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 void cfs_enter_debugger(void)
  88 {
  89 #if defined(CONFIG_KGDB)
  90 //        BREAKPOINT();
  91 #else
  92         /* nothing */
  93 #endif
  94 }
  95 EXPORT_SYMBOL(cfs_enter_debugger);
  96
  97 sigset_t
  98 cfs_block_allsigs(void)
  99 {
 100         unsigned long   flags;
 101         sigset_t        old;
 102
 103         spin_lock_irqsave(&current->sighand->siglock, flags);
 104         old = current->blocked;
 105         sigfillset(&current->blocked);
 106         recalc_sigpending();
 107         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 108         return old;
 109 }
 110 EXPORT_SYMBOL(cfs_block_allsigs);
 111
 112 sigset_t cfs_block_sigs(unsigned long sigs)
 113 {
 114         unsigned long  flags;
 115         sigset_t        old;
 116
 117         spin_lock_irqsave(&current->sighand->siglock, flags);
 118         old = current->blocked;
 119         sigaddsetmask(&current->blocked, sigs);
 120         recalc_sigpending();
 121         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 122         return old;
 123 }
 124 EXPORT_SYMBOL(cfs_block_sigs);
 125
 126 /* Block all signals except for the @sigs */
 127 sigset_t cfs_block_sigsinv(unsigned long sigs)
 128 {
 129         unsigned long flags;
 130         sigset_t old;
 131
 132         spin_lock_irqsave(&current->sighand->siglock, flags);
 133         old = current->blocked;
 134         sigaddsetmask(&current->blocked, ~sigs);
 135         recalc_sigpending();
 136         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 137         return old;
 138 }
 139 EXPORT_SYMBOL(cfs_block_sigsinv);
 140
 141 void
 142 cfs_restore_sigs(sigset_t old)
 143 {
 144         unsigned long  flags;
 145
 146         spin_lock_irqsave(&current->sighand->siglock, flags);
 147         current->blocked = old;
 148         recalc_sigpending();
 149         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 150 }
 151 EXPORT_SYMBOL(cfs_restore_sigs);
 152
 153 void
 154 cfs_clear_sigpending(void)
 155 {
 156         unsigned long flags;
 157
 158         spin_lock_irqsave(&current->sighand->siglock, flags);
 159         clear_tsk_thread_flag(current, TIF_SIGPENDING);
 160         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 161 }
 162 EXPORT_SYMBOL(cfs_clear_sigpending);