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📄 Makefile.am(2.18 KB)
📄 abd.h(4.25 KB)
📄 abd_impl.h(4.41 KB)
📄 aggsum.h(1.28 KB)
📄 arc.h(11.19 KB)
📄 arc_impl.h(33.15 KB)
📄 avl.h(9.16 KB)
📄 avl_impl.h(4.8 KB)
📄 bitops.h(3.2 KB)
📄 blkptr.h(914 B)
📄 bplist.h(1.6 KB)
📄 bpobj.h(3.21 KB)
📄 bptree.h(1.89 KB)
📄 bqueue.h(1.23 KB)
📄 btree.h(7.68 KB)
📁 crypto
📄 dataset_kstats.h(2.27 KB)
📄 dbuf.h(13.94 KB)
📄 ddt.h(7.96 KB)
📄 dmu.h(39.06 KB)
📄 dmu_impl.h(6.92 KB)
📄 dmu_objset.h(9.19 KB)
📄 dmu_recv.h(2.75 KB)
📄 dmu_redact.h(1.67 KB)
📄 dmu_send.h(2.54 KB)
📄 dmu_traverse.h(3.02 KB)
📄 dmu_tx.h(4.43 KB)
📄 dmu_zfetch.h(2.23 KB)
📄 dnode.h(22.41 KB)
📄 dsl_bookmark.h(5.05 KB)
📄 dsl_crypt.h(7.76 KB)
📄 dsl_dataset.h(18.62 KB)
📄 dsl_deadlist.h(4.21 KB)
📄 dsl_deleg.h(3.27 KB)
📄 dsl_destroy.h(2.19 KB)
📄 dsl_dir.h(7.67 KB)
📄 dsl_pool.h(6.23 KB)
📄 dsl_prop.h(4.38 KB)
📄 dsl_scan.h(7.11 KB)
📄 dsl_synctask.h(4.06 KB)
📄 dsl_userhold.h(1.84 KB)
📄 edonr.h(2.65 KB)
📄 efi_partition.h(16.28 KB)
📁 fm
📄 frame.h(935 B)
📁 fs
📄 hkdf.h(782 B)
📁 lua
📄 metaslab.h(5.48 KB)
📄 metaslab_impl.h(21.23 KB)
📄 mmp.h(2.37 KB)
📄 mntent.h(5.22 KB)
📄 mod.h(1.26 KB)
📄 multilist.h(3.27 KB)
📄 note.h(1.62 KB)
📄 nvpair.h(14.77 KB)
📄 nvpair_impl.h(2.23 KB)
📄 objlist.h(1.13 KB)
📄 pathname.h(2.12 KB)
📄 qat.h(5.86 KB)
📄 range_tree.h(9.73 KB)
📄 rrwlock.h(3.53 KB)
📄 sa.h(5.14 KB)
📄 sa_impl.h(8.29 KB)
📄 skein.h(6.69 KB)
📄 spa.h(46.07 KB)
📄 spa_boot.h(1.16 KB)
📄 spa_checkpoint.h(1.44 KB)
📄 spa_checksum.h(1.96 KB)
📄 spa_impl.h(18.25 KB)
📄 spa_log_spacemap.h(2.62 KB)
📄 space_map.h(8.7 KB)
📄 space_reftree.h(1.69 KB)
📁 sysevent
📄 sysevent.h(1.07 KB)
📄 txg.h(4.66 KB)
📄 txg_impl.h(4.77 KB)
📄 u8_textprep.h(3.59 KB)
📄 u8_textprep_data.h(1.41 MB)
📄 uberblock.h(1.36 KB)
📄 uberblock_impl.h(5.11 KB)
📄 uio_impl.h(1.58 KB)
📄 unique.h(1.56 KB)
📄 uuid.h(2.85 KB)
📄 vdev.h(8.18 KB)
📄 vdev_disk.h(1.65 KB)
📄 vdev_draid.h(3.43 KB)
📄 vdev_file.h(1.23 KB)
📄 vdev_impl.h(22.53 KB)
📄 vdev_indirect_births.h(2.31 KB)
📄 vdev_indirect_mapping.h(4.38 KB)
📄 vdev_initialize.h(1.39 KB)
📄 vdev_raidz.h(2.04 KB)
📄 vdev_raidz_impl.h(10.54 KB)
📄 vdev_rebuild.h(3.4 KB)
📄 vdev_removal.h(2.63 KB)
📄 vdev_trim.h(1.72 KB)
📄 xvattr.h(13.1 KB)
📄 zap.h(18.63 KB)
📄 zap_impl.h(6.79 KB)
📄 zap_leaf.h(7.84 KB)
📄 zcp.h(4.87 KB)
📄 zcp_global.h(742 B)
📄 zcp_iter.h(1.07 KB)
📄 zcp_prop.h(780 B)
📄 zcp_set.h(929 B)
📄 zfeature.h(2.42 KB)
📄 zfs_acl.h(8.08 KB)
📄 zfs_bootenv.h(1.41 KB)
📄 zfs_context.h(21.23 KB)
📄 zfs_debug.h(3.3 KB)
📄 zfs_delay.h(1.25 KB)
📄 zfs_file.h(2.06 KB)
📄 zfs_fuid.h(4.26 KB)
📄 zfs_ioctl.h(17.63 KB)
📄 zfs_ioctl_impl.h(3.1 KB)
📄 zfs_onexit.h(1.65 KB)
📄 zfs_project.h(2.35 KB)
📄 zfs_quota.h(1.57 KB)
📄 zfs_racct.h(1.12 KB)
📄 zfs_ratelimit.h(1.11 KB)
📄 zfs_refcount.h(4.15 KB)
📄 zfs_rlock.h(2.54 KB)
📄 zfs_sa.h(4.38 KB)
📄 zfs_stat.h(1.45 KB)
📄 zfs_sysfs.h(1.49 KB)
📄 zfs_vfsops.h(1.05 KB)
📄 zfs_vnops.h(2 KB)
📄 zfs_znode.h(10.93 KB)
📄 zil.h(18.27 KB)
📄 zil_impl.h(9.12 KB)
📄 zio.h(21.68 KB)
📄 zio_checksum.h(4.55 KB)
📄 zio_compress.h(5.91 KB)
📄 zio_crypt.h(5.21 KB)
📄 zio_impl.h(8.33 KB)
📄 zio_priority.h(1.2 KB)
📄 zrlock.h(1.7 KB)
📁 zstd
📄 zthr.h(1.23 KB)
📄 zvol.h(2.27 KB)
📄 zvol_impl.h(3.7 KB)

Editing: zio_impl.h

/*
 * 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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
 */

#ifndef _ZIO_IMPL_H
#define	_ZIO_IMPL_H

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * XXX -- Describe ZFS I/O pipeline here. Fill in as needed.
 *
 * The ZFS I/O pipeline is comprised of various stages which are defined
 * in the zio_stage enum below. The individual stages are used to construct
 * these basic I/O operations: Read, Write, Free, Claim, and Ioctl.
 *
 * I/O operations: (XXX - provide detail for each of the operations)
 *
 * Read:
 * Write:
 * Free:
 * Claim:
 * Ioctl:
 *
 * Although the most common pipeline are used by the basic I/O operations
 * above, there are some helper pipelines (one could consider them
 * sub-pipelines) which are used internally by the ZIO module and are
 * explained below:
 *
 * Interlock Pipeline:
 * The interlock pipeline is the most basic pipeline and is used by all
 * of the I/O operations. The interlock pipeline does not perform any I/O
 * and is used to coordinate the dependencies between I/Os that are being
 * issued (i.e. the parent/child relationship).
 *
 * Vdev child Pipeline:
 * The vdev child pipeline is responsible for performing the physical I/O.
 * It is in this pipeline where the I/O are queued and possibly cached.
 *
 * In addition to performing I/O, the pipeline is also responsible for
 * data transformations. The transformations performed are based on the
 * specific properties that user may have selected and modify the
 * behavior of the pipeline. Examples of supported transformations are
 * compression, dedup, and nop writes. Transformations will either modify
 * the data or the pipeline. This list below further describes each of
 * the supported transformations:
 *
 * Compression:
 * ZFS supports five different flavors of compression -- gzip, lzjb, lz4, zle,
 * and zstd. Compression occurs as part of the write pipeline and is
 * performed in the ZIO_STAGE_WRITE_BP_INIT stage.
 *
 * Dedup:
 * Dedup reads are handled by the ZIO_STAGE_DDT_READ_START and
 * ZIO_STAGE_DDT_READ_DONE stages. These stages are added to an existing
 * read pipeline if the dedup bit is set on the block pointer.
 * Writing a dedup block is performed by the ZIO_STAGE_DDT_WRITE stage
 * and added to a write pipeline if a user has enabled dedup on that
 * particular dataset.
 *
 * NOP Write:
 * The NOP write feature is performed by the ZIO_STAGE_NOP_WRITE stage
 * and is added to an existing write pipeline if a cryptographically
 * secure checksum (i.e. SHA256) is enabled and compression is turned on.
 * The NOP write stage will compare the checksums of the current data
 * on-disk (level-0 blocks only) and the data that is currently being written.
 * If the checksum values are identical then the pipeline is converted to
 * an interlock pipeline skipping block allocation and bypassing the
 * physical I/O.  The nop write feature can handle writes in either
 * syncing or open context (i.e. zil writes) and as a result is mutually
 * exclusive with dedup.
 *
 * Encryption:
 * Encryption and authentication is handled by the ZIO_STAGE_ENCRYPT stage.
 * This stage determines how the encryption metadata is stored in the bp.
 * Decryption and MAC verification is performed during zio_decrypt() as a
 * transform callback. Encryption is mutually exclusive with nopwrite, because
 * blocks with the same plaintext will be encrypted with different salts and
 * IV's (if dedup is off), and therefore have different ciphertexts. For dedup
 * blocks we deterministically generate the IV and salt by performing an HMAC
 * of the plaintext, which is computationally expensive, but allows us to keep
 * support for encrypted dedup. See the block comment in zio_crypt.c for
 * details.
 */

/*
 * zio pipeline stage definitions
 */
enum zio_stage {
	ZIO_STAGE_OPEN			= 1 << 0,	/* RWFCI */

ZIO_STAGE_READ_BP_INIT		= 1 << 1,	/* R---- */
	ZIO_STAGE_WRITE_BP_INIT		= 1 << 2,	/* -W--- */
	ZIO_STAGE_FREE_BP_INIT		= 1 << 3,	/* --F-- */
	ZIO_STAGE_ISSUE_ASYNC		= 1 << 4,	/* RWF-- */
	ZIO_STAGE_WRITE_COMPRESS	= 1 << 5,	/* -W--- */

ZIO_STAGE_ENCRYPT		= 1 << 6,	/* -W--- */
	ZIO_STAGE_CHECKSUM_GENERATE	= 1 << 7,	/* -W--- */

ZIO_STAGE_NOP_WRITE		= 1 << 8,	/* -W--- */

ZIO_STAGE_DDT_READ_START	= 1 << 9,	/* R---- */
	ZIO_STAGE_DDT_READ_DONE		= 1 << 10,	/* R---- */
	ZIO_STAGE_DDT_WRITE		= 1 << 11,	/* -W--- */
	ZIO_STAGE_DDT_FREE		= 1 << 12,	/* --F-- */

ZIO_STAGE_GANG_ASSEMBLE		= 1 << 13,	/* RWFC- */
	ZIO_STAGE_GANG_ISSUE		= 1 << 14,	/* RWFC- */

ZIO_STAGE_DVA_THROTTLE		= 1 << 15,	/* -W--- */
	ZIO_STAGE_DVA_ALLOCATE		= 1 << 16,	/* -W--- */
	ZIO_STAGE_DVA_FREE		= 1 << 17,	/* --F-- */
	ZIO_STAGE_DVA_CLAIM		= 1 << 18,	/* ---C- */

ZIO_STAGE_READY			= 1 << 19,	/* RWFCI */

ZIO_STAGE_VDEV_IO_START		= 1 << 20,	/* RW--I */
	ZIO_STAGE_VDEV_IO_DONE		= 1 << 21,	/* RW--I */
	ZIO_STAGE_VDEV_IO_ASSESS	= 1 << 22,	/* RW--I */

ZIO_STAGE_CHECKSUM_VERIFY	= 1 << 23,	/* R---- */

ZIO_STAGE_DONE			= 1 << 24	/* RWFCI */
};

#define	ZIO_INTERLOCK_STAGES			\
	(ZIO_STAGE_READY |			\
	ZIO_STAGE_DONE)

#define	ZIO_INTERLOCK_PIPELINE			\
	ZIO_INTERLOCK_STAGES

#define	ZIO_VDEV_IO_STAGES			\
	(ZIO_STAGE_VDEV_IO_START |		\
	ZIO_STAGE_VDEV_IO_DONE |		\
	ZIO_STAGE_VDEV_IO_ASSESS)

#define	ZIO_VDEV_CHILD_PIPELINE			\
	(ZIO_VDEV_IO_STAGES |			\
	ZIO_STAGE_DONE)

#define	ZIO_READ_COMMON_STAGES			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_VDEV_IO_STAGES |			\
	ZIO_STAGE_CHECKSUM_VERIFY)

#define	ZIO_READ_PHYS_PIPELINE			\
	ZIO_READ_COMMON_STAGES

#define	ZIO_READ_PIPELINE			\
	(ZIO_READ_COMMON_STAGES |		\
	ZIO_STAGE_READ_BP_INIT)

#define	ZIO_DDT_CHILD_READ_PIPELINE		\
	ZIO_READ_COMMON_STAGES

#define	ZIO_DDT_READ_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_READ_BP_INIT |		\
	ZIO_STAGE_DDT_READ_START |		\
	ZIO_STAGE_DDT_READ_DONE)

#define	ZIO_WRITE_COMMON_STAGES			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_VDEV_IO_STAGES |			\
	ZIO_STAGE_ISSUE_ASYNC |			\
	ZIO_STAGE_CHECKSUM_GENERATE)

#define	ZIO_WRITE_PHYS_PIPELINE			\
	ZIO_WRITE_COMMON_STAGES

#define	ZIO_REWRITE_PIPELINE			\
	(ZIO_WRITE_COMMON_STAGES |		\
	ZIO_STAGE_WRITE_COMPRESS |		\
	ZIO_STAGE_ENCRYPT |			\
	ZIO_STAGE_WRITE_BP_INIT)

#define	ZIO_DDT_CHILD_WRITE_PIPELINE		\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_VDEV_IO_STAGES |			\
	ZIO_STAGE_DVA_THROTTLE |		\
	ZIO_STAGE_DVA_ALLOCATE)

#define	ZIO_GANG_STAGES				\
	(ZIO_STAGE_GANG_ASSEMBLE |		\
	ZIO_STAGE_GANG_ISSUE)

#define	ZIO_FREE_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_FREE_BP_INIT |		\
	ZIO_STAGE_DVA_FREE)

#define	ZIO_DDT_FREE_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_FREE_BP_INIT |		\
	ZIO_STAGE_ISSUE_ASYNC |			\
	ZIO_STAGE_DDT_FREE)

#define	ZIO_CLAIM_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_DVA_CLAIM)

#define	ZIO_IOCTL_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_VDEV_IO_START |		\
	ZIO_STAGE_VDEV_IO_ASSESS)

#define	ZIO_TRIM_PIPELINE			\
	(ZIO_INTERLOCK_STAGES |			\
	ZIO_STAGE_ISSUE_ASYNC |			\
	ZIO_VDEV_IO_STAGES)

#define	ZIO_BLOCKING_STAGES			\
	(ZIO_STAGE_DVA_ALLOCATE |		\
	ZIO_STAGE_DVA_CLAIM |			\
	ZIO_STAGE_VDEV_IO_START)

extern void zio_inject_init(void);
extern void zio_inject_fini(void);

#ifdef	__cplusplus
}
#endif

#endif	/* _ZIO_IMPL_H */

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