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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 11/24] scsi: call scsi_cmd_ioctl from scsi_ioctl
Date: Sat, 24 Jul 2021 09:20:20 +0200	[thread overview]
Message-ID: <20210724072033.1284840-12-hch@lst.de> (raw)
In-Reply-To: <20210724072033.1284840-1-hch@lst.de>

Ensure SCSI ULD only have to call a single ioctl helper.  This also adds
a bunch of missing ioctls to the ch driver, and removes the need for a
duplicate implementation of  SCSI_IOCTL_SEND_COMMAND command.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/ch.c         |  2 +-
 drivers/scsi/scsi_ioctl.c | 17 ++++++++++++-----
 drivers/scsi/sd.c         | 18 +-----------------
 drivers/scsi/sg.c         |  2 +-
 drivers/scsi/sr.c         | 16 ++--------------
 drivers/scsi/st.c         | 10 +---------
 include/scsi/scsi_ioctl.h |  4 +++-
 7 files changed, 21 insertions(+), 48 deletions(-)

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index 87df8cd880e0..159ab7ccaf7b 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -877,7 +877,7 @@ static long ch_ioctl(struct file *file,
 	}
 
 	default:
-		return scsi_ioctl(ch->device, cmd, argp);
+		return scsi_ioctl(ch->device, NULL, file->f_mode, cmd, argp);
 
 	}
 }
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 7b2e3cc85e66..7739575b5229 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -192,6 +192,8 @@ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg)
 /**
  * scsi_ioctl - Dispatch ioctl to scsi device
  * @sdev: scsi device receiving ioctl
+ * @disk: disk receiving the ioctl
+ * @mode: mode the block/char device is opened with
  * @cmd: which ioctl is it
  * @arg: data associated with ioctl
  *
@@ -199,10 +201,13 @@ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg)
  * does not take a major/minor number as the dev field.  Rather, it takes
  * a pointer to a &struct scsi_device.
  */
-int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
+		int cmd, void __user *arg)
 {
+	struct request_queue *q = sdev->request_queue;
 	char scsi_cmd[MAX_COMMAND_SIZE];
 	struct scsi_sense_hdr sense_hdr;
+	int error;
 
 	/* Check for deprecated ioctls ... all the ioctls which don't
 	 * follow the new unique numbering scheme are deprecated */
@@ -220,6 +225,12 @@ int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
 		break;
 	}
 
+	if (cmd != SCSI_IOCTL_GET_IDLUN && cmd != SCSI_IOCTL_GET_BUS_NUMBER) {
+		error = scsi_cmd_ioctl(q, disk, mode, cmd, arg);
+		if (error != -ENOTTY)
+			return error;
+	}
+
 	switch (cmd) {
 	case SCSI_IOCTL_GET_IDLUN: {
 		struct scsi_idlun v = {
@@ -237,10 +248,6 @@ int scsi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
 		return put_user(sdev->host->host_no, (int __user *)arg);
 	case SCSI_IOCTL_PROBE_HOST:
 		return ioctl_probe(sdev->host, arg);
-	case SCSI_IOCTL_SEND_COMMAND:
-		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
-			return -EACCES;
-		return sg_scsi_ioctl(sdev->request_queue, NULL, 0, arg);
 	case SCSI_IOCTL_DOORLOCK:
 		return scsi_set_medium_removal(sdev, SCSI_REMOVAL_PREVENT);
 	case SCSI_IOCTL_DOORUNLOCK:
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 78025acad6e3..d8b0bd6d9a9b 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1570,23 +1570,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
 
 	if (is_sed_ioctl(cmd))
 		return sed_ioctl(sdkp->opal_dev, cmd, p);
-
-	/*
-	 * Send SCSI addressing ioctls directly to mid level, send other
-	 * ioctls to block level and then onto mid level if they can't be
-	 * resolved.
-	 */
-	switch (cmd) {
-	case SCSI_IOCTL_GET_IDLUN:
-	case SCSI_IOCTL_GET_BUS_NUMBER:
-		break;
-	default:
-		error = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, p);
-		if (error != -ENOTTY)
-			return error;
-	}
-
-	return scsi_ioctl(sdp, cmd, p);
+	return scsi_ioctl(sdp, disk, mode, cmd, p);
 }
 
 static void set_media_not_present(struct scsi_disk *sdkp)
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index c3562c2d0dca..6cb1e4b6eac2 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1165,7 +1165,7 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
 	ret = sg_ioctl_common(filp, sdp, sfp, cmd_in, p);
 	if (ret != -ENOIOCTLCMD)
 		return ret;
-	return scsi_ioctl(sdp->device, cmd_in, p);
+	return scsi_ioctl(sdp->device, NULL, filp->f_mode, cmd_in, p);
 }
 
 static __poll_t
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index e6eadba4d638..b98e77fe700b 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -574,24 +574,12 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
 
 	scsi_autopm_get_device(sdev);
 
-	/*
-	 * Send SCSI addressing ioctls directly to mid level, send other
-	 * ioctls to cdrom/block level.
-	 */
-	switch (cmd) {
-	case SCSI_IOCTL_GET_IDLUN:
-	case SCSI_IOCTL_GET_BUS_NUMBER:
-		break;
-	default:
-		ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
-		if (ret != -ENOTTY)
-			goto put;
+	if (ret != CDROMCLOSETRAY && ret != CDROMEJECT) {
 		ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
 		if (ret != -ENOSYS)
 			goto put;
 	}
-
-	ret = scsi_ioctl(sdev, cmd, argp);
+	ret = scsi_ioctl(sdev, disk, mode, cmd, argp);
 
 put:
 	scsi_autopm_put_device(sdev);
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 9274f665bc0f..2d1b0594af69 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3823,24 +3823,16 @@ static long st_ioctl(struct file *file, unsigned int cmd_in, unsigned long arg)
 	mutex_unlock(&STp->lock);
 
 	switch (cmd_in) {
-	case SCSI_IOCTL_GET_IDLUN:
-	case SCSI_IOCTL_GET_BUS_NUMBER:
-		break;
 	case SG_IO:
 	case SCSI_IOCTL_SEND_COMMAND:
 	case CDROM_SEND_PACKET:
 		if (!capable(CAP_SYS_RAWIO))
 			return -EPERM;
-		fallthrough;
 	default:
-		retval = scsi_cmd_ioctl(STp->disk->queue, STp->disk,
-					file->f_mode, cmd_in, p);
-		if (retval != -ENOTTY)
-			return retval;
 		break;
 	}
 
-	retval = scsi_ioctl(STp->device, cmd_in, p);
+	retval = scsi_ioctl(STp->device, STp->disk, file->f_mode, cmd_in, p);
 	if (!retval && cmd_in == SCSI_IOCTL_STOP_UNIT) {
 		/* unload */
 		STp->rew_at_close = 0;
diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h
index cdb3ba3451e7..defbe8084eb8 100644
--- a/include/scsi/scsi_ioctl.h
+++ b/include/scsi/scsi_ioctl.h
@@ -18,6 +18,7 @@
 
 #ifdef __KERNEL__
 
+struct gendisk;
 struct scsi_device;
 
 /*
@@ -43,7 +44,8 @@ typedef struct scsi_fctargaddress {
 
 int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev,
 		int cmd, bool ndelay);
-extern int scsi_ioctl(struct scsi_device *, int, void __user *);
+int scsi_ioctl(struct scsi_device *sdev, struct gendisk *disk, fmode_t mode,
+		int cmd, void __user *arg);
 
 #endif /* __KERNEL__ */
 #endif /* _SCSI_IOCTL_H */
-- 
2.30.2


  parent reply	other threads:[~2021-07-24  7:24 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 ` [PATCH 03/24] sd: " Christoph Hellwig
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 ` Christoph Hellwig [this message]
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  5:48 ` [PATCH 11/24] scsi: call scsi_cmd_ioctl from scsi_ioctl Christoph Hellwig

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