1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _ZIO_IMPL_H 27 #define _ZIO_IMPL_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/zfs_context.h> 32 #include <sys/zio.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * I/O Groups: pipeline stage definitions. 40 */ 41 42 typedef enum zio_stage { 43 ZIO_STAGE_OPEN = 0, /* RWFCI */ 44 ZIO_STAGE_WAIT_CHILDREN_READY, /* RWFCI */ 45 46 ZIO_STAGE_WRITE_COMPRESS, /* -W--- */ 47 ZIO_STAGE_CHECKSUM_GENERATE, /* -W--- */ 48 49 ZIO_STAGE_GANG_PIPELINE, /* -WFC- */ 50 51 ZIO_STAGE_GET_GANG_HEADER, /* -WFC- */ 52 ZIO_STAGE_REWRITE_GANG_MEMBERS, /* -W--- */ 53 ZIO_STAGE_FREE_GANG_MEMBERS, /* --F-- */ 54 ZIO_STAGE_CLAIM_GANG_MEMBERS, /* ---C- */ 55 56 ZIO_STAGE_DVA_ALLOCATE, /* -W--- */ 57 ZIO_STAGE_DVA_FREE, /* --F-- */ 58 ZIO_STAGE_DVA_CLAIM, /* ---C- */ 59 60 ZIO_STAGE_GANG_CHECKSUM_GENERATE, /* -W--- */ 61 62 ZIO_STAGE_READY, /* RWFCI */ 63 64 ZIO_STAGE_VDEV_IO_START, /* RW--I */ 65 ZIO_STAGE_VDEV_IO_DONE, /* RW--I */ 66 ZIO_STAGE_VDEV_IO_ASSESS, /* RW--I */ 67 68 ZIO_STAGE_WAIT_CHILDREN_DONE, /* RWFCI */ 69 70 ZIO_STAGE_CHECKSUM_VERIFY, /* R---- */ 71 ZIO_STAGE_READ_GANG_MEMBERS, /* R---- */ 72 ZIO_STAGE_READ_DECOMPRESS, /* R---- */ 73 74 ZIO_STAGE_DONE /* RWFCI */ 75 } zio_stage_t; 76 77 /* 78 * The stages for which there's some performance value in going async. 79 * When compression is enabled, ZIO_STAGE_WRITE_COMPRESS is ORed in as well. 80 */ 81 #define ZIO_ASYNC_PIPELINE_STAGES \ 82 ((1U << ZIO_STAGE_CHECKSUM_GENERATE) | \ 83 (1U << ZIO_STAGE_VDEV_IO_DONE) | \ 84 (1U << ZIO_STAGE_CHECKSUM_VERIFY) | \ 85 (1U << ZIO_STAGE_READ_DECOMPRESS)) 86 87 #define ZIO_VDEV_IO_PIPELINE \ 88 ((1U << ZIO_STAGE_VDEV_IO_START) | \ 89 (1U << ZIO_STAGE_VDEV_IO_DONE) | \ 90 (1U << ZIO_STAGE_VDEV_IO_ASSESS)) 91 92 #define ZIO_READ_PHYS_PIPELINE \ 93 ((1U << ZIO_STAGE_OPEN) | \ 94 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 95 (1U << ZIO_STAGE_READY) | \ 96 ZIO_VDEV_IO_PIPELINE | \ 97 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 98 (1U << ZIO_STAGE_CHECKSUM_VERIFY) | \ 99 (1U << ZIO_STAGE_DONE)) 100 101 #define ZIO_READ_PIPELINE \ 102 ZIO_READ_PHYS_PIPELINE 103 104 #define ZIO_WRITE_PHYS_PIPELINE \ 105 ((1U << ZIO_STAGE_OPEN) | \ 106 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 107 (1U << ZIO_STAGE_CHECKSUM_GENERATE) | \ 108 (1U << ZIO_STAGE_READY) | \ 109 ZIO_VDEV_IO_PIPELINE | \ 110 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 111 (1U << ZIO_STAGE_DONE)) 112 113 #define ZIO_WRITE_COMMON_PIPELINE \ 114 ZIO_WRITE_PHYS_PIPELINE 115 116 #define ZIO_WRITE_PIPELINE \ 117 ((1U << ZIO_STAGE_WRITE_COMPRESS) | \ 118 ZIO_WRITE_COMMON_PIPELINE) 119 120 #define ZIO_GANG_STAGES \ 121 ((1U << ZIO_STAGE_GET_GANG_HEADER) | \ 122 (1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \ 123 (1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \ 124 (1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \ 125 (1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \ 126 (1U << ZIO_STAGE_READ_GANG_MEMBERS)) 127 128 #define ZIO_REWRITE_PIPELINE \ 129 ((1U << ZIO_STAGE_GANG_PIPELINE) | \ 130 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 131 (1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \ 132 (1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \ 133 ZIO_WRITE_COMMON_PIPELINE) 134 135 #define ZIO_WRITE_ALLOCATE_PIPELINE \ 136 ((1U << ZIO_STAGE_DVA_ALLOCATE) | \ 137 ZIO_WRITE_COMMON_PIPELINE) 138 139 #define ZIO_GANG_FREE_STAGES \ 140 ((1U << ZIO_STAGE_GET_GANG_HEADER) | \ 141 (1U << ZIO_STAGE_FREE_GANG_MEMBERS)) 142 143 #define ZIO_FREE_PIPELINE \ 144 ((1U << ZIO_STAGE_OPEN) | \ 145 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 146 (1U << ZIO_STAGE_GANG_PIPELINE) | \ 147 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 148 (1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \ 149 (1U << ZIO_STAGE_DVA_FREE) | \ 150 (1U << ZIO_STAGE_READY) | \ 151 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 152 (1U << ZIO_STAGE_DONE)) 153 154 #define ZIO_CLAIM_PIPELINE \ 155 ((1U << ZIO_STAGE_OPEN) | \ 156 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 157 (1U << ZIO_STAGE_GANG_PIPELINE) | \ 158 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 159 (1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \ 160 (1U << ZIO_STAGE_DVA_CLAIM) | \ 161 (1U << ZIO_STAGE_READY) | \ 162 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 163 (1U << ZIO_STAGE_DONE)) 164 165 #define ZIO_IOCTL_PIPELINE \ 166 ((1U << ZIO_STAGE_OPEN) | \ 167 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 168 (1U << ZIO_STAGE_READY) | \ 169 ZIO_VDEV_IO_PIPELINE | \ 170 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 171 (1U << ZIO_STAGE_DONE)) 172 173 #define ZIO_WAIT_FOR_CHILDREN_PIPELINE \ 174 ((1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 175 (1U << ZIO_STAGE_READY) | \ 176 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 177 (1U << ZIO_STAGE_DONE)) 178 179 #define ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE \ 180 ((1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 181 (1U << ZIO_STAGE_DONE)) 182 183 #define ZIO_VDEV_CHILD_PIPELINE \ 184 (ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE | \ 185 ZIO_VDEV_IO_PIPELINE) 186 187 #define ZIO_ERROR_PIPELINE_MASK \ 188 ZIO_WAIT_FOR_CHILDREN_PIPELINE 189 190 typedef struct zio_transform zio_transform_t; 191 struct zio_transform { 192 void *zt_data; 193 uint64_t zt_size; 194 uint64_t zt_bufsize; 195 zio_transform_t *zt_next; 196 }; 197 198 extern void zio_inject_init(void); 199 extern void zio_inject_fini(void); 200 201 #ifdef __cplusplus 202 } 203 #endif 204 205 #endif /* _ZIO_IMPL_H */ 206