[00/10] unify origanization structure of block group cache

Message

Su Yue Dec. 5, 2019, 4:29 a.m. UTC

From: Su Yue <[e-mail]>

Avaiable on https://github.com/Damenly/btrfs-progs/tree/bg_cache_reform

In progs, block group caches are stored in btrfs_fs_info::block_group_cache
whose type is cache_extent. All block group caches adding/finding/freeing
are done in the misleading set/clear_extent_bits ways. However, kernel
side uses red-black tree structure in btrfs_fs_info directly. The
latter's structure is more reasonable and intuitive.

This patchset transforms structure of block group caches from cache_extent
to red-black tree and list.

patch[1] handles error to avoid warning after reform.
patch[2-6] are about rb tree reform things in preparation.
patch[7-8] are about dirty block groups linked in transaction in preparation.
patch[9] does replace works in action.
patch[10] does cleanup.

This patchset passed progs tests and did not cause any regression.

Su Yue (10):
  btrfs-progs: handle error if btrfs_write_one_block_group() failed
  btrfs-progs: block_group: add rb tree related memebers
  btrfs-progs: port block group cache tree insertion and lookup
    functions
  btrfs-progs: reform the function block_group_cache_tree_search()
  btrfs-progs: adjust function btrfs_lookup_first_block_group_kernel
  btrfs-progs: abstract function btrfs_add_block_group_cache()
  block-progs: block_group: add dirty_bgs list related memebers
  btrfs-progs: pass @trans to functions touch dirty block groups
  btrfs-progs: reform block groups caches structure
  btrfs-progs: cleanups after block group cache reform

 check/main.c                |   6 +-
 check/mode-lowmem.c         |   6 +-
 cmds/rescue-chunk-recover.c |  10 +-
 ctree.h                     |  29 ++--
 disk-io.c                   |   4 +-
 extent-tree.c               | 306 +++++++++++++++---------------------
 extent_io.h                 |   2 -
 image/main.c                |  10 +-
 transaction.c               |   8 +-
 transaction.h               |   3 +-
 10 files changed, 169 insertions(+), 215 deletions(-)