1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5441d80aaSlling * Common Development and Distribution License (the "License"). 6441d80aaSlling * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 2298d1cbfeSGeorge Wilson * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 2381cd5c55SMatthew Ahrens * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #ifndef _SYS_VDEV_IMPL_H 27fa9e4066Sahrens #define _SYS_VDEV_IMPL_H 28fa9e4066Sahrens 29fa9e4066Sahrens #include <sys/avl.h> 30*5cabbc6bSPrashanth Sreenivasa #include <sys/bpobj.h> 31fa9e4066Sahrens #include <sys/dmu.h> 32fa9e4066Sahrens #include <sys/metaslab.h> 33fa9e4066Sahrens #include <sys/nvpair.h> 34fa9e4066Sahrens #include <sys/space_map.h> 35fa9e4066Sahrens #include <sys/vdev.h> 36fa9e4066Sahrens #include <sys/dkio.h> 37fa9e4066Sahrens #include <sys/uberblock_impl.h> 38*5cabbc6bSPrashanth Sreenivasa #include <sys/vdev_indirect_mapping.h> 39*5cabbc6bSPrashanth Sreenivasa #include <sys/vdev_indirect_births.h> 40*5cabbc6bSPrashanth Sreenivasa #include <sys/vdev_removal.h> 41fa9e4066Sahrens 42fa9e4066Sahrens #ifdef __cplusplus 43fa9e4066Sahrens extern "C" { 44fa9e4066Sahrens #endif 45fa9e4066Sahrens 46fa9e4066Sahrens /* 47fa9e4066Sahrens * Virtual device descriptors. 48fa9e4066Sahrens * 49fa9e4066Sahrens * All storage pool operations go through the virtual device framework, 50fa9e4066Sahrens * which provides data replication and I/O scheduling. 51fa9e4066Sahrens */ 52fa9e4066Sahrens 53fa9e4066Sahrens /* 54fa9e4066Sahrens * Forward declarations that lots of things need. 55fa9e4066Sahrens */ 56fa9e4066Sahrens typedef struct vdev_queue vdev_queue_t; 57fa9e4066Sahrens typedef struct vdev_cache vdev_cache_t; 58fa9e4066Sahrens typedef struct vdev_cache_entry vdev_cache_entry_t; 59770499e1SDan Kimmel struct abd; 60fa9e4066Sahrens 610f7643c7SGeorge Wilson extern int zfs_vdev_queue_depth_pct; 620f7643c7SGeorge Wilson extern uint32_t zfs_vdev_async_write_max_active; 630f7643c7SGeorge Wilson 64fa9e4066Sahrens /* 65fa9e4066Sahrens * Virtual device operations 66fa9e4066Sahrens */ 674263d13fSGeorge Wilson typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *max_size, 684263d13fSGeorge Wilson uint64_t *ashift); 69fa9e4066Sahrens typedef void vdev_close_func_t(vdev_t *vd); 70fa9e4066Sahrens typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize); 71738f37bcSGeorge Wilson typedef void vdev_io_start_func_t(zio_t *zio); 72e14bb325SJeff Bonwick typedef void vdev_io_done_func_t(zio_t *zio); 73fa9e4066Sahrens typedef void vdev_state_change_func_t(vdev_t *vd, int, int); 74dcba9f3fSGeorge Wilson typedef void vdev_hold_func_t(vdev_t *vd); 75dcba9f3fSGeorge Wilson typedef void vdev_rele_func_t(vdev_t *vd); 76fa9e4066Sahrens 77*5cabbc6bSPrashanth Sreenivasa typedef void vdev_remap_cb_t(uint64_t inner_offset, vdev_t *vd, 78*5cabbc6bSPrashanth Sreenivasa uint64_t offset, uint64_t size, void *arg); 79*5cabbc6bSPrashanth Sreenivasa typedef void vdev_remap_func_t(vdev_t *vd, uint64_t offset, uint64_t size, 80*5cabbc6bSPrashanth Sreenivasa vdev_remap_cb_t callback, void *arg); 81*5cabbc6bSPrashanth Sreenivasa 82fa9e4066Sahrens typedef struct vdev_ops { 83fa9e4066Sahrens vdev_open_func_t *vdev_op_open; 84fa9e4066Sahrens vdev_close_func_t *vdev_op_close; 85fa9e4066Sahrens vdev_asize_func_t *vdev_op_asize; 86fa9e4066Sahrens vdev_io_start_func_t *vdev_op_io_start; 87fa9e4066Sahrens vdev_io_done_func_t *vdev_op_io_done; 88fa9e4066Sahrens vdev_state_change_func_t *vdev_op_state_change; 89dcba9f3fSGeorge Wilson vdev_hold_func_t *vdev_op_hold; 90dcba9f3fSGeorge Wilson vdev_rele_func_t *vdev_op_rele; 91*5cabbc6bSPrashanth Sreenivasa vdev_remap_func_t *vdev_op_remap; 92fa9e4066Sahrens char vdev_op_type[16]; 93fa9e4066Sahrens boolean_t vdev_op_leaf; 94fa9e4066Sahrens } vdev_ops_t; 95fa9e4066Sahrens 96fa9e4066Sahrens /* 97fa9e4066Sahrens * Virtual device properties 98fa9e4066Sahrens */ 99fa9e4066Sahrens struct vdev_cache_entry { 100770499e1SDan Kimmel struct abd *ve_abd; 101fa9e4066Sahrens uint64_t ve_offset; 102fa9e4066Sahrens uint64_t ve_lastused; 103fa9e4066Sahrens avl_node_t ve_offset_node; 104fa9e4066Sahrens avl_node_t ve_lastused_node; 105fa9e4066Sahrens uint32_t ve_hits; 106fa9e4066Sahrens uint16_t ve_missed_update; 107fa9e4066Sahrens zio_t *ve_fill_io; 108fa9e4066Sahrens }; 109fa9e4066Sahrens 110fa9e4066Sahrens struct vdev_cache { 111fa9e4066Sahrens avl_tree_t vc_offset_tree; 112fa9e4066Sahrens avl_tree_t vc_lastused_tree; 113fa9e4066Sahrens kmutex_t vc_lock; 114fa9e4066Sahrens }; 115fa9e4066Sahrens 11669962b56SMatthew Ahrens typedef struct vdev_queue_class { 11769962b56SMatthew Ahrens uint32_t vqc_active; 11869962b56SMatthew Ahrens 11969962b56SMatthew Ahrens /* 12069962b56SMatthew Ahrens * Sorted by offset or timestamp, depending on if the queue is 12169962b56SMatthew Ahrens * LBA-ordered vs FIFO. 12269962b56SMatthew Ahrens */ 12369962b56SMatthew Ahrens avl_tree_t vqc_queued_tree; 12469962b56SMatthew Ahrens } vdev_queue_class_t; 12569962b56SMatthew Ahrens 126fa9e4066Sahrens struct vdev_queue { 12769962b56SMatthew Ahrens vdev_t *vq_vdev; 12869962b56SMatthew Ahrens vdev_queue_class_t vq_class[ZIO_PRIORITY_NUM_QUEUEABLE]; 12969962b56SMatthew Ahrens avl_tree_t vq_active_tree; 130fe319232SJustin T. Gibbs avl_tree_t vq_read_offset_tree; 131fe319232SJustin T. Gibbs avl_tree_t vq_write_offset_tree; 13269962b56SMatthew Ahrens uint64_t vq_last_offset; 13369962b56SMatthew Ahrens hrtime_t vq_io_complete_ts; /* time last i/o completed */ 134fa9e4066Sahrens kmutex_t vq_lock; 135fa9e4066Sahrens }; 136fa9e4066Sahrens 137fa9e4066Sahrens /* 138*5cabbc6bSPrashanth Sreenivasa * On-disk indirect vdev state. 139*5cabbc6bSPrashanth Sreenivasa * 140*5cabbc6bSPrashanth Sreenivasa * An indirect vdev is described exclusively in the MOS config of a pool. 141*5cabbc6bSPrashanth Sreenivasa * The config for an indirect vdev includes several fields, which are 142*5cabbc6bSPrashanth Sreenivasa * accessed in memory by a vdev_indirect_config_t. 143*5cabbc6bSPrashanth Sreenivasa */ 144*5cabbc6bSPrashanth Sreenivasa typedef struct vdev_indirect_config { 145*5cabbc6bSPrashanth Sreenivasa /* 146*5cabbc6bSPrashanth Sreenivasa * Object (in MOS) which contains the indirect mapping. This object 147*5cabbc6bSPrashanth Sreenivasa * contains an array of vdev_indirect_mapping_entry_phys_t ordered by 148*5cabbc6bSPrashanth Sreenivasa * vimep_src. The bonus buffer for this object is a 149*5cabbc6bSPrashanth Sreenivasa * vdev_indirect_mapping_phys_t. This object is allocated when a vdev 150*5cabbc6bSPrashanth Sreenivasa * removal is initiated. 151*5cabbc6bSPrashanth Sreenivasa * 152*5cabbc6bSPrashanth Sreenivasa * Note that this object can be empty if none of the data on the vdev 153*5cabbc6bSPrashanth Sreenivasa * has been copied yet. 154*5cabbc6bSPrashanth Sreenivasa */ 155*5cabbc6bSPrashanth Sreenivasa uint64_t vic_mapping_object; 156*5cabbc6bSPrashanth Sreenivasa 157*5cabbc6bSPrashanth Sreenivasa /* 158*5cabbc6bSPrashanth Sreenivasa * Object (in MOS) which contains the birth times for the mapping 159*5cabbc6bSPrashanth Sreenivasa * entries. This object contains an array of 160*5cabbc6bSPrashanth Sreenivasa * vdev_indirect_birth_entry_phys_t sorted by vibe_offset. The bonus 161*5cabbc6bSPrashanth Sreenivasa * buffer for this object is a vdev_indirect_birth_phys_t. This object 162*5cabbc6bSPrashanth Sreenivasa * is allocated when a vdev removal is initiated. 163*5cabbc6bSPrashanth Sreenivasa * 164*5cabbc6bSPrashanth Sreenivasa * Note that this object can be empty if none of the vdev has yet been 165*5cabbc6bSPrashanth Sreenivasa * copied. 166*5cabbc6bSPrashanth Sreenivasa */ 167*5cabbc6bSPrashanth Sreenivasa uint64_t vic_births_object; 168*5cabbc6bSPrashanth Sreenivasa 169*5cabbc6bSPrashanth Sreenivasa /* 170*5cabbc6bSPrashanth Sreenivasa * This is the vdev ID which was removed previous to this vdev, or 171*5cabbc6bSPrashanth Sreenivasa * UINT64_MAX if there are no previously removed vdevs. 172*5cabbc6bSPrashanth Sreenivasa */ 173*5cabbc6bSPrashanth Sreenivasa uint64_t vic_prev_indirect_vdev; 174*5cabbc6bSPrashanth Sreenivasa } vdev_indirect_config_t; 175*5cabbc6bSPrashanth Sreenivasa 176*5cabbc6bSPrashanth Sreenivasa /* 177fa9e4066Sahrens * Virtual device descriptor 178fa9e4066Sahrens */ 179fa9e4066Sahrens struct vdev { 180fa9e4066Sahrens /* 181fa9e4066Sahrens * Common to all vdev types. 182fa9e4066Sahrens */ 183fa9e4066Sahrens uint64_t vdev_id; /* child number in vdev parent */ 184fa9e4066Sahrens uint64_t vdev_guid; /* unique ID for this vdev */ 185fa9e4066Sahrens uint64_t vdev_guid_sum; /* self guid + all child guids */ 1861195e687SMark J Musante uint64_t vdev_orig_guid; /* orig. guid prior to remove */ 187fa9e4066Sahrens uint64_t vdev_asize; /* allocatable device capacity */ 188573ca77eSGeorge Wilson uint64_t vdev_min_asize; /* min acceptable asize */ 1894263d13fSGeorge Wilson uint64_t vdev_max_asize; /* max acceptable asize */ 190fa9e4066Sahrens uint64_t vdev_ashift; /* block alignment shift */ 191fa9e4066Sahrens uint64_t vdev_state; /* see VDEV_STATE_* #defines */ 192560e6e96Seschrock uint64_t vdev_prevstate; /* used when reopening a vdev */ 193fa9e4066Sahrens vdev_ops_t *vdev_ops; /* vdev operations */ 194fa9e4066Sahrens spa_t *vdev_spa; /* spa for this vdev */ 195fa9e4066Sahrens void *vdev_tsd; /* type-specific data */ 196dcba9f3fSGeorge Wilson vnode_t *vdev_name_vp; /* vnode for pathname */ 197dcba9f3fSGeorge Wilson vnode_t *vdev_devid_vp; /* vnode for devid */ 198fa9e4066Sahrens vdev_t *vdev_top; /* top-level vdev */ 199fa9e4066Sahrens vdev_t *vdev_parent; /* parent vdev */ 200fa9e4066Sahrens vdev_t **vdev_child; /* array of children */ 201fa9e4066Sahrens uint64_t vdev_children; /* number of children */ 202fa9e4066Sahrens vdev_stat_t vdev_stat; /* virtual device statistics */ 203573ca77eSGeorge Wilson boolean_t vdev_expanding; /* expand the vdev? */ 204095bcd66SGeorge Wilson boolean_t vdev_reopening; /* reopen in progress? */ 205f64c0e34SEric Taylor int vdev_open_error; /* error on last open */ 206f64c0e34SEric Taylor kthread_t *vdev_open_thread; /* thread opening children */ 20788ecc943SGeorge Wilson uint64_t vdev_crtxg; /* txg when top-level was added */ 208fa9e4066Sahrens 209fa9e4066Sahrens /* 210fa9e4066Sahrens * Top-level vdev state. 211fa9e4066Sahrens */ 212fa9e4066Sahrens uint64_t vdev_ms_array; /* metaslab array object */ 213fa9e4066Sahrens uint64_t vdev_ms_shift; /* metaslab size shift */ 214fa9e4066Sahrens uint64_t vdev_ms_count; /* number of metaslabs */ 215fa9e4066Sahrens metaslab_group_t *vdev_mg; /* metaslab group */ 216fa9e4066Sahrens metaslab_t **vdev_ms; /* metaslab array */ 217fa9e4066Sahrens txg_list_t vdev_ms_list; /* per-txg dirty metaslab lists */ 218fa9e4066Sahrens txg_list_t vdev_dtl_list; /* per-txg dirty DTL lists */ 219fa9e4066Sahrens txg_node_t vdev_txg_node; /* per-txg dirty vdev linkage */ 2203d7072f8Seschrock boolean_t vdev_remove_wanted; /* async remove wanted? */ 221e14bb325SJeff Bonwick boolean_t vdev_probe_wanted; /* async probe wanted? */ 222e14bb325SJeff Bonwick list_node_t vdev_config_dirty_node; /* config dirty list */ 223e14bb325SJeff Bonwick list_node_t vdev_state_dirty_node; /* state dirty list */ 22499653d4eSeschrock uint64_t vdev_deflate_ratio; /* deflation ratio (x512) */ 2258654d025Sperrin uint64_t vdev_islog; /* is an intent log device */ 2260713e232SGeorge Wilson uint64_t vdev_removing; /* device is being removed? */ 2270713e232SGeorge Wilson boolean_t vdev_ishole; /* is a hole in the namespace */ 2280f7643c7SGeorge Wilson kmutex_t vdev_queue_lock; /* protects vdev_queue_depth */ 229215198a6SJoe Stein uint64_t vdev_top_zap; 230fa9e4066Sahrens 231fa9e4066Sahrens /* 232*5cabbc6bSPrashanth Sreenivasa * Values stored in the config for an indirect or removing vdev. 233*5cabbc6bSPrashanth Sreenivasa */ 234*5cabbc6bSPrashanth Sreenivasa vdev_indirect_config_t vdev_indirect_config; 235*5cabbc6bSPrashanth Sreenivasa 236*5cabbc6bSPrashanth Sreenivasa /* 237*5cabbc6bSPrashanth Sreenivasa * The vdev_indirect_rwlock protects the vdev_indirect_mapping 238*5cabbc6bSPrashanth Sreenivasa * pointer from changing on indirect vdevs (when it is condensed). 239*5cabbc6bSPrashanth Sreenivasa * Note that removing (not yet indirect) vdevs have different 240*5cabbc6bSPrashanth Sreenivasa * access patterns (the mapping is not accessed from open context, 241*5cabbc6bSPrashanth Sreenivasa * e.g. from zio_read) and locking strategy (e.g. svr_lock). 242*5cabbc6bSPrashanth Sreenivasa */ 243*5cabbc6bSPrashanth Sreenivasa krwlock_t vdev_indirect_rwlock; 244*5cabbc6bSPrashanth Sreenivasa vdev_indirect_mapping_t *vdev_indirect_mapping; 245*5cabbc6bSPrashanth Sreenivasa vdev_indirect_births_t *vdev_indirect_births; 246*5cabbc6bSPrashanth Sreenivasa 247*5cabbc6bSPrashanth Sreenivasa /* 248*5cabbc6bSPrashanth Sreenivasa * In memory data structures used to manage the obsolete sm, for 249*5cabbc6bSPrashanth Sreenivasa * indirect or removing vdevs. 250*5cabbc6bSPrashanth Sreenivasa * 251*5cabbc6bSPrashanth Sreenivasa * The vdev_obsolete_segments is the in-core record of the segments 252*5cabbc6bSPrashanth Sreenivasa * that are no longer referenced anywhere in the pool (due to 253*5cabbc6bSPrashanth Sreenivasa * being freed or remapped and not referenced by any snapshots). 254*5cabbc6bSPrashanth Sreenivasa * During a sync, segments are added to vdev_obsolete_segments 255*5cabbc6bSPrashanth Sreenivasa * via vdev_indirect_mark_obsolete(); at the end of each sync 256*5cabbc6bSPrashanth Sreenivasa * pass, this is appended to vdev_obsolete_sm via 257*5cabbc6bSPrashanth Sreenivasa * vdev_indirect_sync_obsolete(). The vdev_obsolete_lock 258*5cabbc6bSPrashanth Sreenivasa * protects against concurrent modifications of vdev_obsolete_segments 259*5cabbc6bSPrashanth Sreenivasa * from multiple zio threads. 260*5cabbc6bSPrashanth Sreenivasa */ 261*5cabbc6bSPrashanth Sreenivasa kmutex_t vdev_obsolete_lock; 262*5cabbc6bSPrashanth Sreenivasa range_tree_t *vdev_obsolete_segments; 263*5cabbc6bSPrashanth Sreenivasa space_map_t *vdev_obsolete_sm; 264*5cabbc6bSPrashanth Sreenivasa 265*5cabbc6bSPrashanth Sreenivasa /* 2660f7643c7SGeorge Wilson * The queue depth parameters determine how many async writes are 2670f7643c7SGeorge Wilson * still pending (i.e. allocated by net yet issued to disk) per 2680f7643c7SGeorge Wilson * top-level (vdev_async_write_queue_depth) and the maximum allowed 2690f7643c7SGeorge Wilson * (vdev_max_async_write_queue_depth). These values only apply to 2700f7643c7SGeorge Wilson * top-level vdevs. 2710f7643c7SGeorge Wilson */ 2720f7643c7SGeorge Wilson uint64_t vdev_async_write_queue_depth; 2730f7643c7SGeorge Wilson uint64_t vdev_max_async_write_queue_depth; 2740f7643c7SGeorge Wilson 2750f7643c7SGeorge Wilson /* 276fa9e4066Sahrens * Leaf vdev state. 277fa9e4066Sahrens */ 2780713e232SGeorge Wilson range_tree_t *vdev_dtl[DTL_TYPES]; /* dirty time logs */ 2790713e232SGeorge Wilson space_map_t *vdev_dtl_sm; /* dirty time log space map */ 280fa9e4066Sahrens txg_node_t vdev_dtl_node; /* per-txg dirty DTL linkage */ 2810713e232SGeorge Wilson uint64_t vdev_dtl_object; /* DTL object */ 2820713e232SGeorge Wilson uint64_t vdev_psize; /* physical device capacity */ 283afefbcddSeschrock uint64_t vdev_wholedisk; /* true if this is a whole disk */ 2843d7072f8Seschrock uint64_t vdev_offline; /* persistent offline state */ 2853d7072f8Seschrock uint64_t vdev_faulted; /* persistent faulted state */ 2863d7072f8Seschrock uint64_t vdev_degraded; /* persistent degraded state */ 2873d7072f8Seschrock uint64_t vdev_removed; /* persistent removed state */ 288b4952e17SGeorge Wilson uint64_t vdev_resilver_txg; /* persistent resilvering state */ 28999653d4eSeschrock uint64_t vdev_nparity; /* number of parity devices for raidz */ 290fa9e4066Sahrens char *vdev_path; /* vdev path (if any) */ 291fa9e4066Sahrens char *vdev_devid; /* vdev devid (if any) */ 2923d7072f8Seschrock char *vdev_physpath; /* vdev device path (if any) */ 2936809eb4eSEric Schrock char *vdev_fru; /* physical FRU location */ 294e14bb325SJeff Bonwick uint64_t vdev_not_present; /* not present during import */ 295e14bb325SJeff Bonwick uint64_t vdev_unspare; /* unspare when resilvering done */ 296e14bb325SJeff Bonwick boolean_t vdev_nowritecache; /* true if flushwritecache failed */ 297e14bb325SJeff Bonwick boolean_t vdev_checkremove; /* temporary online test */ 298e14bb325SJeff Bonwick boolean_t vdev_forcefault; /* force online fault */ 2991195e687SMark J Musante boolean_t vdev_splitting; /* split or repair in progress */ 30098d1cbfeSGeorge Wilson boolean_t vdev_delayed_close; /* delayed device close? */ 3010713e232SGeorge Wilson boolean_t vdev_tmpoffline; /* device taken offline temporarily? */ 3020713e232SGeorge Wilson boolean_t vdev_detached; /* device detached? */ 3030713e232SGeorge Wilson boolean_t vdev_cant_read; /* vdev is failing all reads */ 3040713e232SGeorge Wilson boolean_t vdev_cant_write; /* vdev is failing all writes */ 3050713e232SGeorge Wilson boolean_t vdev_isspare; /* was a hot spare */ 3060713e232SGeorge Wilson boolean_t vdev_isl2cache; /* was a l2cache device */ 307fa9e4066Sahrens vdev_queue_t vdev_queue; /* I/O deadline schedule queue */ 308fa9e4066Sahrens vdev_cache_t vdev_cache; /* physical block cache */ 30981cd5c55SMatthew Ahrens spa_aux_vdev_t *vdev_aux; /* for l2cache and spares vdevs */ 310e14bb325SJeff Bonwick zio_t *vdev_probe_zio; /* root of current probe */ 311069f55e2SEric Schrock vdev_aux_t vdev_label_aux; /* on-disk aux state */ 312215198a6SJoe Stein uint64_t vdev_leaf_zap; 313fa9e4066Sahrens 314fa9e4066Sahrens /* 315fa9e4066Sahrens * For DTrace to work in userland (libzpool) context, these fields must 316fa9e4066Sahrens * remain at the end of the structure. DTrace will use the kernel's 317fa9e4066Sahrens * CTF definition for 'struct vdev', and since the size of a kmutex_t is 318ad135b5dSChristopher Siden * larger in userland, the offsets for the rest of the fields would be 319fa9e4066Sahrens * incorrect. 320fa9e4066Sahrens */ 321fa9e4066Sahrens kmutex_t vdev_dtl_lock; /* vdev_dtl_{map,resilver} */ 322fa9e4066Sahrens kmutex_t vdev_stat_lock; /* vdev_stat */ 323e14bb325SJeff Bonwick kmutex_t vdev_probe_lock; /* protects vdev_probe_zio */ 324fa9e4066Sahrens }; 325fa9e4066Sahrens 326b24ab676SJeff Bonwick #define VDEV_RAIDZ_MAXPARITY 3 327b24ab676SJeff Bonwick 328f83ffe1aSLin Ling #define VDEV_PAD_SIZE (8 << 10) 329f83ffe1aSLin Ling /* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 330f83ffe1aSLin Ling #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 331fa9e4066Sahrens #define VDEV_PHYS_SIZE (112 << 10) 332ecc2d604Sbonwick #define VDEV_UBERBLOCK_RING (128 << 10) 333ecc2d604Sbonwick 3342a104a52SAlex Reece /* The largest uberblock we support is 8k. */ 3352a104a52SAlex Reece #define MAX_UBERBLOCK_SHIFT (13) 336ecc2d604Sbonwick #define VDEV_UBERBLOCK_SHIFT(vd) \ 3372a104a52SAlex Reece MIN(MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT), \ 3382a104a52SAlex Reece MAX_UBERBLOCK_SHIFT) 339ecc2d604Sbonwick #define VDEV_UBERBLOCK_COUNT(vd) \ 340ecc2d604Sbonwick (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd)) 341ecc2d604Sbonwick #define VDEV_UBERBLOCK_OFFSET(vd, n) \ 342ecc2d604Sbonwick offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)]) 343ecc2d604Sbonwick #define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd)) 344fa9e4066Sahrens 345fa9e4066Sahrens typedef struct vdev_phys { 3466e1f5caaSNeil Perrin char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 3476e1f5caaSNeil Perrin zio_eck_t vp_zbt; 348fa9e4066Sahrens } vdev_phys_t; 349fa9e4066Sahrens 350fa9e4066Sahrens typedef struct vdev_label { 351f83ffe1aSLin Ling char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 352f83ffe1aSLin Ling char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 3533dd27b57Stabriz vdev_phys_t vl_vdev_phys; /* 112K */ 354ecc2d604Sbonwick char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 355fa9e4066Sahrens } vdev_label_t; /* 256K total */ 356fa9e4066Sahrens 357fa9e4066Sahrens /* 358ecc2d604Sbonwick * vdev_dirty() flags 359ecc2d604Sbonwick */ 360ecc2d604Sbonwick #define VDD_METASLAB 0x01 361ecc2d604Sbonwick #define VDD_DTL 0x02 362ecc2d604Sbonwick 363f7170741SWill Andrews /* Offset of embedded boot loader region on each label */ 364f7170741SWill Andrews #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 365ecc2d604Sbonwick /* 366f7170741SWill Andrews * Size of embedded boot loader region on each label. 367fa9e4066Sahrens * The total size of the first two labels plus the boot area is 4MB. 368fa9e4066Sahrens */ 369fa9e4066Sahrens #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 370fa9e4066Sahrens 371fa9e4066Sahrens /* 372fa9e4066Sahrens * Size of label regions at the start and end of each leaf device. 373fa9e4066Sahrens */ 374fa9e4066Sahrens #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 375fa9e4066Sahrens #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 376fa9e4066Sahrens #define VDEV_LABELS 4 377ad135b5dSChristopher Siden #define VDEV_BEST_LABEL VDEV_LABELS 378fa9e4066Sahrens 379fa9e4066Sahrens #define VDEV_ALLOC_LOAD 0 380fa9e4066Sahrens #define VDEV_ALLOC_ADD 1 38199653d4eSeschrock #define VDEV_ALLOC_SPARE 2 382fa94a07fSbrendan #define VDEV_ALLOC_L2CACHE 3 38321ecdf64SLin Ling #define VDEV_ALLOC_ROOTPOOL 4 3841195e687SMark J Musante #define VDEV_ALLOC_SPLIT 5 385cd0837ccSGeorge Wilson #define VDEV_ALLOC_ATTACH 6 386fa9e4066Sahrens 387fa9e4066Sahrens /* 388fa9e4066Sahrens * Allocate or free a vdev 389fa9e4066Sahrens */ 39088ecc943SGeorge Wilson extern vdev_t *vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, 39188ecc943SGeorge Wilson vdev_ops_t *ops); 39299653d4eSeschrock extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config, 39399653d4eSeschrock vdev_t *parent, uint_t id, int alloctype); 394fa9e4066Sahrens extern void vdev_free(vdev_t *vd); 395fa9e4066Sahrens 396fa9e4066Sahrens /* 397fa9e4066Sahrens * Add or remove children and parents 398fa9e4066Sahrens */ 399fa9e4066Sahrens extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd); 400fa9e4066Sahrens extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd); 401fa9e4066Sahrens extern void vdev_compact_children(vdev_t *pvd); 402fa9e4066Sahrens extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops); 403fa9e4066Sahrens extern void vdev_remove_parent(vdev_t *cvd); 404fa9e4066Sahrens 405fa9e4066Sahrens /* 406fa9e4066Sahrens * vdev sync load and sync 407fa9e4066Sahrens */ 40888ecc943SGeorge Wilson extern void vdev_load_log_state(vdev_t *nvd, vdev_t *ovd); 4094b964adaSGeorge Wilson extern boolean_t vdev_log_state_valid(vdev_t *vd); 410*5cabbc6bSPrashanth Sreenivasa extern int vdev_load(vdev_t *vd); 4110713e232SGeorge Wilson extern int vdev_dtl_load(vdev_t *vd); 412fa9e4066Sahrens extern void vdev_sync(vdev_t *vd, uint64_t txg); 413fa9e4066Sahrens extern void vdev_sync_done(vdev_t *vd, uint64_t txg); 414ecc2d604Sbonwick extern void vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg); 4150713e232SGeorge Wilson extern void vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg); 416fa9e4066Sahrens 417fa9e4066Sahrens /* 418fa9e4066Sahrens * Available vdev types. 419fa9e4066Sahrens */ 420fa9e4066Sahrens extern vdev_ops_t vdev_root_ops; 421fa9e4066Sahrens extern vdev_ops_t vdev_mirror_ops; 422fa9e4066Sahrens extern vdev_ops_t vdev_replacing_ops; 423fa9e4066Sahrens extern vdev_ops_t vdev_raidz_ops; 424fa9e4066Sahrens extern vdev_ops_t vdev_disk_ops; 425fa9e4066Sahrens extern vdev_ops_t vdev_file_ops; 426fa9e4066Sahrens extern vdev_ops_t vdev_missing_ops; 42788ecc943SGeorge Wilson extern vdev_ops_t vdev_hole_ops; 42899653d4eSeschrock extern vdev_ops_t vdev_spare_ops; 429*5cabbc6bSPrashanth Sreenivasa extern vdev_ops_t vdev_indirect_ops; 430fa9e4066Sahrens 431fa9e4066Sahrens /* 4322a79c5feSlling * Common size functions 433fa9e4066Sahrens */ 434fa9e4066Sahrens extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize); 435573ca77eSGeorge Wilson extern uint64_t vdev_get_min_asize(vdev_t *vd); 436573ca77eSGeorge Wilson extern void vdev_set_min_asize(vdev_t *vd); 437fa9e4066Sahrens 438e81c57b1Sahrens /* 439f7170741SWill Andrews * Global variables 440e81c57b1Sahrens */ 441f7170741SWill Andrews /* zdb uses this tunable, so it must be declared here to make lint happy. */ 442e81c57b1Sahrens extern int zfs_vdev_cache_size; 443e81c57b1Sahrens 44431d7e8faSGeorge Wilson /* 445*5cabbc6bSPrashanth Sreenivasa * Functions from vdev_indirect.c 446*5cabbc6bSPrashanth Sreenivasa */ 447*5cabbc6bSPrashanth Sreenivasa extern void vdev_indirect_sync_obsolete(vdev_t *vd, dmu_tx_t *tx); 448*5cabbc6bSPrashanth Sreenivasa extern boolean_t vdev_indirect_should_condense(vdev_t *vd); 449*5cabbc6bSPrashanth Sreenivasa extern void spa_condense_indirect_start_sync(vdev_t *vd, dmu_tx_t *tx); 450*5cabbc6bSPrashanth Sreenivasa extern int vdev_obsolete_sm_object(vdev_t *vd); 451*5cabbc6bSPrashanth Sreenivasa extern boolean_t vdev_obsolete_counts_are_precise(vdev_t *vd); 452*5cabbc6bSPrashanth Sreenivasa 453*5cabbc6bSPrashanth Sreenivasa /* 45431d7e8faSGeorge Wilson * The vdev_buf_t is used to translate between zio_t and buf_t, and back again. 45531d7e8faSGeorge Wilson */ 45631d7e8faSGeorge Wilson typedef struct vdev_buf { 45731d7e8faSGeorge Wilson buf_t vb_buf; /* buffer that describes the io */ 45831d7e8faSGeorge Wilson zio_t *vb_io; /* pointer back to the original zio_t */ 45931d7e8faSGeorge Wilson } vdev_buf_t; 46031d7e8faSGeorge Wilson 461fa9e4066Sahrens #ifdef __cplusplus 462fa9e4066Sahrens } 463fa9e4066Sahrens #endif 464fa9e4066Sahrens 465fa9e4066Sahrens #endif /* _SYS_VDEV_IMPL_H */ 466