2 * Copyright (c) 2007-2011 Nicira Networks.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/if_vlan.h>
27 #include <linux/jhash.h>
28 #include <linux/delay.h>
29 #include <linux/time.h>
30 #include <linux/etherdevice.h>
31 #include <linux/genetlink.h>
32 #include <linux/kernel.h>
33 #include <linux/kthread.h>
34 #include <linux/mutex.h>
35 #include <linux/percpu.h>
36 #include <linux/rcupdate.h>
37 #include <linux/tcp.h>
38 #include <linux/udp.h>
39 #include <linux/version.h>
40 #include <linux/ethtool.h>
41 #include <linux/wait.h>
42 #include <asm/system.h>
43 #include <asm/div64.h>
44 #include <linux/highmem.h>
45 #include <linux/netfilter_bridge.h>
46 #include <linux/netfilter_ipv4.h>
47 #include <linux/inetdevice.h>
48 #include <linux/list.h>
49 #include <linux/openvswitch.h>
50 #include <linux/rculist.h>
51 #include <linux/dmi.h>
52 #include <net/genetlink.h>
59 #include "vport-internal_dev.h"
61 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
62 LINUX_VERSION_CODE > KERNEL_VERSION(3,2,0)
63 #error Kernels before 2.6.18 or after 3.2 are not supported by this version of Open vSwitch.
66 int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
67 EXPORT_SYMBOL(dp_ioctl_hook);
72 * Writes to device state (add/remove datapath, port, set operations on vports,
73 * etc.) are protected by RTNL.
75 * Writes to other state (flow table modifications, set miscellaneous datapath
76 * parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside
79 * Reads are protected by RCU.
81 * There are a few special cases (mostly stats) that have their own
82 * synchronization but they nest under all of above and don't interact with
86 /* Global list of datapaths to enable dumping them all out.
87 * Protected by genl_mutex.
89 static LIST_HEAD(dps);
91 static struct vport *new_vport(const struct vport_parms *);
92 static int queue_gso_packets(int dp_ifindex, struct sk_buff *,
93 const struct dp_upcall_info *);
94 static int queue_userspace_packet(int dp_ifindex, struct sk_buff *,
95 const struct dp_upcall_info *);
97 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
98 static struct datapath *get_dp(int dp_ifindex)
100 struct datapath *dp = NULL;
101 struct net_device *dev;
104 dev = dev_get_by_index_rcu(&init_net, dp_ifindex);
106 struct vport *vport = internal_dev_get_vport(dev);
115 /* Must be called with genl_mutex. */
116 static struct flow_table *get_table_protected(struct datapath *dp)
118 return rcu_dereference_protected(dp->table, lockdep_genl_is_held());
121 /* Must be called with rcu_read_lock or RTNL lock. */
122 static struct vport *get_vport_protected(struct datapath *dp, u16 port_no)
124 return rcu_dereference_rtnl(dp->ports[port_no]);
127 /* Must be called with rcu_read_lock or RTNL lock. */
128 const char *dp_name(const struct datapath *dp)
130 struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]);
131 return vport->ops->get_name(vport);
134 static int get_dpifindex(struct datapath *dp)
141 local = get_vport_protected(dp, OVSP_LOCAL);
143 ifindex = local->ops->get_ifindex(local);
152 static size_t br_nlmsg_size(void)
154 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
155 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
156 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
157 + nla_total_size(4) /* IFLA_MASTER */
158 + nla_total_size(4) /* IFLA_MTU */
159 + nla_total_size(1); /* IFLA_OPERSTATE */
162 /* Caller must hold RTNL lock. */
163 static int dp_fill_ifinfo(struct sk_buff *skb,
164 const struct vport *port,
165 int event, unsigned int flags)
167 struct datapath *dp = port->dp;
168 struct ifinfomsg *hdr;
169 struct nlmsghdr *nlh;
171 if (!port->ops->get_ifindex)
174 nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags);
178 hdr = nlmsg_data(nlh);
179 hdr->ifi_family = AF_BRIDGE;
181 hdr->ifi_type = ARPHRD_ETHER;
182 hdr->ifi_index = port->ops->get_ifindex(port);
183 hdr->ifi_flags = port->ops->get_dev_flags(port);
186 NLA_PUT_STRING(skb, IFLA_IFNAME, port->ops->get_name(port));
187 NLA_PUT_U32(skb, IFLA_MASTER, get_dpifindex(dp));
188 NLA_PUT_U32(skb, IFLA_MTU, port->ops->get_mtu(port));
189 #ifdef IFLA_OPERSTATE
190 NLA_PUT_U8(skb, IFLA_OPERSTATE,
191 port->ops->is_running(port)
192 ? port->ops->get_operstate(port)
196 NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, port->ops->get_addr(port));
198 return nlmsg_end(skb, nlh);
201 nlmsg_cancel(skb, nlh);
205 /* Caller must hold RTNL lock. */
206 static void dp_ifinfo_notify(int event, struct vport *port)
211 skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL);
217 err = dp_fill_ifinfo(skb, port, event, 0);
219 if (err == -ENODEV) {
222 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
223 WARN_ON(err == -EMSGSIZE);
228 rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
232 rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err);
237 static void release_dp(struct kobject *kobj)
239 struct datapath *dp = container_of(kobj, struct datapath, ifobj);
243 static struct kobj_type dp_ktype = {
244 .release = release_dp
247 static void destroy_dp_rcu(struct rcu_head *rcu)
249 struct datapath *dp = container_of(rcu, struct datapath, rcu);
251 flow_tbl_destroy((__force struct flow_table *)dp->table);
252 free_percpu(dp->stats_percpu);
253 kobject_put(&dp->ifobj);
256 /* Called with RTNL lock and genl_lock. */
257 static struct vport *new_vport(const struct vport_parms *parms)
261 vport = vport_add(parms);
262 if (!IS_ERR(vport)) {
263 struct datapath *dp = parms->dp;
265 rcu_assign_pointer(dp->ports[parms->port_no], vport);
266 list_add(&vport->node, &dp->port_list);
268 dp_ifinfo_notify(RTM_NEWLINK, vport);
274 /* Called with RTNL lock. */
275 void dp_detach_port(struct vport *p)
279 if (p->port_no != OVSP_LOCAL)
281 dp_ifinfo_notify(RTM_DELLINK, p);
283 /* First drop references to device. */
285 rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
287 /* Then destroy it. */
291 /* Must be called with rcu_read_lock. */
292 void dp_process_received_packet(struct vport *p, struct sk_buff *skb)
294 struct datapath *dp = p->dp;
295 struct sw_flow *flow;
296 struct dp_stats_percpu *stats;
300 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
302 if (!OVS_CB(skb)->flow) {
303 struct sw_flow_key key;
306 /* Extract flow from 'skb' into 'key'. */
307 error = flow_extract(skb, p->port_no, &key, &key_len);
308 if (unlikely(error)) {
314 flow = flow_tbl_lookup(rcu_dereference(dp->table),
316 if (unlikely(!flow)) {
317 struct dp_upcall_info upcall;
319 upcall.cmd = OVS_PACKET_CMD_MISS;
321 upcall.userdata = NULL;
322 upcall.pid = p->upcall_pid;
323 dp_upcall(dp, skb, &upcall);
325 stats_counter = &stats->n_missed;
329 OVS_CB(skb)->flow = flow;
332 stats_counter = &stats->n_hit;
333 flow_used(OVS_CB(skb)->flow, skb);
334 execute_actions(dp, skb);
337 /* Update datapath statistics. */
339 write_seqcount_begin(&stats->seqlock);
341 write_seqcount_end(&stats->seqlock);
344 static struct genl_family dp_packet_genl_family = {
345 .id = GENL_ID_GENERATE,
346 .hdrsize = sizeof(struct ovs_header),
347 .name = OVS_PACKET_FAMILY,
348 .version = OVS_PACKET_VERSION,
349 .maxattr = OVS_PACKET_ATTR_MAX
352 int dp_upcall(struct datapath *dp, struct sk_buff *skb,
353 const struct dp_upcall_info *upcall_info)
355 struct dp_stats_percpu *stats;
359 if (upcall_info->pid == 0) {
364 dp_ifindex = get_dpifindex(dp);
370 forward_ip_summed(skb, true);
372 if (!skb_is_gso(skb))
373 err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
375 err = queue_gso_packets(dp_ifindex, skb, upcall_info);
382 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
384 write_seqcount_begin(&stats->seqlock);
386 write_seqcount_end(&stats->seqlock);
391 static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
392 const struct dp_upcall_info *upcall_info)
394 struct dp_upcall_info later_info;
395 struct sw_flow_key later_key;
396 struct sk_buff *segs, *nskb;
399 segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
403 /* Queue all of the segments. */
406 err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
410 if (skb == segs && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) {
411 /* The initial flow key extracted by flow_extract() in
412 * this case is for a first fragment, so we need to
413 * properly mark later fragments.
415 later_key = *upcall_info->key;
416 later_key.ip.frag = OVS_FRAG_TYPE_LATER;
418 later_info = *upcall_info;
419 later_info.key = &later_key;
420 upcall_info = &later_info;
422 } while ((skb = skb->next));
424 /* Free all of the segments. */
432 } while ((skb = nskb));
436 static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
437 const struct dp_upcall_info *upcall_info)
439 struct ovs_header *upcall;
440 struct sk_buff *user_skb; /* to be queued to userspace */
445 err = vlan_deaccel_tag(skb);
449 if (nla_attr_size(skb->len) > USHRT_MAX)
452 len = sizeof(struct ovs_header);
453 len += nla_total_size(skb->len);
454 len += nla_total_size(FLOW_BUFSIZE);
455 if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
456 len += nla_total_size(8);
458 user_skb = genlmsg_new(len, GFP_ATOMIC);
462 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
463 0, upcall_info->cmd);
464 upcall->dp_ifindex = dp_ifindex;
466 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
467 flow_to_nlattrs(upcall_info->key, user_skb);
468 nla_nest_end(user_skb, nla);
470 if (upcall_info->userdata)
471 nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
472 nla_get_u64(upcall_info->userdata));
474 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
476 skb_copy_and_csum_dev(skb, nla_data(nla));
478 return genlmsg_unicast(&init_net, user_skb, upcall_info->pid);
481 /* Called with genl_mutex. */
482 static int flush_flows(int dp_ifindex)
484 struct flow_table *old_table;
485 struct flow_table *new_table;
488 dp = get_dp(dp_ifindex);
492 old_table = get_table_protected(dp);
493 new_table = flow_tbl_alloc(TBL_MIN_BUCKETS);
497 rcu_assign_pointer(dp->table, new_table);
499 flow_tbl_deferred_destroy(old_table);
503 static int validate_actions(const struct nlattr *attr,
504 const struct sw_flow_key *key, int depth);
506 static int validate_sample(const struct nlattr *attr,
507 const struct sw_flow_key *key, int depth)
509 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
510 const struct nlattr *probability, *actions;
511 const struct nlattr *a;
514 memset(attrs, 0, sizeof(attrs));
515 nla_for_each_nested(a, attr, rem) {
516 int type = nla_type(a);
517 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
524 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
525 if (!probability || nla_len(probability) != sizeof(u32))
528 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
529 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
531 return validate_actions(actions, key, depth + 1);
534 static int validate_set(const struct nlattr *a,
535 const struct sw_flow_key *flow_key)
537 const struct nlattr *ovs_key = nla_data(a);
538 int key_type = nla_type(ovs_key);
540 /* There can be only one key in a action */
541 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
544 if (key_type > OVS_KEY_ATTR_MAX ||
545 nla_len(ovs_key) != ovs_key_lens[key_type])
549 const struct ovs_key_ipv4 *ipv4_key;
551 case OVS_KEY_ATTR_PRIORITY:
552 case OVS_KEY_ATTR_TUN_ID:
553 case OVS_KEY_ATTR_ETHERNET:
556 case OVS_KEY_ATTR_IPV4:
557 if (flow_key->eth.type != htons(ETH_P_IP))
560 if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst)
563 ipv4_key = nla_data(ovs_key);
564 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
567 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
572 case OVS_KEY_ATTR_TCP:
573 if (flow_key->ip.proto != IPPROTO_TCP)
576 if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst)
581 case OVS_KEY_ATTR_UDP:
582 if (flow_key->ip.proto != IPPROTO_UDP)
585 if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst)
596 static int validate_userspace(const struct nlattr *attr)
598 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
599 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
600 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 },
602 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
605 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
606 attr, userspace_policy);
610 if (!a[OVS_USERSPACE_ATTR_PID] ||
611 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
617 static int validate_actions(const struct nlattr *attr,
618 const struct sw_flow_key *key, int depth)
620 const struct nlattr *a;
623 if (depth >= SAMPLE_ACTION_DEPTH)
626 nla_for_each_nested(a, attr, rem) {
627 /* Expected argument lengths, (u32)-1 for variable length. */
628 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
629 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
630 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
631 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
632 [OVS_ACTION_ATTR_POP_VLAN] = 0,
633 [OVS_ACTION_ATTR_SET] = (u32)-1,
634 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1
636 const struct ovs_action_push_vlan *vlan;
637 int type = nla_type(a);
639 if (type > OVS_ACTION_ATTR_MAX ||
640 (action_lens[type] != nla_len(a) &&
641 action_lens[type] != (u32)-1))
645 case OVS_ACTION_ATTR_UNSPEC:
648 case OVS_ACTION_ATTR_USERSPACE:
649 err = validate_userspace(a);
654 case OVS_ACTION_ATTR_OUTPUT:
655 if (nla_get_u32(a) >= DP_MAX_PORTS)
660 case OVS_ACTION_ATTR_POP_VLAN:
663 case OVS_ACTION_ATTR_PUSH_VLAN:
665 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
667 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
671 case OVS_ACTION_ATTR_SET:
672 err = validate_set(a, key);
677 case OVS_ACTION_ATTR_SAMPLE:
678 err = validate_sample(a, key, depth);
694 static void clear_stats(struct sw_flow *flow)
698 flow->packet_count = 0;
699 flow->byte_count = 0;
702 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
704 struct ovs_header *ovs_header = info->userhdr;
705 struct nlattr **a = info->attrs;
706 struct sw_flow_actions *acts;
707 struct sk_buff *packet;
708 struct sw_flow *flow;
716 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
717 !a[OVS_PACKET_ATTR_ACTIONS] ||
718 nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
721 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
722 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
726 skb_reserve(packet, NET_IP_ALIGN);
728 memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len);
730 skb_reset_mac_header(packet);
731 eth = eth_hdr(packet);
733 /* Normally, setting the skb 'protocol' field would be handled by a
734 * call to eth_type_trans(), but it assumes there's a sending
735 * device, which we may not have. */
736 if (ntohs(eth->h_proto) >= 1536)
737 packet->protocol = eth->h_proto;
739 packet->protocol = htons(ETH_P_802_2);
741 /* Build an sw_flow for sending this packet. */
747 err = flow_extract(packet, -1, &flow->key, &key_len);
751 err = flow_metadata_from_nlattrs(&flow->key.phy.priority,
752 &flow->key.phy.in_port,
753 &flow->key.phy.tun_id,
754 a[OVS_PACKET_ATTR_KEY]);
758 err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0);
762 flow->hash = flow_hash(&flow->key, key_len);
764 acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
768 rcu_assign_pointer(flow->sf_acts, acts);
770 OVS_CB(packet)->flow = flow;
771 packet->priority = flow->key.phy.priority;
774 dp = get_dp(ovs_header->dp_ifindex);
780 err = execute_actions(dp, packet);
797 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
798 [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC },
799 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
800 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
803 static struct genl_ops dp_packet_genl_ops[] = {
804 { .cmd = OVS_PACKET_CMD_EXECUTE,
805 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
806 .policy = packet_policy,
807 .doit = ovs_packet_cmd_execute
811 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
814 struct flow_table *table = get_table_protected(dp);
816 stats->n_flows = flow_tbl_count(table);
818 stats->n_hit = stats->n_missed = stats->n_lost = 0;
819 for_each_possible_cpu(i) {
820 const struct dp_stats_percpu *percpu_stats;
821 struct dp_stats_percpu local_stats;
824 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
827 seqcount = read_seqcount_begin(&percpu_stats->seqlock);
828 local_stats = *percpu_stats;
829 } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount));
831 stats->n_hit += local_stats.n_hit;
832 stats->n_missed += local_stats.n_missed;
833 stats->n_lost += local_stats.n_lost;
837 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
838 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
839 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
840 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
843 static struct genl_family dp_flow_genl_family = {
844 .id = GENL_ID_GENERATE,
845 .hdrsize = sizeof(struct ovs_header),
846 .name = OVS_FLOW_FAMILY,
847 .version = OVS_FLOW_VERSION,
848 .maxattr = OVS_FLOW_ATTR_MAX
851 static struct genl_multicast_group dp_flow_multicast_group = {
852 .name = OVS_FLOW_MCGROUP
855 /* Called with genl_lock. */
856 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
857 struct sk_buff *skb, u32 pid,
858 u32 seq, u32 flags, u8 cmd)
860 const int skb_orig_len = skb->len;
861 const struct sw_flow_actions *sf_acts;
862 struct ovs_flow_stats stats;
863 struct ovs_header *ovs_header;
869 sf_acts = rcu_dereference_protected(flow->sf_acts,
870 lockdep_genl_is_held());
872 ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd);
876 ovs_header->dp_ifindex = get_dpifindex(dp);
878 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
880 goto nla_put_failure;
881 err = flow_to_nlattrs(&flow->key, skb);
884 nla_nest_end(skb, nla);
886 spin_lock_bh(&flow->lock);
888 stats.n_packets = flow->packet_count;
889 stats.n_bytes = flow->byte_count;
890 tcp_flags = flow->tcp_flags;
891 spin_unlock_bh(&flow->lock);
894 NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used));
897 NLA_PUT(skb, OVS_FLOW_ATTR_STATS,
898 sizeof(struct ovs_flow_stats), &stats);
901 NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags);
903 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
904 * this is the first flow to be dumped into 'skb'. This is unusual for
905 * Netlink but individual action lists can be longer than
906 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
907 * The userspace caller can always fetch the actions separately if it
908 * really wants them. (Most userspace callers in fact don't care.)
910 * This can only fail for dump operations because the skb is always
911 * properly sized for single flows.
913 err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
915 if (err < 0 && skb_orig_len)
918 return genlmsg_end(skb, ovs_header);
923 genlmsg_cancel(skb, ovs_header);
927 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
929 const struct sw_flow_actions *sf_acts;
932 sf_acts = rcu_dereference_protected(flow->sf_acts,
933 lockdep_genl_is_held());
935 /* OVS_FLOW_ATTR_KEY */
936 len = nla_total_size(FLOW_BUFSIZE);
937 /* OVS_FLOW_ATTR_ACTIONS */
938 len += nla_total_size(sf_acts->actions_len);
939 /* OVS_FLOW_ATTR_STATS */
940 len += nla_total_size(sizeof(struct ovs_flow_stats));
941 /* OVS_FLOW_ATTR_TCP_FLAGS */
942 len += nla_total_size(1);
943 /* OVS_FLOW_ATTR_USED */
944 len += nla_total_size(8);
946 len += NLMSG_ALIGN(sizeof(struct ovs_header));
948 return genlmsg_new(len, GFP_KERNEL);
951 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
953 u32 pid, u32 seq, u8 cmd)
958 skb = ovs_flow_cmd_alloc_info(flow);
960 return ERR_PTR(-ENOMEM);
962 retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd);
967 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
969 struct nlattr **a = info->attrs;
970 struct ovs_header *ovs_header = info->userhdr;
971 struct sw_flow_key key;
972 struct sw_flow *flow;
973 struct sk_buff *reply;
975 struct flow_table *table;
981 if (!a[OVS_FLOW_ATTR_KEY])
983 error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
987 /* Validate actions. */
988 if (a[OVS_FLOW_ATTR_ACTIONS]) {
989 error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0);
992 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
997 dp = get_dp(ovs_header->dp_ifindex);
1002 table = get_table_protected(dp);
1003 flow = flow_tbl_lookup(table, &key, key_len);
1005 struct sw_flow_actions *acts;
1007 /* Bail out if we're not allowed to create a new flow. */
1009 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
1012 /* Expand table, if necessary, to make room. */
1013 if (flow_tbl_need_to_expand(table)) {
1014 struct flow_table *new_table;
1016 new_table = flow_tbl_expand(table);
1017 if (!IS_ERR(new_table)) {
1018 rcu_assign_pointer(dp->table, new_table);
1019 flow_tbl_deferred_destroy(table);
1020 table = get_table_protected(dp);
1024 /* Allocate flow. */
1025 flow = flow_alloc();
1027 error = PTR_ERR(flow);
1033 /* Obtain actions. */
1034 acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
1035 error = PTR_ERR(acts);
1037 goto error_free_flow;
1038 rcu_assign_pointer(flow->sf_acts, acts);
1040 /* Put flow in bucket. */
1041 flow->hash = flow_hash(&key, key_len);
1042 flow_tbl_insert(table, flow);
1044 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
1048 /* We found a matching flow. */
1049 struct sw_flow_actions *old_acts;
1050 struct nlattr *acts_attrs;
1052 /* Bail out if we're not allowed to modify an existing flow.
1053 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1054 * because Generic Netlink treats the latter as a dump
1055 * request. We also accept NLM_F_EXCL in case that bug ever
1059 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
1060 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
1063 /* Update actions. */
1064 old_acts = rcu_dereference_protected(flow->sf_acts,
1065 lockdep_genl_is_held());
1066 acts_attrs = a[OVS_FLOW_ATTR_ACTIONS];
1068 (old_acts->actions_len != nla_len(acts_attrs) ||
1069 memcmp(old_acts->actions, nla_data(acts_attrs),
1070 old_acts->actions_len))) {
1071 struct sw_flow_actions *new_acts;
1073 new_acts = flow_actions_alloc(acts_attrs);
1074 error = PTR_ERR(new_acts);
1075 if (IS_ERR(new_acts))
1078 rcu_assign_pointer(flow->sf_acts, new_acts);
1079 flow_deferred_free_acts(old_acts);
1082 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
1083 info->snd_seq, OVS_FLOW_CMD_NEW);
1086 if (a[OVS_FLOW_ATTR_CLEAR]) {
1087 spin_lock_bh(&flow->lock);
1089 spin_unlock_bh(&flow->lock);
1094 genl_notify(reply, genl_info_net(info), info->snd_pid,
1095 dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1097 netlink_set_err(INIT_NET_GENL_SOCK, 0,
1098 dp_flow_multicast_group.id, PTR_ERR(reply));
1107 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1109 struct nlattr **a = info->attrs;
1110 struct ovs_header *ovs_header = info->userhdr;
1111 struct sw_flow_key key;
1112 struct sk_buff *reply;
1113 struct sw_flow *flow;
1114 struct datapath *dp;
1115 struct flow_table *table;
1119 if (!a[OVS_FLOW_ATTR_KEY])
1121 err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1125 dp = get_dp(ovs_header->dp_ifindex);
1129 table = get_table_protected(dp);
1130 flow = flow_tbl_lookup(table, &key, key_len);
1134 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
1135 info->snd_seq, OVS_FLOW_CMD_NEW);
1137 return PTR_ERR(reply);
1139 return genlmsg_reply(reply, info);
1142 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1144 struct nlattr **a = info->attrs;
1145 struct ovs_header *ovs_header = info->userhdr;
1146 struct sw_flow_key key;
1147 struct sk_buff *reply;
1148 struct sw_flow *flow;
1149 struct datapath *dp;
1150 struct flow_table *table;
1154 if (!a[OVS_FLOW_ATTR_KEY])
1155 return flush_flows(ovs_header->dp_ifindex);
1156 err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1160 dp = get_dp(ovs_header->dp_ifindex);
1164 table = get_table_protected(dp);
1165 flow = flow_tbl_lookup(table, &key, key_len);
1169 reply = ovs_flow_cmd_alloc_info(flow);
1173 flow_tbl_remove(table, flow);
1175 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid,
1176 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
1179 flow_deferred_free(flow);
1181 genl_notify(reply, genl_info_net(info), info->snd_pid,
1182 dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1186 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1188 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1189 struct datapath *dp;
1191 dp = get_dp(ovs_header->dp_ifindex);
1196 struct sw_flow *flow;
1199 bucket = cb->args[0];
1201 flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj);
1205 if (ovs_flow_cmd_fill_info(flow, dp, skb,
1206 NETLINK_CB(cb->skb).pid,
1207 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1208 OVS_FLOW_CMD_NEW) < 0)
1211 cb->args[0] = bucket;
1217 static struct genl_ops dp_flow_genl_ops[] = {
1218 { .cmd = OVS_FLOW_CMD_NEW,
1219 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1220 .policy = flow_policy,
1221 .doit = ovs_flow_cmd_new_or_set
1223 { .cmd = OVS_FLOW_CMD_DEL,
1224 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1225 .policy = flow_policy,
1226 .doit = ovs_flow_cmd_del
1228 { .cmd = OVS_FLOW_CMD_GET,
1229 .flags = 0, /* OK for unprivileged users. */
1230 .policy = flow_policy,
1231 .doit = ovs_flow_cmd_get,
1232 .dumpit = ovs_flow_cmd_dump
1234 { .cmd = OVS_FLOW_CMD_SET,
1235 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1236 .policy = flow_policy,
1237 .doit = ovs_flow_cmd_new_or_set,
1241 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1242 #ifdef HAVE_NLA_NUL_STRING
1243 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1245 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1248 static struct genl_family dp_datapath_genl_family = {
1249 .id = GENL_ID_GENERATE,
1250 .hdrsize = sizeof(struct ovs_header),
1251 .name = OVS_DATAPATH_FAMILY,
1252 .version = OVS_DATAPATH_VERSION,
1253 .maxattr = OVS_DP_ATTR_MAX
1256 static struct genl_multicast_group dp_datapath_multicast_group = {
1257 .name = OVS_DATAPATH_MCGROUP
1260 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1261 u32 pid, u32 seq, u32 flags, u8 cmd)
1263 struct ovs_header *ovs_header;
1267 ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family,
1272 ovs_header->dp_ifindex = get_dpifindex(dp);
1275 err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp));
1278 goto nla_put_failure;
1280 nla = nla_reserve(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats));
1282 goto nla_put_failure;
1283 get_dp_stats(dp, nla_data(nla));
1285 return genlmsg_end(skb, ovs_header);
1288 genlmsg_cancel(skb, ovs_header);
1293 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
1296 struct sk_buff *skb;
1299 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1301 return ERR_PTR(-ENOMEM);
1303 retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd);
1306 return ERR_PTR(retval);
1311 static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1313 return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1);
1316 /* Called with genl_mutex and optionally with RTNL lock also. */
1317 static struct datapath *lookup_datapath(struct ovs_header *ovs_header,
1318 struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1320 struct datapath *dp;
1322 if (!a[OVS_DP_ATTR_NAME])
1323 dp = get_dp(ovs_header->dp_ifindex);
1325 struct vport *vport;
1328 vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME]));
1329 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1332 return dp ? dp : ERR_PTR(-ENODEV);
1335 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1337 struct nlattr **a = info->attrs;
1338 struct vport_parms parms;
1339 struct sk_buff *reply;
1340 struct datapath *dp;
1341 struct vport *vport;
1345 if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
1348 err = ovs_dp_cmd_validate(a);
1354 if (!try_module_get(THIS_MODULE))
1355 goto err_unlock_rtnl;
1358 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1360 goto err_put_module;
1361 INIT_LIST_HEAD(&dp->port_list);
1363 /* Initialize kobject for bridge. This will be added as
1364 * /sys/class/net/<devname>/brif later, if sysfs is enabled. */
1365 dp->ifobj.kset = NULL;
1366 kobject_init(&dp->ifobj, &dp_ktype);
1368 /* Allocate table. */
1370 rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS));
1374 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1375 if (!dp->stats_percpu) {
1377 goto err_destroy_table;
1380 /* Set up our datapath device. */
1381 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1382 parms.type = OVS_VPORT_TYPE_INTERNAL;
1383 parms.options = NULL;
1385 parms.port_no = OVSP_LOCAL;
1386 parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1388 vport = new_vport(&parms);
1389 if (IS_ERR(vport)) {
1390 err = PTR_ERR(vport);
1394 goto err_destroy_percpu;
1397 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1398 info->snd_seq, OVS_DP_CMD_NEW);
1399 err = PTR_ERR(reply);
1401 goto err_destroy_local_port;
1403 list_add_tail(&dp->list_node, &dps);
1404 dp_sysfs_add_dp(dp);
1408 genl_notify(reply, genl_info_net(info), info->snd_pid,
1409 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1412 err_destroy_local_port:
1413 dp_detach_port(get_vport_protected(dp, OVSP_LOCAL));
1415 free_percpu(dp->stats_percpu);
1417 flow_tbl_destroy(get_table_protected(dp));
1421 module_put(THIS_MODULE);
1428 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1430 struct vport *vport, *next_vport;
1431 struct sk_buff *reply;
1432 struct datapath *dp;
1435 err = ovs_dp_cmd_validate(info->attrs);
1440 dp = lookup_datapath(info->userhdr, info->attrs);
1445 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1446 info->snd_seq, OVS_DP_CMD_DEL);
1447 err = PTR_ERR(reply);
1451 list_for_each_entry_safe(vport, next_vport, &dp->port_list, node)
1452 if (vport->port_no != OVSP_LOCAL)
1453 dp_detach_port(vport);
1455 dp_sysfs_del_dp(dp);
1456 list_del(&dp->list_node);
1457 dp_detach_port(get_vport_protected(dp, OVSP_LOCAL));
1459 /* rtnl_unlock() will wait until all the references to devices that
1460 * are pending unregistration have been dropped. We do it here to
1461 * ensure that any internal devices (which contain DP pointers) are
1462 * fully destroyed before freeing the datapath.
1466 call_rcu(&dp->rcu, destroy_dp_rcu);
1467 module_put(THIS_MODULE);
1469 genl_notify(reply, genl_info_net(info), info->snd_pid,
1470 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1480 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1482 struct sk_buff *reply;
1483 struct datapath *dp;
1486 err = ovs_dp_cmd_validate(info->attrs);
1490 dp = lookup_datapath(info->userhdr, info->attrs);
1494 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1495 info->snd_seq, OVS_DP_CMD_NEW);
1496 if (IS_ERR(reply)) {
1497 err = PTR_ERR(reply);
1498 netlink_set_err(INIT_NET_GENL_SOCK, 0,
1499 dp_datapath_multicast_group.id, err);
1503 genl_notify(reply, genl_info_net(info), info->snd_pid,
1504 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1508 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1510 struct sk_buff *reply;
1511 struct datapath *dp;
1514 err = ovs_dp_cmd_validate(info->attrs);
1518 dp = lookup_datapath(info->userhdr, info->attrs);
1522 reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
1523 info->snd_seq, OVS_DP_CMD_NEW);
1525 return PTR_ERR(reply);
1527 return genlmsg_reply(reply, info);
1530 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1532 struct datapath *dp;
1533 int skip = cb->args[0];
1536 list_for_each_entry(dp, &dps, list_node) {
1539 if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
1540 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1541 OVS_DP_CMD_NEW) < 0)
1551 static struct genl_ops dp_datapath_genl_ops[] = {
1552 { .cmd = OVS_DP_CMD_NEW,
1553 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1554 .policy = datapath_policy,
1555 .doit = ovs_dp_cmd_new
1557 { .cmd = OVS_DP_CMD_DEL,
1558 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1559 .policy = datapath_policy,
1560 .doit = ovs_dp_cmd_del
1562 { .cmd = OVS_DP_CMD_GET,
1563 .flags = 0, /* OK for unprivileged users. */
1564 .policy = datapath_policy,
1565 .doit = ovs_dp_cmd_get,
1566 .dumpit = ovs_dp_cmd_dump
1568 { .cmd = OVS_DP_CMD_SET,
1569 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1570 .policy = datapath_policy,
1571 .doit = ovs_dp_cmd_set,
1575 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1576 #ifdef HAVE_NLA_NUL_STRING
1577 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1578 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1579 [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN },
1581 [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) },
1582 [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN },
1584 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1585 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1586 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1587 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1590 static struct genl_family dp_vport_genl_family = {
1591 .id = GENL_ID_GENERATE,
1592 .hdrsize = sizeof(struct ovs_header),
1593 .name = OVS_VPORT_FAMILY,
1594 .version = OVS_VPORT_VERSION,
1595 .maxattr = OVS_VPORT_ATTR_MAX
1598 struct genl_multicast_group dp_vport_multicast_group = {
1599 .name = OVS_VPORT_MCGROUP
1602 /* Called with RTNL lock or RCU read lock. */
1603 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1604 u32 pid, u32 seq, u32 flags, u8 cmd)
1606 struct ovs_header *ovs_header;
1610 ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family,
1615 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1617 NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no);
1618 NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type);
1619 NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport->ops->get_name(vport));
1620 NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid);
1622 nla = nla_reserve(skb, OVS_VPORT_ATTR_STATS,
1623 sizeof(struct ovs_vport_stats));
1625 goto nla_put_failure;
1627 vport_get_stats(vport, nla_data(nla));
1629 NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN,
1630 vport->ops->get_addr(vport));
1632 err = vport_get_options(vport, skb);
1633 if (err == -EMSGSIZE)
1636 return genlmsg_end(skb, ovs_header);
1641 genlmsg_cancel(skb, ovs_header);
1645 /* Called with RTNL lock or RCU read lock. */
1646 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
1649 struct sk_buff *skb;
1652 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1654 return ERR_PTR(-ENOMEM);
1656 retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd);
1659 return ERR_PTR(retval);
1664 static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1666 return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1);
1669 /* Called with RTNL lock or RCU read lock. */
1670 static struct vport *lookup_vport(struct ovs_header *ovs_header,
1671 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1673 struct datapath *dp;
1674 struct vport *vport;
1676 if (a[OVS_VPORT_ATTR_NAME]) {
1677 vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
1679 return ERR_PTR(-ENODEV);
1681 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1682 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1684 if (port_no >= DP_MAX_PORTS)
1685 return ERR_PTR(-EFBIG);
1687 dp = get_dp(ovs_header->dp_ifindex);
1689 return ERR_PTR(-ENODEV);
1691 vport = get_vport_protected(dp, port_no);
1693 return ERR_PTR(-ENOENT);
1696 return ERR_PTR(-EINVAL);
1699 /* Called with RTNL lock. */
1700 static int change_vport(struct vport *vport,
1701 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1705 if (a[OVS_VPORT_ATTR_STATS])
1706 vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1708 if (a[OVS_VPORT_ATTR_ADDRESS])
1709 err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS]));
1714 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1716 struct nlattr **a = info->attrs;
1717 struct ovs_header *ovs_header = info->userhdr;
1718 struct vport_parms parms;
1719 struct sk_buff *reply;
1720 struct vport *vport;
1721 struct datapath *dp;
1726 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
1727 !a[OVS_VPORT_ATTR_UPCALL_PID])
1730 err = ovs_vport_cmd_validate(a);
1735 dp = get_dp(ovs_header->dp_ifindex);
1740 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1741 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1744 if (port_no >= DP_MAX_PORTS)
1747 vport = get_vport_protected(dp, port_no);
1752 for (port_no = 1; ; port_no++) {
1753 if (port_no >= DP_MAX_PORTS) {
1757 vport = get_vport_protected(dp, port_no);
1763 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1764 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1765 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1767 parms.port_no = port_no;
1768 parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1770 vport = new_vport(&parms);
1771 err = PTR_ERR(vport);
1775 dp_sysfs_add_if(vport);
1777 err = change_vport(vport, a);
1779 reply = ovs_vport_cmd_build_info(vport, info->snd_pid,
1783 err = PTR_ERR(reply);
1786 dp_detach_port(vport);
1789 genl_notify(reply, genl_info_net(info), info->snd_pid,
1790 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1799 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1801 struct nlattr **a = info->attrs;
1802 struct sk_buff *reply;
1803 struct vport *vport;
1806 err = ovs_vport_cmd_validate(a);
1811 vport = lookup_vport(info->userhdr, a);
1812 err = PTR_ERR(vport);
1817 if (a[OVS_VPORT_ATTR_TYPE] &&
1818 nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type)
1821 if (!err && a[OVS_VPORT_ATTR_OPTIONS])
1822 err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1824 err = change_vport(vport, a);
1825 if (!err && a[OVS_VPORT_ATTR_UPCALL_PID])
1826 vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1828 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
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);
1837 genl_notify(reply, genl_info_net(info), info->snd_pid,
1838 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1846 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1848 struct nlattr **a = info->attrs;
1849 struct sk_buff *reply;
1850 struct vport *vport;
1853 err = ovs_vport_cmd_validate(a);
1858 vport = lookup_vport(info->userhdr, a);
1859 err = PTR_ERR(vport);
1863 if (vport->port_no == OVSP_LOCAL) {
1868 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1870 err = PTR_ERR(reply);
1874 dp_detach_port(vport);
1876 genl_notify(reply, genl_info_net(info), info->snd_pid,
1877 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1885 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1887 struct nlattr **a = info->attrs;
1888 struct ovs_header *ovs_header = info->userhdr;
1889 struct sk_buff *reply;
1890 struct vport *vport;
1893 err = ovs_vport_cmd_validate(a);
1898 vport = lookup_vport(ovs_header, a);
1899 err = PTR_ERR(vport);
1903 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1905 err = PTR_ERR(reply);
1911 return genlmsg_reply(reply, info);
1919 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1921 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1922 struct datapath *dp;
1926 dp = get_dp(ovs_header->dp_ifindex);
1931 for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) {
1932 struct vport *vport;
1934 vport = get_vport_protected(dp, port_no);
1938 if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid,
1939 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1940 OVS_VPORT_CMD_NEW) < 0)
1945 cb->args[0] = port_no;
1951 static struct genl_ops dp_vport_genl_ops[] = {
1952 { .cmd = OVS_VPORT_CMD_NEW,
1953 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1954 .policy = vport_policy,
1955 .doit = ovs_vport_cmd_new
1957 { .cmd = OVS_VPORT_CMD_DEL,
1958 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1959 .policy = vport_policy,
1960 .doit = ovs_vport_cmd_del
1962 { .cmd = OVS_VPORT_CMD_GET,
1963 .flags = 0, /* OK for unprivileged users. */
1964 .policy = vport_policy,
1965 .doit = ovs_vport_cmd_get,
1966 .dumpit = ovs_vport_cmd_dump
1968 { .cmd = OVS_VPORT_CMD_SET,
1969 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1970 .policy = vport_policy,
1971 .doit = ovs_vport_cmd_set,
1975 struct genl_family_and_ops {
1976 struct genl_family *family;
1977 struct genl_ops *ops;
1979 struct genl_multicast_group *group;
1982 static const struct genl_family_and_ops dp_genl_families[] = {
1983 { &dp_datapath_genl_family,
1984 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1985 &dp_datapath_multicast_group },
1986 { &dp_vport_genl_family,
1987 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1988 &dp_vport_multicast_group },
1989 { &dp_flow_genl_family,
1990 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1991 &dp_flow_multicast_group },
1992 { &dp_packet_genl_family,
1993 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1997 static void dp_unregister_genl(int n_families)
2001 for (i = 0; i < n_families; i++)
2002 genl_unregister_family(dp_genl_families[i].family);
2005 static int dp_register_genl(void)
2012 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
2013 const struct genl_family_and_ops *f = &dp_genl_families[i];
2015 err = genl_register_family_with_ops(f->family, f->ops,
2022 err = genl_register_mc_group(f->family, f->group);
2031 dp_unregister_genl(n_registered);
2035 static int __init dp_init(void)
2037 struct sk_buff *dummy_skb;
2040 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb));
2042 pr_info("Open vSwitch %s, built "__DATE__" "__TIME__"\n",
2051 goto error_tnl_exit;
2055 goto error_flow_exit;
2057 err = register_netdevice_notifier(&dp_device_notifier);
2059 goto error_vport_exit;
2061 err = dp_register_genl();
2063 goto error_unreg_notifier;
2067 error_unreg_notifier:
2068 unregister_netdevice_notifier(&dp_device_notifier);
2079 static void dp_cleanup(void)
2082 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2083 unregister_netdevice_notifier(&dp_device_notifier);
2089 module_init(dp_init);
2090 module_exit(dp_cleanup);
2092 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2093 MODULE_LICENSE("GPL");