[PATCH 0/2] Btrfs: add interface for writing compressed extents directly

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

Hi,

This is an update of my RFC series [1]. Patch 1 is a VFS patch to export
some permission checks. Patch 2 is the actual change.

Changes from the RFC:

- Rebased on misc-next, which now has the cleanups from patches 1-3.
- Generalized the interface to "raw writes" so that we can support,
  e.g., encrypted writes in the future.

Note that I kept the compat ioctl implementation the same based on the
discussion in [2].

1: https://lore.kernel.org/linux-btrfs/cover.1565900769.git.osandov@fb.com/
2: https://lore.kernel.org/linux-btrfs/20190903171458.GA7452@vader/

Omar Sandoval (2):
  fs: export rw_verify_area()
  btrfs: add ioctl for directly writing compressed data

 fs/btrfs/compression.c     |   6 +-
 fs/btrfs/compression.h     |  14 +--
 fs/btrfs/ctree.h           |   6 ++
 fs/btrfs/file.c            |  13 ++-
 fs/btrfs/inode.c           | 192 ++++++++++++++++++++++++++++++++++++-
 fs/btrfs/ioctl.c           |  95 ++++++++++++++++++
 fs/internal.h              |   5 -
 fs/read_write.c            |   1 +
 include/linux/fs.h         |   1 +
 include/uapi/linux/btrfs.h |  69 +++++++++++++
 10 files changed, 382 insertions(+), 20 deletions(-)

-- 
2.23.0