Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (c) 2010 Intel Corporation.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #ifndef _RDMA_IB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #define _RDMA_IB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/cred.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct ib_addr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		__u8		uib_addr8[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		__be16		uib_addr16[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		__be32		uib_addr32[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		__be64		uib_addr64[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	} ib_u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define sib_addr8		ib_u.uib_addr8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define sib_addr16		ib_u.uib_addr16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define sib_addr32		ib_u.uib_addr32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define sib_addr64		ib_u.uib_addr64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define sib_raw			ib_u.uib_addr8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define sib_subnet_prefix	ib_u.uib_addr64[0]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define sib_interface_id	ib_u.uib_addr64[1]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static inline bool ib_addr_any(const struct ib_addr *a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static inline bool ib_addr_loopback(const struct ib_addr *a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return ((a->sib_addr32[0] | a->sib_addr32[1] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		 a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static inline void ib_addr_set(struct ib_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 			       __be32 w1, __be32 w2, __be32 w3, __be32 w4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	addr->sib_addr32[0] = w1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	addr->sib_addr32[1] = w2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	addr->sib_addr32[2] = w3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	addr->sib_addr32[3] = w4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	return memcmp(a1, a2, sizeof(struct ib_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct sockaddr_ib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	unsigned short int	sib_family;	/* AF_IB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	__be16			sib_pkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	__be32			sib_flowinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	struct ib_addr		sib_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	__be64			sib_sid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	__be64			sib_sid_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	__u64			sib_scope_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)  * The IB interfaces that use write() as bi-directional ioctl() are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)  * fundamentally unsafe, since there are lots of ways to trigger "write()"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)  * calls from various contexts with elevated privileges. That includes the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)  * traditional suid executable error message writes, but also various kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)  * interfaces that can write to file descriptors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)  * This function provides protection for the legacy API by restricting the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)  * calling context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static inline bool ib_safe_file_access(struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	return filp->f_cred == current_cred() && !uaccess_kernel();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #endif /* _RDMA_IB_H */