10592 misc. metaslab and vdev related ZoL bug fixes
Portions contributed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Giuseppe Di Natale <guss80@gmail.com>
Reviewed by: George Melikov <mail@gmelikov.ru>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Tony Hutter <hutter2@llnl.gov>
Reviewed by: Kody Kantor <kody.kantor@joyent.com>
Approved by: Dan McDonald <danmcd@joyent.com>

*** 79,91 ****
  void range_tree_init(void);
  void range_tree_fini(void);
  range_tree_t *range_tree_create(range_tree_ops_t *ops, void *arg);
  void range_tree_destroy(range_tree_t *rt);
  boolean_t range_tree_contains(range_tree_t *rt, uint64_t start, uint64_t size);
  uint64_t range_tree_space(range_tree_t *rt);
  boolean_t range_tree_is_empty(range_tree_t *rt);
- void range_tree_verify(range_tree_t *rt, uint64_t start, uint64_t size);
  void range_tree_swap(range_tree_t **rtsrc, range_tree_t **rtdst);
  void range_tree_stat_verify(range_tree_t *rt);
  uint64_t range_tree_min(range_tree_t *rt);
  uint64_t range_tree_max(range_tree_t *rt);
  uint64_t range_tree_span(range_tree_t *rt);
--- 79,92 ----
  void range_tree_init(void);
  void range_tree_fini(void);
  range_tree_t *range_tree_create(range_tree_ops_t *ops, void *arg);
  void range_tree_destroy(range_tree_t *rt);
  boolean_t range_tree_contains(range_tree_t *rt, uint64_t start, uint64_t size);
+ void range_tree_verify_not_present(range_tree_t *rt,
+     uint64_t start, uint64_t size);
  uint64_t range_tree_space(range_tree_t *rt);
  boolean_t range_tree_is_empty(range_tree_t *rt);
  void range_tree_swap(range_tree_t **rtsrc, range_tree_t **rtdst);
  void range_tree_stat_verify(range_tree_t *rt);
  uint64_t range_tree_min(range_tree_t *rt);
  uint64_t range_tree_max(range_tree_t *rt);
  uint64_t range_tree_span(range_tree_t *rt);