diff options
Diffstat (limited to 'net/hsr')
| -rw-r--r-- | net/hsr/hsr_device.c | 192 | ||||
| -rw-r--r-- | net/hsr/hsr_framereg.c | 6 | ||||
| -rw-r--r-- | net/hsr/hsr_main.c | 24 | ||||
| -rw-r--r-- | net/hsr/hsr_netlink.c | 53 | ||||
| -rw-r--r-- | net/hsr/hsr_slave.c | 91 | ||||
| -rw-r--r-- | net/hsr/hsr_slave.h | 3 |
6 files changed, 205 insertions, 164 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index 8936b3c..1f8869c 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -15,7 +15,6 @@ #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/etherdevice.h> -#include <linux/if_arp.h> #include <linux/rtnetlink.h> #include <linux/pkt_sched.h> #include "hsr_device.h" @@ -108,23 +107,27 @@ void hsr_check_carrier_and_operstate(struct hsr_priv *hsr) hsr_check_announce(hsr->dev, old_operstate); } - int hsr_get_max_mtu(struct hsr_priv *hsr) { - int mtu_max; - - if (hsr->slave[0] && hsr->slave[1]) - mtu_max = min(hsr->slave[0]->mtu, hsr->slave[1]->mtu); - else if (hsr->slave[0]) - mtu_max = hsr->slave[0]->mtu; - else if (hsr->slave[1]) - mtu_max = hsr->slave[1]->mtu; - else - mtu_max = HSR_HLEN; - + unsigned int mtu_max; + struct net_device *slave; + + mtu_max = ETH_DATA_LEN; + rcu_read_lock(); + slave = hsr->slave[0]; + if (slave) + mtu_max = min(slave->mtu, mtu_max); + slave = hsr->slave[1]; + if (slave) + mtu_max = min(slave->mtu, mtu_max); + rcu_read_unlock(); + + if (mtu_max < HSR_HLEN) + return 0; return mtu_max - HSR_HLEN; } + static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu) { struct hsr_priv *hsr; @@ -145,18 +148,20 @@ static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu) static int hsr_dev_open(struct net_device *dev) { struct hsr_priv *hsr; + struct net_device *slave; int i; char *slave_name; hsr = netdev_priv(dev); for (i = 0; i < HSR_MAX_SLAVE; i++) { - if (hsr->slave[i]) - slave_name = hsr->slave[i]->name; + slave = hsr->slave[i]; + if (slave) + slave_name = slave->name; else slave_name = "null"; - if (!is_slave_up(hsr->slave[i])) + if (!is_slave_up(slave)) netdev_warn(dev, "Slave %c (%s) is not up; please bring it up to get a working HSR network\n", 'A' + i, slave_name); } @@ -223,6 +228,8 @@ static int slave_xmit(struct sk_buff *skb, struct hsr_priv *hsr, hsr_ethhdr = (struct hsr_ethhdr *) skb->data; skb->dev = hsr->slave[dev_idx]; + if (unlikely(!skb->dev)) + return NET_XMIT_DROP; hsr_addr_subst_dest(hsr, &hsr_ethhdr->ethhdr, dev_idx); @@ -252,14 +259,8 @@ static int hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev) } skb2 = pskb_copy(skb, GFP_ATOMIC); - - res1 = NET_XMIT_DROP; - if (likely(hsr->slave[HSR_DEV_SLAVE_A])) - res1 = slave_xmit(skb, hsr, HSR_DEV_SLAVE_A); - - res2 = NET_XMIT_DROP; - if (likely(skb2 && hsr->slave[HSR_DEV_SLAVE_B])) - res2 = slave_xmit(skb2, hsr, HSR_DEV_SLAVE_B); + res1 = slave_xmit(skb, hsr, HSR_DEV_SLAVE_A); + res2 = slave_xmit(skb2, hsr, HSR_DEV_SLAVE_B); if (likely(res1 == NET_XMIT_SUCCESS || res1 == NET_XMIT_CN || res2 == NET_XMIT_SUCCESS || res2 == NET_XMIT_CN)) { @@ -406,28 +407,10 @@ static void hsr_announce(unsigned long data) static void restore_slaves(struct net_device *hsr_dev) { struct hsr_priv *hsr; - int i; - int res; hsr = netdev_priv(hsr_dev); - - rtnl_lock(); - - for (i = 0; i < HSR_MAX_SLAVE; i++) { - if (!hsr->slave[i]) - continue; - res = dev_set_promiscuity(hsr->slave[i], -1); - if (res) - netdev_info(hsr_dev, - "Cannot restore slave promiscuity (%s, %d)\n", - hsr->slave[i]->name, res); - - if (hsr->slave[i]->rx_handler == hsr_handle_frame) - netdev_rx_handler_unregister(hsr->slave[i]); - } - - - rtnl_unlock(); + hsr_del_slave(hsr, 1); + hsr_del_slave(hsr, 0); } static void reclaim_hsr_dev(struct rcu_head *rh) @@ -483,38 +466,6 @@ bool is_hsr_master(struct net_device *dev) return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); } -static int check_slave_ok(struct net_device *dev) -{ - /* Don't allow HSR on non-ethernet like devices */ - if ((dev->flags & IFF_LOOPBACK) || (dev->type != ARPHRD_ETHER) || - (dev->addr_len != ETH_ALEN)) { - netdev_info(dev, "Cannot use loopback or non-ethernet device as HSR slave.\n"); - return -EINVAL; - } - - /* Don't allow enslaving hsr devices */ - if (is_hsr_master(dev)) { - netdev_info(dev, "Cannot create trees of HSR devices.\n"); - return -EINVAL; - } - - if (is_hsr_slave(dev)) { - netdev_info(dev, "This device is already a HSR slave.\n"); - return -EINVAL; - } - - if (dev->priv_flags & IFF_802_1Q_VLAN) { - netdev_info(dev, "HSR on top of VLAN is not yet supported in this driver.\n"); - return -EINVAL; - } - - /* HSR over bonded devices has not been tested, but I'm not sure it - * won't work... - */ - - return 0; -} - /* Default multicast address for HSR Supervision frames */ static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { @@ -525,15 +476,30 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], unsigned char multicast_spec) { struct hsr_priv *hsr; - int i; int res; hsr = netdev_priv(hsr_dev); hsr->dev = hsr_dev; + hsr->slave[0] = NULL; + hsr->slave[1] = NULL; INIT_LIST_HEAD(&hsr->node_db); INIT_LIST_HEAD(&hsr->self_node_db); - for (i = 0; i < HSR_MAX_SLAVE; i++) - hsr->slave[i] = slave[i]; + + ether_addr_copy(hsr_dev->dev_addr, slave[0]->dev_addr); + + /* Make sure we recognize frames from ourselves in hsr_rcv() */ + res = hsr_create_self_node(&hsr->self_node_db, hsr_dev->dev_addr, + slave[1]->dev_addr); + if (res < 0) + return res; + + hsr_dev->features = slave[0]->features & slave[1]->features; + /* Prevent recursive tx locking */ + hsr_dev->features |= NETIF_F_LLTX; + /* VLAN on top of HSR needs testing and probably some work on + * hsr_header_create() etc. + */ + hsr_dev->features |= NETIF_F_VLAN_CHALLENGED; spin_lock_init(&hsr->seqnr_lock); /* Overflow soon to find bugs easier: */ @@ -560,65 +526,21 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], * IFF_HSR_MASTER/SLAVE? */ - for (i = 0; i < HSR_MAX_SLAVE; i++) { - res = check_slave_ok(slave[i]); - if (res) - return res; - } - - hsr_dev->features = slave[0]->features & slave[1]->features; - /* Prevent recursive tx locking */ - hsr_dev->features |= NETIF_F_LLTX; - /* VLAN on top of HSR needs testing and probably some work on - * hsr_header_create() etc. - */ - hsr_dev->features |= NETIF_F_VLAN_CHALLENGED; - - /* Set hsr_dev's MAC address to that of mac_slave1 */ - ether_addr_copy(hsr_dev->dev_addr, hsr->slave[0]->dev_addr); - - /* Set required header length */ - for (i = 0; i < HSR_MAX_SLAVE; i++) { - if (slave[i]->hard_header_len + HSR_HLEN > - hsr_dev->hard_header_len) - hsr_dev->hard_header_len = - slave[i]->hard_header_len + HSR_HLEN; - } - - /* MTU */ - for (i = 0; i < HSR_MAX_SLAVE; i++) - if (slave[i]->mtu - HSR_HLEN < hsr_dev->mtu) - hsr_dev->mtu = slave[i]->mtu - HSR_HLEN; - /* Make sure the 1st call to netif_carrier_on() gets through */ netif_carrier_off(hsr_dev); - /* Promiscuity */ - for (i = 0; i < HSR_MAX_SLAVE; i++) { - res = dev_set_promiscuity(slave[i], 1); - if (res) { - netdev_info(hsr_dev, "Cannot set slave promiscuity (%s, %d)\n", - slave[i]->name, res); - goto fail; - } - } - - for (i = 0; i < HSR_MAX_SLAVE; i++) { - res = netdev_rx_handler_register(slave[i], hsr_handle_frame, - hsr); - if (res) - goto fail; - } - - /* Make sure we recognize frames from ourselves in hsr_rcv() */ - res = hsr_create_self_node(&hsr->self_node_db, hsr_dev->dev_addr, - hsr->slave[1]->dev_addr); - if (res < 0) - goto fail; - res = register_netdevice(hsr_dev); if (res) - goto fail; + return res; + + res = hsr_add_slave(hsr, slave[0], 0); + if (res) + return res; + res = hsr_add_slave(hsr, slave[1], 1); + if (res) { + hsr_del_slave(hsr, 0); + return res; + } hsr->prune_timer.expires = jiffies + msecs_to_jiffies(PRUNE_PERIOD); add_timer(&hsr->prune_timer); @@ -626,8 +548,4 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], register_hsr_master(hsr); return 0; - -fail: - restore_slaves(hsr_dev); - return res; } diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 79e3f7f..3666f94 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -455,6 +455,7 @@ int hsr_get_node_data(struct hsr_priv *hsr, u16 *if2_seq) { struct hsr_node *node; + struct net_device *slave; unsigned long tdiff; @@ -491,8 +492,9 @@ int hsr_get_node_data(struct hsr_priv *hsr, *if1_seq = node->seq_out[HSR_DEV_SLAVE_B]; *if2_seq = node->seq_out[HSR_DEV_SLAVE_A]; - if ((node->AddrB_if != HSR_DEV_NONE) && hsr->slave[node->AddrB_if]) - *addr_b_ifindex = hsr->slave[node->AddrB_if]->ifindex; + slave = hsr->slave[node->AddrB_if]; + if ((node->AddrB_if != HSR_DEV_NONE) && slave) + *addr_b_ifindex = slave->ifindex; else *addr_b_ifindex = -1; diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c index 431b528..b5abe26 100644 --- a/net/hsr/hsr_main.c +++ b/net/hsr/hsr_main.c @@ -17,6 +17,7 @@ #include "hsr_device.h" #include "hsr_netlink.h" #include "hsr_framereg.h" +#include "hsr_slave.h" /* List of all registered virtual HSR devices */ @@ -124,22 +125,21 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event, if (dev == hsr->dev) break; - if (dev == hsr->slave[0]) - ether_addr_copy(hsr->dev->dev_addr, - hsr->slave[0]->dev_addr); + if (dev == hsr->slave[0]) { + ether_addr_copy(hsr->dev->dev_addr, dev->dev_addr); + call_netdevice_notifiers(NETDEV_CHANGEADDR, hsr->dev); + } /* Make sure we recognize frames from ourselves in hsr_rcv() */ + other_slave = hsr->slave[1]; res = hsr_create_self_node(&hsr->self_node_db, hsr->dev->dev_addr, - hsr->slave[1] ? - hsr->slave[1]->dev_addr : + other_slave ? + other_slave->dev_addr : hsr->dev->dev_addr); if (res) netdev_warn(hsr->dev, "Could not update HSR node address.\n"); - - if (dev == hsr->slave[0]) - call_netdevice_notifiers(NETDEV_CHANGEADDR, hsr->dev); break; case NETDEV_CHANGEMTU: if (dev == hsr->dev) @@ -149,10 +149,14 @@ static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event, dev_set_mtu(hsr->dev, mtu_max); break; case NETDEV_UNREGISTER: - if (dev == hsr->slave[0]) + if (dev == hsr->slave[0]) { hsr->slave[0] = NULL; - if (dev == hsr->slave[1]) + hsr_del_slave(hsr, 0); + } + if (dev == hsr->slave[1]) { hsr->slave[1] = NULL; + hsr_del_slave(hsr, 1); + } /* There should really be a way to set a new slave device... */ diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c index bea250e..a2ce359 100644 --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -64,16 +64,28 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev, static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct hsr_priv *hsr; + struct net_device *slave; + int res; hsr = netdev_priv(dev); - if (hsr->slave[0]) - if (nla_put_u32(skb, IFLA_HSR_SLAVE1, hsr->slave[0]->ifindex)) - goto nla_put_failure; + res = 0; - if (hsr->slave[1]) - if (nla_put_u32(skb, IFLA_HSR_SLAVE2, hsr->slave[1]->ifindex)) - goto nla_put_failure; + rcu_read_lock(); + slave = hsr->slave[0]; + if (slave) + res = nla_put_u32(skb, IFLA_HSR_SLAVE1, slave->ifindex); + rcu_read_unlock(); + if (res) + goto nla_put_failure; + + rcu_read_lock(); + slave = hsr->slave[1]; + if (slave) + res = nla_put_u32(skb, IFLA_HSR_SLAVE2, slave->ifindex); + rcu_read_unlock(); + if (res) + goto nla_put_failure; if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN, hsr->sup_multicast_addr) || @@ -132,6 +144,7 @@ void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], enum hsr_dev_idx dev_idx) { struct sk_buff *skb; + struct net_device *slave; void *msg_head; int res; int ifindex; @@ -148,10 +161,14 @@ void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], if (res < 0) goto nla_put_failure; - if (hsr->slave[dev_idx]) - ifindex = hsr->slave[dev_idx]->ifindex; + rcu_read_lock(); + slave = hsr->slave[dev_idx]; + if (slave) + ifindex = slave->ifindex; else ifindex = -1; + rcu_read_unlock(); + res = nla_put_u32(skb, HSR_A_IFINDEX, ifindex); if (res < 0) goto nla_put_failure; @@ -215,7 +232,7 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) { /* For receiving */ struct nlattr *na; - struct net_device *hsr_dev; + struct net_device *hsr_dev, *slave; /* For sending */ struct sk_buff *skb_out; @@ -301,9 +318,11 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq); if (res < 0) goto nla_put_failure; - if (hsr->slave[0]) - res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, - hsr->slave[0]->ifindex); + rcu_read_lock(); + slave = hsr->slave[0]; + if (slave) + res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, slave->ifindex); + rcu_read_unlock(); if (res < 0) goto nla_put_failure; @@ -313,9 +332,13 @@ static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq); if (res < 0) goto nla_put_failure; - if (hsr->slave[1]) - res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, - hsr->slave[1]->ifindex); + rcu_read_lock(); + slave = hsr->slave[1]; + if (slave) + res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, slave->ifindex); + rcu_read_unlock(); + if (res < 0) + goto nla_put_failure; genlmsg_end(skb_out, msg_head); genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c index 7028146..d676090 100644 --- a/net/hsr/hsr_slave.c +++ b/net/hsr/hsr_slave.c @@ -11,10 +11,45 @@ #include "hsr_slave.h" #include <linux/etherdevice.h> +#include <linux/if_arp.h> #include "hsr_main.h" +#include "hsr_device.h" #include "hsr_framereg.h" +static int check_slave_ok(struct net_device *dev) +{ + /* Don't allow HSR on non-ethernet like devices */ + if ((dev->flags & IFF_LOOPBACK) || (dev->type != ARPHRD_ETHER) || + (dev->addr_len != ETH_ALEN)) { + netdev_info(dev, "Cannot use loopback or non-ethernet device as HSR slave.\n"); + return -EINVAL; + } + + /* Don't allow enslaving hsr devices */ + if (is_hsr_master(dev)) { + netdev_info(dev, "Cannot create trees of HSR devices.\n"); + return -EINVAL; + } + + if (is_hsr_slave(dev)) { + netdev_info(dev, "This device is already a HSR slave.\n"); + return -EINVAL; + } + + if (dev->priv_flags & IFF_802_1Q_VLAN) { + netdev_info(dev, "HSR on top of VLAN is not yet supported in this driver.\n"); + return -EINVAL; + } + + /* HSR over bonded devices has not been tested, but I'm not sure it + * won't work... + */ + + return 0; +} + + static struct sk_buff *hsr_pull_tag(struct sk_buff *skb) { struct hsr_tag *hsr_tag; @@ -241,3 +276,59 @@ forward: return RX_HANDLER_CONSUMED; } + +int hsr_add_slave(struct hsr_priv *hsr, struct net_device *dev, int idx) +{ + int res; + + dev_hold(dev); + + res = check_slave_ok(dev); + if (res) + goto fail; + + res = dev_set_promiscuity(dev, 1); + if (res) + goto fail; + + res = netdev_rx_handler_register(dev, hsr_handle_frame, hsr); + if (res) + goto fail_rx_handler; + + + hsr->slave[idx] = dev; + + /* Set required header length */ + if (dev->hard_header_len + HSR_HLEN > hsr->dev->hard_header_len) + hsr->dev->hard_header_len = dev->hard_header_len + HSR_HLEN; + + dev_set_mtu(hsr->dev, hsr_get_max_mtu(hsr)); + + return 0; + +fail_rx_handler: + dev_set_promiscuity(dev, -1); + +fail: + dev_put(dev); + return res; +} + +void hsr_del_slave(struct hsr_priv *hsr, int idx) +{ + struct net_device *slave; + + slave = hsr->slave[idx]; + hsr->slave[idx] = NULL; + + netdev_update_features(hsr->dev); + dev_set_mtu(hsr->dev, hsr_get_max_mtu(hsr)); + + if (slave) { + netdev_rx_handler_unregister(slave); + dev_set_promiscuity(slave, -1); + } + + synchronize_rcu(); + dev_put(slave); +} diff --git a/net/hsr/hsr_slave.h b/net/hsr/hsr_slave.h index ae90c8d..03c15fd 100644 --- a/net/hsr/hsr_slave.h +++ b/net/hsr/hsr_slave.h @@ -14,7 +14,10 @@ #include <linux/skbuff.h> #include <linux/netdevice.h> +#include "hsr_main.h" +int hsr_add_slave(struct hsr_priv *hsr, struct net_device *dev, int idx); +void hsr_del_slave(struct hsr_priv *hsr, int idx); rx_handler_result_t hsr_handle_frame(struct sk_buff **pskb); #endif /* __HSR_SLAVE_H */ |
