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 39 struct ib_addr { 40 union { 41 __u8 uib_addr8[16]; 42 __be16 uib_addr16[8]; 43 __be32 uib_addr32[4]; 44 __be64 uib_addr64[2]; 45 } ib_u; 46 #define sib_addr8 ib_u.uib_addr8 47 #define sib_addr16 ib_u.uib_addr16 48 #define sib_addr32 ib_u.uib_addr32 49 #define sib_addr64 ib_u.uib_addr64 50 #define sib_raw ib_u.uib_addr8 51 #define sib_subnet_prefix ib_u.uib_addr64[0] 52 #define sib_interface_id ib_u.uib_addr64[1] 53 }; 54 55 static inline int ib_addr_any(const struct ib_addr *a) 56 { 57 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); 58 } 59 60 static inline int ib_addr_loopback(const struct ib_addr *a) 61 { 62 return ((a->sib_addr32[0] | a->sib_addr32[1] | 63 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0); 64 } 65 66 static inline void ib_addr_set(struct ib_addr *addr, 67 __be32 w1, __be32 w2, __be32 w3, __be32 w4) 68 { 69 addr->sib_addr32[0] = w1; 70 addr->sib_addr32[1] = w2; 71 addr->sib_addr32[2] = w3; 72 addr->sib_addr32[3] = w4; 73 } 74 75 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2) 76 { 77 return memcmp(a1, a2, sizeof(struct ib_addr)); 78 } 79 80 struct sockaddr_ib { 81 unsigned short int sib_family; /* AF_IB */ 82 __be16 sib_pkey; 83 __be32 sib_flowinfo; 84 struct ib_addr sib_addr; 85 __be64 sib_sid; 86 __be64 sib_sid_mask; 87 __u64 sib_scope_id; 88 }; 89 90 /* 91 * The IB interfaces that use write() as bi-directional ioctl() are 92 * fundamentally unsafe, since there are lots of ways to trigger "write()" 93 * calls from various contexts with elevated privileges. That includes the 94 * traditional suid executable error message writes, but also various kernel 95 * interfaces that can write to file descriptors. 96 * 97 * This function provides protection for the legacy API by restricting the 98 * calling context. 99 */ 100 static inline bool ib_safe_file_access(struct file *filp) 101 { 102 return filp->f_cred == current_cred() && segment_eq(get_fs(), USER_DS); 103 } 104 105 #endif /* _RDMA_IB_H */ 106