fs/ubifs/debug.h

   1 /*
   2  * This file is part of UBIFS.
   3  *
   4  * Copyright (C) 2006-2008 Nokia Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  *
  19  * Authors: Artem Bityutskiy (Битюцкий Артём)
  20  *          Adrian Hunter
  21  */
  22
  23 #ifndef __UBIFS_DEBUG_H__
  24 #define __UBIFS_DEBUG_H__
  25
  26 /* Checking helper functions */
  27 typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
  28                                  struct ubifs_zbranch *zbr, void *priv);
  29 typedef int (*dbg_znode_callback)(struct ubifs_info *c,
  30                                   struct ubifs_znode *znode, void *priv);
  31
  32 #ifdef CONFIG_UBIFS_FS_DEBUG
  33
  34 #include <linux/random.h>
  35
  36 /*
  37  * The UBIFS debugfs directory name pattern and maximum name length (3 for "ubi"
  38  * + 1 for "_" and plus 2x2 for 2 UBI numbers and 1 for the trailing zero byte.
  39  */
  40 #define UBIFS_DFS_DIR_NAME "ubi%d_%d"
  41 #define UBIFS_DFS_DIR_LEN  (3 + 1 + 2*2 + 1)
  42
  43 /**
  44  * ubifs_debug_info - per-FS debugging information.
  45  * @old_zroot: old index root - used by 'dbg_check_old_index()'
  46  * @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
  47  * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
  48  * @failure_mode: failure mode for recovery testing
  49  * @fail_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls
  50  * @fail_timeout: time in jiffies when delay of failure mode expires
  51  * @fail_cnt: current number of calls to failure mode I/O functions
  52  * @fail_cnt_max: number of calls by which to delay failure mode
  53  * @chk_lpt_sz: used by LPT tree size checker
  54  * @chk_lpt_sz2: used by LPT tree size checker
  55  * @chk_lpt_wastage: used by LPT tree size checker
  56  * @chk_lpt_lebs: used by LPT tree size checker
  57  * @new_nhead_offs: used by LPT tree size checker
  58  * @new_ihead_lnum: used by debugging to check @c->ihead_lnum
  59  * @new_ihead_offs: used by debugging to check @c->ihead_offs
  60  *
  61  * @saved_lst: saved lprops statistics (used by 'dbg_save_space_info()')
  62  * @saved_bi: saved budgeting information
  63  * @saved_free: saved amount of free space
  64  * @saved_idx_gc_cnt: saved value of @c->idx_gc_cnt
  65  *
  66  * @dfs_dir_name: name of debugfs directory containing this file-system's files
  67  * @dfs_dir: direntry object of the file-system debugfs directory
  68  * @dfs_dump_lprops: "dump lprops" debugfs knob
  69  * @dfs_dump_budg: "dump budgeting information" debugfs knob
  70  * @dfs_dump_tnc: "dump TNC" debugfs knob
  71  */
  72 struct ubifs_debug_info {
  73         struct ubifs_zbranch old_zroot;
  74         int old_zroot_level;
  75         unsigned long long old_zroot_sqnum;
  76         int failure_mode;
  77         int fail_delay;
  78         unsigned long fail_timeout;
  79         unsigned int fail_cnt;
  80         unsigned int fail_cnt_max;
  81         long long chk_lpt_sz;
  82         long long chk_lpt_sz2;
  83         long long chk_lpt_wastage;
  84         int chk_lpt_lebs;
  85         int new_nhead_offs;
  86         int new_ihead_lnum;
  87         int new_ihead_offs;
  88
  89         struct ubifs_lp_stats saved_lst;
  90         struct ubifs_budg_info saved_bi;
  91         long long saved_free;
  92         int saved_idx_gc_cnt;
  93
  94         char dfs_dir_name[UBIFS_DFS_DIR_LEN + 1];
  95         struct dentry *dfs_dir;
  96         struct dentry *dfs_dump_lprops;
  97         struct dentry *dfs_dump_budg;
  98         struct dentry *dfs_dump_tnc;
  99 };
 100
 101 #define ubifs_assert(expr) do {                                                \
 102         if (unlikely(!(expr))) {                                               \
 103                 printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
 104                        __func__, __LINE__, current->pid);                      \
 105                 dbg_dump_stack();                                              \
 106         }                                                                      \
 107 } while (0)
 108
 109 #define ubifs_assert_cmt_locked(c) do {                                        \
 110         if (unlikely(down_write_trylock(&(c)->commit_sem))) {                  \
 111                 up_write(&(c)->commit_sem);                                    \
 112                 printk(KERN_CRIT "commit lock is not locked!\n");              \
 113                 ubifs_assert(0);                                               \
 114         }                                                                      \
 115 } while (0)
 116
 117 #define dbg_dump_stack() dump_stack()
 118
 119 #define dbg_err(fmt, ...) do {                                                 \
 120         spin_lock(&dbg_lock);                                                  \
 121         ubifs_err(fmt, ##__VA_ARGS__);                                         \
 122         spin_unlock(&dbg_lock);                                                \
 123 } while (0)
 124
 125 const char *dbg_key_str0(const struct ubifs_info *c,
 126                          const union ubifs_key *key);
 127 const char *dbg_key_str1(const struct ubifs_info *c,
 128                          const union ubifs_key *key);
 129
 130 /*
 131  * DBGKEY macros require @dbg_lock to be held, which it is in the dbg message
 132  * macros.
 133  */
 134 #define DBGKEY(key) dbg_key_str0(c, (key))
 135 #define DBGKEY1(key) dbg_key_str1(c, (key))
 136
 137 #define ubifs_dbg_msg(type, fmt, ...) do {                        \
 138         spin_lock(&dbg_lock);                                     \
 139         pr_debug("UBIFS DBG " type ": " fmt "\n", ##__VA_ARGS__); \
 140         spin_unlock(&dbg_lock);                                   \
 141 } while (0)
 142
 143 /* Just a debugging messages not related to any specific UBIFS subsystem */
 144 #define dbg_msg(fmt, ...)   ubifs_dbg_msg("msg", fmt, ##__VA_ARGS__)
 145 /* General messages */
 146 #define dbg_gen(fmt, ...)   ubifs_dbg_msg("gen", fmt, ##__VA_ARGS__)
 147 /* Additional journal messages */
 148 #define dbg_jnl(fmt, ...)   ubifs_dbg_msg("jnl", fmt, ##__VA_ARGS__)
 149 /* Additional TNC messages */
 150 #define dbg_tnc(fmt, ...)   ubifs_dbg_msg("tnc", fmt, ##__VA_ARGS__)
 151 /* Additional lprops messages */
 152 #define dbg_lp(fmt, ...)    ubifs_dbg_msg("lp", fmt, ##__VA_ARGS__)
 153 /* Additional LEB find messages */
 154 #define dbg_find(fmt, ...)  ubifs_dbg_msg("find", fmt, ##__VA_ARGS__)
 155 /* Additional mount messages */
 156 #define dbg_mnt(fmt, ...)   ubifs_dbg_msg("mnt", fmt, ##__VA_ARGS__)
 157 /* Additional I/O messages */
 158 #define dbg_io(fmt, ...)    ubifs_dbg_msg("io", fmt, ##__VA_ARGS__)
 159 /* Additional commit messages */
 160 #define dbg_cmt(fmt, ...)   ubifs_dbg_msg("cmt", fmt, ##__VA_ARGS__)
 161 /* Additional budgeting messages */
 162 #define dbg_budg(fmt, ...)  ubifs_dbg_msg("budg", fmt, ##__VA_ARGS__)
 163 /* Additional log messages */
 164 #define dbg_log(fmt, ...)   ubifs_dbg_msg("log", fmt, ##__VA_ARGS__)
 165 /* Additional gc messages */
 166 #define dbg_gc(fmt, ...)    ubifs_dbg_msg("gc", fmt, ##__VA_ARGS__)
 167 /* Additional scan messages */
 168 #define dbg_scan(fmt, ...)  ubifs_dbg_msg("scan", fmt, ##__VA_ARGS__)
 169 /* Additional recovery messages */
 170 #define dbg_rcvry(fmt, ...) ubifs_dbg_msg("rcvry", fmt, ##__VA_ARGS__)
 171
 172 /*
 173  * Debugging check flags.
 174  *
 175  * UBIFS_CHK_GEN: general checks
 176  * UBIFS_CHK_TNC: check TNC
 177  * UBIFS_CHK_IDX_SZ: check index size
 178  * UBIFS_CHK_ORPH: check orphans
 179  * UBIFS_CHK_OLD_IDX: check the old index
 180  * UBIFS_CHK_LPROPS: check lprops
 181  * UBIFS_CHK_FS: check the file-system
 182  */
 183 enum {
 184         UBIFS_CHK_GEN     = 0x1,
 185         UBIFS_CHK_TNC     = 0x2,
 186         UBIFS_CHK_IDX_SZ  = 0x4,
 187         UBIFS_CHK_ORPH    = 0x8,
 188         UBIFS_CHK_OLD_IDX = 0x10,
 189         UBIFS_CHK_LPROPS  = 0x20,
 190         UBIFS_CHK_FS      = 0x40,
 191 };
 192
 193 /*
 194  * Special testing flags.
 195  *
 196  * UBIFS_TST_RCVRY: failure mode for recovery testing
 197  */
 198 enum {
 199         UBIFS_TST_RCVRY             = 0x4,
 200 };
 201
 202 extern spinlock_t dbg_lock;
 203
 204 extern unsigned int ubifs_msg_flags;
 205 extern unsigned int ubifs_chk_flags;
 206 extern unsigned int ubifs_tst_flags;
 207
 208 int ubifs_debugging_init(struct ubifs_info *c);
 209 void ubifs_debugging_exit(struct ubifs_info *c);
 210
 211 /* Dump functions */
 212 const char *dbg_ntype(int type);
 213 const char *dbg_cstate(int cmt_state);
 214 const char *dbg_jhead(int jhead);
 215 const char *dbg_get_key_dump(const struct ubifs_info *c,
 216                              const union ubifs_key *key);
 217 void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode);
 218 void dbg_dump_node(const struct ubifs_info *c, const void *node);
 219 void dbg_dump_lpt_node(const struct ubifs_info *c, void *node, int lnum,
 220                        int offs);
 221 void dbg_dump_budget_req(const struct ubifs_budget_req *req);
 222 void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
 223 void dbg_dump_budg(struct ubifs_info *c, const struct ubifs_budg_info *bi);
 224 void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
 225 void dbg_dump_lprops(struct ubifs_info *c);
 226 void dbg_dump_lpt_info(struct ubifs_info *c);
 227 void dbg_dump_leb(const struct ubifs_info *c, int lnum);
 228 void dbg_dump_znode(const struct ubifs_info *c,
 229                     const struct ubifs_znode *znode);
 230 void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat);
 231 void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
 232                     struct ubifs_nnode *parent, int iip);
 233 void dbg_dump_tnc(struct ubifs_info *c);
 234 void dbg_dump_index(struct ubifs_info *c);
 235 void dbg_dump_lpt_lebs(const struct ubifs_info *c);
 236
 237 int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
 238                    dbg_znode_callback znode_cb, void *priv);
 239
 240 /* Checking functions */
 241 void dbg_save_space_info(struct ubifs_info *c);
 242 int dbg_check_space_info(struct ubifs_info *c);
 243 int dbg_check_lprops(struct ubifs_info *c);
 244 int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
 245 int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
 246 int dbg_check_cats(struct ubifs_info *c);
 247 int dbg_check_ltab(struct ubifs_info *c);
 248 int dbg_chk_lpt_free_spc(struct ubifs_info *c);
 249 int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len);
 250 int dbg_check_synced_i_size(struct inode *inode);
 251 int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
 252 int dbg_check_tnc(struct ubifs_info *c, int extra);
 253 int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
 254 int dbg_check_filesystem(struct ubifs_info *c);
 255 void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
 256                     int add_pos);
 257 int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
 258                         int row, int col);
 259 int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode,
 260                          loff_t size);
 261 int dbg_check_data_nodes_order(struct ubifs_info *c, struct list_head *head);
 262 int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head);
 263
 264 /* Force the use of in-the-gaps method for testing */
 265 static inline int dbg_force_in_the_gaps_enabled(void)
 266 {
 267         return ubifs_chk_flags & UBIFS_CHK_GEN;
 268 }
 269 int dbg_force_in_the_gaps(void);
 270
 271 /* Failure mode for recovery testing */
 272 #define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
 273
 274 #ifndef UBIFS_DBG_PRESERVE_UBI
 275 #define ubi_leb_read   dbg_leb_read
 276 #define ubi_leb_write  dbg_leb_write
 277 #define ubi_leb_change dbg_leb_change
 278 #define ubi_leb_erase  dbg_leb_erase
 279 #define ubi_leb_unmap  dbg_leb_unmap
 280 #define ubi_is_mapped  dbg_is_mapped
 281 #define ubi_leb_map    dbg_leb_map
 282 #endif
 283
 284 int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
 285                  int len, int check);
 286 int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
 287                   int offset, int len, int dtype);
 288 int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
 289                    int len, int dtype);
 290 int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum);
 291 int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
 292 int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum);
 293 int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
 294
 295 static inline int dbg_read(struct ubi_volume_desc *desc, int lnum, char *buf,
 296                            int offset, int len)
 297 {
 298         return dbg_leb_read(desc, lnum, buf, offset, len, 0);
 299 }
 300
 301 static inline int dbg_write(struct ubi_volume_desc *desc, int lnum,
 302                             const void *buf, int offset, int len)
 303 {
 304         return dbg_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
 305 }
 306
 307 static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
 308                                     const void *buf, int len)
 309 {
 310         return dbg_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
 311 }
 312
 313 /* Debugfs-related stuff */
 314 int dbg_debugfs_init(void);
 315 void dbg_debugfs_exit(void);
 316 int dbg_debugfs_init_fs(struct ubifs_info *c);
 317 void dbg_debugfs_exit_fs(struct ubifs_info *c);
 318
 319 #else /* !CONFIG_UBIFS_FS_DEBUG */
 320
 321 /* Use "if (0)" to make compiler check arguments even if debugging is off */
 322 #define ubifs_assert(expr)  do {                                               \
 323         if (0)                                                                 \
 324                 printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
 325                        __func__, __LINE__, current->pid);                      \
 326 } while (0)
 327
 328 #define dbg_err(fmt, ...)   do {                   \
 329         if (0)                                     \
 330                 ubifs_err(fmt, ##__VA_ARGS__);     \
 331 } while (0)
 332
 333 #define ubifs_dbg_msg(fmt, ...) do {               \
 334         if (0)                                     \
 335                 pr_debug(fmt "\n", ##__VA_ARGS__); \
 336 } while (0)
 337
 338 #define dbg_dump_stack()
 339 #define ubifs_assert_cmt_locked(c)
 340
 341 #define dbg_msg(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 342 #define dbg_gen(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 343 #define dbg_jnl(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 344 #define dbg_tnc(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 345 #define dbg_lp(fmt, ...)    ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 346 #define dbg_find(fmt, ...)  ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 347 #define dbg_mnt(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 348 #define dbg_io(fmt, ...)    ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 349 #define dbg_cmt(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 350 #define dbg_budg(fmt, ...)  ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 351 #define dbg_log(fmt, ...)   ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 352 #define dbg_gc(fmt, ...)    ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 353 #define dbg_scan(fmt, ...)  ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 354 #define dbg_rcvry(fmt, ...) ubifs_dbg_msg(fmt, ##__VA_ARGS__)
 355
 356 #define DBGKEY(key)  ((char *)(key))
 357 #define DBGKEY1(key) ((char *)(key))
 358
 359 static inline int ubifs_debugging_init(struct ubifs_info *c)      { return 0; }
 360 static inline void ubifs_debugging_exit(struct ubifs_info *c)     { return; }
 361 static inline const char *dbg_ntype(int type)                     { return ""; }
 362 static inline const char *dbg_cstate(int cmt_state)               { return ""; }
 363 static inline const char *dbg_jhead(int jhead)                    { return ""; }
 364 static inline const char *
 365 dbg_get_key_dump(const struct ubifs_info *c,
 366                  const union ubifs_key *key)                      { return ""; }
 367 static inline void dbg_dump_inode(const struct ubifs_info *c,
 368                                   const struct inode *inode)      { return; }
 369 static inline void dbg_dump_node(const struct ubifs_info *c,
 370                                  const void *node)                { return; }
 371 static inline void dbg_dump_lpt_node(const struct ubifs_info *c,
 372                                      void *node, int lnum,
 373                                      int offs)                    { return; }
 374 static inline void
 375 dbg_dump_budget_req(const struct ubifs_budget_req *req)           { return; }
 376 static inline void
 377 dbg_dump_lstats(const struct ubifs_lp_stats *lst)                 { return; }
 378 static inline void
 379 dbg_dump_budg(struct ubifs_info *c,
 380               const struct ubifs_budg_info *bi)                   { return; }
 381 static inline void dbg_dump_lprop(const struct ubifs_info *c,
 382                                   const struct ubifs_lprops *lp)  { return; }
 383 static inline void dbg_dump_lprops(struct ubifs_info *c)          { return; }
 384 static inline void dbg_dump_lpt_info(struct ubifs_info *c)        { return; }
 385 static inline void dbg_dump_leb(const struct ubifs_info *c,
 386                                 int lnum)                         { return; }
 387 static inline void
 388 dbg_dump_znode(const struct ubifs_info *c,
 389                const struct ubifs_znode *znode)                   { return; }
 390 static inline void dbg_dump_heap(struct ubifs_info *c,
 391                                  struct ubifs_lpt_heap *heap,
 392                                  int cat)                         { return; }
 393 static inline void dbg_dump_pnode(struct ubifs_info *c,
 394                                   struct ubifs_pnode *pnode,
 395                                   struct ubifs_nnode *parent,
 396                                   int iip)                        { return; }
 397 static inline void dbg_dump_tnc(struct ubifs_info *c)             { return; }
 398 static inline void dbg_dump_index(struct ubifs_info *c)           { return; }
 399 static inline void dbg_dump_lpt_lebs(const struct ubifs_info *c)  { return; }
 400
 401 static inline int dbg_walk_index(struct ubifs_info *c,
 402                                  dbg_leaf_callback leaf_cb,
 403                                  dbg_znode_callback znode_cb,
 404                                  void *priv)                      { return 0; }
 405 static inline void dbg_save_space_info(struct ubifs_info *c)      { return; }
 406 static inline int dbg_check_space_info(struct ubifs_info *c)      { return 0; }
 407 static inline int dbg_check_lprops(struct ubifs_info *c)          { return 0; }
 408 static inline int
 409 dbg_old_index_check_init(struct ubifs_info *c,
 410                          struct ubifs_zbranch *zroot)             { return 0; }
 411 static inline int
 412 dbg_check_old_index(struct ubifs_info *c,
 413                     struct ubifs_zbranch *zroot)                  { return 0; }
 414 static inline int dbg_check_cats(struct ubifs_info *c)            { return 0; }
 415 static inline int dbg_check_ltab(struct ubifs_info *c)            { return 0; }
 416 static inline int dbg_chk_lpt_free_spc(struct ubifs_info *c)      { return 0; }
 417 static inline int dbg_chk_lpt_sz(struct ubifs_info *c,
 418                                  int action, int len)             { return 0; }
 419 static inline int dbg_check_synced_i_size(struct inode *inode)    { return 0; }
 420 static inline int dbg_check_dir_size(struct ubifs_info *c,
 421                                      const struct inode *dir)     { return 0; }
 422 static inline int dbg_check_tnc(struct ubifs_info *c, int extra)  { return 0; }
 423 static inline int dbg_check_idx_size(struct ubifs_info *c,
 424                                      long long idx_size)          { return 0; }
 425 static inline int dbg_check_filesystem(struct ubifs_info *c)      { return 0; }
 426 static inline void dbg_check_heap(struct ubifs_info *c,
 427                                   struct ubifs_lpt_heap *heap,
 428                                   int cat, int add_pos)           { return; }
 429 static inline int dbg_check_lpt_nodes(struct ubifs_info *c,
 430         struct ubifs_cnode *cnode, int row, int col)              { return 0; }
 431 static inline int dbg_check_inode_size(struct ubifs_info *c,
 432                                        const struct inode *inode,
 433                                        loff_t size)               { return 0; }
 434 static inline int
 435 dbg_check_data_nodes_order(struct ubifs_info *c,
 436                            struct list_head *head)                { return 0; }
 437 static inline int
 438 dbg_check_nondata_nodes_order(struct ubifs_info *c,
 439                               struct list_head *head)             { return 0; }
 440
 441 static inline int dbg_force_in_the_gaps(void)                     { return 0; }
 442 #define dbg_force_in_the_gaps_enabled() 0
 443 #define dbg_failure_mode                0
 444
 445 static inline int dbg_debugfs_init(void)                          { return 0; }
 446 static inline void dbg_debugfs_exit(void)                         { return; }
 447 static inline int dbg_debugfs_init_fs(struct ubifs_info *c)       { return 0; }
 448 static inline int dbg_debugfs_exit_fs(struct ubifs_info *c)       { return 0; }
 449
 450 #endif /* !CONFIG_UBIFS_FS_DEBUG */
 451 #endif /* !__UBIFS_DEBUG_H__ */