[libvirt] [RFC: PATCHv4 00/15] outgoing migration via fd: rather than exec:

v3 has not had complete reviews yet, located at: https://www.redhat.com/archives/libvir-list/2011-March/msg00132.html I'm posting v4 rebased on the latest tree, to get more feedback and possibly ACKs for the earlier half of the series. Differences in v4 (still incomplete): rearrange some of the earlier patches, incorporate Paolo's feedback Currently well-tested through patch 11. Remaining patches (12-15) are compiling but not yet tested, but should form the basis for doing compressed migration. Also available via: git fetch git://repo.or.cz/libvirt/ericb.git fd-migration Still to go - I really hate that doCoreDump can't use fd-migration until I make it compute qemuCaps; really, we should be computing caps once at vm startup, and remembering it elsewhere doCoreDump only works to regular files and fails on root-squash NFS, it should be possible to fix that I really need to write virCommandKill, which silently kills an async child process (if one is running) without overwriting any error messages Needs more testing - especially on root-squash NFS Eric Blake (15): qemu: use lighter-weight fd:n on incoming tunneled migration qemu: consolidate duplicated monitor migration code qemu: improve efficiency of dd during snapshots qemu: support migration to fd util: use SCM_RIGHTS in virFileOperation when needed qemu: allow simple domain save to use fd: protocol qemu: simplify domain save fd handling storage: simplify fd handling util: rename virFileOperation to virFileOpenAs util: adjust indentation in previous patch qemu, storage: improve type safety qemu: use common API for reading difficult files qemu: consolidate migration to file code qemu: skip granting access during fd migration qemu: support fd: migration with compression src/libvirt_private.syms | 2 +- src/qemu/qemu_driver.c | 626 ++++++++++++++++------------------------- src/qemu/qemu_migration.c | 45 +-- src/qemu/qemu_monitor.c | 124 ++++++++- src/qemu/qemu_monitor.h | 4 + src/qemu/qemu_monitor_json.c | 125 +-------- src/qemu/qemu_monitor_json.h | 23 +-- src/qemu/qemu_monitor_text.c | 123 +-------- src/qemu/qemu_monitor_text.h | 23 +-- src/storage/storage_backend.c | 80 +++--- src/util/util.c | 161 ++++++++---- src/util/util.h | 15 +- 12 files changed, 544 insertions(+), 807 deletions(-) -- 1.7.4