream_rcvhiwat);
>
> While the VMCI transport uses a transport local consumer_size for stream_rcvhiwat,
> that consumer_size is always the same as buffer_size (a vmci queue pair allows the
> producer and consumer queues to be of different sizes, but vsock doesn't use that).
> So we could move the stream_rcvhiwat code to the common code as well, and just
> use buffer_size, if that simplifies things.
>

Thanks to let me know. It could be another step to clean up the
transports. I'm only worried about hyperv_transport, because it returns
HVS_MTU_SIZE + 1.

@Dexuan Do you have any advice?

> > diff --git a/net/vmw_vsock/vmci_transport.c
> > b/net/vmw_vsock/vmci_transport.c index f8e3131ac480..8290d37b6587
> > 100644
> > --- a/net/vmw_vsock/vmci_transport.c
> > +++ b/net/vmw_vsock/vmci_transport.c
> > @@ -74,10 +74,6 @@ static u32 vmci_transport_qp_resumed_sub_id =
> > VMCI_INVALID_ID;
> >
> > static int PROTOCOL_OVERRIDE = -1;
> >
> > -#define VMCI_TRANSPORT_DEFAULT_QP_SIZE_MIN 128
> > -#define VMCI_TRANSPORT_DEFAULT_QP_SIZE 262144
> > -#define VMCI_TRANSPORT_DEFAULT_QP_SIZE_MAX 262144
> > -
> > /* Helper function to convert from a VMCI error code to a VSock error code.
> > */
> >
> > static s32 vmci_transport_error_to_vsock_error(s32 vmci_error) @@ -
> > 1025,11 +1021,11 @@ static int vmci_transport_recv_listen(struct sock *sk,
> > /* If the proposed size fits within our min/max, accept it. Otherwise
> > * propose our own size.
> > */
> > - if (pkt->u.size >= vmci_trans(vpending)->queue_pair_min_size &&
> > - pkt->u.size <= vmci_trans(vpending)->queue_pair_max_size) {
> > + if (pkt->u.size >= vpending->buffer_min_size &&
> > + pkt->u.size <= vpending->buffer_max_size) {
> > qp_size = pkt->u.size;
> > } else {
> > - qp_size = vmci_trans(vpending)->queue_pair_size;
> > + qp_size = vpending->buffer_size;
> > }
> >
> > /* Figure out if we are using old or new requests based on the @@ -
> > 1098,7 +1094,7 @@ static int vmci_transport_recv_listen(struct sock *sk,
> > pending->sk_state = TCP_SYN_SENT;
> > vmci_trans(vpending)->produce_size =
> > vmci_trans(vpending)->consume_size = qp_size;
> > - vmci_trans(vpending)->queue_pair_size = qp_size;
> > + vpending->buffer_size = qp_size;
> >
> > vmci_trans(vpending)->notify_ops->process_request(pending);
> >
> > @@ -1392,8 +1388,8 @@ static int
> > vmci_transport_recv_connecting_client_negotiate(
> > vsk->ignore_connecting_rst = false;
> >
> > /* Verify that we're OK with the proposed queue pair size */
> > - if (pkt->u.size < vmci_trans(vsk)->queue_pair_min_size ||
> > - pkt->u.size > vmci_trans(vsk)->queue_pair_max_size) {
> > + if (pkt->u.size < vsk->buffer_min_size ||
> > + pkt->u.size > vsk->buffer_max_size) {
> > err = -EINVAL;
> > goto destroy;
> > }
> > @@ -1498,8 +1494,7 @@
> > vmci_transport_recv_connecting_client_invalid(struct sock *sk,
> > vsk->sent_request = false;
> > vsk->ignore_connecting_rst = true;
> >
> > - err = vmci_transport_send_conn_request(
> > - sk, vmci_trans(vsk)->queue_pair_size);
> > + err = vmci_transport_send_conn_request(sk, vsk-
> > >buffer_size);
> > if (err < 0)
> > err = vmci_transport_error_to_vsock_error(err);
> > else
> > @@ -1583,21 +1578,6 @@ static int vmci_transport_socket_init(struct
> > vsock_sock *vsk,
> > INIT_LIST_HEAD(&vmci_trans(vsk)->elem);
> > vmci_trans(vsk)->sk = &vsk->sk;
> > spin_lock_init(&vmci_trans(vsk)->lock);
> > - if (psk) {
> > - vmci_trans(vsk)->queue_pair_size =
> > - vmci_trans(psk)->queue_pair_size;
> > - vmci_trans(vsk)->queue_pair_min_size =
> > - vmci_trans(psk)->queue_pair_min_size;
> > - vmci_trans(vsk)->queue_pair_max_size =
> > - vmci_trans(psk)->queue_pair_max_size;
> > - } else {
> > - vmci_trans(vsk)->queue_pair_size =
> > - VMCI_TRANSPORT_DEFAULT_QP_SIZE;
> > - vmci_trans(vsk)->queue_pair_min_size =
> > - VMCI_TRANSPORT_DEFAULT_QP_SIZE_MIN;
> > - vmci_trans(vsk)->queue_pair_max_size =
> > - VMCI_TRANSPORT_DEFAULT_QP_SIZE_MAX;
> > - }
> >
> > return 0;
> > }
> > @@ -1813,8 +1793,7 @@ static int vmci_transport_connect(struct
> > vsock_sock *vsk)
> >
> > if (vmci_transport_old_proto_override(&old_pkt_proto) &&
> > old_pkt_proto) {
> > - err = vmci_transport_send_conn_request(
> > - sk, vmci_trans(vsk)->queue_pair_size);
> > + err = vmci_transport_send_conn_request(sk, vsk-
> > >buffer_size);
> > if (err < 0) {
> > sk->sk_state = TCP_CLOSE;
> > return err;
> > @@ -1822,8 +1801,7 @@ static int vmci_transport_connect(struct
> > vsock_sock *vsk)
> > } else {
> > int supported_proto_versions =
> > vmci_transport_new_proto_supported_versions();
> > - err = vmci_transport_send_conn_request2(
> > - sk, vmci_trans(vsk)->queue_pair_size,
> > + err = vmci_transport_send_conn_request2(sk, vsk-
> > >buffer_size,
> > supported_proto_versions);
> > if (err < 0) {
> > sk->sk_state = TCP_CLOSE;
> > @@ -1876,46 +1854,6 @@ static bool
> > vmci_transport_stream_is_active(struct vsock_sock *vsk)
> > return !vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle);
> > }
> >
> > -static u64 vmci_transport_get_buffer_size(struct vsock_sock *vsk) -{
> > - return vmci_trans(vsk)->queue_pair_size;
> > -}
> > -
> > -static u64 vmci_transport_get_min_buffer_size(struct vsock_sock *vsk) -{
> > - return vmci_trans(vsk)->queue_pair_min_size;
> > -}
> > -
> > -static u64 vmci_transport_get_max_buffer_size(struct vsock_sock *vsk) -{
> > - return vmci_trans(vsk)->queue_pair_max_size;
> > -}
> > -
> > -static void vmci_transport_set_buffer_size(struct vsock_sock *vsk, u64 val)
> > -{
> > - if (val < vmci_trans(vsk)->queue_pair_min_size)
> > - vmci_trans(vsk)->queue_pair_min_size = val;
> > - if (val > vmci_trans(vsk)->queue_pair_max_size)
> > - vmci_trans(vsk)->queue_pair_max_size = val;
> > - vmci_trans(vsk)->queue_pair_size = val;
> > -}
> > -
> > -static void vmci_transport_set_min_buffer_size(struct vsock_sock *vsk,
> > - u64 val)
> > -{
> > - if (val > vmci_trans(vsk)->queue_pair_size)
> > - vmci_trans(vsk)->queue_pair_size = val;
> > - vmci_trans(vsk)->queue_pair_min_size = val;
> > -}
> > -
> > -static void vmci_transport_set_max_buffer_size(struct vsock_sock *vsk,
> > - u64 val)
> > -{
> > - if (val < vmci_trans(vsk)->queue_pair_size)
> > - vmci_trans(vsk)->queue_pair_size = val;
> > - vmci_trans(vsk)->queue_pair_max_size = val;
> > -}
> > -
> > static int vmci_transport_notify_poll_in(
> > struct vsock_sock *vsk,
> > size_t target,
> > @@ -2098,12 +2036,6 @@ static const struct vsock_transport vmci_transport
> > = {
> > .notify_send_pre_enqueue =
> > vmci_transport_notify_send_pre_enqueue,
> > .notify_send_post_enqueue =
> > vmci_transport_notify_send_post_enqueue,
> > .shutdown = vmci_transport_shutdown,
> > - .set_buffer_size = vmci_transport_set_buffer_size,
> > - .set_min_buffer_size = vmci_transport_set_min_buffer_size,
> > - .set_max_buffer_size = vmci_transport_set_max_buffer_size,
> > - .get_buffer_size = vmci_transport_get_buffer_size,
> > - .get_min_buffer_size = vmci_transport_get_min_buffer_size,
> > - .get_max_buffer_size = vmci_transport_get_max_buffer_size,
> > .get_local_cid = vmci_transport_get_local_cid, };
> >
> > diff --git a/net/vmw_vsock/vmci_transport.h
> > b/net/vmw_vsock/vmci_transport.h index 1ca1e8640b31..b7b072194282
> > 100644
> > --- a/net/vmw_vsock/vmci_transport.h
> > +++ b/net/vmw_vsock/vmci_transport.h
> > @@ -108,9 +108,6 @@ struct vmci_transport {
> > struct vmci_qp *qpair;
> > u64 produce_size;
> > u64 consume_size;
> > - u64 queue_pair_size;
> > - u64 queue_pair_min_size;
> > - u64 queue_pair_max_size;
> > u32 detach_sub_id;
> > union vmci_transport_notify notify;
> > const struct vmci_transport_notify_ops *notify_ops;
> > --
> > 2.21.0
>
> Reviewed-by: Jorgen Hansen <jhansen@vmware.com>

Thanks for the reviews,
Stefano