[libvirt] [PATCH 0/7] bulk snapshot list/redefine (incremental backup saga)

While looking at my work on incremental backups, Nir raised a good point: if we want to recreate a set of known checkpoints on one machine that will be taking over a domain from another machine, my initial proposal required making multiple API calls to list the XML for each checkpoint on the source, and then more API calls to redefine each checkpoint on the destination; it also had the drawback that the list has to be presented in topological order (the API won't let you define a child checkpoint if the parent is not defined first). He asked if I could instead add bulk APIs, for getting the XML for all checkpoints at once, and then for redefining all checkpoints at once. Since my checkpoint code borrows heavily from concepts in the snapshot code, I chose to tackle the problem by starting with this series, which does the same thing for snapshots as what I plan to do for checkpoints. That is, since this patch series adds virDomainGetXMLDesc(, VIR_DOMAIN_XML_SNAPSHOTS) and virDomainSnapshotCreateXML(, VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE_LIST), the checkpoint series will add virDOmainGetXMLDesc(, VIR_DOMAIN_XML_CHECKPOINTS) and virDomainCheckpointCreateXML(, VIR_DOMAIN_CHECKPOINT_CREATE_REDEFINE_LIST) with very similar code. Note that I'm posting the series now to start review; the bulk query is fully implemented (patch 6), while the bulk redefine still needs more work (patch 7 defines the API, but the actual implementation is trickier, so I'll be posting additional patches later once I get them working). Patch 1 is a revision of work posted previously in a different series where all other patches of that series are now on mainline. Also available at: https://repo.or.cz/libvirt/ericb.git/shortlog/refs/tags/snapshot-bulk-v1 Eric Blake (7): domain: Document VIR_DOMAIN_XML_MIGRATABLE snapshot: Give virDomainSnapshotDefFormat its own flags snapshot: Refactor virDomainSnapshotDefFormat snapshot: Add virDomainSnapshotObjListFormat domain: Expand virDomainDefFormatInternal with snapshots domain: Add VIR_DOMAIN_XML_SNAPSHOTS flag snapshot: Add VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE_LIST flag include/libvirt/libvirt-domain-snapshot.h | 3 + include/libvirt/libvirt-domain.h | 1 + src/conf/domain_conf.h | 8 ++ src/conf/snapshot_conf.h | 18 ++- src/conf/domain_conf.c | 71 ++++++++-- src/conf/snapshot_conf.c | 162 ++++++++++++++++------ src/esx/esx_driver.c | 1 - src/libvirt-domain-snapshot.c | 21 ++- src/libvirt-domain.c | 14 ++ src/libvirt_private.syms | 2 + src/network/bridge_driver.c | 3 +- src/qemu/qemu_domain.c | 24 +++- src/qemu/qemu_driver.c | 7 +- src/test/test_driver.c | 10 +- src/vbox/vbox_common.c | 5 +- src/vz/vz_driver.c | 3 +- tests/domainsnapshotxml2xmltest.c | 16 ++- tools/virsh-domain.c | 7 + tools/virsh-snapshot.c | 13 ++ 19 files changed, 293 insertions(+), 96 deletions(-) -- 2.20.1