lnet/include/libcfs/linux/linux-prim.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * Basic library routines.
  22  *
  23  */
  24
  25 #ifndef __LIBCFS_LINUX_CFS_PRIM_H__
  26 #define __LIBCFS_LINUX_CFS_PRIM_H__
  27
  28 #ifndef __LIBCFS_LIBCFS_H__
  29 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
  30 #endif
  31
  32 #ifdef __KERNEL__
  33 #ifdef HAVE_KERNEL_CONFIG_H
  34 #include <linux/config.h>
  35 #endif
  36 #include <linux/module.h>
  37 #include <linux/kernel.h>
  38 #include <linux/version.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/mm.h>
  41 #include <linux/timer.h>
  42
  43 #include <linux/miscdevice.h>
  44 #include <libcfs/linux/portals_compat25.h>
  45 #include <asm/div64.h>
  46
  47 #include <libcfs/linux/linux-time.h>
  48
  49 /*
  50  * Pseudo device register
  51  */
  52 typedef struct miscdevice               cfs_psdev_t;
  53 #define cfs_psdev_register(dev)         misc_register(dev)
  54 #define cfs_psdev_deregister(dev)       misc_deregister(dev)
  55
  56 /*
  57  * Sysctl register
  58  */
  59 typedef struct ctl_table                cfs_sysctl_table_t;
  60 typedef struct ctl_table_header         cfs_sysctl_table_header_t;
  61
  62 #define cfs_register_sysctl_table(t, a) register_sysctl_table(t, a)
  63 #define cfs_unregister_sysctl_table(t)  unregister_sysctl_table(t, a)
  64
  65 /*
  66  * Symbol register
  67  */
  68 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  69 #define cfs_symbol_register(s, p)       inter_module_register(s, THIS_MODULE, p)
  70 #define cfs_symbol_unregister(s)        inter_module_unregister(s)
  71 #define cfs_symbol_get(s)               inter_module_get(s)
  72 #define cfs_symbol_put(s)               inter_module_put(s)
  73 #define cfs_module_get()                MOD_INC_USE_COUNT
  74 #define cfs_module_put()                MOD_DEC_USE_COUNT
  75 #else
  76 #define cfs_symbol_register(s, p)       do {} while(0)
  77 #define cfs_symbol_unregister(s)        do {} while(0)
  78 #define cfs_symbol_get(s)               symbol_get(s)
  79 #define cfs_symbol_put(s)               symbol_put(s)
  80 #define cfs_module_get()                try_module_get(THIS_MODULE)
  81 #define cfs_module_put()                module_put(THIS_MODULE)
  82 #endif
  83
  84 /*
  85  * Proc file system APIs
  86  */
  87 typedef read_proc_t                     cfs_read_proc_t;
  88 typedef write_proc_t                    cfs_write_proc_t;
  89 typedef struct proc_dir_entry           cfs_proc_dir_entry_t;
  90 #define cfs_create_proc_entry(n, m, p)  create_proc_entry(n, m, p)
  91 #define cfs_free_proc_entry(e)          free_proc_entry(e)
  92 #define cfs_remove_proc_entry(n, e)     remove_proc_entry(n, e)
  93
  94 /*
  95  * Wait Queue
  96  */
  97 #define CFS_TASK_INTERRUPTIBLE          TASK_INTERRUPTIBLE
  98 #define CFS_TASK_UNINT                  TASK_UNINTERRUPTIBLE
  99
 100 typedef wait_queue_t                    cfs_waitlink_t;
 101 typedef wait_queue_head_t               cfs_waitq_t;
 102
 103 typedef long                            cfs_task_state_t;
 104
 105 #define cfs_waitq_init(w)               init_waitqueue_head(w)
 106 #define cfs_waitlink_init(l)            init_waitqueue_entry(l, current)
 107 #define cfs_waitq_add(w, l)             add_wait_queue(w, l)
 108 #define cfs_waitq_add_exclusive(w, l)   add_wait_queue_exclusive(w, l)
 109 #define cfs_waitq_forward(l, w)         do {} while(0)
 110 #define cfs_waitq_del(w, l)             remove_wait_queue(w, l)
 111 #define cfs_waitq_active(w)             waitqueue_active(w)
 112 #define cfs_waitq_signal(w)             wake_up(w)
 113 #define cfs_waitq_signal_nr(w,n)        wake_up_nr(w, n)
 114 #define cfs_waitq_broadcast(w)          wake_up_all(w)
 115 #define cfs_waitq_wait(l, s)            schedule()
 116 #define cfs_waitq_timedwait(l, s, t)    schedule_timeout(t)
 117 #define cfs_schedule_timeout(s, t)      schedule_timeout(t)
 118 #define cfs_schedule()                  schedule()
 119
 120 /* Kernel thread */
 121 typedef int (*cfs_thread_t)(void *);
 122 #define cfs_kernel_thread(func, a, f)   kernel_thread(func, a, f)
 123
 124 /*
 125  * Task struct
 126  */
 127 typedef struct task_struct              cfs_task_t;
 128 #define cfs_current()                   current
 129 #define cfs_task_lock(t)                task_lock(t)
 130 #define cfs_task_unlock(t)              task_unlock(t)
 131 #define CFS_DECL_JOURNAL_DATA           void *journal_info
 132 #define CFS_PUSH_JOURNAL                do {    \
 133         journal_info = current->journal_info;   \
 134         current->journal_info = NULL;           \
 135         } while(0)
 136 #define CFS_POP_JOURNAL                 do {    \
 137         current->journal_info = journal_info;   \
 138         } while(0)
 139
 140 /* Module interfaces */
 141 #define cfs_module(name, version, init, fini) \
 142 module_init(init);                            \
 143 module_exit(fini)
 144
 145 /*
 146  * Signal
 147  */
 148 typedef sigset_t                        cfs_sigset_t;
 149
 150 /*
 151  * Timer
 152  */
 153 typedef struct timer_list cfs_timer_t;
 154 typedef  void (*timer_func_t)(unsigned long);
 155
 156 #define cfs_init_timer(t)       init_timer(t)
 157
 158 static inline void cfs_timer_init(cfs_timer_t *t, void (*func)(unsigned long), void *arg)
 159 {
 160         init_timer(t);
 161         t->function = (timer_func_t)func;
 162         t->data = (unsigned long)arg;
 163 }
 164
 165 static inline void cfs_timer_done(cfs_timer_t *t)
 166 {
 167         return;
 168 }
 169
 170 static inline void cfs_timer_arm(cfs_timer_t *t, cfs_time_t deadline)
 171 {
 172         mod_timer(t, deadline);
 173 }
 174
 175 static inline void cfs_timer_disarm(cfs_timer_t *t)
 176 {
 177         del_timer(t);
 178 }
 179
 180 static inline int  cfs_timer_is_armed(cfs_timer_t *t)
 181 {
 182         return timer_pending(t);
 183 }
 184
 185 static inline cfs_time_t cfs_timer_deadline(cfs_timer_t *t)
 186 {
 187         return t->expires;
 188 }
 189
 190
 191 /* deschedule for a bit... */
 192 static inline void cfs_pause(cfs_duration_t ticks)
 193 {
 194         set_current_state(TASK_UNINTERRUPTIBLE);
 195         schedule_timeout(ticks);
 196 }
 197
 198 #else   /* !__KERNEL__ */
 199
 200 typedef struct proc_dir_entry           cfs_proc_dir_entry_t;
 201 #include "../user-prim.h"
 202
 203 #endif /* __KERNEL__ */
 204
 205 #endif