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![Joe Perches](/assets/img/avatar_default.png)
Use the built-in function instead of memset. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2285 lines
60 KiB
C
2285 lines
60 KiB
C
/*
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* lec.c: Lan Emulation driver
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*
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* Marko Kiiskila <mkiiskila@yahoo.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <linux/capability.h>
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/* We are ethernet device */
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <net/sock.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <asm/byteorder.h>
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#include <linux/uaccess.h>
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#include <net/arp.h>
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#include <net/dst.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/seq_file.h>
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/* And atm device */
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#include <linux/atmdev.h>
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#include <linux/atmlec.h>
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/* Proxy LEC knows about bridging */
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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#include "../bridge/br_private.h"
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static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
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#endif
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/* Modular too */
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#include <linux/module.h>
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#include <linux/init.h>
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#include "lec.h"
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#include "lec_arpc.h"
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#include "resources.h"
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#define DUMP_PACKETS 0 /*
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* 0 = None,
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* 1 = 30 first bytes
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* 2 = Whole packet
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*/
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#define LEC_UNRES_QUE_LEN 8 /*
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* number of tx packets to queue for a
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* single destination while waiting for SVC
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*/
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static int lec_open(struct net_device *dev);
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static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
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struct net_device *dev);
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static int lec_close(struct net_device *dev);
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static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
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const unsigned char *mac_addr);
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static int lec_arp_remove(struct lec_priv *priv,
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struct lec_arp_table *to_remove);
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/* LANE2 functions */
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static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
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const u8 *tlvs, u32 sizeoftlvs);
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static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
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u8 **tlvs, u32 *sizeoftlvs);
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static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
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const u8 *tlvs, u32 sizeoftlvs);
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static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
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unsigned long permanent);
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static void lec_arp_check_empties(struct lec_priv *priv,
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struct atm_vcc *vcc, struct sk_buff *skb);
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static void lec_arp_destroy(struct lec_priv *priv);
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static void lec_arp_init(struct lec_priv *priv);
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static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
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const unsigned char *mac_to_find,
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int is_rdesc,
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struct lec_arp_table **ret_entry);
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static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
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const unsigned char *atm_addr,
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unsigned long remoteflag,
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unsigned int targetless_le_arp);
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static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
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static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
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static void lec_set_flush_tran_id(struct lec_priv *priv,
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const unsigned char *atm_addr,
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unsigned long tran_id);
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static void lec_vcc_added(struct lec_priv *priv,
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const struct atmlec_ioc *ioc_data,
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struct atm_vcc *vcc,
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void (*old_push)(struct atm_vcc *vcc,
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struct sk_buff *skb));
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static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
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/* must be done under lec_arp_lock */
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static inline void lec_arp_hold(struct lec_arp_table *entry)
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{
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atomic_inc(&entry->usage);
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}
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static inline void lec_arp_put(struct lec_arp_table *entry)
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{
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if (atomic_dec_and_test(&entry->usage))
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kfree(entry);
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}
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static struct lane2_ops lane2_ops = {
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lane2_resolve, /* resolve, spec 3.1.3 */
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lane2_associate_req, /* associate_req, spec 3.1.4 */
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NULL /* associate indicator, spec 3.1.5 */
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};
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static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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/* Device structures */
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static struct net_device *dev_lec[MAX_LEC_ITF];
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
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{
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char *buff;
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struct lec_priv *priv;
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/*
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* Check if this is a BPDU. If so, ask zeppelin to send
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* LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
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* as the Config BPDU has
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*/
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buff = skb->data + skb->dev->hard_header_len;
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if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
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struct sock *sk;
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struct sk_buff *skb2;
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struct atmlec_msg *mesg;
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skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
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if (skb2 == NULL)
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return;
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skb2->len = sizeof(struct atmlec_msg);
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mesg = (struct atmlec_msg *)skb2->data;
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mesg->type = l_topology_change;
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buff += 4;
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mesg->content.normal.flag = *buff & 0x01;
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/* 0x01 is topology change */
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priv = netdev_priv(dev);
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atm_force_charge(priv->lecd, skb2->truesize);
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sk = sk_atm(priv->lecd);
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skb_queue_tail(&sk->sk_receive_queue, skb2);
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sk->sk_data_ready(sk);
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}
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}
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#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
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/*
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* Open/initialize the netdevice. This is called (in the current kernel)
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* sometime after booting when the 'ifconfig' program is run.
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*
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* This routine should set everything up anew at each open, even
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* registers that "should" only need to be set once at boot, so that
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* there is non-reboot way to recover if something goes wrong.
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*/
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static int lec_open(struct net_device *dev)
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{
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netif_start_queue(dev);
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return 0;
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}
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static void
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lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
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{
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struct net_device *dev = skb->dev;
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ATM_SKB(skb)->vcc = vcc;
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ATM_SKB(skb)->atm_options = vcc->atm_options;
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atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
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if (vcc->send(vcc, skb) < 0) {
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dev->stats.tx_dropped++;
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return;
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}
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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}
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static void lec_tx_timeout(struct net_device *dev)
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{
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pr_info("%s\n", dev->name);
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dev->trans_start = jiffies;
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netif_wake_queue(dev);
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}
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static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct sk_buff *skb2;
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struct lec_priv *priv = netdev_priv(dev);
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struct lecdatahdr_8023 *lec_h;
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struct atm_vcc *vcc;
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struct lec_arp_table *entry;
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unsigned char *dst;
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int min_frame_size;
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int is_rdesc;
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pr_debug("called\n");
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if (!priv->lecd) {
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pr_info("%s:No lecd attached\n", dev->name);
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dev->stats.tx_errors++;
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netif_stop_queue(dev);
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
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(long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
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(long)skb_end_pointer(skb));
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
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lec_handle_bridge(skb, dev);
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#endif
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/* Make sure we have room for lec_id */
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if (skb_headroom(skb) < 2) {
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pr_debug("reallocating skb\n");
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skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
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if (unlikely(!skb2)) {
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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consume_skb(skb);
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skb = skb2;
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}
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skb_push(skb, 2);
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/* Put le header to place */
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lec_h = (struct lecdatahdr_8023 *)skb->data;
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lec_h->le_header = htons(priv->lecid);
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#if DUMP_PACKETS >= 2
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#define MAX_DUMP_SKB 99
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#elif DUMP_PACKETS >= 1
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#define MAX_DUMP_SKB 30
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#endif
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#if DUMP_PACKETS >= 1
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printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
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dev->name, skb->len, priv->lecid);
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print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
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skb->data, min(skb->len, MAX_DUMP_SKB), true);
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#endif /* DUMP_PACKETS >= 1 */
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/* Minimum ethernet-frame size */
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min_frame_size = LEC_MINIMUM_8023_SIZE;
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if (skb->len < min_frame_size) {
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if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
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skb2 = skb_copy_expand(skb, 0,
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min_frame_size - skb->truesize,
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GFP_ATOMIC);
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dev_kfree_skb(skb);
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if (skb2 == NULL) {
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dev->stats.tx_dropped++;
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return NETDEV_TX_OK;
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}
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skb = skb2;
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}
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skb_put(skb, min_frame_size - skb->len);
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}
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/* Send to right vcc */
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is_rdesc = 0;
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dst = lec_h->h_dest;
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entry = NULL;
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vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
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pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
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dev->name, vcc, vcc ? vcc->flags : 0, entry);
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if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
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if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
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pr_debug("%s:queuing packet, MAC address %pM\n",
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dev->name, lec_h->h_dest);
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skb_queue_tail(&entry->tx_wait, skb);
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} else {
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pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
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dev->name, lec_h->h_dest);
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dev->stats.tx_dropped++;
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dev_kfree_skb(skb);
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}
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goto out;
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}
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#if DUMP_PACKETS > 0
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printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
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dev->name, vcc->vpi, vcc->vci);
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#endif /* DUMP_PACKETS > 0 */
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while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
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pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
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lec_send(vcc, skb2);
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}
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lec_send(vcc, skb);
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if (!atm_may_send(vcc, 0)) {
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struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
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vpriv->xoff = 1;
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netif_stop_queue(dev);
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/*
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* vcc->pop() might have occurred in between, making
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* the vcc usuable again. Since xmit is serialized,
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* this is the only situation we have to re-test.
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*/
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if (atm_may_send(vcc, 0))
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netif_wake_queue(dev);
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}
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out:
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if (entry)
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lec_arp_put(entry);
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dev->trans_start = jiffies;
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return NETDEV_TX_OK;
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}
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/* The inverse routine to net_open(). */
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static int lec_close(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return 0;
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}
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static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
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{
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unsigned long flags;
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struct net_device *dev = (struct net_device *)vcc->proto_data;
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struct lec_priv *priv = netdev_priv(dev);
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struct atmlec_msg *mesg;
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struct lec_arp_table *entry;
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int i;
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char *tmp; /* FIXME */
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atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
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mesg = (struct atmlec_msg *)skb->data;
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tmp = skb->data;
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tmp += sizeof(struct atmlec_msg);
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pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
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switch (mesg->type) {
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case l_set_mac_addr:
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for (i = 0; i < 6; i++)
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dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
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break;
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case l_del_mac_addr:
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for (i = 0; i < 6; i++)
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dev->dev_addr[i] = 0;
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break;
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case l_addr_delete:
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lec_addr_delete(priv, mesg->content.normal.atm_addr,
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mesg->content.normal.flag);
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break;
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case l_topology_change:
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priv->topology_change = mesg->content.normal.flag;
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break;
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case l_flush_complete:
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lec_flush_complete(priv, mesg->content.normal.flag);
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break;
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case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
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spin_lock_irqsave(&priv->lec_arp_lock, flags);
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entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
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lec_arp_remove(priv, entry);
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spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
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if (mesg->content.normal.no_source_le_narp)
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break;
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/* FALL THROUGH */
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case l_arp_update:
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lec_arp_update(priv, mesg->content.normal.mac_addr,
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mesg->content.normal.atm_addr,
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mesg->content.normal.flag,
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mesg->content.normal.targetless_le_arp);
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pr_debug("in l_arp_update\n");
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if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
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pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
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mesg->sizeoftlvs);
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lane2_associate_ind(dev, mesg->content.normal.mac_addr,
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tmp, mesg->sizeoftlvs);
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}
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break;
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case l_config:
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priv->maximum_unknown_frame_count =
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mesg->content.config.maximum_unknown_frame_count;
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priv->max_unknown_frame_time =
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(mesg->content.config.max_unknown_frame_time * HZ);
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priv->max_retry_count = mesg->content.config.max_retry_count;
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priv->aging_time = (mesg->content.config.aging_time * HZ);
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priv->forward_delay_time =
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(mesg->content.config.forward_delay_time * HZ);
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priv->arp_response_time =
|
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(mesg->content.config.arp_response_time * HZ);
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priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
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priv->path_switching_delay =
|
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(mesg->content.config.path_switching_delay * HZ);
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priv->lane_version = mesg->content.config.lane_version;
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/* LANE2 */
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priv->lane2_ops = NULL;
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if (priv->lane_version > 1)
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priv->lane2_ops = &lane2_ops;
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rtnl_lock();
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if (dev_set_mtu(dev, mesg->content.config.mtu))
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pr_info("%s: change_mtu to %d failed\n",
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dev->name, mesg->content.config.mtu);
|
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rtnl_unlock();
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priv->is_proxy = mesg->content.config.is_proxy;
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break;
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case l_flush_tran_id:
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lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
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mesg->content.normal.flag);
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break;
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case l_set_lecid:
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priv->lecid =
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(unsigned short)(0xffff & mesg->content.normal.flag);
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break;
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case l_should_bridge:
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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{
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pr_debug("%s: bridge zeppelin asks about %pM\n",
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dev->name, mesg->content.proxy.mac_addr);
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if (br_fdb_test_addr_hook == NULL)
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break;
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if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
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/* hit from bridge table, send LE_ARP_RESPONSE */
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struct sk_buff *skb2;
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struct sock *sk;
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pr_debug("%s: entry found, responding to zeppelin\n",
|
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dev->name);
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skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
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if (skb2 == NULL)
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break;
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skb2->len = sizeof(struct atmlec_msg);
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skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
|
|
atm_force_charge(priv->lecd, skb2->truesize);
|
|
sk = sk_atm(priv->lecd);
|
|
skb_queue_tail(&sk->sk_receive_queue, skb2);
|
|
sk->sk_data_ready(sk);
|
|
}
|
|
}
|
|
#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
|
|
break;
|
|
default:
|
|
pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
|
|
dev_kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static void lec_atm_close(struct atm_vcc *vcc)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct net_device *dev = (struct net_device *)vcc->proto_data;
|
|
struct lec_priv *priv = netdev_priv(dev);
|
|
|
|
priv->lecd = NULL;
|
|
/* Do something needful? */
|
|
|
|
netif_stop_queue(dev);
|
|
lec_arp_destroy(priv);
|
|
|
|
if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
|
|
pr_info("%s closing with messages pending\n", dev->name);
|
|
while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
|
|
atm_return(vcc, skb->truesize);
|
|
dev_kfree_skb(skb);
|
|
}
|
|
|
|
pr_info("%s: Shut down!\n", dev->name);
|
|
module_put(THIS_MODULE);
|
|
}
|
|
|
|
static struct atmdev_ops lecdev_ops = {
|
|
.close = lec_atm_close,
|
|
.send = lec_atm_send
|
|
};
|
|
|
|
static struct atm_dev lecatm_dev = {
|
|
.ops = &lecdev_ops,
|
|
.type = "lec",
|
|
.number = 999, /* dummy device number */
|
|
.lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
|
|
};
|
|
|
|
/*
|
|
* LANE2: new argument struct sk_buff *data contains
|
|
* the LE_ARP based TLVs introduced in the LANE2 spec
|
|
*/
|
|
static int
|
|
send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
|
|
const unsigned char *mac_addr, const unsigned char *atm_addr,
|
|
struct sk_buff *data)
|
|
{
|
|
struct sock *sk;
|
|
struct sk_buff *skb;
|
|
struct atmlec_msg *mesg;
|
|
|
|
if (!priv || !priv->lecd)
|
|
return -1;
|
|
skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
|
|
if (!skb)
|
|
return -1;
|
|
skb->len = sizeof(struct atmlec_msg);
|
|
mesg = (struct atmlec_msg *)skb->data;
|
|
memset(mesg, 0, sizeof(struct atmlec_msg));
|
|
mesg->type = type;
|
|
if (data != NULL)
|
|
mesg->sizeoftlvs = data->len;
|
|
if (mac_addr)
|
|
ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
|
|
else
|
|
mesg->content.normal.targetless_le_arp = 1;
|
|
if (atm_addr)
|
|
memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
|
|
|
|
atm_force_charge(priv->lecd, skb->truesize);
|
|
sk = sk_atm(priv->lecd);
|
|
skb_queue_tail(&sk->sk_receive_queue, skb);
|
|
sk->sk_data_ready(sk);
|
|
|
|
if (data != NULL) {
|
|
pr_debug("about to send %d bytes of data\n", data->len);
|
|
atm_force_charge(priv->lecd, data->truesize);
|
|
skb_queue_tail(&sk->sk_receive_queue, data);
|
|
sk->sk_data_ready(sk);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* shamelessly stolen from drivers/net/net_init.c */
|
|
static int lec_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
if ((new_mtu < 68) || (new_mtu > 18190))
|
|
return -EINVAL;
|
|
dev->mtu = new_mtu;
|
|
return 0;
|
|
}
|
|
|
|
static void lec_set_multicast_list(struct net_device *dev)
|
|
{
|
|
/*
|
|
* by default, all multicast frames arrive over the bus.
|
|
* eventually support selective multicast service
|
|
*/
|
|
}
|
|
|
|
static const struct net_device_ops lec_netdev_ops = {
|
|
.ndo_open = lec_open,
|
|
.ndo_stop = lec_close,
|
|
.ndo_start_xmit = lec_start_xmit,
|
|
.ndo_change_mtu = lec_change_mtu,
|
|
.ndo_tx_timeout = lec_tx_timeout,
|
|
.ndo_set_rx_mode = lec_set_multicast_list,
|
|
};
|
|
|
|
static const unsigned char lec_ctrl_magic[] = {
|
|
0xff,
|
|
0x00,
|
|
0x01,
|
|
0x01
|
|
};
|
|
|
|
#define LEC_DATA_DIRECT_8023 2
|
|
#define LEC_DATA_DIRECT_8025 3
|
|
|
|
static int lec_is_data_direct(struct atm_vcc *vcc)
|
|
{
|
|
return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
|
|
(vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
|
|
}
|
|
|
|
static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
|
|
{
|
|
unsigned long flags;
|
|
struct net_device *dev = (struct net_device *)vcc->proto_data;
|
|
struct lec_priv *priv = netdev_priv(dev);
|
|
|
|
#if DUMP_PACKETS > 0
|
|
printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
|
|
dev->name, vcc->vpi, vcc->vci);
|
|
#endif
|
|
if (!skb) {
|
|
pr_debug("%s: null skb\n", dev->name);
|
|
lec_vcc_close(priv, vcc);
|
|
return;
|
|
}
|
|
#if DUMP_PACKETS >= 2
|
|
#define MAX_SKB_DUMP 99
|
|
#elif DUMP_PACKETS >= 1
|
|
#define MAX_SKB_DUMP 30
|
|
#endif
|
|
#if DUMP_PACKETS > 0
|
|
printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
|
|
dev->name, skb->len, priv->lecid);
|
|
print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
|
|
skb->data, min(MAX_SKB_DUMP, skb->len), true);
|
|
#endif /* DUMP_PACKETS > 0 */
|
|
if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
|
|
/* Control frame, to daemon */
|
|
struct sock *sk = sk_atm(vcc);
|
|
|
|
pr_debug("%s: To daemon\n", dev->name);
|
|
skb_queue_tail(&sk->sk_receive_queue, skb);
|
|
sk->sk_data_ready(sk);
|
|
} else { /* Data frame, queue to protocol handlers */
|
|
struct lec_arp_table *entry;
|
|
unsigned char *src, *dst;
|
|
|
|
atm_return(vcc, skb->truesize);
|
|
if (*(__be16 *) skb->data == htons(priv->lecid) ||
|
|
!priv->lecd || !(dev->flags & IFF_UP)) {
|
|
/*
|
|
* Probably looping back, or if lecd is missing,
|
|
* lecd has gone down
|
|
*/
|
|
pr_debug("Ignoring frame...\n");
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
|
|
|
|
/*
|
|
* If this is a Data Direct VCC, and the VCC does not match
|
|
* the LE_ARP cache entry, delete the LE_ARP cache entry.
|
|
*/
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
if (lec_is_data_direct(vcc)) {
|
|
src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
|
|
entry = lec_arp_find(priv, src);
|
|
if (entry && entry->vcc != vcc) {
|
|
lec_arp_remove(priv, entry);
|
|
lec_arp_put(entry);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
|
|
if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
|
|
!priv->is_proxy && /* Proxy wants all the packets */
|
|
memcmp(dst, dev->dev_addr, dev->addr_len)) {
|
|
dev_kfree_skb(skb);
|
|
return;
|
|
}
|
|
if (!hlist_empty(&priv->lec_arp_empty_ones))
|
|
lec_arp_check_empties(priv, vcc, skb);
|
|
skb_pull(skb, 2); /* skip lec_id */
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
dev->stats.rx_packets++;
|
|
dev->stats.rx_bytes += skb->len;
|
|
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
|
|
static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
|
|
{
|
|
struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
|
|
struct net_device *dev = skb->dev;
|
|
|
|
if (vpriv == NULL) {
|
|
pr_info("vpriv = NULL!?!?!?\n");
|
|
return;
|
|
}
|
|
|
|
vpriv->old_pop(vcc, skb);
|
|
|
|
if (vpriv->xoff && atm_may_send(vcc, 0)) {
|
|
vpriv->xoff = 0;
|
|
if (netif_running(dev) && netif_queue_stopped(dev))
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
|
|
static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
|
|
{
|
|
struct lec_vcc_priv *vpriv;
|
|
int bytes_left;
|
|
struct atmlec_ioc ioc_data;
|
|
|
|
/* Lecd must be up in this case */
|
|
bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
|
|
if (bytes_left != 0)
|
|
pr_info("copy from user failed for %d bytes\n", bytes_left);
|
|
if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
|
|
!dev_lec[ioc_data.dev_num])
|
|
return -EINVAL;
|
|
vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
|
|
if (!vpriv)
|
|
return -ENOMEM;
|
|
vpriv->xoff = 0;
|
|
vpriv->old_pop = vcc->pop;
|
|
vcc->user_back = vpriv;
|
|
vcc->pop = lec_pop;
|
|
lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
|
|
&ioc_data, vcc, vcc->push);
|
|
vcc->proto_data = dev_lec[ioc_data.dev_num];
|
|
vcc->push = lec_push;
|
|
return 0;
|
|
}
|
|
|
|
static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
|
|
{
|
|
if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
|
|
return -EINVAL;
|
|
vcc->proto_data = dev_lec[arg];
|
|
return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
|
|
}
|
|
|
|
/* Initialize device. */
|
|
static int lecd_attach(struct atm_vcc *vcc, int arg)
|
|
{
|
|
int i;
|
|
struct lec_priv *priv;
|
|
|
|
if (arg < 0)
|
|
i = 0;
|
|
else
|
|
i = arg;
|
|
if (arg >= MAX_LEC_ITF)
|
|
return -EINVAL;
|
|
if (!dev_lec[i]) {
|
|
int size;
|
|
|
|
size = sizeof(struct lec_priv);
|
|
dev_lec[i] = alloc_etherdev(size);
|
|
if (!dev_lec[i])
|
|
return -ENOMEM;
|
|
dev_lec[i]->netdev_ops = &lec_netdev_ops;
|
|
snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
|
|
if (register_netdev(dev_lec[i])) {
|
|
free_netdev(dev_lec[i]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
priv = netdev_priv(dev_lec[i]);
|
|
} else {
|
|
priv = netdev_priv(dev_lec[i]);
|
|
if (priv->lecd)
|
|
return -EADDRINUSE;
|
|
}
|
|
lec_arp_init(priv);
|
|
priv->itfnum = i; /* LANE2 addition */
|
|
priv->lecd = vcc;
|
|
vcc->dev = &lecatm_dev;
|
|
vcc_insert_socket(sk_atm(vcc));
|
|
|
|
vcc->proto_data = dev_lec[i];
|
|
set_bit(ATM_VF_META, &vcc->flags);
|
|
set_bit(ATM_VF_READY, &vcc->flags);
|
|
|
|
/* Set default values to these variables */
|
|
priv->maximum_unknown_frame_count = 1;
|
|
priv->max_unknown_frame_time = (1 * HZ);
|
|
priv->vcc_timeout_period = (1200 * HZ);
|
|
priv->max_retry_count = 1;
|
|
priv->aging_time = (300 * HZ);
|
|
priv->forward_delay_time = (15 * HZ);
|
|
priv->topology_change = 0;
|
|
priv->arp_response_time = (1 * HZ);
|
|
priv->flush_timeout = (4 * HZ);
|
|
priv->path_switching_delay = (6 * HZ);
|
|
|
|
if (dev_lec[i]->flags & IFF_UP)
|
|
netif_start_queue(dev_lec[i]);
|
|
__module_get(THIS_MODULE);
|
|
return i;
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static const char *lec_arp_get_status_string(unsigned char status)
|
|
{
|
|
static const char *const lec_arp_status_string[] = {
|
|
"ESI_UNKNOWN ",
|
|
"ESI_ARP_PENDING ",
|
|
"ESI_VC_PENDING ",
|
|
"<Undefined> ",
|
|
"ESI_FLUSH_PENDING ",
|
|
"ESI_FORWARD_DIRECT"
|
|
};
|
|
|
|
if (status > ESI_FORWARD_DIRECT)
|
|
status = 3; /* ESI_UNDEFINED */
|
|
return lec_arp_status_string[status];
|
|
}
|
|
|
|
static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ETH_ALEN; i++)
|
|
seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
|
|
seq_printf(seq, " ");
|
|
for (i = 0; i < ATM_ESA_LEN; i++)
|
|
seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
|
|
seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
|
|
entry->flags & 0xffff);
|
|
if (entry->vcc)
|
|
seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
|
|
else
|
|
seq_printf(seq, " ");
|
|
if (entry->recv_vcc) {
|
|
seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
|
|
entry->recv_vcc->vci);
|
|
}
|
|
seq_putc(seq, '\n');
|
|
}
|
|
|
|
struct lec_state {
|
|
unsigned long flags;
|
|
struct lec_priv *locked;
|
|
struct hlist_node *node;
|
|
struct net_device *dev;
|
|
int itf;
|
|
int arp_table;
|
|
int misc_table;
|
|
};
|
|
|
|
static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
|
|
loff_t *l)
|
|
{
|
|
struct hlist_node *e = state->node;
|
|
|
|
if (!e)
|
|
e = tbl->first;
|
|
if (e == SEQ_START_TOKEN) {
|
|
e = tbl->first;
|
|
--*l;
|
|
}
|
|
|
|
for (; e; e = e->next) {
|
|
if (--*l < 0)
|
|
break;
|
|
}
|
|
state->node = e;
|
|
|
|
return (*l < 0) ? state : NULL;
|
|
}
|
|
|
|
static void *lec_arp_walk(struct lec_state *state, loff_t *l,
|
|
struct lec_priv *priv)
|
|
{
|
|
void *v = NULL;
|
|
int p;
|
|
|
|
for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
|
|
v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
|
|
if (v)
|
|
break;
|
|
}
|
|
state->arp_table = p;
|
|
return v;
|
|
}
|
|
|
|
static void *lec_misc_walk(struct lec_state *state, loff_t *l,
|
|
struct lec_priv *priv)
|
|
{
|
|
struct hlist_head *lec_misc_tables[] = {
|
|
&priv->lec_arp_empty_ones,
|
|
&priv->lec_no_forward,
|
|
&priv->mcast_fwds
|
|
};
|
|
void *v = NULL;
|
|
int q;
|
|
|
|
for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
|
|
v = lec_tbl_walk(state, lec_misc_tables[q], l);
|
|
if (v)
|
|
break;
|
|
}
|
|
state->misc_table = q;
|
|
return v;
|
|
}
|
|
|
|
static void *lec_priv_walk(struct lec_state *state, loff_t *l,
|
|
struct lec_priv *priv)
|
|
{
|
|
if (!state->locked) {
|
|
state->locked = priv;
|
|
spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
|
|
}
|
|
if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
|
|
state->locked = NULL;
|
|
/* Partial state reset for the next time we get called */
|
|
state->arp_table = state->misc_table = 0;
|
|
}
|
|
return state->locked;
|
|
}
|
|
|
|
static void *lec_itf_walk(struct lec_state *state, loff_t *l)
|
|
{
|
|
struct net_device *dev;
|
|
void *v;
|
|
|
|
dev = state->dev ? state->dev : dev_lec[state->itf];
|
|
v = (dev && netdev_priv(dev)) ?
|
|
lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
|
|
if (!v && dev) {
|
|
dev_put(dev);
|
|
/* Partial state reset for the next time we get called */
|
|
dev = NULL;
|
|
}
|
|
state->dev = dev;
|
|
return v;
|
|
}
|
|
|
|
static void *lec_get_idx(struct lec_state *state, loff_t l)
|
|
{
|
|
void *v = NULL;
|
|
|
|
for (; state->itf < MAX_LEC_ITF; state->itf++) {
|
|
v = lec_itf_walk(state, &l);
|
|
if (v)
|
|
break;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
struct lec_state *state = seq->private;
|
|
|
|
state->itf = 0;
|
|
state->dev = NULL;
|
|
state->locked = NULL;
|
|
state->arp_table = 0;
|
|
state->misc_table = 0;
|
|
state->node = SEQ_START_TOKEN;
|
|
|
|
return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
|
|
}
|
|
|
|
static void lec_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
struct lec_state *state = seq->private;
|
|
|
|
if (state->dev) {
|
|
spin_unlock_irqrestore(&state->locked->lec_arp_lock,
|
|
state->flags);
|
|
dev_put(state->dev);
|
|
}
|
|
}
|
|
|
|
static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct lec_state *state = seq->private;
|
|
|
|
v = lec_get_idx(state, 1);
|
|
*pos += !!PTR_ERR(v);
|
|
return v;
|
|
}
|
|
|
|
static int lec_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
static const char lec_banner[] =
|
|
"Itf MAC ATM destination"
|
|
" Status Flags "
|
|
"VPI/VCI Recv VPI/VCI\n";
|
|
|
|
if (v == SEQ_START_TOKEN)
|
|
seq_puts(seq, lec_banner);
|
|
else {
|
|
struct lec_state *state = seq->private;
|
|
struct net_device *dev = state->dev;
|
|
struct lec_arp_table *entry = hlist_entry(state->node,
|
|
struct lec_arp_table,
|
|
next);
|
|
|
|
seq_printf(seq, "%s ", dev->name);
|
|
lec_info(seq, entry);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations lec_seq_ops = {
|
|
.start = lec_seq_start,
|
|
.next = lec_seq_next,
|
|
.stop = lec_seq_stop,
|
|
.show = lec_seq_show,
|
|
};
|
|
|
|
static int lec_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
|
|
}
|
|
|
|
static const struct file_operations lec_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = lec_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release_private,
|
|
};
|
|
#endif
|
|
|
|
static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct atm_vcc *vcc = ATM_SD(sock);
|
|
int err = 0;
|
|
|
|
switch (cmd) {
|
|
case ATMLEC_CTRL:
|
|
case ATMLEC_MCAST:
|
|
case ATMLEC_DATA:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case ATMLEC_CTRL:
|
|
err = lecd_attach(vcc, (int)arg);
|
|
if (err >= 0)
|
|
sock->state = SS_CONNECTED;
|
|
break;
|
|
case ATMLEC_MCAST:
|
|
err = lec_mcast_attach(vcc, (int)arg);
|
|
break;
|
|
case ATMLEC_DATA:
|
|
err = lec_vcc_attach(vcc, (void __user *)arg);
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct atm_ioctl lane_ioctl_ops = {
|
|
.owner = THIS_MODULE,
|
|
.ioctl = lane_ioctl,
|
|
};
|
|
|
|
static int __init lane_module_init(void)
|
|
{
|
|
#ifdef CONFIG_PROC_FS
|
|
struct proc_dir_entry *p;
|
|
|
|
p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
|
|
if (!p) {
|
|
pr_err("Unable to initialize /proc/net/atm/lec\n");
|
|
return -ENOMEM;
|
|
}
|
|
#endif
|
|
|
|
register_atm_ioctl(&lane_ioctl_ops);
|
|
pr_info("lec.c: initialized\n");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit lane_module_cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
remove_proc_entry("lec", atm_proc_root);
|
|
|
|
deregister_atm_ioctl(&lane_ioctl_ops);
|
|
|
|
for (i = 0; i < MAX_LEC_ITF; i++) {
|
|
if (dev_lec[i] != NULL) {
|
|
unregister_netdev(dev_lec[i]);
|
|
free_netdev(dev_lec[i]);
|
|
dev_lec[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
module_init(lane_module_init);
|
|
module_exit(lane_module_cleanup);
|
|
|
|
/*
|
|
* LANE2: 3.1.3, LE_RESOLVE.request
|
|
* Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
|
|
* If sizeoftlvs == NULL the default TLVs associated with with this
|
|
* lec will be used.
|
|
* If dst_mac == NULL, targetless LE_ARP will be sent
|
|
*/
|
|
static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
|
|
u8 **tlvs, u32 *sizeoftlvs)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_priv *priv = netdev_priv(dev);
|
|
struct lec_arp_table *table;
|
|
struct sk_buff *skb;
|
|
int retval;
|
|
|
|
if (force == 0) {
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
table = lec_arp_find(priv, dst_mac);
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
if (table == NULL)
|
|
return -1;
|
|
|
|
*tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
|
|
if (*tlvs == NULL)
|
|
return -1;
|
|
|
|
*sizeoftlvs = table->sizeoftlvs;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sizeoftlvs == NULL)
|
|
retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
|
|
|
|
else {
|
|
skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return -1;
|
|
skb->len = *sizeoftlvs;
|
|
skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
|
|
retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* LANE2: 3.1.4, LE_ASSOCIATE.request
|
|
* Associate the *tlvs with the *lan_dst address.
|
|
* Will overwrite any previous association
|
|
* Returns 1 for success, 0 for failure (out of memory)
|
|
*
|
|
*/
|
|
static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
|
|
const u8 *tlvs, u32 sizeoftlvs)
|
|
{
|
|
int retval;
|
|
struct sk_buff *skb;
|
|
struct lec_priv *priv = netdev_priv(dev);
|
|
|
|
if (!ether_addr_equal(lan_dst, dev->dev_addr))
|
|
return 0; /* not our mac address */
|
|
|
|
kfree(priv->tlvs); /* NULL if there was no previous association */
|
|
|
|
priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
|
|
if (priv->tlvs == NULL)
|
|
return 0;
|
|
priv->sizeoftlvs = sizeoftlvs;
|
|
|
|
skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return 0;
|
|
skb->len = sizeoftlvs;
|
|
skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
|
|
retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
|
|
if (retval != 0)
|
|
pr_info("lec.c: lane2_associate_req() failed\n");
|
|
/*
|
|
* If the previous association has changed we must
|
|
* somehow notify other LANE entities about the change
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* LANE2: 3.1.5, LE_ASSOCIATE.indication
|
|
*
|
|
*/
|
|
static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
|
|
const u8 *tlvs, u32 sizeoftlvs)
|
|
{
|
|
#if 0
|
|
int i = 0;
|
|
#endif
|
|
struct lec_priv *priv = netdev_priv(dev);
|
|
#if 0 /*
|
|
* Why have the TLVs in LE_ARP entries
|
|
* since we do not use them? When you
|
|
* uncomment this code, make sure the
|
|
* TLVs get freed when entry is killed
|
|
*/
|
|
struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
|
|
|
|
if (entry == NULL)
|
|
return; /* should not happen */
|
|
|
|
kfree(entry->tlvs);
|
|
|
|
entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
|
|
if (entry->tlvs == NULL)
|
|
return;
|
|
entry->sizeoftlvs = sizeoftlvs;
|
|
#endif
|
|
#if 0
|
|
pr_info("\n");
|
|
pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
|
|
while (i < sizeoftlvs)
|
|
pr_cont("%02x ", tlvs[i++]);
|
|
|
|
pr_cont("\n");
|
|
#endif
|
|
|
|
/* tell MPOA about the TLVs we saw */
|
|
if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
|
|
priv->lane2_ops->associate_indicator(dev, mac_addr,
|
|
tlvs, sizeoftlvs);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Here starts what used to lec_arpc.c
|
|
*
|
|
* lec_arpc.c was added here when making
|
|
* lane client modular. October 1997
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/param.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/inetdevice.h>
|
|
#include <net/route.h>
|
|
|
|
#if 0
|
|
#define pr_debug(format, args...)
|
|
/*
|
|
#define pr_debug printk
|
|
*/
|
|
#endif
|
|
#define DEBUG_ARP_TABLE 0
|
|
|
|
#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
|
|
|
|
static void lec_arp_check_expire(struct work_struct *work);
|
|
static void lec_arp_expire_arp(unsigned long data);
|
|
|
|
/*
|
|
* Arp table funcs
|
|
*/
|
|
|
|
#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
|
|
|
|
/*
|
|
* Initialization of arp-cache
|
|
*/
|
|
static void lec_arp_init(struct lec_priv *priv)
|
|
{
|
|
unsigned short i;
|
|
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
|
|
INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
|
|
INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
|
|
INIT_HLIST_HEAD(&priv->lec_no_forward);
|
|
INIT_HLIST_HEAD(&priv->mcast_fwds);
|
|
spin_lock_init(&priv->lec_arp_lock);
|
|
INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
|
|
schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
|
|
}
|
|
|
|
static void lec_arp_clear_vccs(struct lec_arp_table *entry)
|
|
{
|
|
if (entry->vcc) {
|
|
struct atm_vcc *vcc = entry->vcc;
|
|
struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
|
|
struct net_device *dev = (struct net_device *)vcc->proto_data;
|
|
|
|
vcc->pop = vpriv->old_pop;
|
|
if (vpriv->xoff)
|
|
netif_wake_queue(dev);
|
|
kfree(vpriv);
|
|
vcc->user_back = NULL;
|
|
vcc->push = entry->old_push;
|
|
vcc_release_async(vcc, -EPIPE);
|
|
entry->vcc = NULL;
|
|
}
|
|
if (entry->recv_vcc) {
|
|
entry->recv_vcc->push = entry->old_recv_push;
|
|
vcc_release_async(entry->recv_vcc, -EPIPE);
|
|
entry->recv_vcc = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Insert entry to lec_arp_table
|
|
* LANE2: Add to the end of the list to satisfy 8.1.13
|
|
*/
|
|
static inline void
|
|
lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
|
|
{
|
|
struct hlist_head *tmp;
|
|
|
|
tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
|
|
hlist_add_head(&entry->next, tmp);
|
|
|
|
pr_debug("Added entry:%pM\n", entry->mac_addr);
|
|
}
|
|
|
|
/*
|
|
* Remove entry from lec_arp_table
|
|
*/
|
|
static int
|
|
lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
|
|
{
|
|
struct lec_arp_table *entry;
|
|
int i, remove_vcc = 1;
|
|
|
|
if (!to_remove)
|
|
return -1;
|
|
|
|
hlist_del(&to_remove->next);
|
|
del_timer(&to_remove->timer);
|
|
|
|
/*
|
|
* If this is the only MAC connected to this VCC,
|
|
* also tear down the VCC
|
|
*/
|
|
if (to_remove->status >= ESI_FLUSH_PENDING) {
|
|
/*
|
|
* ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
|
|
*/
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry(entry,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (memcmp(to_remove->atm_addr,
|
|
entry->atm_addr, ATM_ESA_LEN) == 0) {
|
|
remove_vcc = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (remove_vcc)
|
|
lec_arp_clear_vccs(to_remove);
|
|
}
|
|
skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
|
|
|
|
pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
|
|
return 0;
|
|
}
|
|
|
|
#if DEBUG_ARP_TABLE
|
|
static const char *get_status_string(unsigned char st)
|
|
{
|
|
switch (st) {
|
|
case ESI_UNKNOWN:
|
|
return "ESI_UNKNOWN";
|
|
case ESI_ARP_PENDING:
|
|
return "ESI_ARP_PENDING";
|
|
case ESI_VC_PENDING:
|
|
return "ESI_VC_PENDING";
|
|
case ESI_FLUSH_PENDING:
|
|
return "ESI_FLUSH_PENDING";
|
|
case ESI_FORWARD_DIRECT:
|
|
return "ESI_FORWARD_DIRECT";
|
|
}
|
|
return "<UNKNOWN>";
|
|
}
|
|
|
|
static void dump_arp_table(struct lec_priv *priv)
|
|
{
|
|
struct lec_arp_table *rulla;
|
|
char buf[256];
|
|
int i, j, offset;
|
|
|
|
pr_info("Dump %p:\n", priv);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry(rulla,
|
|
&priv->lec_arp_tables[i], next) {
|
|
offset = 0;
|
|
offset += sprintf(buf, "%d: %p\n", i, rulla);
|
|
offset += sprintf(buf + offset, "Mac: %pM",
|
|
rulla->mac_addr);
|
|
offset += sprintf(buf + offset, " Atm:");
|
|
for (j = 0; j < ATM_ESA_LEN; j++) {
|
|
offset += sprintf(buf + offset,
|
|
"%2.2x ",
|
|
rulla->atm_addr[j] & 0xff);
|
|
}
|
|
offset += sprintf(buf + offset,
|
|
"Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
|
|
rulla->vcc ? rulla->vcc->vpi : 0,
|
|
rulla->vcc ? rulla->vcc->vci : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->
|
|
vpi : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->
|
|
vci : 0, rulla->last_used,
|
|
rulla->timestamp, rulla->no_tries);
|
|
offset +=
|
|
sprintf(buf + offset,
|
|
"Flags:%x, Packets_flooded:%x, Status: %s ",
|
|
rulla->flags, rulla->packets_flooded,
|
|
get_status_string(rulla->status));
|
|
pr_info("%s\n", buf);
|
|
}
|
|
}
|
|
|
|
if (!hlist_empty(&priv->lec_no_forward))
|
|
pr_info("No forward\n");
|
|
hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
|
|
offset = 0;
|
|
offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
|
|
offset += sprintf(buf + offset, " Atm:");
|
|
for (j = 0; j < ATM_ESA_LEN; j++) {
|
|
offset += sprintf(buf + offset, "%2.2x ",
|
|
rulla->atm_addr[j] & 0xff);
|
|
}
|
|
offset += sprintf(buf + offset,
|
|
"Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
|
|
rulla->vcc ? rulla->vcc->vpi : 0,
|
|
rulla->vcc ? rulla->vcc->vci : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
|
|
rulla->last_used,
|
|
rulla->timestamp, rulla->no_tries);
|
|
offset += sprintf(buf + offset,
|
|
"Flags:%x, Packets_flooded:%x, Status: %s ",
|
|
rulla->flags, rulla->packets_flooded,
|
|
get_status_string(rulla->status));
|
|
pr_info("%s\n", buf);
|
|
}
|
|
|
|
if (!hlist_empty(&priv->lec_arp_empty_ones))
|
|
pr_info("Empty ones\n");
|
|
hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
|
|
offset = 0;
|
|
offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
|
|
offset += sprintf(buf + offset, " Atm:");
|
|
for (j = 0; j < ATM_ESA_LEN; j++) {
|
|
offset += sprintf(buf + offset, "%2.2x ",
|
|
rulla->atm_addr[j] & 0xff);
|
|
}
|
|
offset += sprintf(buf + offset,
|
|
"Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
|
|
rulla->vcc ? rulla->vcc->vpi : 0,
|
|
rulla->vcc ? rulla->vcc->vci : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
|
|
rulla->last_used,
|
|
rulla->timestamp, rulla->no_tries);
|
|
offset += sprintf(buf + offset,
|
|
"Flags:%x, Packets_flooded:%x, Status: %s ",
|
|
rulla->flags, rulla->packets_flooded,
|
|
get_status_string(rulla->status));
|
|
pr_info("%s", buf);
|
|
}
|
|
|
|
if (!hlist_empty(&priv->mcast_fwds))
|
|
pr_info("Multicast Forward VCCs\n");
|
|
hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
|
|
offset = 0;
|
|
offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
|
|
offset += sprintf(buf + offset, " Atm:");
|
|
for (j = 0; j < ATM_ESA_LEN; j++) {
|
|
offset += sprintf(buf + offset, "%2.2x ",
|
|
rulla->atm_addr[j] & 0xff);
|
|
}
|
|
offset += sprintf(buf + offset,
|
|
"Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
|
|
rulla->vcc ? rulla->vcc->vpi : 0,
|
|
rulla->vcc ? rulla->vcc->vci : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
|
|
rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
|
|
rulla->last_used,
|
|
rulla->timestamp, rulla->no_tries);
|
|
offset += sprintf(buf + offset,
|
|
"Flags:%x, Packets_flooded:%x, Status: %s ",
|
|
rulla->flags, rulla->packets_flooded,
|
|
get_status_string(rulla->status));
|
|
pr_info("%s\n", buf);
|
|
}
|
|
|
|
}
|
|
#else
|
|
#define dump_arp_table(priv) do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* Destruction of arp-cache
|
|
*/
|
|
static void lec_arp_destroy(struct lec_priv *priv)
|
|
{
|
|
unsigned long flags;
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry;
|
|
int i;
|
|
|
|
cancel_delayed_work_sync(&priv->lec_arp_work);
|
|
|
|
/*
|
|
* Remove all entries
|
|
*/
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_tables[i], next) {
|
|
lec_arp_remove(priv, entry);
|
|
lec_arp_put(entry);
|
|
}
|
|
INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
|
|
}
|
|
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_empty_ones, next) {
|
|
del_timer_sync(&entry->timer);
|
|
lec_arp_clear_vccs(entry);
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
|
|
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_no_forward, next) {
|
|
del_timer_sync(&entry->timer);
|
|
lec_arp_clear_vccs(entry);
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
INIT_HLIST_HEAD(&priv->lec_no_forward);
|
|
|
|
hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
|
|
/* No timer, LANEv2 7.1.20 and 2.3.5.3 */
|
|
lec_arp_clear_vccs(entry);
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
INIT_HLIST_HEAD(&priv->mcast_fwds);
|
|
priv->mcast_vcc = NULL;
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Find entry by mac_address
|
|
*/
|
|
static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
|
|
const unsigned char *mac_addr)
|
|
{
|
|
struct hlist_head *head;
|
|
struct lec_arp_table *entry;
|
|
|
|
pr_debug("%pM\n", mac_addr);
|
|
|
|
head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
|
|
hlist_for_each_entry(entry, head, next) {
|
|
if (ether_addr_equal(mac_addr, entry->mac_addr))
|
|
return entry;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct lec_arp_table *make_entry(struct lec_priv *priv,
|
|
const unsigned char *mac_addr)
|
|
{
|
|
struct lec_arp_table *to_return;
|
|
|
|
to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
|
|
if (!to_return) {
|
|
pr_info("LEC: Arp entry kmalloc failed\n");
|
|
return NULL;
|
|
}
|
|
ether_addr_copy(to_return->mac_addr, mac_addr);
|
|
INIT_HLIST_NODE(&to_return->next);
|
|
setup_timer(&to_return->timer, lec_arp_expire_arp,
|
|
(unsigned long)to_return);
|
|
to_return->last_used = jiffies;
|
|
to_return->priv = priv;
|
|
skb_queue_head_init(&to_return->tx_wait);
|
|
atomic_set(&to_return->usage, 1);
|
|
return to_return;
|
|
}
|
|
|
|
/* Arp sent timer expired */
|
|
static void lec_arp_expire_arp(unsigned long data)
|
|
{
|
|
struct lec_arp_table *entry;
|
|
|
|
entry = (struct lec_arp_table *)data;
|
|
|
|
pr_debug("\n");
|
|
if (entry->status == ESI_ARP_PENDING) {
|
|
if (entry->no_tries <= entry->priv->max_retry_count) {
|
|
if (entry->is_rdesc)
|
|
send_to_lecd(entry->priv, l_rdesc_arp_xmt,
|
|
entry->mac_addr, NULL, NULL);
|
|
else
|
|
send_to_lecd(entry->priv, l_arp_xmt,
|
|
entry->mac_addr, NULL, NULL);
|
|
entry->no_tries++;
|
|
}
|
|
mod_timer(&entry->timer, jiffies + (1 * HZ));
|
|
}
|
|
}
|
|
|
|
/* Unknown/unused vcc expire, remove associated entry */
|
|
static void lec_arp_expire_vcc(unsigned long data)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
|
|
struct lec_priv *priv = to_remove->priv;
|
|
|
|
del_timer(&to_remove->timer);
|
|
|
|
pr_debug("%p %p: vpi:%d vci:%d\n",
|
|
to_remove, priv,
|
|
to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
|
|
to_remove->vcc ? to_remove->recv_vcc->vci : 0);
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
hlist_del(&to_remove->next);
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
|
|
lec_arp_clear_vccs(to_remove);
|
|
lec_arp_put(to_remove);
|
|
}
|
|
|
|
static bool __lec_arp_check_expire(struct lec_arp_table *entry,
|
|
unsigned long now,
|
|
struct lec_priv *priv)
|
|
{
|
|
unsigned long time_to_check;
|
|
|
|
if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
|
|
time_to_check = priv->forward_delay_time;
|
|
else
|
|
time_to_check = priv->aging_time;
|
|
|
|
pr_debug("About to expire: %lx - %lx > %lx\n",
|
|
now, entry->last_used, time_to_check);
|
|
if (time_after(now, entry->last_used + time_to_check) &&
|
|
!(entry->flags & LEC_PERMANENT_FLAG) &&
|
|
!(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
|
|
/* Remove entry */
|
|
pr_debug("Entry timed out\n");
|
|
lec_arp_remove(priv, entry);
|
|
lec_arp_put(entry);
|
|
} else {
|
|
/* Something else */
|
|
if ((entry->status == ESI_VC_PENDING ||
|
|
entry->status == ESI_ARP_PENDING) &&
|
|
time_after_eq(now, entry->timestamp +
|
|
priv->max_unknown_frame_time)) {
|
|
entry->timestamp = jiffies;
|
|
entry->packets_flooded = 0;
|
|
if (entry->status == ESI_VC_PENDING)
|
|
send_to_lecd(priv, l_svc_setup,
|
|
entry->mac_addr,
|
|
entry->atm_addr,
|
|
NULL);
|
|
}
|
|
if (entry->status == ESI_FLUSH_PENDING &&
|
|
time_after_eq(now, entry->timestamp +
|
|
priv->path_switching_delay)) {
|
|
lec_arp_hold(entry);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
/*
|
|
* Expire entries.
|
|
* 1. Re-set timer
|
|
* 2. For each entry, delete entries that have aged past the age limit.
|
|
* 3. For each entry, depending on the status of the entry, perform
|
|
* the following maintenance.
|
|
* a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
|
|
* tick_count is above the max_unknown_frame_time, clear
|
|
* the tick_count to zero and clear the packets_flooded counter
|
|
* to zero. This supports the packet rate limit per address
|
|
* while flooding unknowns.
|
|
* b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
|
|
* than or equal to the path_switching_delay, change the status
|
|
* to ESI_FORWARD_DIRECT. This causes the flush period to end
|
|
* regardless of the progress of the flush protocol.
|
|
*/
|
|
static void lec_arp_check_expire(struct work_struct *work)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_priv *priv =
|
|
container_of(work, struct lec_priv, lec_arp_work.work);
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry;
|
|
unsigned long now;
|
|
int i;
|
|
|
|
pr_debug("%p\n", priv);
|
|
now = jiffies;
|
|
restart:
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (__lec_arp_check_expire(entry, now, priv)) {
|
|
struct sk_buff *skb;
|
|
struct atm_vcc *vcc = entry->vcc;
|
|
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock,
|
|
flags);
|
|
while ((skb = skb_dequeue(&entry->tx_wait)))
|
|
lec_send(vcc, skb);
|
|
entry->last_used = jiffies;
|
|
entry->status = ESI_FORWARD_DIRECT;
|
|
lec_arp_put(entry);
|
|
|
|
goto restart;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
|
|
schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
|
|
}
|
|
|
|
/*
|
|
* Try to find vcc where mac_address is attached.
|
|
*
|
|
*/
|
|
static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
|
|
const unsigned char *mac_to_find,
|
|
int is_rdesc,
|
|
struct lec_arp_table **ret_entry)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_arp_table *entry;
|
|
struct atm_vcc *found;
|
|
|
|
if (mac_to_find[0] & 0x01) {
|
|
switch (priv->lane_version) {
|
|
case 1:
|
|
return priv->mcast_vcc;
|
|
case 2: /* LANE2 wants arp for multicast addresses */
|
|
if (ether_addr_equal(mac_to_find, bus_mac))
|
|
return priv->mcast_vcc;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
entry = lec_arp_find(priv, mac_to_find);
|
|
|
|
if (entry) {
|
|
if (entry->status == ESI_FORWARD_DIRECT) {
|
|
/* Connection Ok */
|
|
entry->last_used = jiffies;
|
|
lec_arp_hold(entry);
|
|
*ret_entry = entry;
|
|
found = entry->vcc;
|
|
goto out;
|
|
}
|
|
/*
|
|
* If the LE_ARP cache entry is still pending, reset count to 0
|
|
* so another LE_ARP request can be made for this frame.
|
|
*/
|
|
if (entry->status == ESI_ARP_PENDING)
|
|
entry->no_tries = 0;
|
|
/*
|
|
* Data direct VC not yet set up, check to see if the unknown
|
|
* frame count is greater than the limit. If the limit has
|
|
* not been reached, allow the caller to send packet to
|
|
* BUS.
|
|
*/
|
|
if (entry->status != ESI_FLUSH_PENDING &&
|
|
entry->packets_flooded <
|
|
priv->maximum_unknown_frame_count) {
|
|
entry->packets_flooded++;
|
|
pr_debug("Flooding..\n");
|
|
found = priv->mcast_vcc;
|
|
goto out;
|
|
}
|
|
/*
|
|
* We got here because entry->status == ESI_FLUSH_PENDING
|
|
* or BUS flood limit was reached for an entry which is
|
|
* in ESI_ARP_PENDING or ESI_VC_PENDING state.
|
|
*/
|
|
lec_arp_hold(entry);
|
|
*ret_entry = entry;
|
|
pr_debug("entry->status %d entry->vcc %p\n", entry->status,
|
|
entry->vcc);
|
|
found = NULL;
|
|
} else {
|
|
/* No matching entry was found */
|
|
entry = make_entry(priv, mac_to_find);
|
|
pr_debug("Making entry\n");
|
|
if (!entry) {
|
|
found = priv->mcast_vcc;
|
|
goto out;
|
|
}
|
|
lec_arp_add(priv, entry);
|
|
/* We want arp-request(s) to be sent */
|
|
entry->packets_flooded = 1;
|
|
entry->status = ESI_ARP_PENDING;
|
|
entry->no_tries = 1;
|
|
entry->last_used = entry->timestamp = jiffies;
|
|
entry->is_rdesc = is_rdesc;
|
|
if (entry->is_rdesc)
|
|
send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
|
|
NULL);
|
|
else
|
|
send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
|
|
entry->timer.expires = jiffies + (1 * HZ);
|
|
entry->timer.function = lec_arp_expire_arp;
|
|
add_timer(&entry->timer);
|
|
found = priv->mcast_vcc;
|
|
}
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
return found;
|
|
}
|
|
|
|
static int
|
|
lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
|
|
unsigned long permanent)
|
|
{
|
|
unsigned long flags;
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry;
|
|
int i;
|
|
|
|
pr_debug("\n");
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
|
|
(permanent ||
|
|
!(entry->flags & LEC_PERMANENT_FLAG))) {
|
|
lec_arp_remove(priv, entry);
|
|
lec_arp_put(entry);
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
return 0;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Notifies: Response to arp_request (atm_addr != NULL)
|
|
*/
|
|
static void
|
|
lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
|
|
const unsigned char *atm_addr, unsigned long remoteflag,
|
|
unsigned int targetless_le_arp)
|
|
{
|
|
unsigned long flags;
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry, *tmp;
|
|
int i;
|
|
|
|
pr_debug("%smac:%pM\n",
|
|
(targetless_le_arp) ? "targetless " : "", mac_addr);
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
entry = lec_arp_find(priv, mac_addr);
|
|
if (entry == NULL && targetless_le_arp)
|
|
goto out; /*
|
|
* LANE2: ignore targetless LE_ARPs for which
|
|
* we have no entry in the cache. 7.1.30
|
|
*/
|
|
if (!hlist_empty(&priv->lec_arp_empty_ones)) {
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_empty_ones, next) {
|
|
if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
|
|
hlist_del(&entry->next);
|
|
del_timer(&entry->timer);
|
|
tmp = lec_arp_find(priv, mac_addr);
|
|
if (tmp) {
|
|
del_timer(&tmp->timer);
|
|
tmp->status = ESI_FORWARD_DIRECT;
|
|
memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
|
|
tmp->vcc = entry->vcc;
|
|
tmp->old_push = entry->old_push;
|
|
tmp->last_used = jiffies;
|
|
del_timer(&entry->timer);
|
|
lec_arp_put(entry);
|
|
entry = tmp;
|
|
} else {
|
|
entry->status = ESI_FORWARD_DIRECT;
|
|
ether_addr_copy(entry->mac_addr,
|
|
mac_addr);
|
|
entry->last_used = jiffies;
|
|
lec_arp_add(priv, entry);
|
|
}
|
|
if (remoteflag)
|
|
entry->flags |= LEC_REMOTE_FLAG;
|
|
else
|
|
entry->flags &= ~LEC_REMOTE_FLAG;
|
|
pr_debug("After update\n");
|
|
dump_arp_table(priv);
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
entry = lec_arp_find(priv, mac_addr);
|
|
if (!entry) {
|
|
entry = make_entry(priv, mac_addr);
|
|
if (!entry)
|
|
goto out;
|
|
entry->status = ESI_UNKNOWN;
|
|
lec_arp_add(priv, entry);
|
|
/* Temporary, changes before end of function */
|
|
}
|
|
memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
|
|
del_timer(&entry->timer);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry(tmp,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (entry != tmp &&
|
|
!memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
|
|
/* Vcc to this host exists */
|
|
if (tmp->status > ESI_VC_PENDING) {
|
|
/*
|
|
* ESI_FLUSH_PENDING,
|
|
* ESI_FORWARD_DIRECT
|
|
*/
|
|
entry->vcc = tmp->vcc;
|
|
entry->old_push = tmp->old_push;
|
|
}
|
|
entry->status = tmp->status;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (remoteflag)
|
|
entry->flags |= LEC_REMOTE_FLAG;
|
|
else
|
|
entry->flags &= ~LEC_REMOTE_FLAG;
|
|
if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
|
|
entry->status = ESI_VC_PENDING;
|
|
send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
|
|
}
|
|
pr_debug("After update2\n");
|
|
dump_arp_table(priv);
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Notifies: Vcc setup ready
|
|
*/
|
|
static void
|
|
lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
|
|
struct atm_vcc *vcc,
|
|
void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
|
|
{
|
|
unsigned long flags;
|
|
struct lec_arp_table *entry;
|
|
int i, found_entry = 0;
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
/* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
|
|
if (ioc_data->receive == 2) {
|
|
pr_debug("LEC_ARP: Attaching mcast forward\n");
|
|
#if 0
|
|
entry = lec_arp_find(priv, bus_mac);
|
|
if (!entry) {
|
|
pr_info("LEC_ARP: Multicast entry not found!\n");
|
|
goto out;
|
|
}
|
|
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
|
|
entry->recv_vcc = vcc;
|
|
entry->old_recv_push = old_push;
|
|
#endif
|
|
entry = make_entry(priv, bus_mac);
|
|
if (entry == NULL)
|
|
goto out;
|
|
del_timer(&entry->timer);
|
|
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
|
|
entry->recv_vcc = vcc;
|
|
entry->old_recv_push = old_push;
|
|
hlist_add_head(&entry->next, &priv->mcast_fwds);
|
|
goto out;
|
|
} else if (ioc_data->receive == 1) {
|
|
/*
|
|
* Vcc which we don't want to make default vcc,
|
|
* attach it anyway.
|
|
*/
|
|
pr_debug("LEC_ARP:Attaching data direct, not default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
|
|
ioc_data->atm_addr[0], ioc_data->atm_addr[1],
|
|
ioc_data->atm_addr[2], ioc_data->atm_addr[3],
|
|
ioc_data->atm_addr[4], ioc_data->atm_addr[5],
|
|
ioc_data->atm_addr[6], ioc_data->atm_addr[7],
|
|
ioc_data->atm_addr[8], ioc_data->atm_addr[9],
|
|
ioc_data->atm_addr[10], ioc_data->atm_addr[11],
|
|
ioc_data->atm_addr[12], ioc_data->atm_addr[13],
|
|
ioc_data->atm_addr[14], ioc_data->atm_addr[15],
|
|
ioc_data->atm_addr[16], ioc_data->atm_addr[17],
|
|
ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
|
|
entry = make_entry(priv, bus_mac);
|
|
if (entry == NULL)
|
|
goto out;
|
|
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
|
|
eth_zero_addr(entry->mac_addr);
|
|
entry->recv_vcc = vcc;
|
|
entry->old_recv_push = old_push;
|
|
entry->status = ESI_UNKNOWN;
|
|
entry->timer.expires = jiffies + priv->vcc_timeout_period;
|
|
entry->timer.function = lec_arp_expire_vcc;
|
|
hlist_add_head(&entry->next, &priv->lec_no_forward);
|
|
add_timer(&entry->timer);
|
|
dump_arp_table(priv);
|
|
goto out;
|
|
}
|
|
pr_debug("LEC_ARP:Attaching data direct, default: %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
|
|
ioc_data->atm_addr[0], ioc_data->atm_addr[1],
|
|
ioc_data->atm_addr[2], ioc_data->atm_addr[3],
|
|
ioc_data->atm_addr[4], ioc_data->atm_addr[5],
|
|
ioc_data->atm_addr[6], ioc_data->atm_addr[7],
|
|
ioc_data->atm_addr[8], ioc_data->atm_addr[9],
|
|
ioc_data->atm_addr[10], ioc_data->atm_addr[11],
|
|
ioc_data->atm_addr[12], ioc_data->atm_addr[13],
|
|
ioc_data->atm_addr[14], ioc_data->atm_addr[15],
|
|
ioc_data->atm_addr[16], ioc_data->atm_addr[17],
|
|
ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry(entry,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (memcmp
|
|
(ioc_data->atm_addr, entry->atm_addr,
|
|
ATM_ESA_LEN) == 0) {
|
|
pr_debug("LEC_ARP: Attaching data direct\n");
|
|
pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
|
|
entry->vcc ? entry->vcc->vci : 0,
|
|
entry->recv_vcc ? entry->recv_vcc->
|
|
vci : 0);
|
|
found_entry = 1;
|
|
del_timer(&entry->timer);
|
|
entry->vcc = vcc;
|
|
entry->old_push = old_push;
|
|
if (entry->status == ESI_VC_PENDING) {
|
|
if (priv->maximum_unknown_frame_count
|
|
== 0)
|
|
entry->status =
|
|
ESI_FORWARD_DIRECT;
|
|
else {
|
|
entry->timestamp = jiffies;
|
|
entry->status =
|
|
ESI_FLUSH_PENDING;
|
|
#if 0
|
|
send_to_lecd(priv, l_flush_xmt,
|
|
NULL,
|
|
entry->atm_addr,
|
|
NULL);
|
|
#endif
|
|
}
|
|
} else {
|
|
/*
|
|
* They were forming a connection
|
|
* to us, and we to them. Our
|
|
* ATM address is numerically lower
|
|
* than theirs, so we make connection
|
|
* we formed into default VCC (8.1.11).
|
|
* Connection they made gets torn
|
|
* down. This might confuse some
|
|
* clients. Can be changed if
|
|
* someone reports trouble...
|
|
*/
|
|
;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (found_entry) {
|
|
pr_debug("After vcc was added\n");
|
|
dump_arp_table(priv);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Not found, snatch address from first data packet that arrives
|
|
* from this vcc
|
|
*/
|
|
entry = make_entry(priv, bus_mac);
|
|
if (!entry)
|
|
goto out;
|
|
entry->vcc = vcc;
|
|
entry->old_push = old_push;
|
|
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
|
|
eth_zero_addr(entry->mac_addr);
|
|
entry->status = ESI_UNKNOWN;
|
|
hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
|
|
entry->timer.expires = jiffies + priv->vcc_timeout_period;
|
|
entry->timer.function = lec_arp_expire_vcc;
|
|
add_timer(&entry->timer);
|
|
pr_debug("After vcc was added\n");
|
|
dump_arp_table(priv);
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
}
|
|
|
|
static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_arp_table *entry;
|
|
int i;
|
|
|
|
pr_debug("%lx\n", tran_id);
|
|
restart:
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry(entry,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (entry->flush_tran_id == tran_id &&
|
|
entry->status == ESI_FLUSH_PENDING) {
|
|
struct sk_buff *skb;
|
|
struct atm_vcc *vcc = entry->vcc;
|
|
|
|
lec_arp_hold(entry);
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock,
|
|
flags);
|
|
while ((skb = skb_dequeue(&entry->tx_wait)))
|
|
lec_send(vcc, skb);
|
|
entry->last_used = jiffies;
|
|
entry->status = ESI_FORWARD_DIRECT;
|
|
lec_arp_put(entry);
|
|
pr_debug("LEC_ARP: Flushed\n");
|
|
goto restart;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
dump_arp_table(priv);
|
|
}
|
|
|
|
static void
|
|
lec_set_flush_tran_id(struct lec_priv *priv,
|
|
const unsigned char *atm_addr, unsigned long tran_id)
|
|
{
|
|
unsigned long flags;
|
|
struct lec_arp_table *entry;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
|
|
hlist_for_each_entry(entry,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
|
|
entry->flush_tran_id = tran_id;
|
|
pr_debug("Set flush transaction id to %lx for %p\n",
|
|
tran_id, entry);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
}
|
|
|
|
static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
|
|
{
|
|
unsigned long flags;
|
|
unsigned char mac_addr[] = {
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff
|
|
};
|
|
struct lec_arp_table *to_add;
|
|
struct lec_vcc_priv *vpriv;
|
|
int err = 0;
|
|
|
|
vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
|
|
if (!vpriv)
|
|
return -ENOMEM;
|
|
vpriv->xoff = 0;
|
|
vpriv->old_pop = vcc->pop;
|
|
vcc->user_back = vpriv;
|
|
vcc->pop = lec_pop;
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
to_add = make_entry(priv, mac_addr);
|
|
if (!to_add) {
|
|
vcc->pop = vpriv->old_pop;
|
|
kfree(vpriv);
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
|
|
to_add->status = ESI_FORWARD_DIRECT;
|
|
to_add->flags |= LEC_PERMANENT_FLAG;
|
|
to_add->vcc = vcc;
|
|
to_add->old_push = vcc->push;
|
|
vcc->push = lec_push;
|
|
priv->mcast_vcc = vcc;
|
|
lec_arp_add(priv, to_add);
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
return err;
|
|
}
|
|
|
|
static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
|
|
{
|
|
unsigned long flags;
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry;
|
|
int i;
|
|
|
|
pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
|
|
dump_arp_table(priv);
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
|
|
for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_tables[i], next) {
|
|
if (vcc == entry->vcc) {
|
|
lec_arp_remove(priv, entry);
|
|
lec_arp_put(entry);
|
|
if (priv->mcast_vcc == vcc)
|
|
priv->mcast_vcc = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_empty_ones, next) {
|
|
if (entry->vcc == vcc) {
|
|
lec_arp_clear_vccs(entry);
|
|
del_timer(&entry->timer);
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
}
|
|
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_no_forward, next) {
|
|
if (entry->recv_vcc == vcc) {
|
|
lec_arp_clear_vccs(entry);
|
|
del_timer(&entry->timer);
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
}
|
|
|
|
hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
|
|
if (entry->recv_vcc == vcc) {
|
|
lec_arp_clear_vccs(entry);
|
|
/* No timer, LANEv2 7.1.20 and 2.3.5.3 */
|
|
hlist_del(&entry->next);
|
|
lec_arp_put(entry);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
dump_arp_table(priv);
|
|
}
|
|
|
|
static void
|
|
lec_arp_check_empties(struct lec_priv *priv,
|
|
struct atm_vcc *vcc, struct sk_buff *skb)
|
|
{
|
|
unsigned long flags;
|
|
struct hlist_node *next;
|
|
struct lec_arp_table *entry, *tmp;
|
|
struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
|
|
unsigned char *src = hdr->h_source;
|
|
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
hlist_for_each_entry_safe(entry, next,
|
|
&priv->lec_arp_empty_ones, next) {
|
|
if (vcc == entry->vcc) {
|
|
del_timer(&entry->timer);
|
|
ether_addr_copy(entry->mac_addr, src);
|
|
entry->status = ESI_FORWARD_DIRECT;
|
|
entry->last_used = jiffies;
|
|
/* We might have got an entry */
|
|
tmp = lec_arp_find(priv, src);
|
|
if (tmp) {
|
|
lec_arp_remove(priv, tmp);
|
|
lec_arp_put(tmp);
|
|
}
|
|
hlist_del(&entry->next);
|
|
lec_arp_add(priv, entry);
|
|
goto out;
|
|
}
|
|
}
|
|
pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
|
|
out:
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|