Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 167 insertions, 0 deletions

diff --git a/include/net/dn_fib.h b/include/net/dn_fib.h
new file mode 100644
index 000000000..6dd2213c5
--- /dev/null
+++ b/include/net/dn_fib.h
@@ -0,0 +1,167 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_DN_FIB_H
+#define _NET_DN_FIB_H
+
+#include <linux/netlink.h>
+#include <linux/refcount.h>
+
+extern const struct nla_policy rtm_dn_policy[];
+
+struct dn_fib_res {
+	struct fib_rule *r;
+	struct dn_fib_info *fi;
+	unsigned char prefixlen;
+	unsigned char nh_sel;
+	unsigned char type;
+	unsigned char scope;
+};
+
+struct dn_fib_nh {
+	struct net_device	*nh_dev;
+	unsigned int		nh_flags;
+	unsigned char		nh_scope;
+	int			nh_weight;
+	int			nh_power;
+	int			nh_oif;
+	__le16			nh_gw;
+};
+
+struct dn_fib_info {
+	struct dn_fib_info	*fib_next;
+	struct dn_fib_info	*fib_prev;
+	int 			fib_treeref;
+	refcount_t		fib_clntref;
+	int			fib_dead;
+	unsigned int		fib_flags;
+	int			fib_protocol;
+	__le16			fib_prefsrc;
+	__u32			fib_priority;
+	__u32			fib_metrics[RTAX_MAX];
+	int			fib_nhs;
+	int			fib_power;
+	struct dn_fib_nh	fib_nh[0];
+#define dn_fib_dev		fib_nh[0].nh_dev
+};
+
+
+#define DN_FIB_RES_RESET(res)	((res).nh_sel = 0)
+#define DN_FIB_RES_NH(res)	((res).fi->fib_nh[(res).nh_sel])
+
+#define DN_FIB_RES_PREFSRC(res)	((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
+#define DN_FIB_RES_GW(res)	(DN_FIB_RES_NH(res).nh_gw)
+#define DN_FIB_RES_DEV(res)	(DN_FIB_RES_NH(res).nh_dev)
+#define DN_FIB_RES_OIF(res)	(DN_FIB_RES_NH(res).nh_oif)
+
+typedef struct {
+	__le16	datum;
+} dn_fib_key_t;
+
+typedef struct {
+	__le16	datum;
+} dn_fib_hash_t;
+
+typedef struct {
+	__u16	datum;
+} dn_fib_idx_t;
+
+struct dn_fib_node {
+	struct dn_fib_node *fn_next;
+	struct dn_fib_info *fn_info;
+#define DN_FIB_INFO(f) ((f)->fn_info)
+	dn_fib_key_t	fn_key;
+	u8		fn_type;
+	u8		fn_scope;
+	u8		fn_state;
+};
+
+
+struct dn_fib_table {
+	struct hlist_node hlist;
+	u32 n;
+
+	int (*insert)(struct dn_fib_table *t, struct rtmsg *r, 
+			struct nlattr *attrs[], struct nlmsghdr *n,
+			struct netlink_skb_parms *req);
+	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
+			struct nlattr *attrs[], struct nlmsghdr *n,
+			struct netlink_skb_parms *req);
+	int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
+			struct dn_fib_res *res);
+	int (*flush)(struct dn_fib_table *t);
+	int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
+
+	unsigned char data[0];
+};
+
+#ifdef CONFIG_DECNET_ROUTER
+/*
+ * dn_fib.c
+ */
+void dn_fib_init(void);
+void dn_fib_cleanup(void);
+
+int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
+				       struct nlattr *attrs[],
+				       const struct nlmsghdr *nlh, int *errp);
+int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
+			  const struct flowidn *fld, struct dn_fib_res *res);
+void dn_fib_release_info(struct dn_fib_info *fi);
+void dn_fib_flush(void);
+void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
+
+/*
+ * dn_tables.c
+ */
+struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
+struct dn_fib_table *dn_fib_empty_table(void);
+void dn_fib_table_init(void);
+void dn_fib_table_cleanup(void);
+
+/*
+ * dn_rules.c
+ */
+void dn_fib_rules_init(void);
+void dn_fib_rules_cleanup(void);
+unsigned int dnet_addr_type(__le16 addr);
+int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
+
+int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
+
+void dn_fib_free_info(struct dn_fib_info *fi);
+
+static inline void dn_fib_info_put(struct dn_fib_info *fi)
+{
+	if (refcount_dec_and_test(&fi->fib_clntref))
+		dn_fib_free_info(fi);
+}
+
+static inline void dn_fib_res_put(struct dn_fib_res *res)
+{
+	if (res->fi)
+		dn_fib_info_put(res->fi);
+	if (res->r)
+		fib_rule_put(res->r);
+}
+
+#else /* Endnode */
+
+#define dn_fib_init()  do { } while(0)
+#define dn_fib_cleanup() do { } while(0)
+
+#define dn_fib_lookup(fl, res) (-ESRCH)
+#define dn_fib_info_put(fi) do { } while(0)
+#define dn_fib_select_multipath(fl, res) do { } while(0)
+#define dn_fib_rules_policy(saddr,res,flags) (0)
+#define dn_fib_res_put(res) do { } while(0)
+
+#endif /* CONFIG_DECNET_ROUTER */
+
+static inline __le16 dnet_make_mask(int n)
+{
+	if (n)
+		return cpu_to_le16(~((1 << (16 - n)) - 1));
+	return cpu_to_le16(0);
+}
+
+#endif /* _NET_DN_FIB_H */