From d57a5f7c6605f15f3b5134837e68b448a7cea88e Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Sat, 23 Nov 2013 17:20:16 -0800 Subject: bio-integrity: Convert to bvec_iter The bio integrity is also stored in a bvec array, so if we use the bvec iter code we just added, the integrity code won't need to implement its own iteration stuff (bio_integrity_mark_head(), bio_integrity_mark_tail()) Signed-off-by: Kent Overstreet Cc: Jens Axboe Cc: "Martin K. Petersen" Cc: "James E.J. Bottomley" --- fs/bio-integrity.c | 108 +++++++++++++---------------------------------------- 1 file changed, 26 insertions(+), 82 deletions(-) (limited to 'fs/bio-integrity.c') diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c index 9127db86f315..fed744b8c9e5 100644 --- a/fs/bio-integrity.c +++ b/fs/bio-integrity.c @@ -134,8 +134,7 @@ int bio_integrity_add_page(struct bio *bio, struct page *page, return 0; } - iv = bip_vec_idx(bip, bip->bip_vcnt); - BUG_ON(iv == NULL); + iv = bip->bip_vec + bip->bip_vcnt; iv->bv_page = page; iv->bv_len = len; @@ -203,6 +202,12 @@ static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi, return sectors; } +static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, + unsigned int sectors) +{ + return bio_integrity_hw_sectors(bi, sectors) * bi->tuple_size; +} + /** * bio_integrity_tag_size - Retrieve integrity tag space * @bio: bio to inspect @@ -235,9 +240,9 @@ int bio_integrity_tag(struct bio *bio, void *tag_buf, unsigned int len, int set) nr_sectors = bio_integrity_hw_sectors(bi, DIV_ROUND_UP(len, bi->tag_size)); - if (nr_sectors * bi->tuple_size > bip->bip_size) { - printk(KERN_ERR "%s: tag too big for bio: %u > %u\n", - __func__, nr_sectors * bi->tuple_size, bip->bip_size); + if (nr_sectors * bi->tuple_size > bip->bip_iter.bi_size) { + printk(KERN_ERR "%s: tag too big for bio: %u > %u\n", __func__, + nr_sectors * bi->tuple_size, bip->bip_iter.bi_size); return -1; } @@ -322,7 +327,7 @@ static void bio_integrity_generate(struct bio *bio) sector += sectors; prot_buf += sectors * bi->tuple_size; total += sectors * bi->tuple_size; - BUG_ON(total > bio->bi_integrity->bip_size); + BUG_ON(total > bio->bi_integrity->bip_iter.bi_size); kunmap_atomic(kaddr); } @@ -387,8 +392,8 @@ int bio_integrity_prep(struct bio *bio) bip->bip_owns_buf = 1; bip->bip_buf = buf; - bip->bip_size = len; - bip->bip_sector = bio->bi_iter.bi_sector; + bip->bip_iter.bi_size = len; + bip->bip_iter.bi_sector = bio->bi_iter.bi_sector; /* Map it */ offset = offset_in_page(buf); @@ -444,7 +449,7 @@ static int bio_integrity_verify(struct bio *bio) struct blk_integrity_exchg bix; struct bio_vec bv; struct bvec_iter iter; - sector_t sector = bio->bi_integrity->bip_sector; + sector_t sector = bio->bi_integrity->bip_iter.bi_sector; unsigned int sectors, total, ret; void *prot_buf = bio->bi_integrity->bip_buf; @@ -470,7 +475,7 @@ static int bio_integrity_verify(struct bio *bio) sector += sectors; prot_buf += sectors * bi->tuple_size; total += sectors * bi->tuple_size; - BUG_ON(total > bio->bi_integrity->bip_size); + BUG_ON(total > bio->bi_integrity->bip_iter.bi_size); kunmap_atomic(kaddr); } @@ -534,56 +539,6 @@ void bio_integrity_endio(struct bio *bio, int error) } EXPORT_SYMBOL(bio_integrity_endio); -/** - * bio_integrity_mark_head - Advance bip_vec skip bytes - * @bip: Integrity vector to advance - * @skip: Number of bytes to advance it - */ -void bio_integrity_mark_head(struct bio_integrity_payload *bip, - unsigned int skip) -{ - struct bio_vec *iv; - unsigned int i; - - bip_for_each_vec(iv, bip, i) { - if (skip == 0) { - bip->bip_idx = i; - return; - } else if (skip >= iv->bv_len) { - skip -= iv->bv_len; - } else { /* skip < iv->bv_len) */ - iv->bv_offset += skip; - iv->bv_len -= skip; - bip->bip_idx = i; - return; - } - } -} - -/** - * bio_integrity_mark_tail - Truncate bip_vec to be len bytes long - * @bip: Integrity vector to truncate - * @len: New length of integrity vector - */ -void bio_integrity_mark_tail(struct bio_integrity_payload *bip, - unsigned int len) -{ - struct bio_vec *iv; - unsigned int i; - - bip_for_each_vec(iv, bip, i) { - if (len == 0) { - bip->bip_vcnt = i; - return; - } else if (len >= iv->bv_len) { - len -= iv->bv_len; - } else { /* len < iv->bv_len) */ - iv->bv_len = len; - len = 0; - } - } -} - /** * bio_integrity_advance - Advance integrity vector * @bio: bio whose integrity vector to update @@ -597,13 +552,9 @@ void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) { struct bio_integrity_payload *bip = bio->bi_integrity; struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); - unsigned int nr_sectors; + unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); - BUG_ON(bip == NULL); - BUG_ON(bi == NULL); - - nr_sectors = bio_integrity_hw_sectors(bi, bytes_done >> 9); - bio_integrity_mark_head(bip, nr_sectors * bi->tuple_size); + bvec_iter_advance(bip->bip_vec, &bip->bip_iter, bytes); } EXPORT_SYMBOL(bio_integrity_advance); @@ -623,16 +574,9 @@ void bio_integrity_trim(struct bio *bio, unsigned int offset, { struct bio_integrity_payload *bip = bio->bi_integrity; struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); - unsigned int nr_sectors; - BUG_ON(bip == NULL); - BUG_ON(bi == NULL); - BUG_ON(!bio_flagged(bio, BIO_CLONED)); - - nr_sectors = bio_integrity_hw_sectors(bi, sectors); - bip->bip_sector = bip->bip_sector + offset; - bio_integrity_mark_head(bip, offset * bi->tuple_size); - bio_integrity_mark_tail(bip, sectors * bi->tuple_size); + bio_integrity_advance(bio, offset << 9); + bip->bip_iter.bi_size = bio_integrity_bytes(bi, sectors); } EXPORT_SYMBOL(bio_integrity_trim); @@ -662,8 +606,8 @@ void bio_integrity_split(struct bio *bio, struct bio_pair *bp, int sectors) bp->bio1.bi_integrity = &bp->bip1; bp->bio2.bi_integrity = &bp->bip2; - bp->iv1 = bip->bip_vec[bip->bip_idx]; - bp->iv2 = bip->bip_vec[bip->bip_idx]; + bp->iv1 = bip->bip_vec[bip->bip_iter.bi_idx]; + bp->iv2 = bip->bip_vec[bip->bip_iter.bi_idx]; bp->bip1.bip_vec = &bp->iv1; bp->bip2.bip_vec = &bp->iv2; @@ -672,11 +616,12 @@ void bio_integrity_split(struct bio *bio, struct bio_pair *bp, int sectors) bp->iv2.bv_offset += sectors * bi->tuple_size; bp->iv2.bv_len -= sectors * bi->tuple_size; - bp->bip1.bip_sector = bio->bi_integrity->bip_sector; - bp->bip2.bip_sector = bio->bi_integrity->bip_sector + nr_sectors; + bp->bip1.bip_iter.bi_sector = bio->bi_integrity->bip_iter.bi_sector; + bp->bip2.bip_iter.bi_sector = + bio->bi_integrity->bip_iter.bi_sector + nr_sectors; bp->bip1.bip_vcnt = bp->bip2.bip_vcnt = 1; - bp->bip1.bip_idx = bp->bip2.bip_idx = 0; + bp->bip1.bip_iter.bi_idx = bp->bip2.bip_iter.bi_idx = 0; } EXPORT_SYMBOL(bio_integrity_split); @@ -704,9 +649,8 @@ int bio_integrity_clone(struct bio *bio, struct bio *bio_src, memcpy(bip->bip_vec, bip_src->bip_vec, bip_src->bip_vcnt * sizeof(struct bio_vec)); - bip->bip_sector = bip_src->bip_sector; bip->bip_vcnt = bip_src->bip_vcnt; - bip->bip_idx = bip_src->bip_idx; + bip->bip_iter = bip_src->bip_iter; return 0; } -- cgit v1.2.3