Chapter 16. Block Devices

Table of Contents

blk_get_backing_dev_info - get the address of a queue's backing_dev_info
generic_unplug_device - fire a request queue
blk_start_queue - restart a previously stopped queue
blk_stop_queue - stop a queue
blk_sync_queue - cancel any pending callbacks on a queue
__blk_run_queue - run a single device queue
blk_run_queue - run a single device queue
blk_init_queue - prepare a request queue for use with a block device
blk_start_queueing - initiate dispatch of requests to device
blk_requeue_request - put a request back on queue
blk_insert_request - insert a special request in to a request queue
submit_bio -
blk_complete_request - end I/O on a request
blk_rq_bytes - Returns bytes left to complete in the entire request
blk_rq_cur_bytes - Returns bytes left to complete in the current segment
end_queued_request - end all I/O on a queued request
end_dequeued_request - end all I/O on a dequeued request
end_request - end I/O on the current segment of the request
blk_end_request - Helper function for drivers to complete the request.
__blk_end_request - Helper function for drivers to complete the request.
blk_end_bidi_request - Helper function for drivers to complete bidi request.
blk_end_request_callback - Special helper function for tricky drivers
__generic_make_request -
__end_that_request_first - end I/O on a request
blk_end_io - Generic end_io function to complete a request.
blk_rq_map_user - map user data to a request, for REQ_BLOCK_PC usage
blk_rq_unmap_user - unmap a request with user data
blk_rq_map_kern - map kernel data to a request, for REQ_BLOCK_PC usage
blk_release_queue - release a struct request_queue when it is no longer needed
blk_queue_prep_rq - set a prepare_request function for queue
blk_queue_merge_bvec - set a merge_bvec function for queue
blk_queue_make_request - define an alternate make_request function for a device
blk_queue_bounce_limit - set bounce buffer limit for queue
blk_queue_max_sectors - set max sectors for a request for this queue
blk_queue_max_phys_segments - set max phys segments for a request for this queue
blk_queue_max_hw_segments - set max hw segments for a request for this queue
blk_queue_max_segment_size - set max segment size for blk_rq_map_sg
blk_queue_hardsect_size - set hardware sector size for the queue
blk_queue_stack_limits - inherit underlying queue limits for stacked drivers
blk_queue_dma_pad - set pad mask
blk_queue_dma_drain - Set up a drain buffer for excess dma.
blk_queue_segment_boundary - set boundary rules for segment merging
blk_queue_dma_alignment - set dma length and memory alignment
blk_queue_update_dma_alignment - update dma length and memory alignment
blk_end_sync_rq - executes a completion event on a request
blk_execute_rq_nowait - insert a request into queue for execution
blk_execute_rq - insert a request into queue for execution
blk_queue_ordered - does this queue support ordered writes
blkdev_issue_flush - queue a flush
blk_queue_find_tag - find a request by its tag and queue
blk_free_tags - release a given set of tag maintenance info
blk_queue_free_tags - release tag maintenance info
blk_init_tags - initialize the tag info for an external tag map
blk_queue_init_tags - initialize the queue tag info
blk_queue_resize_tags - change the queueing depth
blk_queue_end_tag - end tag operations for a request
blk_queue_start_tag - find a free tag and assign it
blk_queue_invalidate_tags - invalidate all pending tags
__blk_free_tags - release a given set of tag maintenance info
__blk_queue_free_tags - release tag maintenance info