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block: Drop child_backing

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Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-25-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2020-05-13 13:05:34 +02:00 committed by Kevin Wolf
parent 25191e5ff0
commit ff3541c4e2
2 changed files with 3 additions and 58 deletions
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60
block.c
View File

@ -1215,15 +1215,6 @@ static void bdrv_backing_attach(BdrvChild *c)
parent->backing_blocker);
}
/* XXX: Will be removed along with child_backing */
static void bdrv_child_cb_attach_backing(BdrvChild *c)
{
if (!(c->role & BDRV_CHILD_COW)) {
bdrv_backing_attach(c);
}
bdrv_child_cb_attach(c);
}
static void bdrv_backing_detach(BdrvChild *c)
{
BlockDriverState *parent = c->opaque;
@ -1234,28 +1225,6 @@ static void bdrv_backing_detach(BdrvChild *c)
parent->backing_blocker = NULL;
}
/* XXX: Will be removed along with child_backing */
static void bdrv_child_cb_detach_backing(BdrvChild *c)
{
if (!(c->role & BDRV_CHILD_COW)) {
bdrv_backing_detach(c);
}
bdrv_child_cb_detach(c);
}
/*
* Returns the options and flags that bs->backing should get, based on the
* given options and flags for the parent BDS
*/
static void bdrv_backing_options(BdrvChildRole role, bool parent_is_format,
int *child_flags, QDict *child_options,
int parent_flags, QDict *parent_options)
{
bdrv_inherited_options(BDRV_CHILD_COW, true,
child_flags, child_options,
parent_flags, parent_options);
}
static int bdrv_backing_update_filename(BdrvChild *c, BlockDriverState *base,
const char *filename, Error **errp)
{
@ -1283,21 +1252,6 @@ static int bdrv_backing_update_filename(BdrvChild *c, BlockDriverState *base,
return ret;
}
const BdrvChildClass child_backing = {
.parent_is_bds = true,
.get_parent_desc = bdrv_child_get_parent_desc,
.attach = bdrv_child_cb_attach_backing,
.detach = bdrv_child_cb_detach_backing,
.inherit_options = bdrv_backing_options,
.drained_begin = bdrv_child_cb_drained_begin,
.drained_poll = bdrv_child_cb_drained_poll,
.drained_end = bdrv_child_cb_drained_end,
.inactivate = bdrv_child_cb_inactivate,
.update_filename = bdrv_backing_update_filename,
.can_set_aio_ctx = bdrv_child_cb_can_set_aio_ctx,
.set_aio_ctx = bdrv_child_cb_set_aio_ctx,
};
/*
* Returns the options and flags that a generic child of a BDS should
* get, based on the given options and flags for the parent BDS.
@ -2446,8 +2400,7 @@ static void bdrv_default_perms_for_cow(BlockDriverState *bs, BdrvChild *c,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
assert(child_class == &child_backing ||
(child_class == &child_of_bds && (role & BDRV_CHILD_COW)));
assert(child_class == &child_of_bds && (role & BDRV_CHILD_COW));
/*
* We want consistent read from backing files if the parent needs it.
@ -2566,23 +2519,16 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c,
uint64_t perm, uint64_t shared,
uint64_t *nperm, uint64_t *nshared)
{
bool backing = (child_class == &child_backing);
if (child_class == &child_of_bds) {
bdrv_default_perms(bs, c, child_class, role, reopen_queue,
perm, shared, nperm, nshared);
return;
}
assert(child_class == &child_backing || child_class == &child_file);
assert(child_class == &child_file);
if (!backing) {
bdrv_default_perms_for_storage(bs, c, child_class, role, reopen_queue,
perm, shared, nperm, nshared);
} else {
bdrv_default_perms_for_cow(bs, c, child_class, role, reopen_queue,
bdrv_default_perms_for_storage(bs, c, child_class, role, reopen_queue,
perm, shared, nperm, nshared);
}
}
void bdrv_default_perms(BlockDriverState *bs, BdrvChild *c,

1
include/block/block_int.h
View File

@ -742,7 +742,6 @@ struct BdrvChildClass {
extern const BdrvChildClass child_of_bds;
extern const BdrvChildClass child_file;
extern const BdrvChildClass child_backing;
struct BdrvChild {
BlockDriverState *bs;