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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 *); |
b063d9f0 | 87 | static int queue_userspace_packets(struct datapath *, u32 pid, 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 | 312 | upcall.key = &key; |
856081f6 | 313 | dp_upcall(dp, skb, &upcall); |
36ce148c | 314 | kfree_skb(skb); |
3976f6d5 JG |
315 | stats_counter_off = offsetof(struct dp_stats_percpu, n_missed); |
316 | goto out; | |
317 | } | |
318 | ||
3544358a | 319 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
320 | } |
321 | ||
f267de8a | 322 | stats_counter_off = offsetof(struct dp_stats_percpu, n_hit); |
3976f6d5 | 323 | flow_used(OVS_CB(skb)->flow, skb); |
a4af2475 | 324 | execute_actions(dp, skb); |
55574bb0 | 325 | |
8819fac7 | 326 | out: |
55574bb0 | 327 | /* Update datapath statistics. */ |
8819fac7 JG |
328 | local_bh_disable(); |
329 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
38c6ecbc JG |
330 | |
331 | write_seqcount_begin(&stats->seqlock); | |
8819fac7 | 332 | (*(u64 *)((u8 *)stats + stats_counter_off))++; |
38c6ecbc JG |
333 | write_seqcount_end(&stats->seqlock); |
334 | ||
8819fac7 | 335 | local_bh_enable(); |
064af421 BP |
336 | } |
337 | ||
856081f6 BP |
338 | static void copy_and_csum_skb(struct sk_buff *skb, void *to) |
339 | { | |
340 | u16 csum_start, csum_offset; | |
341 | __wsum csum; | |
342 | ||
343 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
344 | csum_start -= skb_headroom(skb); | |
856081f6 BP |
345 | |
346 | skb_copy_bits(skb, 0, to, csum_start); | |
347 | ||
348 | csum = skb_copy_and_csum_bits(skb, csum_start, to + csum_start, | |
349 | skb->len - csum_start, 0); | |
350 | *(__sum16 *)(to + csum_start + csum_offset) = csum_fold(csum); | |
351 | } | |
352 | ||
aa5a8fdc JG |
353 | static struct genl_family dp_packet_genl_family = { |
354 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
355 | .hdrsize = sizeof(struct ovs_header), |
356 | .name = OVS_PACKET_FAMILY, | |
aa5a8fdc | 357 | .version = 1, |
df2c07f4 | 358 | .maxattr = OVS_PACKET_ATTR_MAX |
aa5a8fdc JG |
359 | }; |
360 | ||
36ce148c PS |
361 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, |
362 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc | 363 | { |
36ce148c | 364 | struct sk_buff *segs = NULL; |
aa5a8fdc | 365 | struct dp_stats_percpu *stats; |
b063d9f0 | 366 | u32 pid; |
aa5a8fdc JG |
367 | int err; |
368 | ||
b063d9f0 JG |
369 | if (OVS_CB(skb)->flow) |
370 | pid = OVS_CB(skb)->flow->upcall_pid; | |
371 | else | |
372 | pid = OVS_CB(skb)->vport->upcall_pid; | |
373 | ||
374 | if (pid == 0) { | |
375 | err = -ENOTCONN; | |
b063d9f0 JG |
376 | goto err; |
377 | } | |
378 | ||
c3729ee4 | 379 | forward_ip_summed(skb, true); |
aa5a8fdc JG |
380 | |
381 | /* Break apart GSO packets into their component pieces. Otherwise | |
382 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
383 | if (skb_is_gso(skb)) { | |
36ce148c | 384 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
aa5a8fdc | 385 | |
36ce148c PS |
386 | if (IS_ERR(segs)) { |
387 | err = PTR_ERR(segs); | |
aa5a8fdc JG |
388 | goto err; |
389 | } | |
36ce148c | 390 | skb = segs; |
aa5a8fdc JG |
391 | } |
392 | ||
b063d9f0 | 393 | err = queue_userspace_packets(dp, pid, skb, upcall_info); |
36ce148c PS |
394 | if (segs) { |
395 | struct sk_buff *next; | |
396 | /* Free GSO-segments */ | |
397 | do { | |
398 | next = segs->next; | |
399 | kfree_skb(segs); | |
400 | } while ((segs = next) != NULL); | |
401 | } | |
402 | ||
d76195db JG |
403 | if (err) |
404 | goto err; | |
405 | ||
406 | return 0; | |
aa5a8fdc | 407 | |
aa5a8fdc JG |
408 | err: |
409 | local_bh_disable(); | |
410 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); | |
411 | ||
412 | write_seqcount_begin(&stats->seqlock); | |
413 | stats->n_lost++; | |
414 | write_seqcount_end(&stats->seqlock); | |
415 | ||
416 | local_bh_enable(); | |
417 | ||
418 | return err; | |
982b8810 BP |
419 | } |
420 | ||
421 | /* Send each packet in the 'skb' list to userspace for 'dp' as directed by | |
422 | * 'upcall_info'. There will be only one packet unless we broke up a GSO | |
423 | * packet. | |
424 | */ | |
b063d9f0 JG |
425 | static int queue_userspace_packets(struct datapath *dp, u32 pid, |
426 | struct sk_buff *skb, | |
427 | const struct dp_upcall_info *upcall_info) | |
cb5087ca | 428 | { |
99769a40 | 429 | int dp_ifindex; |
cb5087ca | 430 | |
99769a40 | 431 | dp_ifindex = get_dpifindex(dp); |
36ce148c PS |
432 | if (!dp_ifindex) |
433 | return -ENODEV; | |
99769a40 | 434 | |
cb5087ca | 435 | do { |
df2c07f4 | 436 | struct ovs_header *upcall; |
856081f6 BP |
437 | struct sk_buff *user_skb; /* to be queued to userspace */ |
438 | struct nlattr *nla; | |
439 | unsigned int len; | |
36ce148c | 440 | int err; |
cb5087ca | 441 | |
303708cc JG |
442 | err = vlan_deaccel_tag(skb); |
443 | if (unlikely(err)) | |
36ce148c | 444 | return err; |
6ce39213 | 445 | |
36ce148c PS |
446 | if (nla_attr_size(skb->len) > USHRT_MAX) |
447 | return -EFBIG; | |
51313015 | 448 | |
df2c07f4 | 449 | len = sizeof(struct ovs_header); |
856081f6 BP |
450 | len += nla_total_size(skb->len); |
451 | len += nla_total_size(FLOW_BUFSIZE); | |
6ff686f2 | 452 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) |
856081f6 | 453 | len += nla_total_size(8); |
856081f6 | 454 | |
982b8810 | 455 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
36ce148c PS |
456 | if (!user_skb) |
457 | return -ENOMEM; | |
cb5087ca | 458 | |
36ce148c PS |
459 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, |
460 | 0, upcall_info->cmd); | |
99769a40 | 461 | upcall->dp_ifindex = dp_ifindex; |
856081f6 | 462 | |
df2c07f4 | 463 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); |
856081f6 BP |
464 | flow_to_nlattrs(upcall_info->key, user_skb); |
465 | nla_nest_end(user_skb, nla); | |
cb5087ca | 466 | |
6ff686f2 PS |
467 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) |
468 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, | |
469 | upcall_info->userdata); | |
856081f6 | 470 | |
df2c07f4 | 471 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); |
856081f6 BP |
472 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
473 | copy_and_csum_skb(skb, nla_data(nla)); | |
474 | else | |
475 | skb_copy_bits(skb, 0, nla_data(nla), skb->len); | |
476 | ||
b063d9f0 | 477 | err = genlmsg_unicast(&init_net, user_skb, pid); |
982b8810 | 478 | if (err) |
36ce148c | 479 | return err; |
856081f6 | 480 | |
36ce148c | 481 | } while ((skb = skb->next)); |
cb5087ca | 482 | |
36ce148c | 483 | return 0; |
cb5087ca BP |
484 | } |
485 | ||
ed099e92 | 486 | /* Called with genl_mutex. */ |
254f2dc8 | 487 | static int flush_flows(int dp_ifindex) |
064af421 | 488 | { |
3544358a PS |
489 | struct flow_table *old_table; |
490 | struct flow_table *new_table; | |
9c52546b | 491 | struct datapath *dp; |
9c52546b | 492 | |
254f2dc8 | 493 | dp = get_dp(dp_ifindex); |
9c52546b | 494 | if (!dp) |
ed099e92 | 495 | return -ENODEV; |
8d5ebd83 | 496 | |
9c52546b | 497 | old_table = get_table_protected(dp); |
3544358a | 498 | new_table = flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 499 | if (!new_table) |
ed099e92 | 500 | return -ENOMEM; |
8d5ebd83 JG |
501 | |
502 | rcu_assign_pointer(dp->table, new_table); | |
503 | ||
3544358a | 504 | flow_tbl_deferred_destroy(old_table); |
ed099e92 | 505 | return 0; |
064af421 BP |
506 | } |
507 | ||
6ff686f2 PS |
508 | static int validate_actions(const struct nlattr *attr, int depth); |
509 | ||
510 | static int validate_sample(const struct nlattr *attr, int depth) | |
511 | { | |
512 | static const struct nla_policy sample_policy[OVS_SAMPLE_ATTR_MAX + 1] = | |
513 | { | |
514 | [OVS_SAMPLE_ATTR_PROBABILITY] = {.type = NLA_U32 }, | |
515 | [OVS_SAMPLE_ATTR_ACTIONS] = {.type = NLA_UNSPEC }, | |
516 | }; | |
517 | struct nlattr *a[OVS_SAMPLE_ATTR_MAX + 1]; | |
518 | int error; | |
519 | ||
520 | error = nla_parse_nested(a, OVS_SAMPLE_ATTR_MAX, attr, sample_policy); | |
521 | if (error) | |
522 | return error; | |
523 | ||
524 | if (!a[OVS_SAMPLE_ATTR_PROBABILITY]) | |
525 | return -EINVAL; | |
526 | if (!a[OVS_SAMPLE_ATTR_ACTIONS]) | |
527 | return -EINVAL; | |
528 | ||
529 | return validate_actions(a[OVS_SAMPLE_ATTR_ACTIONS], (depth + 1)); | |
530 | } | |
531 | ||
532 | static int validate_actions(const struct nlattr *attr, int depth) | |
064af421 | 533 | { |
23cad98c | 534 | const struct nlattr *a; |
6ff686f2 PS |
535 | int rem, err; |
536 | ||
537 | if (depth >= SAMPLE_ACTION_DEPTH) | |
538 | return -EOVERFLOW; | |
23cad98c | 539 | |
37a1300c | 540 | nla_for_each_nested(a, attr, rem) { |
df2c07f4 JP |
541 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
542 | [OVS_ACTION_ATTR_OUTPUT] = 4, | |
543 | [OVS_ACTION_ATTR_USERSPACE] = 8, | |
d9065a90 PS |
544 | [OVS_ACTION_ATTR_PUSH_VLAN] = 2, |
545 | [OVS_ACTION_ATTR_POP_VLAN] = 0, | |
df2c07f4 JP |
546 | [OVS_ACTION_ATTR_SET_DL_SRC] = ETH_ALEN, |
547 | [OVS_ACTION_ATTR_SET_DL_DST] = ETH_ALEN, | |
548 | [OVS_ACTION_ATTR_SET_NW_SRC] = 4, | |
549 | [OVS_ACTION_ATTR_SET_NW_DST] = 4, | |
550 | [OVS_ACTION_ATTR_SET_NW_TOS] = 1, | |
551 | [OVS_ACTION_ATTR_SET_TP_SRC] = 2, | |
552 | [OVS_ACTION_ATTR_SET_TP_DST] = 2, | |
553 | [OVS_ACTION_ATTR_SET_TUNNEL] = 8, | |
554 | [OVS_ACTION_ATTR_SET_PRIORITY] = 4, | |
555 | [OVS_ACTION_ATTR_POP_PRIORITY] = 0, | |
23cad98c BP |
556 | }; |
557 | int type = nla_type(a); | |
558 | ||
6ff686f2 PS |
559 | /* Match expected attr len for given attr len except for |
560 | * OVS_ACTION_ATTR_SAMPLE, as it has nested actions list which | |
561 | * is variable size. */ | |
562 | if (type > OVS_ACTION_ATTR_MAX || | |
563 | (nla_len(a) != action_lens[type] && | |
564 | type != OVS_ACTION_ATTR_SAMPLE)) | |
23cad98c BP |
565 | return -EINVAL; |
566 | ||
567 | switch (type) { | |
df2c07f4 | 568 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 569 | return -EINVAL; |
064af421 | 570 | |
df2c07f4 | 571 | case OVS_ACTION_ATTR_USERSPACE: |
d9065a90 | 572 | case OVS_ACTION_ATTR_POP_VLAN: |
df2c07f4 JP |
573 | case OVS_ACTION_ATTR_SET_DL_SRC: |
574 | case OVS_ACTION_ATTR_SET_DL_DST: | |
575 | case OVS_ACTION_ATTR_SET_NW_SRC: | |
576 | case OVS_ACTION_ATTR_SET_NW_DST: | |
577 | case OVS_ACTION_ATTR_SET_TP_SRC: | |
578 | case OVS_ACTION_ATTR_SET_TP_DST: | |
579 | case OVS_ACTION_ATTR_SET_TUNNEL: | |
580 | case OVS_ACTION_ATTR_SET_PRIORITY: | |
581 | case OVS_ACTION_ATTR_POP_PRIORITY: | |
23cad98c BP |
582 | /* No validation needed. */ |
583 | break; | |
584 | ||
df2c07f4 | 585 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
586 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
587 | return -EINVAL; | |
3b1fc5f3 | 588 | break; |
cdee00fd | 589 | |
d9065a90 | 590 | case OVS_ACTION_ATTR_PUSH_VLAN: |
cdee00fd | 591 | if (nla_get_be16(a) & htons(VLAN_CFI_MASK)) |
064af421 | 592 | return -EINVAL; |
23cad98c | 593 | break; |
064af421 | 594 | |
df2c07f4 | 595 | case OVS_ACTION_ATTR_SET_NW_TOS: |
23cad98c BP |
596 | if (nla_get_u8(a) & INET_ECN_MASK) |
597 | return -EINVAL; | |
598 | break; | |
064af421 | 599 | |
6ff686f2 PS |
600 | case OVS_ACTION_ATTR_SAMPLE: |
601 | err = validate_sample(a, depth); | |
602 | if (err) | |
603 | return err; | |
604 | break; | |
605 | ||
23cad98c BP |
606 | default: |
607 | return -EOPNOTSUPP; | |
608 | } | |
609 | } | |
3c5f6de3 | 610 | |
23cad98c BP |
611 | if (rem > 0) |
612 | return -EINVAL; | |
064af421 | 613 | |
23cad98c | 614 | return 0; |
064af421 | 615 | } |
064af421 BP |
616 | static void clear_stats(struct sw_flow *flow) |
617 | { | |
6bfafa55 | 618 | flow->used = 0; |
064af421 | 619 | flow->tcp_flags = 0; |
064af421 BP |
620 | flow->packet_count = 0; |
621 | flow->byte_count = 0; | |
622 | } | |
623 | ||
df2c07f4 | 624 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 625 | { |
df2c07f4 | 626 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 627 | struct nlattr **a = info->attrs; |
e0e57990 | 628 | struct sw_flow_actions *acts; |
982b8810 | 629 | struct sk_buff *packet; |
e0e57990 | 630 | struct sw_flow *flow; |
f7cd0081 | 631 | struct datapath *dp; |
d6569377 BP |
632 | struct ethhdr *eth; |
633 | bool is_frag; | |
3f19d399 | 634 | int len; |
d6569377 | 635 | int err; |
76abe283 | 636 | int key_len; |
064af421 | 637 | |
f7cd0081 | 638 | err = -EINVAL; |
df2c07f4 JP |
639 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
640 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
641 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 642 | goto err; |
064af421 | 643 | |
6ff686f2 | 644 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], 0); |
f7cd0081 | 645 | if (err) |
e5cad958 | 646 | goto err; |
f7cd0081 | 647 | |
df2c07f4 | 648 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 649 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
650 | err = -ENOMEM; |
651 | if (!packet) | |
e5cad958 | 652 | goto err; |
3f19d399 BP |
653 | skb_reserve(packet, NET_IP_ALIGN); |
654 | ||
df2c07f4 | 655 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 656 | |
f7cd0081 BP |
657 | skb_reset_mac_header(packet); |
658 | eth = eth_hdr(packet); | |
064af421 | 659 | |
d6569377 BP |
660 | /* Normally, setting the skb 'protocol' field would be handled by a |
661 | * call to eth_type_trans(), but it assumes there's a sending | |
662 | * device, which we may not have. */ | |
663 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 664 | packet->protocol = eth->h_proto; |
d6569377 | 665 | else |
f7cd0081 | 666 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 667 | |
e0e57990 BP |
668 | /* Build an sw_flow for sending this packet. */ |
669 | flow = flow_alloc(); | |
670 | err = PTR_ERR(flow); | |
671 | if (IS_ERR(flow)) | |
e5cad958 | 672 | goto err_kfree_skb; |
064af421 | 673 | |
76abe283 | 674 | err = flow_extract(packet, -1, &flow->key, &key_len, &is_frag); |
e0e57990 BP |
675 | if (err) |
676 | goto err_flow_put; | |
e0e57990 | 677 | |
80e5eed9 BP |
678 | err = flow_metadata_from_nlattrs(&flow->key.eth.in_port, |
679 | &flow->key.eth.tun_id, | |
df2c07f4 | 680 | a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
681 | if (err) |
682 | goto err_flow_put; | |
683 | ||
3544358a | 684 | flow->hash = flow_hash(&flow->key, key_len); |
0fe255df | 685 | |
b063d9f0 JG |
686 | if (a[OVS_PACKET_ATTR_UPCALL_PID]) |
687 | flow->upcall_pid = nla_get_u32(a[OVS_PACKET_ATTR_UPCALL_PID]); | |
688 | else | |
689 | flow->upcall_pid = NETLINK_CB(skb).pid; | |
690 | ||
df2c07f4 | 691 | acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
692 | err = PTR_ERR(acts); |
693 | if (IS_ERR(acts)) | |
694 | goto err_flow_put; | |
695 | rcu_assign_pointer(flow->sf_acts, acts); | |
696 | ||
697 | OVS_CB(packet)->flow = flow; | |
698 | ||
d6569377 | 699 | rcu_read_lock(); |
df2c07f4 | 700 | dp = get_dp(ovs_header->dp_ifindex); |
f7cd0081 | 701 | err = -ENODEV; |
e5cad958 BP |
702 | if (!dp) |
703 | goto err_unlock; | |
cc4015df JG |
704 | |
705 | if (flow->key.eth.in_port < DP_MAX_PORTS) | |
706 | OVS_CB(packet)->vport = get_vport_protected(dp, | |
707 | flow->key.eth.in_port); | |
708 | ||
a4af2475 | 709 | err = execute_actions(dp, packet); |
d6569377 | 710 | rcu_read_unlock(); |
e0e57990 BP |
711 | |
712 | flow_put(flow); | |
e5cad958 | 713 | return err; |
064af421 | 714 | |
e5cad958 BP |
715 | err_unlock: |
716 | rcu_read_unlock(); | |
e0e57990 BP |
717 | err_flow_put: |
718 | flow_put(flow); | |
e5cad958 BP |
719 | err_kfree_skb: |
720 | kfree_skb(packet); | |
721 | err: | |
d6569377 | 722 | return err; |
064af421 BP |
723 | } |
724 | ||
df2c07f4 JP |
725 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
726 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
727 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
728 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
b063d9f0 | 729 | [OVS_PACKET_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
982b8810 BP |
730 | }; |
731 | ||
732 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 733 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
734 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
735 | .policy = packet_policy, | |
df2c07f4 | 736 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
737 | } |
738 | }; | |
739 | ||
df2c07f4 | 740 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 741 | { |
d6569377 | 742 | int i; |
3544358a | 743 | struct flow_table *table = get_table_protected(dp); |
f180c2e2 | 744 | |
3544358a | 745 | stats->n_flows = flow_tbl_count(table); |
064af421 | 746 | |
d6569377 BP |
747 | stats->n_frags = stats->n_hit = stats->n_missed = stats->n_lost = 0; |
748 | for_each_possible_cpu(i) { | |
749 | const struct dp_stats_percpu *percpu_stats; | |
750 | struct dp_stats_percpu local_stats; | |
751 | unsigned seqcount; | |
44e05eca | 752 | |
d6569377 | 753 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 754 | |
d6569377 BP |
755 | do { |
756 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
757 | local_stats = *percpu_stats; | |
758 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
064af421 | 759 | |
d6569377 BP |
760 | stats->n_frags += local_stats.n_frags; |
761 | stats->n_hit += local_stats.n_hit; | |
762 | stats->n_missed += local_stats.n_missed; | |
763 | stats->n_lost += local_stats.n_lost; | |
764 | } | |
765 | } | |
064af421 | 766 | |
df2c07f4 JP |
767 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
768 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
b063d9f0 | 769 | [OVS_FLOW_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 JP |
770 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, |
771 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 772 | }; |
36956a7d | 773 | |
37a1300c BP |
774 | static struct genl_family dp_flow_genl_family = { |
775 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
776 | .hdrsize = sizeof(struct ovs_header), |
777 | .name = OVS_FLOW_FAMILY, | |
37a1300c | 778 | .version = 1, |
df2c07f4 | 779 | .maxattr = OVS_FLOW_ATTR_MAX |
37a1300c | 780 | }; |
ed099e92 | 781 | |
37a1300c | 782 | static struct genl_multicast_group dp_flow_multicast_group = { |
df2c07f4 | 783 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
784 | }; |
785 | ||
786 | /* Called with genl_lock. */ | |
df2c07f4 | 787 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c | 788 | struct sk_buff *skb, u32 pid, u32 seq, u32 flags, u8 cmd) |
d6569377 | 789 | { |
37a1300c | 790 | const int skb_orig_len = skb->len; |
d6569377 | 791 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
792 | struct ovs_flow_stats stats; |
793 | struct ovs_header *ovs_header; | |
d6569377 BP |
794 | struct nlattr *nla; |
795 | unsigned long used; | |
796 | u8 tcp_flags; | |
797 | int err; | |
064af421 | 798 | |
d6569377 | 799 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 800 | lockdep_genl_is_held()); |
064af421 | 801 | |
df2c07f4 JP |
802 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
803 | if (!ovs_header) | |
37a1300c | 804 | return -EMSGSIZE; |
d6569377 | 805 | |
99769a40 | 806 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 807 | |
df2c07f4 | 808 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
809 | if (!nla) |
810 | goto nla_put_failure; | |
811 | err = flow_to_nlattrs(&flow->key, skb); | |
812 | if (err) | |
37a1300c | 813 | goto error; |
d6569377 BP |
814 | nla_nest_end(skb, nla); |
815 | ||
b063d9f0 JG |
816 | NLA_PUT_U32(skb, OVS_FLOW_ATTR_UPCALL_PID, flow->upcall_pid); |
817 | ||
d6569377 BP |
818 | spin_lock_bh(&flow->lock); |
819 | used = flow->used; | |
820 | stats.n_packets = flow->packet_count; | |
821 | stats.n_bytes = flow->byte_count; | |
822 | tcp_flags = flow->tcp_flags; | |
823 | spin_unlock_bh(&flow->lock); | |
824 | ||
825 | if (used) | |
df2c07f4 | 826 | NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used)); |
d6569377 BP |
827 | |
828 | if (stats.n_packets) | |
df2c07f4 | 829 | NLA_PUT(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats); |
d6569377 BP |
830 | |
831 | if (tcp_flags) | |
df2c07f4 | 832 | NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags); |
d6569377 | 833 | |
df2c07f4 | 834 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
835 | * this is the first flow to be dumped into 'skb'. This is unusual for |
836 | * Netlink but individual action lists can be longer than | |
837 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
838 | * The userspace caller can always fetch the actions separately if it | |
839 | * really wants them. (Most userspace callers in fact don't care.) | |
840 | * | |
841 | * This can only fail for dump operations because the skb is always | |
842 | * properly sized for single flows. | |
843 | */ | |
df2c07f4 | 844 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
845 | sf_acts->actions); |
846 | if (err < 0 && skb_orig_len) | |
847 | goto error; | |
37a1300c | 848 | |
df2c07f4 | 849 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
850 | |
851 | nla_put_failure: | |
852 | err = -EMSGSIZE; | |
37a1300c | 853 | error: |
df2c07f4 | 854 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 855 | return err; |
44e05eca BP |
856 | } |
857 | ||
df2c07f4 | 858 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 859 | { |
37a1300c BP |
860 | const struct sw_flow_actions *sf_acts; |
861 | int len; | |
d6569377 | 862 | |
37a1300c BP |
863 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
864 | lockdep_genl_is_held()); | |
d6569377 | 865 | |
df2c07f4 JP |
866 | len = nla_total_size(FLOW_BUFSIZE); /* OVS_FLOW_ATTR_KEY */ |
867 | len += nla_total_size(sf_acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
868 | len += nla_total_size(sizeof(struct ovs_flow_stats)); /* OVS_FLOW_ATTR_STATS */ | |
869 | len += nla_total_size(1); /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
870 | len += nla_total_size(8); /* OVS_FLOW_ATTR_USED */ | |
871 | return genlmsg_new(NLMSG_ALIGN(sizeof(struct ovs_header)) + len, GFP_KERNEL); | |
37a1300c | 872 | } |
8d5ebd83 | 873 | |
df2c07f4 | 874 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c BP |
875 | u32 pid, u32 seq, u8 cmd) |
876 | { | |
877 | struct sk_buff *skb; | |
878 | int retval; | |
d6569377 | 879 | |
df2c07f4 | 880 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
881 | if (!skb) |
882 | return ERR_PTR(-ENOMEM); | |
d6569377 | 883 | |
df2c07f4 | 884 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 885 | BUG_ON(retval < 0); |
d6569377 | 886 | return skb; |
064af421 BP |
887 | } |
888 | ||
df2c07f4 | 889 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 890 | { |
37a1300c | 891 | struct nlattr **a = info->attrs; |
df2c07f4 | 892 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 893 | struct sw_flow_key key; |
d6569377 | 894 | struct sw_flow *flow; |
37a1300c | 895 | struct sk_buff *reply; |
9c52546b | 896 | struct datapath *dp; |
3544358a | 897 | struct flow_table *table; |
bc4a05c6 | 898 | int error; |
76abe283 | 899 | int key_len; |
064af421 | 900 | |
37a1300c BP |
901 | /* Extract key. */ |
902 | error = -EINVAL; | |
df2c07f4 | 903 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 904 | goto error; |
df2c07f4 | 905 | error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
906 | if (error) |
907 | goto error; | |
064af421 | 908 | |
37a1300c | 909 | /* Validate actions. */ |
df2c07f4 | 910 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
6ff686f2 | 911 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], 0); |
37a1300c BP |
912 | if (error) |
913 | goto error; | |
df2c07f4 | 914 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
915 | error = -EINVAL; |
916 | goto error; | |
917 | } | |
918 | ||
df2c07f4 | 919 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 920 | error = -ENODEV; |
9c52546b | 921 | if (!dp) |
37a1300c | 922 | goto error; |
704a1e09 | 923 | |
d6569377 | 924 | table = get_table_protected(dp); |
3544358a PS |
925 | flow = flow_tbl_lookup(table, &key, key_len); |
926 | if (!flow) { | |
d6569377 BP |
927 | struct sw_flow_actions *acts; |
928 | ||
929 | /* Bail out if we're not allowed to create a new flow. */ | |
930 | error = -ENOENT; | |
df2c07f4 | 931 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 932 | goto error; |
d6569377 BP |
933 | |
934 | /* Expand table, if necessary, to make room. */ | |
3544358a PS |
935 | if (flow_tbl_need_to_expand(table)) { |
936 | struct flow_table *new_table; | |
937 | ||
938 | new_table = flow_tbl_expand(table); | |
939 | if (!IS_ERR(new_table)) { | |
940 | rcu_assign_pointer(dp->table, new_table); | |
941 | flow_tbl_deferred_destroy(table); | |
942 | table = get_table_protected(dp); | |
943 | } | |
d6569377 BP |
944 | } |
945 | ||
946 | /* Allocate flow. */ | |
947 | flow = flow_alloc(); | |
948 | if (IS_ERR(flow)) { | |
949 | error = PTR_ERR(flow); | |
37a1300c | 950 | goto error; |
d6569377 | 951 | } |
37a1300c | 952 | flow->key = key; |
d6569377 BP |
953 | clear_stats(flow); |
954 | ||
b063d9f0 JG |
955 | if (a[OVS_FLOW_ATTR_UPCALL_PID]) |
956 | flow->upcall_pid = nla_get_u32(a[OVS_FLOW_ATTR_UPCALL_PID]); | |
957 | else | |
958 | flow->upcall_pid = NETLINK_CB(skb).pid; | |
959 | ||
d6569377 | 960 | /* Obtain actions. */ |
df2c07f4 | 961 | acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
962 | error = PTR_ERR(acts); |
963 | if (IS_ERR(acts)) | |
964 | goto error_free_flow; | |
965 | rcu_assign_pointer(flow->sf_acts, acts); | |
966 | ||
d6569377 | 967 | /* Put flow in bucket. */ |
3544358a PS |
968 | flow->hash = flow_hash(&key, key_len); |
969 | flow_tbl_insert(table, flow); | |
37a1300c | 970 | |
df2c07f4 JP |
971 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
972 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 BP |
973 | } else { |
974 | /* We found a matching flow. */ | |
975 | struct sw_flow_actions *old_acts; | |
976 | ||
977 | /* Bail out if we're not allowed to modify an existing flow. | |
978 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
979 | * because Generic Netlink treats the latter as a dump | |
980 | * request. We also accept NLM_F_EXCL in case that bug ever | |
981 | * gets fixed. | |
982 | */ | |
983 | error = -EEXIST; | |
df2c07f4 | 984 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
985 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
986 | goto error; | |
d6569377 BP |
987 | |
988 | /* Update actions. */ | |
d6569377 | 989 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 990 | lockdep_genl_is_held()); |
df2c07f4 JP |
991 | if (a[OVS_FLOW_ATTR_ACTIONS] && |
992 | (old_acts->actions_len != nla_len(a[OVS_FLOW_ATTR_ACTIONS]) || | |
993 | memcmp(old_acts->actions, nla_data(a[OVS_FLOW_ATTR_ACTIONS]), | |
37a1300c | 994 | old_acts->actions_len))) { |
d6569377 BP |
995 | struct sw_flow_actions *new_acts; |
996 | ||
df2c07f4 | 997 | new_acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
998 | error = PTR_ERR(new_acts); |
999 | if (IS_ERR(new_acts)) | |
37a1300c | 1000 | goto error; |
d6569377 BP |
1001 | |
1002 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
1003 | flow_deferred_free_acts(old_acts); | |
1004 | } | |
1005 | ||
df2c07f4 JP |
1006 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1007 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 | 1008 | |
b063d9f0 JG |
1009 | if (a[OVS_FLOW_ATTR_UPCALL_PID]) |
1010 | flow->upcall_pid = nla_get_u32(a[OVS_FLOW_ATTR_UPCALL_PID]); | |
1011 | ||
d6569377 | 1012 | /* Clear stats. */ |
df2c07f4 | 1013 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1014 | spin_lock_bh(&flow->lock); |
1015 | clear_stats(flow); | |
1016 | spin_unlock_bh(&flow->lock); | |
1017 | } | |
9c52546b | 1018 | } |
37a1300c BP |
1019 | |
1020 | if (!IS_ERR(reply)) | |
1021 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1022 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1023 | else | |
1024 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1025 | dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1026 | return 0; |
704a1e09 | 1027 | |
d6569377 BP |
1028 | error_free_flow: |
1029 | flow_put(flow); | |
37a1300c | 1030 | error: |
9c52546b | 1031 | return error; |
704a1e09 BP |
1032 | } |
1033 | ||
df2c07f4 | 1034 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1035 | { |
37a1300c | 1036 | struct nlattr **a = info->attrs; |
df2c07f4 | 1037 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1038 | struct sw_flow_key key; |
37a1300c | 1039 | struct sk_buff *reply; |
704a1e09 | 1040 | struct sw_flow *flow; |
9c52546b | 1041 | struct datapath *dp; |
3544358a | 1042 | struct flow_table *table; |
9c52546b | 1043 | int err; |
76abe283 | 1044 | int key_len; |
704a1e09 | 1045 | |
df2c07f4 | 1046 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1047 | return -EINVAL; |
df2c07f4 | 1048 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1049 | if (err) |
1050 | return err; | |
704a1e09 | 1051 | |
df2c07f4 | 1052 | dp = get_dp(ovs_header->dp_ifindex); |
9c52546b | 1053 | if (!dp) |
ed099e92 | 1054 | return -ENODEV; |
704a1e09 | 1055 | |
9c52546b | 1056 | table = get_table_protected(dp); |
3544358a PS |
1057 | flow = flow_tbl_lookup(table, &key, key_len); |
1058 | if (!flow) | |
ed099e92 | 1059 | return -ENOENT; |
d6569377 | 1060 | |
df2c07f4 | 1061 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1062 | if (IS_ERR(reply)) |
1063 | return PTR_ERR(reply); | |
36956a7d | 1064 | |
37a1300c | 1065 | return genlmsg_reply(reply, info); |
d6569377 | 1066 | } |
9c52546b | 1067 | |
df2c07f4 | 1068 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1069 | { |
37a1300c | 1070 | struct nlattr **a = info->attrs; |
df2c07f4 | 1071 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1072 | struct sw_flow_key key; |
37a1300c | 1073 | struct sk_buff *reply; |
d6569377 | 1074 | struct sw_flow *flow; |
d6569377 | 1075 | struct datapath *dp; |
3544358a | 1076 | struct flow_table *table; |
d6569377 | 1077 | int err; |
76abe283 | 1078 | int key_len; |
36956a7d | 1079 | |
df2c07f4 JP |
1080 | if (!a[OVS_FLOW_ATTR_KEY]) |
1081 | return flush_flows(ovs_header->dp_ifindex); | |
1082 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
37a1300c BP |
1083 | if (err) |
1084 | return err; | |
d6569377 | 1085 | |
df2c07f4 | 1086 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1087 | if (!dp) |
37a1300c | 1088 | return -ENODEV; |
d6569377 | 1089 | |
37a1300c | 1090 | table = get_table_protected(dp); |
3544358a PS |
1091 | flow = flow_tbl_lookup(table, &key, key_len); |
1092 | if (!flow) | |
37a1300c | 1093 | return -ENOENT; |
d6569377 | 1094 | |
df2c07f4 | 1095 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1096 | if (!reply) |
1097 | return -ENOMEM; | |
1098 | ||
3544358a | 1099 | flow_tbl_remove(table, flow); |
37a1300c | 1100 | |
df2c07f4 JP |
1101 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1102 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1103 | BUG_ON(err < 0); |
1104 | ||
1105 | flow_deferred_free(flow); | |
1106 | ||
1107 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1108 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1109 | return 0; | |
1110 | } | |
1111 | ||
df2c07f4 | 1112 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1113 | { |
df2c07f4 | 1114 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c BP |
1115 | struct datapath *dp; |
1116 | ||
df2c07f4 | 1117 | dp = get_dp(ovs_header->dp_ifindex); |
37a1300c BP |
1118 | if (!dp) |
1119 | return -ENODEV; | |
1120 | ||
1121 | for (;;) { | |
37a1300c BP |
1122 | struct sw_flow *flow; |
1123 | u32 bucket, obj; | |
1124 | ||
1125 | bucket = cb->args[0]; | |
1126 | obj = cb->args[1]; | |
3544358a PS |
1127 | flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj); |
1128 | if (!flow) | |
37a1300c BP |
1129 | break; |
1130 | ||
df2c07f4 | 1131 | if (ovs_flow_cmd_fill_info(flow, dp, skb, NETLINK_CB(cb->skb).pid, |
37a1300c | 1132 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1133 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1134 | break; |
1135 | ||
1136 | cb->args[0] = bucket; | |
1137 | cb->args[1] = obj; | |
1138 | } | |
1139 | return skb->len; | |
704a1e09 BP |
1140 | } |
1141 | ||
37a1300c | 1142 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1143 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1144 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1145 | .policy = flow_policy, | |
df2c07f4 | 1146 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1147 | }, |
df2c07f4 | 1148 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1149 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1150 | .policy = flow_policy, | |
df2c07f4 | 1151 | .doit = ovs_flow_cmd_del |
37a1300c | 1152 | }, |
df2c07f4 | 1153 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1154 | .flags = 0, /* OK for unprivileged users. */ |
1155 | .policy = flow_policy, | |
df2c07f4 JP |
1156 | .doit = ovs_flow_cmd_get, |
1157 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1158 | }, |
df2c07f4 | 1159 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1160 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1161 | .policy = flow_policy, | |
df2c07f4 | 1162 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1163 | }, |
1164 | }; | |
1165 | ||
df2c07f4 | 1166 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1167 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1168 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1169 | #endif |
b063d9f0 | 1170 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1171 | [OVS_DP_ATTR_IPV4_FRAGS] = { .type = NLA_U32 }, |
d6569377 BP |
1172 | }; |
1173 | ||
aaff4b55 BP |
1174 | static struct genl_family dp_datapath_genl_family = { |
1175 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1176 | .hdrsize = sizeof(struct ovs_header), |
1177 | .name = OVS_DATAPATH_FAMILY, | |
aaff4b55 | 1178 | .version = 1, |
df2c07f4 | 1179 | .maxattr = OVS_DP_ATTR_MAX |
aaff4b55 BP |
1180 | }; |
1181 | ||
1182 | static struct genl_multicast_group dp_datapath_multicast_group = { | |
df2c07f4 | 1183 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1184 | }; |
1185 | ||
df2c07f4 | 1186 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1187 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1188 | { |
df2c07f4 | 1189 | struct ovs_header *ovs_header; |
d6569377 | 1190 | struct nlattr *nla; |
064af421 BP |
1191 | int err; |
1192 | ||
df2c07f4 | 1193 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1194 | flags, cmd); |
df2c07f4 | 1195 | if (!ovs_header) |
aaff4b55 | 1196 | goto error; |
064af421 | 1197 | |
b063d9f0 | 1198 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1199 | |
d6569377 | 1200 | rcu_read_lock(); |
df2c07f4 | 1201 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp)); |
d6569377 | 1202 | rcu_read_unlock(); |
064af421 | 1203 | if (err) |
d6569377 | 1204 | goto nla_put_failure; |
064af421 | 1205 | |
df2c07f4 | 1206 | nla = nla_reserve(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats)); |
d6569377 BP |
1207 | if (!nla) |
1208 | goto nla_put_failure; | |
1209 | get_dp_stats(dp, nla_data(nla)); | |
1210 | ||
df2c07f4 JP |
1211 | NLA_PUT_U32(skb, OVS_DP_ATTR_IPV4_FRAGS, |
1212 | dp->drop_frags ? OVS_DP_FRAG_DROP : OVS_DP_FRAG_ZERO); | |
d6569377 | 1213 | |
df2c07f4 | 1214 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1215 | |
1216 | nla_put_failure: | |
df2c07f4 | 1217 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1218 | error: |
1219 | return -EMSGSIZE; | |
d6569377 BP |
1220 | } |
1221 | ||
df2c07f4 | 1222 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1223 | u32 seq, u8 cmd) |
d6569377 | 1224 | { |
d6569377 | 1225 | struct sk_buff *skb; |
aaff4b55 | 1226 | int retval; |
d6569377 | 1227 | |
aaff4b55 | 1228 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1229 | if (!skb) |
d6569377 | 1230 | return ERR_PTR(-ENOMEM); |
659586ef | 1231 | |
df2c07f4 | 1232 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1233 | if (retval < 0) { |
1234 | kfree_skb(skb); | |
1235 | return ERR_PTR(retval); | |
1236 | } | |
1237 | return skb; | |
1238 | } | |
9dca7bd5 | 1239 | |
df2c07f4 | 1240 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1241 | { |
df2c07f4 JP |
1242 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) { |
1243 | u32 frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]); | |
9dca7bd5 | 1244 | |
df2c07f4 | 1245 | if (frags != OVS_DP_FRAG_ZERO && frags != OVS_DP_FRAG_DROP) |
aaff4b55 | 1246 | return -EINVAL; |
d6569377 BP |
1247 | } |
1248 | ||
df2c07f4 | 1249 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1250 | } |
1251 | ||
ed099e92 | 1252 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
df2c07f4 | 1253 | static struct datapath *lookup_datapath(struct ovs_header *ovs_header, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1254 | { |
254f2dc8 BP |
1255 | struct datapath *dp; |
1256 | ||
df2c07f4 JP |
1257 | if (!a[OVS_DP_ATTR_NAME]) |
1258 | dp = get_dp(ovs_header->dp_ifindex); | |
254f2dc8 | 1259 | else { |
d6569377 | 1260 | struct vport *vport; |
d6569377 | 1261 | |
057dd6d2 | 1262 | rcu_read_lock(); |
df2c07f4 JP |
1263 | vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME])); |
1264 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
057dd6d2 | 1265 | rcu_read_unlock(); |
d6569377 | 1266 | } |
254f2dc8 | 1267 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1268 | } |
1269 | ||
ed099e92 | 1270 | /* Called with genl_mutex. */ |
df2c07f4 | 1271 | static void change_datapath(struct datapath *dp, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1272 | { |
df2c07f4 JP |
1273 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) |
1274 | dp->drop_frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]) == OVS_DP_FRAG_DROP; | |
d6569377 BP |
1275 | } |
1276 | ||
df2c07f4 | 1277 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1278 | { |
aaff4b55 | 1279 | struct nlattr **a = info->attrs; |
d6569377 | 1280 | struct vport_parms parms; |
aaff4b55 | 1281 | struct sk_buff *reply; |
d6569377 BP |
1282 | struct datapath *dp; |
1283 | struct vport *vport; | |
d6569377 | 1284 | int err; |
d6569377 | 1285 | |
d6569377 | 1286 | err = -EINVAL; |
df2c07f4 | 1287 | if (!a[OVS_DP_ATTR_NAME]) |
aaff4b55 BP |
1288 | goto err; |
1289 | ||
df2c07f4 | 1290 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1291 | if (err) |
1292 | goto err; | |
d6569377 BP |
1293 | |
1294 | rtnl_lock(); | |
d6569377 BP |
1295 | err = -ENODEV; |
1296 | if (!try_module_get(THIS_MODULE)) | |
ed099e92 | 1297 | goto err_unlock_rtnl; |
d6569377 | 1298 | |
d6569377 BP |
1299 | err = -ENOMEM; |
1300 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1301 | if (dp == NULL) | |
1302 | goto err_put_module; | |
1303 | INIT_LIST_HEAD(&dp->port_list); | |
d6569377 BP |
1304 | |
1305 | /* Initialize kobject for bridge. This will be added as | |
1306 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1307 | dp->ifobj.kset = NULL; | |
1308 | kobject_init(&dp->ifobj, &dp_ktype); | |
1309 | ||
1310 | /* Allocate table. */ | |
1311 | err = -ENOMEM; | |
3544358a | 1312 | rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1313 | if (!dp->table) |
1314 | goto err_free_dp; | |
1315 | ||
99769a40 JG |
1316 | dp->drop_frags = 0; |
1317 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
1318 | if (!dp->stats_percpu) { | |
1319 | err = -ENOMEM; | |
1320 | goto err_destroy_table; | |
1321 | } | |
1322 | ||
1323 | change_datapath(dp, a); | |
1324 | ||
d6569377 | 1325 | /* Set up our datapath device. */ |
df2c07f4 JP |
1326 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1327 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1328 | parms.options = NULL; |
1329 | parms.dp = dp; | |
df2c07f4 | 1330 | parms.port_no = OVSP_LOCAL; |
b063d9f0 JG |
1331 | if (a[OVS_DP_ATTR_UPCALL_PID]) |
1332 | parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); | |
1333 | else | |
1334 | parms.upcall_pid = NETLINK_CB(skb).pid; | |
1335 | ||
d6569377 BP |
1336 | vport = new_vport(&parms); |
1337 | if (IS_ERR(vport)) { | |
1338 | err = PTR_ERR(vport); | |
1339 | if (err == -EBUSY) | |
1340 | err = -EEXIST; | |
1341 | ||
99769a40 | 1342 | goto err_destroy_percpu; |
d6569377 | 1343 | } |
d6569377 | 1344 | |
df2c07f4 | 1345 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1346 | err = PTR_ERR(reply); |
1347 | if (IS_ERR(reply)) | |
1348 | goto err_destroy_local_port; | |
1349 | ||
254f2dc8 | 1350 | list_add_tail(&dp->list_node, &dps); |
d6569377 BP |
1351 | dp_sysfs_add_dp(dp); |
1352 | ||
d6569377 BP |
1353 | rtnl_unlock(); |
1354 | ||
aaff4b55 BP |
1355 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1356 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
d6569377 BP |
1357 | return 0; |
1358 | ||
1359 | err_destroy_local_port: | |
df2c07f4 | 1360 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
99769a40 JG |
1361 | err_destroy_percpu: |
1362 | free_percpu(dp->stats_percpu); | |
d6569377 | 1363 | err_destroy_table: |
3544358a | 1364 | flow_tbl_destroy(get_table_protected(dp)); |
d6569377 | 1365 | err_free_dp: |
d6569377 BP |
1366 | kfree(dp); |
1367 | err_put_module: | |
1368 | module_put(THIS_MODULE); | |
ed099e92 | 1369 | err_unlock_rtnl: |
d6569377 | 1370 | rtnl_unlock(); |
d6569377 | 1371 | err: |
064af421 BP |
1372 | return err; |
1373 | } | |
1374 | ||
df2c07f4 | 1375 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1376 | { |
ed099e92 | 1377 | struct vport *vport, *next_vport; |
aaff4b55 | 1378 | struct sk_buff *reply; |
9c52546b | 1379 | struct datapath *dp; |
d6569377 | 1380 | int err; |
44e05eca | 1381 | |
df2c07f4 | 1382 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 | 1383 | if (err) |
d6569377 | 1384 | goto exit; |
44e05eca | 1385 | |
d6569377 | 1386 | rtnl_lock(); |
aaff4b55 | 1387 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 BP |
1388 | err = PTR_ERR(dp); |
1389 | if (IS_ERR(dp)) | |
aaff4b55 BP |
1390 | goto exit_unlock; |
1391 | ||
df2c07f4 | 1392 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_DEL); |
aaff4b55 BP |
1393 | err = PTR_ERR(reply); |
1394 | if (IS_ERR(reply)) | |
1395 | goto exit_unlock; | |
9c52546b | 1396 | |
ed099e92 | 1397 | list_for_each_entry_safe (vport, next_vport, &dp->port_list, node) |
df2c07f4 | 1398 | if (vport->port_no != OVSP_LOCAL) |
ed099e92 BP |
1399 | dp_detach_port(vport); |
1400 | ||
1401 | dp_sysfs_del_dp(dp); | |
254f2dc8 | 1402 | list_del(&dp->list_node); |
df2c07f4 | 1403 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
ed099e92 | 1404 | |
99620d2c JG |
1405 | /* rtnl_unlock() will wait until all the references to devices that |
1406 | * are pending unregistration have been dropped. We do it here to | |
1407 | * ensure that any internal devices (which contain DP pointers) are | |
1408 | * fully destroyed before freeing the datapath. | |
1409 | */ | |
1410 | rtnl_unlock(); | |
1411 | ||
ed099e92 BP |
1412 | call_rcu(&dp->rcu, destroy_dp_rcu); |
1413 | module_put(THIS_MODULE); | |
1414 | ||
aaff4b55 BP |
1415 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1416 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
99620d2c JG |
1417 | |
1418 | return 0; | |
d6569377 | 1419 | |
aaff4b55 | 1420 | exit_unlock: |
d6569377 BP |
1421 | rtnl_unlock(); |
1422 | exit: | |
1423 | return err; | |
44e05eca BP |
1424 | } |
1425 | ||
df2c07f4 | 1426 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1427 | { |
aaff4b55 | 1428 | struct sk_buff *reply; |
d6569377 | 1429 | struct datapath *dp; |
d6569377 | 1430 | int err; |
064af421 | 1431 | |
df2c07f4 | 1432 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1433 | if (err) |
1434 | return err; | |
38c6ecbc | 1435 | |
aaff4b55 | 1436 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1437 | if (IS_ERR(dp)) |
aaff4b55 | 1438 | return PTR_ERR(dp); |
38c6ecbc | 1439 | |
aaff4b55 | 1440 | change_datapath(dp, info->attrs); |
38c6ecbc | 1441 | |
df2c07f4 | 1442 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1443 | if (IS_ERR(reply)) { |
1444 | err = PTR_ERR(reply); | |
1445 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1446 | dp_datapath_multicast_group.id, err); | |
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1451 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1452 | return 0; | |
064af421 BP |
1453 | } |
1454 | ||
df2c07f4 | 1455 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1456 | { |
aaff4b55 | 1457 | struct sk_buff *reply; |
d6569377 | 1458 | struct datapath *dp; |
d6569377 | 1459 | int err; |
1dcf111b | 1460 | |
df2c07f4 | 1461 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1462 | if (err) |
1463 | return err; | |
1dcf111b | 1464 | |
aaff4b55 | 1465 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1466 | if (IS_ERR(dp)) |
aaff4b55 | 1467 | return PTR_ERR(dp); |
1dcf111b | 1468 | |
df2c07f4 | 1469 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1470 | if (IS_ERR(reply)) |
1471 | return PTR_ERR(reply); | |
1472 | ||
1473 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1474 | } |
1475 | ||
df2c07f4 | 1476 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1477 | { |
254f2dc8 BP |
1478 | struct datapath *dp; |
1479 | int skip = cb->args[0]; | |
1480 | int i = 0; | |
a7786963 | 1481 | |
254f2dc8 BP |
1482 | list_for_each_entry (dp, &dps, list_node) { |
1483 | if (i < skip) | |
d6569377 | 1484 | continue; |
df2c07f4 | 1485 | if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, |
aaff4b55 | 1486 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1487 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1488 | break; |
254f2dc8 | 1489 | i++; |
a7786963 | 1490 | } |
aaff4b55 | 1491 | |
254f2dc8 BP |
1492 | cb->args[0] = i; |
1493 | ||
aaff4b55 | 1494 | return skb->len; |
c19e6535 BP |
1495 | } |
1496 | ||
aaff4b55 | 1497 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1498 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1499 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1500 | .policy = datapath_policy, | |
df2c07f4 | 1501 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1502 | }, |
df2c07f4 | 1503 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1504 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1505 | .policy = datapath_policy, | |
df2c07f4 | 1506 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1507 | }, |
df2c07f4 | 1508 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1509 | .flags = 0, /* OK for unprivileged users. */ |
1510 | .policy = datapath_policy, | |
df2c07f4 JP |
1511 | .doit = ovs_dp_cmd_get, |
1512 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1513 | }, |
df2c07f4 | 1514 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1515 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1516 | .policy = datapath_policy, | |
df2c07f4 | 1517 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1518 | }, |
1519 | }; | |
1520 | ||
df2c07f4 | 1521 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1522 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1523 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1524 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1525 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1526 | #else |
f613a0d7 | 1527 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1528 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1529 | #endif |
d48c88ec JG |
1530 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1531 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1532 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1533 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1534 | }; |
1535 | ||
f0fef760 BP |
1536 | static struct genl_family dp_vport_genl_family = { |
1537 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1538 | .hdrsize = sizeof(struct ovs_header), |
1539 | .name = OVS_VPORT_FAMILY, | |
f0fef760 | 1540 | .version = 1, |
df2c07f4 | 1541 | .maxattr = OVS_VPORT_ATTR_MAX |
f0fef760 BP |
1542 | }; |
1543 | ||
f14d8083 | 1544 | struct genl_multicast_group dp_vport_multicast_group = { |
df2c07f4 | 1545 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1546 | }; |
1547 | ||
1548 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1549 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1550 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1551 | { |
df2c07f4 | 1552 | struct ovs_header *ovs_header; |
c19e6535 | 1553 | struct nlattr *nla; |
c19e6535 BP |
1554 | int err; |
1555 | ||
df2c07f4 | 1556 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1557 | flags, cmd); |
df2c07f4 | 1558 | if (!ovs_header) |
f0fef760 | 1559 | return -EMSGSIZE; |
c19e6535 | 1560 | |
99769a40 | 1561 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1562 | |
df2c07f4 JP |
1563 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
1564 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport_get_type(vport)); | |
1565 | NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport_get_name(vport)); | |
b063d9f0 | 1566 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid); |
c19e6535 | 1567 | |
f613a0d7 | 1568 | nla = nla_reserve(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats)); |
c19e6535 BP |
1569 | if (!nla) |
1570 | goto nla_put_failure; | |
f613a0d7 PS |
1571 | |
1572 | vport_get_stats(vport, nla_data(nla)); | |
c19e6535 | 1573 | |
df2c07f4 | 1574 | NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, vport_get_addr(vport)); |
c19e6535 | 1575 | |
c19e6535 | 1576 | err = vport_get_options(vport, skb); |
f0fef760 BP |
1577 | if (err == -EMSGSIZE) |
1578 | goto error; | |
c19e6535 | 1579 | |
df2c07f4 | 1580 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1581 | |
1582 | nla_put_failure: | |
1583 | err = -EMSGSIZE; | |
f0fef760 | 1584 | error: |
df2c07f4 | 1585 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1586 | return err; |
064af421 BP |
1587 | } |
1588 | ||
f0fef760 | 1589 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1590 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1591 | u32 seq, u8 cmd) | |
064af421 | 1592 | { |
c19e6535 | 1593 | struct sk_buff *skb; |
f0fef760 | 1594 | int retval; |
c19e6535 | 1595 | |
f0fef760 | 1596 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1597 | if (!skb) |
1598 | return ERR_PTR(-ENOMEM); | |
1599 | ||
df2c07f4 | 1600 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1601 | if (retval < 0) { |
1602 | kfree_skb(skb); | |
1603 | return ERR_PTR(retval); | |
1604 | } | |
c19e6535 | 1605 | return skb; |
f0fef760 | 1606 | } |
c19e6535 | 1607 | |
df2c07f4 | 1608 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1609 | { |
df2c07f4 | 1610 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1611 | } |
51d4d598 | 1612 | |
ed099e92 | 1613 | /* Called with RTNL lock or RCU read lock. */ |
df2c07f4 JP |
1614 | static struct vport *lookup_vport(struct ovs_header *ovs_header, |
1615 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
c19e6535 BP |
1616 | { |
1617 | struct datapath *dp; | |
1618 | struct vport *vport; | |
1619 | ||
df2c07f4 JP |
1620 | if (a[OVS_VPORT_ATTR_NAME]) { |
1621 | vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME])); | |
ed099e92 | 1622 | if (!vport) |
c19e6535 | 1623 | return ERR_PTR(-ENODEV); |
c19e6535 | 1624 | return vport; |
df2c07f4 JP |
1625 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1626 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1627 | |
1628 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1629 | return ERR_PTR(-EFBIG); |
c19e6535 | 1630 | |
df2c07f4 | 1631 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1632 | if (!dp) |
1633 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1634 | |
c19e6535 | 1635 | vport = get_vport_protected(dp, port_no); |
ed099e92 | 1636 | if (!vport) |
c19e6535 | 1637 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1638 | return vport; |
1639 | } else | |
1640 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1641 | } |
1642 | ||
ed099e92 | 1643 | /* Called with RTNL lock. */ |
df2c07f4 | 1644 | static int change_vport(struct vport *vport, struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
064af421 | 1645 | { |
c19e6535 | 1646 | int err = 0; |
f613a0d7 | 1647 | |
df2c07f4 | 1648 | if (a[OVS_VPORT_ATTR_STATS]) |
f613a0d7 PS |
1649 | vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
1650 | ||
1651 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
df2c07f4 | 1652 | err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1653 | |
c19e6535 BP |
1654 | return err; |
1655 | } | |
1656 | ||
df2c07f4 | 1657 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1658 | { |
f0fef760 | 1659 | struct nlattr **a = info->attrs; |
df2c07f4 | 1660 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1661 | struct vport_parms parms; |
ed099e92 | 1662 | struct sk_buff *reply; |
c19e6535 | 1663 | struct vport *vport; |
c19e6535 | 1664 | struct datapath *dp; |
b0ec0f27 | 1665 | u32 port_no; |
c19e6535 | 1666 | int err; |
b0ec0f27 | 1667 | |
c19e6535 | 1668 | err = -EINVAL; |
df2c07f4 | 1669 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE]) |
f0fef760 BP |
1670 | goto exit; |
1671 | ||
df2c07f4 | 1672 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1673 | if (err) |
1674 | goto exit; | |
51d4d598 | 1675 | |
c19e6535 | 1676 | rtnl_lock(); |
df2c07f4 | 1677 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1678 | err = -ENODEV; |
1679 | if (!dp) | |
ed099e92 | 1680 | goto exit_unlock; |
c19e6535 | 1681 | |
df2c07f4 JP |
1682 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1683 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1684 | |
1685 | err = -EFBIG; | |
1686 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1687 | goto exit_unlock; |
c19e6535 BP |
1688 | |
1689 | vport = get_vport_protected(dp, port_no); | |
1690 | err = -EBUSY; | |
1691 | if (vport) | |
ed099e92 | 1692 | goto exit_unlock; |
c19e6535 BP |
1693 | } else { |
1694 | for (port_no = 1; ; port_no++) { | |
1695 | if (port_no >= DP_MAX_PORTS) { | |
1696 | err = -EFBIG; | |
ed099e92 | 1697 | goto exit_unlock; |
c19e6535 BP |
1698 | } |
1699 | vport = get_vport_protected(dp, port_no); | |
1700 | if (!vport) | |
1701 | break; | |
51d4d598 | 1702 | } |
064af421 | 1703 | } |
b0ec0f27 | 1704 | |
df2c07f4 JP |
1705 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1706 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1707 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1708 | parms.dp = dp; |
1709 | parms.port_no = port_no; | |
b063d9f0 JG |
1710 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) |
1711 | parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
1712 | else | |
1713 | parms.upcall_pid = NETLINK_CB(skb).pid; | |
c19e6535 BP |
1714 | |
1715 | vport = new_vport(&parms); | |
1716 | err = PTR_ERR(vport); | |
1717 | if (IS_ERR(vport)) | |
ed099e92 | 1718 | goto exit_unlock; |
c19e6535 | 1719 | |
c19e6535 BP |
1720 | dp_sysfs_add_if(vport); |
1721 | ||
1722 | err = change_vport(vport, a); | |
f0fef760 | 1723 | if (!err) { |
df2c07f4 JP |
1724 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
1725 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1726 | if (IS_ERR(reply)) |
1727 | err = PTR_ERR(reply); | |
1728 | } | |
c19e6535 BP |
1729 | if (err) { |
1730 | dp_detach_port(vport); | |
ed099e92 | 1731 | goto exit_unlock; |
c19e6535 | 1732 | } |
f0fef760 BP |
1733 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1734 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
c19e6535 | 1735 | |
c19e6535 | 1736 | |
ed099e92 | 1737 | exit_unlock: |
c19e6535 | 1738 | rtnl_unlock(); |
c19e6535 BP |
1739 | exit: |
1740 | return err; | |
44e05eca BP |
1741 | } |
1742 | ||
df2c07f4 | 1743 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1744 | { |
f0fef760 BP |
1745 | struct nlattr **a = info->attrs; |
1746 | struct sk_buff *reply; | |
c19e6535 | 1747 | struct vport *vport; |
c19e6535 | 1748 | int err; |
44e05eca | 1749 | |
df2c07f4 | 1750 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1751 | if (err) |
c19e6535 BP |
1752 | goto exit; |
1753 | ||
1754 | rtnl_lock(); | |
f0fef760 | 1755 | vport = lookup_vport(info->userhdr, a); |
c19e6535 BP |
1756 | err = PTR_ERR(vport); |
1757 | if (IS_ERR(vport)) | |
f0fef760 | 1758 | goto exit_unlock; |
44e05eca | 1759 | |
c19e6535 | 1760 | err = 0; |
df2c07f4 JP |
1761 | if (a[OVS_VPORT_ATTR_OPTIONS]) |
1762 | err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); | |
c19e6535 BP |
1763 | if (!err) |
1764 | err = change_vport(vport, a); | |
b063d9f0 JG |
1765 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
1766 | vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
c19e6535 | 1767 | |
df2c07f4 JP |
1768 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1769 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1770 | if (IS_ERR(reply)) { |
1771 | err = PTR_ERR(reply); | |
1772 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1773 | dp_vport_multicast_group.id, err); | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1778 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1779 | ||
1780 | exit_unlock: | |
c19e6535 BP |
1781 | rtnl_unlock(); |
1782 | exit: | |
1783 | return err; | |
064af421 BP |
1784 | } |
1785 | ||
df2c07f4 | 1786 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1787 | { |
f0fef760 BP |
1788 | struct nlattr **a = info->attrs; |
1789 | struct sk_buff *reply; | |
c19e6535 | 1790 | struct vport *vport; |
c19e6535 BP |
1791 | int err; |
1792 | ||
df2c07f4 | 1793 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1794 | if (err) |
c19e6535 BP |
1795 | goto exit; |
1796 | ||
1797 | rtnl_lock(); | |
f0fef760 | 1798 | vport = lookup_vport(info->userhdr, a); |
c19e6535 | 1799 | err = PTR_ERR(vport); |
f0fef760 BP |
1800 | if (IS_ERR(vport)) |
1801 | goto exit_unlock; | |
c19e6535 | 1802 | |
df2c07f4 | 1803 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1804 | err = -EINVAL; |
1805 | goto exit_unlock; | |
1806 | } | |
1807 | ||
df2c07f4 JP |
1808 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1809 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1810 | err = PTR_ERR(reply); |
1811 | if (IS_ERR(reply)) | |
1812 | goto exit_unlock; | |
1813 | ||
3544358a | 1814 | dp_detach_port(vport); |
f0fef760 BP |
1815 | |
1816 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1817 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1818 | ||
1819 | exit_unlock: | |
c19e6535 BP |
1820 | rtnl_unlock(); |
1821 | exit: | |
1822 | return err; | |
7c40efc9 BP |
1823 | } |
1824 | ||
df2c07f4 | 1825 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1826 | { |
f0fef760 | 1827 | struct nlattr **a = info->attrs; |
df2c07f4 | 1828 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1829 | struct sk_buff *reply; |
c19e6535 | 1830 | struct vport *vport; |
c19e6535 BP |
1831 | int err; |
1832 | ||
df2c07f4 | 1833 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1834 | if (err) |
1835 | goto exit; | |
c19e6535 | 1836 | |
ed099e92 | 1837 | rcu_read_lock(); |
df2c07f4 | 1838 | vport = lookup_vport(ovs_header, a); |
c19e6535 BP |
1839 | err = PTR_ERR(vport); |
1840 | if (IS_ERR(vport)) | |
f0fef760 | 1841 | goto exit_unlock; |
c19e6535 | 1842 | |
df2c07f4 JP |
1843 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1844 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1845 | err = PTR_ERR(reply); |
1846 | if (IS_ERR(reply)) | |
f0fef760 | 1847 | goto exit_unlock; |
ed099e92 | 1848 | |
df2fa9b5 JG |
1849 | rcu_read_unlock(); |
1850 | ||
1851 | return genlmsg_reply(reply, info); | |
ed099e92 | 1852 | |
f0fef760 | 1853 | exit_unlock: |
ed099e92 | 1854 | rcu_read_unlock(); |
f0fef760 | 1855 | exit: |
c19e6535 BP |
1856 | return err; |
1857 | } | |
1858 | ||
df2c07f4 | 1859 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1860 | { |
df2c07f4 | 1861 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 BP |
1862 | struct datapath *dp; |
1863 | u32 port_no; | |
f0fef760 | 1864 | int retval; |
c19e6535 | 1865 | |
df2c07f4 | 1866 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 | 1867 | if (!dp) |
f0fef760 | 1868 | return -ENODEV; |
ed099e92 BP |
1869 | |
1870 | rcu_read_lock(); | |
f0fef760 | 1871 | for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) { |
ed099e92 | 1872 | struct vport *vport; |
ed099e92 BP |
1873 | |
1874 | vport = get_vport_protected(dp, port_no); | |
1875 | if (!vport) | |
1876 | continue; | |
1877 | ||
df2c07f4 | 1878 | if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid, |
f0fef760 | 1879 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1880 | OVS_VPORT_CMD_NEW) < 0) |
f0fef760 | 1881 | break; |
c19e6535 | 1882 | } |
ed099e92 | 1883 | rcu_read_unlock(); |
c19e6535 | 1884 | |
f0fef760 BP |
1885 | cb->args[0] = port_no; |
1886 | retval = skb->len; | |
1887 | ||
1888 | return retval; | |
7c40efc9 BP |
1889 | } |
1890 | ||
f0fef760 | 1891 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1892 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1893 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1894 | .policy = vport_policy, | |
df2c07f4 | 1895 | .doit = ovs_vport_cmd_new |
f0fef760 | 1896 | }, |
df2c07f4 | 1897 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1898 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1899 | .policy = vport_policy, | |
df2c07f4 | 1900 | .doit = ovs_vport_cmd_del |
f0fef760 | 1901 | }, |
df2c07f4 | 1902 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1903 | .flags = 0, /* OK for unprivileged users. */ |
1904 | .policy = vport_policy, | |
df2c07f4 JP |
1905 | .doit = ovs_vport_cmd_get, |
1906 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1907 | }, |
df2c07f4 | 1908 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1909 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1910 | .policy = vport_policy, | |
df2c07f4 | 1911 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1912 | }, |
1913 | }; | |
1914 | ||
982b8810 BP |
1915 | struct genl_family_and_ops { |
1916 | struct genl_family *family; | |
1917 | struct genl_ops *ops; | |
1918 | int n_ops; | |
1919 | struct genl_multicast_group *group; | |
1920 | }; | |
ed099e92 | 1921 | |
982b8810 | 1922 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1923 | { &dp_datapath_genl_family, |
1924 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1925 | &dp_datapath_multicast_group }, | |
f0fef760 BP |
1926 | { &dp_vport_genl_family, |
1927 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1928 | &dp_vport_multicast_group }, | |
37a1300c BP |
1929 | { &dp_flow_genl_family, |
1930 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1931 | &dp_flow_multicast_group }, | |
982b8810 BP |
1932 | { &dp_packet_genl_family, |
1933 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1934 | NULL }, | |
1935 | }; | |
ed099e92 | 1936 | |
982b8810 BP |
1937 | static void dp_unregister_genl(int n_families) |
1938 | { | |
1939 | int i; | |
ed099e92 | 1940 | |
b867ca75 | 1941 | for (i = 0; i < n_families; i++) |
982b8810 | 1942 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
1943 | } |
1944 | ||
982b8810 | 1945 | static int dp_register_genl(void) |
064af421 | 1946 | { |
982b8810 BP |
1947 | int n_registered; |
1948 | int err; | |
1949 | int i; | |
064af421 | 1950 | |
982b8810 BP |
1951 | n_registered = 0; |
1952 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
1953 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 1954 | |
982b8810 BP |
1955 | err = genl_register_family_with_ops(f->family, f->ops, |
1956 | f->n_ops); | |
1957 | if (err) | |
1958 | goto error; | |
1959 | n_registered++; | |
e22d4953 | 1960 | |
982b8810 BP |
1961 | if (f->group) { |
1962 | err = genl_register_mc_group(f->family, f->group); | |
1963 | if (err) | |
1964 | goto error; | |
1965 | } | |
1966 | } | |
9cc8b4e4 | 1967 | |
982b8810 | 1968 | return 0; |
064af421 BP |
1969 | |
1970 | error: | |
982b8810 BP |
1971 | dp_unregister_genl(n_registered); |
1972 | return err; | |
064af421 BP |
1973 | } |
1974 | ||
22d24ebf BP |
1975 | static int __init dp_init(void) |
1976 | { | |
f2459fe7 | 1977 | struct sk_buff *dummy_skb; |
22d24ebf BP |
1978 | int err; |
1979 | ||
f2459fe7 | 1980 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 1981 | |
f2459fe7 | 1982 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 | 1983 | |
3544358a | 1984 | err = tnl_init(); |
064af421 BP |
1985 | if (err) |
1986 | goto error; | |
1987 | ||
3544358a PS |
1988 | err = flow_init(); |
1989 | if (err) | |
1990 | goto error_tnl_exit; | |
1991 | ||
f2459fe7 | 1992 | err = vport_init(); |
064af421 BP |
1993 | if (err) |
1994 | goto error_flow_exit; | |
1995 | ||
f2459fe7 JG |
1996 | err = register_netdevice_notifier(&dp_device_notifier); |
1997 | if (err) | |
1998 | goto error_vport_exit; | |
1999 | ||
982b8810 BP |
2000 | err = dp_register_genl(); |
2001 | if (err < 0) | |
37a1300c | 2002 | goto error_unreg_notifier; |
982b8810 | 2003 | |
064af421 BP |
2004 | return 0; |
2005 | ||
2006 | error_unreg_notifier: | |
2007 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2008 | error_vport_exit: |
2009 | vport_exit(); | |
064af421 BP |
2010 | error_flow_exit: |
2011 | flow_exit(); | |
3544358a PS |
2012 | error_tnl_exit: |
2013 | tnl_exit(); | |
064af421 BP |
2014 | error: |
2015 | return err; | |
2016 | } | |
2017 | ||
2018 | static void dp_cleanup(void) | |
2019 | { | |
2020 | rcu_barrier(); | |
982b8810 | 2021 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
064af421 | 2022 | unregister_netdevice_notifier(&dp_device_notifier); |
f2459fe7 | 2023 | vport_exit(); |
064af421 | 2024 | flow_exit(); |
3544358a | 2025 | tnl_exit(); |
064af421 BP |
2026 | } |
2027 | ||
2028 | module_init(dp_init); | |
2029 | module_exit(dp_cleanup); | |
2030 | ||
2031 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2032 | MODULE_LICENSE("GPL"); |