From: Christoph Hellwig <hch@lst.de>
To: "Martin K. Petersen" <martin.petersen@oracle.com>,
Jens Axboe <axboe@kernel.dk>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: "Doug Gilbert" <dgilbert@interlog.com>,
"Kai Mäkisara" <Kai.Makisara@kolumbus.fi>,
linux-block@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: [PATCH 12/24] block: add a queue_max_sectors_bytes helper
Date: Mon, 12 Jul 2021 07:48:04 +0200 [thread overview]
Message-ID: <20210712054816.4147559-13-hch@lst.de> (raw)
In-Reply-To: <20210712054816.4147559-1-hch@lst.de>
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..b46a04a40db4 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_t(int, q->sg_reserved_size, queue_max_sectors_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(size, queue_max_sectors_bytes(q));
return 0;
}
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e2b972a85012..c983cd8ecf98 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 int queue_max_sectors_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
next prev parent reply other threads:[~2021-07-12 5:54 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 5:47 cleanup SCSI ioctl support Christoph Hellwig
2021-07-12 5:47 ` [PATCH 01/24] bsg: remove support for SCSI_IOCTL_SEND_COMMAND Christoph Hellwig
2021-07-22 17:31 ` Bart Van Assche
2021-07-22 19:05 ` Christoph Hellwig
2021-07-12 5:47 ` [PATCH 02/24] sr: consolidate compat ioctl handling Christoph Hellwig
2021-07-12 5:47 ` [PATCH 03/24] sd: " Christoph Hellwig
2021-07-12 5:47 ` [PATCH 04/24] ch: " Christoph Hellwig
2021-07-12 5:47 ` [PATCH 05/24] cg: " Christoph Hellwig
2021-07-12 5:47 ` [PATCH 06/24] scsi: remove scsi_compat_ioctl Christoph Hellwig
2021-07-12 5:47 ` [PATCH 07/24] st: simplify ioctl handling Christoph Hellwig
2021-07-12 5:48 ` [PATCH 08/24] cdrom: remove the call to scsi_cmd_blk_ioctl from cdrom_ioctl Christoph Hellwig
2021-07-12 5:48 ` [PATCH 09/24] scsi_ioctl: remove scsi_cmd_blk_ioctl Christoph Hellwig
2021-07-12 5:48 ` [PATCH 10/24] scsi_ioctl: remove scsi_verify_blk_ioctl Christoph Hellwig
2021-07-12 5:48 ` [PATCH 11/24] scsi: call scsi_cmd_ioctl from scsi_ioctl Christoph Hellwig
2021-07-12 5:48 ` Christoph Hellwig [this message]
2021-07-22 17:37 ` [PATCH 12/24] block: add a queue_max_sectors_bytes helper Bart Van Assche
2021-07-22 19:08 ` Christoph Hellwig
2021-07-22 18:00 ` Martin K. Petersen
2021-07-22 19:10 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 13/24] bsg: decouple from scsi_cmd_ioctl Christoph Hellwig
2021-07-12 5:48 ` [PATCH 14/24] bsg: move bsg_scsi_ops to drivers/scsi/ Christoph Hellwig
2021-07-22 18:03 ` Martin K. Petersen
2021-07-22 19:11 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 15/24] scsi_ioctl: remove scsi_req_init Christoph Hellwig
2021-07-12 5:48 ` [PATCH 16/24] scsi_ioctl: move scsi_command_size_tbl to scsi_common.c Christoph Hellwig
2021-07-12 5:48 ` [PATCH 17/24] scsi_ioctl: simplify SCSI passthrough permission checking Christoph Hellwig
2021-07-22 17:47 ` Bart Van Assche
2021-07-22 19:12 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 18/24] scsi_ioctl: move all "block layer" SCSI ioctl handling to drivers/scsi Christoph Hellwig
2021-07-22 18:06 ` Martin K. Petersen
2021-07-22 19:16 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 19/24] scsi: rename CONFIG_BLK_SCSI_REQUEST to CONFIG_SCSI_COMMON Christoph Hellwig
2021-07-22 17:51 ` Martin K. Petersen
2021-07-22 19:17 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 20/24] scsi: remove a very misleading comment Christoph Hellwig
2021-07-22 17:52 ` Bart Van Assche
2021-07-22 19:21 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 21/24] scsi: consolidate the START STOP UNIT handling Christoph Hellwig
2021-07-22 18:44 ` Bart Van Assche
2021-07-22 19:20 ` Christoph Hellwig
2021-07-12 5:48 ` [PATCH 22/24] scsi: factor SCSI_IOCTL_GET_IDLUN handling into a helper Christoph Hellwig
2021-07-12 5:48 ` [PATCH 23/24] scsi: factor SG_IO " Christoph Hellwig
2021-07-12 5:48 ` [PATCH 24/24] scsi: unexport sg_scsi_ioctl Christoph Hellwig
2021-07-21 5:38 ` cleanup SCSI ioctl support Christoph Hellwig
2021-07-24 7:20 cleanup SCSI ioctl support v2 Christoph Hellwig
2021-07-24 7:20 ` [PATCH 12/24] block: add a queue_max_sectors_bytes helper Christoph Hellwig
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