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  * Copyright 2019 Joyent, Inc.
25  */
26 
27 #ifndef _SYS_SPA_LOG_SPACEMAP_H
28 #define	_SYS_SPA_LOG_SPACEMAP_H
29 
30 #include <sys/avl.h>
31 
32 #ifndef DIV_ROUND_UP
33 #define	DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
34 #endif
35 
36 typedef struct log_summary_entry {
37 	uint64_t lse_start;	/* start TXG */
38 	uint64_t lse_mscount;	/* # of metaslabs needed to be flushed */
39 	uint64_t lse_blkcount;	/* blocks held by this entry  */
40 	list_node_t lse_node;
41 } log_summary_entry_t;
42 
43 typedef struct spa_unflushed_stats  {
44 	/* used for memory heuristic */
45 	uint64_t sus_memused;	/* current memory used for unflushed trees */
46 
47 	/* used for block heuristic */
48 	uint64_t sus_blocklimit;	/* max # of log blocks allowed */
49 	uint64_t sus_nblocks;	/* # of blocks in log space maps currently */
50 } spa_unflushed_stats_t;
51 
52 typedef struct spa_log_sm {
53 	uint64_t sls_sm_obj;	/* space map object ID */
54 	uint64_t sls_txg;	/* txg logged on the space map */
55 	uint64_t sls_nblocks;	/* number of blocks in this log */
56 	uint64_t sls_mscount;	/* # of metaslabs flushed in the log's txg */
57 	avl_node_t sls_node;	/* node in spa_sm_logs_by_txg */
58 } spa_log_sm_t;
59 
60 int spa_ld_log_spacemaps(spa_t *);
61 
62 void spa_generate_syncing_log_sm(spa_t *, dmu_tx_t *);
63 void spa_flush_metaslabs(spa_t *, dmu_tx_t *);
64 void spa_sync_close_syncing_log_sm(spa_t *);
65 
66 void spa_cleanup_old_sm_logs(spa_t *, dmu_tx_t *);
67 
68 uint64_t spa_log_sm_blocklimit(spa_t *);
69 void spa_log_sm_set_blocklimit(spa_t *);
70 uint64_t spa_log_sm_nblocks(spa_t *);
71 uint64_t spa_log_sm_memused(spa_t *);
72 
73 void spa_log_sm_decrement_mscount(spa_t *, uint64_t);
74 void spa_log_sm_increment_current_mscount(spa_t *);
75 
76 void spa_log_summary_add_flushed_metaslab(spa_t *);
77 void spa_log_summary_decrement_mscount(spa_t *, uint64_t);
78 void spa_log_summary_decrement_blkcount(spa_t *, uint64_t);
79 
80 boolean_t spa_flush_all_logs_requested(spa_t *);
81 
82 extern int zfs_keep_log_spacemaps_at_export;
83 
84 #endif /* _SYS_SPA_LOG_SPACEMAP_H */
85