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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * Copyright (c) 2012 by Delphix. All rights reserved. 28 */ 29 30 #ifndef _ZIO_IMPL_H 31 #define _ZIO_IMPL_H 32 33 #include <sys/zfs_context.h> 34 #include <sys/zio.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * zio pipeline stage definitions 42 */ 43 enum zio_stage { 44 ZIO_STAGE_OPEN = 1 << 0, /* RWFCI */ 45 46 ZIO_STAGE_READ_BP_INIT = 1 << 1, /* R---- */ 47 ZIO_STAGE_FREE_BP_INIT = 1 << 2, /* --F-- */ 48 ZIO_STAGE_ISSUE_ASYNC = 1 << 3, /* RWF-- */ 49 ZIO_STAGE_WRITE_BP_INIT = 1 << 4, /* -W--- */ 50 51 ZIO_STAGE_CHECKSUM_GENERATE = 1 << 5, /* -W--- */ 52 53 ZIO_STAGE_DDT_READ_START = 1 << 6, /* R---- */ 54 ZIO_STAGE_DDT_READ_DONE = 1 << 7, /* R---- */ 55 ZIO_STAGE_DDT_WRITE = 1 << 8, /* -W--- */ 56 ZIO_STAGE_DDT_FREE = 1 << 9, /* --F-- */ 57 58 ZIO_STAGE_GANG_ASSEMBLE = 1 << 10, /* RWFC- */ 59 ZIO_STAGE_GANG_ISSUE = 1 << 11, /* RWFC- */ 60 61 ZIO_STAGE_DVA_ALLOCATE = 1 << 12, /* -W--- */ 62 ZIO_STAGE_DVA_FREE = 1 << 13, /* --F-- */ 63 ZIO_STAGE_DVA_CLAIM = 1 << 14, /* ---C- */ 64 65 ZIO_STAGE_READY = 1 << 15, /* RWFCI */ 66 67 ZIO_STAGE_VDEV_IO_START = 1 << 16, /* RW--I */ 68 ZIO_STAGE_VDEV_IO_DONE = 1 << 17, /* RW--I */ 69 ZIO_STAGE_VDEV_IO_ASSESS = 1 << 18, /* RW--I */ 70 71 ZIO_STAGE_CHECKSUM_VERIFY = 1 << 19, /* R---- */ 72 73 ZIO_STAGE_DONE = 1 << 20 /* RWFCI */ 74 }; 75 76 #define ZIO_INTERLOCK_STAGES \ 77 (ZIO_STAGE_READY | \ 78 ZIO_STAGE_DONE) 79 80 #define ZIO_INTERLOCK_PIPELINE \ 81 ZIO_INTERLOCK_STAGES 82 83 #define ZIO_VDEV_IO_STAGES \ 84 (ZIO_STAGE_VDEV_IO_START | \ 85 ZIO_STAGE_VDEV_IO_DONE | \ 86 ZIO_STAGE_VDEV_IO_ASSESS) 87 88 #define ZIO_VDEV_CHILD_PIPELINE \ 89 (ZIO_VDEV_IO_STAGES | \ 90 ZIO_STAGE_DONE) 91 92 #define ZIO_READ_COMMON_STAGES \ 93 (ZIO_INTERLOCK_STAGES | \ 94 ZIO_VDEV_IO_STAGES | \ 95 ZIO_STAGE_CHECKSUM_VERIFY) 96 97 #define ZIO_READ_PHYS_PIPELINE \ 98 ZIO_READ_COMMON_STAGES 99 100 #define ZIO_READ_PIPELINE \ 101 (ZIO_READ_COMMON_STAGES | \ 102 ZIO_STAGE_READ_BP_INIT) 103 104 #define ZIO_DDT_CHILD_READ_PIPELINE \ 105 ZIO_READ_COMMON_STAGES 106 107 #define ZIO_DDT_READ_PIPELINE \ 108 (ZIO_INTERLOCK_STAGES | \ 109 ZIO_STAGE_READ_BP_INIT | \ 110 ZIO_STAGE_DDT_READ_START | \ 111 ZIO_STAGE_DDT_READ_DONE) 112 113 #define ZIO_WRITE_COMMON_STAGES \ 114 (ZIO_INTERLOCK_STAGES | \ 115 ZIO_VDEV_IO_STAGES | \ 116 ZIO_STAGE_ISSUE_ASYNC | \ 117 ZIO_STAGE_CHECKSUM_GENERATE) 118 119 #define ZIO_WRITE_PHYS_PIPELINE \ 120 ZIO_WRITE_COMMON_STAGES 121 122 #define ZIO_REWRITE_PIPELINE \ 123 (ZIO_WRITE_COMMON_STAGES | \ 124 ZIO_STAGE_WRITE_BP_INIT) 125 126 #define ZIO_WRITE_PIPELINE \ 127 (ZIO_WRITE_COMMON_STAGES | \ 128 ZIO_STAGE_WRITE_BP_INIT | \ 129 ZIO_STAGE_DVA_ALLOCATE) 130 131 #define ZIO_DDT_CHILD_WRITE_PIPELINE \ 132 (ZIO_INTERLOCK_STAGES | \ 133 ZIO_VDEV_IO_STAGES | \ 134 ZIO_STAGE_DVA_ALLOCATE) 135 136 #define ZIO_DDT_WRITE_PIPELINE \ 137 (ZIO_INTERLOCK_STAGES | \ 138 ZIO_STAGE_ISSUE_ASYNC | \ 139 ZIO_STAGE_WRITE_BP_INIT | \ 140 ZIO_STAGE_CHECKSUM_GENERATE | \ 141 ZIO_STAGE_DDT_WRITE) 142 143 #define ZIO_GANG_STAGES \ 144 (ZIO_STAGE_GANG_ASSEMBLE | \ 145 ZIO_STAGE_GANG_ISSUE) 146 147 #define ZIO_FREE_PIPELINE \ 148 (ZIO_INTERLOCK_STAGES | \ 149 ZIO_STAGE_FREE_BP_INIT | \ 150 ZIO_STAGE_ISSUE_ASYNC | \ 151 ZIO_STAGE_DVA_FREE) 152 153 #define ZIO_DDT_FREE_PIPELINE \ 154 (ZIO_INTERLOCK_STAGES | \ 155 ZIO_STAGE_FREE_BP_INIT | \ 156 ZIO_STAGE_ISSUE_ASYNC | \ 157 ZIO_STAGE_DDT_FREE) 158 159 #define ZIO_CLAIM_PIPELINE \ 160 (ZIO_INTERLOCK_STAGES | \ 161 ZIO_STAGE_DVA_CLAIM) 162 163 #define ZIO_IOCTL_PIPELINE \ 164 (ZIO_INTERLOCK_STAGES | \ 165 ZIO_STAGE_VDEV_IO_START | \ 166 ZIO_STAGE_VDEV_IO_ASSESS) 167 168 #define ZIO_BLOCKING_STAGES \ 169 (ZIO_STAGE_DVA_ALLOCATE | \ 170 ZIO_STAGE_DVA_CLAIM | \ 171 ZIO_STAGE_VDEV_IO_START) 172 173 extern void zio_inject_init(void); 174 extern void zio_inject_fini(void); 175 176 #ifdef __cplusplus 177 } 178 #endif 179 180 #endif /* _ZIO_IMPL_H */ 181