FreeBSD/Linux Kernel Cross Reference
sys/ofed/include/rdma/ib.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * 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.
     *
     * $FreeBSD$
     */
    
    #if !defined(_RDMA_IB_H)
    #define _RDMA_IB_H
    
    #include <linux/types.h>
    #include <linux/sched.h>
    #include <linux/file.h>
    
    /*
     * Define a native infiniband address as in Linux upstream
     * 8d36eb01da5d371feffa280e501377b5c450f5a5
     */
    #define AF_IB   41
    
    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)
   {
           struct thread *td = curthread;
   
           /*
            * Check if called from userspace through a devfs related
            * system call belonging to the given file:
            */
           return (filp->_file != NULL &&
                   filp->_file == td->td_fpop &&
                   filp->_file->f_cred == td->td_ucred);
   }
   
   #endif /* _RDMA_IB_H */

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