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/*
* 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>
/*
* 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() && segment_eq(get_fs(), USER_DS);
}
#endif /* _RDMA_IB_H */
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