aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMax Reitz <mreitz@redhat.com>2015-10-26 21:39:11 +0100
committerKevin Wolf <kwolf@redhat.com>2015-11-11 16:22:47 +0100
commitd129988289a885e57aa8790097e2d814764571bd (patch)
treec58bb2baf3d9322b56f0ae006bae083fd5c7a7f5
parent2814f67271bce537f29c6a7832f89fd4f1cdaa1a (diff)
downloadqemu-arm-d129988289a885e57aa8790097e2d814764571bd.tar.gz
blockdev: Add blockdev-insert-medium
And a helper function for that, which directly takes a pointer to the BDS to be inserted instead of its node-name (which will be used for implementing 'change' using blockdev-insert-medium). Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
-rw-r--r--blockdev.c56
-rw-r--r--qapi/block-core.json17
-rw-r--r--qmp-commands.hx37
3 files changed, 110 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c
index 25635e3597..0f2a7e2988 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2198,6 +2198,62 @@ out:
aio_context_release(aio_context);
}
+static void qmp_blockdev_insert_anon_medium(const char *device,
+ BlockDriverState *bs, Error **errp)
+{
+ BlockBackend *blk;
+ bool has_device;
+
+ blk = blk_by_name(device);
+ if (!blk) {
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+ "Device '%s' not found", device);
+ return;
+ }
+
+ /* For BBs without a device, we can exchange the BDS tree at will */
+ has_device = blk_get_attached_dev(blk);
+
+ if (has_device && !blk_dev_has_removable_media(blk)) {
+ error_setg(errp, "Device '%s' is not removable", device);
+ return;
+ }
+
+ if (has_device && !blk_dev_is_tray_open(blk)) {
+ error_setg(errp, "Tray of device '%s' is not open", device);
+ return;
+ }
+
+ if (blk_bs(blk)) {
+ error_setg(errp, "There already is a medium in device '%s'", device);
+ return;
+ }
+
+ blk_insert_bs(blk, bs);
+
+ QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list);
+}
+
+void qmp_blockdev_insert_medium(const char *device, const char *node_name,
+ Error **errp)
+{
+ BlockDriverState *bs;
+
+ bs = bdrv_find_node(node_name);
+ if (!bs) {
+ error_setg(errp, "Node '%s' not found", node_name);
+ return;
+ }
+
+ if (bs->blk) {
+ error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
+ blk_name(bs->blk));
+ return;
+ }
+
+ qmp_blockdev_insert_anon_medium(device, bs, errp);
+}
+
/* throttling disk I/O limits */
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
int64_t bps_wr,
diff --git a/qapi/block-core.json b/qapi/block-core.json
index e19e82cbaf..5c4fc727dc 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1940,6 +1940,23 @@
{ 'command': 'blockdev-remove-medium',
'data': { 'device': 'str' } }
+##
+# @blockdev-insert-medium:
+#
+# Inserts a medium (a block driver state tree) into a block device. That block
+# device's tray must currently be open (unless there is no attached guest
+# device) and there must be no medium inserted already.
+#
+# @device: block device name
+#
+# @node-name: name of a node in the block driver state graph
+#
+# Since: 2.5
+##
+{ 'command': 'blockdev-insert-medium',
+ 'data': { 'device': 'str',
+ 'node-name': 'str'} }
+
##
# @BlockErrorAction
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 282596265a..203ce6ac34 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4083,6 +4083,43 @@ Example:
EQMP
{
+ .name = "blockdev-insert-medium",
+ .args_type = "device:s,node-name:s",
+ .mhandler.cmd_new = qmp_marshal_blockdev_insert_medium,
+ },
+
+SQMP
+blockdev-insert-medium
+----------------------
+
+Inserts a medium (a block driver state tree) into a block device. That block
+device's tray must currently be open (unless there is no attached guest device)
+and there must be no medium inserted already.
+
+Arguments:
+
+- "device": block device name (json-string)
+- "node-name": root node of the BDS tree to insert into the block device
+
+Example:
+
+-> { "execute": "blockdev-add",
+ "arguments": { "options": { "node-name": "node0",
+ "driver": "raw",
+ "file": { "driver": "file",
+ "filename": "fedora.iso" } } } }
+
+<- { "return": {} }
+
+-> { "execute": "blockdev-insert-medium",
+ "arguments": { "device": "ide1-cd0",
+ "node-name": "node0" } }
+
+<- { "return": {} }
+
+EQMP
+
+ {
.name = "query-named-block-nodes",
.args_type = "",
.mhandler.cmd_new = qmp_marshal_query_named_block_nodes,