[Qemu-devel] [PATCH v3 0/2] virtagent - fsfreeze support

[Jes.Sorensen@redhat.com]

From: Jes Sorensen <Jes.Sorensen@redhat.com>

Hi

This is a first attempt to add fsfreeze support to virtagent. The idea
is for the guest agent to walk the list of locally mounted file
systems in the guest, and issuing an ioctl to freeze them. The host
can then do a live snapshot of the guest, obtaining stable file
systems. After the snapshot, the host then calls the thaw function in
virtagent, which goes through the list of previously frozen file
systems and unfreezes them.

The list walking ignores remote file systems such as NFS and CIFS as
well as all pseudo file systems.

The guest agent code is in the first patch, and host agent code is in
the second patch. For now there is only human monitor support, but it
should be pretty straight forward to add QMP support as well.

Comments and suggestions welcome!

v3 of the patch encapsulates the freeze states in a struct and fixes
some tab issues that I had missed. Both pointed out by Michael Roth.

v2 of the patch addresses the issues pointed out by Stefan and Michael.

Note I will be gone all of next week, so if I don't reply it's because
I am busy skiing :)

Cheers,
Jes

Jes Sorensen (2):
  Add virtagent file system freeze/thaw
  Add monitor commands for fsfreeze support

 hmp-commands.hx    |   48 +++++++++++
 virtagent-common.h |    9 ++
 virtagent-server.c |  195 +++++++++++++++++++++++++++++++++++++++++++
 virtagent.c        |  235 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 virtagent.h        |    9 ++
 5 files changed, 496 insertions(+), 0 deletions(-)

-- 
1.7.3.5