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5bba272807
Disassemble a one-for-all soshutdown() into protocol specific methods. This creates a small amount of copy & paste, but makes code a lot more self documented, as protocol specific method would execute only the code that is relevant to that protocol and nothing else. This also fixes a couple recent regressions and reduces risk of future regressions. The extended KPI for the new pr_shutdown removes need for the extra pr_flush which was added for the sake of SCTP which could not perform its shutdown properly with the old one. Particularly for SCTP this change streamlines a lot of code. Some notes on why certain parts of code were copied or were not to certain protocols: * The (SS_ISCONNECTED | SS_ISCONNECTING | SS_ISDISCONNECTING) check is needed only for those protocols that may be connected or disconnected. * The above reduces into only SS_ISCONNECTED for those protocols that always connect instantly. * The ENOTCONN and continue processing hack is left only for datagram protocols. * The SOLISTENING(so) block is copied to those protocols that listen(2). * sorflush() on SHUT_RD is copied almost to every protocol, but that will be refactored later. * wakeup(&so->so_timeo) is copied to protocols that can make a non-instant connect(2), can SO_LINGER or can accept(2). There are three protocols (netgraph(4), Bluetooth, SDP) that did not have pr_shutdown, but old soshutdown() would still perform sorflush() on SHUT_RD for them and also wakeup(9). Those protocols partially supported shutdown(2) returning EOPNOTSUP for SHUT_WR/SHUT_RDWR, now they fully lost shutdown(2) support. I'm pretty sure netgraph(4) and Bluetooth are okay about that and SDP is almost abandoned anyway. Reviewed by: tuexen Differential Revision: https://reviews.freebsd.org/D43413
119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Microsoft Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _HVSOCK_H
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#define _HVSOCK_H
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/queue.h>
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#include <dev/hyperv/include/hyperv.h>
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#include <dev/hyperv/include/vmbus.h>
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/*
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* HyperV Socket Protocols
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*/
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#define HYPERV_SOCK_PROTO_TRANS 1 /* Transport protocol */
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#define HVADDR_PORT_ANY -1U
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#define HVADDR_PORT_UNKNOWN -1U
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#define HVS_LIST_BOUND 0x01
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#define HVS_LIST_CONNECTED 0x02
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#define HVS_LIST_ALL (HVS_LIST_BOUND | HVS_LIST_CONNECTED)
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struct sockaddr_hvs {
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unsigned char sa_len;
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sa_family_t sa_family;
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unsigned int hvs_port;
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unsigned char hvs_zero[sizeof(struct sockaddr) -
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sizeof(sa_family_t) -
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sizeof(unsigned char) -
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sizeof(unsigned int)];
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};
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struct vmpipe_proto_header {
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uint32_t vmpipe_pkt_type;
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uint32_t vmpipe_data_size;
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} __packed;
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struct hvs_pkt_header {
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struct vmbus_chanpkt_hdr chan_pkt_hdr;
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struct vmpipe_proto_header vmpipe_pkt_hdr;
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} __packed;
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struct hvs_pcb {
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struct socket *so; /* Pointer to socket */
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struct sockaddr_hvs local_addr;
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struct sockaddr_hvs remote_addr;
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struct hyperv_guid vm_srv_id;
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struct hyperv_guid host_srv_id;
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struct vmbus_channel *chan;
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/* Current packet header on rx ring */
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struct hvs_pkt_header hvs_pkt;
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/* Available data in receive br in current packet */
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uint32_t recv_data_len;
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/* offset in the packet */
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uint32_t recv_data_off;
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bool rb_init;
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/* Link lists for global bound and connected sockets */
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LIST_ENTRY(hvs_pcb) bound_next;
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LIST_ENTRY(hvs_pcb) connected_next;
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};
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#define so2hvspcb(so) \
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((struct hvs_pcb *)((so)->so_pcb))
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#define hsvpcb2so(hvspcb) \
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((struct socket *)((hvspcb)->so))
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void hvs_addr_init(struct sockaddr_hvs *, const struct hyperv_guid *);
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void hvs_trans_close(struct socket *);
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void hvs_trans_detach(struct socket *);
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void hvs_trans_abort(struct socket *);
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int hvs_trans_attach(struct socket *, int, struct thread *);
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int hvs_trans_bind(struct socket *, struct sockaddr *, struct thread *);
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int hvs_trans_listen(struct socket *, int, struct thread *);
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int hvs_trans_accept(struct socket *, struct sockaddr *);
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int hvs_trans_connect(struct socket *,
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struct sockaddr *, struct thread *);
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int hvs_trans_peeraddr(struct socket *, struct sockaddr *);
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int hvs_trans_sockaddr(struct socket *, struct sockaddr *);
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int hvs_trans_soreceive(struct socket *, struct sockaddr **,
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struct uio *, struct mbuf **, struct mbuf **, int *);
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int hvs_trans_sosend(struct socket *, struct sockaddr *, struct uio *,
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struct mbuf *, struct mbuf *, int, struct thread *);
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int hvs_trans_disconnect(struct socket *);
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int hvs_trans_shutdown(struct socket *, enum shutdown_how);
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int hvs_trans_lock(void);
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void hvs_trans_unlock(void);
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void hvs_remove_socket_from_list(struct socket *, unsigned char);
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#endif /* _HVSOCK_H */
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