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live migration: Allow cleanup after cancellation or error

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Introduce qemu_savevm_state_cancel and inject a stage -1 to cancel a
live migration. This gives the involved subsystems a chance to clean up
dynamically allocated resources. Namely, the block migration layer can
now free its device descriptors and pending blocks.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-11-30 18:21:21 +01:00 • committed by Anthony Liguori
parent 9a743e5ba3
commit 4ec7fcc7da
5 changed files with 54 additions and 8 deletions
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5
vl.c
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@ -2934,6 +2934,11 @@ static int ram_save_live(QEMUFile *f, int stage, void *opaque)
double bwidth = 0;
uint64_t expected_time = 0;
if (stage < 0) {
cpu_physical_memory_set_dirty_tracking(0);
return 0;
}
if (cpu_physical_sync_dirty_bitmap(0, TARGET_PHYS_ADDR_MAX) != 0) {
qemu_file_set_error(f);
return 0;