From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
This patch-pair adds the QEMUSizedBuffer based in-memory QEMUFile
written by Stefan Berger and Joel Schopp. I've made some
fixes and modified the existing test-vmstate to use it for some test cases.
While there's nothing other than test cases using it yet, I think
it's worth going in by itself, since I'm using it in two separate
patchsets (postcopy and visitor/BER) and Sanidhya uses it in
the periodic vmstate test world. In addition both microcheckpointing and
COLO have similar but independent implementations (although they both
have some extra-gotcha's so it might not be possible to reuse it), and
there was another implementation of the same thing in the Yabusame Postcopy
world. Thus it seems best to put in, if only to stop people writing yet
another implementation.
Dave
v5:
Fixes from Eric's comments; including a memory leak in an error path
v4:
Fix very silly mistake in qsb_grow ENOMEM check
v3:
Mostly addressing comments from Eric and Gonglei
rewrote qsb_grow to always use _try_ for memory allocation
also made it use MAX_CHUNK_SIZE as needed
made QSB_MAX_CHUNK_SIZE 16x rather than 10x CHUNK_SIZE
reworked qsb_get_buffer to always take an allocated buffer
qsb_create:
Cope with 0 length but passed buffer
Rework so it can fail on memory allocation failures
qsb_write_at
return -EINVAL for invalid position
qsb_clone
Cope with qsb_write_at failing
Typo: 'of of' in comment
'withing'
Reword qsb_clone 'exact copy'->'deep copy'
Dr. David Alan Gilbert (2):
QEMUSizedBuffer based QEMUFile
Tests: QEMUSizedBuffer/QEMUBuffer
include/migration/qemu-file.h | 28 +++
include/qemu/typedefs.h | 1 +
qemu-file.c | 456 ++++++++++++++++++++++++++++++++++++++++++
tests/Makefile | 2 +-
tests/test-vmstate.c | 74 +++----
5 files changed, 524 insertions(+), 37 deletions(-)
--
1.9.3
