diff options
Diffstat (limited to 'net/ipv4/fib_semantics.c')
| -rw-r--r-- | net/ipv4/fib_semantics.c | 65 |
1 files changed, 53 insertions, 12 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index ec3a9ce281a6..01ed22139ac2 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -44,6 +44,7 @@ #include <net/netlink.h> #include <net/nexthop.h> #include <net/lwtunnel.h> +#include <net/fib_notifier.h> #include "fib_lookup.h" @@ -219,7 +220,7 @@ static void free_fib_info_rcu(struct rcu_head *head) } endfor_nexthops(fi); m = fi->fib_metrics; - if (m != &dst_default_metrics && atomic_dec_and_test(&m->refcnt)) + if (m != &dst_default_metrics && refcount_dec_and_test(&m->refcnt)) kfree(m); kfree(fi); } @@ -695,6 +696,40 @@ int fib_nh_match(struct fib_config *cfg, struct fib_info *fi, return 0; } +bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi) +{ + struct nlattr *nla; + int remaining; + + if (!cfg->fc_mx) + return true; + + 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 false; + + if (type == RTAX_CC_ALGO) { + char tmp[TCP_CA_NAME_MAX]; + bool ecn_ca = false; + + nla_strlcpy(tmp, nla, sizeof(tmp)); + val = tcp_ca_get_key_by_name(tmp, &ecn_ca); + } else { + val = nla_get_u32(nla); + } + + if (fi->fib_metrics->metrics[type - 1] != val) + return false; + } + + return true; +} + /* * Picture @@ -1089,7 +1124,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg, kfree(fi); return ERR_PTR(err); } - atomic_set(&fi->fib_metrics->refcnt, 1); + refcount_set(&fi->fib_metrics->refcnt, 1); } else { fi->fib_metrics = (struct dst_metrics *)&dst_default_metrics; } @@ -1330,8 +1365,6 @@ 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) { - struct in_device *in_dev; - if (fi->fib_nh->nh_gw && nla_put_in_addr(skb, RTA_GATEWAY, fi->fib_nh->nh_gw)) goto nla_put_failure; @@ -1339,11 +1372,17 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event, nla_put_u32(skb, RTA_OIF, fi->fib_nh->nh_oif)) goto nla_put_failure; if (fi->fib_nh->nh_flags & RTNH_F_LINKDOWN) { - in_dev = __in_dev_get_rtnl(fi->fib_nh->nh_dev); + 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; #ifdef CONFIG_IP_ROUTE_CLASSID if (fi->fib_nh[0].nh_tclassid && nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid)) @@ -1363,18 +1402,20 @@ int fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event, goto nla_put_failure; for_nexthops(fi) { - struct in_device *in_dev; - 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) { - in_dev = __in_dev_get_rtnl(nh->nh_dev); + 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; @@ -1451,14 +1492,14 @@ static int call_fib_nh_notifiers(struct fib_nh *fib_nh, if (IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && fib_nh->nh_flags & RTNH_F_LINKDOWN) break; - return call_fib_notifiers(dev_net(fib_nh->nh_dev), event_type, - &info.info); + return call_fib4_notifiers(dev_net(fib_nh->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_fib_notifiers(dev_net(fib_nh->nh_dev), - event_type, &info.info); + return call_fib4_notifiers(dev_net(fib_nh->nh_dev), + event_type, &info.info); default: break; } |