Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

2410 lines (2163 sloc) 64.85 kb
/*
* lec.c: Lan Emulation driver
*
* Marko Kiiskila <mkiiskila@yahoo.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <linux/capability.h>
/* We are ethernet device */
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/sock.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <asm/byteorder.h>
#include <linux/uaccess.h>
#include <net/arp.h>
#include <net/dst.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/seq_file.h>
/* TokenRing if needed */
#ifdef CONFIG_TR
#include <linux/trdevice.h>
#endif
/* And atm device */
#include <linux/atmdev.h>
#include <linux/atmlec.h>
/* Proxy LEC knows about bridging */
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
#include "../bridge/br_private.h"
static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
#endif
/* Modular too */
#include <linux/module.h>
#include <linux/init.h>
#include "lec.h"
#include "lec_arpc.h"
#include "resources.h"
#define DUMP_PACKETS 0 /*
* 0 = None,
* 1 = 30 first bytes
* 2 = Whole packet
*/
#define LEC_UNRES_QUE_LEN 8 /*
* number of tx packets to queue for a
* single destination while waiting for SVC
*/
static int lec_open(struct net_device *dev);
static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
struct net_device *dev);
static int lec_close(struct net_device *dev);
static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
const unsigned char *mac_addr);
static int lec_arp_remove(struct lec_priv *priv,
struct lec_arp_table *to_remove);
/* LANE2 functions */
static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
const u8 *tlvs, u32 sizeoftlvs);
static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
u8 **tlvs, u32 *sizeoftlvs);
static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
const u8 *tlvs, u32 sizeoftlvs);
static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
unsigned long permanent);
static void lec_arp_check_empties(struct lec_priv *priv,
struct atm_vcc *vcc, struct sk_buff *skb);
static void lec_arp_destroy(struct lec_priv *priv);
static void lec_arp_init(struct lec_priv *priv);
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);
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);
static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
static void lec_set_flush_tran_id(struct lec_priv *priv,
const unsigned char *atm_addr,
unsigned long tran_id);
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));
static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
/* must be done under lec_arp_lock */
static inline void lec_arp_hold(struct lec_arp_table *entry)
{
atomic_inc(&entry->usage);
}
static inline void lec_arp_put(struct lec_arp_table *entry)
{
if (atomic_dec_and_test(&entry->usage))
kfree(entry);
}
static struct lane2_ops lane2_ops = {
lane2_resolve, /* resolve, spec 3.1.3 */
lane2_associate_req, /* associate_req, spec 3.1.4 */
NULL /* associate indicator, spec 3.1.5 */
};
static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
/* Device structures */
static struct net_device *dev_lec[MAX_LEC_ITF];
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
{
char *buff;
struct lec_priv *priv;
/*
* Check if this is a BPDU. If so, ask zeppelin to send
* LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
* as the Config BPDU has
*/
buff = skb->data + skb->dev->hard_header_len;
if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
struct sock *sk;
struct sk_buff *skb2;
struct atmlec_msg *mesg;
skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
if (skb2 == NULL)
return;
skb2->len = sizeof(struct atmlec_msg);
mesg = (struct atmlec_msg *)skb2->data;
mesg->type = l_topology_change;
buff += 4;
mesg->content.normal.flag = *buff & 0x01;
/* 0x01 is topology change */
priv = netdev_priv(dev);
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, skb2->len);
}
}
#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
/*
* Modelled after tr_type_trans
* All multicast and ARE or STE frames go to BUS.
* Non source routed frames go by destination address.
* Last hop source routed frames go by destination address.
* Not last hop source routed frames go by _next_ route descriptor.
* Returns pointer to destination MAC address or fills in rdesc
* and returns NULL.
*/
#ifdef CONFIG_TR
static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
{
struct trh_hdr *trh;
unsigned int riflen, num_rdsc;
trh = (struct trh_hdr *)packet;
if (trh->daddr[0] & (uint8_t) 0x80)
return bus_mac; /* multicast */
if (trh->saddr[0] & TR_RII) {
riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
if ((ntohs(trh->rcf) >> 13) != 0)
return bus_mac; /* ARE or STE */
} else
return trh->daddr; /* not source routed */
if (riflen < 6)
return trh->daddr; /* last hop, source routed */
/* riflen is 6 or more, packet has more than one route descriptor */
num_rdsc = (riflen / 2) - 1;
memset(rdesc, 0, ETH_ALEN);
/* offset 4 comes from LAN destination field in LE control frames */
if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
else {
memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
}
return NULL;
}
#endif /* CONFIG_TR */
/*
* Open/initialize the netdevice. This is called (in the current kernel)
* sometime after booting when the 'ifconfig' program is run.
*
* This routine should set everything up anew at each open, even
* registers that "should" only need to be set once at boot, so that
* there is non-reboot way to recover if something goes wrong.
*/
static int lec_open(struct net_device *dev)
{
netif_start_queue(dev);
return 0;
}
static void
lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
ATM_SKB(skb)->vcc = vcc;
ATM_SKB(skb)->atm_options = vcc->atm_options;
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
if (vcc->send(vcc, skb) < 0) {
dev->stats.tx_dropped++;
return;
}
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
}
static void lec_tx_timeout(struct net_device *dev)
{
pr_info("%s\n", dev->name);
dev->trans_start = jiffies;
netif_wake_queue(dev);
}
static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct sk_buff *skb2;
struct lec_priv *priv = netdev_priv(dev);
struct lecdatahdr_8023 *lec_h;
struct atm_vcc *vcc;
struct lec_arp_table *entry;
unsigned char *dst;
int min_frame_size;
#ifdef CONFIG_TR
unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
#endif
int is_rdesc;
pr_debug("called\n");
if (!priv->lecd) {
pr_info("%s:No lecd attached\n", dev->name);
dev->stats.tx_errors++;
netif_stop_queue(dev);
kfree_skb(skb);
return NETDEV_TX_OK;
}
pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
(long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
(long)skb_end_pointer(skb));
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
lec_handle_bridge(skb, dev);
#endif
/* Make sure we have room for lec_id */
if (skb_headroom(skb) < 2) {
pr_debug("reallocating skb\n");
skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
kfree_skb(skb);
if (skb2 == NULL)
return NETDEV_TX_OK;
skb = skb2;
}
skb_push(skb, 2);
/* Put le header to place, works for TokenRing too */
lec_h = (struct lecdatahdr_8023 *)skb->data;
lec_h->le_header = htons(priv->lecid);
#ifdef CONFIG_TR
/*
* Ugly. Use this to realign Token Ring packets for
* e.g. PCA-200E driver.
*/
if (priv->is_trdev) {
skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
kfree_skb(skb);
if (skb2 == NULL)
return NETDEV_TX_OK;
skb = skb2;
}
#endif
#if DUMP_PACKETS >= 2
#define MAX_DUMP_SKB 99
#elif DUMP_PACKETS >= 1
#define MAX_DUMP_SKB 30
#endif
#if DUMP_PACKETS >= 1
printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
dev->name, skb->len, priv->lecid);
print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
skb->data, min(skb->len, MAX_DUMP_SKB), true);
#endif /* DUMP_PACKETS >= 1 */
/* Minimum ethernet-frame size */
#ifdef CONFIG_TR
if (priv->is_trdev)
min_frame_size = LEC_MINIMUM_8025_SIZE;
else
#endif
min_frame_size = LEC_MINIMUM_8023_SIZE;
if (skb->len < min_frame_size) {
if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
skb2 = skb_copy_expand(skb, 0,
min_frame_size - skb->truesize,
GFP_ATOMIC);
dev_kfree_skb(skb);
if (skb2 == NULL) {
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
skb = skb2;
}
skb_put(skb, min_frame_size - skb->len);
}
/* Send to right vcc */
is_rdesc = 0;
dst = lec_h->h_dest;
#ifdef CONFIG_TR
if (priv->is_trdev) {
dst = get_tr_dst(skb->data + 2, rdesc);
if (dst == NULL) {
dst = rdesc;
is_rdesc = 1;
}
}
#endif
entry = NULL;
vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
dev->name, vcc, vcc ? vcc->flags : 0, entry);
if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
pr_debug("%s:queuing packet, MAC address %pM\n",
dev->name, lec_h->h_dest);
skb_queue_tail(&entry->tx_wait, skb);
} else {
pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
dev->name, lec_h->h_dest);
dev->stats.tx_dropped++;
dev_kfree_skb(skb);
}
goto out;
}
#if DUMP_PACKETS > 0
printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
dev->name, vcc->vpi, vcc->vci);
#endif /* DUMP_PACKETS > 0 */
while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
lec_send(vcc, skb2);
}
lec_send(vcc, skb);
if (!atm_may_send(vcc, 0)) {
struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
vpriv->xoff = 1;
netif_stop_queue(dev);
/*
* vcc->pop() might have occurred in between, making
* the vcc usuable again. Since xmit is serialized,
* this is the only situation we have to re-test.
*/
if (atm_may_send(vcc, 0))
netif_wake_queue(dev);
}
out:
if (entry)
lec_arp_put(entry);
dev->trans_start = jiffies;
return NETDEV_TX_OK;
}
/* The inverse routine to net_open(). */
static int lec_close(struct net_device *dev)
{
netif_stop_queue(dev);
return 0;
}
static int lec_atm_send(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);
struct atmlec_msg *mesg;
struct lec_arp_table *entry;
int i;
char *tmp; /* FIXME */
atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
mesg = (struct atmlec_msg *)skb->data;
tmp = skb->data;
tmp += sizeof(struct atmlec_msg);
pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
switch (mesg->type) {
case l_set_mac_addr:
for (i = 0; i < 6; i++)
dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
break;
case l_del_mac_addr:
for (i = 0; i < 6; i++)
dev->dev_addr[i] = 0;
break;
case l_addr_delete:
lec_addr_delete(priv, mesg->content.normal.atm_addr,
mesg->content.normal.flag);
break;
case l_topology_change:
priv->topology_change = mesg->content.normal.flag;
break;
case l_flush_complete:
lec_flush_complete(priv, mesg->content.normal.flag);
break;
case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
spin_lock_irqsave(&priv->lec_arp_lock, flags);
entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
lec_arp_remove(priv, entry);
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
if (mesg->content.normal.no_source_le_narp)
break;
/* FALL THROUGH */
case l_arp_update:
lec_arp_update(priv, mesg->content.normal.mac_addr,
mesg->content.normal.atm_addr,
mesg->content.normal.flag,
mesg->content.normal.targetless_le_arp);
pr_debug("in l_arp_update\n");
if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
mesg->sizeoftlvs);
lane2_associate_ind(dev, mesg->content.normal.mac_addr,
tmp, mesg->sizeoftlvs);
}
break;
case l_config:
priv->maximum_unknown_frame_count =
mesg->content.config.maximum_unknown_frame_count;
priv->max_unknown_frame_time =
(mesg->content.config.max_unknown_frame_time * HZ);
priv->max_retry_count = mesg->content.config.max_retry_count;
priv->aging_time = (mesg->content.config.aging_time * HZ);
priv->forward_delay_time =
(mesg->content.config.forward_delay_time * HZ);
priv->arp_response_time =
(mesg->content.config.arp_response_time * HZ);
priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
priv->path_switching_delay =
(mesg->content.config.path_switching_delay * HZ);
priv->lane_version = mesg->content.config.lane_version;
/* LANE2 */
priv->lane2_ops = NULL;
if (priv->lane_version > 1)
priv->lane2_ops = &lane2_ops;
if (dev_set_mtu(dev, mesg->content.config.mtu))
pr_info("%s: change_mtu to %d failed\n",
dev->name, mesg->content.config.mtu);
priv->is_proxy = mesg->content.config.is_proxy;
break;
case l_flush_tran_id:
lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
mesg->content.normal.flag);
break;
case l_set_lecid:
priv->lecid =
(unsigned short)(0xffff & mesg->content.normal.flag);
break;
case l_should_bridge:
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
{
pr_debug("%s: bridge zeppelin asks about %pM\n",
dev->name, mesg->content.proxy.mac_addr);
if (br_fdb_test_addr_hook == NULL)
break;
if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
/* hit from bridge table, send LE_ARP_RESPONSE */
struct sk_buff *skb2;
struct sock *sk;
pr_debug("%s: entry found, responding to zeppelin\n",
dev->name);
skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
if (skb2 == NULL)
break;
skb2->len = sizeof(struct atmlec_msg);
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, skb2->len);
}
}
#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)
memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
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, skb->len);
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, skb->len);
}
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, skb->len);
} 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;
}
#ifdef CONFIG_TR
if (priv->is_trdev)
dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
else
#endif
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)) {
#ifdef CONFIG_TR
if (priv->is_trdev)
src =
((struct lecdatahdr_8025 *)skb->data)->
h_source;
else
#endif
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 */
#ifdef CONFIG_TR
if (priv->is_trdev)
skb->protocol = tr_type_trans(skb, dev);
else
#endif
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;
#ifdef CONFIG_TR
if (arg >= MAX_LEC_ITF)
return -EINVAL;
#else /* Reserve the top NUM_TR_DEVS for TR */
if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
return -EINVAL;
#endif
if (!dev_lec[i]) {
int is_trdev, size;
is_trdev = 0;
if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
is_trdev = 1;
size = sizeof(struct lec_priv);
#ifdef CONFIG_TR
if (is_trdev)
dev_lec[i] = alloc_trdev(size);
else
#endif
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]);
priv->is_trdev = is_trdev;
} 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;
struct lec_arp_table *tmp;
if (!e)
e = tbl->first;
if (e == SEQ_START_TOKEN) {
e = tbl->first;
--*l;
}
hlist_for_each_entry_from(tmp, 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 (compare_ether_addr(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 hlist_node *node;
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, node,
&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 hlist_node *node;
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, node,
&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, node, &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, node, &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, node, &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 *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, node, 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, node, 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, node, 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, node, 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_node *node;
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, node, head, next) {
if (!compare_ether_addr(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;
}
memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
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 = (struct lec_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 *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, node, 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 (!compare_ether_addr(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 *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, node, 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 *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, node, 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;
memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
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, node,
&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 hlist_node *node;
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);
memset(entry->mac_addr, 0, ETH_ALEN);
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, node,
&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);
memset(entry->mac_addr, 0, ETH_ALEN);
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 hlist_node *node;
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, node,
&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 hlist_node *node;
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, node,
&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 *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, node, 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, node, 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, node, 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, node, 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 *node, *next;
struct lec_arp_table *entry, *tmp;
struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
unsigned char *src;
#ifdef CONFIG_TR
struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
if (priv->is_trdev)
src = tr_hdr->h_source;
else
#endif
src = hdr->h_source;
spin_lock_irqsave(&priv->lec_arp_lock, flags);
hlist_for_each_entry_safe(entry, node, next,
&priv->lec_arp_empty_ones, next) {
if (vcc == entry->vcc) {
del_timer(&entry->timer);
memcpy(entry->mac_addr, src, ETH_ALEN);
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");
Jump to Line
Something went wrong with that request. Please try again.