990454b5a4
The VMCI context ID of a virtual machine may change at any time. There is a VMCI event which signals this but datagrams may be processed before this is handled. It is therefore necessary to be flexible about the destination context ID of any datagrams received. (It can be assumed to be correct because it is provided by the hypervisor.) The context ID on existing sockets should be updated to reflect how the hypervisor is currently referring to the system. Signed-off-by: Reilly Grant <grantr@vmware.com> Acked-by: Andy King <acking@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* VMware vSockets Driver
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*
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* Copyright (C) 2007-2012 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/stddef.h>
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#include <net/sock.h>
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#include "vsock_addr.h"
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void vsock_addr_init(struct sockaddr_vm *addr, u32 cid, u32 port)
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{
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memset(addr, 0, sizeof(*addr));
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addr->svm_family = AF_VSOCK;
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addr->svm_cid = cid;
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addr->svm_port = port;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_init);
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int vsock_addr_validate(const struct sockaddr_vm *addr)
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{
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if (!addr)
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return -EFAULT;
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if (addr->svm_family != AF_VSOCK)
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return -EAFNOSUPPORT;
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if (addr->svm_zero[0] != 0)
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return -EINVAL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_validate);
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bool vsock_addr_bound(const struct sockaddr_vm *addr)
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{
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return addr->svm_port != VMADDR_PORT_ANY;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_bound);
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void vsock_addr_unbind(struct sockaddr_vm *addr)
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{
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vsock_addr_init(addr, VMADDR_CID_ANY, VMADDR_PORT_ANY);
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}
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EXPORT_SYMBOL_GPL(vsock_addr_unbind);
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bool vsock_addr_equals_addr(const struct sockaddr_vm *addr,
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const struct sockaddr_vm *other)
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{
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return addr->svm_cid == other->svm_cid &&
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addr->svm_port == other->svm_port;
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}
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EXPORT_SYMBOL_GPL(vsock_addr_equals_addr);
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int vsock_addr_cast(const struct sockaddr *addr,
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size_t len, struct sockaddr_vm **out_addr)
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{
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if (len < sizeof(**out_addr))
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return -EFAULT;
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*out_addr = (struct sockaddr_vm *)addr;
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return vsock_addr_validate(*out_addr);
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}
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EXPORT_SYMBOL_GPL(vsock_addr_cast);
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