/*
   * Copyright (c) 2010 Intel Corporation.  All rights reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #if !defined(_RDMA_IB_H)
  #define _RDMA_IB_H
  
  #include <linux/types.h>

  #include <linux/sched.h>

  #include <linux/cred.h>

  
  struct ib_addr {
  	union {
  		__u8		uib_addr8[16];
  		__be16		uib_addr16[8];
  		__be32		uib_addr32[4];
  		__be64		uib_addr64[2];
  	} ib_u;
  #define sib_addr8		ib_u.uib_addr8
  #define sib_addr16		ib_u.uib_addr16
  #define sib_addr32		ib_u.uib_addr32
  #define sib_addr64		ib_u.uib_addr64
  #define sib_raw			ib_u.uib_addr8
  #define sib_subnet_prefix	ib_u.uib_addr64[0]
  #define sib_interface_id	ib_u.uib_addr64[1]
  };
  
  static inline int ib_addr_any(const struct ib_addr *a)
  {
  	return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
  }
  
  static inline int ib_addr_loopback(const struct ib_addr *a)
  {
  	return ((a->sib_addr32[0] | a->sib_addr32[1] |
  		 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
  }
  
  static inline void ib_addr_set(struct ib_addr *addr,
  			       __be32 w1, __be32 w2, __be32 w3, __be32 w4)
  {
  	addr->sib_addr32[0] = w1;
  	addr->sib_addr32[1] = w2;
  	addr->sib_addr32[2] = w3;
  	addr->sib_addr32[3] = w4;
  }
  
  static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
  {
  	return memcmp(a1, a2, sizeof(struct ib_addr));
  }
  
  struct sockaddr_ib {
  	unsigned short int	sib_family;	/* AF_IB */
  	__be16			sib_pkey;
  	__be32			sib_flowinfo;
  	struct ib_addr		sib_addr;
  	__be64			sib_sid;
  	__be64			sib_sid_mask;
  	__u64			sib_scope_id;
  };

  /*
   * The IB interfaces that use write() as bi-directional ioctl() are
   * fundamentally unsafe, since there are lots of ways to trigger "write()"
   * calls from various contexts with elevated privileges. That includes the
   * traditional suid executable error message writes, but also various kernel
   * interfaces that can write to file descriptors.
   *
   * This function provides protection for the legacy API by restricting the
   * calling context.
   */
  static inline bool ib_safe_file_access(struct file *filp)
  {

  	return filp->f_cred == current_cred() && !uaccess_kernel();

  }

  #endif /* _RDMA_IB_H */