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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LNET
  38 #include <linux/module.h>
  39 #include <linux/kernel.h>
  40 #include <linux/fs_struct.h>
  41 #include <linux/sched.h>
  42
  43 #include <libcfs/libcfs.h>
  44
  45 #if defined(CONFIG_KGDB)
  46 #include <asm/kgdb.h>
  47 #endif
  48
  49 void cfs_init_timer(struct timer_list *t)
  50 {
  51         init_timer(t);
  52 }
  53 EXPORT_SYMBOL(cfs_init_timer);
  54
  55 void cfs_timer_init(struct timer_list *t, cfs_timer_func_t *func, void *arg)
  56 {
  57         init_timer(t);
  58         t->function = func;
  59         t->data = (unsigned long)arg;
  60 }
  61 EXPORT_SYMBOL(cfs_timer_init);
  62
  63 void cfs_timer_arm(struct timer_list *t, cfs_time_t deadline)
  64 {
  65         mod_timer(t, deadline);
  66 }
  67 EXPORT_SYMBOL(cfs_timer_arm);
  68
  69 void cfs_timer_disarm(struct timer_list *t)
  70 {
  71         del_timer(t);
  72 }
  73 EXPORT_SYMBOL(cfs_timer_disarm);
  74
  75 int  cfs_timer_is_armed(struct timer_list *t)
  76 {
  77         return timer_pending(t);
  78 }
  79 EXPORT_SYMBOL(cfs_timer_is_armed);
  80
  81 cfs_time_t cfs_timer_deadline(struct timer_list *t)
  82 {
  83         return t->expires;
  84 }
  85 EXPORT_SYMBOL(cfs_timer_deadline);
  86
  87 #ifndef HAVE_KTIME_GET_REAL_TS64
  88 void ktime_get_real_ts64(struct timespec64 *ts)
  89 {
  90         *ts = timespec_to_timespec64(CURRENT_TIME);
  91 }
  92 EXPORT_SYMBOL(ktime_get_real_ts64);
  93 #endif /* HAVE_KTIME_GET_REAL_TS64 */
  94
  95 sigset_t
  96 cfs_block_allsigs(void)
  97 {
  98         unsigned long   flags;
  99         sigset_t        old;
 100
 101         spin_lock_irqsave(&current->sighand->siglock, flags);
 102         old = current->blocked;
 103         sigfillset(&current->blocked);
 104         recalc_sigpending();
 105         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 106         return old;
 107 }
 108 EXPORT_SYMBOL(cfs_block_allsigs);
 109
 110 sigset_t cfs_block_sigs(unsigned long sigs)
 111 {
 112         unsigned long  flags;
 113         sigset_t        old;
 114
 115         spin_lock_irqsave(&current->sighand->siglock, flags);
 116         old = current->blocked;
 117         sigaddsetmask(&current->blocked, sigs);
 118         recalc_sigpending();
 119         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 120         return old;
 121 }
 122 EXPORT_SYMBOL(cfs_block_sigs);
 123
 124 /* Block all signals except for the @sigs */
 125 sigset_t cfs_block_sigsinv(unsigned long sigs)
 126 {
 127         unsigned long flags;
 128         sigset_t old;
 129
 130         spin_lock_irqsave(&current->sighand->siglock, flags);
 131         old = current->blocked;
 132         sigaddsetmask(&current->blocked, ~sigs);
 133         recalc_sigpending();
 134         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 135         return old;
 136 }
 137 EXPORT_SYMBOL(cfs_block_sigsinv);
 138
 139 void
 140 cfs_restore_sigs(sigset_t old)
 141 {
 142         unsigned long  flags;
 143
 144         spin_lock_irqsave(&current->sighand->siglock, flags);
 145         current->blocked = old;
 146         recalc_sigpending();
 147         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 148 }
 149 EXPORT_SYMBOL(cfs_restore_sigs);
 150
 151 void
 152 cfs_clear_sigpending(void)
 153 {
 154         unsigned long flags;
 155
 156         spin_lock_irqsave(&current->sighand->siglock, flags);
 157         clear_tsk_thread_flag(current, TIF_SIGPENDING);
 158         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 159 }
 160 EXPORT_SYMBOL(cfs_clear_sigpending);