diff --git a/block.c b/block.c
index 183fec8aa5..2df65c88bf 100644
--- a/block.c
+++ b/block.c
@@ -417,7 +417,7 @@ int bdrv_create_file(const char* filename, QEMUOptionParameter *options)
{
BlockDriver *drv;
- drv = bdrv_find_protocol(filename);
+ drv = bdrv_find_protocol(filename, true);
if (drv == NULL) {
return -ENOENT;
}
@@ -482,7 +482,8 @@ static BlockDriver *find_hdev_driver(const char *filename)
return drv;
}
-BlockDriver *bdrv_find_protocol(const char *filename)
+BlockDriver *bdrv_find_protocol(const char *filename,
+ bool allow_protocol_prefix)
{
BlockDriver *drv1;
char protocol[128];
@@ -503,9 +504,10 @@ BlockDriver *bdrv_find_protocol(const char *filename)
return drv1;
}
- if (!path_has_protocol(filename)) {
+ if (!path_has_protocol(filename) || !allow_protocol_prefix) {
return bdrv_find_format("file");
}
+
p = strchr(filename, ':');
assert(p != NULL);
len = p - filename;
@@ -784,6 +786,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename,
BlockDriverState *bs;
BlockDriver *drv;
const char *drvname;
+ bool allow_protocol_prefix = false;
int ret;
/* NULL means an empty set of options */
@@ -800,6 +803,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename,
filename = qdict_get_try_str(options, "filename");
} else if (filename && !qdict_haskey(options, "filename")) {
qdict_put(options, "filename", qstring_from_str(filename));
+ allow_protocol_prefix = true;
} else {
qerror_report(ERROR_CLASS_GENERIC_ERROR, "Can't specify 'file' and "
"'filename' options at the same time");
@@ -813,7 +817,10 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename,
drv = bdrv_find_whitelisted_format(drvname, !(flags & BDRV_O_RDWR));
qdict_del(options, "driver");
} else if (filename) {
- drv = bdrv_find_protocol(filename);
+ drv = bdrv_find_protocol(filename, allow_protocol_prefix);
+ if (!drv) {
+ qerror_report(ERROR_CLASS_GENERIC_ERROR, "Unknown protocol");
+ }
} else {
qerror_report(ERROR_CLASS_GENERIC_ERROR,
"Must specify either driver or file");
@@ -4452,7 +4459,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
return;
}
- proto_drv = bdrv_find_protocol(filename);
+ proto_drv = bdrv_find_protocol(filename, true);
if (!proto_drv) {
error_setg(errp, "Unknown protocol '%s'", filename);
return;
diff --git a/block/sheepdog.c b/block/sheepdog.c
index b397b5b4d3..6a41ad9b3c 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1510,7 +1510,7 @@ static int sd_create(const char *filename, QEMUOptionParameter *options)
BlockDriver *drv;
/* Currently, only Sheepdog backing image is supported. */
- drv = bdrv_find_protocol(backing_file);
+ drv = bdrv_find_protocol(backing_file, true);
if (!drv || strcmp(drv->protocol_name, "sheepdog") != 0) {
error_report("backing_file must be a sheepdog image");
ret = -EINVAL;
diff --git a/include/block/block.h b/include/block/block.h
index dd8eca1be1..eeb48162af 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -111,7 +111,8 @@ bool bdrv_io_limits_enabled(BlockDriverState *bs);
void bdrv_init(void);
void bdrv_init_with_whitelist(void);
-BlockDriver *bdrv_find_protocol(const char *filename);
+BlockDriver *bdrv_find_protocol(const char *filename,
+ bool allow_protocol_prefix);
BlockDriver *bdrv_find_format(const char *format_name);
BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
bool readonly);
diff --git a/qemu-img.c b/qemu-img.c
index f8c97d34d1..c55ca5c557 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -240,7 +240,7 @@ static int print_block_option_help(const char *filename, const char *fmt)
return 1;
}
- proto_drv = bdrv_find_protocol(filename);
+ proto_drv = bdrv_find_protocol(filename, true);
if (!proto_drv) {
error_report("Unknown protocol '%s'", filename);
return 1;
@@ -1261,7 +1261,7 @@ static int img_convert(int argc, char **argv)
goto out;
}
- proto_drv = bdrv_find_protocol(out_filename);
+ proto_drv = bdrv_find_protocol(out_filename, true);
if (!proto_drv) {
error_report("Unknown protocol '%s'", out_filename);
ret = -1;
diff --git a/tests/qemu-iotests/051 b/tests/qemu-iotests/051
index 8039e23ab3..1cf8bf79b6 100755
--- a/tests/qemu-iotests/051
+++ b/tests/qemu-iotests/051
@@ -149,6 +149,18 @@ echo
run_qemu -drive file=$TEST_IMG,file.driver=file
run_qemu -drive file=$TEST_IMG,file.driver=qcow2
+echo
+echo === Parsing protocol from file name ===
+echo
+
+# Protocol strings are supposed to be parsed from traditional option strings,
+# but not when using driver-specific options. We can distinguish them by the
+# error message for non-existing files.
+
+run_qemu -hda foo:bar
+run_qemu -drive file=foo:bar
+run_qemu -drive file.filename=foo:bar
+
# success, all done
echo "*** done"
rm -f $seq.full
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index 3d1ac7b7da..6b3d63612e 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -169,4 +169,18 @@ Testing: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: Can't use 'qcow2' as a block driver for the protocol level
QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: could not open disk image TEST_DIR/t.qcow2: Invalid argument
+
+=== Parsing protocol from file name ===
+
+Testing: -hda foo:bar
+QEMU_PROG: -hda foo:bar: Unknown protocol
+QEMU_PROG: -hda foo:bar: could not open disk image foo:bar: No such file or directory
+
+Testing: -drive file=foo:bar
+QEMU_PROG: -drive file=foo:bar: Unknown protocol
+QEMU_PROG: -drive file=foo:bar: could not open disk image foo:bar: No such file or directory
+
+Testing: -drive file.filename=foo:bar
+QEMU_PROG: -drive file.filename=foo:bar: could not open disk image ide0-hd0: No such file or directory
+
*** done