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> 30fa9e4066Sahrens #include <sys/dmu.h> 31fa9e4066Sahrens #include <sys/metaslab.h> 32fa9e4066Sahrens #include <sys/nvpair.h> 33fa9e4066Sahrens #include <sys/space_map.h> 34fa9e4066Sahrens #include <sys/vdev.h> 35fa9e4066Sahrens #include <sys/dkio.h> 36fa9e4066Sahrens #include <sys/uberblock_impl.h> 37fa9e4066Sahrens 38fa9e4066Sahrens #ifdef __cplusplus 39fa9e4066Sahrens extern "C" { 40fa9e4066Sahrens #endif 41fa9e4066Sahrens 42fa9e4066Sahrens /* 43fa9e4066Sahrens * Virtual device descriptors. 44fa9e4066Sahrens * 45fa9e4066Sahrens * All storage pool operations go through the virtual device framework, 46fa9e4066Sahrens * which provides data replication and I/O scheduling. 47fa9e4066Sahrens */ 48fa9e4066Sahrens 49fa9e4066Sahrens /* 50fa9e4066Sahrens * Forward declarations that lots of things need. 51fa9e4066Sahrens */ 52fa9e4066Sahrens typedef struct vdev_queue vdev_queue_t; 53fa9e4066Sahrens typedef struct vdev_cache vdev_cache_t; 54fa9e4066Sahrens typedef struct vdev_cache_entry vdev_cache_entry_t; 55*770499e1SDan Kimmel struct abd; 56fa9e4066Sahrens 570f7643c7SGeorge Wilson extern int zfs_vdev_queue_depth_pct; 580f7643c7SGeorge Wilson extern uint32_t zfs_vdev_async_write_max_active; 590f7643c7SGeorge Wilson 60fa9e4066Sahrens /* 61fa9e4066Sahrens * Virtual device operations 62fa9e4066Sahrens */ 634263d13fSGeorge Wilson typedef int vdev_open_func_t(vdev_t *vd, uint64_t *size, uint64_t *max_size, 644263d13fSGeorge Wilson uint64_t *ashift); 65fa9e4066Sahrens typedef void vdev_close_func_t(vdev_t *vd); 66fa9e4066Sahrens typedef uint64_t vdev_asize_func_t(vdev_t *vd, uint64_t psize); 67738f37bcSGeorge Wilson typedef void vdev_io_start_func_t(zio_t *zio); 68e14bb325SJeff Bonwick typedef void vdev_io_done_func_t(zio_t *zio); 69fa9e4066Sahrens typedef void vdev_state_change_func_t(vdev_t *vd, int, int); 70dcba9f3fSGeorge Wilson typedef void vdev_hold_func_t(vdev_t *vd); 71dcba9f3fSGeorge Wilson typedef void vdev_rele_func_t(vdev_t *vd); 72fa9e4066Sahrens 73fa9e4066Sahrens typedef struct vdev_ops { 74fa9e4066Sahrens vdev_open_func_t *vdev_op_open; 75fa9e4066Sahrens vdev_close_func_t *vdev_op_close; 76fa9e4066Sahrens vdev_asize_func_t *vdev_op_asize; 77fa9e4066Sahrens vdev_io_start_func_t *vdev_op_io_start; 78fa9e4066Sahrens vdev_io_done_func_t *vdev_op_io_done; 79fa9e4066Sahrens vdev_state_change_func_t *vdev_op_state_change; 80dcba9f3fSGeorge Wilson vdev_hold_func_t *vdev_op_hold; 81dcba9f3fSGeorge Wilson vdev_rele_func_t *vdev_op_rele; 82fa9e4066Sahrens char vdev_op_type[16]; 83fa9e4066Sahrens boolean_t vdev_op_leaf; 84fa9e4066Sahrens } vdev_ops_t; 85fa9e4066Sahrens 86fa9e4066Sahrens /* 87fa9e4066Sahrens * Virtual device properties 88fa9e4066Sahrens */ 89fa9e4066Sahrens struct vdev_cache_entry { 90*770499e1SDan Kimmel struct abd *ve_abd; 91fa9e4066Sahrens uint64_t ve_offset; 92fa9e4066Sahrens uint64_t ve_lastused; 93fa9e4066Sahrens avl_node_t ve_offset_node; 94fa9e4066Sahrens avl_node_t ve_lastused_node; 95fa9e4066Sahrens uint32_t ve_hits; 96fa9e4066Sahrens uint16_t ve_missed_update; 97fa9e4066Sahrens zio_t *ve_fill_io; 98fa9e4066Sahrens }; 99fa9e4066Sahrens 100fa9e4066Sahrens struct vdev_cache { 101fa9e4066Sahrens avl_tree_t vc_offset_tree; 102fa9e4066Sahrens avl_tree_t vc_lastused_tree; 103fa9e4066Sahrens kmutex_t vc_lock; 104fa9e4066Sahrens }; 105fa9e4066Sahrens 10669962b56SMatthew Ahrens typedef struct vdev_queue_class { 10769962b56SMatthew Ahrens uint32_t vqc_active; 10869962b56SMatthew Ahrens 10969962b56SMatthew Ahrens /* 11069962b56SMatthew Ahrens * Sorted by offset or timestamp, depending on if the queue is 11169962b56SMatthew Ahrens * LBA-ordered vs FIFO. 11269962b56SMatthew Ahrens */ 11369962b56SMatthew Ahrens avl_tree_t vqc_queued_tree; 11469962b56SMatthew Ahrens } vdev_queue_class_t; 11569962b56SMatthew Ahrens 116fa9e4066Sahrens struct vdev_queue { 11769962b56SMatthew Ahrens vdev_t *vq_vdev; 11869962b56SMatthew Ahrens vdev_queue_class_t vq_class[ZIO_PRIORITY_NUM_QUEUEABLE]; 11969962b56SMatthew Ahrens avl_tree_t vq_active_tree; 120fe319232SJustin T. Gibbs avl_tree_t vq_read_offset_tree; 121fe319232SJustin T. Gibbs avl_tree_t vq_write_offset_tree; 12269962b56SMatthew Ahrens uint64_t vq_last_offset; 12369962b56SMatthew Ahrens hrtime_t vq_io_complete_ts; /* time last i/o completed */ 124fa9e4066Sahrens kmutex_t vq_lock; 125fa9e4066Sahrens }; 126fa9e4066Sahrens 127fa9e4066Sahrens /* 128fa9e4066Sahrens * Virtual device descriptor 129fa9e4066Sahrens */ 130fa9e4066Sahrens struct vdev { 131fa9e4066Sahrens /* 132fa9e4066Sahrens * Common to all vdev types. 133fa9e4066Sahrens */ 134fa9e4066Sahrens uint64_t vdev_id; /* child number in vdev parent */ 135fa9e4066Sahrens uint64_t vdev_guid; /* unique ID for this vdev */ 136fa9e4066Sahrens uint64_t vdev_guid_sum; /* self guid + all child guids */ 1371195e687SMark J Musante uint64_t vdev_orig_guid; /* orig. guid prior to remove */ 138fa9e4066Sahrens uint64_t vdev_asize; /* allocatable device capacity */ 139573ca77eSGeorge Wilson uint64_t vdev_min_asize; /* min acceptable asize */ 1404263d13fSGeorge Wilson uint64_t vdev_max_asize; /* max acceptable asize */ 141fa9e4066Sahrens uint64_t vdev_ashift; /* block alignment shift */ 142fa9e4066Sahrens uint64_t vdev_state; /* see VDEV_STATE_* #defines */ 143560e6e96Seschrock uint64_t vdev_prevstate; /* used when reopening a vdev */ 144fa9e4066Sahrens vdev_ops_t *vdev_ops; /* vdev operations */ 145fa9e4066Sahrens spa_t *vdev_spa; /* spa for this vdev */ 146fa9e4066Sahrens void *vdev_tsd; /* type-specific data */ 147dcba9f3fSGeorge Wilson vnode_t *vdev_name_vp; /* vnode for pathname */ 148dcba9f3fSGeorge Wilson vnode_t *vdev_devid_vp; /* vnode for devid */ 149fa9e4066Sahrens vdev_t *vdev_top; /* top-level vdev */ 150fa9e4066Sahrens vdev_t *vdev_parent; /* parent vdev */ 151fa9e4066Sahrens vdev_t **vdev_child; /* array of children */ 152fa9e4066Sahrens uint64_t vdev_children; /* number of children */ 153fa9e4066Sahrens vdev_stat_t vdev_stat; /* virtual device statistics */ 154573ca77eSGeorge Wilson boolean_t vdev_expanding; /* expand the vdev? */ 155095bcd66SGeorge Wilson boolean_t vdev_reopening; /* reopen in progress? */ 156f64c0e34SEric Taylor int vdev_open_error; /* error on last open */ 157f64c0e34SEric Taylor kthread_t *vdev_open_thread; /* thread opening children */ 15888ecc943SGeorge Wilson uint64_t vdev_crtxg; /* txg when top-level was added */ 159fa9e4066Sahrens 160fa9e4066Sahrens /* 161fa9e4066Sahrens * Top-level vdev state. 162fa9e4066Sahrens */ 163fa9e4066Sahrens uint64_t vdev_ms_array; /* metaslab array object */ 164fa9e4066Sahrens uint64_t vdev_ms_shift; /* metaslab size shift */ 165fa9e4066Sahrens uint64_t vdev_ms_count; /* number of metaslabs */ 166fa9e4066Sahrens metaslab_group_t *vdev_mg; /* metaslab group */ 167fa9e4066Sahrens metaslab_t **vdev_ms; /* metaslab array */ 168fa9e4066Sahrens txg_list_t vdev_ms_list; /* per-txg dirty metaslab lists */ 169fa9e4066Sahrens txg_list_t vdev_dtl_list; /* per-txg dirty DTL lists */ 170fa9e4066Sahrens txg_node_t vdev_txg_node; /* per-txg dirty vdev linkage */ 1713d7072f8Seschrock boolean_t vdev_remove_wanted; /* async remove wanted? */ 172e14bb325SJeff Bonwick boolean_t vdev_probe_wanted; /* async probe wanted? */ 173e14bb325SJeff Bonwick list_node_t vdev_config_dirty_node; /* config dirty list */ 174e14bb325SJeff Bonwick list_node_t vdev_state_dirty_node; /* state dirty list */ 17599653d4eSeschrock uint64_t vdev_deflate_ratio; /* deflation ratio (x512) */ 1768654d025Sperrin uint64_t vdev_islog; /* is an intent log device */ 1770713e232SGeorge Wilson uint64_t vdev_removing; /* device is being removed? */ 1780f7643c7SGeorge Wilson boolean_t vdev_ishole; /* is a hole in the namespace */ 1790f7643c7SGeorge Wilson kmutex_t vdev_queue_lock; /* protects vdev_queue_depth */ 180215198a6SJoe Stein uint64_t vdev_top_zap; 181fa9e4066Sahrens 1820f7643c7SGeorge Wilson /* 1830f7643c7SGeorge Wilson * The queue depth parameters determine how many async writes are 1840f7643c7SGeorge Wilson * still pending (i.e. allocated by net yet issued to disk) per 1850f7643c7SGeorge Wilson * top-level (vdev_async_write_queue_depth) and the maximum allowed 1860f7643c7SGeorge Wilson * (vdev_max_async_write_queue_depth). These values only apply to 1870f7643c7SGeorge Wilson * top-level vdevs. 1880f7643c7SGeorge Wilson */ 1890f7643c7SGeorge Wilson uint64_t vdev_async_write_queue_depth; 1900f7643c7SGeorge Wilson uint64_t vdev_max_async_write_queue_depth; 1910f7643c7SGeorge Wilson 192fa9e4066Sahrens /* 193fa9e4066Sahrens * Leaf vdev state. 194fa9e4066Sahrens */ 1950713e232SGeorge Wilson range_tree_t *vdev_dtl[DTL_TYPES]; /* dirty time logs */ 1960713e232SGeorge Wilson space_map_t *vdev_dtl_sm; /* dirty time log space map */ 197fa9e4066Sahrens txg_node_t vdev_dtl_node; /* per-txg dirty DTL linkage */ 1980713e232SGeorge Wilson uint64_t vdev_dtl_object; /* DTL object */ 1990713e232SGeorge Wilson uint64_t vdev_psize; /* physical device capacity */ 200afefbcddSeschrock uint64_t vdev_wholedisk; /* true if this is a whole disk */ 2013d7072f8Seschrock uint64_t vdev_offline; /* persistent offline state */ 2023d7072f8Seschrock uint64_t vdev_faulted; /* persistent faulted state */ 2033d7072f8Seschrock uint64_t vdev_degraded; /* persistent degraded state */ 2043d7072f8Seschrock uint64_t vdev_removed; /* persistent removed state */ 205b4952e17SGeorge Wilson uint64_t vdev_resilver_txg; /* persistent resilvering state */ 20699653d4eSeschrock uint64_t vdev_nparity; /* number of parity devices for raidz */ 207fa9e4066Sahrens char *vdev_path; /* vdev path (if any) */ 208fa9e4066Sahrens char *vdev_devid; /* vdev devid (if any) */ 2093d7072f8Seschrock char *vdev_physpath; /* vdev device path (if any) */ 2106809eb4eSEric Schrock char *vdev_fru; /* physical FRU location */ 211e14bb325SJeff Bonwick uint64_t vdev_not_present; /* not present during import */ 212e14bb325SJeff Bonwick uint64_t vdev_unspare; /* unspare when resilvering done */ 213e14bb325SJeff Bonwick boolean_t vdev_nowritecache; /* true if flushwritecache failed */ 214e14bb325SJeff Bonwick boolean_t vdev_checkremove; /* temporary online test */ 215e14bb325SJeff Bonwick boolean_t vdev_forcefault; /* force online fault */ 2161195e687SMark J Musante boolean_t vdev_splitting; /* split or repair in progress */ 21798d1cbfeSGeorge Wilson boolean_t vdev_delayed_close; /* delayed device close? */ 2180713e232SGeorge Wilson boolean_t vdev_tmpoffline; /* device taken offline temporarily? */ 2190713e232SGeorge Wilson boolean_t vdev_detached; /* device detached? */ 2200713e232SGeorge Wilson boolean_t vdev_cant_read; /* vdev is failing all reads */ 2210713e232SGeorge Wilson boolean_t vdev_cant_write; /* vdev is failing all writes */ 2220713e232SGeorge Wilson boolean_t vdev_isspare; /* was a hot spare */ 2230713e232SGeorge Wilson boolean_t vdev_isl2cache; /* was a l2cache device */ 224fa9e4066Sahrens vdev_queue_t vdev_queue; /* I/O deadline schedule queue */ 225fa9e4066Sahrens vdev_cache_t vdev_cache; /* physical block cache */ 22681cd5c55SMatthew Ahrens spa_aux_vdev_t *vdev_aux; /* for l2cache and spares vdevs */ 227e14bb325SJeff Bonwick zio_t *vdev_probe_zio; /* root of current probe */ 228069f55e2SEric Schrock vdev_aux_t vdev_label_aux; /* on-disk aux state */ 229215198a6SJoe Stein uint64_t vdev_leaf_zap; 230fa9e4066Sahrens 231fa9e4066Sahrens /* 232fa9e4066Sahrens * For DTrace to work in userland (libzpool) context, these fields must 233fa9e4066Sahrens * remain at the end of the structure. DTrace will use the kernel's 234fa9e4066Sahrens * CTF definition for 'struct vdev', and since the size of a kmutex_t is 235ad135b5dSChristopher Siden * larger in userland, the offsets for the rest of the fields would be 236fa9e4066Sahrens * incorrect. 237fa9e4066Sahrens */ 238fa9e4066Sahrens kmutex_t vdev_dtl_lock; /* vdev_dtl_{map,resilver} */ 239fa9e4066Sahrens kmutex_t vdev_stat_lock; /* vdev_stat */ 240e14bb325SJeff Bonwick kmutex_t vdev_probe_lock; /* protects vdev_probe_zio */ 241fa9e4066Sahrens }; 242fa9e4066Sahrens 243b24ab676SJeff Bonwick #define VDEV_RAIDZ_MAXPARITY 3 244b24ab676SJeff Bonwick 245f83ffe1aSLin Ling #define VDEV_PAD_SIZE (8 << 10) 246f83ffe1aSLin Ling /* 2 padding areas (vl_pad1 and vl_pad2) to skip */ 247f83ffe1aSLin Ling #define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2 248fa9e4066Sahrens #define VDEV_PHYS_SIZE (112 << 10) 249ecc2d604Sbonwick #define VDEV_UBERBLOCK_RING (128 << 10) 250ecc2d604Sbonwick 2512a104a52SAlex Reece /* The largest uberblock we support is 8k. */ 2522a104a52SAlex Reece #define MAX_UBERBLOCK_SHIFT (13) 253ecc2d604Sbonwick #define VDEV_UBERBLOCK_SHIFT(vd) \ 2542a104a52SAlex Reece MIN(MAX((vd)->vdev_top->vdev_ashift, UBERBLOCK_SHIFT), \ 2552a104a52SAlex Reece MAX_UBERBLOCK_SHIFT) 256ecc2d604Sbonwick #define VDEV_UBERBLOCK_COUNT(vd) \ 257ecc2d604Sbonwick (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd)) 258ecc2d604Sbonwick #define VDEV_UBERBLOCK_OFFSET(vd, n) \ 259ecc2d604Sbonwick offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)]) 260ecc2d604Sbonwick #define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd)) 261fa9e4066Sahrens 262fa9e4066Sahrens typedef struct vdev_phys { 2636e1f5caaSNeil Perrin char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)]; 2646e1f5caaSNeil Perrin zio_eck_t vp_zbt; 265fa9e4066Sahrens } vdev_phys_t; 266fa9e4066Sahrens 267fa9e4066Sahrens typedef struct vdev_label { 268f83ffe1aSLin Ling char vl_pad1[VDEV_PAD_SIZE]; /* 8K */ 269f83ffe1aSLin Ling char vl_pad2[VDEV_PAD_SIZE]; /* 8K */ 270ecc2d604Sbonwick vdev_phys_t vl_vdev_phys; /* 112K */ 271ecc2d604Sbonwick char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */ 272fa9e4066Sahrens } vdev_label_t; /* 256K total */ 273fa9e4066Sahrens 274ecc2d604Sbonwick /* 275ecc2d604Sbonwick * vdev_dirty() flags 276ecc2d604Sbonwick */ 277ecc2d604Sbonwick #define VDD_METASLAB 0x01 278ecc2d604Sbonwick #define VDD_DTL 0x02 279ecc2d604Sbonwick 280f7170741SWill Andrews /* Offset of embedded boot loader region on each label */ 281f7170741SWill Andrews #define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t)) 282fa9e4066Sahrens /* 283f7170741SWill Andrews * Size of embedded boot loader region on each label. 284fa9e4066Sahrens * The total size of the first two labels plus the boot area is 4MB. 285fa9e4066Sahrens */ 286f7170741SWill Andrews #define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */ 287fa9e4066Sahrens 288fa9e4066Sahrens /* 289fa9e4066Sahrens * Size of label regions at the start and end of each leaf device. 290fa9e4066Sahrens */ 291fa9e4066Sahrens #define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE) 292fa9e4066Sahrens #define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t)) 293fa9e4066Sahrens #define VDEV_LABELS 4 294ad135b5dSChristopher Siden #define VDEV_BEST_LABEL VDEV_LABELS 295fa9e4066Sahrens 296fa9e4066Sahrens #define VDEV_ALLOC_LOAD 0 297fa9e4066Sahrens #define VDEV_ALLOC_ADD 1 29899653d4eSeschrock #define VDEV_ALLOC_SPARE 2 299fa94a07fSbrendan #define VDEV_ALLOC_L2CACHE 3 30021ecdf64SLin Ling #define VDEV_ALLOC_ROOTPOOL 4 3011195e687SMark J Musante #define VDEV_ALLOC_SPLIT 5 302cd0837ccSGeorge Wilson #define VDEV_ALLOC_ATTACH 6 303fa9e4066Sahrens 304fa9e4066Sahrens /* 305fa9e4066Sahrens * Allocate or free a vdev 306fa9e4066Sahrens */ 30788ecc943SGeorge Wilson extern vdev_t *vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, 30888ecc943SGeorge Wilson vdev_ops_t *ops); 30999653d4eSeschrock extern int vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *config, 31099653d4eSeschrock vdev_t *parent, uint_t id, int alloctype); 311fa9e4066Sahrens extern void vdev_free(vdev_t *vd); 312fa9e4066Sahrens 313fa9e4066Sahrens /* 314fa9e4066Sahrens * Add or remove children and parents 315fa9e4066Sahrens */ 316fa9e4066Sahrens extern void vdev_add_child(vdev_t *pvd, vdev_t *cvd); 317fa9e4066Sahrens extern void vdev_remove_child(vdev_t *pvd, vdev_t *cvd); 318fa9e4066Sahrens extern void vdev_compact_children(vdev_t *pvd); 319fa9e4066Sahrens extern vdev_t *vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops); 320fa9e4066Sahrens extern void vdev_remove_parent(vdev_t *cvd); 321fa9e4066Sahrens 322fa9e4066Sahrens /* 323fa9e4066Sahrens * vdev sync load and sync 324fa9e4066Sahrens */ 32588ecc943SGeorge Wilson extern void vdev_load_log_state(vdev_t *nvd, vdev_t *ovd); 3264b964adaSGeorge Wilson extern boolean_t vdev_log_state_valid(vdev_t *vd); 327560e6e96Seschrock extern void vdev_load(vdev_t *vd); 3280713e232SGeorge Wilson extern int vdev_dtl_load(vdev_t *vd); 329fa9e4066Sahrens extern void vdev_sync(vdev_t *vd, uint64_t txg); 330fa9e4066Sahrens extern void vdev_sync_done(vdev_t *vd, uint64_t txg); 331ecc2d604Sbonwick extern void vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg); 3320713e232SGeorge Wilson extern void vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg); 333fa9e4066Sahrens 334fa9e4066Sahrens /* 335fa9e4066Sahrens * Available vdev types. 336fa9e4066Sahrens */ 337fa9e4066Sahrens extern vdev_ops_t vdev_root_ops; 338fa9e4066Sahrens extern vdev_ops_t vdev_mirror_ops; 339fa9e4066Sahrens extern vdev_ops_t vdev_replacing_ops; 340fa9e4066Sahrens extern vdev_ops_t vdev_raidz_ops; 341fa9e4066Sahrens extern vdev_ops_t vdev_disk_ops; 342fa9e4066Sahrens extern vdev_ops_t vdev_file_ops; 343fa9e4066Sahrens extern vdev_ops_t vdev_missing_ops; 34488ecc943SGeorge Wilson extern vdev_ops_t vdev_hole_ops; 34599653d4eSeschrock extern vdev_ops_t vdev_spare_ops; 346fa9e4066Sahrens 347fa9e4066Sahrens /* 3482a79c5feSlling * Common size functions 349fa9e4066Sahrens */ 350fa9e4066Sahrens extern uint64_t vdev_default_asize(vdev_t *vd, uint64_t psize); 351573ca77eSGeorge Wilson extern uint64_t vdev_get_min_asize(vdev_t *vd); 352573ca77eSGeorge Wilson extern void vdev_set_min_asize(vdev_t *vd); 353fa9e4066Sahrens 354e81c57b1Sahrens /* 355f7170741SWill Andrews * Global variables 356e81c57b1Sahrens */ 357f7170741SWill Andrews /* zdb uses this tunable, so it must be declared here to make lint happy. */ 358e81c57b1Sahrens extern int zfs_vdev_cache_size; 359e81c57b1Sahrens 36031d7e8faSGeorge Wilson /* 36131d7e8faSGeorge Wilson * The vdev_buf_t is used to translate between zio_t and buf_t, and back again. 36231d7e8faSGeorge Wilson */ 36331d7e8faSGeorge Wilson typedef struct vdev_buf { 36431d7e8faSGeorge Wilson buf_t vb_buf; /* buffer that describes the io */ 36531d7e8faSGeorge Wilson zio_t *vb_io; /* pointer back to the original zio_t */ 36631d7e8faSGeorge Wilson } vdev_buf_t; 36731d7e8faSGeorge Wilson 368fa9e4066Sahrens #ifdef __cplusplus 369fa9e4066Sahrens } 370fa9e4066Sahrens #endif 371fa9e4066Sahrens 372fa9e4066Sahrens #endif /* _SYS_VDEV_IMPL_H */ 373