root/fs/jffs2/debug.h

INCLUDED FROM

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2001-2007 Red Hat, Inc.
   5  * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
   6  *
   7  * Created by David Woodhouse <dwmw2@infradead.org>
   8  *
   9  * For licensing information, see the file 'LICENCE' in this directory.
  10  *
  11  */
  12 
  13 #ifndef _JFFS2_DEBUG_H_
  14 #define _JFFS2_DEBUG_H_
  15 
  16 #include <linux/sched.h>
  17 
  18 #ifndef CONFIG_JFFS2_FS_DEBUG
  19 #define CONFIG_JFFS2_FS_DEBUG 0
  20 #endif
  21 
  22 #if CONFIG_JFFS2_FS_DEBUG > 0
  23 /* Enable "paranoia" checks and dumps */
  24 #define JFFS2_DBG_PARANOIA_CHECKS
  25 #define JFFS2_DBG_DUMPS
  26 
  27 /*
  28  * By defining/undefining the below macros one may select debugging messages
  29  * fro specific JFFS2 subsystems.
  30  */
  31 #define JFFS2_DBG_READINODE_MESSAGES
  32 #define JFFS2_DBG_FRAGTREE_MESSAGES
  33 #define JFFS2_DBG_DENTLIST_MESSAGES
  34 #define JFFS2_DBG_NODEREF_MESSAGES
  35 #define JFFS2_DBG_INOCACHE_MESSAGES
  36 #define JFFS2_DBG_SUMMARY_MESSAGES
  37 #define JFFS2_DBG_FSBUILD_MESSAGES
  38 #endif
  39 
  40 #if CONFIG_JFFS2_FS_DEBUG > 1
  41 #define JFFS2_DBG_FRAGTREE2_MESSAGES
  42 #define JFFS2_DBG_READINODE2_MESSAGES
  43 #define JFFS2_DBG_MEMALLOC_MESSAGES
  44 #endif
  45 
  46 /* Sanity checks are supposed to be light-weight and enabled by default */
  47 #define JFFS2_DBG_SANITY_CHECKS
  48 
  49 /*
  50  * Dx() are mainly used for debugging messages, they must go away and be
  51  * superseded by nicer dbg_xxx() macros...
  52  */
  53 #if CONFIG_JFFS2_FS_DEBUG > 0
  54 #define DEBUG
  55 #define D1(x) x
  56 #else
  57 #define D1(x)
  58 #endif
  59 
  60 #if CONFIG_JFFS2_FS_DEBUG > 1
  61 #define D2(x) x
  62 #else
  63 #define D2(x)
  64 #endif
  65 
  66 #define jffs2_dbg(level, fmt, ...)              \
  67 do {                                            \
  68         if (CONFIG_JFFS2_FS_DEBUG >= level)     \
  69                 pr_debug(fmt, ##__VA_ARGS__);   \
  70 } while (0)
  71 
  72 /* The prefixes of JFFS2 messages */
  73 #define JFFS2_DBG               KERN_DEBUG
  74 #define JFFS2_DBG_PREFIX        "[JFFS2 DBG]"
  75 #define JFFS2_DBG_MSG_PREFIX    JFFS2_DBG JFFS2_DBG_PREFIX
  76 
  77 /* JFFS2 message macros */
  78 #define JFFS2_ERROR(fmt, ...)                                   \
  79         pr_err("error: (%d) %s: " fmt,                          \
  80                task_pid_nr(current), __func__, ##__VA_ARGS__)
  81 
  82 #define JFFS2_WARNING(fmt, ...)                                         \
  83         pr_warn("warning: (%d) %s: " fmt,                               \
  84                 task_pid_nr(current), __func__, ##__VA_ARGS__)
  85 
  86 #define JFFS2_NOTICE(fmt, ...)                                          \
  87         pr_notice("notice: (%d) %s: " fmt,                              \
  88                   task_pid_nr(current), __func__, ##__VA_ARGS__)
  89 
  90 #define JFFS2_DEBUG(fmt, ...)                                           \
  91         printk(KERN_DEBUG "[JFFS2 DBG] (%d) %s: " fmt,                  \
  92                task_pid_nr(current), __func__, ##__VA_ARGS__)
  93 
  94 /*
  95  * We split our debugging messages on several parts, depending on the JFFS2
  96  * subsystem the message belongs to.
  97  */
  98 /* Read inode debugging messages */
  99 #ifdef JFFS2_DBG_READINODE_MESSAGES
 100 #define dbg_readinode(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 101 #else
 102 #define dbg_readinode(fmt, ...)
 103 #endif
 104 #ifdef JFFS2_DBG_READINODE2_MESSAGES
 105 #define dbg_readinode2(fmt, ...)        JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 106 #else
 107 #define dbg_readinode2(fmt, ...)
 108 #endif
 109 
 110 /* Fragtree build debugging messages */
 111 #ifdef JFFS2_DBG_FRAGTREE_MESSAGES
 112 #define dbg_fragtree(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 113 #else
 114 #define dbg_fragtree(fmt, ...)
 115 #endif
 116 #ifdef JFFS2_DBG_FRAGTREE2_MESSAGES
 117 #define dbg_fragtree2(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 118 #else
 119 #define dbg_fragtree2(fmt, ...)
 120 #endif
 121 
 122 /* Directory entry list manilulation debugging messages */
 123 #ifdef JFFS2_DBG_DENTLIST_MESSAGES
 124 #define dbg_dentlist(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 125 #else
 126 #define dbg_dentlist(fmt, ...)
 127 #endif
 128 
 129 /* Print the messages about manipulating node_refs */
 130 #ifdef JFFS2_DBG_NODEREF_MESSAGES
 131 #define dbg_noderef(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 132 #else
 133 #define dbg_noderef(fmt, ...)
 134 #endif
 135 
 136 /* Manipulations with the list of inodes (JFFS2 inocache) */
 137 #ifdef JFFS2_DBG_INOCACHE_MESSAGES
 138 #define dbg_inocache(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 139 #else
 140 #define dbg_inocache(fmt, ...)
 141 #endif
 142 
 143 /* Summary debugging messages */
 144 #ifdef JFFS2_DBG_SUMMARY_MESSAGES
 145 #define dbg_summary(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 146 #else
 147 #define dbg_summary(fmt, ...)
 148 #endif
 149 
 150 /* File system build messages */
 151 #ifdef JFFS2_DBG_FSBUILD_MESSAGES
 152 #define dbg_fsbuild(fmt, ...)   JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 153 #else
 154 #define dbg_fsbuild(fmt, ...)
 155 #endif
 156 
 157 /* Watch the object allocations */
 158 #ifdef JFFS2_DBG_MEMALLOC_MESSAGES
 159 #define dbg_memalloc(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 160 #else
 161 #define dbg_memalloc(fmt, ...)
 162 #endif
 163 
 164 /* Watch the XATTR subsystem */
 165 #ifdef JFFS2_DBG_XATTR_MESSAGES
 166 #define dbg_xattr(fmt, ...)  JFFS2_DEBUG(fmt, ##__VA_ARGS__)
 167 #else
 168 #define dbg_xattr(fmt, ...)
 169 #endif 
 170 
 171 /* "Sanity" checks */
 172 void
 173 __jffs2_dbg_acct_sanity_check_nolock(struct jffs2_sb_info *c,
 174                                      struct jffs2_eraseblock *jeb);
 175 void
 176 __jffs2_dbg_acct_sanity_check(struct jffs2_sb_info *c,
 177                               struct jffs2_eraseblock *jeb);
 178 
 179 /* "Paranoia" checks */
 180 void
 181 __jffs2_dbg_fragtree_paranoia_check(struct jffs2_inode_info *f);
 182 void
 183 __jffs2_dbg_fragtree_paranoia_check_nolock(struct jffs2_inode_info *f);
 184 void
 185 __jffs2_dbg_acct_paranoia_check(struct jffs2_sb_info *c,
 186                                 struct jffs2_eraseblock *jeb);
 187 void
 188 __jffs2_dbg_acct_paranoia_check_nolock(struct jffs2_sb_info *c,
 189                                        struct jffs2_eraseblock *jeb);
 190 void
 191 __jffs2_dbg_prewrite_paranoia_check(struct jffs2_sb_info *c,
 192                                     uint32_t ofs, int len);
 193 
 194 /* "Dump" functions */
 195 void
 196 __jffs2_dbg_dump_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 197 void
 198 __jffs2_dbg_dump_jeb_nolock(struct jffs2_eraseblock *jeb);
 199 void
 200 __jffs2_dbg_dump_block_lists(struct jffs2_sb_info *c);
 201 void
 202 __jffs2_dbg_dump_block_lists_nolock(struct jffs2_sb_info *c);
 203 void
 204 __jffs2_dbg_dump_node_refs(struct jffs2_sb_info *c,
 205                            struct jffs2_eraseblock *jeb);
 206 void
 207 __jffs2_dbg_dump_node_refs_nolock(struct jffs2_sb_info *c,
 208                                   struct jffs2_eraseblock *jeb);
 209 void
 210 __jffs2_dbg_dump_fragtree(struct jffs2_inode_info *f);
 211 void
 212 __jffs2_dbg_dump_fragtree_nolock(struct jffs2_inode_info *f);
 213 void
 214 __jffs2_dbg_dump_buffer(unsigned char *buf, int len, uint32_t offs);
 215 void
 216 __jffs2_dbg_dump_node(struct jffs2_sb_info *c, uint32_t ofs);
 217 
 218 #ifdef JFFS2_DBG_PARANOIA_CHECKS
 219 #define jffs2_dbg_fragtree_paranoia_check(f)                    \
 220         __jffs2_dbg_fragtree_paranoia_check(f)
 221 #define jffs2_dbg_fragtree_paranoia_check_nolock(f)             \
 222         __jffs2_dbg_fragtree_paranoia_check_nolock(f)
 223 #define jffs2_dbg_acct_paranoia_check(c, jeb)                   \
 224         __jffs2_dbg_acct_paranoia_check(c,jeb)
 225 #define jffs2_dbg_acct_paranoia_check_nolock(c, jeb)            \
 226         __jffs2_dbg_acct_paranoia_check_nolock(c,jeb)
 227 #define jffs2_dbg_prewrite_paranoia_check(c, ofs, len)          \
 228         __jffs2_dbg_prewrite_paranoia_check(c, ofs, len)
 229 #else
 230 #define jffs2_dbg_fragtree_paranoia_check(f)
 231 #define jffs2_dbg_fragtree_paranoia_check_nolock(f)
 232 #define jffs2_dbg_acct_paranoia_check(c, jeb)
 233 #define jffs2_dbg_acct_paranoia_check_nolock(c, jeb)
 234 #define jffs2_dbg_prewrite_paranoia_check(c, ofs, len)
 235 #endif /* !JFFS2_PARANOIA_CHECKS */
 236 
 237 #ifdef JFFS2_DBG_DUMPS
 238 #define jffs2_dbg_dump_jeb(c, jeb)                              \
 239         __jffs2_dbg_dump_jeb(c, jeb);
 240 #define jffs2_dbg_dump_jeb_nolock(jeb)                          \
 241         __jffs2_dbg_dump_jeb_nolock(jeb);
 242 #define jffs2_dbg_dump_block_lists(c)                           \
 243         __jffs2_dbg_dump_block_lists(c)
 244 #define jffs2_dbg_dump_block_lists_nolock(c)                    \
 245         __jffs2_dbg_dump_block_lists_nolock(c)
 246 #define jffs2_dbg_dump_fragtree(f)                              \
 247         __jffs2_dbg_dump_fragtree(f);
 248 #define jffs2_dbg_dump_fragtree_nolock(f)                       \
 249         __jffs2_dbg_dump_fragtree_nolock(f);
 250 #define jffs2_dbg_dump_buffer(buf, len, offs)                   \
 251         __jffs2_dbg_dump_buffer(*buf, len, offs);
 252 #define jffs2_dbg_dump_node(c, ofs)                             \
 253         __jffs2_dbg_dump_node(c, ofs);
 254 #else
 255 #define jffs2_dbg_dump_jeb(c, jeb)
 256 #define jffs2_dbg_dump_jeb_nolock(jeb)
 257 #define jffs2_dbg_dump_block_lists(c)
 258 #define jffs2_dbg_dump_block_lists_nolock(c)
 259 #define jffs2_dbg_dump_fragtree(f)
 260 #define jffs2_dbg_dump_fragtree_nolock(f)
 261 #define jffs2_dbg_dump_buffer(buf, len, offs)
 262 #define jffs2_dbg_dump_node(c, ofs)
 263 #endif /* !JFFS2_DBG_DUMPS */
 264 
 265 #ifdef JFFS2_DBG_SANITY_CHECKS
 266 #define jffs2_dbg_acct_sanity_check(c, jeb)                     \
 267         __jffs2_dbg_acct_sanity_check(c, jeb)
 268 #define jffs2_dbg_acct_sanity_check_nolock(c, jeb)              \
 269         __jffs2_dbg_acct_sanity_check_nolock(c, jeb)
 270 #else
 271 #define jffs2_dbg_acct_sanity_check(c, jeb)
 272 #define jffs2_dbg_acct_sanity_check_nolock(c, jeb)
 273 #endif /* !JFFS2_DBG_SANITY_CHECKS */
 274 
 275 #endif /* _JFFS2_DEBUG_H_ */