4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #ifndef __LIBCFS_LINUX_MISC_H__
34 #define __LIBCFS_LINUX_MISC_H__
37 #include <linux/mutex.h>
38 #include <linux/user_namespace.h>
39 #include <linux/uio.h>
41 #ifndef HAVE_IOV_ITER_TYPE
42 #ifdef HAVE_IOV_ITER_HAS_TYPE_MEMBER
43 #define iter_is_iovec(iter) ((iter)->type & ITER_IOVEC)
44 #define iov_iter_is_kvec(iter) ((iter)->type & ITER_KVEC)
45 #define iov_iter_is_bvec(iter) ((iter)->type & ITER_BVEC)
46 #define iov_iter_is_pipe(iter) ((iter)->type & ITER_PIPE)
47 #define iov_iter_is_discard(iter) ((iter)->type & ITER_DISCARD)
49 #define iter_is_iovec(iter) 1
50 #define iov_iter_is_kvec(iter) 0
51 #define iov_iter_is_bvec(iter) 0
52 #define iov_iter_is_pipe(iter) 0
53 #define iov_iter_is_discard(iter) 0
55 #endif /* HAVE_IOV_ITER_TYPE */
57 int cfs_get_environ(const char *key, char *value, int *val_len);
59 int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
61 ssize_t cfs_kernel_read(struct file *file, void *buf, size_t count,
65 * For RHEL6 struct kernel_parm_ops doesn't exist. Also
66 * the arguments for .set and .get take different
67 * parameters which is handled below
69 #ifdef HAVE_KERNEL_PARAM_OPS
70 #define cfs_kernel_param_arg_t const struct kernel_param
72 #define cfs_kernel_param_arg_t struct kernel_param_ops
73 #define kernel_param_ops kernel_param
74 #endif /* ! HAVE_KERNEL_PARAM_OPS */
76 #ifndef HAVE_KERNEL_PARAM_LOCK
77 static inline void kernel_param_unlock(struct module *mod)
79 __kernel_param_unlock();
82 static inline void kernel_param_lock(struct module *mod)
84 __kernel_param_lock();
86 #endif /* ! HAVE_KERNEL_PARAM_LOCK */
88 #ifndef HAVE_KSTRTOBOOL_FROM_USER
90 #define kstrtobool strtobool
92 int kstrtobool_from_user(const char __user *s, size_t count, bool *res);