[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/decnet/dn_rules.c b/src/kernel/linux/v4.14/net/decnet/dn_rules.c
new file mode 100644
index 0000000..c795c3f
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/decnet/dn_rules.c
@@ -0,0 +1,257 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * DECnet An implementation of the DECnet protocol suite for the LINUX
+ * operating system. DECnet is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * DECnet Routing Forwarding Information Base (Rules)
+ *
+ * Author: Steve Whitehouse <SteveW@ACM.org>
+ * Mostly copied from Alexey Kuznetsov's ipv4/fib_rules.c
+ *
+ *
+ * Changes:
+ * Steve Whitehouse <steve@chygwyn.com>
+ * Updated for Thomas Graf's generic rules
+ *
+ */
+#include <linux/net.h>
+#include <linux/init.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/export.h>
+#include <net/neighbour.h>
+#include <net/dst.h>
+#include <net/flow.h>
+#include <net/fib_rules.h>
+#include <net/dn.h>
+#include <net/dn_fib.h>
+#include <net/dn_neigh.h>
+#include <net/dn_dev.h>
+#include <net/dn_route.h>
+
+static struct fib_rules_ops *dn_fib_rules_ops;
+
+struct dn_fib_rule
+{
+ struct fib_rule common;
+ unsigned char dst_len;
+ unsigned char src_len;
+ __le16 src;
+ __le16 srcmask;
+ __le16 dst;
+ __le16 dstmask;
+ __le16 srcmap;
+ u8 flags;
+};
+
+
+int dn_fib_lookup(struct flowidn *flp, struct dn_fib_res *res)
+{
+ struct fib_lookup_arg arg = {
+ .result = res,
+ };
+ int err;
+
+ err = fib_rules_lookup(dn_fib_rules_ops,
+ flowidn_to_flowi(flp), 0, &arg);
+ res->r = arg.rule;
+
+ return err;
+}
+
+static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp,
+ int flags, struct fib_lookup_arg *arg)
+{
+ struct flowidn *fld = &flp->u.dn;
+ int err = -EAGAIN;
+ struct dn_fib_table *tbl;
+
+ switch(rule->action) {
+ case FR_ACT_TO_TBL:
+ break;
+
+ case FR_ACT_UNREACHABLE:
+ err = -ENETUNREACH;
+ goto errout;
+
+ case FR_ACT_PROHIBIT:
+ err = -EACCES;
+ goto errout;
+
+ case FR_ACT_BLACKHOLE:
+ default:
+ err = -EINVAL;
+ goto errout;
+ }
+
+ tbl = dn_fib_get_table(rule->table, 0);
+ if (tbl == NULL)
+ goto errout;
+
+ err = tbl->lookup(tbl, fld, (struct dn_fib_res *)arg->result);
+ if (err > 0)
+ err = -EAGAIN;
+errout:
+ return err;
+}
+
+static const struct nla_policy dn_fib_rule_policy[FRA_MAX+1] = {
+ FRA_GENERIC_POLICY,
+};
+
+static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
+{
+ struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
+ struct flowidn *fld = &fl->u.dn;
+ __le16 daddr = fld->daddr;
+ __le16 saddr = fld->saddr;
+
+ if (((saddr ^ r->src) & r->srcmask) ||
+ ((daddr ^ r->dst) & r->dstmask))
+ return 0;
+
+ return 1;
+}
+
+static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
+ struct fib_rule_hdr *frh,
+ struct nlattr **tb)
+{
+ int err = -EINVAL;
+ struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
+
+ if (frh->tos)
+ goto errout;
+
+ if (rule->table == RT_TABLE_UNSPEC) {
+ if (rule->action == FR_ACT_TO_TBL) {
+ struct dn_fib_table *table;
+
+ table = dn_fib_empty_table();
+ if (table == NULL) {
+ err = -ENOBUFS;
+ goto errout;
+ }
+
+ rule->table = table->n;
+ }
+ }
+
+ if (frh->src_len)
+ r->src = nla_get_le16(tb[FRA_SRC]);
+
+ if (frh->dst_len)
+ r->dst = nla_get_le16(tb[FRA_DST]);
+
+ r->src_len = frh->src_len;
+ r->srcmask = dnet_make_mask(r->src_len);
+ r->dst_len = frh->dst_len;
+ r->dstmask = dnet_make_mask(r->dst_len);
+ err = 0;
+errout:
+ return err;
+}
+
+static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
+ struct nlattr **tb)
+{
+ struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
+
+ if (frh->src_len && (r->src_len != frh->src_len))
+ return 0;
+
+ if (frh->dst_len && (r->dst_len != frh->dst_len))
+ return 0;
+
+ if (frh->src_len && (r->src != nla_get_le16(tb[FRA_SRC])))
+ return 0;
+
+ if (frh->dst_len && (r->dst != nla_get_le16(tb[FRA_DST])))
+ return 0;
+
+ return 1;
+}
+
+unsigned int dnet_addr_type(__le16 addr)
+{
+ struct flowidn fld = { .daddr = addr };
+ struct dn_fib_res res;
+ unsigned int ret = RTN_UNICAST;
+ struct dn_fib_table *tb = dn_fib_get_table(RT_TABLE_LOCAL, 0);
+
+ res.r = NULL;
+
+ if (tb) {
+ if (!tb->lookup(tb, &fld, &res)) {
+ ret = res.type;
+ dn_fib_res_put(&res);
+ }
+ }
+ return ret;
+}
+
+static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
+ struct fib_rule_hdr *frh)
+{
+ struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
+
+ frh->dst_len = r->dst_len;
+ frh->src_len = r->src_len;
+ frh->tos = 0;
+
+ if ((r->dst_len &&
+ nla_put_le16(skb, FRA_DST, r->dst)) ||
+ (r->src_len &&
+ nla_put_le16(skb, FRA_SRC, r->src)))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -ENOBUFS;
+}
+
+static void dn_fib_rule_flush_cache(struct fib_rules_ops *ops)
+{
+ dn_rt_cache_flush(-1);
+}
+
+static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
+ .family = AF_DECnet,
+ .rule_size = sizeof(struct dn_fib_rule),
+ .addr_size = sizeof(u16),
+ .action = dn_fib_rule_action,
+ .match = dn_fib_rule_match,
+ .configure = dn_fib_rule_configure,
+ .compare = dn_fib_rule_compare,
+ .fill = dn_fib_rule_fill,
+ .flush_cache = dn_fib_rule_flush_cache,
+ .nlgroup = RTNLGRP_DECnet_RULE,
+ .policy = dn_fib_rule_policy,
+ .owner = THIS_MODULE,
+ .fro_net = &init_net,
+};
+
+void __init dn_fib_rules_init(void)
+{
+ dn_fib_rules_ops =
+ fib_rules_register(&dn_fib_rules_ops_template, &init_net);
+ BUG_ON(IS_ERR(dn_fib_rules_ops));
+ BUG_ON(fib_default_rule_add(dn_fib_rules_ops, 0x7fff,
+ RT_TABLE_MAIN, 0));
+}
+
+void __exit dn_fib_rules_cleanup(void)
+{
+ rtnl_lock();
+ fib_rules_unregister(dn_fib_rules_ops);
+ rtnl_unlock();
+ rcu_barrier();
+}
+
+