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8740cf4a2f
Redefine the SET_ERROR macro in terms of __dprintf() so the error return codes get logged as both tracepoint events (if tracepoints are enabled) and as ZFS debug log entries. This also allows us to use the same definition of SET_ERROR() in kernel and user space. Define a new debug flag ZFS_DEBUG_SET_ERROR=512 that may be bitwise or'd into zfs_flags. Setting this flag enables both dprintf() and SET_ERROR() messages in the debug log. That is, setting ZFS_DEBUG_SET_ERROR and ZFS_DEBUG_DPRINTF|ZFS_DEBUG_SET_ERROR are equivalent (this was done for sake of simplicity). Leaving ZFS_DEBUG_SET_ERROR unset suppresses the SET_ERROR() messages which helps avoid cluttering up the logs. To enable SET_ERROR() logging, run: echo 1 > /sys/module/zfs/parameters/zfs_dbgmsg_enable echo 512 > /sys/module/zfs/parameters/zfs_flags Remove the zfs_set_error_class tracepoints event class since SET_ERROR() now uses __dprintf(). This sacrifices a bit of granularity when selecting individual tracepoint events to enable but it makes the code simpler. Include file, function, and line number information in debug log entries. The information is now added to the message buffer in __dprintf() and as a result the zfs_dprintf_class tracepoints event class was changed from a 4 parameter interface to a single parameter. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov> Closes #6400
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_ZFS_DEBUG_H
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#define _SYS_ZFS_DEBUG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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extern int zfs_flags;
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extern int zfs_recover;
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extern int zfs_free_leak_on_eio;
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#define ZFS_DEBUG_DPRINTF (1 << 0)
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#define ZFS_DEBUG_DBUF_VERIFY (1 << 1)
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#define ZFS_DEBUG_DNODE_VERIFY (1 << 2)
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#define ZFS_DEBUG_SNAPNAMES (1 << 3)
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#define ZFS_DEBUG_MODIFY (1 << 4)
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#define ZFS_DEBUG_SPA (1 << 5)
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#define ZFS_DEBUG_ZIO_FREE (1 << 6)
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#define ZFS_DEBUG_HISTOGRAM_VERIFY (1 << 7)
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#define ZFS_DEBUG_METASLAB_VERIFY (1 << 8)
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#define ZFS_DEBUG_SET_ERROR (1 << 9)
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extern void __dprintf(const char *file, const char *func,
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int line, const char *fmt, ...);
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#define dprintf(...) \
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__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
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#define zfs_dbgmsg(...) \
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__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
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extern void zfs_panic_recover(const char *fmt, ...);
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typedef struct zfs_dbgmsg {
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list_node_t zdm_node;
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time_t zdm_timestamp;
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int zdm_size;
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char zdm_msg[1]; /* variable length allocation */
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} zfs_dbgmsg_t;
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extern void zfs_dbgmsg_init(void);
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extern void zfs_dbgmsg_fini(void);
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#ifndef _KERNEL
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extern int dprintf_find_string(const char *string);
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extern void zfs_dbgmsg_print(const char *tag);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_ZFS_DEBUG_H */
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