diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d463b9b5a0a5..11857ae13d10 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1477,14 +1477,18 @@ static inline bool bdev_synchronous(struct block_device *bdev) return bdev->bd_disk->queue->limits.features & BLK_FEAT_SYNCHRONOUS; } -static inline bool bdev_stable_writes(struct block_device *bdev) +static inline bool bdev_has_integrity_csum(struct block_device *bdev) { - struct request_queue *q = bdev_get_queue(bdev); + struct queue_limits *lim = bdev_limits(bdev); - if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && - q->limits.integrity.csum_type != BLK_INTEGRITY_CSUM_NONE) - return true; - return q->limits.features & BLK_FEAT_STABLE_WRITES; + return IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY) && + lim->integrity.csum_type != BLK_INTEGRITY_CSUM_NONE; +} + +static inline bool bdev_stable_writes(struct block_device *bdev) +{ + return bdev_has_integrity_csum(bdev) || + (bdev_limits(bdev)->features & BLK_FEAT_STABLE_WRITES); } static inline bool blk_queue_write_cache(struct request_queue *q) @@ -1877,6 +1881,24 @@ static inline int bio_split_rw_at(struct bio *bio, return bio_split_io_at(bio, lim, segs, max_bytes, lim->dma_alignment); } +/* + * Maximum contiguous integrity buffer allocation. + */ +#define BLK_INTEGRITY_MAX_SIZE SZ_2M + +/* + * Maximum size of I/O that needs a block layer integrity buffer. Limited + * by the number of intervals for which we can fit the integrity buffer into + * the buffer size. Because the buffer is a single segment it is also limited + * by the maximum segment size. + */ +static inline unsigned int max_integrity_io_size(struct queue_limits *lim) +{ + return min_t(unsigned int, lim->max_segment_size, + (BLK_INTEGRITY_MAX_SIZE / lim->integrity.metadata_size) << + lim->integrity.interval_exp); +} + #define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { } #endif /* _LINUX_BLKDEV_H */ |