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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _LINUX_BLK_INTEGRITY_H3#define _LINUX_BLK_INTEGRITY_H4 5#include <linux/blk-mq.h>6#include <linux/bio-integrity.h>7 8struct request;9 10enum blk_integrity_flags {11 BLK_INTEGRITY_NOVERIFY = 1 << 0,12 BLK_INTEGRITY_NOGENERATE = 1 << 1,13 BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,14 BLK_INTEGRITY_REF_TAG = 1 << 3,15 BLK_INTEGRITY_STACKED = 1 << 4,16};17 18const char *blk_integrity_profile_name(struct blk_integrity *bi);19bool queue_limits_stack_integrity(struct queue_limits *t,20 struct queue_limits *b);21static inline bool queue_limits_stack_integrity_bdev(struct queue_limits *t,22 struct block_device *bdev)23{24 return queue_limits_stack_integrity(t, &bdev->bd_disk->queue->limits);25}26 27#ifdef CONFIG_BLK_DEV_INTEGRITY28int blk_rq_map_integrity_sg(struct request *, struct scatterlist *);29int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);30int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf,31 ssize_t bytes, u32 seed);32 33static inline bool34blk_integrity_queue_supports_integrity(struct request_queue *q)35{36 return q->limits.integrity.tuple_size;37}38 39static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)40{41 if (!blk_integrity_queue_supports_integrity(disk->queue))42 return NULL;43 return &disk->queue->limits.integrity;44}45 46static inline struct blk_integrity *47bdev_get_integrity(struct block_device *bdev)48{49 return blk_get_integrity(bdev->bd_disk);50}51 52static inline unsigned short53queue_max_integrity_segments(const struct request_queue *q)54{55 return q->limits.max_integrity_segments;56}57 58/**59 * bio_integrity_intervals - Return number of integrity intervals for a bio60 * @bi: blk_integrity profile for device61 * @sectors: Size of the bio in 512-byte sectors62 *63 * Description: The block layer calculates everything in 512 byte64 * sectors but integrity metadata is done in terms of the data integrity65 * interval size of the storage device. Convert the block layer sectors66 * to the appropriate number of integrity intervals.67 */68static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,69 unsigned int sectors)70{71 return sectors >> (bi->interval_exp - 9);72}73 74static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,75 unsigned int sectors)76{77 return bio_integrity_intervals(bi, sectors) * bi->tuple_size;78}79 80static inline bool blk_integrity_rq(struct request *rq)81{82 return rq->cmd_flags & REQ_INTEGRITY;83}84 85/*86 * Return the current bvec that contains the integrity data. bip_iter may be87 * advanced to iterate over the integrity data.88 */89static inline struct bio_vec rq_integrity_vec(struct request *rq)90{91 return mp_bvec_iter_bvec(rq->bio->bi_integrity->bip_vec,92 rq->bio->bi_integrity->bip_iter);93}94#else /* CONFIG_BLK_DEV_INTEGRITY */95static inline int blk_rq_count_integrity_sg(struct request_queue *q,96 struct bio *b)97{98 return 0;99}100static inline int blk_rq_map_integrity_sg(struct request *q,101 struct scatterlist *s)102{103 return 0;104}105static inline int blk_rq_integrity_map_user(struct request *rq,106 void __user *ubuf,107 ssize_t bytes,108 u32 seed)109{110 return -EINVAL;111}112static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)113{114 return NULL;115}116static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)117{118 return NULL;119}120static inline bool121blk_integrity_queue_supports_integrity(struct request_queue *q)122{123 return false;124}125static inline unsigned short126queue_max_integrity_segments(const struct request_queue *q)127{128 return 0;129}130 131static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,132 unsigned int sectors)133{134 return 0;135}136 137static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,138 unsigned int sectors)139{140 return 0;141}142static inline int blk_integrity_rq(struct request *rq)143{144 return 0;145}146 147static inline struct bio_vec rq_integrity_vec(struct request *rq)148{149 /* the optimizer will remove all calls to this function */150 return (struct bio_vec){ };151}152#endif /* CONFIG_BLK_DEV_INTEGRITY */153 154#endif /* _LINUX_BLK_INTEGRITY_H */155