#include <net/ip_fib.h>
#include <net/netlink.h>
#include <net/nexthop.h>
+#include <net/lwtunnel.h>
#include "fib_lookup.h"
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);
#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))
return -1;
onh++;
payload += nla_total_size((RTAX_MAX * nla_total_size(4)));
if (fi->fib_nhs) {
+ size_t nh_encapsize = 0;
/* Also handles the special case fib_nhs == 1 */
/* each nexthop is packed in an attribute */
/* may contain flow and gateway attribute */
nhsize += 2 * nla_total_size(4);
+ /* grab encap info */
+ for_nexthops(fi) {
+ if (nh->nh_lwtstate) {
+ /* RTA_ENCAP_TYPE */
+ nh_encapsize += lwtunnel_get_encap_size(
+ nh->nh_lwtstate);
+ /* RTA_ENCAP */
+ nh_encapsize += nla_total_size(2);
+ }
+ } endfor_nexthops(fi);
+
/* all nexthops are packed in a nested attribute */
- payload += nla_total_size(fi->fib_nhs * nhsize);
+ payload += nla_total_size((fi->fib_nhs * nhsize) +
+ nh_encapsize);
+
}
return payload;
if (n) {
state = n->nud_state;
neigh_release(n);
+ } else {
+ return 0;
}
if (state == NUD_REACHABLE)
return 0;
if ((state & NUD_VALID) && order != dflt)
return 0;
if ((state & NUD_VALID) ||
- (*last_idx < 0 && order > dflt)) {
+ (*last_idx < 0 && order > dflt && state != NUD_INCOMPLETE)) {
*last_resort = fi;
*last_idx = order;
}
static int fib_get_nhs(struct fib_info *fi, struct rtnexthop *rtnh,
int remaining, struct fib_config *cfg)
{
+ struct net *net = cfg->fc_nlinfo.nl_net;
+ int ret;
+
change_nexthops(fi) {
int attrlen;
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 net_device *dev = NULL;
+ struct nlattr *nla_entype;
+
+ nla_entype = nla_find(attrs, attrlen,
+ RTA_ENCAP_TYPE);
+ if (!nla_entype)
+ goto err_inval;
+ if (cfg->fc_oif)
+ dev = __dev_get_by_index(net, cfg->fc_oif);
+ ret = lwtunnel_build_state(dev, nla_get_u16(
+ nla_entype),
+ nla, AF_INET, cfg,
+ &lwtstate);
+ if (ret)
+ goto errout;
+ nexthop_nh->nh_lwtstate =
+ lwtstate_get(lwtstate);
+ }
}
rtnh = rtnh_next(rtnh, &remaining);
} endfor_nexthops(fi);
return 0;
+
+err_inval:
+ ret = -EINVAL;
+
+errout:
+ return ret;
}
#endif
+static int fib_encap_match(struct net *net, u16 encap_type,
+ struct nlattr *encap,
+ int oif, const struct fib_nh *nh,
+ const struct fib_config *cfg)
+{
+ struct lwtunnel_state *lwtstate;
+ struct net_device *dev = NULL;
+ int ret, result = 0;
+
+ if (encap_type == LWTUNNEL_ENCAP_NONE)
+ return 0;
+
+ if (oif)
+ dev = __dev_get_by_index(net, oif);
+ ret = lwtunnel_build_state(dev, encap_type, encap,
+ AF_INET, cfg, &lwtstate);
+ if (!ret) {
+ result = lwtunnel_cmp_encap(lwtstate, nh->nh_lwtstate);
+ lwtstate_free(lwtstate);
+ }
+
+ return result;
+}
+
int fib_nh_match(struct fib_config *cfg, struct fib_info *fi)
{
+ struct net *net = cfg->fc_nlinfo.nl_net;
#ifdef CONFIG_IP_ROUTE_MULTIPATH
struct rtnexthop *rtnh;
int remaining;
return 1;
if (cfg->fc_oif || cfg->fc_gw) {
+ if (cfg->fc_encap) {
+ if (fib_encap_match(net, cfg->fc_encap_type,
+ cfg->fc_encap, cfg->fc_oif,
+ fi->fib_nh, cfg))
+ return 1;
+ }
if ((!cfg->fc_oif || cfg->fc_oif == fi->fib_nh->nh_oif) &&
(!cfg->fc_gw || cfg->fc_gw == fi->fib_nh->nh_gw))
return 0;
static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
struct fib_nh *nh)
{
- int err;
+ int err = 0;
struct net *net;
struct net_device *dev;
struct fib_result res;
if (nh->nh_flags & RTNH_F_ONLINK) {
+ unsigned int addr_type;
if (cfg->fc_scope >= RT_SCOPE_LINK)
return -EINVAL;
- if (inet_addr_type(net, nh->nh_gw) != RTN_UNICAST)
- return -EINVAL;
dev = __dev_get_by_index(net, nh->nh_oif);
if (!dev)
return -ENODEV;
if (!(dev->flags & IFF_UP))
return -ENETDOWN;
+ addr_type = inet_addr_type_dev_table(net, dev, nh->nh_gw);
+ if (addr_type != RTN_UNICAST)
+ return -EINVAL;
if (!netif_carrier_ok(dev))
nh->nh_flags |= RTNH_F_LINKDOWN;
nh->nh_dev = dev;
}
rcu_read_lock();
{
+ struct fib_table *tbl = NULL;
struct flowi4 fl4 = {
.daddr = nh->nh_gw,
.flowi4_scope = cfg->fc_scope + 1,
/* It is not necessary, but requires a bit of thinking */
if (fl4.flowi4_scope < RT_SCOPE_LINK)
fl4.flowi4_scope = RT_SCOPE_LINK;
- err = fib_lookup(net, &fl4, &res,
- FIB_LOOKUP_IGNORE_LINKSTATE);
+
+ if (cfg->fc_table)
+ tbl = fib_get_table(net, cfg->fc_table);
+
+ if (tbl)
+ err = fib_table_lookup(tbl, &fl4, &res,
+ FIB_LOOKUP_IGNORE_LINKSTATE |
+ FIB_LOOKUP_NOREF);
+
+ /* on error or if no table given do full lookup. This
+ * is needed for example when nexthops are in the local
+ * table rather than the given table
+ */
+ if (!tbl || err) {
+ err = fib_lookup(net, &fl4, &res,
+ FIB_LOOKUP_IGNORE_LINKSTATE);
+ }
+
if (err) {
rcu_read_unlock();
return err;
return nh->nh_saddr;
}
+static bool fib_valid_prefsrc(struct fib_config *cfg, __be32 fib_prefsrc)
+{
+ if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
+ fib_prefsrc != cfg->fc_dst) {
+ u32 tb_id = cfg->fc_table;
+
+ if (tb_id == RT_TABLE_MAIN)
+ tb_id = RT_TABLE_LOCAL;
+
+ if (inet_addr_type_table(cfg->fc_nlinfo.nl_net,
+ fib_prefsrc, tb_id) != RTN_LOCAL) {
+ return false;
+ }
+ }
+ return true;
+}
+
+static int
+fib_convert_metrics(struct fib_info *fi, const struct fib_config *cfg)
+{
+ bool ecn_ca = false;
+ struct nlattr *nla;
+ int remaining;
+
+ if (!cfg->fc_mx)
+ return 0;
+
+ nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
+ int type = nla_type(nla);
+ u32 val;
+
+ if (!type)
+ continue;
+ if (type > RTAX_MAX)
+ return -EINVAL;
+
+ if (type == RTAX_CC_ALGO) {
+ char tmp[TCP_CA_NAME_MAX];
+
+ nla_strlcpy(tmp, nla, sizeof(tmp));
+ val = tcp_ca_get_key_by_name(tmp, &ecn_ca);
+ if (val == TCP_CA_UNSPEC)
+ return -EINVAL;
+ } else {
+ val = nla_get_u32(nla);
+ }
+ if (type == RTAX_ADVMSS && val > 65535 - 40)
+ val = 65535 - 40;
+ if (type == RTAX_MTU && val > 65535 - 15)
+ val = 65535 - 15;
+ if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK))
+ return -EINVAL;
+ fi->fib_metrics[type - 1] = val;
+ }
+
+ if (ecn_ca)
+ fi->fib_metrics[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA;
+
+ return 0;
+}
+
struct fib_info *fib_create_info(struct fib_config *cfg)
{
int err;
goto failure;
} endfor_nexthops(fi)
- if (cfg->fc_mx) {
- struct nlattr *nla;
- int remaining;
-
- nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
- int type = nla_type(nla);
-
- if (type) {
- u32 val;
-
- if (type > RTAX_MAX)
- goto err_inval;
- if (type == RTAX_CC_ALGO) {
- char tmp[TCP_CA_NAME_MAX];
-
- nla_strlcpy(tmp, nla, sizeof(tmp));
- val = tcp_ca_get_key_by_name(tmp);
- if (val == TCP_CA_UNSPEC)
- goto err_inval;
- } else {
- val = nla_get_u32(nla);
- }
- if (type == RTAX_ADVMSS && val > 65535 - 40)
- val = 65535 - 40;
- if (type == RTAX_MTU && val > 65535 - 15)
- val = 65535 - 15;
- fi->fib_metrics[type - 1] = val;
- }
- }
- }
+ err = fib_convert_metrics(fi, cfg);
+ if (err)
+ goto failure;
if (cfg->fc_mp) {
#ifdef CONFIG_IP_ROUTE_MULTIPATH
} else {
struct fib_nh *nh = fi->fib_nh;
+ if (cfg->fc_encap) {
+ struct lwtunnel_state *lwtstate;
+ struct net_device *dev = NULL;
+
+ if (cfg->fc_encap_type == LWTUNNEL_ENCAP_NONE)
+ goto err_inval;
+ if (cfg->fc_oif)
+ dev = __dev_get_by_index(net, cfg->fc_oif);
+ err = lwtunnel_build_state(dev, cfg->fc_encap_type,
+ cfg->fc_encap, AF_INET, cfg,
+ &lwtstate);
+ if (err)
+ goto failure;
+
+ nh->nh_lwtstate = lwtstate_get(lwtstate);
+ }
nh->nh_oif = cfg->fc_oif;
nh->nh_gw = cfg->fc_gw;
nh->nh_flags = cfg->fc_flags;
fi->fib_flags |= RTNH_F_LINKDOWN;
}
- if (fi->fib_prefsrc) {
- if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
- fi->fib_prefsrc != cfg->fc_dst)
- if (inet_addr_type(net, fi->fib_prefsrc) != RTN_LOCAL)
- goto err_inval;
- }
+ if (fi->fib_prefsrc && !fib_valid_prefsrc(cfg, fi->fib_prefsrc))
+ goto err_inval;
change_nexthops(fi) {
fib_info_update_nh_saddr(net, nexthop_nh);
nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid))
goto nla_put_failure;
#endif
+ if (fi->fib_nh->nh_lwtstate)
+ lwtunnel_fill_encap(skb, fi->fib_nh->nh_lwtstate);
}
#ifdef CONFIG_IP_ROUTE_MULTIPATH
if (fi->fib_nhs > 1) {
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);
/* length of rtnetlink header + attributes */
rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh;
} endfor_nexthops(fi);
projects / linux-2.6-block.git / blobdiff