UPSTREAM: loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl
authorEvan Green <evgreen@chromium.org>
Mon, 2 Jul 2018 23:03:46 +0000 (16:03 -0700)
committerivanmeler <i_ivan@windowslive.com>
Wed, 13 Apr 2022 21:13:58 +0000 (21:13 +0000)
This change adds LOOP_SET_BLOCK_SIZE as one of the supported ioctls
in lo_compat_ioctl. It only takes an unsigned long argument, and
in practice a 32-bit value works fine.

Bug: 117823094
Change-Id: I0061a082eb2632c47b7d66f35f2c909d33ff1653
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit 9fea4b395260175de4016b42982f45a3e6e03d0b)
Signed-off-by: Martijn Coenen <maco@android.com>
drivers/block/loop.c

index 369ca34f46d74be3cb36613df27d00a3a4022080..9c7905f471057efcd35044b470df7a0b1515c36a 100644 (file)
@@ -1568,6 +1568,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
                arg = (unsigned long) compat_ptr(arg);
        case LOOP_SET_FD:
        case LOOP_CHANGE_FD:
+       case LOOP_SET_BLOCK_SIZE:
                err = lo_ioctl(bdev, mode, cmd, arg);
                break;
        default: