1. 根目录:
2. include
3. linux
4. sunrpc
5. debug.h

/*
 * linux/include/linux/sunrpc/debug.h
 *
 * Debugging support for sunrpc module
 *
 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
 */
#ifndef _LINUX_SUNRPC_DEBUG_H_
#define _LINUX_SUNRPC_DEBUG_H_

#include <uapi/linux/sunrpc/debug.h>


/*
 * Enable RPC debugging/profiling.
 */
#ifdef CONFIG_SUNRPC_DEBUG
#define  RPC_DEBUG
#endif
#ifdef CONFIG_TRACEPOINTS
#define RPC_TRACEPOINTS
#endif
/* #define  RPC_PROFILE */

/*
 * Debugging macros etc
 */
#ifdef RPC_DEBUG
extern unsigned int		rpc_debug;
extern unsigned int		nfs_debug;
extern unsigned int		nfsd_debug;
extern unsigned int		nlm_debug;
#endif

#define dprintk(args...)	dfprintk(FACILITY, ## args)
#define dprintk_rcu(args...)	dfprintk_rcu(FACILITY, ## args)

#undef ifdebug
#ifdef RPC_DEBUG			
# define ifdebug(fac)		if (unlikely(rpc_debug & RPCDBG_##fac))

# define dfprintk(fac, args...)	\
	do { \
		ifdebug(fac) \
			printk(KERN_DEFAULT args); \
	} while (0)

# define dfprintk_rcu(fac, args...)	\
	do { \
		ifdebug(fac) { \
			rcu_read_lock(); \
			printk(KERN_DEFAULT args); \
			rcu_read_unlock(); \
		} \
	} while (0)

# define RPC_IFDEBUG(x)		x
#else
# define ifdebug(fac)		if (0)
# define dfprintk(fac, args...)	do {} while (0)
# define dfprintk_rcu(fac, args...)	do {} while (0)
# define RPC_IFDEBUG(x)
#endif

/*
 * Sysctl interface for RPC debugging
 */
#ifdef RPC_DEBUG
void		rpc_register_sysctl(void);
void		rpc_unregister_sysctl(void);
#endif

#endif /* _LINUX_SUNRPC_DEBUG_H_ */