Method update_writeback

vhost_user_block/src/lib.rs:280–300

(&mut self)

    }

    fn update_writeback(&mut self) {
        // Use writeback from config if VIRTIO_BLK_F_CONFIG_WCE
        let writeback = if self.acked_features & (1 << VIRTIO_BLK_F_CONFIG_WCE)
            == 1 << VIRTIO_BLK_F_CONFIG_WCE
        {
            self.config.writeback == 1
        } else {
            // Else check if VIRTIO_BLK_F_FLUSH negotiated
            self.acked_features & (1 << VIRTIO_BLK_F_FLUSH) == 1 << VIRTIO_BLK_F_FLUSH
        };

        info!(
            "Changing cache mode to {}",
            if writeback {
                "writeback"
            } else {
                "writethrough"
            }
        );
        self.writeback.store(writeback, Ordering::Release);
    }
}

impl VhostUserBackendMut for VhostUserBlkBackend {