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_DVA_TRANSLATE, /* RW--- */ 65 66 ZIO_STAGE_VDEV_IO_SETUP, /* RW--I */ 67 ZIO_STAGE_VDEV_IO_START, /* RW--I */ 68 ZIO_STAGE_VDEV_IO_DONE, /* RW--I */ 69 ZIO_STAGE_VDEV_IO_ASSESS, /* RW--I */ 70 71 ZIO_STAGE_WAIT_CHILDREN_DONE, /* RWFCI */ 72 73 ZIO_STAGE_CHECKSUM_VERIFY, /* R---- */ 74 ZIO_STAGE_READ_GANG_MEMBERS, /* R---- */ 75 ZIO_STAGE_READ_DECOMPRESS, /* R---- */ 76 77 ZIO_STAGE_DONE /* RWFCI */ 78 } zio_stage_t; 79 80 /* 81 * The stages for which there's some performance value in going async. 82 * When compression is enabled, ZIO_STAGE_WRITE_COMPRESS is ORed in as well. 83 */ 84 #define ZIO_ASYNC_PIPELINE_STAGES \ 85 ((1U << ZIO_STAGE_CHECKSUM_GENERATE) | \ 86 (1U << ZIO_STAGE_VDEV_IO_DONE) | \ 87 (1U << ZIO_STAGE_CHECKSUM_VERIFY) | \ 88 (1U << ZIO_STAGE_READ_DECOMPRESS)) 89 90 #define ZIO_VDEV_IO_PIPELINE \ 91 ((1U << ZIO_STAGE_VDEV_IO_SETUP) | \ 92 (1U << ZIO_STAGE_VDEV_IO_START) | \ 93 (1U << ZIO_STAGE_VDEV_IO_DONE) | \ 94 (1U << ZIO_STAGE_VDEV_IO_ASSESS)) 95 96 #define ZIO_READ_PHYS_PIPELINE \ 97 ((1U << ZIO_STAGE_OPEN) | \ 98 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 99 (1U << ZIO_STAGE_READY) | \ 100 ZIO_VDEV_IO_PIPELINE | \ 101 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 102 (1U << ZIO_STAGE_CHECKSUM_VERIFY) | \ 103 (1U << ZIO_STAGE_DONE)) 104 105 #define ZIO_READ_PIPELINE \ 106 ((1U << ZIO_STAGE_DVA_TRANSLATE) | \ 107 ZIO_READ_PHYS_PIPELINE) 108 109 #define ZIO_WRITE_PHYS_PIPELINE \ 110 ((1U << ZIO_STAGE_OPEN) | \ 111 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 112 (1U << ZIO_STAGE_CHECKSUM_GENERATE) | \ 113 (1U << ZIO_STAGE_READY) | \ 114 ZIO_VDEV_IO_PIPELINE | \ 115 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 116 (1U << ZIO_STAGE_DONE)) 117 118 #define ZIO_WRITE_COMMON_PIPELINE \ 119 ((1U << ZIO_STAGE_DVA_TRANSLATE) | \ 120 ZIO_WRITE_PHYS_PIPELINE) 121 122 #define ZIO_WRITE_PIPELINE \ 123 ((1U << ZIO_STAGE_WRITE_COMPRESS) | \ 124 ZIO_WRITE_COMMON_PIPELINE) 125 126 #define ZIO_GANG_STAGES \ 127 ((1U << ZIO_STAGE_GET_GANG_HEADER) | \ 128 (1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \ 129 (1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \ 130 (1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \ 131 (1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \ 132 (1U << ZIO_STAGE_READ_GANG_MEMBERS)) 133 134 #define ZIO_REWRITE_PIPELINE \ 135 ((1U << ZIO_STAGE_GANG_PIPELINE) | \ 136 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 137 (1U << ZIO_STAGE_REWRITE_GANG_MEMBERS) | \ 138 (1U << ZIO_STAGE_GANG_CHECKSUM_GENERATE) | \ 139 ZIO_WRITE_COMMON_PIPELINE) 140 141 #define ZIO_WRITE_ALLOCATE_PIPELINE \ 142 ((1U << ZIO_STAGE_DVA_ALLOCATE) | \ 143 ZIO_WRITE_COMMON_PIPELINE) 144 145 #define ZIO_GANG_FREE_STAGES \ 146 ((1U << ZIO_STAGE_GET_GANG_HEADER) | \ 147 (1U << ZIO_STAGE_FREE_GANG_MEMBERS)) 148 149 #define ZIO_FREE_PIPELINE \ 150 ((1U << ZIO_STAGE_OPEN) | \ 151 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 152 (1U << ZIO_STAGE_GANG_PIPELINE) | \ 153 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 154 (1U << ZIO_STAGE_FREE_GANG_MEMBERS) | \ 155 (1U << ZIO_STAGE_DVA_FREE) | \ 156 (1U << ZIO_STAGE_READY) | \ 157 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 158 (1U << ZIO_STAGE_DONE)) 159 160 #define ZIO_CLAIM_PIPELINE \ 161 ((1U << ZIO_STAGE_OPEN) | \ 162 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 163 (1U << ZIO_STAGE_GANG_PIPELINE) | \ 164 (1U << ZIO_STAGE_GET_GANG_HEADER) | \ 165 (1U << ZIO_STAGE_CLAIM_GANG_MEMBERS) | \ 166 (1U << ZIO_STAGE_DVA_CLAIM) | \ 167 (1U << ZIO_STAGE_READY) | \ 168 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 169 (1U << ZIO_STAGE_DONE)) 170 171 #define ZIO_IOCTL_PIPELINE \ 172 ((1U << ZIO_STAGE_OPEN) | \ 173 (1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 174 (1U << ZIO_STAGE_READY) | \ 175 ZIO_VDEV_IO_PIPELINE | \ 176 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 177 (1U << ZIO_STAGE_DONE)) 178 179 #define ZIO_WAIT_FOR_CHILDREN_PIPELINE \ 180 ((1U << ZIO_STAGE_WAIT_CHILDREN_READY) | \ 181 (1U << ZIO_STAGE_READY) | \ 182 (1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 183 (1U << ZIO_STAGE_DONE)) 184 185 #define ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE \ 186 ((1U << ZIO_STAGE_WAIT_CHILDREN_DONE) | \ 187 (1U << ZIO_STAGE_DONE)) 188 189 #define ZIO_VDEV_CHILD_PIPELINE \ 190 (ZIO_WAIT_FOR_CHILDREN_DONE_PIPELINE | \ 191 ZIO_VDEV_IO_PIPELINE) 192 193 #define ZIO_ERROR_PIPELINE_MASK \ 194 ZIO_WAIT_FOR_CHILDREN_PIPELINE 195 196 struct zio_transform { 197 void *zt_data; 198 uint64_t zt_size; 199 uint64_t zt_bufsize; 200 zio_transform_t *zt_next; 201 }; 202 203 extern void zio_inject_init(void); 204 extern void zio_inject_fini(void); 205 206 #ifdef __cplusplus 207 } 208 #endif 209 210 #endif /* _ZIO_IMPL_H */ 211