*
* IPv4 Forwarding Information Base: policy rules.
*
- * Version: $Id: fib_rules.c,v 1.17 2001/10/31 21:55:54 davem Exp $
- *
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Thomas Graf <tgraf@suug.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Marc Boucher : routing by fwmark
*/
-#include <linux/config.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/socket.h>
-#include <linux/sockios.h>
-#include <linux/errno.h>
-#include <linux/in.h>
-#include <linux/inet.h>
-#include <linux/inetdevice.h>
#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/proc_fs.h>
-#include <linux/skbuff.h>
#include <linux/netlink.h>
+#include <linux/inetdevice.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rcupdate.h>
-
#include <net/ip.h>
-#include <net/protocol.h>
#include <net/route.h>
#include <net/tcp.h>
-#include <net/sock.h>
#include <net/ip_fib.h>
+#include <net/fib_rules.h>
-#define FRprintk(a...)
+static struct fib_rules_ops fib4_rules_ops;
-struct fib_rule
+struct fib4_rule
{
- struct hlist_node hlist;
- atomic_t r_clntref;
- u32 r_preference;
- unsigned char r_table;
- unsigned char r_action;
- unsigned char r_dst_len;
- unsigned char r_src_len;
- u32 r_src;
- u32 r_srcmask;
- u32 r_dst;
- u32 r_dstmask;
- u32 r_srcmap;
- u8 r_flags;
- u8 r_tos;
+ struct fib_rule common;
+ u8 dst_len;
+ u8 src_len;
+ u8 tos;
+ u32 src;
+ u32 srcmask;
+ u32 dst;
+ u32 dstmask;
#ifdef CONFIG_IP_ROUTE_FWMARK
- u32 r_fwmark;
+ u32 fwmark;
+ u32 fwmask;
#endif
- int r_ifindex;
#ifdef CONFIG_NET_CLS_ROUTE
- __u32 r_tclassid;
+ u32 tclassid;
#endif
- char r_ifname[IFNAMSIZ];
- int r_dead;
- struct rcu_head rcu;
};
-static struct fib_rule default_rule = {
- .r_clntref = ATOMIC_INIT(2),
- .r_preference = 0x7FFF,
- .r_table = RT_TABLE_DEFAULT,
- .r_action = RTN_UNICAST,
+static struct fib4_rule default_rule = {
+ .common = {
+ .refcnt = ATOMIC_INIT(2),
+ .pref = 0x7FFF,
+ .table = RT_TABLE_DEFAULT,
+ .action = FR_ACT_TO_TBL,
+ },
};
-static struct fib_rule main_rule = {
- .r_clntref = ATOMIC_INIT(2),
- .r_preference = 0x7FFE,
- .r_table = RT_TABLE_MAIN,
- .r_action = RTN_UNICAST,
+static struct fib4_rule main_rule = {
+ .common = {
+ .refcnt = ATOMIC_INIT(2),
+ .pref = 0x7FFE,
+ .table = RT_TABLE_MAIN,
+ .action = FR_ACT_TO_TBL,
+ },
};
-static struct fib_rule local_rule = {
- .r_clntref = ATOMIC_INIT(2),
- .r_table = RT_TABLE_LOCAL,
- .r_action = RTN_UNICAST,
+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 struct hlist_head fib_rules;
+static LIST_HEAD(fib4_rules);
-/* writer func called from netlink -- rtnl_sem hold*/
-
-int inet_rtm_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+#ifdef CONFIG_NET_CLS_ROUTE
+u32 fib_rules_tclass(struct fib_result *res)
{
- struct rtattr **rta = arg;
- struct rtmsg *rtm = NLMSG_DATA(nlh);
- struct fib_rule *r;
- struct hlist_node *node;
- int err = -ESRCH;
-
- hlist_for_each_entry(r, node, &fib_rules, hlist) {
- if ((!rta[RTA_SRC-1] || memcmp(RTA_DATA(rta[RTA_SRC-1]), &r->r_src, 4) == 0) &&
- rtm->rtm_src_len == r->r_src_len &&
- rtm->rtm_dst_len == r->r_dst_len &&
- (!rta[RTA_DST-1] || memcmp(RTA_DATA(rta[RTA_DST-1]), &r->r_dst, 4) == 0) &&
- rtm->rtm_tos == r->r_tos &&
-#ifdef CONFIG_IP_ROUTE_FWMARK
- (!rta[RTA_PROTOINFO-1] || memcmp(RTA_DATA(rta[RTA_PROTOINFO-1]), &r->r_fwmark, 4) == 0) &&
-#endif
- (!rtm->rtm_type || rtm->rtm_type == r->r_action) &&
- (!rta[RTA_PRIORITY-1] || memcmp(RTA_DATA(rta[RTA_PRIORITY-1]), &r->r_preference, 4) == 0) &&
- (!rta[RTA_IIF-1] || rtattr_strcmp(rta[RTA_IIF-1], r->r_ifname) == 0) &&
- (!rtm->rtm_table || (r && rtm->rtm_table == r->r_table))) {
- err = -EPERM;
- if (r == &local_rule)
- break;
-
- hlist_del_rcu(&r->hlist);
- r->r_dead = 1;
- fib_rule_put(r);
- err = 0;
- break;
- }
- }
- return err;
+ return res->r ? ((struct fib4_rule *) res->r)->tclassid : 0;
}
+#endif
-/* Allocate new unique table id */
-
-static struct fib_table *fib_empty_table(void)
+int fib_lookup(struct flowi *flp, struct fib_result *res)
{
- int id;
+ struct fib_lookup_arg arg = {
+ .result = res,
+ };
+ int err;
- for (id = 1; id <= RT_TABLE_MAX; id++)
- if (fib_tables[id] == NULL)
- return __fib_new_table(id);
- return NULL;
-}
+ err = fib_rules_lookup(&fib4_rules_ops, flp, 0, &arg);
+ res->r = arg.rule;
-static inline void fib_rule_put_rcu(struct rcu_head *head)
-{
- struct fib_rule *r = container_of(head, struct fib_rule, rcu);
- kfree(r);
+ return err;
}
-void fib_rule_put(struct fib_rule *r)
+static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
+ int flags, struct fib_lookup_arg *arg)
{
- if (atomic_dec_and_test(&r->r_clntref)) {
- if (r->r_dead)
- call_rcu(&r->rcu, fib_rule_put_rcu);
- else
- printk("Freeing alive rule %p\n", r);
+ int err = -EAGAIN;
+ struct fib_table *tbl;
+
+ switch (rule->action) {
+ case FR_ACT_TO_TBL:
+ break;
+
+ case FR_ACT_UNREACHABLE:
+ err = -ENETUNREACH;
+ goto errout;
+
+ case FR_ACT_PROHIBIT:
+ err = -EACCES;
+ goto errout;
+
+ case FR_ACT_BLACKHOLE:
+ default:
+ err = -EINVAL;
+ goto errout;
}
+
+ if ((tbl = fib_get_table(rule->table)) == NULL)
+ goto errout;
+
+ err = tbl->tb_lookup(tbl, flp, (struct fib_result *) arg->result);
+ if (err > 0)
+ err = -EAGAIN;
+errout:
+ return err;
}
-/* writer func called from netlink -- rtnl_sem hold*/
-int inet_rtm_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+void fib_select_default(const struct flowi *flp, struct fib_result *res)
{
- struct rtattr **rta = arg;
- struct rtmsg *rtm = NLMSG_DATA(nlh);
- struct fib_rule *r, *new_r, *last = NULL;
- struct hlist_node *node = NULL;
- unsigned char table_id;
-
- if (rtm->rtm_src_len > 32 || rtm->rtm_dst_len > 32 ||
- (rtm->rtm_tos & ~IPTOS_TOS_MASK))
- return -EINVAL;
-
- if (rta[RTA_IIF-1] && RTA_PAYLOAD(rta[RTA_IIF-1]) > IFNAMSIZ)
- return -EINVAL;
-
- table_id = rtm->rtm_table;
- if (table_id == RT_TABLE_UNSPEC) {
- struct fib_table *table;
- if (rtm->rtm_type == RTN_UNICAST) {
- if ((table = fib_empty_table()) == NULL)
- return -ENOBUFS;
- table_id = table->tb_id;
- }
+ 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);
}
+}
- new_r = kmalloc(sizeof(*new_r), GFP_KERNEL);
- if (!new_r)
- return -ENOMEM;
- memset(new_r, 0, sizeof(*new_r));
-
- if (rta[RTA_SRC-1])
- memcpy(&new_r->r_src, RTA_DATA(rta[RTA_SRC-1]), 4);
- if (rta[RTA_DST-1])
- memcpy(&new_r->r_dst, RTA_DATA(rta[RTA_DST-1]), 4);
- if (rta[RTA_GATEWAY-1])
- memcpy(&new_r->r_srcmap, RTA_DATA(rta[RTA_GATEWAY-1]), 4);
- new_r->r_src_len = rtm->rtm_src_len;
- new_r->r_dst_len = rtm->rtm_dst_len;
- new_r->r_srcmask = inet_make_mask(rtm->rtm_src_len);
- new_r->r_dstmask = inet_make_mask(rtm->rtm_dst_len);
- new_r->r_tos = rtm->rtm_tos;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- if (rta[RTA_PROTOINFO-1])
- memcpy(&new_r->r_fwmark, RTA_DATA(rta[RTA_PROTOINFO-1]), 4);
-#endif
- new_r->r_action = rtm->rtm_type;
- new_r->r_flags = rtm->rtm_flags;
- if (rta[RTA_PRIORITY-1])
- memcpy(&new_r->r_preference, RTA_DATA(rta[RTA_PRIORITY-1]), 4);
- new_r->r_table = table_id;
- if (rta[RTA_IIF-1]) {
- struct net_device *dev;
- rtattr_strlcpy(new_r->r_ifname, rta[RTA_IIF-1], IFNAMSIZ);
- new_r->r_ifindex = -1;
- dev = __dev_get_by_name(new_r->r_ifname);
- if (dev)
- new_r->r_ifindex = dev->ifindex;
- }
-#ifdef CONFIG_NET_CLS_ROUTE
- if (rta[RTA_FLOW-1])
- memcpy(&new_r->r_tclassid, RTA_DATA(rta[RTA_FLOW-1]), 4);
-#endif
- r = container_of(fib_rules.first, struct fib_rule, hlist);
+static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
+{
+ struct fib4_rule *r = (struct fib4_rule *) rule;
+ u32 daddr = fl->fl4_dst;
+ u32 saddr = fl->fl4_src;
- if (!new_r->r_preference) {
- if (r && r->hlist.next != NULL) {
- r = container_of(r->hlist.next, struct fib_rule, hlist);
- if (r->r_preference)
- new_r->r_preference = r->r_preference - 1;
- }
- }
+ if (((saddr ^ r->src) & r->srcmask) ||
+ ((daddr ^ r->dst) & r->dstmask))
+ return 0;
- hlist_for_each_entry(r, node, &fib_rules, hlist) {
- if (r->r_preference > new_r->r_preference)
- break;
- last = r;
- }
- atomic_inc(&new_r->r_clntref);
+ if (r->tos && (r->tos != fl->fl4_tos))
+ return 0;
- if (last)
- hlist_add_after_rcu(&last->hlist, &new_r->hlist);
- else
- hlist_add_before_rcu(&new_r->hlist, &r->hlist);
+#ifdef CONFIG_IP_ROUTE_FWMARK
+ if ((r->fwmark ^ fl->fl4_fwmark) & r->fwmask)
+ return 0;
+#endif
- return 0;
+ return 1;
}
-#ifdef CONFIG_NET_CLS_ROUTE
-u32 fib_rules_tclass(struct fib_result *res)
+static struct fib_table *fib_empty_table(void)
{
- if (res->r)
- return res->r->r_tclassid;
- return 0;
+ u32 id;
+
+ for (id = 1; id <= RT_TABLE_MAX; id++)
+ if (fib_get_table(id) == NULL)
+ return fib_new_table(id);
+ return NULL;
}
-#endif
-/* callers should hold rtnl semaphore */
+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 },
+ [FRA_FLOW] = { .type = NLA_U32 },
+ [FRA_TABLE] = { .type = NLA_U32 },
+};
-static void fib_rules_detach(struct net_device *dev)
+static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct fib_rule_hdr *frh,
+ struct nlattr **tb)
{
- struct hlist_node *node;
- struct fib_rule *r;
+ int err = -EINVAL;
+ struct fib4_rule *rule4 = (struct fib4_rule *) rule;
- hlist_for_each_entry(r, node, &fib_rules, hlist) {
- if (r->r_ifindex == dev->ifindex)
- r->r_ifindex = -1;
+ if (frh->src_len > 32 || frh->dst_len > 32 ||
+ (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();
+ if (table == NULL) {
+ err = -ENOBUFS;
+ goto errout;
+ }
+
+ rule->table = table->tb_id;
+ }
}
-}
-/* callers should hold rtnl semaphore */
+ if (tb[FRA_SRC])
+ rule4->src = nla_get_u32(tb[FRA_SRC]);
-static void fib_rules_attach(struct net_device *dev)
-{
- struct hlist_node *node;
- struct fib_rule *r;
+ if (tb[FRA_DST])
+ rule4->dst = nla_get_u32(tb[FRA_DST]);
- hlist_for_each_entry(r, node, &fib_rules, hlist) {
- if (r->r_ifindex == -1 && strcmp(dev->name, r->r_ifname) == 0)
- r->r_ifindex = dev->ifindex;
+#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
+
+#ifdef CONFIG_NET_CLS_ROUTE
+ if (tb[FRA_FLOW])
+ rule4->tclassid = nla_get_u32(tb[FRA_FLOW]);
+#endif
+
+ rule4->src_len = frh->src_len;
+ rule4->srcmask = inet_make_mask(rule4->src_len);
+ rule4->dst_len = frh->dst_len;
+ rule4->dstmask = inet_make_mask(rule4->dst_len);
+ rule4->tos = frh->tos;
+
+ err = 0;
+errout:
+ return err;
}
-int fib_lookup(const struct flowi *flp, struct fib_result *res)
+static int fib4_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
+ struct nlattr **tb)
{
- int err;
- struct fib_rule *r, *policy;
- struct fib_table *tb;
- struct hlist_node *node;
+ struct fib4_rule *rule4 = (struct fib4_rule *) rule;
- u32 daddr = flp->fl4_dst;
- u32 saddr = flp->fl4_src;
+ if (frh->src_len && (rule4->src_len != frh->src_len))
+ return 0;
-FRprintk("Lookup: %u.%u.%u.%u <- %u.%u.%u.%u ",
- NIPQUAD(flp->fl4_dst), NIPQUAD(flp->fl4_src));
+ if (frh->dst_len && (rule4->dst_len != frh->dst_len))
+ return 0;
- rcu_read_lock();
+ if (frh->tos && (rule4->tos != frh->tos))
+ return 0;
- hlist_for_each_entry_rcu(r, node, &fib_rules, hlist) {
- if (((saddr^r->r_src) & r->r_srcmask) ||
- ((daddr^r->r_dst) & r->r_dstmask) ||
- (r->r_tos && r->r_tos != flp->fl4_tos) ||
#ifdef CONFIG_IP_ROUTE_FWMARK
- (r->r_fwmark && r->r_fwmark != flp->fl4_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
- (r->r_ifindex && r->r_ifindex != flp->iif))
- continue;
-
-FRprintk("tb %d r %d ", r->r_table, r->r_action);
- switch (r->r_action) {
- case RTN_UNICAST:
- policy = r;
- break;
- case RTN_UNREACHABLE:
- rcu_read_unlock();
- return -ENETUNREACH;
- default:
- case RTN_BLACKHOLE:
- rcu_read_unlock();
- return -EINVAL;
- case RTN_PROHIBIT:
- rcu_read_unlock();
- return -EACCES;
- }
- if ((tb = fib_get_table(r->r_table)) == NULL)
- continue;
- err = tb->tb_lookup(tb, flp, res);
- if (err == 0) {
- res->r = policy;
- if (policy)
- atomic_inc(&policy->r_clntref);
- rcu_read_unlock();
- return 0;
- }
- if (err < 0 && err != -EAGAIN) {
- rcu_read_unlock();
- return err;
- }
- }
-FRprintk("FAILURE\n");
- rcu_read_unlock();
- return -ENETUNREACH;
-}
+#ifdef CONFIG_NET_CLS_ROUTE
+ if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW])))
+ return 0;
+#endif
-void fib_select_default(const struct flowi *flp, struct fib_result *res)
-{
- if (res->r && res->r->r_action == RTN_UNICAST &&
- FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) {
- struct fib_table *tb;
- if ((tb = fib_get_table(res->r->r_table)) != NULL)
- tb->tb_select_default(tb, flp, res);
- }
-}
+ if (tb[FRA_SRC] && (rule4->src != nla_get_u32(tb[FRA_SRC])))
+ return 0;
-static int fib_rules_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
- struct net_device *dev = ptr;
+ if (tb[FRA_DST] && (rule4->dst != nla_get_u32(tb[FRA_DST])))
+ return 0;
- if (event == NETDEV_UNREGISTER)
- fib_rules_detach(dev);
- else if (event == NETDEV_REGISTER)
- fib_rules_attach(dev);
- return NOTIFY_DONE;
+ return 1;
}
+static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct fib_rule_hdr *frh)
+{
+ struct fib4_rule *rule4 = (struct fib4_rule *) rule;
-static struct notifier_block fib_rules_notifier = {
- .notifier_call =fib_rules_event,
-};
+ frh->family = AF_INET;
+ frh->dst_len = rule4->dst_len;
+ frh->src_len = rule4->src_len;
+ frh->tos = rule4->tos;
-static __inline__ int inet_fill_rule(struct sk_buff *skb,
- struct fib_rule *r,
- struct netlink_callback *cb,
- unsigned int flags)
-{
- struct rtmsg *rtm;
- struct nlmsghdr *nlh;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWRULE, sizeof(*rtm), flags);
- rtm = NLMSG_DATA(nlh);
- rtm->rtm_family = AF_INET;
- rtm->rtm_dst_len = r->r_dst_len;
- rtm->rtm_src_len = r->r_src_len;
- rtm->rtm_tos = r->r_tos;
#ifdef CONFIG_IP_ROUTE_FWMARK
- if (r->r_fwmark)
- RTA_PUT(skb, RTA_PROTOINFO, 4, &r->r_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
- rtm->rtm_table = r->r_table;
- rtm->rtm_protocol = 0;
- rtm->rtm_scope = 0;
- rtm->rtm_type = r->r_action;
- rtm->rtm_flags = r->r_flags;
-
- if (r->r_dst_len)
- RTA_PUT(skb, RTA_DST, 4, &r->r_dst);
- if (r->r_src_len)
- RTA_PUT(skb, RTA_SRC, 4, &r->r_src);
- if (r->r_ifname[0])
- RTA_PUT(skb, RTA_IIF, IFNAMSIZ, &r->r_ifname);
- if (r->r_preference)
- RTA_PUT(skb, RTA_PRIORITY, 4, &r->r_preference);
- if (r->r_srcmap)
- RTA_PUT(skb, RTA_GATEWAY, 4, &r->r_srcmap);
+
+ if (rule4->dst_len)
+ NLA_PUT_U32(skb, FRA_DST, rule4->dst);
+
+ if (rule4->src_len)
+ NLA_PUT_U32(skb, FRA_SRC, rule4->src);
+
#ifdef CONFIG_NET_CLS_ROUTE
- if (r->r_tclassid)
- RTA_PUT(skb, RTA_FLOW, 4, &r->r_tclassid);
+ if (rule4->tclassid)
+ NLA_PUT_U32(skb, FRA_FLOW, rule4->tclassid);
#endif
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
+ return 0;
-nlmsg_failure:
-rtattr_failure:
- skb_trim(skb, b - skb->data);
- return -1;
+nla_put_failure:
+ return -ENOBUFS;
}
-/* callers should hold rtnl semaphore */
+int fib4_rules_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ return fib_rules_dump(skb, cb, AF_INET);
+}
-int inet_dump_rules(struct sk_buff *skb, struct netlink_callback *cb)
+static u32 fib4_rule_default_pref(void)
{
- int idx = 0;
- int s_idx = cb->args[0];
- struct fib_rule *r;
- struct hlist_node *node;
-
- rcu_read_lock();
- hlist_for_each_entry(r, node, &fib_rules, hlist) {
-
- if (idx < s_idx)
- continue;
- if (inet_fill_rule(skb, r, cb, NLM_F_MULTI) < 0)
- break;
- idx++;
+ struct list_head *pos;
+ struct fib_rule *rule;
+
+ if (!list_empty(&fib4_rules)) {
+ pos = fib4_rules.next;
+ if (pos->next != &fib4_rules) {
+ rule = list_entry(pos->next, struct fib_rule, list);
+ if (rule->pref)
+ return rule->pref - 1;
+ }
}
- rcu_read_unlock();
- cb->args[0] = idx;
- return skb->len;
+ return 0;
}
-void __init fib_rules_init(void)
+static struct fib_rules_ops fib4_rules_ops = {
+ .family = AF_INET,
+ .rule_size = sizeof(struct fib4_rule),
+ .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,
+ .nlgroup = RTNLGRP_IPV4_RULE,
+ .policy = fib4_rule_policy,
+ .rules_list = &fib4_rules,
+ .owner = THIS_MODULE,
+};
+
+void __init fib4_rules_init(void)
{
- INIT_HLIST_HEAD(&fib_rules);
- hlist_add_head(&local_rule.hlist, &fib_rules);
- hlist_add_after(&local_rule.hlist, &main_rule.hlist);
- hlist_add_after(&main_rule.hlist, &default_rule.hlist);
- register_netdevice_notifier(&fib_rules_notifier);
+ 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);
+
+ fib_rules_register(&fib4_rules_ops);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff