path: root/block/bio-integrity.c
diff options
authorChristoph Hellwig <>2015-07-20 15:29:37 +0200
committerJens Axboe <>2015-07-29 08:55:15 -0600
commit4246a0b63bd8f56a1469b12eafeb875b1041a451 (patch)
tree3281bb158d658ef7f208ad380c0ecee600a5ab5e /block/bio-integrity.c
parent0034af036554c39eefd14d835a8ec3496ac46712 (diff)
block: add a bi_error field to struct bio
Currently we have two different ways to signal an I/O error on a BIO: (1) by clearing the BIO_UPTODATE flag (2) by returning a Linux errno value to the bi_end_io callback The first one has the drawback of only communicating a single possible error (-EIO), and the second one has the drawback of not beeing persistent when bios are queued up, and are not passed along from child to parent bio in the ever more popular chaining scenario. Having both mechanisms available has the additional drawback of utterly confusing driver authors and introducing bugs where various I/O submitters only deal with one of them, and the others have to add boilerplate code to deal with both kinds of error returns. So add a new bi_error field to store an errno value directly in struct bio and remove the existing mechanisms to clean all this up. Signed-off-by: Christoph Hellwig <> Reviewed-by: Hannes Reinecke <> Reviewed-by: NeilBrown <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'block/bio-integrity.c')
1 files changed, 5 insertions, 6 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 719b7152aed1..4aecca79374a 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -355,13 +355,12 @@ static void bio_integrity_verify_fn(struct work_struct *work)
container_of(work, struct bio_integrity_payload, bip_work);
struct bio *bio = bip->bip_bio;
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
- int error;
- error = bio_integrity_process(bio, bi->verify_fn);
+ bio->bi_error = bio_integrity_process(bio, bi->verify_fn);
/* Restore original bio completion handler */
bio->bi_end_io = bip->bip_end_io;
- bio_endio(bio, error);
+ bio_endio(bio);
@@ -376,7 +375,7 @@ static void bio_integrity_verify_fn(struct work_struct *work)
* in process context. This function postpones completion
* accordingly.
-void bio_integrity_endio(struct bio *bio, int error)
+void bio_integrity_endio(struct bio *bio)
struct bio_integrity_payload *bip = bio_integrity(bio);
@@ -386,9 +385,9 @@ void bio_integrity_endio(struct bio *bio, int error)
* integrity metadata. Restore original bio end_io handler
* and run it.
- if (error) {
+ if (bio->bi_error) {
bio->bi_end_io = bip->bip_end_io;
- bio_endio(bio, error);
+ bio_endio(bio);