]>
Commit | Line | Data |
---|---|---|
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> | |
077257b8 | 42 | #include <linux/openvswitch.h> |
064af421 | 43 | #include <linux/rculist.h> |
064af421 | 44 | #include <linux/dmi.h> |
3c5f6de3 | 45 | #include <net/inet_ecn.h> |
36956a7d | 46 | #include <net/genetlink.h> |
064af421 | 47 | |
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) || \ |
a0003c0c PS |
57 | LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0) |
58 | #error Kernels before 2.6.18 or after 3.1 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 *); |
98403001 | 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; |
e9141eec | 283 | u64 *stats_counter; |
4c1ad233 | 284 | int error; |
064af421 | 285 | |
e9141eec | 286 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
e779d8d9 | 287 | OVS_CB(skb)->vport = p; |
a063b0df | 288 | |
3976f6d5 | 289 | if (!OVS_CB(skb)->flow) { |
36956a7d | 290 | struct sw_flow_key key; |
76abe283 | 291 | int key_len; |
b7a31ec1 | 292 | bool is_frag; |
4c1ad233 | 293 | |
3976f6d5 | 294 | /* Extract flow from 'skb' into 'key'. */ |
76abe283 | 295 | error = flow_extract(skb, p->port_no, &key, &key_len, &is_frag); |
3976f6d5 JG |
296 | if (unlikely(error)) { |
297 | kfree_skb(skb); | |
298 | return; | |
299 | } | |
064af421 | 300 | |
b7a31ec1 | 301 | if (is_frag && dp->drop_frags) { |
5b95ab0e | 302 | consume_skb(skb); |
e9141eec | 303 | stats_counter = &stats->n_frags; |
3976f6d5 JG |
304 | goto out; |
305 | } | |
306 | ||
307 | /* Look up flow. */ | |
3544358a PS |
308 | flow = flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len); |
309 | if (unlikely(!flow)) { | |
856081f6 BP |
310 | struct dp_upcall_info upcall; |
311 | ||
df2c07f4 | 312 | upcall.cmd = OVS_PACKET_CMD_MISS; |
856081f6 | 313 | upcall.key = &key; |
98403001 BP |
314 | upcall.userdata = NULL; |
315 | upcall.pid = p->upcall_pid; | |
856081f6 | 316 | dp_upcall(dp, skb, &upcall); |
36ce148c | 317 | kfree_skb(skb); |
e9141eec | 318 | stats_counter = &stats->n_missed; |
3976f6d5 JG |
319 | goto out; |
320 | } | |
321 | ||
3544358a | 322 | OVS_CB(skb)->flow = flow; |
55574bb0 BP |
323 | } |
324 | ||
e9141eec | 325 | stats_counter = &stats->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. */ |
38c6ecbc JG |
331 | |
332 | write_seqcount_begin(&stats->seqlock); | |
e9141eec | 333 | (*stats_counter)++; |
38c6ecbc | 334 | write_seqcount_end(&stats->seqlock); |
064af421 BP |
335 | } |
336 | ||
856081f6 BP |
337 | static void copy_and_csum_skb(struct sk_buff *skb, void *to) |
338 | { | |
339 | u16 csum_start, csum_offset; | |
340 | __wsum csum; | |
341 | ||
342 | get_skb_csum_pointers(skb, &csum_start, &csum_offset); | |
343 | csum_start -= skb_headroom(skb); | |
856081f6 BP |
344 | |
345 | skb_copy_bits(skb, 0, to, csum_start); | |
346 | ||
347 | csum = skb_copy_and_csum_bits(skb, csum_start, to + csum_start, | |
348 | skb->len - csum_start, 0); | |
349 | *(__sum16 *)(to + csum_start + csum_offset) = csum_fold(csum); | |
350 | } | |
351 | ||
aa5a8fdc JG |
352 | static struct genl_family dp_packet_genl_family = { |
353 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
354 | .hdrsize = sizeof(struct ovs_header), |
355 | .name = OVS_PACKET_FAMILY, | |
aa5a8fdc | 356 | .version = 1, |
df2c07f4 | 357 | .maxattr = OVS_PACKET_ATTR_MAX |
aa5a8fdc JG |
358 | }; |
359 | ||
36ce148c PS |
360 | int dp_upcall(struct datapath *dp, struct sk_buff *skb, |
361 | const struct dp_upcall_info *upcall_info) | |
aa5a8fdc | 362 | { |
36ce148c | 363 | struct sk_buff *segs = NULL; |
aa5a8fdc JG |
364 | struct dp_stats_percpu *stats; |
365 | int err; | |
366 | ||
98403001 | 367 | if (upcall_info->pid == 0) { |
b063d9f0 | 368 | err = -ENOTCONN; |
b063d9f0 JG |
369 | goto err; |
370 | } | |
371 | ||
c3729ee4 | 372 | forward_ip_summed(skb, true); |
aa5a8fdc JG |
373 | |
374 | /* Break apart GSO packets into their component pieces. Otherwise | |
375 | * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */ | |
376 | if (skb_is_gso(skb)) { | |
36ce148c | 377 | segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM); |
aa5a8fdc | 378 | |
36ce148c PS |
379 | if (IS_ERR(segs)) { |
380 | err = PTR_ERR(segs); | |
aa5a8fdc JG |
381 | goto err; |
382 | } | |
36ce148c | 383 | skb = segs; |
aa5a8fdc JG |
384 | } |
385 | ||
98403001 | 386 | err = queue_userspace_packets(dp, skb, upcall_info); |
36ce148c PS |
387 | if (segs) { |
388 | struct sk_buff *next; | |
389 | /* Free GSO-segments */ | |
390 | do { | |
391 | next = segs->next; | |
392 | kfree_skb(segs); | |
393 | } while ((segs = next) != NULL); | |
394 | } | |
395 | ||
d76195db JG |
396 | if (err) |
397 | goto err; | |
398 | ||
399 | return 0; | |
aa5a8fdc | 400 | |
aa5a8fdc | 401 | err: |
aa5a8fdc JG |
402 | stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id()); |
403 | ||
404 | write_seqcount_begin(&stats->seqlock); | |
405 | stats->n_lost++; | |
406 | write_seqcount_end(&stats->seqlock); | |
407 | ||
aa5a8fdc | 408 | return err; |
982b8810 BP |
409 | } |
410 | ||
411 | /* Send each packet in the 'skb' list to userspace for 'dp' as directed by | |
412 | * 'upcall_info'. There will be only one packet unless we broke up a GSO | |
413 | * packet. | |
414 | */ | |
98403001 | 415 | static int queue_userspace_packets(struct datapath *dp, struct sk_buff *skb, |
b063d9f0 | 416 | const struct dp_upcall_info *upcall_info) |
cb5087ca | 417 | { |
99769a40 | 418 | int dp_ifindex; |
cb5087ca | 419 | |
99769a40 | 420 | dp_ifindex = get_dpifindex(dp); |
36ce148c PS |
421 | if (!dp_ifindex) |
422 | return -ENODEV; | |
99769a40 | 423 | |
cb5087ca | 424 | do { |
df2c07f4 | 425 | struct ovs_header *upcall; |
856081f6 BP |
426 | struct sk_buff *user_skb; /* to be queued to userspace */ |
427 | struct nlattr *nla; | |
428 | unsigned int len; | |
36ce148c | 429 | int err; |
cb5087ca | 430 | |
303708cc JG |
431 | err = vlan_deaccel_tag(skb); |
432 | if (unlikely(err)) | |
36ce148c | 433 | return err; |
6ce39213 | 434 | |
36ce148c PS |
435 | if (nla_attr_size(skb->len) > USHRT_MAX) |
436 | return -EFBIG; | |
51313015 | 437 | |
df2c07f4 | 438 | len = sizeof(struct ovs_header); |
856081f6 BP |
439 | len += nla_total_size(skb->len); |
440 | len += nla_total_size(FLOW_BUFSIZE); | |
6ff686f2 | 441 | if (upcall_info->cmd == OVS_PACKET_CMD_ACTION) |
856081f6 | 442 | len += nla_total_size(8); |
856081f6 | 443 | |
982b8810 | 444 | user_skb = genlmsg_new(len, GFP_ATOMIC); |
36ce148c PS |
445 | if (!user_skb) |
446 | return -ENOMEM; | |
cb5087ca | 447 | |
36ce148c PS |
448 | upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, |
449 | 0, upcall_info->cmd); | |
99769a40 | 450 | upcall->dp_ifindex = dp_ifindex; |
856081f6 | 451 | |
df2c07f4 | 452 | nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY); |
856081f6 BP |
453 | flow_to_nlattrs(upcall_info->key, user_skb); |
454 | nla_nest_end(user_skb, nla); | |
cb5087ca | 455 | |
98403001 | 456 | if (upcall_info->userdata) |
6ff686f2 | 457 | nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA, |
98403001 | 458 | nla_get_u64(upcall_info->userdata)); |
856081f6 | 459 | |
df2c07f4 | 460 | nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len); |
856081f6 BP |
461 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
462 | copy_and_csum_skb(skb, nla_data(nla)); | |
463 | else | |
464 | skb_copy_bits(skb, 0, nla_data(nla), skb->len); | |
465 | ||
98403001 | 466 | err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid); |
982b8810 | 467 | if (err) |
36ce148c | 468 | return err; |
856081f6 | 469 | |
36ce148c | 470 | } while ((skb = skb->next)); |
cb5087ca | 471 | |
36ce148c | 472 | return 0; |
cb5087ca BP |
473 | } |
474 | ||
ed099e92 | 475 | /* Called with genl_mutex. */ |
254f2dc8 | 476 | static int flush_flows(int dp_ifindex) |
064af421 | 477 | { |
3544358a PS |
478 | struct flow_table *old_table; |
479 | struct flow_table *new_table; | |
9c52546b | 480 | struct datapath *dp; |
9c52546b | 481 | |
254f2dc8 | 482 | dp = get_dp(dp_ifindex); |
9c52546b | 483 | if (!dp) |
ed099e92 | 484 | return -ENODEV; |
8d5ebd83 | 485 | |
9c52546b | 486 | old_table = get_table_protected(dp); |
3544358a | 487 | new_table = flow_tbl_alloc(TBL_MIN_BUCKETS); |
8d5ebd83 | 488 | if (!new_table) |
ed099e92 | 489 | return -ENOMEM; |
8d5ebd83 JG |
490 | |
491 | rcu_assign_pointer(dp->table, new_table); | |
492 | ||
3544358a | 493 | flow_tbl_deferred_destroy(old_table); |
ed099e92 | 494 | return 0; |
064af421 BP |
495 | } |
496 | ||
4edb9ae9 PS |
497 | static int validate_actions(const struct nlattr *attr, |
498 | const struct sw_flow_key *key, int depth); | |
6ff686f2 | 499 | |
4edb9ae9 PS |
500 | static int validate_sample(const struct nlattr *attr, |
501 | const struct sw_flow_key *key, int depth) | |
6ff686f2 PS |
502 | { |
503 | static const struct nla_policy sample_policy[OVS_SAMPLE_ATTR_MAX + 1] = | |
504 | { | |
505 | [OVS_SAMPLE_ATTR_PROBABILITY] = {.type = NLA_U32 }, | |
506 | [OVS_SAMPLE_ATTR_ACTIONS] = {.type = NLA_UNSPEC }, | |
507 | }; | |
508 | struct nlattr *a[OVS_SAMPLE_ATTR_MAX + 1]; | |
509 | int error; | |
510 | ||
511 | error = nla_parse_nested(a, OVS_SAMPLE_ATTR_MAX, attr, sample_policy); | |
512 | if (error) | |
513 | return error; | |
514 | ||
515 | if (!a[OVS_SAMPLE_ATTR_PROBABILITY]) | |
516 | return -EINVAL; | |
517 | if (!a[OVS_SAMPLE_ATTR_ACTIONS]) | |
518 | return -EINVAL; | |
519 | ||
4edb9ae9 PS |
520 | return validate_actions(a[OVS_SAMPLE_ATTR_ACTIONS], key, (depth + 1)); |
521 | } | |
522 | ||
523 | static int validate_action_key(const struct nlattr *a, | |
524 | const struct sw_flow_key *flow_key) | |
525 | { | |
526 | int act_type = nla_type(a); | |
527 | const struct nlattr *ovs_key = nla_data(a); | |
528 | int key_type = nla_type(ovs_key); | |
529 | ||
530 | /* There can be only one key in a action */ | |
531 | if (nla_total_size(nla_len(ovs_key)) != nla_len(a)) | |
532 | return -EINVAL; | |
533 | ||
534 | if (key_type > OVS_KEY_ATTR_MAX || | |
535 | nla_len(ovs_key) != ovs_key_lens[key_type]) | |
536 | return -EINVAL; | |
537 | ||
538 | #define ACTION(act, key) ((act << 8) | key) | |
539 | ||
540 | switch(ACTION(act_type, key_type)) { | |
541 | const struct ovs_key_ipv4 *ipv4_key; | |
542 | const struct ovs_key_8021q *q_key; | |
543 | ||
544 | case ACTION(OVS_ACTION_ATTR_SET, OVS_KEY_ATTR_TUN_ID): | |
545 | case ACTION(OVS_ACTION_ATTR_SET, OVS_KEY_ATTR_ETHERNET): | |
546 | break; | |
547 | ||
548 | case ACTION(OVS_ACTION_ATTR_PUSH, OVS_KEY_ATTR_8021Q): | |
549 | q_key = nla_data(ovs_key); | |
550 | if (q_key->q_tpid != htons(ETH_P_8021Q)) | |
551 | return -EINVAL; | |
552 | ||
553 | if (q_key->q_tci & htons(VLAN_TAG_PRESENT)) | |
554 | return -EINVAL; | |
555 | break; | |
556 | ||
557 | case ACTION(OVS_ACTION_ATTR_SET, OVS_KEY_ATTR_IPV4): | |
558 | if (flow_key->eth.type != htons(ETH_P_IP)) | |
559 | return -EINVAL; | |
560 | ||
561 | if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst) | |
562 | return -EINVAL; | |
563 | ||
564 | ipv4_key = nla_data(ovs_key); | |
565 | if (ipv4_key->ipv4_proto != flow_key->ip.proto) | |
566 | return -EINVAL; | |
567 | ||
568 | if (ipv4_key->ipv4_tos & INET_ECN_MASK) | |
569 | return -EINVAL; | |
570 | break; | |
571 | ||
572 | case ACTION(OVS_ACTION_ATTR_SET, OVS_KEY_ATTR_TCP): | |
573 | if (flow_key->ip.proto != IPPROTO_TCP) | |
574 | return -EINVAL; | |
575 | ||
576 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
577 | return -EINVAL; | |
578 | ||
579 | break; | |
580 | ||
581 | case ACTION(OVS_ACTION_ATTR_SET, OVS_KEY_ATTR_UDP): | |
582 | if (flow_key->ip.proto != IPPROTO_UDP) | |
583 | return -EINVAL; | |
584 | ||
585 | if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst) | |
586 | return -EINVAL; | |
587 | break; | |
588 | ||
589 | default: | |
590 | return -EINVAL; | |
591 | } | |
592 | #undef ACTION | |
593 | return 0; | |
6ff686f2 PS |
594 | } |
595 | ||
98403001 BP |
596 | static int validate_userspace(const struct nlattr *attr) |
597 | { | |
598 | static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = | |
599 | { | |
600 | [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 }, | |
601 | [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 }, | |
602 | }; | |
603 | struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1]; | |
604 | int error; | |
605 | ||
606 | error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, attr, userspace_policy); | |
607 | if (error) | |
608 | return error; | |
609 | ||
610 | if (!a[OVS_USERSPACE_ATTR_PID] || !nla_get_u32(a[OVS_USERSPACE_ATTR_PID])) | |
611 | return -EINVAL; | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
4edb9ae9 PS |
616 | static int validate_actions(const struct nlattr *attr, |
617 | const struct sw_flow_key *key, int depth) | |
064af421 | 618 | { |
23cad98c | 619 | const struct nlattr *a; |
6ff686f2 PS |
620 | int rem, err; |
621 | ||
622 | if (depth >= SAMPLE_ACTION_DEPTH) | |
623 | return -EOVERFLOW; | |
23cad98c | 624 | |
37a1300c | 625 | nla_for_each_nested(a, attr, rem) { |
98403001 | 626 | /* Expected argument lengths, (u32)-1 for variable length. */ |
df2c07f4 JP |
627 | static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = { |
628 | [OVS_ACTION_ATTR_OUTPUT] = 4, | |
98403001 | 629 | [OVS_ACTION_ATTR_USERSPACE] = (u32)-1, |
4edb9ae9 PS |
630 | [OVS_ACTION_ATTR_PUSH] = (u32)-1, |
631 | [OVS_ACTION_ATTR_POP] = 2, | |
632 | [OVS_ACTION_ATTR_SET] = (u32)-1, | |
df2c07f4 JP |
633 | [OVS_ACTION_ATTR_SET_PRIORITY] = 4, |
634 | [OVS_ACTION_ATTR_POP_PRIORITY] = 0, | |
98403001 | 635 | [OVS_ACTION_ATTR_SAMPLE] = (u32)-1 |
23cad98c BP |
636 | }; |
637 | int type = nla_type(a); | |
638 | ||
6ff686f2 | 639 | if (type > OVS_ACTION_ATTR_MAX || |
98403001 BP |
640 | (action_lens[type] != nla_len(a) && |
641 | action_lens[type] != (u32)-1)) | |
23cad98c BP |
642 | return -EINVAL; |
643 | ||
644 | switch (type) { | |
df2c07f4 | 645 | case OVS_ACTION_ATTR_UNSPEC: |
cdee00fd | 646 | return -EINVAL; |
064af421 | 647 | |
df2c07f4 JP |
648 | case OVS_ACTION_ATTR_SET_PRIORITY: |
649 | case OVS_ACTION_ATTR_POP_PRIORITY: | |
23cad98c BP |
650 | /* No validation needed. */ |
651 | break; | |
652 | ||
98403001 BP |
653 | case OVS_ACTION_ATTR_USERSPACE: |
654 | err = validate_userspace(a); | |
655 | if (err) | |
656 | return err; | |
657 | break; | |
658 | ||
df2c07f4 | 659 | case OVS_ACTION_ATTR_OUTPUT: |
23cad98c BP |
660 | if (nla_get_u32(a) >= DP_MAX_PORTS) |
661 | return -EINVAL; | |
3b1fc5f3 | 662 | break; |
cdee00fd | 663 | |
4edb9ae9 PS |
664 | |
665 | case OVS_ACTION_ATTR_POP: | |
666 | if (nla_get_u16(a) != OVS_KEY_ATTR_8021Q) | |
064af421 | 667 | return -EINVAL; |
23cad98c | 668 | break; |
064af421 | 669 | |
4edb9ae9 PS |
670 | case OVS_ACTION_ATTR_SET: |
671 | case OVS_ACTION_ATTR_PUSH: | |
672 | err = validate_action_key(a, key); | |
673 | if (err) | |
674 | return err; | |
23cad98c | 675 | break; |
064af421 | 676 | |
6ff686f2 | 677 | case OVS_ACTION_ATTR_SAMPLE: |
4edb9ae9 | 678 | err = validate_sample(a, key, depth); |
6ff686f2 PS |
679 | if (err) |
680 | return err; | |
681 | break; | |
682 | ||
23cad98c | 683 | default: |
4edb9ae9 | 684 | return -EINVAL; |
23cad98c BP |
685 | } |
686 | } | |
3c5f6de3 | 687 | |
23cad98c BP |
688 | if (rem > 0) |
689 | return -EINVAL; | |
064af421 | 690 | |
23cad98c | 691 | return 0; |
064af421 | 692 | } |
4edb9ae9 | 693 | |
064af421 BP |
694 | static void clear_stats(struct sw_flow *flow) |
695 | { | |
6bfafa55 | 696 | flow->used = 0; |
064af421 | 697 | flow->tcp_flags = 0; |
064af421 BP |
698 | flow->packet_count = 0; |
699 | flow->byte_count = 0; | |
700 | } | |
701 | ||
df2c07f4 | 702 | static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info) |
064af421 | 703 | { |
df2c07f4 | 704 | struct ovs_header *ovs_header = info->userhdr; |
982b8810 | 705 | struct nlattr **a = info->attrs; |
e0e57990 | 706 | struct sw_flow_actions *acts; |
982b8810 | 707 | struct sk_buff *packet; |
e0e57990 | 708 | struct sw_flow *flow; |
f7cd0081 | 709 | struct datapath *dp; |
d6569377 BP |
710 | struct ethhdr *eth; |
711 | bool is_frag; | |
3f19d399 | 712 | int len; |
d6569377 | 713 | int err; |
76abe283 | 714 | int key_len; |
064af421 | 715 | |
f7cd0081 | 716 | err = -EINVAL; |
df2c07f4 JP |
717 | if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] || |
718 | !a[OVS_PACKET_ATTR_ACTIONS] || | |
719 | nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN) | |
e5cad958 | 720 | goto err; |
064af421 | 721 | |
df2c07f4 | 722 | len = nla_len(a[OVS_PACKET_ATTR_PACKET]); |
3f19d399 | 723 | packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL); |
f7cd0081 BP |
724 | err = -ENOMEM; |
725 | if (!packet) | |
e5cad958 | 726 | goto err; |
3f19d399 BP |
727 | skb_reserve(packet, NET_IP_ALIGN); |
728 | ||
df2c07f4 | 729 | memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len); |
8d5ebd83 | 730 | |
f7cd0081 BP |
731 | skb_reset_mac_header(packet); |
732 | eth = eth_hdr(packet); | |
064af421 | 733 | |
d6569377 BP |
734 | /* Normally, setting the skb 'protocol' field would be handled by a |
735 | * call to eth_type_trans(), but it assumes there's a sending | |
736 | * device, which we may not have. */ | |
737 | if (ntohs(eth->h_proto) >= 1536) | |
f7cd0081 | 738 | packet->protocol = eth->h_proto; |
d6569377 | 739 | else |
f7cd0081 | 740 | packet->protocol = htons(ETH_P_802_2); |
d3c54451 | 741 | |
e0e57990 BP |
742 | /* Build an sw_flow for sending this packet. */ |
743 | flow = flow_alloc(); | |
744 | err = PTR_ERR(flow); | |
745 | if (IS_ERR(flow)) | |
e5cad958 | 746 | goto err_kfree_skb; |
064af421 | 747 | |
76abe283 | 748 | err = flow_extract(packet, -1, &flow->key, &key_len, &is_frag); |
e0e57990 BP |
749 | if (err) |
750 | goto err_flow_put; | |
e0e57990 | 751 | |
80e5eed9 BP |
752 | err = flow_metadata_from_nlattrs(&flow->key.eth.in_port, |
753 | &flow->key.eth.tun_id, | |
df2c07f4 | 754 | a[OVS_PACKET_ATTR_KEY]); |
80e5eed9 BP |
755 | if (err) |
756 | goto err_flow_put; | |
757 | ||
4edb9ae9 PS |
758 | err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0); |
759 | if (err) | |
760 | goto err_flow_put; | |
761 | ||
3544358a | 762 | flow->hash = flow_hash(&flow->key, key_len); |
0fe255df | 763 | |
df2c07f4 | 764 | acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]); |
e0e57990 BP |
765 | err = PTR_ERR(acts); |
766 | if (IS_ERR(acts)) | |
767 | goto err_flow_put; | |
768 | rcu_assign_pointer(flow->sf_acts, acts); | |
769 | ||
770 | OVS_CB(packet)->flow = flow; | |
771 | ||
d6569377 | 772 | rcu_read_lock(); |
df2c07f4 | 773 | dp = get_dp(ovs_header->dp_ifindex); |
f7cd0081 | 774 | err = -ENODEV; |
e5cad958 BP |
775 | if (!dp) |
776 | goto err_unlock; | |
cc4015df JG |
777 | |
778 | if (flow->key.eth.in_port < DP_MAX_PORTS) | |
779 | OVS_CB(packet)->vport = get_vport_protected(dp, | |
780 | flow->key.eth.in_port); | |
781 | ||
e9141eec | 782 | local_bh_disable(); |
a4af2475 | 783 | err = execute_actions(dp, packet); |
e9141eec | 784 | local_bh_enable(); |
d6569377 | 785 | rcu_read_unlock(); |
e0e57990 BP |
786 | |
787 | flow_put(flow); | |
e5cad958 | 788 | return err; |
064af421 | 789 | |
e5cad958 BP |
790 | err_unlock: |
791 | rcu_read_unlock(); | |
e0e57990 BP |
792 | err_flow_put: |
793 | flow_put(flow); | |
e5cad958 BP |
794 | err_kfree_skb: |
795 | kfree_skb(packet); | |
796 | err: | |
d6569377 | 797 | return err; |
064af421 BP |
798 | } |
799 | ||
df2c07f4 JP |
800 | static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = { |
801 | [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC }, | |
802 | [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED }, | |
803 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
982b8810 BP |
804 | }; |
805 | ||
806 | static struct genl_ops dp_packet_genl_ops[] = { | |
df2c07f4 | 807 | { .cmd = OVS_PACKET_CMD_EXECUTE, |
982b8810 BP |
808 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
809 | .policy = packet_policy, | |
df2c07f4 | 810 | .doit = ovs_packet_cmd_execute |
982b8810 BP |
811 | } |
812 | }; | |
813 | ||
df2c07f4 | 814 | static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats) |
064af421 | 815 | { |
d6569377 | 816 | int i; |
3544358a | 817 | struct flow_table *table = get_table_protected(dp); |
f180c2e2 | 818 | |
3544358a | 819 | stats->n_flows = flow_tbl_count(table); |
064af421 | 820 | |
d6569377 BP |
821 | stats->n_frags = stats->n_hit = stats->n_missed = stats->n_lost = 0; |
822 | for_each_possible_cpu(i) { | |
823 | const struct dp_stats_percpu *percpu_stats; | |
824 | struct dp_stats_percpu local_stats; | |
825 | unsigned seqcount; | |
44e05eca | 826 | |
d6569377 | 827 | percpu_stats = per_cpu_ptr(dp->stats_percpu, i); |
064af421 | 828 | |
d6569377 BP |
829 | do { |
830 | seqcount = read_seqcount_begin(&percpu_stats->seqlock); | |
831 | local_stats = *percpu_stats; | |
832 | } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); | |
064af421 | 833 | |
d6569377 BP |
834 | stats->n_frags += local_stats.n_frags; |
835 | stats->n_hit += local_stats.n_hit; | |
836 | stats->n_missed += local_stats.n_missed; | |
837 | stats->n_lost += local_stats.n_lost; | |
838 | } | |
839 | } | |
064af421 | 840 | |
df2c07f4 JP |
841 | static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = { |
842 | [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED }, | |
843 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED }, | |
844 | [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG }, | |
d6569377 | 845 | }; |
36956a7d | 846 | |
37a1300c BP |
847 | static struct genl_family dp_flow_genl_family = { |
848 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
849 | .hdrsize = sizeof(struct ovs_header), |
850 | .name = OVS_FLOW_FAMILY, | |
37a1300c | 851 | .version = 1, |
df2c07f4 | 852 | .maxattr = OVS_FLOW_ATTR_MAX |
37a1300c | 853 | }; |
ed099e92 | 854 | |
37a1300c | 855 | static struct genl_multicast_group dp_flow_multicast_group = { |
df2c07f4 | 856 | .name = OVS_FLOW_MCGROUP |
37a1300c BP |
857 | }; |
858 | ||
859 | /* Called with genl_lock. */ | |
df2c07f4 | 860 | static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c | 861 | struct sk_buff *skb, u32 pid, u32 seq, u32 flags, u8 cmd) |
d6569377 | 862 | { |
37a1300c | 863 | const int skb_orig_len = skb->len; |
d6569377 | 864 | const struct sw_flow_actions *sf_acts; |
df2c07f4 JP |
865 | struct ovs_flow_stats stats; |
866 | struct ovs_header *ovs_header; | |
d6569377 BP |
867 | struct nlattr *nla; |
868 | unsigned long used; | |
869 | u8 tcp_flags; | |
870 | int err; | |
064af421 | 871 | |
d6569377 | 872 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 873 | lockdep_genl_is_held()); |
064af421 | 874 | |
df2c07f4 JP |
875 | ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd); |
876 | if (!ovs_header) | |
37a1300c | 877 | return -EMSGSIZE; |
d6569377 | 878 | |
99769a40 | 879 | ovs_header->dp_ifindex = get_dpifindex(dp); |
d6569377 | 880 | |
df2c07f4 | 881 | nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY); |
d6569377 BP |
882 | if (!nla) |
883 | goto nla_put_failure; | |
884 | err = flow_to_nlattrs(&flow->key, skb); | |
885 | if (err) | |
37a1300c | 886 | goto error; |
d6569377 BP |
887 | nla_nest_end(skb, nla); |
888 | ||
889 | spin_lock_bh(&flow->lock); | |
890 | used = flow->used; | |
891 | stats.n_packets = flow->packet_count; | |
892 | stats.n_bytes = flow->byte_count; | |
893 | tcp_flags = flow->tcp_flags; | |
894 | spin_unlock_bh(&flow->lock); | |
895 | ||
896 | if (used) | |
df2c07f4 | 897 | NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used)); |
d6569377 BP |
898 | |
899 | if (stats.n_packets) | |
df2c07f4 | 900 | NLA_PUT(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats); |
d6569377 BP |
901 | |
902 | if (tcp_flags) | |
df2c07f4 | 903 | NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags); |
d6569377 | 904 | |
df2c07f4 | 905 | /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if |
30053024 BP |
906 | * this is the first flow to be dumped into 'skb'. This is unusual for |
907 | * Netlink but individual action lists can be longer than | |
908 | * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this. | |
909 | * The userspace caller can always fetch the actions separately if it | |
910 | * really wants them. (Most userspace callers in fact don't care.) | |
911 | * | |
912 | * This can only fail for dump operations because the skb is always | |
913 | * properly sized for single flows. | |
914 | */ | |
df2c07f4 | 915 | err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len, |
30053024 BP |
916 | sf_acts->actions); |
917 | if (err < 0 && skb_orig_len) | |
918 | goto error; | |
37a1300c | 919 | |
df2c07f4 | 920 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
921 | |
922 | nla_put_failure: | |
923 | err = -EMSGSIZE; | |
37a1300c | 924 | error: |
df2c07f4 | 925 | genlmsg_cancel(skb, ovs_header); |
d6569377 | 926 | return err; |
44e05eca BP |
927 | } |
928 | ||
df2c07f4 | 929 | static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow) |
44e05eca | 930 | { |
37a1300c BP |
931 | const struct sw_flow_actions *sf_acts; |
932 | int len; | |
d6569377 | 933 | |
37a1300c BP |
934 | sf_acts = rcu_dereference_protected(flow->sf_acts, |
935 | lockdep_genl_is_held()); | |
d6569377 | 936 | |
df2c07f4 JP |
937 | len = nla_total_size(FLOW_BUFSIZE); /* OVS_FLOW_ATTR_KEY */ |
938 | len += nla_total_size(sf_acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */ | |
939 | len += nla_total_size(sizeof(struct ovs_flow_stats)); /* OVS_FLOW_ATTR_STATS */ | |
940 | len += nla_total_size(1); /* OVS_FLOW_ATTR_TCP_FLAGS */ | |
941 | len += nla_total_size(8); /* OVS_FLOW_ATTR_USED */ | |
942 | return genlmsg_new(NLMSG_ALIGN(sizeof(struct ovs_header)) + len, GFP_KERNEL); | |
37a1300c | 943 | } |
8d5ebd83 | 944 | |
df2c07f4 | 945 | static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, struct datapath *dp, |
37a1300c BP |
946 | u32 pid, u32 seq, u8 cmd) |
947 | { | |
948 | struct sk_buff *skb; | |
949 | int retval; | |
d6569377 | 950 | |
df2c07f4 | 951 | skb = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
952 | if (!skb) |
953 | return ERR_PTR(-ENOMEM); | |
d6569377 | 954 | |
df2c07f4 | 955 | retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd); |
37a1300c | 956 | BUG_ON(retval < 0); |
d6569377 | 957 | return skb; |
064af421 BP |
958 | } |
959 | ||
df2c07f4 | 960 | static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 961 | { |
37a1300c | 962 | struct nlattr **a = info->attrs; |
df2c07f4 | 963 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 964 | struct sw_flow_key key; |
d6569377 | 965 | struct sw_flow *flow; |
37a1300c | 966 | struct sk_buff *reply; |
9c52546b | 967 | struct datapath *dp; |
3544358a | 968 | struct flow_table *table; |
bc4a05c6 | 969 | int error; |
76abe283 | 970 | int key_len; |
064af421 | 971 | |
37a1300c BP |
972 | /* Extract key. */ |
973 | error = -EINVAL; | |
df2c07f4 | 974 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 975 | goto error; |
df2c07f4 | 976 | error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
977 | if (error) |
978 | goto error; | |
064af421 | 979 | |
37a1300c | 980 | /* Validate actions. */ |
df2c07f4 | 981 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
4edb9ae9 | 982 | error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0); |
37a1300c BP |
983 | if (error) |
984 | goto error; | |
df2c07f4 | 985 | } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) { |
37a1300c BP |
986 | error = -EINVAL; |
987 | goto error; | |
988 | } | |
989 | ||
df2c07f4 | 990 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 991 | error = -ENODEV; |
9c52546b | 992 | if (!dp) |
37a1300c | 993 | goto error; |
704a1e09 | 994 | |
d6569377 | 995 | table = get_table_protected(dp); |
3544358a PS |
996 | flow = flow_tbl_lookup(table, &key, key_len); |
997 | if (!flow) { | |
d6569377 BP |
998 | struct sw_flow_actions *acts; |
999 | ||
1000 | /* Bail out if we're not allowed to create a new flow. */ | |
1001 | error = -ENOENT; | |
df2c07f4 | 1002 | if (info->genlhdr->cmd == OVS_FLOW_CMD_SET) |
37a1300c | 1003 | goto error; |
d6569377 BP |
1004 | |
1005 | /* Expand table, if necessary, to make room. */ | |
3544358a PS |
1006 | if (flow_tbl_need_to_expand(table)) { |
1007 | struct flow_table *new_table; | |
1008 | ||
1009 | new_table = flow_tbl_expand(table); | |
1010 | if (!IS_ERR(new_table)) { | |
1011 | rcu_assign_pointer(dp->table, new_table); | |
1012 | flow_tbl_deferred_destroy(table); | |
1013 | table = get_table_protected(dp); | |
1014 | } | |
d6569377 BP |
1015 | } |
1016 | ||
1017 | /* Allocate flow. */ | |
1018 | flow = flow_alloc(); | |
1019 | if (IS_ERR(flow)) { | |
1020 | error = PTR_ERR(flow); | |
37a1300c | 1021 | goto error; |
d6569377 | 1022 | } |
37a1300c | 1023 | flow->key = key; |
d6569377 BP |
1024 | clear_stats(flow); |
1025 | ||
1026 | /* Obtain actions. */ | |
df2c07f4 | 1027 | acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1028 | error = PTR_ERR(acts); |
1029 | if (IS_ERR(acts)) | |
1030 | goto error_free_flow; | |
1031 | rcu_assign_pointer(flow->sf_acts, acts); | |
1032 | ||
d6569377 | 1033 | /* Put flow in bucket. */ |
3544358a PS |
1034 | flow->hash = flow_hash(&key, key_len); |
1035 | flow_tbl_insert(table, flow); | |
37a1300c | 1036 | |
df2c07f4 JP |
1037 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1038 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1039 | } else { |
1040 | /* We found a matching flow. */ | |
1041 | struct sw_flow_actions *old_acts; | |
1042 | ||
1043 | /* Bail out if we're not allowed to modify an existing flow. | |
1044 | * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL | |
1045 | * because Generic Netlink treats the latter as a dump | |
1046 | * request. We also accept NLM_F_EXCL in case that bug ever | |
1047 | * gets fixed. | |
1048 | */ | |
1049 | error = -EEXIST; | |
df2c07f4 | 1050 | if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW && |
37a1300c BP |
1051 | info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL)) |
1052 | goto error; | |
d6569377 BP |
1053 | |
1054 | /* Update actions. */ | |
d6569377 | 1055 | old_acts = rcu_dereference_protected(flow->sf_acts, |
ed099e92 | 1056 | lockdep_genl_is_held()); |
df2c07f4 JP |
1057 | if (a[OVS_FLOW_ATTR_ACTIONS] && |
1058 | (old_acts->actions_len != nla_len(a[OVS_FLOW_ATTR_ACTIONS]) || | |
1059 | memcmp(old_acts->actions, nla_data(a[OVS_FLOW_ATTR_ACTIONS]), | |
37a1300c | 1060 | old_acts->actions_len))) { |
d6569377 BP |
1061 | struct sw_flow_actions *new_acts; |
1062 | ||
df2c07f4 | 1063 | new_acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]); |
d6569377 BP |
1064 | error = PTR_ERR(new_acts); |
1065 | if (IS_ERR(new_acts)) | |
37a1300c | 1066 | goto error; |
d6569377 BP |
1067 | |
1068 | rcu_assign_pointer(flow->sf_acts, new_acts); | |
1069 | flow_deferred_free_acts(old_acts); | |
1070 | } | |
1071 | ||
df2c07f4 JP |
1072 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, |
1073 | info->snd_seq, OVS_FLOW_CMD_NEW); | |
d6569377 BP |
1074 | |
1075 | /* Clear stats. */ | |
df2c07f4 | 1076 | if (a[OVS_FLOW_ATTR_CLEAR]) { |
d6569377 BP |
1077 | spin_lock_bh(&flow->lock); |
1078 | clear_stats(flow); | |
1079 | spin_unlock_bh(&flow->lock); | |
1080 | } | |
9c52546b | 1081 | } |
37a1300c BP |
1082 | |
1083 | if (!IS_ERR(reply)) | |
1084 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1085 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1086 | else | |
1087 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1088 | dp_flow_multicast_group.id, PTR_ERR(reply)); | |
d6569377 | 1089 | return 0; |
704a1e09 | 1090 | |
d6569377 BP |
1091 | error_free_flow: |
1092 | flow_put(flow); | |
37a1300c | 1093 | error: |
9c52546b | 1094 | return error; |
704a1e09 BP |
1095 | } |
1096 | ||
df2c07f4 | 1097 | static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info) |
704a1e09 | 1098 | { |
37a1300c | 1099 | struct nlattr **a = info->attrs; |
df2c07f4 | 1100 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1101 | struct sw_flow_key key; |
37a1300c | 1102 | struct sk_buff *reply; |
704a1e09 | 1103 | struct sw_flow *flow; |
9c52546b | 1104 | struct datapath *dp; |
3544358a | 1105 | struct flow_table *table; |
9c52546b | 1106 | int err; |
76abe283 | 1107 | int key_len; |
704a1e09 | 1108 | |
df2c07f4 | 1109 | if (!a[OVS_FLOW_ATTR_KEY]) |
37a1300c | 1110 | return -EINVAL; |
df2c07f4 | 1111 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); |
37a1300c BP |
1112 | if (err) |
1113 | return err; | |
704a1e09 | 1114 | |
df2c07f4 | 1115 | dp = get_dp(ovs_header->dp_ifindex); |
9c52546b | 1116 | if (!dp) |
ed099e92 | 1117 | return -ENODEV; |
704a1e09 | 1118 | |
9c52546b | 1119 | table = get_table_protected(dp); |
3544358a PS |
1120 | flow = flow_tbl_lookup(table, &key, key_len); |
1121 | if (!flow) | |
ed099e92 | 1122 | return -ENOENT; |
d6569377 | 1123 | |
df2c07f4 | 1124 | reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, info->snd_seq, OVS_FLOW_CMD_NEW); |
37a1300c BP |
1125 | if (IS_ERR(reply)) |
1126 | return PTR_ERR(reply); | |
36956a7d | 1127 | |
37a1300c | 1128 | return genlmsg_reply(reply, info); |
d6569377 | 1129 | } |
9c52546b | 1130 | |
df2c07f4 | 1131 | static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1132 | { |
37a1300c | 1133 | struct nlattr **a = info->attrs; |
df2c07f4 | 1134 | struct ovs_header *ovs_header = info->userhdr; |
37a1300c | 1135 | struct sw_flow_key key; |
37a1300c | 1136 | struct sk_buff *reply; |
d6569377 | 1137 | struct sw_flow *flow; |
d6569377 | 1138 | struct datapath *dp; |
3544358a | 1139 | struct flow_table *table; |
d6569377 | 1140 | int err; |
76abe283 | 1141 | int key_len; |
36956a7d | 1142 | |
df2c07f4 JP |
1143 | if (!a[OVS_FLOW_ATTR_KEY]) |
1144 | return flush_flows(ovs_header->dp_ifindex); | |
1145 | err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]); | |
37a1300c BP |
1146 | if (err) |
1147 | return err; | |
d6569377 | 1148 | |
df2c07f4 | 1149 | dp = get_dp(ovs_header->dp_ifindex); |
d6569377 | 1150 | if (!dp) |
37a1300c | 1151 | return -ENODEV; |
d6569377 | 1152 | |
37a1300c | 1153 | table = get_table_protected(dp); |
3544358a PS |
1154 | flow = flow_tbl_lookup(table, &key, key_len); |
1155 | if (!flow) | |
37a1300c | 1156 | return -ENOENT; |
d6569377 | 1157 | |
df2c07f4 | 1158 | reply = ovs_flow_cmd_alloc_info(flow); |
37a1300c BP |
1159 | if (!reply) |
1160 | return -ENOMEM; | |
1161 | ||
3544358a | 1162 | flow_tbl_remove(table, flow); |
37a1300c | 1163 | |
df2c07f4 JP |
1164 | err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid, |
1165 | info->snd_seq, 0, OVS_FLOW_CMD_DEL); | |
37a1300c BP |
1166 | BUG_ON(err < 0); |
1167 | ||
1168 | flow_deferred_free(flow); | |
1169 | ||
1170 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1171 | dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
df2c07f4 | 1175 | static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
37a1300c | 1176 | { |
df2c07f4 | 1177 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
37a1300c BP |
1178 | struct datapath *dp; |
1179 | ||
df2c07f4 | 1180 | dp = get_dp(ovs_header->dp_ifindex); |
37a1300c BP |
1181 | if (!dp) |
1182 | return -ENODEV; | |
1183 | ||
1184 | for (;;) { | |
37a1300c BP |
1185 | struct sw_flow *flow; |
1186 | u32 bucket, obj; | |
1187 | ||
1188 | bucket = cb->args[0]; | |
1189 | obj = cb->args[1]; | |
3544358a PS |
1190 | flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj); |
1191 | if (!flow) | |
37a1300c BP |
1192 | break; |
1193 | ||
df2c07f4 | 1194 | if (ovs_flow_cmd_fill_info(flow, dp, skb, NETLINK_CB(cb->skb).pid, |
37a1300c | 1195 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1196 | OVS_FLOW_CMD_NEW) < 0) |
37a1300c BP |
1197 | break; |
1198 | ||
1199 | cb->args[0] = bucket; | |
1200 | cb->args[1] = obj; | |
1201 | } | |
1202 | return skb->len; | |
704a1e09 BP |
1203 | } |
1204 | ||
37a1300c | 1205 | static struct genl_ops dp_flow_genl_ops[] = { |
df2c07f4 | 1206 | { .cmd = OVS_FLOW_CMD_NEW, |
37a1300c BP |
1207 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1208 | .policy = flow_policy, | |
df2c07f4 | 1209 | .doit = ovs_flow_cmd_new_or_set |
37a1300c | 1210 | }, |
df2c07f4 | 1211 | { .cmd = OVS_FLOW_CMD_DEL, |
37a1300c BP |
1212 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1213 | .policy = flow_policy, | |
df2c07f4 | 1214 | .doit = ovs_flow_cmd_del |
37a1300c | 1215 | }, |
df2c07f4 | 1216 | { .cmd = OVS_FLOW_CMD_GET, |
37a1300c BP |
1217 | .flags = 0, /* OK for unprivileged users. */ |
1218 | .policy = flow_policy, | |
df2c07f4 JP |
1219 | .doit = ovs_flow_cmd_get, |
1220 | .dumpit = ovs_flow_cmd_dump | |
37a1300c | 1221 | }, |
df2c07f4 | 1222 | { .cmd = OVS_FLOW_CMD_SET, |
37a1300c BP |
1223 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1224 | .policy = flow_policy, | |
df2c07f4 | 1225 | .doit = ovs_flow_cmd_new_or_set, |
37a1300c BP |
1226 | }, |
1227 | }; | |
1228 | ||
df2c07f4 | 1229 | static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = { |
aaff4b55 | 1230 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1231 | [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
aaff4b55 | 1232 | #endif |
b063d9f0 | 1233 | [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1234 | [OVS_DP_ATTR_IPV4_FRAGS] = { .type = NLA_U32 }, |
d6569377 BP |
1235 | }; |
1236 | ||
aaff4b55 BP |
1237 | static struct genl_family dp_datapath_genl_family = { |
1238 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1239 | .hdrsize = sizeof(struct ovs_header), |
1240 | .name = OVS_DATAPATH_FAMILY, | |
aaff4b55 | 1241 | .version = 1, |
df2c07f4 | 1242 | .maxattr = OVS_DP_ATTR_MAX |
aaff4b55 BP |
1243 | }; |
1244 | ||
1245 | static struct genl_multicast_group dp_datapath_multicast_group = { | |
df2c07f4 | 1246 | .name = OVS_DATAPATH_MCGROUP |
aaff4b55 BP |
1247 | }; |
1248 | ||
df2c07f4 | 1249 | static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb, |
aaff4b55 | 1250 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1251 | { |
df2c07f4 | 1252 | struct ovs_header *ovs_header; |
d6569377 | 1253 | struct nlattr *nla; |
064af421 BP |
1254 | int err; |
1255 | ||
df2c07f4 | 1256 | ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family, |
aaff4b55 | 1257 | flags, cmd); |
df2c07f4 | 1258 | if (!ovs_header) |
aaff4b55 | 1259 | goto error; |
064af421 | 1260 | |
b063d9f0 | 1261 | ovs_header->dp_ifindex = get_dpifindex(dp); |
064af421 | 1262 | |
d6569377 | 1263 | rcu_read_lock(); |
df2c07f4 | 1264 | err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp)); |
d6569377 | 1265 | rcu_read_unlock(); |
064af421 | 1266 | if (err) |
d6569377 | 1267 | goto nla_put_failure; |
064af421 | 1268 | |
df2c07f4 | 1269 | nla = nla_reserve(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats)); |
d6569377 BP |
1270 | if (!nla) |
1271 | goto nla_put_failure; | |
1272 | get_dp_stats(dp, nla_data(nla)); | |
1273 | ||
df2c07f4 JP |
1274 | NLA_PUT_U32(skb, OVS_DP_ATTR_IPV4_FRAGS, |
1275 | dp->drop_frags ? OVS_DP_FRAG_DROP : OVS_DP_FRAG_ZERO); | |
d6569377 | 1276 | |
df2c07f4 | 1277 | return genlmsg_end(skb, ovs_header); |
d6569377 BP |
1278 | |
1279 | nla_put_failure: | |
df2c07f4 | 1280 | genlmsg_cancel(skb, ovs_header); |
aaff4b55 BP |
1281 | error: |
1282 | return -EMSGSIZE; | |
d6569377 BP |
1283 | } |
1284 | ||
df2c07f4 | 1285 | static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid, |
aaff4b55 | 1286 | u32 seq, u8 cmd) |
d6569377 | 1287 | { |
d6569377 | 1288 | struct sk_buff *skb; |
aaff4b55 | 1289 | int retval; |
d6569377 | 1290 | |
aaff4b55 | 1291 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
064af421 | 1292 | if (!skb) |
d6569377 | 1293 | return ERR_PTR(-ENOMEM); |
659586ef | 1294 | |
df2c07f4 | 1295 | retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd); |
aaff4b55 BP |
1296 | if (retval < 0) { |
1297 | kfree_skb(skb); | |
1298 | return ERR_PTR(retval); | |
1299 | } | |
1300 | return skb; | |
1301 | } | |
9dca7bd5 | 1302 | |
df2c07f4 | 1303 | static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
aaff4b55 | 1304 | { |
df2c07f4 JP |
1305 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) { |
1306 | u32 frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]); | |
9dca7bd5 | 1307 | |
df2c07f4 | 1308 | if (frags != OVS_DP_FRAG_ZERO && frags != OVS_DP_FRAG_DROP) |
aaff4b55 | 1309 | return -EINVAL; |
d6569377 BP |
1310 | } |
1311 | ||
df2c07f4 | 1312 | return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1); |
d6569377 BP |
1313 | } |
1314 | ||
ed099e92 | 1315 | /* Called with genl_mutex and optionally with RTNL lock also. */ |
df2c07f4 | 1316 | static struct datapath *lookup_datapath(struct ovs_header *ovs_header, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1317 | { |
254f2dc8 BP |
1318 | struct datapath *dp; |
1319 | ||
df2c07f4 JP |
1320 | if (!a[OVS_DP_ATTR_NAME]) |
1321 | dp = get_dp(ovs_header->dp_ifindex); | |
254f2dc8 | 1322 | else { |
d6569377 | 1323 | struct vport *vport; |
d6569377 | 1324 | |
057dd6d2 | 1325 | rcu_read_lock(); |
df2c07f4 JP |
1326 | vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME])); |
1327 | dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL; | |
057dd6d2 | 1328 | rcu_read_unlock(); |
d6569377 | 1329 | } |
254f2dc8 | 1330 | return dp ? dp : ERR_PTR(-ENODEV); |
d6569377 BP |
1331 | } |
1332 | ||
ed099e92 | 1333 | /* Called with genl_mutex. */ |
df2c07f4 | 1334 | static void change_datapath(struct datapath *dp, struct nlattr *a[OVS_DP_ATTR_MAX + 1]) |
d6569377 | 1335 | { |
df2c07f4 JP |
1336 | if (a[OVS_DP_ATTR_IPV4_FRAGS]) |
1337 | dp->drop_frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]) == OVS_DP_FRAG_DROP; | |
d6569377 BP |
1338 | } |
1339 | ||
df2c07f4 | 1340 | static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) |
d6569377 | 1341 | { |
aaff4b55 | 1342 | struct nlattr **a = info->attrs; |
d6569377 | 1343 | struct vport_parms parms; |
aaff4b55 | 1344 | struct sk_buff *reply; |
d6569377 BP |
1345 | struct datapath *dp; |
1346 | struct vport *vport; | |
d6569377 | 1347 | int err; |
d6569377 | 1348 | |
d6569377 | 1349 | err = -EINVAL; |
ea36840f | 1350 | if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID]) |
aaff4b55 BP |
1351 | goto err; |
1352 | ||
df2c07f4 | 1353 | err = ovs_dp_cmd_validate(a); |
aaff4b55 BP |
1354 | if (err) |
1355 | goto err; | |
d6569377 BP |
1356 | |
1357 | rtnl_lock(); | |
d6569377 BP |
1358 | err = -ENODEV; |
1359 | if (!try_module_get(THIS_MODULE)) | |
ed099e92 | 1360 | goto err_unlock_rtnl; |
d6569377 | 1361 | |
d6569377 BP |
1362 | err = -ENOMEM; |
1363 | dp = kzalloc(sizeof(*dp), GFP_KERNEL); | |
1364 | if (dp == NULL) | |
1365 | goto err_put_module; | |
1366 | INIT_LIST_HEAD(&dp->port_list); | |
d6569377 BP |
1367 | |
1368 | /* Initialize kobject for bridge. This will be added as | |
1369 | * /sys/class/net/<devname>/brif later, if sysfs is enabled. */ | |
1370 | dp->ifobj.kset = NULL; | |
1371 | kobject_init(&dp->ifobj, &dp_ktype); | |
1372 | ||
1373 | /* Allocate table. */ | |
1374 | err = -ENOMEM; | |
3544358a | 1375 | rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS)); |
d6569377 BP |
1376 | if (!dp->table) |
1377 | goto err_free_dp; | |
1378 | ||
99769a40 JG |
1379 | dp->drop_frags = 0; |
1380 | dp->stats_percpu = alloc_percpu(struct dp_stats_percpu); | |
1381 | if (!dp->stats_percpu) { | |
1382 | err = -ENOMEM; | |
1383 | goto err_destroy_table; | |
1384 | } | |
1385 | ||
1386 | change_datapath(dp, a); | |
1387 | ||
d6569377 | 1388 | /* Set up our datapath device. */ |
df2c07f4 JP |
1389 | parms.name = nla_data(a[OVS_DP_ATTR_NAME]); |
1390 | parms.type = OVS_VPORT_TYPE_INTERNAL; | |
d6569377 BP |
1391 | parms.options = NULL; |
1392 | parms.dp = dp; | |
df2c07f4 | 1393 | parms.port_no = OVSP_LOCAL; |
ea36840f | 1394 | parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]); |
b063d9f0 | 1395 | |
d6569377 BP |
1396 | vport = new_vport(&parms); |
1397 | if (IS_ERR(vport)) { | |
1398 | err = PTR_ERR(vport); | |
1399 | if (err == -EBUSY) | |
1400 | err = -EEXIST; | |
1401 | ||
99769a40 | 1402 | goto err_destroy_percpu; |
d6569377 | 1403 | } |
d6569377 | 1404 | |
df2c07f4 | 1405 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1406 | err = PTR_ERR(reply); |
1407 | if (IS_ERR(reply)) | |
1408 | goto err_destroy_local_port; | |
1409 | ||
254f2dc8 | 1410 | list_add_tail(&dp->list_node, &dps); |
d6569377 BP |
1411 | dp_sysfs_add_dp(dp); |
1412 | ||
d6569377 BP |
1413 | rtnl_unlock(); |
1414 | ||
aaff4b55 BP |
1415 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1416 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
d6569377 BP |
1417 | return 0; |
1418 | ||
1419 | err_destroy_local_port: | |
df2c07f4 | 1420 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
99769a40 JG |
1421 | err_destroy_percpu: |
1422 | free_percpu(dp->stats_percpu); | |
d6569377 | 1423 | err_destroy_table: |
3544358a | 1424 | flow_tbl_destroy(get_table_protected(dp)); |
d6569377 | 1425 | err_free_dp: |
d6569377 BP |
1426 | kfree(dp); |
1427 | err_put_module: | |
1428 | module_put(THIS_MODULE); | |
ed099e92 | 1429 | err_unlock_rtnl: |
d6569377 | 1430 | rtnl_unlock(); |
d6569377 | 1431 | err: |
064af421 BP |
1432 | return err; |
1433 | } | |
1434 | ||
df2c07f4 | 1435 | static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1436 | { |
ed099e92 | 1437 | struct vport *vport, *next_vport; |
aaff4b55 | 1438 | struct sk_buff *reply; |
9c52546b | 1439 | struct datapath *dp; |
d6569377 | 1440 | int err; |
44e05eca | 1441 | |
df2c07f4 | 1442 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 | 1443 | if (err) |
d6569377 | 1444 | goto exit; |
44e05eca | 1445 | |
d6569377 | 1446 | rtnl_lock(); |
aaff4b55 | 1447 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 BP |
1448 | err = PTR_ERR(dp); |
1449 | if (IS_ERR(dp)) | |
aaff4b55 BP |
1450 | goto exit_unlock; |
1451 | ||
df2c07f4 | 1452 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_DEL); |
aaff4b55 BP |
1453 | err = PTR_ERR(reply); |
1454 | if (IS_ERR(reply)) | |
1455 | goto exit_unlock; | |
9c52546b | 1456 | |
ed099e92 | 1457 | list_for_each_entry_safe (vport, next_vport, &dp->port_list, node) |
df2c07f4 | 1458 | if (vport->port_no != OVSP_LOCAL) |
ed099e92 BP |
1459 | dp_detach_port(vport); |
1460 | ||
1461 | dp_sysfs_del_dp(dp); | |
254f2dc8 | 1462 | list_del(&dp->list_node); |
df2c07f4 | 1463 | dp_detach_port(get_vport_protected(dp, OVSP_LOCAL)); |
ed099e92 | 1464 | |
99620d2c JG |
1465 | /* rtnl_unlock() will wait until all the references to devices that |
1466 | * are pending unregistration have been dropped. We do it here to | |
1467 | * ensure that any internal devices (which contain DP pointers) are | |
1468 | * fully destroyed before freeing the datapath. | |
1469 | */ | |
1470 | rtnl_unlock(); | |
1471 | ||
ed099e92 BP |
1472 | call_rcu(&dp->rcu, destroy_dp_rcu); |
1473 | module_put(THIS_MODULE); | |
1474 | ||
aaff4b55 BP |
1475 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1476 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
99620d2c JG |
1477 | |
1478 | return 0; | |
d6569377 | 1479 | |
aaff4b55 | 1480 | exit_unlock: |
d6569377 BP |
1481 | rtnl_unlock(); |
1482 | exit: | |
1483 | return err; | |
44e05eca BP |
1484 | } |
1485 | ||
df2c07f4 | 1486 | static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info) |
064af421 | 1487 | { |
aaff4b55 | 1488 | struct sk_buff *reply; |
d6569377 | 1489 | struct datapath *dp; |
d6569377 | 1490 | int err; |
064af421 | 1491 | |
df2c07f4 | 1492 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1493 | if (err) |
1494 | return err; | |
38c6ecbc | 1495 | |
aaff4b55 | 1496 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1497 | if (IS_ERR(dp)) |
aaff4b55 | 1498 | return PTR_ERR(dp); |
38c6ecbc | 1499 | |
aaff4b55 | 1500 | change_datapath(dp, info->attrs); |
38c6ecbc | 1501 | |
df2c07f4 | 1502 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1503 | if (IS_ERR(reply)) { |
1504 | err = PTR_ERR(reply); | |
1505 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1506 | dp_datapath_multicast_group.id, err); | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1511 | dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1512 | return 0; | |
064af421 BP |
1513 | } |
1514 | ||
df2c07f4 | 1515 | static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info) |
1dcf111b | 1516 | { |
aaff4b55 | 1517 | struct sk_buff *reply; |
d6569377 | 1518 | struct datapath *dp; |
d6569377 | 1519 | int err; |
1dcf111b | 1520 | |
df2c07f4 | 1521 | err = ovs_dp_cmd_validate(info->attrs); |
aaff4b55 BP |
1522 | if (err) |
1523 | return err; | |
1dcf111b | 1524 | |
aaff4b55 | 1525 | dp = lookup_datapath(info->userhdr, info->attrs); |
d6569377 | 1526 | if (IS_ERR(dp)) |
aaff4b55 | 1527 | return PTR_ERR(dp); |
1dcf111b | 1528 | |
df2c07f4 | 1529 | reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW); |
aaff4b55 BP |
1530 | if (IS_ERR(reply)) |
1531 | return PTR_ERR(reply); | |
1532 | ||
1533 | return genlmsg_reply(reply, info); | |
1dcf111b JP |
1534 | } |
1535 | ||
df2c07f4 | 1536 | static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
a7786963 | 1537 | { |
254f2dc8 BP |
1538 | struct datapath *dp; |
1539 | int skip = cb->args[0]; | |
1540 | int i = 0; | |
a7786963 | 1541 | |
254f2dc8 BP |
1542 | list_for_each_entry (dp, &dps, list_node) { |
1543 | if (i < skip) | |
d6569377 | 1544 | continue; |
df2c07f4 | 1545 | if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid, |
aaff4b55 | 1546 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1547 | OVS_DP_CMD_NEW) < 0) |
aaff4b55 | 1548 | break; |
254f2dc8 | 1549 | i++; |
a7786963 | 1550 | } |
aaff4b55 | 1551 | |
254f2dc8 BP |
1552 | cb->args[0] = i; |
1553 | ||
aaff4b55 | 1554 | return skb->len; |
c19e6535 BP |
1555 | } |
1556 | ||
aaff4b55 | 1557 | static struct genl_ops dp_datapath_genl_ops[] = { |
df2c07f4 | 1558 | { .cmd = OVS_DP_CMD_NEW, |
aaff4b55 BP |
1559 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1560 | .policy = datapath_policy, | |
df2c07f4 | 1561 | .doit = ovs_dp_cmd_new |
aaff4b55 | 1562 | }, |
df2c07f4 | 1563 | { .cmd = OVS_DP_CMD_DEL, |
aaff4b55 BP |
1564 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1565 | .policy = datapath_policy, | |
df2c07f4 | 1566 | .doit = ovs_dp_cmd_del |
aaff4b55 | 1567 | }, |
df2c07f4 | 1568 | { .cmd = OVS_DP_CMD_GET, |
aaff4b55 BP |
1569 | .flags = 0, /* OK for unprivileged users. */ |
1570 | .policy = datapath_policy, | |
df2c07f4 JP |
1571 | .doit = ovs_dp_cmd_get, |
1572 | .dumpit = ovs_dp_cmd_dump | |
aaff4b55 | 1573 | }, |
df2c07f4 | 1574 | { .cmd = OVS_DP_CMD_SET, |
aaff4b55 BP |
1575 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1576 | .policy = datapath_policy, | |
df2c07f4 | 1577 | .doit = ovs_dp_cmd_set, |
aaff4b55 BP |
1578 | }, |
1579 | }; | |
1580 | ||
df2c07f4 | 1581 | static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = { |
f0fef760 | 1582 | #ifdef HAVE_NLA_NUL_STRING |
df2c07f4 | 1583 | [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 }, |
f613a0d7 | 1584 | [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1585 | [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN }, |
f0fef760 | 1586 | #else |
f613a0d7 | 1587 | [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) }, |
df2c07f4 | 1588 | [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN }, |
f0fef760 | 1589 | #endif |
d48c88ec JG |
1590 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 }, |
1591 | [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 }, | |
b063d9f0 | 1592 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 }, |
df2c07f4 | 1593 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED }, |
c19e6535 BP |
1594 | }; |
1595 | ||
f0fef760 BP |
1596 | static struct genl_family dp_vport_genl_family = { |
1597 | .id = GENL_ID_GENERATE, | |
df2c07f4 JP |
1598 | .hdrsize = sizeof(struct ovs_header), |
1599 | .name = OVS_VPORT_FAMILY, | |
f0fef760 | 1600 | .version = 1, |
df2c07f4 | 1601 | .maxattr = OVS_VPORT_ATTR_MAX |
f0fef760 BP |
1602 | }; |
1603 | ||
f14d8083 | 1604 | struct genl_multicast_group dp_vport_multicast_group = { |
df2c07f4 | 1605 | .name = OVS_VPORT_MCGROUP |
f0fef760 BP |
1606 | }; |
1607 | ||
1608 | /* Called with RTNL lock or RCU read lock. */ | |
df2c07f4 | 1609 | static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb, |
f0fef760 | 1610 | u32 pid, u32 seq, u32 flags, u8 cmd) |
064af421 | 1611 | { |
df2c07f4 | 1612 | struct ovs_header *ovs_header; |
c19e6535 | 1613 | struct nlattr *nla; |
c19e6535 BP |
1614 | int err; |
1615 | ||
df2c07f4 | 1616 | ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family, |
f0fef760 | 1617 | flags, cmd); |
df2c07f4 | 1618 | if (!ovs_header) |
f0fef760 | 1619 | return -EMSGSIZE; |
c19e6535 | 1620 | |
99769a40 | 1621 | ovs_header->dp_ifindex = get_dpifindex(vport->dp); |
c19e6535 | 1622 | |
df2c07f4 JP |
1623 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
1624 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport_get_type(vport)); | |
1625 | NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport_get_name(vport)); | |
b063d9f0 | 1626 | NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid); |
c19e6535 | 1627 | |
f613a0d7 | 1628 | nla = nla_reserve(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats)); |
c19e6535 BP |
1629 | if (!nla) |
1630 | goto nla_put_failure; | |
f613a0d7 PS |
1631 | |
1632 | vport_get_stats(vport, nla_data(nla)); | |
c19e6535 | 1633 | |
df2c07f4 | 1634 | NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, vport_get_addr(vport)); |
c19e6535 | 1635 | |
c19e6535 | 1636 | err = vport_get_options(vport, skb); |
f0fef760 BP |
1637 | if (err == -EMSGSIZE) |
1638 | goto error; | |
c19e6535 | 1639 | |
df2c07f4 | 1640 | return genlmsg_end(skb, ovs_header); |
c19e6535 BP |
1641 | |
1642 | nla_put_failure: | |
1643 | err = -EMSGSIZE; | |
f0fef760 | 1644 | error: |
df2c07f4 | 1645 | genlmsg_cancel(skb, ovs_header); |
f0fef760 | 1646 | return err; |
064af421 BP |
1647 | } |
1648 | ||
f0fef760 | 1649 | /* Called with RTNL lock or RCU read lock. */ |
f14d8083 EJ |
1650 | struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid, |
1651 | u32 seq, u8 cmd) | |
064af421 | 1652 | { |
c19e6535 | 1653 | struct sk_buff *skb; |
f0fef760 | 1654 | int retval; |
c19e6535 | 1655 | |
f0fef760 | 1656 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
c19e6535 BP |
1657 | if (!skb) |
1658 | return ERR_PTR(-ENOMEM); | |
1659 | ||
df2c07f4 | 1660 | retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd); |
f0fef760 BP |
1661 | if (retval < 0) { |
1662 | kfree_skb(skb); | |
1663 | return ERR_PTR(retval); | |
1664 | } | |
c19e6535 | 1665 | return skb; |
f0fef760 | 1666 | } |
c19e6535 | 1667 | |
df2c07f4 | 1668 | static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
f0fef760 | 1669 | { |
df2c07f4 | 1670 | return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1); |
c19e6535 | 1671 | } |
51d4d598 | 1672 | |
ed099e92 | 1673 | /* Called with RTNL lock or RCU read lock. */ |
df2c07f4 JP |
1674 | static struct vport *lookup_vport(struct ovs_header *ovs_header, |
1675 | struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) | |
c19e6535 BP |
1676 | { |
1677 | struct datapath *dp; | |
1678 | struct vport *vport; | |
1679 | ||
df2c07f4 JP |
1680 | if (a[OVS_VPORT_ATTR_NAME]) { |
1681 | vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME])); | |
ed099e92 | 1682 | if (!vport) |
c19e6535 | 1683 | return ERR_PTR(-ENODEV); |
c19e6535 | 1684 | return vport; |
df2c07f4 JP |
1685 | } else if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1686 | u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1687 | |
1688 | if (port_no >= DP_MAX_PORTS) | |
f0fef760 | 1689 | return ERR_PTR(-EFBIG); |
c19e6535 | 1690 | |
df2c07f4 | 1691 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1692 | if (!dp) |
1693 | return ERR_PTR(-ENODEV); | |
f2459fe7 | 1694 | |
c19e6535 | 1695 | vport = get_vport_protected(dp, port_no); |
ed099e92 | 1696 | if (!vport) |
c19e6535 | 1697 | return ERR_PTR(-ENOENT); |
c19e6535 BP |
1698 | return vport; |
1699 | } else | |
1700 | return ERR_PTR(-EINVAL); | |
064af421 BP |
1701 | } |
1702 | ||
ed099e92 | 1703 | /* Called with RTNL lock. */ |
df2c07f4 | 1704 | static int change_vport(struct vport *vport, struct nlattr *a[OVS_VPORT_ATTR_MAX + 1]) |
064af421 | 1705 | { |
c19e6535 | 1706 | int err = 0; |
f613a0d7 | 1707 | |
df2c07f4 | 1708 | if (a[OVS_VPORT_ATTR_STATS]) |
f613a0d7 PS |
1709 | vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS])); |
1710 | ||
1711 | if (a[OVS_VPORT_ATTR_ADDRESS]) | |
df2c07f4 | 1712 | err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS])); |
f613a0d7 | 1713 | |
c19e6535 BP |
1714 | return err; |
1715 | } | |
1716 | ||
df2c07f4 | 1717 | static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info) |
c19e6535 | 1718 | { |
f0fef760 | 1719 | struct nlattr **a = info->attrs; |
df2c07f4 | 1720 | struct ovs_header *ovs_header = info->userhdr; |
c19e6535 | 1721 | struct vport_parms parms; |
ed099e92 | 1722 | struct sk_buff *reply; |
c19e6535 | 1723 | struct vport *vport; |
c19e6535 | 1724 | struct datapath *dp; |
b0ec0f27 | 1725 | u32 port_no; |
c19e6535 | 1726 | int err; |
b0ec0f27 | 1727 | |
c19e6535 | 1728 | err = -EINVAL; |
ea36840f BP |
1729 | if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] || |
1730 | !a[OVS_VPORT_ATTR_UPCALL_PID]) | |
f0fef760 BP |
1731 | goto exit; |
1732 | ||
df2c07f4 | 1733 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1734 | if (err) |
1735 | goto exit; | |
51d4d598 | 1736 | |
c19e6535 | 1737 | rtnl_lock(); |
df2c07f4 | 1738 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 BP |
1739 | err = -ENODEV; |
1740 | if (!dp) | |
ed099e92 | 1741 | goto exit_unlock; |
c19e6535 | 1742 | |
df2c07f4 JP |
1743 | if (a[OVS_VPORT_ATTR_PORT_NO]) { |
1744 | port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
c19e6535 BP |
1745 | |
1746 | err = -EFBIG; | |
1747 | if (port_no >= DP_MAX_PORTS) | |
ed099e92 | 1748 | goto exit_unlock; |
c19e6535 BP |
1749 | |
1750 | vport = get_vport_protected(dp, port_no); | |
1751 | err = -EBUSY; | |
1752 | if (vport) | |
ed099e92 | 1753 | goto exit_unlock; |
c19e6535 BP |
1754 | } else { |
1755 | for (port_no = 1; ; port_no++) { | |
1756 | if (port_no >= DP_MAX_PORTS) { | |
1757 | err = -EFBIG; | |
ed099e92 | 1758 | goto exit_unlock; |
c19e6535 BP |
1759 | } |
1760 | vport = get_vport_protected(dp, port_no); | |
1761 | if (!vport) | |
1762 | break; | |
51d4d598 | 1763 | } |
064af421 | 1764 | } |
b0ec0f27 | 1765 | |
df2c07f4 JP |
1766 | parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]); |
1767 | parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1768 | parms.options = a[OVS_VPORT_ATTR_OPTIONS]; | |
c19e6535 BP |
1769 | parms.dp = dp; |
1770 | parms.port_no = port_no; | |
ea36840f | 1771 | parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); |
c19e6535 BP |
1772 | |
1773 | vport = new_vport(&parms); | |
1774 | err = PTR_ERR(vport); | |
1775 | if (IS_ERR(vport)) | |
ed099e92 | 1776 | goto exit_unlock; |
c19e6535 | 1777 | |
c19e6535 BP |
1778 | dp_sysfs_add_if(vport); |
1779 | ||
1780 | err = change_vport(vport, a); | |
f0fef760 | 1781 | if (!err) { |
df2c07f4 JP |
1782 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, |
1783 | info->snd_seq, OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1784 | if (IS_ERR(reply)) |
1785 | err = PTR_ERR(reply); | |
1786 | } | |
c19e6535 BP |
1787 | if (err) { |
1788 | dp_detach_port(vport); | |
ed099e92 | 1789 | goto exit_unlock; |
c19e6535 | 1790 | } |
f0fef760 BP |
1791 | genl_notify(reply, genl_info_net(info), info->snd_pid, |
1792 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
c19e6535 | 1793 | |
c19e6535 | 1794 | |
ed099e92 | 1795 | exit_unlock: |
c19e6535 | 1796 | rtnl_unlock(); |
c19e6535 BP |
1797 | exit: |
1798 | return err; | |
44e05eca BP |
1799 | } |
1800 | ||
df2c07f4 | 1801 | static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) |
44e05eca | 1802 | { |
f0fef760 BP |
1803 | struct nlattr **a = info->attrs; |
1804 | struct sk_buff *reply; | |
c19e6535 | 1805 | struct vport *vport; |
c19e6535 | 1806 | int err; |
44e05eca | 1807 | |
df2c07f4 | 1808 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1809 | if (err) |
c19e6535 BP |
1810 | goto exit; |
1811 | ||
1812 | rtnl_lock(); | |
f0fef760 | 1813 | vport = lookup_vport(info->userhdr, a); |
c19e6535 BP |
1814 | err = PTR_ERR(vport); |
1815 | if (IS_ERR(vport)) | |
f0fef760 | 1816 | goto exit_unlock; |
44e05eca | 1817 | |
c19e6535 | 1818 | err = 0; |
4879d4c7 BP |
1819 | if (a[OVS_VPORT_ATTR_TYPE] && nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport_get_type(vport)) |
1820 | err = -EINVAL; | |
1821 | if (!err && a[OVS_VPORT_ATTR_OPTIONS]) | |
df2c07f4 | 1822 | err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); |
c19e6535 BP |
1823 | if (!err) |
1824 | err = change_vport(vport, a); | |
b063d9f0 JG |
1825 | if (!err && a[OVS_VPORT_ATTR_UPCALL_PID]) |
1826 | vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
c19e6535 | 1827 | |
df2c07f4 JP |
1828 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1829 | OVS_VPORT_CMD_NEW); | |
f0fef760 BP |
1830 | if (IS_ERR(reply)) { |
1831 | err = PTR_ERR(reply); | |
1832 | netlink_set_err(INIT_NET_GENL_SOCK, 0, | |
1833 | dp_vport_multicast_group.id, err); | |
1834 | return 0; | |
1835 | } | |
1836 | ||
1837 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1838 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1839 | ||
1840 | exit_unlock: | |
c19e6535 BP |
1841 | rtnl_unlock(); |
1842 | exit: | |
1843 | return err; | |
064af421 BP |
1844 | } |
1845 | ||
df2c07f4 | 1846 | static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1847 | { |
f0fef760 BP |
1848 | struct nlattr **a = info->attrs; |
1849 | struct sk_buff *reply; | |
c19e6535 | 1850 | struct vport *vport; |
c19e6535 BP |
1851 | int err; |
1852 | ||
df2c07f4 | 1853 | err = ovs_vport_cmd_validate(a); |
f0fef760 | 1854 | if (err) |
c19e6535 BP |
1855 | goto exit; |
1856 | ||
1857 | rtnl_lock(); | |
f0fef760 | 1858 | vport = lookup_vport(info->userhdr, a); |
c19e6535 | 1859 | err = PTR_ERR(vport); |
f0fef760 BP |
1860 | if (IS_ERR(vport)) |
1861 | goto exit_unlock; | |
c19e6535 | 1862 | |
df2c07f4 | 1863 | if (vport->port_no == OVSP_LOCAL) { |
f0fef760 BP |
1864 | err = -EINVAL; |
1865 | goto exit_unlock; | |
1866 | } | |
1867 | ||
df2c07f4 JP |
1868 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1869 | OVS_VPORT_CMD_DEL); | |
f0fef760 BP |
1870 | err = PTR_ERR(reply); |
1871 | if (IS_ERR(reply)) | |
1872 | goto exit_unlock; | |
1873 | ||
3544358a | 1874 | dp_detach_port(vport); |
f0fef760 BP |
1875 | |
1876 | genl_notify(reply, genl_info_net(info), info->snd_pid, | |
1877 | dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL); | |
1878 | ||
1879 | exit_unlock: | |
c19e6535 BP |
1880 | rtnl_unlock(); |
1881 | exit: | |
1882 | return err; | |
7c40efc9 BP |
1883 | } |
1884 | ||
df2c07f4 | 1885 | static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info) |
7c40efc9 | 1886 | { |
f0fef760 | 1887 | struct nlattr **a = info->attrs; |
df2c07f4 | 1888 | struct ovs_header *ovs_header = info->userhdr; |
ed099e92 | 1889 | struct sk_buff *reply; |
c19e6535 | 1890 | struct vport *vport; |
c19e6535 BP |
1891 | int err; |
1892 | ||
df2c07f4 | 1893 | err = ovs_vport_cmd_validate(a); |
f0fef760 BP |
1894 | if (err) |
1895 | goto exit; | |
c19e6535 | 1896 | |
ed099e92 | 1897 | rcu_read_lock(); |
df2c07f4 | 1898 | vport = lookup_vport(ovs_header, a); |
c19e6535 BP |
1899 | err = PTR_ERR(vport); |
1900 | if (IS_ERR(vport)) | |
f0fef760 | 1901 | goto exit_unlock; |
c19e6535 | 1902 | |
df2c07f4 JP |
1903 | reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq, |
1904 | OVS_VPORT_CMD_NEW); | |
ed099e92 BP |
1905 | err = PTR_ERR(reply); |
1906 | if (IS_ERR(reply)) | |
f0fef760 | 1907 | goto exit_unlock; |
ed099e92 | 1908 | |
df2fa9b5 JG |
1909 | rcu_read_unlock(); |
1910 | ||
1911 | return genlmsg_reply(reply, info); | |
ed099e92 | 1912 | |
f0fef760 | 1913 | exit_unlock: |
ed099e92 | 1914 | rcu_read_unlock(); |
f0fef760 | 1915 | exit: |
c19e6535 BP |
1916 | return err; |
1917 | } | |
1918 | ||
df2c07f4 | 1919 | static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) |
c19e6535 | 1920 | { |
df2c07f4 | 1921 | struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh)); |
c19e6535 BP |
1922 | struct datapath *dp; |
1923 | u32 port_no; | |
f0fef760 | 1924 | int retval; |
c19e6535 | 1925 | |
df2c07f4 | 1926 | dp = get_dp(ovs_header->dp_ifindex); |
c19e6535 | 1927 | if (!dp) |
f0fef760 | 1928 | return -ENODEV; |
ed099e92 BP |
1929 | |
1930 | rcu_read_lock(); | |
f0fef760 | 1931 | for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) { |
ed099e92 | 1932 | struct vport *vport; |
ed099e92 BP |
1933 | |
1934 | vport = get_vport_protected(dp, port_no); | |
1935 | if (!vport) | |
1936 | continue; | |
1937 | ||
df2c07f4 | 1938 | if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid, |
f0fef760 | 1939 | cb->nlh->nlmsg_seq, NLM_F_MULTI, |
df2c07f4 | 1940 | OVS_VPORT_CMD_NEW) < 0) |
f0fef760 | 1941 | break; |
c19e6535 | 1942 | } |
ed099e92 | 1943 | rcu_read_unlock(); |
c19e6535 | 1944 | |
f0fef760 BP |
1945 | cb->args[0] = port_no; |
1946 | retval = skb->len; | |
1947 | ||
1948 | return retval; | |
7c40efc9 BP |
1949 | } |
1950 | ||
f0fef760 | 1951 | static struct genl_ops dp_vport_genl_ops[] = { |
df2c07f4 | 1952 | { .cmd = OVS_VPORT_CMD_NEW, |
f0fef760 BP |
1953 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1954 | .policy = vport_policy, | |
df2c07f4 | 1955 | .doit = ovs_vport_cmd_new |
f0fef760 | 1956 | }, |
df2c07f4 | 1957 | { .cmd = OVS_VPORT_CMD_DEL, |
f0fef760 BP |
1958 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1959 | .policy = vport_policy, | |
df2c07f4 | 1960 | .doit = ovs_vport_cmd_del |
f0fef760 | 1961 | }, |
df2c07f4 | 1962 | { .cmd = OVS_VPORT_CMD_GET, |
f0fef760 BP |
1963 | .flags = 0, /* OK for unprivileged users. */ |
1964 | .policy = vport_policy, | |
df2c07f4 JP |
1965 | .doit = ovs_vport_cmd_get, |
1966 | .dumpit = ovs_vport_cmd_dump | |
f0fef760 | 1967 | }, |
df2c07f4 | 1968 | { .cmd = OVS_VPORT_CMD_SET, |
f0fef760 BP |
1969 | .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */ |
1970 | .policy = vport_policy, | |
df2c07f4 | 1971 | .doit = ovs_vport_cmd_set, |
f0fef760 BP |
1972 | }, |
1973 | }; | |
1974 | ||
982b8810 BP |
1975 | struct genl_family_and_ops { |
1976 | struct genl_family *family; | |
1977 | struct genl_ops *ops; | |
1978 | int n_ops; | |
1979 | struct genl_multicast_group *group; | |
1980 | }; | |
ed099e92 | 1981 | |
982b8810 | 1982 | static const struct genl_family_and_ops dp_genl_families[] = { |
aaff4b55 BP |
1983 | { &dp_datapath_genl_family, |
1984 | dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops), | |
1985 | &dp_datapath_multicast_group }, | |
f0fef760 BP |
1986 | { &dp_vport_genl_family, |
1987 | dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops), | |
1988 | &dp_vport_multicast_group }, | |
37a1300c BP |
1989 | { &dp_flow_genl_family, |
1990 | dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops), | |
1991 | &dp_flow_multicast_group }, | |
982b8810 BP |
1992 | { &dp_packet_genl_family, |
1993 | dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops), | |
1994 | NULL }, | |
1995 | }; | |
ed099e92 | 1996 | |
982b8810 BP |
1997 | static void dp_unregister_genl(int n_families) |
1998 | { | |
1999 | int i; | |
ed099e92 | 2000 | |
b867ca75 | 2001 | for (i = 0; i < n_families; i++) |
982b8810 | 2002 | genl_unregister_family(dp_genl_families[i].family); |
ed099e92 BP |
2003 | } |
2004 | ||
982b8810 | 2005 | static int dp_register_genl(void) |
064af421 | 2006 | { |
982b8810 BP |
2007 | int n_registered; |
2008 | int err; | |
2009 | int i; | |
064af421 | 2010 | |
982b8810 BP |
2011 | n_registered = 0; |
2012 | for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) { | |
2013 | const struct genl_family_and_ops *f = &dp_genl_families[i]; | |
064af421 | 2014 | |
982b8810 BP |
2015 | err = genl_register_family_with_ops(f->family, f->ops, |
2016 | f->n_ops); | |
2017 | if (err) | |
2018 | goto error; | |
2019 | n_registered++; | |
e22d4953 | 2020 | |
982b8810 BP |
2021 | if (f->group) { |
2022 | err = genl_register_mc_group(f->family, f->group); | |
2023 | if (err) | |
2024 | goto error; | |
2025 | } | |
2026 | } | |
9cc8b4e4 | 2027 | |
982b8810 | 2028 | return 0; |
064af421 BP |
2029 | |
2030 | error: | |
982b8810 BP |
2031 | dp_unregister_genl(n_registered); |
2032 | return err; | |
064af421 BP |
2033 | } |
2034 | ||
22d24ebf BP |
2035 | static int __init dp_init(void) |
2036 | { | |
f2459fe7 | 2037 | struct sk_buff *dummy_skb; |
22d24ebf BP |
2038 | int err; |
2039 | ||
f2459fe7 | 2040 | BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb)); |
22d24ebf | 2041 | |
f2459fe7 | 2042 | printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR); |
064af421 | 2043 | |
3544358a | 2044 | err = tnl_init(); |
064af421 BP |
2045 | if (err) |
2046 | goto error; | |
2047 | ||
3544358a PS |
2048 | err = flow_init(); |
2049 | if (err) | |
2050 | goto error_tnl_exit; | |
2051 | ||
f2459fe7 | 2052 | err = vport_init(); |
064af421 BP |
2053 | if (err) |
2054 | goto error_flow_exit; | |
2055 | ||
f2459fe7 JG |
2056 | err = register_netdevice_notifier(&dp_device_notifier); |
2057 | if (err) | |
2058 | goto error_vport_exit; | |
2059 | ||
982b8810 BP |
2060 | err = dp_register_genl(); |
2061 | if (err < 0) | |
37a1300c | 2062 | goto error_unreg_notifier; |
982b8810 | 2063 | |
064af421 BP |
2064 | return 0; |
2065 | ||
2066 | error_unreg_notifier: | |
2067 | unregister_netdevice_notifier(&dp_device_notifier); | |
f2459fe7 JG |
2068 | error_vport_exit: |
2069 | vport_exit(); | |
064af421 BP |
2070 | error_flow_exit: |
2071 | flow_exit(); | |
3544358a PS |
2072 | error_tnl_exit: |
2073 | tnl_exit(); | |
064af421 BP |
2074 | error: |
2075 | return err; | |
2076 | } | |
2077 | ||
2078 | static void dp_cleanup(void) | |
2079 | { | |
2080 | rcu_barrier(); | |
982b8810 | 2081 | dp_unregister_genl(ARRAY_SIZE(dp_genl_families)); |
064af421 | 2082 | unregister_netdevice_notifier(&dp_device_notifier); |
f2459fe7 | 2083 | vport_exit(); |
064af421 | 2084 | flow_exit(); |
3544358a | 2085 | tnl_exit(); |
064af421 BP |
2086 | } |
2087 | ||
2088 | module_init(dp_init); | |
2089 | module_exit(dp_cleanup); | |
2090 | ||
2091 | MODULE_DESCRIPTION("Open vSwitch switching datapath"); | |
2092 | MODULE_LICENSE("GPL"); |