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block: New BdrvChildRole.activate() for blk_resume_after_migration()

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Instead of manually calling blk_resume_after_migration() in migration
code after doing bdrv_invalidate_cache_all(), integrate the BlockBackend
activation with cache invalidation into a single function. This is
achieved with a new callback in BdrvChildRole that is called by
bdrv_invalidate_cache_all().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2017-05-04 18:52:37 +02:00
parent ace21a5875
commit 4417ab7adf
7 changed files with 44 additions and 43 deletions
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12
block.c
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@ -3949,7 +3949,7 @@ void bdrv_init_with_whitelist(void)
void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
{
BdrvChild *child;
BdrvChild *child, *parent;
Error *local_err = NULL;
int ret;
@ -3985,6 +3985,16 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
error_setg_errno(errp, -ret, "Could not refresh total sector count");
return;
}
QLIST_FOREACH(parent, &bs->parents, next_parent) {
if (parent->role->activate) {
parent->role->activate(parent, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
}
}
void bdrv_invalidate_cache_all(Error **errp)