diff options
| -rw-r--r-- | block/blk-lib.c | 69 |
1 files changed, 29 insertions, 40 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index 25de73e4759b..9260cb0b209b 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -9,17 +9,23 @@ #include "blk.h" -static void blkdev_discard_end_io(struct bio *bio, int err) +struct bio_batch { + atomic_t done; + unsigned long flags; + struct completion *wait; +}; + +static void bio_batch_end_io(struct bio *bio, int err) { + struct bio_batch *bb = bio->bi_private; + if (err) { if (err == -EOPNOTSUPP) - set_bit(BIO_EOPNOTSUPP, &bio->bi_flags); - clear_bit(BIO_UPTODATE, &bio->bi_flags); + set_bit(BIO_EOPNOTSUPP, &bb->flags); + clear_bit(BIO_UPTODATE, &bb->flags); } - - if (bio->bi_private) - complete(bio->bi_private); - + if (atomic_dec_and_test(&bb->done)) + complete(bb->wait); bio_put(bio); } @@ -41,6 +47,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, struct request_queue *q = bdev_get_queue(bdev); int type = REQ_WRITE | REQ_DISCARD; unsigned int max_discard_sectors; + struct bio_batch bb; struct bio *bio; int ret = 0; @@ -67,7 +74,11 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, type |= REQ_SECURE; } - while (nr_sects && !ret) { + atomic_set(&bb.done, 1); + bb.flags = 1 << BIO_UPTODATE; + bb.wait = &wait; + + while (nr_sects) { bio = bio_alloc(gfp_mask, 1); if (!bio) { ret = -ENOMEM; @@ -75,9 +86,9 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, } bio->bi_sector = sector; - bio->bi_end_io = blkdev_discard_end_io; + bio->bi_end_io = bio_batch_end_io; bio->bi_bdev = bdev; - bio->bi_private = &wait; + bio->bi_private = &bb; if (nr_sects > max_discard_sectors) { bio->bi_size = max_discard_sectors << 9; @@ -88,45 +99,23 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, nr_sects = 0; } - bio_get(bio); + atomic_inc(&bb.done); submit_bio(type, bio); + } + /* Wait for bios in-flight */ + if (!atomic_dec_and_test(&bb.done)) wait_for_completion(&wait); - if (bio_flagged(bio, BIO_EOPNOTSUPP)) - ret = -EOPNOTSUPP; - else if (!bio_flagged(bio, BIO_UPTODATE)) - ret = -EIO; - bio_put(bio); - } + if (test_bit(BIO_EOPNOTSUPP, &bb.flags)) + ret = -EOPNOTSUPP; + else if (!test_bit(BIO_UPTODATE, &bb.flags)) + ret = -EIO; return ret; } EXPORT_SYMBOL(blkdev_issue_discard); -struct bio_batch -{ - atomic_t done; - unsigned long flags; - struct completion *wait; -}; - -static void bio_batch_end_io(struct bio *bio, int err) -{ - struct bio_batch *bb = bio->bi_private; - - if (err) { - if (err == -EOPNOTSUPP) - set_bit(BIO_EOPNOTSUPP, &bb->flags); - else - clear_bit(BIO_UPTODATE, &bb->flags); - } - if (bb) - if (atomic_dec_and_test(&bb->done)) - complete(bb->wait); - bio_put(bio); -} - /** * blkdev_issue_zeroout - generate number of zero filed write bios * @bdev: blockdev to issue |