include/sys/spa_log_spacemap.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 /*
  23  * Copyright (c) 2018, 2019 by Delphix. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_SPA_LOG_SPACEMAP_H
  27 #define _SYS_SPA_LOG_SPACEMAP_H
  28
  29 #include <sys/avl.h>
  30
  31 typedef struct log_summary_entry {
  32         uint64_t lse_start;     /* start TXG */
  33         uint64_t lse_mscount;   /* # of metaslabs needed to be flushed */
  34         uint64_t lse_blkcount;  /* blocks held by this entry  */
  35         list_node_t lse_node;
  36 } log_summary_entry_t;
  37
  38 typedef struct spa_unflushed_stats  {
  39         /* used for memory heuristic */
  40         uint64_t sus_memused;   /* current memory used for unflushed trees */
  41
  42         /* used for block heuristic */
  43         uint64_t sus_blocklimit;        /* max # of log blocks allowed */
  44         uint64_t sus_nblocks;   /* # of blocks in log space maps currently */
  45 } spa_unflushed_stats_t;
  46
  47 typedef struct spa_log_sm {
  48         uint64_t sls_sm_obj;    /* space map object ID */
  49         uint64_t sls_txg;       /* txg logged on the space map */
  50         uint64_t sls_nblocks;   /* number of blocks in this log */
  51         uint64_t sls_mscount;   /* # of metaslabs flushed in the log's txg */
  52         avl_node_t sls_node;    /* node in spa_sm_logs_by_txg */
  53 } spa_log_sm_t;
  54
  55 int spa_ld_log_spacemaps(spa_t *);
  56
  57 void spa_generate_syncing_log_sm(spa_t *, dmu_tx_t *);
  58 void spa_flush_metaslabs(spa_t *, dmu_tx_t *);
  59 void spa_sync_close_syncing_log_sm(spa_t *);
  60
  61 void spa_cleanup_old_sm_logs(spa_t *, dmu_tx_t *);
  62
  63 uint64_t spa_log_sm_blocklimit(spa_t *);
  64 void spa_log_sm_set_blocklimit(spa_t *);
  65 uint64_t spa_log_sm_nblocks(spa_t *);
  66 uint64_t spa_log_sm_memused(spa_t *);
  67
  68 void spa_log_sm_decrement_mscount(spa_t *, uint64_t);
  69 void spa_log_sm_increment_current_mscount(spa_t *);
  70
  71 void spa_log_summary_add_flushed_metaslab(spa_t *);
  72 void spa_log_summary_decrement_mscount(spa_t *, uint64_t);
  73 void spa_log_summary_decrement_blkcount(spa_t *, uint64_t);
  74
  75 boolean_t spa_flush_all_logs_requested(spa_t *);
  76
  77 extern int zfs_keep_log_spacemaps_at_export;
  78
  79 #endif /* _SYS_SPA_LOG_SPACEMAP_H */