2 * lec.c: Lan Emulation driver
4 * Marko Kiiskila <mkiiskila@yahoo.com>
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
16 #include <linux/skbuff.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
27 /* TokenRing if needed */
29 #include <linux/trdevice.h>
33 #include <linux/atmdev.h>
34 #include <linux/atmlec.h>
36 /* Proxy LEC knows about bridging */
37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
38 #include <linux/if_bridge.h>
39 #include "../bridge/br_private.h"
41 static unsigned char bridge_ula_lec
[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
45 #include <linux/module.h>
46 #include <linux/init.h>
50 #include "resources.h"
53 #define DPRINTK printk
55 #define DPRINTK(format,args...)
58 #define DUMP_PACKETS 0 /*
64 #define LEC_UNRES_QUE_LEN 8 /*
65 * number of tx packets to queue for a
66 * single destination while waiting for SVC
69 static int lec_open(struct net_device
*dev
);
70 static int lec_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
71 static int lec_close(struct net_device
*dev
);
72 static struct net_device_stats
*lec_get_stats(struct net_device
*dev
);
73 static void lec_init(struct net_device
*dev
);
74 static struct lec_arp_table
*lec_arp_find(struct lec_priv
*priv
,
75 unsigned char *mac_addr
);
76 static int lec_arp_remove(struct lec_priv
*priv
,
77 struct lec_arp_table
*to_remove
);
79 static void lane2_associate_ind(struct net_device
*dev
, u8
*mac_address
,
80 u8
*tlvs
, u32 sizeoftlvs
);
81 static int lane2_resolve(struct net_device
*dev
, u8
*dst_mac
, int force
,
82 u8
**tlvs
, u32
*sizeoftlvs
);
83 static int lane2_associate_req(struct net_device
*dev
, u8
*lan_dst
,
84 u8
*tlvs
, u32 sizeoftlvs
);
86 static int lec_addr_delete(struct lec_priv
*priv
, unsigned char *atm_addr
,
87 unsigned long permanent
);
88 static void lec_arp_check_empties(struct lec_priv
*priv
,
89 struct atm_vcc
*vcc
, struct sk_buff
*skb
);
90 static void lec_arp_destroy(struct lec_priv
*priv
);
91 static void lec_arp_init(struct lec_priv
*priv
);
92 static struct atm_vcc
*lec_arp_resolve(struct lec_priv
*priv
,
93 unsigned char *mac_to_find
,
95 struct lec_arp_table
**ret_entry
);
96 static void lec_arp_update(struct lec_priv
*priv
, unsigned char *mac_addr
,
97 unsigned char *atm_addr
, unsigned long remoteflag
,
98 unsigned int targetless_le_arp
);
99 static void lec_flush_complete(struct lec_priv
*priv
, unsigned long tran_id
);
100 static int lec_mcast_make(struct lec_priv
*priv
, struct atm_vcc
*vcc
);
101 static void lec_set_flush_tran_id(struct lec_priv
*priv
,
102 unsigned char *atm_addr
,
103 unsigned long tran_id
);
104 static void lec_vcc_added(struct lec_priv
*priv
, struct atmlec_ioc
*ioc_data
,
106 void (*old_push
) (struct atm_vcc
*vcc
,
107 struct sk_buff
*skb
));
108 static void lec_vcc_close(struct lec_priv
*priv
, struct atm_vcc
*vcc
);
110 /* must be done under lec_arp_lock */
111 static inline void lec_arp_hold(struct lec_arp_table
*entry
)
113 atomic_inc(&entry
->usage
);
116 static inline void lec_arp_put(struct lec_arp_table
*entry
)
118 if (atomic_dec_and_test(&entry
->usage
))
123 static struct lane2_ops lane2_ops
= {
124 lane2_resolve
, /* resolve, spec 3.1.3 */
125 lane2_associate_req
, /* associate_req, spec 3.1.4 */
126 NULL
/* associate indicator, spec 3.1.5 */
129 static unsigned char bus_mac
[ETH_ALEN
] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
131 /* Device structures */
132 static struct net_device
*dev_lec
[MAX_LEC_ITF
];
134 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
135 static void lec_handle_bridge(struct sk_buff
*skb
, struct net_device
*dev
)
139 struct lec_priv
*priv
;
142 * Check if this is a BPDU. If so, ask zeppelin to send
143 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
144 * as the Config BPDU has
146 eth
= (struct ethhdr
*)skb
->data
;
147 buff
= skb
->data
+ skb
->dev
->hard_header_len
;
148 if (*buff
++ == 0x42 && *buff
++ == 0x42 && *buff
++ == 0x03) {
150 struct sk_buff
*skb2
;
151 struct atmlec_msg
*mesg
;
153 skb2
= alloc_skb(sizeof(struct atmlec_msg
), GFP_ATOMIC
);
156 skb2
->len
= sizeof(struct atmlec_msg
);
157 mesg
= (struct atmlec_msg
*)skb2
->data
;
158 mesg
->type
= l_topology_change
;
160 mesg
->content
.normal
.flag
= *buff
& 0x01; /* 0x01 is topology change */
162 priv
= (struct lec_priv
*)dev
->priv
;
163 atm_force_charge(priv
->lecd
, skb2
->truesize
);
164 sk
= sk_atm(priv
->lecd
);
165 skb_queue_tail(&sk
->sk_receive_queue
, skb2
);
166 sk
->sk_data_ready(sk
, skb2
->len
);
171 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
174 * Modelled after tr_type_trans
175 * All multicast and ARE or STE frames go to BUS.
176 * Non source routed frames go by destination address.
177 * Last hop source routed frames go by destination address.
178 * Not last hop source routed frames go by _next_ route descriptor.
179 * Returns pointer to destination MAC address or fills in rdesc
183 static unsigned char *get_tr_dst(unsigned char *packet
, unsigned char *rdesc
)
186 int riflen
, num_rdsc
;
188 trh
= (struct trh_hdr
*)packet
;
189 if (trh
->daddr
[0] & (uint8_t) 0x80)
190 return bus_mac
; /* multicast */
192 if (trh
->saddr
[0] & TR_RII
) {
193 riflen
= (ntohs(trh
->rcf
) & TR_RCF_LEN_MASK
) >> 8;
194 if ((ntohs(trh
->rcf
) >> 13) != 0)
195 return bus_mac
; /* ARE or STE */
197 return trh
->daddr
; /* not source routed */
200 return trh
->daddr
; /* last hop, source routed */
202 /* riflen is 6 or more, packet has more than one route descriptor */
203 num_rdsc
= (riflen
/ 2) - 1;
204 memset(rdesc
, 0, ETH_ALEN
);
205 /* offset 4 comes from LAN destination field in LE control frames */
206 if (trh
->rcf
& htons((uint16_t) TR_RCF_DIR_BIT
))
207 memcpy(&rdesc
[4], &trh
->rseg
[num_rdsc
- 2], sizeof(__be16
));
209 memcpy(&rdesc
[4], &trh
->rseg
[1], sizeof(__be16
));
210 rdesc
[5] = ((ntohs(trh
->rseg
[0]) & 0x000f) | (rdesc
[5] & 0xf0));
215 #endif /* CONFIG_TR */
218 * Open/initialize the netdevice. This is called (in the current kernel)
219 * sometime after booting when the 'ifconfig' program is run.
221 * This routine should set everything up anew at each open, even
222 * registers that "should" only need to be set once at boot, so that
223 * there is non-reboot way to recover if something goes wrong.
226 static int lec_open(struct net_device
*dev
)
228 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
230 netif_start_queue(dev
);
231 memset(&priv
->stats
, 0, sizeof(struct net_device_stats
));
236 static __inline__
void
237 lec_send(struct atm_vcc
*vcc
, struct sk_buff
*skb
, struct lec_priv
*priv
)
239 ATM_SKB(skb
)->vcc
= vcc
;
240 ATM_SKB(skb
)->atm_options
= vcc
->atm_options
;
242 atomic_add(skb
->truesize
, &sk_atm(vcc
)->sk_wmem_alloc
);
243 if (vcc
->send(vcc
, skb
) < 0) {
244 priv
->stats
.tx_dropped
++;
248 priv
->stats
.tx_packets
++;
249 priv
->stats
.tx_bytes
+= skb
->len
;
252 static void lec_tx_timeout(struct net_device
*dev
)
254 printk(KERN_INFO
"%s: tx timeout\n", dev
->name
);
255 dev
->trans_start
= jiffies
;
256 netif_wake_queue(dev
);
259 static int lec_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
261 struct sk_buff
*skb2
;
262 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
263 struct lecdatahdr_8023
*lec_h
;
265 struct lec_arp_table
*entry
;
269 unsigned char rdesc
[ETH_ALEN
]; /* Token Ring route descriptor */
275 #endif /* DUMP_PACKETS >0 */
277 DPRINTK("lec_start_xmit called\n");
279 printk("%s:No lecd attached\n", dev
->name
);
280 priv
->stats
.tx_errors
++;
281 netif_stop_queue(dev
);
285 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
286 (long)skb
->head
, (long)skb
->data
, (long)skb
->tail
,
288 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
289 if (memcmp(skb
->data
, bridge_ula_lec
, sizeof(bridge_ula_lec
)) == 0)
290 lec_handle_bridge(skb
, dev
);
293 /* Make sure we have room for lec_id */
294 if (skb_headroom(skb
) < 2) {
296 DPRINTK("lec_start_xmit: reallocating skb\n");
297 skb2
= skb_realloc_headroom(skb
, LEC_HEADER_LEN
);
305 /* Put le header to place, works for TokenRing too */
306 lec_h
= (struct lecdatahdr_8023
*)skb
->data
;
307 lec_h
->le_header
= htons(priv
->lecid
);
311 * Ugly. Use this to realign Token Ring packets for
312 * e.g. PCA-200E driver.
314 if (priv
->is_trdev
) {
315 skb2
= skb_realloc_headroom(skb
, LEC_HEADER_LEN
);
324 printk("%s: send datalen:%ld lecid:%4.4x\n", dev
->name
,
325 skb
->len
, priv
->lecid
);
326 #if DUMP_PACKETS >= 2
327 for (i
= 0; i
< skb
->len
&& i
< 99; i
++) {
328 sprintf(buf
+ i
* 3, "%2.2x ", 0xff & skb
->data
[i
]);
330 #elif DUMP_PACKETS >= 1
331 for (i
= 0; i
< skb
->len
&& i
< 30; i
++) {
332 sprintf(buf
+ i
* 3, "%2.2x ", 0xff & skb
->data
[i
]);
334 #endif /* DUMP_PACKETS >= 1 */
338 printk("%s...\n", buf
);
339 #endif /* DUMP_PACKETS > 0 */
341 /* Minimum ethernet-frame size */
344 min_frame_size
= LEC_MINIMUM_8025_SIZE
;
347 min_frame_size
= LEC_MINIMUM_8023_SIZE
;
348 if (skb
->len
< min_frame_size
) {
349 if ((skb
->len
+ skb_tailroom(skb
)) < min_frame_size
) {
350 skb2
= skb_copy_expand(skb
, 0,
351 min_frame_size
- skb
->truesize
,
355 priv
->stats
.tx_dropped
++;
360 skb_put(skb
, min_frame_size
- skb
->len
);
363 /* Send to right vcc */
367 if (priv
->is_trdev
) {
368 dst
= get_tr_dst(skb
->data
+ 2, rdesc
);
376 vcc
= lec_arp_resolve(priv
, dst
, is_rdesc
, &entry
);
377 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev
->name
,
378 vcc
, vcc
? vcc
->flags
: 0, entry
);
379 if (!vcc
|| !test_bit(ATM_VF_READY
, &vcc
->flags
)) {
380 if (entry
&& (entry
->tx_wait
.qlen
< LEC_UNRES_QUE_LEN
)) {
381 DPRINTK("%s:lec_start_xmit: queuing packet, ",
383 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
384 lec_h
->h_dest
[0], lec_h
->h_dest
[1],
385 lec_h
->h_dest
[2], lec_h
->h_dest
[3],
386 lec_h
->h_dest
[4], lec_h
->h_dest
[5]);
387 skb_queue_tail(&entry
->tx_wait
, skb
);
390 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
392 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
393 lec_h
->h_dest
[0], lec_h
->h_dest
[1],
394 lec_h
->h_dest
[2], lec_h
->h_dest
[3],
395 lec_h
->h_dest
[4], lec_h
->h_dest
[5]);
396 priv
->stats
.tx_dropped
++;
402 printk("%s:sending to vpi:%d vci:%d\n", dev
->name
, vcc
->vpi
, vcc
->vci
);
403 #endif /* DUMP_PACKETS > 0 */
405 while (entry
&& (skb2
= skb_dequeue(&entry
->tx_wait
))) {
406 DPRINTK("lec.c: emptying tx queue, ");
407 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
408 lec_h
->h_dest
[0], lec_h
->h_dest
[1], lec_h
->h_dest
[2],
409 lec_h
->h_dest
[3], lec_h
->h_dest
[4], lec_h
->h_dest
[5]);
410 lec_send(vcc
, skb2
, priv
);
413 lec_send(vcc
, skb
, priv
);
415 if (!atm_may_send(vcc
, 0)) {
416 struct lec_vcc_priv
*vpriv
= LEC_VCC_PRIV(vcc
);
419 netif_stop_queue(dev
);
422 * vcc->pop() might have occurred in between, making
423 * the vcc usuable again. Since xmit is serialized,
424 * this is the only situation we have to re-test.
427 if (atm_may_send(vcc
, 0))
428 netif_wake_queue(dev
);
434 dev
->trans_start
= jiffies
;
438 /* The inverse routine to net_open(). */
439 static int lec_close(struct net_device
*dev
)
441 netif_stop_queue(dev
);
446 * Get the current statistics.
447 * This may be called with the card open or closed.
449 static struct net_device_stats
*lec_get_stats(struct net_device
*dev
)
451 return &((struct lec_priv
*)dev
->priv
)->stats
;
454 static int lec_atm_send(struct atm_vcc
*vcc
, struct sk_buff
*skb
)
457 struct net_device
*dev
= (struct net_device
*)vcc
->proto_data
;
458 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
459 struct atmlec_msg
*mesg
;
460 struct lec_arp_table
*entry
;
462 char *tmp
; /* FIXME */
464 atomic_sub(skb
->truesize
, &sk_atm(vcc
)->sk_wmem_alloc
);
465 mesg
= (struct atmlec_msg
*)skb
->data
;
467 tmp
+= sizeof(struct atmlec_msg
);
468 DPRINTK("%s: msg from zeppelin:%d\n", dev
->name
, mesg
->type
);
469 switch (mesg
->type
) {
471 for (i
= 0; i
< 6; i
++) {
472 dev
->dev_addr
[i
] = mesg
->content
.normal
.mac_addr
[i
];
476 for (i
= 0; i
< 6; i
++) {
477 dev
->dev_addr
[i
] = 0;
481 lec_addr_delete(priv
, mesg
->content
.normal
.atm_addr
,
482 mesg
->content
.normal
.flag
);
484 case l_topology_change
:
485 priv
->topology_change
= mesg
->content
.normal
.flag
;
487 case l_flush_complete
:
488 lec_flush_complete(priv
, mesg
->content
.normal
.flag
);
490 case l_narp_req
: /* LANE2: see 7.1.35 in the lane2 spec */
491 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
492 entry
= lec_arp_find(priv
, mesg
->content
.normal
.mac_addr
);
493 lec_arp_remove(priv
, entry
);
494 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
496 if (mesg
->content
.normal
.no_source_le_narp
)
500 lec_arp_update(priv
, mesg
->content
.normal
.mac_addr
,
501 mesg
->content
.normal
.atm_addr
,
502 mesg
->content
.normal
.flag
,
503 mesg
->content
.normal
.targetless_le_arp
);
504 DPRINTK("lec: in l_arp_update\n");
505 if (mesg
->sizeoftlvs
!= 0) { /* LANE2 3.1.5 */
506 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
508 lane2_associate_ind(dev
, mesg
->content
.normal
.mac_addr
,
509 tmp
, mesg
->sizeoftlvs
);
513 priv
->maximum_unknown_frame_count
=
514 mesg
->content
.config
.maximum_unknown_frame_count
;
515 priv
->max_unknown_frame_time
=
516 (mesg
->content
.config
.max_unknown_frame_time
* HZ
);
517 priv
->max_retry_count
= mesg
->content
.config
.max_retry_count
;
518 priv
->aging_time
= (mesg
->content
.config
.aging_time
* HZ
);
519 priv
->forward_delay_time
=
520 (mesg
->content
.config
.forward_delay_time
* HZ
);
521 priv
->arp_response_time
=
522 (mesg
->content
.config
.arp_response_time
* HZ
);
523 priv
->flush_timeout
= (mesg
->content
.config
.flush_timeout
* HZ
);
524 priv
->path_switching_delay
=
525 (mesg
->content
.config
.path_switching_delay
* HZ
);
526 priv
->lane_version
= mesg
->content
.config
.lane_version
; /* LANE2 */
527 priv
->lane2_ops
= NULL
;
528 if (priv
->lane_version
> 1)
529 priv
->lane2_ops
= &lane2_ops
;
530 if (dev
->change_mtu(dev
, mesg
->content
.config
.mtu
))
531 printk("%s: change_mtu to %d failed\n", dev
->name
,
532 mesg
->content
.config
.mtu
);
533 priv
->is_proxy
= mesg
->content
.config
.is_proxy
;
535 case l_flush_tran_id
:
536 lec_set_flush_tran_id(priv
, mesg
->content
.normal
.atm_addr
,
537 mesg
->content
.normal
.flag
);
541 (unsigned short)(0xffff & mesg
->content
.normal
.flag
);
543 case l_should_bridge
:
544 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
546 struct net_bridge_fdb_entry
*f
;
549 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
550 dev
->name
, mesg
->content
.proxy
.mac_addr
[0],
551 mesg
->content
.proxy
.mac_addr
[1],
552 mesg
->content
.proxy
.mac_addr
[2],
553 mesg
->content
.proxy
.mac_addr
[3],
554 mesg
->content
.proxy
.mac_addr
[4],
555 mesg
->content
.proxy
.mac_addr
[5]);
557 if (br_fdb_get_hook
== NULL
|| dev
->br_port
== NULL
)
560 f
= br_fdb_get_hook(dev
->br_port
->br
,
561 mesg
->content
.proxy
.mac_addr
);
562 if (f
!= NULL
&& f
->dst
->dev
!= dev
563 && f
->dst
->state
== BR_STATE_FORWARDING
) {
564 /* hit from bridge table, send LE_ARP_RESPONSE */
565 struct sk_buff
*skb2
;
569 ("%s: entry found, responding to zeppelin\n",
572 alloc_skb(sizeof(struct atmlec_msg
),
578 skb2
->len
= sizeof(struct atmlec_msg
);
579 memcpy(skb2
->data
, mesg
,
580 sizeof(struct atmlec_msg
));
581 atm_force_charge(priv
->lecd
, skb2
->truesize
);
582 sk
= sk_atm(priv
->lecd
);
583 skb_queue_tail(&sk
->sk_receive_queue
, skb2
);
584 sk
->sk_data_ready(sk
, skb2
->len
);
589 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
592 printk("%s: Unknown message type %d\n", dev
->name
, mesg
->type
);
600 static void lec_atm_close(struct atm_vcc
*vcc
)
603 struct net_device
*dev
= (struct net_device
*)vcc
->proto_data
;
604 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
607 /* Do something needful? */
609 netif_stop_queue(dev
);
610 lec_arp_destroy(priv
);
612 if (skb_peek(&sk_atm(vcc
)->sk_receive_queue
))
613 printk("%s lec_atm_close: closing with messages pending\n",
615 while ((skb
= skb_dequeue(&sk_atm(vcc
)->sk_receive_queue
)) != NULL
) {
616 atm_return(vcc
, skb
->truesize
);
620 printk("%s: Shut down!\n", dev
->name
);
621 module_put(THIS_MODULE
);
624 static struct atmdev_ops lecdev_ops
= {
625 .close
= lec_atm_close
,
629 static struct atm_dev lecatm_dev
= {
632 .number
= 999, /* dummy device number */
633 .lock
= SPIN_LOCK_UNLOCKED
637 * LANE2: new argument struct sk_buff *data contains
638 * the LE_ARP based TLVs introduced in the LANE2 spec
641 send_to_lecd(struct lec_priv
*priv
, atmlec_msg_type type
,
642 unsigned char *mac_addr
, unsigned char *atm_addr
,
643 struct sk_buff
*data
)
647 struct atmlec_msg
*mesg
;
649 if (!priv
|| !priv
->lecd
) {
652 skb
= alloc_skb(sizeof(struct atmlec_msg
), GFP_ATOMIC
);
655 skb
->len
= sizeof(struct atmlec_msg
);
656 mesg
= (struct atmlec_msg
*)skb
->data
;
657 memset(mesg
, 0, sizeof(struct atmlec_msg
));
660 mesg
->sizeoftlvs
= data
->len
;
662 memcpy(&mesg
->content
.normal
.mac_addr
, mac_addr
, ETH_ALEN
);
664 mesg
->content
.normal
.targetless_le_arp
= 1;
666 memcpy(&mesg
->content
.normal
.atm_addr
, atm_addr
, ATM_ESA_LEN
);
668 atm_force_charge(priv
->lecd
, skb
->truesize
);
669 sk
= sk_atm(priv
->lecd
);
670 skb_queue_tail(&sk
->sk_receive_queue
, skb
);
671 sk
->sk_data_ready(sk
, skb
->len
);
674 DPRINTK("lec: about to send %d bytes of data\n", data
->len
);
675 atm_force_charge(priv
->lecd
, data
->truesize
);
676 skb_queue_tail(&sk
->sk_receive_queue
, data
);
677 sk
->sk_data_ready(sk
, skb
->len
);
683 /* shamelessly stolen from drivers/net/net_init.c */
684 static int lec_change_mtu(struct net_device
*dev
, int new_mtu
)
686 if ((new_mtu
< 68) || (new_mtu
> 18190))
692 static void lec_set_multicast_list(struct net_device
*dev
)
695 * by default, all multicast frames arrive over the bus.
696 * eventually support selective multicast service
701 static void lec_init(struct net_device
*dev
)
703 dev
->change_mtu
= lec_change_mtu
;
704 dev
->open
= lec_open
;
705 dev
->stop
= lec_close
;
706 dev
->hard_start_xmit
= lec_start_xmit
;
707 dev
->tx_timeout
= lec_tx_timeout
;
709 dev
->get_stats
= lec_get_stats
;
710 dev
->set_multicast_list
= lec_set_multicast_list
;
711 dev
->do_ioctl
= NULL
;
712 printk("%s: Initialized!\n", dev
->name
);
716 static unsigned char lec_ctrl_magic
[] = {
723 #define LEC_DATA_DIRECT_8023 2
724 #define LEC_DATA_DIRECT_8025 3
726 static int lec_is_data_direct(struct atm_vcc
*vcc
)
728 return ((vcc
->sap
.blli
[0].l3
.tr9577
.snap
[4] == LEC_DATA_DIRECT_8023
) ||
729 (vcc
->sap
.blli
[0].l3
.tr9577
.snap
[4] == LEC_DATA_DIRECT_8025
));
732 static void lec_push(struct atm_vcc
*vcc
, struct sk_buff
*skb
)
735 struct net_device
*dev
= (struct net_device
*)vcc
->proto_data
;
736 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
742 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev
->name
,
746 DPRINTK("%s: null skb\n", dev
->name
);
747 lec_vcc_close(priv
, vcc
);
751 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev
->name
,
752 skb
->len
, priv
->lecid
);
753 #if DUMP_PACKETS >= 2
754 for (i
= 0; i
< skb
->len
&& i
< 99; i
++) {
755 sprintf(buf
+ i
* 3, "%2.2x ", 0xff & skb
->data
[i
]);
757 #elif DUMP_PACKETS >= 1
758 for (i
= 0; i
< skb
->len
&& i
< 30; i
++) {
759 sprintf(buf
+ i
* 3, "%2.2x ", 0xff & skb
->data
[i
]);
761 #endif /* DUMP_PACKETS >= 1 */
765 printk("%s...\n", buf
);
766 #endif /* DUMP_PACKETS > 0 */
767 if (memcmp(skb
->data
, lec_ctrl_magic
, 4) == 0) { /* Control frame, to daemon */
768 struct sock
*sk
= sk_atm(vcc
);
770 DPRINTK("%s: To daemon\n", dev
->name
);
771 skb_queue_tail(&sk
->sk_receive_queue
, skb
);
772 sk
->sk_data_ready(sk
, skb
->len
);
773 } else { /* Data frame, queue to protocol handlers */
774 struct lec_arp_table
*entry
;
775 unsigned char *src
, *dst
;
777 atm_return(vcc
, skb
->truesize
);
778 if (*(__be16
*) skb
->data
== htons(priv
->lecid
) ||
779 !priv
->lecd
|| !(dev
->flags
& IFF_UP
)) {
781 * Probably looping back, or if lecd is missing,
784 DPRINTK("Ignoring frame...\n");
790 dst
= ((struct lecdatahdr_8025
*)skb
->data
)->h_dest
;
793 dst
= ((struct lecdatahdr_8023
*)skb
->data
)->h_dest
;
796 * If this is a Data Direct VCC, and the VCC does not match
797 * the LE_ARP cache entry, delete the LE_ARP cache entry.
799 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
800 if (lec_is_data_direct(vcc
)) {
804 ((struct lecdatahdr_8025
*)skb
->data
)->
809 ((struct lecdatahdr_8023
*)skb
->data
)->
811 entry
= lec_arp_find(priv
, src
);
812 if (entry
&& entry
->vcc
!= vcc
) {
813 lec_arp_remove(priv
, entry
);
817 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
819 if (!(dst
[0] & 0x01) && /* Never filter Multi/Broadcast */
820 !priv
->is_proxy
&& /* Proxy wants all the packets */
821 memcmp(dst
, dev
->dev_addr
, dev
->addr_len
)) {
825 if (!hlist_empty(&priv
->lec_arp_empty_ones
)) {
826 lec_arp_check_empties(priv
, vcc
, skb
);
828 skb_pull(skb
, 2); /* skip lec_id */
831 skb
->protocol
= tr_type_trans(skb
, dev
);
836 skb
->protocol
= eth_type_trans(skb
, dev
);
838 priv
->stats
.rx_packets
++;
839 priv
->stats
.rx_bytes
+= skb
->len
;
840 memset(ATM_SKB(skb
), 0, sizeof(struct atm_skb_data
));
845 static void lec_pop(struct atm_vcc
*vcc
, struct sk_buff
*skb
)
847 struct lec_vcc_priv
*vpriv
= LEC_VCC_PRIV(vcc
);
848 struct net_device
*dev
= skb
->dev
;
851 printk("lec_pop(): vpriv = NULL!?!?!?\n");
855 vpriv
->old_pop(vcc
, skb
);
857 if (vpriv
->xoff
&& atm_may_send(vcc
, 0)) {
859 if (netif_running(dev
) && netif_queue_stopped(dev
))
860 netif_wake_queue(dev
);
864 static int lec_vcc_attach(struct atm_vcc
*vcc
, void __user
*arg
)
866 struct lec_vcc_priv
*vpriv
;
868 struct atmlec_ioc ioc_data
;
870 /* Lecd must be up in this case */
871 bytes_left
= copy_from_user(&ioc_data
, arg
, sizeof(struct atmlec_ioc
));
872 if (bytes_left
!= 0) {
874 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
877 if (ioc_data
.dev_num
< 0 || ioc_data
.dev_num
>= MAX_LEC_ITF
||
878 !dev_lec
[ioc_data
.dev_num
])
880 if (!(vpriv
= kmalloc(sizeof(struct lec_vcc_priv
), GFP_KERNEL
)))
883 vpriv
->old_pop
= vcc
->pop
;
884 vcc
->user_back
= vpriv
;
886 lec_vcc_added(dev_lec
[ioc_data
.dev_num
]->priv
,
887 &ioc_data
, vcc
, vcc
->push
);
888 vcc
->proto_data
= dev_lec
[ioc_data
.dev_num
];
889 vcc
->push
= lec_push
;
893 static int lec_mcast_attach(struct atm_vcc
*vcc
, int arg
)
895 if (arg
< 0 || arg
>= MAX_LEC_ITF
|| !dev_lec
[arg
])
897 vcc
->proto_data
= dev_lec
[arg
];
898 return (lec_mcast_make((struct lec_priv
*)dev_lec
[arg
]->priv
, vcc
));
901 /* Initialize device. */
902 static int lecd_attach(struct atm_vcc
*vcc
, int arg
)
905 struct lec_priv
*priv
;
912 if (arg
>= MAX_LEC_ITF
)
914 #else /* Reserve the top NUM_TR_DEVS for TR */
915 if (arg
>= (MAX_LEC_ITF
- NUM_TR_DEVS
))
922 if (i
>= (MAX_LEC_ITF
- NUM_TR_DEVS
))
925 size
= sizeof(struct lec_priv
);
928 dev_lec
[i
] = alloc_trdev(size
);
931 dev_lec
[i
] = alloc_etherdev(size
);
934 snprintf(dev_lec
[i
]->name
, IFNAMSIZ
, "lec%d", i
);
935 if (register_netdev(dev_lec
[i
])) {
936 free_netdev(dev_lec
[i
]);
940 priv
= dev_lec
[i
]->priv
;
941 priv
->is_trdev
= is_trdev
;
942 lec_init(dev_lec
[i
]);
944 priv
= dev_lec
[i
]->priv
;
949 priv
->itfnum
= i
; /* LANE2 addition */
951 vcc
->dev
= &lecatm_dev
;
952 vcc_insert_socket(sk_atm(vcc
));
954 vcc
->proto_data
= dev_lec
[i
];
955 set_bit(ATM_VF_META
, &vcc
->flags
);
956 set_bit(ATM_VF_READY
, &vcc
->flags
);
958 /* Set default values to these variables */
959 priv
->maximum_unknown_frame_count
= 1;
960 priv
->max_unknown_frame_time
= (1 * HZ
);
961 priv
->vcc_timeout_period
= (1200 * HZ
);
962 priv
->max_retry_count
= 1;
963 priv
->aging_time
= (300 * HZ
);
964 priv
->forward_delay_time
= (15 * HZ
);
965 priv
->topology_change
= 0;
966 priv
->arp_response_time
= (1 * HZ
);
967 priv
->flush_timeout
= (4 * HZ
);
968 priv
->path_switching_delay
= (6 * HZ
);
970 if (dev_lec
[i
]->flags
& IFF_UP
) {
971 netif_start_queue(dev_lec
[i
]);
973 __module_get(THIS_MODULE
);
977 #ifdef CONFIG_PROC_FS
978 static char *lec_arp_get_status_string(unsigned char status
)
980 static char *lec_arp_status_string
[] = {
985 "ESI_FLUSH_PENDING ",
989 if (status
> ESI_FORWARD_DIRECT
)
990 status
= 3; /* ESI_UNDEFINED */
991 return lec_arp_status_string
[status
];
994 static void lec_info(struct seq_file
*seq
, struct lec_arp_table
*entry
)
998 for (i
= 0; i
< ETH_ALEN
; i
++)
999 seq_printf(seq
, "%2.2x", entry
->mac_addr
[i
] & 0xff);
1000 seq_printf(seq
, " ");
1001 for (i
= 0; i
< ATM_ESA_LEN
; i
++)
1002 seq_printf(seq
, "%2.2x", entry
->atm_addr
[i
] & 0xff);
1003 seq_printf(seq
, " %s %4.4x", lec_arp_get_status_string(entry
->status
),
1004 entry
->flags
& 0xffff);
1006 seq_printf(seq
, "%3d %3d ", entry
->vcc
->vpi
, entry
->vcc
->vci
);
1008 seq_printf(seq
, " ");
1009 if (entry
->recv_vcc
) {
1010 seq_printf(seq
, " %3d %3d", entry
->recv_vcc
->vpi
,
1011 entry
->recv_vcc
->vci
);
1013 seq_putc(seq
, '\n');
1017 unsigned long flags
;
1018 struct lec_priv
*locked
;
1019 struct hlist_node
*node
;
1020 struct net_device
*dev
;
1026 static void *lec_tbl_walk(struct lec_state
*state
, struct hlist_head
*tbl
,
1029 struct hlist_node
*e
= state
->node
;
1030 struct lec_arp_table
*tmp
;
1034 if (e
== (void *)1) {
1039 hlist_for_each_entry_from(tmp
, e
, next
) {
1045 return (*l
< 0) ? state
: NULL
;
1048 static void *lec_arp_walk(struct lec_state
*state
, loff_t
*l
,
1049 struct lec_priv
*priv
)
1054 for (p
= state
->arp_table
; p
< LEC_ARP_TABLE_SIZE
; p
++) {
1055 v
= lec_tbl_walk(state
, &priv
->lec_arp_tables
[p
], l
);
1059 state
->arp_table
= p
;
1063 static void *lec_misc_walk(struct lec_state
*state
, loff_t
*l
,
1064 struct lec_priv
*priv
)
1066 struct hlist_head
*lec_misc_tables
[] = {
1067 &priv
->lec_arp_empty_ones
,
1068 &priv
->lec_no_forward
,
1074 for (q
= state
->misc_table
; q
< ARRAY_SIZE(lec_misc_tables
); q
++) {
1075 v
= lec_tbl_walk(state
, lec_misc_tables
[q
], l
);
1079 state
->misc_table
= q
;
1083 static void *lec_priv_walk(struct lec_state
*state
, loff_t
*l
,
1084 struct lec_priv
*priv
)
1086 if (!state
->locked
) {
1087 state
->locked
= priv
;
1088 spin_lock_irqsave(&priv
->lec_arp_lock
, state
->flags
);
1090 if (!lec_arp_walk(state
, l
, priv
) && !lec_misc_walk(state
, l
, priv
)) {
1091 spin_unlock_irqrestore(&priv
->lec_arp_lock
, state
->flags
);
1092 state
->locked
= NULL
;
1093 /* Partial state reset for the next time we get called */
1094 state
->arp_table
= state
->misc_table
= 0;
1096 return state
->locked
;
1099 static void *lec_itf_walk(struct lec_state
*state
, loff_t
*l
)
1101 struct net_device
*dev
;
1104 dev
= state
->dev
? state
->dev
: dev_lec
[state
->itf
];
1105 v
= (dev
&& dev
->priv
) ? lec_priv_walk(state
, l
, dev
->priv
) : NULL
;
1108 /* Partial state reset for the next time we get called */
1115 static void *lec_get_idx(struct lec_state
*state
, loff_t l
)
1119 for (; state
->itf
< MAX_LEC_ITF
; state
->itf
++) {
1120 v
= lec_itf_walk(state
, &l
);
1127 static void *lec_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1129 struct lec_state
*state
= seq
->private;
1133 state
->locked
= NULL
;
1134 state
->arp_table
= 0;
1135 state
->misc_table
= 0;
1136 state
->node
= (void *)1;
1138 return *pos
? lec_get_idx(state
, *pos
) : (void *)1;
1141 static void lec_seq_stop(struct seq_file
*seq
, void *v
)
1143 struct lec_state
*state
= seq
->private;
1146 spin_unlock_irqrestore(&state
->locked
->lec_arp_lock
,
1148 dev_put(state
->dev
);
1152 static void *lec_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1154 struct lec_state
*state
= seq
->private;
1156 v
= lec_get_idx(state
, 1);
1157 *pos
+= !!PTR_ERR(v
);
1161 static int lec_seq_show(struct seq_file
*seq
, void *v
)
1163 static char lec_banner
[] = "Itf MAC ATM destination"
1165 "VPI/VCI Recv VPI/VCI\n";
1168 seq_puts(seq
, lec_banner
);
1170 struct lec_state
*state
= seq
->private;
1171 struct net_device
*dev
= state
->dev
;
1172 struct lec_arp_table
*entry
= hlist_entry(state
->node
, struct lec_arp_table
, next
);
1174 seq_printf(seq
, "%s ", dev
->name
);
1175 lec_info(seq
, entry
);
1180 static struct seq_operations lec_seq_ops
= {
1181 .start
= lec_seq_start
,
1182 .next
= lec_seq_next
,
1183 .stop
= lec_seq_stop
,
1184 .show
= lec_seq_show
,
1187 static int lec_seq_open(struct inode
*inode
, struct file
*file
)
1189 struct lec_state
*state
;
1190 struct seq_file
*seq
;
1193 state
= kmalloc(sizeof(*state
), GFP_KERNEL
);
1199 rc
= seq_open(file
, &lec_seq_ops
);
1202 seq
= file
->private_data
;
1203 seq
->private = state
;
1212 static int lec_seq_release(struct inode
*inode
, struct file
*file
)
1214 return seq_release_private(inode
, file
);
1217 static const struct file_operations lec_seq_fops
= {
1218 .owner
= THIS_MODULE
,
1219 .open
= lec_seq_open
,
1221 .llseek
= seq_lseek
,
1222 .release
= lec_seq_release
,
1226 static int lane_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
1228 struct atm_vcc
*vcc
= ATM_SD(sock
);
1235 if (!capable(CAP_NET_ADMIN
))
1239 return -ENOIOCTLCMD
;
1244 err
= lecd_attach(vcc
, (int)arg
);
1246 sock
->state
= SS_CONNECTED
;
1249 err
= lec_mcast_attach(vcc
, (int)arg
);
1252 err
= lec_vcc_attach(vcc
, (void __user
*)arg
);
1259 static struct atm_ioctl lane_ioctl_ops
= {
1260 .owner
= THIS_MODULE
,
1261 .ioctl
= lane_ioctl
,
1264 static int __init
lane_module_init(void)
1266 #ifdef CONFIG_PROC_FS
1267 struct proc_dir_entry
*p
;
1269 p
= create_proc_entry("lec", S_IRUGO
, atm_proc_root
);
1271 p
->proc_fops
= &lec_seq_fops
;
1274 register_atm_ioctl(&lane_ioctl_ops
);
1275 printk("lec.c: " __DATE__
" " __TIME__
" initialized\n");
1279 static void __exit
lane_module_cleanup(void)
1282 struct lec_priv
*priv
;
1284 remove_proc_entry("lec", atm_proc_root
);
1286 deregister_atm_ioctl(&lane_ioctl_ops
);
1288 for (i
= 0; i
< MAX_LEC_ITF
; i
++) {
1289 if (dev_lec
[i
] != NULL
) {
1290 priv
= (struct lec_priv
*)dev_lec
[i
]->priv
;
1291 unregister_netdev(dev_lec
[i
]);
1292 free_netdev(dev_lec
[i
]);
1300 module_init(lane_module_init
);
1301 module_exit(lane_module_cleanup
);
1304 * LANE2: 3.1.3, LE_RESOLVE.request
1305 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1306 * If sizeoftlvs == NULL the default TLVs associated with with this
1308 * If dst_mac == NULL, targetless LE_ARP will be sent
1310 static int lane2_resolve(struct net_device
*dev
, u8
*dst_mac
, int force
,
1311 u8
**tlvs
, u32
*sizeoftlvs
)
1313 unsigned long flags
;
1314 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
1315 struct lec_arp_table
*table
;
1316 struct sk_buff
*skb
;
1320 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
1321 table
= lec_arp_find(priv
, dst_mac
);
1322 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
1326 *tlvs
= kmemdup(table
->tlvs
, table
->sizeoftlvs
, GFP_ATOMIC
);
1330 *sizeoftlvs
= table
->sizeoftlvs
;
1335 if (sizeoftlvs
== NULL
)
1336 retval
= send_to_lecd(priv
, l_arp_xmt
, dst_mac
, NULL
, NULL
);
1339 skb
= alloc_skb(*sizeoftlvs
, GFP_ATOMIC
);
1342 skb
->len
= *sizeoftlvs
;
1343 memcpy(skb
->data
, *tlvs
, *sizeoftlvs
);
1344 retval
= send_to_lecd(priv
, l_arp_xmt
, dst_mac
, NULL
, skb
);
1350 * LANE2: 3.1.4, LE_ASSOCIATE.request
1351 * Associate the *tlvs with the *lan_dst address.
1352 * Will overwrite any previous association
1353 * Returns 1 for success, 0 for failure (out of memory)
1356 static int lane2_associate_req(struct net_device
*dev
, u8
*lan_dst
,
1357 u8
*tlvs
, u32 sizeoftlvs
)
1360 struct sk_buff
*skb
;
1361 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
1363 if (compare_ether_addr(lan_dst
, dev
->dev_addr
))
1364 return (0); /* not our mac address */
1366 kfree(priv
->tlvs
); /* NULL if there was no previous association */
1368 priv
->tlvs
= kmemdup(tlvs
, sizeoftlvs
, GFP_KERNEL
);
1369 if (priv
->tlvs
== NULL
)
1371 priv
->sizeoftlvs
= sizeoftlvs
;
1373 skb
= alloc_skb(sizeoftlvs
, GFP_ATOMIC
);
1376 skb
->len
= sizeoftlvs
;
1377 memcpy(skb
->data
, tlvs
, sizeoftlvs
);
1378 retval
= send_to_lecd(priv
, l_associate_req
, NULL
, NULL
, skb
);
1380 printk("lec.c: lane2_associate_req() failed\n");
1382 * If the previous association has changed we must
1383 * somehow notify other LANE entities about the change
1389 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1392 static void lane2_associate_ind(struct net_device
*dev
, u8
*mac_addr
,
1393 u8
*tlvs
, u32 sizeoftlvs
)
1398 struct lec_priv
*priv
= (struct lec_priv
*)dev
->priv
;
1400 * Why have the TLVs in LE_ARP entries
1401 * since we do not use them? When you
1402 * uncomment this code, make sure the
1403 * TLVs get freed when entry is killed
1405 struct lec_arp_table
*entry
= lec_arp_find(priv
, mac_addr
);
1408 return; /* should not happen */
1412 entry
->tlvs
= kmemdup(tlvs
, sizeoftlvs
, GFP_KERNEL
);
1413 if (entry
->tlvs
== NULL
)
1415 entry
->sizeoftlvs
= sizeoftlvs
;
1418 printk("lec.c: lane2_associate_ind()\n");
1419 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs
);
1420 while (i
< sizeoftlvs
)
1421 printk("%02x ", tlvs
[i
++]);
1426 /* tell MPOA about the TLVs we saw */
1427 if (priv
->lane2_ops
&& priv
->lane2_ops
->associate_indicator
) {
1428 priv
->lane2_ops
->associate_indicator(dev
, mac_addr
,
1435 * Here starts what used to lec_arpc.c
1437 * lec_arpc.c was added here when making
1438 * lane client modular. October 1997
1441 #include <linux/types.h>
1442 #include <linux/timer.h>
1443 #include <asm/param.h>
1444 #include <asm/atomic.h>
1445 #include <linux/inetdevice.h>
1446 #include <net/route.h>
1449 #define DPRINTK(format,args...)
1451 #define DPRINTK printk
1454 #define DEBUG_ARP_TABLE 0
1456 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1458 static void lec_arp_check_expire(struct work_struct
*work
);
1459 static void lec_arp_expire_arp(unsigned long data
);
1465 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1468 * Initialization of arp-cache
1470 static void lec_arp_init(struct lec_priv
*priv
)
1474 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
1475 INIT_HLIST_HEAD(&priv
->lec_arp_tables
[i
]);
1477 INIT_HLIST_HEAD(&priv
->lec_arp_empty_ones
);
1478 INIT_HLIST_HEAD(&priv
->lec_no_forward
);
1479 INIT_HLIST_HEAD(&priv
->mcast_fwds
);
1480 spin_lock_init(&priv
->lec_arp_lock
);
1481 INIT_DELAYED_WORK(&priv
->lec_arp_work
, lec_arp_check_expire
);
1482 schedule_delayed_work(&priv
->lec_arp_work
, LEC_ARP_REFRESH_INTERVAL
);
1485 static void lec_arp_clear_vccs(struct lec_arp_table
*entry
)
1488 struct atm_vcc
*vcc
= entry
->vcc
;
1489 struct lec_vcc_priv
*vpriv
= LEC_VCC_PRIV(vcc
);
1490 struct net_device
*dev
= (struct net_device
*)vcc
->proto_data
;
1492 vcc
->pop
= vpriv
->old_pop
;
1494 netif_wake_queue(dev
);
1496 vcc
->user_back
= NULL
;
1497 vcc
->push
= entry
->old_push
;
1498 vcc_release_async(vcc
, -EPIPE
);
1501 if (entry
->recv_vcc
) {
1502 entry
->recv_vcc
->push
= entry
->old_recv_push
;
1503 vcc_release_async(entry
->recv_vcc
, -EPIPE
);
1504 entry
->recv_vcc
= NULL
;
1509 * Insert entry to lec_arp_table
1510 * LANE2: Add to the end of the list to satisfy 8.1.13
1513 lec_arp_add(struct lec_priv
*priv
, struct lec_arp_table
*entry
)
1515 struct hlist_head
*tmp
;
1517 tmp
= &priv
->lec_arp_tables
[HASH(entry
->mac_addr
[ETH_ALEN
- 1])];
1518 hlist_add_head(&entry
->next
, tmp
);
1520 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1521 0xff & entry
->mac_addr
[0], 0xff & entry
->mac_addr
[1],
1522 0xff & entry
->mac_addr
[2], 0xff & entry
->mac_addr
[3],
1523 0xff & entry
->mac_addr
[4], 0xff & entry
->mac_addr
[5]);
1527 * Remove entry from lec_arp_table
1530 lec_arp_remove(struct lec_priv
*priv
, struct lec_arp_table
*to_remove
)
1532 struct hlist_node
*node
;
1533 struct lec_arp_table
*entry
;
1534 int i
, remove_vcc
= 1;
1540 hlist_del(&to_remove
->next
);
1541 del_timer(&to_remove
->timer
);
1543 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1544 if (to_remove
->status
>= ESI_FLUSH_PENDING
) {
1546 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1548 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
1549 hlist_for_each_entry(entry
, node
, &priv
->lec_arp_tables
[i
], next
) {
1550 if (memcmp(to_remove
->atm_addr
,
1551 entry
->atm_addr
, ATM_ESA_LEN
) == 0) {
1558 lec_arp_clear_vccs(to_remove
);
1560 skb_queue_purge(&to_remove
->tx_wait
); /* FIXME: good place for this? */
1562 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1563 0xff & to_remove
->mac_addr
[0], 0xff & to_remove
->mac_addr
[1],
1564 0xff & to_remove
->mac_addr
[2], 0xff & to_remove
->mac_addr
[3],
1565 0xff & to_remove
->mac_addr
[4], 0xff & to_remove
->mac_addr
[5]);
1570 static char *get_status_string(unsigned char st
)
1574 return "ESI_UNKNOWN";
1575 case ESI_ARP_PENDING
:
1576 return "ESI_ARP_PENDING";
1577 case ESI_VC_PENDING
:
1578 return "ESI_VC_PENDING";
1579 case ESI_FLUSH_PENDING
:
1580 return "ESI_FLUSH_PENDING";
1581 case ESI_FORWARD_DIRECT
:
1582 return "ESI_FORWARD_DIRECT";
1588 static void dump_arp_table(struct lec_priv
*priv
)
1590 struct hlist_node
*node
;
1591 struct lec_arp_table
*rulla
;
1595 printk("Dump %p:\n", priv
);
1596 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
1597 hlist_for_each_entry(rulla
, node
, &priv
->lec_arp_tables
[i
], next
) {
1599 offset
+= sprintf(buf
, "%d: %p\n", i
, rulla
);
1600 offset
+= sprintf(buf
+ offset
, "Mac:");
1601 for (j
= 0; j
< ETH_ALEN
; j
++) {
1602 offset
+= sprintf(buf
+ offset
,
1604 rulla
->mac_addr
[j
] & 0xff);
1606 offset
+= sprintf(buf
+ offset
, "Atm:");
1607 for (j
= 0; j
< ATM_ESA_LEN
; j
++) {
1608 offset
+= sprintf(buf
+ offset
,
1610 rulla
->atm_addr
[j
] & 0xff);
1612 offset
+= sprintf(buf
+ offset
,
1613 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1614 rulla
->vcc
? rulla
->vcc
->vpi
: 0,
1615 rulla
->vcc
? rulla
->vcc
->vci
: 0,
1616 rulla
->recv_vcc
? rulla
->recv_vcc
->
1618 rulla
->recv_vcc
? rulla
->recv_vcc
->
1619 vci
: 0, rulla
->last_used
,
1620 rulla
->timestamp
, rulla
->no_tries
);
1622 sprintf(buf
+ offset
,
1623 "Flags:%x, Packets_flooded:%x, Status: %s ",
1624 rulla
->flags
, rulla
->packets_flooded
,
1625 get_status_string(rulla
->status
));
1626 printk("%s\n", buf
);
1630 if (!hlist_empty(&priv
->lec_no_forward
))
1631 printk("No forward\n");
1632 hlist_for_each_entry(rulla
, node
, &priv
->lec_no_forward
, next
) {
1634 offset
+= sprintf(buf
+ offset
, "Mac:");
1635 for (j
= 0; j
< ETH_ALEN
; j
++) {
1636 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1637 rulla
->mac_addr
[j
] & 0xff);
1639 offset
+= sprintf(buf
+ offset
, "Atm:");
1640 for (j
= 0; j
< ATM_ESA_LEN
; j
++) {
1641 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1642 rulla
->atm_addr
[j
] & 0xff);
1644 offset
+= sprintf(buf
+ offset
,
1645 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1646 rulla
->vcc
? rulla
->vcc
->vpi
: 0,
1647 rulla
->vcc
? rulla
->vcc
->vci
: 0,
1648 rulla
->recv_vcc
? rulla
->recv_vcc
->vpi
: 0,
1649 rulla
->recv_vcc
? rulla
->recv_vcc
->vci
: 0,
1651 rulla
->timestamp
, rulla
->no_tries
);
1652 offset
+= sprintf(buf
+ offset
,
1653 "Flags:%x, Packets_flooded:%x, Status: %s ",
1654 rulla
->flags
, rulla
->packets_flooded
,
1655 get_status_string(rulla
->status
));
1656 printk("%s\n", buf
);
1659 if (!hlist_empty(&priv
->lec_arp_empty_ones
))
1660 printk("Empty ones\n");
1661 hlist_for_each_entry(rulla
, node
, &priv
->lec_arp_empty_ones
, next
) {
1663 offset
+= sprintf(buf
+ offset
, "Mac:");
1664 for (j
= 0; j
< ETH_ALEN
; j
++) {
1665 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1666 rulla
->mac_addr
[j
] & 0xff);
1668 offset
+= sprintf(buf
+ offset
, "Atm:");
1669 for (j
= 0; j
< ATM_ESA_LEN
; j
++) {
1670 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1671 rulla
->atm_addr
[j
] & 0xff);
1673 offset
+= sprintf(buf
+ offset
,
1674 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1675 rulla
->vcc
? rulla
->vcc
->vpi
: 0,
1676 rulla
->vcc
? rulla
->vcc
->vci
: 0,
1677 rulla
->recv_vcc
? rulla
->recv_vcc
->vpi
: 0,
1678 rulla
->recv_vcc
? rulla
->recv_vcc
->vci
: 0,
1680 rulla
->timestamp
, rulla
->no_tries
);
1681 offset
+= sprintf(buf
+ offset
,
1682 "Flags:%x, Packets_flooded:%x, Status: %s ",
1683 rulla
->flags
, rulla
->packets_flooded
,
1684 get_status_string(rulla
->status
));
1688 if (!hlist_empty(&priv
->mcast_fwds
))
1689 printk("Multicast Forward VCCs\n");
1690 hlist_for_each_entry(rulla
, node
, &priv
->mcast_fwds
, next
) {
1692 offset
+= sprintf(buf
+ offset
, "Mac:");
1693 for (j
= 0; j
< ETH_ALEN
; j
++) {
1694 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1695 rulla
->mac_addr
[j
] & 0xff);
1697 offset
+= sprintf(buf
+ offset
, "Atm:");
1698 for (j
= 0; j
< ATM_ESA_LEN
; j
++) {
1699 offset
+= sprintf(buf
+ offset
, "%2.2x ",
1700 rulla
->atm_addr
[j
] & 0xff);
1702 offset
+= sprintf(buf
+ offset
,
1703 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1704 rulla
->vcc
? rulla
->vcc
->vpi
: 0,
1705 rulla
->vcc
? rulla
->vcc
->vci
: 0,
1706 rulla
->recv_vcc
? rulla
->recv_vcc
->vpi
: 0,
1707 rulla
->recv_vcc
? rulla
->recv_vcc
->vci
: 0,
1709 rulla
->timestamp
, rulla
->no_tries
);
1710 offset
+= sprintf(buf
+ offset
,
1711 "Flags:%x, Packets_flooded:%x, Status: %s ",
1712 rulla
->flags
, rulla
->packets_flooded
,
1713 get_status_string(rulla
->status
));
1714 printk("%s\n", buf
);
1719 #define dump_arp_table(priv) do { } while (0)
1723 * Destruction of arp-cache
1725 static void lec_arp_destroy(struct lec_priv
*priv
)
1727 unsigned long flags
;
1728 struct hlist_node
*node
, *next
;
1729 struct lec_arp_table
*entry
;
1732 cancel_rearming_delayed_work(&priv
->lec_arp_work
);
1735 * Remove all entries
1738 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
1739 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
1740 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_tables
[i
], next
) {
1741 lec_arp_remove(priv
, entry
);
1744 INIT_HLIST_HEAD(&priv
->lec_arp_tables
[i
]);
1747 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_empty_ones
, next
) {
1748 del_timer_sync(&entry
->timer
);
1749 lec_arp_clear_vccs(entry
);
1750 hlist_del(&entry
->next
);
1753 INIT_HLIST_HEAD(&priv
->lec_arp_empty_ones
);
1755 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_no_forward
, next
) {
1756 del_timer_sync(&entry
->timer
);
1757 lec_arp_clear_vccs(entry
);
1758 hlist_del(&entry
->next
);
1761 INIT_HLIST_HEAD(&priv
->lec_no_forward
);
1763 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->mcast_fwds
, next
) {
1764 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1765 lec_arp_clear_vccs(entry
);
1766 hlist_del(&entry
->next
);
1769 INIT_HLIST_HEAD(&priv
->mcast_fwds
);
1770 priv
->mcast_vcc
= NULL
;
1771 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
1775 * Find entry by mac_address
1777 static struct lec_arp_table
*lec_arp_find(struct lec_priv
*priv
,
1778 unsigned char *mac_addr
)
1780 struct hlist_node
*node
;
1781 struct hlist_head
*head
;
1782 struct lec_arp_table
*entry
;
1784 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1785 mac_addr
[0] & 0xff, mac_addr
[1] & 0xff, mac_addr
[2] & 0xff,
1786 mac_addr
[3] & 0xff, mac_addr
[4] & 0xff, mac_addr
[5] & 0xff);
1788 head
= &priv
->lec_arp_tables
[HASH(mac_addr
[ETH_ALEN
- 1])];
1789 hlist_for_each_entry(entry
, node
, head
, next
) {
1790 if (!compare_ether_addr(mac_addr
, entry
->mac_addr
)) {
1797 static struct lec_arp_table
*make_entry(struct lec_priv
*priv
,
1798 unsigned char *mac_addr
)
1800 struct lec_arp_table
*to_return
;
1802 to_return
= kzalloc(sizeof(struct lec_arp_table
), GFP_ATOMIC
);
1804 printk("LEC: Arp entry kmalloc failed\n");
1807 memcpy(to_return
->mac_addr
, mac_addr
, ETH_ALEN
);
1808 INIT_HLIST_NODE(&to_return
->next
);
1809 init_timer(&to_return
->timer
);
1810 to_return
->timer
.function
= lec_arp_expire_arp
;
1811 to_return
->timer
.data
= (unsigned long)to_return
;
1812 to_return
->last_used
= jiffies
;
1813 to_return
->priv
= priv
;
1814 skb_queue_head_init(&to_return
->tx_wait
);
1815 atomic_set(&to_return
->usage
, 1);
1819 /* Arp sent timer expired */
1820 static void lec_arp_expire_arp(unsigned long data
)
1822 struct lec_arp_table
*entry
;
1824 entry
= (struct lec_arp_table
*)data
;
1826 DPRINTK("lec_arp_expire_arp\n");
1827 if (entry
->status
== ESI_ARP_PENDING
) {
1828 if (entry
->no_tries
<= entry
->priv
->max_retry_count
) {
1829 if (entry
->is_rdesc
)
1830 send_to_lecd(entry
->priv
, l_rdesc_arp_xmt
,
1831 entry
->mac_addr
, NULL
, NULL
);
1833 send_to_lecd(entry
->priv
, l_arp_xmt
,
1834 entry
->mac_addr
, NULL
, NULL
);
1837 mod_timer(&entry
->timer
, jiffies
+ (1 * HZ
));
1841 /* Unknown/unused vcc expire, remove associated entry */
1842 static void lec_arp_expire_vcc(unsigned long data
)
1844 unsigned long flags
;
1845 struct lec_arp_table
*to_remove
= (struct lec_arp_table
*)data
;
1846 struct lec_priv
*priv
= (struct lec_priv
*)to_remove
->priv
;
1848 del_timer(&to_remove
->timer
);
1850 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1852 to_remove
->vcc
? to_remove
->recv_vcc
->vpi
: 0,
1853 to_remove
->vcc
? to_remove
->recv_vcc
->vci
: 0);
1855 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
1856 hlist_del(&to_remove
->next
);
1857 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
1859 lec_arp_clear_vccs(to_remove
);
1860 lec_arp_put(to_remove
);
1866 * 2. For each entry, delete entries that have aged past the age limit.
1867 * 3. For each entry, depending on the status of the entry, perform
1868 * the following maintenance.
1869 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1870 * tick_count is above the max_unknown_frame_time, clear
1871 * the tick_count to zero and clear the packets_flooded counter
1872 * to zero. This supports the packet rate limit per address
1873 * while flooding unknowns.
1874 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1875 * than or equal to the path_switching_delay, change the status
1876 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1877 * regardless of the progress of the flush protocol.
1879 static void lec_arp_check_expire(struct work_struct
*work
)
1881 unsigned long flags
;
1882 struct lec_priv
*priv
=
1883 container_of(work
, struct lec_priv
, lec_arp_work
.work
);
1884 struct hlist_node
*node
, *next
;
1885 struct lec_arp_table
*entry
;
1887 unsigned long time_to_check
;
1890 DPRINTK("lec_arp_check_expire %p\n", priv
);
1893 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
1894 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
1895 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_tables
[i
], next
) {
1896 if ((entry
->flags
) & LEC_REMOTE_FLAG
&&
1897 priv
->topology_change
)
1898 time_to_check
= priv
->forward_delay_time
;
1900 time_to_check
= priv
->aging_time
;
1902 DPRINTK("About to expire: %lx - %lx > %lx\n",
1903 now
, entry
->last_used
, time_to_check
);
1904 if (time_after(now
, entry
->last_used
+ time_to_check
)
1905 && !(entry
->flags
& LEC_PERMANENT_FLAG
)
1906 && !(entry
->mac_addr
[0] & 0x01)) { /* LANE2: 7.1.20 */
1908 DPRINTK("LEC:Entry timed out\n");
1909 lec_arp_remove(priv
, entry
);
1912 /* Something else */
1913 if ((entry
->status
== ESI_VC_PENDING
||
1914 entry
->status
== ESI_ARP_PENDING
)
1915 && time_after_eq(now
,
1918 max_unknown_frame_time
)) {
1919 entry
->timestamp
= jiffies
;
1920 entry
->packets_flooded
= 0;
1921 if (entry
->status
== ESI_VC_PENDING
)
1922 send_to_lecd(priv
, l_svc_setup
,
1927 if (entry
->status
== ESI_FLUSH_PENDING
1929 time_after_eq(now
, entry
->timestamp
+
1930 priv
->path_switching_delay
)) {
1931 struct sk_buff
*skb
;
1932 struct atm_vcc
*vcc
= entry
->vcc
;
1934 lec_arp_hold(entry
);
1935 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
1936 while ((skb
= skb_dequeue(&entry
->tx_wait
)) != NULL
)
1937 lec_send(vcc
, skb
, entry
->priv
);
1938 entry
->last_used
= jiffies
;
1939 entry
->status
= ESI_FORWARD_DIRECT
;
1946 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
1948 schedule_delayed_work(&priv
->lec_arp_work
, LEC_ARP_REFRESH_INTERVAL
);
1952 * Try to find vcc where mac_address is attached.
1955 static struct atm_vcc
*lec_arp_resolve(struct lec_priv
*priv
,
1956 unsigned char *mac_to_find
, int is_rdesc
,
1957 struct lec_arp_table
**ret_entry
)
1959 unsigned long flags
;
1960 struct lec_arp_table
*entry
;
1961 struct atm_vcc
*found
;
1963 if (mac_to_find
[0] & 0x01) {
1964 switch (priv
->lane_version
) {
1966 return priv
->mcast_vcc
;
1968 case 2: /* LANE2 wants arp for multicast addresses */
1969 if (!compare_ether_addr(mac_to_find
, bus_mac
))
1970 return priv
->mcast_vcc
;
1977 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
1978 entry
= lec_arp_find(priv
, mac_to_find
);
1981 if (entry
->status
== ESI_FORWARD_DIRECT
) {
1983 entry
->last_used
= jiffies
;
1984 lec_arp_hold(entry
);
1990 * If the LE_ARP cache entry is still pending, reset count to 0
1991 * so another LE_ARP request can be made for this frame.
1993 if (entry
->status
== ESI_ARP_PENDING
) {
1994 entry
->no_tries
= 0;
1997 * Data direct VC not yet set up, check to see if the unknown
1998 * frame count is greater than the limit. If the limit has
1999 * not been reached, allow the caller to send packet to
2002 if (entry
->status
!= ESI_FLUSH_PENDING
&&
2003 entry
->packets_flooded
<
2004 priv
->maximum_unknown_frame_count
) {
2005 entry
->packets_flooded
++;
2006 DPRINTK("LEC_ARP: Flooding..\n");
2007 found
= priv
->mcast_vcc
;
2011 * We got here because entry->status == ESI_FLUSH_PENDING
2012 * or BUS flood limit was reached for an entry which is
2013 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2015 lec_arp_hold(entry
);
2017 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry
->status
,
2021 /* No matching entry was found */
2022 entry
= make_entry(priv
, mac_to_find
);
2023 DPRINTK("LEC_ARP: Making entry\n");
2025 found
= priv
->mcast_vcc
;
2028 lec_arp_add(priv
, entry
);
2029 /* We want arp-request(s) to be sent */
2030 entry
->packets_flooded
= 1;
2031 entry
->status
= ESI_ARP_PENDING
;
2032 entry
->no_tries
= 1;
2033 entry
->last_used
= entry
->timestamp
= jiffies
;
2034 entry
->is_rdesc
= is_rdesc
;
2035 if (entry
->is_rdesc
)
2036 send_to_lecd(priv
, l_rdesc_arp_xmt
, mac_to_find
, NULL
,
2039 send_to_lecd(priv
, l_arp_xmt
, mac_to_find
, NULL
, NULL
);
2040 entry
->timer
.expires
= jiffies
+ (1 * HZ
);
2041 entry
->timer
.function
= lec_arp_expire_arp
;
2042 add_timer(&entry
->timer
);
2043 found
= priv
->mcast_vcc
;
2047 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2052 lec_addr_delete(struct lec_priv
*priv
, unsigned char *atm_addr
,
2053 unsigned long permanent
)
2055 unsigned long flags
;
2056 struct hlist_node
*node
, *next
;
2057 struct lec_arp_table
*entry
;
2060 DPRINTK("lec_addr_delete\n");
2061 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2062 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
2063 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_tables
[i
], next
) {
2064 if (!memcmp(atm_addr
, entry
->atm_addr
, ATM_ESA_LEN
)
2066 !(entry
->flags
& LEC_PERMANENT_FLAG
))) {
2067 lec_arp_remove(priv
, entry
);
2070 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2074 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2079 * Notifies: Response to arp_request (atm_addr != NULL)
2082 lec_arp_update(struct lec_priv
*priv
, unsigned char *mac_addr
,
2083 unsigned char *atm_addr
, unsigned long remoteflag
,
2084 unsigned int targetless_le_arp
)
2086 unsigned long flags
;
2087 struct hlist_node
*node
, *next
;
2088 struct lec_arp_table
*entry
, *tmp
;
2091 DPRINTK("lec:%s", (targetless_le_arp
) ? "targetless " : " ");
2092 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2093 mac_addr
[0], mac_addr
[1], mac_addr
[2], mac_addr
[3],
2094 mac_addr
[4], mac_addr
[5]);
2096 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2097 entry
= lec_arp_find(priv
, mac_addr
);
2098 if (entry
== NULL
&& targetless_le_arp
)
2100 * LANE2: ignore targetless LE_ARPs for which
2101 * we have no entry in the cache. 7.1.30
2103 if (!hlist_empty(&priv
->lec_arp_empty_ones
)) {
2104 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_empty_ones
, next
) {
2105 if (memcmp(entry
->atm_addr
, atm_addr
, ATM_ESA_LEN
) == 0) {
2106 hlist_del(&entry
->next
);
2107 del_timer(&entry
->timer
);
2108 tmp
= lec_arp_find(priv
, mac_addr
);
2110 del_timer(&tmp
->timer
);
2111 tmp
->status
= ESI_FORWARD_DIRECT
;
2112 memcpy(tmp
->atm_addr
, atm_addr
, ATM_ESA_LEN
);
2113 tmp
->vcc
= entry
->vcc
;
2114 tmp
->old_push
= entry
->old_push
;
2115 tmp
->last_used
= jiffies
;
2116 del_timer(&entry
->timer
);
2120 entry
->status
= ESI_FORWARD_DIRECT
;
2121 memcpy(entry
->mac_addr
, mac_addr
, ETH_ALEN
);
2122 entry
->last_used
= jiffies
;
2123 lec_arp_add(priv
, entry
);
2126 entry
->flags
|= LEC_REMOTE_FLAG
;
2128 entry
->flags
&= ~LEC_REMOTE_FLAG
;
2129 DPRINTK("After update\n");
2130 dump_arp_table(priv
);
2136 entry
= lec_arp_find(priv
, mac_addr
);
2138 entry
= make_entry(priv
, mac_addr
);
2141 entry
->status
= ESI_UNKNOWN
;
2142 lec_arp_add(priv
, entry
);
2143 /* Temporary, changes before end of function */
2145 memcpy(entry
->atm_addr
, atm_addr
, ATM_ESA_LEN
);
2146 del_timer(&entry
->timer
);
2147 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
2148 hlist_for_each_entry(tmp
, node
, &priv
->lec_arp_tables
[i
], next
) {
2150 !memcmp(tmp
->atm_addr
, atm_addr
, ATM_ESA_LEN
)) {
2151 /* Vcc to this host exists */
2152 if (tmp
->status
> ESI_VC_PENDING
) {
2154 * ESI_FLUSH_PENDING,
2155 * ESI_FORWARD_DIRECT
2157 entry
->vcc
= tmp
->vcc
;
2158 entry
->old_push
= tmp
->old_push
;
2160 entry
->status
= tmp
->status
;
2166 entry
->flags
|= LEC_REMOTE_FLAG
;
2168 entry
->flags
&= ~LEC_REMOTE_FLAG
;
2169 if (entry
->status
== ESI_ARP_PENDING
|| entry
->status
== ESI_UNKNOWN
) {
2170 entry
->status
= ESI_VC_PENDING
;
2171 send_to_lecd(priv
, l_svc_setup
, entry
->mac_addr
, atm_addr
, NULL
);
2173 DPRINTK("After update2\n");
2174 dump_arp_table(priv
);
2176 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2180 * Notifies: Vcc setup ready
2183 lec_vcc_added(struct lec_priv
*priv
, struct atmlec_ioc
*ioc_data
,
2184 struct atm_vcc
*vcc
,
2185 void (*old_push
) (struct atm_vcc
*vcc
, struct sk_buff
*skb
))
2187 unsigned long flags
;
2188 struct hlist_node
*node
;
2189 struct lec_arp_table
*entry
;
2190 int i
, found_entry
= 0;
2192 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2193 if (ioc_data
->receive
== 2) {
2194 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2196 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2198 entry
= lec_arp_find(priv
, bus_mac
);
2200 printk("LEC_ARP: Multicast entry not found!\n");
2203 memcpy(entry
->atm_addr
, ioc_data
->atm_addr
, ATM_ESA_LEN
);
2204 entry
->recv_vcc
= vcc
;
2205 entry
->old_recv_push
= old_push
;
2207 entry
= make_entry(priv
, bus_mac
);
2210 del_timer(&entry
->timer
);
2211 memcpy(entry
->atm_addr
, ioc_data
->atm_addr
, ATM_ESA_LEN
);
2212 entry
->recv_vcc
= vcc
;
2213 entry
->old_recv_push
= old_push
;
2214 hlist_add_head(&entry
->next
, &priv
->mcast_fwds
);
2216 } else if (ioc_data
->receive
== 1) {
2218 * Vcc which we don't want to make default vcc,
2222 ("LEC_ARP:Attaching data direct, not default: "
2223 "%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",
2224 ioc_data
->atm_addr
[0], ioc_data
->atm_addr
[1],
2225 ioc_data
->atm_addr
[2], ioc_data
->atm_addr
[3],
2226 ioc_data
->atm_addr
[4], ioc_data
->atm_addr
[5],
2227 ioc_data
->atm_addr
[6], ioc_data
->atm_addr
[7],
2228 ioc_data
->atm_addr
[8], ioc_data
->atm_addr
[9],
2229 ioc_data
->atm_addr
[10], ioc_data
->atm_addr
[11],
2230 ioc_data
->atm_addr
[12], ioc_data
->atm_addr
[13],
2231 ioc_data
->atm_addr
[14], ioc_data
->atm_addr
[15],
2232 ioc_data
->atm_addr
[16], ioc_data
->atm_addr
[17],
2233 ioc_data
->atm_addr
[18], ioc_data
->atm_addr
[19]);
2234 entry
= make_entry(priv
, bus_mac
);
2237 memcpy(entry
->atm_addr
, ioc_data
->atm_addr
, ATM_ESA_LEN
);
2238 memset(entry
->mac_addr
, 0, ETH_ALEN
);
2239 entry
->recv_vcc
= vcc
;
2240 entry
->old_recv_push
= old_push
;
2241 entry
->status
= ESI_UNKNOWN
;
2242 entry
->timer
.expires
= jiffies
+ priv
->vcc_timeout_period
;
2243 entry
->timer
.function
= lec_arp_expire_vcc
;
2244 hlist_add_head(&entry
->next
, &priv
->lec_no_forward
);
2245 add_timer(&entry
->timer
);
2246 dump_arp_table(priv
);
2250 ("LEC_ARP:Attaching data direct, default: "
2251 "%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",
2252 ioc_data
->atm_addr
[0], ioc_data
->atm_addr
[1],
2253 ioc_data
->atm_addr
[2], ioc_data
->atm_addr
[3],
2254 ioc_data
->atm_addr
[4], ioc_data
->atm_addr
[5],
2255 ioc_data
->atm_addr
[6], ioc_data
->atm_addr
[7],
2256 ioc_data
->atm_addr
[8], ioc_data
->atm_addr
[9],
2257 ioc_data
->atm_addr
[10], ioc_data
->atm_addr
[11],
2258 ioc_data
->atm_addr
[12], ioc_data
->atm_addr
[13],
2259 ioc_data
->atm_addr
[14], ioc_data
->atm_addr
[15],
2260 ioc_data
->atm_addr
[16], ioc_data
->atm_addr
[17],
2261 ioc_data
->atm_addr
[18], ioc_data
->atm_addr
[19]);
2262 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
2263 hlist_for_each_entry(entry
, node
, &priv
->lec_arp_tables
[i
], next
) {
2265 (ioc_data
->atm_addr
, entry
->atm_addr
,
2266 ATM_ESA_LEN
) == 0) {
2267 DPRINTK("LEC_ARP: Attaching data direct\n");
2268 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2269 entry
->vcc
? entry
->vcc
->vci
: 0,
2270 entry
->recv_vcc
? entry
->recv_vcc
->
2273 del_timer(&entry
->timer
);
2275 entry
->old_push
= old_push
;
2276 if (entry
->status
== ESI_VC_PENDING
) {
2277 if (priv
->maximum_unknown_frame_count
2282 entry
->timestamp
= jiffies
;
2286 send_to_lecd(priv
, l_flush_xmt
,
2294 * They were forming a connection
2295 * to us, and we to them. Our
2296 * ATM address is numerically lower
2297 * than theirs, so we make connection
2298 * we formed into default VCC (8.1.11).
2299 * Connection they made gets torn
2300 * down. This might confuse some
2301 * clients. Can be changed if
2302 * someone reports trouble...
2310 DPRINTK("After vcc was added\n");
2311 dump_arp_table(priv
);
2315 * Not found, snatch address from first data packet that arrives
2318 entry
= make_entry(priv
, bus_mac
);
2322 entry
->old_push
= old_push
;
2323 memcpy(entry
->atm_addr
, ioc_data
->atm_addr
, ATM_ESA_LEN
);
2324 memset(entry
->mac_addr
, 0, ETH_ALEN
);
2325 entry
->status
= ESI_UNKNOWN
;
2326 hlist_add_head(&entry
->next
, &priv
->lec_arp_empty_ones
);
2327 entry
->timer
.expires
= jiffies
+ priv
->vcc_timeout_period
;
2328 entry
->timer
.function
= lec_arp_expire_vcc
;
2329 add_timer(&entry
->timer
);
2330 DPRINTK("After vcc was added\n");
2331 dump_arp_table(priv
);
2333 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2336 static void lec_flush_complete(struct lec_priv
*priv
, unsigned long tran_id
)
2338 unsigned long flags
;
2339 struct hlist_node
*node
;
2340 struct lec_arp_table
*entry
;
2343 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id
);
2345 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2346 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
2347 hlist_for_each_entry(entry
, node
, &priv
->lec_arp_tables
[i
], next
) {
2348 if (entry
->flush_tran_id
== tran_id
2349 && entry
->status
== ESI_FLUSH_PENDING
) {
2350 struct sk_buff
*skb
;
2351 struct atm_vcc
*vcc
= entry
->vcc
;
2353 lec_arp_hold(entry
);
2354 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2355 while ((skb
= skb_dequeue(&entry
->tx_wait
)) != NULL
)
2356 lec_send(vcc
, skb
, entry
->priv
);
2357 entry
->last_used
= jiffies
;
2358 entry
->status
= ESI_FORWARD_DIRECT
;
2360 DPRINTK("LEC_ARP: Flushed\n");
2365 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2366 dump_arp_table(priv
);
2370 lec_set_flush_tran_id(struct lec_priv
*priv
,
2371 unsigned char *atm_addr
, unsigned long tran_id
)
2373 unsigned long flags
;
2374 struct hlist_node
*node
;
2375 struct lec_arp_table
*entry
;
2378 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2379 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++)
2380 hlist_for_each_entry(entry
, node
, &priv
->lec_arp_tables
[i
], next
) {
2381 if (!memcmp(atm_addr
, entry
->atm_addr
, ATM_ESA_LEN
)) {
2382 entry
->flush_tran_id
= tran_id
;
2383 DPRINTK("Set flush transaction id to %lx for %p\n",
2387 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2390 static int lec_mcast_make(struct lec_priv
*priv
, struct atm_vcc
*vcc
)
2392 unsigned long flags
;
2393 unsigned char mac_addr
[] = {
2394 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2396 struct lec_arp_table
*to_add
;
2397 struct lec_vcc_priv
*vpriv
;
2400 if (!(vpriv
= kmalloc(sizeof(struct lec_vcc_priv
), GFP_KERNEL
)))
2403 vpriv
->old_pop
= vcc
->pop
;
2404 vcc
->user_back
= vpriv
;
2406 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2407 to_add
= make_entry(priv
, mac_addr
);
2409 vcc
->pop
= vpriv
->old_pop
;
2414 memcpy(to_add
->atm_addr
, vcc
->remote
.sas_addr
.prv
, ATM_ESA_LEN
);
2415 to_add
->status
= ESI_FORWARD_DIRECT
;
2416 to_add
->flags
|= LEC_PERMANENT_FLAG
;
2418 to_add
->old_push
= vcc
->push
;
2419 vcc
->push
= lec_push
;
2420 priv
->mcast_vcc
= vcc
;
2421 lec_arp_add(priv
, to_add
);
2423 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2427 static void lec_vcc_close(struct lec_priv
*priv
, struct atm_vcc
*vcc
)
2429 unsigned long flags
;
2430 struct hlist_node
*node
, *next
;
2431 struct lec_arp_table
*entry
;
2434 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc
->vpi
, vcc
->vci
);
2435 dump_arp_table(priv
);
2437 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2439 for (i
= 0; i
< LEC_ARP_TABLE_SIZE
; i
++) {
2440 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_tables
[i
], next
) {
2441 if (vcc
== entry
->vcc
) {
2442 lec_arp_remove(priv
, entry
);
2444 if (priv
->mcast_vcc
== vcc
) {
2445 priv
->mcast_vcc
= NULL
;
2451 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_empty_ones
, next
) {
2452 if (entry
->vcc
== vcc
) {
2453 lec_arp_clear_vccs(entry
);
2454 del_timer(&entry
->timer
);
2455 hlist_del(&entry
->next
);
2460 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_no_forward
, next
) {
2461 if (entry
->recv_vcc
== vcc
) {
2462 lec_arp_clear_vccs(entry
);
2463 del_timer(&entry
->timer
);
2464 hlist_del(&entry
->next
);
2469 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->mcast_fwds
, next
) {
2470 if (entry
->recv_vcc
== vcc
) {
2471 lec_arp_clear_vccs(entry
);
2472 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2473 hlist_del(&entry
->next
);
2478 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2479 dump_arp_table(priv
);
2483 lec_arp_check_empties(struct lec_priv
*priv
,
2484 struct atm_vcc
*vcc
, struct sk_buff
*skb
)
2486 unsigned long flags
;
2487 struct hlist_node
*node
, *next
;
2488 struct lec_arp_table
*entry
, *tmp
;
2489 struct lecdatahdr_8023
*hdr
= (struct lecdatahdr_8023
*)skb
->data
;
2492 struct lecdatahdr_8025
*tr_hdr
= (struct lecdatahdr_8025
*)skb
->data
;
2495 src
= tr_hdr
->h_source
;
2498 src
= hdr
->h_source
;
2500 spin_lock_irqsave(&priv
->lec_arp_lock
, flags
);
2501 hlist_for_each_entry_safe(entry
, node
, next
, &priv
->lec_arp_empty_ones
, next
) {
2502 if (vcc
== entry
->vcc
) {
2503 del_timer(&entry
->timer
);
2504 memcpy(entry
->mac_addr
, src
, ETH_ALEN
);
2505 entry
->status
= ESI_FORWARD_DIRECT
;
2506 entry
->last_used
= jiffies
;
2507 /* We might have got an entry */
2508 if ((tmp
= lec_arp_find(priv
, src
))) {
2509 lec_arp_remove(priv
, tmp
);
2512 hlist_del(&entry
->next
);
2513 lec_arp_add(priv
, entry
);
2517 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2519 spin_unlock_irqrestore(&priv
->lec_arp_lock
, flags
);
2522 MODULE_LICENSE("GPL");