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" |
c4ab7b56 | 46 | #include "openvswitch_trace.h" |
ccb1352e | 47 | #include "vport-internal_dev.h" |
cff63a52 | 48 | #include "vport-netdev.h" |
ccb1352e | 49 | |
c7d03a00 | 50 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 51 | |
0c200ef9 PS |
52 | static struct genl_family dp_packet_genl_family; |
53 | static struct genl_family dp_flow_genl_family; | |
54 | static struct genl_family dp_datapath_genl_family; | |
55 | ||
74ed7ab9 JS |
56 | static const struct nla_policy flow_policy[]; |
57 | ||
48e48a70 | 58 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
59 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
60 | }; |
61 | ||
48e48a70 | 62 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
63 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
64 | }; |
65 | ||
48e48a70 | 66 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
67 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
68 | }; |
69 | ||
fb5d1e9e JR |
70 | /* Check if need to build a reply message. |
71 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
72 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
73 | unsigned int group) | |
fb5d1e9e JR |
74 | { |
75 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 76 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
77 | } |
78 | ||
68eb5503 | 79 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 80 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 81 | { |
92c14d9b | 82 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
83 | } |
84 | ||
ccb1352e JG |
85 | /** |
86 | * DOC: Locking: | |
87 | * | |
8e4e1713 PS |
88 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
89 | * operations on vports, etc.), Writes to other state (flow table | |
90 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
91 | * by ovs_lock. | |
ccb1352e JG |
92 | * |
93 | * Reads are protected by RCU. | |
94 | * | |
95 | * There are a few special cases (mostly stats) that have their own | |
96 | * synchronization but they nest under all of above and don't interact with | |
97 | * each other. | |
8e4e1713 PS |
98 | * |
99 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
100 | */ |
101 | ||
8e4e1713 PS |
102 | static DEFINE_MUTEX(ovs_mutex); |
103 | ||
104 | void ovs_lock(void) | |
105 | { | |
106 | mutex_lock(&ovs_mutex); | |
107 | } | |
108 | ||
109 | void ovs_unlock(void) | |
110 | { | |
111 | mutex_unlock(&ovs_mutex); | |
112 | } | |
113 | ||
114 | #ifdef CONFIG_LOCKDEP | |
115 | int lockdep_ovsl_is_held(void) | |
116 | { | |
117 | if (debug_locks) | |
118 | return lockdep_is_held(&ovs_mutex); | |
119 | else | |
120 | return 1; | |
121 | } | |
122 | #endif | |
123 | ||
ccb1352e | 124 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 125 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 126 | const struct sw_flow_key *, |
f2a4d086 WT |
127 | const struct dp_upcall_info *, |
128 | uint32_t cutlen); | |
8055a89c | 129 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 130 | const struct sw_flow_key *, |
f2a4d086 WT |
131 | const struct dp_upcall_info *, |
132 | uint32_t cutlen); | |
ccb1352e | 133 | |
eac87c41 EC |
134 | static void ovs_dp_masks_rebalance(struct work_struct *work); |
135 | ||
b83d23a2 MG |
136 | static int ovs_dp_set_upcall_portids(struct datapath *, const struct nlattr *); |
137 | ||
8e4e1713 | 138 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 139 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 140 | { |
8e4e1713 | 141 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 142 | return ovs_vport_name(vport); |
ccb1352e JG |
143 | } |
144 | ||
12eb18f7 | 145 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
146 | { |
147 | struct vport *local; | |
148 | int ifindex; | |
149 | ||
150 | rcu_read_lock(); | |
151 | ||
15eac2a7 | 152 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 153 | if (local) |
be4ace6e | 154 | ifindex = local->dev->ifindex; |
ccb1352e JG |
155 | else |
156 | ifindex = 0; | |
157 | ||
158 | rcu_read_unlock(); | |
159 | ||
160 | return ifindex; | |
161 | } | |
162 | ||
163 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
164 | { | |
165 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
166 | ||
9b996e54 | 167 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 168 | free_percpu(dp->stats_percpu); |
15eac2a7 | 169 | kfree(dp->ports); |
96fbc13d | 170 | ovs_meters_exit(dp); |
076999e4 | 171 | kfree(rcu_dereference_raw(dp->upcall_portids)); |
ccb1352e JG |
172 | kfree(dp); |
173 | } | |
174 | ||
15eac2a7 PS |
175 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
176 | u16 port_no) | |
177 | { | |
178 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
179 | } | |
180 | ||
bb6f9a70 | 181 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
182 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
183 | { | |
184 | struct vport *vport; | |
15eac2a7 PS |
185 | struct hlist_head *head; |
186 | ||
187 | head = vport_hash_bucket(dp, port_no); | |
53742e69 | 188 | hlist_for_each_entry_rcu(vport, head, dp_hash_node, |
cf3266ad | 189 | lockdep_ovsl_is_held()) { |
15eac2a7 PS |
190 | if (vport->port_no == port_no) |
191 | return vport; | |
192 | } | |
193 | return NULL; | |
194 | } | |
195 | ||
8e4e1713 | 196 | /* Called with ovs_mutex. */ |
ccb1352e JG |
197 | static struct vport *new_vport(const struct vport_parms *parms) |
198 | { | |
199 | struct vport *vport; | |
200 | ||
201 | vport = ovs_vport_add(parms); | |
202 | if (!IS_ERR(vport)) { | |
203 | struct datapath *dp = parms->dp; | |
15eac2a7 | 204 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 205 | |
15eac2a7 | 206 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 207 | } |
ccb1352e JG |
208 | return vport; |
209 | } | |
210 | ||
ccb1352e JG |
211 | void ovs_dp_detach_port(struct vport *p) |
212 | { | |
8e4e1713 | 213 | ASSERT_OVSL(); |
ccb1352e JG |
214 | |
215 | /* First drop references to device. */ | |
15eac2a7 | 216 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
217 | |
218 | /* Then destroy it. */ | |
219 | ovs_vport_del(p); | |
220 | } | |
221 | ||
222 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 223 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 224 | { |
83c8df26 | 225 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
226 | struct datapath *dp = p->dp; |
227 | struct sw_flow *flow; | |
d98612b8 | 228 | struct sw_flow_actions *sf_acts; |
ccb1352e | 229 | struct dp_stats_percpu *stats; |
ccb1352e | 230 | u64 *stats_counter; |
1bd7116f | 231 | u32 n_mask_hit; |
9d2f627b | 232 | u32 n_cache_hit; |
aa733660 | 233 | int error; |
ccb1352e | 234 | |
404f2f10 | 235 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 236 | |
ccb1352e | 237 | /* Look up flow. */ |
04b7d136 | 238 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
9d2f627b | 239 | &n_mask_hit, &n_cache_hit); |
ccb1352e JG |
240 | if (unlikely(!flow)) { |
241 | struct dp_upcall_info upcall; | |
242 | ||
ccea7445 | 243 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 244 | upcall.cmd = OVS_PACKET_CMD_MISS; |
b83d23a2 MG |
245 | |
246 | if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU) | |
784dcfa5 MG |
247 | upcall.portid = |
248 | ovs_dp_get_upcall_portid(dp, smp_processor_id()); | |
b83d23a2 MG |
249 | else |
250 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); | |
251 | ||
7f8a436e | 252 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 253 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
254 | if (unlikely(error)) |
255 | kfree_skb(skb); | |
256 | else | |
257 | consume_skb(skb); | |
ccb1352e JG |
258 | stats_counter = &stats->n_missed; |
259 | goto out; | |
260 | } | |
261 | ||
d98612b8 LJ |
262 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
263 | sf_acts = rcu_dereference(flow->sf_acts); | |
aa733660 YS |
264 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
265 | if (unlikely(error)) | |
266 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
cf3266ad | 267 | ovs_dp_name(dp), error); |
ccb1352e | 268 | |
e298e505 | 269 | stats_counter = &stats->n_hit; |
ccb1352e JG |
270 | |
271 | out: | |
272 | /* Update datapath statistics. */ | |
df9d9fdf | 273 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 274 | (*stats_counter)++; |
1bd7116f | 275 | stats->n_mask_hit += n_mask_hit; |
9d2f627b | 276 | stats->n_cache_hit += n_cache_hit; |
df9d9fdf | 277 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
278 | } |
279 | ||
ccb1352e | 280 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 281 | const struct sw_flow_key *key, |
f2a4d086 WT |
282 | const struct dp_upcall_info *upcall_info, |
283 | uint32_t cutlen) | |
ccb1352e JG |
284 | { |
285 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
286 | int err; |
287 | ||
c4ab7b56 AC |
288 | if (trace_ovs_dp_upcall_enabled()) |
289 | trace_ovs_dp_upcall(dp, skb, key, upcall_info); | |
290 | ||
15e47304 | 291 | if (upcall_info->portid == 0) { |
ccb1352e JG |
292 | err = -ENOTCONN; |
293 | goto err; | |
294 | } | |
295 | ||
ccb1352e | 296 | if (!skb_is_gso(skb)) |
f2a4d086 | 297 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 298 | else |
f2a4d086 | 299 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
304 | ||
305 | err: | |
404f2f10 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 307 | |
df9d9fdf | 308 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 309 | stats->n_lost++; |
df9d9fdf | 310 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
311 | |
312 | return err; | |
313 | } | |
314 | ||
8055a89c | 315 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 316 | const struct sw_flow_key *key, |
f2a4d086 | 317 | const struct dp_upcall_info *upcall_info, |
cf3266ad | 318 | uint32_t cutlen) |
ccb1352e | 319 | { |
2734166e | 320 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 321 | struct sw_flow_key later_key; |
ccb1352e JG |
322 | struct sk_buff *segs, *nskb; |
323 | int err; | |
324 | ||
a08e7fd9 | 325 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_GSO_CB_OFFSET); |
09c5e605 | 326 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
327 | if (IS_ERR(segs)) |
328 | return PTR_ERR(segs); | |
330966e5 FW |
329 | if (segs == NULL) |
330 | return -EINVAL; | |
ccb1352e | 331 | |
0c19f846 WB |
332 | if (gso_type & SKB_GSO_UDP) { |
333 | /* The initial flow key extracted by ovs_flow_key_extract() | |
334 | * in this case is for a first fragment, so we need to | |
335 | * properly mark later fragments. | |
336 | */ | |
337 | later_key = *key; | |
338 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
339 | } | |
340 | ||
ccb1352e | 341 | /* Queue all of the segments. */ |
2cec4448 | 342 | skb_list_walk_safe(segs, skb, nskb) { |
0c19f846 WB |
343 | if (gso_type & SKB_GSO_UDP && skb != segs) |
344 | key = &later_key; | |
345 | ||
f2a4d086 | 346 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
347 | if (err) |
348 | break; | |
349 | ||
2cec4448 | 350 | } |
ccb1352e JG |
351 | |
352 | /* Free all of the segments. */ | |
2cec4448 | 353 | skb_list_walk_safe(segs, skb, nskb) { |
ccb1352e JG |
354 | if (err) |
355 | kfree_skb(skb); | |
356 | else | |
357 | consume_skb(skb); | |
2cec4448 | 358 | } |
ccb1352e JG |
359 | return err; |
360 | } | |
361 | ||
8f0aad6f | 362 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 363 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
364 | { |
365 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 366 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 | 367 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
bd1903b7 TZ |
368 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ |
369 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
c3ff8cfe TG |
370 | |
371 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
372 | if (upcall_info->userdata) |
373 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
374 | ||
375 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
376 | if (upcall_info->egress_tun_info) | |
377 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 378 | |
ccea7445 NM |
379 | /* OVS_PACKET_ATTR_ACTIONS */ |
380 | if (upcall_info->actions_len) | |
494bea39 | 381 | size += nla_total_size(actions_attrlen); |
ccea7445 | 382 | |
7f8a436e JS |
383 | /* OVS_PACKET_ATTR_MRU */ |
384 | if (upcall_info->mru) | |
385 | size += nla_total_size(sizeof(upcall_info->mru)); | |
386 | ||
c3ff8cfe TG |
387 | return size; |
388 | } | |
389 | ||
7f8a436e JS |
390 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
391 | { | |
392 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
393 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
394 | ||
395 | if (plen > 0) | |
b080db58 | 396 | skb_put_zero(skb, plen); |
7f8a436e JS |
397 | } |
398 | } | |
399 | ||
8055a89c | 400 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 401 | const struct sw_flow_key *key, |
f2a4d086 WT |
402 | const struct dp_upcall_info *upcall_info, |
403 | uint32_t cutlen) | |
ccb1352e JG |
404 | { |
405 | struct ovs_header *upcall; | |
406 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 407 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 408 | struct nlattr *nla; |
795449d8 | 409 | size_t len; |
bda56f14 | 410 | unsigned int hlen; |
8055a89c | 411 | int err, dp_ifindex; |
bd1903b7 | 412 | u64 hash; |
8055a89c TG |
413 | |
414 | dp_ifindex = get_dpifindex(dp); | |
415 | if (!dp_ifindex) | |
416 | return -ENODEV; | |
ccb1352e | 417 | |
df8a39de | 418 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
419 | nskb = skb_clone(skb, GFP_ATOMIC); |
420 | if (!nskb) | |
421 | return -ENOMEM; | |
422 | ||
5968250c | 423 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 424 | if (!nskb) |
ccb1352e JG |
425 | return -ENOMEM; |
426 | ||
ccb1352e JG |
427 | skb = nskb; |
428 | } | |
429 | ||
430 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
431 | err = -EFBIG; | |
432 | goto out; | |
433 | } | |
434 | ||
bda56f14 TG |
435 | /* Complete checksum if needed */ |
436 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 437 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
438 | goto out; |
439 | ||
440 | /* Older versions of OVS user space enforce alignment of the last | |
441 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
442 | * padding logic. Only perform zerocopy if padding is not required. | |
443 | */ | |
444 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
445 | hlen = skb_zerocopy_headlen(skb); | |
446 | else | |
447 | hlen = skb->len; | |
448 | ||
494bea39 LZ |
449 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
450 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 451 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
452 | if (!user_skb) { |
453 | err = -ENOMEM; | |
454 | goto out; | |
455 | } | |
456 | ||
457 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
458 | 0, upcall_info->cmd); | |
6f19893b KL |
459 | if (!upcall) { |
460 | err = -EINVAL; | |
461 | goto out; | |
462 | } | |
ccb1352e JG |
463 | upcall->dp_ifindex = dp_ifindex; |
464 | ||
5b4237bb | 465 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
466 | if (err) |
467 | goto out; | |
ccb1352e JG |
468 | |
469 | if (upcall_info->userdata) | |
4490108b BP |
470 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
471 | nla_len(upcall_info->userdata), | |
472 | nla_data(upcall_info->userdata)); | |
ccb1352e | 473 | |
8f0aad6f | 474 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
475 | nla = nla_nest_start_noflag(user_skb, |
476 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
477 | if (!nla) { |
478 | err = -EMSGSIZE; | |
479 | goto out; | |
480 | } | |
fc4099f1 PS |
481 | err = ovs_nla_put_tunnel_info(user_skb, |
482 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
483 | if (err) |
484 | goto out; | |
485 | ||
8f0aad6f WZ |
486 | nla_nest_end(user_skb, nla); |
487 | } | |
488 | ||
ccea7445 | 489 | if (upcall_info->actions_len) { |
ae0be8de | 490 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
491 | if (!nla) { |
492 | err = -EMSGSIZE; | |
493 | goto out; | |
494 | } | |
ccea7445 NM |
495 | err = ovs_nla_put_actions(upcall_info->actions, |
496 | upcall_info->actions_len, | |
497 | user_skb); | |
498 | if (!err) | |
499 | nla_nest_end(user_skb, nla); | |
500 | else | |
501 | nla_nest_cancel(user_skb, nla); | |
502 | } | |
503 | ||
7f8a436e | 504 | /* Add OVS_PACKET_ATTR_MRU */ |
61ca533c TZ |
505 | if (upcall_info->mru && |
506 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
507 | err = -ENOBUFS; | |
508 | goto out; | |
7f8a436e JS |
509 | } |
510 | ||
b95e5928 | 511 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
61ca533c TZ |
512 | if (cutlen > 0 && |
513 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
514 | err = -ENOBUFS; | |
515 | goto out; | |
b95e5928 WT |
516 | } |
517 | ||
bd1903b7 TZ |
518 | /* Add OVS_PACKET_ATTR_HASH */ |
519 | hash = skb_get_hash_raw(skb); | |
520 | if (skb->sw_hash) | |
521 | hash |= OVS_PACKET_HASH_SW_BIT; | |
522 | ||
523 | if (skb->l4_hash) | |
524 | hash |= OVS_PACKET_HASH_L4_BIT; | |
525 | ||
526 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
527 | err = -ENOBUFS; | |
528 | goto out; | |
529 | } | |
530 | ||
bda56f14 TG |
531 | /* Only reserve room for attribute header, packet data is added |
532 | * in skb_zerocopy() */ | |
533 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
534 | err = -ENOBUFS; | |
535 | goto out; | |
536 | } | |
f2a4d086 | 537 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 538 | |
f2a4d086 | 539 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
540 | if (err) |
541 | goto out; | |
ccb1352e | 542 | |
aea0bb4f | 543 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 544 | pad_packet(dp, user_skb); |
aea0bb4f | 545 | |
bda56f14 | 546 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 547 | |
bda56f14 | 548 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 549 | user_skb = NULL; |
ccb1352e | 550 | out: |
36d5fe6a ZK |
551 | if (err) |
552 | skb_tx_error(skb); | |
4ee45ea0 | 553 | kfree_skb(user_skb); |
ccb1352e JG |
554 | kfree_skb(nskb); |
555 | return err; | |
556 | } | |
557 | ||
ccb1352e JG |
558 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
559 | { | |
560 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 561 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
562 | struct nlattr **a = info->attrs; |
563 | struct sw_flow_actions *acts; | |
564 | struct sk_buff *packet; | |
565 | struct sw_flow *flow; | |
d98612b8 | 566 | struct sw_flow_actions *sf_acts; |
ccb1352e | 567 | struct datapath *dp; |
83c8df26 | 568 | struct vport *input_vport; |
7f8a436e | 569 | u16 mru = 0; |
bd1903b7 | 570 | u64 hash; |
ccb1352e JG |
571 | int len; |
572 | int err; | |
1ba39804 | 573 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
574 | |
575 | err = -EINVAL; | |
576 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 577 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
578 | goto err; |
579 | ||
580 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
581 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
582 | err = -ENOMEM; | |
583 | if (!packet) | |
584 | goto err; | |
585 | skb_reserve(packet, NET_IP_ALIGN); | |
586 | ||
32686a9d | 587 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 588 | |
7f8a436e JS |
589 | /* Set packet's mru */ |
590 | if (a[OVS_PACKET_ATTR_MRU]) { | |
591 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
592 | packet->ignore_df = 1; | |
593 | } | |
594 | OVS_CB(packet)->mru = mru; | |
595 | ||
bd1903b7 TZ |
596 | if (a[OVS_PACKET_ATTR_HASH]) { |
597 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
598 | ||
599 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
600 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
601 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
602 | } | |
603 | ||
ccb1352e | 604 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 605 | flow = ovs_flow_alloc(); |
ccb1352e JG |
606 | err = PTR_ERR(flow); |
607 | if (IS_ERR(flow)) | |
608 | goto err_kfree_skb; | |
609 | ||
c2ac6673 JS |
610 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
611 | packet, &flow->key, log); | |
ccb1352e JG |
612 | if (err) |
613 | goto err_flow_free; | |
614 | ||
7f8a436e | 615 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 616 | &flow->key, &acts, log); |
74f84a57 PS |
617 | if (err) |
618 | goto err_flow_free; | |
ccb1352e | 619 | |
f5796684 | 620 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 621 | packet->priority = flow->key.phy.priority; |
39c7caeb | 622 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
623 | |
624 | rcu_read_lock(); | |
7f8a436e | 625 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
626 | err = -ENODEV; |
627 | if (!dp) | |
628 | goto err_unlock; | |
629 | ||
83c8df26 PS |
630 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
631 | if (!input_vport) | |
632 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
633 | ||
634 | if (!input_vport) | |
635 | goto err_unlock; | |
636 | ||
7f8a436e | 637 | packet->dev = input_vport->dev; |
83c8df26 | 638 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 639 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 640 | |
ccb1352e | 641 | local_bh_disable(); |
d98612b8 | 642 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
643 | local_bh_enable(); |
644 | rcu_read_unlock(); | |
645 | ||
03f0d916 | 646 | ovs_flow_free(flow, false); |
ccb1352e JG |
647 | return err; |
648 | ||
649 | err_unlock: | |
650 | rcu_read_unlock(); | |
651 | err_flow_free: | |
03f0d916 | 652 | ovs_flow_free(flow, false); |
ccb1352e JG |
653 | err_kfree_skb: |
654 | kfree_skb(packet); | |
655 | err: | |
656 | return err; | |
657 | } | |
658 | ||
659 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 660 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
661 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
662 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 663 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 664 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
b5ab1f1b | 665 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, |
ccb1352e JG |
666 | }; |
667 | ||
66a9b928 | 668 | static const struct genl_small_ops dp_packet_genl_ops[] = { |
ccb1352e | 669 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 670 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 671 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
672 | .doit = ovs_packet_cmd_execute |
673 | } | |
674 | }; | |
675 | ||
56989f6d | 676 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
677 | .hdrsize = sizeof(struct ovs_header), |
678 | .name = OVS_PACKET_FAMILY, | |
679 | .version = OVS_PACKET_VERSION, | |
680 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 681 | .policy = packet_policy, |
0c200ef9 PS |
682 | .netnsok = true, |
683 | .parallel_ops = true, | |
66a9b928 JK |
684 | .small_ops = dp_packet_genl_ops, |
685 | .n_small_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 686 | .module = THIS_MODULE, |
0c200ef9 PS |
687 | }; |
688 | ||
12eb18f7 | 689 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 690 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
691 | { |
692 | int i; | |
ccb1352e | 693 | |
1bd7116f AZ |
694 | memset(mega_stats, 0, sizeof(*mega_stats)); |
695 | ||
b637e498 | 696 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 697 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
698 | |
699 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 700 | |
ccb1352e JG |
701 | for_each_possible_cpu(i) { |
702 | const struct dp_stats_percpu *percpu_stats; | |
703 | struct dp_stats_percpu local_stats; | |
704 | unsigned int start; | |
705 | ||
706 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
707 | ||
708 | do { | |
57a7744e | 709 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 710 | local_stats = *percpu_stats; |
57a7744e | 711 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
712 | |
713 | stats->n_hit += local_stats.n_hit; | |
714 | stats->n_missed += local_stats.n_missed; | |
715 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 716 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
9d2f627b | 717 | mega_stats->n_cache_hit += local_stats.n_cache_hit; |
ccb1352e JG |
718 | } |
719 | } | |
720 | ||
74ed7ab9 JS |
721 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
722 | { | |
723 | return ovs_identifier_is_ufid(sfid) && | |
724 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
725 | } | |
726 | ||
727 | static bool should_fill_mask(uint32_t ufid_flags) | |
728 | { | |
729 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
730 | } | |
731 | ||
732 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 733 | { |
74ed7ab9 JS |
734 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
735 | } | |
736 | ||
737 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
738 | const struct sw_flow_id *sfid, | |
739 | uint32_t ufid_flags) | |
740 | { | |
741 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
742 | ||
4e81c0b3 PA |
743 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback |
744 | * see ovs_nla_put_identifier() | |
745 | */ | |
74ed7ab9 JS |
746 | if (sfid && ovs_identifier_is_ufid(sfid)) |
747 | len += nla_total_size(sfid->ufid_len); | |
4e81c0b3 PA |
748 | else |
749 | len += nla_total_size(ovs_key_attr_size()); | |
74ed7ab9 JS |
750 | |
751 | /* OVS_FLOW_ATTR_KEY */ | |
752 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
753 | len += nla_total_size(ovs_key_attr_size()); | |
754 | ||
755 | /* OVS_FLOW_ATTR_MASK */ | |
756 | if (should_fill_mask(ufid_flags)) | |
757 | len += nla_total_size(ovs_key_attr_size()); | |
758 | ||
759 | /* OVS_FLOW_ATTR_ACTIONS */ | |
760 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 761 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
762 | |
763 | return len | |
66c7a5ee | 764 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 765 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 766 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
767 | } |
768 | ||
ca7105f2 JS |
769 | /* Called with ovs_mutex or RCU read lock. */ |
770 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
771 | struct sk_buff *skb) | |
772 | { | |
773 | struct ovs_flow_stats stats; | |
774 | __be16 tcp_flags; | |
775 | unsigned long used; | |
ccb1352e | 776 | |
e298e505 | 777 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 778 | |
028d6a67 | 779 | if (used && |
0238b720 ND |
780 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
781 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 782 | return -EMSGSIZE; |
ccb1352e | 783 | |
028d6a67 | 784 | if (stats.n_packets && |
66c7a5ee ND |
785 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
786 | sizeof(struct ovs_flow_stats), &stats, | |
787 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 788 | return -EMSGSIZE; |
ccb1352e | 789 | |
e298e505 PS |
790 | if ((u8)ntohs(tcp_flags) && |
791 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
792 | return -EMSGSIZE; |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | /* Called with ovs_mutex or RCU read lock. */ | |
798 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
799 | struct sk_buff *skb, int skb_orig_len) | |
800 | { | |
801 | struct nlattr *start; | |
802 | int err; | |
ccb1352e JG |
803 | |
804 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
805 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
806 | * Netlink but individual action lists can be longer than | |
807 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
808 | * The userspace caller can always fetch the actions separately if it | |
809 | * really wants them. (Most userspace callers in fact don't care.) | |
810 | * | |
811 | * This can only fail for dump operations because the skb is always | |
812 | * properly sized for single flows. | |
813 | */ | |
ae0be8de | 814 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 815 | if (start) { |
d57170b1 PS |
816 | const struct sw_flow_actions *sf_acts; |
817 | ||
663efa36 | 818 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
819 | err = ovs_nla_put_actions(sf_acts->actions, |
820 | sf_acts->actions_len, skb); | |
0e9796b4 | 821 | |
74f84a57 PS |
822 | if (!err) |
823 | nla_nest_end(skb, start); | |
824 | else { | |
825 | if (skb_orig_len) | |
ca7105f2 | 826 | return err; |
74f84a57 PS |
827 | |
828 | nla_nest_cancel(skb, start); | |
829 | } | |
ca7105f2 JS |
830 | } else if (skb_orig_len) { |
831 | return -EMSGSIZE; | |
832 | } | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | /* Called with ovs_mutex or RCU read lock. */ | |
838 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
839 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 840 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
841 | { |
842 | const int skb_orig_len = skb->len; | |
843 | struct ovs_header *ovs_header; | |
844 | int err; | |
845 | ||
846 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
847 | flags, cmd); | |
848 | if (!ovs_header) | |
849 | return -EMSGSIZE; | |
850 | ||
851 | ovs_header->dp_ifindex = dp_ifindex; | |
852 | ||
74ed7ab9 | 853 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
854 | if (err) |
855 | goto error; | |
856 | ||
74ed7ab9 JS |
857 | if (should_fill_key(&flow->id, ufid_flags)) { |
858 | err = ovs_nla_put_masked_key(flow, skb); | |
859 | if (err) | |
860 | goto error; | |
861 | } | |
862 | ||
863 | if (should_fill_mask(ufid_flags)) { | |
864 | err = ovs_nla_put_mask(flow, skb); | |
865 | if (err) | |
866 | goto error; | |
867 | } | |
ca7105f2 JS |
868 | |
869 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
870 | if (err) | |
871 | goto error; | |
872 | ||
74ed7ab9 JS |
873 | if (should_fill_actions(ufid_flags)) { |
874 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
875 | if (err) | |
876 | goto error; | |
877 | } | |
ccb1352e | 878 | |
053c095a JB |
879 | genlmsg_end(skb, ovs_header); |
880 | return 0; | |
ccb1352e | 881 | |
ccb1352e JG |
882 | error: |
883 | genlmsg_cancel(skb, ovs_header); | |
884 | return err; | |
885 | } | |
886 | ||
0e9796b4 JR |
887 | /* May not be called with RCU read lock. */ |
888 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 889 | const struct sw_flow_id *sfid, |
fb5d1e9e | 890 | struct genl_info *info, |
74ed7ab9 JS |
891 | bool always, |
892 | uint32_t ufid_flags) | |
ccb1352e | 893 | { |
fb5d1e9e | 894 | struct sk_buff *skb; |
74ed7ab9 | 895 | size_t len; |
ccb1352e | 896 | |
9b67aa4a | 897 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
898 | return NULL; |
899 | ||
74ed7ab9 | 900 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 901 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
902 | if (!skb) |
903 | return ERR_PTR(-ENOMEM); | |
904 | ||
905 | return skb; | |
ccb1352e JG |
906 | } |
907 | ||
0e9796b4 JR |
908 | /* Called with ovs_mutex. */ |
909 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
910 | int dp_ifindex, | |
911 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 912 | bool always, u32 ufid_flags) |
ccb1352e JG |
913 | { |
914 | struct sk_buff *skb; | |
915 | int retval; | |
916 | ||
74ed7ab9 JS |
917 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
918 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 919 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 920 | return skb; |
ccb1352e | 921 | |
0e9796b4 JR |
922 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
923 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 924 | cmd, ufid_flags); |
8ffeb03f PA |
925 | if (WARN_ON_ONCE(retval < 0)) { |
926 | kfree_skb(skb); | |
927 | skb = ERR_PTR(retval); | |
928 | } | |
ccb1352e JG |
929 | return skb; |
930 | } | |
931 | ||
37bdc87b | 932 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 933 | { |
7f8a436e | 934 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
935 | struct nlattr **a = info->attrs; |
936 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 937 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 938 | struct sw_flow_mask mask; |
ccb1352e JG |
939 | struct sk_buff *reply; |
940 | struct datapath *dp; | |
37bdc87b | 941 | struct sw_flow_actions *acts; |
03f0d916 | 942 | struct sw_flow_match match; |
74ed7ab9 | 943 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 944 | int error; |
05da5898 | 945 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 946 | |
893f139b | 947 | /* Must have key and actions. */ |
ccb1352e | 948 | error = -EINVAL; |
426cda5c | 949 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 950 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 951 | goto error; |
426cda5c JG |
952 | } |
953 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 954 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 955 | goto error; |
426cda5c | 956 | } |
03f0d916 | 957 | |
893f139b JR |
958 | /* Most of the time we need to allocate a new flow, do it before |
959 | * locking. | |
960 | */ | |
961 | new_flow = ovs_flow_alloc(); | |
962 | if (IS_ERR(new_flow)) { | |
963 | error = PTR_ERR(new_flow); | |
964 | goto error; | |
965 | } | |
966 | ||
967 | /* Extract key. */ | |
2279994d | 968 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 969 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 970 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 971 | if (error) |
893f139b | 972 | goto err_kfree_flow; |
ccb1352e | 973 | |
74ed7ab9 JS |
974 | /* Extract flow identifier. */ |
975 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 976 | &new_flow->key, log); |
74ed7ab9 JS |
977 | if (error) |
978 | goto err_kfree_flow; | |
74f84a57 | 979 | |
190aa3e7 | 980 | /* unmasked key is needed to match when ufid is not used. */ |
981 | if (ovs_identifier_is_key(&new_flow->id)) | |
982 | match.key = new_flow->id.unmasked_key; | |
983 | ||
984 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
985 | ||
893f139b | 986 | /* Validate actions. */ |
7f8a436e JS |
987 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
988 | &new_flow->key, &acts, log); | |
37bdc87b | 989 | if (error) { |
05da5898 | 990 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 991 | goto err_kfree_flow; |
893f139b JR |
992 | } |
993 | ||
74ed7ab9 JS |
994 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
995 | ufid_flags); | |
893f139b JR |
996 | if (IS_ERR(reply)) { |
997 | error = PTR_ERR(reply); | |
998 | goto err_kfree_acts; | |
ccb1352e JG |
999 | } |
1000 | ||
8e4e1713 | 1001 | ovs_lock(); |
7f8a436e | 1002 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1003 | if (unlikely(!dp)) { |
1004 | error = -ENODEV; | |
8e4e1713 | 1005 | goto err_unlock_ovs; |
893f139b | 1006 | } |
74ed7ab9 | 1007 | |
03f0d916 | 1008 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
1009 | if (ovs_identifier_is_ufid(&new_flow->id)) |
1010 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
1011 | if (!flow) | |
190aa3e7 | 1012 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
1013 | if (likely(!flow)) { |
1014 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
1015 | |
1016 | /* Put flow in bucket. */ | |
893f139b JR |
1017 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1018 | if (unlikely(error)) { | |
618ed0c8 | 1019 | acts = NULL; |
893f139b JR |
1020 | goto err_unlock_ovs; |
1021 | } | |
1022 | ||
1023 | if (unlikely(reply)) { | |
1024 | error = ovs_flow_cmd_fill_info(new_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 | 1030 | BUG_ON(error < 0); |
618ed0c8 | 1031 | } |
893f139b | 1032 | ovs_unlock(); |
ccb1352e | 1033 | } else { |
37bdc87b JR |
1034 | struct sw_flow_actions *old_acts; |
1035 | ||
ccb1352e JG |
1036 | /* Bail out if we're not allowed to modify an existing flow. |
1037 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1038 | * because Generic Netlink treats the latter as a dump | |
1039 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1040 | * gets fixed. | |
1041 | */ | |
893f139b JR |
1042 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1043 | | NLM_F_EXCL))) { | |
1044 | error = -EEXIST; | |
8e4e1713 | 1045 | goto err_unlock_ovs; |
893f139b | 1046 | } |
74ed7ab9 JS |
1047 | /* The flow identifier has to be the same for flow updates. |
1048 | * Look for any overlapping flow. | |
1049 | */ | |
1050 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1051 | if (ovs_identifier_is_key(&flow->id)) | |
1052 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1053 | &match); | |
1054 | else /* UFID matches but key is different */ | |
1055 | flow = NULL; | |
4a46b24e AW |
1056 | if (!flow) { |
1057 | error = -ENOENT; | |
1058 | goto err_unlock_ovs; | |
1059 | } | |
893f139b | 1060 | } |
37bdc87b JR |
1061 | /* Update actions. */ |
1062 | old_acts = ovsl_dereference(flow->sf_acts); | |
1063 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1064 | |
893f139b JR |
1065 | if (unlikely(reply)) { |
1066 | error = ovs_flow_cmd_fill_info(flow, | |
1067 | ovs_header->dp_ifindex, | |
1068 | reply, info->snd_portid, | |
1069 | info->snd_seq, 0, | |
74ed7ab9 JS |
1070 | OVS_FLOW_CMD_NEW, |
1071 | ufid_flags); | |
893f139b JR |
1072 | BUG_ON(error < 0); |
1073 | } | |
1074 | ovs_unlock(); | |
37bdc87b | 1075 | |
34ae932a | 1076 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1077 | ovs_flow_free(new_flow, false); |
37bdc87b | 1078 | } |
893f139b JR |
1079 | |
1080 | if (reply) | |
1081 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1082 | return 0; |
1083 | ||
37bdc87b JR |
1084 | err_unlock_ovs: |
1085 | ovs_unlock(); | |
893f139b JR |
1086 | kfree_skb(reply); |
1087 | err_kfree_acts: | |
34ae932a | 1088 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1089 | err_kfree_flow: |
1090 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1091 | error: |
1092 | return error; | |
1093 | } | |
ccb1352e | 1094 | |
2fdb957d | 1095 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
cf3266ad TZ |
1096 | static noinline_for_stack |
1097 | struct sw_flow_actions *get_flow_actions(struct net *net, | |
1098 | const struct nlattr *a, | |
1099 | const struct sw_flow_key *key, | |
1100 | const struct sw_flow_mask *mask, | |
1101 | bool log) | |
6b205b2c JG |
1102 | { |
1103 | struct sw_flow_actions *acts; | |
1104 | struct sw_flow_key masked_key; | |
1105 | int error; | |
1106 | ||
ae5f2fb1 | 1107 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1108 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1109 | if (error) { |
05da5898 JR |
1110 | OVS_NLERR(log, |
1111 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1112 | return ERR_PTR(error); |
1113 | } | |
1114 | ||
1115 | return acts; | |
1116 | } | |
1117 | ||
9cc9a5cb TZ |
1118 | /* Factor out match-init and action-copy to avoid |
1119 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1120 | * used to get actions, we new a function to save some | |
1121 | * stack space. | |
1122 | * | |
1123 | * If there are not key and action attrs, we return 0 | |
1124 | * directly. In the case, the caller will also not use the | |
1125 | * match as before. If there is action attr, we try to get | |
1126 | * actions and save them to *acts. Before returning from | |
1127 | * the function, we reset the match->mask pointer. Because | |
1128 | * we should not to return match object with dangling reference | |
1129 | * to mask. | |
1130 | * */ | |
26063790 AB |
1131 | static noinline_for_stack int |
1132 | ovs_nla_init_match_and_action(struct net *net, | |
1133 | struct sw_flow_match *match, | |
1134 | struct sw_flow_key *key, | |
1135 | struct nlattr **a, | |
1136 | struct sw_flow_actions **acts, | |
1137 | bool log) | |
9cc9a5cb TZ |
1138 | { |
1139 | struct sw_flow_mask mask; | |
1140 | int error = 0; | |
1141 | ||
1142 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1143 | ovs_match_init(match, key, true, &mask); | |
1144 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1145 | a[OVS_FLOW_ATTR_MASK], log); | |
1146 | if (error) | |
1147 | goto error; | |
1148 | } | |
1149 | ||
1150 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1151 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1152 | OVS_NLERR(log, | |
1153 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1154 | error = -EINVAL; |
1155 | goto error; | |
9cc9a5cb TZ |
1156 | } |
1157 | ||
1158 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1159 | &mask, log); | |
1160 | if (IS_ERR(*acts)) { | |
1161 | error = PTR_ERR(*acts); | |
1162 | goto error; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | /* On success, error is 0. */ | |
1167 | error: | |
1168 | match->mask = NULL; | |
1169 | return error; | |
1170 | } | |
1171 | ||
37bdc87b JR |
1172 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1173 | { | |
7f8a436e | 1174 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1175 | struct nlattr **a = info->attrs; |
1176 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1177 | struct sw_flow_key key; |
37bdc87b | 1178 | struct sw_flow *flow; |
37bdc87b JR |
1179 | struct sk_buff *reply = NULL; |
1180 | struct datapath *dp; | |
893f139b | 1181 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1182 | struct sw_flow_match match; |
74ed7ab9 JS |
1183 | struct sw_flow_id sfid; |
1184 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1185 | int error = 0; |
05da5898 | 1186 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1187 | bool ufid_present; |
37bdc87b | 1188 | |
74ed7ab9 | 1189 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1190 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1191 | OVS_NLERR(log, |
1192 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1193 | return -EINVAL; |
6f15cdbf | 1194 | } |
9cc9a5cb TZ |
1195 | |
1196 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1197 | &acts, log); | |
37bdc87b JR |
1198 | if (error) |
1199 | goto error; | |
1200 | ||
9cc9a5cb | 1201 | if (acts) { |
2fdb957d | 1202 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1203 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1204 | ufid_flags); | |
893f139b JR |
1205 | if (IS_ERR(reply)) { |
1206 | error = PTR_ERR(reply); | |
1207 | goto err_kfree_acts; | |
be52c9e9 | 1208 | } |
37bdc87b | 1209 | } |
0e9796b4 | 1210 | |
37bdc87b | 1211 | ovs_lock(); |
7f8a436e | 1212 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1213 | if (unlikely(!dp)) { |
1214 | error = -ENODEV; | |
37bdc87b | 1215 | goto err_unlock_ovs; |
893f139b | 1216 | } |
37bdc87b | 1217 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1218 | if (ufid_present) |
1219 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1220 | else | |
1221 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1222 | if (unlikely(!flow)) { |
1223 | error = -ENOENT; | |
37bdc87b | 1224 | goto err_unlock_ovs; |
893f139b | 1225 | } |
4a46b24e | 1226 | |
37bdc87b | 1227 | /* Update actions, if present. */ |
893f139b | 1228 | if (likely(acts)) { |
37bdc87b JR |
1229 | old_acts = ovsl_dereference(flow->sf_acts); |
1230 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1231 | |
1232 | if (unlikely(reply)) { | |
1233 | error = ovs_flow_cmd_fill_info(flow, | |
1234 | ovs_header->dp_ifindex, | |
1235 | reply, info->snd_portid, | |
1236 | info->snd_seq, 0, | |
804fe108 | 1237 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1238 | ufid_flags); |
893f139b JR |
1239 | BUG_ON(error < 0); |
1240 | } | |
1241 | } else { | |
1242 | /* Could not alloc without acts before locking. */ | |
1243 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1244 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1245 | ufid_flags); |
1246 | ||
b5ffe634 | 1247 | if (IS_ERR(reply)) { |
893f139b JR |
1248 | error = PTR_ERR(reply); |
1249 | goto err_unlock_ovs; | |
1250 | } | |
ccb1352e | 1251 | } |
37bdc87b | 1252 | |
37bdc87b JR |
1253 | /* Clear stats. */ |
1254 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1255 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1256 | ovs_unlock(); |
ccb1352e | 1257 | |
893f139b JR |
1258 | if (reply) |
1259 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1260 | if (old_acts) | |
34ae932a | 1261 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1262 | |
ccb1352e JG |
1263 | return 0; |
1264 | ||
8e4e1713 PS |
1265 | err_unlock_ovs: |
1266 | ovs_unlock(); | |
893f139b JR |
1267 | kfree_skb(reply); |
1268 | err_kfree_acts: | |
34ae932a | 1269 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1270 | error: |
1271 | return error; | |
1272 | } | |
1273 | ||
1274 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1275 | { | |
1276 | struct nlattr **a = info->attrs; | |
1277 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1278 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1279 | struct sw_flow_key key; |
1280 | struct sk_buff *reply; | |
1281 | struct sw_flow *flow; | |
1282 | struct datapath *dp; | |
03f0d916 | 1283 | struct sw_flow_match match; |
74ed7ab9 JS |
1284 | struct sw_flow_id ufid; |
1285 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1286 | int err = 0; | |
05da5898 | 1287 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1288 | bool ufid_present; |
ccb1352e | 1289 | |
74ed7ab9 JS |
1290 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1291 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1292 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1293 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1294 | log); |
1295 | } else if (!ufid_present) { | |
05da5898 JR |
1296 | OVS_NLERR(log, |
1297 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1298 | err = -EINVAL; |
03f0d916 | 1299 | } |
ccb1352e JG |
1300 | if (err) |
1301 | return err; | |
1302 | ||
8e4e1713 | 1303 | ovs_lock(); |
46df7b81 | 1304 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1305 | if (!dp) { |
1306 | err = -ENODEV; | |
1307 | goto unlock; | |
1308 | } | |
ccb1352e | 1309 | |
74ed7ab9 JS |
1310 | if (ufid_present) |
1311 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1312 | else | |
1313 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1314 | if (!flow) { |
8e4e1713 PS |
1315 | err = -ENOENT; |
1316 | goto unlock; | |
1317 | } | |
ccb1352e | 1318 | |
0e9796b4 | 1319 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1320 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1321 | if (IS_ERR(reply)) { |
1322 | err = PTR_ERR(reply); | |
1323 | goto unlock; | |
1324 | } | |
ccb1352e | 1325 | |
8e4e1713 | 1326 | ovs_unlock(); |
ccb1352e | 1327 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1328 | unlock: |
1329 | ovs_unlock(); | |
1330 | return err; | |
ccb1352e JG |
1331 | } |
1332 | ||
1333 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1334 | { | |
1335 | struct nlattr **a = info->attrs; | |
1336 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1337 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1338 | struct sw_flow_key key; |
1339 | struct sk_buff *reply; | |
74ed7ab9 | 1340 | struct sw_flow *flow = NULL; |
ccb1352e | 1341 | struct datapath *dp; |
03f0d916 | 1342 | struct sw_flow_match match; |
74ed7ab9 JS |
1343 | struct sw_flow_id ufid; |
1344 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1345 | int err; |
05da5898 | 1346 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1347 | bool ufid_present; |
ccb1352e | 1348 | |
74ed7ab9 JS |
1349 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1350 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1351 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1352 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1353 | NULL, log); | |
aed06778 JR |
1354 | if (unlikely(err)) |
1355 | return err; | |
1356 | } | |
1357 | ||
8e4e1713 | 1358 | ovs_lock(); |
46df7b81 | 1359 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1360 | if (unlikely(!dp)) { |
8e4e1713 PS |
1361 | err = -ENODEV; |
1362 | goto unlock; | |
1363 | } | |
46df7b81 | 1364 | |
74ed7ab9 | 1365 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1366 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1367 | goto unlock; |
1368 | } | |
03f0d916 | 1369 | |
74ed7ab9 JS |
1370 | if (ufid_present) |
1371 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1372 | else | |
1373 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1374 | if (unlikely(!flow)) { |
8e4e1713 PS |
1375 | err = -ENOENT; |
1376 | goto unlock; | |
1377 | } | |
ccb1352e | 1378 | |
b637e498 | 1379 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1380 | ovs_unlock(); |
ccb1352e | 1381 | |
aed06778 | 1382 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1383 | &flow->id, info, false, ufid_flags); |
aed06778 | 1384 | if (likely(reply)) { |
b90f5aa4 | 1385 | if (!IS_ERR(reply)) { |
aed06778 JR |
1386 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1387 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1388 | reply, info->snd_portid, | |
1389 | info->snd_seq, 0, | |
74ed7ab9 JS |
1390 | OVS_FLOW_CMD_DEL, |
1391 | ufid_flags); | |
aed06778 | 1392 | rcu_read_unlock(); |
8a574f86 PA |
1393 | if (WARN_ON_ONCE(err < 0)) { |
1394 | kfree_skb(reply); | |
1395 | goto out_free; | |
1396 | } | |
aed06778 JR |
1397 | |
1398 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1399 | } else { | |
cf3266ad TZ |
1400 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, |
1401 | PTR_ERR(reply)); | |
aed06778 | 1402 | } |
fb5d1e9e | 1403 | } |
ccb1352e | 1404 | |
8a574f86 | 1405 | out_free: |
aed06778 | 1406 | ovs_flow_free(flow, true); |
ccb1352e | 1407 | return 0; |
8e4e1713 PS |
1408 | unlock: |
1409 | ovs_unlock(); | |
1410 | return err; | |
ccb1352e JG |
1411 | } |
1412 | ||
1413 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1414 | { | |
74ed7ab9 | 1415 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1416 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1417 | struct table_instance *ti; |
ccb1352e | 1418 | struct datapath *dp; |
74ed7ab9 JS |
1419 | u32 ufid_flags; |
1420 | int err; | |
1421 | ||
8cb08174 JB |
1422 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1423 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1424 | if (err) |
1425 | return err; | |
1426 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1427 | |
d57170b1 | 1428 | rcu_read_lock(); |
cc3a5ae6 | 1429 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1430 | if (!dp) { |
d57170b1 | 1431 | rcu_read_unlock(); |
ccb1352e | 1432 | return -ENODEV; |
8e4e1713 | 1433 | } |
ccb1352e | 1434 | |
b637e498 | 1435 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1436 | for (;;) { |
1437 | struct sw_flow *flow; | |
1438 | u32 bucket, obj; | |
1439 | ||
1440 | bucket = cb->args[0]; | |
1441 | obj = cb->args[1]; | |
b637e498 | 1442 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1443 | if (!flow) |
1444 | break; | |
1445 | ||
0e9796b4 | 1446 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1447 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1448 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1449 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1450 | break; |
1451 | ||
1452 | cb->args[0] = bucket; | |
1453 | cb->args[1] = obj; | |
1454 | } | |
d57170b1 | 1455 | rcu_read_unlock(); |
ccb1352e JG |
1456 | return skb->len; |
1457 | } | |
1458 | ||
0c200ef9 PS |
1459 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1460 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1461 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1462 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1463 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1464 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1465 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1466 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1467 | }; |
1468 | ||
66a9b928 | 1469 | static const struct genl_small_ops dp_flow_genl_ops[] = { |
ccb1352e | 1470 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1471 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1472 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1473 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1474 | }, |
1475 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1476 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1477 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1478 | .doit = ovs_flow_cmd_del |
1479 | }, | |
1480 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1481 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1482 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1483 | .doit = ovs_flow_cmd_get, |
1484 | .dumpit = ovs_flow_cmd_dump | |
1485 | }, | |
1486 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1487 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1488 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1489 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1490 | }, |
1491 | }; | |
1492 | ||
56989f6d | 1493 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1494 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1495 | .name = OVS_FLOW_FAMILY, |
1496 | .version = OVS_FLOW_VERSION, | |
1497 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1498 | .policy = flow_policy, |
3a4e0d6a PS |
1499 | .netnsok = true, |
1500 | .parallel_ops = true, | |
66a9b928 JK |
1501 | .small_ops = dp_flow_genl_ops, |
1502 | .n_small_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
0c200ef9 PS |
1503 | .mcgrps = &ovs_dp_flow_multicast_group, |
1504 | .n_mcgrps = 1, | |
489111e5 | 1505 | .module = THIS_MODULE, |
ccb1352e JG |
1506 | }; |
1507 | ||
c3ff8cfe TG |
1508 | static size_t ovs_dp_cmd_msg_size(void) |
1509 | { | |
1510 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1511 | ||
1512 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1513 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1514 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1515 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
9bf24f59 | 1516 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_MASKS_CACHE_SIZE */ |
c3ff8cfe TG |
1517 | |
1518 | return msgsize; | |
1519 | } | |
1520 | ||
8ec609d8 | 1521 | /* Called with ovs_mutex. */ |
ccb1352e | 1522 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1523 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1524 | { |
1525 | struct ovs_header *ovs_header; | |
1526 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1527 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1528 | int err; |
1529 | ||
15e47304 | 1530 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
cf3266ad | 1531 | flags, cmd); |
ccb1352e JG |
1532 | if (!ovs_header) |
1533 | goto error; | |
1534 | ||
1535 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1536 | ||
ccb1352e | 1537 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1538 | if (err) |
1539 | goto nla_put_failure; | |
1540 | ||
1bd7116f | 1541 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1542 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1543 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1544 | goto nla_put_failure; |
1545 | ||
66c7a5ee ND |
1546 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1547 | sizeof(struct ovs_dp_megaflow_stats), | |
1548 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1549 | goto nla_put_failure; |
ccb1352e | 1550 | |
43d4be9c TG |
1551 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1552 | goto nla_put_failure; | |
1553 | ||
9bf24f59 EC |
1554 | if (nla_put_u32(skb, OVS_DP_ATTR_MASKS_CACHE_SIZE, |
1555 | ovs_flow_tbl_masks_cache_size(&dp->table))) | |
1556 | goto nla_put_failure; | |
1557 | ||
053c095a JB |
1558 | genlmsg_end(skb, ovs_header); |
1559 | return 0; | |
ccb1352e JG |
1560 | |
1561 | nla_put_failure: | |
1562 | genlmsg_cancel(skb, ovs_header); | |
1563 | error: | |
1564 | return -EMSGSIZE; | |
1565 | } | |
1566 | ||
263ea090 | 1567 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1568 | { |
551ddc05 | 1569 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1570 | } |
1571 | ||
bb6f9a70 | 1572 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1573 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1574 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1575 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1576 | { | |
1577 | struct datapath *dp; | |
1578 | ||
1579 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1580 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1581 | else { |
1582 | struct vport *vport; | |
1583 | ||
46df7b81 | 1584 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1585 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1586 | } |
1587 | return dp ? dp : ERR_PTR(-ENODEV); | |
1588 | } | |
1589 | ||
cf3266ad TZ |
1590 | static void ovs_dp_reset_user_features(struct sk_buff *skb, |
1591 | struct genl_info *info) | |
44da5ae5 TG |
1592 | { |
1593 | struct datapath *dp; | |
1594 | ||
cf3266ad TZ |
1595 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, |
1596 | info->attrs); | |
3c7eacfc | 1597 | if (IS_ERR(dp)) |
44da5ae5 TG |
1598 | return; |
1599 | ||
1600 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1601 | dp->user_features = 0; | |
1602 | } | |
1603 | ||
95a7233c PB |
1604 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1605 | ||
b83d23a2 MG |
1606 | static int ovs_dp_set_upcall_portids(struct datapath *dp, |
1607 | const struct nlattr *ids) | |
1608 | { | |
1609 | struct dp_nlsk_pids *old, *dp_nlsk_pids; | |
1610 | ||
1611 | if (!nla_len(ids) || nla_len(ids) % sizeof(u32)) | |
1612 | return -EINVAL; | |
1613 | ||
1614 | old = ovsl_dereference(dp->upcall_portids); | |
1615 | ||
1616 | dp_nlsk_pids = kmalloc(sizeof(*dp_nlsk_pids) + nla_len(ids), | |
1617 | GFP_KERNEL); | |
1618 | if (!dp_nlsk_pids) | |
1619 | return -ENOMEM; | |
1620 | ||
1621 | dp_nlsk_pids->n_pids = nla_len(ids) / sizeof(u32); | |
1622 | nla_memcpy(dp_nlsk_pids->pids, ids, nla_len(ids)); | |
1623 | ||
1624 | rcu_assign_pointer(dp->upcall_portids, dp_nlsk_pids); | |
1625 | ||
1626 | kfree_rcu(old, rcu); | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | u32 ovs_dp_get_upcall_portid(const struct datapath *dp, uint32_t cpu_id) | |
1632 | { | |
1633 | struct dp_nlsk_pids *dp_nlsk_pids; | |
1634 | ||
1635 | dp_nlsk_pids = rcu_dereference(dp->upcall_portids); | |
1636 | ||
1637 | if (dp_nlsk_pids) { | |
1638 | if (cpu_id < dp_nlsk_pids->n_pids) { | |
1639 | return dp_nlsk_pids->pids[cpu_id]; | |
784dcfa5 MG |
1640 | } else if (dp_nlsk_pids->n_pids > 0 && |
1641 | cpu_id >= dp_nlsk_pids->n_pids) { | |
1642 | /* If the number of netlink PIDs is mismatched with | |
1643 | * the number of CPUs as seen by the kernel, log this | |
1644 | * and send the upcall to an arbitrary socket (0) in | |
1645 | * order to not drop packets | |
b83d23a2 MG |
1646 | */ |
1647 | pr_info_ratelimited("cpu_id mismatch with handler threads"); | |
784dcfa5 MG |
1648 | return dp_nlsk_pids->pids[cpu_id % |
1649 | dp_nlsk_pids->n_pids]; | |
b83d23a2 MG |
1650 | } else { |
1651 | return 0; | |
1652 | } | |
1653 | } else { | |
1654 | return 0; | |
1655 | } | |
1656 | } | |
1657 | ||
95a7233c | 1658 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c | 1659 | { |
95a7233c | 1660 | u32 user_features = 0; |
b83d23a2 | 1661 | int err; |
95a7233c PB |
1662 | |
1663 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1664 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1665 | ||
1666 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1667 | OVS_DP_F_UNALIGNED | | |
b83d23a2 MG |
1668 | OVS_DP_F_TC_RECIRC_SHARING | |
1669 | OVS_DP_F_DISPATCH_UPCALL_PER_CPU)) | |
95a7233c PB |
1670 | return -EOPNOTSUPP; |
1671 | ||
1672 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1673 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1674 | return -EOPNOTSUPP; | |
1675 | #endif | |
1676 | } | |
1677 | ||
9bf24f59 EC |
1678 | if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) { |
1679 | int err; | |
1680 | u32 cache_size; | |
1681 | ||
1682 | cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]); | |
1683 | err = ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size); | |
1684 | if (err) | |
1685 | return err; | |
1686 | } | |
1687 | ||
95a7233c PB |
1688 | dp->user_features = user_features; |
1689 | ||
b83d23a2 MG |
1690 | if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU && |
1691 | a[OVS_DP_ATTR_PER_CPU_PIDS]) { | |
1692 | /* Upcall Netlink Port IDs have been updated */ | |
1693 | err = ovs_dp_set_upcall_portids(dp, | |
1694 | a[OVS_DP_ATTR_PER_CPU_PIDS]); | |
1695 | if (err) | |
1696 | return err; | |
1697 | } | |
1698 | ||
95a7233c PB |
1699 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) |
1700 | static_branch_enable(&tc_recirc_sharing_support); | |
1701 | else | |
1702 | static_branch_disable(&tc_recirc_sharing_support); | |
1703 | ||
1704 | return 0; | |
43d4be9c TG |
1705 | } |
1706 | ||
eec62ead TZ |
1707 | static int ovs_dp_stats_init(struct datapath *dp) |
1708 | { | |
1709 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1710 | if (!dp->stats_percpu) | |
1711 | return -ENOMEM; | |
1712 | ||
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | static int ovs_dp_vport_init(struct datapath *dp) | |
1717 | { | |
1718 | int i; | |
1719 | ||
1720 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1721 | sizeof(struct hlist_head), | |
1722 | GFP_KERNEL); | |
1723 | if (!dp->ports) | |
1724 | return -ENOMEM; | |
1725 | ||
1726 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1727 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1728 | ||
1729 | return 0; | |
1730 | } | |
1731 | ||
ccb1352e JG |
1732 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1733 | { | |
1734 | struct nlattr **a = info->attrs; | |
1735 | struct vport_parms parms; | |
1736 | struct sk_buff *reply; | |
1737 | struct datapath *dp; | |
1738 | struct vport *vport; | |
46df7b81 | 1739 | struct ovs_net *ovs_net; |
eec62ead | 1740 | int err; |
ccb1352e JG |
1741 | |
1742 | err = -EINVAL; | |
1743 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1744 | goto err; | |
1745 | ||
263ea090 | 1746 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1747 | if (!reply) |
1748 | return -ENOMEM; | |
ccb1352e JG |
1749 | |
1750 | err = -ENOMEM; | |
1751 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1752 | if (dp == NULL) | |
eec62ead | 1753 | goto err_destroy_reply; |
46df7b81 | 1754 | |
efd7ef1c | 1755 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1756 | |
1757 | /* Allocate table. */ | |
b637e498 PS |
1758 | err = ovs_flow_tbl_init(&dp->table); |
1759 | if (err) | |
eec62ead | 1760 | goto err_destroy_dp; |
ccb1352e | 1761 | |
eec62ead TZ |
1762 | err = ovs_dp_stats_init(dp); |
1763 | if (err) | |
ccb1352e | 1764 | goto err_destroy_table; |
ccb1352e | 1765 | |
eec62ead TZ |
1766 | err = ovs_dp_vport_init(dp); |
1767 | if (err) | |
1768 | goto err_destroy_stats; | |
15eac2a7 | 1769 | |
96fbc13d AZ |
1770 | err = ovs_meters_init(dp); |
1771 | if (err) | |
eec62ead | 1772 | goto err_destroy_ports; |
96fbc13d | 1773 | |
ccb1352e JG |
1774 | /* Set up our datapath device. */ |
1775 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1776 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1777 | parms.options = NULL; | |
1778 | parms.dp = dp; | |
1779 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1780 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1781 | |
6093ae9a JR |
1782 | /* So far only local changes have been made, now need the lock. */ |
1783 | ovs_lock(); | |
1784 | ||
fea07a48 EC |
1785 | err = ovs_dp_change(dp, a); |
1786 | if (err) | |
1787 | goto err_unlock_and_destroy_meters; | |
1788 | ||
ccb1352e JG |
1789 | vport = new_vport(&parms); |
1790 | if (IS_ERR(vport)) { | |
1791 | err = PTR_ERR(vport); | |
1792 | if (err == -EBUSY) | |
1793 | err = -EEXIST; | |
1794 | ||
44da5ae5 TG |
1795 | if (err == -EEXIST) { |
1796 | /* An outdated user space instance that does not understand | |
1797 | * the concept of user_features has attempted to create a new | |
1798 | * datapath and is likely to reuse it. Drop all user features. | |
1799 | */ | |
1800 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1801 | ovs_dp_reset_user_features(skb, info); | |
1802 | } | |
1803 | ||
fea07a48 | 1804 | goto err_unlock_and_destroy_meters; |
ccb1352e JG |
1805 | } |
1806 | ||
6093ae9a JR |
1807 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1808 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1809 | BUG_ON(err < 0); | |
ccb1352e | 1810 | |
46df7b81 | 1811 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1812 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1813 | |
1814 | ovs_unlock(); | |
ccb1352e | 1815 | |
2a94fe48 | 1816 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1817 | return 0; |
1818 | ||
fea07a48 EC |
1819 | err_unlock_and_destroy_meters: |
1820 | ovs_unlock(); | |
96fbc13d | 1821 | ovs_meters_exit(dp); |
eec62ead | 1822 | err_destroy_ports: |
15eac2a7 | 1823 | kfree(dp->ports); |
eec62ead | 1824 | err_destroy_stats: |
ccb1352e JG |
1825 | free_percpu(dp->stats_percpu); |
1826 | err_destroy_table: | |
9b996e54 | 1827 | ovs_flow_tbl_destroy(&dp->table); |
eec62ead | 1828 | err_destroy_dp: |
ccb1352e | 1829 | kfree(dp); |
eec62ead | 1830 | err_destroy_reply: |
6093ae9a | 1831 | kfree_skb(reply); |
ccb1352e JG |
1832 | err: |
1833 | return err; | |
1834 | } | |
1835 | ||
8e4e1713 | 1836 | /* Called with ovs_mutex. */ |
46df7b81 | 1837 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1838 | { |
1f3a090b | 1839 | struct flow_table *table = &dp->table; |
15eac2a7 | 1840 | int i; |
ccb1352e | 1841 | |
15eac2a7 PS |
1842 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1843 | struct vport *vport; | |
b67bfe0d | 1844 | struct hlist_node *n; |
15eac2a7 | 1845 | |
b67bfe0d | 1846 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1847 | if (vport->port_no != OVSP_LOCAL) |
1848 | ovs_dp_detach_port(vport); | |
1849 | } | |
ccb1352e | 1850 | |
59a35d60 | 1851 | list_del_rcu(&dp->list_node); |
ccb1352e | 1852 | |
8e4e1713 | 1853 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1854 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1855 | */ |
8e4e1713 | 1856 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1857 | |
1f3a090b TZ |
1858 | /* Flush sw_flow in the tables. RCU cb only releases resource |
1859 | * such as dp, ports and tables. That may avoid some issues | |
1860 | * such as RCU usage warning. | |
1861 | */ | |
1862 | table_instance_flow_flush(table, ovsl_dereference(table->ti), | |
1863 | ovsl_dereference(table->ufid_ti)); | |
1864 | ||
1865 | /* RCU destroy the ports, meters and flow tables. */ | |
ccb1352e | 1866 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1867 | } |
1868 | ||
1869 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1870 | { | |
1871 | struct sk_buff *reply; | |
1872 | struct datapath *dp; | |
1873 | int err; | |
1874 | ||
263ea090 | 1875 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1876 | if (!reply) |
1877 | return -ENOMEM; | |
1878 | ||
8e4e1713 | 1879 | ovs_lock(); |
46df7b81 PS |
1880 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1881 | err = PTR_ERR(dp); | |
1882 | if (IS_ERR(dp)) | |
6093ae9a | 1883 | goto err_unlock_free; |
46df7b81 | 1884 | |
6093ae9a JR |
1885 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1886 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1887 | BUG_ON(err < 0); | |
46df7b81 PS |
1888 | |
1889 | __dp_destroy(dp); | |
8e4e1713 | 1890 | ovs_unlock(); |
ccb1352e | 1891 | |
2a94fe48 | 1892 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1893 | |
1894 | return 0; | |
6093ae9a JR |
1895 | |
1896 | err_unlock_free: | |
8e4e1713 | 1897 | ovs_unlock(); |
6093ae9a | 1898 | kfree_skb(reply); |
8e4e1713 | 1899 | return err; |
ccb1352e JG |
1900 | } |
1901 | ||
1902 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1903 | { | |
1904 | struct sk_buff *reply; | |
1905 | struct datapath *dp; | |
1906 | int err; | |
1907 | ||
263ea090 | 1908 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1909 | if (!reply) |
1910 | return -ENOMEM; | |
1911 | ||
8e4e1713 | 1912 | ovs_lock(); |
46df7b81 | 1913 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1914 | err = PTR_ERR(dp); |
ccb1352e | 1915 | if (IS_ERR(dp)) |
6093ae9a | 1916 | goto err_unlock_free; |
ccb1352e | 1917 | |
95a7233c PB |
1918 | err = ovs_dp_change(dp, info->attrs); |
1919 | if (err) | |
1920 | goto err_unlock_free; | |
43d4be9c | 1921 | |
6093ae9a | 1922 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1923 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1924 | BUG_ON(err < 0); |
ccb1352e | 1925 | |
8e4e1713 | 1926 | ovs_unlock(); |
2a94fe48 | 1927 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1928 | |
1929 | return 0; | |
6093ae9a JR |
1930 | |
1931 | err_unlock_free: | |
8e4e1713 | 1932 | ovs_unlock(); |
6093ae9a | 1933 | kfree_skb(reply); |
8e4e1713 | 1934 | return err; |
ccb1352e JG |
1935 | } |
1936 | ||
1937 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1938 | { | |
1939 | struct sk_buff *reply; | |
1940 | struct datapath *dp; | |
8e4e1713 | 1941 | int err; |
ccb1352e | 1942 | |
263ea090 | 1943 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1944 | if (!reply) |
1945 | return -ENOMEM; | |
1946 | ||
8ec609d8 | 1947 | ovs_lock(); |
46df7b81 | 1948 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1949 | if (IS_ERR(dp)) { |
1950 | err = PTR_ERR(dp); | |
6093ae9a | 1951 | goto err_unlock_free; |
8e4e1713 | 1952 | } |
6093ae9a | 1953 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1954 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1955 | BUG_ON(err < 0); |
8ec609d8 | 1956 | ovs_unlock(); |
ccb1352e JG |
1957 | |
1958 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1959 | |
6093ae9a | 1960 | err_unlock_free: |
8ec609d8 | 1961 | ovs_unlock(); |
6093ae9a | 1962 | kfree_skb(reply); |
8e4e1713 | 1963 | return err; |
ccb1352e JG |
1964 | } |
1965 | ||
1966 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1967 | { | |
46df7b81 | 1968 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1969 | struct datapath *dp; |
1970 | int skip = cb->args[0]; | |
1971 | int i = 0; | |
1972 | ||
8ec609d8 PS |
1973 | ovs_lock(); |
1974 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1975 | if (i >= skip && |
15e47304 | 1976 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1977 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1978 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1979 | break; |
1980 | i++; | |
1981 | } | |
8ec609d8 | 1982 | ovs_unlock(); |
ccb1352e JG |
1983 | |
1984 | cb->args[0] = i; | |
1985 | ||
1986 | return skb->len; | |
1987 | } | |
1988 | ||
0c200ef9 PS |
1989 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1990 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1991 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1992 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
9bf24f59 EC |
1993 | [OVS_DP_ATTR_MASKS_CACHE_SIZE] = NLA_POLICY_RANGE(NLA_U32, 0, |
1994 | PCPU_MIN_UNIT_SIZE / sizeof(struct mask_cache_entry)), | |
0c200ef9 PS |
1995 | }; |
1996 | ||
66a9b928 | 1997 | static const struct genl_small_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1998 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1999 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2000 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2001 | .doit = ovs_dp_cmd_new |
2002 | }, | |
2003 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 2004 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2005 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2006 | .doit = ovs_dp_cmd_del |
2007 | }, | |
2008 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 2009 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2010 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2011 | .doit = ovs_dp_cmd_get, |
2012 | .dumpit = ovs_dp_cmd_dump | |
2013 | }, | |
2014 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 2015 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2016 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2017 | .doit = ovs_dp_cmd_set, |
2018 | }, | |
2019 | }; | |
2020 | ||
56989f6d | 2021 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 2022 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
2023 | .name = OVS_DATAPATH_FAMILY, |
2024 | .version = OVS_DATAPATH_VERSION, | |
2025 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 2026 | .policy = datapath_policy, |
3a4e0d6a PS |
2027 | .netnsok = true, |
2028 | .parallel_ops = true, | |
66a9b928 JK |
2029 | .small_ops = dp_datapath_genl_ops, |
2030 | .n_small_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
0c200ef9 PS |
2031 | .mcgrps = &ovs_dp_datapath_multicast_group, |
2032 | .n_mcgrps = 1, | |
489111e5 | 2033 | .module = THIS_MODULE, |
ccb1352e JG |
2034 | }; |
2035 | ||
8e4e1713 | 2036 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 2037 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 | 2038 | struct net *net, u32 portid, u32 seq, |
d4e4fdf9 | 2039 | u32 flags, u8 cmd, gfp_t gfp) |
ccb1352e JG |
2040 | { |
2041 | struct ovs_header *ovs_header; | |
2042 | struct ovs_vport_stats vport_stats; | |
2043 | int err; | |
2044 | ||
15e47304 | 2045 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
2046 | flags, cmd); |
2047 | if (!ovs_header) | |
2048 | return -EMSGSIZE; | |
2049 | ||
2050 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
2051 | ||
028d6a67 DM |
2052 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
2053 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 2054 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
2055 | ovs_vport_name(vport)) || |
2056 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 2057 | goto nla_put_failure; |
ccb1352e | 2058 | |
9354d452 | 2059 | if (!net_eq(net, dev_net(vport->dev))) { |
d4e4fdf9 | 2060 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
9354d452 JB |
2061 | |
2062 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
2063 | goto nla_put_failure; | |
2064 | } | |
2065 | ||
ccb1352e | 2066 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
2067 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
2068 | sizeof(struct ovs_vport_stats), &vport_stats, | |
2069 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 2070 | goto nla_put_failure; |
ccb1352e | 2071 | |
5cd667b0 AW |
2072 | if (ovs_vport_get_upcall_portids(vport, skb)) |
2073 | goto nla_put_failure; | |
2074 | ||
ccb1352e JG |
2075 | err = ovs_vport_get_options(vport, skb); |
2076 | if (err == -EMSGSIZE) | |
2077 | goto error; | |
2078 | ||
053c095a JB |
2079 | genlmsg_end(skb, ovs_header); |
2080 | return 0; | |
ccb1352e JG |
2081 | |
2082 | nla_put_failure: | |
2083 | err = -EMSGSIZE; | |
2084 | error: | |
2085 | genlmsg_cancel(skb, ovs_header); | |
2086 | return err; | |
2087 | } | |
2088 | ||
6093ae9a JR |
2089 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
2090 | { | |
2091 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2092 | } | |
2093 | ||
2094 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
2095 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
2096 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
2097 | { |
2098 | struct sk_buff *skb; | |
2099 | int retval; | |
2100 | ||
d4e4fdf9 | 2101 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
ccb1352e JG |
2102 | if (!skb) |
2103 | return ERR_PTR(-ENOMEM); | |
2104 | ||
d4e4fdf9 GN |
2105 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
2106 | GFP_KERNEL); | |
a9341512 JG |
2107 | BUG_ON(retval < 0); |
2108 | ||
ccb1352e JG |
2109 | return skb; |
2110 | } | |
2111 | ||
8e4e1713 | 2112 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 2113 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 2114 | const struct ovs_header *ovs_header, |
ccb1352e JG |
2115 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
2116 | { | |
2117 | struct datapath *dp; | |
2118 | struct vport *vport; | |
2119 | ||
9354d452 JB |
2120 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2121 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 2122 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 2123 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
2124 | if (!vport) |
2125 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
2126 | if (ovs_header->dp_ifindex && |
2127 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2128 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
2129 | return vport; |
2130 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
2131 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
2132 | ||
2133 | if (port_no >= DP_MAX_PORTS) | |
2134 | return ERR_PTR(-EFBIG); | |
2135 | ||
46df7b81 | 2136 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
2137 | if (!dp) |
2138 | return ERR_PTR(-ENODEV); | |
2139 | ||
8e4e1713 | 2140 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 2141 | if (!vport) |
14408dba | 2142 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
2143 | return vport; |
2144 | } else | |
2145 | return ERR_PTR(-EINVAL); | |
9354d452 | 2146 | |
ccb1352e JG |
2147 | } |
2148 | ||
6b660c41 | 2149 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 2150 | { |
6b660c41 | 2151 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
2152 | struct net_device *dev; |
2153 | struct vport *vport; | |
2154 | int i; | |
2155 | ||
2156 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
53742e69 | 2157 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
cf3266ad | 2158 | lockdep_ovsl_is_held()) { |
3a927bc7 PA |
2159 | dev = vport->dev; |
2160 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2161 | if (dev_headroom > max_headroom) | |
2162 | max_headroom = dev_headroom; | |
2163 | } | |
2164 | } | |
2165 | ||
6b660c41 TY |
2166 | return max_headroom; |
2167 | } | |
2168 | ||
2169 | /* Called with ovs_mutex */ | |
2170 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2171 | { | |
2172 | struct vport *vport; | |
2173 | int i; | |
2174 | ||
2175 | dp->max_headroom = new_headroom; | |
cf3266ad | 2176 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
53742e69 | 2177 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
cf3266ad | 2178 | lockdep_ovsl_is_held()) |
6b660c41 | 2179 | netdev_set_rx_headroom(vport->dev, new_headroom); |
cf3266ad | 2180 | } |
3a927bc7 PA |
2181 | } |
2182 | ||
ccb1352e JG |
2183 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2184 | { | |
2185 | struct nlattr **a = info->attrs; | |
2186 | struct ovs_header *ovs_header = info->userhdr; | |
2187 | struct vport_parms parms; | |
2188 | struct sk_buff *reply; | |
2189 | struct vport *vport; | |
2190 | struct datapath *dp; | |
6b660c41 | 2191 | unsigned int new_headroom; |
ccb1352e JG |
2192 | u32 port_no; |
2193 | int err; | |
2194 | ||
ccb1352e JG |
2195 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2196 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2197 | return -EINVAL; |
9354d452 JB |
2198 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2199 | return -EOPNOTSUPP; | |
6093ae9a JR |
2200 | |
2201 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2202 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2203 | if (port_no >= DP_MAX_PORTS) | |
2204 | return -EFBIG; | |
2205 | ||
2206 | reply = ovs_vport_cmd_alloc_info(); | |
2207 | if (!reply) | |
2208 | return -ENOMEM; | |
ccb1352e | 2209 | |
8e4e1713 | 2210 | ovs_lock(); |
62b9c8d0 | 2211 | restart: |
46df7b81 | 2212 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2213 | err = -ENODEV; |
2214 | if (!dp) | |
6093ae9a | 2215 | goto exit_unlock_free; |
ccb1352e | 2216 | |
6093ae9a | 2217 | if (port_no) { |
8e4e1713 | 2218 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2219 | err = -EBUSY; |
2220 | if (vport) | |
6093ae9a | 2221 | goto exit_unlock_free; |
ccb1352e JG |
2222 | } else { |
2223 | for (port_no = 1; ; port_no++) { | |
2224 | if (port_no >= DP_MAX_PORTS) { | |
2225 | err = -EFBIG; | |
6093ae9a | 2226 | goto exit_unlock_free; |
ccb1352e | 2227 | } |
8e4e1713 | 2228 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2229 | if (!vport) |
2230 | break; | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2235 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2236 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2237 | parms.dp = dp; | |
2238 | parms.port_no = port_no; | |
5cd667b0 | 2239 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2240 | |
2241 | vport = new_vport(&parms); | |
2242 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2243 | if (IS_ERR(vport)) { |
2244 | if (err == -EAGAIN) | |
2245 | goto restart; | |
6093ae9a | 2246 | goto exit_unlock_free; |
62b9c8d0 | 2247 | } |
ccb1352e | 2248 | |
9354d452 JB |
2249 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2250 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2251 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
3a927bc7 | 2252 | |
6b660c41 TY |
2253 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2254 | ||
2255 | if (new_headroom > dp->max_headroom) | |
2256 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2257 | else |
2258 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2259 | ||
6093ae9a JR |
2260 | BUG_ON(err < 0); |
2261 | ovs_unlock(); | |
ed661185 | 2262 | |
2a94fe48 | 2263 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2264 | return 0; |
ccb1352e | 2265 | |
6093ae9a | 2266 | exit_unlock_free: |
8e4e1713 | 2267 | ovs_unlock(); |
6093ae9a | 2268 | kfree_skb(reply); |
ccb1352e JG |
2269 | return err; |
2270 | } | |
2271 | ||
2272 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2273 | { | |
2274 | struct nlattr **a = info->attrs; | |
2275 | struct sk_buff *reply; | |
2276 | struct vport *vport; | |
2277 | int err; | |
2278 | ||
6093ae9a JR |
2279 | reply = ovs_vport_cmd_alloc_info(); |
2280 | if (!reply) | |
2281 | return -ENOMEM; | |
2282 | ||
8e4e1713 | 2283 | ovs_lock(); |
46df7b81 | 2284 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2285 | err = PTR_ERR(vport); |
2286 | if (IS_ERR(vport)) | |
6093ae9a | 2287 | goto exit_unlock_free; |
ccb1352e | 2288 | |
ccb1352e | 2289 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2290 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2291 | err = -EINVAL; |
6093ae9a | 2292 | goto exit_unlock_free; |
a9341512 JG |
2293 | } |
2294 | ||
f44f3408 | 2295 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2296 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2297 | if (err) |
6093ae9a | 2298 | goto exit_unlock_free; |
f44f3408 | 2299 | } |
a9341512 | 2300 | |
5cd667b0 AW |
2301 | |
2302 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2303 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2304 | ||
2305 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2306 | if (err) | |
2307 | goto exit_unlock_free; | |
2308 | } | |
ccb1352e | 2309 | |
9354d452 JB |
2310 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2311 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2312 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
a9341512 | 2313 | BUG_ON(err < 0); |
ccb1352e | 2314 | |
8e4e1713 | 2315 | ovs_unlock(); |
2a94fe48 | 2316 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2317 | return 0; |
ccb1352e | 2318 | |
6093ae9a | 2319 | exit_unlock_free: |
8e4e1713 | 2320 | ovs_unlock(); |
6093ae9a | 2321 | kfree_skb(reply); |
ccb1352e JG |
2322 | return err; |
2323 | } | |
2324 | ||
2325 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2326 | { | |
6b660c41 | 2327 | bool update_headroom = false; |
ccb1352e JG |
2328 | struct nlattr **a = info->attrs; |
2329 | struct sk_buff *reply; | |
3a927bc7 | 2330 | struct datapath *dp; |
ccb1352e | 2331 | struct vport *vport; |
6b660c41 | 2332 | unsigned int new_headroom; |
ccb1352e JG |
2333 | int err; |
2334 | ||
6093ae9a JR |
2335 | reply = ovs_vport_cmd_alloc_info(); |
2336 | if (!reply) | |
2337 | return -ENOMEM; | |
2338 | ||
8e4e1713 | 2339 | ovs_lock(); |
46df7b81 | 2340 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2341 | err = PTR_ERR(vport); |
2342 | if (IS_ERR(vport)) | |
6093ae9a | 2343 | goto exit_unlock_free; |
ccb1352e JG |
2344 | |
2345 | if (vport->port_no == OVSP_LOCAL) { | |
2346 | err = -EINVAL; | |
6093ae9a | 2347 | goto exit_unlock_free; |
ccb1352e JG |
2348 | } |
2349 | ||
9354d452 JB |
2350 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2351 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2352 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
6093ae9a | 2353 | BUG_ON(err < 0); |
3a927bc7 PA |
2354 | |
2355 | /* the vport deletion may trigger dp headroom update */ | |
2356 | dp = vport->dp; | |
2357 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2358 | update_headroom = true; |
2359 | ||
3a927bc7 | 2360 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2361 | ovs_dp_detach_port(vport); |
3a927bc7 | 2362 | |
6b660c41 TY |
2363 | if (update_headroom) { |
2364 | new_headroom = ovs_get_max_headroom(dp); | |
2365 | ||
2366 | if (new_headroom < dp->max_headroom) | |
2367 | ovs_update_headroom(dp, new_headroom); | |
2368 | } | |
6093ae9a | 2369 | ovs_unlock(); |
ccb1352e | 2370 | |
2a94fe48 | 2371 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2372 | return 0; |
ccb1352e | 2373 | |
6093ae9a | 2374 | exit_unlock_free: |
8e4e1713 | 2375 | ovs_unlock(); |
6093ae9a | 2376 | kfree_skb(reply); |
ccb1352e JG |
2377 | return err; |
2378 | } | |
2379 | ||
2380 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2381 | { | |
2382 | struct nlattr **a = info->attrs; | |
2383 | struct ovs_header *ovs_header = info->userhdr; | |
2384 | struct sk_buff *reply; | |
2385 | struct vport *vport; | |
2386 | int err; | |
2387 | ||
6093ae9a JR |
2388 | reply = ovs_vport_cmd_alloc_info(); |
2389 | if (!reply) | |
2390 | return -ENOMEM; | |
2391 | ||
ccb1352e | 2392 | rcu_read_lock(); |
46df7b81 | 2393 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2394 | err = PTR_ERR(vport); |
2395 | if (IS_ERR(vport)) | |
6093ae9a | 2396 | goto exit_unlock_free; |
9354d452 JB |
2397 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2398 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2399 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
6093ae9a | 2400 | BUG_ON(err < 0); |
ccb1352e JG |
2401 | rcu_read_unlock(); |
2402 | ||
2403 | return genlmsg_reply(reply, info); | |
2404 | ||
6093ae9a | 2405 | exit_unlock_free: |
ccb1352e | 2406 | rcu_read_unlock(); |
6093ae9a | 2407 | kfree_skb(reply); |
ccb1352e JG |
2408 | return err; |
2409 | } | |
2410 | ||
2411 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2412 | { | |
2413 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2414 | struct datapath *dp; | |
15eac2a7 PS |
2415 | int bucket = cb->args[0], skip = cb->args[1]; |
2416 | int i, j = 0; | |
ccb1352e | 2417 | |
42ee19e2 | 2418 | rcu_read_lock(); |
cc3a5ae6 | 2419 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2420 | if (!dp) { |
2421 | rcu_read_unlock(); | |
ccb1352e | 2422 | return -ENODEV; |
42ee19e2 | 2423 | } |
15eac2a7 | 2424 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2425 | struct vport *vport; |
15eac2a7 PS |
2426 | |
2427 | j = 0; | |
b67bfe0d | 2428 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2429 | if (j >= skip && |
2430 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2431 | sock_net(skb->sk), |
15e47304 | 2432 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2433 | cb->nlh->nlmsg_seq, |
2434 | NLM_F_MULTI, | |
d4e4fdf9 GN |
2435 | OVS_VPORT_CMD_GET, |
2436 | GFP_ATOMIC) < 0) | |
15eac2a7 PS |
2437 | goto out; |
2438 | ||
2439 | j++; | |
2440 | } | |
2441 | skip = 0; | |
ccb1352e | 2442 | } |
15eac2a7 | 2443 | out: |
ccb1352e JG |
2444 | rcu_read_unlock(); |
2445 | ||
15eac2a7 PS |
2446 | cb->args[0] = i; |
2447 | cb->args[1] = j; | |
ccb1352e | 2448 | |
15eac2a7 | 2449 | return skb->len; |
ccb1352e JG |
2450 | } |
2451 | ||
eac87c41 EC |
2452 | static void ovs_dp_masks_rebalance(struct work_struct *work) |
2453 | { | |
a65878d6 EC |
2454 | struct ovs_net *ovs_net = container_of(work, struct ovs_net, |
2455 | masks_rebalance.work); | |
2456 | struct datapath *dp; | |
eac87c41 EC |
2457 | |
2458 | ovs_lock(); | |
a65878d6 EC |
2459 | |
2460 | list_for_each_entry(dp, &ovs_net->dps, list_node) | |
2461 | ovs_flow_masks_rebalance(&dp->table); | |
2462 | ||
eac87c41 EC |
2463 | ovs_unlock(); |
2464 | ||
a65878d6 | 2465 | schedule_delayed_work(&ovs_net->masks_rebalance, |
eac87c41 EC |
2466 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); |
2467 | } | |
2468 | ||
0c200ef9 PS |
2469 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2470 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2471 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2472 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2473 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
ea8564c8 | 2474 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
0c200ef9 | 2475 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
9354d452 JB |
2476 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2477 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2478 | }; |
2479 | ||
66a9b928 | 2480 | static const struct genl_small_ops dp_vport_genl_ops[] = { |
ccb1352e | 2481 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2482 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2483 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2484 | .doit = ovs_vport_cmd_new |
2485 | }, | |
2486 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2487 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2488 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2489 | .doit = ovs_vport_cmd_del |
2490 | }, | |
2491 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2492 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2493 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2494 | .doit = ovs_vport_cmd_get, |
2495 | .dumpit = ovs_vport_cmd_dump | |
2496 | }, | |
2497 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2498 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2499 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2500 | .doit = ovs_vport_cmd_set, |
2501 | }, | |
2502 | }; | |
2503 | ||
56989f6d | 2504 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2505 | .hdrsize = sizeof(struct ovs_header), |
2506 | .name = OVS_VPORT_FAMILY, | |
2507 | .version = OVS_VPORT_VERSION, | |
2508 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2509 | .policy = vport_policy, |
0c200ef9 PS |
2510 | .netnsok = true, |
2511 | .parallel_ops = true, | |
66a9b928 JK |
2512 | .small_ops = dp_vport_genl_ops, |
2513 | .n_small_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
0c200ef9 PS |
2514 | .mcgrps = &ovs_dp_vport_multicast_group, |
2515 | .n_mcgrps = 1, | |
489111e5 | 2516 | .module = THIS_MODULE, |
ccb1352e JG |
2517 | }; |
2518 | ||
0c200ef9 PS |
2519 | static struct genl_family * const dp_genl_families[] = { |
2520 | &dp_datapath_genl_family, | |
2521 | &dp_vport_genl_family, | |
2522 | &dp_flow_genl_family, | |
2523 | &dp_packet_genl_family, | |
96fbc13d | 2524 | &dp_meter_genl_family, |
11efd5cb YHW |
2525 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2526 | &dp_ct_limit_genl_family, | |
2527 | #endif | |
ccb1352e JG |
2528 | }; |
2529 | ||
2530 | static void dp_unregister_genl(int n_families) | |
2531 | { | |
2532 | int i; | |
2533 | ||
2534 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2535 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2536 | } |
2537 | ||
56989f6d | 2538 | static int __init dp_register_genl(void) |
ccb1352e | 2539 | { |
ccb1352e JG |
2540 | int err; |
2541 | int i; | |
2542 | ||
ccb1352e | 2543 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2544 | |
0c200ef9 | 2545 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2546 | if (err) |
2547 | goto error; | |
ccb1352e JG |
2548 | } |
2549 | ||
2550 | return 0; | |
2551 | ||
2552 | error: | |
0c200ef9 | 2553 | dp_unregister_genl(i); |
ccb1352e JG |
2554 | return err; |
2555 | } | |
2556 | ||
46df7b81 PS |
2557 | static int __net_init ovs_init_net(struct net *net) |
2558 | { | |
2559 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
e0afe914 | 2560 | int err; |
46df7b81 PS |
2561 | |
2562 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2563 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
a65878d6 | 2564 | INIT_DELAYED_WORK(&ovs_net->masks_rebalance, ovs_dp_masks_rebalance); |
e0afe914 EC |
2565 | |
2566 | err = ovs_ct_init(net); | |
2567 | if (err) | |
2568 | return err; | |
2569 | ||
a65878d6 EC |
2570 | schedule_delayed_work(&ovs_net->masks_rebalance, |
2571 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); | |
e0afe914 | 2572 | return 0; |
46df7b81 PS |
2573 | } |
2574 | ||
7b4577a9 PS |
2575 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2576 | struct list_head *head) | |
46df7b81 | 2577 | { |
8e4e1713 | 2578 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2579 | struct datapath *dp; |
2580 | ||
2581 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2582 | int i; | |
2583 | ||
2584 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2585 | struct vport *vport; | |
2586 | ||
2587 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2588 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2589 | continue; | |
2590 | ||
be4ace6e | 2591 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2592 | list_add(&vport->detach_list, head); |
2593 | } | |
2594 | } | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2599 | { | |
2600 | struct datapath *dp, *dp_next; | |
2601 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2602 | struct vport *vport, *vport_next; | |
2603 | struct net *net; | |
2604 | LIST_HEAD(head); | |
46df7b81 | 2605 | |
8e4e1713 | 2606 | ovs_lock(); |
27de77ce TZ |
2607 | |
2608 | ovs_ct_exit(dnet); | |
2609 | ||
46df7b81 PS |
2610 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2611 | __dp_destroy(dp); | |
7b4577a9 | 2612 | |
f0b07bb1 | 2613 | down_read(&net_rwsem); |
7b4577a9 PS |
2614 | for_each_net(net) |
2615 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2616 | up_read(&net_rwsem); |
7b4577a9 PS |
2617 | |
2618 | /* Detach all vports from given namespace. */ | |
2619 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2620 | list_del(&vport->detach_list); | |
2621 | ovs_dp_detach_port(vport); | |
2622 | } | |
2623 | ||
8e4e1713 PS |
2624 | ovs_unlock(); |
2625 | ||
a65878d6 | 2626 | cancel_delayed_work_sync(&ovs_net->masks_rebalance); |
8e4e1713 | 2627 | cancel_work_sync(&ovs_net->dp_notify_work); |
46df7b81 PS |
2628 | } |
2629 | ||
2630 | static struct pernet_operations ovs_net_ops = { | |
2631 | .init = ovs_init_net, | |
2632 | .exit = ovs_exit_net, | |
2633 | .id = &ovs_net_id, | |
2634 | .size = sizeof(struct ovs_net), | |
2635 | }; | |
2636 | ||
ccb1352e JG |
2637 | static int __init dp_init(void) |
2638 | { | |
ccb1352e JG |
2639 | int err; |
2640 | ||
cf3266ad TZ |
2641 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > |
2642 | sizeof_field(struct sk_buff, cb)); | |
ccb1352e JG |
2643 | |
2644 | pr_info("Open vSwitch switching datapath\n"); | |
2645 | ||
971427f3 | 2646 | err = action_fifos_init(); |
ccb1352e JG |
2647 | if (err) |
2648 | goto error; | |
2649 | ||
971427f3 AZ |
2650 | err = ovs_internal_dev_rtnl_link_register(); |
2651 | if (err) | |
2652 | goto error_action_fifos_exit; | |
2653 | ||
5b9e7e16 JP |
2654 | err = ovs_flow_init(); |
2655 | if (err) | |
2656 | goto error_unreg_rtnl_link; | |
2657 | ||
ccb1352e JG |
2658 | err = ovs_vport_init(); |
2659 | if (err) | |
2660 | goto error_flow_exit; | |
2661 | ||
46df7b81 | 2662 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2663 | if (err) |
2664 | goto error_vport_exit; | |
2665 | ||
46df7b81 PS |
2666 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2667 | if (err) | |
2668 | goto error_netns_exit; | |
2669 | ||
62b9c8d0 TG |
2670 | err = ovs_netdev_init(); |
2671 | if (err) | |
2672 | goto error_unreg_notifier; | |
2673 | ||
ccb1352e JG |
2674 | err = dp_register_genl(); |
2675 | if (err < 0) | |
62b9c8d0 | 2676 | goto error_unreg_netdev; |
ccb1352e | 2677 | |
ccb1352e JG |
2678 | return 0; |
2679 | ||
62b9c8d0 TG |
2680 | error_unreg_netdev: |
2681 | ovs_netdev_exit(); | |
ccb1352e JG |
2682 | error_unreg_notifier: |
2683 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2684 | error_netns_exit: |
2685 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2686 | error_vport_exit: |
2687 | ovs_vport_exit(); | |
2688 | error_flow_exit: | |
2689 | ovs_flow_exit(); | |
5b9e7e16 JP |
2690 | error_unreg_rtnl_link: |
2691 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2692 | error_action_fifos_exit: |
2693 | action_fifos_exit(); | |
ccb1352e JG |
2694 | error: |
2695 | return err; | |
2696 | } | |
2697 | ||
2698 | static void dp_cleanup(void) | |
2699 | { | |
ccb1352e | 2700 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2701 | ovs_netdev_exit(); |
ccb1352e | 2702 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2703 | unregister_pernet_device(&ovs_net_ops); |
2704 | rcu_barrier(); | |
ccb1352e JG |
2705 | ovs_vport_exit(); |
2706 | ovs_flow_exit(); | |
5b9e7e16 | 2707 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2708 | action_fifos_exit(); |
ccb1352e JG |
2709 | } |
2710 | ||
2711 | module_init(dp_init); | |
2712 | module_exit(dp_cleanup); | |
2713 | ||
2714 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2715 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2716 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2717 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2718 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2719 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2720 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2721 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |