Commit | Line | Data |
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1da177e4 LT |
1 | /* -*- linux-c -*- |
2 | * INET 802.1Q VLAN | |
3 | * Ethernet-type device handling. | |
4 | * | |
5 | * Authors: Ben Greear <greearb@candelatech.com> | |
ad712087 | 6 | * Please send support related email to: netdev@vger.kernel.org |
1da177e4 | 7 | * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
122952fc | 8 | * |
1da177e4 LT |
9 | * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> |
10 | * - reset skb->pkt_type on incoming packets when MAC was changed | |
11 | * - see that changed MAC is saddr for outgoing packets | |
12 | * Oct 20, 2001: Ard van Breeman: | |
13 | * - Fix MC-list, finally. | |
14 | * - Flush MC-list on VLAN destroy. | |
122952fc | 15 | * |
1da177e4 LT |
16 | * |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License | |
19 | * as published by the Free Software Foundation; either version | |
20 | * 2 of the License, or (at your option) any later version. | |
21 | */ | |
22 | ||
afab2d29 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 | 25 | #include <linux/module.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/skbuff.h> |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/etherdevice.h> | |
75b8846a | 30 | #include <linux/ethtool.h> |
1da177e4 LT |
31 | #include <net/arp.h> |
32 | ||
33 | #include "vlan.h" | |
34 | #include "vlanproc.h" | |
35 | #include <linux/if_vlan.h> | |
6d4cdf47 | 36 | #include <linux/netpoll.h> |
1da177e4 LT |
37 | |
38 | /* | |
39 | * Rebuild the Ethernet MAC header. This is called after an ARP | |
40 | * (or in future other address resolution) has completed on this | |
41 | * sk_buff. We now let ARP fill in the other fields. | |
42 | * | |
43 | * This routine CANNOT use cached dst->neigh! | |
44 | * Really, it is used only when dst->neigh is wrong. | |
45 | * | |
46 | * TODO: This needs a checkup, I'm ignorant here. --BLG | |
47 | */ | |
ef3eb3e5 | 48 | static int vlan_dev_rebuild_header(struct sk_buff *skb) |
1da177e4 LT |
49 | { |
50 | struct net_device *dev = skb->dev; | |
51 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); | |
52 | ||
53 | switch (veth->h_vlan_encapsulated_proto) { | |
54 | #ifdef CONFIG_INET | |
60678040 | 55 | case htons(ETH_P_IP): |
1da177e4 LT |
56 | |
57 | /* TODO: Confirm this will work with VLAN headers... */ | |
58 | return arp_find(veth->h_dest, skb); | |
122952fc | 59 | #endif |
1da177e4 | 60 | default: |
afab2d29 | 61 | pr_debug("%s: unable to resolve type %X addresses\n", |
40f98e1a | 62 | dev->name, ntohs(veth->h_vlan_encapsulated_proto)); |
122952fc | 63 | |
1da177e4 LT |
64 | memcpy(veth->h_source, dev->dev_addr, ETH_ALEN); |
65 | break; | |
3ff50b79 | 66 | } |
1da177e4 LT |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
9bb8582e | 71 | static inline u16 |
2029cc2c | 72 | vlan_dev_get_egress_qos_mask(struct net_device *dev, struct sk_buff *skb) |
1da177e4 | 73 | { |
2029cc2c | 74 | struct vlan_priority_tci_mapping *mp; |
1da177e4 | 75 | |
3e3aac49 ED |
76 | smp_rmb(); /* coupled with smp_wmb() in vlan_dev_set_egress_priority() */ |
77 | ||
7da82c06 | 78 | mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
79 | while (mp) { |
80 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
81 | return mp->vlan_qos; /* This should already be shifted |
82 | * to mask correctly with the | |
83 | * VLAN's TCI */ | |
1da177e4 LT |
84 | } |
85 | mp = mp->next; | |
86 | } | |
87 | return 0; | |
88 | } | |
89 | ||
90 | /* | |
122952fc | 91 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
92 | * |
93 | * saddr=NULL means use device source address | |
94 | * daddr=NULL means leave destination address (eg unresolved arp) | |
95 | * | |
96 | * This is called when the SKB is moving down the stack towards the | |
97 | * physical devices. | |
98 | */ | |
ef3eb3e5 PM |
99 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
100 | unsigned short type, | |
101 | const void *daddr, const void *saddr, | |
102 | unsigned int len) | |
1da177e4 | 103 | { |
1fd9b1fc | 104 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 105 | struct vlan_hdr *vhdr; |
1349fe9a | 106 | unsigned int vhdrlen = 0; |
9bb8582e | 107 | u16 vlan_tci = 0; |
1349fe9a | 108 | int rc; |
1da177e4 | 109 | |
0c0667a8 | 110 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
111 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
112 | ||
0c0667a8 | 113 | vlan_tci = vlan->vlan_id; |
9bb8582e | 114 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
9bb8582e | 115 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
116 | |
117 | /* | |
bf9ae538 OP |
118 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
119 | * put the length in here instead. | |
1da177e4 | 120 | */ |
bf9ae538 | 121 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 122 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 123 | else |
1da177e4 | 124 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 125 | |
1fd9b1fc PM |
126 | skb->protocol = vlan->vlan_proto; |
127 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 128 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
129 | } |
130 | ||
131 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
132 | if (saddr == NULL) | |
133 | saddr = dev->dev_addr; | |
134 | ||
1349fe9a | 135 | /* Now make the underlying real hard header */ |
0c0667a8 | 136 | dev = vlan->real_dev; |
1349fe9a PM |
137 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
138 | if (rc > 0) | |
139 | rc += vhdrlen; | |
1da177e4 LT |
140 | return rc; |
141 | } | |
142 | ||
6eacf8ad AW |
143 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
144 | { | |
145 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
146 | if (vlan->netpoll) | |
147 | netpoll_send_skb(vlan->netpoll, skb); | |
148 | #else | |
149 | BUG(); | |
150 | #endif | |
151 | return NETDEV_TX_OK; | |
152 | } | |
153 | ||
6fef4c0c SH |
154 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
155 | struct net_device *dev) | |
1da177e4 | 156 | { |
6eacf8ad | 157 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 158 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
159 | unsigned int len; |
160 | int ret; | |
55b01e86 | 161 | |
1da177e4 LT |
162 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
163 | * | |
164 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
165 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
166 | */ | |
1fd9b1fc | 167 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 168 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 169 | u16 vlan_tci; |
6eacf8ad | 170 | vlan_tci = vlan->vlan_id; |
9bb8582e | 171 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
86a9bad3 | 172 | skb = __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
173 | } |
174 | ||
6eacf8ad | 175 | skb->dev = vlan->real_dev; |
1a123a31 | 176 | len = skb->len; |
6eacf8ad AW |
177 | if (unlikely(netpoll_tx_running(dev))) |
178 | return vlan_netpoll_send_skb(vlan, skb); | |
179 | ||
1a123a31 ED |
180 | ret = dev_queue_xmit(skb); |
181 | ||
2d6c9ffc | 182 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
183 | struct vlan_pcpu_stats *stats; |
184 | ||
6eacf8ad | 185 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
186 | u64_stats_update_begin(&stats->syncp); |
187 | stats->tx_packets++; | |
188 | stats->tx_bytes += len; | |
307f73df | 189 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 190 | } else { |
6eacf8ad | 191 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 192 | } |
1a123a31 | 193 | |
cbbef5e1 | 194 | return ret; |
1da177e4 LT |
195 | } |
196 | ||
ef3eb3e5 | 197 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
198 | { |
199 | /* TODO: gotta make sure the underlying layer can handle it, | |
200 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
201 | */ | |
7da82c06 | 202 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
203 | return -ERANGE; |
204 | ||
205 | dev->mtu = new_mtu; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
c17d8874 | 210 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 211 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 212 | { |
7da82c06 | 213 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
214 | |
215 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
216 | vlan->nr_ingress_mappings--; | |
217 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
218 | vlan->nr_ingress_mappings++; | |
219 | ||
220 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
221 | } |
222 | ||
c17d8874 | 223 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 224 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 225 | { |
7da82c06 | 226 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
227 | struct vlan_priority_tci_mapping *mp = NULL; |
228 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 229 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 230 | |
c17d8874 | 231 | /* See if a priority mapping exists.. */ |
b020cb48 | 232 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
233 | while (mp) { |
234 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
235 | if (mp->vlan_qos && !vlan_qos) |
236 | vlan->nr_egress_mappings--; | |
237 | else if (!mp->vlan_qos && vlan_qos) | |
238 | vlan->nr_egress_mappings++; | |
239 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 240 | return 0; |
1da177e4 | 241 | } |
c17d8874 | 242 | mp = mp->next; |
1da177e4 | 243 | } |
c17d8874 PM |
244 | |
245 | /* Create a new mapping then. */ | |
b020cb48 | 246 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
247 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
248 | if (!np) | |
249 | return -ENOBUFS; | |
250 | ||
251 | np->next = mp; | |
252 | np->priority = skb_prio; | |
b020cb48 | 253 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
254 | /* Before inserting this element in hash table, make sure all its fields |
255 | * are committed to memory. | |
256 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() | |
257 | */ | |
258 | smp_wmb(); | |
b020cb48 PM |
259 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
260 | if (vlan_qos) | |
261 | vlan->nr_egress_mappings++; | |
c17d8874 | 262 | return 0; |
1da177e4 LT |
263 | } |
264 | ||
a4bf3af4 | 265 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 266 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 267 | { |
7da82c06 | 268 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
269 | u32 old_flags = vlan->flags; |
270 | ||
5e756593 | 271 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 272 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
273 | return -EINVAL; |
274 | ||
275 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
276 | |
277 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
278 | if (vlan->flags & VLAN_FLAG_GVRP) | |
279 | vlan_gvrp_request_join(dev); | |
280 | else | |
281 | vlan_gvrp_request_leave(dev); | |
282 | } | |
86fbe9bb DW |
283 | |
284 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
285 | if (vlan->flags & VLAN_FLAG_MVRP) | |
286 | vlan_mvrp_request_join(dev); | |
287 | else | |
288 | vlan_mvrp_request_leave(dev); | |
289 | } | |
b3ce0325 | 290 | return 0; |
1da177e4 LT |
291 | } |
292 | ||
c17d8874 | 293 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 294 | { |
7da82c06 | 295 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
296 | } |
297 | ||
ef3eb3e5 | 298 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 299 | { |
7da82c06 | 300 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
301 | struct net_device *real_dev = vlan->real_dev; |
302 | int err; | |
303 | ||
5e756593 PM |
304 | if (!(real_dev->flags & IFF_UP) && |
305 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
306 | return -ENETDOWN; |
307 | ||
53a2b3a1 | 308 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 309 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 310 | if (err < 0) |
89146504 | 311 | goto out; |
8c979c26 | 312 | } |
8c979c26 | 313 | |
89146504 WC |
314 | if (dev->flags & IFF_ALLMULTI) { |
315 | err = dev_set_allmulti(real_dev, 1); | |
316 | if (err < 0) | |
317 | goto del_unicast; | |
318 | } | |
319 | if (dev->flags & IFF_PROMISC) { | |
320 | err = dev_set_promiscuity(real_dev, 1); | |
321 | if (err < 0) | |
322 | goto clear_allmulti; | |
323 | } | |
324 | ||
325 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 326 | |
70c03b49 PM |
327 | if (vlan->flags & VLAN_FLAG_GVRP) |
328 | vlan_gvrp_request_join(dev); | |
329 | ||
86fbe9bb DW |
330 | if (vlan->flags & VLAN_FLAG_MVRP) |
331 | vlan_mvrp_request_join(dev); | |
332 | ||
0ac820ee PO |
333 | if (netif_carrier_ok(real_dev)) |
334 | netif_carrier_on(dev); | |
1da177e4 | 335 | return 0; |
89146504 WC |
336 | |
337 | clear_allmulti: | |
338 | if (dev->flags & IFF_ALLMULTI) | |
339 | dev_set_allmulti(real_dev, -1); | |
340 | del_unicast: | |
53a2b3a1 | 341 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 342 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 343 | out: |
adc667e8 | 344 | netif_carrier_off(dev); |
89146504 | 345 | return err; |
1da177e4 LT |
346 | } |
347 | ||
ef3eb3e5 | 348 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 349 | { |
7da82c06 | 350 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
351 | struct net_device *real_dev = vlan->real_dev; |
352 | ||
56addd6e | 353 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 354 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
355 | if (dev->flags & IFF_ALLMULTI) |
356 | dev_set_allmulti(real_dev, -1); | |
357 | if (dev->flags & IFF_PROMISC) | |
358 | dev_set_promiscuity(real_dev, -1); | |
359 | ||
53a2b3a1 | 360 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 361 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 362 | |
adc667e8 | 363 | netif_carrier_off(dev); |
1da177e4 LT |
364 | return 0; |
365 | } | |
366 | ||
ef3eb3e5 | 367 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 368 | { |
7da82c06 | 369 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
370 | struct sockaddr *addr = p; |
371 | int err; | |
372 | ||
373 | if (!is_valid_ether_addr(addr->sa_data)) | |
374 | return -EADDRNOTAVAIL; | |
375 | ||
376 | if (!(dev->flags & IFF_UP)) | |
377 | goto out; | |
378 | ||
53a2b3a1 | 379 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 380 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
381 | if (err < 0) |
382 | return err; | |
383 | } | |
384 | ||
53a2b3a1 | 385 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 386 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
387 | |
388 | out: | |
389 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
390 | return 0; | |
391 | } | |
392 | ||
ef3eb3e5 | 393 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 394 | { |
7da82c06 | 395 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 396 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
397 | struct ifreq ifrr; |
398 | int err = -EOPNOTSUPP; | |
399 | ||
400 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
401 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
402 | ||
2029cc2c | 403 | switch (cmd) { |
1da177e4 LT |
404 | case SIOCGMIIPHY: |
405 | case SIOCGMIIREG: | |
406 | case SIOCSMIIREG: | |
656299f7 SH |
407 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
408 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 409 | break; |
1da177e4 LT |
410 | } |
411 | ||
122952fc | 412 | if (!err) |
1da177e4 LT |
413 | ifr->ifr_ifru = ifrr.ifr_ifru; |
414 | ||
415 | return err; | |
416 | } | |
417 | ||
cc883d16 FB |
418 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
419 | { | |
7da82c06 | 420 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
421 | const struct net_device_ops *ops = real_dev->netdev_ops; |
422 | int err = 0; | |
423 | ||
424 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 425 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
426 | |
427 | return err; | |
428 | } | |
429 | ||
f4d5392e | 430 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
431 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
432 | struct scatterlist *sgl, unsigned int sgc) | |
433 | { | |
7da82c06 | 434 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
435 | const struct net_device_ops *ops = real_dev->netdev_ops; |
436 | int rc = 0; | |
437 | ||
438 | if (ops->ndo_fcoe_ddp_setup) | |
439 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
440 | ||
441 | return rc; | |
442 | } | |
443 | ||
444 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
445 | { | |
7da82c06 | 446 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
447 | const struct net_device_ops *ops = real_dev->netdev_ops; |
448 | int len = 0; | |
449 | ||
450 | if (ops->ndo_fcoe_ddp_done) | |
451 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
452 | ||
453 | return len; | |
454 | } | |
0af46d99 YZ |
455 | |
456 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
457 | { | |
7da82c06 | 458 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
459 | const struct net_device_ops *ops = real_dev->netdev_ops; |
460 | int rc = -EINVAL; | |
461 | ||
462 | if (ops->ndo_fcoe_enable) | |
463 | rc = ops->ndo_fcoe_enable(real_dev); | |
464 | return rc; | |
465 | } | |
466 | ||
467 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
468 | { | |
7da82c06 | 469 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
470 | const struct net_device_ops *ops = real_dev->netdev_ops; |
471 | int rc = -EINVAL; | |
472 | ||
473 | if (ops->ndo_fcoe_disable) | |
474 | rc = ops->ndo_fcoe_disable(real_dev); | |
475 | return rc; | |
476 | } | |
d6534799 YZ |
477 | |
478 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
479 | { | |
7da82c06 | 480 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
481 | const struct net_device_ops *ops = real_dev->netdev_ops; |
482 | int rc = -EINVAL; | |
483 | ||
484 | if (ops->ndo_fcoe_get_wwn) | |
485 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
486 | return rc; | |
487 | } | |
4ea09c9c YZ |
488 | |
489 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
490 | struct scatterlist *sgl, unsigned int sgc) | |
491 | { | |
7da82c06 | 492 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
493 | const struct net_device_ops *ops = real_dev->netdev_ops; |
494 | int rc = 0; | |
495 | ||
496 | if (ops->ndo_fcoe_ddp_target) | |
497 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
498 | ||
499 | return rc; | |
500 | } | |
b85daa53 VD |
501 | #endif |
502 | ||
ef3eb3e5 | 503 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 504 | { |
7da82c06 | 505 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 506 | |
deede2fa MK |
507 | if (dev->flags & IFF_UP) { |
508 | if (change & IFF_ALLMULTI) | |
509 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
510 | if (change & IFF_PROMISC) | |
511 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
512 | } | |
6c78dcbd PM |
513 | } |
514 | ||
e83a2ea8 | 515 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 516 | { |
7da82c06 JP |
517 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
518 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 519 | } |
ef3eb3e5 PM |
520 | |
521 | /* | |
522 | * vlan network devices have devices nesting below it, and are a special | |
523 | * "super class" of normal network devices; split their locks off into a | |
524 | * separate class since they always nest. | |
525 | */ | |
526 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 527 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 528 | |
e8a0464c DM |
529 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
530 | struct netdev_queue *txq, | |
531 | void *_subclass) | |
c773e847 DM |
532 | { |
533 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
534 | &vlan_netdev_xmit_lock_key, |
535 | *(int *)_subclass); | |
c773e847 DM |
536 | } |
537 | ||
538 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
539 | { | |
cf508b12 DM |
540 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
541 | &vlan_netdev_addr_lock_key, | |
542 | subclass); | |
e8a0464c | 543 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
544 | } |
545 | ||
ef3eb3e5 PM |
546 | static const struct header_ops vlan_header_ops = { |
547 | .create = vlan_dev_hard_header, | |
548 | .rebuild = vlan_dev_rebuild_header, | |
549 | .parse = eth_header_parse, | |
550 | }; | |
551 | ||
e949b09b DG |
552 | static struct device_type vlan_type = { |
553 | .name = "vlan", | |
554 | }; | |
555 | ||
213b15ca | 556 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 557 | |
ef3eb3e5 PM |
558 | static int vlan_dev_init(struct net_device *dev) |
559 | { | |
7da82c06 | 560 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 PM |
561 | int subclass = 0; |
562 | ||
adc667e8 JV |
563 | netif_carrier_off(dev); |
564 | ||
ef3eb3e5 | 565 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
566 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
567 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
568 | dev->iflink = real_dev->ifindex; |
569 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
570 | (1<<__LINK_STATE_DORMANT))) | | |
571 | (1<<__LINK_STATE_PRESENT); | |
572 | ||
62f2a3a4 MM |
573 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
574 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | | |
575 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | | |
576 | NETIF_F_ALL_FCOE; | |
577 | ||
8a0427bb | 578 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX; |
1ae4be22 | 579 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 580 | |
ef3eb3e5 PM |
581 | /* ipv6 shared card related stuff */ |
582 | dev->dev_id = real_dev->dev_id; | |
583 | ||
584 | if (is_zero_ether_addr(dev->dev_addr)) | |
6b93f4a1 | 585 | eth_hw_addr_inherit(dev, real_dev); |
ef3eb3e5 PM |
586 | if (is_zero_ether_addr(dev->broadcast)) |
587 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
588 | ||
f4d5392e | 589 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
590 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
591 | #endif | |
592 | ||
d870bfb9 | 593 | dev->needed_headroom = real_dev->needed_headroom; |
f646968f | 594 | if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) { |
ef3eb3e5 PM |
595 | dev->header_ops = real_dev->header_ops; |
596 | dev->hard_header_len = real_dev->hard_header_len; | |
ef3eb3e5 PM |
597 | } else { |
598 | dev->header_ops = &vlan_header_ops; | |
599 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
600 | } |
601 | ||
213b15ca | 602 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 603 | |
e949b09b DG |
604 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
605 | ||
26a25239 | 606 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
607 | subclass = 1; |
608 | ||
c773e847 | 609 | vlan_dev_set_lockdep_class(dev, subclass); |
9793241f | 610 | |
7da82c06 JP |
611 | vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); |
612 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) | |
9793241f ED |
613 | return -ENOMEM; |
614 | ||
ef3eb3e5 PM |
615 | return 0; |
616 | } | |
617 | ||
23556323 PE |
618 | static void vlan_dev_uninit(struct net_device *dev) |
619 | { | |
620 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 621 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
622 | int i; |
623 | ||
4af429d2 ED |
624 | free_percpu(vlan->vlan_pcpu_stats); |
625 | vlan->vlan_pcpu_stats = NULL; | |
23556323 PE |
626 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
627 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
628 | vlan->egress_priority_map[i] = pm->next; | |
629 | kfree(pm); | |
630 | } | |
631 | } | |
632 | } | |
633 | ||
c8f44aff MM |
634 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
635 | netdev_features_t features) | |
8a0427bb | 636 | { |
7da82c06 | 637 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 638 | netdev_features_t old_features = features; |
8a0427bb | 639 | |
f0a619cc | 640 | features &= real_dev->vlan_features; |
bc5787c6 MM |
641 | features |= NETIF_F_RXCSUM; |
642 | features &= real_dev->features; | |
712ae51a | 643 | |
6c9c1b54 | 644 | features |= old_features & NETIF_F_SOFT_FEATURES; |
f0a619cc | 645 | features |= NETIF_F_LLTX; |
8a0427bb MM |
646 | |
647 | return features; | |
648 | } | |
649 | ||
b3020061 SH |
650 | static int vlan_ethtool_get_settings(struct net_device *dev, |
651 | struct ethtool_cmd *cmd) | |
652 | { | |
7da82c06 | 653 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
654 | |
655 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
656 | } |
657 | ||
658 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
659 | struct ethtool_drvinfo *info) | |
660 | { | |
7826d43f JP |
661 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
662 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
663 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
664 | } |
665 | ||
28172739 | 666 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 667 | { |
9793241f | 668 | |
7da82c06 | 669 | if (vlan_dev_priv(dev)->vlan_pcpu_stats) { |
4af429d2 ED |
670 | struct vlan_pcpu_stats *p; |
671 | u32 rx_errors = 0, tx_dropped = 0; | |
9793241f ED |
672 | int i; |
673 | ||
674 | for_each_possible_cpu(i) { | |
4af429d2 | 675 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
9618e2ff ED |
676 | unsigned int start; |
677 | ||
7da82c06 | 678 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
9618e2ff ED |
679 | do { |
680 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
681 | rxpackets = p->rx_packets; | |
682 | rxbytes = p->rx_bytes; | |
683 | rxmulticast = p->rx_multicast; | |
4af429d2 ED |
684 | txpackets = p->tx_packets; |
685 | txbytes = p->tx_bytes; | |
9618e2ff | 686 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
4af429d2 ED |
687 | |
688 | stats->rx_packets += rxpackets; | |
689 | stats->rx_bytes += rxbytes; | |
690 | stats->multicast += rxmulticast; | |
691 | stats->tx_packets += txpackets; | |
692 | stats->tx_bytes += txbytes; | |
693 | /* rx_errors & tx_dropped are u32 */ | |
694 | rx_errors += p->rx_errors; | |
695 | tx_dropped += p->tx_dropped; | |
9793241f | 696 | } |
4af429d2 ED |
697 | stats->rx_errors = rx_errors; |
698 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
699 | } |
700 | return stats; | |
701 | } | |
702 | ||
6d4cdf47 | 703 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 704 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
705 | { |
706 | return; | |
707 | } | |
708 | ||
47be03a2 AW |
709 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, |
710 | gfp_t gfp) | |
6d4cdf47 | 711 | { |
f3da3893 AW |
712 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
713 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
714 | struct netpoll *netpoll; |
715 | int err = 0; | |
716 | ||
47be03a2 | 717 | netpoll = kzalloc(sizeof(*netpoll), gfp); |
6d4cdf47 BL |
718 | err = -ENOMEM; |
719 | if (!netpoll) | |
720 | goto out; | |
721 | ||
47be03a2 | 722 | err = __netpoll_setup(netpoll, real_dev, gfp); |
6d4cdf47 BL |
723 | if (err) { |
724 | kfree(netpoll); | |
725 | goto out; | |
726 | } | |
727 | ||
f3da3893 | 728 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
729 | |
730 | out: | |
731 | return err; | |
732 | } | |
733 | ||
de93cb2e | 734 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 735 | { |
f3da3893 AW |
736 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
737 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
738 | |
739 | if (!netpoll) | |
740 | return; | |
741 | ||
f3da3893 | 742 | vlan->netpoll = NULL; |
6d4cdf47 | 743 | |
2cde6acd | 744 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
745 | } |
746 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
747 | ||
75b8846a | 748 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
749 | .get_settings = vlan_ethtool_get_settings, |
750 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 751 | .get_link = ethtool_op_get_link, |
75b8846a PM |
752 | }; |
753 | ||
656299f7 SH |
754 | static const struct net_device_ops vlan_netdev_ops = { |
755 | .ndo_change_mtu = vlan_dev_change_mtu, | |
756 | .ndo_init = vlan_dev_init, | |
757 | .ndo_uninit = vlan_dev_uninit, | |
758 | .ndo_open = vlan_dev_open, | |
759 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
760 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
761 | .ndo_validate_addr = eth_validate_addr, | |
762 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
763 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
764 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
765 | .ndo_do_ioctl = vlan_dev_ioctl, | |
766 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 767 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 768 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
769 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
770 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
771 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
772 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
773 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 774 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
775 | #endif |
776 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
777 | .ndo_poll_controller = vlan_dev_poll_controller, | |
778 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
779 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 780 | #endif |
8a0427bb | 781 | .ndo_fix_features = vlan_dev_fix_features, |
669d3e0b VD |
782 | }; |
783 | ||
ef3eb3e5 PM |
784 | void vlan_setup(struct net_device *dev) |
785 | { | |
786 | ether_setup(dev); | |
787 | ||
788 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
550fd08c | 789 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
ef3eb3e5 PM |
790 | dev->tx_queue_len = 0; |
791 | ||
656299f7 | 792 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 793 | dev->destructor = free_netdev; |
75b8846a | 794 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
795 | |
796 | memset(dev->broadcast, 0, ETH_ALEN); | |
797 | } |