Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 199 insertions, 0 deletions

diff --git a/include/net/dn_dev.h b/include/net/dn_dev.h
new file mode 100644
index 000000000..595b4f6c1
--- /dev/null
+++ b/include/net/dn_dev.h
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_DN_DEV_H
+#define _NET_DN_DEV_H
+
+
+struct dn_dev;
+
+struct dn_ifaddr {
+	struct dn_ifaddr __rcu *ifa_next;
+	struct dn_dev    *ifa_dev;
+	__le16            ifa_local;
+	__le16            ifa_address;
+	__u32             ifa_flags;
+	__u8              ifa_scope;
+	char              ifa_label[IFNAMSIZ];
+	struct rcu_head   rcu;
+};
+
+#define DN_DEV_S_RU  0 /* Run - working normally   */
+#define DN_DEV_S_CR  1 /* Circuit Rejected         */
+#define DN_DEV_S_DS  2 /* Data Link Start          */
+#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
+#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
+#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
+#define DN_DEV_S_OF  6 /* Off                      */
+#define DN_DEV_S_HA  7 /* Halt                     */
+
+
+/*
+ * The dn_dev_parms structure contains the set of parameters
+ * for each device (hence inclusion in the dn_dev structure)
+ * and an array is used to store the default types of supported
+ * device (in dn_dev.c).
+ *
+ * The type field matches the ARPHRD_ constants and is used in
+ * searching the list for supported devices when new devices
+ * come up.
+ *
+ * The mode field is used to find out if a device is broadcast,
+ * multipoint, or pointopoint. Please note that DECnet thinks
+ * different ways about devices to the rest of the kernel
+ * so the normal IFF_xxx flags are invalid here. For devices
+ * which can be any combination of the previously mentioned
+ * attributes, you can set this on a per device basis by
+ * installing an up() routine.
+ *
+ * The device state field, defines the initial state in which the
+ * device will come up. In the dn_dev structure, it is the actual
+ * state.
+ *
+ * Things have changed here. I've killed timer1 since it's a user space
+ * issue for a user space routing deamon to sort out. The kernel does
+ * not need to be bothered with it.
+ *
+ * Timers:
+ * t2 - Rate limit timer, min time between routing and hello messages
+ * t3 - Hello timer, send hello messages when it expires
+ *
+ * Callbacks:
+ * up() - Called to initialize device, return value can veto use of
+ *        device with DECnet.
+ * down() - Called to turn device off when it goes down
+ * timer3() - Called once for each ifaddr when timer 3 goes off
+ * 
+ * sysctl - Hook for sysctl things
+ *
+ */
+struct dn_dev_parms {
+	int type;	          /* ARPHRD_xxx                         */
+	int mode;	          /* Broadcast, Unicast, Mulitpoint     */
+#define DN_DEV_BCAST  1
+#define DN_DEV_UCAST  2
+#define DN_DEV_MPOINT 4
+	int state;                /* Initial state                      */
+	int forwarding;	          /* 0=EndNode, 1=L1Router, 2=L2Router  */
+	unsigned long t2;         /* Default value of t2                */
+	unsigned long t3;         /* Default value of t3                */
+	int priority;             /* Priority to be a router            */
+	char *name;               /* Name for sysctl                    */
+	int  (*up)(struct net_device *);
+	void (*down)(struct net_device *);
+	void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
+	void *sysctl;
+};
+
+
+struct dn_dev {
+	struct dn_ifaddr __rcu *ifa_list;
+	struct net_device *dev;
+	struct dn_dev_parms parms;
+	char use_long;
+	struct timer_list timer;
+	unsigned long t3;
+	struct neigh_parms *neigh_parms;
+	__u8 addr[ETH_ALEN];
+	struct neighbour *router; /* Default router on circuit */
+	struct neighbour *peer;   /* Peer on pointopoint links */
+	unsigned long uptime;     /* Time device went up in jiffies */
+};
+
+struct dn_short_packet {
+	__u8    msgflg;
+	__le16 dstnode;
+	__le16 srcnode;
+	__u8   forward;
+} __packed;
+
+struct dn_long_packet {
+	__u8   msgflg;
+	__u8   d_area;
+	__u8   d_subarea;
+	__u8   d_id[6];
+	__u8   s_area;
+	__u8   s_subarea;
+	__u8   s_id[6];
+	__u8   nl2;
+	__u8   visit_ct;
+	__u8   s_class;
+	__u8   pt;
+} __packed;
+
+/*------------------------- DRP - Routing messages ---------------------*/
+
+struct endnode_hello_message {
+	__u8   msgflg;
+	__u8   tiver[3];
+	__u8   id[6];
+	__u8   iinfo;
+	__le16 blksize;
+	__u8   area;
+	__u8   seed[8];
+	__u8   neighbor[6];
+	__le16 timer;
+	__u8   mpd;
+	__u8   datalen;
+	__u8   data[2];
+} __packed;
+
+struct rtnode_hello_message {
+	__u8   msgflg;
+	__u8   tiver[3];
+	__u8   id[6];
+	__u8   iinfo;
+	__le16  blksize;
+	__u8   priority;
+	__u8   area;
+	__le16  timer;
+	__u8   mpd;
+} __packed;
+
+
+void dn_dev_init(void);
+void dn_dev_cleanup(void);
+
+int dn_dev_ioctl(unsigned int cmd, void __user *arg);
+
+void dn_dev_devices_off(void);
+void dn_dev_devices_on(void);
+
+void dn_dev_init_pkt(struct sk_buff *skb);
+void dn_dev_veri_pkt(struct sk_buff *skb);
+void dn_dev_hello(struct sk_buff *skb);
+
+void dn_dev_up(struct net_device *);
+void dn_dev_down(struct net_device *);
+
+int dn_dev_set_default(struct net_device *dev, int force);
+struct net_device *dn_dev_get_default(void);
+int dn_dev_bind_default(__le16 *addr);
+
+int register_dnaddr_notifier(struct notifier_block *nb);
+int unregister_dnaddr_notifier(struct notifier_block *nb);
+
+static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
+{
+	struct dn_dev *dn_db;
+	struct dn_ifaddr *ifa;
+	int res = 0;
+
+	rcu_read_lock();
+	dn_db = rcu_dereference(dev->dn_ptr);
+	if (dn_db == NULL) {
+		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
+		goto out;
+	}
+
+	for (ifa = rcu_dereference(dn_db->ifa_list);
+	     ifa != NULL;
+	     ifa = rcu_dereference(ifa->ifa_next))
+		if ((addr ^ ifa->ifa_local) == 0) {
+			res = 1;
+			break;
+		}
+out:
+	rcu_read_unlock();
+	return res;
+}
+
+#endif /* _NET_DN_DEV_H */