82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2010 Intel Corporation. All rights reserved.
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*/
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#ifndef _RDMA_IB_H
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#define _RDMA_IB_H
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/cred.h>
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#include <linux/uaccess.h>
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#include <linux/fs.h>
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struct ib_addr {
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union {
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__u8 uib_addr8[16];
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__be16 uib_addr16[8];
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__be32 uib_addr32[4];
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__be64 uib_addr64[2];
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} ib_u;
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#define sib_addr8 ib_u.uib_addr8
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#define sib_addr16 ib_u.uib_addr16
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#define sib_addr32 ib_u.uib_addr32
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#define sib_addr64 ib_u.uib_addr64
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#define sib_raw ib_u.uib_addr8
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#define sib_subnet_prefix ib_u.uib_addr64[0]
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#define sib_interface_id ib_u.uib_addr64[1]
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};
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static inline bool ib_addr_any(const struct ib_addr *a)
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{
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return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
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}
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static inline bool ib_addr_loopback(const struct ib_addr *a)
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{
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return ((a->sib_addr32[0] | a->sib_addr32[1] |
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a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
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}
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static inline void ib_addr_set(struct ib_addr *addr,
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__be32 w1, __be32 w2, __be32 w3, __be32 w4)
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{
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addr->sib_addr32[0] = w1;
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addr->sib_addr32[1] = w2;
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addr->sib_addr32[2] = w3;
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addr->sib_addr32[3] = w4;
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}
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static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
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{
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return memcmp(a1, a2, sizeof(struct ib_addr));
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}
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struct sockaddr_ib {
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unsigned short int sib_family; /* AF_IB */
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__be16 sib_pkey;
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__be32 sib_flowinfo;
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struct ib_addr sib_addr;
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__be64 sib_sid;
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__be64 sib_sid_mask;
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__u64 sib_scope_id;
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};
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/*
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* The IB interfaces that use write() as bi-directional ioctl() are
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* fundamentally unsafe, since there are lots of ways to trigger "write()"
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* calls from various contexts with elevated privileges. That includes the
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* traditional suid executable error message writes, but also various kernel
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* interfaces that can write to file descriptors.
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*
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* This function provides protection for the legacy API by restricting the
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* calling context.
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*/
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static inline bool ib_safe_file_access(struct file *filp)
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{
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return filp->f_cred == current_cred();
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}
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#endif /* _RDMA_IB_H */
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