[PATCH v3 0/3] btrfs: btrfs_bio and btrfs_io_bio rename

[Qu Wenruo <wqu@suse.com>]

The branch can be fetched from github, and is the preferred way to grab
the code, as this patchset changed quite a lot of code.
https://github.com/adam900710/linux/tree/chunk_refactor

There are two structure, btrfs_io_bio and btrfs_bio, which have very
similar names but completely different meanings.

Btrfs_io_bio mostly works at logical bytenr layer (its
bio->bi_iter.bi_sector points to btrfs logical bytenr), and just
contains extra info like csum and mirror_num.

And btrfs_io_bio is in fact the most utilized bio, as all data/metadata
IO is using btrfs_io_bio.

While btrfs_bio is completely a helper structure for mirrored IO
submission (utilized by SINGLE/DUP/RAID1/RAID10), and contains RAID56
maps for RAID56 (it doesn't utilize this structure for IO submission
tracking).

Such naming is completely anti-human.

So this patchset will do the following renaming:

- btrfs_bio -> btrfs_io_context
  Since it's not really used by all bios (only mirrored profiles utilize
  it), and it contains extra info for RAID56, it's not proper to name it
  with _bio suffix.

  Later we can integrate btrfs_io_context pointer into the new
  btrfs_bio.

- btrfs_io_bio -> btrfs_logical_bio
  It is intentional not to reuse "btrfs_bio", which could cause
  confusion for later backport.

Changelog:
v2:
- Rename btrfs_bio to btrfs_io_context (bioc)
- Rename btrfs_io_bio to btrfs_bio
  Both suggested by Nikolay

v3:
- Fixes whiespace problems
  Caused by "dwi" vim commands

- Update several modified comments

- Rename btrfs_io_bio to btrfs_logical_bio
  To avoid backport confusion.


Qu Wenruo (3):
  btrfs: rename btrfs_bio to btrfs_io_context
  btrfs: remove btrfs_bio_alloc() helper
  btrfs: rename struct btrfs_io_bio to btrfs_logical_bio

 fs/btrfs/check-integrity.c |   4 +-
 fs/btrfs/compression.c     |  20 +--
 fs/btrfs/ctree.h           |   6 +-
 fs/btrfs/disk-io.c         |   2 +-
 fs/btrfs/disk-io.h         |   2 +-
 fs/btrfs/extent-tree.c     |  19 ++-
 fs/btrfs/extent_io.c       | 116 ++++++++--------
 fs/btrfs/extent_io.h       |   8 +-
 fs/btrfs/extent_map.c      |   4 +-
 fs/btrfs/file-item.c       |  12 +-
 fs/btrfs/inode.c           |  50 +++----
 fs/btrfs/raid56.c          | 135 +++++++++---------
 fs/btrfs/raid56.h          |   8 +-
 fs/btrfs/reada.c           |  26 ++--
 fs/btrfs/scrub.c           | 130 +++++++++---------
 fs/btrfs/volumes.c         | 272 ++++++++++++++++++-------------------
 fs/btrfs/volumes.h         |  63 +++++----
 fs/btrfs/zoned.c           |  16 +--
 18 files changed, 455 insertions(+), 438 deletions(-)

-- 
2.33.0