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net/decnet/dn_route.c
45.9 KB
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/* * 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 Functions (Endnode and Router) * * Authors: Steve Whitehouse <SteveW@ACM.org> * Eduardo Marcelo Serrat <emserrat@geocities.com> * * Changes: * Steve Whitehouse : Fixes to allow "intra-ethernet" and * "return-to-sender" bits on outgoing * packets. * Steve Whitehouse : Timeouts for cached routes. * Steve Whitehouse : Use dst cache for input routes too. * Steve Whitehouse : Fixed error values in dn_send_skb. * Steve Whitehouse : Rework routing functions to better fit * DECnet routing design * Alexey Kuznetsov : New SMP locking * Steve Whitehouse : More SMP locking changes & dn_cache_dump() * Steve Whitehouse : Prerouting NF hook, now really is prerouting. * Fixed possible skb leak in rtnetlink funcs. * Steve Whitehouse : Dave Miller's dynamic hash table sizing and * Alexey Kuznetsov's finer grained locking * from ipv4/route.c. * Steve Whitehouse : Routing is now starting to look like a * sensible set of code now, mainly due to * my copying the IPv4 routing code. The * hooks here are modified and will continue * to evolve for a while. * Steve Whitehouse : Real SMP at last :-) Also new netfilter * stuff. Look out raw sockets your days * are numbered! * Steve Whitehouse : Added return-to-sender functions. Added * backlog congestion level return codes. * Steve Whitehouse : Fixed bug where routes were set up with * no ref count on net devices. * Steve Whitehouse : RCU for the route cache * Steve Whitehouse : Preparations for the flow cache * Steve Whitehouse : Prepare for nonlinear skbs */ /****************************************************************************** (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 it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. *******************************************************************************/ |
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#include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> #include <linux/kernel.h> #include <linux/sockios.h> #include <linux/net.h> #include <linux/netdevice.h> #include <linux/inet.h> #include <linux/route.h> #include <linux/in_route.h> |
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#include <linux/slab.h> |
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#include <net/sock.h> #include <linux/mm.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/init.h> #include <linux/rtnetlink.h> #include <linux/string.h> #include <linux/netfilter_decnet.h> #include <linux/rcupdate.h> #include <linux/times.h> |
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#include <linux/export.h> |
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#include <asm/errno.h> |
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#include <net/net_namespace.h> |
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#include <net/netlink.h> |
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#include <net/neighbour.h> #include <net/dst.h> #include <net/flow.h> |
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#include <net/fib_rules.h> |
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#include <net/dn.h> #include <net/dn_dev.h> #include <net/dn_nsp.h> #include <net/dn_route.h> #include <net/dn_neigh.h> #include <net/dn_fib.h> struct dn_rt_hash_bucket { |
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struct dn_route __rcu *chain; |
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spinlock_t lock; |
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}; |
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extern struct neigh_table dn_neigh_table; static unsigned char dn_hiord_addr[6] = {0xAA,0x00,0x04,0x00,0x00,0x00}; static const int dn_rt_min_delay = 2 * HZ; static const int dn_rt_max_delay = 10 * HZ; static const int dn_rt_mtu_expires = 10 * 60 * HZ; static unsigned long dn_rt_deadline; |
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static int dn_dst_gc(struct dst_ops *ops); |
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static struct dst_entry *dn_dst_check(struct dst_entry *, __u32); |
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static unsigned int dn_dst_default_advmss(const struct dst_entry *dst); |
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static unsigned int dn_dst_mtu(const struct dst_entry *dst); |
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static void dn_dst_destroy(struct dst_entry *); |
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static struct dst_entry *dn_dst_negative_advice(struct dst_entry *); static void dn_dst_link_failure(struct sk_buff *); static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu); |
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static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, const void *daddr); |
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static int dn_route_input(struct sk_buff *); static void dn_run_flush(unsigned long dummy); static struct dn_rt_hash_bucket *dn_rt_hash_table; static unsigned dn_rt_hash_mask; static struct timer_list dn_route_timer; |
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static DEFINE_TIMER(dn_rt_flush_timer, dn_run_flush, 0, 0); |
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int decnet_dst_gc_interval = 2; static struct dst_ops dn_dst_ops = { .family = PF_DECnet, |
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.protocol = cpu_to_be16(ETH_P_DNA_RT), |
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.gc_thresh = 128, .gc = dn_dst_gc, .check = dn_dst_check, |
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.default_advmss = dn_dst_default_advmss, |
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.mtu = dn_dst_mtu, |
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.cow_metrics = dst_cow_metrics_generic, .destroy = dn_dst_destroy, |
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.negative_advice = dn_dst_negative_advice, .link_failure = dn_dst_link_failure, .update_pmtu = dn_dst_update_pmtu, |
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.neigh_lookup = dn_dst_neigh_lookup, |
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}; |
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static void dn_dst_destroy(struct dst_entry *dst) { dst_destroy_metrics_generic(dst); } |
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static __inline__ unsigned dn_hash(__le16 src, __le16 dst) |
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{ |
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__u16 tmp = (__u16 __force)(src ^ dst); |
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tmp ^= (tmp >> 3); tmp ^= (tmp >> 5); tmp ^= (tmp >> 10); return dn_rt_hash_mask & (unsigned)tmp; } static inline void dnrt_free(struct dn_route *rt) { |
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call_rcu_bh(&rt->dst.rcu_head, dst_rcu_free); |
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} static inline void dnrt_drop(struct dn_route *rt) { |
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dst_release(&rt->dst); call_rcu_bh(&rt->dst.rcu_head, dst_rcu_free); |
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} static void dn_dst_check_expire(unsigned long dummy) { int i; |
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struct dn_route *rt; struct dn_route __rcu **rtp; |
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unsigned long now = jiffies; unsigned long expire = 120 * HZ; |
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for (i = 0; i <= dn_rt_hash_mask; i++) { |
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rtp = &dn_rt_hash_table[i].chain; spin_lock(&dn_rt_hash_table[i].lock); |
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while ((rt = rcu_dereference_protected(*rtp, lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) { |
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if (atomic_read(&rt->dst.__refcnt) || (now - rt->dst.lastuse) < expire) { rtp = &rt->dst.dn_next; |
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continue; } |
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*rtp = rt->dst.dn_next; rt->dst.dn_next = NULL; |
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dnrt_free(rt); } spin_unlock(&dn_rt_hash_table[i].lock); if ((jiffies - now) > 0) break; } mod_timer(&dn_route_timer, now + decnet_dst_gc_interval * HZ); } |
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static int dn_dst_gc(struct dst_ops *ops) |
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{ |
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struct dn_route *rt; struct dn_route __rcu **rtp; |
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int i; unsigned long now = jiffies; unsigned long expire = 10 * HZ; |
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for (i = 0; i <= dn_rt_hash_mask; i++) { |
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spin_lock_bh(&dn_rt_hash_table[i].lock); rtp = &dn_rt_hash_table[i].chain; |
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while ((rt = rcu_dereference_protected(*rtp, lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) { |
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if (atomic_read(&rt->dst.__refcnt) || (now - rt->dst.lastuse) < expire) { rtp = &rt->dst.dn_next; |
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continue; } |
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*rtp = rt->dst.dn_next; rt->dst.dn_next = NULL; |
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dnrt_drop(rt); break; } spin_unlock_bh(&dn_rt_hash_table[i].lock); } return 0; } /* * The decnet standards don't impose a particular minimum mtu, what they * do insist on is that the routing layer accepts a datagram of at least * 230 bytes long. Here we have to subtract the routing header length from * 230 to get the minimum acceptable mtu. If there is no neighbour, then we * assume the worst and use a long header size. * * We update both the mtu and the advertised mss (i.e. the segment size we * advertise to the other end). */ static void dn_dst_update_pmtu(struct dst_entry *dst, u32 mtu) { |
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struct neighbour *n = dst_get_neighbour_noref(dst); |
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u32 min_mtu = 230; |
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struct dn_dev *dn; dn = n ? rcu_dereference_raw(n->dev->dn_ptr) : NULL; |
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if (dn && dn->use_long == 0) min_mtu -= 6; else min_mtu -= 21; |
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if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= min_mtu) { |
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if (!(dst_metric_locked(dst, RTAX_MTU))) { |
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dst_metric_set(dst, RTAX_MTU, mtu); |
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dst_set_expires(dst, dn_rt_mtu_expires); } if (!(dst_metric_locked(dst, RTAX_ADVMSS))) { u32 mss = mtu - DN_MAX_NSP_DATA_HEADER; |
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u32 existing_mss = dst_metric_raw(dst, RTAX_ADVMSS); if (!existing_mss || existing_mss > mss) |
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dst_metric_set(dst, RTAX_ADVMSS, mss); |
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} } } |
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/* |
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* When a route has been marked obsolete. (e.g. routing cache flush) */ static struct dst_entry *dn_dst_check(struct dst_entry *dst, __u32 cookie) { return NULL; } static struct dst_entry *dn_dst_negative_advice(struct dst_entry *dst) { dst_release(dst); return NULL; } static void dn_dst_link_failure(struct sk_buff *skb) { |
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} |
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static inline int compare_keys(struct flowidn *fl1, struct flowidn *fl2) |
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{ |
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return ((fl1->daddr ^ fl2->daddr) | (fl1->saddr ^ fl2->saddr) | (fl1->flowidn_mark ^ fl2->flowidn_mark) | (fl1->flowidn_scope ^ fl2->flowidn_scope) | (fl1->flowidn_oif ^ fl2->flowidn_oif) | (fl1->flowidn_iif ^ fl2->flowidn_iif)) == 0; |
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} static int dn_insert_route(struct dn_route *rt, unsigned hash, struct dn_route **rp) { |
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struct dn_route *rth; struct dn_route __rcu **rthp; |
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unsigned long now = jiffies; rthp = &dn_rt_hash_table[hash].chain; spin_lock_bh(&dn_rt_hash_table[hash].lock); |
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while ((rth = rcu_dereference_protected(*rthp, lockdep_is_held(&dn_rt_hash_table[hash].lock))) != NULL) { |
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if (compare_keys(&rth->fld, &rt->fld)) { |
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/* Put it first */ |
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*rthp = rth->dst.dn_next; rcu_assign_pointer(rth->dst.dn_next, |
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dn_rt_hash_table[hash].chain); rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth); |
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dst_use(&rth->dst, now); |
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spin_unlock_bh(&dn_rt_hash_table[hash].lock); dnrt_drop(rt); *rp = rth; return 0; } |
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rthp = &rth->dst.dn_next; |
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} |
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rcu_assign_pointer(rt->dst.dn_next, dn_rt_hash_table[hash].chain); |
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rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt); |
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|
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dst_use(&rt->dst, now); |
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spin_unlock_bh(&dn_rt_hash_table[hash].lock); *rp = rt; return 0; } |
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static void dn_run_flush(unsigned long dummy) |
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{ int i; struct dn_route *rt, *next; |
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for (i = 0; i < dn_rt_hash_mask; i++) { |
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spin_lock_bh(&dn_rt_hash_table[i].lock); |
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if ((rt = xchg((struct dn_route **)&dn_rt_hash_table[i].chain, NULL)) == NULL) |
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goto nothing_to_declare; |
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for(; rt; rt = next) { next = rcu_dereference_raw(rt->dst.dn_next); RCU_INIT_POINTER(rt->dst.dn_next, NULL); |
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dst_free((struct dst_entry *)rt); } nothing_to_declare: spin_unlock_bh(&dn_rt_hash_table[i].lock); } } static DEFINE_SPINLOCK(dn_rt_flush_lock); void dn_rt_cache_flush(int delay) { unsigned long now = jiffies; int user_mode = !in_interrupt(); if (delay < 0) delay = dn_rt_min_delay; spin_lock_bh(&dn_rt_flush_lock); if (del_timer(&dn_rt_flush_timer) && delay > 0 && dn_rt_deadline) { long tmo = (long)(dn_rt_deadline - now); if (user_mode && tmo < dn_rt_max_delay - dn_rt_min_delay) tmo = 0; if (delay > tmo) delay = tmo; } if (delay <= 0) { spin_unlock_bh(&dn_rt_flush_lock); dn_run_flush(0); return; } if (dn_rt_deadline == 0) dn_rt_deadline = now + dn_rt_max_delay; dn_rt_flush_timer.expires = now + delay; add_timer(&dn_rt_flush_timer); spin_unlock_bh(&dn_rt_flush_lock); } /** * dn_return_short - Return a short packet to its sender * @skb: The packet to return * */ static int dn_return_short(struct sk_buff *skb) { struct dn_skb_cb *cb; unsigned char *ptr; |
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__le16 *src; __le16 *dst; |
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/* Add back headers */ |
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skb_push(skb, skb->data - skb_network_header(skb)); |
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if ((skb = skb_unshare(skb, GFP_ATOMIC)) == NULL) return NET_RX_DROP; cb = DN_SKB_CB(skb); /* Skip packet length and point to flags */ ptr = skb->data + 2; *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS; |
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dst = (__le16 *)ptr; |
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ptr += 2; |
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src = (__le16 *)ptr; |
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ptr += 2; *ptr = 0; /* Zero hop count */ |
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swap(*src, *dst); |
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skb->pkt_type = PACKET_OUTGOING; dn_rt_finish_output(skb, NULL, NULL); return NET_RX_SUCCESS; } /** * dn_return_long - Return a long packet to its sender * @skb: The long format packet to return * */ static int dn_return_long(struct sk_buff *skb) { struct dn_skb_cb *cb; unsigned char *ptr; unsigned char *src_addr, *dst_addr; unsigned char tmp[ETH_ALEN]; /* Add back all headers */ |
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skb_push(skb, skb->data - skb_network_header(skb)); |
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if ((skb = skb_unshare(skb, GFP_ATOMIC)) == NULL) return NET_RX_DROP; cb = DN_SKB_CB(skb); /* Ignore packet length and point to flags */ ptr = skb->data + 2; /* Skip padding */ if (*ptr & DN_RT_F_PF) { char padlen = (*ptr & ~DN_RT_F_PF); ptr += padlen; } *ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS; ptr += 2; dst_addr = ptr; ptr += 8; src_addr = ptr; ptr += 6; *ptr = 0; /* Zero hop count */ /* Swap source and destination */ memcpy(tmp, src_addr, ETH_ALEN); memcpy(src_addr, dst_addr, ETH_ALEN); memcpy(dst_addr, tmp, ETH_ALEN); skb->pkt_type = PACKET_OUTGOING; dn_rt_finish_output(skb, dst_addr, src_addr); return NET_RX_SUCCESS; } /** * dn_route_rx_packet - Try and find a route for an incoming packet * @skb: The packet to find a route for * * Returns: result of input function if route is found, error code otherwise */ static int dn_route_rx_packet(struct sk_buff *skb) { |
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struct dn_skb_cb *cb; |
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int err; if ((err = dn_route_input(skb)) == 0) return dst_input(skb); |
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cb = DN_SKB_CB(skb); |
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if (decnet_debug_level & 4) { char *devname = skb->dev ? skb->dev->name : "???"; |
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|
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printk(KERN_DEBUG "DECnet: dn_route_rx_packet: rt_flags=0x%02x dev=%s len=%d src=0x%04hx dst=0x%04hx err=%d type=%d ", |
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(int)cb->rt_flags, devname, skb->len, |
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le16_to_cpu(cb->src), le16_to_cpu(cb->dst), |
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err, skb->pkt_type); } if ((skb->pkt_type == PACKET_HOST) && (cb->rt_flags & DN_RT_F_RQR)) { |
06f8fe11b decnet: Reduce sw... |
484 485 486 487 488 |
switch (cb->rt_flags & DN_RT_PKT_MSK) { case DN_RT_PKT_SHORT: return dn_return_short(skb); case DN_RT_PKT_LONG: return dn_return_long(skb); |
1da177e4c Linux-2.6.12-rc2 |
489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 |
} } kfree_skb(skb); return NET_RX_DROP; } static int dn_route_rx_long(struct sk_buff *skb) { struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned char *ptr = skb->data; if (!pskb_may_pull(skb, 21)) /* 20 for long header, 1 for shortest nsp */ goto drop_it; skb_pull(skb, 20); |
badff6d01 [SK_BUFF]: Introd... |
505 |
skb_reset_transport_header(skb); |
1da177e4c Linux-2.6.12-rc2 |
506 |
|
429eb0fae [NET] DECNET: Fix... |
507 508 |
/* Destination info */ ptr += 2; |
c4ea94ab3 [DECnet]: Endian ... |
509 |
cb->dst = dn_eth2dn(ptr); |
429eb0fae [NET] DECNET: Fix... |
510 511 512 |
if (memcmp(ptr, dn_hiord_addr, 4) != 0) goto drop_it; ptr += 6; |
1da177e4c Linux-2.6.12-rc2 |
513 |
|
429eb0fae [NET] DECNET: Fix... |
514 515 |
/* Source info */ ptr += 2; |
c4ea94ab3 [DECnet]: Endian ... |
516 |
cb->src = dn_eth2dn(ptr); |
429eb0fae [NET] DECNET: Fix... |
517 518 519 520 521 522 |
if (memcmp(ptr, dn_hiord_addr, 4) != 0) goto drop_it; ptr += 6; /* Other junk */ ptr++; cb->hops = *ptr++; /* Visit Count */ |
1da177e4c Linux-2.6.12-rc2 |
523 |
|
5d877d876 netfilter: decnet... |
524 525 |
return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING, skb, skb->dev, NULL, dn_route_rx_packet); |
1da177e4c Linux-2.6.12-rc2 |
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 |
drop_it: kfree_skb(skb); return NET_RX_DROP; } static int dn_route_rx_short(struct sk_buff *skb) { struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned char *ptr = skb->data; if (!pskb_may_pull(skb, 6)) /* 5 for short header + 1 for shortest nsp */ goto drop_it; skb_pull(skb, 5); |
badff6d01 [SK_BUFF]: Introd... |
543 |
skb_reset_transport_header(skb); |
1da177e4c Linux-2.6.12-rc2 |
544 |
|
c4ea94ab3 [DECnet]: Endian ... |
545 |
cb->dst = *(__le16 *)ptr; |
429eb0fae [NET] DECNET: Fix... |
546 547 548 549 |
ptr += 2; cb->src = *(__le16 *)ptr; ptr += 2; cb->hops = *ptr & 0x3f; |
1da177e4c Linux-2.6.12-rc2 |
550 |
|
5d877d876 netfilter: decnet... |
551 552 |
return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING, skb, skb->dev, NULL, dn_route_rx_packet); |
1da177e4c Linux-2.6.12-rc2 |
553 554 |
drop_it: |
429eb0fae [NET] DECNET: Fix... |
555 556 |
kfree_skb(skb); return NET_RX_DROP; |
1da177e4c Linux-2.6.12-rc2 |
557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 |
} static int dn_route_discard(struct sk_buff *skb) { /* * I know we drop the packet here, but thats considered success in * this case */ kfree_skb(skb); return NET_RX_SUCCESS; } static int dn_route_ptp_hello(struct sk_buff *skb) { dn_dev_hello(skb); dn_neigh_pointopoint_hello(skb); return NET_RX_SUCCESS; } |
f2ccd8fa0 [NET]: Kill skb->... |
575 |
int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4c Linux-2.6.12-rc2 |
576 577 578 |
{ struct dn_skb_cb *cb; unsigned char flags = 0; |
c4106aa88 decnet: remove pr... |
579 |
__u16 len = le16_to_cpu(*(__le16 *)skb->data); |
fc766e4c4 decnet: RCU conve... |
580 |
struct dn_dev *dn = rcu_dereference(dev->dn_ptr); |
1da177e4c Linux-2.6.12-rc2 |
581 |
unsigned char padlen = 0; |
721499e89 netns: Use net_eq... |
582 |
if (!net_eq(dev_net(dev), &init_net)) |
e730c1551 [NET]: Make packe... |
583 |
goto dump_it; |
1da177e4c Linux-2.6.12-rc2 |
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 |
if (dn == NULL) goto dump_it; if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) goto out; if (!pskb_may_pull(skb, 3)) goto dump_it; skb_pull(skb, 2); if (len > skb->len) goto dump_it; skb_trim(skb, len); flags = *skb->data; cb = DN_SKB_CB(skb); cb->stamp = jiffies; cb->iif = dev->ifindex; /* * If we have padding, remove it. */ if (flags & DN_RT_F_PF) { padlen = flags & ~DN_RT_F_PF; if (!pskb_may_pull(skb, padlen + 1)) goto dump_it; skb_pull(skb, padlen); flags = *skb->data; } |
c1d2bbe1c [SK_BUFF]: Introd... |
616 |
skb_reset_network_header(skb); |
1da177e4c Linux-2.6.12-rc2 |
617 618 619 620 621 622 623 624 625 626 |
/* * Weed out future version DECnet */ if (flags & DN_RT_F_VER) goto dump_it; cb->rt_flags = flags; if (decnet_debug_level & 1) |
429eb0fae [NET] DECNET: Fix... |
627 |
printk(KERN_DEBUG |
1da177e4c Linux-2.6.12-rc2 |
628 629 |
"dn_route_rcv: got 0x%02x from %s [%d %d %d] ", |
429eb0fae [NET] DECNET: Fix... |
630 |
(int)flags, (dev) ? dev->name : "???", len, skb->len, |
1da177e4c Linux-2.6.12-rc2 |
631 |
padlen); |
429eb0fae [NET] DECNET: Fix... |
632 |
if (flags & DN_RT_PKT_CNTL) { |
364c6badd [NET]: Clean up s... |
633 |
if (unlikely(skb_linearize(skb))) |
1da177e4c Linux-2.6.12-rc2 |
634 |
goto dump_it; |
06f8fe11b decnet: Reduce sw... |
635 636 637 638 639 640 641 |
switch (flags & DN_RT_CNTL_MSK) { case DN_RT_PKT_INIT: dn_dev_init_pkt(skb); break; case DN_RT_PKT_VERI: dn_dev_veri_pkt(skb); break; |
1da177e4c Linux-2.6.12-rc2 |
642 643 644 645 |
} if (dn->parms.state != DN_DEV_S_RU) goto dump_it; |
06f8fe11b decnet: Reduce sw... |
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 |
switch (flags & DN_RT_CNTL_MSK) { case DN_RT_PKT_HELO: return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, skb, skb->dev, NULL, dn_route_ptp_hello); case DN_RT_PKT_L1RT: case DN_RT_PKT_L2RT: return NF_HOOK(NFPROTO_DECNET, NF_DN_ROUTE, skb, skb->dev, NULL, dn_route_discard); case DN_RT_PKT_ERTH: return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, skb, skb->dev, NULL, dn_neigh_router_hello); case DN_RT_PKT_EEDH: return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO, skb, skb->dev, NULL, dn_neigh_endnode_hello); |
429eb0fae [NET] DECNET: Fix... |
666 667 |
} } else { |
1da177e4c Linux-2.6.12-rc2 |
668 669 670 671 |
if (dn->parms.state != DN_DEV_S_RU) goto dump_it; skb_pull(skb, 1); /* Pull flags */ |
06f8fe11b decnet: Reduce sw... |
672 673 674 675 676 |
switch (flags & DN_RT_PKT_MSK) { case DN_RT_PKT_LONG: return dn_route_rx_long(skb); case DN_RT_PKT_SHORT: return dn_route_rx_short(skb); |
1da177e4c Linux-2.6.12-rc2 |
677 |
} |
429eb0fae [NET] DECNET: Fix... |
678 |
} |
1da177e4c Linux-2.6.12-rc2 |
679 680 681 682 683 684 |
dump_it: kfree_skb(skb); out: return NET_RX_DROP; } |
8f40b161d neigh: Pass neigh... |
685 686 687 |
static int dn_to_neigh_output(struct sk_buff *skb) { struct dst_entry *dst = skb_dst(skb); |
272174550 net: Rename dst_g... |
688 |
struct neighbour *n = dst_get_neighbour_noref(dst); |
8f40b161d neigh: Pass neigh... |
689 690 691 |
return n->output(n, skb); } |
1da177e4c Linux-2.6.12-rc2 |
692 693 |
static int dn_output(struct sk_buff *skb) { |
adf30907d net: skb->dst acc... |
694 |
struct dst_entry *dst = skb_dst(skb); |
1da177e4c Linux-2.6.12-rc2 |
695 696 697 698 699 700 |
struct dn_route *rt = (struct dn_route *)dst; struct net_device *dev = dst->dev; struct dn_skb_cb *cb = DN_SKB_CB(skb); struct neighbour *neigh; int err = -EINVAL; |
272174550 net: Rename dst_g... |
701 |
if ((neigh = dst_get_neighbour_noref(dst)) == NULL) |
1da177e4c Linux-2.6.12-rc2 |
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 |
goto error; skb->dev = dev; cb->src = rt->rt_saddr; cb->dst = rt->rt_daddr; /* * Always set the Intra-Ethernet bit on all outgoing packets * originated on this node. Only valid flag from upper layers * is return-to-sender-requested. Set hop count to 0 too. */ cb->rt_flags &= ~DN_RT_F_RQR; cb->rt_flags |= DN_RT_F_IE; cb->hops = 0; |
5d877d876 netfilter: decnet... |
717 |
return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_OUT, skb, NULL, dev, |
8f40b161d neigh: Pass neigh... |
718 |
dn_to_neigh_output); |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 723 724 725 726 727 728 729 730 731 732 |
error: if (net_ratelimit()) printk(KERN_DEBUG "dn_output: This should not happen "); kfree_skb(skb); return err; } static int dn_forward(struct sk_buff *skb) { struct dn_skb_cb *cb = DN_SKB_CB(skb); |
adf30907d net: skb->dst acc... |
733 |
struct dst_entry *dst = skb_dst(skb); |
fc766e4c4 decnet: RCU conve... |
734 |
struct dn_dev *dn_db = rcu_dereference(dst->dev->dn_ptr); |
1da177e4c Linux-2.6.12-rc2 |
735 |
struct dn_route *rt; |
1da177e4c Linux-2.6.12-rc2 |
736 737 738 739 740 741 742 743 744 |
int header_len; #ifdef CONFIG_NETFILTER struct net_device *dev = skb->dev; #endif if (skb->pkt_type != PACKET_HOST) goto drop; /* Ensure that we have enough space for headers */ |
adf30907d net: skb->dst acc... |
745 |
rt = (struct dn_route *)skb_dst(skb); |
1da177e4c Linux-2.6.12-rc2 |
746 |
header_len = dn_db->use_long ? 21 : 6; |
d8d1f30b9 net-next: remove ... |
747 |
if (skb_cow(skb, LL_RESERVED_SPACE(rt->dst.dev)+header_len)) |
1da177e4c Linux-2.6.12-rc2 |
748 749 750 751 752 753 754 |
goto drop; /* * Hop count exceeded. */ if (++cb->hops > 30) goto drop; |
d8d1f30b9 net-next: remove ... |
755 |
skb->dev = rt->dst.dev; |
1da177e4c Linux-2.6.12-rc2 |
756 757 758 759 760 761 762 763 764 |
/* * If packet goes out same interface it came in on, then set * the Intra-Ethernet bit. This has no effect for short * packets, so we don't need to test for them here. */ cb->rt_flags &= ~DN_RT_F_IE; if (rt->rt_flags & RTCF_DOREDIRECT) cb->rt_flags |= DN_RT_F_IE; |
5d877d876 netfilter: decnet... |
765 |
return NF_HOOK(NFPROTO_DECNET, NF_DN_FORWARD, skb, dev, skb->dev, |
8f40b161d neigh: Pass neigh... |
766 |
dn_to_neigh_output); |
1da177e4c Linux-2.6.12-rc2 |
767 768 769 770 771 772 773 |
drop: kfree_skb(skb); return NET_RX_DROP; } /* |
1da177e4c Linux-2.6.12-rc2 |
774 775 776 777 778 779 780 781 782 783 |
* Used to catch bugs. This should never normally get * called. */ static int dn_rt_bug(struct sk_buff *skb) { if (net_ratelimit()) { struct dn_skb_cb *cb = DN_SKB_CB(skb); printk(KERN_DEBUG "dn_rt_bug: skb from:%04x to:%04x ", |
c4106aa88 decnet: remove pr... |
784 |
le16_to_cpu(cb->src), le16_to_cpu(cb->dst)); |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 |
} kfree_skb(skb); |
0e8635a8e net: remove NET_R... |
788 |
return NET_RX_DROP; |
1da177e4c Linux-2.6.12-rc2 |
789 |
} |
0dbaee3b3 net: Abstract def... |
790 791 792 793 |
static unsigned int dn_dst_default_advmss(const struct dst_entry *dst) { return dn_mss_from_pmtu(dst->dev, dst_mtu(dst)); } |
ebb762f27 net: Rename the d... |
794 |
static unsigned int dn_dst_mtu(const struct dst_entry *dst) |
d33e45533 net: Abstract def... |
795 |
{ |
618f9bc74 net: Move mtu han... |
796 797 798 |
unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); return mtu ? : dst->dev->mtu; |
d33e45533 net: Abstract def... |
799 |
} |
d3aaeb38c net: Add ->neigh_... |
800 801 802 803 |
static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, const void *daddr) { return __neigh_lookup_errno(&dn_neigh_table, daddr, dst->dev); } |
1da177e4c Linux-2.6.12-rc2 |
804 805 806 |
static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res) { struct dn_fib_info *fi = res->fi; |
d8d1f30b9 net-next: remove ... |
807 |
struct net_device *dev = rt->dst.dev; |
62fa8a846 net: Implement re... |
808 |
unsigned int mss_metric; |
1da177e4c Linux-2.6.12-rc2 |
809 |
struct neighbour *n; |
1da177e4c Linux-2.6.12-rc2 |
810 811 812 813 814 |
if (fi) { if (DN_FIB_RES_GW(*res) && DN_FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) rt->rt_gateway = DN_FIB_RES_GW(*res); |
62fa8a846 net: Implement re... |
815 |
dst_init_metrics(&rt->dst, fi->fib_metrics, true); |
1da177e4c Linux-2.6.12-rc2 |
816 817 |
} rt->rt_type = res->type; |
272174550 net: Rename dst_g... |
818 |
if (dev != NULL && dst_get_neighbour_noref(&rt->dst) == NULL) { |
1da177e4c Linux-2.6.12-rc2 |
819 820 821 |
n = __neigh_lookup_errno(&dn_neigh_table, &rt->rt_gateway, dev); if (IS_ERR(n)) return PTR_ERR(n); |
69cce1d14 net: Abstract dst... |
822 |
dst_set_neighbour(&rt->dst, n); |
1da177e4c Linux-2.6.12-rc2 |
823 |
} |
d33e45533 net: Abstract def... |
824 |
if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu) |
defb3519a net: Abstract awa... |
825 |
dst_metric_set(&rt->dst, RTAX_MTU, rt->dst.dev->mtu); |
62fa8a846 net: Implement re... |
826 827 |
mss_metric = dst_metric_raw(&rt->dst, RTAX_ADVMSS); if (mss_metric) { |
0dbaee3b3 net: Abstract def... |
828 |
unsigned int mss = dn_mss_from_pmtu(dev, dst_mtu(&rt->dst)); |
62fa8a846 net: Implement re... |
829 |
if (mss_metric > mss) |
0dbaee3b3 net: Abstract def... |
830 831 |
dst_metric_set(&rt->dst, RTAX_ADVMSS, mss); } |
1da177e4c Linux-2.6.12-rc2 |
832 833 |
return 0; } |
c4ea94ab3 [DECnet]: Endian ... |
834 |
static inline int dn_match_addr(__le16 addr1, __le16 addr2) |
1da177e4c Linux-2.6.12-rc2 |
835 |
{ |
c4106aa88 decnet: remove pr... |
836 |
__u16 tmp = le16_to_cpu(addr1) ^ le16_to_cpu(addr2); |
1da177e4c Linux-2.6.12-rc2 |
837 838 839 840 841 842 843 |
int match = 16; while(tmp) { tmp >>= 1; match--; } return match; } |
c4ea94ab3 [DECnet]: Endian ... |
844 |
static __le16 dnet_select_source(const struct net_device *dev, __le16 daddr, int scope) |
1da177e4c Linux-2.6.12-rc2 |
845 |
{ |
c4ea94ab3 [DECnet]: Endian ... |
846 |
__le16 saddr = 0; |
fc766e4c4 decnet: RCU conve... |
847 |
struct dn_dev *dn_db; |
1da177e4c Linux-2.6.12-rc2 |
848 849 850 |
struct dn_ifaddr *ifa; int best_match = 0; int ret; |
fc766e4c4 decnet: RCU conve... |
851 852 853 854 855 |
rcu_read_lock(); dn_db = rcu_dereference(dev->dn_ptr); for (ifa = rcu_dereference(dn_db->ifa_list); ifa != NULL; ifa = rcu_dereference(ifa->ifa_next)) { |
1da177e4c Linux-2.6.12-rc2 |
856 857 858 859 860 861 862 863 864 865 866 867 |
if (ifa->ifa_scope > scope) continue; if (!daddr) { saddr = ifa->ifa_local; break; } ret = dn_match_addr(daddr, ifa->ifa_local); if (ret > best_match) saddr = ifa->ifa_local; if (best_match == 0) saddr = ifa->ifa_local; } |
fc766e4c4 decnet: RCU conve... |
868 |
rcu_read_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
869 870 871 |
return saddr; } |
c4ea94ab3 [DECnet]: Endian ... |
872 |
static inline __le16 __dn_fib_res_prefsrc(struct dn_fib_res *res) |
1da177e4c Linux-2.6.12-rc2 |
873 874 875 |
{ return dnet_select_source(DN_FIB_RES_DEV(*res), DN_FIB_RES_GW(*res), res->scope); } |
c4ea94ab3 [DECnet]: Endian ... |
876 |
static inline __le16 dn_fib_rules_map_destination(__le16 daddr, struct dn_fib_res *res) |
1da177e4c Linux-2.6.12-rc2 |
877 |
{ |
c4ea94ab3 [DECnet]: Endian ... |
878 |
__le16 mask = dnet_make_mask(res->prefixlen); |
1da177e4c Linux-2.6.12-rc2 |
879 880 |
return (daddr&~mask)|res->fi->fib_nh->nh_gw; } |
bef55aebd decnet: Convert t... |
881 |
static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *oldflp, int try_hard) |
1da177e4c Linux-2.6.12-rc2 |
882 |
{ |
bef55aebd decnet: Convert t... |
883 884 885 886 887 888 889 |
struct flowidn fld = { .daddr = oldflp->daddr, .saddr = oldflp->saddr, .flowidn_scope = RT_SCOPE_UNIVERSE, .flowidn_mark = oldflp->flowidn_mark, .flowidn_iif = init_net.loopback_dev->ifindex, .flowidn_oif = oldflp->flowidn_oif, |
1d28f42c1 net: Put flowi_* ... |
890 |
}; |
1da177e4c Linux-2.6.12-rc2 |
891 |
struct dn_route *rt = NULL; |
7562f876c [NET]: Rework dev... |
892 |
struct net_device *dev_out = NULL, *dev; |
1da177e4c Linux-2.6.12-rc2 |
893 894 895 896 897 898 |
struct neighbour *neigh = NULL; unsigned hash; unsigned flags = 0; struct dn_fib_res res = { .fi = NULL, .type = RTN_UNICAST }; int err; int free_res = 0; |
c4ea94ab3 [DECnet]: Endian ... |
899 |
__le16 gateway = 0; |
1da177e4c Linux-2.6.12-rc2 |
900 901 902 903 |
if (decnet_debug_level & 16) printk(KERN_DEBUG "dn_route_output_slow: dst=%04x src=%04x mark=%d" |
bef55aebd decnet: Convert t... |
904 905 906 907 908 |
" iif=%d oif=%d ", le16_to_cpu(oldflp->daddr), le16_to_cpu(oldflp->saddr), oldflp->flowidn_mark, init_net.loopback_dev->ifindex, oldflp->flowidn_oif); |
1da177e4c Linux-2.6.12-rc2 |
909 910 |
/* If we have an output interface, verify its a DECnet device */ |
bef55aebd decnet: Convert t... |
911 912 |
if (oldflp->flowidn_oif) { dev_out = dev_get_by_index(&init_net, oldflp->flowidn_oif); |
1da177e4c Linux-2.6.12-rc2 |
913 914 915 916 917 918 919 920 921 922 |
err = -ENODEV; if (dev_out && dev_out->dn_ptr == NULL) { dev_put(dev_out); dev_out = NULL; } if (dev_out == NULL) goto out; } /* If we have a source address, verify that its a local address */ |
bef55aebd decnet: Convert t... |
923 |
if (oldflp->saddr) { |
1da177e4c Linux-2.6.12-rc2 |
924 925 926 |
err = -EADDRNOTAVAIL; if (dev_out) { |
bef55aebd decnet: Convert t... |
927 |
if (dn_dev_islocal(dev_out, oldflp->saddr)) |
1da177e4c Linux-2.6.12-rc2 |
928 929 930 931 |
goto source_ok; dev_put(dev_out); goto out; } |
c6d14c845 net: Introduce fo... |
932 933 |
rcu_read_lock(); for_each_netdev_rcu(&init_net, dev) { |
7562f876c [NET]: Rework dev... |
934 |
if (!dev->dn_ptr) |
1da177e4c Linux-2.6.12-rc2 |
935 |
continue; |
bef55aebd decnet: Convert t... |
936 |
if (!dn_dev_islocal(dev, oldflp->saddr)) |
9bbf28a1f [DECNET]: Fix for... |
937 |
continue; |
7562f876c [NET]: Rework dev... |
938 |
if ((dev->flags & IFF_LOOPBACK) && |
bef55aebd decnet: Convert t... |
939 940 |
oldflp->daddr && !dn_dev_islocal(dev, oldflp->daddr)) |
9bbf28a1f [DECNET]: Fix for... |
941 |
continue; |
7562f876c [NET]: Rework dev... |
942 943 |
dev_out = dev; |
9bbf28a1f [DECNET]: Fix for... |
944 |
break; |
1da177e4c Linux-2.6.12-rc2 |
945 |
} |
c6d14c845 net: Introduce fo... |
946 |
rcu_read_unlock(); |
1da177e4c Linux-2.6.12-rc2 |
947 948 949 950 951 952 953 954 |
if (dev_out == NULL) goto out; dev_hold(dev_out); source_ok: ; } /* No destination? Assume its local */ |
bef55aebd decnet: Convert t... |
955 956 |
if (!fld.daddr) { fld.daddr = fld.saddr; |
1da177e4c Linux-2.6.12-rc2 |
957 958 959 960 |
err = -EADDRNOTAVAIL; if (dev_out) dev_put(dev_out); |
2774c7aba [NET]: Make the l... |
961 |
dev_out = init_net.loopback_dev; |
1da177e4c Linux-2.6.12-rc2 |
962 |
dev_hold(dev_out); |
bef55aebd decnet: Convert t... |
963 964 965 |
if (!fld.daddr) { fld.daddr = fld.saddr = dnet_select_source(dev_out, 0, |
1da177e4c Linux-2.6.12-rc2 |
966 |
RT_SCOPE_HOST); |
bef55aebd decnet: Convert t... |
967 |
if (!fld.daddr) |
1da177e4c Linux-2.6.12-rc2 |
968 969 |
goto out; } |
bef55aebd decnet: Convert t... |
970 |
fld.flowidn_oif = init_net.loopback_dev->ifindex; |
1da177e4c Linux-2.6.12-rc2 |
971 972 973 974 975 976 977 |
res.type = RTN_LOCAL; goto make_route; } if (decnet_debug_level & 16) printk(KERN_DEBUG "dn_route_output_slow: initial checks complete." |
c4ea94ab3 [DECnet]: Endian ... |
978 979 |
" dst=%o4x src=%04x oif=%d try_hard=%d ", |
bef55aebd decnet: Convert t... |
980 981 |
le16_to_cpu(fld.daddr), le16_to_cpu(fld.saddr), fld.flowidn_oif, try_hard); |
1da177e4c Linux-2.6.12-rc2 |
982 983 984 985 986 987 988 |
/* * N.B. If the kernel is compiled without router support then * dn_fib_lookup() will evaluate to non-zero so this if () block * will always be executed. */ err = -ESRCH; |
bef55aebd decnet: Convert t... |
989 |
if (try_hard || (err = dn_fib_lookup(&fld, &res)) != 0) { |
1da177e4c Linux-2.6.12-rc2 |
990 991 992 993 |
struct dn_dev *dn_db; if (err != -ESRCH) goto out; /* |
429eb0fae [NET] DECNET: Fix... |
994 |
* Here the fallback is basically the standard algorithm for |
1da177e4c Linux-2.6.12-rc2 |
995 996 997 998 999 |
* routing in endnodes which is described in the DECnet routing * docs * * If we are not trying hard, look in neighbour cache. * The result is tested to ensure that if a specific output |
429eb0fae [NET] DECNET: Fix... |
1000 |
* device/source address was requested, then we honour that |
1da177e4c Linux-2.6.12-rc2 |
1001 1002 1003 |
* here */ if (!try_hard) { |
bef55aebd decnet: Convert t... |
1004 |
neigh = neigh_lookup_nodev(&dn_neigh_table, &init_net, &fld.daddr); |
1da177e4c Linux-2.6.12-rc2 |
1005 |
if (neigh) { |
bef55aebd decnet: Convert t... |
1006 1007 1008 |
if ((oldflp->flowidn_oif && (neigh->dev->ifindex != oldflp->flowidn_oif)) || (oldflp->saddr && |
1da177e4c Linux-2.6.12-rc2 |
1009 |
(!dn_dev_islocal(neigh->dev, |
bef55aebd decnet: Convert t... |
1010 |
oldflp->saddr)))) { |
1da177e4c Linux-2.6.12-rc2 |
1011 1012 1013 1014 1015 |
neigh_release(neigh); neigh = NULL; } else { if (dev_out) dev_put(dev_out); |
bef55aebd decnet: Convert t... |
1016 |
if (dn_dev_islocal(neigh->dev, fld.daddr)) { |
2774c7aba [NET]: Make the l... |
1017 |
dev_out = init_net.loopback_dev; |
1da177e4c Linux-2.6.12-rc2 |
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 |
res.type = RTN_LOCAL; } else { dev_out = neigh->dev; } dev_hold(dev_out); goto select_source; } } } /* Not there? Perhaps its a local address */ if (dev_out == NULL) dev_out = dn_dev_get_default(); err = -ENODEV; if (dev_out == NULL) goto out; |
fc766e4c4 decnet: RCU conve... |
1034 |
dn_db = rcu_dereference_raw(dev_out->dn_ptr); |
1da177e4c Linux-2.6.12-rc2 |
1035 |
/* Possible improvement - check all devices for local addr */ |
bef55aebd decnet: Convert t... |
1036 |
if (dn_dev_islocal(dev_out, fld.daddr)) { |
1da177e4c Linux-2.6.12-rc2 |
1037 |
dev_put(dev_out); |
2774c7aba [NET]: Make the l... |
1038 |
dev_out = init_net.loopback_dev; |
1da177e4c Linux-2.6.12-rc2 |
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 |
dev_hold(dev_out); res.type = RTN_LOCAL; goto select_source; } /* Not local either.... try sending it to the default router */ neigh = neigh_clone(dn_db->router); BUG_ON(neigh && neigh->dev != dev_out); /* Ok then, we assume its directly connected and move on */ select_source: if (neigh) gateway = ((struct dn_neigh *)neigh)->addr; if (gateway == 0) |
bef55aebd decnet: Convert t... |
1052 1053 1054 1055 1056 1057 1058 |
gateway = fld.daddr; if (fld.saddr == 0) { fld.saddr = dnet_select_source(dev_out, gateway, res.type == RTN_LOCAL ? RT_SCOPE_HOST : RT_SCOPE_LINK); if (fld.saddr == 0 && res.type != RTN_LOCAL) |
1da177e4c Linux-2.6.12-rc2 |
1059 1060 |
goto e_addr; } |
bef55aebd decnet: Convert t... |
1061 |
fld.flowidn_oif = dev_out->ifindex; |
1da177e4c Linux-2.6.12-rc2 |
1062 1063 1064 1065 1066 1067 1068 1069 |
goto make_route; } free_res = 1; if (res.type == RTN_NAT) goto e_inval; if (res.type == RTN_LOCAL) { |
bef55aebd decnet: Convert t... |
1070 1071 |
if (!fld.saddr) fld.saddr = fld.daddr; |
1da177e4c Linux-2.6.12-rc2 |
1072 1073 |
if (dev_out) dev_put(dev_out); |
2774c7aba [NET]: Make the l... |
1074 |
dev_out = init_net.loopback_dev; |
1da177e4c Linux-2.6.12-rc2 |
1075 |
dev_hold(dev_out); |
bef55aebd decnet: Convert t... |
1076 |
fld.flowidn_oif = dev_out->ifindex; |
1da177e4c Linux-2.6.12-rc2 |
1077 1078 1079 1080 1081 |
if (res.fi) dn_fib_info_put(res.fi); res.fi = NULL; goto make_route; } |
bef55aebd decnet: Convert t... |
1082 1083 |
if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0) dn_fib_select_multipath(&fld, &res); |
1da177e4c Linux-2.6.12-rc2 |
1084 |
|
429eb0fae [NET] DECNET: Fix... |
1085 |
/* |
1da177e4c Linux-2.6.12-rc2 |
1086 1087 1088 |
* We could add some logic to deal with default routes here and * get rid of some of the special casing above. */ |
bef55aebd decnet: Convert t... |
1089 1090 |
if (!fld.saddr) fld.saddr = DN_FIB_RES_PREFSRC(res); |
429eb0fae [NET] DECNET: Fix... |
1091 |
|
1da177e4c Linux-2.6.12-rc2 |
1092 1093 1094 1095 |
if (dev_out) dev_put(dev_out); dev_out = DN_FIB_RES_DEV(res); dev_hold(dev_out); |
bef55aebd decnet: Convert t... |
1096 |
fld.flowidn_oif = dev_out->ifindex; |
1da177e4c Linux-2.6.12-rc2 |
1097 1098 1099 1100 1101 |
gateway = DN_FIB_RES_GW(res); make_route: if (dev_out->flags & IFF_LOOPBACK) flags |= RTCF_LOCAL; |
5c1e6aa30 net: Make dst_all... |
1102 |
rt = dst_alloc(&dn_dst_ops, dev_out, 1, 0, DST_HOST); |
1da177e4c Linux-2.6.12-rc2 |
1103 1104 |
if (rt == NULL) goto e_nobufs; |
cf9116622 net: Use non-zero... |
1105 |
memset(&rt->fld, 0, sizeof(rt->fld)); |
bef55aebd decnet: Convert t... |
1106 1107 1108 1109 1110 |
rt->fld.saddr = oldflp->saddr; rt->fld.daddr = oldflp->daddr; rt->fld.flowidn_oif = oldflp->flowidn_oif; rt->fld.flowidn_iif = 0; rt->fld.flowidn_mark = oldflp->flowidn_mark; |
1da177e4c Linux-2.6.12-rc2 |
1111 |
|
bef55aebd decnet: Convert t... |
1112 1113 1114 1115 |
rt->rt_saddr = fld.saddr; rt->rt_daddr = fld.daddr; rt->rt_gateway = gateway ? gateway : fld.daddr; rt->rt_local_src = fld.saddr; |
1da177e4c Linux-2.6.12-rc2 |
1116 |
|
bef55aebd decnet: Convert t... |
1117 1118 |
rt->rt_dst_map = fld.daddr; rt->rt_src_map = fld.saddr; |
1da177e4c Linux-2.6.12-rc2 |
1119 |
|
69cce1d14 net: Abstract dst... |
1120 |
dst_set_neighbour(&rt->dst, neigh); |
1da177e4c Linux-2.6.12-rc2 |
1121 |
neigh = NULL; |
d8d1f30b9 net-next: remove ... |
1122 1123 1124 |
rt->dst.lastuse = jiffies; rt->dst.output = dn_output; rt->dst.input = dn_rt_bug; |
1da177e4c Linux-2.6.12-rc2 |
1125 1126 |
rt->rt_flags = flags; if (flags & RTCF_LOCAL) |
d8d1f30b9 net-next: remove ... |
1127 |
rt->dst.input = dn_nsp_rx; |
1da177e4c Linux-2.6.12-rc2 |
1128 1129 1130 1131 |
err = dn_rt_set_next_hop(rt, &res); if (err) goto e_neighbour; |
bef55aebd decnet: Convert t... |
1132 |
hash = dn_hash(rt->fld.saddr, rt->fld.daddr); |
1da177e4c Linux-2.6.12-rc2 |
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 |
dn_insert_route(rt, hash, (struct dn_route **)pprt); done: if (neigh) neigh_release(neigh); if (free_res) dn_fib_res_put(&res); if (dev_out) dev_put(dev_out); out: return err; e_addr: |
429eb0fae [NET] DECNET: Fix... |
1146 1147 |
err = -EADDRNOTAVAIL; goto done; |
1da177e4c Linux-2.6.12-rc2 |
1148 1149 1150 1151 1152 1153 1154 |
e_inval: err = -EINVAL; goto done; e_nobufs: err = -ENOBUFS; goto done; e_neighbour: |
d8d1f30b9 net-next: remove ... |
1155 |
dst_free(&rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
1156 1157 1158 1159 1160 1161 1162 |
goto e_nobufs; } /* * N.B. The flags may be moved into the flowi at some future stage. */ |
bef55aebd decnet: Convert t... |
1163 |
static int __dn_route_output_key(struct dst_entry **pprt, const struct flowidn *flp, int flags) |
1da177e4c Linux-2.6.12-rc2 |
1164 |
{ |
bef55aebd decnet: Convert t... |
1165 |
unsigned hash = dn_hash(flp->saddr, flp->daddr); |
1da177e4c Linux-2.6.12-rc2 |
1166 1167 1168 1169 |
struct dn_route *rt = NULL; if (!(flags & MSG_TRYHARD)) { rcu_read_lock_bh(); |
a898def29 net: Add checking... |
1170 |
for (rt = rcu_dereference_bh(dn_rt_hash_table[hash].chain); rt; |
d8d1f30b9 net-next: remove ... |
1171 |
rt = rcu_dereference_bh(rt->dst.dn_next)) { |
bef55aebd decnet: Convert t... |
1172 1173 1174 |
if ((flp->daddr == rt->fld.daddr) && (flp->saddr == rt->fld.saddr) && (flp->flowidn_mark == rt->fld.flowidn_mark) && |
c75379676 ipv4: Make rt->fl... |
1175 |
dn_is_output_route(rt) && |
bef55aebd decnet: Convert t... |
1176 |
(rt->fld.flowidn_oif == flp->flowidn_oif)) { |
d8d1f30b9 net-next: remove ... |
1177 |
dst_use(&rt->dst, jiffies); |
1da177e4c Linux-2.6.12-rc2 |
1178 |
rcu_read_unlock_bh(); |
d8d1f30b9 net-next: remove ... |
1179 |
*pprt = &rt->dst; |
1da177e4c Linux-2.6.12-rc2 |
1180 1181 1182 1183 1184 1185 1186 1187 |
return 0; } } rcu_read_unlock_bh(); } return dn_route_output_slow(pprt, flp, flags); } |
bef55aebd decnet: Convert t... |
1188 |
static int dn_route_output_key(struct dst_entry **pprt, struct flowidn *flp, int flags) |
1da177e4c Linux-2.6.12-rc2 |
1189 1190 1191 1192 |
{ int err; err = __dn_route_output_key(pprt, flp, flags); |
bef55aebd decnet: Convert t... |
1193 1194 1195 |
if (err == 0 && flp->flowidn_proto) { *pprt = xfrm_lookup(&init_net, *pprt, flowidn_to_flowi(flp), NULL, 0); |
452edd598 xfrm: Return dst ... |
1196 1197 1198 1199 |
if (IS_ERR(*pprt)) { err = PTR_ERR(*pprt); *pprt = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
1200 1201 1202 |
} return err; } |
bef55aebd decnet: Convert t... |
1203 |
int dn_route_output_sock(struct dst_entry **pprt, struct flowidn *fl, struct sock *sk, int flags) |
1da177e4c Linux-2.6.12-rc2 |
1204 1205 1206 1207 |
{ int err; err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD); |
bef55aebd decnet: Convert t... |
1208 |
if (err == 0 && fl->flowidn_proto) { |
80c0bc9e3 xfrm: Kill XFRM_L... |
1209 |
if (!(flags & MSG_DONTWAIT)) |
bef55aebd decnet: Convert t... |
1210 1211 1212 |
fl->flowidn_flags |= FLOWI_FLAG_CAN_SLEEP; *pprt = xfrm_lookup(&init_net, *pprt, flowidn_to_flowi(fl), sk, 0); |
452edd598 xfrm: Return dst ... |
1213 1214 1215 1216 |
if (IS_ERR(*pprt)) { err = PTR_ERR(*pprt); *pprt = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 |
} return err; } static int dn_route_input_slow(struct sk_buff *skb) { struct dn_route *rt = NULL; struct dn_skb_cb *cb = DN_SKB_CB(skb); struct net_device *in_dev = skb->dev; struct net_device *out_dev = NULL; struct dn_dev *dn_db; struct neighbour *neigh = NULL; unsigned hash; int flags = 0; |
c4ea94ab3 [DECnet]: Endian ... |
1231 1232 |
__le16 gateway = 0; __le16 local_src = 0; |
bef55aebd decnet: Convert t... |
1233 1234 1235 1236 1237 1238 |
struct flowidn fld = { .daddr = cb->dst, .saddr = cb->src, .flowidn_scope = RT_SCOPE_UNIVERSE, .flowidn_mark = skb->mark, .flowidn_iif = skb->dev->ifindex, |
1d28f42c1 net: Put flowi_* ... |
1239 |
}; |
1da177e4c Linux-2.6.12-rc2 |
1240 1241 1242 1243 1244 |
struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE }; int err = -EINVAL; int free_res = 0; dev_hold(in_dev); |
fc766e4c4 decnet: RCU conve... |
1245 |
if ((dn_db = rcu_dereference(in_dev->dn_ptr)) == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1246 1247 1248 |
goto out; /* Zero source addresses are not allowed */ |
bef55aebd decnet: Convert t... |
1249 |
if (fld.saddr == 0) |
1da177e4c Linux-2.6.12-rc2 |
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 |
goto out; /* * In this case we've just received a packet from a source * outside ourselves pretending to come from us. We don't * allow it any further to prevent routing loops, spoofing and * other nasties. Loopback packets already have the dst attached * so this only affects packets which have originated elsewhere. */ err = -ENOTUNIQ; if (dn_dev_islocal(in_dev, cb->src)) goto out; |
bef55aebd decnet: Convert t... |
1262 |
err = dn_fib_lookup(&fld, &res); |
1da177e4c Linux-2.6.12-rc2 |
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 |
if (err) { if (err != -ESRCH) goto out; /* * Is the destination us ? */ if (!dn_dev_islocal(in_dev, cb->dst)) goto e_inval; res.type = RTN_LOCAL; |
1da177e4c Linux-2.6.12-rc2 |
1273 |
} else { |
bef55aebd decnet: Convert t... |
1274 |
__le16 src_map = fld.saddr; |
1da177e4c Linux-2.6.12-rc2 |
1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 |
free_res = 1; out_dev = DN_FIB_RES_DEV(res); if (out_dev == NULL) { if (net_ratelimit()) printk(KERN_CRIT "Bug in dn_route_input_slow() " "No output device "); goto e_inval; } dev_hold(out_dev); if (res.r) |
bef55aebd decnet: Convert t... |
1288 |
src_map = fld.saddr; /* no NAT support for now */ |
1da177e4c Linux-2.6.12-rc2 |
1289 1290 1291 |
gateway = DN_FIB_RES_GW(res); if (res.type == RTN_NAT) { |
bef55aebd decnet: Convert t... |
1292 |
fld.daddr = dn_fib_rules_map_destination(fld.daddr, &res); |
1da177e4c Linux-2.6.12-rc2 |
1293 1294 |
dn_fib_res_put(&res); free_res = 0; |
bef55aebd decnet: Convert t... |
1295 |
if (dn_fib_lookup(&fld, &res)) |
1da177e4c Linux-2.6.12-rc2 |
1296 1297 1298 1299 1300 |
goto e_inval; free_res = 1; if (res.type != RTN_UNICAST) goto e_inval; flags |= RTCF_DNAT; |
bef55aebd decnet: Convert t... |
1301 |
gateway = fld.daddr; |
1da177e4c Linux-2.6.12-rc2 |
1302 |
} |
bef55aebd decnet: Convert t... |
1303 |
fld.saddr = src_map; |
1da177e4c Linux-2.6.12-rc2 |
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 |
} switch(res.type) { case RTN_UNICAST: /* * Forwarding check here, we only check for forwarding * being turned off, if you want to only forward intra * area, its up to you to set the routing tables up * correctly. */ if (dn_db->parms.forwarding == 0) goto e_inval; |
bef55aebd decnet: Convert t... |
1316 1317 |
if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0) dn_fib_select_multipath(&fld, &res); |
1da177e4c Linux-2.6.12-rc2 |
1318 |
|
429eb0fae [NET] DECNET: Fix... |
1319 |
/* |
1da177e4c Linux-2.6.12-rc2 |
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 |
* Check for out_dev == in_dev. We use the RTCF_DOREDIRECT * flag as a hint to set the intra-ethernet bit when * forwarding. If we've got NAT in operation, we don't do * this optimisation. */ if (out_dev == in_dev && !(flags & RTCF_NAT)) flags |= RTCF_DOREDIRECT; local_src = DN_FIB_RES_PREFSRC(res); case RTN_BLACKHOLE: case RTN_UNREACHABLE: break; case RTN_LOCAL: flags |= RTCF_LOCAL; |
bef55aebd decnet: Convert t... |
1335 1336 |
fld.saddr = cb->dst; fld.daddr = cb->src; |
1da177e4c Linux-2.6.12-rc2 |
1337 1338 1339 1340 1341 1342 |
/* Routing tables gave us a gateway */ if (gateway) goto make_route; /* Packet was intra-ethernet, so we know its on-link */ |
3a31b9d2f [DECNET]: Fix inp... |
1343 |
if (cb->rt_flags & DN_RT_F_IE) { |
1da177e4c Linux-2.6.12-rc2 |
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 |
gateway = cb->src; flags |= RTCF_DIRECTSRC; goto make_route; } /* Use the default router if there is one */ neigh = neigh_clone(dn_db->router); if (neigh) { gateway = ((struct dn_neigh *)neigh)->addr; goto make_route; } /* Close eyes and pray */ gateway = cb->src; flags |= RTCF_DIRECTSRC; goto make_route; default: goto e_inval; } make_route: |
5c1e6aa30 net: Make dst_all... |
1365 |
rt = dst_alloc(&dn_dst_ops, out_dev, 0, 0, DST_HOST); |
1da177e4c Linux-2.6.12-rc2 |
1366 1367 |
if (rt == NULL) goto e_nobufs; |
cf9116622 net: Use non-zero... |
1368 |
memset(&rt->fld, 0, sizeof(rt->fld)); |
bef55aebd decnet: Convert t... |
1369 1370 1371 |
rt->rt_saddr = fld.saddr; rt->rt_daddr = fld.daddr; rt->rt_gateway = fld.daddr; |
1da177e4c Linux-2.6.12-rc2 |
1372 1373 1374 |
if (gateway) rt->rt_gateway = gateway; rt->rt_local_src = local_src ? local_src : rt->rt_saddr; |
bef55aebd decnet: Convert t... |
1375 1376 |
rt->rt_dst_map = fld.daddr; rt->rt_src_map = fld.saddr; |
1da177e4c Linux-2.6.12-rc2 |
1377 |
|
bef55aebd decnet: Convert t... |
1378 1379 1380 1381 1382 |
rt->fld.saddr = cb->src; rt->fld.daddr = cb->dst; rt->fld.flowidn_oif = 0; rt->fld.flowidn_iif = in_dev->ifindex; rt->fld.flowidn_mark = fld.flowidn_mark; |
1da177e4c Linux-2.6.12-rc2 |
1383 |
|
69cce1d14 net: Abstract dst... |
1384 |
dst_set_neighbour(&rt->dst, neigh); |
d8d1f30b9 net-next: remove ... |
1385 1386 |
rt->dst.lastuse = jiffies; rt->dst.output = dn_rt_bug; |
06f8fe11b decnet: Reduce sw... |
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 |
switch (res.type) { case RTN_UNICAST: rt->dst.input = dn_forward; break; case RTN_LOCAL: rt->dst.output = dn_output; rt->dst.input = dn_nsp_rx; rt->dst.dev = in_dev; flags |= RTCF_LOCAL; break; default: case RTN_UNREACHABLE: case RTN_BLACKHOLE: rt->dst.input = dst_discard; |
1da177e4c Linux-2.6.12-rc2 |
1401 1402 |
} rt->rt_flags = flags; |
1da177e4c Linux-2.6.12-rc2 |
1403 1404 1405 1406 |
err = dn_rt_set_next_hop(rt, &res); if (err) goto e_neighbour; |
bef55aebd decnet: Convert t... |
1407 |
hash = dn_hash(rt->fld.saddr, rt->fld.daddr); |
adf30907d net: skb->dst acc... |
1408 |
dn_insert_route(rt, hash, &rt); |
d8d1f30b9 net-next: remove ... |
1409 |
skb_dst_set(skb, &rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 |
done: if (neigh) neigh_release(neigh); if (free_res) dn_fib_res_put(&res); dev_put(in_dev); if (out_dev) dev_put(out_dev); out: return err; e_inval: err = -EINVAL; goto done; e_nobufs: err = -ENOBUFS; goto done; e_neighbour: |
d8d1f30b9 net-next: remove ... |
1431 |
dst_free(&rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
1432 1433 |
goto done; } |
5eaa65b24 net: Make static |
1434 |
static int dn_route_input(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1435 1436 1437 1438 |
{ struct dn_route *rt; struct dn_skb_cb *cb = DN_SKB_CB(skb); unsigned hash = dn_hash(cb->src, cb->dst); |
adf30907d net: skb->dst acc... |
1439 |
if (skb_dst(skb)) |
1da177e4c Linux-2.6.12-rc2 |
1440 1441 1442 1443 |
return 0; rcu_read_lock(); for(rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL; |
d8d1f30b9 net-next: remove ... |
1444 |
rt = rcu_dereference(rt->dst.dn_next)) { |
bef55aebd decnet: Convert t... |
1445 1446 1447 1448 1449 |
if ((rt->fld.saddr == cb->src) && (rt->fld.daddr == cb->dst) && (rt->fld.flowidn_oif == 0) && (rt->fld.flowidn_mark == skb->mark) && (rt->fld.flowidn_iif == cb->iif)) { |
d8d1f30b9 net-next: remove ... |
1450 |
dst_use(&rt->dst, jiffies); |
1da177e4c Linux-2.6.12-rc2 |
1451 |
rcu_read_unlock(); |
adf30907d net: skb->dst acc... |
1452 |
skb_dst_set(skb, (struct dst_entry *)rt); |
1da177e4c Linux-2.6.12-rc2 |
1453 1454 1455 1456 1457 1458 1459 |
return 0; } } rcu_read_unlock(); return dn_route_input_slow(skb); } |
b6544c0b4 [NETLINK]: Correc... |
1460 1461 |
static int dn_rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event, int nowait, unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
1462 |
{ |
adf30907d net: skb->dst acc... |
1463 |
struct dn_route *rt = (struct dn_route *)skb_dst(skb); |
1da177e4c Linux-2.6.12-rc2 |
1464 1465 |
struct rtmsg *r; struct nlmsghdr *nlh; |
27a884dc3 [SK_BUFF]: Conver... |
1466 |
unsigned char *b = skb_tail_pointer(skb); |
e3703b3de [RTNETLINK]: Add ... |
1467 |
long expires; |
1da177e4c Linux-2.6.12-rc2 |
1468 |
|
b6544c0b4 [NETLINK]: Correc... |
1469 |
nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); |
1da177e4c Linux-2.6.12-rc2 |
1470 |
r = NLMSG_DATA(nlh); |
1da177e4c Linux-2.6.12-rc2 |
1471 1472 1473 1474 1475 |
r->rtm_family = AF_DECnet; r->rtm_dst_len = 16; r->rtm_src_len = 0; r->rtm_tos = 0; r->rtm_table = RT_TABLE_MAIN; |
9e762a4a8 [NET]: Introduce ... |
1476 |
RTA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN); |
1da177e4c Linux-2.6.12-rc2 |
1477 1478 1479 1480 1481 1482 1483 |
r->rtm_type = rt->rt_type; r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; r->rtm_scope = RT_SCOPE_UNIVERSE; r->rtm_protocol = RTPROT_UNSPEC; if (rt->rt_flags & RTCF_NOTIFY) r->rtm_flags |= RTM_F_NOTIFY; RTA_PUT(skb, RTA_DST, 2, &rt->rt_daddr); |
bef55aebd decnet: Convert t... |
1484 |
if (rt->fld.saddr) { |
1da177e4c Linux-2.6.12-rc2 |
1485 |
r->rtm_src_len = 16; |
bef55aebd decnet: Convert t... |
1486 |
RTA_PUT(skb, RTA_SRC, 2, &rt->fld.saddr); |
1da177e4c Linux-2.6.12-rc2 |
1487 |
} |
d8d1f30b9 net-next: remove ... |
1488 1489 |
if (rt->dst.dev) RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->dst.dev->ifindex); |
1da177e4c Linux-2.6.12-rc2 |
1490 1491 1492 1493 1494 1495 1496 1497 |
/* * Note to self - change this if input routes reverse direction when * they deal only with inputs and not with replies like they do * currently. */ RTA_PUT(skb, RTA_PREFSRC, 2, &rt->rt_local_src); if (rt->rt_daddr != rt->rt_gateway) RTA_PUT(skb, RTA_GATEWAY, 2, &rt->rt_gateway); |
defb3519a net: Abstract awa... |
1498 |
if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) |
1da177e4c Linux-2.6.12-rc2 |
1499 |
goto rtattr_failure; |
d8d1f30b9 net-next: remove ... |
1500 1501 1502 |
expires = rt->dst.expires ? rt->dst.expires - jiffies : 0; if (rtnl_put_cacheinfo(skb, &rt->dst, 0, 0, 0, expires, rt->dst.error) < 0) |
e3703b3de [RTNETLINK]: Add ... |
1503 |
goto rtattr_failure; |
c75379676 ipv4: Make rt->fl... |
1504 |
if (dn_is_input_route(rt)) |
bef55aebd decnet: Convert t... |
1505 |
RTA_PUT(skb, RTA_IIF, sizeof(int), &rt->fld.flowidn_iif); |
1da177e4c Linux-2.6.12-rc2 |
1506 |
|
27a884dc3 [SK_BUFF]: Conver... |
1507 |
nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
1da177e4c Linux-2.6.12-rc2 |
1508 1509 1510 1511 |
return skb->len; nlmsg_failure: rtattr_failure: |
dc5fc579b [NETLINK]: Use nl... |
1512 |
nlmsg_trim(skb, b); |
429eb0fae [NET] DECNET: Fix... |
1513 |
return -1; |
1da177e4c Linux-2.6.12-rc2 |
1514 1515 1516 1517 1518 |
} /* * This is called by both endnodes and routers now. */ |
fa34ddd73 [DECNet]: Use rtn... |
1519 |
static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void *arg) |
1da177e4c Linux-2.6.12-rc2 |
1520 |
{ |
3b1e0a655 [NET] NETNS: Omit... |
1521 |
struct net *net = sock_net(in_skb->sk); |
1da177e4c Linux-2.6.12-rc2 |
1522 1523 1524 1525 1526 1527 |
struct rtattr **rta = arg; struct rtmsg *rtm = NLMSG_DATA(nlh); struct dn_route *rt = NULL; struct dn_skb_cb *cb; int err; struct sk_buff *skb; |
bef55aebd decnet: Convert t... |
1528 |
struct flowidn fld; |
1da177e4c Linux-2.6.12-rc2 |
1529 |
|
09ad9bc75 net: use net_eq t... |
1530 |
if (!net_eq(net, &init_net)) |
b854272b3 [NET]: Modify all... |
1531 |
return -EINVAL; |
bef55aebd decnet: Convert t... |
1532 1533 |
memset(&fld, 0, sizeof(fld)); fld.flowidn_proto = DNPROTO_NSP; |
1da177e4c Linux-2.6.12-rc2 |
1534 1535 1536 1537 |
skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (skb == NULL) return -ENOBUFS; |
459a98ed8 [SK_BUFF]: Introd... |
1538 |
skb_reset_mac_header(skb); |
1da177e4c Linux-2.6.12-rc2 |
1539 1540 1541 |
cb = DN_SKB_CB(skb); if (rta[RTA_SRC-1]) |
bef55aebd decnet: Convert t... |
1542 |
memcpy(&fld.saddr, RTA_DATA(rta[RTA_SRC-1]), 2); |
1da177e4c Linux-2.6.12-rc2 |
1543 |
if (rta[RTA_DST-1]) |
bef55aebd decnet: Convert t... |
1544 |
memcpy(&fld.daddr, RTA_DATA(rta[RTA_DST-1]), 2); |
1da177e4c Linux-2.6.12-rc2 |
1545 |
if (rta[RTA_IIF-1]) |
bef55aebd decnet: Convert t... |
1546 |
memcpy(&fld.flowidn_iif, RTA_DATA(rta[RTA_IIF-1]), sizeof(int)); |
1da177e4c Linux-2.6.12-rc2 |
1547 |
|
bef55aebd decnet: Convert t... |
1548 |
if (fld.flowidn_iif) { |
1da177e4c Linux-2.6.12-rc2 |
1549 |
struct net_device *dev; |
bef55aebd decnet: Convert t... |
1550 |
if ((dev = dev_get_by_index(&init_net, fld.flowidn_iif)) == NULL) { |
1da177e4c Linux-2.6.12-rc2 |
1551 1552 1553 1554 1555 1556 1557 1558 |
kfree_skb(skb); return -ENODEV; } if (!dev->dn_ptr) { dev_put(dev); kfree_skb(skb); return -ENODEV; } |
b98999dc3 [DECNET]: Use hto... |
1559 |
skb->protocol = htons(ETH_P_DNA_RT); |
1da177e4c Linux-2.6.12-rc2 |
1560 |
skb->dev = dev; |
bef55aebd decnet: Convert t... |
1561 1562 |
cb->src = fld.saddr; cb->dst = fld.daddr; |
1da177e4c Linux-2.6.12-rc2 |
1563 1564 1565 1566 |
local_bh_disable(); err = dn_route_input(skb); local_bh_enable(); memset(cb, 0, sizeof(struct dn_skb_cb)); |
adf30907d net: skb->dst acc... |
1567 |
rt = (struct dn_route *)skb_dst(skb); |
d8d1f30b9 net-next: remove ... |
1568 1569 |
if (!err && -rt->dst.error) err = rt->dst.error; |
1da177e4c Linux-2.6.12-rc2 |
1570 1571 1572 1573 |
} else { int oif = 0; if (rta[RTA_OIF - 1]) memcpy(&oif, RTA_DATA(rta[RTA_OIF - 1]), sizeof(int)); |
bef55aebd decnet: Convert t... |
1574 1575 |
fld.flowidn_oif = oif; err = dn_route_output_key((struct dst_entry **)&rt, &fld, 0); |
1da177e4c Linux-2.6.12-rc2 |
1576 1577 1578 1579 1580 1581 1582 |
} if (skb->dev) dev_put(skb->dev); skb->dev = NULL; if (err) goto out_free; |
d8d1f30b9 net-next: remove ... |
1583 |
skb_dst_set(skb, &rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
1584 1585 |
if (rtm->rtm_flags & RTM_F_NOTIFY) rt->rt_flags |= RTCF_NOTIFY; |
b6544c0b4 [NETLINK]: Correc... |
1586 |
err = dn_rt_fill_info(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq, RTM_NEWROUTE, 0, 0); |
1da177e4c Linux-2.6.12-rc2 |
1587 1588 1589 1590 1591 1592 1593 |
if (err == 0) goto out_free; if (err < 0) { err = -EMSGSIZE; goto out_free; } |
97c53cacf [NET]: Make rtnet... |
1594 |
return rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid); |
1da177e4c Linux-2.6.12-rc2 |
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 |
out_free: kfree_skb(skb); return err; } /* * For routers, this is called from dn_fib_dump, but for endnodes its * called directly from the rtnetlink dispatch table. */ int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb) { |
3b1e0a655 [NET] NETNS: Omit... |
1607 |
struct net *net = sock_net(skb->sk); |
1da177e4c Linux-2.6.12-rc2 |
1608 1609 1610 |
struct dn_route *rt; int h, s_h; int idx, s_idx; |
09ad9bc75 net: use net_eq t... |
1611 |
if (!net_eq(net, &init_net)) |
b854272b3 [NET]: Modify all... |
1612 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 |
if (NLMSG_PAYLOAD(cb->nlh, 0) < sizeof(struct rtmsg)) return -EINVAL; if (!(((struct rtmsg *)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED)) return 0; s_h = cb->args[0]; s_idx = idx = cb->args[1]; for(h = 0; h <= dn_rt_hash_mask; h++) { if (h < s_h) continue; if (h > s_h) s_idx = 0; rcu_read_lock_bh(); |
a898def29 net: Add checking... |
1626 |
for(rt = rcu_dereference_bh(dn_rt_hash_table[h].chain), idx = 0; |
1da177e4c Linux-2.6.12-rc2 |
1627 |
rt; |
d8d1f30b9 net-next: remove ... |
1628 |
rt = rcu_dereference_bh(rt->dst.dn_next), idx++) { |
1da177e4c Linux-2.6.12-rc2 |
1629 1630 |
if (idx < s_idx) continue; |
d8d1f30b9 net-next: remove ... |
1631 |
skb_dst_set(skb, dst_clone(&rt->dst)); |
1da177e4c Linux-2.6.12-rc2 |
1632 |
if (dn_rt_fill_info(skb, NETLINK_CB(cb->skb).pid, |
429eb0fae [NET] DECNET: Fix... |
1633 |
cb->nlh->nlmsg_seq, RTM_NEWROUTE, |
b6544c0b4 [NETLINK]: Correc... |
1634 |
1, NLM_F_MULTI) <= 0) { |
adf30907d net: skb->dst acc... |
1635 |
skb_dst_drop(skb); |
1da177e4c Linux-2.6.12-rc2 |
1636 1637 1638 |
rcu_read_unlock_bh(); goto done; } |
adf30907d net: skb->dst acc... |
1639 |
skb_dst_drop(skb); |
1da177e4c Linux-2.6.12-rc2 |
1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 |
} rcu_read_unlock_bh(); } done: cb->args[0] = h; cb->args[1] = idx; return skb->len; } #ifdef CONFIG_PROC_FS struct dn_rt_cache_iter_state { int bucket; }; static struct dn_route *dn_rt_cache_get_first(struct seq_file *seq) { struct dn_route *rt = NULL; struct dn_rt_cache_iter_state *s = seq->private; for(s->bucket = dn_rt_hash_mask; s->bucket >= 0; --s->bucket) { rcu_read_lock_bh(); |
a898def29 net: Add checking... |
1662 |
rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain); |
1da177e4c Linux-2.6.12-rc2 |
1663 1664 1665 1666 |
if (rt) break; rcu_read_unlock_bh(); } |
a898def29 net: Add checking... |
1667 |
return rt; |
1da177e4c Linux-2.6.12-rc2 |
1668 1669 1670 1671 |
} static struct dn_route *dn_rt_cache_get_next(struct seq_file *seq, struct dn_route *rt) { |
0d89d7944 [DECNET] ROUTE: f... |
1672 |
struct dn_rt_cache_iter_state *s = seq->private; |
1da177e4c Linux-2.6.12-rc2 |
1673 |
|
fc766e4c4 decnet: RCU conve... |
1674 1675 |
rt = rcu_dereference_bh(rt->dst.dn_next); while (!rt) { |
1da177e4c Linux-2.6.12-rc2 |
1676 1677 1678 1679 |
rcu_read_unlock_bh(); if (--s->bucket < 0) break; rcu_read_lock_bh(); |
fc766e4c4 decnet: RCU conve... |
1680 |
rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain); |
1da177e4c Linux-2.6.12-rc2 |
1681 |
} |
fc766e4c4 decnet: RCU conve... |
1682 |
return rt; |
1da177e4c Linux-2.6.12-rc2 |
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 |
} static void *dn_rt_cache_seq_start(struct seq_file *seq, loff_t *pos) { struct dn_route *rt = dn_rt_cache_get_first(seq); if (rt) { while(*pos && (rt = dn_rt_cache_get_next(seq, rt))) --*pos; } return *pos ? NULL : rt; } static void *dn_rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct dn_route *rt = dn_rt_cache_get_next(seq, v); ++*pos; return rt; } static void dn_rt_cache_seq_stop(struct seq_file *seq, void *v) { if (v) rcu_read_unlock_bh(); } static int dn_rt_cache_seq_show(struct seq_file *seq, void *v) { struct dn_route *rt = v; char buf1[DN_ASCBUF_LEN], buf2[DN_ASCBUF_LEN]; seq_printf(seq, "%-8s %-7s %-7s %04d %04d %04d ", |
d8d1f30b9 net-next: remove ... |
1716 |
rt->dst.dev ? rt->dst.dev->name : "*", |
c4106aa88 decnet: remove pr... |
1717 1718 |
dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1), dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2), |
d8d1f30b9 net-next: remove ... |
1719 1720 1721 |
atomic_read(&rt->dst.__refcnt), rt->dst.__use, (int) dst_metric(&rt->dst, RTAX_RTT)); |
1da177e4c Linux-2.6.12-rc2 |
1722 |
return 0; |
429eb0fae [NET] DECNET: Fix... |
1723 |
} |
1da177e4c Linux-2.6.12-rc2 |
1724 |
|
56b3d975b [NET]: Make all i... |
1725 |
static const struct seq_operations dn_rt_cache_seq_ops = { |
1da177e4c Linux-2.6.12-rc2 |
1726 1727 1728 1729 1730 1731 1732 1733 |
.start = dn_rt_cache_seq_start, .next = dn_rt_cache_seq_next, .stop = dn_rt_cache_seq_stop, .show = dn_rt_cache_seq_show, }; static int dn_rt_cache_seq_open(struct inode *inode, struct file *file) { |
31164088d [DECNET]: Make de... |
1734 1735 |
return seq_open_private(file, &dn_rt_cache_seq_ops, sizeof(struct dn_rt_cache_iter_state)); |
1da177e4c Linux-2.6.12-rc2 |
1736 |
} |
9a32144e9 [PATCH] mark stru... |
1737 |
static const struct file_operations dn_rt_cache_seq_fops = { |
1da177e4c Linux-2.6.12-rc2 |
1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 |
.owner = THIS_MODULE, .open = dn_rt_cache_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_private, }; #endif /* CONFIG_PROC_FS */ void __init dn_route_init(void) { int i, goal, order; |
e5d679f33 [NET]: Use SLAB_P... |
1750 1751 |
dn_dst_ops.kmem_cachep = kmem_cache_create("dn_dst_cache", sizeof(struct dn_route), 0, |
20c2df83d mm: Remove slab d... |
1752 |
SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); |
fc66f95c6 net dst: use a pe... |
1753 |
dst_entries_init(&dn_dst_ops); |
b24b8a247 [NET]: Convert in... |
1754 |
setup_timer(&dn_route_timer, dn_dst_check_expire, 0); |
1da177e4c Linux-2.6.12-rc2 |
1755 1756 |
dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ; add_timer(&dn_route_timer); |
4481374ce mm: replace vario... |
1757 |
goal = totalram_pages >> (26 - PAGE_SHIFT); |
1da177e4c Linux-2.6.12-rc2 |
1758 1759 1760 |
for(order = 0; (1UL << order) < goal; order++) /* NOTHING */; |
429eb0fae [NET] DECNET: Fix... |
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 |
/* * Only want 1024 entries max, since the table is very, very unlikely * to be larger than that. */ while(order && ((((1UL << order) * PAGE_SIZE) / sizeof(struct dn_rt_hash_bucket)) >= 2048)) order--; do { dn_rt_hash_mask = (1UL << order) * PAGE_SIZE / sizeof(struct dn_rt_hash_bucket); while(dn_rt_hash_mask & (dn_rt_hash_mask - 1)) dn_rt_hash_mask--; dn_rt_hash_table = (struct dn_rt_hash_bucket *) __get_free_pages(GFP_ATOMIC, order); } while (dn_rt_hash_table == NULL && --order > 0); |
1da177e4c Linux-2.6.12-rc2 |
1777 1778 |
if (!dn_rt_hash_table) |
429eb0fae [NET] DECNET: Fix... |
1779 1780 |
panic("Failed to allocate DECnet route cache hash table "); |
1da177e4c Linux-2.6.12-rc2 |
1781 |
|
429eb0fae [NET] DECNET: Fix... |
1782 1783 1784 1785 |
printk(KERN_INFO "DECnet: Routing cache hash table of %u buckets, %ldKbytes ", dn_rt_hash_mask, |
1da177e4c Linux-2.6.12-rc2 |
1786 1787 1788 |
(long)(dn_rt_hash_mask*sizeof(struct dn_rt_hash_bucket))/1024); dn_rt_hash_mask--; |
429eb0fae [NET] DECNET: Fix... |
1789 1790 1791 1792 |
for(i = 0; i <= dn_rt_hash_mask; i++) { spin_lock_init(&dn_rt_hash_table[i].lock); dn_rt_hash_table[i].chain = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
1793 |
|
429eb0fae [NET] DECNET: Fix... |
1794 |
dn_dst_ops.gc_thresh = (dn_rt_hash_mask + 1); |
1da177e4c Linux-2.6.12-rc2 |
1795 |
|
457c4cbc5 [NET]: Make /proc... |
1796 |
proc_net_fops_create(&init_net, "decnet_cache", S_IRUGO, &dn_rt_cache_seq_fops); |
fa34ddd73 [DECNet]: Use rtn... |
1797 1798 |
#ifdef CONFIG_DECNET_ROUTER |
c7ac8679b rtnetlink: Comput... |
1799 1800 |
rtnl_register(PF_DECnet, RTM_GETROUTE, dn_cache_getroute, dn_fib_dump, NULL); |
fa34ddd73 [DECNet]: Use rtn... |
1801 1802 |
#else rtnl_register(PF_DECnet, RTM_GETROUTE, dn_cache_getroute, |
c7ac8679b rtnetlink: Comput... |
1803 |
dn_cache_dump, NULL); |
fa34ddd73 [DECNet]: Use rtn... |
1804 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
1805 1806 1807 1808 1809 1810 |
} void __exit dn_route_cleanup(void) { del_timer(&dn_route_timer); dn_run_flush(0); |
457c4cbc5 [NET]: Make /proc... |
1811 |
proc_net_remove(&init_net, "decnet_cache"); |
fc66f95c6 net dst: use a pe... |
1812 |
dst_entries_destroy(&dn_dst_ops); |
1da177e4c Linux-2.6.12-rc2 |
1813 |
} |