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 42 struct 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 58 static inline bool ib_addr_any(const struct ib_addr *a) 59 { 60 return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); 61 } 62 63 static 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 69 static 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 78 static 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 83 struct 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 */ 103 static 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 */ 109