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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_BIO_INTEGRITY_H3#define _LINUX_BIO_INTEGRITY_H4 5#include <linux/bio.h>6 7enum bip_flags {8 BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */9 BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */10 BIP_CTRL_NOCHECK = 1 << 2, /* disable HBA integrity checking */11 BIP_DISK_NOCHECK = 1 << 3, /* disable disk integrity checking */12 BIP_IP_CHECKSUM = 1 << 4, /* IP checksum */13 BIP_COPY_USER = 1 << 5, /* Kernel bounce buffer in use */14};15 16struct bio_integrity_payload {17 struct bio *bip_bio; /* parent bio */18 19 struct bvec_iter bip_iter;20 21 unsigned short bip_vcnt; /* # of integrity bio_vecs */22 unsigned short bip_max_vcnt; /* integrity bio_vec slots */23 unsigned short bip_flags; /* control flags */24 25 struct bvec_iter bio_iter; /* for rewinding parent bio */26 27 struct work_struct bip_work; /* I/O completion */28 29 struct bio_vec *bip_vec;30 struct bio_vec bip_inline_vecs[];/* embedded bvec array */31};32 33#ifdef CONFIG_BLK_DEV_INTEGRITY34 35#define bip_for_each_vec(bvl, bip, iter) \36 for_each_bvec(bvl, (bip)->bip_vec, iter, (bip)->bip_iter)37 38#define bio_for_each_integrity_vec(_bvl, _bio, _iter) \39 for_each_bio(_bio) \40 bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)41 42static inline struct bio_integrity_payload *bio_integrity(struct bio *bio)43{44 if (bio->bi_opf & REQ_INTEGRITY)45 return bio->bi_integrity;46 47 return NULL;48}49 50static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)51{52 struct bio_integrity_payload *bip = bio_integrity(bio);53 54 if (bip)55 return bip->bip_flags & flag;56 57 return false;58}59 60static inline sector_t bip_get_seed(struct bio_integrity_payload *bip)61{62 return bip->bip_iter.bi_sector;63}64 65static inline void bip_set_seed(struct bio_integrity_payload *bip,66 sector_t seed)67{68 bip->bip_iter.bi_sector = seed;69}70 71struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp,72 unsigned int nr);73int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len,74 unsigned int offset);75int bio_integrity_map_user(struct bio *bio, void __user *ubuf, ssize_t len, u32 seed);76void bio_integrity_unmap_user(struct bio *bio);77bool bio_integrity_prep(struct bio *bio);78void bio_integrity_advance(struct bio *bio, unsigned int bytes_done);79void bio_integrity_trim(struct bio *bio);80int bio_integrity_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp_mask);81int bioset_integrity_create(struct bio_set *bs, int pool_size);82void bioset_integrity_free(struct bio_set *bs);83void bio_integrity_init(void);84 85#else /* CONFIG_BLK_DEV_INTEGRITY */86 87static inline struct bio_integrity_payload *bio_integrity(struct bio *bio)88{89 return NULL;90}91 92static inline int bioset_integrity_create(struct bio_set *bs, int pool_size)93{94 return 0;95}96 97static inline void bioset_integrity_free(struct bio_set *bs)98{99}100 101static inline int bio_integrity_map_user(struct bio *bio, void __user *ubuf,102 ssize_t len, u32 seed)103{104 return -EINVAL;105}106 107static inline void bio_integrity_unmap_user(struct bio *bio)108{109}110 111static inline bool bio_integrity_prep(struct bio *bio)112{113 return true;114}115 116static inline int bio_integrity_clone(struct bio *bio, struct bio *bio_src,117 gfp_t gfp_mask)118{119 return 0;120}121 122static inline void bio_integrity_advance(struct bio *bio,123 unsigned int bytes_done)124{125}126 127static inline void bio_integrity_trim(struct bio *bio)128{129}130 131static inline void bio_integrity_init(void)132{133}134 135static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)136{137 return false;138}139 140static inline struct bio_integrity_payload *141bio_integrity_alloc(struct bio *bio, gfp_t gfp, unsigned int nr)142{143 return ERR_PTR(-EINVAL);144}145 146static inline int bio_integrity_add_page(struct bio *bio, struct page *page,147 unsigned int len, unsigned int offset)148{149 return 0;150}151#endif /* CONFIG_BLK_DEV_INTEGRITY */152#endif /* _LINUX_BIO_INTEGRITY_H */153