xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/zio.h (revision dd50e0cc)
1fa9e4066Sahrens /*
2fa9e4066Sahrens  * CDDL HEADER START
3fa9e4066Sahrens  *
4fa9e4066Sahrens  * The contents of this file are subject to the terms of the
5ea8dc4b6Seschrock  * Common Development and Distribution License (the "License").
6ea8dc4b6Seschrock  * You may not use this file except in compliance with the License.
7fa9e4066Sahrens  *
8fa9e4066Sahrens  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e4066Sahrens  * or http://www.opensolaris.org/os/licensing.
10fa9e4066Sahrens  * See the License for the specific language governing permissions
11fa9e4066Sahrens  * and limitations under the License.
12fa9e4066Sahrens  *
13fa9e4066Sahrens  * When distributing Covered Code, include this CDDL HEADER in each
14fa9e4066Sahrens  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e4066Sahrens  * If applicable, add the following below this CDDL HEADER, with the
16fa9e4066Sahrens  * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e4066Sahrens  * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e4066Sahrens  *
19fa9e4066Sahrens  * CDDL HEADER END
20fa9e4066Sahrens  */
21c9431fa1Sahl 
22fa9e4066Sahrens /*
23c7cd2421SGeorge Wilson  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
245aeb9474SGarrett D'Amore  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
25f78cdc34SPaul Dagnelie  * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
26a6f561b4SSašo Kiselkov  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
27084fd14fSBrian Behlendorf  * Copyright 2019, Joyent, Inc.
28c8811bd3SToomas Soome  * Copyright 2016 Toomas Soome <tsoome@me.com>
295aeb9474SGarrett D'Amore  */
30fa9e4066Sahrens 
31fa9e4066Sahrens #ifndef _ZIO_H
32fa9e4066Sahrens #define	_ZIO_H
33fa9e4066Sahrens 
34a2cdcdd2SPaul Dagnelie #include <sys/zio_priority.h>
35fa9e4066Sahrens #include <sys/zfs_context.h>
36fa9e4066Sahrens #include <sys/spa.h>
37fa9e4066Sahrens #include <sys/txg.h>
38fa9e4066Sahrens #include <sys/avl.h>
39fa9e4066Sahrens #include <sys/fs/zfs.h>
4044cd46caSbillm #include <sys/zio_impl.h>
41fa9e4066Sahrens 
42fa9e4066Sahrens #ifdef	__cplusplus
43fa9e4066Sahrens extern "C" {
44fa9e4066Sahrens #endif
45fa9e4066Sahrens 
466e1f5caaSNeil Perrin /*
476e1f5caaSNeil Perrin  * Embedded checksum
486e1f5caaSNeil Perrin  */
496e1f5caaSNeil Perrin #define	ZEC_MAGIC	0x210da7ab10c7a11ULL
50fa9e4066Sahrens 
516e1f5caaSNeil Perrin typedef struct zio_eck {
526e1f5caaSNeil Perrin 	uint64_t	zec_magic;	/* for validation, endianness	*/
536e1f5caaSNeil Perrin 	zio_cksum_t	zec_cksum;	/* 256-bit checksum		*/
546e1f5caaSNeil Perrin } zio_eck_t;
55fa9e4066Sahrens 
56fa9e4066Sahrens /*
57fa9e4066Sahrens  * Gang block headers are self-checksumming and contain an array
58fa9e4066Sahrens  * of block pointers.
59fa9e4066Sahrens  */
60fa9e4066Sahrens #define	SPA_GANGBLOCKSIZE	SPA_MINBLOCKSIZE
61fa9e4066Sahrens #define	SPA_GBH_NBLKPTRS	((SPA_GANGBLOCKSIZE - \
626e1f5caaSNeil Perrin 	sizeof (zio_eck_t)) / sizeof (blkptr_t))
63fa9e4066Sahrens #define	SPA_GBH_FILLER		((SPA_GANGBLOCKSIZE - \
646e1f5caaSNeil Perrin 	sizeof (zio_eck_t) - \
65fa9e4066Sahrens 	(SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
66fa9e4066Sahrens 	sizeof (uint64_t))
67fa9e4066Sahrens 
68fa9e4066Sahrens typedef struct zio_gbh {
69fa9e4066Sahrens 	blkptr_t		zg_blkptr[SPA_GBH_NBLKPTRS];
70fa9e4066Sahrens 	uint64_t		zg_filler[SPA_GBH_FILLER];
716e1f5caaSNeil Perrin 	zio_eck_t		zg_tail;
72fa9e4066Sahrens } zio_gbh_phys_t;
73fa9e4066Sahrens 
74fa9e4066Sahrens enum zio_checksum {
75fa9e4066Sahrens 	ZIO_CHECKSUM_INHERIT = 0,
76fa9e4066Sahrens 	ZIO_CHECKSUM_ON,
77fa9e4066Sahrens 	ZIO_CHECKSUM_OFF,
78fa9e4066Sahrens 	ZIO_CHECKSUM_LABEL,
79fa9e4066Sahrens 	ZIO_CHECKSUM_GANG_HEADER,
80fa9e4066Sahrens 	ZIO_CHECKSUM_ZILOG,
81fa9e4066Sahrens 	ZIO_CHECKSUM_FLETCHER_2,
82fa9e4066Sahrens 	ZIO_CHECKSUM_FLETCHER_4,
83fa9e4066Sahrens 	ZIO_CHECKSUM_SHA256,
846e1f5caaSNeil Perrin 	ZIO_CHECKSUM_ZILOG2,
85810e43b2SBill Pijewski 	ZIO_CHECKSUM_NOPARITY,
8645818ee1SMatthew Ahrens 	ZIO_CHECKSUM_SHA512,
8745818ee1SMatthew Ahrens 	ZIO_CHECKSUM_SKEIN,
8845818ee1SMatthew Ahrens 	ZIO_CHECKSUM_EDONR,
89fa9e4066Sahrens 	ZIO_CHECKSUM_FUNCTIONS
90fa9e4066Sahrens };
91fa9e4066Sahrens 
925d7b4d43SMatthew Ahrens /*
935d7b4d43SMatthew Ahrens  * The number of "legacy" compression functions which can be set on individual
945d7b4d43SMatthew Ahrens  * objects.
955d7b4d43SMatthew Ahrens  */
965d7b4d43SMatthew Ahrens #define	ZIO_CHECKSUM_LEGACY_FUNCTIONS ZIO_CHECKSUM_ZILOG2
975d7b4d43SMatthew Ahrens 
987e322df5SJonathan Adams #define	ZIO_CHECKSUM_ON_VALUE	ZIO_CHECKSUM_FLETCHER_4
99fa9e4066Sahrens #define	ZIO_CHECKSUM_DEFAULT	ZIO_CHECKSUM_ON
100fa9e4066Sahrens 
101b24ab676SJeff Bonwick #define	ZIO_CHECKSUM_MASK	0xffULL
102b24ab676SJeff Bonwick #define	ZIO_CHECKSUM_VERIFY	(1 << 8)
103b24ab676SJeff Bonwick 
104b24ab676SJeff Bonwick #define	ZIO_DEDUPCHECKSUM	ZIO_CHECKSUM_SHA256
105b24ab676SJeff Bonwick #define	ZIO_DEDUPDITTO_MIN	100
106b24ab676SJeff Bonwick 
107eb633035STom Caputi #define	ZIO_CRYPT_ON_VALUE	ZIO_CRYPT_AES_256_CCM
108eb633035STom Caputi #define	ZIO_CRYPT_DEFAULT	ZIO_CRYPT_OFF
109eb633035STom Caputi 
110eb633035STom Caputi /* macros defining encryption lengths */
111eb633035STom Caputi #define	ZIO_OBJSET_MAC_LEN		32
112eb633035STom Caputi #define	ZIO_DATA_IV_LEN			12
113eb633035STom Caputi #define	ZIO_DATA_SALT_LEN		8
114eb633035STom Caputi #define	ZIO_DATA_MAC_LEN		16
115eb633035STom Caputi 
1165d7b4d43SMatthew Ahrens /*
1175d7b4d43SMatthew Ahrens  * The number of "legacy" compression functions which can be set on individual
1185d7b4d43SMatthew Ahrens  * objects.
1195d7b4d43SMatthew Ahrens  */
1205d7b4d43SMatthew Ahrens #define	ZIO_COMPRESS_LEGACY_FUNCTIONS ZIO_COMPRESS_LZ4
1215d7b4d43SMatthew Ahrens 
122db1741f5SJustin T. Gibbs /*
123db1741f5SJustin T. Gibbs  * The meaning of "compress = on" selected by the compression features enabled
124db1741f5SJustin T. Gibbs  * on a given pool.
125db1741f5SJustin T. Gibbs  */
126db1741f5SJustin T. Gibbs #define	ZIO_COMPRESS_LEGACY_ON_VALUE	ZIO_COMPRESS_LZJB
127db1741f5SJustin T. Gibbs #define	ZIO_COMPRESS_LZ4_ON_VALUE	ZIO_COMPRESS_LZ4
128db1741f5SJustin T. Gibbs 
129db1741f5SJustin T. Gibbs #define	ZIO_COMPRESS_DEFAULT		ZIO_COMPRESS_OFF
130fa9e4066Sahrens 
131b24ab676SJeff Bonwick #define	BOOTFS_COMPRESS_VALID(compress)			\
132b24ab676SJeff Bonwick 	((compress) == ZIO_COMPRESS_LZJB ||		\
133a6f561b4SSašo Kiselkov 	(compress) == ZIO_COMPRESS_LZ4 ||		\
134c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_1 ||		\
135c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_2 ||		\
136c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_3 ||		\
137c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_4 ||		\
138c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_5 ||		\
139c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_6 ||		\
140c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_7 ||		\
141c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_8 ||		\
142c8811bd3SToomas Soome 	(compress) == ZIO_COMPRESS_GZIP_9 ||		\
143db1741f5SJustin T. Gibbs 	(compress) == ZIO_COMPRESS_ON ||		\
144b24ab676SJeff Bonwick 	(compress) == ZIO_COMPRESS_OFF)
145b24ab676SJeff Bonwick 
1460a4e9518Sgw #define	ZIO_FAILURE_MODE_WAIT		0
1470a4e9518Sgw #define	ZIO_FAILURE_MODE_CONTINUE	1
1480a4e9518Sgw #define	ZIO_FAILURE_MODE_PANIC		2
1490a4e9518Sgw 
150e0f1c0afSOlaf Faaland typedef enum zio_suspend_reason {
151e0f1c0afSOlaf Faaland 	ZIO_SUSPEND_NONE = 0,
152e0f1c0afSOlaf Faaland 	ZIO_SUSPEND_IOERR,
153e0f1c0afSOlaf Faaland 	ZIO_SUSPEND_MMP,
154e0f1c0afSOlaf Faaland } zio_suspend_reason_t;
155e0f1c0afSOlaf Faaland 
156b24ab676SJeff Bonwick enum zio_flag {
157b24ab676SJeff Bonwick 	/*
158b24ab676SJeff Bonwick 	 * Flags inherited by gang, ddt, and vdev children,
159b24ab676SJeff Bonwick 	 * and that must be equal for two zios to aggregate
160b24ab676SJeff Bonwick 	 */
161b24ab676SJeff Bonwick 	ZIO_FLAG_DONT_AGGREGATE	= 1 << 0,
162b24ab676SJeff Bonwick 	ZIO_FLAG_IO_REPAIR	= 1 << 1,
163b24ab676SJeff Bonwick 	ZIO_FLAG_SELF_HEAL	= 1 << 2,
164b24ab676SJeff Bonwick 	ZIO_FLAG_RESILVER	= 1 << 3,
165b24ab676SJeff Bonwick 	ZIO_FLAG_SCRUB		= 1 << 4,
16644ecc532SGeorge Wilson 	ZIO_FLAG_SCAN_THREAD	= 1 << 5,
1672a104a52SAlex Reece 	ZIO_FLAG_PHYSICAL	= 1 << 6,
168b24ab676SJeff Bonwick 
169b24ab676SJeff Bonwick #define	ZIO_FLAG_AGG_INHERIT	(ZIO_FLAG_CANFAIL - 1)
170b24ab676SJeff Bonwick 
171b24ab676SJeff Bonwick 	/*
172b24ab676SJeff Bonwick 	 * Flags inherited by ddt, gang, and vdev children.
173b24ab676SJeff Bonwick 	 */
1742a104a52SAlex Reece 	ZIO_FLAG_CANFAIL	= 1 << 7,	/* must be first for INHERIT */
1752a104a52SAlex Reece 	ZIO_FLAG_SPECULATIVE	= 1 << 8,
1762a104a52SAlex Reece 	ZIO_FLAG_CONFIG_WRITER	= 1 << 9,
1772a104a52SAlex Reece 	ZIO_FLAG_DONT_RETRY	= 1 << 10,
1782a104a52SAlex Reece 	ZIO_FLAG_DONT_CACHE	= 1 << 11,
1792a104a52SAlex Reece 	ZIO_FLAG_NODATA		= 1 << 12,
1802a104a52SAlex Reece 	ZIO_FLAG_INDUCE_DAMAGE	= 1 << 13,
1810f7643c7SGeorge Wilson 	ZIO_FLAG_IO_ALLOCATING	= 1 << 14,
182b24ab676SJeff Bonwick 
183b24ab676SJeff Bonwick #define	ZIO_FLAG_DDT_INHERIT	(ZIO_FLAG_IO_RETRY - 1)
184b24ab676SJeff Bonwick #define	ZIO_FLAG_GANG_INHERIT	(ZIO_FLAG_IO_RETRY - 1)
185b24ab676SJeff Bonwick 
186b24ab676SJeff Bonwick 	/*
187b24ab676SJeff Bonwick 	 * Flags inherited by vdev children.
188b24ab676SJeff Bonwick 	 */
1890f7643c7SGeorge Wilson 	ZIO_FLAG_IO_RETRY	= 1 << 15,	/* must be first for INHERIT */
1900f7643c7SGeorge Wilson 	ZIO_FLAG_PROBE		= 1 << 16,
1910f7643c7SGeorge Wilson 	ZIO_FLAG_TRYHARD	= 1 << 17,
1920f7643c7SGeorge Wilson 	ZIO_FLAG_OPTIONAL	= 1 << 18,
193b24ab676SJeff Bonwick 
194b24ab676SJeff Bonwick #define	ZIO_FLAG_VDEV_INHERIT	(ZIO_FLAG_DONT_QUEUE - 1)
195b24ab676SJeff Bonwick 
196b24ab676SJeff Bonwick 	/*
197b24ab676SJeff Bonwick 	 * Flags not inherited by any children.
198b24ab676SJeff Bonwick 	 */
1990f7643c7SGeorge Wilson 	ZIO_FLAG_DONT_QUEUE	= 1 << 19,	/* must be first for INHERIT */
2000f7643c7SGeorge Wilson 	ZIO_FLAG_DONT_PROPAGATE	= 1 << 20,
2010f7643c7SGeorge Wilson 	ZIO_FLAG_IO_BYPASS	= 1 << 21,
2020f7643c7SGeorge Wilson 	ZIO_FLAG_IO_REWRITE	= 1 << 22,
203eb633035STom Caputi 	ZIO_FLAG_RAW_COMPRESS	= 1 << 23,
204eb633035STom Caputi 	ZIO_FLAG_RAW_ENCRYPT	= 1 << 24,
205eb633035STom Caputi 	ZIO_FLAG_GANG_CHILD	= 1 << 25,
206eb633035STom Caputi 	ZIO_FLAG_DDT_CHILD	= 1 << 26,
207eb633035STom Caputi 	ZIO_FLAG_GODFATHER	= 1 << 27,
208eb633035STom Caputi 	ZIO_FLAG_NOPWRITE	= 1 << 28,
209eb633035STom Caputi 	ZIO_FLAG_REEXECUTED	= 1 << 29,
210eb633035STom Caputi 	ZIO_FLAG_DELEGATED	= 1 << 30,
211b24ab676SJeff Bonwick };
212b24ab676SJeff Bonwick 
213b24ab676SJeff Bonwick #define	ZIO_FLAG_MUSTSUCCEED		0
214eb633035STom Caputi #define	ZIO_FLAG_RAW	(ZIO_FLAG_RAW_COMPRESS | ZIO_FLAG_RAW_ENCRYPT)
215b24ab676SJeff Bonwick 
216b24ab676SJeff Bonwick #define	ZIO_DDT_CHILD_FLAGS(zio)				\
217b24ab676SJeff Bonwick 	(((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) |		\
218b24ab676SJeff Bonwick 	ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
219b24ab676SJeff Bonwick 
220e14bb325SJeff Bonwick #define	ZIO_GANG_CHILD_FLAGS(zio)				\
221e14bb325SJeff Bonwick 	(((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) |		\
222e14bb325SJeff Bonwick 	ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
223e14bb325SJeff Bonwick 
224b24ab676SJeff Bonwick #define	ZIO_VDEV_CHILD_FLAGS(zio)				\
225b24ab676SJeff Bonwick 	(((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) |		\
2265cabbc6bSPrashanth Sreenivasa 	ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_CANFAIL)
227b24ab676SJeff Bonwick 
228d6e1c446SGeorge Wilson #define	ZIO_CHILD_BIT(x)		(1 << (x))
229d6e1c446SGeorge Wilson #define	ZIO_CHILD_BIT_IS_SET(val, x)	((val) & (1 << (x)))
230d6e1c446SGeorge Wilson 
231e14bb325SJeff Bonwick enum zio_child {
232e14bb325SJeff Bonwick 	ZIO_CHILD_VDEV = 0,
233e14bb325SJeff Bonwick 	ZIO_CHILD_GANG,
234b24ab676SJeff Bonwick 	ZIO_CHILD_DDT,
235e14bb325SJeff Bonwick 	ZIO_CHILD_LOGICAL,
236e14bb325SJeff Bonwick 	ZIO_CHILD_TYPES
237e14bb325SJeff Bonwick };
238e14bb325SJeff Bonwick 
239d6e1c446SGeorge Wilson #define	ZIO_CHILD_VDEV_BIT		ZIO_CHILD_BIT(ZIO_CHILD_VDEV)
240d6e1c446SGeorge Wilson #define	ZIO_CHILD_GANG_BIT		ZIO_CHILD_BIT(ZIO_CHILD_GANG)
241d6e1c446SGeorge Wilson #define	ZIO_CHILD_DDT_BIT		ZIO_CHILD_BIT(ZIO_CHILD_DDT)
242d6e1c446SGeorge Wilson #define	ZIO_CHILD_LOGICAL_BIT		ZIO_CHILD_BIT(ZIO_CHILD_LOGICAL)
243d6e1c446SGeorge Wilson #define	ZIO_CHILD_ALL_BITS					\
244e0f1c0afSOlaf Faaland 	(ZIO_CHILD_VDEV_BIT | ZIO_CHILD_GANG_BIT |		\
245d6e1c446SGeorge Wilson 	ZIO_CHILD_DDT_BIT | ZIO_CHILD_LOGICAL_BIT)
246d6e1c446SGeorge Wilson 
247e14bb325SJeff Bonwick enum zio_wait_type {
248e14bb325SJeff Bonwick 	ZIO_WAIT_READY = 0,
249e14bb325SJeff Bonwick 	ZIO_WAIT_DONE,
250e14bb325SJeff Bonwick 	ZIO_WAIT_TYPES
251e14bb325SJeff Bonwick };
252e14bb325SJeff Bonwick 
253fa9e4066Sahrens /*
254e7cbe64fSgw  * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
255e7cbe64fSgw  * graveyard) to indicate checksum errors and fragmentation.
256fa9e4066Sahrens  */
257fa9e4066Sahrens #define	ECKSUM	EBADE
258e7cbe64fSgw #define	EFRAGS	EBADR
259fa9e4066Sahrens 
260fa9e4066Sahrens typedef void zio_done_func_t(zio_t *zio);
261fa9e4066Sahrens 
2620f7643c7SGeorge Wilson extern boolean_t zio_dva_throttle_enabled;
26369962b56SMatthew Ahrens extern const char *zio_type_name[ZIO_TYPES];
264fa9e4066Sahrens 
265ea8dc4b6Seschrock /*
266ea8dc4b6Seschrock  * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
267ea8dc4b6Seschrock  * identifies any block in the pool.  By convention, the meta-objset (MOS)
268b24ab676SJeff Bonwick  * is objset 0, and the meta-dnode is object 0.  This covers all blocks
269b24ab676SJeff Bonwick  * except root blocks and ZIL blocks, which are defined as follows:
270ea8dc4b6Seschrock  *
271b24ab676SJeff Bonwick  * Root blocks (objset_phys_t) are object 0, level -1:  <objset, 0, -1, 0>.
272b24ab676SJeff Bonwick  * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
273b24ab676SJeff Bonwick  * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
274a2cdcdd2SPaul Dagnelie  * dnode visit bookmarks are <objset, object id of dnode, -3, 0>.
275ea8dc4b6Seschrock  *
276b24ab676SJeff Bonwick  * Note: this structure is called a bookmark because its original purpose
277b24ab676SJeff Bonwick  * was to remember where to resume a pool-wide traverse.
278ea8dc4b6Seschrock  *
2797802d7bfSMatthew Ahrens  * Note: this structure is passed between userland and the kernel, and is
2807802d7bfSMatthew Ahrens  * stored on disk (by virtue of being incorporated into other on-disk
2817802d7bfSMatthew Ahrens  * structures, e.g. dsl_scan_phys_t).
282ea8dc4b6Seschrock  */
2837802d7bfSMatthew Ahrens typedef struct zbookmark_phys {
284ea8dc4b6Seschrock 	uint64_t	zb_objset;
285ea8dc4b6Seschrock 	uint64_t	zb_object;
286ea8dc4b6Seschrock 	int64_t		zb_level;
287ea8dc4b6Seschrock 	uint64_t	zb_blkid;
2887802d7bfSMatthew Ahrens } zbookmark_phys_t;
289ea8dc4b6Seschrock 
290b24ab676SJeff Bonwick #define	SET_BOOKMARK(zb, objset, object, level, blkid)  \
291b24ab676SJeff Bonwick {                                                       \
292b24ab676SJeff Bonwick 	(zb)->zb_objset = objset;                       \
293b24ab676SJeff Bonwick 	(zb)->zb_object = object;                       \
294b24ab676SJeff Bonwick 	(zb)->zb_level = level;                         \
295b24ab676SJeff Bonwick 	(zb)->zb_blkid = blkid;                         \
296b24ab676SJeff Bonwick }
297b24ab676SJeff Bonwick 
298b24ab676SJeff Bonwick #define	ZB_DESTROYED_OBJSET	(-1ULL)
299b24ab676SJeff Bonwick 
300b24ab676SJeff Bonwick #define	ZB_ROOT_OBJECT		(0ULL)
301b24ab676SJeff Bonwick #define	ZB_ROOT_LEVEL		(-1LL)
302b24ab676SJeff Bonwick #define	ZB_ROOT_BLKID		(0ULL)
303b24ab676SJeff Bonwick 
304b24ab676SJeff Bonwick #define	ZB_ZIL_OBJECT		(0ULL)
305b24ab676SJeff Bonwick #define	ZB_ZIL_LEVEL		(-2LL)
306b24ab676SJeff Bonwick 
307a2cdcdd2SPaul Dagnelie #define	ZB_DNODE_LEVEL		(-3LL)
308a2cdcdd2SPaul Dagnelie #define	ZB_DNODE_BLKID		(0ULL)
309a2cdcdd2SPaul Dagnelie 
310ad135b5dSChristopher Siden #define	ZB_IS_ZERO(zb)						\
311ad135b5dSChristopher Siden 	((zb)->zb_objset == 0 && (zb)->zb_object == 0 &&	\
312ad135b5dSChristopher Siden 	(zb)->zb_level == 0 && (zb)->zb_blkid == 0)
313ad135b5dSChristopher Siden #define	ZB_IS_ROOT(zb)				\
314ad135b5dSChristopher Siden 	((zb)->zb_object == ZB_ROOT_OBJECT &&	\
315ad135b5dSChristopher Siden 	(zb)->zb_level == ZB_ROOT_LEVEL &&	\
316ad135b5dSChristopher Siden 	(zb)->zb_blkid == ZB_ROOT_BLKID)
317ad135b5dSChristopher Siden 
318e14bb325SJeff Bonwick typedef struct zio_prop {
319e14bb325SJeff Bonwick 	enum zio_checksum	zp_checksum;
320e14bb325SJeff Bonwick 	enum zio_compress	zp_compress;
321e14bb325SJeff Bonwick 	dmu_object_type_t	zp_type;
322e14bb325SJeff Bonwick 	uint8_t			zp_level;
323b24ab676SJeff Bonwick 	uint8_t			zp_copies;
32480901aeaSGeorge Wilson 	boolean_t		zp_dedup;
32580901aeaSGeorge Wilson 	boolean_t		zp_dedup_verify;
32680901aeaSGeorge Wilson 	boolean_t		zp_nopwrite;
327663207adSDon Brady 	uint32_t		zp_zpl_smallblk;
328eb633035STom Caputi 	boolean_t		zp_encrypt;
329eb633035STom Caputi 	boolean_t		zp_byteorder;
330eb633035STom Caputi 	uint8_t			zp_salt[ZIO_DATA_SALT_LEN];
331eb633035STom Caputi 	uint8_t			zp_iv[ZIO_DATA_IV_LEN];
332eb633035STom Caputi 	uint8_t			zp_mac[ZIO_DATA_MAC_LEN];
333e14bb325SJeff Bonwick } zio_prop_t;
334e14bb325SJeff Bonwick 
33522fe2c88SJonathan Adams typedef struct zio_cksum_report zio_cksum_report_t;
33622fe2c88SJonathan Adams 
33722fe2c88SJonathan Adams typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
338eb633035STom Caputi     const abd_t *good_data);
33922fe2c88SJonathan Adams typedef void zio_cksum_free_f(void *cbdata, size_t size);
34022fe2c88SJonathan Adams 
34122fe2c88SJonathan Adams struct zio_bad_cksum;				/* defined in zio_checksum.h */
342ad135b5dSChristopher Siden struct dnode_phys;
343770499e1SDan Kimmel struct abd;
34422fe2c88SJonathan Adams 
34522fe2c88SJonathan Adams struct zio_cksum_report {
34622fe2c88SJonathan Adams 	struct zio_cksum_report *zcr_next;
34722fe2c88SJonathan Adams 	nvlist_t		*zcr_ereport;
34822fe2c88SJonathan Adams 	nvlist_t		*zcr_detector;
34922fe2c88SJonathan Adams 	void			*zcr_cbdata;
35022fe2c88SJonathan Adams 	size_t			zcr_cbinfo;	/* passed to zcr_free() */
351b24ab676SJeff Bonwick 	uint64_t		zcr_align;
35222fe2c88SJonathan Adams 	uint64_t		zcr_length;
35322fe2c88SJonathan Adams 	zio_cksum_finish_f	*zcr_finish;
35422fe2c88SJonathan Adams 	zio_cksum_free_f	*zcr_free;
35522fe2c88SJonathan Adams 
35622fe2c88SJonathan Adams 	/* internal use only */
35722fe2c88SJonathan Adams 	struct zio_bad_cksum	*zcr_ckinfo;	/* information from failure */
35822fe2c88SJonathan Adams };
35922fe2c88SJonathan Adams 
36022fe2c88SJonathan Adams typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
36122fe2c88SJonathan Adams     void *arg);
36222fe2c88SJonathan Adams 
36322fe2c88SJonathan Adams zio_vsd_cksum_report_f	zio_vsd_default_cksum_report;
36422fe2c88SJonathan Adams 
36522fe2c88SJonathan Adams typedef struct zio_vsd_ops {
36622fe2c88SJonathan Adams 	zio_done_func_t		*vsd_free;
36722fe2c88SJonathan Adams 	zio_vsd_cksum_report_f	*vsd_cksum_report;
36822fe2c88SJonathan Adams } zio_vsd_ops_t;
36922fe2c88SJonathan Adams 
370e14bb325SJeff Bonwick typedef struct zio_gang_node {
371e14bb325SJeff Bonwick 	zio_gbh_phys_t		*gn_gbh;
372e14bb325SJeff Bonwick 	struct zio_gang_node	*gn_child[SPA_GBH_NBLKPTRS];
373e14bb325SJeff Bonwick } zio_gang_node_t;
374e14bb325SJeff Bonwick 
375e14bb325SJeff Bonwick typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
376770499e1SDan Kimmel     zio_gang_node_t *gn, struct abd *data, uint64_t offset);
377e14bb325SJeff Bonwick 
378770499e1SDan Kimmel typedef void zio_transform_func_t(zio_t *zio, struct abd *data, uint64_t size);
379e14bb325SJeff Bonwick 
380e14bb325SJeff Bonwick typedef struct zio_transform {
381770499e1SDan Kimmel 	struct abd		*zt_orig_abd;
382e14bb325SJeff Bonwick 	uint64_t		zt_orig_size;
383e14bb325SJeff Bonwick 	uint64_t		zt_bufsize;
384e14bb325SJeff Bonwick 	zio_transform_func_t	*zt_transform;
385e14bb325SJeff Bonwick 	struct zio_transform	*zt_next;
386e14bb325SJeff Bonwick } zio_transform_t;
387e14bb325SJeff Bonwick 
388e14bb325SJeff Bonwick typedef int zio_pipe_stage_t(zio_t *zio);
389e14bb325SJeff Bonwick 
390e14bb325SJeff Bonwick /*
391e14bb325SJeff Bonwick  * The io_reexecute flags are distinct from io_flags because the child must
392e14bb325SJeff Bonwick  * be able to propagate them to the parent.  The normal io_flags are local
393e14bb325SJeff Bonwick  * to the zio, not protected by any lock, and not modifiable by children;
394e14bb325SJeff Bonwick  * the reexecute flags are protected by io_lock, modifiable by children,
395e14bb325SJeff Bonwick  * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
396e14bb325SJeff Bonwick  */
397e14bb325SJeff Bonwick #define	ZIO_REEXECUTE_NOW	0x01
398e14bb325SJeff Bonwick #define	ZIO_REEXECUTE_SUSPEND	0x02
399e14bb325SJeff Bonwick 
400084fd14fSBrian Behlendorf /*
401084fd14fSBrian Behlendorf  * The io_trim flags are used to specify the type of TRIM to perform.  They
402084fd14fSBrian Behlendorf  * only apply to ZIO_TYPE_TRIM zios and are distinct from io_flags.
403084fd14fSBrian Behlendorf  */
404084fd14fSBrian Behlendorf enum trim_flag {
405084fd14fSBrian Behlendorf 	ZIO_TRIM_SECURE		= 1 << 0,
406084fd14fSBrian Behlendorf };
407084fd14fSBrian Behlendorf 
4088363e80aSGeorge Wilson typedef struct zio_alloc_list {
4098363e80aSGeorge Wilson 	list_t  zal_list;
4108363e80aSGeorge Wilson 	uint64_t zal_size;
4118363e80aSGeorge Wilson } zio_alloc_list_t;
4128363e80aSGeorge Wilson 
413a3f829aeSBill Moore typedef struct zio_link {
414a3f829aeSBill Moore 	zio_t		*zl_parent;
415a3f829aeSBill Moore 	zio_t		*zl_child;
416a3f829aeSBill Moore 	list_node_t	zl_parent_node;
417a3f829aeSBill Moore 	list_node_t	zl_child_node;
418a3f829aeSBill Moore } zio_link_t;
419a3f829aeSBill Moore 
420fa9e4066Sahrens struct zio {
421fa9e4066Sahrens 	/* Core information about this I/O */
4227802d7bfSMatthew Ahrens 	zbookmark_phys_t	io_bookmark;
423e14bb325SJeff Bonwick 	zio_prop_t	io_prop;
424e14bb325SJeff Bonwick 	zio_type_t	io_type;
425e14bb325SJeff Bonwick 	enum zio_child	io_child_type;
426084fd14fSBrian Behlendorf 	enum trim_flag	io_trim_flags;
427e14bb325SJeff Bonwick 	int		io_cmd;
42869962b56SMatthew Ahrens 	zio_priority_t	io_priority;
429e14bb325SJeff Bonwick 	uint8_t		io_reexecute;
430a3f829aeSBill Moore 	uint8_t		io_state[ZIO_WAIT_TYPES];
431fa9e4066Sahrens 	uint64_t	io_txg;
432e14bb325SJeff Bonwick 	spa_t		*io_spa;
433fa9e4066Sahrens 	blkptr_t	*io_bp;
434b24ab676SJeff Bonwick 	blkptr_t	*io_bp_override;
435fa9e4066Sahrens 	blkptr_t	io_bp_copy;
436a3f829aeSBill Moore 	list_t		io_parent_list;
437a3f829aeSBill Moore 	list_t		io_child_list;
438ea8dc4b6Seschrock 	zio_t		*io_logical;
439e14bb325SJeff Bonwick 	zio_transform_t *io_transform_stack;
440fa9e4066Sahrens 
441fa9e4066Sahrens 	/* Callback info */
442c717a561Smaybee 	zio_done_func_t	*io_ready;
4438df0bcf0SPaul Dagnelie 	zio_done_func_t	*io_children_ready;
44469962b56SMatthew Ahrens 	zio_done_func_t	*io_physdone;
445fa9e4066Sahrens 	zio_done_func_t	*io_done;
446fa9e4066Sahrens 	void		*io_private;
447b24ab676SJeff Bonwick 	int64_t		io_prev_space_delta;	/* DMU private */
448fa9e4066Sahrens 	blkptr_t	io_bp_orig;
449fa9e4066Sahrens 
450fa9e4066Sahrens 	/* Data represented by this I/O */
451770499e1SDan Kimmel 	struct abd	*io_abd;
452770499e1SDan Kimmel 	struct abd	*io_orig_abd;
453fa9e4066Sahrens 	uint64_t	io_size;
454b24ab676SJeff Bonwick 	uint64_t	io_orig_size;
4555602294fSDan Kimmel 	/* io_lsize != io_orig_size iff this is a raw write */
4565602294fSDan Kimmel 	uint64_t	io_lsize;
457fa9e4066Sahrens 
458fa9e4066Sahrens 	/* Stuff for the vdev stack */
459fa9e4066Sahrens 	vdev_t		*io_vd;
460fa9e4066Sahrens 	void		*io_vsd;
46122fe2c88SJonathan Adams 	const zio_vsd_ops_t *io_vsd_ops;
462663207adSDon Brady 	metaslab_class_t *io_metaslab_class;	/* dva throttle class */
46322fe2c88SJonathan Adams 
464fa9e4066Sahrens 	uint64_t	io_offset;
465c55e05cbSMatthew Ahrens 	hrtime_t	io_timestamp;
4660f7643c7SGeorge Wilson 	hrtime_t	io_queued_timestamp;
46797e81309SPrakash Surya 	hrtime_t	io_target_timestamp;
468*dd50e0ccSTony Hutter 	hrtime_t	io_delta;	/* vdev queue service delta */
469*dd50e0ccSTony Hutter 	hrtime_t	io_delay;	/* Device access time (disk or */
470*dd50e0ccSTony Hutter 					/* file). */
47169962b56SMatthew Ahrens 	avl_node_t	io_queue_node;
472fe319232SJustin T. Gibbs 	avl_node_t	io_offset_node;
4730f7643c7SGeorge Wilson 	avl_node_t	io_alloc_node;
474e0f1c0afSOlaf Faaland 	zio_alloc_list_t	io_alloc_list;
475fa9e4066Sahrens 
476fa9e4066Sahrens 	/* Internal pipeline state */
477b24ab676SJeff Bonwick 	enum zio_flag	io_flags;
478b24ab676SJeff Bonwick 	enum zio_stage	io_stage;
479b24ab676SJeff Bonwick 	enum zio_stage	io_pipeline;
480b24ab676SJeff Bonwick 	enum zio_flag	io_orig_flags;
481b24ab676SJeff Bonwick 	enum zio_stage	io_orig_stage;
482b24ab676SJeff Bonwick 	enum zio_stage	io_orig_pipeline;
4830f7643c7SGeorge Wilson 	enum zio_stage	io_pipeline_trace;
484e14bb325SJeff Bonwick 	int		io_error;
485e14bb325SJeff Bonwick 	int		io_child_error[ZIO_CHILD_TYPES];
486e14bb325SJeff Bonwick 	uint64_t	io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
487b24ab676SJeff Bonwick 	uint64_t	io_child_count;
48869962b56SMatthew Ahrens 	uint64_t	io_phys_children;
489b24ab676SJeff Bonwick 	uint64_t	io_parent_count;
490e14bb325SJeff Bonwick 	uint64_t	*io_stall;
491f5383399SBill Moore 	zio_t		*io_gang_leader;
492e14bb325SJeff Bonwick 	zio_gang_node_t	*io_gang_tree;
493e14bb325SJeff Bonwick 	void		*io_executor;
494fa9e4066Sahrens 	void		*io_waiter;
495fa9e4066Sahrens 	kmutex_t	io_lock;
496fa9e4066Sahrens 	kcondvar_t	io_cv;
497f78cdc34SPaul Dagnelie 	int		io_allocator;
498ea8dc4b6Seschrock 
499ea8dc4b6Seschrock 	/* FMA state */
50022fe2c88SJonathan Adams 	zio_cksum_report_t *io_cksum_report;
501ea8dc4b6Seschrock 	uint64_t	io_ena;
5025aeb9474SGarrett D'Amore 
5035aeb9474SGarrett D'Amore 	/* Taskq dispatching state */
5045aeb9474SGarrett D'Amore 	taskq_ent_t	io_tqent;
505fa9e4066Sahrens };
506fa9e4066Sahrens 
50794c2d0ebSMatthew Ahrens extern int zio_bookmark_compare(const void *, const void *);
5080f7643c7SGeorge Wilson 
509a3f829aeSBill Moore extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
510b24ab676SJeff Bonwick     zio_done_func_t *done, void *private, enum zio_flag flags);
511fa9e4066Sahrens 
512fa9e4066Sahrens extern zio_t *zio_root(spa_t *spa,
513b24ab676SJeff Bonwick     zio_done_func_t *done, void *private, enum zio_flag flags);
514fa9e4066Sahrens 
515770499e1SDan Kimmel extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
516770499e1SDan Kimmel     struct abd *data, uint64_t lsize, zio_done_func_t *done, void *private,
5177802d7bfSMatthew Ahrens     zio_priority_t priority, enum zio_flag flags, const zbookmark_phys_t *zb);
518fa9e4066Sahrens 
519e14bb325SJeff Bonwick extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
520770499e1SDan Kimmel     struct abd *data, uint64_t size, uint64_t psize, const zio_prop_t *zp,
5218df0bcf0SPaul Dagnelie     zio_done_func_t *ready, zio_done_func_t *children_ready,
5228df0bcf0SPaul Dagnelie     zio_done_func_t *physdone, zio_done_func_t *done,
5238df0bcf0SPaul Dagnelie     void *private, zio_priority_t priority, enum zio_flag flags,
5248df0bcf0SPaul Dagnelie     const zbookmark_phys_t *zb);
525fa9e4066Sahrens 
526e14bb325SJeff Bonwick extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
527770499e1SDan Kimmel     struct abd *data, uint64_t size, zio_done_func_t *done, void *private,
5287802d7bfSMatthew Ahrens     zio_priority_t priority, enum zio_flag flags, zbookmark_phys_t *zb);
529fa9e4066Sahrens 
53080901aeaSGeorge Wilson extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies,
53180901aeaSGeorge Wilson     boolean_t nopwrite);
53282c9918fSTim Haley 
533b24ab676SJeff Bonwick extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
534fa9e4066Sahrens 
535b24ab676SJeff Bonwick extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
536b24ab676SJeff Bonwick     const blkptr_t *bp,
537b24ab676SJeff Bonwick     zio_done_func_t *done, void *private, enum zio_flag flags);
538fa9e4066Sahrens 
539fa9e4066Sahrens extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
54069962b56SMatthew Ahrens     zio_done_func_t *done, void *private, enum zio_flag flags);
541fa9e4066Sahrens 
542084fd14fSBrian Behlendorf extern zio_t *zio_trim(zio_t *pio, vdev_t *vd, uint64_t offset, uint64_t size,
543084fd14fSBrian Behlendorf     zio_done_func_t *done, void *private, zio_priority_t priority,
544084fd14fSBrian Behlendorf     enum zio_flag flags, enum trim_flag trim_flags);
545084fd14fSBrian Behlendorf 
546fa9e4066Sahrens extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
547770499e1SDan Kimmel     uint64_t size, struct abd *data, int checksum,
54869962b56SMatthew Ahrens     zio_done_func_t *done, void *private, zio_priority_t priority,
54969962b56SMatthew Ahrens     enum zio_flag flags, boolean_t labels);
550fa9e4066Sahrens 
551fa9e4066Sahrens extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
552770499e1SDan Kimmel     uint64_t size, struct abd *data, int checksum,
55369962b56SMatthew Ahrens     zio_done_func_t *done, void *private, zio_priority_t priority,
55469962b56SMatthew Ahrens     enum zio_flag flags, boolean_t labels);
555fa9e4066Sahrens 
556b24ab676SJeff Bonwick extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
557b24ab676SJeff Bonwick     const blkptr_t *bp, enum zio_flag flags);
558b24ab676SJeff Bonwick 
559eb633035STom Caputi extern int zio_alloc_zil(spa_t *spa, objset_t *os, uint64_t txg,
560f78cdc34SPaul Dagnelie     blkptr_t *new_bp, blkptr_t *old_bp, uint64_t size, boolean_t *slog);
561eb633035STom Caputi extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
56217f17c2dSbonwick extern void zio_flush(zio_t *zio, vdev_t *vd);
5636e1f5caaSNeil Perrin extern void zio_shrink(zio_t *zio, uint64_t size);
564fa9e4066Sahrens 
565fa9e4066Sahrens extern int zio_wait(zio_t *zio);
566fa9e4066Sahrens extern void zio_nowait(zio_t *zio);
567e05725b1Sbonwick extern void zio_execute(zio_t *zio);
568e05725b1Sbonwick extern void zio_interrupt(zio_t *zio);
56997e81309SPrakash Surya extern void zio_delay_init(zio_t *zio);
57097e81309SPrakash Surya extern void zio_delay_interrupt(zio_t *zio);
571e05725b1Sbonwick 
5720f7643c7SGeorge Wilson extern zio_t *zio_walk_parents(zio_t *cio, zio_link_t **);
5730f7643c7SGeorge Wilson extern zio_t *zio_walk_children(zio_t *pio, zio_link_t **);
574a3f829aeSBill Moore extern zio_t *zio_unique_parent(zio_t *cio);
575a3f829aeSBill Moore extern void zio_add_child(zio_t *pio, zio_t *cio);
576a3f829aeSBill Moore 
577fa9e4066Sahrens extern void *zio_buf_alloc(size_t size);
578fa9e4066Sahrens extern void zio_buf_free(void *buf, size_t size);
579ad23a2dbSjohansen extern void *zio_data_buf_alloc(size_t size);
580ad23a2dbSjohansen extern void zio_data_buf_free(void *buf, size_t size);
581fa9e4066Sahrens 
582770499e1SDan Kimmel extern void zio_push_transform(zio_t *zio, struct abd *abd, uint64_t size,
583dcbf3bd6SGeorge Wilson     uint64_t bufsize, zio_transform_func_t *transform);
584dcbf3bd6SGeorge Wilson extern void zio_pop_transforms(zio_t *zio);
585dcbf3bd6SGeorge Wilson 
5860a4e9518Sgw extern void zio_resubmit_stage_async(void *);
587fa9e4066Sahrens 
588fa9e4066Sahrens extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
589770499e1SDan Kimmel     uint64_t offset, struct abd *data, uint64_t size, int type,
59069962b56SMatthew Ahrens     zio_priority_t priority, enum zio_flag flags,
59169962b56SMatthew Ahrens     zio_done_func_t *done, void *private);
592fa9e4066Sahrens 
593e14bb325SJeff Bonwick extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
5943a4b1be9SMatthew Ahrens     struct abd *data, uint64_t size, zio_type_t type, zio_priority_t priority,
595b24ab676SJeff Bonwick     enum zio_flag flags, zio_done_func_t *done, void *private);
596e14bb325SJeff Bonwick 
597fa9e4066Sahrens extern void zio_vdev_io_bypass(zio_t *zio);
598fa9e4066Sahrens extern void zio_vdev_io_reissue(zio_t *zio);
599fa9e4066Sahrens extern void zio_vdev_io_redone(zio_t *zio);
600fa9e4066Sahrens 
601a3874b8bSToomas Soome extern void zio_change_priority(zio_t *pio, zio_priority_t priority);
602a3874b8bSToomas Soome 
603fa9e4066Sahrens extern void zio_checksum_verified(zio_t *zio);
604e14bb325SJeff Bonwick extern int zio_worst_error(int e1, int e2);
605fa9e4066Sahrens 
606b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
607b24ab676SJeff Bonwick     enum zio_checksum parent);
608b24ab676SJeff Bonwick extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
609b24ab676SJeff Bonwick     enum zio_checksum child, enum zio_checksum parent);
610db1741f5SJustin T. Gibbs extern enum zio_compress zio_compress_select(spa_t *spa,
611db1741f5SJustin T. Gibbs     enum zio_compress child, enum zio_compress parent);
612fa9e4066Sahrens 
613e0f1c0afSOlaf Faaland extern void zio_suspend(spa_t *spa, zio_t *zio, zio_suspend_reason_t);
61454d692b7SGeorge Wilson extern int zio_resume(spa_t *spa);
615e14bb325SJeff Bonwick extern void zio_resume_wait(spa_t *spa);
616ea8dc4b6Seschrock 
617fa9e4066Sahrens /*
618fa9e4066Sahrens  * Initial setup and teardown.
619fa9e4066Sahrens  */
620fa9e4066Sahrens extern void zio_init(void);
621fa9e4066Sahrens extern void zio_fini(void);
622fa9e4066Sahrens 
623ea8dc4b6Seschrock /*
624ea8dc4b6Seschrock  * Fault injection
625ea8dc4b6Seschrock  */
626ea8dc4b6Seschrock struct zinject_record;
627ea8dc4b6Seschrock extern uint32_t zio_injection_enabled;
628ea8dc4b6Seschrock extern int zio_inject_fault(char *name, int flags, int *id,
629ea8dc4b6Seschrock     struct zinject_record *record);
630ea8dc4b6Seschrock extern int zio_inject_list_next(int *id, char *name, size_t buflen,
631ea8dc4b6Seschrock     struct zinject_record *record);
632ea8dc4b6Seschrock extern int zio_clear_fault(int id);
6331195e687SMark J Musante extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
634eb633035STom Caputi extern int zio_handle_decrypt_injection(spa_t *spa, const zbookmark_phys_t *zb,
635eb633035STom Caputi     uint64_t type, int error);
636ea8dc4b6Seschrock extern int zio_handle_fault_injection(zio_t *zio, int error);
6378956713aSEric Schrock extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
63821bf64a7Sgw extern int zio_handle_label_injection(zio_t *zio, int error);
639468c413aSTim Haley extern void zio_handle_ignored_writes(zio_t *zio);
64097e81309SPrakash Surya extern hrtime_t zio_handle_io_delay(zio_t *zio);
641ea8dc4b6Seschrock 
64222fe2c88SJonathan Adams /*
64322fe2c88SJonathan Adams  * Checksum ereport functions
64422fe2c88SJonathan Adams  */
645eb633035STom Caputi extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
646eb633035STom Caputi     const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
647eb633035STom Caputi     uint64_t length, void *arg, struct zio_bad_cksum *info);
64822fe2c88SJonathan Adams extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
649eb633035STom Caputi     const abd_t *good_data, const abd_t *bad_data, boolean_t drop_if_identical);
65022fe2c88SJonathan Adams 
65122fe2c88SJonathan Adams extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
65222fe2c88SJonathan Adams extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
65322fe2c88SJonathan Adams 
65422fe2c88SJonathan Adams /* If we have the good data in hand, this function can be used */
655*dd50e0ccSTony Hutter extern int zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
656eb633035STom Caputi     const zbookmark_phys_t *zb, struct zio *zio, uint64_t offset,
657eb633035STom Caputi     uint64_t length, const abd_t *good_data, const abd_t *bad_data,
658eb633035STom Caputi     struct zio_bad_cksum *info);
65922fe2c88SJonathan Adams 
660468c413aSTim Haley /* Called from spa_sync(), but primarily an injection handler */
661468c413aSTim Haley extern void spa_handle_ignored_writes(spa_t *spa);
662468c413aSTim Haley 
6637802d7bfSMatthew Ahrens /* zbookmark_phys functions */
664a2cdcdd2SPaul Dagnelie boolean_t zbookmark_subtree_completed(const struct dnode_phys *dnp,
665a2cdcdd2SPaul Dagnelie     const zbookmark_phys_t *subtree_root, const zbookmark_phys_t *last_block);
666a2cdcdd2SPaul Dagnelie int zbookmark_compare(uint16_t dbss1, uint8_t ibs1, uint16_t dbss2,
667a2cdcdd2SPaul Dagnelie     uint8_t ibs2, const zbookmark_phys_t *zb1, const zbookmark_phys_t *zb2);
668ad135b5dSChristopher Siden 
669fa9e4066Sahrens #ifdef	__cplusplus
670fa9e4066Sahrens }
671fa9e4066Sahrens #endif
672fa9e4066Sahrens 
673fa9e4066Sahrens #endif	/* _ZIO_H */
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