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block: unmap and free user mapped integrity via submitter 

The user mapped intergity is copied back and unpinned by
bio_integrity_free which is a low-level routine. Do it via the submitter
rather than doing it in the low-level block layer code, to split the
submitter side from the consumer side of the bio.

Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20240610111144.14647-1-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Anuj Gupta 2024-06-10 16:41:44 +05:30 committed by Jens Axboe
parent d0321c812d
commit e038ee6189
3 changed files with 39 additions and 6 deletions
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26
block/bio-integrity.c
View File

@ -144,16 +144,38 @@ void bio_integrity_free(struct bio *bio)
struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_set *bs = bio->bi_pool;
if (bip->bip_flags & BIP_INTEGRITY_USER)
return;
if (bip->bip_flags & BIP_BLOCK_INTEGRITY)
kfree(bvec_virt(bip->bip_vec));
else if (bip->bip_flags & BIP_INTEGRITY_USER)
bio_integrity_unmap_user(bip);
__bio_integrity_free(bs, bip);
bio->bi_integrity = NULL;
bio->bi_opf &= ~REQ_INTEGRITY;
}
/**
* bio_integrity_unmap_free_user - Unmap and free bio user integrity payload
* @bio: bio containing bip to be unmapped and freed
*
* Description: Used to unmap and free the user mapped integrity portion of a
* bio. Submitter attaching the user integrity buffer is responsible for
* unmapping and freeing it during completion.
*/
void bio_integrity_unmap_free_user(struct bio *bio)
{
struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_set *bs = bio->bi_pool;
if (WARN_ON_ONCE(!(bip->bip_flags & BIP_INTEGRITY_USER)))
return;
bio_integrity_unmap_user(bip);
__bio_integrity_free(bs, bip);
bio->bi_integrity = NULL;
bio->bi_opf &= ~REQ_INTEGRITY;
}
EXPORT_SYMBOL(bio_integrity_unmap_free_user);
/**
* bio_integrity_add_page - Attach integrity metadata
* @bio: bio to update

15
drivers/nvme/host/ioctl.c
View File

@ -111,6 +111,13 @@ static struct request *nvme_alloc_user_request(struct request_queue *q,
return req;
}
static void nvme_unmap_bio(struct bio *bio)
{
if (bio_integrity(bio))
bio_integrity_unmap_free_user(bio);
blk_rq_unmap_user(bio);
}
static int nvme_map_user_request(struct request *req, u64 ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
u32 meta_seed, struct io_uring_cmd *ioucmd, unsigned int flags)
@ -157,7 +164,7 @@ static int nvme_map_user_request(struct request *req, u64 ubuffer,
out_unmap:
if (bio)
blk_rq_unmap_user(bio);
nvme_unmap_bio(bio);
out:
blk_mq_free_request(req);
return ret;
@ -195,7 +202,7 @@ static int nvme_submit_user_cmd(struct request_queue *q,
if (result)
*result = le64_to_cpu(nvme_req(req)->result.u64);
if (bio)
blk_rq_unmap_user(bio);
nvme_unmap_bio(bio);
blk_mq_free_request(req);
if (effects)
@ -406,7 +413,7 @@ static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd,
struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
if (pdu->bio)
blk_rq_unmap_user(pdu->bio);
nvme_unmap_bio(pdu->bio);
io_uring_cmd_done(ioucmd, pdu->status, pdu->result, issue_flags);
}
@ -432,7 +439,7 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req,
*/
if (blk_rq_is_poll(req)) {
if (pdu->bio)
blk_rq_unmap_user(pdu->bio);
nvme_unmap_bio(pdu->bio);
io_uring_cmd_iopoll_done(ioucmd, pdu->result, pdu->status);
} else {
io_uring_cmd_do_in_task_lazy(ioucmd, nvme_uring_task_cb);

4
include/linux/bio.h
View File

@ -731,6 +731,7 @@ static inline bool bioset_initialized(struct bio_set *bs)
bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
int bio_integrity_map_user(struct bio *bio, void __user *ubuf, ssize_t len, u32 seed);
void bio_integrity_unmap_free_user(struct bio *bio);
extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);
extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int);
extern bool bio_integrity_prep(struct bio *);
@ -807,6 +808,9 @@ static inline int bio_integrity_map_user(struct bio *bio, void __user *ubuf,
{
return -EINVAL;
}
static inline void bio_integrity_unmap_free_user(struct bio *bio)
{
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */