summaryrefslogtreecommitdiffstats
path: root/net/ipv4/fib_semantics.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/fib_semantics.c')
-rw-r--r--net/ipv4/fib_semantics.c112
1 files changed, 74 insertions, 38 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index b78f7ebaf..bb9f81658 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -5,7 +5,7 @@
*
* IPv4 Forwarding Information Base: semantics.
*
- * Version: $Id: fib_semantics.c,v 1.13 1999/03/21 05:22:34 davem Exp $
+ * Version: $Id: fib_semantics.c,v 1.15 1999/08/20 11:05:07 davem Exp $
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
@@ -46,6 +46,8 @@
#define FSprintk(a...)
static struct fib_info *fib_info_list;
+static rwlock_t fib_info_lock = RW_LOCK_UNLOCKED;
+int fib_info_cnt;
#define for_fib_info() { struct fib_info *fi; \
for (fi = fib_info_list; fi; fi = fi->fib_next)
@@ -98,19 +100,38 @@ static struct
{ -EINVAL, RT_SCOPE_NOWHERE} /* RTN_XRESOLVE */
};
+
/* Release a nexthop info record */
+void free_fib_info(struct fib_info *fi)
+{
+ if (fi->fib_dead == 0) {
+ printk("Freeing alive fib_info %p\n", fi);
+ return;
+ }
+ change_nexthops(fi) {
+ if (nh->nh_dev)
+ dev_put(nh->nh_dev);
+ nh->nh_dev = NULL;
+ } endfor_nexthops(fi);
+ fib_info_cnt--;
+ kfree(fi);
+}
+
void fib_release_info(struct fib_info *fi)
{
- if (fi && !--fi->fib_refcnt) {
+ write_lock(&fib_info_lock);
+ if (fi && --fi->fib_treeref == 0) {
if (fi->fib_next)
fi->fib_next->fib_prev = fi->fib_prev;
if (fi->fib_prev)
fi->fib_prev->fib_next = fi->fib_next;
if (fi == fib_info_list)
fib_info_list = fi->fib_next;
- kfree(fi);
+ fi->fib_dead = 1;
+ fib_info_put(fi);
}
+ write_unlock(&fib_info_lock);
}
extern __inline__ int nh_comp(const struct fib_info *fi, const struct fib_info *ofi)
@@ -142,9 +163,7 @@ extern __inline__ struct fib_info * fib_find_info(const struct fib_info *nfi)
if (nfi->fib_protocol == fi->fib_protocol &&
nfi->fib_prefsrc == fi->fib_prefsrc &&
nfi->fib_priority == fi->fib_priority &&
- nfi->fib_mtu == fi->fib_mtu &&
- nfi->fib_rtt == fi->fib_rtt &&
- nfi->fib_window == fi->fib_window &&
+ memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 &&
((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
(nfi->fib_nhs == 0 || nh_comp(fi, nfi) == 0))
return fi;
@@ -156,17 +175,21 @@ extern __inline__ struct fib_info * fib_find_info(const struct fib_info *nfi)
Used only by redirect accept routine.
*/
-int ip_fib_check_default(u32 gw, struct device *dev)
+int ip_fib_check_default(u32 gw, struct net_device *dev)
{
+ read_lock(&fib_info_lock);
for_fib_info() {
if (fi->fib_flags & RTNH_F_DEAD)
continue;
for_nexthops(fi) {
if (nh->nh_dev == dev && nh->nh_gw == gw &&
- !(nh->nh_flags&RTNH_F_DEAD))
+ !(nh->nh_flags&RTNH_F_DEAD)) {
+ read_unlock(&fib_info_lock);
return 0;
+ }
} endfor_nexthops(fi);
} endfor_fib_info();
+ read_unlock(&fib_info_lock);
return -1;
}
@@ -331,17 +354,18 @@ static int fib_check_nh(const struct rtmsg *r, struct fib_info *fi, struct fib_n
return 0;
#endif
if (nh->nh_flags&RTNH_F_ONLINK) {
- struct device *dev;
+ struct net_device *dev;
if (r->rtm_scope >= RT_SCOPE_LINK)
return -EINVAL;
if (inet_addr_type(nh->nh_gw) != RTN_UNICAST)
return -EINVAL;
- if ((dev = dev_get_by_index(nh->nh_oif)) == NULL)
+ if ((dev = __dev_get_by_index(nh->nh_oif)) == NULL)
return -ENODEV;
if (!(dev->flags&IFF_UP))
return -ENETDOWN;
nh->nh_dev = dev;
+ atomic_inc(&dev->refcnt);
nh->nh_scope = RT_SCOPE_LINK;
return 0;
}
@@ -359,6 +383,9 @@ static int fib_check_nh(const struct rtmsg *r, struct fib_info *fi, struct fib_n
nh->nh_scope = res.scope;
nh->nh_oif = FIB_RES_OIF(res);
nh->nh_dev = FIB_RES_DEV(res);
+ if (nh->nh_dev)
+ atomic_inc(&nh->nh_dev->refcnt);
+ fib_res_put(&res);
} else {
struct in_device *in_dev;
@@ -368,10 +395,14 @@ static int fib_check_nh(const struct rtmsg *r, struct fib_info *fi, struct fib_n
in_dev = inetdev_by_index(nh->nh_oif);
if (in_dev == NULL)
return -ENODEV;
- if (!(in_dev->dev->flags&IFF_UP))
+ if (!(in_dev->dev->flags&IFF_UP)) {
+ in_dev_put(in_dev);
return -ENETDOWN;
+ }
nh->nh_dev = in_dev->dev;
+ atomic_inc(&nh->nh_dev->refcnt);
nh->nh_scope = RT_SCOPE_HOST;
+ in_dev_put(in_dev);
}
return 0;
}
@@ -405,6 +436,7 @@ fib_create_info(const struct rtmsg *r, struct kern_rta *rta,
err = -ENOBUFS;
if (fi == NULL)
goto failure;
+ fib_info_cnt++;
memset(fi, 0, sizeof(*fi)+nhs*sizeof(struct fib_nh));
fi->fib_protocol = r->rtm_protocol;
@@ -419,7 +451,7 @@ fib_create_info(const struct rtmsg *r, struct kern_rta *rta,
while (RTA_OK(attr, attrlen)) {
unsigned flavor = attr->rta_type;
if (flavor) {
- if (flavor > FIB_MAX_METRICS)
+ if (flavor > RTAX_MAX)
goto err_inval;
fi->fib_metrics[flavor-1] = *(unsigned*)RTA_DATA(attr);
}
@@ -505,17 +537,21 @@ fib_create_info(const struct rtmsg *r, struct kern_rta *rta,
link_it:
if ((ofi = fib_find_info(fi)) != NULL) {
- kfree(fi);
- ofi->fib_refcnt++;
+ fi->fib_dead = 1;
+ free_fib_info(fi);
+ ofi->fib_treeref++;
return ofi;
}
- fi->fib_refcnt++;
+ fi->fib_treeref++;
+ atomic_inc(&fi->fib_clntref);
+ write_lock(&fib_info_lock);
fi->fib_next = fib_info_list;
fi->fib_prev = NULL;
if (fib_info_list)
fib_info_list->fib_prev = fi;
fib_info_list = fi;
+ write_unlock(&fib_info_lock);
return fi;
err_inval:
@@ -523,8 +559,10 @@ err_inval:
failure:
*errp = err;
- if (fi)
- kfree(fi);
+ if (fi) {
+ fi->fib_dead = 1;
+ free_fib_info(fi);
+ }
return NULL;
}
@@ -543,6 +581,7 @@ fib_semantic_match(int type, struct fib_info *fi, const struct rt_key *key, stru
#ifdef CONFIG_IP_ROUTE_NAT
case RTN_NAT:
FIB_RES_RESET(*res);
+ atomic_inc(&fi->fib_clntref);
return 0;
#endif
case RTN_UNICAST:
@@ -559,15 +598,20 @@ fib_semantic_match(int type, struct fib_info *fi, const struct rt_key *key, stru
#ifdef CONFIG_IP_ROUTE_MULTIPATH
if (nhsel < fi->fib_nhs) {
res->nh_sel = nhsel;
+ atomic_inc(&fi->fib_clntref);
return 0;
}
#else
- if (nhsel < 1)
+ if (nhsel < 1) {
+ atomic_inc(&fi->fib_clntref);
return 0;
+ }
#endif
endfor_nexthops(fi);
+ res->fi = NULL;
return 1;
default:
+ res->fi = NULL;
printk(KERN_DEBUG "impossible 102\n");
return -EINVAL;
}
@@ -612,16 +656,8 @@ fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
if (fi->fib_nh[0].nh_tclassid)
RTA_PUT(skb, RTA_FLOW, 4, &fi->fib_nh[0].nh_tclassid);
#endif
- if (fi->fib_mtu || fi->fib_window || fi->fib_rtt) {
- int i;
- struct rtattr *mx = (struct rtattr *)skb->tail;
- RTA_PUT(skb, RTA_METRICS, 0, NULL);
- for (i=0; i<FIB_MAX_METRICS; i++) {
- if (fi->fib_metrics[i])
- RTA_PUT(skb, i+1, sizeof(unsigned), fi->fib_metrics + i);
- }
- mx->rta_len = skb->tail - (u8*)mx;
- }
+ if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)
+ goto rtattr_failure;
if (fi->fib_prefsrc)
RTA_PUT(skb, RTA_PREFSRC, 4, &fi->fib_prefsrc);
if (fi->fib_nhs == 1) {
@@ -731,7 +767,7 @@ fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
#ifdef CONFIG_IP_ALIAS
char *colon;
#endif
- struct device *dev;
+ struct net_device *dev;
char devname[IFNAMSIZ];
if (copy_from_user(devname, r->rt_dev, IFNAMSIZ-1))
@@ -742,14 +778,14 @@ fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
if (colon)
*colon = 0;
#endif
- dev = dev_get(devname);
+ dev = __dev_get_by_name(devname);
if (!dev)
return -ENODEV;
rta->rta_oif = &dev->ifindex;
#ifdef CONFIG_IP_ALIAS
if (colon) {
struct in_ifaddr *ifa;
- struct in_device *in_dev = dev->ip_ptr;
+ struct in_device *in_dev = __in_dev_get(dev);
if (!in_dev)
return -ENODEV;
*colon = ':';
@@ -789,10 +825,10 @@ fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
mx->rta_len = RTA_LENGTH(0);
if (r->rt_flags&RTF_MTU) {
rec = (void*)((char*)mx + RTA_ALIGN(mx->rta_len));
- rec->rta_type = RTAX_MTU;
+ rec->rta_type = RTAX_ADVMSS;
rec->rta_len = RTA_LENGTH(4);
mx->rta_len += RTA_LENGTH(4);
- *(u32*)RTA_DATA(rec) = r->rt_mtu;
+ *(u32*)RTA_DATA(rec) = r->rt_mtu - 40;
}
if (r->rt_flags&RTF_WINDOW) {
rec = (void*)((char*)mx + RTA_ALIGN(mx->rta_len));
@@ -806,7 +842,7 @@ fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
rec->rta_type = RTAX_RTT;
rec->rta_len = RTA_LENGTH(4);
mx->rta_len += RTA_LENGTH(4);
- *(u32*)RTA_DATA(rec) = r->rt_irtt;
+ *(u32*)RTA_DATA(rec) = r->rt_irtt<<3;
}
}
return 0;
@@ -821,7 +857,7 @@ fib_convert_rtentry(int cmd, struct nlmsghdr *nl, struct rtmsg *rtm,
- device went down -> we must shutdown all nexthops going via it.
*/
-int fib_sync_down(u32 local, struct device *dev, int force)
+int fib_sync_down(u32 local, struct net_device *dev, int force)
{
int ret = 0;
int scope = RT_SCOPE_NOWHERE;
@@ -865,7 +901,7 @@ int fib_sync_down(u32 local, struct device *dev, int force)
It takes sense only on multipath routes.
*/
-int fib_sync_up(struct device *dev)
+int fib_sync_up(struct net_device *dev)
{
int ret = 0;
@@ -882,7 +918,7 @@ int fib_sync_up(struct device *dev)
}
if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP))
continue;
- if (nh->nh_dev != dev || dev->ip_ptr == NULL)
+ if (nh->nh_dev != dev || __in_dev_get(dev) == NULL)
continue;
alive++;
nh->nh_power = 0;
@@ -977,7 +1013,7 @@ void fib_node_get_info(int type, int dead, struct fib_info *fi, u32 prefix, u32
len = sprintf(buffer, "%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u",
fi->fib_dev ? fi->fib_dev->name : "*", prefix,
fi->fib_nh->nh_gw, flags, 0, 0, fi->fib_priority,
- mask, fi->fib_mtu, fi->fib_window, fi->fib_rtt);
+ mask, fi->fib_advmss+40, fi->fib_window, fi->fib_rtt>>3);
} else {
len = sprintf(buffer, "*\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u",
prefix, 0,
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 05:50:25 +0000