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/*
* 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
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2019 by Delphix. All rights reserved.
*/
#ifndef _SYS_ZFS_DEBUG_H
#define _SYS_ZFS_DEBUG_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
extern int zfs_flags;
extern int zfs_recover;
extern int zfs_free_leak_on_eio;
extern int zfs_dbgmsg_enable;
#define ZFS_DEBUG_DPRINTF (1 << 0)
#define ZFS_DEBUG_DBUF_VERIFY (1 << 1)
#define ZFS_DEBUG_DNODE_VERIFY (1 << 2)
#define ZFS_DEBUG_SNAPNAMES (1 << 3)
#define ZFS_DEBUG_MODIFY (1 << 4)
/* 1<<5 was previously used, try not to reuse */
#define ZFS_DEBUG_ZIO_FREE (1 << 6)
#define ZFS_DEBUG_HISTOGRAM_VERIFY (1 << 7)
#define ZFS_DEBUG_METASLAB_VERIFY (1 << 8)
#define ZFS_DEBUG_SET_ERROR (1 << 9)
#define ZFS_DEBUG_INDIRECT_REMAP (1 << 10)
#define ZFS_DEBUG_TRIM (1 << 11)
#define ZFS_DEBUG_LOG_SPACEMAP (1 << 12)
#define ZFS_DEBUG_METASLAB_ALLOC (1 << 13)
extern void __set_error(const char *file, const char *func, int line, int err);
extern void __zfs_dbgmsg(char *buf);
extern void __dprintf(boolean_t dprint, const char *file, const char *func,
int line, const char *fmt, ...) __attribute__((format(printf, 5, 6)));
/*
* Some general principles for using zfs_dbgmsg():
* 1. We don't want to pollute the log with typically-irrelevant messages,
* so don't print too many messages in the "normal" code path - O(1)
* per txg.
* 2. We want to know for sure what happened, so make the message specific
* (e.g. *which* thing am I operating on).
* 3. Do print a message when something unusual or unexpected happens
* (e.g. error cases).
* 4. Print a message when making user-initiated on-disk changes.
*
* Note that besides principle 1, another reason that we don't want to
* use zfs_dbgmsg in high-frequency routines is the potential impact
* that it can have on performance.
*/
#define zfs_dbgmsg(...) \
if (zfs_dbgmsg_enable) \
__dprintf(B_FALSE, __FILE__, __func__, __LINE__, __VA_ARGS__)
#ifdef ZFS_DEBUG
/*
* To enable this:
*
* $ echo 1 >/sys/module/zfs/parameters/zfs_flags
*/
#define dprintf(...) \
if (zfs_flags & ZFS_DEBUG_DPRINTF) \
__dprintf(B_TRUE, __FILE__, __func__, __LINE__, __VA_ARGS__)
#else
#define dprintf(...) ((void)0)
#endif /* ZFS_DEBUG */
extern void zfs_panic_recover(const char *fmt, ...);
extern void zfs_dbgmsg_init(void);
extern void zfs_dbgmsg_fini(void);
#ifndef _KERNEL
extern int dprintf_find_string(const char *string);
extern void zfs_dbgmsg_print(const char *tag);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ZFS_DEBUG_H */
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