Commit | Line | Data |
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c9422999 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ccb1352e | 2 | /* |
ad552007 | 3 | * Copyright (c) 2007-2014 Nicira, Inc. |
ccb1352e JG |
4 | */ |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/if_arp.h> | |
11 | #include <linux/if_vlan.h> | |
12 | #include <linux/in.h> | |
13 | #include <linux/ip.h> | |
14 | #include <linux/jhash.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/genetlink.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/mutex.h> | |
22 | #include <linux/percpu.h> | |
23 | #include <linux/rcupdate.h> | |
24 | #include <linux/tcp.h> | |
25 | #include <linux/udp.h> | |
ccb1352e JG |
26 | #include <linux/ethtool.h> |
27 | #include <linux/wait.h> | |
ccb1352e JG |
28 | #include <asm/div64.h> |
29 | #include <linux/highmem.h> | |
30 | #include <linux/netfilter_bridge.h> | |
31 | #include <linux/netfilter_ipv4.h> | |
32 | #include <linux/inetdevice.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/openvswitch.h> | |
35 | #include <linux/rculist.h> | |
36 | #include <linux/dmi.h> | |
ccb1352e | 37 | #include <net/genetlink.h> |
46df7b81 PS |
38 | #include <net/net_namespace.h> |
39 | #include <net/netns/generic.h> | |
ccb1352e JG |
40 | |
41 | #include "datapath.h" | |
42 | #include "flow.h" | |
e80857cc | 43 | #include "flow_table.h" |
e6445719 | 44 | #include "flow_netlink.h" |
96fbc13d | 45 | #include "meter.h" |
ccb1352e | 46 | #include "vport-internal_dev.h" |
cff63a52 | 47 | #include "vport-netdev.h" |
ccb1352e | 48 | |
c7d03a00 | 49 | unsigned int ovs_net_id __read_mostly; |
8e4e1713 | 50 | |
0c200ef9 PS |
51 | static struct genl_family dp_packet_genl_family; |
52 | static struct genl_family dp_flow_genl_family; | |
53 | static struct genl_family dp_datapath_genl_family; | |
54 | ||
74ed7ab9 JS |
55 | static const struct nla_policy flow_policy[]; |
56 | ||
48e48a70 | 57 | static const struct genl_multicast_group ovs_dp_flow_multicast_group = { |
58 | .name = OVS_FLOW_MCGROUP, | |
0c200ef9 PS |
59 | }; |
60 | ||
48e48a70 | 61 | static const struct genl_multicast_group ovs_dp_datapath_multicast_group = { |
62 | .name = OVS_DATAPATH_MCGROUP, | |
0c200ef9 PS |
63 | }; |
64 | ||
48e48a70 | 65 | static const struct genl_multicast_group ovs_dp_vport_multicast_group = { |
66 | .name = OVS_VPORT_MCGROUP, | |
0c200ef9 PS |
67 | }; |
68 | ||
fb5d1e9e JR |
69 | /* Check if need to build a reply message. |
70 | * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */ | |
9b67aa4a SG |
71 | static bool ovs_must_notify(struct genl_family *family, struct genl_info *info, |
72 | unsigned int group) | |
fb5d1e9e JR |
73 | { |
74 | return info->nlhdr->nlmsg_flags & NLM_F_ECHO || | |
f8403a2e | 75 | genl_has_listeners(family, genl_info_net(info), group); |
fb5d1e9e JR |
76 | } |
77 | ||
68eb5503 | 78 | static void ovs_notify(struct genl_family *family, |
2a94fe48 | 79 | struct sk_buff *skb, struct genl_info *info) |
ed661185 | 80 | { |
92c14d9b | 81 | genl_notify(family, skb, info, 0, GFP_KERNEL); |
ed661185 TG |
82 | } |
83 | ||
ccb1352e JG |
84 | /** |
85 | * DOC: Locking: | |
86 | * | |
8e4e1713 PS |
87 | * All writes e.g. Writes to device state (add/remove datapath, port, set |
88 | * operations on vports, etc.), Writes to other state (flow table | |
89 | * modifications, set miscellaneous datapath parameters, etc.) are protected | |
90 | * by ovs_lock. | |
ccb1352e JG |
91 | * |
92 | * Reads are protected by RCU. | |
93 | * | |
94 | * There are a few special cases (mostly stats) that have their own | |
95 | * synchronization but they nest under all of above and don't interact with | |
96 | * each other. | |
8e4e1713 PS |
97 | * |
98 | * The RTNL lock nests inside ovs_mutex. | |
ccb1352e JG |
99 | */ |
100 | ||
8e4e1713 PS |
101 | static DEFINE_MUTEX(ovs_mutex); |
102 | ||
103 | void ovs_lock(void) | |
104 | { | |
105 | mutex_lock(&ovs_mutex); | |
106 | } | |
107 | ||
108 | void ovs_unlock(void) | |
109 | { | |
110 | mutex_unlock(&ovs_mutex); | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_LOCKDEP | |
114 | int lockdep_ovsl_is_held(void) | |
115 | { | |
116 | if (debug_locks) | |
117 | return lockdep_is_held(&ovs_mutex); | |
118 | else | |
119 | return 1; | |
120 | } | |
121 | #endif | |
122 | ||
ccb1352e | 123 | static struct vport *new_vport(const struct vport_parms *); |
8055a89c | 124 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 125 | const struct sw_flow_key *, |
f2a4d086 WT |
126 | const struct dp_upcall_info *, |
127 | uint32_t cutlen); | |
8055a89c | 128 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *, |
e8eedb85 | 129 | const struct sw_flow_key *, |
f2a4d086 WT |
130 | const struct dp_upcall_info *, |
131 | uint32_t cutlen); | |
ccb1352e | 132 | |
eac87c41 EC |
133 | static void ovs_dp_masks_rebalance(struct work_struct *work); |
134 | ||
8e4e1713 | 135 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
971427f3 | 136 | const char *ovs_dp_name(const struct datapath *dp) |
ccb1352e | 137 | { |
8e4e1713 | 138 | struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL); |
c9db965c | 139 | return ovs_vport_name(vport); |
ccb1352e JG |
140 | } |
141 | ||
12eb18f7 | 142 | static int get_dpifindex(const struct datapath *dp) |
ccb1352e JG |
143 | { |
144 | struct vport *local; | |
145 | int ifindex; | |
146 | ||
147 | rcu_read_lock(); | |
148 | ||
15eac2a7 | 149 | local = ovs_vport_rcu(dp, OVSP_LOCAL); |
ccb1352e | 150 | if (local) |
be4ace6e | 151 | ifindex = local->dev->ifindex; |
ccb1352e JG |
152 | else |
153 | ifindex = 0; | |
154 | ||
155 | rcu_read_unlock(); | |
156 | ||
157 | return ifindex; | |
158 | } | |
159 | ||
160 | static void destroy_dp_rcu(struct rcu_head *rcu) | |
161 | { | |
162 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
163 | ||
9b996e54 | 164 | ovs_flow_tbl_destroy(&dp->table); |
ccb1352e | 165 | free_percpu(dp->stats_percpu); |
15eac2a7 | 166 | kfree(dp->ports); |
96fbc13d | 167 | ovs_meters_exit(dp); |
ccb1352e JG |
168 | kfree(dp); |
169 | } | |
170 | ||
15eac2a7 PS |
171 | static struct hlist_head *vport_hash_bucket(const struct datapath *dp, |
172 | u16 port_no) | |
173 | { | |
174 | return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)]; | |
175 | } | |
176 | ||
bb6f9a70 | 177 | /* Called with ovs_mutex or RCU read lock. */ |
15eac2a7 PS |
178 | struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no) |
179 | { | |
180 | struct vport *vport; | |
15eac2a7 PS |
181 | struct hlist_head *head; |
182 | ||
183 | head = vport_hash_bucket(dp, port_no); | |
53742e69 MB |
184 | hlist_for_each_entry_rcu(vport, head, dp_hash_node, |
185 | lockdep_ovsl_is_held()) { | |
15eac2a7 PS |
186 | if (vport->port_no == port_no) |
187 | return vport; | |
188 | } | |
189 | return NULL; | |
190 | } | |
191 | ||
8e4e1713 | 192 | /* Called with ovs_mutex. */ |
ccb1352e JG |
193 | static struct vport *new_vport(const struct vport_parms *parms) |
194 | { | |
195 | struct vport *vport; | |
196 | ||
197 | vport = ovs_vport_add(parms); | |
198 | if (!IS_ERR(vport)) { | |
199 | struct datapath *dp = parms->dp; | |
15eac2a7 | 200 | struct hlist_head *head = vport_hash_bucket(dp, vport->port_no); |
ccb1352e | 201 | |
15eac2a7 | 202 | hlist_add_head_rcu(&vport->dp_hash_node, head); |
ccb1352e | 203 | } |
ccb1352e JG |
204 | return vport; |
205 | } | |
206 | ||
ccb1352e JG |
207 | void ovs_dp_detach_port(struct vport *p) |
208 | { | |
8e4e1713 | 209 | ASSERT_OVSL(); |
ccb1352e JG |
210 | |
211 | /* First drop references to device. */ | |
15eac2a7 | 212 | hlist_del_rcu(&p->dp_hash_node); |
ccb1352e JG |
213 | |
214 | /* Then destroy it. */ | |
215 | ovs_vport_del(p); | |
216 | } | |
217 | ||
218 | /* Must be called with rcu_read_lock. */ | |
8c8b1b83 | 219 | void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 220 | { |
83c8df26 | 221 | const struct vport *p = OVS_CB(skb)->input_vport; |
ccb1352e JG |
222 | struct datapath *dp = p->dp; |
223 | struct sw_flow *flow; | |
d98612b8 | 224 | struct sw_flow_actions *sf_acts; |
ccb1352e | 225 | struct dp_stats_percpu *stats; |
ccb1352e | 226 | u64 *stats_counter; |
1bd7116f | 227 | u32 n_mask_hit; |
9d2f627b | 228 | u32 n_cache_hit; |
aa733660 | 229 | int error; |
ccb1352e | 230 | |
404f2f10 | 231 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 232 | |
ccb1352e | 233 | /* Look up flow. */ |
04b7d136 | 234 | flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb), |
9d2f627b | 235 | &n_mask_hit, &n_cache_hit); |
ccb1352e JG |
236 | if (unlikely(!flow)) { |
237 | struct dp_upcall_info upcall; | |
238 | ||
ccea7445 | 239 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 240 | upcall.cmd = OVS_PACKET_CMD_MISS; |
5cd667b0 | 241 | upcall.portid = ovs_vport_find_upcall_portid(p, skb); |
7f8a436e | 242 | upcall.mru = OVS_CB(skb)->mru; |
f2a4d086 | 243 | error = ovs_dp_upcall(dp, skb, key, &upcall, 0); |
c5eba0b6 LR |
244 | if (unlikely(error)) |
245 | kfree_skb(skb); | |
246 | else | |
247 | consume_skb(skb); | |
ccb1352e JG |
248 | stats_counter = &stats->n_missed; |
249 | goto out; | |
250 | } | |
251 | ||
d98612b8 LJ |
252 | ovs_flow_stats_update(flow, key->tp.flags, skb); |
253 | sf_acts = rcu_dereference(flow->sf_acts); | |
aa733660 YS |
254 | error = ovs_execute_actions(dp, skb, sf_acts, key); |
255 | if (unlikely(error)) | |
256 | net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n", | |
257 | ovs_dp_name(dp), error); | |
ccb1352e | 258 | |
e298e505 | 259 | stats_counter = &stats->n_hit; |
ccb1352e JG |
260 | |
261 | out: | |
262 | /* Update datapath statistics. */ | |
df9d9fdf | 263 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 264 | (*stats_counter)++; |
1bd7116f | 265 | stats->n_mask_hit += n_mask_hit; |
9d2f627b | 266 | stats->n_cache_hit += n_cache_hit; |
df9d9fdf | 267 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
268 | } |
269 | ||
ccb1352e | 270 | int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 271 | const struct sw_flow_key *key, |
f2a4d086 WT |
272 | const struct dp_upcall_info *upcall_info, |
273 | uint32_t cutlen) | |
ccb1352e JG |
274 | { |
275 | struct dp_stats_percpu *stats; | |
ccb1352e JG |
276 | int err; |
277 | ||
15e47304 | 278 | if (upcall_info->portid == 0) { |
ccb1352e JG |
279 | err = -ENOTCONN; |
280 | goto err; | |
281 | } | |
282 | ||
ccb1352e | 283 | if (!skb_is_gso(skb)) |
f2a4d086 | 284 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e | 285 | else |
f2a4d086 | 286 | err = queue_gso_packets(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
287 | if (err) |
288 | goto err; | |
289 | ||
290 | return 0; | |
291 | ||
292 | err: | |
404f2f10 | 293 | stats = this_cpu_ptr(dp->stats_percpu); |
ccb1352e | 294 | |
df9d9fdf | 295 | u64_stats_update_begin(&stats->syncp); |
ccb1352e | 296 | stats->n_lost++; |
df9d9fdf | 297 | u64_stats_update_end(&stats->syncp); |
ccb1352e JG |
298 | |
299 | return err; | |
300 | } | |
301 | ||
8055a89c | 302 | static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 303 | const struct sw_flow_key *key, |
f2a4d086 WT |
304 | const struct dp_upcall_info *upcall_info, |
305 | uint32_t cutlen) | |
ccb1352e | 306 | { |
2734166e | 307 | unsigned int gso_type = skb_shinfo(skb)->gso_type; |
0c19f846 | 308 | struct sw_flow_key later_key; |
ccb1352e JG |
309 | struct sk_buff *segs, *nskb; |
310 | int err; | |
311 | ||
a08e7fd9 | 312 | BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_GSO_CB_OFFSET); |
09c5e605 | 313 | segs = __skb_gso_segment(skb, NETIF_F_SG, false); |
92e5dfc3 PS |
314 | if (IS_ERR(segs)) |
315 | return PTR_ERR(segs); | |
330966e5 FW |
316 | if (segs == NULL) |
317 | return -EINVAL; | |
ccb1352e | 318 | |
0c19f846 WB |
319 | if (gso_type & SKB_GSO_UDP) { |
320 | /* The initial flow key extracted by ovs_flow_key_extract() | |
321 | * in this case is for a first fragment, so we need to | |
322 | * properly mark later fragments. | |
323 | */ | |
324 | later_key = *key; | |
325 | later_key.ip.frag = OVS_FRAG_TYPE_LATER; | |
326 | } | |
327 | ||
ccb1352e | 328 | /* Queue all of the segments. */ |
2cec4448 | 329 | skb_list_walk_safe(segs, skb, nskb) { |
0c19f846 WB |
330 | if (gso_type & SKB_GSO_UDP && skb != segs) |
331 | key = &later_key; | |
332 | ||
f2a4d086 | 333 | err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen); |
ccb1352e JG |
334 | if (err) |
335 | break; | |
336 | ||
2cec4448 | 337 | } |
ccb1352e JG |
338 | |
339 | /* Free all of the segments. */ | |
2cec4448 | 340 | skb_list_walk_safe(segs, skb, nskb) { |
ccb1352e JG |
341 | if (err) |
342 | kfree_skb(skb); | |
343 | else | |
344 | consume_skb(skb); | |
2cec4448 | 345 | } |
ccb1352e JG |
346 | return err; |
347 | } | |
348 | ||
8f0aad6f | 349 | static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info, |
494bea39 | 350 | unsigned int hdrlen, int actions_attrlen) |
c3ff8cfe TG |
351 | { |
352 | size_t size = NLMSG_ALIGN(sizeof(struct ovs_header)) | |
bda56f14 | 353 | + nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */ |
b95e5928 | 354 | + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */ |
bd1903b7 TZ |
355 | + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */ |
356 | + nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */ | |
c3ff8cfe TG |
357 | |
358 | /* OVS_PACKET_ATTR_USERDATA */ | |
8f0aad6f WZ |
359 | if (upcall_info->userdata) |
360 | size += NLA_ALIGN(upcall_info->userdata->nla_len); | |
361 | ||
362 | /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ | |
363 | if (upcall_info->egress_tun_info) | |
364 | size += nla_total_size(ovs_tun_key_attr_size()); | |
c3ff8cfe | 365 | |
ccea7445 NM |
366 | /* OVS_PACKET_ATTR_ACTIONS */ |
367 | if (upcall_info->actions_len) | |
494bea39 | 368 | size += nla_total_size(actions_attrlen); |
ccea7445 | 369 | |
7f8a436e JS |
370 | /* OVS_PACKET_ATTR_MRU */ |
371 | if (upcall_info->mru) | |
372 | size += nla_total_size(sizeof(upcall_info->mru)); | |
373 | ||
c3ff8cfe TG |
374 | return size; |
375 | } | |
376 | ||
7f8a436e JS |
377 | static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
378 | { | |
379 | if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { | |
380 | size_t plen = NLA_ALIGN(skb->len) - skb->len; | |
381 | ||
382 | if (plen > 0) | |
b080db58 | 383 | skb_put_zero(skb, plen); |
7f8a436e JS |
384 | } |
385 | } | |
386 | ||
8055a89c | 387 | static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb, |
e8eedb85 | 388 | const struct sw_flow_key *key, |
f2a4d086 WT |
389 | const struct dp_upcall_info *upcall_info, |
390 | uint32_t cutlen) | |
ccb1352e JG |
391 | { |
392 | struct ovs_header *upcall; | |
393 | struct sk_buff *nskb = NULL; | |
4ee45ea0 | 394 | struct sk_buff *user_skb = NULL; /* to be queued to userspace */ |
ccb1352e | 395 | struct nlattr *nla; |
795449d8 | 396 | size_t len; |
bda56f14 | 397 | unsigned int hlen; |
8055a89c | 398 | int err, dp_ifindex; |
bd1903b7 | 399 | u64 hash; |
8055a89c TG |
400 | |
401 | dp_ifindex = get_dpifindex(dp); | |
402 | if (!dp_ifindex) | |
403 | return -ENODEV; | |
ccb1352e | 404 | |
df8a39de | 405 | if (skb_vlan_tag_present(skb)) { |
ccb1352e JG |
406 | nskb = skb_clone(skb, GFP_ATOMIC); |
407 | if (!nskb) | |
408 | return -ENOMEM; | |
409 | ||
5968250c | 410 | nskb = __vlan_hwaccel_push_inside(nskb); |
8aa51d64 | 411 | if (!nskb) |
ccb1352e JG |
412 | return -ENOMEM; |
413 | ||
ccb1352e JG |
414 | skb = nskb; |
415 | } | |
416 | ||
417 | if (nla_attr_size(skb->len) > USHRT_MAX) { | |
418 | err = -EFBIG; | |
419 | goto out; | |
420 | } | |
421 | ||
bda56f14 TG |
422 | /* Complete checksum if needed */ |
423 | if (skb->ip_summed == CHECKSUM_PARTIAL && | |
7529390d | 424 | (err = skb_csum_hwoffload_help(skb, 0))) |
bda56f14 TG |
425 | goto out; |
426 | ||
427 | /* Older versions of OVS user space enforce alignment of the last | |
428 | * Netlink attribute to NLA_ALIGNTO which would require extensive | |
429 | * padding logic. Only perform zerocopy if padding is not required. | |
430 | */ | |
431 | if (dp->user_features & OVS_DP_F_UNALIGNED) | |
432 | hlen = skb_zerocopy_headlen(skb); | |
433 | else | |
434 | hlen = skb->len; | |
435 | ||
494bea39 LZ |
436 | len = upcall_msg_size(upcall_info, hlen - cutlen, |
437 | OVS_CB(skb)->acts_origlen); | |
551ddc05 | 438 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
ccb1352e JG |
439 | if (!user_skb) { |
440 | err = -ENOMEM; | |
441 | goto out; | |
442 | } | |
443 | ||
444 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, | |
445 | 0, upcall_info->cmd); | |
6f19893b KL |
446 | if (!upcall) { |
447 | err = -EINVAL; | |
448 | goto out; | |
449 | } | |
ccb1352e JG |
450 | upcall->dp_ifindex = dp_ifindex; |
451 | ||
5b4237bb | 452 | err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb); |
a734d1f4 EC |
453 | if (err) |
454 | goto out; | |
ccb1352e JG |
455 | |
456 | if (upcall_info->userdata) | |
4490108b BP |
457 | __nla_put(user_skb, OVS_PACKET_ATTR_USERDATA, |
458 | nla_len(upcall_info->userdata), | |
459 | nla_data(upcall_info->userdata)); | |
ccb1352e | 460 | |
8f0aad6f | 461 | if (upcall_info->egress_tun_info) { |
ae0be8de MK |
462 | nla = nla_nest_start_noflag(user_skb, |
463 | OVS_PACKET_ATTR_EGRESS_TUN_KEY); | |
0fff9bd4 KL |
464 | if (!nla) { |
465 | err = -EMSGSIZE; | |
466 | goto out; | |
467 | } | |
fc4099f1 PS |
468 | err = ovs_nla_put_tunnel_info(user_skb, |
469 | upcall_info->egress_tun_info); | |
a734d1f4 EC |
470 | if (err) |
471 | goto out; | |
472 | ||
8f0aad6f WZ |
473 | nla_nest_end(user_skb, nla); |
474 | } | |
475 | ||
ccea7445 | 476 | if (upcall_info->actions_len) { |
ae0be8de | 477 | nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS); |
0fff9bd4 KL |
478 | if (!nla) { |
479 | err = -EMSGSIZE; | |
480 | goto out; | |
481 | } | |
ccea7445 NM |
482 | err = ovs_nla_put_actions(upcall_info->actions, |
483 | upcall_info->actions_len, | |
484 | user_skb); | |
485 | if (!err) | |
486 | nla_nest_end(user_skb, nla); | |
487 | else | |
488 | nla_nest_cancel(user_skb, nla); | |
489 | } | |
490 | ||
7f8a436e | 491 | /* Add OVS_PACKET_ATTR_MRU */ |
61ca533c TZ |
492 | if (upcall_info->mru && |
493 | nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) { | |
494 | err = -ENOBUFS; | |
495 | goto out; | |
7f8a436e JS |
496 | } |
497 | ||
b95e5928 | 498 | /* Add OVS_PACKET_ATTR_LEN when packet is truncated */ |
61ca533c TZ |
499 | if (cutlen > 0 && |
500 | nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) { | |
501 | err = -ENOBUFS; | |
502 | goto out; | |
b95e5928 WT |
503 | } |
504 | ||
bd1903b7 TZ |
505 | /* Add OVS_PACKET_ATTR_HASH */ |
506 | hash = skb_get_hash_raw(skb); | |
507 | if (skb->sw_hash) | |
508 | hash |= OVS_PACKET_HASH_SW_BIT; | |
509 | ||
510 | if (skb->l4_hash) | |
511 | hash |= OVS_PACKET_HASH_L4_BIT; | |
512 | ||
513 | if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) { | |
514 | err = -ENOBUFS; | |
515 | goto out; | |
516 | } | |
517 | ||
bda56f14 TG |
518 | /* Only reserve room for attribute header, packet data is added |
519 | * in skb_zerocopy() */ | |
520 | if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) { | |
521 | err = -ENOBUFS; | |
522 | goto out; | |
523 | } | |
f2a4d086 | 524 | nla->nla_len = nla_attr_size(skb->len - cutlen); |
ccb1352e | 525 | |
f2a4d086 | 526 | err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen); |
36d5fe6a ZK |
527 | if (err) |
528 | goto out; | |
ccb1352e | 529 | |
aea0bb4f | 530 | /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */ |
7f8a436e | 531 | pad_packet(dp, user_skb); |
aea0bb4f | 532 | |
bda56f14 | 533 | ((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len; |
ccb1352e | 534 | |
bda56f14 | 535 | err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid); |
4ee45ea0 | 536 | user_skb = NULL; |
ccb1352e | 537 | out: |
36d5fe6a ZK |
538 | if (err) |
539 | skb_tx_error(skb); | |
4ee45ea0 | 540 | kfree_skb(user_skb); |
ccb1352e JG |
541 | kfree_skb(nskb); |
542 | return err; | |
543 | } | |
544 | ||
ccb1352e JG |
545 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
546 | { | |
547 | struct ovs_header *ovs_header = info->userhdr; | |
7f8a436e | 548 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
549 | struct nlattr **a = info->attrs; |
550 | struct sw_flow_actions *acts; | |
551 | struct sk_buff *packet; | |
552 | struct sw_flow *flow; | |
d98612b8 | 553 | struct sw_flow_actions *sf_acts; |
ccb1352e | 554 | struct datapath *dp; |
83c8df26 | 555 | struct vport *input_vport; |
7f8a436e | 556 | u16 mru = 0; |
bd1903b7 | 557 | u64 hash; |
ccb1352e JG |
558 | int len; |
559 | int err; | |
1ba39804 | 560 | bool log = !a[OVS_PACKET_ATTR_PROBE]; |
ccb1352e JG |
561 | |
562 | err = -EINVAL; | |
563 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || | |
dded45fc | 564 | !a[OVS_PACKET_ATTR_ACTIONS]) |
ccb1352e JG |
565 | goto err; |
566 | ||
567 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); | |
568 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); | |
569 | err = -ENOMEM; | |
570 | if (!packet) | |
571 | goto err; | |
572 | skb_reserve(packet, NET_IP_ALIGN); | |
573 | ||
32686a9d | 574 | nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len); |
ccb1352e | 575 | |
7f8a436e JS |
576 | /* Set packet's mru */ |
577 | if (a[OVS_PACKET_ATTR_MRU]) { | |
578 | mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]); | |
579 | packet->ignore_df = 1; | |
580 | } | |
581 | OVS_CB(packet)->mru = mru; | |
582 | ||
bd1903b7 TZ |
583 | if (a[OVS_PACKET_ATTR_HASH]) { |
584 | hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]); | |
585 | ||
586 | __skb_set_hash(packet, hash & 0xFFFFFFFFULL, | |
587 | !!(hash & OVS_PACKET_HASH_SW_BIT), | |
588 | !!(hash & OVS_PACKET_HASH_L4_BIT)); | |
589 | } | |
590 | ||
ccb1352e | 591 | /* Build an sw_flow for sending this packet. */ |
23dabf88 | 592 | flow = ovs_flow_alloc(); |
ccb1352e JG |
593 | err = PTR_ERR(flow); |
594 | if (IS_ERR(flow)) | |
595 | goto err_kfree_skb; | |
596 | ||
c2ac6673 JS |
597 | err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY], |
598 | packet, &flow->key, log); | |
ccb1352e JG |
599 | if (err) |
600 | goto err_flow_free; | |
601 | ||
7f8a436e | 602 | err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS], |
05da5898 | 603 | &flow->key, &acts, log); |
74f84a57 PS |
604 | if (err) |
605 | goto err_flow_free; | |
ccb1352e | 606 | |
f5796684 | 607 | rcu_assign_pointer(flow->sf_acts, acts); |
ccb1352e | 608 | packet->priority = flow->key.phy.priority; |
39c7caeb | 609 | packet->mark = flow->key.phy.skb_mark; |
ccb1352e JG |
610 | |
611 | rcu_read_lock(); | |
7f8a436e | 612 | dp = get_dp_rcu(net, ovs_header->dp_ifindex); |
ccb1352e JG |
613 | err = -ENODEV; |
614 | if (!dp) | |
615 | goto err_unlock; | |
616 | ||
83c8df26 PS |
617 | input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port); |
618 | if (!input_vport) | |
619 | input_vport = ovs_vport_rcu(dp, OVSP_LOCAL); | |
620 | ||
621 | if (!input_vport) | |
622 | goto err_unlock; | |
623 | ||
7f8a436e | 624 | packet->dev = input_vport->dev; |
83c8df26 | 625 | OVS_CB(packet)->input_vport = input_vport; |
d98612b8 | 626 | sf_acts = rcu_dereference(flow->sf_acts); |
83c8df26 | 627 | |
ccb1352e | 628 | local_bh_disable(); |
d98612b8 | 629 | err = ovs_execute_actions(dp, packet, sf_acts, &flow->key); |
ccb1352e JG |
630 | local_bh_enable(); |
631 | rcu_read_unlock(); | |
632 | ||
03f0d916 | 633 | ovs_flow_free(flow, false); |
ccb1352e JG |
634 | return err; |
635 | ||
636 | err_unlock: | |
637 | rcu_read_unlock(); | |
638 | err_flow_free: | |
03f0d916 | 639 | ovs_flow_free(flow, false); |
ccb1352e JG |
640 | err_kfree_skb: |
641 | kfree_skb(packet); | |
642 | err: | |
643 | return err; | |
644 | } | |
645 | ||
646 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { | |
dded45fc | 647 | [OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN }, |
ccb1352e JG |
648 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, |
649 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
1ba39804 | 650 | [OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG }, |
7f8a436e | 651 | [OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 }, |
b5ab1f1b | 652 | [OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 }, |
ccb1352e JG |
653 | }; |
654 | ||
4534de83 | 655 | static const struct genl_ops dp_packet_genl_ops[] = { |
ccb1352e | 656 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
ef6243ac | 657 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 658 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
659 | .doit = ovs_packet_cmd_execute |
660 | } | |
661 | }; | |
662 | ||
56989f6d | 663 | static struct genl_family dp_packet_genl_family __ro_after_init = { |
0c200ef9 PS |
664 | .hdrsize = sizeof(struct ovs_header), |
665 | .name = OVS_PACKET_FAMILY, | |
666 | .version = OVS_PACKET_VERSION, | |
667 | .maxattr = OVS_PACKET_ATTR_MAX, | |
3b0f31f2 | 668 | .policy = packet_policy, |
0c200ef9 PS |
669 | .netnsok = true, |
670 | .parallel_ops = true, | |
671 | .ops = dp_packet_genl_ops, | |
672 | .n_ops = ARRAY_SIZE(dp_packet_genl_ops), | |
489111e5 | 673 | .module = THIS_MODULE, |
0c200ef9 PS |
674 | }; |
675 | ||
12eb18f7 | 676 | static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats, |
1bd7116f | 677 | struct ovs_dp_megaflow_stats *mega_stats) |
ccb1352e JG |
678 | { |
679 | int i; | |
ccb1352e | 680 | |
1bd7116f AZ |
681 | memset(mega_stats, 0, sizeof(*mega_stats)); |
682 | ||
b637e498 | 683 | stats->n_flows = ovs_flow_tbl_count(&dp->table); |
1bd7116f | 684 | mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table); |
ccb1352e JG |
685 | |
686 | stats->n_hit = stats->n_missed = stats->n_lost = 0; | |
1bd7116f | 687 | |
ccb1352e JG |
688 | for_each_possible_cpu(i) { |
689 | const struct dp_stats_percpu *percpu_stats; | |
690 | struct dp_stats_percpu local_stats; | |
691 | unsigned int start; | |
692 | ||
693 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); | |
694 | ||
695 | do { | |
57a7744e | 696 | start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); |
ccb1352e | 697 | local_stats = *percpu_stats; |
57a7744e | 698 | } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start)); |
ccb1352e JG |
699 | |
700 | stats->n_hit += local_stats.n_hit; | |
701 | stats->n_missed += local_stats.n_missed; | |
702 | stats->n_lost += local_stats.n_lost; | |
1bd7116f | 703 | mega_stats->n_mask_hit += local_stats.n_mask_hit; |
9d2f627b | 704 | mega_stats->n_cache_hit += local_stats.n_cache_hit; |
ccb1352e JG |
705 | } |
706 | } | |
707 | ||
74ed7ab9 JS |
708 | static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags) |
709 | { | |
710 | return ovs_identifier_is_ufid(sfid) && | |
711 | !(ufid_flags & OVS_UFID_F_OMIT_KEY); | |
712 | } | |
713 | ||
714 | static bool should_fill_mask(uint32_t ufid_flags) | |
715 | { | |
716 | return !(ufid_flags & OVS_UFID_F_OMIT_MASK); | |
717 | } | |
718 | ||
719 | static bool should_fill_actions(uint32_t ufid_flags) | |
c3ff8cfe | 720 | { |
74ed7ab9 JS |
721 | return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS); |
722 | } | |
723 | ||
724 | static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, | |
725 | const struct sw_flow_id *sfid, | |
726 | uint32_t ufid_flags) | |
727 | { | |
728 | size_t len = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
729 | ||
4e81c0b3 PA |
730 | /* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback |
731 | * see ovs_nla_put_identifier() | |
732 | */ | |
74ed7ab9 JS |
733 | if (sfid && ovs_identifier_is_ufid(sfid)) |
734 | len += nla_total_size(sfid->ufid_len); | |
4e81c0b3 PA |
735 | else |
736 | len += nla_total_size(ovs_key_attr_size()); | |
74ed7ab9 JS |
737 | |
738 | /* OVS_FLOW_ATTR_KEY */ | |
739 | if (!sfid || should_fill_key(sfid, ufid_flags)) | |
740 | len += nla_total_size(ovs_key_attr_size()); | |
741 | ||
742 | /* OVS_FLOW_ATTR_MASK */ | |
743 | if (should_fill_mask(ufid_flags)) | |
744 | len += nla_total_size(ovs_key_attr_size()); | |
745 | ||
746 | /* OVS_FLOW_ATTR_ACTIONS */ | |
747 | if (should_fill_actions(ufid_flags)) | |
8e2fed1c | 748 | len += nla_total_size(acts->orig_len); |
74ed7ab9 JS |
749 | |
750 | return len | |
66c7a5ee | 751 | + nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ |
c3ff8cfe | 752 | + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */ |
66c7a5ee | 753 | + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */ |
c3ff8cfe TG |
754 | } |
755 | ||
ca7105f2 JS |
756 | /* Called with ovs_mutex or RCU read lock. */ |
757 | static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow, | |
758 | struct sk_buff *skb) | |
759 | { | |
760 | struct ovs_flow_stats stats; | |
761 | __be16 tcp_flags; | |
762 | unsigned long used; | |
ccb1352e | 763 | |
e298e505 | 764 | ovs_flow_stats_get(flow, &stats, &used, &tcp_flags); |
0e9796b4 | 765 | |
028d6a67 | 766 | if (used && |
0238b720 ND |
767 | nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used), |
768 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 769 | return -EMSGSIZE; |
ccb1352e | 770 | |
028d6a67 | 771 | if (stats.n_packets && |
66c7a5ee ND |
772 | nla_put_64bit(skb, OVS_FLOW_ATTR_STATS, |
773 | sizeof(struct ovs_flow_stats), &stats, | |
774 | OVS_FLOW_ATTR_PAD)) | |
ca7105f2 | 775 | return -EMSGSIZE; |
ccb1352e | 776 | |
e298e505 PS |
777 | if ((u8)ntohs(tcp_flags) && |
778 | nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags))) | |
ca7105f2 JS |
779 | return -EMSGSIZE; |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | /* Called with ovs_mutex or RCU read lock. */ | |
785 | static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow, | |
786 | struct sk_buff *skb, int skb_orig_len) | |
787 | { | |
788 | struct nlattr *start; | |
789 | int err; | |
ccb1352e JG |
790 | |
791 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if | |
792 | * this is the first flow to be dumped into 'skb'. This is unusual for | |
793 | * Netlink but individual action lists can be longer than | |
794 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
795 | * The userspace caller can always fetch the actions separately if it | |
796 | * really wants them. (Most userspace callers in fact don't care.) | |
797 | * | |
798 | * This can only fail for dump operations because the skb is always | |
799 | * properly sized for single flows. | |
800 | */ | |
ae0be8de | 801 | start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS); |
74f84a57 | 802 | if (start) { |
d57170b1 PS |
803 | const struct sw_flow_actions *sf_acts; |
804 | ||
663efa36 | 805 | sf_acts = rcu_dereference_ovsl(flow->sf_acts); |
e6445719 PS |
806 | err = ovs_nla_put_actions(sf_acts->actions, |
807 | sf_acts->actions_len, skb); | |
0e9796b4 | 808 | |
74f84a57 PS |
809 | if (!err) |
810 | nla_nest_end(skb, start); | |
811 | else { | |
812 | if (skb_orig_len) | |
ca7105f2 | 813 | return err; |
74f84a57 PS |
814 | |
815 | nla_nest_cancel(skb, start); | |
816 | } | |
ca7105f2 JS |
817 | } else if (skb_orig_len) { |
818 | return -EMSGSIZE; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | /* Called with ovs_mutex or RCU read lock. */ | |
825 | static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex, | |
826 | struct sk_buff *skb, u32 portid, | |
74ed7ab9 | 827 | u32 seq, u32 flags, u8 cmd, u32 ufid_flags) |
ca7105f2 JS |
828 | { |
829 | const int skb_orig_len = skb->len; | |
830 | struct ovs_header *ovs_header; | |
831 | int err; | |
832 | ||
833 | ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family, | |
834 | flags, cmd); | |
835 | if (!ovs_header) | |
836 | return -EMSGSIZE; | |
837 | ||
838 | ovs_header->dp_ifindex = dp_ifindex; | |
839 | ||
74ed7ab9 | 840 | err = ovs_nla_put_identifier(flow, skb); |
5b4237bb JS |
841 | if (err) |
842 | goto error; | |
843 | ||
74ed7ab9 JS |
844 | if (should_fill_key(&flow->id, ufid_flags)) { |
845 | err = ovs_nla_put_masked_key(flow, skb); | |
846 | if (err) | |
847 | goto error; | |
848 | } | |
849 | ||
850 | if (should_fill_mask(ufid_flags)) { | |
851 | err = ovs_nla_put_mask(flow, skb); | |
852 | if (err) | |
853 | goto error; | |
854 | } | |
ca7105f2 JS |
855 | |
856 | err = ovs_flow_cmd_fill_stats(flow, skb); | |
857 | if (err) | |
858 | goto error; | |
859 | ||
74ed7ab9 JS |
860 | if (should_fill_actions(ufid_flags)) { |
861 | err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len); | |
862 | if (err) | |
863 | goto error; | |
864 | } | |
ccb1352e | 865 | |
053c095a JB |
866 | genlmsg_end(skb, ovs_header); |
867 | return 0; | |
ccb1352e | 868 | |
ccb1352e JG |
869 | error: |
870 | genlmsg_cancel(skb, ovs_header); | |
871 | return err; | |
872 | } | |
873 | ||
0e9796b4 JR |
874 | /* May not be called with RCU read lock. */ |
875 | static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts, | |
74ed7ab9 | 876 | const struct sw_flow_id *sfid, |
fb5d1e9e | 877 | struct genl_info *info, |
74ed7ab9 JS |
878 | bool always, |
879 | uint32_t ufid_flags) | |
ccb1352e | 880 | { |
fb5d1e9e | 881 | struct sk_buff *skb; |
74ed7ab9 | 882 | size_t len; |
ccb1352e | 883 | |
9b67aa4a | 884 | if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0)) |
fb5d1e9e JR |
885 | return NULL; |
886 | ||
74ed7ab9 | 887 | len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags); |
551ddc05 | 888 | skb = genlmsg_new(len, GFP_KERNEL); |
fb5d1e9e JR |
889 | if (!skb) |
890 | return ERR_PTR(-ENOMEM); | |
891 | ||
892 | return skb; | |
ccb1352e JG |
893 | } |
894 | ||
0e9796b4 JR |
895 | /* Called with ovs_mutex. */ |
896 | static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow, | |
897 | int dp_ifindex, | |
898 | struct genl_info *info, u8 cmd, | |
74ed7ab9 | 899 | bool always, u32 ufid_flags) |
ccb1352e JG |
900 | { |
901 | struct sk_buff *skb; | |
902 | int retval; | |
903 | ||
74ed7ab9 JS |
904 | skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts), |
905 | &flow->id, info, always, ufid_flags); | |
d0e992aa | 906 | if (IS_ERR_OR_NULL(skb)) |
fb5d1e9e | 907 | return skb; |
ccb1352e | 908 | |
0e9796b4 JR |
909 | retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb, |
910 | info->snd_portid, info->snd_seq, 0, | |
74ed7ab9 | 911 | cmd, ufid_flags); |
8ffeb03f PA |
912 | if (WARN_ON_ONCE(retval < 0)) { |
913 | kfree_skb(skb); | |
914 | skb = ERR_PTR(retval); | |
915 | } | |
ccb1352e JG |
916 | return skb; |
917 | } | |
918 | ||
37bdc87b | 919 | static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info) |
ccb1352e | 920 | { |
7f8a436e | 921 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
922 | struct nlattr **a = info->attrs; |
923 | struct ovs_header *ovs_header = info->userhdr; | |
74ed7ab9 | 924 | struct sw_flow *flow = NULL, *new_flow; |
03f0d916 | 925 | struct sw_flow_mask mask; |
ccb1352e JG |
926 | struct sk_buff *reply; |
927 | struct datapath *dp; | |
37bdc87b | 928 | struct sw_flow_actions *acts; |
03f0d916 | 929 | struct sw_flow_match match; |
74ed7ab9 | 930 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); |
ccb1352e | 931 | int error; |
05da5898 | 932 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
ccb1352e | 933 | |
893f139b | 934 | /* Must have key and actions. */ |
ccb1352e | 935 | error = -EINVAL; |
426cda5c | 936 | if (!a[OVS_FLOW_ATTR_KEY]) { |
05da5898 | 937 | OVS_NLERR(log, "Flow key attr not present in new flow."); |
ccb1352e | 938 | goto error; |
426cda5c JG |
939 | } |
940 | if (!a[OVS_FLOW_ATTR_ACTIONS]) { | |
05da5898 | 941 | OVS_NLERR(log, "Flow actions attr not present in new flow."); |
893f139b | 942 | goto error; |
426cda5c | 943 | } |
03f0d916 | 944 | |
893f139b JR |
945 | /* Most of the time we need to allocate a new flow, do it before |
946 | * locking. | |
947 | */ | |
948 | new_flow = ovs_flow_alloc(); | |
949 | if (IS_ERR(new_flow)) { | |
950 | error = PTR_ERR(new_flow); | |
951 | goto error; | |
952 | } | |
953 | ||
954 | /* Extract key. */ | |
2279994d | 955 | ovs_match_init(&match, &new_flow->key, false, &mask); |
c2ac6673 | 956 | error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
05da5898 | 957 | a[OVS_FLOW_ATTR_MASK], log); |
ccb1352e | 958 | if (error) |
893f139b | 959 | goto err_kfree_flow; |
ccb1352e | 960 | |
74ed7ab9 JS |
961 | /* Extract flow identifier. */ |
962 | error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID], | |
190aa3e7 | 963 | &new_flow->key, log); |
74ed7ab9 JS |
964 | if (error) |
965 | goto err_kfree_flow; | |
74f84a57 | 966 | |
190aa3e7 | 967 | /* unmasked key is needed to match when ufid is not used. */ |
968 | if (ovs_identifier_is_key(&new_flow->id)) | |
969 | match.key = new_flow->id.unmasked_key; | |
970 | ||
971 | ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask); | |
972 | ||
893f139b | 973 | /* Validate actions. */ |
7f8a436e JS |
974 | error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS], |
975 | &new_flow->key, &acts, log); | |
37bdc87b | 976 | if (error) { |
05da5898 | 977 | OVS_NLERR(log, "Flow actions may not be safe on all matching packets."); |
2fdb957d | 978 | goto err_kfree_flow; |
893f139b JR |
979 | } |
980 | ||
74ed7ab9 JS |
981 | reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false, |
982 | ufid_flags); | |
893f139b JR |
983 | if (IS_ERR(reply)) { |
984 | error = PTR_ERR(reply); | |
985 | goto err_kfree_acts; | |
ccb1352e JG |
986 | } |
987 | ||
8e4e1713 | 988 | ovs_lock(); |
7f8a436e | 989 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
990 | if (unlikely(!dp)) { |
991 | error = -ENODEV; | |
8e4e1713 | 992 | goto err_unlock_ovs; |
893f139b | 993 | } |
74ed7ab9 | 994 | |
03f0d916 | 995 | /* Check if this is a duplicate flow */ |
74ed7ab9 JS |
996 | if (ovs_identifier_is_ufid(&new_flow->id)) |
997 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id); | |
998 | if (!flow) | |
190aa3e7 | 999 | flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key); |
893f139b JR |
1000 | if (likely(!flow)) { |
1001 | rcu_assign_pointer(new_flow->sf_acts, acts); | |
ccb1352e JG |
1002 | |
1003 | /* Put flow in bucket. */ | |
893f139b JR |
1004 | error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask); |
1005 | if (unlikely(error)) { | |
618ed0c8 | 1006 | acts = NULL; |
893f139b JR |
1007 | goto err_unlock_ovs; |
1008 | } | |
1009 | ||
1010 | if (unlikely(reply)) { | |
1011 | error = ovs_flow_cmd_fill_info(new_flow, | |
1012 | ovs_header->dp_ifindex, | |
1013 | reply, info->snd_portid, | |
1014 | info->snd_seq, 0, | |
74ed7ab9 JS |
1015 | OVS_FLOW_CMD_NEW, |
1016 | ufid_flags); | |
893f139b | 1017 | BUG_ON(error < 0); |
618ed0c8 | 1018 | } |
893f139b | 1019 | ovs_unlock(); |
ccb1352e | 1020 | } else { |
37bdc87b JR |
1021 | struct sw_flow_actions *old_acts; |
1022 | ||
ccb1352e JG |
1023 | /* Bail out if we're not allowed to modify an existing flow. |
1024 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1025 | * because Generic Netlink treats the latter as a dump | |
1026 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1027 | * gets fixed. | |
1028 | */ | |
893f139b JR |
1029 | if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE |
1030 | | NLM_F_EXCL))) { | |
1031 | error = -EEXIST; | |
8e4e1713 | 1032 | goto err_unlock_ovs; |
893f139b | 1033 | } |
74ed7ab9 JS |
1034 | /* The flow identifier has to be the same for flow updates. |
1035 | * Look for any overlapping flow. | |
1036 | */ | |
1037 | if (unlikely(!ovs_flow_cmp(flow, &match))) { | |
1038 | if (ovs_identifier_is_key(&flow->id)) | |
1039 | flow = ovs_flow_tbl_lookup_exact(&dp->table, | |
1040 | &match); | |
1041 | else /* UFID matches but key is different */ | |
1042 | flow = NULL; | |
4a46b24e AW |
1043 | if (!flow) { |
1044 | error = -ENOENT; | |
1045 | goto err_unlock_ovs; | |
1046 | } | |
893f139b | 1047 | } |
37bdc87b JR |
1048 | /* Update actions. */ |
1049 | old_acts = ovsl_dereference(flow->sf_acts); | |
1050 | rcu_assign_pointer(flow->sf_acts, acts); | |
37bdc87b | 1051 | |
893f139b JR |
1052 | if (unlikely(reply)) { |
1053 | error = ovs_flow_cmd_fill_info(flow, | |
1054 | ovs_header->dp_ifindex, | |
1055 | reply, info->snd_portid, | |
1056 | info->snd_seq, 0, | |
74ed7ab9 JS |
1057 | OVS_FLOW_CMD_NEW, |
1058 | ufid_flags); | |
893f139b JR |
1059 | BUG_ON(error < 0); |
1060 | } | |
1061 | ovs_unlock(); | |
37bdc87b | 1062 | |
34ae932a | 1063 | ovs_nla_free_flow_actions_rcu(old_acts); |
893f139b | 1064 | ovs_flow_free(new_flow, false); |
37bdc87b | 1065 | } |
893f139b JR |
1066 | |
1067 | if (reply) | |
1068 | ovs_notify(&dp_flow_genl_family, reply, info); | |
37bdc87b JR |
1069 | return 0; |
1070 | ||
37bdc87b JR |
1071 | err_unlock_ovs: |
1072 | ovs_unlock(); | |
893f139b JR |
1073 | kfree_skb(reply); |
1074 | err_kfree_acts: | |
34ae932a | 1075 | ovs_nla_free_flow_actions(acts); |
893f139b JR |
1076 | err_kfree_flow: |
1077 | ovs_flow_free(new_flow, false); | |
37bdc87b JR |
1078 | error: |
1079 | return error; | |
1080 | } | |
ccb1352e | 1081 | |
2fdb957d | 1082 | /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */ |
26063790 | 1083 | static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net, |
7f8a436e | 1084 | const struct nlattr *a, |
6b205b2c | 1085 | const struct sw_flow_key *key, |
05da5898 JR |
1086 | const struct sw_flow_mask *mask, |
1087 | bool log) | |
6b205b2c JG |
1088 | { |
1089 | struct sw_flow_actions *acts; | |
1090 | struct sw_flow_key masked_key; | |
1091 | int error; | |
1092 | ||
ae5f2fb1 | 1093 | ovs_flow_mask_key(&masked_key, key, true, mask); |
7f8a436e | 1094 | error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log); |
6b205b2c | 1095 | if (error) { |
05da5898 JR |
1096 | OVS_NLERR(log, |
1097 | "Actions may not be safe on all matching packets"); | |
6b205b2c JG |
1098 | return ERR_PTR(error); |
1099 | } | |
1100 | ||
1101 | return acts; | |
1102 | } | |
1103 | ||
9cc9a5cb TZ |
1104 | /* Factor out match-init and action-copy to avoid |
1105 | * "Wframe-larger-than=1024" warning. Because mask is only | |
1106 | * used to get actions, we new a function to save some | |
1107 | * stack space. | |
1108 | * | |
1109 | * If there are not key and action attrs, we return 0 | |
1110 | * directly. In the case, the caller will also not use the | |
1111 | * match as before. If there is action attr, we try to get | |
1112 | * actions and save them to *acts. Before returning from | |
1113 | * the function, we reset the match->mask pointer. Because | |
1114 | * we should not to return match object with dangling reference | |
1115 | * to mask. | |
1116 | * */ | |
26063790 AB |
1117 | static noinline_for_stack int |
1118 | ovs_nla_init_match_and_action(struct net *net, | |
1119 | struct sw_flow_match *match, | |
1120 | struct sw_flow_key *key, | |
1121 | struct nlattr **a, | |
1122 | struct sw_flow_actions **acts, | |
1123 | bool log) | |
9cc9a5cb TZ |
1124 | { |
1125 | struct sw_flow_mask mask; | |
1126 | int error = 0; | |
1127 | ||
1128 | if (a[OVS_FLOW_ATTR_KEY]) { | |
1129 | ovs_match_init(match, key, true, &mask); | |
1130 | error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY], | |
1131 | a[OVS_FLOW_ATTR_MASK], log); | |
1132 | if (error) | |
1133 | goto error; | |
1134 | } | |
1135 | ||
1136 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1137 | if (!a[OVS_FLOW_ATTR_KEY]) { | |
1138 | OVS_NLERR(log, | |
1139 | "Flow key attribute not present in set flow."); | |
5829e62a CJ |
1140 | error = -EINVAL; |
1141 | goto error; | |
9cc9a5cb TZ |
1142 | } |
1143 | ||
1144 | *acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key, | |
1145 | &mask, log); | |
1146 | if (IS_ERR(*acts)) { | |
1147 | error = PTR_ERR(*acts); | |
1148 | goto error; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* On success, error is 0. */ | |
1153 | error: | |
1154 | match->mask = NULL; | |
1155 | return error; | |
1156 | } | |
1157 | ||
37bdc87b JR |
1158 | static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info) |
1159 | { | |
7f8a436e | 1160 | struct net *net = sock_net(skb->sk); |
37bdc87b JR |
1161 | struct nlattr **a = info->attrs; |
1162 | struct ovs_header *ovs_header = info->userhdr; | |
6b205b2c | 1163 | struct sw_flow_key key; |
37bdc87b | 1164 | struct sw_flow *flow; |
37bdc87b JR |
1165 | struct sk_buff *reply = NULL; |
1166 | struct datapath *dp; | |
893f139b | 1167 | struct sw_flow_actions *old_acts = NULL, *acts = NULL; |
37bdc87b | 1168 | struct sw_flow_match match; |
74ed7ab9 JS |
1169 | struct sw_flow_id sfid; |
1170 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
6f15cdbf | 1171 | int error = 0; |
05da5898 | 1172 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1173 | bool ufid_present; |
37bdc87b | 1174 | |
74ed7ab9 | 1175 | ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log); |
9cc9a5cb | 1176 | if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) { |
6f15cdbf SG |
1177 | OVS_NLERR(log, |
1178 | "Flow set message rejected, Key attribute missing."); | |
9cc9a5cb | 1179 | return -EINVAL; |
6f15cdbf | 1180 | } |
9cc9a5cb TZ |
1181 | |
1182 | error = ovs_nla_init_match_and_action(net, &match, &key, a, | |
1183 | &acts, log); | |
37bdc87b JR |
1184 | if (error) |
1185 | goto error; | |
1186 | ||
9cc9a5cb | 1187 | if (acts) { |
2fdb957d | 1188 | /* Can allocate before locking if have acts. */ |
74ed7ab9 JS |
1189 | reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false, |
1190 | ufid_flags); | |
893f139b JR |
1191 | if (IS_ERR(reply)) { |
1192 | error = PTR_ERR(reply); | |
1193 | goto err_kfree_acts; | |
be52c9e9 | 1194 | } |
37bdc87b | 1195 | } |
0e9796b4 | 1196 | |
37bdc87b | 1197 | ovs_lock(); |
7f8a436e | 1198 | dp = get_dp(net, ovs_header->dp_ifindex); |
893f139b JR |
1199 | if (unlikely(!dp)) { |
1200 | error = -ENODEV; | |
37bdc87b | 1201 | goto err_unlock_ovs; |
893f139b | 1202 | } |
37bdc87b | 1203 | /* Check that the flow exists. */ |
74ed7ab9 JS |
1204 | if (ufid_present) |
1205 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid); | |
1206 | else | |
1207 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
893f139b JR |
1208 | if (unlikely(!flow)) { |
1209 | error = -ENOENT; | |
37bdc87b | 1210 | goto err_unlock_ovs; |
893f139b | 1211 | } |
4a46b24e | 1212 | |
37bdc87b | 1213 | /* Update actions, if present. */ |
893f139b | 1214 | if (likely(acts)) { |
37bdc87b JR |
1215 | old_acts = ovsl_dereference(flow->sf_acts); |
1216 | rcu_assign_pointer(flow->sf_acts, acts); | |
893f139b JR |
1217 | |
1218 | if (unlikely(reply)) { | |
1219 | error = ovs_flow_cmd_fill_info(flow, | |
1220 | ovs_header->dp_ifindex, | |
1221 | reply, info->snd_portid, | |
1222 | info->snd_seq, 0, | |
804fe108 | 1223 | OVS_FLOW_CMD_SET, |
74ed7ab9 | 1224 | ufid_flags); |
893f139b JR |
1225 | BUG_ON(error < 0); |
1226 | } | |
1227 | } else { | |
1228 | /* Could not alloc without acts before locking. */ | |
1229 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, | |
804fe108 | 1230 | info, OVS_FLOW_CMD_SET, false, |
74ed7ab9 JS |
1231 | ufid_flags); |
1232 | ||
b5ffe634 | 1233 | if (IS_ERR(reply)) { |
893f139b JR |
1234 | error = PTR_ERR(reply); |
1235 | goto err_unlock_ovs; | |
1236 | } | |
ccb1352e | 1237 | } |
37bdc87b | 1238 | |
37bdc87b JR |
1239 | /* Clear stats. */ |
1240 | if (a[OVS_FLOW_ATTR_CLEAR]) | |
1241 | ovs_flow_stats_clear(flow); | |
8e4e1713 | 1242 | ovs_unlock(); |
ccb1352e | 1243 | |
893f139b JR |
1244 | if (reply) |
1245 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1246 | if (old_acts) | |
34ae932a | 1247 | ovs_nla_free_flow_actions_rcu(old_acts); |
fb5d1e9e | 1248 | |
ccb1352e JG |
1249 | return 0; |
1250 | ||
8e4e1713 PS |
1251 | err_unlock_ovs: |
1252 | ovs_unlock(); | |
893f139b JR |
1253 | kfree_skb(reply); |
1254 | err_kfree_acts: | |
34ae932a | 1255 | ovs_nla_free_flow_actions(acts); |
ccb1352e JG |
1256 | error: |
1257 | return error; | |
1258 | } | |
1259 | ||
1260 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1261 | { | |
1262 | struct nlattr **a = info->attrs; | |
1263 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1264 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1265 | struct sw_flow_key key; |
1266 | struct sk_buff *reply; | |
1267 | struct sw_flow *flow; | |
1268 | struct datapath *dp; | |
03f0d916 | 1269 | struct sw_flow_match match; |
74ed7ab9 JS |
1270 | struct sw_flow_id ufid; |
1271 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
1272 | int err = 0; | |
05da5898 | 1273 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1274 | bool ufid_present; |
ccb1352e | 1275 | |
74ed7ab9 JS |
1276 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1277 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1278 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 | 1279 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL, |
74ed7ab9 JS |
1280 | log); |
1281 | } else if (!ufid_present) { | |
05da5898 JR |
1282 | OVS_NLERR(log, |
1283 | "Flow get message rejected, Key attribute missing."); | |
74ed7ab9 | 1284 | err = -EINVAL; |
03f0d916 | 1285 | } |
ccb1352e JG |
1286 | if (err) |
1287 | return err; | |
1288 | ||
8e4e1713 | 1289 | ovs_lock(); |
46df7b81 | 1290 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 PS |
1291 | if (!dp) { |
1292 | err = -ENODEV; | |
1293 | goto unlock; | |
1294 | } | |
ccb1352e | 1295 | |
74ed7ab9 JS |
1296 | if (ufid_present) |
1297 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1298 | else | |
1299 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1300 | if (!flow) { |
8e4e1713 PS |
1301 | err = -ENOENT; |
1302 | goto unlock; | |
1303 | } | |
ccb1352e | 1304 | |
0e9796b4 | 1305 | reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info, |
804fe108 | 1306 | OVS_FLOW_CMD_GET, true, ufid_flags); |
8e4e1713 PS |
1307 | if (IS_ERR(reply)) { |
1308 | err = PTR_ERR(reply); | |
1309 | goto unlock; | |
1310 | } | |
ccb1352e | 1311 | |
8e4e1713 | 1312 | ovs_unlock(); |
ccb1352e | 1313 | return genlmsg_reply(reply, info); |
8e4e1713 PS |
1314 | unlock: |
1315 | ovs_unlock(); | |
1316 | return err; | |
ccb1352e JG |
1317 | } |
1318 | ||
1319 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1320 | { | |
1321 | struct nlattr **a = info->attrs; | |
1322 | struct ovs_header *ovs_header = info->userhdr; | |
c2ac6673 | 1323 | struct net *net = sock_net(skb->sk); |
ccb1352e JG |
1324 | struct sw_flow_key key; |
1325 | struct sk_buff *reply; | |
74ed7ab9 | 1326 | struct sw_flow *flow = NULL; |
ccb1352e | 1327 | struct datapath *dp; |
03f0d916 | 1328 | struct sw_flow_match match; |
74ed7ab9 JS |
1329 | struct sw_flow_id ufid; |
1330 | u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1331 | int err; |
05da5898 | 1332 | bool log = !a[OVS_FLOW_ATTR_PROBE]; |
74ed7ab9 | 1333 | bool ufid_present; |
ccb1352e | 1334 | |
74ed7ab9 JS |
1335 | ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log); |
1336 | if (a[OVS_FLOW_ATTR_KEY]) { | |
2279994d | 1337 | ovs_match_init(&match, &key, true, NULL); |
c2ac6673 JS |
1338 | err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], |
1339 | NULL, log); | |
aed06778 JR |
1340 | if (unlikely(err)) |
1341 | return err; | |
1342 | } | |
1343 | ||
8e4e1713 | 1344 | ovs_lock(); |
46df7b81 | 1345 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
aed06778 | 1346 | if (unlikely(!dp)) { |
8e4e1713 PS |
1347 | err = -ENODEV; |
1348 | goto unlock; | |
1349 | } | |
46df7b81 | 1350 | |
74ed7ab9 | 1351 | if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) { |
b637e498 | 1352 | err = ovs_flow_tbl_flush(&dp->table); |
8e4e1713 PS |
1353 | goto unlock; |
1354 | } | |
03f0d916 | 1355 | |
74ed7ab9 JS |
1356 | if (ufid_present) |
1357 | flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid); | |
1358 | else | |
1359 | flow = ovs_flow_tbl_lookup_exact(&dp->table, &match); | |
4a46b24e | 1360 | if (unlikely(!flow)) { |
8e4e1713 PS |
1361 | err = -ENOENT; |
1362 | goto unlock; | |
1363 | } | |
ccb1352e | 1364 | |
b637e498 | 1365 | ovs_flow_tbl_remove(&dp->table, flow); |
aed06778 | 1366 | ovs_unlock(); |
ccb1352e | 1367 | |
aed06778 | 1368 | reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts, |
74ed7ab9 | 1369 | &flow->id, info, false, ufid_flags); |
aed06778 | 1370 | if (likely(reply)) { |
b90f5aa4 | 1371 | if (!IS_ERR(reply)) { |
aed06778 JR |
1372 | rcu_read_lock(); /*To keep RCU checker happy. */ |
1373 | err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, | |
1374 | reply, info->snd_portid, | |
1375 | info->snd_seq, 0, | |
74ed7ab9 JS |
1376 | OVS_FLOW_CMD_DEL, |
1377 | ufid_flags); | |
aed06778 | 1378 | rcu_read_unlock(); |
8a574f86 PA |
1379 | if (WARN_ON_ONCE(err < 0)) { |
1380 | kfree_skb(reply); | |
1381 | goto out_free; | |
1382 | } | |
aed06778 JR |
1383 | |
1384 | ovs_notify(&dp_flow_genl_family, reply, info); | |
1385 | } else { | |
1386 | netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply)); | |
1387 | } | |
fb5d1e9e | 1388 | } |
ccb1352e | 1389 | |
8a574f86 | 1390 | out_free: |
aed06778 | 1391 | ovs_flow_free(flow, true); |
ccb1352e | 1392 | return 0; |
8e4e1713 PS |
1393 | unlock: |
1394 | ovs_unlock(); | |
1395 | return err; | |
ccb1352e JG |
1396 | } |
1397 | ||
1398 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1399 | { | |
74ed7ab9 | 1400 | struct nlattr *a[__OVS_FLOW_ATTR_MAX]; |
ccb1352e | 1401 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
b637e498 | 1402 | struct table_instance *ti; |
ccb1352e | 1403 | struct datapath *dp; |
74ed7ab9 JS |
1404 | u32 ufid_flags; |
1405 | int err; | |
1406 | ||
8cb08174 JB |
1407 | err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a, |
1408 | OVS_FLOW_ATTR_MAX, flow_policy, NULL); | |
74ed7ab9 JS |
1409 | if (err) |
1410 | return err; | |
1411 | ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]); | |
ccb1352e | 1412 | |
d57170b1 | 1413 | rcu_read_lock(); |
cc3a5ae6 | 1414 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
8e4e1713 | 1415 | if (!dp) { |
d57170b1 | 1416 | rcu_read_unlock(); |
ccb1352e | 1417 | return -ENODEV; |
8e4e1713 | 1418 | } |
ccb1352e | 1419 | |
b637e498 | 1420 | ti = rcu_dereference(dp->table.ti); |
ccb1352e JG |
1421 | for (;;) { |
1422 | struct sw_flow *flow; | |
1423 | u32 bucket, obj; | |
1424 | ||
1425 | bucket = cb->args[0]; | |
1426 | obj = cb->args[1]; | |
b637e498 | 1427 | flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj); |
ccb1352e JG |
1428 | if (!flow) |
1429 | break; | |
1430 | ||
0e9796b4 | 1431 | if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb, |
15e47304 | 1432 | NETLINK_CB(cb->skb).portid, |
ccb1352e | 1433 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1434 | OVS_FLOW_CMD_GET, ufid_flags) < 0) |
ccb1352e JG |
1435 | break; |
1436 | ||
1437 | cb->args[0] = bucket; | |
1438 | cb->args[1] = obj; | |
1439 | } | |
d57170b1 | 1440 | rcu_read_unlock(); |
ccb1352e JG |
1441 | return skb->len; |
1442 | } | |
1443 | ||
0c200ef9 PS |
1444 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
1445 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
05da5898 | 1446 | [OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED }, |
0c200ef9 PS |
1447 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
1448 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
05da5898 | 1449 | [OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG }, |
74ed7ab9 JS |
1450 | [OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 }, |
1451 | [OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 }, | |
0c200ef9 PS |
1452 | }; |
1453 | ||
48e48a70 | 1454 | static const struct genl_ops dp_flow_genl_ops[] = { |
ccb1352e | 1455 | { .cmd = OVS_FLOW_CMD_NEW, |
ef6243ac | 1456 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1457 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1458 | .doit = ovs_flow_cmd_new |
ccb1352e JG |
1459 | }, |
1460 | { .cmd = OVS_FLOW_CMD_DEL, | |
ef6243ac | 1461 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1462 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1463 | .doit = ovs_flow_cmd_del |
1464 | }, | |
1465 | { .cmd = OVS_FLOW_CMD_GET, | |
ef6243ac | 1466 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1467 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1468 | .doit = ovs_flow_cmd_get, |
1469 | .dumpit = ovs_flow_cmd_dump | |
1470 | }, | |
1471 | { .cmd = OVS_FLOW_CMD_SET, | |
ef6243ac | 1472 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1473 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
37bdc87b | 1474 | .doit = ovs_flow_cmd_set, |
ccb1352e JG |
1475 | }, |
1476 | }; | |
1477 | ||
56989f6d | 1478 | static struct genl_family dp_flow_genl_family __ro_after_init = { |
ccb1352e | 1479 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1480 | .name = OVS_FLOW_FAMILY, |
1481 | .version = OVS_FLOW_VERSION, | |
1482 | .maxattr = OVS_FLOW_ATTR_MAX, | |
3b0f31f2 | 1483 | .policy = flow_policy, |
3a4e0d6a PS |
1484 | .netnsok = true, |
1485 | .parallel_ops = true, | |
0c200ef9 PS |
1486 | .ops = dp_flow_genl_ops, |
1487 | .n_ops = ARRAY_SIZE(dp_flow_genl_ops), | |
1488 | .mcgrps = &ovs_dp_flow_multicast_group, | |
1489 | .n_mcgrps = 1, | |
489111e5 | 1490 | .module = THIS_MODULE, |
ccb1352e JG |
1491 | }; |
1492 | ||
c3ff8cfe TG |
1493 | static size_t ovs_dp_cmd_msg_size(void) |
1494 | { | |
1495 | size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header)); | |
1496 | ||
1497 | msgsize += nla_total_size(IFNAMSIZ); | |
66c7a5ee ND |
1498 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats)); |
1499 | msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats)); | |
45fb9c35 | 1500 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */ |
9bf24f59 | 1501 | msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_MASKS_CACHE_SIZE */ |
c3ff8cfe TG |
1502 | |
1503 | return msgsize; | |
1504 | } | |
1505 | ||
8ec609d8 | 1506 | /* Called with ovs_mutex. */ |
ccb1352e | 1507 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
15e47304 | 1508 | u32 portid, u32 seq, u32 flags, u8 cmd) |
ccb1352e JG |
1509 | { |
1510 | struct ovs_header *ovs_header; | |
1511 | struct ovs_dp_stats dp_stats; | |
1bd7116f | 1512 | struct ovs_dp_megaflow_stats dp_megaflow_stats; |
ccb1352e JG |
1513 | int err; |
1514 | ||
15e47304 | 1515 | ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family, |
ccb1352e JG |
1516 | flags, cmd); |
1517 | if (!ovs_header) | |
1518 | goto error; | |
1519 | ||
1520 | ovs_header->dp_ifindex = get_dpifindex(dp); | |
1521 | ||
ccb1352e | 1522 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp)); |
ccb1352e JG |
1523 | if (err) |
1524 | goto nla_put_failure; | |
1525 | ||
1bd7116f | 1526 | get_dp_stats(dp, &dp_stats, &dp_megaflow_stats); |
66c7a5ee ND |
1527 | if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), |
1528 | &dp_stats, OVS_DP_ATTR_PAD)) | |
1bd7116f AZ |
1529 | goto nla_put_failure; |
1530 | ||
66c7a5ee ND |
1531 | if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS, |
1532 | sizeof(struct ovs_dp_megaflow_stats), | |
1533 | &dp_megaflow_stats, OVS_DP_ATTR_PAD)) | |
028d6a67 | 1534 | goto nla_put_failure; |
ccb1352e | 1535 | |
43d4be9c TG |
1536 | if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features)) |
1537 | goto nla_put_failure; | |
1538 | ||
9bf24f59 EC |
1539 | if (nla_put_u32(skb, OVS_DP_ATTR_MASKS_CACHE_SIZE, |
1540 | ovs_flow_tbl_masks_cache_size(&dp->table))) | |
1541 | goto nla_put_failure; | |
1542 | ||
053c095a JB |
1543 | genlmsg_end(skb, ovs_header); |
1544 | return 0; | |
ccb1352e JG |
1545 | |
1546 | nla_put_failure: | |
1547 | genlmsg_cancel(skb, ovs_header); | |
1548 | error: | |
1549 | return -EMSGSIZE; | |
1550 | } | |
1551 | ||
263ea090 | 1552 | static struct sk_buff *ovs_dp_cmd_alloc_info(void) |
ccb1352e | 1553 | { |
551ddc05 | 1554 | return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL); |
ccb1352e JG |
1555 | } |
1556 | ||
bb6f9a70 | 1557 | /* Called with rcu_read_lock or ovs_mutex. */ |
46df7b81 | 1558 | static struct datapath *lookup_datapath(struct net *net, |
12eb18f7 | 1559 | const struct ovs_header *ovs_header, |
ccb1352e JG |
1560 | struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
1561 | { | |
1562 | struct datapath *dp; | |
1563 | ||
1564 | if (!a[OVS_DP_ATTR_NAME]) | |
46df7b81 | 1565 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
1566 | else { |
1567 | struct vport *vport; | |
1568 | ||
46df7b81 | 1569 | vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME])); |
ccb1352e | 1570 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; |
ccb1352e JG |
1571 | } |
1572 | return dp ? dp : ERR_PTR(-ENODEV); | |
1573 | } | |
1574 | ||
44da5ae5 TG |
1575 | static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info) |
1576 | { | |
1577 | struct datapath *dp; | |
1578 | ||
1579 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); | |
3c7eacfc | 1580 | if (IS_ERR(dp)) |
44da5ae5 TG |
1581 | return; |
1582 | ||
1583 | WARN(dp->user_features, "Dropping previously announced user features\n"); | |
1584 | dp->user_features = 0; | |
1585 | } | |
1586 | ||
95a7233c PB |
1587 | DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support); |
1588 | ||
1589 | static int ovs_dp_change(struct datapath *dp, struct nlattr *a[]) | |
43d4be9c | 1590 | { |
95a7233c PB |
1591 | u32 user_features = 0; |
1592 | ||
1593 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
1594 | user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
1595 | ||
1596 | if (user_features & ~(OVS_DP_F_VPORT_PIDS | | |
1597 | OVS_DP_F_UNALIGNED | | |
1598 | OVS_DP_F_TC_RECIRC_SHARING)) | |
1599 | return -EOPNOTSUPP; | |
1600 | ||
1601 | #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT) | |
1602 | if (user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1603 | return -EOPNOTSUPP; | |
1604 | #endif | |
1605 | } | |
1606 | ||
9bf24f59 EC |
1607 | if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) { |
1608 | int err; | |
1609 | u32 cache_size; | |
1610 | ||
1611 | cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]); | |
1612 | err = ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size); | |
1613 | if (err) | |
1614 | return err; | |
1615 | } | |
1616 | ||
95a7233c PB |
1617 | dp->user_features = user_features; |
1618 | ||
1619 | if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) | |
1620 | static_branch_enable(&tc_recirc_sharing_support); | |
1621 | else | |
1622 | static_branch_disable(&tc_recirc_sharing_support); | |
1623 | ||
1624 | return 0; | |
43d4be9c TG |
1625 | } |
1626 | ||
eec62ead TZ |
1627 | static int ovs_dp_stats_init(struct datapath *dp) |
1628 | { | |
1629 | dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu); | |
1630 | if (!dp->stats_percpu) | |
1631 | return -ENOMEM; | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static int ovs_dp_vport_init(struct datapath *dp) | |
1637 | { | |
1638 | int i; | |
1639 | ||
1640 | dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS, | |
1641 | sizeof(struct hlist_head), | |
1642 | GFP_KERNEL); | |
1643 | if (!dp->ports) | |
1644 | return -ENOMEM; | |
1645 | ||
1646 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) | |
1647 | INIT_HLIST_HEAD(&dp->ports[i]); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
ccb1352e JG |
1652 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
1653 | { | |
1654 | struct nlattr **a = info->attrs; | |
1655 | struct vport_parms parms; | |
1656 | struct sk_buff *reply; | |
1657 | struct datapath *dp; | |
1658 | struct vport *vport; | |
46df7b81 | 1659 | struct ovs_net *ovs_net; |
eec62ead | 1660 | int err; |
ccb1352e JG |
1661 | |
1662 | err = -EINVAL; | |
1663 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) | |
1664 | goto err; | |
1665 | ||
263ea090 | 1666 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1667 | if (!reply) |
1668 | return -ENOMEM; | |
ccb1352e JG |
1669 | |
1670 | err = -ENOMEM; | |
1671 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1672 | if (dp == NULL) | |
eec62ead | 1673 | goto err_destroy_reply; |
46df7b81 | 1674 | |
efd7ef1c | 1675 | ovs_dp_set_net(dp, sock_net(skb->sk)); |
ccb1352e JG |
1676 | |
1677 | /* Allocate table. */ | |
b637e498 PS |
1678 | err = ovs_flow_tbl_init(&dp->table); |
1679 | if (err) | |
eec62ead | 1680 | goto err_destroy_dp; |
ccb1352e | 1681 | |
eec62ead TZ |
1682 | err = ovs_dp_stats_init(dp); |
1683 | if (err) | |
ccb1352e | 1684 | goto err_destroy_table; |
ccb1352e | 1685 | |
eec62ead TZ |
1686 | err = ovs_dp_vport_init(dp); |
1687 | if (err) | |
1688 | goto err_destroy_stats; | |
15eac2a7 | 1689 | |
96fbc13d AZ |
1690 | err = ovs_meters_init(dp); |
1691 | if (err) | |
eec62ead | 1692 | goto err_destroy_ports; |
96fbc13d | 1693 | |
ccb1352e JG |
1694 | /* Set up our datapath device. */ |
1695 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); | |
1696 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
1697 | parms.options = NULL; | |
1698 | parms.dp = dp; | |
1699 | parms.port_no = OVSP_LOCAL; | |
5cd667b0 | 1700 | parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID]; |
ccb1352e | 1701 | |
95a7233c PB |
1702 | err = ovs_dp_change(dp, a); |
1703 | if (err) | |
1704 | goto err_destroy_meters; | |
43d4be9c | 1705 | |
6093ae9a JR |
1706 | /* So far only local changes have been made, now need the lock. */ |
1707 | ovs_lock(); | |
1708 | ||
ccb1352e JG |
1709 | vport = new_vport(&parms); |
1710 | if (IS_ERR(vport)) { | |
1711 | err = PTR_ERR(vport); | |
1712 | if (err == -EBUSY) | |
1713 | err = -EEXIST; | |
1714 | ||
44da5ae5 TG |
1715 | if (err == -EEXIST) { |
1716 | /* An outdated user space instance that does not understand | |
1717 | * the concept of user_features has attempted to create a new | |
1718 | * datapath and is likely to reuse it. Drop all user features. | |
1719 | */ | |
1720 | if (info->genlhdr->version < OVS_DP_VER_FEATURES) | |
1721 | ovs_dp_reset_user_features(skb, info); | |
1722 | } | |
1723 | ||
4c76bf69 | 1724 | ovs_unlock(); |
96fbc13d | 1725 | goto err_destroy_meters; |
ccb1352e JG |
1726 | } |
1727 | ||
6093ae9a JR |
1728 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1729 | info->snd_seq, 0, OVS_DP_CMD_NEW); | |
1730 | BUG_ON(err < 0); | |
ccb1352e | 1731 | |
46df7b81 | 1732 | ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id); |
59a35d60 | 1733 | list_add_tail_rcu(&dp->list_node, &ovs_net->dps); |
8e4e1713 PS |
1734 | |
1735 | ovs_unlock(); | |
ccb1352e | 1736 | |
2a94fe48 | 1737 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1738 | return 0; |
1739 | ||
96fbc13d | 1740 | err_destroy_meters: |
96fbc13d | 1741 | ovs_meters_exit(dp); |
eec62ead | 1742 | err_destroy_ports: |
15eac2a7 | 1743 | kfree(dp->ports); |
eec62ead | 1744 | err_destroy_stats: |
ccb1352e JG |
1745 | free_percpu(dp->stats_percpu); |
1746 | err_destroy_table: | |
9b996e54 | 1747 | ovs_flow_tbl_destroy(&dp->table); |
eec62ead | 1748 | err_destroy_dp: |
ccb1352e | 1749 | kfree(dp); |
eec62ead | 1750 | err_destroy_reply: |
6093ae9a | 1751 | kfree_skb(reply); |
ccb1352e JG |
1752 | err: |
1753 | return err; | |
1754 | } | |
1755 | ||
8e4e1713 | 1756 | /* Called with ovs_mutex. */ |
46df7b81 | 1757 | static void __dp_destroy(struct datapath *dp) |
ccb1352e | 1758 | { |
15eac2a7 | 1759 | int i; |
ccb1352e | 1760 | |
15eac2a7 PS |
1761 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { |
1762 | struct vport *vport; | |
b67bfe0d | 1763 | struct hlist_node *n; |
15eac2a7 | 1764 | |
b67bfe0d | 1765 | hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) |
15eac2a7 PS |
1766 | if (vport->port_no != OVSP_LOCAL) |
1767 | ovs_dp_detach_port(vport); | |
1768 | } | |
ccb1352e | 1769 | |
59a35d60 | 1770 | list_del_rcu(&dp->list_node); |
ccb1352e | 1771 | |
8e4e1713 | 1772 | /* OVSP_LOCAL is datapath internal port. We need to make sure that |
e80857cc | 1773 | * all ports in datapath are destroyed first before freeing datapath. |
ccb1352e | 1774 | */ |
8e4e1713 | 1775 | ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); |
ccb1352e | 1776 | |
e80857cc | 1777 | /* RCU destroy the flow table */ |
ccb1352e | 1778 | call_rcu(&dp->rcu, destroy_dp_rcu); |
46df7b81 PS |
1779 | } |
1780 | ||
1781 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
1782 | { | |
1783 | struct sk_buff *reply; | |
1784 | struct datapath *dp; | |
1785 | int err; | |
1786 | ||
263ea090 | 1787 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1788 | if (!reply) |
1789 | return -ENOMEM; | |
1790 | ||
8e4e1713 | 1791 | ovs_lock(); |
46df7b81 PS |
1792 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
1793 | err = PTR_ERR(dp); | |
1794 | if (IS_ERR(dp)) | |
6093ae9a | 1795 | goto err_unlock_free; |
46df7b81 | 1796 | |
6093ae9a JR |
1797 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
1798 | info->snd_seq, 0, OVS_DP_CMD_DEL); | |
1799 | BUG_ON(err < 0); | |
46df7b81 PS |
1800 | |
1801 | __dp_destroy(dp); | |
8e4e1713 | 1802 | ovs_unlock(); |
ccb1352e | 1803 | |
2a94fe48 | 1804 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1805 | |
1806 | return 0; | |
6093ae9a JR |
1807 | |
1808 | err_unlock_free: | |
8e4e1713 | 1809 | ovs_unlock(); |
6093ae9a | 1810 | kfree_skb(reply); |
8e4e1713 | 1811 | return err; |
ccb1352e JG |
1812 | } |
1813 | ||
1814 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
1815 | { | |
1816 | struct sk_buff *reply; | |
1817 | struct datapath *dp; | |
1818 | int err; | |
1819 | ||
263ea090 | 1820 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1821 | if (!reply) |
1822 | return -ENOMEM; | |
1823 | ||
8e4e1713 | 1824 | ovs_lock(); |
46df7b81 | 1825 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 | 1826 | err = PTR_ERR(dp); |
ccb1352e | 1827 | if (IS_ERR(dp)) |
6093ae9a | 1828 | goto err_unlock_free; |
ccb1352e | 1829 | |
95a7233c PB |
1830 | err = ovs_dp_change(dp, info->attrs); |
1831 | if (err) | |
1832 | goto err_unlock_free; | |
43d4be9c | 1833 | |
6093ae9a | 1834 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1835 | info->snd_seq, 0, OVS_DP_CMD_SET); |
6093ae9a | 1836 | BUG_ON(err < 0); |
ccb1352e | 1837 | |
8e4e1713 | 1838 | ovs_unlock(); |
2a94fe48 | 1839 | ovs_notify(&dp_datapath_genl_family, reply, info); |
ccb1352e JG |
1840 | |
1841 | return 0; | |
6093ae9a JR |
1842 | |
1843 | err_unlock_free: | |
8e4e1713 | 1844 | ovs_unlock(); |
6093ae9a | 1845 | kfree_skb(reply); |
8e4e1713 | 1846 | return err; |
ccb1352e JG |
1847 | } |
1848 | ||
1849 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
1850 | { | |
1851 | struct sk_buff *reply; | |
1852 | struct datapath *dp; | |
8e4e1713 | 1853 | int err; |
ccb1352e | 1854 | |
263ea090 | 1855 | reply = ovs_dp_cmd_alloc_info(); |
6093ae9a JR |
1856 | if (!reply) |
1857 | return -ENOMEM; | |
1858 | ||
8ec609d8 | 1859 | ovs_lock(); |
46df7b81 | 1860 | dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs); |
8e4e1713 PS |
1861 | if (IS_ERR(dp)) { |
1862 | err = PTR_ERR(dp); | |
6093ae9a | 1863 | goto err_unlock_free; |
8e4e1713 | 1864 | } |
6093ae9a | 1865 | err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, |
804fe108 | 1866 | info->snd_seq, 0, OVS_DP_CMD_GET); |
6093ae9a | 1867 | BUG_ON(err < 0); |
8ec609d8 | 1868 | ovs_unlock(); |
ccb1352e JG |
1869 | |
1870 | return genlmsg_reply(reply, info); | |
8e4e1713 | 1871 | |
6093ae9a | 1872 | err_unlock_free: |
8ec609d8 | 1873 | ovs_unlock(); |
6093ae9a | 1874 | kfree_skb(reply); |
8e4e1713 | 1875 | return err; |
ccb1352e JG |
1876 | } |
1877 | ||
1878 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
1879 | { | |
46df7b81 | 1880 | struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id); |
ccb1352e JG |
1881 | struct datapath *dp; |
1882 | int skip = cb->args[0]; | |
1883 | int i = 0; | |
1884 | ||
8ec609d8 PS |
1885 | ovs_lock(); |
1886 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
77676fdb | 1887 | if (i >= skip && |
15e47304 | 1888 | ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid, |
ccb1352e | 1889 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
804fe108 | 1890 | OVS_DP_CMD_GET) < 0) |
ccb1352e JG |
1891 | break; |
1892 | i++; | |
1893 | } | |
8ec609d8 | 1894 | ovs_unlock(); |
ccb1352e JG |
1895 | |
1896 | cb->args[0] = i; | |
1897 | ||
1898 | return skb->len; | |
1899 | } | |
1900 | ||
0c200ef9 PS |
1901 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
1902 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
1903 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, | |
1904 | [OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 }, | |
9bf24f59 EC |
1905 | [OVS_DP_ATTR_MASKS_CACHE_SIZE] = NLA_POLICY_RANGE(NLA_U32, 0, |
1906 | PCPU_MIN_UNIT_SIZE / sizeof(struct mask_cache_entry)), | |
0c200ef9 PS |
1907 | }; |
1908 | ||
48e48a70 | 1909 | static const struct genl_ops dp_datapath_genl_ops[] = { |
ccb1352e | 1910 | { .cmd = OVS_DP_CMD_NEW, |
ef6243ac | 1911 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1912 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1913 | .doit = ovs_dp_cmd_new |
1914 | }, | |
1915 | { .cmd = OVS_DP_CMD_DEL, | |
ef6243ac | 1916 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1917 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1918 | .doit = ovs_dp_cmd_del |
1919 | }, | |
1920 | { .cmd = OVS_DP_CMD_GET, | |
ef6243ac | 1921 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 1922 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
1923 | .doit = ovs_dp_cmd_get, |
1924 | .dumpit = ovs_dp_cmd_dump | |
1925 | }, | |
1926 | { .cmd = OVS_DP_CMD_SET, | |
ef6243ac | 1927 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 1928 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
1929 | .doit = ovs_dp_cmd_set, |
1930 | }, | |
1931 | }; | |
1932 | ||
56989f6d | 1933 | static struct genl_family dp_datapath_genl_family __ro_after_init = { |
ccb1352e | 1934 | .hdrsize = sizeof(struct ovs_header), |
0c200ef9 PS |
1935 | .name = OVS_DATAPATH_FAMILY, |
1936 | .version = OVS_DATAPATH_VERSION, | |
1937 | .maxattr = OVS_DP_ATTR_MAX, | |
3b0f31f2 | 1938 | .policy = datapath_policy, |
3a4e0d6a PS |
1939 | .netnsok = true, |
1940 | .parallel_ops = true, | |
0c200ef9 PS |
1941 | .ops = dp_datapath_genl_ops, |
1942 | .n_ops = ARRAY_SIZE(dp_datapath_genl_ops), | |
1943 | .mcgrps = &ovs_dp_datapath_multicast_group, | |
1944 | .n_mcgrps = 1, | |
489111e5 | 1945 | .module = THIS_MODULE, |
ccb1352e JG |
1946 | }; |
1947 | ||
8e4e1713 | 1948 | /* Called with ovs_mutex or RCU read lock. */ |
ccb1352e | 1949 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
9354d452 | 1950 | struct net *net, u32 portid, u32 seq, |
d4e4fdf9 | 1951 | u32 flags, u8 cmd, gfp_t gfp) |
ccb1352e JG |
1952 | { |
1953 | struct ovs_header *ovs_header; | |
1954 | struct ovs_vport_stats vport_stats; | |
1955 | int err; | |
1956 | ||
15e47304 | 1957 | ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, |
ccb1352e JG |
1958 | flags, cmd); |
1959 | if (!ovs_header) | |
1960 | return -EMSGSIZE; | |
1961 | ||
1962 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); | |
1963 | ||
028d6a67 DM |
1964 | if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) || |
1965 | nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) || | |
5cd667b0 | 1966 | nla_put_string(skb, OVS_VPORT_ATTR_NAME, |
9354d452 JB |
1967 | ovs_vport_name(vport)) || |
1968 | nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex)) | |
028d6a67 | 1969 | goto nla_put_failure; |
ccb1352e | 1970 | |
9354d452 | 1971 | if (!net_eq(net, dev_net(vport->dev))) { |
d4e4fdf9 | 1972 | int id = peernet2id_alloc(net, dev_net(vport->dev), gfp); |
9354d452 JB |
1973 | |
1974 | if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id)) | |
1975 | goto nla_put_failure; | |
1976 | } | |
1977 | ||
ccb1352e | 1978 | ovs_vport_get_stats(vport, &vport_stats); |
66c7a5ee ND |
1979 | if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS, |
1980 | sizeof(struct ovs_vport_stats), &vport_stats, | |
1981 | OVS_VPORT_ATTR_PAD)) | |
028d6a67 | 1982 | goto nla_put_failure; |
ccb1352e | 1983 | |
5cd667b0 AW |
1984 | if (ovs_vport_get_upcall_portids(vport, skb)) |
1985 | goto nla_put_failure; | |
1986 | ||
ccb1352e JG |
1987 | err = ovs_vport_get_options(vport, skb); |
1988 | if (err == -EMSGSIZE) | |
1989 | goto error; | |
1990 | ||
053c095a JB |
1991 | genlmsg_end(skb, ovs_header); |
1992 | return 0; | |
ccb1352e JG |
1993 | |
1994 | nla_put_failure: | |
1995 | err = -EMSGSIZE; | |
1996 | error: | |
1997 | genlmsg_cancel(skb, ovs_header); | |
1998 | return err; | |
1999 | } | |
2000 | ||
6093ae9a JR |
2001 | static struct sk_buff *ovs_vport_cmd_alloc_info(void) |
2002 | { | |
2003 | return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
2004 | } | |
2005 | ||
2006 | /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */ | |
9354d452 JB |
2007 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, |
2008 | u32 portid, u32 seq, u8 cmd) | |
ccb1352e JG |
2009 | { |
2010 | struct sk_buff *skb; | |
2011 | int retval; | |
2012 | ||
d4e4fdf9 | 2013 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
ccb1352e JG |
2014 | if (!skb) |
2015 | return ERR_PTR(-ENOMEM); | |
2016 | ||
d4e4fdf9 GN |
2017 | retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd, |
2018 | GFP_KERNEL); | |
a9341512 JG |
2019 | BUG_ON(retval < 0); |
2020 | ||
ccb1352e JG |
2021 | return skb; |
2022 | } | |
2023 | ||
8e4e1713 | 2024 | /* Called with ovs_mutex or RCU read lock. */ |
46df7b81 | 2025 | static struct vport *lookup_vport(struct net *net, |
12eb18f7 | 2026 | const struct ovs_header *ovs_header, |
ccb1352e JG |
2027 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
2028 | { | |
2029 | struct datapath *dp; | |
2030 | struct vport *vport; | |
2031 | ||
9354d452 JB |
2032 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2033 | return ERR_PTR(-EOPNOTSUPP); | |
ccb1352e | 2034 | if (a[OVS_VPORT_ATTR_NAME]) { |
46df7b81 | 2035 | vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME])); |
ccb1352e JG |
2036 | if (!vport) |
2037 | return ERR_PTR(-ENODEV); | |
651a68ea BP |
2038 | if (ovs_header->dp_ifindex && |
2039 | ovs_header->dp_ifindex != get_dpifindex(vport->dp)) | |
2040 | return ERR_PTR(-ENODEV); | |
ccb1352e JG |
2041 | return vport; |
2042 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { | |
2043 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
2044 | ||
2045 | if (port_no >= DP_MAX_PORTS) | |
2046 | return ERR_PTR(-EFBIG); | |
2047 | ||
46df7b81 | 2048 | dp = get_dp(net, ovs_header->dp_ifindex); |
ccb1352e JG |
2049 | if (!dp) |
2050 | return ERR_PTR(-ENODEV); | |
2051 | ||
8e4e1713 | 2052 | vport = ovs_vport_ovsl_rcu(dp, port_no); |
ccb1352e | 2053 | if (!vport) |
14408dba | 2054 | return ERR_PTR(-ENODEV); |
ccb1352e JG |
2055 | return vport; |
2056 | } else | |
2057 | return ERR_PTR(-EINVAL); | |
9354d452 | 2058 | |
ccb1352e JG |
2059 | } |
2060 | ||
6b660c41 | 2061 | static unsigned int ovs_get_max_headroom(struct datapath *dp) |
3a927bc7 | 2062 | { |
6b660c41 | 2063 | unsigned int dev_headroom, max_headroom = 0; |
3a927bc7 PA |
2064 | struct net_device *dev; |
2065 | struct vport *vport; | |
2066 | int i; | |
2067 | ||
2068 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
53742e69 MB |
2069 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
2070 | lockdep_ovsl_is_held()) { | |
3a927bc7 PA |
2071 | dev = vport->dev; |
2072 | dev_headroom = netdev_get_fwd_headroom(dev); | |
2073 | if (dev_headroom > max_headroom) | |
2074 | max_headroom = dev_headroom; | |
2075 | } | |
2076 | } | |
2077 | ||
6b660c41 TY |
2078 | return max_headroom; |
2079 | } | |
2080 | ||
2081 | /* Called with ovs_mutex */ | |
2082 | static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom) | |
2083 | { | |
2084 | struct vport *vport; | |
2085 | int i; | |
2086 | ||
2087 | dp->max_headroom = new_headroom; | |
3a927bc7 | 2088 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) |
53742e69 MB |
2089 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node, |
2090 | lockdep_ovsl_is_held()) | |
6b660c41 | 2091 | netdev_set_rx_headroom(vport->dev, new_headroom); |
3a927bc7 PA |
2092 | } |
2093 | ||
ccb1352e JG |
2094 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
2095 | { | |
2096 | struct nlattr **a = info->attrs; | |
2097 | struct ovs_header *ovs_header = info->userhdr; | |
2098 | struct vport_parms parms; | |
2099 | struct sk_buff *reply; | |
2100 | struct vport *vport; | |
2101 | struct datapath *dp; | |
6b660c41 | 2102 | unsigned int new_headroom; |
ccb1352e JG |
2103 | u32 port_no; |
2104 | int err; | |
2105 | ||
ccb1352e JG |
2106 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
2107 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
6093ae9a | 2108 | return -EINVAL; |
9354d452 JB |
2109 | if (a[OVS_VPORT_ATTR_IFINDEX]) |
2110 | return -EOPNOTSUPP; | |
6093ae9a JR |
2111 | |
2112 | port_no = a[OVS_VPORT_ATTR_PORT_NO] | |
2113 | ? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0; | |
2114 | if (port_no >= DP_MAX_PORTS) | |
2115 | return -EFBIG; | |
2116 | ||
2117 | reply = ovs_vport_cmd_alloc_info(); | |
2118 | if (!reply) | |
2119 | return -ENOMEM; | |
ccb1352e | 2120 | |
8e4e1713 | 2121 | ovs_lock(); |
62b9c8d0 | 2122 | restart: |
46df7b81 | 2123 | dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); |
ccb1352e JG |
2124 | err = -ENODEV; |
2125 | if (!dp) | |
6093ae9a | 2126 | goto exit_unlock_free; |
ccb1352e | 2127 | |
6093ae9a | 2128 | if (port_no) { |
8e4e1713 | 2129 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2130 | err = -EBUSY; |
2131 | if (vport) | |
6093ae9a | 2132 | goto exit_unlock_free; |
ccb1352e JG |
2133 | } else { |
2134 | for (port_no = 1; ; port_no++) { | |
2135 | if (port_no >= DP_MAX_PORTS) { | |
2136 | err = -EFBIG; | |
6093ae9a | 2137 | goto exit_unlock_free; |
ccb1352e | 2138 | } |
8e4e1713 | 2139 | vport = ovs_vport_ovsl(dp, port_no); |
ccb1352e JG |
2140 | if (!vport) |
2141 | break; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); | |
2146 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
2147 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
2148 | parms.dp = dp; | |
2149 | parms.port_no = port_no; | |
5cd667b0 | 2150 | parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID]; |
ccb1352e JG |
2151 | |
2152 | vport = new_vport(&parms); | |
2153 | err = PTR_ERR(vport); | |
62b9c8d0 TG |
2154 | if (IS_ERR(vport)) { |
2155 | if (err == -EAGAIN) | |
2156 | goto restart; | |
6093ae9a | 2157 | goto exit_unlock_free; |
62b9c8d0 | 2158 | } |
ccb1352e | 2159 | |
9354d452 JB |
2160 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2161 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2162 | OVS_VPORT_CMD_NEW, GFP_KERNEL); |
3a927bc7 | 2163 | |
6b660c41 TY |
2164 | new_headroom = netdev_get_fwd_headroom(vport->dev); |
2165 | ||
2166 | if (new_headroom > dp->max_headroom) | |
2167 | ovs_update_headroom(dp, new_headroom); | |
3a927bc7 PA |
2168 | else |
2169 | netdev_set_rx_headroom(vport->dev, dp->max_headroom); | |
2170 | ||
6093ae9a JR |
2171 | BUG_ON(err < 0); |
2172 | ovs_unlock(); | |
ed661185 | 2173 | |
2a94fe48 | 2174 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2175 | return 0; |
ccb1352e | 2176 | |
6093ae9a | 2177 | exit_unlock_free: |
8e4e1713 | 2178 | ovs_unlock(); |
6093ae9a | 2179 | kfree_skb(reply); |
ccb1352e JG |
2180 | return err; |
2181 | } | |
2182 | ||
2183 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) | |
2184 | { | |
2185 | struct nlattr **a = info->attrs; | |
2186 | struct sk_buff *reply; | |
2187 | struct vport *vport; | |
2188 | int err; | |
2189 | ||
6093ae9a JR |
2190 | reply = ovs_vport_cmd_alloc_info(); |
2191 | if (!reply) | |
2192 | return -ENOMEM; | |
2193 | ||
8e4e1713 | 2194 | ovs_lock(); |
46df7b81 | 2195 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2196 | err = PTR_ERR(vport); |
2197 | if (IS_ERR(vport)) | |
6093ae9a | 2198 | goto exit_unlock_free; |
ccb1352e | 2199 | |
ccb1352e | 2200 | if (a[OVS_VPORT_ATTR_TYPE] && |
f44f3408 | 2201 | nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { |
ccb1352e | 2202 | err = -EINVAL; |
6093ae9a | 2203 | goto exit_unlock_free; |
a9341512 JG |
2204 | } |
2205 | ||
f44f3408 | 2206 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
ccb1352e | 2207 | err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
f44f3408 | 2208 | if (err) |
6093ae9a | 2209 | goto exit_unlock_free; |
f44f3408 | 2210 | } |
a9341512 | 2211 | |
5cd667b0 AW |
2212 | |
2213 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
2214 | struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID]; | |
2215 | ||
2216 | err = ovs_vport_set_upcall_portids(vport, ids); | |
2217 | if (err) | |
2218 | goto exit_unlock_free; | |
2219 | } | |
ccb1352e | 2220 | |
9354d452 JB |
2221 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2222 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2223 | OVS_VPORT_CMD_SET, GFP_KERNEL); |
a9341512 | 2224 | BUG_ON(err < 0); |
ccb1352e | 2225 | |
8e4e1713 | 2226 | ovs_unlock(); |
2a94fe48 | 2227 | ovs_notify(&dp_vport_genl_family, reply, info); |
8e4e1713 | 2228 | return 0; |
ccb1352e | 2229 | |
6093ae9a | 2230 | exit_unlock_free: |
8e4e1713 | 2231 | ovs_unlock(); |
6093ae9a | 2232 | kfree_skb(reply); |
ccb1352e JG |
2233 | return err; |
2234 | } | |
2235 | ||
2236 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) | |
2237 | { | |
6b660c41 | 2238 | bool update_headroom = false; |
ccb1352e JG |
2239 | struct nlattr **a = info->attrs; |
2240 | struct sk_buff *reply; | |
3a927bc7 | 2241 | struct datapath *dp; |
ccb1352e | 2242 | struct vport *vport; |
6b660c41 | 2243 | unsigned int new_headroom; |
ccb1352e JG |
2244 | int err; |
2245 | ||
6093ae9a JR |
2246 | reply = ovs_vport_cmd_alloc_info(); |
2247 | if (!reply) | |
2248 | return -ENOMEM; | |
2249 | ||
8e4e1713 | 2250 | ovs_lock(); |
46df7b81 | 2251 | vport = lookup_vport(sock_net(skb->sk), info->userhdr, a); |
ccb1352e JG |
2252 | err = PTR_ERR(vport); |
2253 | if (IS_ERR(vport)) | |
6093ae9a | 2254 | goto exit_unlock_free; |
ccb1352e JG |
2255 | |
2256 | if (vport->port_no == OVSP_LOCAL) { | |
2257 | err = -EINVAL; | |
6093ae9a | 2258 | goto exit_unlock_free; |
ccb1352e JG |
2259 | } |
2260 | ||
9354d452 JB |
2261 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2262 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2263 | OVS_VPORT_CMD_DEL, GFP_KERNEL); |
6093ae9a | 2264 | BUG_ON(err < 0); |
3a927bc7 PA |
2265 | |
2266 | /* the vport deletion may trigger dp headroom update */ | |
2267 | dp = vport->dp; | |
2268 | if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom) | |
6b660c41 TY |
2269 | update_headroom = true; |
2270 | ||
3a927bc7 | 2271 | netdev_reset_rx_headroom(vport->dev); |
ccb1352e | 2272 | ovs_dp_detach_port(vport); |
3a927bc7 | 2273 | |
6b660c41 TY |
2274 | if (update_headroom) { |
2275 | new_headroom = ovs_get_max_headroom(dp); | |
2276 | ||
2277 | if (new_headroom < dp->max_headroom) | |
2278 | ovs_update_headroom(dp, new_headroom); | |
2279 | } | |
6093ae9a | 2280 | ovs_unlock(); |
ccb1352e | 2281 | |
2a94fe48 | 2282 | ovs_notify(&dp_vport_genl_family, reply, info); |
6093ae9a | 2283 | return 0; |
ccb1352e | 2284 | |
6093ae9a | 2285 | exit_unlock_free: |
8e4e1713 | 2286 | ovs_unlock(); |
6093ae9a | 2287 | kfree_skb(reply); |
ccb1352e JG |
2288 | return err; |
2289 | } | |
2290 | ||
2291 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) | |
2292 | { | |
2293 | struct nlattr **a = info->attrs; | |
2294 | struct ovs_header *ovs_header = info->userhdr; | |
2295 | struct sk_buff *reply; | |
2296 | struct vport *vport; | |
2297 | int err; | |
2298 | ||
6093ae9a JR |
2299 | reply = ovs_vport_cmd_alloc_info(); |
2300 | if (!reply) | |
2301 | return -ENOMEM; | |
2302 | ||
ccb1352e | 2303 | rcu_read_lock(); |
46df7b81 | 2304 | vport = lookup_vport(sock_net(skb->sk), ovs_header, a); |
ccb1352e JG |
2305 | err = PTR_ERR(vport); |
2306 | if (IS_ERR(vport)) | |
6093ae9a | 2307 | goto exit_unlock_free; |
9354d452 JB |
2308 | err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info), |
2309 | info->snd_portid, info->snd_seq, 0, | |
d4e4fdf9 | 2310 | OVS_VPORT_CMD_GET, GFP_ATOMIC); |
6093ae9a | 2311 | BUG_ON(err < 0); |
ccb1352e JG |
2312 | rcu_read_unlock(); |
2313 | ||
2314 | return genlmsg_reply(reply, info); | |
2315 | ||
6093ae9a | 2316 | exit_unlock_free: |
ccb1352e | 2317 | rcu_read_unlock(); |
6093ae9a | 2318 | kfree_skb(reply); |
ccb1352e JG |
2319 | return err; |
2320 | } | |
2321 | ||
2322 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2323 | { | |
2324 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); | |
2325 | struct datapath *dp; | |
15eac2a7 PS |
2326 | int bucket = cb->args[0], skip = cb->args[1]; |
2327 | int i, j = 0; | |
ccb1352e | 2328 | |
42ee19e2 | 2329 | rcu_read_lock(); |
cc3a5ae6 | 2330 | dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex); |
42ee19e2 JR |
2331 | if (!dp) { |
2332 | rcu_read_unlock(); | |
ccb1352e | 2333 | return -ENODEV; |
42ee19e2 | 2334 | } |
15eac2a7 | 2335 | for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { |
ccb1352e | 2336 | struct vport *vport; |
15eac2a7 PS |
2337 | |
2338 | j = 0; | |
b67bfe0d | 2339 | hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) { |
15eac2a7 PS |
2340 | if (j >= skip && |
2341 | ovs_vport_cmd_fill_info(vport, skb, | |
9354d452 | 2342 | sock_net(skb->sk), |
15e47304 | 2343 | NETLINK_CB(cb->skb).portid, |
15eac2a7 PS |
2344 | cb->nlh->nlmsg_seq, |
2345 | NLM_F_MULTI, | |
d4e4fdf9 GN |
2346 | OVS_VPORT_CMD_GET, |
2347 | GFP_ATOMIC) < 0) | |
15eac2a7 PS |
2348 | goto out; |
2349 | ||
2350 | j++; | |
2351 | } | |
2352 | skip = 0; | |
ccb1352e | 2353 | } |
15eac2a7 | 2354 | out: |
ccb1352e JG |
2355 | rcu_read_unlock(); |
2356 | ||
15eac2a7 PS |
2357 | cb->args[0] = i; |
2358 | cb->args[1] = j; | |
ccb1352e | 2359 | |
15eac2a7 | 2360 | return skb->len; |
ccb1352e JG |
2361 | } |
2362 | ||
eac87c41 EC |
2363 | static void ovs_dp_masks_rebalance(struct work_struct *work) |
2364 | { | |
a65878d6 EC |
2365 | struct ovs_net *ovs_net = container_of(work, struct ovs_net, |
2366 | masks_rebalance.work); | |
2367 | struct datapath *dp; | |
eac87c41 EC |
2368 | |
2369 | ovs_lock(); | |
a65878d6 EC |
2370 | |
2371 | list_for_each_entry(dp, &ovs_net->dps, list_node) | |
2372 | ovs_flow_masks_rebalance(&dp->table); | |
2373 | ||
eac87c41 EC |
2374 | ovs_unlock(); |
2375 | ||
a65878d6 | 2376 | schedule_delayed_work(&ovs_net->masks_rebalance, |
eac87c41 EC |
2377 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); |
2378 | } | |
2379 | ||
0c200ef9 PS |
2380 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
2381 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, | |
2382 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, | |
2383 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, | |
2384 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
ea8564c8 | 2385 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC }, |
0c200ef9 | 2386 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
9354d452 JB |
2387 | [OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 }, |
2388 | [OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 }, | |
0c200ef9 PS |
2389 | }; |
2390 | ||
48e48a70 | 2391 | static const struct genl_ops dp_vport_genl_ops[] = { |
ccb1352e | 2392 | { .cmd = OVS_VPORT_CMD_NEW, |
ef6243ac | 2393 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2394 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2395 | .doit = ovs_vport_cmd_new |
2396 | }, | |
2397 | { .cmd = OVS_VPORT_CMD_DEL, | |
ef6243ac | 2398 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2399 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2400 | .doit = ovs_vport_cmd_del |
2401 | }, | |
2402 | { .cmd = OVS_VPORT_CMD_GET, | |
ef6243ac | 2403 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
ccb1352e | 2404 | .flags = 0, /* OK for unprivileged users. */ |
ccb1352e JG |
2405 | .doit = ovs_vport_cmd_get, |
2406 | .dumpit = ovs_vport_cmd_dump | |
2407 | }, | |
2408 | { .cmd = OVS_VPORT_CMD_SET, | |
ef6243ac | 2409 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
4a92602a | 2410 | .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
ccb1352e JG |
2411 | .doit = ovs_vport_cmd_set, |
2412 | }, | |
2413 | }; | |
2414 | ||
56989f6d | 2415 | struct genl_family dp_vport_genl_family __ro_after_init = { |
0c200ef9 PS |
2416 | .hdrsize = sizeof(struct ovs_header), |
2417 | .name = OVS_VPORT_FAMILY, | |
2418 | .version = OVS_VPORT_VERSION, | |
2419 | .maxattr = OVS_VPORT_ATTR_MAX, | |
3b0f31f2 | 2420 | .policy = vport_policy, |
0c200ef9 PS |
2421 | .netnsok = true, |
2422 | .parallel_ops = true, | |
2423 | .ops = dp_vport_genl_ops, | |
2424 | .n_ops = ARRAY_SIZE(dp_vport_genl_ops), | |
2425 | .mcgrps = &ovs_dp_vport_multicast_group, | |
2426 | .n_mcgrps = 1, | |
489111e5 | 2427 | .module = THIS_MODULE, |
ccb1352e JG |
2428 | }; |
2429 | ||
0c200ef9 PS |
2430 | static struct genl_family * const dp_genl_families[] = { |
2431 | &dp_datapath_genl_family, | |
2432 | &dp_vport_genl_family, | |
2433 | &dp_flow_genl_family, | |
2434 | &dp_packet_genl_family, | |
96fbc13d | 2435 | &dp_meter_genl_family, |
11efd5cb YHW |
2436 | #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) |
2437 | &dp_ct_limit_genl_family, | |
2438 | #endif | |
ccb1352e JG |
2439 | }; |
2440 | ||
2441 | static void dp_unregister_genl(int n_families) | |
2442 | { | |
2443 | int i; | |
2444 | ||
2445 | for (i = 0; i < n_families; i++) | |
0c200ef9 | 2446 | genl_unregister_family(dp_genl_families[i]); |
ccb1352e JG |
2447 | } |
2448 | ||
56989f6d | 2449 | static int __init dp_register_genl(void) |
ccb1352e | 2450 | { |
ccb1352e JG |
2451 | int err; |
2452 | int i; | |
2453 | ||
ccb1352e | 2454 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { |
ccb1352e | 2455 | |
0c200ef9 | 2456 | err = genl_register_family(dp_genl_families[i]); |
ccb1352e JG |
2457 | if (err) |
2458 | goto error; | |
ccb1352e JG |
2459 | } |
2460 | ||
2461 | return 0; | |
2462 | ||
2463 | error: | |
0c200ef9 | 2464 | dp_unregister_genl(i); |
ccb1352e JG |
2465 | return err; |
2466 | } | |
2467 | ||
46df7b81 PS |
2468 | static int __net_init ovs_init_net(struct net *net) |
2469 | { | |
2470 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); | |
2471 | ||
2472 | INIT_LIST_HEAD(&ovs_net->dps); | |
8e4e1713 | 2473 | INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
a65878d6 EC |
2474 | INIT_DELAYED_WORK(&ovs_net->masks_rebalance, ovs_dp_masks_rebalance); |
2475 | schedule_delayed_work(&ovs_net->masks_rebalance, | |
2476 | msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); | |
11efd5cb | 2477 | return ovs_ct_init(net); |
46df7b81 PS |
2478 | } |
2479 | ||
7b4577a9 PS |
2480 | static void __net_exit list_vports_from_net(struct net *net, struct net *dnet, |
2481 | struct list_head *head) | |
46df7b81 | 2482 | { |
8e4e1713 | 2483 | struct ovs_net *ovs_net = net_generic(net, ovs_net_id); |
7b4577a9 PS |
2484 | struct datapath *dp; |
2485 | ||
2486 | list_for_each_entry(dp, &ovs_net->dps, list_node) { | |
2487 | int i; | |
2488 | ||
2489 | for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { | |
2490 | struct vport *vport; | |
2491 | ||
2492 | hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) { | |
7b4577a9 PS |
2493 | if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL) |
2494 | continue; | |
2495 | ||
be4ace6e | 2496 | if (dev_net(vport->dev) == dnet) |
7b4577a9 PS |
2497 | list_add(&vport->detach_list, head); |
2498 | } | |
2499 | } | |
2500 | } | |
2501 | } | |
2502 | ||
2503 | static void __net_exit ovs_exit_net(struct net *dnet) | |
2504 | { | |
2505 | struct datapath *dp, *dp_next; | |
2506 | struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id); | |
2507 | struct vport *vport, *vport_next; | |
2508 | struct net *net; | |
2509 | LIST_HEAD(head); | |
46df7b81 | 2510 | |
8e4e1713 | 2511 | ovs_lock(); |
27de77ce TZ |
2512 | |
2513 | ovs_ct_exit(dnet); | |
2514 | ||
46df7b81 PS |
2515 | list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node) |
2516 | __dp_destroy(dp); | |
7b4577a9 | 2517 | |
f0b07bb1 | 2518 | down_read(&net_rwsem); |
7b4577a9 PS |
2519 | for_each_net(net) |
2520 | list_vports_from_net(net, dnet, &head); | |
f0b07bb1 | 2521 | up_read(&net_rwsem); |
7b4577a9 PS |
2522 | |
2523 | /* Detach all vports from given namespace. */ | |
2524 | list_for_each_entry_safe(vport, vport_next, &head, detach_list) { | |
2525 | list_del(&vport->detach_list); | |
2526 | ovs_dp_detach_port(vport); | |
2527 | } | |
2528 | ||
8e4e1713 PS |
2529 | ovs_unlock(); |
2530 | ||
a65878d6 | 2531 | cancel_delayed_work_sync(&ovs_net->masks_rebalance); |
8e4e1713 | 2532 | cancel_work_sync(&ovs_net->dp_notify_work); |
46df7b81 PS |
2533 | } |
2534 | ||
2535 | static struct pernet_operations ovs_net_ops = { | |
2536 | .init = ovs_init_net, | |
2537 | .exit = ovs_exit_net, | |
2538 | .id = &ovs_net_id, | |
2539 | .size = sizeof(struct ovs_net), | |
2540 | }; | |
2541 | ||
ccb1352e JG |
2542 | static int __init dp_init(void) |
2543 | { | |
ccb1352e JG |
2544 | int err; |
2545 | ||
c593642c | 2546 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb)); |
ccb1352e JG |
2547 | |
2548 | pr_info("Open vSwitch switching datapath\n"); | |
2549 | ||
971427f3 | 2550 | err = action_fifos_init(); |
ccb1352e JG |
2551 | if (err) |
2552 | goto error; | |
2553 | ||
971427f3 AZ |
2554 | err = ovs_internal_dev_rtnl_link_register(); |
2555 | if (err) | |
2556 | goto error_action_fifos_exit; | |
2557 | ||
5b9e7e16 JP |
2558 | err = ovs_flow_init(); |
2559 | if (err) | |
2560 | goto error_unreg_rtnl_link; | |
2561 | ||
ccb1352e JG |
2562 | err = ovs_vport_init(); |
2563 | if (err) | |
2564 | goto error_flow_exit; | |
2565 | ||
46df7b81 | 2566 | err = register_pernet_device(&ovs_net_ops); |
ccb1352e JG |
2567 | if (err) |
2568 | goto error_vport_exit; | |
2569 | ||
46df7b81 PS |
2570 | err = register_netdevice_notifier(&ovs_dp_device_notifier); |
2571 | if (err) | |
2572 | goto error_netns_exit; | |
2573 | ||
62b9c8d0 TG |
2574 | err = ovs_netdev_init(); |
2575 | if (err) | |
2576 | goto error_unreg_notifier; | |
2577 | ||
ccb1352e JG |
2578 | err = dp_register_genl(); |
2579 | if (err < 0) | |
62b9c8d0 | 2580 | goto error_unreg_netdev; |
ccb1352e | 2581 | |
ccb1352e JG |
2582 | return 0; |
2583 | ||
62b9c8d0 TG |
2584 | error_unreg_netdev: |
2585 | ovs_netdev_exit(); | |
ccb1352e JG |
2586 | error_unreg_notifier: |
2587 | unregister_netdevice_notifier(&ovs_dp_device_notifier); | |
46df7b81 PS |
2588 | error_netns_exit: |
2589 | unregister_pernet_device(&ovs_net_ops); | |
ccb1352e JG |
2590 | error_vport_exit: |
2591 | ovs_vport_exit(); | |
2592 | error_flow_exit: | |
2593 | ovs_flow_exit(); | |
5b9e7e16 JP |
2594 | error_unreg_rtnl_link: |
2595 | ovs_internal_dev_rtnl_link_unregister(); | |
971427f3 AZ |
2596 | error_action_fifos_exit: |
2597 | action_fifos_exit(); | |
ccb1352e JG |
2598 | error: |
2599 | return err; | |
2600 | } | |
2601 | ||
2602 | static void dp_cleanup(void) | |
2603 | { | |
ccb1352e | 2604 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
62b9c8d0 | 2605 | ovs_netdev_exit(); |
ccb1352e | 2606 | unregister_netdevice_notifier(&ovs_dp_device_notifier); |
46df7b81 PS |
2607 | unregister_pernet_device(&ovs_net_ops); |
2608 | rcu_barrier(); | |
ccb1352e JG |
2609 | ovs_vport_exit(); |
2610 | ovs_flow_exit(); | |
5b9e7e16 | 2611 | ovs_internal_dev_rtnl_link_unregister(); |
971427f3 | 2612 | action_fifos_exit(); |
ccb1352e JG |
2613 | } |
2614 | ||
2615 | module_init(dp_init); | |
2616 | module_exit(dp_cleanup); | |
2617 | ||
2618 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2619 | MODULE_LICENSE("GPL"); | |
ed227099 TLSC |
2620 | MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); |
2621 | MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); | |
2622 | MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); | |
2623 | MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); | |
96fbc13d | 2624 | MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); |
11efd5cb | 2625 | MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY); |