#include <net/ip_fib.h>
#include <net/fib_rules.h>
-static struct fib_rules_ops fib4_rules_ops;
-
struct fib4_rule
{
struct fib_rule common;
__be32 srcmask;
__be32 dst;
__be32 dstmask;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- u32 fwmark;
- u32 fwmask;
-#endif
#ifdef CONFIG_NET_CLS_ROUTE
u32 tclassid;
#endif
};
-static struct fib4_rule default_rule = {
- .common = {
- .refcnt = ATOMIC_INIT(2),
- .pref = 0x7FFF,
- .table = RT_TABLE_DEFAULT,
- .action = FR_ACT_TO_TBL,
- },
-};
-
-static struct fib4_rule main_rule = {
- .common = {
- .refcnt = ATOMIC_INIT(2),
- .pref = 0x7FFE,
- .table = RT_TABLE_MAIN,
- .action = FR_ACT_TO_TBL,
- },
-};
-
-static struct fib4_rule local_rule = {
- .common = {
- .refcnt = ATOMIC_INIT(2),
- .table = RT_TABLE_LOCAL,
- .action = FR_ACT_TO_TBL,
- .flags = FIB_RULE_PERMANENT,
- },
-};
-
-static LIST_HEAD(fib4_rules);
-
#ifdef CONFIG_NET_CLS_ROUTE
u32 fib_rules_tclass(struct fib_result *res)
{
}
#endif
-int fib_lookup(struct flowi *flp, struct fib_result *res)
+int fib_lookup(struct net *net, struct flowi *flp, struct fib_result *res)
{
struct fib_lookup_arg arg = {
.result = res,
};
int err;
- err = fib_rules_lookup(&fib4_rules_ops, flp, 0, &arg);
+ err = fib_rules_lookup(net->ipv4.rules_ops, flp, 0, &arg);
res->r = arg.rule;
return err;
goto errout;
}
- if ((tbl = fib_get_table(rule->table)) == NULL)
+ if ((tbl = fib_get_table(rule->fr_net, rule->table)) == NULL)
goto errout;
- err = tbl->tb_lookup(tbl, flp, (struct fib_result *) arg->result);
+ err = fib_table_lookup(tbl, flp, (struct fib_result *) arg->result);
if (err > 0)
err = -EAGAIN;
errout:
}
-void fib_select_default(const struct flowi *flp, struct fib_result *res)
-{
- if (res->r && res->r->action == FR_ACT_TO_TBL &&
- FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) {
- struct fib_table *tb;
- if ((tb = fib_get_table(res->r->table)) != NULL)
- tb->tb_select_default(tb, flp, res);
- }
-}
-
static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
{
struct fib4_rule *r = (struct fib4_rule *) rule;
if (r->tos && (r->tos != fl->fl4_tos))
return 0;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- if ((r->fwmark ^ fl->fl4_fwmark) & r->fwmask)
- return 0;
-#endif
-
return 1;
}
-static struct fib_table *fib_empty_table(void)
+static struct fib_table *fib_empty_table(struct net *net)
{
u32 id;
for (id = 1; id <= RT_TABLE_MAX; id++)
- if (fib_get_table(id) == NULL)
- return fib_new_table(id);
+ if (fib_get_table(net, id) == NULL)
+ return fib_new_table(net, id);
return NULL;
}
-static struct nla_policy fib4_rule_policy[FRA_MAX+1] __read_mostly = {
- [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 },
- [FRA_PRIORITY] = { .type = NLA_U32 },
- [FRA_SRC] = { .type = NLA_U32 },
- [FRA_DST] = { .type = NLA_U32 },
- [FRA_FWMARK] = { .type = NLA_U32 },
- [FRA_FWMASK] = { .type = NLA_U32 },
+static const struct nla_policy fib4_rule_policy[FRA_MAX+1] = {
+ FRA_GENERIC_POLICY,
[FRA_FLOW] = { .type = NLA_U32 },
- [FRA_TABLE] = { .type = NLA_U32 },
};
static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct fib_rule_hdr *frh,
+ struct fib_rule_hdr *frh,
struct nlattr **tb)
{
+ struct net *net = sock_net(skb->sk);
int err = -EINVAL;
struct fib4_rule *rule4 = (struct fib4_rule *) rule;
- if (frh->src_len > 32 || frh->dst_len > 32 ||
- (frh->tos & ~IPTOS_TOS_MASK))
+ if (frh->tos & ~IPTOS_TOS_MASK)
goto errout;
if (rule->table == RT_TABLE_UNSPEC) {
if (rule->action == FR_ACT_TO_TBL) {
struct fib_table *table;
- table = fib_empty_table();
+ table = fib_empty_table(net);
if (table == NULL) {
err = -ENOBUFS;
goto errout;
}
}
- if (tb[FRA_SRC])
- rule4->src = nla_get_u32(tb[FRA_SRC]);
-
- if (tb[FRA_DST])
- rule4->dst = nla_get_u32(tb[FRA_DST]);
+ if (frh->src_len)
+ rule4->src = nla_get_be32(tb[FRA_SRC]);
-#ifdef CONFIG_IP_ROUTE_FWMARK
- if (tb[FRA_FWMARK]) {
- rule4->fwmark = nla_get_u32(tb[FRA_FWMARK]);
- if (rule4->fwmark)
- /* compatibility: if the mark value is non-zero all bits
- * are compared unless a mask is explicitly specified.
- */
- rule4->fwmask = 0xFFFFFFFF;
- }
-
- if (tb[FRA_FWMASK])
- rule4->fwmask = nla_get_u32(tb[FRA_FWMASK]);
-#endif
+ if (frh->dst_len)
+ rule4->dst = nla_get_be32(tb[FRA_DST]);
#ifdef CONFIG_NET_CLS_ROUTE
if (tb[FRA_FLOW])
if (frh->tos && (rule4->tos != frh->tos))
return 0;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- if (tb[FRA_FWMARK] && (rule4->fwmark != nla_get_u32(tb[FRA_FWMARK])))
- return 0;
-
- if (tb[FRA_FWMASK] && (rule4->fwmask != nla_get_u32(tb[FRA_FWMASK])))
- return 0;
-#endif
-
#ifdef CONFIG_NET_CLS_ROUTE
if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW])))
return 0;
#endif
- if (tb[FRA_SRC] && (rule4->src != nla_get_u32(tb[FRA_SRC])))
+ if (frh->src_len && (rule4->src != nla_get_be32(tb[FRA_SRC])))
return 0;
- if (tb[FRA_DST] && (rule4->dst != nla_get_u32(tb[FRA_DST])))
+ if (frh->dst_len && (rule4->dst != nla_get_be32(tb[FRA_DST])))
return 0;
return 1;
}
static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
- struct nlmsghdr *nlh, struct fib_rule_hdr *frh)
+ struct fib_rule_hdr *frh)
{
struct fib4_rule *rule4 = (struct fib4_rule *) rule;
frh->src_len = rule4->src_len;
frh->tos = rule4->tos;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- if (rule4->fwmark)
- NLA_PUT_U32(skb, FRA_FWMARK, rule4->fwmark);
-
- if (rule4->fwmask || rule4->fwmark)
- NLA_PUT_U32(skb, FRA_FWMASK, rule4->fwmask);
-#endif
-
if (rule4->dst_len)
- NLA_PUT_U32(skb, FRA_DST, rule4->dst);
+ NLA_PUT_BE32(skb, FRA_DST, rule4->dst);
if (rule4->src_len)
- NLA_PUT_U32(skb, FRA_SRC, rule4->src);
+ NLA_PUT_BE32(skb, FRA_SRC, rule4->src);
#ifdef CONFIG_NET_CLS_ROUTE
if (rule4->tclassid)
return -ENOBUFS;
}
-int fib4_rules_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- return fib_rules_dump(skb, cb, AF_INET);
-}
-
-static u32 fib4_rule_default_pref(void)
+static u32 fib4_rule_default_pref(struct fib_rules_ops *ops)
{
struct list_head *pos;
struct fib_rule *rule;
- if (!list_empty(&fib4_rules)) {
- pos = fib4_rules.next;
- if (pos->next != &fib4_rules) {
+ if (!list_empty(&ops->rules_list)) {
+ pos = ops->rules_list.next;
+ if (pos->next != &ops->rules_list) {
rule = list_entry(pos->next, struct fib_rule, list);
if (rule->pref)
return rule->pref - 1;
return 0;
}
-static struct fib_rules_ops fib4_rules_ops = {
+static size_t fib4_rule_nlmsg_payload(struct fib_rule *rule)
+{
+ return nla_total_size(4) /* dst */
+ + nla_total_size(4) /* src */
+ + nla_total_size(4); /* flow */
+}
+
+static void fib4_rule_flush_cache(struct fib_rules_ops *ops)
+{
+ rt_cache_flush(ops->fro_net, -1);
+}
+
+static struct fib_rules_ops fib4_rules_ops_template = {
.family = AF_INET,
.rule_size = sizeof(struct fib4_rule),
+ .addr_size = sizeof(u32),
.action = fib4_rule_action,
.match = fib4_rule_match,
.configure = fib4_rule_configure,
.compare = fib4_rule_compare,
.fill = fib4_rule_fill,
.default_pref = fib4_rule_default_pref,
+ .nlmsg_payload = fib4_rule_nlmsg_payload,
+ .flush_cache = fib4_rule_flush_cache,
.nlgroup = RTNLGRP_IPV4_RULE,
.policy = fib4_rule_policy,
- .rules_list = &fib4_rules,
.owner = THIS_MODULE,
};
-void __init fib4_rules_init(void)
+static int fib_default_rules_init(struct fib_rules_ops *ops)
{
- list_add_tail(&local_rule.common.list, &fib4_rules);
- list_add_tail(&main_rule.common.list, &fib4_rules);
- list_add_tail(&default_rule.common.list, &fib4_rules);
+ int err;
- fib_rules_register(&fib4_rules_ops);
+ err = fib_default_rule_add(ops, 0, RT_TABLE_LOCAL, 0);
+ if (err < 0)
+ return err;
+ err = fib_default_rule_add(ops, 0x7FFE, RT_TABLE_MAIN, 0);
+ if (err < 0)
+ return err;
+ err = fib_default_rule_add(ops, 0x7FFF, RT_TABLE_DEFAULT, 0);
+ if (err < 0)
+ return err;
+ return 0;
+}
+
+int __net_init fib4_rules_init(struct net *net)
+{
+ int err;
+ struct fib_rules_ops *ops;
+
+ ops = fib_rules_register(&fib4_rules_ops_template, net);
+ if (IS_ERR(ops))
+ return PTR_ERR(ops);
+
+ err = fib_default_rules_init(ops);
+ if (err < 0)
+ goto fail;
+ net->ipv4.rules_ops = ops;
+ return 0;
+
+fail:
+ /* also cleans all rules already added */
+ fib_rules_unregister(ops);
+ return err;
+}
+
+void __net_exit fib4_rules_exit(struct net *net)
+{
+ fib_rules_unregister(net->ipv4.rules_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff