SOURCES (LINUX_2_6): kernel-routes-2.6.22-15.diff (NEW) - http://w...
mguevara
mguevara at pld-linux.org
Tue Aug 7 17:21:54 CEST 2007
Author: mguevara Date: Tue Aug 7 15:21:54 2007 GMT
Module: SOURCES Tag: LINUX_2_6
---- Log message:
- http://www.ssi.bg/~ja/routes-2.6.22-15.diff
---- Files affected:
SOURCES:
kernel-routes-2.6.22-15.diff (NONE -> 1.1.2.1) (NEW)
---- Diffs:
================================================================
Index: SOURCES/kernel-routes-2.6.22-15.diff
diff -u /dev/null SOURCES/kernel-routes-2.6.22-15.diff:1.1.2.1
--- /dev/null Tue Aug 7 17:21:54 2007
+++ SOURCES/kernel-routes-2.6.22-15.diff Tue Aug 7 17:21:49 2007
@@ -0,0 +1,1244 @@
+diff -urp v2.6.22/linux/include/linux/rtnetlink.h linux/include/linux/rtnetlink.h
+--- v2.6.22/linux/include/linux/rtnetlink.h 2007-07-10 09:18:42.000000000 +0300
++++ linux/include/linux/rtnetlink.h 2007-07-12 08:00:54.000000000 +0300
+@@ -293,6 +293,8 @@ struct rtnexthop
+ #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
+ #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
+ #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
++#define RTNH_F_SUSPECT 8 /* We don't know the real state */
++#define RTNH_F_BADSTATE (RTNH_F_DEAD | RTNH_F_SUSPECT)
+
+ /* Macros to handle hexthops */
+
+diff -urp v2.6.22/linux/include/net/flow.h linux/include/net/flow.h
+--- v2.6.22/linux/include/net/flow.h 2007-07-10 09:18:42.000000000 +0300
++++ linux/include/net/flow.h 2007-07-12 08:00:54.000000000 +0300
+@@ -19,6 +19,8 @@ struct flowi {
+ struct {
+ __be32 daddr;
+ __be32 saddr;
++ __be32 lsrc;
++ __be32 gw;
+ __u8 tos;
+ __u8 scope;
+ } ip4_u;
+@@ -43,6 +45,8 @@ struct flowi {
+ #define fl6_flowlabel nl_u.ip6_u.flowlabel
+ #define fl4_dst nl_u.ip4_u.daddr
+ #define fl4_src nl_u.ip4_u.saddr
++#define fl4_lsrc nl_u.ip4_u.lsrc
++#define fl4_gw nl_u.ip4_u.gw
+ #define fl4_tos nl_u.ip4_u.tos
+ #define fl4_scope nl_u.ip4_u.scope
+
+diff -urp v2.6.22/linux/include/net/ip_fib.h linux/include/net/ip_fib.h
+--- v2.6.22/linux/include/net/ip_fib.h 2007-07-10 09:18:42.000000000 +0300
++++ linux/include/net/ip_fib.h 2007-07-12 08:00:54.000000000 +0300
+@@ -196,7 +196,8 @@ static inline int fib_lookup(const struc
+
+ static inline void fib_select_default(const struct flowi *flp, struct fib_result *res)
+ {
+- if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
++ if ((FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) ||
++ FIB_RES_NH(*res).nh_scope == RT_SCOPE_HOST)
+ ip_fib_main_table->tb_select_default(ip_fib_main_table, flp, res);
+ }
+
+@@ -209,6 +210,7 @@ extern int fib_lookup(struct flowi *flp,
+ extern struct fib_table *fib_new_table(u32 id);
+ extern struct fib_table *fib_get_table(u32 id);
+ extern void fib_select_default(const struct flowi *flp, struct fib_result *res);
++extern int fib_result_table(struct fib_result *res);
+
+ #endif /* CONFIG_IP_MULTIPLE_TABLES */
+
+@@ -278,4 +280,6 @@ extern int fib_proc_init(void);
+ extern void fib_proc_exit(void);
+ #endif
+
++extern rwlock_t fib_nhflags_lock;
++
+ #endif /* _NET_FIB_H */
+diff -urp v2.6.22/linux/include/net/netfilter/nf_nat.h linux/include/net/netfilter/nf_nat.h
+--- v2.6.22/linux/include/net/netfilter/nf_nat.h 2007-04-28 17:55:11.000000000 +0300
++++ linux/include/net/netfilter/nf_nat.h 2007-07-12 08:00:54.000000000 +0300
+@@ -61,6 +61,13 @@ struct nf_nat_info
+
+ struct nf_conn;
+
++/* Call input routing for SNAT-ed traffic */
++extern unsigned int ip_nat_route_input(unsigned int hooknum,
++ struct sk_buff **pskb,
++ const struct net_device *in,
++ const struct net_device *out,
++ int (*okfn)(struct sk_buff *));
++
+ /* Set up the info structure to map into this range. */
+ extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
+ const struct nf_nat_range *range,
+diff -urp v2.6.22/linux/include/net/route.h linux/include/net/route.h
+--- v2.6.22/linux/include/net/route.h 2007-04-28 17:55:11.000000000 +0300
++++ linux/include/net/route.h 2007-07-12 08:00:54.000000000 +0300
+@@ -116,6 +116,7 @@ extern int __ip_route_output_key(struct
+ extern int ip_route_output_key(struct rtable **, struct flowi *flp);
+ extern int ip_route_output_flow(struct rtable **rp, struct flowi *flp, struct sock *sk, int flags);
+ extern int ip_route_input(struct sk_buff*, __be32 dst, __be32 src, u8 tos, struct net_device *devin);
++extern int ip_route_input_lookup(struct sk_buff*, __be32 dst, __be32 src, u8 tos, struct net_device *devin, __be32 lsrc);
+ extern unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu);
+ extern void ip_rt_send_redirect(struct sk_buff *skb);
+
+diff -urp v2.6.22/linux/net/bridge/br_netfilter.c linux/net/bridge/br_netfilter.c
+--- v2.6.22/linux/net/bridge/br_netfilter.c 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/bridge/br_netfilter.c 2007-07-12 08:00:54.000000000 +0300
+@@ -301,6 +301,10 @@ static int br_nf_pre_routing_finish(stru
+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ int err;
+
++ /* Old skb->dst is not expected, it is lost in all cases */
++ dst_release(skb->dst);
++ skb->dst = NULL;
++
+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->mask ^= BRNF_PKT_TYPE;
+diff -urp v2.6.22/linux/net/ipv4/fib_frontend.c linux/net/ipv4/fib_frontend.c
+--- v2.6.22/linux/net/ipv4/fib_frontend.c 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/ipv4/fib_frontend.c 2007-07-12 08:00:54.000000000 +0300
+@@ -57,8 +57,12 @@ struct fib_table *ip_fib_main_table;
+ #define FIB_TABLE_HASHSZ 1
+ static struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ];
+
++#define FIB_RES_TABLE(r) (RT_TABLE_MAIN)
++
+ #else
+
++#define FIB_RES_TABLE(r) (fib_result_table(r))
++
+ #define FIB_TABLE_HASHSZ 256
+ static struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ];
+
+@@ -189,6 +193,9 @@ int fib_validate_source(__be32 src, __be
+ .tos = tos } },
+ .iif = oif };
+ struct fib_result res;
++ int table;
++ unsigned char prefixlen;
++ unsigned char scope;
+ int no_addr, rpf;
+ int ret;
+
+@@ -210,31 +217,35 @@ int fib_validate_source(__be32 src, __be
+ goto e_inval_res;
+ *spec_dst = FIB_RES_PREFSRC(res);
+ fib_combine_itag(itag, &res);
+-#ifdef CONFIG_IP_ROUTE_MULTIPATH
+- if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1)
+-#else
+ if (FIB_RES_DEV(res) == dev)
+-#endif
+ {
+ ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
+ fib_res_put(&res);
+ return ret;
+ }
++ table = FIB_RES_TABLE(&res);
++ prefixlen = res.prefixlen;
++ scope = res.scope;
+ fib_res_put(&res);
+ if (no_addr)
+ goto last_resort;
+- if (rpf)
+- goto e_inval;
+ fl.oif = dev->ifindex;
+
+ ret = 0;
+ if (fib_lookup(&fl, &res) == 0) {
+- if (res.type == RTN_UNICAST) {
++ if (res.type == RTN_UNICAST &&
++ ((table == FIB_RES_TABLE(&res) &&
++ res.prefixlen >= prefixlen && res.scope >= scope) ||
++ !rpf)) {
+ *spec_dst = FIB_RES_PREFSRC(res);
+ ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
++ fib_res_put(&res);
++ return ret;
+ }
+ fib_res_put(&res);
+ }
++ if (rpf)
++ goto e_inval;
+ return ret;
+
+ last_resort:
+@@ -839,9 +850,7 @@ static int fib_inetaddr_event(struct not
+ switch (event) {
+ case NETDEV_UP:
+ fib_add_ifaddr(ifa);
+-#ifdef CONFIG_IP_ROUTE_MULTIPATH
+ fib_sync_up(ifa->ifa_dev->dev);
+-#endif
+ rt_cache_flush(-1);
+ break;
+ case NETDEV_DOWN:
+@@ -877,9 +886,7 @@ static int fib_netdev_event(struct notif
+ for_ifa(in_dev) {
+ fib_add_ifaddr(ifa);
+ } endfor_ifa(in_dev);
+-#ifdef CONFIG_IP_ROUTE_MULTIPATH
+ fib_sync_up(dev);
+-#endif
+ rt_cache_flush(-1);
+ break;
+ case NETDEV_DOWN:
+diff -urp v2.6.22/linux/net/ipv4/fib_hash.c linux/net/ipv4/fib_hash.c
+--- v2.6.22/linux/net/ipv4/fib_hash.c 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/ipv4/fib_hash.c 2007-07-12 08:00:54.000000000 +0300
+@@ -274,30 +274,38 @@ out:
+ return err;
+ }
+
+-static int fn_hash_last_dflt=-1;
+-
+ static void
+ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
+ {
+- int order, last_idx;
++ int order, last_idx, last_dflt, last_nhsel;
++ struct fib_alias *first_fa = NULL;
++ struct hlist_head *head;
+ struct hlist_node *node;
+ struct fib_node *f;
+ struct fib_info *fi = NULL;
+ struct fib_info *last_resort;
+ struct fn_hash *t = (struct fn_hash*)tb->tb_data;
+- struct fn_zone *fz = t->fn_zones[0];
++ struct fn_zone *fz = t->fn_zones[res->prefixlen];
++ __be32 k;
+
+ if (fz == NULL)
+ return;
+
++ k = fz_key(flp->fl4_dst, fz);
++ last_dflt = -2;
++ last_nhsel = 0;
+ last_idx = -1;
+ last_resort = NULL;
+ order = -1;
+
+ read_lock(&fib_hash_lock);
+- hlist_for_each_entry(f, node, &fz->fz_hash[0], fn_hash) {
++ head = &fz->fz_hash[fn_hash(k, fz)];
++ hlist_for_each_entry(f, node, head, fn_hash) {
+ struct fib_alias *fa;
+
++ if (f->fn_key != k)
++ continue;
++
+ list_for_each_entry(fa, &f->fn_alias, fa_list) {
+ struct fib_info *next_fi = fa->fa_info;
+
+@@ -305,41 +313,52 @@ fn_hash_select_default(struct fib_table
+ fa->fa_type != RTN_UNICAST)
+ continue;
+
++ if (fa->fa_tos &&
++ fa->fa_tos != flp->fl4_tos)
++ continue;
+ if (next_fi->fib_priority > res->fi->fib_priority)
+ break;
+- if (!next_fi->fib_nh[0].nh_gw ||
+- next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK)
+- continue;
+ fa->fa_state |= FA_S_ACCESSED;
+
+- if (fi == NULL) {
+- if (next_fi != res->fi)
+- break;
+- } else if (!fib_detect_death(fi, order, &last_resort,
+- &last_idx, &fn_hash_last_dflt)) {
++ if (!first_fa) {
++ last_dflt = fa->fa_last_dflt;
++ first_fa = fa;
++ }
++ if (fi && !fib_detect_death(fi, order, &last_resort,
++ &last_idx, &last_dflt, &last_nhsel, flp)) {
+ if (res->fi)
+ fib_info_put(res->fi);
+ res->fi = fi;
+ atomic_inc(&fi->fib_clntref);
+- fn_hash_last_dflt = order;
++ first_fa->fa_last_dflt = order;
+ goto out;
+ }
+ fi = next_fi;
+ order++;
+ }
++ break;
+ }
+
+ if (order <= 0 || fi == NULL) {
+- fn_hash_last_dflt = -1;
++ if (fi && fi->fib_nhs > 1 &&
++ fib_detect_death(fi, order, &last_resort, &last_idx,
++ &last_dflt, &last_nhsel, flp) &&
++ last_resort == fi) {
++ read_lock_bh(&fib_nhflags_lock);
++ fi->fib_nh[last_nhsel].nh_flags &= ~RTNH_F_SUSPECT;
++ read_unlock_bh(&fib_nhflags_lock);
++ }
++ if (first_fa) first_fa->fa_last_dflt = -1;
+ goto out;
+ }
+
+- if (!fib_detect_death(fi, order, &last_resort, &last_idx, &fn_hash_last_dflt)) {
++ if (!fib_detect_death(fi, order, &last_resort, &last_idx,
++ &last_dflt, &last_nhsel, flp)) {
+ if (res->fi)
+ fib_info_put(res->fi);
+ res->fi = fi;
+ atomic_inc(&fi->fib_clntref);
+- fn_hash_last_dflt = order;
++ first_fa->fa_last_dflt = order;
+ goto out;
+ }
+
+@@ -349,8 +368,11 @@ fn_hash_select_default(struct fib_table
+ res->fi = last_resort;
+ if (last_resort)
+ atomic_inc(&last_resort->fib_clntref);
++ read_lock_bh(&fib_nhflags_lock);
++ last_resort->fib_nh[last_nhsel].nh_flags &= ~RTNH_F_SUSPECT;
++ read_unlock_bh(&fib_nhflags_lock);
++ first_fa->fa_last_dflt = last_idx;
+ }
+- fn_hash_last_dflt = last_idx;
+ out:
+ read_unlock(&fib_hash_lock);
+ }
+@@ -446,6 +468,7 @@ static int fn_hash_insert(struct fib_tab
+ write_lock_bh(&fib_hash_lock);
+ fi_drop = fa->fa_info;
+ fa->fa_info = fi;
++ fa->fa_last_dflt = -1;
+ fa->fa_type = cfg->fc_type;
+ fa->fa_scope = cfg->fc_scope;
+ state = fa->fa_state;
+@@ -507,6 +530,7 @@ static int fn_hash_insert(struct fib_tab
+ new_fa->fa_type = cfg->fc_type;
+ new_fa->fa_scope = cfg->fc_scope;
+ new_fa->fa_state = 0;
++ new_fa->fa_last_dflt = -1;
+
+ /*
+ * Insert new entry to the list.
+diff -urp v2.6.22/linux/net/ipv4/fib_lookup.h linux/net/ipv4/fib_lookup.h
+--- v2.6.22/linux/net/ipv4/fib_lookup.h 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/ipv4/fib_lookup.h 2007-07-12 08:00:54.000000000 +0300
+@@ -9,6 +9,7 @@ struct fib_alias {
+ struct list_head fa_list;
+ struct rcu_head rcu;
+ struct fib_info *fa_info;
++ int fa_last_dflt;
+ u8 fa_tos;
+ u8 fa_type;
+ u8 fa_scope;
+@@ -36,6 +37,7 @@ extern struct fib_alias *fib_find_alias(
+ u8 tos, u32 prio);
+ extern int fib_detect_death(struct fib_info *fi, int order,
+ struct fib_info **last_resort,
+- int *last_idx, int *dflt);
++ int *last_idx, int *dflt, int *last_nhsel,
++ const struct flowi *flp);
+
+ #endif /* _FIB_LOOKUP_H */
+diff -urp v2.6.22/linux/net/ipv4/fib_rules.c linux/net/ipv4/fib_rules.c
+--- v2.6.22/linux/net/ipv4/fib_rules.c 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/ipv4/fib_rules.c 2007-07-12 08:00:54.000000000 +0300
+@@ -85,6 +85,11 @@ u32 fib_rules_tclass(struct fib_result *
+ }
+ #endif
+
++int fib_result_table(struct fib_result *res)
++{
++ return res->r->table;
++}
++
+ int fib_lookup(struct flowi *flp, struct fib_result *res)
+ {
+ struct fib_lookup_arg arg = {
+@@ -136,7 +141,8 @@ errout:
+ void fib_select_default(const struct flowi *flp, struct fib_result *res)
+ {
+ if (res->r && res->r->action == FR_ACT_TO_TBL &&
+- FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) {
++ ((FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) ||
++ FIB_RES_NH(*res).nh_scope == RT_SCOPE_HOST)) {
+ struct fib_table *tb;
+ if ((tb = fib_get_table(res->r->table)) != NULL)
+ tb->tb_select_default(tb, flp, res);
+diff -urp v2.6.22/linux/net/ipv4/fib_semantics.c linux/net/ipv4/fib_semantics.c
+--- v2.6.22/linux/net/ipv4/fib_semantics.c 2007-07-10 09:18:43.000000000 +0300
++++ linux/net/ipv4/fib_semantics.c 2007-07-12 08:00:54.000000000 +0300
+@@ -55,6 +55,7 @@ static struct hlist_head *fib_info_hash;
+ static struct hlist_head *fib_info_laddrhash;
+ static unsigned int fib_hash_size;
+ static unsigned int fib_info_cnt;
++rwlock_t fib_nhflags_lock = RW_LOCK_UNLOCKED;
+
+ #define DEVINDEX_HASHBITS 8
+ #define DEVINDEX_HASHSIZE (1U << DEVINDEX_HASHBITS)
+@@ -190,7 +191,7 @@ static __inline__ int nh_comp(const stru
+ #ifdef CONFIG_NET_CLS_ROUTE
+ nh->nh_tclassid != onh->nh_tclassid ||
+ #endif
+- ((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
++ ((nh->nh_flags^onh->nh_flags)&~RTNH_F_BADSTATE))
+ return -1;
+ onh++;
+ } endfor_nexthops(fi);
+@@ -227,7 +228,7 @@ static struct fib_info *fib_find_info(co
+ nfi->fib_priority == fi->fib_priority &&
+ memcmp(nfi->fib_metrics, fi->fib_metrics,
+ sizeof(fi->fib_metrics)) == 0 &&
+- ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
++ ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_BADSTATE) == 0 &&
+ (nfi->fib_nhs == 0 || nh_comp(fi, nfi) == 0))
+ return fi;
+ }
+@@ -347,26 +348,70 @@ struct fib_alias *fib_find_alias(struct
+ }
+
+ int fib_detect_death(struct fib_info *fi, int order,
+- struct fib_info **last_resort, int *last_idx, int *dflt)
++ struct fib_info **last_resort, int *last_idx, int *dflt,
++ int *last_nhsel, const struct flowi *flp)
+ {
+ struct neighbour *n;
+- int state = NUD_NONE;
++ int nhsel;
++ int state;
++ struct fib_nh * nh;
++ __be32 dst;
++ int flag, dead = 1;
++
++ /* change_nexthops(fi) { */
++ for (nhsel = 0, nh = fi->fib_nh; nhsel < fi->fib_nhs; nh++, nhsel++) {
++ if (flp->oif && flp->oif != nh->nh_oif)
++ continue;
++ if (flp->fl4_gw && flp->fl4_gw != nh->nh_gw && nh->nh_gw &&
++ nh->nh_scope == RT_SCOPE_LINK)
++ continue;
++ if (nh->nh_flags & RTNH_F_DEAD)
++ continue;
+
+- n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].nh_gw, fi->fib_dev);
+- if (n) {
+- state = n->nud_state;
+- neigh_release(n);
+- }
+- if (state==NUD_REACHABLE)
+- return 0;
+- if ((state&NUD_VALID) && order != *dflt)
+- return 0;
+- if ((state&NUD_VALID) ||
+- (*last_idx<0 && order > *dflt)) {
+- *last_resort = fi;
+- *last_idx = order;
++ flag = 0;
++ if (nh->nh_dev->flags & IFF_NOARP) {
++ dead = 0;
++ goto setfl;
++ }
++
++ dst = nh->nh_gw;
++ if (!nh->nh_gw || nh->nh_scope != RT_SCOPE_LINK)
++ dst = flp->fl4_dst;
++
++ state = NUD_NONE;
++ n = neigh_lookup(&arp_tbl, &dst, nh->nh_dev);
++ if (n) {
++ state = n->nud_state;
++ neigh_release(n);
++ }
++ if (state==NUD_REACHABLE ||
++ ((state&NUD_VALID) && order != *dflt)) {
++ dead = 0;
++ goto setfl;
++ }
++ if (!(state&NUD_VALID))
++ flag = 1;
++ if (!dead)
++ goto setfl;
++ if ((state&NUD_VALID) ||
++ (*last_idx<0 && order >= *dflt)) {
++ *last_resort = fi;
++ *last_idx = order;
++ *last_nhsel = nhsel;
++ }
++
++ setfl:
++
++ read_lock_bh(&fib_nhflags_lock);
++ if (flag)
++ nh->nh_flags |= RTNH_F_SUSPECT;
++ else
++ nh->nh_flags &= ~RTNH_F_SUSPECT;
++ read_unlock_bh(&fib_nhflags_lock);
+ }
+- return 1;
++ /* } endfor_nexthops(fi) */
++
++ return dead;
+ }
+
+ #ifdef CONFIG_IP_ROUTE_MULTIPATH
+@@ -536,8 +581,11 @@ static int fib_check_nh(struct fib_confi
+ return -EINVAL;
+ if ((dev = __dev_get_by_index(nh->nh_oif)) == NULL)
+ return -ENODEV;
+- if (!(dev->flags&IFF_UP))
+- return -ENETDOWN;
++ if (!(dev->flags&IFF_UP)) {
++ if (fi->fib_protocol != RTPROT_STATIC)
++ return -ENETDOWN;
++ nh->nh_flags |= RTNH_F_DEAD;
++ }
+ nh->nh_dev = dev;
+ dev_hold(dev);
+ nh->nh_scope = RT_SCOPE_LINK;
+@@ -557,24 +605,48 @@ static int fib_check_nh(struct fib_confi
+ /* It is not necessary, but requires a bit of thinking */
+ if (fl.fl4_scope < RT_SCOPE_LINK)
+ fl.fl4_scope = RT_SCOPE_LINK;
+- if ((err = fib_lookup(&fl, &res)) != 0)
+- return err;
++ err = fib_lookup(&fl, &res);
+ }
+- err = -EINVAL;
+- if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
+- goto out;
+- nh->nh_scope = res.scope;
+- nh->nh_oif = FIB_RES_OIF(res);
+- if ((nh->nh_dev = FIB_RES_DEV(res)) == NULL)
+- goto out;
+- dev_hold(nh->nh_dev);
+- err = -ENETDOWN;
+- if (!(nh->nh_dev->flags & IFF_UP))
+- goto out;
+- err = 0;
++ if (err) {
++ struct in_device *in_dev;
++
++ if (err != -ENETUNREACH ||
++ fi->fib_protocol != RTPROT_STATIC)
++ return err;
++
++ in_dev = inetdev_by_index(nh->nh_oif);
++ if (in_dev == NULL ||
++ in_dev->dev->flags & IFF_UP) {
++ if (in_dev)
++ in_dev_put(in_dev);
++ return err;
++ }
++ nh->nh_flags |= RTNH_F_DEAD;
++ nh->nh_scope = RT_SCOPE_LINK;
++ nh->nh_dev = in_dev->dev;
++ dev_hold(nh->nh_dev);
++ in_dev_put(in_dev);
++ } else {
++ err = -EINVAL;
++ if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
++ goto out;
++ nh->nh_scope = res.scope;
++ nh->nh_oif = FIB_RES_OIF(res);
++ if ((nh->nh_dev = FIB_RES_DEV(res)) == NULL)
++ goto out;
++ dev_hold(nh->nh_dev);
++ if (!(nh->nh_dev->flags & IFF_UP)) {
++ if (fi->fib_protocol != RTPROT_STATIC) {
++ err = -ENETDOWN;
++ goto out;
++ }
++ nh->nh_flags |= RTNH_F_DEAD;
++ }
++ err = 0;
+ out:
+- fib_res_put(&res);
+- return err;
++ fib_res_put(&res);
++ return err;
++ }
+ } else {
+ struct in_device *in_dev;
+
+@@ -585,8 +657,11 @@ out:
+ if (in_dev == NULL)
+ return -ENODEV;
+ if (!(in_dev->dev->flags&IFF_UP)) {
+- in_dev_put(in_dev);
+- return -ENETDOWN;
++ if (fi->fib_protocol != RTPROT_STATIC) {
++ in_dev_put(in_dev);
++ return -ENETDOWN;
++ }
++ nh->nh_flags |= RTNH_F_DEAD;
+ }
+ nh->nh_dev = in_dev->dev;
+ dev_hold(nh->nh_dev);
+@@ -909,8 +984,12 @@ int fib_semantic_match(struct list_head
+ for_nexthops(fi) {
+ if (nh->nh_flags&RTNH_F_DEAD)
+ continue;
<<Diff was trimmed, longer than 597 lines>>
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