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

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  1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
  2 /*
  3  * Copyright (c) 2010 Intel Corporation.  All rights reserved.
  4  */
  5 
  6 #ifndef _RDMA_IB_H
  7 #define _RDMA_IB_H
  8 
  9 #include <linux/types.h>
 10 #include <linux/sched.h>
 11 #include <linux/cred.h>
 12 #include <linux/uaccess.h>
 13 #include <linux/fs.h>
 14 
 15 struct ib_addr {
 16         union {
 17                 __u8            uib_addr8[16];
 18                 __be16          uib_addr16[8];
 19                 __be32          uib_addr32[4];
 20                 __be64          uib_addr64[2];
 21         } ib_u;
 22 #define sib_addr8               ib_u.uib_addr8
 23 #define sib_addr16              ib_u.uib_addr16
 24 #define sib_addr32              ib_u.uib_addr32
 25 #define sib_addr64              ib_u.uib_addr64
 26 #define sib_raw                 ib_u.uib_addr8
 27 #define sib_subnet_prefix       ib_u.uib_addr64[0]
 28 #define sib_interface_id        ib_u.uib_addr64[1]
 29 };
 30 
 31 static inline bool ib_addr_any(const struct ib_addr *a)
 32 {
 33         return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
 34 }
 35 
 36 static inline bool ib_addr_loopback(const struct ib_addr *a)
 37 {
 38         return ((a->sib_addr32[0] | a->sib_addr32[1] |
 39                  a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
 40 }
 41 
 42 static inline void ib_addr_set(struct ib_addr *addr,
 43                                __be32 w1, __be32 w2, __be32 w3, __be32 w4)
 44 {
 45         addr->sib_addr32[0] = w1;
 46         addr->sib_addr32[1] = w2;
 47         addr->sib_addr32[2] = w3;
 48         addr->sib_addr32[3] = w4;
 49 }
 50 
 51 static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
 52 {
 53         return memcmp(a1, a2, sizeof(struct ib_addr));
 54 }
 55 
 56 struct sockaddr_ib {
 57         unsigned short int      sib_family;     /* AF_IB */
 58         __be16                  sib_pkey;
 59         __be32                  sib_flowinfo;
 60         struct ib_addr          sib_addr;
 61         __be64                  sib_sid;
 62         __be64                  sib_sid_mask;
 63         __u64                   sib_scope_id;
 64 };
 65 
 66 /*
 67  * The IB interfaces that use write() as bi-directional ioctl() are
 68  * fundamentally unsafe, since there are lots of ways to trigger "write()"
 69  * calls from various contexts with elevated privileges. That includes the
 70  * traditional suid executable error message writes, but also various kernel
 71  * interfaces that can write to file descriptors.
 72  *
 73  * This function provides protection for the legacy API by restricting the
 74  * calling context.
 75  */
 76 static inline bool ib_safe_file_access(struct file *filp)
 77 {
 78         return filp->f_cred == current_cred() && !uaccess_kernel();
 79 }
 80 
 81 #endif /* _RDMA_IB_H */
 82 

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