[linux-block.git] / fs / ocfs2 / cluster / masklog.h

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * Copyright (C) 2005 Oracle.  All rights reserved.
 *
 * This program 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., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef O2CLUSTER_MASKLOG_H
#define O2CLUSTER_MASKLOG_H

/*
 * For now this is a trivial wrapper around printk() that gives the critical
 * ability to enable sets of debugging output at run-time.  In the future this
 * will almost certainly be redirected to relayfs so that it can pay a
 * substantially lower heisenberg tax.
 *
 * Callers associate the message with a bitmask and a global bitmask is
 * maintained with help from /proc.  If any of the bits match the message is
 * output.
 *
 * We must have efficient bit tests on i386 and it seems gcc still emits crazy
 * code for the 64bit compare.  It emits very good code for the dual unsigned
 * long tests, though, completely avoiding tests that can never pass if the
 * caller gives a constant bitmask that fills one of the longs with all 0s.  So
 * the desire is to have almost all of the calls decided on by comparing just
 * one of the longs.  This leads to having infrequently given bits that are
 * frequently matched in the high bits.
 *
 * _ERROR and _NOTICE are used for messages that always go to the console and
 * have appropriate KERN_ prefixes.  We wrap these in our function instead of
 * just calling printk() so that this can eventually make its way through
 * relayfs along with the debugging messages.  Everything else gets KERN_DEBUG.
 * The inline tests and macro dance give GCC the opportunity to quite cleverly
 * only emit the appropriage printk() when the caller passes in a constant
 * mask, as is almost always the case.
 *
 * All this bitmask nonsense is managed from the files under
 * /sys/fs/o2cb/logmask/.  Reading the files gives a straightforward
 * indication of which bits are allowed (allow) or denied (off/deny).
 * 	ENTRY deny
 * 	EXIT deny
 * 	TCP off
 * 	MSG off
 * 	SOCKET off
 * 	ERROR allow
 * 	NOTICE allow
 *
 * Writing changes the state of a given bit and requires a strictly formatted
 * single write() call:
 *
 * 	write(fd, "allow", 5);
 *
 * Echoing allow/deny/off string into the logmask files can flip the bits
 * on or off as expected; here is the bash script for example:
 *
 * log_mask="/sys/fs/o2cb/log_mask"
 * for node in ENTRY EXIT TCP MSG SOCKET ERROR NOTICE; do
 *	echo allow >"$log_mask"/"$node"
 * done
 *
 * The debugfs.ocfs2 tool can also flip the bits with the -l option:
 *
 * debugfs.ocfs2 -l TCP allow
 */

/* for task_struct */
#include <linux/sched.h>

/* bits that are frequently given and infrequently matched in the low word */
/* NOTE: If you add a flag, you need to also update mlog.c! */
#define ML_ENTRY	0x0000000000000001ULL /* func call entry */
#define ML_EXIT		0x0000000000000002ULL /* func call exit */
#define ML_TCP		0x0000000000000004ULL /* net cluster/tcp.c */
#define ML_MSG		0x0000000000000008ULL /* net network messages */
#define ML_SOCKET	0x0000000000000010ULL /* net socket lifetime */
#define ML_HEARTBEAT	0x0000000000000020ULL /* hb all heartbeat tracking */
#define ML_HB_BIO	0x0000000000000040ULL /* hb io tracing */
#define ML_DLMFS	0x0000000000000080ULL /* dlm user dlmfs */
#define ML_DLM		0x0000000000000100ULL /* dlm general debugging */
#define ML_DLM_DOMAIN	0x0000000000000200ULL /* dlm domain debugging */
#define ML_DLM_THREAD	0x0000000000000400ULL /* dlm domain thread */
#define ML_DLM_MASTER	0x0000000000000800ULL /* dlm master functions */
#define ML_DLM_RECOVERY	0x0000000000001000ULL /* dlm master functions */
#define ML_AIO		0x0000000000002000ULL /* ocfs2 aio read and write */
#define ML_JOURNAL	0x0000000000004000ULL /* ocfs2 journalling functions */
#define ML_DISK_ALLOC	0x0000000000008000ULL /* ocfs2 disk allocation */
#define ML_SUPER	0x0000000000010000ULL /* ocfs2 mount / umount */
#define ML_FILE_IO	0x0000000000020000ULL /* ocfs2 file I/O */
#define ML_EXTENT_MAP	0x0000000000040000ULL /* ocfs2 extent map caching */
#define ML_DLM_GLUE	0x0000000000080000ULL /* ocfs2 dlm glue layer */
#define ML_BH_IO	0x0000000000100000ULL /* ocfs2 buffer I/O */
#define ML_UPTODATE	0x0000000000200000ULL /* ocfs2 caching sequence #'s */
#define ML_NAMEI	0x0000000000400000ULL /* ocfs2 directory / namespace */
#define ML_INODE	0x0000000000800000ULL /* ocfs2 inode manipulation */
#define ML_VOTE		0x0000000001000000ULL /* ocfs2 node messaging  */
#define ML_DCACHE	0x0000000002000000ULL /* ocfs2 dcache operations */
#define ML_CONN		0x0000000004000000ULL /* net connection management */
#define ML_QUORUM	0x0000000008000000ULL /* net connection quorum */
#define ML_EXPORT	0x0000000010000000ULL /* ocfs2 export operations */
#define ML_XATTR	0x0000000020000000ULL /* ocfs2 extended attributes */
#define ML_QUOTA	0x0000000040000000ULL /* ocfs2 quota operations */
#define ML_REFCOUNT	0x0000000080000000ULL /* refcount tree operations */
/* bits that are infrequently given and frequently matched in the high word */
#define ML_ERROR	0x0000000100000000ULL /* sent to KERN_ERR */
#define ML_NOTICE	0x0000000200000000ULL /* setn to KERN_NOTICE */
#define ML_KTHREAD	0x0000000400000000ULL /* kernel thread activity */

#define MLOG_INITIAL_AND_MASK (ML_ERROR|ML_NOTICE)
#define MLOG_INITIAL_NOT_MASK (ML_ENTRY|ML_EXIT)
#ifndef MLOG_MASK_PREFIX
#define MLOG_MASK_PREFIX 0
#endif

/*
 * When logging is disabled, force the bit test to 0 for anything other
 * than errors and notices, allowing gcc to remove the code completely.
 * When enabled, allow all masks.
 */
#if defined(CONFIG_OCFS2_DEBUG_MASKLOG)
#define ML_ALLOWED_BITS ~0
#else
#define ML_ALLOWED_BITS (ML_ERROR|ML_NOTICE)
#endif

#define MLOG_MAX_BITS 64

struct mlog_bits {
	unsigned long words[MLOG_MAX_BITS / BITS_PER_LONG];
};

extern struct mlog_bits mlog_and_bits, mlog_not_bits;

#if BITS_PER_LONG == 32

#define __mlog_test_u64(mask, bits)			\
	( (u32)(mask & 0xffffffff) & bits.words[0] || 	\
	  ((u64)(mask) >> 32) & bits.words[1] )
#define __mlog_set_u64(mask, bits) do {			\
	bits.words[0] |= (u32)(mask & 0xffffffff);	\
       	bits.words[1] |= (u64)(mask) >> 32;		\
} while (0)
#define __mlog_clear_u64(mask, bits) do {		\
	bits.words[0] &= ~((u32)(mask & 0xffffffff));	\
       	bits.words[1] &= ~((u64)(mask) >> 32);		\
} while (0)
#define MLOG_BITS_RHS(mask) {				\
	{						\
		[0] = (u32)(mask & 0xffffffff),		\
		[1] = (u64)(mask) >> 32,		\
	}						\
}

#else /* 32bit long above, 64bit long below */

#define __mlog_test_u64(mask, bits)	((mask) & bits.words[0])
#define __mlog_set_u64(mask, bits) do {		\
	bits.words[0] |= (mask);		\
} while (0)
#define __mlog_clear_u64(mask, bits) do {	\
	bits.words[0] &= ~(mask);		\
} while (0)
#define MLOG_BITS_RHS(mask) { { (mask) } }

#endif

/*
 * smp_processor_id() "helpfully" screams when called outside preemptible
 * regions in current kernels.  sles doesn't have the variants that don't
 * scream.  just do this instead of trying to guess which we're building
 * against.. *sigh*.
 */
#define __mlog_cpu_guess ({		\
	unsigned long _cpu = get_cpu();	\
	put_cpu();			\
	_cpu;				\
})

/* In the following two macros, the whitespace after the ',' just
 * before ##args is intentional. Otherwise, gcc 2.95 will eat the
 * previous token if args expands to nothing.
 */
#define __mlog_printk(level, fmt, args...)				\
	printk(level "(%u,%lu):%s:%d " fmt, task_pid_nr(current),	\
	       __mlog_cpu_guess, __PRETTY_FUNCTION__, __LINE__ ,	\
	       ##args)

#define mlog(mask, fmt, args...) do {					\
	u64 __m = MLOG_MASK_PREFIX | (mask);				\
	if ((__m & ML_ALLOWED_BITS) &&					\
	    __mlog_test_u64(__m, mlog_and_bits) &&			\
	    !__mlog_test_u64(__m, mlog_not_bits)) {			\
		if (__m & ML_ERROR)					\
			__mlog_printk(KERN_ERR, "ERROR: "fmt , ##args);	\
		else if (__m & ML_NOTICE)				\
			__mlog_printk(KERN_NOTICE, fmt , ##args);	\
		else __mlog_printk(KERN_INFO, fmt , ##args);		\
	}								\
} while (0)

#define mlog_errno(st) do {						\
	int _st = (st);							\
	if (_st != -ERESTARTSYS && _st != -EINTR &&			\
	    _st != AOP_TRUNCATED_PAGE && _st != -ENOSPC)		\
		mlog(ML_ERROR, "status = %lld\n", (long long)_st);	\
} while (0)

#if defined(CONFIG_OCFS2_DEBUG_MASKLOG)
#define mlog_entry(fmt, args...) do {					\
	mlog(ML_ENTRY, "ENTRY:" fmt , ##args);				\
} while (0)

#define mlog_entry_void() do {						\
	mlog(ML_ENTRY, "ENTRY:\n");					\
} while (0)

/*
 * We disable this for sparse.
 */
#if !defined(__CHECKER__)
#define mlog_exit(st) do {						     \
	if (__builtin_types_compatible_p(typeof(st), unsigned long))	     \
		mlog(ML_EXIT, "EXIT: %lu\n", (unsigned long) (st));	     \
	else if (__builtin_types_compatible_p(typeof(st), signed long))      \
		mlog(ML_EXIT, "EXIT: %ld\n", (signed long) (st));	     \
	else if (__builtin_types_compatible_p(typeof(st), unsigned int)	     \
		 || __builtin_types_compatible_p(typeof(st), unsigned short) \
		 || __builtin_types_compatible_p(typeof(st), unsigned char)) \
		mlog(ML_EXIT, "EXIT: %u\n", (unsigned int) (st));	     \
	else if (__builtin_types_compatible_p(typeof(st), signed int)	     \
		 || __builtin_types_compatible_p(typeof(st), signed short)   \
		 || __builtin_types_compatible_p(typeof(st), signed char))   \
		mlog(ML_EXIT, "EXIT: %d\n", (signed int) (st));		     \
	else if (__builtin_types_compatible_p(typeof(st), long long))	     \
		mlog(ML_EXIT, "EXIT: %lld\n", (long long) (st));	     \
	else								     \
		mlog(ML_EXIT, "EXIT: %llu\n", (unsigned long long) (st));    \
} while (0)
#else
#define mlog_exit(st) do {						     \
	mlog(ML_EXIT, "EXIT: %lld\n", (long long) (st));		     \
} while (0)
#endif

#define mlog_exit_ptr(ptr) do {						\
	mlog(ML_EXIT, "EXIT: %p\n", ptr);				\
} while (0)

#define mlog_exit_void() do {						\
	mlog(ML_EXIT, "EXIT\n");					\
} while (0)
#else
#define mlog_entry(...)  do { } while (0)
#define mlog_entry_void(...)  do { } while (0)
#define mlog_exit(...)  do { } while (0)
#define mlog_exit_ptr(...)  do { } while (0)
#define mlog_exit_void(...)  do { } while (0)
#endif  /* defined(CONFIG_OCFS2_DEBUG_MASKLOG) */

#define mlog_bug_on_msg(cond, fmt, args...) do {			\
	if (cond) {							\
		mlog(ML_ERROR, "bug expression: " #cond "\n");		\
		mlog(ML_ERROR, fmt, ##args);				\
		BUG();							\
	}								\
} while (0)

#include <linux/kobject.h>
#include <linux/sysfs.h>
int mlog_sys_init(struct kset *o2cb_subsys);
void mlog_sys_shutdown(void);

#endif /* O2CLUSTER_MASKLOG_H */
Commit	Line	Data
52fd3d6f ZB	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* Copyright (C) 2005 Oracle. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public
	17	* License along with this program; if not, write to the
	18	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	* Boston, MA 021110-1307, USA.
	20	*/
	21
	22	#ifndef O2CLUSTER_MASKLOG_H
	23	#define O2CLUSTER_MASKLOG_H
	24
	25	/*
	26	* For now this is a trivial wrapper around printk() that gives the critical
	27	* ability to enable sets of debugging output at run-time. In the future this
	28	* will almost certainly be redirected to relayfs so that it can pay a
	29	* substantially lower heisenberg tax.
	30	*
	31	* Callers associate the message with a bitmask and a global bitmask is
	32	* maintained with help from /proc. If any of the bits match the message is
	33	* output.
	34	*
	35	* We must have efficient bit tests on i386 and it seems gcc still emits crazy
	36	* code for the 64bit compare. It emits very good code for the dual unsigned
	37	* long tests, though, completely avoiding tests that can never pass if the
	38	* caller gives a constant bitmask that fills one of the longs with all 0s. So
	39	* the desire is to have almost all of the calls decided on by comparing just
	40	* one of the longs. This leads to having infrequently given bits that are
	41	* frequently matched in the high bits.
	42	*
	43	* _ERROR and _NOTICE are used for messages that always go to the console and
	44	* have appropriate KERN_ prefixes. We wrap these in our function instead of
	45	* just calling printk() so that this can eventually make its way through
	46	* relayfs along with the debugging messages. Everything else gets KERN_DEBUG.
	47	* The inline tests and macro dance give GCC the opportunity to quite cleverly
	48	* only emit the appropriage printk() when the caller passes in a constant
	49	* mask, as is almost always the case.
	50	*
2b53bc7b CL	51	* All this bitmask nonsense is managed from the files under
	52	* /sys/fs/o2cb/logmask/. Reading the files gives a straightforward
	53	* indication of which bits are allowed (allow) or denied (off/deny).
	54	* ENTRY deny
	55	* EXIT deny
52fd3d6f ZB	56	* TCP off
	57	* MSG off
	58	* SOCKET off
2b53bc7b CL	59	* ERROR allow
2b53bc7b CL	60	* NOTICE allow
52fd3d6f ZB	61	*
	62	* Writing changes the state of a given bit and requires a strictly formatted
	63	* single write() call:
	64	*
2b53bc7b	65	* write(fd, "allow", 5);
52fd3d6f	66	*
2b53bc7b CL	67	* Echoing allow/deny/off string into the logmask files can flip the bits
2b53bc7b CL	68	* on or off as expected; here is the bash script for example:
52fd3d6f	69	*
2b53bc7b CL	70	* log_mask="/sys/fs/o2cb/log_mask"
	71	* for node in ENTRY EXIT TCP MSG SOCKET ERROR NOTICE; do
	72	* echo allow >"$log_mask"/"$node"
	73	* done
52fd3d6f	74	*
2b53bc7b CL	75	* The debugfs.ocfs2 tool can also flip the bits with the -l option:
	76	*
	77	* debugfs.ocfs2 -l TCP allow
52fd3d6f ZB	78	*/
	79
	80	/* for task_struct */
	81	#include <linux/sched.h>
	82
	83	/* bits that are frequently given and infrequently matched in the low word */
	84	/* NOTE: If you add a flag, you need to also update mlog.c! */
	85	#define ML_ENTRY 0x0000000000000001ULL /* func call entry */
	86	#define ML_EXIT 0x0000000000000002ULL /* func call exit */
	87	#define ML_TCP 0x0000000000000004ULL /* net cluster/tcp.c */
	88	#define ML_MSG 0x0000000000000008ULL /* net network messages */
	89	#define ML_SOCKET 0x0000000000000010ULL /* net socket lifetime */
	90	#define ML_HEARTBEAT 0x0000000000000020ULL /* hb all heartbeat tracking */
	91	#define ML_HB_BIO 0x0000000000000040ULL /* hb io tracing */
	92	#define ML_DLMFS 0x0000000000000080ULL /* dlm user dlmfs */
	93	#define ML_DLM 0x0000000000000100ULL /* dlm general debugging */
	94	#define ML_DLM_DOMAIN 0x0000000000000200ULL /* dlm domain debugging */
	95	#define ML_DLM_THREAD 0x0000000000000400ULL /* dlm domain thread */
	96	#define ML_DLM_MASTER 0x0000000000000800ULL /* dlm master functions */
	97	#define ML_DLM_RECOVERY 0x0000000000001000ULL /* dlm master functions */
	98	#define ML_AIO 0x0000000000002000ULL /* ocfs2 aio read and write */
	99	#define ML_JOURNAL 0x0000000000004000ULL /* ocfs2 journalling functions */
	100	#define ML_DISK_ALLOC 0x0000000000008000ULL /* ocfs2 disk allocation */
	101	#define ML_SUPER 0x0000000000010000ULL /* ocfs2 mount / umount */
	102	#define ML_FILE_IO 0x0000000000020000ULL /* ocfs2 file I/O */
	103	#define ML_EXTENT_MAP 0x0000000000040000ULL /* ocfs2 extent map caching */
	104	#define ML_DLM_GLUE 0x0000000000080000ULL /* ocfs2 dlm glue layer */
	105	#define ML_BH_IO 0x0000000000100000ULL /* ocfs2 buffer I/O */
	106	#define ML_UPTODATE 0x0000000000200000ULL /* ocfs2 caching sequence #'s */
	107	#define ML_NAMEI 0x0000000000400000ULL /* ocfs2 directory / namespace */
	108	#define ML_INODE 0x0000000000800000ULL /* ocfs2 inode manipulation */
	109	#define ML_VOTE 0x0000000001000000ULL /* ocfs2 node messaging */
	110	#define ML_DCACHE 0x0000000002000000ULL /* ocfs2 dcache operations */
	111	#define ML_CONN 0x0000000004000000ULL /* net connection management */
	112	#define ML_QUORUM 0x0000000008000000ULL /* net connection quorum */
	113	#define ML_EXPORT 0x0000000010000000ULL /* ocfs2 export operations */
f56654c4	114	#define ML_XATTR 0x0000000020000000ULL /* ocfs2 extended attributes */
9e33d69f	115	#define ML_QUOTA 0x0000000040000000ULL /* ocfs2 quota operations */
f2c870e3	116	#define ML_REFCOUNT 0x0000000080000000ULL /* refcount tree operations */
52fd3d6f ZB	117	/* bits that are infrequently given and frequently matched in the high word */
	118	#define ML_ERROR 0x0000000100000000ULL /* sent to KERN_ERR */
	119	#define ML_NOTICE 0x0000000200000000ULL /* setn to KERN_NOTICE */
	120	#define ML_KTHREAD 0x0000000400000000ULL /* kernel thread activity */
	121
	122	#define MLOG_INITIAL_AND_MASK (ML_ERROR\|ML_NOTICE)
	123	#define MLOG_INITIAL_NOT_MASK (ML_ENTRY\|ML_EXIT)
	124	#ifndef MLOG_MASK_PREFIX
	125	#define MLOG_MASK_PREFIX 0
	126	#endif
	127
2b388c67 JB	128	/*
	129	* When logging is disabled, force the bit test to 0 for anything other
	130	* than errors and notices, allowing gcc to remove the code completely.
	131	* When enabled, allow all masks.
	132	*/
	133	#if defined(CONFIG_OCFS2_DEBUG_MASKLOG)
	134	#define ML_ALLOWED_BITS ~0
	135	#else
	136	#define ML_ALLOWED_BITS (ML_ERROR\|ML_NOTICE)
	137	#endif
	138
52fd3d6f ZB	139	#define MLOG_MAX_BITS 64
	140
	141	struct mlog_bits {
	142	unsigned long words[MLOG_MAX_BITS / BITS_PER_LONG];
	143	};
	144
	145	extern struct mlog_bits mlog_and_bits, mlog_not_bits;
	146
	147	#if BITS_PER_LONG == 32
	148
	149	#define __mlog_test_u64(mask, bits) \
	150	( (u32)(mask & 0xffffffff) & bits.words[0] \|\| \
	151	((u64)(mask) >> 32) & bits.words[1] )
	152	#define __mlog_set_u64(mask, bits) do { \
	153	bits.words[0] \|= (u32)(mask & 0xffffffff); \
	154	bits.words[1] \|= (u64)(mask) >> 32; \
	155	} while (0)
	156	#define __mlog_clear_u64(mask, bits) do { \
	157	bits.words[0] &= ~((u32)(mask & 0xffffffff)); \
	158	bits.words[1] &= ~((u64)(mask) >> 32); \
	159	} while (0)
	160	#define MLOG_BITS_RHS(mask) { \
	161	{ \
	162	[0] = (u32)(mask & 0xffffffff), \
	163	[1] = (u64)(mask) >> 32, \
	164	} \
	165	}
	166
	167	#else /* 32bit long above, 64bit long below */
	168
	169	#define __mlog_test_u64(mask, bits) ((mask) & bits.words[0])
	170	#define __mlog_set_u64(mask, bits) do { \
	171	bits.words[0] \|= (mask); \
	172	} while (0)
	173	#define __mlog_clear_u64(mask, bits) do { \
	174	bits.words[0] &= ~(mask); \
	175	} while (0)
	176	#define MLOG_BITS_RHS(mask) { { (mask) } }
	177
	178	#endif
	179
	180	/*
	181	* smp_processor_id() "helpfully" screams when called outside preemptible
	182	* regions in current kernels. sles doesn't have the variants that don't
	183	* scream. just do this instead of trying to guess which we're building
	184	* against.. sigh.
	185	*/
	186	#define __mlog_cpu_guess ({ \
	187	unsigned long _cpu = get_cpu(); \
	188	put_cpu(); \
	189	_cpu; \
	190	})
	191
	192	/* In the following two macros, the whitespace after the ',' just
	193	* before ##args is intentional. Otherwise, gcc 2.95 will eat the
	194	* previous token if args expands to nothing.
	195	*/
	196	#define __mlog_printk(level, fmt, args...) \
ba25f9dc	197	printk(level "(%u,%lu):%s:%d " fmt, task_pid_nr(current), \
52fd3d6f ZB	198	__mlog_cpu_guess, __PRETTY_FUNCTION__, __LINE__ , \
	199	##args)
	200
	201	#define mlog(mask, fmt, args...) do { \
	202	u64 __m = MLOG_MASK_PREFIX \| (mask); \
2b388c67 JB	203	if ((__m & ML_ALLOWED_BITS) && \
2b388c67 JB	204	__mlog_test_u64(__m, mlog_and_bits) && \
52fd3d6f ZB	205	!__mlog_test_u64(__m, mlog_not_bits)) { \
	206	if (__m & ML_ERROR) \
	207	__mlog_printk(KERN_ERR, "ERROR: "fmt , ##args); \
	208	else if (__m & ML_NOTICE) \
	209	__mlog_printk(KERN_NOTICE, fmt , ##args); \
	210	else __mlog_printk(KERN_INFO, fmt , ##args); \
	211	} \
	212	} while (0)
	213
	214	#define mlog_errno(st) do { \
	215	int _st = (st); \
	216	if (_st != -ERESTARTSYS && _st != -EINTR && \
ef9f86ce	217	_st != AOP_TRUNCATED_PAGE && _st != -ENOSPC) \
52fd3d6f ZB	218	mlog(ML_ERROR, "status = %lld\n", (long long)_st); \
	219	} while (0)
	220
2b388c67	221	#if defined(CONFIG_OCFS2_DEBUG_MASKLOG)
52fd3d6f ZB	222	#define mlog_entry(fmt, args...) do { \
	223	mlog(ML_ENTRY, "ENTRY:" fmt , ##args); \
	224	} while (0)
	225
	226	#define mlog_entry_void() do { \
	227	mlog(ML_ENTRY, "ENTRY:\n"); \
	228	} while (0)
	229
a1365647 AM	230	/*
a1365647 AM	231	* We disable this for sparse.
52fd3d6f	232	*/
a1365647	233	#if !defined(__CHECKER__)
52fd3d6f ZB	234	#define mlog_exit(st) do { \
	235	if (__builtin_types_compatible_p(typeof(st), unsigned long)) \
	236	mlog(ML_EXIT, "EXIT: %lu\n", (unsigned long) (st)); \
	237	else if (__builtin_types_compatible_p(typeof(st), signed long)) \
	238	mlog(ML_EXIT, "EXIT: %ld\n", (signed long) (st)); \
	239	else if (__builtin_types_compatible_p(typeof(st), unsigned int) \
	240	\|\| __builtin_types_compatible_p(typeof(st), unsigned short) \
	241	\|\| __builtin_types_compatible_p(typeof(st), unsigned char)) \
	242	mlog(ML_EXIT, "EXIT: %u\n", (unsigned int) (st)); \
	243	else if (__builtin_types_compatible_p(typeof(st), signed int) \
	244	\|\| __builtin_types_compatible_p(typeof(st), signed short) \
	245	\|\| __builtin_types_compatible_p(typeof(st), signed char)) \
	246	mlog(ML_EXIT, "EXIT: %d\n", (signed int) (st)); \
	247	else if (__builtin_types_compatible_p(typeof(st), long long)) \
	248	mlog(ML_EXIT, "EXIT: %lld\n", (long long) (st)); \
	249	else \
	250	mlog(ML_EXIT, "EXIT: %llu\n", (unsigned long long) (st)); \
	251	} while (0)
	252	#else
	253	#define mlog_exit(st) do { \
	254	mlog(ML_EXIT, "EXIT: %lld\n", (long long) (st)); \
	255	} while (0)
	256	#endif
	257
	258	#define mlog_exit_ptr(ptr) do { \
	259	mlog(ML_EXIT, "EXIT: %p\n", ptr); \
	260	} while (0)
	261
	262	#define mlog_exit_void() do { \
	263	mlog(ML_EXIT, "EXIT\n"); \
	264	} while (0)
2b388c67 JB	265	#else
	266	#define mlog_entry(...) do { } while (0)
	267	#define mlog_entry_void(...) do { } while (0)
	268	#define mlog_exit(...) do { } while (0)
	269	#define mlog_exit_ptr(...) do { } while (0)
	270	#define mlog_exit_void(...) do { } while (0)
	271	#endif /* defined(CONFIG_OCFS2_DEBUG_MASKLOG) */
52fd3d6f ZB	272
	273	#define mlog_bug_on_msg(cond, fmt, args...) do { \
	274	if (cond) { \
	275	mlog(ML_ERROR, "bug expression: " #cond "\n"); \
	276	mlog(ML_ERROR, fmt, ##args); \
	277	BUG(); \
	278	} \
	279	} while (0)
	280
52fd3d6f ZB	281	#include <linux/kobject.h>
52fd3d6f ZB	282	#include <linux/sysfs.h>
823bccfc	283	int mlog_sys_init(struct kset *o2cb_subsys);
52fd3d6f ZB	284	void mlog_sys_shutdown(void);
	285
	286	#endif /* O2CLUSTER_MASKLOG_H */