search for: virtio_vsock_op_attach

...ets, but Asias can clarify. > > Virtio VM socket connection creation: > > 1) Client sends VIRTIO_VSOCK_OP_REQUEST to server > > 2) Server reponses with VIRTIO_VSOCK_OP_NEGOTIATE to client > > 3) Client sends VIRTIO_VSOCK_OP_OFFER to server > > 4) Server responses with VIRTIO_VSOCK_OP_ATTACH to client > > What's the reason for a 4 stage setup? Most transports > make do with 3. I'm guessing that's also based on the original vSockets/VMCI implementation, where the NEGOTIATE/OFFER stages are used to negotiate the underlying transport buffer size (in VMCI, the queuep...

...ets, but Asias can clarify. > > Virtio VM socket connection creation: > > 1) Client sends VIRTIO_VSOCK_OP_REQUEST to server > > 2) Server reponses with VIRTIO_VSOCK_OP_NEGOTIATE to client > > 3) Client sends VIRTIO_VSOCK_OP_OFFER to server > > 4) Server responses with VIRTIO_VSOCK_OP_ATTACH to client > > What's the reason for a 4 stage setup? Most transports > make do with 3. I'm guessing that's also based on the original vSockets/VMCI implementation, where the NEGOTIATE/OFFER stages are used to negotiate the underlying transport buffer size (in VMCI, the queuep...

...AM. > op: specifies the operation of the packet, it is defined as follows. > > enum { > VIRTIO_VSOCK_OP_INVALID = 0, > VIRTIO_VSOCK_OP_REQUEST = 1, > VIRTIO_VSOCK_OP_NEGOTIATE = 2, > VIRTIO_VSOCK_OP_OFFER = 3, > VIRTIO_VSOCK_OP_ATTACH = 4, > VIRTIO_VSOCK_OP_RW = 5, > VIRTIO_VSOCK_OP_CREDIT = 6, > VIRTIO_VSOCK_OP_RST = 7, > VIRTIO_VSOCK_OP_SHUTDOWN = 8, > }; > > shut: specifies the shutdown mode when the socket is being shutdown. 1 is for > receive shutdo...

...K_DGRAM. > op: specifies the operation of the packet, it is defined as follows. > > enum { > VIRTIO_VSOCK_OP_INVALID = 0, > VIRTIO_VSOCK_OP_REQUEST = 1, > VIRTIO_VSOCK_OP_NEGOTIATE = 2, > VIRTIO_VSOCK_OP_OFFER = 3, > VIRTIO_VSOCK_OP_ATTACH = 4, > VIRTIO_VSOCK_OP_RW = 5, > VIRTIO_VSOCK_OP_CREDIT = 6, > VIRTIO_VSOCK_OP_RST = 7, > VIRTIO_VSOCK_OP_SHUTDOWN = 8, > }; > > shut: specifies the shutdown mode when the socket is being shutdown. 1 is for > receive shutdown,...

...the packet, it can be SOCK_STREAM or SOCK_DGRAM. op: specifies the operation of the packet, it is defined as follows. enum { VIRTIO_VSOCK_OP_INVALID = 0, VIRTIO_VSOCK_OP_REQUEST = 1, VIRTIO_VSOCK_OP_NEGOTIATE = 2, VIRTIO_VSOCK_OP_OFFER = 3, VIRTIO_VSOCK_OP_ATTACH = 4, VIRTIO_VSOCK_OP_RW = 5, VIRTIO_VSOCK_OP_CREDIT = 6, VIRTIO_VSOCK_OP_RST = 7, VIRTIO_VSOCK_OP_SHUTDOWN = 8, }; shut: specifies the shutdown mode when the socket is being shutdown. 1 is for receive shutdown, 2 is for transmit shutdown, 3 is for bot...

...the packet, it can be SOCK_STREAM or SOCK_DGRAM. op: specifies the operation of the packet, it is defined as follows. enum { VIRTIO_VSOCK_OP_INVALID = 0, VIRTIO_VSOCK_OP_REQUEST = 1, VIRTIO_VSOCK_OP_NEGOTIATE = 2, VIRTIO_VSOCK_OP_OFFER = 3, VIRTIO_VSOCK_OP_ATTACH = 4, VIRTIO_VSOCK_OP_RW = 5, VIRTIO_VSOCK_OP_CREDIT = 6, VIRTIO_VSOCK_OP_RST = 7, VIRTIO_VSOCK_OP_SHUTDOWN = 8, }; shut: specifies the shutdown mode when the socket is being shutdown. 1 is for receive shutdown, 2 is for transmit shutdown, 3 is for bot...

...+ __u32 len; > + __u8 type; > + __u8 op; > + __u8 shut; > + __u64 fwd_cnt; > + __u64 buf_alloc; > +} __packed; > + > +enum { > + VIRTIO_VSOCK_OP_INVALID = 0, > + VIRTIO_VSOCK_OP_REQUEST = 1, > + VIRTIO_VSOCK_OP_NEGOTIATE = 2, > + VIRTIO_VSOCK_OP_OFFER = 3, > + VIRTIO_VSOCK_OP_ATTACH = 4, > + VIRTIO_VSOCK_OP_RW = 5, > + VIRTIO_VSOCK_OP_CREDIT = 6, > + VIRTIO_VSOCK_OP_RST = 7, > + VIRTIO_VSOCK_OP_SHUTDOWN = 8, > +}; > + > +#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */ > diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common...

...+ __u32 len; > + __u8 type; > + __u8 op; > + __u8 shut; > + __u64 fwd_cnt; > + __u64 buf_alloc; > +} __packed; > + > +enum { > + VIRTIO_VSOCK_OP_INVALID = 0, > + VIRTIO_VSOCK_OP_REQUEST = 1, > + VIRTIO_VSOCK_OP_NEGOTIATE = 2, > + VIRTIO_VSOCK_OP_OFFER = 3, > + VIRTIO_VSOCK_OP_ATTACH = 4, > + VIRTIO_VSOCK_OP_RW = 5, > + VIRTIO_VSOCK_OP_CREDIT = 6, > + VIRTIO_VSOCK_OP_RST = 7, > + VIRTIO_VSOCK_OP_SHUTDOWN = 8, > +}; > + > +#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */ > diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common...

...32 src_cid; + __u32 src_port; + __u32 dst_cid; + __u32 dst_port; + __u32 len; + __u8 type; + __u8 op; + __u8 shut; + __u64 fwd_cnt; + __u64 buf_alloc; +} __packed; + +enum { + VIRTIO_VSOCK_OP_INVALID = 0, + VIRTIO_VSOCK_OP_REQUEST = 1, + VIRTIO_VSOCK_OP_NEGOTIATE = 2, + VIRTIO_VSOCK_OP_OFFER = 3, + VIRTIO_VSOCK_OP_ATTACH = 4, + VIRTIO_VSOCK_OP_RW = 5, + VIRTIO_VSOCK_OP_CREDIT = 6, + VIRTIO_VSOCK_OP_RST = 7, + VIRTIO_VSOCK_OP_SHUTDOWN = 8, +}; + +#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */ diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c new file mode 100644 index 0000000..0...

...bytes the receiver has forwarded to userspace. buf_alloc: specifies the size of the receiver's recieve buffer in bytes. Virtio VM socket connection creation: 1) Client sends VIRTIO_VSOCK_OP_REQUEST to server 2) Server responses with VIRTIO_VSOCK_OP_RESPONSE to client 3) Client responses with VIRTIO_VSOCK_OP_ATTACH to server Virtio VM socket credit update: Virtio VM socket uses credit-based flow control. The sender maintains tx_cnt which counts the totoal number of bytes it has sent out, peer_fwd_cnt which counts the totoal number of byes the receiver has forwarded, and peer_buf_alloc which is the size of th...

...bytes the receiver has forwarded to userspace. buf_alloc: specifies the size of the receiver's recieve buffer in bytes. Virtio VM socket connection creation: 1) Client sends VIRTIO_VSOCK_OP_REQUEST to server 2) Server responses with VIRTIO_VSOCK_OP_RESPONSE to client 3) Client responses with VIRTIO_VSOCK_OP_ATTACH to server Virtio VM socket credit update: Virtio VM socket uses credit-based flow control. The sender maintains tx_cnt which counts the totoal number of bytes it has sent out, peer_fwd_cnt which counts the totoal number of byes the receiver has forwarded, and peer_buf_alloc which is the size of th...