From 1859308853b19c4daf4afaab910d3d52ac1ec2ff Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 26 Sep 2014 19:20:01 -0400 Subject: block: Clean up the code used to generate and verify integrity metadata Instead of the "operate" parameter we pass in a seed value and a pointer to a function that can be used to process the integrity metadata. The generation function is changed to have a return value to fit into this scheme. Signed-off-by: Martin K. Petersen Reviewed-by: Sagi Grimberg Signed-off-by: Jens Axboe --- drivers/scsi/sd_dif.c | 106 ++++++++++++++++++++++++++------------------------ 1 file changed, 56 insertions(+), 50 deletions(-) (limited to 'drivers/scsi/sd_dif.c') diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c index 1600270a46e5..801c41851a01 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; -- cgit v1.2.3