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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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99ce45d5e7
This change allows an extended address struct - struct sockaddr_mctp_ext - to be passed to sendmsg/recvmsg. This allows userspace to specify output ifindex and physical address information (for sendmsg) or receive the input ifindex/physaddr for incoming messages (for recvmsg). This is typically used by userspace for MCTP address discovery and assignment operations. The extended addressing facility is conditional on a new sockopt: MCTP_OPT_ADDR_EXT; userspace must explicitly enable addressing before the kernel will consume/populate the extended address data. Includes a fix for an uninitialised var: Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
50 lines
962 B
C
50 lines
962 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Management Component Transport Protocol (MCTP)
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*
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* Copyright (c) 2021 Code Construct
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* Copyright (c) 2021 Google
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*/
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#ifndef __UAPI_MCTP_H
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#define __UAPI_MCTP_H
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/netdevice.h>
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typedef __u8 mctp_eid_t;
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struct mctp_addr {
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mctp_eid_t s_addr;
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};
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struct sockaddr_mctp {
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__kernel_sa_family_t smctp_family;
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__u16 __smctp_pad0;
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unsigned int smctp_network;
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struct mctp_addr smctp_addr;
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__u8 smctp_type;
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__u8 smctp_tag;
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__u8 __smctp_pad1;
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};
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struct sockaddr_mctp_ext {
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struct sockaddr_mctp smctp_base;
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int smctp_ifindex;
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__u8 smctp_halen;
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__u8 __smctp_pad0[3];
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__u8 smctp_haddr[MAX_ADDR_LEN];
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};
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#define MCTP_NET_ANY 0x0
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#define MCTP_ADDR_NULL 0x00
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#define MCTP_ADDR_ANY 0xff
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#define MCTP_TAG_MASK 0x07
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#define MCTP_TAG_OWNER 0x08
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#define MCTP_OPT_ADDR_EXT 1
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#endif /* __UAPI_MCTP_H */
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