307 lines
9.7 KiB
C
307 lines
9.7 KiB
C
|
/*
|
||
|
|
* 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 2007 Sun Microsystems, Inc. All rights reserved.
|
||
|
|
* Use is subject to license terms.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _SYS_VDEV_IMPL_H
|
||
|
|
#define _SYS_VDEV_IMPL_H
|
||
|
|
|
||
|
|
#pragma ident "@(#)vdev_impl.h 1.19 07/11/27 SMI"
|
||
|
|
|
||
|
|
#include <sys/avl.h>
|
||
|
|
#include <sys/dmu.h>
|
||
|
|
#include <sys/metaslab.h>
|
||
|
|
#include <sys/nvpair.h>
|
||
|
|
#include <sys/space_map.h>
|
||
|
|
#include <sys/vdev.h>
|
||
|
|
#include <sys/dkio.h>
|
||
|
|
#include <sys/uberblock_impl.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Virtual device descriptors.
|
||
|
|
*
|
||
|
|
* All storage pool operations go through the virtual device framework,
|
||
|
|
* which provides data replication and I/O scheduling.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Forward declarations that lots of things need.
|
||
|
|
*/
|
||
|
|
typedef struct vdev_queue vdev_queue_t;
|
||
|
|
typedef struct vdev_cache vdev_cache_t;
|
||
|
|
typedef struct vdev_cache_entry vdev_cache_entry_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Virtual device operations
|
||
|
|
*/
|
||
|
|
typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *ashift);
|
||
|
|
typedef void vdev_close_func_t(vdev_t *vd);
|
||
|
|
typedef int vdev_probe_func_t(vdev_t *vd);
|
||
|
|
typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize);
|
||
|
|
typedef int vdev_io_start_func_t(zio_t *zio);
|
||
|
|
typedef int vdev_io_done_func_t(zio_t *zio);
|
||
|
|
typedef void vdev_state_change_func_t(vdev_t *vd, int, int);
|
||
|
|
|
||
|
|
typedef struct vdev_ops {
|
||
|
|
vdev_open_func_t *vdev_op_open;
|
||
|
|
vdev_close_func_t *vdev_op_close;
|
||
|
|
vdev_probe_func_t *vdev_op_probe;
|
||
|
|
vdev_asize_func_t *vdev_op_asize;
|
||
|
|
vdev_io_start_func_t *vdev_op_io_start;
|
||
|
|
vdev_io_done_func_t *vdev_op_io_done;
|
||
|
|
vdev_state_change_func_t *vdev_op_state_change;
|
||
|
|
char vdev_op_type[16];
|
||
|
|
boolean_t vdev_op_leaf;
|
||
|
|
} vdev_ops_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Virtual device properties
|
||
|
|
*/
|
||
|
|
struct vdev_cache_entry {
|
||
|
|
char *ve_data;
|
||
|
|
uint64_t ve_offset;
|
||
|
|
uint64_t ve_lastused;
|
||
|
|
avl_node_t ve_offset_node;
|
||
|
|
avl_node_t ve_lastused_node;
|
||
|
|
uint32_t ve_hits;
|
||
|
|
uint16_t ve_missed_update;
|
||
|
|
zio_t *ve_fill_io;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct vdev_cache {
|
||
|
|
avl_tree_t vc_offset_tree;
|
||
|
|
avl_tree_t vc_lastused_tree;
|
||
|
|
kmutex_t vc_lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct vdev_queue {
|
||
|
|
avl_tree_t vq_deadline_tree;
|
||
|
|
avl_tree_t vq_read_tree;
|
||
|
|
avl_tree_t vq_write_tree;
|
||
|
|
avl_tree_t vq_pending_tree;
|
||
|
|
kmutex_t vq_lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Virtual device descriptor
|
||
|
|
*/
|
||
|
|
struct vdev {
|
||
|
|
/*
|
||
|
|
* Common to all vdev types.
|
||
|
|
*/
|
||
|
|
uint64_t vdev_id; /* child number in vdev parent */
|
||
|
|
uint64_t vdev_guid; /* unique ID for this vdev */
|
||
|
|
uint64_t vdev_guid_sum; /* self guid + all child guids */
|
||
|
|
uint64_t vdev_asize; /* allocatable device capacity */
|
||
|
|
uint64_t vdev_ashift; /* block alignment shift */
|
||
|
|
uint64_t vdev_state; /* see VDEV_STATE_* #defines */
|
||
|
|
uint64_t vdev_prevstate; /* used when reopening a vdev */
|
||
|
|
vdev_ops_t *vdev_ops; /* vdev operations */
|
||
|
|
spa_t *vdev_spa; /* spa for this vdev */
|
||
|
|
void *vdev_tsd; /* type-specific data */
|
||
|
|
vdev_t *vdev_top; /* top-level vdev */
|
||
|
|
vdev_t *vdev_parent; /* parent vdev */
|
||
|
|
vdev_t **vdev_child; /* array of children */
|
||
|
|
uint64_t vdev_children; /* number of children */
|
||
|
|
space_map_t vdev_dtl_map; /* dirty time log in-core state */
|
||
|
|
space_map_t vdev_dtl_scrub; /* DTL for scrub repair writes */
|
||
|
|
vdev_stat_t vdev_stat; /* virtual device statistics */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Top-level vdev state.
|
||
|
|
*/
|
||
|
|
uint64_t vdev_ms_array; /* metaslab array object */
|
||
|
|
uint64_t vdev_ms_shift; /* metaslab size shift */
|
||
|
|
uint64_t vdev_ms_count; /* number of metaslabs */
|
||
|
|
metaslab_group_t *vdev_mg; /* metaslab group */
|
||
|
|
metaslab_t **vdev_ms; /* metaslab array */
|
||
|
|
txg_list_t vdev_ms_list; /* per-txg dirty metaslab lists */
|
||
|
|
txg_list_t vdev_dtl_list; /* per-txg dirty DTL lists */
|
||
|
|
txg_node_t vdev_txg_node; /* per-txg dirty vdev linkage */
|
||
|
|
boolean_t vdev_remove_wanted; /* async remove wanted? */
|
||
|
|
list_node_t vdev_dirty_node; /* config dirty list */
|
||
|
|
uint64_t vdev_deflate_ratio; /* deflation ratio (x512) */
|
||
|
|
uint64_t vdev_islog; /* is an intent log device */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Leaf vdev state.
|
||
|
|
*/
|
||
|
|
uint64_t vdev_psize; /* physical device capacity */
|
||
|
|
space_map_obj_t vdev_dtl; /* dirty time log on-disk state */
|
||
|
|
txg_node_t vdev_dtl_node; /* per-txg dirty DTL linkage */
|
||
|
|
uint64_t vdev_wholedisk; /* true if this is a whole disk */
|
||
|
|
uint64_t vdev_offline; /* persistent offline state */
|
||
|
|
uint64_t vdev_faulted; /* persistent faulted state */
|
||
|
|
uint64_t vdev_degraded; /* persistent degraded state */
|
||
|
|
uint64_t vdev_removed; /* persistent removed state */
|
||
|
|
uint64_t vdev_nparity; /* number of parity devices for raidz */
|
||
|
|
char *vdev_path; /* vdev path (if any) */
|
||
|
|
char *vdev_devid; /* vdev devid (if any) */
|
||
|
|
char *vdev_physpath; /* vdev device path (if any) */
|
||
|
|
uint64_t vdev_fault_arg; /* fault injection paramater */
|
||
|
|
int vdev_fault_mask; /* zio types to fault */
|
||
|
|
uint8_t vdev_fault_mode; /* fault injection mode */
|
||
|
|
uint8_t vdev_tmpoffline; /* device taken offline temporarily? */
|
||
|
|
uint8_t vdev_detached; /* device detached? */
|
||
|
|
uint64_t vdev_isspare; /* was a hot spare */
|
||
|
|
uint64_t vdev_isl2cache; /* was a l2cache device */
|
||
|
|
vdev_queue_t vdev_queue; /* I/O deadline schedule queue */
|
||
|
|
vdev_cache_t vdev_cache; /* physical block cache */
|
||
|
|
uint64_t vdev_not_present; /* not present during import */
|
||
|
|
hrtime_t vdev_last_try; /* last reopen time */
|
||
|
|
boolean_t vdev_nowritecache; /* true if flushwritecache failed */
|
||
|
|
uint64_t vdev_unspare; /* unspare when resilvering done */
|
||
|
|
boolean_t vdev_checkremove; /* temporary online test */
|
||
|
|
boolean_t vdev_forcefault; /* force online fault */
|
||
|
|
boolean_t vdev_is_failing; /* device errors seen */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For DTrace to work in userland (libzpool) context, these fields must
|
||
|
|
* remain at the end of the structure. DTrace will use the kernel's
|
||
|
|
* CTF definition for 'struct vdev', and since the size of a kmutex_t is
|
||
|
|
* larger in userland, the offsets for the rest fields would be
|
||
|
|
* incorrect.
|
||
|
|
*/
|
||
|
|
kmutex_t vdev_dtl_lock; /* vdev_dtl_{map,resilver} */
|
||
|
|
kmutex_t vdev_stat_lock; /* vdev_stat */
|
||
|
|
};
|
||
|
|
|
||
|
|
#define VDEV_SKIP_SIZE (8 << 10)
|
||
|
|
#define VDEV_BOOT_HEADER_SIZE (8 << 10)
|
||
|
|
#define VDEV_PHYS_SIZE (112 << 10)
|
||
|
|
#define VDEV_UBERBLOCK_RING (128 << 10)
|
||
|
|
|
||
|
|
#define VDEV_UBERBLOCK_SHIFT(vd) \
|
||
|
|
MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT)
|
||
|
|
#define VDEV_UBERBLOCK_COUNT(vd) \
|
||
|
|
(VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd))
|
||
|
|
#define VDEV_UBERBLOCK_OFFSET(vd, n) \
|
||
|
|
offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)])
|
||
|
|
#define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd))
|
||
|
|
|
||
|
|
/* ZFS boot block */
|
||
|
|
#define VDEV_BOOT_MAGIC 0x2f5b007b10cULL
|
||
|
|
#define VDEV_BOOT_VERSION 1 /* version number */
|
||
|
|
|
||
|
|
typedef struct vdev_boot_header {
|
||
|
|
uint64_t vb_magic; /* VDEV_BOOT_MAGIC */
|
||
|
|
uint64_t vb_version; /* VDEV_BOOT_VERSION */
|
||
|
|
uint64_t vb_offset; /* start offset (bytes) */
|
||
|
|
uint64_t vb_size; /* size (bytes) */
|
||
|
|
char vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof (uint64_t)];
|
||
|
|
} vdev_boot_header_t;
|
||
|
|
|
||
|
|
typedef struct vdev_phys {
|
||
|
|
char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_block_tail_t)];
|
||
|
|
zio_block_tail_t vp_zbt;
|
||
|
|
} vdev_phys_t;
|
||
|
|
|
||
|
|
typedef struct vdev_label {
|
||
|
|
char vl_pad[VDEV_SKIP_SIZE]; /* 8K */
|
||
|
|
vdev_boot_header_t vl_boot_header; /* 8K */
|
||
|
|
vdev_phys_t vl_vdev_phys; /* 112K */
|
||
|
|
char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
|
||
|
|
} vdev_label_t; /* 256K total */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* vdev_dirty() flags
|
||
|
|
*/
|
||
|
|
#define VDD_METASLAB 0x01
|
||
|
|
#define VDD_DTL 0x02
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Size and offset of embedded boot loader region on each label.
|
||
|
|
* The total size of the first two labels plus the boot area is 4MB.
|
||
|
|
*/
|
||
|
|
#define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t))
|
||
|
|
#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Size of label regions at the start and end of each leaf device.
|
||
|
|
*/
|
||
|
|
#define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
|
||
|
|
#define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t))
|
||
|
|
#define VDEV_LABELS 4
|
||
|
|
|
||
|
|
#define VDEV_ALLOC_LOAD 0
|
||
|
|
#define VDEV_ALLOC_ADD 1
|
||
|
|
#define VDEV_ALLOC_SPARE 2
|
||
|
|
#define VDEV_ALLOC_L2CACHE 3
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allocate or free a vdev
|
||
|
|
*/
|
||
|
|
extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config,
|
||
|
|
vdev_t *parent, uint_t id, int alloctype);
|
||
|
|
extern void vdev_free(vdev_t *vd);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Add or remove children and parents
|
||
|
|
*/
|
||
|
|
extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd);
|
||
|
|
extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd);
|
||
|
|
extern void vdev_compact_children(vdev_t *pvd);
|
||
|
|
extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops);
|
||
|
|
extern void vdev_remove_parent(vdev_t *cvd);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* vdev sync load and sync
|
||
|
|
*/
|
||
|
|
extern void vdev_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);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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_spare_ops;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Common size functions
|
||
|
|
*/
|
||
|
|
extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize);
|
||
|
|
extern uint64_t vdev_get_rsize(vdev_t *vd);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* zdb uses this tunable, so it must be declared here to make lint happy.
|
||
|
|
*/
|
||
|
|
extern int zfs_vdev_cache_size;
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _SYS_VDEV_IMPL_H */
|