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da042a3655
Split struct bio_integrity_payload and the related prototypes out of bio.h into a separate bio-integrity.h header so that it is only pulled in by the few places that need it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Anuj Gupta <anuj20.g@samsung.com> Reviewed-by: Kanchan Joshi <joshi.k@samsung.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240702151047.1746127-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_BLK_INTEGRITY_H
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#define _LINUX_BLK_INTEGRITY_H
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#include <linux/blk-mq.h>
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#include <linux/bio-integrity.h>
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struct request;
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enum blk_integrity_flags {
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BLK_INTEGRITY_NOVERIFY = 1 << 0,
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BLK_INTEGRITY_NOGENERATE = 1 << 1,
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BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
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BLK_INTEGRITY_REF_TAG = 1 << 3,
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BLK_INTEGRITY_STACKED = 1 << 4,
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};
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const char *blk_integrity_profile_name(struct blk_integrity *bi);
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bool queue_limits_stack_integrity(struct queue_limits *t,
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struct queue_limits *b);
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static inline bool queue_limits_stack_integrity_bdev(struct queue_limits *t,
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struct block_device *bdev)
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{
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return queue_limits_stack_integrity(t, &bdev->bd_disk->queue->limits);
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}
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#ifdef CONFIG_BLK_DEV_INTEGRITY
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int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
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struct scatterlist *);
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int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
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static inline bool
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blk_integrity_queue_supports_integrity(struct request_queue *q)
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{
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return q->limits.integrity.tuple_size;
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}
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static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
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{
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if (!blk_integrity_queue_supports_integrity(disk->queue))
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return NULL;
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return &disk->queue->limits.integrity;
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}
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static inline struct blk_integrity *
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bdev_get_integrity(struct block_device *bdev)
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{
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return blk_get_integrity(bdev->bd_disk);
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}
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static inline unsigned short
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queue_max_integrity_segments(const struct request_queue *q)
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{
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return q->limits.max_integrity_segments;
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}
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/**
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* bio_integrity_intervals - Return number of integrity intervals for a bio
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* @bi: blk_integrity profile for device
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* @sectors: Size of the bio in 512-byte sectors
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*
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* Description: The block layer calculates everything in 512 byte
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* sectors but integrity metadata is done in terms of the data integrity
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* interval size of the storage device. Convert the block layer sectors
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* to the appropriate number of integrity intervals.
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*/
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static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
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unsigned int sectors)
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{
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return sectors >> (bi->interval_exp - 9);
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}
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static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
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unsigned int sectors)
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{
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return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
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}
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static inline bool blk_integrity_rq(struct request *rq)
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{
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return rq->cmd_flags & REQ_INTEGRITY;
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}
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/*
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* Return the current bvec that contains the integrity data. bip_iter may be
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* advanced to iterate over the integrity data.
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*/
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static inline struct bio_vec rq_integrity_vec(struct request *rq)
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{
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return mp_bvec_iter_bvec(rq->bio->bi_integrity->bip_vec,
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rq->bio->bi_integrity->bip_iter);
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}
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#else /* CONFIG_BLK_DEV_INTEGRITY */
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static inline int blk_rq_count_integrity_sg(struct request_queue *q,
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struct bio *b)
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{
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return 0;
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}
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static inline int blk_rq_map_integrity_sg(struct request_queue *q,
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struct bio *b,
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struct scatterlist *s)
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{
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return 0;
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}
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static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
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{
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return NULL;
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}
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static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
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{
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return NULL;
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}
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static inline bool
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blk_integrity_queue_supports_integrity(struct request_queue *q)
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{
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return false;
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}
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static inline unsigned short
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queue_max_integrity_segments(const struct request_queue *q)
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{
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return 0;
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}
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static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
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unsigned int sectors)
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{
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return 0;
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}
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static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
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unsigned int sectors)
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{
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return 0;
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}
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static inline int blk_integrity_rq(struct request *rq)
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{
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return 0;
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}
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static inline struct bio_vec rq_integrity_vec(struct request *rq)
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{
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/* the optimizer will remove all calls to this function */
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return (struct bio_vec){ };
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}
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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#endif /* _LINUX_BLK_INTEGRITY_H */
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