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authorJens Axboe <axboe@kernel.dk>2013-03-24 21:38:59 -0600
committerJens Axboe <axboe@kernel.dk>2013-03-24 21:38:59 -0600
commit705cd0ea1cde2ce9225f1485c5a32c5841cacc5f (patch)
tree72bc2c5eded0e04fc5e70ca2bd6df93a2e264112 /block/blk-core.c
parentc8158819d506a8aedeca53c52dfb709a0aabe011 (diff)
parent29ed7813ce5c4661261aeebddb1b8660e0860223 (diff)
downloadlinux-linaro-stable-705cd0ea1cde2ce9225f1485c5a32c5841cacc5f.tar.gz
Merge branch 'for-jens' of http://evilpiepirate.org/git/linux-bcache into for-3.10/core
This contains Kents prep work for the immutable bio_vecs.
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c82
1 files changed, 13 insertions, 69 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 441f3488a766..f224d1793ee5 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -159,20 +159,10 @@ static void req_bio_endio(struct request *rq, struct bio *bio,
else if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
error = -EIO;
- if (unlikely(nbytes > bio->bi_size)) {
- printk(KERN_ERR "%s: want %u bytes done, %u left\n",
- __func__, nbytes, bio->bi_size);
- nbytes = bio->bi_size;
- }
-
if (unlikely(rq->cmd_flags & REQ_QUIET))
set_bit(BIO_QUIET, &bio->bi_flags);
- bio->bi_size -= nbytes;
- bio->bi_sector += (nbytes >> 9);
-
- if (bio_integrity(bio))
- bio_integrity_advance(bio, nbytes);
+ bio_advance(bio, nbytes);
/* don't actually finish bio if it's part of flush sequence */
if (bio->bi_size == 0 && !(rq->cmd_flags & REQ_FLUSH_SEQ))
@@ -1609,7 +1599,7 @@ static void handle_bad_sector(struct bio *bio)
printk(KERN_INFO "%s: rw=%ld, want=%Lu, limit=%Lu\n",
bdevname(bio->bi_bdev, b),
bio->bi_rw,
- (unsigned long long)bio->bi_sector + bio_sectors(bio),
+ (unsigned long long)bio_end_sector(bio),
(long long)(i_size_read(bio->bi_bdev->bd_inode) >> 9));
set_bit(BIO_EOF, &bio->bi_flags);
@@ -2292,8 +2282,7 @@ EXPORT_SYMBOL(blk_fetch_request);
**/
bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
{
- int total_bytes, bio_nbytes, next_idx = 0;
- struct bio *bio;
+ int total_bytes;
if (!req->bio)
return false;
@@ -2339,56 +2328,21 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
blk_account_io_completion(req, nr_bytes);
- total_bytes = bio_nbytes = 0;
- while ((bio = req->bio) != NULL) {
- int nbytes;
+ total_bytes = 0;
+ while (req->bio) {
+ struct bio *bio = req->bio;
+ unsigned bio_bytes = min(bio->bi_size, nr_bytes);
- if (nr_bytes >= bio->bi_size) {
+ if (bio_bytes == bio->bi_size)
req->bio = bio->bi_next;
- nbytes = bio->bi_size;
- req_bio_endio(req, bio, nbytes, error);
- next_idx = 0;
- bio_nbytes = 0;
- } else {
- int idx = bio->bi_idx + next_idx;
-
- if (unlikely(idx >= bio->bi_vcnt)) {
- blk_dump_rq_flags(req, "__end_that");
- printk(KERN_ERR "%s: bio idx %d >= vcnt %d\n",
- __func__, idx, bio->bi_vcnt);
- break;
- }
-
- nbytes = bio_iovec_idx(bio, idx)->bv_len;
- BIO_BUG_ON(nbytes > bio->bi_size);
-
- /*
- * not a complete bvec done
- */
- if (unlikely(nbytes > nr_bytes)) {
- bio_nbytes += nr_bytes;
- total_bytes += nr_bytes;
- break;
- }
- /*
- * advance to the next vector
- */
- next_idx++;
- bio_nbytes += nbytes;
- }
+ req_bio_endio(req, bio, bio_bytes, error);
- total_bytes += nbytes;
- nr_bytes -= nbytes;
+ total_bytes += bio_bytes;
+ nr_bytes -= bio_bytes;
- bio = req->bio;
- if (bio) {
- /*
- * end more in this run, or just return 'not-done'
- */
- if (unlikely(nr_bytes <= 0))
- break;
- }
+ if (!nr_bytes)
+ break;
}
/*
@@ -2404,16 +2358,6 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
return false;
}
- /*
- * if the request wasn't completed, update state
- */
- if (bio_nbytes) {
- 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;
- }
-
req->__data_len -= total_bytes;
req->buffer = bio_data(req->bio);