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Date: Sat,  2 Dec 2023 13:12:25 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	Jakub Kicinski <kuba@...nel.org>,
	jiri@...nulli.us
Subject: [PATCH net-next] tools: ynl: move private definitions to a separate header

ynl.h has a growing amount of "internal" stuff, which may confuse
users who try to take a look at the external API. Currently the
internals are at the bottom of the file with a banner in between,
but this arrangement makes it hard to add external APIs / inline
helpers which need internal definitions.

Move internals to a separate header.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: jiri@...nulli.us
---
 tools/net/ynl/lib/ynl-priv.h | 144 ++++++++++++++++++++++++++++++++++
 tools/net/ynl/lib/ynl.h      | 148 +----------------------------------
 2 files changed, 145 insertions(+), 147 deletions(-)
 create mode 100644 tools/net/ynl/lib/ynl-priv.h

diff --git a/tools/net/ynl/lib/ynl-priv.h b/tools/net/ynl/lib/ynl-priv.h
new file mode 100644
index 000000000000..ad9006a7c667
--- /dev/null
+++ b/tools/net/ynl/lib/ynl-priv.h
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+#ifndef __YNL_C_PRIV_H
+#define __YNL_C_PRIV_H 1
+
+#include <stddef.h>
+#include <libmnl/libmnl.h>
+#include <linux/types.h>
+
+/*
+ * YNL internals / low level stuff
+ */
+
+/* Generic mnl helper code */
+
+enum ynl_policy_type {
+	YNL_PT_REJECT = 1,
+	YNL_PT_IGNORE,
+	YNL_PT_NEST,
+	YNL_PT_FLAG,
+	YNL_PT_BINARY,
+	YNL_PT_U8,
+	YNL_PT_U16,
+	YNL_PT_U32,
+	YNL_PT_U64,
+	YNL_PT_UINT,
+	YNL_PT_NUL_STR,
+	YNL_PT_BITFIELD32,
+};
+
+struct ynl_policy_attr {
+	enum ynl_policy_type type;
+	unsigned int len;
+	const char *name;
+	struct ynl_policy_nest *nest;
+};
+
+struct ynl_policy_nest {
+	unsigned int max_attr;
+	struct ynl_policy_attr *table;
+};
+
+struct ynl_parse_arg {
+	struct ynl_sock *ys;
+	struct ynl_policy_nest *rsp_policy;
+	void *data;
+};
+
+struct ynl_dump_list_type {
+	struct ynl_dump_list_type *next;
+	unsigned char data[] __attribute__((aligned(8)));
+};
+extern struct ynl_dump_list_type *YNL_LIST_END;
+
+static inline bool ynl_dump_obj_is_last(void *obj)
+{
+	unsigned long uptr = (unsigned long)obj;
+
+	uptr -= offsetof(struct ynl_dump_list_type, data);
+	return uptr == (unsigned long)YNL_LIST_END;
+}
+
+static inline void *ynl_dump_obj_next(void *obj)
+{
+	unsigned long uptr = (unsigned long)obj;
+	struct ynl_dump_list_type *list;
+
+	uptr -= offsetof(struct ynl_dump_list_type, data);
+	list = (void *)uptr;
+	uptr = (unsigned long)list->next;
+	uptr += offsetof(struct ynl_dump_list_type, data);
+
+	return (void *)uptr;
+}
+
+struct ynl_ntf_base_type {
+	__u16 family;
+	__u8 cmd;
+	struct ynl_ntf_base_type *next;
+	void (*free)(struct ynl_ntf_base_type *ntf);
+	unsigned char data[] __attribute__((aligned(8)));
+};
+
+extern mnl_cb_t ynl_cb_array[NLMSG_MIN_TYPE];
+
+struct nlmsghdr *
+ynl_gemsg_start_req(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
+struct nlmsghdr *
+ynl_gemsg_start_dump(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
+
+int ynl_attr_validate(struct ynl_parse_arg *yarg, const struct nlattr *attr);
+
+int ynl_recv_ack(struct ynl_sock *ys, int ret);
+int ynl_cb_null(const struct nlmsghdr *nlh, void *data);
+
+/* YNL specific helpers used by the auto-generated code */
+
+struct ynl_req_state {
+	struct ynl_parse_arg yarg;
+	mnl_cb_t cb;
+	__u32 rsp_cmd;
+};
+
+struct ynl_dump_state {
+	struct ynl_sock *ys;
+	struct ynl_policy_nest *rsp_policy;
+	void *first;
+	struct ynl_dump_list_type *last;
+	size_t alloc_sz;
+	mnl_cb_t cb;
+	__u32 rsp_cmd;
+};
+
+struct ynl_ntf_info {
+	struct ynl_policy_nest *policy;
+	mnl_cb_t cb;
+	size_t alloc_sz;
+	void (*free)(struct ynl_ntf_base_type *ntf);
+};
+
+int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
+	     struct ynl_req_state *yrs);
+int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
+		  struct ynl_dump_state *yds);
+
+void ynl_error_unknown_notification(struct ynl_sock *ys, __u8 cmd);
+int ynl_error_parse(struct ynl_parse_arg *yarg, const char *msg);
+
+#ifndef MNL_HAS_AUTO_SCALARS
+static inline uint64_t mnl_attr_get_uint(const struct nlattr *attr)
+{
+	if (mnl_attr_get_payload_len(attr) == 4)
+		return mnl_attr_get_u32(attr);
+	return mnl_attr_get_u64(attr);
+}
+
+static inline void
+mnl_attr_put_uint(struct nlmsghdr *nlh, uint16_t type, uint64_t data)
+{
+	if ((uint32_t)data == (uint64_t)data)
+		return mnl_attr_put_u32(nlh, type, data);
+	return mnl_attr_put_u64(nlh, type, data);
+}
+#endif
+#endif
diff --git a/tools/net/ynl/lib/ynl.h b/tools/net/ynl/lib/ynl.h
index 075d868f3b57..5de580b992b8 100644
--- a/tools/net/ynl/lib/ynl.h
+++ b/tools/net/ynl/lib/ynl.h
@@ -3,20 +3,10 @@
 #define __YNL_C_H 1
 
 #include <stddef.h>
-#include <libmnl/libmnl.h>
 #include <linux/genetlink.h>
 #include <linux/types.h>
 
-struct mnl_socket;
-struct nlmsghdr;
-
-/*
- * User facing code
- */
-
-struct ynl_ntf_base_type;
-struct ynl_ntf_info;
-struct ynl_sock;
+#include "ynl-priv.h"
 
 enum ynl_error_code {
 	YNL_ERROR_NONE = 0,
@@ -116,140 +106,4 @@ static inline bool ynl_has_ntf(struct ynl_sock *ys)
 struct ynl_ntf_base_type *ynl_ntf_dequeue(struct ynl_sock *ys);
 
 void ynl_ntf_free(struct ynl_ntf_base_type *ntf);
-
-/*
- * YNL internals / low level stuff
- */
-
-/* Generic mnl helper code */
-
-enum ynl_policy_type {
-	YNL_PT_REJECT = 1,
-	YNL_PT_IGNORE,
-	YNL_PT_NEST,
-	YNL_PT_FLAG,
-	YNL_PT_BINARY,
-	YNL_PT_U8,
-	YNL_PT_U16,
-	YNL_PT_U32,
-	YNL_PT_U64,
-	YNL_PT_UINT,
-	YNL_PT_NUL_STR,
-	YNL_PT_BITFIELD32,
-};
-
-struct ynl_policy_attr {
-	enum ynl_policy_type type;
-	unsigned int len;
-	const char *name;
-	struct ynl_policy_nest *nest;
-};
-
-struct ynl_policy_nest {
-	unsigned int max_attr;
-	struct ynl_policy_attr *table;
-};
-
-struct ynl_parse_arg {
-	struct ynl_sock *ys;
-	struct ynl_policy_nest *rsp_policy;
-	void *data;
-};
-
-struct ynl_dump_list_type {
-	struct ynl_dump_list_type *next;
-	unsigned char data[] __attribute__((aligned(8)));
-};
-extern struct ynl_dump_list_type *YNL_LIST_END;
-
-static inline bool ynl_dump_obj_is_last(void *obj)
-{
-	unsigned long uptr = (unsigned long)obj;
-
-	uptr -= offsetof(struct ynl_dump_list_type, data);
-	return uptr == (unsigned long)YNL_LIST_END;
-}
-
-static inline void *ynl_dump_obj_next(void *obj)
-{
-	unsigned long uptr = (unsigned long)obj;
-	struct ynl_dump_list_type *list;
-
-	uptr -= offsetof(struct ynl_dump_list_type, data);
-	list = (void *)uptr;
-	uptr = (unsigned long)list->next;
-	uptr += offsetof(struct ynl_dump_list_type, data);
-
-	return (void *)uptr;
-}
-
-struct ynl_ntf_base_type {
-	__u16 family;
-	__u8 cmd;
-	struct ynl_ntf_base_type *next;
-	void (*free)(struct ynl_ntf_base_type *ntf);
-	unsigned char data[] __attribute__((aligned(8)));
-};
-
-extern mnl_cb_t ynl_cb_array[NLMSG_MIN_TYPE];
-
-struct nlmsghdr *
-ynl_gemsg_start_req(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
-struct nlmsghdr *
-ynl_gemsg_start_dump(struct ynl_sock *ys, __u32 id, __u8 cmd, __u8 version);
-
-int ynl_attr_validate(struct ynl_parse_arg *yarg, const struct nlattr *attr);
-
-int ynl_recv_ack(struct ynl_sock *ys, int ret);
-int ynl_cb_null(const struct nlmsghdr *nlh, void *data);
-
-/* YNL specific helpers used by the auto-generated code */
-
-struct ynl_req_state {
-	struct ynl_parse_arg yarg;
-	mnl_cb_t cb;
-	__u32 rsp_cmd;
-};
-
-struct ynl_dump_state {
-	struct ynl_sock *ys;
-	struct ynl_policy_nest *rsp_policy;
-	void *first;
-	struct ynl_dump_list_type *last;
-	size_t alloc_sz;
-	mnl_cb_t cb;
-	__u32 rsp_cmd;
-};
-
-struct ynl_ntf_info {
-	struct ynl_policy_nest *policy;
-	mnl_cb_t cb;
-	size_t alloc_sz;
-	void (*free)(struct ynl_ntf_base_type *ntf);
-};
-
-int ynl_exec(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
-	     struct ynl_req_state *yrs);
-int ynl_exec_dump(struct ynl_sock *ys, struct nlmsghdr *req_nlh,
-		  struct ynl_dump_state *yds);
-
-void ynl_error_unknown_notification(struct ynl_sock *ys, __u8 cmd);
-int ynl_error_parse(struct ynl_parse_arg *yarg, const char *msg);
-
-#ifndef MNL_HAS_AUTO_SCALARS
-static inline uint64_t mnl_attr_get_uint(const struct nlattr *attr)
-{
-	if (mnl_attr_get_payload_len(attr) == 4)
-		return mnl_attr_get_u32(attr);
-	return mnl_attr_get_u64(attr);
-}
-
-static inline void
-mnl_attr_put_uint(struct nlmsghdr *nlh, uint16_t type, uint64_t data)
-{
-	if ((uint32_t)data == (uint64_t)data)
-		return mnl_attr_put_u32(nlh, type, data);
-	return mnl_attr_put_u64(nlh, type, data);
-}
-#endif
 #endif
-- 
2.43.0


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