monitor: Introduce 'block_passwd' command
When using encrypted disk images, QEMU will prompt the user
for passwords when started.
This makes sense for the user protocol, but doesn't for QMP.
The solution is to have Monitor command which allows the user
or a Client to set passwords in advance, so that we avoid
the prompt completely.
This is what block_passwd does, for example:
(QEMU) block_passwd ide0-hd0 foobar
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qemu-monitor.hx b/qemu-monitor.hx
index 62e395b..c2670ee 100644
--- a/qemu-monitor.hx
+++ b/qemu-monitor.hx
@@ -1047,6 +1047,20 @@
used by another monitor command.
ETEXI
+ {
+ .name = "block_passwd",
+ .args_type = "device:B,password:s",
+ .params = "block_passwd device password",
+ .help = "set the password of encrypted block devices",
+ .user_print = monitor_user_noop,
+ .mhandler.cmd_new = do_block_set_passwd,
+ },
+
+STEXI
+@item block_passwd @var{device} @var{password}
+Set the encrypted device @var{device} password to @var{password}
+ETEXI
+
STEXI
@end table
ETEXI