forked from mirrors/linux
39289bfc22
So that rdma can work with CONFIG_KERNEL_HEADER_TEST and CONFIG_HEADERS_CHECK. Link: https://lore.kernel.org/r/20190722170126.GA16453@ziepe.ca Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/*
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* Copyright (c) 2010 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if !defined(_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() && !uaccess_kernel();
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}
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#endif /* _RDMA_IB_H */
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