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. 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>
barlumiicheal · Oct 4, 2019 · 2aca463 · 2aca463
1 parent 4a04da5
commit 2aca463
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
@@ -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: