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064af421 | 1 | /* |
e23775f2 | 2 | * Copyright (c) 2007-2015 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
064af421 BP |
21 | #include <linux/init.h> |
22 | #include <linux/module.h> | |
064af421 | 23 | #include <linux/if_arp.h> |
064af421 BP |
24 | #include <linux/if_vlan.h> |
25 | #include <linux/in.h> | |
26 | #include <linux/ip.h> | |
982b8810 | 27 | #include <linux/jhash.h> |
064af421 BP |
28 | #include <linux/delay.h> |
29 | #include <linux/time.h> | |
30 | #include <linux/etherdevice.h> | |
ed099e92 | 31 | #include <linux/genetlink.h> |
064af421 BP |
32 | #include <linux/kernel.h> |
33 | #include <linux/kthread.h> | |
064af421 BP |
34 | #include <linux/mutex.h> |
35 | #include <linux/percpu.h> | |
36 | #include <linux/rcupdate.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/udp.h> | |
39 | #include <linux/version.h> | |
40 | #include <linux/ethtool.h> | |
064af421 | 41 | #include <linux/wait.h> |
064af421 | 42 | #include <asm/div64.h> |
656a0e37 | 43 | #include <linux/highmem.h> |
064af421 BP |
44 | #include <linux/netfilter_bridge.h> |
45 | #include <linux/netfilter_ipv4.h> | |
46 | #include <linux/inetdevice.h> | |
47 | #include <linux/list.h> | |
077257b8 | 48 | #include <linux/openvswitch.h> |
064af421 | 49 | #include <linux/rculist.h> |
064af421 | 50 | #include <linux/dmi.h> |
36956a7d | 51 | #include <net/genetlink.h> |
2a4999f3 PS |
52 | #include <net/net_namespace.h> |
53 | #include <net/netns/generic.h> | |
907c26a8 | 54 | #include <net/nsh.h> |
064af421 | 55 | |
064af421 | 56 | #include "datapath.h" |
038e34ab | 57 | #include "conntrack.h" |
064af421 | 58 | #include "flow.h" |
d103f479 | 59 | #include "flow_table.h" |
a097c0b2 | 60 | #include "flow_netlink.h" |
1cb57039 | 61 | #include "meter.h" |
e23775f2 | 62 | #include "gso.h" |
f2459fe7 | 63 | #include "vport-internal_dev.h" |
d5de5b0d | 64 | #include "vport-netdev.h" |
064af421 | 65 | |
f56f0b73 | 66 | unsigned int ovs_net_id __read_mostly; |
2a4999f3 | 67 | |
cb25142c PS |
68 | static struct genl_family dp_packet_genl_family; |
69 | static struct genl_family dp_flow_genl_family; | |
70 | static struct genl_family dp_datapath_genl_family; | |
71 | ||
bc619e29 JS |
72 | static const struct nla_policy flow_policy[]; |
73 | ||
e515e66a GR |
74 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
75 | .name = OVS_FLOW_MCGROUP, | |
cb25142c PS |
76 | }; |
77 | ||
e515e66a GR |
78 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
79 | .name = OVS_DATAPATH_MCGROUP, | |
cb25142c PS |
80 | }; |
81 | ||
e515e66a GR |
82 | const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
83 | .name = OVS_VPORT_MCGROUP, | |
cb25142c PS |
84 | }; |
85 | ||
afad3556 | 86 | /* Check if need to build a reply message. |
af465b67 PS |
87 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. |
88 | */ | |
114fce23 SG |
89 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
90 | unsigned int group) | |
afad3556 JR |
91 | { |
92 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
6233a1bd | 93 | genl_has_listeners(family, genl_info_net(info), group); |
afad3556 JR |
94 | } |
95 | ||
e515e66a GR |
96 | static void ovs_notify(struct genl_family *family, |
97 | const struct genl_multicast_group *grp, | |
cb25142c | 98 | struct sk_buff *skb, struct genl_info *info) |
e297c6b7 | 99 | { |
0643a78b | 100 | genl_notify(family, skb, info, GROUP_ID(grp), GFP_KERNEL); |
e297c6b7 TG |
101 | } |
102 | ||
ed099e92 BP |
103 | /** |
104 | * DOC: Locking: | |
064af421 | 105 | * |
cd2a59e9 PS |
106 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
107 | * operations on vports, etc.), Writes to other state (flow table | |
108 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
109 | * by ovs_lock. | |
ed099e92 BP |
110 | * |
111 | * Reads are protected by RCU. | |
112 | * | |
113 | * There are a few special cases (mostly stats) that have their own | |
114 | * synchronization but they nest under all of above and don't interact with | |
115 | * each other. | |
cd2a59e9 PS |
116 | * |
117 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 118 | */ |
ed099e92 | 119 | |
cd2a59e9 PS |
120 | static DEFINE_MUTEX(ovs_mutex); |
121 | ||
122 | void ovs_lock(void) | |
123 | { | |
124 | mutex_lock(&ovs_mutex); | |
125 | } | |
126 | ||
127 | void ovs_unlock(void) | |
128 | { | |
129 | mutex_unlock(&ovs_mutex); | |
130 | } | |
131 | ||
132 | #ifdef CONFIG_LOCKDEP | |
133 | int lockdep_ovsl_is_held(void) | |
134 | { | |
135 | if (debug_locks) | |
136 | return lockdep_is_held(&ovs_mutex); | |
137 | else | |
138 | return 1; | |
139 | } | |
140 | #endif | |
141 | ||
5ae440c3 | 142 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 | 143 | const struct sw_flow_key *, |
4c7804f1 WT |
144 | const struct dp_upcall_info *, |
145 | uint32_t cutlen); | |
5ae440c3 | 146 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7d16c847 | 147 | const struct sw_flow_key *, |
4c7804f1 WT |
148 | const struct dp_upcall_info *, |
149 | uint32_t cutlen); | |
064af421 | 150 | |
cd2a59e9 | 151 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 152 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 153 | { |
cd2a59e9 | 154 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
e23775f2 | 155 | return ovs_vport_name(vport); |
f2459fe7 JG |
156 | } |
157 | ||
f1f60b85 | 158 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
159 | { |
160 | struct vport *local; | |
161 | int ifindex; | |
162 | ||
163 | rcu_read_lock(); | |
164 | ||
95b1d73a | 165 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 166 | if (local) |
e23775f2 | 167 | ifindex = local->dev->ifindex; |
99769a40 JG |
168 | else |
169 | ifindex = 0; | |
170 | ||
171 | rcu_read_unlock(); | |
172 | ||
173 | return ifindex; | |
174 | } | |
175 | ||
46c6a11d JG |
176 | static void destroy_dp_rcu(struct rcu_head *rcu) |
177 | { | |
178 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 179 | |
e379e4d1 | 180 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 181 | free_percpu(dp->stats_percpu); |
95b1d73a | 182 | kfree(dp->ports); |
1cb57039 | 183 | ovs_meters_exit(dp); |
5ca1ba48 | 184 | kfree(dp); |
46c6a11d JG |
185 | } |
186 | ||
95b1d73a PS |
187 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
188 | u16 port_no) | |
189 | { | |
190 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
191 | } | |
192 | ||
aa917006 | 193 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
194 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
195 | { | |
196 | struct vport *vport; | |
95b1d73a PS |
197 | struct hlist_head *head; |
198 | ||
199 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 200 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
201 | if (vport->port_no == port_no) |
202 | return vport; | |
203 | } | |
204 | return NULL; | |
205 | } | |
206 | ||
cd2a59e9 | 207 | /* Called with ovs_mutex. */ |
c19e6535 | 208 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 209 | { |
f2459fe7 | 210 | struct vport *vport; |
f2459fe7 | 211 | |
850b6b3b | 212 | vport = ovs_vport_add(parms); |
c19e6535 BP |
213 | if (!IS_ERR(vport)) { |
214 | struct datapath *dp = parms->dp; | |
95b1d73a | 215 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 216 | |
95b1d73a | 217 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 218 | } |
c19e6535 | 219 | return vport; |
064af421 BP |
220 | } |
221 | ||
850b6b3b | 222 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 223 | { |
cd2a59e9 | 224 | ASSERT_OVSL(); |
064af421 | 225 | |
064af421 | 226 | /* First drop references to device. */ |
95b1d73a | 227 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 228 | |
7237e4f4 | 229 | /* Then destroy it. */ |
850b6b3b | 230 | ovs_vport_del(p); |
064af421 BP |
231 | } |
232 | ||
fb66fbd1 | 233 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 234 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 235 | { |
a6059080 | 236 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 237 | struct datapath *dp = p->dp; |
3544358a | 238 | struct sw_flow *flow; |
ad50cb60 | 239 | struct sw_flow_actions *sf_acts; |
064af421 | 240 | struct dp_stats_percpu *stats; |
e9141eec | 241 | u64 *stats_counter; |
4fa72a95 | 242 | u32 n_mask_hit; |
381a020b | 243 | int error; |
064af421 | 244 | |
70dbc259 | 245 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 246 | |
52a23d92 | 247 | /* Look up flow. */ |
e74d4817 | 248 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 249 | &n_mask_hit); |
52a23d92 JG |
250 | if (unlikely(!flow)) { |
251 | struct dp_upcall_info upcall; | |
252 | ||
0e469d3b | 253 | memset(&upcall, 0, sizeof(upcall)); |
52a23d92 | 254 | upcall.cmd = OVS_PACKET_CMD_MISS; |
beb1c69a | 255 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
a94ebc39 | 256 | upcall.mru = OVS_CB(skb)->mru; |
4c7804f1 | 257 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
a7d607c5 LR |
258 | if (unlikely(error)) |
259 | kfree_skb(skb); | |
260 | else | |
261 | consume_skb(skb); | |
52a23d92 JG |
262 | stats_counter = &stats->n_missed; |
263 | goto out; | |
264 | } | |
265 | ||
e74d4817 | 266 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 267 | sf_acts = rcu_dereference(flow->sf_acts); |
381a020b YS |
268 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
269 | if (unlikely(error)) | |
270 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
271 | ovs_dp_name(dp), error); | |
7d16c847 | 272 | |
b0b906cc | 273 | stats_counter = &stats->n_hit; |
55574bb0 | 274 | |
8819fac7 | 275 | out: |
55574bb0 | 276 | /* Update datapath statistics. */ |
b81deb15 | 277 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 278 | (*stats_counter)++; |
4fa72a95 | 279 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 280 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
281 | } |
282 | ||
850b6b3b | 283 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 284 | const struct sw_flow_key *key, |
4c7804f1 WT |
285 | const struct dp_upcall_info *upcall_info, |
286 | uint32_t cutlen) | |
aa5a8fdc JG |
287 | { |
288 | struct dp_stats_percpu *stats; | |
289 | int err; | |
290 | ||
28aea917 | 291 | if (upcall_info->portid == 0) { |
b063d9f0 | 292 | err = -ENOTCONN; |
b063d9f0 JG |
293 | goto err; |
294 | } | |
295 | ||
7257b535 | 296 | if (!skb_is_gso(skb)) |
4c7804f1 | 297 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
7257b535 | 298 | else |
4c7804f1 | 299 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
d76195db JG |
300 | if (err) |
301 | goto err; | |
302 | ||
303 | return 0; | |
aa5a8fdc | 304 | |
aa5a8fdc | 305 | err: |
70dbc259 | 306 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 307 | |
b81deb15 | 308 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 309 | stats->n_lost++; |
b81deb15 | 310 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 311 | |
aa5a8fdc | 312 | return err; |
982b8810 BP |
313 | } |
314 | ||
5ae440c3 | 315 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 316 | const struct sw_flow_key *key, |
4c7804f1 WT |
317 | const struct dp_upcall_info *upcall_info, |
318 | uint32_t cutlen) | |
cb5087ca | 319 | { |
969b8e6b | 320 | #ifdef HAVE_SKB_GSO_UDP |
f54a7a5d | 321 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
7257b535 | 322 | struct sw_flow_key later_key; |
969b8e6b | 323 | #endif |
7257b535 | 324 | struct sk_buff *segs, *nskb; |
b2a23c4e | 325 | struct ovs_skb_cb ovs_cb; |
7257b535 | 326 | int err; |
cb5087ca | 327 | |
b2a23c4e | 328 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 329 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 330 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
331 | if (IS_ERR(segs)) |
332 | return PTR_ERR(segs); | |
d1da7669 PS |
333 | if (segs == NULL) |
334 | return -EINVAL; | |
969b8e6b | 335 | #ifdef HAVE_SKB_GSO_UDP |
9b277b39 | 336 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 337 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
338 | * in this case is for a first fragment, so we need to |
339 | * properly mark later fragments. | |
340 | */ | |
e74d4817 | 341 | later_key = *key; |
9b277b39 PS |
342 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
343 | } | |
969b8e6b | 344 | #endif |
7257b535 | 345 | /* Queue all of the segments. */ |
c225ff05 | 346 | skb_list_walk_safe(segs, skb, nskb) { |
b2a23c4e | 347 | *OVS_CB(skb) = ovs_cb; |
969b8e6b | 348 | #ifdef HAVE_SKB_GSO_UDP |
9b277b39 | 349 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 350 | key = &later_key; |
969b8e6b | 351 | #endif |
4c7804f1 | 352 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
982b8810 | 353 | if (err) |
7257b535 | 354 | break; |
856081f6 | 355 | |
c225ff05 | 356 | } |
cb5087ca | 357 | |
7257b535 | 358 | /* Free all of the segments. */ |
c225ff05 | 359 | skb_list_walk_safe(segs, skb, nskb) { |
7257b535 BP |
360 | if (err) |
361 | kfree_skb(skb); | |
362 | else | |
363 | consume_skb(skb); | |
c225ff05 | 364 | } |
7257b535 BP |
365 | return err; |
366 | } | |
367 | ||
8b7ea2d4 | 368 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
6b330a60 | 369 | unsigned int hdrlen, int actions_attrlen) |
0afa2373 TG |
370 | { |
371 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 372 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
039fb36c | 373 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
9ba57fc7 HZ |
374 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ |
375 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
0afa2373 TG |
376 | |
377 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
378 | if (upcall_info->userdata) |
379 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
380 | ||
381 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
382 | if (upcall_info->egress_tun_info) | |
383 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 | 384 | |
0e469d3b NM |
385 | /* OVS_PACKET_ATTR_ACTIONS */ |
386 | if (upcall_info->actions_len) | |
6b330a60 | 387 | size += nla_total_size(actions_attrlen); |
0e469d3b | 388 | |
a94ebc39 JS |
389 | /* OVS_PACKET_ATTR_MRU */ |
390 | if (upcall_info->mru) | |
391 | size += nla_total_size(sizeof(upcall_info->mru)); | |
392 | ||
0afa2373 TG |
393 | return size; |
394 | } | |
395 | ||
a94ebc39 JS |
396 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
397 | { | |
398 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
399 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
400 | ||
401 | if (plen > 0) | |
0ace0a26 | 402 | skb_put_zero(skb, plen); |
a94ebc39 JS |
403 | } |
404 | } | |
405 | ||
5ae440c3 | 406 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 407 | const struct sw_flow_key *key, |
4c7804f1 WT |
408 | const struct dp_upcall_info *upcall_info, |
409 | uint32_t cutlen) | |
7257b535 BP |
410 | { |
411 | struct ovs_header *upcall; | |
6161d3fd | 412 | struct sk_buff *nskb = NULL; |
82706a6f | 413 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 414 | struct nlattr *nla; |
978188b2 | 415 | size_t len; |
533bea51 | 416 | unsigned int hlen; |
5ae440c3 | 417 | int err, dp_ifindex; |
9ba57fc7 | 418 | u64 hash; |
5ae440c3 TG |
419 | |
420 | dp_ifindex = get_dpifindex(dp); | |
421 | if (!dp_ifindex) | |
422 | return -ENODEV; | |
7257b535 | 423 | |
efd8a18e | 424 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
425 | nskb = skb_clone(skb, GFP_ATOMIC); |
426 | if (!nskb) | |
427 | return -ENOMEM; | |
07ac71ea | 428 | |
8063e095 | 429 | nskb = __vlan_hwaccel_push_inside(nskb); |
07ac71ea PS |
430 | if (!nskb) |
431 | return -ENOMEM; | |
432 | ||
6161d3fd JG |
433 | skb = nskb; |
434 | } | |
435 | ||
436 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
437 | err = -EFBIG; | |
438 | goto out; | |
439 | } | |
7257b535 | 440 | |
533bea51 TG |
441 | /* Complete checksum if needed */ |
442 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
a0c9fedc | 443 | (err = skb_csum_hwoffload_help(skb, 0))) |
533bea51 TG |
444 | goto out; |
445 | ||
446 | /* Older versions of OVS user space enforce alignment of the last | |
447 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
448 | * padding logic. Only perform zerocopy if padding is not required. | |
449 | */ | |
450 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
451 | hlen = skb_zerocopy_headlen(skb); | |
452 | else | |
453 | hlen = skb->len; | |
454 | ||
6b330a60 GR |
455 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
456 | OVS_CB(skb)->acts_origlen); | |
40c08cda | 457 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
6161d3fd JG |
458 | if (!user_skb) { |
459 | err = -ENOMEM; | |
460 | goto out; | |
461 | } | |
7257b535 BP |
462 | |
463 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
464 | 0, upcall_info->cmd); | |
f463bdc9 KL |
465 | if (!upcall) { |
466 | err = -EINVAL; | |
467 | goto out; | |
468 | } | |
7257b535 BP |
469 | upcall->dp_ifindex = dp_ifindex; |
470 | ||
db7f2238 | 471 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
5821a592 EC |
472 | if (err) |
473 | goto out; | |
7257b535 BP |
474 | |
475 | if (upcall_info->userdata) | |
e995e3df | 476 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 477 | nla_len(upcall_info->userdata), |
e995e3df | 478 | nla_data(upcall_info->userdata)); |
7257b535 | 479 | |
e23775f2 | 480 | |
8b7ea2d4 | 481 | if (upcall_info->egress_tun_info) { |
09c33996 YHW |
482 | nla = nla_nest_start_noflag(user_skb, |
483 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
eee4c8eb KL |
484 | if (!nla) { |
485 | err = -EMSGSIZE; | |
486 | goto out; | |
487 | } | |
aad7cb91 PS |
488 | err = ovs_nla_put_tunnel_info(user_skb, |
489 | upcall_info->egress_tun_info); | |
5821a592 EC |
490 | if (err) |
491 | goto out; | |
492 | ||
8b7ea2d4 WZ |
493 | nla_nest_end(user_skb, nla); |
494 | } | |
495 | ||
0e469d3b | 496 | if (upcall_info->actions_len) { |
09c33996 | 497 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
eee4c8eb KL |
498 | if (!nla) { |
499 | err = -EMSGSIZE; | |
500 | goto out; | |
501 | } | |
0e469d3b NM |
502 | err = ovs_nla_put_actions(upcall_info->actions, |
503 | upcall_info->actions_len, | |
504 | user_skb); | |
505 | if (!err) | |
506 | nla_nest_end(user_skb, nla); | |
507 | else | |
508 | nla_nest_cancel(user_skb, nla); | |
509 | } | |
510 | ||
a94ebc39 | 511 | /* Add OVS_PACKET_ATTR_MRU */ |
11047d57 TZ |
512 | if (upcall_info->mru && |
513 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
514 | err = -ENOBUFS; | |
515 | goto out; | |
a94ebc39 JS |
516 | } |
517 | ||
039fb36c | 518 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
11047d57 TZ |
519 | if (cutlen > 0 && |
520 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
521 | err = -ENOBUFS; | |
522 | goto out; | |
039fb36c WT |
523 | } |
524 | ||
9ba57fc7 HZ |
525 | /* Add OVS_PACKET_ATTR_HASH */ |
526 | hash = skb_get_hash_raw(skb); | |
527 | #ifdef HAVE_SW_HASH | |
528 | if (skb->sw_hash) | |
529 | hash |= OVS_PACKET_HASH_SW_BIT; | |
530 | #endif | |
531 | ||
9ba57fc7 | 532 | if (skb->l4_hash) |
9ba57fc7 HZ |
533 | hash |= OVS_PACKET_HASH_L4_BIT; |
534 | ||
535 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
536 | err = -ENOBUFS; | |
537 | goto out; | |
538 | } | |
539 | ||
533bea51 | 540 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
541 | * in skb_zerocopy() |
542 | */ | |
533bea51 TG |
543 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
544 | err = -ENOBUFS; | |
545 | goto out; | |
546 | } | |
4c7804f1 | 547 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
bed53bd1 | 548 | |
4c7804f1 | 549 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
2c272bd9 ZK |
550 | if (err) |
551 | goto out; | |
7257b535 | 552 | |
ef507cec | 553 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
a94ebc39 | 554 | pad_packet(dp, user_skb); |
ef507cec | 555 | |
533bea51 | 556 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 557 | |
533bea51 | 558 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 559 | user_skb = NULL; |
6161d3fd | 560 | out: |
2c272bd9 ZK |
561 | if (err) |
562 | skb_tx_error(skb); | |
82706a6f | 563 | kfree_skb(user_skb); |
6161d3fd JG |
564 | kfree_skb(nskb); |
565 | return err; | |
cb5087ca BP |
566 | } |
567 | ||
df2c07f4 | 568 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 569 | { |
df2c07f4 | 570 | struct ovs_header *ovs_header = info->userhdr; |
a94ebc39 | 571 | struct net *net = sock_net(skb->sk); |
982b8810 | 572 | struct nlattr **a = info->attrs; |
e0e57990 | 573 | struct sw_flow_actions *acts; |
982b8810 | 574 | struct sk_buff *packet; |
e0e57990 | 575 | struct sw_flow *flow; |
ad50cb60 | 576 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 577 | struct datapath *dp; |
a6059080 | 578 | struct vport *input_vport; |
a94ebc39 | 579 | u16 mru = 0; |
9ba57fc7 | 580 | u64 hash; |
3f19d399 | 581 | int len; |
d6569377 | 582 | int err; |
2e460098 | 583 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 584 | |
f7cd0081 | 585 | err = -EINVAL; |
df2c07f4 | 586 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 587 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 588 | goto err; |
064af421 | 589 | |
df2c07f4 | 590 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 591 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
592 | err = -ENOMEM; |
593 | if (!packet) | |
e5cad958 | 594 | goto err; |
3f19d399 BP |
595 | skb_reserve(packet, NET_IP_ALIGN); |
596 | ||
bf3d6fce | 597 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 598 | |
a94ebc39 JS |
599 | /* Set packet's mru */ |
600 | if (a[OVS_PACKET_ATTR_MRU]) { | |
601 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
602 | packet->ignore_df = 1; | |
603 | } | |
604 | OVS_CB(packet)->mru = mru; | |
605 | ||
9ba57fc7 HZ |
606 | if (a[OVS_PACKET_ATTR_HASH]) { |
607 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
608 | ||
609 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
610 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
611 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
612 | } | |
613 | ||
e0e57990 | 614 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 615 | flow = ovs_flow_alloc(); |
e0e57990 BP |
616 | err = PTR_ERR(flow); |
617 | if (IS_ERR(flow)) | |
e5cad958 | 618 | goto err_kfree_skb; |
064af421 | 619 | |
038e34ab JS |
620 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
621 | packet, &flow->key, log); | |
e0e57990 | 622 | if (err) |
9321954a | 623 | goto err_flow_free; |
e0e57990 | 624 | |
a94ebc39 | 625 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 626 | &flow->key, &acts, log); |
9b405f1a PS |
627 | if (err) |
628 | goto err_flow_free; | |
e0e57990 | 629 | |
ff27161e | 630 | rcu_assign_pointer(flow->sf_acts, acts); |
abff858b | 631 | packet->priority = flow->key.phy.priority; |
3025a772 | 632 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 633 | |
d6569377 | 634 | rcu_read_lock(); |
a94ebc39 | 635 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
f7cd0081 | 636 | err = -ENODEV; |
e5cad958 BP |
637 | if (!dp) |
638 | goto err_unlock; | |
cc4015df | 639 | |
a6059080 AZ |
640 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
641 | if (!input_vport) | |
642 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
643 | ||
644 | if (!input_vport) | |
645 | goto err_unlock; | |
646 | ||
e23775f2 | 647 | packet->dev = input_vport->dev; |
a6059080 | 648 | OVS_CB(packet)->input_vport = input_vport; |
ad50cb60 | 649 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 650 | |
e9141eec | 651 | local_bh_disable(); |
7d16c847 | 652 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 653 | local_bh_enable(); |
d6569377 | 654 | rcu_read_unlock(); |
e0e57990 | 655 | |
a1c564be | 656 | ovs_flow_free(flow, false); |
e5cad958 | 657 | return err; |
064af421 | 658 | |
e5cad958 BP |
659 | err_unlock: |
660 | rcu_read_unlock(); | |
9321954a | 661 | err_flow_free: |
a1c564be | 662 | ovs_flow_free(flow, false); |
e5cad958 BP |
663 | err_kfree_skb: |
664 | kfree_skb(packet); | |
665 | err: | |
d6569377 | 666 | return err; |
064af421 BP |
667 | } |
668 | ||
df2c07f4 | 669 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 670 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
671 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
672 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 673 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
a94ebc39 | 674 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
9ba57fc7 | 675 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, |
982b8810 BP |
676 | }; |
677 | ||
18fd3a52 | 678 | static struct genl_ops dp_packet_genl_ops[] = { |
df2c07f4 | 679 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
f1e9590e YHW |
680 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
681 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
682 | #endif | |
a6a8674d | 683 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 684 | #ifdef HAVE_GENL_OPS_POLICY |
982b8810 | 685 | .policy = packet_policy, |
2ef0f1c2 | 686 | #endif |
df2c07f4 | 687 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
688 | } |
689 | }; | |
690 | ||
ba63fe26 | 691 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
cb25142c PS |
692 | .hdrsize = sizeof(struct ovs_header), |
693 | .name = OVS_PACKET_FAMILY, | |
694 | .version = OVS_PACKET_VERSION, | |
695 | .maxattr = OVS_PACKET_ATTR_MAX, | |
2ef0f1c2 JB |
696 | #ifndef HAVE_GENL_OPS_POLICY |
697 | .policy = packet_policy, | |
698 | #endif | |
cb25142c PS |
699 | .netnsok = true, |
700 | .parallel_ops = true, | |
701 | .ops = dp_packet_genl_ops, | |
702 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
ba63fe26 | 703 | .module = THIS_MODULE, |
cb25142c PS |
704 | }; |
705 | ||
f1f60b85 | 706 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 707 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 708 | { |
d6569377 | 709 | int i; |
f180c2e2 | 710 | |
4fa72a95 AZ |
711 | memset(mega_stats, 0, sizeof(*mega_stats)); |
712 | ||
994dc286 | 713 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 714 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 715 | |
7257b535 | 716 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 717 | |
d6569377 BP |
718 | for_each_possible_cpu(i) { |
719 | const struct dp_stats_percpu *percpu_stats; | |
720 | struct dp_stats_percpu local_stats; | |
821cb9fa | 721 | unsigned int start; |
44e05eca | 722 | |
d6569377 | 723 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 724 | |
d6569377 | 725 | do { |
b81deb15 | 726 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 727 | local_stats = *percpu_stats; |
b81deb15 | 728 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 729 | |
d6569377 BP |
730 | stats->n_hit += local_stats.n_hit; |
731 | stats->n_missed += local_stats.n_missed; | |
732 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 733 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
734 | } |
735 | } | |
064af421 | 736 | |
bc619e29 JS |
737 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
738 | { | |
739 | return ovs_identifier_is_ufid(sfid) && | |
740 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
741 | } | |
742 | ||
743 | static bool should_fill_mask(uint32_t ufid_flags) | |
744 | { | |
745 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
746 | } | |
747 | ||
748 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 749 | { |
bc619e29 JS |
750 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
751 | } | |
752 | ||
753 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
754 | const struct sw_flow_id *sfid, | |
755 | uint32_t ufid_flags) | |
756 | { | |
757 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
758 | ||
244674ed PA |
759 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback |
760 | * see ovs_nla_put_identifier() | |
761 | */ | |
bc619e29 JS |
762 | if (sfid && ovs_identifier_is_ufid(sfid)) |
763 | len += nla_total_size(sfid->ufid_len); | |
244674ed PA |
764 | else |
765 | len += nla_total_size(ovs_key_attr_size()); | |
bc619e29 JS |
766 | |
767 | /* OVS_FLOW_ATTR_KEY */ | |
768 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
769 | len += nla_total_size(ovs_key_attr_size()); | |
770 | ||
771 | /* OVS_FLOW_ATTR_MASK */ | |
772 | if (should_fill_mask(ufid_flags)) | |
773 | len += nla_total_size(ovs_key_attr_size()); | |
774 | ||
775 | /* OVS_FLOW_ATTR_ACTIONS */ | |
776 | if (should_fill_actions(ufid_flags)) | |
c3bb15b3 | 777 | len += nla_total_size(acts->orig_len); |
bc619e29 JS |
778 | |
779 | return len | |
91b37647 | 780 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
0afa2373 | 781 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
91b37647 | 782 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
783 | } |
784 | ||
f1948bb9 JS |
785 | /* Called with ovs_mutex or RCU read lock. */ |
786 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
787 | struct sk_buff *skb) | |
788 | { | |
789 | struct ovs_flow_stats stats; | |
790 | __be16 tcp_flags; | |
791 | unsigned long used; | |
792 | ||
b0f3a2fe | 793 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 794 | |
b0f3a2fe | 795 | if (used && |
89be7da8 PS |
796 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
797 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 798 | return -EMSGSIZE; |
d6569377 | 799 | |
b0f3a2fe | 800 | if (stats.n_packets && |
91b37647 PS |
801 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
802 | sizeof(struct ovs_flow_stats), &stats, | |
803 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 804 | return -EMSGSIZE; |
b0b906cc | 805 | |
b0f3a2fe PS |
806 | if ((u8)ntohs(tcp_flags) && |
807 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
808 | return -EMSGSIZE; |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | /* Called with ovs_mutex or RCU read lock. */ | |
814 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
815 | struct sk_buff *skb, int skb_orig_len) | |
816 | { | |
817 | struct nlattr *start; | |
818 | int err; | |
d6569377 | 819 | |
df2c07f4 | 820 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
821 | * this is the first flow to be dumped into 'skb'. This is unusual for |
822 | * Netlink but individual action lists can be longer than | |
823 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
824 | * The userspace caller can always fetch the actions separately if it | |
825 | * really wants them. (Most userspace callers in fact don't care.) | |
826 | * | |
827 | * This can only fail for dump operations because the skb is always | |
828 | * properly sized for single flows. | |
829 | */ | |
09c33996 | 830 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 831 | if (start) { |
f44ccce1 PS |
832 | const struct sw_flow_actions *sf_acts; |
833 | ||
780ec6ae | 834 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
835 | err = ovs_nla_put_actions(sf_acts->actions, |
836 | sf_acts->actions_len, skb); | |
f71db6b1 | 837 | |
0a25b039 BP |
838 | if (!err) |
839 | nla_nest_end(skb, start); | |
840 | else { | |
841 | if (skb_orig_len) | |
f1948bb9 | 842 | return err; |
0a25b039 BP |
843 | |
844 | nla_nest_cancel(skb, start); | |
845 | } | |
f1948bb9 JS |
846 | } else if (skb_orig_len) { |
847 | return -EMSGSIZE; | |
848 | } | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 854 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 855 | struct sk_buff *skb, u32 portid, |
bc619e29 | 856 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
857 | { |
858 | const int skb_orig_len = skb->len; | |
859 | struct ovs_header *ovs_header; | |
860 | int err; | |
861 | ||
7d16c847 PS |
862 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
863 | flags, cmd); | |
f1948bb9 JS |
864 | if (!ovs_header) |
865 | return -EMSGSIZE; | |
7d16c847 | 866 | |
f1948bb9 JS |
867 | ovs_header->dp_ifindex = dp_ifindex; |
868 | ||
bc619e29 | 869 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
870 | if (err) |
871 | goto error; | |
872 | ||
bc619e29 JS |
873 | if (should_fill_key(&flow->id, ufid_flags)) { |
874 | err = ovs_nla_put_masked_key(flow, skb); | |
875 | if (err) | |
876 | goto error; | |
877 | } | |
878 | ||
879 | if (should_fill_mask(ufid_flags)) { | |
880 | err = ovs_nla_put_mask(flow, skb); | |
881 | if (err) | |
882 | goto error; | |
883 | } | |
f1948bb9 JS |
884 | |
885 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
886 | if (err) | |
887 | goto error; | |
888 | ||
bc619e29 JS |
889 | if (should_fill_actions(ufid_flags)) { |
890 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
891 | if (err) | |
892 | goto error; | |
893 | } | |
37a1300c | 894 | |
23b48dc1 TG |
895 | genlmsg_end(skb, ovs_header); |
896 | return 0; | |
d6569377 | 897 | |
37a1300c | 898 | error: |
df2c07f4 | 899 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 900 | return err; |
44e05eca BP |
901 | } |
902 | ||
f71db6b1 JR |
903 | /* May not be called with RCU read lock. */ |
904 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 905 | const struct sw_flow_id *sfid, |
afad3556 | 906 | struct genl_info *info, |
bc619e29 JS |
907 | bool always, |
908 | uint32_t ufid_flags) | |
44e05eca | 909 | { |
afad3556 | 910 | struct sk_buff *skb; |
bc619e29 | 911 | size_t len; |
d6569377 | 912 | |
114fce23 SG |
913 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
914 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
915 | return NULL; |
916 | ||
bc619e29 | 917 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
40c08cda | 918 | skb = genlmsg_new(len, GFP_KERNEL); |
afad3556 JR |
919 | if (!skb) |
920 | return ERR_PTR(-ENOMEM); | |
921 | ||
922 | return skb; | |
37a1300c | 923 | } |
8d5ebd83 | 924 | |
f71db6b1 | 925 | /* Called with ovs_mutex. */ |
7d16c847 | 926 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
927 | int dp_ifindex, |
928 | struct genl_info *info, u8 cmd, | |
bc619e29 | 929 | bool always, u32 ufid_flags) |
37a1300c BP |
930 | { |
931 | struct sk_buff *skb; | |
932 | int retval; | |
d6569377 | 933 | |
bc619e29 JS |
934 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
935 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 936 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 937 | return skb; |
d6569377 | 938 | |
2c622e5a | 939 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 940 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 941 | cmd, ufid_flags); |
90b36b02 PA |
942 | if (WARN_ON_ONCE(retval < 0)) { |
943 | kfree_skb(skb); | |
944 | skb = ERR_PTR(retval); | |
945 | } | |
d6569377 | 946 | return skb; |
064af421 BP |
947 | } |
948 | ||
0c9fd022 | 949 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 950 | { |
a94ebc39 | 951 | struct net *net = sock_net(skb->sk); |
37a1300c | 952 | struct nlattr **a = info->attrs; |
df2c07f4 | 953 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 954 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 955 | struct sw_flow_mask mask; |
37a1300c | 956 | struct sk_buff *reply; |
9c52546b | 957 | struct datapath *dp; |
0c9fd022 | 958 | struct sw_flow_actions *acts; |
a1c564be | 959 | struct sw_flow_match match; |
bc619e29 | 960 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 961 | int error; |
9233cef7 | 962 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 963 | |
6740b721 | 964 | /* Must have key and actions. */ |
37a1300c | 965 | error = -EINVAL; |
a473df5b | 966 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 967 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 968 | goto error; |
a473df5b JG |
969 | } |
970 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 971 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 972 | goto error; |
a473df5b | 973 | } |
a1c564be | 974 | |
6740b721 | 975 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
976 | * locking. |
977 | */ | |
6740b721 JR |
978 | new_flow = ovs_flow_alloc(); |
979 | if (IS_ERR(new_flow)) { | |
980 | error = PTR_ERR(new_flow); | |
981 | goto error; | |
982 | } | |
983 | ||
984 | /* Extract key. */ | |
9b94fa6c | 985 | ovs_match_init(&match, &new_flow->key, false, &mask); |
038e34ab | 986 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 987 | a[OVS_FLOW_ATTR_MASK], log); |
37a1300c | 988 | if (error) |
6740b721 | 989 | goto err_kfree_flow; |
064af421 | 990 | |
bc619e29 JS |
991 | /* Extract flow identifier. */ |
992 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
1d334d4f | 993 | &new_flow->key, log); |
bc619e29 JS |
994 | if (error) |
995 | goto err_kfree_flow; | |
9b405f1a | 996 | |
1d334d4f | 997 | /* unmasked key is needed to match when ufid is not used. */ |
998 | if (ovs_identifier_is_key(&new_flow->id)) | |
999 | match.key = new_flow->id.unmasked_key; | |
1000 | ||
1001 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
1002 | ||
6740b721 | 1003 | /* Validate actions. */ |
a94ebc39 JS |
1004 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
1005 | &new_flow->key, &acts, log); | |
0c9fd022 | 1006 | if (error) { |
7d16c847 | 1007 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 1008 | goto err_kfree_flow; |
6740b721 JR |
1009 | } |
1010 | ||
bc619e29 JS |
1011 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
1012 | ufid_flags); | |
6740b721 JR |
1013 | if (IS_ERR(reply)) { |
1014 | error = PTR_ERR(reply); | |
1015 | goto err_kfree_acts; | |
37a1300c BP |
1016 | } |
1017 | ||
cd2a59e9 | 1018 | ovs_lock(); |
a94ebc39 | 1019 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1020 | if (unlikely(!dp)) { |
1021 | error = -ENODEV; | |
cd2a59e9 | 1022 | goto err_unlock_ovs; |
6740b721 | 1023 | } |
bc619e29 | 1024 | |
a1c564be | 1025 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
1026 | if (ovs_identifier_is_ufid(&new_flow->id)) |
1027 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
1028 | if (!flow) | |
1d334d4f | 1029 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
6740b721 JR |
1030 | if (likely(!flow)) { |
1031 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 1032 | |
d6569377 | 1033 | /* Put flow in bucket. */ |
6740b721 JR |
1034 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1035 | if (unlikely(error)) { | |
0585f7a8 | 1036 | acts = NULL; |
6740b721 JR |
1037 | goto err_unlock_ovs; |
1038 | } | |
1039 | ||
1040 | if (unlikely(reply)) { | |
2c622e5a | 1041 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
1042 | ovs_header->dp_ifindex, |
1043 | reply, info->snd_portid, | |
1044 | info->snd_seq, 0, | |
bc619e29 JS |
1045 | OVS_FLOW_CMD_NEW, |
1046 | ufid_flags); | |
6740b721 | 1047 | BUG_ON(error < 0); |
0585f7a8 | 1048 | } |
6740b721 | 1049 | ovs_unlock(); |
d6569377 | 1050 | } else { |
0c9fd022 JR |
1051 | struct sw_flow_actions *old_acts; |
1052 | ||
d6569377 BP |
1053 | /* Bail out if we're not allowed to modify an existing flow. |
1054 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1055 | * because Generic Netlink treats the latter as a dump | |
1056 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1057 | * gets fixed. | |
1058 | */ | |
6740b721 JR |
1059 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1060 | | NLM_F_EXCL))) { | |
1061 | error = -EEXIST; | |
cd2a59e9 | 1062 | goto err_unlock_ovs; |
6740b721 | 1063 | } |
bc619e29 JS |
1064 | /* The flow identifier has to be the same for flow updates. |
1065 | * Look for any overlapping flow. | |
1066 | */ | |
1067 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1068 | if (ovs_identifier_is_key(&flow->id)) | |
1069 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1070 | &match); | |
1071 | else /* UFID matches but key is different */ | |
1072 | flow = NULL; | |
3440e4bc AW |
1073 | if (!flow) { |
1074 | error = -ENOENT; | |
1075 | goto err_unlock_ovs; | |
1076 | } | |
6740b721 | 1077 | } |
0c9fd022 JR |
1078 | /* Update actions. */ |
1079 | old_acts = ovsl_dereference(flow->sf_acts); | |
1080 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1081 | |
6740b721 | 1082 | if (unlikely(reply)) { |
2c622e5a | 1083 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1084 | ovs_header->dp_ifindex, |
1085 | reply, info->snd_portid, | |
1086 | info->snd_seq, 0, | |
bc619e29 JS |
1087 | OVS_FLOW_CMD_NEW, |
1088 | ufid_flags); | |
6740b721 JR |
1089 | BUG_ON(error < 0); |
1090 | } | |
1091 | ovs_unlock(); | |
0c9fd022 | 1092 | |
e23775f2 | 1093 | ovs_nla_free_flow_actions_rcu(old_acts); |
6740b721 | 1094 | ovs_flow_free(new_flow, false); |
0c9fd022 | 1095 | } |
6740b721 JR |
1096 | |
1097 | if (reply) | |
cb25142c | 1098 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1099 | return 0; |
1100 | ||
0c9fd022 JR |
1101 | err_unlock_ovs: |
1102 | ovs_unlock(); | |
6740b721 JR |
1103 | kfree_skb(reply); |
1104 | err_kfree_acts: | |
e23775f2 | 1105 | ovs_nla_free_flow_actions(acts); |
6740b721 JR |
1106 | err_kfree_flow: |
1107 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1108 | error: |
1109 | return error; | |
1110 | } | |
1111 | ||
cc561abf | 1112 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
19b6110d | 1113 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
a94ebc39 | 1114 | const struct nlattr *a, |
cc561abf | 1115 | const struct sw_flow_key *key, |
9233cef7 JR |
1116 | const struct sw_flow_mask *mask, |
1117 | bool log) | |
cc561abf PS |
1118 | { |
1119 | struct sw_flow_actions *acts; | |
1120 | struct sw_flow_key masked_key; | |
1121 | int error; | |
1122 | ||
ad4adec2 | 1123 | ovs_flow_mask_key(&masked_key, key, true, mask); |
a94ebc39 | 1124 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
cc561abf | 1125 | if (error) { |
9233cef7 | 1126 | OVS_NLERR(log, |
7d16c847 | 1127 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1128 | return ERR_PTR(error); |
1129 | } | |
1130 | ||
1131 | return acts; | |
1132 | } | |
1133 | ||
850c2a4d TZ |
1134 | /* Factor out match-init and action-copy to avoid |
1135 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1136 | * used to get actions, we new a function to save some | |
1137 | * stack space. | |
1138 | * | |
1139 | * If there are not key and action attrs, we return 0 | |
1140 | * directly. In the case, the caller will also not use the | |
1141 | * match as before. If there is action attr, we try to get | |
1142 | * actions and save them to *acts. Before returning from | |
1143 | * the function, we reset the match->mask pointer. Because | |
1144 | * we should not to return match object with dangling reference | |
1145 | * to mask. | |
1146 | * */ | |
19b6110d AB |
1147 | static noinline_for_stack int |
1148 | ovs_nla_init_match_and_action(struct net *net, | |
1149 | struct sw_flow_match *match, | |
1150 | struct sw_flow_key *key, | |
1151 | struct nlattr **a, | |
1152 | struct sw_flow_actions **acts, | |
1153 | bool log) | |
850c2a4d TZ |
1154 | { |
1155 | struct sw_flow_mask mask; | |
1156 | int error = 0; | |
1157 | ||
1158 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1159 | ovs_match_init(match, key, true, &mask); | |
1160 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1161 | a[OVS_FLOW_ATTR_MASK], log); | |
1162 | if (error) | |
1163 | goto error; | |
1164 | } | |
1165 | ||
1166 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1167 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1168 | OVS_NLERR(log, | |
1169 | "Flow key attribute not present in set flow."); | |
497895ca CJ |
1170 | error = -EINVAL; |
1171 | goto error; | |
850c2a4d TZ |
1172 | } |
1173 | ||
1174 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1175 | &mask, log); | |
1176 | if (IS_ERR(*acts)) { | |
1177 | error = PTR_ERR(*acts); | |
1178 | goto error; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | /* On success, error is 0. */ | |
1183 | error: | |
1184 | match->mask = NULL; | |
1185 | return error; | |
1186 | } | |
1187 | ||
0c9fd022 JR |
1188 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1189 | { | |
a94ebc39 | 1190 | struct net *net = sock_net(skb->sk); |
0c9fd022 JR |
1191 | struct nlattr **a = info->attrs; |
1192 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1193 | struct sw_flow_key key; |
0c9fd022 | 1194 | struct sw_flow *flow; |
0c9fd022 JR |
1195 | struct sk_buff *reply = NULL; |
1196 | struct datapath *dp; | |
6740b721 | 1197 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1198 | struct sw_flow_match match; |
bc619e29 JS |
1199 | struct sw_flow_id sfid; |
1200 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
b24baa1a | 1201 | int error = 0; |
9233cef7 | 1202 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1203 | bool ufid_present; |
0c9fd022 | 1204 | |
bc619e29 | 1205 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
850c2a4d | 1206 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
b24baa1a PS |
1207 | OVS_NLERR(log, |
1208 | "Flow set message rejected, Key attribute missing."); | |
850c2a4d | 1209 | return -EINVAL; |
b24baa1a | 1210 | } |
850c2a4d TZ |
1211 | |
1212 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1213 | &acts, log); | |
0c9fd022 JR |
1214 | if (error) |
1215 | goto error; | |
d6569377 | 1216 | |
850c2a4d | 1217 | if (acts) { |
ff27161e | 1218 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1219 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1220 | ufid_flags); | |
6740b721 JR |
1221 | if (IS_ERR(reply)) { |
1222 | error = PTR_ERR(reply); | |
1223 | goto err_kfree_acts; | |
90b8c2f7 | 1224 | } |
0c9fd022 JR |
1225 | } |
1226 | ||
1227 | ovs_lock(); | |
a94ebc39 | 1228 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1229 | if (unlikely(!dp)) { |
1230 | error = -ENODEV; | |
0c9fd022 | 1231 | goto err_unlock_ovs; |
6740b721 | 1232 | } |
0c9fd022 | 1233 | /* Check that the flow exists. */ |
bc619e29 JS |
1234 | if (ufid_present) |
1235 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1236 | else | |
1237 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1238 | if (unlikely(!flow)) { |
1239 | error = -ENOENT; | |
0c9fd022 | 1240 | goto err_unlock_ovs; |
6740b721 | 1241 | } |
3440e4bc | 1242 | |
0c9fd022 | 1243 | /* Update actions, if present. */ |
6740b721 | 1244 | if (likely(acts)) { |
0c9fd022 JR |
1245 | old_acts = ovsl_dereference(flow->sf_acts); |
1246 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1247 | |
1248 | if (unlikely(reply)) { | |
2c622e5a | 1249 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1250 | ovs_header->dp_ifindex, |
1251 | reply, info->snd_portid, | |
1252 | info->snd_seq, 0, | |
229486c2 | 1253 | OVS_FLOW_CMD_SET, |
bc619e29 | 1254 | ufid_flags); |
6740b721 JR |
1255 | BUG_ON(error < 0); |
1256 | } | |
1257 | } else { | |
1258 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1259 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
229486c2 | 1260 | info, OVS_FLOW_CMD_SET, false, |
bc619e29 JS |
1261 | ufid_flags); |
1262 | ||
6740b721 JR |
1263 | if (unlikely(IS_ERR(reply))) { |
1264 | error = PTR_ERR(reply); | |
1265 | goto err_unlock_ovs; | |
1266 | } | |
9c52546b | 1267 | } |
0c9fd022 | 1268 | |
0c9fd022 JR |
1269 | /* Clear stats. */ |
1270 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1271 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1272 | ovs_unlock(); |
37a1300c | 1273 | |
6740b721 | 1274 | if (reply) |
cb25142c | 1275 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 | 1276 | if (old_acts) |
e23775f2 | 1277 | ovs_nla_free_flow_actions_rcu(old_acts); |
7d16c847 | 1278 | |
d6569377 | 1279 | return 0; |
704a1e09 | 1280 | |
cd2a59e9 PS |
1281 | err_unlock_ovs: |
1282 | ovs_unlock(); | |
6740b721 JR |
1283 | kfree_skb(reply); |
1284 | err_kfree_acts: | |
e23775f2 | 1285 | ovs_nla_free_flow_actions(acts); |
37a1300c | 1286 | error: |
9c52546b | 1287 | return error; |
704a1e09 BP |
1288 | } |
1289 | ||
df2c07f4 | 1290 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1291 | { |
37a1300c | 1292 | struct nlattr **a = info->attrs; |
df2c07f4 | 1293 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1294 | struct net *net = sock_net(skb->sk); |
37a1300c | 1295 | struct sw_flow_key key; |
37a1300c | 1296 | struct sk_buff *reply; |
704a1e09 | 1297 | struct sw_flow *flow; |
9c52546b | 1298 | struct datapath *dp; |
a1c564be | 1299 | struct sw_flow_match match; |
bc619e29 JS |
1300 | struct sw_flow_id ufid; |
1301 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1302 | int err = 0; | |
9233cef7 | 1303 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1304 | bool ufid_present; |
704a1e09 | 1305 | |
bc619e29 JS |
1306 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1307 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1308 | ovs_match_init(&match, &key, true, NULL); |
038e34ab | 1309 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
bc619e29 JS |
1310 | log); |
1311 | } else if (!ufid_present) { | |
9233cef7 JR |
1312 | OVS_NLERR(log, |
1313 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1314 | err = -EINVAL; |
1b936472 | 1315 | } |
37a1300c BP |
1316 | if (err) |
1317 | return err; | |
704a1e09 | 1318 | |
cd2a59e9 | 1319 | ovs_lock(); |
2a4999f3 | 1320 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1321 | if (!dp) { |
1322 | err = -ENODEV; | |
1323 | goto unlock; | |
1324 | } | |
704a1e09 | 1325 | |
bc619e29 JS |
1326 | if (ufid_present) |
1327 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1328 | else | |
1329 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1330 | if (!flow) { |
cd2a59e9 PS |
1331 | err = -ENOENT; |
1332 | goto unlock; | |
1333 | } | |
d6569377 | 1334 | |
7d16c847 | 1335 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
229486c2 | 1336 | OVS_FLOW_CMD_GET, true, ufid_flags); |
cd2a59e9 PS |
1337 | if (IS_ERR(reply)) { |
1338 | err = PTR_ERR(reply); | |
1339 | goto unlock; | |
1340 | } | |
36956a7d | 1341 | |
cd2a59e9 | 1342 | ovs_unlock(); |
37a1300c | 1343 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1344 | unlock: |
1345 | ovs_unlock(); | |
1346 | return err; | |
d6569377 | 1347 | } |
9c52546b | 1348 | |
df2c07f4 | 1349 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1350 | { |
37a1300c | 1351 | struct nlattr **a = info->attrs; |
df2c07f4 | 1352 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1353 | struct net *net = sock_net(skb->sk); |
37a1300c | 1354 | struct sw_flow_key key; |
37a1300c | 1355 | struct sk_buff *reply; |
bc619e29 | 1356 | struct sw_flow *flow = NULL; |
d6569377 | 1357 | struct datapath *dp; |
a1c564be | 1358 | struct sw_flow_match match; |
bc619e29 JS |
1359 | struct sw_flow_id ufid; |
1360 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1361 | int err; |
9233cef7 | 1362 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1363 | bool ufid_present; |
36956a7d | 1364 | |
bc619e29 JS |
1365 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1366 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1367 | ovs_match_init(&match, &key, true, NULL); |
038e34ab JS |
1368 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1369 | NULL, log); | |
cde7f3ba JR |
1370 | if (unlikely(err)) |
1371 | return err; | |
1372 | } | |
1373 | ||
cd2a59e9 | 1374 | ovs_lock(); |
2a4999f3 | 1375 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1376 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1377 | err = -ENODEV; |
1378 | goto unlock; | |
1379 | } | |
7d16c847 | 1380 | |
bc619e29 | 1381 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1382 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1383 | goto unlock; |
1384 | } | |
7d16c847 | 1385 | |
bc619e29 JS |
1386 | if (ufid_present) |
1387 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1388 | else | |
1389 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1390 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1391 | err = -ENOENT; |
1392 | goto unlock; | |
1393 | } | |
d6569377 | 1394 | |
994dc286 | 1395 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1396 | ovs_unlock(); |
37a1300c | 1397 | |
46051cf8 | 1398 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1399 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1400 | |
1401 | if (likely(reply)) { | |
fa764e8f | 1402 | if (!IS_ERR(reply)) { |
7d16c847 PS |
1403 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1404 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1405 | reply, info->snd_portid, |
1406 | info->snd_seq, 0, | |
bc619e29 JS |
1407 | OVS_FLOW_CMD_DEL, |
1408 | ufid_flags); | |
cde7f3ba | 1409 | rcu_read_unlock(); |
096043f4 PA |
1410 | if (WARN_ON_ONCE(err < 0)) { |
1411 | kfree_skb(reply); | |
1412 | goto out_free; | |
1413 | } | |
cb25142c | 1414 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1415 | } else { |
cb25142c PS |
1416 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1417 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1418 | ||
cde7f3ba | 1419 | } |
afad3556 | 1420 | } |
37a1300c | 1421 | |
096043f4 | 1422 | out_free: |
a1c564be | 1423 | ovs_flow_free(flow, true); |
37a1300c | 1424 | return 0; |
cd2a59e9 PS |
1425 | unlock: |
1426 | ovs_unlock(); | |
1427 | return err; | |
37a1300c BP |
1428 | } |
1429 | ||
df2c07f4 | 1430 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1431 | { |
bc619e29 | 1432 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1433 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1434 | struct table_instance *ti; |
37a1300c | 1435 | struct datapath *dp; |
bc619e29 JS |
1436 | u32 ufid_flags; |
1437 | int err; | |
1438 | ||
6db0f72d JB |
1439 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1440 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
bc619e29 JS |
1441 | if (err) |
1442 | return err; | |
1443 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1444 | |
f44ccce1 | 1445 | rcu_read_lock(); |
01ac0970 | 1446 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1447 | if (!dp) { |
f44ccce1 | 1448 | rcu_read_unlock(); |
37a1300c | 1449 | return -ENODEV; |
cd2a59e9 | 1450 | } |
37a1300c | 1451 | |
994dc286 | 1452 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1453 | for (;;) { |
37a1300c BP |
1454 | struct sw_flow *flow; |
1455 | u32 bucket, obj; | |
1456 | ||
1457 | bucket = cb->args[0]; | |
1458 | obj = cb->args[1]; | |
994dc286 | 1459 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1460 | if (!flow) |
37a1300c BP |
1461 | break; |
1462 | ||
2c622e5a | 1463 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1464 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1465 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
229486c2 | 1466 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
37a1300c BP |
1467 | break; |
1468 | ||
1469 | cb->args[0] = bucket; | |
1470 | cb->args[1] = obj; | |
1471 | } | |
f44ccce1 | 1472 | rcu_read_unlock(); |
37a1300c | 1473 | return skb->len; |
704a1e09 BP |
1474 | } |
1475 | ||
cb25142c PS |
1476 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1477 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1478 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1479 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1480 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1481 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1482 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1483 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1484 | }; |
1485 | ||
e515e66a | 1486 | static const struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1487 | { .cmd = OVS_FLOW_CMD_NEW, |
f1e9590e YHW |
1488 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1489 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1490 | #endif | |
a6a8674d | 1491 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1492 | #ifdef HAVE_GENL_OPS_POLICY |
37a1300c | 1493 | .policy = flow_policy, |
2ef0f1c2 | 1494 | #endif |
0c9fd022 | 1495 | .doit = ovs_flow_cmd_new |
37a1300c | 1496 | }, |
df2c07f4 | 1497 | { .cmd = OVS_FLOW_CMD_DEL, |
f1e9590e YHW |
1498 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1499 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1500 | #endif | |
a6a8674d | 1501 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1502 | #ifdef HAVE_GENL_OPS_POLICY |
37a1300c | 1503 | .policy = flow_policy, |
2ef0f1c2 | 1504 | #endif |
df2c07f4 | 1505 | .doit = ovs_flow_cmd_del |
37a1300c | 1506 | }, |
df2c07f4 | 1507 | { .cmd = OVS_FLOW_CMD_GET, |
f1e9590e YHW |
1508 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1509 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1510 | #endif | |
37a1300c | 1511 | .flags = 0, /* OK for unprivileged users. */ |
2ef0f1c2 | 1512 | #ifdef HAVE_GENL_OPS_POLICY |
37a1300c | 1513 | .policy = flow_policy, |
2ef0f1c2 | 1514 | #endif |
df2c07f4 JP |
1515 | .doit = ovs_flow_cmd_get, |
1516 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1517 | }, |
df2c07f4 | 1518 | { .cmd = OVS_FLOW_CMD_SET, |
f1e9590e YHW |
1519 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1520 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1521 | #endif | |
a6a8674d | 1522 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1523 | #ifdef HAVE_GENL_OPS_POLICY |
37a1300c | 1524 | .policy = flow_policy, |
2ef0f1c2 | 1525 | #endif |
0c9fd022 | 1526 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1527 | }, |
1528 | }; | |
1529 | ||
ba63fe26 | 1530 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
df2c07f4 | 1531 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1532 | .name = OVS_FLOW_FAMILY, |
1533 | .version = OVS_FLOW_VERSION, | |
1534 | .maxattr = OVS_FLOW_ATTR_MAX, | |
2ef0f1c2 JB |
1535 | #ifndef HAVE_GENL_OPS_POLICY |
1536 | .policy = flow_policy, | |
1537 | #endif | |
b3dcb73c | 1538 | .netnsok = true, |
cb25142c PS |
1539 | .parallel_ops = true, |
1540 | .ops = dp_flow_genl_ops, | |
1541 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1542 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1543 | .n_mcgrps = 1, | |
ba63fe26 | 1544 | .module = THIS_MODULE, |
aaff4b55 BP |
1545 | }; |
1546 | ||
0afa2373 TG |
1547 | static size_t ovs_dp_cmd_msg_size(void) |
1548 | { | |
1549 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1550 | ||
1551 | msgsize += nla_total_size(IFNAMSIZ); | |
91b37647 PS |
1552 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1553 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
300af20a | 1554 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1555 | |
1556 | return msgsize; | |
1557 | } | |
1558 | ||
d637497c | 1559 | /* Called with ovs_mutex. */ |
df2c07f4 | 1560 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1561 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1562 | { |
df2c07f4 | 1563 | struct ovs_header *ovs_header; |
e926dfe3 | 1564 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1565 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1566 | int err; |
1567 | ||
28aea917 | 1568 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1569 | flags, cmd); |
df2c07f4 | 1570 | if (!ovs_header) |
aaff4b55 | 1571 | goto error; |
064af421 | 1572 | |
b063d9f0 | 1573 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1574 | |
850b6b3b | 1575 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1576 | if (err) |
d6569377 | 1577 | goto nla_put_failure; |
064af421 | 1578 | |
4fa72a95 | 1579 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
91b37647 PS |
1580 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1581 | &dp_stats, OVS_DP_ATTR_PAD)) | |
4fa72a95 AZ |
1582 | goto nla_put_failure; |
1583 | ||
91b37647 PS |
1584 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1585 | sizeof(struct ovs_dp_megaflow_stats), | |
1586 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
c3cc8c03 | 1587 | goto nla_put_failure; |
d6569377 | 1588 | |
c58cc9a4 TG |
1589 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1590 | goto nla_put_failure; | |
1591 | ||
23b48dc1 TG |
1592 | genlmsg_end(skb, ovs_header); |
1593 | return 0; | |
d6569377 BP |
1594 | |
1595 | nla_put_failure: | |
df2c07f4 | 1596 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1597 | error: |
1598 | return -EMSGSIZE; | |
d6569377 BP |
1599 | } |
1600 | ||
40c08cda | 1601 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
d6569377 | 1602 | { |
40c08cda | 1603 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
aaff4b55 | 1604 | } |
9dca7bd5 | 1605 | |
aa917006 | 1606 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1607 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1608 | const struct ovs_header *ovs_header, |
6455100f | 1609 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1610 | { |
254f2dc8 BP |
1611 | struct datapath *dp; |
1612 | ||
df2c07f4 | 1613 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1614 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1615 | else { |
d6569377 | 1616 | struct vport *vport; |
d6569377 | 1617 | |
2a4999f3 | 1618 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1619 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1620 | } |
254f2dc8 | 1621 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1622 | } |
1623 | ||
94358dcf TG |
1624 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1625 | { | |
1626 | struct datapath *dp; | |
1627 | ||
1628 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1629 | if (IS_ERR(dp)) |
94358dcf TG |
1630 | return; |
1631 | ||
1632 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1633 | dp->user_features = 0; | |
1634 | } | |
1635 | ||
dca96842 PB |
1636 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1637 | ||
1638 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
c58cc9a4 | 1639 | { |
dca96842 PB |
1640 | u32 user_features = 0; |
1641 | ||
1642 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1643 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1644 | ||
1645 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1646 | OVS_DP_F_UNALIGNED | | |
1647 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1648 | return -EOPNOTSUPP; | |
1649 | ||
1650 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1651 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1652 | return -EOPNOTSUPP; | |
1653 | #endif | |
1654 | } | |
1655 | ||
1656 | dp->user_features = user_features; | |
1657 | ||
1658 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1659 | static_branch_enable(&tc_recirc_sharing_support); | |
1660 | else | |
1661 | static_branch_disable(&tc_recirc_sharing_support); | |
1662 | ||
1663 | return 0; | |
c58cc9a4 TG |
1664 | } |
1665 | ||
a3839b26 TZ |
1666 | static int ovs_dp_stats_init(struct datapath *dp) |
1667 | { | |
1668 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1669 | if (!dp->stats_percpu) | |
1670 | return -ENOMEM; | |
1671 | ||
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | static int ovs_dp_vport_init(struct datapath *dp) | |
1676 | { | |
1677 | int i; | |
1678 | ||
1679 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1680 | sizeof(struct hlist_head), | |
1681 | GFP_KERNEL); | |
1682 | if (!dp->ports) | |
1683 | return -ENOMEM; | |
1684 | ||
1685 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1686 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
df2c07f4 | 1691 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1692 | { |
aaff4b55 | 1693 | struct nlattr **a = info->attrs; |
d6569377 | 1694 | struct vport_parms parms; |
aaff4b55 | 1695 | struct sk_buff *reply; |
d6569377 BP |
1696 | struct datapath *dp; |
1697 | struct vport *vport; | |
2a4999f3 | 1698 | struct ovs_net *ovs_net; |
a3839b26 | 1699 | int err; |
d6569377 | 1700 | |
d6569377 | 1701 | err = -EINVAL; |
ea36840f | 1702 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1703 | goto err; |
1704 | ||
40c08cda | 1705 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1706 | if (!reply) |
1707 | return -ENOMEM; | |
d6569377 | 1708 | |
d6569377 BP |
1709 | err = -ENOMEM; |
1710 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1711 | if (dp == NULL) | |
a3839b26 | 1712 | goto err_destroy_reply; |
2a4999f3 | 1713 | |
c0cddcec | 1714 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
0ceaa66c | 1715 | |
d6569377 | 1716 | /* Allocate table. */ |
994dc286 PS |
1717 | err = ovs_flow_tbl_init(&dp->table); |
1718 | if (err) | |
a3839b26 | 1719 | goto err_destroy_dp; |
d6569377 | 1720 | |
a3839b26 TZ |
1721 | err = ovs_dp_stats_init(dp); |
1722 | if (err) | |
99769a40 | 1723 | goto err_destroy_table; |
99769a40 | 1724 | |
a3839b26 TZ |
1725 | err = ovs_dp_vport_init(dp); |
1726 | if (err) | |
1727 | goto err_destroy_stats; | |
95b1d73a | 1728 | |
1cb57039 AZ |
1729 | err = ovs_meters_init(dp); |
1730 | if (err) | |
a3839b26 | 1731 | goto err_destroy_ports; |
1cb57039 | 1732 | |
d6569377 | 1733 | /* Set up our datapath device. */ |
df2c07f4 JP |
1734 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1735 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1736 | parms.options = NULL; |
1737 | parms.dp = dp; | |
df2c07f4 | 1738 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1739 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1740 | |
dca96842 PB |
1741 | err = ovs_dp_change(dp, a); |
1742 | if (err) | |
1743 | goto err_destroy_meters; | |
c58cc9a4 | 1744 | |
d81eef1b JR |
1745 | /* So far only local changes have been made, now need the lock. */ |
1746 | ovs_lock(); | |
1747 | ||
d6569377 BP |
1748 | vport = new_vport(&parms); |
1749 | if (IS_ERR(vport)) { | |
1750 | err = PTR_ERR(vport); | |
1751 | if (err == -EBUSY) | |
1752 | err = -EEXIST; | |
1753 | ||
94358dcf TG |
1754 | if (err == -EEXIST) { |
1755 | /* An outdated user space instance that does not understand | |
1756 | * the concept of user_features has attempted to create a new | |
1757 | * datapath and is likely to reuse it. Drop all user features. | |
1758 | */ | |
1759 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1760 | ovs_dp_reset_user_features(skb, info); | |
1761 | } | |
1762 | ||
c07157ca | 1763 | ovs_unlock(); |
1cb57039 | 1764 | goto err_destroy_meters; |
d6569377 | 1765 | } |
d6569377 | 1766 | |
d81eef1b JR |
1767 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1768 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1769 | BUG_ON(err < 0); | |
aaff4b55 | 1770 | |
2a4999f3 | 1771 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1772 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
a0fb56c1 | 1773 | |
cd2a59e9 | 1774 | ovs_unlock(); |
d6569377 | 1775 | |
cb25142c | 1776 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1777 | return 0; |
1778 | ||
1cb57039 | 1779 | err_destroy_meters: |
1cb57039 | 1780 | ovs_meters_exit(dp); |
a3839b26 | 1781 | err_destroy_ports: |
95b1d73a | 1782 | kfree(dp->ports); |
a3839b26 | 1783 | err_destroy_stats: |
99769a40 | 1784 | free_percpu(dp->stats_percpu); |
d6569377 | 1785 | err_destroy_table: |
e379e4d1 | 1786 | ovs_flow_tbl_destroy(&dp->table); |
a3839b26 | 1787 | err_destroy_dp: |
d6569377 | 1788 | kfree(dp); |
a3839b26 | 1789 | err_destroy_reply: |
d81eef1b | 1790 | kfree_skb(reply); |
d6569377 | 1791 | err: |
064af421 BP |
1792 | return err; |
1793 | } | |
1794 | ||
cd2a59e9 | 1795 | /* Called with ovs_mutex. */ |
2a4999f3 | 1796 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1797 | { |
95b1d73a | 1798 | int i; |
44e05eca | 1799 | |
95b1d73a PS |
1800 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1801 | struct vport *vport; | |
f8dfbcb7 | 1802 | struct hlist_node *n; |
95b1d73a | 1803 | |
f8dfbcb7 | 1804 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1805 | if (vport->port_no != OVSP_LOCAL) |
1806 | ovs_dp_detach_port(vport); | |
1807 | } | |
ed099e92 | 1808 | |
fb93e9aa | 1809 | list_del_rcu(&dp->list_node); |
ed099e92 | 1810 | |
cd2a59e9 | 1811 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1812 | * all ports in datapath are destroyed first before freeing datapath. |
1813 | */ | |
cd2a59e9 | 1814 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1815 | |
d103f479 | 1816 | /* RCU destroy the flow table */ |
ed099e92 | 1817 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1818 | } |
1819 | ||
1820 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1821 | { | |
1822 | struct sk_buff *reply; | |
1823 | struct datapath *dp; | |
1824 | int err; | |
1825 | ||
40c08cda | 1826 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1827 | if (!reply) |
1828 | return -ENOMEM; | |
1829 | ||
cd2a59e9 | 1830 | ovs_lock(); |
2a4999f3 PS |
1831 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1832 | err = PTR_ERR(dp); | |
1833 | if (IS_ERR(dp)) | |
d81eef1b | 1834 | goto err_unlock_free; |
2a4999f3 | 1835 | |
d81eef1b JR |
1836 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1837 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1838 | BUG_ON(err < 0); | |
2a4999f3 PS |
1839 | |
1840 | __dp_destroy(dp); | |
d81eef1b | 1841 | ovs_unlock(); |
7d16c847 | 1842 | |
cb25142c | 1843 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1844 | return 0; |
d81eef1b JR |
1845 | |
1846 | err_unlock_free: | |
cd2a59e9 | 1847 | ovs_unlock(); |
d81eef1b | 1848 | kfree_skb(reply); |
cd2a59e9 | 1849 | return err; |
44e05eca BP |
1850 | } |
1851 | ||
df2c07f4 | 1852 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1853 | { |
aaff4b55 | 1854 | struct sk_buff *reply; |
d6569377 | 1855 | struct datapath *dp; |
d6569377 | 1856 | int err; |
064af421 | 1857 | |
40c08cda | 1858 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1859 | if (!reply) |
1860 | return -ENOMEM; | |
1861 | ||
cd2a59e9 | 1862 | ovs_lock(); |
2a4999f3 | 1863 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1864 | err = PTR_ERR(dp); |
d6569377 | 1865 | if (IS_ERR(dp)) |
d81eef1b | 1866 | goto err_unlock_free; |
38c6ecbc | 1867 | |
dca96842 PB |
1868 | err = ovs_dp_change(dp, info->attrs); |
1869 | if (err) | |
1870 | goto err_unlock_free; | |
c58cc9a4 | 1871 | |
d81eef1b | 1872 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
229486c2 | 1873 | info->snd_seq, 0, OVS_DP_CMD_GET); |
d81eef1b | 1874 | BUG_ON(err < 0); |
a0fb56c1 | 1875 | |
cd2a59e9 | 1876 | ovs_unlock(); |
7d16c847 | 1877 | |
cb25142c | 1878 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1879 | return 0; |
d81eef1b JR |
1880 | |
1881 | err_unlock_free: | |
cd2a59e9 | 1882 | ovs_unlock(); |
d81eef1b | 1883 | kfree_skb(reply); |
cd2a59e9 | 1884 | return err; |
064af421 BP |
1885 | } |
1886 | ||
df2c07f4 | 1887 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1888 | { |
aaff4b55 | 1889 | struct sk_buff *reply; |
d6569377 | 1890 | struct datapath *dp; |
d6569377 | 1891 | int err; |
1dcf111b | 1892 | |
40c08cda | 1893 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1894 | if (!reply) |
1895 | return -ENOMEM; | |
1896 | ||
d637497c | 1897 | ovs_lock(); |
2a4999f3 | 1898 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1899 | if (IS_ERR(dp)) { |
1900 | err = PTR_ERR(dp); | |
d81eef1b | 1901 | goto err_unlock_free; |
cd2a59e9 | 1902 | } |
d81eef1b | 1903 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
229486c2 | 1904 | info->snd_seq, 0, OVS_DP_CMD_GET); |
d81eef1b | 1905 | BUG_ON(err < 0); |
d637497c | 1906 | ovs_unlock(); |
aaff4b55 BP |
1907 | |
1908 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1909 | |
d81eef1b | 1910 | err_unlock_free: |
d637497c | 1911 | ovs_unlock(); |
d81eef1b | 1912 | kfree_skb(reply); |
cd2a59e9 | 1913 | return err; |
1dcf111b JP |
1914 | } |
1915 | ||
df2c07f4 | 1916 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1917 | { |
2a4999f3 | 1918 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1919 | struct datapath *dp; |
1920 | int skip = cb->args[0]; | |
1921 | int i = 0; | |
a7786963 | 1922 | |
d637497c PS |
1923 | ovs_lock(); |
1924 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1925 | if (i >= skip && |
28aea917 | 1926 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1927 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
229486c2 | 1928 | OVS_DP_CMD_GET) < 0) |
aaff4b55 | 1929 | break; |
254f2dc8 | 1930 | i++; |
a7786963 | 1931 | } |
d637497c | 1932 | ovs_unlock(); |
aaff4b55 | 1933 | |
254f2dc8 BP |
1934 | cb->args[0] = i; |
1935 | ||
aaff4b55 | 1936 | return skb->len; |
c19e6535 BP |
1937 | } |
1938 | ||
cb25142c PS |
1939 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1940 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1941 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1942 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1943 | }; | |
1944 | ||
e515e66a | 1945 | static const struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1946 | { .cmd = OVS_DP_CMD_NEW, |
f1e9590e YHW |
1947 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1948 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1949 | #endif | |
a6a8674d | 1950 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1951 | #ifdef HAVE_GENL_OPS_POLICY |
aaff4b55 | 1952 | .policy = datapath_policy, |
2ef0f1c2 | 1953 | #endif |
df2c07f4 | 1954 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1955 | }, |
df2c07f4 | 1956 | { .cmd = OVS_DP_CMD_DEL, |
f1e9590e YHW |
1957 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1958 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1959 | #endif | |
a6a8674d | 1960 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1961 | #ifdef HAVE_GENL_OPS_POLICY |
aaff4b55 | 1962 | .policy = datapath_policy, |
2ef0f1c2 | 1963 | #endif |
df2c07f4 | 1964 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1965 | }, |
df2c07f4 | 1966 | { .cmd = OVS_DP_CMD_GET, |
f1e9590e YHW |
1967 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1968 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1969 | #endif | |
aaff4b55 | 1970 | .flags = 0, /* OK for unprivileged users. */ |
2ef0f1c2 | 1971 | #ifdef HAVE_GENL_OPS_POLICY |
aaff4b55 | 1972 | .policy = datapath_policy, |
2ef0f1c2 | 1973 | #endif |
df2c07f4 JP |
1974 | .doit = ovs_dp_cmd_get, |
1975 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1976 | }, |
df2c07f4 | 1977 | { .cmd = OVS_DP_CMD_SET, |
f1e9590e YHW |
1978 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
1979 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
1980 | #endif | |
a6a8674d | 1981 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 1982 | #ifdef HAVE_GENL_OPS_POLICY |
aaff4b55 | 1983 | .policy = datapath_policy, |
2ef0f1c2 | 1984 | #endif |
df2c07f4 | 1985 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1986 | }, |
1987 | }; | |
1988 | ||
ba63fe26 | 1989 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
df2c07f4 | 1990 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1991 | .name = OVS_DATAPATH_FAMILY, |
1992 | .version = OVS_DATAPATH_VERSION, | |
1993 | .maxattr = OVS_DP_ATTR_MAX, | |
2ef0f1c2 JB |
1994 | #ifndef HAVE_GENL_OPS_POLICY |
1995 | .policy = datapath_policy, | |
1996 | #endif | |
b3dcb73c | 1997 | .netnsok = true, |
cb25142c PS |
1998 | .parallel_ops = true, |
1999 | .ops = dp_datapath_genl_ops, | |
2000 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
2001 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
2002 | .n_mcgrps = 1, | |
ba63fe26 | 2003 | .module = THIS_MODULE, |
f0fef760 BP |
2004 | }; |
2005 | ||
cd2a59e9 | 2006 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 2007 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
b147f2e9 | 2008 | struct net *net, u32 portid, u32 seq, |
b7465cac | 2009 | u32 flags, u8 cmd, gfp_t gfp) |
064af421 | 2010 | { |
df2c07f4 | 2011 | struct ovs_header *ovs_header; |
e926dfe3 | 2012 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
2013 | int err; |
2014 | ||
28aea917 | 2015 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 2016 | flags, cmd); |
df2c07f4 | 2017 | if (!ovs_header) |
f0fef760 | 2018 | return -EMSGSIZE; |
c19e6535 | 2019 | |
99769a40 | 2020 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 2021 | |
c3cc8c03 DM |
2022 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
2023 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
e23775f2 | 2024 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
b147f2e9 JB |
2025 | ovs_vport_name(vport)) || |
2026 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
c3cc8c03 | 2027 | goto nla_put_failure; |
c19e6535 | 2028 | |
b147f2e9 JB |
2029 | #ifdef HAVE_PEERNET2ID_ALLOC |
2030 | if (!net_eq(net, dev_net(vport->dev))) { | |
b7465cac | 2031 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
b147f2e9 JB |
2032 | |
2033 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
2034 | goto nla_put_failure; | |
2035 | } | |
2036 | ||
2037 | #endif | |
850b6b3b | 2038 | ovs_vport_get_stats(vport, &vport_stats); |
91b37647 PS |
2039 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
2040 | sizeof(struct ovs_vport_stats), &vport_stats, | |
2041 | OVS_VPORT_ATTR_PAD)) | |
c3cc8c03 | 2042 | goto nla_put_failure; |
c19e6535 | 2043 | |
beb1c69a AW |
2044 | if (ovs_vport_get_upcall_portids(vport, skb)) |
2045 | goto nla_put_failure; | |
2046 | ||
850b6b3b | 2047 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
2048 | if (err == -EMSGSIZE) |
2049 | goto error; | |
c19e6535 | 2050 | |
23b48dc1 TG |
2051 | genlmsg_end(skb, ovs_header); |
2052 | return 0; | |
c19e6535 BP |
2053 | |
2054 | nla_put_failure: | |
2055 | err = -EMSGSIZE; | |
f0fef760 | 2056 | error: |
df2c07f4 | 2057 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 2058 | return err; |
064af421 BP |
2059 | } |
2060 | ||
d81eef1b JR |
2061 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
2062 | { | |
2063 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2064 | } | |
2065 | ||
2066 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
b147f2e9 JB |
2067 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
2068 | u32 portid, u32 seq, u8 cmd) | |
064af421 | 2069 | { |
c19e6535 | 2070 | struct sk_buff *skb; |
f0fef760 | 2071 | int retval; |
c19e6535 | 2072 | |
b7465cac | 2073 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
c19e6535 BP |
2074 | if (!skb) |
2075 | return ERR_PTR(-ENOMEM); | |
2076 | ||
b7465cac GN |
2077 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
2078 | GFP_KERNEL); | |
c25ea534 JG |
2079 | BUG_ON(retval < 0); |
2080 | ||
c19e6535 | 2081 | return skb; |
f0fef760 | 2082 | } |
c19e6535 | 2083 | |
cd2a59e9 | 2084 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 2085 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 2086 | const struct ovs_header *ovs_header, |
df2c07f4 | 2087 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
2088 | { |
2089 | struct datapath *dp; | |
2090 | struct vport *vport; | |
2091 | ||
b147f2e9 JB |
2092 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2093 | return ERR_PTR(-EOPNOTSUPP); | |
df2c07f4 | 2094 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 2095 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 2096 | if (!vport) |
c19e6535 | 2097 | return ERR_PTR(-ENODEV); |
24ce832d BP |
2098 | if (ovs_header->dp_ifindex && |
2099 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2100 | return ERR_PTR(-ENODEV); | |
c19e6535 | 2101 | return vport; |
df2c07f4 JP |
2102 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
2103 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
2104 | |
2105 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 2106 | return ERR_PTR(-EFBIG); |
c19e6535 | 2107 | |
2a4999f3 | 2108 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
2109 | if (!dp) |
2110 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 2111 | |
cd2a59e9 | 2112 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 2113 | if (!vport) |
17535c57 | 2114 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
2115 | return vport; |
2116 | } else | |
2117 | return ERR_PTR(-EINVAL); | |
b147f2e9 | 2118 | |
064af421 BP |
2119 | } |
2120 | ||
ec335e0b | 2121 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
8ce37339 | 2122 | { |
ec335e0b | 2123 | unsigned int dev_headroom, max_headroom = 0; |
8ce37339 PS |
2124 | struct net_device *dev; |
2125 | struct vport *vport; | |
2126 | int i; | |
2127 | ||
2128 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2129 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
2130 | dev = vport->dev; | |
2131 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2132 | if (dev_headroom > max_headroom) | |
2133 | max_headroom = dev_headroom; | |
2134 | } | |
2135 | } | |
2136 | ||
ec335e0b TY |
2137 | return max_headroom; |
2138 | } | |
2139 | ||
2140 | /* Called with ovs_mutex */ | |
2141 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2142 | { | |
2143 | struct vport *vport; | |
2144 | int i; | |
2145 | ||
2146 | dp->max_headroom = new_headroom; | |
8ce37339 PS |
2147 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) |
2148 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
ec335e0b | 2149 | netdev_set_rx_headroom(vport->dev, new_headroom); |
8ce37339 PS |
2150 | } |
2151 | ||
df2c07f4 | 2152 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 2153 | { |
f0fef760 | 2154 | struct nlattr **a = info->attrs; |
df2c07f4 | 2155 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 2156 | struct vport_parms parms; |
ed099e92 | 2157 | struct sk_buff *reply; |
c19e6535 | 2158 | struct vport *vport; |
c19e6535 | 2159 | struct datapath *dp; |
ec335e0b | 2160 | unsigned int new_headroom; |
b0ec0f27 | 2161 | u32 port_no; |
c19e6535 | 2162 | int err; |
b0ec0f27 | 2163 | |
ea36840f BP |
2164 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2165 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b | 2166 | return -EINVAL; |
b147f2e9 JB |
2167 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2168 | return -EOPNOTSUPP; | |
d81eef1b JR |
2169 | |
2170 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2171 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2172 | if (port_no >= DP_MAX_PORTS) | |
2173 | return -EFBIG; | |
2174 | ||
2175 | reply = ovs_vport_cmd_alloc_info(); | |
2176 | if (!reply) | |
2177 | return -ENOMEM; | |
f0fef760 | 2178 | |
cd2a59e9 | 2179 | ovs_lock(); |
5a38795f | 2180 | restart: |
2a4999f3 | 2181 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
2182 | err = -ENODEV; |
2183 | if (!dp) | |
d81eef1b | 2184 | goto exit_unlock_free; |
c19e6535 | 2185 | |
d81eef1b | 2186 | if (port_no) { |
cd2a59e9 | 2187 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2188 | err = -EBUSY; |
2189 | if (vport) | |
d81eef1b | 2190 | goto exit_unlock_free; |
c19e6535 BP |
2191 | } else { |
2192 | for (port_no = 1; ; port_no++) { | |
2193 | if (port_no >= DP_MAX_PORTS) { | |
2194 | err = -EFBIG; | |
d81eef1b | 2195 | goto exit_unlock_free; |
c19e6535 | 2196 | } |
cd2a59e9 | 2197 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2198 | if (!vport) |
2199 | break; | |
51d4d598 | 2200 | } |
064af421 | 2201 | } |
b0ec0f27 | 2202 | |
df2c07f4 JP |
2203 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2204 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2205 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2206 | parms.dp = dp; |
2207 | parms.port_no = port_no; | |
beb1c69a | 2208 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
2209 | |
2210 | vport = new_vport(&parms); | |
2211 | err = PTR_ERR(vport); | |
5a38795f TG |
2212 | if (IS_ERR(vport)) { |
2213 | if (err == -EAGAIN) | |
2214 | goto restart; | |
d81eef1b | 2215 | goto exit_unlock_free; |
5a38795f | 2216 | } |
c19e6535 | 2217 | |
b147f2e9 JB |
2218 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2219 | info->snd_portid, info->snd_seq, 0, | |
b7465cac | 2220 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
d81eef1b | 2221 | BUG_ON(err < 0); |
8ce37339 | 2222 | |
ec335e0b TY |
2223 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2224 | ||
2225 | if (new_headroom > dp->max_headroom) | |
2226 | ovs_update_headroom(dp, new_headroom); | |
8ce37339 PS |
2227 | else |
2228 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2229 | ||
d81eef1b | 2230 | ovs_unlock(); |
e297c6b7 | 2231 | |
cb25142c | 2232 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2233 | return 0; |
c19e6535 | 2234 | |
d81eef1b | 2235 | exit_unlock_free: |
cd2a59e9 | 2236 | ovs_unlock(); |
d81eef1b | 2237 | kfree_skb(reply); |
c19e6535 | 2238 | return err; |
44e05eca BP |
2239 | } |
2240 | ||
df2c07f4 | 2241 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2242 | { |
f0fef760 BP |
2243 | struct nlattr **a = info->attrs; |
2244 | struct sk_buff *reply; | |
c19e6535 | 2245 | struct vport *vport; |
c19e6535 | 2246 | int err; |
44e05eca | 2247 | |
d81eef1b JR |
2248 | reply = ovs_vport_cmd_alloc_info(); |
2249 | if (!reply) | |
2250 | return -ENOMEM; | |
2251 | ||
cd2a59e9 | 2252 | ovs_lock(); |
2a4999f3 | 2253 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2254 | err = PTR_ERR(vport); |
2255 | if (IS_ERR(vport)) | |
d81eef1b | 2256 | goto exit_unlock_free; |
44e05eca | 2257 | |
6455100f | 2258 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2259 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2260 | err = -EINVAL; |
d81eef1b | 2261 | goto exit_unlock_free; |
c25ea534 JG |
2262 | } |
2263 | ||
17ec1d04 | 2264 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2265 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 2266 | if (err) |
d81eef1b | 2267 | goto exit_unlock_free; |
17ec1d04 | 2268 | } |
1fc7083d | 2269 | |
beb1c69a | 2270 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
2271 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
2272 | ||
2273 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
2274 | if (err) |
2275 | goto exit_unlock_free; | |
2276 | } | |
c19e6535 | 2277 | |
b147f2e9 JB |
2278 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2279 | info->snd_portid, info->snd_seq, 0, | |
b7465cac | 2280 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
c25ea534 | 2281 | BUG_ON(err < 0); |
cd2a59e9 | 2282 | ovs_unlock(); |
d81eef1b | 2283 | |
cb25142c | 2284 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2285 | return 0; |
2286 | ||
d81eef1b | 2287 | exit_unlock_free: |
cd2a59e9 | 2288 | ovs_unlock(); |
d81eef1b | 2289 | kfree_skb(reply); |
c19e6535 | 2290 | return err; |
064af421 BP |
2291 | } |
2292 | ||
df2c07f4 | 2293 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2294 | { |
ec335e0b | 2295 | bool update_headroom = false; |
f0fef760 BP |
2296 | struct nlattr **a = info->attrs; |
2297 | struct sk_buff *reply; | |
8ce37339 | 2298 | struct datapath *dp; |
c19e6535 | 2299 | struct vport *vport; |
ec335e0b | 2300 | unsigned int new_headroom; |
c19e6535 BP |
2301 | int err; |
2302 | ||
d81eef1b JR |
2303 | reply = ovs_vport_cmd_alloc_info(); |
2304 | if (!reply) | |
2305 | return -ENOMEM; | |
2306 | ||
cd2a59e9 | 2307 | ovs_lock(); |
2a4999f3 | 2308 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2309 | err = PTR_ERR(vport); |
f0fef760 | 2310 | if (IS_ERR(vport)) |
d81eef1b | 2311 | goto exit_unlock_free; |
c19e6535 | 2312 | |
df2c07f4 | 2313 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2314 | err = -EINVAL; |
d81eef1b | 2315 | goto exit_unlock_free; |
f0fef760 BP |
2316 | } |
2317 | ||
b147f2e9 JB |
2318 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2319 | info->snd_portid, info->snd_seq, 0, | |
b7465cac | 2320 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
d81eef1b | 2321 | BUG_ON(err < 0); |
8ce37339 PS |
2322 | |
2323 | /* the vport deletion may trigger dp headroom update */ | |
2324 | dp = vport->dp; | |
2325 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
ec335e0b TY |
2326 | update_headroom = true; |
2327 | ||
8ce37339 | 2328 | netdev_reset_rx_headroom(vport->dev); |
850b6b3b | 2329 | ovs_dp_detach_port(vport); |
8ce37339 | 2330 | |
ec335e0b TY |
2331 | if (update_headroom) { |
2332 | new_headroom = ovs_get_max_headroom(dp); | |
8ce37339 | 2333 | |
ec335e0b TY |
2334 | if (new_headroom < dp->max_headroom) |
2335 | ovs_update_headroom(dp, new_headroom); | |
2336 | } | |
d81eef1b | 2337 | ovs_unlock(); |
f0fef760 | 2338 | |
cb25142c | 2339 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2340 | return 0; |
f0fef760 | 2341 | |
d81eef1b | 2342 | exit_unlock_free: |
cd2a59e9 | 2343 | ovs_unlock(); |
d81eef1b | 2344 | kfree_skb(reply); |
c19e6535 | 2345 | return err; |
7c40efc9 BP |
2346 | } |
2347 | ||
df2c07f4 | 2348 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2349 | { |
f0fef760 | 2350 | struct nlattr **a = info->attrs; |
df2c07f4 | 2351 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2352 | struct sk_buff *reply; |
c19e6535 | 2353 | struct vport *vport; |
c19e6535 BP |
2354 | int err; |
2355 | ||
d81eef1b JR |
2356 | reply = ovs_vport_cmd_alloc_info(); |
2357 | if (!reply) | |
2358 | return -ENOMEM; | |
2359 | ||
ed099e92 | 2360 | rcu_read_lock(); |
2a4999f3 | 2361 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2362 | err = PTR_ERR(vport); |
2363 | if (IS_ERR(vport)) | |
d81eef1b | 2364 | goto exit_unlock_free; |
b147f2e9 JB |
2365 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2366 | info->snd_portid, info->snd_seq, 0, | |
b7465cac | 2367 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
d81eef1b | 2368 | BUG_ON(err < 0); |
df2fa9b5 JG |
2369 | rcu_read_unlock(); |
2370 | ||
2371 | return genlmsg_reply(reply, info); | |
ed099e92 | 2372 | |
d81eef1b | 2373 | exit_unlock_free: |
ed099e92 | 2374 | rcu_read_unlock(); |
d81eef1b | 2375 | kfree_skb(reply); |
c19e6535 BP |
2376 | return err; |
2377 | } | |
2378 | ||
df2c07f4 | 2379 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2380 | { |
df2c07f4 | 2381 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2382 | struct datapath *dp; |
95b1d73a PS |
2383 | int bucket = cb->args[0], skip = cb->args[1]; |
2384 | int i, j = 0; | |
c19e6535 | 2385 | |
03fc2881 | 2386 | rcu_read_lock(); |
01ac0970 | 2387 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2388 | if (!dp) { |
2389 | rcu_read_unlock(); | |
f0fef760 | 2390 | return -ENODEV; |
03fc2881 | 2391 | } |
95b1d73a | 2392 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2393 | struct vport *vport; |
95b1d73a PS |
2394 | |
2395 | j = 0; | |
f8dfbcb7 | 2396 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2397 | if (j >= skip && |
2398 | ovs_vport_cmd_fill_info(vport, skb, | |
b147f2e9 | 2399 | sock_net(skb->sk), |
28aea917 | 2400 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2401 | cb->nlh->nlmsg_seq, |
2402 | NLM_F_MULTI, | |
b7465cac GN |
2403 | OVS_VPORT_CMD_GET, |
2404 | GFP_ATOMIC) < 0) | |
95b1d73a PS |
2405 | goto out; |
2406 | ||
2407 | j++; | |
2408 | } | |
2409 | skip = 0; | |
c19e6535 | 2410 | } |
95b1d73a | 2411 | out: |
ed099e92 | 2412 | rcu_read_unlock(); |
c19e6535 | 2413 | |
95b1d73a PS |
2414 | cb->args[0] = i; |
2415 | cb->args[1] = j; | |
f0fef760 | 2416 | |
95b1d73a | 2417 | return skb->len; |
7c40efc9 BP |
2418 | } |
2419 | ||
cb25142c PS |
2420 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2421 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2422 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2423 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2424 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
8fc8986d | 2425 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
cb25142c | 2426 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
b147f2e9 JB |
2427 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2428 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
cb25142c PS |
2429 | }; |
2430 | ||
e515e66a | 2431 | static const struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2432 | { .cmd = OVS_VPORT_CMD_NEW, |
f1e9590e YHW |
2433 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
2434 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2435 | #endif | |
a6a8674d | 2436 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 2437 | #ifdef HAVE_GENL_OPS_POLICY |
f0fef760 | 2438 | .policy = vport_policy, |
2ef0f1c2 | 2439 | #endif |
df2c07f4 | 2440 | .doit = ovs_vport_cmd_new |
f0fef760 | 2441 | }, |
df2c07f4 | 2442 | { .cmd = OVS_VPORT_CMD_DEL, |
f1e9590e YHW |
2443 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
2444 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2445 | #endif | |
a6a8674d | 2446 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 2447 | #ifdef HAVE_GENL_OPS_POLICY |
f0fef760 | 2448 | .policy = vport_policy, |
2ef0f1c2 | 2449 | #endif |
df2c07f4 | 2450 | .doit = ovs_vport_cmd_del |
f0fef760 | 2451 | }, |
df2c07f4 | 2452 | { .cmd = OVS_VPORT_CMD_GET, |
f1e9590e YHW |
2453 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
2454 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2455 | #endif | |
f0fef760 | 2456 | .flags = 0, /* OK for unprivileged users. */ |
2ef0f1c2 | 2457 | #ifdef HAVE_GENL_OPS_POLICY |
f0fef760 | 2458 | .policy = vport_policy, |
2ef0f1c2 | 2459 | #endif |
df2c07f4 JP |
2460 | .doit = ovs_vport_cmd_get, |
2461 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2462 | }, |
df2c07f4 | 2463 | { .cmd = OVS_VPORT_CMD_SET, |
f1e9590e YHW |
2464 | #ifdef HAVE_GENL_VALIDATE_FLAGS |
2465 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, | |
2466 | #endif | |
a6a8674d | 2467 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
2ef0f1c2 | 2468 | #ifdef HAVE_GENL_OPS_POLICY |
f0fef760 | 2469 | .policy = vport_policy, |
2ef0f1c2 | 2470 | #endif |
df2c07f4 | 2471 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2472 | }, |
2473 | }; | |
2474 | ||
ba63fe26 | 2475 | struct genl_family dp_vport_genl_family __ro_after_init = { |
cb25142c PS |
2476 | .hdrsize = sizeof(struct ovs_header), |
2477 | .name = OVS_VPORT_FAMILY, | |
2478 | .version = OVS_VPORT_VERSION, | |
2479 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2ef0f1c2 JB |
2480 | #ifndef HAVE_GENL_OPS_POLICY |
2481 | .policy = vport_policy, | |
2482 | #endif | |
cb25142c PS |
2483 | .netnsok = true, |
2484 | .parallel_ops = true, | |
2485 | .ops = dp_vport_genl_ops, | |
2486 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2487 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2488 | .n_mcgrps = 1, | |
ba63fe26 | 2489 | .module = THIS_MODULE, |
982b8810 | 2490 | }; |
ed099e92 | 2491 | |
18fd3a52 | 2492 | static struct genl_family *dp_genl_families[] = { |
cb25142c PS |
2493 | &dp_datapath_genl_family, |
2494 | &dp_vport_genl_family, | |
2495 | &dp_flow_genl_family, | |
2496 | &dp_packet_genl_family, | |
1cb57039 | 2497 | &dp_meter_genl_family, |
cb2a5486 YHW |
2498 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2499 | &dp_ct_limit_genl_family, | |
2500 | #endif | |
982b8810 | 2501 | }; |
ed099e92 | 2502 | |
982b8810 BP |
2503 | static void dp_unregister_genl(int n_families) |
2504 | { | |
2505 | int i; | |
ed099e92 | 2506 | |
b867ca75 | 2507 | for (i = 0; i < n_families; i++) |
cb25142c | 2508 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2509 | } |
2510 | ||
ba63fe26 | 2511 | static int __init dp_register_genl(void) |
064af421 | 2512 | { |
982b8810 BP |
2513 | int err; |
2514 | int i; | |
064af421 | 2515 | |
982b8810 | 2516 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2517 | |
cb25142c | 2518 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2519 | if (err) |
2520 | goto error; | |
982b8810 | 2521 | } |
9cc8b4e4 | 2522 | |
982b8810 | 2523 | return 0; |
064af421 BP |
2524 | |
2525 | error: | |
cb25142c | 2526 | dp_unregister_genl(i); |
982b8810 | 2527 | return err; |
064af421 BP |
2528 | } |
2529 | ||
2a4999f3 PS |
2530 | static int __net_init ovs_init_net(struct net *net) |
2531 | { | |
2532 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2533 | ||
2534 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2535 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
7f4a5d68 | 2536 | ovs_netns_frags_init(net); |
2537 | ovs_netns_frags6_init(net); | |
cb2a5486 | 2538 | return ovs_ct_init(net); |
2a4999f3 PS |
2539 | } |
2540 | ||
cabd5516 PS |
2541 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2542 | struct list_head *head) | |
2a4999f3 PS |
2543 | { |
2544 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2545 | struct datapath *dp; |
2546 | ||
2547 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2548 | int i; | |
2549 | ||
2550 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2551 | struct vport *vport; | |
2552 | ||
2553 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
cabd5516 PS |
2554 | |
2555 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2556 | continue; | |
2557 | ||
e23775f2 | 2558 | if (dev_net(vport->dev) == dnet) |
cabd5516 PS |
2559 | list_add(&vport->detach_list, head); |
2560 | } | |
2561 | } | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2566 | { | |
2567 | struct datapath *dp, *dp_next; | |
2568 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2569 | struct vport *vport, *vport_next; | |
2570 | struct net *net; | |
2571 | LIST_HEAD(head); | |
2a4999f3 | 2572 | |
7f4a5d68 | 2573 | ovs_netns_frags6_exit(dnet); |
2574 | ovs_netns_frags_exit(dnet); | |
cd2a59e9 | 2575 | ovs_lock(); |
fa57e9e4 TZ |
2576 | |
2577 | ovs_ct_exit(dnet); | |
2578 | ||
cd2a59e9 PS |
2579 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2580 | __dp_destroy(dp); | |
cabd5516 | 2581 | |
3d10a0c8 YHW |
2582 | #ifdef HAVE_NET_RWSEM |
2583 | down_read(&net_rwsem); | |
2584 | #else | |
cabd5516 | 2585 | rtnl_lock(); |
3d10a0c8 | 2586 | #endif |
cabd5516 PS |
2587 | for_each_net(net) |
2588 | list_vports_from_net(net, dnet, &head); | |
3d10a0c8 YHW |
2589 | #ifdef HAVE_NET_RWSEM |
2590 | up_read(&net_rwsem); | |
2591 | #else | |
cabd5516 | 2592 | rtnl_unlock(); |
3d10a0c8 | 2593 | #endif |
cabd5516 PS |
2594 | |
2595 | /* Detach all vports from given namespace. */ | |
2596 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2597 | list_del(&vport->detach_list); | |
2598 | ovs_dp_detach_port(vport); | |
2599 | } | |
2600 | ||
cd2a59e9 PS |
2601 | ovs_unlock(); |
2602 | ||
2603 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2604 | } |
2605 | ||
2606 | static struct pernet_operations ovs_net_ops = { | |
2607 | .init = ovs_init_net, | |
2608 | .exit = ovs_exit_net, | |
2609 | .id = &ovs_net_id, | |
2610 | .size = sizeof(struct ovs_net), | |
2611 | }; | |
2612 | ||
22d24ebf BP |
2613 | static int __init dp_init(void) |
2614 | { | |
2615 | int err; | |
2616 | ||
9cfa4718 | 2617 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb)); |
22d24ebf | 2618 | |
26bfaeaa | 2619 | pr_info("Open vSwitch switching datapath %s\n", VERSION); |
064af421 | 2620 | |
907c26a8 | 2621 | ovs_nsh_init(); |
595e069a JS |
2622 | err = action_fifos_init(); |
2623 | if (err) | |
7f4a5d68 | 2624 | goto error; |
595e069a | 2625 | |
5282e284 | 2626 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2627 | if (err) |
2628 | goto error_action_fifos_exit; | |
2629 | ||
5282e284 TG |
2630 | err = ovs_flow_init(); |
2631 | if (err) | |
2632 | goto error_unreg_rtnl_link; | |
2633 | ||
850b6b3b | 2634 | err = ovs_vport_init(); |
064af421 BP |
2635 | if (err) |
2636 | goto error_flow_exit; | |
2637 | ||
2a4999f3 | 2638 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2639 | if (err) |
2640 | goto error_vport_exit; | |
2641 | ||
7f4a5d68 | 2642 | err = compat_init(); |
2a4999f3 PS |
2643 | if (err) |
2644 | goto error_netns_exit; | |
2645 | ||
7f4a5d68 | 2646 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2647 | if (err) | |
2648 | goto error_compat_exit; | |
2649 | ||
5a38795f TG |
2650 | err = ovs_netdev_init(); |
2651 | if (err) | |
2652 | goto error_unreg_notifier; | |
2653 | ||
982b8810 BP |
2654 | err = dp_register_genl(); |
2655 | if (err < 0) | |
5a38795f | 2656 | goto error_unreg_netdev; |
982b8810 | 2657 | |
064af421 BP |
2658 | return 0; |
2659 | ||
5a38795f TG |
2660 | error_unreg_netdev: |
2661 | ovs_netdev_exit(); | |
064af421 | 2662 | error_unreg_notifier: |
850b6b3b | 2663 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2664 | error_compat_exit: |
2665 | compat_exit(); | |
2a4999f3 PS |
2666 | error_netns_exit: |
2667 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2668 | error_vport_exit: |
850b6b3b | 2669 | ovs_vport_exit(); |
064af421 | 2670 | error_flow_exit: |
850b6b3b | 2671 | ovs_flow_exit(); |
5282e284 TG |
2672 | error_unreg_rtnl_link: |
2673 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2674 | error_action_fifos_exit: |
2675 | action_fifos_exit(); | |
064af421 | 2676 | error: |
907c26a8 | 2677 | ovs_nsh_cleanup(); |
064af421 BP |
2678 | return err; |
2679 | } | |
2680 | ||
2681 | static void dp_cleanup(void) | |
2682 | { | |
982b8810 | 2683 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2684 | ovs_netdev_exit(); |
850b6b3b | 2685 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2686 | compat_exit(); |
2a4999f3 PS |
2687 | unregister_pernet_device(&ovs_net_ops); |
2688 | rcu_barrier(); | |
850b6b3b JG |
2689 | ovs_vport_exit(); |
2690 | ovs_flow_exit(); | |
5282e284 | 2691 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2692 | action_fifos_exit(); |
907c26a8 | 2693 | ovs_nsh_cleanup(); |
064af421 BP |
2694 | } |
2695 | ||
2696 | module_init(dp_init); | |
2697 | module_exit(dp_cleanup); | |
2698 | ||
2699 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2700 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2701 | MODULE_VERSION(VERSION); |
75e2077e TLSC |
2702 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2703 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2704 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2705 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
1cb57039 | 2706 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
cb2a5486 | 2707 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |