* metadata. nr_vecs specifies the maximum number of pages containing
* integrity metadata that can be attached.
*/
-struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio, gfp_t gfp_mask, unsigned int nr_vecs, struct bio_set *bs)
+struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
+ gfp_t gfp_mask,
+ unsigned int nr_vecs,
+ struct bio_set *bs)
{
struct bio_integrity_payload *bip;
struct bio_vec *iv;
* metadata. nr_vecs specifies the maximum number of pages containing
* integrity metadata that can be attached.
*/
-struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp_mask, unsigned int nr_vecs)
+struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
+ gfp_t gfp_mask,
+ unsigned int nr_vecs)
{
return bio_integrity_alloc_bioset(bio, gfp_mask, nr_vecs, fs_bio_set);
}
BUG_ON(bip == NULL);
/* A cloned bio doesn't own the integrity metadata */
- if (!bio_flagged(bio, BIO_CLONED) && bip->bip_buf != NULL)
+ if (!bio_flagged(bio, BIO_CLONED) && !bio_flagged(bio, BIO_FS_INTEGRITY)
+ && bip->bip_buf != NULL)
kfree(bip->bip_buf);
- mempool_free(bip->bip_vec, bs->bvec_pools[bip->bip_pool]);
+ bvec_free_bs(bs, bip->bip_vec, bip->bip_pool);
mempool_free(bip, bs->bio_integrity_pool);
bio->bi_integrity = NULL;
iv = bip_vec_idx(bip, bip->bip_vcnt);
BUG_ON(iv == NULL);
- BUG_ON(iv->bv_page != NULL);
iv->bv_page = page;
iv->bv_len = len;
}
EXPORT_SYMBOL(bio_integrity_add_page);
+static int bdev_integrity_enabled(struct block_device *bdev, int rw)
+{
+ struct blk_integrity *bi = bdev_get_integrity(bdev);
+
+ if (bi == NULL)
+ return 0;
+
+ if (rw == READ && bi->verify_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_READ))
+ return 1;
+
+ if (rw == WRITE && bi->generate_fn != NULL &&
+ (bi->flags & INTEGRITY_FLAG_WRITE))
+ return 1;
+
+ return 0;
+}
+
/**
* bio_integrity_enabled - Check whether integrity can be passed
* @bio: bio to check
* sector size of the storage device. Convert the block layer sectors
* to physical sectors.
*/
-static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi, unsigned int sectors)
+static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
+ unsigned int sectors)
{
/* At this point there are only 512b or 4096b DIF/EPP devices */
if (bi->sector_size == 4096)
if (bi->tag_size == 0)
return -1;
- nr_sectors = bio_integrity_hw_sectors(bi, DIV_ROUND_UP(len, bi->tag_size));
+ nr_sectors = bio_integrity_hw_sectors(bi,
+ DIV_ROUND_UP(len, bi->tag_size));
if (nr_sectors * bi->tuple_size > bip->bip_size) {
printk(KERN_ERR "%s: tag too big for bio: %u > %u\n",
}
}
+static inline unsigned short blk_integrity_tuple_size(struct blk_integrity *bi)
+{
+ if (bi)
+ return bi->tuple_size;
+
+ return 0;
+}
+
/**
* bio_integrity_prep - Prepare bio for integrity I/O
* @bio: bio to prepare
if (ret) {
kunmap_atomic(kaddr, KM_USER0);
- break;
+ return ret;
}
sectors = bv->bv_len / bi->sector_size;
*/
static void bio_integrity_verify_fn(struct work_struct *work)
{
- struct bio_integrity_payload *bip =
+ struct bio_integrity_payload *bip =
container_of(work, struct bio_integrity_payload, bip_work);
struct bio *bio = bip->bip_bio;
- int error = bip->bip_error;
+ int error;
- if (bio_integrity_verify(bio)) {
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- error = -EIO;
- }
+ error = bio_integrity_verify(bio);
/* Restore original bio completion handler */
bio->bi_end_io = bip->bip_end_io;
-
- if (bio->bi_end_io)
- bio->bi_end_io(bio, error);
+ bio_endio(bio, error);
}
/**
BUG_ON(bip->bip_bio != bio);
- bip->bip_error = error;
+ /* 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 (error) {
+ bio->bi_end_io = bip->bip_end_io;
+ bio_endio(bio, error);
+
+ return;
+ }
+
INIT_WORK(&bip->bip_work, bio_integrity_verify_fn);
queue_work(kintegrityd_wq, &bip->bip_work);
}
* @bip: Integrity vector to advance
* @skip: Number of bytes to advance it
*/
-void bio_integrity_mark_head(struct bio_integrity_payload *bip, unsigned int skip)
+void bio_integrity_mark_head(struct bio_integrity_payload *bip,
+ unsigned int skip)
{
struct bio_vec *iv;
unsigned int i;
* @bip: Integrity vector to truncate
* @len: New length of integrity vector
*/
-void bio_integrity_mark_tail(struct bio_integrity_payload *bip, unsigned int len)
+void bio_integrity_mark_tail(struct bio_integrity_payload *bip,
+ unsigned int len)
{
struct bio_vec *iv;
unsigned int i;
* and the length will be truncated corresponding to 'len' data
* sectors.
*/
-void bio_integrity_trim(struct bio *bio, unsigned int offset, unsigned int sectors)
+void bio_integrity_trim(struct bio *bio, unsigned int offset,
+ unsigned int sectors)
{
struct bio_integrity_payload *bip = bio->bi_integrity;
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
* bio_integrity_clone - Callback for cloning bios with integrity metadata
* @bio: New bio
* @bio_src: Original bio
+ * @gfp_mask: Memory allocation mask
* @bs: bio_set to allocate bip from
*
* Description: Called to allocate a bip when cloning a bio
*/
-int bio_integrity_clone(struct bio *bio, struct bio *bio_src, struct bio_set *bs)
+int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
+ gfp_t gfp_mask, struct bio_set *bs)
{
struct bio_integrity_payload *bip_src = bio_src->bi_integrity;
struct bio_integrity_payload *bip;
BUG_ON(bip_src == NULL);
- bip = bio_integrity_alloc_bioset(bio, GFP_NOIO, bip_src->bip_vcnt, bs);
+ bip = bio_integrity_alloc_bioset(bio, gfp_mask, bip_src->bip_vcnt, bs);
if (bip == NULL)
return -EIO;
bio_integrity_slab = KMEM_CACHE(bio_integrity_payload,
SLAB_HWCACHE_ALIGN|SLAB_PANIC);
}
-EXPORT_SYMBOL(bio_integrity_init_slab);
static int __init integrity_init(void)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff