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Commit | Line | Data |
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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 | ||
18fd3a52 PS |
74 | static struct genl_multicast_group ovs_dp_flow_multicast_group = { |
75 | .name = OVS_FLOW_MCGROUP | |
cb25142c PS |
76 | }; |
77 | ||
18fd3a52 PS |
78 | static struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
79 | .name = OVS_DATAPATH_MCGROUP | |
cb25142c PS |
80 | }; |
81 | ||
18fd3a52 PS |
82 | 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 | ||
18fd3a52 | 96 | static void ovs_notify(struct genl_family *family, struct genl_multicast_group *grp, |
cb25142c | 97 | struct sk_buff *skb, struct genl_info *info) |
e297c6b7 | 98 | { |
0643a78b | 99 | genl_notify(family, skb, info, GROUP_ID(grp), GFP_KERNEL); |
e297c6b7 TG |
100 | } |
101 | ||
ed099e92 BP |
102 | /** |
103 | * DOC: Locking: | |
064af421 | 104 | * |
cd2a59e9 PS |
105 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
106 | * operations on vports, etc.), Writes to other state (flow table | |
107 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
108 | * by ovs_lock. | |
ed099e92 BP |
109 | * |
110 | * Reads are protected by RCU. | |
111 | * | |
112 | * There are a few special cases (mostly stats) that have their own | |
113 | * synchronization but they nest under all of above and don't interact with | |
114 | * each other. | |
cd2a59e9 PS |
115 | * |
116 | * The RTNL lock nests inside ovs_mutex. | |
064af421 | 117 | */ |
ed099e92 | 118 | |
cd2a59e9 PS |
119 | static DEFINE_MUTEX(ovs_mutex); |
120 | ||
121 | void ovs_lock(void) | |
122 | { | |
123 | mutex_lock(&ovs_mutex); | |
124 | } | |
125 | ||
126 | void ovs_unlock(void) | |
127 | { | |
128 | mutex_unlock(&ovs_mutex); | |
129 | } | |
130 | ||
131 | #ifdef CONFIG_LOCKDEP | |
132 | int lockdep_ovsl_is_held(void) | |
133 | { | |
134 | if (debug_locks) | |
135 | return lockdep_is_held(&ovs_mutex); | |
136 | else | |
137 | return 1; | |
138 | } | |
139 | #endif | |
140 | ||
5ae440c3 | 141 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
f1f60b85 | 142 | const struct sw_flow_key *, |
4c7804f1 WT |
143 | const struct dp_upcall_info *, |
144 | uint32_t cutlen); | |
5ae440c3 | 145 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
7d16c847 | 146 | const struct sw_flow_key *, |
4c7804f1 WT |
147 | const struct dp_upcall_info *, |
148 | uint32_t cutlen); | |
064af421 | 149 | |
cd2a59e9 | 150 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
850b6b3b | 151 | const char *ovs_dp_name(const struct datapath *dp) |
f2459fe7 | 152 | { |
cd2a59e9 | 153 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
e23775f2 | 154 | return ovs_vport_name(vport); |
f2459fe7 JG |
155 | } |
156 | ||
f1f60b85 | 157 | static int get_dpifindex(const struct datapath *dp) |
99769a40 JG |
158 | { |
159 | struct vport *local; | |
160 | int ifindex; | |
161 | ||
162 | rcu_read_lock(); | |
163 | ||
95b1d73a | 164 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
99769a40 | 165 | if (local) |
e23775f2 | 166 | ifindex = local->dev->ifindex; |
99769a40 JG |
167 | else |
168 | ifindex = 0; | |
169 | ||
170 | rcu_read_unlock(); | |
171 | ||
172 | return ifindex; | |
173 | } | |
174 | ||
46c6a11d JG |
175 | static void destroy_dp_rcu(struct rcu_head *rcu) |
176 | { | |
177 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 178 | |
e379e4d1 | 179 | ovs_flow_tbl_destroy(&dp->table); |
46c6a11d | 180 | free_percpu(dp->stats_percpu); |
95b1d73a | 181 | kfree(dp->ports); |
1cb57039 | 182 | ovs_meters_exit(dp); |
5ca1ba48 | 183 | kfree(dp); |
46c6a11d JG |
184 | } |
185 | ||
95b1d73a PS |
186 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
187 | u16 port_no) | |
188 | { | |
189 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
190 | } | |
191 | ||
aa917006 | 192 | /* Called with ovs_mutex or RCU read lock. */ |
95b1d73a PS |
193 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
194 | { | |
195 | struct vport *vport; | |
95b1d73a PS |
196 | struct hlist_head *head; |
197 | ||
198 | head = vport_hash_bucket(dp, port_no); | |
f8dfbcb7 | 199 | hlist_for_each_entry_rcu(vport, head, dp_hash_node) { |
95b1d73a PS |
200 | if (vport->port_no == port_no) |
201 | return vport; | |
202 | } | |
203 | return NULL; | |
204 | } | |
205 | ||
cd2a59e9 | 206 | /* Called with ovs_mutex. */ |
c19e6535 | 207 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 208 | { |
f2459fe7 | 209 | struct vport *vport; |
f2459fe7 | 210 | |
850b6b3b | 211 | vport = ovs_vport_add(parms); |
c19e6535 BP |
212 | if (!IS_ERR(vport)) { |
213 | struct datapath *dp = parms->dp; | |
95b1d73a | 214 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
064af421 | 215 | |
95b1d73a | 216 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
c19e6535 | 217 | } |
c19e6535 | 218 | return vport; |
064af421 BP |
219 | } |
220 | ||
850b6b3b | 221 | void ovs_dp_detach_port(struct vport *p) |
064af421 | 222 | { |
cd2a59e9 | 223 | ASSERT_OVSL(); |
064af421 | 224 | |
064af421 | 225 | /* First drop references to device. */ |
95b1d73a | 226 | hlist_del_rcu(&p->dp_hash_node); |
f2459fe7 | 227 | |
7237e4f4 | 228 | /* Then destroy it. */ |
850b6b3b | 229 | ovs_vport_del(p); |
064af421 BP |
230 | } |
231 | ||
fb66fbd1 | 232 | /* Must be called with rcu_read_lock. */ |
e74d4817 | 233 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 234 | { |
a6059080 | 235 | const struct vport *p = OVS_CB(skb)->input_vport; |
064af421 | 236 | struct datapath *dp = p->dp; |
3544358a | 237 | struct sw_flow *flow; |
ad50cb60 | 238 | struct sw_flow_actions *sf_acts; |
064af421 | 239 | struct dp_stats_percpu *stats; |
e9141eec | 240 | u64 *stats_counter; |
4fa72a95 | 241 | u32 n_mask_hit; |
064af421 | 242 | |
70dbc259 | 243 | stats = this_cpu_ptr(dp->stats_percpu); |
a063b0df | 244 | |
52a23d92 | 245 | /* Look up flow. */ |
e74d4817 | 246 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
5604935e | 247 | &n_mask_hit); |
52a23d92 JG |
248 | if (unlikely(!flow)) { |
249 | struct dp_upcall_info upcall; | |
a7d607c5 | 250 | int error; |
52a23d92 | 251 | |
0e469d3b | 252 | memset(&upcall, 0, sizeof(upcall)); |
52a23d92 | 253 | upcall.cmd = OVS_PACKET_CMD_MISS; |
beb1c69a | 254 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
a94ebc39 | 255 | upcall.mru = OVS_CB(skb)->mru; |
4c7804f1 | 256 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
a7d607c5 LR |
257 | if (unlikely(error)) |
258 | kfree_skb(skb); | |
259 | else | |
260 | consume_skb(skb); | |
52a23d92 JG |
261 | stats_counter = &stats->n_missed; |
262 | goto out; | |
263 | } | |
264 | ||
e74d4817 | 265 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
ad50cb60 | 266 | sf_acts = rcu_dereference(flow->sf_acts); |
7d16c847 PS |
267 | ovs_execute_actions(dp, skb, sf_acts, key); |
268 | ||
b0b906cc | 269 | stats_counter = &stats->n_hit; |
55574bb0 | 270 | |
8819fac7 | 271 | out: |
55574bb0 | 272 | /* Update datapath statistics. */ |
b81deb15 | 273 | u64_stats_update_begin(&stats->syncp); |
e9141eec | 274 | (*stats_counter)++; |
4fa72a95 | 275 | stats->n_mask_hit += n_mask_hit; |
b81deb15 | 276 | u64_stats_update_end(&stats->syncp); |
064af421 BP |
277 | } |
278 | ||
850b6b3b | 279 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 280 | const struct sw_flow_key *key, |
4c7804f1 WT |
281 | const struct dp_upcall_info *upcall_info, |
282 | uint32_t cutlen) | |
aa5a8fdc JG |
283 | { |
284 | struct dp_stats_percpu *stats; | |
285 | int err; | |
286 | ||
28aea917 | 287 | if (upcall_info->portid == 0) { |
b063d9f0 | 288 | err = -ENOTCONN; |
b063d9f0 JG |
289 | goto err; |
290 | } | |
291 | ||
7257b535 | 292 | if (!skb_is_gso(skb)) |
4c7804f1 | 293 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
7257b535 | 294 | else |
4c7804f1 | 295 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
d76195db JG |
296 | if (err) |
297 | goto err; | |
298 | ||
299 | return 0; | |
aa5a8fdc | 300 | |
aa5a8fdc | 301 | err: |
70dbc259 | 302 | stats = this_cpu_ptr(dp->stats_percpu); |
aa5a8fdc | 303 | |
b81deb15 | 304 | u64_stats_update_begin(&stats->syncp); |
aa5a8fdc | 305 | stats->n_lost++; |
b81deb15 | 306 | u64_stats_update_end(&stats->syncp); |
aa5a8fdc | 307 | |
aa5a8fdc | 308 | return err; |
982b8810 BP |
309 | } |
310 | ||
5ae440c3 | 311 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 312 | const struct sw_flow_key *key, |
4c7804f1 WT |
313 | const struct dp_upcall_info *upcall_info, |
314 | uint32_t cutlen) | |
cb5087ca | 315 | { |
969b8e6b | 316 | #ifdef HAVE_SKB_GSO_UDP |
f54a7a5d | 317 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
7257b535 | 318 | struct sw_flow_key later_key; |
969b8e6b | 319 | #endif |
7257b535 | 320 | struct sk_buff *segs, *nskb; |
b2a23c4e | 321 | struct ovs_skb_cb ovs_cb; |
7257b535 | 322 | int err; |
cb5087ca | 323 | |
b2a23c4e | 324 | ovs_cb = *OVS_CB(skb); |
1d04cd4e | 325 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
b2a23c4e | 326 | *OVS_CB(skb) = ovs_cb; |
79089764 PS |
327 | if (IS_ERR(segs)) |
328 | return PTR_ERR(segs); | |
d1da7669 PS |
329 | if (segs == NULL) |
330 | return -EINVAL; | |
969b8e6b | 331 | #ifdef HAVE_SKB_GSO_UDP |
9b277b39 | 332 | if (gso_type & SKB_GSO_UDP) { |
c135bba1 | 333 | /* The initial flow key extracted by ovs_flow_key_extract() |
9b277b39 PS |
334 | * in this case is for a first fragment, so we need to |
335 | * properly mark later fragments. | |
336 | */ | |
e74d4817 | 337 | later_key = *key; |
9b277b39 PS |
338 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; |
339 | } | |
969b8e6b | 340 | #endif |
7257b535 BP |
341 | /* Queue all of the segments. */ |
342 | skb = segs; | |
cb5087ca | 343 | do { |
b2a23c4e | 344 | *OVS_CB(skb) = ovs_cb; |
969b8e6b | 345 | #ifdef HAVE_SKB_GSO_UDP |
9b277b39 | 346 | if (gso_type & SKB_GSO_UDP && skb != segs) |
e74d4817 | 347 | key = &later_key; |
969b8e6b | 348 | #endif |
4c7804f1 | 349 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
982b8810 | 350 | if (err) |
7257b535 | 351 | break; |
856081f6 | 352 | |
36ce148c | 353 | } while ((skb = skb->next)); |
cb5087ca | 354 | |
7257b535 BP |
355 | /* Free all of the segments. */ |
356 | skb = segs; | |
357 | do { | |
358 | nskb = skb->next; | |
359 | if (err) | |
360 | kfree_skb(skb); | |
361 | else | |
362 | consume_skb(skb); | |
363 | } while ((skb = nskb)); | |
364 | return err; | |
365 | } | |
366 | ||
8b7ea2d4 | 367 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
6b330a60 | 368 | unsigned int hdrlen, int actions_attrlen) |
0afa2373 TG |
369 | { |
370 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
533bea51 | 371 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
039fb36c WT |
372 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
373 | + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */ | |
0afa2373 TG |
374 | |
375 | /* OVS_PACKET_ATTR_USERDATA */ | |
8b7ea2d4 WZ |
376 | if (upcall_info->userdata) |
377 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
378 | ||
379 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
380 | if (upcall_info->egress_tun_info) | |
381 | size += nla_total_size(ovs_tun_key_attr_size()); | |
0afa2373 | 382 | |
0e469d3b NM |
383 | /* OVS_PACKET_ATTR_ACTIONS */ |
384 | if (upcall_info->actions_len) | |
6b330a60 | 385 | size += nla_total_size(actions_attrlen); |
0e469d3b | 386 | |
a94ebc39 JS |
387 | /* OVS_PACKET_ATTR_MRU */ |
388 | if (upcall_info->mru) | |
389 | size += nla_total_size(sizeof(upcall_info->mru)); | |
390 | ||
0afa2373 TG |
391 | return size; |
392 | } | |
393 | ||
a94ebc39 JS |
394 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
395 | { | |
396 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
397 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
398 | ||
399 | if (plen > 0) | |
0ace0a26 | 400 | skb_put_zero(skb, plen); |
a94ebc39 JS |
401 | } |
402 | } | |
403 | ||
5ae440c3 | 404 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
f1f60b85 | 405 | const struct sw_flow_key *key, |
4c7804f1 WT |
406 | const struct dp_upcall_info *upcall_info, |
407 | uint32_t cutlen) | |
7257b535 BP |
408 | { |
409 | struct ovs_header *upcall; | |
6161d3fd | 410 | struct sk_buff *nskb = NULL; |
82706a6f | 411 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
7257b535 | 412 | struct nlattr *nla; |
978188b2 | 413 | size_t len; |
533bea51 | 414 | unsigned int hlen; |
5ae440c3 TG |
415 | int err, dp_ifindex; |
416 | ||
417 | dp_ifindex = get_dpifindex(dp); | |
418 | if (!dp_ifindex) | |
419 | return -ENODEV; | |
7257b535 | 420 | |
efd8a18e | 421 | if (skb_vlan_tag_present(skb)) { |
6161d3fd JG |
422 | nskb = skb_clone(skb, GFP_ATOMIC); |
423 | if (!nskb) | |
424 | return -ENOMEM; | |
07ac71ea | 425 | |
8063e095 | 426 | nskb = __vlan_hwaccel_push_inside(nskb); |
07ac71ea PS |
427 | if (!nskb) |
428 | return -ENOMEM; | |
429 | ||
6161d3fd JG |
430 | skb = nskb; |
431 | } | |
432 | ||
433 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
434 | err = -EFBIG; | |
435 | goto out; | |
436 | } | |
7257b535 | 437 | |
533bea51 TG |
438 | /* Complete checksum if needed */ |
439 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
a0c9fedc | 440 | (err = skb_csum_hwoffload_help(skb, 0))) |
533bea51 TG |
441 | goto out; |
442 | ||
443 | /* Older versions of OVS user space enforce alignment of the last | |
444 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
445 | * padding logic. Only perform zerocopy if padding is not required. | |
446 | */ | |
447 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
448 | hlen = skb_zerocopy_headlen(skb); | |
449 | else | |
450 | hlen = skb->len; | |
451 | ||
6b330a60 GR |
452 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
453 | OVS_CB(skb)->acts_origlen); | |
40c08cda | 454 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
6161d3fd JG |
455 | if (!user_skb) { |
456 | err = -ENOMEM; | |
457 | goto out; | |
458 | } | |
7257b535 BP |
459 | |
460 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
461 | 0, upcall_info->cmd); | |
462 | upcall->dp_ifindex = dp_ifindex; | |
463 | ||
db7f2238 | 464 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 465 | BUG_ON(err); |
7257b535 BP |
466 | |
467 | if (upcall_info->userdata) | |
e995e3df | 468 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 469 | nla_len(upcall_info->userdata), |
e995e3df | 470 | nla_data(upcall_info->userdata)); |
7257b535 | 471 | |
e23775f2 | 472 | |
8b7ea2d4 WZ |
473 | if (upcall_info->egress_tun_info) { |
474 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
aad7cb91 PS |
475 | err = ovs_nla_put_tunnel_info(user_skb, |
476 | upcall_info->egress_tun_info); | |
8b7ea2d4 WZ |
477 | BUG_ON(err); |
478 | nla_nest_end(user_skb, nla); | |
479 | } | |
480 | ||
0e469d3b NM |
481 | if (upcall_info->actions_len) { |
482 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
483 | err = ovs_nla_put_actions(upcall_info->actions, | |
484 | upcall_info->actions_len, | |
485 | user_skb); | |
486 | if (!err) | |
487 | nla_nest_end(user_skb, nla); | |
488 | else | |
489 | nla_nest_cancel(user_skb, nla); | |
490 | } | |
491 | ||
a94ebc39 JS |
492 | /* Add OVS_PACKET_ATTR_MRU */ |
493 | if (upcall_info->mru) { | |
494 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
495 | upcall_info->mru)) { | |
496 | err = -ENOBUFS; | |
497 | goto out; | |
498 | } | |
499 | pad_packet(dp, user_skb); | |
500 | } | |
501 | ||
039fb36c WT |
502 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
503 | if (cutlen > 0) { | |
504 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
505 | skb->len)) { | |
506 | err = -ENOBUFS; | |
507 | goto out; | |
508 | } | |
509 | pad_packet(dp, user_skb); | |
510 | } | |
511 | ||
533bea51 | 512 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
513 | * in skb_zerocopy() |
514 | */ | |
533bea51 TG |
515 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
516 | err = -ENOBUFS; | |
517 | goto out; | |
518 | } | |
4c7804f1 | 519 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
bed53bd1 | 520 | |
4c7804f1 | 521 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
2c272bd9 ZK |
522 | if (err) |
523 | goto out; | |
7257b535 | 524 | |
ef507cec | 525 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
a94ebc39 | 526 | pad_packet(dp, user_skb); |
ef507cec | 527 | |
533bea51 | 528 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 529 | |
533bea51 | 530 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 531 | user_skb = NULL; |
6161d3fd | 532 | out: |
2c272bd9 ZK |
533 | if (err) |
534 | skb_tx_error(skb); | |
82706a6f | 535 | kfree_skb(user_skb); |
6161d3fd JG |
536 | kfree_skb(nskb); |
537 | return err; | |
cb5087ca BP |
538 | } |
539 | ||
df2c07f4 | 540 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 541 | { |
df2c07f4 | 542 | struct ovs_header *ovs_header = info->userhdr; |
a94ebc39 | 543 | struct net *net = sock_net(skb->sk); |
982b8810 | 544 | struct nlattr **a = info->attrs; |
e0e57990 | 545 | struct sw_flow_actions *acts; |
982b8810 | 546 | struct sk_buff *packet; |
e0e57990 | 547 | struct sw_flow *flow; |
ad50cb60 | 548 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 549 | struct datapath *dp; |
a6059080 | 550 | struct vport *input_vport; |
a94ebc39 | 551 | u16 mru = 0; |
3f19d399 | 552 | int len; |
d6569377 | 553 | int err; |
2e460098 | 554 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 555 | |
f7cd0081 | 556 | err = -EINVAL; |
df2c07f4 | 557 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 558 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 559 | goto err; |
064af421 | 560 | |
df2c07f4 | 561 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 562 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
563 | err = -ENOMEM; |
564 | if (!packet) | |
e5cad958 | 565 | goto err; |
3f19d399 BP |
566 | skb_reserve(packet, NET_IP_ALIGN); |
567 | ||
bf3d6fce | 568 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 569 | |
a94ebc39 JS |
570 | /* Set packet's mru */ |
571 | if (a[OVS_PACKET_ATTR_MRU]) { | |
572 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
573 | packet->ignore_df = 1; | |
574 | } | |
575 | OVS_CB(packet)->mru = mru; | |
576 | ||
e0e57990 | 577 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 578 | flow = ovs_flow_alloc(); |
e0e57990 BP |
579 | err = PTR_ERR(flow); |
580 | if (IS_ERR(flow)) | |
e5cad958 | 581 | goto err_kfree_skb; |
064af421 | 582 | |
038e34ab JS |
583 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
584 | packet, &flow->key, log); | |
e0e57990 | 585 | if (err) |
9321954a | 586 | goto err_flow_free; |
e0e57990 | 587 | |
a94ebc39 | 588 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 589 | &flow->key, &acts, log); |
9b405f1a PS |
590 | if (err) |
591 | goto err_flow_free; | |
e0e57990 | 592 | |
ff27161e | 593 | rcu_assign_pointer(flow->sf_acts, acts); |
abff858b | 594 | packet->priority = flow->key.phy.priority; |
3025a772 | 595 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 596 | |
d6569377 | 597 | rcu_read_lock(); |
a94ebc39 | 598 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
f7cd0081 | 599 | err = -ENODEV; |
e5cad958 BP |
600 | if (!dp) |
601 | goto err_unlock; | |
cc4015df | 602 | |
a6059080 AZ |
603 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
604 | if (!input_vport) | |
605 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
606 | ||
607 | if (!input_vport) | |
608 | goto err_unlock; | |
609 | ||
e23775f2 | 610 | packet->dev = input_vport->dev; |
a6059080 | 611 | OVS_CB(packet)->input_vport = input_vport; |
ad50cb60 | 612 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 613 | |
e9141eec | 614 | local_bh_disable(); |
7d16c847 | 615 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 616 | local_bh_enable(); |
d6569377 | 617 | rcu_read_unlock(); |
e0e57990 | 618 | |
a1c564be | 619 | ovs_flow_free(flow, false); |
e5cad958 | 620 | return err; |
064af421 | 621 | |
e5cad958 BP |
622 | err_unlock: |
623 | rcu_read_unlock(); | |
9321954a | 624 | err_flow_free: |
a1c564be | 625 | ovs_flow_free(flow, false); |
e5cad958 BP |
626 | err_kfree_skb: |
627 | kfree_skb(packet); | |
628 | err: | |
d6569377 | 629 | return err; |
064af421 BP |
630 | } |
631 | ||
df2c07f4 | 632 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 633 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
634 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
635 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 636 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
a94ebc39 | 637 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
982b8810 BP |
638 | }; |
639 | ||
18fd3a52 | 640 | static struct genl_ops dp_packet_genl_ops[] = { |
df2c07f4 | 641 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
a6a8674d | 642 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
982b8810 | 643 | .policy = packet_policy, |
df2c07f4 | 644 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
645 | } |
646 | }; | |
647 | ||
ba63fe26 | 648 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
cb25142c PS |
649 | .hdrsize = sizeof(struct ovs_header), |
650 | .name = OVS_PACKET_FAMILY, | |
651 | .version = OVS_PACKET_VERSION, | |
652 | .maxattr = OVS_PACKET_ATTR_MAX, | |
653 | .netnsok = true, | |
654 | .parallel_ops = true, | |
655 | .ops = dp_packet_genl_ops, | |
656 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
ba63fe26 | 657 | .module = THIS_MODULE, |
cb25142c PS |
658 | }; |
659 | ||
f1f60b85 | 660 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 661 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 662 | { |
d6569377 | 663 | int i; |
f180c2e2 | 664 | |
4fa72a95 AZ |
665 | memset(mega_stats, 0, sizeof(*mega_stats)); |
666 | ||
994dc286 | 667 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 668 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 669 | |
7257b535 | 670 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 671 | |
d6569377 BP |
672 | for_each_possible_cpu(i) { |
673 | const struct dp_stats_percpu *percpu_stats; | |
674 | struct dp_stats_percpu local_stats; | |
821cb9fa | 675 | unsigned int start; |
44e05eca | 676 | |
d6569377 | 677 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 678 | |
d6569377 | 679 | do { |
b81deb15 | 680 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 681 | local_stats = *percpu_stats; |
b81deb15 | 682 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 683 | |
d6569377 BP |
684 | stats->n_hit += local_stats.n_hit; |
685 | stats->n_missed += local_stats.n_missed; | |
686 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 687 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
688 | } |
689 | } | |
064af421 | 690 | |
bc619e29 JS |
691 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
692 | { | |
693 | return ovs_identifier_is_ufid(sfid) && | |
694 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
695 | } | |
696 | ||
697 | static bool should_fill_mask(uint32_t ufid_flags) | |
698 | { | |
699 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
700 | } | |
701 | ||
702 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 703 | { |
bc619e29 JS |
704 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
705 | } | |
706 | ||
707 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
708 | const struct sw_flow_id *sfid, | |
709 | uint32_t ufid_flags) | |
710 | { | |
711 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
712 | ||
713 | /* OVS_FLOW_ATTR_UFID */ | |
714 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
715 | len += nla_total_size(sfid->ufid_len); | |
716 | ||
717 | /* OVS_FLOW_ATTR_KEY */ | |
718 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
719 | len += nla_total_size(ovs_key_attr_size()); | |
720 | ||
721 | /* OVS_FLOW_ATTR_MASK */ | |
722 | if (should_fill_mask(ufid_flags)) | |
723 | len += nla_total_size(ovs_key_attr_size()); | |
724 | ||
725 | /* OVS_FLOW_ATTR_ACTIONS */ | |
726 | if (should_fill_actions(ufid_flags)) | |
c3bb15b3 | 727 | len += nla_total_size(acts->orig_len); |
bc619e29 JS |
728 | |
729 | return len | |
91b37647 | 730 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
0afa2373 | 731 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
91b37647 | 732 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
733 | } |
734 | ||
f1948bb9 JS |
735 | /* Called with ovs_mutex or RCU read lock. */ |
736 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
737 | struct sk_buff *skb) | |
738 | { | |
739 | struct ovs_flow_stats stats; | |
740 | __be16 tcp_flags; | |
741 | unsigned long used; | |
742 | ||
b0f3a2fe | 743 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 744 | |
b0f3a2fe | 745 | if (used && |
89be7da8 PS |
746 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
747 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 748 | return -EMSGSIZE; |
d6569377 | 749 | |
b0f3a2fe | 750 | if (stats.n_packets && |
91b37647 PS |
751 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
752 | sizeof(struct ovs_flow_stats), &stats, | |
753 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 754 | return -EMSGSIZE; |
b0b906cc | 755 | |
b0f3a2fe PS |
756 | if ((u8)ntohs(tcp_flags) && |
757 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
758 | return -EMSGSIZE; |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | /* Called with ovs_mutex or RCU read lock. */ | |
764 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
765 | struct sk_buff *skb, int skb_orig_len) | |
766 | { | |
767 | struct nlattr *start; | |
768 | int err; | |
d6569377 | 769 | |
df2c07f4 | 770 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
771 | * this is the first flow to be dumped into 'skb'. This is unusual for |
772 | * Netlink but individual action lists can be longer than | |
773 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
774 | * The userspace caller can always fetch the actions separately if it | |
775 | * really wants them. (Most userspace callers in fact don't care.) | |
776 | * | |
777 | * This can only fail for dump operations because the skb is always | |
778 | * properly sized for single flows. | |
779 | */ | |
9b405f1a | 780 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 781 | if (start) { |
f44ccce1 PS |
782 | const struct sw_flow_actions *sf_acts; |
783 | ||
780ec6ae | 784 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
785 | err = ovs_nla_put_actions(sf_acts->actions, |
786 | sf_acts->actions_len, skb); | |
f71db6b1 | 787 | |
0a25b039 BP |
788 | if (!err) |
789 | nla_nest_end(skb, start); | |
790 | else { | |
791 | if (skb_orig_len) | |
f1948bb9 | 792 | return err; |
0a25b039 BP |
793 | |
794 | nla_nest_cancel(skb, start); | |
795 | } | |
f1948bb9 JS |
796 | } else if (skb_orig_len) { |
797 | return -EMSGSIZE; | |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 804 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 805 | struct sk_buff *skb, u32 portid, |
bc619e29 | 806 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
807 | { |
808 | const int skb_orig_len = skb->len; | |
809 | struct ovs_header *ovs_header; | |
810 | int err; | |
811 | ||
7d16c847 PS |
812 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
813 | flags, cmd); | |
f1948bb9 JS |
814 | if (!ovs_header) |
815 | return -EMSGSIZE; | |
7d16c847 | 816 | |
f1948bb9 JS |
817 | ovs_header->dp_ifindex = dp_ifindex; |
818 | ||
bc619e29 | 819 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
820 | if (err) |
821 | goto error; | |
822 | ||
bc619e29 JS |
823 | if (should_fill_key(&flow->id, ufid_flags)) { |
824 | err = ovs_nla_put_masked_key(flow, skb); | |
825 | if (err) | |
826 | goto error; | |
827 | } | |
828 | ||
829 | if (should_fill_mask(ufid_flags)) { | |
830 | err = ovs_nla_put_mask(flow, skb); | |
831 | if (err) | |
832 | goto error; | |
833 | } | |
f1948bb9 JS |
834 | |
835 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
836 | if (err) | |
837 | goto error; | |
838 | ||
bc619e29 JS |
839 | if (should_fill_actions(ufid_flags)) { |
840 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
841 | if (err) | |
842 | goto error; | |
843 | } | |
37a1300c | 844 | |
23b48dc1 TG |
845 | genlmsg_end(skb, ovs_header); |
846 | return 0; | |
d6569377 | 847 | |
37a1300c | 848 | error: |
df2c07f4 | 849 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 850 | return err; |
44e05eca BP |
851 | } |
852 | ||
f71db6b1 JR |
853 | /* May not be called with RCU read lock. */ |
854 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 855 | const struct sw_flow_id *sfid, |
afad3556 | 856 | struct genl_info *info, |
bc619e29 JS |
857 | bool always, |
858 | uint32_t ufid_flags) | |
44e05eca | 859 | { |
afad3556 | 860 | struct sk_buff *skb; |
bc619e29 | 861 | size_t len; |
d6569377 | 862 | |
114fce23 SG |
863 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
864 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
865 | return NULL; |
866 | ||
bc619e29 | 867 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
40c08cda | 868 | skb = genlmsg_new(len, GFP_KERNEL); |
afad3556 JR |
869 | if (!skb) |
870 | return ERR_PTR(-ENOMEM); | |
871 | ||
872 | return skb; | |
37a1300c | 873 | } |
8d5ebd83 | 874 | |
f71db6b1 | 875 | /* Called with ovs_mutex. */ |
7d16c847 | 876 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
877 | int dp_ifindex, |
878 | struct genl_info *info, u8 cmd, | |
bc619e29 | 879 | bool always, u32 ufid_flags) |
37a1300c BP |
880 | { |
881 | struct sk_buff *skb; | |
882 | int retval; | |
d6569377 | 883 | |
bc619e29 JS |
884 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
885 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 886 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 887 | return skb; |
d6569377 | 888 | |
2c622e5a | 889 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 890 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 891 | cmd, ufid_flags); |
37a1300c | 892 | BUG_ON(retval < 0); |
d6569377 | 893 | return skb; |
064af421 BP |
894 | } |
895 | ||
0c9fd022 | 896 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 897 | { |
a94ebc39 | 898 | struct net *net = sock_net(skb->sk); |
37a1300c | 899 | struct nlattr **a = info->attrs; |
df2c07f4 | 900 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 901 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 902 | struct sw_flow_mask mask; |
37a1300c | 903 | struct sk_buff *reply; |
9c52546b | 904 | struct datapath *dp; |
0c9fd022 | 905 | struct sw_flow_actions *acts; |
a1c564be | 906 | struct sw_flow_match match; |
bc619e29 | 907 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 908 | int error; |
9233cef7 | 909 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 910 | |
6740b721 | 911 | /* Must have key and actions. */ |
37a1300c | 912 | error = -EINVAL; |
a473df5b | 913 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 914 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 915 | goto error; |
a473df5b JG |
916 | } |
917 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 918 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 919 | goto error; |
a473df5b | 920 | } |
a1c564be | 921 | |
6740b721 | 922 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
923 | * locking. |
924 | */ | |
6740b721 JR |
925 | new_flow = ovs_flow_alloc(); |
926 | if (IS_ERR(new_flow)) { | |
927 | error = PTR_ERR(new_flow); | |
928 | goto error; | |
929 | } | |
930 | ||
931 | /* Extract key. */ | |
9b94fa6c | 932 | ovs_match_init(&match, &new_flow->key, false, &mask); |
038e34ab | 933 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 934 | a[OVS_FLOW_ATTR_MASK], log); |
37a1300c | 935 | if (error) |
6740b721 | 936 | goto err_kfree_flow; |
064af421 | 937 | |
bc619e29 JS |
938 | /* Extract flow identifier. */ |
939 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
1d334d4f | 940 | &new_flow->key, log); |
bc619e29 JS |
941 | if (error) |
942 | goto err_kfree_flow; | |
9b405f1a | 943 | |
1d334d4f | 944 | /* unmasked key is needed to match when ufid is not used. */ |
945 | if (ovs_identifier_is_key(&new_flow->id)) | |
946 | match.key = new_flow->id.unmasked_key; | |
947 | ||
948 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
949 | ||
6740b721 | 950 | /* Validate actions. */ |
a94ebc39 JS |
951 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
952 | &new_flow->key, &acts, log); | |
0c9fd022 | 953 | if (error) { |
7d16c847 | 954 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 955 | goto err_kfree_flow; |
6740b721 JR |
956 | } |
957 | ||
bc619e29 JS |
958 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
959 | ufid_flags); | |
6740b721 JR |
960 | if (IS_ERR(reply)) { |
961 | error = PTR_ERR(reply); | |
962 | goto err_kfree_acts; | |
37a1300c BP |
963 | } |
964 | ||
cd2a59e9 | 965 | ovs_lock(); |
a94ebc39 | 966 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
967 | if (unlikely(!dp)) { |
968 | error = -ENODEV; | |
cd2a59e9 | 969 | goto err_unlock_ovs; |
6740b721 | 970 | } |
bc619e29 | 971 | |
a1c564be | 972 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
973 | if (ovs_identifier_is_ufid(&new_flow->id)) |
974 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
975 | if (!flow) | |
1d334d4f | 976 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
6740b721 JR |
977 | if (likely(!flow)) { |
978 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 979 | |
d6569377 | 980 | /* Put flow in bucket. */ |
6740b721 JR |
981 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
982 | if (unlikely(error)) { | |
0585f7a8 | 983 | acts = NULL; |
6740b721 JR |
984 | goto err_unlock_ovs; |
985 | } | |
986 | ||
987 | if (unlikely(reply)) { | |
2c622e5a | 988 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
989 | ovs_header->dp_ifindex, |
990 | reply, info->snd_portid, | |
991 | info->snd_seq, 0, | |
bc619e29 JS |
992 | OVS_FLOW_CMD_NEW, |
993 | ufid_flags); | |
6740b721 | 994 | BUG_ON(error < 0); |
0585f7a8 | 995 | } |
6740b721 | 996 | ovs_unlock(); |
d6569377 | 997 | } else { |
0c9fd022 JR |
998 | struct sw_flow_actions *old_acts; |
999 | ||
d6569377 BP |
1000 | /* Bail out if we're not allowed to modify an existing flow. |
1001 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1002 | * because Generic Netlink treats the latter as a dump | |
1003 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1004 | * gets fixed. | |
1005 | */ | |
6740b721 JR |
1006 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1007 | | NLM_F_EXCL))) { | |
1008 | error = -EEXIST; | |
cd2a59e9 | 1009 | goto err_unlock_ovs; |
6740b721 | 1010 | } |
bc619e29 JS |
1011 | /* The flow identifier has to be the same for flow updates. |
1012 | * Look for any overlapping flow. | |
1013 | */ | |
1014 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1015 | if (ovs_identifier_is_key(&flow->id)) | |
1016 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1017 | &match); | |
1018 | else /* UFID matches but key is different */ | |
1019 | flow = NULL; | |
3440e4bc AW |
1020 | if (!flow) { |
1021 | error = -ENOENT; | |
1022 | goto err_unlock_ovs; | |
1023 | } | |
6740b721 | 1024 | } |
0c9fd022 JR |
1025 | /* Update actions. */ |
1026 | old_acts = ovsl_dereference(flow->sf_acts); | |
1027 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1028 | |
6740b721 | 1029 | if (unlikely(reply)) { |
2c622e5a | 1030 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1031 | ovs_header->dp_ifindex, |
1032 | reply, info->snd_portid, | |
1033 | info->snd_seq, 0, | |
bc619e29 JS |
1034 | OVS_FLOW_CMD_NEW, |
1035 | ufid_flags); | |
6740b721 JR |
1036 | BUG_ON(error < 0); |
1037 | } | |
1038 | ovs_unlock(); | |
0c9fd022 | 1039 | |
e23775f2 | 1040 | ovs_nla_free_flow_actions_rcu(old_acts); |
6740b721 | 1041 | ovs_flow_free(new_flow, false); |
0c9fd022 | 1042 | } |
6740b721 JR |
1043 | |
1044 | if (reply) | |
cb25142c | 1045 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1046 | return 0; |
1047 | ||
0c9fd022 JR |
1048 | err_unlock_ovs: |
1049 | ovs_unlock(); | |
6740b721 JR |
1050 | kfree_skb(reply); |
1051 | err_kfree_acts: | |
e23775f2 | 1052 | ovs_nla_free_flow_actions(acts); |
6740b721 JR |
1053 | err_kfree_flow: |
1054 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1055 | error: |
1056 | return error; | |
1057 | } | |
1058 | ||
cc561abf | 1059 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
a94ebc39 JS |
1060 | static struct sw_flow_actions *get_flow_actions(struct net *net, |
1061 | const struct nlattr *a, | |
cc561abf | 1062 | const struct sw_flow_key *key, |
9233cef7 JR |
1063 | const struct sw_flow_mask *mask, |
1064 | bool log) | |
cc561abf PS |
1065 | { |
1066 | struct sw_flow_actions *acts; | |
1067 | struct sw_flow_key masked_key; | |
1068 | int error; | |
1069 | ||
ad4adec2 | 1070 | ovs_flow_mask_key(&masked_key, key, true, mask); |
a94ebc39 | 1071 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
cc561abf | 1072 | if (error) { |
9233cef7 | 1073 | OVS_NLERR(log, |
7d16c847 | 1074 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1075 | return ERR_PTR(error); |
1076 | } | |
1077 | ||
1078 | return acts; | |
1079 | } | |
1080 | ||
850c2a4d TZ |
1081 | /* Factor out match-init and action-copy to avoid |
1082 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1083 | * used to get actions, we new a function to save some | |
1084 | * stack space. | |
1085 | * | |
1086 | * If there are not key and action attrs, we return 0 | |
1087 | * directly. In the case, the caller will also not use the | |
1088 | * match as before. If there is action attr, we try to get | |
1089 | * actions and save them to *acts. Before returning from | |
1090 | * the function, we reset the match->mask pointer. Because | |
1091 | * we should not to return match object with dangling reference | |
1092 | * to mask. | |
1093 | * */ | |
1094 | static int ovs_nla_init_match_and_action(struct net *net, | |
1095 | struct sw_flow_match *match, | |
1096 | struct sw_flow_key *key, | |
1097 | struct nlattr **a, | |
1098 | struct sw_flow_actions **acts, | |
1099 | bool log) | |
1100 | { | |
1101 | struct sw_flow_mask mask; | |
1102 | int error = 0; | |
1103 | ||
1104 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1105 | ovs_match_init(match, key, true, &mask); | |
1106 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1107 | a[OVS_FLOW_ATTR_MASK], log); | |
1108 | if (error) | |
1109 | goto error; | |
1110 | } | |
1111 | ||
1112 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1113 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1114 | OVS_NLERR(log, | |
1115 | "Flow key attribute not present in set flow."); | |
497895ca CJ |
1116 | error = -EINVAL; |
1117 | goto error; | |
850c2a4d TZ |
1118 | } |
1119 | ||
1120 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1121 | &mask, log); | |
1122 | if (IS_ERR(*acts)) { | |
1123 | error = PTR_ERR(*acts); | |
1124 | goto error; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* On success, error is 0. */ | |
1129 | error: | |
1130 | match->mask = NULL; | |
1131 | return error; | |
1132 | } | |
1133 | ||
0c9fd022 JR |
1134 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1135 | { | |
a94ebc39 | 1136 | struct net *net = sock_net(skb->sk); |
0c9fd022 JR |
1137 | struct nlattr **a = info->attrs; |
1138 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1139 | struct sw_flow_key key; |
0c9fd022 | 1140 | struct sw_flow *flow; |
0c9fd022 JR |
1141 | struct sk_buff *reply = NULL; |
1142 | struct datapath *dp; | |
6740b721 | 1143 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1144 | struct sw_flow_match match; |
bc619e29 JS |
1145 | struct sw_flow_id sfid; |
1146 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
b24baa1a | 1147 | int error = 0; |
9233cef7 | 1148 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1149 | bool ufid_present; |
0c9fd022 | 1150 | |
bc619e29 | 1151 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
850c2a4d | 1152 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
b24baa1a PS |
1153 | OVS_NLERR(log, |
1154 | "Flow set message rejected, Key attribute missing."); | |
850c2a4d | 1155 | return -EINVAL; |
b24baa1a | 1156 | } |
850c2a4d TZ |
1157 | |
1158 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1159 | &acts, log); | |
0c9fd022 JR |
1160 | if (error) |
1161 | goto error; | |
d6569377 | 1162 | |
850c2a4d | 1163 | if (acts) { |
ff27161e | 1164 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1165 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1166 | ufid_flags); | |
6740b721 JR |
1167 | if (IS_ERR(reply)) { |
1168 | error = PTR_ERR(reply); | |
1169 | goto err_kfree_acts; | |
90b8c2f7 | 1170 | } |
0c9fd022 JR |
1171 | } |
1172 | ||
1173 | ovs_lock(); | |
a94ebc39 | 1174 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1175 | if (unlikely(!dp)) { |
1176 | error = -ENODEV; | |
0c9fd022 | 1177 | goto err_unlock_ovs; |
6740b721 | 1178 | } |
0c9fd022 | 1179 | /* Check that the flow exists. */ |
bc619e29 JS |
1180 | if (ufid_present) |
1181 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1182 | else | |
1183 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1184 | if (unlikely(!flow)) { |
1185 | error = -ENOENT; | |
0c9fd022 | 1186 | goto err_unlock_ovs; |
6740b721 | 1187 | } |
3440e4bc | 1188 | |
0c9fd022 | 1189 | /* Update actions, if present. */ |
6740b721 | 1190 | if (likely(acts)) { |
0c9fd022 JR |
1191 | old_acts = ovsl_dereference(flow->sf_acts); |
1192 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1193 | |
1194 | if (unlikely(reply)) { | |
2c622e5a | 1195 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1196 | ovs_header->dp_ifindex, |
1197 | reply, info->snd_portid, | |
1198 | info->snd_seq, 0, | |
bc619e29 JS |
1199 | OVS_FLOW_CMD_NEW, |
1200 | ufid_flags); | |
6740b721 JR |
1201 | BUG_ON(error < 0); |
1202 | } | |
1203 | } else { | |
1204 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1205 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
bc619e29 JS |
1206 | info, OVS_FLOW_CMD_NEW, false, |
1207 | ufid_flags); | |
1208 | ||
6740b721 JR |
1209 | if (unlikely(IS_ERR(reply))) { |
1210 | error = PTR_ERR(reply); | |
1211 | goto err_unlock_ovs; | |
1212 | } | |
9c52546b | 1213 | } |
0c9fd022 | 1214 | |
0c9fd022 JR |
1215 | /* Clear stats. */ |
1216 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1217 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1218 | ovs_unlock(); |
37a1300c | 1219 | |
6740b721 | 1220 | if (reply) |
cb25142c | 1221 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 | 1222 | if (old_acts) |
e23775f2 | 1223 | ovs_nla_free_flow_actions_rcu(old_acts); |
7d16c847 | 1224 | |
d6569377 | 1225 | return 0; |
704a1e09 | 1226 | |
cd2a59e9 PS |
1227 | err_unlock_ovs: |
1228 | ovs_unlock(); | |
6740b721 JR |
1229 | kfree_skb(reply); |
1230 | err_kfree_acts: | |
e23775f2 | 1231 | ovs_nla_free_flow_actions(acts); |
37a1300c | 1232 | error: |
9c52546b | 1233 | return error; |
704a1e09 BP |
1234 | } |
1235 | ||
df2c07f4 | 1236 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1237 | { |
37a1300c | 1238 | struct nlattr **a = info->attrs; |
df2c07f4 | 1239 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1240 | struct net *net = sock_net(skb->sk); |
37a1300c | 1241 | struct sw_flow_key key; |
37a1300c | 1242 | struct sk_buff *reply; |
704a1e09 | 1243 | struct sw_flow *flow; |
9c52546b | 1244 | struct datapath *dp; |
a1c564be | 1245 | struct sw_flow_match match; |
bc619e29 JS |
1246 | struct sw_flow_id ufid; |
1247 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1248 | int err = 0; | |
9233cef7 | 1249 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1250 | bool ufid_present; |
704a1e09 | 1251 | |
bc619e29 JS |
1252 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1253 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1254 | ovs_match_init(&match, &key, true, NULL); |
038e34ab | 1255 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
bc619e29 JS |
1256 | log); |
1257 | } else if (!ufid_present) { | |
9233cef7 JR |
1258 | OVS_NLERR(log, |
1259 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1260 | err = -EINVAL; |
1b936472 | 1261 | } |
37a1300c BP |
1262 | if (err) |
1263 | return err; | |
704a1e09 | 1264 | |
cd2a59e9 | 1265 | ovs_lock(); |
2a4999f3 | 1266 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1267 | if (!dp) { |
1268 | err = -ENODEV; | |
1269 | goto unlock; | |
1270 | } | |
704a1e09 | 1271 | |
bc619e29 JS |
1272 | if (ufid_present) |
1273 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1274 | else | |
1275 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1276 | if (!flow) { |
cd2a59e9 PS |
1277 | err = -ENOENT; |
1278 | goto unlock; | |
1279 | } | |
d6569377 | 1280 | |
7d16c847 | 1281 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
bc619e29 | 1282 | OVS_FLOW_CMD_NEW, true, ufid_flags); |
cd2a59e9 PS |
1283 | if (IS_ERR(reply)) { |
1284 | err = PTR_ERR(reply); | |
1285 | goto unlock; | |
1286 | } | |
36956a7d | 1287 | |
cd2a59e9 | 1288 | ovs_unlock(); |
37a1300c | 1289 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1290 | unlock: |
1291 | ovs_unlock(); | |
1292 | return err; | |
d6569377 | 1293 | } |
9c52546b | 1294 | |
df2c07f4 | 1295 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1296 | { |
37a1300c | 1297 | struct nlattr **a = info->attrs; |
df2c07f4 | 1298 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1299 | struct net *net = sock_net(skb->sk); |
37a1300c | 1300 | struct sw_flow_key key; |
37a1300c | 1301 | struct sk_buff *reply; |
bc619e29 | 1302 | struct sw_flow *flow = NULL; |
d6569377 | 1303 | struct datapath *dp; |
a1c564be | 1304 | struct sw_flow_match match; |
bc619e29 JS |
1305 | struct sw_flow_id ufid; |
1306 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1307 | int err; |
9233cef7 | 1308 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1309 | bool ufid_present; |
36956a7d | 1310 | |
bc619e29 JS |
1311 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1312 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1313 | ovs_match_init(&match, &key, true, NULL); |
038e34ab JS |
1314 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1315 | NULL, log); | |
cde7f3ba JR |
1316 | if (unlikely(err)) |
1317 | return err; | |
1318 | } | |
1319 | ||
cd2a59e9 | 1320 | ovs_lock(); |
2a4999f3 | 1321 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1322 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1323 | err = -ENODEV; |
1324 | goto unlock; | |
1325 | } | |
7d16c847 | 1326 | |
bc619e29 | 1327 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1328 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1329 | goto unlock; |
1330 | } | |
7d16c847 | 1331 | |
bc619e29 JS |
1332 | if (ufid_present) |
1333 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1334 | else | |
1335 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1336 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1337 | err = -ENOENT; |
1338 | goto unlock; | |
1339 | } | |
d6569377 | 1340 | |
994dc286 | 1341 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1342 | ovs_unlock(); |
37a1300c | 1343 | |
46051cf8 | 1344 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1345 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1346 | |
1347 | if (likely(reply)) { | |
1348 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1349 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1350 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1351 | reply, info->snd_portid, |
1352 | info->snd_seq, 0, | |
bc619e29 JS |
1353 | OVS_FLOW_CMD_DEL, |
1354 | ufid_flags); | |
cde7f3ba JR |
1355 | rcu_read_unlock(); |
1356 | BUG_ON(err < 0); | |
cb25142c | 1357 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1358 | } else { |
cb25142c PS |
1359 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1360 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1361 | ||
cde7f3ba | 1362 | } |
afad3556 | 1363 | } |
37a1300c | 1364 | |
a1c564be | 1365 | ovs_flow_free(flow, true); |
37a1300c | 1366 | return 0; |
cd2a59e9 PS |
1367 | unlock: |
1368 | ovs_unlock(); | |
1369 | return err; | |
37a1300c BP |
1370 | } |
1371 | ||
df2c07f4 | 1372 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1373 | { |
bc619e29 | 1374 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1375 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1376 | struct table_instance *ti; |
37a1300c | 1377 | struct datapath *dp; |
bc619e29 JS |
1378 | u32 ufid_flags; |
1379 | int err; | |
1380 | ||
1381 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
15702dc9 | 1382 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); |
bc619e29 JS |
1383 | if (err) |
1384 | return err; | |
1385 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1386 | |
f44ccce1 | 1387 | rcu_read_lock(); |
01ac0970 | 1388 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1389 | if (!dp) { |
f44ccce1 | 1390 | rcu_read_unlock(); |
37a1300c | 1391 | return -ENODEV; |
cd2a59e9 | 1392 | } |
37a1300c | 1393 | |
994dc286 | 1394 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1395 | for (;;) { |
37a1300c BP |
1396 | struct sw_flow *flow; |
1397 | u32 bucket, obj; | |
1398 | ||
1399 | bucket = cb->args[0]; | |
1400 | obj = cb->args[1]; | |
994dc286 | 1401 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1402 | if (!flow) |
37a1300c BP |
1403 | break; |
1404 | ||
2c622e5a | 1405 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1406 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1407 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
bc619e29 | 1408 | OVS_FLOW_CMD_NEW, ufid_flags) < 0) |
37a1300c BP |
1409 | break; |
1410 | ||
1411 | cb->args[0] = bucket; | |
1412 | cb->args[1] = obj; | |
1413 | } | |
f44ccce1 | 1414 | rcu_read_unlock(); |
37a1300c | 1415 | return skb->len; |
704a1e09 BP |
1416 | } |
1417 | ||
cb25142c PS |
1418 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1419 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1420 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1421 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1422 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1423 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1424 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1425 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1426 | }; |
1427 | ||
18fd3a52 | 1428 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1429 | { .cmd = OVS_FLOW_CMD_NEW, |
a6a8674d | 1430 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1431 | .policy = flow_policy, |
0c9fd022 | 1432 | .doit = ovs_flow_cmd_new |
37a1300c | 1433 | }, |
df2c07f4 | 1434 | { .cmd = OVS_FLOW_CMD_DEL, |
a6a8674d | 1435 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1436 | .policy = flow_policy, |
df2c07f4 | 1437 | .doit = ovs_flow_cmd_del |
37a1300c | 1438 | }, |
df2c07f4 | 1439 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1440 | .flags = 0, /* OK for unprivileged users. */ |
1441 | .policy = flow_policy, | |
df2c07f4 JP |
1442 | .doit = ovs_flow_cmd_get, |
1443 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1444 | }, |
df2c07f4 | 1445 | { .cmd = OVS_FLOW_CMD_SET, |
a6a8674d | 1446 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1447 | .policy = flow_policy, |
0c9fd022 | 1448 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1449 | }, |
1450 | }; | |
1451 | ||
ba63fe26 | 1452 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
df2c07f4 | 1453 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1454 | .name = OVS_FLOW_FAMILY, |
1455 | .version = OVS_FLOW_VERSION, | |
1456 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1457 | .netnsok = true, |
cb25142c PS |
1458 | .parallel_ops = true, |
1459 | .ops = dp_flow_genl_ops, | |
1460 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1461 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1462 | .n_mcgrps = 1, | |
ba63fe26 | 1463 | .module = THIS_MODULE, |
aaff4b55 BP |
1464 | }; |
1465 | ||
0afa2373 TG |
1466 | static size_t ovs_dp_cmd_msg_size(void) |
1467 | { | |
1468 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1469 | ||
1470 | msgsize += nla_total_size(IFNAMSIZ); | |
91b37647 PS |
1471 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1472 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
300af20a | 1473 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1474 | |
1475 | return msgsize; | |
1476 | } | |
1477 | ||
d637497c | 1478 | /* Called with ovs_mutex. */ |
df2c07f4 | 1479 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1480 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1481 | { |
df2c07f4 | 1482 | struct ovs_header *ovs_header; |
e926dfe3 | 1483 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1484 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1485 | int err; |
1486 | ||
28aea917 | 1487 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1488 | flags, cmd); |
df2c07f4 | 1489 | if (!ovs_header) |
aaff4b55 | 1490 | goto error; |
064af421 | 1491 | |
b063d9f0 | 1492 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1493 | |
850b6b3b | 1494 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1495 | if (err) |
d6569377 | 1496 | goto nla_put_failure; |
064af421 | 1497 | |
4fa72a95 | 1498 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
91b37647 PS |
1499 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1500 | &dp_stats, OVS_DP_ATTR_PAD)) | |
4fa72a95 AZ |
1501 | goto nla_put_failure; |
1502 | ||
91b37647 PS |
1503 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1504 | sizeof(struct ovs_dp_megaflow_stats), | |
1505 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
c3cc8c03 | 1506 | goto nla_put_failure; |
d6569377 | 1507 | |
c58cc9a4 TG |
1508 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1509 | goto nla_put_failure; | |
1510 | ||
23b48dc1 TG |
1511 | genlmsg_end(skb, ovs_header); |
1512 | return 0; | |
d6569377 BP |
1513 | |
1514 | nla_put_failure: | |
df2c07f4 | 1515 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1516 | error: |
1517 | return -EMSGSIZE; | |
d6569377 BP |
1518 | } |
1519 | ||
40c08cda | 1520 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
d6569377 | 1521 | { |
40c08cda | 1522 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
aaff4b55 | 1523 | } |
9dca7bd5 | 1524 | |
aa917006 | 1525 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1526 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1527 | const struct ovs_header *ovs_header, |
6455100f | 1528 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1529 | { |
254f2dc8 BP |
1530 | struct datapath *dp; |
1531 | ||
df2c07f4 | 1532 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1533 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1534 | else { |
d6569377 | 1535 | struct vport *vport; |
d6569377 | 1536 | |
2a4999f3 | 1537 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1538 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1539 | } |
254f2dc8 | 1540 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1541 | } |
1542 | ||
94358dcf TG |
1543 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1544 | { | |
1545 | struct datapath *dp; | |
1546 | ||
1547 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1548 | if (IS_ERR(dp)) |
94358dcf TG |
1549 | return; |
1550 | ||
1551 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1552 | dp->user_features = 0; | |
1553 | } | |
1554 | ||
f1f60b85 | 1555 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1556 | { |
1557 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1558 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1559 | } | |
1560 | ||
df2c07f4 | 1561 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1562 | { |
aaff4b55 | 1563 | struct nlattr **a = info->attrs; |
d6569377 | 1564 | struct vport_parms parms; |
aaff4b55 | 1565 | struct sk_buff *reply; |
d6569377 BP |
1566 | struct datapath *dp; |
1567 | struct vport *vport; | |
2a4999f3 | 1568 | struct ovs_net *ovs_net; |
95b1d73a | 1569 | int err, i; |
d6569377 | 1570 | |
d6569377 | 1571 | err = -EINVAL; |
ea36840f | 1572 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1573 | goto err; |
1574 | ||
40c08cda | 1575 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1576 | if (!reply) |
1577 | return -ENOMEM; | |
d6569377 | 1578 | |
d6569377 BP |
1579 | err = -ENOMEM; |
1580 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1581 | if (dp == NULL) | |
d81eef1b | 1582 | goto err_free_reply; |
2a4999f3 | 1583 | |
c0cddcec | 1584 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
0ceaa66c | 1585 | |
d6569377 | 1586 | /* Allocate table. */ |
994dc286 PS |
1587 | err = ovs_flow_tbl_init(&dp->table); |
1588 | if (err) | |
d6569377 BP |
1589 | goto err_free_dp; |
1590 | ||
08fb1bbd | 1591 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1592 | if (!dp->stats_percpu) { |
1593 | err = -ENOMEM; | |
1594 | goto err_destroy_table; | |
1595 | } | |
1596 | ||
95b1d73a PS |
1597 | dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
1598 | GFP_KERNEL); | |
1599 | if (!dp->ports) { | |
1600 | err = -ENOMEM; | |
1601 | goto err_destroy_percpu; | |
1602 | } | |
1603 | ||
1604 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1605 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1606 | ||
1cb57039 AZ |
1607 | err = ovs_meters_init(dp); |
1608 | if (err) | |
1609 | goto err_destroy_ports_array; | |
1610 | ||
d6569377 | 1611 | /* Set up our datapath device. */ |
df2c07f4 JP |
1612 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1613 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1614 | parms.options = NULL; |
1615 | parms.dp = dp; | |
df2c07f4 | 1616 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1617 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1618 | |
c58cc9a4 TG |
1619 | ovs_dp_change(dp, a); |
1620 | ||
d81eef1b JR |
1621 | /* So far only local changes have been made, now need the lock. */ |
1622 | ovs_lock(); | |
1623 | ||
d6569377 BP |
1624 | vport = new_vport(&parms); |
1625 | if (IS_ERR(vport)) { | |
1626 | err = PTR_ERR(vport); | |
1627 | if (err == -EBUSY) | |
1628 | err = -EEXIST; | |
1629 | ||
94358dcf TG |
1630 | if (err == -EEXIST) { |
1631 | /* An outdated user space instance that does not understand | |
1632 | * the concept of user_features has attempted to create a new | |
1633 | * datapath and is likely to reuse it. Drop all user features. | |
1634 | */ | |
1635 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1636 | ovs_dp_reset_user_features(skb, info); | |
1637 | } | |
1638 | ||
1cb57039 | 1639 | goto err_destroy_meters; |
d6569377 | 1640 | } |
d6569377 | 1641 | |
d81eef1b JR |
1642 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1643 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1644 | BUG_ON(err < 0); | |
aaff4b55 | 1645 | |
2a4999f3 | 1646 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1647 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
a0fb56c1 | 1648 | |
cd2a59e9 | 1649 | ovs_unlock(); |
d6569377 | 1650 | |
cb25142c | 1651 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1652 | return 0; |
1653 | ||
1cb57039 | 1654 | err_destroy_meters: |
d81eef1b | 1655 | ovs_unlock(); |
1cb57039 AZ |
1656 | ovs_meters_exit(dp); |
1657 | err_destroy_ports_array: | |
95b1d73a | 1658 | kfree(dp->ports); |
99769a40 JG |
1659 | err_destroy_percpu: |
1660 | free_percpu(dp->stats_percpu); | |
d6569377 | 1661 | err_destroy_table: |
e379e4d1 | 1662 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1663 | err_free_dp: |
d6569377 | 1664 | kfree(dp); |
d81eef1b JR |
1665 | err_free_reply: |
1666 | kfree_skb(reply); | |
d6569377 | 1667 | err: |
064af421 BP |
1668 | return err; |
1669 | } | |
1670 | ||
cd2a59e9 | 1671 | /* Called with ovs_mutex. */ |
2a4999f3 | 1672 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1673 | { |
95b1d73a | 1674 | int i; |
44e05eca | 1675 | |
95b1d73a PS |
1676 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1677 | struct vport *vport; | |
f8dfbcb7 | 1678 | struct hlist_node *n; |
95b1d73a | 1679 | |
f8dfbcb7 | 1680 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1681 | if (vport->port_no != OVSP_LOCAL) |
1682 | ovs_dp_detach_port(vport); | |
1683 | } | |
ed099e92 | 1684 | |
fb93e9aa | 1685 | list_del_rcu(&dp->list_node); |
ed099e92 | 1686 | |
cd2a59e9 | 1687 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1688 | * all ports in datapath are destroyed first before freeing datapath. |
1689 | */ | |
cd2a59e9 | 1690 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1691 | |
d103f479 | 1692 | /* RCU destroy the flow table */ |
ed099e92 | 1693 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1694 | } |
1695 | ||
1696 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1697 | { | |
1698 | struct sk_buff *reply; | |
1699 | struct datapath *dp; | |
1700 | int err; | |
1701 | ||
40c08cda | 1702 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1703 | if (!reply) |
1704 | return -ENOMEM; | |
1705 | ||
cd2a59e9 | 1706 | ovs_lock(); |
2a4999f3 PS |
1707 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1708 | err = PTR_ERR(dp); | |
1709 | if (IS_ERR(dp)) | |
d81eef1b | 1710 | goto err_unlock_free; |
2a4999f3 | 1711 | |
d81eef1b JR |
1712 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1713 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1714 | BUG_ON(err < 0); | |
2a4999f3 PS |
1715 | |
1716 | __dp_destroy(dp); | |
d81eef1b | 1717 | ovs_unlock(); |
7d16c847 | 1718 | |
cb25142c | 1719 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1720 | return 0; |
d81eef1b JR |
1721 | |
1722 | err_unlock_free: | |
cd2a59e9 | 1723 | ovs_unlock(); |
d81eef1b | 1724 | kfree_skb(reply); |
cd2a59e9 | 1725 | return err; |
44e05eca BP |
1726 | } |
1727 | ||
df2c07f4 | 1728 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1729 | { |
aaff4b55 | 1730 | struct sk_buff *reply; |
d6569377 | 1731 | struct datapath *dp; |
d6569377 | 1732 | int err; |
064af421 | 1733 | |
40c08cda | 1734 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1735 | if (!reply) |
1736 | return -ENOMEM; | |
1737 | ||
cd2a59e9 | 1738 | ovs_lock(); |
2a4999f3 | 1739 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1740 | err = PTR_ERR(dp); |
d6569377 | 1741 | if (IS_ERR(dp)) |
d81eef1b | 1742 | goto err_unlock_free; |
38c6ecbc | 1743 | |
c58cc9a4 TG |
1744 | ovs_dp_change(dp, info->attrs); |
1745 | ||
d81eef1b JR |
1746 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1747 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1748 | BUG_ON(err < 0); | |
a0fb56c1 | 1749 | |
cd2a59e9 | 1750 | ovs_unlock(); |
7d16c847 | 1751 | |
cb25142c | 1752 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1753 | return 0; |
d81eef1b JR |
1754 | |
1755 | err_unlock_free: | |
cd2a59e9 | 1756 | ovs_unlock(); |
d81eef1b | 1757 | kfree_skb(reply); |
cd2a59e9 | 1758 | return err; |
064af421 BP |
1759 | } |
1760 | ||
df2c07f4 | 1761 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1762 | { |
aaff4b55 | 1763 | struct sk_buff *reply; |
d6569377 | 1764 | struct datapath *dp; |
d6569377 | 1765 | int err; |
1dcf111b | 1766 | |
40c08cda | 1767 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1768 | if (!reply) |
1769 | return -ENOMEM; | |
1770 | ||
d637497c | 1771 | ovs_lock(); |
2a4999f3 | 1772 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1773 | if (IS_ERR(dp)) { |
1774 | err = PTR_ERR(dp); | |
d81eef1b | 1775 | goto err_unlock_free; |
cd2a59e9 | 1776 | } |
d81eef1b JR |
1777 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1778 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1779 | BUG_ON(err < 0); | |
d637497c | 1780 | ovs_unlock(); |
aaff4b55 BP |
1781 | |
1782 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1783 | |
d81eef1b | 1784 | err_unlock_free: |
d637497c | 1785 | ovs_unlock(); |
d81eef1b | 1786 | kfree_skb(reply); |
cd2a59e9 | 1787 | return err; |
1dcf111b JP |
1788 | } |
1789 | ||
df2c07f4 | 1790 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1791 | { |
2a4999f3 | 1792 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1793 | struct datapath *dp; |
1794 | int skip = cb->args[0]; | |
1795 | int i = 0; | |
a7786963 | 1796 | |
d637497c PS |
1797 | ovs_lock(); |
1798 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1799 | if (i >= skip && |
28aea917 | 1800 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1801 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1802 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1803 | break; |
254f2dc8 | 1804 | i++; |
a7786963 | 1805 | } |
d637497c | 1806 | ovs_unlock(); |
aaff4b55 | 1807 | |
254f2dc8 BP |
1808 | cb->args[0] = i; |
1809 | ||
aaff4b55 | 1810 | return skb->len; |
c19e6535 BP |
1811 | } |
1812 | ||
cb25142c PS |
1813 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1814 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1815 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1816 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1817 | }; | |
1818 | ||
18fd3a52 | 1819 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1820 | { .cmd = OVS_DP_CMD_NEW, |
a6a8674d | 1821 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1822 | .policy = datapath_policy, |
df2c07f4 | 1823 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1824 | }, |
df2c07f4 | 1825 | { .cmd = OVS_DP_CMD_DEL, |
a6a8674d | 1826 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1827 | .policy = datapath_policy, |
df2c07f4 | 1828 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1829 | }, |
df2c07f4 | 1830 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1831 | .flags = 0, /* OK for unprivileged users. */ |
1832 | .policy = datapath_policy, | |
df2c07f4 JP |
1833 | .doit = ovs_dp_cmd_get, |
1834 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1835 | }, |
df2c07f4 | 1836 | { .cmd = OVS_DP_CMD_SET, |
a6a8674d | 1837 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1838 | .policy = datapath_policy, |
df2c07f4 | 1839 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1840 | }, |
1841 | }; | |
1842 | ||
ba63fe26 | 1843 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
df2c07f4 | 1844 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1845 | .name = OVS_DATAPATH_FAMILY, |
1846 | .version = OVS_DATAPATH_VERSION, | |
1847 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1848 | .netnsok = true, |
cb25142c PS |
1849 | .parallel_ops = true, |
1850 | .ops = dp_datapath_genl_ops, | |
1851 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1852 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1853 | .n_mcgrps = 1, | |
ba63fe26 | 1854 | .module = THIS_MODULE, |
f0fef760 BP |
1855 | }; |
1856 | ||
cd2a59e9 | 1857 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1858 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
b147f2e9 JB |
1859 | struct net *net, u32 portid, u32 seq, |
1860 | u32 flags, u8 cmd) | |
064af421 | 1861 | { |
df2c07f4 | 1862 | struct ovs_header *ovs_header; |
e926dfe3 | 1863 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1864 | int err; |
1865 | ||
28aea917 | 1866 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1867 | flags, cmd); |
df2c07f4 | 1868 | if (!ovs_header) |
f0fef760 | 1869 | return -EMSGSIZE; |
c19e6535 | 1870 | |
99769a40 | 1871 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1872 | |
c3cc8c03 DM |
1873 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1874 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
e23775f2 | 1875 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
b147f2e9 JB |
1876 | ovs_vport_name(vport)) || |
1877 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
c3cc8c03 | 1878 | goto nla_put_failure; |
c19e6535 | 1879 | |
b147f2e9 JB |
1880 | #ifdef HAVE_PEERNET2ID_ALLOC |
1881 | if (!net_eq(net, dev_net(vport->dev))) { | |
1882 | int id = peernet2id_alloc(net, dev_net(vport->dev)); | |
1883 | ||
1884 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1885 | goto nla_put_failure; | |
1886 | } | |
1887 | ||
1888 | #endif | |
850b6b3b | 1889 | ovs_vport_get_stats(vport, &vport_stats); |
91b37647 PS |
1890 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1891 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1892 | OVS_VPORT_ATTR_PAD)) | |
c3cc8c03 | 1893 | goto nla_put_failure; |
c19e6535 | 1894 | |
beb1c69a AW |
1895 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1896 | goto nla_put_failure; | |
1897 | ||
850b6b3b | 1898 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1899 | if (err == -EMSGSIZE) |
1900 | goto error; | |
c19e6535 | 1901 | |
23b48dc1 TG |
1902 | genlmsg_end(skb, ovs_header); |
1903 | return 0; | |
c19e6535 BP |
1904 | |
1905 | nla_put_failure: | |
1906 | err = -EMSGSIZE; | |
f0fef760 | 1907 | error: |
df2c07f4 | 1908 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1909 | return err; |
064af421 BP |
1910 | } |
1911 | ||
d81eef1b JR |
1912 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1913 | { | |
1914 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1915 | } | |
1916 | ||
1917 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
b147f2e9 JB |
1918 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1919 | u32 portid, u32 seq, u8 cmd) | |
064af421 | 1920 | { |
c19e6535 | 1921 | struct sk_buff *skb; |
f0fef760 | 1922 | int retval; |
c19e6535 | 1923 | |
f0fef760 | 1924 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1925 | if (!skb) |
1926 | return ERR_PTR(-ENOMEM); | |
1927 | ||
b147f2e9 | 1928 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd); |
c25ea534 JG |
1929 | BUG_ON(retval < 0); |
1930 | ||
c19e6535 | 1931 | return skb; |
f0fef760 | 1932 | } |
c19e6535 | 1933 | |
cd2a59e9 | 1934 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1935 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1936 | const struct ovs_header *ovs_header, |
df2c07f4 | 1937 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1938 | { |
1939 | struct datapath *dp; | |
1940 | struct vport *vport; | |
1941 | ||
b147f2e9 JB |
1942 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1943 | return ERR_PTR(-EOPNOTSUPP); | |
df2c07f4 | 1944 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1945 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1946 | if (!vport) |
c19e6535 | 1947 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1948 | if (ovs_header->dp_ifindex && |
1949 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1950 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1951 | return vport; |
df2c07f4 JP |
1952 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1953 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1954 | |
1955 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1956 | return ERR_PTR(-EFBIG); |
c19e6535 | 1957 | |
2a4999f3 | 1958 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1959 | if (!dp) |
1960 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1961 | |
cd2a59e9 | 1962 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1963 | if (!vport) |
17535c57 | 1964 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1965 | return vport; |
1966 | } else | |
1967 | return ERR_PTR(-EINVAL); | |
b147f2e9 | 1968 | |
064af421 BP |
1969 | } |
1970 | ||
8ce37339 PS |
1971 | /* Called with ovs_mutex */ |
1972 | static void update_headroom(struct datapath *dp) | |
1973 | { | |
1974 | unsigned dev_headroom, max_headroom = 0; | |
1975 | struct net_device *dev; | |
1976 | struct vport *vport; | |
1977 | int i; | |
1978 | ||
1979 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1980 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1981 | dev = vport->dev; | |
1982 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1983 | if (dev_headroom > max_headroom) | |
1984 | max_headroom = dev_headroom; | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | dp->max_headroom = max_headroom; | |
1989 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1990 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
1991 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
1992 | } | |
1993 | ||
df2c07f4 | 1994 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1995 | { |
f0fef760 | 1996 | struct nlattr **a = info->attrs; |
df2c07f4 | 1997 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1998 | struct vport_parms parms; |
ed099e92 | 1999 | struct sk_buff *reply; |
c19e6535 | 2000 | struct vport *vport; |
c19e6535 | 2001 | struct datapath *dp; |
b0ec0f27 | 2002 | u32 port_no; |
c19e6535 | 2003 | int err; |
b0ec0f27 | 2004 | |
ea36840f BP |
2005 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2006 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b | 2007 | return -EINVAL; |
b147f2e9 JB |
2008 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2009 | return -EOPNOTSUPP; | |
d81eef1b JR |
2010 | |
2011 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2012 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2013 | if (port_no >= DP_MAX_PORTS) | |
2014 | return -EFBIG; | |
2015 | ||
2016 | reply = ovs_vport_cmd_alloc_info(); | |
2017 | if (!reply) | |
2018 | return -ENOMEM; | |
f0fef760 | 2019 | |
cd2a59e9 | 2020 | ovs_lock(); |
5a38795f | 2021 | restart: |
2a4999f3 | 2022 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
2023 | err = -ENODEV; |
2024 | if (!dp) | |
d81eef1b | 2025 | goto exit_unlock_free; |
c19e6535 | 2026 | |
d81eef1b | 2027 | if (port_no) { |
cd2a59e9 | 2028 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2029 | err = -EBUSY; |
2030 | if (vport) | |
d81eef1b | 2031 | goto exit_unlock_free; |
c19e6535 BP |
2032 | } else { |
2033 | for (port_no = 1; ; port_no++) { | |
2034 | if (port_no >= DP_MAX_PORTS) { | |
2035 | err = -EFBIG; | |
d81eef1b | 2036 | goto exit_unlock_free; |
c19e6535 | 2037 | } |
cd2a59e9 | 2038 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2039 | if (!vport) |
2040 | break; | |
51d4d598 | 2041 | } |
064af421 | 2042 | } |
b0ec0f27 | 2043 | |
df2c07f4 JP |
2044 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2045 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2046 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2047 | parms.dp = dp; |
2048 | parms.port_no = port_no; | |
beb1c69a | 2049 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
2050 | |
2051 | vport = new_vport(&parms); | |
2052 | err = PTR_ERR(vport); | |
5a38795f TG |
2053 | if (IS_ERR(vport)) { |
2054 | if (err == -EAGAIN) | |
2055 | goto restart; | |
d81eef1b | 2056 | goto exit_unlock_free; |
5a38795f | 2057 | } |
c19e6535 | 2058 | |
b147f2e9 JB |
2059 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2060 | info->snd_portid, info->snd_seq, 0, | |
2061 | OVS_VPORT_CMD_NEW); | |
d81eef1b | 2062 | BUG_ON(err < 0); |
8ce37339 PS |
2063 | |
2064 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2065 | update_headroom(dp); | |
2066 | else | |
2067 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2068 | ||
d81eef1b | 2069 | ovs_unlock(); |
e297c6b7 | 2070 | |
cb25142c | 2071 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2072 | return 0; |
c19e6535 | 2073 | |
d81eef1b | 2074 | exit_unlock_free: |
cd2a59e9 | 2075 | ovs_unlock(); |
d81eef1b | 2076 | kfree_skb(reply); |
c19e6535 | 2077 | return err; |
44e05eca BP |
2078 | } |
2079 | ||
df2c07f4 | 2080 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2081 | { |
f0fef760 BP |
2082 | struct nlattr **a = info->attrs; |
2083 | struct sk_buff *reply; | |
c19e6535 | 2084 | struct vport *vport; |
c19e6535 | 2085 | int err; |
44e05eca | 2086 | |
d81eef1b JR |
2087 | reply = ovs_vport_cmd_alloc_info(); |
2088 | if (!reply) | |
2089 | return -ENOMEM; | |
2090 | ||
cd2a59e9 | 2091 | ovs_lock(); |
2a4999f3 | 2092 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2093 | err = PTR_ERR(vport); |
2094 | if (IS_ERR(vport)) | |
d81eef1b | 2095 | goto exit_unlock_free; |
44e05eca | 2096 | |
6455100f | 2097 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2098 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2099 | err = -EINVAL; |
d81eef1b | 2100 | goto exit_unlock_free; |
c25ea534 JG |
2101 | } |
2102 | ||
17ec1d04 | 2103 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2104 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 2105 | if (err) |
d81eef1b | 2106 | goto exit_unlock_free; |
17ec1d04 | 2107 | } |
1fc7083d | 2108 | |
beb1c69a | 2109 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
2110 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
2111 | ||
2112 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
2113 | if (err) |
2114 | goto exit_unlock_free; | |
2115 | } | |
c19e6535 | 2116 | |
b147f2e9 JB |
2117 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2118 | info->snd_portid, info->snd_seq, 0, | |
2119 | OVS_VPORT_CMD_NEW); | |
c25ea534 | 2120 | BUG_ON(err < 0); |
cd2a59e9 | 2121 | ovs_unlock(); |
d81eef1b | 2122 | |
cb25142c | 2123 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2124 | return 0; |
2125 | ||
d81eef1b | 2126 | exit_unlock_free: |
cd2a59e9 | 2127 | ovs_unlock(); |
d81eef1b | 2128 | kfree_skb(reply); |
c19e6535 | 2129 | return err; |
064af421 BP |
2130 | } |
2131 | ||
df2c07f4 | 2132 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2133 | { |
8ce37339 | 2134 | bool must_update_headroom = false; |
f0fef760 BP |
2135 | struct nlattr **a = info->attrs; |
2136 | struct sk_buff *reply; | |
8ce37339 | 2137 | struct datapath *dp; |
c19e6535 | 2138 | struct vport *vport; |
c19e6535 BP |
2139 | int err; |
2140 | ||
d81eef1b JR |
2141 | reply = ovs_vport_cmd_alloc_info(); |
2142 | if (!reply) | |
2143 | return -ENOMEM; | |
2144 | ||
cd2a59e9 | 2145 | ovs_lock(); |
2a4999f3 | 2146 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2147 | err = PTR_ERR(vport); |
f0fef760 | 2148 | if (IS_ERR(vport)) |
d81eef1b | 2149 | goto exit_unlock_free; |
c19e6535 | 2150 | |
df2c07f4 | 2151 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2152 | err = -EINVAL; |
d81eef1b | 2153 | goto exit_unlock_free; |
f0fef760 BP |
2154 | } |
2155 | ||
b147f2e9 JB |
2156 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2157 | info->snd_portid, info->snd_seq, 0, | |
2158 | OVS_VPORT_CMD_DEL); | |
d81eef1b | 2159 | BUG_ON(err < 0); |
8ce37339 PS |
2160 | |
2161 | /* the vport deletion may trigger dp headroom update */ | |
2162 | dp = vport->dp; | |
2163 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2164 | must_update_headroom = true; | |
2165 | netdev_reset_rx_headroom(vport->dev); | |
850b6b3b | 2166 | ovs_dp_detach_port(vport); |
8ce37339 PS |
2167 | |
2168 | if (must_update_headroom) | |
2169 | update_headroom(dp); | |
2170 | ||
d81eef1b | 2171 | ovs_unlock(); |
f0fef760 | 2172 | |
cb25142c | 2173 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2174 | return 0; |
f0fef760 | 2175 | |
d81eef1b | 2176 | exit_unlock_free: |
cd2a59e9 | 2177 | ovs_unlock(); |
d81eef1b | 2178 | kfree_skb(reply); |
c19e6535 | 2179 | return err; |
7c40efc9 BP |
2180 | } |
2181 | ||
df2c07f4 | 2182 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2183 | { |
f0fef760 | 2184 | struct nlattr **a = info->attrs; |
df2c07f4 | 2185 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2186 | struct sk_buff *reply; |
c19e6535 | 2187 | struct vport *vport; |
c19e6535 BP |
2188 | int err; |
2189 | ||
d81eef1b JR |
2190 | reply = ovs_vport_cmd_alloc_info(); |
2191 | if (!reply) | |
2192 | return -ENOMEM; | |
2193 | ||
ed099e92 | 2194 | rcu_read_lock(); |
2a4999f3 | 2195 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2196 | err = PTR_ERR(vport); |
2197 | if (IS_ERR(vport)) | |
d81eef1b | 2198 | goto exit_unlock_free; |
b147f2e9 JB |
2199 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2200 | info->snd_portid, info->snd_seq, 0, | |
2201 | OVS_VPORT_CMD_NEW); | |
d81eef1b | 2202 | BUG_ON(err < 0); |
df2fa9b5 JG |
2203 | rcu_read_unlock(); |
2204 | ||
2205 | return genlmsg_reply(reply, info); | |
ed099e92 | 2206 | |
d81eef1b | 2207 | exit_unlock_free: |
ed099e92 | 2208 | rcu_read_unlock(); |
d81eef1b | 2209 | kfree_skb(reply); |
c19e6535 BP |
2210 | return err; |
2211 | } | |
2212 | ||
df2c07f4 | 2213 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2214 | { |
df2c07f4 | 2215 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2216 | struct datapath *dp; |
95b1d73a PS |
2217 | int bucket = cb->args[0], skip = cb->args[1]; |
2218 | int i, j = 0; | |
c19e6535 | 2219 | |
03fc2881 | 2220 | rcu_read_lock(); |
01ac0970 | 2221 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2222 | if (!dp) { |
2223 | rcu_read_unlock(); | |
f0fef760 | 2224 | return -ENODEV; |
03fc2881 | 2225 | } |
95b1d73a | 2226 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2227 | struct vport *vport; |
95b1d73a PS |
2228 | |
2229 | j = 0; | |
f8dfbcb7 | 2230 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2231 | if (j >= skip && |
2232 | ovs_vport_cmd_fill_info(vport, skb, | |
b147f2e9 | 2233 | sock_net(skb->sk), |
28aea917 | 2234 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2235 | cb->nlh->nlmsg_seq, |
2236 | NLM_F_MULTI, | |
2237 | OVS_VPORT_CMD_NEW) < 0) | |
2238 | goto out; | |
2239 | ||
2240 | j++; | |
2241 | } | |
2242 | skip = 0; | |
c19e6535 | 2243 | } |
95b1d73a | 2244 | out: |
ed099e92 | 2245 | rcu_read_unlock(); |
c19e6535 | 2246 | |
95b1d73a PS |
2247 | cb->args[0] = i; |
2248 | cb->args[1] = j; | |
f0fef760 | 2249 | |
95b1d73a | 2250 | return skb->len; |
7c40efc9 BP |
2251 | } |
2252 | ||
cb25142c PS |
2253 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2254 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2255 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2256 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2257 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
2258 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
2259 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, | |
b147f2e9 JB |
2260 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2261 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
cb25142c PS |
2262 | }; |
2263 | ||
18fd3a52 | 2264 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2265 | { .cmd = OVS_VPORT_CMD_NEW, |
a6a8674d | 2266 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2267 | .policy = vport_policy, |
df2c07f4 | 2268 | .doit = ovs_vport_cmd_new |
f0fef760 | 2269 | }, |
df2c07f4 | 2270 | { .cmd = OVS_VPORT_CMD_DEL, |
a6a8674d | 2271 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2272 | .policy = vport_policy, |
df2c07f4 | 2273 | .doit = ovs_vport_cmd_del |
f0fef760 | 2274 | }, |
df2c07f4 | 2275 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2276 | .flags = 0, /* OK for unprivileged users. */ |
2277 | .policy = vport_policy, | |
df2c07f4 JP |
2278 | .doit = ovs_vport_cmd_get, |
2279 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2280 | }, |
df2c07f4 | 2281 | { .cmd = OVS_VPORT_CMD_SET, |
a6a8674d | 2282 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2283 | .policy = vport_policy, |
df2c07f4 | 2284 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2285 | }, |
2286 | }; | |
2287 | ||
ba63fe26 | 2288 | struct genl_family dp_vport_genl_family __ro_after_init = { |
cb25142c PS |
2289 | .hdrsize = sizeof(struct ovs_header), |
2290 | .name = OVS_VPORT_FAMILY, | |
2291 | .version = OVS_VPORT_VERSION, | |
2292 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2293 | .netnsok = true, | |
2294 | .parallel_ops = true, | |
2295 | .ops = dp_vport_genl_ops, | |
2296 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2297 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2298 | .n_mcgrps = 1, | |
ba63fe26 | 2299 | .module = THIS_MODULE, |
982b8810 | 2300 | }; |
ed099e92 | 2301 | |
18fd3a52 | 2302 | static struct genl_family *dp_genl_families[] = { |
cb25142c PS |
2303 | &dp_datapath_genl_family, |
2304 | &dp_vport_genl_family, | |
2305 | &dp_flow_genl_family, | |
2306 | &dp_packet_genl_family, | |
1cb57039 | 2307 | &dp_meter_genl_family, |
982b8810 | 2308 | }; |
ed099e92 | 2309 | |
982b8810 BP |
2310 | static void dp_unregister_genl(int n_families) |
2311 | { | |
2312 | int i; | |
ed099e92 | 2313 | |
b867ca75 | 2314 | for (i = 0; i < n_families; i++) |
cb25142c | 2315 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2316 | } |
2317 | ||
ba63fe26 | 2318 | static int __init dp_register_genl(void) |
064af421 | 2319 | { |
982b8810 BP |
2320 | int err; |
2321 | int i; | |
064af421 | 2322 | |
982b8810 | 2323 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2324 | |
cb25142c | 2325 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2326 | if (err) |
2327 | goto error; | |
982b8810 | 2328 | } |
9cc8b4e4 | 2329 | |
982b8810 | 2330 | return 0; |
064af421 BP |
2331 | |
2332 | error: | |
cb25142c | 2333 | dp_unregister_genl(i); |
982b8810 | 2334 | return err; |
064af421 BP |
2335 | } |
2336 | ||
2a4999f3 PS |
2337 | static int __net_init ovs_init_net(struct net *net) |
2338 | { | |
2339 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2340 | ||
2341 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2342 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
038e34ab | 2343 | ovs_ct_init(net); |
7f4a5d68 | 2344 | ovs_netns_frags_init(net); |
2345 | ovs_netns_frags6_init(net); | |
2a4999f3 PS |
2346 | return 0; |
2347 | } | |
2348 | ||
cabd5516 PS |
2349 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2350 | struct list_head *head) | |
2a4999f3 PS |
2351 | { |
2352 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2353 | struct datapath *dp; |
2354 | ||
2355 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2356 | int i; | |
2357 | ||
2358 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2359 | struct vport *vport; | |
2360 | ||
2361 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
cabd5516 PS |
2362 | |
2363 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2364 | continue; | |
2365 | ||
e23775f2 | 2366 | if (dev_net(vport->dev) == dnet) |
cabd5516 PS |
2367 | list_add(&vport->detach_list, head); |
2368 | } | |
2369 | } | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2374 | { | |
2375 | struct datapath *dp, *dp_next; | |
2376 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2377 | struct vport *vport, *vport_next; | |
2378 | struct net *net; | |
2379 | LIST_HEAD(head); | |
2a4999f3 | 2380 | |
7f4a5d68 | 2381 | ovs_netns_frags6_exit(dnet); |
2382 | ovs_netns_frags_exit(dnet); | |
038e34ab | 2383 | ovs_ct_exit(dnet); |
cd2a59e9 PS |
2384 | ovs_lock(); |
2385 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2386 | __dp_destroy(dp); | |
cabd5516 | 2387 | |
3d10a0c8 YHW |
2388 | #ifdef HAVE_NET_RWSEM |
2389 | down_read(&net_rwsem); | |
2390 | #else | |
cabd5516 | 2391 | rtnl_lock(); |
3d10a0c8 | 2392 | #endif |
cabd5516 PS |
2393 | for_each_net(net) |
2394 | list_vports_from_net(net, dnet, &head); | |
3d10a0c8 YHW |
2395 | #ifdef HAVE_NET_RWSEM |
2396 | up_read(&net_rwsem); | |
2397 | #else | |
cabd5516 | 2398 | rtnl_unlock(); |
3d10a0c8 | 2399 | #endif |
cabd5516 PS |
2400 | |
2401 | /* Detach all vports from given namespace. */ | |
2402 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2403 | list_del(&vport->detach_list); | |
2404 | ovs_dp_detach_port(vport); | |
2405 | } | |
2406 | ||
cd2a59e9 PS |
2407 | ovs_unlock(); |
2408 | ||
2409 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2410 | } |
2411 | ||
2412 | static struct pernet_operations ovs_net_ops = { | |
2413 | .init = ovs_init_net, | |
2414 | .exit = ovs_exit_net, | |
2415 | .id = &ovs_net_id, | |
2416 | .size = sizeof(struct ovs_net), | |
2417 | }; | |
2418 | ||
22d24ebf BP |
2419 | static int __init dp_init(void) |
2420 | { | |
2421 | int err; | |
2422 | ||
f3d85db3 | 2423 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2424 | |
26bfaeaa | 2425 | pr_info("Open vSwitch switching datapath %s\n", VERSION); |
064af421 | 2426 | |
907c26a8 | 2427 | ovs_nsh_init(); |
595e069a JS |
2428 | err = action_fifos_init(); |
2429 | if (err) | |
7f4a5d68 | 2430 | goto error; |
595e069a | 2431 | |
5282e284 | 2432 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2433 | if (err) |
2434 | goto error_action_fifos_exit; | |
2435 | ||
5282e284 TG |
2436 | err = ovs_flow_init(); |
2437 | if (err) | |
2438 | goto error_unreg_rtnl_link; | |
2439 | ||
850b6b3b | 2440 | err = ovs_vport_init(); |
064af421 BP |
2441 | if (err) |
2442 | goto error_flow_exit; | |
2443 | ||
2a4999f3 | 2444 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2445 | if (err) |
2446 | goto error_vport_exit; | |
2447 | ||
7f4a5d68 | 2448 | err = compat_init(); |
2a4999f3 PS |
2449 | if (err) |
2450 | goto error_netns_exit; | |
2451 | ||
7f4a5d68 | 2452 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2453 | if (err) | |
2454 | goto error_compat_exit; | |
2455 | ||
5a38795f TG |
2456 | err = ovs_netdev_init(); |
2457 | if (err) | |
2458 | goto error_unreg_notifier; | |
2459 | ||
982b8810 BP |
2460 | err = dp_register_genl(); |
2461 | if (err < 0) | |
5a38795f | 2462 | goto error_unreg_netdev; |
982b8810 | 2463 | |
064af421 BP |
2464 | return 0; |
2465 | ||
5a38795f TG |
2466 | error_unreg_netdev: |
2467 | ovs_netdev_exit(); | |
064af421 | 2468 | error_unreg_notifier: |
850b6b3b | 2469 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2470 | error_compat_exit: |
2471 | compat_exit(); | |
2a4999f3 PS |
2472 | error_netns_exit: |
2473 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2474 | error_vport_exit: |
850b6b3b | 2475 | ovs_vport_exit(); |
064af421 | 2476 | error_flow_exit: |
850b6b3b | 2477 | ovs_flow_exit(); |
5282e284 TG |
2478 | error_unreg_rtnl_link: |
2479 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2480 | error_action_fifos_exit: |
2481 | action_fifos_exit(); | |
064af421 | 2482 | error: |
907c26a8 | 2483 | ovs_nsh_cleanup(); |
064af421 BP |
2484 | return err; |
2485 | } | |
2486 | ||
2487 | static void dp_cleanup(void) | |
2488 | { | |
982b8810 | 2489 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2490 | ovs_netdev_exit(); |
850b6b3b | 2491 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2492 | compat_exit(); |
2a4999f3 PS |
2493 | unregister_pernet_device(&ovs_net_ops); |
2494 | rcu_barrier(); | |
850b6b3b JG |
2495 | ovs_vport_exit(); |
2496 | ovs_flow_exit(); | |
5282e284 | 2497 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2498 | action_fifos_exit(); |
907c26a8 | 2499 | ovs_nsh_cleanup(); |
064af421 BP |
2500 | } |
2501 | ||
2502 | module_init(dp_init); | |
2503 | module_exit(dp_cleanup); | |
2504 | ||
2505 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2506 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2507 | MODULE_VERSION(VERSION); |
75e2077e TLSC |
2508 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2509 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2510 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2511 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
1cb57039 | 2512 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |