aboutsummaryrefslogtreecommitdiff
path: root/block/blk-lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'block/blk-lib.c')
-rw-r--r--block/blk-lib.c69
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