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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_BIO_INTEGRITY_H#define _LINUX_BIO_INTEGRITY_H
#include <linux/bio.h>
enum bip_flags { BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */ BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */ BIP_DISK_NOCHECK = 1 << 2, /* disable disk integrity checking */ BIP_IP_CHECKSUM = 1 << 3, /* IP checksum */ BIP_COPY_USER = 1 << 4, /* Kernel bounce buffer in use */ BIP_CHECK_GUARD = 1 << 5, /* guard check */ BIP_CHECK_REFTAG = 1 << 6, /* reftag check */ BIP_CHECK_APPTAG = 1 << 7, /* apptag check */
BIP_MEMPOOL = 1 << 15, /* buffer backed by mempool */};
struct bio_integrity_payload { struct bvec_iter bip_iter;
unsigned short bip_vcnt; /* # of integrity bio_vecs */ unsigned short bip_max_vcnt; /* integrity bio_vec slots */ unsigned short bip_flags; /* control flags */ u16 app_tag; /* application tag value */
struct bio_vec *bip_vec;};
#define BIP_CLONE_FLAGS (BIP_MAPPED_INTEGRITY | BIP_IP_CHECKSUM | \ BIP_CHECK_GUARD | BIP_CHECK_REFTAG | BIP_CHECK_APPTAG)
#ifdef CONFIG_BLK_DEV_INTEGRITY
#define bip_for_each_vec(bvl, bip, iter) \ for_each_bvec(bvl, (bip)->bip_vec, iter, (bip)->bip_iter)
#define bio_for_each_integrity_vec(_bvl, _bio, _iter) \ for_each_bio(_bio) \ bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
static inline struct bio_integrity_payload *bio_integrity(struct bio *bio){ if (bio->bi_opf & REQ_INTEGRITY) return bio->bi_integrity;
return NULL;}
static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag){ struct bio_integrity_payload *bip = bio_integrity(bio);
if (bip) return bip->bip_flags & flag;
return false;}
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;}
void bio_integrity_init(struct bio *bio, struct bio_integrity_payload *bip, struct bio_vec *bvecs, unsigned int nr_vecs);struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp, unsigned int nr);int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int offset);int bio_integrity_map_user(struct bio *bio, struct iov_iter *iter);int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta);void bio_integrity_unmap_user(struct bio *bio);void bio_integrity_prep(struct bio *bio, unsigned int action);void bio_integrity_advance(struct bio *bio, unsigned int bytes_done);void bio_integrity_trim(struct bio *bio);int bio_integrity_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp_mask);
#else /* CONFIG_BLK_DEV_INTEGRITY */
static inline struct bio_integrity_payload *bio_integrity(struct bio *bio){ return NULL;}
static inline int bio_integrity_map_user(struct bio *bio, struct iov_iter *iter){ return -EINVAL;}
static inline int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta){ return -EINVAL;}
static inline void bio_integrity_unmap_user(struct bio *bio){}
static inline void bio_integrity_prep(struct bio *bio, unsigned int action){}
static inline int bio_integrity_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp_mask){ return 0;}
static inline void bio_integrity_advance(struct bio *bio, unsigned int bytes_done){}
static inline void bio_integrity_trim(struct bio *bio){}
static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag){ return false;}
static inline struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp, unsigned int nr){ return ERR_PTR(-EINVAL);}
static inline int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int offset){ return 0;}#endif /* CONFIG_BLK_DEV_INTEGRITY */
void bio_integrity_alloc_buf(struct bio *bio, gfp_t gfp, bool zero_buffer);void bio_integrity_free_buf(struct bio_integrity_payload *bip);void bio_integrity_setup_default(struct bio *bio);
unsigned int fs_bio_integrity_alloc(struct bio *bio);void fs_bio_integrity_free(struct bio *bio);void fs_bio_integrity_generate(struct bio *bio);int fs_bio_integrity_verify(struct bio *bio, sector_t sector, unsigned int size);
#endif /* _LINUX_BIO_INTEGRITY_H */