diff options
| -rw-r--r-- | net/bridge/br_multicast.c | 41 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 1 | ||||
| -rw-r--r-- | net/bridge/br_sysfs_br.c | 39 |
3 files changed, 81 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index c7a1095ed84..2559fb53983 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -15,6 +15,7 @@ #include <linux/igmp.h> #include <linux/jhash.h> #include <linux/kernel.h> +#include <linux/log2.h> #include <linux/netdevice.h> #include <linux/netfilter_bridge.h> #include <linux/random.h> @@ -1261,3 +1262,43 @@ unlock: return err; } + +int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val) +{ + int err = -ENOENT; + u32 old; + + spin_lock(&br->multicast_lock); + if (!netif_running(br->dev)) + goto unlock; + + err = -EINVAL; + if (!is_power_of_2(val)) + goto unlock; + if (br->mdb && val < br->mdb->size) + goto unlock; + + err = 0; + + old = br->hash_max; + br->hash_max = val; + + if (br->mdb) { + if (br->mdb->old) { + err = -EEXIST; +rollback: + br->hash_max = old; + goto unlock; + } + + err = br_mdb_rehash(&br->mdb, br->hash_max, + br->hash_elasticity); + if (err) + goto rollback; + } + +unlock: + spin_unlock(&br->multicast_lock); + + return err; +} diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index bf162fa6b23..9191198c4f1 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -301,6 +301,7 @@ extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); extern int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); +extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); #else static inline int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c index 0ab288332fc..d2ee53b3ad7 100644 --- a/net/bridge/br_sysfs_br.c +++ b/net/bridge/br_sysfs_br.c @@ -378,6 +378,43 @@ static ssize_t store_multicast_snooping(struct device *d, } static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR, show_multicast_snooping, store_multicast_snooping); + +static ssize_t show_hash_elasticity(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct net_bridge *br = to_bridge(d); + return sprintf(buf, "%u\n", br->hash_elasticity); +} + +static int set_elasticity(struct net_bridge *br, unsigned long val) +{ + br->hash_elasticity = val; + return 0; +} + +static ssize_t store_hash_elasticity(struct device *d, + struct device_attribute *attr, + const char *buf, size_t len) +{ + return store_bridge_parm(d, buf, len, set_elasticity); +} +static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity, + store_hash_elasticity); + +static ssize_t show_hash_max(struct device *d, struct device_attribute *attr, + char *buf) +{ + struct net_bridge *br = to_bridge(d); + return sprintf(buf, "%u\n", br->hash_max); +} + +static ssize_t store_hash_max(struct device *d, struct device_attribute *attr, + const char *buf, size_t len) +{ + return store_bridge_parm(d, buf, len, br_multicast_set_hash_max); +} +static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max, + store_hash_max); #endif static struct attribute *bridge_attrs[] = { @@ -402,6 +439,8 @@ static struct attribute *bridge_attrs[] = { #ifdef CONFIG_BRIDGE_IGMP_SNOOPING &dev_attr_multicast_router.attr, &dev_attr_multicast_snooping.attr, + &dev_attr_hash_elasticity.attr, + &dev_attr_hash_max.attr, #endif NULL }; |