kernel/fs/zfs/sys/vdev_removal.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * This file and its contents are supplied under the terms of the
   5  * Common Development and Distribution License ("CDDL"), version 1.0.
   6  * You may only use this file in accordance with the terms of version
   7  * 1.0 of the CDDL.
   8  *
   9  * A full copy of the text of the CDDL should have accompanied this
  10  * source.  A copy of the CDDL is also available via the Internet at
  11  * http://www.illumos.org/license/CDDL.
  12  *
  13  * CDDL HEADER END
  14  */
  15
  16 /*
  17  * Copyright (c) 2014, 2017 by Delphix. All rights reserved.
  18  */
  19
  20 #ifndef _SYS_VDEV_REMOVAL_H
  21 #define _SYS_VDEV_REMOVAL_H
  22
  23 #include <sys/spa.h>
  24 #include <sys/bpobj.h>
  25 #include <sys/vdev_indirect_mapping.h>
  26 #include <sys/vdev_indirect_births.h>
  27
  28 #ifdef  __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 typedef struct spa_vdev_removal {
  33         uint64_t        svr_vdev_id;
  34         uint64_t        svr_max_offset_to_sync[TXG_SIZE];
  35         /* Thread performing a vdev removal. */
  36         kthread_t       *svr_thread;
  37         /* Segments left to copy from the current metaslab. */
  38         range_tree_t    *svr_allocd_segs;
  39         kmutex_t        svr_lock;
  40         kcondvar_t      svr_cv;
  41         boolean_t       svr_thread_exit;
  42
  43         /*
  44          * New mappings to write out each txg.
  45          */
  46         list_t          svr_new_segments[TXG_SIZE];
  47
  48         /*
  49          * Ranges that were freed while a mapping was in flight.  This is
  50          * a subset of the ranges covered by vdev_im_new_segments.
  51          */
  52         range_tree_t    *svr_frees[TXG_SIZE];
  53
  54         /*
  55          * Number of bytes which we have finished our work for
  56          * in each txg.  This could be data copied (which will be part of
  57          * the mappings in vdev_im_new_segments), or data freed before
  58          * we got around to copying it.
  59          */
  60         uint64_t        svr_bytes_done[TXG_SIZE];
  61
  62         /* List of leaf zap objects to be unlinked */
  63         nvlist_t        *svr_zaplist;
  64 } spa_vdev_removal_t;
  65
  66 typedef struct spa_condensing_indirect {
  67         /*
  68          * New mappings to write out each txg.
  69          */
  70         list_t          sci_new_mapping_entries[TXG_SIZE];
  71
  72         vdev_indirect_mapping_t *sci_new_mapping;
  73 } spa_condensing_indirect_t;
  74
  75 extern int spa_remove_init(spa_t *);
  76 extern void spa_restart_removal(spa_t *);
  77 extern int spa_condense_init(spa_t *);
  78 extern void spa_condense_fini(spa_t *);
  79 extern void spa_start_indirect_condensing_thread(spa_t *);
  80 extern void spa_vdev_condense_suspend(spa_t *);
  81 extern int spa_vdev_remove(spa_t *, uint64_t, boolean_t);
  82 extern void free_from_removing_vdev(vdev_t *, uint64_t, uint64_t);
  83 extern int spa_removal_get_stats(spa_t *, pool_removal_stat_t *);
  84 extern void svr_sync(spa_t *spa, dmu_tx_t *tx);
  85 extern void spa_vdev_remove_suspend(spa_t *);
  86 extern int spa_vdev_remove_cancel(spa_t *);
  87 extern void spa_vdev_removal_destroy(spa_vdev_removal_t *svr);
  88
  89 extern int vdev_removal_max_span;
  90 extern int zfs_remove_max_segment;
  91
  92 #ifdef  __cplusplus
  93 }
  94 #endif
  95
  96 #endif  /* _SYS_VDEV_REMOVAL_H */