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mirror_zfs/include/sys/zio.h
Don Brady 4f07282786
Avoid posting duplicate zpool events 
Duplicate io and checksum ereport events can misrepresent that 
things are worse than they seem. Ideally the zpool events and the 
corresponding vdev stat error counts in a zpool status should be 
for unique errors -- not the same error being counted over and over. 
This can be demonstrated in a simple example. With a single bad 
block in a datafile and just 5 reads of the file we end up with a 
degraded vdev, even though there is only one unique error in the pool.

The proposed solution to the above issue, is to eliminate duplicates 
when posting events and when updating vdev error stats. We now save 
recent error events of interest when posting events so that we can 
easily check for duplicates when posting an error. 

Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Don Brady <don.brady@delphix.com>
Closes #10861
2020-09-04 10:34:28 -07:00

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/*
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2012, 2020 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright (c) 2013, Joyent, Inc. All rights reserved.
* Copyright 2016 Toomas Soome <tsoome@me.com>
* Copyright (c) 2019, Allan Jude
* Copyright (c) 2019, Klara Inc.
* Copyright (c) 2019-2020, Michael Niewöhner
*/
#ifndef _ZIO_H
#define _ZIO_H
#include <sys/zio_priority.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/avl.h>
#include <sys/fs/zfs.h>
#include <sys/zio_impl.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Embedded checksum
*/
#define ZEC_MAGIC 0x210da7ab10c7a11ULL
typedef struct zio_eck {
uint64_t zec_magic; /* for validation, endianness */
zio_cksum_t zec_cksum; /* 256-bit checksum */
} zio_eck_t;
/*
* Gang block headers are self-checksumming and contain an array
* of block pointers.
*/
#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
sizeof (zio_eck_t)) / sizeof (blkptr_t))
#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
sizeof (zio_eck_t) - \
(SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
sizeof (uint64_t))
typedef struct zio_gbh {
blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
uint64_t zg_filler[SPA_GBH_FILLER];
zio_eck_t zg_tail;
} zio_gbh_phys_t;
enum zio_checksum {
ZIO_CHECKSUM_INHERIT = 0,
ZIO_CHECKSUM_ON,
ZIO_CHECKSUM_OFF,
ZIO_CHECKSUM_LABEL,
ZIO_CHECKSUM_GANG_HEADER,
ZIO_CHECKSUM_ZILOG,
ZIO_CHECKSUM_FLETCHER_2,
ZIO_CHECKSUM_FLETCHER_4,
ZIO_CHECKSUM_SHA256,
ZIO_CHECKSUM_ZILOG2,
ZIO_CHECKSUM_NOPARITY,
ZIO_CHECKSUM_SHA512,
ZIO_CHECKSUM_SKEIN,
#if !defined(__FreeBSD__)
ZIO_CHECKSUM_EDONR,
#endif
ZIO_CHECKSUM_FUNCTIONS
};
/*
* The number of "legacy" compression functions which can be set on individual
* objects.
*/
#define ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
#define ZIO_CHECKSUM_MASK 0xffULL
#define ZIO_CHECKSUM_VERIFY (1 << 8)
#define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
/* supported encryption algorithms */
enum zio_encrypt {
ZIO_CRYPT_INHERIT = 0,
ZIO_CRYPT_ON,
ZIO_CRYPT_OFF,
ZIO_CRYPT_AES_128_CCM,
ZIO_CRYPT_AES_192_CCM,
ZIO_CRYPT_AES_256_CCM,
ZIO_CRYPT_AES_128_GCM,
ZIO_CRYPT_AES_192_GCM,
ZIO_CRYPT_AES_256_GCM,
ZIO_CRYPT_FUNCTIONS
};
#define ZIO_CRYPT_ON_VALUE ZIO_CRYPT_AES_256_GCM
#define ZIO_CRYPT_DEFAULT ZIO_CRYPT_OFF
/* macros defining encryption lengths */
#define ZIO_OBJSET_MAC_LEN 32
#define ZIO_DATA_IV_LEN 12
#define ZIO_DATA_SALT_LEN 8
#define ZIO_DATA_MAC_LEN 16
/*
* The number of "legacy" compression functions which can be set on individual
* objects.
*/
#define ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
/*
* The meaning of "compress = on" selected by the compression features enabled
* on a given pool.
*/
#define ZIO_COMPRESS_LEGACY_ON_VALUE ZIO_COMPRESS_LZJB
#define ZIO_COMPRESS_LZ4_ON_VALUE ZIO_COMPRESS_LZ4
#define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
#define BOOTFS_COMPRESS_VALID(compress) \
((compress) == ZIO_COMPRESS_LZJB || \
(compress) == ZIO_COMPRESS_LZ4 || \
(compress) == ZIO_COMPRESS_GZIP_1 || \
(compress) == ZIO_COMPRESS_GZIP_2 || \
(compress) == ZIO_COMPRESS_GZIP_3 || \
(compress) == ZIO_COMPRESS_GZIP_4 || \
(compress) == ZIO_COMPRESS_GZIP_5 || \
(compress) == ZIO_COMPRESS_GZIP_6 || \
(compress) == ZIO_COMPRESS_GZIP_7 || \
(compress) == ZIO_COMPRESS_GZIP_8 || \
(compress) == ZIO_COMPRESS_GZIP_9 || \
(compress) == ZIO_COMPRESS_ZLE || \
(compress) == ZIO_COMPRESS_ZSTD || \
(compress) == ZIO_COMPRESS_ON || \
(compress) == ZIO_COMPRESS_OFF)
#define ZIO_COMPRESS_ALGO(x) (x & SPA_COMPRESSMASK)
#define ZIO_COMPRESS_LEVEL(x) ((x & ~SPA_COMPRESSMASK) >> SPA_COMPRESSBITS)
#define ZIO_COMPRESS_RAW(type, level) (type | ((level) << SPA_COMPRESSBITS))
#define ZIO_COMPLEVEL_ZSTD(level) \
ZIO_COMPRESS_RAW(ZIO_COMPRESS_ZSTD, level)
#define ZIO_FAILURE_MODE_WAIT 0
#define ZIO_FAILURE_MODE_CONTINUE 1
#define ZIO_FAILURE_MODE_PANIC 2
typedef enum zio_suspend_reason {
ZIO_SUSPEND_NONE = 0,
ZIO_SUSPEND_IOERR,
ZIO_SUSPEND_MMP,
} zio_suspend_reason_t;
enum zio_flag {
/*
* Flags inherited by gang, ddt, and vdev children,
* and that must be equal for two zios to aggregate
*/
ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
ZIO_FLAG_IO_REPAIR = 1 << 1,
ZIO_FLAG_SELF_HEAL = 1 << 2,
ZIO_FLAG_RESILVER = 1 << 3,
ZIO_FLAG_SCRUB = 1 << 4,
ZIO_FLAG_SCAN_THREAD = 1 << 5,
ZIO_FLAG_PHYSICAL = 1 << 6,
#define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
/*
* Flags inherited by ddt, gang, and vdev children.
*/
ZIO_FLAG_CANFAIL = 1 << 7, /* must be first for INHERIT */
ZIO_FLAG_SPECULATIVE = 1 << 8,
ZIO_FLAG_CONFIG_WRITER = 1 << 9,
ZIO_FLAG_DONT_RETRY = 1 << 10,
ZIO_FLAG_DONT_CACHE = 1 << 11,
ZIO_FLAG_NODATA = 1 << 12,
ZIO_FLAG_INDUCE_DAMAGE = 1 << 13,
ZIO_FLAG_IO_ALLOCATING = 1 << 14,
#define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
#define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
/*
* Flags inherited by vdev children.
*/
ZIO_FLAG_IO_RETRY = 1 << 15, /* must be first for INHERIT */
ZIO_FLAG_PROBE = 1 << 16,
ZIO_FLAG_TRYHARD = 1 << 17,
ZIO_FLAG_OPTIONAL = 1 << 18,
#define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
/*
* Flags not inherited by any children.
*/
ZIO_FLAG_DONT_QUEUE = 1 << 19, /* must be first for INHERIT */
ZIO_FLAG_DONT_PROPAGATE = 1 << 20,
ZIO_FLAG_IO_BYPASS = 1 << 21,
ZIO_FLAG_IO_REWRITE = 1 << 22,
ZIO_FLAG_RAW_COMPRESS = 1 << 23,
ZIO_FLAG_RAW_ENCRYPT = 1 << 24,
ZIO_FLAG_GANG_CHILD = 1 << 25,
ZIO_FLAG_DDT_CHILD = 1 << 26,
ZIO_FLAG_GODFATHER = 1 << 27,
ZIO_FLAG_NOPWRITE = 1 << 28,
ZIO_FLAG_REEXECUTED = 1 << 29,
ZIO_FLAG_DELEGATED = 1 << 30,
ZIO_FLAG_FASTWRITE = 1 << 31,
};
#define ZIO_FLAG_MUSTSUCCEED 0
#define ZIO_FLAG_RAW (ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
#define ZIO_DDT_CHILD_FLAGS(zio) \
(((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
#define ZIO_GANG_CHILD_FLAGS(zio) \
(((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
#define ZIO_VDEV_CHILD_FLAGS(zio) \
(((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
#define ZIO_CHILD_BIT(x) (1 << (x))
#define ZIO_CHILD_BIT_IS_SET(val, x) ((val) & (1 << (x)))
enum zio_child {
ZIO_CHILD_VDEV = 0,
ZIO_CHILD_GANG,
ZIO_CHILD_DDT,
ZIO_CHILD_LOGICAL,
ZIO_CHILD_TYPES
};
#define ZIO_CHILD_VDEV_BIT ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
#define ZIO_CHILD_GANG_BIT ZIO_CHILD_BIT(ZIO_CHILD_GANG)
#define ZIO_CHILD_DDT_BIT ZIO_CHILD_BIT(ZIO_CHILD_DDT)
#define ZIO_CHILD_LOGICAL_BIT ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
#define ZIO_CHILD_ALL_BITS \
(ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT | \
ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
enum zio_wait_type {
ZIO_WAIT_READY = 0,
ZIO_WAIT_DONE,
ZIO_WAIT_TYPES
};
typedef void zio_done_func_t(zio_t *zio);
extern int zio_exclude_metadata;
extern int zio_dva_throttle_enabled;
extern const char *zio_type_name[ZIO_TYPES];
/*
* A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
* identifies any block in the pool. By convention, the meta-objset (MOS)
* is objset 0, and the meta-dnode is object 0. This covers all blocks
* except root blocks and ZIL blocks, which are defined as follows:
*
* Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
* ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
* dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
* dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
*
* Note: this structure is called a bookmark because its original purpose
* was to remember where to resume a pool-wide traverse.
*
* Note: this structure is passed between userland and the kernel, and is
* stored on disk (by virtue of being incorporated into other on-disk
* structures, e.g. dsl_scan_phys_t).
*/
struct zbookmark_phys {
uint64_t zb_objset;
uint64_t zb_object;
int64_t zb_level;
uint64_t zb_blkid;
};
#define SET_BOOKMARK(zb, objset, object, level, blkid) \
{ \
(zb)->zb_objset = objset; \
(zb)->zb_object = object; \
(zb)->zb_level = level; \
(zb)->zb_blkid = blkid; \
}
#define ZB_DESTROYED_OBJSET (-1ULL)
#define ZB_ROOT_OBJECT (0ULL)
#define ZB_ROOT_LEVEL (-1LL)
#define ZB_ROOT_BLKID (0ULL)
#define ZB_ZIL_OBJECT (0ULL)
#define ZB_ZIL_LEVEL (-2LL)
#define ZB_DNODE_LEVEL (-3LL)
#define ZB_DNODE_BLKID (0ULL)
#define ZB_IS_ZERO(zb) \
((zb)->zb_objset == 0 && (zb)->zb_object == 0 && \
(zb)->zb_level == 0 && (zb)->zb_blkid == 0)
#define ZB_IS_ROOT(zb) \
((zb)->zb_object == ZB_ROOT_OBJECT && \
(zb)->zb_level == ZB_ROOT_LEVEL && \
(zb)->zb_blkid == ZB_ROOT_BLKID)
typedef struct zio_prop {
enum zio_checksum zp_checksum;
enum zio_compress zp_compress;
uint8_t zp_complevel;
dmu_object_type_t zp_type;
uint8_t zp_level;
uint8_t zp_copies;
boolean_t zp_dedup;
boolean_t zp_dedup_verify;
boolean_t zp_nopwrite;
boolean_t zp_encrypt;
boolean_t zp_byteorder;
uint8_t zp_salt[ZIO_DATA_SALT_LEN];
uint8_t zp_iv[ZIO_DATA_IV_LEN];
uint8_t zp_mac[ZIO_DATA_MAC_LEN];
uint32_t zp_zpl_smallblk;
} zio_prop_t;
typedef struct zio_cksum_report zio_cksum_report_t;
typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
const abd_t *good_data);
typedef void zio_cksum_free_f(void *cbdata, size_t size);
struct zio_bad_cksum; /* defined in zio_checksum.h */
struct dnode_phys;
struct abd;
struct zio_cksum_report {
struct zio_cksum_report *zcr_next;
nvlist_t *zcr_ereport;
nvlist_t *zcr_detector;
void *zcr_cbdata;
size_t zcr_cbinfo; /* passed to zcr_free() */
uint64_t zcr_align;
uint64_t zcr_length;
zio_cksum_finish_f *zcr_finish;
zio_cksum_free_f *zcr_free;
/* internal use only */
struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
};
typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
void *arg);
zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
typedef struct zio_vsd_ops {
zio_done_func_t *vsd_free;
zio_vsd_cksum_report_f *vsd_cksum_report;
} zio_vsd_ops_t;
typedef struct zio_gang_node {
zio_gbh_phys_t *gn_gbh;
struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
} zio_gang_node_t;
typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
zio_gang_node_t *gn, struct abd *data, uint64_t offset);
typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size);
typedef struct zio_transform {
struct abd *zt_orig_abd;
uint64_t zt_orig_size;
uint64_t zt_bufsize;
zio_transform_func_t *zt_transform;
struct zio_transform *zt_next;
} zio_transform_t;
typedef zio_t *zio_pipe_stage_t(zio_t *zio);
/*
* The io_reexecute flags are distinct from io_flags because the child must
* be able to propagate them to the parent. The normal io_flags are local
* to the zio, not protected by any lock, and not modifiable by children;
* the reexecute flags are protected by io_lock, modifiable by children,
* and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
*/
#define ZIO_REEXECUTE_NOW 0x01
#define ZIO_REEXECUTE_SUSPEND 0x02
/*
* The io_trim flags are used to specify the type of TRIM to perform. They
* only apply to ZIO_TYPE_TRIM zios are distinct from io_flags.
*/
enum trim_flag {
ZIO_TRIM_SECURE = 1 << 0,
};
typedef struct zio_alloc_list {
list_t zal_list;
uint64_t zal_size;
} zio_alloc_list_t;
typedef struct zio_link {
zio_t *zl_parent;
zio_t *zl_child;
list_node_t zl_parent_node;
list_node_t zl_child_node;
} zio_link_t;
struct zio {
/* Core information about this I/O */
zbookmark_phys_t io_bookmark;
zio_prop_t io_prop;
zio_type_t io_type;
enum zio_child io_child_type;
enum trim_flag io_trim_flags;
int io_cmd;
zio_priority_t io_priority;
uint8_t io_reexecute;
uint8_t io_state[ZIO_WAIT_TYPES];
uint64_t io_txg;
spa_t *io_spa;
blkptr_t *io_bp;
blkptr_t *io_bp_override;
blkptr_t io_bp_copy;
list_t io_parent_list;
list_t io_child_list;
zio_t *io_logical;
zio_transform_t *io_transform_stack;
/* Callback info */
zio_done_func_t *io_ready;
zio_done_func_t *io_children_ready;
zio_done_func_t *io_physdone;
zio_done_func_t *io_done;
void *io_private;
int64_t io_prev_space_delta; /* DMU private */
blkptr_t io_bp_orig;
/* io_lsize != io_orig_size iff this is a raw write */
uint64_t io_lsize;
/* Data represented by this I/O */
struct abd *io_abd;
struct abd *io_orig_abd;
uint64_t io_size;
uint64_t io_orig_size;
/* Stuff for the vdev stack */
vdev_t *io_vd;
void *io_vsd;
const zio_vsd_ops_t *io_vsd_ops;
metaslab_class_t *io_metaslab_class; /* dva throttle class */
uint64_t io_offset;
hrtime_t io_timestamp; /* submitted at */
hrtime_t io_queued_timestamp;
hrtime_t io_target_timestamp;
hrtime_t io_delta; /* vdev queue service delta */
hrtime_t io_delay; /* Device access time (disk or */
/* file). */
avl_node_t io_queue_node;
avl_node_t io_offset_node;
avl_node_t io_alloc_node;
zio_alloc_list_t io_alloc_list;
/* Internal pipeline state */
enum zio_flag io_flags;
enum zio_stage io_stage;
enum zio_stage io_pipeline;
enum zio_flag io_orig_flags;
enum zio_stage io_orig_stage;
enum zio_stage io_orig_pipeline;
enum zio_stage io_pipeline_trace;
int io_error;
int io_child_error[ZIO_CHILD_TYPES];
uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
uint64_t io_child_count;
uint64_t io_phys_children;
uint64_t io_parent_count;
uint64_t *io_stall;
zio_t *io_gang_leader;
zio_gang_node_t *io_gang_tree;
void *io_executor;
void *io_waiter;
void *io_bio;
kmutex_t io_lock;
kcondvar_t io_cv;
int io_allocator;
/* FMA state */
zio_cksum_report_t *io_cksum_report;
uint64_t io_ena;
/* Taskq dispatching state */
taskq_ent_t io_tqent;
};
enum blk_verify_flag {
BLK_VERIFY_ONLY,
BLK_VERIFY_LOG,
BLK_VERIFY_HALT
};
extern int zio_bookmark_compare(const void *, const void *);
extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
zio_done_func_t *done, void *priv, enum zio_flag flags);
extern zio_t *zio_root(spa_t *spa,
zio_done_func_t *done, void *priv, enum zio_flag flags);
extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
struct abd *data, uint64_t lsize, zio_done_func_t *done, void *priv,
zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp,
zio_done_func_t *ready, zio_done_func_t *children_ready,
zio_done_func_t *physdone, zio_done_func_t *done,
void *priv, zio_priority_t priority, enum zio_flag flags,
const zbookmark_phys_t *zb);
extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
struct abd *data, uint64_t size, zio_done_func_t *done, void *priv,
zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb);
extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
boolean_t nopwrite);
extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
const blkptr_t *bp,
zio_done_func_t *done, void *priv, enum zio_flag flags);
extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
zio_done_func_t *done, void *priv, enum zio_flag flags);
extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
zio_done_func_t *done, void *priv, zio_priority_t priority,
enum zio_flag flags, enum trim_flag trim_flags);
extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
uint64_t size, struct abd *data, int checksum,
zio_done_func_t *done, void *priv, zio_priority_t priority,
enum zio_flag flags, boolean_t labels);
extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
uint64_t size, struct abd *data, int checksum,
zio_done_func_t *done, void *priv, zio_priority_t priority,
enum zio_flag flags, boolean_t labels);
extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
const blkptr_t *bp, enum zio_flag flags);
extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg,
blkptr_t *new_bp, uint64_t size, boolean_t *slog);
extern void zio_flush(zio_t *zio, vdev_t *vd);
extern void zio_shrink(zio_t *zio, uint64_t size);
extern int zio_wait(zio_t *zio);
extern void zio_nowait(zio_t *zio);
extern void zio_execute(zio_t *zio);
extern void zio_interrupt(zio_t *zio);
extern void zio_delay_init(zio_t *zio);
extern void zio_delay_interrupt(zio_t *zio);
extern void zio_deadman(zio_t *zio, char *tag);
extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **);
extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **);
extern zio_t *zio_unique_parent(zio_t *cio);
extern void zio_add_child(zio_t *pio, zio_t *cio);
extern void *zio_buf_alloc(size_t size);
extern void zio_buf_free(void *buf, size_t size);
extern void *zio_data_buf_alloc(size_t size);
extern void zio_data_buf_free(void *buf, size_t size);
extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size,
uint64_t bufsize, zio_transform_func_t *transform);
extern void zio_pop_transforms(zio_t *zio);
extern void zio_resubmit_stage_async(void *);
extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
uint64_t offset, struct abd *data, uint64_t size, int type,
zio_priority_t priority, enum zio_flag flags,
zio_done_func_t *done, void *priv);
extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority,
enum zio_flag flags, zio_done_func_t *done, void *priv);
extern void zio_vdev_io_bypass(zio_t *zio);
extern void zio_vdev_io_reissue(zio_t *zio);
extern void zio_vdev_io_redone(zio_t *zio);
extern void zio_change_priority(zio_t *pio, zio_priority_t priority);
extern void zio_checksum_verified(zio_t *zio);
extern int zio_worst_error(int e1, int e2);
extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
enum zio_checksum parent);
extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
enum zio_checksum child, enum zio_checksum parent);
extern enum zio_compress zio_compress_select(spa_t *spa,
enum zio_compress child, enum zio_compress parent);
extern uint8_t zio_complevel_select(spa_t *spa, enum zio_compress compress,
uint8_t child, uint8_t parent);
extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t);
extern int zio_resume(spa_t *spa);
extern void zio_resume_wait(spa_t *spa);
extern boolean_t zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp,
boolean_t config_held, enum blk_verify_flag blk_verify);
/*
* Initial setup and teardown.
*/
extern void zio_init(void);
extern void zio_fini(void);
/*
* Fault injection
*/
struct zinject_record;
extern uint32_t zio_injection_enabled;
extern int zio_inject_fault(char *name, int flags, int *id,
struct zinject_record *record);
extern int zio_inject_list_next(int *id, char *name, size_t buflen,
struct zinject_record *record);
extern int zio_clear_fault(int id);
extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb,
uint64_t type, int error);
extern int zio_handle_fault_injection(zio_t *zio, int error);
extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
extern int zio_handle_device_injections(vdev_t *vd, zio_t *zio, int err1,
int err2);
extern int zio_handle_label_injection(zio_t *zio, int error);
extern void zio_handle_ignored_writes(zio_t *zio);
extern hrtime_t zio_handle_io_delay(zio_t *zio);
/*
* Checksum ereport functions
*/
extern int zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
uint64_t length, void *arg, struct zio_bad_cksum *info);
extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
/* If we have the good data in hand, this function can be used */
extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
uint64_t length, const abd_t *good_data, const abd_t *bad_data,
struct zio_bad_cksum *info);
/* Called from spa_sync(), but primarily an injection handler */
extern void spa_handle_ignored_writes(spa_t *spa);
/* zbookmark_phys functions */
boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp,
const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2,
uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);
#ifdef __cplusplus
}
#endif
#endif /* _ZIO_H */
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