diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/neighbour.c | 74 | ||||
| -rw-r--r-- | net/ipv4/devinet.c | 2 | ||||
| -rw-r--r-- | net/ipv4/ipmr.c | 2 |
3 files changed, 72 insertions, 6 deletions
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(); 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