On 21/09/2020 14:17, Dr. David Alan Gilbert wrote:
* Dov Murik (dovmu...@linux.vnet.ibm.com) wrote:
When running the xen-save-devices-state QMP command, if the filename
already exists it will be truncated before dumping the devices' state
into it.
Signed-off-by: Dov Murik <dovmu...@linux.vnet.ibm.com>
---
OK, that looks fine to me, so:
Reviewed-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
Note that I found the above issue while trying to debug
xen-load-devices-state which simply fails (prints "Configuration section
missing" to stderr) directly after xen-save-devices-state (in the same
VM). I wonder if I should file a bug report as-is or investigate some
more. Advice welcome.
I don't try the xen-* commands normally; I've cc'ing in Stefano and
Anthony.
Thanks Dave. Just to be clear, I'm running this without Xen at all; but
these commands seem to work OK for dumping/restoring guest's devices
state (without RAM) -- if I modify the code to circumvent the mentioned
problem.
Dov
Dave
-Dov
---
migration/savevm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/migration/savevm.c b/migration/savevm.c
index 304d98ff78..e1b26672cc 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2803,7 +2803,8 @@ void qmp_xen_save_devices_state(const char *filename,
bool has_live, bool live,
vm_stop(RUN_STATE_SAVE_VM);
global_state_store_running();
- ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT, 0660, errp);
+ ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT | O_TRUNC,
+ 0660, errp);
if (!ioc) {
goto the_end;
}
--
2.20.1
