libcfs/libcfs/linux/linux-prim.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2013, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_LNET
  34 #include <linux/module.h>
  35 #include <linux/kernel.h>
  36 #include <linux/fs_struct.h>
  37 #include <linux/sched.h>
  38
  39 #include <libcfs/libcfs.h>
  40
  41 #if defined(CONFIG_KGDB)
  42 #include <asm/kgdb.h>
  43 #endif
  44
  45 void cfs_init_timer(struct timer_list *t)
  46 {
  47         init_timer(t);
  48 }
  49 EXPORT_SYMBOL(cfs_init_timer);
  50
  51 void cfs_timer_init(struct timer_list *t, cfs_timer_func_t *func, void *arg)
  52 {
  53         init_timer(t);
  54         t->function = func;
  55         t->data = (unsigned long)arg;
  56 }
  57 EXPORT_SYMBOL(cfs_timer_init);
  58
  59 void cfs_timer_arm(struct timer_list *t, cfs_time_t deadline)
  60 {
  61         mod_timer(t, deadline);
  62 }
  63 EXPORT_SYMBOL(cfs_timer_arm);
  64
  65 void cfs_timer_disarm(struct timer_list *t)
  66 {
  67         del_timer(t);
  68 }
  69 EXPORT_SYMBOL(cfs_timer_disarm);
  70
  71 int  cfs_timer_is_armed(struct timer_list *t)
  72 {
  73         return timer_pending(t);
  74 }
  75 EXPORT_SYMBOL(cfs_timer_is_armed);
  76
  77 cfs_time_t cfs_timer_deadline(struct timer_list *t)
  78 {
  79         return t->expires;
  80 }
  81 EXPORT_SYMBOL(cfs_timer_deadline);
  82
  83 #ifndef HAVE_KTIME_GET_REAL_TS64
  84 void ktime_get_real_ts64(struct timespec64 *ts)
  85 {
  86         *ts = timespec_to_timespec64(CURRENT_TIME);
  87 }
  88 EXPORT_SYMBOL(ktime_get_real_ts64);
  89 #endif /* HAVE_KTIME_GET_REAL_TS64 */
  90
  91 sigset_t
  92 cfs_block_allsigs(void)
  93 {
  94         unsigned long   flags;
  95         sigset_t        old;
  96
  97         spin_lock_irqsave(&current->sighand->siglock, flags);
  98         old = current->blocked;
  99         sigfillset(&current->blocked);
 100         recalc_sigpending();
 101         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 102         return old;
 103 }
 104 EXPORT_SYMBOL(cfs_block_allsigs);
 105
 106 sigset_t cfs_block_sigs(unsigned long sigs)
 107 {
 108         unsigned long  flags;
 109         sigset_t        old;
 110
 111         spin_lock_irqsave(&current->sighand->siglock, flags);
 112         old = current->blocked;
 113         sigaddsetmask(&current->blocked, sigs);
 114         recalc_sigpending();
 115         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 116         return old;
 117 }
 118 EXPORT_SYMBOL(cfs_block_sigs);
 119
 120 /* Block all signals except for the @sigs */
 121 sigset_t cfs_block_sigsinv(unsigned long sigs)
 122 {
 123         unsigned long flags;
 124         sigset_t old;
 125
 126         spin_lock_irqsave(&current->sighand->siglock, flags);
 127         old = current->blocked;
 128         sigaddsetmask(&current->blocked, ~sigs);
 129         recalc_sigpending();
 130         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 131         return old;
 132 }
 133 EXPORT_SYMBOL(cfs_block_sigsinv);
 134
 135 void
 136 cfs_restore_sigs(sigset_t old)
 137 {
 138         unsigned long  flags;
 139
 140         spin_lock_irqsave(&current->sighand->siglock, flags);
 141         current->blocked = old;
 142         recalc_sigpending();
 143         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 144 }
 145 EXPORT_SYMBOL(cfs_restore_sigs);
 146
 147 void
 148 cfs_clear_sigpending(void)
 149 {
 150         unsigned long flags;
 151
 152         spin_lock_irqsave(&current->sighand->siglock, flags);
 153         clear_tsk_thread_flag(current, TIF_SIGPENDING);
 154         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 155 }
 156 EXPORT_SYMBOL(cfs_clear_sigpending);