Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

### - b -

- bCBWCBLength : usb_msc_cbw
- bCBWLUN : usb_msc_cbw
- bcr : sdmmc_slot
- bCSWStatus : usb_msc_csw
- bdev : msc_func , block_request
- blk_segs_pending : msc_func
- block_descriptor_length : scsi_mode_param_header6 , scsi_mode_param_header10
- block_len : sbc_slba_block_desc , sbc_read_capacity10_data
- block_req : msc_func
- block_size : sdmmc_card , block_copy_request , block_device , sdmmc_request
- blocks : sdmmc_request
- blocks_allocated : block_copy_request
- blocks_pr_buf : block_copy_request
- blocks_queued : msc_func
- blocks_total : msc_func
- bmCBWFlags : usb_msc_cbw
- buf_list : block_request , dmac_request , sdmmc_request , usb_request
- buf_list_done : sdmmc_request
- buffer_list : block_copy_request
- bulk_in_ep : msc_func
- bulk_out_ep : msc_func
- burst_length : dmac_request
- bus_width : sdmmc_slot
- bus_width_max : sdmmc_slot
- busy_asc : msc_func
- busy_cb : msc_func
- busy_cb_data : msc_func
- bytes_xfered : dmac_request , usb_request , sdmmc_request