[PATCH v5 00/14] gfs2 iomap write support

[Andreas Gruenbacher <agruenba@redhat.com>]

Here's an update of my gfs2 iomap write patch queue, with support for
buffered writes as well as direct I/O reads and writes through iomap.
This update fixes a few bugs in the gfs2 specific parts.  The patches
are still meant for the upcoming merge window.

The first five patches are minor gfs2 specific cleanups and
improvements.

The actual fun starts with patch "iomap: Add write_{begin,end} iomap
operations" which adds callbacks into the filesystem for any per-page
processing.  Christoph has suggested that at least the stuffed inode
(aka. inline data) handline should be moved to the iomap_{begin,end}
operations.  As the last patch tries to demonstrate, this is a bit
tricky, so even though Christoph's approach is slightly cleaner
conceptually, it doesn't look like an improvement overall.

Patches "iomap: Mark newly allocated buffer heads as new" and "iomap:
Complete partial direct I/O writes synchronously" have been added as
discussed.

A 4.17-rc7 based version of the patches can be found here:

  https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git/log/?h=iomap-write

Thanks,
Andreas

Andreas Gruenbacher (13):
  gfs2: Update find_metapath comment
  gfs2: hole_size improvement
  gfs2: gfs2_stuffed_write_end cleanup
  gfs2: Remove ordered write mode handling from gfs2_trans_add_data
  gfs2: Iomap cleanups and improvements
  iomap: Add write_{begin,end} iomap operations
  iomap: Mark newly allocated buffer heads as new
  gfs2: iomap buffered write support
  gfs2: gfs2_extent_length cleanup
  iomap: Complete partial direct I/O writes synchronously
  gfs2: iomap direct I/O support
  gfs2: Remove gfs2_write_{begin,end}
  gfs2: Handle stuffed files in iomap_{begin,end}

Christoph Hellwig (1):
  iomap: inline data should be an iomap type, not a flag

 fs/buffer.c           |   8 +-
 fs/ext2/inode.c       |   2 +
 fs/ext4/inline.c      |   4 +-
 fs/ext4/inode.c       |   2 +
 fs/gfs2/aops.c        | 344 +------------------
 fs/gfs2/aops.h        |  22 ++
 fs/gfs2/bmap.c        | 772 ++++++++++++++++++++++++++++++++----------
 fs/gfs2/bmap.h        |   6 +-
 fs/gfs2/file.c        | 174 +++++++++-
 fs/gfs2/inode.c       |   4 -
 fs/gfs2/log.h         |   7 +-
 fs/gfs2/quota.c       |   5 +-
 fs/gfs2/trans.c       |  27 +-
 fs/iomap.c            | 109 +++---
 fs/xfs/xfs_iomap.c    |   2 +
 include/linux/iomap.h |  25 +-
 16 files changed, 920 insertions(+), 593 deletions(-)
 create mode 100644 fs/gfs2/aops.h

-- 
2.17.0