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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_H7#define _RDMA_IB_H8 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_addr823#define sib_addr16 ib_u.uib_addr1624#define sib_addr32 ib_u.uib_addr3225#define sib_addr64 ib_u.uib_addr6426#define sib_raw ib_u.uib_addr827#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() are68 * fundamentally unsafe, since there are lots of ways to trigger "write()"69 * calls from various contexts with elevated privileges. That includes the70 * traditional suid executable error message writes, but also various kernel71 * interfaces that can write to file descriptors.72 *73 * This function provides protection for the legacy API by restricting the74 * 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 */82