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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 | { |
0643a78b | 98 | genl_notify(family, skb, info, GROUP_ID(grp), GFP_KERNEL); |
e297c6b7 TG |
99 | } |
100 | ||
ed099e92 BP |
101 | /** |
102 | * DOC: Locking: | |
064af421 | 103 | * |
cd2a59e9 PS |
104 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
105 | * operations on vports, etc.), Writes to other state (flow table | |
106 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
107 | * by ovs_lock. | |
ed099e92 BP |
108 | * |
109 | * Reads are protected by RCU. | |
110 | * | |
111 | * There are a few special cases (mostly stats) that have their own | |
112 | * synchronization but they nest under all of above and don't interact with | |
113 | * each other. | |
cd2a59e9 PS |
114 | * |
115 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 116 | */ |
ed099e92 | 117 | |
cd2a59e9 PS |
118 | static DEFINE_MUTEX(ovs_mutex); |
119 | ||
120 | void ovs_lock(void) | |
121 | { | |
122 | mutex_lock(&ovs_mutex); | |
123 | } | |
124 | ||
125 | void ovs_unlock(void) | |
126 | { | |
127 | mutex_unlock(&ovs_mutex); | |
128 | } | |
129 | ||
130 | #ifdef CONFIG_LOCKDEP | |
131 | int lockdep_ovsl_is_held(void) | |
132 | { | |
133 | if (debug_locks) | |
134 | return lockdep_is_held(&ovs_mutex); | |
135 | else | |
136 | return 1; | |
137 | } | |
5a38795f | 138 | EXPORT_SYMBOL_GPL(lockdep_ovsl_is_held); |
cd2a59e9 PS |
139 | #endif |
140 | ||
5ae440c3 | 141 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 | 142 | const struct sw_flow_key *, |
4c7804f1 WT |
143 | const struct dp_upcall_info *, |
144 | uint32_t cutlen); | |
5ae440c3 | 145 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7d16c847 | 146 | const struct sw_flow_key *, |
4c7804f1 WT |
147 | const struct dp_upcall_info *, |
148 | uint32_t cutlen); | |
064af421 | 149 | |
01ac0970 AZ |
150 | /* Must be called with rcu_read_lock. */ |
151 | static struct datapath *get_dp_rcu(struct net *net, int dp_ifindex) | |
064af421 | 152 | { |
01ac0970 | 153 | struct net_device *dev = dev_get_by_index_rcu(net, dp_ifindex); |
ed099e92 | 154 | |
254f2dc8 | 155 | if (dev) { |
850b6b3b | 156 | struct vport *vport = ovs_internal_dev_get_vport(dev); |
254f2dc8 | 157 | if (vport) |
01ac0970 | 158 | return vport->dp; |
254f2dc8 | 159 | } |
01ac0970 AZ |
160 | |
161 | return NULL; | |
162 | } | |
163 | ||
164 | /* The caller must hold either ovs_mutex or rcu_read_lock to keep the | |
af465b67 PS |
165 | * returned dp pointer valid. |
166 | */ | |
01ac0970 AZ |
167 | static inline struct datapath *get_dp(struct net *net, int dp_ifindex) |
168 | { | |
169 | struct datapath *dp; | |
170 | ||
171 | WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); | |
172 | rcu_read_lock(); | |
173 | dp = get_dp_rcu(net, dp_ifindex); | |
254f2dc8 BP |
174 | rcu_read_unlock(); |
175 | ||
176 | return dp; | |
064af421 | 177 | } |
064af421 | 178 | |
cd2a59e9 | 179 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 180 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 181 | { |
cd2a59e9 | 182 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
e23775f2 | 183 | return ovs_vport_name(vport); |
f2459fe7 JG |
184 | } |
185 | ||
f1f60b85 | 186 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
187 | { |
188 | struct vport *local; | |
189 | int ifindex; | |
190 | ||
191 | rcu_read_lock(); | |
192 | ||
95b1d73a | 193 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 194 | if (local) |
e23775f2 | 195 | ifindex = local->dev->ifindex; |
99769a40 JG |
196 | else |
197 | ifindex = 0; | |
198 | ||
199 | rcu_read_unlock(); | |
200 | ||
201 | return ifindex; | |
202 | } | |
203 | ||
46c6a11d JG |
204 | static void destroy_dp_rcu(struct rcu_head *rcu) |
205 | { | |
206 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 207 | |
e379e4d1 | 208 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 209 | free_percpu(dp->stats_percpu); |
95b1d73a | 210 | kfree(dp->ports); |
5ca1ba48 | 211 | kfree(dp); |
46c6a11d JG |
212 | } |
213 | ||
95b1d73a PS |
214 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
215 | u16 port_no) | |
216 | { | |
217 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
218 | } | |
219 | ||
aa917006 | 220 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
221 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
222 | { | |
223 | struct vport *vport; | |
95b1d73a PS |
224 | struct hlist_head *head; |
225 | ||
226 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 227 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
228 | if (vport->port_no == port_no) |
229 | return vport; | |
230 | } | |
231 | return NULL; | |
232 | } | |
233 | ||
cd2a59e9 | 234 | /* Called with ovs_mutex. */ |
c19e6535 | 235 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 236 | { |
f2459fe7 | 237 | struct vport *vport; |
f2459fe7 | 238 | |
850b6b3b | 239 | vport = ovs_vport_add(parms); |
c19e6535 BP |
240 | if (!IS_ERR(vport)) { |
241 | struct datapath *dp = parms->dp; | |
95b1d73a | 242 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 243 | |
95b1d73a | 244 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 245 | } |
c19e6535 | 246 | return vport; |
064af421 BP |
247 | } |
248 | ||
850b6b3b | 249 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 250 | { |
cd2a59e9 | 251 | ASSERT_OVSL(); |
064af421 | 252 | |
064af421 | 253 | /* First drop references to device. */ |
95b1d73a | 254 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 255 | |
7237e4f4 | 256 | /* Then destroy it. */ |
850b6b3b | 257 | ovs_vport_del(p); |
064af421 BP |
258 | } |
259 | ||
fb66fbd1 | 260 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 261 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 262 | { |
a6059080 | 263 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 264 | struct datapath *dp = p->dp; |
3544358a | 265 | struct sw_flow *flow; |
ad50cb60 | 266 | struct sw_flow_actions *sf_acts; |
064af421 | 267 | struct dp_stats_percpu *stats; |
e9141eec | 268 | u64 *stats_counter; |
4fa72a95 | 269 | u32 n_mask_hit; |
064af421 | 270 | |
70dbc259 | 271 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 272 | |
52a23d92 | 273 | /* Look up flow. */ |
e74d4817 | 274 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 275 | &n_mask_hit); |
52a23d92 JG |
276 | if (unlikely(!flow)) { |
277 | struct dp_upcall_info upcall; | |
a7d607c5 | 278 | int error; |
52a23d92 | 279 | |
0e469d3b | 280 | memset(&upcall, 0, sizeof(upcall)); |
52a23d92 | 281 | upcall.cmd = OVS_PACKET_CMD_MISS; |
beb1c69a | 282 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
a94ebc39 | 283 | upcall.mru = OVS_CB(skb)->mru; |
4c7804f1 | 284 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
a7d607c5 LR |
285 | if (unlikely(error)) |
286 | kfree_skb(skb); | |
287 | else | |
288 | consume_skb(skb); | |
52a23d92 JG |
289 | stats_counter = &stats->n_missed; |
290 | goto out; | |
291 | } | |
292 | ||
e74d4817 | 293 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 294 | sf_acts = rcu_dereference(flow->sf_acts); |
7d16c847 PS |
295 | ovs_execute_actions(dp, skb, sf_acts, key); |
296 | ||
b0b906cc | 297 | stats_counter = &stats->n_hit; |
55574bb0 | 298 | |
8819fac7 | 299 | out: |
55574bb0 | 300 | /* Update datapath statistics. */ |
b81deb15 | 301 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 302 | (*stats_counter)++; |
4fa72a95 | 303 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 304 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
305 | } |
306 | ||
850b6b3b | 307 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 308 | const struct sw_flow_key *key, |
4c7804f1 WT |
309 | const struct dp_upcall_info *upcall_info, |
310 | uint32_t cutlen) | |
aa5a8fdc JG |
311 | { |
312 | struct dp_stats_percpu *stats; | |
313 | int err; | |
314 | ||
28aea917 | 315 | if (upcall_info->portid == 0) { |
b063d9f0 | 316 | err = -ENOTCONN; |
b063d9f0 JG |
317 | goto err; |
318 | } | |
319 | ||
7257b535 | 320 | if (!skb_is_gso(skb)) |
4c7804f1 | 321 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
7257b535 | 322 | else |
4c7804f1 | 323 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
d76195db JG |
324 | if (err) |
325 | goto err; | |
326 | ||
327 | return 0; | |
aa5a8fdc | 328 | |
aa5a8fdc | 329 | err: |
70dbc259 | 330 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 331 | |
b81deb15 | 332 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 333 | stats->n_lost++; |
b81deb15 | 334 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 335 | |
aa5a8fdc | 336 | return err; |
982b8810 BP |
337 | } |
338 | ||
5ae440c3 | 339 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 340 | const struct sw_flow_key *key, |
4c7804f1 WT |
341 | const struct dp_upcall_info *upcall_info, |
342 | uint32_t cutlen) | |
cb5087ca | 343 | { |
d4cba1f8 | 344 | unsigned short gso_type = skb_shinfo(skb)->gso_type; |
7257b535 BP |
345 | struct sw_flow_key later_key; |
346 | struct sk_buff *segs, *nskb; | |
b2a23c4e | 347 | struct ovs_skb_cb ovs_cb; |
7257b535 | 348 | int err; |
cb5087ca | 349 | |
b2a23c4e | 350 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 351 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 352 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
353 | if (IS_ERR(segs)) |
354 | return PTR_ERR(segs); | |
d1da7669 PS |
355 | if (segs == NULL) |
356 | return -EINVAL; | |
99769a40 | 357 | |
9b277b39 | 358 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 359 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
360 | * in this case is for a first fragment, so we need to |
361 | * properly mark later fragments. | |
362 | */ | |
e74d4817 | 363 | later_key = *key; |
9b277b39 PS |
364 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
365 | } | |
366 | ||
7257b535 BP |
367 | /* Queue all of the segments. */ |
368 | skb = segs; | |
cb5087ca | 369 | do { |
b2a23c4e | 370 | *OVS_CB(skb) = ovs_cb; |
9b277b39 | 371 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 372 | key = &later_key; |
9b277b39 | 373 | |
4c7804f1 | 374 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
982b8810 | 375 | if (err) |
7257b535 | 376 | break; |
856081f6 | 377 | |
36ce148c | 378 | } while ((skb = skb->next)); |
cb5087ca | 379 | |
7257b535 BP |
380 | /* Free all of the segments. */ |
381 | skb = segs; | |
382 | do { | |
383 | nskb = skb->next; | |
384 | if (err) | |
385 | kfree_skb(skb); | |
386 | else | |
387 | consume_skb(skb); | |
388 | } while ((skb = nskb)); | |
389 | return err; | |
390 | } | |
391 | ||
8b7ea2d4 | 392 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
533bea51 | 393 | unsigned int hdrlen) |
0afa2373 TG |
394 | { |
395 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 396 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
039fb36c WT |
397 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
398 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
0afa2373 TG |
399 | |
400 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
401 | if (upcall_info->userdata) |
402 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
403 | ||
404 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
405 | if (upcall_info->egress_tun_info) | |
406 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 | 407 | |
0e469d3b NM |
408 | /* OVS_PACKET_ATTR_ACTIONS */ |
409 | if (upcall_info->actions_len) | |
410 | size += nla_total_size(upcall_info->actions_len); | |
411 | ||
a94ebc39 JS |
412 | /* OVS_PACKET_ATTR_MRU */ |
413 | if (upcall_info->mru) | |
414 | size += nla_total_size(sizeof(upcall_info->mru)); | |
415 | ||
0afa2373 TG |
416 | return size; |
417 | } | |
418 | ||
a94ebc39 JS |
419 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
420 | { | |
421 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
422 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
423 | ||
424 | if (plen > 0) | |
425 | memset(skb_put(skb, plen), 0, plen); | |
426 | } | |
427 | } | |
428 | ||
5ae440c3 | 429 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 430 | const struct sw_flow_key *key, |
4c7804f1 WT |
431 | const struct dp_upcall_info *upcall_info, |
432 | uint32_t cutlen) | |
7257b535 BP |
433 | { |
434 | struct ovs_header *upcall; | |
6161d3fd | 435 | struct sk_buff *nskb = NULL; |
82706a6f | 436 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 437 | struct nlattr *nla; |
978188b2 | 438 | size_t len; |
533bea51 | 439 | unsigned int hlen; |
5ae440c3 TG |
440 | int err, dp_ifindex; |
441 | ||
442 | dp_ifindex = get_dpifindex(dp); | |
443 | if (!dp_ifindex) | |
444 | return -ENODEV; | |
7257b535 | 445 | |
efd8a18e | 446 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
447 | nskb = skb_clone(skb, GFP_ATOMIC); |
448 | if (!nskb) | |
449 | return -ENOMEM; | |
07ac71ea | 450 | |
8063e095 | 451 | nskb = __vlan_hwaccel_push_inside(nskb); |
07ac71ea PS |
452 | if (!nskb) |
453 | return -ENOMEM; | |
454 | ||
6161d3fd JG |
455 | skb = nskb; |
456 | } | |
457 | ||
458 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
459 | err = -EFBIG; | |
460 | goto out; | |
461 | } | |
7257b535 | 462 | |
533bea51 TG |
463 | /* Complete checksum if needed */ |
464 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
465 | (err = skb_checksum_help(skb))) | |
466 | goto out; | |
467 | ||
468 | /* Older versions of OVS user space enforce alignment of the last | |
469 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
470 | * padding logic. Only perform zerocopy if padding is not required. | |
471 | */ | |
472 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
473 | hlen = skb_zerocopy_headlen(skb); | |
474 | else | |
475 | hlen = skb->len; | |
476 | ||
4c7804f1 | 477 | len = upcall_msg_size(upcall_info, hlen - cutlen); |
40c08cda | 478 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
6161d3fd JG |
479 | if (!user_skb) { |
480 | err = -ENOMEM; | |
481 | goto out; | |
482 | } | |
7257b535 BP |
483 | |
484 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
485 | 0, upcall_info->cmd); | |
486 | upcall->dp_ifindex = dp_ifindex; | |
487 | ||
db7f2238 | 488 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 489 | BUG_ON(err); |
7257b535 BP |
490 | |
491 | if (upcall_info->userdata) | |
e995e3df | 492 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 493 | nla_len(upcall_info->userdata), |
e995e3df | 494 | nla_data(upcall_info->userdata)); |
7257b535 | 495 | |
e23775f2 | 496 | |
8b7ea2d4 WZ |
497 | if (upcall_info->egress_tun_info) { |
498 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
aad7cb91 PS |
499 | err = ovs_nla_put_tunnel_info(user_skb, |
500 | upcall_info->egress_tun_info); | |
8b7ea2d4 WZ |
501 | BUG_ON(err); |
502 | nla_nest_end(user_skb, nla); | |
503 | } | |
504 | ||
0e469d3b NM |
505 | if (upcall_info->actions_len) { |
506 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
507 | err = ovs_nla_put_actions(upcall_info->actions, | |
508 | upcall_info->actions_len, | |
509 | user_skb); | |
510 | if (!err) | |
511 | nla_nest_end(user_skb, nla); | |
512 | else | |
513 | nla_nest_cancel(user_skb, nla); | |
514 | } | |
515 | ||
a94ebc39 JS |
516 | /* Add OVS_PACKET_ATTR_MRU */ |
517 | if (upcall_info->mru) { | |
518 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
519 | upcall_info->mru)) { | |
520 | err = -ENOBUFS; | |
521 | goto out; | |
522 | } | |
523 | pad_packet(dp, user_skb); | |
524 | } | |
525 | ||
039fb36c WT |
526 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
527 | if (cutlen > 0) { | |
528 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
529 | skb->len)) { | |
530 | err = -ENOBUFS; | |
531 | goto out; | |
532 | } | |
533 | pad_packet(dp, user_skb); | |
534 | } | |
535 | ||
533bea51 | 536 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
537 | * in skb_zerocopy() |
538 | */ | |
533bea51 TG |
539 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
540 | err = -ENOBUFS; | |
541 | goto out; | |
542 | } | |
4c7804f1 | 543 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
bed53bd1 | 544 | |
4c7804f1 | 545 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
2c272bd9 ZK |
546 | if (err) |
547 | goto out; | |
7257b535 | 548 | |
ef507cec | 549 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
a94ebc39 | 550 | pad_packet(dp, user_skb); |
ef507cec | 551 | |
533bea51 | 552 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 553 | |
533bea51 | 554 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 555 | user_skb = NULL; |
6161d3fd | 556 | out: |
2c272bd9 ZK |
557 | if (err) |
558 | skb_tx_error(skb); | |
82706a6f | 559 | kfree_skb(user_skb); |
6161d3fd JG |
560 | kfree_skb(nskb); |
561 | return err; | |
cb5087ca BP |
562 | } |
563 | ||
df2c07f4 | 564 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 565 | { |
df2c07f4 | 566 | struct ovs_header *ovs_header = info->userhdr; |
a94ebc39 | 567 | struct net *net = sock_net(skb->sk); |
982b8810 | 568 | struct nlattr **a = info->attrs; |
e0e57990 | 569 | struct sw_flow_actions *acts; |
982b8810 | 570 | struct sk_buff *packet; |
e0e57990 | 571 | struct sw_flow *flow; |
ad50cb60 | 572 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 573 | struct datapath *dp; |
d6569377 | 574 | struct ethhdr *eth; |
a6059080 | 575 | struct vport *input_vport; |
a94ebc39 | 576 | u16 mru = 0; |
3f19d399 | 577 | int len; |
d6569377 | 578 | int err; |
2e460098 | 579 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 580 | |
f7cd0081 | 581 | err = -EINVAL; |
df2c07f4 | 582 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 583 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 584 | goto err; |
064af421 | 585 | |
df2c07f4 | 586 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 587 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
588 | err = -ENOMEM; |
589 | if (!packet) | |
e5cad958 | 590 | goto err; |
3f19d399 BP |
591 | skb_reserve(packet, NET_IP_ALIGN); |
592 | ||
bf3d6fce | 593 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 594 | |
f7cd0081 BP |
595 | skb_reset_mac_header(packet); |
596 | eth = eth_hdr(packet); | |
064af421 | 597 | |
d6569377 BP |
598 | /* Normally, setting the skb 'protocol' field would be handled by a |
599 | * call to eth_type_trans(), but it assumes there's a sending | |
af465b67 PS |
600 | * device, which we may not have. |
601 | */ | |
935fc582 | 602 | if (eth_proto_is_802_3(eth->h_proto)) |
f7cd0081 | 603 | packet->protocol = eth->h_proto; |
d6569377 | 604 | else |
f7cd0081 | 605 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 606 | |
a94ebc39 JS |
607 | /* Set packet's mru */ |
608 | if (a[OVS_PACKET_ATTR_MRU]) { | |
609 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
610 | packet->ignore_df = 1; | |
611 | } | |
612 | OVS_CB(packet)->mru = mru; | |
613 | ||
e0e57990 | 614 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 615 | flow = ovs_flow_alloc(); |
e0e57990 BP |
616 | err = PTR_ERR(flow); |
617 | if (IS_ERR(flow)) | |
e5cad958 | 618 | goto err_kfree_skb; |
064af421 | 619 | |
038e34ab JS |
620 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
621 | packet, &flow->key, log); | |
e0e57990 | 622 | if (err) |
9321954a | 623 | goto err_flow_free; |
e0e57990 | 624 | |
a94ebc39 | 625 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 626 | &flow->key, &acts, log); |
9b405f1a PS |
627 | if (err) |
628 | goto err_flow_free; | |
e0e57990 | 629 | |
ff27161e | 630 | rcu_assign_pointer(flow->sf_acts, acts); |
abff858b | 631 | packet->priority = flow->key.phy.priority; |
3025a772 | 632 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 633 | |
d6569377 | 634 | rcu_read_lock(); |
a94ebc39 | 635 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
f7cd0081 | 636 | err = -ENODEV; |
e5cad958 BP |
637 | if (!dp) |
638 | goto err_unlock; | |
cc4015df | 639 | |
a6059080 AZ |
640 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
641 | if (!input_vport) | |
642 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
643 | ||
644 | if (!input_vport) | |
645 | goto err_unlock; | |
646 | ||
e23775f2 | 647 | packet->dev = input_vport->dev; |
a6059080 | 648 | OVS_CB(packet)->input_vport = input_vport; |
ad50cb60 | 649 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 650 | |
e9141eec | 651 | local_bh_disable(); |
7d16c847 | 652 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 653 | local_bh_enable(); |
d6569377 | 654 | rcu_read_unlock(); |
e0e57990 | 655 | |
a1c564be | 656 | ovs_flow_free(flow, false); |
e5cad958 | 657 | return err; |
064af421 | 658 | |
e5cad958 BP |
659 | err_unlock: |
660 | rcu_read_unlock(); | |
9321954a | 661 | err_flow_free: |
a1c564be | 662 | ovs_flow_free(flow, false); |
e5cad958 BP |
663 | err_kfree_skb: |
664 | kfree_skb(packet); | |
665 | err: | |
d6569377 | 666 | return err; |
064af421 BP |
667 | } |
668 | ||
df2c07f4 | 669 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 670 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
671 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
672 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 673 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
a94ebc39 | 674 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
982b8810 BP |
675 | }; |
676 | ||
18fd3a52 | 677 | static struct genl_ops dp_packet_genl_ops[] = { |
df2c07f4 | 678 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
a6a8674d | 679 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
982b8810 | 680 | .policy = packet_policy, |
df2c07f4 | 681 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
682 | } |
683 | }; | |
684 | ||
cb25142c PS |
685 | static struct genl_family dp_packet_genl_family = { |
686 | .id = GENL_ID_GENERATE, | |
687 | .hdrsize = sizeof(struct ovs_header), | |
688 | .name = OVS_PACKET_FAMILY, | |
689 | .version = OVS_PACKET_VERSION, | |
690 | .maxattr = OVS_PACKET_ATTR_MAX, | |
691 | .netnsok = true, | |
692 | .parallel_ops = true, | |
693 | .ops = dp_packet_genl_ops, | |
694 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
695 | }; | |
696 | ||
f1f60b85 | 697 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 698 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 699 | { |
d6569377 | 700 | int i; |
f180c2e2 | 701 | |
4fa72a95 AZ |
702 | memset(mega_stats, 0, sizeof(*mega_stats)); |
703 | ||
994dc286 | 704 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 705 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 706 | |
7257b535 | 707 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 708 | |
d6569377 BP |
709 | for_each_possible_cpu(i) { |
710 | const struct dp_stats_percpu *percpu_stats; | |
711 | struct dp_stats_percpu local_stats; | |
821cb9fa | 712 | unsigned int start; |
44e05eca | 713 | |
d6569377 | 714 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 715 | |
d6569377 | 716 | do { |
b81deb15 | 717 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 718 | local_stats = *percpu_stats; |
b81deb15 | 719 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 720 | |
d6569377 BP |
721 | stats->n_hit += local_stats.n_hit; |
722 | stats->n_missed += local_stats.n_missed; | |
723 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 724 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
725 | } |
726 | } | |
064af421 | 727 | |
bc619e29 JS |
728 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
729 | { | |
730 | return ovs_identifier_is_ufid(sfid) && | |
731 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
732 | } | |
733 | ||
734 | static bool should_fill_mask(uint32_t ufid_flags) | |
735 | { | |
736 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
737 | } | |
738 | ||
739 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 740 | { |
bc619e29 JS |
741 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
742 | } | |
743 | ||
744 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
745 | const struct sw_flow_id *sfid, | |
746 | uint32_t ufid_flags) | |
747 | { | |
748 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
749 | ||
750 | /* OVS_FLOW_ATTR_UFID */ | |
751 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
752 | len += nla_total_size(sfid->ufid_len); | |
753 | ||
754 | /* OVS_FLOW_ATTR_KEY */ | |
755 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
756 | len += nla_total_size(ovs_key_attr_size()); | |
757 | ||
758 | /* OVS_FLOW_ATTR_MASK */ | |
759 | if (should_fill_mask(ufid_flags)) | |
760 | len += nla_total_size(ovs_key_attr_size()); | |
761 | ||
762 | /* OVS_FLOW_ATTR_ACTIONS */ | |
763 | if (should_fill_actions(ufid_flags)) | |
c3bb15b3 | 764 | len += nla_total_size(acts->orig_len); |
bc619e29 JS |
765 | |
766 | return len | |
91b37647 | 767 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
0afa2373 | 768 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
91b37647 | 769 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
770 | } |
771 | ||
f1948bb9 JS |
772 | /* Called with ovs_mutex or RCU read lock. */ |
773 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
774 | struct sk_buff *skb) | |
775 | { | |
776 | struct ovs_flow_stats stats; | |
777 | __be16 tcp_flags; | |
778 | unsigned long used; | |
779 | ||
b0f3a2fe | 780 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 781 | |
b0f3a2fe | 782 | if (used && |
89be7da8 PS |
783 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
784 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 785 | return -EMSGSIZE; |
d6569377 | 786 | |
b0f3a2fe | 787 | if (stats.n_packets && |
91b37647 PS |
788 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
789 | sizeof(struct ovs_flow_stats), &stats, | |
790 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 791 | return -EMSGSIZE; |
b0b906cc | 792 | |
b0f3a2fe PS |
793 | if ((u8)ntohs(tcp_flags) && |
794 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
795 | return -EMSGSIZE; |
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
800 | /* Called with ovs_mutex or RCU read lock. */ | |
801 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
802 | struct sk_buff *skb, int skb_orig_len) | |
803 | { | |
804 | struct nlattr *start; | |
805 | int err; | |
d6569377 | 806 | |
df2c07f4 | 807 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
808 | * this is the first flow to be dumped into 'skb'. This is unusual for |
809 | * Netlink but individual action lists can be longer than | |
810 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
811 | * The userspace caller can always fetch the actions separately if it | |
812 | * really wants them. (Most userspace callers in fact don't care.) | |
813 | * | |
814 | * This can only fail for dump operations because the skb is always | |
815 | * properly sized for single flows. | |
816 | */ | |
9b405f1a | 817 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 818 | if (start) { |
f44ccce1 PS |
819 | const struct sw_flow_actions *sf_acts; |
820 | ||
780ec6ae | 821 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
822 | err = ovs_nla_put_actions(sf_acts->actions, |
823 | sf_acts->actions_len, skb); | |
f71db6b1 | 824 | |
0a25b039 BP |
825 | if (!err) |
826 | nla_nest_end(skb, start); | |
827 | else { | |
828 | if (skb_orig_len) | |
f1948bb9 | 829 | return err; |
0a25b039 BP |
830 | |
831 | nla_nest_cancel(skb, start); | |
832 | } | |
f1948bb9 JS |
833 | } else if (skb_orig_len) { |
834 | return -EMSGSIZE; | |
835 | } | |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
840 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 841 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 842 | struct sk_buff *skb, u32 portid, |
bc619e29 | 843 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
844 | { |
845 | const int skb_orig_len = skb->len; | |
846 | struct ovs_header *ovs_header; | |
847 | int err; | |
848 | ||
7d16c847 PS |
849 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
850 | flags, cmd); | |
f1948bb9 JS |
851 | if (!ovs_header) |
852 | return -EMSGSIZE; | |
7d16c847 | 853 | |
f1948bb9 JS |
854 | ovs_header->dp_ifindex = dp_ifindex; |
855 | ||
bc619e29 | 856 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
857 | if (err) |
858 | goto error; | |
859 | ||
bc619e29 JS |
860 | if (should_fill_key(&flow->id, ufid_flags)) { |
861 | err = ovs_nla_put_masked_key(flow, skb); | |
862 | if (err) | |
863 | goto error; | |
864 | } | |
865 | ||
866 | if (should_fill_mask(ufid_flags)) { | |
867 | err = ovs_nla_put_mask(flow, skb); | |
868 | if (err) | |
869 | goto error; | |
870 | } | |
f1948bb9 JS |
871 | |
872 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
873 | if (err) | |
874 | goto error; | |
875 | ||
bc619e29 JS |
876 | if (should_fill_actions(ufid_flags)) { |
877 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
878 | if (err) | |
879 | goto error; | |
880 | } | |
37a1300c | 881 | |
23b48dc1 TG |
882 | genlmsg_end(skb, ovs_header); |
883 | return 0; | |
d6569377 | 884 | |
37a1300c | 885 | error: |
df2c07f4 | 886 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 887 | return err; |
44e05eca BP |
888 | } |
889 | ||
f71db6b1 JR |
890 | /* May not be called with RCU read lock. */ |
891 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 892 | const struct sw_flow_id *sfid, |
afad3556 | 893 | struct genl_info *info, |
bc619e29 JS |
894 | bool always, |
895 | uint32_t ufid_flags) | |
44e05eca | 896 | { |
afad3556 | 897 | struct sk_buff *skb; |
bc619e29 | 898 | size_t len; |
d6569377 | 899 | |
114fce23 SG |
900 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
901 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
902 | return NULL; |
903 | ||
bc619e29 | 904 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
40c08cda | 905 | skb = genlmsg_new(len, GFP_KERNEL); |
afad3556 JR |
906 | if (!skb) |
907 | return ERR_PTR(-ENOMEM); | |
908 | ||
909 | return skb; | |
37a1300c | 910 | } |
8d5ebd83 | 911 | |
f71db6b1 | 912 | /* Called with ovs_mutex. */ |
7d16c847 | 913 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
914 | int dp_ifindex, |
915 | struct genl_info *info, u8 cmd, | |
bc619e29 | 916 | bool always, u32 ufid_flags) |
37a1300c BP |
917 | { |
918 | struct sk_buff *skb; | |
919 | int retval; | |
d6569377 | 920 | |
bc619e29 JS |
921 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
922 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 923 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 924 | return skb; |
d6569377 | 925 | |
2c622e5a | 926 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 927 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 928 | cmd, ufid_flags); |
37a1300c | 929 | BUG_ON(retval < 0); |
d6569377 | 930 | return skb; |
064af421 BP |
931 | } |
932 | ||
0c9fd022 | 933 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 934 | { |
a94ebc39 | 935 | struct net *net = sock_net(skb->sk); |
37a1300c | 936 | struct nlattr **a = info->attrs; |
df2c07f4 | 937 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 938 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 939 | struct sw_flow_mask mask; |
37a1300c | 940 | struct sk_buff *reply; |
9c52546b | 941 | struct datapath *dp; |
bc619e29 | 942 | struct sw_flow_key key; |
0c9fd022 | 943 | struct sw_flow_actions *acts; |
a1c564be | 944 | struct sw_flow_match match; |
bc619e29 | 945 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 946 | int error; |
9233cef7 | 947 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 948 | |
6740b721 | 949 | /* Must have key and actions. */ |
37a1300c | 950 | error = -EINVAL; |
a473df5b | 951 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 952 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 953 | goto error; |
a473df5b JG |
954 | } |
955 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 956 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 957 | goto error; |
a473df5b | 958 | } |
a1c564be | 959 | |
6740b721 | 960 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
961 | * locking. |
962 | */ | |
6740b721 JR |
963 | new_flow = ovs_flow_alloc(); |
964 | if (IS_ERR(new_flow)) { | |
965 | error = PTR_ERR(new_flow); | |
966 | goto error; | |
967 | } | |
968 | ||
969 | /* Extract key. */ | |
bc619e29 | 970 | ovs_match_init(&match, &key, &mask); |
038e34ab | 971 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 972 | a[OVS_FLOW_ATTR_MASK], log); |
37a1300c | 973 | if (error) |
6740b721 | 974 | goto err_kfree_flow; |
064af421 | 975 | |
ad4adec2 | 976 | ovs_flow_mask_key(&new_flow->key, &key, true, &mask); |
bc619e29 JS |
977 | |
978 | /* Extract flow identifier. */ | |
979 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
980 | &key, log); | |
981 | if (error) | |
982 | goto err_kfree_flow; | |
9b405f1a | 983 | |
6740b721 | 984 | /* Validate actions. */ |
a94ebc39 JS |
985 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
986 | &new_flow->key, &acts, log); | |
0c9fd022 | 987 | if (error) { |
7d16c847 | 988 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 989 | goto err_kfree_flow; |
6740b721 JR |
990 | } |
991 | ||
bc619e29 JS |
992 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
993 | ufid_flags); | |
6740b721 JR |
994 | if (IS_ERR(reply)) { |
995 | error = PTR_ERR(reply); | |
996 | goto err_kfree_acts; | |
37a1300c BP |
997 | } |
998 | ||
cd2a59e9 | 999 | ovs_lock(); |
a94ebc39 | 1000 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1001 | if (unlikely(!dp)) { |
1002 | error = -ENODEV; | |
cd2a59e9 | 1003 | goto err_unlock_ovs; |
6740b721 | 1004 | } |
bc619e29 | 1005 | |
a1c564be | 1006 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
1007 | if (ovs_identifier_is_ufid(&new_flow->id)) |
1008 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
1009 | if (!flow) | |
1010 | flow = ovs_flow_tbl_lookup(&dp->table, &key); | |
6740b721 JR |
1011 | if (likely(!flow)) { |
1012 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 1013 | |
d6569377 | 1014 | /* Put flow in bucket. */ |
6740b721 JR |
1015 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1016 | if (unlikely(error)) { | |
0585f7a8 | 1017 | acts = NULL; |
6740b721 JR |
1018 | goto err_unlock_ovs; |
1019 | } | |
1020 | ||
1021 | if (unlikely(reply)) { | |
2c622e5a | 1022 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
1023 | ovs_header->dp_ifindex, |
1024 | reply, info->snd_portid, | |
1025 | info->snd_seq, 0, | |
bc619e29 JS |
1026 | OVS_FLOW_CMD_NEW, |
1027 | ufid_flags); | |
6740b721 | 1028 | BUG_ON(error < 0); |
0585f7a8 | 1029 | } |
6740b721 | 1030 | ovs_unlock(); |
d6569377 | 1031 | } else { |
0c9fd022 JR |
1032 | struct sw_flow_actions *old_acts; |
1033 | ||
d6569377 BP |
1034 | /* Bail out if we're not allowed to modify an existing flow. |
1035 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1036 | * because Generic Netlink treats the latter as a dump | |
1037 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1038 | * gets fixed. | |
1039 | */ | |
6740b721 JR |
1040 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1041 | | NLM_F_EXCL))) { | |
1042 | error = -EEXIST; | |
cd2a59e9 | 1043 | goto err_unlock_ovs; |
6740b721 | 1044 | } |
bc619e29 JS |
1045 | /* The flow identifier has to be the same for flow updates. |
1046 | * Look for any overlapping flow. | |
1047 | */ | |
1048 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1049 | if (ovs_identifier_is_key(&flow->id)) | |
1050 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1051 | &match); | |
1052 | else /* UFID matches but key is different */ | |
1053 | flow = NULL; | |
3440e4bc AW |
1054 | if (!flow) { |
1055 | error = -ENOENT; | |
1056 | goto err_unlock_ovs; | |
1057 | } | |
6740b721 | 1058 | } |
0c9fd022 JR |
1059 | /* Update actions. */ |
1060 | old_acts = ovsl_dereference(flow->sf_acts); | |
1061 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1062 | |
6740b721 | 1063 | if (unlikely(reply)) { |
2c622e5a | 1064 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1065 | ovs_header->dp_ifindex, |
1066 | reply, info->snd_portid, | |
1067 | info->snd_seq, 0, | |
bc619e29 JS |
1068 | OVS_FLOW_CMD_NEW, |
1069 | ufid_flags); | |
6740b721 JR |
1070 | BUG_ON(error < 0); |
1071 | } | |
1072 | ovs_unlock(); | |
0c9fd022 | 1073 | |
e23775f2 | 1074 | ovs_nla_free_flow_actions_rcu(old_acts); |
6740b721 | 1075 | ovs_flow_free(new_flow, false); |
0c9fd022 | 1076 | } |
6740b721 JR |
1077 | |
1078 | if (reply) | |
cb25142c | 1079 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1080 | return 0; |
1081 | ||
0c9fd022 JR |
1082 | err_unlock_ovs: |
1083 | ovs_unlock(); | |
6740b721 JR |
1084 | kfree_skb(reply); |
1085 | err_kfree_acts: | |
e23775f2 | 1086 | ovs_nla_free_flow_actions(acts); |
6740b721 JR |
1087 | err_kfree_flow: |
1088 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1089 | error: |
1090 | return error; | |
1091 | } | |
1092 | ||
cc561abf | 1093 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
a94ebc39 JS |
1094 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1095 | const struct nlattr *a, | |
cc561abf | 1096 | const struct sw_flow_key *key, |
9233cef7 JR |
1097 | const struct sw_flow_mask *mask, |
1098 | bool log) | |
cc561abf PS |
1099 | { |
1100 | struct sw_flow_actions *acts; | |
1101 | struct sw_flow_key masked_key; | |
1102 | int error; | |
1103 | ||
ad4adec2 | 1104 | ovs_flow_mask_key(&masked_key, key, true, mask); |
a94ebc39 | 1105 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
cc561abf | 1106 | if (error) { |
9233cef7 | 1107 | OVS_NLERR(log, |
7d16c847 | 1108 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1109 | return ERR_PTR(error); |
1110 | } | |
1111 | ||
1112 | return acts; | |
1113 | } | |
1114 | ||
0c9fd022 JR |
1115 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1116 | { | |
a94ebc39 | 1117 | struct net *net = sock_net(skb->sk); |
0c9fd022 JR |
1118 | struct nlattr **a = info->attrs; |
1119 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1120 | struct sw_flow_key key; |
0c9fd022 JR |
1121 | struct sw_flow *flow; |
1122 | struct sw_flow_mask mask; | |
1123 | struct sk_buff *reply = NULL; | |
1124 | struct datapath *dp; | |
6740b721 | 1125 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1126 | struct sw_flow_match match; |
bc619e29 JS |
1127 | struct sw_flow_id sfid; |
1128 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
b24baa1a | 1129 | int error = 0; |
9233cef7 | 1130 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1131 | bool ufid_present; |
0c9fd022 | 1132 | |
bc619e29 | 1133 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
b24baa1a PS |
1134 | if (a[OVS_FLOW_ATTR_KEY]) { |
1135 | ovs_match_init(&match, &key, &mask); | |
1136 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], | |
1137 | a[OVS_FLOW_ATTR_MASK], log); | |
1138 | } else if (!ufid_present) { | |
1139 | OVS_NLERR(log, | |
1140 | "Flow set message rejected, Key attribute missing."); | |
1141 | error = -EINVAL; | |
1142 | } | |
0c9fd022 JR |
1143 | if (error) |
1144 | goto error; | |
d6569377 | 1145 | |
0c9fd022 JR |
1146 | /* Validate actions. */ |
1147 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
b24baa1a PS |
1148 | if (!a[OVS_FLOW_ATTR_KEY]) { |
1149 | OVS_NLERR(log, | |
1150 | "Flow key attribute not present in set flow."); | |
1151 | error = -EINVAL; | |
1152 | goto error; | |
1153 | } | |
1154 | ||
a94ebc39 JS |
1155 | acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], &key, |
1156 | &mask, log); | |
cc561abf PS |
1157 | if (IS_ERR(acts)) { |
1158 | error = PTR_ERR(acts); | |
0c9fd022 | 1159 | goto error; |
6740b721 | 1160 | } |
6740b721 | 1161 | |
ff27161e | 1162 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1163 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1164 | ufid_flags); | |
6740b721 JR |
1165 | if (IS_ERR(reply)) { |
1166 | error = PTR_ERR(reply); | |
1167 | goto err_kfree_acts; | |
90b8c2f7 | 1168 | } |
0c9fd022 JR |
1169 | } |
1170 | ||
1171 | ovs_lock(); | |
a94ebc39 | 1172 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1173 | if (unlikely(!dp)) { |
1174 | error = -ENODEV; | |
0c9fd022 | 1175 | goto err_unlock_ovs; |
6740b721 | 1176 | } |
0c9fd022 | 1177 | /* Check that the flow exists. */ |
bc619e29 JS |
1178 | if (ufid_present) |
1179 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1180 | else | |
1181 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1182 | if (unlikely(!flow)) { |
1183 | error = -ENOENT; | |
0c9fd022 | 1184 | goto err_unlock_ovs; |
6740b721 | 1185 | } |
3440e4bc | 1186 | |
0c9fd022 | 1187 | /* Update actions, if present. */ |
6740b721 | 1188 | if (likely(acts)) { |
0c9fd022 JR |
1189 | old_acts = ovsl_dereference(flow->sf_acts); |
1190 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1191 | |
1192 | if (unlikely(reply)) { | |
2c622e5a | 1193 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1194 | ovs_header->dp_ifindex, |
1195 | reply, info->snd_portid, | |
1196 | info->snd_seq, 0, | |
bc619e29 JS |
1197 | OVS_FLOW_CMD_NEW, |
1198 | ufid_flags); | |
6740b721 JR |
1199 | BUG_ON(error < 0); |
1200 | } | |
1201 | } else { | |
1202 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1203 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
bc619e29 JS |
1204 | info, OVS_FLOW_CMD_NEW, false, |
1205 | ufid_flags); | |
1206 | ||
6740b721 JR |
1207 | if (unlikely(IS_ERR(reply))) { |
1208 | error = PTR_ERR(reply); | |
1209 | goto err_unlock_ovs; | |
1210 | } | |
9c52546b | 1211 | } |
0c9fd022 | 1212 | |
0c9fd022 JR |
1213 | /* Clear stats. */ |
1214 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1215 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1216 | ovs_unlock(); |
37a1300c | 1217 | |
6740b721 | 1218 | if (reply) |
cb25142c | 1219 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 | 1220 | if (old_acts) |
e23775f2 | 1221 | ovs_nla_free_flow_actions_rcu(old_acts); |
7d16c847 | 1222 | |
d6569377 | 1223 | return 0; |
704a1e09 | 1224 | |
cd2a59e9 PS |
1225 | err_unlock_ovs: |
1226 | ovs_unlock(); | |
6740b721 JR |
1227 | kfree_skb(reply); |
1228 | err_kfree_acts: | |
e23775f2 | 1229 | ovs_nla_free_flow_actions(acts); |
37a1300c | 1230 | error: |
9c52546b | 1231 | return error; |
704a1e09 BP |
1232 | } |
1233 | ||
df2c07f4 | 1234 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1235 | { |
37a1300c | 1236 | struct nlattr **a = info->attrs; |
df2c07f4 | 1237 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1238 | struct net *net = sock_net(skb->sk); |
37a1300c | 1239 | struct sw_flow_key key; |
37a1300c | 1240 | struct sk_buff *reply; |
704a1e09 | 1241 | struct sw_flow *flow; |
9c52546b | 1242 | struct datapath *dp; |
a1c564be | 1243 | struct sw_flow_match match; |
bc619e29 JS |
1244 | struct sw_flow_id ufid; |
1245 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1246 | int err = 0; | |
9233cef7 | 1247 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1248 | bool ufid_present; |
704a1e09 | 1249 | |
bc619e29 JS |
1250 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1251 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1252 | ovs_match_init(&match, &key, NULL); | |
038e34ab | 1253 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
bc619e29 JS |
1254 | log); |
1255 | } else if (!ufid_present) { | |
9233cef7 JR |
1256 | OVS_NLERR(log, |
1257 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1258 | err = -EINVAL; |
1b936472 | 1259 | } |
37a1300c BP |
1260 | if (err) |
1261 | return err; | |
704a1e09 | 1262 | |
cd2a59e9 | 1263 | ovs_lock(); |
2a4999f3 | 1264 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1265 | if (!dp) { |
1266 | err = -ENODEV; | |
1267 | goto unlock; | |
1268 | } | |
704a1e09 | 1269 | |
bc619e29 JS |
1270 | if (ufid_present) |
1271 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1272 | else | |
1273 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1274 | if (!flow) { |
cd2a59e9 PS |
1275 | err = -ENOENT; |
1276 | goto unlock; | |
1277 | } | |
d6569377 | 1278 | |
7d16c847 | 1279 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
bc619e29 | 1280 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
cd2a59e9 PS |
1281 | if (IS_ERR(reply)) { |
1282 | err = PTR_ERR(reply); | |
1283 | goto unlock; | |
1284 | } | |
36956a7d | 1285 | |
cd2a59e9 | 1286 | ovs_unlock(); |
37a1300c | 1287 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1288 | unlock: |
1289 | ovs_unlock(); | |
1290 | return err; | |
d6569377 | 1291 | } |
9c52546b | 1292 | |
df2c07f4 | 1293 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1294 | { |
37a1300c | 1295 | struct nlattr **a = info->attrs; |
df2c07f4 | 1296 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1297 | struct net *net = sock_net(skb->sk); |
37a1300c | 1298 | struct sw_flow_key key; |
37a1300c | 1299 | struct sk_buff *reply; |
bc619e29 | 1300 | struct sw_flow *flow = NULL; |
d6569377 | 1301 | struct datapath *dp; |
a1c564be | 1302 | struct sw_flow_match match; |
bc619e29 JS |
1303 | struct sw_flow_id ufid; |
1304 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1305 | int err; |
9233cef7 | 1306 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1307 | bool ufid_present; |
36956a7d | 1308 | |
bc619e29 JS |
1309 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1310 | if (a[OVS_FLOW_ATTR_KEY]) { | |
cde7f3ba | 1311 | ovs_match_init(&match, &key, NULL); |
038e34ab JS |
1312 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1313 | NULL, log); | |
cde7f3ba JR |
1314 | if (unlikely(err)) |
1315 | return err; | |
1316 | } | |
1317 | ||
cd2a59e9 | 1318 | ovs_lock(); |
2a4999f3 | 1319 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1320 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1321 | err = -ENODEV; |
1322 | goto unlock; | |
1323 | } | |
7d16c847 | 1324 | |
bc619e29 | 1325 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1326 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1327 | goto unlock; |
1328 | } | |
7d16c847 | 1329 | |
bc619e29 JS |
1330 | if (ufid_present) |
1331 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1332 | else | |
1333 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1334 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1335 | err = -ENOENT; |
1336 | goto unlock; | |
1337 | } | |
d6569377 | 1338 | |
994dc286 | 1339 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1340 | ovs_unlock(); |
37a1300c | 1341 | |
46051cf8 | 1342 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1343 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1344 | |
1345 | if (likely(reply)) { | |
1346 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1347 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1348 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1349 | reply, info->snd_portid, |
1350 | info->snd_seq, 0, | |
bc619e29 JS |
1351 | OVS_FLOW_CMD_DEL, |
1352 | ufid_flags); | |
cde7f3ba JR |
1353 | rcu_read_unlock(); |
1354 | BUG_ON(err < 0); | |
cb25142c | 1355 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1356 | } else { |
cb25142c PS |
1357 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1358 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1359 | ||
cde7f3ba | 1360 | } |
afad3556 | 1361 | } |
37a1300c | 1362 | |
a1c564be | 1363 | ovs_flow_free(flow, true); |
37a1300c | 1364 | return 0; |
cd2a59e9 PS |
1365 | unlock: |
1366 | ovs_unlock(); | |
1367 | return err; | |
37a1300c BP |
1368 | } |
1369 | ||
df2c07f4 | 1370 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1371 | { |
bc619e29 | 1372 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1373 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1374 | struct table_instance *ti; |
37a1300c | 1375 | struct datapath *dp; |
bc619e29 JS |
1376 | u32 ufid_flags; |
1377 | int err; | |
1378 | ||
1379 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
1380 | OVS_FLOW_ATTR_MAX, flow_policy); | |
1381 | if (err) | |
1382 | return err; | |
1383 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1384 | |
f44ccce1 | 1385 | rcu_read_lock(); |
01ac0970 | 1386 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1387 | if (!dp) { |
f44ccce1 | 1388 | rcu_read_unlock(); |
37a1300c | 1389 | return -ENODEV; |
cd2a59e9 | 1390 | } |
37a1300c | 1391 | |
994dc286 | 1392 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1393 | for (;;) { |
37a1300c BP |
1394 | struct sw_flow *flow; |
1395 | u32 bucket, obj; | |
1396 | ||
1397 | bucket = cb->args[0]; | |
1398 | obj = cb->args[1]; | |
994dc286 | 1399 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1400 | if (!flow) |
37a1300c BP |
1401 | break; |
1402 | ||
2c622e5a | 1403 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1404 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1405 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
bc619e29 | 1406 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
37a1300c BP |
1407 | break; |
1408 | ||
1409 | cb->args[0] = bucket; | |
1410 | cb->args[1] = obj; | |
1411 | } | |
f44ccce1 | 1412 | rcu_read_unlock(); |
37a1300c | 1413 | return skb->len; |
704a1e09 BP |
1414 | } |
1415 | ||
cb25142c PS |
1416 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1417 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1418 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1419 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1420 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1421 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1422 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1423 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1424 | }; |
1425 | ||
18fd3a52 | 1426 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1427 | { .cmd = OVS_FLOW_CMD_NEW, |
a6a8674d | 1428 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1429 | .policy = flow_policy, |
0c9fd022 | 1430 | .doit = ovs_flow_cmd_new |
37a1300c | 1431 | }, |
df2c07f4 | 1432 | { .cmd = OVS_FLOW_CMD_DEL, |
a6a8674d | 1433 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1434 | .policy = flow_policy, |
df2c07f4 | 1435 | .doit = ovs_flow_cmd_del |
37a1300c | 1436 | }, |
df2c07f4 | 1437 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1438 | .flags = 0, /* OK for unprivileged users. */ |
1439 | .policy = flow_policy, | |
df2c07f4 JP |
1440 | .doit = ovs_flow_cmd_get, |
1441 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1442 | }, |
df2c07f4 | 1443 | { .cmd = OVS_FLOW_CMD_SET, |
a6a8674d | 1444 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1445 | .policy = flow_policy, |
0c9fd022 | 1446 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1447 | }, |
1448 | }; | |
1449 | ||
cb25142c | 1450 | static struct genl_family dp_flow_genl_family = { |
aaff4b55 | 1451 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1452 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1453 | .name = OVS_FLOW_FAMILY, |
1454 | .version = OVS_FLOW_VERSION, | |
1455 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1456 | .netnsok = true, |
cb25142c PS |
1457 | .parallel_ops = true, |
1458 | .ops = dp_flow_genl_ops, | |
1459 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1460 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1461 | .n_mcgrps = 1, | |
aaff4b55 BP |
1462 | }; |
1463 | ||
0afa2373 TG |
1464 | static size_t ovs_dp_cmd_msg_size(void) |
1465 | { | |
1466 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1467 | ||
1468 | msgsize += nla_total_size(IFNAMSIZ); | |
91b37647 PS |
1469 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1470 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
300af20a | 1471 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1472 | |
1473 | return msgsize; | |
1474 | } | |
1475 | ||
d637497c | 1476 | /* Called with ovs_mutex. */ |
df2c07f4 | 1477 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1478 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1479 | { |
df2c07f4 | 1480 | struct ovs_header *ovs_header; |
e926dfe3 | 1481 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1482 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1483 | int err; |
1484 | ||
28aea917 | 1485 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1486 | flags, cmd); |
df2c07f4 | 1487 | if (!ovs_header) |
aaff4b55 | 1488 | goto error; |
064af421 | 1489 | |
b063d9f0 | 1490 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1491 | |
850b6b3b | 1492 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1493 | if (err) |
d6569377 | 1494 | goto nla_put_failure; |
064af421 | 1495 | |
4fa72a95 | 1496 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
91b37647 PS |
1497 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1498 | &dp_stats, OVS_DP_ATTR_PAD)) | |
4fa72a95 AZ |
1499 | goto nla_put_failure; |
1500 | ||
91b37647 PS |
1501 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1502 | sizeof(struct ovs_dp_megaflow_stats), | |
1503 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
c3cc8c03 | 1504 | goto nla_put_failure; |
d6569377 | 1505 | |
c58cc9a4 TG |
1506 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1507 | goto nla_put_failure; | |
1508 | ||
23b48dc1 TG |
1509 | genlmsg_end(skb, ovs_header); |
1510 | return 0; | |
d6569377 BP |
1511 | |
1512 | nla_put_failure: | |
df2c07f4 | 1513 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1514 | error: |
1515 | return -EMSGSIZE; | |
d6569377 BP |
1516 | } |
1517 | ||
40c08cda | 1518 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
d6569377 | 1519 | { |
40c08cda | 1520 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
aaff4b55 | 1521 | } |
9dca7bd5 | 1522 | |
aa917006 | 1523 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1524 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1525 | const struct ovs_header *ovs_header, |
6455100f | 1526 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1527 | { |
254f2dc8 BP |
1528 | struct datapath *dp; |
1529 | ||
df2c07f4 | 1530 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1531 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1532 | else { |
d6569377 | 1533 | struct vport *vport; |
d6569377 | 1534 | |
2a4999f3 | 1535 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1536 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1537 | } |
254f2dc8 | 1538 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1539 | } |
1540 | ||
94358dcf TG |
1541 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1542 | { | |
1543 | struct datapath *dp; | |
1544 | ||
1545 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1546 | if (IS_ERR(dp)) |
94358dcf TG |
1547 | return; |
1548 | ||
1549 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1550 | dp->user_features = 0; | |
1551 | } | |
1552 | ||
f1f60b85 | 1553 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1554 | { |
1555 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1556 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1557 | } | |
1558 | ||
df2c07f4 | 1559 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1560 | { |
aaff4b55 | 1561 | struct nlattr **a = info->attrs; |
d6569377 | 1562 | struct vport_parms parms; |
aaff4b55 | 1563 | struct sk_buff *reply; |
d6569377 BP |
1564 | struct datapath *dp; |
1565 | struct vport *vport; | |
2a4999f3 | 1566 | struct ovs_net *ovs_net; |
95b1d73a | 1567 | int err, i; |
d6569377 | 1568 | |
d6569377 | 1569 | err = -EINVAL; |
ea36840f | 1570 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1571 | goto err; |
1572 | ||
40c08cda | 1573 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1574 | if (!reply) |
1575 | return -ENOMEM; | |
d6569377 | 1576 | |
d6569377 BP |
1577 | err = -ENOMEM; |
1578 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1579 | if (dp == NULL) | |
d81eef1b | 1580 | goto err_free_reply; |
2a4999f3 | 1581 | |
c0cddcec | 1582 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
0ceaa66c | 1583 | |
d6569377 | 1584 | /* Allocate table. */ |
994dc286 PS |
1585 | err = ovs_flow_tbl_init(&dp->table); |
1586 | if (err) | |
d6569377 BP |
1587 | goto err_free_dp; |
1588 | ||
08fb1bbd | 1589 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1590 | if (!dp->stats_percpu) { |
1591 | err = -ENOMEM; | |
1592 | goto err_destroy_table; | |
1593 | } | |
1594 | ||
95b1d73a PS |
1595 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1596 | GFP_KERNEL); | |
1597 | if (!dp->ports) { | |
1598 | err = -ENOMEM; | |
1599 | goto err_destroy_percpu; | |
1600 | } | |
1601 | ||
1602 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1603 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1604 | ||
d6569377 | 1605 | /* Set up our datapath device. */ |
df2c07f4 JP |
1606 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1607 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1608 | parms.options = NULL; |
1609 | parms.dp = dp; | |
df2c07f4 | 1610 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1611 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1612 | |
c58cc9a4 TG |
1613 | ovs_dp_change(dp, a); |
1614 | ||
d81eef1b JR |
1615 | /* So far only local changes have been made, now need the lock. */ |
1616 | ovs_lock(); | |
1617 | ||
d6569377 BP |
1618 | vport = new_vport(&parms); |
1619 | if (IS_ERR(vport)) { | |
1620 | err = PTR_ERR(vport); | |
1621 | if (err == -EBUSY) | |
1622 | err = -EEXIST; | |
1623 | ||
94358dcf TG |
1624 | if (err == -EEXIST) { |
1625 | /* An outdated user space instance that does not understand | |
1626 | * the concept of user_features has attempted to create a new | |
1627 | * datapath and is likely to reuse it. Drop all user features. | |
1628 | */ | |
1629 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1630 | ovs_dp_reset_user_features(skb, info); | |
1631 | } | |
1632 | ||
95b1d73a | 1633 | goto err_destroy_ports_array; |
d6569377 | 1634 | } |
d6569377 | 1635 | |
d81eef1b JR |
1636 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1637 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1638 | BUG_ON(err < 0); | |
aaff4b55 | 1639 | |
2a4999f3 | 1640 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1641 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
a0fb56c1 | 1642 | |
cd2a59e9 | 1643 | ovs_unlock(); |
d6569377 | 1644 | |
cb25142c | 1645 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1646 | return 0; |
1647 | ||
95b1d73a | 1648 | err_destroy_ports_array: |
d81eef1b | 1649 | ovs_unlock(); |
95b1d73a | 1650 | kfree(dp->ports); |
99769a40 JG |
1651 | err_destroy_percpu: |
1652 | free_percpu(dp->stats_percpu); | |
d6569377 | 1653 | err_destroy_table: |
e379e4d1 | 1654 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1655 | err_free_dp: |
d6569377 | 1656 | kfree(dp); |
d81eef1b JR |
1657 | err_free_reply: |
1658 | kfree_skb(reply); | |
d6569377 | 1659 | err: |
064af421 BP |
1660 | return err; |
1661 | } | |
1662 | ||
cd2a59e9 | 1663 | /* Called with ovs_mutex. */ |
2a4999f3 | 1664 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1665 | { |
95b1d73a | 1666 | int i; |
44e05eca | 1667 | |
95b1d73a PS |
1668 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1669 | struct vport *vport; | |
f8dfbcb7 | 1670 | struct hlist_node *n; |
95b1d73a | 1671 | |
f8dfbcb7 | 1672 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1673 | if (vport->port_no != OVSP_LOCAL) |
1674 | ovs_dp_detach_port(vport); | |
1675 | } | |
ed099e92 | 1676 | |
fb93e9aa | 1677 | list_del_rcu(&dp->list_node); |
ed099e92 | 1678 | |
cd2a59e9 | 1679 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1680 | * all ports in datapath are destroyed first before freeing datapath. |
1681 | */ | |
cd2a59e9 | 1682 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1683 | |
d103f479 | 1684 | /* RCU destroy the flow table */ |
ed099e92 | 1685 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1686 | } |
1687 | ||
1688 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1689 | { | |
1690 | struct sk_buff *reply; | |
1691 | struct datapath *dp; | |
1692 | int err; | |
1693 | ||
40c08cda | 1694 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1695 | if (!reply) |
1696 | return -ENOMEM; | |
1697 | ||
cd2a59e9 | 1698 | ovs_lock(); |
2a4999f3 PS |
1699 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1700 | err = PTR_ERR(dp); | |
1701 | if (IS_ERR(dp)) | |
d81eef1b | 1702 | goto err_unlock_free; |
2a4999f3 | 1703 | |
d81eef1b JR |
1704 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1705 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1706 | BUG_ON(err < 0); | |
2a4999f3 PS |
1707 | |
1708 | __dp_destroy(dp); | |
d81eef1b | 1709 | ovs_unlock(); |
7d16c847 | 1710 | |
cb25142c | 1711 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1712 | return 0; |
d81eef1b JR |
1713 | |
1714 | err_unlock_free: | |
cd2a59e9 | 1715 | ovs_unlock(); |
d81eef1b | 1716 | kfree_skb(reply); |
cd2a59e9 | 1717 | return err; |
44e05eca BP |
1718 | } |
1719 | ||
df2c07f4 | 1720 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1721 | { |
aaff4b55 | 1722 | struct sk_buff *reply; |
d6569377 | 1723 | struct datapath *dp; |
d6569377 | 1724 | int err; |
064af421 | 1725 | |
40c08cda | 1726 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1727 | if (!reply) |
1728 | return -ENOMEM; | |
1729 | ||
cd2a59e9 | 1730 | ovs_lock(); |
2a4999f3 | 1731 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1732 | err = PTR_ERR(dp); |
d6569377 | 1733 | if (IS_ERR(dp)) |
d81eef1b | 1734 | goto err_unlock_free; |
38c6ecbc | 1735 | |
c58cc9a4 TG |
1736 | ovs_dp_change(dp, info->attrs); |
1737 | ||
d81eef1b JR |
1738 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1739 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1740 | BUG_ON(err < 0); | |
a0fb56c1 | 1741 | |
cd2a59e9 | 1742 | ovs_unlock(); |
7d16c847 | 1743 | |
cb25142c | 1744 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1745 | return 0; |
d81eef1b JR |
1746 | |
1747 | err_unlock_free: | |
cd2a59e9 | 1748 | ovs_unlock(); |
d81eef1b | 1749 | kfree_skb(reply); |
cd2a59e9 | 1750 | return err; |
064af421 BP |
1751 | } |
1752 | ||
df2c07f4 | 1753 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1754 | { |
aaff4b55 | 1755 | struct sk_buff *reply; |
d6569377 | 1756 | struct datapath *dp; |
d6569377 | 1757 | int err; |
1dcf111b | 1758 | |
40c08cda | 1759 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1760 | if (!reply) |
1761 | return -ENOMEM; | |
1762 | ||
d637497c | 1763 | ovs_lock(); |
2a4999f3 | 1764 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1765 | if (IS_ERR(dp)) { |
1766 | err = PTR_ERR(dp); | |
d81eef1b | 1767 | goto err_unlock_free; |
cd2a59e9 | 1768 | } |
d81eef1b JR |
1769 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1770 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1771 | BUG_ON(err < 0); | |
d637497c | 1772 | ovs_unlock(); |
aaff4b55 BP |
1773 | |
1774 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1775 | |
d81eef1b | 1776 | err_unlock_free: |
d637497c | 1777 | ovs_unlock(); |
d81eef1b | 1778 | kfree_skb(reply); |
cd2a59e9 | 1779 | return err; |
1dcf111b JP |
1780 | } |
1781 | ||
df2c07f4 | 1782 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1783 | { |
2a4999f3 | 1784 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1785 | struct datapath *dp; |
1786 | int skip = cb->args[0]; | |
1787 | int i = 0; | |
a7786963 | 1788 | |
d637497c PS |
1789 | ovs_lock(); |
1790 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1791 | if (i >= skip && |
28aea917 | 1792 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1793 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1794 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1795 | break; |
254f2dc8 | 1796 | i++; |
a7786963 | 1797 | } |
d637497c | 1798 | ovs_unlock(); |
aaff4b55 | 1799 | |
254f2dc8 BP |
1800 | cb->args[0] = i; |
1801 | ||
aaff4b55 | 1802 | return skb->len; |
c19e6535 BP |
1803 | } |
1804 | ||
cb25142c PS |
1805 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1806 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1807 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1808 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1809 | }; | |
1810 | ||
18fd3a52 | 1811 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1812 | { .cmd = OVS_DP_CMD_NEW, |
a6a8674d | 1813 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1814 | .policy = datapath_policy, |
df2c07f4 | 1815 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1816 | }, |
df2c07f4 | 1817 | { .cmd = OVS_DP_CMD_DEL, |
a6a8674d | 1818 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1819 | .policy = datapath_policy, |
df2c07f4 | 1820 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1821 | }, |
df2c07f4 | 1822 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1823 | .flags = 0, /* OK for unprivileged users. */ |
1824 | .policy = datapath_policy, | |
df2c07f4 JP |
1825 | .doit = ovs_dp_cmd_get, |
1826 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1827 | }, |
df2c07f4 | 1828 | { .cmd = OVS_DP_CMD_SET, |
a6a8674d | 1829 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1830 | .policy = datapath_policy, |
df2c07f4 | 1831 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1832 | }, |
1833 | }; | |
1834 | ||
cb25142c | 1835 | static struct genl_family dp_datapath_genl_family = { |
f0fef760 | 1836 | .id = GENL_ID_GENERATE, |
df2c07f4 | 1837 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1838 | .name = OVS_DATAPATH_FAMILY, |
1839 | .version = OVS_DATAPATH_VERSION, | |
1840 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1841 | .netnsok = true, |
cb25142c PS |
1842 | .parallel_ops = true, |
1843 | .ops = dp_datapath_genl_ops, | |
1844 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1845 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1846 | .n_mcgrps = 1, | |
f0fef760 BP |
1847 | }; |
1848 | ||
cd2a59e9 | 1849 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1850 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
28aea917 | 1851 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1852 | { |
df2c07f4 | 1853 | struct ovs_header *ovs_header; |
e926dfe3 | 1854 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1855 | int err; |
1856 | ||
28aea917 | 1857 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1858 | flags, cmd); |
df2c07f4 | 1859 | if (!ovs_header) |
f0fef760 | 1860 | return -EMSGSIZE; |
c19e6535 | 1861 | |
99769a40 | 1862 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1863 | |
c3cc8c03 DM |
1864 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1865 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
e23775f2 PS |
1866 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
1867 | ovs_vport_name(vport))) | |
c3cc8c03 | 1868 | goto nla_put_failure; |
c19e6535 | 1869 | |
850b6b3b | 1870 | ovs_vport_get_stats(vport, &vport_stats); |
91b37647 PS |
1871 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1872 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1873 | OVS_VPORT_ATTR_PAD)) | |
c3cc8c03 | 1874 | goto nla_put_failure; |
c19e6535 | 1875 | |
beb1c69a AW |
1876 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1877 | goto nla_put_failure; | |
1878 | ||
850b6b3b | 1879 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1880 | if (err == -EMSGSIZE) |
1881 | goto error; | |
c19e6535 | 1882 | |
23b48dc1 TG |
1883 | genlmsg_end(skb, ovs_header); |
1884 | return 0; | |
c19e6535 BP |
1885 | |
1886 | nla_put_failure: | |
1887 | err = -EMSGSIZE; | |
f0fef760 | 1888 | error: |
df2c07f4 | 1889 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1890 | return err; |
064af421 BP |
1891 | } |
1892 | ||
d81eef1b JR |
1893 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1894 | { | |
1895 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1896 | } | |
1897 | ||
1898 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
28aea917 | 1899 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 portid, |
f14d8083 | 1900 | u32 seq, u8 cmd) |
064af421 | 1901 | { |
c19e6535 | 1902 | struct sk_buff *skb; |
f0fef760 | 1903 | int retval; |
c19e6535 | 1904 | |
f0fef760 | 1905 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1906 | if (!skb) |
1907 | return ERR_PTR(-ENOMEM); | |
1908 | ||
28aea917 | 1909 | retval = ovs_vport_cmd_fill_info(vport, skb, portid, seq, 0, cmd); |
c25ea534 JG |
1910 | BUG_ON(retval < 0); |
1911 | ||
c19e6535 | 1912 | return skb; |
f0fef760 | 1913 | } |
c19e6535 | 1914 | |
cd2a59e9 | 1915 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1916 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1917 | const struct ovs_header *ovs_header, |
df2c07f4 | 1918 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1919 | { |
1920 | struct datapath *dp; | |
1921 | struct vport *vport; | |
1922 | ||
df2c07f4 | 1923 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1924 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1925 | if (!vport) |
c19e6535 | 1926 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1927 | if (ovs_header->dp_ifindex && |
1928 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1929 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1930 | return vport; |
df2c07f4 JP |
1931 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1932 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1933 | |
1934 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1935 | return ERR_PTR(-EFBIG); |
c19e6535 | 1936 | |
2a4999f3 | 1937 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1938 | if (!dp) |
1939 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1940 | |
cd2a59e9 | 1941 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1942 | if (!vport) |
17535c57 | 1943 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1944 | return vport; |
1945 | } else | |
1946 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1947 | } |
1948 | ||
8ce37339 PS |
1949 | /* Called with ovs_mutex */ |
1950 | static void update_headroom(struct datapath *dp) | |
1951 | { | |
1952 | unsigned dev_headroom, max_headroom = 0; | |
1953 | struct net_device *dev; | |
1954 | struct vport *vport; | |
1955 | int i; | |
1956 | ||
1957 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1958 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1959 | dev = vport->dev; | |
1960 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1961 | if (dev_headroom > max_headroom) | |
1962 | max_headroom = dev_headroom; | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | dp->max_headroom = max_headroom; | |
1967 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1968 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1969 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1970 | } | |
1971 | ||
df2c07f4 | 1972 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1973 | { |
f0fef760 | 1974 | struct nlattr **a = info->attrs; |
df2c07f4 | 1975 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1976 | struct vport_parms parms; |
ed099e92 | 1977 | struct sk_buff *reply; |
c19e6535 | 1978 | struct vport *vport; |
c19e6535 | 1979 | struct datapath *dp; |
b0ec0f27 | 1980 | u32 port_no; |
c19e6535 | 1981 | int err; |
b0ec0f27 | 1982 | |
ea36840f BP |
1983 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1984 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b JR |
1985 | return -EINVAL; |
1986 | ||
1987 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1988 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1989 | if (port_no >= DP_MAX_PORTS) | |
1990 | return -EFBIG; | |
1991 | ||
1992 | reply = ovs_vport_cmd_alloc_info(); | |
1993 | if (!reply) | |
1994 | return -ENOMEM; | |
f0fef760 | 1995 | |
cd2a59e9 | 1996 | ovs_lock(); |
5a38795f | 1997 | restart: |
2a4999f3 | 1998 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
1999 | err = -ENODEV; |
2000 | if (!dp) | |
d81eef1b | 2001 | goto exit_unlock_free; |
c19e6535 | 2002 | |
d81eef1b | 2003 | if (port_no) { |
cd2a59e9 | 2004 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2005 | err = -EBUSY; |
2006 | if (vport) | |
d81eef1b | 2007 | goto exit_unlock_free; |
c19e6535 BP |
2008 | } else { |
2009 | for (port_no = 1; ; port_no++) { | |
2010 | if (port_no >= DP_MAX_PORTS) { | |
2011 | err = -EFBIG; | |
d81eef1b | 2012 | goto exit_unlock_free; |
c19e6535 | 2013 | } |
cd2a59e9 | 2014 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2015 | if (!vport) |
2016 | break; | |
51d4d598 | 2017 | } |
064af421 | 2018 | } |
b0ec0f27 | 2019 | |
df2c07f4 JP |
2020 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2021 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2022 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2023 | parms.dp = dp; |
2024 | parms.port_no = port_no; | |
beb1c69a | 2025 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
2026 | |
2027 | vport = new_vport(&parms); | |
2028 | err = PTR_ERR(vport); | |
5a38795f TG |
2029 | if (IS_ERR(vport)) { |
2030 | if (err == -EAGAIN) | |
2031 | goto restart; | |
d81eef1b | 2032 | goto exit_unlock_free; |
5a38795f | 2033 | } |
c19e6535 | 2034 | |
d81eef1b JR |
2035 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2036 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2037 | BUG_ON(err < 0); | |
8ce37339 PS |
2038 | |
2039 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2040 | update_headroom(dp); | |
2041 | else | |
2042 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2043 | ||
d81eef1b | 2044 | ovs_unlock(); |
e297c6b7 | 2045 | |
cb25142c | 2046 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2047 | return 0; |
c19e6535 | 2048 | |
d81eef1b | 2049 | exit_unlock_free: |
cd2a59e9 | 2050 | ovs_unlock(); |
d81eef1b | 2051 | kfree_skb(reply); |
c19e6535 | 2052 | return err; |
44e05eca BP |
2053 | } |
2054 | ||
df2c07f4 | 2055 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2056 | { |
f0fef760 BP |
2057 | struct nlattr **a = info->attrs; |
2058 | struct sk_buff *reply; | |
c19e6535 | 2059 | struct vport *vport; |
c19e6535 | 2060 | int err; |
44e05eca | 2061 | |
d81eef1b JR |
2062 | reply = ovs_vport_cmd_alloc_info(); |
2063 | if (!reply) | |
2064 | return -ENOMEM; | |
2065 | ||
cd2a59e9 | 2066 | ovs_lock(); |
2a4999f3 | 2067 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2068 | err = PTR_ERR(vport); |
2069 | if (IS_ERR(vport)) | |
d81eef1b | 2070 | goto exit_unlock_free; |
44e05eca | 2071 | |
6455100f | 2072 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2073 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2074 | err = -EINVAL; |
d81eef1b | 2075 | goto exit_unlock_free; |
c25ea534 JG |
2076 | } |
2077 | ||
17ec1d04 | 2078 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2079 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 2080 | if (err) |
d81eef1b | 2081 | goto exit_unlock_free; |
17ec1d04 | 2082 | } |
1fc7083d | 2083 | |
beb1c69a | 2084 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
2085 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
2086 | ||
2087 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
2088 | if (err) |
2089 | goto exit_unlock_free; | |
2090 | } | |
c19e6535 | 2091 | |
c25ea534 JG |
2092 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2093 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2094 | BUG_ON(err < 0); | |
cd2a59e9 | 2095 | ovs_unlock(); |
d81eef1b | 2096 | |
cb25142c | 2097 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2098 | return 0; |
2099 | ||
d81eef1b | 2100 | exit_unlock_free: |
cd2a59e9 | 2101 | ovs_unlock(); |
d81eef1b | 2102 | kfree_skb(reply); |
c19e6535 | 2103 | return err; |
064af421 BP |
2104 | } |
2105 | ||
df2c07f4 | 2106 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2107 | { |
8ce37339 | 2108 | bool must_update_headroom = false; |
f0fef760 BP |
2109 | struct nlattr **a = info->attrs; |
2110 | struct sk_buff *reply; | |
8ce37339 | 2111 | struct datapath *dp; |
c19e6535 | 2112 | struct vport *vport; |
c19e6535 BP |
2113 | int err; |
2114 | ||
d81eef1b JR |
2115 | reply = ovs_vport_cmd_alloc_info(); |
2116 | if (!reply) | |
2117 | return -ENOMEM; | |
2118 | ||
cd2a59e9 | 2119 | ovs_lock(); |
2a4999f3 | 2120 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2121 | err = PTR_ERR(vport); |
f0fef760 | 2122 | if (IS_ERR(vport)) |
d81eef1b | 2123 | goto exit_unlock_free; |
c19e6535 | 2124 | |
df2c07f4 | 2125 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2126 | err = -EINVAL; |
d81eef1b | 2127 | goto exit_unlock_free; |
f0fef760 BP |
2128 | } |
2129 | ||
d81eef1b JR |
2130 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, |
2131 | info->snd_seq, 0, OVS_VPORT_CMD_DEL); | |
2132 | BUG_ON(err < 0); | |
8ce37339 PS |
2133 | |
2134 | /* the vport deletion may trigger dp headroom update */ | |
2135 | dp = vport->dp; | |
2136 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2137 | must_update_headroom = true; | |
2138 | netdev_reset_rx_headroom(vport->dev); | |
850b6b3b | 2139 | ovs_dp_detach_port(vport); |
8ce37339 PS |
2140 | |
2141 | if (must_update_headroom) | |
2142 | update_headroom(dp); | |
2143 | ||
d81eef1b | 2144 | ovs_unlock(); |
f0fef760 | 2145 | |
cb25142c | 2146 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2147 | return 0; |
f0fef760 | 2148 | |
d81eef1b | 2149 | exit_unlock_free: |
cd2a59e9 | 2150 | ovs_unlock(); |
d81eef1b | 2151 | kfree_skb(reply); |
c19e6535 | 2152 | return err; |
7c40efc9 BP |
2153 | } |
2154 | ||
df2c07f4 | 2155 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2156 | { |
f0fef760 | 2157 | struct nlattr **a = info->attrs; |
df2c07f4 | 2158 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2159 | struct sk_buff *reply; |
c19e6535 | 2160 | struct vport *vport; |
c19e6535 BP |
2161 | int err; |
2162 | ||
d81eef1b JR |
2163 | reply = ovs_vport_cmd_alloc_info(); |
2164 | if (!reply) | |
2165 | return -ENOMEM; | |
2166 | ||
ed099e92 | 2167 | rcu_read_lock(); |
2a4999f3 | 2168 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2169 | err = PTR_ERR(vport); |
2170 | if (IS_ERR(vport)) | |
d81eef1b JR |
2171 | goto exit_unlock_free; |
2172 | err = ovs_vport_cmd_fill_info(vport, reply, info->snd_portid, | |
2173 | info->snd_seq, 0, OVS_VPORT_CMD_NEW); | |
2174 | BUG_ON(err < 0); | |
df2fa9b5 JG |
2175 | rcu_read_unlock(); |
2176 | ||
2177 | return genlmsg_reply(reply, info); | |
ed099e92 | 2178 | |
d81eef1b | 2179 | exit_unlock_free: |
ed099e92 | 2180 | rcu_read_unlock(); |
d81eef1b | 2181 | kfree_skb(reply); |
c19e6535 BP |
2182 | return err; |
2183 | } | |
2184 | ||
df2c07f4 | 2185 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2186 | { |
df2c07f4 | 2187 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2188 | struct datapath *dp; |
95b1d73a PS |
2189 | int bucket = cb->args[0], skip = cb->args[1]; |
2190 | int i, j = 0; | |
c19e6535 | 2191 | |
03fc2881 | 2192 | rcu_read_lock(); |
01ac0970 | 2193 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2194 | if (!dp) { |
2195 | rcu_read_unlock(); | |
f0fef760 | 2196 | return -ENODEV; |
03fc2881 | 2197 | } |
95b1d73a | 2198 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2199 | struct vport *vport; |
95b1d73a PS |
2200 | |
2201 | j = 0; | |
f8dfbcb7 | 2202 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2203 | if (j >= skip && |
2204 | ovs_vport_cmd_fill_info(vport, skb, | |
28aea917 | 2205 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2206 | cb->nlh->nlmsg_seq, |
2207 | NLM_F_MULTI, | |
2208 | OVS_VPORT_CMD_NEW) < 0) | |
2209 | goto out; | |
2210 | ||
2211 | j++; | |
2212 | } | |
2213 | skip = 0; | |
c19e6535 | 2214 | } |
95b1d73a | 2215 | out: |
ed099e92 | 2216 | rcu_read_unlock(); |
c19e6535 | 2217 | |
95b1d73a PS |
2218 | cb->args[0] = i; |
2219 | cb->args[1] = j; | |
f0fef760 | 2220 | |
95b1d73a | 2221 | return skb->len; |
7c40efc9 BP |
2222 | } |
2223 | ||
cb25142c PS |
2224 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2225 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2226 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2227 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2228 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2229 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2230 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
2231 | }; | |
2232 | ||
18fd3a52 | 2233 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2234 | { .cmd = OVS_VPORT_CMD_NEW, |
a6a8674d | 2235 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2236 | .policy = vport_policy, |
df2c07f4 | 2237 | .doit = ovs_vport_cmd_new |
f0fef760 | 2238 | }, |
df2c07f4 | 2239 | { .cmd = OVS_VPORT_CMD_DEL, |
a6a8674d | 2240 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2241 | .policy = vport_policy, |
df2c07f4 | 2242 | .doit = ovs_vport_cmd_del |
f0fef760 | 2243 | }, |
df2c07f4 | 2244 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2245 | .flags = 0, /* OK for unprivileged users. */ |
2246 | .policy = vport_policy, | |
df2c07f4 JP |
2247 | .doit = ovs_vport_cmd_get, |
2248 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2249 | }, |
df2c07f4 | 2250 | { .cmd = OVS_VPORT_CMD_SET, |
a6a8674d | 2251 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2252 | .policy = vport_policy, |
df2c07f4 | 2253 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2254 | }, |
2255 | }; | |
2256 | ||
cb25142c PS |
2257 | struct genl_family dp_vport_genl_family = { |
2258 | .id = GENL_ID_GENERATE, | |
2259 | .hdrsize = sizeof(struct ovs_header), | |
2260 | .name = OVS_VPORT_FAMILY, | |
2261 | .version = OVS_VPORT_VERSION, | |
2262 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2263 | .netnsok = true, | |
2264 | .parallel_ops = true, | |
2265 | .ops = dp_vport_genl_ops, | |
2266 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2267 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2268 | .n_mcgrps = 1, | |
982b8810 | 2269 | }; |
ed099e92 | 2270 | |
18fd3a52 | 2271 | static struct genl_family *dp_genl_families[] = { |
cb25142c PS |
2272 | &dp_datapath_genl_family, |
2273 | &dp_vport_genl_family, | |
2274 | &dp_flow_genl_family, | |
2275 | &dp_packet_genl_family, | |
982b8810 | 2276 | }; |
ed099e92 | 2277 | |
982b8810 BP |
2278 | static void dp_unregister_genl(int n_families) |
2279 | { | |
2280 | int i; | |
ed099e92 | 2281 | |
b867ca75 | 2282 | for (i = 0; i < n_families; i++) |
cb25142c | 2283 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2284 | } |
2285 | ||
982b8810 | 2286 | static int dp_register_genl(void) |
064af421 | 2287 | { |
982b8810 BP |
2288 | int err; |
2289 | int i; | |
064af421 | 2290 | |
982b8810 | 2291 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2292 | |
cb25142c | 2293 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2294 | if (err) |
2295 | goto error; | |
982b8810 | 2296 | } |
9cc8b4e4 | 2297 | |
982b8810 | 2298 | return 0; |
064af421 BP |
2299 | |
2300 | error: | |
cb25142c | 2301 | dp_unregister_genl(i); |
982b8810 | 2302 | return err; |
064af421 BP |
2303 | } |
2304 | ||
2a4999f3 PS |
2305 | static int __net_init ovs_init_net(struct net *net) |
2306 | { | |
2307 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2308 | ||
2309 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2310 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
038e34ab | 2311 | ovs_ct_init(net); |
2a4999f3 PS |
2312 | return 0; |
2313 | } | |
2314 | ||
cabd5516 PS |
2315 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2316 | struct list_head *head) | |
2a4999f3 PS |
2317 | { |
2318 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2319 | struct datapath *dp; |
2320 | ||
2321 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2322 | int i; | |
2323 | ||
2324 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2325 | struct vport *vport; | |
2326 | ||
2327 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
cabd5516 PS |
2328 | |
2329 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2330 | continue; | |
2331 | ||
e23775f2 | 2332 | if (dev_net(vport->dev) == dnet) |
cabd5516 PS |
2333 | list_add(&vport->detach_list, head); |
2334 | } | |
2335 | } | |
2336 | } | |
2337 | } | |
2338 | ||
2339 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2340 | { | |
2341 | struct datapath *dp, *dp_next; | |
2342 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2343 | struct vport *vport, *vport_next; | |
2344 | struct net *net; | |
2345 | LIST_HEAD(head); | |
2a4999f3 | 2346 | |
038e34ab | 2347 | ovs_ct_exit(dnet); |
cd2a59e9 PS |
2348 | ovs_lock(); |
2349 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2350 | __dp_destroy(dp); | |
cabd5516 PS |
2351 | |
2352 | rtnl_lock(); | |
2353 | for_each_net(net) | |
2354 | list_vports_from_net(net, dnet, &head); | |
2355 | rtnl_unlock(); | |
2356 | ||
2357 | /* Detach all vports from given namespace. */ | |
2358 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2359 | list_del(&vport->detach_list); | |
2360 | ovs_dp_detach_port(vport); | |
2361 | } | |
2362 | ||
cd2a59e9 PS |
2363 | ovs_unlock(); |
2364 | ||
2365 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2366 | } |
2367 | ||
2368 | static struct pernet_operations ovs_net_ops = { | |
2369 | .init = ovs_init_net, | |
2370 | .exit = ovs_exit_net, | |
2371 | .id = &ovs_net_id, | |
2372 | .size = sizeof(struct ovs_net), | |
2373 | }; | |
2374 | ||
22d24ebf BP |
2375 | static int __init dp_init(void) |
2376 | { | |
2377 | int err; | |
2378 | ||
f3d85db3 | 2379 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2380 | |
26bfaeaa | 2381 | pr_info("Open vSwitch switching datapath %s\n", VERSION); |
064af421 | 2382 | |
595e069a | 2383 | err = compat_init(); |
3544358a | 2384 | if (err) |
533e96e7 | 2385 | goto error; |
3544358a | 2386 | |
595e069a JS |
2387 | err = action_fifos_init(); |
2388 | if (err) | |
2389 | goto error_compat_exit; | |
2390 | ||
5282e284 | 2391 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2392 | if (err) |
2393 | goto error_action_fifos_exit; | |
2394 | ||
5282e284 TG |
2395 | err = ovs_flow_init(); |
2396 | if (err) | |
2397 | goto error_unreg_rtnl_link; | |
2398 | ||
850b6b3b | 2399 | err = ovs_vport_init(); |
064af421 BP |
2400 | if (err) |
2401 | goto error_flow_exit; | |
2402 | ||
2a4999f3 | 2403 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2404 | if (err) |
2405 | goto error_vport_exit; | |
2406 | ||
2a4999f3 PS |
2407 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2408 | if (err) | |
2409 | goto error_netns_exit; | |
2410 | ||
5a38795f TG |
2411 | err = ovs_netdev_init(); |
2412 | if (err) | |
2413 | goto error_unreg_notifier; | |
2414 | ||
982b8810 BP |
2415 | err = dp_register_genl(); |
2416 | if (err < 0) | |
5a38795f | 2417 | goto error_unreg_netdev; |
982b8810 | 2418 | |
064af421 BP |
2419 | return 0; |
2420 | ||
5a38795f TG |
2421 | error_unreg_netdev: |
2422 | ovs_netdev_exit(); | |
064af421 | 2423 | error_unreg_notifier: |
850b6b3b | 2424 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2425 | error_netns_exit: |
2426 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2427 | error_vport_exit: |
850b6b3b | 2428 | ovs_vport_exit(); |
064af421 | 2429 | error_flow_exit: |
850b6b3b | 2430 | ovs_flow_exit(); |
5282e284 TG |
2431 | error_unreg_rtnl_link: |
2432 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2433 | error_action_fifos_exit: |
2434 | action_fifos_exit(); | |
595e069a JS |
2435 | error_compat_exit: |
2436 | compat_exit(); | |
064af421 BP |
2437 | error: |
2438 | return err; | |
2439 | } | |
2440 | ||
2441 | static void dp_cleanup(void) | |
2442 | { | |
982b8810 | 2443 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2444 | ovs_netdev_exit(); |
850b6b3b | 2445 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
2a4999f3 PS |
2446 | unregister_pernet_device(&ovs_net_ops); |
2447 | rcu_barrier(); | |
850b6b3b JG |
2448 | ovs_vport_exit(); |
2449 | ovs_flow_exit(); | |
5282e284 | 2450 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2451 | action_fifos_exit(); |
595e069a | 2452 | compat_exit(); |
064af421 BP |
2453 | } |
2454 | ||
2455 | module_init(dp_init); | |
2456 | module_exit(dp_cleanup); | |
2457 | ||
2458 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2459 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2460 | MODULE_VERSION(VERSION); |