Commit 54815311 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

raw: Support BDRV_REQ_FUA 



Pass through the FUA flag to the lower layer so that the separate flush
can be saved in practically relevant cases where a (raw) format driver
sits on top of the protocol driver.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent 2b556518

block/raw_bsd.c

+14 −3
Original line number Diff line number Diff line
@@ -57,8 +57,9 @@ static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num, 
    return bdrv_co_readv(bs->file->bs, sector_num, nb_sectors, qiov);

}



static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,

                                      int nb_sectors, QEMUIOVector *qiov)

static int coroutine_fn

raw_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors,

                    QEMUIOVector *qiov, int flags)

{

    void *buf = NULL;

    BlockDriver *drv;
@@ -104,7 +105,8 @@ static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num, 
    }



    BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);

    ret = bdrv_co_writev(bs->file->bs, sector_num, nb_sectors, qiov);

    ret = bdrv_co_do_pwritev(bs->file->bs, sector_num * BDRV_SECTOR_SIZE,

                             nb_sectors * BDRV_SECTOR_SIZE, qiov, flags);



fail:

    if (qiov == &local_qiov) {
@@ -114,6 +116,13 @@ fail: 
    return ret;

}



static int coroutine_fn

raw_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors,

              QEMUIOVector *qiov)

{

    return raw_co_writev_flags(bs, sector_num, nb_sectors, qiov, 0);

}



static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,

                                            int64_t sector_num,

                                            int nb_sectors, int *pnum,
@@ -248,6 +257,8 @@ BlockDriver bdrv_raw = { 
    .bdrv_create          = &raw_create,

    .bdrv_co_readv        = &raw_co_readv,

    .bdrv_co_writev       = &raw_co_writev,

    .bdrv_co_writev_flags = &raw_co_writev_flags,

    .supported_write_flags = BDRV_REQ_FUA,

    .bdrv_co_write_zeroes = &raw_co_write_zeroes,

    .bdrv_co_discard      = &raw_co_discard,

    .bdrv_co_get_block_status = &raw_co_get_block_status,