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net: fib_rules: support for match on ip_proto, sport and dport

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uapi for ip_proto, sport and dport range match
in fib rules.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
2018-02-28 22:40:16 -05:00
committed by David S. Miller
parent 2927499157
commit bfff486265
3 changed files with 133 additions and 3 deletions
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92
net/core/fib_rules.c
View File

@@ -33,6 +33,10 @@ bool fib_rule_matchall(const struct fib_rule *rule)
if (!uid_eq(rule->uid_range.start, fib_kuid_range_unset.start) ||
!uid_eq(rule->uid_range.end, fib_kuid_range_unset.end))
return false;
if (fib_rule_port_range_set(&rule->sport_range))
return false;
if (fib_rule_port_range_set(&rule->dport_range))
return false;
return true;
}
EXPORT_SYMBOL_GPL(fib_rule_matchall);
@@ -221,6 +225,26 @@ static int nla_put_uid_range(struct sk_buff *skb, struct fib_kuid_range *range)
return nla_put(skb, FRA_UID_RANGE, sizeof(out), &out);
}
static int nla_get_port_range(struct nlattr *pattr,
struct fib_rule_port_range *port_range)
{
const struct fib_rule_port_range *pr = nla_data(pattr);
if (!fib_rule_port_range_valid(pr))
return -EINVAL;
port_range->start = pr->start;
port_range->end = pr->end;
return 0;
}
static int nla_put_port_range(struct sk_buff *skb, int attrtype,
struct fib_rule_port_range *range)
{
return nla_put(skb, attrtype, sizeof(*range), range);
}
static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops,
struct flowi *fl, int flags,
struct fib_lookup_arg *arg)
@@ -425,6 +449,17 @@ static int rule_exists(struct fib_rules_ops *ops, struct fib_rule_hdr *frh,
!uid_eq(r->uid_range.end, rule->uid_range.end))
continue;
if (r->ip_proto != rule->ip_proto)
continue;
if (!fib_rule_port_range_compare(&r->sport_range,
&rule->sport_range))
continue;
if (!fib_rule_port_range_compare(&r->dport_range,
&rule->dport_range))
continue;
if (!ops->compare(r, frh, tb))
continue;
return 1;
@@ -569,6 +604,23 @@ int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
rule->uid_range = fib_kuid_range_unset;
}
if (tb[FRA_IP_PROTO])
rule->ip_proto = nla_get_u8(tb[FRA_IP_PROTO]);
if (tb[FRA_SPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_SPORT_RANGE],
&rule->sport_range);
if (err)
goto errout_free;
}
if (tb[FRA_DPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_DPORT_RANGE],
&rule->dport_range);
if (err)
goto errout_free;
}
if ((nlh->nlmsg_flags & NLM_F_EXCL) &&
rule_exists(ops, frh, tb, rule)) {
err = -EEXIST;
@@ -634,6 +686,8 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
{
struct net *net = sock_net(skb->sk);
struct fib_rule_hdr *frh = nlmsg_data(nlh);
struct fib_rule_port_range sprange = {0, 0};
struct fib_rule_port_range dprange = {0, 0};
struct fib_rules_ops *ops = NULL;
struct fib_rule *rule, *r;
struct nlattr *tb[FRA_MAX+1];
@@ -667,6 +721,20 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
range = fib_kuid_range_unset;
}
if (tb[FRA_SPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_SPORT_RANGE],
&sprange);
if (err)
goto errout;
}
if (tb[FRA_DPORT_RANGE]) {
err = nla_get_port_range(tb[FRA_DPORT_RANGE],
&dprange);
if (err)
goto errout;
}
list_for_each_entry(rule, &ops->rules_list, list) {
if (tb[FRA_PROTOCOL] &&
(rule->proto != nla_get_u8(tb[FRA_PROTOCOL])))
@@ -712,6 +780,18 @@ int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
!uid_eq(rule->uid_range.end, range.end)))
continue;
if (tb[FRA_IP_PROTO] &&
(rule->ip_proto != nla_get_u8(tb[FRA_IP_PROTO])))
continue;
if (fib_rule_port_range_set(&sprange) &&
!fib_rule_port_range_compare(&rule->sport_range, &sprange))
continue;
if (fib_rule_port_range_set(&dprange) &&
!fib_rule_port_range_compare(&rule->dport_range, &dprange))
continue;
if (!ops->compare(rule, frh, tb))
continue;
@@ -790,7 +870,10 @@ static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops,
+ nla_total_size(4) /* FRA_FWMASK */
+ nla_total_size_64bit(8) /* FRA_TUN_ID */
+ nla_total_size(sizeof(struct fib_kuid_range))
+ nla_total_size(1); /* FRA_PROTOCOL */
+ nla_total_size(1) /* FRA_PROTOCOL */
+ nla_total_size(1) /* FRA_IP_PROTO */
+ nla_total_size(sizeof(struct fib_rule_port_range)) /* FRA_SPORT_RANGE */
+ nla_total_size(sizeof(struct fib_rule_port_range)); /* FRA_DPORT_RANGE */
if (ops->nlmsg_payload)
payload += ops->nlmsg_payload(rule);
@@ -855,7 +938,12 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
(rule->l3mdev &&
nla_put_u8(skb, FRA_L3MDEV, rule->l3mdev)) ||
(uid_range_set(&rule->uid_range) &&
nla_put_uid_range(skb, &rule->uid_range)))
nla_put_uid_range(skb, &rule->uid_range)) ||
(fib_rule_port_range_set(&rule->sport_range) &&
nla_put_port_range(skb, FRA_SPORT_RANGE, &rule->sport_range)) ||
(fib_rule_port_range_set(&rule->dport_range) &&
nla_put_port_range(skb, FRA_DPORT_RANGE, &rule->dport_range)) ||
(rule->ip_proto && nla_put_u8(skb, FRA_IP_PROTO, rule->ip_proto)))
goto nla_put_failure;
if (rule->suppress_ifgroup != -1) {