Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 268 insertions, 0 deletions

diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h
new file mode 100644
index 000000000..bd0cc5c28
--- /dev/null
+++ b/net/tipc/bearer.h
@@ -0,0 +1,268 @@
+/*
+ * net/tipc/bearer.h: Include file for TIPC bearer code
+ *
+ * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
+ * Copyright (c) 2005, 2010-2011, Wind River Systems
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TIPC_BEARER_H
+#define _TIPC_BEARER_H
+
+#include "netlink.h"
+#include "core.h"
+#include "msg.h"
+#include <net/genetlink.h>
+
+#define MAX_MEDIA	3
+
+/* Identifiers associated with TIPC message header media address info
+ * - address info field is 32 bytes long
+ * - the field's actual content and length is defined per media
+ * - remaining unused bytes in the field are set to zero
+ */
+#define TIPC_MEDIA_INFO_SIZE	32
+#define TIPC_MEDIA_TYPE_OFFSET	3
+#define TIPC_MEDIA_ADDR_OFFSET	4
+
+/*
+ * Identifiers of supported TIPC media types
+ */
+#define TIPC_MEDIA_TYPE_ETH	1
+#define TIPC_MEDIA_TYPE_IB	2
+#define TIPC_MEDIA_TYPE_UDP	3
+
+/* Minimum bearer MTU */
+#define TIPC_MIN_BEARER_MTU	(MAX_H_SIZE + INT_H_SIZE)
+
+/* Identifiers for distinguishing between broadcast/multicast and replicast
+ */
+#define TIPC_BROADCAST_SUPPORT  1
+#define TIPC_REPLICAST_SUPPORT  2
+
+/**
+ * struct tipc_media_addr - destination address used by TIPC bearers
+ * @value: address info (format defined by media)
+ * @media_id: TIPC media type identifier
+ * @broadcast: non-zero if address is a broadcast address
+ */
+struct tipc_media_addr {
+	u8 value[TIPC_MEDIA_INFO_SIZE];
+	u8 media_id;
+	u8 broadcast;
+};
+
+struct tipc_bearer;
+
+/**
+ * struct tipc_media - Media specific info exposed to generic bearer layer
+ * @send_msg: routine which handles buffer transmission
+ * @enable_media: routine which enables a media
+ * @disable_media: routine which disables a media
+ * @addr2str: convert media address format to string
+ * @addr2msg: convert from media addr format to discovery msg addr format
+ * @msg2addr: convert from discovery msg addr format to media addr format
+ * @raw2addr: convert from raw addr format to media addr format
+ * @priority: default link (and bearer) priority
+ * @tolerance: default time (in ms) before declaring link failure
+ * @min_win: minimum window (in packets) before declaring link congestion
+ * @max_win: maximum window (in packets) before declaring link congestion
+ * @mtu: max packet size bearer can support for media type not dependent on
+ * underlying device MTU
+ * @type_id: TIPC media identifier
+ * @hwaddr_len: TIPC media address len
+ * @name: media name
+ */
+struct tipc_media {
+	int (*send_msg)(struct net *net, struct sk_buff *buf,
+			struct tipc_bearer *b,
+			struct tipc_media_addr *dest);
+	int (*enable_media)(struct net *net, struct tipc_bearer *b,
+			    struct nlattr *attr[]);
+	void (*disable_media)(struct tipc_bearer *b);
+	int (*addr2str)(struct tipc_media_addr *addr,
+			char *strbuf,
+			int bufsz);
+	int (*addr2msg)(char *msg, struct tipc_media_addr *addr);
+	int (*msg2addr)(struct tipc_bearer *b,
+			struct tipc_media_addr *addr,
+			char *msg);
+	int (*raw2addr)(struct tipc_bearer *b,
+			struct tipc_media_addr *addr,
+			const char *raw);
+	u32 priority;
+	u32 tolerance;
+	u32 min_win;
+	u32 max_win;
+	u32 mtu;
+	u32 type_id;
+	u32 hwaddr_len;
+	char name[TIPC_MAX_MEDIA_NAME];
+};
+
+/**
+ * struct tipc_bearer - Generic TIPC bearer structure
+ * @media_ptr: pointer to additional media-specific information about bearer
+ * @mtu: max packet size bearer can support
+ * @addr: media-specific address associated with bearer
+ * @name: bearer name (format = media:interface)
+ * @media: ptr to media structure associated with bearer
+ * @bcast_addr: media address used in broadcasting
+ * @pt: packet type for bearer
+ * @rcu: rcu struct for tipc_bearer
+ * @priority: default link priority for bearer
+ * @min_win: minimum window (in packets) before declaring link congestion
+ * @max_win: maximum window (in packets) before declaring link congestion
+ * @tolerance: default link tolerance for bearer
+ * @domain: network domain to which links can be established
+ * @identity: array index of this bearer within TIPC bearer array
+ * @disc: ptr to link setup request
+ * @net_plane: network plane ('A' through 'H') currently associated with bearer
+ * @encap_hlen: encap headers length
+ * @up: bearer up flag (bit 0)
+ * @refcnt: tipc_bearer reference counter
+ *
+ * Note: media-specific code is responsible for initialization of the fields
+ * indicated below when a bearer is enabled; TIPC's generic bearer code takes
+ * care of initializing all other fields.
+ */
+struct tipc_bearer {
+	void __rcu *media_ptr;			/* initialized by media */
+	u32 mtu;				/* initialized by media */
+	struct tipc_media_addr addr;		/* initialized by media */
+	char name[TIPC_MAX_BEARER_NAME];
+	struct tipc_media *media;
+	struct tipc_media_addr bcast_addr;
+	struct packet_type pt;
+	struct rcu_head rcu;
+	u32 priority;
+	u32 min_win;
+	u32 max_win;
+	u32 tolerance;
+	u32 domain;
+	u32 identity;
+	struct tipc_discoverer *disc;
+	char net_plane;
+	u16 encap_hlen;
+	unsigned long up;
+	refcount_t refcnt;
+};
+
+struct tipc_bearer_names {
+	char media_name[TIPC_MAX_MEDIA_NAME];
+	char if_name[TIPC_MAX_IF_NAME];
+};
+
+/*
+ * TIPC routines available to supported media types
+ */
+
+void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b);
+
+/*
+ * Routines made available to TIPC by supported media types
+ */
+extern struct tipc_media eth_media_info;
+
+#ifdef CONFIG_TIPC_MEDIA_IB
+extern struct tipc_media ib_media_info;
+#endif
+#ifdef CONFIG_TIPC_MEDIA_UDP
+extern struct tipc_media udp_media_info;
+#endif
+
+int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info);
+int __tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info);
+int __tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb);
+int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
+int __tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info);
+
+int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);
+int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
+int __tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
+
+int tipc_media_set_priority(const char *name, u32 new_value);
+int tipc_media_set_window(const char *name, u32 new_value);
+int tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
+int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
+			 struct nlattr *attrs[]);
+bool tipc_bearer_hold(struct tipc_bearer *b);
+void tipc_bearer_put(struct tipc_bearer *b);
+void tipc_disable_l2_media(struct tipc_bearer *b);
+int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
+		     struct tipc_bearer *b, struct tipc_media_addr *dest);
+
+void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest);
+void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest);
+struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name);
+int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id);
+struct tipc_media *tipc_media_find(const char *name);
+int tipc_bearer_setup(void);
+void tipc_bearer_cleanup(void);
+void tipc_bearer_stop(struct net *net);
+int tipc_bearer_mtu(struct net *net, u32 bearer_id);
+int tipc_bearer_min_mtu(struct net *net, u32 bearer_id);
+bool tipc_bearer_bcast_support(struct net *net, u32 bearer_id);
+void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
+			  struct sk_buff *skb,
+			  struct tipc_media_addr *dest);
+void tipc_bearer_xmit(struct net *net, u32 bearer_id,
+		      struct sk_buff_head *xmitq,
+		      struct tipc_media_addr *dst,
+		      struct tipc_node *__dnode);
+void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
+			 struct sk_buff_head *xmitq);
+void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts);
+int tipc_attach_loopback(struct net *net);
+void tipc_detach_loopback(struct net *net);
+
+static inline void tipc_loopback_trace(struct net *net,
+				       struct sk_buff_head *pkts)
+{
+	if (unlikely(dev_nit_active(net->loopback_dev)))
+		tipc_clone_to_loopback(net, pkts);
+}
+
+/* check if device MTU is too low for tipc headers */
+static inline bool tipc_mtu_bad(struct net_device *dev, unsigned int reserve)
+{
+	if (dev->mtu >= TIPC_MIN_BEARER_MTU + reserve)
+		return false;
+	netdev_warn(dev, "MTU too low for tipc bearer\n");
+	return true;
+}
+
+#endif	/* _TIPC_BEARER_H */