linux-kernel - [PATCH v2 05/27] compat_ioctl: block: handle Persistent Reservations

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Date:   Tue, 17 Dec 2019 23:16:46 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Jens Axboe <axboe@...nel.dk>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-scsi@...r.kernel.org, linux-block@...r.kernel.org,
        y2038@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        linux-doc@...r.kernel.org, corbet@....net, viro@...iv.linux.org.uk,
        linux-fsdevel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        stable@...r.kernel.org
Subject: [PATCH v2 05/27] compat_ioctl: block: handle Persistent Reservations

These were added to blkdev_ioctl() in linux-5.5 but not
blkdev_compat_ioctl, so add them now.

Cc: <stable@...r.kernel.org> # v4.4+
Fixes: bbd3e064362e ("block: add an API for Persistent Reservations")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 block/compat_ioctl.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 5b13e344229c..f16ae92065d7 100644
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -408,6 +408,14 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	case BLKTRACETEARDOWN: /* compatible */
 		ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
 		return ret;
+	case IOC_PR_REGISTER:
+	case IOC_PR_RESERVE:
+	case IOC_PR_RELEASE:
+	case IOC_PR_PREEMPT:
+	case IOC_PR_PREEMPT_ABORT:
+	case IOC_PR_CLEAR:
+		return blkdev_ioctl(bdev, mode, cmd,
+				(unsigned long)compat_ptr(arg));
 	default:
 		if (disk->fops->compat_ioctl)
 			ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
-- 
2.20.0