See patch 2 for an explanation of the motivation.

v3:
- Clarified QAPI schema documentation that auto-read-only can only
  degrade read-write to read-only, not the other way round [Eric]
- Don't refuse to set copy-on-read=on and auto-read-only=on at the same
  time; only complain when actually trying to degrade to read-only
- Let bdrv_apply_auto_read_only() return -EACCESS on all errors
- Fixed file-posix and gluster implementations [Eric, Niels]
- Added a patch to make auto-read-only=on the default for human user
  interfaces (-drive/-hda/...)

v2:
- Turn bdrv_set_read_only() into bdrv_apply_auto_read_only()
- Support the option in a lot more block drivers

Kevin Wolf (9):
  block: Update flags in bdrv_set_read_only()
  block: Add auto-read-only option
  block: Require auto-read-only for existing fallbacks
  nbd: Support auto-read-only option
  file-posix: Support auto-read-only option
  curl: Support auto-read-only option
  gluster: Support auto-read-only option
  iscsi: Support auto-read-only option
  block: Make auto-read-only=on default for -drive

 qapi/block-core.json  |  7 ++++++
 include/block/block.h |  5 +++-
 block.c               | 54 +++++++++++++++++++++++++++++++++++--------
 block/bochs.c         | 17 +++++---------
 block/cloop.c         | 16 ++++---------
 block/curl.c          |  8 +++----
 block/dmg.c           | 16 ++++---------
 block/file-posix.c    | 19 ++++++++++++---
 block/gluster.c       | 12 ++++++++--
 block/iscsi.c         |  8 ++++---
 block/nbd-client.c    | 10 ++++----
 block/rbd.c           | 14 ++++-------
 block/vvfat.c         | 11 +++------
 blockdev.c            |  1 +
 14 files changed, 120 insertions(+), 78 deletions(-)

-- 
2.19.1