mirror of
https://git.proxmox.com/git/mirror_zfs
synced 2025-11-04 01:41:27 +00:00
67a1b03791
Block Cloning allows to manually clone a file (or a subset of its blocks) into another (or the same) file by just creating additional references to the data blocks without copying the data itself. Those references are kept in the Block Reference Tables (BRTs). The whole design of block cloning is documented in module/zfs/brt.c. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net> Closes #13392
114 lines
3.4 KiB
C
114 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 https://opensource.org/licenses/CDDL-1.0.
|
|
* 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)
|
|
#define ZFS_DEBUG_BRT (1 << 14)
|
|
|
|
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 */
|