diff options
Diffstat (limited to 'net/bridge/br_if.c')
| -rw-r--r-- | net/bridge/br_if.c | 61 |
1 files changed, 45 insertions, 16 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index defcf6a8607..ba442883e87 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -20,6 +20,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/rtnetlink.h> +#include <linux/if_ether.h> #include <net/sock.h> #include "br_private.h" @@ -32,9 +33,8 @@ * ethtool, use ethtool_ops. Also, since driver might sleep need to * not be holding any locks. */ -static int br_initial_port_cost(struct net_device *dev) +static int port_cost(struct net_device *dev) { - struct ethtool_cmd ecmd = { ETHTOOL_GSET }; struct ifreq ifr; mm_segment_t old_fs; @@ -58,10 +58,6 @@ static int br_initial_port_cost(struct net_device *dev) return 2; case SPEED_10: return 100; - default: - pr_info("bridge: can't decode speed from %s: %d\n", - dev->name, ecmd.speed); - return 100; } } @@ -75,6 +71,35 @@ static int br_initial_port_cost(struct net_device *dev) return 100; /* assume old 10Mbps */ } + +/* + * Check for port carrier transistions. + * Called from work queue to allow for calling functions that + * might sleep (such as speed check), and to debounce. + */ +static void port_carrier_check(void *arg) +{ + struct net_bridge_port *p = arg; + + rtnl_lock(); + if (netif_carrier_ok(p->dev)) { + u32 cost = port_cost(p->dev); + + spin_lock_bh(&p->br->lock); + if (p->state == BR_STATE_DISABLED) { + p->path_cost = cost; + br_stp_enable_port(p); + } + spin_unlock_bh(&p->br->lock); + } else { + spin_lock_bh(&p->br->lock); + if (p->state != BR_STATE_DISABLED) + br_stp_disable_port(p); + spin_unlock_bh(&p->br->lock); + } + rtnl_unlock(); +} + static void destroy_nbp(struct net_bridge_port *p) { struct net_device *dev = p->dev; @@ -102,6 +127,9 @@ static void del_nbp(struct net_bridge_port *p) dev->br_port = NULL; dev_set_promiscuity(dev, -1); + cancel_delayed_work(&p->carrier_check); + flush_scheduled_work(); + spin_lock_bh(&br->lock); br_stp_disable_port(p); spin_unlock_bh(&br->lock); @@ -155,6 +183,7 @@ static struct net_device *new_bridge_dev(const char *name) br->bridge_id.prio[1] = 0x00; memset(br->bridge_id.addr, 0, ETH_ALEN); + br->feature_mask = dev->features; br->stp_enabled = 0; br->designated_root = br->bridge_id; br->root_path_cost = 0; @@ -195,10 +224,9 @@ static int find_portno(struct net_bridge *br) return (index >= BR_MAX_PORTS) ? -EXFULL : index; } -/* called with RTNL */ +/* called with RTNL but without bridge lock */ static struct net_bridge_port *new_nbp(struct net_bridge *br, - struct net_device *dev, - unsigned long cost) + struct net_device *dev) { int index; struct net_bridge_port *p; @@ -215,12 +243,13 @@ static struct net_bridge_port *new_nbp(struct net_bridge *br, p->br = br; dev_hold(dev); p->dev = dev; - p->path_cost = cost; + p->path_cost = port_cost(dev); p->priority = 0x8000 >> BR_PORT_BITS; dev->br_port = p; p->port_no = index; br_init_port(p); p->state = BR_STATE_DISABLED; + INIT_WORK(&p->carrier_check, port_carrier_check, p); kobject_init(&p->kobj); return p; @@ -295,7 +324,7 @@ int br_del_bridge(const char *name) return ret; } -/* Mtu of the bridge pseudo-device 1500 or the minimum of the ports */ +/* MTU of the bridge pseudo-device: ETH_DATA_LEN or the minimum of the ports */ int br_min_mtu(const struct net_bridge *br) { const struct net_bridge_port *p; @@ -304,7 +333,7 @@ int br_min_mtu(const struct net_bridge *br) ASSERT_RTNL(); if (list_empty(&br->port_list)) - mtu = 1500; + mtu = ETH_DATA_LEN; else { list_for_each_entry(p, &br->port_list, list) { if (!mtu || p->dev->mtu < mtu) @@ -322,9 +351,8 @@ void br_features_recompute(struct net_bridge *br) struct net_bridge_port *p; unsigned long features, checksum; - features = NETIF_F_SG | NETIF_F_FRAGLIST - | NETIF_F_HIGHDMA | NETIF_F_TSO; - checksum = NETIF_F_IP_CSUM; /* least commmon subset */ + features = br->feature_mask &~ NETIF_F_IP_CSUM; + checksum = br->feature_mask & NETIF_F_IP_CSUM; list_for_each_entry(p, &br->port_list, list) { if (!(p->dev->features @@ -351,7 +379,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) if (dev->br_port != NULL) return -EBUSY; - if (IS_ERR(p = new_nbp(br, dev, br_initial_port_cost(dev)))) + if (IS_ERR(p = new_nbp(br, dev))) return PTR_ERR(p); if ((err = br_fdb_insert(br, p, dev->dev_addr))) @@ -366,6 +394,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) spin_lock_bh(&br->lock); br_stp_recalculate_bridge_id(br); + br_features_recompute(br); if ((br->dev->flags & IFF_UP) && (dev->flags & IFF_UP) && netif_carrier_ok(dev)) br_stp_enable_port(p); |