This patch adds macros to get the size of request in bytes. They are useful because blk_end_request() takes bytes as a completed I/O size instead of sectors. Signed-off-by: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> --- blkdev.h | 9 +++++++++ 1 files changed, 9 insertions(+) diff -rupN 01-blkendreq-interface/include/linux/blkdev.h 02-sect2byte-macro/include/linux/blkdev.h --- 01-blkendreq-interface/include/linux/blkdev.h 2007-08-23 17:22:50.000000000 -0400 +++ 02-sect2byte-macro/include/linux/blkdev.h 2007-08-23 17:25:59.000000000 -0400 @@ -737,6 +737,15 @@ extern void end_request(struct request * extern void blk_complete_request(struct request *); /* + * blk_end_request() takes bytes instead of sectors as a complete size. + * blk_rq_size() returns the entire size left to complete in the request. + * blk_rq_cur_size() returns the size left to complete in the current segment. + */ +#define sect2byte(nr_sectors) ((nr_sectors) << 9) +#define blk_rq_size(rq) (sect2byte((rq)->hard_nr_sectors)) +#define blk_rq_cur_size(rq) (sect2byte((rq)->current_nr_sectors)) + +/* * end_that_request_first/chunk() takes an uptodate argument. we account * any value <= as an io error. 0 means -EIO for compatability reasons, * any other < 0 value is the direct error type. An uptodate value of -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
