include/sys/dsl_scan.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) 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 #ifndef _SYS_DSL_SCAN_H
  26 #define _SYS_DSL_SCAN_H
  27
  28 #include <sys/zfs_context.h>
  29 #include <sys/zio.h>
  30 #include <sys/ddt.h>
  31 #include <sys/bplist.h>
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 struct objset;
  38 struct dsl_dir;
  39 struct dsl_dataset;
  40 struct dsl_pool;
  41 struct dmu_tx;
  42
  43 /*
  44  * All members of this structure must be uint64_t, for byteswap
  45  * purposes.
  46  */
  47 typedef struct dsl_scan_phys {
  48         uint64_t scn_func; /* pool_scan_func_t */
  49         uint64_t scn_state; /* dsl_scan_state_t */
  50         uint64_t scn_queue_obj;
  51         uint64_t scn_min_txg;
  52         uint64_t scn_max_txg;
  53         uint64_t scn_cur_min_txg;
  54         uint64_t scn_cur_max_txg;
  55         uint64_t scn_start_time;
  56         uint64_t scn_end_time;
  57         uint64_t scn_to_examine; /* total bytes to be scanned */
  58         uint64_t scn_examined; /* bytes scanned so far */
  59         uint64_t scn_to_process;
  60         uint64_t scn_processed;
  61         uint64_t scn_errors;    /* scan I/O error count */
  62         uint64_t scn_ddt_class_max;
  63         ddt_bookmark_t scn_ddt_bookmark;
  64         zbookmark_t scn_bookmark;
  65         uint64_t scn_flags; /* dsl_scan_flags_t */
  66 } dsl_scan_phys_t;
  67
  68 #define SCAN_PHYS_NUMINTS (sizeof (dsl_scan_phys_t) / sizeof (uint64_t))
  69
  70 typedef enum dsl_scan_flags {
  71         DSF_VISIT_DS_AGAIN = 1<<0,
  72 } dsl_scan_flags_t;
  73
  74 typedef struct dsl_scan {
  75         struct dsl_pool *scn_dp;
  76
  77         boolean_t scn_pausing;
  78         uint64_t scn_restart_txg;
  79         uint64_t scn_sync_start_time;
  80         zio_t *scn_zio_root;
  81
  82         /* for debugging / information */
  83         uint64_t scn_visited_this_txg;
  84
  85         dsl_scan_phys_t scn_phys;
  86 } dsl_scan_t;
  87
  88 int dsl_scan_init(struct dsl_pool *dp, uint64_t txg);
  89 void dsl_scan_fini(struct dsl_pool *dp);
  90 void dsl_scan_sync(struct dsl_pool *, dmu_tx_t *);
  91 int dsl_scan_cancel(struct dsl_pool *);
  92 int dsl_scan(struct dsl_pool *, pool_scan_func_t);
  93 void dsl_resilver_restart(struct dsl_pool *, uint64_t txg);
  94 boolean_t dsl_scan_resilvering(struct dsl_pool *dp);
  95 boolean_t dsl_dataset_unstable(struct dsl_dataset *ds);
  96 void dsl_scan_ddt_entry(dsl_scan_t *scn, enum zio_checksum checksum,
  97     ddt_entry_t *dde, dmu_tx_t *tx);
  98 void dsl_scan_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
  99 void dsl_scan_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
 100 void dsl_scan_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
 101     struct dmu_tx *tx);
 102 boolean_t dsl_scan_active(dsl_scan_t *scn);
 103
 104 #ifdef  __cplusplus
 105 }
 106 #endif
 107
 108 #endif /* _SYS_DSL_SCAN_H */