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 #ifdef CONFIG_UBIFS_FS_DEBUG
  27
  28 /**
  29  * ubifs_debug_info - per-FS debugging information.
  30  * @buf: a buffer of LEB size, used for various purposes
  31  * @old_zroot: old index root - used by 'dbg_check_old_index()'
  32  * @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
  33  * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
  34  * @failure_mode: failure mode for recovery testing
  35  * @fail_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls
  36  * @fail_timeout: time in jiffies when delay of failure mode expires
  37  * @fail_cnt: current number of calls to failure mode I/O functions
  38  * @fail_cnt_max: number of calls by which to delay failure mode
  39  * @chk_lpt_sz: used by LPT tree size checker
  40  * @chk_lpt_sz2: used by LPT tree size checker
  41  * @chk_lpt_wastage: used by LPT tree size checker
  42  * @chk_lpt_lebs: used by LPT tree size checker
  43  * @new_nhead_offs: used by LPT tree size checker
  44  * @new_ihead_lnum: used by debugging to check ihead_lnum
  45  * @new_ihead_offs: used by debugging to check ihead_offs
  46  */
  47 struct ubifs_debug_info {
  48         void *buf;
  49         struct ubifs_zbranch old_zroot;
  50         int old_zroot_level;
  51         unsigned long long old_zroot_sqnum;
  52         int failure_mode;
  53         int fail_delay;
  54         unsigned long fail_timeout;
  55         unsigned int fail_cnt;
  56         unsigned int fail_cnt_max;
  57         long long chk_lpt_sz;
  58         long long chk_lpt_sz2;
  59         long long chk_lpt_wastage;
  60         int chk_lpt_lebs;
  61         int new_nhead_offs;
  62         int new_ihead_lnum;
  63         int new_ihead_offs;
  64 };
  65
  66 #define ubifs_assert(expr) do {                                                \
  67         if (unlikely(!(expr))) {                                               \
  68                 printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
  69                        __func__, __LINE__, current->pid);                      \
  70                 dbg_dump_stack();                                              \
  71         }                                                                      \
  72 } while (0)
  73
  74 #define ubifs_assert_cmt_locked(c) do {                                        \
  75         if (unlikely(down_write_trylock(&(c)->commit_sem))) {                  \
  76                 up_write(&(c)->commit_sem);                                    \
  77                 printk(KERN_CRIT "commit lock is not locked!\n");              \
  78                 ubifs_assert(0);                                               \
  79         }                                                                      \
  80 } while (0)
  81
  82 #define dbg_dump_stack() do {                                                  \
  83         if (!dbg_failure_mode)                                                 \
  84                 dump_stack();                                                  \
  85 } while (0)
  86
  87 /* Generic debugging messages */
  88 #define dbg_msg(fmt, ...) do {                                                 \
  89         spin_lock(&dbg_lock);                                                  \
  90         printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,   \
  91                __func__, ##__VA_ARGS__);                                       \
  92         spin_unlock(&dbg_lock);                                                \
  93 } while (0)
  94
  95 #define dbg_do_msg(typ, fmt, ...) do {                                         \
  96         if (ubifs_msg_flags & typ)                                             \
  97                 dbg_msg(fmt, ##__VA_ARGS__);                                   \
  98 } while (0)
  99
 100 #define dbg_err(fmt, ...) do {                                                 \
 101         spin_lock(&dbg_lock);                                                  \
 102         ubifs_err(fmt, ##__VA_ARGS__);                                         \
 103         spin_unlock(&dbg_lock);                                                \
 104 } while (0)
 105
 106 const char *dbg_key_str0(const struct ubifs_info *c,
 107                          const union ubifs_key *key);
 108 const char *dbg_key_str1(const struct ubifs_info *c,
 109                          const union ubifs_key *key);
 110
 111 /*
 112  * DBGKEY macros require @dbg_lock to be held, which it is in the dbg message
 113  * macros.
 114  */
 115 #define DBGKEY(key) dbg_key_str0(c, (key))
 116 #define DBGKEY1(key) dbg_key_str1(c, (key))
 117
 118 /* General messages */
 119 #define dbg_gen(fmt, ...)   dbg_do_msg(UBIFS_MSG_GEN, fmt, ##__VA_ARGS__)
 120
 121 /* Additional journal messages */
 122 #define dbg_jnl(fmt, ...)   dbg_do_msg(UBIFS_MSG_JNL, fmt, ##__VA_ARGS__)
 123
 124 /* Additional TNC messages */
 125 #define dbg_tnc(fmt, ...)   dbg_do_msg(UBIFS_MSG_TNC, fmt, ##__VA_ARGS__)
 126
 127 /* Additional lprops messages */
 128 #define dbg_lp(fmt, ...)    dbg_do_msg(UBIFS_MSG_LP, fmt, ##__VA_ARGS__)
 129
 130 /* Additional LEB find messages */
 131 #define dbg_find(fmt, ...)  dbg_do_msg(UBIFS_MSG_FIND, fmt, ##__VA_ARGS__)
 132
 133 /* Additional mount messages */
 134 #define dbg_mnt(fmt, ...)   dbg_do_msg(UBIFS_MSG_MNT, fmt, ##__VA_ARGS__)
 135
 136 /* Additional I/O messages */
 137 #define dbg_io(fmt, ...)    dbg_do_msg(UBIFS_MSG_IO, fmt, ##__VA_ARGS__)
 138
 139 /* Additional commit messages */
 140 #define dbg_cmt(fmt, ...)   dbg_do_msg(UBIFS_MSG_CMT, fmt, ##__VA_ARGS__)
 141
 142 /* Additional budgeting messages */
 143 #define dbg_budg(fmt, ...)  dbg_do_msg(UBIFS_MSG_BUDG, fmt, ##__VA_ARGS__)
 144
 145 /* Additional log messages */
 146 #define dbg_log(fmt, ...)   dbg_do_msg(UBIFS_MSG_LOG, fmt, ##__VA_ARGS__)
 147
 148 /* Additional gc messages */
 149 #define dbg_gc(fmt, ...)    dbg_do_msg(UBIFS_MSG_GC, fmt, ##__VA_ARGS__)
 150
 151 /* Additional scan messages */
 152 #define dbg_scan(fmt, ...)  dbg_do_msg(UBIFS_MSG_SCAN, fmt, ##__VA_ARGS__)
 153
 154 /* Additional recovery messages */
 155 #define dbg_rcvry(fmt, ...) dbg_do_msg(UBIFS_MSG_RCVRY, fmt, ##__VA_ARGS__)
 156
 157 /*
 158  * Debugging message type flags (must match msg_type_names in debug.c).
 159  *
 160  * UBIFS_MSG_GEN: general messages
 161  * UBIFS_MSG_JNL: journal messages
 162  * UBIFS_MSG_MNT: mount messages
 163  * UBIFS_MSG_CMT: commit messages
 164  * UBIFS_MSG_FIND: LEB find messages
 165  * UBIFS_MSG_BUDG: budgeting messages
 166  * UBIFS_MSG_GC: garbage collection messages
 167  * UBIFS_MSG_TNC: TNC messages
 168  * UBIFS_MSG_LP: lprops messages
 169  * UBIFS_MSG_IO: I/O messages
 170  * UBIFS_MSG_LOG: log messages
 171  * UBIFS_MSG_SCAN: scan messages
 172  * UBIFS_MSG_RCVRY: recovery messages
 173  */
 174 enum {
 175         UBIFS_MSG_GEN   = 0x1,
 176         UBIFS_MSG_JNL   = 0x2,
 177         UBIFS_MSG_MNT   = 0x4,
 178         UBIFS_MSG_CMT   = 0x8,
 179         UBIFS_MSG_FIND  = 0x10,
 180         UBIFS_MSG_BUDG  = 0x20,
 181         UBIFS_MSG_GC    = 0x40,
 182         UBIFS_MSG_TNC   = 0x80,
 183         UBIFS_MSG_LP    = 0x100,
 184         UBIFS_MSG_IO    = 0x200,
 185         UBIFS_MSG_LOG   = 0x400,
 186         UBIFS_MSG_SCAN  = 0x800,
 187         UBIFS_MSG_RCVRY = 0x1000,
 188 };
 189
 190 /* Debugging message type flags for each default debug message level */
 191 #define UBIFS_MSG_LVL_0 0
 192 #define UBIFS_MSG_LVL_1 0x1
 193 #define UBIFS_MSG_LVL_2 0x7f
 194 #define UBIFS_MSG_LVL_3 0xffff
 195
 196 /*
 197  * Debugging check flags (must match chk_names in debug.c).
 198  *
 199  * UBIFS_CHK_GEN: general checks
 200  * UBIFS_CHK_TNC: check TNC
 201  * UBIFS_CHK_IDX_SZ: check index size
 202  * UBIFS_CHK_ORPH: check orphans
 203  * UBIFS_CHK_OLD_IDX: check the old index
 204  * UBIFS_CHK_LPROPS: check lprops
 205  * UBIFS_CHK_FS: check the file-system
 206  */
 207 enum {
 208         UBIFS_CHK_GEN     = 0x1,
 209         UBIFS_CHK_TNC     = 0x2,
 210         UBIFS_CHK_IDX_SZ  = 0x4,
 211         UBIFS_CHK_ORPH    = 0x8,
 212         UBIFS_CHK_OLD_IDX = 0x10,
 213         UBIFS_CHK_LPROPS  = 0x20,
 214         UBIFS_CHK_FS      = 0x40,
 215 };
 216
 217 /*
 218  * Special testing flags (must match tst_names in debug.c).
 219  *
 220  * UBIFS_TST_FORCE_IN_THE_GAPS: force the use of in-the-gaps method
 221  * UBIFS_TST_RCVRY: failure mode for recovery testing
 222  */
 223 enum {
 224         UBIFS_TST_FORCE_IN_THE_GAPS = 0x2,
 225         UBIFS_TST_RCVRY             = 0x4,
 226 };
 227
 228 #if CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 1
 229 #define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_1
 230 #elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 2
 231 #define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_2
 232 #elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 3
 233 #define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_3
 234 #else
 235 #define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_0
 236 #endif
 237
 238 #ifdef CONFIG_UBIFS_FS_DEBUG_CHKS
 239 #define UBIFS_CHK_FLAGS_DEFAULT 0xffffffff
 240 #else
 241 #define UBIFS_CHK_FLAGS_DEFAULT 0
 242 #endif
 243
 244 extern spinlock_t dbg_lock;
 245
 246 extern unsigned int ubifs_msg_flags;
 247 extern unsigned int ubifs_chk_flags;
 248 extern unsigned int ubifs_tst_flags;
 249
 250 int ubifs_debugging_init(struct ubifs_info *c);
 251 void ubifs_debugging_exit(struct ubifs_info *c);
 252
 253 /* Dump functions */
 254
 255 const char *dbg_ntype(int type);
 256 const char *dbg_cstate(int cmt_state);
 257 const char *dbg_get_key_dump(const struct ubifs_info *c,
 258                              const union ubifs_key *key);
 259 void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode);
 260 void dbg_dump_node(const struct ubifs_info *c, const void *node);
 261 void dbg_dump_budget_req(const struct ubifs_budget_req *req);
 262 void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
 263 void dbg_dump_budg(struct ubifs_info *c);
 264 void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
 265 void dbg_dump_lprops(struct ubifs_info *c);
 266 void dbg_dump_lpt_info(struct ubifs_info *c);
 267 void dbg_dump_leb(const struct ubifs_info *c, int lnum);
 268 void dbg_dump_znode(const struct ubifs_info *c,
 269                     const struct ubifs_znode *znode);
 270 void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat);
 271 void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
 272                     struct ubifs_nnode *parent, int iip);
 273 void dbg_dump_tnc(struct ubifs_info *c);
 274 void dbg_dump_index(struct ubifs_info *c);
 275
 276 /* Checking helper functions */
 277
 278 typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
 279                                  struct ubifs_zbranch *zbr, void *priv);
 280 typedef int (*dbg_znode_callback)(struct ubifs_info *c,
 281                                   struct ubifs_znode *znode, void *priv);
 282 int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
 283                    dbg_znode_callback znode_cb, void *priv);
 284
 285 /* Checking functions */
 286
 287 int dbg_check_lprops(struct ubifs_info *c);
 288 int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
 289 int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
 290 int dbg_check_cats(struct ubifs_info *c);
 291 int dbg_check_ltab(struct ubifs_info *c);
 292 int dbg_chk_lpt_free_spc(struct ubifs_info *c);
 293 int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len);
 294 int dbg_check_synced_i_size(struct inode *inode);
 295 int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
 296 int dbg_check_tnc(struct ubifs_info *c, int extra);
 297 int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
 298 int dbg_check_filesystem(struct ubifs_info *c);
 299 void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
 300                     int add_pos);
 301 int dbg_check_lprops(struct ubifs_info *c);
 302 int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
 303                         int row, int col);
 304
 305 /* Force the use of in-the-gaps method for testing */
 306
 307 #define dbg_force_in_the_gaps_enabled \
 308         (ubifs_tst_flags & UBIFS_TST_FORCE_IN_THE_GAPS)
 309
 310 int dbg_force_in_the_gaps(void);
 311
 312 /* Failure mode for recovery testing */
 313
 314 #define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
 315
 316 #ifndef UBIFS_DBG_PRESERVE_UBI
 317
 318 #define ubi_leb_read   dbg_leb_read
 319 #define ubi_leb_write  dbg_leb_write
 320 #define ubi_leb_change dbg_leb_change
 321 #define ubi_leb_erase  dbg_leb_erase
 322 #define ubi_leb_unmap  dbg_leb_unmap
 323 #define ubi_is_mapped  dbg_is_mapped
 324 #define ubi_leb_map    dbg_leb_map
 325
 326 #endif
 327
 328 int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
 329                  int len, int check);
 330 int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
 331                   int offset, int len, int dtype);
 332 int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
 333                    int len, int dtype);
 334 int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum);
 335 int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
 336 int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum);
 337 int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
 338
 339 static inline int dbg_read(struct ubi_volume_desc *desc, int lnum, char *buf,
 340                            int offset, int len)
 341 {
 342         return dbg_leb_read(desc, lnum, buf, offset, len, 0);
 343 }
 344
 345 static inline int dbg_write(struct ubi_volume_desc *desc, int lnum,
 346                             const void *buf, int offset, int len)
 347 {
 348         return dbg_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
 349 }
 350
 351 static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
 352                                     const void *buf, int len)
 353 {
 354         return dbg_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
 355 }
 356
 357 #else /* !CONFIG_UBIFS_FS_DEBUG */
 358
 359 /* Use "if (0)" to make compiler check arguments even if debugging is off */
 360 #define ubifs_assert(expr)  do {                                               \
 361         if (0 && (expr))                                                       \
 362                 printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
 363                        __func__, __LINE__, current->pid);                      \
 364 } while (0)
 365
 366 #define dbg_err(fmt, ...)   do {                                               \
 367         if (0)                                                                 \
 368                 ubifs_err(fmt, ##__VA_ARGS__);                                 \
 369 } while (0)
 370
 371 #define dbg_msg(fmt, ...) do {                                                 \
 372         if (0)                                                                 \
 373                 printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n",         \
 374                        current->pid, __func__, ##__VA_ARGS__);                 \
 375 } while (0)
 376
 377 #define dbg_dump_stack()
 378 #define ubifs_assert_cmt_locked(c)
 379
 380 #define dbg_gen(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 381 #define dbg_jnl(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 382 #define dbg_tnc(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 383 #define dbg_lp(fmt, ...)    dbg_msg(fmt, ##__VA_ARGS__)
 384 #define dbg_find(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)
 385 #define dbg_mnt(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 386 #define dbg_io(fmt, ...)    dbg_msg(fmt, ##__VA_ARGS__)
 387 #define dbg_cmt(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 388 #define dbg_budg(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)
 389 #define dbg_log(fmt, ...)   dbg_msg(fmt, ##__VA_ARGS__)
 390 #define dbg_gc(fmt, ...)    dbg_msg(fmt, ##__VA_ARGS__)
 391 #define dbg_scan(fmt, ...)  dbg_msg(fmt, ##__VA_ARGS__)
 392 #define dbg_rcvry(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
 393
 394 #define DBGKEY(key)  ((char *)(key))
 395 #define DBGKEY1(key) ((char *)(key))
 396
 397 #define ubifs_debugging_init(c)               0
 398 #define ubifs_debugging_exit(c)               ({})
 399
 400 #define dbg_ntype(type)                       ""
 401 #define dbg_cstate(cmt_state)                 ""
 402 #define dbg_get_key_dump(c, key)              ({})
 403 #define dbg_dump_inode(c, inode)              ({})
 404 #define dbg_dump_node(c, node)                ({})
 405 #define dbg_dump_budget_req(req)              ({})
 406 #define dbg_dump_lstats(lst)                  ({})
 407 #define dbg_dump_budg(c)                      ({})
 408 #define dbg_dump_lprop(c, lp)                 ({})
 409 #define dbg_dump_lprops(c)                    ({})
 410 #define dbg_dump_lpt_info(c)                  ({})
 411 #define dbg_dump_leb(c, lnum)                 ({})
 412 #define dbg_dump_znode(c, znode)              ({})
 413 #define dbg_dump_heap(c, heap, cat)           ({})
 414 #define dbg_dump_pnode(c, pnode, parent, iip) ({})
 415 #define dbg_dump_tnc(c)                       ({})
 416 #define dbg_dump_index(c)                     ({})
 417
 418 #define dbg_walk_index(c, leaf_cb, znode_cb, priv) 0
 419 #define dbg_old_index_check_init(c, zroot)         0
 420 #define dbg_check_old_index(c, zroot)              0
 421 #define dbg_check_cats(c)                          0
 422 #define dbg_check_ltab(c)                          0
 423 #define dbg_chk_lpt_free_spc(c)                    0
 424 #define dbg_chk_lpt_sz(c, action, len)             0
 425 #define dbg_check_synced_i_size(inode)             0
 426 #define dbg_check_dir_size(c, dir)                 0
 427 #define dbg_check_tnc(c, x)                        0
 428 #define dbg_check_idx_size(c, idx_size)            0
 429 #define dbg_check_filesystem(c)                    0
 430 #define dbg_check_heap(c, heap, cat, add_pos)      ({})
 431 #define dbg_check_lprops(c)                        0
 432 #define dbg_check_lpt_nodes(c, cnode, row, col)    0
 433 #define dbg_force_in_the_gaps_enabled              0
 434 #define dbg_force_in_the_gaps()                    0
 435 #define dbg_failure_mode                           0
 436
 437 #endif /* !CONFIG_UBIFS_FS_DEBUG */
 438
 439 #endif /* !__UBIFS_DEBUG_H__ */