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 40 struct ib_addr { 41 union { 42 __u8 uib_addr8[16]; 43 __be16 uib_addr16[8]; 44 __be32 uib_addr32[4]; 45 __be64 uib_addr64[2]; 46 } ib_u; 47 #define sib_addr8 ib_u.uib_addr8 48 #define sib_addr16 ib_u.uib_addr16 49 #define sib_addr32 ib_u.uib_addr32 50 #define sib_addr64 ib_u.uib_addr64 51 #define sib_raw ib_u.uib_addr8 52 #define sib_subnet_prefix ib_u.uib_addr64[0] 53 #define sib_interface_id ib_u.uib_addr64[1] 54 }; 55 56 static inline int ib_addr_any(const struct ib_addr *a) 57 { 58 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); 59 } 60 61 static inline int ib_addr_loopback(const struct ib_addr *a) 62 { 63 return ((a->sib_addr32[0] | a->sib_addr32[1] | 64 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0); 65 } 66 67 static inline void ib_addr_set(struct ib_addr *addr, 68 __be32 w1, __be32 w2, __be32 w3, __be32 w4) 69 { 70 addr->sib_addr32[0] = w1; 71 addr->sib_addr32[1] = w2; 72 addr->sib_addr32[2] = w3; 73 addr->sib_addr32[3] = w4; 74 } 75 76 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2) 77 { 78 return memcmp(a1, a2, sizeof(struct ib_addr)); 79 } 80 81 struct sockaddr_ib { 82 unsigned short int sib_family; /* AF_IB */ 83 __be16 sib_pkey; 84 __be32 sib_flowinfo; 85 struct ib_addr sib_addr; 86 __be64 sib_sid; 87 __be64 sib_sid_mask; 88 __u64 sib_scope_id; 89 }; 90 91 /* 92 * The IB interfaces that use write() as bi-directional ioctl() are 93 * fundamentally unsafe, since there are lots of ways to trigger "write()" 94 * calls from various contexts with elevated privileges. That includes the 95 * traditional suid executable error message writes, but also various kernel 96 * interfaces that can write to file descriptors. 97 * 98 * This function provides protection for the legacy API by restricting the 99 * calling context. 100 */ 101 static inline bool ib_safe_file_access(struct file *filp) 102 { 103 return filp->f_cred == current_cred() && !uaccess_kernel(); 104 } 105 106 #endif /* _RDMA_IB_H */ 107