RDMA/uverbs: Add structure size info to write commands

We need the structure sizes to compute the location of the udata in the
core code. Annotate the sizes into the new macro language.

This is generated largely by script and checked by comparing against the
similar list in rdma-core.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

drivers/infiniband/core/rdma_core.h

@@ -142,6 +142,10 @@ struct uverbs_api_write_method {
 			  struct ib_udata *ucore, struct ib_udata *uhw);
 	u8 disabled:1;
 	u8 is_ex:1;
+	u8 has_udata:1;
+	u8 has_resp:1;
+	u8 req_size;
+	u8 resp_size;
 };
 
 struct uverbs_api_attr {

drivers/infiniband/core/uverbs_uapi.c

@@ -96,6 +96,13 @@ static int uapi_create_write(struct uverbs_api *uapi,
 					 BIT_ULL(def->write.command_num));
 	}
 
+	if (!def->write.is_ex && def->func_write) {
+		method_elm->has_udata = def->write.has_udata;
+		method_elm->has_resp = def->write.has_resp;
+		method_elm->req_size = def->write.req_size;
+		method_elm->resp_size = def->write.resp_size;
+	}
+
 	*cur_method_key = method_key;
 	return 0;
 }

include/rdma/uverbs_ioctl.h

@@ -360,8 +360,12 @@ struct uapi_definition {
 			u16 object_id;
 		} object_start;
 		struct {
-			u8 is_ex;
 			u16 command_num;
+			u8 is_ex:1;
+			u8 has_udata:1;
+			u8 has_resp:1;
+			u8 req_size;
+			u8 resp_size;
 		} write;
 	};
 
@@ -388,22 +392,24 @@ struct uapi_definition {
 		##__VA_ARGS__
 
 /* Use in a var_args of DECLARE_UVERBS_OBJECT */
-#define DECLARE_UVERBS_WRITE(_command_num, _func, ...)                         \
+#define DECLARE_UVERBS_WRITE(_command_num, _func, _cmd_desc, ...)              \
 	{                                                                      \
 		.kind = UAPI_DEF_WRITE,                                        \
 		.scope = UAPI_SCOPE_OBJECT,                                    \
 		.write = { .is_ex = 0, .command_num = _command_num },          \
 		.func_write = _func,                                           \
+		_cmd_desc,                                                     \
 	},                                                                     \
 		##__VA_ARGS__
 
 /* Use in a var_args of DECLARE_UVERBS_OBJECT */
-#define DECLARE_UVERBS_WRITE_EX(_command_num, _func, ...)                      \
+#define DECLARE_UVERBS_WRITE_EX(_command_num, _func, _cmd_desc, ...)           \
 	{                                                                      \
 		.kind = UAPI_DEF_WRITE,                                        \
 		.scope = UAPI_SCOPE_OBJECT,                                    \
 		.write = { .is_ex = 1, .command_num = _command_num },          \
 		.func_write_ex = _func,                                        \
+		_cmd_desc,                                                     \
 	},                                                                     \
 		##__VA_ARGS__