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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 04/24] ch: consolidate compat ioctl handling
Date: Mon, 12 Jul 2021 07:47:56 +0200	[thread overview]
Message-ID: <20210712054816.4147559-5-hch@lst.de> (raw)
In-Reply-To: <20210712054816.4147559-1-hch@lst.de>

Merge the native and compat ioctl handlers into a single one using
in_compat_syscall().

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/ch.c | 73 ++++++++++++++---------------------------------
 1 file changed, 22 insertions(+), 51 deletions(-)

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index fc7197abfcdf..e89f226cae5c 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -618,6 +618,12 @@ ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
 	return 0;
 }
 
+struct changer_element_status32 {
+	int		ces_type;
+	compat_uptr_t	ces_data;
+};
+#define CHIOGSTATUS32  _IOW('c', 8,struct changer_element_status32)
+
 static long ch_ioctl(struct file *file,
 		    unsigned int cmd, unsigned long arg)
 {
@@ -748,7 +754,20 @@ static long ch_ioctl(struct file *file,
 
 		return ch_gstatus(ch, ces.ces_type, ces.ces_data);
 	}
+#ifdef CONFIG_COMPAT
+	case CHIOGSTATUS32:
+	{
+		struct changer_element_status32 ces32;
+
+		if (copy_from_user(&ces32, argp, sizeof (ces32)))
+			return -EFAULT;
+		if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
+			return -EINVAL;
 
+		return ch_gstatus(ch, ces32.ces_type,
+				  compat_ptr(ces32.ces_data));
+	}
+#endif
 	case CHIOGELEM:
 	{
 		struct changer_get_element cge;
@@ -858,59 +877,13 @@ static long ch_ioctl(struct file *file,
 	}
 
 	default:
+		if (in_compat_syscall())
+			return scsi_compat_ioctl(ch->device, cmd, argp);
 		return scsi_ioctl(ch->device, cmd, argp);
 
 	}
 }
 
-#ifdef CONFIG_COMPAT
-
-struct changer_element_status32 {
-	int		ces_type;
-	compat_uptr_t	ces_data;
-};
-#define CHIOGSTATUS32  _IOW('c', 8,struct changer_element_status32)
-
-static long ch_ioctl_compat(struct file * file,
-			    unsigned int cmd, unsigned long arg)
-{
-	scsi_changer *ch = file->private_data;
-	int retval = scsi_ioctl_block_when_processing_errors(ch->device, cmd,
-							file->f_flags & O_NDELAY);
-	if (retval)
-		return retval;
-
-	switch (cmd) {
-	case CHIOGPARAMS:
-	case CHIOGVPARAMS:
-	case CHIOPOSITION:
-	case CHIOMOVE:
-	case CHIOEXCHANGE:
-	case CHIOGELEM:
-	case CHIOINITELEM:
-	case CHIOSVOLTAG:
-		/* compatible */
-		return ch_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
-	case CHIOGSTATUS32:
-	{
-		struct changer_element_status32 ces32;
-		unsigned char __user *data;
-
-		if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
-			return -EFAULT;
-		if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
-			return -EINVAL;
-
-		data = compat_ptr(ces32.ces_data);
-		return ch_gstatus(ch, ces32.ces_type, data);
-	}
-	default:
-		return scsi_compat_ioctl(ch->device, cmd, compat_ptr(arg));
-
-	}
-}
-#endif
-
 /* ------------------------------------------------------------------------ */
 
 static int ch_probe(struct device *dev)
@@ -1015,9 +988,7 @@ static const struct file_operations changer_fops = {
 	.open		= ch_open,
 	.release	= ch_release,
 	.unlocked_ioctl	= ch_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= ch_ioctl_compat,
-#endif
+	.compat_ioctl	= compat_ptr_ioctl,
 	.llseek		= noop_llseek,
 };
 
-- 
2.30.2


  parent reply	other threads:[~2021-07-12  5:50 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 ` Christoph Hellwig [this message]
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 ` [PATCH 12/24] block: add a queue_max_sectors_bytes helper Christoph Hellwig
2021-07-22 17:37   ` 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 04/24] ch: consolidate compat ioctl handling Christoph Hellwig

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