When a 'cont' is issued on a VM that's just waiting for an incoming migration, the VM reboots and boots into the guest, possibly corrupting its storage since it could be shared with another VM running elsewhere.
Ensure that a VM started with '-incoming' is only run when an incoming migration successfully completes. Reported-by: Laine Stump <la...@redhat.com> Signed-off-by: Amit Shah <amit.s...@redhat.com> --- migration.c | 3 +++ monitor.c | 4 ++++ sysemu.h | 1 + vl.c | 3 +++ 4 files changed, 11 insertions(+), 0 deletions(-) diff --git a/migration.c b/migration.c index 650eb78..84d7e4a 100644 --- a/migration.c +++ b/migration.c @@ -67,6 +67,9 @@ void process_incoming_migration(QEMUFile *f) qemu_announce_self(); DPRINTF("successfully loaded vm state\n"); + incoming_expected = false; + incoming_done = true; + if (autostart) vm_start(); } diff --git a/monitor.c b/monitor.c index 45fd482..d12a7b5 100644 --- a/monitor.c +++ b/monitor.c @@ -1056,6 +1056,10 @@ static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data) { struct bdrv_iterate_context context = { mon, 0 }; + if (incoming_expected && !incoming_done) { + autostart = 1; + return 1; /* Waiting for incoming migration */ + } bdrv_iterate(encrypted_bdrv_it, &context); /* only resume the vm if all keys are set and valid */ if (!context.err) { diff --git a/sysemu.h b/sysemu.h index 9c988bb..f9c1962 100644 --- a/sysemu.h +++ b/sysemu.h @@ -99,6 +99,7 @@ typedef enum DisplayType } DisplayType; extern int autostart; +extern int incoming_expected, incoming_done; extern int bios_size; typedef enum { diff --git a/vl.c b/vl.c index ba6ee11..b69c11b 100644 --- a/vl.c +++ b/vl.c @@ -182,6 +182,8 @@ int nb_nics; NICInfo nd_table[MAX_NICS]; int vm_running; int autostart; +int incoming_expected; /* Started with -incoming and waiting for incoming */ +int incoming_done; /* Incoming migration successful */ static int rtc_utc = 1; static int rtc_date_offset = -1; /* -1 means no change */ QEMUClock *rtc_clock; @@ -2557,6 +2559,7 @@ int main(int argc, char **argv, char **envp) break; case QEMU_OPTION_incoming: incoming = optarg; + incoming_expected = true; break; case QEMU_OPTION_nodefaults: default_serial = 0; -- 1.7.1.1