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2237 lines
58 KiB
2237 lines
58 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* lec.c: Lan Emulation driver |
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* |
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* Marko Kiiskila <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
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|
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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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|
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/* Proxy LEC knows about bridging */ |
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#if IS_ENABLED(CONFIG_BRIDGE) |
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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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/* Hardening for Spectre-v1 */ |
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#include <linux/nospec.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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|
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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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|
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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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refcount_inc(&entry->usage); |
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} |
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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 (refcount_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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.resolve = lane2_resolve, /* spec 3.1.3 */ |
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.associate_req = lane2_associate_req, /* spec 3.1.4 */ |
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.associate_indicator = NULL /* 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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|
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/* Device structures */ |
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static struct net_device *dev_lec[MAX_LEC_ITF]; |
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|
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#if IS_ENABLED(CONFIG_BRIDGE) |
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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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|
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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 /* IS_ENABLED(CONFIG_BRIDGE) */ |
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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_account_tx(vcc, skb); |
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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, unsigned int txqueue) |
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{ |
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pr_info("%s\n", dev->name); |
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netif_trans_update(dev); |
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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 IS_ENABLED(CONFIG_BRIDGE) |
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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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netif_trans_update(dev); |
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return NETDEV_TX_OK; |
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} |
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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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static const u8 zero_addr[ETH_ALEN] = {}; |
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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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char *tmp; /* FIXME */ |
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|
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WARN_ON(refcount_sub_and_test(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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eth_hw_addr_set(dev, mesg->content.normal.mac_addr); |
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break; |
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case l_del_mac_addr: |
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eth_hw_addr_set(dev, zero_addr); |
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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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|
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if (mesg->content.normal.no_source_le_narp) |
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break; |
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fallthrough; |
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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 IS_ENABLED(CONFIG_BRIDGE) |
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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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|
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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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|
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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)); |
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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 /* IS_ENABLED(CONFIG_BRIDGE) */ |
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break; |
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default: |
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pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
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dev_kfree_skb(skb); |
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return -EINVAL; |
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} |
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dev_kfree_skb(skb); |
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return 0; |
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} |
|
|
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static void lec_atm_close(struct atm_vcc *vcc) |
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{ |
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struct sk_buff *skb; |
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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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|
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priv->lecd = NULL; |
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/* Do something needful? */ |
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|
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netif_stop_queue(dev); |
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lec_arp_destroy(priv); |
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|
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if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
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pr_info("%s closing with messages pending\n", dev->name); |
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while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
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atm_return(vcc, skb->truesize); |
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dev_kfree_skb(skb); |
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} |
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|
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pr_info("%s: Shut down!\n", dev->name); |
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module_put(THIS_MODULE); |
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} |
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|
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static const struct atmdev_ops lecdev_ops = { |
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.close = lec_atm_close, |
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.send = lec_atm_send |
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}; |
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|
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static struct atm_dev lecatm_dev = { |
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.ops = &lecdev_ops, |
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.type = "lec", |
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.number = 999, /* dummy device number */ |
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.lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
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}; |
|
|
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/* |
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* LANE2: new argument struct sk_buff *data contains |
|
* the LE_ARP based TLVs introduced in the LANE2 spec |
|
*/ |
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static int |
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send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
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const unsigned char *mac_addr, const unsigned char *atm_addr, |
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struct sk_buff *data) |
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{ |
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struct sock *sk; |
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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; |
|
} |
|
|
|
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_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) |
|
return -EINVAL; |
|
ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF); |
|
if (!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) |
|
return -EINVAL; |
|
arg = array_index_nospec(arg, MAX_LEC_ITF); |
|
if (!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) |
|
arg = 0; |
|
if (arg >= MAX_LEC_ITF) |
|
return -EINVAL; |
|
i = array_index_nospec(arg, MAX_LEC_ITF); |
|
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; |
|
dev_lec[i]->max_mtu = 18190; |
|
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) |
|
{ |
|
seq_printf(seq, "%pM ", entry->mac_addr); |
|
seq_printf(seq, "%*phN ", ATM_ESA_LEN, entry->atm_addr); |
|
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; |
|
|
|
++*pos; |
|
return lec_get_idx(state, 1); |
|
} |
|
|
|
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, |
|
}; |
|
#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_seq_private("lec", 0444, atm_proc_root, &lec_seq_ops, |
|
sizeof(struct lec_state), NULL); |
|
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; |
|
|
|
#ifdef CONFIG_PROC_FS |
|
remove_proc_entry("lec", atm_proc_root); |
|
#endif |
|
|
|
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 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(struct timer_list *t); |
|
|
|
/* |
|
* 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) { |
|
struct atm_vcc *vcc = entry->recv_vcc; |
|
struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
|
|
|
kfree(vpriv); |
|
vcc->user_back = NULL; |
|
|
|
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, 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: %*ph ", ATM_ESA_LEN, |
|
rulla->atm_addr); |
|
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: %*ph ", ATM_ESA_LEN, |
|
rulla->atm_addr); |
|
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: %*ph ", ATM_ESA_LEN, |
|
rulla->atm_addr); |
|
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: %*ph ", ATM_ESA_LEN, |
|
rulla->atm_addr); |
|
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) |
|
return NULL; |
|
ether_addr_copy(to_return->mac_addr, mac_addr); |
|
INIT_HLIST_NODE(&to_return->next); |
|
timer_setup(&to_return->timer, lec_arp_expire_arp, 0); |
|
to_return->last_used = jiffies; |
|
to_return->priv = priv; |
|
skb_queue_head_init(&to_return->tx_wait); |
|
refcount_set(&to_return->usage, 1); |
|
return to_return; |
|
} |
|
|
|
/* Arp sent timer expired */ |
|
static void lec_arp_expire_arp(struct timer_list *t) |
|
{ |
|
struct lec_arp_table *entry; |
|
|
|
entry = from_timer(entry, t, timer); |
|
|
|
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(struct timer_list *t) |
|
{ |
|
unsigned long flags; |
|
struct lec_arp_table *to_remove = from_timer(to_remove, t, timer); |
|
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: %*phN\n", |
|
ATM_ESA_LEN, ioc_data->atm_addr); |
|
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: %*phN\n", |
|
ATM_ESA_LEN, ioc_data->atm_addr); |
|
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");
|
|
|