2 * Copyright (C) 2005-2012 Junjiro R. Okajima
4 * This program, aufs is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * debug print functions
23 #ifndef __AUFS_DEBUG_H__
24 #define __AUFS_DEBUG_H__
28 #include <asm/system.h>
29 #include <linux/module.h>
30 #include <linux/kallsyms.h>
31 #include <linux/sysrq.h>
33 #ifdef CONFIG_AUFS_DEBUG
34 #define AuDebugOn(a) BUG_ON(a)
36 /* module parameter */
37 extern int aufs_debug;
38 static inline void au_debug(int n)
44 static inline int au_debug_test(void)
49 #define AuDebugOn(a) do {} while (0)
50 AuStubVoid(au_debug, int n)
51 AuStubInt0(au_debug_test, void)
52 #endif /* CONFIG_AUFS_DEBUG */
54 /* ---------------------------------------------------------------------- */
58 #define AuDbg(fmt, ...) do { \
59 if (au_debug_test()) \
60 pr_debug("DEBUG: " fmt, ##__VA_ARGS__); \
62 #define AuLabel(l) AuDbg(#l "\n")
63 #define AuIOErr(fmt, ...) pr_err("I/O Error, " fmt, ##__VA_ARGS__)
64 #define AuWarn1(fmt, ...) do { \
65 static unsigned char _c; \
67 pr_warning(fmt, ##__VA_ARGS__); \
70 #define AuErr1(fmt, ...) do { \
71 static unsigned char _c; \
73 pr_err(fmt, ##__VA_ARGS__); \
76 #define AuIOErr1(fmt, ...) do { \
77 static unsigned char _c; \
79 AuIOErr(fmt, ##__VA_ARGS__); \
82 #define AuUnsupportMsg "This operation is not supported." \
83 " Please report this application to aufs-users ML."
84 #define AuUnsupport(fmt, ...) do { \
85 pr_err(AuUnsupportMsg "\n" fmt, ##__VA_ARGS__); \
89 #define AuTraceErr(e) do { \
90 if (unlikely((e) < 0)) \
91 AuDbg("err %d\n", (int)(e)); \
94 #define AuTraceErrPtr(p) do { \
96 AuDbg("err %ld\n", PTR_ERR(p)); \
99 /* dirty macros for debug print, use with "%.*s" and caution */
100 #define AuLNPair(qstr) (qstr)->len, (qstr)->name
101 #define AuDLNPair(d) AuLNPair(&(d)->d_name)
103 /* ---------------------------------------------------------------------- */
108 #ifdef CONFIG_AUFS_DEBUG
109 extern char *au_plevel;
111 void au_dpri_whlist(struct au_nhash *whlist);
113 void au_dpri_vdir(struct au_vdir *vdir);
115 void au_dpri_inode(struct inode *inode);
116 void au_dpri_dalias(struct inode *inode);
117 void au_dpri_dentry(struct dentry *dentry);
119 void au_dpri_file(struct file *filp);
121 void au_dpri_sb(struct super_block *sb);
123 void au_dbg_sleep_jiffy(int jiffy);
125 void au_dbg_iattr(struct iattr *ia);
127 #define au_dbg_verify_dinode(d) __au_dbg_verify_dinode(d, __func__, __LINE__)
128 void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line);
129 void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen);
130 void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen);
131 void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen);
132 void au_dbg_verify_kthread(void);
134 int __init au_debug_init(void);
135 void au_debug_sbinfo_init(struct au_sbinfo *sbinfo);
136 #define AuDbgWhlist(w) do { \
141 #define AuDbgVdir(v) do { \
146 #define AuDbgInode(i) do { \
151 #define AuDbgDAlias(i) do { \
156 #define AuDbgDentry(d) do { \
161 #define AuDbgFile(f) do { \
166 #define AuDbgSb(sb) do { \
171 #define AuDbgSleep(sec) do { \
172 AuDbg("sleep %d sec\n", sec); \
176 #define AuDbgSleepJiffy(jiffy) do { \
177 AuDbg("sleep %d jiffies\n", jiffy); \
178 au_dbg_sleep_jiffy(jiffy); \
181 #define AuDbgIAttr(ia) do { \
182 AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \
186 #define AuDbgSym(addr) do { \
187 char sym[KSYM_SYMBOL_LEN]; \
188 sprint_symbol(sym, (unsigned long)addr); \
189 AuDbg("%s\n", sym); \
192 #define AuInfoSym(addr) do { \
193 char sym[KSYM_SYMBOL_LEN]; \
194 sprint_symbol(sym, (unsigned long)addr); \
195 AuInfo("%s\n", sym); \
198 AuStubVoid(au_dbg_verify_dinode, struct dentry *dentry)
199 AuStubVoid(au_dbg_verify_dir_parent, struct dentry *dentry, unsigned int sigen)
200 AuStubVoid(au_dbg_verify_nondir_parent, struct dentry *dentry,
202 AuStubVoid(au_dbg_verify_gen, struct dentry *parent, unsigned int sigen)
203 AuStubVoid(au_dbg_verify_kthread, void)
204 AuStubInt0(__init au_debug_init, void)
205 AuStubVoid(au_debug_sbinfo_init, struct au_sbinfo *sbinfo)
207 #define AuDbgWhlist(w) do {} while (0)
208 #define AuDbgVdir(v) do {} while (0)
209 #define AuDbgInode(i) do {} while (0)
210 #define AuDbgDAlias(i) do {} while (0)
211 #define AuDbgDentry(d) do {} while (0)
212 #define AuDbgFile(f) do {} while (0)
213 #define AuDbgSb(sb) do {} while (0)
214 #define AuDbgSleep(sec) do {} while (0)
215 #define AuDbgSleepJiffy(jiffy) do {} while (0)
216 #define AuDbgIAttr(ia) do {} while (0)
217 #define AuDbgSym(addr) do {} while (0)
218 #define AuInfoSym(addr) do {} while (0)
219 #endif /* CONFIG_AUFS_DEBUG */
221 /* ---------------------------------------------------------------------- */
223 #ifdef CONFIG_AUFS_MAGIC_SYSRQ
224 int __init au_sysrq_init(void);
225 void au_sysrq_fin(void);
227 #ifdef CONFIG_HW_CONSOLE
228 #define au_dbg_blocked() do { \
233 AuStubVoid(au_dbg_blocked, void)
237 AuStubInt0(__init au_sysrq_init, void)
238 AuStubVoid(au_sysrq_fin, void)
239 AuStubVoid(au_dbg_blocked, void)
240 #endif /* CONFIG_AUFS_MAGIC_SYSRQ */
242 #endif /* __KERNEL__ */
243 #endif /* __AUFS_DEBUG_H__ */