1 files changed, 19 insertions, 307 deletions

diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index f80d59f5a161..67cf3f935dba 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -1,7 +1,7 @@
 /*
  * net/tipc/eth_media.c: Ethernet bearer support for TIPC
  *
- * Copyright (c) 2001-2007, Ericsson AB
+ * Copyright (c) 2001-2007, 2013, Ericsson AB
  * Copyright (c) 2005-2008, 2011-2013, Wind River Systems
  * All rights reserved.
  *
@@ -37,259 +37,11 @@
 #include "core.h"
 #include "bearer.h"
 
-#define MAX_ETH_MEDIA           MAX_BEARERS
-
 #define ETH_ADDR_OFFSET 4       /* message header offset of MAC address */
 
-/**
- * struct eth_media - Ethernet bearer data structure
- * @bearer: ptr to associated "generic" bearer structure
- * @dev: ptr to associated Ethernet network device
- * @tipc_packet_type: used in binding TIPC to Ethernet driver
- * @setup: work item used when enabling bearer
- * @cleanup: work item used when disabling bearer
- */
-struct eth_media {
-        struct tipc_bearer *bearer;
-        struct net_device *dev;
-        struct packet_type tipc_packet_type;
-        struct work_struct setup;
-        struct work_struct cleanup;
-};
-
-static struct tipc_media eth_media_info;
-static struct eth_media eth_media_array[MAX_ETH_MEDIA];
-static int eth_started;
-
-static int recv_notification(struct notifier_block *nb, unsigned long evt,
-                             void *dv);
-/*
- * Network device notifier info
- */
-static struct notifier_block notifier = {
-        .notifier_call  = recv_notification,
-        .priority       = 0
-};
-
-/**
- * eth_media_addr_set - initialize Ethernet media address structure
- *
- * Media-dependent "value" field stores MAC address in first 6 bytes
- * and zeroes out the remaining bytes.
- */
-static void eth_media_addr_set(const struct tipc_bearer *tb_ptr,
-                               struct tipc_media_addr *a, char *mac)
-{
-        memcpy(a->value, mac, ETH_ALEN);
-        memset(a->value + ETH_ALEN, 0, sizeof(a->value) - ETH_ALEN);
-        a->media_id = TIPC_MEDIA_TYPE_ETH;
-        a->broadcast = !memcmp(mac, tb_ptr->bcast_addr.value, ETH_ALEN);
-}
-
-/**
- * send_msg - send a TIPC message out over an Ethernet interface
- */
-static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
-                    struct tipc_media_addr *dest)
-{
-        struct sk_buff *clone;
-        struct net_device *dev;
-        int delta;
-
-        clone = skb_clone(buf, GFP_ATOMIC);
-        if (!clone)
-                return 0;
-
-        dev = ((struct eth_media *)(tb_ptr->usr_handle))->dev;
-        delta = dev->hard_header_len - skb_headroom(buf);
-
-        if ((delta > 0) &&
-            pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
-                kfree_skb(clone);
-                return 0;
-        }
-
-        skb_reset_network_header(clone);
-        clone->dev = dev;
-        clone->protocol = htons(ETH_P_TIPC);
-        dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
-                        dev->dev_addr, clone->len);
-        dev_queue_xmit(clone);
-        return 0;
-}
-
-/**
- * recv_msg - handle incoming TIPC message from an Ethernet interface
- *
- * Accept only packets explicitly sent to this node, or broadcast packets;
- * ignores packets sent using Ethernet multicast, and traffic sent to other
- * nodes (which can happen if interface is running in promiscuous mode).
- */
-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;
-
-        if (!net_eq(dev_net(dev), &init_net)) {
-                kfree_skb(buf);
-                return NET_RX_DROP;
-        }
-
-        if (likely(eb_ptr->bearer)) {
-                if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
-                        buf->next = NULL;
-                        tipc_recv_msg(buf, eb_ptr->bearer);
-                        return NET_RX_SUCCESS;
-                }
-        }
-        kfree_skb(buf);
-        return NET_RX_DROP;
-}
-
-/**
- * setup_media - setup association between Ethernet bearer and interface
- */
-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);
-}
-
-/**
- * enable_media - attach TIPC bearer to an Ethernet interface
- */
-static int enable_media(struct tipc_bearer *tb_ptr)
-{
-        struct net_device *dev;
-        struct eth_media *eb_ptr = &eth_media_array[0];
-        struct eth_media *stop = &eth_media_array[MAX_ETH_MEDIA];
-        char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
-        int pending_dev = 0;
-
-        /* Find unused Ethernet bearer structure */
-        while (eb_ptr->dev) {
-                if (!eb_ptr->bearer)
-                        pending_dev++;
-                if (++eb_ptr == stop)
-                        return pending_dev ? -EAGAIN : -EDQUOT;
-        }
-
-        /* Find device with specified name */
-        dev = dev_get_by_name(&init_net, driver_name);
-        if (!dev)
-                return -ENODEV;
-
-        /* 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 */
-        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));
-        memcpy(tb_ptr->bcast_addr.value, dev->broadcast, ETH_ALEN);
-        tb_ptr->bcast_addr.media_id = TIPC_MEDIA_TYPE_ETH;
-        tb_ptr->bcast_addr.broadcast = 1;
-        tb_ptr->mtu = dev->mtu;
-        tb_ptr->blocked = 0;
-        eth_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr);
-        return 0;
-}
-
-/**
- * cleanup_media - break association between Ethernet bearer and interface
- *
- * This routine must be invoked from a work queue because it can sleep.
- */
-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_put(eb_ptr->dev);
-        eb_ptr->dev = NULL;
-}
-
-/**
- * disable_media - detach TIPC bearer from an Ethernet interface
- *
- * Mark Ethernet bearer as inactive so that incoming buffers are thrown away,
- * then get worker thread to complete bearer cleanup.  (Can't do cleanup
- * here because cleanup code needs to sleep and caller holds spinlocks.)
- */
-static void disable_media(struct tipc_bearer *tb_ptr)
-{
-        struct eth_media *eb_ptr = (struct eth_media *)tb_ptr->usr_handle;
-
-        eb_ptr->bearer = NULL;
-        INIT_WORK(&eb_ptr->cleanup, cleanup_media);
-        schedule_work(&eb_ptr->cleanup);
-}
-
-/**
- * recv_notification - handle device updates from OS
- *
- * Change the state of the Ethernet bearer (if any) associated with the
- * specified device.
- */
-static int recv_notification(struct notifier_block *nb, unsigned long evt,
-                             void *ptr)
-{
-        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-        struct eth_media *eb_ptr = &eth_media_array[0];
-        struct eth_media *stop = &eth_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)
-                return NOTIFY_DONE;             /* bearer had been disabled */
-
-        eb_ptr->bearer->mtu = dev->mtu;
-
-        switch (evt) {
-        case NETDEV_CHANGE:
-                if (netif_carrier_ok(dev))
-                        tipc_continue(eb_ptr->bearer);
-                else
-                        tipc_block_bearer(eb_ptr->bearer);
-                break;
-        case NETDEV_UP:
-                tipc_continue(eb_ptr->bearer);
-                break;
-        case NETDEV_DOWN:
-                tipc_block_bearer(eb_ptr->bearer);
-                break;
-        case NETDEV_CHANGEMTU:
-        case NETDEV_CHANGEADDR:
-                tipc_block_bearer(eb_ptr->bearer);
-                tipc_continue(eb_ptr->bearer);
-                break;
-        case NETDEV_UNREGISTER:
-        case NETDEV_CHANGENAME:
-                tipc_disable_bearer(eb_ptr->bearer->name);
-                break;
-        }
-        return NOTIFY_OK;
-}
-
-/**
- * eth_addr2str - convert Ethernet address to string
- */
-static int eth_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
+/* convert Ethernet address to string */
+static int tipc_eth_addr2str(struct tipc_media_addr *a, char *str_buf,
+                             int str_size)
 {
         if (str_size < 18)      /* 18 = strlen("aa:bb:cc:dd:ee:ff\0") */
                 return 1;
@@ -298,10 +50,8 @@ static int eth_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
         return 0;
 }
 
-/**
- * eth_str2addr - convert Ethernet address format to message header format
- */
-static int eth_addr2msg(struct tipc_media_addr *a, char *msg_area)
+/* convert Ethernet address format to message header format */
+static int tipc_eth_addr2msg(struct tipc_media_addr *a, char *msg_area)
 {
         memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE);
         msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_ETH;
@@ -309,68 +59,30 @@ static int eth_addr2msg(struct tipc_media_addr *a, char *msg_area)
         return 0;
 }
 
-/**
- * eth_str2addr - convert message header address format to Ethernet format
- */
-static int eth_msg2addr(const struct tipc_bearer *tb_ptr,
-                        struct tipc_media_addr *a, char *msg_area)
+/* convert message header address format to Ethernet format */
+static int tipc_eth_msg2addr(const struct tipc_bearer *tb_ptr,
+                             struct tipc_media_addr *a, char *msg_area)
 {
         if (msg_area[TIPC_MEDIA_TYPE_OFFSET] != TIPC_MEDIA_TYPE_ETH)
                 return 1;
 
-        eth_media_addr_set(tb_ptr, a, msg_area + ETH_ADDR_OFFSET);
+        tipc_l2_media_addr_set(tb_ptr, a, msg_area + ETH_ADDR_OFFSET);
         return 0;
 }
 
-/*
- * Ethernet media registration info
- */
-static struct tipc_media eth_media_info = {
-        .send_msg       = send_msg,
-        .enable_media   = enable_media,
-        .disable_media  = disable_media,
-        .addr2str       = eth_addr2str,
-        .addr2msg       = eth_addr2msg,
-        .msg2addr       = eth_msg2addr,
+/* Ethernet media registration info */
+struct tipc_media eth_media_info = {
+        .send_msg       = tipc_l2_send_msg,
+        .enable_media   = tipc_enable_l2_media,
+        .disable_media  = tipc_disable_l2_media,
+        .addr2str       = tipc_eth_addr2str,
+        .addr2msg       = tipc_eth_addr2msg,
+        .msg2addr       = tipc_eth_msg2addr,
         .priority       = TIPC_DEF_LINK_PRI,
         .tolerance      = TIPC_DEF_LINK_TOL,
         .window         = TIPC_DEF_LINK_WIN,
         .type_id        = TIPC_MEDIA_TYPE_ETH,
+        .hwaddr_len     = ETH_ALEN,
         .name           = "eth"
 };
 
-/**
- * tipc_eth_media_start - activate Ethernet bearer support
- *
- * Register Ethernet media type with TIPC bearer code.  Also register
- * with OS for notifications about device state changes.
- */
-int tipc_eth_media_start(void)
-{
-        int res;
-
-        if (eth_started)
-                return -EINVAL;
-
-        res = tipc_register_media(&eth_media_info);
-        if (res)
-                return res;
-
-        res = register_netdevice_notifier(&notifier);
-        if (!res)
-                eth_started = 1;
-        return res;
-}
-
-/**
- * tipc_eth_media_stop - deactivate Ethernet bearer support
- */
-void tipc_eth_media_stop(void)
-{
-        if (!eth_started)
-                return;
-
-        flush_scheduled_work();
-        unregister_netdevice_notifier(&notifier);
-        eth_started = 0;
-}