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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Management Component Transport Protocol (MCTP)
*
* Copyright (c) 2021 Code Construct
* Copyright (c) 2021 Google
*/
#ifndef __UAPI_MCTP_H
#define __UAPI_MCTP_H
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/netdevice.h>
typedef __u8 mctp_eid_t;
struct mctp_addr {
mctp_eid_t s_addr;
};
struct sockaddr_mctp {
__kernel_sa_family_t smctp_family;
__u16 __smctp_pad0;
unsigned int smctp_network;
struct mctp_addr smctp_addr;
__u8 smctp_type;
__u8 smctp_tag;
__u8 __smctp_pad1;
};
struct sockaddr_mctp_ext {
struct sockaddr_mctp smctp_base;
int smctp_ifindex;
__u8 smctp_halen;
__u8 __smctp_pad0[3];
__u8 smctp_haddr[MAX_ADDR_LEN];
};
#define MCTP_NET_ANY 0x0
#define MCTP_ADDR_NULL 0x00
#define MCTP_ADDR_ANY 0xff
#define MCTP_TAG_MASK 0x07
#define MCTP_TAG_OWNER 0x08
#define MCTP_TAG_PREALLOC 0x10
#define MCTP_OPT_ADDR_EXT 1
#define SIOCMCTPALLOCTAG (SIOCPROTOPRIVATE + 0)
#define SIOCMCTPDROPTAG (SIOCPROTOPRIVATE + 1)
#define SIOCMCTPALLOCTAG2 (SIOCPROTOPRIVATE + 2)
#define SIOCMCTPDROPTAG2 (SIOCPROTOPRIVATE + 3)
/* Deprecated: use mctp_ioc_tag_ctl2 / TAG2 ioctls instead, which defines the
* MCTP network ID as part of the allocated tag. Using this assumes the default
* net ID for allocated tags, which may not give correct behaviour on system
* with multiple networks configured.
*/
struct mctp_ioc_tag_ctl {
mctp_eid_t peer_addr;
/* For SIOCMCTPALLOCTAG: must be passed as zero, kernel will
* populate with the allocated tag value. Returned tag value will
* always have TO and PREALLOC set.
*
* For SIOCMCTPDROPTAG: userspace provides tag value to drop, from
* a prior SIOCMCTPALLOCTAG call (and so must have TO and PREALLOC set).
*/
__u8 tag;
__u16 flags;
};
struct mctp_ioc_tag_ctl2 {
/* Peer details: network ID, peer EID, local EID. All set by the
* caller.
*
* Local EID must be MCTP_ADDR_NULL or MCTP_ADDR_ANY in current
* kernels.
*/
unsigned int net;
mctp_eid_t peer_addr;
mctp_eid_t local_addr;
/* Set by caller, but no flags defined currently. Must be 0 */
__u16 flags;
/* For SIOCMCTPALLOCTAG2: must be passed as zero, kernel will
* populate with the allocated tag value. Returned tag value will
* always have TO and PREALLOC set.
*
* For SIOCMCTPDROPTAG2: userspace provides tag value to drop, from
* a prior SIOCMCTPALLOCTAG2 call (and so must have TO and PREALLOC set).
*/
__u8 tag;
};
#endif /* __UAPI_MCTP_H */
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