mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 10:01:01 +03:00
5c4a4f82c8
- add column for TRIM ZIOs - remove R from ZIO_STAGE_ISSUE_ASYNC, never happened - remove I from ZIO_STAGE_VDEV_IO_DONE, never happened Sponsored-by: Klara, Inc. Sponsored-by: Wasabi Technology, Inc. Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Closes #15959
285 lines
8.8 KiB
C
285 lines
8.8 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 https://opensource.org/licenses/CDDL-1.0.
|
|
* 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.
|
|
* Copyright (c) 2024, Klara Inc.
|
|
*/
|
|
|
|
#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, Ioctl and Trim.
|
|
*
|
|
* I/O operations: (XXX - provide detail for each of the operations)
|
|
*
|
|
* Read:
|
|
* Write:
|
|
* Free:
|
|
* Claim:
|
|
* Ioctl:
|
|
* Trim:
|
|
*
|
|
* 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.
|
|
*
|
|
* Block cloning:
|
|
* The block cloning functionality introduces ZIO_STAGE_BRT_FREE stage which
|
|
* is called during a free pipeline. If the block is referenced in the
|
|
* Block Cloning Table (BRT) we will just decrease its reference counter
|
|
* instead of actually freeing the block.
|
|
*
|
|
* 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, /* RWFCIT */
|
|
|
|
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, /* -WF--T */
|
|
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_BRT_FREE = 1 << 9, /* --F--- */
|
|
|
|
ZIO_STAGE_DDT_READ_START = 1 << 10, /* R----- */
|
|
ZIO_STAGE_DDT_READ_DONE = 1 << 11, /* R----- */
|
|
ZIO_STAGE_DDT_WRITE = 1 << 12, /* -W---- */
|
|
ZIO_STAGE_DDT_FREE = 1 << 13, /* --F--- */
|
|
|
|
ZIO_STAGE_GANG_ASSEMBLE = 1 << 14, /* RWFC-- */
|
|
ZIO_STAGE_GANG_ISSUE = 1 << 15, /* RWFC-- */
|
|
|
|
ZIO_STAGE_DVA_THROTTLE = 1 << 16, /* -W---- */
|
|
ZIO_STAGE_DVA_ALLOCATE = 1 << 17, /* -W---- */
|
|
ZIO_STAGE_DVA_FREE = 1 << 18, /* --F--- */
|
|
ZIO_STAGE_DVA_CLAIM = 1 << 19, /* ---C-- */
|
|
|
|
ZIO_STAGE_READY = 1 << 20, /* RWFCIT */
|
|
|
|
ZIO_STAGE_VDEV_IO_START = 1 << 21, /* RW--IT */
|
|
ZIO_STAGE_VDEV_IO_DONE = 1 << 22, /* RW---T */
|
|
ZIO_STAGE_VDEV_IO_ASSESS = 1 << 23, /* RW--IT */
|
|
|
|
ZIO_STAGE_CHECKSUM_VERIFY = 1 << 24, /* R----- */
|
|
|
|
ZIO_STAGE_DONE = 1 << 25 /* RWFCIT */
|
|
};
|
|
|
|
#define ZIO_ROOT_PIPELINE \
|
|
ZIO_STAGE_DONE
|
|
|
|
#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_WRITE_PIPELINE \
|
|
(ZIO_WRITE_COMMON_STAGES | \
|
|
ZIO_STAGE_WRITE_BP_INIT | \
|
|
ZIO_STAGE_WRITE_COMPRESS | \
|
|
ZIO_STAGE_ENCRYPT | \
|
|
ZIO_STAGE_DVA_THROTTLE | \
|
|
ZIO_STAGE_DVA_ALLOCATE)
|
|
|
|
#define ZIO_DDT_CHILD_WRITE_PIPELINE \
|
|
(ZIO_INTERLOCK_STAGES | \
|
|
ZIO_VDEV_IO_STAGES | \
|
|
ZIO_STAGE_DVA_THROTTLE | \
|
|
ZIO_STAGE_DVA_ALLOCATE)
|
|
|
|
#define ZIO_DDT_WRITE_PIPELINE \
|
|
(ZIO_INTERLOCK_STAGES | \
|
|
ZIO_STAGE_WRITE_BP_INIT | \
|
|
ZIO_STAGE_ISSUE_ASYNC | \
|
|
ZIO_STAGE_WRITE_COMPRESS | \
|
|
ZIO_STAGE_ENCRYPT | \
|
|
ZIO_STAGE_CHECKSUM_GENERATE | \
|
|
ZIO_STAGE_DDT_WRITE)
|
|
|
|
#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_BRT_FREE | \
|
|
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 */
|