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.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block.c | 16 +++++++++++++---
include/qemu/option.h | 1 +
util/qemu-option.c | 4 ++--
3 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/block.c b/block.c
index e144fd5..bddf1a0 100644
--- a/block.c
+++ b/block.c
@@ -335,12 +335,22 @@ void bdrv_register(BlockDriver *bdrv)
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);
@@ -903,9 +913,9 @@ static void bdrv_assign_node_name(BlockDriverState *bs,
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;
}
diff --git a/include/qemu/option.h b/include/qemu/option.h
index 59bea75..945347c 100644
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -103,6 +103,7 @@ typedef int (*qemu_opt_loopfunc)(const char *name, const
char *value, void *opaq
int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
int abort_on_failure);
+int qemu_opts_id_wellformed(const char *id);
QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id);
QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
int fail_if_exists, Error **errp);
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 6dc27ce..0cf9960 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -641,7 +641,7 @@ QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
return NULL;
}
-static int id_wellformed(const char *id)
+int qemu_opts_id_wellformed(const char *id)
{
int i;
@@ -662,7 +662,7 @@ QemuOpts *qemu_opts_create(QemuOptsList *list, const char
*id,
QemuOpts *opts = NULL;
if (id) {
- if (!id_wellformed(id)) {
+ if (!qemu_opts_id_wellformed(id)) {
error_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an
identifier");
#if 0 /* conversion from qerror_report() to error_set() broke this: */
error_printf_unless_qmp("Identifiers consist of letters, digits,
'-', '.', '_', starting with a letter.\n");
--
1.8.3.1
