From patchwork Mon Jan 23 23:11:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?=C5=A0tefan_Gula?= X-Patchwork-Id: 137493 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0AE3FB6FA7 for ; Tue, 24 Jan 2012 10:15:23 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754814Ab2AWXPE (ORCPT ); Mon, 23 Jan 2012 18:15:04 -0500 Received: from 5-meo-dmt.ynet.sk ([147.175.167.220]:49243 "EHLO 5-meo-dmt.ynet.sk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754708Ab2AWXPD (ORCPT ); Mon, 23 Jan 2012 18:15:03 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by 5-meo-dmt.ynet.sk (Postfix) with ESMTP id 8AF061360C5; Tue, 24 Jan 2012 00:11:39 +0100 (CET) X-Spam-Flag: NO X-Spam-Score: -2.499 X-Spam-Level: X-Spam-Status: No, score=-2.499 tagged_above=-10 required=5 tests=[BAYES_00=-2.599, RDNS_NONE=0.1] Received: from 5-meo-dmt.ynet.sk ([127.0.0.1]) by localhost (5-meo-dmt.ynet.sk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id C-HkdQF+8LbU; Tue, 24 Jan 2012 00:11:34 +0100 (CET) Received: from 5-meo-dmt.ynet.sk (5-MeO-DMT.ynet.sk [147.175.167.220]) by 5-meo-dmt.ynet.sk (Postfix) with ESMTP id 86F75136079; Tue, 24 Jan 2012 00:11:34 +0100 (CET) Date: Tue, 24 Jan 2012 00:11:34 +0100 (CET) From: Stefan Gula To: Patrick McHardy Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Message-ID: <29378065.3471327360294412.JavaMail.root@5-MeO-DMT.ynet.sk> In-Reply-To: <24656129.3451327360149786.JavaMail.root@5-MeO-DMT.ynet.sk> Subject: [patch v2, kernel version 3.2.1] Source mode for macvlan interface MIME-Version: 1.0 X-Originating-IP: [15.195.185.83] X-Mailer: Zimbra 5.0.8_GA_2462.UBUNTU6 (ZimbraWebClient - FF3.0 (Win)/5.0.8_GA_2462.UBUNTU6) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Stefan Gula New mode of macvlan interface called "source" allows one to specify, which frames are allowed to be received by given macvlan interface. This logic is used only on received frames on underlying interface. The ability to send frames from macvlan interface through underlying interface is not modified. This feature allows one to simulate 802.1x mac based VLAN behavior by using proper netlink message to configure this behavior with utility such as "ip link" from iproute2 suite. This feature allows to create MAC based VLAN associations instead of standard port or tag based, to be able to associate several different clients/users behind one common port based on their MAC addresses. Signed-off-by: Stefan Gula --- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff -uprN -X linux/Documentation/dontdiff linux-3.2.1-orig/drivers/net/macvlan.c linux/drivers/net/macvlan.c --- linux-3.2.1-orig/drivers/net/macvlan.c 2012-01-12 20:42:45.000000000 +0100 +++ linux/drivers/net/macvlan.c 2012-01-23 23:01:45.309136730 +0100 @@ -40,6 +40,7 @@ struct macvlan_port { struct rcu_head rcu; bool passthru; int count; + struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; }; static void macvlan_port_destroy(struct net_device *dev); @@ -155,6 +156,112 @@ static void macvlan_broadcast(struct sk_ } } +struct macvlan_source_list { + struct hlist_node hlist; + struct macvlan_dev *vlan; + unsigned char addr[ETH_ALEN]; + struct rcu_head rcu; +}; + +static struct macvlan_source_list *macvlan_hash_lookup_sources_list( + const struct macvlan_dev *vlan, + const unsigned char *addr) +{ + struct macvlan_source_list *list; + struct hlist_node *n; + + hlist_for_each_entry_rcu(list, n, + &vlan->port->vlan_source_hash[addr[5]], hlist) { + if (!compare_ether_addr_64bits(list->addr, addr) && + list->vlan == vlan) + return list; + } + return NULL; +} + +static void macvlan_hash_add_sources(struct macvlan_dev *vlan, + const unsigned char *addr) +{ + struct macvlan_port *port = vlan->port; + struct macvlan_source_list *list; + + list = macvlan_hash_lookup_sources_list(vlan, addr); + if (!list) { + list = kmalloc(sizeof(*list), GFP_ATOMIC); + if (list) { + memcpy(list->addr, addr, ETH_ALEN); + list->vlan = vlan; + hlist_add_head_rcu(&list->hlist, + &port->vlan_source_hash[addr[5]]); + } + } +} + +static void macvlan_hash_del_sources(struct macvlan_source_list *list) +{ + hlist_del_rcu(&list->hlist); + kfree_rcu(list, rcu); +} + +static void macvlan_flush_sources(struct macvlan_port *port, + struct macvlan_dev *vlan) +{ + int i; + + for (i = 0; i < MACVLAN_HASH_SIZE; i++) { + struct hlist_node *h, *n; + + hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { + struct macvlan_source_list *list + = hlist_entry(h, struct macvlan_source_list, + hlist); + if (list->vlan == vlan) + macvlan_hash_del_sources(list); + } + } +} + +static void macvlan_forward_sources_one(struct sk_buff *skb, + struct macvlan_dev *vlan) +{ + struct sk_buff *nskb; + struct net_device *dev; + int len; + int ret; + + dev = vlan->dev; + if (unlikely(!(dev->flags & IFF_UP))) + return; + + nskb = skb_clone(skb, GFP_ATOMIC); + if (!nskb) + return; + + len = nskb->len + ETH_HLEN; + nskb->dev = dev; + nskb->pkt_type = PACKET_HOST; + ret = vlan->receive(nskb); + macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); +} + +static void macvlan_forward_sources(struct sk_buff *skb, + const struct macvlan_port *port, + const unsigned char *addr) +{ + struct macvlan_source_list *list; + struct hlist_node *n; + + hlist_for_each_entry_rcu(list, n, &port->vlan_source_hash[addr[5]], + hlist) { + if (!compare_ether_addr_64bits(list->addr, addr)) + if (list->vlan->dev->flags & IFF_UP) + macvlan_forward_sources_one(skb, list->vlan); + } + return; +} + + + /* called under rcu_read_lock() from netif_receive_skb */ static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) { @@ -172,6 +279,8 @@ static rx_handler_result_t macvlan_handl skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); if (!skb) return RX_HANDLER_CONSUMED; + + macvlan_forward_sources(skb, port, eth->h_source); src = macvlan_hash_lookup(port, eth->h_source); if (!src) /* frame comes from an external address */ @@ -202,6 +311,7 @@ static rx_handler_result_t macvlan_handl return RX_HANDLER_PASS; } + macvlan_forward_sources(skb, port, eth->h_source); if (port->passthru) vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); else @@ -474,6 +584,7 @@ static void macvlan_uninit(struct net_de free_percpu(vlan->pcpu_stats); + macvlan_flush_sources(port, vlan); port->count -= 1; if (!port->count) macvlan_port_destroy(port->dev); @@ -615,7 +726,8 @@ static int macvlan_port_create(struct ne INIT_LIST_HEAD(&port->vlans); for (i = 0; i < MACVLAN_HASH_SIZE; i++) INIT_HLIST_HEAD(&port->vlan_hash[i]); - + for (i = 0; i < MACVLAN_HASH_SIZE; i++) + INIT_HLIST_HEAD(&port->vlan_source_hash[i]); err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); if (err) kfree(port); @@ -648,11 +760,31 @@ static int macvlan_validate(struct nlatt case MACVLAN_MODE_VEPA: case MACVLAN_MODE_BRIDGE: case MACVLAN_MODE_PASSTHRU: + case MACVLAN_MODE_SOURCE: break; default: return -EINVAL; } } + + if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { + switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { + case MACVLAN_MACADDR_ADD: + case MACVLAN_MACADDR_DEL: + break; + default: + return -EINVAL; + } + } + + if (data && data[IFLA_MACVLAN_MACADDR]) { + if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) + return -EINVAL; + + if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) + return -EADDRNOTAVAIL; + } + return 0; } @@ -749,6 +881,8 @@ void macvlan_dellink(struct net_device * { struct macvlan_dev *vlan = netdev_priv(dev); + if (vlan->mode == MACVLAN_MODE_SOURCE) + macvlan_flush_sources(vlan->port, vlan); list_del(&vlan->list); unregister_netdevice_queue(dev, head); } @@ -758,8 +892,33 @@ static int macvlan_changelink(struct net struct nlattr *tb[], struct nlattr *data[]) { struct macvlan_dev *vlan = netdev_priv(dev); - if (data && data[IFLA_MACVLAN_MODE]) + + if (data && data[IFLA_MACVLAN_MODE]) { + if (vlan->mode == MACVLAN_MODE_SOURCE && + vlan->mode != nla_get_u32(data[IFLA_MACVLAN_MODE])) + macvlan_flush_sources(vlan->port, vlan); vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); + } + + if (data && data[IFLA_MACVLAN_MACADDR_MODE] && + data[IFLA_MACVLAN_MACADDR]) { + if (vlan->mode == MACVLAN_MODE_SOURCE) { + if ((nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]) == + MACVLAN_MACADDR_ADD)) + macvlan_hash_add_sources(vlan, + nla_data(data[IFLA_MACVLAN_MACADDR])); + else if (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]) == + MACVLAN_MACADDR_DEL) { + struct macvlan_source_list *list; + + list = macvlan_hash_lookup_sources_list(vlan, + nla_data(data[IFLA_MACVLAN_MACADDR])); + if (list) + macvlan_hash_del_sources(list); + } + } + } + return 0; } @@ -768,20 +927,71 @@ static size_t macvlan_get_size(const str return nla_total_size(4); } + +static int macvlan_fill_nested(struct sk_buff *skb, const char *addr) +{ + struct nlattr *nested; + + nested = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); + if (!nested) + return -EMSGSIZE; + NLA_PUT(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, addr); + nla_nest_end(skb, nested); + + return 0; + +nla_put_failure: + nla_nest_cancel(skb, nested); + + return 0; +} + static int macvlan_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct macvlan_dev *vlan = netdev_priv(dev); + struct nlattr *adt; NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode); + + if (vlan->mode == MACVLAN_MODE_SOURCE) { + int i; + + adt = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_ADT); + if (!adt) + goto nla_put_failure; + + for (i = 0; i < MACVLAN_HASH_SIZE; i++) { + struct hlist_node *n; + struct macvlan_source_list *list; + + hlist_for_each_entry_rcu(list, n, + &vlan->port->vlan_source_hash[i], hlist) { + if (list->vlan == vlan) + if (macvlan_fill_nested(skb, + list->addr)) + goto nla_nested_failure; + } + } + nla_nest_end(skb, adt); + } + return 0; +nla_nested_failure: + nla_nest_end(skb, adt); + return -EMSGSIZE; + nla_put_failure: return -EMSGSIZE; } static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, + [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, + [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, + [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, + [IFLA_MACVLAN_MACADDR_ADT] = { .type = NLA_NESTED }, }; int macvlan_link_register(struct rtnl_link_ops *ops) diff -uprN -X linux/Documentation/dontdiff linux-3.2.1-orig/include/linux/if_link.h linux/include/linux/if_link.h --- linux-3.2.1-orig/include/linux/if_link.h 2012-01-12 20:42:45.000000000 +0100 +++ linux/include/linux/if_link.h 2012-01-22 22:07:58.501011424 +0100 @@ -252,6 +252,10 @@ struct ifla_vlan_qos_mapping { enum { IFLA_MACVLAN_UNSPEC, IFLA_MACVLAN_MODE, + IFLA_MACVLAN_MACADDR_MODE, + IFLA_MACVLAN_MACADDR, + IFLA_MACVLAN_MACADDR_DATA, + IFLA_MACVLAN_MACADDR_ADT, __IFLA_MACVLAN_MAX, }; @@ -262,6 +266,12 @@ enum macvlan_mode { MACVLAN_MODE_VEPA = 2, /* talk to other ports through ext bridge */ MACVLAN_MODE_BRIDGE = 4, /* talk to bridge ports directly */ MACVLAN_MODE_PASSTHRU = 8,/* take over the underlying device */ + MACVLAN_MODE_SOURCE = 16,/* use source MAC address list to assign */ +}; + +enum macvlan_macaddr_mode { + MACVLAN_MACADDR_ADD, + MACVLAN_MACADDR_DEL, }; /* SR-IOV virtual function management section */ diff -uprN -X linux/Documentation/dontdiff linux-3.2.1-orig/include/linux/if_macvlan.h linux/include/linux/if_macvlan.h --- linux-3.2.1-orig/include/linux/if_macvlan.h 2012-01-12 20:42:45.000000000 +0100 +++ linux/include/linux/if_macvlan.h 2012-01-20 16:09:04.899241461 +0100 @@ -104,5 +104,11 @@ extern int macvlan_link_register(struct extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, struct net_device *dev); - +/* +static struct macvlan_dev *macvlan_hash_lookup_sources( + const struct macvlan_port *port, + const unsigned char *addr); +static int macvlan_add_sources(struct macvlan_port *port, + struct macvlan_dev *vlan); +*/ #endif /* _LINUX_IF_MACVLAN_H */