libcfs/libcfs/linux/linux-prim.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 #ifndef AUTOCONF_INCLUDED
  39 #include <linux/config.h>
  40 #endif
  41 #include <linux/module.h>
  42 #include <linux/kernel.h>
  43 #include <linux/sched.h>
  44
  45 #include <libcfs/libcfs.h>
  46
  47 #if defined(CONFIG_KGDB)
  48 #include <asm/kgdb.h>
  49 #endif
  50
  51 #define LINUX_WAITQ(w) ((wait_queue_t *) w)
  52 #define LINUX_WAITQ_HEAD(w) ((wait_queue_head_t *) w)
  53
  54 void
  55 cfs_waitq_init(cfs_waitq_t *waitq)
  56 {
  57         init_waitqueue_head(LINUX_WAITQ_HEAD(waitq));
  58 }
  59 EXPORT_SYMBOL(cfs_waitq_init);
  60
  61 void
  62 cfs_waitlink_init(cfs_waitlink_t *link)
  63 {
  64         init_waitqueue_entry(LINUX_WAITQ(link), current);
  65 }
  66 EXPORT_SYMBOL(cfs_waitlink_init);
  67
  68 void
  69 cfs_waitq_add(cfs_waitq_t *waitq, cfs_waitlink_t *link)
  70 {
  71         add_wait_queue(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
  72 }
  73 EXPORT_SYMBOL(cfs_waitq_add);
  74
  75 void
  76 cfs_waitq_add_exclusive(cfs_waitq_t *waitq,
  77                         cfs_waitlink_t *link)
  78 {
  79         add_wait_queue_exclusive(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
  80 }
  81 EXPORT_SYMBOL(cfs_waitq_add_exclusive);
  82
  83 void
  84 cfs_waitq_del(cfs_waitq_t *waitq, cfs_waitlink_t *link)
  85 {
  86         remove_wait_queue(LINUX_WAITQ_HEAD(waitq), LINUX_WAITQ(link));
  87 }
  88 EXPORT_SYMBOL(cfs_waitq_del);
  89
  90 int
  91 cfs_waitq_active(cfs_waitq_t *waitq)
  92 {
  93         return waitqueue_active(LINUX_WAITQ_HEAD(waitq));
  94 }
  95 EXPORT_SYMBOL(cfs_waitq_active);
  96
  97 void
  98 cfs_waitq_signal(cfs_waitq_t *waitq)
  99 {
 100         wake_up(LINUX_WAITQ_HEAD(waitq));
 101 }
 102 EXPORT_SYMBOL(cfs_waitq_signal);
 103
 104 void
 105 cfs_waitq_signal_nr(cfs_waitq_t *waitq, int nr)
 106 {
 107         wake_up_nr(LINUX_WAITQ_HEAD(waitq), nr);
 108 }
 109 EXPORT_SYMBOL(cfs_waitq_signal_nr);
 110
 111 void
 112 cfs_waitq_broadcast(cfs_waitq_t *waitq)
 113 {
 114         wake_up_all(LINUX_WAITQ_HEAD(waitq));
 115 }
 116 EXPORT_SYMBOL(cfs_waitq_broadcast);
 117
 118 void
 119 cfs_waitq_wait(cfs_waitlink_t *link, cfs_task_state_t state)
 120 {
 121         schedule();
 122 }
 123 EXPORT_SYMBOL(cfs_waitq_wait);
 124
 125 int64_t
 126 cfs_waitq_timedwait(cfs_waitlink_t *link, cfs_task_state_t state,
 127                     int64_t timeout)
 128 {
 129         return schedule_timeout(timeout);
 130 }
 131 EXPORT_SYMBOL(cfs_waitq_timedwait);
 132
 133 void
 134 cfs_schedule_timeout_and_set_state(cfs_task_state_t state, int64_t timeout)
 135 {
 136         set_current_state(state);
 137         schedule_timeout(timeout);
 138 }
 139 EXPORT_SYMBOL(cfs_schedule_timeout_and_set_state);
 140
 141 void
 142 cfs_schedule_timeout(int64_t timeout)
 143 {
 144         schedule_timeout(timeout);
 145 }
 146 EXPORT_SYMBOL(cfs_schedule_timeout);
 147
 148 void
 149 cfs_schedule(void)
 150 {
 151         schedule();
 152 }
 153 EXPORT_SYMBOL(cfs_schedule);
 154
 155 /* deschedule for a bit... */
 156 void
 157 cfs_pause(cfs_duration_t ticks)
 158 {
 159         set_current_state(TASK_UNINTERRUPTIBLE);
 160         schedule_timeout(ticks);
 161 }
 162 EXPORT_SYMBOL(cfs_pause);
 163
 164 int cfs_need_resched(void)
 165 {
 166         return need_resched();
 167 }
 168 EXPORT_SYMBOL(cfs_need_resched);
 169
 170 void cfs_cond_resched(void)
 171 {
 172         cond_resched();
 173 }
 174 EXPORT_SYMBOL(cfs_cond_resched);
 175
 176 void cfs_init_timer(cfs_timer_t *t)
 177 {
 178         init_timer(t);
 179 }
 180 EXPORT_SYMBOL(cfs_init_timer);
 181
 182 void cfs_timer_init(cfs_timer_t *t, cfs_timer_func_t *func, void *arg)
 183 {
 184         init_timer(t);
 185         t->function = func;
 186         t->data = (unsigned long)arg;
 187 }
 188 EXPORT_SYMBOL(cfs_timer_init);
 189
 190 void cfs_timer_done(cfs_timer_t *t)
 191 {
 192         return;
 193 }
 194 EXPORT_SYMBOL(cfs_timer_done);
 195
 196 void cfs_timer_arm(cfs_timer_t *t, cfs_time_t deadline)
 197 {
 198         mod_timer(t, deadline);
 199 }
 200 EXPORT_SYMBOL(cfs_timer_arm);
 201
 202 void cfs_timer_disarm(cfs_timer_t *t)
 203 {
 204         del_timer(t);
 205 }
 206 EXPORT_SYMBOL(cfs_timer_disarm);
 207
 208 int  cfs_timer_is_armed(cfs_timer_t *t)
 209 {
 210         return timer_pending(t);
 211 }
 212 EXPORT_SYMBOL(cfs_timer_is_armed);
 213
 214 cfs_time_t cfs_timer_deadline(cfs_timer_t *t)
 215 {
 216         return t->expires;
 217 }
 218 EXPORT_SYMBOL(cfs_timer_deadline);
 219
 220 void cfs_enter_debugger(void)
 221 {
 222 #if defined(CONFIG_KGDB)
 223 //        BREAKPOINT();
 224 #elif defined(__arch_um__)
 225         asm("int $3");
 226 #else
 227         /* nothing */
 228 #endif
 229 }
 230
 231 void cfs_daemonize(char *str) {
 232         unsigned long flags;
 233
 234         lock_kernel();
 235         daemonize(str);
 236         SIGNAL_MASK_LOCK(current, flags);
 237         sigfillset(&current->blocked);
 238         RECALC_SIGPENDING;
 239         SIGNAL_MASK_UNLOCK(current, flags);
 240         unlock_kernel();
 241 }
 242
 243 int cfs_daemonize_ctxt(char *str) {
 244         struct task_struct *tsk = current;
 245         struct fs_struct *fs = NULL;
 246
 247         cfs_daemonize(str);
 248         fs = copy_fs_struct(tsk->fs);
 249         if (fs == NULL)
 250                 return -ENOMEM;
 251         exit_fs(tsk);
 252         tsk->fs = fs;
 253         return 0;
 254 }
 255
 256
 257 sigset_t
 258 cfs_get_blockedsigs(void)
 259 {
 260         unsigned long          flags;
 261         sigset_t        old;
 262
 263         SIGNAL_MASK_LOCK(current, flags);
 264         old = current->blocked;
 265         SIGNAL_MASK_UNLOCK(current, flags);
 266         return old;
 267 }
 268
 269 sigset_t
 270 cfs_block_allsigs(void)
 271 {
 272         unsigned long          flags;
 273         sigset_t        old;
 274
 275         SIGNAL_MASK_LOCK(current, flags);
 276         old = current->blocked;
 277         sigfillset(&current->blocked);
 278         RECALC_SIGPENDING;
 279         SIGNAL_MASK_UNLOCK(current, flags);
 280
 281         return old;
 282 }
 283
 284 sigset_t
 285 cfs_block_sigs(sigset_t bits)
 286 {
 287         unsigned long  flags;
 288         sigset_t        old;
 289
 290         SIGNAL_MASK_LOCK(current, flags);
 291         old = current->blocked;
 292         current->blocked = bits;
 293         RECALC_SIGPENDING;
 294         SIGNAL_MASK_UNLOCK(current, flags);
 295         return old;
 296 }
 297
 298 void
 299 cfs_restore_sigs (cfs_sigset_t old)
 300 {
 301         unsigned long  flags;
 302
 303         SIGNAL_MASK_LOCK(current, flags);
 304         current->blocked = old;
 305         RECALC_SIGPENDING;
 306         SIGNAL_MASK_UNLOCK(current, flags);
 307 }
 308
 309 int
 310 cfs_signal_pending(void)
 311 {
 312         return signal_pending(current);
 313 }
 314
 315 void
 316 cfs_clear_sigpending(void)
 317 {
 318         unsigned long flags;
 319
 320         SIGNAL_MASK_LOCK(current, flags);
 321         CLEAR_SIGPENDING;
 322         SIGNAL_MASK_UNLOCK(current, flags);
 323 }
 324
 325 int
 326 libcfs_arch_init(void)
 327 {
 328         return 0;
 329 }
 330
 331 void
 332 libcfs_arch_cleanup(void)
 333 {
 334         return;
 335 }
 336
 337 EXPORT_SYMBOL(libcfs_arch_init);
 338 EXPORT_SYMBOL(libcfs_arch_cleanup);
 339 EXPORT_SYMBOL(cfs_enter_debugger);
 340 EXPORT_SYMBOL(cfs_daemonize);
 341 EXPORT_SYMBOL(cfs_daemonize_ctxt);
 342 EXPORT_SYMBOL(cfs_block_allsigs);
 343 EXPORT_SYMBOL(cfs_block_sigs);
 344 EXPORT_SYMBOL(cfs_get_blockedsigs);
 345 EXPORT_SYMBOL(cfs_restore_sigs);
 346 EXPORT_SYMBOL(cfs_signal_pending);
 347 EXPORT_SYMBOL(cfs_clear_sigpending);