[Qemu-devel] [PATCH V3 0/7] export internal snapshot by qemu-nbd

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

This series allow user to read internal snapshot's contents without qemu-img
convert.

V2:
  Address Stefan's comments:
  02: add 'fall through' comments in the case statement.
  03: add doc about the difference of internal snapshot and backing chain
snapshot, which is used in previous '--snapshot' parameter.
  Other:
  01,04: rebased on upstream with conflict resolved.

v3:
  Address Paolo's comments:
  02: add parameter "-l snapshot_id_or_name", rename options
snapshot-load to load-snapshot, use QemuOpts.
  03: rename snapshot-load to load-snapshot.
  04: related change to test both -l and -L case.
  05-07: add similar parameter for qemu-img convert.
  Other:
  01: foldered original snapshot logic into function
bdrv_snapshot_load_tmp_by_id_or_name(), since multiple
caller present in this version. Refined error message from
", reason: %s" to ": %s".
  02: Refined error message from ", reason: %s" to ": %s".
  03: Rename PARAM to SNAPSHOT_PARAM.

Wenchao Xia (7):
  1 snapshot: distinguish id and name in load_tmp
  2 qemu-nbd: support internal snapshot export
  3 qemu-nbd: add doc for internal snapshot export
  4 qemu-iotests: add 058 internal snapshot export with qemu-nbd case
  5 qemu-img: add -L for snapshot in convert
  6 qemu-img: add doc for param -L in convert
  7 qemu-iotests: add test for snapshot in qemu-img convert

 block/qcow2-snapshot.c     |   16 +++++-
 block/qcow2.h              |    5 ++-
 block/snapshot.c           |   76 +++++++++++++++++++++++++++-
 include/block/block_int.h  |    4 +-
 include/block/snapshot.h   |   13 ++++-
 qemu-img-cmds.hx           |    2 +-
 qemu-img.c                 |   32 +++++++++---
 qemu-img.texi              |    7 ++-
 qemu-nbd.c                 |   46 ++++++++++++++++-
 qemu-nbd.texi              |   11 ++++-
 tests/qemu-iotests/058     |  121 ++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/058.out |   44 ++++++++++++++++
 tests/qemu-iotests/check   |    1 +
 tests/qemu-iotests/group   |    1 +
 14 files changed, 359 insertions(+), 20 deletions(-)
 create mode 100755 tests/qemu-iotests/058
 create mode 100644 tests/qemu-iotests/058.out