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 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
2d07dc79 JL |
12 | #include <linux/etherdevice.h> |
13 | #include <linux/hash.h> | |
3616d08b | 14 | #include <net/ipv6_stubs.h> |
e305ac6c | 15 | #include <net/dst_metadata.h> |
8e816df8 | 16 | #include <net/gro_cells.h> |
2d07dc79 JL |
17 | #include <net/rtnetlink.h> |
18 | #include <net/geneve.h> | |
371bd106 | 19 | #include <net/protocol.h> |
2d07dc79 JL |
20 | |
21 | #define GENEVE_NETDEV_VER "0.6" | |
22 | ||
2d07dc79 JL |
23 | #define GENEVE_N_VID (1u << 24) |
24 | #define GENEVE_VID_MASK (GENEVE_N_VID - 1) | |
25 | ||
26 | #define VNI_HASH_BITS 10 | |
27 | #define VNI_HASH_SIZE (1<<VNI_HASH_BITS) | |
28 | ||
29 | static bool log_ecn_error = true; | |
30 | module_param(log_ecn_error, bool, 0644); | |
31 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); | |
32 | ||
371bd106 PS |
33 | #define GENEVE_VER 0 |
34 | #define GENEVE_BASE_HLEN (sizeof(struct udphdr) + sizeof(struct genevehdr)) | |
5edbea69 AK |
35 | #define GENEVE_IPV4_HLEN (ETH_HLEN + sizeof(struct iphdr) + GENEVE_BASE_HLEN) |
36 | #define GENEVE_IPV6_HLEN (ETH_HLEN + sizeof(struct ipv6hdr) + GENEVE_BASE_HLEN) | |
371bd106 | 37 | |
2d07dc79 JL |
38 | /* per-network namespace private data for this module */ |
39 | struct geneve_net { | |
371bd106 | 40 | struct list_head geneve_list; |
371bd106 | 41 | struct list_head sock_list; |
2d07dc79 JL |
42 | }; |
43 | ||
c7d03a00 | 44 | static unsigned int geneve_net_id; |
371bd106 | 45 | |
4b4c21fa JB |
46 | struct geneve_dev_node { |
47 | struct hlist_node hlist; | |
48 | struct geneve_dev *geneve; | |
49 | }; | |
50 | ||
2d07dc79 JL |
51 | /* Pseudo network device */ |
52 | struct geneve_dev { | |
4b4c21fa JB |
53 | struct geneve_dev_node hlist4; /* vni hash table for IPv4 socket */ |
54 | #if IS_ENABLED(CONFIG_IPV6) | |
55 | struct geneve_dev_node hlist6; /* vni hash table for IPv6 socket */ | |
56 | #endif | |
2d07dc79 JL |
57 | struct net *net; /* netns for packet i/o */ |
58 | struct net_device *dev; /* netdev for geneve tunnel */ | |
9b4437a5 | 59 | struct ip_tunnel_info info; |
fceb9c3e | 60 | struct geneve_sock __rcu *sock4; /* IPv4 socket used for geneve tunnel */ |
8ed66f0e | 61 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 62 | struct geneve_sock __rcu *sock6; /* IPv6 socket used for geneve tunnel */ |
8ed66f0e | 63 | #endif |
2d07dc79 | 64 | struct list_head next; /* geneve's per namespace list */ |
8e816df8 | 65 | struct gro_cells gro_cells; |
9b4437a5 | 66 | bool collect_md; |
67 | bool use_udp6_rx_checksums; | |
52d0d404 | 68 | bool ttl_inherit; |
a025fb5f | 69 | enum ifla_geneve_df df; |
2d07dc79 JL |
70 | }; |
71 | ||
371bd106 PS |
72 | struct geneve_sock { |
73 | bool collect_md; | |
371bd106 PS |
74 | struct list_head list; |
75 | struct socket *sock; | |
76 | struct rcu_head rcu; | |
77 | int refcnt; | |
66d47003 | 78 | struct hlist_head vni_list[VNI_HASH_SIZE]; |
371bd106 | 79 | }; |
2d07dc79 JL |
80 | |
81 | static inline __u32 geneve_net_vni_hash(u8 vni[3]) | |
82 | { | |
83 | __u32 vnid; | |
84 | ||
85 | vnid = (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
86 | return hash_32(vnid, VNI_HASH_BITS); | |
87 | } | |
88 | ||
e305ac6c PS |
89 | static __be64 vni_to_tunnel_id(const __u8 *vni) |
90 | { | |
91 | #ifdef __BIG_ENDIAN | |
92 | return (vni[0] << 16) | (vni[1] << 8) | vni[2]; | |
93 | #else | |
94 | return (__force __be64)(((__force u64)vni[0] << 40) | | |
95 | ((__force u64)vni[1] << 48) | | |
96 | ((__force u64)vni[2] << 56)); | |
97 | #endif | |
98 | } | |
99 | ||
9b4437a5 | 100 | /* Convert 64 bit tunnel ID to 24 bit VNI. */ |
101 | static void tunnel_id_to_vni(__be64 tun_id, __u8 *vni) | |
102 | { | |
103 | #ifdef __BIG_ENDIAN | |
104 | vni[0] = (__force __u8)(tun_id >> 16); | |
105 | vni[1] = (__force __u8)(tun_id >> 8); | |
106 | vni[2] = (__force __u8)tun_id; | |
107 | #else | |
108 | vni[0] = (__force __u8)((__force u64)tun_id >> 40); | |
109 | vni[1] = (__force __u8)((__force u64)tun_id >> 48); | |
110 | vni[2] = (__force __u8)((__force u64)tun_id >> 56); | |
111 | #endif | |
112 | } | |
113 | ||
2e0b26e1 | 114 | static bool eq_tun_id_and_vni(u8 *tun_id, u8 *vni) |
115 | { | |
2e0b26e1 | 116 | return !memcmp(vni, &tun_id[5], 3); |
2e0b26e1 | 117 | } |
118 | ||
1e9f12ec JB |
119 | static sa_family_t geneve_get_sk_family(struct geneve_sock *gs) |
120 | { | |
121 | return gs->sock->sk->sk_family; | |
122 | } | |
123 | ||
66d47003 | 124 | static struct geneve_dev *geneve_lookup(struct geneve_sock *gs, |
371bd106 | 125 | __be32 addr, u8 vni[]) |
2d07dc79 | 126 | { |
2d07dc79 | 127 | struct hlist_head *vni_list_head; |
4b4c21fa | 128 | struct geneve_dev_node *node; |
2d07dc79 JL |
129 | __u32 hash; |
130 | ||
2d07dc79 | 131 | /* Find the device for this VNI */ |
371bd106 | 132 | hash = geneve_net_vni_hash(vni); |
66d47003 | 133 | vni_list_head = &gs->vni_list[hash]; |
4b4c21fa JB |
134 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
135 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
136 | addr == node->geneve->info.key.u.ipv4.dst) | |
137 | return node->geneve; | |
8ed66f0e JL |
138 | } |
139 | return NULL; | |
140 | } | |
141 | ||
142 | #if IS_ENABLED(CONFIG_IPV6) | |
143 | static struct geneve_dev *geneve6_lookup(struct geneve_sock *gs, | |
144 | struct in6_addr addr6, u8 vni[]) | |
145 | { | |
146 | struct hlist_head *vni_list_head; | |
4b4c21fa | 147 | struct geneve_dev_node *node; |
8ed66f0e JL |
148 | __u32 hash; |
149 | ||
150 | /* Find the device for this VNI */ | |
151 | hash = geneve_net_vni_hash(vni); | |
152 | vni_list_head = &gs->vni_list[hash]; | |
4b4c21fa JB |
153 | hlist_for_each_entry_rcu(node, vni_list_head, hlist) { |
154 | if (eq_tun_id_and_vni((u8 *)&node->geneve->info.key.tun_id, vni) && | |
155 | ipv6_addr_equal(&addr6, &node->geneve->info.key.u.ipv6.dst)) | |
156 | return node->geneve; | |
2d07dc79 | 157 | } |
e305ac6c PS |
158 | return NULL; |
159 | } | |
8ed66f0e | 160 | #endif |
e305ac6c | 161 | |
371bd106 PS |
162 | static inline struct genevehdr *geneve_hdr(const struct sk_buff *skb) |
163 | { | |
164 | return (struct genevehdr *)(udp_hdr(skb) + 1); | |
165 | } | |
166 | ||
9fc47545 JB |
167 | static struct geneve_dev *geneve_lookup_skb(struct geneve_sock *gs, |
168 | struct sk_buff *skb) | |
e305ac6c | 169 | { |
8ed66f0e | 170 | static u8 zero_vni[3]; |
9b4437a5 | 171 | u8 *vni; |
e305ac6c | 172 | |
1e9f12ec | 173 | if (geneve_get_sk_family(gs) == AF_INET) { |
9fc47545 | 174 | struct iphdr *iph; |
9b4437a5 | 175 | __be32 addr; |
9fc47545 | 176 | |
8ed66f0e | 177 | iph = ip_hdr(skb); /* outer IP header... */ |
371bd106 | 178 | |
8ed66f0e JL |
179 | if (gs->collect_md) { |
180 | vni = zero_vni; | |
181 | addr = 0; | |
182 | } else { | |
9fc47545 | 183 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
184 | addr = iph->saddr; |
185 | } | |
186 | ||
9fc47545 | 187 | return geneve_lookup(gs, addr, vni); |
8ed66f0e | 188 | #if IS_ENABLED(CONFIG_IPV6) |
1e9f12ec | 189 | } else if (geneve_get_sk_family(gs) == AF_INET6) { |
9b4437a5 | 190 | static struct in6_addr zero_addr6; |
9fc47545 JB |
191 | struct ipv6hdr *ip6h; |
192 | struct in6_addr addr6; | |
193 | ||
8ed66f0e | 194 | ip6h = ipv6_hdr(skb); /* outer IPv6 header... */ |
371bd106 | 195 | |
8ed66f0e JL |
196 | if (gs->collect_md) { |
197 | vni = zero_vni; | |
198 | addr6 = zero_addr6; | |
199 | } else { | |
9fc47545 | 200 | vni = geneve_hdr(skb)->vni; |
8ed66f0e JL |
201 | addr6 = ip6h->saddr; |
202 | } | |
203 | ||
9fc47545 | 204 | return geneve6_lookup(gs, addr6, vni); |
8ed66f0e JL |
205 | #endif |
206 | } | |
9fc47545 JB |
207 | return NULL; |
208 | } | |
209 | ||
210 | /* geneve receive/decap routine */ | |
211 | static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs, | |
212 | struct sk_buff *skb) | |
213 | { | |
214 | struct genevehdr *gnvh = geneve_hdr(skb); | |
215 | struct metadata_dst *tun_dst = NULL; | |
216 | struct pcpu_sw_netstats *stats; | |
fe741e23 | 217 | unsigned int len; |
9fc47545 JB |
218 | int err = 0; |
219 | void *oiph; | |
2d07dc79 | 220 | |
371bd106 | 221 | if (ip_tunnel_collect_metadata() || gs->collect_md) { |
e305ac6c | 222 | __be16 flags; |
e305ac6c PS |
223 | |
224 | flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT | | |
225 | (gnvh->oam ? TUNNEL_OAM : 0) | | |
226 | (gnvh->critical ? TUNNEL_CRIT_OPT : 0); | |
227 | ||
1e9f12ec | 228 | tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags, |
e305ac6c PS |
229 | vni_to_tunnel_id(gnvh->vni), |
230 | gnvh->opt_len * 4); | |
fe741e23 GM |
231 | if (!tun_dst) { |
232 | geneve->dev->stats.rx_dropped++; | |
e305ac6c | 233 | goto drop; |
fe741e23 | 234 | } |
e305ac6c | 235 | /* Update tunnel dst according to Geneve options. */ |
4c222798 | 236 | ip_tunnel_info_opts_set(&tun_dst->u.tun_info, |
256c87c1 PJV |
237 | gnvh->options, gnvh->opt_len * 4, |
238 | TUNNEL_GENEVE_OPT); | |
e305ac6c PS |
239 | } else { |
240 | /* Drop packets w/ critical options, | |
241 | * since we don't support any... | |
242 | */ | |
fe741e23 GM |
243 | if (gnvh->critical) { |
244 | geneve->dev->stats.rx_frame_errors++; | |
245 | geneve->dev->stats.rx_errors++; | |
e305ac6c | 246 | goto drop; |
fe741e23 | 247 | } |
e305ac6c | 248 | } |
2d07dc79 JL |
249 | |
250 | skb_reset_mac_header(skb); | |
2d07dc79 JL |
251 | skb->protocol = eth_type_trans(skb, geneve->dev); |
252 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); | |
253 | ||
e305ac6c PS |
254 | if (tun_dst) |
255 | skb_dst_set(skb, &tun_dst->dst); | |
256 | ||
2d07dc79 | 257 | /* Ignore packet loops (and multicast echo) */ |
fe741e23 GM |
258 | if (ether_addr_equal(eth_hdr(skb)->h_source, geneve->dev->dev_addr)) { |
259 | geneve->dev->stats.rx_errors++; | |
2d07dc79 | 260 | goto drop; |
fe741e23 | 261 | } |
2d07dc79 | 262 | |
9fc47545 | 263 | oiph = skb_network_header(skb); |
2d07dc79 JL |
264 | skb_reset_network_header(skb); |
265 | ||
9fc47545 JB |
266 | if (geneve_get_sk_family(gs) == AF_INET) |
267 | err = IP_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 268 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 JB |
269 | else |
270 | err = IP6_ECN_decapsulate(oiph, skb); | |
8ed66f0e | 271 | #endif |
2d07dc79 JL |
272 | |
273 | if (unlikely(err)) { | |
8ed66f0e | 274 | if (log_ecn_error) { |
9fc47545 | 275 | if (geneve_get_sk_family(gs) == AF_INET) |
8ed66f0e JL |
276 | net_info_ratelimited("non-ECT from %pI4 " |
277 | "with TOS=%#x\n", | |
9fc47545 JB |
278 | &((struct iphdr *)oiph)->saddr, |
279 | ((struct iphdr *)oiph)->tos); | |
8ed66f0e | 280 | #if IS_ENABLED(CONFIG_IPV6) |
9fc47545 | 281 | else |
8ed66f0e | 282 | net_info_ratelimited("non-ECT from %pI6\n", |
9fc47545 | 283 | &((struct ipv6hdr *)oiph)->saddr); |
8ed66f0e JL |
284 | #endif |
285 | } | |
2d07dc79 JL |
286 | if (err > 1) { |
287 | ++geneve->dev->stats.rx_frame_errors; | |
288 | ++geneve->dev->stats.rx_errors; | |
289 | goto drop; | |
290 | } | |
291 | } | |
292 | ||
fe741e23 GM |
293 | len = skb->len; |
294 | err = gro_cells_receive(&geneve->gro_cells, skb); | |
295 | if (likely(err == NET_RX_SUCCESS)) { | |
296 | stats = this_cpu_ptr(geneve->dev->tstats); | |
297 | u64_stats_update_begin(&stats->syncp); | |
298 | stats->rx_packets++; | |
299 | stats->rx_bytes += len; | |
300 | u64_stats_update_end(&stats->syncp); | |
301 | } | |
2d07dc79 JL |
302 | return; |
303 | drop: | |
304 | /* Consume bad packet */ | |
305 | kfree_skb(skb); | |
306 | } | |
307 | ||
308 | /* Setup stats when device is created */ | |
309 | static int geneve_init(struct net_device *dev) | |
310 | { | |
8e816df8 JG |
311 | struct geneve_dev *geneve = netdev_priv(dev); |
312 | int err; | |
313 | ||
2d07dc79 JL |
314 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
315 | if (!dev->tstats) | |
316 | return -ENOMEM; | |
8e816df8 JG |
317 | |
318 | err = gro_cells_init(&geneve->gro_cells, dev); | |
319 | if (err) { | |
320 | free_percpu(dev->tstats); | |
321 | return err; | |
322 | } | |
323 | ||
9b4437a5 | 324 | err = dst_cache_init(&geneve->info.dst_cache, GFP_KERNEL); |
468dfffc PA |
325 | if (err) { |
326 | free_percpu(dev->tstats); | |
327 | gro_cells_destroy(&geneve->gro_cells); | |
328 | return err; | |
329 | } | |
2d07dc79 JL |
330 | return 0; |
331 | } | |
332 | ||
333 | static void geneve_uninit(struct net_device *dev) | |
334 | { | |
8e816df8 JG |
335 | struct geneve_dev *geneve = netdev_priv(dev); |
336 | ||
9b4437a5 | 337 | dst_cache_destroy(&geneve->info.dst_cache); |
8e816df8 | 338 | gro_cells_destroy(&geneve->gro_cells); |
2d07dc79 JL |
339 | free_percpu(dev->tstats); |
340 | } | |
341 | ||
371bd106 PS |
342 | /* Callback from net/ipv4/udp.c to receive packets */ |
343 | static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb) | |
344 | { | |
345 | struct genevehdr *geneveh; | |
9fc47545 | 346 | struct geneve_dev *geneve; |
371bd106 PS |
347 | struct geneve_sock *gs; |
348 | int opts_len; | |
349 | ||
fe741e23 | 350 | /* Need UDP and Geneve header to be present */ |
371bd106 | 351 | if (unlikely(!pskb_may_pull(skb, GENEVE_BASE_HLEN))) |
e5aed006 | 352 | goto drop; |
371bd106 PS |
353 | |
354 | /* Return packets with reserved bits set */ | |
355 | geneveh = geneve_hdr(skb); | |
356 | if (unlikely(geneveh->ver != GENEVE_VER)) | |
e5aed006 | 357 | goto drop; |
371bd106 PS |
358 | |
359 | if (unlikely(geneveh->proto_type != htons(ETH_P_TEB))) | |
e5aed006 | 360 | goto drop; |
371bd106 | 361 | |
9fc47545 JB |
362 | gs = rcu_dereference_sk_user_data(sk); |
363 | if (!gs) | |
364 | goto drop; | |
365 | ||
366 | geneve = geneve_lookup_skb(gs, skb); | |
367 | if (!geneve) | |
368 | goto drop; | |
369 | ||
371bd106 PS |
370 | opts_len = geneveh->opt_len * 4; |
371 | if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, | |
7f290c94 | 372 | htons(ETH_P_TEB), |
fe741e23 GM |
373 | !net_eq(geneve->net, dev_net(geneve->dev)))) { |
374 | geneve->dev->stats.rx_dropped++; | |
371bd106 | 375 | goto drop; |
fe741e23 | 376 | } |
371bd106 | 377 | |
9fc47545 | 378 | geneve_rx(geneve, gs, skb); |
371bd106 PS |
379 | return 0; |
380 | ||
381 | drop: | |
382 | /* Consume bad packet */ | |
383 | kfree_skb(skb); | |
384 | return 0; | |
371bd106 PS |
385 | } |
386 | ||
a0796644 SB |
387 | /* Callback from net/ipv{4,6}/udp.c to check that we have a tunnel for errors */ |
388 | static int geneve_udp_encap_err_lookup(struct sock *sk, struct sk_buff *skb) | |
389 | { | |
390 | struct genevehdr *geneveh; | |
391 | struct geneve_sock *gs; | |
392 | u8 zero_vni[3] = { 0 }; | |
393 | u8 *vni = zero_vni; | |
394 | ||
eccc73a6 | 395 | if (!pskb_may_pull(skb, skb_transport_offset(skb) + GENEVE_BASE_HLEN)) |
a0796644 SB |
396 | return -EINVAL; |
397 | ||
398 | geneveh = geneve_hdr(skb); | |
399 | if (geneveh->ver != GENEVE_VER) | |
400 | return -EINVAL; | |
401 | ||
402 | if (geneveh->proto_type != htons(ETH_P_TEB)) | |
403 | return -EINVAL; | |
404 | ||
405 | gs = rcu_dereference_sk_user_data(sk); | |
406 | if (!gs) | |
407 | return -ENOENT; | |
408 | ||
409 | if (geneve_get_sk_family(gs) == AF_INET) { | |
410 | struct iphdr *iph = ip_hdr(skb); | |
411 | __be32 addr4 = 0; | |
412 | ||
413 | if (!gs->collect_md) { | |
414 | vni = geneve_hdr(skb)->vni; | |
415 | addr4 = iph->daddr; | |
416 | } | |
417 | ||
418 | return geneve_lookup(gs, addr4, vni) ? 0 : -ENOENT; | |
419 | } | |
420 | ||
421 | #if IS_ENABLED(CONFIG_IPV6) | |
422 | if (geneve_get_sk_family(gs) == AF_INET6) { | |
423 | struct ipv6hdr *ip6h = ipv6_hdr(skb); | |
8a962c4a NC |
424 | struct in6_addr addr6; |
425 | ||
426 | memset(&addr6, 0, sizeof(struct in6_addr)); | |
a0796644 SB |
427 | |
428 | if (!gs->collect_md) { | |
429 | vni = geneve_hdr(skb)->vni; | |
430 | addr6 = ip6h->daddr; | |
431 | } | |
432 | ||
433 | return geneve6_lookup(gs, addr6, vni) ? 0 : -ENOENT; | |
434 | } | |
435 | #endif | |
436 | ||
437 | return -EPFNOSUPPORT; | |
438 | } | |
439 | ||
371bd106 | 440 | static struct socket *geneve_create_sock(struct net *net, bool ipv6, |
9b4437a5 | 441 | __be16 port, bool ipv6_rx_csum) |
371bd106 PS |
442 | { |
443 | struct socket *sock; | |
444 | struct udp_port_cfg udp_conf; | |
445 | int err; | |
446 | ||
447 | memset(&udp_conf, 0, sizeof(udp_conf)); | |
448 | ||
449 | if (ipv6) { | |
450 | udp_conf.family = AF_INET6; | |
8ed66f0e | 451 | udp_conf.ipv6_v6only = 1; |
9b4437a5 | 452 | udp_conf.use_udp6_rx_checksums = ipv6_rx_csum; |
371bd106 PS |
453 | } else { |
454 | udp_conf.family = AF_INET; | |
455 | udp_conf.local_ip.s_addr = htonl(INADDR_ANY); | |
456 | } | |
457 | ||
458 | udp_conf.local_udp_port = port; | |
459 | ||
460 | /* Open UDP socket */ | |
461 | err = udp_sock_create(net, &udp_conf, &sock); | |
462 | if (err < 0) | |
463 | return ERR_PTR(err); | |
464 | ||
465 | return sock; | |
466 | } | |
467 | ||
371bd106 PS |
468 | static int geneve_hlen(struct genevehdr *gh) |
469 | { | |
470 | return sizeof(*gh) + gh->opt_len * 4; | |
471 | } | |
472 | ||
d4546c25 DM |
473 | static struct sk_buff *geneve_gro_receive(struct sock *sk, |
474 | struct list_head *head, | |
475 | struct sk_buff *skb) | |
371bd106 | 476 | { |
d4546c25 DM |
477 | struct sk_buff *pp = NULL; |
478 | struct sk_buff *p; | |
371bd106 PS |
479 | struct genevehdr *gh, *gh2; |
480 | unsigned int hlen, gh_len, off_gnv; | |
481 | const struct packet_offload *ptype; | |
482 | __be16 type; | |
483 | int flush = 1; | |
484 | ||
485 | off_gnv = skb_gro_offset(skb); | |
486 | hlen = off_gnv + sizeof(*gh); | |
487 | gh = skb_gro_header_fast(skb, off_gnv); | |
488 | if (skb_gro_header_hard(skb, hlen)) { | |
489 | gh = skb_gro_header_slow(skb, hlen, off_gnv); | |
490 | if (unlikely(!gh)) | |
491 | goto out; | |
492 | } | |
493 | ||
494 | if (gh->ver != GENEVE_VER || gh->oam) | |
495 | goto out; | |
496 | gh_len = geneve_hlen(gh); | |
497 | ||
498 | hlen = off_gnv + gh_len; | |
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 | ||
d4546c25 | 505 | list_for_each_entry(p, head, list) { |
371bd106 PS |
506 | if (!NAPI_GRO_CB(p)->same_flow) |
507 | continue; | |
508 | ||
509 | gh2 = (struct genevehdr *)(p->data + off_gnv); | |
510 | if (gh->opt_len != gh2->opt_len || | |
511 | memcmp(gh, gh2, gh_len)) { | |
512 | NAPI_GRO_CB(p)->same_flow = 0; | |
513 | continue; | |
514 | } | |
515 | } | |
516 | ||
517 | type = gh->proto_type; | |
518 | ||
519 | rcu_read_lock(); | |
520 | ptype = gro_find_receive_by_type(type); | |
c194cf93 | 521 | if (!ptype) |
371bd106 | 522 | goto out_unlock; |
371bd106 PS |
523 | |
524 | skb_gro_pull(skb, gh_len); | |
525 | skb_gro_postpull_rcsum(skb, gh, gh_len); | |
fcd91dd4 | 526 | pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); |
c194cf93 | 527 | flush = 0; |
371bd106 PS |
528 | |
529 | out_unlock: | |
530 | rcu_read_unlock(); | |
531 | out: | |
603d4cf8 | 532 | skb_gro_flush_final(skb, pp, flush); |
371bd106 PS |
533 | |
534 | return pp; | |
535 | } | |
536 | ||
4a0090a9 TH |
537 | static int geneve_gro_complete(struct sock *sk, struct sk_buff *skb, |
538 | int nhoff) | |
371bd106 PS |
539 | { |
540 | struct genevehdr *gh; | |
541 | struct packet_offload *ptype; | |
542 | __be16 type; | |
543 | int gh_len; | |
544 | int err = -ENOSYS; | |
545 | ||
371bd106 PS |
546 | gh = (struct genevehdr *)(skb->data + nhoff); |
547 | gh_len = geneve_hlen(gh); | |
548 | type = gh->proto_type; | |
549 | ||
550 | rcu_read_lock(); | |
551 | ptype = gro_find_complete_by_type(type); | |
552 | if (ptype) | |
553 | err = ptype->callbacks.gro_complete(skb, nhoff + gh_len); | |
554 | ||
555 | rcu_read_unlock(); | |
229740c6 JR |
556 | |
557 | skb_set_inner_mac_header(skb, nhoff + gh_len); | |
558 | ||
371bd106 PS |
559 | return err; |
560 | } | |
561 | ||
562 | /* Create new listen socket if needed */ | |
563 | static struct geneve_sock *geneve_socket_create(struct net *net, __be16 port, | |
9b4437a5 | 564 | bool ipv6, bool ipv6_rx_csum) |
371bd106 PS |
565 | { |
566 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
567 | struct geneve_sock *gs; | |
568 | struct socket *sock; | |
569 | struct udp_tunnel_sock_cfg tunnel_cfg; | |
66d47003 | 570 | int h; |
371bd106 PS |
571 | |
572 | gs = kzalloc(sizeof(*gs), GFP_KERNEL); | |
573 | if (!gs) | |
574 | return ERR_PTR(-ENOMEM); | |
575 | ||
9b4437a5 | 576 | sock = geneve_create_sock(net, ipv6, port, ipv6_rx_csum); |
371bd106 PS |
577 | if (IS_ERR(sock)) { |
578 | kfree(gs); | |
579 | return ERR_CAST(sock); | |
580 | } | |
581 | ||
582 | gs->sock = sock; | |
583 | gs->refcnt = 1; | |
66d47003 PS |
584 | for (h = 0; h < VNI_HASH_SIZE; ++h) |
585 | INIT_HLIST_HEAD(&gs->vni_list[h]); | |
371bd106 PS |
586 | |
587 | /* Initialize the geneve udp offloads structure */ | |
e7b3db5e | 588 | udp_tunnel_notify_add_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
589 | |
590 | /* Mark socket as an encapsulation socket */ | |
4a0090a9 | 591 | memset(&tunnel_cfg, 0, sizeof(tunnel_cfg)); |
371bd106 PS |
592 | tunnel_cfg.sk_user_data = gs; |
593 | tunnel_cfg.encap_type = 1; | |
4a0090a9 TH |
594 | tunnel_cfg.gro_receive = geneve_gro_receive; |
595 | tunnel_cfg.gro_complete = geneve_gro_complete; | |
371bd106 | 596 | tunnel_cfg.encap_rcv = geneve_udp_encap_recv; |
a0796644 | 597 | tunnel_cfg.encap_err_lookup = geneve_udp_encap_err_lookup; |
371bd106 PS |
598 | tunnel_cfg.encap_destroy = NULL; |
599 | setup_udp_tunnel_sock(net, sock, &tunnel_cfg); | |
371bd106 PS |
600 | list_add(&gs->list, &gn->sock_list); |
601 | return gs; | |
602 | } | |
603 | ||
8ed66f0e | 604 | static void __geneve_sock_release(struct geneve_sock *gs) |
371bd106 | 605 | { |
8ed66f0e | 606 | if (!gs || --gs->refcnt) |
371bd106 PS |
607 | return; |
608 | ||
609 | list_del(&gs->list); | |
e7b3db5e | 610 | udp_tunnel_notify_del_rx_port(gs->sock, UDP_TUNNEL_TYPE_GENEVE); |
371bd106 PS |
611 | udp_tunnel_sock_release(gs->sock); |
612 | kfree_rcu(gs, rcu); | |
613 | } | |
614 | ||
8ed66f0e JL |
615 | static void geneve_sock_release(struct geneve_dev *geneve) |
616 | { | |
fceb9c3e | 617 | struct geneve_sock *gs4 = rtnl_dereference(geneve->sock4); |
8ed66f0e | 618 | #if IS_ENABLED(CONFIG_IPV6) |
fceb9c3e | 619 | struct geneve_sock *gs6 = rtnl_dereference(geneve->sock6); |
620 | ||
621 | rcu_assign_pointer(geneve->sock6, NULL); | |
622 | #endif | |
623 | ||
624 | rcu_assign_pointer(geneve->sock4, NULL); | |
625 | synchronize_net(); | |
626 | ||
627 | __geneve_sock_release(gs4); | |
628 | #if IS_ENABLED(CONFIG_IPV6) | |
629 | __geneve_sock_release(gs6); | |
8ed66f0e JL |
630 | #endif |
631 | } | |
632 | ||
371bd106 | 633 | static struct geneve_sock *geneve_find_sock(struct geneve_net *gn, |
8ed66f0e | 634 | sa_family_t family, |
371bd106 PS |
635 | __be16 dst_port) |
636 | { | |
637 | struct geneve_sock *gs; | |
638 | ||
639 | list_for_each_entry(gs, &gn->sock_list, list) { | |
640 | if (inet_sk(gs->sock->sk)->inet_sport == dst_port && | |
1e9f12ec | 641 | geneve_get_sk_family(gs) == family) { |
371bd106 PS |
642 | return gs; |
643 | } | |
644 | } | |
645 | return NULL; | |
646 | } | |
647 | ||
8ed66f0e | 648 | static int geneve_sock_add(struct geneve_dev *geneve, bool ipv6) |
2d07dc79 | 649 | { |
2d07dc79 | 650 | struct net *net = geneve->net; |
371bd106 | 651 | struct geneve_net *gn = net_generic(net, geneve_net_id); |
4b4c21fa | 652 | struct geneve_dev_node *node; |
2d07dc79 | 653 | struct geneve_sock *gs; |
9b4437a5 | 654 | __u8 vni[3]; |
66d47003 | 655 | __u32 hash; |
2d07dc79 | 656 | |
9b4437a5 | 657 | gs = geneve_find_sock(gn, ipv6 ? AF_INET6 : AF_INET, geneve->info.key.tp_dst); |
371bd106 PS |
658 | if (gs) { |
659 | gs->refcnt++; | |
660 | goto out; | |
661 | } | |
662 | ||
9b4437a5 | 663 | gs = geneve_socket_create(net, geneve->info.key.tp_dst, ipv6, |
664 | geneve->use_udp6_rx_checksums); | |
2d07dc79 JL |
665 | if (IS_ERR(gs)) |
666 | return PTR_ERR(gs); | |
667 | ||
371bd106 PS |
668 | out: |
669 | gs->collect_md = geneve->collect_md; | |
8ed66f0e | 670 | #if IS_ENABLED(CONFIG_IPV6) |
4b4c21fa | 671 | if (ipv6) { |
fceb9c3e | 672 | rcu_assign_pointer(geneve->sock6, gs); |
4b4c21fa JB |
673 | node = &geneve->hlist6; |
674 | } else | |
8ed66f0e | 675 | #endif |
4b4c21fa | 676 | { |
fceb9c3e | 677 | rcu_assign_pointer(geneve->sock4, gs); |
4b4c21fa JB |
678 | node = &geneve->hlist4; |
679 | } | |
680 | node->geneve = geneve; | |
66d47003 | 681 | |
9b4437a5 | 682 | tunnel_id_to_vni(geneve->info.key.tun_id, vni); |
683 | hash = geneve_net_vni_hash(vni); | |
4b4c21fa | 684 | hlist_add_head_rcu(&node->hlist, &gs->vni_list[hash]); |
2d07dc79 JL |
685 | return 0; |
686 | } | |
687 | ||
8ed66f0e JL |
688 | static int geneve_open(struct net_device *dev) |
689 | { | |
690 | struct geneve_dev *geneve = netdev_priv(dev); | |
8ed66f0e | 691 | bool metadata = geneve->collect_md; |
cf1c9ccb | 692 | bool ipv4, ipv6; |
8ed66f0e JL |
693 | int ret = 0; |
694 | ||
cf1c9ccb JB |
695 | ipv6 = geneve->info.mode & IP_TUNNEL_INFO_IPV6 || metadata; |
696 | ipv4 = !ipv6 || metadata; | |
8ed66f0e | 697 | #if IS_ENABLED(CONFIG_IPV6) |
cf1c9ccb | 698 | if (ipv6) { |
8ed66f0e | 699 | ret = geneve_sock_add(geneve, true); |
cf1c9ccb JB |
700 | if (ret < 0 && ret != -EAFNOSUPPORT) |
701 | ipv4 = false; | |
702 | } | |
8ed66f0e | 703 | #endif |
cf1c9ccb | 704 | if (ipv4) |
8ed66f0e JL |
705 | ret = geneve_sock_add(geneve, false); |
706 | if (ret < 0) | |
707 | geneve_sock_release(geneve); | |
708 | ||
709 | return ret; | |
710 | } | |
711 | ||
2d07dc79 JL |
712 | static int geneve_stop(struct net_device *dev) |
713 | { | |
714 | struct geneve_dev *geneve = netdev_priv(dev); | |
2d07dc79 | 715 | |
4b4c21fa JB |
716 | hlist_del_init_rcu(&geneve->hlist4.hlist); |
717 | #if IS_ENABLED(CONFIG_IPV6) | |
718 | hlist_del_init_rcu(&geneve->hlist6.hlist); | |
719 | #endif | |
8ed66f0e | 720 | geneve_sock_release(geneve); |
371bd106 PS |
721 | return 0; |
722 | } | |
723 | ||
8ed66f0e | 724 | static void geneve_build_header(struct genevehdr *geneveh, |
c3ef5aa5 | 725 | const struct ip_tunnel_info *info) |
8ed66f0e JL |
726 | { |
727 | geneveh->ver = GENEVE_VER; | |
c3ef5aa5 | 728 | geneveh->opt_len = info->options_len / 4; |
729 | geneveh->oam = !!(info->key.tun_flags & TUNNEL_OAM); | |
730 | geneveh->critical = !!(info->key.tun_flags & TUNNEL_CRIT_OPT); | |
8ed66f0e | 731 | geneveh->rsvd1 = 0; |
c3ef5aa5 | 732 | tunnel_id_to_vni(info->key.tun_id, geneveh->vni); |
8ed66f0e JL |
733 | geneveh->proto_type = htons(ETH_P_TEB); |
734 | geneveh->rsvd2 = 0; | |
735 | ||
256c87c1 PJV |
736 | if (info->key.tun_flags & TUNNEL_GENEVE_OPT) |
737 | ip_tunnel_info_opts_get(geneveh->options, info); | |
8ed66f0e JL |
738 | } |
739 | ||
c3ef5aa5 | 740 | static int geneve_build_skb(struct dst_entry *dst, struct sk_buff *skb, |
741 | const struct ip_tunnel_info *info, | |
742 | bool xnet, int ip_hdr_len) | |
371bd106 | 743 | { |
c3ef5aa5 | 744 | bool udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM); |
8ed66f0e JL |
745 | struct genevehdr *gnvh; |
746 | int min_headroom; | |
747 | int err; | |
748 | ||
c3ef5aa5 | 749 | skb_reset_mac_header(skb); |
8ed66f0e JL |
750 | skb_scrub_packet(skb, xnet); |
751 | ||
c3ef5aa5 | 752 | min_headroom = LL_RESERVED_SPACE(dst->dev) + dst->header_len + |
753 | GENEVE_BASE_HLEN + info->options_len + ip_hdr_len; | |
8ed66f0e | 754 | err = skb_cow_head(skb, min_headroom); |
aed069df | 755 | if (unlikely(err)) |
8ed66f0e | 756 | goto free_dst; |
8ed66f0e | 757 | |
aed069df | 758 | err = udp_tunnel_handle_offloads(skb, udp_sum); |
1ba64fac | 759 | if (err) |
8ed66f0e | 760 | goto free_dst; |
8ed66f0e | 761 | |
d58ff351 | 762 | gnvh = __skb_push(skb, sizeof(*gnvh) + info->options_len); |
c3ef5aa5 | 763 | geneve_build_header(gnvh, info); |
8ed66f0e JL |
764 | skb_set_inner_protocol(skb, htons(ETH_P_TEB)); |
765 | return 0; | |
766 | ||
767 | free_dst: | |
768 | dst_release(dst); | |
769 | return err; | |
770 | } | |
8ed66f0e JL |
771 | |
772 | static struct rtable *geneve_get_v4_rt(struct sk_buff *skb, | |
773 | struct net_device *dev, | |
5b861f6b | 774 | struct geneve_sock *gs4, |
8ed66f0e | 775 | struct flowi4 *fl4, |
c3ef5aa5 | 776 | const struct ip_tunnel_info *info) |
e305ac6c | 777 | { |
db3c6139 | 778 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
e305ac6c | 779 | struct geneve_dev *geneve = netdev_priv(dev); |
468dfffc | 780 | struct dst_cache *dst_cache; |
e305ac6c PS |
781 | struct rtable *rt = NULL; |
782 | __u8 tos; | |
783 | ||
5b861f6b | 784 | if (!gs4) |
fceb9c3e | 785 | return ERR_PTR(-EIO); |
786 | ||
e305ac6c PS |
787 | memset(fl4, 0, sizeof(*fl4)); |
788 | fl4->flowi4_mark = skb->mark; | |
789 | fl4->flowi4_proto = IPPROTO_UDP; | |
9b4437a5 | 790 | fl4->daddr = info->key.u.ipv4.dst; |
791 | fl4->saddr = info->key.u.ipv4.src; | |
e305ac6c | 792 | |
9b4437a5 | 793 | tos = info->key.tos; |
794 | if ((tos == 1) && !geneve->collect_md) { | |
795 | tos = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
796 | use_cache = false; | |
468dfffc | 797 | } |
9b4437a5 | 798 | fl4->flowi4_tos = RT_TOS(tos); |
468dfffc | 799 | |
c3ef5aa5 | 800 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
801 | if (use_cache) { |
802 | rt = dst_cache_get_ip4(dst_cache, &fl4->saddr); | |
803 | if (rt) | |
804 | return rt; | |
e305ac6c | 805 | } |
e305ac6c PS |
806 | rt = ip_route_output_key(geneve->net, fl4); |
807 | if (IS_ERR(rt)) { | |
808 | netdev_dbg(dev, "no route to %pI4\n", &fl4->daddr); | |
fc4099f1 | 809 | return ERR_PTR(-ENETUNREACH); |
e305ac6c PS |
810 | } |
811 | if (rt->dst.dev == dev) { /* is this necessary? */ | |
812 | netdev_dbg(dev, "circular route to %pI4\n", &fl4->daddr); | |
e305ac6c | 813 | ip_rt_put(rt); |
fc4099f1 | 814 | return ERR_PTR(-ELOOP); |
e305ac6c | 815 | } |
468dfffc PA |
816 | if (use_cache) |
817 | dst_cache_set_ip4(dst_cache, &rt->dst, fl4->saddr); | |
e305ac6c PS |
818 | return rt; |
819 | } | |
820 | ||
8ed66f0e JL |
821 | #if IS_ENABLED(CONFIG_IPV6) |
822 | static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, | |
823 | struct net_device *dev, | |
5b861f6b | 824 | struct geneve_sock *gs6, |
8ed66f0e | 825 | struct flowi6 *fl6, |
c3ef5aa5 | 826 | const struct ip_tunnel_info *info) |
8ed66f0e | 827 | { |
db3c6139 | 828 | bool use_cache = ip_tunnel_dst_cache_usable(skb, info); |
8ed66f0e | 829 | struct geneve_dev *geneve = netdev_priv(dev); |
8ed66f0e | 830 | struct dst_entry *dst = NULL; |
468dfffc | 831 | struct dst_cache *dst_cache; |
3a56f86f | 832 | __u8 prio; |
8ed66f0e | 833 | |
fceb9c3e | 834 | if (!gs6) |
835 | return ERR_PTR(-EIO); | |
836 | ||
8ed66f0e JL |
837 | memset(fl6, 0, sizeof(*fl6)); |
838 | fl6->flowi6_mark = skb->mark; | |
839 | fl6->flowi6_proto = IPPROTO_UDP; | |
9b4437a5 | 840 | fl6->daddr = info->key.u.ipv6.dst; |
841 | fl6->saddr = info->key.u.ipv6.src; | |
842 | prio = info->key.tos; | |
843 | if ((prio == 1) && !geneve->collect_md) { | |
844 | prio = ip_tunnel_get_dsfield(ip_hdr(skb), skb); | |
845 | use_cache = false; | |
468dfffc PA |
846 | } |
847 | ||
9b4437a5 | 848 | fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), |
849 | info->key.label); | |
c3ef5aa5 | 850 | dst_cache = (struct dst_cache *)&info->dst_cache; |
468dfffc PA |
851 | if (use_cache) { |
852 | dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); | |
853 | if (dst) | |
854 | return dst; | |
8ed66f0e | 855 | } |
8ed66f0e JL |
856 | if (ipv6_stub->ipv6_dst_lookup(geneve->net, gs6->sock->sk, &dst, fl6)) { |
857 | netdev_dbg(dev, "no route to %pI6\n", &fl6->daddr); | |
858 | return ERR_PTR(-ENETUNREACH); | |
859 | } | |
860 | if (dst->dev == dev) { /* is this necessary? */ | |
861 | netdev_dbg(dev, "circular route to %pI6\n", &fl6->daddr); | |
862 | dst_release(dst); | |
863 | return ERR_PTR(-ELOOP); | |
864 | } | |
865 | ||
468dfffc PA |
866 | if (use_cache) |
867 | dst_cache_set_ip6(dst_cache, dst, &fl6->saddr); | |
8ed66f0e JL |
868 | return dst; |
869 | } | |
870 | #endif | |
871 | ||
9b4437a5 | 872 | static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 873 | struct geneve_dev *geneve, |
874 | const struct ip_tunnel_info *info) | |
2d07dc79 | 875 | { |
9b4437a5 | 876 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
877 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); | |
878 | const struct ip_tunnel_key *key = &info->key; | |
879 | struct rtable *rt; | |
2d07dc79 | 880 | struct flowi4 fl4; |
8760ce58 | 881 | __u8 tos, ttl; |
a025fb5f | 882 | __be16 df = 0; |
e305ac6c | 883 | __be16 sport; |
bcceeec3 | 884 | int err; |
980c394c | 885 | |
5b861f6b | 886 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
9b4437a5 | 887 | if (IS_ERR(rt)) |
888 | return PTR_ERR(rt); | |
371bd106 | 889 | |
6b4f92af SB |
890 | skb_tunnel_check_pmtu(skb, &rt->dst, |
891 | GENEVE_IPV4_HLEN + info->options_len); | |
52a589d5 | 892 | |
371bd106 | 893 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 894 | if (geneve->collect_md) { |
895 | tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
371bd106 | 896 | ttl = key->ttl; |
a025fb5f SB |
897 | |
898 | df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0; | |
e305ac6c | 899 | } else { |
9b4437a5 | 900 | tos = ip_tunnel_ecn_encap(fl4.flowi4_tos, ip_hdr(skb), skb); |
52d0d404 HL |
901 | if (geneve->ttl_inherit) |
902 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
903 | else | |
904 | ttl = key->ttl; | |
905 | ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); | |
a025fb5f SB |
906 | |
907 | if (geneve->df == GENEVE_DF_SET) { | |
908 | df = htons(IP_DF); | |
909 | } else if (geneve->df == GENEVE_DF_INHERIT) { | |
910 | struct ethhdr *eth = eth_hdr(skb); | |
911 | ||
912 | if (ntohs(eth->h_proto) == ETH_P_IPV6) { | |
913 | df = htons(IP_DF); | |
914 | } else if (ntohs(eth->h_proto) == ETH_P_IP) { | |
915 | struct iphdr *iph = ip_hdr(skb); | |
916 | ||
917 | if (iph->frag_off & htons(IP_DF)) | |
918 | df = htons(IP_DF); | |
919 | } | |
920 | } | |
2d07dc79 | 921 | } |
2d07dc79 | 922 | |
c3ef5aa5 | 923 | err = geneve_build_skb(&rt->dst, skb, info, xnet, sizeof(struct iphdr)); |
9b4437a5 | 924 | if (unlikely(err)) |
925 | return err; | |
efeb2267 | 926 | |
9b4437a5 | 927 | udp_tunnel_xmit_skb(rt, gs4->sock->sk, skb, fl4.saddr, fl4.daddr, |
928 | tos, ttl, df, sport, geneve->info.key.tp_dst, | |
929 | !net_eq(geneve->net, dev_net(geneve->dev)), | |
930 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
931 | return 0; | |
2d07dc79 JL |
932 | } |
933 | ||
8ed66f0e | 934 | #if IS_ENABLED(CONFIG_IPV6) |
9b4437a5 | 935 | static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, |
c3ef5aa5 | 936 | struct geneve_dev *geneve, |
937 | const struct ip_tunnel_info *info) | |
8ed66f0e | 938 | { |
9b4437a5 | 939 | bool xnet = !net_eq(geneve->net, dev_net(geneve->dev)); |
940 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); | |
941 | const struct ip_tunnel_key *key = &info->key; | |
8ed66f0e | 942 | struct dst_entry *dst = NULL; |
8ed66f0e | 943 | struct flowi6 fl6; |
3a56f86f | 944 | __u8 prio, ttl; |
8ed66f0e | 945 | __be16 sport; |
bcceeec3 | 946 | int err; |
8ed66f0e | 947 | |
5b861f6b | 948 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
9b4437a5 | 949 | if (IS_ERR(dst)) |
950 | return PTR_ERR(dst); | |
8ed66f0e | 951 | |
6b4f92af | 952 | skb_tunnel_check_pmtu(skb, dst, GENEVE_IPV6_HLEN + info->options_len); |
52a589d5 | 953 | |
8ed66f0e | 954 | sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); |
9b4437a5 | 955 | if (geneve->collect_md) { |
956 | prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb); | |
957 | ttl = key->ttl; | |
958 | } else { | |
959 | prio = ip_tunnel_ecn_encap(ip6_tclass(fl6.flowlabel), | |
960 | ip_hdr(skb), skb); | |
52d0d404 HL |
961 | if (geneve->ttl_inherit) |
962 | ttl = ip_tunnel_get_ttl(ip_hdr(skb), skb); | |
963 | else | |
964 | ttl = key->ttl; | |
965 | ttl = ttl ? : ip6_dst_hoplimit(dst); | |
9b4437a5 | 966 | } |
31ac1c19 | 967 | err = geneve_build_skb(dst, skb, info, xnet, sizeof(struct ipv6hdr)); |
9b4437a5 | 968 | if (unlikely(err)) |
969 | return err; | |
8ed66f0e | 970 | |
9b4437a5 | 971 | udp_tunnel6_xmit_skb(dst, gs6->sock->sk, skb, dev, |
972 | &fl6.saddr, &fl6.daddr, prio, ttl, | |
973 | info->key.label, sport, geneve->info.key.tp_dst, | |
974 | !(info->key.tun_flags & TUNNEL_CSUM)); | |
975 | return 0; | |
976 | } | |
977 | #endif | |
8ed66f0e | 978 | |
9b4437a5 | 979 | static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) |
980 | { | |
981 | struct geneve_dev *geneve = netdev_priv(dev); | |
982 | struct ip_tunnel_info *info = NULL; | |
983 | int err; | |
abe492b4 | 984 | |
9b4437a5 | 985 | if (geneve->collect_md) { |
986 | info = skb_tunnel_info(skb); | |
987 | if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { | |
988 | err = -EINVAL; | |
989 | netdev_dbg(dev, "no tunnel metadata\n"); | |
aed069df | 990 | goto tx_error; |
9b4437a5 | 991 | } |
8ed66f0e | 992 | } else { |
9b4437a5 | 993 | info = &geneve->info; |
8ed66f0e | 994 | } |
8eb3b995 | 995 | |
a717e3f7 | 996 | rcu_read_lock(); |
9b4437a5 | 997 | #if IS_ENABLED(CONFIG_IPV6) |
998 | if (info->mode & IP_TUNNEL_INFO_IPV6) | |
999 | err = geneve6_xmit_skb(skb, dev, geneve, info); | |
1000 | else | |
1001 | #endif | |
1002 | err = geneve_xmit_skb(skb, dev, geneve, info); | |
a717e3f7 | 1003 | rcu_read_unlock(); |
8ed66f0e | 1004 | |
9b4437a5 | 1005 | if (likely(!err)) |
1006 | return NETDEV_TX_OK; | |
8ed66f0e JL |
1007 | tx_error: |
1008 | dev_kfree_skb(skb); | |
aed069df | 1009 | |
8ed66f0e JL |
1010 | if (err == -ELOOP) |
1011 | dev->stats.collisions++; | |
1012 | else if (err == -ENETUNREACH) | |
1013 | dev->stats.tx_carrier_errors++; | |
efeb2267 HY |
1014 | |
1015 | dev->stats.tx_errors++; | |
8ed66f0e JL |
1016 | return NETDEV_TX_OK; |
1017 | } | |
8ed66f0e | 1018 | |
91572088 | 1019 | static int geneve_change_mtu(struct net_device *dev, int new_mtu) |
55e5bfb5 | 1020 | { |
91572088 JW |
1021 | if (new_mtu > dev->max_mtu) |
1022 | new_mtu = dev->max_mtu; | |
321acc1c AK |
1023 | else if (new_mtu < dev->min_mtu) |
1024 | new_mtu = dev->min_mtu; | |
aeee0e66 | 1025 | |
55e5bfb5 DW |
1026 | dev->mtu = new_mtu; |
1027 | return 0; | |
1028 | } | |
1029 | ||
fc4099f1 PS |
1030 | static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) |
1031 | { | |
1032 | struct ip_tunnel_info *info = skb_tunnel_info(skb); | |
1033 | struct geneve_dev *geneve = netdev_priv(dev); | |
fc4099f1 | 1034 | |
b8812fa8 | 1035 | if (ip_tunnel_info_af(info) == AF_INET) { |
9b4437a5 | 1036 | struct rtable *rt; |
1037 | struct flowi4 fl4; | |
5b861f6b | 1038 | struct geneve_sock *gs4 = rcu_dereference(geneve->sock4); |
9b4437a5 | 1039 | |
5b861f6b | 1040 | rt = geneve_get_v4_rt(skb, dev, gs4, &fl4, info); |
b8812fa8 JL |
1041 | if (IS_ERR(rt)) |
1042 | return PTR_ERR(rt); | |
fc4099f1 | 1043 | |
b8812fa8 JL |
1044 | ip_rt_put(rt); |
1045 | info->key.u.ipv4.src = fl4.saddr; | |
1046 | #if IS_ENABLED(CONFIG_IPV6) | |
1047 | } else if (ip_tunnel_info_af(info) == AF_INET6) { | |
9b4437a5 | 1048 | struct dst_entry *dst; |
1049 | struct flowi6 fl6; | |
5b861f6b | 1050 | struct geneve_sock *gs6 = rcu_dereference(geneve->sock6); |
9b4437a5 | 1051 | |
5b861f6b | 1052 | dst = geneve_get_v6_dst(skb, dev, gs6, &fl6, info); |
b8812fa8 JL |
1053 | if (IS_ERR(dst)) |
1054 | return PTR_ERR(dst); | |
1055 | ||
1056 | dst_release(dst); | |
1057 | info->key.u.ipv6.src = fl6.saddr; | |
1058 | #endif | |
1059 | } else { | |
1060 | return -EINVAL; | |
1061 | } | |
fc4099f1 | 1062 | |
fc4099f1 PS |
1063 | info->key.tp_src = udp_flow_src_port(geneve->net, skb, |
1064 | 1, USHRT_MAX, true); | |
9b4437a5 | 1065 | info->key.tp_dst = geneve->info.key.tp_dst; |
fc4099f1 PS |
1066 | return 0; |
1067 | } | |
1068 | ||
2d07dc79 JL |
1069 | static const struct net_device_ops geneve_netdev_ops = { |
1070 | .ndo_init = geneve_init, | |
1071 | .ndo_uninit = geneve_uninit, | |
1072 | .ndo_open = geneve_open, | |
1073 | .ndo_stop = geneve_stop, | |
1074 | .ndo_start_xmit = geneve_xmit, | |
1075 | .ndo_get_stats64 = ip_tunnel_get_stats64, | |
55e5bfb5 | 1076 | .ndo_change_mtu = geneve_change_mtu, |
2d07dc79 JL |
1077 | .ndo_validate_addr = eth_validate_addr, |
1078 | .ndo_set_mac_address = eth_mac_addr, | |
fc4099f1 | 1079 | .ndo_fill_metadata_dst = geneve_fill_metadata_dst, |
2d07dc79 JL |
1080 | }; |
1081 | ||
1082 | static void geneve_get_drvinfo(struct net_device *dev, | |
1083 | struct ethtool_drvinfo *drvinfo) | |
1084 | { | |
1085 | strlcpy(drvinfo->version, GENEVE_NETDEV_VER, sizeof(drvinfo->version)); | |
1086 | strlcpy(drvinfo->driver, "geneve", sizeof(drvinfo->driver)); | |
1087 | } | |
1088 | ||
1089 | static const struct ethtool_ops geneve_ethtool_ops = { | |
1090 | .get_drvinfo = geneve_get_drvinfo, | |
1091 | .get_link = ethtool_op_get_link, | |
1092 | }; | |
1093 | ||
1094 | /* Info for udev, that this is a virtual tunnel endpoint */ | |
1095 | static struct device_type geneve_type = { | |
1096 | .name = "geneve", | |
1097 | }; | |
1098 | ||
e5de25dc | 1099 | /* Calls the ndo_udp_tunnel_add of the caller in order to |
05ca4029 | 1100 | * supply the listening GENEVE udp ports. Callers are expected |
e5de25dc | 1101 | * to implement the ndo_udp_tunnel_add. |
05ca4029 | 1102 | */ |
2d2b13fc | 1103 | static void geneve_offload_rx_ports(struct net_device *dev, bool push) |
05ca4029 SA |
1104 | { |
1105 | struct net *net = dev_net(dev); | |
1106 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1107 | struct geneve_sock *gs; | |
681e683f | 1108 | |
05ca4029 | 1109 | rcu_read_lock(); |
2d2b13fc SD |
1110 | list_for_each_entry_rcu(gs, &gn->sock_list, list) { |
1111 | if (push) { | |
1112 | udp_tunnel_push_rx_port(dev, gs->sock, | |
1113 | UDP_TUNNEL_TYPE_GENEVE); | |
1114 | } else { | |
1115 | udp_tunnel_drop_rx_port(dev, gs->sock, | |
1116 | UDP_TUNNEL_TYPE_GENEVE); | |
1117 | } | |
1118 | } | |
05ca4029 SA |
1119 | rcu_read_unlock(); |
1120 | } | |
05ca4029 | 1121 | |
2d07dc79 JL |
1122 | /* Initialize the device structure. */ |
1123 | static void geneve_setup(struct net_device *dev) | |
1124 | { | |
1125 | ether_setup(dev); | |
1126 | ||
1127 | dev->netdev_ops = &geneve_netdev_ops; | |
1128 | dev->ethtool_ops = &geneve_ethtool_ops; | |
cf124db5 | 1129 | dev->needs_free_netdev = true; |
2d07dc79 JL |
1130 | |
1131 | SET_NETDEV_DEVTYPE(dev, &geneve_type); | |
1132 | ||
2d07dc79 JL |
1133 | dev->features |= NETIF_F_LLTX; |
1134 | dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1135 | dev->features |= NETIF_F_RXCSUM; | |
1136 | dev->features |= NETIF_F_GSO_SOFTWARE; | |
1137 | ||
2d07dc79 JL |
1138 | dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; |
1139 | dev->hw_features |= NETIF_F_GSO_SOFTWARE; | |
2d07dc79 | 1140 | |
91572088 JW |
1141 | /* MTU range: 68 - (something less than 65535) */ |
1142 | dev->min_mtu = ETH_MIN_MTU; | |
1143 | /* The max_mtu calculation does not take account of GENEVE | |
1144 | * options, to avoid excluding potentially valid | |
1145 | * configurations. This will be further reduced by IPvX hdr size. | |
1146 | */ | |
1147 | dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; | |
1148 | ||
2d07dc79 | 1149 | netif_keep_dst(dev); |
fc41cdb3 | 1150 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
ed961ac2 | 1151 | dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; |
87cd3dca | 1152 | eth_hw_addr_random(dev); |
2d07dc79 JL |
1153 | } |
1154 | ||
1155 | static const struct nla_policy geneve_policy[IFLA_GENEVE_MAX + 1] = { | |
1156 | [IFLA_GENEVE_ID] = { .type = NLA_U32 }, | |
1157 | [IFLA_GENEVE_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
8ed66f0e | 1158 | [IFLA_GENEVE_REMOTE6] = { .len = sizeof(struct in6_addr) }, |
8760ce58 | 1159 | [IFLA_GENEVE_TTL] = { .type = NLA_U8 }, |
d8951125 | 1160 | [IFLA_GENEVE_TOS] = { .type = NLA_U8 }, |
8eb3b995 | 1161 | [IFLA_GENEVE_LABEL] = { .type = NLA_U32 }, |
cd7918b3 | 1162 | [IFLA_GENEVE_PORT] = { .type = NLA_U16 }, |
e305ac6c | 1163 | [IFLA_GENEVE_COLLECT_METADATA] = { .type = NLA_FLAG }, |
abe492b4 TH |
1164 | [IFLA_GENEVE_UDP_CSUM] = { .type = NLA_U8 }, |
1165 | [IFLA_GENEVE_UDP_ZERO_CSUM6_TX] = { .type = NLA_U8 }, | |
1166 | [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NLA_U8 }, | |
52d0d404 | 1167 | [IFLA_GENEVE_TTL_INHERIT] = { .type = NLA_U8 }, |
a025fb5f | 1168 | [IFLA_GENEVE_DF] = { .type = NLA_U8 }, |
2d07dc79 JL |
1169 | }; |
1170 | ||
a8b8a889 MS |
1171 | static int geneve_validate(struct nlattr *tb[], struct nlattr *data[], |
1172 | struct netlink_ext_ack *extack) | |
2d07dc79 JL |
1173 | { |
1174 | if (tb[IFLA_ADDRESS]) { | |
c5ebc440 GM |
1175 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) { |
1176 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1177 | "Provided link layer address is not Ethernet"); | |
2d07dc79 | 1178 | return -EINVAL; |
c5ebc440 | 1179 | } |
2d07dc79 | 1180 | |
c5ebc440 GM |
1181 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) { |
1182 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_ADDRESS], | |
1183 | "Provided Ethernet address is not unicast"); | |
2d07dc79 | 1184 | return -EADDRNOTAVAIL; |
c5ebc440 | 1185 | } |
2d07dc79 JL |
1186 | } |
1187 | ||
c5ebc440 GM |
1188 | if (!data) { |
1189 | NL_SET_ERR_MSG(extack, | |
1190 | "Not enough attributes provided to perform the operation"); | |
2d07dc79 | 1191 | return -EINVAL; |
c5ebc440 | 1192 | } |
2d07dc79 JL |
1193 | |
1194 | if (data[IFLA_GENEVE_ID]) { | |
1195 | __u32 vni = nla_get_u32(data[IFLA_GENEVE_ID]); | |
1196 | ||
c5ebc440 GM |
1197 | if (vni >= GENEVE_N_VID) { |
1198 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_ID], | |
1199 | "Geneve ID must be lower than 16777216"); | |
2d07dc79 | 1200 | return -ERANGE; |
c5ebc440 | 1201 | } |
2d07dc79 JL |
1202 | } |
1203 | ||
a025fb5f SB |
1204 | if (data[IFLA_GENEVE_DF]) { |
1205 | enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1206 | ||
1207 | if (df < 0 || df > GENEVE_DF_MAX) { | |
1208 | NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_GENEVE_DF], | |
1209 | "Invalid DF attribute"); | |
1210 | return -EINVAL; | |
1211 | } | |
1212 | } | |
1213 | ||
2d07dc79 JL |
1214 | return 0; |
1215 | } | |
1216 | ||
371bd106 | 1217 | static struct geneve_dev *geneve_find_dev(struct geneve_net *gn, |
9b4437a5 | 1218 | const struct ip_tunnel_info *info, |
371bd106 PS |
1219 | bool *tun_on_same_port, |
1220 | bool *tun_collect_md) | |
1221 | { | |
9b4437a5 | 1222 | struct geneve_dev *geneve, *t = NULL; |
371bd106 PS |
1223 | |
1224 | *tun_on_same_port = false; | |
1225 | *tun_collect_md = false; | |
371bd106 | 1226 | list_for_each_entry(geneve, &gn->geneve_list, next) { |
9b4437a5 | 1227 | if (info->key.tp_dst == geneve->info.key.tp_dst) { |
371bd106 PS |
1228 | *tun_collect_md = geneve->collect_md; |
1229 | *tun_on_same_port = true; | |
1230 | } | |
9b4437a5 | 1231 | if (info->key.tun_id == geneve->info.key.tun_id && |
1232 | info->key.tp_dst == geneve->info.key.tp_dst && | |
1233 | !memcmp(&info->key.u, &geneve->info.key.u, sizeof(info->key.u))) | |
371bd106 PS |
1234 | t = geneve; |
1235 | } | |
1236 | return t; | |
1237 | } | |
1238 | ||
9b4437a5 | 1239 | static bool is_tnl_info_zero(const struct ip_tunnel_info *info) |
1240 | { | |
3fa5f11d SB |
1241 | return !(info->key.tun_id || info->key.tun_flags || info->key.tos || |
1242 | info->key.ttl || info->key.label || info->key.tp_src || | |
1243 | memchr_inv(&info->key.u, 0, sizeof(info->key.u))); | |
9b4437a5 | 1244 | } |
1245 | ||
5b861f6b GM |
1246 | static bool geneve_dst_addr_equal(struct ip_tunnel_info *a, |
1247 | struct ip_tunnel_info *b) | |
1248 | { | |
1249 | if (ip_tunnel_info_af(a) == AF_INET) | |
1250 | return a->key.u.ipv4.dst == b->key.u.ipv4.dst; | |
1251 | else | |
1252 | return ipv6_addr_equal(&a->key.u.ipv6.dst, &b->key.u.ipv6.dst); | |
1253 | } | |
1254 | ||
e305ac6c | 1255 | static int geneve_configure(struct net *net, struct net_device *dev, |
c5ebc440 | 1256 | struct netlink_ext_ack *extack, |
9b4437a5 | 1257 | const struct ip_tunnel_info *info, |
52d0d404 | 1258 | bool metadata, bool ipv6_rx_csum, |
a025fb5f | 1259 | bool ttl_inherit, enum ifla_geneve_df df) |
2d07dc79 JL |
1260 | { |
1261 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
371bd106 PS |
1262 | struct geneve_dev *t, *geneve = netdev_priv(dev); |
1263 | bool tun_collect_md, tun_on_same_port; | |
184fc8b5 | 1264 | int err, encap_len; |
2d07dc79 | 1265 | |
c5ebc440 GM |
1266 | if (metadata && !is_tnl_info_zero(info)) { |
1267 | NL_SET_ERR_MSG(extack, | |
1268 | "Device is externally controlled, so attributes (VNI, Port, and so on) must not be specified"); | |
8ed66f0e | 1269 | return -EINVAL; |
c5ebc440 | 1270 | } |
2d07dc79 JL |
1271 | |
1272 | geneve->net = net; | |
1273 | geneve->dev = dev; | |
1274 | ||
9b4437a5 | 1275 | t = geneve_find_dev(gn, info, &tun_on_same_port, &tun_collect_md); |
371bd106 PS |
1276 | if (t) |
1277 | return -EBUSY; | |
1278 | ||
184fc8b5 PA |
1279 | /* make enough headroom for basic scenario */ |
1280 | encap_len = GENEVE_BASE_HLEN + ETH_HLEN; | |
9a1c44d9 | 1281 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
184fc8b5 | 1282 | encap_len += sizeof(struct iphdr); |
91572088 JW |
1283 | dev->max_mtu -= sizeof(struct iphdr); |
1284 | } else { | |
184fc8b5 | 1285 | encap_len += sizeof(struct ipv6hdr); |
91572088 JW |
1286 | dev->max_mtu -= sizeof(struct ipv6hdr); |
1287 | } | |
184fc8b5 PA |
1288 | dev->needed_headroom = encap_len + ETH_HLEN; |
1289 | ||
371bd106 | 1290 | if (metadata) { |
c5ebc440 GM |
1291 | if (tun_on_same_port) { |
1292 | NL_SET_ERR_MSG(extack, | |
1293 | "There can be only one externally controlled device on a destination port"); | |
371bd106 | 1294 | return -EPERM; |
c5ebc440 | 1295 | } |
371bd106 | 1296 | } else { |
c5ebc440 GM |
1297 | if (tun_collect_md) { |
1298 | NL_SET_ERR_MSG(extack, | |
1299 | "There already exists an externally controlled device on this destination port"); | |
371bd106 | 1300 | return -EPERM; |
c5ebc440 | 1301 | } |
371bd106 PS |
1302 | } |
1303 | ||
9b4437a5 | 1304 | dst_cache_reset(&geneve->info.dst_cache); |
1305 | geneve->info = *info; | |
1306 | geneve->collect_md = metadata; | |
1307 | geneve->use_udp6_rx_checksums = ipv6_rx_csum; | |
52d0d404 | 1308 | geneve->ttl_inherit = ttl_inherit; |
a025fb5f | 1309 | geneve->df = df; |
468dfffc | 1310 | |
2d07dc79 JL |
1311 | err = register_netdevice(dev); |
1312 | if (err) | |
1313 | return err; | |
1314 | ||
e305ac6c | 1315 | list_add(&geneve->next, &gn->geneve_list); |
e305ac6c PS |
1316 | return 0; |
1317 | } | |
1318 | ||
9b4437a5 | 1319 | static void init_tnl_info(struct ip_tunnel_info *info, __u16 dst_port) |
1320 | { | |
1321 | memset(info, 0, sizeof(*info)); | |
1322 | info->key.tp_dst = htons(dst_port); | |
1323 | } | |
1324 | ||
c5ebc440 GM |
1325 | static int geneve_nl2info(struct nlattr *tb[], struct nlattr *data[], |
1326 | struct netlink_ext_ack *extack, | |
1327 | struct ip_tunnel_info *info, bool *metadata, | |
52d0d404 | 1328 | bool *use_udp6_rx_checksums, bool *ttl_inherit, |
a025fb5f | 1329 | enum ifla_geneve_df *df, bool changelink) |
e305ac6c | 1330 | { |
c5ebc440 GM |
1331 | int attrtype; |
1332 | ||
1333 | if (data[IFLA_GENEVE_REMOTE] && data[IFLA_GENEVE_REMOTE6]) { | |
1334 | NL_SET_ERR_MSG(extack, | |
1335 | "Cannot specify both IPv4 and IPv6 Remote addresses"); | |
8ed66f0e | 1336 | return -EINVAL; |
c5ebc440 | 1337 | } |
8ed66f0e JL |
1338 | |
1339 | if (data[IFLA_GENEVE_REMOTE]) { | |
c5ebc440 GM |
1340 | if (changelink && (ip_tunnel_info_af(info) == AF_INET6)) { |
1341 | attrtype = IFLA_GENEVE_REMOTE; | |
1342 | goto change_notsup; | |
1343 | } | |
5b861f6b GM |
1344 | |
1345 | info->key.u.ipv4.dst = | |
8ed66f0e | 1346 | nla_get_in_addr(data[IFLA_GENEVE_REMOTE]); |
9b4437a5 | 1347 | |
5b861f6b | 1348 | if (IN_MULTICAST(ntohl(info->key.u.ipv4.dst))) { |
c5ebc440 GM |
1349 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE], |
1350 | "Remote IPv4 address cannot be Multicast"); | |
9b4437a5 | 1351 | return -EINVAL; |
1352 | } | |
8ed66f0e JL |
1353 | } |
1354 | ||
1355 | if (data[IFLA_GENEVE_REMOTE6]) { | |
4c52a889 | 1356 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1357 | if (changelink && (ip_tunnel_info_af(info) == AF_INET)) { |
1358 | attrtype = IFLA_GENEVE_REMOTE6; | |
1359 | goto change_notsup; | |
1360 | } | |
5b861f6b GM |
1361 | |
1362 | info->mode = IP_TUNNEL_INFO_IPV6; | |
1363 | info->key.u.ipv6.dst = | |
8ed66f0e JL |
1364 | nla_get_in6_addr(data[IFLA_GENEVE_REMOTE6]); |
1365 | ||
5b861f6b | 1366 | if (ipv6_addr_type(&info->key.u.ipv6.dst) & |
8ed66f0e | 1367 | IPV6_ADDR_LINKLOCAL) { |
c5ebc440 GM |
1368 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1369 | "Remote IPv6 address cannot be link-local"); | |
8ed66f0e JL |
1370 | return -EINVAL; |
1371 | } | |
5b861f6b | 1372 | if (ipv6_addr_is_multicast(&info->key.u.ipv6.dst)) { |
c5ebc440 GM |
1373 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1374 | "Remote IPv6 address cannot be Multicast"); | |
9b4437a5 | 1375 | return -EINVAL; |
1376 | } | |
5b861f6b GM |
1377 | info->key.tun_flags |= TUNNEL_CSUM; |
1378 | *use_udp6_rx_checksums = true; | |
9b4437a5 | 1379 | #else |
c5ebc440 GM |
1380 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_REMOTE6], |
1381 | "IPv6 support not enabled in the kernel"); | |
9b4437a5 | 1382 | return -EPFNOSUPPORT; |
1383 | #endif | |
8ed66f0e JL |
1384 | } |
1385 | ||
9b4437a5 | 1386 | if (data[IFLA_GENEVE_ID]) { |
1387 | __u32 vni; | |
1388 | __u8 tvni[3]; | |
5b861f6b | 1389 | __be64 tunid; |
9b4437a5 | 1390 | |
e277de5f | 1391 | vni = nla_get_u32(data[IFLA_GENEVE_ID]); |
9b4437a5 | 1392 | tvni[0] = (vni & 0x00ff0000) >> 16; |
1393 | tvni[1] = (vni & 0x0000ff00) >> 8; | |
1394 | tvni[2] = vni & 0x000000ff; | |
e305ac6c | 1395 | |
5b861f6b | 1396 | tunid = vni_to_tunnel_id(tvni); |
c5ebc440 GM |
1397 | if (changelink && (tunid != info->key.tun_id)) { |
1398 | attrtype = IFLA_GENEVE_ID; | |
1399 | goto change_notsup; | |
1400 | } | |
5b861f6b | 1401 | info->key.tun_id = tunid; |
9b4437a5 | 1402 | } |
5b861f6b | 1403 | |
a97d97ba HL |
1404 | if (data[IFLA_GENEVE_TTL_INHERIT]) { |
1405 | if (nla_get_u8(data[IFLA_GENEVE_TTL_INHERIT])) | |
1406 | *ttl_inherit = true; | |
1407 | else | |
1408 | *ttl_inherit = false; | |
1409 | } else if (data[IFLA_GENEVE_TTL]) { | |
5b861f6b | 1410 | info->key.ttl = nla_get_u8(data[IFLA_GENEVE_TTL]); |
a97d97ba HL |
1411 | *ttl_inherit = false; |
1412 | } | |
52d0d404 | 1413 | |
d8951125 | 1414 | if (data[IFLA_GENEVE_TOS]) |
5b861f6b | 1415 | info->key.tos = nla_get_u8(data[IFLA_GENEVE_TOS]); |
d8951125 | 1416 | |
a025fb5f SB |
1417 | if (data[IFLA_GENEVE_DF]) |
1418 | *df = nla_get_u8(data[IFLA_GENEVE_DF]); | |
1419 | ||
9b4437a5 | 1420 | if (data[IFLA_GENEVE_LABEL]) { |
5b861f6b | 1421 | info->key.label = nla_get_be32(data[IFLA_GENEVE_LABEL]) & |
9b4437a5 | 1422 | IPV6_FLOWLABEL_MASK; |
c5ebc440 GM |
1423 | if (info->key.label && (!(info->mode & IP_TUNNEL_INFO_IPV6))) { |
1424 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_LABEL], | |
1425 | "Label attribute only applies for IPv6 Geneve devices"); | |
9b4437a5 | 1426 | return -EINVAL; |
c5ebc440 | 1427 | } |
9b4437a5 | 1428 | } |
8eb3b995 | 1429 | |
5b861f6b | 1430 | if (data[IFLA_GENEVE_PORT]) { |
c5ebc440 GM |
1431 | if (changelink) { |
1432 | attrtype = IFLA_GENEVE_PORT; | |
1433 | goto change_notsup; | |
1434 | } | |
5b861f6b GM |
1435 | info->key.tp_dst = nla_get_be16(data[IFLA_GENEVE_PORT]); |
1436 | } | |
2d07dc79 | 1437 | |
5b861f6b | 1438 | if (data[IFLA_GENEVE_COLLECT_METADATA]) { |
c5ebc440 GM |
1439 | if (changelink) { |
1440 | attrtype = IFLA_GENEVE_COLLECT_METADATA; | |
1441 | goto change_notsup; | |
1442 | } | |
5b861f6b GM |
1443 | *metadata = true; |
1444 | } | |
2d07dc79 | 1445 | |
5b861f6b | 1446 | if (data[IFLA_GENEVE_UDP_CSUM]) { |
c5ebc440 GM |
1447 | if (changelink) { |
1448 | attrtype = IFLA_GENEVE_UDP_CSUM; | |
1449 | goto change_notsup; | |
1450 | } | |
5b861f6b GM |
1451 | if (nla_get_u8(data[IFLA_GENEVE_UDP_CSUM])) |
1452 | info->key.tun_flags |= TUNNEL_CSUM; | |
1453 | } | |
abe492b4 | 1454 | |
5b861f6b | 1455 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { |
f9094b76 | 1456 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1457 | if (changelink) { |
1458 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_TX; | |
1459 | goto change_notsup; | |
1460 | } | |
5b861f6b GM |
1461 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) |
1462 | info->key.tun_flags &= ~TUNNEL_CSUM; | |
f9094b76 HL |
1463 | #else |
1464 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX], | |
1465 | "IPv6 support not enabled in the kernel"); | |
1466 | return -EPFNOSUPPORT; | |
1467 | #endif | |
5b861f6b | 1468 | } |
abe492b4 | 1469 | |
5b861f6b | 1470 | if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { |
f9094b76 | 1471 | #if IS_ENABLED(CONFIG_IPV6) |
c5ebc440 GM |
1472 | if (changelink) { |
1473 | attrtype = IFLA_GENEVE_UDP_ZERO_CSUM6_RX; | |
1474 | goto change_notsup; | |
1475 | } | |
5b861f6b GM |
1476 | if (nla_get_u8(data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) |
1477 | *use_udp6_rx_checksums = false; | |
f9094b76 HL |
1478 | #else |
1479 | NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_UDP_ZERO_CSUM6_RX], | |
1480 | "IPv6 support not enabled in the kernel"); | |
1481 | return -EPFNOSUPPORT; | |
1482 | #endif | |
5b861f6b GM |
1483 | } |
1484 | ||
1485 | return 0; | |
c5ebc440 GM |
1486 | change_notsup: |
1487 | NL_SET_ERR_MSG_ATTR(extack, data[attrtype], | |
1488 | "Changing VNI, Port, endpoint IP address family, external, and UDP checksum attributes are not supported"); | |
1489 | return -EOPNOTSUPP; | |
5b861f6b GM |
1490 | } |
1491 | ||
c40e89fd AK |
1492 | static void geneve_link_config(struct net_device *dev, |
1493 | struct ip_tunnel_info *info, struct nlattr *tb[]) | |
1494 | { | |
1495 | struct geneve_dev *geneve = netdev_priv(dev); | |
1496 | int ldev_mtu = 0; | |
1497 | ||
1498 | if (tb[IFLA_MTU]) { | |
1499 | geneve_change_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | switch (ip_tunnel_info_af(info)) { | |
1504 | case AF_INET: { | |
1505 | struct flowi4 fl4 = { .daddr = info->key.u.ipv4.dst }; | |
1506 | struct rtable *rt = ip_route_output_key(geneve->net, &fl4); | |
1507 | ||
1508 | if (!IS_ERR(rt) && rt->dst.dev) { | |
1509 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV4_HLEN; | |
1510 | ip_rt_put(rt); | |
1511 | } | |
1512 | break; | |
1513 | } | |
1514 | #if IS_ENABLED(CONFIG_IPV6) | |
1515 | case AF_INET6: { | |
c0a47e44 HL |
1516 | struct rt6_info *rt; |
1517 | ||
1518 | if (!__in6_dev_get(dev)) | |
1519 | break; | |
1520 | ||
1521 | rt = rt6_lookup(geneve->net, &info->key.u.ipv6.dst, NULL, 0, | |
1522 | NULL, 0); | |
c40e89fd AK |
1523 | |
1524 | if (rt && rt->dst.dev) | |
1525 | ldev_mtu = rt->dst.dev->mtu - GENEVE_IPV6_HLEN; | |
1526 | ip6_rt_put(rt); | |
1527 | break; | |
1528 | } | |
1529 | #endif | |
1530 | } | |
1531 | ||
1532 | if (ldev_mtu <= 0) | |
1533 | return; | |
1534 | ||
1535 | geneve_change_mtu(dev, ldev_mtu - info->options_len); | |
1536 | } | |
1537 | ||
5b861f6b GM |
1538 | static int geneve_newlink(struct net *net, struct net_device *dev, |
1539 | struct nlattr *tb[], struct nlattr *data[], | |
1540 | struct netlink_ext_ack *extack) | |
1541 | { | |
a025fb5f | 1542 | enum ifla_geneve_df df = GENEVE_DF_UNSET; |
5b861f6b GM |
1543 | bool use_udp6_rx_checksums = false; |
1544 | struct ip_tunnel_info info; | |
52d0d404 | 1545 | bool ttl_inherit = false; |
5b861f6b GM |
1546 | bool metadata = false; |
1547 | int err; | |
1548 | ||
1549 | init_tnl_info(&info, GENEVE_UDP_PORT); | |
c5ebc440 | 1550 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1551 | &use_udp6_rx_checksums, &ttl_inherit, &df, false); |
5b861f6b GM |
1552 | if (err) |
1553 | return err; | |
abe492b4 | 1554 | |
c40e89fd | 1555 | err = geneve_configure(net, dev, extack, &info, metadata, |
a025fb5f | 1556 | use_udp6_rx_checksums, ttl_inherit, df); |
c40e89fd AK |
1557 | if (err) |
1558 | return err; | |
1559 | ||
1560 | geneve_link_config(dev, &info, tb); | |
1561 | ||
1562 | return 0; | |
2d07dc79 JL |
1563 | } |
1564 | ||
5b861f6b GM |
1565 | /* Quiesces the geneve device data path for both TX and RX. |
1566 | * | |
1567 | * On transmit geneve checks for non-NULL geneve_sock before it proceeds. | |
1568 | * So, if we set that socket to NULL under RCU and wait for synchronize_net() | |
1569 | * to complete for the existing set of in-flight packets to be transmitted, | |
1570 | * then we would have quiesced the transmit data path. All the future packets | |
1571 | * will get dropped until we unquiesce the data path. | |
1572 | * | |
1573 | * On receive geneve dereference the geneve_sock stashed in the socket. So, | |
1574 | * if we set that to NULL under RCU and wait for synchronize_net() to | |
1575 | * complete, then we would have quiesced the receive data path. | |
1576 | */ | |
1577 | static void geneve_quiesce(struct geneve_dev *geneve, struct geneve_sock **gs4, | |
1578 | struct geneve_sock **gs6) | |
1579 | { | |
1580 | *gs4 = rtnl_dereference(geneve->sock4); | |
1581 | rcu_assign_pointer(geneve->sock4, NULL); | |
1582 | if (*gs4) | |
1583 | rcu_assign_sk_user_data((*gs4)->sock->sk, NULL); | |
1584 | #if IS_ENABLED(CONFIG_IPV6) | |
1585 | *gs6 = rtnl_dereference(geneve->sock6); | |
1586 | rcu_assign_pointer(geneve->sock6, NULL); | |
1587 | if (*gs6) | |
1588 | rcu_assign_sk_user_data((*gs6)->sock->sk, NULL); | |
1589 | #else | |
1590 | *gs6 = NULL; | |
1591 | #endif | |
1592 | synchronize_net(); | |
1593 | } | |
1594 | ||
1595 | /* Resumes the geneve device data path for both TX and RX. */ | |
1596 | static void geneve_unquiesce(struct geneve_dev *geneve, struct geneve_sock *gs4, | |
1597 | struct geneve_sock __maybe_unused *gs6) | |
1598 | { | |
1599 | rcu_assign_pointer(geneve->sock4, gs4); | |
1600 | if (gs4) | |
1601 | rcu_assign_sk_user_data(gs4->sock->sk, gs4); | |
1602 | #if IS_ENABLED(CONFIG_IPV6) | |
1603 | rcu_assign_pointer(geneve->sock6, gs6); | |
1604 | if (gs6) | |
1605 | rcu_assign_sk_user_data(gs6->sock->sk, gs6); | |
1606 | #endif | |
1607 | synchronize_net(); | |
1608 | } | |
1609 | ||
1610 | static int geneve_changelink(struct net_device *dev, struct nlattr *tb[], | |
1611 | struct nlattr *data[], | |
1612 | struct netlink_ext_ack *extack) | |
1613 | { | |
1614 | struct geneve_dev *geneve = netdev_priv(dev); | |
1615 | struct geneve_sock *gs4, *gs6; | |
1616 | struct ip_tunnel_info info; | |
1617 | bool metadata; | |
1618 | bool use_udp6_rx_checksums; | |
a025fb5f | 1619 | enum ifla_geneve_df df; |
52d0d404 | 1620 | bool ttl_inherit; |
5b861f6b GM |
1621 | int err; |
1622 | ||
1623 | /* If the geneve device is configured for metadata (or externally | |
1624 | * controlled, for example, OVS), then nothing can be changed. | |
1625 | */ | |
1626 | if (geneve->collect_md) | |
1627 | return -EOPNOTSUPP; | |
1628 | ||
1629 | /* Start with the existing info. */ | |
1630 | memcpy(&info, &geneve->info, sizeof(info)); | |
1631 | metadata = geneve->collect_md; | |
1632 | use_udp6_rx_checksums = geneve->use_udp6_rx_checksums; | |
52d0d404 | 1633 | ttl_inherit = geneve->ttl_inherit; |
c5ebc440 | 1634 | err = geneve_nl2info(tb, data, extack, &info, &metadata, |
a025fb5f | 1635 | &use_udp6_rx_checksums, &ttl_inherit, &df, true); |
5b861f6b GM |
1636 | if (err) |
1637 | return err; | |
1638 | ||
c40e89fd | 1639 | if (!geneve_dst_addr_equal(&geneve->info, &info)) { |
5b861f6b | 1640 | dst_cache_reset(&info.dst_cache); |
c40e89fd AK |
1641 | geneve_link_config(dev, &info, tb); |
1642 | } | |
5b861f6b GM |
1643 | |
1644 | geneve_quiesce(geneve, &gs4, &gs6); | |
1645 | geneve->info = info; | |
1646 | geneve->collect_md = metadata; | |
1647 | geneve->use_udp6_rx_checksums = use_udp6_rx_checksums; | |
52d0d404 | 1648 | geneve->ttl_inherit = ttl_inherit; |
5b861f6b GM |
1649 | geneve_unquiesce(geneve, gs4, gs6); |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
2d07dc79 JL |
1654 | static void geneve_dellink(struct net_device *dev, struct list_head *head) |
1655 | { | |
1656 | struct geneve_dev *geneve = netdev_priv(dev); | |
1657 | ||
2d07dc79 JL |
1658 | list_del(&geneve->next); |
1659 | unregister_netdevice_queue(dev, head); | |
1660 | } | |
1661 | ||
1662 | static size_t geneve_get_size(const struct net_device *dev) | |
1663 | { | |
1664 | return nla_total_size(sizeof(__u32)) + /* IFLA_GENEVE_ID */ | |
8ed66f0e | 1665 | nla_total_size(sizeof(struct in6_addr)) + /* IFLA_GENEVE_REMOTE{6} */ |
8760ce58 | 1666 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL */ |
d8951125 | 1667 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TOS */ |
a025fb5f | 1668 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_DF */ |
8eb3b995 | 1669 | nla_total_size(sizeof(__be32)) + /* IFLA_GENEVE_LABEL */ |
7bbe33ff | 1670 | nla_total_size(sizeof(__be16)) + /* IFLA_GENEVE_PORT */ |
e305ac6c | 1671 | nla_total_size(0) + /* IFLA_GENEVE_COLLECT_METADATA */ |
abe492b4 TH |
1672 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_CSUM */ |
1673 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_TX */ | |
1674 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_UDP_ZERO_CSUM6_RX */ | |
52d0d404 | 1675 | nla_total_size(sizeof(__u8)) + /* IFLA_GENEVE_TTL_INHERIT */ |
2d07dc79 JL |
1676 | 0; |
1677 | } | |
1678 | ||
1679 | static int geneve_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
1680 | { | |
1681 | struct geneve_dev *geneve = netdev_priv(dev); | |
9b4437a5 | 1682 | struct ip_tunnel_info *info = &geneve->info; |
52d0d404 | 1683 | bool ttl_inherit = geneve->ttl_inherit; |
fd7eafd0 | 1684 | bool metadata = geneve->collect_md; |
9b4437a5 | 1685 | __u8 tmp_vni[3]; |
2d07dc79 JL |
1686 | __u32 vni; |
1687 | ||
9b4437a5 | 1688 | tunnel_id_to_vni(info->key.tun_id, tmp_vni); |
1689 | vni = (tmp_vni[0] << 16) | (tmp_vni[1] << 8) | tmp_vni[2]; | |
2d07dc79 JL |
1690 | if (nla_put_u32(skb, IFLA_GENEVE_ID, vni)) |
1691 | goto nla_put_failure; | |
1692 | ||
fd7eafd0 | 1693 | if (!metadata && ip_tunnel_info_af(info) == AF_INET) { |
8ed66f0e | 1694 | if (nla_put_in_addr(skb, IFLA_GENEVE_REMOTE, |
9b4437a5 | 1695 | info->key.u.ipv4.dst)) |
1696 | goto nla_put_failure; | |
9b4437a5 | 1697 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_CSUM, |
1698 | !!(info->key.tun_flags & TUNNEL_CSUM))) | |
8ed66f0e | 1699 | goto nla_put_failure; |
9b4437a5 | 1700 | |
8ed66f0e | 1701 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 | 1702 | } else if (!metadata) { |
8ed66f0e | 1703 | if (nla_put_in6_addr(skb, IFLA_GENEVE_REMOTE6, |
9b4437a5 | 1704 | &info->key.u.ipv6.dst)) |
1705 | goto nla_put_failure; | |
9b4437a5 | 1706 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, |
1707 | !(info->key.tun_flags & TUNNEL_CSUM))) | |
1708 | goto nla_put_failure; | |
11387fe4 | 1709 | #endif |
fd7eafd0 | 1710 | } |
2d07dc79 | 1711 | |
9b4437a5 | 1712 | if (nla_put_u8(skb, IFLA_GENEVE_TTL, info->key.ttl) || |
1713 | nla_put_u8(skb, IFLA_GENEVE_TOS, info->key.tos) || | |
1714 | nla_put_be32(skb, IFLA_GENEVE_LABEL, info->key.label)) | |
8760ce58 JL |
1715 | goto nla_put_failure; |
1716 | ||
a025fb5f SB |
1717 | if (nla_put_u8(skb, IFLA_GENEVE_DF, geneve->df)) |
1718 | goto nla_put_failure; | |
1719 | ||
9b4437a5 | 1720 | if (nla_put_be16(skb, IFLA_GENEVE_PORT, info->key.tp_dst)) |
cd7918b3 PS |
1721 | goto nla_put_failure; |
1722 | ||
fd7eafd0 | 1723 | if (metadata && nla_put_flag(skb, IFLA_GENEVE_COLLECT_METADATA)) |
f9094b76 | 1724 | goto nla_put_failure; |
fd7eafd0 | 1725 | |
f9094b76 | 1726 | #if IS_ENABLED(CONFIG_IPV6) |
fd7eafd0 HL |
1727 | if (nla_put_u8(skb, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, |
1728 | !geneve->use_udp6_rx_checksums)) | |
1729 | goto nla_put_failure; | |
f9094b76 | 1730 | #endif |
fd7eafd0 | 1731 | |
52d0d404 HL |
1732 | if (nla_put_u8(skb, IFLA_GENEVE_TTL_INHERIT, ttl_inherit)) |
1733 | goto nla_put_failure; | |
1734 | ||
2d07dc79 JL |
1735 | return 0; |
1736 | ||
1737 | nla_put_failure: | |
1738 | return -EMSGSIZE; | |
1739 | } | |
1740 | ||
1741 | static struct rtnl_link_ops geneve_link_ops __read_mostly = { | |
1742 | .kind = "geneve", | |
1743 | .maxtype = IFLA_GENEVE_MAX, | |
1744 | .policy = geneve_policy, | |
1745 | .priv_size = sizeof(struct geneve_dev), | |
1746 | .setup = geneve_setup, | |
1747 | .validate = geneve_validate, | |
1748 | .newlink = geneve_newlink, | |
5b861f6b | 1749 | .changelink = geneve_changelink, |
2d07dc79 JL |
1750 | .dellink = geneve_dellink, |
1751 | .get_size = geneve_get_size, | |
1752 | .fill_info = geneve_fill_info, | |
1753 | }; | |
1754 | ||
e305ac6c PS |
1755 | struct net_device *geneve_dev_create_fb(struct net *net, const char *name, |
1756 | u8 name_assign_type, u16 dst_port) | |
1757 | { | |
1758 | struct nlattr *tb[IFLA_MAX + 1]; | |
9b4437a5 | 1759 | struct ip_tunnel_info info; |
e305ac6c | 1760 | struct net_device *dev; |
106da663 | 1761 | LIST_HEAD(list_kill); |
e305ac6c PS |
1762 | int err; |
1763 | ||
1764 | memset(tb, 0, sizeof(tb)); | |
1765 | dev = rtnl_create_link(net, name, name_assign_type, | |
d0522f1c | 1766 | &geneve_link_ops, tb, NULL); |
e305ac6c PS |
1767 | if (IS_ERR(dev)) |
1768 | return dev; | |
1769 | ||
9b4437a5 | 1770 | init_tnl_info(&info, dst_port); |
a025fb5f SB |
1771 | err = geneve_configure(net, dev, NULL, &info, |
1772 | true, true, false, GENEVE_DF_UNSET); | |
106da663 ND |
1773 | if (err) { |
1774 | free_netdev(dev); | |
1775 | return ERR_PTR(err); | |
1776 | } | |
7e059158 DW |
1777 | |
1778 | /* openvswitch users expect packet sizes to be unrestricted, | |
1779 | * so set the largest MTU we can. | |
1780 | */ | |
91572088 | 1781 | err = geneve_change_mtu(dev, IP_MAX_MTU); |
7e059158 DW |
1782 | if (err) |
1783 | goto err; | |
1784 | ||
41009481 ND |
1785 | err = rtnl_configure_link(dev, NULL); |
1786 | if (err < 0) | |
1787 | goto err; | |
1788 | ||
e305ac6c | 1789 | return dev; |
9b4437a5 | 1790 | err: |
106da663 ND |
1791 | geneve_dellink(dev, &list_kill); |
1792 | unregister_netdevice_many(&list_kill); | |
7e059158 | 1793 | return ERR_PTR(err); |
e305ac6c PS |
1794 | } |
1795 | EXPORT_SYMBOL_GPL(geneve_dev_create_fb); | |
1796 | ||
681e683f HFS |
1797 | static int geneve_netdevice_event(struct notifier_block *unused, |
1798 | unsigned long event, void *ptr) | |
1799 | { | |
1800 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
1801 | ||
2d2b13fc | 1802 | if (event == NETDEV_UDP_TUNNEL_PUSH_INFO || |
04584957 | 1803 | event == NETDEV_UDP_TUNNEL_DROP_INFO) { |
2d2b13fc | 1804 | geneve_offload_rx_ports(dev, event == NETDEV_UDP_TUNNEL_PUSH_INFO); |
04584957 SD |
1805 | } else if (event == NETDEV_UNREGISTER) { |
1806 | geneve_offload_rx_ports(dev, false); | |
1807 | } else if (event == NETDEV_REGISTER) { | |
1808 | geneve_offload_rx_ports(dev, true); | |
1809 | } | |
681e683f HFS |
1810 | |
1811 | return NOTIFY_DONE; | |
1812 | } | |
1813 | ||
1814 | static struct notifier_block geneve_notifier_block __read_mostly = { | |
1815 | .notifier_call = geneve_netdevice_event, | |
1816 | }; | |
1817 | ||
2d07dc79 JL |
1818 | static __net_init int geneve_init_net(struct net *net) |
1819 | { | |
1820 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
2d07dc79 JL |
1821 | |
1822 | INIT_LIST_HEAD(&gn->geneve_list); | |
371bd106 | 1823 | INIT_LIST_HEAD(&gn->sock_list); |
2d07dc79 JL |
1824 | return 0; |
1825 | } | |
1826 | ||
2843a253 | 1827 | static void geneve_destroy_tunnels(struct net *net, struct list_head *head) |
2d07dc79 JL |
1828 | { |
1829 | struct geneve_net *gn = net_generic(net, geneve_net_id); | |
1830 | struct geneve_dev *geneve, *next; | |
1831 | struct net_device *dev, *aux; | |
2d07dc79 JL |
1832 | |
1833 | /* gather any geneve devices that were moved into this ns */ | |
1834 | for_each_netdev_safe(net, dev, aux) | |
1835 | if (dev->rtnl_link_ops == &geneve_link_ops) | |
2843a253 | 1836 | unregister_netdevice_queue(dev, head); |
2d07dc79 JL |
1837 | |
1838 | /* now gather any other geneve devices that were created in this ns */ | |
1839 | list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) { | |
1840 | /* If geneve->dev is in the same netns, it was already added | |
1841 | * to the list by the previous loop. | |
1842 | */ | |
1843 | if (!net_eq(dev_net(geneve->dev), net)) | |
2843a253 | 1844 | unregister_netdevice_queue(geneve->dev, head); |
2d07dc79 JL |
1845 | } |
1846 | ||
2843a253 HY |
1847 | WARN_ON_ONCE(!list_empty(&gn->sock_list)); |
1848 | } | |
1849 | ||
1850 | static void __net_exit geneve_exit_batch_net(struct list_head *net_list) | |
1851 | { | |
1852 | struct net *net; | |
1853 | LIST_HEAD(list); | |
1854 | ||
1855 | rtnl_lock(); | |
1856 | list_for_each_entry(net, net_list, exit_list) | |
1857 | geneve_destroy_tunnels(net, &list); | |
1858 | ||
2d07dc79 JL |
1859 | /* unregister the devices gathered above */ |
1860 | unregister_netdevice_many(&list); | |
1861 | rtnl_unlock(); | |
1862 | } | |
1863 | ||
1864 | static struct pernet_operations geneve_net_ops = { | |
1865 | .init = geneve_init_net, | |
2843a253 | 1866 | .exit_batch = geneve_exit_batch_net, |
2d07dc79 JL |
1867 | .id = &geneve_net_id, |
1868 | .size = sizeof(struct geneve_net), | |
1869 | }; | |
1870 | ||
1871 | static int __init geneve_init_module(void) | |
1872 | { | |
1873 | int rc; | |
1874 | ||
1875 | rc = register_pernet_subsys(&geneve_net_ops); | |
1876 | if (rc) | |
1877 | goto out1; | |
1878 | ||
681e683f | 1879 | rc = register_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1880 | if (rc) |
1881 | goto out2; | |
1882 | ||
681e683f HFS |
1883 | rc = rtnl_link_register(&geneve_link_ops); |
1884 | if (rc) | |
1885 | goto out3; | |
1886 | ||
2d07dc79 | 1887 | return 0; |
681e683f HFS |
1888 | out3: |
1889 | unregister_netdevice_notifier(&geneve_notifier_block); | |
2d07dc79 JL |
1890 | out2: |
1891 | unregister_pernet_subsys(&geneve_net_ops); | |
1892 | out1: | |
1893 | return rc; | |
1894 | } | |
1895 | late_initcall(geneve_init_module); | |
1896 | ||
1897 | static void __exit geneve_cleanup_module(void) | |
1898 | { | |
1899 | rtnl_link_unregister(&geneve_link_ops); | |
681e683f | 1900 | unregister_netdevice_notifier(&geneve_notifier_block); |
2d07dc79 JL |
1901 | unregister_pernet_subsys(&geneve_net_ops); |
1902 | } | |
1903 | module_exit(geneve_cleanup_module); | |
1904 | ||
1905 | MODULE_LICENSE("GPL"); | |
1906 | MODULE_VERSION(GENEVE_NETDEV_VER); | |
1907 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | |
1908 | MODULE_DESCRIPTION("Interface driver for GENEVE encapsulated traffic"); | |
1909 | MODULE_ALIAS_RTNL_LINK("geneve"); |