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compat_ioctl: block: handle Persistent Reservations 

commit b2c0fcd287 upstream.

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

Cc: <stable@vger.kernel.org> # v4.4+
Fixes: bbd3e06436 ("block: add an API for Persistent Reservations")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

Signed-off-by: Jens Axboe <axboe@kernel.dk>
5.4-rM2-2.2.x-imx-squashed
Arnd Bergmann 2019-11-29 11:28:22 +01:00 committed by Greg Kroah-Hartman
parent 842c4cd688
commit 755d02fcf8
1 changed files with 9 additions and 0 deletions
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9
block/compat_ioctl.c
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@ -6,6 +6,7 @@
#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>
@ -401,6 +402,14 @@ 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);