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Commit | Line | Data |
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064af421 | 1 | /* |
f632c8fc | 2 | * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks. |
a14bc59f BP |
3 | * Distributed under the terms of the GNU GPL version 2. |
4 | * | |
5 | * Significant portions of this file may be copied from parts of the Linux | |
6 | * kernel, by Linus Torvalds and others. | |
064af421 BP |
7 | */ |
8 | ||
9 | /* Functions for managing the dp interface/device. */ | |
10 | ||
dfffaef1 JP |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | ||
064af421 BP |
13 | #include <linux/init.h> |
14 | #include <linux/module.h> | |
064af421 | 15 | #include <linux/if_arp.h> |
064af421 BP |
16 | #include <linux/if_vlan.h> |
17 | #include <linux/in.h> | |
18 | #include <linux/ip.h> | |
982b8810 | 19 | #include <linux/jhash.h> |
064af421 BP |
20 | #include <linux/delay.h> |
21 | #include <linux/time.h> | |
22 | #include <linux/etherdevice.h> | |
ed099e92 | 23 | #include <linux/genetlink.h> |
064af421 BP |
24 | #include <linux/kernel.h> |
25 | #include <linux/kthread.h> | |
064af421 BP |
26 | #include <linux/mutex.h> |
27 | #include <linux/percpu.h> | |
28 | #include <linux/rcupdate.h> | |
29 | #include <linux/tcp.h> | |
30 | #include <linux/udp.h> | |
31 | #include <linux/version.h> | |
32 | #include <linux/ethtool.h> | |
064af421 BP |
33 | #include <linux/wait.h> |
34 | #include <asm/system.h> | |
35 | #include <asm/div64.h> | |
36 | #include <asm/bug.h> | |
656a0e37 | 37 | #include <linux/highmem.h> |
064af421 BP |
38 | #include <linux/netfilter_bridge.h> |
39 | #include <linux/netfilter_ipv4.h> | |
40 | #include <linux/inetdevice.h> | |
41 | #include <linux/list.h> | |
42 | #include <linux/rculist.h> | |
064af421 | 43 | #include <linux/dmi.h> |
3c5f6de3 | 44 | #include <net/inet_ecn.h> |
36956a7d | 45 | #include <net/genetlink.h> |
064af421 BP |
46 | |
47 | #include "openvswitch/datapath-protocol.h" | |
dd8d6b8c | 48 | #include "checksum.h" |
064af421 BP |
49 | #include "datapath.h" |
50 | #include "actions.h" | |
064af421 | 51 | #include "flow.h" |
303708cc | 52 | #include "vlan.h" |
3544358a | 53 | #include "tunnel.h" |
f2459fe7 | 54 | #include "vport-internal_dev.h" |
064af421 | 55 | |
4cf41591 | 56 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \ |
3d4793d6 SH |
57 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0) |
58 | #error Kernels before 2.6.18 or after 3.0 are not supported by this version of Open vSwitch. | |
4cf41591 JG |
59 | #endif |
60 | ||
064af421 BP |
61 | int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); |
62 | EXPORT_SYMBOL(dp_ioctl_hook); | |
63 | ||
ed099e92 BP |
64 | /** |
65 | * DOC: Locking: | |
064af421 | 66 | * |
ed099e92 BP |
67 | * Writes to device state (add/remove datapath, port, set operations on vports, |
68 | * etc.) are protected by RTNL. | |
064af421 | 69 | * |
ed099e92 BP |
70 | * Writes to other state (flow table modifications, set miscellaneous datapath |
71 | * parameters such as drop frags, etc.) are protected by genl_mutex. The RTNL | |
72 | * lock nests inside genl_mutex. | |
73 | * | |
74 | * Reads are protected by RCU. | |
75 | * | |
76 | * There are a few special cases (mostly stats) that have their own | |
77 | * synchronization but they nest under all of above and don't interact with | |
78 | * each other. | |
064af421 | 79 | */ |
ed099e92 | 80 | |
254f2dc8 BP |
81 | /* Global list of datapaths to enable dumping them all out. |
82 | * Protected by genl_mutex. | |
83 | */ | |
84 | static LIST_HEAD(dps); | |
064af421 | 85 | |
c19e6535 | 86 | static struct vport *new_vport(const struct vport_parms *); |
b85d8d61 | 87 | static int queue_userspace_packets(struct datapath *, struct sk_buff *, |
aa5a8fdc | 88 | const struct dp_upcall_info *); |
064af421 | 89 | |
ed099e92 | 90 | /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */ |
254f2dc8 | 91 | struct datapath *get_dp(int dp_ifindex) |
064af421 | 92 | { |
254f2dc8 BP |
93 | struct datapath *dp = NULL; |
94 | struct net_device *dev; | |
ed099e92 | 95 | |
254f2dc8 BP |
96 | rcu_read_lock(); |
97 | dev = dev_get_by_index_rcu(&init_net, dp_ifindex); | |
98 | if (dev) { | |
99 | struct vport *vport = internal_dev_get_vport(dev); | |
100 | if (vport) | |
101 | dp = vport->dp; | |
102 | } | |
103 | rcu_read_unlock(); | |
104 | ||
105 | return dp; | |
064af421 BP |
106 | } |
107 | EXPORT_SYMBOL_GPL(get_dp); | |
108 | ||
ed099e92 | 109 | /* Must be called with genl_mutex. */ |
3544358a | 110 | static struct flow_table *get_table_protected(struct datapath *dp) |
9abaf6b3 | 111 | { |
ed099e92 | 112 | return rcu_dereference_protected(dp->table, lockdep_genl_is_held()); |
1452b28c JG |
113 | } |
114 | ||
ed099e92 | 115 | /* Must be called with rcu_read_lock or RTNL lock. */ |
027f9007 | 116 | static struct vport *get_vport_protected(struct datapath *dp, u16 port_no) |
1452b28c | 117 | { |
ed099e92 | 118 | return rcu_dereference_rtnl(dp->ports[port_no]); |
9abaf6b3 JG |
119 | } |
120 | ||
f2459fe7 JG |
121 | /* Must be called with rcu_read_lock or RTNL lock. */ |
122 | const char *dp_name(const struct datapath *dp) | |
123 | { | |
df2c07f4 | 124 | return vport_get_name(rcu_dereference_rtnl(dp->ports[OVSP_LOCAL])); |
f2459fe7 JG |
125 | } |
126 | ||
99769a40 JG |
127 | static int get_dpifindex(struct datapath *dp) |
128 | { | |
129 | struct vport *local; | |
130 | int ifindex; | |
131 | ||
132 | rcu_read_lock(); | |
133 | ||
134 | local = get_vport_protected(dp, OVSP_LOCAL); | |
135 | if (local) | |
136 | ifindex = vport_get_ifindex(local); | |
137 | else | |
138 | ifindex = 0; | |
139 | ||
140 | rcu_read_unlock(); | |
141 | ||
142 | return ifindex; | |
143 | } | |
144 | ||
064af421 BP |
145 | static inline size_t br_nlmsg_size(void) |
146 | { | |
147 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
148 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
149 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
150 | + nla_total_size(4) /* IFLA_MASTER */ | |
151 | + nla_total_size(4) /* IFLA_MTU */ | |
064af421 BP |
152 | + nla_total_size(1); /* IFLA_OPERSTATE */ |
153 | } | |
154 | ||
ed099e92 | 155 | /* Caller must hold RTNL lock. */ |
064af421 | 156 | static int dp_fill_ifinfo(struct sk_buff *skb, |
e779d8d9 | 157 | const struct vport *port, |
064af421 BP |
158 | int event, unsigned int flags) |
159 | { | |
027f9007 | 160 | struct datapath *dp = port->dp; |
e779d8d9 | 161 | int ifindex = vport_get_ifindex(port); |
064af421 BP |
162 | struct ifinfomsg *hdr; |
163 | struct nlmsghdr *nlh; | |
164 | ||
f2459fe7 JG |
165 | if (ifindex < 0) |
166 | return ifindex; | |
167 | ||
064af421 BP |
168 | nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags); |
169 | if (nlh == NULL) | |
170 | return -EMSGSIZE; | |
171 | ||
172 | hdr = nlmsg_data(nlh); | |
173 | hdr->ifi_family = AF_BRIDGE; | |
174 | hdr->__ifi_pad = 0; | |
f2459fe7 JG |
175 | hdr->ifi_type = ARPHRD_ETHER; |
176 | hdr->ifi_index = ifindex; | |
e779d8d9 | 177 | hdr->ifi_flags = vport_get_flags(port); |
064af421 BP |
178 | hdr->ifi_change = 0; |
179 | ||
e779d8d9 | 180 | NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port)); |
99769a40 | 181 | NLA_PUT_U32(skb, IFLA_MASTER, get_dpifindex(dp)); |
e779d8d9 | 182 | NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port)); |
064af421 BP |
183 | #ifdef IFLA_OPERSTATE |
184 | NLA_PUT_U8(skb, IFLA_OPERSTATE, | |
e779d8d9 BP |
185 | vport_is_running(port) |
186 | ? vport_get_operstate(port) | |
f2459fe7 | 187 | : IF_OPER_DOWN); |
064af421 BP |
188 | #endif |
189 | ||
e779d8d9 | 190 | NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, vport_get_addr(port)); |
064af421 | 191 | |
064af421 BP |
192 | return nlmsg_end(skb, nlh); |
193 | ||
194 | nla_put_failure: | |
195 | nlmsg_cancel(skb, nlh); | |
196 | return -EMSGSIZE; | |
197 | } | |
198 | ||
ed099e92 | 199 | /* Caller must hold RTNL lock. */ |
e779d8d9 | 200 | static void dp_ifinfo_notify(int event, struct vport *port) |
064af421 | 201 | { |
064af421 BP |
202 | struct sk_buff *skb; |
203 | int err = -ENOBUFS; | |
204 | ||
205 | skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL); | |
206 | if (skb == NULL) | |
207 | goto errout; | |
208 | ||
209 | err = dp_fill_ifinfo(skb, port, event, 0); | |
210 | if (err < 0) { | |
211 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ | |
212 | WARN_ON(err == -EMSGSIZE); | |
213 | kfree_skb(skb); | |
214 | goto errout; | |
215 | } | |
f2459fe7 | 216 | rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
cfe7c1f5 | 217 | return; |
064af421 BP |
218 | errout: |
219 | if (err < 0) | |
f2459fe7 | 220 | rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err); |
064af421 BP |
221 | } |
222 | ||
58c342f6 BP |
223 | static void release_dp(struct kobject *kobj) |
224 | { | |
225 | struct datapath *dp = container_of(kobj, struct datapath, ifobj); | |
226 | kfree(dp); | |
227 | } | |
228 | ||
35f7605b | 229 | static struct kobj_type dp_ktype = { |
58c342f6 BP |
230 | .release = release_dp |
231 | }; | |
232 | ||
46c6a11d JG |
233 | static void destroy_dp_rcu(struct rcu_head *rcu) |
234 | { | |
235 | struct datapath *dp = container_of(rcu, struct datapath, rcu); | |
46c6a11d | 236 | |
3544358a | 237 | flow_tbl_destroy(dp->table); |
46c6a11d JG |
238 | free_percpu(dp->stats_percpu); |
239 | kobject_put(&dp->ifobj); | |
240 | } | |
241 | ||
ed099e92 | 242 | /* Called with RTNL lock and genl_lock. */ |
c19e6535 | 243 | static struct vport *new_vport(const struct vport_parms *parms) |
064af421 | 244 | { |
f2459fe7 | 245 | struct vport *vport; |
f2459fe7 | 246 | |
c19e6535 BP |
247 | vport = vport_add(parms); |
248 | if (!IS_ERR(vport)) { | |
249 | struct datapath *dp = parms->dp; | |
064af421 | 250 | |
c19e6535 | 251 | rcu_assign_pointer(dp->ports[parms->port_no], vport); |
ed099e92 | 252 | list_add(&vport->node, &dp->port_list); |
064af421 | 253 | |
c19e6535 BP |
254 | dp_ifinfo_notify(RTM_NEWLINK, vport); |
255 | } | |
064af421 | 256 | |
c19e6535 | 257 | return vport; |
064af421 BP |
258 | } |
259 | ||
ed099e92 | 260 | /* Called with RTNL lock. */ |
3544358a | 261 | void dp_detach_port(struct vport *p) |
064af421 BP |
262 | { |
263 | ASSERT_RTNL(); | |
264 | ||
df2c07f4 | 265 | if (p->port_no != OVSP_LOCAL) |
0515ceb3 | 266 | dp_sysfs_del_if(p); |
064af421 BP |
267 | dp_ifinfo_notify(RTM_DELLINK, p); |
268 | ||
064af421 | 269 | /* First drop references to device. */ |
ed099e92 | 270 | list_del(&p->node); |
064af421 | 271 | rcu_assign_pointer(p->dp->ports[p->port_no], NULL); |
f2459fe7 | 272 | |
7237e4f4 | 273 | /* Then destroy it. */ |
3544358a | 274 | vport_del(p); |
064af421 BP |
275 | } |
276 | ||
8819fac7 | 277 | /* Must be called with rcu_read_lock. */ |
e779d8d9 | 278 | void dp_process_received_packet(struct vport *p, struct sk_buff *skb) |
064af421 BP |
279 | { |
280 | struct datapath *dp = p->dp; | |
3544358a | 281 | struct sw_flow *flow; |
064af421 | 282 | struct dp_stats_percpu *stats; |
8819fac7 | 283 | int stats_counter_off; |
4c1ad233 | 284 | int error; |
064af421 | 285 | |
e779d8d9 | 286 | OVS_CB(skb)->vport = p; |
a063b0df | 287 | |
3976f6d5 | 288 | if (!OVS_CB(skb)->flow) { |
36956a7d | 289 | struct sw_flow_key key; |
76abe283 | 290 | int key_len; |
b7a31ec1 | 291 | bool is_frag; |
4c1ad233 | 292 | |
3976f6d5 | 293 | /* Extract flow from 'skb' into 'key'. */ |
76abe283 | 294 | error = flow_extract(skb, p->port_no, &key, &key_len, &is_frag); |
3976f6d5 JG |
295 | if (unlikely(error)) { |
296 | kfree_skb(skb); | |
297 | return; | |
298 | } | |
064af421 | 299 | |
b7a31ec1 | 300 | if (is_frag && dp->drop_frags) { |
5b95ab0e | 301 | consume_skb(skb); |
3976f6d5 JG |
302 | stats_counter_off = offsetof(struct dp_stats_percpu, n_frags); |
303 | goto out; | |
304 | } | |
305 | ||
306 | /* Look up flow. */ | |
3544358a PS |
307 | flow = flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len); |
308 | if (unlikely(!flow)) { | |
856081f6 BP |
309 | struct dp_upcall_info upcall; |
310 | ||
df2c07f4 | 311 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 BP |
312 | upcall.key = &key; |
313 | upcall.userdata = 0; | |
314 | upcall.sample_pool = 0; | |
315 | upcall.actions = NULL; | |
316 | upcall.actions_len = 0; | |
317 | dp_upcall(dp, skb, &upcall); | |
3976f6d5 JG |
318 | stats_counter_off = offsetof(struct dp_stats_percpu, n_missed); |
319 | goto out; | |
320 | } | |
321 | ||
3544358a | 322 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
323 | } |
324 | ||
f267de8a | 325 | stats_counter_off = offsetof(struct dp_stats_percpu, n_hit); |
3976f6d5 | 326 | flow_used(OVS_CB(skb)->flow, skb); |
a4af2475 | 327 | execute_actions(dp, skb); |
55574bb0 | 328 | |
8819fac7 | 329 | out: |
55574bb0 | 330 | /* Update datapath statistics. */ |
8819fac7 JG |
331 | local_bh_disable(); |
332 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
333 | |
334 | write_seqcount_begin(&stats->seqlock); | |
8819fac7 | 335 | (*(u64 *)((u8 *)stats + stats_counter_off))++; |
38c6ecbc JG |
336 | write_seqcount_end(&stats->seqlock); |
337 | ||
8819fac7 | 338 | local_bh_enable(); |
064af421 BP |
339 | } |
340 | ||
856081f6 BP |
341 | static void copy_and_csum_skb(struct sk_buff *skb, void *to) |
342 | { | |
343 | u16 csum_start, csum_offset; | |
344 | __wsum csum; | |
345 | ||
346 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
347 | csum_start -= skb_headroom(skb); | |
856081f6 BP |
348 | |
349 | skb_copy_bits(skb, 0, to, csum_start); | |
350 | ||
351 | csum = skb_copy_and_csum_bits(skb, csum_start, to + csum_start, | |
352 | skb->len - csum_start, 0); | |
353 | *(__sum16 *)(to + csum_start + csum_offset) = csum_fold(csum); | |
354 | } | |
355 | ||
aa5a8fdc JG |
356 | static struct genl_family dp_packet_genl_family = { |
357 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
358 | .hdrsize = sizeof(struct ovs_header), |
359 | .name = OVS_PACKET_FAMILY, | |
aa5a8fdc | 360 | .version = 1, |
df2c07f4 | 361 | .maxattr = OVS_PACKET_ATTR_MAX |
aa5a8fdc JG |
362 | }; |
363 | ||
364 | /* Generic Netlink multicast groups for upcalls. | |
365 | * | |
366 | * We really want three unique multicast groups per datapath, but we can't even | |
367 | * get one, because genl_register_mc_group() takes genl_lock, which is also | |
368 | * held during Generic Netlink message processing, so trying to acquire | |
df2c07f4 | 369 | * multicast groups during OVS_DP_NEW processing deadlocks. Instead, we |
aa5a8fdc JG |
370 | * preallocate a few groups and use them round-robin for datapaths. Collision |
371 | * isn't fatal--multicast listeners should check that the family is the one | |
372 | * that they want and discard others--but it wastes time and memory to receive | |
373 | * unwanted messages. | |
374 | */ | |
982b8810 | 375 | #define PACKET_N_MC_GROUPS 16 |
aa5a8fdc | 376 | static struct genl_multicast_group packet_mc_groups[PACKET_N_MC_GROUPS]; |
982b8810 | 377 | |
99769a40 | 378 | static u32 packet_mc_group(int dp_ifindex, u8 cmd) |
982b8810 | 379 | { |
aa5a8fdc | 380 | u32 idx; |
982b8810 | 381 | BUILD_BUG_ON_NOT_POWER_OF_2(PACKET_N_MC_GROUPS); |
aa5a8fdc | 382 | |
99769a40 | 383 | idx = jhash_2words(dp_ifindex, cmd, 0) & (PACKET_N_MC_GROUPS - 1); |
aa5a8fdc JG |
384 | return packet_mc_groups[idx].id; |
385 | } | |
386 | ||
387 | static int packet_register_mc_groups(void) | |
388 | { | |
389 | int i; | |
390 | ||
391 | for (i = 0; i < PACKET_N_MC_GROUPS; i++) { | |
392 | struct genl_multicast_group *group = &packet_mc_groups[i]; | |
393 | int error; | |
394 | ||
395 | sprintf(group->name, "packet%d", i); | |
396 | error = genl_register_mc_group(&dp_packet_genl_family, group); | |
397 | if (error) | |
398 | return error; | |
399 | } | |
400 | return 0; | |
401 | } | |
402 | ||
403 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, const struct dp_upcall_info *upcall_info) | |
404 | { | |
405 | struct dp_stats_percpu *stats; | |
406 | int err; | |
407 | ||
c3729ee4 | 408 | forward_ip_summed(skb, true); |
aa5a8fdc JG |
409 | |
410 | /* Break apart GSO packets into their component pieces. Otherwise | |
411 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
412 | if (skb_is_gso(skb)) { | |
413 | struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); | |
414 | ||
5b95ab0e JG |
415 | if (IS_ERR(nskb)) { |
416 | kfree_skb(skb); | |
417 | err = PTR_ERR(nskb); | |
aa5a8fdc JG |
418 | goto err; |
419 | } | |
5b95ab0e JG |
420 | consume_skb(skb); |
421 | skb = nskb; | |
aa5a8fdc JG |
422 | } |
423 | ||
b85d8d61 | 424 | err = queue_userspace_packets(dp, skb, upcall_info); |
d76195db JG |
425 | if (err) |
426 | goto err; | |
427 | ||
428 | return 0; | |
aa5a8fdc | 429 | |
aa5a8fdc JG |
430 | err: |
431 | local_bh_disable(); | |
432 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
433 | ||
434 | write_seqcount_begin(&stats->seqlock); | |
435 | stats->n_lost++; | |
436 | write_seqcount_end(&stats->seqlock); | |
437 | ||
438 | local_bh_enable(); | |
439 | ||
440 | return err; | |
982b8810 BP |
441 | } |
442 | ||
443 | /* Send each packet in the 'skb' list to userspace for 'dp' as directed by | |
444 | * 'upcall_info'. There will be only one packet unless we broke up a GSO | |
445 | * packet. | |
446 | */ | |
b85d8d61 | 447 | static int queue_userspace_packets(struct datapath *dp, struct sk_buff *skb, |
856081f6 | 448 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 449 | { |
99769a40 JG |
450 | int dp_ifindex; |
451 | u32 group; | |
cb5087ca | 452 | struct sk_buff *nskb; |
cb5087ca BP |
453 | int err; |
454 | ||
99769a40 JG |
455 | dp_ifindex = get_dpifindex(dp); |
456 | if (!dp_ifindex) { | |
457 | err = -ENODEV; | |
458 | nskb = skb->next; | |
459 | goto err_kfree_skbs; | |
460 | } | |
461 | ||
462 | group = packet_mc_group(dp_ifindex, upcall_info->cmd); | |
463 | ||
cb5087ca | 464 | do { |
df2c07f4 | 465 | struct ovs_header *upcall; |
856081f6 BP |
466 | struct sk_buff *user_skb; /* to be queued to userspace */ |
467 | struct nlattr *nla; | |
468 | unsigned int len; | |
cb5087ca BP |
469 | |
470 | nskb = skb->next; | |
471 | skb->next = NULL; | |
472 | ||
303708cc JG |
473 | err = vlan_deaccel_tag(skb); |
474 | if (unlikely(err)) | |
475 | goto err_kfree_skbs; | |
6ce39213 | 476 | |
5721c788 JG |
477 | if (nla_attr_size(skb->len) > USHRT_MAX) { |
478 | err = -EFBIG; | |
51313015 | 479 | goto err_kfree_skbs; |
5721c788 | 480 | } |
51313015 | 481 | |
df2c07f4 | 482 | len = sizeof(struct ovs_header); |
856081f6 BP |
483 | len += nla_total_size(skb->len); |
484 | len += nla_total_size(FLOW_BUFSIZE); | |
485 | if (upcall_info->userdata) | |
486 | len += nla_total_size(8); | |
487 | if (upcall_info->sample_pool) | |
488 | len += nla_total_size(4); | |
489 | if (upcall_info->actions_len) | |
490 | len += nla_total_size(upcall_info->actions_len); | |
491 | ||
982b8810 BP |
492 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
493 | if (!user_skb) { | |
494 | netlink_set_err(INIT_NET_GENL_SOCK, 0, group, -ENOBUFS); | |
5721c788 | 495 | err = -ENOMEM; |
cb5087ca | 496 | goto err_kfree_skbs; |
982b8810 | 497 | } |
cb5087ca | 498 | |
982b8810 | 499 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, 0, upcall_info->cmd); |
99769a40 | 500 | upcall->dp_ifindex = dp_ifindex; |
856081f6 | 501 | |
df2c07f4 | 502 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); |
856081f6 BP |
503 | flow_to_nlattrs(upcall_info->key, user_skb); |
504 | nla_nest_end(user_skb, nla); | |
cb5087ca | 505 | |
856081f6 | 506 | if (upcall_info->userdata) |
df2c07f4 | 507 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, upcall_info->userdata); |
856081f6 | 508 | if (upcall_info->sample_pool) |
df2c07f4 | 509 | nla_put_u32(user_skb, OVS_PACKET_ATTR_SAMPLE_POOL, upcall_info->sample_pool); |
856081f6 BP |
510 | if (upcall_info->actions_len) { |
511 | const struct nlattr *actions = upcall_info->actions; | |
512 | u32 actions_len = upcall_info->actions_len; | |
513 | ||
df2c07f4 | 514 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_ACTIONS); |
856081f6 BP |
515 | memcpy(__skb_put(user_skb, actions_len), actions, actions_len); |
516 | nla_nest_end(user_skb, nla); | |
517 | } | |
518 | ||
df2c07f4 | 519 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); |
856081f6 BP |
520 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
521 | copy_and_csum_skb(skb, nla_data(nla)); | |
522 | else | |
523 | skb_copy_bits(skb, 0, nla_data(nla), skb->len); | |
524 | ||
982b8810 BP |
525 | err = genlmsg_multicast(user_skb, 0, group, GFP_ATOMIC); |
526 | if (err) | |
527 | goto err_kfree_skbs; | |
856081f6 | 528 | |
5b95ab0e | 529 | consume_skb(skb); |
cb5087ca BP |
530 | skb = nskb; |
531 | } while (skb); | |
532 | return 0; | |
533 | ||
534 | err_kfree_skbs: | |
535 | kfree_skb(skb); | |
536 | while ((skb = nskb) != NULL) { | |
537 | nskb = skb->next; | |
538 | kfree_skb(skb); | |
539 | } | |
540 | return err; | |
541 | } | |
542 | ||
ed099e92 | 543 | /* Called with genl_mutex. */ |
254f2dc8 | 544 | static int flush_flows(int dp_ifindex) |
064af421 | 545 | { |
3544358a PS |
546 | struct flow_table *old_table; |
547 | struct flow_table *new_table; | |
9c52546b | 548 | struct datapath *dp; |
9c52546b | 549 | |
254f2dc8 | 550 | dp = get_dp(dp_ifindex); |
9c52546b | 551 | if (!dp) |
ed099e92 | 552 | return -ENODEV; |
8d5ebd83 | 553 | |
9c52546b | 554 | old_table = get_table_protected(dp); |
3544358a | 555 | new_table = flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 556 | if (!new_table) |
ed099e92 | 557 | return -ENOMEM; |
8d5ebd83 JG |
558 | |
559 | rcu_assign_pointer(dp->table, new_table); | |
560 | ||
3544358a | 561 | flow_tbl_deferred_destroy(old_table); |
ed099e92 | 562 | return 0; |
064af421 BP |
563 | } |
564 | ||
37a1300c | 565 | static int validate_actions(const struct nlattr *attr) |
064af421 | 566 | { |
23cad98c BP |
567 | const struct nlattr *a; |
568 | int rem; | |
569 | ||
37a1300c | 570 | nla_for_each_nested(a, attr, rem) { |
df2c07f4 JP |
571 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
572 | [OVS_ACTION_ATTR_OUTPUT] = 4, | |
573 | [OVS_ACTION_ATTR_USERSPACE] = 8, | |
d9065a90 PS |
574 | [OVS_ACTION_ATTR_PUSH_VLAN] = 2, |
575 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
df2c07f4 JP |
576 | [OVS_ACTION_ATTR_SET_DL_SRC] = ETH_ALEN, |
577 | [OVS_ACTION_ATTR_SET_DL_DST] = ETH_ALEN, | |
578 | [OVS_ACTION_ATTR_SET_NW_SRC] = 4, | |
579 | [OVS_ACTION_ATTR_SET_NW_DST] = 4, | |
580 | [OVS_ACTION_ATTR_SET_NW_TOS] = 1, | |
581 | [OVS_ACTION_ATTR_SET_TP_SRC] = 2, | |
582 | [OVS_ACTION_ATTR_SET_TP_DST] = 2, | |
583 | [OVS_ACTION_ATTR_SET_TUNNEL] = 8, | |
584 | [OVS_ACTION_ATTR_SET_PRIORITY] = 4, | |
585 | [OVS_ACTION_ATTR_POP_PRIORITY] = 0, | |
23cad98c BP |
586 | }; |
587 | int type = nla_type(a); | |
588 | ||
df2c07f4 | 589 | if (type > OVS_ACTION_ATTR_MAX || nla_len(a) != action_lens[type]) |
23cad98c BP |
590 | return -EINVAL; |
591 | ||
592 | switch (type) { | |
df2c07f4 | 593 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 594 | return -EINVAL; |
064af421 | 595 | |
df2c07f4 | 596 | case OVS_ACTION_ATTR_USERSPACE: |
d9065a90 | 597 | case OVS_ACTION_ATTR_POP_VLAN: |
df2c07f4 JP |
598 | case OVS_ACTION_ATTR_SET_DL_SRC: |
599 | case OVS_ACTION_ATTR_SET_DL_DST: | |
600 | case OVS_ACTION_ATTR_SET_NW_SRC: | |
601 | case OVS_ACTION_ATTR_SET_NW_DST: | |
602 | case OVS_ACTION_ATTR_SET_TP_SRC: | |
603 | case OVS_ACTION_ATTR_SET_TP_DST: | |
604 | case OVS_ACTION_ATTR_SET_TUNNEL: | |
605 | case OVS_ACTION_ATTR_SET_PRIORITY: | |
606 | case OVS_ACTION_ATTR_POP_PRIORITY: | |
23cad98c BP |
607 | /* No validation needed. */ |
608 | break; | |
609 | ||
df2c07f4 | 610 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
611 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
612 | return -EINVAL; | |
3b1fc5f3 | 613 | break; |
cdee00fd | 614 | |
d9065a90 | 615 | case OVS_ACTION_ATTR_PUSH_VLAN: |
cdee00fd | 616 | if (nla_get_be16(a) & htons(VLAN_CFI_MASK)) |
064af421 | 617 | return -EINVAL; |
23cad98c | 618 | break; |
064af421 | 619 | |
df2c07f4 | 620 | case OVS_ACTION_ATTR_SET_NW_TOS: |
23cad98c BP |
621 | if (nla_get_u8(a) & INET_ECN_MASK) |
622 | return -EINVAL; | |
623 | break; | |
064af421 | 624 | |
23cad98c BP |
625 | default: |
626 | return -EOPNOTSUPP; | |
627 | } | |
628 | } | |
3c5f6de3 | 629 | |
23cad98c BP |
630 | if (rem > 0) |
631 | return -EINVAL; | |
064af421 | 632 | |
23cad98c | 633 | return 0; |
064af421 | 634 | } |
064af421 BP |
635 | static void clear_stats(struct sw_flow *flow) |
636 | { | |
6bfafa55 | 637 | flow->used = 0; |
064af421 | 638 | flow->tcp_flags = 0; |
064af421 BP |
639 | flow->packet_count = 0; |
640 | flow->byte_count = 0; | |
641 | } | |
642 | ||
df2c07f4 | 643 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 644 | { |
df2c07f4 | 645 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 646 | struct nlattr **a = info->attrs; |
e0e57990 | 647 | struct sw_flow_actions *acts; |
982b8810 | 648 | struct sk_buff *packet; |
e0e57990 | 649 | struct sw_flow *flow; |
f7cd0081 | 650 | struct datapath *dp; |
d6569377 BP |
651 | struct ethhdr *eth; |
652 | bool is_frag; | |
3f19d399 | 653 | int len; |
d6569377 | 654 | int err; |
76abe283 | 655 | int key_len; |
064af421 | 656 | |
f7cd0081 | 657 | err = -EINVAL; |
df2c07f4 JP |
658 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
659 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
660 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 661 | goto err; |
064af421 | 662 | |
df2c07f4 | 663 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS]); |
f7cd0081 | 664 | if (err) |
e5cad958 | 665 | goto err; |
f7cd0081 | 666 | |
df2c07f4 | 667 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 668 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
669 | err = -ENOMEM; |
670 | if (!packet) | |
e5cad958 | 671 | goto err; |
3f19d399 BP |
672 | skb_reserve(packet, NET_IP_ALIGN); |
673 | ||
df2c07f4 | 674 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 675 | |
f7cd0081 BP |
676 | skb_reset_mac_header(packet); |
677 | eth = eth_hdr(packet); | |
064af421 | 678 | |
d6569377 BP |
679 | /* Normally, setting the skb 'protocol' field would be handled by a |
680 | * call to eth_type_trans(), but it assumes there's a sending | |
681 | * device, which we may not have. */ | |
682 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 683 | packet->protocol = eth->h_proto; |
d6569377 | 684 | else |
f7cd0081 | 685 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 686 | |
e0e57990 BP |
687 | /* Build an sw_flow for sending this packet. */ |
688 | flow = flow_alloc(); | |
689 | err = PTR_ERR(flow); | |
690 | if (IS_ERR(flow)) | |
e5cad958 | 691 | goto err_kfree_skb; |
064af421 | 692 | |
76abe283 | 693 | err = flow_extract(packet, -1, &flow->key, &key_len, &is_frag); |
e0e57990 BP |
694 | if (err) |
695 | goto err_flow_put; | |
e0e57990 | 696 | |
80e5eed9 BP |
697 | err = flow_metadata_from_nlattrs(&flow->key.eth.in_port, |
698 | &flow->key.eth.tun_id, | |
df2c07f4 | 699 | a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
700 | if (err) |
701 | goto err_flow_put; | |
702 | ||
3544358a | 703 | flow->hash = flow_hash(&flow->key, key_len); |
0fe255df | 704 | |
df2c07f4 | 705 | acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
706 | err = PTR_ERR(acts); |
707 | if (IS_ERR(acts)) | |
708 | goto err_flow_put; | |
709 | rcu_assign_pointer(flow->sf_acts, acts); | |
710 | ||
711 | OVS_CB(packet)->flow = flow; | |
712 | ||
d6569377 | 713 | rcu_read_lock(); |
df2c07f4 | 714 | dp = get_dp(ovs_header->dp_ifindex); |
f7cd0081 | 715 | err = -ENODEV; |
e5cad958 BP |
716 | if (!dp) |
717 | goto err_unlock; | |
cc4015df JG |
718 | |
719 | if (flow->key.eth.in_port < DP_MAX_PORTS) | |
720 | OVS_CB(packet)->vport = get_vport_protected(dp, | |
721 | flow->key.eth.in_port); | |
722 | ||
a4af2475 | 723 | err = execute_actions(dp, packet); |
d6569377 | 724 | rcu_read_unlock(); |
e0e57990 BP |
725 | |
726 | flow_put(flow); | |
e5cad958 | 727 | return err; |
064af421 | 728 | |
e5cad958 BP |
729 | err_unlock: |
730 | rcu_read_unlock(); | |
e0e57990 BP |
731 | err_flow_put: |
732 | flow_put(flow); | |
e5cad958 BP |
733 | err_kfree_skb: |
734 | kfree_skb(packet); | |
735 | err: | |
d6569377 | 736 | return err; |
064af421 BP |
737 | } |
738 | ||
df2c07f4 JP |
739 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
740 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
741 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
742 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
743 | }; |
744 | ||
745 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 746 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
747 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
748 | .policy = packet_policy, | |
df2c07f4 | 749 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
750 | } |
751 | }; | |
752 | ||
df2c07f4 | 753 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 754 | { |
d6569377 | 755 | int i; |
3544358a | 756 | struct flow_table *table = get_table_protected(dp); |
f180c2e2 | 757 | |
3544358a | 758 | stats->n_flows = flow_tbl_count(table); |
064af421 | 759 | |
d6569377 BP |
760 | stats->n_frags = stats->n_hit = stats->n_missed = stats->n_lost = 0; |
761 | for_each_possible_cpu(i) { | |
762 | const struct dp_stats_percpu *percpu_stats; | |
763 | struct dp_stats_percpu local_stats; | |
764 | unsigned seqcount; | |
44e05eca | 765 | |
d6569377 | 766 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 767 | |
d6569377 BP |
768 | do { |
769 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
770 | local_stats = *percpu_stats; | |
771 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
064af421 | 772 | |
d6569377 BP |
773 | stats->n_frags += local_stats.n_frags; |
774 | stats->n_hit += local_stats.n_hit; | |
775 | stats->n_missed += local_stats.n_missed; | |
776 | stats->n_lost += local_stats.n_lost; | |
777 | } | |
778 | } | |
064af421 | 779 | |
df2c07f4 JP |
780 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
781 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
782 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
783 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 784 | }; |
36956a7d | 785 | |
37a1300c BP |
786 | static struct genl_family dp_flow_genl_family = { |
787 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
788 | .hdrsize = sizeof(struct ovs_header), |
789 | .name = OVS_FLOW_FAMILY, | |
37a1300c | 790 | .version = 1, |
df2c07f4 | 791 | .maxattr = OVS_FLOW_ATTR_MAX |
37a1300c | 792 | }; |
ed099e92 | 793 | |
37a1300c | 794 | static struct genl_multicast_group dp_flow_multicast_group = { |
df2c07f4 | 795 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
796 | }; |
797 | ||
798 | /* Called with genl_lock. */ | |
df2c07f4 | 799 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c | 800 | struct sk_buff *skb, u32 pid, u32 seq, u32 flags, u8 cmd) |
d6569377 | 801 | { |
37a1300c | 802 | const int skb_orig_len = skb->len; |
d6569377 | 803 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
804 | struct ovs_flow_stats stats; |
805 | struct ovs_header *ovs_header; | |
d6569377 BP |
806 | struct nlattr *nla; |
807 | unsigned long used; | |
808 | u8 tcp_flags; | |
809 | int err; | |
064af421 | 810 | |
d6569377 | 811 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 812 | lockdep_genl_is_held()); |
064af421 | 813 | |
df2c07f4 JP |
814 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
815 | if (!ovs_header) | |
37a1300c | 816 | return -EMSGSIZE; |
d6569377 | 817 | |
99769a40 | 818 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 819 | |
df2c07f4 | 820 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
821 | if (!nla) |
822 | goto nla_put_failure; | |
823 | err = flow_to_nlattrs(&flow->key, skb); | |
824 | if (err) | |
37a1300c | 825 | goto error; |
d6569377 BP |
826 | nla_nest_end(skb, nla); |
827 | ||
828 | spin_lock_bh(&flow->lock); | |
829 | used = flow->used; | |
830 | stats.n_packets = flow->packet_count; | |
831 | stats.n_bytes = flow->byte_count; | |
832 | tcp_flags = flow->tcp_flags; | |
833 | spin_unlock_bh(&flow->lock); | |
834 | ||
835 | if (used) | |
df2c07f4 | 836 | NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used)); |
d6569377 BP |
837 | |
838 | if (stats.n_packets) | |
df2c07f4 | 839 | NLA_PUT(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats); |
d6569377 BP |
840 | |
841 | if (tcp_flags) | |
df2c07f4 | 842 | NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags); |
d6569377 | 843 | |
df2c07f4 | 844 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
845 | * this is the first flow to be dumped into 'skb'. This is unusual for |
846 | * Netlink but individual action lists can be longer than | |
847 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
848 | * The userspace caller can always fetch the actions separately if it | |
849 | * really wants them. (Most userspace callers in fact don't care.) | |
850 | * | |
851 | * This can only fail for dump operations because the skb is always | |
852 | * properly sized for single flows. | |
853 | */ | |
df2c07f4 | 854 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
855 | sf_acts->actions); |
856 | if (err < 0 && skb_orig_len) | |
857 | goto error; | |
37a1300c | 858 | |
df2c07f4 | 859 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
860 | |
861 | nla_put_failure: | |
862 | err = -EMSGSIZE; | |
37a1300c | 863 | error: |
df2c07f4 | 864 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 865 | return err; |
44e05eca BP |
866 | } |
867 | ||
df2c07f4 | 868 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 869 | { |
37a1300c BP |
870 | const struct sw_flow_actions *sf_acts; |
871 | int len; | |
d6569377 | 872 | |
37a1300c BP |
873 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
874 | lockdep_genl_is_held()); | |
d6569377 | 875 | |
df2c07f4 JP |
876 | len = nla_total_size(FLOW_BUFSIZE); /* OVS_FLOW_ATTR_KEY */ |
877 | len += nla_total_size(sf_acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
878 | len += nla_total_size(sizeof(struct ovs_flow_stats)); /* OVS_FLOW_ATTR_STATS */ | |
879 | len += nla_total_size(1); /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
880 | len += nla_total_size(8); /* OVS_FLOW_ATTR_USED */ | |
881 | return genlmsg_new(NLMSG_ALIGN(sizeof(struct ovs_header)) + len, GFP_KERNEL); | |
37a1300c | 882 | } |
8d5ebd83 | 883 | |
df2c07f4 | 884 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c BP |
885 | u32 pid, u32 seq, u8 cmd) |
886 | { | |
887 | struct sk_buff *skb; | |
888 | int retval; | |
d6569377 | 889 | |
df2c07f4 | 890 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
891 | if (!skb) |
892 | return ERR_PTR(-ENOMEM); | |
d6569377 | 893 | |
df2c07f4 | 894 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 895 | BUG_ON(retval < 0); |
d6569377 | 896 | return skb; |
064af421 BP |
897 | } |
898 | ||
df2c07f4 | 899 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 900 | { |
37a1300c | 901 | struct nlattr **a = info->attrs; |
df2c07f4 | 902 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 903 | struct sw_flow_key key; |
d6569377 | 904 | struct sw_flow *flow; |
37a1300c | 905 | struct sk_buff *reply; |
9c52546b | 906 | struct datapath *dp; |
3544358a | 907 | struct flow_table *table; |
bc4a05c6 | 908 | int error; |
76abe283 | 909 | int key_len; |
064af421 | 910 | |
37a1300c BP |
911 | /* Extract key. */ |
912 | error = -EINVAL; | |
df2c07f4 | 913 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 914 | goto error; |
df2c07f4 | 915 | error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
916 | if (error) |
917 | goto error; | |
064af421 | 918 | |
37a1300c | 919 | /* Validate actions. */ |
df2c07f4 JP |
920 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
921 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS]); | |
37a1300c BP |
922 | if (error) |
923 | goto error; | |
df2c07f4 | 924 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
925 | error = -EINVAL; |
926 | goto error; | |
927 | } | |
928 | ||
df2c07f4 | 929 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 930 | error = -ENODEV; |
9c52546b | 931 | if (!dp) |
37a1300c | 932 | goto error; |
704a1e09 | 933 | |
d6569377 | 934 | table = get_table_protected(dp); |
3544358a PS |
935 | flow = flow_tbl_lookup(table, &key, key_len); |
936 | if (!flow) { | |
d6569377 BP |
937 | struct sw_flow_actions *acts; |
938 | ||
939 | /* Bail out if we're not allowed to create a new flow. */ | |
940 | error = -ENOENT; | |
df2c07f4 | 941 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 942 | goto error; |
d6569377 BP |
943 | |
944 | /* Expand table, if necessary, to make room. */ | |
3544358a PS |
945 | if (flow_tbl_need_to_expand(table)) { |
946 | struct flow_table *new_table; | |
947 | ||
948 | new_table = flow_tbl_expand(table); | |
949 | if (!IS_ERR(new_table)) { | |
950 | rcu_assign_pointer(dp->table, new_table); | |
951 | flow_tbl_deferred_destroy(table); | |
952 | table = get_table_protected(dp); | |
953 | } | |
d6569377 BP |
954 | } |
955 | ||
956 | /* Allocate flow. */ | |
957 | flow = flow_alloc(); | |
958 | if (IS_ERR(flow)) { | |
959 | error = PTR_ERR(flow); | |
37a1300c | 960 | goto error; |
d6569377 | 961 | } |
37a1300c | 962 | flow->key = key; |
d6569377 BP |
963 | clear_stats(flow); |
964 | ||
965 | /* Obtain actions. */ | |
df2c07f4 | 966 | acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
967 | error = PTR_ERR(acts); |
968 | if (IS_ERR(acts)) | |
969 | goto error_free_flow; | |
970 | rcu_assign_pointer(flow->sf_acts, acts); | |
971 | ||
d6569377 | 972 | /* Put flow in bucket. */ |
3544358a PS |
973 | flow->hash = flow_hash(&key, key_len); |
974 | flow_tbl_insert(table, flow); | |
37a1300c | 975 | |
df2c07f4 JP |
976 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
977 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 BP |
978 | } else { |
979 | /* We found a matching flow. */ | |
980 | struct sw_flow_actions *old_acts; | |
981 | ||
982 | /* Bail out if we're not allowed to modify an existing flow. | |
983 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
984 | * because Generic Netlink treats the latter as a dump | |
985 | * request. We also accept NLM_F_EXCL in case that bug ever | |
986 | * gets fixed. | |
987 | */ | |
988 | error = -EEXIST; | |
df2c07f4 | 989 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
990 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
991 | goto error; | |
d6569377 BP |
992 | |
993 | /* Update actions. */ | |
d6569377 | 994 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 995 | lockdep_genl_is_held()); |
df2c07f4 JP |
996 | if (a[OVS_FLOW_ATTR_ACTIONS] && |
997 | (old_acts->actions_len != nla_len(a[OVS_FLOW_ATTR_ACTIONS]) || | |
998 | memcmp(old_acts->actions, nla_data(a[OVS_FLOW_ATTR_ACTIONS]), | |
37a1300c | 999 | old_acts->actions_len))) { |
d6569377 BP |
1000 | struct sw_flow_actions *new_acts; |
1001 | ||
df2c07f4 | 1002 | new_acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1003 | error = PTR_ERR(new_acts); |
1004 | if (IS_ERR(new_acts)) | |
37a1300c | 1005 | goto error; |
d6569377 BP |
1006 | |
1007 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
1008 | flow_deferred_free_acts(old_acts); | |
1009 | } | |
1010 | ||
df2c07f4 JP |
1011 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1012 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1013 | |
1014 | /* Clear stats. */ | |
df2c07f4 | 1015 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1016 | spin_lock_bh(&flow->lock); |
1017 | clear_stats(flow); | |
1018 | spin_unlock_bh(&flow->lock); | |
1019 | } | |
9c52546b | 1020 | } |
37a1300c BP |
1021 | |
1022 | if (!IS_ERR(reply)) | |
1023 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1024 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1025 | else | |
1026 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1027 | dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1028 | return 0; |
704a1e09 | 1029 | |
d6569377 BP |
1030 | error_free_flow: |
1031 | flow_put(flow); | |
37a1300c | 1032 | error: |
9c52546b | 1033 | return error; |
704a1e09 BP |
1034 | } |
1035 | ||
df2c07f4 | 1036 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1037 | { |
37a1300c | 1038 | struct nlattr **a = info->attrs; |
df2c07f4 | 1039 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1040 | struct sw_flow_key key; |
37a1300c | 1041 | struct sk_buff *reply; |
704a1e09 | 1042 | struct sw_flow *flow; |
9c52546b | 1043 | struct datapath *dp; |
3544358a | 1044 | struct flow_table *table; |
9c52546b | 1045 | int err; |
76abe283 | 1046 | int key_len; |
704a1e09 | 1047 | |
df2c07f4 | 1048 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1049 | return -EINVAL; |
df2c07f4 | 1050 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1051 | if (err) |
1052 | return err; | |
704a1e09 | 1053 | |
df2c07f4 | 1054 | dp = get_dp(ovs_header->dp_ifindex); |
9c52546b | 1055 | if (!dp) |
ed099e92 | 1056 | return -ENODEV; |
704a1e09 | 1057 | |
9c52546b | 1058 | table = get_table_protected(dp); |
3544358a PS |
1059 | flow = flow_tbl_lookup(table, &key, key_len); |
1060 | if (!flow) | |
ed099e92 | 1061 | return -ENOENT; |
d6569377 | 1062 | |
df2c07f4 | 1063 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1064 | if (IS_ERR(reply)) |
1065 | return PTR_ERR(reply); | |
36956a7d | 1066 | |
37a1300c | 1067 | return genlmsg_reply(reply, info); |
d6569377 | 1068 | } |
9c52546b | 1069 | |
df2c07f4 | 1070 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1071 | { |
37a1300c | 1072 | struct nlattr **a = info->attrs; |
df2c07f4 | 1073 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1074 | struct sw_flow_key key; |
37a1300c | 1075 | struct sk_buff *reply; |
d6569377 | 1076 | struct sw_flow *flow; |
d6569377 | 1077 | struct datapath *dp; |
3544358a | 1078 | struct flow_table *table; |
d6569377 | 1079 | int err; |
76abe283 | 1080 | int key_len; |
36956a7d | 1081 | |
df2c07f4 JP |
1082 | if (!a[OVS_FLOW_ATTR_KEY]) |
1083 | return flush_flows(ovs_header->dp_ifindex); | |
1084 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
37a1300c BP |
1085 | if (err) |
1086 | return err; | |
d6569377 | 1087 | |
df2c07f4 | 1088 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1089 | if (!dp) |
37a1300c | 1090 | return -ENODEV; |
d6569377 | 1091 | |
37a1300c | 1092 | table = get_table_protected(dp); |
3544358a PS |
1093 | flow = flow_tbl_lookup(table, &key, key_len); |
1094 | if (!flow) | |
37a1300c | 1095 | return -ENOENT; |
d6569377 | 1096 | |
df2c07f4 | 1097 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1098 | if (!reply) |
1099 | return -ENOMEM; | |
1100 | ||
3544358a | 1101 | flow_tbl_remove(table, flow); |
37a1300c | 1102 | |
df2c07f4 JP |
1103 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1104 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1105 | BUG_ON(err < 0); |
1106 | ||
1107 | flow_deferred_free(flow); | |
1108 | ||
1109 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1110 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
df2c07f4 | 1114 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1115 | { |
df2c07f4 | 1116 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c BP |
1117 | struct datapath *dp; |
1118 | ||
df2c07f4 | 1119 | dp = get_dp(ovs_header->dp_ifindex); |
37a1300c BP |
1120 | if (!dp) |
1121 | return -ENODEV; | |
1122 | ||
1123 | for (;;) { | |
37a1300c BP |
1124 | struct sw_flow *flow; |
1125 | u32 bucket, obj; | |
1126 | ||
1127 | bucket = cb->args[0]; | |
1128 | obj = cb->args[1]; | |
3544358a PS |
1129 | flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj); |
1130 | if (!flow) | |
37a1300c BP |
1131 | break; |
1132 | ||
df2c07f4 | 1133 | if (ovs_flow_cmd_fill_info(flow, dp, skb, NETLINK_CB(cb->skb).pid, |
37a1300c | 1134 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1135 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1136 | break; |
1137 | ||
1138 | cb->args[0] = bucket; | |
1139 | cb->args[1] = obj; | |
1140 | } | |
1141 | return skb->len; | |
704a1e09 BP |
1142 | } |
1143 | ||
37a1300c | 1144 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1145 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1146 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1147 | .policy = flow_policy, | |
df2c07f4 | 1148 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1149 | }, |
df2c07f4 | 1150 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1151 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1152 | .policy = flow_policy, | |
df2c07f4 | 1153 | .doit = ovs_flow_cmd_del |
37a1300c | 1154 | }, |
df2c07f4 | 1155 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1156 | .flags = 0, /* OK for unprivileged users. */ |
1157 | .policy = flow_policy, | |
df2c07f4 JP |
1158 | .doit = ovs_flow_cmd_get, |
1159 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1160 | }, |
df2c07f4 | 1161 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1162 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1163 | .policy = flow_policy, | |
df2c07f4 | 1164 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1165 | }, |
1166 | }; | |
1167 | ||
df2c07f4 | 1168 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1169 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1170 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1171 | #endif |
df2c07f4 JP |
1172 | [OVS_DP_ATTR_IPV4_FRAGS] = { .type = NLA_U32 }, |
1173 | [OVS_DP_ATTR_SAMPLING] = { .type = NLA_U32 }, | |
d6569377 BP |
1174 | }; |
1175 | ||
aaff4b55 BP |
1176 | static struct genl_family dp_datapath_genl_family = { |
1177 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1178 | .hdrsize = sizeof(struct ovs_header), |
1179 | .name = OVS_DATAPATH_FAMILY, | |
aaff4b55 | 1180 | .version = 1, |
df2c07f4 | 1181 | .maxattr = OVS_DP_ATTR_MAX |
aaff4b55 BP |
1182 | }; |
1183 | ||
1184 | static struct genl_multicast_group dp_datapath_multicast_group = { | |
df2c07f4 | 1185 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1186 | }; |
1187 | ||
df2c07f4 | 1188 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1189 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1190 | { |
df2c07f4 | 1191 | struct ovs_header *ovs_header; |
d6569377 | 1192 | struct nlattr *nla; |
064af421 | 1193 | int err; |
99769a40 | 1194 | int dp_ifindex = get_dpifindex(dp); |
064af421 | 1195 | |
df2c07f4 | 1196 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1197 | flags, cmd); |
df2c07f4 | 1198 | if (!ovs_header) |
aaff4b55 | 1199 | goto error; |
064af421 | 1200 | |
99769a40 | 1201 | ovs_header->dp_ifindex = dp_ifindex; |
064af421 | 1202 | |
d6569377 | 1203 | rcu_read_lock(); |
df2c07f4 | 1204 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp)); |
d6569377 | 1205 | rcu_read_unlock(); |
064af421 | 1206 | if (err) |
d6569377 | 1207 | goto nla_put_failure; |
064af421 | 1208 | |
df2c07f4 | 1209 | nla = nla_reserve(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats)); |
d6569377 BP |
1210 | if (!nla) |
1211 | goto nla_put_failure; | |
1212 | get_dp_stats(dp, nla_data(nla)); | |
1213 | ||
df2c07f4 JP |
1214 | NLA_PUT_U32(skb, OVS_DP_ATTR_IPV4_FRAGS, |
1215 | dp->drop_frags ? OVS_DP_FRAG_DROP : OVS_DP_FRAG_ZERO); | |
d6569377 BP |
1216 | |
1217 | if (dp->sflow_probability) | |
df2c07f4 | 1218 | NLA_PUT_U32(skb, OVS_DP_ATTR_SAMPLING, dp->sflow_probability); |
d6569377 | 1219 | |
df2c07f4 | 1220 | nla = nla_nest_start(skb, OVS_DP_ATTR_MCGROUPS); |
982b8810 BP |
1221 | if (!nla) |
1222 | goto nla_put_failure; | |
99769a40 JG |
1223 | NLA_PUT_U32(skb, OVS_PACKET_CMD_MISS, |
1224 | packet_mc_group(dp_ifindex, OVS_PACKET_CMD_MISS)); | |
1225 | NLA_PUT_U32(skb, OVS_PACKET_CMD_ACTION, | |
1226 | packet_mc_group(dp_ifindex, OVS_PACKET_CMD_ACTION)); | |
1227 | NLA_PUT_U32(skb, OVS_PACKET_CMD_SAMPLE, | |
1228 | packet_mc_group(dp_ifindex, OVS_PACKET_CMD_SAMPLE)); | |
982b8810 BP |
1229 | nla_nest_end(skb, nla); |
1230 | ||
df2c07f4 | 1231 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1232 | |
1233 | nla_put_failure: | |
df2c07f4 | 1234 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1235 | error: |
1236 | return -EMSGSIZE; | |
d6569377 BP |
1237 | } |
1238 | ||
df2c07f4 | 1239 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1240 | u32 seq, u8 cmd) |
d6569377 | 1241 | { |
d6569377 | 1242 | struct sk_buff *skb; |
aaff4b55 | 1243 | int retval; |
d6569377 | 1244 | |
aaff4b55 | 1245 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1246 | if (!skb) |
d6569377 | 1247 | return ERR_PTR(-ENOMEM); |
659586ef | 1248 | |
df2c07f4 | 1249 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1250 | if (retval < 0) { |
1251 | kfree_skb(skb); | |
1252 | return ERR_PTR(retval); | |
1253 | } | |
1254 | return skb; | |
1255 | } | |
9dca7bd5 | 1256 | |
df2c07f4 | 1257 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1258 | { |
df2c07f4 JP |
1259 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) { |
1260 | u32 frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]); | |
9dca7bd5 | 1261 | |
df2c07f4 | 1262 | if (frags != OVS_DP_FRAG_ZERO && frags != OVS_DP_FRAG_DROP) |
aaff4b55 | 1263 | return -EINVAL; |
d6569377 BP |
1264 | } |
1265 | ||
df2c07f4 | 1266 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1267 | } |
1268 | ||
ed099e92 | 1269 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
df2c07f4 | 1270 | static struct datapath *lookup_datapath(struct ovs_header *ovs_header, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1271 | { |
254f2dc8 BP |
1272 | struct datapath *dp; |
1273 | ||
df2c07f4 JP |
1274 | if (!a[OVS_DP_ATTR_NAME]) |
1275 | dp = get_dp(ovs_header->dp_ifindex); | |
254f2dc8 | 1276 | else { |
d6569377 | 1277 | struct vport *vport; |
d6569377 | 1278 | |
057dd6d2 | 1279 | rcu_read_lock(); |
df2c07f4 JP |
1280 | vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME])); |
1281 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
057dd6d2 | 1282 | rcu_read_unlock(); |
d6569377 | 1283 | } |
254f2dc8 | 1284 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1285 | } |
1286 | ||
ed099e92 | 1287 | /* Called with genl_mutex. */ |
df2c07f4 | 1288 | static void change_datapath(struct datapath *dp, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1289 | { |
df2c07f4 JP |
1290 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) |
1291 | dp->drop_frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]) == OVS_DP_FRAG_DROP; | |
1292 | if (a[OVS_DP_ATTR_SAMPLING]) | |
1293 | dp->sflow_probability = nla_get_u32(a[OVS_DP_ATTR_SAMPLING]); | |
d6569377 BP |
1294 | } |
1295 | ||
df2c07f4 | 1296 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1297 | { |
aaff4b55 | 1298 | struct nlattr **a = info->attrs; |
d6569377 | 1299 | struct vport_parms parms; |
aaff4b55 | 1300 | struct sk_buff *reply; |
d6569377 BP |
1301 | struct datapath *dp; |
1302 | struct vport *vport; | |
d6569377 | 1303 | int err; |
d6569377 | 1304 | |
d6569377 | 1305 | err = -EINVAL; |
df2c07f4 | 1306 | if (!a[OVS_DP_ATTR_NAME]) |
aaff4b55 BP |
1307 | goto err; |
1308 | ||
df2c07f4 | 1309 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1310 | if (err) |
1311 | goto err; | |
d6569377 BP |
1312 | |
1313 | rtnl_lock(); | |
d6569377 BP |
1314 | err = -ENODEV; |
1315 | if (!try_module_get(THIS_MODULE)) | |
ed099e92 | 1316 | goto err_unlock_rtnl; |
d6569377 | 1317 | |
d6569377 BP |
1318 | err = -ENOMEM; |
1319 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1320 | if (dp == NULL) | |
1321 | goto err_put_module; | |
1322 | INIT_LIST_HEAD(&dp->port_list); | |
d6569377 BP |
1323 | |
1324 | /* Initialize kobject for bridge. This will be added as | |
1325 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1326 | dp->ifobj.kset = NULL; | |
1327 | kobject_init(&dp->ifobj, &dp_ktype); | |
1328 | ||
1329 | /* Allocate table. */ | |
1330 | err = -ENOMEM; | |
3544358a | 1331 | rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1332 | if (!dp->table) |
1333 | goto err_free_dp; | |
1334 | ||
99769a40 JG |
1335 | dp->drop_frags = 0; |
1336 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
1337 | if (!dp->stats_percpu) { | |
1338 | err = -ENOMEM; | |
1339 | goto err_destroy_table; | |
1340 | } | |
1341 | ||
1342 | change_datapath(dp, a); | |
1343 | ||
d6569377 | 1344 | /* Set up our datapath device. */ |
df2c07f4 JP |
1345 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1346 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1347 | parms.options = NULL; |
1348 | parms.dp = dp; | |
df2c07f4 | 1349 | parms.port_no = OVSP_LOCAL; |
d6569377 BP |
1350 | vport = new_vport(&parms); |
1351 | if (IS_ERR(vport)) { | |
1352 | err = PTR_ERR(vport); | |
1353 | if (err == -EBUSY) | |
1354 | err = -EEXIST; | |
1355 | ||
99769a40 | 1356 | goto err_destroy_percpu; |
d6569377 | 1357 | } |
d6569377 | 1358 | |
df2c07f4 | 1359 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1360 | err = PTR_ERR(reply); |
1361 | if (IS_ERR(reply)) | |
1362 | goto err_destroy_local_port; | |
1363 | ||
254f2dc8 | 1364 | list_add_tail(&dp->list_node, &dps); |
d6569377 BP |
1365 | dp_sysfs_add_dp(dp); |
1366 | ||
d6569377 BP |
1367 | rtnl_unlock(); |
1368 | ||
aaff4b55 BP |
1369 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1370 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
d6569377 BP |
1371 | return 0; |
1372 | ||
1373 | err_destroy_local_port: | |
df2c07f4 | 1374 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
99769a40 JG |
1375 | err_destroy_percpu: |
1376 | free_percpu(dp->stats_percpu); | |
d6569377 | 1377 | err_destroy_table: |
3544358a | 1378 | flow_tbl_destroy(get_table_protected(dp)); |
d6569377 | 1379 | err_free_dp: |
d6569377 BP |
1380 | kfree(dp); |
1381 | err_put_module: | |
1382 | module_put(THIS_MODULE); | |
ed099e92 | 1383 | err_unlock_rtnl: |
d6569377 | 1384 | rtnl_unlock(); |
d6569377 | 1385 | err: |
064af421 BP |
1386 | return err; |
1387 | } | |
1388 | ||
df2c07f4 | 1389 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1390 | { |
ed099e92 | 1391 | struct vport *vport, *next_vport; |
aaff4b55 | 1392 | struct sk_buff *reply; |
9c52546b | 1393 | struct datapath *dp; |
d6569377 | 1394 | int err; |
44e05eca | 1395 | |
df2c07f4 | 1396 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 | 1397 | if (err) |
d6569377 | 1398 | goto exit; |
44e05eca | 1399 | |
d6569377 | 1400 | rtnl_lock(); |
aaff4b55 | 1401 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 BP |
1402 | err = PTR_ERR(dp); |
1403 | if (IS_ERR(dp)) | |
aaff4b55 BP |
1404 | goto exit_unlock; |
1405 | ||
df2c07f4 | 1406 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_DEL); |
aaff4b55 BP |
1407 | err = PTR_ERR(reply); |
1408 | if (IS_ERR(reply)) | |
1409 | goto exit_unlock; | |
9c52546b | 1410 | |
ed099e92 | 1411 | list_for_each_entry_safe (vport, next_vport, &dp->port_list, node) |
df2c07f4 | 1412 | if (vport->port_no != OVSP_LOCAL) |
ed099e92 BP |
1413 | dp_detach_port(vport); |
1414 | ||
1415 | dp_sysfs_del_dp(dp); | |
254f2dc8 | 1416 | list_del(&dp->list_node); |
df2c07f4 | 1417 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
ed099e92 | 1418 | |
99620d2c JG |
1419 | /* rtnl_unlock() will wait until all the references to devices that |
1420 | * are pending unregistration have been dropped. We do it here to | |
1421 | * ensure that any internal devices (which contain DP pointers) are | |
1422 | * fully destroyed before freeing the datapath. | |
1423 | */ | |
1424 | rtnl_unlock(); | |
1425 | ||
ed099e92 BP |
1426 | call_rcu(&dp->rcu, destroy_dp_rcu); |
1427 | module_put(THIS_MODULE); | |
1428 | ||
aaff4b55 BP |
1429 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1430 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
99620d2c JG |
1431 | |
1432 | return 0; | |
d6569377 | 1433 | |
aaff4b55 | 1434 | exit_unlock: |
d6569377 BP |
1435 | rtnl_unlock(); |
1436 | exit: | |
1437 | return err; | |
44e05eca BP |
1438 | } |
1439 | ||
df2c07f4 | 1440 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1441 | { |
aaff4b55 | 1442 | struct sk_buff *reply; |
d6569377 | 1443 | struct datapath *dp; |
d6569377 | 1444 | int err; |
064af421 | 1445 | |
df2c07f4 | 1446 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1447 | if (err) |
1448 | return err; | |
38c6ecbc | 1449 | |
aaff4b55 | 1450 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1451 | if (IS_ERR(dp)) |
aaff4b55 | 1452 | return PTR_ERR(dp); |
38c6ecbc | 1453 | |
aaff4b55 | 1454 | change_datapath(dp, info->attrs); |
38c6ecbc | 1455 | |
df2c07f4 | 1456 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1457 | if (IS_ERR(reply)) { |
1458 | err = PTR_ERR(reply); | |
1459 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1460 | dp_datapath_multicast_group.id, err); | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1465 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1466 | return 0; | |
064af421 BP |
1467 | } |
1468 | ||
df2c07f4 | 1469 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1470 | { |
aaff4b55 | 1471 | struct sk_buff *reply; |
d6569377 | 1472 | struct datapath *dp; |
d6569377 | 1473 | int err; |
1dcf111b | 1474 | |
df2c07f4 | 1475 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1476 | if (err) |
1477 | return err; | |
1dcf111b | 1478 | |
aaff4b55 | 1479 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1480 | if (IS_ERR(dp)) |
aaff4b55 | 1481 | return PTR_ERR(dp); |
1dcf111b | 1482 | |
df2c07f4 | 1483 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1484 | if (IS_ERR(reply)) |
1485 | return PTR_ERR(reply); | |
1486 | ||
1487 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1488 | } |
1489 | ||
df2c07f4 | 1490 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1491 | { |
254f2dc8 BP |
1492 | struct datapath *dp; |
1493 | int skip = cb->args[0]; | |
1494 | int i = 0; | |
a7786963 | 1495 | |
254f2dc8 BP |
1496 | list_for_each_entry (dp, &dps, list_node) { |
1497 | if (i < skip) | |
d6569377 | 1498 | continue; |
df2c07f4 | 1499 | if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, |
aaff4b55 | 1500 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1501 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1502 | break; |
254f2dc8 | 1503 | i++; |
a7786963 | 1504 | } |
aaff4b55 | 1505 | |
254f2dc8 BP |
1506 | cb->args[0] = i; |
1507 | ||
aaff4b55 | 1508 | return skb->len; |
c19e6535 BP |
1509 | } |
1510 | ||
aaff4b55 | 1511 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1512 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1513 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1514 | .policy = datapath_policy, | |
df2c07f4 | 1515 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1516 | }, |
df2c07f4 | 1517 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1518 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1519 | .policy = datapath_policy, | |
df2c07f4 | 1520 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1521 | }, |
df2c07f4 | 1522 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1523 | .flags = 0, /* OK for unprivileged users. */ |
1524 | .policy = datapath_policy, | |
df2c07f4 JP |
1525 | .doit = ovs_dp_cmd_get, |
1526 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1527 | }, |
df2c07f4 | 1528 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1529 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1530 | .policy = datapath_policy, | |
df2c07f4 | 1531 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1532 | }, |
1533 | }; | |
1534 | ||
df2c07f4 | 1535 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1536 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1537 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1538 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1539 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1540 | #else |
f613a0d7 | 1541 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1542 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1543 | #endif |
d48c88ec JG |
1544 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1545 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
df2c07f4 | 1546 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1547 | }; |
1548 | ||
f0fef760 BP |
1549 | static struct genl_family dp_vport_genl_family = { |
1550 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1551 | .hdrsize = sizeof(struct ovs_header), |
1552 | .name = OVS_VPORT_FAMILY, | |
f0fef760 | 1553 | .version = 1, |
df2c07f4 | 1554 | .maxattr = OVS_VPORT_ATTR_MAX |
f0fef760 BP |
1555 | }; |
1556 | ||
f14d8083 | 1557 | struct genl_multicast_group dp_vport_multicast_group = { |
df2c07f4 | 1558 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1559 | }; |
1560 | ||
1561 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1562 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1563 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1564 | { |
df2c07f4 | 1565 | struct ovs_header *ovs_header; |
c19e6535 | 1566 | struct nlattr *nla; |
ff8d7a5e | 1567 | int ifindex; |
c19e6535 BP |
1568 | int err; |
1569 | ||
df2c07f4 | 1570 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1571 | flags, cmd); |
df2c07f4 | 1572 | if (!ovs_header) |
f0fef760 | 1573 | return -EMSGSIZE; |
c19e6535 | 1574 | |
99769a40 | 1575 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1576 | |
df2c07f4 JP |
1577 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
1578 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport_get_type(vport)); | |
1579 | NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport_get_name(vport)); | |
c19e6535 | 1580 | |
f613a0d7 | 1581 | nla = nla_reserve(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats)); |
c19e6535 BP |
1582 | if (!nla) |
1583 | goto nla_put_failure; | |
f613a0d7 PS |
1584 | |
1585 | vport_get_stats(vport, nla_data(nla)); | |
c19e6535 | 1586 | |
df2c07f4 | 1587 | NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, vport_get_addr(vport)); |
c19e6535 | 1588 | |
c19e6535 | 1589 | err = vport_get_options(vport, skb); |
f0fef760 BP |
1590 | if (err == -EMSGSIZE) |
1591 | goto error; | |
c19e6535 BP |
1592 | |
1593 | ifindex = vport_get_ifindex(vport); | |
1594 | if (ifindex > 0) | |
df2c07f4 | 1595 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_IFINDEX, ifindex); |
c19e6535 | 1596 | |
df2c07f4 | 1597 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1598 | |
1599 | nla_put_failure: | |
1600 | err = -EMSGSIZE; | |
f0fef760 | 1601 | error: |
df2c07f4 | 1602 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1603 | return err; |
064af421 BP |
1604 | } |
1605 | ||
f0fef760 | 1606 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1607 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1608 | u32 seq, u8 cmd) | |
064af421 | 1609 | { |
c19e6535 | 1610 | struct sk_buff *skb; |
f0fef760 | 1611 | int retval; |
c19e6535 | 1612 | |
f0fef760 | 1613 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1614 | if (!skb) |
1615 | return ERR_PTR(-ENOMEM); | |
1616 | ||
df2c07f4 | 1617 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1618 | if (retval < 0) { |
1619 | kfree_skb(skb); | |
1620 | return ERR_PTR(retval); | |
1621 | } | |
c19e6535 | 1622 | return skb; |
f0fef760 | 1623 | } |
c19e6535 | 1624 | |
df2c07f4 | 1625 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1626 | { |
df2c07f4 | 1627 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1628 | } |
51d4d598 | 1629 | |
ed099e92 | 1630 | /* Called with RTNL lock or RCU read lock. */ |
df2c07f4 JP |
1631 | static struct vport *lookup_vport(struct ovs_header *ovs_header, |
1632 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
c19e6535 BP |
1633 | { |
1634 | struct datapath *dp; | |
1635 | struct vport *vport; | |
1636 | ||
df2c07f4 JP |
1637 | if (a[OVS_VPORT_ATTR_NAME]) { |
1638 | vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME])); | |
ed099e92 | 1639 | if (!vport) |
c19e6535 | 1640 | return ERR_PTR(-ENODEV); |
c19e6535 | 1641 | return vport; |
df2c07f4 JP |
1642 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1643 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1644 | |
1645 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1646 | return ERR_PTR(-EFBIG); |
c19e6535 | 1647 | |
df2c07f4 | 1648 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1649 | if (!dp) |
1650 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1651 | |
c19e6535 | 1652 | vport = get_vport_protected(dp, port_no); |
ed099e92 | 1653 | if (!vport) |
c19e6535 | 1654 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1655 | return vport; |
1656 | } else | |
1657 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1658 | } |
1659 | ||
ed099e92 | 1660 | /* Called with RTNL lock. */ |
df2c07f4 | 1661 | static int change_vport(struct vport *vport, struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
064af421 | 1662 | { |
c19e6535 | 1663 | int err = 0; |
f613a0d7 | 1664 | |
df2c07f4 | 1665 | if (a[OVS_VPORT_ATTR_STATS]) |
f613a0d7 PS |
1666 | vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
1667 | ||
1668 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
df2c07f4 | 1669 | err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1670 | |
c19e6535 BP |
1671 | return err; |
1672 | } | |
1673 | ||
df2c07f4 | 1674 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1675 | { |
f0fef760 | 1676 | struct nlattr **a = info->attrs; |
df2c07f4 | 1677 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1678 | struct vport_parms parms; |
ed099e92 | 1679 | struct sk_buff *reply; |
c19e6535 | 1680 | struct vport *vport; |
c19e6535 | 1681 | struct datapath *dp; |
b0ec0f27 | 1682 | u32 port_no; |
c19e6535 | 1683 | int err; |
b0ec0f27 | 1684 | |
c19e6535 | 1685 | err = -EINVAL; |
df2c07f4 | 1686 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE]) |
f0fef760 BP |
1687 | goto exit; |
1688 | ||
df2c07f4 | 1689 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1690 | if (err) |
1691 | goto exit; | |
51d4d598 | 1692 | |
c19e6535 | 1693 | rtnl_lock(); |
df2c07f4 | 1694 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1695 | err = -ENODEV; |
1696 | if (!dp) | |
ed099e92 | 1697 | goto exit_unlock; |
c19e6535 | 1698 | |
df2c07f4 JP |
1699 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1700 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1701 | |
1702 | err = -EFBIG; | |
1703 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1704 | goto exit_unlock; |
c19e6535 BP |
1705 | |
1706 | vport = get_vport_protected(dp, port_no); | |
1707 | err = -EBUSY; | |
1708 | if (vport) | |
ed099e92 | 1709 | goto exit_unlock; |
c19e6535 BP |
1710 | } else { |
1711 | for (port_no = 1; ; port_no++) { | |
1712 | if (port_no >= DP_MAX_PORTS) { | |
1713 | err = -EFBIG; | |
ed099e92 | 1714 | goto exit_unlock; |
c19e6535 BP |
1715 | } |
1716 | vport = get_vport_protected(dp, port_no); | |
1717 | if (!vport) | |
1718 | break; | |
51d4d598 | 1719 | } |
064af421 | 1720 | } |
b0ec0f27 | 1721 | |
df2c07f4 JP |
1722 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1723 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1724 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1725 | parms.dp = dp; |
1726 | parms.port_no = port_no; | |
1727 | ||
1728 | vport = new_vport(&parms); | |
1729 | err = PTR_ERR(vport); | |
1730 | if (IS_ERR(vport)) | |
ed099e92 | 1731 | goto exit_unlock; |
c19e6535 | 1732 | |
c19e6535 BP |
1733 | dp_sysfs_add_if(vport); |
1734 | ||
1735 | err = change_vport(vport, a); | |
f0fef760 | 1736 | if (!err) { |
df2c07f4 JP |
1737 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
1738 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1739 | if (IS_ERR(reply)) |
1740 | err = PTR_ERR(reply); | |
1741 | } | |
c19e6535 BP |
1742 | if (err) { |
1743 | dp_detach_port(vport); | |
ed099e92 | 1744 | goto exit_unlock; |
c19e6535 | 1745 | } |
f0fef760 BP |
1746 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1747 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
c19e6535 | 1748 | |
c19e6535 | 1749 | |
ed099e92 | 1750 | exit_unlock: |
c19e6535 | 1751 | rtnl_unlock(); |
c19e6535 BP |
1752 | exit: |
1753 | return err; | |
44e05eca BP |
1754 | } |
1755 | ||
df2c07f4 | 1756 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1757 | { |
f0fef760 BP |
1758 | struct nlattr **a = info->attrs; |
1759 | struct sk_buff *reply; | |
c19e6535 | 1760 | struct vport *vport; |
c19e6535 | 1761 | int err; |
44e05eca | 1762 | |
df2c07f4 | 1763 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1764 | if (err) |
c19e6535 BP |
1765 | goto exit; |
1766 | ||
1767 | rtnl_lock(); | |
f0fef760 | 1768 | vport = lookup_vport(info->userhdr, a); |
c19e6535 BP |
1769 | err = PTR_ERR(vport); |
1770 | if (IS_ERR(vport)) | |
f0fef760 | 1771 | goto exit_unlock; |
44e05eca | 1772 | |
c19e6535 | 1773 | err = 0; |
df2c07f4 JP |
1774 | if (a[OVS_VPORT_ATTR_OPTIONS]) |
1775 | err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); | |
c19e6535 BP |
1776 | if (!err) |
1777 | err = change_vport(vport, a); | |
1778 | ||
df2c07f4 JP |
1779 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1780 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1781 | if (IS_ERR(reply)) { |
1782 | err = PTR_ERR(reply); | |
1783 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1784 | dp_vport_multicast_group.id, err); | |
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1789 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1790 | ||
1791 | exit_unlock: | |
c19e6535 BP |
1792 | rtnl_unlock(); |
1793 | exit: | |
1794 | return err; | |
064af421 BP |
1795 | } |
1796 | ||
df2c07f4 | 1797 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1798 | { |
f0fef760 BP |
1799 | struct nlattr **a = info->attrs; |
1800 | struct sk_buff *reply; | |
c19e6535 | 1801 | struct vport *vport; |
c19e6535 BP |
1802 | int err; |
1803 | ||
df2c07f4 | 1804 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1805 | if (err) |
c19e6535 BP |
1806 | goto exit; |
1807 | ||
1808 | rtnl_lock(); | |
f0fef760 | 1809 | vport = lookup_vport(info->userhdr, a); |
c19e6535 | 1810 | err = PTR_ERR(vport); |
f0fef760 BP |
1811 | if (IS_ERR(vport)) |
1812 | goto exit_unlock; | |
c19e6535 | 1813 | |
df2c07f4 | 1814 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1815 | err = -EINVAL; |
1816 | goto exit_unlock; | |
1817 | } | |
1818 | ||
df2c07f4 JP |
1819 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1820 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1821 | err = PTR_ERR(reply); |
1822 | if (IS_ERR(reply)) | |
1823 | goto exit_unlock; | |
1824 | ||
3544358a | 1825 | dp_detach_port(vport); |
f0fef760 BP |
1826 | |
1827 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1828 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1829 | ||
1830 | exit_unlock: | |
c19e6535 BP |
1831 | rtnl_unlock(); |
1832 | exit: | |
1833 | return err; | |
7c40efc9 BP |
1834 | } |
1835 | ||
df2c07f4 | 1836 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1837 | { |
f0fef760 | 1838 | struct nlattr **a = info->attrs; |
df2c07f4 | 1839 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1840 | struct sk_buff *reply; |
c19e6535 | 1841 | struct vport *vport; |
c19e6535 BP |
1842 | int err; |
1843 | ||
df2c07f4 | 1844 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1845 | if (err) |
1846 | goto exit; | |
c19e6535 | 1847 | |
ed099e92 | 1848 | rcu_read_lock(); |
df2c07f4 | 1849 | vport = lookup_vport(ovs_header, a); |
c19e6535 BP |
1850 | err = PTR_ERR(vport); |
1851 | if (IS_ERR(vport)) | |
f0fef760 | 1852 | goto exit_unlock; |
c19e6535 | 1853 | |
df2c07f4 JP |
1854 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1855 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1856 | err = PTR_ERR(reply); |
1857 | if (IS_ERR(reply)) | |
f0fef760 | 1858 | goto exit_unlock; |
ed099e92 | 1859 | |
df2fa9b5 JG |
1860 | rcu_read_unlock(); |
1861 | ||
1862 | return genlmsg_reply(reply, info); | |
ed099e92 | 1863 | |
f0fef760 | 1864 | exit_unlock: |
ed099e92 | 1865 | rcu_read_unlock(); |
f0fef760 | 1866 | exit: |
c19e6535 BP |
1867 | return err; |
1868 | } | |
1869 | ||
df2c07f4 | 1870 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1871 | { |
df2c07f4 | 1872 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 BP |
1873 | struct datapath *dp; |
1874 | u32 port_no; | |
f0fef760 | 1875 | int retval; |
c19e6535 | 1876 | |
df2c07f4 | 1877 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 | 1878 | if (!dp) |
f0fef760 | 1879 | return -ENODEV; |
ed099e92 BP |
1880 | |
1881 | rcu_read_lock(); | |
f0fef760 | 1882 | for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) { |
ed099e92 | 1883 | struct vport *vport; |
ed099e92 BP |
1884 | |
1885 | vport = get_vport_protected(dp, port_no); | |
1886 | if (!vport) | |
1887 | continue; | |
1888 | ||
df2c07f4 | 1889 | if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid, |
f0fef760 | 1890 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1891 | OVS_VPORT_CMD_NEW) < 0) |
f0fef760 | 1892 | break; |
c19e6535 | 1893 | } |
ed099e92 | 1894 | rcu_read_unlock(); |
c19e6535 | 1895 | |
f0fef760 BP |
1896 | cb->args[0] = port_no; |
1897 | retval = skb->len; | |
1898 | ||
1899 | return retval; | |
7c40efc9 BP |
1900 | } |
1901 | ||
f0fef760 | 1902 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1903 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1904 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1905 | .policy = vport_policy, | |
df2c07f4 | 1906 | .doit = ovs_vport_cmd_new |
f0fef760 | 1907 | }, |
df2c07f4 | 1908 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1909 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1910 | .policy = vport_policy, | |
df2c07f4 | 1911 | .doit = ovs_vport_cmd_del |
f0fef760 | 1912 | }, |
df2c07f4 | 1913 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1914 | .flags = 0, /* OK for unprivileged users. */ |
1915 | .policy = vport_policy, | |
df2c07f4 JP |
1916 | .doit = ovs_vport_cmd_get, |
1917 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1918 | }, |
df2c07f4 | 1919 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1920 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1921 | .policy = vport_policy, | |
df2c07f4 | 1922 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1923 | }, |
1924 | }; | |
1925 | ||
982b8810 BP |
1926 | struct genl_family_and_ops { |
1927 | struct genl_family *family; | |
1928 | struct genl_ops *ops; | |
1929 | int n_ops; | |
1930 | struct genl_multicast_group *group; | |
1931 | }; | |
ed099e92 | 1932 | |
982b8810 | 1933 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1934 | { &dp_datapath_genl_family, |
1935 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1936 | &dp_datapath_multicast_group }, | |
f0fef760 BP |
1937 | { &dp_vport_genl_family, |
1938 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1939 | &dp_vport_multicast_group }, | |
37a1300c BP |
1940 | { &dp_flow_genl_family, |
1941 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1942 | &dp_flow_multicast_group }, | |
982b8810 BP |
1943 | { &dp_packet_genl_family, |
1944 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1945 | NULL }, | |
1946 | }; | |
ed099e92 | 1947 | |
982b8810 BP |
1948 | static void dp_unregister_genl(int n_families) |
1949 | { | |
1950 | int i; | |
ed099e92 | 1951 | |
b867ca75 | 1952 | for (i = 0; i < n_families; i++) |
982b8810 | 1953 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
1954 | } |
1955 | ||
982b8810 | 1956 | static int dp_register_genl(void) |
064af421 | 1957 | { |
982b8810 BP |
1958 | int n_registered; |
1959 | int err; | |
1960 | int i; | |
064af421 | 1961 | |
982b8810 BP |
1962 | n_registered = 0; |
1963 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
1964 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 1965 | |
982b8810 BP |
1966 | err = genl_register_family_with_ops(f->family, f->ops, |
1967 | f->n_ops); | |
1968 | if (err) | |
1969 | goto error; | |
1970 | n_registered++; | |
e22d4953 | 1971 | |
982b8810 BP |
1972 | if (f->group) { |
1973 | err = genl_register_mc_group(f->family, f->group); | |
1974 | if (err) | |
1975 | goto error; | |
1976 | } | |
1977 | } | |
9cc8b4e4 | 1978 | |
982b8810 BP |
1979 | err = packet_register_mc_groups(); |
1980 | if (err) | |
1981 | goto error; | |
1982 | return 0; | |
064af421 BP |
1983 | |
1984 | error: | |
982b8810 BP |
1985 | dp_unregister_genl(n_registered); |
1986 | return err; | |
064af421 BP |
1987 | } |
1988 | ||
22d24ebf BP |
1989 | static int __init dp_init(void) |
1990 | { | |
f2459fe7 | 1991 | struct sk_buff *dummy_skb; |
22d24ebf BP |
1992 | int err; |
1993 | ||
f2459fe7 | 1994 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 1995 | |
f2459fe7 | 1996 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 | 1997 | |
3544358a | 1998 | err = tnl_init(); |
064af421 BP |
1999 | if (err) |
2000 | goto error; | |
2001 | ||
3544358a PS |
2002 | err = flow_init(); |
2003 | if (err) | |
2004 | goto error_tnl_exit; | |
2005 | ||
f2459fe7 | 2006 | err = vport_init(); |
064af421 BP |
2007 | if (err) |
2008 | goto error_flow_exit; | |
2009 | ||
f2459fe7 JG |
2010 | err = register_netdevice_notifier(&dp_device_notifier); |
2011 | if (err) | |
2012 | goto error_vport_exit; | |
2013 | ||
982b8810 BP |
2014 | err = dp_register_genl(); |
2015 | if (err < 0) | |
37a1300c | 2016 | goto error_unreg_notifier; |
982b8810 | 2017 | |
064af421 BP |
2018 | return 0; |
2019 | ||
2020 | error_unreg_notifier: | |
2021 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2022 | error_vport_exit: |
2023 | vport_exit(); | |
064af421 BP |
2024 | error_flow_exit: |
2025 | flow_exit(); | |
3544358a PS |
2026 | error_tnl_exit: |
2027 | tnl_exit(); | |
064af421 BP |
2028 | error: |
2029 | return err; | |
2030 | } | |
2031 | ||
2032 | static void dp_cleanup(void) | |
2033 | { | |
2034 | rcu_barrier(); | |
982b8810 | 2035 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
064af421 | 2036 | unregister_netdevice_notifier(&dp_device_notifier); |
f2459fe7 | 2037 | vport_exit(); |
064af421 | 2038 | flow_exit(); |
3544358a | 2039 | tnl_exit(); |
064af421 BP |
2040 | } |
2041 | ||
2042 | module_init(dp_init); | |
2043 | module_exit(dp_cleanup); | |
2044 | ||
2045 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2046 | MODULE_LICENSE("GPL"); |