aboutsummaryrefslogtreecommitdiff
path: root/fs/ubifs/debug.h
blob: 6b3a9e2ee19c9f8327b52c7f82421547908b9546 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
/*
 * This file is part of UBIFS.
 *
 * Copyright (C) 2006-2008 Nokia Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * Authors: Artem Bityutskiy (Битюцкий Артём)
 *          Adrian Hunter
 */

#ifndef __UBIFS_DEBUG_H__
#define __UBIFS_DEBUG_H__

/* Checking helper functions */
typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
				 struct ubifs_zbranch *zbr, void *priv);
typedef int (*dbg_znode_callback)(struct ubifs_info *c,
				  struct ubifs_znode *znode, void *priv);

/*
 * The UBIFS debugfs directory name pattern and maximum name length (3 for "ubi"
 * + 1 for "_" and plus 2x2 for 2 UBI numbers and 1 for the trailing zero byte.
 */
#define UBIFS_DFS_DIR_NAME "ubi%d_%d"
#define UBIFS_DFS_DIR_LEN  (3 + 1 + 2*2 + 1)

/**
 * ubifs_debug_info - per-FS debugging information.
 * @old_zroot: old index root - used by 'dbg_check_old_index()'
 * @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
 * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
 *
 * @pc_happened: non-zero if an emulated power cut happened
 * @pc_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls
 * @pc_timeout: time in jiffies when delay of failure mode expires
 * @pc_cnt: current number of calls to failure mode I/O functions
 * @pc_cnt_max: number of calls by which to delay failure mode
 *
 * @chk_lpt_sz: used by LPT tree size checker
 * @chk_lpt_sz2: used by LPT tree size checker
 * @chk_lpt_wastage: used by LPT tree size checker
 * @chk_lpt_lebs: used by LPT tree size checker
 * @new_nhead_offs: used by LPT tree size checker
 * @new_ihead_lnum: used by debugging to check @c->ihead_lnum
 * @new_ihead_offs: used by debugging to check @c->ihead_offs
 *
 * @saved_lst: saved lprops statistics (used by 'dbg_save_space_info()')
 * @saved_bi: saved budgeting information
 * @saved_free: saved amount of free space
 * @saved_idx_gc_cnt: saved value of @c->idx_gc_cnt
 *
 * @chk_gen: if general extra checks are enabled
 * @chk_index: if index xtra checks are enabled
 * @chk_orph: if orphans extra checks are enabled
 * @chk_lprops: if lprops extra checks are enabled
 * @chk_fs: if UBIFS contents extra checks are enabled
 * @tst_rcvry: if UBIFS recovery testing mode enabled
 *
 * @dfs_dir_name: name of debugfs directory containing this file-system's files
 * @dfs_dir: direntry object of the file-system debugfs directory
 * @dfs_dump_lprops: "dump lprops" debugfs knob
 * @dfs_dump_budg: "dump budgeting information" debugfs knob
 * @dfs_dump_tnc: "dump TNC" debugfs knob
 * @dfs_chk_gen: debugfs knob to enable UBIFS general extra checks
 * @dfs_chk_index: debugfs knob to enable UBIFS index extra checks
 * @dfs_chk_orph: debugfs knob to enable UBIFS orphans extra checks
 * @dfs_chk_lprops: debugfs knob to enable UBIFS LEP properties extra checks
 * @dfs_chk_fs: debugfs knob to enable UBIFS contents extra checks
 * @dfs_tst_rcvry: debugfs knob to enable UBIFS recovery testing
 */
struct ubifs_debug_info {
	struct ubifs_zbranch old_zroot;
	int old_zroot_level;
	unsigned long long old_zroot_sqnum;

	int pc_happened;
	int pc_delay;
	unsigned long pc_timeout;
	unsigned int pc_cnt;
	unsigned int pc_cnt_max;

	long long chk_lpt_sz;
	long long chk_lpt_sz2;
	long long chk_lpt_wastage;
	int chk_lpt_lebs;
	int new_nhead_offs;
	int new_ihead_lnum;
	int new_ihead_offs;

	struct ubifs_lp_stats saved_lst;
	struct ubifs_budg_info saved_bi;
	long long saved_free;
	int saved_idx_gc_cnt;

	unsigned int chk_gen:1;
	unsigned int chk_index:1;
	unsigned int chk_orph:1;
	unsigned int chk_lprops:1;
	unsigned int chk_fs:1;
	unsigned int tst_rcvry:1;

	char dfs_dir_name[UBIFS_DFS_DIR_LEN + 1];
	struct dentry *dfs_dir;
	struct dentry *dfs_dump_lprops;
	struct dentry *dfs_dump_budg;
	struct dentry *dfs_dump_tnc;
	struct dentry *dfs_chk_gen;
	struct dentry *dfs_chk_index;
	struct dentry *dfs_chk_orph;
	struct dentry *dfs_chk_lprops;
	struct dentry *dfs_chk_fs;
	struct dentry *dfs_tst_rcvry;
};

/**
 * ubifs_global_debug_info - global (not per-FS) UBIFS debugging information.
 *
 * @chk_gen: if general extra checks are enabled
 * @chk_index: if index xtra checks are enabled
 * @chk_orph: if orphans extra checks are enabled
 * @chk_lprops: if lprops extra checks are enabled
 * @chk_fs: if UBIFS contents extra checks are enabled
 * @tst_rcvry: if UBIFS recovery testing mode enabled
 */
struct ubifs_global_debug_info {
	unsigned int chk_gen:1;
	unsigned int chk_index:1;
	unsigned int chk_orph:1;
	unsigned int chk_lprops:1;
	unsigned int chk_fs:1;
	unsigned int tst_rcvry:1;
};

#define ubifs_assert(expr) do {                                                \
	if (unlikely(!(expr))) {                                               \
		printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
		       __func__, __LINE__, current->pid);                      \
		dump_stack();                                                  \
	}                                                                      \
} while (0)

#define ubifs_assert_cmt_locked(c) do {                                        \
	if (unlikely(down_write_trylock(&(c)->commit_sem))) {                  \
		up_write(&(c)->commit_sem);                                    \
		printk(KERN_CRIT "commit lock is not locked!\n");              \
		ubifs_assert(0);                                               \
	}                                                                      \
} while (0)

#define ubifs_dbg_msg(type, fmt, ...) \
	pr_debug("UBIFS DBG " type ": " fmt "\n", ##__VA_ARGS__)

#define DBG_KEY_BUF_LEN 32
#define ubifs_dbg_msg_key(type, key, fmt, ...) do {                            \
	char __tmp_key_buf[DBG_KEY_BUF_LEN];                                   \
	pr_debug("UBIFS DBG " type ": " fmt "%s\n", ##__VA_ARGS__,             \
		 dbg_snprintf_key(c, key, __tmp_key_buf, DBG_KEY_BUF_LEN));    \
} while (0)

/* Just a debugging messages not related to any specific UBIFS subsystem */
#define dbg_msg(fmt, ...)                                                      \
	printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,   \
	       __func__, ##__VA_ARGS__)

/* General messages */
#define dbg_gen(fmt, ...)   ubifs_dbg_msg("gen", fmt, ##__VA_ARGS__)
/* Additional journal messages */
#define dbg_jnl(fmt, ...)   ubifs_dbg_msg("jnl", fmt, ##__VA_ARGS__)
#define dbg_jnlk(key, fmt, ...) \
	ubifs_dbg_msg_key("jnl", key, fmt, ##__VA_ARGS__)
/* Additional TNC messages */
#define dbg_tnc(fmt, ...)   ubifs_dbg_msg("tnc", fmt, ##__VA_ARGS__)
#define dbg_tnck(key, fmt, ...) \
	ubifs_dbg_msg_key("tnc", key, fmt, ##__VA_ARGS__)
/* Additional lprops messages */
#define dbg_lp(fmt, ...)    ubifs_dbg_msg("lp", fmt, ##__VA_ARGS__)
/* Additional LEB find messages */
#define dbg_find(fmt, ...)  ubifs_dbg_msg("find", fmt, ##__VA_ARGS__)
/* Additional mount messages */
#define dbg_mnt(fmt, ...)   ubifs_dbg_msg("mnt", fmt, ##__VA_ARGS__)
#define dbg_mntk(key, fmt, ...) \
	ubifs_dbg_msg_key("mnt", key, fmt, ##__VA_ARGS__)
/* Additional I/O messages */
#define dbg_io(fmt, ...)    ubifs_dbg_msg("io", fmt, ##__VA_ARGS__)
/* Additional commit messages */
#define dbg_cmt(fmt, ...)   ubifs_dbg_msg("cmt", fmt, ##__VA_ARGS__)
/* Additional budgeting messages */
#define dbg_budg(fmt, ...)  ubifs_dbg_msg("budg", fmt, ##__VA_ARGS__)
/* Additional log messages */
#define dbg_log(fmt, ...)   ubifs_dbg_msg("log", fmt, ##__VA_ARGS__)
/* Additional gc messages */
#define dbg_gc(fmt, ...)    ubifs_dbg_msg("gc", fmt, ##__VA_ARGS__)
/* Additional scan messages */
#define dbg_scan(fmt, ...)  ubifs_dbg_msg("scan", fmt, ##__VA_ARGS__)
/* Additional recovery messages */
#define dbg_rcvry(fmt, ...) ubifs_dbg_msg("rcvry", fmt, ##__VA_ARGS__)

extern struct ubifs_global_debug_info ubifs_dbg;

static inline int dbg_is_chk_gen(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.chk_gen || c->dbg->chk_gen);
}
static inline int dbg_is_chk_index(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.chk_index || c->dbg->chk_index);
}
static inline int dbg_is_chk_orph(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.chk_orph || c->dbg->chk_orph);
}
static inline int dbg_is_chk_lprops(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.chk_lprops || c->dbg->chk_lprops);
}
static inline int dbg_is_chk_fs(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.chk_fs || c->dbg->chk_fs);
}
static inline int dbg_is_tst_rcvry(const struct ubifs_info *c)
{
	return !!(ubifs_dbg.tst_rcvry || c->dbg->tst_rcvry);
}
static inline int dbg_is_power_cut(const struct ubifs_info *c)
{
	return !!c->dbg->pc_happened;
}

int ubifs_debugging_init(struct ubifs_info *c);
void ubifs_debugging_exit(struct ubifs_info *c);

/* Dump functions */
const char *dbg_ntype(int type);
const char *dbg_cstate(int cmt_state);
const char *dbg_jhead(int jhead);
const char *dbg_get_key_dump(const struct ubifs_info *c,
			     const union ubifs_key *key);
const char *dbg_snprintf_key(const struct ubifs_info *c,
			     const union ubifs_key *key, char *buffer, int len);
void ubifs_dump_inode(struct ubifs_info *c, const struct inode *inode);
void ubifs_dump_node(const struct ubifs_info *c, const void *node);
void ubifs_dump_budget_req(const struct ubifs_budget_req *req);
void ubifs_dump_lstats(const struct ubifs_lp_stats *lst);
void ubifs_dump_budg(struct ubifs_info *c, const struct ubifs_budg_info *bi);
void ubifs_dump_lprop(const struct ubifs_info *c,
		      const struct ubifs_lprops *lp);
void ubifs_dump_lprops(struct ubifs_info *c);
void ubifs_dump_lpt_info(struct ubifs_info *c);
void ubifs_dump_leb(const struct ubifs_info *c, int lnum);
void ubifs_dump_sleb(const struct ubifs_info *c,
		     const struct ubifs_scan_leb *sleb, int offs);
void ubifs_dump_znode(const struct ubifs_info *c,
		      const struct ubifs_znode *znode);
void ubifs_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap,
		     int cat);
void ubifs_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
		      struct ubifs_nnode *parent, int iip);
void ubifs_dump_tnc(struct ubifs_info *c);
void ubifs_dump_index(struct ubifs_info *c);
void ubifs_dump_lpt_lebs(const struct ubifs_info *c);

int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
		   dbg_znode_callback znode_cb, void *priv);

/* Checking functions */
void dbg_save_space_info(struct ubifs_info *c);
int dbg_check_space_info(struct ubifs_info *c);
int dbg_check_lprops(struct ubifs_info *c);
int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int dbg_check_cats(struct ubifs_info *c);
int dbg_check_ltab(struct ubifs_info *c);
int dbg_chk_lpt_free_spc(struct ubifs_info *c);
int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len);
int dbg_check_synced_i_size(const struct ubifs_info *c, struct inode *inode);
int dbg_check_dir(struct ubifs_info *c, const struct inode *dir);
int dbg_check_tnc(struct ubifs_info *c, int extra);
int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
int dbg_check_filesystem(struct ubifs_info *c);
void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
		    int add_pos);
int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
			int row, int col);
int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode,
			 loff_t size);
int dbg_check_data_nodes_order(struct ubifs_info *c, struct list_head *head);
int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head);

int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs,
		  int len, int dtype);
int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len,
		   int dtype);
int dbg_leb_unmap(struct ubifs_info *c, int lnum);
int dbg_leb_map(struct ubifs_info *c, int lnum, int dtype);

/* Debugfs-related stuff */
int dbg_debugfs_init(void);
void dbg_debugfs_exit(void);
int dbg_debugfs_init_fs(struct ubifs_info *c);
void dbg_debugfs_exit_fs(struct ubifs_info *c);

#endif /* !__UBIFS_DEBUG_H__ */