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> | |
37dd9255 | 29 | #include <linux/net_tstamp.h> |
1da177e4 | 30 | #include <linux/etherdevice.h> |
75b8846a | 31 | #include <linux/ethtool.h> |
1da177e4 LT |
32 | #include <net/arp.h> |
33 | ||
34 | #include "vlan.h" | |
35 | #include "vlanproc.h" | |
36 | #include <linux/if_vlan.h> | |
6d4cdf47 | 37 | #include <linux/netpoll.h> |
1da177e4 | 38 | |
1da177e4 | 39 | /* |
122952fc | 40 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
41 | * |
42 | * saddr=NULL means use device source address | |
43 | * daddr=NULL means leave destination address (eg unresolved arp) | |
44 | * | |
45 | * This is called when the SKB is moving down the stack towards the | |
46 | * physical devices. | |
47 | */ | |
ef3eb3e5 PM |
48 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
49 | unsigned short type, | |
50 | const void *daddr, const void *saddr, | |
51 | unsigned int len) | |
1da177e4 | 52 | { |
1fd9b1fc | 53 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 54 | struct vlan_hdr *vhdr; |
1349fe9a | 55 | unsigned int vhdrlen = 0; |
9bb8582e | 56 | u16 vlan_tci = 0; |
1349fe9a | 57 | int rc; |
1da177e4 | 58 | |
0c0667a8 | 59 | if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
60 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
61 | ||
0c0667a8 | 62 | vlan_tci = vlan->vlan_id; |
e267cb96 | 63 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
9bb8582e | 64 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
65 | |
66 | /* | |
bf9ae538 OP |
67 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
68 | * put the length in here instead. | |
1da177e4 | 69 | */ |
bf9ae538 | 70 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 71 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 72 | else |
1da177e4 | 73 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a | 74 | |
1fd9b1fc PM |
75 | skb->protocol = vlan->vlan_proto; |
76 | type = ntohs(vlan->vlan_proto); | |
1349fe9a | 77 | vhdrlen = VLAN_HLEN; |
1da177e4 LT |
78 | } |
79 | ||
80 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
81 | if (saddr == NULL) | |
82 | saddr = dev->dev_addr; | |
83 | ||
1349fe9a | 84 | /* Now make the underlying real hard header */ |
0c0667a8 | 85 | dev = vlan->real_dev; |
1349fe9a PM |
86 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
87 | if (rc > 0) | |
88 | rc += vhdrlen; | |
1da177e4 LT |
89 | return rc; |
90 | } | |
91 | ||
6eacf8ad AW |
92 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
93 | { | |
94 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
95 | if (vlan->netpoll) | |
96 | netpoll_send_skb(vlan->netpoll, skb); | |
97 | #else | |
98 | BUG(); | |
99 | #endif | |
100 | return NETDEV_TX_OK; | |
101 | } | |
102 | ||
6fef4c0c SH |
103 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
104 | struct net_device *dev) | |
1da177e4 | 105 | { |
6eacf8ad | 106 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 107 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
108 | unsigned int len; |
109 | int ret; | |
55b01e86 | 110 | |
1da177e4 LT |
111 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
112 | * | |
113 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
114 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
115 | */ | |
1fd9b1fc | 116 | if (veth->h_vlan_proto != vlan->vlan_proto || |
6eacf8ad | 117 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 118 | u16 vlan_tci; |
6eacf8ad | 119 | vlan_tci = vlan->vlan_id; |
e267cb96 | 120 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
b960a0ac | 121 | __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
1da177e4 LT |
122 | } |
123 | ||
6eacf8ad | 124 | skb->dev = vlan->real_dev; |
1a123a31 | 125 | len = skb->len; |
6eacf8ad AW |
126 | if (unlikely(netpoll_tx_running(dev))) |
127 | return vlan_netpoll_send_skb(vlan, skb); | |
128 | ||
1a123a31 ED |
129 | ret = dev_queue_xmit(skb); |
130 | ||
2d6c9ffc | 131 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
132 | struct vlan_pcpu_stats *stats; |
133 | ||
6eacf8ad | 134 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
135 | u64_stats_update_begin(&stats->syncp); |
136 | stats->tx_packets++; | |
137 | stats->tx_bytes += len; | |
307f73df | 138 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 139 | } else { |
6eacf8ad | 140 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 141 | } |
1a123a31 | 142 | |
cbbef5e1 | 143 | return ret; |
1da177e4 LT |
144 | } |
145 | ||
ef3eb3e5 | 146 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
147 | { |
148 | /* TODO: gotta make sure the underlying layer can handle it, | |
149 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
150 | */ | |
7da82c06 | 151 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
152 | return -ERANGE; |
153 | ||
154 | dev->mtu = new_mtu; | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
c17d8874 | 159 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 160 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 161 | { |
7da82c06 | 162 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
163 | |
164 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
165 | vlan->nr_ingress_mappings--; | |
166 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
167 | vlan->nr_ingress_mappings++; | |
168 | ||
169 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
170 | } |
171 | ||
c17d8874 | 172 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 173 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 174 | { |
7da82c06 | 175 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
176 | struct vlan_priority_tci_mapping *mp = NULL; |
177 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 178 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 179 | |
c17d8874 | 180 | /* See if a priority mapping exists.. */ |
b020cb48 | 181 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
182 | while (mp) { |
183 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
184 | if (mp->vlan_qos && !vlan_qos) |
185 | vlan->nr_egress_mappings--; | |
186 | else if (!mp->vlan_qos && vlan_qos) | |
187 | vlan->nr_egress_mappings++; | |
188 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 189 | return 0; |
1da177e4 | 190 | } |
c17d8874 | 191 | mp = mp->next; |
1da177e4 | 192 | } |
c17d8874 PM |
193 | |
194 | /* Create a new mapping then. */ | |
b020cb48 | 195 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
196 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
197 | if (!np) | |
198 | return -ENOBUFS; | |
199 | ||
200 | np->next = mp; | |
201 | np->priority = skb_prio; | |
b020cb48 | 202 | np->vlan_qos = vlan_qos; |
3e3aac49 ED |
203 | /* Before inserting this element in hash table, make sure all its fields |
204 | * are committed to memory. | |
e267cb96 | 205 | * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
3e3aac49 ED |
206 | */ |
207 | smp_wmb(); | |
b020cb48 PM |
208 | vlan->egress_priority_map[skb_prio & 0xF] = np; |
209 | if (vlan_qos) | |
210 | vlan->nr_egress_mappings++; | |
c17d8874 | 211 | return 0; |
1da177e4 LT |
212 | } |
213 | ||
a4bf3af4 | 214 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 215 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 216 | { |
7da82c06 | 217 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
218 | u32 old_flags = vlan->flags; |
219 | ||
5e756593 | 220 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 221 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
222 | return -EINVAL; |
223 | ||
224 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
225 | |
226 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
227 | if (vlan->flags & VLAN_FLAG_GVRP) | |
228 | vlan_gvrp_request_join(dev); | |
229 | else | |
230 | vlan_gvrp_request_leave(dev); | |
231 | } | |
86fbe9bb DW |
232 | |
233 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
234 | if (vlan->flags & VLAN_FLAG_MVRP) | |
235 | vlan_mvrp_request_join(dev); | |
236 | else | |
237 | vlan_mvrp_request_leave(dev); | |
238 | } | |
b3ce0325 | 239 | return 0; |
1da177e4 LT |
240 | } |
241 | ||
c17d8874 | 242 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 243 | { |
7da82c06 | 244 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
245 | } |
246 | ||
ef3eb3e5 | 247 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 248 | { |
7da82c06 | 249 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
250 | struct net_device *real_dev = vlan->real_dev; |
251 | int err; | |
252 | ||
5e756593 PM |
253 | if (!(real_dev->flags & IFF_UP) && |
254 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
255 | return -ENETDOWN; |
256 | ||
53a2b3a1 | 257 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 258 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 259 | if (err < 0) |
89146504 | 260 | goto out; |
8c979c26 | 261 | } |
8c979c26 | 262 | |
89146504 WC |
263 | if (dev->flags & IFF_ALLMULTI) { |
264 | err = dev_set_allmulti(real_dev, 1); | |
265 | if (err < 0) | |
266 | goto del_unicast; | |
267 | } | |
268 | if (dev->flags & IFF_PROMISC) { | |
269 | err = dev_set_promiscuity(real_dev, 1); | |
270 | if (err < 0) | |
271 | goto clear_allmulti; | |
272 | } | |
273 | ||
07fc67be | 274 | ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
6c78dcbd | 275 | |
70c03b49 PM |
276 | if (vlan->flags & VLAN_FLAG_GVRP) |
277 | vlan_gvrp_request_join(dev); | |
278 | ||
86fbe9bb DW |
279 | if (vlan->flags & VLAN_FLAG_MVRP) |
280 | vlan_mvrp_request_join(dev); | |
281 | ||
0ac820ee PO |
282 | if (netif_carrier_ok(real_dev)) |
283 | netif_carrier_on(dev); | |
1da177e4 | 284 | return 0; |
89146504 WC |
285 | |
286 | clear_allmulti: | |
287 | if (dev->flags & IFF_ALLMULTI) | |
288 | dev_set_allmulti(real_dev, -1); | |
289 | del_unicast: | |
53a2b3a1 | 290 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 291 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 292 | out: |
adc667e8 | 293 | netif_carrier_off(dev); |
89146504 | 294 | return err; |
1da177e4 LT |
295 | } |
296 | ||
ef3eb3e5 | 297 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 298 | { |
7da82c06 | 299 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
300 | struct net_device *real_dev = vlan->real_dev; |
301 | ||
56addd6e | 302 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 303 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
304 | if (dev->flags & IFF_ALLMULTI) |
305 | dev_set_allmulti(real_dev, -1); | |
306 | if (dev->flags & IFF_PROMISC) | |
307 | dev_set_promiscuity(real_dev, -1); | |
308 | ||
53a2b3a1 | 309 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 310 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 311 | |
adc667e8 | 312 | netif_carrier_off(dev); |
1da177e4 LT |
313 | return 0; |
314 | } | |
315 | ||
ef3eb3e5 | 316 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 317 | { |
7da82c06 | 318 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
319 | struct sockaddr *addr = p; |
320 | int err; | |
321 | ||
322 | if (!is_valid_ether_addr(addr->sa_data)) | |
323 | return -EADDRNOTAVAIL; | |
324 | ||
325 | if (!(dev->flags & IFF_UP)) | |
326 | goto out; | |
327 | ||
53a2b3a1 | 328 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 329 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
330 | if (err < 0) |
331 | return err; | |
332 | } | |
333 | ||
53a2b3a1 | 334 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 335 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
336 | |
337 | out: | |
07fc67be | 338 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
39aaac11 PM |
339 | return 0; |
340 | } | |
341 | ||
ef3eb3e5 | 342 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 343 | { |
7da82c06 | 344 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 345 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
346 | struct ifreq ifrr; |
347 | int err = -EOPNOTSUPP; | |
348 | ||
349 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
350 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
351 | ||
2029cc2c | 352 | switch (cmd) { |
1da177e4 LT |
353 | case SIOCGMIIPHY: |
354 | case SIOCGMIIREG: | |
355 | case SIOCSMIIREG: | |
a6111d3c SS |
356 | case SIOCSHWTSTAMP: |
357 | case SIOCGHWTSTAMP: | |
656299f7 SH |
358 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
359 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 360 | break; |
1da177e4 LT |
361 | } |
362 | ||
122952fc | 363 | if (!err) |
1da177e4 LT |
364 | ifr->ifr_ifru = ifrr.ifr_ifru; |
365 | ||
366 | return err; | |
367 | } | |
368 | ||
cc883d16 FB |
369 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
370 | { | |
7da82c06 | 371 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
372 | const struct net_device_ops *ops = real_dev->netdev_ops; |
373 | int err = 0; | |
374 | ||
375 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 376 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
377 | |
378 | return err; | |
379 | } | |
380 | ||
f4d5392e | 381 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
382 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
383 | struct scatterlist *sgl, unsigned int sgc) | |
384 | { | |
7da82c06 | 385 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
386 | const struct net_device_ops *ops = real_dev->netdev_ops; |
387 | int rc = 0; | |
388 | ||
389 | if (ops->ndo_fcoe_ddp_setup) | |
390 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
391 | ||
392 | return rc; | |
393 | } | |
394 | ||
395 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
396 | { | |
7da82c06 | 397 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
398 | const struct net_device_ops *ops = real_dev->netdev_ops; |
399 | int len = 0; | |
400 | ||
401 | if (ops->ndo_fcoe_ddp_done) | |
402 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
403 | ||
404 | return len; | |
405 | } | |
0af46d99 YZ |
406 | |
407 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
408 | { | |
7da82c06 | 409 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
410 | const struct net_device_ops *ops = real_dev->netdev_ops; |
411 | int rc = -EINVAL; | |
412 | ||
413 | if (ops->ndo_fcoe_enable) | |
414 | rc = ops->ndo_fcoe_enable(real_dev); | |
415 | return rc; | |
416 | } | |
417 | ||
418 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
419 | { | |
7da82c06 | 420 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
421 | const struct net_device_ops *ops = real_dev->netdev_ops; |
422 | int rc = -EINVAL; | |
423 | ||
424 | if (ops->ndo_fcoe_disable) | |
425 | rc = ops->ndo_fcoe_disable(real_dev); | |
426 | return rc; | |
427 | } | |
d6534799 YZ |
428 | |
429 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
430 | { | |
7da82c06 | 431 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
432 | const struct net_device_ops *ops = real_dev->netdev_ops; |
433 | int rc = -EINVAL; | |
434 | ||
435 | if (ops->ndo_fcoe_get_wwn) | |
436 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
437 | return rc; | |
438 | } | |
4ea09c9c YZ |
439 | |
440 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
441 | struct scatterlist *sgl, unsigned int sgc) | |
442 | { | |
7da82c06 | 443 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
444 | const struct net_device_ops *ops = real_dev->netdev_ops; |
445 | int rc = 0; | |
446 | ||
447 | if (ops->ndo_fcoe_ddp_target) | |
448 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
449 | ||
450 | return rc; | |
451 | } | |
b85daa53 VD |
452 | #endif |
453 | ||
ef3eb3e5 | 454 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 455 | { |
7da82c06 | 456 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 457 | |
deede2fa MK |
458 | if (dev->flags & IFF_UP) { |
459 | if (change & IFF_ALLMULTI) | |
460 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
461 | if (change & IFF_PROMISC) | |
462 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
463 | } | |
6c78dcbd PM |
464 | } |
465 | ||
e83a2ea8 | 466 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 467 | { |
d38569ab VY |
468 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
469 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 470 | } |
ef3eb3e5 PM |
471 | |
472 | /* | |
473 | * vlan network devices have devices nesting below it, and are a special | |
474 | * "super class" of normal network devices; split their locks off into a | |
475 | * separate class since they always nest. | |
476 | */ | |
477 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 478 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 479 | |
e8a0464c DM |
480 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
481 | struct netdev_queue *txq, | |
482 | void *_subclass) | |
c773e847 DM |
483 | { |
484 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
485 | &vlan_netdev_xmit_lock_key, |
486 | *(int *)_subclass); | |
c773e847 DM |
487 | } |
488 | ||
489 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
490 | { | |
cf508b12 DM |
491 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
492 | &vlan_netdev_addr_lock_key, | |
493 | subclass); | |
e8a0464c | 494 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
495 | } |
496 | ||
d38569ab VY |
497 | static int vlan_dev_get_lock_subclass(struct net_device *dev) |
498 | { | |
499 | return vlan_dev_priv(dev)->nest_level; | |
500 | } | |
501 | ||
ef3eb3e5 PM |
502 | static const struct header_ops vlan_header_ops = { |
503 | .create = vlan_dev_hard_header, | |
ef3eb3e5 PM |
504 | .parse = eth_header_parse, |
505 | }; | |
506 | ||
2205369a DM |
507 | static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
508 | unsigned short type, | |
509 | const void *daddr, const void *saddr, | |
510 | unsigned int len) | |
511 | { | |
512 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
513 | struct net_device *real_dev = vlan->real_dev; | |
514 | ||
dd38743b PB |
515 | if (saddr == NULL) |
516 | saddr = dev->dev_addr; | |
517 | ||
2205369a DM |
518 | return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
519 | } | |
520 | ||
521 | static const struct header_ops vlan_passthru_header_ops = { | |
522 | .create = vlan_passthru_hard_header, | |
2205369a DM |
523 | .parse = eth_header_parse, |
524 | }; | |
525 | ||
e949b09b DG |
526 | static struct device_type vlan_type = { |
527 | .name = "vlan", | |
528 | }; | |
529 | ||
213b15ca | 530 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 531 | |
ef3eb3e5 PM |
532 | static int vlan_dev_init(struct net_device *dev) |
533 | { | |
7da82c06 | 534 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 | 535 | |
adc667e8 JV |
536 | netif_carrier_off(dev); |
537 | ||
ef3eb3e5 | 538 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
539 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
540 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
541 | dev->iflink = real_dev->ifindex; |
542 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
543 | (1<<__LINK_STATE_DORMANT))) | | |
544 | (1<<__LINK_STATE_PRESENT); | |
545 | ||
62f2a3a4 | 546 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
53f6b708 | 547 | NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
62f2a3a4 MM |
548 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | |
549 | NETIF_F_ALL_FCOE; | |
550 | ||
53f6b708 TM |
551 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX | |
552 | NETIF_F_GSO_SOFTWARE; | |
1ae4be22 | 553 | dev->gso_max_size = real_dev->gso_max_size; |
2adb956b VY |
554 | if (dev->features & NETIF_F_VLAN_FEATURES) |
555 | netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); | |
556 | ||
5fb13570 | 557 | |
ef3eb3e5 PM |
558 | /* ipv6 shared card related stuff */ |
559 | dev->dev_id = real_dev->dev_id; | |
560 | ||
561 | if (is_zero_ether_addr(dev->dev_addr)) | |
6b93f4a1 | 562 | eth_hw_addr_inherit(dev, real_dev); |
ef3eb3e5 PM |
563 | if (is_zero_ether_addr(dev->broadcast)) |
564 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
565 | ||
f4d5392e | 566 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
567 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
568 | #endif | |
569 | ||
d870bfb9 | 570 | dev->needed_headroom = real_dev->needed_headroom; |
fc0d48b8 VY |
571 | if (vlan_hw_offload_capable(real_dev->features, |
572 | vlan_dev_priv(dev)->vlan_proto)) { | |
2205369a | 573 | dev->header_ops = &vlan_passthru_header_ops; |
ef3eb3e5 | 574 | dev->hard_header_len = real_dev->hard_header_len; |
ef3eb3e5 PM |
575 | } else { |
576 | dev->header_ops = &vlan_header_ops; | |
577 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
578 | } |
579 | ||
213b15ca | 580 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 581 | |
e949b09b DG |
582 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
583 | ||
d38569ab | 584 | vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev)); |
9793241f | 585 | |
1c213bd2 | 586 | vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
7da82c06 | 587 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) |
9793241f ED |
588 | return -ENOMEM; |
589 | ||
ef3eb3e5 PM |
590 | return 0; |
591 | } | |
592 | ||
23556323 PE |
593 | static void vlan_dev_uninit(struct net_device *dev) |
594 | { | |
595 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 596 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
597 | int i; |
598 | ||
599 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
600 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
601 | vlan->egress_priority_map[i] = pm->next; | |
602 | kfree(pm); | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
c8f44aff MM |
607 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
608 | netdev_features_t features) | |
8a0427bb | 609 | { |
7da82c06 | 610 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b29d3145 | 611 | netdev_features_t old_features = features; |
8a0427bb | 612 | |
da08143b | 613 | features = netdev_intersect_features(features, real_dev->vlan_features); |
bc5787c6 | 614 | features |= NETIF_F_RXCSUM; |
da08143b | 615 | features = netdev_intersect_features(features, real_dev->features); |
712ae51a | 616 | |
53f6b708 | 617 | features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
f0a619cc | 618 | features |= NETIF_F_LLTX; |
8a0427bb MM |
619 | |
620 | return features; | |
621 | } | |
622 | ||
b3020061 SH |
623 | static int vlan_ethtool_get_settings(struct net_device *dev, |
624 | struct ethtool_cmd *cmd) | |
625 | { | |
7da82c06 | 626 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
627 | |
628 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
629 | } |
630 | ||
631 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
632 | struct ethtool_drvinfo *info) | |
633 | { | |
7826d43f JP |
634 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
635 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
636 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
637 | } |
638 | ||
37dd9255 RC |
639 | static int vlan_ethtool_get_ts_info(struct net_device *dev, |
640 | struct ethtool_ts_info *info) | |
641 | { | |
642 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
643 | const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; | |
644 | ||
645 | if (ops->get_ts_info) { | |
646 | return ops->get_ts_info(vlan->real_dev, info); | |
647 | } else { | |
648 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
649 | SOF_TIMESTAMPING_SOFTWARE; | |
650 | info->phc_index = -1; | |
651 | } | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
28172739 | 656 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 657 | { |
5a4ae5f6 LR |
658 | struct vlan_pcpu_stats *p; |
659 | u32 rx_errors = 0, tx_dropped = 0; | |
660 | int i; | |
9793241f | 661 | |
5a4ae5f6 LR |
662 | for_each_possible_cpu(i) { |
663 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; | |
664 | unsigned int start; | |
665 | ||
666 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); | |
667 | do { | |
668 | start = u64_stats_fetch_begin_irq(&p->syncp); | |
669 | rxpackets = p->rx_packets; | |
670 | rxbytes = p->rx_bytes; | |
671 | rxmulticast = p->rx_multicast; | |
672 | txpackets = p->tx_packets; | |
673 | txbytes = p->tx_bytes; | |
674 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); | |
675 | ||
676 | stats->rx_packets += rxpackets; | |
677 | stats->rx_bytes += rxbytes; | |
678 | stats->multicast += rxmulticast; | |
679 | stats->tx_packets += txpackets; | |
680 | stats->tx_bytes += txbytes; | |
681 | /* rx_errors & tx_dropped are u32 */ | |
682 | rx_errors += p->rx_errors; | |
683 | tx_dropped += p->tx_dropped; | |
9793241f | 684 | } |
5a4ae5f6 LR |
685 | stats->rx_errors = rx_errors; |
686 | stats->tx_dropped = tx_dropped; | |
687 | ||
9793241f ED |
688 | return stats; |
689 | } | |
690 | ||
6d4cdf47 | 691 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 692 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
693 | { |
694 | return; | |
695 | } | |
696 | ||
a8779ec1 | 697 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
6d4cdf47 | 698 | { |
f3da3893 AW |
699 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
700 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
701 | struct netpoll *netpoll; |
702 | int err = 0; | |
703 | ||
a8779ec1 | 704 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
6d4cdf47 BL |
705 | err = -ENOMEM; |
706 | if (!netpoll) | |
707 | goto out; | |
708 | ||
a8779ec1 | 709 | err = __netpoll_setup(netpoll, real_dev); |
6d4cdf47 BL |
710 | if (err) { |
711 | kfree(netpoll); | |
712 | goto out; | |
713 | } | |
714 | ||
f3da3893 | 715 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
716 | |
717 | out: | |
718 | return err; | |
719 | } | |
720 | ||
de93cb2e | 721 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 722 | { |
f3da3893 AW |
723 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
724 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
725 | |
726 | if (!netpoll) | |
727 | return; | |
728 | ||
f3da3893 | 729 | vlan->netpoll = NULL; |
6d4cdf47 | 730 | |
2cde6acd | 731 | __netpoll_free_async(netpoll); |
6d4cdf47 BL |
732 | } |
733 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
734 | ||
75b8846a | 735 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
736 | .get_settings = vlan_ethtool_get_settings, |
737 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 738 | .get_link = ethtool_op_get_link, |
37dd9255 | 739 | .get_ts_info = vlan_ethtool_get_ts_info, |
75b8846a PM |
740 | }; |
741 | ||
656299f7 SH |
742 | static const struct net_device_ops vlan_netdev_ops = { |
743 | .ndo_change_mtu = vlan_dev_change_mtu, | |
744 | .ndo_init = vlan_dev_init, | |
745 | .ndo_uninit = vlan_dev_uninit, | |
746 | .ndo_open = vlan_dev_open, | |
747 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
748 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
749 | .ndo_validate_addr = eth_validate_addr, | |
750 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
751 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
752 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
753 | .ndo_do_ioctl = vlan_dev_ioctl, | |
754 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 755 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 756 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
757 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
758 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
759 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
760 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
761 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 762 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
763 | #endif |
764 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
765 | .ndo_poll_controller = vlan_dev_poll_controller, | |
766 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
767 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 768 | #endif |
8a0427bb | 769 | .ndo_fix_features = vlan_dev_fix_features, |
d38569ab | 770 | .ndo_get_lock_subclass = vlan_dev_get_lock_subclass, |
669d3e0b VD |
771 | }; |
772 | ||
a48e5faf ED |
773 | static void vlan_dev_free(struct net_device *dev) |
774 | { | |
775 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); | |
776 | ||
777 | free_percpu(vlan->vlan_pcpu_stats); | |
778 | vlan->vlan_pcpu_stats = NULL; | |
779 | free_netdev(dev); | |
780 | } | |
781 | ||
ef3eb3e5 PM |
782 | void vlan_setup(struct net_device *dev) |
783 | { | |
784 | ether_setup(dev); | |
785 | ||
786 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
02875878 ED |
787 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
788 | netif_keep_dst(dev); | |
ef3eb3e5 PM |
789 | dev->tx_queue_len = 0; |
790 | ||
656299f7 | 791 | dev->netdev_ops = &vlan_netdev_ops; |
a48e5faf | 792 | dev->destructor = vlan_dev_free; |
75b8846a | 793 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
794 | |
795 | memset(dev->broadcast, 0, ETH_ALEN); | |
796 | } |