[PATCH 4.4 19/59] compat_ioctl: block: handle Persistent Reservations

[Greg Kroah-Hartman]

From: Arnd Bergmann <arnd@xxxxxxxx>

commit b2c0fcd28772f99236d261509bcd242135677965 upstream.

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

Cc: <stable@xxxxxxxxxxxxxxx> # v4.4+
Fixes: bbd3e064362e ("block: add an API for Persistent Reservations")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

Fold in followup patch from Arnd with missing pr.h header include.

Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>

---
 block/compat_ioctl.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -5,6 +5,7 @@
 #include <linux/compat.h>
 #include <linux/elevator.h>
 #include <linux/hdreg.h>
+#include <linux/pr.h>
 #include <linux/slab.h>
 #include <linux/syscalls.h>
 #include <linux/types.h>
@@ -406,6 +407,14 @@ long compat_blkdev_ioctl(struct file *fi
 	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);