fs/jfs/jfs_debug.h

Source file repositories/reference/linux-study-clean/fs/jfs/jfs_debug.h

File Facts

System
Linux kernel
Corpus path
fs/jfs/jfs_debug.h
Extension
.h
Size
2727 bytes
Lines
110
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _H_JFS_DEBUG
#define _H_JFS_DEBUG

/*
 *	jfs_debug.h
 *
 * global debug message, data structure/macro definitions
 * under control of CONFIG_JFS_DEBUG, CONFIG_JFS_STATISTICS;
 */

/*
 * Create /proc/fs/jfs if procfs is enabled andeither
 * CONFIG_JFS_DEBUG or CONFIG_JFS_STATISTICS is defined
 */
#if defined(CONFIG_PROC_FS) && (defined(CONFIG_JFS_DEBUG) || defined(CONFIG_JFS_STATISTICS))
#define PROC_FS_JFS
extern void jfs_proc_init(void);
extern void jfs_proc_clean(void);
#endif

/*
 *	assert with traditional printf/panic
 */
#define assert(p) do {	\
	if (!(p)) {	\
		printk(KERN_CRIT "BUG at %s:%d assert(%s)\n",	\
		       __FILE__, __LINE__, #p);			\
		BUG();	\
	}		\
} while (0)

/*
 *	debug ON
 *	--------
 */
#ifdef CONFIG_JFS_DEBUG
#define ASSERT(p) assert(p)

/* printk verbosity */
#define JFS_LOGLEVEL_ERR 1
#define JFS_LOGLEVEL_WARN 2
#define JFS_LOGLEVEL_DEBUG 3
#define JFS_LOGLEVEL_INFO 4

extern int jfsloglevel;

int jfs_txanchor_proc_show(struct seq_file *m, void *v);

/* information message: e.g., configuration, major event */
#define jfs_info(fmt, arg...) do {			\
	if (jfsloglevel >= JFS_LOGLEVEL_INFO)		\
		printk(KERN_INFO fmt "\n", ## arg);	\
} while (0)

/* debug message: ad hoc */
#define jfs_debug(fmt, arg...) do {			\
	if (jfsloglevel >= JFS_LOGLEVEL_DEBUG)		\
		printk(KERN_DEBUG fmt "\n", ## arg);	\
} while (0)

/* warn message: */
#define jfs_warn(fmt, arg...) do {			\
	if (jfsloglevel >= JFS_LOGLEVEL_WARN)		\
		printk(KERN_WARNING fmt "\n", ## arg);	\
} while (0)

/* error event message: e.g., i/o error */
#define jfs_err(fmt, arg...) do {			\
	if (jfsloglevel >= JFS_LOGLEVEL_ERR)		\
		printk(KERN_ERR fmt "\n", ## arg);	\
} while (0)

/*
 *	debug OFF
 *	---------
 */
#else				/* CONFIG_JFS_DEBUG */
#define ASSERT(p) do {} while (0)
#define jfs_info(fmt, arg...) do {} while (0)
#define jfs_debug(fmt, arg...) do {} while (0)
#define jfs_warn(fmt, arg...) do {} while (0)
#define jfs_err(fmt, arg...) do {} while (0)
#endif				/* CONFIG_JFS_DEBUG */

/*
 *	statistics
 *	----------
 */
#ifdef	CONFIG_JFS_STATISTICS
int jfs_lmstats_proc_show(struct seq_file *m, void *v);

Annotation

Implementation Notes