#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/socket.h>
-#include <linux/sched.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#ifdef CONFIG_SYSCTL
static struct neigh_table *neigh_tables;
#ifdef CONFIG_PROC_FS
-static struct file_operations neigh_stat_seq_fops;
+static const struct file_operations neigh_stat_seq_fops;
#endif
/*
n->dead = 1;
shrunk = 1;
write_unlock(&n->lock);
+ if (n->parms->neigh_cleanup)
+ n->parms->neigh_cleanup(n);
neigh_release(n);
continue;
}
NEIGH_PRINTK2("neigh %p is stray.\n", n);
}
write_unlock(&n->lock);
+ if (n->parms->neigh_cleanup)
+ n->parms->neigh_cleanup(n);
neigh_release(n);
}
}
goto out_entries;
}
- n = kmem_cache_alloc(tbl->kmem_cachep, GFP_ATOMIC);
+ n = kmem_cache_zalloc(tbl->kmem_cachep, GFP_ATOMIC);
if (!n)
goto out_entries;
- memset(n, 0, tbl->entry_size);
-
skb_queue_head_init(&n->arp_queue);
rwlock_init(&n->lock);
n->updated = n->used = now;
struct neighbour *n;
int key_len = tbl->key_len;
u32 hash_val = tbl->hash(pkey, dev);
-
+
NEIGH_CACHE_STAT_INC(tbl, lookups);
read_lock_bh(&tbl->lock);
kfree(hh);
}
- if (neigh->parms->neigh_destructor)
- (neigh->parms->neigh_destructor)(neigh);
-
skb_queue_purge(&neigh->arp_queue);
dev_put(neigh->dev);
*np = n->next;
n->dead = 1;
write_unlock(&n->lock);
+ if (n->parms->neigh_cleanup)
+ n->parms->neigh_cleanup(n);
neigh_release(n);
continue;
}
np = &n->next;
}
- /* Cycle through all hash buckets every base_reachable_time/2 ticks.
- * ARP entry timeouts range from 1/2 base_reachable_time to 3/2
- * base_reachable_time.
+ /* Cycle through all hash buckets every base_reachable_time/2 ticks.
+ * ARP entry timeouts range from 1/2 base_reachable_time to 3/2
+ * base_reachable_time.
*/
expire = tbl->parms.base_reachable_time >> 1;
expire /= (tbl->hash_mask + 1);
if (!expire)
expire = 1;
- mod_timer(&tbl->gc_timer, now + expire);
+ if (expire>HZ)
+ mod_timer(&tbl->gc_timer, round_jiffies(now + expire));
+ else
+ mod_timer(&tbl->gc_timer, now + expire);
write_unlock(&tbl->lock);
}
}
if (state & NUD_REACHABLE) {
- if (time_before_eq(now,
+ if (time_before_eq(now,
neigh->confirmed + neigh->parms->reachable_time)) {
NEIGH_PRINTK2("neigh %p is still alive.\n", neigh);
next = neigh->confirmed + neigh->parms->reachable_time;
notify = 1;
}
} else if (state & NUD_DELAY) {
- if (time_before_eq(now,
+ if (time_before_eq(now,
neigh->confirmed + neigh->parms->delay_probe_time)) {
NEIGH_PRINTK2("neigh %p is now reachable.\n", neigh);
neigh->nud_state = NUD_REACHABLE;
goto out_unlock_bh;
now = jiffies;
-
+
if (!(neigh->nud_state & (NUD_STALE | NUD_INCOMPLETE))) {
if (neigh->parms->mcast_probes + neigh->parms->app_probes) {
atomic_set(&neigh->probes, neigh->parms->ucast_probes);
NEIGH_UPDATE_F_OVERRIDE allows to override existing lladdr,
if it is different.
NEIGH_UPDATE_F_WEAK_OVERRIDE will suspect existing "connected"
- lladdr instead of overriding it
+ lladdr instead of overriding it
if it is different.
It also allows to retain current state
if lladdr is unchanged.
NEIGH_UPDATE_F_ADMIN means that the change is administrative.
- NEIGH_UPDATE_F_OVERRIDE_ISROUTER allows to override existing
+ NEIGH_UPDATE_F_OVERRIDE_ISROUTER allows to override existing
NTF_ROUTER flag.
NEIGH_UPDATE_F_ISROUTER indicates if the neighbour is known as
a router.
old = neigh->nud_state;
err = -EPERM;
- if (!(flags & NEIGH_UPDATE_F_ADMIN) &&
+ if (!(flags & NEIGH_UPDATE_F_ADMIN) &&
(old & (NUD_NOARP | NUD_PERMANENT)))
goto out;
- compare new & old
- if they are different, check override flag
*/
- if ((old & NUD_VALID) &&
+ if ((old & NUD_VALID) &&
!memcmp(lladdr, neigh->ha, dev->addr_len))
lladdr = neigh->ha;
} else {
neigh_del_timer(neigh);
if (new & NUD_IN_TIMER) {
neigh_hold(neigh);
- neigh_add_timer(neigh, (jiffies +
- ((new & NUD_REACHABLE) ?
+ neigh_add_timer(neigh, (jiffies +
+ ((new & NUD_REACHABLE) ?
neigh->parms->reachable_time :
0)));
}
struct neighbour *neigh = __neigh_lookup(tbl, saddr, dev,
lladdr || !dev->addr_len);
if (neigh)
- neigh_update(neigh, lladdr, NUD_STALE,
+ neigh_update(neigh, lladdr, NUD_STALE,
NEIGH_UPDATE_F_OVERRIDE);
return neigh;
}
{
struct net_device *dev = skb->dev;
- __skb_pull(skb, skb->nh.raw - skb->data);
+ __skb_pull(skb, skb_network_offset(skb));
if (dev->hard_header &&
dev->hard_header(skb, dev, ntohs(skb->protocol), NULL, NULL,
- skb->len) < 0 &&
+ skb->len) < 0 &&
dev->rebuild_header(skb))
return 0;
if (!dst || !(neigh = dst->neighbour))
goto discard;
- __skb_pull(skb, skb->nh.raw - skb->data);
+ __skb_pull(skb, skb_network_offset(skb));
if (!neigh_event_send(neigh, skb)) {
int err;
struct neighbour *neigh = dst->neighbour;
struct net_device *dev = neigh->dev;
- __skb_pull(skb, skb->nh.raw - skb->data);
+ __skb_pull(skb, skb_network_offset(skb));
read_lock_bh(&neigh->lock);
err = dev->hard_header(skb, dev, ntohs(skb->protocol),
kfree(parms);
}
+static struct lock_class_key neigh_table_proxy_queue_class;
+
void neigh_table_init_no_netlink(struct neigh_table *tbl)
{
unsigned long now = jiffies;
tbl->stats = alloc_percpu(struct neigh_statistics);
if (!tbl->stats)
panic("cannot create neighbour cache statistics");
-
+
#ifdef CONFIG_PROC_FS
tbl->pde = create_proc_entry(tbl->id, 0, proc_net_stat);
- if (!tbl->pde)
+ if (!tbl->pde)
panic("cannot create neighbour proc dir entry");
tbl->pde->proc_fops = &neigh_stat_seq_fops;
tbl->pde->data = tbl;
init_timer(&tbl->proxy_timer);
tbl->proxy_timer.data = (unsigned long)tbl;
tbl->proxy_timer.function = neigh_proxy_process;
- skb_queue_head_init(&tbl->proxy_queue);
+ skb_queue_head_init_class(&tbl->proxy_queue,
+ &neigh_table_proxy_queue_class);
tbl->last_flush = now;
tbl->last_rand = now + tbl->parms.reachable_time * 20;
return 0;
}
-int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct ndmsg *ndm;
struct nlattr *dst_attr;
return err;
}
-int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct ndmsg *ndm;
struct nlattr *tb[NDA_MAX+1];
err = -ENOENT;
goto out_dev_put;
}
-
+
neigh = __neigh_lookup_errno(tbl, dst, dev);
if (IS_ERR(neigh)) {
err = PTR_ERR(neigh);
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);
if (nlh == NULL)
- return -ENOBUFS;
+ return -EMSGSIZE;
ndtmsg = nlmsg_data(nlh);
nla_put_failure:
read_unlock_bh(&tbl->lock);
- return nlmsg_cancel(skb, nlh);
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
static int neightbl_fill_param_info(struct sk_buff *skb,
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndtmsg), flags);
if (nlh == NULL)
- return -ENOBUFS;
+ return -EMSGSIZE;
ndtmsg = nlmsg_data(nlh);
return nlmsg_end(skb, nlh);
errout:
read_unlock_bh(&tbl->lock);
- return nlmsg_cancel(skb, nlh);
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
-
+
static inline struct neigh_parms *lookup_neigh_params(struct neigh_table *tbl,
int ifindex)
{
struct neigh_parms *p;
-
+
for (p = &tbl->parms; p; p = p->next)
if ((p->dev && p->dev->ifindex == ifindex) ||
(!p->dev && !ifindex))
[NDTPA_LOCKTIME] = { .type = NLA_U64 },
};
-int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
struct neigh_table *tbl;
struct ndtmsg *ndtmsg;
goto errout_locked;
}
- /*
+ /*
* We acquire tbl->lock to be nice to the periodic timers and
* make sure they always see a consistent set of values.
*/
return err;
}
-int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
+static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
{
int family, tidx, nidx = 0;
int tbl_skip = cb->args[0];
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), flags);
if (nlh == NULL)
- return -ENOBUFS;
+ return -EMSGSIZE;
ndm = nlmsg_data(nlh);
ndm->ndm_family = neigh->ops->family;
return nlmsg_end(skb, nlh);
nla_put_failure:
- return nlmsg_cancel(skb, nlh);
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
return rc;
}
-int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
+static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
{
struct neigh_table *tbl;
int t, family, s_t;
} else
np = &n->next;
write_unlock(&n->lock);
- if (release)
+ if (release) {
+ if (n->parms->neigh_cleanup)
+ n->parms->neigh_cleanup(n);
neigh_release(n);
+ }
}
}
}
if (*pos == 0)
return SEQ_START_TOKEN;
-
+
for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
if (!cpu_possible(cpu))
continue;
return 0;
}
-static struct seq_operations neigh_stat_seq_ops = {
+static const struct seq_operations neigh_stat_seq_ops = {
.start = neigh_stat_seq_start,
.next = neigh_stat_seq_next,
.stop = neigh_stat_seq_stop,
return ret;
};
-static struct file_operations neigh_stat_seq_fops = {
+static const struct file_operations neigh_stat_seq_fops = {
.owner = THIS_MODULE,
.open = neigh_stat_seq_open,
.read = seq_read,
goto errout;
err = neigh_fill_info(skb, n, 0, 0, type, flags);
- /* failure implies BUG in neigh_nlmsg_size() */
- BUG_ON(err < 0);
-
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in neigh_nlmsg_size() */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(skb);
+ goto errout;
+ }
err = rtnl_notify(skb, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
errout:
if (err < 0)
};
int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
- int p_id, int pdev_id, char *p_name,
+ int p_id, int pdev_id, char *p_name,
proc_handler *handler, ctl_handler *strategy)
{
struct neigh_sysctl_table *t = kmemdup(&neigh_sysctl_template,
t->neigh_vars[14].procname = NULL;
t->neigh_vars[15].procname = NULL;
} else {
- dev_name_source = t->neigh_dev[0].procname;
+ dev_name_source = t->neigh_dev[0].procname;
t->neigh_vars[12].data = (int *)(p + 1);
t->neigh_vars[13].data = (int *)(p + 1) + 1;
t->neigh_vars[14].data = (int *)(p + 1) + 2;
goto free;
}
- t->neigh_dev[0].procname = dev_name;
+ t->neigh_dev[0].procname = dev_name;
t->neigh_neigh_dir[0].ctl_name = pdev_id;
t->neigh_proto_dir[0].child = t->neigh_neigh_dir;
t->neigh_root_dir[0].child = t->neigh_proto_dir;
- t->sysctl_header = register_sysctl_table(t->neigh_root_dir, 0);
+ t->sysctl_header = register_sysctl_table(t->neigh_root_dir);
if (!t->sysctl_header) {
err = -ENOBUFS;
goto free_procname;
#endif /* CONFIG_SYSCTL */
+static int __init neigh_init(void)
+{
+ rtnl_register(PF_UNSPEC, RTM_NEWNEIGH, neigh_add, NULL);
+ rtnl_register(PF_UNSPEC, RTM_DELNEIGH, neigh_delete, NULL);
+ rtnl_register(PF_UNSPEC, RTM_GETNEIGH, NULL, neigh_dump_info);
+
+ rtnl_register(PF_UNSPEC, RTM_GETNEIGHTBL, NULL, neightbl_dump_info);
+ rtnl_register(PF_UNSPEC, RTM_SETNEIGHTBL, neightbl_set, NULL);
+
+ return 0;
+}
+
+subsys_initcall(neigh_init);
+
EXPORT_SYMBOL(__neigh_event_send);
EXPORT_SYMBOL(neigh_changeaddr);
EXPORT_SYMBOL(neigh_compat_output);
EXPORT_SYMBOL(neigh_connected_output);
EXPORT_SYMBOL(neigh_create);
-EXPORT_SYMBOL(neigh_delete);
EXPORT_SYMBOL(neigh_destroy);
-EXPORT_SYMBOL(neigh_dump_info);
EXPORT_SYMBOL(neigh_event_ns);
EXPORT_SYMBOL(neigh_ifdown);
EXPORT_SYMBOL(neigh_lookup);
projects / powerpc.git / blobdiff