linux-imx

        ((unsigned)bio->bi_iter.bi_sector & (o->split_boundary - 1));

​

    if (bio_sectors(bio) > available_sectors)

        dm_accept_partial_bio(bio, available_sectors);

​

    /* Only tell snapshots if this is a write */

    return do_origin(o->dev, bio);

}

​

/*

 * Set the target "max_io_len" field to the minimum of all the snapshots'

 * chunk sizes.

 */

static void origin_resume(struct dm_target *ti)

{

    struct dm_origin *o = ti->private;

​

    o->split_boundary = get_origin_minimum_chunksize(o->dev->bdev);

​

    .version = {1, 9, 0},

    .module  = THIS_MODULE,

    .ctr     = origin_ctr,

    .dtr     = origin_dtr,

    .map     = origin_map,

    .resume  = origin_resume,

    .postsuspend = origin_postsuspend,

    .status  = origin_status,

    .iterate_devices = origin_iterate_devices,

};

​

static struct target_type snapshot_target = {

    .name    = "snapshot",

    .version = {1, 15, 0},

    .module  = THIS_MODULE,

    .ctr     = snapshot_ctr,

    .dtr     = snapshot_dtr,

    .map     = snapshot_map,

    .end_io  = snapshot_end_io,