1/*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2010 Intel Corporation.  All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses.  You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $FreeBSD: stable/11/sys/ofed/include/rdma/ib.h 331772 2018-03-30 18:17:33Z hselasky $
35 */
36
37#if !defined(_RDMA_IB_H)
38#define _RDMA_IB_H
39
40#include <linux/types.h>
41#include <linux/sched.h>
42#include <linux/file.h>
43
44/*
45 * Define a native infiniband address as in Linux upstream
46 * 8d36eb01da5d371feffa280e501377b5c450f5a5
47 */
48#define	AF_IB	41
49
50struct ib_addr {
51	union {
52		__u8		uib_addr8[16];
53		__be16		uib_addr16[8];
54		__be32		uib_addr32[4];
55		__be64		uib_addr64[2];
56	} ib_u;
57#define sib_addr8		ib_u.uib_addr8
58#define sib_addr16		ib_u.uib_addr16
59#define sib_addr32		ib_u.uib_addr32
60#define sib_addr64		ib_u.uib_addr64
61#define sib_raw			ib_u.uib_addr8
62#define sib_subnet_prefix	ib_u.uib_addr64[0]
63#define sib_interface_id	ib_u.uib_addr64[1]
64};
65
66static inline int ib_addr_any(const struct ib_addr *a)
67{
68	return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
69}
70
71static inline int ib_addr_loopback(const struct ib_addr *a)
72{
73	return ((a->sib_addr32[0] | a->sib_addr32[1] |
74		 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
75}
76
77static inline void ib_addr_set(struct ib_addr *addr,
78			       __be32 w1, __be32 w2, __be32 w3, __be32 w4)
79{
80	addr->sib_addr32[0] = w1;
81	addr->sib_addr32[1] = w2;
82	addr->sib_addr32[2] = w3;
83	addr->sib_addr32[3] = w4;
84}
85
86static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
87{
88	return memcmp(a1, a2, sizeof(struct ib_addr));
89}
90
91struct sockaddr_ib {
92	unsigned short int	sib_family;	/* AF_IB */
93	__be16			sib_pkey;
94	__be32			sib_flowinfo;
95	struct ib_addr		sib_addr;
96	__be64			sib_sid;
97	__be64			sib_sid_mask;
98	__u64			sib_scope_id;
99};
100
101/*
102 * The IB interfaces that use write() as bi-directional ioctl() are
103 * fundamentally unsafe, since there are lots of ways to trigger "write()"
104 * calls from various contexts with elevated privileges. That includes the
105 * traditional suid executable error message writes, but also various kernel
106 * interfaces that can write to file descriptors.
107 *
108 * This function provides protection for the legacy API by restricting the
109 * calling context.
110 */
111static inline bool ib_safe_file_access(struct file *filp)
112{
113	struct thread *td = curthread;
114
115	/*
116	 * Check if called from userspace through a devfs related
117	 * system call belonging to the given file:
118	 */
119	return (filp->_file != NULL &&
120		filp->_file == td->td_fpop &&
121		filp->_file->f_cred == td->td_ucred);
122}
123
124#endif /* _RDMA_IB_H */
125