1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Management Component Transport Protocol (MCTP) 4 * 5 * Copyright (c) 2021 Code Construct 6 * Copyright (c) 2021 Google 7 */ 8 9 #ifndef __UAPI_MCTP_H 10 #define __UAPI_MCTP_H 11 12 #include <linux/types.h> 13 #include <linux/socket.h> 14 #include <linux/netdevice.h> 15 16 typedef __u8 mctp_eid_t; 17 18 struct mctp_addr { 19 mctp_eid_t s_addr; 20 }; 21 22 struct sockaddr_mctp { 23 __kernel_sa_family_t smctp_family; 24 __u16 __smctp_pad0; 25 unsigned int smctp_network; 26 struct mctp_addr smctp_addr; 27 __u8 smctp_type; 28 __u8 smctp_tag; 29 __u8 __smctp_pad1; 30 }; 31 32 struct sockaddr_mctp_ext { 33 struct sockaddr_mctp smctp_base; 34 int smctp_ifindex; 35 __u8 smctp_halen; 36 __u8 __smctp_pad0[3]; 37 __u8 smctp_haddr[MAX_ADDR_LEN]; 38 }; 39 40 #define MCTP_NET_ANY 0x0 41 42 #define MCTP_ADDR_NULL 0x00 43 #define MCTP_ADDR_ANY 0xff 44 45 #define MCTP_TAG_MASK 0x07 46 #define MCTP_TAG_OWNER 0x08 47 #define MCTP_TAG_PREALLOC 0x10 48 49 #define MCTP_OPT_ADDR_EXT 1 50 51 #define SIOCMCTPALLOCTAG (SIOCPROTOPRIVATE + 0) 52 #define SIOCMCTPDROPTAG (SIOCPROTOPRIVATE + 1) 53 #define SIOCMCTPALLOCTAG2 (SIOCPROTOPRIVATE + 2) 54 #define SIOCMCTPDROPTAG2 (SIOCPROTOPRIVATE + 3) 55 56 /* Deprecated: use mctp_ioc_tag_ctl2 / TAG2 ioctls instead, which defines the 57 * MCTP network ID as part of the allocated tag. Using this assumes the default 58 * net ID for allocated tags, which may not give correct behaviour on system 59 * with multiple networks configured. 60 */ 61 struct mctp_ioc_tag_ctl { 62 mctp_eid_t peer_addr; 63 64 /* For SIOCMCTPALLOCTAG: must be passed as zero, kernel will 65 * populate with the allocated tag value. Returned tag value will 66 * always have TO and PREALLOC set. 67 * 68 * For SIOCMCTPDROPTAG: userspace provides tag value to drop, from 69 * a prior SIOCMCTPALLOCTAG call (and so must have TO and PREALLOC set). 70 */ 71 __u8 tag; 72 __u16 flags; 73 }; 74 75 struct mctp_ioc_tag_ctl2 { 76 /* Peer details: network ID, peer EID, local EID. All set by the 77 * caller. 78 * 79 * Local EID must be MCTP_ADDR_NULL or MCTP_ADDR_ANY in current 80 * kernels. 81 */ 82 unsigned int net; 83 mctp_eid_t peer_addr; 84 mctp_eid_t local_addr; 85 86 /* Set by caller, but no flags defined currently. Must be 0 */ 87 __u16 flags; 88 89 /* For SIOCMCTPALLOCTAG2: must be passed as zero, kernel will 90 * populate with the allocated tag value. Returned tag value will 91 * always have TO and PREALLOC set. 92 * 93 * For SIOCMCTPDROPTAG2: userspace provides tag value to drop, from 94 * a prior SIOCMCTPALLOCTAG2 call (and so must have TO and PREALLOC set). 95 */ 96 __u8 tag; 97 98 }; 99 100 #endif /* __UAPI_MCTP_H */ 101