Commit | Line | Data |
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ccb1352e | 1 | /* |
ad552007 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
3 | * |
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 | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if_vlan.h> | |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
27 | #include <linux/jhash.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/genetlink.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/kthread.h> | |
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> | |
ccb1352e JG |
39 | #include <linux/ethtool.h> |
40 | #include <linux/wait.h> | |
ccb1352e JG |
41 | #include <asm/div64.h> |
42 | #include <linux/highmem.h> | |
43 | #include <linux/netfilter_bridge.h> | |
44 | #include <linux/netfilter_ipv4.h> | |
45 | #include <linux/inetdevice.h> | |
46 | #include <linux/list.h> | |
47 | #include <linux/openvswitch.h> | |
48 | #include <linux/rculist.h> | |
49 | #include <linux/dmi.h> | |
ccb1352e | 50 | #include <net/genetlink.h> |
46df7b81 PS |
51 | #include <net/net_namespace.h> |
52 | #include <net/netns/generic.h> | |
ccb1352e JG |
53 | |
54 | #include "datapath.h" | |
55 | #include "flow.h" | |
e80857cc | 56 | #include "flow_table.h" |
e6445719 | 57 | #include "flow_netlink.h" |
96fbc13d | 58 | #include "meter.h" |
ccb1352e | 59 | #include "vport-internal_dev.h" |
cff63a52 | 60 | #include "vport-netdev.h" |
ccb1352e | 61 | |
c7d03a00 | 62 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 63 | |
0c200ef9 PS |
64 | static struct genl_family dp_packet_genl_family; |
65 | static struct genl_family dp_flow_genl_family; | |
66 | static struct genl_family dp_datapath_genl_family; | |
67 | ||
74ed7ab9 JS |
68 | static const struct nla_policy flow_policy[]; |
69 | ||
48e48a70 | 70 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
71 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
72 | }; |
73 | ||
48e48a70 | 74 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
75 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
76 | }; |
77 | ||
48e48a70 | 78 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
79 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
80 | }; |
81 | ||
fb5d1e9e JR |
82 | /* Check if need to build a reply message. |
83 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
84 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
85 | unsigned int group) | |
fb5d1e9e JR |
86 | { |
87 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 88 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
89 | } |
90 | ||
68eb5503 | 91 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 92 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 93 | { |
92c14d9b | 94 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
95 | } |
96 | ||
ccb1352e JG |
97 | /** |
98 | * DOC: Locking: | |
99 | * | |
8e4e1713 PS |
100 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
101 | * operations on vports, etc.), Writes to other state (flow table | |
102 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
103 | * by ovs_lock. | |
ccb1352e JG |
104 | * |
105 | * Reads are protected by RCU. | |
106 | * | |
107 | * There are a few special cases (mostly stats) that have their own | |
108 | * synchronization but they nest under all of above and don't interact with | |
109 | * each other. | |
8e4e1713 PS |
110 | * |
111 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
112 | */ |
113 | ||
8e4e1713 PS |
114 | static DEFINE_MUTEX(ovs_mutex); |
115 | ||
116 | void ovs_lock(void) | |
117 | { | |
118 | mutex_lock(&ovs_mutex); | |
119 | } | |
120 | ||
121 | void ovs_unlock(void) | |
122 | { | |
123 | mutex_unlock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | #ifdef CONFIG_LOCKDEP | |
127 | int lockdep_ovsl_is_held(void) | |
128 | { | |
129 | if (debug_locks) | |
130 | return lockdep_is_held(&ovs_mutex); | |
131 | else | |
132 | return 1; | |
133 | } | |
134 | #endif | |
135 | ||
ccb1352e | 136 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 137 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 138 | const struct sw_flow_key *, |
f2a4d086 WT |
139 | const struct dp_upcall_info *, |
140 | uint32_t cutlen); | |
8055a89c | 141 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 142 | const struct sw_flow_key *, |
f2a4d086 WT |
143 | const struct dp_upcall_info *, |
144 | uint32_t cutlen); | |
ccb1352e | 145 | |
8e4e1713 | 146 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 147 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 148 | { |
8e4e1713 | 149 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 150 | return ovs_vport_name(vport); |
ccb1352e JG |
151 | } |
152 | ||
12eb18f7 | 153 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
154 | { |
155 | struct vport *local; | |
156 | int ifindex; | |
157 | ||
158 | rcu_read_lock(); | |
159 | ||
15eac2a7 | 160 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 161 | if (local) |
be4ace6e | 162 | ifindex = local->dev->ifindex; |
ccb1352e JG |
163 | else |
164 | ifindex = 0; | |
165 | ||
166 | rcu_read_unlock(); | |
167 | ||
168 | return ifindex; | |
169 | } | |
170 | ||
171 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
172 | { | |
173 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
174 | ||
9b996e54 | 175 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 176 | free_percpu(dp->stats_percpu); |
15eac2a7 | 177 | kfree(dp->ports); |
96fbc13d | 178 | ovs_meters_exit(dp); |
ccb1352e JG |
179 | kfree(dp); |
180 | } | |
181 | ||
15eac2a7 PS |
182 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
183 | u16 port_no) | |
184 | { | |
185 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
186 | } | |
187 | ||
bb6f9a70 | 188 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
189 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
190 | { | |
191 | struct vport *vport; | |
15eac2a7 PS |
192 | struct hlist_head *head; |
193 | ||
194 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 195 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
196 | if (vport->port_no == port_no) |
197 | return vport; | |
198 | } | |
199 | return NULL; | |
200 | } | |
201 | ||
8e4e1713 | 202 | /* Called with ovs_mutex. */ |
ccb1352e JG |
203 | static struct vport *new_vport(const struct vport_parms *parms) |
204 | { | |
205 | struct vport *vport; | |
206 | ||
207 | vport = ovs_vport_add(parms); | |
208 | if (!IS_ERR(vport)) { | |
209 | struct datapath *dp = parms->dp; | |
15eac2a7 | 210 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 211 | |
15eac2a7 | 212 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 213 | } |
ccb1352e JG |
214 | return vport; |
215 | } | |
216 | ||
ccb1352e JG |
217 | void ovs_dp_detach_port(struct vport *p) |
218 | { | |
8e4e1713 | 219 | ASSERT_OVSL(); |
ccb1352e JG |
220 | |
221 | /* First drop references to device. */ | |
15eac2a7 | 222 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
223 | |
224 | /* Then destroy it. */ | |
225 | ovs_vport_del(p); | |
226 | } | |
227 | ||
228 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 229 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 230 | { |
83c8df26 | 231 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
232 | struct datapath *dp = p->dp; |
233 | struct sw_flow *flow; | |
d98612b8 | 234 | struct sw_flow_actions *sf_acts; |
ccb1352e | 235 | struct dp_stats_percpu *stats; |
ccb1352e | 236 | u64 *stats_counter; |
1bd7116f | 237 | u32 n_mask_hit; |
ccb1352e | 238 | |
404f2f10 | 239 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 240 | |
ccb1352e | 241 | /* Look up flow. */ |
8c8b1b83 | 242 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, &n_mask_hit); |
ccb1352e JG |
243 | if (unlikely(!flow)) { |
244 | struct dp_upcall_info upcall; | |
8c8b1b83 | 245 | int error; |
ccb1352e | 246 | |
ccea7445 | 247 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 248 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 249 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 250 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 251 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
252 | if (unlikely(error)) |
253 | kfree_skb(skb); | |
254 | else | |
255 | consume_skb(skb); | |
ccb1352e JG |
256 | stats_counter = &stats->n_missed; |
257 | goto out; | |
258 | } | |
259 | ||
d98612b8 LJ |
260 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
261 | sf_acts = rcu_dereference(flow->sf_acts); | |
262 | ovs_execute_actions(dp, skb, sf_acts, key); | |
ccb1352e | 263 | |
e298e505 | 264 | stats_counter = &stats->n_hit; |
ccb1352e JG |
265 | |
266 | out: | |
267 | /* Update datapath statistics. */ | |
df9d9fdf | 268 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 269 | (*stats_counter)++; |
1bd7116f | 270 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 271 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
272 | } |
273 | ||
ccb1352e | 274 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 275 | const struct sw_flow_key *key, |
f2a4d086 WT |
276 | const struct dp_upcall_info *upcall_info, |
277 | uint32_t cutlen) | |
ccb1352e JG |
278 | { |
279 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
280 | int err; |
281 | ||
15e47304 | 282 | if (upcall_info->portid == 0) { |
ccb1352e JG |
283 | err = -ENOTCONN; |
284 | goto err; | |
285 | } | |
286 | ||
ccb1352e | 287 | if (!skb_is_gso(skb)) |
f2a4d086 | 288 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 289 | else |
f2a4d086 | 290 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
291 | if (err) |
292 | goto err; | |
293 | ||
294 | return 0; | |
295 | ||
296 | err: | |
404f2f10 | 297 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 298 | |
df9d9fdf | 299 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 300 | stats->n_lost++; |
df9d9fdf | 301 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
302 | |
303 | return err; | |
304 | } | |
305 | ||
8055a89c | 306 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 307 | const struct sw_flow_key *key, |
f2a4d086 WT |
308 | const struct dp_upcall_info *upcall_info, |
309 | uint32_t cutlen) | |
ccb1352e | 310 | { |
2734166e | 311 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 312 | struct sw_flow_key later_key; |
ccb1352e JG |
313 | struct sk_buff *segs, *nskb; |
314 | int err; | |
315 | ||
9207f9d4 | 316 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 317 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
318 | if (IS_ERR(segs)) |
319 | return PTR_ERR(segs); | |
330966e5 FW |
320 | if (segs == NULL) |
321 | return -EINVAL; | |
ccb1352e | 322 | |
0c19f846 WB |
323 | if (gso_type & SKB_GSO_UDP) { |
324 | /* The initial flow key extracted by ovs_flow_key_extract() | |
325 | * in this case is for a first fragment, so we need to | |
326 | * properly mark later fragments. | |
327 | */ | |
328 | later_key = *key; | |
329 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
330 | } | |
331 | ||
ccb1352e JG |
332 | /* Queue all of the segments. */ |
333 | skb = segs; | |
334 | do { | |
0c19f846 WB |
335 | if (gso_type & SKB_GSO_UDP && skb != segs) |
336 | key = &later_key; | |
337 | ||
f2a4d086 | 338 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
339 | if (err) |
340 | break; | |
341 | ||
ccb1352e JG |
342 | } while ((skb = skb->next)); |
343 | ||
344 | /* Free all of the segments. */ | |
345 | skb = segs; | |
346 | do { | |
347 | nskb = skb->next; | |
348 | if (err) | |
349 | kfree_skb(skb); | |
350 | else | |
351 | consume_skb(skb); | |
352 | } while ((skb = nskb)); | |
353 | return err; | |
354 | } | |
355 | ||
8f0aad6f | 356 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 357 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
358 | { |
359 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 360 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
361 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
362 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
363 | |
364 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
365 | if (upcall_info->userdata) |
366 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
367 | ||
368 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
369 | if (upcall_info->egress_tun_info) | |
370 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 371 | |
ccea7445 NM |
372 | /* OVS_PACKET_ATTR_ACTIONS */ |
373 | if (upcall_info->actions_len) | |
494bea39 | 374 | size += nla_total_size(actions_attrlen); |
ccea7445 | 375 | |
7f8a436e JS |
376 | /* OVS_PACKET_ATTR_MRU */ |
377 | if (upcall_info->mru) | |
378 | size += nla_total_size(sizeof(upcall_info->mru)); | |
379 | ||
c3ff8cfe TG |
380 | return size; |
381 | } | |
382 | ||
7f8a436e JS |
383 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
384 | { | |
385 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
386 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
387 | ||
388 | if (plen > 0) | |
b080db58 | 389 | skb_put_zero(skb, plen); |
7f8a436e JS |
390 | } |
391 | } | |
392 | ||
8055a89c | 393 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 394 | const struct sw_flow_key *key, |
f2a4d086 WT |
395 | const struct dp_upcall_info *upcall_info, |
396 | uint32_t cutlen) | |
ccb1352e JG |
397 | { |
398 | struct ovs_header *upcall; | |
399 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 400 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 401 | struct nlattr *nla; |
795449d8 | 402 | size_t len; |
bda56f14 | 403 | unsigned int hlen; |
8055a89c TG |
404 | int err, dp_ifindex; |
405 | ||
406 | dp_ifindex = get_dpifindex(dp); | |
407 | if (!dp_ifindex) | |
408 | return -ENODEV; | |
ccb1352e | 409 | |
df8a39de | 410 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
411 | nskb = skb_clone(skb, GFP_ATOMIC); |
412 | if (!nskb) | |
413 | return -ENOMEM; | |
414 | ||
5968250c | 415 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 416 | if (!nskb) |
ccb1352e JG |
417 | return -ENOMEM; |
418 | ||
ccb1352e JG |
419 | skb = nskb; |
420 | } | |
421 | ||
422 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
423 | err = -EFBIG; | |
424 | goto out; | |
425 | } | |
426 | ||
bda56f14 TG |
427 | /* Complete checksum if needed */ |
428 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 429 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
430 | goto out; |
431 | ||
432 | /* Older versions of OVS user space enforce alignment of the last | |
433 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
434 | * padding logic. Only perform zerocopy if padding is not required. | |
435 | */ | |
436 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
437 | hlen = skb_zerocopy_headlen(skb); | |
438 | else | |
439 | hlen = skb->len; | |
440 | ||
494bea39 LZ |
441 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
442 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 443 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
444 | if (!user_skb) { |
445 | err = -ENOMEM; | |
446 | goto out; | |
447 | } | |
448 | ||
449 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
450 | 0, upcall_info->cmd); | |
451 | upcall->dp_ifindex = dp_ifindex; | |
452 | ||
5b4237bb | 453 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
f53e3831 | 454 | BUG_ON(err); |
ccb1352e JG |
455 | |
456 | if (upcall_info->userdata) | |
4490108b BP |
457 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
458 | nla_len(upcall_info->userdata), | |
459 | nla_data(upcall_info->userdata)); | |
ccb1352e | 460 | |
8f0aad6f WZ |
461 | if (upcall_info->egress_tun_info) { |
462 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
fc4099f1 PS |
463 | err = ovs_nla_put_tunnel_info(user_skb, |
464 | upcall_info->egress_tun_info); | |
8f0aad6f WZ |
465 | BUG_ON(err); |
466 | nla_nest_end(user_skb, nla); | |
467 | } | |
468 | ||
ccea7445 NM |
469 | if (upcall_info->actions_len) { |
470 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
471 | err = ovs_nla_put_actions(upcall_info->actions, | |
472 | upcall_info->actions_len, | |
473 | user_skb); | |
474 | if (!err) | |
475 | nla_nest_end(user_skb, nla); | |
476 | else | |
477 | nla_nest_cancel(user_skb, nla); | |
478 | } | |
479 | ||
7f8a436e JS |
480 | /* Add OVS_PACKET_ATTR_MRU */ |
481 | if (upcall_info->mru) { | |
482 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
483 | upcall_info->mru)) { | |
484 | err = -ENOBUFS; | |
485 | goto out; | |
486 | } | |
487 | pad_packet(dp, user_skb); | |
488 | } | |
489 | ||
b95e5928 WT |
490 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
491 | if (cutlen > 0) { | |
492 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
493 | skb->len)) { | |
494 | err = -ENOBUFS; | |
495 | goto out; | |
496 | } | |
497 | pad_packet(dp, user_skb); | |
498 | } | |
499 | ||
bda56f14 TG |
500 | /* Only reserve room for attribute header, packet data is added |
501 | * in skb_zerocopy() */ | |
502 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
503 | err = -ENOBUFS; | |
504 | goto out; | |
505 | } | |
f2a4d086 | 506 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 507 | |
f2a4d086 | 508 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
509 | if (err) |
510 | goto out; | |
ccb1352e | 511 | |
aea0bb4f | 512 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 513 | pad_packet(dp, user_skb); |
aea0bb4f | 514 | |
bda56f14 | 515 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 516 | |
bda56f14 | 517 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 518 | user_skb = NULL; |
ccb1352e | 519 | out: |
36d5fe6a ZK |
520 | if (err) |
521 | skb_tx_error(skb); | |
4ee45ea0 | 522 | kfree_skb(user_skb); |
ccb1352e JG |
523 | kfree_skb(nskb); |
524 | return err; | |
525 | } | |
526 | ||
ccb1352e JG |
527 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
528 | { | |
529 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 530 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
531 | struct nlattr **a = info->attrs; |
532 | struct sw_flow_actions *acts; | |
533 | struct sk_buff *packet; | |
534 | struct sw_flow *flow; | |
d98612b8 | 535 | struct sw_flow_actions *sf_acts; |
ccb1352e | 536 | struct datapath *dp; |
83c8df26 | 537 | struct vport *input_vport; |
7f8a436e | 538 | u16 mru = 0; |
ccb1352e JG |
539 | int len; |
540 | int err; | |
1ba39804 | 541 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
542 | |
543 | err = -EINVAL; | |
544 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 545 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
546 | goto err; |
547 | ||
548 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
549 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
550 | err = -ENOMEM; | |
551 | if (!packet) | |
552 | goto err; | |
553 | skb_reserve(packet, NET_IP_ALIGN); | |
554 | ||
32686a9d | 555 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 556 | |
7f8a436e JS |
557 | /* Set packet's mru */ |
558 | if (a[OVS_PACKET_ATTR_MRU]) { | |
559 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
560 | packet->ignore_df = 1; | |
561 | } | |
562 | OVS_CB(packet)->mru = mru; | |
563 | ||
ccb1352e | 564 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 565 | flow = ovs_flow_alloc(); |
ccb1352e JG |
566 | err = PTR_ERR(flow); |
567 | if (IS_ERR(flow)) | |
568 | goto err_kfree_skb; | |
569 | ||
c2ac6673 JS |
570 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
571 | packet, &flow->key, log); | |
ccb1352e JG |
572 | if (err) |
573 | goto err_flow_free; | |
574 | ||
7f8a436e | 575 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 576 | &flow->key, &acts, log); |
74f84a57 PS |
577 | if (err) |
578 | goto err_flow_free; | |
ccb1352e | 579 | |
f5796684 | 580 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 581 | packet->priority = flow->key.phy.priority; |
39c7caeb | 582 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
583 | |
584 | rcu_read_lock(); | |
7f8a436e | 585 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
586 | err = -ENODEV; |
587 | if (!dp) | |
588 | goto err_unlock; | |
589 | ||
83c8df26 PS |
590 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
591 | if (!input_vport) | |
592 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
593 | ||
594 | if (!input_vport) | |
595 | goto err_unlock; | |
596 | ||
7f8a436e | 597 | packet->dev = input_vport->dev; |
83c8df26 | 598 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 599 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 600 | |
ccb1352e | 601 | local_bh_disable(); |
d98612b8 | 602 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
603 | local_bh_enable(); |
604 | rcu_read_unlock(); | |
605 | ||
03f0d916 | 606 | ovs_flow_free(flow, false); |
ccb1352e JG |
607 | return err; |
608 | ||
609 | err_unlock: | |
610 | rcu_read_unlock(); | |
611 | err_flow_free: | |
03f0d916 | 612 | ovs_flow_free(flow, false); |
ccb1352e JG |
613 | err_kfree_skb: |
614 | kfree_skb(packet); | |
615 | err: | |
616 | return err; | |
617 | } | |
618 | ||
619 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 620 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
621 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
622 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 623 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 624 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
625 | }; |
626 | ||
4534de83 | 627 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 628 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
4a92602a | 629 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
630 | .policy = packet_policy, |
631 | .doit = ovs_packet_cmd_execute | |
632 | } | |
633 | }; | |
634 | ||
56989f6d | 635 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
636 | .hdrsize = sizeof(struct ovs_header), |
637 | .name = OVS_PACKET_FAMILY, | |
638 | .version = OVS_PACKET_VERSION, | |
639 | .maxattr = OVS_PACKET_ATTR_MAX, | |
640 | .netnsok = true, | |
641 | .parallel_ops = true, | |
642 | .ops = dp_packet_genl_ops, | |
643 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 644 | .module = THIS_MODULE, |
0c200ef9 PS |
645 | }; |
646 | ||
12eb18f7 | 647 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 648 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
649 | { |
650 | int i; | |
ccb1352e | 651 | |
1bd7116f AZ |
652 | memset(mega_stats, 0, sizeof(*mega_stats)); |
653 | ||
b637e498 | 654 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 655 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
656 | |
657 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 658 | |
ccb1352e JG |
659 | for_each_possible_cpu(i) { |
660 | const struct dp_stats_percpu *percpu_stats; | |
661 | struct dp_stats_percpu local_stats; | |
662 | unsigned int start; | |
663 | ||
664 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
665 | ||
666 | do { | |
57a7744e | 667 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 668 | local_stats = *percpu_stats; |
57a7744e | 669 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
670 | |
671 | stats->n_hit += local_stats.n_hit; | |
672 | stats->n_missed += local_stats.n_missed; | |
673 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 674 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
675 | } |
676 | } | |
677 | ||
74ed7ab9 JS |
678 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
679 | { | |
680 | return ovs_identifier_is_ufid(sfid) && | |
681 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
682 | } | |
683 | ||
684 | static bool should_fill_mask(uint32_t ufid_flags) | |
685 | { | |
686 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
687 | } | |
688 | ||
689 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 690 | { |
74ed7ab9 JS |
691 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
692 | } | |
693 | ||
694 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
695 | const struct sw_flow_id *sfid, | |
696 | uint32_t ufid_flags) | |
697 | { | |
698 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
699 | ||
700 | /* OVS_FLOW_ATTR_UFID */ | |
701 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
702 | len += nla_total_size(sfid->ufid_len); | |
703 | ||
704 | /* OVS_FLOW_ATTR_KEY */ | |
705 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
706 | len += nla_total_size(ovs_key_attr_size()); | |
707 | ||
708 | /* OVS_FLOW_ATTR_MASK */ | |
709 | if (should_fill_mask(ufid_flags)) | |
710 | len += nla_total_size(ovs_key_attr_size()); | |
711 | ||
712 | /* OVS_FLOW_ATTR_ACTIONS */ | |
713 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 714 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
715 | |
716 | return len | |
66c7a5ee | 717 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 718 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 719 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
720 | } |
721 | ||
ca7105f2 JS |
722 | /* Called with ovs_mutex or RCU read lock. */ |
723 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
724 | struct sk_buff *skb) | |
725 | { | |
726 | struct ovs_flow_stats stats; | |
727 | __be16 tcp_flags; | |
728 | unsigned long used; | |
ccb1352e | 729 | |
e298e505 | 730 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 731 | |
028d6a67 | 732 | if (used && |
0238b720 ND |
733 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
734 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 735 | return -EMSGSIZE; |
ccb1352e | 736 | |
028d6a67 | 737 | if (stats.n_packets && |
66c7a5ee ND |
738 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
739 | sizeof(struct ovs_flow_stats), &stats, | |
740 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 741 | return -EMSGSIZE; |
ccb1352e | 742 | |
e298e505 PS |
743 | if ((u8)ntohs(tcp_flags) && |
744 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
745 | return -EMSGSIZE; |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | /* Called with ovs_mutex or RCU read lock. */ | |
751 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
752 | struct sk_buff *skb, int skb_orig_len) | |
753 | { | |
754 | struct nlattr *start; | |
755 | int err; | |
ccb1352e JG |
756 | |
757 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
758 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
759 | * Netlink but individual action lists can be longer than | |
760 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
761 | * The userspace caller can always fetch the actions separately if it | |
762 | * really wants them. (Most userspace callers in fact don't care.) | |
763 | * | |
764 | * This can only fail for dump operations because the skb is always | |
765 | * properly sized for single flows. | |
766 | */ | |
74f84a57 PS |
767 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
768 | if (start) { | |
d57170b1 PS |
769 | const struct sw_flow_actions *sf_acts; |
770 | ||
663efa36 | 771 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
772 | err = ovs_nla_put_actions(sf_acts->actions, |
773 | sf_acts->actions_len, skb); | |
0e9796b4 | 774 | |
74f84a57 PS |
775 | if (!err) |
776 | nla_nest_end(skb, start); | |
777 | else { | |
778 | if (skb_orig_len) | |
ca7105f2 | 779 | return err; |
74f84a57 PS |
780 | |
781 | nla_nest_cancel(skb, start); | |
782 | } | |
ca7105f2 JS |
783 | } else if (skb_orig_len) { |
784 | return -EMSGSIZE; | |
785 | } | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | /* Called with ovs_mutex or RCU read lock. */ | |
791 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
792 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 793 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
794 | { |
795 | const int skb_orig_len = skb->len; | |
796 | struct ovs_header *ovs_header; | |
797 | int err; | |
798 | ||
799 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
800 | flags, cmd); | |
801 | if (!ovs_header) | |
802 | return -EMSGSIZE; | |
803 | ||
804 | ovs_header->dp_ifindex = dp_ifindex; | |
805 | ||
74ed7ab9 | 806 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
807 | if (err) |
808 | goto error; | |
809 | ||
74ed7ab9 JS |
810 | if (should_fill_key(&flow->id, ufid_flags)) { |
811 | err = ovs_nla_put_masked_key(flow, skb); | |
812 | if (err) | |
813 | goto error; | |
814 | } | |
815 | ||
816 | if (should_fill_mask(ufid_flags)) { | |
817 | err = ovs_nla_put_mask(flow, skb); | |
818 | if (err) | |
819 | goto error; | |
820 | } | |
ca7105f2 JS |
821 | |
822 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
823 | if (err) | |
824 | goto error; | |
825 | ||
74ed7ab9 JS |
826 | if (should_fill_actions(ufid_flags)) { |
827 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
828 | if (err) | |
829 | goto error; | |
830 | } | |
ccb1352e | 831 | |
053c095a JB |
832 | genlmsg_end(skb, ovs_header); |
833 | return 0; | |
ccb1352e | 834 | |
ccb1352e JG |
835 | error: |
836 | genlmsg_cancel(skb, ovs_header); | |
837 | return err; | |
838 | } | |
839 | ||
0e9796b4 JR |
840 | /* May not be called with RCU read lock. */ |
841 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 842 | const struct sw_flow_id *sfid, |
fb5d1e9e | 843 | struct genl_info *info, |
74ed7ab9 JS |
844 | bool always, |
845 | uint32_t ufid_flags) | |
ccb1352e | 846 | { |
fb5d1e9e | 847 | struct sk_buff *skb; |
74ed7ab9 | 848 | size_t len; |
ccb1352e | 849 | |
9b67aa4a | 850 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
851 | return NULL; |
852 | ||
74ed7ab9 | 853 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 854 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
855 | if (!skb) |
856 | return ERR_PTR(-ENOMEM); | |
857 | ||
858 | return skb; | |
ccb1352e JG |
859 | } |
860 | ||
0e9796b4 JR |
861 | /* Called with ovs_mutex. */ |
862 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
863 | int dp_ifindex, | |
864 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 865 | bool always, u32 ufid_flags) |
ccb1352e JG |
866 | { |
867 | struct sk_buff *skb; | |
868 | int retval; | |
869 | ||
74ed7ab9 JS |
870 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
871 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 872 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 873 | return skb; |
ccb1352e | 874 | |
0e9796b4 JR |
875 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
876 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 877 | cmd, ufid_flags); |
ccb1352e JG |
878 | BUG_ON(retval < 0); |
879 | return skb; | |
880 | } | |
881 | ||
37bdc87b | 882 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 883 | { |
7f8a436e | 884 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
885 | struct nlattr **a = info->attrs; |
886 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 887 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 888 | struct sw_flow_mask mask; |
ccb1352e JG |
889 | struct sk_buff *reply; |
890 | struct datapath *dp; | |
37bdc87b | 891 | struct sw_flow_actions *acts; |
03f0d916 | 892 | struct sw_flow_match match; |
74ed7ab9 | 893 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 894 | int error; |
05da5898 | 895 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 896 | |
893f139b | 897 | /* Must have key and actions. */ |
ccb1352e | 898 | error = -EINVAL; |
426cda5c | 899 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 900 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 901 | goto error; |
426cda5c JG |
902 | } |
903 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 904 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 905 | goto error; |
426cda5c | 906 | } |
03f0d916 | 907 | |
893f139b JR |
908 | /* Most of the time we need to allocate a new flow, do it before |
909 | * locking. | |
910 | */ | |
911 | new_flow = ovs_flow_alloc(); | |
912 | if (IS_ERR(new_flow)) { | |
913 | error = PTR_ERR(new_flow); | |
914 | goto error; | |
915 | } | |
916 | ||
917 | /* Extract key. */ | |
2279994d | 918 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 919 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 920 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 921 | if (error) |
893f139b | 922 | goto err_kfree_flow; |
ccb1352e | 923 | |
74ed7ab9 JS |
924 | /* Extract flow identifier. */ |
925 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 926 | &new_flow->key, log); |
74ed7ab9 JS |
927 | if (error) |
928 | goto err_kfree_flow; | |
74f84a57 | 929 | |
190aa3e7 | 930 | /* unmasked key is needed to match when ufid is not used. */ |
931 | if (ovs_identifier_is_key(&new_flow->id)) | |
932 | match.key = new_flow->id.unmasked_key; | |
933 | ||
934 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
935 | ||
893f139b | 936 | /* Validate actions. */ |
7f8a436e JS |
937 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
938 | &new_flow->key, &acts, log); | |
37bdc87b | 939 | if (error) { |
05da5898 | 940 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 941 | goto err_kfree_flow; |
893f139b JR |
942 | } |
943 | ||
74ed7ab9 JS |
944 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
945 | ufid_flags); | |
893f139b JR |
946 | if (IS_ERR(reply)) { |
947 | error = PTR_ERR(reply); | |
948 | goto err_kfree_acts; | |
ccb1352e JG |
949 | } |
950 | ||
8e4e1713 | 951 | ovs_lock(); |
7f8a436e | 952 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
953 | if (unlikely(!dp)) { |
954 | error = -ENODEV; | |
8e4e1713 | 955 | goto err_unlock_ovs; |
893f139b | 956 | } |
74ed7ab9 | 957 | |
03f0d916 | 958 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
959 | if (ovs_identifier_is_ufid(&new_flow->id)) |
960 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
961 | if (!flow) | |
190aa3e7 | 962 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
963 | if (likely(!flow)) { |
964 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
965 | |
966 | /* Put flow in bucket. */ | |
893f139b JR |
967 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
968 | if (unlikely(error)) { | |
618ed0c8 | 969 | acts = NULL; |
893f139b JR |
970 | goto err_unlock_ovs; |
971 | } | |
972 | ||
973 | if (unlikely(reply)) { | |
974 | error = ovs_flow_cmd_fill_info(new_flow, | |
975 | ovs_header->dp_ifindex, | |
976 | reply, info->snd_portid, | |
977 | info->snd_seq, 0, | |
74ed7ab9 JS |
978 | OVS_FLOW_CMD_NEW, |
979 | ufid_flags); | |
893f139b | 980 | BUG_ON(error < 0); |
618ed0c8 | 981 | } |
893f139b | 982 | ovs_unlock(); |
ccb1352e | 983 | } else { |
37bdc87b JR |
984 | struct sw_flow_actions *old_acts; |
985 | ||
ccb1352e JG |
986 | /* Bail out if we're not allowed to modify an existing flow. |
987 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
988 | * because Generic Netlink treats the latter as a dump | |
989 | * request. We also accept NLM_F_EXCL in case that bug ever | |
990 | * gets fixed. | |
991 | */ | |
893f139b JR |
992 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
993 | | NLM_F_EXCL))) { | |
994 | error = -EEXIST; | |
8e4e1713 | 995 | goto err_unlock_ovs; |
893f139b | 996 | } |
74ed7ab9 JS |
997 | /* The flow identifier has to be the same for flow updates. |
998 | * Look for any overlapping flow. | |
999 | */ | |
1000 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1001 | if (ovs_identifier_is_key(&flow->id)) | |
1002 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1003 | &match); | |
1004 | else /* UFID matches but key is different */ | |
1005 | flow = NULL; | |
4a46b24e AW |
1006 | if (!flow) { |
1007 | error = -ENOENT; | |
1008 | goto err_unlock_ovs; | |
1009 | } | |
893f139b | 1010 | } |
37bdc87b JR |
1011 | /* Update actions. */ |
1012 | old_acts = ovsl_dereference(flow->sf_acts); | |
1013 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1014 | |
893f139b JR |
1015 | if (unlikely(reply)) { |
1016 | error = ovs_flow_cmd_fill_info(flow, | |
1017 | ovs_header->dp_ifindex, | |
1018 | reply, info->snd_portid, | |
1019 | info->snd_seq, 0, | |
74ed7ab9 JS |
1020 | OVS_FLOW_CMD_NEW, |
1021 | ufid_flags); | |
893f139b JR |
1022 | BUG_ON(error < 0); |
1023 | } | |
1024 | ovs_unlock(); | |
37bdc87b | 1025 | |
34ae932a | 1026 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1027 | ovs_flow_free(new_flow, false); |
37bdc87b | 1028 | } |
893f139b JR |
1029 | |
1030 | if (reply) | |
1031 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1032 | return 0; |
1033 | ||
37bdc87b JR |
1034 | err_unlock_ovs: |
1035 | ovs_unlock(); | |
893f139b JR |
1036 | kfree_skb(reply); |
1037 | err_kfree_acts: | |
34ae932a | 1038 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1039 | err_kfree_flow: |
1040 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1041 | error: |
1042 | return error; | |
1043 | } | |
ccb1352e | 1044 | |
2fdb957d | 1045 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
7f8a436e JS |
1046 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1047 | const struct nlattr *a, | |
6b205b2c | 1048 | const struct sw_flow_key *key, |
05da5898 JR |
1049 | const struct sw_flow_mask *mask, |
1050 | bool log) | |
6b205b2c JG |
1051 | { |
1052 | struct sw_flow_actions *acts; | |
1053 | struct sw_flow_key masked_key; | |
1054 | int error; | |
1055 | ||
ae5f2fb1 | 1056 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1057 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1058 | if (error) { |
05da5898 JR |
1059 | OVS_NLERR(log, |
1060 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1061 | return ERR_PTR(error); |
1062 | } | |
1063 | ||
1064 | return acts; | |
1065 | } | |
1066 | ||
9cc9a5cb TZ |
1067 | /* Factor out match-init and action-copy to avoid |
1068 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1069 | * used to get actions, we new a function to save some | |
1070 | * stack space. | |
1071 | * | |
1072 | * If there are not key and action attrs, we return 0 | |
1073 | * directly. In the case, the caller will also not use the | |
1074 | * match as before. If there is action attr, we try to get | |
1075 | * actions and save them to *acts. Before returning from | |
1076 | * the function, we reset the match->mask pointer. Because | |
1077 | * we should not to return match object with dangling reference | |
1078 | * to mask. | |
1079 | * */ | |
1080 | static int ovs_nla_init_match_and_action(struct net *net, | |
1081 | struct sw_flow_match *match, | |
1082 | struct sw_flow_key *key, | |
1083 | struct nlattr **a, | |
1084 | struct sw_flow_actions **acts, | |
1085 | bool log) | |
1086 | { | |
1087 | struct sw_flow_mask mask; | |
1088 | int error = 0; | |
1089 | ||
1090 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1091 | ovs_match_init(match, key, true, &mask); | |
1092 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1093 | a[OVS_FLOW_ATTR_MASK], log); | |
1094 | if (error) | |
1095 | goto error; | |
1096 | } | |
1097 | ||
1098 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1099 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1100 | OVS_NLERR(log, | |
1101 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1102 | error = -EINVAL; |
1103 | goto error; | |
9cc9a5cb TZ |
1104 | } |
1105 | ||
1106 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1107 | &mask, log); | |
1108 | if (IS_ERR(*acts)) { | |
1109 | error = PTR_ERR(*acts); | |
1110 | goto error; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | /* On success, error is 0. */ | |
1115 | error: | |
1116 | match->mask = NULL; | |
1117 | return error; | |
1118 | } | |
1119 | ||
37bdc87b JR |
1120 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1121 | { | |
7f8a436e | 1122 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1123 | struct nlattr **a = info->attrs; |
1124 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1125 | struct sw_flow_key key; |
37bdc87b | 1126 | struct sw_flow *flow; |
37bdc87b JR |
1127 | struct sk_buff *reply = NULL; |
1128 | struct datapath *dp; | |
893f139b | 1129 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1130 | struct sw_flow_match match; |
74ed7ab9 JS |
1131 | struct sw_flow_id sfid; |
1132 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1133 | int error = 0; |
05da5898 | 1134 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1135 | bool ufid_present; |
37bdc87b | 1136 | |
74ed7ab9 | 1137 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1138 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1139 | OVS_NLERR(log, |
1140 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1141 | return -EINVAL; |
6f15cdbf | 1142 | } |
9cc9a5cb TZ |
1143 | |
1144 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1145 | &acts, log); | |
37bdc87b JR |
1146 | if (error) |
1147 | goto error; | |
1148 | ||
9cc9a5cb | 1149 | if (acts) { |
2fdb957d | 1150 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1151 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1152 | ufid_flags); | |
893f139b JR |
1153 | if (IS_ERR(reply)) { |
1154 | error = PTR_ERR(reply); | |
1155 | goto err_kfree_acts; | |
be52c9e9 | 1156 | } |
37bdc87b | 1157 | } |
0e9796b4 | 1158 | |
37bdc87b | 1159 | ovs_lock(); |
7f8a436e | 1160 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1161 | if (unlikely(!dp)) { |
1162 | error = -ENODEV; | |
37bdc87b | 1163 | goto err_unlock_ovs; |
893f139b | 1164 | } |
37bdc87b | 1165 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1166 | if (ufid_present) |
1167 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1168 | else | |
1169 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1170 | if (unlikely(!flow)) { |
1171 | error = -ENOENT; | |
37bdc87b | 1172 | goto err_unlock_ovs; |
893f139b | 1173 | } |
4a46b24e | 1174 | |
37bdc87b | 1175 | /* Update actions, if present. */ |
893f139b | 1176 | if (likely(acts)) { |
37bdc87b JR |
1177 | old_acts = ovsl_dereference(flow->sf_acts); |
1178 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1179 | |
1180 | if (unlikely(reply)) { | |
1181 | error = ovs_flow_cmd_fill_info(flow, | |
1182 | ovs_header->dp_ifindex, | |
1183 | reply, info->snd_portid, | |
1184 | info->snd_seq, 0, | |
74ed7ab9 JS |
1185 | OVS_FLOW_CMD_NEW, |
1186 | ufid_flags); | |
893f139b JR |
1187 | BUG_ON(error < 0); |
1188 | } | |
1189 | } else { | |
1190 | /* Could not alloc without acts before locking. */ | |
1191 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
74ed7ab9 JS |
1192 | info, OVS_FLOW_CMD_NEW, false, |
1193 | ufid_flags); | |
1194 | ||
b5ffe634 | 1195 | if (IS_ERR(reply)) { |
893f139b JR |
1196 | error = PTR_ERR(reply); |
1197 | goto err_unlock_ovs; | |
1198 | } | |
ccb1352e | 1199 | } |
37bdc87b | 1200 | |
37bdc87b JR |
1201 | /* Clear stats. */ |
1202 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1203 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1204 | ovs_unlock(); |
ccb1352e | 1205 | |
893f139b JR |
1206 | if (reply) |
1207 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1208 | if (old_acts) | |
34ae932a | 1209 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1210 | |
ccb1352e JG |
1211 | return 0; |
1212 | ||
8e4e1713 PS |
1213 | err_unlock_ovs: |
1214 | ovs_unlock(); | |
893f139b JR |
1215 | kfree_skb(reply); |
1216 | err_kfree_acts: | |
34ae932a | 1217 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1218 | error: |
1219 | return error; | |
1220 | } | |
1221 | ||
1222 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1223 | { | |
1224 | struct nlattr **a = info->attrs; | |
1225 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1226 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1227 | struct sw_flow_key key; |
1228 | struct sk_buff *reply; | |
1229 | struct sw_flow *flow; | |
1230 | struct datapath *dp; | |
03f0d916 | 1231 | struct sw_flow_match match; |
74ed7ab9 JS |
1232 | struct sw_flow_id ufid; |
1233 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1234 | int err = 0; | |
05da5898 | 1235 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1236 | bool ufid_present; |
ccb1352e | 1237 | |
74ed7ab9 JS |
1238 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1239 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1240 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1241 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1242 | log); |
1243 | } else if (!ufid_present) { | |
05da5898 JR |
1244 | OVS_NLERR(log, |
1245 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1246 | err = -EINVAL; |
03f0d916 | 1247 | } |
ccb1352e JG |
1248 | if (err) |
1249 | return err; | |
1250 | ||
8e4e1713 | 1251 | ovs_lock(); |
46df7b81 | 1252 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1253 | if (!dp) { |
1254 | err = -ENODEV; | |
1255 | goto unlock; | |
1256 | } | |
ccb1352e | 1257 | |
74ed7ab9 JS |
1258 | if (ufid_present) |
1259 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1260 | else | |
1261 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1262 | if (!flow) { |
8e4e1713 PS |
1263 | err = -ENOENT; |
1264 | goto unlock; | |
1265 | } | |
ccb1352e | 1266 | |
0e9796b4 | 1267 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
74ed7ab9 | 1268 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
8e4e1713 PS |
1269 | if (IS_ERR(reply)) { |
1270 | err = PTR_ERR(reply); | |
1271 | goto unlock; | |
1272 | } | |
ccb1352e | 1273 | |
8e4e1713 | 1274 | ovs_unlock(); |
ccb1352e | 1275 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1276 | unlock: |
1277 | ovs_unlock(); | |
1278 | return err; | |
ccb1352e JG |
1279 | } |
1280 | ||
1281 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1282 | { | |
1283 | struct nlattr **a = info->attrs; | |
1284 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1285 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1286 | struct sw_flow_key key; |
1287 | struct sk_buff *reply; | |
74ed7ab9 | 1288 | struct sw_flow *flow = NULL; |
ccb1352e | 1289 | struct datapath *dp; |
03f0d916 | 1290 | struct sw_flow_match match; |
74ed7ab9 JS |
1291 | struct sw_flow_id ufid; |
1292 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1293 | int err; |
05da5898 | 1294 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1295 | bool ufid_present; |
ccb1352e | 1296 | |
74ed7ab9 JS |
1297 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1298 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1299 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1300 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1301 | NULL, log); | |
aed06778 JR |
1302 | if (unlikely(err)) |
1303 | return err; | |
1304 | } | |
1305 | ||
8e4e1713 | 1306 | ovs_lock(); |
46df7b81 | 1307 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1308 | if (unlikely(!dp)) { |
8e4e1713 PS |
1309 | err = -ENODEV; |
1310 | goto unlock; | |
1311 | } | |
46df7b81 | 1312 | |
74ed7ab9 | 1313 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1314 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1315 | goto unlock; |
1316 | } | |
03f0d916 | 1317 | |
74ed7ab9 JS |
1318 | if (ufid_present) |
1319 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1320 | else | |
1321 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1322 | if (unlikely(!flow)) { |
8e4e1713 PS |
1323 | err = -ENOENT; |
1324 | goto unlock; | |
1325 | } | |
ccb1352e | 1326 | |
b637e498 | 1327 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1328 | ovs_unlock(); |
ccb1352e | 1329 | |
aed06778 | 1330 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1331 | &flow->id, info, false, ufid_flags); |
aed06778 JR |
1332 | if (likely(reply)) { |
1333 | if (likely(!IS_ERR(reply))) { | |
1334 | rcu_read_lock(); /*To keep RCU checker happy. */ | |
1335 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1336 | reply, info->snd_portid, | |
1337 | info->snd_seq, 0, | |
74ed7ab9 JS |
1338 | OVS_FLOW_CMD_DEL, |
1339 | ufid_flags); | |
aed06778 JR |
1340 | rcu_read_unlock(); |
1341 | BUG_ON(err < 0); | |
1342 | ||
1343 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1344 | } else { | |
1345 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1346 | } | |
fb5d1e9e | 1347 | } |
ccb1352e | 1348 | |
aed06778 | 1349 | ovs_flow_free(flow, true); |
ccb1352e | 1350 | return 0; |
8e4e1713 PS |
1351 | unlock: |
1352 | ovs_unlock(); | |
1353 | return err; | |
ccb1352e JG |
1354 | } |
1355 | ||
1356 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1357 | { | |
74ed7ab9 | 1358 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1359 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1360 | struct table_instance *ti; |
ccb1352e | 1361 | struct datapath *dp; |
74ed7ab9 JS |
1362 | u32 ufid_flags; |
1363 | int err; | |
1364 | ||
1365 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
fceb6435 | 1366 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); |
74ed7ab9 JS |
1367 | if (err) |
1368 | return err; | |
1369 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1370 | |
d57170b1 | 1371 | rcu_read_lock(); |
cc3a5ae6 | 1372 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1373 | if (!dp) { |
d57170b1 | 1374 | rcu_read_unlock(); |
ccb1352e | 1375 | return -ENODEV; |
8e4e1713 | 1376 | } |
ccb1352e | 1377 | |
b637e498 | 1378 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1379 | for (;;) { |
1380 | struct sw_flow *flow; | |
1381 | u32 bucket, obj; | |
1382 | ||
1383 | bucket = cb->args[0]; | |
1384 | obj = cb->args[1]; | |
b637e498 | 1385 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1386 | if (!flow) |
1387 | break; | |
1388 | ||
0e9796b4 | 1389 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1390 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1391 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
74ed7ab9 | 1392 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
ccb1352e JG |
1393 | break; |
1394 | ||
1395 | cb->args[0] = bucket; | |
1396 | cb->args[1] = obj; | |
1397 | } | |
d57170b1 | 1398 | rcu_read_unlock(); |
ccb1352e JG |
1399 | return skb->len; |
1400 | } | |
1401 | ||
0c200ef9 PS |
1402 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1403 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1404 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1405 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1406 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1407 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1408 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1409 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1410 | }; |
1411 | ||
48e48a70 | 1412 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1413 | { .cmd = OVS_FLOW_CMD_NEW, |
4a92602a | 1414 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1415 | .policy = flow_policy, |
37bdc87b | 1416 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1417 | }, |
1418 | { .cmd = OVS_FLOW_CMD_DEL, | |
4a92602a | 1419 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1420 | .policy = flow_policy, |
1421 | .doit = ovs_flow_cmd_del | |
1422 | }, | |
1423 | { .cmd = OVS_FLOW_CMD_GET, | |
1424 | .flags = 0, /* OK for unprivileged users. */ | |
1425 | .policy = flow_policy, | |
1426 | .doit = ovs_flow_cmd_get, | |
1427 | .dumpit = ovs_flow_cmd_dump | |
1428 | }, | |
1429 | { .cmd = OVS_FLOW_CMD_SET, | |
4a92602a | 1430 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e | 1431 | .policy = flow_policy, |
37bdc87b | 1432 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1433 | }, |
1434 | }; | |
1435 | ||
56989f6d | 1436 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1437 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1438 | .name = OVS_FLOW_FAMILY, |
1439 | .version = OVS_FLOW_VERSION, | |
1440 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3a4e0d6a PS |
1441 | .netnsok = true, |
1442 | .parallel_ops = true, | |
0c200ef9 PS |
1443 | .ops = dp_flow_genl_ops, |
1444 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1445 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1446 | .n_mcgrps = 1, | |
489111e5 | 1447 | .module = THIS_MODULE, |
ccb1352e JG |
1448 | }; |
1449 | ||
c3ff8cfe TG |
1450 | static size_t ovs_dp_cmd_msg_size(void) |
1451 | { | |
1452 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1453 | ||
1454 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1455 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1456 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1457 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1458 | |
1459 | return msgsize; | |
1460 | } | |
1461 | ||
8ec609d8 | 1462 | /* Called with ovs_mutex. */ |
ccb1352e | 1463 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1464 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1465 | { |
1466 | struct ovs_header *ovs_header; | |
1467 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1468 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1469 | int err; |
1470 | ||
15e47304 | 1471 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1472 | flags, cmd); |
1473 | if (!ovs_header) | |
1474 | goto error; | |
1475 | ||
1476 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1477 | ||
ccb1352e | 1478 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1479 | if (err) |
1480 | goto nla_put_failure; | |
1481 | ||
1bd7116f | 1482 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1483 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1484 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1485 | goto nla_put_failure; |
1486 | ||
66c7a5ee ND |
1487 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1488 | sizeof(struct ovs_dp_megaflow_stats), | |
1489 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1490 | goto nla_put_failure; |
ccb1352e | 1491 | |
43d4be9c TG |
1492 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1493 | goto nla_put_failure; | |
1494 | ||
053c095a JB |
1495 | genlmsg_end(skb, ovs_header); |
1496 | return 0; | |
ccb1352e JG |
1497 | |
1498 | nla_put_failure: | |
1499 | genlmsg_cancel(skb, ovs_header); | |
1500 | error: | |
1501 | return -EMSGSIZE; | |
1502 | } | |
1503 | ||
263ea090 | 1504 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1505 | { |
551ddc05 | 1506 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1507 | } |
1508 | ||
bb6f9a70 | 1509 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1510 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1511 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1512 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1513 | { | |
1514 | struct datapath *dp; | |
1515 | ||
1516 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1517 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1518 | else { |
1519 | struct vport *vport; | |
1520 | ||
46df7b81 | 1521 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1522 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1523 | } |
1524 | return dp ? dp : ERR_PTR(-ENODEV); | |
1525 | } | |
1526 | ||
44da5ae5 TG |
1527 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1528 | { | |
1529 | struct datapath *dp; | |
1530 | ||
1531 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1532 | if (IS_ERR(dp)) |
44da5ae5 TG |
1533 | return; |
1534 | ||
1535 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1536 | dp->user_features = 0; | |
1537 | } | |
1538 | ||
12eb18f7 | 1539 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c TG |
1540 | { |
1541 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1542 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1543 | } | |
1544 | ||
ccb1352e JG |
1545 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1546 | { | |
1547 | struct nlattr **a = info->attrs; | |
1548 | struct vport_parms parms; | |
1549 | struct sk_buff *reply; | |
1550 | struct datapath *dp; | |
1551 | struct vport *vport; | |
46df7b81 | 1552 | struct ovs_net *ovs_net; |
15eac2a7 | 1553 | int err, i; |
ccb1352e JG |
1554 | |
1555 | err = -EINVAL; | |
1556 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1557 | goto err; | |
1558 | ||
263ea090 | 1559 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1560 | if (!reply) |
1561 | return -ENOMEM; | |
ccb1352e JG |
1562 | |
1563 | err = -ENOMEM; | |
1564 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1565 | if (dp == NULL) | |
6093ae9a | 1566 | goto err_free_reply; |
46df7b81 | 1567 | |
efd7ef1c | 1568 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1569 | |
1570 | /* Allocate table. */ | |
b637e498 PS |
1571 | err = ovs_flow_tbl_init(&dp->table); |
1572 | if (err) | |
ccb1352e JG |
1573 | goto err_free_dp; |
1574 | ||
1c213bd2 | 1575 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1576 | if (!dp->stats_percpu) { |
1577 | err = -ENOMEM; | |
1578 | goto err_destroy_table; | |
1579 | } | |
1580 | ||
6da2ec56 KC |
1581 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, |
1582 | sizeof(struct hlist_head), | |
1583 | GFP_KERNEL); | |
15eac2a7 PS |
1584 | if (!dp->ports) { |
1585 | err = -ENOMEM; | |
1586 | goto err_destroy_percpu; | |
1587 | } | |
1588 | ||
1589 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1590 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1591 | ||
96fbc13d AZ |
1592 | err = ovs_meters_init(dp); |
1593 | if (err) | |
1594 | goto err_destroy_ports_array; | |
1595 | ||
ccb1352e JG |
1596 | /* Set up our datapath device. */ |
1597 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1598 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1599 | parms.options = NULL; | |
1600 | parms.dp = dp; | |
1601 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1602 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1603 | |
43d4be9c TG |
1604 | ovs_dp_change(dp, a); |
1605 | ||
6093ae9a JR |
1606 | /* So far only local changes have been made, now need the lock. */ |
1607 | ovs_lock(); | |
1608 | ||
ccb1352e JG |
1609 | vport = new_vport(&parms); |
1610 | if (IS_ERR(vport)) { | |
1611 | err = PTR_ERR(vport); | |
1612 | if (err == -EBUSY) | |
1613 | err = -EEXIST; | |
1614 | ||
44da5ae5 TG |
1615 | if (err == -EEXIST) { |
1616 | /* An outdated user space instance that does not understand | |
1617 | * the concept of user_features has attempted to create a new | |
1618 | * datapath and is likely to reuse it. Drop all user features. | |
1619 | */ | |
1620 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1621 | ovs_dp_reset_user_features(skb, info); | |
1622 | } | |
1623 | ||
96fbc13d | 1624 | goto err_destroy_meters; |
ccb1352e JG |
1625 | } |
1626 | ||
6093ae9a JR |
1627 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1628 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1629 | BUG_ON(err < 0); | |
ccb1352e | 1630 | |
46df7b81 | 1631 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1632 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1633 | |
1634 | ovs_unlock(); | |
ccb1352e | 1635 | |
2a94fe48 | 1636 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1637 | return 0; |
1638 | ||
96fbc13d | 1639 | err_destroy_meters: |
6093ae9a | 1640 | ovs_unlock(); |
96fbc13d AZ |
1641 | ovs_meters_exit(dp); |
1642 | err_destroy_ports_array: | |
15eac2a7 | 1643 | kfree(dp->ports); |
ccb1352e JG |
1644 | err_destroy_percpu: |
1645 | free_percpu(dp->stats_percpu); | |
1646 | err_destroy_table: | |
9b996e54 | 1647 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1648 | err_free_dp: |
1649 | kfree(dp); | |
6093ae9a JR |
1650 | err_free_reply: |
1651 | kfree_skb(reply); | |
ccb1352e JG |
1652 | err: |
1653 | return err; | |
1654 | } | |
1655 | ||
8e4e1713 | 1656 | /* Called with ovs_mutex. */ |
46df7b81 | 1657 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1658 | { |
15eac2a7 | 1659 | int i; |
ccb1352e | 1660 | |
15eac2a7 PS |
1661 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1662 | struct vport *vport; | |
b67bfe0d | 1663 | struct hlist_node *n; |
15eac2a7 | 1664 | |
b67bfe0d | 1665 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1666 | if (vport->port_no != OVSP_LOCAL) |
1667 | ovs_dp_detach_port(vport); | |
1668 | } | |
ccb1352e | 1669 | |
59a35d60 | 1670 | list_del_rcu(&dp->list_node); |
ccb1352e | 1671 | |
8e4e1713 | 1672 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1673 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1674 | */ |
8e4e1713 | 1675 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1676 | |
e80857cc | 1677 | /* RCU destroy the flow table */ |
ccb1352e | 1678 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1679 | } |
1680 | ||
1681 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1682 | { | |
1683 | struct sk_buff *reply; | |
1684 | struct datapath *dp; | |
1685 | int err; | |
1686 | ||
263ea090 | 1687 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1688 | if (!reply) |
1689 | return -ENOMEM; | |
1690 | ||
8e4e1713 | 1691 | ovs_lock(); |
46df7b81 PS |
1692 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1693 | err = PTR_ERR(dp); | |
1694 | if (IS_ERR(dp)) | |
6093ae9a | 1695 | goto err_unlock_free; |
46df7b81 | 1696 | |
6093ae9a JR |
1697 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1698 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1699 | BUG_ON(err < 0); | |
46df7b81 PS |
1700 | |
1701 | __dp_destroy(dp); | |
8e4e1713 | 1702 | ovs_unlock(); |
ccb1352e | 1703 | |
2a94fe48 | 1704 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1705 | |
1706 | return 0; | |
6093ae9a JR |
1707 | |
1708 | err_unlock_free: | |
8e4e1713 | 1709 | ovs_unlock(); |
6093ae9a | 1710 | kfree_skb(reply); |
8e4e1713 | 1711 | return err; |
ccb1352e JG |
1712 | } |
1713 | ||
1714 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1715 | { | |
1716 | struct sk_buff *reply; | |
1717 | struct datapath *dp; | |
1718 | int err; | |
1719 | ||
263ea090 | 1720 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1721 | if (!reply) |
1722 | return -ENOMEM; | |
1723 | ||
8e4e1713 | 1724 | ovs_lock(); |
46df7b81 | 1725 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1726 | err = PTR_ERR(dp); |
ccb1352e | 1727 | if (IS_ERR(dp)) |
6093ae9a | 1728 | goto err_unlock_free; |
ccb1352e | 1729 | |
43d4be9c TG |
1730 | ovs_dp_change(dp, info->attrs); |
1731 | ||
6093ae9a JR |
1732 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1733 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1734 | BUG_ON(err < 0); | |
ccb1352e | 1735 | |
8e4e1713 | 1736 | ovs_unlock(); |
2a94fe48 | 1737 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1738 | |
1739 | return 0; | |
6093ae9a JR |
1740 | |
1741 | err_unlock_free: | |
8e4e1713 | 1742 | ovs_unlock(); |
6093ae9a | 1743 | kfree_skb(reply); |
8e4e1713 | 1744 | return err; |
ccb1352e JG |
1745 | } |
1746 | ||
1747 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1748 | { | |
1749 | struct sk_buff *reply; | |
1750 | struct datapath *dp; | |
8e4e1713 | 1751 | int err; |
ccb1352e | 1752 | |
263ea090 | 1753 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1754 | if (!reply) |
1755 | return -ENOMEM; | |
1756 | ||
8ec609d8 | 1757 | ovs_lock(); |
46df7b81 | 1758 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1759 | if (IS_ERR(dp)) { |
1760 | err = PTR_ERR(dp); | |
6093ae9a | 1761 | goto err_unlock_free; |
8e4e1713 | 1762 | } |
6093ae9a JR |
1763 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1764 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1765 | BUG_ON(err < 0); | |
8ec609d8 | 1766 | ovs_unlock(); |
ccb1352e JG |
1767 | |
1768 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1769 | |
6093ae9a | 1770 | err_unlock_free: |
8ec609d8 | 1771 | ovs_unlock(); |
6093ae9a | 1772 | kfree_skb(reply); |
8e4e1713 | 1773 | return err; |
ccb1352e JG |
1774 | } |
1775 | ||
1776 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1777 | { | |
46df7b81 | 1778 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1779 | struct datapath *dp; |
1780 | int skip = cb->args[0]; | |
1781 | int i = 0; | |
1782 | ||
8ec609d8 PS |
1783 | ovs_lock(); |
1784 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1785 | if (i >= skip && |
15e47304 | 1786 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e JG |
1787 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
1788 | OVS_DP_CMD_NEW) < 0) | |
1789 | break; | |
1790 | i++; | |
1791 | } | |
8ec609d8 | 1792 | ovs_unlock(); |
ccb1352e JG |
1793 | |
1794 | cb->args[0] = i; | |
1795 | ||
1796 | return skb->len; | |
1797 | } | |
1798 | ||
0c200ef9 PS |
1799 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1800 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1801 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1802 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1803 | }; | |
1804 | ||
48e48a70 | 1805 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1806 | { .cmd = OVS_DP_CMD_NEW, |
4a92602a | 1807 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1808 | .policy = datapath_policy, |
1809 | .doit = ovs_dp_cmd_new | |
1810 | }, | |
1811 | { .cmd = OVS_DP_CMD_DEL, | |
4a92602a | 1812 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1813 | .policy = datapath_policy, |
1814 | .doit = ovs_dp_cmd_del | |
1815 | }, | |
1816 | { .cmd = OVS_DP_CMD_GET, | |
1817 | .flags = 0, /* OK for unprivileged users. */ | |
1818 | .policy = datapath_policy, | |
1819 | .doit = ovs_dp_cmd_get, | |
1820 | .dumpit = ovs_dp_cmd_dump | |
1821 | }, | |
1822 | { .cmd = OVS_DP_CMD_SET, | |
4a92602a | 1823 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1824 | .policy = datapath_policy, |
1825 | .doit = ovs_dp_cmd_set, | |
1826 | }, | |
1827 | }; | |
1828 | ||
56989f6d | 1829 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1830 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1831 | .name = OVS_DATAPATH_FAMILY, |
1832 | .version = OVS_DATAPATH_VERSION, | |
1833 | .maxattr = OVS_DP_ATTR_MAX, | |
3a4e0d6a PS |
1834 | .netnsok = true, |
1835 | .parallel_ops = true, | |
0c200ef9 PS |
1836 | .ops = dp_datapath_genl_ops, |
1837 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1838 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1839 | .n_mcgrps = 1, | |
489111e5 | 1840 | .module = THIS_MODULE, |
ccb1352e JG |
1841 | }; |
1842 | ||
8e4e1713 | 1843 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1844 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 JB |
1845 | struct net *net, u32 portid, u32 seq, |
1846 | u32 flags, u8 cmd) | |
ccb1352e JG |
1847 | { |
1848 | struct ovs_header *ovs_header; | |
1849 | struct ovs_vport_stats vport_stats; | |
1850 | int err; | |
1851 | ||
15e47304 | 1852 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1853 | flags, cmd); |
1854 | if (!ovs_header) | |
1855 | return -EMSGSIZE; | |
1856 | ||
1857 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1858 | ||
028d6a67 DM |
1859 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1860 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1861 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1862 | ovs_vport_name(vport)) || |
1863 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1864 | goto nla_put_failure; |
ccb1352e | 1865 | |
9354d452 JB |
1866 | if (!net_eq(net, dev_net(vport->dev))) { |
1867 | int id = peernet2id_alloc(net, dev_net(vport->dev)); | |
1868 | ||
1869 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1870 | goto nla_put_failure; | |
1871 | } | |
1872 | ||
ccb1352e | 1873 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1874 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1875 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1876 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1877 | goto nla_put_failure; |
ccb1352e | 1878 | |
5cd667b0 AW |
1879 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1880 | goto nla_put_failure; | |
1881 | ||
ccb1352e JG |
1882 | err = ovs_vport_get_options(vport, skb); |
1883 | if (err == -EMSGSIZE) | |
1884 | goto error; | |
1885 | ||
053c095a JB |
1886 | genlmsg_end(skb, ovs_header); |
1887 | return 0; | |
ccb1352e JG |
1888 | |
1889 | nla_put_failure: | |
1890 | err = -EMSGSIZE; | |
1891 | error: | |
1892 | genlmsg_cancel(skb, ovs_header); | |
1893 | return err; | |
1894 | } | |
1895 | ||
6093ae9a JR |
1896 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1897 | { | |
1898 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1899 | } | |
1900 | ||
1901 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
1902 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1903 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
1904 | { |
1905 | struct sk_buff *skb; | |
1906 | int retval; | |
1907 | ||
1908 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
1909 | if (!skb) | |
1910 | return ERR_PTR(-ENOMEM); | |
1911 | ||
9354d452 | 1912 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd); |
a9341512 JG |
1913 | BUG_ON(retval < 0); |
1914 | ||
ccb1352e JG |
1915 | return skb; |
1916 | } | |
1917 | ||
8e4e1713 | 1918 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1919 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1920 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1921 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1922 | { | |
1923 | struct datapath *dp; | |
1924 | struct vport *vport; | |
1925 | ||
9354d452 JB |
1926 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1927 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 1928 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 1929 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1930 | if (!vport) |
1931 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1932 | if (ovs_header->dp_ifindex && |
1933 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1934 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1935 | return vport; |
1936 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1937 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1938 | ||
1939 | if (port_no >= DP_MAX_PORTS) | |
1940 | return ERR_PTR(-EFBIG); | |
1941 | ||
46df7b81 | 1942 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1943 | if (!dp) |
1944 | return ERR_PTR(-ENODEV); | |
1945 | ||
8e4e1713 | 1946 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1947 | if (!vport) |
14408dba | 1948 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1949 | return vport; |
1950 | } else | |
1951 | return ERR_PTR(-EINVAL); | |
9354d452 | 1952 | |
ccb1352e JG |
1953 | } |
1954 | ||
3a927bc7 PA |
1955 | /* Called with ovs_mutex */ |
1956 | static void update_headroom(struct datapath *dp) | |
1957 | { | |
1958 | unsigned dev_headroom, max_headroom = 0; | |
1959 | struct net_device *dev; | |
1960 | struct vport *vport; | |
1961 | int i; | |
1962 | ||
1963 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1964 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1965 | dev = vport->dev; | |
1966 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1967 | if (dev_headroom > max_headroom) | |
1968 | max_headroom = dev_headroom; | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | dp->max_headroom = max_headroom; | |
1973 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1974 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1975 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1976 | } | |
1977 | ||
ccb1352e JG |
1978 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1979 | { | |
1980 | struct nlattr **a = info->attrs; | |
1981 | struct ovs_header *ovs_header = info->userhdr; | |
1982 | struct vport_parms parms; | |
1983 | struct sk_buff *reply; | |
1984 | struct vport *vport; | |
1985 | struct datapath *dp; | |
1986 | u32 port_no; | |
1987 | int err; | |
1988 | ||
ccb1352e JG |
1989 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1990 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 1991 | return -EINVAL; |
9354d452 JB |
1992 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1993 | return -EOPNOTSUPP; | |
6093ae9a JR |
1994 | |
1995 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
1996 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
1997 | if (port_no >= DP_MAX_PORTS) | |
1998 | return -EFBIG; | |
1999 | ||
2000 | reply = ovs_vport_cmd_alloc_info(); | |
2001 | if (!reply) | |
2002 | return -ENOMEM; | |
ccb1352e | 2003 | |
8e4e1713 | 2004 | ovs_lock(); |
62b9c8d0 | 2005 | restart: |
46df7b81 | 2006 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2007 | err = -ENODEV; |
2008 | if (!dp) | |
6093ae9a | 2009 | goto exit_unlock_free; |
ccb1352e | 2010 | |
6093ae9a | 2011 | if (port_no) { |
8e4e1713 | 2012 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2013 | err = -EBUSY; |
2014 | if (vport) | |
6093ae9a | 2015 | goto exit_unlock_free; |
ccb1352e JG |
2016 | } else { |
2017 | for (port_no = 1; ; port_no++) { | |
2018 | if (port_no >= DP_MAX_PORTS) { | |
2019 | err = -EFBIG; | |
6093ae9a | 2020 | goto exit_unlock_free; |
ccb1352e | 2021 | } |
8e4e1713 | 2022 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2023 | if (!vport) |
2024 | break; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2029 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2030 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2031 | parms.dp = dp; | |
2032 | parms.port_no = port_no; | |
5cd667b0 | 2033 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2034 | |
2035 | vport = new_vport(&parms); | |
2036 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2037 | if (IS_ERR(vport)) { |
2038 | if (err == -EAGAIN) | |
2039 | goto restart; | |
6093ae9a | 2040 | goto exit_unlock_free; |
62b9c8d0 | 2041 | } |
ccb1352e | 2042 | |
9354d452 JB |
2043 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2044 | info->snd_portid, info->snd_seq, 0, | |
2045 | OVS_VPORT_CMD_NEW); | |
3a927bc7 PA |
2046 | |
2047 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2048 | update_headroom(dp); | |
2049 | else | |
2050 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2051 | ||
6093ae9a JR |
2052 | BUG_ON(err < 0); |
2053 | ovs_unlock(); | |
ed661185 | 2054 | |
2a94fe48 | 2055 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2056 | return 0; |
ccb1352e | 2057 | |
6093ae9a | 2058 | exit_unlock_free: |
8e4e1713 | 2059 | ovs_unlock(); |
6093ae9a | 2060 | kfree_skb(reply); |
ccb1352e JG |
2061 | return err; |
2062 | } | |
2063 | ||
2064 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2065 | { | |
2066 | struct nlattr **a = info->attrs; | |
2067 | struct sk_buff *reply; | |
2068 | struct vport *vport; | |
2069 | int err; | |
2070 | ||
6093ae9a JR |
2071 | reply = ovs_vport_cmd_alloc_info(); |
2072 | if (!reply) | |
2073 | return -ENOMEM; | |
2074 | ||
8e4e1713 | 2075 | ovs_lock(); |
46df7b81 | 2076 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2077 | err = PTR_ERR(vport); |
2078 | if (IS_ERR(vport)) | |
6093ae9a | 2079 | goto exit_unlock_free; |
ccb1352e | 2080 | |
ccb1352e | 2081 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2082 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2083 | err = -EINVAL; |
6093ae9a | 2084 | goto exit_unlock_free; |
a9341512 JG |
2085 | } |
2086 | ||
f44f3408 | 2087 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2088 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2089 | if (err) |
6093ae9a | 2090 | goto exit_unlock_free; |
f44f3408 | 2091 | } |
a9341512 | 2092 | |
5cd667b0 AW |
2093 | |
2094 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2095 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2096 | ||
2097 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2098 | if (err) | |
2099 | goto exit_unlock_free; | |
2100 | } | |
ccb1352e | 2101 | |
9354d452 JB |
2102 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2103 | info->snd_portid, info->snd_seq, 0, | |
2104 | OVS_VPORT_CMD_NEW); | |
a9341512 | 2105 | BUG_ON(err < 0); |
ccb1352e | 2106 | |
8e4e1713 | 2107 | ovs_unlock(); |
2a94fe48 | 2108 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2109 | return 0; |
ccb1352e | 2110 | |
6093ae9a | 2111 | exit_unlock_free: |
8e4e1713 | 2112 | ovs_unlock(); |
6093ae9a | 2113 | kfree_skb(reply); |
ccb1352e JG |
2114 | return err; |
2115 | } | |
2116 | ||
2117 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2118 | { | |
3a927bc7 | 2119 | bool must_update_headroom = false; |
ccb1352e JG |
2120 | struct nlattr **a = info->attrs; |
2121 | struct sk_buff *reply; | |
3a927bc7 | 2122 | struct datapath *dp; |
ccb1352e JG |
2123 | struct vport *vport; |
2124 | int err; | |
2125 | ||
6093ae9a JR |
2126 | reply = ovs_vport_cmd_alloc_info(); |
2127 | if (!reply) | |
2128 | return -ENOMEM; | |
2129 | ||
8e4e1713 | 2130 | ovs_lock(); |
46df7b81 | 2131 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2132 | err = PTR_ERR(vport); |
2133 | if (IS_ERR(vport)) | |
6093ae9a | 2134 | goto exit_unlock_free; |
ccb1352e JG |
2135 | |
2136 | if (vport->port_no == OVSP_LOCAL) { | |
2137 | err = -EINVAL; | |
6093ae9a | 2138 | goto exit_unlock_free; |
ccb1352e JG |
2139 | } |
2140 | ||
9354d452 JB |
2141 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2142 | info->snd_portid, info->snd_seq, 0, | |
2143 | OVS_VPORT_CMD_DEL); | |
6093ae9a | 2144 | BUG_ON(err < 0); |
3a927bc7 PA |
2145 | |
2146 | /* the vport deletion may trigger dp headroom update */ | |
2147 | dp = vport->dp; | |
2148 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2149 | must_update_headroom = true; | |
2150 | netdev_reset_rx_headroom(vport->dev); | |
ccb1352e | 2151 | ovs_dp_detach_port(vport); |
3a927bc7 PA |
2152 | |
2153 | if (must_update_headroom) | |
2154 | update_headroom(dp); | |
6093ae9a | 2155 | ovs_unlock(); |
ccb1352e | 2156 | |
2a94fe48 | 2157 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2158 | return 0; |
ccb1352e | 2159 | |
6093ae9a | 2160 | exit_unlock_free: |
8e4e1713 | 2161 | ovs_unlock(); |
6093ae9a | 2162 | kfree_skb(reply); |
ccb1352e JG |
2163 | return err; |
2164 | } | |
2165 | ||
2166 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2167 | { | |
2168 | struct nlattr **a = info->attrs; | |
2169 | struct ovs_header *ovs_header = info->userhdr; | |
2170 | struct sk_buff *reply; | |
2171 | struct vport *vport; | |
2172 | int err; | |
2173 | ||
6093ae9a JR |
2174 | reply = ovs_vport_cmd_alloc_info(); |
2175 | if (!reply) | |
2176 | return -ENOMEM; | |
2177 | ||
ccb1352e | 2178 | rcu_read_lock(); |
46df7b81 | 2179 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2180 | err = PTR_ERR(vport); |
2181 | if (IS_ERR(vport)) | |
6093ae9a | 2182 | goto exit_unlock_free; |
9354d452 JB |
2183 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2184 | info->snd_portid, info->snd_seq, 0, | |
2185 | OVS_VPORT_CMD_NEW); | |
6093ae9a | 2186 | BUG_ON(err < 0); |
ccb1352e JG |
2187 | rcu_read_unlock(); |
2188 | ||
2189 | return genlmsg_reply(reply, info); | |
2190 | ||
6093ae9a | 2191 | exit_unlock_free: |
ccb1352e | 2192 | rcu_read_unlock(); |
6093ae9a | 2193 | kfree_skb(reply); |
ccb1352e JG |
2194 | return err; |
2195 | } | |
2196 | ||
2197 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2198 | { | |
2199 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2200 | struct datapath *dp; | |
15eac2a7 PS |
2201 | int bucket = cb->args[0], skip = cb->args[1]; |
2202 | int i, j = 0; | |
ccb1352e | 2203 | |
42ee19e2 | 2204 | rcu_read_lock(); |
cc3a5ae6 | 2205 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2206 | if (!dp) { |
2207 | rcu_read_unlock(); | |
ccb1352e | 2208 | return -ENODEV; |
42ee19e2 | 2209 | } |
15eac2a7 | 2210 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2211 | struct vport *vport; |
15eac2a7 PS |
2212 | |
2213 | j = 0; | |
b67bfe0d | 2214 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2215 | if (j >= skip && |
2216 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2217 | sock_net(skb->sk), |
15e47304 | 2218 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2219 | cb->nlh->nlmsg_seq, |
2220 | NLM_F_MULTI, | |
2221 | OVS_VPORT_CMD_NEW) < 0) | |
2222 | goto out; | |
2223 | ||
2224 | j++; | |
2225 | } | |
2226 | skip = 0; | |
ccb1352e | 2227 | } |
15eac2a7 | 2228 | out: |
ccb1352e JG |
2229 | rcu_read_unlock(); |
2230 | ||
15eac2a7 PS |
2231 | cb->args[0] = i; |
2232 | cb->args[1] = j; | |
ccb1352e | 2233 | |
15eac2a7 | 2234 | return skb->len; |
ccb1352e JG |
2235 | } |
2236 | ||
0c200ef9 PS |
2237 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2238 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2239 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2240 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2241 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2242 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2243 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
9354d452 JB |
2244 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2245 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2246 | }; |
2247 | ||
48e48a70 | 2248 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2249 | { .cmd = OVS_VPORT_CMD_NEW, |
4a92602a | 2250 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2251 | .policy = vport_policy, |
2252 | .doit = ovs_vport_cmd_new | |
2253 | }, | |
2254 | { .cmd = OVS_VPORT_CMD_DEL, | |
4a92602a | 2255 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2256 | .policy = vport_policy, |
2257 | .doit = ovs_vport_cmd_del | |
2258 | }, | |
2259 | { .cmd = OVS_VPORT_CMD_GET, | |
2260 | .flags = 0, /* OK for unprivileged users. */ | |
2261 | .policy = vport_policy, | |
2262 | .doit = ovs_vport_cmd_get, | |
2263 | .dumpit = ovs_vport_cmd_dump | |
2264 | }, | |
2265 | { .cmd = OVS_VPORT_CMD_SET, | |
4a92602a | 2266 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2267 | .policy = vport_policy, |
2268 | .doit = ovs_vport_cmd_set, | |
2269 | }, | |
2270 | }; | |
2271 | ||
56989f6d | 2272 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2273 | .hdrsize = sizeof(struct ovs_header), |
2274 | .name = OVS_VPORT_FAMILY, | |
2275 | .version = OVS_VPORT_VERSION, | |
2276 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2277 | .netnsok = true, | |
2278 | .parallel_ops = true, | |
2279 | .ops = dp_vport_genl_ops, | |
2280 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2281 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2282 | .n_mcgrps = 1, | |
489111e5 | 2283 | .module = THIS_MODULE, |
ccb1352e JG |
2284 | }; |
2285 | ||
0c200ef9 PS |
2286 | static struct genl_family * const dp_genl_families[] = { |
2287 | &dp_datapath_genl_family, | |
2288 | &dp_vport_genl_family, | |
2289 | &dp_flow_genl_family, | |
2290 | &dp_packet_genl_family, | |
96fbc13d | 2291 | &dp_meter_genl_family, |
11efd5cb YHW |
2292 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2293 | &dp_ct_limit_genl_family, | |
2294 | #endif | |
ccb1352e JG |
2295 | }; |
2296 | ||
2297 | static void dp_unregister_genl(int n_families) | |
2298 | { | |
2299 | int i; | |
2300 | ||
2301 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2302 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2303 | } |
2304 | ||
56989f6d | 2305 | static int __init dp_register_genl(void) |
ccb1352e | 2306 | { |
ccb1352e JG |
2307 | int err; |
2308 | int i; | |
2309 | ||
ccb1352e | 2310 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2311 | |
0c200ef9 | 2312 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2313 | if (err) |
2314 | goto error; | |
ccb1352e JG |
2315 | } |
2316 | ||
2317 | return 0; | |
2318 | ||
2319 | error: | |
0c200ef9 | 2320 | dp_unregister_genl(i); |
ccb1352e JG |
2321 | return err; |
2322 | } | |
2323 | ||
46df7b81 PS |
2324 | static int __net_init ovs_init_net(struct net *net) |
2325 | { | |
2326 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2327 | ||
2328 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2329 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
11efd5cb | 2330 | return ovs_ct_init(net); |
46df7b81 PS |
2331 | } |
2332 | ||
7b4577a9 PS |
2333 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2334 | struct list_head *head) | |
46df7b81 | 2335 | { |
8e4e1713 | 2336 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2337 | struct datapath *dp; |
2338 | ||
2339 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2340 | int i; | |
2341 | ||
2342 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2343 | struct vport *vport; | |
2344 | ||
2345 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2346 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2347 | continue; | |
2348 | ||
be4ace6e | 2349 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2350 | list_add(&vport->detach_list, head); |
2351 | } | |
2352 | } | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2357 | { | |
2358 | struct datapath *dp, *dp_next; | |
2359 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2360 | struct vport *vport, *vport_next; | |
2361 | struct net *net; | |
2362 | LIST_HEAD(head); | |
46df7b81 | 2363 | |
c2ac6673 | 2364 | ovs_ct_exit(dnet); |
8e4e1713 | 2365 | ovs_lock(); |
46df7b81 PS |
2366 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2367 | __dp_destroy(dp); | |
7b4577a9 | 2368 | |
f0b07bb1 | 2369 | down_read(&net_rwsem); |
7b4577a9 PS |
2370 | for_each_net(net) |
2371 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2372 | up_read(&net_rwsem); |
7b4577a9 PS |
2373 | |
2374 | /* Detach all vports from given namespace. */ | |
2375 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2376 | list_del(&vport->detach_list); | |
2377 | ovs_dp_detach_port(vport); | |
2378 | } | |
2379 | ||
8e4e1713 PS |
2380 | ovs_unlock(); |
2381 | ||
2382 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2383 | } |
2384 | ||
2385 | static struct pernet_operations ovs_net_ops = { | |
2386 | .init = ovs_init_net, | |
2387 | .exit = ovs_exit_net, | |
2388 | .id = &ovs_net_id, | |
2389 | .size = sizeof(struct ovs_net), | |
2390 | }; | |
2391 | ||
ccb1352e JG |
2392 | static int __init dp_init(void) |
2393 | { | |
ccb1352e JG |
2394 | int err; |
2395 | ||
3523b29b | 2396 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2397 | |
2398 | pr_info("Open vSwitch switching datapath\n"); | |
2399 | ||
971427f3 | 2400 | err = action_fifos_init(); |
ccb1352e JG |
2401 | if (err) |
2402 | goto error; | |
2403 | ||
971427f3 AZ |
2404 | err = ovs_internal_dev_rtnl_link_register(); |
2405 | if (err) | |
2406 | goto error_action_fifos_exit; | |
2407 | ||
5b9e7e16 JP |
2408 | err = ovs_flow_init(); |
2409 | if (err) | |
2410 | goto error_unreg_rtnl_link; | |
2411 | ||
ccb1352e JG |
2412 | err = ovs_vport_init(); |
2413 | if (err) | |
2414 | goto error_flow_exit; | |
2415 | ||
46df7b81 | 2416 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2417 | if (err) |
2418 | goto error_vport_exit; | |
2419 | ||
46df7b81 PS |
2420 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2421 | if (err) | |
2422 | goto error_netns_exit; | |
2423 | ||
62b9c8d0 TG |
2424 | err = ovs_netdev_init(); |
2425 | if (err) | |
2426 | goto error_unreg_notifier; | |
2427 | ||
ccb1352e JG |
2428 | err = dp_register_genl(); |
2429 | if (err < 0) | |
62b9c8d0 | 2430 | goto error_unreg_netdev; |
ccb1352e | 2431 | |
ccb1352e JG |
2432 | return 0; |
2433 | ||
62b9c8d0 TG |
2434 | error_unreg_netdev: |
2435 | ovs_netdev_exit(); | |
ccb1352e JG |
2436 | error_unreg_notifier: |
2437 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2438 | error_netns_exit: |
2439 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2440 | error_vport_exit: |
2441 | ovs_vport_exit(); | |
2442 | error_flow_exit: | |
2443 | ovs_flow_exit(); | |
5b9e7e16 JP |
2444 | error_unreg_rtnl_link: |
2445 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2446 | error_action_fifos_exit: |
2447 | action_fifos_exit(); | |
ccb1352e JG |
2448 | error: |
2449 | return err; | |
2450 | } | |
2451 | ||
2452 | static void dp_cleanup(void) | |
2453 | { | |
ccb1352e | 2454 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2455 | ovs_netdev_exit(); |
ccb1352e | 2456 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2457 | unregister_pernet_device(&ovs_net_ops); |
2458 | rcu_barrier(); | |
ccb1352e JG |
2459 | ovs_vport_exit(); |
2460 | ovs_flow_exit(); | |
5b9e7e16 | 2461 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2462 | action_fifos_exit(); |
ccb1352e JG |
2463 | } |
2464 | ||
2465 | module_init(dp_init); | |
2466 | module_exit(dp_cleanup); | |
2467 | ||
2468 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2469 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2470 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2471 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2472 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2473 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2474 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2475 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |