Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* libcfs/libcfs/linux/linux-curproc.c
*
* Lustre curproc API implementation for Linux kernel
*
* Author: Nikita Danilov <nikita@clusterfs.com>
*/
#include <linux/sched.h>
#include <linux/fs_struct.h>
#include <linux/compat.h>
#include <linux/thread_info.h>
#define DEBUG_SUBSYSTEM S_LNET
#include "../../../include/linux/libcfs/libcfs.h"
/*
* Implementation of cfs_curproc API (see portals/include/libcfs/curproc.h)
* for Linux kernel.
*/
void cfs_cap_raise(cfs_cap_t cap)
{
struct cred *cred;
cred = prepare_creds();
if (cred) {
cap_raise(cred->cap_effective, cap);
commit_creds(cred);
}
}
void cfs_cap_lower(cfs_cap_t cap)
{
struct cred *cred;
cred = prepare_creds();
if (cred) {
cap_lower(cred->cap_effective, cap);
commit_creds(cred);
}
}
int cfs_cap_raised(cfs_cap_t cap)
{
return cap_raised(current_cap(), cap);
}
static void cfs_kernel_cap_pack(kernel_cap_t kcap, cfs_cap_t *cap)
{
/* XXX lost high byte */
*cap = kcap.cap[0];
}
cfs_cap_t cfs_curproc_cap_pack(void)
{
cfs_cap_t cap;
cfs_kernel_cap_pack(current_cap(), &cap);
return cap;
}
EXPORT_SYMBOL(cfs_cap_raise);
EXPORT_SYMBOL(cfs_cap_lower);
EXPORT_SYMBOL(cfs_cap_raised);
EXPORT_SYMBOL(cfs_curproc_cap_pack);
/*
* Local variables:
* c-indentation-style: "K&R"
* c-basic-offset: 8
* tab-width: 8
* fill-column: 80
* scroll-step: 1
* End:
*/
|