module/zfs/include/sys/zfs_debug.h

   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  */
  24
  25 #ifndef _SYS_ZFS_DEBUG_H
  26 #define _SYS_ZFS_DEBUG_H
  27
  28 #ifdef  __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 #ifndef TRUE
  33 #define TRUE 1
  34 #endif
  35
  36 #ifndef FALSE
  37 #define FALSE 0
  38 #endif
  39
  40 /*
  41  * ZFS debugging
  42  */
  43
  44 #if defined(DEBUG) || !defined(_KERNEL)
  45 #define ZFS_DEBUG
  46 #endif
  47
  48 extern int zfs_flags;
  49
  50 #define ZFS_DEBUG_DPRINTF       0x0001
  51 #define ZFS_DEBUG_DBUF_VERIFY   0x0002
  52 #define ZFS_DEBUG_DNODE_VERIFY  0x0004
  53 #define ZFS_DEBUG_SNAPNAMES     0x0008
  54 #define ZFS_DEBUG_MODIFY        0x0010
  55
  56 #ifdef ZFS_DEBUG
  57 #if defined(_KERNEL) && defined(HAVE_SPL)
  58 /*
  59  * Log ZFS debug messages as the spl SS_USER1 subsystem.
  60  */
  61 #include <spl-debug.h>
  62
  63 #ifdef SS_DEBUG_SUBSYS
  64 #undef SS_DEBUG_SUBSYS
  65 #endif
  66 #define SS_DEBUG_SUBSYS SS_USER1
  67 #define dprintf(...) SDEBUG_LIMIT(SD_DPRINTF, __VA_ARGS__)
  68 #else
  69 extern void __dprintf(const char *file, const char *func,
  70     int line, const char *fmt, ...);
  71 #define dprintf(...) \
  72         if (zfs_flags & ZFS_DEBUG_DPRINTF) \
  73                 __dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
  74 #endif /* _KERNEL && HAVE_SPL */
  75 #else
  76 #define dprintf(...) ((void)0)
  77 #endif /* ZFS_DEBUG */
  78
  79 extern void zfs_panic_recover(const char *fmt, ...);
  80
  81 typedef struct zfs_dbgmsg {
  82         list_node_t zdm_node;
  83         time_t zdm_timestamp;
  84         char zdm_msg[1]; /* variable length allocation */
  85 } zfs_dbgmsg_t;
  86
  87 extern void zfs_dbgmsg_init(void);
  88 extern void zfs_dbgmsg_fini(void);
  89 extern void zfs_dbgmsg(const char *fmt, ...);
  90
  91 #ifdef  __cplusplus
  92 }
  93 #endif
  94
  95 #endif  /* _SYS_ZFS_DEBUG_H */