Commit a144472d authored Jul 02, 2018 by Evan Green Committed by Martijn Coenen Oct 16, 2018

UPSTREAM: loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl



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.

Change-Id: Ibaba5e1d446e140e39c317b01c301ce0cf4096ff
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>

parent b1e7b4e2

drivers/block/loop.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1570,6 +1570,7 @@ 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: