![Panagiotis Issaris](/assets/img/avatar_default.png)
Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
802 lines
20 KiB
C
802 lines
20 KiB
C
/*
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* DECnet An implementation of the DECnet protocol suite for the LINUX
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* operating system. DECnet is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* DECnet Routing Forwarding Information Base (Glue/Info List)
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*
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* Author: Steve Whitehouse <SteveW@ACM.org>
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*
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*
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* Changes:
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* Alexey Kuznetsov : SMP locking changes
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* Steve Whitehouse : Rewrote it... Well to be more correct, I
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* copied most of it from the ipv4 fib code.
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* Steve Whitehouse : Updated it in style and fixed a few bugs
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* which were fixed in the ipv4 code since
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* this code was copied from it.
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*
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*/
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#include <linux/string.h>
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#include <linux/net.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/proc_fs.h>
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#include <linux/netdevice.h>
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#include <linux/timer.h>
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#include <linux/spinlock.h>
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#include <asm/atomic.h>
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#include <asm/uaccess.h>
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#include <net/neighbour.h>
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#include <net/dst.h>
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#include <net/flow.h>
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#include <net/dn.h>
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#include <net/dn_route.h>
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#include <net/dn_fib.h>
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#include <net/dn_neigh.h>
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#include <net/dn_dev.h>
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#define RT_MIN_TABLE 1
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#define for_fib_info() { struct dn_fib_info *fi;\
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for(fi = dn_fib_info_list; fi; fi = fi->fib_next)
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#define endfor_fib_info() }
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#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
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for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
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#define change_nexthops(fi) { int nhsel; struct dn_fib_nh *nh;\
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for(nhsel = 0, nh = (struct dn_fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
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#define endfor_nexthops(fi) }
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extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
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static DEFINE_SPINLOCK(dn_fib_multipath_lock);
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static struct dn_fib_info *dn_fib_info_list;
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static DEFINE_RWLOCK(dn_fib_info_lock);
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static struct
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{
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int error;
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u8 scope;
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} dn_fib_props[RTA_MAX+1] = {
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[RTN_UNSPEC] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
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[RTN_UNICAST] = { .error = 0, .scope = RT_SCOPE_UNIVERSE },
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[RTN_LOCAL] = { .error = 0, .scope = RT_SCOPE_HOST },
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[RTN_BROADCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_ANYCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_MULTICAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_BLACKHOLE] = { .error = -EINVAL, .scope = RT_SCOPE_UNIVERSE },
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[RTN_UNREACHABLE] = { .error = -EHOSTUNREACH, .scope = RT_SCOPE_UNIVERSE },
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[RTN_PROHIBIT] = { .error = -EACCES, .scope = RT_SCOPE_UNIVERSE },
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[RTN_THROW] = { .error = -EAGAIN, .scope = RT_SCOPE_UNIVERSE },
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[RTN_NAT] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
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[RTN_XRESOLVE] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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};
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void dn_fib_free_info(struct dn_fib_info *fi)
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{
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if (fi->fib_dead == 0) {
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printk(KERN_DEBUG "DECnet: BUG! Attempt to free alive dn_fib_info\n");
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return;
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}
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change_nexthops(fi) {
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if (nh->nh_dev)
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dev_put(nh->nh_dev);
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nh->nh_dev = NULL;
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} endfor_nexthops(fi);
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kfree(fi);
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}
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void dn_fib_release_info(struct dn_fib_info *fi)
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{
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write_lock(&dn_fib_info_lock);
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if (fi && --fi->fib_treeref == 0) {
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if (fi->fib_next)
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fi->fib_next->fib_prev = fi->fib_prev;
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if (fi->fib_prev)
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fi->fib_prev->fib_next = fi->fib_next;
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if (fi == dn_fib_info_list)
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dn_fib_info_list = fi->fib_next;
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fi->fib_dead = 1;
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dn_fib_info_put(fi);
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}
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write_unlock(&dn_fib_info_lock);
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}
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static inline int dn_fib_nh_comp(const struct dn_fib_info *fi, const struct dn_fib_info *ofi)
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{
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const struct dn_fib_nh *onh = ofi->fib_nh;
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for_nexthops(fi) {
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if (nh->nh_oif != onh->nh_oif ||
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nh->nh_gw != onh->nh_gw ||
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nh->nh_scope != onh->nh_scope ||
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nh->nh_weight != onh->nh_weight ||
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((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
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return -1;
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onh++;
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} endfor_nexthops(fi);
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return 0;
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}
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static inline struct dn_fib_info *dn_fib_find_info(const struct dn_fib_info *nfi)
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{
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for_fib_info() {
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if (fi->fib_nhs != nfi->fib_nhs)
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continue;
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if (nfi->fib_protocol == fi->fib_protocol &&
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nfi->fib_prefsrc == fi->fib_prefsrc &&
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nfi->fib_priority == fi->fib_priority &&
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memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 &&
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((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
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(nfi->fib_nhs == 0 || dn_fib_nh_comp(fi, nfi) == 0))
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return fi;
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} endfor_fib_info();
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return NULL;
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}
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__le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type)
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{
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while(RTA_OK(attr,attrlen)) {
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if (attr->rta_type == type)
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return *(__le16*)RTA_DATA(attr);
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attr = RTA_NEXT(attr, attrlen);
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}
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return 0;
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}
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static int dn_fib_count_nhs(struct rtattr *rta)
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{
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int nhs = 0;
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struct rtnexthop *nhp = RTA_DATA(rta);
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int nhlen = RTA_PAYLOAD(rta);
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while(nhlen >= (int)sizeof(struct rtnexthop)) {
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if ((nhlen -= nhp->rtnh_len) < 0)
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return 0;
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nhs++;
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nhp = RTNH_NEXT(nhp);
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}
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return nhs;
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}
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static int dn_fib_get_nhs(struct dn_fib_info *fi, const struct rtattr *rta, const struct rtmsg *r)
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{
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struct rtnexthop *nhp = RTA_DATA(rta);
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int nhlen = RTA_PAYLOAD(rta);
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change_nexthops(fi) {
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int attrlen = nhlen - sizeof(struct rtnexthop);
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if (attrlen < 0 || (nhlen -= nhp->rtnh_len) < 0)
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return -EINVAL;
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nh->nh_flags = (r->rtm_flags&~0xFF) | nhp->rtnh_flags;
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nh->nh_oif = nhp->rtnh_ifindex;
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nh->nh_weight = nhp->rtnh_hops + 1;
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if (attrlen) {
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nh->nh_gw = dn_fib_get_attr16(RTNH_DATA(nhp), attrlen, RTA_GATEWAY);
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}
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nhp = RTNH_NEXT(nhp);
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} endfor_nexthops(fi);
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return 0;
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}
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static int dn_fib_check_nh(const struct rtmsg *r, struct dn_fib_info *fi, struct dn_fib_nh *nh)
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{
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int err;
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if (nh->nh_gw) {
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struct flowi fl;
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struct dn_fib_res res;
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memset(&fl, 0, sizeof(fl));
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if (nh->nh_flags&RTNH_F_ONLINK) {
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struct net_device *dev;
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if (r->rtm_scope >= RT_SCOPE_LINK)
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return -EINVAL;
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if (dnet_addr_type(nh->nh_gw) != RTN_UNICAST)
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return -EINVAL;
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if ((dev = __dev_get_by_index(nh->nh_oif)) == NULL)
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return -ENODEV;
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if (!(dev->flags&IFF_UP))
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return -ENETDOWN;
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nh->nh_dev = dev;
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dev_hold(dev);
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nh->nh_scope = RT_SCOPE_LINK;
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return 0;
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}
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memset(&fl, 0, sizeof(fl));
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fl.fld_dst = nh->nh_gw;
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fl.oif = nh->nh_oif;
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fl.fld_scope = r->rtm_scope + 1;
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if (fl.fld_scope < RT_SCOPE_LINK)
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fl.fld_scope = RT_SCOPE_LINK;
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if ((err = dn_fib_lookup(&fl, &res)) != 0)
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return err;
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err = -EINVAL;
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if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
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goto out;
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nh->nh_scope = res.scope;
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nh->nh_oif = DN_FIB_RES_OIF(res);
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nh->nh_dev = DN_FIB_RES_DEV(res);
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if (nh->nh_dev == NULL)
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goto out;
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dev_hold(nh->nh_dev);
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err = -ENETDOWN;
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if (!(nh->nh_dev->flags & IFF_UP))
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goto out;
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err = 0;
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out:
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dn_fib_res_put(&res);
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return err;
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} else {
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struct net_device *dev;
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if (nh->nh_flags&(RTNH_F_PERVASIVE|RTNH_F_ONLINK))
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return -EINVAL;
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dev = __dev_get_by_index(nh->nh_oif);
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if (dev == NULL || dev->dn_ptr == NULL)
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return -ENODEV;
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if (!(dev->flags&IFF_UP))
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return -ENETDOWN;
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nh->nh_dev = dev;
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dev_hold(nh->nh_dev);
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nh->nh_scope = RT_SCOPE_HOST;
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}
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return 0;
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}
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struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, struct dn_kern_rta *rta, const struct nlmsghdr *nlh, int *errp)
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{
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int err;
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struct dn_fib_info *fi = NULL;
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struct dn_fib_info *ofi;
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int nhs = 1;
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if (dn_fib_props[r->rtm_type].scope > r->rtm_scope)
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goto err_inval;
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if (rta->rta_mp) {
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nhs = dn_fib_count_nhs(rta->rta_mp);
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if (nhs == 0)
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goto err_inval;
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}
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fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct dn_fib_nh), GFP_KERNEL);
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err = -ENOBUFS;
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if (fi == NULL)
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goto failure;
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fi->fib_protocol = r->rtm_protocol;
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fi->fib_nhs = nhs;
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fi->fib_flags = r->rtm_flags;
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if (rta->rta_priority)
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fi->fib_priority = *rta->rta_priority;
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if (rta->rta_mx) {
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int attrlen = RTA_PAYLOAD(rta->rta_mx);
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struct rtattr *attr = RTA_DATA(rta->rta_mx);
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while(RTA_OK(attr, attrlen)) {
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unsigned flavour = attr->rta_type;
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if (flavour) {
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if (flavour > RTAX_MAX)
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goto err_inval;
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fi->fib_metrics[flavour-1] = *(unsigned*)RTA_DATA(attr);
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}
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attr = RTA_NEXT(attr, attrlen);
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}
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}
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if (rta->rta_prefsrc)
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memcpy(&fi->fib_prefsrc, rta->rta_prefsrc, 2);
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if (rta->rta_mp) {
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if ((err = dn_fib_get_nhs(fi, rta->rta_mp, r)) != 0)
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goto failure;
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if (rta->rta_oif && fi->fib_nh->nh_oif != *rta->rta_oif)
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goto err_inval;
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if (rta->rta_gw && memcmp(&fi->fib_nh->nh_gw, rta->rta_gw, 2))
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goto err_inval;
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} else {
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struct dn_fib_nh *nh = fi->fib_nh;
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if (rta->rta_oif)
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nh->nh_oif = *rta->rta_oif;
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if (rta->rta_gw)
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memcpy(&nh->nh_gw, rta->rta_gw, 2);
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nh->nh_flags = r->rtm_flags;
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nh->nh_weight = 1;
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}
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if (r->rtm_type == RTN_NAT) {
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if (rta->rta_gw == NULL || nhs != 1 || rta->rta_oif)
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goto err_inval;
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memcpy(&fi->fib_nh->nh_gw, rta->rta_gw, 2);
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goto link_it;
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}
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if (dn_fib_props[r->rtm_type].error) {
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if (rta->rta_gw || rta->rta_oif || rta->rta_mp)
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goto err_inval;
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goto link_it;
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}
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if (r->rtm_scope > RT_SCOPE_HOST)
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goto err_inval;
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if (r->rtm_scope == RT_SCOPE_HOST) {
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struct dn_fib_nh *nh = fi->fib_nh;
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/* Local address is added */
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if (nhs != 1 || nh->nh_gw)
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goto err_inval;
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nh->nh_scope = RT_SCOPE_NOWHERE;
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nh->nh_dev = dev_get_by_index(fi->fib_nh->nh_oif);
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err = -ENODEV;
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if (nh->nh_dev == NULL)
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goto failure;
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} else {
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change_nexthops(fi) {
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if ((err = dn_fib_check_nh(r, fi, nh)) != 0)
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goto failure;
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} endfor_nexthops(fi)
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}
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if (fi->fib_prefsrc) {
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if (r->rtm_type != RTN_LOCAL || rta->rta_dst == NULL ||
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memcmp(&fi->fib_prefsrc, rta->rta_dst, 2))
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if (dnet_addr_type(fi->fib_prefsrc) != RTN_LOCAL)
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goto err_inval;
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}
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link_it:
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if ((ofi = dn_fib_find_info(fi)) != NULL) {
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fi->fib_dead = 1;
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dn_fib_free_info(fi);
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ofi->fib_treeref++;
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return ofi;
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}
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fi->fib_treeref++;
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atomic_inc(&fi->fib_clntref);
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write_lock(&dn_fib_info_lock);
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fi->fib_next = dn_fib_info_list;
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fi->fib_prev = NULL;
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if (dn_fib_info_list)
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dn_fib_info_list->fib_prev = fi;
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dn_fib_info_list = fi;
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write_unlock(&dn_fib_info_lock);
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return fi;
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err_inval:
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err = -EINVAL;
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failure:
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*errp = err;
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if (fi) {
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fi->fib_dead = 1;
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dn_fib_free_info(fi);
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}
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return NULL;
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}
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int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowi *fl, struct dn_fib_res *res)
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{
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int err = dn_fib_props[type].error;
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if (err == 0) {
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if (fi->fib_flags & RTNH_F_DEAD)
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return 1;
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res->fi = fi;
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switch(type) {
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case RTN_NAT:
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DN_FIB_RES_RESET(*res);
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atomic_inc(&fi->fib_clntref);
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return 0;
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case RTN_UNICAST:
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case RTN_LOCAL:
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for_nexthops(fi) {
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if (nh->nh_flags & RTNH_F_DEAD)
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continue;
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if (!fl->oif || fl->oif == nh->nh_oif)
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break;
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}
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if (nhsel < fi->fib_nhs) {
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res->nh_sel = nhsel;
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atomic_inc(&fi->fib_clntref);
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return 0;
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}
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endfor_nexthops(fi);
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res->fi = NULL;
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return 1;
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default:
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if (net_ratelimit())
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printk("DECnet: impossible routing event : dn_fib_semantic_match type=%d\n", type);
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res->fi = NULL;
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return -EINVAL;
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}
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}
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return err;
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}
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void dn_fib_select_multipath(const struct flowi *fl, struct dn_fib_res *res)
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{
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struct dn_fib_info *fi = res->fi;
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int w;
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spin_lock_bh(&dn_fib_multipath_lock);
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if (fi->fib_power <= 0) {
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int power = 0;
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change_nexthops(fi) {
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if (!(nh->nh_flags&RTNH_F_DEAD)) {
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power += nh->nh_weight;
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nh->nh_power = nh->nh_weight;
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}
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} endfor_nexthops(fi);
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fi->fib_power = power;
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if (power < 0) {
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spin_unlock_bh(&dn_fib_multipath_lock);
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res->nh_sel = 0;
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return;
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}
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}
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w = jiffies % fi->fib_power;
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change_nexthops(fi) {
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if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) {
|
|
if ((w -= nh->nh_power) <= 0) {
|
|
nh->nh_power--;
|
|
fi->fib_power--;
|
|
res->nh_sel = nhsel;
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
return;
|
|
}
|
|
}
|
|
} endfor_nexthops(fi);
|
|
res->nh_sel = 0;
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
}
|
|
|
|
|
|
static int dn_fib_check_attr(struct rtmsg *r, struct rtattr **rta)
|
|
{
|
|
int i;
|
|
|
|
for(i = 1; i <= RTA_MAX; i++) {
|
|
struct rtattr *attr = rta[i-1];
|
|
if (attr) {
|
|
if (RTA_PAYLOAD(attr) < 4 && RTA_PAYLOAD(attr) != 2)
|
|
return -EINVAL;
|
|
if (i != RTA_MULTIPATH && i != RTA_METRICS)
|
|
rta[i-1] = (struct rtattr *)RTA_DATA(attr);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct dn_fib_table *tb;
|
|
struct rtattr **rta = arg;
|
|
struct rtmsg *r = NLMSG_DATA(nlh);
|
|
|
|
if (dn_fib_check_attr(r, rta))
|
|
return -EINVAL;
|
|
|
|
tb = dn_fib_get_table(r->rtm_table, 0);
|
|
if (tb)
|
|
return tb->delete(tb, r, (struct dn_kern_rta *)rta, nlh, &NETLINK_CB(skb));
|
|
|
|
return -ESRCH;
|
|
}
|
|
|
|
int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
struct dn_fib_table *tb;
|
|
struct rtattr **rta = arg;
|
|
struct rtmsg *r = NLMSG_DATA(nlh);
|
|
|
|
if (dn_fib_check_attr(r, rta))
|
|
return -EINVAL;
|
|
|
|
tb = dn_fib_get_table(r->rtm_table, 1);
|
|
if (tb)
|
|
return tb->insert(tb, r, (struct dn_kern_rta *)rta, nlh, &NETLINK_CB(skb));
|
|
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
|
|
int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
int t;
|
|
int s_t;
|
|
struct dn_fib_table *tb;
|
|
|
|
if (NLMSG_PAYLOAD(cb->nlh, 0) >= sizeof(struct rtmsg) &&
|
|
((struct rtmsg *)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED)
|
|
return dn_cache_dump(skb, cb);
|
|
|
|
s_t = cb->args[0];
|
|
if (s_t == 0)
|
|
s_t = cb->args[0] = RT_MIN_TABLE;
|
|
|
|
for(t = s_t; t <= RT_TABLE_MAX; t++) {
|
|
if (t < s_t)
|
|
continue;
|
|
if (t > s_t)
|
|
memset(&cb->args[1], 0,
|
|
sizeof(cb->args) - sizeof(cb->args[0]));
|
|
tb = dn_fib_get_table(t, 0);
|
|
if (tb == NULL)
|
|
continue;
|
|
if (tb->dump(tb, skb, cb) < 0)
|
|
break;
|
|
}
|
|
|
|
cb->args[0] = t;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static void fib_magic(int cmd, int type, __le16 dst, int dst_len, struct dn_ifaddr *ifa)
|
|
{
|
|
struct dn_fib_table *tb;
|
|
struct {
|
|
struct nlmsghdr nlh;
|
|
struct rtmsg rtm;
|
|
} req;
|
|
struct dn_kern_rta rta;
|
|
|
|
memset(&req.rtm, 0, sizeof(req.rtm));
|
|
memset(&rta, 0, sizeof(rta));
|
|
|
|
if (type == RTN_UNICAST)
|
|
tb = dn_fib_get_table(RT_MIN_TABLE, 1);
|
|
else
|
|
tb = dn_fib_get_table(RT_TABLE_LOCAL, 1);
|
|
|
|
if (tb == NULL)
|
|
return;
|
|
|
|
req.nlh.nlmsg_len = sizeof(req);
|
|
req.nlh.nlmsg_type = cmd;
|
|
req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND;
|
|
req.nlh.nlmsg_pid = 0;
|
|
req.nlh.nlmsg_seq = 0;
|
|
|
|
req.rtm.rtm_dst_len = dst_len;
|
|
req.rtm.rtm_table = tb->n;
|
|
req.rtm.rtm_protocol = RTPROT_KERNEL;
|
|
req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST);
|
|
req.rtm.rtm_type = type;
|
|
|
|
rta.rta_dst = &dst;
|
|
rta.rta_prefsrc = &ifa->ifa_local;
|
|
rta.rta_oif = &ifa->ifa_dev->dev->ifindex;
|
|
|
|
if (cmd == RTM_NEWROUTE)
|
|
tb->insert(tb, &req.rtm, &rta, &req.nlh, NULL);
|
|
else
|
|
tb->delete(tb, &req.rtm, &rta, &req.nlh, NULL);
|
|
}
|
|
|
|
static void dn_fib_add_ifaddr(struct dn_ifaddr *ifa)
|
|
{
|
|
|
|
fib_magic(RTM_NEWROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
|
|
|
|
#if 0
|
|
if (!(dev->flags&IFF_UP))
|
|
return;
|
|
/* In the future, we will want to add default routes here */
|
|
|
|
#endif
|
|
}
|
|
|
|
static void dn_fib_del_ifaddr(struct dn_ifaddr *ifa)
|
|
{
|
|
int found_it = 0;
|
|
struct net_device *dev;
|
|
struct dn_dev *dn_db;
|
|
struct dn_ifaddr *ifa2;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* Scan device list */
|
|
read_lock(&dev_base_lock);
|
|
for(dev = dev_base; dev; dev = dev->next) {
|
|
dn_db = dev->dn_ptr;
|
|
if (dn_db == NULL)
|
|
continue;
|
|
for(ifa2 = dn_db->ifa_list; ifa2; ifa2 = ifa2->ifa_next) {
|
|
if (ifa2->ifa_local == ifa->ifa_local) {
|
|
found_it = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
read_unlock(&dev_base_lock);
|
|
|
|
if (found_it == 0) {
|
|
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
|
|
|
|
if (dnet_addr_type(ifa->ifa_local) != RTN_LOCAL) {
|
|
if (dn_fib_sync_down(ifa->ifa_local, NULL, 0))
|
|
dn_fib_flush();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void dn_fib_disable_addr(struct net_device *dev, int force)
|
|
{
|
|
if (dn_fib_sync_down(0, dev, force))
|
|
dn_fib_flush();
|
|
dn_rt_cache_flush(0);
|
|
neigh_ifdown(&dn_neigh_table, dev);
|
|
}
|
|
|
|
static int dn_fib_dnaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
{
|
|
struct dn_ifaddr *ifa = (struct dn_ifaddr *)ptr;
|
|
|
|
switch(event) {
|
|
case NETDEV_UP:
|
|
dn_fib_add_ifaddr(ifa);
|
|
dn_fib_sync_up(ifa->ifa_dev->dev);
|
|
dn_rt_cache_flush(-1);
|
|
break;
|
|
case NETDEV_DOWN:
|
|
dn_fib_del_ifaddr(ifa);
|
|
if (ifa->ifa_dev && ifa->ifa_dev->ifa_list == NULL) {
|
|
dn_fib_disable_addr(ifa->ifa_dev->dev, 1);
|
|
} else {
|
|
dn_rt_cache_flush(-1);
|
|
}
|
|
break;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
int dn_fib_sync_down(__le16 local, struct net_device *dev, int force)
|
|
{
|
|
int ret = 0;
|
|
int scope = RT_SCOPE_NOWHERE;
|
|
|
|
if (force)
|
|
scope = -1;
|
|
|
|
for_fib_info() {
|
|
/*
|
|
* This makes no sense for DECnet.... we will almost
|
|
* certainly have more than one local address the same
|
|
* over all our interfaces. It needs thinking about
|
|
* some more.
|
|
*/
|
|
if (local && fi->fib_prefsrc == local) {
|
|
fi->fib_flags |= RTNH_F_DEAD;
|
|
ret++;
|
|
} else if (dev && fi->fib_nhs) {
|
|
int dead = 0;
|
|
|
|
change_nexthops(fi) {
|
|
if (nh->nh_flags&RTNH_F_DEAD)
|
|
dead++;
|
|
else if (nh->nh_dev == dev &&
|
|
nh->nh_scope != scope) {
|
|
spin_lock_bh(&dn_fib_multipath_lock);
|
|
nh->nh_flags |= RTNH_F_DEAD;
|
|
fi->fib_power -= nh->nh_power;
|
|
nh->nh_power = 0;
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
dead++;
|
|
}
|
|
} endfor_nexthops(fi)
|
|
if (dead == fi->fib_nhs) {
|
|
fi->fib_flags |= RTNH_F_DEAD;
|
|
ret++;
|
|
}
|
|
}
|
|
} endfor_fib_info();
|
|
return ret;
|
|
}
|
|
|
|
|
|
int dn_fib_sync_up(struct net_device *dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!(dev->flags&IFF_UP))
|
|
return 0;
|
|
|
|
for_fib_info() {
|
|
int alive = 0;
|
|
|
|
change_nexthops(fi) {
|
|
if (!(nh->nh_flags&RTNH_F_DEAD)) {
|
|
alive++;
|
|
continue;
|
|
}
|
|
if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP))
|
|
continue;
|
|
if (nh->nh_dev != dev || dev->dn_ptr == NULL)
|
|
continue;
|
|
alive++;
|
|
spin_lock_bh(&dn_fib_multipath_lock);
|
|
nh->nh_power = 0;
|
|
nh->nh_flags &= ~RTNH_F_DEAD;
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
} endfor_nexthops(fi);
|
|
|
|
if (alive > 0) {
|
|
fi->fib_flags &= ~RTNH_F_DEAD;
|
|
ret++;
|
|
}
|
|
} endfor_fib_info();
|
|
return ret;
|
|
}
|
|
|
|
void dn_fib_flush(void)
|
|
{
|
|
int flushed = 0;
|
|
struct dn_fib_table *tb;
|
|
int id;
|
|
|
|
for(id = RT_TABLE_MAX; id > 0; id--) {
|
|
if ((tb = dn_fib_get_table(id, 0)) == NULL)
|
|
continue;
|
|
flushed += tb->flush(tb);
|
|
}
|
|
|
|
if (flushed)
|
|
dn_rt_cache_flush(-1);
|
|
}
|
|
|
|
static struct notifier_block dn_fib_dnaddr_notifier = {
|
|
.notifier_call = dn_fib_dnaddr_event,
|
|
};
|
|
|
|
void __exit dn_fib_cleanup(void)
|
|
{
|
|
dn_fib_table_cleanup();
|
|
dn_fib_rules_cleanup();
|
|
|
|
unregister_dnaddr_notifier(&dn_fib_dnaddr_notifier);
|
|
}
|
|
|
|
|
|
void __init dn_fib_init(void)
|
|
{
|
|
|
|
dn_fib_table_init();
|
|
dn_fib_rules_init();
|
|
|
|
register_dnaddr_notifier(&dn_fib_dnaddr_notifier);
|
|
}
|
|
|
|
|