Commit 7e7b7cba authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

xen_disk: implement BLKIF_OP_FLUSH_DISKCACHE, remove BLKIF_OP_WRITE_BARRIER 



Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
parent 9e496d74

hw/xen_disk.c

+4 −5
Original line number Diff line number Diff line
@@ -243,12 +243,11 @@ static int ioreq_parse(struct ioreq *ioreq) 
    case BLKIF_OP_READ:

        ioreq->prot = PROT_WRITE; /* to memory */

        break;

    case BLKIF_OP_WRITE_BARRIER:

        if (!ioreq->req.nr_segments) {

    case BLKIF_OP_FLUSH_DISKCACHE:

        ioreq->presync = 1;

        if (!ioreq->req.nr_segments) {

            return 0;

        }

        ioreq->presync = ioreq->postsync = 1;

        /* fall through */

    case BLKIF_OP_WRITE:

        ioreq->prot = PROT_READ; /* from memory */
@@ -509,7 +508,7 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq) 
                       qemu_aio_complete, ioreq);

        break;

    case BLKIF_OP_WRITE:

    case BLKIF_OP_WRITE_BARRIER:

    case BLKIF_OP_FLUSH_DISKCACHE:

        if (!ioreq->req.nr_segments) {

            break;

        }
@@ -794,7 +793,7 @@ static int blk_init(struct XenDevice *xendev) 
                  blkdev->file_size, blkdev->file_size >> 20);



    /* fill info */

    xenstore_write_be_int(&blkdev->xendev, "feature-barrier", 1);

    xenstore_write_be_int(&blkdev->xendev, "feature-flush-cache", 1);

    xenstore_write_be_int(&blkdev->xendev, "feature-persistent", 1);

    xenstore_write_be_int(&blkdev->xendev, "info",            info);

    xenstore_write_be_int(&blkdev->xendev, "sector-size",     blkdev->file_blk);