static void fib4_rule_flush_cache(struct fib_rules_ops *ops)
{
#ifdef FIB_RULE_DEBUG
printk(KERN_DEBUG "[NET][IPV4][RULE] %s \n", __func__);
#endif
rt_cache_flush(ops->fro_net, -1);
}
static __inline__ void fib_flush_1(struct device *dev)
{
struct fib_zone *fz;
int found = 0;
for (fz = fib_zone_list; fz; fz = fz->fz_next)
{
if (fz->fz_hash_table)
{
int i;
int tmp = 0;
for (i=0; i<RTZ_HASH_DIVISOR; i++)
tmp += rt_flush_list(&fz->fz_hash_table[i], dev);
fz->fz_nent -= tmp;
found += tmp;
}
else
{
int tmp;
tmp = rt_flush_list(&fz->fz_list, dev);
fz->fz_nent -= tmp;
found += tmp;
}
}
if (found)
rt_cache_flush();
}
static void fib_flush(struct net *net)
{
int flushed = 0;
struct fib_table *tb;
struct hlist_node *node;
struct hlist_head *head;
unsigned int h;
for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
head = &net->ipv4.fib_table_hash[h];
hlist_for_each_entry(tb, node, head, tb_hlist)
flushed += tb->tb_flush(tb);
}
if (flushed)
rt_cache_flush(net, -1);
}
static __inline__ int fib_del_1(__u32 dst, __u32 mask,
struct device * dev, __u32 gtw, short flags, short metric)
{
struct fib_node **fp;
struct fib_zone *fz;
int found=0;
if (!mask)
{
for (fz=fib_zone_list; fz; fz = fz->fz_next)
{
int tmp;
if (fz->fz_hash_table)
fp = &fz->fz_hash_table[fz_hash_code(dst, fz->fz_logmask)];
else
fp = &fz->fz_list;
tmp = fib_del_list(fp, dst, dev, gtw, flags, metric, mask);
fz->fz_nent -= tmp;
found += tmp;
}
}
else
{
if ((fz = fib_zones[rt_logmask(mask)]) != NULL)
{
if (fz->fz_hash_table)
fp = &fz->fz_hash_table[fz_hash_code(dst, fz->fz_logmask)];
else
fp = &fz->fz_list;
found = fib_del_list(fp, dst, dev, gtw, flags, metric, mask);
fz->fz_nent -= found;
}
}
if (found)
{
rt_cache_flush();
return 0;
}
return -ESRCH;
}
void fib_flush(void)
{
int flushed = 0;
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_table *tb;
int id;
for (id = RT_TABLE_MAX; id>0; id--) {
if ((tb = fib_get_table(id))==NULL)
continue;
flushed += tb->tb_flush(tb);
}
#else /* CONFIG_IP_MULTIPLE_TABLES */
flushed += main_table->tb_flush(main_table);
flushed += local_table->tb_flush(local_table);
#endif /* CONFIG_IP_MULTIPLE_TABLES */
if (flushed)
rt_cache_flush(-1);
}
static void fib4_rule_flush_cache(struct fib_rules_ops *ops)
{
rt_cache_flush(ops->fro_net, -1);
}
static __inline__ void fib_add_1(short flags, __u32 dst, __u32 mask,
__u32 gw, struct device *dev, unsigned short mss,
unsigned long window, unsigned short irtt, short metric)
{
struct fib_node *f, *f1;
struct fib_node **fp;
struct fib_node **dup_fp = NULL;
struct fib_zone * fz;
struct fib_info * fi;
int logmask;
/*
* Allocate an entry and fill it in.
*/
f = (struct fib_node *) kmalloc(sizeof(struct fib_node), GFP_KERNEL);
if (f == NULL)
return;
memset(f, 0, sizeof(struct fib_node));
f->fib_dst = dst;
f->fib_metric = metric;
f->fib_tos = 0;
if ((fi = fib_create_info(gw, dev, flags, mss, window, irtt)) == NULL)
{
kfree_s(f, sizeof(struct fib_node));
return;
}
f->fib_info = fi;
logmask = rt_logmask(mask);
fz = fib_zones[logmask];
if (!fz)
{
int i;
fz = kmalloc(sizeof(struct fib_zone), GFP_KERNEL);
if (!fz)
{
fib_free_node(f);
return;
}
memset(fz, 0, sizeof(struct fib_zone));
fz->fz_logmask = logmask;
fz->fz_mask = mask;
for (i=logmask-1; i>=0; i--)
if (fib_zones[i])
break;
cli();
if (i<0)
{
fz->fz_next = fib_zone_list;
fib_zone_list = fz;
}
else
{
fz->fz_next = fib_zones[i]->fz_next;
fib_zones[i]->fz_next = fz;
}
fib_zones[logmask] = fz;
sti();
}
/*
* If zone overgrows RTZ_HASHING_LIMIT, create hash table.
*/
if (fz->fz_nent >= RTZ_HASHING_LIMIT && !fz->fz_hash_table && logmask<32)
{
struct fib_node ** ht;
#if RT_CACHE_DEBUG >= 2
printk("fib_add_1: hashing for zone %d started\n", logmask);
#endif
ht = kmalloc(RTZ_HASH_DIVISOR*sizeof(struct rtable*), GFP_KERNEL);
if (ht)
{
memset(ht, 0, RTZ_HASH_DIVISOR*sizeof(struct fib_node*));
cli();
f1 = fz->fz_list;
while (f1)
{
struct fib_node * next, **end;
unsigned hash = fz_hash_code(f1->fib_dst, logmask);
next = f1->fib_next;
f1->fib_next = NULL;
end = &ht[hash];
while(*end != NULL)
end = &(*end)->fib_next;
*end = f1;
f1 = next;
}
fz->fz_list = NULL;
fz->fz_hash_table = ht;
sti();
}
}
if (fz->fz_hash_table)
fp = &fz->fz_hash_table[fz_hash_code(dst, logmask)];
else
fp = &fz->fz_list;
/*
* Scan list to find the first route with the same destination
*/
while ((f1 = *fp) != NULL)
{
if (f1->fib_dst == dst)
break;
fp = &f1->fib_next;
}
/*
* Find route with the same destination and less (or equal) metric.
*/
while ((f1 = *fp) != NULL && f1->fib_dst == dst)
{
if (f1->fib_metric >= metric)
break;
/*
* Record route with the same destination and gateway,
* but less metric. We'll delete it
* after instantiation of new route.
*/
if (f1->fib_info->fib_gateway == gw &&
(gw || f1->fib_info->fib_dev == dev))
dup_fp = fp;
fp = &f1->fib_next;
}
/*
* Is it already present?
*/
if (f1 && f1->fib_metric == metric && f1->fib_info == fi)
{
fib_free_node(f);
return;
}
/*
* Insert new entry to the list.
*/
cli();
f->fib_next = f1;
*fp = f;
if (!fib_loopback && (fi->fib_dev->flags & IFF_LOOPBACK))
fib_loopback = f;
sti();
fz->fz_nent++;
ip_netlink_msg(RTMSG_NEWROUTE, dst, gw, mask, flags, metric, fi->fib_dev->name);
/*
* Delete route with the same destination and gateway.
* Note that we should have at most one such route.
*/
if (dup_fp)
fp = dup_fp;
else
fp = &f->fib_next;
while ((f1 = *fp) != NULL && f1->fib_dst == dst)
{
if (f1->fib_info->fib_gateway == gw &&
(gw || f1->fib_info->fib_dev == dev))
{
cli();
*fp = f1->fib_next;
if (fib_loopback == f1)
fib_loopback = NULL;
sti();
ip_netlink_msg(RTMSG_DELROUTE, dst, gw, mask, flags, metric, f1->fib_info->fib_dev->name);
fib_free_node(f1);
fz->fz_nent--;
break;
}
fp = &f1->fib_next;
}
rt_cache_flush();
return;
}