diff options
| author | Christoph Hellwig <[email protected]> | 2022-04-15 06:52:54 +0200 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2022-04-17 19:49:59 -0600 |
| commit | cf0fbf894bb543f472f682c486be48298eccf199 (patch) | |
| tree | 94e16623288183a37b3448976a706a3e9e5aec74 /include/linux | |
| parent | e3cc28ea28b5f8794db2aed24f8a0282ad2e85a2 (diff) | |
block: add a bdev_max_discard_sectors helper
Add a helper to query the number of sectors support per each discard bio
based on the block device and use this helper to stop various places from
poking into the request_queue to see if discard is supported and if so how
much. This mirrors what is done e.g. for write zeroes as well.
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Acked-by: Christoph Böhmwalder <[email protected]> [drbd]
Acked-by: Coly Li <[email protected]> [bcache]
Acked-by: David Sterba <[email protected]> [btrfs]
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blkdev.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 34b1cfd06742..ce16247d3afa 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1254,6 +1254,11 @@ bdev_zone_write_granularity(struct block_device *bdev) int bdev_alignment_offset(struct block_device *bdev); unsigned int bdev_discard_alignment(struct block_device *bdev); +static inline unsigned int bdev_max_discard_sectors(struct block_device *bdev) +{ + return bdev_get_queue(bdev)->limits.max_discard_sectors; +} + static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev) { struct request_queue *q = bdev_get_queue(bdev); |