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 | |
7da82c06 | 76 | mp = vlan_dev_priv(dev)->egress_priority_map[(skb->priority & 0xF)]; |
1da177e4 LT |
77 | while (mp) { |
78 | if (mp->priority == skb->priority) { | |
2029cc2c PM |
79 | return mp->vlan_qos; /* This should already be shifted |
80 | * to mask correctly with the | |
81 | * VLAN's TCI */ | |
1da177e4 LT |
82 | } |
83 | mp = mp->next; | |
84 | } | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* | |
122952fc | 89 | * Create the VLAN header for an arbitrary protocol layer |
1da177e4 LT |
90 | * |
91 | * saddr=NULL means use device source address | |
92 | * daddr=NULL means leave destination address (eg unresolved arp) | |
93 | * | |
94 | * This is called when the SKB is moving down the stack towards the | |
95 | * physical devices. | |
96 | */ | |
ef3eb3e5 PM |
97 | static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
98 | unsigned short type, | |
99 | const void *daddr, const void *saddr, | |
100 | unsigned int len) | |
1da177e4 LT |
101 | { |
102 | struct vlan_hdr *vhdr; | |
1349fe9a | 103 | unsigned int vhdrlen = 0; |
9bb8582e | 104 | u16 vlan_tci = 0; |
1349fe9a | 105 | int rc; |
1da177e4 | 106 | |
7da82c06 | 107 | if (!(vlan_dev_priv(dev)->flags & VLAN_FLAG_REORDER_HDR)) { |
1da177e4 LT |
108 | vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN); |
109 | ||
7da82c06 | 110 | vlan_tci = vlan_dev_priv(dev)->vlan_id; |
9bb8582e | 111 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
9bb8582e | 112 | vhdr->h_vlan_TCI = htons(vlan_tci); |
1da177e4 LT |
113 | |
114 | /* | |
bf9ae538 OP |
115 | * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
116 | * put the length in here instead. | |
1da177e4 | 117 | */ |
bf9ae538 | 118 | if (type != ETH_P_802_3 && type != ETH_P_802_2) |
1da177e4 | 119 | vhdr->h_vlan_encapsulated_proto = htons(type); |
2029cc2c | 120 | else |
1da177e4 | 121 | vhdr->h_vlan_encapsulated_proto = htons(len); |
279e172a JB |
122 | |
123 | skb->protocol = htons(ETH_P_8021Q); | |
1349fe9a PM |
124 | type = ETH_P_8021Q; |
125 | vhdrlen = VLAN_HLEN; | |
1da177e4 LT |
126 | } |
127 | ||
128 | /* Before delegating work to the lower layer, enter our MAC-address */ | |
129 | if (saddr == NULL) | |
130 | saddr = dev->dev_addr; | |
131 | ||
1349fe9a | 132 | /* Now make the underlying real hard header */ |
7da82c06 | 133 | dev = vlan_dev_priv(dev)->real_dev; |
1349fe9a PM |
134 | rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
135 | if (rc > 0) | |
136 | rc += vhdrlen; | |
1da177e4 LT |
137 | return rc; |
138 | } | |
139 | ||
6eacf8ad AW |
140 | static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
141 | { | |
142 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
143 | if (vlan->netpoll) | |
144 | netpoll_send_skb(vlan->netpoll, skb); | |
145 | #else | |
146 | BUG(); | |
147 | #endif | |
148 | return NETDEV_TX_OK; | |
149 | } | |
150 | ||
6fef4c0c SH |
151 | static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
152 | struct net_device *dev) | |
1da177e4 | 153 | { |
6eacf8ad | 154 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 | 155 | struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
1a123a31 ED |
156 | unsigned int len; |
157 | int ret; | |
55b01e86 | 158 | |
1da177e4 LT |
159 | /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
160 | * | |
161 | * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING | |
162 | * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... | |
163 | */ | |
6ab3b487 | 164 | if (veth->h_vlan_proto != htons(ETH_P_8021Q) || |
6eacf8ad | 165 | vlan->flags & VLAN_FLAG_REORDER_HDR) { |
9bb8582e | 166 | u16 vlan_tci; |
6eacf8ad | 167 | vlan_tci = vlan->vlan_id; |
9bb8582e | 168 | vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb); |
636e19a3 | 169 | skb = __vlan_hwaccel_put_tag(skb, vlan_tci); |
1da177e4 LT |
170 | } |
171 | ||
6eacf8ad | 172 | skb->dev = vlan->real_dev; |
1a123a31 | 173 | len = skb->len; |
6eacf8ad AW |
174 | if (unlikely(netpoll_tx_running(dev))) |
175 | return vlan_netpoll_send_skb(vlan, skb); | |
176 | ||
1a123a31 ED |
177 | ret = dev_queue_xmit(skb); |
178 | ||
2d6c9ffc | 179 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
4af429d2 ED |
180 | struct vlan_pcpu_stats *stats; |
181 | ||
6eacf8ad | 182 | stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
4af429d2 ED |
183 | u64_stats_update_begin(&stats->syncp); |
184 | stats->tx_packets++; | |
185 | stats->tx_bytes += len; | |
307f73df | 186 | u64_stats_update_end(&stats->syncp); |
4af429d2 | 187 | } else { |
6eacf8ad | 188 | this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
4af429d2 | 189 | } |
1a123a31 | 190 | |
cbbef5e1 | 191 | return ret; |
1da177e4 LT |
192 | } |
193 | ||
ef3eb3e5 | 194 | static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
1da177e4 LT |
195 | { |
196 | /* TODO: gotta make sure the underlying layer can handle it, | |
197 | * maybe an IFF_VLAN_CAPABLE flag for devices? | |
198 | */ | |
7da82c06 | 199 | if (vlan_dev_priv(dev)->real_dev->mtu < new_mtu) |
1da177e4 LT |
200 | return -ERANGE; |
201 | ||
202 | dev->mtu = new_mtu; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
c17d8874 | 207 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
9bb8582e | 208 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 209 | { |
7da82c06 | 210 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b020cb48 PM |
211 | |
212 | if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) | |
213 | vlan->nr_ingress_mappings--; | |
214 | else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) | |
215 | vlan->nr_ingress_mappings++; | |
216 | ||
217 | vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; | |
1da177e4 LT |
218 | } |
219 | ||
c17d8874 | 220 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
9bb8582e | 221 | u32 skb_prio, u16 vlan_prio) |
1da177e4 | 222 | { |
7da82c06 | 223 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
1da177e4 LT |
224 | struct vlan_priority_tci_mapping *mp = NULL; |
225 | struct vlan_priority_tci_mapping *np; | |
05423b24 | 226 | u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
122952fc | 227 | |
c17d8874 | 228 | /* See if a priority mapping exists.. */ |
b020cb48 | 229 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
230 | while (mp) { |
231 | if (mp->priority == skb_prio) { | |
b020cb48 PM |
232 | if (mp->vlan_qos && !vlan_qos) |
233 | vlan->nr_egress_mappings--; | |
234 | else if (!mp->vlan_qos && vlan_qos) | |
235 | vlan->nr_egress_mappings++; | |
236 | mp->vlan_qos = vlan_qos; | |
c17d8874 | 237 | return 0; |
1da177e4 | 238 | } |
c17d8874 | 239 | mp = mp->next; |
1da177e4 | 240 | } |
c17d8874 PM |
241 | |
242 | /* Create a new mapping then. */ | |
b020cb48 | 243 | mp = vlan->egress_priority_map[skb_prio & 0xF]; |
c17d8874 PM |
244 | np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
245 | if (!np) | |
246 | return -ENOBUFS; | |
247 | ||
248 | np->next = mp; | |
249 | np->priority = skb_prio; | |
b020cb48 PM |
250 | np->vlan_qos = vlan_qos; |
251 | vlan->egress_priority_map[skb_prio & 0xF] = np; | |
252 | if (vlan_qos) | |
253 | vlan->nr_egress_mappings++; | |
c17d8874 | 254 | return 0; |
1da177e4 LT |
255 | } |
256 | ||
a4bf3af4 | 257 | /* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */ |
b3ce0325 | 258 | int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
1da177e4 | 259 | { |
7da82c06 | 260 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
b3ce0325 PM |
261 | u32 old_flags = vlan->flags; |
262 | ||
5e756593 | 263 | if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
86fbe9bb | 264 | VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP)) |
b3ce0325 PM |
265 | return -EINVAL; |
266 | ||
267 | vlan->flags = (old_flags & ~mask) | (flags & mask); | |
70c03b49 PM |
268 | |
269 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { | |
270 | if (vlan->flags & VLAN_FLAG_GVRP) | |
271 | vlan_gvrp_request_join(dev); | |
272 | else | |
273 | vlan_gvrp_request_leave(dev); | |
274 | } | |
86fbe9bb DW |
275 | |
276 | if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { | |
277 | if (vlan->flags & VLAN_FLAG_MVRP) | |
278 | vlan_mvrp_request_join(dev); | |
279 | else | |
280 | vlan_mvrp_request_leave(dev); | |
281 | } | |
b3ce0325 | 282 | return 0; |
1da177e4 LT |
283 | } |
284 | ||
c17d8874 | 285 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result) |
1da177e4 | 286 | { |
7da82c06 | 287 | strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23); |
1da177e4 LT |
288 | } |
289 | ||
ef3eb3e5 | 290 | static int vlan_dev_open(struct net_device *dev) |
1da177e4 | 291 | { |
7da82c06 | 292 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
8c979c26 PM |
293 | struct net_device *real_dev = vlan->real_dev; |
294 | int err; | |
295 | ||
5e756593 PM |
296 | if (!(real_dev->flags & IFF_UP) && |
297 | !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) | |
1da177e4 LT |
298 | return -ENETDOWN; |
299 | ||
53a2b3a1 | 300 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) { |
a748ee24 | 301 | err = dev_uc_add(real_dev, dev->dev_addr); |
8c979c26 | 302 | if (err < 0) |
89146504 | 303 | goto out; |
8c979c26 | 304 | } |
8c979c26 | 305 | |
89146504 WC |
306 | if (dev->flags & IFF_ALLMULTI) { |
307 | err = dev_set_allmulti(real_dev, 1); | |
308 | if (err < 0) | |
309 | goto del_unicast; | |
310 | } | |
311 | if (dev->flags & IFF_PROMISC) { | |
312 | err = dev_set_promiscuity(real_dev, 1); | |
313 | if (err < 0) | |
314 | goto clear_allmulti; | |
315 | } | |
316 | ||
317 | memcpy(vlan->real_dev_addr, real_dev->dev_addr, ETH_ALEN); | |
6c78dcbd | 318 | |
70c03b49 PM |
319 | if (vlan->flags & VLAN_FLAG_GVRP) |
320 | vlan_gvrp_request_join(dev); | |
321 | ||
86fbe9bb DW |
322 | if (vlan->flags & VLAN_FLAG_MVRP) |
323 | vlan_mvrp_request_join(dev); | |
324 | ||
0ac820ee PO |
325 | if (netif_carrier_ok(real_dev)) |
326 | netif_carrier_on(dev); | |
1da177e4 | 327 | return 0; |
89146504 WC |
328 | |
329 | clear_allmulti: | |
330 | if (dev->flags & IFF_ALLMULTI) | |
331 | dev_set_allmulti(real_dev, -1); | |
332 | del_unicast: | |
53a2b3a1 | 333 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 334 | dev_uc_del(real_dev, dev->dev_addr); |
89146504 | 335 | out: |
adc667e8 | 336 | netif_carrier_off(dev); |
89146504 | 337 | return err; |
1da177e4 LT |
338 | } |
339 | ||
ef3eb3e5 | 340 | static int vlan_dev_stop(struct net_device *dev) |
1da177e4 | 341 | { |
7da82c06 | 342 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
70c03b49 PM |
343 | struct net_device *real_dev = vlan->real_dev; |
344 | ||
56addd6e | 345 | dev_mc_unsync(real_dev, dev); |
a748ee24 | 346 | dev_uc_unsync(real_dev, dev); |
6c78dcbd PM |
347 | if (dev->flags & IFF_ALLMULTI) |
348 | dev_set_allmulti(real_dev, -1); | |
349 | if (dev->flags & IFF_PROMISC) | |
350 | dev_set_promiscuity(real_dev, -1); | |
351 | ||
53a2b3a1 | 352 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 353 | dev_uc_del(real_dev, dev->dev_addr); |
8c979c26 | 354 | |
adc667e8 | 355 | netif_carrier_off(dev); |
1da177e4 LT |
356 | return 0; |
357 | } | |
358 | ||
ef3eb3e5 | 359 | static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
39aaac11 | 360 | { |
7da82c06 | 361 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
39aaac11 PM |
362 | struct sockaddr *addr = p; |
363 | int err; | |
364 | ||
365 | if (!is_valid_ether_addr(addr->sa_data)) | |
366 | return -EADDRNOTAVAIL; | |
367 | ||
368 | if (!(dev->flags & IFF_UP)) | |
369 | goto out; | |
370 | ||
53a2b3a1 | 371 | if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) { |
a748ee24 | 372 | err = dev_uc_add(real_dev, addr->sa_data); |
39aaac11 PM |
373 | if (err < 0) |
374 | return err; | |
375 | } | |
376 | ||
53a2b3a1 | 377 | if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
a748ee24 | 378 | dev_uc_del(real_dev, dev->dev_addr); |
39aaac11 PM |
379 | |
380 | out: | |
381 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
382 | return 0; | |
383 | } | |
384 | ||
ef3eb3e5 | 385 | static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 | 386 | { |
7da82c06 | 387 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
656299f7 | 388 | const struct net_device_ops *ops = real_dev->netdev_ops; |
1da177e4 LT |
389 | struct ifreq ifrr; |
390 | int err = -EOPNOTSUPP; | |
391 | ||
392 | strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); | |
393 | ifrr.ifr_ifru = ifr->ifr_ifru; | |
394 | ||
2029cc2c | 395 | switch (cmd) { |
1da177e4 LT |
396 | case SIOCGMIIPHY: |
397 | case SIOCGMIIREG: | |
398 | case SIOCSMIIREG: | |
656299f7 SH |
399 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) |
400 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
1da177e4 | 401 | break; |
1da177e4 LT |
402 | } |
403 | ||
122952fc | 404 | if (!err) |
1da177e4 LT |
405 | ifr->ifr_ifru = ifrr.ifr_ifru; |
406 | ||
407 | return err; | |
408 | } | |
409 | ||
cc883d16 FB |
410 | static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
411 | { | |
7da82c06 | 412 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
cc883d16 FB |
413 | const struct net_device_ops *ops = real_dev->netdev_ops; |
414 | int err = 0; | |
415 | ||
416 | if (netif_device_present(real_dev) && ops->ndo_neigh_setup) | |
9d40bbda | 417 | err = ops->ndo_neigh_setup(real_dev, pa); |
cc883d16 FB |
418 | |
419 | return err; | |
420 | } | |
421 | ||
f4d5392e | 422 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
423 | static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
424 | struct scatterlist *sgl, unsigned int sgc) | |
425 | { | |
7da82c06 | 426 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
427 | const struct net_device_ops *ops = real_dev->netdev_ops; |
428 | int rc = 0; | |
429 | ||
430 | if (ops->ndo_fcoe_ddp_setup) | |
431 | rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); | |
432 | ||
433 | return rc; | |
434 | } | |
435 | ||
436 | static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) | |
437 | { | |
7da82c06 | 438 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
b85daa53 VD |
439 | const struct net_device_ops *ops = real_dev->netdev_ops; |
440 | int len = 0; | |
441 | ||
442 | if (ops->ndo_fcoe_ddp_done) | |
443 | len = ops->ndo_fcoe_ddp_done(real_dev, xid); | |
444 | ||
445 | return len; | |
446 | } | |
0af46d99 YZ |
447 | |
448 | static int vlan_dev_fcoe_enable(struct net_device *dev) | |
449 | { | |
7da82c06 | 450 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
451 | const struct net_device_ops *ops = real_dev->netdev_ops; |
452 | int rc = -EINVAL; | |
453 | ||
454 | if (ops->ndo_fcoe_enable) | |
455 | rc = ops->ndo_fcoe_enable(real_dev); | |
456 | return rc; | |
457 | } | |
458 | ||
459 | static int vlan_dev_fcoe_disable(struct net_device *dev) | |
460 | { | |
7da82c06 | 461 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
0af46d99 YZ |
462 | const struct net_device_ops *ops = real_dev->netdev_ops; |
463 | int rc = -EINVAL; | |
464 | ||
465 | if (ops->ndo_fcoe_disable) | |
466 | rc = ops->ndo_fcoe_disable(real_dev); | |
467 | return rc; | |
468 | } | |
d6534799 YZ |
469 | |
470 | static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) | |
471 | { | |
7da82c06 | 472 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
d6534799 YZ |
473 | const struct net_device_ops *ops = real_dev->netdev_ops; |
474 | int rc = -EINVAL; | |
475 | ||
476 | if (ops->ndo_fcoe_get_wwn) | |
477 | rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); | |
478 | return rc; | |
479 | } | |
4ea09c9c YZ |
480 | |
481 | static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, | |
482 | struct scatterlist *sgl, unsigned int sgc) | |
483 | { | |
7da82c06 | 484 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
4ea09c9c YZ |
485 | const struct net_device_ops *ops = real_dev->netdev_ops; |
486 | int rc = 0; | |
487 | ||
488 | if (ops->ndo_fcoe_ddp_target) | |
489 | rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); | |
490 | ||
491 | return rc; | |
492 | } | |
b85daa53 VD |
493 | #endif |
494 | ||
ef3eb3e5 | 495 | static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
6c78dcbd | 496 | { |
7da82c06 | 497 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
6c78dcbd | 498 | |
deede2fa MK |
499 | if (dev->flags & IFF_UP) { |
500 | if (change & IFF_ALLMULTI) | |
501 | dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
502 | if (change & IFF_PROMISC) | |
503 | dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); | |
504 | } | |
6c78dcbd PM |
505 | } |
506 | ||
e83a2ea8 | 507 | static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
1da177e4 | 508 | { |
7da82c06 JP |
509 | dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
510 | dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); | |
1da177e4 | 511 | } |
ef3eb3e5 PM |
512 | |
513 | /* | |
514 | * vlan network devices have devices nesting below it, and are a special | |
515 | * "super class" of normal network devices; split their locks off into a | |
516 | * separate class since they always nest. | |
517 | */ | |
518 | static struct lock_class_key vlan_netdev_xmit_lock_key; | |
cf508b12 | 519 | static struct lock_class_key vlan_netdev_addr_lock_key; |
ef3eb3e5 | 520 | |
e8a0464c DM |
521 | static void vlan_dev_set_lockdep_one(struct net_device *dev, |
522 | struct netdev_queue *txq, | |
523 | void *_subclass) | |
c773e847 DM |
524 | { |
525 | lockdep_set_class_and_subclass(&txq->_xmit_lock, | |
e8a0464c DM |
526 | &vlan_netdev_xmit_lock_key, |
527 | *(int *)_subclass); | |
c773e847 DM |
528 | } |
529 | ||
530 | static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass) | |
531 | { | |
cf508b12 DM |
532 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
533 | &vlan_netdev_addr_lock_key, | |
534 | subclass); | |
e8a0464c | 535 | netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass); |
c773e847 DM |
536 | } |
537 | ||
ef3eb3e5 PM |
538 | static const struct header_ops vlan_header_ops = { |
539 | .create = vlan_dev_hard_header, | |
540 | .rebuild = vlan_dev_rebuild_header, | |
541 | .parse = eth_header_parse, | |
542 | }; | |
543 | ||
e949b09b DG |
544 | static struct device_type vlan_type = { |
545 | .name = "vlan", | |
546 | }; | |
547 | ||
213b15ca | 548 | static const struct net_device_ops vlan_netdev_ops; |
f7d1b9f5 | 549 | |
ef3eb3e5 PM |
550 | static int vlan_dev_init(struct net_device *dev) |
551 | { | |
7da82c06 | 552 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
ef3eb3e5 PM |
553 | int subclass = 0; |
554 | ||
adc667e8 JV |
555 | netif_carrier_off(dev); |
556 | ||
ef3eb3e5 | 557 | /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
194dbcc8 JF |
558 | dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
559 | IFF_MASTER | IFF_SLAVE); | |
ef3eb3e5 PM |
560 | dev->iflink = real_dev->ifindex; |
561 | dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | | |
562 | (1<<__LINK_STATE_DORMANT))) | | |
563 | (1<<__LINK_STATE_PRESENT); | |
564 | ||
62f2a3a4 MM |
565 | dev->hw_features = NETIF_F_ALL_CSUM | NETIF_F_SG | |
566 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | | |
567 | NETIF_F_HIGHDMA | NETIF_F_SCTP_CSUM | | |
568 | NETIF_F_ALL_FCOE; | |
569 | ||
8a0427bb | 570 | dev->features |= real_dev->vlan_features | NETIF_F_LLTX; |
1ae4be22 | 571 | dev->gso_max_size = real_dev->gso_max_size; |
5fb13570 | 572 | |
ef3eb3e5 PM |
573 | /* ipv6 shared card related stuff */ |
574 | dev->dev_id = real_dev->dev_id; | |
575 | ||
576 | if (is_zero_ether_addr(dev->dev_addr)) | |
577 | memcpy(dev->dev_addr, real_dev->dev_addr, dev->addr_len); | |
578 | if (is_zero_ether_addr(dev->broadcast)) | |
579 | memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); | |
580 | ||
f4d5392e | 581 | #if IS_ENABLED(CONFIG_FCOE) |
b85daa53 VD |
582 | dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
583 | #endif | |
584 | ||
d870bfb9 | 585 | dev->needed_headroom = real_dev->needed_headroom; |
ef3eb3e5 PM |
586 | if (real_dev->features & NETIF_F_HW_VLAN_TX) { |
587 | dev->header_ops = real_dev->header_ops; | |
588 | dev->hard_header_len = real_dev->hard_header_len; | |
ef3eb3e5 PM |
589 | } else { |
590 | dev->header_ops = &vlan_header_ops; | |
591 | dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; | |
ef3eb3e5 PM |
592 | } |
593 | ||
213b15ca | 594 | dev->netdev_ops = &vlan_netdev_ops; |
636e19a3 | 595 | |
e949b09b DG |
596 | SET_NETDEV_DEVTYPE(dev, &vlan_type); |
597 | ||
26a25239 | 598 | if (is_vlan_dev(real_dev)) |
ef3eb3e5 PM |
599 | subclass = 1; |
600 | ||
c773e847 | 601 | vlan_dev_set_lockdep_class(dev, subclass); |
9793241f | 602 | |
7da82c06 JP |
603 | vlan_dev_priv(dev)->vlan_pcpu_stats = alloc_percpu(struct vlan_pcpu_stats); |
604 | if (!vlan_dev_priv(dev)->vlan_pcpu_stats) | |
9793241f ED |
605 | return -ENOMEM; |
606 | ||
ef3eb3e5 PM |
607 | return 0; |
608 | } | |
609 | ||
23556323 PE |
610 | static void vlan_dev_uninit(struct net_device *dev) |
611 | { | |
612 | struct vlan_priority_tci_mapping *pm; | |
7da82c06 | 613 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
23556323 PE |
614 | int i; |
615 | ||
4af429d2 ED |
616 | free_percpu(vlan->vlan_pcpu_stats); |
617 | vlan->vlan_pcpu_stats = NULL; | |
23556323 PE |
618 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
619 | while ((pm = vlan->egress_priority_map[i]) != NULL) { | |
620 | vlan->egress_priority_map[i] = pm->next; | |
621 | kfree(pm); | |
622 | } | |
623 | } | |
624 | } | |
625 | ||
c8f44aff MM |
626 | static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
627 | netdev_features_t features) | |
8a0427bb | 628 | { |
7da82c06 | 629 | struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
712ae51a | 630 | u32 old_features = features; |
8a0427bb | 631 | |
f0a619cc | 632 | features &= real_dev->vlan_features; |
bc5787c6 MM |
633 | features |= NETIF_F_RXCSUM; |
634 | features &= real_dev->features; | |
712ae51a | 635 | |
6c9c1b54 | 636 | features |= old_features & NETIF_F_SOFT_FEATURES; |
f0a619cc | 637 | features |= NETIF_F_LLTX; |
8a0427bb MM |
638 | |
639 | return features; | |
640 | } | |
641 | ||
b3020061 SH |
642 | static int vlan_ethtool_get_settings(struct net_device *dev, |
643 | struct ethtool_cmd *cmd) | |
644 | { | |
7da82c06 | 645 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
4bc71cb9 JP |
646 | |
647 | return __ethtool_get_settings(vlan->real_dev, cmd); | |
b3020061 SH |
648 | } |
649 | ||
650 | static void vlan_ethtool_get_drvinfo(struct net_device *dev, | |
651 | struct ethtool_drvinfo *info) | |
652 | { | |
7826d43f JP |
653 | strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
654 | strlcpy(info->version, vlan_version, sizeof(info->version)); | |
655 | strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); | |
b3020061 SH |
656 | } |
657 | ||
28172739 | 658 | static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) |
9793241f | 659 | { |
9793241f | 660 | |
7da82c06 | 661 | if (vlan_dev_priv(dev)->vlan_pcpu_stats) { |
4af429d2 ED |
662 | struct vlan_pcpu_stats *p; |
663 | u32 rx_errors = 0, tx_dropped = 0; | |
9793241f ED |
664 | int i; |
665 | ||
666 | for_each_possible_cpu(i) { | |
4af429d2 | 667 | u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
9618e2ff ED |
668 | unsigned int start; |
669 | ||
7da82c06 | 670 | p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
9618e2ff ED |
671 | do { |
672 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
673 | rxpackets = p->rx_packets; | |
674 | rxbytes = p->rx_bytes; | |
675 | rxmulticast = p->rx_multicast; | |
4af429d2 ED |
676 | txpackets = p->tx_packets; |
677 | txbytes = p->tx_bytes; | |
9618e2ff | 678 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
4af429d2 ED |
679 | |
680 | stats->rx_packets += rxpackets; | |
681 | stats->rx_bytes += rxbytes; | |
682 | stats->multicast += rxmulticast; | |
683 | stats->tx_packets += txpackets; | |
684 | stats->tx_bytes += txbytes; | |
685 | /* rx_errors & tx_dropped are u32 */ | |
686 | rx_errors += p->rx_errors; | |
687 | tx_dropped += p->tx_dropped; | |
9793241f | 688 | } |
4af429d2 ED |
689 | stats->rx_errors = rx_errors; |
690 | stats->tx_dropped = tx_dropped; | |
9793241f ED |
691 | } |
692 | return stats; | |
693 | } | |
694 | ||
6d4cdf47 | 695 | #ifdef CONFIG_NET_POLL_CONTROLLER |
de93cb2e | 696 | static void vlan_dev_poll_controller(struct net_device *dev) |
6d4cdf47 BL |
697 | { |
698 | return; | |
699 | } | |
700 | ||
47be03a2 AW |
701 | static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo, |
702 | gfp_t gfp) | |
6d4cdf47 | 703 | { |
f3da3893 AW |
704 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
705 | struct net_device *real_dev = vlan->real_dev; | |
6d4cdf47 BL |
706 | struct netpoll *netpoll; |
707 | int err = 0; | |
708 | ||
47be03a2 | 709 | netpoll = kzalloc(sizeof(*netpoll), gfp); |
6d4cdf47 BL |
710 | err = -ENOMEM; |
711 | if (!netpoll) | |
712 | goto out; | |
713 | ||
47be03a2 | 714 | err = __netpoll_setup(netpoll, real_dev, gfp); |
6d4cdf47 BL |
715 | if (err) { |
716 | kfree(netpoll); | |
717 | goto out; | |
718 | } | |
719 | ||
f3da3893 | 720 | vlan->netpoll = netpoll; |
6d4cdf47 BL |
721 | |
722 | out: | |
723 | return err; | |
724 | } | |
725 | ||
de93cb2e | 726 | static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
6d4cdf47 | 727 | { |
f3da3893 AW |
728 | struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
729 | struct netpoll *netpoll = vlan->netpoll; | |
6d4cdf47 BL |
730 | |
731 | if (!netpoll) | |
732 | return; | |
733 | ||
f3da3893 | 734 | vlan->netpoll = NULL; |
6d4cdf47 | 735 | |
38e6bc18 | 736 | __netpoll_free_rcu(netpoll); |
6d4cdf47 BL |
737 | } |
738 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
739 | ||
75b8846a | 740 | static const struct ethtool_ops vlan_ethtool_ops = { |
b3020061 SH |
741 | .get_settings = vlan_ethtool_get_settings, |
742 | .get_drvinfo = vlan_ethtool_get_drvinfo, | |
75b8846a | 743 | .get_link = ethtool_op_get_link, |
75b8846a PM |
744 | }; |
745 | ||
656299f7 SH |
746 | static const struct net_device_ops vlan_netdev_ops = { |
747 | .ndo_change_mtu = vlan_dev_change_mtu, | |
748 | .ndo_init = vlan_dev_init, | |
749 | .ndo_uninit = vlan_dev_uninit, | |
750 | .ndo_open = vlan_dev_open, | |
751 | .ndo_stop = vlan_dev_stop, | |
669d3e0b VD |
752 | .ndo_start_xmit = vlan_dev_hard_start_xmit, |
753 | .ndo_validate_addr = eth_validate_addr, | |
754 | .ndo_set_mac_address = vlan_dev_set_mac_address, | |
755 | .ndo_set_rx_mode = vlan_dev_set_rx_mode, | |
669d3e0b VD |
756 | .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
757 | .ndo_do_ioctl = vlan_dev_ioctl, | |
758 | .ndo_neigh_setup = vlan_dev_neigh_setup, | |
9618e2ff | 759 | .ndo_get_stats64 = vlan_dev_get_stats64, |
f4d5392e | 760 | #if IS_ENABLED(CONFIG_FCOE) |
669d3e0b VD |
761 | .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
762 | .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, | |
763 | .ndo_fcoe_enable = vlan_dev_fcoe_enable, | |
764 | .ndo_fcoe_disable = vlan_dev_fcoe_disable, | |
765 | .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, | |
4ea09c9c | 766 | .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
6d4cdf47 BL |
767 | #endif |
768 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
769 | .ndo_poll_controller = vlan_dev_poll_controller, | |
770 | .ndo_netpoll_setup = vlan_dev_netpoll_setup, | |
771 | .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, | |
669d3e0b | 772 | #endif |
8a0427bb | 773 | .ndo_fix_features = vlan_dev_fix_features, |
669d3e0b VD |
774 | }; |
775 | ||
ef3eb3e5 PM |
776 | void vlan_setup(struct net_device *dev) |
777 | { | |
778 | ether_setup(dev); | |
779 | ||
780 | dev->priv_flags |= IFF_802_1Q_VLAN; | |
550fd08c | 781 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
ef3eb3e5 PM |
782 | dev->tx_queue_len = 0; |
783 | ||
656299f7 | 784 | dev->netdev_ops = &vlan_netdev_ops; |
ef3eb3e5 | 785 | dev->destructor = free_netdev; |
75b8846a | 786 | dev->ethtool_ops = &vlan_ethtool_ops; |
ef3eb3e5 PM |
787 | |
788 | memset(dev->broadcast, 0, ETH_ALEN); | |
789 | } |