mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-18 02:20:59 +03:00
3b36f8319d
Internally ZFS keeps a small log to facilitate debugging. By default the log is disabled, to enable it set zfs_dbgmsg_enable=1. The contents of the log can be accessed by reading the /proc/spl/kstat/zfs/dbgmsg file. Writing 0 to this proc file clears the log. $ echo 1 >/sys/module/zfs/parameters/zfs_dbgmsg_enable $ echo 0 >/proc/spl/kstat/zfs/dbgmsg $ zpool import tank $ cat /proc/spl/kstat/zfs/dbgmsg 1 0 0x01 -1 0 2492357525542 2525836565501 timestamp message 1441141408 spa=tank async request task=1 1441141408 txg 70 open pool version 5000; software version 5000/5; ... 1441141409 spa=tank async request task=32 1441141409 txg 72 import pool version 5000; software version 5000/5; ... 1441141414 command: lt-zpool import tank Note the zfs_dbgmsg() and dprintf() functions are both now mapped to the same log. As mentioned above the kernel debug log can be accessed though the /proc/spl/kstat/zfs/dbgmsg kstat. For user space consumers log messages are immediately written to stdout after applying the ZFS_DEBUG environment variable. $ ZFS_DEBUG=on ./cmd/ztest/ztest -V Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Closes #3728
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
|
|
/* Do not include this file directly. Please use <sys/trace.h> instead. */
|
|
#ifndef _SYS_TRACE_DBGMSG_INDIRECT
|
|
#error "trace_dbgmsg.h included directly"
|
|
#endif
|
|
|
|
/*
|
|
* This file defines tracepoint events for use by the dbgmsg(),
|
|
* dprintf(), and SET_ERROR() interfaces. These are grouped here because
|
|
* they all provide a way to store simple messages in the debug log (as
|
|
* opposed to events used by the DTRACE_PROBE interfaces which typically
|
|
* dump structured data).
|
|
*
|
|
* This header is included inside the trace.h multiple inclusion guard,
|
|
* and it is guarded above against direct inclusion, so it and need not
|
|
* be guarded separately.
|
|
*/
|
|
|
|
/*
|
|
* Generic support for four argument tracepoints of the form:
|
|
*
|
|
* DTRACE_PROBE4(...,
|
|
* const char *, ...,
|
|
* const char *, ...,
|
|
* int, ...,
|
|
* const char *, ...);
|
|
*/
|
|
|
|
DECLARE_EVENT_CLASS(zfs_dprintf_class,
|
|
TP_PROTO(const char *file, const char *function, int line,
|
|
const char *msg),
|
|
TP_ARGS(file, function, line, msg),
|
|
TP_STRUCT__entry(
|
|
__field(const char *, file)
|
|
__field(const char *, function)
|
|
__field(int, line)
|
|
__string(msg, msg)
|
|
),
|
|
TP_fast_assign(
|
|
__entry->file = file;
|
|
__entry->function = function;
|
|
__entry->line = line;
|
|
__assign_str(msg, msg);
|
|
),
|
|
TP_printk("%s:%d:%s(): %s", __entry->file, __entry->line,
|
|
__entry->function, __get_str(msg))
|
|
);
|
|
|
|
#define DEFINE_DPRINTF_EVENT(name) \
|
|
DEFINE_EVENT(zfs_dprintf_class, name, \
|
|
TP_PROTO(const char *file, const char *function, int line, \
|
|
const char *msg), \
|
|
TP_ARGS(file, function, line, msg))
|
|
DEFINE_DPRINTF_EVENT(zfs_zfs__dprintf);
|
|
|
|
/*
|
|
* Generic support for four argument tracepoints of the form:
|
|
*
|
|
* DTRACE_PROBE4(...,
|
|
* const char *, ...,
|
|
* const char *, ...,
|
|
* int, ...,
|
|
* uintptr_t, ...);
|
|
*/
|
|
|
|
DECLARE_EVENT_CLASS(zfs_set_error_class,
|
|
TP_PROTO(const char *file, const char *function, int line,
|
|
uintptr_t error),
|
|
TP_ARGS(file, function, line, error),
|
|
TP_STRUCT__entry(
|
|
__field(const char *, file)
|
|
__field(const char *, function)
|
|
__field(int, line)
|
|
__field(uintptr_t, error)
|
|
),
|
|
TP_fast_assign(
|
|
__entry->file = strchr(file, '/') ? strrchr(file, '/') + 1 : file;
|
|
__entry->function = function;
|
|
__entry->line = line;
|
|
__entry->error = error;
|
|
),
|
|
TP_printk("%s:%d:%s(): error 0x%lx", __entry->file, __entry->line,
|
|
__entry->function, __entry->error)
|
|
);
|
|
|
|
#define DEFINE_SET_ERROR_EVENT(name) \
|
|
DEFINE_EVENT(zfs_set_error_class, name, \
|
|
TP_PROTO(const char *file, const char *function, int line, \
|
|
uintptr_t error), \
|
|
TP_ARGS(file, function, line, error))
|
|
DEFINE_SET_ERROR_EVENT(zfs_set__error);
|