diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/libcfs/linux/linux-curproc.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/libcfs/linux/linux-curproc.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-curproc.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-curproc.c new file mode 100644 index 000000000000..13d31e8a931d --- /dev/null +++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-curproc.c @@ -0,0 +1,111 @@ +/* + * 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, 2015, 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); + } +} +EXPORT_SYMBOL(cfs_cap_raise); + +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); + } +} +EXPORT_SYMBOL(cfs_cap_lower); + +int cfs_cap_raised(cfs_cap_t cap) +{ + return cap_raised(current_cap(), cap); +} +EXPORT_SYMBOL(cfs_cap_raised); + +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_curproc_cap_pack); + +/* + * Local variables: + * c-indentation-style: "K&R" + * c-basic-offset: 8 + * tab-width: 8 + * fill-column: 80 + * scroll-step: 1 + * End: + */ |