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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
     23  * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
     24  */
     25 
     26 #ifndef _SYS_ZFS_DEBUG_H
     27 #define	_SYS_ZFS_DEBUG_H
     28 
     29 #ifdef	__cplusplus
     30 extern "C" {
     31 #endif
     32 
     33 #ifndef TRUE
     34 #define	TRUE 1
     35 #endif
     36 
     37 #ifndef FALSE
     38 #define	FALSE 0
     39 #endif
     40 
     41 /*
     42  * ZFS debugging
     43  */
     44 
     45 #if defined(DEBUG) || !defined(_KERNEL)
     46 #if !defined(ZFS_DEBUG)
     47 #define	ZFS_DEBUG
     48 #endif
     49 #endif
     50 
     51 extern int zfs_flags;
     52 extern boolean_t zfs_recover;
     53 extern boolean_t zfs_free_leak_on_eio;
     54 
     55 #define	ZFS_DEBUG_DPRINTF		(1 << 0)
     56 #define	ZFS_DEBUG_DBUF_VERIFY		(1 << 1)
     57 #define	ZFS_DEBUG_DNODE_VERIFY		(1 << 2)
     58 #define	ZFS_DEBUG_SNAPNAMES		(1 << 3)
     59 #define	ZFS_DEBUG_MODIFY		(1 << 4)
     60 #define	ZFS_DEBUG_SPA			(1 << 5)
     61 #define	ZFS_DEBUG_ZIO_FREE		(1 << 6)
     62 #define	ZFS_DEBUG_HISTOGRAM_VERIFY	(1 << 7)
     63 #define	ZFS_DEBUG_METASLAB_VERIFY	(1 << 8)
     64 
     65 #ifdef ZFS_DEBUG
     66 extern void __dprintf(const char *file, const char *func,
     67     int line, const char *fmt, ...);
     68 #define	dprintf(...) \
     69 	if (zfs_flags & ZFS_DEBUG_DPRINTF) \
     70 		__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
     71 #else
     72 #define	dprintf(...) ((void)0)
     73 #endif /* ZFS_DEBUG */
     74 
     75 extern void zfs_panic_recover(const char *fmt, ...);
     76 
     77 typedef struct zfs_dbgmsg {
     78 	list_node_t zdm_node;
     79 	time_t zdm_timestamp;
     80 	char zdm_msg[1]; /* variable length allocation */
     81 } zfs_dbgmsg_t;
     82 
     83 extern void zfs_dbgmsg_init(void);
     84 extern void zfs_dbgmsg_fini(void);
     85 extern void zfs_dbgmsg(const char *fmt, ...);
     86 extern void zfs_dbgmsg_print(const char *tag);
     87 
     88 #ifdef illumos
     89 #ifndef _KERNEL
     90 extern int dprintf_find_string(const char *string);
     91 #endif
     92 #endif /* illumos */
     93 
     94 #ifdef	__cplusplus
     95 }
     96 #endif
     97 
     98 #endif	/* _SYS_ZFS_DEBUG_H */
     99