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 /* A "fully qualified" MCTP address, which includes the system-local network ID, 41 * required to uniquely resolve a routable EID. 42 */ 43 struct mctp_fq_addr { 44 unsigned int net; 45 mctp_eid_t eid; 46 }; 47 48 #define MCTP_NET_ANY 0x0 49 50 #define MCTP_ADDR_NULL 0x00 51 #define MCTP_ADDR_ANY 0xff 52 53 #define MCTP_TAG_MASK 0x07 54 #define MCTP_TAG_OWNER 0x08 55 #define MCTP_TAG_PREALLOC 0x10 56 57 #define MCTP_OPT_ADDR_EXT 1 58 59 #define SIOCMCTPALLOCTAG (SIOCPROTOPRIVATE + 0) 60 #define SIOCMCTPDROPTAG (SIOCPROTOPRIVATE + 1) 61 #define SIOCMCTPALLOCTAG2 (SIOCPROTOPRIVATE + 2) 62 #define SIOCMCTPDROPTAG2 (SIOCPROTOPRIVATE + 3) 63 64 /* Deprecated: use mctp_ioc_tag_ctl2 / TAG2 ioctls instead, which defines the 65 * MCTP network ID as part of the allocated tag. Using this assumes the default 66 * net ID for allocated tags, which may not give correct behaviour on system 67 * with multiple networks configured. 68 */ 69 struct mctp_ioc_tag_ctl { 70 mctp_eid_t peer_addr; 71 72 /* For SIOCMCTPALLOCTAG: must be passed as zero, kernel will 73 * populate with the allocated tag value. Returned tag value will 74 * always have TO and PREALLOC set. 75 * 76 * For SIOCMCTPDROPTAG: userspace provides tag value to drop, from 77 * a prior SIOCMCTPALLOCTAG call (and so must have TO and PREALLOC set). 78 */ 79 __u8 tag; 80 __u16 flags; 81 }; 82 83 struct mctp_ioc_tag_ctl2 { 84 /* Peer details: network ID, peer EID, local EID. All set by the 85 * caller. 86 * 87 * Local EID must be MCTP_ADDR_NULL or MCTP_ADDR_ANY in current 88 * kernels. 89 */ 90 unsigned int net; 91 mctp_eid_t peer_addr; 92 mctp_eid_t local_addr; 93 94 /* Set by caller, but no flags defined currently. Must be 0 */ 95 __u16 flags; 96 97 /* For SIOCMCTPALLOCTAG2: must be passed as zero, kernel will 98 * populate with the allocated tag value. Returned tag value will 99 * always have TO and PREALLOC set. 100 * 101 * For SIOCMCTPDROPTAG2: userspace provides tag value to drop, from 102 * a prior SIOCMCTPALLOCTAG2 call (and so must have TO and PREALLOC set). 103 */ 104 __u8 tag; 105 106 }; 107 108 #endif /* __UAPI_MCTP_H */ 109