compat_ioctl: block: handle Persistent Reservations

BugLink: https://bugs.launchpad.net/bugs/1860602
commit b2c0fcd28772f99236d261509bcd242135677965 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: bbd3e064362e ("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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index 6ca015f92766e9052d444f9e81ba3c307846166c..413bd5c5380b5c1907896677f93945ab04e0bbda 100644 (file)
--- a/block/compat_ioctl.c
+++ b/block/compat_ioctl.c
@@ -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);