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