blob: 5d2693826afb6a84f8f614129bd9c4abf2824f9e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09002 * lec.c: Lan Emulation driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Chas Williamsd44f7742006-09-29 17:11:14 -07004 * Marko Kiiskila <mkiiskila@yahoo.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 */
6
Joe Perches99824462010-01-26 11:40:00 +00007#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
8
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09009#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/kernel.h>
11#include <linux/bitops.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080012#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14/* We are ethernet device */
15#include <linux/if_ether.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <net/sock.h>
19#include <linux/skbuff.h>
20#include <linux/ip.h>
21#include <asm/byteorder.h>
Joe Perchesc48192a2010-01-26 11:40:08 +000022#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <net/arp.h>
24#include <net/dst.h>
25#include <linux/proc_fs.h>
26#include <linux/spinlock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/seq_file.h>
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029/* And atm device */
30#include <linux/atmdev.h>
31#include <linux/atmlec.h>
32
33/* Proxy LEC knows about bridging */
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -040034#if IS_ENABLED(CONFIG_BRIDGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "../bridge/br_private.h"
36
Chas Williamsd44f7742006-09-29 17:11:14 -070037static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#endif
39
40/* Modular too */
41#include <linux/module.h>
42#include <linux/init.h>
43
44#include "lec.h"
45#include "lec_arpc.h"
46#include "resources.h"
47
Chas Williamsd44f7742006-09-29 17:11:14 -070048#define DUMP_PACKETS 0 /*
49 * 0 = None,
50 * 1 = 30 first bytes
51 * 2 = Whole packet
52 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Chas Williamsd44f7742006-09-29 17:11:14 -070054#define LEC_UNRES_QUE_LEN 8 /*
55 * number of tx packets to queue for a
56 * single destination while waiting for SVC
57 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59static int lec_open(struct net_device *dev);
Stephen Hemminger3c805a22009-08-31 19:50:42 +000060static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
61 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062static int lec_close(struct net_device *dev);
Chas Williamsd44f7742006-09-29 17:11:14 -070063static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070064 const unsigned char *mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static int lec_arp_remove(struct lec_priv *priv,
Chas Williamsd44f7742006-09-29 17:11:14 -070066 struct lec_arp_table *to_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067/* LANE2 functions */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070068static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
69 const u8 *tlvs, u32 sizeoftlvs);
70static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
Chas Williamsd44f7742006-09-29 17:11:14 -070071 u8 **tlvs, u32 *sizeoftlvs);
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070072static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
73 const u8 *tlvs, u32 sizeoftlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070075static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 unsigned long permanent);
77static void lec_arp_check_empties(struct lec_priv *priv,
78 struct atm_vcc *vcc, struct sk_buff *skb);
79static void lec_arp_destroy(struct lec_priv *priv);
80static void lec_arp_init(struct lec_priv *priv);
Chas Williamsd44f7742006-09-29 17:11:14 -070081static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070082 const unsigned char *mac_to_find,
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 int is_rdesc,
84 struct lec_arp_table **ret_entry);
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070085static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
Joe Perchesc48192a2010-01-26 11:40:08 +000086 const unsigned char *atm_addr,
87 unsigned long remoteflag,
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 unsigned int targetless_le_arp);
89static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
90static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
91static void lec_set_flush_tran_id(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070092 const unsigned char *atm_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 unsigned long tran_id);
Joe Perchesc48192a2010-01-26 11:40:08 +000094static void lec_vcc_added(struct lec_priv *priv,
95 const struct atmlec_ioc *ioc_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 struct atm_vcc *vcc,
Joe Perchesc48192a2010-01-26 11:40:08 +000097 void (*old_push)(struct atm_vcc *vcc,
98 struct sk_buff *skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
100
Chas Williams33a9c2d2006-09-29 17:16:48 -0700101/* must be done under lec_arp_lock */
102static inline void lec_arp_hold(struct lec_arp_table *entry)
103{
104 atomic_inc(&entry->usage);
105}
106
107static inline void lec_arp_put(struct lec_arp_table *entry)
108{
109 if (atomic_dec_and_test(&entry->usage))
110 kfree(entry);
111}
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113static struct lane2_ops lane2_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700114 lane2_resolve, /* resolve, spec 3.1.3 */
115 lane2_associate_req, /* associate_req, spec 3.1.4 */
116 NULL /* associate indicator, spec 3.1.5 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117};
118
Chas Williamsd44f7742006-09-29 17:11:14 -0700119static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121/* Device structures */
122static struct net_device *dev_lec[MAX_LEC_ITF];
123
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -0400124#if IS_ENABLED(CONFIG_BRIDGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
126{
Chas Williamsd44f7742006-09-29 17:11:14 -0700127 char *buff;
128 struct lec_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Chas Williamsd44f7742006-09-29 17:11:14 -0700130 /*
131 * Check if this is a BPDU. If so, ask zeppelin to send
132 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
133 * as the Config BPDU has
134 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700135 buff = skb->data + skb->dev->hard_header_len;
136 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 struct sock *sk;
Chas Williamsd44f7742006-09-29 17:11:14 -0700138 struct sk_buff *skb2;
139 struct atmlec_msg *mesg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Chas Williamsd44f7742006-09-29 17:11:14 -0700141 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
142 if (skb2 == NULL)
143 return;
144 skb2->len = sizeof(struct atmlec_msg);
145 mesg = (struct atmlec_msg *)skb2->data;
146 mesg->type = l_topology_change;
147 buff += 4;
Joe Perchesc48192a2010-01-26 11:40:08 +0000148 mesg->content.normal.flag = *buff & 0x01;
149 /* 0x01 is topology change */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Wang Chen524ad0a2008-11-12 23:39:10 -0800151 priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700152 atm_force_charge(priv->lecd, skb2->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 sk = sk_atm(priv->lecd);
Chas Williamsd44f7742006-09-29 17:11:14 -0700154 skb_queue_tail(&sk->sk_receive_queue, skb2);
David S. Miller676d2362014-04-11 16:15:36 -0400155 sk->sk_data_ready(sk);
Chas Williamsd44f7742006-09-29 17:11:14 -0700156 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157}
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -0400158#endif /* IS_ENABLED(CONFIG_BRIDGE) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 * Open/initialize the netdevice. This is called (in the current kernel)
162 * sometime after booting when the 'ifconfig' program is run.
163 *
164 * This routine should set everything up anew at each open, even
165 * registers that "should" only need to be set once at boot, so that
166 * there is non-reboot way to recover if something goes wrong.
167 */
168
Chas Williamsd44f7742006-09-29 17:11:14 -0700169static int lec_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 netif_start_queue(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700172
173 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
Stephen Hemminger162619e2009-01-09 13:01:01 +0000176static void
177lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
Stephen Hemminger162619e2009-01-09 13:01:01 +0000179 struct net_device *dev = skb->dev;
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 ATM_SKB(skb)->vcc = vcc;
182 ATM_SKB(skb)->atm_options = vcc->atm_options;
183
184 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
185 if (vcc->send(vcc, skb) < 0) {
Stephen Hemminger162619e2009-01-09 13:01:01 +0000186 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 return;
188 }
189
Stephen Hemminger162619e2009-01-09 13:01:01 +0000190 dev->stats.tx_packets++;
191 dev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
193
Chas Williamsd44f7742006-09-29 17:11:14 -0700194static void lec_tx_timeout(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Joe Perches99824462010-01-26 11:40:00 +0000196 pr_info("%s\n", dev->name);
Florian Westphal860e9532016-05-03 16:33:13 +0200197 netif_trans_update(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 netif_wake_queue(dev);
199}
200
Stephen Hemminger3c805a22009-08-31 19:50:42 +0000201static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
202 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Chas Williamsd44f7742006-09-29 17:11:14 -0700204 struct sk_buff *skb2;
Wang Chen524ad0a2008-11-12 23:39:10 -0800205 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700206 struct lecdatahdr_8023 *lec_h;
207 struct atm_vcc *vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct lec_arp_table *entry;
Chas Williamsd44f7742006-09-29 17:11:14 -0700209 unsigned char *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 int min_frame_size;
Chas Williamsd44f7742006-09-29 17:11:14 -0700211 int is_rdesc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Joe Perches99824462010-01-26 11:40:00 +0000213 pr_debug("called\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700214 if (!priv->lecd) {
Joe Perchesc48192a2010-01-26 11:40:08 +0000215 pr_info("%s:No lecd attached\n", dev->name);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000216 dev->stats.tx_errors++;
Chas Williamsd44f7742006-09-29 17:11:14 -0700217 netif_stop_queue(dev);
Patrick McHardy81fbbf62009-06-12 05:34:37 +0000218 kfree_skb(skb);
219 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700220 }
221
Stephen Hemminger52240062007-08-28 15:22:09 -0700222 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
Joe Perches99824462010-01-26 11:40:00 +0000223 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
224 (long)skb_end_pointer(skb));
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -0400225#if IS_ENABLED(CONFIG_BRIDGE)
Chas Williamsd44f7742006-09-29 17:11:14 -0700226 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
227 lec_handle_bridge(skb, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228#endif
229
Chas Williamsd44f7742006-09-29 17:11:14 -0700230 /* Make sure we have room for lec_id */
231 if (skb_headroom(skb) < 2) {
Joe Perches99824462010-01-26 11:40:00 +0000232 pr_debug("reallocating skb\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700233 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
Eric Dumazet5d0ba552012-06-04 01:17:19 +0000234 if (unlikely(!skb2)) {
235 kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000236 return NETDEV_TX_OK;
Eric Dumazet5d0ba552012-06-04 01:17:19 +0000237 }
238 consume_skb(skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700239 skb = skb2;
240 }
241 skb_push(skb, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400243 /* Put le header to place */
Chas Williamsd44f7742006-09-29 17:11:14 -0700244 lec_h = (struct lecdatahdr_8023 *)skb->data;
245 lec_h->le_header = htons(priv->lecid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247#if DUMP_PACKETS >= 2
Joe Perchesc48192a2010-01-26 11:40:08 +0000248#define MAX_DUMP_SKB 99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249#elif DUMP_PACKETS >= 1
Joe Perchesc48192a2010-01-26 11:40:08 +0000250#define MAX_DUMP_SKB 30
251#endif
252#if DUMP_PACKETS >= 1
253 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
254 dev->name, skb->len, priv->lecid);
255 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
256 skb->data, min(skb->len, MAX_DUMP_SKB), true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257#endif /* DUMP_PACKETS >= 1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Chas Williamsd44f7742006-09-29 17:11:14 -0700259 /* Minimum ethernet-frame size */
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400260 min_frame_size = LEC_MINIMUM_8023_SIZE;
Chas Williamsd44f7742006-09-29 17:11:14 -0700261 if (skb->len < min_frame_size) {
262 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
263 skb2 = skb_copy_expand(skb, 0,
264 min_frame_size - skb->truesize,
265 GFP_ATOMIC);
266 dev_kfree_skb(skb);
267 if (skb2 == NULL) {
Stephen Hemminger162619e2009-01-09 13:01:01 +0000268 dev->stats.tx_dropped++;
Patrick McHardy6ed10652009-06-23 06:03:08 +0000269 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700270 }
271 skb = skb2;
272 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 skb_put(skb, min_frame_size - skb->len);
Chas Williamsd44f7742006-09-29 17:11:14 -0700274 }
275
276 /* Send to right vcc */
277 is_rdesc = 0;
278 dst = lec_h->h_dest;
Chas Williamsd44f7742006-09-29 17:11:14 -0700279 entry = NULL;
280 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
Joe Perches99824462010-01-26 11:40:00 +0000281 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
282 dev->name, vcc, vcc ? vcc->flags : 0, entry);
Chas Williamsd44f7742006-09-29 17:11:14 -0700283 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
284 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
Joe Perches99824462010-01-26 11:40:00 +0000285 pr_debug("%s:queuing packet, MAC address %pM\n",
286 dev->name, lec_h->h_dest);
Chas Williamsd44f7742006-09-29 17:11:14 -0700287 skb_queue_tail(&entry->tx_wait, skb);
288 } else {
Joe Perches99824462010-01-26 11:40:00 +0000289 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
290 dev->name, lec_h->h_dest);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000291 dev->stats.tx_dropped++;
Chas Williamsd44f7742006-09-29 17:11:14 -0700292 dev_kfree_skb(skb);
293 }
Chas Williams6656e3c2006-09-29 17:17:17 -0700294 goto out;
Chas Williamsd44f7742006-09-29 17:11:14 -0700295 }
296#if DUMP_PACKETS > 0
Joe Perchesc48192a2010-01-26 11:40:08 +0000297 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
298 dev->name, vcc->vpi, vcc->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299#endif /* DUMP_PACKETS > 0 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700300
301 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
Joe Perches99824462010-01-26 11:40:00 +0000302 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000303 lec_send(vcc, skb2);
Chas Williamsd44f7742006-09-29 17:11:14 -0700304 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Stephen Hemminger162619e2009-01-09 13:01:01 +0000306 lec_send(vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 if (!atm_may_send(vcc, 0)) {
309 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
310
311 vpriv->xoff = 1;
312 netif_stop_queue(dev);
313
314 /*
315 * vcc->pop() might have occurred in between, making
316 * the vcc usuable again. Since xmit is serialized,
317 * this is the only situation we have to re-test.
318 */
319
320 if (atm_may_send(vcc, 0))
321 netif_wake_queue(dev);
322 }
323
Chas Williams6656e3c2006-09-29 17:17:17 -0700324out:
325 if (entry)
326 lec_arp_put(entry);
Florian Westphal860e9532016-05-03 16:33:13 +0200327 netif_trans_update(dev);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000328 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
331/* The inverse routine to net_open(). */
Chas Williamsd44f7742006-09-29 17:11:14 -0700332static int lec_close(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Chas Williamsd44f7742006-09-29 17:11:14 -0700334 netif_stop_queue(dev);
335 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Chas Williamsd44f7742006-09-29 17:11:14 -0700338static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
340 unsigned long flags;
Chas Williamsd44f7742006-09-29 17:11:14 -0700341 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800342 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700343 struct atmlec_msg *mesg;
344 struct lec_arp_table *entry;
345 int i;
346 char *tmp; /* FIXME */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
Chas Williamsd44f7742006-09-29 17:11:14 -0700349 mesg = (struct atmlec_msg *)skb->data;
350 tmp = skb->data;
351 tmp += sizeof(struct atmlec_msg);
Stephen Hemminger52240062007-08-28 15:22:09 -0700352 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
Chas Williamsd44f7742006-09-29 17:11:14 -0700353 switch (mesg->type) {
354 case l_set_mac_addr:
Joe Perchesc48192a2010-01-26 11:40:08 +0000355 for (i = 0; i < 6; i++)
Chas Williamsd44f7742006-09-29 17:11:14 -0700356 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
Chas Williamsd44f7742006-09-29 17:11:14 -0700357 break;
358 case l_del_mac_addr:
Joe Perchesc48192a2010-01-26 11:40:08 +0000359 for (i = 0; i < 6; i++)
Chas Williamsd44f7742006-09-29 17:11:14 -0700360 dev->dev_addr[i] = 0;
Chas Williamsd44f7742006-09-29 17:11:14 -0700361 break;
362 case l_addr_delete:
363 lec_addr_delete(priv, mesg->content.normal.atm_addr,
364 mesg->content.normal.flag);
365 break;
366 case l_topology_change:
367 priv->topology_change = mesg->content.normal.flag;
368 break;
369 case l_flush_complete:
370 lec_flush_complete(priv, mesg->content.normal.flag);
371 break;
372 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -0700374 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
375 lec_arp_remove(priv, entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
377
Chas Williamsd44f7742006-09-29 17:11:14 -0700378 if (mesg->content.normal.no_source_le_narp)
379 break;
380 /* FALL THROUGH */
381 case l_arp_update:
382 lec_arp_update(priv, mesg->content.normal.mac_addr,
383 mesg->content.normal.atm_addr,
384 mesg->content.normal.flag,
385 mesg->content.normal.targetless_le_arp);
Joe Perches99824462010-01-26 11:40:00 +0000386 pr_debug("in l_arp_update\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700387 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
Joe Perches99824462010-01-26 11:40:00 +0000388 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
389 mesg->sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -0700390 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
391 tmp, mesg->sizeoftlvs);
392 }
393 break;
394 case l_config:
395 priv->maximum_unknown_frame_count =
396 mesg->content.config.maximum_unknown_frame_count;
397 priv->max_unknown_frame_time =
398 (mesg->content.config.max_unknown_frame_time * HZ);
399 priv->max_retry_count = mesg->content.config.max_retry_count;
400 priv->aging_time = (mesg->content.config.aging_time * HZ);
401 priv->forward_delay_time =
402 (mesg->content.config.forward_delay_time * HZ);
403 priv->arp_response_time =
404 (mesg->content.config.arp_response_time * HZ);
405 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
406 priv->path_switching_delay =
407 (mesg->content.config.path_switching_delay * HZ);
Joe Perchesc48192a2010-01-26 11:40:08 +0000408 priv->lane_version = mesg->content.config.lane_version;
409 /* LANE2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 priv->lane2_ops = NULL;
411 if (priv->lane_version > 1)
412 priv->lane2_ops = &lane2_ops;
chas williams - CONTRACTOR6df378d2014-08-14 09:19:47 -0400413 rtnl_lock();
Stephen Hemminger1f1900f2009-03-21 13:37:28 -0700414 if (dev_set_mtu(dev, mesg->content.config.mtu))
Joe Perchesc48192a2010-01-26 11:40:08 +0000415 pr_info("%s: change_mtu to %d failed\n",
416 dev->name, mesg->content.config.mtu);
chas williams - CONTRACTOR6df378d2014-08-14 09:19:47 -0400417 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 priv->is_proxy = mesg->content.config.is_proxy;
Chas Williamsd44f7742006-09-29 17:11:14 -0700419 break;
420 case l_flush_tran_id:
421 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
422 mesg->content.normal.flag);
423 break;
424 case l_set_lecid:
425 priv->lecid =
426 (unsigned short)(0xffff & mesg->content.normal.flag);
427 break;
428 case l_should_bridge:
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -0400429#if IS_ENABLED(CONFIG_BRIDGE)
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000430 {
431 pr_debug("%s: bridge zeppelin asks about %pM\n",
432 dev->name, mesg->content.proxy.mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000434 if (br_fdb_test_addr_hook == NULL)
435 break;
436
437 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
438 /* hit from bridge table, send LE_ARP_RESPONSE */
439 struct sk_buff *skb2;
440 struct sock *sk;
441
442 pr_debug("%s: entry found, responding to zeppelin\n",
443 dev->name);
444 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
445 if (skb2 == NULL)
Chas Williamsd44f7742006-09-29 17:11:14 -0700446 break;
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000447 skb2->len = sizeof(struct atmlec_msg);
448 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
449 atm_force_charge(priv->lecd, skb2->truesize);
450 sk = sk_atm(priv->lecd);
451 skb_queue_tail(&sk->sk_receive_queue, skb2);
David S. Miller676d2362014-04-11 16:15:36 -0400452 sk->sk_data_ready(sk);
Chas Williamsd44f7742006-09-29 17:11:14 -0700453 }
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000454 }
Javier Martinez Canillas9a81c342016-09-09 08:43:14 -0400455#endif /* IS_ENABLED(CONFIG_BRIDGE) */
Chas Williamsd44f7742006-09-29 17:11:14 -0700456 break;
457 default:
Joe Perchesc48192a2010-01-26 11:40:08 +0000458 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
Chas Williamsd44f7742006-09-29 17:11:14 -0700459 dev_kfree_skb(skb);
460 return -EINVAL;
461 }
462 dev_kfree_skb(skb);
463 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464}
465
Chas Williamsd44f7742006-09-29 17:11:14 -0700466static void lec_atm_close(struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467{
Chas Williamsd44f7742006-09-29 17:11:14 -0700468 struct sk_buff *skb;
469 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800470 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Chas Williamsd44f7742006-09-29 17:11:14 -0700472 priv->lecd = NULL;
473 /* Do something needful? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Chas Williamsd44f7742006-09-29 17:11:14 -0700475 netif_stop_queue(dev);
476 lec_arp_destroy(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Chas Williamsd44f7742006-09-29 17:11:14 -0700478 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
Joe Perchesc48192a2010-01-26 11:40:08 +0000479 pr_info("%s closing with messages pending\n", dev->name);
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000480 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
Chas Williamsd44f7742006-09-29 17:11:14 -0700481 atm_return(vcc, skb->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 dev_kfree_skb(skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700483 }
484
Joe Perchesc48192a2010-01-26 11:40:08 +0000485 pr_info("%s: Shut down!\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700486 module_put(THIS_MODULE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487}
488
489static struct atmdev_ops lecdev_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700490 .close = lec_atm_close,
491 .send = lec_atm_send
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492};
493
494static struct atm_dev lecatm_dev = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700495 .ops = &lecdev_ops,
496 .type = "lec",
497 .number = 999, /* dummy device number */
Milind Arun Choudhary4ef8d0a2007-04-26 01:37:44 -0700498 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499};
500
501/*
502 * LANE2: new argument struct sk_buff *data contains
503 * the LE_ARP based TLVs introduced in the LANE2 spec
504 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700505static int
506send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -0700507 const unsigned char *mac_addr, const unsigned char *atm_addr,
Chas Williamsd44f7742006-09-29 17:11:14 -0700508 struct sk_buff *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
510 struct sock *sk;
511 struct sk_buff *skb;
512 struct atmlec_msg *mesg;
513
Joe Perchesc48192a2010-01-26 11:40:08 +0000514 if (!priv || !priv->lecd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
517 if (!skb)
518 return -1;
519 skb->len = sizeof(struct atmlec_msg);
520 mesg = (struct atmlec_msg *)skb->data;
Chas Williamsd44f7742006-09-29 17:11:14 -0700521 memset(mesg, 0, sizeof(struct atmlec_msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 mesg->type = type;
Chas Williamsd44f7742006-09-29 17:11:14 -0700523 if (data != NULL)
524 mesg->sizeoftlvs = data->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (mac_addr)
David S. Miller9be68c12014-01-21 18:55:22 -0800526 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
Chas Williamsd44f7742006-09-29 17:11:14 -0700527 else
528 mesg->content.normal.targetless_le_arp = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 if (atm_addr)
530 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
531
Chas Williamsd44f7742006-09-29 17:11:14 -0700532 atm_force_charge(priv->lecd, skb->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 sk = sk_atm(priv->lecd);
534 skb_queue_tail(&sk->sk_receive_queue, skb);
David S. Miller676d2362014-04-11 16:15:36 -0400535 sk->sk_data_ready(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Chas Williamsd44f7742006-09-29 17:11:14 -0700537 if (data != NULL) {
Joe Perches99824462010-01-26 11:40:00 +0000538 pr_debug("about to send %d bytes of data\n", data->len);
Chas Williamsd44f7742006-09-29 17:11:14 -0700539 atm_force_charge(priv->lecd, data->truesize);
540 skb_queue_tail(&sk->sk_receive_queue, data);
David S. Miller676d2362014-04-11 16:15:36 -0400541 sk->sk_data_ready(sk);
Chas Williamsd44f7742006-09-29 17:11:14 -0700542 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Chas Williamsd44f7742006-09-29 17:11:14 -0700544 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545}
546
547/* shamelessly stolen from drivers/net/net_init.c */
548static int lec_change_mtu(struct net_device *dev, int new_mtu)
549{
Chas Williamsd44f7742006-09-29 17:11:14 -0700550 if ((new_mtu < 68) || (new_mtu > 18190))
551 return -EINVAL;
552 dev->mtu = new_mtu;
553 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
555
556static void lec_set_multicast_list(struct net_device *dev)
557{
Chas Williamsd44f7742006-09-29 17:11:14 -0700558 /*
559 * by default, all multicast frames arrive over the bus.
560 * eventually support selective multicast service
561 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562}
563
Stephen Hemminger004b3222009-01-09 13:01:02 +0000564static const struct net_device_ops lec_netdev_ops = {
565 .ndo_open = lec_open,
566 .ndo_stop = lec_close,
567 .ndo_start_xmit = lec_start_xmit,
568 .ndo_change_mtu = lec_change_mtu,
569 .ndo_tx_timeout = lec_tx_timeout,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000570 .ndo_set_rx_mode = lec_set_multicast_list,
Stephen Hemminger004b3222009-01-09 13:01:02 +0000571};
572
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -0700573static const unsigned char lec_ctrl_magic[] = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700574 0xff,
575 0x00,
576 0x01,
577 0x01
578};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Scott Talbert4a7097f2005-09-29 17:30:54 -0700580#define LEC_DATA_DIRECT_8023 2
581#define LEC_DATA_DIRECT_8025 3
582
583static int lec_is_data_direct(struct atm_vcc *vcc)
Chas Williamsd44f7742006-09-29 17:11:14 -0700584{
Scott Talbert4a7097f2005-09-29 17:30:54 -0700585 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
586 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
Chas Williamsd44f7742006-09-29 17:11:14 -0700587}
Scott Talbert4a7097f2005-09-29 17:30:54 -0700588
Chas Williamsd44f7742006-09-29 17:11:14 -0700589static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Scott Talbert4a7097f2005-09-29 17:30:54 -0700591 unsigned long flags;
Chas Williamsd44f7742006-09-29 17:11:14 -0700592 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800593 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
Joe Perchesc48192a2010-01-26 11:40:08 +0000595#if DUMP_PACKETS > 0
Joe Perches99824462010-01-26 11:40:00 +0000596 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
597 dev->name, vcc->vpi, vcc->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700599 if (!skb) {
Stephen Hemminger52240062007-08-28 15:22:09 -0700600 pr_debug("%s: null skb\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700601 lec_vcc_close(priv, vcc);
602 return;
603 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604#if DUMP_PACKETS >= 2
Joe Perches99824462010-01-26 11:40:00 +0000605#define MAX_SKB_DUMP 99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606#elif DUMP_PACKETS >= 1
Joe Perches99824462010-01-26 11:40:00 +0000607#define MAX_SKB_DUMP 30
608#endif
609#if DUMP_PACKETS > 0
610 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
611 dev->name, skb->len, priv->lecid);
612 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
613 skb->data, min(MAX_SKB_DUMP, skb->len), true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614#endif /* DUMP_PACKETS > 0 */
Joe Perches99824462010-01-26 11:40:00 +0000615 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
616 /* Control frame, to daemon */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 struct sock *sk = sk_atm(vcc);
618
Stephen Hemminger52240062007-08-28 15:22:09 -0700619 pr_debug("%s: To daemon\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700620 skb_queue_tail(&sk->sk_receive_queue, skb);
David S. Miller676d2362014-04-11 16:15:36 -0400621 sk->sk_data_ready(sk);
Chas Williamsd44f7742006-09-29 17:11:14 -0700622 } else { /* Data frame, queue to protocol handlers */
Scott Talbert4a7097f2005-09-29 17:30:54 -0700623 struct lec_arp_table *entry;
Chas Williamsd44f7742006-09-29 17:11:14 -0700624 unsigned char *src, *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Chas Williamsd44f7742006-09-29 17:11:14 -0700626 atm_return(vcc, skb->truesize);
Al Viro30d492d2006-11-14 21:11:29 -0800627 if (*(__be16 *) skb->data == htons(priv->lecid) ||
Chas Williamsd44f7742006-09-29 17:11:14 -0700628 !priv->lecd || !(dev->flags & IFF_UP)) {
629 /*
630 * Probably looping back, or if lecd is missing,
631 * lecd has gone down
632 */
Stephen Hemminger52240062007-08-28 15:22:09 -0700633 pr_debug("Ignoring frame...\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700634 dev_kfree_skb(skb);
635 return;
636 }
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400637 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
Scott Talbert4a7097f2005-09-29 17:30:54 -0700638
Chas Williamsd44f7742006-09-29 17:11:14 -0700639 /*
640 * If this is a Data Direct VCC, and the VCC does not match
Scott Talbert4a7097f2005-09-29 17:30:54 -0700641 * the LE_ARP cache entry, delete the LE_ARP cache entry.
642 */
643 spin_lock_irqsave(&priv->lec_arp_lock, flags);
644 if (lec_is_data_direct(vcc)) {
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400645 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
Scott Talbert4a7097f2005-09-29 17:30:54 -0700646 entry = lec_arp_find(priv, src);
647 if (entry && entry->vcc != vcc) {
648 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -0700649 lec_arp_put(entry);
Scott Talbert4a7097f2005-09-29 17:30:54 -0700650 }
651 }
652 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Chas Williamsd44f7742006-09-29 17:11:14 -0700654 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
655 !priv->is_proxy && /* Proxy wants all the packets */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 memcmp(dst, dev->dev_addr, dev->addr_len)) {
Chas Williamsd44f7742006-09-29 17:11:14 -0700657 dev_kfree_skb(skb);
658 return;
659 }
Joe Perchesc48192a2010-01-26 11:40:08 +0000660 if (!hlist_empty(&priv->lec_arp_empty_ones))
Chas Williamsd44f7742006-09-29 17:11:14 -0700661 lec_arp_check_empties(priv, vcc, skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700662 skb_pull(skb, 2); /* skip lec_id */
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400663 skb->protocol = eth_type_trans(skb, dev);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000664 dev->stats.rx_packets++;
665 dev->stats.rx_bytes += skb->len;
Chas Williamsd44f7742006-09-29 17:11:14 -0700666 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
667 netif_rx(skb);
668 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669}
670
Chas Williamsd44f7742006-09-29 17:11:14 -0700671static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672{
673 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
674 struct net_device *dev = skb->dev;
675
676 if (vpriv == NULL) {
Joe Perches99824462010-01-26 11:40:00 +0000677 pr_info("vpriv = NULL!?!?!?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 return;
679 }
680
681 vpriv->old_pop(vcc, skb);
682
683 if (vpriv->xoff && atm_may_send(vcc, 0)) {
684 vpriv->xoff = 0;
685 if (netif_running(dev) && netif_queue_stopped(dev))
686 netif_wake_queue(dev);
687 }
688}
689
Chas Williamsd44f7742006-09-29 17:11:14 -0700690static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
692 struct lec_vcc_priv *vpriv;
Chas Williamsd44f7742006-09-29 17:11:14 -0700693 int bytes_left;
694 struct atmlec_ioc ioc_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695
Chas Williamsd44f7742006-09-29 17:11:14 -0700696 /* Lecd must be up in this case */
697 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
Joe Perches99824462010-01-26 11:40:00 +0000698 if (bytes_left != 0)
699 pr_info("copy from user failed for %d bytes\n", bytes_left);
Chas Williamsd44f7742006-09-29 17:11:14 -0700700 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
701 !dev_lec[ioc_data.dev_num])
702 return -EINVAL;
Joe Perchesc48192a2010-01-26 11:40:08 +0000703 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
704 if (!vpriv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 return -ENOMEM;
706 vpriv->xoff = 0;
707 vpriv->old_pop = vcc->pop;
708 vcc->user_back = vpriv;
709 vcc->pop = lec_pop;
Wang Chen524ad0a2008-11-12 23:39:10 -0800710 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
Chas Williamsd44f7742006-09-29 17:11:14 -0700711 &ioc_data, vcc, vcc->push);
712 vcc->proto_data = dev_lec[ioc_data.dev_num];
713 vcc->push = lec_push;
714 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715}
716
Chas Williamsd44f7742006-09-29 17:11:14 -0700717static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718{
Chas Williamsd44f7742006-09-29 17:11:14 -0700719 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
720 return -EINVAL;
721 vcc->proto_data = dev_lec[arg];
Joe Perches37d66802010-11-15 11:12:33 +0000722 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723}
724
725/* Initialize device. */
Chas Williamsd44f7742006-09-29 17:11:14 -0700726static int lecd_attach(struct atm_vcc *vcc, int arg)
727{
728 int i;
729 struct lec_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Chas Williamsd44f7742006-09-29 17:11:14 -0700731 if (arg < 0)
732 i = 0;
733 else
734 i = arg;
Chas Williamsd44f7742006-09-29 17:11:14 -0700735 if (arg >= MAX_LEC_ITF)
736 return -EINVAL;
Chas Williamsd44f7742006-09-29 17:11:14 -0700737 if (!dev_lec[i]) {
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400738 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Chas Williamsd44f7742006-09-29 17:11:14 -0700740 size = sizeof(struct lec_priv);
Paul Gortmaker60eea6c2012-05-10 16:17:00 -0400741 dev_lec[i] = alloc_etherdev(size);
Chas Williamsd44f7742006-09-29 17:11:14 -0700742 if (!dev_lec[i])
743 return -ENOMEM;
chas williams - CONTRACTOReb044582009-12-04 05:19:30 +0000744 dev_lec[i]->netdev_ops = &lec_netdev_ops;
Chas Williamsd44f7742006-09-29 17:11:14 -0700745 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
746 if (register_netdev(dev_lec[i])) {
747 free_netdev(dev_lec[i]);
748 return -EINVAL;
749 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
Wang Chen524ad0a2008-11-12 23:39:10 -0800751 priv = netdev_priv(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700752 } else {
Wang Chen524ad0a2008-11-12 23:39:10 -0800753 priv = netdev_priv(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700754 if (priv->lecd)
755 return -EADDRINUSE;
756 }
757 lec_arp_init(priv);
758 priv->itfnum = i; /* LANE2 addition */
759 priv->lecd = vcc;
760 vcc->dev = &lecatm_dev;
761 vcc_insert_socket(sk_atm(vcc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Chas Williamsd44f7742006-09-29 17:11:14 -0700763 vcc->proto_data = dev_lec[i];
764 set_bit(ATM_VF_META, &vcc->flags);
765 set_bit(ATM_VF_READY, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Chas Williamsd44f7742006-09-29 17:11:14 -0700767 /* Set default values to these variables */
768 priv->maximum_unknown_frame_count = 1;
769 priv->max_unknown_frame_time = (1 * HZ);
770 priv->vcc_timeout_period = (1200 * HZ);
771 priv->max_retry_count = 1;
772 priv->aging_time = (300 * HZ);
773 priv->forward_delay_time = (15 * HZ);
774 priv->topology_change = 0;
775 priv->arp_response_time = (1 * HZ);
776 priv->flush_timeout = (4 * HZ);
777 priv->path_switching_delay = (6 * HZ);
778
Joe Perchesc48192a2010-01-26 11:40:08 +0000779 if (dev_lec[i]->flags & IFF_UP)
Chas Williamsd44f7742006-09-29 17:11:14 -0700780 netif_start_queue(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700781 __module_get(THIS_MODULE);
782 return i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783}
784
785#ifdef CONFIG_PROC_FS
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700786static const char *lec_arp_get_status_string(unsigned char status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787{
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700788 static const char *const lec_arp_status_string[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 "ESI_UNKNOWN ",
790 "ESI_ARP_PENDING ",
791 "ESI_VC_PENDING ",
792 "<Undefined> ",
793 "ESI_FLUSH_PENDING ",
794 "ESI_FORWARD_DIRECT"
795 };
796
797 if (status > ESI_FORWARD_DIRECT)
798 status = 3; /* ESI_UNDEFINED */
799 return lec_arp_status_string[status];
800}
801
802static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
803{
804 int i;
805
806 for (i = 0; i < ETH_ALEN; i++)
807 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
808 seq_printf(seq, " ");
809 for (i = 0; i < ATM_ESA_LEN; i++)
810 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
811 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
812 entry->flags & 0xffff);
813 if (entry->vcc)
814 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
815 else
Chas Williamsd44f7742006-09-29 17:11:14 -0700816 seq_printf(seq, " ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 if (entry->recv_vcc) {
818 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
819 entry->recv_vcc->vci);
Chas Williamsd44f7742006-09-29 17:11:14 -0700820 }
821 seq_putc(seq, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822}
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824struct lec_state {
825 unsigned long flags;
826 struct lec_priv *locked;
Chas Williamsd0732f62006-09-29 17:14:27 -0700827 struct hlist_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 struct net_device *dev;
829 int itf;
830 int arp_table;
831 int misc_table;
832};
833
Chas Williamsd0732f62006-09-29 17:14:27 -0700834static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 loff_t *l)
836{
Chas Williamsd0732f62006-09-29 17:14:27 -0700837 struct hlist_node *e = state->node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 if (!e)
Chas Williamsd0732f62006-09-29 17:14:27 -0700840 e = tbl->first;
Joe Perches2e1e9842008-04-10 03:33:03 -0700841 if (e == SEQ_START_TOKEN) {
Chas Williamsd0732f62006-09-29 17:14:27 -0700842 e = tbl->first;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 --*l;
844 }
Chas Williamsd0732f62006-09-29 17:14:27 -0700845
chas williams - CONTRACTOR8356f9d2014-08-12 09:00:36 -0400846 for (; e; e = e->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 if (--*l < 0)
848 break;
849 }
Chas Williamsd0732f62006-09-29 17:14:27 -0700850 state->node = e;
851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 return (*l < 0) ? state : NULL;
853}
854
855static void *lec_arp_walk(struct lec_state *state, loff_t *l,
Chas Williamsd44f7742006-09-29 17:11:14 -0700856 struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857{
858 void *v = NULL;
859 int p;
860
861 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
Chas Williamsd0732f62006-09-29 17:14:27 -0700862 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 if (v)
864 break;
865 }
866 state->arp_table = p;
867 return v;
868}
869
870static void *lec_misc_walk(struct lec_state *state, loff_t *l,
871 struct lec_priv *priv)
872{
Chas Williamsd0732f62006-09-29 17:14:27 -0700873 struct hlist_head *lec_misc_tables[] = {
874 &priv->lec_arp_empty_ones,
875 &priv->lec_no_forward,
876 &priv->mcast_fwds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 };
878 void *v = NULL;
879 int q;
880
881 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
882 v = lec_tbl_walk(state, lec_misc_tables[q], l);
883 if (v)
884 break;
885 }
886 state->misc_table = q;
887 return v;
888}
889
890static void *lec_priv_walk(struct lec_state *state, loff_t *l,
891 struct lec_priv *priv)
892{
893 if (!state->locked) {
894 state->locked = priv;
895 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
896 }
Chas Williamsd44f7742006-09-29 17:11:14 -0700897 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
899 state->locked = NULL;
900 /* Partial state reset for the next time we get called */
901 state->arp_table = state->misc_table = 0;
902 }
903 return state->locked;
904}
905
906static void *lec_itf_walk(struct lec_state *state, loff_t *l)
907{
908 struct net_device *dev;
909 void *v;
910
911 dev = state->dev ? state->dev : dev_lec[state->itf];
Wang Chen524ad0a2008-11-12 23:39:10 -0800912 v = (dev && netdev_priv(dev)) ?
913 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 if (!v && dev) {
915 dev_put(dev);
916 /* Partial state reset for the next time we get called */
917 dev = NULL;
918 }
919 state->dev = dev;
920 return v;
921}
922
923static void *lec_get_idx(struct lec_state *state, loff_t l)
924{
925 void *v = NULL;
926
927 for (; state->itf < MAX_LEC_ITF; state->itf++) {
928 v = lec_itf_walk(state, &l);
929 if (v)
930 break;
931 }
Chas Williamsd44f7742006-09-29 17:11:14 -0700932 return v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933}
934
935static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
936{
937 struct lec_state *state = seq->private;
938
939 state->itf = 0;
940 state->dev = NULL;
941 state->locked = NULL;
942 state->arp_table = 0;
943 state->misc_table = 0;
Joe Perches2e1e9842008-04-10 03:33:03 -0700944 state->node = SEQ_START_TOKEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Joe Perches2e1e9842008-04-10 03:33:03 -0700946 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947}
948
949static void lec_seq_stop(struct seq_file *seq, void *v)
950{
951 struct lec_state *state = seq->private;
952
953 if (state->dev) {
954 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
955 state->flags);
956 dev_put(state->dev);
957 }
958}
959
960static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
961{
962 struct lec_state *state = seq->private;
963
964 v = lec_get_idx(state, 1);
965 *pos += !!PTR_ERR(v);
966 return v;
967}
968
969static int lec_seq_show(struct seq_file *seq, void *v)
970{
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700971 static const char lec_banner[] =
972 "Itf MAC ATM destination"
Chas Williamsd44f7742006-09-29 17:11:14 -0700973 " Status Flags "
974 "VPI/VCI Recv VPI/VCI\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
Joe Perches2e1e9842008-04-10 03:33:03 -0700976 if (v == SEQ_START_TOKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 seq_puts(seq, lec_banner);
978 else {
979 struct lec_state *state = seq->private;
Chas Williamsd44f7742006-09-29 17:11:14 -0700980 struct net_device *dev = state->dev;
Joe Perchesc48192a2010-01-26 11:40:08 +0000981 struct lec_arp_table *entry = hlist_entry(state->node,
982 struct lec_arp_table,
983 next);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985 seq_printf(seq, "%s ", dev->name);
Chas Williamsd0732f62006-09-29 17:14:27 -0700986 lec_info(seq, entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988 return 0;
989}
990
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700991static const struct seq_operations lec_seq_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700992 .start = lec_seq_start,
993 .next = lec_seq_next,
994 .stop = lec_seq_stop,
995 .show = lec_seq_show,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996};
997
998static int lec_seq_open(struct inode *inode, struct file *file)
999{
Pavel Emelyanov9a8c09e2008-02-29 11:37:02 -08001000 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001}
1002
Arjan van de Ven9a321442007-02-12 00:55:35 -08001003static const struct file_operations lec_seq_fops = {
Chas Williamsd44f7742006-09-29 17:11:14 -07001004 .owner = THIS_MODULE,
1005 .open = lec_seq_open,
1006 .read = seq_read,
1007 .llseek = seq_lseek,
Pavel Emelyanov9a8c09e2008-02-29 11:37:02 -08001008 .release = seq_release_private,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009};
1010#endif
1011
1012static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1013{
1014 struct atm_vcc *vcc = ATM_SD(sock);
1015 int err = 0;
Chas Williamsd44f7742006-09-29 17:11:14 -07001016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 switch (cmd) {
Chas Williamsd44f7742006-09-29 17:11:14 -07001018 case ATMLEC_CTRL:
1019 case ATMLEC_MCAST:
1020 case ATMLEC_DATA:
1021 if (!capable(CAP_NET_ADMIN))
1022 return -EPERM;
1023 break;
1024 default:
1025 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 }
1027
1028 switch (cmd) {
Chas Williamsd44f7742006-09-29 17:11:14 -07001029 case ATMLEC_CTRL:
1030 err = lecd_attach(vcc, (int)arg);
1031 if (err >= 0)
1032 sock->state = SS_CONNECTED;
1033 break;
1034 case ATMLEC_MCAST:
1035 err = lec_mcast_attach(vcc, (int)arg);
1036 break;
1037 case ATMLEC_DATA:
1038 err = lec_vcc_attach(vcc, (void __user *)arg);
1039 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 }
1041
1042 return err;
1043}
1044
1045static struct atm_ioctl lane_ioctl_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -07001046 .owner = THIS_MODULE,
1047 .ioctl = lane_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048};
1049
1050static int __init lane_module_init(void)
1051{
1052#ifdef CONFIG_PROC_FS
1053 struct proc_dir_entry *p;
1054
Wang Chen16e297b2008-02-28 13:55:45 -08001055 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
Wang Chendbee0d32008-03-23 21:45:36 -07001056 if (!p) {
Joe Perches99824462010-01-26 11:40:00 +00001057 pr_err("Unable to initialize /proc/net/atm/lec\n");
Wang Chendbee0d32008-03-23 21:45:36 -07001058 return -ENOMEM;
1059 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060#endif
1061
1062 register_atm_ioctl(&lane_ioctl_ops);
Michal Marek36a9f772011-04-01 12:41:20 +02001063 pr_info("lec.c: initialized\n");
Chas Williamsd44f7742006-09-29 17:11:14 -07001064 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065}
1066
1067static void __exit lane_module_cleanup(void)
1068{
Chas Williamsd44f7742006-09-29 17:11:14 -07001069 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071 remove_proc_entry("lec", atm_proc_root);
1072
1073 deregister_atm_ioctl(&lane_ioctl_ops);
1074
Chas Williamsd44f7742006-09-29 17:11:14 -07001075 for (i = 0; i < MAX_LEC_ITF; i++) {
1076 if (dev_lec[i] != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 unregister_netdev(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -07001078 free_netdev(dev_lec[i]);
1079 dev_lec[i] = NULL;
1080 }
1081 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082}
1083
1084module_init(lane_module_init);
1085module_exit(lane_module_cleanup);
1086
1087/*
1088 * LANE2: 3.1.3, LE_RESOLVE.request
1089 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1090 * If sizeoftlvs == NULL the default TLVs associated with with this
1091 * lec will be used.
1092 * If dst_mac == NULL, targetless LE_ARP will be sent
1093 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001094static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
Chas Williamsd44f7742006-09-29 17:11:14 -07001095 u8 **tlvs, u32 *sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096{
1097 unsigned long flags;
Wang Chen524ad0a2008-11-12 23:39:10 -08001098 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -07001099 struct lec_arp_table *table;
1100 struct sk_buff *skb;
1101 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
Chas Williamsd44f7742006-09-29 17:11:14 -07001103 if (force == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -07001105 table = lec_arp_find(priv, dst_mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -07001107 if (table == NULL)
1108 return -1;
1109
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001110 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
Chas Williamsd44f7742006-09-29 17:11:14 -07001111 if (*tlvs == NULL)
1112 return -1;
1113
Chas Williamsd44f7742006-09-29 17:11:14 -07001114 *sizeoftlvs = table->sizeoftlvs;
1115
1116 return 0;
1117 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119 if (sizeoftlvs == NULL)
1120 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 else {
1123 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1124 if (skb == NULL)
1125 return -1;
1126 skb->len = *sizeoftlvs;
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001127 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1129 }
Chas Williamsd44f7742006-09-29 17:11:14 -07001130 return retval;
1131}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133/*
1134 * LANE2: 3.1.4, LE_ASSOCIATE.request
1135 * Associate the *tlvs with the *lan_dst address.
1136 * Will overwrite any previous association
1137 * Returns 1 for success, 0 for failure (out of memory)
1138 *
1139 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001140static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1141 const u8 *tlvs, u32 sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142{
Chas Williamsd44f7742006-09-29 17:11:14 -07001143 int retval;
1144 struct sk_buff *skb;
Wang Chen524ad0a2008-11-12 23:39:10 -08001145 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
Joe Perches150238e2012-05-08 18:56:50 +00001147 if (!ether_addr_equal(lan_dst, dev->dev_addr))
Joe Perchesc48192a2010-01-26 11:40:08 +00001148 return 0; /* not our mac address */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
Chas Williamsd44f7742006-09-29 17:11:14 -07001150 kfree(priv->tlvs); /* NULL if there was no previous association */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001152 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001153 if (priv->tlvs == NULL)
Joe Perchesc48192a2010-01-26 11:40:08 +00001154 return 0;
Chas Williamsd44f7742006-09-29 17:11:14 -07001155 priv->sizeoftlvs = sizeoftlvs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156
Chas Williamsd44f7742006-09-29 17:11:14 -07001157 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1158 if (skb == NULL)
1159 return 0;
1160 skb->len = sizeoftlvs;
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001161 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -07001162 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1163 if (retval != 0)
Joe Perchesc48192a2010-01-26 11:40:08 +00001164 pr_info("lec.c: lane2_associate_req() failed\n");
Chas Williamsd44f7742006-09-29 17:11:14 -07001165 /*
1166 * If the previous association has changed we must
1167 * somehow notify other LANE entities about the change
1168 */
Joe Perchesc48192a2010-01-26 11:40:08 +00001169 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170}
1171
1172/*
1173 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1174 *
1175 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001176static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1177 const u8 *tlvs, u32 sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178{
1179#if 0
Chas Williamsd44f7742006-09-29 17:11:14 -07001180 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181#endif
Wang Chen524ad0a2008-11-12 23:39:10 -08001182 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -07001183#if 0 /*
1184 * Why have the TLVs in LE_ARP entries
1185 * since we do not use them? When you
1186 * uncomment this code, make sure the
1187 * TLVs get freed when entry is killed
1188 */
1189 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
Chas Williamsd44f7742006-09-29 17:11:14 -07001191 if (entry == NULL)
1192 return; /* should not happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193
Chas Williamsd44f7742006-09-29 17:11:14 -07001194 kfree(entry->tlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001196 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001197 if (entry->tlvs == NULL)
1198 return;
Chas Williamsd44f7742006-09-29 17:11:14 -07001199 entry->sizeoftlvs = sizeoftlvs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200#endif
1201#if 0
Joe Perchesc48192a2010-01-26 11:40:08 +00001202 pr_info("\n");
1203 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -07001204 while (i < sizeoftlvs)
Joe Perchesc48192a2010-01-26 11:40:08 +00001205 pr_cont("%02x ", tlvs[i++]);
Chas Williamsd44f7742006-09-29 17:11:14 -07001206
Joe Perchesc48192a2010-01-26 11:40:08 +00001207 pr_cont("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208#endif
1209
Chas Williamsd44f7742006-09-29 17:11:14 -07001210 /* tell MPOA about the TLVs we saw */
1211 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1212 priv->lane2_ops->associate_indicator(dev, mac_addr,
1213 tlvs, sizeoftlvs);
1214 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215}
1216
1217/*
1218 * Here starts what used to lec_arpc.c
1219 *
1220 * lec_arpc.c was added here when making
1221 * lane client modular. October 1997
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 */
1223
1224#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225#include <linux/timer.h>
Joe Perchesc48192a2010-01-26 11:40:08 +00001226#include <linux/param.h>
Arun Sharma600634972011-07-26 16:09:06 -07001227#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228#include <linux/inetdevice.h>
1229#include <net/route.h>
1230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231#if 0
Joe Perchesc48192a2010-01-26 11:40:08 +00001232#define pr_debug(format, args...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233/*
Joe Perches99824462010-01-26 11:40:00 +00001234 #define pr_debug printk
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235*/
1236#endif
1237#define DEBUG_ARP_TABLE 0
1238
1239#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1240
David Howellsc4028952006-11-22 14:57:56 +00001241static void lec_arp_check_expire(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242static void lec_arp_expire_arp(unsigned long data);
1243
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001244/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 * Arp table funcs
1246 */
1247
Joe Perchesc48192a2010-01-26 11:40:08 +00001248#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
1250/*
1251 * Initialization of arp-cache
1252 */
Chas Williams1fa99612006-09-29 17:11:47 -07001253static void lec_arp_init(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
Chas Williams1fa99612006-09-29 17:11:47 -07001255 unsigned short i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Joe Perchesc48192a2010-01-26 11:40:08 +00001257 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
Chas Williamsd0732f62006-09-29 17:14:27 -07001258 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001259 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1260 INIT_HLIST_HEAD(&priv->lec_no_forward);
1261 INIT_HLIST_HEAD(&priv->mcast_fwds);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 spin_lock_init(&priv->lec_arp_lock);
David Howellsc4028952006-11-22 14:57:56 +00001263 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
Chas Williams987e46b2006-09-29 17:15:59 -07001264 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265}
1266
Chas Williams1fa99612006-09-29 17:11:47 -07001267static void lec_arp_clear_vccs(struct lec_arp_table *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268{
Chas Williams1fa99612006-09-29 17:11:47 -07001269 if (entry->vcc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 struct atm_vcc *vcc = entry->vcc;
1271 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
Chas Williams1fa99612006-09-29 17:11:47 -07001272 struct net_device *dev = (struct net_device *)vcc->proto_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
Chas Williams1fa99612006-09-29 17:11:47 -07001274 vcc->pop = vpriv->old_pop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 if (vpriv->xoff)
1276 netif_wake_queue(dev);
1277 kfree(vpriv);
1278 vcc->user_back = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07001279 vcc->push = entry->old_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 vcc_release_async(vcc, -EPIPE);
Chas Williamsd0732f62006-09-29 17:14:27 -07001281 entry->vcc = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07001282 }
1283 if (entry->recv_vcc) {
1284 entry->recv_vcc->push = entry->old_recv_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 vcc_release_async(entry->recv_vcc, -EPIPE);
Chas Williams1fa99612006-09-29 17:11:47 -07001286 entry->recv_vcc = NULL;
1287 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288}
1289
1290/*
1291 * Insert entry to lec_arp_table
1292 * LANE2: Add to the end of the list to satisfy 8.1.13
1293 */
Chas Williams1fa99612006-09-29 17:11:47 -07001294static inline void
Chas Williamsd0732f62006-09-29 17:14:27 -07001295lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296{
Chas Williamsd0732f62006-09-29 17:14:27 -07001297 struct hlist_head *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298
Chas Williamsd0732f62006-09-29 17:14:27 -07001299 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1300 hlist_add_head(&entry->next, tmp);
Chas Williams1fa99612006-09-29 17:11:47 -07001301
Joe Perches99824462010-01-26 11:40:00 +00001302 pr_debug("Added entry:%pM\n", entry->mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303}
1304
1305/*
1306 * Remove entry from lec_arp_table
1307 */
Chas Williams1fa99612006-09-29 17:11:47 -07001308static int
1309lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310{
Chas Williamsd0732f62006-09-29 17:14:27 -07001311 struct lec_arp_table *entry;
1312 int i, remove_vcc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Joe Perchesc48192a2010-01-26 11:40:08 +00001314 if (!to_remove)
Chas Williams1fa99612006-09-29 17:11:47 -07001315 return -1;
Chas Williamsd0732f62006-09-29 17:14:27 -07001316
1317 hlist_del(&to_remove->next);
Chas Williams1fa99612006-09-29 17:11:47 -07001318 del_timer(&to_remove->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Joe Perchesc48192a2010-01-26 11:40:08 +00001320 /*
1321 * If this is the only MAC connected to this VCC,
1322 * also tear down the VCC
1323 */
Chas Williams1fa99612006-09-29 17:11:47 -07001324 if (to_remove->status >= ESI_FLUSH_PENDING) {
1325 /*
1326 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1327 */
Chas Williamsd0732f62006-09-29 17:14:27 -07001328 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001329 hlist_for_each_entry(entry,
Joe Perchesc48192a2010-01-26 11:40:08 +00001330 &priv->lec_arp_tables[i], next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001331 if (memcmp(to_remove->atm_addr,
1332 entry->atm_addr, ATM_ESA_LEN) == 0) {
Chas Williams1fa99612006-09-29 17:11:47 -07001333 remove_vcc = 0;
1334 break;
1335 }
1336 }
1337 }
1338 if (remove_vcc)
1339 lec_arp_clear_vccs(to_remove);
1340 }
1341 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1342
Joe Perches99824462010-01-26 11:40:00 +00001343 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07001344 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345}
1346
1347#if DEBUG_ARP_TABLE
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -07001348static const char *get_status_string(unsigned char st)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349{
Chas Williams1fa99612006-09-29 17:11:47 -07001350 switch (st) {
1351 case ESI_UNKNOWN:
1352 return "ESI_UNKNOWN";
1353 case ESI_ARP_PENDING:
1354 return "ESI_ARP_PENDING";
1355 case ESI_VC_PENDING:
1356 return "ESI_VC_PENDING";
1357 case ESI_FLUSH_PENDING:
1358 return "ESI_FLUSH_PENDING";
1359 case ESI_FORWARD_DIRECT:
1360 return "ESI_FORWARD_DIRECT";
Chas Williams1fa99612006-09-29 17:11:47 -07001361 }
Joe Perchesc48192a2010-01-26 11:40:08 +00001362 return "<UNKNOWN>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
Chas Williams1fa99612006-09-29 17:11:47 -07001365static void dump_arp_table(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366{
Chas Williams1fa99612006-09-29 17:11:47 -07001367 struct lec_arp_table *rulla;
Chas Williamsd0732f62006-09-29 17:14:27 -07001368 char buf[256];
1369 int i, j, offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Joe Perchesc48192a2010-01-26 11:40:08 +00001371 pr_info("Dump %p:\n", priv);
Chas Williams1fa99612006-09-29 17:11:47 -07001372 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001373 hlist_for_each_entry(rulla,
Joe Perchesc48192a2010-01-26 11:40:08 +00001374 &priv->lec_arp_tables[i], next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001375 offset = 0;
1376 offset += sprintf(buf, "%d: %p\n", i, rulla);
Joe Perchesc48192a2010-01-26 11:40:08 +00001377 offset += sprintf(buf + offset, "Mac: %pM",
1378 rulla->mac_addr);
1379 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001380 for (j = 0; j < ATM_ESA_LEN; j++) {
1381 offset += sprintf(buf + offset,
1382 "%2.2x ",
1383 rulla->atm_addr[j] & 0xff);
1384 }
1385 offset += sprintf(buf + offset,
1386 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1387 rulla->vcc ? rulla->vcc->vpi : 0,
1388 rulla->vcc ? rulla->vcc->vci : 0,
1389 rulla->recv_vcc ? rulla->recv_vcc->
1390 vpi : 0,
1391 rulla->recv_vcc ? rulla->recv_vcc->
1392 vci : 0, rulla->last_used,
1393 rulla->timestamp, rulla->no_tries);
1394 offset +=
1395 sprintf(buf + offset,
1396 "Flags:%x, Packets_flooded:%x, Status: %s ",
1397 rulla->flags, rulla->packets_flooded,
1398 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001399 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001400 }
Chas Williams1fa99612006-09-29 17:11:47 -07001401 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001402
1403 if (!hlist_empty(&priv->lec_no_forward))
Joe Perchesc48192a2010-01-26 11:40:08 +00001404 pr_info("No forward\n");
Sasha Levinb67bfe02013-02-27 17:06:00 -08001405 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001406 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001407 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1408 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001409 for (j = 0; j < ATM_ESA_LEN; j++) {
1410 offset += sprintf(buf + offset, "%2.2x ",
1411 rulla->atm_addr[j] & 0xff);
1412 }
1413 offset += sprintf(buf + offset,
1414 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1415 rulla->vcc ? rulla->vcc->vpi : 0,
1416 rulla->vcc ? rulla->vcc->vci : 0,
1417 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1418 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1419 rulla->last_used,
1420 rulla->timestamp, rulla->no_tries);
1421 offset += sprintf(buf + offset,
1422 "Flags:%x, Packets_flooded:%x, Status: %s ",
1423 rulla->flags, rulla->packets_flooded,
1424 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001425 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001426 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001427
1428 if (!hlist_empty(&priv->lec_arp_empty_ones))
Joe Perchesc48192a2010-01-26 11:40:08 +00001429 pr_info("Empty ones\n");
Sasha Levinb67bfe02013-02-27 17:06:00 -08001430 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001431 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001432 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1433 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001434 for (j = 0; j < ATM_ESA_LEN; j++) {
1435 offset += sprintf(buf + offset, "%2.2x ",
1436 rulla->atm_addr[j] & 0xff);
1437 }
1438 offset += sprintf(buf + offset,
1439 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1440 rulla->vcc ? rulla->vcc->vpi : 0,
1441 rulla->vcc ? rulla->vcc->vci : 0,
1442 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1443 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1444 rulla->last_used,
1445 rulla->timestamp, rulla->no_tries);
1446 offset += sprintf(buf + offset,
1447 "Flags:%x, Packets_flooded:%x, Status: %s ",
1448 rulla->flags, rulla->packets_flooded,
1449 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001450 pr_info("%s", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001451 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
Chas Williamsd0732f62006-09-29 17:14:27 -07001453 if (!hlist_empty(&priv->mcast_fwds))
Joe Perchesc48192a2010-01-26 11:40:08 +00001454 pr_info("Multicast Forward VCCs\n");
Sasha Levinb67bfe02013-02-27 17:06:00 -08001455 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001456 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001457 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1458 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001459 for (j = 0; j < ATM_ESA_LEN; j++) {
1460 offset += sprintf(buf + offset, "%2.2x ",
1461 rulla->atm_addr[j] & 0xff);
1462 }
1463 offset += sprintf(buf + offset,
1464 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1465 rulla->vcc ? rulla->vcc->vpi : 0,
1466 rulla->vcc ? rulla->vcc->vci : 0,
1467 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1468 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1469 rulla->last_used,
1470 rulla->timestamp, rulla->no_tries);
1471 offset += sprintf(buf + offset,
1472 "Flags:%x, Packets_flooded:%x, Status: %s ",
1473 rulla->flags, rulla->packets_flooded,
1474 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001475 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478}
Chas Williamsd0732f62006-09-29 17:14:27 -07001479#else
1480#define dump_arp_table(priv) do { } while (0)
1481#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
1483/*
1484 * Destruction of arp-cache
1485 */
Chas Williams1fa99612006-09-29 17:11:47 -07001486static void lec_arp_destroy(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487{
1488 unsigned long flags;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001489 struct hlist_node *next;
Chas Williamsd0732f62006-09-29 17:14:27 -07001490 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001491 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Tejun Heoafe2c512010-12-14 16:21:17 +01001493 cancel_delayed_work_sync(&priv->lec_arp_work);
Chas Williams1fa99612006-09-29 17:11:47 -07001494
1495 /*
1496 * Remove all entries
1497 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498
1499 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001500 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001501 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001502 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001503 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001504 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001505 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001506 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
Chas Williams1fa99612006-09-29 17:11:47 -07001507 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001508
Sasha Levinb67bfe02013-02-27 17:06:00 -08001509 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001510 &priv->lec_arp_empty_ones, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001511 del_timer_sync(&entry->timer);
1512 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001513 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001514 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001515 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001516 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1517
Sasha Levinb67bfe02013-02-27 17:06:00 -08001518 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001519 &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001520 del_timer_sync(&entry->timer);
1521 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001522 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001523 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001524 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001525 INIT_HLIST_HEAD(&priv->lec_no_forward);
1526
Sasha Levinb67bfe02013-02-27 17:06:00 -08001527 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001528 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1529 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001530 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001531 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001532 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001533 INIT_HLIST_HEAD(&priv->mcast_fwds);
Chas Williams1fa99612006-09-29 17:11:47 -07001534 priv->mcast_vcc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1536}
1537
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001538/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 * Find entry by mac_address
1540 */
Chas Williams1fa99612006-09-29 17:11:47 -07001541static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001542 const unsigned char *mac_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543{
Chas Williamsd0732f62006-09-29 17:14:27 -07001544 struct hlist_head *head;
1545 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546
Joe Perches99824462010-01-26 11:40:00 +00001547 pr_debug("%pM\n", mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07001548
Chas Williamsd0732f62006-09-29 17:14:27 -07001549 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
Sasha Levinb67bfe02013-02-27 17:06:00 -08001550 hlist_for_each_entry(entry, head, next) {
Joe Perches150238e2012-05-08 18:56:50 +00001551 if (ether_addr_equal(mac_addr, entry->mac_addr))
Chas Williamsd0732f62006-09-29 17:14:27 -07001552 return entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001553 }
1554 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555}
1556
Chas Williams1fa99612006-09-29 17:11:47 -07001557static struct lec_arp_table *make_entry(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001558 const unsigned char *mac_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559{
Chas Williams1fa99612006-09-29 17:11:47 -07001560 struct lec_arp_table *to_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561
Chas Williams1fa99612006-09-29 17:11:47 -07001562 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1563 if (!to_return) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001564 pr_info("LEC: Arp entry kmalloc failed\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001565 return NULL;
1566 }
Joe Perches116e8532014-01-20 09:52:16 -08001567 ether_addr_copy(to_return->mac_addr, mac_addr);
Chas Williamsd0732f62006-09-29 17:14:27 -07001568 INIT_HLIST_NODE(&to_return->next);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08001569 setup_timer(&to_return->timer, lec_arp_expire_arp,
1570 (unsigned long)to_return);
Chas Williams1fa99612006-09-29 17:11:47 -07001571 to_return->last_used = jiffies;
1572 to_return->priv = priv;
1573 skb_queue_head_init(&to_return->tx_wait);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001574 atomic_set(&to_return->usage, 1);
Chas Williams1fa99612006-09-29 17:11:47 -07001575 return to_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576}
1577
Chas Williams1fa99612006-09-29 17:11:47 -07001578/* Arp sent timer expired */
1579static void lec_arp_expire_arp(unsigned long data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580{
Chas Williams1fa99612006-09-29 17:11:47 -07001581 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
Chas Williams1fa99612006-09-29 17:11:47 -07001583 entry = (struct lec_arp_table *)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
Joe Perches99824462010-01-26 11:40:00 +00001585 pr_debug("\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001586 if (entry->status == ESI_ARP_PENDING) {
1587 if (entry->no_tries <= entry->priv->max_retry_count) {
1588 if (entry->is_rdesc)
1589 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1590 entry->mac_addr, NULL, NULL);
1591 else
1592 send_to_lecd(entry->priv, l_arp_xmt,
1593 entry->mac_addr, NULL, NULL);
1594 entry->no_tries++;
1595 }
1596 mod_timer(&entry->timer, jiffies + (1 * HZ));
1597 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598}
1599
Chas Williams1fa99612006-09-29 17:11:47 -07001600/* Unknown/unused vcc expire, remove associated entry */
1601static void lec_arp_expire_vcc(unsigned long data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602{
1603 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07001604 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
Joe Perchese3192692012-06-03 17:41:40 +00001605 struct lec_priv *priv = to_remove->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
Chas Williams1fa99612006-09-29 17:11:47 -07001607 del_timer(&to_remove->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
Joe Perches99824462010-01-26 11:40:00 +00001609 pr_debug("%p %p: vpi:%d vci:%d\n",
1610 to_remove, priv,
1611 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1612 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
1614 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd0732f62006-09-29 17:14:27 -07001615 hlist_del(&to_remove->next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1617
Chas Williams1fa99612006-09-29 17:11:47 -07001618 lec_arp_clear_vccs(to_remove);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001619 lec_arp_put(to_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620}
1621
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001622static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1623 unsigned long now,
1624 struct lec_priv *priv)
1625{
1626 unsigned long time_to_check;
1627
1628 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1629 time_to_check = priv->forward_delay_time;
1630 else
1631 time_to_check = priv->aging_time;
1632
1633 pr_debug("About to expire: %lx - %lx > %lx\n",
1634 now, entry->last_used, time_to_check);
1635 if (time_after(now, entry->last_used + time_to_check) &&
1636 !(entry->flags & LEC_PERMANENT_FLAG) &&
1637 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1638 /* Remove entry */
1639 pr_debug("Entry timed out\n");
1640 lec_arp_remove(priv, entry);
1641 lec_arp_put(entry);
1642 } else {
1643 /* Something else */
1644 if ((entry->status == ESI_VC_PENDING ||
1645 entry->status == ESI_ARP_PENDING) &&
1646 time_after_eq(now, entry->timestamp +
1647 priv->max_unknown_frame_time)) {
1648 entry->timestamp = jiffies;
1649 entry->packets_flooded = 0;
1650 if (entry->status == ESI_VC_PENDING)
1651 send_to_lecd(priv, l_svc_setup,
1652 entry->mac_addr,
1653 entry->atm_addr,
1654 NULL);
1655 }
1656 if (entry->status == ESI_FLUSH_PENDING &&
1657 time_after_eq(now, entry->timestamp +
1658 priv->path_switching_delay)) {
1659 lec_arp_hold(entry);
1660 return true;
1661 }
1662 }
1663
1664 return false;
1665}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666/*
1667 * Expire entries.
1668 * 1. Re-set timer
1669 * 2. For each entry, delete entries that have aged past the age limit.
1670 * 3. For each entry, depending on the status of the entry, perform
1671 * the following maintenance.
1672 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1673 * tick_count is above the max_unknown_frame_time, clear
1674 * the tick_count to zero and clear the packets_flooded counter
1675 * to zero. This supports the packet rate limit per address
1676 * while flooding unknowns.
1677 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1678 * than or equal to the path_switching_delay, change the status
1679 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1680 * regardless of the progress of the flush protocol.
1681 */
David Howellsc4028952006-11-22 14:57:56 +00001682static void lec_arp_check_expire(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683{
1684 unsigned long flags;
David Howellsc4028952006-11-22 14:57:56 +00001685 struct lec_priv *priv =
1686 container_of(work, struct lec_priv, lec_arp_work.work);
Sasha Levinb67bfe02013-02-27 17:06:00 -08001687 struct hlist_node *next;
Chas Williamsd0732f62006-09-29 17:14:27 -07001688 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001689 unsigned long now;
Chas Williams1fa99612006-09-29 17:11:47 -07001690 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691
Joe Perches99824462010-01-26 11:40:00 +00001692 pr_debug("%p\n", priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 now = jiffies;
Chas Williams6656e3c2006-09-29 17:17:17 -07001694restart:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001696 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001697 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001698 &priv->lec_arp_tables[i], next) {
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001699 if (__lec_arp_check_expire(entry, now, priv)) {
1700 struct sk_buff *skb;
1701 struct atm_vcc *vcc = entry->vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001703 spin_unlock_irqrestore(&priv->lec_arp_lock,
1704 flags);
1705 while ((skb = skb_dequeue(&entry->tx_wait)))
1706 lec_send(vcc, skb);
1707 entry->last_used = jiffies;
1708 entry->status = ESI_FORWARD_DIRECT;
Chas Williams33a9c2d2006-09-29 17:16:48 -07001709 lec_arp_put(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001711 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 }
1713 }
1714 }
1715 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1716
Chas Williams987e46b2006-09-29 17:15:59 -07001717 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718}
Chas Williams1fa99612006-09-29 17:11:47 -07001719
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720/*
1721 * Try to find vcc where mac_address is attached.
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001722 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 */
Chas Williams1fa99612006-09-29 17:11:47 -07001724static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
Joe Perchesc48192a2010-01-26 11:40:08 +00001725 const unsigned char *mac_to_find,
1726 int is_rdesc,
Chas Williams1fa99612006-09-29 17:11:47 -07001727 struct lec_arp_table **ret_entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728{
1729 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07001730 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 struct atm_vcc *found;
1732
Chas Williams1fa99612006-09-29 17:11:47 -07001733 if (mac_to_find[0] & 0x01) {
1734 switch (priv->lane_version) {
1735 case 1:
1736 return priv->mcast_vcc;
Chas Williams1fa99612006-09-29 17:11:47 -07001737 case 2: /* LANE2 wants arp for multicast addresses */
Joe Perches150238e2012-05-08 18:56:50 +00001738 if (ether_addr_equal(mac_to_find, bus_mac))
Chas Williams1fa99612006-09-29 17:11:47 -07001739 return priv->mcast_vcc;
1740 break;
1741 default:
1742 break;
1743 }
1744 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745
1746 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001747 entry = lec_arp_find(priv, mac_to_find);
1748
1749 if (entry) {
1750 if (entry->status == ESI_FORWARD_DIRECT) {
1751 /* Connection Ok */
1752 entry->last_used = jiffies;
Chas Williams6656e3c2006-09-29 17:17:17 -07001753 lec_arp_hold(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001754 *ret_entry = entry;
1755 found = entry->vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001757 }
1758 /*
1759 * If the LE_ARP cache entry is still pending, reset count to 0
Scott Talbert75b895c2005-09-29 17:31:30 -07001760 * so another LE_ARP request can be made for this frame.
1761 */
Joe Perchesc48192a2010-01-26 11:40:08 +00001762 if (entry->status == ESI_ARP_PENDING)
Scott Talbert75b895c2005-09-29 17:31:30 -07001763 entry->no_tries = 0;
Chas Williams1fa99612006-09-29 17:11:47 -07001764 /*
1765 * Data direct VC not yet set up, check to see if the unknown
1766 * frame count is greater than the limit. If the limit has
1767 * not been reached, allow the caller to send packet to
1768 * BUS.
1769 */
1770 if (entry->status != ESI_FLUSH_PENDING &&
1771 entry->packets_flooded <
1772 priv->maximum_unknown_frame_count) {
1773 entry->packets_flooded++;
Joe Perches99824462010-01-26 11:40:00 +00001774 pr_debug("Flooding..\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001775 found = priv->mcast_vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001777 }
1778 /*
1779 * We got here because entry->status == ESI_FLUSH_PENDING
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 * or BUS flood limit was reached for an entry which is
1781 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1782 */
Chas Williams6656e3c2006-09-29 17:17:17 -07001783 lec_arp_hold(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001784 *ret_entry = entry;
Joe Perches99824462010-01-26 11:40:00 +00001785 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1786 entry->vcc);
Chas Williams1fa99612006-09-29 17:11:47 -07001787 found = NULL;
1788 } else {
1789 /* No matching entry was found */
1790 entry = make_entry(priv, mac_to_find);
Joe Perches99824462010-01-26 11:40:00 +00001791 pr_debug("Making entry\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001792 if (!entry) {
1793 found = priv->mcast_vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001795 }
1796 lec_arp_add(priv, entry);
1797 /* We want arp-request(s) to be sent */
1798 entry->packets_flooded = 1;
1799 entry->status = ESI_ARP_PENDING;
1800 entry->no_tries = 1;
1801 entry->last_used = entry->timestamp = jiffies;
1802 entry->is_rdesc = is_rdesc;
1803 if (entry->is_rdesc)
1804 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1805 NULL);
1806 else
1807 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1808 entry->timer.expires = jiffies + (1 * HZ);
1809 entry->timer.function = lec_arp_expire_arp;
1810 add_timer(&entry->timer);
1811 found = priv->mcast_vcc;
1812 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813
1814out:
1815 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1816 return found;
1817}
1818
1819static int
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001820lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
Chas Williams1fa99612006-09-29 17:11:47 -07001821 unsigned long permanent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822{
1823 unsigned long flags;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001824 struct hlist_node *next;
Chas Williamsd0732f62006-09-29 17:14:27 -07001825 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001826 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827
Joe Perches99824462010-01-26 11:40:00 +00001828 pr_debug("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001830 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001831 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001832 &priv->lec_arp_tables[i], next) {
1833 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1834 (permanent ||
1835 !(entry->flags & LEC_PERMANENT_FLAG))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001837 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001838 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001840 return 0;
1841 }
1842 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001844 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845}
1846
1847/*
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001848 * Notifies: Response to arp_request (atm_addr != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 */
1850static void
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001851lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1852 const unsigned char *atm_addr, unsigned long remoteflag,
Chas Williams1fa99612006-09-29 17:11:47 -07001853 unsigned int targetless_le_arp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854{
1855 unsigned long flags;
Sasha Levinb67bfe02013-02-27 17:06:00 -08001856 struct hlist_node *next;
Chas Williams1fa99612006-09-29 17:11:47 -07001857 struct lec_arp_table *entry, *tmp;
1858 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859
Joe Perches99824462010-01-26 11:40:00 +00001860 pr_debug("%smac:%pM\n",
1861 (targetless_le_arp) ? "targetless " : "", mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862
1863 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001864 entry = lec_arp_find(priv, mac_addr);
1865 if (entry == NULL && targetless_le_arp)
1866 goto out; /*
1867 * LANE2: ignore targetless LE_ARPs for which
1868 * we have no entry in the cache. 7.1.30
1869 */
Chas Williamsd0732f62006-09-29 17:14:27 -07001870 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001871 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00001872 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001873 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1874 hlist_del(&entry->next);
Chas Williams1fa99612006-09-29 17:11:47 -07001875 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07001876 tmp = lec_arp_find(priv, mac_addr);
1877 if (tmp) {
1878 del_timer(&tmp->timer);
1879 tmp->status = ESI_FORWARD_DIRECT;
1880 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1881 tmp->vcc = entry->vcc;
1882 tmp->old_push = entry->old_push;
1883 tmp->last_used = jiffies;
1884 del_timer(&entry->timer);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001885 lec_arp_put(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001886 entry = tmp;
1887 } else {
1888 entry->status = ESI_FORWARD_DIRECT;
Joe Perches116e8532014-01-20 09:52:16 -08001889 ether_addr_copy(entry->mac_addr,
1890 mac_addr);
Chas Williamsd0732f62006-09-29 17:14:27 -07001891 entry->last_used = jiffies;
1892 lec_arp_add(priv, entry);
1893 }
1894 if (remoteflag)
1895 entry->flags |= LEC_REMOTE_FLAG;
1896 else
1897 entry->flags &= ~LEC_REMOTE_FLAG;
Stephen Hemminger52240062007-08-28 15:22:09 -07001898 pr_debug("After update\n");
Chas Williamsd0732f62006-09-29 17:14:27 -07001899 dump_arp_table(priv);
1900 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001901 }
Chas Williams1fa99612006-09-29 17:11:47 -07001902 }
1903 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001904
Chas Williams1fa99612006-09-29 17:11:47 -07001905 entry = lec_arp_find(priv, mac_addr);
1906 if (!entry) {
1907 entry = make_entry(priv, mac_addr);
1908 if (!entry)
1909 goto out;
1910 entry->status = ESI_UNKNOWN;
1911 lec_arp_add(priv, entry);
1912 /* Temporary, changes before end of function */
1913 }
1914 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1915 del_timer(&entry->timer);
1916 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08001917 hlist_for_each_entry(tmp,
Joe Perchesc48192a2010-01-26 11:40:08 +00001918 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001919 if (entry != tmp &&
1920 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1921 /* Vcc to this host exists */
1922 if (tmp->status > ESI_VC_PENDING) {
1923 /*
1924 * ESI_FLUSH_PENDING,
1925 * ESI_FORWARD_DIRECT
1926 */
1927 entry->vcc = tmp->vcc;
1928 entry->old_push = tmp->old_push;
1929 }
1930 entry->status = tmp->status;
1931 break;
1932 }
1933 }
1934 }
1935 if (remoteflag)
1936 entry->flags |= LEC_REMOTE_FLAG;
1937 else
1938 entry->flags &= ~LEC_REMOTE_FLAG;
1939 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1940 entry->status = ESI_VC_PENDING;
Chas Williamsd0732f62006-09-29 17:14:27 -07001941 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
Chas Williams1fa99612006-09-29 17:11:47 -07001942 }
Stephen Hemminger52240062007-08-28 15:22:09 -07001943 pr_debug("After update2\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001944 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945out:
1946 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1947}
1948
1949/*
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001950 * Notifies: Vcc setup ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 */
1952static void
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001953lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
Chas Williams1fa99612006-09-29 17:11:47 -07001954 struct atm_vcc *vcc,
1955 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956{
1957 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07001958 struct lec_arp_table *entry;
1959 int i, found_entry = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960
1961 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Joe Perchesc48192a2010-01-26 11:40:08 +00001962 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
Chas Williams1fa99612006-09-29 17:11:47 -07001963 if (ioc_data->receive == 2) {
Stephen Hemminger52240062007-08-28 15:22:09 -07001964 pr_debug("LEC_ARP: Attaching mcast forward\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965#if 0
Chas Williams1fa99612006-09-29 17:11:47 -07001966 entry = lec_arp_find(priv, bus_mac);
1967 if (!entry) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001968 pr_info("LEC_ARP: Multicast entry not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001970 }
1971 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1972 entry->recv_vcc = vcc;
1973 entry->old_recv_push = old_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974#endif
Chas Williams1fa99612006-09-29 17:11:47 -07001975 entry = make_entry(priv, bus_mac);
1976 if (entry == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001978 del_timer(&entry->timer);
1979 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1980 entry->recv_vcc = vcc;
1981 entry->old_recv_push = old_push;
Chas Williamsd0732f62006-09-29 17:14:27 -07001982 hlist_add_head(&entry->next, &priv->mcast_fwds);
Chas Williams1fa99612006-09-29 17:11:47 -07001983 goto out;
1984 } else if (ioc_data->receive == 1) {
1985 /*
1986 * Vcc which we don't want to make default vcc,
1987 * attach it anyway.
1988 */
Joe Perches99824462010-01-26 11:40:00 +00001989 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",
1990 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1991 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1992 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1993 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1994 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1995 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1996 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1997 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1998 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
1999 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
Chas Williams1fa99612006-09-29 17:11:47 -07002000 entry = make_entry(priv, bus_mac);
2001 if (entry == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002003 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
Joe Perches19ffa562015-03-02 19:54:54 -08002004 eth_zero_addr(entry->mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07002005 entry->recv_vcc = vcc;
2006 entry->old_recv_push = old_push;
2007 entry->status = ESI_UNKNOWN;
2008 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2009 entry->timer.function = lec_arp_expire_vcc;
Chas Williamsd0732f62006-09-29 17:14:27 -07002010 hlist_add_head(&entry->next, &priv->lec_no_forward);
Chas Williams1fa99612006-09-29 17:11:47 -07002011 add_timer(&entry->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 dump_arp_table(priv);
2013 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002014 }
Joe Perches99824462010-01-26 11:40:00 +00002015 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",
2016 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2017 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2018 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2019 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2020 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2021 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2022 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2023 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2024 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2025 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
Chas Williams1fa99612006-09-29 17:11:47 -07002026 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08002027 hlist_for_each_entry(entry,
Joe Perchesc48192a2010-01-26 11:40:08 +00002028 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002029 if (memcmp
2030 (ioc_data->atm_addr, entry->atm_addr,
2031 ATM_ESA_LEN) == 0) {
Stephen Hemminger52240062007-08-28 15:22:09 -07002032 pr_debug("LEC_ARP: Attaching data direct\n");
2033 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
Joe Perches99824462010-01-26 11:40:00 +00002034 entry->vcc ? entry->vcc->vci : 0,
2035 entry->recv_vcc ? entry->recv_vcc->
2036 vci : 0);
Chas Williams1fa99612006-09-29 17:11:47 -07002037 found_entry = 1;
2038 del_timer(&entry->timer);
2039 entry->vcc = vcc;
2040 entry->old_push = old_push;
2041 if (entry->status == ESI_VC_PENDING) {
2042 if (priv->maximum_unknown_frame_count
2043 == 0)
2044 entry->status =
2045 ESI_FORWARD_DIRECT;
2046 else {
2047 entry->timestamp = jiffies;
2048 entry->status =
2049 ESI_FLUSH_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050#if 0
Chas Williams1fa99612006-09-29 17:11:47 -07002051 send_to_lecd(priv, l_flush_xmt,
2052 NULL,
2053 entry->atm_addr,
2054 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055#endif
Chas Williams1fa99612006-09-29 17:11:47 -07002056 }
2057 } else {
2058 /*
2059 * They were forming a connection
2060 * to us, and we to them. Our
2061 * ATM address is numerically lower
2062 * than theirs, so we make connection
2063 * we formed into default VCC (8.1.11).
2064 * Connection they made gets torn
2065 * down. This might confuse some
2066 * clients. Can be changed if
2067 * someone reports trouble...
2068 */
2069 ;
2070 }
2071 }
2072 }
2073 }
2074 if (found_entry) {
Stephen Hemminger52240062007-08-28 15:22:09 -07002075 pr_debug("After vcc was added\n");
Chas Williams1fa99612006-09-29 17:11:47 -07002076 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002078 }
2079 /*
2080 * Not found, snatch address from first data packet that arrives
2081 * from this vcc
2082 */
2083 entry = make_entry(priv, bus_mac);
2084 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002086 entry->vcc = vcc;
2087 entry->old_push = old_push;
2088 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
Joe Perches19ffa562015-03-02 19:54:54 -08002089 eth_zero_addr(entry->mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07002090 entry->status = ESI_UNKNOWN;
Chas Williamsd0732f62006-09-29 17:14:27 -07002091 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
Chas Williams1fa99612006-09-29 17:11:47 -07002092 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2093 entry->timer.function = lec_arp_expire_vcc;
2094 add_timer(&entry->timer);
Stephen Hemminger52240062007-08-28 15:22:09 -07002095 pr_debug("After vcc was added\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 dump_arp_table(priv);
2097out:
2098 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2099}
2100
Chas Williams1fa99612006-09-29 17:11:47 -07002101static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102{
2103 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07002104 struct lec_arp_table *entry;
2105 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106
Joe Perches99824462010-01-26 11:40:00 +00002107 pr_debug("%lx\n", tran_id);
Chas Williams6656e3c2006-09-29 17:17:17 -07002108restart:
Chas Williams1fa99612006-09-29 17:11:47 -07002109 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2110 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08002111 hlist_for_each_entry(entry,
Joe Perchesc48192a2010-01-26 11:40:08 +00002112 &priv->lec_arp_tables[i], next) {
2113 if (entry->flush_tran_id == tran_id &&
2114 entry->status == ESI_FLUSH_PENDING) {
Chas Williams1fa99612006-09-29 17:11:47 -07002115 struct sk_buff *skb;
Chas Williams6656e3c2006-09-29 17:17:17 -07002116 struct atm_vcc *vcc = entry->vcc;
Chas Williams1fa99612006-09-29 17:11:47 -07002117
Chas Williams6656e3c2006-09-29 17:17:17 -07002118 lec_arp_hold(entry);
Joe Perchesc48192a2010-01-26 11:40:08 +00002119 spin_unlock_irqrestore(&priv->lec_arp_lock,
2120 flags);
Joe Perchesb4c84ec2010-01-26 11:40:19 +00002121 while ((skb = skb_dequeue(&entry->tx_wait)))
Stephen Hemminger162619e2009-01-09 13:01:01 +00002122 lec_send(vcc, skb);
Chas Williams6656e3c2006-09-29 17:17:17 -07002123 entry->last_used = jiffies;
Chas Williams1fa99612006-09-29 17:11:47 -07002124 entry->status = ESI_FORWARD_DIRECT;
Chas Williams6656e3c2006-09-29 17:17:17 -07002125 lec_arp_put(entry);
Stephen Hemminger52240062007-08-28 15:22:09 -07002126 pr_debug("LEC_ARP: Flushed\n");
Chas Williams6656e3c2006-09-29 17:17:17 -07002127 goto restart;
Chas Williams1fa99612006-09-29 17:11:47 -07002128 }
2129 }
2130 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002132 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133}
2134
2135static void
2136lec_set_flush_tran_id(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07002137 const unsigned char *atm_addr, unsigned long tran_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138{
2139 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07002140 struct lec_arp_table *entry;
2141 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
2143 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002144 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
Sasha Levinb67bfe02013-02-27 17:06:00 -08002145 hlist_for_each_entry(entry,
Joe Perchesc48192a2010-01-26 11:40:08 +00002146 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002147 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2148 entry->flush_tran_id = tran_id;
Stephen Hemminger52240062007-08-28 15:22:09 -07002149 pr_debug("Set flush transaction id to %lx for %p\n",
Joe Perches99824462010-01-26 11:40:00 +00002150 tran_id, entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002151 }
Chas Williamsd0732f62006-09-29 17:14:27 -07002152 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2154}
2155
Chas Williams1fa99612006-09-29 17:11:47 -07002156static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157{
2158 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07002159 unsigned char mac_addr[] = {
2160 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2161 };
2162 struct lec_arp_table *to_add;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 struct lec_vcc_priv *vpriv;
2164 int err = 0;
Chas Williams1fa99612006-09-29 17:11:47 -07002165
Joe Perchesc48192a2010-01-26 11:40:08 +00002166 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2167 if (!vpriv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 return -ENOMEM;
2169 vpriv->xoff = 0;
2170 vpriv->old_pop = vcc->pop;
2171 vcc->user_back = vpriv;
Chas Williams1fa99612006-09-29 17:11:47 -07002172 vcc->pop = lec_pop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002174 to_add = make_entry(priv, mac_addr);
2175 if (!to_add) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 vcc->pop = vpriv->old_pop;
2177 kfree(vpriv);
Chas Williams1fa99612006-09-29 17:11:47 -07002178 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002180 }
2181 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2182 to_add->status = ESI_FORWARD_DIRECT;
2183 to_add->flags |= LEC_PERMANENT_FLAG;
2184 to_add->vcc = vcc;
2185 to_add->old_push = vcc->push;
2186 vcc->push = lec_push;
2187 priv->mcast_vcc = vcc;
2188 lec_arp_add(priv, to_add);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189out:
2190 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002191 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192}
2193
Chas Williams1fa99612006-09-29 17:11:47 -07002194static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195{
2196 unsigned long flags;
Sasha Levinb67bfe02013-02-27 17:06:00 -08002197 struct hlist_node *next;
Chas Williamsd0732f62006-09-29 17:14:27 -07002198 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07002199 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200
Stephen Hemminger52240062007-08-28 15:22:09 -07002201 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
Chas Williams1fa99612006-09-29 17:11:47 -07002202 dump_arp_table(priv);
Chas Williamsd0732f62006-09-29 17:14:27 -07002203
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd0732f62006-09-29 17:14:27 -07002205
Chas Williams1fa99612006-09-29 17:11:47 -07002206 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -08002207 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00002208 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002209 if (vcc == entry->vcc) {
2210 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002211 lec_arp_put(entry);
Joe Perchesc48192a2010-01-26 11:40:08 +00002212 if (priv->mcast_vcc == vcc)
Chas Williams1fa99612006-09-29 17:11:47 -07002213 priv->mcast_vcc = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07002214 }
2215 }
2216 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217
Sasha Levinb67bfe02013-02-27 17:06:00 -08002218 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00002219 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002220 if (entry->vcc == vcc) {
Chas Williams1fa99612006-09-29 17:11:47 -07002221 lec_arp_clear_vccs(entry);
2222 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07002223 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002224 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002225 }
Chas Williams1fa99612006-09-29 17:11:47 -07002226 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227
Sasha Levinb67bfe02013-02-27 17:06:00 -08002228 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00002229 &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002230 if (entry->recv_vcc == vcc) {
2231 lec_arp_clear_vccs(entry);
2232 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07002233 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002234 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002235 }
Chas Williams1fa99612006-09-29 17:11:47 -07002236 }
2237
Sasha Levinb67bfe02013-02-27 17:06:00 -08002238 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002239 if (entry->recv_vcc == vcc) {
2240 lec_arp_clear_vccs(entry);
2241 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
Chas Williamsd0732f62006-09-29 17:14:27 -07002242 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002243 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002244 }
Chas Williams1fa99612006-09-29 17:11:47 -07002245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
2247 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2248 dump_arp_table(priv);
2249}
2250
2251static void
2252lec_arp_check_empties(struct lec_priv *priv,
Chas Williams1fa99612006-09-29 17:11:47 -07002253 struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254{
Chas Williams1fa99612006-09-29 17:11:47 -07002255 unsigned long flags;
Sasha Levinb67bfe02013-02-27 17:06:00 -08002256 struct hlist_node *next;
Chas Williamsd0732f62006-09-29 17:14:27 -07002257 struct lec_arp_table *entry, *tmp;
Chas Williams1fa99612006-09-29 17:11:47 -07002258 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
Paul Gortmaker60eea6c2012-05-10 16:17:00 -04002259 unsigned char *src = hdr->h_source;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
2261 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Sasha Levinb67bfe02013-02-27 17:06:00 -08002262 hlist_for_each_entry_safe(entry, next,
Joe Perchesc48192a2010-01-26 11:40:08 +00002263 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002264 if (vcc == entry->vcc) {
2265 del_timer(&entry->timer);
Joe Perches116e8532014-01-20 09:52:16 -08002266 ether_addr_copy(entry->mac_addr, src);
Chas Williamsd0732f62006-09-29 17:14:27 -07002267 entry->status = ESI_FORWARD_DIRECT;
2268 entry->last_used = jiffies;
2269 /* We might have got an entry */
Joe Perchesc48192a2010-01-26 11:40:08 +00002270 tmp = lec_arp_find(priv, src);
2271 if (tmp) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002272 lec_arp_remove(priv, tmp);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002273 lec_arp_put(tmp);
Chas Williamsd0732f62006-09-29 17:14:27 -07002274 }
2275 hlist_del(&entry->next);
2276 lec_arp_add(priv, entry);
2277 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002278 }
Chas Williams1fa99612006-09-29 17:11:47 -07002279 }
Stephen Hemminger52240062007-08-28 15:22:09 -07002280 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281out:
2282 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2283}
Chas Williams1fa99612006-09-29 17:11:47 -07002284
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285MODULE_LICENSE("GPL");