module/splat/splat-internal.h

   1 /*
   2  *  This file is part of the SPL: Solaris Porting Layer.
   3  *
   4  *  Copyright (c) 2008 Lawrence Livermore National Security, LLC.
   5  *  Produced at Lawrence Livermore National Laboratory
   6  *  Written by:
   7  *          Brian Behlendorf <behlendorf1@llnl.gov>,
   8  *          Herb Wartens <wartens2@llnl.gov>,
   9  *          Jim Garlick <garlick@llnl.gov>
  10  *  UCRL-CODE-235197
  11  *
  12  *  This is free software; you can redistribute it and/or modify it
  13  *  under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This is distributed in the hope that it will be useful, but WITHOUT
  18  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  19  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  *  for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License along
  23  *  with this program; if not, write to the Free Software Foundation, Inc.,
  24  *  51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  25  */
  26
  27 #ifndef _SPLAT_INTERNAL_H
  28 #define _SPLAT_INTERNAL_H
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/string.h>
  33 #include <linux/errno.h>
  34 #include <linux/slab.h>
  35 #include <linux/sched.h>
  36 #include <linux/elf.h>
  37 #include <linux/limits.h>
  38 #include <linux/version.h>
  39 #include <linux/vmalloc.h>
  40 #include <linux/module.h>
  41 #include <linux/device.h>
  42 #include <linux/list.h>
  43
  44 #include <asm/ioctls.h>
  45 #include <asm/uaccess.h>
  46 #include <stdarg.h>
  47
  48 #include <sys/callb.h>
  49 #include <sys/condvar.h>
  50 #include <sys/cred.h>
  51 #include <sys/sysmacros.h>
  52 #include <sys/kmem.h>
  53 #include <sys/kstat.h>
  54 #include <sys/mutex.h>
  55 #include <sys/random.h>
  56 #include <sys/rwlock.h>
  57 #include <sys/taskq.h>
  58 #include <sys/thread.h>
  59 #include <sys/time.h>
  60 #include <sys/timer.h>
  61 #include <sys/types.h>
  62 #include <sys/kobj.h>
  63 #include <sys/atomic.h>
  64 #include <sys/list.h>
  65 #include <sys/sunddi.h>
  66 #include <linux/cdev.h>
  67
  68 #include "spl-device.h"
  69 #include "splat-ctl.h"
  70
  71 #define SPLAT_SUBSYSTEM_INIT(type)                                      \
  72 ({      splat_subsystem_t *_sub_;                                       \
  73                                                                         \
  74         _sub_ = (splat_subsystem_t *)splat_##type##_init();             \
  75         if (_sub_ == NULL) {                                            \
  76                 printk(KERN_ERR "splat: Error initializing: " #type "\n"); \
  77         } else {                                                        \
  78                 spin_lock(&splat_module_lock);                          \
  79                 list_add_tail(&(_sub_->subsystem_list),                 \
  80                               &splat_module_list);                      \
  81                 spin_unlock(&splat_module_lock);                        \
  82         }                                                               \
  83 })
  84
  85 #define SPLAT_SUBSYSTEM_FINI(type)                                      \
  86 ({      splat_subsystem_t *_sub_, *_tmp_;                               \
  87         int _id_, _flag_ = 0;                                           \
  88                                                                         \
  89         _id_ = splat_##type##_id();                                     \
  90         spin_lock(&splat_module_lock);                                  \
  91         list_for_each_entry_safe(_sub_, _tmp_,  &splat_module_list,     \
  92                                  subsystem_list) {                      \
  93                 if (_sub_->desc.id == _id_) {                           \
  94                         list_del_init(&(_sub_->subsystem_list));        \
  95                         spin_unlock(&splat_module_lock);                \
  96                         splat_##type##_fini(_sub_);                     \
  97                         spin_lock(&splat_module_lock);                  \
  98                         _flag_ = 1;                                     \
  99                 }                                                       \
 100         }                                                               \
 101         spin_unlock(&splat_module_lock);                                \
 102                                                                         \
 103         if (!_flag_)                                                    \
 104                 printk(KERN_ERR "splat: Error finalizing: " #type "\n"); \
 105 })
 106
 107 #define SPLAT_TEST_INIT(sub, n, d, tid, func)                           \
 108 ({      splat_test_t *_test_;                                           \
 109                                                                         \
 110         _test_ = (splat_test_t *)kmalloc(sizeof(*_test_), GFP_KERNEL);  \
 111         if (_test_ == NULL) {                                           \
 112                 printk(KERN_ERR "splat: Error initializing: " n "/" #tid" \n");\
 113         } else {                                                        \
 114                 memset(_test_, 0, sizeof(*_test_));                     \
 115                 strncpy(_test_->desc.name, n, SPLAT_NAME_SIZE-1);       \
 116                 strncpy(_test_->desc.desc, d, SPLAT_DESC_SIZE-1);       \
 117                 _test_->desc.id = tid;                                  \
 118                 _test_->test = func;                                    \
 119                 INIT_LIST_HEAD(&(_test_->test_list));                   \
 120                 spin_lock(&((sub)->test_lock));                         \
 121                 list_add_tail(&(_test_->test_list),&((sub)->test_list));\
 122                 spin_unlock(&((sub)->test_lock));                       \
 123         }                                                               \
 124 })
 125
 126 #define SPLAT_TEST_FINI(sub, tid)                                       \
 127 ({      splat_test_t *_test_, *_tmp_;                                   \
 128         int _flag_ = 0;                                                 \
 129                                                                         \
 130         spin_lock(&((sub)->test_lock));                                 \
 131         list_for_each_entry_safe(_test_, _tmp_,                         \
 132                                  &((sub)->test_list), test_list) {      \
 133                 if (_test_->desc.id == tid) {                           \
 134                         list_del_init(&(_test_->test_list));            \
 135                         _flag_ = 1;                                     \
 136                 }                                                       \
 137         }                                                               \
 138         spin_unlock(&((sub)->test_lock));                               \
 139                                                                         \
 140         if (!_flag_)                                                    \
 141                 printk(KERN_ERR "splat: Error finalizing: " #tid "\n"); \
 142 })
 143
 144 typedef int (*splat_test_func_t)(struct file *, void *);
 145
 146 typedef struct splat_test {
 147         struct list_head test_list;
 148         splat_user_t desc;
 149         splat_test_func_t test;
 150 } splat_test_t;
 151
 152 typedef struct splat_subsystem {
 153         struct list_head subsystem_list;/* List had to chain entries */
 154         splat_user_t desc;
 155         spinlock_t test_lock;
 156         struct list_head test_list;
 157 } splat_subsystem_t;
 158
 159 #define SPLAT_INFO_BUFFER_SIZE          65536
 160 #define SPLAT_INFO_BUFFER_REDZONE       256
 161
 162 typedef struct splat_info {
 163         spinlock_t info_lock;
 164         int info_size;
 165         char *info_buffer;
 166         char *info_head;        /* Internal kernel use only */
 167 } splat_info_t;
 168
 169 #define sym2str(sym)                    (char *)(#sym)
 170
 171 #define splat_print(file, format, args...)                              \
 172 ({      splat_info_t *_info_ = (splat_info_t *)file->private_data;      \
 173         int _rc_;                                                       \
 174                                                                         \
 175         ASSERT(_info_);                                                 \
 176         ASSERT(_info_->info_buffer);                                    \
 177                                                                         \
 178         spin_lock(&_info_->info_lock);                                  \
 179                                                                         \
 180         /* Don't allow the kernel to start a write in the red zone */   \
 181         if ((int)(_info_->info_head - _info_->info_buffer) >            \
 182             (SPLAT_INFO_BUFFER_SIZE - SPLAT_INFO_BUFFER_REDZONE)) {     \
 183                 _rc_ = -EOVERFLOW;                                      \
 184         } else {                                                        \
 185                 _rc_ = sprintf(_info_->info_head, format, args);        \
 186                 if (_rc_ >= 0)                                          \
 187                         _info_->info_head += _rc_;                      \
 188         }                                                               \
 189                                                                         \
 190         spin_unlock(&_info_->info_lock);                                \
 191         _rc_;                                                           \
 192 })
 193
 194 #define splat_vprint(file, test, format, args...)                       \
 195         splat_print(file, "%*s: " format, SPLAT_NAME_SIZE, test, args)
 196
 197 splat_subsystem_t *splat_condvar_init(void);
 198 splat_subsystem_t *splat_kmem_init(void);
 199 splat_subsystem_t *splat_mutex_init(void);
 200 splat_subsystem_t *splat_krng_init(void);
 201 splat_subsystem_t *splat_rwlock_init(void);
 202 splat_subsystem_t *splat_taskq_init(void);
 203 splat_subsystem_t *splat_thread_init(void);
 204 splat_subsystem_t *splat_time_init(void);
 205 splat_subsystem_t *splat_vnode_init(void);
 206 splat_subsystem_t *splat_kobj_init(void);
 207 splat_subsystem_t *splat_atomic_init(void);
 208 splat_subsystem_t *splat_list_init(void);
 209 splat_subsystem_t *splat_generic_init(void);
 210
 211 void splat_condvar_fini(splat_subsystem_t *);
 212 void splat_kmem_fini(splat_subsystem_t *);
 213 void splat_mutex_fini(splat_subsystem_t *);
 214 void splat_krng_fini(splat_subsystem_t *);
 215 void splat_rwlock_fini(splat_subsystem_t *);
 216 void splat_taskq_fini(splat_subsystem_t *);
 217 void splat_thread_fini(splat_subsystem_t *);
 218 void splat_time_fini(splat_subsystem_t *);
 219 void splat_vnode_fini(splat_subsystem_t *);
 220 void splat_kobj_fini(splat_subsystem_t *);
 221 void splat_atomic_fini(splat_subsystem_t *);
 222 void splat_list_fini(splat_subsystem_t *);
 223 void splat_generic_fini(splat_subsystem_t *);
 224
 225 int splat_condvar_id(void);
 226 int splat_kmem_id(void);
 227 int splat_mutex_id(void);
 228 int splat_krng_id(void);
 229 int splat_rwlock_id(void);
 230 int splat_taskq_id(void);
 231 int splat_thread_id(void);
 232 int splat_time_id(void);
 233 int splat_vnode_id(void);
 234 int splat_kobj_id(void);
 235 int splat_atomic_id(void);
 236 int splat_list_id(void);
 237 int splat_generic_id(void);
 238
 239 #endif /* _SPLAT_INTERNAL_H */