2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
4 * Copyright (c) 2010 Intel Corporation. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
37 #if !defined(_RDMA_IB_H)
40 #include <linux/types.h>
41 #include <linux/sched.h>
42 #include <linux/file.h>
45 * Define a native infiniband address as in Linux upstream
46 * 8d36eb01da5d371feffa280e501377b5c450f5a5
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]
66 static inline int ib_addr_any(const struct ib_addr *a)
68 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
71 static inline int ib_addr_loopback(const struct ib_addr *a)
73 return ((a->sib_addr32[0] | a->sib_addr32[1] |
74 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
77 static inline void ib_addr_set(struct ib_addr *addr,
78 __be32 w1, __be32 w2, __be32 w3, __be32 w4)
80 addr->sib_addr32[0] = w1;
81 addr->sib_addr32[1] = w2;
82 addr->sib_addr32[2] = w3;
83 addr->sib_addr32[3] = w4;
86 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
88 return memcmp(a1, a2, sizeof(struct ib_addr));
92 unsigned short int sib_family; /* AF_IB */
95 struct ib_addr sib_addr;
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.
108 * This function provides protection for the legacy API by restricting the
111 static inline bool ib_safe_file_access(struct file *filp)
113 struct thread *td = curthread;
116 * Check if called from userspace through a devfs related
117 * system call belonging to the given file:
119 return (filp->_file != NULL &&
120 filp->_file == td->td_fpop &&
121 filp->_file->f_cred == td->td_ucred);
124 #endif /* _RDMA_IB_H */