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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LNET
34 #include <linux/module.h>
35 #include <linux/kernel.h>
37 #include <linux/fs_struct.h>
38 #include <linux/sched.h>
39 #ifdef HAVE_SCHED_HEADERS
40 #include <linux/sched/signal.h>
41 #include <linux/sched/mm.h>
43 #include <linux/uaccess.h>
44 #include <libcfs/libcfs.h>
46 #if defined(CONFIG_KGDB)
50 #ifndef HAVE_KTIME_GET_TS64
51 void ktime_get_ts64(struct timespec64 *ts)
56 *ts = timespec_to_timespec64(now);
58 EXPORT_SYMBOL(ktime_get_ts64);
59 #endif /* HAVE_KTIME_GET_TS64 */
61 #ifndef HAVE_KTIME_GET_REAL_TS64
62 void ktime_get_real_ts64(struct timespec64 *ts)
67 *ts = timespec_to_timespec64(now);
69 EXPORT_SYMBOL(ktime_get_real_ts64);
70 #endif /* HAVE_KTIME_GET_REAL_TS64 */
72 #ifndef HAVE_KTIME_GET_REAL_SECONDS
74 * Get the seconds portion of CLOCK_REALTIME (wall clock).
75 * This is the clock that can be altered by NTP and is
76 * independent of a reboot.
78 time64_t ktime_get_real_seconds(void)
80 return (time64_t)get_seconds();
82 EXPORT_SYMBOL(ktime_get_real_seconds);
83 #endif /* HAVE_KTIME_GET_REAL_SECONDS */
85 #ifndef HAVE_KTIME_GET_SECONDS
87 * Get the seconds portion of CLOCK_MONOTONIC
88 * This clock is immutable and is reset across
89 * reboots. For older platforms this is a
90 * wrapper around get_seconds which is valid
91 * until 2038. By that time this will be gone
94 time64_t ktime_get_seconds(void)
96 struct timespec64 now;
101 EXPORT_SYMBOL(ktime_get_seconds);
102 #endif /* HAVE_KTIME_GET_SECONDS */
104 int cfs_kernel_write(struct file *filp, const void *buf, size_t count,
107 #ifdef HAVE_NEW_KERNEL_WRITE
108 return kernel_write(filp, buf, count, pos);
110 mm_segment_t __old_fs = get_fs();
114 rc = vfs_write(filp, (__force const char __user *)buf, count, pos);
120 EXPORT_SYMBOL(cfs_kernel_write);
122 #ifndef HAVE_KSET_FIND_OBJ
123 struct kobject *kset_find_obj(struct kset *kset, const char *name)
125 struct kobject *ret = NULL;
128 spin_lock(&kset->list_lock);
130 list_for_each_entry(k, &kset->list, entry) {
131 if (kobject_name(k) && !strcmp(kobject_name(k), name)) {
132 if (kref_get_unless_zero(&k->kref))
138 spin_unlock(&kset->list_lock);
141 EXPORT_SYMBOL_GPL(kset_find_obj);
144 #ifndef HAVE_KSTRTOBOOL_FROM_USER
145 int kstrtobool_from_user(const char __user *s, size_t count, bool *res)
147 /* Longest string needed to differentiate, newline, terminator */
150 count = min(count, sizeof(buf) - 1);
151 if (copy_from_user(buf, s, count))
154 return strtobool(buf, res);
156 EXPORT_SYMBOL(kstrtobool_from_user);
157 #endif /* !HAVE_KSTRTOBOOL_FROM_USER */
160 cfs_block_allsigs(void)
165 spin_lock_irqsave(¤t->sighand->siglock, flags);
166 old = current->blocked;
167 sigfillset(¤t->blocked);
169 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
172 EXPORT_SYMBOL(cfs_block_allsigs);
174 sigset_t cfs_block_sigs(unsigned long sigs)
179 spin_lock_irqsave(¤t->sighand->siglock, flags);
180 old = current->blocked;
181 sigaddsetmask(¤t->blocked, sigs);
183 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
186 EXPORT_SYMBOL(cfs_block_sigs);
188 /* Block all signals except for the @sigs */
189 sigset_t cfs_block_sigsinv(unsigned long sigs)
194 spin_lock_irqsave(¤t->sighand->siglock, flags);
195 old = current->blocked;
196 sigaddsetmask(¤t->blocked, ~sigs);
198 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
201 EXPORT_SYMBOL(cfs_block_sigsinv);
204 cfs_restore_sigs(sigset_t old)
208 spin_lock_irqsave(¤t->sighand->siglock, flags);
209 current->blocked = old;
211 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
213 EXPORT_SYMBOL(cfs_restore_sigs);
216 cfs_clear_sigpending(void)
220 spin_lock_irqsave(¤t->sighand->siglock, flags);
221 clear_tsk_thread_flag(current, TIF_SIGPENDING);
222 spin_unlock_irqrestore(¤t->sighand->siglock, flags);
224 EXPORT_SYMBOL(cfs_clear_sigpending);