ib.h (2117B)
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 */