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bio-integrity: stop abusing bi_end_io

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And instead call directly into the integrity code from bio_end_io.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2017-07-03 16:58:43 -06:00
committed by Jens Axboe
parent 63573e359d
commit 7c20f11680
4 changed files with 25 additions and 39 deletions
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39
block/bio-integrity.c
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@@ -102,7 +102,7 @@ EXPORT_SYMBOL(bio_integrity_alloc);
* Description: Used to free the integrity portion of a bio. Usually
* called from bio_free().
*/
void bio_integrity_free(struct bio *bio)
static void bio_integrity_free(struct bio *bio)
{
struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_set *bs = bio->bi_pool;
@@ -120,8 +120,8 @@ void bio_integrity_free(struct bio *bio)
}
bio->bi_integrity = NULL;
bio->bi_opf &= ~REQ_INTEGRITY;
}
EXPORT_SYMBOL(bio_integrity_free);
/**
* bio_integrity_add_page - Attach integrity metadata
@@ -326,12 +326,6 @@ bool bio_integrity_prep(struct bio *bio)
offset = 0;
}
/* Install custom I/O completion handler if read verify is enabled */
if (bio_data_dir(bio) == READ) {
bip->bip_end_io = bio->bi_end_io;
bio->bi_end_io = bio_integrity_endio;
}
/* Auto-generate integrity metadata if this is a write */
if (bio_data_dir(bio) == WRITE) {
bio_integrity_process(bio, &bio->bi_iter,
@@ -375,13 +369,12 @@ static void bio_integrity_verify_fn(struct work_struct *work)
bio->bi_status = BLK_STS_IOERR;
}
/* Restore original bio completion handler */
bio->bi_end_io = bip->bip_end_io;
bio_integrity_free(bio);
bio_endio(bio);
}
/**
* bio_integrity_endio - Integrity I/O completion function
* __bio_integrity_endio - Integrity I/O completion function
* @bio: Protected bio
* @error: Pointer to errno
*
@@ -392,27 +385,19 @@ 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)
bool __bio_integrity_endio(struct bio *bio)
{
struct bio_integrity_payload *bip = bio_integrity(bio);
if (bio_op(bio) == REQ_OP_READ && !bio->bi_status) {
struct bio_integrity_payload *bip = bio_integrity(bio);
BUG_ON(bip->bip_bio != bio);
/* In case of an I/O error there is no point in verifying the
* integrity metadata. Restore original bio end_io handler
* and run it.
*/
if (bio->bi_status) {
bio->bi_end_io = bip->bip_end_io;
bio_endio(bio);
return;
INIT_WORK(&bip->bip_work, bio_integrity_verify_fn);
queue_work(kintegrityd_wq, &bip->bip_work);
return false;
}
INIT_WORK(&bip->bip_work, bio_integrity_verify_fn);
queue_work(kintegrityd_wq, &bip->bip_work);
bio_integrity_free(bio);
return true;
}
EXPORT_SYMBOL(bio_integrity_endio);
/**
* bio_integrity_advance - Advance integrity vector