cregit-Linux how code gets into the kernel

Release 4.12 include/rdma/ib.h

Directory: include/rdma
/*
 * Copyright (c) 2010 Intel Corporation.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#if !defined(_RDMA_IB_H)

#define _RDMA_IB_H

#include <linux/types.h>
#include <linux/sched.h>
#include <linux/cred.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 int ib_addr_any(const struct ib_addr *a) { return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); }

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Sean Hefty34100.00%1100.00%
Total34100.00%1100.00%


static inline int 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); }

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Sean Hefty55100.00%1100.00%
Total55100.00%1100.00%


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; }

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Sean Hefty60100.00%1100.00%
Total60100.00%1100.00%


static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2) { return memcmp(a1, a2, sizeof(struct ib_addr)); }

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Sean Hefty33100.00%1100.00%
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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(); }

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Jason Gunthorpe2291.67%150.00%
Al Viro28.33%150.00%
Total24100.00%2100.00%

#endif /* _RDMA_IB_H */

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Sean Hefty29190.37%125.00%
Jason Gunthorpe268.07%125.00%
Ingo Molnar30.93%125.00%
Al Viro20.62%125.00%
Total322100.00%4100.00%
Directory: include/rdma
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