linux-block.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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 03/24] sd: consolidate compat ioctl handling
Date: Sat, 24 Jul 2021 09:20:12 +0200	[thread overview]
Message-ID: <20210724072033.1284840-4-hch@lst.de> (raw)
In-Reply-To: <20210724072033.1284840-1-hch@lst.de>

Merge the native and compat ioctl handlers into a single one using
in_compat_syscall(), and also simplify the calling conventions
by mergin sd_ioctl_common into sd_ioctl.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/sd.c | 63 ++++++++++++++---------------------------------
 1 file changed, 18 insertions(+), 45 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b8d55af763f9..3fc06ccb12cc 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1529,11 +1529,11 @@ static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 }
 
 /**
- *	sd_ioctl_common - process an ioctl
+ *	sd_ioctl - process an ioctl
  *	@bdev: target block device
  *	@mode: FMODE_* mask
  *	@cmd: ioctl command number
- *	@p: this is third argument given to ioctl(2) system call.
+ *	@arg: this is third argument given to ioctl(2) system call.
  *	Often contains a pointer.
  *
  *	Returns 0 if successful (some ioctls return positive numbers on
@@ -1542,12 +1542,13 @@ static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
  *	Note: most ioctls are forward onto the block subsystem or further
  *	down in the scsi subsystem.
  **/
-static int sd_ioctl_common(struct block_device *bdev, fmode_t mode,
-			   unsigned int cmd, void __user *p)
+static int sd_ioctl(struct block_device *bdev, fmode_t mode,
+		    unsigned int cmd, unsigned long arg)
 {
 	struct gendisk *disk = bdev->bd_disk;
 	struct scsi_disk *sdkp = scsi_disk(disk);
 	struct scsi_device *sdp = sdkp->device;
+	void __user *p = (void __user *)arg;
 	int error;
     
 	SCSI_LOG_IOCTL(1, sd_printk(KERN_INFO, sdkp, "sd_ioctl: disk=%s, "
@@ -1566,7 +1567,7 @@ static int sd_ioctl_common(struct block_device *bdev, fmode_t mode,
 	error = scsi_ioctl_block_when_processing_errors(sdp, cmd,
 			(mode & FMODE_NDELAY) != 0);
 	if (error)
-		goto out;
+		return error;
 
 	if (is_sed_ioctl(cmd))
 		return sed_ioctl(sdkp->opal_dev, cmd, p);
@@ -1577,16 +1578,18 @@ static int sd_ioctl_common(struct block_device *bdev, fmode_t mode,
 	 * resolved.
 	 */
 	switch (cmd) {
-		case SCSI_IOCTL_GET_IDLUN:
-		case SCSI_IOCTL_GET_BUS_NUMBER:
-			error = scsi_ioctl(sdp, cmd, p);
-			break;
-		default:
-			error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
-			break;
+	case SCSI_IOCTL_GET_IDLUN:
+	case SCSI_IOCTL_GET_BUS_NUMBER:
+		break;
+	default:
+		error = scsi_cmd_blk_ioctl(bdev, mode, cmd, p);
+		if (error != -ENOTTY)
+			return error;
 	}
-out:
-	return error;
+
+	if (in_compat_syscall())
+		return scsi_compat_ioctl(sdp, cmd, p);
+	return scsi_ioctl(sdp, cmd, p);
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)
@@ -1769,34 +1772,6 @@ static void sd_rescan(struct device *dev)
 	sd_revalidate_disk(sdkp->disk);
 }
 
-static int sd_ioctl(struct block_device *bdev, fmode_t mode,
-		    unsigned int cmd, unsigned long arg)
-{
-	void __user *p = (void __user *)arg;
-	int ret;
-
-	ret = sd_ioctl_common(bdev, mode, cmd, p);
-	if (ret != -ENOTTY)
-		return ret;
-
-	return scsi_ioctl(scsi_disk(bdev->bd_disk)->device, cmd, p);
-}
-
-#ifdef CONFIG_COMPAT
-static int sd_compat_ioctl(struct block_device *bdev, fmode_t mode,
-			   unsigned int cmd, unsigned long arg)
-{
-	void __user *p = compat_ptr(arg);
-	int ret;
-
-	ret = sd_ioctl_common(bdev, mode, cmd, p);
-	if (ret != -ENOTTY)
-		return ret;
-
-	return scsi_compat_ioctl(scsi_disk(bdev->bd_disk)->device, cmd, p);
-}
-#endif
-
 static char sd_pr_type(enum pr_type type)
 {
 	switch (type) {
@@ -1897,9 +1872,7 @@ static const struct block_device_operations sd_fops = {
 	.release		= sd_release,
 	.ioctl			= sd_ioctl,
 	.getgeo			= sd_getgeo,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl		= sd_compat_ioctl,
-#endif
+	.compat_ioctl		= blkdev_compat_ptr_ioctl,
 	.check_events		= sd_check_events,
 	.unlock_native_capacity	= sd_unlock_native_capacity,
 	.report_zones		= sd_zbc_report_zones,
-- 
2.30.2


  parent reply	other threads:[~2021-07-24  7:21 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-24  7:20 cleanup SCSI ioctl support v2 Christoph Hellwig
2021-07-24  7:20 ` [PATCH 01/24] bsg: remove support for SCSI_IOCTL_SEND_COMMAND Christoph Hellwig
2021-07-28  1:32   ` Jens Axboe
2021-07-29  3:38   ` Martin K. Petersen
2021-07-24  7:20 ` [PATCH 02/24] sr: consolidate compat ioctl handling Christoph Hellwig
2021-07-24  7:20 ` Christoph Hellwig [this message]
2021-07-24  7:20 ` [PATCH 04/24] ch: " Christoph Hellwig
2021-07-24  7:20 ` [PATCH 05/24] cg: " Christoph Hellwig
2021-07-24  7:20 ` [PATCH 06/24] scsi: remove scsi_compat_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 07/24] st: simplify ioctl handling Christoph Hellwig
2021-07-24  7:20 ` [PATCH 08/24] cdrom: remove the call to scsi_cmd_blk_ioctl from cdrom_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 09/24] scsi_ioctl: remove scsi_cmd_blk_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 10/24] scsi_ioctl: remove scsi_verify_blk_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 11/24] scsi: call scsi_cmd_ioctl from scsi_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 12/24] block: add a queue_max_sectors_bytes helper Christoph Hellwig
2021-07-24  7:20 ` [PATCH 13/24] bsg: decouple from scsi_cmd_ioctl Christoph Hellwig
2021-07-24  7:20 ` [PATCH 14/24] bsg: move bsg_scsi_ops to drivers/scsi/ Christoph Hellwig
2021-07-30  7:27   ` Christoph Hellwig
2021-07-30 10:25     ` Anders Roxell
2021-07-24  7:20 ` [PATCH 15/24] scsi_ioctl: remove scsi_req_init Christoph Hellwig
2021-07-24  7:20 ` [PATCH 16/24] scsi_ioctl: move scsi_command_size_tbl to scsi_common.c Christoph Hellwig
2021-07-24  7:20 ` [PATCH 17/24] scsi_ioctl: simplify SCSI passthrough permission checking Christoph Hellwig
2021-07-24  7:20 ` [PATCH 18/24] scsi_ioctl: move the "block layer" SCSI ioctl handling to drivers/scsi Christoph Hellwig
2021-08-23  6:43   ` Halil Pasic
2021-08-23  6:49     ` Christoph Hellwig
2021-08-23 10:19       ` Halil Pasic
2021-08-23 10:22         ` Christoph Hellwig
2021-07-24  7:20 ` [PATCH 19/24] scsi: rename CONFIG_BLK_SCSI_REQUEST to CONFIG_SCSI_COMMON Christoph Hellwig
2021-07-24  7:20 ` [PATCH 20/24] scsi: remove a very misleading comment Christoph Hellwig
2021-07-24  7:20 ` [PATCH 21/24] scsi: consolidate the START STOP UNIT handling Christoph Hellwig
2021-07-24  7:20 ` [PATCH 22/24] scsi: factor SCSI_IOCTL_GET_IDLUN handling into a helper Christoph Hellwig
2021-07-24  7:20 ` [PATCH 23/24] scsi: factor SG_IO " Christoph Hellwig
2021-07-24  7:20 ` [PATCH 24/24] scsi: unexport sg_scsi_ioctl Christoph Hellwig
2021-07-27  2:52 ` cleanup SCSI ioctl support v2 Martin K. Petersen
  -- strict thread matches above, loose matches on Subject: below --
2021-07-12  5:47 cleanup SCSI ioctl support Christoph Hellwig
2021-07-12  5:47 ` [PATCH 03/24] sd: consolidate compat ioctl handling Christoph Hellwig

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210724072033.1284840-4-hch@lst.de \
    --to=hch@lst.de \
    --cc=Kai.Makisara@kolumbus.fi \
    --cc=axboe@kernel.dk \
    --cc=dgilbert@interlog.com \
    --cc=fujita.tomonori@lab.ntt.co.jp \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).