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Diffstat (limited to 'module/zfs/include/sys/metaslab_impl.h')
| -rw-r--r-- | module/zfs/include/sys/metaslab_impl.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/module/zfs/include/sys/metaslab_impl.h b/module/zfs/include/sys/metaslab_impl.h new file mode 100644 index 000000000..5980cbc84 --- /dev/null +++ b/module/zfs/include/sys/metaslab_impl.h @@ -0,0 +1,81 @@ +/* + * 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 2006 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_METASLAB_IMPL_H +#define _SYS_METASLAB_IMPL_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/metaslab.h> +#include <sys/space_map.h> +#include <sys/vdev.h> +#include <sys/txg.h> +#include <sys/avl.h> + +#ifdef __cplusplus +extern "C" { +#endif + +struct metaslab_class { + metaslab_group_t *mc_rotor; + uint64_t mc_allocated; +}; + +struct metaslab_group { + kmutex_t mg_lock; + avl_tree_t mg_metaslab_tree; + uint64_t mg_aliquot; + int64_t mg_bias; + metaslab_class_t *mg_class; + vdev_t *mg_vd; + metaslab_group_t *mg_prev; + metaslab_group_t *mg_next; +}; + +/* + * Each metaslab's free space is tracked in space map object in the MOS, + * which is only updated in syncing context. Each time we sync a txg, + * we append the allocs and frees from that txg to the space map object. + * When the txg is done syncing, metaslab_sync_done() updates ms_smo + * to ms_smo_syncing. Everything in ms_smo is always safe to allocate. + */ +struct metaslab { + kmutex_t ms_lock; /* metaslab lock */ + space_map_obj_t ms_smo; /* synced space map object */ + space_map_obj_t ms_smo_syncing; /* syncing space map object */ + space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */ + space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */ + space_map_t ms_map; /* in-core free space map */ + uint64_t ms_weight; /* weight vs. others in group */ + metaslab_group_t *ms_group; /* metaslab group */ + avl_node_t ms_group_node; /* node in metaslab group tree */ + txg_node_t ms_txg_node; /* per-txg dirty metaslab links */ +}; + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_METASLAB_IMPL_H */ |