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authorStefan Tomanek <stefan.tomanek@wertarbyte.de>2013-08-03 14:14:43 +0200
committerDavid S. Miller <davem@davemloft.net>2013-08-03 10:40:23 -0700
commit73f5698e77219bfc3ea1903759fe8e20ab5b285e (patch)
treef3b64e87cc6ce4d7749ddfd9e993421b0c53a02c /net/core/fib_rules.c
parent0c0667a8548ef2985038a5a1d0fa0f64e2774694 (diff)
downloadop-kernel-dev-73f5698e77219bfc3ea1903759fe8e20ab5b285e.zip
op-kernel-dev-73f5698e77219bfc3ea1903759fe8e20ab5b285e.tar.gz
fib_rules: fix suppressor names and default values
This change brings the suppressor attribute names into line; it also changes the data types to provide a more consistent interface. While -1 indicates that the suppressor is not enabled, values >= 0 for suppress_prefixlen or suppress_ifgroup reject routing decisions violating the constraint. This changes the previously presented behaviour of suppress_prefixlen, where a prefix length _less_ than the attribute value was rejected. After this change, a prefix length less than *or* equal to the value is considered a violation of the rule constraint. It also changes the default values for default and newly added rules (disabling any suppression for those). Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/fib_rules.c')
-rw-r--r--net/core/fib_rules.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 5040a61..2e65413 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -33,6 +33,9 @@ int fib_default_rule_add(struct fib_rules_ops *ops,
r->flags = flags;
r->fr_net = hold_net(ops->fro_net);
+ r->suppress_prefixlen = -1;
+ r->suppress_ifgroup = -1;
+
/* The lock is not required here, the list in unreacheable
* at the moment this function is called */
list_add_tail(&r->list, &ops->rules_list);
@@ -340,11 +343,15 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh)
rule->action = frh->action;
rule->flags = frh->flags;
rule->table = frh_get_table(frh, tb);
- if (tb[FRA_TABLE_PREFIXLEN_MIN])
- rule->table_prefixlen_min = nla_get_u8(tb[FRA_TABLE_PREFIXLEN_MIN]);
+ if (tb[FRA_SUPPRESS_PREFIXLEN])
+ rule->suppress_prefixlen = nla_get_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
+ else
+ rule->suppress_prefixlen = -1;
if (tb[FRA_SUPPRESS_IFGROUP])
rule->suppress_ifgroup = nla_get_u32(tb[FRA_SUPPRESS_IFGROUP]);
+ else
+ rule->suppress_ifgroup = -1;
if (!tb[FRA_PRIORITY] && ops->default_pref)
rule->pref = ops->default_pref(ops);
@@ -531,7 +538,7 @@ static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops,
+ nla_total_size(IFNAMSIZ) /* FRA_OIFNAME */
+ nla_total_size(4) /* FRA_PRIORITY */
+ nla_total_size(4) /* FRA_TABLE */
- + nla_total_size(1) /* FRA_TABLE_PREFIXLEN_MIN */
+ + nla_total_size(4) /* FRA_SUPPRESS_PREFIXLEN */
+ nla_total_size(4) /* FRA_SUPPRESS_IFGROUP */
+ nla_total_size(4) /* FRA_FWMARK */
+ nla_total_size(4); /* FRA_FWMASK */
@@ -558,7 +565,7 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
frh->table = rule->table;
if (nla_put_u32(skb, FRA_TABLE, rule->table))
goto nla_put_failure;
- if (nla_put_u8(skb, FRA_TABLE_PREFIXLEN_MIN, rule->table_prefixlen_min))
+ if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen))
goto nla_put_failure;
frh->res1 = 0;
frh->res2 = 0;
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