| BLK_UPDATE_REQUEST(9) - phpMan
BLK_UPDATE_REQUEST(9) Block Devices BLK_UPDATE_REQUEST(9)
NAME
blk_update_request - Special helper function for request stacking drivers
SYNOPSIS
bool blk_update_request(struct request * req, int error, unsigned int nr_bytes);
ARGUMENTS
req
the request being processed
error
0 for success, < 0 for error
nr_bytes
number of bytes to complete req
DESCRIPTION
Ends I/O on a number of bytes attached to req, but doesn't complete the request structure
even if req doesn't have leftover. If req has leftover, sets it up for the next range of
segments.
This special helper function is only for request stacking drivers (e.g. request-based dm)
so that they can handle partial completion. Actual device drivers should use
blk_end_request instead.
Passing the result of blk_rq_bytes as nr_bytes guarantees false return from this function.
RETURN
false - this request doesn't have any more data true - this request has more data
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 BLK_UPDATE_REQUEST(9)
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