[PATCH 12/24] block: add a queue_max_sectors_bytes helper
From: Christoph Hellwig <hch@lst.de>
Date: 2021-07-24 07:25:09
Also in:
linux-scsi
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Return the max_sectors value in bytes. Lifted from scsi_ioctl.c. Signed-off-by: Christoph Hellwig <hch@lst.de> --- block/scsi_ioctl.c | 13 ++----------- include/linux/blkdev.h | 5 +++++ 2 files changed, 7 insertions(+), 11 deletions(-)
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index ca7b84452d9d..c3871529e283 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c@@ -68,18 +68,9 @@ static int sg_set_timeout(struct request_queue *q, int __user *p) return err; } -static int max_sectors_bytes(struct request_queue *q) -{ - unsigned int max_sectors = queue_max_sectors(q); - - max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9); - - return max_sectors << 9; -} - static int sg_get_reserved_size(struct request_queue *q, int __user *p) { - int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q)); + int val = min(q->sg_reserved_size, queue_max_bytes(q)); return put_user(val, p); }
@@ -94,7 +85,7 @@ static int sg_set_reserved_size(struct request_queue *q, int __user *p) if (size < 0) return -EINVAL; - q->sg_reserved_size = min(size, max_sectors_bytes(q)); + q->sg_reserved_size = min_t(unsigned int, size, queue_max_bytes(q)); return 0; }
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e2b972a85012..9971796819ef 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h@@ -1373,6 +1373,11 @@ static inline unsigned int queue_max_sectors(const struct request_queue *q) return q->limits.max_sectors; } +static inline unsigned int queue_max_bytes(struct request_queue *q) +{ + return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9; +} + static inline unsigned int queue_max_hw_sectors(const struct request_queue *q) { return q->limits.max_hw_sectors;
--
2.30.2