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block: remove bio_integrity_process

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Move the bvec interation into the generate/verify helpers to avoid a bit
of argument passing churn.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240626045950.189758-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-06-26 06:59:38 +02:00 • committed by Jens Axboe
parent df3c485e0e
commit d19b46340b
4 changed files with 79 additions and 81 deletions
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47
block/bio-integrity.c
View file

@ -374,44 +374,6 @@ free_bvec:
}
EXPORT_SYMBOL_GPL(bio_integrity_map_user);
/**
* bio_integrity_process - Process integrity metadata for a bio
* @bio: bio to generate/verify integrity metadata for
* @proc_iter: iterator to process
*/
static blk_status_t bio_integrity_process(struct bio *bio,
struct bvec_iter *proc_iter)
{
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
struct bio_integrity_payload *bip = bio_integrity(bio);
blk_status_t ret = BLK_STS_OK;
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.seed = proc_iter->bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
__bio_for_each_segment(bv, bio, bviter, *proc_iter) {
void *kaddr = bvec_kmap_local(&bv);
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
if (bio_data_dir(bio) == WRITE)
blk_integrity_generate(&iter, bi);
else
ret = blk_integrity_verify(&iter, bi);
kunmap_local(kaddr);
if (ret)
break;
}
return ret;
}
/**
* bio_integrity_prep - Prepare bio for integrity I/O
* @bio: bio to prepare
@ -490,7 +452,7 @@ bool bio_integrity_prep(struct bio *bio)
/* Auto-generate integrity metadata if this is a write */
if (bio_data_dir(bio) == WRITE)
bio_integrity_process(bio, &bio->bi_iter);
blk_integrity_generate(bio);
else
bip->bio_iter = bio->bi_iter;
return true;
@ -516,12 +478,7 @@ 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;
/*
* At the moment verify is called bio's iterator was advanced
* during split and completion, we need to rewind iterator to
* it's original position.
*/
bio->bi_status = bio_integrity_process(bio, &bip->bio_iter);
blk_integrity_verify(bio);
bio_integrity_free(bio);
bio_endio(bio);
}

7
block/blk.h
View file

@ -9,7 +9,6 @@
#include <xen/xen.h>
#include "blk-crypto-internal.h"
struct blk_integrity_iter;
struct elevator_type;
/* Max future timer expiry for timeouts */
@ -681,10 +680,8 @@ int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,
const struct blk_holder_ops *hops, struct file *bdev_file);
int bdev_permission(dev_t dev, blk_mode_t mode, void *holder);
void blk_integrity_generate(struct blk_integrity_iter *iter,
struct blk_integrity *bi);
blk_status_t blk_integrity_verify(struct blk_integrity_iter *iter,
struct blk_integrity *bi);
void blk_integrity_generate(struct bio *bio);
void blk_integrity_verify(struct bio *bio);
void blk_integrity_prepare(struct request *rq);
void blk_integrity_complete(struct request *rq, unsigned int nr_bytes);

97
block/t10-pi.c
View file

@ -13,6 +13,15 @@
#include <asm/unaligned.h>
#include "blk.h"
struct blk_integrity_iter {
void *prot_buf;
void *data_buf;
sector_t seed;
unsigned int data_size;
unsigned short interval;
const char *disk_name;
};
static __be16 t10_pi_csum(__be16 csum, void *data, unsigned int len,
unsigned char csum_type)
{
@ -364,33 +373,77 @@ static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
}
}
void blk_integrity_generate(struct blk_integrity_iter *iter,
struct blk_integrity *bi)
void blk_integrity_generate(struct bio *bio)
{
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
ext_pi_crc64_generate(iter, bi);
break;
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
t10_pi_generate(iter, bi);
break;
default:
break;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct bio_integrity_payload *bip = bio_integrity(bio);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.seed = bio->bi_iter.bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
bio_for_each_segment(bv, bio, bviter) {
void *kaddr = bvec_kmap_local(&bv);
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
ext_pi_crc64_generate(&iter, bi);
break;
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
t10_pi_generate(&iter, bi);
break;
default:
break;
}
kunmap_local(kaddr);
}
}
blk_status_t blk_integrity_verify(struct blk_integrity_iter *iter,
struct blk_integrity *bi)
void blk_integrity_verify(struct bio *bio)
{
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
return ext_pi_crc64_verify(iter, bi);
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
return t10_pi_verify(iter, bi);
default:
return BLK_STS_OK;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
struct bio_integrity_payload *bip = bio_integrity(bio);
struct blk_integrity_iter iter;
struct bvec_iter bviter;
struct bio_vec bv;
/*
* At the moment verify is called bi_iter has been advanced during split
* and completion, so use the copy created during submission here.
*/
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
iter.seed = bip->bio_iter.bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
__bio_for_each_segment(bv, bio, bviter, bip->bio_iter) {
void *kaddr = bvec_kmap_local(&bv);
blk_status_t ret = BLK_STS_OK;
iter.data_buf = kaddr;
iter.data_size = bv.bv_len;
switch (bi->csum_type) {
case BLK_INTEGRITY_CSUM_CRC64:
ret = ext_pi_crc64_verify(&iter, bi);
break;
case BLK_INTEGRITY_CSUM_CRC:
case BLK_INTEGRITY_CSUM_IP:
ret = t10_pi_verify(&iter, bi);
break;
default:
break;
}
kunmap_local(kaddr);
if (ret) {
bio->bi_status = ret;
return;
}
}
}

9
include/linux/blk-integrity.h
View file

@ -14,15 +14,6 @@ enum blk_integrity_flags {
BLK_INTEGRITY_STACKED = 1 << 4,
};
struct blk_integrity_iter {
void *prot_buf;
void *data_buf;
sector_t seed;
unsigned int data_size;
unsigned short interval;
const char *disk_name;
};
const char *blk_integrity_profile_name(struct blk_integrity *bi);
bool queue_limits_stack_integrity(struct queue_limits *t,
struct queue_limits *b);