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> | |
35d39fec | 40 | #include <net/pkt_cls.h> |
ccb1352e JG |
41 | |
42 | #include "datapath.h" | |
43 | #include "flow.h" | |
e80857cc | 44 | #include "flow_table.h" |
e6445719 | 45 | #include "flow_netlink.h" |
96fbc13d | 46 | #include "meter.h" |
c4ab7b56 | 47 | #include "openvswitch_trace.h" |
ccb1352e | 48 | #include "vport-internal_dev.h" |
cff63a52 | 49 | #include "vport-netdev.h" |
ccb1352e | 50 | |
c7d03a00 | 51 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 52 | |
0c200ef9 PS |
53 | static struct genl_family dp_packet_genl_family; |
54 | static struct genl_family dp_flow_genl_family; | |
55 | static struct genl_family dp_datapath_genl_family; | |
56 | ||
74ed7ab9 JS |
57 | static const struct nla_policy flow_policy[]; |
58 | ||
48e48a70 | 59 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
60 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
61 | }; |
62 | ||
48e48a70 | 63 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
64 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
65 | }; |
66 | ||
48e48a70 | 67 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
68 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
69 | }; |
70 | ||
fb5d1e9e JR |
71 | /* Check if need to build a reply message. |
72 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
73 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
74 | unsigned int group) | |
fb5d1e9e JR |
75 | { |
76 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 77 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
78 | } |
79 | ||
68eb5503 | 80 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 81 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 82 | { |
92c14d9b | 83 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
84 | } |
85 | ||
ccb1352e JG |
86 | /** |
87 | * DOC: Locking: | |
88 | * | |
8e4e1713 PS |
89 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
90 | * operations on vports, etc.), Writes to other state (flow table | |
91 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
92 | * by ovs_lock. | |
ccb1352e JG |
93 | * |
94 | * Reads are protected by RCU. | |
95 | * | |
96 | * There are a few special cases (mostly stats) that have their own | |
97 | * synchronization but they nest under all of above and don't interact with | |
98 | * each other. | |
8e4e1713 PS |
99 | * |
100 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
101 | */ |
102 | ||
8e4e1713 PS |
103 | static DEFINE_MUTEX(ovs_mutex); |
104 | ||
105 | void ovs_lock(void) | |
106 | { | |
107 | mutex_lock(&ovs_mutex); | |
108 | } | |
109 | ||
110 | void ovs_unlock(void) | |
111 | { | |
112 | mutex_unlock(&ovs_mutex); | |
113 | } | |
114 | ||
115 | #ifdef CONFIG_LOCKDEP | |
116 | int lockdep_ovsl_is_held(void) | |
117 | { | |
118 | if (debug_locks) | |
119 | return lockdep_is_held(&ovs_mutex); | |
120 | else | |
121 | return 1; | |
122 | } | |
123 | #endif | |
124 | ||
ccb1352e | 125 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 126 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 127 | const struct sw_flow_key *, |
f2a4d086 WT |
128 | const struct dp_upcall_info *, |
129 | uint32_t cutlen); | |
8055a89c | 130 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 131 | const struct sw_flow_key *, |
f2a4d086 WT |
132 | const struct dp_upcall_info *, |
133 | uint32_t cutlen); | |
ccb1352e | 134 | |
eac87c41 EC |
135 | static void ovs_dp_masks_rebalance(struct work_struct *work); |
136 | ||
b83d23a2 MG |
137 | static int ovs_dp_set_upcall_portids(struct datapath *, const struct nlattr *); |
138 | ||
8e4e1713 | 139 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 140 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 141 | { |
8e4e1713 | 142 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 143 | return ovs_vport_name(vport); |
ccb1352e JG |
144 | } |
145 | ||
12eb18f7 | 146 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
147 | { |
148 | struct vport *local; | |
149 | int ifindex; | |
150 | ||
151 | rcu_read_lock(); | |
152 | ||
15eac2a7 | 153 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 154 | if (local) |
be4ace6e | 155 | ifindex = local->dev->ifindex; |
ccb1352e JG |
156 | else |
157 | ifindex = 0; | |
158 | ||
159 | rcu_read_unlock(); | |
160 | ||
161 | return ifindex; | |
162 | } | |
163 | ||
164 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
165 | { | |
166 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
167 | ||
9b996e54 | 168 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 169 | free_percpu(dp->stats_percpu); |
15eac2a7 | 170 | kfree(dp->ports); |
96fbc13d | 171 | ovs_meters_exit(dp); |
076999e4 | 172 | kfree(rcu_dereference_raw(dp->upcall_portids)); |
ccb1352e JG |
173 | kfree(dp); |
174 | } | |
175 | ||
15eac2a7 PS |
176 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
177 | u16 port_no) | |
178 | { | |
179 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
180 | } | |
181 | ||
bb6f9a70 | 182 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
183 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
184 | { | |
185 | struct vport *vport; | |
15eac2a7 PS |
186 | struct hlist_head *head; |
187 | ||
188 | head = vport_hash_bucket(dp, port_no); | |
53742e69 | 189 | hlist_for_each_entry_rcu(vport, head, dp_hash_node, |
cf3266ad | 190 | lockdep_ovsl_is_held()) { |
15eac2a7 PS |
191 | if (vport->port_no == port_no) |
192 | return vport; | |
193 | } | |
194 | return NULL; | |
195 | } | |
196 | ||
8e4e1713 | 197 | /* Called with ovs_mutex. */ |
ccb1352e JG |
198 | static struct vport *new_vport(const struct vport_parms *parms) |
199 | { | |
200 | struct vport *vport; | |
201 | ||
202 | vport = ovs_vport_add(parms); | |
203 | if (!IS_ERR(vport)) { | |
204 | struct datapath *dp = parms->dp; | |
15eac2a7 | 205 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 206 | |
15eac2a7 | 207 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 208 | } |
ccb1352e JG |
209 | return vport; |
210 | } | |
211 | ||
ccb1352e JG |
212 | void ovs_dp_detach_port(struct vport *p) |
213 | { | |
8e4e1713 | 214 | ASSERT_OVSL(); |
ccb1352e JG |
215 | |
216 | /* First drop references to device. */ | |
15eac2a7 | 217 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
218 | |
219 | /* Then destroy it. */ | |
220 | ovs_vport_del(p); | |
221 | } | |
222 | ||
223 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 224 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 225 | { |
83c8df26 | 226 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
227 | struct datapath *dp = p->dp; |
228 | struct sw_flow *flow; | |
d98612b8 | 229 | struct sw_flow_actions *sf_acts; |
ccb1352e | 230 | struct dp_stats_percpu *stats; |
ccb1352e | 231 | u64 *stats_counter; |
1bd7116f | 232 | u32 n_mask_hit; |
9d2f627b | 233 | u32 n_cache_hit; |
aa733660 | 234 | int error; |
ccb1352e | 235 | |
404f2f10 | 236 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 237 | |
ccb1352e | 238 | /* Look up flow. */ |
04b7d136 | 239 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
9d2f627b | 240 | &n_mask_hit, &n_cache_hit); |
ccb1352e JG |
241 | if (unlikely(!flow)) { |
242 | struct dp_upcall_info upcall; | |
243 | ||
ccea7445 | 244 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 245 | upcall.cmd = OVS_PACKET_CMD_MISS; |
b83d23a2 MG |
246 | |
247 | if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU) | |
784dcfa5 MG |
248 | upcall.portid = |
249 | ovs_dp_get_upcall_portid(dp, smp_processor_id()); | |
b83d23a2 MG |
250 | else |
251 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); | |
252 | ||
7f8a436e | 253 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 254 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
255 | if (unlikely(error)) |
256 | kfree_skb(skb); | |
257 | else | |
258 | consume_skb(skb); | |
ccb1352e JG |
259 | stats_counter = &stats->n_missed; |
260 | goto out; | |
261 | } | |
262 | ||
d98612b8 LJ |
263 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
264 | sf_acts = rcu_dereference(flow->sf_acts); | |
aa733660 YS |
265 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
266 | if (unlikely(error)) | |
267 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
cf3266ad | 268 | ovs_dp_name(dp), error); |
ccb1352e | 269 | |
e298e505 | 270 | stats_counter = &stats->n_hit; |
ccb1352e JG |
271 | |
272 | out: | |
273 | /* Update datapath statistics. */ | |
df9d9fdf | 274 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 275 | (*stats_counter)++; |
1bd7116f | 276 | stats->n_mask_hit += n_mask_hit; |
9d2f627b | 277 | stats->n_cache_hit += n_cache_hit; |
df9d9fdf | 278 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
279 | } |
280 | ||
ccb1352e | 281 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 282 | const struct sw_flow_key *key, |
f2a4d086 WT |
283 | const struct dp_upcall_info *upcall_info, |
284 | uint32_t cutlen) | |
ccb1352e JG |
285 | { |
286 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
287 | int err; |
288 | ||
c4ab7b56 AC |
289 | if (trace_ovs_dp_upcall_enabled()) |
290 | trace_ovs_dp_upcall(dp, skb, key, upcall_info); | |
291 | ||
15e47304 | 292 | if (upcall_info->portid == 0) { |
ccb1352e JG |
293 | err = -ENOTCONN; |
294 | goto err; | |
295 | } | |
296 | ||
ccb1352e | 297 | if (!skb_is_gso(skb)) |
f2a4d086 | 298 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 299 | else |
f2a4d086 | 300 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
301 | if (err) |
302 | goto err; | |
303 | ||
304 | return 0; | |
305 | ||
306 | err: | |
404f2f10 | 307 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 308 | |
df9d9fdf | 309 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 310 | stats->n_lost++; |
df9d9fdf | 311 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
312 | |
313 | return err; | |
314 | } | |
315 | ||
8055a89c | 316 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 317 | const struct sw_flow_key *key, |
f2a4d086 | 318 | const struct dp_upcall_info *upcall_info, |
cf3266ad | 319 | uint32_t cutlen) |
ccb1352e | 320 | { |
2734166e | 321 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 322 | struct sw_flow_key later_key; |
ccb1352e JG |
323 | struct sk_buff *segs, *nskb; |
324 | int err; | |
325 | ||
a08e7fd9 | 326 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_GSO_CB_OFFSET); |
09c5e605 | 327 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
328 | if (IS_ERR(segs)) |
329 | return PTR_ERR(segs); | |
330966e5 FW |
330 | if (segs == NULL) |
331 | return -EINVAL; | |
ccb1352e | 332 | |
0c19f846 WB |
333 | if (gso_type & SKB_GSO_UDP) { |
334 | /* The initial flow key extracted by ovs_flow_key_extract() | |
335 | * in this case is for a first fragment, so we need to | |
336 | * properly mark later fragments. | |
337 | */ | |
338 | later_key = *key; | |
339 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
340 | } | |
341 | ||
ccb1352e | 342 | /* Queue all of the segments. */ |
2cec4448 | 343 | skb_list_walk_safe(segs, skb, nskb) { |
0c19f846 WB |
344 | if (gso_type & SKB_GSO_UDP && skb != segs) |
345 | key = &later_key; | |
346 | ||
f2a4d086 | 347 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
348 | if (err) |
349 | break; | |
350 | ||
2cec4448 | 351 | } |
ccb1352e JG |
352 | |
353 | /* Free all of the segments. */ | |
2cec4448 | 354 | skb_list_walk_safe(segs, skb, nskb) { |
ccb1352e JG |
355 | if (err) |
356 | kfree_skb(skb); | |
357 | else | |
358 | consume_skb(skb); | |
2cec4448 | 359 | } |
ccb1352e JG |
360 | return err; |
361 | } | |
362 | ||
8f0aad6f | 363 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 364 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
365 | { |
366 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 367 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 | 368 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
bd1903b7 TZ |
369 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ |
370 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
c3ff8cfe TG |
371 | |
372 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
373 | if (upcall_info->userdata) |
374 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
375 | ||
376 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
377 | if (upcall_info->egress_tun_info) | |
378 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 379 | |
ccea7445 NM |
380 | /* OVS_PACKET_ATTR_ACTIONS */ |
381 | if (upcall_info->actions_len) | |
494bea39 | 382 | size += nla_total_size(actions_attrlen); |
ccea7445 | 383 | |
7f8a436e JS |
384 | /* OVS_PACKET_ATTR_MRU */ |
385 | if (upcall_info->mru) | |
386 | size += nla_total_size(sizeof(upcall_info->mru)); | |
387 | ||
c3ff8cfe TG |
388 | return size; |
389 | } | |
390 | ||
7f8a436e JS |
391 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
392 | { | |
393 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
394 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
395 | ||
396 | if (plen > 0) | |
b080db58 | 397 | skb_put_zero(skb, plen); |
7f8a436e JS |
398 | } |
399 | } | |
400 | ||
8055a89c | 401 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 402 | const struct sw_flow_key *key, |
f2a4d086 WT |
403 | const struct dp_upcall_info *upcall_info, |
404 | uint32_t cutlen) | |
ccb1352e JG |
405 | { |
406 | struct ovs_header *upcall; | |
407 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 408 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 409 | struct nlattr *nla; |
795449d8 | 410 | size_t len; |
bda56f14 | 411 | unsigned int hlen; |
8055a89c | 412 | int err, dp_ifindex; |
bd1903b7 | 413 | u64 hash; |
8055a89c TG |
414 | |
415 | dp_ifindex = get_dpifindex(dp); | |
416 | if (!dp_ifindex) | |
417 | return -ENODEV; | |
ccb1352e | 418 | |
df8a39de | 419 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
420 | nskb = skb_clone(skb, GFP_ATOMIC); |
421 | if (!nskb) | |
422 | return -ENOMEM; | |
423 | ||
5968250c | 424 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 425 | if (!nskb) |
ccb1352e JG |
426 | return -ENOMEM; |
427 | ||
ccb1352e JG |
428 | skb = nskb; |
429 | } | |
430 | ||
431 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
432 | err = -EFBIG; | |
433 | goto out; | |
434 | } | |
435 | ||
bda56f14 TG |
436 | /* Complete checksum if needed */ |
437 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 438 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
439 | goto out; |
440 | ||
441 | /* Older versions of OVS user space enforce alignment of the last | |
442 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
443 | * padding logic. Only perform zerocopy if padding is not required. | |
444 | */ | |
445 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
446 | hlen = skb_zerocopy_headlen(skb); | |
447 | else | |
448 | hlen = skb->len; | |
449 | ||
494bea39 LZ |
450 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
451 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 452 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
453 | if (!user_skb) { |
454 | err = -ENOMEM; | |
455 | goto out; | |
456 | } | |
457 | ||
458 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
459 | 0, upcall_info->cmd); | |
6f19893b KL |
460 | if (!upcall) { |
461 | err = -EINVAL; | |
462 | goto out; | |
463 | } | |
ccb1352e JG |
464 | upcall->dp_ifindex = dp_ifindex; |
465 | ||
5b4237bb | 466 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
467 | if (err) |
468 | goto out; | |
ccb1352e JG |
469 | |
470 | if (upcall_info->userdata) | |
4490108b BP |
471 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
472 | nla_len(upcall_info->userdata), | |
473 | nla_data(upcall_info->userdata)); | |
ccb1352e | 474 | |
8f0aad6f | 475 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
476 | nla = nla_nest_start_noflag(user_skb, |
477 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
478 | if (!nla) { |
479 | err = -EMSGSIZE; | |
480 | goto out; | |
481 | } | |
fc4099f1 PS |
482 | err = ovs_nla_put_tunnel_info(user_skb, |
483 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
484 | if (err) |
485 | goto out; | |
486 | ||
8f0aad6f WZ |
487 | nla_nest_end(user_skb, nla); |
488 | } | |
489 | ||
ccea7445 | 490 | if (upcall_info->actions_len) { |
ae0be8de | 491 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
492 | if (!nla) { |
493 | err = -EMSGSIZE; | |
494 | goto out; | |
495 | } | |
ccea7445 NM |
496 | err = ovs_nla_put_actions(upcall_info->actions, |
497 | upcall_info->actions_len, | |
498 | user_skb); | |
499 | if (!err) | |
500 | nla_nest_end(user_skb, nla); | |
501 | else | |
502 | nla_nest_cancel(user_skb, nla); | |
503 | } | |
504 | ||
7f8a436e | 505 | /* Add OVS_PACKET_ATTR_MRU */ |
61ca533c TZ |
506 | if (upcall_info->mru && |
507 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
508 | err = -ENOBUFS; | |
509 | goto out; | |
7f8a436e JS |
510 | } |
511 | ||
b95e5928 | 512 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
61ca533c TZ |
513 | if (cutlen > 0 && |
514 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
515 | err = -ENOBUFS; | |
516 | goto out; | |
b95e5928 WT |
517 | } |
518 | ||
bd1903b7 TZ |
519 | /* Add OVS_PACKET_ATTR_HASH */ |
520 | hash = skb_get_hash_raw(skb); | |
521 | if (skb->sw_hash) | |
522 | hash |= OVS_PACKET_HASH_SW_BIT; | |
523 | ||
524 | if (skb->l4_hash) | |
525 | hash |= OVS_PACKET_HASH_L4_BIT; | |
526 | ||
527 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
528 | err = -ENOBUFS; | |
529 | goto out; | |
530 | } | |
531 | ||
bda56f14 TG |
532 | /* Only reserve room for attribute header, packet data is added |
533 | * in skb_zerocopy() */ | |
534 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
535 | err = -ENOBUFS; | |
536 | goto out; | |
537 | } | |
f2a4d086 | 538 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 539 | |
f2a4d086 | 540 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
541 | if (err) |
542 | goto out; | |
ccb1352e | 543 | |
aea0bb4f | 544 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 545 | pad_packet(dp, user_skb); |
aea0bb4f | 546 | |
bda56f14 | 547 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 548 | |
bda56f14 | 549 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 550 | user_skb = NULL; |
ccb1352e | 551 | out: |
36d5fe6a ZK |
552 | if (err) |
553 | skb_tx_error(skb); | |
4ee45ea0 | 554 | kfree_skb(user_skb); |
ccb1352e JG |
555 | kfree_skb(nskb); |
556 | return err; | |
557 | } | |
558 | ||
ccb1352e JG |
559 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
560 | { | |
561 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 562 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
563 | struct nlattr **a = info->attrs; |
564 | struct sw_flow_actions *acts; | |
565 | struct sk_buff *packet; | |
566 | struct sw_flow *flow; | |
d98612b8 | 567 | struct sw_flow_actions *sf_acts; |
ccb1352e | 568 | struct datapath *dp; |
83c8df26 | 569 | struct vport *input_vport; |
7f8a436e | 570 | u16 mru = 0; |
bd1903b7 | 571 | u64 hash; |
ccb1352e JG |
572 | int len; |
573 | int err; | |
1ba39804 | 574 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
575 | |
576 | err = -EINVAL; | |
577 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 578 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
579 | goto err; |
580 | ||
581 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
582 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
583 | err = -ENOMEM; | |
584 | if (!packet) | |
585 | goto err; | |
586 | skb_reserve(packet, NET_IP_ALIGN); | |
587 | ||
32686a9d | 588 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 589 | |
7f8a436e JS |
590 | /* Set packet's mru */ |
591 | if (a[OVS_PACKET_ATTR_MRU]) { | |
592 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
593 | packet->ignore_df = 1; | |
594 | } | |
595 | OVS_CB(packet)->mru = mru; | |
596 | ||
bd1903b7 TZ |
597 | if (a[OVS_PACKET_ATTR_HASH]) { |
598 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
599 | ||
600 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
601 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
602 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
603 | } | |
604 | ||
ccb1352e | 605 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 606 | flow = ovs_flow_alloc(); |
ccb1352e JG |
607 | err = PTR_ERR(flow); |
608 | if (IS_ERR(flow)) | |
609 | goto err_kfree_skb; | |
610 | ||
c2ac6673 JS |
611 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
612 | packet, &flow->key, log); | |
ccb1352e JG |
613 | if (err) |
614 | goto err_flow_free; | |
615 | ||
7f8a436e | 616 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 617 | &flow->key, &acts, log); |
74f84a57 PS |
618 | if (err) |
619 | goto err_flow_free; | |
ccb1352e | 620 | |
f5796684 | 621 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 622 | packet->priority = flow->key.phy.priority; |
39c7caeb | 623 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
624 | |
625 | rcu_read_lock(); | |
7f8a436e | 626 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
627 | err = -ENODEV; |
628 | if (!dp) | |
629 | goto err_unlock; | |
630 | ||
83c8df26 PS |
631 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
632 | if (!input_vport) | |
633 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
634 | ||
635 | if (!input_vport) | |
636 | goto err_unlock; | |
637 | ||
7f8a436e | 638 | packet->dev = input_vport->dev; |
83c8df26 | 639 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 640 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 641 | |
ccb1352e | 642 | local_bh_disable(); |
d98612b8 | 643 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
644 | local_bh_enable(); |
645 | rcu_read_unlock(); | |
646 | ||
03f0d916 | 647 | ovs_flow_free(flow, false); |
ccb1352e JG |
648 | return err; |
649 | ||
650 | err_unlock: | |
651 | rcu_read_unlock(); | |
652 | err_flow_free: | |
03f0d916 | 653 | ovs_flow_free(flow, false); |
ccb1352e JG |
654 | err_kfree_skb: |
655 | kfree_skb(packet); | |
656 | err: | |
657 | return err; | |
658 | } | |
659 | ||
660 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 661 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
662 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
663 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 664 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 665 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
b5ab1f1b | 666 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, |
ccb1352e JG |
667 | }; |
668 | ||
66a9b928 | 669 | static const struct genl_small_ops dp_packet_genl_ops[] = { |
ccb1352e | 670 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 671 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 672 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
673 | .doit = ovs_packet_cmd_execute |
674 | } | |
675 | }; | |
676 | ||
56989f6d | 677 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
678 | .hdrsize = sizeof(struct ovs_header), |
679 | .name = OVS_PACKET_FAMILY, | |
680 | .version = OVS_PACKET_VERSION, | |
681 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 682 | .policy = packet_policy, |
0c200ef9 PS |
683 | .netnsok = true, |
684 | .parallel_ops = true, | |
66a9b928 JK |
685 | .small_ops = dp_packet_genl_ops, |
686 | .n_small_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 687 | .module = THIS_MODULE, |
0c200ef9 PS |
688 | }; |
689 | ||
12eb18f7 | 690 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 691 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
692 | { |
693 | int i; | |
ccb1352e | 694 | |
1bd7116f AZ |
695 | memset(mega_stats, 0, sizeof(*mega_stats)); |
696 | ||
b637e498 | 697 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 698 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
699 | |
700 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 701 | |
ccb1352e JG |
702 | for_each_possible_cpu(i) { |
703 | const struct dp_stats_percpu *percpu_stats; | |
704 | struct dp_stats_percpu local_stats; | |
705 | unsigned int start; | |
706 | ||
707 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
708 | ||
709 | do { | |
57a7744e | 710 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 711 | local_stats = *percpu_stats; |
57a7744e | 712 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
713 | |
714 | stats->n_hit += local_stats.n_hit; | |
715 | stats->n_missed += local_stats.n_missed; | |
716 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 717 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
9d2f627b | 718 | mega_stats->n_cache_hit += local_stats.n_cache_hit; |
ccb1352e JG |
719 | } |
720 | } | |
721 | ||
74ed7ab9 JS |
722 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
723 | { | |
724 | return ovs_identifier_is_ufid(sfid) && | |
725 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
726 | } | |
727 | ||
728 | static bool should_fill_mask(uint32_t ufid_flags) | |
729 | { | |
730 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
731 | } | |
732 | ||
733 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 734 | { |
74ed7ab9 JS |
735 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
736 | } | |
737 | ||
738 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
739 | const struct sw_flow_id *sfid, | |
740 | uint32_t ufid_flags) | |
741 | { | |
742 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
743 | ||
4e81c0b3 PA |
744 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback |
745 | * see ovs_nla_put_identifier() | |
746 | */ | |
74ed7ab9 JS |
747 | if (sfid && ovs_identifier_is_ufid(sfid)) |
748 | len += nla_total_size(sfid->ufid_len); | |
4e81c0b3 PA |
749 | else |
750 | len += nla_total_size(ovs_key_attr_size()); | |
74ed7ab9 JS |
751 | |
752 | /* OVS_FLOW_ATTR_KEY */ | |
753 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
754 | len += nla_total_size(ovs_key_attr_size()); | |
755 | ||
756 | /* OVS_FLOW_ATTR_MASK */ | |
757 | if (should_fill_mask(ufid_flags)) | |
758 | len += nla_total_size(ovs_key_attr_size()); | |
759 | ||
760 | /* OVS_FLOW_ATTR_ACTIONS */ | |
761 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 762 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
763 | |
764 | return len | |
66c7a5ee | 765 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 766 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 767 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
768 | } |
769 | ||
ca7105f2 JS |
770 | /* Called with ovs_mutex or RCU read lock. */ |
771 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
772 | struct sk_buff *skb) | |
773 | { | |
774 | struct ovs_flow_stats stats; | |
775 | __be16 tcp_flags; | |
776 | unsigned long used; | |
ccb1352e | 777 | |
e298e505 | 778 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 779 | |
028d6a67 | 780 | if (used && |
0238b720 ND |
781 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
782 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 783 | return -EMSGSIZE; |
ccb1352e | 784 | |
028d6a67 | 785 | if (stats.n_packets && |
66c7a5ee ND |
786 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
787 | sizeof(struct ovs_flow_stats), &stats, | |
788 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 789 | return -EMSGSIZE; |
ccb1352e | 790 | |
e298e505 PS |
791 | if ((u8)ntohs(tcp_flags) && |
792 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
793 | return -EMSGSIZE; |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Called with ovs_mutex or RCU read lock. */ | |
799 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
800 | struct sk_buff *skb, int skb_orig_len) | |
801 | { | |
802 | struct nlattr *start; | |
803 | int err; | |
ccb1352e JG |
804 | |
805 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
806 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
807 | * Netlink but individual action lists can be longer than | |
808 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
809 | * The userspace caller can always fetch the actions separately if it | |
810 | * really wants them. (Most userspace callers in fact don't care.) | |
811 | * | |
812 | * This can only fail for dump operations because the skb is always | |
813 | * properly sized for single flows. | |
814 | */ | |
ae0be8de | 815 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 816 | if (start) { |
d57170b1 PS |
817 | const struct sw_flow_actions *sf_acts; |
818 | ||
663efa36 | 819 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
820 | err = ovs_nla_put_actions(sf_acts->actions, |
821 | sf_acts->actions_len, skb); | |
0e9796b4 | 822 | |
74f84a57 PS |
823 | if (!err) |
824 | nla_nest_end(skb, start); | |
825 | else { | |
826 | if (skb_orig_len) | |
ca7105f2 | 827 | return err; |
74f84a57 PS |
828 | |
829 | nla_nest_cancel(skb, start); | |
830 | } | |
ca7105f2 JS |
831 | } else if (skb_orig_len) { |
832 | return -EMSGSIZE; | |
833 | } | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
838 | /* Called with ovs_mutex or RCU read lock. */ | |
839 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
840 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 841 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
842 | { |
843 | const int skb_orig_len = skb->len; | |
844 | struct ovs_header *ovs_header; | |
845 | int err; | |
846 | ||
847 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
848 | flags, cmd); | |
849 | if (!ovs_header) | |
850 | return -EMSGSIZE; | |
851 | ||
852 | ovs_header->dp_ifindex = dp_ifindex; | |
853 | ||
74ed7ab9 | 854 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
855 | if (err) |
856 | goto error; | |
857 | ||
74ed7ab9 JS |
858 | if (should_fill_key(&flow->id, ufid_flags)) { |
859 | err = ovs_nla_put_masked_key(flow, skb); | |
860 | if (err) | |
861 | goto error; | |
862 | } | |
863 | ||
864 | if (should_fill_mask(ufid_flags)) { | |
865 | err = ovs_nla_put_mask(flow, skb); | |
866 | if (err) | |
867 | goto error; | |
868 | } | |
ca7105f2 JS |
869 | |
870 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
871 | if (err) | |
872 | goto error; | |
873 | ||
74ed7ab9 JS |
874 | if (should_fill_actions(ufid_flags)) { |
875 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
876 | if (err) | |
877 | goto error; | |
878 | } | |
ccb1352e | 879 | |
053c095a JB |
880 | genlmsg_end(skb, ovs_header); |
881 | return 0; | |
ccb1352e | 882 | |
ccb1352e JG |
883 | error: |
884 | genlmsg_cancel(skb, ovs_header); | |
885 | return err; | |
886 | } | |
887 | ||
0e9796b4 JR |
888 | /* May not be called with RCU read lock. */ |
889 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 890 | const struct sw_flow_id *sfid, |
fb5d1e9e | 891 | struct genl_info *info, |
74ed7ab9 JS |
892 | bool always, |
893 | uint32_t ufid_flags) | |
ccb1352e | 894 | { |
fb5d1e9e | 895 | struct sk_buff *skb; |
74ed7ab9 | 896 | size_t len; |
ccb1352e | 897 | |
9b67aa4a | 898 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
899 | return NULL; |
900 | ||
74ed7ab9 | 901 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 902 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
903 | if (!skb) |
904 | return ERR_PTR(-ENOMEM); | |
905 | ||
906 | return skb; | |
ccb1352e JG |
907 | } |
908 | ||
0e9796b4 JR |
909 | /* Called with ovs_mutex. */ |
910 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
911 | int dp_ifindex, | |
912 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 913 | bool always, u32 ufid_flags) |
ccb1352e JG |
914 | { |
915 | struct sk_buff *skb; | |
916 | int retval; | |
917 | ||
74ed7ab9 JS |
918 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
919 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 920 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 921 | return skb; |
ccb1352e | 922 | |
0e9796b4 JR |
923 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
924 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 925 | cmd, ufid_flags); |
8ffeb03f PA |
926 | if (WARN_ON_ONCE(retval < 0)) { |
927 | kfree_skb(skb); | |
928 | skb = ERR_PTR(retval); | |
929 | } | |
ccb1352e JG |
930 | return skb; |
931 | } | |
932 | ||
37bdc87b | 933 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 934 | { |
7f8a436e | 935 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
936 | struct nlattr **a = info->attrs; |
937 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 938 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 939 | struct sw_flow_mask mask; |
ccb1352e JG |
940 | struct sk_buff *reply; |
941 | struct datapath *dp; | |
37bdc87b | 942 | struct sw_flow_actions *acts; |
03f0d916 | 943 | struct sw_flow_match match; |
74ed7ab9 | 944 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 945 | int error; |
05da5898 | 946 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 947 | |
893f139b | 948 | /* Must have key and actions. */ |
ccb1352e | 949 | error = -EINVAL; |
426cda5c | 950 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 951 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 952 | goto error; |
426cda5c JG |
953 | } |
954 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 955 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 956 | goto error; |
426cda5c | 957 | } |
03f0d916 | 958 | |
893f139b JR |
959 | /* Most of the time we need to allocate a new flow, do it before |
960 | * locking. | |
961 | */ | |
962 | new_flow = ovs_flow_alloc(); | |
963 | if (IS_ERR(new_flow)) { | |
964 | error = PTR_ERR(new_flow); | |
965 | goto error; | |
966 | } | |
967 | ||
968 | /* Extract key. */ | |
2279994d | 969 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 970 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 971 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 972 | if (error) |
893f139b | 973 | goto err_kfree_flow; |
ccb1352e | 974 | |
74ed7ab9 JS |
975 | /* Extract flow identifier. */ |
976 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 977 | &new_flow->key, log); |
74ed7ab9 JS |
978 | if (error) |
979 | goto err_kfree_flow; | |
74f84a57 | 980 | |
190aa3e7 | 981 | /* unmasked key is needed to match when ufid is not used. */ |
982 | if (ovs_identifier_is_key(&new_flow->id)) | |
983 | match.key = new_flow->id.unmasked_key; | |
984 | ||
985 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
986 | ||
893f139b | 987 | /* Validate actions. */ |
7f8a436e JS |
988 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
989 | &new_flow->key, &acts, log); | |
37bdc87b | 990 | if (error) { |
05da5898 | 991 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 992 | goto err_kfree_flow; |
893f139b JR |
993 | } |
994 | ||
74ed7ab9 JS |
995 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
996 | ufid_flags); | |
893f139b JR |
997 | if (IS_ERR(reply)) { |
998 | error = PTR_ERR(reply); | |
999 | goto err_kfree_acts; | |
ccb1352e JG |
1000 | } |
1001 | ||
8e4e1713 | 1002 | ovs_lock(); |
7f8a436e | 1003 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1004 | if (unlikely(!dp)) { |
1005 | error = -ENODEV; | |
8e4e1713 | 1006 | goto err_unlock_ovs; |
893f139b | 1007 | } |
74ed7ab9 | 1008 | |
03f0d916 | 1009 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
1010 | if (ovs_identifier_is_ufid(&new_flow->id)) |
1011 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
1012 | if (!flow) | |
190aa3e7 | 1013 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
1014 | if (likely(!flow)) { |
1015 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
1016 | |
1017 | /* Put flow in bucket. */ | |
893f139b JR |
1018 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1019 | if (unlikely(error)) { | |
618ed0c8 | 1020 | acts = NULL; |
893f139b JR |
1021 | goto err_unlock_ovs; |
1022 | } | |
1023 | ||
1024 | if (unlikely(reply)) { | |
1025 | error = ovs_flow_cmd_fill_info(new_flow, | |
1026 | ovs_header->dp_ifindex, | |
1027 | reply, info->snd_portid, | |
1028 | info->snd_seq, 0, | |
74ed7ab9 JS |
1029 | OVS_FLOW_CMD_NEW, |
1030 | ufid_flags); | |
893f139b | 1031 | BUG_ON(error < 0); |
618ed0c8 | 1032 | } |
893f139b | 1033 | ovs_unlock(); |
ccb1352e | 1034 | } else { |
37bdc87b JR |
1035 | struct sw_flow_actions *old_acts; |
1036 | ||
ccb1352e JG |
1037 | /* Bail out if we're not allowed to modify an existing flow. |
1038 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1039 | * because Generic Netlink treats the latter as a dump | |
1040 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1041 | * gets fixed. | |
1042 | */ | |
893f139b JR |
1043 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1044 | | NLM_F_EXCL))) { | |
1045 | error = -EEXIST; | |
8e4e1713 | 1046 | goto err_unlock_ovs; |
893f139b | 1047 | } |
74ed7ab9 JS |
1048 | /* The flow identifier has to be the same for flow updates. |
1049 | * Look for any overlapping flow. | |
1050 | */ | |
1051 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1052 | if (ovs_identifier_is_key(&flow->id)) | |
1053 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1054 | &match); | |
1055 | else /* UFID matches but key is different */ | |
1056 | flow = NULL; | |
4a46b24e AW |
1057 | if (!flow) { |
1058 | error = -ENOENT; | |
1059 | goto err_unlock_ovs; | |
1060 | } | |
893f139b | 1061 | } |
37bdc87b JR |
1062 | /* Update actions. */ |
1063 | old_acts = ovsl_dereference(flow->sf_acts); | |
1064 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1065 | |
893f139b JR |
1066 | if (unlikely(reply)) { |
1067 | error = ovs_flow_cmd_fill_info(flow, | |
1068 | ovs_header->dp_ifindex, | |
1069 | reply, info->snd_portid, | |
1070 | info->snd_seq, 0, | |
74ed7ab9 JS |
1071 | OVS_FLOW_CMD_NEW, |
1072 | ufid_flags); | |
893f139b JR |
1073 | BUG_ON(error < 0); |
1074 | } | |
1075 | ovs_unlock(); | |
37bdc87b | 1076 | |
34ae932a | 1077 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1078 | ovs_flow_free(new_flow, false); |
37bdc87b | 1079 | } |
893f139b JR |
1080 | |
1081 | if (reply) | |
1082 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1083 | return 0; |
1084 | ||
37bdc87b JR |
1085 | err_unlock_ovs: |
1086 | ovs_unlock(); | |
893f139b JR |
1087 | kfree_skb(reply); |
1088 | err_kfree_acts: | |
34ae932a | 1089 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1090 | err_kfree_flow: |
1091 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1092 | error: |
1093 | return error; | |
1094 | } | |
ccb1352e | 1095 | |
2fdb957d | 1096 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
cf3266ad TZ |
1097 | static noinline_for_stack |
1098 | struct sw_flow_actions *get_flow_actions(struct net *net, | |
1099 | const struct nlattr *a, | |
1100 | const struct sw_flow_key *key, | |
1101 | const struct sw_flow_mask *mask, | |
1102 | bool log) | |
6b205b2c JG |
1103 | { |
1104 | struct sw_flow_actions *acts; | |
1105 | struct sw_flow_key masked_key; | |
1106 | int error; | |
1107 | ||
ae5f2fb1 | 1108 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1109 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1110 | if (error) { |
05da5898 JR |
1111 | OVS_NLERR(log, |
1112 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1113 | return ERR_PTR(error); |
1114 | } | |
1115 | ||
1116 | return acts; | |
1117 | } | |
1118 | ||
9cc9a5cb TZ |
1119 | /* Factor out match-init and action-copy to avoid |
1120 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1121 | * used to get actions, we new a function to save some | |
1122 | * stack space. | |
1123 | * | |
1124 | * If there are not key and action attrs, we return 0 | |
1125 | * directly. In the case, the caller will also not use the | |
1126 | * match as before. If there is action attr, we try to get | |
1127 | * actions and save them to *acts. Before returning from | |
1128 | * the function, we reset the match->mask pointer. Because | |
1129 | * we should not to return match object with dangling reference | |
1130 | * to mask. | |
1131 | * */ | |
26063790 AB |
1132 | static noinline_for_stack int |
1133 | ovs_nla_init_match_and_action(struct net *net, | |
1134 | struct sw_flow_match *match, | |
1135 | struct sw_flow_key *key, | |
1136 | struct nlattr **a, | |
1137 | struct sw_flow_actions **acts, | |
1138 | bool log) | |
9cc9a5cb TZ |
1139 | { |
1140 | struct sw_flow_mask mask; | |
1141 | int error = 0; | |
1142 | ||
1143 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1144 | ovs_match_init(match, key, true, &mask); | |
1145 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1146 | a[OVS_FLOW_ATTR_MASK], log); | |
1147 | if (error) | |
1148 | goto error; | |
1149 | } | |
1150 | ||
1151 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1152 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1153 | OVS_NLERR(log, | |
1154 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1155 | error = -EINVAL; |
1156 | goto error; | |
9cc9a5cb TZ |
1157 | } |
1158 | ||
1159 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1160 | &mask, log); | |
1161 | if (IS_ERR(*acts)) { | |
1162 | error = PTR_ERR(*acts); | |
1163 | goto error; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* On success, error is 0. */ | |
1168 | error: | |
1169 | match->mask = NULL; | |
1170 | return error; | |
1171 | } | |
1172 | ||
37bdc87b JR |
1173 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1174 | { | |
7f8a436e | 1175 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1176 | struct nlattr **a = info->attrs; |
1177 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1178 | struct sw_flow_key key; |
37bdc87b | 1179 | struct sw_flow *flow; |
37bdc87b JR |
1180 | struct sk_buff *reply = NULL; |
1181 | struct datapath *dp; | |
893f139b | 1182 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1183 | struct sw_flow_match match; |
74ed7ab9 JS |
1184 | struct sw_flow_id sfid; |
1185 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1186 | int error = 0; |
05da5898 | 1187 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1188 | bool ufid_present; |
37bdc87b | 1189 | |
74ed7ab9 | 1190 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1191 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1192 | OVS_NLERR(log, |
1193 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1194 | return -EINVAL; |
6f15cdbf | 1195 | } |
9cc9a5cb TZ |
1196 | |
1197 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1198 | &acts, log); | |
37bdc87b JR |
1199 | if (error) |
1200 | goto error; | |
1201 | ||
9cc9a5cb | 1202 | if (acts) { |
2fdb957d | 1203 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1204 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1205 | ufid_flags); | |
893f139b JR |
1206 | if (IS_ERR(reply)) { |
1207 | error = PTR_ERR(reply); | |
1208 | goto err_kfree_acts; | |
be52c9e9 | 1209 | } |
37bdc87b | 1210 | } |
0e9796b4 | 1211 | |
37bdc87b | 1212 | ovs_lock(); |
7f8a436e | 1213 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1214 | if (unlikely(!dp)) { |
1215 | error = -ENODEV; | |
37bdc87b | 1216 | goto err_unlock_ovs; |
893f139b | 1217 | } |
37bdc87b | 1218 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1219 | if (ufid_present) |
1220 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1221 | else | |
1222 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1223 | if (unlikely(!flow)) { |
1224 | error = -ENOENT; | |
37bdc87b | 1225 | goto err_unlock_ovs; |
893f139b | 1226 | } |
4a46b24e | 1227 | |
37bdc87b | 1228 | /* Update actions, if present. */ |
893f139b | 1229 | if (likely(acts)) { |
37bdc87b JR |
1230 | old_acts = ovsl_dereference(flow->sf_acts); |
1231 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1232 | |
1233 | if (unlikely(reply)) { | |
1234 | error = ovs_flow_cmd_fill_info(flow, | |
1235 | ovs_header->dp_ifindex, | |
1236 | reply, info->snd_portid, | |
1237 | info->snd_seq, 0, | |
804fe108 | 1238 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1239 | ufid_flags); |
893f139b JR |
1240 | BUG_ON(error < 0); |
1241 | } | |
1242 | } else { | |
1243 | /* Could not alloc without acts before locking. */ | |
1244 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1245 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1246 | ufid_flags); |
1247 | ||
b5ffe634 | 1248 | if (IS_ERR(reply)) { |
893f139b JR |
1249 | error = PTR_ERR(reply); |
1250 | goto err_unlock_ovs; | |
1251 | } | |
ccb1352e | 1252 | } |
37bdc87b | 1253 | |
37bdc87b JR |
1254 | /* Clear stats. */ |
1255 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1256 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1257 | ovs_unlock(); |
ccb1352e | 1258 | |
893f139b JR |
1259 | if (reply) |
1260 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1261 | if (old_acts) | |
34ae932a | 1262 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1263 | |
ccb1352e JG |
1264 | return 0; |
1265 | ||
8e4e1713 PS |
1266 | err_unlock_ovs: |
1267 | ovs_unlock(); | |
893f139b JR |
1268 | kfree_skb(reply); |
1269 | err_kfree_acts: | |
34ae932a | 1270 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1271 | error: |
1272 | return error; | |
1273 | } | |
1274 | ||
1275 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1276 | { | |
1277 | struct nlattr **a = info->attrs; | |
1278 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1279 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1280 | struct sw_flow_key key; |
1281 | struct sk_buff *reply; | |
1282 | struct sw_flow *flow; | |
1283 | struct datapath *dp; | |
03f0d916 | 1284 | struct sw_flow_match match; |
74ed7ab9 JS |
1285 | struct sw_flow_id ufid; |
1286 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1287 | int err = 0; | |
05da5898 | 1288 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1289 | bool ufid_present; |
ccb1352e | 1290 | |
74ed7ab9 JS |
1291 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1292 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1293 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1294 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1295 | log); |
1296 | } else if (!ufid_present) { | |
05da5898 JR |
1297 | OVS_NLERR(log, |
1298 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1299 | err = -EINVAL; |
03f0d916 | 1300 | } |
ccb1352e JG |
1301 | if (err) |
1302 | return err; | |
1303 | ||
8e4e1713 | 1304 | ovs_lock(); |
46df7b81 | 1305 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1306 | if (!dp) { |
1307 | err = -ENODEV; | |
1308 | goto unlock; | |
1309 | } | |
ccb1352e | 1310 | |
74ed7ab9 JS |
1311 | if (ufid_present) |
1312 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1313 | else | |
1314 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1315 | if (!flow) { |
8e4e1713 PS |
1316 | err = -ENOENT; |
1317 | goto unlock; | |
1318 | } | |
ccb1352e | 1319 | |
0e9796b4 | 1320 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1321 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1322 | if (IS_ERR(reply)) { |
1323 | err = PTR_ERR(reply); | |
1324 | goto unlock; | |
1325 | } | |
ccb1352e | 1326 | |
8e4e1713 | 1327 | ovs_unlock(); |
ccb1352e | 1328 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1329 | unlock: |
1330 | ovs_unlock(); | |
1331 | return err; | |
ccb1352e JG |
1332 | } |
1333 | ||
1334 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1335 | { | |
1336 | struct nlattr **a = info->attrs; | |
1337 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1338 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1339 | struct sw_flow_key key; |
1340 | struct sk_buff *reply; | |
74ed7ab9 | 1341 | struct sw_flow *flow = NULL; |
ccb1352e | 1342 | struct datapath *dp; |
03f0d916 | 1343 | struct sw_flow_match match; |
74ed7ab9 JS |
1344 | struct sw_flow_id ufid; |
1345 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1346 | int err; |
05da5898 | 1347 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1348 | bool ufid_present; |
ccb1352e | 1349 | |
74ed7ab9 JS |
1350 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1351 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1352 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1353 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1354 | NULL, log); | |
aed06778 JR |
1355 | if (unlikely(err)) |
1356 | return err; | |
1357 | } | |
1358 | ||
8e4e1713 | 1359 | ovs_lock(); |
46df7b81 | 1360 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1361 | if (unlikely(!dp)) { |
8e4e1713 PS |
1362 | err = -ENODEV; |
1363 | goto unlock; | |
1364 | } | |
46df7b81 | 1365 | |
74ed7ab9 | 1366 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1367 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1368 | goto unlock; |
1369 | } | |
03f0d916 | 1370 | |
74ed7ab9 JS |
1371 | if (ufid_present) |
1372 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1373 | else | |
1374 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1375 | if (unlikely(!flow)) { |
8e4e1713 PS |
1376 | err = -ENOENT; |
1377 | goto unlock; | |
1378 | } | |
ccb1352e | 1379 | |
b637e498 | 1380 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1381 | ovs_unlock(); |
ccb1352e | 1382 | |
aed06778 | 1383 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1384 | &flow->id, info, false, ufid_flags); |
aed06778 | 1385 | if (likely(reply)) { |
b90f5aa4 | 1386 | if (!IS_ERR(reply)) { |
aed06778 JR |
1387 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1388 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1389 | reply, info->snd_portid, | |
1390 | info->snd_seq, 0, | |
74ed7ab9 JS |
1391 | OVS_FLOW_CMD_DEL, |
1392 | ufid_flags); | |
aed06778 | 1393 | rcu_read_unlock(); |
8a574f86 PA |
1394 | if (WARN_ON_ONCE(err < 0)) { |
1395 | kfree_skb(reply); | |
1396 | goto out_free; | |
1397 | } | |
aed06778 JR |
1398 | |
1399 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1400 | } else { | |
cf3266ad TZ |
1401 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, |
1402 | PTR_ERR(reply)); | |
aed06778 | 1403 | } |
fb5d1e9e | 1404 | } |
ccb1352e | 1405 | |
8a574f86 | 1406 | out_free: |
aed06778 | 1407 | ovs_flow_free(flow, true); |
ccb1352e | 1408 | return 0; |
8e4e1713 PS |
1409 | unlock: |
1410 | ovs_unlock(); | |
1411 | return err; | |
ccb1352e JG |
1412 | } |
1413 | ||
1414 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1415 | { | |
74ed7ab9 | 1416 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1417 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1418 | struct table_instance *ti; |
ccb1352e | 1419 | struct datapath *dp; |
74ed7ab9 JS |
1420 | u32 ufid_flags; |
1421 | int err; | |
1422 | ||
8cb08174 JB |
1423 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1424 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1425 | if (err) |
1426 | return err; | |
1427 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1428 | |
d57170b1 | 1429 | rcu_read_lock(); |
cc3a5ae6 | 1430 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1431 | if (!dp) { |
d57170b1 | 1432 | rcu_read_unlock(); |
ccb1352e | 1433 | return -ENODEV; |
8e4e1713 | 1434 | } |
ccb1352e | 1435 | |
b637e498 | 1436 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1437 | for (;;) { |
1438 | struct sw_flow *flow; | |
1439 | u32 bucket, obj; | |
1440 | ||
1441 | bucket = cb->args[0]; | |
1442 | obj = cb->args[1]; | |
b637e498 | 1443 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1444 | if (!flow) |
1445 | break; | |
1446 | ||
0e9796b4 | 1447 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1448 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1449 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1450 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1451 | break; |
1452 | ||
1453 | cb->args[0] = bucket; | |
1454 | cb->args[1] = obj; | |
1455 | } | |
d57170b1 | 1456 | rcu_read_unlock(); |
ccb1352e JG |
1457 | return skb->len; |
1458 | } | |
1459 | ||
0c200ef9 PS |
1460 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1461 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1462 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1463 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1464 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1465 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1466 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1467 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1468 | }; |
1469 | ||
66a9b928 | 1470 | static const struct genl_small_ops dp_flow_genl_ops[] = { |
ccb1352e | 1471 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1472 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1473 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1474 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1475 | }, |
1476 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1477 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1478 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1479 | .doit = ovs_flow_cmd_del |
1480 | }, | |
1481 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1482 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1483 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1484 | .doit = ovs_flow_cmd_get, |
1485 | .dumpit = ovs_flow_cmd_dump | |
1486 | }, | |
1487 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1488 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1489 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1490 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1491 | }, |
1492 | }; | |
1493 | ||
56989f6d | 1494 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1495 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1496 | .name = OVS_FLOW_FAMILY, |
1497 | .version = OVS_FLOW_VERSION, | |
1498 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1499 | .policy = flow_policy, |
3a4e0d6a PS |
1500 | .netnsok = true, |
1501 | .parallel_ops = true, | |
66a9b928 JK |
1502 | .small_ops = dp_flow_genl_ops, |
1503 | .n_small_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
0c200ef9 PS |
1504 | .mcgrps = &ovs_dp_flow_multicast_group, |
1505 | .n_mcgrps = 1, | |
489111e5 | 1506 | .module = THIS_MODULE, |
ccb1352e JG |
1507 | }; |
1508 | ||
c3ff8cfe TG |
1509 | static size_t ovs_dp_cmd_msg_size(void) |
1510 | { | |
1511 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1512 | ||
1513 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1514 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1515 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1516 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
9bf24f59 | 1517 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_MASKS_CACHE_SIZE */ |
c3ff8cfe TG |
1518 | |
1519 | return msgsize; | |
1520 | } | |
1521 | ||
8ec609d8 | 1522 | /* Called with ovs_mutex. */ |
ccb1352e | 1523 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1524 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1525 | { |
1526 | struct ovs_header *ovs_header; | |
1527 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1528 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1529 | int err; |
1530 | ||
15e47304 | 1531 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
cf3266ad | 1532 | flags, cmd); |
ccb1352e JG |
1533 | if (!ovs_header) |
1534 | goto error; | |
1535 | ||
1536 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1537 | ||
ccb1352e | 1538 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1539 | if (err) |
1540 | goto nla_put_failure; | |
1541 | ||
1bd7116f | 1542 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1543 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1544 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1545 | goto nla_put_failure; |
1546 | ||
66c7a5ee ND |
1547 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1548 | sizeof(struct ovs_dp_megaflow_stats), | |
1549 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1550 | goto nla_put_failure; |
ccb1352e | 1551 | |
43d4be9c TG |
1552 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1553 | goto nla_put_failure; | |
1554 | ||
9bf24f59 EC |
1555 | if (nla_put_u32(skb, OVS_DP_ATTR_MASKS_CACHE_SIZE, |
1556 | ovs_flow_tbl_masks_cache_size(&dp->table))) | |
1557 | goto nla_put_failure; | |
1558 | ||
053c095a JB |
1559 | genlmsg_end(skb, ovs_header); |
1560 | return 0; | |
ccb1352e JG |
1561 | |
1562 | nla_put_failure: | |
1563 | genlmsg_cancel(skb, ovs_header); | |
1564 | error: | |
1565 | return -EMSGSIZE; | |
1566 | } | |
1567 | ||
263ea090 | 1568 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1569 | { |
551ddc05 | 1570 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1571 | } |
1572 | ||
bb6f9a70 | 1573 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1574 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1575 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1576 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1577 | { | |
1578 | struct datapath *dp; | |
1579 | ||
1580 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1581 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1582 | else { |
1583 | struct vport *vport; | |
1584 | ||
46df7b81 | 1585 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1586 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1587 | } |
1588 | return dp ? dp : ERR_PTR(-ENODEV); | |
1589 | } | |
1590 | ||
cf3266ad TZ |
1591 | static void ovs_dp_reset_user_features(struct sk_buff *skb, |
1592 | struct genl_info *info) | |
44da5ae5 TG |
1593 | { |
1594 | struct datapath *dp; | |
1595 | ||
cf3266ad TZ |
1596 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, |
1597 | info->attrs); | |
3c7eacfc | 1598 | if (IS_ERR(dp)) |
44da5ae5 TG |
1599 | return; |
1600 | ||
1601 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1602 | dp->user_features = 0; | |
1603 | } | |
1604 | ||
b83d23a2 MG |
1605 | static int ovs_dp_set_upcall_portids(struct datapath *dp, |
1606 | const struct nlattr *ids) | |
1607 | { | |
1608 | struct dp_nlsk_pids *old, *dp_nlsk_pids; | |
1609 | ||
1610 | if (!nla_len(ids) || nla_len(ids) % sizeof(u32)) | |
1611 | return -EINVAL; | |
1612 | ||
1613 | old = ovsl_dereference(dp->upcall_portids); | |
1614 | ||
1615 | dp_nlsk_pids = kmalloc(sizeof(*dp_nlsk_pids) + nla_len(ids), | |
1616 | GFP_KERNEL); | |
1617 | if (!dp_nlsk_pids) | |
1618 | return -ENOMEM; | |
1619 | ||
1620 | dp_nlsk_pids->n_pids = nla_len(ids) / sizeof(u32); | |
1621 | nla_memcpy(dp_nlsk_pids->pids, ids, nla_len(ids)); | |
1622 | ||
1623 | rcu_assign_pointer(dp->upcall_portids, dp_nlsk_pids); | |
1624 | ||
1625 | kfree_rcu(old, rcu); | |
1626 | ||
1627 | return 0; | |
1628 | } | |
1629 | ||
1630 | u32 ovs_dp_get_upcall_portid(const struct datapath *dp, uint32_t cpu_id) | |
1631 | { | |
1632 | struct dp_nlsk_pids *dp_nlsk_pids; | |
1633 | ||
1634 | dp_nlsk_pids = rcu_dereference(dp->upcall_portids); | |
1635 | ||
1636 | if (dp_nlsk_pids) { | |
1637 | if (cpu_id < dp_nlsk_pids->n_pids) { | |
1638 | return dp_nlsk_pids->pids[cpu_id]; | |
784dcfa5 MG |
1639 | } else if (dp_nlsk_pids->n_pids > 0 && |
1640 | cpu_id >= dp_nlsk_pids->n_pids) { | |
1641 | /* If the number of netlink PIDs is mismatched with | |
1642 | * the number of CPUs as seen by the kernel, log this | |
1643 | * and send the upcall to an arbitrary socket (0) in | |
1644 | * order to not drop packets | |
b83d23a2 MG |
1645 | */ |
1646 | pr_info_ratelimited("cpu_id mismatch with handler threads"); | |
784dcfa5 MG |
1647 | return dp_nlsk_pids->pids[cpu_id % |
1648 | dp_nlsk_pids->n_pids]; | |
b83d23a2 MG |
1649 | } else { |
1650 | return 0; | |
1651 | } | |
1652 | } else { | |
1653 | return 0; | |
1654 | } | |
1655 | } | |
1656 | ||
95a7233c | 1657 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
43d4be9c | 1658 | { |
35d39fec | 1659 | u32 user_features = 0, old_features = dp->user_features; |
b83d23a2 | 1660 | int err; |
95a7233c PB |
1661 | |
1662 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1663 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1664 | ||
1665 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1666 | OVS_DP_F_UNALIGNED | | |
b83d23a2 MG |
1667 | OVS_DP_F_TC_RECIRC_SHARING | |
1668 | OVS_DP_F_DISPATCH_UPCALL_PER_CPU)) | |
95a7233c PB |
1669 | return -EOPNOTSUPP; |
1670 | ||
1671 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1672 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1673 | return -EOPNOTSUPP; | |
1674 | #endif | |
1675 | } | |
1676 | ||
9bf24f59 EC |
1677 | if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) { |
1678 | int err; | |
1679 | u32 cache_size; | |
1680 | ||
1681 | cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]); | |
1682 | err = ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size); | |
1683 | if (err) | |
1684 | return err; | |
1685 | } | |
1686 | ||
95a7233c PB |
1687 | dp->user_features = user_features; |
1688 | ||
b83d23a2 MG |
1689 | if (dp->user_features & OVS_DP_F_DISPATCH_UPCALL_PER_CPU && |
1690 | a[OVS_DP_ATTR_PER_CPU_PIDS]) { | |
1691 | /* Upcall Netlink Port IDs have been updated */ | |
1692 | err = ovs_dp_set_upcall_portids(dp, | |
1693 | a[OVS_DP_ATTR_PER_CPU_PIDS]); | |
1694 | if (err) | |
1695 | return err; | |
1696 | } | |
1697 | ||
35d39fec PB |
1698 | if ((dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) && |
1699 | !(old_features & OVS_DP_F_TC_RECIRC_SHARING)) | |
1700 | tc_skb_ext_tc_enable(); | |
1701 | else if (!(dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) && | |
1702 | (old_features & OVS_DP_F_TC_RECIRC_SHARING)) | |
1703 | tc_skb_ext_tc_disable(); | |
95a7233c PB |
1704 | |
1705 | return 0; | |
43d4be9c TG |
1706 | } |
1707 | ||
eec62ead TZ |
1708 | static int ovs_dp_stats_init(struct datapath *dp) |
1709 | { | |
1710 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1711 | if (!dp->stats_percpu) | |
1712 | return -ENOMEM; | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static int ovs_dp_vport_init(struct datapath *dp) | |
1718 | { | |
1719 | int i; | |
1720 | ||
1721 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1722 | sizeof(struct hlist_head), | |
1723 | GFP_KERNEL); | |
1724 | if (!dp->ports) | |
1725 | return -ENOMEM; | |
1726 | ||
1727 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1728 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1729 | ||
1730 | return 0; | |
1731 | } | |
1732 | ||
ccb1352e JG |
1733 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1734 | { | |
1735 | struct nlattr **a = info->attrs; | |
1736 | struct vport_parms parms; | |
1737 | struct sk_buff *reply; | |
1738 | struct datapath *dp; | |
1739 | struct vport *vport; | |
46df7b81 | 1740 | struct ovs_net *ovs_net; |
eec62ead | 1741 | int err; |
ccb1352e JG |
1742 | |
1743 | err = -EINVAL; | |
1744 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1745 | goto err; | |
1746 | ||
263ea090 | 1747 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1748 | if (!reply) |
1749 | return -ENOMEM; | |
ccb1352e JG |
1750 | |
1751 | err = -ENOMEM; | |
1752 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1753 | if (dp == NULL) | |
eec62ead | 1754 | goto err_destroy_reply; |
46df7b81 | 1755 | |
efd7ef1c | 1756 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1757 | |
1758 | /* Allocate table. */ | |
b637e498 PS |
1759 | err = ovs_flow_tbl_init(&dp->table); |
1760 | if (err) | |
eec62ead | 1761 | goto err_destroy_dp; |
ccb1352e | 1762 | |
eec62ead TZ |
1763 | err = ovs_dp_stats_init(dp); |
1764 | if (err) | |
ccb1352e | 1765 | goto err_destroy_table; |
ccb1352e | 1766 | |
eec62ead TZ |
1767 | err = ovs_dp_vport_init(dp); |
1768 | if (err) | |
1769 | goto err_destroy_stats; | |
15eac2a7 | 1770 | |
96fbc13d AZ |
1771 | err = ovs_meters_init(dp); |
1772 | if (err) | |
eec62ead | 1773 | goto err_destroy_ports; |
96fbc13d | 1774 | |
ccb1352e JG |
1775 | /* Set up our datapath device. */ |
1776 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1777 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1778 | parms.options = NULL; | |
1779 | parms.dp = dp; | |
1780 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1781 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1782 | |
6093ae9a JR |
1783 | /* So far only local changes have been made, now need the lock. */ |
1784 | ovs_lock(); | |
1785 | ||
fea07a48 EC |
1786 | err = ovs_dp_change(dp, a); |
1787 | if (err) | |
1788 | goto err_unlock_and_destroy_meters; | |
1789 | ||
ccb1352e JG |
1790 | vport = new_vport(&parms); |
1791 | if (IS_ERR(vport)) { | |
1792 | err = PTR_ERR(vport); | |
1793 | if (err == -EBUSY) | |
1794 | err = -EEXIST; | |
1795 | ||
44da5ae5 TG |
1796 | if (err == -EEXIST) { |
1797 | /* An outdated user space instance that does not understand | |
1798 | * the concept of user_features has attempted to create a new | |
1799 | * datapath and is likely to reuse it. Drop all user features. | |
1800 | */ | |
1801 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1802 | ovs_dp_reset_user_features(skb, info); | |
1803 | } | |
1804 | ||
a87406f4 | 1805 | goto err_destroy_portids; |
ccb1352e JG |
1806 | } |
1807 | ||
6093ae9a JR |
1808 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1809 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1810 | BUG_ON(err < 0); | |
ccb1352e | 1811 | |
46df7b81 | 1812 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1813 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1814 | |
1815 | ovs_unlock(); | |
ccb1352e | 1816 | |
2a94fe48 | 1817 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1818 | return 0; |
1819 | ||
a87406f4 AZ |
1820 | err_destroy_portids: |
1821 | kfree(rcu_dereference_raw(dp->upcall_portids)); | |
fea07a48 EC |
1822 | err_unlock_and_destroy_meters: |
1823 | ovs_unlock(); | |
96fbc13d | 1824 | ovs_meters_exit(dp); |
eec62ead | 1825 | err_destroy_ports: |
15eac2a7 | 1826 | kfree(dp->ports); |
eec62ead | 1827 | err_destroy_stats: |
ccb1352e JG |
1828 | free_percpu(dp->stats_percpu); |
1829 | err_destroy_table: | |
9b996e54 | 1830 | ovs_flow_tbl_destroy(&dp->table); |
eec62ead | 1831 | err_destroy_dp: |
ccb1352e | 1832 | kfree(dp); |
eec62ead | 1833 | err_destroy_reply: |
6093ae9a | 1834 | kfree_skb(reply); |
ccb1352e JG |
1835 | err: |
1836 | return err; | |
1837 | } | |
1838 | ||
8e4e1713 | 1839 | /* Called with ovs_mutex. */ |
46df7b81 | 1840 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1841 | { |
1f3a090b | 1842 | struct flow_table *table = &dp->table; |
15eac2a7 | 1843 | int i; |
ccb1352e | 1844 | |
35d39fec PB |
1845 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) |
1846 | tc_skb_ext_tc_disable(); | |
1847 | ||
15eac2a7 PS |
1848 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1849 | struct vport *vport; | |
b67bfe0d | 1850 | struct hlist_node *n; |
15eac2a7 | 1851 | |
b67bfe0d | 1852 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1853 | if (vport->port_no != OVSP_LOCAL) |
1854 | ovs_dp_detach_port(vport); | |
1855 | } | |
ccb1352e | 1856 | |
59a35d60 | 1857 | list_del_rcu(&dp->list_node); |
ccb1352e | 1858 | |
8e4e1713 | 1859 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1860 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1861 | */ |
8e4e1713 | 1862 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1863 | |
1f3a090b TZ |
1864 | /* Flush sw_flow in the tables. RCU cb only releases resource |
1865 | * such as dp, ports and tables. That may avoid some issues | |
1866 | * such as RCU usage warning. | |
1867 | */ | |
1868 | table_instance_flow_flush(table, ovsl_dereference(table->ti), | |
1869 | ovsl_dereference(table->ufid_ti)); | |
1870 | ||
1871 | /* RCU destroy the ports, meters and flow tables. */ | |
ccb1352e | 1872 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1873 | } |
1874 | ||
1875 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1876 | { | |
1877 | struct sk_buff *reply; | |
1878 | struct datapath *dp; | |
1879 | int err; | |
1880 | ||
263ea090 | 1881 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1882 | if (!reply) |
1883 | return -ENOMEM; | |
1884 | ||
8e4e1713 | 1885 | ovs_lock(); |
46df7b81 PS |
1886 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1887 | err = PTR_ERR(dp); | |
1888 | if (IS_ERR(dp)) | |
6093ae9a | 1889 | goto err_unlock_free; |
46df7b81 | 1890 | |
6093ae9a JR |
1891 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1892 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1893 | BUG_ON(err < 0); | |
46df7b81 PS |
1894 | |
1895 | __dp_destroy(dp); | |
8e4e1713 | 1896 | ovs_unlock(); |
ccb1352e | 1897 | |
2a94fe48 | 1898 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1899 | |
1900 | return 0; | |
6093ae9a JR |
1901 | |
1902 | err_unlock_free: | |
8e4e1713 | 1903 | ovs_unlock(); |
6093ae9a | 1904 | kfree_skb(reply); |
8e4e1713 | 1905 | return err; |
ccb1352e JG |
1906 | } |
1907 | ||
1908 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1909 | { | |
1910 | struct sk_buff *reply; | |
1911 | struct datapath *dp; | |
1912 | int err; | |
1913 | ||
263ea090 | 1914 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1915 | if (!reply) |
1916 | return -ENOMEM; | |
1917 | ||
8e4e1713 | 1918 | ovs_lock(); |
46df7b81 | 1919 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1920 | err = PTR_ERR(dp); |
ccb1352e | 1921 | if (IS_ERR(dp)) |
6093ae9a | 1922 | goto err_unlock_free; |
ccb1352e | 1923 | |
95a7233c PB |
1924 | err = ovs_dp_change(dp, info->attrs); |
1925 | if (err) | |
1926 | goto err_unlock_free; | |
43d4be9c | 1927 | |
6093ae9a | 1928 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1929 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1930 | BUG_ON(err < 0); |
ccb1352e | 1931 | |
8e4e1713 | 1932 | ovs_unlock(); |
2a94fe48 | 1933 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1934 | |
1935 | return 0; | |
6093ae9a JR |
1936 | |
1937 | err_unlock_free: | |
8e4e1713 | 1938 | ovs_unlock(); |
6093ae9a | 1939 | kfree_skb(reply); |
8e4e1713 | 1940 | return err; |
ccb1352e JG |
1941 | } |
1942 | ||
1943 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1944 | { | |
1945 | struct sk_buff *reply; | |
1946 | struct datapath *dp; | |
8e4e1713 | 1947 | int err; |
ccb1352e | 1948 | |
263ea090 | 1949 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1950 | if (!reply) |
1951 | return -ENOMEM; | |
1952 | ||
8ec609d8 | 1953 | ovs_lock(); |
46df7b81 | 1954 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1955 | if (IS_ERR(dp)) { |
1956 | err = PTR_ERR(dp); | |
6093ae9a | 1957 | goto err_unlock_free; |
8e4e1713 | 1958 | } |
6093ae9a | 1959 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1960 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1961 | BUG_ON(err < 0); |
8ec609d8 | 1962 | ovs_unlock(); |
ccb1352e JG |
1963 | |
1964 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1965 | |
6093ae9a | 1966 | err_unlock_free: |
8ec609d8 | 1967 | ovs_unlock(); |
6093ae9a | 1968 | kfree_skb(reply); |
8e4e1713 | 1969 | return err; |
ccb1352e JG |
1970 | } |
1971 | ||
1972 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1973 | { | |
46df7b81 | 1974 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1975 | struct datapath *dp; |
1976 | int skip = cb->args[0]; | |
1977 | int i = 0; | |
1978 | ||
8ec609d8 PS |
1979 | ovs_lock(); |
1980 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1981 | if (i >= skip && |
15e47304 | 1982 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1983 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1984 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1985 | break; |
1986 | i++; | |
1987 | } | |
8ec609d8 | 1988 | ovs_unlock(); |
ccb1352e JG |
1989 | |
1990 | cb->args[0] = i; | |
1991 | ||
1992 | return skb->len; | |
1993 | } | |
1994 | ||
0c200ef9 PS |
1995 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1996 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1997 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1998 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
9bf24f59 EC |
1999 | [OVS_DP_ATTR_MASKS_CACHE_SIZE] = NLA_POLICY_RANGE(NLA_U32, 0, |
2000 | PCPU_MIN_UNIT_SIZE / sizeof(struct mask_cache_entry)), | |
0c200ef9 PS |
2001 | }; |
2002 | ||
66a9b928 | 2003 | static const struct genl_small_ops dp_datapath_genl_ops[] = { |
ccb1352e | 2004 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 2005 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2006 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2007 | .doit = ovs_dp_cmd_new |
2008 | }, | |
2009 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 2010 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2011 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2012 | .doit = ovs_dp_cmd_del |
2013 | }, | |
2014 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 2015 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2016 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2017 | .doit = ovs_dp_cmd_get, |
2018 | .dumpit = ovs_dp_cmd_dump | |
2019 | }, | |
2020 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 2021 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2022 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2023 | .doit = ovs_dp_cmd_set, |
2024 | }, | |
2025 | }; | |
2026 | ||
56989f6d | 2027 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 2028 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
2029 | .name = OVS_DATAPATH_FAMILY, |
2030 | .version = OVS_DATAPATH_VERSION, | |
2031 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 2032 | .policy = datapath_policy, |
3a4e0d6a PS |
2033 | .netnsok = true, |
2034 | .parallel_ops = true, | |
66a9b928 JK |
2035 | .small_ops = dp_datapath_genl_ops, |
2036 | .n_small_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
0c200ef9 PS |
2037 | .mcgrps = &ovs_dp_datapath_multicast_group, |
2038 | .n_mcgrps = 1, | |
489111e5 | 2039 | .module = THIS_MODULE, |
ccb1352e JG |
2040 | }; |
2041 | ||
8e4e1713 | 2042 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 2043 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 | 2044 | struct net *net, u32 portid, u32 seq, |
d4e4fdf9 | 2045 | u32 flags, u8 cmd, gfp_t gfp) |
ccb1352e JG |
2046 | { |
2047 | struct ovs_header *ovs_header; | |
2048 | struct ovs_vport_stats vport_stats; | |
2049 | int err; | |
2050 | ||
15e47304 | 2051 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
2052 | flags, cmd); |
2053 | if (!ovs_header) | |
2054 | return -EMSGSIZE; | |
2055 | ||
2056 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
2057 | ||
028d6a67 DM |
2058 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
2059 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 2060 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
2061 | ovs_vport_name(vport)) || |
2062 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 2063 | goto nla_put_failure; |
ccb1352e | 2064 | |
9354d452 | 2065 | if (!net_eq(net, dev_net(vport->dev))) { |
d4e4fdf9 | 2066 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
9354d452 JB |
2067 | |
2068 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
2069 | goto nla_put_failure; | |
2070 | } | |
2071 | ||
ccb1352e | 2072 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
2073 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
2074 | sizeof(struct ovs_vport_stats), &vport_stats, | |
2075 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 2076 | goto nla_put_failure; |
ccb1352e | 2077 | |
5cd667b0 AW |
2078 | if (ovs_vport_get_upcall_portids(vport, skb)) |
2079 | goto nla_put_failure; | |
2080 | ||
ccb1352e JG |
2081 | err = ovs_vport_get_options(vport, skb); |
2082 | if (err == -EMSGSIZE) | |
2083 | goto error; | |
2084 | ||
053c095a JB |
2085 | genlmsg_end(skb, ovs_header); |
2086 | return 0; | |
ccb1352e JG |
2087 | |
2088 | nla_put_failure: | |
2089 | err = -EMSGSIZE; | |
2090 | error: | |
2091 | genlmsg_cancel(skb, ovs_header); | |
2092 | return err; | |
2093 | } | |
2094 | ||
6093ae9a JR |
2095 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
2096 | { | |
2097 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2098 | } | |
2099 | ||
2100 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
2101 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
2102 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
2103 | { |
2104 | struct sk_buff *skb; | |
2105 | int retval; | |
2106 | ||
d4e4fdf9 | 2107 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
ccb1352e JG |
2108 | if (!skb) |
2109 | return ERR_PTR(-ENOMEM); | |
2110 | ||
d4e4fdf9 GN |
2111 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
2112 | GFP_KERNEL); | |
a9341512 JG |
2113 | BUG_ON(retval < 0); |
2114 | ||
ccb1352e JG |
2115 | return skb; |
2116 | } | |
2117 | ||
8e4e1713 | 2118 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 2119 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 2120 | const struct ovs_header *ovs_header, |
ccb1352e JG |
2121 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
2122 | { | |
2123 | struct datapath *dp; | |
2124 | struct vport *vport; | |
2125 | ||
9354d452 JB |
2126 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2127 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 2128 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 2129 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
2130 | if (!vport) |
2131 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
2132 | if (ovs_header->dp_ifindex && |
2133 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2134 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
2135 | return vport; |
2136 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
2137 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
2138 | ||
2139 | if (port_no >= DP_MAX_PORTS) | |
2140 | return ERR_PTR(-EFBIG); | |
2141 | ||
46df7b81 | 2142 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
2143 | if (!dp) |
2144 | return ERR_PTR(-ENODEV); | |
2145 | ||
8e4e1713 | 2146 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 2147 | if (!vport) |
14408dba | 2148 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
2149 | return vport; |
2150 | } else | |
2151 | return ERR_PTR(-EINVAL); | |
9354d452 | 2152 | |
ccb1352e JG |
2153 | } |
2154 | ||
6b660c41 | 2155 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 2156 | { |
6b660c41 | 2157 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
2158 | struct net_device *dev; |
2159 | struct vport *vport; | |
2160 | int i; | |
2161 | ||
2162 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
53742e69 | 2163 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
cf3266ad | 2164 | lockdep_ovsl_is_held()) { |
3a927bc7 PA |
2165 | dev = vport->dev; |
2166 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2167 | if (dev_headroom > max_headroom) | |
2168 | max_headroom = dev_headroom; | |
2169 | } | |
2170 | } | |
2171 | ||
6b660c41 TY |
2172 | return max_headroom; |
2173 | } | |
2174 | ||
2175 | /* Called with ovs_mutex */ | |
2176 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2177 | { | |
2178 | struct vport *vport; | |
2179 | int i; | |
2180 | ||
2181 | dp->max_headroom = new_headroom; | |
cf3266ad | 2182 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
53742e69 | 2183 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
cf3266ad | 2184 | lockdep_ovsl_is_held()) |
6b660c41 | 2185 | netdev_set_rx_headroom(vport->dev, new_headroom); |
cf3266ad | 2186 | } |
3a927bc7 PA |
2187 | } |
2188 | ||
ccb1352e JG |
2189 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2190 | { | |
2191 | struct nlattr **a = info->attrs; | |
2192 | struct ovs_header *ovs_header = info->userhdr; | |
2193 | struct vport_parms parms; | |
2194 | struct sk_buff *reply; | |
2195 | struct vport *vport; | |
2196 | struct datapath *dp; | |
6b660c41 | 2197 | unsigned int new_headroom; |
ccb1352e JG |
2198 | u32 port_no; |
2199 | int err; | |
2200 | ||
ccb1352e JG |
2201 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2202 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2203 | return -EINVAL; |
9354d452 JB |
2204 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2205 | return -EOPNOTSUPP; | |
6093ae9a JR |
2206 | |
2207 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2208 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2209 | if (port_no >= DP_MAX_PORTS) | |
2210 | return -EFBIG; | |
2211 | ||
2212 | reply = ovs_vport_cmd_alloc_info(); | |
2213 | if (!reply) | |
2214 | return -ENOMEM; | |
ccb1352e | 2215 | |
8e4e1713 | 2216 | ovs_lock(); |
62b9c8d0 | 2217 | restart: |
46df7b81 | 2218 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2219 | err = -ENODEV; |
2220 | if (!dp) | |
6093ae9a | 2221 | goto exit_unlock_free; |
ccb1352e | 2222 | |
6093ae9a | 2223 | if (port_no) { |
8e4e1713 | 2224 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2225 | err = -EBUSY; |
2226 | if (vport) | |
6093ae9a | 2227 | goto exit_unlock_free; |
ccb1352e JG |
2228 | } else { |
2229 | for (port_no = 1; ; port_no++) { | |
2230 | if (port_no >= DP_MAX_PORTS) { | |
2231 | err = -EFBIG; | |
6093ae9a | 2232 | goto exit_unlock_free; |
ccb1352e | 2233 | } |
8e4e1713 | 2234 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2235 | if (!vport) |
2236 | break; | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2241 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2242 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2243 | parms.dp = dp; | |
2244 | parms.port_no = port_no; | |
5cd667b0 | 2245 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2246 | |
2247 | vport = new_vport(&parms); | |
2248 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2249 | if (IS_ERR(vport)) { |
2250 | if (err == -EAGAIN) | |
2251 | goto restart; | |
6093ae9a | 2252 | goto exit_unlock_free; |
62b9c8d0 | 2253 | } |
ccb1352e | 2254 | |
9354d452 JB |
2255 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2256 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2257 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
3a927bc7 | 2258 | |
6b660c41 TY |
2259 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2260 | ||
2261 | if (new_headroom > dp->max_headroom) | |
2262 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2263 | else |
2264 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2265 | ||
6093ae9a JR |
2266 | BUG_ON(err < 0); |
2267 | ovs_unlock(); | |
ed661185 | 2268 | |
2a94fe48 | 2269 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2270 | return 0; |
ccb1352e | 2271 | |
6093ae9a | 2272 | exit_unlock_free: |
8e4e1713 | 2273 | ovs_unlock(); |
6093ae9a | 2274 | kfree_skb(reply); |
ccb1352e JG |
2275 | return err; |
2276 | } | |
2277 | ||
2278 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2279 | { | |
2280 | struct nlattr **a = info->attrs; | |
2281 | struct sk_buff *reply; | |
2282 | struct vport *vport; | |
2283 | int err; | |
2284 | ||
6093ae9a JR |
2285 | reply = ovs_vport_cmd_alloc_info(); |
2286 | if (!reply) | |
2287 | return -ENOMEM; | |
2288 | ||
8e4e1713 | 2289 | ovs_lock(); |
46df7b81 | 2290 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2291 | err = PTR_ERR(vport); |
2292 | if (IS_ERR(vport)) | |
6093ae9a | 2293 | goto exit_unlock_free; |
ccb1352e | 2294 | |
ccb1352e | 2295 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2296 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2297 | err = -EINVAL; |
6093ae9a | 2298 | goto exit_unlock_free; |
a9341512 JG |
2299 | } |
2300 | ||
f44f3408 | 2301 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2302 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2303 | if (err) |
6093ae9a | 2304 | goto exit_unlock_free; |
f44f3408 | 2305 | } |
a9341512 | 2306 | |
5cd667b0 AW |
2307 | |
2308 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2309 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2310 | ||
2311 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2312 | if (err) | |
2313 | goto exit_unlock_free; | |
2314 | } | |
ccb1352e | 2315 | |
9354d452 JB |
2316 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2317 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2318 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
a9341512 | 2319 | BUG_ON(err < 0); |
ccb1352e | 2320 | |
8e4e1713 | 2321 | ovs_unlock(); |
2a94fe48 | 2322 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2323 | return 0; |
ccb1352e | 2324 | |
6093ae9a | 2325 | exit_unlock_free: |
8e4e1713 | 2326 | ovs_unlock(); |
6093ae9a | 2327 | kfree_skb(reply); |
ccb1352e JG |
2328 | return err; |
2329 | } | |
2330 | ||
2331 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2332 | { | |
6b660c41 | 2333 | bool update_headroom = false; |
ccb1352e JG |
2334 | struct nlattr **a = info->attrs; |
2335 | struct sk_buff *reply; | |
3a927bc7 | 2336 | struct datapath *dp; |
ccb1352e | 2337 | struct vport *vport; |
6b660c41 | 2338 | unsigned int new_headroom; |
ccb1352e JG |
2339 | int err; |
2340 | ||
6093ae9a JR |
2341 | reply = ovs_vport_cmd_alloc_info(); |
2342 | if (!reply) | |
2343 | return -ENOMEM; | |
2344 | ||
8e4e1713 | 2345 | ovs_lock(); |
46df7b81 | 2346 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2347 | err = PTR_ERR(vport); |
2348 | if (IS_ERR(vport)) | |
6093ae9a | 2349 | goto exit_unlock_free; |
ccb1352e JG |
2350 | |
2351 | if (vport->port_no == OVSP_LOCAL) { | |
2352 | err = -EINVAL; | |
6093ae9a | 2353 | goto exit_unlock_free; |
ccb1352e JG |
2354 | } |
2355 | ||
9354d452 JB |
2356 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2357 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2358 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
6093ae9a | 2359 | BUG_ON(err < 0); |
3a927bc7 PA |
2360 | |
2361 | /* the vport deletion may trigger dp headroom update */ | |
2362 | dp = vport->dp; | |
2363 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2364 | update_headroom = true; |
2365 | ||
3a927bc7 | 2366 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2367 | ovs_dp_detach_port(vport); |
3a927bc7 | 2368 | |
6b660c41 TY |
2369 | if (update_headroom) { |
2370 | new_headroom = ovs_get_max_headroom(dp); | |
2371 | ||
2372 | if (new_headroom < dp->max_headroom) | |
2373 | ovs_update_headroom(dp, new_headroom); | |
2374 | } | |
6093ae9a | 2375 | ovs_unlock(); |
ccb1352e | 2376 | |
2a94fe48 | 2377 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2378 | return 0; |
ccb1352e | 2379 | |
6093ae9a | 2380 | exit_unlock_free: |
8e4e1713 | 2381 | ovs_unlock(); |
6093ae9a | 2382 | kfree_skb(reply); |
ccb1352e JG |
2383 | return err; |
2384 | } | |
2385 | ||
2386 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2387 | { | |
2388 | struct nlattr **a = info->attrs; | |
2389 | struct ovs_header *ovs_header = info->userhdr; | |
2390 | struct sk_buff *reply; | |
2391 | struct vport *vport; | |
2392 | int err; | |
2393 | ||
6093ae9a JR |
2394 | reply = ovs_vport_cmd_alloc_info(); |
2395 | if (!reply) | |
2396 | return -ENOMEM; | |
2397 | ||
ccb1352e | 2398 | rcu_read_lock(); |
46df7b81 | 2399 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2400 | err = PTR_ERR(vport); |
2401 | if (IS_ERR(vport)) | |
6093ae9a | 2402 | goto exit_unlock_free; |
9354d452 JB |
2403 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2404 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2405 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
6093ae9a | 2406 | BUG_ON(err < 0); |
ccb1352e JG |
2407 | rcu_read_unlock(); |
2408 | ||
2409 | return genlmsg_reply(reply, info); | |
2410 | ||
6093ae9a | 2411 | exit_unlock_free: |
ccb1352e | 2412 | rcu_read_unlock(); |
6093ae9a | 2413 | kfree_skb(reply); |
ccb1352e JG |
2414 | return err; |
2415 | } | |
2416 | ||
2417 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2418 | { | |
2419 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2420 | struct datapath *dp; | |
15eac2a7 PS |
2421 | int bucket = cb->args[0], skip = cb->args[1]; |
2422 | int i, j = 0; | |
ccb1352e | 2423 | |
42ee19e2 | 2424 | rcu_read_lock(); |
cc3a5ae6 | 2425 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2426 | if (!dp) { |
2427 | rcu_read_unlock(); | |
ccb1352e | 2428 | return -ENODEV; |
42ee19e2 | 2429 | } |
15eac2a7 | 2430 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2431 | struct vport *vport; |
15eac2a7 PS |
2432 | |
2433 | j = 0; | |
b67bfe0d | 2434 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2435 | if (j >= skip && |
2436 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2437 | sock_net(skb->sk), |
15e47304 | 2438 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2439 | cb->nlh->nlmsg_seq, |
2440 | NLM_F_MULTI, | |
d4e4fdf9 GN |
2441 | OVS_VPORT_CMD_GET, |
2442 | GFP_ATOMIC) < 0) | |
15eac2a7 PS |
2443 | goto out; |
2444 | ||
2445 | j++; | |
2446 | } | |
2447 | skip = 0; | |
ccb1352e | 2448 | } |
15eac2a7 | 2449 | out: |
ccb1352e JG |
2450 | rcu_read_unlock(); |
2451 | ||
15eac2a7 PS |
2452 | cb->args[0] = i; |
2453 | cb->args[1] = j; | |
ccb1352e | 2454 | |
15eac2a7 | 2455 | return skb->len; |
ccb1352e JG |
2456 | } |
2457 | ||
eac87c41 EC |
2458 | static void ovs_dp_masks_rebalance(struct work_struct *work) |
2459 | { | |
a65878d6 EC |
2460 | struct ovs_net *ovs_net = container_of(work, struct ovs_net, |
2461 | masks_rebalance.work); | |
2462 | struct datapath *dp; | |
eac87c41 EC |
2463 | |
2464 | ovs_lock(); | |
a65878d6 EC |
2465 | |
2466 | list_for_each_entry(dp, &ovs_net->dps, list_node) | |
2467 | ovs_flow_masks_rebalance(&dp->table); | |
2468 | ||
eac87c41 EC |
2469 | ovs_unlock(); |
2470 | ||
a65878d6 | 2471 | schedule_delayed_work(&ovs_net->masks_rebalance, |
eac87c41 EC |
2472 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); |
2473 | } | |
2474 | ||
0c200ef9 PS |
2475 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2476 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2477 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2478 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2479 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
ea8564c8 | 2480 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
0c200ef9 | 2481 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
9354d452 JB |
2482 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2483 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2484 | }; |
2485 | ||
66a9b928 | 2486 | static const struct genl_small_ops dp_vport_genl_ops[] = { |
ccb1352e | 2487 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2488 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2489 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2490 | .doit = ovs_vport_cmd_new |
2491 | }, | |
2492 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2493 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2494 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2495 | .doit = ovs_vport_cmd_del |
2496 | }, | |
2497 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2498 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2499 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2500 | .doit = ovs_vport_cmd_get, |
2501 | .dumpit = ovs_vport_cmd_dump | |
2502 | }, | |
2503 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2504 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2505 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2506 | .doit = ovs_vport_cmd_set, |
2507 | }, | |
2508 | }; | |
2509 | ||
56989f6d | 2510 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2511 | .hdrsize = sizeof(struct ovs_header), |
2512 | .name = OVS_VPORT_FAMILY, | |
2513 | .version = OVS_VPORT_VERSION, | |
2514 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2515 | .policy = vport_policy, |
0c200ef9 PS |
2516 | .netnsok = true, |
2517 | .parallel_ops = true, | |
66a9b928 JK |
2518 | .small_ops = dp_vport_genl_ops, |
2519 | .n_small_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
0c200ef9 PS |
2520 | .mcgrps = &ovs_dp_vport_multicast_group, |
2521 | .n_mcgrps = 1, | |
489111e5 | 2522 | .module = THIS_MODULE, |
ccb1352e JG |
2523 | }; |
2524 | ||
0c200ef9 PS |
2525 | static struct genl_family * const dp_genl_families[] = { |
2526 | &dp_datapath_genl_family, | |
2527 | &dp_vport_genl_family, | |
2528 | &dp_flow_genl_family, | |
2529 | &dp_packet_genl_family, | |
96fbc13d | 2530 | &dp_meter_genl_family, |
11efd5cb YHW |
2531 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2532 | &dp_ct_limit_genl_family, | |
2533 | #endif | |
ccb1352e JG |
2534 | }; |
2535 | ||
2536 | static void dp_unregister_genl(int n_families) | |
2537 | { | |
2538 | int i; | |
2539 | ||
2540 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2541 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2542 | } |
2543 | ||
56989f6d | 2544 | static int __init dp_register_genl(void) |
ccb1352e | 2545 | { |
ccb1352e JG |
2546 | int err; |
2547 | int i; | |
2548 | ||
ccb1352e | 2549 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2550 | |
0c200ef9 | 2551 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2552 | if (err) |
2553 | goto error; | |
ccb1352e JG |
2554 | } |
2555 | ||
2556 | return 0; | |
2557 | ||
2558 | error: | |
0c200ef9 | 2559 | dp_unregister_genl(i); |
ccb1352e JG |
2560 | return err; |
2561 | } | |
2562 | ||
46df7b81 PS |
2563 | static int __net_init ovs_init_net(struct net *net) |
2564 | { | |
2565 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
e0afe914 | 2566 | int err; |
46df7b81 PS |
2567 | |
2568 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2569 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
a65878d6 | 2570 | INIT_DELAYED_WORK(&ovs_net->masks_rebalance, ovs_dp_masks_rebalance); |
e0afe914 EC |
2571 | |
2572 | err = ovs_ct_init(net); | |
2573 | if (err) | |
2574 | return err; | |
2575 | ||
a65878d6 EC |
2576 | schedule_delayed_work(&ovs_net->masks_rebalance, |
2577 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); | |
e0afe914 | 2578 | return 0; |
46df7b81 PS |
2579 | } |
2580 | ||
7b4577a9 PS |
2581 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2582 | struct list_head *head) | |
46df7b81 | 2583 | { |
8e4e1713 | 2584 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2585 | struct datapath *dp; |
2586 | ||
2587 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2588 | int i; | |
2589 | ||
2590 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2591 | struct vport *vport; | |
2592 | ||
2593 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2594 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2595 | continue; | |
2596 | ||
be4ace6e | 2597 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2598 | list_add(&vport->detach_list, head); |
2599 | } | |
2600 | } | |
2601 | } | |
2602 | } | |
2603 | ||
2604 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2605 | { | |
2606 | struct datapath *dp, *dp_next; | |
2607 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2608 | struct vport *vport, *vport_next; | |
2609 | struct net *net; | |
2610 | LIST_HEAD(head); | |
46df7b81 | 2611 | |
8e4e1713 | 2612 | ovs_lock(); |
27de77ce TZ |
2613 | |
2614 | ovs_ct_exit(dnet); | |
2615 | ||
46df7b81 PS |
2616 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2617 | __dp_destroy(dp); | |
7b4577a9 | 2618 | |
f0b07bb1 | 2619 | down_read(&net_rwsem); |
7b4577a9 PS |
2620 | for_each_net(net) |
2621 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2622 | up_read(&net_rwsem); |
7b4577a9 PS |
2623 | |
2624 | /* Detach all vports from given namespace. */ | |
2625 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2626 | list_del(&vport->detach_list); | |
2627 | ovs_dp_detach_port(vport); | |
2628 | } | |
2629 | ||
8e4e1713 PS |
2630 | ovs_unlock(); |
2631 | ||
a65878d6 | 2632 | cancel_delayed_work_sync(&ovs_net->masks_rebalance); |
8e4e1713 | 2633 | cancel_work_sync(&ovs_net->dp_notify_work); |
46df7b81 PS |
2634 | } |
2635 | ||
2636 | static struct pernet_operations ovs_net_ops = { | |
2637 | .init = ovs_init_net, | |
2638 | .exit = ovs_exit_net, | |
2639 | .id = &ovs_net_id, | |
2640 | .size = sizeof(struct ovs_net), | |
2641 | }; | |
2642 | ||
ccb1352e JG |
2643 | static int __init dp_init(void) |
2644 | { | |
ccb1352e JG |
2645 | int err; |
2646 | ||
cf3266ad TZ |
2647 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > |
2648 | sizeof_field(struct sk_buff, cb)); | |
ccb1352e JG |
2649 | |
2650 | pr_info("Open vSwitch switching datapath\n"); | |
2651 | ||
971427f3 | 2652 | err = action_fifos_init(); |
ccb1352e JG |
2653 | if (err) |
2654 | goto error; | |
2655 | ||
971427f3 AZ |
2656 | err = ovs_internal_dev_rtnl_link_register(); |
2657 | if (err) | |
2658 | goto error_action_fifos_exit; | |
2659 | ||
5b9e7e16 JP |
2660 | err = ovs_flow_init(); |
2661 | if (err) | |
2662 | goto error_unreg_rtnl_link; | |
2663 | ||
ccb1352e JG |
2664 | err = ovs_vport_init(); |
2665 | if (err) | |
2666 | goto error_flow_exit; | |
2667 | ||
46df7b81 | 2668 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2669 | if (err) |
2670 | goto error_vport_exit; | |
2671 | ||
46df7b81 PS |
2672 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2673 | if (err) | |
2674 | goto error_netns_exit; | |
2675 | ||
62b9c8d0 TG |
2676 | err = ovs_netdev_init(); |
2677 | if (err) | |
2678 | goto error_unreg_notifier; | |
2679 | ||
ccb1352e JG |
2680 | err = dp_register_genl(); |
2681 | if (err < 0) | |
62b9c8d0 | 2682 | goto error_unreg_netdev; |
ccb1352e | 2683 | |
ccb1352e JG |
2684 | return 0; |
2685 | ||
62b9c8d0 TG |
2686 | error_unreg_netdev: |
2687 | ovs_netdev_exit(); | |
ccb1352e JG |
2688 | error_unreg_notifier: |
2689 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2690 | error_netns_exit: |
2691 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2692 | error_vport_exit: |
2693 | ovs_vport_exit(); | |
2694 | error_flow_exit: | |
2695 | ovs_flow_exit(); | |
5b9e7e16 JP |
2696 | error_unreg_rtnl_link: |
2697 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2698 | error_action_fifos_exit: |
2699 | action_fifos_exit(); | |
ccb1352e JG |
2700 | error: |
2701 | return err; | |
2702 | } | |
2703 | ||
2704 | static void dp_cleanup(void) | |
2705 | { | |
ccb1352e | 2706 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2707 | ovs_netdev_exit(); |
ccb1352e | 2708 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2709 | unregister_pernet_device(&ovs_net_ops); |
2710 | rcu_barrier(); | |
ccb1352e JG |
2711 | ovs_vport_exit(); |
2712 | ovs_flow_exit(); | |
5b9e7e16 | 2713 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2714 | action_fifos_exit(); |
ccb1352e JG |
2715 | } |
2716 | ||
2717 | module_init(dp_init); | |
2718 | module_exit(dp_cleanup); | |
2719 | ||
2720 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2721 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2722 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2723 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2724 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2725 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2726 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2727 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |