4101 metaslab_debug should allow for fine-grained control
4102 space_maps should store more information about themselves
4103 space map object blocksize should be increased
4104 ::spa_space no longer works
4105 removing a mirrored log device results in a leaked object
4106 asynchronously load metaslab
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Sebastien Roy <seb@delphix.com>

*** 18,28 ****
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2012 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_METASLAB_H
  #define _SYS_METASLAB_H
  
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2013 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_METASLAB_H
  #define _SYS_METASLAB_H
  
*** 34,83 ****
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
! extern space_map_ops_t *zfs_metaslab_ops;
  
! extern metaslab_t *metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo,
!     uint64_t start, uint64_t size, uint64_t txg);
! extern void metaslab_fini(metaslab_t *msp);
! extern void metaslab_sync(metaslab_t *msp, uint64_t txg);
! extern void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
! extern void metaslab_sync_reassess(metaslab_group_t *mg);
  
  #define METASLAB_HINTBP_FAVOR   0x0
  #define METASLAB_HINTBP_AVOID   0x1
  #define METASLAB_GANG_HEADER    0x2
  #define METASLAB_GANG_CHILD     0x4
  #define METASLAB_GANG_AVOID     0x8
  
! extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
      blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
! extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg,
!     boolean_t now);
! extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
! extern void metaslab_check_free(spa_t *spa, const blkptr_t *bp);
  
! extern metaslab_class_t *metaslab_class_create(spa_t *spa,
!     space_map_ops_t *ops);
! extern void metaslab_class_destroy(metaslab_class_t *mc);
! extern int metaslab_class_validate(metaslab_class_t *mc);
  
! extern void metaslab_class_space_update(metaslab_class_t *mc,
      int64_t alloc_delta, int64_t defer_delta,
      int64_t space_delta, int64_t dspace_delta);
! extern uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
! extern uint64_t metaslab_class_get_space(metaslab_class_t *mc);
! extern uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
! extern uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
  
! extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc,
!     vdev_t *vd);
! extern void metaslab_group_destroy(metaslab_group_t *mg);
! extern void metaslab_group_activate(metaslab_group_t *mg);
! extern void metaslab_group_passivate(metaslab_group_t *mg);
  
  #ifdef  __cplusplus
  }
  #endif
  
--- 34,91 ----
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
! typedef struct metaslab_ops {
!         uint64_t (*msop_alloc)(metaslab_t *msp, uint64_t size);
!         boolean_t (*msop_fragmented)(metaslab_t *msp);
! } metaslab_ops_t;
  
! extern metaslab_ops_t *zfs_metaslab_ops;
  
+ metaslab_t *metaslab_init(metaslab_group_t *mg, uint64_t id,
+     uint64_t object, uint64_t txg);
+ void metaslab_fini(metaslab_t *msp);
+ 
+ void metaslab_load_wait(metaslab_t *msp);
+ int metaslab_load(metaslab_t *msp);
+ void metaslab_unload(metaslab_t *msp);
+ 
+ void metaslab_sync(metaslab_t *msp, uint64_t txg);
+ void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
+ void metaslab_sync_reassess(metaslab_group_t *mg);
+ uint64_t metaslab_block_maxsize(metaslab_t *msp);
+ 
  #define METASLAB_HINTBP_FAVOR   0x0
  #define METASLAB_HINTBP_AVOID   0x1
  #define METASLAB_GANG_HEADER    0x2
  #define METASLAB_GANG_CHILD     0x4
  #define METASLAB_GANG_AVOID     0x8
  
! int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
      blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
! void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now);
! int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
! void metaslab_check_free(spa_t *spa, const blkptr_t *bp);
  
! metaslab_class_t *metaslab_class_create(spa_t *spa, metaslab_ops_t *ops);
! void metaslab_class_destroy(metaslab_class_t *mc);
! int metaslab_class_validate(metaslab_class_t *mc);
  
! void metaslab_class_space_update(metaslab_class_t *mc,
      int64_t alloc_delta, int64_t defer_delta,
      int64_t space_delta, int64_t dspace_delta);
! uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
! uint64_t metaslab_class_get_space(metaslab_class_t *mc);
! uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
! uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
  
! metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, vdev_t *vd);
! void metaslab_group_destroy(metaslab_group_t *mg);
! void metaslab_group_activate(metaslab_group_t *mg);
! void metaslab_group_passivate(metaslab_group_t *mg);
  
  #ifdef  __cplusplus
  }
  #endif