diff options
Diffstat (limited to 'net')
-rw-r--r-- | net/tipc/bearer.h | 2 | ||||
-rw-r--r-- | net/tipc/eth_media.c | 55 | ||||
-rw-r--r-- | net/tipc/ib_media.c | 54 |
3 files changed, 65 insertions, 46 deletions
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index e50266a..91b8d8b 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -105,6 +105,7 @@ struct tipc_media { /** * struct tipc_bearer - Generic TIPC bearer structure + * @dev: ptr to associated network device * @usr_handle: pointer to additional media-specific information about bearer * @mtu: max packet size bearer can support * @lock: spinlock for controlling access to bearer @@ -127,6 +128,7 @@ struct tipc_media { * care of initializing all other fields. */ struct tipc_bearer { + struct net_device *dev; void *usr_handle; /* initalized by media */ u32 mtu; /* initalized by media */ struct tipc_media_addr addr; /* initalized by media */ diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index 37fb145..c5f685d 100644 --- a/net/tipc/eth_media.c +++ b/net/tipc/eth_media.c @@ -63,6 +63,9 @@ static int eth_started; static int recv_notification(struct notifier_block *nb, unsigned long evt, void *dv); +static int recv_msg(struct sk_buff *buf, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev); + /* * Network device notifier info */ @@ -71,6 +74,11 @@ static struct notifier_block notifier = { .priority = 0 }; +static struct packet_type tipc_packet_type __read_mostly = { + .type = __constant_htons(ETH_P_TIPC), + .func = recv_msg, +}; + /** * eth_media_addr_set - initialize Ethernet media address structure * @@ -128,20 +136,25 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, static int recv_msg(struct sk_buff *buf, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - struct eth_media *eb_ptr = (struct eth_media *)pt->af_packet_priv; + struct tipc_bearer *b_ptr; if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); return NET_RX_DROP; } - if (likely(eb_ptr->bearer)) { + rcu_read_lock(); + b_ptr = rcu_dereference(dev->tipc_ptr); + if (likely(b_ptr)) { if (likely(buf->pkt_type <= PACKET_BROADCAST)) { buf->next = NULL; - tipc_recv_msg(buf, eb_ptr->bearer); + tipc_recv_msg(buf, b_ptr); + rcu_read_unlock(); return NET_RX_SUCCESS; } } + rcu_read_unlock(); + kfree_skb(buf); return NET_RX_DROP; } @@ -151,10 +164,7 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, */ static void setup_media(struct work_struct *work) { - struct eth_media *eb_ptr = - container_of(work, struct eth_media, setup); - - dev_add_pack(&eb_ptr->tipc_packet_type); + dev_add_pack(&tipc_packet_type); } /** @@ -183,15 +193,11 @@ static int enable_media(struct tipc_bearer *tb_ptr) /* Create Ethernet bearer for device */ eb_ptr->dev = dev; - eb_ptr->tipc_packet_type.type = htons(ETH_P_TIPC); - eb_ptr->tipc_packet_type.dev = dev; - eb_ptr->tipc_packet_type.func = recv_msg; - eb_ptr->tipc_packet_type.af_packet_priv = eb_ptr; - INIT_LIST_HEAD(&(eb_ptr->tipc_packet_type.list)); INIT_WORK(&eb_ptr->setup, setup_media); schedule_work(&eb_ptr->setup); /* Associate TIPC bearer with Ethernet bearer */ + tb_ptr->dev = dev; eb_ptr->bearer = tb_ptr; tb_ptr->usr_handle = (void *)eb_ptr; memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value)); @@ -200,6 +206,7 @@ static int enable_media(struct tipc_bearer *tb_ptr) tb_ptr->bcast_addr.broadcast = 1; tb_ptr->mtu = dev->mtu; eth_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr); + rcu_assign_pointer(dev->tipc_ptr, tb_ptr); return 0; } @@ -213,7 +220,7 @@ static void cleanup_media(struct work_struct *work) struct eth_media *eb_ptr = container_of(work, struct eth_media, cleanup); - dev_remove_pack(&eb_ptr->tipc_packet_type); + dev_remove_pack(&tipc_packet_type); dev_put(eb_ptr->dev); eb_ptr->dev = NULL; } @@ -232,6 +239,7 @@ static void disable_media(struct tipc_bearer *tb_ptr) eb_ptr->bearer = NULL; INIT_WORK(&eb_ptr->cleanup, cleanup_media); schedule_work(&eb_ptr->cleanup); + RCU_INIT_POINTER(tb_ptr->dev->tipc_ptr, NULL); } /** @@ -243,21 +251,20 @@ static void disable_media(struct tipc_bearer *tb_ptr) static int recv_notification(struct notifier_block *nb, unsigned long evt, void *ptr) { + struct tipc_bearer *b_ptr; struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct eth_media *eb_ptr = ð_media_array[0]; - struct eth_media *stop = ð_media_array[MAX_ETH_MEDIA]; if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; - while ((eb_ptr->dev != dev)) { - if (++eb_ptr == stop) - return NOTIFY_DONE; /* couldn't find device */ - } - if (!eb_ptr->bearer) + rcu_read_lock(); + b_ptr = rcu_dereference(dev->tipc_ptr); + if (!b_ptr) { + rcu_read_unlock(); return NOTIFY_DONE; /* bearer had been disabled */ + } - eb_ptr->bearer->mtu = dev->mtu; + b_ptr->mtu = dev->mtu; switch (evt) { case NETDEV_CHANGE: @@ -266,13 +273,15 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, case NETDEV_DOWN: case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: - tipc_reset_bearer(eb_ptr->bearer); + tipc_reset_bearer(b_ptr); break; case NETDEV_UNREGISTER: case NETDEV_CHANGENAME: - tipc_disable_bearer(eb_ptr->bearer->name); + tipc_disable_bearer(b_ptr->name); break; } + rcu_read_unlock(); + return NOTIFY_OK; } diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c index 48e1c07..9fdf03c 100644 --- a/net/tipc/ib_media.c +++ b/net/tipc/ib_media.c @@ -62,6 +62,13 @@ struct ib_media { static struct ib_media ib_media_array[MAX_IB_MEDIA]; static int ib_started; +static int recv_msg(struct sk_buff *buf, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev); + +static struct packet_type tipc_packet_type __read_mostly = { + .type = __constant_htons(ETH_P_TIPC), + .func = recv_msg, +}; /** * ib_media_addr_set - initialize Infiniband media address structure @@ -120,20 +127,25 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, static int recv_msg(struct sk_buff *buf, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - struct ib_media *ib_ptr = (struct ib_media *)pt->af_packet_priv; + struct tipc_bearer *b_ptr; if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); return NET_RX_DROP; } - if (likely(ib_ptr->bearer)) { + rcu_read_lock(); + b_ptr = rcu_dereference(dev->tipc_ptr); + if (likely(b_ptr)) { if (likely(buf->pkt_type <= PACKET_BROADCAST)) { buf->next = NULL; - tipc_recv_msg(buf, ib_ptr->bearer); + tipc_recv_msg(buf, b_ptr); + rcu_read_unlock(); return NET_RX_SUCCESS; } } + rcu_read_unlock(); + kfree_skb(buf); return NET_RX_DROP; } @@ -143,10 +155,7 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, */ static void setup_media(struct work_struct *work) { - struct ib_media *ib_ptr = - container_of(work, struct ib_media, setup); - - dev_add_pack(&ib_ptr->tipc_packet_type); + dev_add_pack(&tipc_packet_type); } /** @@ -175,15 +184,11 @@ static int enable_media(struct tipc_bearer *tb_ptr) /* Create InfiniBand bearer for device */ ib_ptr->dev = dev; - ib_ptr->tipc_packet_type.type = htons(ETH_P_TIPC); - ib_ptr->tipc_packet_type.dev = dev; - ib_ptr->tipc_packet_type.func = recv_msg; - ib_ptr->tipc_packet_type.af_packet_priv = ib_ptr; - INIT_LIST_HEAD(&(ib_ptr->tipc_packet_type.list)); INIT_WORK(&ib_ptr->setup, setup_media); schedule_work(&ib_ptr->setup); /* Associate TIPC bearer with InfiniBand bearer */ + tb_ptr->dev = dev; ib_ptr->bearer = tb_ptr; tb_ptr->usr_handle = (void *)ib_ptr; memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value)); @@ -192,6 +197,7 @@ static int enable_media(struct tipc_bearer *tb_ptr) tb_ptr->bcast_addr.broadcast = 1; tb_ptr->mtu = dev->mtu; ib_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr); + rcu_assign_pointer(dev->tipc_ptr, tb_ptr); return 0; } @@ -205,7 +211,7 @@ static void cleanup_bearer(struct work_struct *work) struct ib_media *ib_ptr = container_of(work, struct ib_media, cleanup); - dev_remove_pack(&ib_ptr->tipc_packet_type); + dev_remove_pack(&tipc_packet_type); dev_put(ib_ptr->dev); ib_ptr->dev = NULL; } @@ -224,6 +230,7 @@ static void disable_media(struct tipc_bearer *tb_ptr) ib_ptr->bearer = NULL; INIT_WORK(&ib_ptr->cleanup, cleanup_bearer); schedule_work(&ib_ptr->cleanup); + RCU_INIT_POINTER(tb_ptr->dev->tipc_ptr, NULL); } /** @@ -235,21 +242,20 @@ static void disable_media(struct tipc_bearer *tb_ptr) static int recv_notification(struct notifier_block *nb, unsigned long evt, void *ptr) { + struct tipc_bearer *b_ptr; struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct ib_media *ib_ptr = &ib_media_array[0]; - struct ib_media *stop = &ib_media_array[MAX_IB_MEDIA]; if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; - while ((ib_ptr->dev != dev)) { - if (++ib_ptr == stop) - return NOTIFY_DONE; /* couldn't find device */ - } - if (!ib_ptr->bearer) + rcu_read_lock(); + b_ptr = rcu_dereference(dev->tipc_ptr); + if (!b_ptr) { + rcu_read_unlock(); return NOTIFY_DONE; /* bearer had been disabled */ + } - ib_ptr->bearer->mtu = dev->mtu; + b_ptr->mtu = dev->mtu; switch (evt) { case NETDEV_CHANGE: @@ -258,13 +264,15 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, case NETDEV_DOWN: case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: - tipc_reset_bearer(ib_ptr->bearer); + tipc_reset_bearer(b_ptr); break; case NETDEV_UNREGISTER: case NETDEV_CHANGENAME: - tipc_disable_bearer(ib_ptr->bearer->name); + tipc_disable_bearer(b_ptr->name); break; } + rcu_read_unlock(); + return NOTIFY_OK; } |