[Devel] [PATCH RH9 0/7] allow to seek holes is block devices

[Andrey Zhadchenko]

We need to be able to know if and where the image is sparse during
backups.
Implement blockdev and dm infrastructure, add an ability to find
holes for dm-qcow2, dm-ploop, dm-push-backup
After this patches llseek with SEEK_HOLES and SEEK_DATA can be used
with block devices

Andrey Zhadchenko (7):
  block/fops: add find_hole to blockdevops
  dm: add find_hole infrastructure
  dm/push_backup: add seek proxy
  dm/dm-qcow2: add find_hole
  dm/dm-ploop: reinforce some defines
  dm/dm-ploop: allow to check if cluster is locked
  dm/dm-ploop: add find_hole

 block/fops.c                  |  11 +++
 drivers/md/dm-ploop-map.c     |  52 ++++++++++++-
 drivers/md/dm-ploop-target.c  |   1 +
 drivers/md/dm-ploop.h         |   9 ++-
 drivers/md/dm-push-backup.c   |  12 +++
 drivers/md/dm-qcow2-map.c     | 140 ++++++++++++++++++++++++++++++++++
 drivers/md/dm-qcow2-target.c  |   1 +
 drivers/md/dm-qcow2.h         |   2 +
 drivers/md/dm.c               |  39 ++++++++++
 include/linux/blkdev.h        |   1 +
 include/linux/device-mapper.h |   4 +
 11 files changed, 267 insertions(+), 5 deletions(-)

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2.39.3