From 2d9c1bd7e177bd8b460403db9513b0a223e46ab8 Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Sun, 17 Jun 2018 12:59:53 +0300 Subject: IB/uverbs: Add a macro to define a type with no kernel known size Sometimes the uverbs uAPI doesn't really care about the structure it gets from user-space. All it wants to do is to allocate enough space and send it to the hardware/provider driver. Adding a UVERBS_ATTR_MIN_SIZE that could be used for this scenarios. We use USHRT_MAX as the kernel known size to bypass any zero validations. Signed-off-by: Matan Barak Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- include/rdma/uverbs_ioctl.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/rdma') diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h index 11cc40ef1cb6..970357d0ccc4 100644 --- a/include/rdma/uverbs_ioctl.h +++ b/include/rdma/uverbs_ioctl.h @@ -215,6 +215,8 @@ struct uverbs_object_tree_def { .min_len = ((uintptr_t)(&((_type *)0)->_last + 1)), .len = sizeof(_type) #define UVERBS_ATTR_SIZE(_min_len, _len) \ .min_len = _min_len, .len = _len +#define UVERBS_ATTR_MIN_SIZE(_min_len) \ + UVERBS_ATTR_SIZE(_min_len, USHRT_MAX) /* * In new compiler, UVERBS_ATTR could be simplified by declaring it as -- cgit v1.2.3