Merge branch 'tools-ynl-user-space-c'

Jakub Kicinski says:

====================
tools: ynl: user space C

Use the code gen which is already in tree to generate a user space
library for a handful of simple families. I find YNL C quite useful
in some WIP projects, and I think others may find it useful, too.
I was hoping someone will pick this work up and finish it...
but it seems that Python YNL has largely stolen the thunder.
Python may not be great for selftest, tho, and actually this lib
is more fully-featured. The Python script was meant as a quick demo,
funny how those things go.

v2: https://lore.kernel.org/all/20230604175843.662084-1-kuba@kernel.org/
v1: https://lore.kernel.org/all/20230603052547.631384-1-kuba@kernel.org/
====================

Link: https://lore.kernel.org/r/20230605190108.809439-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 337 insertions, 0 deletions

diff --git a/tools/net/ynl/generated/fou-user.h b/tools/net/ynl/generated/fou-user.h
new file mode 100644
index 000000000000..d8ab50579cd1
--- /dev/null
+++ b/tools/net/ynl/generated/fou-user.h
@@ -0,0 +1,337 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/fou.yaml */
+/* YNL-GEN user header */
+
+#ifndef _LINUX_FOU_GEN_H
+#define _LINUX_FOU_GEN_H
+
+#include <stdlib.h>
+#include <string.h>
+#include <linux/types.h>
+#include <linux/fou.h>
+
+struct ynl_sock;
+
+extern const struct ynl_family ynl_fou_family;
+
+/* Enums */
+const char *fou_op_str(int op);
+const char *fou_encap_type_str(int value);
+
+/* Common nested types */
+/* ============== FOU_CMD_ADD ============== */
+/* FOU_CMD_ADD - do */
+struct fou_add_req {
+	struct {
+		__u32 port:1;
+		__u32 ipproto:1;
+		__u32 type:1;
+		__u32 remcsum_nopartial:1;
+		__u32 local_v4:1;
+		__u32 peer_v4:1;
+		__u32 local_v6_len;
+		__u32 peer_v6_len;
+		__u32 peer_port:1;
+		__u32 ifindex:1;
+	} _present;
+
+	__u16 port /* big-endian */;
+	__u8 ipproto;
+	__u8 type;
+	__u32 local_v4;
+	__u32 peer_v4;
+	void *local_v6;
+	void *peer_v6;
+	__u16 peer_port /* big-endian */;
+	__s32 ifindex;
+};
+
+static inline struct fou_add_req *fou_add_req_alloc(void)
+{
+	return calloc(1, sizeof(struct fou_add_req));
+}
+void fou_add_req_free(struct fou_add_req *req);
+
+static inline void
+fou_add_req_set_port(struct fou_add_req *req, __u16 port /* big-endian */)
+{
+	req->_present.port = 1;
+	req->port = port;
+}
+static inline void
+fou_add_req_set_ipproto(struct fou_add_req *req, __u8 ipproto)
+{
+	req->_present.ipproto = 1;
+	req->ipproto = ipproto;
+}
+static inline void fou_add_req_set_type(struct fou_add_req *req, __u8 type)
+{
+	req->_present.type = 1;
+	req->type = type;
+}
+static inline void fou_add_req_set_remcsum_nopartial(struct fou_add_req *req)
+{
+	req->_present.remcsum_nopartial = 1;
+}
+static inline void
+fou_add_req_set_local_v4(struct fou_add_req *req, __u32 local_v4)
+{
+	req->_present.local_v4 = 1;
+	req->local_v4 = local_v4;
+}
+static inline void
+fou_add_req_set_peer_v4(struct fou_add_req *req, __u32 peer_v4)
+{
+	req->_present.peer_v4 = 1;
+	req->peer_v4 = peer_v4;
+}
+static inline void
+fou_add_req_set_local_v6(struct fou_add_req *req, const void *local_v6,
+			 size_t len)
+{
+	free(req->local_v6);
+	req->local_v6 = malloc(req->_present.local_v6_len);
+	memcpy(req->local_v6, local_v6, req->_present.local_v6_len);
+}
+static inline void
+fou_add_req_set_peer_v6(struct fou_add_req *req, const void *peer_v6,
+			size_t len)
+{
+	free(req->peer_v6);
+	req->peer_v6 = malloc(req->_present.peer_v6_len);
+	memcpy(req->peer_v6, peer_v6, req->_present.peer_v6_len);
+}
+static inline void
+fou_add_req_set_peer_port(struct fou_add_req *req,
+			  __u16 peer_port /* big-endian */)
+{
+	req->_present.peer_port = 1;
+	req->peer_port = peer_port;
+}
+static inline void
+fou_add_req_set_ifindex(struct fou_add_req *req, __s32 ifindex)
+{
+	req->_present.ifindex = 1;
+	req->ifindex = ifindex;
+}
+
+/*
+ * Add port.
+ */
+int fou_add(struct ynl_sock *ys, struct fou_add_req *req);
+
+/* ============== FOU_CMD_DEL ============== */
+/* FOU_CMD_DEL - do */
+struct fou_del_req {
+	struct {
+		__u32 af:1;
+		__u32 ifindex:1;
+		__u32 port:1;
+		__u32 peer_port:1;
+		__u32 local_v4:1;
+		__u32 peer_v4:1;
+		__u32 local_v6_len;
+		__u32 peer_v6_len;
+	} _present;
+
+	__u8 af;
+	__s32 ifindex;
+	__u16 port /* big-endian */;
+	__u16 peer_port /* big-endian */;
+	__u32 local_v4;
+	__u32 peer_v4;
+	void *local_v6;
+	void *peer_v6;
+};
+
+static inline struct fou_del_req *fou_del_req_alloc(void)
+{
+	return calloc(1, sizeof(struct fou_del_req));
+}
+void fou_del_req_free(struct fou_del_req *req);
+
+static inline void fou_del_req_set_af(struct fou_del_req *req, __u8 af)
+{
+	req->_present.af = 1;
+	req->af = af;
+}
+static inline void
+fou_del_req_set_ifindex(struct fou_del_req *req, __s32 ifindex)
+{
+	req->_present.ifindex = 1;
+	req->ifindex = ifindex;
+}
+static inline void
+fou_del_req_set_port(struct fou_del_req *req, __u16 port /* big-endian */)
+{
+	req->_present.port = 1;
+	req->port = port;
+}
+static inline void
+fou_del_req_set_peer_port(struct fou_del_req *req,
+			  __u16 peer_port /* big-endian */)
+{
+	req->_present.peer_port = 1;
+	req->peer_port = peer_port;
+}
+static inline void
+fou_del_req_set_local_v4(struct fou_del_req *req, __u32 local_v4)
+{
+	req->_present.local_v4 = 1;
+	req->local_v4 = local_v4;
+}
+static inline void
+fou_del_req_set_peer_v4(struct fou_del_req *req, __u32 peer_v4)
+{
+	req->_present.peer_v4 = 1;
+	req->peer_v4 = peer_v4;
+}
+static inline void
+fou_del_req_set_local_v6(struct fou_del_req *req, const void *local_v6,
+			 size_t len)
+{
+	free(req->local_v6);
+	req->local_v6 = malloc(req->_present.local_v6_len);
+	memcpy(req->local_v6, local_v6, req->_present.local_v6_len);
+}
+static inline void
+fou_del_req_set_peer_v6(struct fou_del_req *req, const void *peer_v6,
+			size_t len)
+{
+	free(req->peer_v6);
+	req->peer_v6 = malloc(req->_present.peer_v6_len);
+	memcpy(req->peer_v6, peer_v6, req->_present.peer_v6_len);
+}
+
+/*
+ * Delete port.
+ */
+int fou_del(struct ynl_sock *ys, struct fou_del_req *req);
+
+/* ============== FOU_CMD_GET ============== */
+/* FOU_CMD_GET - do */
+struct fou_get_req {
+	struct {
+		__u32 af:1;
+		__u32 ifindex:1;
+		__u32 port:1;
+		__u32 peer_port:1;
+		__u32 local_v4:1;
+		__u32 peer_v4:1;
+		__u32 local_v6_len;
+		__u32 peer_v6_len;
+	} _present;
+
+	__u8 af;
+	__s32 ifindex;
+	__u16 port /* big-endian */;
+	__u16 peer_port /* big-endian */;
+	__u32 local_v4;
+	__u32 peer_v4;
+	void *local_v6;
+	void *peer_v6;
+};
+
+static inline struct fou_get_req *fou_get_req_alloc(void)
+{
+	return calloc(1, sizeof(struct fou_get_req));
+}
+void fou_get_req_free(struct fou_get_req *req);
+
+static inline void fou_get_req_set_af(struct fou_get_req *req, __u8 af)
+{
+	req->_present.af = 1;
+	req->af = af;
+}
+static inline void
+fou_get_req_set_ifindex(struct fou_get_req *req, __s32 ifindex)
+{
+	req->_present.ifindex = 1;
+	req->ifindex = ifindex;
+}
+static inline void
+fou_get_req_set_port(struct fou_get_req *req, __u16 port /* big-endian */)
+{
+	req->_present.port = 1;
+	req->port = port;
+}
+static inline void
+fou_get_req_set_peer_port(struct fou_get_req *req,
+			  __u16 peer_port /* big-endian */)
+{
+	req->_present.peer_port = 1;
+	req->peer_port = peer_port;
+}
+static inline void
+fou_get_req_set_local_v4(struct fou_get_req *req, __u32 local_v4)
+{
+	req->_present.local_v4 = 1;
+	req->local_v4 = local_v4;
+}
+static inline void
+fou_get_req_set_peer_v4(struct fou_get_req *req, __u32 peer_v4)
+{
+	req->_present.peer_v4 = 1;
+	req->peer_v4 = peer_v4;
+}
+static inline void
+fou_get_req_set_local_v6(struct fou_get_req *req, const void *local_v6,
+			 size_t len)
+{
+	free(req->local_v6);
+	req->local_v6 = malloc(req->_present.local_v6_len);
+	memcpy(req->local_v6, local_v6, req->_present.local_v6_len);
+}
+static inline void
+fou_get_req_set_peer_v6(struct fou_get_req *req, const void *peer_v6,
+			size_t len)
+{
+	free(req->peer_v6);
+	req->peer_v6 = malloc(req->_present.peer_v6_len);
+	memcpy(req->peer_v6, peer_v6, req->_present.peer_v6_len);
+}
+
+struct fou_get_rsp {
+	struct {
+		__u32 port:1;
+		__u32 ipproto:1;
+		__u32 type:1;
+		__u32 remcsum_nopartial:1;
+		__u32 local_v4:1;
+		__u32 peer_v4:1;
+		__u32 local_v6_len;
+		__u32 peer_v6_len;
+		__u32 peer_port:1;
+		__u32 ifindex:1;
+	} _present;
+
+	__u16 port /* big-endian */;
+	__u8 ipproto;
+	__u8 type;
+	__u32 local_v4;
+	__u32 peer_v4;
+	void *local_v6;
+	void *peer_v6;
+	__u16 peer_port /* big-endian */;
+	__s32 ifindex;
+};
+
+void fou_get_rsp_free(struct fou_get_rsp *rsp);
+
+/*
+ * Get tunnel info.
+ */
+struct fou_get_rsp *fou_get(struct ynl_sock *ys, struct fou_get_req *req);
+
+/* FOU_CMD_GET - dump */
+struct fou_get_list {
+	struct fou_get_list *next;
+	struct fou_get_rsp obj __attribute__ ((aligned (8)));
+};
+
+void fou_get_list_free(struct fou_get_list *rsp);
+
+struct fou_get_list *fou_get_dump(struct ynl_sock *ys);
+
+#endif /* _LINUX_FOU_GEN_H */