The block device transfer request is used to read or write a number of blocks from or to the device. More...
#include <blkdev.h>
Collaboration diagram for rtems_blkdev_request:
Data Fields | |
| rtems_blkdev_request_op | req |
| Block device operation (read or write). | |
| rtems_blkdev_request_cb | done |
| Request done callback function. | |
| void * | done_arg |
| Argument to be passed to callback function. | |
| rtems_status_code | status |
| Last IO operation completion status. | |
| uint32_t | bufnum |
| Number of blocks for this request. | |
| rtems_id | io_task |
| The task requesting the IO operation. | |
| rtems_blkdev_sg_buffer | bufs [RTEMS_ZERO_LENGTH_ARRAY] |
| List of scatter or gather buffers. | |
Detailed Description
The block device transfer request is used to read or write a number of blocks from or to the device.
Transfer requests are issued to the disk device driver with the RTEMS_BLKIO_REQUEST IO control. The transfer request completion status must be signalled with rtems_blkdev_request_done(). This function must be called exactly once per request. The return value of the IO control will be ignored for transfer requests.
- See also
- rtems_blkdev_create().
The documentation for this struct was generated from the following file:
- /mnt/data0/chrisj/rtems/releases/rtems-release.git/4.11.3/ws-rtems/rtems-4.11.3/cpukit/libblock/include/rtems/blkdev.h
