From e9f5f44ad3725335d9c559c3c22cd3726152a7b1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 13 Jun 2024 10:48:15 +0200 Subject: [PATCH] block: remove the blk_integrity_profile structure Block layer integrity configuration is a bit complex right now, as it indirects through operation vectors for a simple two-dimensional configuration: a) the checksum type of none, ip checksum, crc, crc64 b) the presence or absence of a reference tag Remove the integrity profile, and instead add a separate csum_type flag which replaces the existing ip-checksum field and a new flag that indicates the presence of the reference tag. This removes up to two layers of indirect calls, remove the need to offload the no-op verification of non-PI metadata to a workqueue and generally simplifies the code. The downside is that block/t10-pi.c now has to be built into the kernel when CONFIG_BLK_DEV_INTEGRITY is supported. Given that both nvme and SCSI require t10-pi.ko, it is loaded for all usual configurations that enabled CONFIG_BLK_DEV_INTEGRITY already, though. Signed-off-by: Christoph Hellwig Reviewed-by: Kanchan Joshi Reviewed-by: Hannes Reinecke Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20240613084839.1044015-6-hch@lst.de Signed-off-by: Jens Axboe --- block/Kconfig | 8 +- block/Makefile | 3 +- block/bio-integrity.c | 32 ++-- block/blk-integrity.c | 66 ++++---- block/blk-mq.c | 13 +- block/blk.h | 8 + block/t10-pi.c | 239 ++++++++++------------------ drivers/md/dm-crypt.c | 2 +- drivers/nvme/host/Kconfig | 1 - drivers/nvme/host/core.c | 17 +- drivers/nvme/target/Kconfig | 1 - drivers/nvme/target/io-cmd-bdev.c | 16 +- drivers/scsi/Kconfig | 1 - drivers/scsi/sd_dif.c | 19 +-- drivers/target/target_core_iblock.c | 53 +++--- include/linux/blk-integrity.h | 35 ++-- include/linux/blkdev.h | 9 +- include/linux/t10-pi.h | 8 - 18 files changed, 216 insertions(+), 315 deletions(-) diff --git a/block/Kconfig b/block/Kconfig index dc12af58dbae..5b623b876d3b 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -62,6 +62,8 @@ config BLK_DEV_BSGLIB config BLK_DEV_INTEGRITY bool "Block layer data integrity support" + select CRC_T10DIF + select CRC64_ROCKSOFT help Some storage devices allow extra information to be stored/retrieved to help protect the data. The block layer @@ -72,12 +74,6 @@ config BLK_DEV_INTEGRITY T10/SCSI Data Integrity Field or the T13/ATA External Path Protection. If in doubt, say N. -config BLK_DEV_INTEGRITY_T10 - tristate - depends on BLK_DEV_INTEGRITY - select CRC_T10DIF - select CRC64_ROCKSOFT - config BLK_DEV_WRITE_MOUNTED bool "Allow writing to mounted block devices" default y diff --git a/block/Makefile b/block/Makefile index 168150b9c510..ddfd21c1a9ff 100644 --- a/block/Makefile +++ b/block/Makefile @@ -26,8 +26,7 @@ obj-$(CONFIG_MQ_IOSCHED_KYBER) += kyber-iosched.o bfq-y := bfq-iosched.o bfq-wf2q.o bfq-cgroup.o obj-$(CONFIG_IOSCHED_BFQ) += bfq.o -obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o -obj-$(CONFIG_BLK_DEV_INTEGRITY_T10) += t10-pi.o +obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o t10-pi.o obj-$(CONFIG_BLK_MQ_PCI) += blk-mq-pci.o obj-$(CONFIG_BLK_MQ_VIRTIO) += blk-mq-virtio.o obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o diff --git a/block/bio-integrity.c b/block/bio-integrity.c index af7f71d16114..31dbc2853f92 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -378,10 +378,9 @@ 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 - * @proc_fn: Pointer to the relevant processing function */ static blk_status_t bio_integrity_process(struct bio *bio, - struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) + struct bvec_iter *proc_iter) { struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); struct blk_integrity_iter iter; @@ -392,17 +391,18 @@ static blk_status_t bio_integrity_process(struct bio *bio, iter.disk_name = bio->bi_bdev->bd_disk->disk_name; iter.interval = 1 << bi->interval_exp; - iter.tuple_size = bi->tuple_size; iter.seed = proc_iter->bi_sector; iter.prot_buf = bvec_virt(bip->bip_vec); - iter.pi_offset = bi->pi_offset; __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; - ret = proc_fn(&iter); + if (bio_data_dir(bio) == WRITE) + blk_integrity_generate(&iter, bi); + else + ret = blk_integrity_verify(&iter, bi); kunmap_local(kaddr); if (ret) @@ -448,12 +448,10 @@ bool bio_integrity_prep(struct bio *bio) return true; if (bio_data_dir(bio) == READ) { - if (!bi->profile->verify_fn || - !(bi->flags & BLK_INTEGRITY_VERIFY)) + if (!(bi->flags & BLK_INTEGRITY_VERIFY)) return true; } else { - if (!bi->profile->generate_fn || - !(bi->flags & BLK_INTEGRITY_GENERATE)) + if (!(bi->flags & BLK_INTEGRITY_GENERATE)) return true; /* @@ -488,7 +486,7 @@ bool bio_integrity_prep(struct bio *bio) bip->bip_flags |= BIP_BLOCK_INTEGRITY; bip_set_seed(bip, bio->bi_iter.bi_sector); - if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM) + if (bi->csum_type == BLK_INTEGRITY_CSUM_IP) bip->bip_flags |= BIP_IP_CHECKSUM; /* Map it */ @@ -511,12 +509,10 @@ 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, - bi->profile->generate_fn); - } else { + if (bio_data_dir(bio) == WRITE) + bio_integrity_process(bio, &bio->bi_iter); + else bip->bio_iter = bio->bi_iter; - } return true; err_end_io: @@ -539,15 +535,13 @@ static void bio_integrity_verify_fn(struct work_struct *work) struct bio_integrity_payload *bip = container_of(work, struct bio_integrity_payload, bip_work); struct bio *bio = bip->bip_bio; - struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); /* * 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, - bi->profile->verify_fn); + bio->bi_status = bio_integrity_process(bio, &bip->bio_iter); bio_integrity_free(bio); bio_endio(bio); } @@ -569,7 +563,7 @@ 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 && - (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->profile->verify_fn) { + (bip->bip_flags & BIP_BLOCK_INTEGRITY) && bi->csum_type) { INIT_WORK(&bip->bip_work, bio_integrity_verify_fn); queue_work(kintegrityd_wq, &bip->bip_work); return false; diff --git a/block/blk-integrity.c b/block/blk-integrity.c index ccbeb6dfa87a..17d37badfbb8 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -123,10 +123,10 @@ int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2) struct blk_integrity *b1 = &gd1->queue->integrity; struct blk_integrity *b2 = &gd2->queue->integrity; - if (!b1->profile && !b2->profile) + if (!b1->tuple_size && !b2->tuple_size) return 0; - if (!b1->profile || !b2->profile) + if (!b1->tuple_size || !b2->tuple_size) return -1; if (b1->interval_exp != b2->interval_exp) { @@ -150,10 +150,13 @@ int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2) return -1; } - if (b1->profile != b2->profile) { + if (b1->csum_type != b2->csum_type || + (b1->flags & BLK_INTEGRITY_REF_TAG) != + (b2->flags & BLK_INTEGRITY_REF_TAG)) { pr_err("%s: %s/%s type %s != %s\n", __func__, gd1->disk_name, gd2->disk_name, - b1->profile->name, b2->profile->name); + blk_integrity_profile_name(b1), + blk_integrity_profile_name(b2)); return -1; } @@ -217,14 +220,37 @@ static inline struct blk_integrity *dev_to_bi(struct device *dev) return &dev_to_disk(dev)->queue->integrity; } +const char *blk_integrity_profile_name(struct blk_integrity *bi) +{ + switch (bi->csum_type) { + case BLK_INTEGRITY_CSUM_IP: + if (bi->flags & BLK_INTEGRITY_REF_TAG) + return "T10-DIF-TYPE1-IP"; + return "T10-DIF-TYPE3-IP"; + case BLK_INTEGRITY_CSUM_CRC: + if (bi->flags & BLK_INTEGRITY_REF_TAG) + return "T10-DIF-TYPE1-CRC"; + return "T10-DIF-TYPE3-CRC"; + case BLK_INTEGRITY_CSUM_CRC64: + if (bi->flags & BLK_INTEGRITY_REF_TAG) + return "EXT-DIF-TYPE1-CRC64"; + return "EXT-DIF-TYPE3-CRC64"; + case BLK_INTEGRITY_CSUM_NONE: + break; + } + + return "nop"; +} +EXPORT_SYMBOL_GPL(blk_integrity_profile_name); + static ssize_t format_show(struct device *dev, struct device_attribute *attr, char *page) { struct blk_integrity *bi = dev_to_bi(dev); - if (bi->profile && bi->profile->name) - return sysfs_emit(page, "%s\n", bi->profile->name); - return sysfs_emit(page, "none\n"); + if (!bi->tuple_size) + return sysfs_emit(page, "none\n"); + return sysfs_emit(page, "%s\n", blk_integrity_profile_name(bi)); } static ssize_t tag_size_show(struct device *dev, struct device_attribute *attr, @@ -326,28 +352,6 @@ const struct attribute_group blk_integrity_attr_group = { .attrs = integrity_attrs, }; -static blk_status_t blk_integrity_nop_fn(struct blk_integrity_iter *iter) -{ - return BLK_STS_OK; -} - -static void blk_integrity_nop_prepare(struct request *rq) -{ -} - -static void blk_integrity_nop_complete(struct request *rq, - unsigned int nr_bytes) -{ -} - -static const struct blk_integrity_profile nop_profile = { - .name = "nop", - .generate_fn = blk_integrity_nop_fn, - .verify_fn = blk_integrity_nop_fn, - .prepare_fn = blk_integrity_nop_prepare, - .complete_fn = blk_integrity_nop_complete, -}; - /** * blk_integrity_register - Register a gendisk as being integrity-capable * @disk: struct gendisk pointer to make integrity-aware @@ -363,11 +367,11 @@ void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template { struct blk_integrity *bi = &disk->queue->integrity; + bi->csum_type = template->csum_type; bi->flags = BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE | template->flags; bi->interval_exp = template->interval_exp ? : ilog2(queue_logical_block_size(disk->queue)); - bi->profile = template->profile ? template->profile : &nop_profile; bi->tuple_size = template->tuple_size; bi->tag_size = template->tag_size; bi->pi_offset = template->pi_offset; @@ -394,7 +398,7 @@ void blk_integrity_unregister(struct gendisk *disk) { struct blk_integrity *bi = &disk->queue->integrity; - if (!bi->profile) + if (!bi->tuple_size) return; /* ensure all bios are off the integrity workqueue */ diff --git a/block/blk-mq.c b/block/blk-mq.c index 3b4df8e5ac9e..0d4cd39c3d25 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -804,10 +804,8 @@ static void blk_complete_request(struct request *req) if (!bio) return; -#ifdef CONFIG_BLK_DEV_INTEGRITY if (blk_integrity_rq(req) && req_op(req) == REQ_OP_READ) - req->q->integrity.profile->complete_fn(req, total_bytes); -#endif + blk_integrity_complete(req, total_bytes); /* * Upper layers may call blk_crypto_evict_key() anytime after the last @@ -875,11 +873,9 @@ bool blk_update_request(struct request *req, blk_status_t error, if (!req->bio) return false; -#ifdef CONFIG_BLK_DEV_INTEGRITY if (blk_integrity_rq(req) && req_op(req) == REQ_OP_READ && error == BLK_STS_OK) - req->q->integrity.profile->complete_fn(req, nr_bytes); -#endif + blk_integrity_complete(req, nr_bytes); /* * Upper layers may call blk_crypto_evict_key() anytime after the last @@ -1264,10 +1260,9 @@ void blk_mq_start_request(struct request *rq) WRITE_ONCE(rq->state, MQ_RQ_IN_FLIGHT); rq->mq_hctx->tags->rqs[rq->tag] = rq; -#ifdef CONFIG_BLK_DEV_INTEGRITY if (blk_integrity_rq(rq) && req_op(rq) == REQ_OP_WRITE) - q->integrity.profile->prepare_fn(rq); -#endif + blk_integrity_prepare(rq); + if (rq->bio && rq->bio->bi_opf & REQ_POLLED) WRITE_ONCE(rq->bio->bi_cookie, rq->mq_hctx->queue_num); } diff --git a/block/blk.h b/block/blk.h index 189bc25beb50..79e8d5d4fe0c 100644 --- a/block/blk.h +++ b/block/blk.h @@ -9,6 +9,7 @@ #include #include "blk-crypto-internal.h" +struct blk_integrity_iter; struct elevator_type; /* Max future timer expiry for timeouts */ @@ -673,4 +674,11 @@ 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_prepare(struct request *rq); +void blk_integrity_complete(struct request *rq, unsigned int nr_bytes); + #endif /* BLK_INTERNAL_H */ diff --git a/block/t10-pi.c b/block/t10-pi.c index f4cc91156da1..dadecf621497 100644 --- a/block/t10-pi.c +++ b/block/t10-pi.c @@ -11,17 +11,14 @@ #include #include #include +#include "blk.h" -typedef __be16 (csum_fn) (__be16, void *, unsigned int); - -static __be16 t10_pi_crc_fn(__be16 crc, void *data, unsigned int len) +static __be16 t10_pi_csum(__be16 csum, void *data, unsigned int len, + unsigned char csum_type) { - return cpu_to_be16(crc_t10dif_update(be16_to_cpu(crc), data, len)); -} - -static __be16 t10_pi_ip_fn(__be16 csum, void *data, unsigned int len) -{ - return (__force __be16)ip_compute_csum(data, len); + if (csum_type == BLK_INTEGRITY_CSUM_IP) + return (__force __be16)ip_compute_csum(data, len); + return cpu_to_be16(crc_t10dif_update(be16_to_cpu(csum), data, len)); } /* @@ -29,48 +26,44 @@ static __be16 t10_pi_ip_fn(__be16 csum, void *data, unsigned int len) * 16 bit app tag, 32 bit reference tag. Type 3 does not define the ref * tag. */ -static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter, - csum_fn *fn, enum t10_dif_type type) +static void t10_pi_generate(struct blk_integrity_iter *iter, + struct blk_integrity *bi) { - u8 offset = iter->pi_offset; + u8 offset = bi->pi_offset; unsigned int i; for (i = 0 ; i < iter->data_size ; i += iter->interval) { struct t10_pi_tuple *pi = iter->prot_buf + offset; - pi->guard_tag = fn(0, iter->data_buf, iter->interval); + pi->guard_tag = t10_pi_csum(0, iter->data_buf, iter->interval, + bi->csum_type); if (offset) - pi->guard_tag = fn(pi->guard_tag, iter->prot_buf, - offset); + pi->guard_tag = t10_pi_csum(pi->guard_tag, + iter->prot_buf, offset, bi->csum_type); pi->app_tag = 0; - if (type == T10_PI_TYPE1_PROTECTION) + if (bi->flags & BLK_INTEGRITY_REF_TAG) pi->ref_tag = cpu_to_be32(lower_32_bits(iter->seed)); else pi->ref_tag = 0; iter->data_buf += iter->interval; - iter->prot_buf += iter->tuple_size; + iter->prot_buf += bi->tuple_size; iter->seed++; } - - return BLK_STS_OK; } static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter, - csum_fn *fn, enum t10_dif_type type) + struct blk_integrity *bi) { - u8 offset = iter->pi_offset; + u8 offset = bi->pi_offset; unsigned int i; - BUG_ON(type == T10_PI_TYPE0_PROTECTION); - for (i = 0 ; i < iter->data_size ; i += iter->interval) { struct t10_pi_tuple *pi = iter->prot_buf + offset; __be16 csum; - if (type == T10_PI_TYPE1_PROTECTION || - type == T10_PI_TYPE2_PROTECTION) { + if (bi->flags & BLK_INTEGRITY_REF_TAG) { if (pi->app_tag == T10_PI_APP_ESCAPE) goto next; @@ -82,15 +75,17 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter, iter->seed, be32_to_cpu(pi->ref_tag)); return BLK_STS_PROTECTION; } - } else if (type == T10_PI_TYPE3_PROTECTION) { + } else { if (pi->app_tag == T10_PI_APP_ESCAPE && pi->ref_tag == T10_PI_REF_ESCAPE) goto next; } - csum = fn(0, iter->data_buf, iter->interval); + csum = t10_pi_csum(0, iter->data_buf, iter->interval, + bi->csum_type); if (offset) - csum = fn(csum, iter->prot_buf, offset); + csum = t10_pi_csum(csum, iter->prot_buf, offset, + bi->csum_type); if (pi->guard_tag != csum) { pr_err("%s: guard tag error at sector %llu " \ @@ -102,33 +97,13 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter, next: iter->data_buf += iter->interval; - iter->prot_buf += iter->tuple_size; + iter->prot_buf += bi->tuple_size; iter->seed++; } return BLK_STS_OK; } -static blk_status_t t10_pi_type1_generate_crc(struct blk_integrity_iter *iter) -{ - return t10_pi_generate(iter, t10_pi_crc_fn, T10_PI_TYPE1_PROTECTION); -} - -static blk_status_t t10_pi_type1_generate_ip(struct blk_integrity_iter *iter) -{ - return t10_pi_generate(iter, t10_pi_ip_fn, T10_PI_TYPE1_PROTECTION); -} - -static blk_status_t t10_pi_type1_verify_crc(struct blk_integrity_iter *iter) -{ - return t10_pi_verify(iter, t10_pi_crc_fn, T10_PI_TYPE1_PROTECTION); -} - -static blk_status_t t10_pi_type1_verify_ip(struct blk_integrity_iter *iter) -{ - return t10_pi_verify(iter, t10_pi_ip_fn, T10_PI_TYPE1_PROTECTION); -} - /** * t10_pi_type1_prepare - prepare PI prior submitting request to device * @rq: request with PI that should be prepared @@ -225,81 +200,15 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes) } } -static blk_status_t t10_pi_type3_generate_crc(struct blk_integrity_iter *iter) -{ - return t10_pi_generate(iter, t10_pi_crc_fn, T10_PI_TYPE3_PROTECTION); -} - -static blk_status_t t10_pi_type3_generate_ip(struct blk_integrity_iter *iter) -{ - return t10_pi_generate(iter, t10_pi_ip_fn, T10_PI_TYPE3_PROTECTION); -} - -static blk_status_t t10_pi_type3_verify_crc(struct blk_integrity_iter *iter) -{ - return t10_pi_verify(iter, t10_pi_crc_fn, T10_PI_TYPE3_PROTECTION); -} - -static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter) -{ - return t10_pi_verify(iter, t10_pi_ip_fn, T10_PI_TYPE3_PROTECTION); -} - -/* Type 3 does not have a reference tag so no remapping is required. */ -static void t10_pi_type3_prepare(struct request *rq) -{ -} - -/* Type 3 does not have a reference tag so no remapping is required. */ -static void t10_pi_type3_complete(struct request *rq, unsigned int nr_bytes) -{ -} - -const struct blk_integrity_profile t10_pi_type1_crc = { - .name = "T10-DIF-TYPE1-CRC", - .generate_fn = t10_pi_type1_generate_crc, - .verify_fn = t10_pi_type1_verify_crc, - .prepare_fn = t10_pi_type1_prepare, - .complete_fn = t10_pi_type1_complete, -}; -EXPORT_SYMBOL(t10_pi_type1_crc); - -const struct blk_integrity_profile t10_pi_type1_ip = { - .name = "T10-DIF-TYPE1-IP", - .generate_fn = t10_pi_type1_generate_ip, - .verify_fn = t10_pi_type1_verify_ip, - .prepare_fn = t10_pi_type1_prepare, - .complete_fn = t10_pi_type1_complete, -}; -EXPORT_SYMBOL(t10_pi_type1_ip); - -const struct blk_integrity_profile t10_pi_type3_crc = { - .name = "T10-DIF-TYPE3-CRC", - .generate_fn = t10_pi_type3_generate_crc, - .verify_fn = t10_pi_type3_verify_crc, - .prepare_fn = t10_pi_type3_prepare, - .complete_fn = t10_pi_type3_complete, -}; -EXPORT_SYMBOL(t10_pi_type3_crc); - -const struct blk_integrity_profile t10_pi_type3_ip = { - .name = "T10-DIF-TYPE3-IP", - .generate_fn = t10_pi_type3_generate_ip, - .verify_fn = t10_pi_type3_verify_ip, - .prepare_fn = t10_pi_type3_prepare, - .complete_fn = t10_pi_type3_complete, -}; -EXPORT_SYMBOL(t10_pi_type3_ip); - static __be64 ext_pi_crc64(u64 crc, void *data, unsigned int len) { return cpu_to_be64(crc64_rocksoft_update(crc, data, len)); } -static blk_status_t ext_pi_crc64_generate(struct blk_integrity_iter *iter, - enum t10_dif_type type) +static void ext_pi_crc64_generate(struct blk_integrity_iter *iter, + struct blk_integrity *bi) { - u8 offset = iter->pi_offset; + u8 offset = bi->pi_offset; unsigned int i; for (i = 0 ; i < iter->data_size ; i += iter->interval) { @@ -311,17 +220,15 @@ static blk_status_t ext_pi_crc64_generate(struct blk_integrity_iter *iter, iter->prot_buf, offset); pi->app_tag = 0; - if (type == T10_PI_TYPE1_PROTECTION) + if (bi->flags & BLK_INTEGRITY_REF_TAG) put_unaligned_be48(iter->seed, pi->ref_tag); else put_unaligned_be48(0ULL, pi->ref_tag); iter->data_buf += iter->interval; - iter->prot_buf += iter->tuple_size; + iter->prot_buf += bi->tuple_size; iter->seed++; } - - return BLK_STS_OK; } static bool ext_pi_ref_escape(u8 *ref_tag) @@ -332,9 +239,9 @@ static bool ext_pi_ref_escape(u8 *ref_tag) } static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter, - enum t10_dif_type type) + struct blk_integrity *bi) { - u8 offset = iter->pi_offset; + u8 offset = bi->pi_offset; unsigned int i; for (i = 0; i < iter->data_size; i += iter->interval) { @@ -342,7 +249,7 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter, u64 ref, seed; __be64 csum; - if (type == T10_PI_TYPE1_PROTECTION) { + if (bi->flags & BLK_INTEGRITY_REF_TAG) { if (pi->app_tag == T10_PI_APP_ESCAPE) goto next; @@ -353,7 +260,7 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter, iter->disk_name, seed, ref); return BLK_STS_PROTECTION; } - } else if (type == T10_PI_TYPE3_PROTECTION) { + } else { if (pi->app_tag == T10_PI_APP_ESCAPE && ext_pi_ref_escape(pi->ref_tag)) goto next; @@ -374,23 +281,13 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter, next: iter->data_buf += iter->interval; - iter->prot_buf += iter->tuple_size; + iter->prot_buf += bi->tuple_size; iter->seed++; } return BLK_STS_OK; } -static blk_status_t ext_pi_type1_verify_crc64(struct blk_integrity_iter *iter) -{ - return ext_pi_crc64_verify(iter, T10_PI_TYPE1_PROTECTION); -} - -static blk_status_t ext_pi_type1_generate_crc64(struct blk_integrity_iter *iter) -{ - return ext_pi_crc64_generate(iter, T10_PI_TYPE1_PROTECTION); -} - static void ext_pi_type1_prepare(struct request *rq) { struct blk_integrity *bi = &rq->q->integrity; @@ -467,33 +364,61 @@ static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes) } } -static blk_status_t ext_pi_type3_verify_crc64(struct blk_integrity_iter *iter) +void blk_integrity_generate(struct blk_integrity_iter *iter, + struct blk_integrity *bi) { - return ext_pi_crc64_verify(iter, T10_PI_TYPE3_PROTECTION); + 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; + } } -static blk_status_t ext_pi_type3_generate_crc64(struct blk_integrity_iter *iter) +blk_status_t blk_integrity_verify(struct blk_integrity_iter *iter, + struct blk_integrity *bi) { - return ext_pi_crc64_generate(iter, T10_PI_TYPE3_PROTECTION); + 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; + } } -const struct blk_integrity_profile ext_pi_type1_crc64 = { - .name = "EXT-DIF-TYPE1-CRC64", - .generate_fn = ext_pi_type1_generate_crc64, - .verify_fn = ext_pi_type1_verify_crc64, - .prepare_fn = ext_pi_type1_prepare, - .complete_fn = ext_pi_type1_complete, -}; -EXPORT_SYMBOL_GPL(ext_pi_type1_crc64); +void blk_integrity_prepare(struct request *rq) +{ + struct blk_integrity *bi = &rq->q->integrity; -const struct blk_integrity_profile ext_pi_type3_crc64 = { - .name = "EXT-DIF-TYPE3-CRC64", - .generate_fn = ext_pi_type3_generate_crc64, - .verify_fn = ext_pi_type3_verify_crc64, - .prepare_fn = t10_pi_type3_prepare, - .complete_fn = t10_pi_type3_complete, -}; -EXPORT_SYMBOL_GPL(ext_pi_type3_crc64); + if (!(bi->flags & BLK_INTEGRITY_REF_TAG)) + return; + + if (bi->csum_type == BLK_INTEGRITY_CSUM_CRC64) + ext_pi_type1_prepare(rq); + else + t10_pi_type1_prepare(rq); +} + +void blk_integrity_complete(struct request *rq, unsigned int nr_bytes) +{ + struct blk_integrity *bi = &rq->q->integrity; + + if (!(bi->flags & BLK_INTEGRITY_REF_TAG)) + return; + + if (bi->csum_type == BLK_INTEGRITY_CSUM_CRC64) + ext_pi_type1_complete(rq, nr_bytes); + else + t10_pi_type1_complete(rq, nr_bytes); +} MODULE_DESCRIPTION("T10 Protection Information module"); MODULE_LICENSE("GPL"); diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 1dfc462f29cd..6c013ceb0e5f 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1177,7 +1177,7 @@ static int crypt_integrity_ctr(struct crypt_config *cc, struct dm_target *ti) struct mapped_device *md = dm_table_get_md(ti->table); /* We require an underlying device with non-PI metadata */ - if (!bi || strcmp(bi->profile->name, "nop")) { + if (!bi || bi->csum_type != BLK_INTEGRITY_CSUM_NONE) { ti->error = "Integrity profile not supported."; return -EINVAL; } diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig index b309c8be720f..a3caef75aa0a 100644 --- a/drivers/nvme/host/Kconfig +++ b/drivers/nvme/host/Kconfig @@ -1,7 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only config NVME_CORE tristate - select BLK_DEV_INTEGRITY_T10 if BLK_DEV_INTEGRITY config BLK_DEV_NVME tristate "NVM Express block device" diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index f5d150c62955..14bac248cde4 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1744,17 +1744,16 @@ static bool nvme_init_integrity(struct gendisk *disk, struct nvme_ns_head *head) case NVME_NS_DPS_PI_TYPE3: switch (head->guard_type) { case NVME_NVM_NS_16B_GUARD: - integrity.profile = &t10_pi_type3_crc; + integrity.csum_type = BLK_INTEGRITY_CSUM_CRC; integrity.tag_size = sizeof(u16) + sizeof(u32); integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; break; case NVME_NVM_NS_64B_GUARD: - integrity.profile = &ext_pi_type3_crc64; + integrity.csum_type = BLK_INTEGRITY_CSUM_CRC64; integrity.tag_size = sizeof(u16) + 6; integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; break; default: - integrity.profile = NULL; break; } break; @@ -1762,22 +1761,22 @@ static bool nvme_init_integrity(struct gendisk *disk, struct nvme_ns_head *head) case NVME_NS_DPS_PI_TYPE2: switch (head->guard_type) { case NVME_NVM_NS_16B_GUARD: - integrity.profile = &t10_pi_type1_crc; + integrity.csum_type = BLK_INTEGRITY_CSUM_CRC; integrity.tag_size = sizeof(u16); - integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; + integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE | + BLK_INTEGRITY_REF_TAG; break; case NVME_NVM_NS_64B_GUARD: - integrity.profile = &ext_pi_type1_crc64; + integrity.csum_type = BLK_INTEGRITY_CSUM_CRC64; integrity.tag_size = sizeof(u16); - integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE; + integrity.flags |= BLK_INTEGRITY_DEVICE_CAPABLE | + BLK_INTEGRITY_REF_TAG; break; default: - integrity.profile = NULL; break; } break; default: - integrity.profile = NULL; break; } diff --git a/drivers/nvme/target/Kconfig b/drivers/nvme/target/Kconfig index 872dd1a0acd8..c42aec41cc7b 100644 --- a/drivers/nvme/target/Kconfig +++ b/drivers/nvme/target/Kconfig @@ -6,7 +6,6 @@ config NVME_TARGET depends on CONFIGFS_FS select NVME_KEYRING if NVME_TARGET_TCP_TLS select KEYS if NVME_TARGET_TCP_TLS - select BLK_DEV_INTEGRITY_T10 if BLK_DEV_INTEGRITY select SGL_ALLOC help This enabled target side support for the NVMe protocol, that is diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 6426aac2634a..b628bc5ee998 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -61,15 +61,17 @@ static void nvmet_bdev_ns_enable_integrity(struct nvmet_ns *ns) { struct blk_integrity *bi = bdev_get_integrity(ns->bdev); - if (bi) { + if (!bi) + return; + + if (bi->csum_type == BLK_INTEGRITY_CSUM_CRC) { ns->metadata_size = bi->tuple_size; - if (bi->profile == &t10_pi_type1_crc) + if (bi->flags & BLK_INTEGRITY_REF_TAG) ns->pi_type = NVME_NS_DPS_PI_TYPE1; - else if (bi->profile == &t10_pi_type3_crc) - ns->pi_type = NVME_NS_DPS_PI_TYPE3; else - /* Unsupported metadata type */ - ns->metadata_size = 0; + ns->pi_type = NVME_NS_DPS_PI_TYPE3; + } else { + ns->metadata_size = 0; } } @@ -102,7 +104,7 @@ int nvmet_bdev_ns_enable(struct nvmet_ns *ns) ns->pi_type = 0; ns->metadata_size = 0; - if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY_T10)) + if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY)) nvmet_bdev_ns_enable_integrity(ns); if (bdev_is_zoned(ns->bdev)) { diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 065db86d6021..37c24ffea65c 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -82,7 +82,6 @@ comment "SCSI support type (disk, tape, CD-ROM)" config BLK_DEV_SD tristate "SCSI disk support" depends on SCSI - select BLK_DEV_INTEGRITY_T10 if BLK_DEV_INTEGRITY help If you want to use SCSI hard disks, Fibre Channel disks, Serial ATA (SATA) or Parallel ATA (PATA) hard disks, diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index 1df847b5f747..6f0921c7db78 100644 --- a/drivers/scsi/sd_dif.c +++ b/drivers/scsi/sd_dif.c @@ -47,18 +47,13 @@ void sd_dif_config_host(struct scsi_disk *sdkp) memset(&bi, 0, sizeof(bi)); /* Enable DMA of protection information */ - if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP) { - if (type == T10_PI_TYPE3_PROTECTION) - bi.profile = &t10_pi_type3_ip; - else - bi.profile = &t10_pi_type1_ip; + if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP) + bi.csum_type = BLK_INTEGRITY_CSUM_IP; + else + bi.csum_type = BLK_INTEGRITY_CSUM_CRC; - bi.flags |= BLK_INTEGRITY_IP_CHECKSUM; - } else - if (type == T10_PI_TYPE3_PROTECTION) - bi.profile = &t10_pi_type3_crc; - else - bi.profile = &t10_pi_type1_crc; + if (type != T10_PI_TYPE3_PROTECTION) + bi.flags |= BLK_INTEGRITY_REF_TAG; bi.tuple_size = sizeof(struct t10_pi_tuple); @@ -76,7 +71,7 @@ void sd_dif_config_host(struct scsi_disk *sdkp) sd_first_printk(KERN_NOTICE, sdkp, "Enabling DIX %s, application tag size %u bytes\n", - bi.profile->name, bi.tag_size); + blk_integrity_profile_name(&bi), bi.tag_size); out: blk_integrity_register(disk, &bi); } diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 7f6ca8177845..a3e09adc4e76 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -148,35 +148,38 @@ static int iblock_configure_device(struct se_device *dev) dev->dev_attrib.is_nonrot = 1; bi = bdev_get_integrity(bd); - if (bi) { - struct bio_set *bs = &ib_dev->ibd_bio_set; + if (!bi) + return 0; - if (!strcmp(bi->profile->name, "T10-DIF-TYPE3-IP") || - !strcmp(bi->profile->name, "T10-DIF-TYPE1-IP")) { - pr_err("IBLOCK export of blk_integrity: %s not" - " supported\n", bi->profile->name); - ret = -ENOSYS; - goto out_blkdev_put; - } - - if (!strcmp(bi->profile->name, "T10-DIF-TYPE3-CRC")) { - dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE3_PROT; - } else if (!strcmp(bi->profile->name, "T10-DIF-TYPE1-CRC")) { + switch (bi->csum_type) { + case BLK_INTEGRITY_CSUM_IP: + pr_err("IBLOCK export of blk_integrity: %s not supported\n", + blk_integrity_profile_name(bi)); + ret = -ENOSYS; + goto out_blkdev_put; + case BLK_INTEGRITY_CSUM_CRC: + if (bi->flags & BLK_INTEGRITY_REF_TAG) dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE1_PROT; - } - - if (dev->dev_attrib.pi_prot_type) { - if (bioset_integrity_create(bs, IBLOCK_BIO_POOL_SIZE) < 0) { - pr_err("Unable to allocate bioset for PI\n"); - ret = -ENOMEM; - goto out_blkdev_put; - } - pr_debug("IBLOCK setup BIP bs->bio_integrity_pool: %p\n", - &bs->bio_integrity_pool); - } - dev->dev_attrib.hw_pi_prot_type = dev->dev_attrib.pi_prot_type; + else + dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE3_PROT; + break; + default: + break; } + if (dev->dev_attrib.pi_prot_type) { + struct bio_set *bs = &ib_dev->ibd_bio_set; + + if (bioset_integrity_create(bs, IBLOCK_BIO_POOL_SIZE) < 0) { + pr_err("Unable to allocate bioset for PI\n"); + ret = -ENOMEM; + goto out_blkdev_put; + } + pr_debug("IBLOCK setup BIP bs->bio_integrity_pool: %p\n", + &bs->bio_integrity_pool); + } + + dev->dev_attrib.hw_pi_prot_type = dev->dev_attrib.pi_prot_type; return 0; out_blkdev_put: diff --git a/include/linux/blk-integrity.h b/include/linux/blk-integrity.h index 7428cb43952d..56ce1ae35580 100644 --- a/include/linux/blk-integrity.h +++ b/include/linux/blk-integrity.h @@ -10,7 +10,7 @@ enum blk_integrity_flags { BLK_INTEGRITY_VERIFY = 1 << 0, BLK_INTEGRITY_GENERATE = 1 << 1, BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2, - BLK_INTEGRITY_IP_CHECKSUM = 1 << 3, + BLK_INTEGRITY_REF_TAG = 1 << 3, }; struct blk_integrity_iter { @@ -19,22 +19,10 @@ struct blk_integrity_iter { sector_t seed; unsigned int data_size; unsigned short interval; - unsigned char tuple_size; - unsigned char pi_offset; const char *disk_name; }; -typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *); -typedef void (integrity_prepare_fn) (struct request *); -typedef void (integrity_complete_fn) (struct request *, unsigned int); - -struct blk_integrity_profile { - integrity_processing_fn *generate_fn; - integrity_processing_fn *verify_fn; - integrity_prepare_fn *prepare_fn; - integrity_complete_fn *complete_fn; - const char *name; -}; +const char *blk_integrity_profile_name(struct blk_integrity *bi); #ifdef CONFIG_BLK_DEV_INTEGRITY void blk_integrity_register(struct gendisk *, struct blk_integrity *); @@ -44,14 +32,17 @@ int blk_rq_map_integrity_sg(struct request_queue *, struct bio *, struct scatterlist *); int blk_rq_count_integrity_sg(struct request_queue *, struct bio *); +static inline bool +blk_integrity_queue_supports_integrity(struct request_queue *q) +{ + return q->integrity.tuple_size; +} + static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk) { - struct blk_integrity *bi = &disk->queue->integrity; - - if (!bi->profile) + if (!blk_integrity_queue_supports_integrity(disk->queue)) return NULL; - - return bi; + return &disk->queue->integrity; } static inline struct blk_integrity * @@ -60,12 +51,6 @@ bdev_get_integrity(struct block_device *bdev) return blk_get_integrity(bdev->bd_disk); } -static inline bool -blk_integrity_queue_supports_integrity(struct request_queue *q) -{ - return q->integrity.profile; -} - static inline unsigned short queue_max_integrity_segments(const struct request_queue *q) { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ac8e0cb2353a..bdd33388e1ce 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -105,9 +105,16 @@ enum { struct disk_events; struct badblocks; +enum blk_integrity_checksum { + BLK_INTEGRITY_CSUM_NONE = 0, + BLK_INTEGRITY_CSUM_IP = 1, + BLK_INTEGRITY_CSUM_CRC = 2, + BLK_INTEGRITY_CSUM_CRC64 = 3, +} __packed ; + struct blk_integrity { - const struct blk_integrity_profile *profile; unsigned char flags; + enum blk_integrity_checksum csum_type; unsigned char tuple_size; unsigned char pi_offset; unsigned char interval_exp; diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h index 248f4ac95642..d2bafb76badf 100644 --- a/include/linux/t10-pi.h +++ b/include/linux/t10-pi.h @@ -48,11 +48,6 @@ static inline u32 t10_pi_ref_tag(struct request *rq) return blk_rq_pos(rq) >> (shift - SECTOR_SHIFT) & 0xffffffff; } -extern const struct blk_integrity_profile t10_pi_type1_crc; -extern const struct blk_integrity_profile t10_pi_type1_ip; -extern const struct blk_integrity_profile t10_pi_type3_crc; -extern const struct blk_integrity_profile t10_pi_type3_ip; - struct crc64_pi_tuple { __be64 guard_tag; __be16 app_tag; @@ -79,7 +74,4 @@ static inline u64 ext_pi_ref_tag(struct request *rq) return lower_48_bits(blk_rq_pos(rq) >> (shift - SECTOR_SHIFT)); } -extern const struct blk_integrity_profile ext_pi_type1_crc64; -extern const struct blk_integrity_profile ext_pi_type3_crc64; - #endif