freebsd-nq/include/sys/dsl_scan.h
Brian Behlendorf 6283f55ea1 Support custom build directories and move includes
One of the neat tricks an autoconf style project is capable of
is allow configurion/building in a directory other than the
source directory.  The major advantage to this is that you can
build the project various different ways while making changes
in a single source tree.

For example, this project is designed to work on various different
Linux distributions each of which work slightly differently.  This
means that changes need to verified on each of those supported
distributions perferably before the change is committed to the
public git repo.

Using nfs and custom build directories makes this much easier.
I now have a single source tree in nfs mounted on several different
systems each running a supported distribution.  When I make a
change to the source base I suspect may break things I can
concurrently build from the same source on all the systems each
in their own subdirectory.

wget -c http://github.com/downloads/behlendorf/zfs/zfs-x.y.z.tar.gz
tar -xzf zfs-x.y.z.tar.gz
cd zfs-x-y-z

------------------------- run concurrently ----------------------
<ubuntu system>  <fedora system>  <debian system>  <rhel6 system>
mkdir ubuntu     mkdir fedora     mkdir debian     mkdir rhel6
cd ubuntu        cd fedora        cd debian        cd rhel6
../configure     ../configure     ../configure     ../configure
make             make             make             make
make check       make check       make check       make check

This change also moves many of the include headers from individual
incude/sys directories under the modules directory in to a single
top level include directory.  This has the advantage of making
the build rules cleaner and logically it makes a bit more sense.
2010-09-08 12:38:56 -07:00

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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 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) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _SYS_DSL_SCAN_H
#define _SYS_DSL_SCAN_H
#include <sys/zfs_context.h>
#include <sys/zio.h>
#include <sys/ddt.h>
#include <sys/bplist.h>
#ifdef __cplusplus
extern "C" {
#endif
struct objset;
struct dsl_dir;
struct dsl_dataset;
struct dsl_pool;
struct dmu_tx;
/*
* All members of this structure must be uint64_t, for byteswap
* purposes.
*/
typedef struct dsl_scan_phys {
uint64_t scn_func; /* pool_scan_func_t */
uint64_t scn_state; /* dsl_scan_state_t */
uint64_t scn_queue_obj;
uint64_t scn_min_txg;
uint64_t scn_max_txg;
uint64_t scn_cur_min_txg;
uint64_t scn_cur_max_txg;
uint64_t scn_start_time;
uint64_t scn_end_time;
uint64_t scn_to_examine; /* total bytes to be scanned */
uint64_t scn_examined; /* bytes scanned so far */
uint64_t scn_to_process;
uint64_t scn_processed;
uint64_t scn_errors; /* scan I/O error count */
uint64_t scn_ddt_class_max;
ddt_bookmark_t scn_ddt_bookmark;
zbookmark_t scn_bookmark;
uint64_t scn_flags; /* dsl_scan_flags_t */
} dsl_scan_phys_t;
#define SCAN_PHYS_NUMINTS (sizeof (dsl_scan_phys_t) / sizeof (uint64_t))
typedef enum dsl_scan_flags {
DSF_VISIT_DS_AGAIN = 1<<0,
} dsl_scan_flags_t;
typedef struct dsl_scan {
struct dsl_pool *scn_dp;
boolean_t scn_pausing;
uint64_t scn_restart_txg;
uint64_t scn_sync_start_time;
zio_t *scn_zio_root;
/* for debugging / information */
uint64_t scn_visited_this_txg;
dsl_scan_phys_t scn_phys;
} dsl_scan_t;
int dsl_scan_init(struct dsl_pool *dp, uint64_t txg);
void dsl_scan_fini(struct dsl_pool *dp);
void dsl_scan_sync(struct dsl_pool *, dmu_tx_t *);
int dsl_scan_cancel(struct dsl_pool *);
int dsl_scan(struct dsl_pool *, pool_scan_func_t);
void dsl_resilver_restart(struct dsl_pool *, uint64_t txg);
boolean_t dsl_scan_resilvering(struct dsl_pool *dp);
boolean_t dsl_dataset_unstable(struct dsl_dataset *ds);
void dsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,
ddt_entry_t *dde, dmu_tx_t *tx);
void dsl_scan_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
void dsl_scan_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
void dsl_scan_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
struct dmu_tx *tx);
boolean_t dsl_scan_active(dsl_scan_t *scn);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DSL_SCAN_H */