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 <[email protected]> Signed-off-by: Evan Green <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ambv · Jul 3, 2018 · 9fea4b3 · 9fea4b3
1 parent 64dafbc
commit 9fea4b3
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
@@ -1612,6 +1612,7 @@ 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: