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 | |
15 | struct 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 | |
31 | static inline bool ib_addr_any(const struct ib_addr *a) |
32 | { |
33 | return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); |
34 | } |
35 | |
36 | static 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 | |
42 | static 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 | |
51 | static 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 | |
56 | struct 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 | */ |
76 | static 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 | |