Commit | Line | Data |
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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ccb1352e | 2 | /* |
ad552007 | 3 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/if_arp.h> | |
11 | #include <linux/if_vlan.h> | |
12 | #include <linux/in.h> | |
13 | #include <linux/ip.h> | |
14 | #include <linux/jhash.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/genetlink.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/percpu.h> | |
23 | #include <linux/rcupdate.h> | |
24 | #include <linux/tcp.h> | |
25 | #include <linux/udp.h> | |
ccb1352e JG |
26 | #include <linux/ethtool.h> |
27 | #include <linux/wait.h> | |
ccb1352e JG |
28 | #include <asm/div64.h> |
29 | #include <linux/highmem.h> | |
30 | #include <linux/netfilter_bridge.h> | |
31 | #include <linux/netfilter_ipv4.h> | |
32 | #include <linux/inetdevice.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/openvswitch.h> | |
35 | #include <linux/rculist.h> | |
36 | #include <linux/dmi.h> | |
ccb1352e | 37 | #include <net/genetlink.h> |
46df7b81 PS |
38 | #include <net/net_namespace.h> |
39 | #include <net/netns/generic.h> | |
ccb1352e JG |
40 | |
41 | #include "datapath.h" | |
42 | #include "flow.h" | |
e80857cc | 43 | #include "flow_table.h" |
e6445719 | 44 | #include "flow_netlink.h" |
96fbc13d | 45 | #include "meter.h" |
ccb1352e | 46 | #include "vport-internal_dev.h" |
cff63a52 | 47 | #include "vport-netdev.h" |
ccb1352e | 48 | |
c7d03a00 | 49 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 50 | |
0c200ef9 PS |
51 | static struct genl_family dp_packet_genl_family; |
52 | static struct genl_family dp_flow_genl_family; | |
53 | static struct genl_family dp_datapath_genl_family; | |
54 | ||
74ed7ab9 JS |
55 | static const struct nla_policy flow_policy[]; |
56 | ||
48e48a70 | 57 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
58 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
59 | }; |
60 | ||
48e48a70 | 61 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
62 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
63 | }; |
64 | ||
48e48a70 | 65 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
66 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
67 | }; |
68 | ||
fb5d1e9e JR |
69 | /* Check if need to build a reply message. |
70 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
71 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
72 | unsigned int group) | |
fb5d1e9e JR |
73 | { |
74 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 75 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
76 | } |
77 | ||
68eb5503 | 78 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 79 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 80 | { |
92c14d9b | 81 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
82 | } |
83 | ||
ccb1352e JG |
84 | /** |
85 | * DOC: Locking: | |
86 | * | |
8e4e1713 PS |
87 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
88 | * operations on vports, etc.), Writes to other state (flow table | |
89 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
90 | * by ovs_lock. | |
ccb1352e JG |
91 | * |
92 | * Reads are protected by RCU. | |
93 | * | |
94 | * There are a few special cases (mostly stats) that have their own | |
95 | * synchronization but they nest under all of above and don't interact with | |
96 | * each other. | |
8e4e1713 PS |
97 | * |
98 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
99 | */ |
100 | ||
8e4e1713 PS |
101 | static DEFINE_MUTEX(ovs_mutex); |
102 | ||
103 | void ovs_lock(void) | |
104 | { | |
105 | mutex_lock(&ovs_mutex); | |
106 | } | |
107 | ||
108 | void ovs_unlock(void) | |
109 | { | |
110 | mutex_unlock(&ovs_mutex); | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_LOCKDEP | |
114 | int lockdep_ovsl_is_held(void) | |
115 | { | |
116 | if (debug_locks) | |
117 | return lockdep_is_held(&ovs_mutex); | |
118 | else | |
119 | return 1; | |
120 | } | |
121 | #endif | |
122 | ||
ccb1352e | 123 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 124 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 125 | const struct sw_flow_key *, |
f2a4d086 WT |
126 | const struct dp_upcall_info *, |
127 | uint32_t cutlen); | |
8055a89c | 128 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 129 | const struct sw_flow_key *, |
f2a4d086 WT |
130 | const struct dp_upcall_info *, |
131 | uint32_t cutlen); | |
ccb1352e | 132 | |
8e4e1713 | 133 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 134 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 135 | { |
8e4e1713 | 136 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 137 | return ovs_vport_name(vport); |
ccb1352e JG |
138 | } |
139 | ||
12eb18f7 | 140 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
141 | { |
142 | struct vport *local; | |
143 | int ifindex; | |
144 | ||
145 | rcu_read_lock(); | |
146 | ||
15eac2a7 | 147 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 148 | if (local) |
be4ace6e | 149 | ifindex = local->dev->ifindex; |
ccb1352e JG |
150 | else |
151 | ifindex = 0; | |
152 | ||
153 | rcu_read_unlock(); | |
154 | ||
155 | return ifindex; | |
156 | } | |
157 | ||
158 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
159 | { | |
160 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
161 | ||
9b996e54 | 162 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 163 | free_percpu(dp->stats_percpu); |
15eac2a7 | 164 | kfree(dp->ports); |
96fbc13d | 165 | ovs_meters_exit(dp); |
ccb1352e JG |
166 | kfree(dp); |
167 | } | |
168 | ||
15eac2a7 PS |
169 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
170 | u16 port_no) | |
171 | { | |
172 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
173 | } | |
174 | ||
bb6f9a70 | 175 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
176 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
177 | { | |
178 | struct vport *vport; | |
15eac2a7 PS |
179 | struct hlist_head *head; |
180 | ||
181 | head = vport_hash_bucket(dp, port_no); | |
b67bfe0d | 182 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
15eac2a7 PS |
183 | if (vport->port_no == port_no) |
184 | return vport; | |
185 | } | |
186 | return NULL; | |
187 | } | |
188 | ||
8e4e1713 | 189 | /* Called with ovs_mutex. */ |
ccb1352e JG |
190 | static struct vport *new_vport(const struct vport_parms *parms) |
191 | { | |
192 | struct vport *vport; | |
193 | ||
194 | vport = ovs_vport_add(parms); | |
195 | if (!IS_ERR(vport)) { | |
196 | struct datapath *dp = parms->dp; | |
15eac2a7 | 197 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 198 | |
15eac2a7 | 199 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 200 | } |
ccb1352e JG |
201 | return vport; |
202 | } | |
203 | ||
ccb1352e JG |
204 | void ovs_dp_detach_port(struct vport *p) |
205 | { | |
8e4e1713 | 206 | ASSERT_OVSL(); |
ccb1352e JG |
207 | |
208 | /* First drop references to device. */ | |
15eac2a7 | 209 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
210 | |
211 | /* Then destroy it. */ | |
212 | ovs_vport_del(p); | |
213 | } | |
214 | ||
215 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 216 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 217 | { |
83c8df26 | 218 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
219 | struct datapath *dp = p->dp; |
220 | struct sw_flow *flow; | |
d98612b8 | 221 | struct sw_flow_actions *sf_acts; |
ccb1352e | 222 | struct dp_stats_percpu *stats; |
ccb1352e | 223 | u64 *stats_counter; |
1bd7116f | 224 | u32 n_mask_hit; |
aa733660 | 225 | int error; |
ccb1352e | 226 | |
404f2f10 | 227 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 228 | |
ccb1352e | 229 | /* Look up flow. */ |
04b7d136 TZ |
230 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
231 | &n_mask_hit); | |
ccb1352e JG |
232 | if (unlikely(!flow)) { |
233 | struct dp_upcall_info upcall; | |
234 | ||
ccea7445 | 235 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 236 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 237 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 238 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 239 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
240 | if (unlikely(error)) |
241 | kfree_skb(skb); | |
242 | else | |
243 | consume_skb(skb); | |
ccb1352e JG |
244 | stats_counter = &stats->n_missed; |
245 | goto out; | |
246 | } | |
247 | ||
d98612b8 LJ |
248 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
249 | sf_acts = rcu_dereference(flow->sf_acts); | |
aa733660 YS |
250 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
251 | if (unlikely(error)) | |
252 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
253 | ovs_dp_name(dp), error); | |
ccb1352e | 254 | |
e298e505 | 255 | stats_counter = &stats->n_hit; |
ccb1352e JG |
256 | |
257 | out: | |
258 | /* Update datapath statistics. */ | |
df9d9fdf | 259 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 260 | (*stats_counter)++; |
1bd7116f | 261 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 262 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
263 | } |
264 | ||
ccb1352e | 265 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 266 | const struct sw_flow_key *key, |
f2a4d086 WT |
267 | const struct dp_upcall_info *upcall_info, |
268 | uint32_t cutlen) | |
ccb1352e JG |
269 | { |
270 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
271 | int err; |
272 | ||
15e47304 | 273 | if (upcall_info->portid == 0) { |
ccb1352e JG |
274 | err = -ENOTCONN; |
275 | goto err; | |
276 | } | |
277 | ||
ccb1352e | 278 | if (!skb_is_gso(skb)) |
f2a4d086 | 279 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 280 | else |
f2a4d086 | 281 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
282 | if (err) |
283 | goto err; | |
284 | ||
285 | return 0; | |
286 | ||
287 | err: | |
404f2f10 | 288 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 289 | |
df9d9fdf | 290 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 291 | stats->n_lost++; |
df9d9fdf | 292 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
293 | |
294 | return err; | |
295 | } | |
296 | ||
8055a89c | 297 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 298 | const struct sw_flow_key *key, |
f2a4d086 WT |
299 | const struct dp_upcall_info *upcall_info, |
300 | uint32_t cutlen) | |
ccb1352e | 301 | { |
2734166e | 302 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 303 | struct sw_flow_key later_key; |
ccb1352e JG |
304 | struct sk_buff *segs, *nskb; |
305 | int err; | |
306 | ||
9207f9d4 | 307 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_SGO_CB_OFFSET); |
09c5e605 | 308 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
309 | if (IS_ERR(segs)) |
310 | return PTR_ERR(segs); | |
330966e5 FW |
311 | if (segs == NULL) |
312 | return -EINVAL; | |
ccb1352e | 313 | |
0c19f846 WB |
314 | if (gso_type & SKB_GSO_UDP) { |
315 | /* The initial flow key extracted by ovs_flow_key_extract() | |
316 | * in this case is for a first fragment, so we need to | |
317 | * properly mark later fragments. | |
318 | */ | |
319 | later_key = *key; | |
320 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
321 | } | |
322 | ||
ccb1352e JG |
323 | /* Queue all of the segments. */ |
324 | skb = segs; | |
325 | do { | |
0c19f846 WB |
326 | if (gso_type & SKB_GSO_UDP && skb != segs) |
327 | key = &later_key; | |
328 | ||
f2a4d086 | 329 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
330 | if (err) |
331 | break; | |
332 | ||
ccb1352e JG |
333 | } while ((skb = skb->next)); |
334 | ||
335 | /* Free all of the segments. */ | |
336 | skb = segs; | |
337 | do { | |
338 | nskb = skb->next; | |
339 | if (err) | |
340 | kfree_skb(skb); | |
341 | else | |
342 | consume_skb(skb); | |
343 | } while ((skb = nskb)); | |
344 | return err; | |
345 | } | |
346 | ||
8f0aad6f | 347 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 348 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
349 | { |
350 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 351 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 WT |
352 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
353 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
c3ff8cfe TG |
354 | |
355 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
356 | if (upcall_info->userdata) |
357 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
358 | ||
359 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
360 | if (upcall_info->egress_tun_info) | |
361 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 362 | |
ccea7445 NM |
363 | /* OVS_PACKET_ATTR_ACTIONS */ |
364 | if (upcall_info->actions_len) | |
494bea39 | 365 | size += nla_total_size(actions_attrlen); |
ccea7445 | 366 | |
7f8a436e JS |
367 | /* OVS_PACKET_ATTR_MRU */ |
368 | if (upcall_info->mru) | |
369 | size += nla_total_size(sizeof(upcall_info->mru)); | |
370 | ||
c3ff8cfe TG |
371 | return size; |
372 | } | |
373 | ||
7f8a436e JS |
374 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
375 | { | |
376 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
377 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
378 | ||
379 | if (plen > 0) | |
b080db58 | 380 | skb_put_zero(skb, plen); |
7f8a436e JS |
381 | } |
382 | } | |
383 | ||
8055a89c | 384 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 385 | const struct sw_flow_key *key, |
f2a4d086 WT |
386 | const struct dp_upcall_info *upcall_info, |
387 | uint32_t cutlen) | |
ccb1352e JG |
388 | { |
389 | struct ovs_header *upcall; | |
390 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 391 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 392 | struct nlattr *nla; |
795449d8 | 393 | size_t len; |
bda56f14 | 394 | unsigned int hlen; |
8055a89c TG |
395 | int err, dp_ifindex; |
396 | ||
397 | dp_ifindex = get_dpifindex(dp); | |
398 | if (!dp_ifindex) | |
399 | return -ENODEV; | |
ccb1352e | 400 | |
df8a39de | 401 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
402 | nskb = skb_clone(skb, GFP_ATOMIC); |
403 | if (!nskb) | |
404 | return -ENOMEM; | |
405 | ||
5968250c | 406 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 407 | if (!nskb) |
ccb1352e JG |
408 | return -ENOMEM; |
409 | ||
ccb1352e JG |
410 | skb = nskb; |
411 | } | |
412 | ||
413 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
414 | err = -EFBIG; | |
415 | goto out; | |
416 | } | |
417 | ||
bda56f14 TG |
418 | /* Complete checksum if needed */ |
419 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 420 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
421 | goto out; |
422 | ||
423 | /* Older versions of OVS user space enforce alignment of the last | |
424 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
425 | * padding logic. Only perform zerocopy if padding is not required. | |
426 | */ | |
427 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
428 | hlen = skb_zerocopy_headlen(skb); | |
429 | else | |
430 | hlen = skb->len; | |
431 | ||
494bea39 LZ |
432 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
433 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 434 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
435 | if (!user_skb) { |
436 | err = -ENOMEM; | |
437 | goto out; | |
438 | } | |
439 | ||
440 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
441 | 0, upcall_info->cmd); | |
6f19893b KL |
442 | if (!upcall) { |
443 | err = -EINVAL; | |
444 | goto out; | |
445 | } | |
ccb1352e JG |
446 | upcall->dp_ifindex = dp_ifindex; |
447 | ||
5b4237bb | 448 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
449 | if (err) |
450 | goto out; | |
ccb1352e JG |
451 | |
452 | if (upcall_info->userdata) | |
4490108b BP |
453 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
454 | nla_len(upcall_info->userdata), | |
455 | nla_data(upcall_info->userdata)); | |
ccb1352e | 456 | |
8f0aad6f | 457 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
458 | nla = nla_nest_start_noflag(user_skb, |
459 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
460 | if (!nla) { |
461 | err = -EMSGSIZE; | |
462 | goto out; | |
463 | } | |
fc4099f1 PS |
464 | err = ovs_nla_put_tunnel_info(user_skb, |
465 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
466 | if (err) |
467 | goto out; | |
468 | ||
8f0aad6f WZ |
469 | nla_nest_end(user_skb, nla); |
470 | } | |
471 | ||
ccea7445 | 472 | if (upcall_info->actions_len) { |
ae0be8de | 473 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
474 | if (!nla) { |
475 | err = -EMSGSIZE; | |
476 | goto out; | |
477 | } | |
ccea7445 NM |
478 | err = ovs_nla_put_actions(upcall_info->actions, |
479 | upcall_info->actions_len, | |
480 | user_skb); | |
481 | if (!err) | |
482 | nla_nest_end(user_skb, nla); | |
483 | else | |
484 | nla_nest_cancel(user_skb, nla); | |
485 | } | |
486 | ||
7f8a436e JS |
487 | /* Add OVS_PACKET_ATTR_MRU */ |
488 | if (upcall_info->mru) { | |
489 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
490 | upcall_info->mru)) { | |
491 | err = -ENOBUFS; | |
492 | goto out; | |
493 | } | |
494 | pad_packet(dp, user_skb); | |
495 | } | |
496 | ||
b95e5928 WT |
497 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
498 | if (cutlen > 0) { | |
499 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
500 | skb->len)) { | |
501 | err = -ENOBUFS; | |
502 | goto out; | |
503 | } | |
504 | pad_packet(dp, user_skb); | |
505 | } | |
506 | ||
bda56f14 TG |
507 | /* Only reserve room for attribute header, packet data is added |
508 | * in skb_zerocopy() */ | |
509 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
510 | err = -ENOBUFS; | |
511 | goto out; | |
512 | } | |
f2a4d086 | 513 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 514 | |
f2a4d086 | 515 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
516 | if (err) |
517 | goto out; | |
ccb1352e | 518 | |
aea0bb4f | 519 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 520 | pad_packet(dp, user_skb); |
aea0bb4f | 521 | |
bda56f14 | 522 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 523 | |
bda56f14 | 524 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 525 | user_skb = NULL; |
ccb1352e | 526 | out: |
36d5fe6a ZK |
527 | if (err) |
528 | skb_tx_error(skb); | |
4ee45ea0 | 529 | kfree_skb(user_skb); |
ccb1352e JG |
530 | kfree_skb(nskb); |
531 | return err; | |
532 | } | |
533 | ||
ccb1352e JG |
534 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
535 | { | |
536 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 537 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
538 | struct nlattr **a = info->attrs; |
539 | struct sw_flow_actions *acts; | |
540 | struct sk_buff *packet; | |
541 | struct sw_flow *flow; | |
d98612b8 | 542 | struct sw_flow_actions *sf_acts; |
ccb1352e | 543 | struct datapath *dp; |
83c8df26 | 544 | struct vport *input_vport; |
7f8a436e | 545 | u16 mru = 0; |
ccb1352e JG |
546 | int len; |
547 | int err; | |
1ba39804 | 548 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
549 | |
550 | err = -EINVAL; | |
551 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 552 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
553 | goto err; |
554 | ||
555 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
556 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
557 | err = -ENOMEM; | |
558 | if (!packet) | |
559 | goto err; | |
560 | skb_reserve(packet, NET_IP_ALIGN); | |
561 | ||
32686a9d | 562 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 563 | |
7f8a436e JS |
564 | /* Set packet's mru */ |
565 | if (a[OVS_PACKET_ATTR_MRU]) { | |
566 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
567 | packet->ignore_df = 1; | |
568 | } | |
569 | OVS_CB(packet)->mru = mru; | |
570 | ||
ccb1352e | 571 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 572 | flow = ovs_flow_alloc(); |
ccb1352e JG |
573 | err = PTR_ERR(flow); |
574 | if (IS_ERR(flow)) | |
575 | goto err_kfree_skb; | |
576 | ||
c2ac6673 JS |
577 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
578 | packet, &flow->key, log); | |
ccb1352e JG |
579 | if (err) |
580 | goto err_flow_free; | |
581 | ||
7f8a436e | 582 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 583 | &flow->key, &acts, log); |
74f84a57 PS |
584 | if (err) |
585 | goto err_flow_free; | |
ccb1352e | 586 | |
f5796684 | 587 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 588 | packet->priority = flow->key.phy.priority; |
39c7caeb | 589 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
590 | |
591 | rcu_read_lock(); | |
7f8a436e | 592 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
593 | err = -ENODEV; |
594 | if (!dp) | |
595 | goto err_unlock; | |
596 | ||
83c8df26 PS |
597 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
598 | if (!input_vport) | |
599 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
600 | ||
601 | if (!input_vport) | |
602 | goto err_unlock; | |
603 | ||
7f8a436e | 604 | packet->dev = input_vport->dev; |
83c8df26 | 605 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 606 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 607 | |
ccb1352e | 608 | local_bh_disable(); |
d98612b8 | 609 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
610 | local_bh_enable(); |
611 | rcu_read_unlock(); | |
612 | ||
03f0d916 | 613 | ovs_flow_free(flow, false); |
ccb1352e JG |
614 | return err; |
615 | ||
616 | err_unlock: | |
617 | rcu_read_unlock(); | |
618 | err_flow_free: | |
03f0d916 | 619 | ovs_flow_free(flow, false); |
ccb1352e JG |
620 | err_kfree_skb: |
621 | kfree_skb(packet); | |
622 | err: | |
623 | return err; | |
624 | } | |
625 | ||
626 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 627 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
628 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
629 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 630 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 631 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
ccb1352e JG |
632 | }; |
633 | ||
4534de83 | 634 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 635 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 636 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 637 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
638 | .doit = ovs_packet_cmd_execute |
639 | } | |
640 | }; | |
641 | ||
56989f6d | 642 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
643 | .hdrsize = sizeof(struct ovs_header), |
644 | .name = OVS_PACKET_FAMILY, | |
645 | .version = OVS_PACKET_VERSION, | |
646 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 647 | .policy = packet_policy, |
0c200ef9 PS |
648 | .netnsok = true, |
649 | .parallel_ops = true, | |
650 | .ops = dp_packet_genl_ops, | |
651 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 652 | .module = THIS_MODULE, |
0c200ef9 PS |
653 | }; |
654 | ||
12eb18f7 | 655 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 656 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
657 | { |
658 | int i; | |
ccb1352e | 659 | |
1bd7116f AZ |
660 | memset(mega_stats, 0, sizeof(*mega_stats)); |
661 | ||
b637e498 | 662 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 663 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
664 | |
665 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 666 | |
ccb1352e JG |
667 | for_each_possible_cpu(i) { |
668 | const struct dp_stats_percpu *percpu_stats; | |
669 | struct dp_stats_percpu local_stats; | |
670 | unsigned int start; | |
671 | ||
672 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
673 | ||
674 | do { | |
57a7744e | 675 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 676 | local_stats = *percpu_stats; |
57a7744e | 677 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
678 | |
679 | stats->n_hit += local_stats.n_hit; | |
680 | stats->n_missed += local_stats.n_missed; | |
681 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 682 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
683 | } |
684 | } | |
685 | ||
74ed7ab9 JS |
686 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
687 | { | |
688 | return ovs_identifier_is_ufid(sfid) && | |
689 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
690 | } | |
691 | ||
692 | static bool should_fill_mask(uint32_t ufid_flags) | |
693 | { | |
694 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
695 | } | |
696 | ||
697 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 698 | { |
74ed7ab9 JS |
699 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
700 | } | |
701 | ||
702 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
703 | const struct sw_flow_id *sfid, | |
704 | uint32_t ufid_flags) | |
705 | { | |
706 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
707 | ||
708 | /* OVS_FLOW_ATTR_UFID */ | |
709 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
710 | len += nla_total_size(sfid->ufid_len); | |
711 | ||
712 | /* OVS_FLOW_ATTR_KEY */ | |
713 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
714 | len += nla_total_size(ovs_key_attr_size()); | |
715 | ||
716 | /* OVS_FLOW_ATTR_MASK */ | |
717 | if (should_fill_mask(ufid_flags)) | |
718 | len += nla_total_size(ovs_key_attr_size()); | |
719 | ||
720 | /* OVS_FLOW_ATTR_ACTIONS */ | |
721 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 722 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
723 | |
724 | return len | |
66c7a5ee | 725 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 726 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 727 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
728 | } |
729 | ||
ca7105f2 JS |
730 | /* Called with ovs_mutex or RCU read lock. */ |
731 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
732 | struct sk_buff *skb) | |
733 | { | |
734 | struct ovs_flow_stats stats; | |
735 | __be16 tcp_flags; | |
736 | unsigned long used; | |
ccb1352e | 737 | |
e298e505 | 738 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 739 | |
028d6a67 | 740 | if (used && |
0238b720 ND |
741 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
742 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 743 | return -EMSGSIZE; |
ccb1352e | 744 | |
028d6a67 | 745 | if (stats.n_packets && |
66c7a5ee ND |
746 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
747 | sizeof(struct ovs_flow_stats), &stats, | |
748 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 749 | return -EMSGSIZE; |
ccb1352e | 750 | |
e298e505 PS |
751 | if ((u8)ntohs(tcp_flags) && |
752 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
753 | return -EMSGSIZE; |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
758 | /* Called with ovs_mutex or RCU read lock. */ | |
759 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
760 | struct sk_buff *skb, int skb_orig_len) | |
761 | { | |
762 | struct nlattr *start; | |
763 | int err; | |
ccb1352e JG |
764 | |
765 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
766 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
767 | * Netlink but individual action lists can be longer than | |
768 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
769 | * The userspace caller can always fetch the actions separately if it | |
770 | * really wants them. (Most userspace callers in fact don't care.) | |
771 | * | |
772 | * This can only fail for dump operations because the skb is always | |
773 | * properly sized for single flows. | |
774 | */ | |
ae0be8de | 775 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 776 | if (start) { |
d57170b1 PS |
777 | const struct sw_flow_actions *sf_acts; |
778 | ||
663efa36 | 779 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
780 | err = ovs_nla_put_actions(sf_acts->actions, |
781 | sf_acts->actions_len, skb); | |
0e9796b4 | 782 | |
74f84a57 PS |
783 | if (!err) |
784 | nla_nest_end(skb, start); | |
785 | else { | |
786 | if (skb_orig_len) | |
ca7105f2 | 787 | return err; |
74f84a57 PS |
788 | |
789 | nla_nest_cancel(skb, start); | |
790 | } | |
ca7105f2 JS |
791 | } else if (skb_orig_len) { |
792 | return -EMSGSIZE; | |
793 | } | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Called with ovs_mutex or RCU read lock. */ | |
799 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
800 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 801 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
802 | { |
803 | const int skb_orig_len = skb->len; | |
804 | struct ovs_header *ovs_header; | |
805 | int err; | |
806 | ||
807 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
808 | flags, cmd); | |
809 | if (!ovs_header) | |
810 | return -EMSGSIZE; | |
811 | ||
812 | ovs_header->dp_ifindex = dp_ifindex; | |
813 | ||
74ed7ab9 | 814 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
815 | if (err) |
816 | goto error; | |
817 | ||
74ed7ab9 JS |
818 | if (should_fill_key(&flow->id, ufid_flags)) { |
819 | err = ovs_nla_put_masked_key(flow, skb); | |
820 | if (err) | |
821 | goto error; | |
822 | } | |
823 | ||
824 | if (should_fill_mask(ufid_flags)) { | |
825 | err = ovs_nla_put_mask(flow, skb); | |
826 | if (err) | |
827 | goto error; | |
828 | } | |
ca7105f2 JS |
829 | |
830 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
831 | if (err) | |
832 | goto error; | |
833 | ||
74ed7ab9 JS |
834 | if (should_fill_actions(ufid_flags)) { |
835 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
836 | if (err) | |
837 | goto error; | |
838 | } | |
ccb1352e | 839 | |
053c095a JB |
840 | genlmsg_end(skb, ovs_header); |
841 | return 0; | |
ccb1352e | 842 | |
ccb1352e JG |
843 | error: |
844 | genlmsg_cancel(skb, ovs_header); | |
845 | return err; | |
846 | } | |
847 | ||
0e9796b4 JR |
848 | /* May not be called with RCU read lock. */ |
849 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 850 | const struct sw_flow_id *sfid, |
fb5d1e9e | 851 | struct genl_info *info, |
74ed7ab9 JS |
852 | bool always, |
853 | uint32_t ufid_flags) | |
ccb1352e | 854 | { |
fb5d1e9e | 855 | struct sk_buff *skb; |
74ed7ab9 | 856 | size_t len; |
ccb1352e | 857 | |
9b67aa4a | 858 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
859 | return NULL; |
860 | ||
74ed7ab9 | 861 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 862 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
863 | if (!skb) |
864 | return ERR_PTR(-ENOMEM); | |
865 | ||
866 | return skb; | |
ccb1352e JG |
867 | } |
868 | ||
0e9796b4 JR |
869 | /* Called with ovs_mutex. */ |
870 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
871 | int dp_ifindex, | |
872 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 873 | bool always, u32 ufid_flags) |
ccb1352e JG |
874 | { |
875 | struct sk_buff *skb; | |
876 | int retval; | |
877 | ||
74ed7ab9 JS |
878 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
879 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 880 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 881 | return skb; |
ccb1352e | 882 | |
0e9796b4 JR |
883 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
884 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 885 | cmd, ufid_flags); |
ccb1352e JG |
886 | BUG_ON(retval < 0); |
887 | return skb; | |
888 | } | |
889 | ||
37bdc87b | 890 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 891 | { |
7f8a436e | 892 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
893 | struct nlattr **a = info->attrs; |
894 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 895 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 896 | struct sw_flow_mask mask; |
ccb1352e JG |
897 | struct sk_buff *reply; |
898 | struct datapath *dp; | |
37bdc87b | 899 | struct sw_flow_actions *acts; |
03f0d916 | 900 | struct sw_flow_match match; |
74ed7ab9 | 901 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 902 | int error; |
05da5898 | 903 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 904 | |
893f139b | 905 | /* Must have key and actions. */ |
ccb1352e | 906 | error = -EINVAL; |
426cda5c | 907 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 908 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 909 | goto error; |
426cda5c JG |
910 | } |
911 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 912 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 913 | goto error; |
426cda5c | 914 | } |
03f0d916 | 915 | |
893f139b JR |
916 | /* Most of the time we need to allocate a new flow, do it before |
917 | * locking. | |
918 | */ | |
919 | new_flow = ovs_flow_alloc(); | |
920 | if (IS_ERR(new_flow)) { | |
921 | error = PTR_ERR(new_flow); | |
922 | goto error; | |
923 | } | |
924 | ||
925 | /* Extract key. */ | |
2279994d | 926 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 927 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 928 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 929 | if (error) |
893f139b | 930 | goto err_kfree_flow; |
ccb1352e | 931 | |
74ed7ab9 JS |
932 | /* Extract flow identifier. */ |
933 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 934 | &new_flow->key, log); |
74ed7ab9 JS |
935 | if (error) |
936 | goto err_kfree_flow; | |
74f84a57 | 937 | |
190aa3e7 | 938 | /* unmasked key is needed to match when ufid is not used. */ |
939 | if (ovs_identifier_is_key(&new_flow->id)) | |
940 | match.key = new_flow->id.unmasked_key; | |
941 | ||
942 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
943 | ||
893f139b | 944 | /* Validate actions. */ |
7f8a436e JS |
945 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
946 | &new_flow->key, &acts, log); | |
37bdc87b | 947 | if (error) { |
05da5898 | 948 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 949 | goto err_kfree_flow; |
893f139b JR |
950 | } |
951 | ||
74ed7ab9 JS |
952 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
953 | ufid_flags); | |
893f139b JR |
954 | if (IS_ERR(reply)) { |
955 | error = PTR_ERR(reply); | |
956 | goto err_kfree_acts; | |
ccb1352e JG |
957 | } |
958 | ||
8e4e1713 | 959 | ovs_lock(); |
7f8a436e | 960 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
961 | if (unlikely(!dp)) { |
962 | error = -ENODEV; | |
8e4e1713 | 963 | goto err_unlock_ovs; |
893f139b | 964 | } |
74ed7ab9 | 965 | |
03f0d916 | 966 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
967 | if (ovs_identifier_is_ufid(&new_flow->id)) |
968 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
969 | if (!flow) | |
190aa3e7 | 970 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
971 | if (likely(!flow)) { |
972 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
973 | |
974 | /* Put flow in bucket. */ | |
893f139b JR |
975 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
976 | if (unlikely(error)) { | |
618ed0c8 | 977 | acts = NULL; |
893f139b JR |
978 | goto err_unlock_ovs; |
979 | } | |
980 | ||
981 | if (unlikely(reply)) { | |
982 | error = ovs_flow_cmd_fill_info(new_flow, | |
983 | ovs_header->dp_ifindex, | |
984 | reply, info->snd_portid, | |
985 | info->snd_seq, 0, | |
74ed7ab9 JS |
986 | OVS_FLOW_CMD_NEW, |
987 | ufid_flags); | |
893f139b | 988 | BUG_ON(error < 0); |
618ed0c8 | 989 | } |
893f139b | 990 | ovs_unlock(); |
ccb1352e | 991 | } else { |
37bdc87b JR |
992 | struct sw_flow_actions *old_acts; |
993 | ||
ccb1352e JG |
994 | /* Bail out if we're not allowed to modify an existing flow. |
995 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
996 | * because Generic Netlink treats the latter as a dump | |
997 | * request. We also accept NLM_F_EXCL in case that bug ever | |
998 | * gets fixed. | |
999 | */ | |
893f139b JR |
1000 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1001 | | NLM_F_EXCL))) { | |
1002 | error = -EEXIST; | |
8e4e1713 | 1003 | goto err_unlock_ovs; |
893f139b | 1004 | } |
74ed7ab9 JS |
1005 | /* The flow identifier has to be the same for flow updates. |
1006 | * Look for any overlapping flow. | |
1007 | */ | |
1008 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1009 | if (ovs_identifier_is_key(&flow->id)) | |
1010 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1011 | &match); | |
1012 | else /* UFID matches but key is different */ | |
1013 | flow = NULL; | |
4a46b24e AW |
1014 | if (!flow) { |
1015 | error = -ENOENT; | |
1016 | goto err_unlock_ovs; | |
1017 | } | |
893f139b | 1018 | } |
37bdc87b JR |
1019 | /* Update actions. */ |
1020 | old_acts = ovsl_dereference(flow->sf_acts); | |
1021 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1022 | |
893f139b JR |
1023 | if (unlikely(reply)) { |
1024 | error = ovs_flow_cmd_fill_info(flow, | |
1025 | ovs_header->dp_ifindex, | |
1026 | reply, info->snd_portid, | |
1027 | info->snd_seq, 0, | |
74ed7ab9 JS |
1028 | OVS_FLOW_CMD_NEW, |
1029 | ufid_flags); | |
893f139b JR |
1030 | BUG_ON(error < 0); |
1031 | } | |
1032 | ovs_unlock(); | |
37bdc87b | 1033 | |
34ae932a | 1034 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1035 | ovs_flow_free(new_flow, false); |
37bdc87b | 1036 | } |
893f139b JR |
1037 | |
1038 | if (reply) | |
1039 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1040 | return 0; |
1041 | ||
37bdc87b JR |
1042 | err_unlock_ovs: |
1043 | ovs_unlock(); | |
893f139b JR |
1044 | kfree_skb(reply); |
1045 | err_kfree_acts: | |
34ae932a | 1046 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1047 | err_kfree_flow: |
1048 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1049 | error: |
1050 | return error; | |
1051 | } | |
ccb1352e | 1052 | |
2fdb957d | 1053 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
26063790 | 1054 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
7f8a436e | 1055 | const struct nlattr *a, |
6b205b2c | 1056 | const struct sw_flow_key *key, |
05da5898 JR |
1057 | const struct sw_flow_mask *mask, |
1058 | bool log) | |
6b205b2c JG |
1059 | { |
1060 | struct sw_flow_actions *acts; | |
1061 | struct sw_flow_key masked_key; | |
1062 | int error; | |
1063 | ||
ae5f2fb1 | 1064 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1065 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1066 | if (error) { |
05da5898 JR |
1067 | OVS_NLERR(log, |
1068 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1069 | return ERR_PTR(error); |
1070 | } | |
1071 | ||
1072 | return acts; | |
1073 | } | |
1074 | ||
9cc9a5cb TZ |
1075 | /* Factor out match-init and action-copy to avoid |
1076 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1077 | * used to get actions, we new a function to save some | |
1078 | * stack space. | |
1079 | * | |
1080 | * If there are not key and action attrs, we return 0 | |
1081 | * directly. In the case, the caller will also not use the | |
1082 | * match as before. If there is action attr, we try to get | |
1083 | * actions and save them to *acts. Before returning from | |
1084 | * the function, we reset the match->mask pointer. Because | |
1085 | * we should not to return match object with dangling reference | |
1086 | * to mask. | |
1087 | * */ | |
26063790 AB |
1088 | static noinline_for_stack int |
1089 | ovs_nla_init_match_and_action(struct net *net, | |
1090 | struct sw_flow_match *match, | |
1091 | struct sw_flow_key *key, | |
1092 | struct nlattr **a, | |
1093 | struct sw_flow_actions **acts, | |
1094 | bool log) | |
9cc9a5cb TZ |
1095 | { |
1096 | struct sw_flow_mask mask; | |
1097 | int error = 0; | |
1098 | ||
1099 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1100 | ovs_match_init(match, key, true, &mask); | |
1101 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1102 | a[OVS_FLOW_ATTR_MASK], log); | |
1103 | if (error) | |
1104 | goto error; | |
1105 | } | |
1106 | ||
1107 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1108 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1109 | OVS_NLERR(log, | |
1110 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1111 | error = -EINVAL; |
1112 | goto error; | |
9cc9a5cb TZ |
1113 | } |
1114 | ||
1115 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1116 | &mask, log); | |
1117 | if (IS_ERR(*acts)) { | |
1118 | error = PTR_ERR(*acts); | |
1119 | goto error; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* On success, error is 0. */ | |
1124 | error: | |
1125 | match->mask = NULL; | |
1126 | return error; | |
1127 | } | |
1128 | ||
37bdc87b JR |
1129 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1130 | { | |
7f8a436e | 1131 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1132 | struct nlattr **a = info->attrs; |
1133 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1134 | struct sw_flow_key key; |
37bdc87b | 1135 | struct sw_flow *flow; |
37bdc87b JR |
1136 | struct sk_buff *reply = NULL; |
1137 | struct datapath *dp; | |
893f139b | 1138 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1139 | struct sw_flow_match match; |
74ed7ab9 JS |
1140 | struct sw_flow_id sfid; |
1141 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1142 | int error = 0; |
05da5898 | 1143 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1144 | bool ufid_present; |
37bdc87b | 1145 | |
74ed7ab9 | 1146 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1147 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1148 | OVS_NLERR(log, |
1149 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1150 | return -EINVAL; |
6f15cdbf | 1151 | } |
9cc9a5cb TZ |
1152 | |
1153 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1154 | &acts, log); | |
37bdc87b JR |
1155 | if (error) |
1156 | goto error; | |
1157 | ||
9cc9a5cb | 1158 | if (acts) { |
2fdb957d | 1159 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1160 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1161 | ufid_flags); | |
893f139b JR |
1162 | if (IS_ERR(reply)) { |
1163 | error = PTR_ERR(reply); | |
1164 | goto err_kfree_acts; | |
be52c9e9 | 1165 | } |
37bdc87b | 1166 | } |
0e9796b4 | 1167 | |
37bdc87b | 1168 | ovs_lock(); |
7f8a436e | 1169 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1170 | if (unlikely(!dp)) { |
1171 | error = -ENODEV; | |
37bdc87b | 1172 | goto err_unlock_ovs; |
893f139b | 1173 | } |
37bdc87b | 1174 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1175 | if (ufid_present) |
1176 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1177 | else | |
1178 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1179 | if (unlikely(!flow)) { |
1180 | error = -ENOENT; | |
37bdc87b | 1181 | goto err_unlock_ovs; |
893f139b | 1182 | } |
4a46b24e | 1183 | |
37bdc87b | 1184 | /* Update actions, if present. */ |
893f139b | 1185 | if (likely(acts)) { |
37bdc87b JR |
1186 | old_acts = ovsl_dereference(flow->sf_acts); |
1187 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1188 | |
1189 | if (unlikely(reply)) { | |
1190 | error = ovs_flow_cmd_fill_info(flow, | |
1191 | ovs_header->dp_ifindex, | |
1192 | reply, info->snd_portid, | |
1193 | info->snd_seq, 0, | |
804fe108 | 1194 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1195 | ufid_flags); |
893f139b JR |
1196 | BUG_ON(error < 0); |
1197 | } | |
1198 | } else { | |
1199 | /* Could not alloc without acts before locking. */ | |
1200 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1201 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1202 | ufid_flags); |
1203 | ||
b5ffe634 | 1204 | if (IS_ERR(reply)) { |
893f139b JR |
1205 | error = PTR_ERR(reply); |
1206 | goto err_unlock_ovs; | |
1207 | } | |
ccb1352e | 1208 | } |
37bdc87b | 1209 | |
37bdc87b JR |
1210 | /* Clear stats. */ |
1211 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1212 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1213 | ovs_unlock(); |
ccb1352e | 1214 | |
893f139b JR |
1215 | if (reply) |
1216 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1217 | if (old_acts) | |
34ae932a | 1218 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1219 | |
ccb1352e JG |
1220 | return 0; |
1221 | ||
8e4e1713 PS |
1222 | err_unlock_ovs: |
1223 | ovs_unlock(); | |
893f139b JR |
1224 | kfree_skb(reply); |
1225 | err_kfree_acts: | |
34ae932a | 1226 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1227 | error: |
1228 | return error; | |
1229 | } | |
1230 | ||
1231 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1232 | { | |
1233 | struct nlattr **a = info->attrs; | |
1234 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1235 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1236 | struct sw_flow_key key; |
1237 | struct sk_buff *reply; | |
1238 | struct sw_flow *flow; | |
1239 | struct datapath *dp; | |
03f0d916 | 1240 | struct sw_flow_match match; |
74ed7ab9 JS |
1241 | struct sw_flow_id ufid; |
1242 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1243 | int err = 0; | |
05da5898 | 1244 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1245 | bool ufid_present; |
ccb1352e | 1246 | |
74ed7ab9 JS |
1247 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1248 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1249 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1250 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1251 | log); |
1252 | } else if (!ufid_present) { | |
05da5898 JR |
1253 | OVS_NLERR(log, |
1254 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1255 | err = -EINVAL; |
03f0d916 | 1256 | } |
ccb1352e JG |
1257 | if (err) |
1258 | return err; | |
1259 | ||
8e4e1713 | 1260 | ovs_lock(); |
46df7b81 | 1261 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1262 | if (!dp) { |
1263 | err = -ENODEV; | |
1264 | goto unlock; | |
1265 | } | |
ccb1352e | 1266 | |
74ed7ab9 JS |
1267 | if (ufid_present) |
1268 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1269 | else | |
1270 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1271 | if (!flow) { |
8e4e1713 PS |
1272 | err = -ENOENT; |
1273 | goto unlock; | |
1274 | } | |
ccb1352e | 1275 | |
0e9796b4 | 1276 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1277 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1278 | if (IS_ERR(reply)) { |
1279 | err = PTR_ERR(reply); | |
1280 | goto unlock; | |
1281 | } | |
ccb1352e | 1282 | |
8e4e1713 | 1283 | ovs_unlock(); |
ccb1352e | 1284 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1285 | unlock: |
1286 | ovs_unlock(); | |
1287 | return err; | |
ccb1352e JG |
1288 | } |
1289 | ||
1290 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1291 | { | |
1292 | struct nlattr **a = info->attrs; | |
1293 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1294 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1295 | struct sw_flow_key key; |
1296 | struct sk_buff *reply; | |
74ed7ab9 | 1297 | struct sw_flow *flow = NULL; |
ccb1352e | 1298 | struct datapath *dp; |
03f0d916 | 1299 | struct sw_flow_match match; |
74ed7ab9 JS |
1300 | struct sw_flow_id ufid; |
1301 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1302 | int err; |
05da5898 | 1303 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1304 | bool ufid_present; |
ccb1352e | 1305 | |
74ed7ab9 JS |
1306 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1307 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1308 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1309 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1310 | NULL, log); | |
aed06778 JR |
1311 | if (unlikely(err)) |
1312 | return err; | |
1313 | } | |
1314 | ||
8e4e1713 | 1315 | ovs_lock(); |
46df7b81 | 1316 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1317 | if (unlikely(!dp)) { |
8e4e1713 PS |
1318 | err = -ENODEV; |
1319 | goto unlock; | |
1320 | } | |
46df7b81 | 1321 | |
74ed7ab9 | 1322 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1323 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1324 | goto unlock; |
1325 | } | |
03f0d916 | 1326 | |
74ed7ab9 JS |
1327 | if (ufid_present) |
1328 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1329 | else | |
1330 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1331 | if (unlikely(!flow)) { |
8e4e1713 PS |
1332 | err = -ENOENT; |
1333 | goto unlock; | |
1334 | } | |
ccb1352e | 1335 | |
b637e498 | 1336 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1337 | ovs_unlock(); |
ccb1352e | 1338 | |
aed06778 | 1339 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1340 | &flow->id, info, false, ufid_flags); |
aed06778 | 1341 | if (likely(reply)) { |
b90f5aa4 | 1342 | if (!IS_ERR(reply)) { |
aed06778 JR |
1343 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1344 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1345 | reply, info->snd_portid, | |
1346 | info->snd_seq, 0, | |
74ed7ab9 JS |
1347 | OVS_FLOW_CMD_DEL, |
1348 | ufid_flags); | |
aed06778 JR |
1349 | rcu_read_unlock(); |
1350 | BUG_ON(err < 0); | |
1351 | ||
1352 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1353 | } else { | |
1354 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1355 | } | |
fb5d1e9e | 1356 | } |
ccb1352e | 1357 | |
aed06778 | 1358 | ovs_flow_free(flow, true); |
ccb1352e | 1359 | return 0; |
8e4e1713 PS |
1360 | unlock: |
1361 | ovs_unlock(); | |
1362 | return err; | |
ccb1352e JG |
1363 | } |
1364 | ||
1365 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1366 | { | |
74ed7ab9 | 1367 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1368 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1369 | struct table_instance *ti; |
ccb1352e | 1370 | struct datapath *dp; |
74ed7ab9 JS |
1371 | u32 ufid_flags; |
1372 | int err; | |
1373 | ||
8cb08174 JB |
1374 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1375 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1376 | if (err) |
1377 | return err; | |
1378 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1379 | |
d57170b1 | 1380 | rcu_read_lock(); |
cc3a5ae6 | 1381 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1382 | if (!dp) { |
d57170b1 | 1383 | rcu_read_unlock(); |
ccb1352e | 1384 | return -ENODEV; |
8e4e1713 | 1385 | } |
ccb1352e | 1386 | |
b637e498 | 1387 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1388 | for (;;) { |
1389 | struct sw_flow *flow; | |
1390 | u32 bucket, obj; | |
1391 | ||
1392 | bucket = cb->args[0]; | |
1393 | obj = cb->args[1]; | |
b637e498 | 1394 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1395 | if (!flow) |
1396 | break; | |
1397 | ||
0e9796b4 | 1398 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1399 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1400 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1401 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1402 | break; |
1403 | ||
1404 | cb->args[0] = bucket; | |
1405 | cb->args[1] = obj; | |
1406 | } | |
d57170b1 | 1407 | rcu_read_unlock(); |
ccb1352e JG |
1408 | return skb->len; |
1409 | } | |
1410 | ||
0c200ef9 PS |
1411 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1412 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1413 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1414 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1415 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1416 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1417 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1418 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1419 | }; |
1420 | ||
48e48a70 | 1421 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1422 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1423 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1424 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1425 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1426 | }, |
1427 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1428 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1429 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1430 | .doit = ovs_flow_cmd_del |
1431 | }, | |
1432 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1433 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1434 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1435 | .doit = ovs_flow_cmd_get, |
1436 | .dumpit = ovs_flow_cmd_dump | |
1437 | }, | |
1438 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1439 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1440 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1441 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1442 | }, |
1443 | }; | |
1444 | ||
56989f6d | 1445 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1446 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1447 | .name = OVS_FLOW_FAMILY, |
1448 | .version = OVS_FLOW_VERSION, | |
1449 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1450 | .policy = flow_policy, |
3a4e0d6a PS |
1451 | .netnsok = true, |
1452 | .parallel_ops = true, | |
0c200ef9 PS |
1453 | .ops = dp_flow_genl_ops, |
1454 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1455 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1456 | .n_mcgrps = 1, | |
489111e5 | 1457 | .module = THIS_MODULE, |
ccb1352e JG |
1458 | }; |
1459 | ||
c3ff8cfe TG |
1460 | static size_t ovs_dp_cmd_msg_size(void) |
1461 | { | |
1462 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1463 | ||
1464 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1465 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1466 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1467 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1468 | |
1469 | return msgsize; | |
1470 | } | |
1471 | ||
8ec609d8 | 1472 | /* Called with ovs_mutex. */ |
ccb1352e | 1473 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1474 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1475 | { |
1476 | struct ovs_header *ovs_header; | |
1477 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1478 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1479 | int err; |
1480 | ||
15e47304 | 1481 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1482 | flags, cmd); |
1483 | if (!ovs_header) | |
1484 | goto error; | |
1485 | ||
1486 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1487 | ||
ccb1352e | 1488 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1489 | if (err) |
1490 | goto nla_put_failure; | |
1491 | ||
1bd7116f | 1492 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1493 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1494 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1495 | goto nla_put_failure; |
1496 | ||
66c7a5ee ND |
1497 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1498 | sizeof(struct ovs_dp_megaflow_stats), | |
1499 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1500 | goto nla_put_failure; |
ccb1352e | 1501 | |
43d4be9c TG |
1502 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1503 | goto nla_put_failure; | |
1504 | ||
053c095a JB |
1505 | genlmsg_end(skb, ovs_header); |
1506 | return 0; | |
ccb1352e JG |
1507 | |
1508 | nla_put_failure: | |
1509 | genlmsg_cancel(skb, ovs_header); | |
1510 | error: | |
1511 | return -EMSGSIZE; | |
1512 | } | |
1513 | ||
263ea090 | 1514 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1515 | { |
551ddc05 | 1516 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1517 | } |
1518 | ||
bb6f9a70 | 1519 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1520 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1521 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1522 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1523 | { | |
1524 | struct datapath *dp; | |
1525 | ||
1526 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1527 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1528 | else { |
1529 | struct vport *vport; | |
1530 | ||
46df7b81 | 1531 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1532 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1533 | } |
1534 | return dp ? dp : ERR_PTR(-ENODEV); | |
1535 | } | |
1536 | ||
44da5ae5 TG |
1537 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1538 | { | |
1539 | struct datapath *dp; | |
1540 | ||
1541 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1542 | if (IS_ERR(dp)) |
44da5ae5 TG |
1543 | return; |
1544 | ||
1545 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1546 | dp->user_features = 0; | |
1547 | } | |
1548 | ||
95a7233c PB |
1549 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1550 | ||
1551 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
43d4be9c | 1552 | { |
95a7233c PB |
1553 | u32 user_features = 0; |
1554 | ||
1555 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1556 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1557 | ||
1558 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1559 | OVS_DP_F_UNALIGNED | | |
1560 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1561 | return -EOPNOTSUPP; | |
1562 | ||
1563 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1564 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1565 | return -EOPNOTSUPP; | |
1566 | #endif | |
1567 | } | |
1568 | ||
1569 | dp->user_features = user_features; | |
1570 | ||
1571 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1572 | static_branch_enable(&tc_recirc_sharing_support); | |
1573 | else | |
1574 | static_branch_disable(&tc_recirc_sharing_support); | |
1575 | ||
1576 | return 0; | |
43d4be9c TG |
1577 | } |
1578 | ||
ccb1352e JG |
1579 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1580 | { | |
1581 | struct nlattr **a = info->attrs; | |
1582 | struct vport_parms parms; | |
1583 | struct sk_buff *reply; | |
1584 | struct datapath *dp; | |
1585 | struct vport *vport; | |
46df7b81 | 1586 | struct ovs_net *ovs_net; |
15eac2a7 | 1587 | int err, i; |
ccb1352e JG |
1588 | |
1589 | err = -EINVAL; | |
1590 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1591 | goto err; | |
1592 | ||
263ea090 | 1593 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1594 | if (!reply) |
1595 | return -ENOMEM; | |
ccb1352e JG |
1596 | |
1597 | err = -ENOMEM; | |
1598 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1599 | if (dp == NULL) | |
6093ae9a | 1600 | goto err_free_reply; |
46df7b81 | 1601 | |
efd7ef1c | 1602 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1603 | |
1604 | /* Allocate table. */ | |
b637e498 PS |
1605 | err = ovs_flow_tbl_init(&dp->table); |
1606 | if (err) | |
ccb1352e JG |
1607 | goto err_free_dp; |
1608 | ||
1c213bd2 | 1609 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
ccb1352e JG |
1610 | if (!dp->stats_percpu) { |
1611 | err = -ENOMEM; | |
1612 | goto err_destroy_table; | |
1613 | } | |
1614 | ||
6da2ec56 KC |
1615 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, |
1616 | sizeof(struct hlist_head), | |
1617 | GFP_KERNEL); | |
15eac2a7 PS |
1618 | if (!dp->ports) { |
1619 | err = -ENOMEM; | |
1620 | goto err_destroy_percpu; | |
1621 | } | |
1622 | ||
1623 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1624 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1625 | ||
96fbc13d AZ |
1626 | err = ovs_meters_init(dp); |
1627 | if (err) | |
1628 | goto err_destroy_ports_array; | |
1629 | ||
ccb1352e JG |
1630 | /* Set up our datapath device. */ |
1631 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1632 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1633 | parms.options = NULL; | |
1634 | parms.dp = dp; | |
1635 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1636 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1637 | |
95a7233c PB |
1638 | err = ovs_dp_change(dp, a); |
1639 | if (err) | |
1640 | goto err_destroy_meters; | |
43d4be9c | 1641 | |
6093ae9a JR |
1642 | /* So far only local changes have been made, now need the lock. */ |
1643 | ovs_lock(); | |
1644 | ||
ccb1352e JG |
1645 | vport = new_vport(&parms); |
1646 | if (IS_ERR(vport)) { | |
1647 | err = PTR_ERR(vport); | |
1648 | if (err == -EBUSY) | |
1649 | err = -EEXIST; | |
1650 | ||
44da5ae5 TG |
1651 | if (err == -EEXIST) { |
1652 | /* An outdated user space instance that does not understand | |
1653 | * the concept of user_features has attempted to create a new | |
1654 | * datapath and is likely to reuse it. Drop all user features. | |
1655 | */ | |
1656 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1657 | ovs_dp_reset_user_features(skb, info); | |
1658 | } | |
1659 | ||
4c76bf69 | 1660 | ovs_unlock(); |
96fbc13d | 1661 | goto err_destroy_meters; |
ccb1352e JG |
1662 | } |
1663 | ||
6093ae9a JR |
1664 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1665 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1666 | BUG_ON(err < 0); | |
ccb1352e | 1667 | |
46df7b81 | 1668 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1669 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1670 | |
1671 | ovs_unlock(); | |
ccb1352e | 1672 | |
2a94fe48 | 1673 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1674 | return 0; |
1675 | ||
96fbc13d | 1676 | err_destroy_meters: |
96fbc13d AZ |
1677 | ovs_meters_exit(dp); |
1678 | err_destroy_ports_array: | |
15eac2a7 | 1679 | kfree(dp->ports); |
ccb1352e JG |
1680 | err_destroy_percpu: |
1681 | free_percpu(dp->stats_percpu); | |
1682 | err_destroy_table: | |
9b996e54 | 1683 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e JG |
1684 | err_free_dp: |
1685 | kfree(dp); | |
6093ae9a JR |
1686 | err_free_reply: |
1687 | kfree_skb(reply); | |
ccb1352e JG |
1688 | err: |
1689 | return err; | |
1690 | } | |
1691 | ||
8e4e1713 | 1692 | /* Called with ovs_mutex. */ |
46df7b81 | 1693 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1694 | { |
15eac2a7 | 1695 | int i; |
ccb1352e | 1696 | |
15eac2a7 PS |
1697 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1698 | struct vport *vport; | |
b67bfe0d | 1699 | struct hlist_node *n; |
15eac2a7 | 1700 | |
b67bfe0d | 1701 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1702 | if (vport->port_no != OVSP_LOCAL) |
1703 | ovs_dp_detach_port(vport); | |
1704 | } | |
ccb1352e | 1705 | |
59a35d60 | 1706 | list_del_rcu(&dp->list_node); |
ccb1352e | 1707 | |
8e4e1713 | 1708 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1709 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1710 | */ |
8e4e1713 | 1711 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1712 | |
e80857cc | 1713 | /* RCU destroy the flow table */ |
ccb1352e | 1714 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1715 | } |
1716 | ||
1717 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1718 | { | |
1719 | struct sk_buff *reply; | |
1720 | struct datapath *dp; | |
1721 | int err; | |
1722 | ||
263ea090 | 1723 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1724 | if (!reply) |
1725 | return -ENOMEM; | |
1726 | ||
8e4e1713 | 1727 | ovs_lock(); |
46df7b81 PS |
1728 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1729 | err = PTR_ERR(dp); | |
1730 | if (IS_ERR(dp)) | |
6093ae9a | 1731 | goto err_unlock_free; |
46df7b81 | 1732 | |
6093ae9a JR |
1733 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1734 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1735 | BUG_ON(err < 0); | |
46df7b81 PS |
1736 | |
1737 | __dp_destroy(dp); | |
8e4e1713 | 1738 | ovs_unlock(); |
ccb1352e | 1739 | |
2a94fe48 | 1740 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1741 | |
1742 | return 0; | |
6093ae9a JR |
1743 | |
1744 | err_unlock_free: | |
8e4e1713 | 1745 | ovs_unlock(); |
6093ae9a | 1746 | kfree_skb(reply); |
8e4e1713 | 1747 | return err; |
ccb1352e JG |
1748 | } |
1749 | ||
1750 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1751 | { | |
1752 | struct sk_buff *reply; | |
1753 | struct datapath *dp; | |
1754 | int err; | |
1755 | ||
263ea090 | 1756 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1757 | if (!reply) |
1758 | return -ENOMEM; | |
1759 | ||
8e4e1713 | 1760 | ovs_lock(); |
46df7b81 | 1761 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1762 | err = PTR_ERR(dp); |
ccb1352e | 1763 | if (IS_ERR(dp)) |
6093ae9a | 1764 | goto err_unlock_free; |
ccb1352e | 1765 | |
95a7233c PB |
1766 | err = ovs_dp_change(dp, info->attrs); |
1767 | if (err) | |
1768 | goto err_unlock_free; | |
43d4be9c | 1769 | |
6093ae9a | 1770 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1771 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1772 | BUG_ON(err < 0); |
ccb1352e | 1773 | |
8e4e1713 | 1774 | ovs_unlock(); |
2a94fe48 | 1775 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1776 | |
1777 | return 0; | |
6093ae9a JR |
1778 | |
1779 | err_unlock_free: | |
8e4e1713 | 1780 | ovs_unlock(); |
6093ae9a | 1781 | kfree_skb(reply); |
8e4e1713 | 1782 | return err; |
ccb1352e JG |
1783 | } |
1784 | ||
1785 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1786 | { | |
1787 | struct sk_buff *reply; | |
1788 | struct datapath *dp; | |
8e4e1713 | 1789 | int err; |
ccb1352e | 1790 | |
263ea090 | 1791 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1792 | if (!reply) |
1793 | return -ENOMEM; | |
1794 | ||
8ec609d8 | 1795 | ovs_lock(); |
46df7b81 | 1796 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1797 | if (IS_ERR(dp)) { |
1798 | err = PTR_ERR(dp); | |
6093ae9a | 1799 | goto err_unlock_free; |
8e4e1713 | 1800 | } |
6093ae9a | 1801 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1802 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1803 | BUG_ON(err < 0); |
8ec609d8 | 1804 | ovs_unlock(); |
ccb1352e JG |
1805 | |
1806 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1807 | |
6093ae9a | 1808 | err_unlock_free: |
8ec609d8 | 1809 | ovs_unlock(); |
6093ae9a | 1810 | kfree_skb(reply); |
8e4e1713 | 1811 | return err; |
ccb1352e JG |
1812 | } |
1813 | ||
1814 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1815 | { | |
46df7b81 | 1816 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1817 | struct datapath *dp; |
1818 | int skip = cb->args[0]; | |
1819 | int i = 0; | |
1820 | ||
8ec609d8 PS |
1821 | ovs_lock(); |
1822 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1823 | if (i >= skip && |
15e47304 | 1824 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1825 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1826 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1827 | break; |
1828 | i++; | |
1829 | } | |
8ec609d8 | 1830 | ovs_unlock(); |
ccb1352e JG |
1831 | |
1832 | cb->args[0] = i; | |
1833 | ||
1834 | return skb->len; | |
1835 | } | |
1836 | ||
0c200ef9 PS |
1837 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1838 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1839 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1840 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1841 | }; | |
1842 | ||
48e48a70 | 1843 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1844 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1845 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1846 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1847 | .doit = ovs_dp_cmd_new |
1848 | }, | |
1849 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 1850 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1851 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1852 | .doit = ovs_dp_cmd_del |
1853 | }, | |
1854 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 1855 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1856 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1857 | .doit = ovs_dp_cmd_get, |
1858 | .dumpit = ovs_dp_cmd_dump | |
1859 | }, | |
1860 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 1861 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1862 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1863 | .doit = ovs_dp_cmd_set, |
1864 | }, | |
1865 | }; | |
1866 | ||
56989f6d | 1867 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1868 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1869 | .name = OVS_DATAPATH_FAMILY, |
1870 | .version = OVS_DATAPATH_VERSION, | |
1871 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 1872 | .policy = datapath_policy, |
3a4e0d6a PS |
1873 | .netnsok = true, |
1874 | .parallel_ops = true, | |
0c200ef9 PS |
1875 | .ops = dp_datapath_genl_ops, |
1876 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1877 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1878 | .n_mcgrps = 1, | |
489111e5 | 1879 | .module = THIS_MODULE, |
ccb1352e JG |
1880 | }; |
1881 | ||
8e4e1713 | 1882 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1883 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 | 1884 | struct net *net, u32 portid, u32 seq, |
d4e4fdf9 | 1885 | u32 flags, u8 cmd, gfp_t gfp) |
ccb1352e JG |
1886 | { |
1887 | struct ovs_header *ovs_header; | |
1888 | struct ovs_vport_stats vport_stats; | |
1889 | int err; | |
1890 | ||
15e47304 | 1891 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1892 | flags, cmd); |
1893 | if (!ovs_header) | |
1894 | return -EMSGSIZE; | |
1895 | ||
1896 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1897 | ||
028d6a67 DM |
1898 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1899 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1900 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1901 | ovs_vport_name(vport)) || |
1902 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1903 | goto nla_put_failure; |
ccb1352e | 1904 | |
9354d452 | 1905 | if (!net_eq(net, dev_net(vport->dev))) { |
d4e4fdf9 | 1906 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
9354d452 JB |
1907 | |
1908 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1909 | goto nla_put_failure; | |
1910 | } | |
1911 | ||
ccb1352e | 1912 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1913 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1914 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1915 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1916 | goto nla_put_failure; |
ccb1352e | 1917 | |
5cd667b0 AW |
1918 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1919 | goto nla_put_failure; | |
1920 | ||
ccb1352e JG |
1921 | err = ovs_vport_get_options(vport, skb); |
1922 | if (err == -EMSGSIZE) | |
1923 | goto error; | |
1924 | ||
053c095a JB |
1925 | genlmsg_end(skb, ovs_header); |
1926 | return 0; | |
ccb1352e JG |
1927 | |
1928 | nla_put_failure: | |
1929 | err = -EMSGSIZE; | |
1930 | error: | |
1931 | genlmsg_cancel(skb, ovs_header); | |
1932 | return err; | |
1933 | } | |
1934 | ||
6093ae9a JR |
1935 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1936 | { | |
1937 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1938 | } | |
1939 | ||
1940 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
1941 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1942 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
1943 | { |
1944 | struct sk_buff *skb; | |
1945 | int retval; | |
1946 | ||
d4e4fdf9 | 1947 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
ccb1352e JG |
1948 | if (!skb) |
1949 | return ERR_PTR(-ENOMEM); | |
1950 | ||
d4e4fdf9 GN |
1951 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
1952 | GFP_KERNEL); | |
a9341512 JG |
1953 | BUG_ON(retval < 0); |
1954 | ||
ccb1352e JG |
1955 | return skb; |
1956 | } | |
1957 | ||
8e4e1713 | 1958 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 1959 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 1960 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1961 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
1962 | { | |
1963 | struct datapath *dp; | |
1964 | struct vport *vport; | |
1965 | ||
9354d452 JB |
1966 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1967 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 1968 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 1969 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
1970 | if (!vport) |
1971 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
1972 | if (ovs_header->dp_ifindex && |
1973 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1974 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
1975 | return vport; |
1976 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
1977 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1978 | ||
1979 | if (port_no >= DP_MAX_PORTS) | |
1980 | return ERR_PTR(-EFBIG); | |
1981 | ||
46df7b81 | 1982 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1983 | if (!dp) |
1984 | return ERR_PTR(-ENODEV); | |
1985 | ||
8e4e1713 | 1986 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 1987 | if (!vport) |
14408dba | 1988 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
1989 | return vport; |
1990 | } else | |
1991 | return ERR_PTR(-EINVAL); | |
9354d452 | 1992 | |
ccb1352e JG |
1993 | } |
1994 | ||
6b660c41 | 1995 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 1996 | { |
6b660c41 | 1997 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
1998 | struct net_device *dev; |
1999 | struct vport *vport; | |
2000 | int i; | |
2001 | ||
2002 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2003 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
2004 | dev = vport->dev; | |
2005 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2006 | if (dev_headroom > max_headroom) | |
2007 | max_headroom = dev_headroom; | |
2008 | } | |
2009 | } | |
2010 | ||
6b660c41 TY |
2011 | return max_headroom; |
2012 | } | |
2013 | ||
2014 | /* Called with ovs_mutex */ | |
2015 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2016 | { | |
2017 | struct vport *vport; | |
2018 | int i; | |
2019 | ||
2020 | dp->max_headroom = new_headroom; | |
3a927bc7 PA |
2021 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) |
2022 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
6b660c41 | 2023 | netdev_set_rx_headroom(vport->dev, new_headroom); |
3a927bc7 PA |
2024 | } |
2025 | ||
ccb1352e JG |
2026 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2027 | { | |
2028 | struct nlattr **a = info->attrs; | |
2029 | struct ovs_header *ovs_header = info->userhdr; | |
2030 | struct vport_parms parms; | |
2031 | struct sk_buff *reply; | |
2032 | struct vport *vport; | |
2033 | struct datapath *dp; | |
6b660c41 | 2034 | unsigned int new_headroom; |
ccb1352e JG |
2035 | u32 port_no; |
2036 | int err; | |
2037 | ||
ccb1352e JG |
2038 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2039 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2040 | return -EINVAL; |
9354d452 JB |
2041 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2042 | return -EOPNOTSUPP; | |
6093ae9a JR |
2043 | |
2044 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2045 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2046 | if (port_no >= DP_MAX_PORTS) | |
2047 | return -EFBIG; | |
2048 | ||
2049 | reply = ovs_vport_cmd_alloc_info(); | |
2050 | if (!reply) | |
2051 | return -ENOMEM; | |
ccb1352e | 2052 | |
8e4e1713 | 2053 | ovs_lock(); |
62b9c8d0 | 2054 | restart: |
46df7b81 | 2055 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2056 | err = -ENODEV; |
2057 | if (!dp) | |
6093ae9a | 2058 | goto exit_unlock_free; |
ccb1352e | 2059 | |
6093ae9a | 2060 | if (port_no) { |
8e4e1713 | 2061 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2062 | err = -EBUSY; |
2063 | if (vport) | |
6093ae9a | 2064 | goto exit_unlock_free; |
ccb1352e JG |
2065 | } else { |
2066 | for (port_no = 1; ; port_no++) { | |
2067 | if (port_no >= DP_MAX_PORTS) { | |
2068 | err = -EFBIG; | |
6093ae9a | 2069 | goto exit_unlock_free; |
ccb1352e | 2070 | } |
8e4e1713 | 2071 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2072 | if (!vport) |
2073 | break; | |
2074 | } | |
2075 | } | |
2076 | ||
2077 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2078 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2079 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2080 | parms.dp = dp; | |
2081 | parms.port_no = port_no; | |
5cd667b0 | 2082 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2083 | |
2084 | vport = new_vport(&parms); | |
2085 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2086 | if (IS_ERR(vport)) { |
2087 | if (err == -EAGAIN) | |
2088 | goto restart; | |
6093ae9a | 2089 | goto exit_unlock_free; |
62b9c8d0 | 2090 | } |
ccb1352e | 2091 | |
9354d452 JB |
2092 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2093 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2094 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
3a927bc7 | 2095 | |
6b660c41 TY |
2096 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2097 | ||
2098 | if (new_headroom > dp->max_headroom) | |
2099 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2100 | else |
2101 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2102 | ||
6093ae9a JR |
2103 | BUG_ON(err < 0); |
2104 | ovs_unlock(); | |
ed661185 | 2105 | |
2a94fe48 | 2106 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2107 | return 0; |
ccb1352e | 2108 | |
6093ae9a | 2109 | exit_unlock_free: |
8e4e1713 | 2110 | ovs_unlock(); |
6093ae9a | 2111 | kfree_skb(reply); |
ccb1352e JG |
2112 | return err; |
2113 | } | |
2114 | ||
2115 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2116 | { | |
2117 | struct nlattr **a = info->attrs; | |
2118 | struct sk_buff *reply; | |
2119 | struct vport *vport; | |
2120 | int err; | |
2121 | ||
6093ae9a JR |
2122 | reply = ovs_vport_cmd_alloc_info(); |
2123 | if (!reply) | |
2124 | return -ENOMEM; | |
2125 | ||
8e4e1713 | 2126 | ovs_lock(); |
46df7b81 | 2127 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2128 | err = PTR_ERR(vport); |
2129 | if (IS_ERR(vport)) | |
6093ae9a | 2130 | goto exit_unlock_free; |
ccb1352e | 2131 | |
ccb1352e | 2132 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2133 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2134 | err = -EINVAL; |
6093ae9a | 2135 | goto exit_unlock_free; |
a9341512 JG |
2136 | } |
2137 | ||
f44f3408 | 2138 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2139 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2140 | if (err) |
6093ae9a | 2141 | goto exit_unlock_free; |
f44f3408 | 2142 | } |
a9341512 | 2143 | |
5cd667b0 AW |
2144 | |
2145 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2146 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2147 | ||
2148 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2149 | if (err) | |
2150 | goto exit_unlock_free; | |
2151 | } | |
ccb1352e | 2152 | |
9354d452 JB |
2153 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2154 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2155 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
a9341512 | 2156 | BUG_ON(err < 0); |
ccb1352e | 2157 | |
8e4e1713 | 2158 | ovs_unlock(); |
2a94fe48 | 2159 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2160 | return 0; |
ccb1352e | 2161 | |
6093ae9a | 2162 | exit_unlock_free: |
8e4e1713 | 2163 | ovs_unlock(); |
6093ae9a | 2164 | kfree_skb(reply); |
ccb1352e JG |
2165 | return err; |
2166 | } | |
2167 | ||
2168 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2169 | { | |
6b660c41 | 2170 | bool update_headroom = false; |
ccb1352e JG |
2171 | struct nlattr **a = info->attrs; |
2172 | struct sk_buff *reply; | |
3a927bc7 | 2173 | struct datapath *dp; |
ccb1352e | 2174 | struct vport *vport; |
6b660c41 | 2175 | unsigned int new_headroom; |
ccb1352e JG |
2176 | int err; |
2177 | ||
6093ae9a JR |
2178 | reply = ovs_vport_cmd_alloc_info(); |
2179 | if (!reply) | |
2180 | return -ENOMEM; | |
2181 | ||
8e4e1713 | 2182 | ovs_lock(); |
46df7b81 | 2183 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2184 | err = PTR_ERR(vport); |
2185 | if (IS_ERR(vport)) | |
6093ae9a | 2186 | goto exit_unlock_free; |
ccb1352e JG |
2187 | |
2188 | if (vport->port_no == OVSP_LOCAL) { | |
2189 | err = -EINVAL; | |
6093ae9a | 2190 | goto exit_unlock_free; |
ccb1352e JG |
2191 | } |
2192 | ||
9354d452 JB |
2193 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2194 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2195 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
6093ae9a | 2196 | BUG_ON(err < 0); |
3a927bc7 PA |
2197 | |
2198 | /* the vport deletion may trigger dp headroom update */ | |
2199 | dp = vport->dp; | |
2200 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2201 | update_headroom = true; |
2202 | ||
3a927bc7 | 2203 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2204 | ovs_dp_detach_port(vport); |
3a927bc7 | 2205 | |
6b660c41 TY |
2206 | if (update_headroom) { |
2207 | new_headroom = ovs_get_max_headroom(dp); | |
2208 | ||
2209 | if (new_headroom < dp->max_headroom) | |
2210 | ovs_update_headroom(dp, new_headroom); | |
2211 | } | |
6093ae9a | 2212 | ovs_unlock(); |
ccb1352e | 2213 | |
2a94fe48 | 2214 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2215 | return 0; |
ccb1352e | 2216 | |
6093ae9a | 2217 | exit_unlock_free: |
8e4e1713 | 2218 | ovs_unlock(); |
6093ae9a | 2219 | kfree_skb(reply); |
ccb1352e JG |
2220 | return err; |
2221 | } | |
2222 | ||
2223 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2224 | { | |
2225 | struct nlattr **a = info->attrs; | |
2226 | struct ovs_header *ovs_header = info->userhdr; | |
2227 | struct sk_buff *reply; | |
2228 | struct vport *vport; | |
2229 | int err; | |
2230 | ||
6093ae9a JR |
2231 | reply = ovs_vport_cmd_alloc_info(); |
2232 | if (!reply) | |
2233 | return -ENOMEM; | |
2234 | ||
ccb1352e | 2235 | rcu_read_lock(); |
46df7b81 | 2236 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2237 | err = PTR_ERR(vport); |
2238 | if (IS_ERR(vport)) | |
6093ae9a | 2239 | goto exit_unlock_free; |
9354d452 JB |
2240 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2241 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2242 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
6093ae9a | 2243 | BUG_ON(err < 0); |
ccb1352e JG |
2244 | rcu_read_unlock(); |
2245 | ||
2246 | return genlmsg_reply(reply, info); | |
2247 | ||
6093ae9a | 2248 | exit_unlock_free: |
ccb1352e | 2249 | rcu_read_unlock(); |
6093ae9a | 2250 | kfree_skb(reply); |
ccb1352e JG |
2251 | return err; |
2252 | } | |
2253 | ||
2254 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2255 | { | |
2256 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2257 | struct datapath *dp; | |
15eac2a7 PS |
2258 | int bucket = cb->args[0], skip = cb->args[1]; |
2259 | int i, j = 0; | |
ccb1352e | 2260 | |
42ee19e2 | 2261 | rcu_read_lock(); |
cc3a5ae6 | 2262 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2263 | if (!dp) { |
2264 | rcu_read_unlock(); | |
ccb1352e | 2265 | return -ENODEV; |
42ee19e2 | 2266 | } |
15eac2a7 | 2267 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2268 | struct vport *vport; |
15eac2a7 PS |
2269 | |
2270 | j = 0; | |
b67bfe0d | 2271 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2272 | if (j >= skip && |
2273 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2274 | sock_net(skb->sk), |
15e47304 | 2275 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2276 | cb->nlh->nlmsg_seq, |
2277 | NLM_F_MULTI, | |
d4e4fdf9 GN |
2278 | OVS_VPORT_CMD_GET, |
2279 | GFP_ATOMIC) < 0) | |
15eac2a7 PS |
2280 | goto out; |
2281 | ||
2282 | j++; | |
2283 | } | |
2284 | skip = 0; | |
ccb1352e | 2285 | } |
15eac2a7 | 2286 | out: |
ccb1352e JG |
2287 | rcu_read_unlock(); |
2288 | ||
15eac2a7 PS |
2289 | cb->args[0] = i; |
2290 | cb->args[1] = j; | |
ccb1352e | 2291 | |
15eac2a7 | 2292 | return skb->len; |
ccb1352e JG |
2293 | } |
2294 | ||
0c200ef9 PS |
2295 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2296 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2297 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2298 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2299 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
ea8564c8 | 2300 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
0c200ef9 | 2301 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
9354d452 JB |
2302 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2303 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2304 | }; |
2305 | ||
48e48a70 | 2306 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2307 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2308 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2309 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2310 | .doit = ovs_vport_cmd_new |
2311 | }, | |
2312 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2313 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2314 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2315 | .doit = ovs_vport_cmd_del |
2316 | }, | |
2317 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2318 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2319 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2320 | .doit = ovs_vport_cmd_get, |
2321 | .dumpit = ovs_vport_cmd_dump | |
2322 | }, | |
2323 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2324 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2325 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2326 | .doit = ovs_vport_cmd_set, |
2327 | }, | |
2328 | }; | |
2329 | ||
56989f6d | 2330 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2331 | .hdrsize = sizeof(struct ovs_header), |
2332 | .name = OVS_VPORT_FAMILY, | |
2333 | .version = OVS_VPORT_VERSION, | |
2334 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2335 | .policy = vport_policy, |
0c200ef9 PS |
2336 | .netnsok = true, |
2337 | .parallel_ops = true, | |
2338 | .ops = dp_vport_genl_ops, | |
2339 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2340 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2341 | .n_mcgrps = 1, | |
489111e5 | 2342 | .module = THIS_MODULE, |
ccb1352e JG |
2343 | }; |
2344 | ||
0c200ef9 PS |
2345 | static struct genl_family * const dp_genl_families[] = { |
2346 | &dp_datapath_genl_family, | |
2347 | &dp_vport_genl_family, | |
2348 | &dp_flow_genl_family, | |
2349 | &dp_packet_genl_family, | |
96fbc13d | 2350 | &dp_meter_genl_family, |
11efd5cb YHW |
2351 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2352 | &dp_ct_limit_genl_family, | |
2353 | #endif | |
ccb1352e JG |
2354 | }; |
2355 | ||
2356 | static void dp_unregister_genl(int n_families) | |
2357 | { | |
2358 | int i; | |
2359 | ||
2360 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2361 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2362 | } |
2363 | ||
56989f6d | 2364 | static int __init dp_register_genl(void) |
ccb1352e | 2365 | { |
ccb1352e JG |
2366 | int err; |
2367 | int i; | |
2368 | ||
ccb1352e | 2369 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2370 | |
0c200ef9 | 2371 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2372 | if (err) |
2373 | goto error; | |
ccb1352e JG |
2374 | } |
2375 | ||
2376 | return 0; | |
2377 | ||
2378 | error: | |
0c200ef9 | 2379 | dp_unregister_genl(i); |
ccb1352e JG |
2380 | return err; |
2381 | } | |
2382 | ||
46df7b81 PS |
2383 | static int __net_init ovs_init_net(struct net *net) |
2384 | { | |
2385 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2386 | ||
2387 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2388 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
11efd5cb | 2389 | return ovs_ct_init(net); |
46df7b81 PS |
2390 | } |
2391 | ||
7b4577a9 PS |
2392 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2393 | struct list_head *head) | |
46df7b81 | 2394 | { |
8e4e1713 | 2395 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2396 | struct datapath *dp; |
2397 | ||
2398 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2399 | int i; | |
2400 | ||
2401 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2402 | struct vport *vport; | |
2403 | ||
2404 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2405 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2406 | continue; | |
2407 | ||
be4ace6e | 2408 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2409 | list_add(&vport->detach_list, head); |
2410 | } | |
2411 | } | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2416 | { | |
2417 | struct datapath *dp, *dp_next; | |
2418 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2419 | struct vport *vport, *vport_next; | |
2420 | struct net *net; | |
2421 | LIST_HEAD(head); | |
46df7b81 | 2422 | |
c2ac6673 | 2423 | ovs_ct_exit(dnet); |
8e4e1713 | 2424 | ovs_lock(); |
46df7b81 PS |
2425 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2426 | __dp_destroy(dp); | |
7b4577a9 | 2427 | |
f0b07bb1 | 2428 | down_read(&net_rwsem); |
7b4577a9 PS |
2429 | for_each_net(net) |
2430 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2431 | up_read(&net_rwsem); |
7b4577a9 PS |
2432 | |
2433 | /* Detach all vports from given namespace. */ | |
2434 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2435 | list_del(&vport->detach_list); | |
2436 | ovs_dp_detach_port(vport); | |
2437 | } | |
2438 | ||
8e4e1713 PS |
2439 | ovs_unlock(); |
2440 | ||
2441 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2442 | } |
2443 | ||
2444 | static struct pernet_operations ovs_net_ops = { | |
2445 | .init = ovs_init_net, | |
2446 | .exit = ovs_exit_net, | |
2447 | .id = &ovs_net_id, | |
2448 | .size = sizeof(struct ovs_net), | |
2449 | }; | |
2450 | ||
ccb1352e JG |
2451 | static int __init dp_init(void) |
2452 | { | |
ccb1352e JG |
2453 | int err; |
2454 | ||
3523b29b | 2455 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
ccb1352e JG |
2456 | |
2457 | pr_info("Open vSwitch switching datapath\n"); | |
2458 | ||
971427f3 | 2459 | err = action_fifos_init(); |
ccb1352e JG |
2460 | if (err) |
2461 | goto error; | |
2462 | ||
971427f3 AZ |
2463 | err = ovs_internal_dev_rtnl_link_register(); |
2464 | if (err) | |
2465 | goto error_action_fifos_exit; | |
2466 | ||
5b9e7e16 JP |
2467 | err = ovs_flow_init(); |
2468 | if (err) | |
2469 | goto error_unreg_rtnl_link; | |
2470 | ||
ccb1352e JG |
2471 | err = ovs_vport_init(); |
2472 | if (err) | |
2473 | goto error_flow_exit; | |
2474 | ||
46df7b81 | 2475 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2476 | if (err) |
2477 | goto error_vport_exit; | |
2478 | ||
46df7b81 PS |
2479 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2480 | if (err) | |
2481 | goto error_netns_exit; | |
2482 | ||
62b9c8d0 TG |
2483 | err = ovs_netdev_init(); |
2484 | if (err) | |
2485 | goto error_unreg_notifier; | |
2486 | ||
ccb1352e JG |
2487 | err = dp_register_genl(); |
2488 | if (err < 0) | |
62b9c8d0 | 2489 | goto error_unreg_netdev; |
ccb1352e | 2490 | |
ccb1352e JG |
2491 | return 0; |
2492 | ||
62b9c8d0 TG |
2493 | error_unreg_netdev: |
2494 | ovs_netdev_exit(); | |
ccb1352e JG |
2495 | error_unreg_notifier: |
2496 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2497 | error_netns_exit: |
2498 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2499 | error_vport_exit: |
2500 | ovs_vport_exit(); | |
2501 | error_flow_exit: | |
2502 | ovs_flow_exit(); | |
5b9e7e16 JP |
2503 | error_unreg_rtnl_link: |
2504 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2505 | error_action_fifos_exit: |
2506 | action_fifos_exit(); | |
ccb1352e JG |
2507 | error: |
2508 | return err; | |
2509 | } | |
2510 | ||
2511 | static void dp_cleanup(void) | |
2512 | { | |
ccb1352e | 2513 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2514 | ovs_netdev_exit(); |
ccb1352e | 2515 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2516 | unregister_pernet_device(&ovs_net_ops); |
2517 | rcu_barrier(); | |
ccb1352e JG |
2518 | ovs_vport_exit(); |
2519 | ovs_flow_exit(); | |
5b9e7e16 | 2520 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2521 | action_fifos_exit(); |
ccb1352e JG |
2522 | } |
2523 | ||
2524 | module_init(dp_init); | |
2525 | module_exit(dp_cleanup); | |
2526 | ||
2527 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2528 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2529 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2530 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2531 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2532 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2533 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2534 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |