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064af421 | 1 | /* |
e23775f2 | 2 | * Copyright (c) 2007-2015 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
064af421 | 54 | |
064af421 | 55 | #include "datapath.h" |
038e34ab | 56 | #include "conntrack.h" |
064af421 | 57 | #include "flow.h" |
d103f479 | 58 | #include "flow_table.h" |
a097c0b2 | 59 | #include "flow_netlink.h" |
e23775f2 | 60 | #include "gso.h" |
f2459fe7 | 61 | #include "vport-internal_dev.h" |
d5de5b0d | 62 | #include "vport-netdev.h" |
064af421 | 63 | |
2a4999f3 | 64 | int ovs_net_id __read_mostly; |
5a38795f | 65 | EXPORT_SYMBOL_GPL(ovs_net_id); |
2a4999f3 | 66 | |
cb25142c PS |
67 | static struct genl_family dp_packet_genl_family; |
68 | static struct genl_family dp_flow_genl_family; | |
69 | static struct genl_family dp_datapath_genl_family; | |
70 | ||
bc619e29 JS |
71 | static const struct nla_policy flow_policy[]; |
72 | ||
18fd3a52 PS |
73 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
74 | .name = OVS_FLOW_MCGROUP | |
cb25142c PS |
75 | }; |
76 | ||
18fd3a52 PS |
77 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
78 | .name = OVS_DATAPATH_MCGROUP | |
cb25142c PS |
79 | }; |
80 | ||
18fd3a52 PS |
81 | struct genl_multicast_group ovs_dp_vport_multicast_group = { |
82 | .name = OVS_VPORT_MCGROUP | |
cb25142c PS |
83 | }; |
84 | ||
afad3556 | 85 | /* Check if need to build a reply message. |
af465b67 PS |
86 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. |
87 | */ | |
114fce23 SG |
88 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
89 | unsigned int group) | |
afad3556 JR |
90 | { |
91 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
6233a1bd | 92 | genl_has_listeners(family, genl_info_net(info), group); |
afad3556 JR |
93 | } |
94 | ||
18fd3a52 | 95 | static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp, |
cb25142c | 96 | struct sk_buff *skb, struct genl_info *info) |
e297c6b7 | 97 | { |
cb25142c PS |
98 | genl_notify(family, skb, genl_info_net(info), |
99 | info->snd_portid, GROUP_ID(grp), info->nlhdr, GFP_KERNEL); | |
e297c6b7 TG |
100 | } |
101 | ||
ed099e92 BP |
102 | /** |
103 | * DOC: Locking: | |
064af421 | 104 | * |
cd2a59e9 PS |
105 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
106 | * operations on vports, etc.), Writes to other state (flow table | |
107 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
108 | * by ovs_lock. | |
ed099e92 BP |
109 | * |
110 | * Reads are protected by RCU. | |
111 | * | |
112 | * There are a few special cases (mostly stats) that have their own | |
113 | * synchronization but they nest under all of above and don't interact with | |
114 | * each other. | |
cd2a59e9 PS |
115 | * |
116 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 117 | */ |
ed099e92 | 118 | |
cd2a59e9 PS |
119 | static DEFINE_MUTEX(ovs_mutex); |
120 | ||
121 | void ovs_lock(void) | |
122 | { | |
123 | mutex_lock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | void ovs_unlock(void) | |
127 | { | |
128 | mutex_unlock(&ovs_mutex); | |
129 | } | |
130 | ||
131 | #ifdef CONFIG_LOCKDEP | |
132 | int lockdep_ovsl_is_held(void) | |
133 | { | |
134 | if (debug_locks) | |
135 | return lockdep_is_held(&ovs_mutex); | |
136 | else | |
137 | return 1; | |
138 | } | |
5a38795f | 139 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
cd2a59e9 PS |
140 | #endif |
141 | ||
5ae440c3 | 142 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 TG |
143 | const struct sw_flow_key *, |
144 | const struct dp_upcall_info *); | |
5ae440c3 | 145 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7d16c847 | 146 | const struct sw_flow_key *, |
7257b535 | 147 | const struct dp_upcall_info *); |
064af421 | 148 | |
01ac0970 AZ |
149 | /* Must be called with rcu_read_lock. */ |
150 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
064af421 | 151 | { |
01ac0970 | 152 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ed099e92 | 153 | |
254f2dc8 | 154 | if (dev) { |
850b6b3b | 155 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 | 156 | if (vport) |
01ac0970 | 157 | return vport->dp; |
254f2dc8 | 158 | } |
01ac0970 AZ |
159 | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
af465b67 PS |
164 | * returned dp pointer valid. |
165 | */ | |
01ac0970 AZ |
166 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) |
167 | { | |
168 | struct datapath *dp; | |
169 | ||
170 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
171 | rcu_read_lock(); | |
172 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
173 | rcu_read_unlock(); |
174 | ||
175 | return dp; | |
064af421 | 176 | } |
064af421 | 177 | |
cd2a59e9 | 178 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 179 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 180 | { |
cd2a59e9 | 181 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
e23775f2 | 182 | return ovs_vport_name(vport); |
f2459fe7 JG |
183 | } |
184 | ||
f1f60b85 | 185 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
186 | { |
187 | struct vport *local; | |
188 | int ifindex; | |
189 | ||
190 | rcu_read_lock(); | |
191 | ||
95b1d73a | 192 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 193 | if (local) |
e23775f2 | 194 | ifindex = local->dev->ifindex; |
99769a40 JG |
195 | else |
196 | ifindex = 0; | |
197 | ||
198 | rcu_read_unlock(); | |
199 | ||
200 | return ifindex; | |
201 | } | |
202 | ||
46c6a11d JG |
203 | static void destroy_dp_rcu(struct rcu_head *rcu) |
204 | { | |
205 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 206 | |
e379e4d1 | 207 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 208 | free_percpu(dp->stats_percpu); |
95b1d73a | 209 | kfree(dp->ports); |
5ca1ba48 | 210 | kfree(dp); |
46c6a11d JG |
211 | } |
212 | ||
95b1d73a PS |
213 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
214 | u16 port_no) | |
215 | { | |
216 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
217 | } | |
218 | ||
aa917006 | 219 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
220 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
221 | { | |
222 | struct vport *vport; | |
95b1d73a PS |
223 | struct hlist_head *head; |
224 | ||
225 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 226 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
227 | if (vport->port_no == port_no) |
228 | return vport; | |
229 | } | |
230 | return NULL; | |
231 | } | |
232 | ||
cd2a59e9 | 233 | /* Called with ovs_mutex. */ |
c19e6535 | 234 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 235 | { |
f2459fe7 | 236 | struct vport *vport; |
f2459fe7 | 237 | |
850b6b3b | 238 | vport = ovs_vport_add(parms); |
c19e6535 BP |
239 | if (!IS_ERR(vport)) { |
240 | struct datapath *dp = parms->dp; | |
95b1d73a | 241 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 242 | |
95b1d73a | 243 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 244 | } |
c19e6535 | 245 | return vport; |
064af421 BP |
246 | } |
247 | ||
850b6b3b | 248 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 249 | { |
cd2a59e9 | 250 | ASSERT_OVSL(); |
064af421 | 251 | |
064af421 | 252 | /* First drop references to device. */ |
95b1d73a | 253 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 254 | |
7237e4f4 | 255 | /* Then destroy it. */ |
850b6b3b | 256 | ovs_vport_del(p); |
064af421 BP |
257 | } |
258 | ||
fb66fbd1 | 259 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 260 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 261 | { |
a6059080 | 262 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 263 | struct datapath *dp = p->dp; |
3544358a | 264 | struct sw_flow *flow; |
ad50cb60 | 265 | struct sw_flow_actions *sf_acts; |
064af421 | 266 | struct dp_stats_percpu *stats; |
e9141eec | 267 | u64 *stats_counter; |
4fa72a95 | 268 | u32 n_mask_hit; |
064af421 | 269 | |
70dbc259 | 270 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 271 | |
52a23d92 | 272 | /* Look up flow. */ |
e74d4817 | 273 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 274 | &n_mask_hit); |
52a23d92 JG |
275 | if (unlikely(!flow)) { |
276 | struct dp_upcall_info upcall; | |
a7d607c5 | 277 | int error; |
52a23d92 | 278 | |
0e469d3b | 279 | memset(&upcall, 0, sizeof(upcall)); |
52a23d92 | 280 | upcall.cmd = OVS_PACKET_CMD_MISS; |
beb1c69a | 281 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
a94ebc39 | 282 | upcall.mru = OVS_CB(skb)->mru; |
e74d4817 | 283 | error = ovs_dp_upcall(dp, skb, key, &upcall); |
a7d607c5 LR |
284 | if (unlikely(error)) |
285 | kfree_skb(skb); | |
286 | else | |
287 | consume_skb(skb); | |
52a23d92 JG |
288 | stats_counter = &stats->n_missed; |
289 | goto out; | |
290 | } | |
291 | ||
e74d4817 | 292 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 293 | sf_acts = rcu_dereference(flow->sf_acts); |
7d16c847 PS |
294 | ovs_execute_actions(dp, skb, sf_acts, key); |
295 | ||
b0b906cc | 296 | stats_counter = &stats->n_hit; |
55574bb0 | 297 | |
8819fac7 | 298 | out: |
55574bb0 | 299 | /* Update datapath statistics. */ |
b81deb15 | 300 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 301 | (*stats_counter)++; |
4fa72a95 | 302 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 303 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
304 | } |
305 | ||
850b6b3b | 306 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 307 | const struct sw_flow_key *key, |
850b6b3b | 308 | const struct dp_upcall_info *upcall_info) |
aa5a8fdc JG |
309 | { |
310 | struct dp_stats_percpu *stats; | |
311 | int err; | |
312 | ||
28aea917 | 313 | if (upcall_info->portid == 0) { |
b063d9f0 | 314 | err = -ENOTCONN; |
b063d9f0 JG |
315 | goto err; |
316 | } | |
317 | ||
7257b535 | 318 | if (!skb_is_gso(skb)) |
e74d4817 | 319 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
7257b535 | 320 | else |
e74d4817 | 321 | err = queue_gso_packets(dp, skb, key, upcall_info); |
d76195db JG |
322 | if (err) |
323 | goto err; | |
324 | ||
325 | return 0; | |
aa5a8fdc | 326 | |
aa5a8fdc | 327 | err: |
70dbc259 | 328 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 329 | |
b81deb15 | 330 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 331 | stats->n_lost++; |
b81deb15 | 332 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 333 | |
aa5a8fdc | 334 | return err; |
982b8810 BP |
335 | } |
336 | ||
5ae440c3 | 337 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 338 | const struct sw_flow_key *key, |
7257b535 | 339 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 340 | { |
d4cba1f8 | 341 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
342 | struct sw_flow_key later_key; |
343 | struct sk_buff *segs, *nskb; | |
b2a23c4e | 344 | struct ovs_skb_cb ovs_cb; |
7257b535 | 345 | int err; |
cb5087ca | 346 | |
b2a23c4e | 347 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 348 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 349 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
350 | if (IS_ERR(segs)) |
351 | return PTR_ERR(segs); | |
d1da7669 PS |
352 | if (segs == NULL) |
353 | return -EINVAL; | |
99769a40 | 354 | |
9b277b39 | 355 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 356 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
357 | * in this case is for a first fragment, so we need to |
358 | * properly mark later fragments. | |
359 | */ | |
e74d4817 | 360 | later_key = *key; |
9b277b39 PS |
361 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
362 | } | |
363 | ||
7257b535 BP |
364 | /* Queue all of the segments. */ |
365 | skb = segs; | |
cb5087ca | 366 | do { |
b2a23c4e | 367 | *OVS_CB(skb) = ovs_cb; |
9b277b39 | 368 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 369 | key = &later_key; |
9b277b39 | 370 | |
e74d4817 | 371 | err = queue_userspace_packet(dp, skb, key, upcall_info); |
982b8810 | 372 | if (err) |
7257b535 | 373 | break; |
856081f6 | 374 | |
36ce148c | 375 | } while ((skb = skb->next)); |
cb5087ca | 376 | |
7257b535 BP |
377 | /* Free all of the segments. */ |
378 | skb = segs; | |
379 | do { | |
380 | nskb = skb->next; | |
381 | if (err) | |
382 | kfree_skb(skb); | |
383 | else | |
384 | consume_skb(skb); | |
385 | } while ((skb = nskb)); | |
386 | return err; | |
387 | } | |
388 | ||
8b7ea2d4 | 389 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
533bea51 | 390 | unsigned int hdrlen) |
0afa2373 TG |
391 | { |
392 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 393 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
4e25b8c1 | 394 | + nla_total_size(ovs_key_attr_size()); /* OVS_PACKET_ATTR_KEY */ |
0afa2373 TG |
395 | |
396 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
397 | if (upcall_info->userdata) |
398 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
399 | ||
400 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
401 | if (upcall_info->egress_tun_info) | |
402 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 | 403 | |
0e469d3b NM |
404 | /* OVS_PACKET_ATTR_ACTIONS */ |
405 | if (upcall_info->actions_len) | |
406 | size += nla_total_size(upcall_info->actions_len); | |
407 | ||
a94ebc39 JS |
408 | /* OVS_PACKET_ATTR_MRU */ |
409 | if (upcall_info->mru) | |
410 | size += nla_total_size(sizeof(upcall_info->mru)); | |
411 | ||
0afa2373 TG |
412 | return size; |
413 | } | |
414 | ||
a94ebc39 JS |
415 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
416 | { | |
417 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
418 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
419 | ||
420 | if (plen > 0) | |
421 | memset(skb_put(skb, plen), 0, plen); | |
422 | } | |
423 | } | |
424 | ||
5ae440c3 | 425 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 426 | const struct sw_flow_key *key, |
7257b535 BP |
427 | const struct dp_upcall_info *upcall_info) |
428 | { | |
429 | struct ovs_header *upcall; | |
6161d3fd | 430 | struct sk_buff *nskb = NULL; |
82706a6f | 431 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 432 | struct nlattr *nla; |
68eadcf0 | 433 | struct genl_info info = { |
705e9260 | 434 | #ifdef HAVE_GENLMSG_NEW_UNICAST |
5ae440c3 | 435 | .dst_sk = ovs_dp_get_net(dp)->genl_sock, |
68eadcf0 TG |
436 | #endif |
437 | .snd_portid = upcall_info->portid, | |
438 | }; | |
978188b2 | 439 | size_t len; |
533bea51 | 440 | unsigned int hlen; |
5ae440c3 TG |
441 | int err, dp_ifindex; |
442 | ||
443 | dp_ifindex = get_dpifindex(dp); | |
444 | if (!dp_ifindex) | |
445 | return -ENODEV; | |
7257b535 | 446 | |
efd8a18e | 447 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
448 | nskb = skb_clone(skb, GFP_ATOMIC); |
449 | if (!nskb) | |
450 | return -ENOMEM; | |
07ac71ea | 451 | |
8063e095 | 452 | nskb = __vlan_hwaccel_push_inside(nskb); |
07ac71ea PS |
453 | if (!nskb) |
454 | return -ENOMEM; | |
455 | ||
6161d3fd JG |
456 | skb = nskb; |
457 | } | |
458 | ||
459 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
460 | err = -EFBIG; | |
461 | goto out; | |
462 | } | |
7257b535 | 463 | |
533bea51 TG |
464 | /* Complete checksum if needed */ |
465 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
466 | (err = skb_checksum_help(skb))) | |
467 | goto out; | |
468 | ||
469 | /* Older versions of OVS user space enforce alignment of the last | |
470 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
471 | * padding logic. Only perform zerocopy if padding is not required. | |
472 | */ | |
473 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
474 | hlen = skb_zerocopy_headlen(skb); | |
475 | else | |
476 | hlen = skb->len; | |
477 | ||
8b7ea2d4 | 478 | len = upcall_msg_size(upcall_info, hlen); |
68eadcf0 | 479 | user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC); |
6161d3fd JG |
480 | if (!user_skb) { |
481 | err = -ENOMEM; | |
482 | goto out; | |
483 | } | |
7257b535 BP |
484 | |
485 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
486 | 0, upcall_info->cmd); | |
487 | upcall->dp_ifindex = dp_ifindex; | |
488 | ||
db7f2238 | 489 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 490 | BUG_ON(err); |
7257b535 BP |
491 | |
492 | if (upcall_info->userdata) | |
e995e3df | 493 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 494 | nla_len(upcall_info->userdata), |
e995e3df | 495 | nla_data(upcall_info->userdata)); |
7257b535 | 496 | |
e23775f2 | 497 | |
8b7ea2d4 WZ |
498 | if (upcall_info->egress_tun_info) { |
499 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
500 | err = ovs_nla_put_egress_tunnel_key(user_skb, | |
e23775f2 PS |
501 | upcall_info->egress_tun_info, |
502 | upcall_info->egress_tun_opts); | |
8b7ea2d4 WZ |
503 | BUG_ON(err); |
504 | nla_nest_end(user_skb, nla); | |
505 | } | |
506 | ||
0e469d3b NM |
507 | if (upcall_info->actions_len) { |
508 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
509 | err = ovs_nla_put_actions(upcall_info->actions, | |
510 | upcall_info->actions_len, | |
511 | user_skb); | |
512 | if (!err) | |
513 | nla_nest_end(user_skb, nla); | |
514 | else | |
515 | nla_nest_cancel(user_skb, nla); | |
516 | } | |
517 | ||
a94ebc39 JS |
518 | /* Add OVS_PACKET_ATTR_MRU */ |
519 | if (upcall_info->mru) { | |
520 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
521 | upcall_info->mru)) { | |
522 | err = -ENOBUFS; | |
523 | goto out; | |
524 | } | |
525 | pad_packet(dp, user_skb); | |
526 | } | |
527 | ||
533bea51 | 528 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
529 | * in skb_zerocopy() |
530 | */ | |
533bea51 TG |
531 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
532 | err = -ENOBUFS; | |
533 | goto out; | |
534 | } | |
535 | nla->nla_len = nla_attr_size(skb->len); | |
bed53bd1 | 536 | |
2c272bd9 ZK |
537 | err = skb_zerocopy(user_skb, skb, skb->len, hlen); |
538 | if (err) | |
539 | goto out; | |
7257b535 | 540 | |
ef507cec | 541 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
a94ebc39 | 542 | pad_packet(dp, user_skb); |
ef507cec | 543 | |
533bea51 | 544 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 545 | |
533bea51 | 546 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 547 | user_skb = NULL; |
6161d3fd | 548 | out: |
2c272bd9 ZK |
549 | if (err) |
550 | skb_tx_error(skb); | |
82706a6f | 551 | kfree_skb(user_skb); |
6161d3fd JG |
552 | kfree_skb(nskb); |
553 | return err; | |
cb5087ca BP |
554 | } |
555 | ||
df2c07f4 | 556 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 557 | { |
df2c07f4 | 558 | struct ovs_header *ovs_header = info->userhdr; |
a94ebc39 | 559 | struct net *net = sock_net(skb->sk); |
982b8810 | 560 | struct nlattr **a = info->attrs; |
e0e57990 | 561 | struct sw_flow_actions *acts; |
982b8810 | 562 | struct sk_buff *packet; |
e0e57990 | 563 | struct sw_flow *flow; |
ad50cb60 | 564 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 565 | struct datapath *dp; |
d6569377 | 566 | struct ethhdr *eth; |
a6059080 | 567 | struct vport *input_vport; |
a94ebc39 | 568 | u16 mru = 0; |
3f19d399 | 569 | int len; |
d6569377 | 570 | int err; |
2e460098 | 571 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 572 | |
f7cd0081 | 573 | err = -EINVAL; |
df2c07f4 | 574 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 575 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 576 | goto err; |
064af421 | 577 | |
df2c07f4 | 578 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 579 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
580 | err = -ENOMEM; |
581 | if (!packet) | |
e5cad958 | 582 | goto err; |
3f19d399 BP |
583 | skb_reserve(packet, NET_IP_ALIGN); |
584 | ||
bf3d6fce | 585 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 586 | |
f7cd0081 BP |
587 | skb_reset_mac_header(packet); |
588 | eth = eth_hdr(packet); | |
064af421 | 589 | |
d6569377 BP |
590 | /* Normally, setting the skb 'protocol' field would be handled by a |
591 | * call to eth_type_trans(), but it assumes there's a sending | |
af465b67 PS |
592 | * device, which we may not have. |
593 | */ | |
935fc582 | 594 | if (eth_proto_is_802_3(eth->h_proto)) |
f7cd0081 | 595 | packet->protocol = eth->h_proto; |
d6569377 | 596 | else |
f7cd0081 | 597 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 598 | |
a94ebc39 JS |
599 | /* Set packet's mru */ |
600 | if (a[OVS_PACKET_ATTR_MRU]) { | |
601 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
602 | packet->ignore_df = 1; | |
603 | } | |
604 | OVS_CB(packet)->mru = mru; | |
605 | ||
e0e57990 | 606 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 607 | flow = ovs_flow_alloc(); |
e0e57990 BP |
608 | err = PTR_ERR(flow); |
609 | if (IS_ERR(flow)) | |
e5cad958 | 610 | goto err_kfree_skb; |
064af421 | 611 | |
038e34ab JS |
612 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
613 | packet, &flow->key, log); | |
e0e57990 | 614 | if (err) |
9321954a | 615 | goto err_flow_free; |
e0e57990 | 616 | |
a94ebc39 | 617 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 618 | &flow->key, &acts, log); |
9b405f1a PS |
619 | if (err) |
620 | goto err_flow_free; | |
e0e57990 | 621 | |
ff27161e | 622 | rcu_assign_pointer(flow->sf_acts, acts); |
abff858b | 623 | packet->priority = flow->key.phy.priority; |
3025a772 | 624 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 625 | |
d6569377 | 626 | rcu_read_lock(); |
a94ebc39 | 627 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
f7cd0081 | 628 | err = -ENODEV; |
e5cad958 BP |
629 | if (!dp) |
630 | goto err_unlock; | |
cc4015df | 631 | |
a6059080 AZ |
632 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
633 | if (!input_vport) | |
634 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
635 | ||
636 | if (!input_vport) | |
637 | goto err_unlock; | |
638 | ||
e23775f2 | 639 | packet->dev = input_vport->dev; |
a6059080 | 640 | OVS_CB(packet)->input_vport = input_vport; |
ad50cb60 | 641 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 642 | |
e9141eec | 643 | local_bh_disable(); |
7d16c847 | 644 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 645 | local_bh_enable(); |
d6569377 | 646 | rcu_read_unlock(); |
e0e57990 | 647 | |
a1c564be | 648 | ovs_flow_free(flow, false); |
e5cad958 | 649 | return err; |
064af421 | 650 | |
e5cad958 BP |
651 | err_unlock: |
652 | rcu_read_unlock(); | |
9321954a | 653 | err_flow_free: |
a1c564be | 654 | ovs_flow_free(flow, false); |
e5cad958 BP |
655 | err_kfree_skb: |
656 | kfree_skb(packet); | |
657 | err: | |
d6569377 | 658 | return err; |
064af421 BP |
659 | } |
660 | ||
df2c07f4 | 661 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 662 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
663 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
664 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 665 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
a94ebc39 | 666 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
982b8810 BP |
667 | }; |
668 | ||
18fd3a52 | 669 | static struct genl_ops dp_packet_genl_ops[] = { |
df2c07f4 | 670 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
671 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
672 | .policy = packet_policy, | |
df2c07f4 | 673 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
674 | } |
675 | }; | |
676 | ||
cb25142c PS |
677 | static struct genl_family dp_packet_genl_family = { |
678 | .id = GENL_ID_GENERATE, | |
679 | .hdrsize = sizeof(struct ovs_header), | |
680 | .name = OVS_PACKET_FAMILY, | |
681 | .version = OVS_PACKET_VERSION, | |
682 | .maxattr = OVS_PACKET_ATTR_MAX, | |
683 | .netnsok = true, | |
684 | .parallel_ops = true, | |
685 | .ops = dp_packet_genl_ops, | |
686 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
687 | }; | |
688 | ||
f1f60b85 | 689 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 690 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 691 | { |
d6569377 | 692 | int i; |
f180c2e2 | 693 | |
4fa72a95 AZ |
694 | memset(mega_stats, 0, sizeof(*mega_stats)); |
695 | ||
994dc286 | 696 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 697 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 698 | |
7257b535 | 699 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 700 | |
d6569377 BP |
701 | for_each_possible_cpu(i) { |
702 | const struct dp_stats_percpu *percpu_stats; | |
703 | struct dp_stats_percpu local_stats; | |
821cb9fa | 704 | unsigned int start; |
44e05eca | 705 | |
d6569377 | 706 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 707 | |
d6569377 | 708 | do { |
b81deb15 | 709 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 710 | local_stats = *percpu_stats; |
b81deb15 | 711 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 712 | |
d6569377 BP |
713 | stats->n_hit += local_stats.n_hit; |
714 | stats->n_missed += local_stats.n_missed; | |
715 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 716 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
717 | } |
718 | } | |
064af421 | 719 | |
bc619e29 JS |
720 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
721 | { | |
722 | return ovs_identifier_is_ufid(sfid) && | |
723 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
724 | } | |
725 | ||
726 | static bool should_fill_mask(uint32_t ufid_flags) | |
727 | { | |
728 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
729 | } | |
730 | ||
731 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 732 | { |
bc619e29 JS |
733 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
734 | } | |
735 | ||
736 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
737 | const struct sw_flow_id *sfid, | |
738 | uint32_t ufid_flags) | |
739 | { | |
740 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
741 | ||
742 | /* OVS_FLOW_ATTR_UFID */ | |
743 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
744 | len += nla_total_size(sfid->ufid_len); | |
745 | ||
746 | /* OVS_FLOW_ATTR_KEY */ | |
747 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
748 | len += nla_total_size(ovs_key_attr_size()); | |
749 | ||
750 | /* OVS_FLOW_ATTR_MASK */ | |
751 | if (should_fill_mask(ufid_flags)) | |
752 | len += nla_total_size(ovs_key_attr_size()); | |
753 | ||
754 | /* OVS_FLOW_ATTR_ACTIONS */ | |
755 | if (should_fill_actions(ufid_flags)) | |
c3bb15b3 | 756 | len += nla_total_size(acts->orig_len); |
bc619e29 JS |
757 | |
758 | return len | |
0afa2373 TG |
759 | + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
760 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
bc619e29 | 761 | + nla_total_size(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
762 | } |
763 | ||
f1948bb9 JS |
764 | /* Called with ovs_mutex or RCU read lock. */ |
765 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
766 | struct sk_buff *skb) | |
767 | { | |
768 | struct ovs_flow_stats stats; | |
769 | __be16 tcp_flags; | |
770 | unsigned long used; | |
771 | ||
b0f3a2fe | 772 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 773 | |
b0f3a2fe PS |
774 | if (used && |
775 | nla_put_u64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used))) | |
f1948bb9 | 776 | return -EMSGSIZE; |
d6569377 | 777 | |
b0f3a2fe PS |
778 | if (stats.n_packets && |
779 | nla_put(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats)) | |
f1948bb9 | 780 | return -EMSGSIZE; |
b0b906cc | 781 | |
b0f3a2fe PS |
782 | if ((u8)ntohs(tcp_flags) && |
783 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
784 | return -EMSGSIZE; |
785 | ||
786 | return 0; | |
787 | } | |
788 | ||
789 | /* Called with ovs_mutex or RCU read lock. */ | |
790 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
791 | struct sk_buff *skb, int skb_orig_len) | |
792 | { | |
793 | struct nlattr *start; | |
794 | int err; | |
d6569377 | 795 | |
df2c07f4 | 796 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
797 | * this is the first flow to be dumped into 'skb'. This is unusual for |
798 | * Netlink but individual action lists can be longer than | |
799 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
800 | * The userspace caller can always fetch the actions separately if it | |
801 | * really wants them. (Most userspace callers in fact don't care.) | |
802 | * | |
803 | * This can only fail for dump operations because the skb is always | |
804 | * properly sized for single flows. | |
805 | */ | |
9b405f1a | 806 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 807 | if (start) { |
f44ccce1 PS |
808 | const struct sw_flow_actions *sf_acts; |
809 | ||
780ec6ae | 810 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
811 | err = ovs_nla_put_actions(sf_acts->actions, |
812 | sf_acts->actions_len, skb); | |
f71db6b1 | 813 | |
0a25b039 BP |
814 | if (!err) |
815 | nla_nest_end(skb, start); | |
816 | else { | |
817 | if (skb_orig_len) | |
f1948bb9 | 818 | return err; |
0a25b039 BP |
819 | |
820 | nla_nest_cancel(skb, start); | |
821 | } | |
f1948bb9 JS |
822 | } else if (skb_orig_len) { |
823 | return -EMSGSIZE; | |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 830 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 831 | struct sk_buff *skb, u32 portid, |
bc619e29 | 832 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
833 | { |
834 | const int skb_orig_len = skb->len; | |
835 | struct ovs_header *ovs_header; | |
836 | int err; | |
837 | ||
7d16c847 PS |
838 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
839 | flags, cmd); | |
f1948bb9 JS |
840 | if (!ovs_header) |
841 | return -EMSGSIZE; | |
7d16c847 | 842 | |
f1948bb9 JS |
843 | ovs_header->dp_ifindex = dp_ifindex; |
844 | ||
bc619e29 | 845 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
846 | if (err) |
847 | goto error; | |
848 | ||
bc619e29 JS |
849 | if (should_fill_key(&flow->id, ufid_flags)) { |
850 | err = ovs_nla_put_masked_key(flow, skb); | |
851 | if (err) | |
852 | goto error; | |
853 | } | |
854 | ||
855 | if (should_fill_mask(ufid_flags)) { | |
856 | err = ovs_nla_put_mask(flow, skb); | |
857 | if (err) | |
858 | goto error; | |
859 | } | |
f1948bb9 JS |
860 | |
861 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
862 | if (err) | |
863 | goto error; | |
864 | ||
bc619e29 JS |
865 | if (should_fill_actions(ufid_flags)) { |
866 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
867 | if (err) | |
868 | goto error; | |
869 | } | |
37a1300c | 870 | |
23b48dc1 TG |
871 | genlmsg_end(skb, ovs_header); |
872 | return 0; | |
d6569377 | 873 | |
37a1300c | 874 | error: |
df2c07f4 | 875 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 876 | return err; |
44e05eca BP |
877 | } |
878 | ||
f71db6b1 JR |
879 | /* May not be called with RCU read lock. */ |
880 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 881 | const struct sw_flow_id *sfid, |
afad3556 | 882 | struct genl_info *info, |
bc619e29 JS |
883 | bool always, |
884 | uint32_t ufid_flags) | |
44e05eca | 885 | { |
afad3556 | 886 | struct sk_buff *skb; |
bc619e29 | 887 | size_t len; |
d6569377 | 888 | |
114fce23 SG |
889 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
890 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
891 | return NULL; |
892 | ||
bc619e29 JS |
893 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
894 | skb = genlmsg_new_unicast(len, info, GFP_KERNEL); | |
afad3556 JR |
895 | if (!skb) |
896 | return ERR_PTR(-ENOMEM); | |
897 | ||
898 | return skb; | |
37a1300c | 899 | } |
8d5ebd83 | 900 | |
f71db6b1 | 901 | /* Called with ovs_mutex. */ |
7d16c847 | 902 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
903 | int dp_ifindex, |
904 | struct genl_info *info, u8 cmd, | |
bc619e29 | 905 | bool always, u32 ufid_flags) |
37a1300c BP |
906 | { |
907 | struct sk_buff *skb; | |
908 | int retval; | |
d6569377 | 909 | |
bc619e29 JS |
910 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
911 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 912 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 913 | return skb; |
d6569377 | 914 | |
2c622e5a | 915 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 916 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 917 | cmd, ufid_flags); |
37a1300c | 918 | BUG_ON(retval < 0); |
d6569377 | 919 | return skb; |
064af421 BP |
920 | } |
921 | ||
0c9fd022 | 922 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 923 | { |
a94ebc39 | 924 | struct net *net = sock_net(skb->sk); |
37a1300c | 925 | struct nlattr **a = info->attrs; |
df2c07f4 | 926 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 927 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 928 | struct sw_flow_mask mask; |
37a1300c | 929 | struct sk_buff *reply; |
9c52546b | 930 | struct datapath *dp; |
bc619e29 | 931 | struct sw_flow_key key; |
0c9fd022 | 932 | struct sw_flow_actions *acts; |
a1c564be | 933 | struct sw_flow_match match; |
bc619e29 | 934 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 935 | int error; |
9233cef7 | 936 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 937 | |
6740b721 | 938 | /* Must have key and actions. */ |
37a1300c | 939 | error = -EINVAL; |
a473df5b | 940 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 941 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 942 | goto error; |
a473df5b JG |
943 | } |
944 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 945 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 946 | goto error; |
a473df5b | 947 | } |
a1c564be | 948 | |
6740b721 | 949 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
950 | * locking. |
951 | */ | |
6740b721 JR |
952 | new_flow = ovs_flow_alloc(); |
953 | if (IS_ERR(new_flow)) { | |
954 | error = PTR_ERR(new_flow); | |
955 | goto error; | |
956 | } | |
957 | ||
958 | /* Extract key. */ | |
bc619e29 | 959 | ovs_match_init(&match, &key, &mask); |
038e34ab | 960 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 961 | a[OVS_FLOW_ATTR_MASK], log); |
37a1300c | 962 | if (error) |
6740b721 | 963 | goto err_kfree_flow; |
064af421 | 964 | |
ad4adec2 | 965 | ovs_flow_mask_key(&new_flow->key, &key, true, &mask); |
bc619e29 JS |
966 | |
967 | /* Extract flow identifier. */ | |
968 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
969 | &key, log); | |
970 | if (error) | |
971 | goto err_kfree_flow; | |
9b405f1a | 972 | |
6740b721 | 973 | /* Validate actions. */ |
a94ebc39 JS |
974 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
975 | &new_flow->key, &acts, log); | |
0c9fd022 | 976 | if (error) { |
7d16c847 | 977 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 978 | goto err_kfree_flow; |
6740b721 JR |
979 | } |
980 | ||
bc619e29 JS |
981 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
982 | ufid_flags); | |
6740b721 JR |
983 | if (IS_ERR(reply)) { |
984 | error = PTR_ERR(reply); | |
985 | goto err_kfree_acts; | |
37a1300c BP |
986 | } |
987 | ||
cd2a59e9 | 988 | ovs_lock(); |
a94ebc39 | 989 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
990 | if (unlikely(!dp)) { |
991 | error = -ENODEV; | |
cd2a59e9 | 992 | goto err_unlock_ovs; |
6740b721 | 993 | } |
bc619e29 | 994 | |
a1c564be | 995 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
996 | if (ovs_identifier_is_ufid(&new_flow->id)) |
997 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
998 | if (!flow) | |
999 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
6740b721 JR |
1000 | if (likely(!flow)) { |
1001 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 1002 | |
d6569377 | 1003 | /* Put flow in bucket. */ |
6740b721 JR |
1004 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1005 | if (unlikely(error)) { | |
0585f7a8 | 1006 | acts = NULL; |
6740b721 JR |
1007 | goto err_unlock_ovs; |
1008 | } | |
1009 | ||
1010 | if (unlikely(reply)) { | |
2c622e5a | 1011 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
1012 | ovs_header->dp_ifindex, |
1013 | reply, info->snd_portid, | |
1014 | info->snd_seq, 0, | |
bc619e29 JS |
1015 | OVS_FLOW_CMD_NEW, |
1016 | ufid_flags); | |
6740b721 | 1017 | BUG_ON(error < 0); |
0585f7a8 | 1018 | } |
6740b721 | 1019 | ovs_unlock(); |
d6569377 | 1020 | } else { |
0c9fd022 JR |
1021 | struct sw_flow_actions *old_acts; |
1022 | ||
d6569377 BP |
1023 | /* Bail out if we're not allowed to modify an existing flow. |
1024 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1025 | * because Generic Netlink treats the latter as a dump | |
1026 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1027 | * gets fixed. | |
1028 | */ | |
6740b721 JR |
1029 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1030 | | NLM_F_EXCL))) { | |
1031 | error = -EEXIST; | |
cd2a59e9 | 1032 | goto err_unlock_ovs; |
6740b721 | 1033 | } |
bc619e29 JS |
1034 | /* The flow identifier has to be the same for flow updates. |
1035 | * Look for any overlapping flow. | |
1036 | */ | |
1037 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1038 | if (ovs_identifier_is_key(&flow->id)) | |
1039 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1040 | &match); | |
1041 | else /* UFID matches but key is different */ | |
1042 | flow = NULL; | |
3440e4bc AW |
1043 | if (!flow) { |
1044 | error = -ENOENT; | |
1045 | goto err_unlock_ovs; | |
1046 | } | |
6740b721 | 1047 | } |
0c9fd022 JR |
1048 | /* Update actions. */ |
1049 | old_acts = ovsl_dereference(flow->sf_acts); | |
1050 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1051 | |
6740b721 | 1052 | if (unlikely(reply)) { |
2c622e5a | 1053 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1054 | ovs_header->dp_ifindex, |
1055 | reply, info->snd_portid, | |
1056 | info->snd_seq, 0, | |
bc619e29 JS |
1057 | OVS_FLOW_CMD_NEW, |
1058 | ufid_flags); | |
6740b721 JR |
1059 | BUG_ON(error < 0); |
1060 | } | |
1061 | ovs_unlock(); | |
0c9fd022 | 1062 | |
e23775f2 | 1063 | ovs_nla_free_flow_actions_rcu(old_acts); |
6740b721 | 1064 | ovs_flow_free(new_flow, false); |
0c9fd022 | 1065 | } |
6740b721 JR |
1066 | |
1067 | if (reply) | |
cb25142c | 1068 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1069 | return 0; |
1070 | ||
0c9fd022 JR |
1071 | err_unlock_ovs: |
1072 | ovs_unlock(); | |
6740b721 JR |
1073 | kfree_skb(reply); |
1074 | err_kfree_acts: | |
e23775f2 | 1075 | ovs_nla_free_flow_actions(acts); |
6740b721 JR |
1076 | err_kfree_flow: |
1077 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1078 | error: |
1079 | return error; | |
1080 | } | |
1081 | ||
cc561abf | 1082 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
a94ebc39 JS |
1083 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1084 | const struct nlattr *a, | |
cc561abf | 1085 | const struct sw_flow_key *key, |
9233cef7 JR |
1086 | const struct sw_flow_mask *mask, |
1087 | bool log) | |
cc561abf PS |
1088 | { |
1089 | struct sw_flow_actions *acts; | |
1090 | struct sw_flow_key masked_key; | |
1091 | int error; | |
1092 | ||
ad4adec2 | 1093 | ovs_flow_mask_key(&masked_key, key, true, mask); |
a94ebc39 | 1094 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
cc561abf | 1095 | if (error) { |
9233cef7 | 1096 | OVS_NLERR(log, |
7d16c847 | 1097 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1098 | return ERR_PTR(error); |
1099 | } | |
1100 | ||
1101 | return acts; | |
1102 | } | |
1103 | ||
0c9fd022 JR |
1104 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1105 | { | |
a94ebc39 | 1106 | struct net *net = sock_net(skb->sk); |
0c9fd022 JR |
1107 | struct nlattr **a = info->attrs; |
1108 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1109 | struct sw_flow_key key; |
0c9fd022 JR |
1110 | struct sw_flow *flow; |
1111 | struct sw_flow_mask mask; | |
1112 | struct sk_buff *reply = NULL; | |
1113 | struct datapath *dp; | |
6740b721 | 1114 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1115 | struct sw_flow_match match; |
bc619e29 JS |
1116 | struct sw_flow_id sfid; |
1117 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
0c9fd022 | 1118 | int error; |
9233cef7 | 1119 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1120 | bool ufid_present; |
0c9fd022 JR |
1121 | |
1122 | /* Extract key. */ | |
1123 | error = -EINVAL; | |
a473df5b | 1124 | if (!a[OVS_FLOW_ATTR_KEY]) { |
9233cef7 | 1125 | OVS_NLERR(log, "Flow key attribute not present in set flow."); |
0c9fd022 | 1126 | goto error; |
a473df5b | 1127 | } |
0c9fd022 | 1128 | |
bc619e29 | 1129 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
0c9fd022 | 1130 | ovs_match_init(&match, &key, &mask); |
038e34ab | 1131 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 1132 | a[OVS_FLOW_ATTR_MASK], log); |
0c9fd022 JR |
1133 | if (error) |
1134 | goto error; | |
d6569377 | 1135 | |
0c9fd022 JR |
1136 | /* Validate actions. */ |
1137 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
a94ebc39 JS |
1138 | acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, |
1139 | &mask, log); | |
cc561abf PS |
1140 | if (IS_ERR(acts)) { |
1141 | error = PTR_ERR(acts); | |
0c9fd022 | 1142 | goto error; |
6740b721 | 1143 | } |
6740b721 | 1144 | |
ff27161e | 1145 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1146 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1147 | ufid_flags); | |
6740b721 JR |
1148 | if (IS_ERR(reply)) { |
1149 | error = PTR_ERR(reply); | |
1150 | goto err_kfree_acts; | |
90b8c2f7 | 1151 | } |
0c9fd022 JR |
1152 | } |
1153 | ||
1154 | ovs_lock(); | |
a94ebc39 | 1155 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1156 | if (unlikely(!dp)) { |
1157 | error = -ENODEV; | |
0c9fd022 | 1158 | goto err_unlock_ovs; |
6740b721 | 1159 | } |
0c9fd022 | 1160 | /* Check that the flow exists. */ |
bc619e29 JS |
1161 | if (ufid_present) |
1162 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1163 | else | |
1164 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1165 | if (unlikely(!flow)) { |
1166 | error = -ENOENT; | |
0c9fd022 | 1167 | goto err_unlock_ovs; |
6740b721 | 1168 | } |
3440e4bc | 1169 | |
0c9fd022 | 1170 | /* Update actions, if present. */ |
6740b721 | 1171 | if (likely(acts)) { |
0c9fd022 JR |
1172 | old_acts = ovsl_dereference(flow->sf_acts); |
1173 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1174 | |
1175 | if (unlikely(reply)) { | |
2c622e5a | 1176 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1177 | ovs_header->dp_ifindex, |
1178 | reply, info->snd_portid, | |
1179 | info->snd_seq, 0, | |
bc619e29 JS |
1180 | OVS_FLOW_CMD_NEW, |
1181 | ufid_flags); | |
6740b721 JR |
1182 | BUG_ON(error < 0); |
1183 | } | |
1184 | } else { | |
1185 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1186 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
bc619e29 JS |
1187 | info, OVS_FLOW_CMD_NEW, false, |
1188 | ufid_flags); | |
1189 | ||
6740b721 JR |
1190 | if (unlikely(IS_ERR(reply))) { |
1191 | error = PTR_ERR(reply); | |
1192 | goto err_unlock_ovs; | |
1193 | } | |
9c52546b | 1194 | } |
0c9fd022 | 1195 | |
0c9fd022 JR |
1196 | /* Clear stats. */ |
1197 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1198 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1199 | ovs_unlock(); |
37a1300c | 1200 | |
6740b721 | 1201 | if (reply) |
cb25142c | 1202 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 | 1203 | if (old_acts) |
e23775f2 | 1204 | ovs_nla_free_flow_actions_rcu(old_acts); |
7d16c847 | 1205 | |
d6569377 | 1206 | return 0; |
704a1e09 | 1207 | |
cd2a59e9 PS |
1208 | err_unlock_ovs: |
1209 | ovs_unlock(); | |
6740b721 JR |
1210 | kfree_skb(reply); |
1211 | err_kfree_acts: | |
e23775f2 | 1212 | ovs_nla_free_flow_actions(acts); |
37a1300c | 1213 | error: |
9c52546b | 1214 | return error; |
704a1e09 BP |
1215 | } |
1216 | ||
df2c07f4 | 1217 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1218 | { |
37a1300c | 1219 | struct nlattr **a = info->attrs; |
df2c07f4 | 1220 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1221 | struct net *net = sock_net(skb->sk); |
37a1300c | 1222 | struct sw_flow_key key; |
37a1300c | 1223 | struct sk_buff *reply; |
704a1e09 | 1224 | struct sw_flow *flow; |
9c52546b | 1225 | struct datapath *dp; |
a1c564be | 1226 | struct sw_flow_match match; |
bc619e29 JS |
1227 | struct sw_flow_id ufid; |
1228 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1229 | int err = 0; | |
9233cef7 | 1230 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1231 | bool ufid_present; |
704a1e09 | 1232 | |
bc619e29 JS |
1233 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1234 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1235 | ovs_match_init(&match, &key, NULL); | |
038e34ab | 1236 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
bc619e29 JS |
1237 | log); |
1238 | } else if (!ufid_present) { | |
9233cef7 JR |
1239 | OVS_NLERR(log, |
1240 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1241 | err = -EINVAL; |
1b936472 | 1242 | } |
37a1300c BP |
1243 | if (err) |
1244 | return err; | |
704a1e09 | 1245 | |
cd2a59e9 | 1246 | ovs_lock(); |
2a4999f3 | 1247 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1248 | if (!dp) { |
1249 | err = -ENODEV; | |
1250 | goto unlock; | |
1251 | } | |
704a1e09 | 1252 | |
bc619e29 JS |
1253 | if (ufid_present) |
1254 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1255 | else | |
1256 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1257 | if (!flow) { |
cd2a59e9 PS |
1258 | err = -ENOENT; |
1259 | goto unlock; | |
1260 | } | |
d6569377 | 1261 | |
7d16c847 | 1262 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
bc619e29 | 1263 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
cd2a59e9 PS |
1264 | if (IS_ERR(reply)) { |
1265 | err = PTR_ERR(reply); | |
1266 | goto unlock; | |
1267 | } | |
36956a7d | 1268 | |
cd2a59e9 | 1269 | ovs_unlock(); |
37a1300c | 1270 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1271 | unlock: |
1272 | ovs_unlock(); | |
1273 | return err; | |
d6569377 | 1274 | } |
9c52546b | 1275 | |
df2c07f4 | 1276 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1277 | { |
37a1300c | 1278 | struct nlattr **a = info->attrs; |
df2c07f4 | 1279 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1280 | struct net *net = sock_net(skb->sk); |
37a1300c | 1281 | struct sw_flow_key key; |
37a1300c | 1282 | struct sk_buff *reply; |
bc619e29 | 1283 | struct sw_flow *flow = NULL; |
d6569377 | 1284 | struct datapath *dp; |
a1c564be | 1285 | struct sw_flow_match match; |
bc619e29 JS |
1286 | struct sw_flow_id ufid; |
1287 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1288 | int err; |
9233cef7 | 1289 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1290 | bool ufid_present; |
36956a7d | 1291 | |
bc619e29 JS |
1292 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1293 | if (a[OVS_FLOW_ATTR_KEY]) { | |
cde7f3ba | 1294 | ovs_match_init(&match, &key, NULL); |
038e34ab JS |
1295 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1296 | NULL, log); | |
cde7f3ba JR |
1297 | if (unlikely(err)) |
1298 | return err; | |
1299 | } | |
1300 | ||
cd2a59e9 | 1301 | ovs_lock(); |
2a4999f3 | 1302 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1303 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1304 | err = -ENODEV; |
1305 | goto unlock; | |
1306 | } | |
7d16c847 | 1307 | |
bc619e29 | 1308 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1309 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1310 | goto unlock; |
1311 | } | |
7d16c847 | 1312 | |
bc619e29 JS |
1313 | if (ufid_present) |
1314 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1315 | else | |
1316 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1317 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1318 | err = -ENOENT; |
1319 | goto unlock; | |
1320 | } | |
d6569377 | 1321 | |
994dc286 | 1322 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1323 | ovs_unlock(); |
37a1300c | 1324 | |
46051cf8 | 1325 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1326 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1327 | |
1328 | if (likely(reply)) { | |
1329 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1330 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1331 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1332 | reply, info->snd_portid, |
1333 | info->snd_seq, 0, | |
bc619e29 JS |
1334 | OVS_FLOW_CMD_DEL, |
1335 | ufid_flags); | |
cde7f3ba JR |
1336 | rcu_read_unlock(); |
1337 | BUG_ON(err < 0); | |
cb25142c | 1338 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1339 | } else { |
cb25142c PS |
1340 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1341 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1342 | ||
cde7f3ba | 1343 | } |
afad3556 | 1344 | } |
37a1300c | 1345 | |
a1c564be | 1346 | ovs_flow_free(flow, true); |
37a1300c | 1347 | return 0; |
cd2a59e9 PS |
1348 | unlock: |
1349 | ovs_unlock(); | |
1350 | return err; | |
37a1300c BP |
1351 | } |
1352 | ||
df2c07f4 | 1353 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1354 | { |
bc619e29 | 1355 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1356 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1357 | struct table_instance *ti; |
37a1300c | 1358 | struct datapath *dp; |
bc619e29 JS |
1359 | u32 ufid_flags; |
1360 | int err; | |
1361 | ||
1362 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1363 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1364 | if (err) | |
1365 | return err; | |
1366 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1367 | |
f44ccce1 | 1368 | rcu_read_lock(); |
01ac0970 | 1369 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1370 | if (!dp) { |
f44ccce1 | 1371 | rcu_read_unlock(); |
37a1300c | 1372 | return -ENODEV; |
cd2a59e9 | 1373 | } |
37a1300c | 1374 | |
994dc286 | 1375 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1376 | for (;;) { |
37a1300c BP |
1377 | struct sw_flow *flow; |
1378 | u32 bucket, obj; | |
1379 | ||
1380 | bucket = cb->args[0]; | |
1381 | obj = cb->args[1]; | |
994dc286 | 1382 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1383 | if (!flow) |
37a1300c BP |
1384 | break; |
1385 | ||
2c622e5a | 1386 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1387 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1388 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
bc619e29 | 1389 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
37a1300c BP |
1390 | break; |
1391 | ||
1392 | cb->args[0] = bucket; | |
1393 | cb->args[1] = obj; | |
1394 | } | |
f44ccce1 | 1395 | rcu_read_unlock(); |
37a1300c | 1396 | return skb->len; |
704a1e09 BP |
1397 | } |
1398 | ||
cb25142c PS |
1399 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1400 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1401 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1402 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1403 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1404 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1405 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1406 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1407 | }; |
1408 | ||
18fd3a52 | 1409 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1410 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1411 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1412 | .policy = flow_policy, | |
0c9fd022 | 1413 | .doit = ovs_flow_cmd_new |
37a1300c | 1414 | }, |
df2c07f4 | 1415 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1416 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1417 | .policy = flow_policy, | |
df2c07f4 | 1418 | .doit = ovs_flow_cmd_del |
37a1300c | 1419 | }, |
df2c07f4 | 1420 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1421 | .flags = 0, /* OK for unprivileged users. */ |
1422 | .policy = flow_policy, | |
df2c07f4 JP |
1423 | .doit = ovs_flow_cmd_get, |
1424 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1425 | }, |
df2c07f4 | 1426 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1427 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1428 | .policy = flow_policy, | |
0c9fd022 | 1429 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1430 | }, |
1431 | }; | |
1432 | ||
cb25142c | 1433 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1434 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1435 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1436 | .name = OVS_FLOW_FAMILY, |
1437 | .version = OVS_FLOW_VERSION, | |
1438 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1439 | .netnsok = true, |
cb25142c PS |
1440 | .parallel_ops = true, |
1441 | .ops = dp_flow_genl_ops, | |
1442 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1443 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1444 | .n_mcgrps = 1, | |
aaff4b55 BP |
1445 | }; |
1446 | ||
0afa2373 TG |
1447 | static size_t ovs_dp_cmd_msg_size(void) |
1448 | { | |
1449 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1450 | ||
1451 | msgsize += nla_total_size(IFNAMSIZ); | |
1452 | msgsize += nla_total_size(sizeof(struct ovs_dp_stats)); | |
4fa72a95 | 1453 | msgsize += nla_total_size(sizeof(struct ovs_dp_megaflow_stats)); |
300af20a | 1454 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1455 | |
1456 | return msgsize; | |
1457 | } | |
1458 | ||
d637497c | 1459 | /* Called with ovs_mutex. */ |
df2c07f4 | 1460 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1461 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1462 | { |
df2c07f4 | 1463 | struct ovs_header *ovs_header; |
e926dfe3 | 1464 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1465 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1466 | int err; |
1467 | ||
28aea917 | 1468 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1469 | flags, cmd); |
df2c07f4 | 1470 | if (!ovs_header) |
aaff4b55 | 1471 | goto error; |
064af421 | 1472 | |
b063d9f0 | 1473 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1474 | |
850b6b3b | 1475 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1476 | if (err) |
d6569377 | 1477 | goto nla_put_failure; |
064af421 | 1478 | |
4fa72a95 AZ |
1479 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
1480 | if (nla_put(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), | |
1481 | &dp_stats)) | |
1482 | goto nla_put_failure; | |
1483 | ||
1484 | if (nla_put(skb, OVS_DP_ATTR_MEGAFLOW_STATS, | |
1485 | sizeof(struct ovs_dp_megaflow_stats), | |
1486 | &dp_megaflow_stats)) | |
c3cc8c03 | 1487 | goto nla_put_failure; |
d6569377 | 1488 | |
c58cc9a4 TG |
1489 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1490 | goto nla_put_failure; | |
1491 | ||
23b48dc1 TG |
1492 | genlmsg_end(skb, ovs_header); |
1493 | return 0; | |
d6569377 BP |
1494 | |
1495 | nla_put_failure: | |
df2c07f4 | 1496 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1497 | error: |
1498 | return -EMSGSIZE; | |
d6569377 BP |
1499 | } |
1500 | ||
d81eef1b | 1501 | static struct sk_buff *ovs_dp_cmd_alloc_info(struct genl_info *info) |
d6569377 | 1502 | { |
d81eef1b | 1503 | return genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL); |
aaff4b55 | 1504 | } |
9dca7bd5 | 1505 | |
aa917006 | 1506 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1507 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1508 | const struct ovs_header *ovs_header, |
6455100f | 1509 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1510 | { |
254f2dc8 BP |
1511 | struct datapath *dp; |
1512 | ||
df2c07f4 | 1513 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1514 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1515 | else { |
d6569377 | 1516 | struct vport *vport; |
d6569377 | 1517 | |
2a4999f3 | 1518 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1519 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1520 | } |
254f2dc8 | 1521 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1522 | } |
1523 | ||
94358dcf TG |
1524 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1525 | { | |
1526 | struct datapath *dp; | |
1527 | ||
1528 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1529 | if (IS_ERR(dp)) |
94358dcf TG |
1530 | return; |
1531 | ||
1532 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1533 | dp->user_features = 0; | |
1534 | } | |
1535 | ||
f1f60b85 | 1536 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1537 | { |
1538 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1539 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1540 | } | |
1541 | ||
df2c07f4 | 1542 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1543 | { |
aaff4b55 | 1544 | struct nlattr **a = info->attrs; |
d6569377 | 1545 | struct vport_parms parms; |
aaff4b55 | 1546 | struct sk_buff *reply; |
d6569377 BP |
1547 | struct datapath *dp; |
1548 | struct vport *vport; | |
2a4999f3 | 1549 | struct ovs_net *ovs_net; |
95b1d73a | 1550 | int err, i; |
d6569377 | 1551 | |
d6569377 | 1552 | err = -EINVAL; |
ea36840f | 1553 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1554 | goto err; |
1555 | ||
d81eef1b JR |
1556 | reply = ovs_dp_cmd_alloc_info(info); |
1557 | if (!reply) | |
1558 | return -ENOMEM; | |
d6569377 | 1559 | |
d6569377 BP |
1560 | err = -ENOMEM; |
1561 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1562 | if (dp == NULL) | |
d81eef1b | 1563 | goto err_free_reply; |
2a4999f3 | 1564 | |
c0cddcec | 1565 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
0ceaa66c | 1566 | |
d6569377 | 1567 | /* Allocate table. */ |
994dc286 PS |
1568 | err = ovs_flow_tbl_init(&dp->table); |
1569 | if (err) | |
d6569377 BP |
1570 | goto err_free_dp; |
1571 | ||
08fb1bbd | 1572 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1573 | if (!dp->stats_percpu) { |
1574 | err = -ENOMEM; | |
1575 | goto err_destroy_table; | |
1576 | } | |
1577 | ||
95b1d73a PS |
1578 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1579 | GFP_KERNEL); | |
1580 | if (!dp->ports) { | |
1581 | err = -ENOMEM; | |
1582 | goto err_destroy_percpu; | |
1583 | } | |
1584 | ||
1585 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1586 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1587 | ||
d6569377 | 1588 | /* Set up our datapath device. */ |
df2c07f4 JP |
1589 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1590 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1591 | parms.options = NULL; |
1592 | parms.dp = dp; | |
df2c07f4 | 1593 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1594 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1595 | |
c58cc9a4 TG |
1596 | ovs_dp_change(dp, a); |
1597 | ||
d81eef1b JR |
1598 | /* So far only local changes have been made, now need the lock. */ |
1599 | ovs_lock(); | |
1600 | ||
d6569377 BP |
1601 | vport = new_vport(&parms); |
1602 | if (IS_ERR(vport)) { | |
1603 | err = PTR_ERR(vport); | |
1604 | if (err == -EBUSY) | |
1605 | err = -EEXIST; | |
1606 | ||
94358dcf TG |
1607 | if (err == -EEXIST) { |
1608 | /* An outdated user space instance that does not understand | |
1609 | * the concept of user_features has attempted to create a new | |
1610 | * datapath and is likely to reuse it. Drop all user features. | |
1611 | */ | |
1612 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1613 | ovs_dp_reset_user_features(skb, info); | |
1614 | } | |
1615 | ||
95b1d73a | 1616 | goto err_destroy_ports_array; |
d6569377 | 1617 | } |
d6569377 | 1618 | |
d81eef1b JR |
1619 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1620 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1621 | BUG_ON(err < 0); | |
aaff4b55 | 1622 | |
2a4999f3 | 1623 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1624 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
a0fb56c1 | 1625 | |
cd2a59e9 | 1626 | ovs_unlock(); |
d6569377 | 1627 | |
cb25142c | 1628 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1629 | return 0; |
1630 | ||
95b1d73a | 1631 | err_destroy_ports_array: |
d81eef1b | 1632 | ovs_unlock(); |
95b1d73a | 1633 | kfree(dp->ports); |
99769a40 JG |
1634 | err_destroy_percpu: |
1635 | free_percpu(dp->stats_percpu); | |
d6569377 | 1636 | err_destroy_table: |
e379e4d1 | 1637 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1638 | err_free_dp: |
d6569377 | 1639 | kfree(dp); |
d81eef1b JR |
1640 | err_free_reply: |
1641 | kfree_skb(reply); | |
d6569377 | 1642 | err: |
064af421 BP |
1643 | return err; |
1644 | } | |
1645 | ||
cd2a59e9 | 1646 | /* Called with ovs_mutex. */ |
2a4999f3 | 1647 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1648 | { |
95b1d73a | 1649 | int i; |
44e05eca | 1650 | |
95b1d73a PS |
1651 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1652 | struct vport *vport; | |
f8dfbcb7 | 1653 | struct hlist_node *n; |
95b1d73a | 1654 | |
f8dfbcb7 | 1655 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1656 | if (vport->port_no != OVSP_LOCAL) |
1657 | ovs_dp_detach_port(vport); | |
1658 | } | |
ed099e92 | 1659 | |
fb93e9aa | 1660 | list_del_rcu(&dp->list_node); |
ed099e92 | 1661 | |
cd2a59e9 | 1662 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1663 | * all ports in datapath are destroyed first before freeing datapath. |
1664 | */ | |
cd2a59e9 | 1665 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1666 | |
d103f479 | 1667 | /* RCU destroy the flow table */ |
ed099e92 | 1668 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1669 | } |
1670 | ||
1671 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1672 | { | |
1673 | struct sk_buff *reply; | |
1674 | struct datapath *dp; | |
1675 | int err; | |
1676 | ||
d81eef1b JR |
1677 | reply = ovs_dp_cmd_alloc_info(info); |
1678 | if (!reply) | |
1679 | return -ENOMEM; | |
1680 | ||
cd2a59e9 | 1681 | ovs_lock(); |
2a4999f3 PS |
1682 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1683 | err = PTR_ERR(dp); | |
1684 | if (IS_ERR(dp)) | |
d81eef1b | 1685 | goto err_unlock_free; |
2a4999f3 | 1686 | |
d81eef1b JR |
1687 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1688 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1689 | BUG_ON(err < 0); | |
2a4999f3 PS |
1690 | |
1691 | __dp_destroy(dp); | |
d81eef1b | 1692 | ovs_unlock(); |
7d16c847 | 1693 | |
cb25142c | 1694 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1695 | return 0; |
d81eef1b JR |
1696 | |
1697 | err_unlock_free: | |
cd2a59e9 | 1698 | ovs_unlock(); |
d81eef1b | 1699 | kfree_skb(reply); |
cd2a59e9 | 1700 | return err; |
44e05eca BP |
1701 | } |
1702 | ||
df2c07f4 | 1703 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1704 | { |
aaff4b55 | 1705 | struct sk_buff *reply; |
d6569377 | 1706 | struct datapath *dp; |
d6569377 | 1707 | int err; |
064af421 | 1708 | |
d81eef1b JR |
1709 | reply = ovs_dp_cmd_alloc_info(info); |
1710 | if (!reply) | |
1711 | return -ENOMEM; | |
1712 | ||
cd2a59e9 | 1713 | ovs_lock(); |
2a4999f3 | 1714 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1715 | err = PTR_ERR(dp); |
d6569377 | 1716 | if (IS_ERR(dp)) |
d81eef1b | 1717 | goto err_unlock_free; |
38c6ecbc | 1718 | |
c58cc9a4 TG |
1719 | ovs_dp_change(dp, info->attrs); |
1720 | ||
d81eef1b JR |
1721 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1722 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1723 | BUG_ON(err < 0); | |
a0fb56c1 | 1724 | |
cd2a59e9 | 1725 | ovs_unlock(); |
7d16c847 | 1726 | |
cb25142c | 1727 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1728 | return 0; |
d81eef1b JR |
1729 | |
1730 | err_unlock_free: | |
cd2a59e9 | 1731 | ovs_unlock(); |
d81eef1b | 1732 | kfree_skb(reply); |
cd2a59e9 | 1733 | return err; |
064af421 BP |
1734 | } |
1735 | ||
df2c07f4 | 1736 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1737 | { |
aaff4b55 | 1738 | struct sk_buff *reply; |
d6569377 | 1739 | struct datapath *dp; |
d6569377 | 1740 | int err; |
1dcf111b | 1741 | |
d81eef1b JR |
1742 | reply = ovs_dp_cmd_alloc_info(info); |
1743 | if (!reply) | |
1744 | return -ENOMEM; | |
1745 | ||
d637497c | 1746 | ovs_lock(); |
2a4999f3 | 1747 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1748 | if (IS_ERR(dp)) { |
1749 | err = PTR_ERR(dp); | |
d81eef1b | 1750 | goto err_unlock_free; |
cd2a59e9 | 1751 | } |
d81eef1b JR |
1752 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1753 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1754 | BUG_ON(err < 0); | |
d637497c | 1755 | ovs_unlock(); |
aaff4b55 BP |
1756 | |
1757 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1758 | |
d81eef1b | 1759 | err_unlock_free: |
d637497c | 1760 | ovs_unlock(); |
d81eef1b | 1761 | kfree_skb(reply); |
cd2a59e9 | 1762 | return err; |
1dcf111b JP |
1763 | } |
1764 | ||
df2c07f4 | 1765 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1766 | { |
2a4999f3 | 1767 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1768 | struct datapath *dp; |
1769 | int skip = cb->args[0]; | |
1770 | int i = 0; | |
a7786963 | 1771 | |
d637497c PS |
1772 | ovs_lock(); |
1773 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1774 | if (i >= skip && |
28aea917 | 1775 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1776 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1777 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1778 | break; |
254f2dc8 | 1779 | i++; |
a7786963 | 1780 | } |
d637497c | 1781 | ovs_unlock(); |
aaff4b55 | 1782 | |
254f2dc8 BP |
1783 | cb->args[0] = i; |
1784 | ||
aaff4b55 | 1785 | return skb->len; |
c19e6535 BP |
1786 | } |
1787 | ||
cb25142c PS |
1788 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1789 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1790 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1791 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1792 | }; | |
1793 | ||
18fd3a52 | 1794 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1795 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1796 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1797 | .policy = datapath_policy, | |
df2c07f4 | 1798 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1799 | }, |
df2c07f4 | 1800 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1801 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1802 | .policy = datapath_policy, | |
df2c07f4 | 1803 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1804 | }, |
df2c07f4 | 1805 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1806 | .flags = 0, /* OK for unprivileged users. */ |
1807 | .policy = datapath_policy, | |
df2c07f4 JP |
1808 | .doit = ovs_dp_cmd_get, |
1809 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1810 | }, |
df2c07f4 | 1811 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1812 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1813 | .policy = datapath_policy, | |
df2c07f4 | 1814 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1815 | }, |
1816 | }; | |
1817 | ||
cb25142c | 1818 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1819 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1820 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1821 | .name = OVS_DATAPATH_FAMILY, |
1822 | .version = OVS_DATAPATH_VERSION, | |
1823 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1824 | .netnsok = true, |
cb25142c PS |
1825 | .parallel_ops = true, |
1826 | .ops = dp_datapath_genl_ops, | |
1827 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1828 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1829 | .n_mcgrps = 1, | |
f0fef760 BP |
1830 | }; |
1831 | ||
cd2a59e9 | 1832 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1833 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1834 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1835 | { |
df2c07f4 | 1836 | struct ovs_header *ovs_header; |
e926dfe3 | 1837 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1838 | int err; |
1839 | ||
28aea917 | 1840 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1841 | flags, cmd); |
df2c07f4 | 1842 | if (!ovs_header) |
f0fef760 | 1843 | return -EMSGSIZE; |
c19e6535 | 1844 | |
99769a40 | 1845 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1846 | |
c3cc8c03 DM |
1847 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1848 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
e23775f2 PS |
1849 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1850 | ovs_vport_name(vport))) | |
c3cc8c03 | 1851 | goto nla_put_failure; |
c19e6535 | 1852 | |
850b6b3b | 1853 | ovs_vport_get_stats(vport, &vport_stats); |
c3cc8c03 DM |
1854 | if (nla_put(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats), |
1855 | &vport_stats)) | |
1856 | goto nla_put_failure; | |
c19e6535 | 1857 | |
beb1c69a AW |
1858 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1859 | goto nla_put_failure; | |
1860 | ||
850b6b3b | 1861 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1862 | if (err == -EMSGSIZE) |
1863 | goto error; | |
c19e6535 | 1864 | |
23b48dc1 TG |
1865 | genlmsg_end(skb, ovs_header); |
1866 | return 0; | |
c19e6535 BP |
1867 | |
1868 | nla_put_failure: | |
1869 | err = -EMSGSIZE; | |
f0fef760 | 1870 | error: |
df2c07f4 | 1871 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1872 | return err; |
064af421 BP |
1873 | } |
1874 | ||
d81eef1b JR |
1875 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1876 | { | |
1877 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1878 | } | |
1879 | ||
1880 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1881 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1882 | u32 seq, u8 cmd) |
064af421 | 1883 | { |
c19e6535 | 1884 | struct sk_buff *skb; |
f0fef760 | 1885 | int retval; |
c19e6535 | 1886 | |
f0fef760 | 1887 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1888 | if (!skb) |
1889 | return ERR_PTR(-ENOMEM); | |
1890 | ||
28aea917 | 1891 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1892 | BUG_ON(retval < 0); |
1893 | ||
c19e6535 | 1894 | return skb; |
f0fef760 | 1895 | } |
c19e6535 | 1896 | |
cd2a59e9 | 1897 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1898 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1899 | const struct ovs_header *ovs_header, |
df2c07f4 | 1900 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1901 | { |
1902 | struct datapath *dp; | |
1903 | struct vport *vport; | |
1904 | ||
df2c07f4 | 1905 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1906 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1907 | if (!vport) |
c19e6535 | 1908 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1909 | if (ovs_header->dp_ifindex && |
1910 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1911 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1912 | return vport; |
df2c07f4 JP |
1913 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1914 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1915 | |
1916 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1917 | return ERR_PTR(-EFBIG); |
c19e6535 | 1918 | |
2a4999f3 | 1919 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1920 | if (!dp) |
1921 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1922 | |
cd2a59e9 | 1923 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1924 | if (!vport) |
17535c57 | 1925 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1926 | return vport; |
1927 | } else | |
1928 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1929 | } |
1930 | ||
df2c07f4 | 1931 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1932 | { |
f0fef760 | 1933 | struct nlattr **a = info->attrs; |
df2c07f4 | 1934 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1935 | struct vport_parms parms; |
ed099e92 | 1936 | struct sk_buff *reply; |
c19e6535 | 1937 | struct vport *vport; |
c19e6535 | 1938 | struct datapath *dp; |
b0ec0f27 | 1939 | u32 port_no; |
c19e6535 | 1940 | int err; |
b0ec0f27 | 1941 | |
ea36840f BP |
1942 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1943 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1944 | return -EINVAL; |
1945 | ||
1946 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1947 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1948 | if (port_no >= DP_MAX_PORTS) | |
1949 | return -EFBIG; | |
1950 | ||
1951 | reply = ovs_vport_cmd_alloc_info(); | |
1952 | if (!reply) | |
1953 | return -ENOMEM; | |
f0fef760 | 1954 | |
cd2a59e9 | 1955 | ovs_lock(); |
5a38795f | 1956 | restart: |
2a4999f3 | 1957 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1958 | err = -ENODEV; |
1959 | if (!dp) | |
d81eef1b | 1960 | goto exit_unlock_free; |
c19e6535 | 1961 | |
d81eef1b | 1962 | if (port_no) { |
cd2a59e9 | 1963 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1964 | err = -EBUSY; |
1965 | if (vport) | |
d81eef1b | 1966 | goto exit_unlock_free; |
c19e6535 BP |
1967 | } else { |
1968 | for (port_no = 1; ; port_no++) { | |
1969 | if (port_no >= DP_MAX_PORTS) { | |
1970 | err = -EFBIG; | |
d81eef1b | 1971 | goto exit_unlock_free; |
c19e6535 | 1972 | } |
cd2a59e9 | 1973 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
1974 | if (!vport) |
1975 | break; | |
51d4d598 | 1976 | } |
064af421 | 1977 | } |
b0ec0f27 | 1978 | |
df2c07f4 JP |
1979 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1980 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1981 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1982 | parms.dp = dp; |
1983 | parms.port_no = port_no; | |
beb1c69a | 1984 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
1985 | |
1986 | vport = new_vport(&parms); | |
1987 | err = PTR_ERR(vport); | |
5a38795f TG |
1988 | if (IS_ERR(vport)) { |
1989 | if (err == -EAGAIN) | |
1990 | goto restart; | |
d81eef1b | 1991 | goto exit_unlock_free; |
5a38795f | 1992 | } |
c19e6535 | 1993 | |
d81eef1b JR |
1994 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
1995 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
1996 | BUG_ON(err < 0); | |
1997 | ovs_unlock(); | |
e297c6b7 | 1998 | |
cb25142c | 1999 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2000 | return 0; |
c19e6535 | 2001 | |
d81eef1b | 2002 | exit_unlock_free: |
cd2a59e9 | 2003 | ovs_unlock(); |
d81eef1b | 2004 | kfree_skb(reply); |
c19e6535 | 2005 | return err; |
44e05eca BP |
2006 | } |
2007 | ||
df2c07f4 | 2008 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2009 | { |
f0fef760 BP |
2010 | struct nlattr **a = info->attrs; |
2011 | struct sk_buff *reply; | |
c19e6535 | 2012 | struct vport *vport; |
c19e6535 | 2013 | int err; |
44e05eca | 2014 | |
d81eef1b JR |
2015 | reply = ovs_vport_cmd_alloc_info(); |
2016 | if (!reply) | |
2017 | return -ENOMEM; | |
2018 | ||
cd2a59e9 | 2019 | ovs_lock(); |
2a4999f3 | 2020 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2021 | err = PTR_ERR(vport); |
2022 | if (IS_ERR(vport)) | |
d81eef1b | 2023 | goto exit_unlock_free; |
44e05eca | 2024 | |
6455100f | 2025 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2026 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2027 | err = -EINVAL; |
d81eef1b | 2028 | goto exit_unlock_free; |
c25ea534 JG |
2029 | } |
2030 | ||
17ec1d04 | 2031 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2032 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 2033 | if (err) |
d81eef1b | 2034 | goto exit_unlock_free; |
17ec1d04 | 2035 | } |
1fc7083d | 2036 | |
beb1c69a | 2037 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
2038 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
2039 | ||
2040 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
2041 | if (err) |
2042 | goto exit_unlock_free; | |
2043 | } | |
c19e6535 | 2044 | |
c25ea534 JG |
2045 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2046 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2047 | BUG_ON(err < 0); | |
cd2a59e9 | 2048 | ovs_unlock(); |
d81eef1b | 2049 | |
cb25142c | 2050 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2051 | return 0; |
2052 | ||
d81eef1b | 2053 | exit_unlock_free: |
cd2a59e9 | 2054 | ovs_unlock(); |
d81eef1b | 2055 | kfree_skb(reply); |
c19e6535 | 2056 | return err; |
064af421 BP |
2057 | } |
2058 | ||
df2c07f4 | 2059 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2060 | { |
f0fef760 BP |
2061 | struct nlattr **a = info->attrs; |
2062 | struct sk_buff *reply; | |
c19e6535 | 2063 | struct vport *vport; |
c19e6535 BP |
2064 | int err; |
2065 | ||
d81eef1b JR |
2066 | reply = ovs_vport_cmd_alloc_info(); |
2067 | if (!reply) | |
2068 | return -ENOMEM; | |
2069 | ||
cd2a59e9 | 2070 | ovs_lock(); |
2a4999f3 | 2071 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2072 | err = PTR_ERR(vport); |
f0fef760 | 2073 | if (IS_ERR(vport)) |
d81eef1b | 2074 | goto exit_unlock_free; |
c19e6535 | 2075 | |
df2c07f4 | 2076 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2077 | err = -EINVAL; |
d81eef1b | 2078 | goto exit_unlock_free; |
f0fef760 BP |
2079 | } |
2080 | ||
d81eef1b JR |
2081 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2082 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2083 | BUG_ON(err < 0); | |
850b6b3b | 2084 | ovs_dp_detach_port(vport); |
d81eef1b | 2085 | ovs_unlock(); |
f0fef760 | 2086 | |
cb25142c | 2087 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2088 | return 0; |
f0fef760 | 2089 | |
d81eef1b | 2090 | exit_unlock_free: |
cd2a59e9 | 2091 | ovs_unlock(); |
d81eef1b | 2092 | kfree_skb(reply); |
c19e6535 | 2093 | return err; |
7c40efc9 BP |
2094 | } |
2095 | ||
df2c07f4 | 2096 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2097 | { |
f0fef760 | 2098 | struct nlattr **a = info->attrs; |
df2c07f4 | 2099 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2100 | struct sk_buff *reply; |
c19e6535 | 2101 | struct vport *vport; |
c19e6535 BP |
2102 | int err; |
2103 | ||
d81eef1b JR |
2104 | reply = ovs_vport_cmd_alloc_info(); |
2105 | if (!reply) | |
2106 | return -ENOMEM; | |
2107 | ||
ed099e92 | 2108 | rcu_read_lock(); |
2a4999f3 | 2109 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2110 | err = PTR_ERR(vport); |
2111 | if (IS_ERR(vport)) | |
d81eef1b JR |
2112 | goto exit_unlock_free; |
2113 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2114 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2115 | BUG_ON(err < 0); | |
df2fa9b5 JG |
2116 | rcu_read_unlock(); |
2117 | ||
2118 | return genlmsg_reply(reply, info); | |
ed099e92 | 2119 | |
d81eef1b | 2120 | exit_unlock_free: |
ed099e92 | 2121 | rcu_read_unlock(); |
d81eef1b | 2122 | kfree_skb(reply); |
c19e6535 BP |
2123 | return err; |
2124 | } | |
2125 | ||
df2c07f4 | 2126 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2127 | { |
df2c07f4 | 2128 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2129 | struct datapath *dp; |
95b1d73a PS |
2130 | int bucket = cb->args[0], skip = cb->args[1]; |
2131 | int i, j = 0; | |
c19e6535 | 2132 | |
03fc2881 | 2133 | rcu_read_lock(); |
01ac0970 | 2134 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2135 | if (!dp) { |
2136 | rcu_read_unlock(); | |
f0fef760 | 2137 | return -ENODEV; |
03fc2881 | 2138 | } |
95b1d73a | 2139 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2140 | struct vport *vport; |
95b1d73a PS |
2141 | |
2142 | j = 0; | |
f8dfbcb7 | 2143 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2144 | if (j >= skip && |
2145 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2146 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2147 | cb->nlh->nlmsg_seq, |
2148 | NLM_F_MULTI, | |
2149 | OVS_VPORT_CMD_NEW) < 0) | |
2150 | goto out; | |
2151 | ||
2152 | j++; | |
2153 | } | |
2154 | skip = 0; | |
c19e6535 | 2155 | } |
95b1d73a | 2156 | out: |
ed099e92 | 2157 | rcu_read_unlock(); |
c19e6535 | 2158 | |
95b1d73a PS |
2159 | cb->args[0] = i; |
2160 | cb->args[1] = j; | |
f0fef760 | 2161 | |
95b1d73a | 2162 | return skb->len; |
7c40efc9 BP |
2163 | } |
2164 | ||
cb25142c PS |
2165 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2166 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2167 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2168 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2169 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2170 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2171 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2172 | }; | |
2173 | ||
18fd3a52 | 2174 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2175 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
2176 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2177 | .policy = vport_policy, | |
df2c07f4 | 2178 | .doit = ovs_vport_cmd_new |
f0fef760 | 2179 | }, |
df2c07f4 | 2180 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
2181 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2182 | .policy = vport_policy, | |
df2c07f4 | 2183 | .doit = ovs_vport_cmd_del |
f0fef760 | 2184 | }, |
df2c07f4 | 2185 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2186 | .flags = 0, /* OK for unprivileged users. */ |
2187 | .policy = vport_policy, | |
df2c07f4 JP |
2188 | .doit = ovs_vport_cmd_get, |
2189 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2190 | }, |
df2c07f4 | 2191 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
2192 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2193 | .policy = vport_policy, | |
df2c07f4 | 2194 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2195 | }, |
2196 | }; | |
2197 | ||
cb25142c PS |
2198 | struct genl_family dp_vport_genl_family = { |
2199 | .id = GENL_ID_GENERATE, | |
2200 | .hdrsize = sizeof(struct ovs_header), | |
2201 | .name = OVS_VPORT_FAMILY, | |
2202 | .version = OVS_VPORT_VERSION, | |
2203 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2204 | .netnsok = true, | |
2205 | .parallel_ops = true, | |
2206 | .ops = dp_vport_genl_ops, | |
2207 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2208 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2209 | .n_mcgrps = 1, | |
982b8810 | 2210 | }; |
ed099e92 | 2211 | |
18fd3a52 | 2212 | static struct genl_family *dp_genl_families[] = { |
cb25142c PS |
2213 | &dp_datapath_genl_family, |
2214 | &dp_vport_genl_family, | |
2215 | &dp_flow_genl_family, | |
2216 | &dp_packet_genl_family, | |
982b8810 | 2217 | }; |
ed099e92 | 2218 | |
982b8810 BP |
2219 | static void dp_unregister_genl(int n_families) |
2220 | { | |
2221 | int i; | |
ed099e92 | 2222 | |
b867ca75 | 2223 | for (i = 0; i < n_families; i++) |
cb25142c | 2224 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2225 | } |
2226 | ||
982b8810 | 2227 | static int dp_register_genl(void) |
064af421 | 2228 | { |
982b8810 BP |
2229 | int err; |
2230 | int i; | |
064af421 | 2231 | |
982b8810 | 2232 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2233 | |
cb25142c | 2234 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2235 | if (err) |
2236 | goto error; | |
982b8810 | 2237 | } |
9cc8b4e4 | 2238 | |
982b8810 | 2239 | return 0; |
064af421 BP |
2240 | |
2241 | error: | |
cb25142c | 2242 | dp_unregister_genl(i); |
982b8810 | 2243 | return err; |
064af421 BP |
2244 | } |
2245 | ||
2a4999f3 PS |
2246 | static int __net_init ovs_init_net(struct net *net) |
2247 | { | |
2248 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2249 | ||
2250 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2251 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
038e34ab | 2252 | ovs_ct_init(net); |
2a4999f3 PS |
2253 | return 0; |
2254 | } | |
2255 | ||
cabd5516 PS |
2256 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2257 | struct list_head *head) | |
2a4999f3 PS |
2258 | { |
2259 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2260 | struct datapath *dp; |
2261 | ||
2262 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2263 | int i; | |
2264 | ||
2265 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2266 | struct vport *vport; | |
2267 | ||
2268 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
cabd5516 PS |
2269 | |
2270 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2271 | continue; | |
2272 | ||
e23775f2 | 2273 | if (dev_net(vport->dev) == dnet) |
cabd5516 PS |
2274 | list_add(&vport->detach_list, head); |
2275 | } | |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | ||
2280 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2281 | { | |
2282 | struct datapath *dp, *dp_next; | |
2283 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2284 | struct vport *vport, *vport_next; | |
2285 | struct net *net; | |
2286 | LIST_HEAD(head); | |
2a4999f3 | 2287 | |
038e34ab | 2288 | ovs_ct_exit(dnet); |
cd2a59e9 PS |
2289 | ovs_lock(); |
2290 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2291 | __dp_destroy(dp); | |
cabd5516 PS |
2292 | |
2293 | rtnl_lock(); | |
2294 | for_each_net(net) | |
2295 | list_vports_from_net(net, dnet, &head); | |
2296 | rtnl_unlock(); | |
2297 | ||
2298 | /* Detach all vports from given namespace. */ | |
2299 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2300 | list_del(&vport->detach_list); | |
2301 | ovs_dp_detach_port(vport); | |
2302 | } | |
2303 | ||
cd2a59e9 PS |
2304 | ovs_unlock(); |
2305 | ||
2306 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2307 | } |
2308 | ||
2309 | static struct pernet_operations ovs_net_ops = { | |
2310 | .init = ovs_init_net, | |
2311 | .exit = ovs_exit_net, | |
2312 | .id = &ovs_net_id, | |
2313 | .size = sizeof(struct ovs_net), | |
2314 | }; | |
2315 | ||
22d24ebf BP |
2316 | static int __init dp_init(void) |
2317 | { | |
2318 | int err; | |
2319 | ||
f3d85db3 | 2320 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2321 | |
26bfaeaa | 2322 | pr_info("Open vSwitch switching datapath %s\n", VERSION); |
064af421 | 2323 | |
595e069a | 2324 | err = compat_init(); |
3544358a | 2325 | if (err) |
533e96e7 | 2326 | goto error; |
3544358a | 2327 | |
595e069a JS |
2328 | err = action_fifos_init(); |
2329 | if (err) | |
2330 | goto error_compat_exit; | |
2331 | ||
5282e284 | 2332 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2333 | if (err) |
2334 | goto error_action_fifos_exit; | |
2335 | ||
5282e284 TG |
2336 | err = ovs_flow_init(); |
2337 | if (err) | |
2338 | goto error_unreg_rtnl_link; | |
2339 | ||
850b6b3b | 2340 | err = ovs_vport_init(); |
064af421 BP |
2341 | if (err) |
2342 | goto error_flow_exit; | |
2343 | ||
2a4999f3 | 2344 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2345 | if (err) |
2346 | goto error_vport_exit; | |
2347 | ||
2a4999f3 PS |
2348 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2349 | if (err) | |
2350 | goto error_netns_exit; | |
2351 | ||
5a38795f TG |
2352 | err = ovs_netdev_init(); |
2353 | if (err) | |
2354 | goto error_unreg_notifier; | |
2355 | ||
982b8810 BP |
2356 | err = dp_register_genl(); |
2357 | if (err < 0) | |
5a38795f | 2358 | goto error_unreg_netdev; |
982b8810 | 2359 | |
064af421 BP |
2360 | return 0; |
2361 | ||
5a38795f TG |
2362 | error_unreg_netdev: |
2363 | ovs_netdev_exit(); | |
064af421 | 2364 | error_unreg_notifier: |
850b6b3b | 2365 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2366 | error_netns_exit: |
2367 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2368 | error_vport_exit: |
850b6b3b | 2369 | ovs_vport_exit(); |
064af421 | 2370 | error_flow_exit: |
850b6b3b | 2371 | ovs_flow_exit(); |
5282e284 TG |
2372 | error_unreg_rtnl_link: |
2373 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2374 | error_action_fifos_exit: |
2375 | action_fifos_exit(); | |
595e069a JS |
2376 | error_compat_exit: |
2377 | compat_exit(); | |
064af421 BP |
2378 | error: |
2379 | return err; | |
2380 | } | |
2381 | ||
2382 | static void dp_cleanup(void) | |
2383 | { | |
982b8810 | 2384 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2385 | ovs_netdev_exit(); |
850b6b3b | 2386 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2387 | unregister_pernet_device(&ovs_net_ops); |
2388 | rcu_barrier(); | |
850b6b3b JG |
2389 | ovs_vport_exit(); |
2390 | ovs_flow_exit(); | |
5282e284 | 2391 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2392 | action_fifos_exit(); |
595e069a | 2393 | compat_exit(); |
064af421 BP |
2394 | } |
2395 | ||
2396 | module_init(dp_init); | |
2397 | module_exit(dp_cleanup); | |
2398 | ||
2399 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2400 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2401 | MODULE_VERSION(VERSION); |