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/* 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();
}
#endif /* _RDMA_IB_H */
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