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 sigset_t
  88 cfs_block_allsigs(void)
  89 {
  90         unsigned long   flags;
  91         sigset_t        old;
  92
  93         spin_lock_irqsave(&current->sighand->siglock, flags);
  94         old = current->blocked;
  95         sigfillset(&current->blocked);
  96         recalc_sigpending();
  97         spin_unlock_irqrestore(&current->sighand->siglock, flags);
  98         return old;
  99 }
 100 EXPORT_SYMBOL(cfs_block_allsigs);
 101
 102 sigset_t cfs_block_sigs(unsigned long sigs)
 103 {
 104         unsigned long  flags;
 105         sigset_t        old;
 106
 107         spin_lock_irqsave(&current->sighand->siglock, flags);
 108         old = current->blocked;
 109         sigaddsetmask(&current->blocked, sigs);
 110         recalc_sigpending();
 111         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 112         return old;
 113 }
 114 EXPORT_SYMBOL(cfs_block_sigs);
 115
 116 /* Block all signals except for the @sigs */
 117 sigset_t cfs_block_sigsinv(unsigned long sigs)
 118 {
 119         unsigned long flags;
 120         sigset_t old;
 121
 122         spin_lock_irqsave(&current->sighand->siglock, flags);
 123         old = current->blocked;
 124         sigaddsetmask(&current->blocked, ~sigs);
 125         recalc_sigpending();
 126         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 127         return old;
 128 }
 129 EXPORT_SYMBOL(cfs_block_sigsinv);
 130
 131 void
 132 cfs_restore_sigs(sigset_t old)
 133 {
 134         unsigned long  flags;
 135
 136         spin_lock_irqsave(&current->sighand->siglock, flags);
 137         current->blocked = old;
 138         recalc_sigpending();
 139         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 140 }
 141 EXPORT_SYMBOL(cfs_restore_sigs);
 142
 143 void
 144 cfs_clear_sigpending(void)
 145 {
 146         unsigned long flags;
 147
 148         spin_lock_irqsave(&current->sighand->siglock, flags);
 149         clear_tsk_thread_flag(current, TIF_SIGPENDING);
 150         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 151 }
 152 EXPORT_SYMBOL(cfs_clear_sigpending);