561 lines
19 KiB
C
561 lines
19 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2017, Intel Corporation.
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*/
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#ifndef _SYS_VDEV_IMPL_H
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#define _SYS_VDEV_IMPL_H
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#include <sys/avl.h>
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#include <sys/bpobj.h>
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#include <sys/dmu.h>
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#include <sys/metaslab.h>
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#include <sys/nvpair.h>
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#include <sys/space_map.h>
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#include <sys/vdev.h>
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#include <sys/dkio.h>
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#include <sys/uberblock_impl.h>
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#include <sys/vdev_indirect_mapping.h>
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#include <sys/vdev_indirect_births.h>
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#include <sys/vdev_removal.h>
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#include <sys/zfs_ratelimit.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Virtual device descriptors.
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*
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* All storage pool operations go through the virtual device framework,
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* which provides data replication and I/O scheduling.
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*/
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/*
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* Forward declarations that lots of things need.
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*/
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typedef struct vdev_queue vdev_queue_t;
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typedef struct vdev_cache vdev_cache_t;
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typedef struct vdev_cache_entry vdev_cache_entry_t;
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struct abd;
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extern int zfs_vdev_queue_depth_pct;
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extern int zfs_vdev_def_queue_depth;
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extern uint32_t zfs_vdev_async_write_max_active;
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/*
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* Virtual device operations
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*/
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typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *max_size,
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uint64_t *ashift);
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typedef void vdev_close_func_t(vdev_t *vd);
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typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize);
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typedef void vdev_io_start_func_t(zio_t *zio);
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typedef void vdev_io_done_func_t(zio_t *zio);
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typedef void vdev_state_change_func_t(vdev_t *vd, int, int);
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typedef boolean_t vdev_need_resilver_func_t(vdev_t *vd, uint64_t, size_t);
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typedef void vdev_hold_func_t(vdev_t *vd);
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typedef void vdev_rele_func_t(vdev_t *vd);
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typedef void vdev_remap_cb_t(uint64_t inner_offset, vdev_t *vd,
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uint64_t offset, uint64_t size, void *arg);
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typedef void vdev_remap_func_t(vdev_t *vd, uint64_t offset, uint64_t size,
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vdev_remap_cb_t callback, void *arg);
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/*
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* Given a target vdev, translates the logical range "in" to the physical
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* range "res"
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*/
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typedef void vdev_xlation_func_t(vdev_t *cvd, const range_seg_t *in,
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range_seg_t *res);
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typedef const struct vdev_ops {
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vdev_open_func_t *vdev_op_open;
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vdev_close_func_t *vdev_op_close;
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vdev_asize_func_t *vdev_op_asize;
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vdev_io_start_func_t *vdev_op_io_start;
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vdev_io_done_func_t *vdev_op_io_done;
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vdev_state_change_func_t *vdev_op_state_change;
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vdev_need_resilver_func_t *vdev_op_need_resilver;
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vdev_hold_func_t *vdev_op_hold;
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vdev_rele_func_t *vdev_op_rele;
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vdev_remap_func_t *vdev_op_remap;
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/*
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* For translating ranges from non-leaf vdevs (e.g. raidz) to leaves.
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* Used when initializing vdevs. Isn't used by leaf ops.
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*/
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vdev_xlation_func_t *vdev_op_xlate;
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char vdev_op_type[16];
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boolean_t vdev_op_leaf;
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} vdev_ops_t;
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/*
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* Virtual device properties
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*/
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struct vdev_cache_entry {
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struct abd *ve_abd;
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uint64_t ve_offset;
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clock_t ve_lastused;
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avl_node_t ve_offset_node;
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avl_node_t ve_lastused_node;
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uint32_t ve_hits;
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uint16_t ve_missed_update;
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zio_t *ve_fill_io;
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};
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struct vdev_cache {
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avl_tree_t vc_offset_tree;
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avl_tree_t vc_lastused_tree;
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kmutex_t vc_lock;
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};
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typedef struct vdev_queue_class {
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uint32_t vqc_active;
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/*
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* Sorted by offset or timestamp, depending on if the queue is
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* LBA-ordered vs FIFO.
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*/
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avl_tree_t vqc_queued_tree;
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} vdev_queue_class_t;
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struct vdev_queue {
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vdev_t *vq_vdev;
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vdev_queue_class_t vq_class[ZIO_PRIORITY_NUM_QUEUEABLE];
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avl_tree_t vq_active_tree;
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avl_tree_t vq_read_offset_tree;
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avl_tree_t vq_write_offset_tree;
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avl_tree_t vq_trim_offset_tree;
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uint64_t vq_last_offset;
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hrtime_t vq_io_complete_ts; /* time last i/o completed */
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hrtime_t vq_io_delta_ts;
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zio_t vq_io_search; /* used as local for stack reduction */
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kmutex_t vq_lock;
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};
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typedef enum vdev_alloc_bias {
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VDEV_BIAS_NONE,
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VDEV_BIAS_LOG, /* dedicated to ZIL data (SLOG) */
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VDEV_BIAS_SPECIAL, /* dedicated to ddt, metadata, and small blks */
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VDEV_BIAS_DEDUP /* dedicated to dedup metadata */
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} vdev_alloc_bias_t;
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/*
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* On-disk indirect vdev state.
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*
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* An indirect vdev is described exclusively in the MOS config of a pool.
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* The config for an indirect vdev includes several fields, which are
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* accessed in memory by a vdev_indirect_config_t.
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*/
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typedef struct vdev_indirect_config {
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/*
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* Object (in MOS) which contains the indirect mapping. This object
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* contains an array of vdev_indirect_mapping_entry_phys_t ordered by
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* vimep_src. The bonus buffer for this object is a
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* vdev_indirect_mapping_phys_t. This object is allocated when a vdev
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* removal is initiated.
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*
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* Note that this object can be empty if none of the data on the vdev
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* has been copied yet.
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*/
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uint64_t vic_mapping_object;
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/*
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* Object (in MOS) which contains the birth times for the mapping
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* entries. This object contains an array of
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* vdev_indirect_birth_entry_phys_t sorted by vibe_offset. The bonus
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* buffer for this object is a vdev_indirect_birth_phys_t. This object
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* is allocated when a vdev removal is initiated.
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*
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* Note that this object can be empty if none of the vdev has yet been
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* copied.
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*/
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uint64_t vic_births_object;
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/*
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* This is the vdev ID which was removed previous to this vdev, or
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* UINT64_MAX if there are no previously removed vdevs.
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*/
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uint64_t vic_prev_indirect_vdev;
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} vdev_indirect_config_t;
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/*
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* Virtual device descriptor
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*/
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struct vdev {
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/*
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* Common to all vdev types.
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*/
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uint64_t vdev_id; /* child number in vdev parent */
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uint64_t vdev_guid; /* unique ID for this vdev */
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uint64_t vdev_guid_sum; /* self guid + all child guids */
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uint64_t vdev_orig_guid; /* orig. guid prior to remove */
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uint64_t vdev_asize; /* allocatable device capacity */
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uint64_t vdev_min_asize; /* min acceptable asize */
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uint64_t vdev_max_asize; /* max acceptable asize */
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uint64_t vdev_ashift; /* block alignment shift */
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uint64_t vdev_state; /* see VDEV_STATE_* #defines */
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uint64_t vdev_prevstate; /* used when reopening a vdev */
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vdev_ops_t *vdev_ops; /* vdev operations */
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spa_t *vdev_spa; /* spa for this vdev */
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void *vdev_tsd; /* type-specific data */
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vnode_t *vdev_name_vp; /* vnode for pathname */
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vnode_t *vdev_devid_vp; /* vnode for devid */
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vdev_t *vdev_top; /* top-level vdev */
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vdev_t *vdev_parent; /* parent vdev */
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vdev_t **vdev_child; /* array of children */
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uint64_t vdev_children; /* number of children */
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vdev_stat_t vdev_stat; /* virtual device statistics */
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vdev_stat_ex_t vdev_stat_ex; /* extended statistics */
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boolean_t vdev_expanding; /* expand the vdev? */
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boolean_t vdev_reopening; /* reopen in progress? */
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boolean_t vdev_nonrot; /* true if solid state */
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int vdev_open_error; /* error on last open */
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kthread_t *vdev_open_thread; /* thread opening children */
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uint64_t vdev_crtxg; /* txg when top-level was added */
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/*
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* Top-level vdev state.
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*/
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uint64_t vdev_ms_array; /* metaslab array object */
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uint64_t vdev_ms_shift; /* metaslab size shift */
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uint64_t vdev_ms_count; /* number of metaslabs */
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metaslab_group_t *vdev_mg; /* metaslab group */
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metaslab_t **vdev_ms; /* metaslab array */
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uint64_t vdev_pending_fastwrite; /* allocated fastwrites */
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txg_list_t vdev_ms_list; /* per-txg dirty metaslab lists */
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txg_list_t vdev_dtl_list; /* per-txg dirty DTL lists */
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txg_node_t vdev_txg_node; /* per-txg dirty vdev linkage */
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boolean_t vdev_remove_wanted; /* async remove wanted? */
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boolean_t vdev_probe_wanted; /* async probe wanted? */
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list_node_t vdev_config_dirty_node; /* config dirty list */
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list_node_t vdev_state_dirty_node; /* state dirty list */
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uint64_t vdev_deflate_ratio; /* deflation ratio (x512) */
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uint64_t vdev_islog; /* is an intent log device */
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uint64_t vdev_removing; /* device is being removed? */
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boolean_t vdev_ishole; /* is a hole in the namespace */
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uint64_t vdev_top_zap;
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vdev_alloc_bias_t vdev_alloc_bias; /* metaslab allocation bias */
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/* pool checkpoint related */
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space_map_t *vdev_checkpoint_sm; /* contains reserved blocks */
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/* Initialize related */
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boolean_t vdev_initialize_exit_wanted;
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vdev_initializing_state_t vdev_initialize_state;
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list_node_t vdev_initialize_node;
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kthread_t *vdev_initialize_thread;
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/* Protects vdev_initialize_thread and vdev_initialize_state. */
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kmutex_t vdev_initialize_lock;
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kcondvar_t vdev_initialize_cv;
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uint64_t vdev_initialize_offset[TXG_SIZE];
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uint64_t vdev_initialize_last_offset;
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range_tree_t *vdev_initialize_tree; /* valid while initializing */
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uint64_t vdev_initialize_bytes_est;
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uint64_t vdev_initialize_bytes_done;
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time_t vdev_initialize_action_time; /* start and end time */
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/* TRIM related */
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boolean_t vdev_trim_exit_wanted;
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boolean_t vdev_autotrim_exit_wanted;
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vdev_trim_state_t vdev_trim_state;
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list_node_t vdev_trim_node;
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kmutex_t vdev_autotrim_lock;
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kcondvar_t vdev_autotrim_cv;
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kthread_t *vdev_autotrim_thread;
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/* Protects vdev_trim_thread and vdev_trim_state. */
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kmutex_t vdev_trim_lock;
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kcondvar_t vdev_trim_cv;
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kthread_t *vdev_trim_thread;
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uint64_t vdev_trim_offset[TXG_SIZE];
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uint64_t vdev_trim_last_offset;
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uint64_t vdev_trim_bytes_est;
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uint64_t vdev_trim_bytes_done;
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uint64_t vdev_trim_rate; /* requested rate (bytes/sec) */
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uint64_t vdev_trim_partial; /* requested partial TRIM */
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uint64_t vdev_trim_secure; /* requested secure TRIM */
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time_t vdev_trim_action_time; /* start and end time */
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/* for limiting outstanding I/Os (initialize and TRIM) */
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kmutex_t vdev_initialize_io_lock;
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kcondvar_t vdev_initialize_io_cv;
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uint64_t vdev_initialize_inflight;
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kmutex_t vdev_trim_io_lock;
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kcondvar_t vdev_trim_io_cv;
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uint64_t vdev_trim_inflight[2];
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/*
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* Values stored in the config for an indirect or removing vdev.
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*/
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vdev_indirect_config_t vdev_indirect_config;
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/*
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* The vdev_indirect_rwlock protects the vdev_indirect_mapping
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* pointer from changing on indirect vdevs (when it is condensed).
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* Note that removing (not yet indirect) vdevs have different
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* access patterns (the mapping is not accessed from open context,
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* e.g. from zio_read) and locking strategy (e.g. svr_lock).
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*/
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krwlock_t vdev_indirect_rwlock;
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vdev_indirect_mapping_t *vdev_indirect_mapping;
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vdev_indirect_births_t *vdev_indirect_births;
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/*
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* In memory data structures used to manage the obsolete sm, for
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* indirect or removing vdevs.
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*
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* The vdev_obsolete_segments is the in-core record of the segments
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* that are no longer referenced anywhere in the pool (due to
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* being freed or remapped and not referenced by any snapshots).
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* During a sync, segments are added to vdev_obsolete_segments
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* via vdev_indirect_mark_obsolete(); at the end of each sync
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* pass, this is appended to vdev_obsolete_sm via
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* vdev_indirect_sync_obsolete(). The vdev_obsolete_lock
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* protects against concurrent modifications of vdev_obsolete_segments
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* from multiple zio threads.
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*/
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kmutex_t vdev_obsolete_lock;
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range_tree_t *vdev_obsolete_segments;
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space_map_t *vdev_obsolete_sm;
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/*
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* Protects the vdev_scan_io_queue field itself as well as the
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* structure's contents (when present).
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*/
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kmutex_t vdev_scan_io_queue_lock;
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struct dsl_scan_io_queue *vdev_scan_io_queue;
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/*
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* Leaf vdev state.
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*/
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range_tree_t *vdev_dtl[DTL_TYPES]; /* dirty time logs */
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space_map_t *vdev_dtl_sm; /* dirty time log space map */
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txg_node_t vdev_dtl_node; /* per-txg dirty DTL linkage */
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uint64_t vdev_dtl_object; /* DTL object */
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uint64_t vdev_psize; /* physical device capacity */
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uint64_t vdev_wholedisk; /* true if this is a whole disk */
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uint64_t vdev_offline; /* persistent offline state */
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uint64_t vdev_faulted; /* persistent faulted state */
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uint64_t vdev_degraded; /* persistent degraded state */
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uint64_t vdev_removed; /* persistent removed state */
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uint64_t vdev_resilver_txg; /* persistent resilvering state */
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uint64_t vdev_nparity; /* number of parity devices for raidz */
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char *vdev_path; /* vdev path (if any) */
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char *vdev_devid; /* vdev devid (if any) */
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char *vdev_physpath; /* vdev device path (if any) */
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char *vdev_enc_sysfs_path; /* enclosure sysfs path */
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char *vdev_fru; /* physical FRU location */
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uint64_t vdev_not_present; /* not present during import */
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uint64_t vdev_unspare; /* unspare when resilvering done */
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boolean_t vdev_nowritecache; /* true if flushwritecache failed */
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boolean_t vdev_has_trim; /* TRIM is supported */
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boolean_t vdev_has_securetrim; /* secure TRIM is supported */
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boolean_t vdev_checkremove; /* temporary online test */
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boolean_t vdev_forcefault; /* force online fault */
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boolean_t vdev_splitting; /* split or repair in progress */
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boolean_t vdev_delayed_close; /* delayed device close? */
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boolean_t vdev_tmpoffline; /* device taken offline temporarily? */
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boolean_t vdev_detached; /* device detached? */
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boolean_t vdev_cant_read; /* vdev is failing all reads */
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boolean_t vdev_cant_write; /* vdev is failing all writes */
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boolean_t vdev_isspare; /* was a hot spare */
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boolean_t vdev_isl2cache; /* was a l2cache device */
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boolean_t vdev_copy_uberblocks; /* post expand copy uberblocks */
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boolean_t vdev_resilver_deferred; /* resilver deferred */
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vdev_queue_t vdev_queue; /* I/O deadline schedule queue */
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vdev_cache_t vdev_cache; /* physical block cache */
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spa_aux_vdev_t *vdev_aux; /* for l2cache and spares vdevs */
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zio_t *vdev_probe_zio; /* root of current probe */
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vdev_aux_t vdev_label_aux; /* on-disk aux state */
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uint64_t vdev_leaf_zap;
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hrtime_t vdev_mmp_pending; /* 0 if write finished */
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uint64_t vdev_mmp_kstat_id; /* to find kstat entry */
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uint64_t vdev_expansion_time; /* vdev's last expansion time */
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list_node_t vdev_leaf_node; /* leaf vdev list */
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/*
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* For DTrace to work in userland (libzpool) context, these fields must
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* remain at the end of the structure. DTrace will use the kernel's
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* CTF definition for 'struct vdev', and since the size of a kmutex_t is
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* larger in userland, the offsets for the rest of the fields would be
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* incorrect.
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*/
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kmutex_t vdev_dtl_lock; /* vdev_dtl_{map,resilver} */
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kmutex_t vdev_stat_lock; /* vdev_stat */
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kmutex_t vdev_probe_lock; /* protects vdev_probe_zio */
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/*
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* We rate limit ZIO delay and ZIO checksum events, since they
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* can flood ZED with tons of events when a drive is acting up.
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*/
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zfs_ratelimit_t vdev_delay_rl;
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zfs_ratelimit_t vdev_checksum_rl;
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};
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#define VDEV_RAIDZ_MAXPARITY 3
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#define VDEV_PAD_SIZE (8 << 10)
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/* 2 padding areas (vl_pad1 and vl_pad2) to skip */
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#define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2
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#define VDEV_PHYS_SIZE (112 << 10)
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#define VDEV_UBERBLOCK_RING (128 << 10)
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/*
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* MMP blocks occupy the last MMP_BLOCKS_PER_LABEL slots in the uberblock
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* ring when MMP is enabled.
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*/
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#define MMP_BLOCKS_PER_LABEL 1
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/* The largest uberblock we support is 8k. */
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#define MAX_UBERBLOCK_SHIFT (13)
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#define VDEV_UBERBLOCK_SHIFT(vd) \
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MIN(MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT), \
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MAX_UBERBLOCK_SHIFT)
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#define VDEV_UBERBLOCK_COUNT(vd) \
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(VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd))
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#define VDEV_UBERBLOCK_OFFSET(vd, n) \
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offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)])
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#define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd))
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typedef struct vdev_phys {
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char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)];
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zio_eck_t vp_zbt;
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} vdev_phys_t;
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typedef struct vdev_label {
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char vl_pad1[VDEV_PAD_SIZE]; /* 8K */
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char vl_pad2[VDEV_PAD_SIZE]; /* 8K */
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vdev_phys_t vl_vdev_phys; /* 112K */
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char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
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} vdev_label_t; /* 256K total */
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/*
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* vdev_dirty() flags
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*/
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#define VDD_METASLAB 0x01
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#define VDD_DTL 0x02
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/* Offset of embedded boot loader region on each label */
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#define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t))
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/*
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* Size of embedded boot loader region on each label.
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* The total size of the first two labels plus the boot area is 4MB.
|
|
*/
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#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
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|
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/*
|
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* Size of label regions at the start and end of each leaf device.
|
|
*/
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#define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
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#define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t))
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#define VDEV_LABELS 4
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#define VDEV_BEST_LABEL VDEV_LABELS
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#define VDEV_ALLOC_LOAD 0
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#define VDEV_ALLOC_ADD 1
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#define VDEV_ALLOC_SPARE 2
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#define VDEV_ALLOC_L2CACHE 3
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|
#define VDEV_ALLOC_ROOTPOOL 4
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|
#define VDEV_ALLOC_SPLIT 5
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#define VDEV_ALLOC_ATTACH 6
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|
|
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/*
|
|
* Allocate or free a vdev
|
|
*/
|
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extern vdev_t *vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid,
|
|
vdev_ops_t *ops);
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|
extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config,
|
|
vdev_t *parent, uint_t id, int alloctype);
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|
extern void vdev_free(vdev_t *vd);
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|
|
|
/*
|
|
* Add or remove children and parents
|
|
*/
|
|
extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd);
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|
extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd);
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|
extern void vdev_compact_children(vdev_t *pvd);
|
|
extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops);
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|
extern void vdev_remove_parent(vdev_t *cvd);
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|
|
|
/*
|
|
* vdev sync load and sync
|
|
*/
|
|
extern boolean_t vdev_log_state_valid(vdev_t *vd);
|
|
extern int vdev_load(vdev_t *vd);
|
|
extern int vdev_dtl_load(vdev_t *vd);
|
|
extern void vdev_sync(vdev_t *vd, uint64_t txg);
|
|
extern void vdev_sync_done(vdev_t *vd, uint64_t txg);
|
|
extern void vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg);
|
|
extern void vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg);
|
|
|
|
/*
|
|
* Available vdev types.
|
|
*/
|
|
extern vdev_ops_t vdev_root_ops;
|
|
extern vdev_ops_t vdev_mirror_ops;
|
|
extern vdev_ops_t vdev_replacing_ops;
|
|
extern vdev_ops_t vdev_raidz_ops;
|
|
extern vdev_ops_t vdev_disk_ops;
|
|
extern vdev_ops_t vdev_file_ops;
|
|
extern vdev_ops_t vdev_missing_ops;
|
|
extern vdev_ops_t vdev_hole_ops;
|
|
extern vdev_ops_t vdev_spare_ops;
|
|
extern vdev_ops_t vdev_indirect_ops;
|
|
|
|
/*
|
|
* Common size functions
|
|
*/
|
|
extern void vdev_default_xlate(vdev_t *vd, const range_seg_t *in,
|
|
range_seg_t *out);
|
|
extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize);
|
|
extern uint64_t vdev_get_min_asize(vdev_t *vd);
|
|
extern void vdev_set_min_asize(vdev_t *vd);
|
|
|
|
/*
|
|
* Global variables
|
|
*/
|
|
extern int vdev_standard_sm_blksz;
|
|
/* zdb uses this tunable, so it must be declared here to make lint happy. */
|
|
extern int zfs_vdev_cache_size;
|
|
|
|
/*
|
|
* Functions from vdev_indirect.c
|
|
*/
|
|
extern void vdev_indirect_sync_obsolete(vdev_t *vd, dmu_tx_t *tx);
|
|
extern boolean_t vdev_indirect_should_condense(vdev_t *vd);
|
|
extern void spa_condense_indirect_start_sync(vdev_t *vd, dmu_tx_t *tx);
|
|
extern int vdev_obsolete_sm_object(vdev_t *vd, uint64_t *sm_obj);
|
|
extern int vdev_obsolete_counts_are_precise(vdev_t *vd, boolean_t *are_precise);
|
|
|
|
/*
|
|
* Other miscellaneous functions
|
|
*/
|
|
int vdev_checkpoint_sm_object(vdev_t *vd, uint64_t *sm_obj);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_VDEV_IMPL_H */
|