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_done(struct timer_list *t)
  64 {
  65         return;
  66 }
  67 EXPORT_SYMBOL(cfs_timer_done);
  68
  69 void cfs_timer_arm(struct timer_list *t, cfs_time_t deadline)
  70 {
  71         mod_timer(t, deadline);
  72 }
  73 EXPORT_SYMBOL(cfs_timer_arm);
  74
  75 void cfs_timer_disarm(struct timer_list *t)
  76 {
  77         del_timer(t);
  78 }
  79 EXPORT_SYMBOL(cfs_timer_disarm);
  80
  81 int  cfs_timer_is_armed(struct timer_list *t)
  82 {
  83         return timer_pending(t);
  84 }
  85 EXPORT_SYMBOL(cfs_timer_is_armed);
  86
  87 cfs_time_t cfs_timer_deadline(struct timer_list *t)
  88 {
  89         return t->expires;
  90 }
  91 EXPORT_SYMBOL(cfs_timer_deadline);
  92
  93 void cfs_enter_debugger(void)
  94 {
  95 #if defined(CONFIG_KGDB)
  96 //        BREAKPOINT();
  97 #else
  98         /* nothing */
  99 #endif
 100 }
 101
 102 sigset_t
 103 cfs_block_allsigs(void)
 104 {
 105         unsigned long   flags;
 106         sigset_t        old;
 107
 108         spin_lock_irqsave(&current->sighand->siglock, flags);
 109         old = current->blocked;
 110         sigfillset(&current->blocked);
 111         recalc_sigpending();
 112         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 113         return old;
 114 }
 115
 116 sigset_t cfs_block_sigs(unsigned long sigs)
 117 {
 118         unsigned long  flags;
 119         sigset_t        old;
 120
 121         spin_lock_irqsave(&current->sighand->siglock, flags);
 122         old = current->blocked;
 123         sigaddsetmask(&current->blocked, sigs);
 124         recalc_sigpending();
 125         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 126         return old;
 127 }
 128
 129 /* Block all signals except for the @sigs */
 130 sigset_t cfs_block_sigsinv(unsigned long sigs)
 131 {
 132         unsigned long flags;
 133         sigset_t old;
 134
 135         spin_lock_irqsave(&current->sighand->siglock, flags);
 136         old = current->blocked;
 137         sigaddsetmask(&current->blocked, ~sigs);
 138         recalc_sigpending();
 139         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 140         return old;
 141 }
 142
 143 void
 144 cfs_restore_sigs(sigset_t old)
 145 {
 146         unsigned long  flags;
 147
 148         spin_lock_irqsave(&current->sighand->siglock, flags);
 149         current->blocked = old;
 150         recalc_sigpending();
 151         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 152 }
 153
 154 int
 155 cfs_signal_pending(void)
 156 {
 157         return signal_pending(current);
 158 }
 159
 160 void
 161 cfs_clear_sigpending(void)
 162 {
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&current->sighand->siglock, flags);
 166         clear_tsk_thread_flag(current, TIF_SIGPENDING);
 167         spin_unlock_irqrestore(&current->sighand->siglock, flags);
 168 }
 169
 170 EXPORT_SYMBOL(cfs_enter_debugger);
 171 EXPORT_SYMBOL(cfs_block_allsigs);
 172 EXPORT_SYMBOL(cfs_block_sigs);
 173 EXPORT_SYMBOL(cfs_block_sigsinv);
 174 EXPORT_SYMBOL(cfs_restore_sigs);
 175 EXPORT_SYMBOL(cfs_signal_pending);
 176 EXPORT_SYMBOL(cfs_clear_sigpending);