Commit d42a8a93 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

block: Introduce parents list 



Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Reviewed-by: default avatarFam Zheng <famz@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent a2d61900

block.c

+3 −0
Original line number Diff line number Diff line
@@ -1090,6 +1090,7 @@ static BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, 
    };



    QLIST_INSERT_HEAD(&parent_bs->children, child, next);

    QLIST_INSERT_HEAD(&child_bs->parents, child, next_parent);



    return child;

}
@@ -1097,6 +1098,7 @@ static BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, 
void bdrv_detach_child(BdrvChild *child)

{

    QLIST_REMOVE(child, next);

    QLIST_REMOVE(child, next_parent);

    g_free(child);

}
@@ -2038,6 +2040,7 @@ static void bdrv_move_reference_fields(BlockDriverState *bs_dest, 
    /* keep the same entry in bdrv_states */

    bs_dest->device_list = bs_src->device_list;

    bs_dest->blk = bs_src->blk;

    bs_dest->parents = bs_src->parents;



    memcpy(bs_dest->op_blockers, bs_src->op_blockers,

           sizeof(bs_dest->op_blockers));

include/block/block_int.h

+2 −0
Original line number Diff line number Diff line
@@ -339,6 +339,7 @@ struct BdrvChild { 
    BlockDriverState *bs;

    const BdrvChildRole *role;

    QLIST_ENTRY(BdrvChild) next;

    QLIST_ENTRY(BdrvChild) next_parent;

};



/*
@@ -445,6 +446,7 @@ struct BlockDriverState { 
     * parent node of this node. */

    BlockDriverState *inherits_from;

    QLIST_HEAD(, BdrvChild) children;

    QLIST_HEAD(, BdrvChild) parents;



    QDict *options;

    BlockdevDetectZeroesOptions detect_zeroes;