summaryrefslogtreecommitdiffstats
path: root/net/ipv4
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/af_inet.c6
-rw-r--r--net/ipv4/fib_frontend.c12
-rw-r--r--net/ipv4/fib_lookup.h1
-rw-r--r--net/ipv4/fib_semantics.c650
-rw-r--r--net/ipv4/fib_trie.c33
-rw-r--r--net/ipv4/fou.c142
-rw-r--r--net/ipv4/ip_output.c7
-rw-r--r--net/ipv4/route.c82
-rw-r--r--net/ipv4/syncookies.c17
-rw-r--r--net/ipv4/sysctl_net_ipv4.c9
-rw-r--r--net/ipv4/tcp.c49
-rw-r--r--net/ipv4/tcp_input.c12
-rw-r--r--net/ipv4/tcp_ipv4.c11
-rw-r--r--net/ipv4/tcp_metrics.c3
-rw-r--r--net/ipv4/tcp_output.c8
15 files changed, 643 insertions, 399 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index eab3ebde981e..08a8430f5647 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -136,6 +136,10 @@ void inet_sock_destruct(struct sock *sk)
struct inet_sock *inet = inet_sk(sk);
__skb_queue_purge(&sk->sk_receive_queue);
+ if (sk->sk_rx_skb_cache) {
+ __kfree_skb(sk->sk_rx_skb_cache);
+ sk->sk_rx_skb_cache = NULL;
+ }
__skb_queue_purge(&sk->sk_error_queue);
sk_mem_reclaim(sk);
@@ -156,7 +160,7 @@ void inet_sock_destruct(struct sock *sk)
WARN_ON(sk->sk_forward_alloc);
kfree(rcu_dereference_protected(inet->inet_opt, 1));
- dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
+ dst_release(rcu_dereference_protected(sk->sk_dst_cache, 1));
dst_release(sk->sk_rx_dst);
sk_refcnt_debug_dec(sk);
}
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index ed14ec245584..15f779bd26b3 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -307,7 +307,7 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb)
.flowi4_mark = vmark ? skb->mark : 0,
};
if (!fib_lookup(net, &fl4, &res, 0))
- return FIB_RES_PREFSRC(net, res);
+ return fib_result_prefsrc(net, &res);
} else {
scope = RT_SCOPE_LINK;
}
@@ -324,16 +324,16 @@ bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev)
for (ret = 0; ret < fi->fib_nhs; ret++) {
struct fib_nh *nh = &fi->fib_nh[ret];
- if (nh->nh_dev == dev) {
+ if (nh->fib_nh_dev == dev) {
dev_match = true;
break;
- } else if (l3mdev_master_ifindex_rcu(nh->nh_dev) == dev->ifindex) {
+ } else if (l3mdev_master_ifindex_rcu(nh->fib_nh_dev) == dev->ifindex) {
dev_match = true;
break;
}
}
#else
- if (fi->fib_nh[0].nh_dev == dev)
+ if (fi->fib_nh[0].fib_nh_dev == dev)
dev_match = true;
#endif
@@ -390,7 +390,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
dev_match = fib_info_nh_uses_dev(res.fi, dev);
if (dev_match) {
- ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
+ ret = FIB_RES_NHC(res)->nhc_scope >= RT_SCOPE_HOST;
return ret;
}
if (no_addr)
@@ -402,7 +402,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
ret = 0;
if (fib_lookup(net, &fl4, &res, FIB_LOOKUP_IGNORE_LINKSTATE) == 0) {
if (res.type == RTN_UNICAST)
- ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
+ ret = FIB_RES_NHC(res)->nhc_scope >= RT_SCOPE_HOST;
}
return ret;
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index e6ff282bb7f4..7945f0534db7 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -45,6 +45,7 @@ static inline void fib_result_assign(struct fib_result *res,
{
/* we used to play games with refcounts, but we now use RCU */
res->fi = fi;
+ res->nhc = fib_info_nhc(fi, 0);
}
struct fib_prop {
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 8e185b5a2bf6..8e0cb1687a74 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -45,6 +45,7 @@
#include <net/nexthop.h>
#include <net/lwtunnel.h>
#include <net/fib_notifier.h>
+#include <net/addrconf.h>
#include "fib_lookup.h"
@@ -204,18 +205,34 @@ static void rt_fibinfo_free_cpus(struct rtable __rcu * __percpu *rtp)
free_percpu(rtp);
}
+void fib_nh_common_release(struct fib_nh_common *nhc)
+{
+ if (nhc->nhc_dev)
+ dev_put(nhc->nhc_dev);
+
+ lwtstate_put(nhc->nhc_lwtstate);
+}
+EXPORT_SYMBOL_GPL(fib_nh_common_release);
+
+void fib_nh_release(struct net *net, struct fib_nh *fib_nh)
+{
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (fib_nh->nh_tclassid)
+ net->ipv4.fib_num_tclassid_users--;
+#endif
+ fib_nh_common_release(&fib_nh->nh_common);
+ free_nh_exceptions(fib_nh);
+ rt_fibinfo_free_cpus(fib_nh->nh_pcpu_rth_output);
+ rt_fibinfo_free(&fib_nh->nh_rth_input);
+}
+
/* Release a nexthop info record */
static void free_fib_info_rcu(struct rcu_head *head)
{
struct fib_info *fi = container_of(head, struct fib_info, rcu);
change_nexthops(fi) {
- if (nexthop_nh->nh_dev)
- dev_put(nexthop_nh->nh_dev);
- lwtstate_put(nexthop_nh->nh_lwtstate);
- free_nh_exceptions(nexthop_nh);
- rt_fibinfo_free_cpus(nexthop_nh->nh_pcpu_rth_output);
- rt_fibinfo_free(&nexthop_nh->nh_rth_input);
+ fib_nh_release(fi->fib_net, nexthop_nh);
} endfor_nexthops(fi);
ip_fib_metrics_put(fi->fib_metrics);
@@ -230,12 +247,7 @@ void free_fib_info(struct fib_info *fi)
return;
}
fib_info_cnt--;
-#ifdef CONFIG_IP_ROUTE_CLASSID
- change_nexthops(fi) {
- if (nexthop_nh->nh_tclassid)
- fi->fib_net->ipv4.fib_num_tclassid_users--;
- } endfor_nexthops(fi);
-#endif
+
call_rcu(&fi->rcu, free_fib_info_rcu);
}
EXPORT_SYMBOL_GPL(free_fib_info);
@@ -248,7 +260,7 @@ void fib_release_info(struct fib_info *fi)
if (fi->fib_prefsrc)
hlist_del(&fi->fib_lhash);
change_nexthops(fi) {
- if (!nexthop_nh->nh_dev)
+ if (!nexthop_nh->fib_nh_dev)
continue;
hlist_del(&nexthop_nh->nh_hash);
} endfor_nexthops(fi)
@@ -263,17 +275,17 @@ static inline int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
const struct fib_nh *onh = ofi->fib_nh;
for_nexthops(fi) {
- if (nh->nh_oif != onh->nh_oif ||
- nh->nh_gw != onh->nh_gw ||
- nh->nh_scope != onh->nh_scope ||
+ if (nh->fib_nh_oif != onh->fib_nh_oif ||
+ nh->fib_nh_gw4 != onh->fib_nh_gw4 ||
+ nh->fib_nh_scope != onh->fib_nh_scope ||
#ifdef CONFIG_IP_ROUTE_MULTIPATH
- nh->nh_weight != onh->nh_weight ||
+ nh->fib_nh_weight != onh->fib_nh_weight ||
#endif
#ifdef CONFIG_IP_ROUTE_CLASSID
nh->nh_tclassid != onh->nh_tclassid ||
#endif
- lwtunnel_cmp_encap(nh->nh_lwtstate, onh->nh_lwtstate) ||
- ((nh->nh_flags ^ onh->nh_flags) & ~RTNH_COMPARE_MASK))
+ lwtunnel_cmp_encap(nh->fib_nh_lws, onh->fib_nh_lws) ||
+ ((nh->fib_nh_flags ^ onh->fib_nh_flags) & ~RTNH_COMPARE_MASK))
return -1;
onh++;
} endfor_nexthops(fi);
@@ -298,7 +310,7 @@ static inline unsigned int fib_info_hashfn(const struct fib_info *fi)
val ^= (__force u32)fi->fib_prefsrc;
val ^= fi->fib_priority;
for_nexthops(fi) {
- val ^= fib_devindex_hashfn(nh->nh_oif);
+ val ^= fib_devindex_hashfn(nh->fib_nh_oif);
} endfor_nexthops(fi)
return (val ^ (val >> 7) ^ (val >> 12)) & mask;
@@ -347,9 +359,9 @@ int ip_fib_check_default(__be32 gw, struct net_device *dev)
hash = fib_devindex_hashfn(dev->ifindex);
head = &fib_info_devhash[hash];
hlist_for_each_entry(nh, head, nh_hash) {
- if (nh->nh_dev == dev &&
- nh->nh_gw == gw &&
- !(nh->nh_flags & RTNH_F_DEAD)) {
+ if (nh->fib_nh_dev == dev &&
+ nh->fib_nh_gw4 == gw &&
+ !(nh->fib_nh_flags & RTNH_F_DEAD)) {
spin_unlock(&fib_info_lock);
return 0;
}
@@ -384,10 +396,10 @@ static inline size_t fib_nlmsg_size(struct fib_info *fi)
/* grab encap info */
for_nexthops(fi) {
- if (nh->nh_lwtstate) {
+ if (nh->fib_nh_lws) {
/* RTA_ENCAP_TYPE */
nh_encapsize += lwtunnel_get_encap_size(
- nh->nh_lwtstate);
+ nh->fib_nh_lws);
/* RTA_ENCAP */
nh_encapsize += nla_total_size(2);
}
@@ -438,7 +450,7 @@ static int fib_detect_death(struct fib_info *fi, int order,
struct neighbour *n;
int state = NUD_NONE;
- n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].nh_gw, fi->fib_dev);
+ n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].fib_nh_gw4, fi->fib_dev);
if (n) {
state = n->nud_state;
neigh_release(n);
@@ -457,6 +469,71 @@ static int fib_detect_death(struct fib_info *fi, int order,
return 1;
}
+int fib_nh_common_init(struct fib_nh_common *nhc, struct nlattr *encap,
+ u16 encap_type, void *cfg, gfp_t gfp_flags,
+ struct netlink_ext_ack *extack)
+{
+ if (encap) {
+ struct lwtunnel_state *lwtstate;
+ int err;
+
+ if (encap_type == LWTUNNEL_ENCAP_NONE) {
+ NL_SET_ERR_MSG(extack, "LWT encap type not specified");
+ return -EINVAL;
+ }
+ err = lwtunnel_build_state(encap_type, encap, nhc->nhc_family,
+ cfg, &lwtstate, extack);
+ if (err)
+ return err;
+
+ nhc->nhc_lwtstate = lwtstate_get(lwtstate);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fib_nh_common_init);
+
+int fib_nh_init(struct net *net, struct fib_nh *nh,
+ struct fib_config *cfg, int nh_weight,
+ struct netlink_ext_ack *extack)
+{
+ int err = -ENOMEM;
+
+ nh->fib_nh_family = AF_INET;
+
+ nh->nh_pcpu_rth_output = alloc_percpu(struct rtable __rcu *);
+ if (!nh->nh_pcpu_rth_output)
+ goto err_out;
+
+ err = fib_nh_common_init(&nh->nh_common, cfg->fc_encap,
+ cfg->fc_encap_type, cfg, GFP_KERNEL, extack);
+ if (err)
+ goto init_failure;
+
+ nh->fib_nh_oif = cfg->fc_oif;
+ if (cfg->fc_gw) {
+ nh->fib_nh_gw4 = cfg->fc_gw;
+ nh->fib_nh_has_gw = 1;
+ }
+ nh->fib_nh_flags = cfg->fc_flags;
+
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ nh->nh_tclassid = cfg->fc_flow;
+ if (nh->nh_tclassid)
+ net->ipv4.fib_num_tclassid_users++;
+#endif
+#ifdef CONFIG_IP_ROUTE_MULTIPATH
+ nh->fib_nh_weight = nh_weight;
+#endif
+ return 0;
+
+init_failure:
+ rt_fibinfo_free_cpus(nh->nh_pcpu_rth_output);
+ nh->nh_pcpu_rth_output = NULL;
+err_out:
+ return err;
+}
+
#ifdef CONFIG_IP_ROUTE_MULTIPATH
static int fib_count_nexthops(struct rtnexthop *rtnh, int remaining,
@@ -483,11 +560,15 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
int remaining, struct fib_config *cfg,
struct netlink_ext_ack *extack)
{
+ struct net *net = fi->fib_net;
+ struct fib_config fib_cfg;
int ret;
change_nexthops(fi) {
int attrlen;
+ memset(&fib_cfg, 0, sizeof(fib_cfg));
+
if (!rtnh_ok(rtnh, remaining)) {
NL_SET_ERR_MSG(extack,
"Invalid nexthop configuration - extra data after nexthop");
@@ -500,56 +581,54 @@ static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
return -EINVAL;
}
- nexthop_nh->nh_flags =
- (cfg->fc_flags & ~0xFF) | rtnh->rtnh_flags;
- nexthop_nh->nh_oif = rtnh->rtnh_ifindex;
- nexthop_nh->nh_weight = rtnh->rtnh_hops + 1;
+ fib_cfg.fc_flags = (cfg->fc_flags & ~0xFF) | rtnh->rtnh_flags;
+ fib_cfg.fc_oif = rtnh->rtnh_ifindex;
attrlen = rtnh_attrlen(rtnh);
if (attrlen > 0) {
struct nlattr *nla, *attrs = rtnh_attrs(rtnh);
nla = nla_find(attrs, attrlen, RTA_GATEWAY);
- nexthop_nh->nh_gw = nla ? nla_get_in_addr(nla) : 0;
-#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (nla)
+ fib_cfg.fc_gw = nla_get_in_addr(nla);
+
nla = nla_find(attrs, attrlen, RTA_FLOW);
- nexthop_nh->nh_tclassid = nla ? nla_get_u32(nla) : 0;
- if (nexthop_nh->nh_tclassid)
- fi->fib_net->ipv4.fib_num_tclassid_users++;
-#endif
- nla = nla_find(attrs, attrlen, RTA_ENCAP);
- if (nla) {
- struct lwtunnel_state *lwtstate;
- struct nlattr *nla_entype;
-
- nla_entype = nla_find(attrs, attrlen,
- RTA_ENCAP_TYPE);
- if (!nla_entype) {
- NL_SET_BAD_ATTR(extack, nla);
- NL_SET_ERR_MSG(extack,
- "Encap type is missing");
- goto err_inval;
- }
+ if (nla)
+ fib_cfg.fc_flow = nla_get_u32(nla);
- ret = lwtunnel_build_state(nla_get_u16(
- nla_entype),
- nla, AF_INET, cfg,
- &lwtstate, extack);
- if (ret)
- goto errout;
- nexthop_nh->nh_lwtstate =
- lwtstate_get(lwtstate);
- }
+ fib_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP);
+ nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE);
+ if (nla)
+ fib_cfg.fc_encap_type = nla_get_u16(nla);
}
+ ret = fib_nh_init(net, nexthop_nh, &fib_cfg,
+ rtnh->rtnh_hops + 1, extack);
+ if (ret)
+ goto errout;
+
rtnh = rtnh_next(rtnh, &remaining);
} endfor_nexthops(fi);
- return 0;
-
-err_inval:
ret = -EINVAL;
-
+ if (cfg->fc_oif && fi->fib_nh->fib_nh_oif != cfg->fc_oif) {
+ NL_SET_ERR_MSG(extack,
+ "Nexthop device index does not match RTA_OIF");
+ goto errout;
+ }
+ if (cfg->fc_gw && fi->fib_nh->fib_nh_gw4 != cfg->fc_gw) {
+ NL_SET_ERR_MSG(extack,
+ "Nexthop gateway does not match RTA_GATEWAY");
+ goto errout;
+ }
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (cfg->fc_flow && fi->fib_nh->nh_tclassid != cfg->fc_flow) {
+ NL_SET_ERR_MSG(extack,
+ "Nexthop class id does not match RTA_FLOW");
+ goto errout;
+ }
+#endif
+ ret = 0;
errout:
return ret;
}
@@ -558,49 +637,51 @@ static void fib_rebalance(struct fib_info *fi)
{
int total;
int w;
- struct in_device *in_dev;
if (fi->fib_nhs < 2)
return;
total = 0;
for_nexthops(fi) {
- if (nh->nh_flags & RTNH_F_DEAD)
+ if (nh->fib_nh_flags & RTNH_F_DEAD)
continue;
- in_dev = __in_dev_get_rtnl(nh->nh_dev);
-
- if (in_dev &&
- IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
- nh->nh_flags & RTNH_F_LINKDOWN)
+ if (ip_ignore_linkdown(nh->fib_nh_dev) &&
+ nh->fib_nh_flags & RTNH_F_LINKDOWN)
continue;
- total += nh->nh_weight;
+ total += nh->fib_nh_weight;
} endfor_nexthops(fi);
w = 0;
change_nexthops(fi) {
int upper_bound;
- in_dev = __in_dev_get_rtnl(nexthop_nh->nh_dev);
-
- if (nexthop_nh->nh_flags & RTNH_F_DEAD) {
+ if (nexthop_nh->fib_nh_flags & RTNH_F_DEAD) {
upper_bound = -1;
- } else if (in_dev &&
- IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
- nexthop_nh->nh_flags & RTNH_F_LINKDOWN) {
+ } else if (ip_ignore_linkdown(nexthop_nh->fib_nh_dev) &&
+ nexthop_nh->fib_nh_flags & RTNH_F_LINKDOWN) {
upper_bound = -1;
} else {
- w += nexthop_nh->nh_weight;
+ w += nexthop_nh->fib_nh_weight;
upper_bound = DIV_ROUND_CLOSEST_ULL((u64)w << 31,
total) - 1;
}
- atomic_set(&nexthop_nh->nh_upper_bound, upper_bound);
+ atomic_set(&nexthop_nh->fib_nh_upper_bound, upper_bound);
} endfor_nexthops(fi);
}
#else /* CONFIG_IP_ROUTE_MULTIPATH */
+static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
+ int remaining, struct fib_config *cfg,
+ struct netlink_ext_ack *extack)
+{
+ NL_SET_ERR_MSG(extack, "Multipath support not enabled in kernel");
+
+ return -EINVAL;
+}
+
#define fib_rebalance(fi) do { } while (0)
#endif /* CONFIG_IP_ROUTE_MULTIPATH */
@@ -620,7 +701,7 @@ static int fib_encap_match(u16 encap_type,
ret = lwtunnel_build_state(encap_type, encap, AF_INET,
cfg, &lwtstate, extack);
if (!ret) {
- result = lwtunnel_cmp_encap(lwtstate, nh->nh_lwtstate);
+ result = lwtunnel_cmp_encap(lwtstate, nh->fib_nh_lws);
lwtstate_free(lwtstate);
}
@@ -649,8 +730,8 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
cfg->fc_flow != fi->fib_nh->nh_tclassid)
return 1;
#endif
- if ((!cfg->fc_oif || cfg->fc_oif == fi->fib_nh->nh_oif) &&
- (!cfg->fc_gw || cfg->fc_gw == fi->fib_nh->nh_gw))
+ if ((!cfg->fc_oif || cfg->fc_oif == fi->fib_nh->fib_nh_oif) &&
+ (!cfg->fc_gw || cfg->fc_gw == fi->fib_nh->fib_nh_gw4))
return 0;
return 1;
}
@@ -668,7 +749,7 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
if (!rtnh_ok(rtnh, remaining))
return -EINVAL;
- if (rtnh->rtnh_ifindex && rtnh->rtnh_ifindex != nh->nh_oif)
+ if (rtnh->rtnh_ifindex && rtnh->rtnh_ifindex != nh->fib_nh_oif)
return 1;
attrlen = rtnh_attrlen(rtnh);
@@ -676,7 +757,7 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
struct nlattr *nla, *attrs = rtnh_attrs(rtnh);
nla = nla_find(attrs, attrlen, RTA_GATEWAY);
- if (nla && nla_get_in_addr(nla) != nh->nh_gw)
+ if (nla && nla_get_in_addr(nla) != nh->fib_nh_gw4)
return 1;
#ifdef CONFIG_IP_ROUTE_CLASSID
nla = nla_find(attrs, attrlen, RTA_FLOW);
@@ -783,10 +864,10 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
struct net_device *dev;
net = cfg->fc_nlinfo.nl_net;
- if (nh->nh_gw) {
+ if (nh->fib_nh_gw4) {
struct fib_result res;
- if (nh->nh_flags & RTNH_F_ONLINK) {
+ if (nh->fib_nh_flags & RTNH_F_ONLINK) {
unsigned int addr_type;
if (cfg->fc_scope >= RT_SCOPE_LINK) {
@@ -794,7 +875,7 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
"Nexthop has invalid scope");
return -EINVAL;
}
- dev = __dev_get_by_index(net, nh->nh_oif);
+ dev = __dev_get_by_index(net, nh->fib_nh_oif);
if (!dev) {
NL_SET_ERR_MSG(extack, "Nexthop device required for onlink");
return -ENODEV;
@@ -804,26 +885,27 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
"Nexthop device is not up");
return -ENETDOWN;
}
- addr_type = inet_addr_type_dev_table(net, dev, nh->nh_gw);
+ addr_type = inet_addr_type_dev_table(net, dev,
+ nh->fib_nh_gw4);
if (addr_type != RTN_UNICAST) {
NL_SET_ERR_MSG(extack,
"Nexthop has invalid gateway");
return -EINVAL;
}
if (!netif_carrier_ok(dev))
- nh->nh_flags |= RTNH_F_LINKDOWN;
- nh->nh_dev = dev;
+ nh->fib_nh_flags |= RTNH_F_LINKDOWN;
+ nh->fib_nh_dev = dev;
dev_hold(dev);
- nh->nh_scope = RT_SCOPE_LINK;
+ nh->fib_nh_scope = RT_SCOPE_LINK;
return 0;
}
rcu_read_lock();
{
struct fib_table *tbl = NULL;
struct flowi4 fl4 = {
- .daddr = nh->nh_gw,
+ .daddr = nh->fib_nh_gw4,
.flowi4_scope = cfg->fc_scope + 1,
- .flowi4_oif = nh->nh_oif,
+ .flowi4_oif = nh->fib_nh_oif,
.flowi4_iif = LOOPBACK_IFINDEX,
};
@@ -860,9 +942,9 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
NL_SET_ERR_MSG(extack, "Nexthop has invalid gateway");
goto out;
}
- nh->nh_scope = res.scope;
- nh->nh_oif = FIB_RES_OIF(res);
- nh->nh_dev = dev = FIB_RES_DEV(res);
+ nh->fib_nh_scope = res.scope;
+ nh->fib_nh_oif = FIB_RES_OIF(res);
+ nh->fib_nh_dev = dev = FIB_RES_DEV(res);
if (!dev) {
NL_SET_ERR_MSG(extack,
"No egress device for nexthop gateway");
@@ -870,19 +952,19 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
}
dev_hold(dev);
if (!netif_carrier_ok(dev))
- nh->nh_flags |= RTNH_F_LINKDOWN;
+ nh->fib_nh_flags |= RTNH_F_LINKDOWN;
err = (dev->flags & IFF_UP) ? 0 : -ENETDOWN;
} else {
struct in_device *in_dev;
- if (nh->nh_flags & (RTNH_F_PERVASIVE | RTNH_F_ONLINK)) {
+ if (nh->fib_nh_flags & (RTNH_F_PERVASIVE | RTNH_F_ONLINK)) {
NL_SET_ERR_MSG(extack,
"Invalid flags for nexthop - PERVASIVE and ONLINK can not be set");
return -EINVAL;
}
rcu_read_lock();
err = -ENODEV;
- in_dev = inetdev_by_index(net, nh->nh_oif);
+ in_dev = inetdev_by_index(net, nh->fib_nh_oif);
if (!in_dev)
goto out;
err = -ENETDOWN;
@@ -890,11 +972,11 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_nh *nh,
NL_SET_ERR_MSG(extack, "Device for nexthop is not up");
goto out;
}
- nh->nh_dev = in_dev->dev;
- dev_hold(nh->nh_dev);
- nh->nh_scope = RT_SCOPE_HOST;
- if (!netif_carrier_ok(nh->nh_dev))
- nh->nh_flags |= RTNH_F_LINKDOWN;
+ nh->fib_nh_dev = in_dev->dev;
+ dev_hold(nh->fib_nh_dev);
+ nh->fib_nh_scope = RT_SCOPE_HOST;
+ if (!netif_carrier_ok(nh->fib_nh_dev))
+ nh->fib_nh_flags |= RTNH_F_LINKDOWN;
err = 0;
}
out:
@@ -986,14 +1068,29 @@ static void fib_info_hash_move(struct hlist_head *new_info_hash,
__be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh)
{
- nh->nh_saddr = inet_select_addr(nh->nh_dev,
- nh->nh_gw,
+ nh->nh_saddr = inet_select_addr(nh->fib_nh_dev,
+ nh->fib_nh_gw4,
nh->nh_parent->fib_scope);
nh->nh_saddr_genid = atomic_read(&net->ipv4.dev_addr_genid);
return nh->nh_saddr;
}
+__be32 fib_result_prefsrc(struct net *net, struct fib_result *res)
+{
+ struct fib_nh_common *nhc = res->nhc;
+ struct fib_nh *nh;
+
+ if (res->fi->fib_prefsrc)
+ return res->fi->fib_prefsrc;
+
+ nh = container_of(nhc, struct fib_nh, nh_common);
+ if (nh->nh_saddr_genid == atomic_read(&net->ipv4.dev_addr_genid))
+ return nh->nh_saddr;
+
+ return fib_info_update_nh_saddr(net, nh);
+}
+
static bool fib_valid_prefsrc(struct fib_config *cfg, __be32 fib_prefsrc)
{
if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
@@ -1096,69 +1193,15 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
fi->fib_nhs = nhs;
change_nexthops(fi) {
nexthop_nh->nh_parent = fi;
- nexthop_nh->nh_pcpu_rth_output = alloc_percpu(struct rtable __rcu *);
- if (!nexthop_nh->nh_pcpu_rth_output)
- goto failure;
} endfor_nexthops(fi)
- if (cfg->fc_mp) {
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
+ if (cfg->fc_mp)
err = fib_get_nhs(fi, cfg->fc_mp, cfg->fc_mp_len, cfg, extack);
- if (err != 0)
- goto failure;
- if (cfg->fc_oif && fi->fib_nh->nh_oif != cfg->fc_oif) {
- NL_SET_ERR_MSG(extack,
- "Nexthop device index does not match RTA_OIF");
- goto err_inval;
- }
- if (cfg->fc_gw && fi->fib_nh->nh_gw != cfg->fc_gw) {
- NL_SET_ERR_MSG(extack,
- "Nexthop gateway does not match RTA_GATEWAY");
- goto err_inval;
- }
-#ifdef CONFIG_IP_ROUTE_CLASSID
- if (cfg->fc_flow && fi->fib_nh->nh_tclassid != cfg->fc_flow) {
- NL_SET_ERR_MSG(extack,
- "Nexthop class id does not match RTA_FLOW");
- goto err_inval;
- }
-#endif
-#else
- NL_SET_ERR_MSG(extack,
- "Multipath support not enabled in kernel");
- goto err_inval;
-#endif
- } else {
- struct fib_nh *nh = fi->fib_nh;
-
- if (cfg->fc_encap) {
- struct lwtunnel_state *lwtstate;
-
- if (cfg->fc_encap_type == LWTUNNEL_ENCAP_NONE) {
- NL_SET_ERR_MSG(extack,
- "LWT encap type not specified");
- goto err_inval;
- }
- err = lwtunnel_build_state(cfg->fc_encap_type,
- cfg->fc_encap, AF_INET, cfg,
- &lwtstate, extack);
- if (err)
- goto failure;
+ else
+ err = fib_nh_init(net, fi->fib_nh, cfg, 1, extack);
- nh->nh_lwtstate = lwtstate_get(lwtstate);
- }
- nh->nh_oif = cfg->fc_oif;
- nh->nh_gw = cfg->fc_gw;
- nh->nh_flags = cfg->fc_flags;
-#ifdef CONFIG_IP_ROUTE_CLASSID
- nh->nh_tclassid = cfg->fc_flow;
- if (nh->nh_tclassid)
- fi->fib_net->ipv4.fib_num_tclassid_users++;
-#endif
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
- nh->nh_weight = 1;
-#endif
- }
+ if (err != 0)
+ goto failure;
if (fib_props[cfg->fc_type].error) {
if (cfg->fc_gw || cfg->fc_oif || cfg->fc_mp) {
@@ -1195,15 +1238,15 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
"Route with host scope can not have multiple nexthops");
goto err_inval;
}
- if (nh->nh_gw) {
+ if (nh->fib_nh_gw4) {
NL_SET_ERR_MSG(extack,
"Route with host scope can not have a gateway");
goto err_inval;
}
- nh->nh_scope = RT_SCOPE_NOWHERE;
- nh->nh_dev = dev_get_by_index(net, fi->fib_nh->nh_oif);
+ nh->fib_nh_scope = RT_SCOPE_NOWHERE;
+ nh->fib_nh_dev = dev_get_by_index(net, fi->fib_nh->fib_nh_oif);
err = -ENODEV;
- if (!nh->nh_dev)
+ if (!nh->fib_nh_dev)
goto failure;
} else {
int linkdown = 0;
@@ -1212,7 +1255,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
err = fib_check_nh(cfg, nexthop_nh, extack);
if (err != 0)
goto failure;
- if (nexthop_nh->nh_flags & RTNH_F_LINKDOWN)
+ if (nexthop_nh->fib_nh_flags & RTNH_F_LINKDOWN)
linkdown++;
} endfor_nexthops(fi)
if (linkdown == fi->fib_nhs)
@@ -1254,9 +1297,9 @@ link_it:
struct hlist_head *head;
unsigned int hash;
- if (!nexthop_nh->nh_dev)
+ if (!nexthop_nh->fib_nh_dev)
continue;
- hash = fib_devindex_hashfn(nexthop_nh->nh_dev->ifindex);
+ hash = fib_devindex_hashfn(nexthop_nh->fib_nh_dev->ifindex);
head = &fib_info_devhash[hash];
hlist_add_head(&nexthop_nh->nh_hash, head);
} endfor_nexthops(fi)
@@ -1275,6 +1318,126 @@ failure:
return ERR_PTR(err);
}
+int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc,
+ unsigned int *flags, bool skip_oif)
+{
+ if (nhc->nhc_flags & RTNH_F_DEAD)
+ *flags |= RTNH_F_DEAD;
+
+ if (nhc->nhc_flags & RTNH_F_LINKDOWN) {
+ *flags |= RTNH_F_LINKDOWN;
+
+ rcu_read_lock();
+ switch (nhc->nhc_family) {
+ case AF_INET:
+ if (ip_ignore_linkdown(nhc->nhc_dev))
+ *flags |= RTNH_F_DEAD;
+ break;
+ case AF_INET6:
+ if (ip6_ignore_linkdown(nhc->nhc_dev))
+ *flags |= RTNH_F_DEAD;
+ break;
+ }
+ rcu_read_unlock();
+ }
+
+ if (nhc->nhc_has_gw) {
+ switch (nhc->nhc_family) {
+ case AF_INET:
+ if (nla_put_in_addr(skb, RTA_GATEWAY, nhc->nhc_gw.ipv4))
+ goto nla_put_failure;
+ break;
+ case AF_INET6:
+ if (nla_put_in6_addr(skb, RTA_GATEWAY,
+ &nhc->nhc_gw.ipv6) < 0)
+ goto nla_put_failure;
+ break;
+ }
+ }
+
+ *flags |= (nhc->nhc_flags & RTNH_F_ONLINK);
+ if (nhc->nhc_flags & RTNH_F_OFFLOAD)
+ *flags |= RTNH_F_OFFLOAD;
+
+ if (!skip_oif && nhc->nhc_dev &&
+ nla_put_u32(skb, RTA_OIF, nhc->nhc_dev->ifindex))
+ goto nla_put_failure;
+
+ if (nhc->nhc_lwtstate &&
+ lwtunnel_fill_encap(skb, nhc->nhc_lwtstate) < 0)
+ goto nla_put_failure;
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(fib_nexthop_info);
+
+#if IS_ENABLED(CONFIG_IP_ROUTE_MULTIPATH) || IS_ENABLED(CONFIG_IPV6)
+int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc,
+ int nh_weight)
+{
+ const struct net_device *dev = nhc->nhc_dev;
+ struct rtnexthop *rtnh;
+ unsigned int flags = 0;
+
+ rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh));
+ if (!rtnh)
+ goto nla_put_failure;
+
+ rtnh->rtnh_hops = nh_weight - 1;
+ rtnh->rtnh_ifindex = dev ? dev->ifindex : 0;
+
+ if (fib_nexthop_info(skb, nhc, &flags, true) < 0)
+ goto nla_put_failure;
+
+ rtnh->rtnh_flags = flags;
+
+ /* length of rtnetlink header + attributes */
+ rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *)rtnh;
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(fib_add_nexthop);
+#endif
+
+#ifdef CONFIG_IP_ROUTE_MULTIPATH
+static int fib_add_multipath(struct sk_buff *skb, struct fib_info *fi)
+{
+ struct nlattr *mp;
+
+ mp = nla_nest_start(skb, RTA_MULTIPATH);
+ if (!mp)
+ goto nla_put_failure;
+
+ for_nexthops(fi) {
+ if (fib_add_nexthop(skb, &nh->nh_common, nh->fib_nh_weight) < 0)
+ goto nla_put_failure;
+#ifdef CONFIG_IP_ROUTE_CLASSID
+ if (nh->nh_tclassid &&
+ nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))
+ goto nla_put_failure;
+#endif
+ } endfor_nexthops(fi);
+
+ nla_nest_end(skb, mp);
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+#else
+static int fib_add_multipath(struct sk_buff *skb, struct fib_info *fi)
+{
+ return 0;
+}
+#endif
+
int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
u32 tb_id, u8 type, __be32 dst, int dst_len, u8 tos,
struct fib_info *fi, unsigned int flags)
@@ -1315,80 +1478,23 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
nla_put_in_addr(skb, RTA_PREFSRC, fi->fib_prefsrc))
goto nla_put_failure;
if (fi->fib_nhs == 1) {
- if (fi->fib_nh->nh_gw &&
- nla_put_in_addr(skb, RTA_GATEWAY, fi->fib_nh->nh_gw))
- goto nla_put_failure;
- if (fi->fib_nh->nh_oif &&
- nla_put_u32(skb, RTA_OIF, fi->fib_nh->nh_oif))
+ struct fib_nh *nh = &fi->fib_nh[0];
+ unsigned int flags = 0;
+
+ if (fib_nexthop_info(skb, &nh->nh_common, &flags, false) < 0)
goto nla_put_failure;
- if (fi->fib_nh->nh_flags & RTNH_F_LINKDOWN) {
- struct in_device *in_dev;
-
- rcu_read_lock();
- in_dev = __in_dev_get_rcu(fi->fib_nh->nh_dev);
- if (in_dev &&
- IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
- rtm->rtm_flags |= RTNH_F_DEAD;
- rcu_read_unlock();
- }
- if (fi->fib_nh->nh_flags & RTNH_F_OFFLOAD)
- rtm->rtm_flags |= RTNH_F_OFFLOAD;
+
+ rtm->rtm_flags = flags;
#ifdef CONFIG_IP_ROUTE_CLASSID
- if (fi->fib_nh[0].nh_tclassid &&
- nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid))
+ if (nh->nh_tclassid &&
+ nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))
goto nla_put_failure;
#endif
- if (fi->fib_nh->nh_lwtstate &&
- lwtunnel_fill_encap(skb, fi->fib_nh->nh_lwtstate) < 0)
+ } else {
+ if (fib_add_multipath(skb, fi) < 0)
goto nla_put_failure;
}
-#ifdef CONFIG_IP_ROUTE_MULTIPATH
- if (fi->fib_nhs > 1) {
- struct rtnexthop *rtnh;
- struct nlattr *mp;
-
- mp = nla_nest_start(skb, RTA_MULTIPATH);
- if (!mp)
- goto nla_put_failure;
-
- for_nexthops(fi) {
- rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh));
- if (!rtnh)
- goto nla_put_failure;
-
- rtnh->rtnh_flags = nh->nh_flags & 0xFF;
- if (nh->nh_flags & RTNH_F_LINKDOWN) {
- struct in_device *in_dev;
-
- rcu_read_lock();
- in_dev = __in_dev_get_rcu(nh->nh_dev);
- if (in_dev &&
- IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
- rtnh->rtnh_flags |= RTNH_F_DEAD;
- rcu_read_unlock();
- }
- rtnh->rtnh_hops = nh->nh_weight - 1;
- rtnh->rtnh_ifindex = nh->nh_oif;
-
- if (nh->nh_gw &&
- nla_put_in_addr(skb, RTA_GATEWAY, nh->nh_gw))
- goto nla_put_failure;
-#ifdef CONFIG_IP_ROUTE_CLASSID
- if (nh->nh_tclassid &&
- nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))
- goto nla_put_failure;
-#endif
- if (nh->nh_lwtstate &&
- lwtunnel_fill_encap(skb, nh->nh_lwtstate) < 0)
- goto nla_put_failure;
- /* length of rtnetlink header + attributes */
- rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh;
- } endfor_nexthops(fi);
-
- nla_nest_end(skb, mp);
- }
-#endif
nlmsg_end(skb, nlh);
return 0;
@@ -1427,28 +1533,26 @@ int fib_sync_down_addr(struct net_device *dev, __be32 local)
return ret;
}
-static int call_fib_nh_notifiers(struct fib_nh *fib_nh,
+static int call_fib_nh_notifiers(struct fib_nh *nh,
enum fib_event_type event_type)
{
- struct in_device *in_dev = __in_dev_get_rtnl(fib_nh->nh_dev);
+ bool ignore_link_down = ip_ignore_linkdown(nh->fib_nh_dev);
struct fib_nh_notifier_info info = {
- .fib_nh = fib_nh,
+ .fib_nh = nh,
};
switch (event_type) {
case FIB_EVENT_NH_ADD:
- if (fib_nh->nh_flags & RTNH_F_DEAD)
+ if (nh->fib_nh_flags & RTNH_F_DEAD)
break;
- if (IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
- fib_nh->nh_flags & RTNH_F_LINKDOWN)
+ if (ignore_link_down && nh->fib_nh_flags & RTNH_F_LINKDOWN)
break;
- return call_fib4_notifiers(dev_net(fib_nh->nh_dev), event_type,
+ return call_fib4_notifiers(dev_net(nh->fib_nh_dev), event_type,
&info.info);
case FIB_EVENT_NH_DEL:
- if ((in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
- fib_nh->nh_flags & RTNH_F_LINKDOWN) ||
- (fib_nh->nh_flags & RTNH_F_DEAD))
- return call_fib4_notifiers(dev_net(fib_nh->nh_dev),
+ if ((ignore_link_down && nh->fib_nh_flags & RTNH_F_LINKDOWN) ||
+ (nh->fib_nh_flags & RTNH_F_DEAD))
+ return call_fib4_notifiers(dev_net(nh->fib_nh_dev),
event_type, &info.info);
default:
break;
@@ -1502,7 +1606,7 @@ void fib_sync_mtu(struct net_device *dev, u32 orig_mtu)
struct fib_nh *nh;
hlist_for_each_entry(nh, head, nh_hash) {
- if (nh->nh_dev == dev)
+ if (nh->fib_nh_dev == dev)
nh_update_mtu(nh, dev->mtu, orig_mtu);
}
}
@@ -1530,22 +1634,22 @@ int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force)
int dead;
BUG_ON(!fi->fib_nhs);
- if (nh->nh_dev != dev || fi == prev_fi)
+ if (nh->fib_nh_dev != dev || fi == prev_fi)
continue;
prev_fi = fi;
dead = 0;
change_nexthops(fi) {
- if (nexthop_nh->nh_flags & RTNH_F_DEAD)
+ if (nexthop_nh->fib_nh_flags & RTNH_F_DEAD)
dead++;
- else if (nexthop_nh->nh_dev == dev &&
- nexthop_nh->nh_scope != scope) {
+ else if (nexthop_nh->fib_nh_dev == dev &&
+ nexthop_nh->fib_nh_scope != scope) {
switch (event) {
case NETDEV_DOWN:
case NETDEV_UNREGISTER:
- nexthop_nh->nh_flags |= RTNH_F_DEAD;
+ nexthop_nh->fib_nh_flags |= RTNH_F_DEAD;
/* fall through */
case NETDEV_CHANGE:
- nexthop_nh->nh_flags |= RTNH_F_LINKDOWN;
+ nexthop_nh->fib_nh_flags |= RTNH_F_LINKDOWN;
break;
}
call_fib_nh_notifiers(nexthop_nh,
@@ -1554,7 +1658,7 @@ int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force)
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
if (event == NETDEV_UNREGISTER &&
- nexthop_nh->nh_dev == dev) {
+ nexthop_nh->fib_nh_dev == dev) {
dead = fi->fib_nhs;
break;
}
@@ -1614,8 +1718,8 @@ static void fib_select_default(const struct flowi4 *flp, struct fib_result *res)
if (next_fi->fib_scope != res->scope ||
fa->fa_type != RTN_UNICAST)
continue;
- if (!next_fi->fib_nh[0].nh_gw ||
- next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK)
+ if (!next_fi->fib_nh[0].fib_nh_gw4 ||
+ next_fi->fib_nh[0].fib_nh_scope != RT_SCOPE_LINK)
continue;
fib_alias_accessed(fa);
@@ -1686,24 +1790,24 @@ int fib_sync_up(struct net_device *dev, unsigned int nh_flags)
int alive;
BUG_ON(!fi->fib_nhs);
- if (nh->nh_dev != dev || fi == prev_fi)
+ if (nh->fib_nh_dev != dev || fi == prev_fi)
continue;
prev_fi = fi;
alive = 0;
change_nexthops(fi) {
- if (!(nexthop_nh->nh_flags & nh_flags)) {
+ if (!(nexthop_nh->fib_nh_flags & nh_flags)) {
alive++;
continue;
}
- if (!nexthop_nh->nh_dev ||
- !(nexthop_nh->nh_dev->flags & IFF_UP))
+ if (!nexthop_nh->fib_nh_dev ||
+ !(nexthop_nh->fib_nh_dev->flags & IFF_UP))
continue;
- if (nexthop_nh->nh_dev != dev ||
+ if (nexthop_nh->fib_nh_dev != dev ||
!__in_dev_get_rtnl(dev))
continue;
alive++;
- nexthop_nh->nh_flags &= ~nh_flags;
+ nexthop_nh->fib_nh_flags &= ~nh_flags;
call_fib_nh_notifiers(nexthop_nh, FIB_EVENT_NH_ADD);
} endfor_nexthops(fi)
@@ -1723,13 +1827,13 @@ static bool fib_good_nh(const struct fib_nh *nh)
{
int state = NUD_REACHABLE;
- if (nh->nh_scope == RT_SCOPE_LINK) {
+ if (nh->fib_nh_scope == RT_SCOPE_LINK) {
struct neighbour *n;
rcu_read_lock_bh();
- n = __ipv4_neigh_lookup_noref(nh->nh_dev,
- (__force u32)nh->nh_gw);
+ n = __ipv4_neigh_lookup_noref(nh->fib_nh_dev,
+ (__force u32)nh->fib_nh_gw4);
if (n)
state = n->nud_state;
@@ -1745,20 +1849,22 @@ void fib_select_multipath(struct fib_result *res, int hash)
struct net *net = fi->fib_net;
bool first = false;
- for_nexthops(fi) {
+ change_nexthops(fi) {
if (net->ipv4.sysctl_fib_multipath_use_neigh) {
- if (!fib_good_nh(nh))
+ if (!fib_good_nh(nexthop_nh))
continue;
if (!first) {
res->nh_sel = nhsel;
+ res->nhc = &nexthop_nh->nh_common;
first = true;
}
}
- if (hash > atomic_read(&nh->nh_upper_bound))
+ if (hash > atomic_read(&nexthop_nh->fib_nh_upper_bound))
continue;
res->nh_sel = nhsel;
+ res->nhc = &nexthop_nh->nh_common;
return;
} endfor_nexthops(fi);
}
@@ -1785,5 +1891,5 @@ void fib_select_path(struct net *net, struct fib_result *res,
check_saddr:
if (!fl4->saddr)
- fl4->saddr = FIB_RES_PREFSRC(net, *res);
+ fl4->saddr = fib_result_prefsrc(net, res);
}
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index a573e37e0615..334f723bdf80 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -183,14 +183,16 @@ struct trie {
};
static struct key_vector *resize(struct trie *t, struct key_vector *tn);
-static size_t tnode_free_size;
+static unsigned int tnode_free_size;
/*
- * synchronize_rcu after call_rcu for that many pages; it should be especially
- * useful before resizing the root node with PREEMPT_NONE configs; the value was
- * obtained experimentally, aiming to avoid visible slowdown.
+ * synchronize_rcu after call_rcu for outstanding dirty memory; it should be
+ * especially useful before resizing the root node with PREEMPT_NONE configs;
+ * the value was obtained experimentally, aiming to avoid visible slowdown.
*/
-static const int sync_pages = 128;
+unsigned int sysctl_fib_sync_mem = 512 * 1024;
+unsigned int sysctl_fib_sync_mem_min = 64 * 1024;
+unsigned int sysctl_fib_sync_mem_max = 64 * 1024 * 1024;
static struct kmem_cache *fn_alias_kmem __ro_after_init;
static struct kmem_cache *trie_leaf_kmem __ro_after_init;
@@ -504,7 +506,7 @@ static void tnode_free(struct key_vector *tn)
tn = container_of(head, struct tnode, rcu)->kv;
}
- if (tnode_free_size >= PAGE_SIZE * sync_pages) {
+ if (tnode_free_size >= sysctl_fib_sync_mem) {
tnode_free_size = 0;
synchronize_rcu();
}
@@ -1468,19 +1470,17 @@ found:
if (fi->fib_flags & RTNH_F_DEAD)
continue;
for (nhsel = 0; nhsel < fi->fib_nhs; nhsel++) {
- const struct fib_nh *nh = &fi->fib_nh[nhsel];
- struct in_device *in_dev = __in_dev_get_rcu(nh->nh_dev);
+ struct fib_nh_common *nhc = fib_info_nhc(fi, nhsel);
- if (nh->nh_flags & RTNH_F_DEAD)
+ if (nhc->nhc_flags & RTNH_F_DEAD)
continue;
- if (in_dev &&
- IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
- nh->nh_flags & RTNH_F_LINKDOWN &&
+ if (ip_ignore_linkdown(nhc->nhc_dev) &&
+ nhc->nhc_flags & RTNH_F_LINKDOWN &&
!(fib_flags & FIB_LOOKUP_IGNORE_LINKSTATE))
continue;
if (!(flp->flowi4_flags & FLOWI_FLAG_SKIP_NH_OIF)) {
if (flp->flowi4_oif &&
- flp->flowi4_oif != nh->nh_oif)
+ flp->flowi4_oif != nhc->nhc_oif)
continue;
}
@@ -1490,6 +1490,7 @@ found:
res->prefix = htonl(n->key);
res->prefixlen = KEYLENGTH - fa->fa_slen;
res->nh_sel = nhsel;
+ res->nhc = nhc;
res->type = fa->fa_type;
res->scope = fi->fib_scope;
res->fi = fi;
@@ -1498,7 +1499,7 @@ found:
#ifdef CONFIG_IP_FIB_TRIE_STATS
this_cpu_inc(stats->semantic_match_passed);
#endif
- trace_fib_table_lookup(tb->tb_id, flp, nh, err);
+ trace_fib_table_lookup(tb->tb_id, flp, nhc, err);
return err;
}
@@ -2651,7 +2652,7 @@ static unsigned int fib_flag_trans(int type, __be32 mask, const struct fib_info
if (type == RTN_UNREACHABLE || type == RTN_PROHIBIT)
flags = RTF_REJECT;
- if (fi && fi->fib_nh->nh_gw)
+ if (fi && fi->fib_nh->fib_nh_gw4)
flags |= RTF_GATEWAY;
if (mask == htonl(0xFFFFFFFF))
flags |= RTF_HOST;
@@ -2702,7 +2703,7 @@ static int fib_route_seq_show(struct seq_file *seq, void *v)
"%d\t%08X\t%d\t%u\t%u",
fi->fib_dev ? fi->fib_dev->name : "*",
prefix,
- fi->fib_nh->nh_gw, flags, 0, 0,
+ fi->fib_nh->fib_nh_gw4, flags, 0, 0,
fi->fib_priority,
mask,
(fi->fib_advmss ?
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 79e98e21cdd7..100e63f57ea6 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -499,15 +499,45 @@ out_unlock:
return err;
}
-static int fou_add_to_port_list(struct net *net, struct fou *fou)
+static bool fou_cfg_cmp(struct fou *fou, struct fou_cfg *cfg)
+{
+ struct sock *sk = fou->sock->sk;
+ struct udp_port_cfg *udp_cfg = &cfg->udp_config;
+
+ if (fou->family != udp_cfg->family ||
+ fou->port != udp_cfg->local_udp_port ||
+ sk->sk_dport != udp_cfg->peer_udp_port ||
+ sk->sk_bound_dev_if != udp_cfg->bind_ifindex)
+ return false;
+
+ if (fou->family == AF_INET) {
+ if (sk->sk_rcv_saddr != udp_cfg->local_ip.s_addr ||
+ sk->sk_daddr != udp_cfg->peer_ip.s_addr)
+ return false;
+ else
+ return true;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (ipv6_addr_cmp(&sk->sk_v6_rcv_saddr, &udp_cfg->local_ip6) ||
+ ipv6_addr_cmp(&sk->sk_v6_daddr, &udp_cfg->peer_ip6))
+ return false;
+ else
+ return true;
+#endif
+ }
+
+ return false;
+}
+
+static int fou_add_to_port_list(struct net *net, struct fou *fou,
+ struct fou_cfg *cfg)
{
struct fou_net *fn = net_generic(net, fou_net_id);
struct fou *fout;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fout, &fn->fou_list, list) {
- if (fou->port == fout->port &&
- fou->family == fout->family) {
+ if (fou_cfg_cmp(fout, cfg)) {
mutex_unlock(&fn->fou_lock);
return -EALREADY;
}
@@ -585,7 +615,7 @@ static int fou_create(struct net *net, struct fou_cfg *cfg,
sk->sk_allocation = GFP_ATOMIC;
- err = fou_add_to_port_list(net, fou);
+ err = fou_add_to_port_list(net, fou, cfg);
if (err)
goto error;
@@ -605,14 +635,12 @@ error:
static int fou_destroy(struct net *net, struct fou_cfg *cfg)
{
struct fou_net *fn = net_generic(net, fou_net_id);
- __be16 port = cfg->udp_config.local_udp_port;
- u8 family = cfg->udp_config.family;
int err = -EINVAL;
struct fou *fou;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fou, &fn->fou_list, list) {
- if (fou->port == port && fou->family == family) {
+ if (fou_cfg_cmp(fou, cfg)) {
fou_release(fou);
err = 0;
break;
@@ -626,16 +654,27 @@ static int fou_destroy(struct net *net, struct fou_cfg *cfg)
static struct genl_family fou_nl_family;
static const struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = {
- [FOU_ATTR_PORT] = { .type = NLA_U16, },
- [FOU_ATTR_AF] = { .type = NLA_U8, },
- [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
- [FOU_ATTR_TYPE] = { .type = NLA_U8, },
- [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
+ [FOU_ATTR_PORT] = { .type = NLA_U16, },
+ [FOU_ATTR_AF] = { .type = NLA_U8, },
+ [FOU_ATTR_IPPROTO] = { .type = NLA_U8, },
+ [FOU_ATTR_TYPE] = { .type = NLA_U8, },
+ [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, },
+ [FOU_ATTR_LOCAL_V4] = { .type = NLA_U32, },
+ [FOU_ATTR_PEER_V4] = { .type = NLA_U32, },
+ [FOU_ATTR_LOCAL_V6] = { .type = sizeof(struct in6_addr), },
+ [FOU_ATTR_PEER_V6] = { .type = sizeof(struct in6_addr), },
+ [FOU_ATTR_PEER_PORT] = { .type = NLA_U16, },
+ [FOU_ATTR_IFINDEX] = { .type = NLA_S32, },
};
static int parse_nl_config(struct genl_info *info,
struct fou_cfg *cfg)
{
+ bool has_local = false, has_peer = false;
+ struct nlattr *attr;
+ int ifindex;
+ __be16 port;
+
memset(cfg, 0, sizeof(*cfg));
cfg->udp_config.family = AF_INET;
@@ -657,8 +696,7 @@ static int parse_nl_config(struct genl_info *info,
}
if (info->attrs[FOU_ATTR_PORT]) {
- __be16 port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
-
+ port = nla_get_be16(info->attrs[FOU_ATTR_PORT]);
cfg->udp_config.local_udp_port = port;
}
@@ -671,6 +709,52 @@ static int parse_nl_config(struct genl_info *info,
if (info->attrs[FOU_ATTR_REMCSUM_NOPARTIAL])
cfg->flags |= FOU_F_REMCSUM_NOPARTIAL;
+ if (cfg->udp_config.family == AF_INET) {
+ if (info->attrs[FOU_ATTR_LOCAL_V4]) {
+ attr = info->attrs[FOU_ATTR_LOCAL_V4];
+ cfg->udp_config.local_ip.s_addr = nla_get_in_addr(attr);
+ has_local = true;
+ }
+
+ if (info->attrs[FOU_ATTR_PEER_V4]) {
+ attr = info->attrs[FOU_ATTR_PEER_V4];
+ cfg->udp_config.peer_ip.s_addr = nla_get_in_addr(attr);
+ has_peer = true;
+ }
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (info->attrs[FOU_ATTR_LOCAL_V6]) {
+ attr = info->attrs[FOU_ATTR_LOCAL_V6];
+ cfg->udp_config.local_ip6 = nla_get_in6_addr(attr);
+ has_local = true;
+ }
+
+ if (info->attrs[FOU_ATTR_PEER_V6]) {
+ attr = info->attrs[FOU_ATTR_PEER_V6];
+ cfg->udp_config.peer_ip6 = nla_get_in6_addr(attr);
+ has_peer = true;
+ }
+#endif
+ }
+
+ if (has_peer) {
+ if (info->attrs[FOU_ATTR_PEER_PORT]) {
+ port = nla_get_be16(info->attrs[FOU_ATTR_PEER_PORT]);
+ cfg->udp_config.peer_udp_port = port;
+ } else {
+ return -EINVAL;
+ }
+ }
+
+ if (info->attrs[FOU_ATTR_IFINDEX]) {
+ if (!has_local)
+ return -EINVAL;
+
+ ifindex = nla_get_s32(info->attrs[FOU_ATTR_IFINDEX]);
+
+ cfg->udp_config.bind_ifindex = ifindex;
+ }
+
return 0;
}
@@ -702,15 +786,37 @@ static int fou_nl_cmd_rm_port(struct sk_buff *skb, struct genl_info *info)
static int fou_fill_info(struct fou *fou, struct sk_buff *msg)
{
+ struct sock *sk = fou->sock->sk;
+
if (nla_put_u8(msg, FOU_ATTR_AF, fou->sock->sk->sk_family) ||
nla_put_be16(msg, FOU_ATTR_PORT, fou->port) ||
+ nla_put_be16(msg, FOU_ATTR_PEER_PORT, sk->sk_dport) ||
nla_put_u8(msg, FOU_ATTR_IPPROTO, fou->protocol) ||
- nla_put_u8(msg, FOU_ATTR_TYPE, fou->type))
+ nla_put_u8(msg, FOU_ATTR_TYPE, fou->type) ||
+ nla_put_s32(msg, FOU_ATTR_IFINDEX, sk->sk_bound_dev_if))
return -1;
if (fou->flags & FOU_F_REMCSUM_NOPARTIAL)
if (nla_put_flag(msg, FOU_ATTR_REMCSUM_NOPARTIAL))
return -1;
+
+ if (fou->sock->sk->sk_family == AF_INET) {
+ if (nla_put_in_addr(msg, FOU_ATTR_LOCAL_V4, sk->sk_rcv_saddr))
+ return -1;
+
+ if (nla_put_in_addr(msg, FOU_ATTR_PEER_V4, sk->sk_daddr))
+ return -1;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ if (nla_put_in6_addr(msg, FOU_ATTR_LOCAL_V6,
+ &sk->sk_v6_rcv_saddr))
+ return -1;
+
+ if (nla_put_in6_addr(msg, FOU_ATTR_PEER_V6, &sk->sk_v6_daddr))
+ return -1;
+#endif
+ }
+
return 0;
}
@@ -763,7 +869,7 @@ static int fou_nl_cmd_get_port(struct sk_buff *skb, struct genl_info *info)
ret = -ESRCH;
mutex_lock(&fn->fou_lock);
list_for_each_entry(fout, &fn->fou_list, list) {
- if (port == fout->port && family == fout->family) {
+ if (fou_cfg_cmp(fout, &cfg)) {
ret = fou_dump_info(fout, info->snd_portid,
info->snd_seq, 0, msg,
info->genlhdr->cmd);
@@ -808,20 +914,17 @@ static const struct genl_ops fou_nl_ops[] = {
{
.cmd = FOU_CMD_ADD,
.doit = fou_nl_cmd_add_port,
- .policy = fou_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = FOU_CMD_DEL,
.doit = fou_nl_cmd_rm_port,
- .policy = fou_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = FOU_CMD_GET,
.doit = fou_nl_cmd_get_port,
.dumpit = fou_nl_dump,
- .policy = fou_nl_policy,
},
};
@@ -830,6 +933,7 @@ static struct genl_family fou_nl_family __ro_after_init = {
.name = FOU_GENL_NAME,
.version = FOU_GENL_VERSION,
.maxattr = FOU_ATTR_MAX,
+ .policy = fou_nl_policy,
.netnsok = true,
.module = THIS_MODULE,
.ops = fou_nl_ops,
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index c80188875f39..10b35328cfbc 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -693,11 +693,8 @@ int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
return 0;
}
- while (frag) {
- skb = frag->next;
- kfree_skb(frag);
- frag = skb;
- }
+ kfree_skb_list(frag);
+
IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
return err;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a5da63e5faa2..f3f2adf630d4 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -500,15 +500,17 @@ EXPORT_SYMBOL(ip_idents_reserve);
void __ip_select_ident(struct net *net, struct iphdr *iph, int segs)
{
- static u32 ip_idents_hashrnd __read_mostly;
u32 hash, id;
- net_get_random_once(&ip_idents_hashrnd, sizeof(ip_idents_hashrnd));
+ /* Note the following code is not safe, but this is okay. */
+ if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key)))
+ get_random_bytes(&net->ipv4.ip_id_key,
+ sizeof(net->ipv4.ip_id_key));
- hash = jhash_3words((__force u32)iph->daddr,
+ hash = siphash_3u32((__force u32)iph->daddr,
(__force u32)iph->saddr,
- iph->protocol ^ net_hash_mix(net),
- ip_idents_hashrnd);
+ iph->protocol,
+ &net->ipv4.ip_id_key);
id = ip_idents_reserve(hash, segs);
iph->id = htons(id);
}
@@ -642,7 +644,7 @@ static void update_or_create_fnhe(struct fib_nh *nh, __be32 daddr, __be32 gw,
unsigned int i;
int depth;
- genid = fnhe_genid(dev_net(nh->nh_dev));
+ genid = fnhe_genid(dev_net(nh->fib_nh_dev));
hval = fnhe_hashfun(daddr);
spin_lock_bh(&fnhe_lock);
@@ -776,8 +778,10 @@ static void __ip_do_redirect(struct rtable *rt, struct sk_buff *skb, struct flow
neigh_event_send(n, NULL);
} else {
if (fib_lookup(net, fl4, &res, 0) == 0) {
- struct fib_nh *nh = &FIB_RES_NH(res);
+ struct fib_nh_common *nhc = FIB_RES_NHC(res);
+ struct fib_nh *nh;
+ nh = container_of(nhc, struct fib_nh, nh_common);
update_or_create_fnhe(nh, fl4->daddr, new_gw,
0, false,
jiffies + ip_rt_gc_timeout);
@@ -1025,8 +1029,10 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu)
rcu_read_lock();
if (fib_lookup(dev_net(dst->dev), fl4, &res, 0) == 0) {
- struct fib_nh *nh = &FIB_RES_NH(res);
+ struct fib_nh_common *nhc = FIB_RES_NHC(res);
+ struct fib_nh *nh;
+ nh = container_of(nhc, struct fib_nh, nh_common);
update_or_create_fnhe(nh, fl4->daddr, 0, mtu, lock,
jiffies + ip_rt_mtu_expires);
}
@@ -1176,7 +1182,7 @@ static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie)
*
* When a PMTU/redirect information update invalidates a route,
* this is indicated by setting obsolete to DST_OBSOLETE_KILL or
- * DST_OBSOLETE_DEAD by dst_free().
+ * DST_OBSOLETE_DEAD.
*/
if (dst->obsolete != DST_OBSOLETE_FORCE_CHK || rt_is_expired(rt))
return NULL;
@@ -1233,7 +1239,7 @@ void ip_rt_get_source(u8 *addr, struct sk_buff *skb, struct rtable *rt)
rcu_read_lock();
if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res, 0) == 0)
- src = FIB_RES_PREFSRC(dev_net(rt->dst.dev), res);
+ src = fib_result_prefsrc(dev_net(rt->dst.dev), &res);
else
src = inet_select_addr(rt->dst.dev,
rt_nexthop(rt, iph->daddr),
@@ -1352,9 +1358,9 @@ static struct fib_nh_exception *find_exception(struct fib_nh *nh, __be32 daddr)
u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr)
{
+ struct fib_nh_common *nhc = res->nhc;
+ struct net_device *dev = nhc->nhc_dev;
struct fib_info *fi = res->fi;
- struct fib_nh *nh = &fi->fib_nh[res->nh_sel];
- struct net_device *dev = nh->nh_dev;
u32 mtu = 0;
if (dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu ||
@@ -1362,6 +1368,7 @@ u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr)
mtu = fi->fib_mtu;
if (likely(!mtu)) {
+ struct fib_nh *nh = container_of(nhc, struct fib_nh, nh_common);
struct fib_nh_exception *fnhe;
fnhe = find_exception(nh, daddr);
@@ -1372,7 +1379,7 @@ u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr)
if (likely(!mtu))
mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU);
- return mtu - lwtunnel_headroom(nh->nh_lwtstate, mtu);
+ return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu);
}
static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe,
@@ -1527,10 +1534,11 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr,
bool cached = false;
if (fi) {
- struct fib_nh *nh = &FIB_RES_NH(*res);
+ struct fib_nh_common *nhc = FIB_RES_NHC(*res);
+ struct fib_nh *nh = container_of(nhc, struct fib_nh, nh_common);
- if (nh->nh_gw && nh->nh_scope == RT_SCOPE_LINK) {
- rt->rt_gateway = nh->nh_gw;
+ if (nh->fib_nh_gw4 && nh->fib_nh_scope == RT_SCOPE_LINK) {
+ rt->rt_gateway = nh->fib_nh_gw4;
rt->rt_uses_gateway = 1;
}
ip_dst_init_metrics(&rt->dst, fi->fib_metrics);
@@ -1538,7 +1546,7 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr,
#ifdef CONFIG_IP_ROUTE_CLASSID
rt->dst.tclassid = nh->nh_tclassid;
#endif
- rt->dst.lwtstate = lwtstate_get(nh->nh_lwtstate);
+ rt->dst.lwtstate = lwtstate_get(nh->fib_nh_lws);
if (unlikely(fnhe))
cached = rt_bind_exception(rt, fnhe, daddr, do_cache);
else if (do_cache)
@@ -1697,15 +1705,18 @@ static int __mkroute_input(struct sk_buff *skb,
struct in_device *in_dev,
__be32 daddr, __be32 saddr, u32 tos)
{
+ struct fib_nh_common *nhc = FIB_RES_NHC(*res);
+ struct net_device *dev = nhc->nhc_dev;
struct fib_nh_exception *fnhe;
struct rtable *rth;
+ struct fib_nh *nh;
int err;
struct in_device *out_dev;
bool do_cache;
u32 itag = 0;
/* get a working reference to the output device */
- out_dev = __in_dev_get_rcu(FIB_RES_DEV(*res));
+ out_dev = __in_dev_get_rcu(dev);
if (!out_dev) {
net_crit_ratelimited("Bug in ip_route_input_slow(). Please report.\n");
return -EINVAL;
@@ -1722,10 +1733,13 @@ static int __mkroute_input(struct sk_buff *skb,
do_cache = res->fi && !itag;
if (out_dev == in_dev && err && IN_DEV_TX_REDIRECTS(out_dev) &&
- skb->protocol == htons(ETH_P_IP) &&
- (IN_DEV_SHARED_MEDIA(out_dev) ||
- inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res))))
- IPCB(skb)->flags |= IPSKB_DOREDIRECT;
+ skb->protocol == htons(ETH_P_IP)) {
+ __be32 gw = nhc->nhc_family == AF_INET ? nhc->nhc_gw.ipv4 : 0;
+
+ if (IN_DEV_SHARED_MEDIA(out_dev) ||
+ inet_addr_onlink(out_dev, saddr, gw))
+ IPCB(skb)->flags |= IPSKB_DOREDIRECT;
+ }
if (skb->protocol != htons(ETH_P_IP)) {
/* Not IP (i.e. ARP). Do not create route, if it is
@@ -1742,12 +1756,13 @@ static int __mkroute_input(struct sk_buff *skb,
}
}
- fnhe = find_exception(&FIB_RES_NH(*res), daddr);
+ nh = container_of(nhc, struct fib_nh, nh_common);
+ fnhe = find_exception(nh, daddr);
if (do_cache) {
if (fnhe)
rth = rcu_dereference(fnhe->fnhe_rth_input);
else
- rth = rcu_dereference(FIB_RES_NH(*res).nh_rth_input);
+ rth = rcu_dereference(nh->nh_rth_input);
if (rt_cache_valid(rth)) {
skb_dst_set_noref(skb, &rth->dst);
goto out;
@@ -2041,7 +2056,11 @@ local_input:
do_cache = false;
if (res->fi) {
if (!itag) {
- rth = rcu_dereference(FIB_RES_NH(*res).nh_rth_input);
+ struct fib_nh_common *nhc = FIB_RES_NHC(*res);
+ struct fib_nh *nh;
+
+ nh = container_of(nhc, struct fib_nh, nh_common);
+ rth = rcu_dereference(nh->nh_rth_input);
if (rt_cache_valid(rth)) {
skb_dst_set_noref(skb, &rth->dst);
err = 0;
@@ -2071,15 +2090,17 @@ local_input:
}
if (do_cache) {
- struct fib_nh *nh = &FIB_RES_NH(*res);
+ struct fib_nh_common *nhc = FIB_RES_NHC(*res);
+ struct fib_nh *nh;
- rth->dst.lwtstate = lwtstate_get(nh->nh_lwtstate);
+ rth->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate);
if (lwtunnel_input_redirect(rth->dst.lwtstate)) {
WARN_ON(rth->dst.input == lwtunnel_input);
rth->dst.lwtstate->orig_input = rth->dst.input;
rth->dst.input = lwtunnel_input;
}
+ nh = container_of(nhc, struct fib_nh, nh_common);
if (unlikely(!rt_cache_route(nh, rth)))
rt_add_uncached_list(rth);
}
@@ -2251,8 +2272,9 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
fnhe = NULL;
do_cache &= fi != NULL;
if (fi) {
+ struct fib_nh_common *nhc = FIB_RES_NHC(*res);
+ struct fib_nh *nh = container_of(nhc, struct fib_nh, nh_common);
struct rtable __rcu **prth;
- struct fib_nh *nh = &FIB_RES_NH(*res);
fnhe = find_exception(nh, fl4->daddr);
if (!do_cache)
@@ -2262,8 +2284,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
} else {
if (unlikely(fl4->flowi4_flags &
FLOWI_FLAG_KNOWN_NH &&
- !(nh->nh_gw &&
- nh->nh_scope == RT_SCOPE_LINK))) {
+ !(nhc->nhc_has_gw &&
+ nhc->nhc_scope == RT_SCOPE_LINK))) {
do_cache = false;
goto add;
}
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index e531344611a0..008545f63667 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -216,16 +216,15 @@ struct sock *tcp_get_cookie_sock(struct sock *sk, struct sk_buff *skb,
refcount_set(&req->rsk_refcnt, 1);
tcp_sk(child)->tsoffset = tsoff;
sock_rps_save_rxhash(child, skb);
- if (!inet_csk_reqsk_queue_add(sk, req, child)) {
- bh_unlock_sock(child);
- sock_put(child);
- child = NULL;
- reqsk_put(req);
- }
- } else {
- reqsk_free(req);
+ if (inet_csk_reqsk_queue_add(sk, req, child))
+ return child;
+
+ bh_unlock_sock(child);
+ sock_put(child);
}
- return child;
+ __reqsk_free(req);
+
+ return NULL;
}
EXPORT_SYMBOL(tcp_get_cookie_sock);
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index ba0fc4b18465..2316c08e9591 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -549,6 +549,15 @@ static struct ctl_table ipv4_table[] = {
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
},
+ {
+ .procname = "fib_sync_mem",
+ .data = &sysctl_fib_sync_mem,
+ .maxlen = sizeof(sysctl_fib_sync_mem),
+ .mode = 0644,
+ .proc_handler = proc_douintvec_minmax,
+ .extra1 = &sysctl_fib_sync_mem_min,
+ .extra2 = &sysctl_fib_sync_mem_max,
+ },
{ }
};
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 6baa6dc1b13b..603e770d59b3 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -865,6 +865,18 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp,
{
struct sk_buff *skb;
+ if (likely(!size)) {
+ skb = sk->sk_tx_skb_cache;
+ if (skb && !skb_cloned(skb)) {
+ skb->truesize -= skb->data_len;
+ sk->sk_tx_skb_cache = NULL;
+ pskb_trim(skb, 0);
+ INIT_LIST_HEAD(&skb->tcp_tsorted_anchor);
+ skb_shinfo(skb)->tx_flags = 0;
+ memset(TCP_SKB_CB(skb), 0, sizeof(struct tcp_skb_cb));
+ return skb;
+ }
+ }
/* The TCP header must be at least 32-bit aligned. */
size = ALIGN(size, 4);
@@ -1098,30 +1110,6 @@ int tcp_sendpage(struct sock *sk, struct page *page, int offset,
}
EXPORT_SYMBOL(tcp_sendpage);
-/* Do not bother using a page frag for very small frames.
- * But use this heuristic only for the first skb in write queue.
- *
- * Having no payload in skb->head allows better SACK shifting
- * in tcp_shift_skb_data(), reducing sack/rack overhead, because
- * write queue has less skbs.
- * Each skb can hold up to MAX_SKB_FRAGS * 32Kbytes, or ~0.5 MB.
- * This also speeds up tso_fragment(), since it wont fallback
- * to tcp_fragment().
- */
-static int linear_payload_sz(bool first_skb)
-{
- if (first_skb)
- return SKB_WITH_OVERHEAD(2048 - MAX_TCP_HEADER);
- return 0;
-}
-
-static int select_size(bool first_skb, bool zc)
-{
- if (zc)
- return 0;
- return linear_payload_sz(first_skb);
-}
-
void tcp_free_fastopen_req(struct tcp_sock *tp)
{
if (tp->fastopen_req) {
@@ -1272,7 +1260,6 @@ restart:
if (copy <= 0 || !tcp_skb_can_collapse_to(skb)) {
bool first_skb;
- int linear;
new_segment:
if (!sk_stream_memory_free(sk))
@@ -1283,8 +1270,7 @@ new_segment:
goto restart;
}
first_skb = tcp_rtx_and_write_queues_empty(sk);
- linear = select_size(first_skb, zc);
- skb = sk_stream_alloc_skb(sk, linear, sk->sk_allocation,
+ skb = sk_stream_alloc_skb(sk, 0, sk->sk_allocation,
first_skb);
if (!skb)
goto wait_for_memory;
@@ -2552,6 +2538,11 @@ void tcp_write_queue_purge(struct sock *sk)
sk_wmem_free_skb(sk, skb);
}
tcp_rtx_queue_purge(sk);
+ skb = sk->sk_tx_skb_cache;
+ if (skb) {
+ __kfree_skb(skb);
+ sk->sk_tx_skb_cache = NULL;
+ }
INIT_LIST_HEAD(&tcp_sk(sk)->tsorted_sent_queue);
sk_mem_reclaim(sk);
tcp_clear_all_retrans_hints(tcp_sk(sk));
@@ -2587,6 +2578,10 @@ int tcp_disconnect(struct sock *sk, int flags)
tcp_clear_xmit_timers(sk);
__skb_queue_purge(&sk->sk_receive_queue);
+ if (sk->sk_rx_skb_cache) {
+ __kfree_skb(sk->sk_rx_skb_cache);
+ sk->sk_rx_skb_cache = NULL;
+ }
tp->copied_seq = tp->rcv_nxt;
tp->urg_data = 0;
tcp_write_queue_purge(sk);
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 5def3c48870e..6660ce2a7333 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -6263,6 +6263,11 @@ static inline void pr_drop_req(struct request_sock *req, __u16 port, int family)
* congestion control: Linux DCTCP asserts ECT on all packets,
* including SYN, which is most optimal solution; however,
* others, such as FreeBSD do not.
+ *
+ * Exception: At least one of the reserved bits of the TCP header (th->res1) is
+ * set, indicating the use of a future TCP extension (such as AccECN). See
+ * RFC8311 ยง4.3 which updates RFC3168 to allow the development of such
+ * extensions.
*/
static void tcp_ecn_create_request(struct request_sock *req,
const struct sk_buff *skb,
@@ -6282,7 +6287,7 @@ static void tcp_ecn_create_request(struct request_sock *req,
ecn_ok_dst = dst_feature(dst, DST_FEATURE_ECN_MASK);
ecn_ok = net->ipv4.sysctl_tcp_ecn || ecn_ok_dst;
- if ((!ect && ecn_ok) || tcp_ca_needs_ecn(listen_sk) ||
+ if (((!ect || th->res1) && ecn_ok) || tcp_ca_needs_ecn(listen_sk) ||
(ecn_ok_dst & DST_FEATURE_ECN_CA) ||
tcp_bpf_ca_needs_ecn((struct sock *)req))
inet_rsk(req)->ecn_ok = 1;
@@ -6502,8 +6507,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
reqsk_fastopen_remove(fastopen_sk, req, false);
bh_unlock_sock(fastopen_sk);
sock_put(fastopen_sk);
- reqsk_put(req);
- goto drop;
+ goto drop_and_free;
}
sk->sk_data_ready(sk);
bh_unlock_sock(fastopen_sk);
@@ -6527,7 +6531,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
drop_and_release:
dst_release(dst);
drop_and_free:
- reqsk_free(req);
+ __reqsk_free(req);
drop:
tcp_listendrop(sk);
return 0;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 2f8039a26b08..faa6fa619f59 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1774,6 +1774,7 @@ static void tcp_v4_fill_cb(struct sk_buff *skb, const struct iphdr *iph,
int tcp_v4_rcv(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
+ struct sk_buff *skb_to_free;
int sdif = inet_sdif(skb);
const struct iphdr *iph;
const struct tcphdr *th;
@@ -1905,11 +1906,17 @@ process:
tcp_segs_in(tcp_sk(sk), skb);
ret = 0;
if (!sock_owned_by_user(sk)) {
+ skb_to_free = sk->sk_rx_skb_cache;
+ sk->sk_rx_skb_cache = NULL;
ret = tcp_v4_do_rcv(sk, skb);
- } else if (tcp_add_backlog(sk, skb)) {
- goto discard_and_relse;
+ } else {
+ if (tcp_add_backlog(sk, skb))
+ goto discard_and_relse;
+ skb_to_free = NULL;
}
bh_unlock_sock(sk);
+ if (skb_to_free)
+ __kfree_skb(skb_to_free);
put_and_return:
if (refcounted)
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index b467a7cabf40..4ccec4c705f7 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -953,12 +953,10 @@ static const struct genl_ops tcp_metrics_nl_ops[] = {
.cmd = TCP_METRICS_CMD_GET,
.doit = tcp_metrics_nl_cmd_get,
.dumpit = tcp_metrics_nl_dump,
- .policy = tcp_metrics_nl_policy,
},
{
.cmd = TCP_METRICS_CMD_DEL,
.doit = tcp_metrics_nl_cmd_del,
- .policy = tcp_metrics_nl_policy,
.flags = GENL_ADMIN_PERM,
},
};
@@ -968,6 +966,7 @@ static struct genl_family tcp_metrics_nl_family __ro_after_init = {
.name = TCP_METRICS_GENL_NAME,
.version = TCP_METRICS_GENL_VERSION,
.maxattr = TCP_METRICS_ATTR_MAX,
+ .policy = tcp_metrics_nl_policy,
.netnsok = true,
.module = THIS_MODULE,
.ops = tcp_metrics_nl_ops,
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 4522579aaca2..e265d1aeeb66 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -52,12 +52,8 @@ void tcp_mstamp_refresh(struct tcp_sock *tp)
{
u64 val = tcp_clock_ns();
- if (val > tp->tcp_clock_cache)
- tp->tcp_clock_cache = val;
-
- val = div_u64(val, NSEC_PER_USEC);
- if (val > tp->tcp_mstamp)
- tp->tcp_mstamp = val;
+ tp->tcp_clock_cache = val;
+ tp->tcp_mstamp = div_u64(val, NSEC_PER_USEC);
}
static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 08:11:45 +0100