Introduce a new QMP command 'blockdev-change-medium' which is intended
to replace the 'change' command for block devices. The existing function
qmp_change_blockdev() is accordingly renamed to
qmp_blockdev_change_medium().
Signed-off-by: Max Reitz <mre...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
---
blockdev.c | 7 ++++---
include/sysemu/blockdev.h | 2 --
qapi-schema.json | 6 ++++--
qapi/block-core.json | 23 +++++++++++++++++++++++
qmp-commands.hx | 31 +++++++++++++++++++++++++++++++
qmp.c | 2 +-
6 files changed, 63 insertions(+), 8 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index 687b39f..a0de2d8 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2066,8 +2066,9 @@ void qmp_blockdev_insert_medium(const char *device, const
char *node_name,
qmp_blockdev_insert_anon_medium(device, bs, errp);
}
-void qmp_change_blockdev(const char *device, const char *filename,
- const char *format, Error **errp)
+void qmp_blockdev_change_medium(const char *device, const char *filename,
+ bool has_format, const char *format,
+ Error **errp)
{
BlockBackend *blk;
BlockBackendRootState *blk_rs;
@@ -2090,7 +2091,7 @@ void qmp_change_blockdev(const char *device, const char
*filename,
bdrv_flags = blk_rs->read_only ? 0 : BDRV_O_RDWR;
bdrv_flags |= blk_rs->open_flags & ~BDRV_O_RDWR;
- if (format) {
+ if (has_format) {
drv = bdrv_find_whitelisted_format(format, bdrv_flags & BDRV_O_RDWR);
if (!drv) {
error_setg(errp, "Invalid block format '%s'", format);
diff --git a/include/sysemu/blockdev.h b/include/sysemu/blockdev.h
index 7ca59b5..aa2865c 100644
--- a/include/sysemu/blockdev.h
+++ b/include/sysemu/blockdev.h
@@ -63,8 +63,6 @@ DriveInfo *drive_new(QemuOpts *arg, BlockInterfaceType
block_default_type);
/* device-hotplug */
-void qmp_change_blockdev(const char *device, const char *filename,
- const char *format, Error **errp);
void hmp_commit(Monitor *mon, const QDict *qdict);
int hmp_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
#endif
diff --git a/qapi-schema.json b/qapi-schema.json
index 0662a9b..7350d93 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1787,8 +1787,10 @@
# device's password. The behavior of reads and writes to the block
# device between when these calls are executed is undefined.
#
-# Notes: It is strongly recommended that this interface is not used especially
-# for changing block devices.
+# Notes: This interface is deprecated, and it is strongly recommended that you
+# avoid using it. For changing block devices, use
+# blockdev-change-medium; for changing VNC parameters, use
+# change-vnc-password.
#
# Since: 0.14.0
##
diff --git a/qapi/block-core.json b/qapi/block-core.json
index cac67d9..7c4a44a 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1909,6 +1909,29 @@
##
+# @blockdev-change-medium:
+#
+# Changes the medium inserted into a block device by ejecting the current
medium
+# and loading a new image file which is inserted as the new medium (this
command
+# combines blockdev-open-tray, blockdev-remove-medium, blockdev-insert-medium
+# and blockdev-close-tray).
+#
+# @device: block device name
+#
+# @filename: filename of the new image to be loaded
+#
+# @format: #optional, format to open the new image with (defaults to
+# the probed format)
+#
+# Since: 2.3
+##
+{ 'command': 'blockdev-change-medium',
+ 'data': { 'device': 'str',
+ 'filename': 'str',
+ '*format': 'str' } }
+
+
+##
# @BlockErrorAction
#
# An enumeration of action that has been taken when a DISK I/O occurs
diff --git a/qmp-commands.hx b/qmp-commands.hx
index b910d46..46530c9 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4085,6 +4085,37 @@ Example:
EQMP
{
+ .name = "blockdev-change-medium",
+ .args_type = "device:B,filename:F,format:s?",
+ .mhandler.cmd_new = qmp_marshal_input_blockdev_change_medium,
+ },
+
+SQMP
+blockdev-change-medium
+----------------------
+
+Changes the medium inserted into a block device by ejecting the current medium
+and loading a new image file which is inserted as the new medium.
+
+Arguments:
+
+- "device": device name (json-string)
+- "filename": filename of the new image (json-string)
+- "format": format of the new image (json-string, optional)
+
+Examples:
+
+1. Change a removable medium
+
+-> { "execute": "blockdev-change-medium",
+ "arguments": { "device": "ide1-cd0",
+ "filename": "/srv/images/Fedora-12-x86_64-DVD.iso",
+ "format": "raw" } }
+<- { "return": {} }
+
+EQMP
+
+ {
.name = "query-memdev",
.args_type = "",
.mhandler.cmd_new = qmp_marshal_input_query_memdev,
diff --git a/qmp.c b/qmp.c
index 99c14bf..bd28bed 100644
--- a/qmp.c
+++ b/qmp.c
@@ -428,7 +428,7 @@ void qmp_change(const char *device, const char *target,
if (strcmp(device, "vnc") == 0) {
qmp_change_vnc(target, has_arg, arg, errp);
} else {
- qmp_change_blockdev(device, target, arg, errp);
+ qmp_blockdev_change_medium(device, target, has_arg, arg, errp);
}
}
--
2.4.1
