/* 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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(vorverarbeitet am 2026-09-28)
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