Archipelago » qemu

/* the following structure holds the state of one quorum instance */

typedef struct BDRVQuorumState {

    BlockDriverState **bs; /* children BlockDriverStates */

    int num_children;      /* children count */

    int threshold;         /* if less than threshold children reads gave the

                            * same result a quorum error occurs.

                            */

    bool is_blkverify;     /* true if the driver is in blkverify mode

                            * Writes are mirrored on two children devices.

                            * On reads the two children devices' contents are

                            * compared and if a difference is spotted its

                            * location is printed and the code aborts.

                            * It is useful to debug other block drivers by

                            * comparing them with a reference one.

                            */

} BDRVQuorumState;

static BlockDriver bdrv_quorum = {

    .format_name        = "quorum",

    .protocol_name      = "quorum",

    .instance_size      = sizeof(BDRVQuorumState),

};

static void bdrv_quorum_init(void)

{

    bdrv_register(&bdrv_quorum);

}

block_init(bdrv_quorum_init);