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Diffstat (limited to 'ubuntu/aufs/debug.h')
| -rw-r--r-- | ubuntu/aufs/debug.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/ubuntu/aufs/debug.h b/ubuntu/aufs/debug.h new file mode 100644 index 000000000000..c4d5610a7f5c --- /dev/null +++ b/ubuntu/aufs/debug.h @@ -0,0 +1,243 @@ +/* + * Copyright (C) 2005-2012 Junjiro R. Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +/* + * debug print functions + */ + +#ifndef __AUFS_DEBUG_H__ +#define __AUFS_DEBUG_H__ + +#ifdef __KERNEL__ + +#include <asm/system.h> +#include <linux/module.h> +#include <linux/kallsyms.h> +#include <linux/sysrq.h> + +#ifdef CONFIG_AUFS_DEBUG +#define AuDebugOn(a) BUG_ON(a) + +/* module parameter */ +extern int aufs_debug; +static inline void au_debug(int n) +{ + aufs_debug = n; + smp_mb(); +} + +static inline int au_debug_test(void) +{ + return aufs_debug; +} +#else +#define AuDebugOn(a) do {} while (0) +AuStubVoid(au_debug, int n) +AuStubInt0(au_debug_test, void) +#endif /* CONFIG_AUFS_DEBUG */ + +/* ---------------------------------------------------------------------- */ + +/* debug print */ + +#define AuDbg(fmt, ...) do { \ + if (au_debug_test()) \ + pr_debug("DEBUG: " fmt, ##__VA_ARGS__); \ +} while (0) +#define AuLabel(l) AuDbg(#l "\n") +#define AuIOErr(fmt, ...) pr_err("I/O Error, " fmt, ##__VA_ARGS__) +#define AuWarn1(fmt, ...) do { \ + static unsigned char _c; \ + if (!_c++) \ + pr_warning(fmt, ##__VA_ARGS__); \ +} while (0) + +#define AuErr1(fmt, ...) do { \ + static unsigned char _c; \ + if (!_c++) \ + pr_err(fmt, ##__VA_ARGS__); \ +} while (0) + +#define AuIOErr1(fmt, ...) do { \ + static unsigned char _c; \ + if (!_c++) \ + AuIOErr(fmt, ##__VA_ARGS__); \ +} while (0) + +#define AuUnsupportMsg "This operation is not supported." \ + " Please report this application to aufs-users ML." +#define AuUnsupport(fmt, ...) do { \ + pr_err(AuUnsupportMsg "\n" fmt, ##__VA_ARGS__); \ + dump_stack(); \ +} while (0) + +#define AuTraceErr(e) do { \ + if (unlikely((e) < 0)) \ + AuDbg("err %d\n", (int)(e)); \ +} while (0) + +#define AuTraceErrPtr(p) do { \ + if (IS_ERR(p)) \ + AuDbg("err %ld\n", PTR_ERR(p)); \ +} while (0) + +/* dirty macros for debug print, use with "%.*s" and caution */ +#define AuLNPair(qstr) (qstr)->len, (qstr)->name +#define AuDLNPair(d) AuLNPair(&(d)->d_name) + +/* ---------------------------------------------------------------------- */ + +struct au_sbinfo; +struct au_finfo; +struct dentry; +#ifdef CONFIG_AUFS_DEBUG +extern char *au_plevel; +struct au_nhash; +void au_dpri_whlist(struct au_nhash *whlist); +struct au_vdir; +void au_dpri_vdir(struct au_vdir *vdir); +struct inode; +void au_dpri_inode(struct inode *inode); +void au_dpri_dalias(struct inode *inode); +void au_dpri_dentry(struct dentry *dentry); +struct file; +void au_dpri_file(struct file *filp); +struct super_block; +void au_dpri_sb(struct super_block *sb); + +void au_dbg_sleep_jiffy(int jiffy); +struct iattr; +void au_dbg_iattr(struct iattr *ia); + +#define au_dbg_verify_dinode(d) __au_dbg_verify_dinode(d, __func__, __LINE__) +void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line); +void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen); +void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen); +void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen); +void au_dbg_verify_kthread(void); + +int __init au_debug_init(void); +void au_debug_sbinfo_init(struct au_sbinfo *sbinfo); +#define AuDbgWhlist(w) do { \ + AuDbg(#w "\n"); \ + au_dpri_whlist(w); \ +} while (0) + +#define AuDbgVdir(v) do { \ + AuDbg(#v "\n"); \ + au_dpri_vdir(v); \ +} while (0) + +#define AuDbgInode(i) do { \ + AuDbg(#i "\n"); \ + au_dpri_inode(i); \ +} while (0) + +#define AuDbgDAlias(i) do { \ + AuDbg(#i "\n"); \ + au_dpri_dalias(i); \ +} while (0) + +#define AuDbgDentry(d) do { \ + AuDbg(#d "\n"); \ + au_dpri_dentry(d); \ +} while (0) + +#define AuDbgFile(f) do { \ + AuDbg(#f "\n"); \ + au_dpri_file(f); \ +} while (0) + +#define AuDbgSb(sb) do { \ + AuDbg(#sb "\n"); \ + au_dpri_sb(sb); \ +} while (0) + +#define AuDbgSleep(sec) do { \ + AuDbg("sleep %d sec\n", sec); \ + ssleep(sec); \ +} while (0) + +#define AuDbgSleepJiffy(jiffy) do { \ + AuDbg("sleep %d jiffies\n", jiffy); \ + au_dbg_sleep_jiffy(jiffy); \ +} while (0) + +#define AuDbgIAttr(ia) do { \ + AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \ + au_dbg_iattr(ia); \ +} while (0) + +#define AuDbgSym(addr) do { \ + char sym[KSYM_SYMBOL_LEN]; \ + sprint_symbol(sym, (unsigned long)addr); \ + AuDbg("%s\n", sym); \ +} while (0) + +#define AuInfoSym(addr) do { \ + char sym[KSYM_SYMBOL_LEN]; \ + sprint_symbol(sym, (unsigned long)addr); \ + AuInfo("%s\n", sym); \ +} while (0) +#else +AuStubVoid(au_dbg_verify_dinode, struct dentry *dentry) +AuStubVoid(au_dbg_verify_dir_parent, struct dentry *dentry, unsigned int sigen) +AuStubVoid(au_dbg_verify_nondir_parent, struct dentry *dentry, + unsigned int sigen) +AuStubVoid(au_dbg_verify_gen, struct dentry *parent, unsigned int sigen) +AuStubVoid(au_dbg_verify_kthread, void) +AuStubInt0(__init au_debug_init, void) +AuStubVoid(au_debug_sbinfo_init, struct au_sbinfo *sbinfo) + +#define AuDbgWhlist(w) do {} while (0) +#define AuDbgVdir(v) do {} while (0) +#define AuDbgInode(i) do {} while (0) +#define AuDbgDAlias(i) do {} while (0) +#define AuDbgDentry(d) do {} while (0) +#define AuDbgFile(f) do {} while (0) +#define AuDbgSb(sb) do {} while (0) +#define AuDbgSleep(sec) do {} while (0) +#define AuDbgSleepJiffy(jiffy) do {} while (0) +#define AuDbgIAttr(ia) do {} while (0) +#define AuDbgSym(addr) do {} while (0) +#define AuInfoSym(addr) do {} while (0) +#endif /* CONFIG_AUFS_DEBUG */ + +/* ---------------------------------------------------------------------- */ + +#ifdef CONFIG_AUFS_MAGIC_SYSRQ +int __init au_sysrq_init(void); +void au_sysrq_fin(void); + +#ifdef CONFIG_HW_CONSOLE +#define au_dbg_blocked() do { \ + WARN_ON(1); \ + handle_sysrq('w'); \ +} while (0) +#else +AuStubVoid(au_dbg_blocked, void) +#endif + +#else +AuStubInt0(__init au_sysrq_init, void) +AuStubVoid(au_sysrq_fin, void) +AuStubVoid(au_dbg_blocked, void) +#endif /* CONFIG_AUFS_MAGIC_SYSRQ */ + +#endif /* __KERNEL__ */ +#endif /* __AUFS_DEBUG_H__ */ |