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 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 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 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 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 */ 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