diff options
| -rw-r--r-- | block/ll_rw_blk.c | 42 | ||||
| -rw-r--r-- | fs/bio.c | 23 |
2 files changed, 38 insertions, 27 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index dfe0948..b55ed0d 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; @@ -1006,13 +1006,14 @@ void bio_check_pages_dirty(struct bio *bio) * @error: error, if any * * Description: - * bio_endio() will end I/O on @bytes_done number of bytes. This may be - * just a partial part of the bio, or it may be the whole bio. bio_endio() - * is the preferred way to end I/O on a bio, it takes care of decrementing - * bi_size and clearing BIO_UPTODATE on error. @error is 0 on success, and - * and one of the established -Exxxx (-EIO, for instance) error values in - * case something went wrong. Noone should call bi_end_io() directly on - * a bio unless they own it and thus know that it has an end_io function. + * bio_endio() will end I/O on @bytes_done number of bytes. This + * must always be the whole (remaining) bio. bio_endio() is the + * preferred way to end I/O on a bio, it takes care of clearing + * BIO_UPTODATE on error. @error is 0 on success, and and one of the + * established -Exxxx (-EIO, for instance) error values in case + * something went wrong. Noone should call bi_end_io() directly on a + * bio unless they own it and thus know that it has an end_io + * function. **/ void bio_endio(struct bio *bio, unsigned int bytes_done, int error) { @@ -1021,16 +1022,14 @@ void bio_endio(struct bio *bio, unsigned int bytes_done, int error) else if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) error = -EIO; - if (unlikely(bytes_done > bio->bi_size)) { + if (unlikely(bytes_done != bio->bi_size)) { printk("%s: want %u bytes done, only %u left\n", __FUNCTION__, bytes_done, bio->bi_size); bytes_done = bio->bi_size; } - bio->bi_size -= bytes_done; - bio->bi_sector += (bytes_done >> 9); - - if (bio->bi_size && bio->bi_end_io) + bio->bi_size = 0; /* expected by some callees - will be removed */ + if (bio->bi_end_io) bio->bi_end_io(bio, bytes_done, error); } |
