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-rw-r--r--include/linux/inetdevice.h7
-rw-r--r--include/net/neighbour.h13
-rw-r--r--net/core/neighbour.c74
-rw-r--r--net/ipv4/devinet.c2
-rw-r--r--net/ipv4/ipmr.c2
5 files changed, 92 insertions, 6 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index 0d678aefe69d..ae174ca565c9 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -220,6 +220,13 @@ static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
return rtnl_dereference(dev->ip_ptr);
}
+static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
+{
+ struct in_device *in_dev = __in_dev_get_rcu(dev);
+
+ return in_dev ? in_dev->arp_parms : NULL;
+}
+
void in_dev_finish_destroy(struct in_device *idev);
static inline void in_dev_put(struct in_device *idev)
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 95615c9ad13a..41b1ce6c96a8 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -21,6 +21,7 @@
#include <linux/skbuff.h>
#include <linux/rcupdate.h>
#include <linux/seq_file.h>
+#include <linux/bitmap.h>
#include <linux/err.h>
#include <linux/sysctl.h>
@@ -81,16 +82,28 @@ struct neigh_parms {
int reachable_time;
int data[NEIGH_VAR_DATA_MAX];
+ DECLARE_BITMAP(data_state, NEIGH_VAR_DATA_MAX);
};
static inline void neigh_var_set(struct neigh_parms *p, int index, int val)
{
+ set_bit(index, p->data_state);
p->data[index] = val;
}
#define NEIGH_VAR(p, attr) ((p)->data[NEIGH_VAR_ ## attr])
#define NEIGH_VAR_SET(p, attr, val) neigh_var_set(p, NEIGH_VAR_ ## attr, val)
+static inline void neigh_parms_data_state_setall(struct neigh_parms *p)
+{
+ bitmap_fill(p->data_state, NEIGH_VAR_DATA_MAX);
+}
+
+static inline void neigh_parms_data_state_cleanall(struct neigh_parms *p)
+{
+ bitmap_zero(p->data_state, NEIGH_VAR_DATA_MAX);
+}
+
struct neigh_statistics {
unsigned long allocs; /* number of allocated neighs */
unsigned long destroys; /* number of destroyed neighs */
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 65ead080167b..c4a7879bfb15 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -38,6 +38,7 @@
#include <linux/random.h>
#include <linux/string.h>
#include <linux/log2.h>
+#include <linux/inetdevice.h>
#define DEBUG
#define NEIGH_DEBUG 1
@@ -1464,6 +1465,8 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
p->next = tbl->parms.next;
tbl->parms.next = p;
write_unlock_bh(&tbl->lock);
+
+ neigh_parms_data_state_cleanall(p);
}
return p;
}
@@ -2813,22 +2816,68 @@ static int proc_unres_qlen(struct ctl_table *ctl, int write,
return ret;
}
+static struct neigh_parms *neigh_get_dev_parms_rcu(struct net_device *dev,
+ int family)
+{
+ if (family == AF_INET)
+ return __in_dev_arp_parms_get_rcu(dev);
+ return NULL;
+}
+
+static void neigh_copy_dflt_parms(struct net *net, struct neigh_parms *p,
+ int index)
+{
+ struct net_device *dev;
+ int family = neigh_parms_family(p);
+
+ rcu_read_lock();
+ for_each_netdev_rcu(net, dev) {
+ struct neigh_parms *dst_p =
+ neigh_get_dev_parms_rcu(dev, family);
+
+ if (dst_p && !test_bit(index, dst_p->data_state))
+ dst_p->data[index] = p->data[index];
+ }
+ rcu_read_unlock();
+}
+
+static void neigh_proc_update(struct ctl_table *ctl, int write)
+{
+ struct net_device *dev = ctl->extra1;
+ struct neigh_parms *p = ctl->extra2;
+ struct net *net = p->net;
+ int index = (int *) ctl->data - p->data;
+
+ if (!write)
+ return;
+
+ set_bit(index, p->data_state);
+ if (!dev) /* NULL dev means this is default value */
+ neigh_copy_dflt_parms(net, p, index);
+}
+
static int neigh_proc_dointvec_zero_intmax(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
struct ctl_table tmp = *ctl;
+ int ret;
tmp.extra1 = &zero;
tmp.extra2 = &int_max;
- return proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
+ ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
+ neigh_proc_update(ctl, write);
+ return ret;
}
int neigh_proc_dointvec(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- return proc_dointvec(ctl, write, buffer, lenp, ppos);
+ int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+
+ neigh_proc_update(ctl, write);
+ return ret;
}
EXPORT_SYMBOL(neigh_proc_dointvec);
@@ -2836,7 +2885,10 @@ int neigh_proc_dointvec_jiffies(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
- return proc_dointvec_jiffies(ctl, write, buffer, lenp, ppos);
+ int ret = proc_dointvec_jiffies(ctl, write, buffer, lenp, ppos);
+
+ neigh_proc_update(ctl, write);
+ return ret;
}
EXPORT_SYMBOL(neigh_proc_dointvec_jiffies);
@@ -2844,14 +2896,20 @@ static int neigh_proc_dointvec_userhz_jiffies(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
- return proc_dointvec_userhz_jiffies(ctl, write, buffer, lenp, ppos);
+ int ret = proc_dointvec_userhz_jiffies(ctl, write, buffer, lenp, ppos);
+
+ neigh_proc_update(ctl, write);
+ return ret;
}
int neigh_proc_dointvec_ms_jiffies(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
- return proc_dointvec_ms_jiffies(ctl, write, buffer, lenp, ppos);
+ int ret = proc_dointvec_ms_jiffies(ctl, write, buffer, lenp, ppos);
+
+ neigh_proc_update(ctl, write);
+ return ret;
}
EXPORT_SYMBOL(neigh_proc_dointvec_ms_jiffies);
@@ -2859,7 +2917,10 @@ static int neigh_proc_dointvec_unres_qlen(struct ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
- return proc_unres_qlen(ctl, write, buffer, lenp, ppos);
+ int ret = proc_unres_qlen(ctl, write, buffer, lenp, ppos);
+
+ neigh_proc_update(ctl, write);
+ return ret;
}
#define NEIGH_PARMS_DATA_OFFSET(index) \
@@ -2962,6 +3023,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
for (i = 0; i < ARRAY_SIZE(t->neigh_vars); i++) {
t->neigh_vars[i].data += (long) p;
t->neigh_vars[i].extra1 = dev;
+ t->neigh_vars[i].extra2 = p;
}
if (dev) {
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e1c19535fe38..43065be36301 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -500,6 +500,7 @@ static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa)
return -ENOBUFS;
}
ipv4_devconf_setall(in_dev);
+ neigh_parms_data_state_setall(in_dev->arp_parms);
if (ifa->ifa_dev != in_dev) {
WARN_ON(ifa->ifa_dev);
in_dev_hold(in_dev);
@@ -747,6 +748,7 @@ static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
goto errout;
ipv4_devconf_setall(in_dev);
+ neigh_parms_data_state_setall(in_dev->arp_parms);
in_dev_hold(in_dev);
if (tb[IFA_ADDRESS] == NULL)
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 62212c772a4b..421a24934ffd 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -425,6 +425,7 @@ struct net_device *ipmr_new_tunnel(struct net *net, struct vifctl *v)
goto failure;
ipv4_devconf_setall(in_dev);
+ neigh_parms_data_state_setall(in_dev->arp_parms);
IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0;
if (dev_open(dev))
@@ -517,6 +518,7 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
}
ipv4_devconf_setall(in_dev);
+ neigh_parms_data_state_setall(in_dev->arp_parms);
IPV4_DEVCONF(in_dev->cnf, RP_FILTER) = 0;
rcu_read_unlock();
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-05 01:53:05 +0000