cec771d646
sock->sk_dst_cache is protected by RCU, therefore we should use __sk_dst_get() to deref it once we lock the sock. This fixes several sparse warnings. Cc: linux-decnet-user@lists.sourceforge.net Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
119 lines
4.3 KiB
C
119 lines
4.3 KiB
C
#ifndef _NET_DN_ROUTE_H
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#define _NET_DN_ROUTE_H
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/******************************************************************************
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(c) 1995-1998 E.M. Serrat emserrat@geocities.com
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*******************************************************************************/
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extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
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extern int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *, struct sock *sk, int flags);
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extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
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extern void dn_rt_cache_flush(int delay);
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/* Masks for flags field */
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#define DN_RT_F_PID 0x07 /* Mask for packet type */
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#define DN_RT_F_PF 0x80 /* Padding Follows */
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#define DN_RT_F_VER 0x40 /* Version =0 discard packet if ==1 */
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#define DN_RT_F_IE 0x20 /* Intra Ethernet, Reserved in short pkt */
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#define DN_RT_F_RTS 0x10 /* Packet is being returned to sender */
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#define DN_RT_F_RQR 0x08 /* Return packet to sender upon non-delivery */
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/* Mask for types of routing packets */
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#define DN_RT_PKT_MSK 0x06
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/* Types of routing packets */
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#define DN_RT_PKT_SHORT 0x02 /* Short routing packet */
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#define DN_RT_PKT_LONG 0x06 /* Long routing packet */
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/* Mask for control/routing selection */
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#define DN_RT_PKT_CNTL 0x01 /* Set to 1 if a control packet */
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/* Types of control packets */
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#define DN_RT_CNTL_MSK 0x0f /* Mask for control packets */
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#define DN_RT_PKT_INIT 0x01 /* Initialisation packet */
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#define DN_RT_PKT_VERI 0x03 /* Verification Message */
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#define DN_RT_PKT_HELO 0x05 /* Hello and Test Message */
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#define DN_RT_PKT_L1RT 0x07 /* Level 1 Routing Message */
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#define DN_RT_PKT_L2RT 0x09 /* Level 2 Routing Message */
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#define DN_RT_PKT_ERTH 0x0b /* Ethernet Router Hello */
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#define DN_RT_PKT_EEDH 0x0d /* Ethernet EndNode Hello */
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/* Values for info field in hello message */
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#define DN_RT_INFO_TYPE 0x03 /* Type mask */
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#define DN_RT_INFO_L1RT 0x02 /* L1 Router */
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#define DN_RT_INFO_L2RT 0x01 /* L2 Router */
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#define DN_RT_INFO_ENDN 0x03 /* EndNode */
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#define DN_RT_INFO_VERI 0x04 /* Verification Reqd. */
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#define DN_RT_INFO_RJCT 0x08 /* Reject Flag, Reserved */
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#define DN_RT_INFO_VFLD 0x10 /* Verification Failed, Reserved */
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#define DN_RT_INFO_NOML 0x20 /* No Multicast traffic accepted */
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#define DN_RT_INFO_BLKR 0x40 /* Blocking Requested */
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/*
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* The fl structure is what we used to look up the route.
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* The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
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* except for local input routes, where the rt_saddr = fl.fld_dst and
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* rt_daddr = fl.fld_src to allow the route to be used for returning
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* packets to the originating host.
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*/
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struct dn_route {
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struct dst_entry dst;
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struct neighbour *n;
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struct flowidn fld;
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__le16 rt_saddr;
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__le16 rt_daddr;
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__le16 rt_gateway;
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__le16 rt_local_src; /* Source used for forwarding packets */
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__le16 rt_src_map;
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__le16 rt_dst_map;
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unsigned int rt_flags;
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unsigned int rt_type;
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};
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static inline bool dn_is_input_route(struct dn_route *rt)
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{
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return rt->fld.flowidn_iif != 0;
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}
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static inline bool dn_is_output_route(struct dn_route *rt)
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{
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return rt->fld.flowidn_iif == 0;
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}
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extern void dn_route_init(void);
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extern void dn_route_cleanup(void);
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#include <net/sock.h>
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#include <linux/if_arp.h>
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static inline void dn_rt_send(struct sk_buff *skb)
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{
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dev_queue_xmit(skb);
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}
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static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src)
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{
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struct net_device *dev = skb->dev;
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if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
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dst = NULL;
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if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0)
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dn_rt_send(skb);
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else
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kfree_skb(skb);
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}
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#endif /* _NET_DN_ROUTE_H */
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