From 5bb23a688b2de23d7765a1dd439d89c038378978 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 27 Sep 2007 12:46:13 +0200 Subject: Don't decrement bi_size in bio_endio The only caller of bio_endio that does not pass the full bi_size is end_that_request_first. Also, no ->bi_end_io method is really interested in bi_size being decremented. So move the decrement and related code into ll_rw_blk and merge it with order_bio_endio to form req_bio_endio which does endio functionality specific to request completion. As some ->bi_end_io methods do check bi_size of 0, we set it thus for now, but that will go in the next patch. Signed-off-by: Neil Brown ### Diffstat output ./block/ll_rw_blk.c | 42 +++++++++++++++++++++++++++--------------- ./fs/bio.c | 23 +++++++++++------------ 2 files changed, 38 insertions(+), 27 deletions(-) diff .prev/block/ll_rw_blk.c ./block/ll_rw_blk.c Signed-off-by: Jens Axboe --- block/ll_rw_blk.c | 42 +++++++++++++++++++++++++++--------------- 1 file changed, 27 insertions(+), 15 deletions(-) (limited to 'block') diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index dfe0948ec8b2..b55ed0df33f0 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -527,22 +527,36 @@ int blk_do_ordered(struct request_queue *q, struct request **rqp) return 1; } -static int ordered_bio_endio(struct request *rq, struct bio *bio, - unsigned int nbytes, int error) +static void req_bio_endio(struct request *rq, struct bio *bio, + unsigned int nbytes, int error) { struct request_queue *q = rq->q; - if (&q->bar_rq != rq) - return 0; + if (&q->bar_rq != rq) { + if (error) + clear_bit(BIO_UPTODATE, &bio->bi_flags); + else if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) + error = -EIO; - /* - * Okay, this is the barrier request in progress, just - * record the error; - */ - if (error && !q->orderr) - q->orderr = error; + if (unlikely(nbytes > bio->bi_size)) { + printk("%s: want %u bytes done, only %u left\n", + __FUNCTION__, nbytes, bio->bi_size); + nbytes = bio->bi_size; + } - return 1; + bio->bi_size -= nbytes; + bio->bi_sector += (nbytes >> 9); + if (bio->bi_size == 0) + bio_endio(bio, bio->bi_size, error); + } else { + + /* + * Okay, this is the barrier request in progress, just + * record the error; + */ + if (error && !q->orderr) + q->orderr = error; + } } /** @@ -3388,8 +3402,7 @@ static int __end_that_request_first(struct request *req, int uptodate, if (nr_bytes >= bio->bi_size) { req->bio = bio->bi_next; nbytes = bio->bi_size; - if (!ordered_bio_endio(req, bio, nbytes, error)) - bio_endio(bio, nbytes, error); + req_bio_endio(req, bio, nbytes, error); next_idx = 0; bio_nbytes = 0; } else { @@ -3444,8 +3457,7 @@ static int __end_that_request_first(struct request *req, int uptodate, * if the request wasn't completed, update state */ if (bio_nbytes) { - if (!ordered_bio_endio(req, bio, bio_nbytes, error)) - bio_endio(bio, bio_nbytes, error); + req_bio_endio(req, bio, bio_nbytes, error); bio->bi_idx += next_idx; bio_iovec(bio)->bv_offset += nr_bytes; bio_iovec(bio)->bv_len -= nr_bytes; -- cgit v1.2.3