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TOMOYO Linux Cross Reference
Linux/include/rdma/ib.h

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  1 /*
  2  * Copyright (c) 2010 Intel Corporation.  All rights reserved.
  3  *
  4  * This software is available to you under a choice of one of two
  5  * licenses.  You may choose to be licensed under the terms of the GNU
  6  * General Public License (GPL) Version 2, available from the file
  7  * COPYING in the main directory of this source tree, or the
  8  * OpenIB.org BSD license below:
  9  *
 10  *     Redistribution and use in source and binary forms, with or
 11  *     without modification, are permitted provided that the following
 12  *     conditions are met:
 13  *
 14  *      - Redistributions of source code must retain the above
 15  *        copyright notice, this list of conditions and the following
 16  *        disclaimer.
 17  *
 18  *      - Redistributions in binary form must reproduce the above
 19  *        copyright notice, this list of conditions and the following
 20  *        disclaimer in the documentation and/or other materials
 21  *        provided with the distribution.
 22  *
 23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30  * SOFTWARE.
 31  */
 32 
 33 #if !defined(_RDMA_IB_H)
 34 #define _RDMA_IB_H
 35 
 36 #include <linux/types.h>
 37 #include <linux/sched.h>
 38 #include <linux/cred.h>
 39 #include <linux/uaccess.h>
 40 #include <linux/fs.h>
 41 
 42 struct ib_addr {
 43         union {
 44                 __u8            uib_addr8[16];
 45                 __be16          uib_addr16[8];
 46                 __be32          uib_addr32[4];
 47                 __be64          uib_addr64[2];
 48         } ib_u;
 49 #define sib_addr8               ib_u.uib_addr8
 50 #define sib_addr16              ib_u.uib_addr16
 51 #define sib_addr32              ib_u.uib_addr32
 52 #define sib_addr64              ib_u.uib_addr64
 53 #define sib_raw                 ib_u.uib_addr8
 54 #define sib_subnet_prefix       ib_u.uib_addr64[0]
 55 #define sib_interface_id        ib_u.uib_addr64[1]
 56 };
 57 
 58 static inline bool ib_addr_any(const struct ib_addr *a)
 59 {
 60         return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
 61 }
 62 
 63 static inline bool ib_addr_loopback(const struct ib_addr *a)
 64 {
 65         return ((a->sib_addr32[0] | a->sib_addr32[1] |
 66                  a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
 67 }
 68 
 69 static inline void ib_addr_set(struct ib_addr *addr,
 70                                __be32 w1, __be32 w2, __be32 w3, __be32 w4)
 71 {
 72         addr->sib_addr32[0] = w1;
 73         addr->sib_addr32[1] = w2;
 74         addr->sib_addr32[2] = w3;
 75         addr->sib_addr32[3] = w4;
 76 }
 77 
 78 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
 79 {
 80         return memcmp(a1, a2, sizeof(struct ib_addr));
 81 }
 82 
 83 struct sockaddr_ib {
 84         unsigned short int      sib_family;     /* AF_IB */
 85         __be16                  sib_pkey;
 86         __be32                  sib_flowinfo;
 87         struct ib_addr          sib_addr;
 88         __be64                  sib_sid;
 89         __be64                  sib_sid_mask;
 90         __u64                   sib_scope_id;
 91 };
 92 
 93 /*
 94  * The IB interfaces that use write() as bi-directional ioctl() are
 95  * fundamentally unsafe, since there are lots of ways to trigger "write()"
 96  * calls from various contexts with elevated privileges. That includes the
 97  * traditional suid executable error message writes, but also various kernel
 98  * interfaces that can write to file descriptors.
 99  *
100  * This function provides protection for the legacy API by restricting the
101  * calling context.
102  */
103 static inline bool ib_safe_file_access(struct file *filp)
104 {
105         return filp->f_cred == current_cred() && !uaccess_kernel();
106 }
107 
108 #endif /* _RDMA_IB_H */
109 

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