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