1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2/*
3 * Copyright (c) 2010 Intel Corporation. All rights reserved.
4 */
5
6#ifndef _RDMA_IB_H
7#define _RDMA_IB_H
8
9#include <linux/types.h>
10#include <linux/sched.h>
11#include <linux/cred.h>
12#include <linux/uaccess.h>
13#include <linux/fs.h>
14
15struct ib_addr {
16 union {
17 __u8 uib_addr8[16];
18 __be16 uib_addr16[8];
19 __be32 uib_addr32[4];
20 __be64 uib_addr64[2];
21 } ib_u;
22#define sib_addr8 ib_u.uib_addr8
23#define sib_addr16 ib_u.uib_addr16
24#define sib_addr32 ib_u.uib_addr32
25#define sib_addr64 ib_u.uib_addr64
26#define sib_raw ib_u.uib_addr8
27#define sib_subnet_prefix ib_u.uib_addr64[0]
28#define sib_interface_id ib_u.uib_addr64[1]
29};
30
31static inline bool ib_addr_any(const struct ib_addr *a)
32{
33 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
34}
35
36static inline bool ib_addr_loopback(const struct ib_addr *a)
37{
38 return ((a->sib_addr32[0] | a->sib_addr32[1] |
39 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
40}
41
42static inline void ib_addr_set(struct ib_addr *addr,
43 __be32 w1, __be32 w2, __be32 w3, __be32 w4)
44{
45 addr->sib_addr32[0] = w1;
46 addr->sib_addr32[1] = w2;
47 addr->sib_addr32[2] = w3;
48 addr->sib_addr32[3] = w4;
49}
50
51static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
52{
53 return memcmp(p: a1, q: a2, size: sizeof(struct ib_addr));
54}
55
56struct sockaddr_ib {
57 unsigned short int sib_family; /* AF_IB */
58 __be16 sib_pkey;
59 __be32 sib_flowinfo;
60 struct ib_addr sib_addr;
61 __be64 sib_sid;
62 __be64 sib_sid_mask;
63 __u64 sib_scope_id;
64};
65
66/*
67 * The IB interfaces that use write() as bi-directional ioctl() are
68 * fundamentally unsafe, since there are lots of ways to trigger "write()"
69 * calls from various contexts with elevated privileges. That includes the
70 * traditional suid executable error message writes, but also various kernel
71 * interfaces that can write to file descriptors.
72 *
73 * This function provides protection for the legacy API by restricting the
74 * calling context.
75 */
76static inline bool ib_safe_file_access(struct file *filp)
77{
78 return filp->f_cred == current_cred();
79}
80
81#endif /* _RDMA_IB_H */
82

source code of linux/include/rdma/ib.h