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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ccb1352e | 2 | /* |
ad552007 | 3 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/if_arp.h> | |
11 | #include <linux/if_vlan.h> | |
12 | #include <linux/in.h> | |
13 | #include <linux/ip.h> | |
14 | #include <linux/jhash.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/genetlink.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/percpu.h> | |
23 | #include <linux/rcupdate.h> | |
24 | #include <linux/tcp.h> | |
25 | #include <linux/udp.h> | |
ccb1352e JG |
26 | #include <linux/ethtool.h> |
27 | #include <linux/wait.h> | |
ccb1352e JG |
28 | #include <asm/div64.h> |
29 | #include <linux/highmem.h> | |
30 | #include <linux/netfilter_bridge.h> | |
31 | #include <linux/netfilter_ipv4.h> | |
32 | #include <linux/inetdevice.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/openvswitch.h> | |
35 | #include <linux/rculist.h> | |
36 | #include <linux/dmi.h> | |
ccb1352e | 37 | #include <net/genetlink.h> |
46df7b81 PS |
38 | #include <net/net_namespace.h> |
39 | #include <net/netns/generic.h> | |
ccb1352e JG |
40 | |
41 | #include "datapath.h" | |
42 | #include "flow.h" | |
e80857cc | 43 | #include "flow_table.h" |
e6445719 | 44 | #include "flow_netlink.h" |
96fbc13d | 45 | #include "meter.h" |
ccb1352e | 46 | #include "vport-internal_dev.h" |
cff63a52 | 47 | #include "vport-netdev.h" |
ccb1352e | 48 | |
c7d03a00 | 49 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 50 | |
0c200ef9 PS |
51 | static struct genl_family dp_packet_genl_family; |
52 | static struct genl_family dp_flow_genl_family; | |
53 | static struct genl_family dp_datapath_genl_family; | |
54 | ||
74ed7ab9 JS |
55 | static const struct nla_policy flow_policy[]; |
56 | ||
48e48a70 | 57 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
58 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
59 | }; |
60 | ||
48e48a70 | 61 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
62 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
63 | }; |
64 | ||
48e48a70 | 65 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
66 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
67 | }; |
68 | ||
fb5d1e9e JR |
69 | /* Check if need to build a reply message. |
70 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
71 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
72 | unsigned int group) | |
fb5d1e9e JR |
73 | { |
74 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 75 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
76 | } |
77 | ||
68eb5503 | 78 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 79 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 80 | { |
92c14d9b | 81 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
82 | } |
83 | ||
ccb1352e JG |
84 | /** |
85 | * DOC: Locking: | |
86 | * | |
8e4e1713 PS |
87 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
88 | * operations on vports, etc.), Writes to other state (flow table | |
89 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
90 | * by ovs_lock. | |
ccb1352e JG |
91 | * |
92 | * Reads are protected by RCU. | |
93 | * | |
94 | * There are a few special cases (mostly stats) that have their own | |
95 | * synchronization but they nest under all of above and don't interact with | |
96 | * each other. | |
8e4e1713 PS |
97 | * |
98 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
99 | */ |
100 | ||
8e4e1713 PS |
101 | static DEFINE_MUTEX(ovs_mutex); |
102 | ||
103 | void ovs_lock(void) | |
104 | { | |
105 | mutex_lock(&ovs_mutex); | |
106 | } | |
107 | ||
108 | void ovs_unlock(void) | |
109 | { | |
110 | mutex_unlock(&ovs_mutex); | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_LOCKDEP | |
114 | int lockdep_ovsl_is_held(void) | |
115 | { | |
116 | if (debug_locks) | |
117 | return lockdep_is_held(&ovs_mutex); | |
118 | else | |
119 | return 1; | |
120 | } | |
121 | #endif | |
122 | ||
ccb1352e | 123 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 124 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 125 | const struct sw_flow_key *, |
f2a4d086 WT |
126 | const struct dp_upcall_info *, |
127 | uint32_t cutlen); | |
8055a89c | 128 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 129 | const struct sw_flow_key *, |
f2a4d086 WT |
130 | const struct dp_upcall_info *, |
131 | uint32_t cutlen); | |
ccb1352e | 132 | |
8e4e1713 | 133 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 134 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 135 | { |
8e4e1713 | 136 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 137 | return ovs_vport_name(vport); |
ccb1352e JG |
138 | } |
139 | ||
12eb18f7 | 140 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
141 | { |
142 | struct vport *local; | |
143 | int ifindex; | |
144 | ||
145 | rcu_read_lock(); | |
146 | ||
15eac2a7 | 147 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 148 | if (local) |
be4ace6e | 149 | ifindex = local->dev->ifindex; |
ccb1352e JG |
150 | else |
151 | ifindex = 0; | |
152 | ||
153 | rcu_read_unlock(); | |
154 | ||
155 | return ifindex; | |
156 | } | |
157 | ||
158 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
159 | { | |
160 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
161 | ||
9b996e54 | 162 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 163 | free_percpu(dp->stats_percpu); |
15eac2a7 | 164 | kfree(dp->ports); |
96fbc13d | 165 | ovs_meters_exit(dp); |
ccb1352e JG |
166 | kfree(dp); |
167 | } | |
168 | ||
15eac2a7 PS |
169 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
170 | u16 port_no) | |
171 | { | |
172 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
173 | } | |
174 | ||
bb6f9a70 | 175 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
176 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
177 | { | |
178 | struct vport *vport; | |
15eac2a7 PS |
179 | struct hlist_head *head; |
180 | ||
181 | head = vport_hash_bucket(dp, port_no); | |
53742e69 MB |
182 | hlist_for_each_entry_rcu(vport, head, dp_hash_node, |
183 | lockdep_ovsl_is_held()) { | |
15eac2a7 PS |
184 | if (vport->port_no == port_no) |
185 | return vport; | |
186 | } | |
187 | return NULL; | |
188 | } | |
189 | ||
8e4e1713 | 190 | /* Called with ovs_mutex. */ |
ccb1352e JG |
191 | static struct vport *new_vport(const struct vport_parms *parms) |
192 | { | |
193 | struct vport *vport; | |
194 | ||
195 | vport = ovs_vport_add(parms); | |
196 | if (!IS_ERR(vport)) { | |
197 | struct datapath *dp = parms->dp; | |
15eac2a7 | 198 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 199 | |
15eac2a7 | 200 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 201 | } |
ccb1352e JG |
202 | return vport; |
203 | } | |
204 | ||
ccb1352e JG |
205 | void ovs_dp_detach_port(struct vport *p) |
206 | { | |
8e4e1713 | 207 | ASSERT_OVSL(); |
ccb1352e JG |
208 | |
209 | /* First drop references to device. */ | |
15eac2a7 | 210 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
211 | |
212 | /* Then destroy it. */ | |
213 | ovs_vport_del(p); | |
214 | } | |
215 | ||
216 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 217 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 218 | { |
83c8df26 | 219 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
220 | struct datapath *dp = p->dp; |
221 | struct sw_flow *flow; | |
d98612b8 | 222 | struct sw_flow_actions *sf_acts; |
ccb1352e | 223 | struct dp_stats_percpu *stats; |
ccb1352e | 224 | u64 *stats_counter; |
1bd7116f | 225 | u32 n_mask_hit; |
aa733660 | 226 | int error; |
ccb1352e | 227 | |
404f2f10 | 228 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 229 | |
ccb1352e | 230 | /* Look up flow. */ |
04b7d136 TZ |
231 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
232 | &n_mask_hit); | |
ccb1352e JG |
233 | if (unlikely(!flow)) { |
234 | struct dp_upcall_info upcall; | |
235 | ||
ccea7445 | 236 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 237 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 238 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 239 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 240 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
241 | if (unlikely(error)) |
242 | kfree_skb(skb); | |
243 | else | |
244 | consume_skb(skb); | |
ccb1352e JG |
245 | stats_counter = &stats->n_missed; |
246 | goto out; | |
247 | } | |
248 | ||
d98612b8 LJ |
249 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
250 | sf_acts = rcu_dereference(flow->sf_acts); | |
aa733660 YS |
251 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
252 | if (unlikely(error)) | |
253 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
254 | ovs_dp_name(dp), error); | |
ccb1352e | 255 | |
e298e505 | 256 | stats_counter = &stats->n_hit; |
ccb1352e JG |
257 | |
258 | out: | |
259 | /* Update datapath statistics. */ | |
df9d9fdf | 260 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 261 | (*stats_counter)++; |
1bd7116f | 262 | stats->n_mask_hit += n_mask_hit; |
df9d9fdf | 263 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
264 | } |
265 | ||
ccb1352e | 266 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 267 | const struct sw_flow_key *key, |
f2a4d086 WT |
268 | const struct dp_upcall_info *upcall_info, |
269 | uint32_t cutlen) | |
ccb1352e JG |
270 | { |
271 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
272 | int err; |
273 | ||
15e47304 | 274 | if (upcall_info->portid == 0) { |
ccb1352e JG |
275 | err = -ENOTCONN; |
276 | goto err; | |
277 | } | |
278 | ||
ccb1352e | 279 | if (!skb_is_gso(skb)) |
f2a4d086 | 280 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 281 | else |
f2a4d086 | 282 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
283 | if (err) |
284 | goto err; | |
285 | ||
286 | return 0; | |
287 | ||
288 | err: | |
404f2f10 | 289 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 290 | |
df9d9fdf | 291 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 292 | stats->n_lost++; |
df9d9fdf | 293 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
294 | |
295 | return err; | |
296 | } | |
297 | ||
8055a89c | 298 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 299 | const struct sw_flow_key *key, |
f2a4d086 WT |
300 | const struct dp_upcall_info *upcall_info, |
301 | uint32_t cutlen) | |
ccb1352e | 302 | { |
2734166e | 303 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 304 | struct sw_flow_key later_key; |
ccb1352e JG |
305 | struct sk_buff *segs, *nskb; |
306 | int err; | |
307 | ||
a08e7fd9 | 308 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_GSO_CB_OFFSET); |
09c5e605 | 309 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
310 | if (IS_ERR(segs)) |
311 | return PTR_ERR(segs); | |
330966e5 FW |
312 | if (segs == NULL) |
313 | return -EINVAL; | |
ccb1352e | 314 | |
0c19f846 WB |
315 | if (gso_type & SKB_GSO_UDP) { |
316 | /* The initial flow key extracted by ovs_flow_key_extract() | |
317 | * in this case is for a first fragment, so we need to | |
318 | * properly mark later fragments. | |
319 | */ | |
320 | later_key = *key; | |
321 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
322 | } | |
323 | ||
ccb1352e | 324 | /* Queue all of the segments. */ |
2cec4448 | 325 | skb_list_walk_safe(segs, skb, nskb) { |
0c19f846 WB |
326 | if (gso_type & SKB_GSO_UDP && skb != segs) |
327 | key = &later_key; | |
328 | ||
f2a4d086 | 329 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
330 | if (err) |
331 | break; | |
332 | ||
2cec4448 | 333 | } |
ccb1352e JG |
334 | |
335 | /* Free all of the segments. */ | |
2cec4448 | 336 | skb_list_walk_safe(segs, skb, nskb) { |
ccb1352e JG |
337 | if (err) |
338 | kfree_skb(skb); | |
339 | else | |
340 | consume_skb(skb); | |
2cec4448 | 341 | } |
ccb1352e JG |
342 | return err; |
343 | } | |
344 | ||
8f0aad6f | 345 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 346 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
347 | { |
348 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 349 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 | 350 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
bd1903b7 TZ |
351 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ |
352 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
c3ff8cfe TG |
353 | |
354 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
355 | if (upcall_info->userdata) |
356 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
357 | ||
358 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
359 | if (upcall_info->egress_tun_info) | |
360 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 361 | |
ccea7445 NM |
362 | /* OVS_PACKET_ATTR_ACTIONS */ |
363 | if (upcall_info->actions_len) | |
494bea39 | 364 | size += nla_total_size(actions_attrlen); |
ccea7445 | 365 | |
7f8a436e JS |
366 | /* OVS_PACKET_ATTR_MRU */ |
367 | if (upcall_info->mru) | |
368 | size += nla_total_size(sizeof(upcall_info->mru)); | |
369 | ||
c3ff8cfe TG |
370 | return size; |
371 | } | |
372 | ||
7f8a436e JS |
373 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
374 | { | |
375 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
376 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
377 | ||
378 | if (plen > 0) | |
b080db58 | 379 | skb_put_zero(skb, plen); |
7f8a436e JS |
380 | } |
381 | } | |
382 | ||
8055a89c | 383 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 384 | const struct sw_flow_key *key, |
f2a4d086 WT |
385 | const struct dp_upcall_info *upcall_info, |
386 | uint32_t cutlen) | |
ccb1352e JG |
387 | { |
388 | struct ovs_header *upcall; | |
389 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 390 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 391 | struct nlattr *nla; |
795449d8 | 392 | size_t len; |
bda56f14 | 393 | unsigned int hlen; |
8055a89c | 394 | int err, dp_ifindex; |
bd1903b7 | 395 | u64 hash; |
8055a89c TG |
396 | |
397 | dp_ifindex = get_dpifindex(dp); | |
398 | if (!dp_ifindex) | |
399 | return -ENODEV; | |
ccb1352e | 400 | |
df8a39de | 401 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
402 | nskb = skb_clone(skb, GFP_ATOMIC); |
403 | if (!nskb) | |
404 | return -ENOMEM; | |
405 | ||
5968250c | 406 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 407 | if (!nskb) |
ccb1352e JG |
408 | return -ENOMEM; |
409 | ||
ccb1352e JG |
410 | skb = nskb; |
411 | } | |
412 | ||
413 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
414 | err = -EFBIG; | |
415 | goto out; | |
416 | } | |
417 | ||
bda56f14 TG |
418 | /* Complete checksum if needed */ |
419 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 420 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
421 | goto out; |
422 | ||
423 | /* Older versions of OVS user space enforce alignment of the last | |
424 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
425 | * padding logic. Only perform zerocopy if padding is not required. | |
426 | */ | |
427 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
428 | hlen = skb_zerocopy_headlen(skb); | |
429 | else | |
430 | hlen = skb->len; | |
431 | ||
494bea39 LZ |
432 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
433 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 434 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
435 | if (!user_skb) { |
436 | err = -ENOMEM; | |
437 | goto out; | |
438 | } | |
439 | ||
440 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
441 | 0, upcall_info->cmd); | |
6f19893b KL |
442 | if (!upcall) { |
443 | err = -EINVAL; | |
444 | goto out; | |
445 | } | |
ccb1352e JG |
446 | upcall->dp_ifindex = dp_ifindex; |
447 | ||
5b4237bb | 448 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
449 | if (err) |
450 | goto out; | |
ccb1352e JG |
451 | |
452 | if (upcall_info->userdata) | |
4490108b BP |
453 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
454 | nla_len(upcall_info->userdata), | |
455 | nla_data(upcall_info->userdata)); | |
ccb1352e | 456 | |
8f0aad6f | 457 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
458 | nla = nla_nest_start_noflag(user_skb, |
459 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
460 | if (!nla) { |
461 | err = -EMSGSIZE; | |
462 | goto out; | |
463 | } | |
fc4099f1 PS |
464 | err = ovs_nla_put_tunnel_info(user_skb, |
465 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
466 | if (err) |
467 | goto out; | |
468 | ||
8f0aad6f WZ |
469 | nla_nest_end(user_skb, nla); |
470 | } | |
471 | ||
ccea7445 | 472 | if (upcall_info->actions_len) { |
ae0be8de | 473 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
474 | if (!nla) { |
475 | err = -EMSGSIZE; | |
476 | goto out; | |
477 | } | |
ccea7445 NM |
478 | err = ovs_nla_put_actions(upcall_info->actions, |
479 | upcall_info->actions_len, | |
480 | user_skb); | |
481 | if (!err) | |
482 | nla_nest_end(user_skb, nla); | |
483 | else | |
484 | nla_nest_cancel(user_skb, nla); | |
485 | } | |
486 | ||
7f8a436e | 487 | /* Add OVS_PACKET_ATTR_MRU */ |
61ca533c TZ |
488 | if (upcall_info->mru && |
489 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
490 | err = -ENOBUFS; | |
491 | goto out; | |
7f8a436e JS |
492 | } |
493 | ||
b95e5928 | 494 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
61ca533c TZ |
495 | if (cutlen > 0 && |
496 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
497 | err = -ENOBUFS; | |
498 | goto out; | |
b95e5928 WT |
499 | } |
500 | ||
bd1903b7 TZ |
501 | /* Add OVS_PACKET_ATTR_HASH */ |
502 | hash = skb_get_hash_raw(skb); | |
503 | if (skb->sw_hash) | |
504 | hash |= OVS_PACKET_HASH_SW_BIT; | |
505 | ||
506 | if (skb->l4_hash) | |
507 | hash |= OVS_PACKET_HASH_L4_BIT; | |
508 | ||
509 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
510 | err = -ENOBUFS; | |
511 | goto out; | |
512 | } | |
513 | ||
bda56f14 TG |
514 | /* Only reserve room for attribute header, packet data is added |
515 | * in skb_zerocopy() */ | |
516 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
517 | err = -ENOBUFS; | |
518 | goto out; | |
519 | } | |
f2a4d086 | 520 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 521 | |
f2a4d086 | 522 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
523 | if (err) |
524 | goto out; | |
ccb1352e | 525 | |
aea0bb4f | 526 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 527 | pad_packet(dp, user_skb); |
aea0bb4f | 528 | |
bda56f14 | 529 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 530 | |
bda56f14 | 531 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 532 | user_skb = NULL; |
ccb1352e | 533 | out: |
36d5fe6a ZK |
534 | if (err) |
535 | skb_tx_error(skb); | |
4ee45ea0 | 536 | kfree_skb(user_skb); |
ccb1352e JG |
537 | kfree_skb(nskb); |
538 | return err; | |
539 | } | |
540 | ||
ccb1352e JG |
541 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
542 | { | |
543 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 544 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
545 | struct nlattr **a = info->attrs; |
546 | struct sw_flow_actions *acts; | |
547 | struct sk_buff *packet; | |
548 | struct sw_flow *flow; | |
d98612b8 | 549 | struct sw_flow_actions *sf_acts; |
ccb1352e | 550 | struct datapath *dp; |
83c8df26 | 551 | struct vport *input_vport; |
7f8a436e | 552 | u16 mru = 0; |
bd1903b7 | 553 | u64 hash; |
ccb1352e JG |
554 | int len; |
555 | int err; | |
1ba39804 | 556 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
557 | |
558 | err = -EINVAL; | |
559 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 560 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
561 | goto err; |
562 | ||
563 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
564 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
565 | err = -ENOMEM; | |
566 | if (!packet) | |
567 | goto err; | |
568 | skb_reserve(packet, NET_IP_ALIGN); | |
569 | ||
32686a9d | 570 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 571 | |
7f8a436e JS |
572 | /* Set packet's mru */ |
573 | if (a[OVS_PACKET_ATTR_MRU]) { | |
574 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
575 | packet->ignore_df = 1; | |
576 | } | |
577 | OVS_CB(packet)->mru = mru; | |
578 | ||
bd1903b7 TZ |
579 | if (a[OVS_PACKET_ATTR_HASH]) { |
580 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
581 | ||
582 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
583 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
584 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
585 | } | |
586 | ||
ccb1352e | 587 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 588 | flow = ovs_flow_alloc(); |
ccb1352e JG |
589 | err = PTR_ERR(flow); |
590 | if (IS_ERR(flow)) | |
591 | goto err_kfree_skb; | |
592 | ||
c2ac6673 JS |
593 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
594 | packet, &flow->key, log); | |
ccb1352e JG |
595 | if (err) |
596 | goto err_flow_free; | |
597 | ||
7f8a436e | 598 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 599 | &flow->key, &acts, log); |
74f84a57 PS |
600 | if (err) |
601 | goto err_flow_free; | |
ccb1352e | 602 | |
f5796684 | 603 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 604 | packet->priority = flow->key.phy.priority; |
39c7caeb | 605 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
606 | |
607 | rcu_read_lock(); | |
7f8a436e | 608 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
609 | err = -ENODEV; |
610 | if (!dp) | |
611 | goto err_unlock; | |
612 | ||
83c8df26 PS |
613 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
614 | if (!input_vport) | |
615 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
616 | ||
617 | if (!input_vport) | |
618 | goto err_unlock; | |
619 | ||
7f8a436e | 620 | packet->dev = input_vport->dev; |
83c8df26 | 621 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 622 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 623 | |
ccb1352e | 624 | local_bh_disable(); |
d98612b8 | 625 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
626 | local_bh_enable(); |
627 | rcu_read_unlock(); | |
628 | ||
03f0d916 | 629 | ovs_flow_free(flow, false); |
ccb1352e JG |
630 | return err; |
631 | ||
632 | err_unlock: | |
633 | rcu_read_unlock(); | |
634 | err_flow_free: | |
03f0d916 | 635 | ovs_flow_free(flow, false); |
ccb1352e JG |
636 | err_kfree_skb: |
637 | kfree_skb(packet); | |
638 | err: | |
639 | return err; | |
640 | } | |
641 | ||
642 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 643 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
644 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
645 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 646 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 647 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
b5ab1f1b | 648 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, |
ccb1352e JG |
649 | }; |
650 | ||
4534de83 | 651 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 652 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 653 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 654 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
655 | .doit = ovs_packet_cmd_execute |
656 | } | |
657 | }; | |
658 | ||
56989f6d | 659 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
660 | .hdrsize = sizeof(struct ovs_header), |
661 | .name = OVS_PACKET_FAMILY, | |
662 | .version = OVS_PACKET_VERSION, | |
663 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 664 | .policy = packet_policy, |
0c200ef9 PS |
665 | .netnsok = true, |
666 | .parallel_ops = true, | |
667 | .ops = dp_packet_genl_ops, | |
668 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 669 | .module = THIS_MODULE, |
0c200ef9 PS |
670 | }; |
671 | ||
12eb18f7 | 672 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 673 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
674 | { |
675 | int i; | |
ccb1352e | 676 | |
1bd7116f AZ |
677 | memset(mega_stats, 0, sizeof(*mega_stats)); |
678 | ||
b637e498 | 679 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 680 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
681 | |
682 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 683 | |
ccb1352e JG |
684 | for_each_possible_cpu(i) { |
685 | const struct dp_stats_percpu *percpu_stats; | |
686 | struct dp_stats_percpu local_stats; | |
687 | unsigned int start; | |
688 | ||
689 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
690 | ||
691 | do { | |
57a7744e | 692 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 693 | local_stats = *percpu_stats; |
57a7744e | 694 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
695 | |
696 | stats->n_hit += local_stats.n_hit; | |
697 | stats->n_missed += local_stats.n_missed; | |
698 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 699 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
ccb1352e JG |
700 | } |
701 | } | |
702 | ||
74ed7ab9 JS |
703 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
704 | { | |
705 | return ovs_identifier_is_ufid(sfid) && | |
706 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
707 | } | |
708 | ||
709 | static bool should_fill_mask(uint32_t ufid_flags) | |
710 | { | |
711 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
712 | } | |
713 | ||
714 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 715 | { |
74ed7ab9 JS |
716 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
717 | } | |
718 | ||
719 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
720 | const struct sw_flow_id *sfid, | |
721 | uint32_t ufid_flags) | |
722 | { | |
723 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
724 | ||
4e81c0b3 PA |
725 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback |
726 | * see ovs_nla_put_identifier() | |
727 | */ | |
74ed7ab9 JS |
728 | if (sfid && ovs_identifier_is_ufid(sfid)) |
729 | len += nla_total_size(sfid->ufid_len); | |
4e81c0b3 PA |
730 | else |
731 | len += nla_total_size(ovs_key_attr_size()); | |
74ed7ab9 JS |
732 | |
733 | /* OVS_FLOW_ATTR_KEY */ | |
734 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
735 | len += nla_total_size(ovs_key_attr_size()); | |
736 | ||
737 | /* OVS_FLOW_ATTR_MASK */ | |
738 | if (should_fill_mask(ufid_flags)) | |
739 | len += nla_total_size(ovs_key_attr_size()); | |
740 | ||
741 | /* OVS_FLOW_ATTR_ACTIONS */ | |
742 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 743 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
744 | |
745 | return len | |
66c7a5ee | 746 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 747 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 748 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
749 | } |
750 | ||
ca7105f2 JS |
751 | /* Called with ovs_mutex or RCU read lock. */ |
752 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
753 | struct sk_buff *skb) | |
754 | { | |
755 | struct ovs_flow_stats stats; | |
756 | __be16 tcp_flags; | |
757 | unsigned long used; | |
ccb1352e | 758 | |
e298e505 | 759 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 760 | |
028d6a67 | 761 | if (used && |
0238b720 ND |
762 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
763 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 764 | return -EMSGSIZE; |
ccb1352e | 765 | |
028d6a67 | 766 | if (stats.n_packets && |
66c7a5ee ND |
767 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
768 | sizeof(struct ovs_flow_stats), &stats, | |
769 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 770 | return -EMSGSIZE; |
ccb1352e | 771 | |
e298e505 PS |
772 | if ((u8)ntohs(tcp_flags) && |
773 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
774 | return -EMSGSIZE; |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | /* Called with ovs_mutex or RCU read lock. */ | |
780 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
781 | struct sk_buff *skb, int skb_orig_len) | |
782 | { | |
783 | struct nlattr *start; | |
784 | int err; | |
ccb1352e JG |
785 | |
786 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
787 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
788 | * Netlink but individual action lists can be longer than | |
789 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
790 | * The userspace caller can always fetch the actions separately if it | |
791 | * really wants them. (Most userspace callers in fact don't care.) | |
792 | * | |
793 | * This can only fail for dump operations because the skb is always | |
794 | * properly sized for single flows. | |
795 | */ | |
ae0be8de | 796 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 797 | if (start) { |
d57170b1 PS |
798 | const struct sw_flow_actions *sf_acts; |
799 | ||
663efa36 | 800 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
801 | err = ovs_nla_put_actions(sf_acts->actions, |
802 | sf_acts->actions_len, skb); | |
0e9796b4 | 803 | |
74f84a57 PS |
804 | if (!err) |
805 | nla_nest_end(skb, start); | |
806 | else { | |
807 | if (skb_orig_len) | |
ca7105f2 | 808 | return err; |
74f84a57 PS |
809 | |
810 | nla_nest_cancel(skb, start); | |
811 | } | |
ca7105f2 JS |
812 | } else if (skb_orig_len) { |
813 | return -EMSGSIZE; | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | /* Called with ovs_mutex or RCU read lock. */ | |
820 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
821 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 822 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
823 | { |
824 | const int skb_orig_len = skb->len; | |
825 | struct ovs_header *ovs_header; | |
826 | int err; | |
827 | ||
828 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
829 | flags, cmd); | |
830 | if (!ovs_header) | |
831 | return -EMSGSIZE; | |
832 | ||
833 | ovs_header->dp_ifindex = dp_ifindex; | |
834 | ||
74ed7ab9 | 835 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
836 | if (err) |
837 | goto error; | |
838 | ||
74ed7ab9 JS |
839 | if (should_fill_key(&flow->id, ufid_flags)) { |
840 | err = ovs_nla_put_masked_key(flow, skb); | |
841 | if (err) | |
842 | goto error; | |
843 | } | |
844 | ||
845 | if (should_fill_mask(ufid_flags)) { | |
846 | err = ovs_nla_put_mask(flow, skb); | |
847 | if (err) | |
848 | goto error; | |
849 | } | |
ca7105f2 JS |
850 | |
851 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
852 | if (err) | |
853 | goto error; | |
854 | ||
74ed7ab9 JS |
855 | if (should_fill_actions(ufid_flags)) { |
856 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
857 | if (err) | |
858 | goto error; | |
859 | } | |
ccb1352e | 860 | |
053c095a JB |
861 | genlmsg_end(skb, ovs_header); |
862 | return 0; | |
ccb1352e | 863 | |
ccb1352e JG |
864 | error: |
865 | genlmsg_cancel(skb, ovs_header); | |
866 | return err; | |
867 | } | |
868 | ||
0e9796b4 JR |
869 | /* May not be called with RCU read lock. */ |
870 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 871 | const struct sw_flow_id *sfid, |
fb5d1e9e | 872 | struct genl_info *info, |
74ed7ab9 JS |
873 | bool always, |
874 | uint32_t ufid_flags) | |
ccb1352e | 875 | { |
fb5d1e9e | 876 | struct sk_buff *skb; |
74ed7ab9 | 877 | size_t len; |
ccb1352e | 878 | |
9b67aa4a | 879 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
880 | return NULL; |
881 | ||
74ed7ab9 | 882 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 883 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
884 | if (!skb) |
885 | return ERR_PTR(-ENOMEM); | |
886 | ||
887 | return skb; | |
ccb1352e JG |
888 | } |
889 | ||
0e9796b4 JR |
890 | /* Called with ovs_mutex. */ |
891 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
892 | int dp_ifindex, | |
893 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 894 | bool always, u32 ufid_flags) |
ccb1352e JG |
895 | { |
896 | struct sk_buff *skb; | |
897 | int retval; | |
898 | ||
74ed7ab9 JS |
899 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
900 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 901 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 902 | return skb; |
ccb1352e | 903 | |
0e9796b4 JR |
904 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
905 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 906 | cmd, ufid_flags); |
8ffeb03f PA |
907 | if (WARN_ON_ONCE(retval < 0)) { |
908 | kfree_skb(skb); | |
909 | skb = ERR_PTR(retval); | |
910 | } | |
ccb1352e JG |
911 | return skb; |
912 | } | |
913 | ||
37bdc87b | 914 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 915 | { |
7f8a436e | 916 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
917 | struct nlattr **a = info->attrs; |
918 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 919 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 920 | struct sw_flow_mask mask; |
ccb1352e JG |
921 | struct sk_buff *reply; |
922 | struct datapath *dp; | |
37bdc87b | 923 | struct sw_flow_actions *acts; |
03f0d916 | 924 | struct sw_flow_match match; |
74ed7ab9 | 925 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 926 | int error; |
05da5898 | 927 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 928 | |
893f139b | 929 | /* Must have key and actions. */ |
ccb1352e | 930 | error = -EINVAL; |
426cda5c | 931 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 932 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 933 | goto error; |
426cda5c JG |
934 | } |
935 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 936 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 937 | goto error; |
426cda5c | 938 | } |
03f0d916 | 939 | |
893f139b JR |
940 | /* Most of the time we need to allocate a new flow, do it before |
941 | * locking. | |
942 | */ | |
943 | new_flow = ovs_flow_alloc(); | |
944 | if (IS_ERR(new_flow)) { | |
945 | error = PTR_ERR(new_flow); | |
946 | goto error; | |
947 | } | |
948 | ||
949 | /* Extract key. */ | |
2279994d | 950 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 951 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 952 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 953 | if (error) |
893f139b | 954 | goto err_kfree_flow; |
ccb1352e | 955 | |
74ed7ab9 JS |
956 | /* Extract flow identifier. */ |
957 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 958 | &new_flow->key, log); |
74ed7ab9 JS |
959 | if (error) |
960 | goto err_kfree_flow; | |
74f84a57 | 961 | |
190aa3e7 | 962 | /* unmasked key is needed to match when ufid is not used. */ |
963 | if (ovs_identifier_is_key(&new_flow->id)) | |
964 | match.key = new_flow->id.unmasked_key; | |
965 | ||
966 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
967 | ||
893f139b | 968 | /* Validate actions. */ |
7f8a436e JS |
969 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
970 | &new_flow->key, &acts, log); | |
37bdc87b | 971 | if (error) { |
05da5898 | 972 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 973 | goto err_kfree_flow; |
893f139b JR |
974 | } |
975 | ||
74ed7ab9 JS |
976 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
977 | ufid_flags); | |
893f139b JR |
978 | if (IS_ERR(reply)) { |
979 | error = PTR_ERR(reply); | |
980 | goto err_kfree_acts; | |
ccb1352e JG |
981 | } |
982 | ||
8e4e1713 | 983 | ovs_lock(); |
7f8a436e | 984 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
985 | if (unlikely(!dp)) { |
986 | error = -ENODEV; | |
8e4e1713 | 987 | goto err_unlock_ovs; |
893f139b | 988 | } |
74ed7ab9 | 989 | |
03f0d916 | 990 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
991 | if (ovs_identifier_is_ufid(&new_flow->id)) |
992 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
993 | if (!flow) | |
190aa3e7 | 994 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
995 | if (likely(!flow)) { |
996 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
997 | |
998 | /* Put flow in bucket. */ | |
893f139b JR |
999 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1000 | if (unlikely(error)) { | |
618ed0c8 | 1001 | acts = NULL; |
893f139b JR |
1002 | goto err_unlock_ovs; |
1003 | } | |
1004 | ||
1005 | if (unlikely(reply)) { | |
1006 | error = ovs_flow_cmd_fill_info(new_flow, | |
1007 | ovs_header->dp_ifindex, | |
1008 | reply, info->snd_portid, | |
1009 | info->snd_seq, 0, | |
74ed7ab9 JS |
1010 | OVS_FLOW_CMD_NEW, |
1011 | ufid_flags); | |
893f139b | 1012 | BUG_ON(error < 0); |
618ed0c8 | 1013 | } |
893f139b | 1014 | ovs_unlock(); |
ccb1352e | 1015 | } else { |
37bdc87b JR |
1016 | struct sw_flow_actions *old_acts; |
1017 | ||
ccb1352e JG |
1018 | /* Bail out if we're not allowed to modify an existing flow. |
1019 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1020 | * because Generic Netlink treats the latter as a dump | |
1021 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1022 | * gets fixed. | |
1023 | */ | |
893f139b JR |
1024 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1025 | | NLM_F_EXCL))) { | |
1026 | error = -EEXIST; | |
8e4e1713 | 1027 | goto err_unlock_ovs; |
893f139b | 1028 | } |
74ed7ab9 JS |
1029 | /* The flow identifier has to be the same for flow updates. |
1030 | * Look for any overlapping flow. | |
1031 | */ | |
1032 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1033 | if (ovs_identifier_is_key(&flow->id)) | |
1034 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1035 | &match); | |
1036 | else /* UFID matches but key is different */ | |
1037 | flow = NULL; | |
4a46b24e AW |
1038 | if (!flow) { |
1039 | error = -ENOENT; | |
1040 | goto err_unlock_ovs; | |
1041 | } | |
893f139b | 1042 | } |
37bdc87b JR |
1043 | /* Update actions. */ |
1044 | old_acts = ovsl_dereference(flow->sf_acts); | |
1045 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1046 | |
893f139b JR |
1047 | if (unlikely(reply)) { |
1048 | error = ovs_flow_cmd_fill_info(flow, | |
1049 | ovs_header->dp_ifindex, | |
1050 | reply, info->snd_portid, | |
1051 | info->snd_seq, 0, | |
74ed7ab9 JS |
1052 | OVS_FLOW_CMD_NEW, |
1053 | ufid_flags); | |
893f139b JR |
1054 | BUG_ON(error < 0); |
1055 | } | |
1056 | ovs_unlock(); | |
37bdc87b | 1057 | |
34ae932a | 1058 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1059 | ovs_flow_free(new_flow, false); |
37bdc87b | 1060 | } |
893f139b JR |
1061 | |
1062 | if (reply) | |
1063 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1064 | return 0; |
1065 | ||
37bdc87b JR |
1066 | err_unlock_ovs: |
1067 | ovs_unlock(); | |
893f139b JR |
1068 | kfree_skb(reply); |
1069 | err_kfree_acts: | |
34ae932a | 1070 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1071 | err_kfree_flow: |
1072 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1073 | error: |
1074 | return error; | |
1075 | } | |
ccb1352e | 1076 | |
2fdb957d | 1077 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
26063790 | 1078 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
7f8a436e | 1079 | const struct nlattr *a, |
6b205b2c | 1080 | const struct sw_flow_key *key, |
05da5898 JR |
1081 | const struct sw_flow_mask *mask, |
1082 | bool log) | |
6b205b2c JG |
1083 | { |
1084 | struct sw_flow_actions *acts; | |
1085 | struct sw_flow_key masked_key; | |
1086 | int error; | |
1087 | ||
ae5f2fb1 | 1088 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1089 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1090 | if (error) { |
05da5898 JR |
1091 | OVS_NLERR(log, |
1092 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1093 | return ERR_PTR(error); |
1094 | } | |
1095 | ||
1096 | return acts; | |
1097 | } | |
1098 | ||
9cc9a5cb TZ |
1099 | /* Factor out match-init and action-copy to avoid |
1100 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1101 | * used to get actions, we new a function to save some | |
1102 | * stack space. | |
1103 | * | |
1104 | * If there are not key and action attrs, we return 0 | |
1105 | * directly. In the case, the caller will also not use the | |
1106 | * match as before. If there is action attr, we try to get | |
1107 | * actions and save them to *acts. Before returning from | |
1108 | * the function, we reset the match->mask pointer. Because | |
1109 | * we should not to return match object with dangling reference | |
1110 | * to mask. | |
1111 | * */ | |
26063790 AB |
1112 | static noinline_for_stack int |
1113 | ovs_nla_init_match_and_action(struct net *net, | |
1114 | struct sw_flow_match *match, | |
1115 | struct sw_flow_key *key, | |
1116 | struct nlattr **a, | |
1117 | struct sw_flow_actions **acts, | |
1118 | bool log) | |
9cc9a5cb TZ |
1119 | { |
1120 | struct sw_flow_mask mask; | |
1121 | int error = 0; | |
1122 | ||
1123 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1124 | ovs_match_init(match, key, true, &mask); | |
1125 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1126 | a[OVS_FLOW_ATTR_MASK], log); | |
1127 | if (error) | |
1128 | goto error; | |
1129 | } | |
1130 | ||
1131 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1132 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1133 | OVS_NLERR(log, | |
1134 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1135 | error = -EINVAL; |
1136 | goto error; | |
9cc9a5cb TZ |
1137 | } |
1138 | ||
1139 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1140 | &mask, log); | |
1141 | if (IS_ERR(*acts)) { | |
1142 | error = PTR_ERR(*acts); | |
1143 | goto error; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | /* On success, error is 0. */ | |
1148 | error: | |
1149 | match->mask = NULL; | |
1150 | return error; | |
1151 | } | |
1152 | ||
37bdc87b JR |
1153 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1154 | { | |
7f8a436e | 1155 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1156 | struct nlattr **a = info->attrs; |
1157 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1158 | struct sw_flow_key key; |
37bdc87b | 1159 | struct sw_flow *flow; |
37bdc87b JR |
1160 | struct sk_buff *reply = NULL; |
1161 | struct datapath *dp; | |
893f139b | 1162 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1163 | struct sw_flow_match match; |
74ed7ab9 JS |
1164 | struct sw_flow_id sfid; |
1165 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1166 | int error = 0; |
05da5898 | 1167 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1168 | bool ufid_present; |
37bdc87b | 1169 | |
74ed7ab9 | 1170 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1171 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1172 | OVS_NLERR(log, |
1173 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1174 | return -EINVAL; |
6f15cdbf | 1175 | } |
9cc9a5cb TZ |
1176 | |
1177 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1178 | &acts, log); | |
37bdc87b JR |
1179 | if (error) |
1180 | goto error; | |
1181 | ||
9cc9a5cb | 1182 | if (acts) { |
2fdb957d | 1183 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1184 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1185 | ufid_flags); | |
893f139b JR |
1186 | if (IS_ERR(reply)) { |
1187 | error = PTR_ERR(reply); | |
1188 | goto err_kfree_acts; | |
be52c9e9 | 1189 | } |
37bdc87b | 1190 | } |
0e9796b4 | 1191 | |
37bdc87b | 1192 | ovs_lock(); |
7f8a436e | 1193 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1194 | if (unlikely(!dp)) { |
1195 | error = -ENODEV; | |
37bdc87b | 1196 | goto err_unlock_ovs; |
893f139b | 1197 | } |
37bdc87b | 1198 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1199 | if (ufid_present) |
1200 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1201 | else | |
1202 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1203 | if (unlikely(!flow)) { |
1204 | error = -ENOENT; | |
37bdc87b | 1205 | goto err_unlock_ovs; |
893f139b | 1206 | } |
4a46b24e | 1207 | |
37bdc87b | 1208 | /* Update actions, if present. */ |
893f139b | 1209 | if (likely(acts)) { |
37bdc87b JR |
1210 | old_acts = ovsl_dereference(flow->sf_acts); |
1211 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1212 | |
1213 | if (unlikely(reply)) { | |
1214 | error = ovs_flow_cmd_fill_info(flow, | |
1215 | ovs_header->dp_ifindex, | |
1216 | reply, info->snd_portid, | |
1217 | info->snd_seq, 0, | |
804fe108 | 1218 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1219 | ufid_flags); |
893f139b JR |
1220 | BUG_ON(error < 0); |
1221 | } | |
1222 | } else { | |
1223 | /* Could not alloc without acts before locking. */ | |
1224 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1225 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1226 | ufid_flags); |
1227 | ||
b5ffe634 | 1228 | if (IS_ERR(reply)) { |
893f139b JR |
1229 | error = PTR_ERR(reply); |
1230 | goto err_unlock_ovs; | |
1231 | } | |
ccb1352e | 1232 | } |
37bdc87b | 1233 | |
37bdc87b JR |
1234 | /* Clear stats. */ |
1235 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1236 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1237 | ovs_unlock(); |
ccb1352e | 1238 | |
893f139b JR |
1239 | if (reply) |
1240 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1241 | if (old_acts) | |
34ae932a | 1242 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1243 | |
ccb1352e JG |
1244 | return 0; |
1245 | ||
8e4e1713 PS |
1246 | err_unlock_ovs: |
1247 | ovs_unlock(); | |
893f139b JR |
1248 | kfree_skb(reply); |
1249 | err_kfree_acts: | |
34ae932a | 1250 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1251 | error: |
1252 | return error; | |
1253 | } | |
1254 | ||
1255 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1256 | { | |
1257 | struct nlattr **a = info->attrs; | |
1258 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1259 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1260 | struct sw_flow_key key; |
1261 | struct sk_buff *reply; | |
1262 | struct sw_flow *flow; | |
1263 | struct datapath *dp; | |
03f0d916 | 1264 | struct sw_flow_match match; |
74ed7ab9 JS |
1265 | struct sw_flow_id ufid; |
1266 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1267 | int err = 0; | |
05da5898 | 1268 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1269 | bool ufid_present; |
ccb1352e | 1270 | |
74ed7ab9 JS |
1271 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1272 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1273 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1274 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1275 | log); |
1276 | } else if (!ufid_present) { | |
05da5898 JR |
1277 | OVS_NLERR(log, |
1278 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1279 | err = -EINVAL; |
03f0d916 | 1280 | } |
ccb1352e JG |
1281 | if (err) |
1282 | return err; | |
1283 | ||
8e4e1713 | 1284 | ovs_lock(); |
46df7b81 | 1285 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1286 | if (!dp) { |
1287 | err = -ENODEV; | |
1288 | goto unlock; | |
1289 | } | |
ccb1352e | 1290 | |
74ed7ab9 JS |
1291 | if (ufid_present) |
1292 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1293 | else | |
1294 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1295 | if (!flow) { |
8e4e1713 PS |
1296 | err = -ENOENT; |
1297 | goto unlock; | |
1298 | } | |
ccb1352e | 1299 | |
0e9796b4 | 1300 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1301 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1302 | if (IS_ERR(reply)) { |
1303 | err = PTR_ERR(reply); | |
1304 | goto unlock; | |
1305 | } | |
ccb1352e | 1306 | |
8e4e1713 | 1307 | ovs_unlock(); |
ccb1352e | 1308 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1309 | unlock: |
1310 | ovs_unlock(); | |
1311 | return err; | |
ccb1352e JG |
1312 | } |
1313 | ||
1314 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1315 | { | |
1316 | struct nlattr **a = info->attrs; | |
1317 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1318 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1319 | struct sw_flow_key key; |
1320 | struct sk_buff *reply; | |
74ed7ab9 | 1321 | struct sw_flow *flow = NULL; |
ccb1352e | 1322 | struct datapath *dp; |
03f0d916 | 1323 | struct sw_flow_match match; |
74ed7ab9 JS |
1324 | struct sw_flow_id ufid; |
1325 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1326 | int err; |
05da5898 | 1327 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1328 | bool ufid_present; |
ccb1352e | 1329 | |
74ed7ab9 JS |
1330 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1331 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1332 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1333 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1334 | NULL, log); | |
aed06778 JR |
1335 | if (unlikely(err)) |
1336 | return err; | |
1337 | } | |
1338 | ||
8e4e1713 | 1339 | ovs_lock(); |
46df7b81 | 1340 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1341 | if (unlikely(!dp)) { |
8e4e1713 PS |
1342 | err = -ENODEV; |
1343 | goto unlock; | |
1344 | } | |
46df7b81 | 1345 | |
74ed7ab9 | 1346 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1347 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1348 | goto unlock; |
1349 | } | |
03f0d916 | 1350 | |
74ed7ab9 JS |
1351 | if (ufid_present) |
1352 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1353 | else | |
1354 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1355 | if (unlikely(!flow)) { |
8e4e1713 PS |
1356 | err = -ENOENT; |
1357 | goto unlock; | |
1358 | } | |
ccb1352e | 1359 | |
b637e498 | 1360 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1361 | ovs_unlock(); |
ccb1352e | 1362 | |
aed06778 | 1363 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1364 | &flow->id, info, false, ufid_flags); |
aed06778 | 1365 | if (likely(reply)) { |
b90f5aa4 | 1366 | if (!IS_ERR(reply)) { |
aed06778 JR |
1367 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1368 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1369 | reply, info->snd_portid, | |
1370 | info->snd_seq, 0, | |
74ed7ab9 JS |
1371 | OVS_FLOW_CMD_DEL, |
1372 | ufid_flags); | |
aed06778 | 1373 | rcu_read_unlock(); |
8a574f86 PA |
1374 | if (WARN_ON_ONCE(err < 0)) { |
1375 | kfree_skb(reply); | |
1376 | goto out_free; | |
1377 | } | |
aed06778 JR |
1378 | |
1379 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1380 | } else { | |
1381 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1382 | } | |
fb5d1e9e | 1383 | } |
ccb1352e | 1384 | |
8a574f86 | 1385 | out_free: |
aed06778 | 1386 | ovs_flow_free(flow, true); |
ccb1352e | 1387 | return 0; |
8e4e1713 PS |
1388 | unlock: |
1389 | ovs_unlock(); | |
1390 | return err; | |
ccb1352e JG |
1391 | } |
1392 | ||
1393 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1394 | { | |
74ed7ab9 | 1395 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1396 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1397 | struct table_instance *ti; |
ccb1352e | 1398 | struct datapath *dp; |
74ed7ab9 JS |
1399 | u32 ufid_flags; |
1400 | int err; | |
1401 | ||
8cb08174 JB |
1402 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1403 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1404 | if (err) |
1405 | return err; | |
1406 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1407 | |
d57170b1 | 1408 | rcu_read_lock(); |
cc3a5ae6 | 1409 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1410 | if (!dp) { |
d57170b1 | 1411 | rcu_read_unlock(); |
ccb1352e | 1412 | return -ENODEV; |
8e4e1713 | 1413 | } |
ccb1352e | 1414 | |
b637e498 | 1415 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1416 | for (;;) { |
1417 | struct sw_flow *flow; | |
1418 | u32 bucket, obj; | |
1419 | ||
1420 | bucket = cb->args[0]; | |
1421 | obj = cb->args[1]; | |
b637e498 | 1422 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1423 | if (!flow) |
1424 | break; | |
1425 | ||
0e9796b4 | 1426 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1427 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1428 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1429 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1430 | break; |
1431 | ||
1432 | cb->args[0] = bucket; | |
1433 | cb->args[1] = obj; | |
1434 | } | |
d57170b1 | 1435 | rcu_read_unlock(); |
ccb1352e JG |
1436 | return skb->len; |
1437 | } | |
1438 | ||
0c200ef9 PS |
1439 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1440 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1441 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1442 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1443 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1444 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1445 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1446 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1447 | }; |
1448 | ||
48e48a70 | 1449 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1450 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1451 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1452 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1453 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1454 | }, |
1455 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1456 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1457 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1458 | .doit = ovs_flow_cmd_del |
1459 | }, | |
1460 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1461 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1462 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1463 | .doit = ovs_flow_cmd_get, |
1464 | .dumpit = ovs_flow_cmd_dump | |
1465 | }, | |
1466 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1467 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1468 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1469 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1470 | }, |
1471 | }; | |
1472 | ||
56989f6d | 1473 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1474 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1475 | .name = OVS_FLOW_FAMILY, |
1476 | .version = OVS_FLOW_VERSION, | |
1477 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1478 | .policy = flow_policy, |
3a4e0d6a PS |
1479 | .netnsok = true, |
1480 | .parallel_ops = true, | |
0c200ef9 PS |
1481 | .ops = dp_flow_genl_ops, |
1482 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1483 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1484 | .n_mcgrps = 1, | |
489111e5 | 1485 | .module = THIS_MODULE, |
ccb1352e JG |
1486 | }; |
1487 | ||
c3ff8cfe TG |
1488 | static size_t ovs_dp_cmd_msg_size(void) |
1489 | { | |
1490 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1491 | ||
1492 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1493 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1494 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1495 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
c3ff8cfe TG |
1496 | |
1497 | return msgsize; | |
1498 | } | |
1499 | ||
8ec609d8 | 1500 | /* Called with ovs_mutex. */ |
ccb1352e | 1501 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1502 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1503 | { |
1504 | struct ovs_header *ovs_header; | |
1505 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1506 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1507 | int err; |
1508 | ||
15e47304 | 1509 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1510 | flags, cmd); |
1511 | if (!ovs_header) | |
1512 | goto error; | |
1513 | ||
1514 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1515 | ||
ccb1352e | 1516 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1517 | if (err) |
1518 | goto nla_put_failure; | |
1519 | ||
1bd7116f | 1520 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1521 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1522 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1523 | goto nla_put_failure; |
1524 | ||
66c7a5ee ND |
1525 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1526 | sizeof(struct ovs_dp_megaflow_stats), | |
1527 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1528 | goto nla_put_failure; |
ccb1352e | 1529 | |
43d4be9c TG |
1530 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1531 | goto nla_put_failure; | |
1532 | ||
053c095a JB |
1533 | genlmsg_end(skb, ovs_header); |
1534 | return 0; | |
ccb1352e JG |
1535 | |
1536 | nla_put_failure: | |
1537 | genlmsg_cancel(skb, ovs_header); | |
1538 | error: | |
1539 | return -EMSGSIZE; | |
1540 | } | |
1541 | ||
263ea090 | 1542 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1543 | { |
551ddc05 | 1544 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1545 | } |
1546 | ||
bb6f9a70 | 1547 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1548 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1549 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1550 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1551 | { | |
1552 | struct datapath *dp; | |
1553 | ||
1554 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1555 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1556 | else { |
1557 | struct vport *vport; | |
1558 | ||
46df7b81 | 1559 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1560 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1561 | } |
1562 | return dp ? dp : ERR_PTR(-ENODEV); | |
1563 | } | |
1564 | ||
44da5ae5 TG |
1565 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1566 | { | |
1567 | struct datapath *dp; | |
1568 | ||
1569 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1570 | if (IS_ERR(dp)) |
44da5ae5 TG |
1571 | return; |
1572 | ||
1573 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1574 | dp->user_features = 0; | |
1575 | } | |
1576 | ||
95a7233c PB |
1577 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1578 | ||
1579 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
43d4be9c | 1580 | { |
95a7233c PB |
1581 | u32 user_features = 0; |
1582 | ||
1583 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1584 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1585 | ||
1586 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1587 | OVS_DP_F_UNALIGNED | | |
1588 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1589 | return -EOPNOTSUPP; | |
1590 | ||
1591 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1592 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1593 | return -EOPNOTSUPP; | |
1594 | #endif | |
1595 | } | |
1596 | ||
1597 | dp->user_features = user_features; | |
1598 | ||
1599 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1600 | static_branch_enable(&tc_recirc_sharing_support); | |
1601 | else | |
1602 | static_branch_disable(&tc_recirc_sharing_support); | |
1603 | ||
1604 | return 0; | |
43d4be9c TG |
1605 | } |
1606 | ||
eec62ead TZ |
1607 | static int ovs_dp_stats_init(struct datapath *dp) |
1608 | { | |
1609 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1610 | if (!dp->stats_percpu) | |
1611 | return -ENOMEM; | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static int ovs_dp_vport_init(struct datapath *dp) | |
1617 | { | |
1618 | int i; | |
1619 | ||
1620 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1621 | sizeof(struct hlist_head), | |
1622 | GFP_KERNEL); | |
1623 | if (!dp->ports) | |
1624 | return -ENOMEM; | |
1625 | ||
1626 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1627 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | ||
ccb1352e JG |
1632 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1633 | { | |
1634 | struct nlattr **a = info->attrs; | |
1635 | struct vport_parms parms; | |
1636 | struct sk_buff *reply; | |
1637 | struct datapath *dp; | |
1638 | struct vport *vport; | |
46df7b81 | 1639 | struct ovs_net *ovs_net; |
eec62ead | 1640 | int err; |
ccb1352e JG |
1641 | |
1642 | err = -EINVAL; | |
1643 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1644 | goto err; | |
1645 | ||
263ea090 | 1646 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1647 | if (!reply) |
1648 | return -ENOMEM; | |
ccb1352e JG |
1649 | |
1650 | err = -ENOMEM; | |
1651 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1652 | if (dp == NULL) | |
eec62ead | 1653 | goto err_destroy_reply; |
46df7b81 | 1654 | |
efd7ef1c | 1655 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1656 | |
1657 | /* Allocate table. */ | |
b637e498 PS |
1658 | err = ovs_flow_tbl_init(&dp->table); |
1659 | if (err) | |
eec62ead | 1660 | goto err_destroy_dp; |
ccb1352e | 1661 | |
eec62ead TZ |
1662 | err = ovs_dp_stats_init(dp); |
1663 | if (err) | |
ccb1352e | 1664 | goto err_destroy_table; |
ccb1352e | 1665 | |
eec62ead TZ |
1666 | err = ovs_dp_vport_init(dp); |
1667 | if (err) | |
1668 | goto err_destroy_stats; | |
15eac2a7 | 1669 | |
96fbc13d AZ |
1670 | err = ovs_meters_init(dp); |
1671 | if (err) | |
eec62ead | 1672 | goto err_destroy_ports; |
96fbc13d | 1673 | |
ccb1352e JG |
1674 | /* Set up our datapath device. */ |
1675 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1676 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1677 | parms.options = NULL; | |
1678 | parms.dp = dp; | |
1679 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1680 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1681 | |
95a7233c PB |
1682 | err = ovs_dp_change(dp, a); |
1683 | if (err) | |
1684 | goto err_destroy_meters; | |
43d4be9c | 1685 | |
6093ae9a JR |
1686 | /* So far only local changes have been made, now need the lock. */ |
1687 | ovs_lock(); | |
1688 | ||
ccb1352e JG |
1689 | vport = new_vport(&parms); |
1690 | if (IS_ERR(vport)) { | |
1691 | err = PTR_ERR(vport); | |
1692 | if (err == -EBUSY) | |
1693 | err = -EEXIST; | |
1694 | ||
44da5ae5 TG |
1695 | if (err == -EEXIST) { |
1696 | /* An outdated user space instance that does not understand | |
1697 | * the concept of user_features has attempted to create a new | |
1698 | * datapath and is likely to reuse it. Drop all user features. | |
1699 | */ | |
1700 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1701 | ovs_dp_reset_user_features(skb, info); | |
1702 | } | |
1703 | ||
4c76bf69 | 1704 | ovs_unlock(); |
96fbc13d | 1705 | goto err_destroy_meters; |
ccb1352e JG |
1706 | } |
1707 | ||
6093ae9a JR |
1708 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1709 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1710 | BUG_ON(err < 0); | |
ccb1352e | 1711 | |
46df7b81 | 1712 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1713 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1714 | |
1715 | ovs_unlock(); | |
ccb1352e | 1716 | |
2a94fe48 | 1717 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1718 | return 0; |
1719 | ||
96fbc13d | 1720 | err_destroy_meters: |
96fbc13d | 1721 | ovs_meters_exit(dp); |
eec62ead | 1722 | err_destroy_ports: |
15eac2a7 | 1723 | kfree(dp->ports); |
eec62ead | 1724 | err_destroy_stats: |
ccb1352e JG |
1725 | free_percpu(dp->stats_percpu); |
1726 | err_destroy_table: | |
9b996e54 | 1727 | ovs_flow_tbl_destroy(&dp->table); |
eec62ead | 1728 | err_destroy_dp: |
ccb1352e | 1729 | kfree(dp); |
eec62ead | 1730 | err_destroy_reply: |
6093ae9a | 1731 | kfree_skb(reply); |
ccb1352e JG |
1732 | err: |
1733 | return err; | |
1734 | } | |
1735 | ||
8e4e1713 | 1736 | /* Called with ovs_mutex. */ |
46df7b81 | 1737 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1738 | { |
15eac2a7 | 1739 | int i; |
ccb1352e | 1740 | |
15eac2a7 PS |
1741 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1742 | struct vport *vport; | |
b67bfe0d | 1743 | struct hlist_node *n; |
15eac2a7 | 1744 | |
b67bfe0d | 1745 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1746 | if (vport->port_no != OVSP_LOCAL) |
1747 | ovs_dp_detach_port(vport); | |
1748 | } | |
ccb1352e | 1749 | |
59a35d60 | 1750 | list_del_rcu(&dp->list_node); |
ccb1352e | 1751 | |
8e4e1713 | 1752 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1753 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1754 | */ |
8e4e1713 | 1755 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1756 | |
e80857cc | 1757 | /* RCU destroy the flow table */ |
ccb1352e | 1758 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1759 | } |
1760 | ||
1761 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1762 | { | |
1763 | struct sk_buff *reply; | |
1764 | struct datapath *dp; | |
1765 | int err; | |
1766 | ||
263ea090 | 1767 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1768 | if (!reply) |
1769 | return -ENOMEM; | |
1770 | ||
8e4e1713 | 1771 | ovs_lock(); |
46df7b81 PS |
1772 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1773 | err = PTR_ERR(dp); | |
1774 | if (IS_ERR(dp)) | |
6093ae9a | 1775 | goto err_unlock_free; |
46df7b81 | 1776 | |
6093ae9a JR |
1777 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1778 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1779 | BUG_ON(err < 0); | |
46df7b81 PS |
1780 | |
1781 | __dp_destroy(dp); | |
8e4e1713 | 1782 | ovs_unlock(); |
ccb1352e | 1783 | |
2a94fe48 | 1784 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1785 | |
1786 | return 0; | |
6093ae9a JR |
1787 | |
1788 | err_unlock_free: | |
8e4e1713 | 1789 | ovs_unlock(); |
6093ae9a | 1790 | kfree_skb(reply); |
8e4e1713 | 1791 | return err; |
ccb1352e JG |
1792 | } |
1793 | ||
1794 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1795 | { | |
1796 | struct sk_buff *reply; | |
1797 | struct datapath *dp; | |
1798 | int err; | |
1799 | ||
263ea090 | 1800 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1801 | if (!reply) |
1802 | return -ENOMEM; | |
1803 | ||
8e4e1713 | 1804 | ovs_lock(); |
46df7b81 | 1805 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1806 | err = PTR_ERR(dp); |
ccb1352e | 1807 | if (IS_ERR(dp)) |
6093ae9a | 1808 | goto err_unlock_free; |
ccb1352e | 1809 | |
95a7233c PB |
1810 | err = ovs_dp_change(dp, info->attrs); |
1811 | if (err) | |
1812 | goto err_unlock_free; | |
43d4be9c | 1813 | |
6093ae9a | 1814 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1815 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1816 | BUG_ON(err < 0); |
ccb1352e | 1817 | |
8e4e1713 | 1818 | ovs_unlock(); |
2a94fe48 | 1819 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1820 | |
1821 | return 0; | |
6093ae9a JR |
1822 | |
1823 | err_unlock_free: | |
8e4e1713 | 1824 | ovs_unlock(); |
6093ae9a | 1825 | kfree_skb(reply); |
8e4e1713 | 1826 | return err; |
ccb1352e JG |
1827 | } |
1828 | ||
1829 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1830 | { | |
1831 | struct sk_buff *reply; | |
1832 | struct datapath *dp; | |
8e4e1713 | 1833 | int err; |
ccb1352e | 1834 | |
263ea090 | 1835 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1836 | if (!reply) |
1837 | return -ENOMEM; | |
1838 | ||
8ec609d8 | 1839 | ovs_lock(); |
46df7b81 | 1840 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1841 | if (IS_ERR(dp)) { |
1842 | err = PTR_ERR(dp); | |
6093ae9a | 1843 | goto err_unlock_free; |
8e4e1713 | 1844 | } |
6093ae9a | 1845 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1846 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1847 | BUG_ON(err < 0); |
8ec609d8 | 1848 | ovs_unlock(); |
ccb1352e JG |
1849 | |
1850 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1851 | |
6093ae9a | 1852 | err_unlock_free: |
8ec609d8 | 1853 | ovs_unlock(); |
6093ae9a | 1854 | kfree_skb(reply); |
8e4e1713 | 1855 | return err; |
ccb1352e JG |
1856 | } |
1857 | ||
1858 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1859 | { | |
46df7b81 | 1860 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1861 | struct datapath *dp; |
1862 | int skip = cb->args[0]; | |
1863 | int i = 0; | |
1864 | ||
8ec609d8 PS |
1865 | ovs_lock(); |
1866 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1867 | if (i >= skip && |
15e47304 | 1868 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1869 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1870 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1871 | break; |
1872 | i++; | |
1873 | } | |
8ec609d8 | 1874 | ovs_unlock(); |
ccb1352e JG |
1875 | |
1876 | cb->args[0] = i; | |
1877 | ||
1878 | return skb->len; | |
1879 | } | |
1880 | ||
0c200ef9 PS |
1881 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1882 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1883 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1884 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1885 | }; | |
1886 | ||
48e48a70 | 1887 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1888 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1889 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1890 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1891 | .doit = ovs_dp_cmd_new |
1892 | }, | |
1893 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 1894 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1895 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1896 | .doit = ovs_dp_cmd_del |
1897 | }, | |
1898 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 1899 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1900 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1901 | .doit = ovs_dp_cmd_get, |
1902 | .dumpit = ovs_dp_cmd_dump | |
1903 | }, | |
1904 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 1905 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1906 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1907 | .doit = ovs_dp_cmd_set, |
1908 | }, | |
1909 | }; | |
1910 | ||
56989f6d | 1911 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1912 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1913 | .name = OVS_DATAPATH_FAMILY, |
1914 | .version = OVS_DATAPATH_VERSION, | |
1915 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 1916 | .policy = datapath_policy, |
3a4e0d6a PS |
1917 | .netnsok = true, |
1918 | .parallel_ops = true, | |
0c200ef9 PS |
1919 | .ops = dp_datapath_genl_ops, |
1920 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1921 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1922 | .n_mcgrps = 1, | |
489111e5 | 1923 | .module = THIS_MODULE, |
ccb1352e JG |
1924 | }; |
1925 | ||
8e4e1713 | 1926 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1927 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 | 1928 | struct net *net, u32 portid, u32 seq, |
d4e4fdf9 | 1929 | u32 flags, u8 cmd, gfp_t gfp) |
ccb1352e JG |
1930 | { |
1931 | struct ovs_header *ovs_header; | |
1932 | struct ovs_vport_stats vport_stats; | |
1933 | int err; | |
1934 | ||
15e47304 | 1935 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1936 | flags, cmd); |
1937 | if (!ovs_header) | |
1938 | return -EMSGSIZE; | |
1939 | ||
1940 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1941 | ||
028d6a67 DM |
1942 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1943 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1944 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1945 | ovs_vport_name(vport)) || |
1946 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1947 | goto nla_put_failure; |
ccb1352e | 1948 | |
9354d452 | 1949 | if (!net_eq(net, dev_net(vport->dev))) { |
d4e4fdf9 | 1950 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
9354d452 JB |
1951 | |
1952 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1953 | goto nla_put_failure; | |
1954 | } | |
1955 | ||
ccb1352e | 1956 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1957 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1958 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1959 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1960 | goto nla_put_failure; |
ccb1352e | 1961 | |
5cd667b0 AW |
1962 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1963 | goto nla_put_failure; | |
1964 | ||
ccb1352e JG |
1965 | err = ovs_vport_get_options(vport, skb); |
1966 | if (err == -EMSGSIZE) | |
1967 | goto error; | |
1968 | ||
053c095a JB |
1969 | genlmsg_end(skb, ovs_header); |
1970 | return 0; | |
ccb1352e JG |
1971 | |
1972 | nla_put_failure: | |
1973 | err = -EMSGSIZE; | |
1974 | error: | |
1975 | genlmsg_cancel(skb, ovs_header); | |
1976 | return err; | |
1977 | } | |
1978 | ||
6093ae9a JR |
1979 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1980 | { | |
1981 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1982 | } | |
1983 | ||
1984 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
1985 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1986 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
1987 | { |
1988 | struct sk_buff *skb; | |
1989 | int retval; | |
1990 | ||
d4e4fdf9 | 1991 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
ccb1352e JG |
1992 | if (!skb) |
1993 | return ERR_PTR(-ENOMEM); | |
1994 | ||
d4e4fdf9 GN |
1995 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
1996 | GFP_KERNEL); | |
a9341512 JG |
1997 | BUG_ON(retval < 0); |
1998 | ||
ccb1352e JG |
1999 | return skb; |
2000 | } | |
2001 | ||
8e4e1713 | 2002 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 2003 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 2004 | const struct ovs_header *ovs_header, |
ccb1352e JG |
2005 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
2006 | { | |
2007 | struct datapath *dp; | |
2008 | struct vport *vport; | |
2009 | ||
9354d452 JB |
2010 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2011 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 2012 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 2013 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
2014 | if (!vport) |
2015 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
2016 | if (ovs_header->dp_ifindex && |
2017 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2018 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
2019 | return vport; |
2020 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
2021 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
2022 | ||
2023 | if (port_no >= DP_MAX_PORTS) | |
2024 | return ERR_PTR(-EFBIG); | |
2025 | ||
46df7b81 | 2026 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
2027 | if (!dp) |
2028 | return ERR_PTR(-ENODEV); | |
2029 | ||
8e4e1713 | 2030 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 2031 | if (!vport) |
14408dba | 2032 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
2033 | return vport; |
2034 | } else | |
2035 | return ERR_PTR(-EINVAL); | |
9354d452 | 2036 | |
ccb1352e JG |
2037 | } |
2038 | ||
6b660c41 | 2039 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 2040 | { |
6b660c41 | 2041 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
2042 | struct net_device *dev; |
2043 | struct vport *vport; | |
2044 | int i; | |
2045 | ||
2046 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
53742e69 MB |
2047 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
2048 | lockdep_ovsl_is_held()) { | |
3a927bc7 PA |
2049 | dev = vport->dev; |
2050 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2051 | if (dev_headroom > max_headroom) | |
2052 | max_headroom = dev_headroom; | |
2053 | } | |
2054 | } | |
2055 | ||
6b660c41 TY |
2056 | return max_headroom; |
2057 | } | |
2058 | ||
2059 | /* Called with ovs_mutex */ | |
2060 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2061 | { | |
2062 | struct vport *vport; | |
2063 | int i; | |
2064 | ||
2065 | dp->max_headroom = new_headroom; | |
3a927bc7 | 2066 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) |
53742e69 MB |
2067 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
2068 | lockdep_ovsl_is_held()) | |
6b660c41 | 2069 | netdev_set_rx_headroom(vport->dev, new_headroom); |
3a927bc7 PA |
2070 | } |
2071 | ||
ccb1352e JG |
2072 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2073 | { | |
2074 | struct nlattr **a = info->attrs; | |
2075 | struct ovs_header *ovs_header = info->userhdr; | |
2076 | struct vport_parms parms; | |
2077 | struct sk_buff *reply; | |
2078 | struct vport *vport; | |
2079 | struct datapath *dp; | |
6b660c41 | 2080 | unsigned int new_headroom; |
ccb1352e JG |
2081 | u32 port_no; |
2082 | int err; | |
2083 | ||
ccb1352e JG |
2084 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2085 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2086 | return -EINVAL; |
9354d452 JB |
2087 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2088 | return -EOPNOTSUPP; | |
6093ae9a JR |
2089 | |
2090 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2091 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2092 | if (port_no >= DP_MAX_PORTS) | |
2093 | return -EFBIG; | |
2094 | ||
2095 | reply = ovs_vport_cmd_alloc_info(); | |
2096 | if (!reply) | |
2097 | return -ENOMEM; | |
ccb1352e | 2098 | |
8e4e1713 | 2099 | ovs_lock(); |
62b9c8d0 | 2100 | restart: |
46df7b81 | 2101 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2102 | err = -ENODEV; |
2103 | if (!dp) | |
6093ae9a | 2104 | goto exit_unlock_free; |
ccb1352e | 2105 | |
6093ae9a | 2106 | if (port_no) { |
8e4e1713 | 2107 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2108 | err = -EBUSY; |
2109 | if (vport) | |
6093ae9a | 2110 | goto exit_unlock_free; |
ccb1352e JG |
2111 | } else { |
2112 | for (port_no = 1; ; port_no++) { | |
2113 | if (port_no >= DP_MAX_PORTS) { | |
2114 | err = -EFBIG; | |
6093ae9a | 2115 | goto exit_unlock_free; |
ccb1352e | 2116 | } |
8e4e1713 | 2117 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2118 | if (!vport) |
2119 | break; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2124 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2125 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2126 | parms.dp = dp; | |
2127 | parms.port_no = port_no; | |
5cd667b0 | 2128 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2129 | |
2130 | vport = new_vport(&parms); | |
2131 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2132 | if (IS_ERR(vport)) { |
2133 | if (err == -EAGAIN) | |
2134 | goto restart; | |
6093ae9a | 2135 | goto exit_unlock_free; |
62b9c8d0 | 2136 | } |
ccb1352e | 2137 | |
9354d452 JB |
2138 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2139 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2140 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
3a927bc7 | 2141 | |
6b660c41 TY |
2142 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2143 | ||
2144 | if (new_headroom > dp->max_headroom) | |
2145 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2146 | else |
2147 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2148 | ||
6093ae9a JR |
2149 | BUG_ON(err < 0); |
2150 | ovs_unlock(); | |
ed661185 | 2151 | |
2a94fe48 | 2152 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2153 | return 0; |
ccb1352e | 2154 | |
6093ae9a | 2155 | exit_unlock_free: |
8e4e1713 | 2156 | ovs_unlock(); |
6093ae9a | 2157 | kfree_skb(reply); |
ccb1352e JG |
2158 | return err; |
2159 | } | |
2160 | ||
2161 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2162 | { | |
2163 | struct nlattr **a = info->attrs; | |
2164 | struct sk_buff *reply; | |
2165 | struct vport *vport; | |
2166 | int err; | |
2167 | ||
6093ae9a JR |
2168 | reply = ovs_vport_cmd_alloc_info(); |
2169 | if (!reply) | |
2170 | return -ENOMEM; | |
2171 | ||
8e4e1713 | 2172 | ovs_lock(); |
46df7b81 | 2173 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2174 | err = PTR_ERR(vport); |
2175 | if (IS_ERR(vport)) | |
6093ae9a | 2176 | goto exit_unlock_free; |
ccb1352e | 2177 | |
ccb1352e | 2178 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2179 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2180 | err = -EINVAL; |
6093ae9a | 2181 | goto exit_unlock_free; |
a9341512 JG |
2182 | } |
2183 | ||
f44f3408 | 2184 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2185 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2186 | if (err) |
6093ae9a | 2187 | goto exit_unlock_free; |
f44f3408 | 2188 | } |
a9341512 | 2189 | |
5cd667b0 AW |
2190 | |
2191 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2192 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2193 | ||
2194 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2195 | if (err) | |
2196 | goto exit_unlock_free; | |
2197 | } | |
ccb1352e | 2198 | |
9354d452 JB |
2199 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2200 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2201 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
a9341512 | 2202 | BUG_ON(err < 0); |
ccb1352e | 2203 | |
8e4e1713 | 2204 | ovs_unlock(); |
2a94fe48 | 2205 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2206 | return 0; |
ccb1352e | 2207 | |
6093ae9a | 2208 | exit_unlock_free: |
8e4e1713 | 2209 | ovs_unlock(); |
6093ae9a | 2210 | kfree_skb(reply); |
ccb1352e JG |
2211 | return err; |
2212 | } | |
2213 | ||
2214 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2215 | { | |
6b660c41 | 2216 | bool update_headroom = false; |
ccb1352e JG |
2217 | struct nlattr **a = info->attrs; |
2218 | struct sk_buff *reply; | |
3a927bc7 | 2219 | struct datapath *dp; |
ccb1352e | 2220 | struct vport *vport; |
6b660c41 | 2221 | unsigned int new_headroom; |
ccb1352e JG |
2222 | int err; |
2223 | ||
6093ae9a JR |
2224 | reply = ovs_vport_cmd_alloc_info(); |
2225 | if (!reply) | |
2226 | return -ENOMEM; | |
2227 | ||
8e4e1713 | 2228 | ovs_lock(); |
46df7b81 | 2229 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2230 | err = PTR_ERR(vport); |
2231 | if (IS_ERR(vport)) | |
6093ae9a | 2232 | goto exit_unlock_free; |
ccb1352e JG |
2233 | |
2234 | if (vport->port_no == OVSP_LOCAL) { | |
2235 | err = -EINVAL; | |
6093ae9a | 2236 | goto exit_unlock_free; |
ccb1352e JG |
2237 | } |
2238 | ||
9354d452 JB |
2239 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2240 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2241 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
6093ae9a | 2242 | BUG_ON(err < 0); |
3a927bc7 PA |
2243 | |
2244 | /* the vport deletion may trigger dp headroom update */ | |
2245 | dp = vport->dp; | |
2246 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2247 | update_headroom = true; |
2248 | ||
3a927bc7 | 2249 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2250 | ovs_dp_detach_port(vport); |
3a927bc7 | 2251 | |
6b660c41 TY |
2252 | if (update_headroom) { |
2253 | new_headroom = ovs_get_max_headroom(dp); | |
2254 | ||
2255 | if (new_headroom < dp->max_headroom) | |
2256 | ovs_update_headroom(dp, new_headroom); | |
2257 | } | |
6093ae9a | 2258 | ovs_unlock(); |
ccb1352e | 2259 | |
2a94fe48 | 2260 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2261 | return 0; |
ccb1352e | 2262 | |
6093ae9a | 2263 | exit_unlock_free: |
8e4e1713 | 2264 | ovs_unlock(); |
6093ae9a | 2265 | kfree_skb(reply); |
ccb1352e JG |
2266 | return err; |
2267 | } | |
2268 | ||
2269 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2270 | { | |
2271 | struct nlattr **a = info->attrs; | |
2272 | struct ovs_header *ovs_header = info->userhdr; | |
2273 | struct sk_buff *reply; | |
2274 | struct vport *vport; | |
2275 | int err; | |
2276 | ||
6093ae9a JR |
2277 | reply = ovs_vport_cmd_alloc_info(); |
2278 | if (!reply) | |
2279 | return -ENOMEM; | |
2280 | ||
ccb1352e | 2281 | rcu_read_lock(); |
46df7b81 | 2282 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2283 | err = PTR_ERR(vport); |
2284 | if (IS_ERR(vport)) | |
6093ae9a | 2285 | goto exit_unlock_free; |
9354d452 JB |
2286 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2287 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2288 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
6093ae9a | 2289 | BUG_ON(err < 0); |
ccb1352e JG |
2290 | rcu_read_unlock(); |
2291 | ||
2292 | return genlmsg_reply(reply, info); | |
2293 | ||
6093ae9a | 2294 | exit_unlock_free: |
ccb1352e | 2295 | rcu_read_unlock(); |
6093ae9a | 2296 | kfree_skb(reply); |
ccb1352e JG |
2297 | return err; |
2298 | } | |
2299 | ||
2300 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2301 | { | |
2302 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2303 | struct datapath *dp; | |
15eac2a7 PS |
2304 | int bucket = cb->args[0], skip = cb->args[1]; |
2305 | int i, j = 0; | |
ccb1352e | 2306 | |
42ee19e2 | 2307 | rcu_read_lock(); |
cc3a5ae6 | 2308 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2309 | if (!dp) { |
2310 | rcu_read_unlock(); | |
ccb1352e | 2311 | return -ENODEV; |
42ee19e2 | 2312 | } |
15eac2a7 | 2313 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2314 | struct vport *vport; |
15eac2a7 PS |
2315 | |
2316 | j = 0; | |
b67bfe0d | 2317 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2318 | if (j >= skip && |
2319 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2320 | sock_net(skb->sk), |
15e47304 | 2321 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2322 | cb->nlh->nlmsg_seq, |
2323 | NLM_F_MULTI, | |
d4e4fdf9 GN |
2324 | OVS_VPORT_CMD_GET, |
2325 | GFP_ATOMIC) < 0) | |
15eac2a7 PS |
2326 | goto out; |
2327 | ||
2328 | j++; | |
2329 | } | |
2330 | skip = 0; | |
ccb1352e | 2331 | } |
15eac2a7 | 2332 | out: |
ccb1352e JG |
2333 | rcu_read_unlock(); |
2334 | ||
15eac2a7 PS |
2335 | cb->args[0] = i; |
2336 | cb->args[1] = j; | |
ccb1352e | 2337 | |
15eac2a7 | 2338 | return skb->len; |
ccb1352e JG |
2339 | } |
2340 | ||
0c200ef9 PS |
2341 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2342 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2343 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2344 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2345 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
ea8564c8 | 2346 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
0c200ef9 | 2347 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
9354d452 JB |
2348 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2349 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2350 | }; |
2351 | ||
48e48a70 | 2352 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2353 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2354 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2355 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2356 | .doit = ovs_vport_cmd_new |
2357 | }, | |
2358 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2359 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2360 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2361 | .doit = ovs_vport_cmd_del |
2362 | }, | |
2363 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2364 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2365 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2366 | .doit = ovs_vport_cmd_get, |
2367 | .dumpit = ovs_vport_cmd_dump | |
2368 | }, | |
2369 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2370 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2371 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2372 | .doit = ovs_vport_cmd_set, |
2373 | }, | |
2374 | }; | |
2375 | ||
56989f6d | 2376 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2377 | .hdrsize = sizeof(struct ovs_header), |
2378 | .name = OVS_VPORT_FAMILY, | |
2379 | .version = OVS_VPORT_VERSION, | |
2380 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2381 | .policy = vport_policy, |
0c200ef9 PS |
2382 | .netnsok = true, |
2383 | .parallel_ops = true, | |
2384 | .ops = dp_vport_genl_ops, | |
2385 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2386 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2387 | .n_mcgrps = 1, | |
489111e5 | 2388 | .module = THIS_MODULE, |
ccb1352e JG |
2389 | }; |
2390 | ||
0c200ef9 PS |
2391 | static struct genl_family * const dp_genl_families[] = { |
2392 | &dp_datapath_genl_family, | |
2393 | &dp_vport_genl_family, | |
2394 | &dp_flow_genl_family, | |
2395 | &dp_packet_genl_family, | |
96fbc13d | 2396 | &dp_meter_genl_family, |
11efd5cb YHW |
2397 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2398 | &dp_ct_limit_genl_family, | |
2399 | #endif | |
ccb1352e JG |
2400 | }; |
2401 | ||
2402 | static void dp_unregister_genl(int n_families) | |
2403 | { | |
2404 | int i; | |
2405 | ||
2406 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2407 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2408 | } |
2409 | ||
56989f6d | 2410 | static int __init dp_register_genl(void) |
ccb1352e | 2411 | { |
ccb1352e JG |
2412 | int err; |
2413 | int i; | |
2414 | ||
ccb1352e | 2415 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2416 | |
0c200ef9 | 2417 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2418 | if (err) |
2419 | goto error; | |
ccb1352e JG |
2420 | } |
2421 | ||
2422 | return 0; | |
2423 | ||
2424 | error: | |
0c200ef9 | 2425 | dp_unregister_genl(i); |
ccb1352e JG |
2426 | return err; |
2427 | } | |
2428 | ||
46df7b81 PS |
2429 | static int __net_init ovs_init_net(struct net *net) |
2430 | { | |
2431 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2432 | ||
2433 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2434 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
11efd5cb | 2435 | return ovs_ct_init(net); |
46df7b81 PS |
2436 | } |
2437 | ||
7b4577a9 PS |
2438 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2439 | struct list_head *head) | |
46df7b81 | 2440 | { |
8e4e1713 | 2441 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2442 | struct datapath *dp; |
2443 | ||
2444 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2445 | int i; | |
2446 | ||
2447 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2448 | struct vport *vport; | |
2449 | ||
2450 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2451 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2452 | continue; | |
2453 | ||
be4ace6e | 2454 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2455 | list_add(&vport->detach_list, head); |
2456 | } | |
2457 | } | |
2458 | } | |
2459 | } | |
2460 | ||
2461 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2462 | { | |
2463 | struct datapath *dp, *dp_next; | |
2464 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2465 | struct vport *vport, *vport_next; | |
2466 | struct net *net; | |
2467 | LIST_HEAD(head); | |
46df7b81 | 2468 | |
8e4e1713 | 2469 | ovs_lock(); |
27de77ce TZ |
2470 | |
2471 | ovs_ct_exit(dnet); | |
2472 | ||
46df7b81 PS |
2473 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2474 | __dp_destroy(dp); | |
7b4577a9 | 2475 | |
f0b07bb1 | 2476 | down_read(&net_rwsem); |
7b4577a9 PS |
2477 | for_each_net(net) |
2478 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2479 | up_read(&net_rwsem); |
7b4577a9 PS |
2480 | |
2481 | /* Detach all vports from given namespace. */ | |
2482 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2483 | list_del(&vport->detach_list); | |
2484 | ovs_dp_detach_port(vport); | |
2485 | } | |
2486 | ||
8e4e1713 PS |
2487 | ovs_unlock(); |
2488 | ||
2489 | cancel_work_sync(&ovs_net->dp_notify_work); | |
46df7b81 PS |
2490 | } |
2491 | ||
2492 | static struct pernet_operations ovs_net_ops = { | |
2493 | .init = ovs_init_net, | |
2494 | .exit = ovs_exit_net, | |
2495 | .id = &ovs_net_id, | |
2496 | .size = sizeof(struct ovs_net), | |
2497 | }; | |
2498 | ||
ccb1352e JG |
2499 | static int __init dp_init(void) |
2500 | { | |
ccb1352e JG |
2501 | int err; |
2502 | ||
c593642c | 2503 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb)); |
ccb1352e JG |
2504 | |
2505 | pr_info("Open vSwitch switching datapath\n"); | |
2506 | ||
971427f3 | 2507 | err = action_fifos_init(); |
ccb1352e JG |
2508 | if (err) |
2509 | goto error; | |
2510 | ||
971427f3 AZ |
2511 | err = ovs_internal_dev_rtnl_link_register(); |
2512 | if (err) | |
2513 | goto error_action_fifos_exit; | |
2514 | ||
5b9e7e16 JP |
2515 | err = ovs_flow_init(); |
2516 | if (err) | |
2517 | goto error_unreg_rtnl_link; | |
2518 | ||
ccb1352e JG |
2519 | err = ovs_vport_init(); |
2520 | if (err) | |
2521 | goto error_flow_exit; | |
2522 | ||
46df7b81 | 2523 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2524 | if (err) |
2525 | goto error_vport_exit; | |
2526 | ||
46df7b81 PS |
2527 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2528 | if (err) | |
2529 | goto error_netns_exit; | |
2530 | ||
62b9c8d0 TG |
2531 | err = ovs_netdev_init(); |
2532 | if (err) | |
2533 | goto error_unreg_notifier; | |
2534 | ||
ccb1352e JG |
2535 | err = dp_register_genl(); |
2536 | if (err < 0) | |
62b9c8d0 | 2537 | goto error_unreg_netdev; |
ccb1352e | 2538 | |
ccb1352e JG |
2539 | return 0; |
2540 | ||
62b9c8d0 TG |
2541 | error_unreg_netdev: |
2542 | ovs_netdev_exit(); | |
ccb1352e JG |
2543 | error_unreg_notifier: |
2544 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2545 | error_netns_exit: |
2546 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2547 | error_vport_exit: |
2548 | ovs_vport_exit(); | |
2549 | error_flow_exit: | |
2550 | ovs_flow_exit(); | |
5b9e7e16 JP |
2551 | error_unreg_rtnl_link: |
2552 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2553 | error_action_fifos_exit: |
2554 | action_fifos_exit(); | |
ccb1352e JG |
2555 | error: |
2556 | return err; | |
2557 | } | |
2558 | ||
2559 | static void dp_cleanup(void) | |
2560 | { | |
ccb1352e | 2561 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2562 | ovs_netdev_exit(); |
ccb1352e | 2563 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2564 | unregister_pernet_device(&ovs_net_ops); |
2565 | rcu_barrier(); | |
ccb1352e JG |
2566 | ovs_vport_exit(); |
2567 | ovs_flow_exit(); | |
5b9e7e16 | 2568 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2569 | action_fifos_exit(); |
ccb1352e JG |
2570 | } |
2571 | ||
2572 | module_init(dp_init); | |
2573 | module_exit(dp_cleanup); | |
2574 | ||
2575 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2576 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2577 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2578 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2579 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2580 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2581 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2582 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |