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