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debug.h
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1 /*
2  * JFFS2 -- Journalling Flash File System, Version 2.
3  *
4  * Copyright © 2001-2007 Red Hat, Inc.
5  * Copyright © 2004-2010 David Woodhouse <[email protected]>
6  *
7  * Created by David Woodhouse <[email protected]>
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51  * superseded by nicer dbg_xxx() macros...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_ */
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