Commit a13dee53 authored Jul 02, 2018 by Evan Green Committed by Alistair Delva Mar 03, 2020

BACKPORT: 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.

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 9fea4b39)
[adelva: trivially backported around another backport conflict]
Bug: 150622092
Change-Id: I98e14d3ab60ca638c3aebcea942e2207c738af95
Signed-off-by: Alistair Delva <adelva@google.com>

parent 1cb89b32

drivers/block/loop.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1615,6 +1615,7 @@ 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:
		case LOOP_SET_DIRECT_IO:
		err = lo_ioctl(bdev, mode, cmd, arg);
		break;