linux_kernel/include/linux/sunrpc/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>

/*
 * Debugging macros etc
 */
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
extern unsigned int		rpc_debug;
extern unsigned int		nfs_debug;
extern unsigned int		nfsd_debug;
extern unsigned int		nlm_debug;
#endif

#define dprintk(fmt, ...)						\
	dfprintk(FACILITY, fmt, ##__VA_ARGS__)
#define dprintk_cont(fmt, ...)						\
	dfprintk_cont(FACILITY, fmt, ##__VA_ARGS__)
#define dprintk_rcu(fmt, ...)						\
	dfprintk_rcu(FACILITY, fmt, ##__VA_ARGS__)
#define dprintk_rcu_cont(fmt, ...)					\
	dfprintk_rcu_cont(FACILITY, fmt, ##__VA_ARGS__)

#undef ifdebug
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
# define ifdebug(fac)		if (unlikely(rpc_debug & RPCDBG_##fac))

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

# define dfprintk_cont(fac, fmt, ...)					\
do {									\
	ifdebug(fac)							\
		printk(KERN_CONT fmt, ##__VA_ARGS__);			\
} while (0)

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

# define dfprintk_rcu_cont(fac, fmt, ...)				\
do {									\
	ifdebug(fac) {							\
		rcu_read_lock();					\
		printk(KERN_CONT fmt, ##__VA_ARGS__);			\
		rcu_read_unlock();					\
	}								\
} while (0)

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

/*
 * Sysctl interface for RPC debugging
 */

struct rpc_clnt;
struct rpc_xprt;

#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
void		rpc_register_sysctl(void);
void		rpc_unregister_sysctl(void);
void		sunrpc_debugfs_init(void);
void		sunrpc_debugfs_exit(void);
void		rpc_clnt_debugfs_register(struct rpc_clnt *);
void		rpc_clnt_debugfs_unregister(struct rpc_clnt *);
void		rpc_xprt_debugfs_register(struct rpc_xprt *);
void		rpc_xprt_debugfs_unregister(struct rpc_xprt *);
#else
static inline void
sunrpc_debugfs_init(void)
{
	return;
}

static inline void
sunrpc_debugfs_exit(void)
{
	return;
}

static inline void
rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
{
	return;
}

static inline void
rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
{
	return;
}

static inline void
rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
{
	return;
}

static inline void
rpc_xprt_debugfs_unregister(struct rpc_xprt *xprt)
{
	return;
}
#endif

#endif /* _LINUX_SUNRPC_DEBUG_H_ */