block: Validate node-name
The device_name of a BlockDriverState is currently checked because it is
always used as a QemuOpts ID and qemu_opts_create() checks whether such
IDs are wellformed.
node-name is supposed to share the same namespace, but it isn't checked
currently. This patch adds explicit checks both for device_name and
node-name so that the same rules will still apply even if QemuOpts won't
be used any more at some point.
qemu-img used to use names with spaces in them, which isn't allowed any
more. Replace them with underscores.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block.c b/block.c
index a2fa1e1..c5a251c 100644
--- a/block.c
+++ b/block.c
@@ -335,12 +335,22 @@
QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list);
}
+static bool bdrv_is_valid_name(const char *name)
+{
+ return qemu_opts_id_wellformed(name);
+}
+
/* create a new block device (by default it is empty) */
BlockDriverState *bdrv_new(const char *device_name, Error **errp)
{
BlockDriverState *bs;
int i;
+ if (*device_name && !bdrv_is_valid_name(device_name)) {
+ error_setg(errp, "Invalid device name");
+ return NULL;
+ }
+
if (bdrv_find(device_name)) {
error_setg(errp, "Device with id '%s' already exists",
device_name);
@@ -863,9 +873,9 @@
return;
}
- /* empty string node name is invalid */
- if (node_name[0] == '\0') {
- error_setg(errp, "Empty node name");
+ /* Check for empty string or invalid characters */
+ if (!bdrv_is_valid_name(node_name)) {
+ error_setg(errp, "Invalid node name");
return;
}
