[RFC PATCH 0/3] Implementing dm-snapshots

[Samuel Mendoza-Jonas]

These patches allow Petitboot to make device mapper snapshots for any block
device thus preventing any inadvertent writes from reaching the actual disk,
such as performing journal replay on a disk mounted read-only.

I'm sending this out as an RFC so those interested can see how I've chosen to
go about adding the support. As it stands this would work for 90% of use cases,
however I still need to sort out the logic for merging writes back to the
original disk if we *do* intend to make writes, eg. if a GRUB config asks us to
update the saved_entry variable.

Samuel Mendoza-Jonas (3):
  talloc_set_destructor workaround
  discover: Add support for device-mapper snapshots
  discover: Create dm-snapshots for all eligible devices

 discover/Makefile.am      |   4 +
 discover/device-handler.c | 220 +++++++++++++++++++++++++++++++++++++++++++---
 discover/device-handler.h |   6 ++
 discover/udev.c           |  20 ++++-
 4 files changed, 237 insertions(+), 13 deletions(-)

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2.1.0