265 lines
9.9 KiB
C
265 lines
9.9 KiB
C
/* -*- 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 hidden from the /proc interface so that Joel
|
|
* doesn't have an aneurism. Reading the file gives a straight forward
|
|
* indication of which bits are on or off:
|
|
* ENTRY off
|
|
* EXIT off
|
|
* TCP off
|
|
* MSG off
|
|
* SOCKET off
|
|
* ERROR off
|
|
* NOTICE on
|
|
*
|
|
* Writing changes the state of a given bit and requires a strictly formatted
|
|
* single write() call:
|
|
*
|
|
* write(fd, "ENTRY on", 8);
|
|
*
|
|
* would turn the entry bit on. "1" is also accepted in the place of "on", and
|
|
* "off" and "0" behave as expected.
|
|
*
|
|
* Some trivial shell can flip all the bits on or off:
|
|
*
|
|
* log_mask="/proc/fs/ocfs2_nodemanager/log_mask"
|
|
* cat $log_mask | (
|
|
* while read bit status; do
|
|
* # $1 is "on" or "off", say
|
|
* echo "$bit $1" > $log_mask
|
|
* done
|
|
* )
|
|
*/
|
|
|
|
/* 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 */
|
|
/* 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
|
|
|
|
#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, current->pid, \
|
|
__mlog_cpu_guess, __PRETTY_FUNCTION__, __LINE__ , \
|
|
##args)
|
|
|
|
#define mlog(mask, fmt, args...) do { \
|
|
u64 __m = MLOG_MASK_PREFIX | (mask); \
|
|
if (__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) \
|
|
mlog(ML_ERROR, "status = %lld\n", (long long)_st); \
|
|
} while (0)
|
|
|
|
#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)
|
|
|
|
#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 subsystem *o2cb_subsys);
|
|
void mlog_sys_shutdown(void);
|
|
|
|
#endif /* O2CLUSTER_MASKLOG_H */
|