82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
|
|
/*
|
|
* Copyright (c) 2010 Intel Corporation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _RDMA_IB_H
|
|
#define _RDMA_IB_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/cred.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/fs.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 bool ib_addr_any(const struct ib_addr *a)
|
|
{
|
|
return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
|
|
}
|
|
|
|
static inline bool 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 */
|