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, 2013, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
32 #define DEBUG_SUBSYSTEM S_LNET
34 #include <linux/module.h>
35 #include <linux/kernel.h>
37 #include <linux/sched.h>
38 #ifdef HAVE_SCHED_HEADERS
39 #include <linux/sched/mm.h>
41 #include <linux/slab.h>
42 #include <linux/uaccess.h>
43 #include <net/netlink.h>
45 #if defined(CONFIG_KGDB)
49 #include <libcfs/linux/linux-time.h>
50 #include <libcfs/linux/linux-wait.h>
51 #include <libcfs/linux/linux-misc.h>
53 #ifndef HAVE_KTIME_GET_TS64
54 void ktime_get_ts64(struct timespec64 *ts)
59 *ts = timespec_to_timespec64(now);
61 EXPORT_SYMBOL(ktime_get_ts64);
62 #endif /* HAVE_KTIME_GET_TS64 */
64 #ifndef HAVE_KTIME_GET_REAL_TS64
65 void ktime_get_real_ts64(struct timespec64 *ts)
70 *ts = timespec_to_timespec64(now);
72 EXPORT_SYMBOL(ktime_get_real_ts64);
73 #endif /* HAVE_KTIME_GET_REAL_TS64 */
75 #ifndef HAVE_KTIME_GET_REAL_SECONDS
77 * Get the seconds portion of CLOCK_REALTIME (wall clock).
78 * This is the clock that can be altered by NTP and is
79 * independent of a reboot.
81 time64_t ktime_get_real_seconds(void)
83 return (time64_t)get_seconds();
85 EXPORT_SYMBOL(ktime_get_real_seconds);
86 #endif /* HAVE_KTIME_GET_REAL_SECONDS */
88 #ifndef HAVE_KTIME_GET_SECONDS
90 * Get the seconds portion of CLOCK_MONOTONIC
91 * This clock is immutable and is reset across
92 * reboots. For older platforms this is a
93 * wrapper around get_seconds which is valid
94 * until 2038. By that time this will be gone
97 time64_t ktime_get_seconds(void)
99 struct timespec64 now;
101 ktime_get_ts64(&now);
104 EXPORT_SYMBOL(ktime_get_seconds);
105 #endif /* HAVE_KTIME_GET_SECONDS */
107 static int (*cfs_apply_workqueue_attrs_t)(struct workqueue_struct *wq,
108 const struct workqueue_attrs *attrs);
110 int cfs_apply_workqueue_attrs(struct workqueue_struct *wq,
111 const struct workqueue_attrs *attrs)
113 if (cfs_apply_workqueue_attrs_t)
114 return cfs_apply_workqueue_attrs_t(wq, attrs);
117 EXPORT_SYMBOL_GPL(cfs_apply_workqueue_attrs);
119 #ifndef HAVE_XARRAY_SUPPORT
120 struct kmem_cache (*radix_tree_node_cachep);
123 void __init cfs_arch_init(void)
125 #ifndef HAVE_WAIT_VAR_EVENT
128 cfs_apply_workqueue_attrs_t =
129 (void *)cfs_kallsyms_lookup_name("apply_workqueue_attrs");
130 #ifndef HAVE_XARRAY_SUPPORT
131 radix_tree_node_cachep =
132 (void *)cfs_kallsyms_lookup_name("radix_tree_node_cachep");
136 int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
139 #ifdef HAVE_NEW_KERNEL_WRITE
140 return kernel_write(filp, buf, count, pos);
142 mm_segment_t __old_fs = get_fs();
146 rc = vfs_write(filp, (__force const char __user *)buf, count, pos);
152 EXPORT_SYMBOL(cfs_kernel_write);
154 ssize_t cfs_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
156 #ifdef HAVE_KERNEL_READ_LAST_POSP
157 return kernel_read(file, buf, count, pos);
159 ssize_t size = kernel_read(file, *pos, buf, count);
166 EXPORT_SYMBOL(cfs_kernel_read);
168 #ifndef HAVE_KSET_FIND_OBJ
169 struct kobject *kset_find_obj(struct kset *kset, const char *name)
171 struct kobject *ret = NULL;
174 spin_lock(&kset->list_lock);
176 list_for_each_entry(k, &kset->list, entry) {
177 if (kobject_name(k) && !strcmp(kobject_name(k), name)) {
178 if (kref_get_unless_zero(&k->kref))
184 spin_unlock(&kset->list_lock);
187 EXPORT_SYMBOL_GPL(kset_find_obj);
190 #ifndef HAVE_KSTRTOBOOL_FROM_USER
191 int kstrtobool_from_user(const char __user *s, size_t count, bool *res)
193 /* Longest string needed to differentiate, newline, terminator */
196 count = min(count, sizeof(buf) - 1);
197 if (copy_from_user(buf, s, count))
200 return strtobool(buf, res);
202 EXPORT_SYMBOL(kstrtobool_from_user);
203 #endif /* !HAVE_KSTRTOBOOL_FROM_USER */
205 #ifndef HAVE_NLA_STRDUP
206 char *nla_strdup(const struct nlattr *nla, gfp_t flags)
208 size_t srclen = nla_len(nla);
209 char *src = nla_data(nla), *dst;
211 if (srclen > 0 && src[srclen - 1] == '\0')
214 dst = kmalloc(srclen + 1, flags);
216 memcpy(dst, src, srclen);
221 EXPORT_SYMBOL(nla_strdup);
222 #endif /* !HAVE_NLA_STRDUP */