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https://github.com/torvalds/linux
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cada7ccd9d
Check if the provided flags value from the vsock address data structure includes the supported flags in the corresponding kernel version. The first byte of the "svm_zero" field is used as "svm_flags", so add the flags check instead. Changelog v3 -> v4 * New patch in v4. Signed-off-by: Andra Paraschiv <andraprs@amazon.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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 <net/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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__u8 svm_valid_flags = VMADDR_FLAG_TO_HOST;
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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_flags & ~svm_valid_flags)
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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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