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
35 #if !defined(_RDMA_IB_H)
36 #define _RDMA_IB_H
37
38 #include <linux/types.h>
39 #include <linux/sched.h>
40 #include <linux/file.h>
41
42 /*
43 * Define a native infiniband address as in Linux upstream
44 * 8d36eb01da5d371feffa280e501377b5c450f5a5
45 */
46 #define AF_IB 41
47
48 struct ib_addr {
49 union {
50 __u8 uib_addr8[16];
51 __be16 uib_addr16[8];
52 __be32 uib_addr32[4];
53 __be64 uib_addr64[2];
54 } ib_u;
55 #define sib_addr8 ib_u.uib_addr8
56 #define sib_addr16 ib_u.uib_addr16
57 #define sib_addr32 ib_u.uib_addr32
58 #define sib_addr64 ib_u.uib_addr64
59 #define sib_raw ib_u.uib_addr8
60 #define sib_subnet_prefix ib_u.uib_addr64[0]
61 #define sib_interface_id ib_u.uib_addr64[1]
62 };
63
ib_addr_any(const struct ib_addr * a)64 static inline int ib_addr_any(const struct ib_addr *a)
65 {
66 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
67 }
68
ib_addr_loopback(const struct ib_addr * a)69 static inline int ib_addr_loopback(const struct ib_addr *a)
70 {
71 return ((a->sib_addr32[0] | a->sib_addr32[1] |
72 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
73 }
74
ib_addr_set(struct ib_addr * addr,__be32 w1,__be32 w2,__be32 w3,__be32 w4)75 static inline void ib_addr_set(struct ib_addr *addr,
76 __be32 w1, __be32 w2, __be32 w3, __be32 w4)
77 {
78 addr->sib_addr32[0] = w1;
79 addr->sib_addr32[1] = w2;
80 addr->sib_addr32[2] = w3;
81 addr->sib_addr32[3] = w4;
82 }
83
ib_addr_cmp(const struct ib_addr * a1,const struct ib_addr * a2)84 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
85 {
86 return memcmp(a1, a2, sizeof(struct ib_addr));
87 }
88
89 struct sockaddr_ib {
90 unsigned short int sib_family; /* AF_IB */
91 __be16 sib_pkey;
92 __be32 sib_flowinfo;
93 struct ib_addr sib_addr;
94 __be64 sib_sid;
95 __be64 sib_sid_mask;
96 __u64 sib_scope_id;
97 };
98
99 /*
100 * The IB interfaces that use write() as bi-directional ioctl() are
101 * fundamentally unsafe, since there are lots of ways to trigger "write()"
102 * calls from various contexts with elevated privileges. That includes the
103 * traditional suid executable error message writes, but also various kernel
104 * interfaces that can write to file descriptors.
105 *
106 * This function provides protection for the legacy API by restricting the
107 * calling context.
108 */
ib_safe_file_access(struct file * filp)109 static inline bool ib_safe_file_access(struct file *filp)
110 {
111 struct thread *td = curthread;
112
113 /*
114 * Check if called from userspace through a devfs related
115 * system call belonging to the given file:
116 */
117 return (filp->_file != NULL &&
118 filp->_file == td->td_fpop &&
119 filp->_file->f_cred == td->td_ucred);
120 }
121
122 #endif /* _RDMA_IB_H */
123