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 #ifdef HAVE_SYSCTL_CTLNAME
42 #define INIT_CTL_NAME .ctl_name = CTL_UNNUMBERED,
43 #define INIT_STRATEGY .strategy = &sysctl_intvec,
49 #ifndef HAVE_IOV_ITER_TYPE
50 #ifdef HAVE_IOV_ITER_HAS_TYPE_MEMBER
51 #define iter_is_iovec(iter) ((iter)->type & ITER_IOVEC)
52 #define iov_iter_is_kvec(iter) ((iter)->type & ITER_KVEC)
53 #define iov_iter_is_bvec(iter) ((iter)->type & ITER_BVEC)
54 #define iov_iter_is_pipe(iter) ((iter)->type & ITER_PIPE)
55 #define iov_iter_is_discard(iter) ((iter)->type & ITER_DISCARD)
57 #define iter_is_iovec(iter) 1
58 #define iov_iter_is_kvec(iter) 0
59 #define iov_iter_is_bvec(iter) 0
60 #define iov_iter_is_pipe(iter) 0
61 #define iov_iter_is_discard(iter) 0
63 #endif /* HAVE_IOV_ITER_TYPE */
65 #ifndef HAVE_MODULE_PARAM_LOCKING
66 static DEFINE_MUTEX(param_lock);
69 #ifndef HAVE_UIDGID_HEADER
71 #ifndef _LINUX_UIDGID_H
72 #define _LINUX_UIDGID_H
77 #define INVALID_UID -1
78 #define INVALID_GID -1
80 #define GLOBAL_ROOT_UID 0
81 #define GLOBAL_ROOT_GID 0
83 static inline uid_t __kuid_val(kuid_t uid)
88 static inline gid_t __kgid_val(kgid_t gid)
93 static inline kuid_t make_kuid(struct user_namespace *from, uid_t uid)
98 static inline kgid_t make_kgid(struct user_namespace *from, gid_t gid)
103 static inline uid_t from_kuid(struct user_namespace *to, kuid_t uid)
108 static inline gid_t from_kgid(struct user_namespace *to, kgid_t gid)
113 static inline bool uid_eq(kuid_t left, kuid_t right)
115 return left == right;
118 static inline bool uid_valid(kuid_t uid)
120 return uid != (typeof(uid))INVALID_UID;
123 static inline bool gid_valid(kgid_t gid)
125 return gid != (typeof(gid))INVALID_GID;
127 #endif /* _LINUX_UIDGID_H */
131 int cfs_get_environ(const char *key, char *value, int *val_len);
133 int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
135 ssize_t cfs_kernel_read(struct file *file, void *buf, size_t count,
139 * For RHEL6 struct kernel_parm_ops doesn't exist. Also
140 * the arguments for .set and .get take different
141 * parameters which is handled below
143 #ifdef HAVE_KERNEL_PARAM_OPS
144 #define cfs_kernel_param_arg_t const struct kernel_param
146 #define cfs_kernel_param_arg_t struct kernel_param_ops
147 #define kernel_param_ops kernel_param
148 #endif /* ! HAVE_KERNEL_PARAM_OPS */
150 #ifndef HAVE_KERNEL_PARAM_LOCK
151 static inline void kernel_param_unlock(struct module *mod)
153 #ifndef HAVE_MODULE_PARAM_LOCKING
154 mutex_unlock(¶m_lock);
156 __kernel_param_unlock();
160 static inline void kernel_param_lock(struct module *mod)
162 #ifndef HAVE_MODULE_PARAM_LOCKING
163 mutex_lock(¶m_lock);
165 __kernel_param_lock();
168 #endif /* ! HAVE_KERNEL_PARAM_LOCK */
170 #ifndef HAVE_KSTRTOUL
171 static inline int kstrtoul(const char *s, unsigned int base, unsigned long *res)
173 char *end = (char *)s;
175 *res = simple_strtoul(s, &end, base);
180 #endif /* !HAVE_KSTRTOUL */
182 #ifndef HAVE_KSTRTOBOOL_FROM_USER
184 #define kstrtobool strtobool
186 int kstrtobool_from_user(const char __user *s, size_t count, bool *res);