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block: do not check bdrv_file_open

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The set of BlockDrivers that have .bdrv_file_open coincides with those
that have .protocol_name and guess what---checking drv->bdrv_file_open
is done to see if the driver is a protocol.  So check drv->protocol_name
instead.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-11-24 16:21:18 +01:00
parent ae8b45d293
commit 41770f6e6f
1 changed files with 5 additions and 6 deletions
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11
block.c
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@ -926,7 +926,6 @@ BlockDriver *bdrv_find_protocol(const char *filename,
int i;
GLOBAL_STATE_CODE();
/* TODO Drivers without bdrv_file_open must be specified explicitly */
/*
* XXX(hch): we really should not let host device detection
@ -1983,7 +1982,7 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
open_flags = bdrv_open_flags(bs, bs->open_flags);
node_name = qemu_opt_get(opts, "node-name");
assert(!drv->bdrv_file_open || file == NULL);
assert(!drv->protocol_name || file == NULL);
ret = bdrv_open_driver(bs, drv, node_name, options, open_flags, errp);
if (ret < 0) {
goto fail_opts;
@ -2084,7 +2083,7 @@ static int bdrv_fill_options(QDict **options, const char *filename,
}
/* If the user has explicitly specified the driver, this choice should
* override the BDRV_O_PROTOCOL flag */
protocol = drv->bdrv_file_open;
protocol = drv->protocol_name;
}
if (protocol) {
@ -4123,7 +4122,7 @@ bdrv_open_inherit(const char *filename, const char *reference, QDict *options,
}
/* BDRV_O_PROTOCOL must be set iff a protocol BDS is about to be created */
assert(!!(flags & BDRV_O_PROTOCOL) == !!drv->bdrv_file_open);
assert(!!(flags & BDRV_O_PROTOCOL) == !!drv->protocol_name);
/* file must be NULL if a protocol BDS is about to be created
* (the inverse results in an error message from bdrv_open_common()) */
assert(!(flags & BDRV_O_PROTOCOL) || !file);
@ -5971,7 +5970,7 @@ int64_t coroutine_fn bdrv_co_get_allocated_file_size(BlockDriverState *bs)
return drv->bdrv_co_get_allocated_file_size(bs);
}
if (drv->bdrv_file_open) {
if (drv->protocol_name) {
/*
* Protocol drivers default to -ENOTSUP (most of their data is
* not stored in any of their children (if they even have any),
@ -8030,7 +8029,7 @@ void bdrv_refresh_filename(BlockDriverState *bs)
* Both of these conditions are represented by generate_json_filename.
*/
if (primary_child_bs->exact_filename[0] &&
primary_child_bs->drv->bdrv_file_open &&
primary_child_bs->drv->protocol_name &&
!drv->is_filter && !generate_json_filename)
{
strcpy(bs->exact_filename, primary_child_bs->exact_filename);