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blk_update_request
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
blk_update_request - Special helper function for request stacking driversSYNOPSIS
- 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
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