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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
29/* TokenRing if needed */
30#ifdef CONFIG_TR
31#include <linux/trdevice.h>
32#endif
33
34/* And atm device */
35#include <linux/atmdev.h>
36#include <linux/atmlec.h>
37
38/* Proxy LEC knows about bridging */
39#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "../bridge/br_private.h"
41
Chas Williamsd44f7742006-09-29 17:11:14 -070042static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#endif
44
45/* Modular too */
46#include <linux/module.h>
47#include <linux/init.h>
48
49#include "lec.h"
50#include "lec_arpc.h"
51#include "resources.h"
52
Chas Williamsd44f7742006-09-29 17:11:14 -070053#define DUMP_PACKETS 0 /*
54 * 0 = None,
55 * 1 = 30 first bytes
56 * 2 = Whole packet
57 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Chas Williamsd44f7742006-09-29 17:11:14 -070059#define LEC_UNRES_QUE_LEN 8 /*
60 * number of tx packets to queue for a
61 * single destination while waiting for SVC
62 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64static int lec_open(struct net_device *dev);
Stephen Hemminger3c805a22009-08-31 19:50:42 +000065static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
66 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067static int lec_close(struct net_device *dev);
Chas Williamsd44f7742006-09-29 17:11:14 -070068static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070069 const unsigned char *mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070static int lec_arp_remove(struct lec_priv *priv,
Chas Williamsd44f7742006-09-29 17:11:14 -070071 struct lec_arp_table *to_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/* LANE2 functions */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070073static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
74 const u8 *tlvs, u32 sizeoftlvs);
75static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
Chas Williamsd44f7742006-09-29 17:11:14 -070076 u8 **tlvs, u32 *sizeoftlvs);
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070077static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
78 const u8 *tlvs, u32 sizeoftlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070080static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 unsigned long permanent);
82static void lec_arp_check_empties(struct lec_priv *priv,
83 struct atm_vcc *vcc, struct sk_buff *skb);
84static void lec_arp_destroy(struct lec_priv *priv);
85static void lec_arp_init(struct lec_priv *priv);
Chas Williamsd44f7742006-09-29 17:11:14 -070086static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070087 const unsigned char *mac_to_find,
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 int is_rdesc,
89 struct lec_arp_table **ret_entry);
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070090static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
Joe Perchesc48192a2010-01-26 11:40:08 +000091 const unsigned char *atm_addr,
92 unsigned long remoteflag,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 unsigned int targetless_le_arp);
94static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
95static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
96static void lec_set_flush_tran_id(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -070097 const unsigned char *atm_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 unsigned long tran_id);
Joe Perchesc48192a2010-01-26 11:40:08 +000099static void lec_vcc_added(struct lec_priv *priv,
100 const struct atmlec_ioc *ioc_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 struct atm_vcc *vcc,
Joe Perchesc48192a2010-01-26 11:40:08 +0000102 void (*old_push)(struct atm_vcc *vcc,
103 struct sk_buff *skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
105
Chas Williams33a9c2d2006-09-29 17:16:48 -0700106/* must be done under lec_arp_lock */
107static inline void lec_arp_hold(struct lec_arp_table *entry)
108{
109 atomic_inc(&entry->usage);
110}
111
112static inline void lec_arp_put(struct lec_arp_table *entry)
113{
114 if (atomic_dec_and_test(&entry->usage))
115 kfree(entry);
116}
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static struct lane2_ops lane2_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700119 lane2_resolve, /* resolve, spec 3.1.3 */
120 lane2_associate_req, /* associate_req, spec 3.1.4 */
121 NULL /* associate indicator, spec 3.1.5 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122};
123
Chas Williamsd44f7742006-09-29 17:11:14 -0700124static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126/* Device structures */
127static struct net_device *dev_lec[MAX_LEC_ITF];
128
129#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
130static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
131{
Chas Williamsd44f7742006-09-29 17:11:14 -0700132 char *buff;
133 struct lec_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Chas Williamsd44f7742006-09-29 17:11:14 -0700135 /*
136 * Check if this is a BPDU. If so, ask zeppelin to send
137 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
138 * as the Config BPDU has
139 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700140 buff = skb->data + skb->dev->hard_header_len;
141 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 struct sock *sk;
Chas Williamsd44f7742006-09-29 17:11:14 -0700143 struct sk_buff *skb2;
144 struct atmlec_msg *mesg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Chas Williamsd44f7742006-09-29 17:11:14 -0700146 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
147 if (skb2 == NULL)
148 return;
149 skb2->len = sizeof(struct atmlec_msg);
150 mesg = (struct atmlec_msg *)skb2->data;
151 mesg->type = l_topology_change;
152 buff += 4;
Joe Perchesc48192a2010-01-26 11:40:08 +0000153 mesg->content.normal.flag = *buff & 0x01;
154 /* 0x01 is topology change */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Wang Chen524ad0a2008-11-12 23:39:10 -0800156 priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700157 atm_force_charge(priv->lecd, skb2->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 sk = sk_atm(priv->lecd);
Chas Williamsd44f7742006-09-29 17:11:14 -0700159 skb_queue_tail(&sk->sk_receive_queue, skb2);
160 sk->sk_data_ready(sk, skb2->len);
161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
163#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
164
165/*
166 * Modelled after tr_type_trans
167 * All multicast and ARE or STE frames go to BUS.
168 * Non source routed frames go by destination address.
169 * Last hop source routed frames go by destination address.
170 * Not last hop source routed frames go by _next_ route descriptor.
171 * Returns pointer to destination MAC address or fills in rdesc
172 * and returns NULL.
173 */
174#ifdef CONFIG_TR
175static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
176{
Chas Williamsd44f7742006-09-29 17:11:14 -0700177 struct trh_hdr *trh;
Eric Dumazet5c17d5f2008-01-15 03:29:50 -0800178 unsigned int riflen, num_rdsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Chas Williamsd44f7742006-09-29 17:11:14 -0700180 trh = (struct trh_hdr *)packet;
181 if (trh->daddr[0] & (uint8_t) 0x80)
182 return bus_mac; /* multicast */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Chas Williamsd44f7742006-09-29 17:11:14 -0700184 if (trh->saddr[0] & TR_RII) {
185 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
186 if ((ntohs(trh->rcf) >> 13) != 0)
187 return bus_mac; /* ARE or STE */
188 } else
189 return trh->daddr; /* not source routed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Chas Williamsd44f7742006-09-29 17:11:14 -0700191 if (riflen < 6)
192 return trh->daddr; /* last hop, source routed */
193
194 /* riflen is 6 or more, packet has more than one route descriptor */
195 num_rdsc = (riflen / 2) - 1;
196 memset(rdesc, 0, ETH_ALEN);
197 /* offset 4 comes from LAN destination field in LE control frames */
198 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
Al Viro30d492d2006-11-14 21:11:29 -0800199 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
Chas Williamsd44f7742006-09-29 17:11:14 -0700200 else {
Al Viro30d492d2006-11-14 21:11:29 -0800201 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
Chas Williamsd44f7742006-09-29 17:11:14 -0700202 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
203 }
204
205 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206}
207#endif /* CONFIG_TR */
208
209/*
210 * Open/initialize the netdevice. This is called (in the current kernel)
211 * sometime after booting when the 'ifconfig' program is run.
212 *
213 * This routine should set everything up anew at each open, even
214 * registers that "should" only need to be set once at boot, so that
215 * there is non-reboot way to recover if something goes wrong.
216 */
217
Chas Williamsd44f7742006-09-29 17:11:14 -0700218static int lec_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 netif_start_queue(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700221
222 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223}
224
Stephen Hemminger162619e2009-01-09 13:01:01 +0000225static void
226lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
Stephen Hemminger162619e2009-01-09 13:01:01 +0000228 struct net_device *dev = skb->dev;
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 ATM_SKB(skb)->vcc = vcc;
231 ATM_SKB(skb)->atm_options = vcc->atm_options;
232
233 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
234 if (vcc->send(vcc, skb) < 0) {
Stephen Hemminger162619e2009-01-09 13:01:01 +0000235 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 return;
237 }
238
Stephen Hemminger162619e2009-01-09 13:01:01 +0000239 dev->stats.tx_packets++;
240 dev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Chas Williamsd44f7742006-09-29 17:11:14 -0700243static void lec_tx_timeout(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
Joe Perches99824462010-01-26 11:40:00 +0000245 pr_info("%s\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 dev->trans_start = jiffies;
247 netif_wake_queue(dev);
248}
249
Stephen Hemminger3c805a22009-08-31 19:50:42 +0000250static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
251 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Chas Williamsd44f7742006-09-29 17:11:14 -0700253 struct sk_buff *skb2;
Wang Chen524ad0a2008-11-12 23:39:10 -0800254 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700255 struct lecdatahdr_8023 *lec_h;
256 struct atm_vcc *vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 struct lec_arp_table *entry;
Chas Williamsd44f7742006-09-29 17:11:14 -0700258 unsigned char *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 int min_frame_size;
260#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700261 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700263 int is_rdesc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Joe Perches99824462010-01-26 11:40:00 +0000265 pr_debug("called\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700266 if (!priv->lecd) {
Joe Perchesc48192a2010-01-26 11:40:08 +0000267 pr_info("%s:No lecd attached\n", dev->name);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000268 dev->stats.tx_errors++;
Chas Williamsd44f7742006-09-29 17:11:14 -0700269 netif_stop_queue(dev);
Patrick McHardy81fbbf62009-06-12 05:34:37 +0000270 kfree_skb(skb);
271 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700272 }
273
Stephen Hemminger52240062007-08-28 15:22:09 -0700274 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
Joe Perches99824462010-01-26 11:40:00 +0000275 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
276 (long)skb_end_pointer(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
Chas Williamsd44f7742006-09-29 17:11:14 -0700278 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
279 lec_handle_bridge(skb, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280#endif
281
Chas Williamsd44f7742006-09-29 17:11:14 -0700282 /* Make sure we have room for lec_id */
283 if (skb_headroom(skb) < 2) {
Joe Perches99824462010-01-26 11:40:00 +0000284 pr_debug("reallocating skb\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700285 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
286 kfree_skb(skb);
287 if (skb2 == NULL)
Patrick McHardy6ed10652009-06-23 06:03:08 +0000288 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700289 skb = skb2;
290 }
291 skb_push(skb, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Chas Williamsd44f7742006-09-29 17:11:14 -0700293 /* Put le header to place, works for TokenRing too */
294 lec_h = (struct lecdatahdr_8023 *)skb->data;
295 lec_h->le_header = htons(priv->lecid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700298 /*
299 * Ugly. Use this to realign Token Ring packets for
300 * e.g. PCA-200E driver.
301 */
302 if (priv->is_trdev) {
303 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
304 kfree_skb(skb);
305 if (skb2 == NULL)
Patrick McHardy6ed10652009-06-23 06:03:08 +0000306 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700307 skb = skb2;
308 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309#endif
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311#if DUMP_PACKETS >= 2
Joe Perchesc48192a2010-01-26 11:40:08 +0000312#define MAX_DUMP_SKB 99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313#elif DUMP_PACKETS >= 1
Joe Perchesc48192a2010-01-26 11:40:08 +0000314#define MAX_DUMP_SKB 30
315#endif
316#if DUMP_PACKETS >= 1
317 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
318 dev->name, skb->len, priv->lecid);
319 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
320 skb->data, min(skb->len, MAX_DUMP_SKB), true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321#endif /* DUMP_PACKETS >= 1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Chas Williamsd44f7742006-09-29 17:11:14 -0700323 /* Minimum ethernet-frame size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700325 if (priv->is_trdev)
326 min_frame_size = LEC_MINIMUM_8025_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 else
328#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700329 min_frame_size = LEC_MINIMUM_8023_SIZE;
330 if (skb->len < min_frame_size) {
331 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
332 skb2 = skb_copy_expand(skb, 0,
333 min_frame_size - skb->truesize,
334 GFP_ATOMIC);
335 dev_kfree_skb(skb);
336 if (skb2 == NULL) {
Stephen Hemminger162619e2009-01-09 13:01:01 +0000337 dev->stats.tx_dropped++;
Patrick McHardy6ed10652009-06-23 06:03:08 +0000338 return NETDEV_TX_OK;
Chas Williamsd44f7742006-09-29 17:11:14 -0700339 }
340 skb = skb2;
341 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 skb_put(skb, min_frame_size - skb->len);
Chas Williamsd44f7742006-09-29 17:11:14 -0700343 }
344
345 /* Send to right vcc */
346 is_rdesc = 0;
347 dst = lec_h->h_dest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700349 if (priv->is_trdev) {
350 dst = get_tr_dst(skb->data + 2, rdesc);
351 if (dst == NULL) {
352 dst = rdesc;
353 is_rdesc = 1;
354 }
355 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700357 entry = NULL;
358 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
Joe Perches99824462010-01-26 11:40:00 +0000359 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
360 dev->name, vcc, vcc ? vcc->flags : 0, entry);
Chas Williamsd44f7742006-09-29 17:11:14 -0700361 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
362 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
Joe Perches99824462010-01-26 11:40:00 +0000363 pr_debug("%s:queuing packet, MAC address %pM\n",
364 dev->name, lec_h->h_dest);
Chas Williamsd44f7742006-09-29 17:11:14 -0700365 skb_queue_tail(&entry->tx_wait, skb);
366 } else {
Joe Perches99824462010-01-26 11:40:00 +0000367 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
368 dev->name, lec_h->h_dest);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000369 dev->stats.tx_dropped++;
Chas Williamsd44f7742006-09-29 17:11:14 -0700370 dev_kfree_skb(skb);
371 }
Chas Williams6656e3c2006-09-29 17:17:17 -0700372 goto out;
Chas Williamsd44f7742006-09-29 17:11:14 -0700373 }
374#if DUMP_PACKETS > 0
Joe Perchesc48192a2010-01-26 11:40:08 +0000375 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
376 dev->name, vcc->vpi, vcc->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377#endif /* DUMP_PACKETS > 0 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700378
379 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
Joe Perches99824462010-01-26 11:40:00 +0000380 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000381 lec_send(vcc, skb2);
Chas Williamsd44f7742006-09-29 17:11:14 -0700382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Stephen Hemminger162619e2009-01-09 13:01:01 +0000384 lec_send(vcc, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 if (!atm_may_send(vcc, 0)) {
387 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
388
389 vpriv->xoff = 1;
390 netif_stop_queue(dev);
391
392 /*
393 * vcc->pop() might have occurred in between, making
394 * the vcc usuable again. Since xmit is serialized,
395 * this is the only situation we have to re-test.
396 */
397
398 if (atm_may_send(vcc, 0))
399 netif_wake_queue(dev);
400 }
401
Chas Williams6656e3c2006-09-29 17:17:17 -0700402out:
403 if (entry)
404 lec_arp_put(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 dev->trans_start = jiffies;
Patrick McHardy6ed10652009-06-23 06:03:08 +0000406 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
408
409/* The inverse routine to net_open(). */
Chas Williamsd44f7742006-09-29 17:11:14 -0700410static int lec_close(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Chas Williamsd44f7742006-09-29 17:11:14 -0700412 netif_stop_queue(dev);
413 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414}
415
Chas Williamsd44f7742006-09-29 17:11:14 -0700416static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{
418 unsigned long flags;
Chas Williamsd44f7742006-09-29 17:11:14 -0700419 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800420 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -0700421 struct atmlec_msg *mesg;
422 struct lec_arp_table *entry;
423 int i;
424 char *tmp; /* FIXME */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
Chas Williamsd44f7742006-09-29 17:11:14 -0700427 mesg = (struct atmlec_msg *)skb->data;
428 tmp = skb->data;
429 tmp += sizeof(struct atmlec_msg);
Stephen Hemminger52240062007-08-28 15:22:09 -0700430 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
Chas Williamsd44f7742006-09-29 17:11:14 -0700431 switch (mesg->type) {
432 case l_set_mac_addr:
Joe Perchesc48192a2010-01-26 11:40:08 +0000433 for (i = 0; i < 6; i++)
Chas Williamsd44f7742006-09-29 17:11:14 -0700434 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
Chas Williamsd44f7742006-09-29 17:11:14 -0700435 break;
436 case l_del_mac_addr:
Joe Perchesc48192a2010-01-26 11:40:08 +0000437 for (i = 0; i < 6; i++)
Chas Williamsd44f7742006-09-29 17:11:14 -0700438 dev->dev_addr[i] = 0;
Chas Williamsd44f7742006-09-29 17:11:14 -0700439 break;
440 case l_addr_delete:
441 lec_addr_delete(priv, mesg->content.normal.atm_addr,
442 mesg->content.normal.flag);
443 break;
444 case l_topology_change:
445 priv->topology_change = mesg->content.normal.flag;
446 break;
447 case l_flush_complete:
448 lec_flush_complete(priv, mesg->content.normal.flag);
449 break;
450 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -0700452 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
453 lec_arp_remove(priv, entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
455
Chas Williamsd44f7742006-09-29 17:11:14 -0700456 if (mesg->content.normal.no_source_le_narp)
457 break;
458 /* FALL THROUGH */
459 case l_arp_update:
460 lec_arp_update(priv, mesg->content.normal.mac_addr,
461 mesg->content.normal.atm_addr,
462 mesg->content.normal.flag,
463 mesg->content.normal.targetless_le_arp);
Joe Perches99824462010-01-26 11:40:00 +0000464 pr_debug("in l_arp_update\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700465 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
Joe Perches99824462010-01-26 11:40:00 +0000466 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
467 mesg->sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -0700468 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
469 tmp, mesg->sizeoftlvs);
470 }
471 break;
472 case l_config:
473 priv->maximum_unknown_frame_count =
474 mesg->content.config.maximum_unknown_frame_count;
475 priv->max_unknown_frame_time =
476 (mesg->content.config.max_unknown_frame_time * HZ);
477 priv->max_retry_count = mesg->content.config.max_retry_count;
478 priv->aging_time = (mesg->content.config.aging_time * HZ);
479 priv->forward_delay_time =
480 (mesg->content.config.forward_delay_time * HZ);
481 priv->arp_response_time =
482 (mesg->content.config.arp_response_time * HZ);
483 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
484 priv->path_switching_delay =
485 (mesg->content.config.path_switching_delay * HZ);
Joe Perchesc48192a2010-01-26 11:40:08 +0000486 priv->lane_version = mesg->content.config.lane_version;
487 /* LANE2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 priv->lane2_ops = NULL;
489 if (priv->lane_version > 1)
490 priv->lane2_ops = &lane2_ops;
Stephen Hemminger1f1900f2009-03-21 13:37:28 -0700491 if (dev_set_mtu(dev, mesg->content.config.mtu))
Joe Perchesc48192a2010-01-26 11:40:08 +0000492 pr_info("%s: change_mtu to %d failed\n",
493 dev->name, mesg->content.config.mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 priv->is_proxy = mesg->content.config.is_proxy;
Chas Williamsd44f7742006-09-29 17:11:14 -0700495 break;
496 case l_flush_tran_id:
497 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
498 mesg->content.normal.flag);
499 break;
500 case l_set_lecid:
501 priv->lecid =
502 (unsigned short)(0xffff & mesg->content.normal.flag);
503 break;
504 case l_should_bridge:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000506 {
507 pr_debug("%s: bridge zeppelin asks about %pM\n",
508 dev->name, mesg->content.proxy.mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000510 if (br_fdb_test_addr_hook == NULL)
511 break;
512
513 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
514 /* hit from bridge table, send LE_ARP_RESPONSE */
515 struct sk_buff *skb2;
516 struct sock *sk;
517
518 pr_debug("%s: entry found, responding to zeppelin\n",
519 dev->name);
520 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
521 if (skb2 == NULL)
Chas Williamsd44f7742006-09-29 17:11:14 -0700522 break;
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000523 skb2->len = sizeof(struct atmlec_msg);
524 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
525 atm_force_charge(priv->lecd, skb2->truesize);
526 sk = sk_atm(priv->lecd);
527 skb_queue_tail(&sk->sk_receive_queue, skb2);
528 sk->sk_data_ready(sk, skb2->len);
Chas Williamsd44f7742006-09-29 17:11:14 -0700529 }
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000530 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
Chas Williamsd44f7742006-09-29 17:11:14 -0700532 break;
533 default:
Joe Perchesc48192a2010-01-26 11:40:08 +0000534 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
Chas Williamsd44f7742006-09-29 17:11:14 -0700535 dev_kfree_skb(skb);
536 return -EINVAL;
537 }
538 dev_kfree_skb(skb);
539 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540}
541
Chas Williamsd44f7742006-09-29 17:11:14 -0700542static void lec_atm_close(struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543{
Chas Williamsd44f7742006-09-29 17:11:14 -0700544 struct sk_buff *skb;
545 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800546 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Chas Williamsd44f7742006-09-29 17:11:14 -0700548 priv->lecd = NULL;
549 /* Do something needful? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Chas Williamsd44f7742006-09-29 17:11:14 -0700551 netif_stop_queue(dev);
552 lec_arp_destroy(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Chas Williamsd44f7742006-09-29 17:11:14 -0700554 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
Joe Perchesc48192a2010-01-26 11:40:08 +0000555 pr_info("%s closing with messages pending\n", dev->name);
Joe Perchesb4c84ec2010-01-26 11:40:19 +0000556 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
Chas Williamsd44f7742006-09-29 17:11:14 -0700557 atm_return(vcc, skb->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 dev_kfree_skb(skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700559 }
560
Joe Perchesc48192a2010-01-26 11:40:08 +0000561 pr_info("%s: Shut down!\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700562 module_put(THIS_MODULE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563}
564
565static struct atmdev_ops lecdev_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700566 .close = lec_atm_close,
567 .send = lec_atm_send
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568};
569
570static struct atm_dev lecatm_dev = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700571 .ops = &lecdev_ops,
572 .type = "lec",
573 .number = 999, /* dummy device number */
Milind Arun Choudhary4ef8d0a2007-04-26 01:37:44 -0700574 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575};
576
577/*
578 * LANE2: new argument struct sk_buff *data contains
579 * the LE_ARP based TLVs introduced in the LANE2 spec
580 */
Chas Williamsd44f7742006-09-29 17:11:14 -0700581static int
582send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -0700583 const unsigned char *mac_addr, const unsigned char *atm_addr,
Chas Williamsd44f7742006-09-29 17:11:14 -0700584 struct sk_buff *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
586 struct sock *sk;
587 struct sk_buff *skb;
588 struct atmlec_msg *mesg;
589
Joe Perchesc48192a2010-01-26 11:40:08 +0000590 if (!priv || !priv->lecd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
593 if (!skb)
594 return -1;
595 skb->len = sizeof(struct atmlec_msg);
596 mesg = (struct atmlec_msg *)skb->data;
Chas Williamsd44f7742006-09-29 17:11:14 -0700597 memset(mesg, 0, sizeof(struct atmlec_msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 mesg->type = type;
Chas Williamsd44f7742006-09-29 17:11:14 -0700599 if (data != NULL)
600 mesg->sizeoftlvs = data->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 if (mac_addr)
602 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
Chas Williamsd44f7742006-09-29 17:11:14 -0700603 else
604 mesg->content.normal.targetless_le_arp = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 if (atm_addr)
606 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
607
Chas Williamsd44f7742006-09-29 17:11:14 -0700608 atm_force_charge(priv->lecd, skb->truesize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 sk = sk_atm(priv->lecd);
610 skb_queue_tail(&sk->sk_receive_queue, skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700611 sk->sk_data_ready(sk, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Chas Williamsd44f7742006-09-29 17:11:14 -0700613 if (data != NULL) {
Joe Perches99824462010-01-26 11:40:00 +0000614 pr_debug("about to send %d bytes of data\n", data->len);
Chas Williamsd44f7742006-09-29 17:11:14 -0700615 atm_force_charge(priv->lecd, data->truesize);
616 skb_queue_tail(&sk->sk_receive_queue, data);
617 sk->sk_data_ready(sk, skb->len);
618 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Chas Williamsd44f7742006-09-29 17:11:14 -0700620 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
622
623/* shamelessly stolen from drivers/net/net_init.c */
624static int lec_change_mtu(struct net_device *dev, int new_mtu)
625{
Chas Williamsd44f7742006-09-29 17:11:14 -0700626 if ((new_mtu < 68) || (new_mtu > 18190))
627 return -EINVAL;
628 dev->mtu = new_mtu;
629 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630}
631
632static void lec_set_multicast_list(struct net_device *dev)
633{
Chas Williamsd44f7742006-09-29 17:11:14 -0700634 /*
635 * by default, all multicast frames arrive over the bus.
636 * eventually support selective multicast service
637 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638}
639
Stephen Hemminger004b3222009-01-09 13:01:02 +0000640static const struct net_device_ops lec_netdev_ops = {
641 .ndo_open = lec_open,
642 .ndo_stop = lec_close,
643 .ndo_start_xmit = lec_start_xmit,
644 .ndo_change_mtu = lec_change_mtu,
645 .ndo_tx_timeout = lec_tx_timeout,
646 .ndo_set_multicast_list = lec_set_multicast_list,
647};
648
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -0700649static const unsigned char lec_ctrl_magic[] = {
Chas Williamsd44f7742006-09-29 17:11:14 -0700650 0xff,
651 0x00,
652 0x01,
653 0x01
654};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
Scott Talbert4a7097f2005-09-29 17:30:54 -0700656#define LEC_DATA_DIRECT_8023 2
657#define LEC_DATA_DIRECT_8025 3
658
659static int lec_is_data_direct(struct atm_vcc *vcc)
Chas Williamsd44f7742006-09-29 17:11:14 -0700660{
Scott Talbert4a7097f2005-09-29 17:30:54 -0700661 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
662 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
Chas Williamsd44f7742006-09-29 17:11:14 -0700663}
Scott Talbert4a7097f2005-09-29 17:30:54 -0700664
Chas Williamsd44f7742006-09-29 17:11:14 -0700665static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666{
Scott Talbert4a7097f2005-09-29 17:30:54 -0700667 unsigned long flags;
Chas Williamsd44f7742006-09-29 17:11:14 -0700668 struct net_device *dev = (struct net_device *)vcc->proto_data;
Wang Chen524ad0a2008-11-12 23:39:10 -0800669 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Joe Perchesc48192a2010-01-26 11:40:08 +0000671#if DUMP_PACKETS > 0
Joe Perches99824462010-01-26 11:40:00 +0000672 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
673 dev->name, vcc->vpi, vcc->vci);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700675 if (!skb) {
Stephen Hemminger52240062007-08-28 15:22:09 -0700676 pr_debug("%s: null skb\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700677 lec_vcc_close(priv, vcc);
678 return;
679 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680#if DUMP_PACKETS >= 2
Joe Perches99824462010-01-26 11:40:00 +0000681#define MAX_SKB_DUMP 99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682#elif DUMP_PACKETS >= 1
Joe Perches99824462010-01-26 11:40:00 +0000683#define MAX_SKB_DUMP 30
684#endif
685#if DUMP_PACKETS > 0
686 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
687 dev->name, skb->len, priv->lecid);
688 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
689 skb->data, min(MAX_SKB_DUMP, skb->len), true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690#endif /* DUMP_PACKETS > 0 */
Joe Perches99824462010-01-26 11:40:00 +0000691 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
692 /* Control frame, to daemon */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 struct sock *sk = sk_atm(vcc);
694
Stephen Hemminger52240062007-08-28 15:22:09 -0700695 pr_debug("%s: To daemon\n", dev->name);
Chas Williamsd44f7742006-09-29 17:11:14 -0700696 skb_queue_tail(&sk->sk_receive_queue, skb);
697 sk->sk_data_ready(sk, skb->len);
698 } else { /* Data frame, queue to protocol handlers */
Scott Talbert4a7097f2005-09-29 17:30:54 -0700699 struct lec_arp_table *entry;
Chas Williamsd44f7742006-09-29 17:11:14 -0700700 unsigned char *src, *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Chas Williamsd44f7742006-09-29 17:11:14 -0700702 atm_return(vcc, skb->truesize);
Al Viro30d492d2006-11-14 21:11:29 -0800703 if (*(__be16 *) skb->data == htons(priv->lecid) ||
Chas Williamsd44f7742006-09-29 17:11:14 -0700704 !priv->lecd || !(dev->flags & IFF_UP)) {
705 /*
706 * Probably looping back, or if lecd is missing,
707 * lecd has gone down
708 */
Stephen Hemminger52240062007-08-28 15:22:09 -0700709 pr_debug("Ignoring frame...\n");
Chas Williamsd44f7742006-09-29 17:11:14 -0700710 dev_kfree_skb(skb);
711 return;
712 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700714 if (priv->is_trdev)
715 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
716 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700718 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
Scott Talbert4a7097f2005-09-29 17:30:54 -0700719
Chas Williamsd44f7742006-09-29 17:11:14 -0700720 /*
721 * If this is a Data Direct VCC, and the VCC does not match
Scott Talbert4a7097f2005-09-29 17:30:54 -0700722 * the LE_ARP cache entry, delete the LE_ARP cache entry.
723 */
724 spin_lock_irqsave(&priv->lec_arp_lock, flags);
725 if (lec_is_data_direct(vcc)) {
726#ifdef CONFIG_TR
727 if (priv->is_trdev)
Chas Williamsd44f7742006-09-29 17:11:14 -0700728 src =
729 ((struct lecdatahdr_8025 *)skb->data)->
730 h_source;
Scott Talbert4a7097f2005-09-29 17:30:54 -0700731 else
732#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700733 src =
734 ((struct lecdatahdr_8023 *)skb->data)->
735 h_source;
Scott Talbert4a7097f2005-09-29 17:30:54 -0700736 entry = lec_arp_find(priv, src);
737 if (entry && entry->vcc != vcc) {
738 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -0700739 lec_arp_put(entry);
Scott Talbert4a7097f2005-09-29 17:30:54 -0700740 }
741 }
742 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
Chas Williamsd44f7742006-09-29 17:11:14 -0700744 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
745 !priv->is_proxy && /* Proxy wants all the packets */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 memcmp(dst, dev->dev_addr, dev->addr_len)) {
Chas Williamsd44f7742006-09-29 17:11:14 -0700747 dev_kfree_skb(skb);
748 return;
749 }
Joe Perchesc48192a2010-01-26 11:40:08 +0000750 if (!hlist_empty(&priv->lec_arp_empty_ones))
Chas Williamsd44f7742006-09-29 17:11:14 -0700751 lec_arp_check_empties(priv, vcc, skb);
Chas Williamsd44f7742006-09-29 17:11:14 -0700752 skb_pull(skb, 2); /* skip lec_id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700754 if (priv->is_trdev)
755 skb->protocol = tr_type_trans(skb, dev);
756 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700758 skb->protocol = eth_type_trans(skb, dev);
Stephen Hemminger162619e2009-01-09 13:01:01 +0000759 dev->stats.rx_packets++;
760 dev->stats.rx_bytes += skb->len;
Chas Williamsd44f7742006-09-29 17:11:14 -0700761 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
762 netif_rx(skb);
763 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764}
765
Chas Williamsd44f7742006-09-29 17:11:14 -0700766static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767{
768 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
769 struct net_device *dev = skb->dev;
770
771 if (vpriv == NULL) {
Joe Perches99824462010-01-26 11:40:00 +0000772 pr_info("vpriv = NULL!?!?!?\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return;
774 }
775
776 vpriv->old_pop(vcc, skb);
777
778 if (vpriv->xoff && atm_may_send(vcc, 0)) {
779 vpriv->xoff = 0;
780 if (netif_running(dev) && netif_queue_stopped(dev))
781 netif_wake_queue(dev);
782 }
783}
784
Chas Williamsd44f7742006-09-29 17:11:14 -0700785static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786{
787 struct lec_vcc_priv *vpriv;
Chas Williamsd44f7742006-09-29 17:11:14 -0700788 int bytes_left;
789 struct atmlec_ioc ioc_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Chas Williamsd44f7742006-09-29 17:11:14 -0700791 /* Lecd must be up in this case */
792 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
Joe Perches99824462010-01-26 11:40:00 +0000793 if (bytes_left != 0)
794 pr_info("copy from user failed for %d bytes\n", bytes_left);
Chas Williamsd44f7742006-09-29 17:11:14 -0700795 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
796 !dev_lec[ioc_data.dev_num])
797 return -EINVAL;
Joe Perchesc48192a2010-01-26 11:40:08 +0000798 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
799 if (!vpriv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 return -ENOMEM;
801 vpriv->xoff = 0;
802 vpriv->old_pop = vcc->pop;
803 vcc->user_back = vpriv;
804 vcc->pop = lec_pop;
Wang Chen524ad0a2008-11-12 23:39:10 -0800805 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
Chas Williamsd44f7742006-09-29 17:11:14 -0700806 &ioc_data, vcc, vcc->push);
807 vcc->proto_data = dev_lec[ioc_data.dev_num];
808 vcc->push = lec_push;
809 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810}
811
Chas Williamsd44f7742006-09-29 17:11:14 -0700812static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813{
Chas Williamsd44f7742006-09-29 17:11:14 -0700814 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
815 return -EINVAL;
816 vcc->proto_data = dev_lec[arg];
Joe Perches37d66802010-11-15 11:12:33 +0000817 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818}
819
820/* Initialize device. */
Chas Williamsd44f7742006-09-29 17:11:14 -0700821static int lecd_attach(struct atm_vcc *vcc, int arg)
822{
823 int i;
824 struct lec_priv *priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Chas Williamsd44f7742006-09-29 17:11:14 -0700826 if (arg < 0)
827 i = 0;
828 else
829 i = arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700831 if (arg >= MAX_LEC_ITF)
832 return -EINVAL;
833#else /* Reserve the top NUM_TR_DEVS for TR */
834 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
835 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700837 if (!dev_lec[i]) {
838 int is_trdev, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Chas Williamsd44f7742006-09-29 17:11:14 -0700840 is_trdev = 0;
841 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
842 is_trdev = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Chas Williamsd44f7742006-09-29 17:11:14 -0700844 size = sizeof(struct lec_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845#ifdef CONFIG_TR
Chas Williamsd44f7742006-09-29 17:11:14 -0700846 if (is_trdev)
847 dev_lec[i] = alloc_trdev(size);
848 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849#endif
Chas Williamsd44f7742006-09-29 17:11:14 -0700850 dev_lec[i] = alloc_etherdev(size);
851 if (!dev_lec[i])
852 return -ENOMEM;
chas williams - CONTRACTOReb044582009-12-04 05:19:30 +0000853 dev_lec[i]->netdev_ops = &lec_netdev_ops;
Chas Williamsd44f7742006-09-29 17:11:14 -0700854 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
855 if (register_netdev(dev_lec[i])) {
856 free_netdev(dev_lec[i]);
857 return -EINVAL;
858 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Wang Chen524ad0a2008-11-12 23:39:10 -0800860 priv = netdev_priv(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700861 priv->is_trdev = is_trdev;
Chas Williamsd44f7742006-09-29 17:11:14 -0700862 } else {
Wang Chen524ad0a2008-11-12 23:39:10 -0800863 priv = netdev_priv(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700864 if (priv->lecd)
865 return -EADDRINUSE;
866 }
867 lec_arp_init(priv);
868 priv->itfnum = i; /* LANE2 addition */
869 priv->lecd = vcc;
870 vcc->dev = &lecatm_dev;
871 vcc_insert_socket(sk_atm(vcc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Chas Williamsd44f7742006-09-29 17:11:14 -0700873 vcc->proto_data = dev_lec[i];
874 set_bit(ATM_VF_META, &vcc->flags);
875 set_bit(ATM_VF_READY, &vcc->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
Chas Williamsd44f7742006-09-29 17:11:14 -0700877 /* Set default values to these variables */
878 priv->maximum_unknown_frame_count = 1;
879 priv->max_unknown_frame_time = (1 * HZ);
880 priv->vcc_timeout_period = (1200 * HZ);
881 priv->max_retry_count = 1;
882 priv->aging_time = (300 * HZ);
883 priv->forward_delay_time = (15 * HZ);
884 priv->topology_change = 0;
885 priv->arp_response_time = (1 * HZ);
886 priv->flush_timeout = (4 * HZ);
887 priv->path_switching_delay = (6 * HZ);
888
Joe Perchesc48192a2010-01-26 11:40:08 +0000889 if (dev_lec[i]->flags & IFF_UP)
Chas Williamsd44f7742006-09-29 17:11:14 -0700890 netif_start_queue(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -0700891 __module_get(THIS_MODULE);
892 return i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893}
894
895#ifdef CONFIG_PROC_FS
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700896static const char *lec_arp_get_status_string(unsigned char status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700898 static const char *const lec_arp_status_string[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 "ESI_UNKNOWN ",
900 "ESI_ARP_PENDING ",
901 "ESI_VC_PENDING ",
902 "<Undefined> ",
903 "ESI_FLUSH_PENDING ",
904 "ESI_FORWARD_DIRECT"
905 };
906
907 if (status > ESI_FORWARD_DIRECT)
908 status = 3; /* ESI_UNDEFINED */
909 return lec_arp_status_string[status];
910}
911
912static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
913{
914 int i;
915
916 for (i = 0; i < ETH_ALEN; i++)
917 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
918 seq_printf(seq, " ");
919 for (i = 0; i < ATM_ESA_LEN; i++)
920 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
921 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
922 entry->flags & 0xffff);
923 if (entry->vcc)
924 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
925 else
Chas Williamsd44f7742006-09-29 17:11:14 -0700926 seq_printf(seq, " ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 if (entry->recv_vcc) {
928 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
929 entry->recv_vcc->vci);
Chas Williamsd44f7742006-09-29 17:11:14 -0700930 }
931 seq_putc(seq, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932}
933
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934struct lec_state {
935 unsigned long flags;
936 struct lec_priv *locked;
Chas Williamsd0732f62006-09-29 17:14:27 -0700937 struct hlist_node *node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 struct net_device *dev;
939 int itf;
940 int arp_table;
941 int misc_table;
942};
943
Chas Williamsd0732f62006-09-29 17:14:27 -0700944static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 loff_t *l)
946{
Chas Williamsd0732f62006-09-29 17:14:27 -0700947 struct hlist_node *e = state->node;
948 struct lec_arp_table *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949
950 if (!e)
Chas Williamsd0732f62006-09-29 17:14:27 -0700951 e = tbl->first;
Joe Perches2e1e9842008-04-10 03:33:03 -0700952 if (e == SEQ_START_TOKEN) {
Chas Williamsd0732f62006-09-29 17:14:27 -0700953 e = tbl->first;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 --*l;
955 }
Chas Williamsd0732f62006-09-29 17:14:27 -0700956
957 hlist_for_each_entry_from(tmp, e, next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 if (--*l < 0)
959 break;
960 }
Chas Williamsd0732f62006-09-29 17:14:27 -0700961 state->node = e;
962
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 return (*l < 0) ? state : NULL;
964}
965
966static void *lec_arp_walk(struct lec_state *state, loff_t *l,
Chas Williamsd44f7742006-09-29 17:11:14 -0700967 struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968{
969 void *v = NULL;
970 int p;
971
972 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
Chas Williamsd0732f62006-09-29 17:14:27 -0700973 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 if (v)
975 break;
976 }
977 state->arp_table = p;
978 return v;
979}
980
981static void *lec_misc_walk(struct lec_state *state, loff_t *l,
982 struct lec_priv *priv)
983{
Chas Williamsd0732f62006-09-29 17:14:27 -0700984 struct hlist_head *lec_misc_tables[] = {
985 &priv->lec_arp_empty_ones,
986 &priv->lec_no_forward,
987 &priv->mcast_fwds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 };
989 void *v = NULL;
990 int q;
991
992 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
993 v = lec_tbl_walk(state, lec_misc_tables[q], l);
994 if (v)
995 break;
996 }
997 state->misc_table = q;
998 return v;
999}
1000
1001static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1002 struct lec_priv *priv)
1003{
1004 if (!state->locked) {
1005 state->locked = priv;
1006 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1007 }
Chas Williamsd44f7742006-09-29 17:11:14 -07001008 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1010 state->locked = NULL;
1011 /* Partial state reset for the next time we get called */
1012 state->arp_table = state->misc_table = 0;
1013 }
1014 return state->locked;
1015}
1016
1017static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1018{
1019 struct net_device *dev;
1020 void *v;
1021
1022 dev = state->dev ? state->dev : dev_lec[state->itf];
Wang Chen524ad0a2008-11-12 23:39:10 -08001023 v = (dev && netdev_priv(dev)) ?
1024 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 if (!v && dev) {
1026 dev_put(dev);
1027 /* Partial state reset for the next time we get called */
1028 dev = NULL;
1029 }
1030 state->dev = dev;
1031 return v;
1032}
1033
1034static void *lec_get_idx(struct lec_state *state, loff_t l)
1035{
1036 void *v = NULL;
1037
1038 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1039 v = lec_itf_walk(state, &l);
1040 if (v)
1041 break;
1042 }
Chas Williamsd44f7742006-09-29 17:11:14 -07001043 return v;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1047{
1048 struct lec_state *state = seq->private;
1049
1050 state->itf = 0;
1051 state->dev = NULL;
1052 state->locked = NULL;
1053 state->arp_table = 0;
1054 state->misc_table = 0;
Joe Perches2e1e9842008-04-10 03:33:03 -07001055 state->node = SEQ_START_TOKEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
Joe Perches2e1e9842008-04-10 03:33:03 -07001057 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058}
1059
1060static void lec_seq_stop(struct seq_file *seq, void *v)
1061{
1062 struct lec_state *state = seq->private;
1063
1064 if (state->dev) {
1065 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1066 state->flags);
1067 dev_put(state->dev);
1068 }
1069}
1070
1071static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1072{
1073 struct lec_state *state = seq->private;
1074
1075 v = lec_get_idx(state, 1);
1076 *pos += !!PTR_ERR(v);
1077 return v;
1078}
1079
1080static int lec_seq_show(struct seq_file *seq, void *v)
1081{
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -07001082 static const char lec_banner[] =
1083 "Itf MAC ATM destination"
Chas Williamsd44f7742006-09-29 17:11:14 -07001084 " Status Flags "
1085 "VPI/VCI Recv VPI/VCI\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Joe Perches2e1e9842008-04-10 03:33:03 -07001087 if (v == SEQ_START_TOKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 seq_puts(seq, lec_banner);
1089 else {
1090 struct lec_state *state = seq->private;
Chas Williamsd44f7742006-09-29 17:11:14 -07001091 struct net_device *dev = state->dev;
Joe Perchesc48192a2010-01-26 11:40:08 +00001092 struct lec_arp_table *entry = hlist_entry(state->node,
1093 struct lec_arp_table,
1094 next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
1096 seq_printf(seq, "%s ", dev->name);
Chas Williamsd0732f62006-09-29 17:14:27 -07001097 lec_info(seq, entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 }
1099 return 0;
1100}
1101
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001102static const struct seq_operations lec_seq_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -07001103 .start = lec_seq_start,
1104 .next = lec_seq_next,
1105 .stop = lec_seq_stop,
1106 .show = lec_seq_show,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107};
1108
1109static int lec_seq_open(struct inode *inode, struct file *file)
1110{
Pavel Emelyanov9a8c09e2008-02-29 11:37:02 -08001111 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112}
1113
Arjan van de Ven9a321442007-02-12 00:55:35 -08001114static const struct file_operations lec_seq_fops = {
Chas Williamsd44f7742006-09-29 17:11:14 -07001115 .owner = THIS_MODULE,
1116 .open = lec_seq_open,
1117 .read = seq_read,
1118 .llseek = seq_lseek,
Pavel Emelyanov9a8c09e2008-02-29 11:37:02 -08001119 .release = seq_release_private,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120};
1121#endif
1122
1123static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1124{
1125 struct atm_vcc *vcc = ATM_SD(sock);
1126 int err = 0;
Chas Williamsd44f7742006-09-29 17:11:14 -07001127
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 switch (cmd) {
Chas Williamsd44f7742006-09-29 17:11:14 -07001129 case ATMLEC_CTRL:
1130 case ATMLEC_MCAST:
1131 case ATMLEC_DATA:
1132 if (!capable(CAP_NET_ADMIN))
1133 return -EPERM;
1134 break;
1135 default:
1136 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 }
1138
1139 switch (cmd) {
Chas Williamsd44f7742006-09-29 17:11:14 -07001140 case ATMLEC_CTRL:
1141 err = lecd_attach(vcc, (int)arg);
1142 if (err >= 0)
1143 sock->state = SS_CONNECTED;
1144 break;
1145 case ATMLEC_MCAST:
1146 err = lec_mcast_attach(vcc, (int)arg);
1147 break;
1148 case ATMLEC_DATA:
1149 err = lec_vcc_attach(vcc, (void __user *)arg);
1150 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 }
1152
1153 return err;
1154}
1155
1156static struct atm_ioctl lane_ioctl_ops = {
Chas Williamsd44f7742006-09-29 17:11:14 -07001157 .owner = THIS_MODULE,
1158 .ioctl = lane_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159};
1160
1161static int __init lane_module_init(void)
1162{
1163#ifdef CONFIG_PROC_FS
1164 struct proc_dir_entry *p;
1165
Wang Chen16e297b2008-02-28 13:55:45 -08001166 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
Wang Chendbee0d32008-03-23 21:45:36 -07001167 if (!p) {
Joe Perches99824462010-01-26 11:40:00 +00001168 pr_err("Unable to initialize /proc/net/atm/lec\n");
Wang Chendbee0d32008-03-23 21:45:36 -07001169 return -ENOMEM;
1170 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171#endif
1172
1173 register_atm_ioctl(&lane_ioctl_ops);
Michal Marek36a9f772011-04-01 12:41:20 +02001174 pr_info("lec.c: initialized\n");
Chas Williamsd44f7742006-09-29 17:11:14 -07001175 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176}
1177
1178static void __exit lane_module_cleanup(void)
1179{
Chas Williamsd44f7742006-09-29 17:11:14 -07001180 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
1182 remove_proc_entry("lec", atm_proc_root);
1183
1184 deregister_atm_ioctl(&lane_ioctl_ops);
1185
Chas Williamsd44f7742006-09-29 17:11:14 -07001186 for (i = 0; i < MAX_LEC_ITF; i++) {
1187 if (dev_lec[i] != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 unregister_netdev(dev_lec[i]);
Chas Williamsd44f7742006-09-29 17:11:14 -07001189 free_netdev(dev_lec[i]);
1190 dev_lec[i] = NULL;
1191 }
1192 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193}
1194
1195module_init(lane_module_init);
1196module_exit(lane_module_cleanup);
1197
1198/*
1199 * LANE2: 3.1.3, LE_RESOLVE.request
1200 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1201 * If sizeoftlvs == NULL the default TLVs associated with with this
1202 * lec will be used.
1203 * If dst_mac == NULL, targetless LE_ARP will be sent
1204 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001205static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
Chas Williamsd44f7742006-09-29 17:11:14 -07001206 u8 **tlvs, u32 *sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207{
1208 unsigned long flags;
Wang Chen524ad0a2008-11-12 23:39:10 -08001209 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -07001210 struct lec_arp_table *table;
1211 struct sk_buff *skb;
1212 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Chas Williamsd44f7742006-09-29 17:11:14 -07001214 if (force == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -07001216 table = lec_arp_find(priv, dst_mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williamsd44f7742006-09-29 17:11:14 -07001218 if (table == NULL)
1219 return -1;
1220
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001221 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
Chas Williamsd44f7742006-09-29 17:11:14 -07001222 if (*tlvs == NULL)
1223 return -1;
1224
Chas Williamsd44f7742006-09-29 17:11:14 -07001225 *sizeoftlvs = table->sizeoftlvs;
1226
1227 return 0;
1228 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
1230 if (sizeoftlvs == NULL)
1231 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 else {
1234 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1235 if (skb == NULL)
1236 return -1;
1237 skb->len = *sizeoftlvs;
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001238 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1240 }
Chas Williamsd44f7742006-09-29 17:11:14 -07001241 return retval;
1242}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
1244/*
1245 * LANE2: 3.1.4, LE_ASSOCIATE.request
1246 * Associate the *tlvs with the *lan_dst address.
1247 * Will overwrite any previous association
1248 * Returns 1 for success, 0 for failure (out of memory)
1249 *
1250 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001251static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1252 const u8 *tlvs, u32 sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253{
Chas Williamsd44f7742006-09-29 17:11:14 -07001254 int retval;
1255 struct sk_buff *skb;
Wang Chen524ad0a2008-11-12 23:39:10 -08001256 struct lec_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Chas Williamsd44f7742006-09-29 17:11:14 -07001258 if (compare_ether_addr(lan_dst, dev->dev_addr))
Joe Perchesc48192a2010-01-26 11:40:08 +00001259 return 0; /* not our mac address */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
Chas Williamsd44f7742006-09-29 17:11:14 -07001261 kfree(priv->tlvs); /* NULL if there was no previous association */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001263 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001264 if (priv->tlvs == NULL)
Joe Perchesc48192a2010-01-26 11:40:08 +00001265 return 0;
Chas Williamsd44f7742006-09-29 17:11:14 -07001266 priv->sizeoftlvs = sizeoftlvs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Chas Williamsd44f7742006-09-29 17:11:14 -07001268 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1269 if (skb == NULL)
1270 return 0;
1271 skb->len = sizeoftlvs;
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001272 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -07001273 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1274 if (retval != 0)
Joe Perchesc48192a2010-01-26 11:40:08 +00001275 pr_info("lec.c: lane2_associate_req() failed\n");
Chas Williamsd44f7742006-09-29 17:11:14 -07001276 /*
1277 * If the previous association has changed we must
1278 * somehow notify other LANE entities about the change
1279 */
Joe Perchesc48192a2010-01-26 11:40:08 +00001280 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281}
1282
1283/*
1284 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1285 *
1286 */
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001287static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1288 const u8 *tlvs, u32 sizeoftlvs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
1290#if 0
Chas Williamsd44f7742006-09-29 17:11:14 -07001291 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292#endif
Wang Chen524ad0a2008-11-12 23:39:10 -08001293 struct lec_priv *priv = netdev_priv(dev);
Chas Williamsd44f7742006-09-29 17:11:14 -07001294#if 0 /*
1295 * Why have the TLVs in LE_ARP entries
1296 * since we do not use them? When you
1297 * uncomment this code, make sure the
1298 * TLVs get freed when entry is killed
1299 */
1300 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
Chas Williamsd44f7742006-09-29 17:11:14 -07001302 if (entry == NULL)
1303 return; /* should not happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Chas Williamsd44f7742006-09-29 17:11:14 -07001305 kfree(entry->tlvs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -02001307 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
Chas Williamsd44f7742006-09-29 17:11:14 -07001308 if (entry->tlvs == NULL)
1309 return;
Chas Williamsd44f7742006-09-29 17:11:14 -07001310 entry->sizeoftlvs = sizeoftlvs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311#endif
1312#if 0
Joe Perchesc48192a2010-01-26 11:40:08 +00001313 pr_info("\n");
1314 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
Chas Williamsd44f7742006-09-29 17:11:14 -07001315 while (i < sizeoftlvs)
Joe Perchesc48192a2010-01-26 11:40:08 +00001316 pr_cont("%02x ", tlvs[i++]);
Chas Williamsd44f7742006-09-29 17:11:14 -07001317
Joe Perchesc48192a2010-01-26 11:40:08 +00001318 pr_cont("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319#endif
1320
Chas Williamsd44f7742006-09-29 17:11:14 -07001321 /* tell MPOA about the TLVs we saw */
1322 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1323 priv->lane2_ops->associate_indicator(dev, mac_addr,
1324 tlvs, sizeoftlvs);
1325 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326}
1327
1328/*
1329 * Here starts what used to lec_arpc.c
1330 *
1331 * lec_arpc.c was added here when making
1332 * lane client modular. October 1997
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 */
1334
1335#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336#include <linux/timer.h>
Joe Perchesc48192a2010-01-26 11:40:08 +00001337#include <linux/param.h>
Arun Sharma600634972011-07-26 16:09:06 -07001338#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339#include <linux/inetdevice.h>
1340#include <net/route.h>
1341
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342#if 0
Joe Perchesc48192a2010-01-26 11:40:08 +00001343#define pr_debug(format, args...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344/*
Joe Perches99824462010-01-26 11:40:00 +00001345 #define pr_debug printk
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346*/
1347#endif
1348#define DEBUG_ARP_TABLE 0
1349
1350#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1351
David Howellsc4028952006-11-22 14:57:56 +00001352static void lec_arp_check_expire(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353static void lec_arp_expire_arp(unsigned long data);
1354
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001355/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 * Arp table funcs
1357 */
1358
Joe Perchesc48192a2010-01-26 11:40:08 +00001359#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
1361/*
1362 * Initialization of arp-cache
1363 */
Chas Williams1fa99612006-09-29 17:11:47 -07001364static void lec_arp_init(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365{
Chas Williams1fa99612006-09-29 17:11:47 -07001366 unsigned short i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
Joe Perchesc48192a2010-01-26 11:40:08 +00001368 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
Chas Williamsd0732f62006-09-29 17:14:27 -07001369 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001370 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1371 INIT_HLIST_HEAD(&priv->lec_no_forward);
1372 INIT_HLIST_HEAD(&priv->mcast_fwds);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 spin_lock_init(&priv->lec_arp_lock);
David Howellsc4028952006-11-22 14:57:56 +00001374 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
Chas Williams987e46b2006-09-29 17:15:59 -07001375 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376}
1377
Chas Williams1fa99612006-09-29 17:11:47 -07001378static void lec_arp_clear_vccs(struct lec_arp_table *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379{
Chas Williams1fa99612006-09-29 17:11:47 -07001380 if (entry->vcc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 struct atm_vcc *vcc = entry->vcc;
1382 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
Chas Williams1fa99612006-09-29 17:11:47 -07001383 struct net_device *dev = (struct net_device *)vcc->proto_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
Chas Williams1fa99612006-09-29 17:11:47 -07001385 vcc->pop = vpriv->old_pop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 if (vpriv->xoff)
1387 netif_wake_queue(dev);
1388 kfree(vpriv);
1389 vcc->user_back = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07001390 vcc->push = entry->old_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 vcc_release_async(vcc, -EPIPE);
Chas Williamsd0732f62006-09-29 17:14:27 -07001392 entry->vcc = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07001393 }
1394 if (entry->recv_vcc) {
1395 entry->recv_vcc->push = entry->old_recv_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 vcc_release_async(entry->recv_vcc, -EPIPE);
Chas Williams1fa99612006-09-29 17:11:47 -07001397 entry->recv_vcc = NULL;
1398 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399}
1400
1401/*
1402 * Insert entry to lec_arp_table
1403 * LANE2: Add to the end of the list to satisfy 8.1.13
1404 */
Chas Williams1fa99612006-09-29 17:11:47 -07001405static inline void
Chas Williamsd0732f62006-09-29 17:14:27 -07001406lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407{
Chas Williamsd0732f62006-09-29 17:14:27 -07001408 struct hlist_head *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
Chas Williamsd0732f62006-09-29 17:14:27 -07001410 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1411 hlist_add_head(&entry->next, tmp);
Chas Williams1fa99612006-09-29 17:11:47 -07001412
Joe Perches99824462010-01-26 11:40:00 +00001413 pr_debug("Added entry:%pM\n", entry->mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414}
1415
1416/*
1417 * Remove entry from lec_arp_table
1418 */
Chas Williams1fa99612006-09-29 17:11:47 -07001419static int
1420lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421{
Chas Williamsd0732f62006-09-29 17:14:27 -07001422 struct hlist_node *node;
1423 struct lec_arp_table *entry;
1424 int i, remove_vcc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Joe Perchesc48192a2010-01-26 11:40:08 +00001426 if (!to_remove)
Chas Williams1fa99612006-09-29 17:11:47 -07001427 return -1;
Chas Williamsd0732f62006-09-29 17:14:27 -07001428
1429 hlist_del(&to_remove->next);
Chas Williams1fa99612006-09-29 17:11:47 -07001430 del_timer(&to_remove->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Joe Perchesc48192a2010-01-26 11:40:08 +00001432 /*
1433 * If this is the only MAC connected to this VCC,
1434 * also tear down the VCC
1435 */
Chas Williams1fa99612006-09-29 17:11:47 -07001436 if (to_remove->status >= ESI_FLUSH_PENDING) {
1437 /*
1438 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1439 */
Chas Williamsd0732f62006-09-29 17:14:27 -07001440 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001441 hlist_for_each_entry(entry, node,
1442 &priv->lec_arp_tables[i], next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001443 if (memcmp(to_remove->atm_addr,
1444 entry->atm_addr, ATM_ESA_LEN) == 0) {
Chas Williams1fa99612006-09-29 17:11:47 -07001445 remove_vcc = 0;
1446 break;
1447 }
1448 }
1449 }
1450 if (remove_vcc)
1451 lec_arp_clear_vccs(to_remove);
1452 }
1453 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1454
Joe Perches99824462010-01-26 11:40:00 +00001455 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07001456 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457}
1458
1459#if DEBUG_ARP_TABLE
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -07001460static const char *get_status_string(unsigned char st)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461{
Chas Williams1fa99612006-09-29 17:11:47 -07001462 switch (st) {
1463 case ESI_UNKNOWN:
1464 return "ESI_UNKNOWN";
1465 case ESI_ARP_PENDING:
1466 return "ESI_ARP_PENDING";
1467 case ESI_VC_PENDING:
1468 return "ESI_VC_PENDING";
1469 case ESI_FLUSH_PENDING:
1470 return "ESI_FLUSH_PENDING";
1471 case ESI_FORWARD_DIRECT:
1472 return "ESI_FORWARD_DIRECT";
Chas Williams1fa99612006-09-29 17:11:47 -07001473 }
Joe Perchesc48192a2010-01-26 11:40:08 +00001474 return "<UNKNOWN>";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Chas Williams1fa99612006-09-29 17:11:47 -07001477static void dump_arp_table(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478{
Chas Williamsd0732f62006-09-29 17:14:27 -07001479 struct hlist_node *node;
Chas Williams1fa99612006-09-29 17:11:47 -07001480 struct lec_arp_table *rulla;
Chas Williamsd0732f62006-09-29 17:14:27 -07001481 char buf[256];
1482 int i, j, offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
Joe Perchesc48192a2010-01-26 11:40:08 +00001484 pr_info("Dump %p:\n", priv);
Chas Williams1fa99612006-09-29 17:11:47 -07001485 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001486 hlist_for_each_entry(rulla, node,
1487 &priv->lec_arp_tables[i], next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001488 offset = 0;
1489 offset += sprintf(buf, "%d: %p\n", i, rulla);
Joe Perchesc48192a2010-01-26 11:40:08 +00001490 offset += sprintf(buf + offset, "Mac: %pM",
1491 rulla->mac_addr);
1492 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001493 for (j = 0; j < ATM_ESA_LEN; j++) {
1494 offset += sprintf(buf + offset,
1495 "%2.2x ",
1496 rulla->atm_addr[j] & 0xff);
1497 }
1498 offset += sprintf(buf + offset,
1499 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1500 rulla->vcc ? rulla->vcc->vpi : 0,
1501 rulla->vcc ? rulla->vcc->vci : 0,
1502 rulla->recv_vcc ? rulla->recv_vcc->
1503 vpi : 0,
1504 rulla->recv_vcc ? rulla->recv_vcc->
1505 vci : 0, rulla->last_used,
1506 rulla->timestamp, rulla->no_tries);
1507 offset +=
1508 sprintf(buf + offset,
1509 "Flags:%x, Packets_flooded:%x, Status: %s ",
1510 rulla->flags, rulla->packets_flooded,
1511 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001512 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001513 }
Chas Williams1fa99612006-09-29 17:11:47 -07001514 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001515
1516 if (!hlist_empty(&priv->lec_no_forward))
Joe Perchesc48192a2010-01-26 11:40:08 +00001517 pr_info("No forward\n");
Chas Williamsd0732f62006-09-29 17:14:27 -07001518 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001519 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001520 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1521 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001522 for (j = 0; j < ATM_ESA_LEN; j++) {
1523 offset += sprintf(buf + offset, "%2.2x ",
1524 rulla->atm_addr[j] & 0xff);
1525 }
1526 offset += sprintf(buf + offset,
1527 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1528 rulla->vcc ? rulla->vcc->vpi : 0,
1529 rulla->vcc ? rulla->vcc->vci : 0,
1530 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1531 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1532 rulla->last_used,
1533 rulla->timestamp, rulla->no_tries);
1534 offset += sprintf(buf + offset,
1535 "Flags:%x, Packets_flooded:%x, Status: %s ",
1536 rulla->flags, rulla->packets_flooded,
1537 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001538 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001539 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001540
1541 if (!hlist_empty(&priv->lec_arp_empty_ones))
Joe Perchesc48192a2010-01-26 11:40:08 +00001542 pr_info("Empty ones\n");
Chas Williamsd0732f62006-09-29 17:14:27 -07001543 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001544 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001545 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1546 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001547 for (j = 0; j < ATM_ESA_LEN; j++) {
1548 offset += sprintf(buf + offset, "%2.2x ",
1549 rulla->atm_addr[j] & 0xff);
1550 }
1551 offset += sprintf(buf + offset,
1552 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1553 rulla->vcc ? rulla->vcc->vpi : 0,
1554 rulla->vcc ? rulla->vcc->vci : 0,
1555 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1556 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1557 rulla->last_used,
1558 rulla->timestamp, rulla->no_tries);
1559 offset += sprintf(buf + offset,
1560 "Flags:%x, Packets_flooded:%x, Status: %s ",
1561 rulla->flags, rulla->packets_flooded,
1562 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001563 pr_info("%s", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001564 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Chas Williamsd0732f62006-09-29 17:14:27 -07001566 if (!hlist_empty(&priv->mcast_fwds))
Joe Perchesc48192a2010-01-26 11:40:08 +00001567 pr_info("Multicast Forward VCCs\n");
Chas Williamsd0732f62006-09-29 17:14:27 -07001568 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001569 offset = 0;
Joe Perchesc48192a2010-01-26 11:40:08 +00001570 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1571 offset += sprintf(buf + offset, " Atm:");
Chas Williams1fa99612006-09-29 17:11:47 -07001572 for (j = 0; j < ATM_ESA_LEN; j++) {
1573 offset += sprintf(buf + offset, "%2.2x ",
1574 rulla->atm_addr[j] & 0xff);
1575 }
1576 offset += sprintf(buf + offset,
1577 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1578 rulla->vcc ? rulla->vcc->vpi : 0,
1579 rulla->vcc ? rulla->vcc->vci : 0,
1580 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1581 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1582 rulla->last_used,
1583 rulla->timestamp, rulla->no_tries);
1584 offset += sprintf(buf + offset,
1585 "Flags:%x, Packets_flooded:%x, Status: %s ",
1586 rulla->flags, rulla->packets_flooded,
1587 get_status_string(rulla->status));
Joe Perchesc48192a2010-01-26 11:40:08 +00001588 pr_info("%s\n", buf);
Chas Williams1fa99612006-09-29 17:11:47 -07001589 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591}
Chas Williamsd0732f62006-09-29 17:14:27 -07001592#else
1593#define dump_arp_table(priv) do { } while (0)
1594#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
1596/*
1597 * Destruction of arp-cache
1598 */
Chas Williams1fa99612006-09-29 17:11:47 -07001599static void lec_arp_destroy(struct lec_priv *priv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
1601 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07001602 struct hlist_node *node, *next;
1603 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001604 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605
Tejun Heoafe2c512010-12-14 16:21:17 +01001606 cancel_delayed_work_sync(&priv->lec_arp_work);
Chas Williams1fa99612006-09-29 17:11:47 -07001607
1608 /*
1609 * Remove all entries
1610 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
1612 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001613 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001614 hlist_for_each_entry_safe(entry, node, next,
1615 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001616 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001617 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001618 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001619 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
Chas Williams1fa99612006-09-29 17:11:47 -07001620 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001621
Joe Perchesc48192a2010-01-26 11:40:08 +00001622 hlist_for_each_entry_safe(entry, node, next,
1623 &priv->lec_arp_empty_ones, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001624 del_timer_sync(&entry->timer);
1625 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001626 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001627 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001628 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001629 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1630
Joe Perchesc48192a2010-01-26 11:40:08 +00001631 hlist_for_each_entry_safe(entry, node, next,
1632 &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001633 del_timer_sync(&entry->timer);
1634 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001635 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001636 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001637 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001638 INIT_HLIST_HEAD(&priv->lec_no_forward);
1639
1640 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07001641 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1642 lec_arp_clear_vccs(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07001643 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001644 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001645 }
Chas Williamsd0732f62006-09-29 17:14:27 -07001646 INIT_HLIST_HEAD(&priv->mcast_fwds);
Chas Williams1fa99612006-09-29 17:11:47 -07001647 priv->mcast_vcc = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1649}
1650
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001651/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 * Find entry by mac_address
1653 */
Chas Williams1fa99612006-09-29 17:11:47 -07001654static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001655 const unsigned char *mac_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656{
Chas Williamsd0732f62006-09-29 17:14:27 -07001657 struct hlist_node *node;
1658 struct hlist_head *head;
1659 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Joe Perches99824462010-01-26 11:40:00 +00001661 pr_debug("%pM\n", mac_addr);
Chas Williams1fa99612006-09-29 17:11:47 -07001662
Chas Williamsd0732f62006-09-29 17:14:27 -07001663 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1664 hlist_for_each_entry(entry, node, head, next) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001665 if (!compare_ether_addr(mac_addr, entry->mac_addr))
Chas Williamsd0732f62006-09-29 17:14:27 -07001666 return entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001667 }
1668 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669}
1670
Chas Williams1fa99612006-09-29 17:11:47 -07001671static struct lec_arp_table *make_entry(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001672 const unsigned char *mac_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673{
Chas Williams1fa99612006-09-29 17:11:47 -07001674 struct lec_arp_table *to_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Chas Williams1fa99612006-09-29 17:11:47 -07001676 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1677 if (!to_return) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001678 pr_info("LEC: Arp entry kmalloc failed\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001679 return NULL;
1680 }
1681 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
Chas Williamsd0732f62006-09-29 17:14:27 -07001682 INIT_HLIST_NODE(&to_return->next);
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08001683 setup_timer(&to_return->timer, lec_arp_expire_arp,
1684 (unsigned long)to_return);
Chas Williams1fa99612006-09-29 17:11:47 -07001685 to_return->last_used = jiffies;
1686 to_return->priv = priv;
1687 skb_queue_head_init(&to_return->tx_wait);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001688 atomic_set(&to_return->usage, 1);
Chas Williams1fa99612006-09-29 17:11:47 -07001689 return to_return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690}
1691
Chas Williams1fa99612006-09-29 17:11:47 -07001692/* Arp sent timer expired */
1693static void lec_arp_expire_arp(unsigned long data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694{
Chas Williams1fa99612006-09-29 17:11:47 -07001695 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
Chas Williams1fa99612006-09-29 17:11:47 -07001697 entry = (struct lec_arp_table *)data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Joe Perches99824462010-01-26 11:40:00 +00001699 pr_debug("\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001700 if (entry->status == ESI_ARP_PENDING) {
1701 if (entry->no_tries <= entry->priv->max_retry_count) {
1702 if (entry->is_rdesc)
1703 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1704 entry->mac_addr, NULL, NULL);
1705 else
1706 send_to_lecd(entry->priv, l_arp_xmt,
1707 entry->mac_addr, NULL, NULL);
1708 entry->no_tries++;
1709 }
1710 mod_timer(&entry->timer, jiffies + (1 * HZ));
1711 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712}
1713
Chas Williams1fa99612006-09-29 17:11:47 -07001714/* Unknown/unused vcc expire, remove associated entry */
1715static void lec_arp_expire_vcc(unsigned long data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716{
1717 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07001718 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1719 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720
Chas Williams1fa99612006-09-29 17:11:47 -07001721 del_timer(&to_remove->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722
Joe Perches99824462010-01-26 11:40:00 +00001723 pr_debug("%p %p: vpi:%d vci:%d\n",
1724 to_remove, priv,
1725 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1726 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727
1728 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd0732f62006-09-29 17:14:27 -07001729 hlist_del(&to_remove->next);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1731
Chas Williams1fa99612006-09-29 17:11:47 -07001732 lec_arp_clear_vccs(to_remove);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001733 lec_arp_put(to_remove);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734}
1735
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001736static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1737 unsigned long now,
1738 struct lec_priv *priv)
1739{
1740 unsigned long time_to_check;
1741
1742 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1743 time_to_check = priv->forward_delay_time;
1744 else
1745 time_to_check = priv->aging_time;
1746
1747 pr_debug("About to expire: %lx - %lx > %lx\n",
1748 now, entry->last_used, time_to_check);
1749 if (time_after(now, entry->last_used + time_to_check) &&
1750 !(entry->flags & LEC_PERMANENT_FLAG) &&
1751 !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1752 /* Remove entry */
1753 pr_debug("Entry timed out\n");
1754 lec_arp_remove(priv, entry);
1755 lec_arp_put(entry);
1756 } else {
1757 /* Something else */
1758 if ((entry->status == ESI_VC_PENDING ||
1759 entry->status == ESI_ARP_PENDING) &&
1760 time_after_eq(now, entry->timestamp +
1761 priv->max_unknown_frame_time)) {
1762 entry->timestamp = jiffies;
1763 entry->packets_flooded = 0;
1764 if (entry->status == ESI_VC_PENDING)
1765 send_to_lecd(priv, l_svc_setup,
1766 entry->mac_addr,
1767 entry->atm_addr,
1768 NULL);
1769 }
1770 if (entry->status == ESI_FLUSH_PENDING &&
1771 time_after_eq(now, entry->timestamp +
1772 priv->path_switching_delay)) {
1773 lec_arp_hold(entry);
1774 return true;
1775 }
1776 }
1777
1778 return false;
1779}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780/*
1781 * Expire entries.
1782 * 1. Re-set timer
1783 * 2. For each entry, delete entries that have aged past the age limit.
1784 * 3. For each entry, depending on the status of the entry, perform
1785 * the following maintenance.
1786 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1787 * tick_count is above the max_unknown_frame_time, clear
1788 * the tick_count to zero and clear the packets_flooded counter
1789 * to zero. This supports the packet rate limit per address
1790 * while flooding unknowns.
1791 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1792 * than or equal to the path_switching_delay, change the status
1793 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1794 * regardless of the progress of the flush protocol.
1795 */
David Howellsc4028952006-11-22 14:57:56 +00001796static void lec_arp_check_expire(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797{
1798 unsigned long flags;
David Howellsc4028952006-11-22 14:57:56 +00001799 struct lec_priv *priv =
1800 container_of(work, struct lec_priv, lec_arp_work.work);
Chas Williamsd0732f62006-09-29 17:14:27 -07001801 struct hlist_node *node, *next;
1802 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001803 unsigned long now;
Chas Williams1fa99612006-09-29 17:11:47 -07001804 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805
Joe Perches99824462010-01-26 11:40:00 +00001806 pr_debug("%p\n", priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 now = jiffies;
Chas Williams6656e3c2006-09-29 17:17:17 -07001808restart:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001810 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001811 hlist_for_each_entry_safe(entry, node, next,
1812 &priv->lec_arp_tables[i], next) {
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001813 if (__lec_arp_check_expire(entry, now, priv)) {
1814 struct sk_buff *skb;
1815 struct atm_vcc *vcc = entry->vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001817 spin_unlock_irqrestore(&priv->lec_arp_lock,
1818 flags);
1819 while ((skb = skb_dequeue(&entry->tx_wait)))
1820 lec_send(vcc, skb);
1821 entry->last_used = jiffies;
1822 entry->status = ESI_FORWARD_DIRECT;
Chas Williams33a9c2d2006-09-29 17:16:48 -07001823 lec_arp_put(entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824
Joe Perchesb4c84ec2010-01-26 11:40:19 +00001825 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 }
1827 }
1828 }
1829 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1830
Chas Williams987e46b2006-09-29 17:15:59 -07001831 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832}
Chas Williams1fa99612006-09-29 17:11:47 -07001833
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834/*
1835 * Try to find vcc where mac_address is attached.
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001836 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 */
Chas Williams1fa99612006-09-29 17:11:47 -07001838static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
Joe Perchesc48192a2010-01-26 11:40:08 +00001839 const unsigned char *mac_to_find,
1840 int is_rdesc,
Chas Williams1fa99612006-09-29 17:11:47 -07001841 struct lec_arp_table **ret_entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842{
1843 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07001844 struct lec_arp_table *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 struct atm_vcc *found;
1846
Chas Williams1fa99612006-09-29 17:11:47 -07001847 if (mac_to_find[0] & 0x01) {
1848 switch (priv->lane_version) {
1849 case 1:
1850 return priv->mcast_vcc;
Chas Williams1fa99612006-09-29 17:11:47 -07001851 case 2: /* LANE2 wants arp for multicast addresses */
1852 if (!compare_ether_addr(mac_to_find, bus_mac))
1853 return priv->mcast_vcc;
1854 break;
1855 default:
1856 break;
1857 }
1858 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859
1860 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001861 entry = lec_arp_find(priv, mac_to_find);
1862
1863 if (entry) {
1864 if (entry->status == ESI_FORWARD_DIRECT) {
1865 /* Connection Ok */
1866 entry->last_used = jiffies;
Chas Williams6656e3c2006-09-29 17:17:17 -07001867 lec_arp_hold(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001868 *ret_entry = entry;
1869 found = entry->vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001871 }
1872 /*
1873 * If the LE_ARP cache entry is still pending, reset count to 0
Scott Talbert75b895c2005-09-29 17:31:30 -07001874 * so another LE_ARP request can be made for this frame.
1875 */
Joe Perchesc48192a2010-01-26 11:40:08 +00001876 if (entry->status == ESI_ARP_PENDING)
Scott Talbert75b895c2005-09-29 17:31:30 -07001877 entry->no_tries = 0;
Chas Williams1fa99612006-09-29 17:11:47 -07001878 /*
1879 * Data direct VC not yet set up, check to see if the unknown
1880 * frame count is greater than the limit. If the limit has
1881 * not been reached, allow the caller to send packet to
1882 * BUS.
1883 */
1884 if (entry->status != ESI_FLUSH_PENDING &&
1885 entry->packets_flooded <
1886 priv->maximum_unknown_frame_count) {
1887 entry->packets_flooded++;
Joe Perches99824462010-01-26 11:40:00 +00001888 pr_debug("Flooding..\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001889 found = priv->mcast_vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001891 }
1892 /*
1893 * We got here because entry->status == ESI_FLUSH_PENDING
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 * or BUS flood limit was reached for an entry which is
1895 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1896 */
Chas Williams6656e3c2006-09-29 17:17:17 -07001897 lec_arp_hold(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001898 *ret_entry = entry;
Joe Perches99824462010-01-26 11:40:00 +00001899 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1900 entry->vcc);
Chas Williams1fa99612006-09-29 17:11:47 -07001901 found = NULL;
1902 } else {
1903 /* No matching entry was found */
1904 entry = make_entry(priv, mac_to_find);
Joe Perches99824462010-01-26 11:40:00 +00001905 pr_debug("Making entry\n");
Chas Williams1fa99612006-09-29 17:11:47 -07001906 if (!entry) {
1907 found = priv->mcast_vcc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07001909 }
1910 lec_arp_add(priv, entry);
1911 /* We want arp-request(s) to be sent */
1912 entry->packets_flooded = 1;
1913 entry->status = ESI_ARP_PENDING;
1914 entry->no_tries = 1;
1915 entry->last_used = entry->timestamp = jiffies;
1916 entry->is_rdesc = is_rdesc;
1917 if (entry->is_rdesc)
1918 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1919 NULL);
1920 else
1921 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1922 entry->timer.expires = jiffies + (1 * HZ);
1923 entry->timer.function = lec_arp_expire_arp;
1924 add_timer(&entry->timer);
1925 found = priv->mcast_vcc;
1926 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927
1928out:
1929 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1930 return found;
1931}
1932
1933static int
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001934lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
Chas Williams1fa99612006-09-29 17:11:47 -07001935 unsigned long permanent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936{
1937 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07001938 struct hlist_node *node, *next;
1939 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07001940 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941
Joe Perches99824462010-01-26 11:40:00 +00001942 pr_debug("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001944 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001945 hlist_for_each_entry_safe(entry, node, next,
1946 &priv->lec_arp_tables[i], next) {
1947 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1948 (permanent ||
1949 !(entry->flags & LEC_PERMANENT_FLAG))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001951 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07001952 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001954 return 0;
1955 }
1956 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001958 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959}
1960
1961/*
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09001962 * Notifies: Response to arp_request (atm_addr != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 */
1964static void
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07001965lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1966 const unsigned char *atm_addr, unsigned long remoteflag,
Chas Williams1fa99612006-09-29 17:11:47 -07001967 unsigned int targetless_le_arp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
1969 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07001970 struct hlist_node *node, *next;
Chas Williams1fa99612006-09-29 17:11:47 -07001971 struct lec_arp_table *entry, *tmp;
1972 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Joe Perches99824462010-01-26 11:40:00 +00001974 pr_debug("%smac:%pM\n",
1975 (targetless_le_arp) ? "targetless " : "", mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976
1977 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07001978 entry = lec_arp_find(priv, mac_addr);
1979 if (entry == NULL && targetless_le_arp)
1980 goto out; /*
1981 * LANE2: ignore targetless LE_ARPs for which
1982 * we have no entry in the cache. 7.1.30
1983 */
Chas Williamsd0732f62006-09-29 17:14:27 -07001984 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
Joe Perchesc48192a2010-01-26 11:40:08 +00001985 hlist_for_each_entry_safe(entry, node, next,
1986 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07001987 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1988 hlist_del(&entry->next);
Chas Williams1fa99612006-09-29 17:11:47 -07001989 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07001990 tmp = lec_arp_find(priv, mac_addr);
1991 if (tmp) {
1992 del_timer(&tmp->timer);
1993 tmp->status = ESI_FORWARD_DIRECT;
1994 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1995 tmp->vcc = entry->vcc;
1996 tmp->old_push = entry->old_push;
1997 tmp->last_used = jiffies;
1998 del_timer(&entry->timer);
Chas Williams33a9c2d2006-09-29 17:16:48 -07001999 lec_arp_put(entry);
Chas Williamsd0732f62006-09-29 17:14:27 -07002000 entry = tmp;
2001 } else {
2002 entry->status = ESI_FORWARD_DIRECT;
2003 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2004 entry->last_used = jiffies;
2005 lec_arp_add(priv, entry);
2006 }
2007 if (remoteflag)
2008 entry->flags |= LEC_REMOTE_FLAG;
2009 else
2010 entry->flags &= ~LEC_REMOTE_FLAG;
Stephen Hemminger52240062007-08-28 15:22:09 -07002011 pr_debug("After update\n");
Chas Williamsd0732f62006-09-29 17:14:27 -07002012 dump_arp_table(priv);
2013 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002014 }
Chas Williams1fa99612006-09-29 17:11:47 -07002015 }
2016 }
Chas Williamsd0732f62006-09-29 17:14:27 -07002017
Chas Williams1fa99612006-09-29 17:11:47 -07002018 entry = lec_arp_find(priv, mac_addr);
2019 if (!entry) {
2020 entry = make_entry(priv, mac_addr);
2021 if (!entry)
2022 goto out;
2023 entry->status = ESI_UNKNOWN;
2024 lec_arp_add(priv, entry);
2025 /* Temporary, changes before end of function */
2026 }
2027 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2028 del_timer(&entry->timer);
2029 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00002030 hlist_for_each_entry(tmp, node,
2031 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002032 if (entry != tmp &&
2033 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2034 /* Vcc to this host exists */
2035 if (tmp->status > ESI_VC_PENDING) {
2036 /*
2037 * ESI_FLUSH_PENDING,
2038 * ESI_FORWARD_DIRECT
2039 */
2040 entry->vcc = tmp->vcc;
2041 entry->old_push = tmp->old_push;
2042 }
2043 entry->status = tmp->status;
2044 break;
2045 }
2046 }
2047 }
2048 if (remoteflag)
2049 entry->flags |= LEC_REMOTE_FLAG;
2050 else
2051 entry->flags &= ~LEC_REMOTE_FLAG;
2052 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2053 entry->status = ESI_VC_PENDING;
Chas Williamsd0732f62006-09-29 17:14:27 -07002054 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
Chas Williams1fa99612006-09-29 17:11:47 -07002055 }
Stephen Hemminger52240062007-08-28 15:22:09 -07002056 pr_debug("After update2\n");
Chas Williams1fa99612006-09-29 17:11:47 -07002057 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058out:
2059 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2060}
2061
2062/*
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +09002063 * Notifies: Vcc setup ready
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 */
2065static void
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07002066lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
Chas Williams1fa99612006-09-29 17:11:47 -07002067 struct atm_vcc *vcc,
2068 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069{
2070 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07002071 struct hlist_node *node;
Chas Williams1fa99612006-09-29 17:11:47 -07002072 struct lec_arp_table *entry;
2073 int i, found_entry = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
2075 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Joe Perchesc48192a2010-01-26 11:40:08 +00002076 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
Chas Williams1fa99612006-09-29 17:11:47 -07002077 if (ioc_data->receive == 2) {
Stephen Hemminger52240062007-08-28 15:22:09 -07002078 pr_debug("LEC_ARP: Attaching mcast forward\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079#if 0
Chas Williams1fa99612006-09-29 17:11:47 -07002080 entry = lec_arp_find(priv, bus_mac);
2081 if (!entry) {
Joe Perchesc48192a2010-01-26 11:40:08 +00002082 pr_info("LEC_ARP: Multicast entry not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002084 }
2085 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2086 entry->recv_vcc = vcc;
2087 entry->old_recv_push = old_push;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088#endif
Chas Williams1fa99612006-09-29 17:11:47 -07002089 entry = make_entry(priv, bus_mac);
2090 if (entry == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002092 del_timer(&entry->timer);
2093 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2094 entry->recv_vcc = vcc;
2095 entry->old_recv_push = old_push;
Chas Williamsd0732f62006-09-29 17:14:27 -07002096 hlist_add_head(&entry->next, &priv->mcast_fwds);
Chas Williams1fa99612006-09-29 17:11:47 -07002097 goto out;
2098 } else if (ioc_data->receive == 1) {
2099 /*
2100 * Vcc which we don't want to make default vcc,
2101 * attach it anyway.
2102 */
Joe Perches99824462010-01-26 11:40:00 +00002103 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",
2104 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2105 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2106 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2107 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2108 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2109 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2110 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2111 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2112 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2113 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
Chas Williams1fa99612006-09-29 17:11:47 -07002114 entry = make_entry(priv, bus_mac);
2115 if (entry == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002117 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2118 memset(entry->mac_addr, 0, ETH_ALEN);
2119 entry->recv_vcc = vcc;
2120 entry->old_recv_push = old_push;
2121 entry->status = ESI_UNKNOWN;
2122 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2123 entry->timer.function = lec_arp_expire_vcc;
Chas Williamsd0732f62006-09-29 17:14:27 -07002124 hlist_add_head(&entry->next, &priv->lec_no_forward);
Chas Williams1fa99612006-09-29 17:11:47 -07002125 add_timer(&entry->timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 dump_arp_table(priv);
2127 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002128 }
Joe Perches99824462010-01-26 11:40:00 +00002129 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",
2130 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2131 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2132 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2133 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2134 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2135 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2136 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2137 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2138 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2139 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
Chas Williams1fa99612006-09-29 17:11:47 -07002140 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00002141 hlist_for_each_entry(entry, node,
2142 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002143 if (memcmp
2144 (ioc_data->atm_addr, entry->atm_addr,
2145 ATM_ESA_LEN) == 0) {
Stephen Hemminger52240062007-08-28 15:22:09 -07002146 pr_debug("LEC_ARP: Attaching data direct\n");
2147 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
Joe Perches99824462010-01-26 11:40:00 +00002148 entry->vcc ? entry->vcc->vci : 0,
2149 entry->recv_vcc ? entry->recv_vcc->
2150 vci : 0);
Chas Williams1fa99612006-09-29 17:11:47 -07002151 found_entry = 1;
2152 del_timer(&entry->timer);
2153 entry->vcc = vcc;
2154 entry->old_push = old_push;
2155 if (entry->status == ESI_VC_PENDING) {
2156 if (priv->maximum_unknown_frame_count
2157 == 0)
2158 entry->status =
2159 ESI_FORWARD_DIRECT;
2160 else {
2161 entry->timestamp = jiffies;
2162 entry->status =
2163 ESI_FLUSH_PENDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164#if 0
Chas Williams1fa99612006-09-29 17:11:47 -07002165 send_to_lecd(priv, l_flush_xmt,
2166 NULL,
2167 entry->atm_addr,
2168 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169#endif
Chas Williams1fa99612006-09-29 17:11:47 -07002170 }
2171 } else {
2172 /*
2173 * They were forming a connection
2174 * to us, and we to them. Our
2175 * ATM address is numerically lower
2176 * than theirs, so we make connection
2177 * we formed into default VCC (8.1.11).
2178 * Connection they made gets torn
2179 * down. This might confuse some
2180 * clients. Can be changed if
2181 * someone reports trouble...
2182 */
2183 ;
2184 }
2185 }
2186 }
2187 }
2188 if (found_entry) {
Stephen Hemminger52240062007-08-28 15:22:09 -07002189 pr_debug("After vcc was added\n");
Chas Williams1fa99612006-09-29 17:11:47 -07002190 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002192 }
2193 /*
2194 * Not found, snatch address from first data packet that arrives
2195 * from this vcc
2196 */
2197 entry = make_entry(priv, bus_mac);
2198 if (!entry)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002200 entry->vcc = vcc;
2201 entry->old_push = old_push;
2202 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2203 memset(entry->mac_addr, 0, ETH_ALEN);
2204 entry->status = ESI_UNKNOWN;
Chas Williamsd0732f62006-09-29 17:14:27 -07002205 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
Chas Williams1fa99612006-09-29 17:11:47 -07002206 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2207 entry->timer.function = lec_arp_expire_vcc;
2208 add_timer(&entry->timer);
Stephen Hemminger52240062007-08-28 15:22:09 -07002209 pr_debug("After vcc was added\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210 dump_arp_table(priv);
2211out:
2212 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2213}
2214
Chas Williams1fa99612006-09-29 17:11:47 -07002215static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216{
2217 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07002218 struct hlist_node *node;
Chas Williams1fa99612006-09-29 17:11:47 -07002219 struct lec_arp_table *entry;
2220 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
Joe Perches99824462010-01-26 11:40:00 +00002222 pr_debug("%lx\n", tran_id);
Chas Williams6656e3c2006-09-29 17:17:17 -07002223restart:
Chas Williams1fa99612006-09-29 17:11:47 -07002224 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2225 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00002226 hlist_for_each_entry(entry, node,
2227 &priv->lec_arp_tables[i], next) {
2228 if (entry->flush_tran_id == tran_id &&
2229 entry->status == ESI_FLUSH_PENDING) {
Chas Williams1fa99612006-09-29 17:11:47 -07002230 struct sk_buff *skb;
Chas Williams6656e3c2006-09-29 17:17:17 -07002231 struct atm_vcc *vcc = entry->vcc;
Chas Williams1fa99612006-09-29 17:11:47 -07002232
Chas Williams6656e3c2006-09-29 17:17:17 -07002233 lec_arp_hold(entry);
Joe Perchesc48192a2010-01-26 11:40:08 +00002234 spin_unlock_irqrestore(&priv->lec_arp_lock,
2235 flags);
Joe Perchesb4c84ec2010-01-26 11:40:19 +00002236 while ((skb = skb_dequeue(&entry->tx_wait)))
Stephen Hemminger162619e2009-01-09 13:01:01 +00002237 lec_send(vcc, skb);
Chas Williams6656e3c2006-09-29 17:17:17 -07002238 entry->last_used = jiffies;
Chas Williams1fa99612006-09-29 17:11:47 -07002239 entry->status = ESI_FORWARD_DIRECT;
Chas Williams6656e3c2006-09-29 17:17:17 -07002240 lec_arp_put(entry);
Stephen Hemminger52240062007-08-28 15:22:09 -07002241 pr_debug("LEC_ARP: Flushed\n");
Chas Williams6656e3c2006-09-29 17:17:17 -07002242 goto restart;
Chas Williams1fa99612006-09-29 17:11:47 -07002243 }
2244 }
2245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002247 dump_arp_table(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248}
2249
2250static void
2251lec_set_flush_tran_id(struct lec_priv *priv,
Mitchell Blank Jr61c33e02008-06-17 16:20:06 -07002252 const unsigned char *atm_addr, unsigned long tran_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253{
2254 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07002255 struct hlist_node *node;
Chas Williams1fa99612006-09-29 17:11:47 -07002256 struct lec_arp_table *entry;
2257 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258
2259 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002260 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
Joe Perchesc48192a2010-01-26 11:40:08 +00002261 hlist_for_each_entry(entry, node,
2262 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002263 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2264 entry->flush_tran_id = tran_id;
Stephen Hemminger52240062007-08-28 15:22:09 -07002265 pr_debug("Set flush transaction id to %lx for %p\n",
Joe Perches99824462010-01-26 11:40:00 +00002266 tran_id, entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002267 }
Chas Williamsd0732f62006-09-29 17:14:27 -07002268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2270}
2271
Chas Williams1fa99612006-09-29 17:11:47 -07002272static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273{
2274 unsigned long flags;
Chas Williams1fa99612006-09-29 17:11:47 -07002275 unsigned char mac_addr[] = {
2276 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2277 };
2278 struct lec_arp_table *to_add;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279 struct lec_vcc_priv *vpriv;
2280 int err = 0;
Chas Williams1fa99612006-09-29 17:11:47 -07002281
Joe Perchesc48192a2010-01-26 11:40:08 +00002282 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2283 if (!vpriv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 return -ENOMEM;
2285 vpriv->xoff = 0;
2286 vpriv->old_pop = vcc->pop;
2287 vcc->user_back = vpriv;
Chas Williams1fa99612006-09-29 17:11:47 -07002288 vcc->pop = lec_pop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002290 to_add = make_entry(priv, mac_addr);
2291 if (!to_add) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 vcc->pop = vpriv->old_pop;
2293 kfree(vpriv);
Chas Williams1fa99612006-09-29 17:11:47 -07002294 err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002296 }
2297 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2298 to_add->status = ESI_FORWARD_DIRECT;
2299 to_add->flags |= LEC_PERMANENT_FLAG;
2300 to_add->vcc = vcc;
2301 to_add->old_push = vcc->push;
2302 vcc->push = lec_push;
2303 priv->mcast_vcc = vcc;
2304 lec_arp_add(priv, to_add);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305out:
2306 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
Chas Williams1fa99612006-09-29 17:11:47 -07002307 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308}
2309
Chas Williams1fa99612006-09-29 17:11:47 -07002310static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311{
2312 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07002313 struct hlist_node *node, *next;
2314 struct lec_arp_table *entry;
Chas Williams1fa99612006-09-29 17:11:47 -07002315 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316
Stephen Hemminger52240062007-08-28 15:22:09 -07002317 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
Chas Williams1fa99612006-09-29 17:11:47 -07002318 dump_arp_table(priv);
Chas Williamsd0732f62006-09-29 17:14:27 -07002319
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Chas Williamsd0732f62006-09-29 17:14:27 -07002321
Chas Williams1fa99612006-09-29 17:11:47 -07002322 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
Joe Perchesc48192a2010-01-26 11:40:08 +00002323 hlist_for_each_entry_safe(entry, node, next,
2324 &priv->lec_arp_tables[i], next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002325 if (vcc == entry->vcc) {
2326 lec_arp_remove(priv, entry);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002327 lec_arp_put(entry);
Joe Perchesc48192a2010-01-26 11:40:08 +00002328 if (priv->mcast_vcc == vcc)
Chas Williams1fa99612006-09-29 17:11:47 -07002329 priv->mcast_vcc = NULL;
Chas Williams1fa99612006-09-29 17:11:47 -07002330 }
2331 }
2332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002333
Joe Perchesc48192a2010-01-26 11:40:08 +00002334 hlist_for_each_entry_safe(entry, node, next,
2335 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002336 if (entry->vcc == vcc) {
Chas Williams1fa99612006-09-29 17:11:47 -07002337 lec_arp_clear_vccs(entry);
2338 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07002339 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002340 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002341 }
Chas Williams1fa99612006-09-29 17:11:47 -07002342 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343
Joe Perchesc48192a2010-01-26 11:40:08 +00002344 hlist_for_each_entry_safe(entry, node, next,
2345 &priv->lec_no_forward, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002346 if (entry->recv_vcc == vcc) {
2347 lec_arp_clear_vccs(entry);
2348 del_timer(&entry->timer);
Chas Williamsd0732f62006-09-29 17:14:27 -07002349 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002350 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002351 }
Chas Williams1fa99612006-09-29 17:11:47 -07002352 }
2353
Chas Williamsd0732f62006-09-29 17:14:27 -07002354 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
Chas Williams1fa99612006-09-29 17:11:47 -07002355 if (entry->recv_vcc == vcc) {
2356 lec_arp_clear_vccs(entry);
2357 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
Chas Williamsd0732f62006-09-29 17:14:27 -07002358 hlist_del(&entry->next);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002359 lec_arp_put(entry);
Chas Williams1fa99612006-09-29 17:11:47 -07002360 }
Chas Williams1fa99612006-09-29 17:11:47 -07002361 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362
2363 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2364 dump_arp_table(priv);
2365}
2366
2367static void
2368lec_arp_check_empties(struct lec_priv *priv,
Chas Williams1fa99612006-09-29 17:11:47 -07002369 struct atm_vcc *vcc, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370{
Chas Williams1fa99612006-09-29 17:11:47 -07002371 unsigned long flags;
Chas Williamsd0732f62006-09-29 17:14:27 -07002372 struct hlist_node *node, *next;
2373 struct lec_arp_table *entry, *tmp;
Chas Williams1fa99612006-09-29 17:11:47 -07002374 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2375 unsigned char *src;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376#ifdef CONFIG_TR
Chas Williams1fa99612006-09-29 17:11:47 -07002377 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378
Chas Williams1fa99612006-09-29 17:11:47 -07002379 if (priv->is_trdev)
2380 src = tr_hdr->h_source;
2381 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382#endif
Chas Williams1fa99612006-09-29 17:11:47 -07002383 src = hdr->h_source;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384
2385 spin_lock_irqsave(&priv->lec_arp_lock, flags);
Joe Perchesc48192a2010-01-26 11:40:08 +00002386 hlist_for_each_entry_safe(entry, node, next,
2387 &priv->lec_arp_empty_ones, next) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002388 if (vcc == entry->vcc) {
2389 del_timer(&entry->timer);
2390 memcpy(entry->mac_addr, src, ETH_ALEN);
2391 entry->status = ESI_FORWARD_DIRECT;
2392 entry->last_used = jiffies;
2393 /* We might have got an entry */
Joe Perchesc48192a2010-01-26 11:40:08 +00002394 tmp = lec_arp_find(priv, src);
2395 if (tmp) {
Chas Williamsd0732f62006-09-29 17:14:27 -07002396 lec_arp_remove(priv, tmp);
Chas Williams33a9c2d2006-09-29 17:16:48 -07002397 lec_arp_put(tmp);
Chas Williamsd0732f62006-09-29 17:14:27 -07002398 }
2399 hlist_del(&entry->next);
2400 lec_arp_add(priv, entry);
2401 goto out;
Chas Williams1fa99612006-09-29 17:11:47 -07002402 }
Chas Williams1fa99612006-09-29 17:11:47 -07002403 }
Stephen Hemminger52240062007-08-28 15:22:09 -07002404 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405out:
2406 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2407}
Chas Williams1fa99612006-09-29 17:11:47 -07002408
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409MODULE_LICENSE("GPL");