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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); | |
f463bdc9 KL |
462 | if (!upcall) { |
463 | err = -EINVAL; | |
464 | goto out; | |
465 | } | |
7257b535 BP |
466 | upcall->dp_ifindex = dp_ifindex; |
467 | ||
db7f2238 | 468 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
9a621f82 | 469 | BUG_ON(err); |
7257b535 BP |
470 | |
471 | if (upcall_info->userdata) | |
e995e3df | 472 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
462a988b | 473 | nla_len(upcall_info->userdata), |
e995e3df | 474 | nla_data(upcall_info->userdata)); |
7257b535 | 475 | |
e23775f2 | 476 | |
8b7ea2d4 WZ |
477 | if (upcall_info->egress_tun_info) { |
478 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
eee4c8eb KL |
479 | if (!nla) { |
480 | err = -EMSGSIZE; | |
481 | goto out; | |
482 | } | |
aad7cb91 PS |
483 | err = ovs_nla_put_tunnel_info(user_skb, |
484 | upcall_info->egress_tun_info); | |
8b7ea2d4 WZ |
485 | BUG_ON(err); |
486 | nla_nest_end(user_skb, nla); | |
487 | } | |
488 | ||
0e469d3b NM |
489 | if (upcall_info->actions_len) { |
490 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); | |
eee4c8eb KL |
491 | if (!nla) { |
492 | err = -EMSGSIZE; | |
493 | goto out; | |
494 | } | |
0e469d3b NM |
495 | err = ovs_nla_put_actions(upcall_info->actions, |
496 | upcall_info->actions_len, | |
497 | user_skb); | |
498 | if (!err) | |
499 | nla_nest_end(user_skb, nla); | |
500 | else | |
501 | nla_nest_cancel(user_skb, nla); | |
502 | } | |
503 | ||
a94ebc39 JS |
504 | /* Add OVS_PACKET_ATTR_MRU */ |
505 | if (upcall_info->mru) { | |
506 | if (nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, | |
507 | upcall_info->mru)) { | |
508 | err = -ENOBUFS; | |
509 | goto out; | |
510 | } | |
511 | pad_packet(dp, user_skb); | |
512 | } | |
513 | ||
039fb36c WT |
514 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
515 | if (cutlen > 0) { | |
516 | if (nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, | |
517 | skb->len)) { | |
518 | err = -ENOBUFS; | |
519 | goto out; | |
520 | } | |
521 | pad_packet(dp, user_skb); | |
522 | } | |
523 | ||
533bea51 | 524 | /* Only reserve room for attribute header, packet data is added |
af465b67 PS |
525 | * in skb_zerocopy() |
526 | */ | |
533bea51 TG |
527 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { |
528 | err = -ENOBUFS; | |
529 | goto out; | |
530 | } | |
4c7804f1 | 531 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
bed53bd1 | 532 | |
4c7804f1 | 533 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
2c272bd9 ZK |
534 | if (err) |
535 | goto out; | |
7257b535 | 536 | |
ef507cec | 537 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
a94ebc39 | 538 | pad_packet(dp, user_skb); |
ef507cec | 539 | |
533bea51 | 540 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
6161d3fd | 541 | |
533bea51 | 542 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
82706a6f | 543 | user_skb = NULL; |
6161d3fd | 544 | out: |
2c272bd9 ZK |
545 | if (err) |
546 | skb_tx_error(skb); | |
82706a6f | 547 | kfree_skb(user_skb); |
6161d3fd JG |
548 | kfree_skb(nskb); |
549 | return err; | |
cb5087ca BP |
550 | } |
551 | ||
df2c07f4 | 552 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 553 | { |
df2c07f4 | 554 | struct ovs_header *ovs_header = info->userhdr; |
a94ebc39 | 555 | struct net *net = sock_net(skb->sk); |
982b8810 | 556 | struct nlattr **a = info->attrs; |
e0e57990 | 557 | struct sw_flow_actions *acts; |
982b8810 | 558 | struct sk_buff *packet; |
e0e57990 | 559 | struct sw_flow *flow; |
ad50cb60 | 560 | struct sw_flow_actions *sf_acts; |
f7cd0081 | 561 | struct datapath *dp; |
a6059080 | 562 | struct vport *input_vport; |
a94ebc39 | 563 | u16 mru = 0; |
3f19d399 | 564 | int len; |
d6569377 | 565 | int err; |
2e460098 | 566 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
064af421 | 567 | |
f7cd0081 | 568 | err = -EINVAL; |
df2c07f4 | 569 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
7c3072cc | 570 | !a[OVS_PACKET_ATTR_ACTIONS]) |
e5cad958 | 571 | goto err; |
064af421 | 572 | |
df2c07f4 | 573 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 574 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
575 | err = -ENOMEM; |
576 | if (!packet) | |
e5cad958 | 577 | goto err; |
3f19d399 BP |
578 | skb_reserve(packet, NET_IP_ALIGN); |
579 | ||
bf3d6fce | 580 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
8d5ebd83 | 581 | |
a94ebc39 JS |
582 | /* Set packet's mru */ |
583 | if (a[OVS_PACKET_ATTR_MRU]) { | |
584 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
585 | packet->ignore_df = 1; | |
586 | } | |
587 | OVS_CB(packet)->mru = mru; | |
588 | ||
e0e57990 | 589 | /* Build an sw_flow for sending this packet. */ |
df65fec1 | 590 | flow = ovs_flow_alloc(); |
e0e57990 BP |
591 | err = PTR_ERR(flow); |
592 | if (IS_ERR(flow)) | |
e5cad958 | 593 | goto err_kfree_skb; |
064af421 | 594 | |
038e34ab JS |
595 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
596 | packet, &flow->key, log); | |
e0e57990 | 597 | if (err) |
9321954a | 598 | goto err_flow_free; |
e0e57990 | 599 | |
a94ebc39 | 600 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
9233cef7 | 601 | &flow->key, &acts, log); |
9b405f1a PS |
602 | if (err) |
603 | goto err_flow_free; | |
e0e57990 | 604 | |
ff27161e | 605 | rcu_assign_pointer(flow->sf_acts, acts); |
abff858b | 606 | packet->priority = flow->key.phy.priority; |
3025a772 | 607 | packet->mark = flow->key.phy.skb_mark; |
e0e57990 | 608 | |
d6569377 | 609 | rcu_read_lock(); |
a94ebc39 | 610 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
f7cd0081 | 611 | err = -ENODEV; |
e5cad958 BP |
612 | if (!dp) |
613 | goto err_unlock; | |
cc4015df | 614 | |
a6059080 AZ |
615 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
616 | if (!input_vport) | |
617 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
618 | ||
619 | if (!input_vport) | |
620 | goto err_unlock; | |
621 | ||
e23775f2 | 622 | packet->dev = input_vport->dev; |
a6059080 | 623 | OVS_CB(packet)->input_vport = input_vport; |
ad50cb60 | 624 | sf_acts = rcu_dereference(flow->sf_acts); |
a6059080 | 625 | |
e9141eec | 626 | local_bh_disable(); |
7d16c847 | 627 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
e9141eec | 628 | local_bh_enable(); |
d6569377 | 629 | rcu_read_unlock(); |
e0e57990 | 630 | |
a1c564be | 631 | ovs_flow_free(flow, false); |
e5cad958 | 632 | return err; |
064af421 | 633 | |
e5cad958 BP |
634 | err_unlock: |
635 | rcu_read_unlock(); | |
9321954a | 636 | err_flow_free: |
a1c564be | 637 | ovs_flow_free(flow, false); |
e5cad958 BP |
638 | err_kfree_skb: |
639 | kfree_skb(packet); | |
640 | err: | |
d6569377 | 641 | return err; |
064af421 BP |
642 | } |
643 | ||
df2c07f4 | 644 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
7c3072cc | 645 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
df2c07f4 JP |
646 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
647 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
2e460098 | 648 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
a94ebc39 | 649 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
982b8810 BP |
650 | }; |
651 | ||
18fd3a52 | 652 | static struct genl_ops dp_packet_genl_ops[] = { |
df2c07f4 | 653 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
a6a8674d | 654 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
982b8810 | 655 | .policy = packet_policy, |
df2c07f4 | 656 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
657 | } |
658 | }; | |
659 | ||
ba63fe26 | 660 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
cb25142c PS |
661 | .hdrsize = sizeof(struct ovs_header), |
662 | .name = OVS_PACKET_FAMILY, | |
663 | .version = OVS_PACKET_VERSION, | |
664 | .maxattr = OVS_PACKET_ATTR_MAX, | |
665 | .netnsok = true, | |
666 | .parallel_ops = true, | |
667 | .ops = dp_packet_genl_ops, | |
668 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
ba63fe26 | 669 | .module = THIS_MODULE, |
cb25142c PS |
670 | }; |
671 | ||
f1f60b85 | 672 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
4fa72a95 | 673 | struct ovs_dp_megaflow_stats *mega_stats) |
064af421 | 674 | { |
d6569377 | 675 | int i; |
f180c2e2 | 676 | |
4fa72a95 AZ |
677 | memset(mega_stats, 0, sizeof(*mega_stats)); |
678 | ||
994dc286 | 679 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
4fa72a95 | 680 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
064af421 | 681 | |
7257b535 | 682 | stats->n_hit = stats->n_missed = stats->n_lost = 0; |
4fa72a95 | 683 | |
d6569377 BP |
684 | for_each_possible_cpu(i) { |
685 | const struct dp_stats_percpu *percpu_stats; | |
686 | struct dp_stats_percpu local_stats; | |
821cb9fa | 687 | unsigned int start; |
44e05eca | 688 | |
d6569377 | 689 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 690 | |
d6569377 | 691 | do { |
b81deb15 | 692 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
d6569377 | 693 | local_stats = *percpu_stats; |
b81deb15 | 694 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
064af421 | 695 | |
d6569377 BP |
696 | stats->n_hit += local_stats.n_hit; |
697 | stats->n_missed += local_stats.n_missed; | |
698 | stats->n_lost += local_stats.n_lost; | |
4fa72a95 | 699 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
d6569377 BP |
700 | } |
701 | } | |
064af421 | 702 | |
bc619e29 JS |
703 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
704 | { | |
705 | return ovs_identifier_is_ufid(sfid) && | |
706 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
707 | } | |
708 | ||
709 | static bool should_fill_mask(uint32_t ufid_flags) | |
710 | { | |
711 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
712 | } | |
713 | ||
714 | static bool should_fill_actions(uint32_t ufid_flags) | |
0afa2373 | 715 | { |
bc619e29 JS |
716 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
717 | } | |
718 | ||
719 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
720 | const struct sw_flow_id *sfid, | |
721 | uint32_t ufid_flags) | |
722 | { | |
723 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
724 | ||
725 | /* OVS_FLOW_ATTR_UFID */ | |
726 | if (sfid && ovs_identifier_is_ufid(sfid)) | |
727 | len += nla_total_size(sfid->ufid_len); | |
728 | ||
729 | /* OVS_FLOW_ATTR_KEY */ | |
730 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
731 | len += nla_total_size(ovs_key_attr_size()); | |
732 | ||
733 | /* OVS_FLOW_ATTR_MASK */ | |
734 | if (should_fill_mask(ufid_flags)) | |
735 | len += nla_total_size(ovs_key_attr_size()); | |
736 | ||
737 | /* OVS_FLOW_ATTR_ACTIONS */ | |
738 | if (should_fill_actions(ufid_flags)) | |
c3bb15b3 | 739 | len += nla_total_size(acts->orig_len); |
bc619e29 JS |
740 | |
741 | return len | |
91b37647 | 742 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
0afa2373 | 743 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
91b37647 | 744 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
0afa2373 TG |
745 | } |
746 | ||
f1948bb9 JS |
747 | /* Called with ovs_mutex or RCU read lock. */ |
748 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
749 | struct sk_buff *skb) | |
750 | { | |
751 | struct ovs_flow_stats stats; | |
752 | __be16 tcp_flags; | |
753 | unsigned long used; | |
754 | ||
b0f3a2fe | 755 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
f71db6b1 | 756 | |
b0f3a2fe | 757 | if (used && |
89be7da8 PS |
758 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
759 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 760 | return -EMSGSIZE; |
d6569377 | 761 | |
b0f3a2fe | 762 | if (stats.n_packets && |
91b37647 PS |
763 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
764 | sizeof(struct ovs_flow_stats), &stats, | |
765 | OVS_FLOW_ATTR_PAD)) | |
f1948bb9 | 766 | return -EMSGSIZE; |
b0b906cc | 767 | |
b0f3a2fe PS |
768 | if ((u8)ntohs(tcp_flags) && |
769 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
f1948bb9 JS |
770 | return -EMSGSIZE; |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | /* Called with ovs_mutex or RCU read lock. */ | |
776 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
777 | struct sk_buff *skb, int skb_orig_len) | |
778 | { | |
779 | struct nlattr *start; | |
780 | int err; | |
d6569377 | 781 | |
df2c07f4 | 782 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
783 | * this is the first flow to be dumped into 'skb'. This is unusual for |
784 | * Netlink but individual action lists can be longer than | |
785 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
786 | * The userspace caller can always fetch the actions separately if it | |
787 | * really wants them. (Most userspace callers in fact don't care.) | |
788 | * | |
789 | * This can only fail for dump operations because the skb is always | |
790 | * properly sized for single flows. | |
791 | */ | |
9b405f1a | 792 | start = nla_nest_start(skb, OVS_FLOW_ATTR_ACTIONS); |
f6f481ee | 793 | if (start) { |
f44ccce1 PS |
794 | const struct sw_flow_actions *sf_acts; |
795 | ||
780ec6ae | 796 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
a097c0b2 PS |
797 | err = ovs_nla_put_actions(sf_acts->actions, |
798 | sf_acts->actions_len, skb); | |
f71db6b1 | 799 | |
0a25b039 BP |
800 | if (!err) |
801 | nla_nest_end(skb, start); | |
802 | else { | |
803 | if (skb_orig_len) | |
f1948bb9 | 804 | return err; |
0a25b039 BP |
805 | |
806 | nla_nest_cancel(skb, start); | |
807 | } | |
f1948bb9 JS |
808 | } else if (skb_orig_len) { |
809 | return -EMSGSIZE; | |
810 | } | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | /* Called with ovs_mutex or RCU read lock. */ | |
2c622e5a | 816 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, |
f1948bb9 | 817 | struct sk_buff *skb, u32 portid, |
bc619e29 | 818 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
f1948bb9 JS |
819 | { |
820 | const int skb_orig_len = skb->len; | |
821 | struct ovs_header *ovs_header; | |
822 | int err; | |
823 | ||
7d16c847 PS |
824 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, |
825 | flags, cmd); | |
f1948bb9 JS |
826 | if (!ovs_header) |
827 | return -EMSGSIZE; | |
7d16c847 | 828 | |
f1948bb9 JS |
829 | ovs_header->dp_ifindex = dp_ifindex; |
830 | ||
bc619e29 | 831 | err = ovs_nla_put_identifier(flow, skb); |
db7f2238 JS |
832 | if (err) |
833 | goto error; | |
834 | ||
bc619e29 JS |
835 | if (should_fill_key(&flow->id, ufid_flags)) { |
836 | err = ovs_nla_put_masked_key(flow, skb); | |
837 | if (err) | |
838 | goto error; | |
839 | } | |
840 | ||
841 | if (should_fill_mask(ufid_flags)) { | |
842 | err = ovs_nla_put_mask(flow, skb); | |
843 | if (err) | |
844 | goto error; | |
845 | } | |
f1948bb9 JS |
846 | |
847 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
848 | if (err) | |
849 | goto error; | |
850 | ||
bc619e29 JS |
851 | if (should_fill_actions(ufid_flags)) { |
852 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
853 | if (err) | |
854 | goto error; | |
855 | } | |
37a1300c | 856 | |
23b48dc1 TG |
857 | genlmsg_end(skb, ovs_header); |
858 | return 0; | |
d6569377 | 859 | |
37a1300c | 860 | error: |
df2c07f4 | 861 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 862 | return err; |
44e05eca BP |
863 | } |
864 | ||
f71db6b1 JR |
865 | /* May not be called with RCU read lock. */ |
866 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
bc619e29 | 867 | const struct sw_flow_id *sfid, |
afad3556 | 868 | struct genl_info *info, |
bc619e29 JS |
869 | bool always, |
870 | uint32_t ufid_flags) | |
44e05eca | 871 | { |
afad3556 | 872 | struct sk_buff *skb; |
bc619e29 | 873 | size_t len; |
d6569377 | 874 | |
114fce23 SG |
875 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, |
876 | GROUP_ID(&ovs_dp_flow_multicast_group))) | |
afad3556 JR |
877 | return NULL; |
878 | ||
bc619e29 | 879 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
40c08cda | 880 | skb = genlmsg_new(len, GFP_KERNEL); |
afad3556 JR |
881 | if (!skb) |
882 | return ERR_PTR(-ENOMEM); | |
883 | ||
884 | return skb; | |
37a1300c | 885 | } |
8d5ebd83 | 886 | |
f71db6b1 | 887 | /* Called with ovs_mutex. */ |
7d16c847 | 888 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, |
f71db6b1 JR |
889 | int dp_ifindex, |
890 | struct genl_info *info, u8 cmd, | |
bc619e29 | 891 | bool always, u32 ufid_flags) |
37a1300c BP |
892 | { |
893 | struct sk_buff *skb; | |
894 | int retval; | |
d6569377 | 895 | |
bc619e29 JS |
896 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
897 | &flow->id, info, always, ufid_flags); | |
a6ddcc9a | 898 | if (IS_ERR_OR_NULL(skb)) |
afad3556 | 899 | return skb; |
d6569377 | 900 | |
2c622e5a | 901 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
f71db6b1 | 902 | info->snd_portid, info->snd_seq, 0, |
bc619e29 | 903 | cmd, ufid_flags); |
37a1300c | 904 | BUG_ON(retval < 0); |
d6569377 | 905 | return skb; |
064af421 BP |
906 | } |
907 | ||
0c9fd022 | 908 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
064af421 | 909 | { |
a94ebc39 | 910 | struct net *net = sock_net(skb->sk); |
37a1300c | 911 | struct nlattr **a = info->attrs; |
df2c07f4 | 912 | struct ovs_header *ovs_header = info->userhdr; |
bc619e29 | 913 | struct sw_flow *flow = NULL, *new_flow; |
a1c564be | 914 | struct sw_flow_mask mask; |
37a1300c | 915 | struct sk_buff *reply; |
9c52546b | 916 | struct datapath *dp; |
0c9fd022 | 917 | struct sw_flow_actions *acts; |
a1c564be | 918 | struct sw_flow_match match; |
bc619e29 | 919 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
bc4a05c6 | 920 | int error; |
9233cef7 | 921 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
064af421 | 922 | |
6740b721 | 923 | /* Must have key and actions. */ |
37a1300c | 924 | error = -EINVAL; |
a473df5b | 925 | if (!a[OVS_FLOW_ATTR_KEY]) { |
7d16c847 | 926 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
37a1300c | 927 | goto error; |
a473df5b JG |
928 | } |
929 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
7d16c847 | 930 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
6740b721 | 931 | goto error; |
a473df5b | 932 | } |
a1c564be | 933 | |
6740b721 | 934 | /* Most of the time we need to allocate a new flow, do it before |
af465b67 PS |
935 | * locking. |
936 | */ | |
6740b721 JR |
937 | new_flow = ovs_flow_alloc(); |
938 | if (IS_ERR(new_flow)) { | |
939 | error = PTR_ERR(new_flow); | |
940 | goto error; | |
941 | } | |
942 | ||
943 | /* Extract key. */ | |
9b94fa6c | 944 | ovs_match_init(&match, &new_flow->key, false, &mask); |
038e34ab | 945 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
9233cef7 | 946 | a[OVS_FLOW_ATTR_MASK], log); |
37a1300c | 947 | if (error) |
6740b721 | 948 | goto err_kfree_flow; |
064af421 | 949 | |
bc619e29 JS |
950 | /* Extract flow identifier. */ |
951 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
1d334d4f | 952 | &new_flow->key, log); |
bc619e29 JS |
953 | if (error) |
954 | goto err_kfree_flow; | |
9b405f1a | 955 | |
1d334d4f | 956 | /* unmasked key is needed to match when ufid is not used. */ |
957 | if (ovs_identifier_is_key(&new_flow->id)) | |
958 | match.key = new_flow->id.unmasked_key; | |
959 | ||
960 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
961 | ||
6740b721 | 962 | /* Validate actions. */ |
a94ebc39 JS |
963 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
964 | &new_flow->key, &acts, log); | |
0c9fd022 | 965 | if (error) { |
7d16c847 | 966 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
4f67b12a | 967 | goto err_kfree_flow; |
6740b721 JR |
968 | } |
969 | ||
bc619e29 JS |
970 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
971 | ufid_flags); | |
6740b721 JR |
972 | if (IS_ERR(reply)) { |
973 | error = PTR_ERR(reply); | |
974 | goto err_kfree_acts; | |
37a1300c BP |
975 | } |
976 | ||
cd2a59e9 | 977 | ovs_lock(); |
a94ebc39 | 978 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
979 | if (unlikely(!dp)) { |
980 | error = -ENODEV; | |
cd2a59e9 | 981 | goto err_unlock_ovs; |
6740b721 | 982 | } |
bc619e29 | 983 | |
a1c564be | 984 | /* Check if this is a duplicate flow */ |
bc619e29 JS |
985 | if (ovs_identifier_is_ufid(&new_flow->id)) |
986 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
987 | if (!flow) | |
1d334d4f | 988 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
6740b721 JR |
989 | if (likely(!flow)) { |
990 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
d6569377 | 991 | |
d6569377 | 992 | /* Put flow in bucket. */ |
6740b721 JR |
993 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
994 | if (unlikely(error)) { | |
0585f7a8 | 995 | acts = NULL; |
6740b721 JR |
996 | goto err_unlock_ovs; |
997 | } | |
998 | ||
999 | if (unlikely(reply)) { | |
2c622e5a | 1000 | error = ovs_flow_cmd_fill_info(new_flow, |
6740b721 JR |
1001 | ovs_header->dp_ifindex, |
1002 | reply, info->snd_portid, | |
1003 | info->snd_seq, 0, | |
bc619e29 JS |
1004 | OVS_FLOW_CMD_NEW, |
1005 | ufid_flags); | |
6740b721 | 1006 | BUG_ON(error < 0); |
0585f7a8 | 1007 | } |
6740b721 | 1008 | ovs_unlock(); |
d6569377 | 1009 | } else { |
0c9fd022 JR |
1010 | struct sw_flow_actions *old_acts; |
1011 | ||
d6569377 BP |
1012 | /* Bail out if we're not allowed to modify an existing flow. |
1013 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1014 | * because Generic Netlink treats the latter as a dump | |
1015 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1016 | * gets fixed. | |
1017 | */ | |
6740b721 JR |
1018 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1019 | | NLM_F_EXCL))) { | |
1020 | error = -EEXIST; | |
cd2a59e9 | 1021 | goto err_unlock_ovs; |
6740b721 | 1022 | } |
bc619e29 JS |
1023 | /* The flow identifier has to be the same for flow updates. |
1024 | * Look for any overlapping flow. | |
1025 | */ | |
1026 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1027 | if (ovs_identifier_is_key(&flow->id)) | |
1028 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1029 | &match); | |
1030 | else /* UFID matches but key is different */ | |
1031 | flow = NULL; | |
3440e4bc AW |
1032 | if (!flow) { |
1033 | error = -ENOENT; | |
1034 | goto err_unlock_ovs; | |
1035 | } | |
6740b721 | 1036 | } |
0c9fd022 JR |
1037 | /* Update actions. */ |
1038 | old_acts = ovsl_dereference(flow->sf_acts); | |
1039 | rcu_assign_pointer(flow->sf_acts, acts); | |
0c9fd022 | 1040 | |
6740b721 | 1041 | if (unlikely(reply)) { |
2c622e5a | 1042 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1043 | ovs_header->dp_ifindex, |
1044 | reply, info->snd_portid, | |
1045 | info->snd_seq, 0, | |
bc619e29 JS |
1046 | OVS_FLOW_CMD_NEW, |
1047 | ufid_flags); | |
6740b721 JR |
1048 | BUG_ON(error < 0); |
1049 | } | |
1050 | ovs_unlock(); | |
0c9fd022 | 1051 | |
e23775f2 | 1052 | ovs_nla_free_flow_actions_rcu(old_acts); |
6740b721 | 1053 | ovs_flow_free(new_flow, false); |
0c9fd022 | 1054 | } |
6740b721 JR |
1055 | |
1056 | if (reply) | |
cb25142c | 1057 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
0c9fd022 JR |
1058 | return 0; |
1059 | ||
0c9fd022 JR |
1060 | err_unlock_ovs: |
1061 | ovs_unlock(); | |
6740b721 JR |
1062 | kfree_skb(reply); |
1063 | err_kfree_acts: | |
e23775f2 | 1064 | ovs_nla_free_flow_actions(acts); |
6740b721 JR |
1065 | err_kfree_flow: |
1066 | ovs_flow_free(new_flow, false); | |
0c9fd022 JR |
1067 | error: |
1068 | return error; | |
1069 | } | |
1070 | ||
cc561abf | 1071 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
19b6110d | 1072 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
a94ebc39 | 1073 | const struct nlattr *a, |
cc561abf | 1074 | const struct sw_flow_key *key, |
9233cef7 JR |
1075 | const struct sw_flow_mask *mask, |
1076 | bool log) | |
cc561abf PS |
1077 | { |
1078 | struct sw_flow_actions *acts; | |
1079 | struct sw_flow_key masked_key; | |
1080 | int error; | |
1081 | ||
ad4adec2 | 1082 | ovs_flow_mask_key(&masked_key, key, true, mask); |
a94ebc39 | 1083 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
cc561abf | 1084 | if (error) { |
9233cef7 | 1085 | OVS_NLERR(log, |
7d16c847 | 1086 | "Actions may not be safe on all matching packets"); |
cc561abf PS |
1087 | return ERR_PTR(error); |
1088 | } | |
1089 | ||
1090 | return acts; | |
1091 | } | |
1092 | ||
850c2a4d TZ |
1093 | /* Factor out match-init and action-copy to avoid |
1094 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1095 | * used to get actions, we new a function to save some | |
1096 | * stack space. | |
1097 | * | |
1098 | * If there are not key and action attrs, we return 0 | |
1099 | * directly. In the case, the caller will also not use the | |
1100 | * match as before. If there is action attr, we try to get | |
1101 | * actions and save them to *acts. Before returning from | |
1102 | * the function, we reset the match->mask pointer. Because | |
1103 | * we should not to return match object with dangling reference | |
1104 | * to mask. | |
1105 | * */ | |
19b6110d AB |
1106 | static noinline_for_stack int |
1107 | ovs_nla_init_match_and_action(struct net *net, | |
1108 | struct sw_flow_match *match, | |
1109 | struct sw_flow_key *key, | |
1110 | struct nlattr **a, | |
1111 | struct sw_flow_actions **acts, | |
1112 | bool log) | |
850c2a4d TZ |
1113 | { |
1114 | struct sw_flow_mask mask; | |
1115 | int error = 0; | |
1116 | ||
1117 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1118 | ovs_match_init(match, key, true, &mask); | |
1119 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1120 | a[OVS_FLOW_ATTR_MASK], log); | |
1121 | if (error) | |
1122 | goto error; | |
1123 | } | |
1124 | ||
1125 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1126 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1127 | OVS_NLERR(log, | |
1128 | "Flow key attribute not present in set flow."); | |
497895ca CJ |
1129 | error = -EINVAL; |
1130 | goto error; | |
850c2a4d TZ |
1131 | } |
1132 | ||
1133 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1134 | &mask, log); | |
1135 | if (IS_ERR(*acts)) { | |
1136 | error = PTR_ERR(*acts); | |
1137 | goto error; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* On success, error is 0. */ | |
1142 | error: | |
1143 | match->mask = NULL; | |
1144 | return error; | |
1145 | } | |
1146 | ||
0c9fd022 JR |
1147 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1148 | { | |
a94ebc39 | 1149 | struct net *net = sock_net(skb->sk); |
0c9fd022 JR |
1150 | struct nlattr **a = info->attrs; |
1151 | struct ovs_header *ovs_header = info->userhdr; | |
1d2a1b5f | 1152 | struct sw_flow_key key; |
0c9fd022 | 1153 | struct sw_flow *flow; |
0c9fd022 JR |
1154 | struct sk_buff *reply = NULL; |
1155 | struct datapath *dp; | |
6740b721 | 1156 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
0c9fd022 | 1157 | struct sw_flow_match match; |
bc619e29 JS |
1158 | struct sw_flow_id sfid; |
1159 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
b24baa1a | 1160 | int error = 0; |
9233cef7 | 1161 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1162 | bool ufid_present; |
0c9fd022 | 1163 | |
bc619e29 | 1164 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
850c2a4d | 1165 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
b24baa1a PS |
1166 | OVS_NLERR(log, |
1167 | "Flow set message rejected, Key attribute missing."); | |
850c2a4d | 1168 | return -EINVAL; |
b24baa1a | 1169 | } |
850c2a4d TZ |
1170 | |
1171 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1172 | &acts, log); | |
0c9fd022 JR |
1173 | if (error) |
1174 | goto error; | |
d6569377 | 1175 | |
850c2a4d | 1176 | if (acts) { |
ff27161e | 1177 | /* Can allocate before locking if have acts. */ |
bc619e29 JS |
1178 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1179 | ufid_flags); | |
6740b721 JR |
1180 | if (IS_ERR(reply)) { |
1181 | error = PTR_ERR(reply); | |
1182 | goto err_kfree_acts; | |
90b8c2f7 | 1183 | } |
0c9fd022 JR |
1184 | } |
1185 | ||
1186 | ovs_lock(); | |
a94ebc39 | 1187 | dp = get_dp(net, ovs_header->dp_ifindex); |
6740b721 JR |
1188 | if (unlikely(!dp)) { |
1189 | error = -ENODEV; | |
0c9fd022 | 1190 | goto err_unlock_ovs; |
6740b721 | 1191 | } |
0c9fd022 | 1192 | /* Check that the flow exists. */ |
bc619e29 JS |
1193 | if (ufid_present) |
1194 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1195 | else | |
1196 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
6740b721 JR |
1197 | if (unlikely(!flow)) { |
1198 | error = -ENOENT; | |
0c9fd022 | 1199 | goto err_unlock_ovs; |
6740b721 | 1200 | } |
3440e4bc | 1201 | |
0c9fd022 | 1202 | /* Update actions, if present. */ |
6740b721 | 1203 | if (likely(acts)) { |
0c9fd022 JR |
1204 | old_acts = ovsl_dereference(flow->sf_acts); |
1205 | rcu_assign_pointer(flow->sf_acts, acts); | |
6740b721 JR |
1206 | |
1207 | if (unlikely(reply)) { | |
2c622e5a | 1208 | error = ovs_flow_cmd_fill_info(flow, |
6740b721 JR |
1209 | ovs_header->dp_ifindex, |
1210 | reply, info->snd_portid, | |
1211 | info->snd_seq, 0, | |
229486c2 | 1212 | OVS_FLOW_CMD_SET, |
bc619e29 | 1213 | ufid_flags); |
6740b721 JR |
1214 | BUG_ON(error < 0); |
1215 | } | |
1216 | } else { | |
1217 | /* Could not alloc without acts before locking. */ | |
7d16c847 | 1218 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, |
229486c2 | 1219 | info, OVS_FLOW_CMD_SET, false, |
bc619e29 JS |
1220 | ufid_flags); |
1221 | ||
6740b721 JR |
1222 | if (unlikely(IS_ERR(reply))) { |
1223 | error = PTR_ERR(reply); | |
1224 | goto err_unlock_ovs; | |
1225 | } | |
9c52546b | 1226 | } |
0c9fd022 | 1227 | |
0c9fd022 JR |
1228 | /* Clear stats. */ |
1229 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1230 | ovs_flow_stats_clear(flow); | |
cd2a59e9 | 1231 | ovs_unlock(); |
37a1300c | 1232 | |
6740b721 | 1233 | if (reply) |
cb25142c | 1234 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
6740b721 | 1235 | if (old_acts) |
e23775f2 | 1236 | ovs_nla_free_flow_actions_rcu(old_acts); |
7d16c847 | 1237 | |
d6569377 | 1238 | return 0; |
704a1e09 | 1239 | |
cd2a59e9 PS |
1240 | err_unlock_ovs: |
1241 | ovs_unlock(); | |
6740b721 JR |
1242 | kfree_skb(reply); |
1243 | err_kfree_acts: | |
e23775f2 | 1244 | ovs_nla_free_flow_actions(acts); |
37a1300c | 1245 | error: |
9c52546b | 1246 | return error; |
704a1e09 BP |
1247 | } |
1248 | ||
df2c07f4 | 1249 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1250 | { |
37a1300c | 1251 | struct nlattr **a = info->attrs; |
df2c07f4 | 1252 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1253 | struct net *net = sock_net(skb->sk); |
37a1300c | 1254 | struct sw_flow_key key; |
37a1300c | 1255 | struct sk_buff *reply; |
704a1e09 | 1256 | struct sw_flow *flow; |
9c52546b | 1257 | struct datapath *dp; |
a1c564be | 1258 | struct sw_flow_match match; |
bc619e29 JS |
1259 | struct sw_flow_id ufid; |
1260 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1261 | int err = 0; | |
9233cef7 | 1262 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1263 | bool ufid_present; |
704a1e09 | 1264 | |
bc619e29 JS |
1265 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1266 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1267 | ovs_match_init(&match, &key, true, NULL); |
038e34ab | 1268 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
bc619e29 JS |
1269 | log); |
1270 | } else if (!ufid_present) { | |
9233cef7 JR |
1271 | OVS_NLERR(log, |
1272 | "Flow get message rejected, Key attribute missing."); | |
bc619e29 | 1273 | err = -EINVAL; |
1b936472 | 1274 | } |
37a1300c BP |
1275 | if (err) |
1276 | return err; | |
704a1e09 | 1277 | |
cd2a59e9 | 1278 | ovs_lock(); |
2a4999f3 | 1279 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 PS |
1280 | if (!dp) { |
1281 | err = -ENODEV; | |
1282 | goto unlock; | |
1283 | } | |
704a1e09 | 1284 | |
bc619e29 JS |
1285 | if (ufid_present) |
1286 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1287 | else | |
1288 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1289 | if (!flow) { |
cd2a59e9 PS |
1290 | err = -ENOENT; |
1291 | goto unlock; | |
1292 | } | |
d6569377 | 1293 | |
7d16c847 | 1294 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
229486c2 | 1295 | OVS_FLOW_CMD_GET, true, ufid_flags); |
cd2a59e9 PS |
1296 | if (IS_ERR(reply)) { |
1297 | err = PTR_ERR(reply); | |
1298 | goto unlock; | |
1299 | } | |
36956a7d | 1300 | |
cd2a59e9 | 1301 | ovs_unlock(); |
37a1300c | 1302 | return genlmsg_reply(reply, info); |
cd2a59e9 PS |
1303 | unlock: |
1304 | ovs_unlock(); | |
1305 | return err; | |
d6569377 | 1306 | } |
9c52546b | 1307 | |
df2c07f4 | 1308 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1309 | { |
37a1300c | 1310 | struct nlattr **a = info->attrs; |
df2c07f4 | 1311 | struct ovs_header *ovs_header = info->userhdr; |
038e34ab | 1312 | struct net *net = sock_net(skb->sk); |
37a1300c | 1313 | struct sw_flow_key key; |
37a1300c | 1314 | struct sk_buff *reply; |
bc619e29 | 1315 | struct sw_flow *flow = NULL; |
d6569377 | 1316 | struct datapath *dp; |
a1c564be | 1317 | struct sw_flow_match match; |
bc619e29 JS |
1318 | struct sw_flow_id ufid; |
1319 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
d6569377 | 1320 | int err; |
9233cef7 | 1321 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
bc619e29 | 1322 | bool ufid_present; |
36956a7d | 1323 | |
bc619e29 JS |
1324 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1325 | if (a[OVS_FLOW_ATTR_KEY]) { | |
9b94fa6c | 1326 | ovs_match_init(&match, &key, true, NULL); |
038e34ab JS |
1327 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1328 | NULL, log); | |
cde7f3ba JR |
1329 | if (unlikely(err)) |
1330 | return err; | |
1331 | } | |
1332 | ||
cd2a59e9 | 1333 | ovs_lock(); |
2a4999f3 | 1334 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
cde7f3ba | 1335 | if (unlikely(!dp)) { |
cd2a59e9 PS |
1336 | err = -ENODEV; |
1337 | goto unlock; | |
1338 | } | |
7d16c847 | 1339 | |
bc619e29 | 1340 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
994dc286 | 1341 | err = ovs_flow_tbl_flush(&dp->table); |
cd2a59e9 PS |
1342 | goto unlock; |
1343 | } | |
7d16c847 | 1344 | |
bc619e29 JS |
1345 | if (ufid_present) |
1346 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1347 | else | |
1348 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
3440e4bc | 1349 | if (unlikely(!flow)) { |
cd2a59e9 PS |
1350 | err = -ENOENT; |
1351 | goto unlock; | |
1352 | } | |
d6569377 | 1353 | |
994dc286 | 1354 | ovs_flow_tbl_remove(&dp->table, flow); |
cde7f3ba | 1355 | ovs_unlock(); |
37a1300c | 1356 | |
46051cf8 | 1357 | reply = ovs_flow_cmd_alloc_info(rcu_dereference_raw(flow->sf_acts), |
bc619e29 | 1358 | &flow->id, info, false, ufid_flags); |
cde7f3ba JR |
1359 | |
1360 | if (likely(reply)) { | |
1361 | if (likely(!IS_ERR(reply))) { | |
7d16c847 PS |
1362 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1363 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
cde7f3ba JR |
1364 | reply, info->snd_portid, |
1365 | info->snd_seq, 0, | |
bc619e29 JS |
1366 | OVS_FLOW_CMD_DEL, |
1367 | ufid_flags); | |
cde7f3ba JR |
1368 | rcu_read_unlock(); |
1369 | BUG_ON(err < 0); | |
cb25142c | 1370 | ovs_notify(&dp_flow_genl_family, &ovs_dp_flow_multicast_group, reply, info); |
cde7f3ba | 1371 | } else { |
cb25142c PS |
1372 | genl_set_err(&dp_flow_genl_family, sock_net(skb->sk), 0, |
1373 | GROUP_ID(&ovs_dp_flow_multicast_group), PTR_ERR(reply)); | |
1374 | ||
cde7f3ba | 1375 | } |
afad3556 | 1376 | } |
37a1300c | 1377 | |
a1c564be | 1378 | ovs_flow_free(flow, true); |
37a1300c | 1379 | return 0; |
cd2a59e9 PS |
1380 | unlock: |
1381 | ovs_unlock(); | |
1382 | return err; | |
37a1300c BP |
1383 | } |
1384 | ||
df2c07f4 | 1385 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1386 | { |
bc619e29 | 1387 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
df2c07f4 | 1388 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
994dc286 | 1389 | struct table_instance *ti; |
37a1300c | 1390 | struct datapath *dp; |
bc619e29 JS |
1391 | u32 ufid_flags; |
1392 | int err; | |
1393 | ||
1394 | err = genlmsg_parse(cb->nlh, &dp_flow_genl_family, a, | |
15702dc9 | 1395 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); |
bc619e29 JS |
1396 | if (err) |
1397 | return err; | |
1398 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
37a1300c | 1399 | |
f44ccce1 | 1400 | rcu_read_lock(); |
01ac0970 | 1401 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
cd2a59e9 | 1402 | if (!dp) { |
f44ccce1 | 1403 | rcu_read_unlock(); |
37a1300c | 1404 | return -ENODEV; |
cd2a59e9 | 1405 | } |
37a1300c | 1406 | |
994dc286 | 1407 | ti = rcu_dereference(dp->table.ti); |
37a1300c | 1408 | for (;;) { |
37a1300c BP |
1409 | struct sw_flow *flow; |
1410 | u32 bucket, obj; | |
1411 | ||
1412 | bucket = cb->args[0]; | |
1413 | obj = cb->args[1]; | |
994dc286 | 1414 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
3544358a | 1415 | if (!flow) |
37a1300c BP |
1416 | break; |
1417 | ||
2c622e5a | 1418 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
28aea917 | 1419 | NETLINK_CB(cb->skb).portid, |
37a1300c | 1420 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
229486c2 | 1421 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
37a1300c BP |
1422 | break; |
1423 | ||
1424 | cb->args[0] = bucket; | |
1425 | cb->args[1] = obj; | |
1426 | } | |
f44ccce1 | 1427 | rcu_read_unlock(); |
37a1300c | 1428 | return skb->len; |
704a1e09 BP |
1429 | } |
1430 | ||
cb25142c PS |
1431 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1432 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
9233cef7 | 1433 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
cb25142c PS |
1434 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1435 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
9233cef7 | 1436 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
bc619e29 JS |
1437 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1438 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
cb25142c PS |
1439 | }; |
1440 | ||
18fd3a52 | 1441 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1442 | { .cmd = OVS_FLOW_CMD_NEW, |
a6a8674d | 1443 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1444 | .policy = flow_policy, |
0c9fd022 | 1445 | .doit = ovs_flow_cmd_new |
37a1300c | 1446 | }, |
df2c07f4 | 1447 | { .cmd = OVS_FLOW_CMD_DEL, |
a6a8674d | 1448 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1449 | .policy = flow_policy, |
df2c07f4 | 1450 | .doit = ovs_flow_cmd_del |
37a1300c | 1451 | }, |
df2c07f4 | 1452 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1453 | .flags = 0, /* OK for unprivileged users. */ |
1454 | .policy = flow_policy, | |
df2c07f4 JP |
1455 | .doit = ovs_flow_cmd_get, |
1456 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1457 | }, |
df2c07f4 | 1458 | { .cmd = OVS_FLOW_CMD_SET, |
a6a8674d | 1459 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37a1300c | 1460 | .policy = flow_policy, |
0c9fd022 | 1461 | .doit = ovs_flow_cmd_set, |
37a1300c BP |
1462 | }, |
1463 | }; | |
1464 | ||
ba63fe26 | 1465 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
df2c07f4 | 1466 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1467 | .name = OVS_FLOW_FAMILY, |
1468 | .version = OVS_FLOW_VERSION, | |
1469 | .maxattr = OVS_FLOW_ATTR_MAX, | |
b3dcb73c | 1470 | .netnsok = true, |
cb25142c PS |
1471 | .parallel_ops = true, |
1472 | .ops = dp_flow_genl_ops, | |
1473 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1474 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1475 | .n_mcgrps = 1, | |
ba63fe26 | 1476 | .module = THIS_MODULE, |
aaff4b55 BP |
1477 | }; |
1478 | ||
0afa2373 TG |
1479 | static size_t ovs_dp_cmd_msg_size(void) |
1480 | { | |
1481 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1482 | ||
1483 | msgsize += nla_total_size(IFNAMSIZ); | |
91b37647 PS |
1484 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1485 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
300af20a | 1486 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
0afa2373 TG |
1487 | |
1488 | return msgsize; | |
1489 | } | |
1490 | ||
d637497c | 1491 | /* Called with ovs_mutex. */ |
df2c07f4 | 1492 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
28aea917 | 1493 | u32 portid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1494 | { |
df2c07f4 | 1495 | struct ovs_header *ovs_header; |
e926dfe3 | 1496 | struct ovs_dp_stats dp_stats; |
4fa72a95 | 1497 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
064af421 BP |
1498 | int err; |
1499 | ||
28aea917 | 1500 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1501 | flags, cmd); |
df2c07f4 | 1502 | if (!ovs_header) |
aaff4b55 | 1503 | goto error; |
064af421 | 1504 | |
b063d9f0 | 1505 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1506 | |
850b6b3b | 1507 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
064af421 | 1508 | if (err) |
d6569377 | 1509 | goto nla_put_failure; |
064af421 | 1510 | |
4fa72a95 | 1511 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
91b37647 PS |
1512 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1513 | &dp_stats, OVS_DP_ATTR_PAD)) | |
4fa72a95 AZ |
1514 | goto nla_put_failure; |
1515 | ||
91b37647 PS |
1516 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1517 | sizeof(struct ovs_dp_megaflow_stats), | |
1518 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
c3cc8c03 | 1519 | goto nla_put_failure; |
d6569377 | 1520 | |
c58cc9a4 TG |
1521 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1522 | goto nla_put_failure; | |
1523 | ||
23b48dc1 TG |
1524 | genlmsg_end(skb, ovs_header); |
1525 | return 0; | |
d6569377 BP |
1526 | |
1527 | nla_put_failure: | |
df2c07f4 | 1528 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1529 | error: |
1530 | return -EMSGSIZE; | |
d6569377 BP |
1531 | } |
1532 | ||
40c08cda | 1533 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
d6569377 | 1534 | { |
40c08cda | 1535 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
aaff4b55 | 1536 | } |
9dca7bd5 | 1537 | |
aa917006 | 1538 | /* Called with rcu_read_lock or ovs_mutex. */ |
2a4999f3 | 1539 | static struct datapath *lookup_datapath(struct net *net, |
f1f60b85 | 1540 | const struct ovs_header *ovs_header, |
6455100f | 1541 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1542 | { |
254f2dc8 BP |
1543 | struct datapath *dp; |
1544 | ||
df2c07f4 | 1545 | if (!a[OVS_DP_ATTR_NAME]) |
2a4999f3 | 1546 | dp = get_dp(net, ovs_header->dp_ifindex); |
254f2dc8 | 1547 | else { |
d6569377 | 1548 | struct vport *vport; |
d6569377 | 1549 | |
2a4999f3 | 1550 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
df2c07f4 | 1551 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
d6569377 | 1552 | } |
254f2dc8 | 1553 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1554 | } |
1555 | ||
94358dcf TG |
1556 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1557 | { | |
1558 | struct datapath *dp; | |
1559 | ||
1560 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
09350a3d | 1561 | if (IS_ERR(dp)) |
94358dcf TG |
1562 | return; |
1563 | ||
1564 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1565 | dp->user_features = 0; | |
1566 | } | |
1567 | ||
f1f60b85 | 1568 | static void ovs_dp_change(struct datapath *dp, struct nlattr *a[]) |
c58cc9a4 TG |
1569 | { |
1570 | if (a[OVS_DP_ATTR_USER_FEATURES]) | |
1571 | dp->user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1572 | } | |
1573 | ||
df2c07f4 | 1574 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1575 | { |
aaff4b55 | 1576 | struct nlattr **a = info->attrs; |
d6569377 | 1577 | struct vport_parms parms; |
aaff4b55 | 1578 | struct sk_buff *reply; |
d6569377 BP |
1579 | struct datapath *dp; |
1580 | struct vport *vport; | |
2a4999f3 | 1581 | struct ovs_net *ovs_net; |
95b1d73a | 1582 | int err, i; |
d6569377 | 1583 | |
d6569377 | 1584 | err = -EINVAL; |
ea36840f | 1585 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1586 | goto err; |
1587 | ||
40c08cda | 1588 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1589 | if (!reply) |
1590 | return -ENOMEM; | |
d6569377 | 1591 | |
d6569377 BP |
1592 | err = -ENOMEM; |
1593 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1594 | if (dp == NULL) | |
d81eef1b | 1595 | goto err_free_reply; |
2a4999f3 | 1596 | |
c0cddcec | 1597 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
0ceaa66c | 1598 | |
d6569377 | 1599 | /* Allocate table. */ |
994dc286 PS |
1600 | err = ovs_flow_tbl_init(&dp->table); |
1601 | if (err) | |
d6569377 BP |
1602 | goto err_free_dp; |
1603 | ||
08fb1bbd | 1604 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); |
99769a40 JG |
1605 | if (!dp->stats_percpu) { |
1606 | err = -ENOMEM; | |
1607 | goto err_destroy_table; | |
1608 | } | |
1609 | ||
8401bb6a KC |
1610 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, |
1611 | sizeof(struct hlist_head), | |
1612 | GFP_KERNEL); | |
95b1d73a PS |
1613 | if (!dp->ports) { |
1614 | err = -ENOMEM; | |
1615 | goto err_destroy_percpu; | |
1616 | } | |
1617 | ||
1618 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1619 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1620 | ||
1cb57039 AZ |
1621 | err = ovs_meters_init(dp); |
1622 | if (err) | |
1623 | goto err_destroy_ports_array; | |
1624 | ||
d6569377 | 1625 | /* Set up our datapath device. */ |
df2c07f4 JP |
1626 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1627 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1628 | parms.options = NULL; |
1629 | parms.dp = dp; | |
df2c07f4 | 1630 | parms.port_no = OVSP_LOCAL; |
beb1c69a | 1631 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
b063d9f0 | 1632 | |
c58cc9a4 TG |
1633 | ovs_dp_change(dp, a); |
1634 | ||
d81eef1b JR |
1635 | /* So far only local changes have been made, now need the lock. */ |
1636 | ovs_lock(); | |
1637 | ||
d6569377 BP |
1638 | vport = new_vport(&parms); |
1639 | if (IS_ERR(vport)) { | |
1640 | err = PTR_ERR(vport); | |
1641 | if (err == -EBUSY) | |
1642 | err = -EEXIST; | |
1643 | ||
94358dcf TG |
1644 | if (err == -EEXIST) { |
1645 | /* An outdated user space instance that does not understand | |
1646 | * the concept of user_features has attempted to create a new | |
1647 | * datapath and is likely to reuse it. Drop all user features. | |
1648 | */ | |
1649 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1650 | ovs_dp_reset_user_features(skb, info); | |
1651 | } | |
1652 | ||
1cb57039 | 1653 | goto err_destroy_meters; |
d6569377 | 1654 | } |
d6569377 | 1655 | |
d81eef1b JR |
1656 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1657 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1658 | BUG_ON(err < 0); | |
aaff4b55 | 1659 | |
2a4999f3 | 1660 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
fb93e9aa | 1661 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
a0fb56c1 | 1662 | |
cd2a59e9 | 1663 | ovs_unlock(); |
d6569377 | 1664 | |
cb25142c | 1665 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
d6569377 BP |
1666 | return 0; |
1667 | ||
1cb57039 | 1668 | err_destroy_meters: |
d81eef1b | 1669 | ovs_unlock(); |
1cb57039 AZ |
1670 | ovs_meters_exit(dp); |
1671 | err_destroy_ports_array: | |
95b1d73a | 1672 | kfree(dp->ports); |
99769a40 JG |
1673 | err_destroy_percpu: |
1674 | free_percpu(dp->stats_percpu); | |
d6569377 | 1675 | err_destroy_table: |
e379e4d1 | 1676 | ovs_flow_tbl_destroy(&dp->table); |
d6569377 | 1677 | err_free_dp: |
d6569377 | 1678 | kfree(dp); |
d81eef1b JR |
1679 | err_free_reply: |
1680 | kfree_skb(reply); | |
d6569377 | 1681 | err: |
064af421 BP |
1682 | return err; |
1683 | } | |
1684 | ||
cd2a59e9 | 1685 | /* Called with ovs_mutex. */ |
2a4999f3 | 1686 | static void __dp_destroy(struct datapath *dp) |
44e05eca | 1687 | { |
95b1d73a | 1688 | int i; |
44e05eca | 1689 | |
95b1d73a PS |
1690 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1691 | struct vport *vport; | |
f8dfbcb7 | 1692 | struct hlist_node *n; |
95b1d73a | 1693 | |
f8dfbcb7 | 1694 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
95b1d73a PS |
1695 | if (vport->port_no != OVSP_LOCAL) |
1696 | ovs_dp_detach_port(vport); | |
1697 | } | |
ed099e92 | 1698 | |
fb93e9aa | 1699 | list_del_rcu(&dp->list_node); |
ed099e92 | 1700 | |
cd2a59e9 | 1701 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
d103f479 AZ |
1702 | * all ports in datapath are destroyed first before freeing datapath. |
1703 | */ | |
cd2a59e9 | 1704 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
99620d2c | 1705 | |
d103f479 | 1706 | /* RCU destroy the flow table */ |
ed099e92 | 1707 | call_rcu(&dp->rcu, destroy_dp_rcu); |
2a4999f3 PS |
1708 | } |
1709 | ||
1710 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1711 | { | |
1712 | struct sk_buff *reply; | |
1713 | struct datapath *dp; | |
1714 | int err; | |
1715 | ||
40c08cda | 1716 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1717 | if (!reply) |
1718 | return -ENOMEM; | |
1719 | ||
cd2a59e9 | 1720 | ovs_lock(); |
2a4999f3 PS |
1721 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1722 | err = PTR_ERR(dp); | |
1723 | if (IS_ERR(dp)) | |
d81eef1b | 1724 | goto err_unlock_free; |
2a4999f3 | 1725 | |
d81eef1b JR |
1726 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1727 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1728 | BUG_ON(err < 0); | |
2a4999f3 PS |
1729 | |
1730 | __dp_destroy(dp); | |
d81eef1b | 1731 | ovs_unlock(); |
7d16c847 | 1732 | |
cb25142c | 1733 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
99620d2c | 1734 | return 0; |
d81eef1b JR |
1735 | |
1736 | err_unlock_free: | |
cd2a59e9 | 1737 | ovs_unlock(); |
d81eef1b | 1738 | kfree_skb(reply); |
cd2a59e9 | 1739 | return err; |
44e05eca BP |
1740 | } |
1741 | ||
df2c07f4 | 1742 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1743 | { |
aaff4b55 | 1744 | struct sk_buff *reply; |
d6569377 | 1745 | struct datapath *dp; |
d6569377 | 1746 | int err; |
064af421 | 1747 | |
40c08cda | 1748 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1749 | if (!reply) |
1750 | return -ENOMEM; | |
1751 | ||
cd2a59e9 | 1752 | ovs_lock(); |
2a4999f3 | 1753 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 | 1754 | err = PTR_ERR(dp); |
d6569377 | 1755 | if (IS_ERR(dp)) |
d81eef1b | 1756 | goto err_unlock_free; |
38c6ecbc | 1757 | |
c58cc9a4 TG |
1758 | ovs_dp_change(dp, info->attrs); |
1759 | ||
d81eef1b | 1760 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
229486c2 | 1761 | info->snd_seq, 0, OVS_DP_CMD_GET); |
d81eef1b | 1762 | BUG_ON(err < 0); |
a0fb56c1 | 1763 | |
cd2a59e9 | 1764 | ovs_unlock(); |
7d16c847 | 1765 | |
cb25142c | 1766 | ovs_notify(&dp_datapath_genl_family, &ovs_dp_datapath_multicast_group, reply, info); |
aaff4b55 | 1767 | return 0; |
d81eef1b JR |
1768 | |
1769 | err_unlock_free: | |
cd2a59e9 | 1770 | ovs_unlock(); |
d81eef1b | 1771 | kfree_skb(reply); |
cd2a59e9 | 1772 | return err; |
064af421 BP |
1773 | } |
1774 | ||
df2c07f4 | 1775 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1776 | { |
aaff4b55 | 1777 | struct sk_buff *reply; |
d6569377 | 1778 | struct datapath *dp; |
d6569377 | 1779 | int err; |
1dcf111b | 1780 | |
40c08cda | 1781 | reply = ovs_dp_cmd_alloc_info(); |
d81eef1b JR |
1782 | if (!reply) |
1783 | return -ENOMEM; | |
1784 | ||
d637497c | 1785 | ovs_lock(); |
2a4999f3 | 1786 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
cd2a59e9 PS |
1787 | if (IS_ERR(dp)) { |
1788 | err = PTR_ERR(dp); | |
d81eef1b | 1789 | goto err_unlock_free; |
cd2a59e9 | 1790 | } |
d81eef1b | 1791 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
229486c2 | 1792 | info->snd_seq, 0, OVS_DP_CMD_GET); |
d81eef1b | 1793 | BUG_ON(err < 0); |
d637497c | 1794 | ovs_unlock(); |
aaff4b55 BP |
1795 | |
1796 | return genlmsg_reply(reply, info); | |
cd2a59e9 | 1797 | |
d81eef1b | 1798 | err_unlock_free: |
d637497c | 1799 | ovs_unlock(); |
d81eef1b | 1800 | kfree_skb(reply); |
cd2a59e9 | 1801 | return err; |
1dcf111b JP |
1802 | } |
1803 | ||
df2c07f4 | 1804 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1805 | { |
2a4999f3 | 1806 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
254f2dc8 BP |
1807 | struct datapath *dp; |
1808 | int skip = cb->args[0]; | |
1809 | int i = 0; | |
a7786963 | 1810 | |
d637497c PS |
1811 | ovs_lock(); |
1812 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
a2bab2f0 | 1813 | if (i >= skip && |
28aea917 | 1814 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
aaff4b55 | 1815 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
229486c2 | 1816 | OVS_DP_CMD_GET) < 0) |
aaff4b55 | 1817 | break; |
254f2dc8 | 1818 | i++; |
a7786963 | 1819 | } |
d637497c | 1820 | ovs_unlock(); |
aaff4b55 | 1821 | |
254f2dc8 BP |
1822 | cb->args[0] = i; |
1823 | ||
aaff4b55 | 1824 | return skb->len; |
c19e6535 BP |
1825 | } |
1826 | ||
cb25142c PS |
1827 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1828 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1829 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1830 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
1831 | }; | |
1832 | ||
18fd3a52 | 1833 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1834 | { .cmd = OVS_DP_CMD_NEW, |
a6a8674d | 1835 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1836 | .policy = datapath_policy, |
df2c07f4 | 1837 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1838 | }, |
df2c07f4 | 1839 | { .cmd = OVS_DP_CMD_DEL, |
a6a8674d | 1840 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1841 | .policy = datapath_policy, |
df2c07f4 | 1842 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1843 | }, |
df2c07f4 | 1844 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1845 | .flags = 0, /* OK for unprivileged users. */ |
1846 | .policy = datapath_policy, | |
df2c07f4 JP |
1847 | .doit = ovs_dp_cmd_get, |
1848 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1849 | }, |
df2c07f4 | 1850 | { .cmd = OVS_DP_CMD_SET, |
a6a8674d | 1851 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
aaff4b55 | 1852 | .policy = datapath_policy, |
df2c07f4 | 1853 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1854 | }, |
1855 | }; | |
1856 | ||
ba63fe26 | 1857 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
df2c07f4 | 1858 | .hdrsize = sizeof(struct ovs_header), |
cb25142c PS |
1859 | .name = OVS_DATAPATH_FAMILY, |
1860 | .version = OVS_DATAPATH_VERSION, | |
1861 | .maxattr = OVS_DP_ATTR_MAX, | |
b3dcb73c | 1862 | .netnsok = true, |
cb25142c PS |
1863 | .parallel_ops = true, |
1864 | .ops = dp_datapath_genl_ops, | |
1865 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1866 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1867 | .n_mcgrps = 1, | |
ba63fe26 | 1868 | .module = THIS_MODULE, |
f0fef760 BP |
1869 | }; |
1870 | ||
cd2a59e9 | 1871 | /* Called with ovs_mutex or RCU read lock. */ |
df2c07f4 | 1872 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
b147f2e9 JB |
1873 | struct net *net, u32 portid, u32 seq, |
1874 | u32 flags, u8 cmd) | |
064af421 | 1875 | { |
df2c07f4 | 1876 | struct ovs_header *ovs_header; |
e926dfe3 | 1877 | struct ovs_vport_stats vport_stats; |
c19e6535 BP |
1878 | int err; |
1879 | ||
28aea917 | 1880 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
f0fef760 | 1881 | flags, cmd); |
df2c07f4 | 1882 | if (!ovs_header) |
f0fef760 | 1883 | return -EMSGSIZE; |
c19e6535 | 1884 | |
99769a40 | 1885 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1886 | |
c3cc8c03 DM |
1887 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1888 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
e23775f2 | 1889 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
b147f2e9 JB |
1890 | ovs_vport_name(vport)) || |
1891 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
c3cc8c03 | 1892 | goto nla_put_failure; |
c19e6535 | 1893 | |
b147f2e9 JB |
1894 | #ifdef HAVE_PEERNET2ID_ALLOC |
1895 | if (!net_eq(net, dev_net(vport->dev))) { | |
1896 | int id = peernet2id_alloc(net, dev_net(vport->dev)); | |
1897 | ||
1898 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1899 | goto nla_put_failure; | |
1900 | } | |
1901 | ||
1902 | #endif | |
850b6b3b | 1903 | ovs_vport_get_stats(vport, &vport_stats); |
91b37647 PS |
1904 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1905 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1906 | OVS_VPORT_ATTR_PAD)) | |
c3cc8c03 | 1907 | goto nla_put_failure; |
c19e6535 | 1908 | |
beb1c69a AW |
1909 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1910 | goto nla_put_failure; | |
1911 | ||
850b6b3b | 1912 | err = ovs_vport_get_options(vport, skb); |
f0fef760 BP |
1913 | if (err == -EMSGSIZE) |
1914 | goto error; | |
c19e6535 | 1915 | |
23b48dc1 TG |
1916 | genlmsg_end(skb, ovs_header); |
1917 | return 0; | |
c19e6535 BP |
1918 | |
1919 | nla_put_failure: | |
1920 | err = -EMSGSIZE; | |
f0fef760 | 1921 | error: |
df2c07f4 | 1922 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1923 | return err; |
064af421 BP |
1924 | } |
1925 | ||
d81eef1b JR |
1926 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
1927 | { | |
1928 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
1929 | } | |
1930 | ||
1931 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
b147f2e9 JB |
1932 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
1933 | u32 portid, u32 seq, u8 cmd) | |
064af421 | 1934 | { |
c19e6535 | 1935 | struct sk_buff *skb; |
f0fef760 | 1936 | int retval; |
c19e6535 | 1937 | |
f0fef760 | 1938 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1939 | if (!skb) |
1940 | return ERR_PTR(-ENOMEM); | |
1941 | ||
b147f2e9 | 1942 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd); |
c25ea534 JG |
1943 | BUG_ON(retval < 0); |
1944 | ||
c19e6535 | 1945 | return skb; |
f0fef760 | 1946 | } |
c19e6535 | 1947 | |
cd2a59e9 | 1948 | /* Called with ovs_mutex or RCU read lock. */ |
2a4999f3 | 1949 | static struct vport *lookup_vport(struct net *net, |
f1f60b85 | 1950 | const struct ovs_header *ovs_header, |
df2c07f4 | 1951 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
c19e6535 BP |
1952 | { |
1953 | struct datapath *dp; | |
1954 | struct vport *vport; | |
1955 | ||
b147f2e9 JB |
1956 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
1957 | return ERR_PTR(-EOPNOTSUPP); | |
df2c07f4 | 1958 | if (a[OVS_VPORT_ATTR_NAME]) { |
2a4999f3 | 1959 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ed099e92 | 1960 | if (!vport) |
c19e6535 | 1961 | return ERR_PTR(-ENODEV); |
24ce832d BP |
1962 | if (ovs_header->dp_ifindex && |
1963 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
1964 | return ERR_PTR(-ENODEV); | |
c19e6535 | 1965 | return vport; |
df2c07f4 JP |
1966 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1967 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1968 | |
1969 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1970 | return ERR_PTR(-EFBIG); |
c19e6535 | 1971 | |
2a4999f3 | 1972 | dp = get_dp(net, ovs_header->dp_ifindex); |
c19e6535 BP |
1973 | if (!dp) |
1974 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1975 | |
cd2a59e9 | 1976 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ed099e92 | 1977 | if (!vport) |
17535c57 | 1978 | return ERR_PTR(-ENODEV); |
c19e6535 BP |
1979 | return vport; |
1980 | } else | |
1981 | return ERR_PTR(-EINVAL); | |
b147f2e9 | 1982 | |
064af421 BP |
1983 | } |
1984 | ||
8ce37339 PS |
1985 | /* Called with ovs_mutex */ |
1986 | static void update_headroom(struct datapath *dp) | |
1987 | { | |
1988 | unsigned dev_headroom, max_headroom = 0; | |
1989 | struct net_device *dev; | |
1990 | struct vport *vport; | |
1991 | int i; | |
1992 | ||
1993 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
1994 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { | |
1995 | dev = vport->dev; | |
1996 | dev_headroom = netdev_get_fwd_headroom(dev); | |
1997 | if (dev_headroom > max_headroom) | |
1998 | max_headroom = dev_headroom; | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | dp->max_headroom = max_headroom; | |
2003 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
2004 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) | |
2005 | netdev_set_rx_headroom(vport->dev, max_headroom); | |
2006 | } | |
2007 | ||
df2c07f4 | 2008 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 2009 | { |
f0fef760 | 2010 | struct nlattr **a = info->attrs; |
df2c07f4 | 2011 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 2012 | struct vport_parms parms; |
ed099e92 | 2013 | struct sk_buff *reply; |
c19e6535 | 2014 | struct vport *vport; |
c19e6535 | 2015 | struct datapath *dp; |
b0ec0f27 | 2016 | u32 port_no; |
c19e6535 | 2017 | int err; |
b0ec0f27 | 2018 | |
ea36840f BP |
2019 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2020 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
d81eef1b | 2021 | return -EINVAL; |
b147f2e9 JB |
2022 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2023 | return -EOPNOTSUPP; | |
d81eef1b JR |
2024 | |
2025 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2026 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2027 | if (port_no >= DP_MAX_PORTS) | |
2028 | return -EFBIG; | |
2029 | ||
2030 | reply = ovs_vport_cmd_alloc_info(); | |
2031 | if (!reply) | |
2032 | return -ENOMEM; | |
f0fef760 | 2033 | |
cd2a59e9 | 2034 | ovs_lock(); |
5a38795f | 2035 | restart: |
2a4999f3 | 2036 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
c19e6535 BP |
2037 | err = -ENODEV; |
2038 | if (!dp) | |
d81eef1b | 2039 | goto exit_unlock_free; |
c19e6535 | 2040 | |
d81eef1b | 2041 | if (port_no) { |
cd2a59e9 | 2042 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2043 | err = -EBUSY; |
2044 | if (vport) | |
d81eef1b | 2045 | goto exit_unlock_free; |
c19e6535 BP |
2046 | } else { |
2047 | for (port_no = 1; ; port_no++) { | |
2048 | if (port_no >= DP_MAX_PORTS) { | |
2049 | err = -EFBIG; | |
d81eef1b | 2050 | goto exit_unlock_free; |
c19e6535 | 2051 | } |
cd2a59e9 | 2052 | vport = ovs_vport_ovsl(dp, port_no); |
c19e6535 BP |
2053 | if (!vport) |
2054 | break; | |
51d4d598 | 2055 | } |
064af421 | 2056 | } |
b0ec0f27 | 2057 | |
df2c07f4 JP |
2058 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
2059 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2060 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
2061 | parms.dp = dp; |
2062 | parms.port_no = port_no; | |
beb1c69a | 2063 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
c19e6535 BP |
2064 | |
2065 | vport = new_vport(&parms); | |
2066 | err = PTR_ERR(vport); | |
5a38795f TG |
2067 | if (IS_ERR(vport)) { |
2068 | if (err == -EAGAIN) | |
2069 | goto restart; | |
d81eef1b | 2070 | goto exit_unlock_free; |
5a38795f | 2071 | } |
c19e6535 | 2072 | |
b147f2e9 JB |
2073 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2074 | info->snd_portid, info->snd_seq, 0, | |
2075 | OVS_VPORT_CMD_NEW); | |
d81eef1b | 2076 | BUG_ON(err < 0); |
8ce37339 PS |
2077 | |
2078 | if (netdev_get_fwd_headroom(vport->dev) > dp->max_headroom) | |
2079 | update_headroom(dp); | |
2080 | else | |
2081 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2082 | ||
d81eef1b | 2083 | ovs_unlock(); |
e297c6b7 | 2084 | |
cb25142c | 2085 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2086 | return 0; |
c19e6535 | 2087 | |
d81eef1b | 2088 | exit_unlock_free: |
cd2a59e9 | 2089 | ovs_unlock(); |
d81eef1b | 2090 | kfree_skb(reply); |
c19e6535 | 2091 | return err; |
44e05eca BP |
2092 | } |
2093 | ||
df2c07f4 | 2094 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 2095 | { |
f0fef760 BP |
2096 | struct nlattr **a = info->attrs; |
2097 | struct sk_buff *reply; | |
c19e6535 | 2098 | struct vport *vport; |
c19e6535 | 2099 | int err; |
44e05eca | 2100 | |
d81eef1b JR |
2101 | reply = ovs_vport_cmd_alloc_info(); |
2102 | if (!reply) | |
2103 | return -ENOMEM; | |
2104 | ||
cd2a59e9 | 2105 | ovs_lock(); |
2a4999f3 | 2106 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 BP |
2107 | err = PTR_ERR(vport); |
2108 | if (IS_ERR(vport)) | |
d81eef1b | 2109 | goto exit_unlock_free; |
44e05eca | 2110 | |
6455100f | 2111 | if (a[OVS_VPORT_ATTR_TYPE] && |
17ec1d04 | 2112 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
4879d4c7 | 2113 | err = -EINVAL; |
d81eef1b | 2114 | goto exit_unlock_free; |
c25ea534 JG |
2115 | } |
2116 | ||
17ec1d04 | 2117 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
850b6b3b | 2118 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
17ec1d04 | 2119 | if (err) |
d81eef1b | 2120 | goto exit_unlock_free; |
17ec1d04 | 2121 | } |
1fc7083d | 2122 | |
beb1c69a | 2123 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
7d16c847 PS |
2124 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
2125 | ||
2126 | err = ovs_vport_set_upcall_portids(vport, ids); | |
beb1c69a AW |
2127 | if (err) |
2128 | goto exit_unlock_free; | |
2129 | } | |
c19e6535 | 2130 | |
b147f2e9 JB |
2131 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2132 | info->snd_portid, info->snd_seq, 0, | |
229486c2 | 2133 | OVS_VPORT_CMD_SET); |
c25ea534 | 2134 | BUG_ON(err < 0); |
cd2a59e9 | 2135 | ovs_unlock(); |
d81eef1b | 2136 | |
cb25142c | 2137 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
c25ea534 JG |
2138 | return 0; |
2139 | ||
d81eef1b | 2140 | exit_unlock_free: |
cd2a59e9 | 2141 | ovs_unlock(); |
d81eef1b | 2142 | kfree_skb(reply); |
c19e6535 | 2143 | return err; |
064af421 BP |
2144 | } |
2145 | ||
df2c07f4 | 2146 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2147 | { |
8ce37339 | 2148 | bool must_update_headroom = false; |
f0fef760 BP |
2149 | struct nlattr **a = info->attrs; |
2150 | struct sk_buff *reply; | |
8ce37339 | 2151 | struct datapath *dp; |
c19e6535 | 2152 | struct vport *vport; |
c19e6535 BP |
2153 | int err; |
2154 | ||
d81eef1b JR |
2155 | reply = ovs_vport_cmd_alloc_info(); |
2156 | if (!reply) | |
2157 | return -ENOMEM; | |
2158 | ||
cd2a59e9 | 2159 | ovs_lock(); |
2a4999f3 | 2160 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
c19e6535 | 2161 | err = PTR_ERR(vport); |
f0fef760 | 2162 | if (IS_ERR(vport)) |
d81eef1b | 2163 | goto exit_unlock_free; |
c19e6535 | 2164 | |
df2c07f4 | 2165 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 | 2166 | err = -EINVAL; |
d81eef1b | 2167 | goto exit_unlock_free; |
f0fef760 BP |
2168 | } |
2169 | ||
b147f2e9 JB |
2170 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2171 | info->snd_portid, info->snd_seq, 0, | |
2172 | OVS_VPORT_CMD_DEL); | |
d81eef1b | 2173 | BUG_ON(err < 0); |
8ce37339 PS |
2174 | |
2175 | /* the vport deletion may trigger dp headroom update */ | |
2176 | dp = vport->dp; | |
2177 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
2178 | must_update_headroom = true; | |
2179 | netdev_reset_rx_headroom(vport->dev); | |
850b6b3b | 2180 | ovs_dp_detach_port(vport); |
8ce37339 PS |
2181 | |
2182 | if (must_update_headroom) | |
2183 | update_headroom(dp); | |
2184 | ||
d81eef1b | 2185 | ovs_unlock(); |
f0fef760 | 2186 | |
cb25142c | 2187 | ovs_notify(&dp_vport_genl_family, &ovs_dp_vport_multicast_group, reply, info); |
d81eef1b | 2188 | return 0; |
f0fef760 | 2189 | |
d81eef1b | 2190 | exit_unlock_free: |
cd2a59e9 | 2191 | ovs_unlock(); |
d81eef1b | 2192 | kfree_skb(reply); |
c19e6535 | 2193 | return err; |
7c40efc9 BP |
2194 | } |
2195 | ||
df2c07f4 | 2196 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 2197 | { |
f0fef760 | 2198 | struct nlattr **a = info->attrs; |
df2c07f4 | 2199 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 2200 | struct sk_buff *reply; |
c19e6535 | 2201 | struct vport *vport; |
c19e6535 BP |
2202 | int err; |
2203 | ||
d81eef1b JR |
2204 | reply = ovs_vport_cmd_alloc_info(); |
2205 | if (!reply) | |
2206 | return -ENOMEM; | |
2207 | ||
ed099e92 | 2208 | rcu_read_lock(); |
2a4999f3 | 2209 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
c19e6535 BP |
2210 | err = PTR_ERR(vport); |
2211 | if (IS_ERR(vport)) | |
d81eef1b | 2212 | goto exit_unlock_free; |
b147f2e9 JB |
2213 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2214 | info->snd_portid, info->snd_seq, 0, | |
229486c2 | 2215 | OVS_VPORT_CMD_GET); |
d81eef1b | 2216 | BUG_ON(err < 0); |
df2fa9b5 JG |
2217 | rcu_read_unlock(); |
2218 | ||
2219 | return genlmsg_reply(reply, info); | |
ed099e92 | 2220 | |
d81eef1b | 2221 | exit_unlock_free: |
ed099e92 | 2222 | rcu_read_unlock(); |
d81eef1b | 2223 | kfree_skb(reply); |
c19e6535 BP |
2224 | return err; |
2225 | } | |
2226 | ||
df2c07f4 | 2227 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 2228 | { |
df2c07f4 | 2229 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 | 2230 | struct datapath *dp; |
95b1d73a PS |
2231 | int bucket = cb->args[0], skip = cb->args[1]; |
2232 | int i, j = 0; | |
c19e6535 | 2233 | |
03fc2881 | 2234 | rcu_read_lock(); |
01ac0970 | 2235 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
03fc2881 JR |
2236 | if (!dp) { |
2237 | rcu_read_unlock(); | |
f0fef760 | 2238 | return -ENODEV; |
03fc2881 | 2239 | } |
95b1d73a | 2240 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ed099e92 | 2241 | struct vport *vport; |
95b1d73a PS |
2242 | |
2243 | j = 0; | |
f8dfbcb7 | 2244 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
95b1d73a PS |
2245 | if (j >= skip && |
2246 | ovs_vport_cmd_fill_info(vport, skb, | |
b147f2e9 | 2247 | sock_net(skb->sk), |
28aea917 | 2248 | NETLINK_CB(cb->skb).portid, |
95b1d73a PS |
2249 | cb->nlh->nlmsg_seq, |
2250 | NLM_F_MULTI, | |
229486c2 | 2251 | OVS_VPORT_CMD_GET) < 0) |
95b1d73a PS |
2252 | goto out; |
2253 | ||
2254 | j++; | |
2255 | } | |
2256 | skip = 0; | |
c19e6535 | 2257 | } |
95b1d73a | 2258 | out: |
ed099e92 | 2259 | rcu_read_unlock(); |
c19e6535 | 2260 | |
95b1d73a PS |
2261 | cb->args[0] = i; |
2262 | cb->args[1] = j; | |
f0fef760 | 2263 | |
95b1d73a | 2264 | return skb->len; |
7c40efc9 BP |
2265 | } |
2266 | ||
cb25142c PS |
2267 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2268 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2269 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2270 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2271 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
8fc8986d | 2272 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
cb25142c | 2273 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
b147f2e9 JB |
2274 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2275 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
cb25142c PS |
2276 | }; |
2277 | ||
18fd3a52 | 2278 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 2279 | { .cmd = OVS_VPORT_CMD_NEW, |
a6a8674d | 2280 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2281 | .policy = vport_policy, |
df2c07f4 | 2282 | .doit = ovs_vport_cmd_new |
f0fef760 | 2283 | }, |
df2c07f4 | 2284 | { .cmd = OVS_VPORT_CMD_DEL, |
a6a8674d | 2285 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2286 | .policy = vport_policy, |
df2c07f4 | 2287 | .doit = ovs_vport_cmd_del |
f0fef760 | 2288 | }, |
df2c07f4 | 2289 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
2290 | .flags = 0, /* OK for unprivileged users. */ |
2291 | .policy = vport_policy, | |
df2c07f4 JP |
2292 | .doit = ovs_vport_cmd_get, |
2293 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 2294 | }, |
df2c07f4 | 2295 | { .cmd = OVS_VPORT_CMD_SET, |
a6a8674d | 2296 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
f0fef760 | 2297 | .policy = vport_policy, |
df2c07f4 | 2298 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
2299 | }, |
2300 | }; | |
2301 | ||
ba63fe26 | 2302 | struct genl_family dp_vport_genl_family __ro_after_init = { |
cb25142c PS |
2303 | .hdrsize = sizeof(struct ovs_header), |
2304 | .name = OVS_VPORT_FAMILY, | |
2305 | .version = OVS_VPORT_VERSION, | |
2306 | .maxattr = OVS_VPORT_ATTR_MAX, | |
2307 | .netnsok = true, | |
2308 | .parallel_ops = true, | |
2309 | .ops = dp_vport_genl_ops, | |
2310 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2311 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2312 | .n_mcgrps = 1, | |
ba63fe26 | 2313 | .module = THIS_MODULE, |
982b8810 | 2314 | }; |
ed099e92 | 2315 | |
18fd3a52 | 2316 | static struct genl_family *dp_genl_families[] = { |
cb25142c PS |
2317 | &dp_datapath_genl_family, |
2318 | &dp_vport_genl_family, | |
2319 | &dp_flow_genl_family, | |
2320 | &dp_packet_genl_family, | |
1cb57039 | 2321 | &dp_meter_genl_family, |
cb2a5486 YHW |
2322 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2323 | &dp_ct_limit_genl_family, | |
2324 | #endif | |
982b8810 | 2325 | }; |
ed099e92 | 2326 | |
982b8810 BP |
2327 | static void dp_unregister_genl(int n_families) |
2328 | { | |
2329 | int i; | |
ed099e92 | 2330 | |
b867ca75 | 2331 | for (i = 0; i < n_families; i++) |
cb25142c | 2332 | genl_unregister_family(dp_genl_families[i]); |
ed099e92 BP |
2333 | } |
2334 | ||
ba63fe26 | 2335 | static int __init dp_register_genl(void) |
064af421 | 2336 | { |
982b8810 BP |
2337 | int err; |
2338 | int i; | |
064af421 | 2339 | |
982b8810 | 2340 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
064af421 | 2341 | |
cb25142c | 2342 | err = genl_register_family(dp_genl_families[i]); |
982b8810 BP |
2343 | if (err) |
2344 | goto error; | |
982b8810 | 2345 | } |
9cc8b4e4 | 2346 | |
982b8810 | 2347 | return 0; |
064af421 BP |
2348 | |
2349 | error: | |
cb25142c | 2350 | dp_unregister_genl(i); |
982b8810 | 2351 | return err; |
064af421 BP |
2352 | } |
2353 | ||
2a4999f3 PS |
2354 | static int __net_init ovs_init_net(struct net *net) |
2355 | { | |
2356 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2357 | ||
2358 | INIT_LIST_HEAD(&ovs_net->dps); | |
cd2a59e9 | 2359 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
7f4a5d68 | 2360 | ovs_netns_frags_init(net); |
2361 | ovs_netns_frags6_init(net); | |
cb2a5486 | 2362 | return ovs_ct_init(net); |
2a4999f3 PS |
2363 | } |
2364 | ||
cabd5516 PS |
2365 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2366 | struct list_head *head) | |
2a4999f3 PS |
2367 | { |
2368 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
cabd5516 PS |
2369 | struct datapath *dp; |
2370 | ||
2371 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2372 | int i; | |
2373 | ||
2374 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2375 | struct vport *vport; | |
2376 | ||
2377 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
cabd5516 PS |
2378 | |
2379 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) | |
2380 | continue; | |
2381 | ||
e23775f2 | 2382 | if (dev_net(vport->dev) == dnet) |
cabd5516 PS |
2383 | list_add(&vport->detach_list, head); |
2384 | } | |
2385 | } | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2390 | { | |
2391 | struct datapath *dp, *dp_next; | |
2392 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2393 | struct vport *vport, *vport_next; | |
2394 | struct net *net; | |
2395 | LIST_HEAD(head); | |
2a4999f3 | 2396 | |
7f4a5d68 | 2397 | ovs_netns_frags6_exit(dnet); |
2398 | ovs_netns_frags_exit(dnet); | |
038e34ab | 2399 | ovs_ct_exit(dnet); |
cd2a59e9 PS |
2400 | ovs_lock(); |
2401 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) | |
2402 | __dp_destroy(dp); | |
cabd5516 | 2403 | |
3d10a0c8 YHW |
2404 | #ifdef HAVE_NET_RWSEM |
2405 | down_read(&net_rwsem); | |
2406 | #else | |
cabd5516 | 2407 | rtnl_lock(); |
3d10a0c8 | 2408 | #endif |
cabd5516 PS |
2409 | for_each_net(net) |
2410 | list_vports_from_net(net, dnet, &head); | |
3d10a0c8 YHW |
2411 | #ifdef HAVE_NET_RWSEM |
2412 | up_read(&net_rwsem); | |
2413 | #else | |
cabd5516 | 2414 | rtnl_unlock(); |
3d10a0c8 | 2415 | #endif |
cabd5516 PS |
2416 | |
2417 | /* Detach all vports from given namespace. */ | |
2418 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2419 | list_del(&vport->detach_list); | |
2420 | ovs_dp_detach_port(vport); | |
2421 | } | |
2422 | ||
cd2a59e9 PS |
2423 | ovs_unlock(); |
2424 | ||
2425 | cancel_work_sync(&ovs_net->dp_notify_work); | |
2a4999f3 PS |
2426 | } |
2427 | ||
2428 | static struct pernet_operations ovs_net_ops = { | |
2429 | .init = ovs_init_net, | |
2430 | .exit = ovs_exit_net, | |
2431 | .id = &ovs_net_id, | |
2432 | .size = sizeof(struct ovs_net), | |
2433 | }; | |
2434 | ||
22d24ebf BP |
2435 | static int __init dp_init(void) |
2436 | { | |
2437 | int err; | |
2438 | ||
f3d85db3 | 2439 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); |
22d24ebf | 2440 | |
26bfaeaa | 2441 | pr_info("Open vSwitch switching datapath %s\n", VERSION); |
064af421 | 2442 | |
907c26a8 | 2443 | ovs_nsh_init(); |
595e069a JS |
2444 | err = action_fifos_init(); |
2445 | if (err) | |
7f4a5d68 | 2446 | goto error; |
595e069a | 2447 | |
5282e284 | 2448 | err = ovs_internal_dev_rtnl_link_register(); |
2c8c4fb7 AZ |
2449 | if (err) |
2450 | goto error_action_fifos_exit; | |
2451 | ||
5282e284 TG |
2452 | err = ovs_flow_init(); |
2453 | if (err) | |
2454 | goto error_unreg_rtnl_link; | |
2455 | ||
850b6b3b | 2456 | err = ovs_vport_init(); |
064af421 BP |
2457 | if (err) |
2458 | goto error_flow_exit; | |
2459 | ||
2a4999f3 | 2460 | err = register_pernet_device(&ovs_net_ops); |
f2459fe7 JG |
2461 | if (err) |
2462 | goto error_vport_exit; | |
2463 | ||
7f4a5d68 | 2464 | err = compat_init(); |
2a4999f3 PS |
2465 | if (err) |
2466 | goto error_netns_exit; | |
2467 | ||
7f4a5d68 | 2468 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2469 | if (err) | |
2470 | goto error_compat_exit; | |
2471 | ||
5a38795f TG |
2472 | err = ovs_netdev_init(); |
2473 | if (err) | |
2474 | goto error_unreg_notifier; | |
2475 | ||
982b8810 BP |
2476 | err = dp_register_genl(); |
2477 | if (err < 0) | |
5a38795f | 2478 | goto error_unreg_netdev; |
982b8810 | 2479 | |
064af421 BP |
2480 | return 0; |
2481 | ||
5a38795f TG |
2482 | error_unreg_netdev: |
2483 | ovs_netdev_exit(); | |
064af421 | 2484 | error_unreg_notifier: |
850b6b3b | 2485 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2486 | error_compat_exit: |
2487 | compat_exit(); | |
2a4999f3 PS |
2488 | error_netns_exit: |
2489 | unregister_pernet_device(&ovs_net_ops); | |
f2459fe7 | 2490 | error_vport_exit: |
850b6b3b | 2491 | ovs_vport_exit(); |
064af421 | 2492 | error_flow_exit: |
850b6b3b | 2493 | ovs_flow_exit(); |
5282e284 TG |
2494 | error_unreg_rtnl_link: |
2495 | ovs_internal_dev_rtnl_link_unregister(); | |
2c8c4fb7 AZ |
2496 | error_action_fifos_exit: |
2497 | action_fifos_exit(); | |
064af421 | 2498 | error: |
907c26a8 | 2499 | ovs_nsh_cleanup(); |
064af421 BP |
2500 | return err; |
2501 | } | |
2502 | ||
2503 | static void dp_cleanup(void) | |
2504 | { | |
982b8810 | 2505 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
5a38795f | 2506 | ovs_netdev_exit(); |
850b6b3b | 2507 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
7f4a5d68 | 2508 | compat_exit(); |
2a4999f3 PS |
2509 | unregister_pernet_device(&ovs_net_ops); |
2510 | rcu_barrier(); | |
850b6b3b JG |
2511 | ovs_vport_exit(); |
2512 | ovs_flow_exit(); | |
5282e284 | 2513 | ovs_internal_dev_rtnl_link_unregister(); |
2c8c4fb7 | 2514 | action_fifos_exit(); |
907c26a8 | 2515 | ovs_nsh_cleanup(); |
064af421 BP |
2516 | } |
2517 | ||
2518 | module_init(dp_init); | |
2519 | module_exit(dp_cleanup); | |
2520 | ||
2521 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2522 | MODULE_LICENSE("GPL"); | |
3d0666d2 | 2523 | MODULE_VERSION(VERSION); |
75e2077e TLSC |
2524 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2525 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2526 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2527 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
1cb57039 | 2528 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
cb2a5486 | 2529 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |