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