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