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scsi: block: Add a queue_max_bytes() helper
Return the max_sectors value in bytes. Lifted from scsi_ioctl.c. Link: https://lore.kernel.org/r/20210724072033.1284840-13-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -68,18 +68,9 @@ static int sg_set_timeout(struct request_queue *q, int __user *p)
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return err;
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}
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static int max_sectors_bytes(struct request_queue *q)
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{
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unsigned int max_sectors = queue_max_sectors(q);
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max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9);
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return max_sectors << 9;
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}
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static int sg_get_reserved_size(struct request_queue *q, int __user *p)
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{
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int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q));
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int val = min(q->sg_reserved_size, queue_max_bytes(q));
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return put_user(val, p);
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}
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@ -94,7 +85,7 @@ static int sg_set_reserved_size(struct request_queue *q, int __user *p)
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if (size < 0)
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return -EINVAL;
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q->sg_reserved_size = min(size, max_sectors_bytes(q));
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q->sg_reserved_size = min_t(unsigned int, size, queue_max_bytes(q));
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return 0;
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}
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@ -1373,6 +1373,11 @@ static inline unsigned int queue_max_sectors(const struct request_queue *q)
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return q->limits.max_sectors;
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}
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static inline unsigned int queue_max_bytes(struct request_queue *q)
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{
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return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9;
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}
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static inline unsigned int queue_max_hw_sectors(const struct request_queue *q)
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{
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return q->limits.max_hw_sectors;
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