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authorPatrick McHardy <kaber@trash.net>2009-12-03 01:25:56 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-03 12:14:36 -0800
commit1b038a5e60c7812f19818e8a5df96d029e49c38f (patch)
treeeea09368802178a64429beb656a03a2cc71e2f42 /net
parentnet 02/05: fib_rules: rename ifindex/ifname/FRA_IFNAME to iifindex/iifname/FRA_IIFNAME (diff)
downloadlinux-dev-1b038a5e60c7812f19818e8a5df96d029e49c38f.tar.xz
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net 03/05: fib_rules: add oif classification
commit 68144d350f4f6c348659c825cde6a82b34c27a91 Author: Patrick McHardy <kaber@trash.net> Date: Thu Dec 3 12:05:25 2009 +0100 net: fib_rules: add oif classification Support routing table lookup based on the flow's oif. This is useful to classify packets originating from sockets bound to interfaces differently. The route cache already includes the oif and needs no changes. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/fib_rules.c33
1 files changed, 32 insertions, 1 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 8e8028cdc87f..d1a70ad4b544 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -138,6 +138,9 @@ static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
if (rule->iifindex && (rule->iifindex != fl->iif))
goto out;
+ if (rule->oifindex && (rule->oifindex != fl->oif))
+ goto out;
+
if ((rule->mark ^ fl->mark) & rule->mark_mask)
goto out;
@@ -258,6 +261,16 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
rule->iifindex = dev->ifindex;
}
+ if (tb[FRA_OIFNAME]) {
+ struct net_device *dev;
+
+ rule->oifindex = -1;
+ nla_strlcpy(rule->oifname, tb[FRA_OIFNAME], IFNAMSIZ);
+ dev = __dev_get_by_name(net, rule->oifname);
+ if (dev)
+ rule->oifindex = dev->ifindex;
+ }
+
if (tb[FRA_FWMARK]) {
rule->mark = nla_get_u32(tb[FRA_FWMARK]);
if (rule->mark)
@@ -392,6 +405,10 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
nla_strcmp(tb[FRA_IIFNAME], rule->iifname))
continue;
+ if (tb[FRA_OIFNAME] &&
+ nla_strcmp(tb[FRA_OIFNAME], rule->oifname))
+ continue;
+
if (tb[FRA_FWMARK] &&
(rule->mark != nla_get_u32(tb[FRA_FWMARK])))
continue;
@@ -448,6 +465,7 @@ static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops,
{
size_t payload = NLMSG_ALIGN(sizeof(struct fib_rule_hdr))
+ nla_total_size(IFNAMSIZ) /* FRA_IIFNAME */
+ + nla_total_size(IFNAMSIZ) /* FRA_OIFNAME */
+ nla_total_size(4) /* FRA_PRIORITY */
+ nla_total_size(4) /* FRA_TABLE */
+ nla_total_size(4) /* FRA_FWMARK */
@@ -488,6 +506,13 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
frh->flags |= FIB_RULE_IIF_DETACHED;
}
+ if (rule->oifname[0]) {
+ NLA_PUT_STRING(skb, FRA_OIFNAME, rule->oifname);
+
+ if (rule->oifindex == -1)
+ frh->flags |= FIB_RULE_OIF_DETACHED;
+ }
+
if (rule->pref)
NLA_PUT_U32(skb, FRA_PRIORITY, rule->pref);
@@ -603,6 +628,9 @@ static void attach_rules(struct list_head *rules, struct net_device *dev)
if (rule->iifindex == -1 &&
strcmp(dev->name, rule->iifname) == 0)
rule->iifindex = dev->ifindex;
+ if (rule->oifindex == -1 &&
+ strcmp(dev->name, rule->oifname) == 0)
+ rule->oifindex = dev->ifindex;
}
}
@@ -610,9 +638,12 @@ static void detach_rules(struct list_head *rules, struct net_device *dev)
{
struct fib_rule *rule;
- list_for_each_entry(rule, rules, list)
+ list_for_each_entry(rule, rules, list) {
if (rule->iifindex == dev->ifindex)
rule->iifindex = -1;
+ if (rule->oifindex == dev->ifindex)
+ rule->oifindex = -1;
+ }
}