Merge branch 'batman-adv/next' of git://git.open-mesh.org/ecsv/linux-merge
[linux-3.10.git] / net / batman-adv / soft-interface.c
1 /*
2  * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
3  *
4  * Marek Lindner, Simon Wunderlich
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of version 2 of the GNU General Public
8  * License as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18  * 02110-1301, USA
19  *
20  */
21
22 #include "main.h"
23 #include "soft-interface.h"
24 #include "hard-interface.h"
25 #include "routing.h"
26 #include "send.h"
27 #include "bat_debugfs.h"
28 #include "translation-table.h"
29 #include "hash.h"
30 #include "gateway_common.h"
31 #include "gateway_client.h"
32 #include "bat_sysfs.h"
33 #include <linux/slab.h>
34 #include <linux/ethtool.h>
35 #include <linux/etherdevice.h>
36 #include <linux/if_vlan.h>
37 #include "unicast.h"
38
39
40 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
41 static void bat_get_drvinfo(struct net_device *dev,
42                             struct ethtool_drvinfo *info);
43 static u32 bat_get_msglevel(struct net_device *dev);
44 static void bat_set_msglevel(struct net_device *dev, u32 value);
45 static u32 bat_get_link(struct net_device *dev);
46 static u32 bat_get_rx_csum(struct net_device *dev);
47 static int bat_set_rx_csum(struct net_device *dev, u32 data);
48
49 static const struct ethtool_ops bat_ethtool_ops = {
50         .get_settings = bat_get_settings,
51         .get_drvinfo = bat_get_drvinfo,
52         .get_msglevel = bat_get_msglevel,
53         .set_msglevel = bat_set_msglevel,
54         .get_link = bat_get_link,
55         .get_rx_csum = bat_get_rx_csum,
56         .set_rx_csum = bat_set_rx_csum
57 };
58
59 int my_skb_head_push(struct sk_buff *skb, unsigned int len)
60 {
61         int result;
62
63         /**
64          * TODO: We must check if we can release all references to non-payload
65          * data using skb_header_release in our skbs to allow skb_cow_header to
66          * work optimally. This means that those skbs are not allowed to read
67          * or write any data which is before the current position of skb->data
68          * after that call and thus allow other skbs with the same data buffer
69          * to write freely in that area.
70          */
71         result = skb_cow_head(skb, len);
72         if (result < 0)
73                 return result;
74
75         skb_push(skb, len);
76         return 0;
77 }
78
79 static void softif_neigh_free_rcu(struct rcu_head *rcu)
80 {
81         struct softif_neigh *softif_neigh;
82
83         softif_neigh = container_of(rcu, struct softif_neigh, rcu);
84         kfree(softif_neigh);
85 }
86
87 static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
88 {
89         if (atomic_dec_and_test(&softif_neigh->refcount))
90                 call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
91 }
92
93 void softif_neigh_purge(struct bat_priv *bat_priv)
94 {
95         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
96         struct hlist_node *node, *node_tmp;
97
98         spin_lock_bh(&bat_priv->softif_neigh_lock);
99
100         hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
101                                   &bat_priv->softif_neigh_list, list) {
102
103                 if ((!time_after(jiffies, softif_neigh->last_seen +
104                                 msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
105                     (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
106                         continue;
107
108                 hlist_del_rcu(&softif_neigh->list);
109
110                 if (bat_priv->softif_neigh == softif_neigh) {
111                         bat_dbg(DBG_ROUTES, bat_priv,
112                                  "Current mesh exit point '%pM' vanished "
113                                  "(vid: %d).\n",
114                                  softif_neigh->addr, softif_neigh->vid);
115                         softif_neigh_tmp = bat_priv->softif_neigh;
116                         bat_priv->softif_neigh = NULL;
117                         softif_neigh_free_ref(softif_neigh_tmp);
118                 }
119
120                 softif_neigh_free_ref(softif_neigh);
121         }
122
123         spin_unlock_bh(&bat_priv->softif_neigh_lock);
124 }
125
126 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
127                                              uint8_t *addr, short vid)
128 {
129         struct softif_neigh *softif_neigh;
130         struct hlist_node *node;
131
132         rcu_read_lock();
133         hlist_for_each_entry_rcu(softif_neigh, node,
134                                  &bat_priv->softif_neigh_list, list) {
135                 if (!compare_eth(softif_neigh->addr, addr))
136                         continue;
137
138                 if (softif_neigh->vid != vid)
139                         continue;
140
141                 if (!atomic_inc_not_zero(&softif_neigh->refcount))
142                         continue;
143
144                 softif_neigh->last_seen = jiffies;
145                 goto out;
146         }
147
148         softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
149         if (!softif_neigh)
150                 goto out;
151
152         memcpy(softif_neigh->addr, addr, ETH_ALEN);
153         softif_neigh->vid = vid;
154         softif_neigh->last_seen = jiffies;
155         /* initialize with 2 - caller decrements counter by one */
156         atomic_set(&softif_neigh->refcount, 2);
157
158         INIT_HLIST_NODE(&softif_neigh->list);
159         spin_lock_bh(&bat_priv->softif_neigh_lock);
160         hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
161         spin_unlock_bh(&bat_priv->softif_neigh_lock);
162
163 out:
164         rcu_read_unlock();
165         return softif_neigh;
166 }
167
168 int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
169 {
170         struct net_device *net_dev = (struct net_device *)seq->private;
171         struct bat_priv *bat_priv = netdev_priv(net_dev);
172         struct softif_neigh *softif_neigh;
173         struct hlist_node *node;
174
175         if (!bat_priv->primary_if) {
176                 return seq_printf(seq, "BATMAN mesh %s disabled - "
177                                "please specify interfaces to enable it\n",
178                                net_dev->name);
179         }
180
181         seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
182
183         rcu_read_lock();
184         hlist_for_each_entry_rcu(softif_neigh, node,
185                                  &bat_priv->softif_neigh_list, list)
186                 seq_printf(seq, "%s %pM (vid: %d)\n",
187                                 bat_priv->softif_neigh == softif_neigh
188                                 ? "=>" : "  ", softif_neigh->addr,
189                                 softif_neigh->vid);
190         rcu_read_unlock();
191
192         return 0;
193 }
194
195 static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
196                                short vid)
197 {
198         struct bat_priv *bat_priv = netdev_priv(dev);
199         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
200         struct batman_packet *batman_packet;
201         struct softif_neigh *softif_neigh, *softif_neigh_tmp;
202
203         if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
204                 batman_packet = (struct batman_packet *)
205                                         (skb->data + ETH_HLEN + VLAN_HLEN);
206         else
207                 batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
208
209         if (batman_packet->version != COMPAT_VERSION)
210                 goto err;
211
212         if (batman_packet->packet_type != BAT_PACKET)
213                 goto err;
214
215         if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
216                 goto err;
217
218         if (is_my_mac(batman_packet->orig))
219                 goto err;
220
221         softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
222
223         if (!softif_neigh)
224                 goto err;
225
226         if (bat_priv->softif_neigh == softif_neigh)
227                 goto out;
228
229         /* we got a neighbor but its mac is 'bigger' than ours  */
230         if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
231                    softif_neigh->addr, ETH_ALEN) < 0)
232                 goto out;
233
234         /* switch to new 'smallest neighbor' */
235         if ((bat_priv->softif_neigh) &&
236             (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
237                                                         ETH_ALEN) < 0)) {
238                 bat_dbg(DBG_ROUTES, bat_priv,
239                         "Changing mesh exit point from %pM (vid: %d) "
240                         "to %pM (vid: %d).\n",
241                          bat_priv->softif_neigh->addr,
242                          bat_priv->softif_neigh->vid,
243                          softif_neigh->addr, softif_neigh->vid);
244                 softif_neigh_tmp = bat_priv->softif_neigh;
245                 bat_priv->softif_neigh = softif_neigh;
246                 softif_neigh_free_ref(softif_neigh_tmp);
247                 /* we need to hold the additional reference */
248                 goto err;
249         }
250
251         /* close own batX device and use softif_neigh as exit node */
252         if ((!bat_priv->softif_neigh) &&
253             (memcmp(softif_neigh->addr,
254                     bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
255                 bat_dbg(DBG_ROUTES, bat_priv,
256                         "Setting mesh exit point to %pM (vid: %d).\n",
257                         softif_neigh->addr, softif_neigh->vid);
258                 bat_priv->softif_neigh = softif_neigh;
259                 /* we need to hold the additional reference */
260                 goto err;
261         }
262
263 out:
264         softif_neigh_free_ref(softif_neigh);
265 err:
266         kfree_skb(skb);
267         return;
268 }
269
270 static int interface_open(struct net_device *dev)
271 {
272         netif_start_queue(dev);
273         return 0;
274 }
275
276 static int interface_release(struct net_device *dev)
277 {
278         netif_stop_queue(dev);
279         return 0;
280 }
281
282 static struct net_device_stats *interface_stats(struct net_device *dev)
283 {
284         struct bat_priv *bat_priv = netdev_priv(dev);
285         return &bat_priv->stats;
286 }
287
288 static int interface_set_mac_addr(struct net_device *dev, void *p)
289 {
290         struct bat_priv *bat_priv = netdev_priv(dev);
291         struct sockaddr *addr = p;
292
293         if (!is_valid_ether_addr(addr->sa_data))
294                 return -EADDRNOTAVAIL;
295
296         /* only modify hna-table if it has been initialised before */
297         if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
298                 hna_local_remove(bat_priv, dev->dev_addr,
299                                  "mac address changed");
300                 hna_local_add(dev, addr->sa_data);
301         }
302
303         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
304         return 0;
305 }
306
307 static int interface_change_mtu(struct net_device *dev, int new_mtu)
308 {
309         /* check ranges */
310         if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
311                 return -EINVAL;
312
313         dev->mtu = new_mtu;
314
315         return 0;
316 }
317
318 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
319 {
320         struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
321         struct bat_priv *bat_priv = netdev_priv(soft_iface);
322         struct bcast_packet *bcast_packet;
323         struct vlan_ethhdr *vhdr;
324         int data_len = skb->len, ret;
325         short vid = -1;
326         bool do_bcast = false;
327
328         if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
329                 goto dropped;
330
331         soft_iface->trans_start = jiffies;
332
333         switch (ntohs(ethhdr->h_proto)) {
334         case ETH_P_8021Q:
335                 vhdr = (struct vlan_ethhdr *)skb->data;
336                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
337
338                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
339                         break;
340
341                 /* fall through */
342         case ETH_P_BATMAN:
343                 softif_batman_recv(skb, soft_iface, vid);
344                 goto end;
345         }
346
347         /**
348          * if we have a another chosen mesh exit node in range
349          * it will transport the packets to the mesh
350          */
351         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
352                 goto dropped;
353
354         /* TODO: check this for locks */
355         hna_local_add(soft_iface, ethhdr->h_source);
356
357         if (is_multicast_ether_addr(ethhdr->h_dest)) {
358                 ret = gw_is_target(bat_priv, skb);
359
360                 if (ret < 0)
361                         goto dropped;
362
363                 if (ret == 0)
364                         do_bcast = true;
365         }
366
367         /* ethernet packet should be broadcasted */
368         if (do_bcast) {
369                 if (!bat_priv->primary_if)
370                         goto dropped;
371
372                 if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
373                         goto dropped;
374
375                 bcast_packet = (struct bcast_packet *)skb->data;
376                 bcast_packet->version = COMPAT_VERSION;
377                 bcast_packet->ttl = TTL;
378
379                 /* batman packet type: broadcast */
380                 bcast_packet->packet_type = BAT_BCAST;
381
382                 /* hw address of first interface is the orig mac because only
383                  * this mac is known throughout the mesh */
384                 memcpy(bcast_packet->orig,
385                        bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
386
387                 /* set broadcast sequence number */
388                 bcast_packet->seqno =
389                         htonl(atomic_inc_return(&bat_priv->bcast_seqno));
390
391                 add_bcast_packet_to_list(bat_priv, skb);
392
393                 /* a copy is stored in the bcast list, therefore removing
394                  * the original skb. */
395                 kfree_skb(skb);
396
397         /* unicast packet */
398         } else {
399                 ret = unicast_send_skb(skb, bat_priv);
400                 if (ret != 0)
401                         goto dropped_freed;
402         }
403
404         bat_priv->stats.tx_packets++;
405         bat_priv->stats.tx_bytes += data_len;
406         goto end;
407
408 dropped:
409         kfree_skb(skb);
410 dropped_freed:
411         bat_priv->stats.tx_dropped++;
412 end:
413         return NETDEV_TX_OK;
414 }
415
416 void interface_rx(struct net_device *soft_iface,
417                   struct sk_buff *skb, struct hard_iface *recv_if,
418                   int hdr_size)
419 {
420         struct bat_priv *bat_priv = netdev_priv(soft_iface);
421         struct unicast_packet *unicast_packet;
422         struct ethhdr *ethhdr;
423         struct vlan_ethhdr *vhdr;
424         short vid = -1;
425         int ret;
426
427         /* check if enough space is available for pulling, and pull */
428         if (!pskb_may_pull(skb, hdr_size))
429                 goto dropped;
430
431         skb_pull_rcsum(skb, hdr_size);
432         skb_reset_mac_header(skb);
433
434         ethhdr = (struct ethhdr *)skb_mac_header(skb);
435
436         switch (ntohs(ethhdr->h_proto)) {
437         case ETH_P_8021Q:
438                 vhdr = (struct vlan_ethhdr *)skb->data;
439                 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
440
441                 if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
442                         break;
443
444                 /* fall through */
445         case ETH_P_BATMAN:
446                 goto dropped;
447         }
448
449         /**
450          * if we have a another chosen mesh exit node in range
451          * it will transport the packets to the non-mesh network
452          */
453         if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
454                 skb_push(skb, hdr_size);
455                 unicast_packet = (struct unicast_packet *)skb->data;
456
457                 if ((unicast_packet->packet_type != BAT_UNICAST) &&
458                     (unicast_packet->packet_type != BAT_UNICAST_FRAG))
459                         goto dropped;
460
461                 skb_reset_mac_header(skb);
462
463                 memcpy(unicast_packet->dest,
464                        bat_priv->softif_neigh->addr, ETH_ALEN);
465                 ret = route_unicast_packet(skb, recv_if);
466                 if (ret == NET_RX_DROP)
467                         goto dropped;
468
469                 goto out;
470         }
471
472         /* skb->dev & skb->pkt_type are set here */
473         if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
474                 goto dropped;
475         skb->protocol = eth_type_trans(skb, soft_iface);
476
477         /* should not be neccesary anymore as we use skb_pull_rcsum()
478          * TODO: please verify this and remove this TODO
479          * -- Dec 21st 2009, Simon Wunderlich */
480
481 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
482
483         bat_priv->stats.rx_packets++;
484         bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
485
486         soft_iface->last_rx = jiffies;
487
488         netif_rx(skb);
489         return;
490
491 dropped:
492         kfree_skb(skb);
493 out:
494         return;
495 }
496
497 #ifdef HAVE_NET_DEVICE_OPS
498 static const struct net_device_ops bat_netdev_ops = {
499         .ndo_open = interface_open,
500         .ndo_stop = interface_release,
501         .ndo_get_stats = interface_stats,
502         .ndo_set_mac_address = interface_set_mac_addr,
503         .ndo_change_mtu = interface_change_mtu,
504         .ndo_start_xmit = interface_tx,
505         .ndo_validate_addr = eth_validate_addr
506 };
507 #endif
508
509 static void interface_setup(struct net_device *dev)
510 {
511         struct bat_priv *priv = netdev_priv(dev);
512         char dev_addr[ETH_ALEN];
513
514         ether_setup(dev);
515
516 #ifdef HAVE_NET_DEVICE_OPS
517         dev->netdev_ops = &bat_netdev_ops;
518 #else
519         dev->open = interface_open;
520         dev->stop = interface_release;
521         dev->get_stats = interface_stats;
522         dev->set_mac_address = interface_set_mac_addr;
523         dev->change_mtu = interface_change_mtu;
524         dev->hard_start_xmit = interface_tx;
525 #endif
526         dev->destructor = free_netdev;
527
528         /**
529          * can't call min_mtu, because the needed variables
530          * have not been initialized yet
531          */
532         dev->mtu = ETH_DATA_LEN;
533         dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
534                                                 * skbuff for our header */
535
536         /* generate random address */
537         random_ether_addr(dev_addr);
538         memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
539
540         SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
541
542         memset(priv, 0, sizeof(struct bat_priv));
543 }
544
545 struct net_device *softif_create(char *name)
546 {
547         struct net_device *soft_iface;
548         struct bat_priv *bat_priv;
549         int ret;
550
551         soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
552                                    interface_setup);
553
554         if (!soft_iface) {
555                 pr_err("Unable to allocate the batman interface: %s\n", name);
556                 goto out;
557         }
558
559         ret = register_netdev(soft_iface);
560         if (ret < 0) {
561                 pr_err("Unable to register the batman interface '%s': %i\n",
562                        name, ret);
563                 goto free_soft_iface;
564         }
565
566         bat_priv = netdev_priv(soft_iface);
567
568         atomic_set(&bat_priv->aggregated_ogms, 1);
569         atomic_set(&bat_priv->bonding, 0);
570         atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
571         atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
572         atomic_set(&bat_priv->gw_sel_class, 20);
573         atomic_set(&bat_priv->gw_bandwidth, 41);
574         atomic_set(&bat_priv->orig_interval, 1000);
575         atomic_set(&bat_priv->hop_penalty, 10);
576         atomic_set(&bat_priv->log_level, 0);
577         atomic_set(&bat_priv->fragmentation, 1);
578         atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
579         atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
580
581         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
582         atomic_set(&bat_priv->bcast_seqno, 1);
583         atomic_set(&bat_priv->hna_local_changed, 0);
584
585         bat_priv->primary_if = NULL;
586         bat_priv->num_ifaces = 0;
587         bat_priv->softif_neigh = NULL;
588
589         ret = sysfs_add_meshif(soft_iface);
590         if (ret < 0)
591                 goto unreg_soft_iface;
592
593         ret = debugfs_add_meshif(soft_iface);
594         if (ret < 0)
595                 goto unreg_sysfs;
596
597         ret = mesh_init(soft_iface);
598         if (ret < 0)
599                 goto unreg_debugfs;
600
601         return soft_iface;
602
603 unreg_debugfs:
604         debugfs_del_meshif(soft_iface);
605 unreg_sysfs:
606         sysfs_del_meshif(soft_iface);
607 unreg_soft_iface:
608         unregister_netdev(soft_iface);
609         return NULL;
610
611 free_soft_iface:
612         free_netdev(soft_iface);
613 out:
614         return NULL;
615 }
616
617 void softif_destroy(struct net_device *soft_iface)
618 {
619         debugfs_del_meshif(soft_iface);
620         sysfs_del_meshif(soft_iface);
621         mesh_free(soft_iface);
622         unregister_netdevice(soft_iface);
623 }
624
625 int softif_is_valid(struct net_device *net_dev)
626 {
627 #ifdef HAVE_NET_DEVICE_OPS
628         if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
629                 return 1;
630 #else
631         if (net_dev->hard_start_xmit == interface_tx)
632                 return 1;
633 #endif
634
635         return 0;
636 }
637
638 /* ethtool */
639 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
640 {
641         cmd->supported = 0;
642         cmd->advertising = 0;
643         cmd->speed = SPEED_10;
644         cmd->duplex = DUPLEX_FULL;
645         cmd->port = PORT_TP;
646         cmd->phy_address = 0;
647         cmd->transceiver = XCVR_INTERNAL;
648         cmd->autoneg = AUTONEG_DISABLE;
649         cmd->maxtxpkt = 0;
650         cmd->maxrxpkt = 0;
651
652         return 0;
653 }
654
655 static void bat_get_drvinfo(struct net_device *dev,
656                             struct ethtool_drvinfo *info)
657 {
658         strcpy(info->driver, "B.A.T.M.A.N. advanced");
659         strcpy(info->version, SOURCE_VERSION);
660         strcpy(info->fw_version, "N/A");
661         strcpy(info->bus_info, "batman");
662 }
663
664 static u32 bat_get_msglevel(struct net_device *dev)
665 {
666         return -EOPNOTSUPP;
667 }
668
669 static void bat_set_msglevel(struct net_device *dev, u32 value)
670 {
671 }
672
673 static u32 bat_get_link(struct net_device *dev)
674 {
675         return 1;
676 }
677
678 static u32 bat_get_rx_csum(struct net_device *dev)
679 {
680         return 0;
681 }
682
683 static int bat_set_rx_csum(struct net_device *dev, u32 data)
684 {
685         return -EOPNOTSUPP;
686 }