[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH] migration: Issue 'cont' only on successful incoming
From: |
Amit Shah |
Subject: |
[Qemu-devel] [PATCH] migration: Issue 'cont' only on successful incoming migration |
Date: |
Fri, 23 Jul 2010 16:15:15 +0530 |
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 <address@hidden>
Signed-off-by: Amit Shah <address@hidden>
---
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
- [Qemu-devel] [PATCH] migration: Issue 'cont' only on successful incoming migration,
Amit Shah <=