diff options
| -rw-r--r-- | block/bio-integrity.c | 82 | ||||
| -rw-r--r-- | drivers/scsi/sd_dif.c | 106 | ||||
| -rw-r--r-- | include/linux/bio.h | 12 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 9 |
4 files changed, 94 insertions, 115 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c index cf40837e..fe4de03 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -207,49 +207,37 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, } /** - * bio_integrity_generate_verify - Generate/verify integrity metadata for a bio + * bio_integrity_process - Process integrity metadata for a bio * @bio: bio to generate/verify integrity metadata for - * @operate: operate number, 1 for generate, 0 for verify + * @proc_fn: Pointer to the relevant processing function */ -static int bio_integrity_generate_verify(struct bio *bio, int operate) +static int bio_integrity_process(struct bio *bio, + integrity_processing_fn *proc_fn) { struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); - struct blk_integrity_exchg bix; + struct blk_integrity_iter iter; struct bio_vec *bv; struct bio_integrity_payload *bip = bio_integrity(bio); - sector_t seed; - unsigned int intervals, ret = 0, i; + unsigned int i, ret = 0; void *prot_buf = page_address(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset; - if (operate) - seed = bio->bi_iter.bi_sector; - else - seed = bip->bip_iter.bi_sector; - - bix.disk_name = bio->bi_bdev->bd_disk->disk_name; - bix.interval = bi->interval; + iter.disk_name = bio->bi_bdev->bd_disk->disk_name; + iter.interval = bi->interval; + iter.seed = bip_get_seed(bip); + iter.prot_buf = prot_buf; bio_for_each_segment_all(bv, bio, i) { void *kaddr = kmap_atomic(bv->bv_page); - bix.data_buf = kaddr + bv->bv_offset; - bix.data_size = bv->bv_len; - bix.prot_buf = prot_buf; - bix.seed = seed; - - if (operate) - bi->generate_fn(&bix); - else { - ret = bi->verify_fn(&bix); - if (ret) { - kunmap_atomic(kaddr); - return ret; - } - } - intervals = bv->bv_len / bi->interval; - seed += intervals; - prot_buf += intervals * bi->tuple_size; + iter.data_buf = kaddr + bv->bv_offset; + iter.data_size = bv->bv_len; + + ret = proc_fn(&iter); + if (ret) { + kunmap_atomic(kaddr); + return ret; + } kunmap_atomic(kaddr); } @@ -257,20 +245,6 @@ static int bio_integrity_generate_verify(struct bio *bio, int operate) } /** - * bio_integrity_generate - Generate integrity metadata for a bio - * @bio: bio to generate integrity metadata for - * - * Description: Generates integrity metadata for a bio by calling the - * block device's generation callback function. The bio must have a - * bip attached with enough room to accommodate the generated - * integrity metadata. - */ -static void bio_integrity_generate(struct bio *bio) -{ - bio_integrity_generate_verify(bio, 1); -} - -/** * bio_integrity_prep - Prepare bio for integrity I/O * @bio: bio to prepare * @@ -321,7 +295,7 @@ int bio_integrity_prep(struct bio *bio) bip->bip_owns_buf = 1; bip->bip_iter.bi_size = len; - bip->bip_iter.bi_sector = bio->bi_iter.bi_sector; + bip_set_seed(bip, bio->bi_iter.bi_sector); /* Map it */ offset = offset_in_page(buf); @@ -357,26 +331,13 @@ int bio_integrity_prep(struct bio *bio) /* Auto-generate integrity metadata if this is a write */ if (bio_data_dir(bio) == WRITE) - bio_integrity_generate(bio); + bio_integrity_process(bio, bi->generate_fn); return 0; } EXPORT_SYMBOL(bio_integrity_prep); /** - * bio_integrity_verify - Verify integrity metadata for a bio - * @bio: bio to verify - * - * Description: This function is called to verify the integrity of a - * bio. The data in the bio io_vec is compared to the integrity - * metadata returned by the HBA. - */ -static int bio_integrity_verify(struct bio *bio) -{ - return bio_integrity_generate_verify(bio, 0); -} - -/** * bio_integrity_verify_fn - Integrity I/O completion worker * @work: Work struct stored in bio to be verified * @@ -389,9 +350,10 @@ 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 = bdev_get_integrity(bio->bi_bdev); int error; - error = bio_integrity_verify(bio); + error = bio_integrity_process(bio, bi->verify_fn); /* Restore original bio completion handler */ bio->bi_end_io = bip->bip_end_io; diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index 1600270..801c418 100644 --- a/drivers/scsi/sd_dif.c +++ b/drivers/scsi/sd_dif.c @@ -53,42 +53,44 @@ static __u16 sd_dif_ip_fn(void *data, unsigned int len) * Type 1 and Type 2 protection use the same format: 16 bit guard tag, * 16 bit app tag, 32 bit reference tag. */ -static void sd_dif_type1_generate(struct blk_integrity_exchg *bix, csum_fn *fn) +static void sd_dif_type1_generate(struct blk_integrity_iter *iter, csum_fn *fn) { - void *buf = bix->data_buf; - struct sd_dif_tuple *sdt = bix->prot_buf; - sector_t seed = bix->seed; + void *buf = iter->data_buf; + struct sd_dif_tuple *sdt = iter->prot_buf; + sector_t seed = iter->seed; unsigned int i; - for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) { - sdt->guard_tag = fn(buf, bix->interval); + for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) { + sdt->guard_tag = fn(buf, iter->interval); sdt->ref_tag = cpu_to_be32(seed & 0xffffffff); sdt->app_tag = 0; - buf += bix->interval; + buf += iter->interval; seed++; } } -static void sd_dif_type1_generate_crc(struct blk_integrity_exchg *bix) +static int sd_dif_type1_generate_crc(struct blk_integrity_iter *iter) { - sd_dif_type1_generate(bix, sd_dif_crc_fn); + sd_dif_type1_generate(iter, sd_dif_crc_fn); + return 0; } -static void sd_dif_type1_generate_ip(struct blk_integrity_exchg *bix) +static int sd_dif_type1_generate_ip(struct blk_integrity_iter *iter) { - sd_dif_type1_generate(bix, sd_dif_ip_fn); + sd_dif_type1_generate(iter, sd_dif_ip_fn); + return 0; } -static int sd_dif_type1_verify(struct blk_integrity_exchg *bix, csum_fn *fn) +static int sd_dif_type1_verify(struct blk_integrity_iter *iter, csum_fn *fn) { - void *buf = bix->data_buf; - struct sd_dif_tuple *sdt = bix->prot_buf; - sector_t seed = bix->seed; + void *buf = iter->data_buf; + struct sd_dif_tuple *sdt = iter->prot_buf; + sector_t seed = iter->seed; unsigned int i; __u16 csum; - for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) { + for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) { /* Unwritten sectors */ if (sdt->app_tag == 0xffff) return 0; @@ -96,36 +98,36 @@ static int sd_dif_type1_verify(struct blk_integrity_exchg *bix, csum_fn *fn) if (be32_to_cpu(sdt->ref_tag) != (seed & 0xffffffff)) { printk(KERN_ERR "%s: ref tag error on sector %lu (rcvd %u)\n", - bix->disk_name, (unsigned long)seed, + iter->disk_name, (unsigned long)seed, be32_to_cpu(sdt->ref_tag)); return -EIO; } - csum = fn(buf, bix->interval); + csum = fn(buf, iter->interval); if (sdt->guard_tag != csum) { printk(KERN_ERR "%s: guard tag error on sector %lu " \ - "(rcvd %04x, data %04x)\n", bix->disk_name, + "(rcvd %04x, data %04x)\n", iter->disk_name, (unsigned long)seed, be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); return -EIO; } - buf += bix->interval; + buf += iter->interval; seed++; } return 0; } -static int sd_dif_type1_verify_crc(struct blk_integrity_exchg *bix) +static int sd_dif_type1_verify_crc(struct blk_integrity_iter *iter) { - return sd_dif_type1_verify(bix, sd_dif_crc_fn); + return sd_dif_type1_verify(iter, sd_dif_crc_fn); } -static int sd_dif_type1_verify_ip(struct blk_integrity_exchg *bix) +static int sd_dif_type1_verify_ip(struct blk_integrity_iter *iter) { - return sd_dif_type1_verify(bix, sd_dif_ip_fn); + return sd_dif_type1_verify(iter, sd_dif_ip_fn); } static struct blk_integrity dif_type1_integrity_crc = { @@ -149,69 +151,71 @@ static struct blk_integrity dif_type1_integrity_ip = { * Type 3 protection has a 16-bit guard tag and 16 + 32 bits of opaque * tag space. */ -static void sd_dif_type3_generate(struct blk_integrity_exchg *bix, csum_fn *fn) +static void sd_dif_type3_generate(struct blk_integrity_iter *iter, csum_fn *fn) { - void *buf = bix->data_buf; - struct sd_dif_tuple *sdt = bix->prot_buf; + void *buf = iter->data_buf; + struct sd_dif_tuple *sdt = iter->prot_buf; unsigned int i; - for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) { - sdt->guard_tag = fn(buf, bix->interval); + for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) { + sdt->guard_tag = fn(buf, iter->interval); sdt->ref_tag = 0; sdt->app_tag = 0; - buf += bix->interval; + buf += iter->interval; } } -static void sd_dif_type3_generate_crc(struct blk_integrity_exchg *bix) +static int sd_dif_type3_generate_crc(struct blk_integrity_iter *iter) { - sd_dif_type3_generate(bix, sd_dif_crc_fn); + sd_dif_type3_generate(iter, sd_dif_crc_fn); + return 0; } -static void sd_dif_type3_generate_ip(struct blk_integrity_exchg *bix) +static int sd_dif_type3_generate_ip(struct blk_integrity_iter *iter) { - sd_dif_type3_generate(bix, sd_dif_ip_fn); + sd_dif_type3_generate(iter, sd_dif_ip_fn); + return 0; } -static int sd_dif_type3_verify(struct blk_integrity_exchg *bix, csum_fn *fn) +static int sd_dif_type3_verify(struct blk_integrity_iter *iter, csum_fn *fn) { - void *buf = bix->data_buf; - struct sd_dif_tuple *sdt = bix->prot_buf; - sector_t seed = bix->seed; + void *buf = iter->data_buf; + struct sd_dif_tuple *sdt = iter->prot_buf; + sector_t seed = iter->seed; unsigned int i; __u16 csum; - for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) { + for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) { /* Unwritten sectors */ if (sdt->app_tag == 0xffff && sdt->ref_tag == 0xffffffff) return 0; - csum = fn(buf, bix->interval); + csum = fn(buf, iter->interval); if (sdt->guard_tag != csum) { printk(KERN_ERR "%s: guard tag error on sector %lu " \ - "(rcvd %04x, data %04x)\n", bix->disk_name, + "(rcvd %04x, data %04x)\n", iter->disk_name, (unsigned long)seed, be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); return -EIO; } - buf += bix->interval; + buf += iter->interval; seed++; } return 0; } -static int sd_dif_type3_verify_crc(struct blk_integrity_exchg *bix) +static int sd_dif_type3_verify_crc(struct blk_integrity_iter *iter) { - return sd_dif_type3_verify(bix, sd_dif_crc_fn); + return sd_dif_type3_verify(iter, sd_dif_crc_fn); } -static int sd_dif_type3_verify_ip(struct blk_integrity_exchg *bix) +static int sd_dif_type3_verify_ip(struct blk_integrity_iter *iter) { - return sd_dif_type3_verify(bix, sd_dif_ip_fn); + return sd_dif_type3_verify(iter, sd_dif_ip_fn); } static struct blk_integrity dif_type3_integrity_crc = { @@ -310,6 +314,7 @@ void sd_dif_prepare(struct request *rq, sector_t hw_sector, phys = hw_sector & 0xffffffff; __rq_for_each_bio(bio, rq) { + struct bio_integrity_payload *bip = bio_integrity(bio); struct bio_vec iv; struct bvec_iter iter; unsigned int j; @@ -318,9 +323,9 @@ void sd_dif_prepare(struct request *rq, sector_t hw_sector, if (bio_flagged(bio, BIO_MAPPED_INTEGRITY)) break; - virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff; + virt = bip_get_seed(bip) & 0xffffffff; - bip_for_each_vec(iv, bio_integrity(bio), iter) { + bip_for_each_vec(iv, bip, iter) { sdt = kmap_atomic(iv.bv_page) + iv.bv_offset; @@ -366,12 +371,13 @@ void sd_dif_complete(struct scsi_cmnd *scmd, unsigned int good_bytes) phys >>= 3; __rq_for_each_bio(bio, scmd->request) { + struct bio_integrity_payload *bip = bio_integrity(bio); struct bio_vec iv; struct bvec_iter iter; - virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff; + virt = bip_get_seed(bip) & 0xffffffff; - bip_for_each_vec(iv, bio_integrity(bio), iter) { + bip_for_each_vec(iv, bip, iter) { sdt = kmap_atomic(iv.bv_page) + iv.bv_offset; diff --git a/include/linux/bio.h b/include/linux/bio.h index 448d8c0..3fd3666 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -322,6 +322,18 @@ struct bio_integrity_payload { struct bio_vec *bip_vec; struct bio_vec bip_inline_vecs[0];/* embedded bvec array */ }; + +static inline sector_t bip_get_seed(struct bio_integrity_payload *bip) +{ + return bip->bip_iter.bi_sector; +} + +static inline void bip_set_seed(struct bio_integrity_payload *bip, + sector_t seed) +{ + bip->bip_iter.bi_sector = seed; +} + #endif /* CONFIG_BLK_DEV_INTEGRITY */ extern void bio_trim(struct bio *bio, int offset, int size); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d364c42..24c1e05 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1461,7 +1461,7 @@ static inline uint64_t rq_io_start_time_ns(struct request *req) #define INTEGRITY_FLAG_READ 2 /* verify data integrity on read */ #define INTEGRITY_FLAG_WRITE 4 /* generate data integrity on write */ -struct blk_integrity_exchg { +struct blk_integrity_iter { void *prot_buf; void *data_buf; sector_t seed; @@ -1470,12 +1470,11 @@ struct blk_integrity_exchg { const char *disk_name; }; -typedef void (integrity_gen_fn) (struct blk_integrity_exchg *); -typedef int (integrity_vrfy_fn) (struct blk_integrity_exchg *); +typedef int (integrity_processing_fn) (struct blk_integrity_iter *); struct blk_integrity { - integrity_gen_fn *generate_fn; - integrity_vrfy_fn *verify_fn; + integrity_processing_fn *generate_fn; + integrity_processing_fn *verify_fn; unsigned short flags; unsigned short tuple_size; |
