Chapter 16. Block Devices
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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