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Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2d07dc79 JL |
2 | /* |
3 | * GENEVE: Generic Network Virtualization Encapsulation | |
4 | * | |
5 | * Copyright (c) 2015 Red Hat, Inc. | |
2d07dc79 JL |
6 | */ |
7 | ||
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
9 | ||
cc69837f | 10 | #include <linux/ethtool.h> |
2d07dc79 JL |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> | |
2d07dc79 JL |
13 | #include <linux/etherdevice.h> |
14 | #include <linux/hash.h> | |
3616d08b | 15 | #include <net/ipv6_stubs.h> |
e305ac6c | 16 | #include <net/dst_metadata.h> |
8e816df8 | 17 | #include <net/gro_cells.h> |
2d07dc79 JL |
18 | #include <net/rtnetlink.h> |
19 | #include <net/geneve.h> | |
371bd106 | 20 | #include <net/protocol.h> |
2d07dc79 JL |
21 | |
22 | #define GENEVE_NETDEV_VER "0.6" | |
23 | ||
2d07dc79 JL |
24 | #define GENEVE_N_VID (1u << 24) |
25 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
26 | ||
27 | #define VNI_HASH_BITS 10 | |
28 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
29 | ||
30 | static bool log_ecn_error = true; | |
31 | module_param(log_ecn_error, bool, 0644); | |
32 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
33 | ||
371bd106 PS |
34 | #define GENEVE_VER 0 |
35 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
5edbea69 AK |
36 | #define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN) |
37 | #define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN) | |
371bd106 | 38 | |
2d07dc79 JL |
39 | /* per-network namespace private data for this module */ |
40 | struct geneve_net { | |
371bd106 | 41 | struct list_head geneve_list; |
371bd106 | 42 | struct list_head sock_list; |
2d07dc79 JL |
43 | }; |
44 | ||
c7d03a00 | 45 | static unsigned int geneve_net_id; |
371bd106 | 46 | |
4b4c21fa JB |
47 | struct geneve_dev_node { |
48 | struct hlist_node hlist; | |
49 | struct geneve_dev *geneve; | |
50 | }; | |
51 | ||
9e06e859 SD |
52 | struct geneve_config { |
53 | struct ip_tunnel_info info; | |
54 | bool collect_md; | |
55 | bool use_udp6_rx_checksums; | |
56 | bool ttl_inherit; | |
57 | enum ifla_geneve_df df; | |
58 | }; | |
59 | ||
2d07dc79 JL |
60 | /* Pseudo network device */ |
61 | struct geneve_dev { | |
4b4c21fa JB |
62 | struct geneve_dev_node hlist4; /* vni hash table for IPv4 socket */ |
63 | #if IS_ENABLED(CONFIG_IPV6) | |
64 | struct geneve_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
65 | #endif | |
2d07dc79 JL |
66 | struct net *net; /* netns for packet i/o */ |
67 | struct net_device *dev; /* netdev for geneve tunnel */ | |
fceb9c3e | 68 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 69 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 70 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 71 | #endif |
2d07dc79 | 72 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 73 | struct gro_cells gro_cells; |
9e06e859 | 74 | struct geneve_config cfg; |
2d07dc79 JL |
75 | }; |
76 | ||
371bd106 PS |
77 | struct geneve_sock { |
78 | bool collect_md; | |
371bd106 PS |
79 | struct list_head list; |
80 | struct socket *sock; | |
81 | struct rcu_head rcu; | |
82 | int refcnt; | |
66d47003 | 83 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 84 | }; |
2d07dc79 JL |
85 | |
86 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
87 | { | |
88 | __u32 vnid; | |
89 | ||
90 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
91 | return hash_32(vnid, VNI_HASH_BITS); | |
92 | } | |
93 | ||
e305ac6c PS |
94 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
95 | { | |
96 | #ifdef __BIG_ENDIAN | |
97 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
98 | #else | |
99 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
100 | ((__force u64)vni[1] << 48) | | |
101 | ((__force u64)vni[2] << 56)); | |
102 | #endif | |
103 | } | |
104 | ||
9b4437a5 | 105 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
106 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
107 | { | |
108 | #ifdef __BIG_ENDIAN | |
109 | vni[0] = (__force __u8)(tun_id >> 16); | |
110 | vni[1] = (__force __u8)(tun_id >> 8); | |
111 | vni[2] = (__force __u8)tun_id; | |
112 | #else | |
113 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
114 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
115 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
116 | #endif | |
117 | } | |
118 | ||
2e0b26e1 | 119 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
120 | { | |
2e0b26e1 | 121 | return !memcmp(vni, &tun_id[5], 3); |
2e0b26e1 | 122 | } |
123 | ||
1e9f12ec JB |
124 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
125 | { | |
126 | return gs->sock->sk->sk_family; | |
127 | } | |
128 | ||
66d47003 | 129 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 130 | __be32 addr, u8 vni[]) |
2d07dc79 | 131 | { |
2d07dc79 | 132 | struct hlist_head *vni_list_head; |
4b4c21fa | 133 | struct geneve_dev_node *node; |
2d07dc79 JL |
134 | __u32 hash; |
135 | ||
2d07dc79 | 136 | /* Find the device for this VNI */ |
371bd106 | 137 | hash = geneve_net_vni_hash(vni); |
66d47003 | 138 | vni_list_head = &gs->vni_list[hash]; |
4b4c21fa | 139 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
9e06e859 SD |
140 | if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) && |
141 | addr == node->geneve->cfg.info.key.u.ipv4.dst) | |
4b4c21fa | 142 | return node->geneve; |
8ed66f0e JL |
143 | } |
144 | return NULL; | |
145 | } | |
146 | ||
147 | #if IS_ENABLED(CONFIG_IPV6) | |
148 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
149 | struct in6_addr addr6, u8 vni[]) | |
150 | { | |
151 | struct hlist_head *vni_list_head; | |
4b4c21fa | 152 | struct geneve_dev_node *node; |
8ed66f0e JL |
153 | __u32 hash; |
154 | ||
155 | /* Find the device for this VNI */ | |
156 | hash = geneve_net_vni_hash(vni); | |
157 | vni_list_head = &gs->vni_list[hash]; | |
4b4c21fa | 158 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
9e06e859 SD |
159 | if (eq_tun_id_and_vni((u8 *)&node->geneve->cfg.info.key.tun_id, vni) && |
160 | ipv6_addr_equal(&addr6, &node->geneve->cfg.info.key.u.ipv6.dst)) | |
4b4c21fa | 161 | return node->geneve; |
2d07dc79 | 162 | } |
e305ac6c PS |
163 | return NULL; |
164 | } | |
8ed66f0e | 165 | #endif |
e305ac6c | 166 | |
371bd106 PS |
167 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
168 | { | |
169 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
170 | } | |
171 | ||
9fc47545 JB |
172 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
173 | struct sk_buff *skb) | |
e305ac6c | 174 | { |
8ed66f0e | 175 | static u8 zero_vni[3]; |
9b4437a5 | 176 | u8 *vni; |
e305ac6c | 177 | |
1e9f12ec | 178 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 179 | struct iphdr *iph; |
9b4437a5 | 180 | __be32 addr; |
9fc47545 | 181 | |
8ed66f0e | 182 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 183 | |
8ed66f0e JL |
184 | if (gs->collect_md) { |
185 | vni = zero_vni; | |
186 | addr = 0; | |
187 | } else { | |
9fc47545 | 188 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
189 | addr = iph->saddr; |
190 | } | |
191 | ||
9fc47545 | 192 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 193 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 194 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 195 | static struct in6_addr zero_addr6; |
9fc47545 JB |
196 | struct ipv6hdr *ip6h; |
197 | struct in6_addr addr6; | |
198 | ||
8ed66f0e | 199 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 200 | |
8ed66f0e JL |
201 | if (gs->collect_md) { |
202 | vni = zero_vni; | |
203 | addr6 = zero_addr6; | |
204 | } else { | |
9fc47545 | 205 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
206 | addr6 = ip6h->saddr; |
207 | } | |
208 | ||
9fc47545 | 209 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
210 | #endif |
211 | } | |
9fc47545 JB |
212 | return NULL; |
213 | } | |
214 | ||
215 | /* geneve receive/decap routine */ | |
216 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
217 | struct sk_buff *skb) | |
218 | { | |
219 | struct genevehdr *gnvh = geneve_hdr(skb); | |
220 | struct metadata_dst *tun_dst = NULL; | |
fe741e23 | 221 | unsigned int len; |
9fc47545 JB |
222 | int err = 0; |
223 | void *oiph; | |
2d07dc79 | 224 | |
371bd106 | 225 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 226 | __be16 flags; |
e305ac6c | 227 | |
9c2e14b4 | 228 | flags = TUNNEL_KEY | (gnvh->oam ? TUNNEL_OAM : 0) | |
e305ac6c PS |
229 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); |
230 | ||
1e9f12ec | 231 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
232 | vni_to_tunnel_id(gnvh->vni), |
233 | gnvh->opt_len * 4); | |
fe741e23 GM |
234 | if (!tun_dst) { |
235 | geneve->dev->stats.rx_dropped++; | |
e305ac6c | 236 | goto drop; |
fe741e23 | 237 | } |
e305ac6c | 238 | /* Update tunnel dst according to Geneve options. */ |
4c222798 | 239 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
256c87c1 PJV |
240 | gnvh->options, gnvh->opt_len * 4, |
241 | TUNNEL_GENEVE_OPT); | |
e305ac6c PS |
242 | } else { |
243 | /* Drop packets w/ critical options, | |
244 | * since we don't support any... | |
245 | */ | |
fe741e23 GM |
246 | if (gnvh->critical) { |
247 | geneve->dev->stats.rx_frame_errors++; | |
248 | geneve->dev->stats.rx_errors++; | |
e305ac6c | 249 | goto drop; |
fe741e23 | 250 | } |
e305ac6c | 251 | } |
2d07dc79 JL |
252 | |
253 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
254 | skb->protocol = eth_type_trans(skb, geneve->dev); |
255 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
256 | ||
e305ac6c PS |
257 | if (tun_dst) |
258 | skb_dst_set(skb, &tun_dst->dst); | |
259 | ||
2d07dc79 | 260 | /* Ignore packet loops (and multicast echo) */ |
4179b00c ED |
261 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) |
262 | goto rx_error; | |
263 | ||
264 | switch (skb_protocol(skb, true)) { | |
265 | case htons(ETH_P_IP): | |
266 | if (pskb_may_pull(skb, sizeof(struct iphdr))) | |
267 | goto rx_error; | |
268 | break; | |
269 | case htons(ETH_P_IPV6): | |
270 | if (pskb_may_pull(skb, sizeof(struct ipv6hdr))) | |
271 | goto rx_error; | |
272 | break; | |
273 | default: | |
274 | goto rx_error; | |
fe741e23 | 275 | } |
9fc47545 | 276 | oiph = skb_network_header(skb); |
2d07dc79 JL |
277 | skb_reset_network_header(skb); |
278 | ||
9fc47545 JB |
279 | if (geneve_get_sk_family(gs) == AF_INET) |
280 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 281 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
282 | else |
283 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 284 | #endif |
2d07dc79 JL |
285 | |
286 | if (unlikely(err)) { | |
8ed66f0e | 287 | if (log_ecn_error) { |
9fc47545 | 288 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
289 | net_info_ratelimited("non-ECT from %pI4 " |
290 | "with TOS=%#x\n", | |
9fc47545 JB |
291 | &((struct iphdr *)oiph)->saddr, |
292 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 293 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 294 | else |
8ed66f0e | 295 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 296 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
297 | #endif |
298 | } | |
2d07dc79 JL |
299 | if (err > 1) { |
300 | ++geneve->dev->stats.rx_frame_errors; | |
301 | ++geneve->dev->stats.rx_errors; | |
302 | goto drop; | |
303 | } | |
304 | } | |
305 | ||
fe741e23 GM |
306 | len = skb->len; |
307 | err = gro_cells_receive(&geneve->gro_cells, skb); | |
1e84527b FF |
308 | if (likely(err == NET_RX_SUCCESS)) |
309 | dev_sw_netstats_rx_add(geneve->dev, len); | |
310 | ||
2d07dc79 | 311 | return; |
4179b00c ED |
312 | rx_error: |
313 | geneve->dev->stats.rx_errors++; | |
2d07dc79 JL |
314 | drop: |
315 | /* Consume bad packet */ | |
316 | kfree_skb(skb); | |
317 | } | |
318 | ||
319 | /* Setup stats when device is created */ | |
320 | static int geneve_init(struct net_device *dev) | |
321 | { | |
8e816df8 JG |
322 | struct geneve_dev *geneve = netdev_priv(dev); |
323 | int err; | |
324 | ||
2d07dc79 JL |
325 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
326 | if (!dev->tstats) | |
327 | return -ENOMEM; | |
8e816df8 JG |
328 | |
329 | err = gro_cells_init(&geneve->gro_cells, dev); | |
330 | if (err) { | |
331 | free_percpu(dev->tstats); | |
332 | return err; | |
333 | } | |
334 | ||
9e06e859 | 335 | err = dst_cache_init(&geneve->cfg.info.dst_cache, GFP_KERNEL); |
468dfffc PA |
336 | if (err) { |
337 | free_percpu(dev->tstats); | |
338 | gro_cells_destroy(&geneve->gro_cells); | |
339 | return err; | |
340 | } | |
2d07dc79 JL |
341 | return 0; |
342 | } | |
343 | ||
344 | static void geneve_uninit(struct net_device *dev) | |
345 | { | |
8e816df8 JG |
346 | struct geneve_dev *geneve = netdev_priv(dev); |
347 | ||
9e06e859 | 348 | dst_cache_destroy(&geneve->cfg.info.dst_cache); |
8e816df8 | 349 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
350 | free_percpu(dev->tstats); |
351 | } | |
352 | ||
371bd106 PS |
353 | /* Callback from net/ipv4/udp.c to receive packets */ |
354 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
355 | { | |
356 | struct genevehdr *geneveh; | |
9fc47545 | 357 | struct geneve_dev *geneve; |
371bd106 PS |
358 | struct geneve_sock *gs; |
359 | int opts_len; | |
360 | ||
fe741e23 | 361 | /* Need UDP and Geneve header to be present */ |
371bd106 | 362 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) |
e5aed006 | 363 | goto drop; |
371bd106 PS |
364 | |
365 | /* Return packets with reserved bits set */ | |
366 | geneveh = geneve_hdr(skb); | |
367 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 368 | goto drop; |
371bd106 PS |
369 | |
370 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 371 | goto drop; |
371bd106 | 372 | |
9fc47545 JB |
373 | gs = rcu_dereference_sk_user_data(sk); |
374 | if (!gs) | |
375 | goto drop; | |
376 | ||
377 | geneve = geneve_lookup_skb(gs, skb); | |
378 | if (!geneve) | |
379 | goto drop; | |
380 | ||
371bd106 PS |
381 | opts_len = geneveh->opt_len * 4; |
382 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 | 383 | htons(ETH_P_TEB), |
fe741e23 GM |
384 | !net_eq(geneve->net, dev_net(geneve->dev)))) { |
385 | geneve->dev->stats.rx_dropped++; | |
371bd106 | 386 | goto drop; |
fe741e23 | 387 | } |
371bd106 | 388 | |
9fc47545 | 389 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
390 | return 0; |
391 | ||
392 | drop: | |
393 | /* Consume bad packet */ | |
394 | kfree_skb(skb); | |
395 | return 0; | |
371bd106 PS |
396 | } |
397 | ||
a0796644 SB |
398 | /* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */ |
399 | static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb) | |
400 | { | |
401 | struct genevehdr *geneveh; | |
402 | struct geneve_sock *gs; | |
403 | u8 zero_vni[3] = { 0 }; | |
404 | u8 *vni = zero_vni; | |
405 | ||
eccc73a6 | 406 | if (!pskb_may_pull(skb, skb_transport_offset(skb) + GENEVE_BASE_HLEN)) |
a0796644 SB |
407 | return -EINVAL; |
408 | ||
409 | geneveh = geneve_hdr(skb); | |
410 | if (geneveh->ver != GENEVE_VER) | |
411 | return -EINVAL; | |
412 | ||
413 | if (geneveh->proto_type != htons(ETH_P_TEB)) | |
414 | return -EINVAL; | |
415 | ||
416 | gs = rcu_dereference_sk_user_data(sk); | |
417 | if (!gs) | |
418 | return -ENOENT; | |
419 | ||
420 | if (geneve_get_sk_family(gs) == AF_INET) { | |
421 | struct iphdr *iph = ip_hdr(skb); | |
422 | __be32 addr4 = 0; | |
423 | ||
424 | if (!gs->collect_md) { | |
425 | vni = geneve_hdr(skb)->vni; | |
426 | addr4 = iph->daddr; | |
427 | } | |
428 | ||
429 | return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT; | |
430 | } | |
431 | ||
432 | #if IS_ENABLED(CONFIG_IPV6) | |
433 | if (geneve_get_sk_family(gs) == AF_INET6) { | |
434 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
8a962c4a NC |
435 | struct in6_addr addr6; |
436 | ||
437 | memset(&addr6, 0, sizeof(struct in6_addr)); | |
a0796644 SB |
438 | |
439 | if (!gs->collect_md) { | |
440 | vni = geneve_hdr(skb)->vni; | |
441 | addr6 = ip6h->daddr; | |
442 | } | |
443 | ||
444 | return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT; | |
445 | } | |
446 | #endif | |
447 | ||
448 | return -EPFNOSUPPORT; | |
449 | } | |
450 | ||
371bd106 | 451 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, |
9b4437a5 | 452 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
453 | { |
454 | struct socket *sock; | |
455 | struct udp_port_cfg udp_conf; | |
456 | int err; | |
457 | ||
458 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
459 | ||
460 | if (ipv6) { | |
461 | udp_conf.family = AF_INET6; | |
8ed66f0e | 462 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 463 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
464 | } else { |
465 | udp_conf.family = AF_INET; | |
466 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
467 | } | |
468 | ||
469 | udp_conf.local_udp_port = port; | |
470 | ||
471 | /* Open UDP socket */ | |
472 | err = udp_sock_create(net, &udp_conf, &sock); | |
473 | if (err < 0) | |
474 | return ERR_PTR(err); | |
475 | ||
476 | return sock; | |
477 | } | |
478 | ||
371bd106 PS |
479 | static int geneve_hlen(struct genevehdr *gh) |
480 | { | |
481 | return sizeof(*gh) + gh->opt_len * 4; | |
482 | } | |
483 | ||
d4546c25 DM |
484 | static struct sk_buff *geneve_gro_receive(struct sock *sk, |
485 | struct list_head *head, | |
486 | struct sk_buff *skb) | |
371bd106 | 487 | { |
d4546c25 DM |
488 | struct sk_buff *pp = NULL; |
489 | struct sk_buff *p; | |
371bd106 PS |
490 | struct genevehdr *gh, *gh2; |
491 | unsigned int hlen, gh_len, off_gnv; | |
492 | const struct packet_offload *ptype; | |
493 | __be16 type; | |
494 | int flush = 1; | |
495 | ||
496 | off_gnv = skb_gro_offset(skb); | |
497 | hlen = off_gnv + sizeof(*gh); | |
498 | gh = skb_gro_header_fast(skb, off_gnv); | |
499 | if (skb_gro_header_hard(skb, hlen)) { | |
500 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
501 | if (unlikely(!gh)) | |
502 | goto out; | |
503 | } | |
504 | ||
505 | if (gh->ver != GENEVE_VER || gh->oam) | |
506 | goto out; | |
507 | gh_len = geneve_hlen(gh); | |
508 | ||
509 | hlen = off_gnv + gh_len; | |
510 | if (skb_gro_header_hard(skb, hlen)) { | |
511 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
512 | if (unlikely(!gh)) | |
513 | goto out; | |
514 | } | |
515 | ||
d4546c25 | 516 | list_for_each_entry(p, head, list) { |
371bd106 PS |
517 | if (!NAPI_GRO_CB(p)->same_flow) |
518 | continue; | |
519 | ||
520 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
521 | if (gh->opt_len != gh2->opt_len || | |
522 | memcmp(gh, gh2, gh_len)) { | |
523 | NAPI_GRO_CB(p)->same_flow = 0; | |
524 | continue; | |
525 | } | |
526 | } | |
527 | ||
528 | type = gh->proto_type; | |
529 | ||
530 | rcu_read_lock(); | |
531 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 532 | if (!ptype) |
371bd106 | 533 | goto out_unlock; |
371bd106 PS |
534 | |
535 | skb_gro_pull(skb, gh_len); | |
536 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 537 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 538 | flush = 0; |
371bd106 PS |
539 | |
540 | out_unlock: | |
541 | rcu_read_unlock(); | |
542 | out: | |
603d4cf8 | 543 | skb_gro_flush_final(skb, pp, flush); |
371bd106 PS |
544 | |
545 | return pp; | |
546 | } | |
547 | ||
4a0090a9 TH |
548 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
549 | int nhoff) | |
371bd106 PS |
550 | { |
551 | struct genevehdr *gh; | |
552 | struct packet_offload *ptype; | |
553 | __be16 type; | |
554 | int gh_len; | |
555 | int err = -ENOSYS; | |
556 | ||
371bd106 PS |
557 | gh = (struct genevehdr *)(skb->data + nhoff); |
558 | gh_len = geneve_hlen(gh); | |
559 | type = gh->proto_type; | |
560 | ||
561 | rcu_read_lock(); | |
562 | ptype = gro_find_complete_by_type(type); | |
563 | if (ptype) | |
564 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
565 | ||
566 | rcu_read_unlock(); | |
229740c6 JR |
567 | |
568 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
569 | ||
371bd106 PS |
570 | return err; |
571 | } | |
572 | ||
573 | /* Create new listen socket if needed */ | |
574 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 575 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
576 | { |
577 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
578 | struct geneve_sock *gs; | |
579 | struct socket *sock; | |
580 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 581 | int h; |
371bd106 PS |
582 | |
583 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
584 | if (!gs) | |
585 | return ERR_PTR(-ENOMEM); | |
586 | ||
9b4437a5 | 587 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
588 | if (IS_ERR(sock)) { |
589 | kfree(gs); | |
590 | return ERR_CAST(sock); | |
591 | } | |
592 | ||
593 | gs->sock = sock; | |
594 | gs->refcnt = 1; | |
66d47003 PS |
595 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
596 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
597 | |
598 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 599 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
600 | |
601 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 602 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
603 | tunnel_cfg.sk_user_data = gs; |
604 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
605 | tunnel_cfg.gro_receive = geneve_gro_receive; |
606 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 | 607 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
a0796644 | 608 | tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup; |
371bd106 PS |
609 | tunnel_cfg.encap_destroy = NULL; |
610 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
611 | list_add(&gs->list, &gn->sock_list); |
612 | return gs; | |
613 | } | |
614 | ||
8ed66f0e | 615 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 616 | { |
8ed66f0e | 617 | if (!gs || --gs->refcnt) |
371bd106 PS |
618 | return; |
619 | ||
620 | list_del(&gs->list); | |
e7b3db5e | 621 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
622 | udp_tunnel_sock_release(gs->sock); |
623 | kfree_rcu(gs, rcu); | |
624 | } | |
625 | ||
8ed66f0e JL |
626 | static void geneve_sock_release(struct geneve_dev *geneve) |
627 | { | |
fceb9c3e | 628 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 629 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 630 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
631 | ||
632 | rcu_assign_pointer(geneve->sock6, NULL); | |
633 | #endif | |
634 | ||
635 | rcu_assign_pointer(geneve->sock4, NULL); | |
636 | synchronize_net(); | |
637 | ||
638 | __geneve_sock_release(gs4); | |
639 | #if IS_ENABLED(CONFIG_IPV6) | |
640 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
641 | #endif |
642 | } | |
643 | ||
371bd106 | 644 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 645 | sa_family_t family, |
371bd106 PS |
646 | __be16 dst_port) |
647 | { | |
648 | struct geneve_sock *gs; | |
649 | ||
650 | list_for_each_entry(gs, &gn->sock_list, list) { | |
651 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 652 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
653 | return gs; |
654 | } | |
655 | } | |
656 | return NULL; | |
657 | } | |
658 | ||
8ed66f0e | 659 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 660 | { |
2d07dc79 | 661 | struct net *net = geneve->net; |
371bd106 | 662 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
4b4c21fa | 663 | struct geneve_dev_node *node; |
2d07dc79 | 664 | struct geneve_sock *gs; |
9b4437a5 | 665 | __u8 vni[3]; |
66d47003 | 666 | __u32 hash; |
2d07dc79 | 667 | |
9e06e859 | 668 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->cfg.info.key.tp_dst); |
371bd106 PS |
669 | if (gs) { |
670 | gs->refcnt++; | |
671 | goto out; | |
672 | } | |
673 | ||
9e06e859 SD |
674 | gs = geneve_socket_create(net, geneve->cfg.info.key.tp_dst, ipv6, |
675 | geneve->cfg.use_udp6_rx_checksums); | |
2d07dc79 JL |
676 | if (IS_ERR(gs)) |
677 | return PTR_ERR(gs); | |
678 | ||
371bd106 | 679 | out: |
9e06e859 | 680 | gs->collect_md = geneve->cfg.collect_md; |
8ed66f0e | 681 | #if IS_ENABLED(CONFIG_IPV6) |
4b4c21fa | 682 | if (ipv6) { |
fceb9c3e | 683 | rcu_assign_pointer(geneve->sock6, gs); |
4b4c21fa JB |
684 | node = &geneve->hlist6; |
685 | } else | |
8ed66f0e | 686 | #endif |
4b4c21fa | 687 | { |
fceb9c3e | 688 | rcu_assign_pointer(geneve->sock4, gs); |
4b4c21fa JB |
689 | node = &geneve->hlist4; |
690 | } | |
691 | node->geneve = geneve; | |
66d47003 | 692 | |
9e06e859 | 693 | tunnel_id_to_vni(geneve->cfg.info.key.tun_id, vni); |
9b4437a5 | 694 | hash = geneve_net_vni_hash(vni); |
4b4c21fa | 695 | hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
696 | return 0; |
697 | } | |
698 | ||
8ed66f0e JL |
699 | static int geneve_open(struct net_device *dev) |
700 | { | |
701 | struct geneve_dev *geneve = netdev_priv(dev); | |
9e06e859 | 702 | bool metadata = geneve->cfg.collect_md; |
cf1c9ccb | 703 | bool ipv4, ipv6; |
8ed66f0e JL |
704 | int ret = 0; |
705 | ||
9e06e859 | 706 | ipv6 = geneve->cfg.info.mode & IP_TUNNEL_INFO_IPV6 || metadata; |
cf1c9ccb | 707 | ipv4 = !ipv6 || metadata; |
8ed66f0e | 708 | #if IS_ENABLED(CONFIG_IPV6) |
cf1c9ccb | 709 | if (ipv6) { |
8ed66f0e | 710 | ret = geneve_sock_add(geneve, true); |
cf1c9ccb JB |
711 | if (ret < 0 && ret != -EAFNOSUPPORT) |
712 | ipv4 = false; | |
713 | } | |
8ed66f0e | 714 | #endif |
cf1c9ccb | 715 | if (ipv4) |
8ed66f0e JL |
716 | ret = geneve_sock_add(geneve, false); |
717 | if (ret < 0) | |
718 | geneve_sock_release(geneve); | |
719 | ||
720 | return ret; | |
721 | } | |
722 | ||
2d07dc79 JL |
723 | static int geneve_stop(struct net_device *dev) |
724 | { | |
725 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 726 | |
4b4c21fa JB |
727 | hlist_del_init_rcu(&geneve->hlist4.hlist); |
728 | #if IS_ENABLED(CONFIG_IPV6) | |
729 | hlist_del_init_rcu(&geneve->hlist6.hlist); | |
730 | #endif | |
8ed66f0e | 731 | geneve_sock_release(geneve); |
371bd106 PS |
732 | return 0; |
733 | } | |
734 | ||
8ed66f0e | 735 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 736 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
737 | { |
738 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 739 | geneveh->opt_len = info->options_len / 4; |
740 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
741 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 742 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 743 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
744 | geneveh->proto_type = htons(ETH_P_TEB); |
745 | geneveh->rsvd2 = 0; | |
746 | ||
256c87c1 PJV |
747 | if (info->key.tun_flags & TUNNEL_GENEVE_OPT) |
748 | ip_tunnel_info_opts_get(geneveh->options, info); | |
8ed66f0e JL |
749 | } |
750 | ||
c3ef5aa5 | 751 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
752 | const struct ip_tunnel_info *info, | |
753 | bool xnet, int ip_hdr_len) | |
371bd106 | 754 | { |
c3ef5aa5 | 755 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
756 | struct genevehdr *gnvh; |
757 | int min_headroom; | |
758 | int err; | |
759 | ||
c3ef5aa5 | 760 | skb_reset_mac_header(skb); |
8ed66f0e JL |
761 | skb_scrub_packet(skb, xnet); |
762 | ||
c3ef5aa5 | 763 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
764 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 765 | err = skb_cow_head(skb, min_headroom); |
aed069df | 766 | if (unlikely(err)) |
8ed66f0e | 767 | goto free_dst; |
8ed66f0e | 768 | |
aed069df | 769 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 770 | if (err) |
8ed66f0e | 771 | goto free_dst; |
8ed66f0e | 772 | |
d58ff351 | 773 | gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len); |
c3ef5aa5 | 774 | geneve_build_header(gnvh, info); |
8ed66f0e JL |
775 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
776 | return 0; | |
777 | ||
778 | free_dst: | |
779 | dst_release(dst); | |
780 | return err; | |
781 | } | |
8ed66f0e JL |
782 | |
783 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
784 | struct net_device *dev, | |
5b861f6b | 785 | struct geneve_sock *gs4, |
8ed66f0e | 786 | struct flowi4 *fl4, |
34beb215 MG |
787 | const struct ip_tunnel_info *info, |
788 | __be16 dport, __be16 sport) | |
e305ac6c | 789 | { |
db3c6139 | 790 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 791 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 792 | struct dst_cache *dst_cache; |
e305ac6c PS |
793 | struct rtable *rt = NULL; |
794 | __u8 tos; | |
795 | ||
5b861f6b | 796 | if (!gs4) |
fceb9c3e | 797 | return ERR_PTR(-EIO); |
798 | ||
e305ac6c PS |
799 | memset(fl4, 0, sizeof(*fl4)); |
800 | fl4->flowi4_mark = skb->mark; | |
801 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 802 | fl4->daddr = info->key.u.ipv4.dst; |
803 | fl4->saddr = info->key.u.ipv4.src; | |
34beb215 MG |
804 | fl4->fl4_dport = dport; |
805 | fl4->fl4_sport = sport; | |
e305ac6c | 806 | |
9b4437a5 | 807 | tos = info->key.tos; |
9e06e859 | 808 | if ((tos == 1) && !geneve->cfg.collect_md) { |
9b4437a5 | 809 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); |
810 | use_cache = false; | |
468dfffc | 811 | } |
9b4437a5 | 812 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 813 | |
c3ef5aa5 | 814 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
815 | if (use_cache) { |
816 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
817 | if (rt) | |
818 | return rt; | |
e305ac6c | 819 | } |
e305ac6c PS |
820 | rt = ip_route_output_key(geneve->net, fl4); |
821 | if (IS_ERR(rt)) { | |
822 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 823 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
824 | } |
825 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
826 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 827 | ip_rt_put(rt); |
fc4099f1 | 828 | return ERR_PTR(-ELOOP); |
e305ac6c | 829 | } |
468dfffc PA |
830 | if (use_cache) |
831 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
832 | return rt; |
833 | } | |
834 | ||
8ed66f0e JL |
835 | #if IS_ENABLED(CONFIG_IPV6) |
836 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
837 | struct net_device *dev, | |
5b861f6b | 838 | struct geneve_sock *gs6, |
8ed66f0e | 839 | struct flowi6 *fl6, |
34beb215 MG |
840 | const struct ip_tunnel_info *info, |
841 | __be16 dport, __be16 sport) | |
8ed66f0e | 842 | { |
db3c6139 | 843 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 844 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 845 | struct dst_entry *dst = NULL; |
468dfffc | 846 | struct dst_cache *dst_cache; |
3a56f86f | 847 | __u8 prio; |
8ed66f0e | 848 | |
fceb9c3e | 849 | if (!gs6) |
850 | return ERR_PTR(-EIO); | |
851 | ||
8ed66f0e JL |
852 | memset(fl6, 0, sizeof(*fl6)); |
853 | fl6->flowi6_mark = skb->mark; | |
854 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 855 | fl6->daddr = info->key.u.ipv6.dst; |
856 | fl6->saddr = info->key.u.ipv6.src; | |
34beb215 MG |
857 | fl6->fl6_dport = dport; |
858 | fl6->fl6_sport = sport; | |
859 | ||
9b4437a5 | 860 | prio = info->key.tos; |
9e06e859 | 861 | if ((prio == 1) && !geneve->cfg.collect_md) { |
9b4437a5 | 862 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); |
863 | use_cache = false; | |
468dfffc PA |
864 | } |
865 | ||
9b4437a5 | 866 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
867 | info->key.label); | |
c3ef5aa5 | 868 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
869 | if (use_cache) { |
870 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
871 | if (dst) | |
872 | return dst; | |
8ed66f0e | 873 | } |
6c8991f4 SD |
874 | dst = ipv6_stub->ipv6_dst_lookup_flow(geneve->net, gs6->sock->sk, fl6, |
875 | NULL); | |
876 | if (IS_ERR(dst)) { | |
8ed66f0e JL |
877 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); |
878 | return ERR_PTR(-ENETUNREACH); | |
879 | } | |
880 | if (dst->dev == dev) { /* is this necessary? */ | |
881 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
882 | dst_release(dst); | |
883 | return ERR_PTR(-ELOOP); | |
884 | } | |
885 | ||
468dfffc PA |
886 | if (use_cache) |
887 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
888 | return dst; |
889 | } | |
890 | #endif | |
891 | ||
9b4437a5 | 892 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 893 | struct geneve_dev *geneve, |
894 | const struct ip_tunnel_info *info) | |
2d07dc79 | 895 | { |
9b4437a5 | 896 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
897 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
898 | const struct ip_tunnel_key *key = &info->key; | |
899 | struct rtable *rt; | |
2d07dc79 | 900 | struct flowi4 fl4; |
8760ce58 | 901 | __u8 tos, ttl; |
a025fb5f | 902 | __be16 df = 0; |
e305ac6c | 903 | __be16 sport; |
bcceeec3 | 904 | int err; |
980c394c | 905 | |
34beb215 MG |
906 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
907 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, | |
908 | geneve->cfg.info.key.tp_dst, sport); | |
9b4437a5 | 909 | if (IS_ERR(rt)) |
910 | return PTR_ERR(rt); | |
371bd106 | 911 | |
c1a800e8 SB |
912 | err = skb_tunnel_check_pmtu(skb, &rt->dst, |
913 | GENEVE_IPV4_HLEN + info->options_len, | |
914 | netif_is_any_bridge_port(dev)); | |
915 | if (err < 0) { | |
916 | dst_release(&rt->dst); | |
917 | return err; | |
918 | } else if (err) { | |
919 | struct ip_tunnel_info *info; | |
920 | ||
921 | info = skb_tunnel_info(skb); | |
922 | if (info) { | |
923 | info->key.u.ipv4.dst = fl4.saddr; | |
924 | info->key.u.ipv4.src = fl4.daddr; | |
925 | } | |
926 | ||
927 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
928 | dst_release(&rt->dst); | |
929 | return -EINVAL; | |
930 | } | |
931 | ||
932 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
933 | netif_rx(skb); | |
934 | dst_release(&rt->dst); | |
935 | return -EMSGSIZE; | |
936 | } | |
52a589d5 | 937 | |
9e06e859 | 938 | if (geneve->cfg.collect_md) { |
9b4437a5 | 939 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); |
371bd106 | 940 | ttl = key->ttl; |
a025fb5f SB |
941 | |
942 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 943 | } else { |
9b4437a5 | 944 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
9e06e859 | 945 | if (geneve->cfg.ttl_inherit) |
52d0d404 HL |
946 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); |
947 | else | |
948 | ttl = key->ttl; | |
949 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
a025fb5f | 950 | |
9e06e859 | 951 | if (geneve->cfg.df == GENEVE_DF_SET) { |
a025fb5f | 952 | df = htons(IP_DF); |
9e06e859 | 953 | } else if (geneve->cfg.df == GENEVE_DF_INHERIT) { |
a025fb5f SB |
954 | struct ethhdr *eth = eth_hdr(skb); |
955 | ||
956 | if (ntohs(eth->h_proto) == ETH_P_IPV6) { | |
957 | df = htons(IP_DF); | |
958 | } else if (ntohs(eth->h_proto) == ETH_P_IP) { | |
959 | struct iphdr *iph = ip_hdr(skb); | |
960 | ||
961 | if (iph->frag_off & htons(IP_DF)) | |
962 | df = htons(IP_DF); | |
963 | } | |
964 | } | |
2d07dc79 | 965 | } |
2d07dc79 | 966 | |
c3ef5aa5 | 967 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 968 | if (unlikely(err)) |
969 | return err; | |
efeb2267 | 970 | |
9b4437a5 | 971 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
9e06e859 | 972 | tos, ttl, df, sport, geneve->cfg.info.key.tp_dst, |
9b4437a5 | 973 | !net_eq(geneve->net, dev_net(geneve->dev)), |
974 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
975 | return 0; | |
2d07dc79 JL |
976 | } |
977 | ||
8ed66f0e | 978 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 979 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 980 | struct geneve_dev *geneve, |
981 | const struct ip_tunnel_info *info) | |
8ed66f0e | 982 | { |
9b4437a5 | 983 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
984 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
985 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 986 | struct dst_entry *dst = NULL; |
8ed66f0e | 987 | struct flowi6 fl6; |
3a56f86f | 988 | __u8 prio, ttl; |
8ed66f0e | 989 | __be16 sport; |
bcceeec3 | 990 | int err; |
8ed66f0e | 991 | |
34beb215 MG |
992 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
993 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, | |
994 | geneve->cfg.info.key.tp_dst, sport); | |
9b4437a5 | 995 | if (IS_ERR(dst)) |
996 | return PTR_ERR(dst); | |
8ed66f0e | 997 | |
c1a800e8 SB |
998 | err = skb_tunnel_check_pmtu(skb, dst, |
999 | GENEVE_IPV6_HLEN + info->options_len, | |
1000 | netif_is_any_bridge_port(dev)); | |
1001 | if (err < 0) { | |
1002 | dst_release(dst); | |
1003 | return err; | |
1004 | } else if (err) { | |
1005 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1006 | ||
1007 | if (info) { | |
1008 | info->key.u.ipv6.dst = fl6.saddr; | |
1009 | info->key.u.ipv6.src = fl6.daddr; | |
1010 | } | |
1011 | ||
1012 | if (!pskb_may_pull(skb, ETH_HLEN)) { | |
1013 | dst_release(dst); | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | ||
1017 | skb->protocol = eth_type_trans(skb, geneve->dev); | |
1018 | netif_rx(skb); | |
1019 | dst_release(dst); | |
1020 | return -EMSGSIZE; | |
1021 | } | |
52a589d5 | 1022 | |
9e06e859 | 1023 | if (geneve->cfg.collect_md) { |
9b4437a5 | 1024 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); |
1025 | ttl = key->ttl; | |
1026 | } else { | |
1027 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
1028 | ip_hdr(skb), skb); | |
9e06e859 | 1029 | if (geneve->cfg.ttl_inherit) |
52d0d404 HL |
1030 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); |
1031 | else | |
1032 | ttl = key->ttl; | |
1033 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
9b4437a5 | 1034 | } |
31ac1c19 | 1035 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 1036 | if (unlikely(err)) |
1037 | return err; | |
8ed66f0e | 1038 | |
9b4437a5 | 1039 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
1040 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
9e06e859 | 1041 | info->key.label, sport, geneve->cfg.info.key.tp_dst, |
9b4437a5 | 1042 | !(info->key.tun_flags & TUNNEL_CSUM)); |
1043 | return 0; | |
1044 | } | |
1045 | #endif | |
8ed66f0e | 1046 | |
9b4437a5 | 1047 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
1048 | { | |
1049 | struct geneve_dev *geneve = netdev_priv(dev); | |
1050 | struct ip_tunnel_info *info = NULL; | |
1051 | int err; | |
abe492b4 | 1052 | |
9e06e859 | 1053 | if (geneve->cfg.collect_md) { |
9b4437a5 | 1054 | info = skb_tunnel_info(skb); |
1055 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
9b4437a5 | 1056 | netdev_dbg(dev, "no tunnel metadata\n"); |
9d149045 JB |
1057 | dev_kfree_skb(skb); |
1058 | dev->stats.tx_dropped++; | |
1059 | return NETDEV_TX_OK; | |
9b4437a5 | 1060 | } |
8ed66f0e | 1061 | } else { |
9e06e859 | 1062 | info = &geneve->cfg.info; |
8ed66f0e | 1063 | } |
8eb3b995 | 1064 | |
a717e3f7 | 1065 | rcu_read_lock(); |
9b4437a5 | 1066 | #if IS_ENABLED(CONFIG_IPV6) |
1067 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
1068 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
1069 | else | |
1070 | #endif | |
1071 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
a717e3f7 | 1072 | rcu_read_unlock(); |
8ed66f0e | 1073 | |
9b4437a5 | 1074 | if (likely(!err)) |
1075 | return NETDEV_TX_OK; | |
9d149045 | 1076 | |
c1a800e8 SB |
1077 | if (err != -EMSGSIZE) |
1078 | dev_kfree_skb(skb); | |
aed069df | 1079 | |
8ed66f0e JL |
1080 | if (err == -ELOOP) |
1081 | dev->stats.collisions++; | |
1082 | else if (err == -ENETUNREACH) | |
1083 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1084 | |
1085 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1086 | return NETDEV_TX_OK; |
1087 | } | |
8ed66f0e | 1088 | |
91572088 | 1089 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 1090 | { |
91572088 JW |
1091 | if (new_mtu > dev->max_mtu) |
1092 | new_mtu = dev->max_mtu; | |
321acc1c AK |
1093 | else if (new_mtu < dev->min_mtu) |
1094 | new_mtu = dev->min_mtu; | |
aeee0e66 | 1095 | |
55e5bfb5 DW |
1096 | dev->mtu = new_mtu; |
1097 | return 0; | |
1098 | } | |
1099 | ||
fc4099f1 PS |
1100 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1101 | { | |
1102 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1103 | struct geneve_dev *geneve = netdev_priv(dev); | |
34beb215 | 1104 | __be16 sport; |
fc4099f1 | 1105 | |
b8812fa8 | 1106 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 1107 | struct rtable *rt; |
1108 | struct flowi4 fl4; | |
34beb215 | 1109 | |
5b861f6b | 1110 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); |
34beb215 MG |
1111 | sport = udp_flow_src_port(geneve->net, skb, |
1112 | 1, USHRT_MAX, true); | |
9b4437a5 | 1113 | |
34beb215 MG |
1114 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info, |
1115 | geneve->cfg.info.key.tp_dst, sport); | |
b8812fa8 JL |
1116 | if (IS_ERR(rt)) |
1117 | return PTR_ERR(rt); | |
fc4099f1 | 1118 | |
b8812fa8 JL |
1119 | ip_rt_put(rt); |
1120 | info->key.u.ipv4.src = fl4.saddr; | |
1121 | #if IS_ENABLED(CONFIG_IPV6) | |
1122 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 1123 | struct dst_entry *dst; |
1124 | struct flowi6 fl6; | |
34beb215 | 1125 | |
5b861f6b | 1126 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); |
34beb215 MG |
1127 | sport = udp_flow_src_port(geneve->net, skb, |
1128 | 1, USHRT_MAX, true); | |
9b4437a5 | 1129 | |
34beb215 MG |
1130 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info, |
1131 | geneve->cfg.info.key.tp_dst, sport); | |
b8812fa8 JL |
1132 | if (IS_ERR(dst)) |
1133 | return PTR_ERR(dst); | |
1134 | ||
1135 | dst_release(dst); | |
1136 | info->key.u.ipv6.src = fl6.saddr; | |
1137 | #endif | |
1138 | } else { | |
1139 | return -EINVAL; | |
1140 | } | |
fc4099f1 | 1141 | |
34beb215 | 1142 | info->key.tp_src = sport; |
9e06e859 | 1143 | info->key.tp_dst = geneve->cfg.info.key.tp_dst; |
fc4099f1 PS |
1144 | return 0; |
1145 | } | |
1146 | ||
2d07dc79 JL |
1147 | static const struct net_device_ops geneve_netdev_ops = { |
1148 | .ndo_init = geneve_init, | |
1149 | .ndo_uninit = geneve_uninit, | |
1150 | .ndo_open = geneve_open, | |
1151 | .ndo_stop = geneve_stop, | |
1152 | .ndo_start_xmit = geneve_xmit, | |
b220a4a7 | 1153 | .ndo_get_stats64 = dev_get_tstats64, |
55e5bfb5 | 1154 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1155 | .ndo_validate_addr = eth_validate_addr, |
1156 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1157 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1158 | }; |
1159 | ||
1160 | static void geneve_get_drvinfo(struct net_device *dev, | |
1161 | struct ethtool_drvinfo *drvinfo) | |
1162 | { | |
1163 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1164 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1165 | } | |
1166 | ||
1167 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1168 | .get_drvinfo = geneve_get_drvinfo, | |
1169 | .get_link = ethtool_op_get_link, | |
1170 | }; | |
1171 | ||
1172 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1173 | static struct device_type geneve_type = { | |
1174 | .name = "geneve", | |
1175 | }; | |
1176 | ||
e5de25dc | 1177 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1178 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1179 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1180 | */ |
2d2b13fc | 1181 | static void geneve_offload_rx_ports(struct net_device *dev, bool push) |
05ca4029 SA |
1182 | { |
1183 | struct net *net = dev_net(dev); | |
1184 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1185 | struct geneve_sock *gs; | |
681e683f | 1186 | |
05ca4029 | 1187 | rcu_read_lock(); |
2d2b13fc SD |
1188 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { |
1189 | if (push) { | |
1190 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1191 | UDP_TUNNEL_TYPE_GENEVE); | |
1192 | } else { | |
1193 | udp_tunnel_drop_rx_port(dev, gs->sock, | |
1194 | UDP_TUNNEL_TYPE_GENEVE); | |
1195 | } | |
1196 | } | |
05ca4029 SA |
1197 | rcu_read_unlock(); |
1198 | } | |
05ca4029 | 1199 | |
2d07dc79 JL |
1200 | /* Initialize the device structure. */ |
1201 | static void geneve_setup(struct net_device *dev) | |
1202 | { | |
1203 | ether_setup(dev); | |
1204 | ||
1205 | dev->netdev_ops = &geneve_netdev_ops; | |
1206 | dev->ethtool_ops = &geneve_ethtool_ops; | |
cf124db5 | 1207 | dev->needs_free_netdev = true; |
2d07dc79 JL |
1208 | |
1209 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1210 | ||
2d07dc79 JL |
1211 | dev->features |= NETIF_F_LLTX; |
1212 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1213 | dev->features |= NETIF_F_RXCSUM; | |
1214 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1215 | ||
2d07dc79 JL |
1216 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1217 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1218 | |
91572088 JW |
1219 | /* MTU range: 68 - (something less than 65535) */ |
1220 | dev->min_mtu = ETH_MIN_MTU; | |
1221 | /* The max_mtu calculation does not take account of GENEVE | |
1222 | * options, to avoid excluding potentially valid | |
1223 | * configurations. This will be further reduced by IPvX hdr size. | |
1224 | */ | |
1225 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1226 | ||
2d07dc79 | 1227 | netif_keep_dst(dev); |
fc41cdb3 | 1228 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1229 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1230 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1231 | } |
1232 | ||
1233 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1234 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
c593642c | 1235 | [IFLA_GENEVE_REMOTE] = { .len = sizeof_field(struct iphdr, daddr) }, |
8ed66f0e | 1236 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1237 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1238 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1239 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1240 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1241 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1242 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1243 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1244 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
52d0d404 | 1245 | [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 }, |
a025fb5f | 1246 | [IFLA_GENEVE_DF] = { .type = NLA_U8 }, |
2d07dc79 JL |
1247 | }; |
1248 | ||
a8b8a889 MS |
1249 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], |
1250 | struct netlink_ext_ack *extack) | |
2d07dc79 JL |
1251 | { |
1252 | if (tb[IFLA_ADDRESS]) { | |
c5ebc440 GM |
1253 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1254 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1255 | "Provided link layer address is not Ethernet"); | |
2d07dc79 | 1256 | return -EINVAL; |
c5ebc440 | 1257 | } |
2d07dc79 | 1258 | |
c5ebc440 GM |
1259 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
1260 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1261 | "Provided Ethernet address is not unicast"); | |
2d07dc79 | 1262 | return -EADDRNOTAVAIL; |
c5ebc440 | 1263 | } |
2d07dc79 JL |
1264 | } |
1265 | ||
c5ebc440 GM |
1266 | if (!data) { |
1267 | NL_SET_ERR_MSG(extack, | |
1268 | "Not enough attributes provided to perform the operation"); | |
2d07dc79 | 1269 | return -EINVAL; |
c5ebc440 | 1270 | } |
2d07dc79 JL |
1271 | |
1272 | if (data[IFLA_GENEVE_ID]) { | |
1273 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1274 | ||
c5ebc440 GM |
1275 | if (vni >= GENEVE_N_VID) { |
1276 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID], | |
1277 | "Geneve ID must be lower than 16777216"); | |
2d07dc79 | 1278 | return -ERANGE; |
c5ebc440 | 1279 | } |
2d07dc79 JL |
1280 | } |
1281 | ||
a025fb5f SB |
1282 | if (data[IFLA_GENEVE_DF]) { |
1283 | enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1284 | ||
1285 | if (df < 0 || df > GENEVE_DF_MAX) { | |
9a7b5b50 | 1286 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_DF], |
a025fb5f SB |
1287 | "Invalid DF attribute"); |
1288 | return -EINVAL; | |
1289 | } | |
1290 | } | |
1291 | ||
2d07dc79 JL |
1292 | return 0; |
1293 | } | |
1294 | ||
371bd106 | 1295 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1296 | const struct ip_tunnel_info *info, |
371bd106 PS |
1297 | bool *tun_on_same_port, |
1298 | bool *tun_collect_md) | |
1299 | { | |
9b4437a5 | 1300 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1301 | |
1302 | *tun_on_same_port = false; | |
1303 | *tun_collect_md = false; | |
371bd106 | 1304 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9e06e859 SD |
1305 | if (info->key.tp_dst == geneve->cfg.info.key.tp_dst) { |
1306 | *tun_collect_md = geneve->cfg.collect_md; | |
371bd106 PS |
1307 | *tun_on_same_port = true; |
1308 | } | |
9e06e859 SD |
1309 | if (info->key.tun_id == geneve->cfg.info.key.tun_id && |
1310 | info->key.tp_dst == geneve->cfg.info.key.tp_dst && | |
1311 | !memcmp(&info->key.u, &geneve->cfg.info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1312 | t = geneve; |
1313 | } | |
1314 | return t; | |
1315 | } | |
1316 | ||
9b4437a5 | 1317 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) |
1318 | { | |
3fa5f11d SB |
1319 | return !(info->key.tun_id || info->key.tun_flags || info->key.tos || |
1320 | info->key.ttl || info->key.label || info->key.tp_src || | |
1321 | memchr_inv(&info->key.u, 0, sizeof(info->key.u))); | |
9b4437a5 | 1322 | } |
1323 | ||
5b861f6b GM |
1324 | static bool geneve_dst_addr_equal(struct ip_tunnel_info *a, |
1325 | struct ip_tunnel_info *b) | |
1326 | { | |
1327 | if (ip_tunnel_info_af(a) == AF_INET) | |
1328 | return a->key.u.ipv4.dst == b->key.u.ipv4.dst; | |
1329 | else | |
1330 | return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst); | |
1331 | } | |
1332 | ||
e305ac6c | 1333 | static int geneve_configure(struct net *net, struct net_device *dev, |
c5ebc440 | 1334 | struct netlink_ext_ack *extack, |
9e06e859 | 1335 | const struct geneve_config *cfg) |
2d07dc79 JL |
1336 | { |
1337 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 | 1338 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
9e06e859 | 1339 | const struct ip_tunnel_info *info = &cfg->info; |
371bd106 | 1340 | bool tun_collect_md, tun_on_same_port; |
184fc8b5 | 1341 | int err, encap_len; |
2d07dc79 | 1342 | |
9e06e859 | 1343 | if (cfg->collect_md && !is_tnl_info_zero(info)) { |
c5ebc440 GM |
1344 | NL_SET_ERR_MSG(extack, |
1345 | "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified"); | |
8ed66f0e | 1346 | return -EINVAL; |
c5ebc440 | 1347 | } |
2d07dc79 JL |
1348 | |
1349 | geneve->net = net; | |
1350 | geneve->dev = dev; | |
1351 | ||
9b4437a5 | 1352 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1353 | if (t) |
1354 | return -EBUSY; | |
1355 | ||
184fc8b5 PA |
1356 | /* make enough headroom for basic scenario */ |
1357 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9e06e859 | 1358 | if (!cfg->collect_md && ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1359 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1360 | dev->max_mtu -= sizeof(struct iphdr); |
1361 | } else { | |
184fc8b5 | 1362 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1363 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1364 | } | |
184fc8b5 PA |
1365 | dev->needed_headroom = encap_len + ETH_HLEN; |
1366 | ||
9e06e859 | 1367 | if (cfg->collect_md) { |
c5ebc440 GM |
1368 | if (tun_on_same_port) { |
1369 | NL_SET_ERR_MSG(extack, | |
1370 | "There can be only one externally controlled device on a destination port"); | |
371bd106 | 1371 | return -EPERM; |
c5ebc440 | 1372 | } |
371bd106 | 1373 | } else { |
c5ebc440 GM |
1374 | if (tun_collect_md) { |
1375 | NL_SET_ERR_MSG(extack, | |
1376 | "There already exists an externally controlled device on this destination port"); | |
371bd106 | 1377 | return -EPERM; |
c5ebc440 | 1378 | } |
371bd106 PS |
1379 | } |
1380 | ||
9e06e859 SD |
1381 | dst_cache_reset(&geneve->cfg.info.dst_cache); |
1382 | memcpy(&geneve->cfg, cfg, sizeof(*cfg)); | |
468dfffc | 1383 | |
2d07dc79 JL |
1384 | err = register_netdevice(dev); |
1385 | if (err) | |
1386 | return err; | |
1387 | ||
e305ac6c | 1388 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1389 | return 0; |
1390 | } | |
1391 | ||
9b4437a5 | 1392 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1393 | { | |
1394 | memset(info, 0, sizeof(*info)); | |
1395 | info->key.tp_dst = htons(dst_port); | |
1396 | } | |
1397 | ||
c5ebc440 GM |
1398 | static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[], |
1399 | struct netlink_ext_ack *extack, | |
9e06e859 | 1400 | struct geneve_config *cfg, bool changelink) |
e305ac6c | 1401 | { |
9e06e859 | 1402 | struct ip_tunnel_info *info = &cfg->info; |
c5ebc440 GM |
1403 | int attrtype; |
1404 | ||
1405 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) { | |
1406 | NL_SET_ERR_MSG(extack, | |
1407 | "Cannot specify both IPv4 and IPv6 Remote addresses"); | |
8ed66f0e | 1408 | return -EINVAL; |
c5ebc440 | 1409 | } |
8ed66f0e JL |
1410 | |
1411 | if (data[IFLA_GENEVE_REMOTE]) { | |
c5ebc440 GM |
1412 | if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) { |
1413 | attrtype = IFLA_GENEVE_REMOTE; | |
1414 | goto change_notsup; | |
1415 | } | |
5b861f6b GM |
1416 | |
1417 | info->key.u.ipv4.dst = | |
8ed66f0e | 1418 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1419 | |
842841ec | 1420 | if (ipv4_is_multicast(info->key.u.ipv4.dst)) { |
c5ebc440 GM |
1421 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE], |
1422 | "Remote IPv4 address cannot be Multicast"); | |
9b4437a5 | 1423 | return -EINVAL; |
1424 | } | |
8ed66f0e JL |
1425 | } |
1426 | ||
1427 | if (data[IFLA_GENEVE_REMOTE6]) { | |
4c52a889 | 1428 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1429 | if (changelink && (ip_tunnel_info_af(info) == AF_INET)) { |
1430 | attrtype = IFLA_GENEVE_REMOTE6; | |
1431 | goto change_notsup; | |
1432 | } | |
5b861f6b GM |
1433 | |
1434 | info->mode = IP_TUNNEL_INFO_IPV6; | |
1435 | info->key.u.ipv6.dst = | |
8ed66f0e JL |
1436 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1437 | ||
5b861f6b | 1438 | if (ipv6_addr_type(&info->key.u.ipv6.dst) & |
8ed66f0e | 1439 | IPV6_ADDR_LINKLOCAL) { |
c5ebc440 GM |
1440 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1441 | "Remote IPv6 address cannot be link-local"); | |
8ed66f0e JL |
1442 | return -EINVAL; |
1443 | } | |
5b861f6b | 1444 | if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) { |
c5ebc440 GM |
1445 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1446 | "Remote IPv6 address cannot be Multicast"); | |
9b4437a5 | 1447 | return -EINVAL; |
1448 | } | |
5b861f6b | 1449 | info->key.tun_flags |= TUNNEL_CSUM; |
9e06e859 | 1450 | cfg->use_udp6_rx_checksums = true; |
9b4437a5 | 1451 | #else |
c5ebc440 GM |
1452 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1453 | "IPv6 support not enabled in the kernel"); | |
9b4437a5 | 1454 | return -EPFNOSUPPORT; |
1455 | #endif | |
8ed66f0e JL |
1456 | } |
1457 | ||
9b4437a5 | 1458 | if (data[IFLA_GENEVE_ID]) { |
1459 | __u32 vni; | |
1460 | __u8 tvni[3]; | |
5b861f6b | 1461 | __be64 tunid; |
9b4437a5 | 1462 | |
e277de5f | 1463 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1464 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1465 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1466 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1467 | |
5b861f6b | 1468 | tunid = vni_to_tunnel_id(tvni); |
c5ebc440 GM |
1469 | if (changelink && (tunid != info->key.tun_id)) { |
1470 | attrtype = IFLA_GENEVE_ID; | |
1471 | goto change_notsup; | |
1472 | } | |
5b861f6b | 1473 | info->key.tun_id = tunid; |
9b4437a5 | 1474 | } |
5b861f6b | 1475 | |
a97d97ba HL |
1476 | if (data[IFLA_GENEVE_TTL_INHERIT]) { |
1477 | if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT])) | |
9e06e859 | 1478 | cfg->ttl_inherit = true; |
a97d97ba | 1479 | else |
9e06e859 | 1480 | cfg->ttl_inherit = false; |
a97d97ba | 1481 | } else if (data[IFLA_GENEVE_TTL]) { |
5b861f6b | 1482 | info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
9e06e859 | 1483 | cfg->ttl_inherit = false; |
a97d97ba | 1484 | } |
52d0d404 | 1485 | |
d8951125 | 1486 | if (data[IFLA_GENEVE_TOS]) |
5b861f6b | 1487 | info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1488 | |
a025fb5f | 1489 | if (data[IFLA_GENEVE_DF]) |
9e06e859 | 1490 | cfg->df = nla_get_u8(data[IFLA_GENEVE_DF]); |
a025fb5f | 1491 | |
9b4437a5 | 1492 | if (data[IFLA_GENEVE_LABEL]) { |
5b861f6b | 1493 | info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & |
9b4437a5 | 1494 | IPV6_FLOWLABEL_MASK; |
c5ebc440 GM |
1495 | if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) { |
1496 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL], | |
1497 | "Label attribute only applies for IPv6 Geneve devices"); | |
9b4437a5 | 1498 | return -EINVAL; |
c5ebc440 | 1499 | } |
9b4437a5 | 1500 | } |
8eb3b995 | 1501 | |
5b861f6b | 1502 | if (data[IFLA_GENEVE_PORT]) { |
c5ebc440 GM |
1503 | if (changelink) { |
1504 | attrtype = IFLA_GENEVE_PORT; | |
1505 | goto change_notsup; | |
1506 | } | |
5b861f6b GM |
1507 | info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
1508 | } | |
2d07dc79 | 1509 | |
5b861f6b | 1510 | if (data[IFLA_GENEVE_COLLECT_METADATA]) { |
c5ebc440 GM |
1511 | if (changelink) { |
1512 | attrtype = IFLA_GENEVE_COLLECT_METADATA; | |
1513 | goto change_notsup; | |
1514 | } | |
9e06e859 | 1515 | cfg->collect_md = true; |
5b861f6b | 1516 | } |
2d07dc79 | 1517 | |
5b861f6b | 1518 | if (data[IFLA_GENEVE_UDP_CSUM]) { |
c5ebc440 GM |
1519 | if (changelink) { |
1520 | attrtype = IFLA_GENEVE_UDP_CSUM; | |
1521 | goto change_notsup; | |
1522 | } | |
5b861f6b GM |
1523 | if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1524 | info->key.tun_flags |= TUNNEL_CSUM; | |
1525 | } | |
abe492b4 | 1526 | |
5b861f6b | 1527 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { |
f9094b76 | 1528 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1529 | if (changelink) { |
1530 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX; | |
1531 | goto change_notsup; | |
1532 | } | |
5b861f6b GM |
1533 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) |
1534 | info->key.tun_flags &= ~TUNNEL_CSUM; | |
f9094b76 HL |
1535 | #else |
1536 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX], | |
1537 | "IPv6 support not enabled in the kernel"); | |
1538 | return -EPFNOSUPPORT; | |
1539 | #endif | |
5b861f6b | 1540 | } |
abe492b4 | 1541 | |
5b861f6b | 1542 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { |
f9094b76 | 1543 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1544 | if (changelink) { |
1545 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX; | |
1546 | goto change_notsup; | |
1547 | } | |
5b861f6b | 1548 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) |
9e06e859 | 1549 | cfg->use_udp6_rx_checksums = false; |
f9094b76 HL |
1550 | #else |
1551 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX], | |
1552 | "IPv6 support not enabled in the kernel"); | |
1553 | return -EPFNOSUPPORT; | |
1554 | #endif | |
5b861f6b GM |
1555 | } |
1556 | ||
1557 | return 0; | |
c5ebc440 GM |
1558 | change_notsup: |
1559 | NL_SET_ERR_MSG_ATTR(extack, data[attrtype], | |
1560 | "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported"); | |
1561 | return -EOPNOTSUPP; | |
5b861f6b GM |
1562 | } |
1563 | ||
c40e89fd AK |
1564 | static void geneve_link_config(struct net_device *dev, |
1565 | struct ip_tunnel_info *info, struct nlattr *tb[]) | |
1566 | { | |
1567 | struct geneve_dev *geneve = netdev_priv(dev); | |
1568 | int ldev_mtu = 0; | |
1569 | ||
1570 | if (tb[IFLA_MTU]) { | |
1571 | geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1572 | return; | |
1573 | } | |
1574 | ||
1575 | switch (ip_tunnel_info_af(info)) { | |
1576 | case AF_INET: { | |
1577 | struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst }; | |
1578 | struct rtable *rt = ip_route_output_key(geneve->net, &fl4); | |
1579 | ||
1580 | if (!IS_ERR(rt) && rt->dst.dev) { | |
1581 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN; | |
1582 | ip_rt_put(rt); | |
1583 | } | |
1584 | break; | |
1585 | } | |
1586 | #if IS_ENABLED(CONFIG_IPV6) | |
1587 | case AF_INET6: { | |
c0a47e44 HL |
1588 | struct rt6_info *rt; |
1589 | ||
1590 | if (!__in6_dev_get(dev)) | |
1591 | break; | |
1592 | ||
1593 | rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0, | |
1594 | NULL, 0); | |
c40e89fd AK |
1595 | |
1596 | if (rt && rt->dst.dev) | |
1597 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN; | |
1598 | ip6_rt_put(rt); | |
1599 | break; | |
1600 | } | |
1601 | #endif | |
1602 | } | |
1603 | ||
1604 | if (ldev_mtu <= 0) | |
1605 | return; | |
1606 | ||
1607 | geneve_change_mtu(dev, ldev_mtu - info->options_len); | |
1608 | } | |
1609 | ||
5b861f6b GM |
1610 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1611 | struct nlattr *tb[], struct nlattr *data[], | |
1612 | struct netlink_ext_ack *extack) | |
1613 | { | |
9e06e859 SD |
1614 | struct geneve_config cfg = { |
1615 | .df = GENEVE_DF_UNSET, | |
1616 | .use_udp6_rx_checksums = false, | |
1617 | .ttl_inherit = false, | |
1618 | .collect_md = false, | |
1619 | }; | |
5b861f6b GM |
1620 | int err; |
1621 | ||
9e06e859 SD |
1622 | init_tnl_info(&cfg.info, GENEVE_UDP_PORT); |
1623 | err = geneve_nl2info(tb, data, extack, &cfg, false); | |
5b861f6b GM |
1624 | if (err) |
1625 | return err; | |
abe492b4 | 1626 | |
9e06e859 | 1627 | err = geneve_configure(net, dev, extack, &cfg); |
c40e89fd AK |
1628 | if (err) |
1629 | return err; | |
1630 | ||
9e06e859 | 1631 | geneve_link_config(dev, &cfg.info, tb); |
c40e89fd AK |
1632 | |
1633 | return 0; | |
2d07dc79 JL |
1634 | } |
1635 | ||
5b861f6b GM |
1636 | /* Quiesces the geneve device data path for both TX and RX. |
1637 | * | |
1638 | * On transmit geneve checks for non-NULL geneve_sock before it proceeds. | |
1639 | * So, if we set that socket to NULL under RCU and wait for synchronize_net() | |
1640 | * to complete for the existing set of in-flight packets to be transmitted, | |
1641 | * then we would have quiesced the transmit data path. All the future packets | |
1642 | * will get dropped until we unquiesce the data path. | |
1643 | * | |
1644 | * On receive geneve dereference the geneve_sock stashed in the socket. So, | |
1645 | * if we set that to NULL under RCU and wait for synchronize_net() to | |
1646 | * complete, then we would have quiesced the receive data path. | |
1647 | */ | |
1648 | static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4, | |
1649 | struct geneve_sock **gs6) | |
1650 | { | |
1651 | *gs4 = rtnl_dereference(geneve->sock4); | |
1652 | rcu_assign_pointer(geneve->sock4, NULL); | |
1653 | if (*gs4) | |
1654 | rcu_assign_sk_user_data((*gs4)->sock->sk, NULL); | |
1655 | #if IS_ENABLED(CONFIG_IPV6) | |
1656 | *gs6 = rtnl_dereference(geneve->sock6); | |
1657 | rcu_assign_pointer(geneve->sock6, NULL); | |
1658 | if (*gs6) | |
1659 | rcu_assign_sk_user_data((*gs6)->sock->sk, NULL); | |
1660 | #else | |
1661 | *gs6 = NULL; | |
1662 | #endif | |
1663 | synchronize_net(); | |
1664 | } | |
1665 | ||
1666 | /* Resumes the geneve device data path for both TX and RX. */ | |
1667 | static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4, | |
1668 | struct geneve_sock __maybe_unused *gs6) | |
1669 | { | |
1670 | rcu_assign_pointer(geneve->sock4, gs4); | |
1671 | if (gs4) | |
1672 | rcu_assign_sk_user_data(gs4->sock->sk, gs4); | |
1673 | #if IS_ENABLED(CONFIG_IPV6) | |
1674 | rcu_assign_pointer(geneve->sock6, gs6); | |
1675 | if (gs6) | |
1676 | rcu_assign_sk_user_data(gs6->sock->sk, gs6); | |
1677 | #endif | |
1678 | synchronize_net(); | |
1679 | } | |
1680 | ||
1681 | static int geneve_changelink(struct net_device *dev, struct nlattr *tb[], | |
1682 | struct nlattr *data[], | |
1683 | struct netlink_ext_ack *extack) | |
1684 | { | |
1685 | struct geneve_dev *geneve = netdev_priv(dev); | |
1686 | struct geneve_sock *gs4, *gs6; | |
9e06e859 | 1687 | struct geneve_config cfg; |
5b861f6b GM |
1688 | int err; |
1689 | ||
1690 | /* If the geneve device is configured for metadata (or externally | |
1691 | * controlled, for example, OVS), then nothing can be changed. | |
1692 | */ | |
9e06e859 | 1693 | if (geneve->cfg.collect_md) |
5b861f6b GM |
1694 | return -EOPNOTSUPP; |
1695 | ||
1696 | /* Start with the existing info. */ | |
9e06e859 SD |
1697 | memcpy(&cfg, &geneve->cfg, sizeof(cfg)); |
1698 | err = geneve_nl2info(tb, data, extack, &cfg, true); | |
5b861f6b GM |
1699 | if (err) |
1700 | return err; | |
1701 | ||
9e06e859 SD |
1702 | if (!geneve_dst_addr_equal(&geneve->cfg.info, &cfg.info)) { |
1703 | dst_cache_reset(&cfg.info.dst_cache); | |
1704 | geneve_link_config(dev, &cfg.info, tb); | |
c40e89fd | 1705 | } |
5b861f6b GM |
1706 | |
1707 | geneve_quiesce(geneve, &gs4, &gs6); | |
9e06e859 | 1708 | memcpy(&geneve->cfg, &cfg, sizeof(cfg)); |
5b861f6b GM |
1709 | geneve_unquiesce(geneve, gs4, gs6); |
1710 | ||
1711 | return 0; | |
1712 | } | |
1713 | ||
2d07dc79 JL |
1714 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
1715 | { | |
1716 | struct geneve_dev *geneve = netdev_priv(dev); | |
1717 | ||
2d07dc79 JL |
1718 | list_del(&geneve->next); |
1719 | unregister_netdevice_queue(dev, head); | |
1720 | } | |
1721 | ||
1722 | static size_t geneve_get_size(const struct net_device *dev) | |
1723 | { | |
1724 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1725 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1726 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1727 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
a025fb5f | 1728 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */ |
8eb3b995 | 1729 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1730 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1731 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1732 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1733 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1734 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
52d0d404 | 1735 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ |
2d07dc79 JL |
1736 | 0; |
1737 | } | |
1738 | ||
1739 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1740 | { | |
1741 | struct geneve_dev *geneve = netdev_priv(dev); | |
9e06e859 SD |
1742 | struct ip_tunnel_info *info = &geneve->cfg.info; |
1743 | bool ttl_inherit = geneve->cfg.ttl_inherit; | |
1744 | bool metadata = geneve->cfg.collect_md; | |
9b4437a5 | 1745 | __u8 tmp_vni[3]; |
2d07dc79 JL |
1746 | __u32 vni; |
1747 | ||
9b4437a5 | 1748 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1749 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1750 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1751 | goto nla_put_failure; | |
1752 | ||
fd7eafd0 | 1753 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1754 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1755 | info->key.u.ipv4.dst)) |
1756 | goto nla_put_failure; | |
9b4437a5 | 1757 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1758 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1759 | goto nla_put_failure; |
9b4437a5 | 1760 | |
8ed66f0e | 1761 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1762 | } else if (!metadata) { |
8ed66f0e | 1763 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, |
9b4437a5 | 1764 | &info->key.u.ipv6.dst)) |
1765 | goto nla_put_failure; | |
9b4437a5 | 1766 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1767 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1768 | goto nla_put_failure; | |
11387fe4 | 1769 | #endif |
fd7eafd0 | 1770 | } |
2d07dc79 | 1771 | |
9b4437a5 | 1772 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1773 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1774 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1775 | goto nla_put_failure; |
1776 | ||
9e06e859 | 1777 | if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->cfg.df)) |
a025fb5f SB |
1778 | goto nla_put_failure; |
1779 | ||
9b4437a5 | 1780 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1781 | goto nla_put_failure; |
1782 | ||
fd7eafd0 | 1783 | if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
f9094b76 | 1784 | goto nla_put_failure; |
fd7eafd0 | 1785 | |
f9094b76 | 1786 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1787 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, |
9e06e859 | 1788 | !geneve->cfg.use_udp6_rx_checksums)) |
fd7eafd0 | 1789 | goto nla_put_failure; |
f9094b76 | 1790 | #endif |
fd7eafd0 | 1791 | |
52d0d404 HL |
1792 | if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) |
1793 | goto nla_put_failure; | |
1794 | ||
2d07dc79 JL |
1795 | return 0; |
1796 | ||
1797 | nla_put_failure: | |
1798 | return -EMSGSIZE; | |
1799 | } | |
1800 | ||
1801 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1802 | .kind = "geneve", | |
1803 | .maxtype = IFLA_GENEVE_MAX, | |
1804 | .policy = geneve_policy, | |
1805 | .priv_size = sizeof(struct geneve_dev), | |
1806 | .setup = geneve_setup, | |
1807 | .validate = geneve_validate, | |
1808 | .newlink = geneve_newlink, | |
5b861f6b | 1809 | .changelink = geneve_changelink, |
2d07dc79 JL |
1810 | .dellink = geneve_dellink, |
1811 | .get_size = geneve_get_size, | |
1812 | .fill_info = geneve_fill_info, | |
1813 | }; | |
1814 | ||
e305ac6c PS |
1815 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1816 | u8 name_assign_type, u16 dst_port) | |
1817 | { | |
1818 | struct nlattr *tb[IFLA_MAX + 1]; | |
1819 | struct net_device *dev; | |
106da663 | 1820 | LIST_HEAD(list_kill); |
e305ac6c | 1821 | int err; |
9e06e859 SD |
1822 | struct geneve_config cfg = { |
1823 | .df = GENEVE_DF_UNSET, | |
1824 | .use_udp6_rx_checksums = true, | |
1825 | .ttl_inherit = false, | |
1826 | .collect_md = true, | |
1827 | }; | |
e305ac6c PS |
1828 | |
1829 | memset(tb, 0, sizeof(tb)); | |
1830 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 1831 | &geneve_link_ops, tb, NULL); |
e305ac6c PS |
1832 | if (IS_ERR(dev)) |
1833 | return dev; | |
1834 | ||
9e06e859 SD |
1835 | init_tnl_info(&cfg.info, dst_port); |
1836 | err = geneve_configure(net, dev, NULL, &cfg); | |
106da663 ND |
1837 | if (err) { |
1838 | free_netdev(dev); | |
1839 | return ERR_PTR(err); | |
1840 | } | |
7e059158 DW |
1841 | |
1842 | /* openvswitch users expect packet sizes to be unrestricted, | |
1843 | * so set the largest MTU we can. | |
1844 | */ | |
91572088 | 1845 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1846 | if (err) |
1847 | goto err; | |
1848 | ||
41009481 ND |
1849 | err = rtnl_configure_link(dev, NULL); |
1850 | if (err < 0) | |
1851 | goto err; | |
1852 | ||
e305ac6c | 1853 | return dev; |
9b4437a5 | 1854 | err: |
106da663 ND |
1855 | geneve_dellink(dev, &list_kill); |
1856 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1857 | return ERR_PTR(err); |
e305ac6c PS |
1858 | } |
1859 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1860 | ||
681e683f HFS |
1861 | static int geneve_netdevice_event(struct notifier_block *unused, |
1862 | unsigned long event, void *ptr) | |
1863 | { | |
1864 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1865 | ||
2d2b13fc | 1866 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || |
04584957 | 1867 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { |
2d2b13fc | 1868 | geneve_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 | 1869 | } else if (event == NETDEV_UNREGISTER) { |
cc4e3835 JK |
1870 | if (!dev->udp_tunnel_nic_info) |
1871 | geneve_offload_rx_ports(dev, false); | |
04584957 | 1872 | } else if (event == NETDEV_REGISTER) { |
cc4e3835 JK |
1873 | if (!dev->udp_tunnel_nic_info) |
1874 | geneve_offload_rx_ports(dev, true); | |
04584957 | 1875 | } |
681e683f HFS |
1876 | |
1877 | return NOTIFY_DONE; | |
1878 | } | |
1879 | ||
1880 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1881 | .notifier_call = geneve_netdevice_event, | |
1882 | }; | |
1883 | ||
2d07dc79 JL |
1884 | static __net_init int geneve_init_net(struct net *net) |
1885 | { | |
1886 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1887 | |
1888 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1889 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1890 | return 0; |
1891 | } | |
1892 | ||
2843a253 | 1893 | static void geneve_destroy_tunnels(struct net *net, struct list_head *head) |
2d07dc79 JL |
1894 | { |
1895 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1896 | struct geneve_dev *geneve, *next; | |
1897 | struct net_device *dev, *aux; | |
2d07dc79 JL |
1898 | |
1899 | /* gather any geneve devices that were moved into this ns */ | |
1900 | for_each_netdev_safe(net, dev, aux) | |
1901 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
2843a253 | 1902 | unregister_netdevice_queue(dev, head); |
2d07dc79 JL |
1903 | |
1904 | /* now gather any other geneve devices that were created in this ns */ | |
1905 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1906 | /* If geneve->dev is in the same netns, it was already added | |
1907 | * to the list by the previous loop. | |
1908 | */ | |
1909 | if (!net_eq(dev_net(geneve->dev), net)) | |
2843a253 | 1910 | unregister_netdevice_queue(geneve->dev, head); |
2d07dc79 | 1911 | } |
2843a253 HY |
1912 | } |
1913 | ||
1914 | static void __net_exit geneve_exit_batch_net(struct list_head *net_list) | |
1915 | { | |
1916 | struct net *net; | |
1917 | LIST_HEAD(list); | |
1918 | ||
1919 | rtnl_lock(); | |
1920 | list_for_each_entry(net, net_list, exit_list) | |
1921 | geneve_destroy_tunnels(net, &list); | |
1922 | ||
2d07dc79 JL |
1923 | /* unregister the devices gathered above */ |
1924 | unregister_netdevice_many(&list); | |
1925 | rtnl_unlock(); | |
0fda7600 FW |
1926 | |
1927 | list_for_each_entry(net, net_list, exit_list) { | |
1928 | const struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1929 | ||
1930 | WARN_ON_ONCE(!list_empty(&gn->sock_list)); | |
1931 | } | |
2d07dc79 JL |
1932 | } |
1933 | ||
1934 | static struct pernet_operations geneve_net_ops = { | |
1935 | .init = geneve_init_net, | |
2843a253 | 1936 | .exit_batch = geneve_exit_batch_net, |
2d07dc79 JL |
1937 | .id = &geneve_net_id, |
1938 | .size = sizeof(struct geneve_net), | |
1939 | }; | |
1940 | ||
1941 | static int __init geneve_init_module(void) | |
1942 | { | |
1943 | int rc; | |
1944 | ||
1945 | rc = register_pernet_subsys(&geneve_net_ops); | |
1946 | if (rc) | |
1947 | goto out1; | |
1948 | ||
681e683f | 1949 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1950 | if (rc) |
1951 | goto out2; | |
1952 | ||
681e683f HFS |
1953 | rc = rtnl_link_register(&geneve_link_ops); |
1954 | if (rc) | |
1955 | goto out3; | |
1956 | ||
2d07dc79 | 1957 | return 0; |
681e683f HFS |
1958 | out3: |
1959 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1960 | out2: |
1961 | unregister_pernet_subsys(&geneve_net_ops); | |
1962 | out1: | |
1963 | return rc; | |
1964 | } | |
1965 | late_initcall(geneve_init_module); | |
1966 | ||
1967 | static void __exit geneve_cleanup_module(void) | |
1968 | { | |
1969 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1970 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1971 | unregister_pernet_subsys(&geneve_net_ops); |
1972 | } | |
1973 | module_exit(geneve_cleanup_module); | |
1974 | ||
1975 | MODULE_LICENSE("GPL"); | |
1976 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1977 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1978 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1979 | MODULE_ALIAS_RTNL_LINK("geneve"); |