2 * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 /* Functions for managing the dp interface/device. */
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/if_arp.h>
16 #include <linux/if_vlan.h>
19 #include <linux/jhash.h>
20 #include <linux/delay.h>
21 #include <linux/time.h>
22 #include <linux/etherdevice.h>
23 #include <linux/genetlink.h>
24 #include <linux/kernel.h>
25 #include <linux/kthread.h>
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>
33 #include <linux/wait.h>
34 #include <asm/system.h>
35 #include <asm/div64.h>
37 #include <linux/highmem.h>
38 #include <linux/netfilter_bridge.h>
39 #include <linux/netfilter_ipv4.h>
40 #include <linux/inetdevice.h>
41 #include <linux/list.h>
42 #include <linux/rculist.h>
43 #include <linux/dmi.h>
44 #include <net/inet_ecn.h>
45 #include <net/genetlink.h>
47 #include "openvswitch/datapath-protocol.h"
54 #include "vport-internal_dev.h"
56 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) || \
57 LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
58 #error Kernels before 2.6.18 or after 3.0 are not supported by this version of Open vSwitch.
61 int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
62 EXPORT_SYMBOL(dp_ioctl_hook);
67 * Writes to device state (add/remove datapath, port, set operations on vports,
68 * etc.) are protected by RTNL.
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.
74 * Reads are protected by RCU.
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
81 /* Global list of datapaths to enable dumping them all out.
82 * Protected by genl_mutex.
84 static LIST_HEAD(dps);
86 static struct vport *new_vport(const struct vport_parms *);
87 static int queue_userspace_packets(struct datapath *, u32 pid, struct sk_buff *,
88 const struct dp_upcall_info *);
90 /* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
91 struct datapath *get_dp(int dp_ifindex)
93 struct datapath *dp = NULL;
94 struct net_device *dev;
97 dev = dev_get_by_index_rcu(&init_net, dp_ifindex);
99 struct vport *vport = internal_dev_get_vport(dev);
107 EXPORT_SYMBOL_GPL(get_dp);
109 /* Must be called with genl_mutex. */
110 static struct flow_table *get_table_protected(struct datapath *dp)
112 return rcu_dereference_protected(dp->table, lockdep_genl_is_held());
115 /* Must be called with rcu_read_lock or RTNL lock. */
116 static struct vport *get_vport_protected(struct datapath *dp, u16 port_no)
118 return rcu_dereference_rtnl(dp->ports[port_no]);
121 /* Must be called with rcu_read_lock or RTNL lock. */
122 const char *dp_name(const struct datapath *dp)
124 return vport_get_name(rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]));
127 static int get_dpifindex(struct datapath *dp)
134 local = get_vport_protected(dp, OVSP_LOCAL);
136 ifindex = vport_get_ifindex(local);
145 static inline size_t br_nlmsg_size(void)
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 */
152 + nla_total_size(1); /* IFLA_OPERSTATE */
155 /* Caller must hold RTNL lock. */
156 static int dp_fill_ifinfo(struct sk_buff *skb,
157 const struct vport *port,
158 int event, unsigned int flags)
160 struct datapath *dp = port->dp;
161 int ifindex = vport_get_ifindex(port);
162 struct ifinfomsg *hdr;
163 struct nlmsghdr *nlh;
168 nlh = nlmsg_put(skb, 0, 0, event, sizeof(*hdr), flags);
172 hdr = nlmsg_data(nlh);
173 hdr->ifi_family = AF_BRIDGE;
175 hdr->ifi_type = ARPHRD_ETHER;
176 hdr->ifi_index = ifindex;
177 hdr->ifi_flags = vport_get_flags(port);
180 NLA_PUT_STRING(skb, IFLA_IFNAME, vport_get_name(port));
181 NLA_PUT_U32(skb, IFLA_MASTER, get_dpifindex(dp));
182 NLA_PUT_U32(skb, IFLA_MTU, vport_get_mtu(port));
183 #ifdef IFLA_OPERSTATE
184 NLA_PUT_U8(skb, IFLA_OPERSTATE,
185 vport_is_running(port)
186 ? vport_get_operstate(port)
190 NLA_PUT(skb, IFLA_ADDRESS, ETH_ALEN, vport_get_addr(port));
192 return nlmsg_end(skb, nlh);
195 nlmsg_cancel(skb, nlh);
199 /* Caller must hold RTNL lock. */
200 static void dp_ifinfo_notify(int event, struct vport *port)
205 skb = nlmsg_new(br_nlmsg_size(), GFP_KERNEL);
209 err = dp_fill_ifinfo(skb, port, event, 0);
211 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
212 WARN_ON(err == -EMSGSIZE);
216 rtnl_notify(skb, &init_net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
220 rtnl_set_sk_err(&init_net, RTNLGRP_LINK, err);
223 static void release_dp(struct kobject *kobj)
225 struct datapath *dp = container_of(kobj, struct datapath, ifobj);
229 static struct kobj_type dp_ktype = {
230 .release = release_dp
233 static void destroy_dp_rcu(struct rcu_head *rcu)
235 struct datapath *dp = container_of(rcu, struct datapath, rcu);
237 flow_tbl_destroy(dp->table);
238 free_percpu(dp->stats_percpu);
239 kobject_put(&dp->ifobj);
242 /* Called with RTNL lock and genl_lock. */
243 static struct vport *new_vport(const struct vport_parms *parms)
247 vport = vport_add(parms);
248 if (!IS_ERR(vport)) {
249 struct datapath *dp = parms->dp;
251 rcu_assign_pointer(dp->ports[parms->port_no], vport);
252 list_add(&vport->node, &dp->port_list);
254 dp_ifinfo_notify(RTM_NEWLINK, vport);
260 /* Called with RTNL lock. */
261 void dp_detach_port(struct vport *p)
265 if (p->port_no != OVSP_LOCAL)
267 dp_ifinfo_notify(RTM_DELLINK, p);
269 /* First drop references to device. */
271 rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
273 /* Then destroy it. */
277 /* Must be called with rcu_read_lock. */
278 void dp_process_received_packet(struct vport *p, struct sk_buff *skb)
280 struct datapath *dp = p->dp;
281 struct sw_flow *flow;
282 struct dp_stats_percpu *stats;
283 int stats_counter_off;
286 OVS_CB(skb)->vport = p;
288 if (!OVS_CB(skb)->flow) {
289 struct sw_flow_key key;
293 /* Extract flow from 'skb' into 'key'. */
294 error = flow_extract(skb, p->port_no, &key, &key_len, &is_frag);
295 if (unlikely(error)) {
300 if (is_frag && dp->drop_frags) {
302 stats_counter_off = offsetof(struct dp_stats_percpu, n_frags);
307 flow = flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len);
308 if (unlikely(!flow)) {
309 struct dp_upcall_info upcall;
311 upcall.cmd = OVS_PACKET_CMD_MISS;
313 dp_upcall(dp, skb, &upcall);
314 stats_counter_off = offsetof(struct dp_stats_percpu, n_missed);
318 OVS_CB(skb)->flow = flow;
321 stats_counter_off = offsetof(struct dp_stats_percpu, n_hit);
322 flow_used(OVS_CB(skb)->flow, skb);
323 execute_actions(dp, skb);
326 /* Update datapath statistics. */
328 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
330 write_seqcount_begin(&stats->seqlock);
331 (*(u64 *)((u8 *)stats + stats_counter_off))++;
332 write_seqcount_end(&stats->seqlock);
337 static void copy_and_csum_skb(struct sk_buff *skb, void *to)
339 u16 csum_start, csum_offset;
342 get_skb_csum_pointers(skb, &csum_start, &csum_offset);
343 csum_start -= skb_headroom(skb);
345 skb_copy_bits(skb, 0, to, csum_start);
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);
352 static struct genl_family dp_packet_genl_family = {
353 .id = GENL_ID_GENERATE,
354 .hdrsize = sizeof(struct ovs_header),
355 .name = OVS_PACKET_FAMILY,
357 .maxattr = OVS_PACKET_ATTR_MAX
360 int dp_upcall(struct datapath *dp, struct sk_buff *skb, const struct dp_upcall_info *upcall_info)
362 struct dp_stats_percpu *stats;
366 if (OVS_CB(skb)->flow)
367 pid = OVS_CB(skb)->flow->upcall_pid;
369 pid = OVS_CB(skb)->vport->upcall_pid;
377 forward_ip_summed(skb, true);
379 /* Break apart GSO packets into their component pieces. Otherwise
380 * userspace may try to stuff a 64kB packet into a 1500-byte MTU. */
381 if (skb_is_gso(skb)) {
382 struct sk_buff *nskb = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
393 err = queue_userspace_packets(dp, pid, skb, upcall_info);
401 stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
403 write_seqcount_begin(&stats->seqlock);
405 write_seqcount_end(&stats->seqlock);
412 /* Send each packet in the 'skb' list to userspace for 'dp' as directed by
413 * 'upcall_info'. There will be only one packet unless we broke up a GSO
416 static int queue_userspace_packets(struct datapath *dp, u32 pid,
418 const struct dp_upcall_info *upcall_info)
421 struct sk_buff *nskb;
424 dp_ifindex = get_dpifindex(dp);
432 struct ovs_header *upcall;
433 struct sk_buff *user_skb; /* to be queued to userspace */
440 err = vlan_deaccel_tag(skb);
444 if (nla_attr_size(skb->len) > USHRT_MAX) {
449 len = sizeof(struct ovs_header);
450 len += nla_total_size(skb->len);
451 len += nla_total_size(FLOW_BUFSIZE);
452 if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
453 len += nla_total_size(8);
455 user_skb = genlmsg_new(len, GFP_ATOMIC);
461 upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family, 0, upcall_info->cmd);
462 upcall->dp_ifindex = dp_ifindex;
464 nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
465 flow_to_nlattrs(upcall_info->key, user_skb);
466 nla_nest_end(user_skb, nla);
468 if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
469 nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
470 upcall_info->userdata);
472 nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
473 if (skb->ip_summed == CHECKSUM_PARTIAL)
474 copy_and_csum_skb(skb, nla_data(nla));
476 skb_copy_bits(skb, 0, nla_data(nla), skb->len);
478 err = genlmsg_unicast(&init_net, user_skb, pid);
489 while ((skb = nskb) != NULL) {
496 /* Called with genl_mutex. */
497 static int flush_flows(int dp_ifindex)
499 struct flow_table *old_table;
500 struct flow_table *new_table;
503 dp = get_dp(dp_ifindex);
507 old_table = get_table_protected(dp);
508 new_table = flow_tbl_alloc(TBL_MIN_BUCKETS);
512 rcu_assign_pointer(dp->table, new_table);
514 flow_tbl_deferred_destroy(old_table);
518 static int validate_actions(const struct nlattr *attr, int depth);
520 static int validate_sample(const struct nlattr *attr, int depth)
522 static const struct nla_policy sample_policy[OVS_SAMPLE_ATTR_MAX + 1] =
524 [OVS_SAMPLE_ATTR_PROBABILITY] = {.type = NLA_U32 },
525 [OVS_SAMPLE_ATTR_ACTIONS] = {.type = NLA_UNSPEC },
527 struct nlattr *a[OVS_SAMPLE_ATTR_MAX + 1];
530 error = nla_parse_nested(a, OVS_SAMPLE_ATTR_MAX, attr, sample_policy);
534 if (!a[OVS_SAMPLE_ATTR_PROBABILITY])
536 if (!a[OVS_SAMPLE_ATTR_ACTIONS])
539 return validate_actions(a[OVS_SAMPLE_ATTR_ACTIONS], (depth + 1));
542 static int validate_actions(const struct nlattr *attr, int depth)
544 const struct nlattr *a;
547 if (depth >= SAMPLE_ACTION_DEPTH)
550 nla_for_each_nested(a, attr, rem) {
551 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
552 [OVS_ACTION_ATTR_OUTPUT] = 4,
553 [OVS_ACTION_ATTR_USERSPACE] = 8,
554 [OVS_ACTION_ATTR_PUSH_VLAN] = 2,
555 [OVS_ACTION_ATTR_POP_VLAN] = 0,
556 [OVS_ACTION_ATTR_SET_DL_SRC] = ETH_ALEN,
557 [OVS_ACTION_ATTR_SET_DL_DST] = ETH_ALEN,
558 [OVS_ACTION_ATTR_SET_NW_SRC] = 4,
559 [OVS_ACTION_ATTR_SET_NW_DST] = 4,
560 [OVS_ACTION_ATTR_SET_NW_TOS] = 1,
561 [OVS_ACTION_ATTR_SET_TP_SRC] = 2,
562 [OVS_ACTION_ATTR_SET_TP_DST] = 2,
563 [OVS_ACTION_ATTR_SET_TUNNEL] = 8,
564 [OVS_ACTION_ATTR_SET_PRIORITY] = 4,
565 [OVS_ACTION_ATTR_POP_PRIORITY] = 0,
567 int type = nla_type(a);
569 /* Match expected attr len for given attr len except for
570 * OVS_ACTION_ATTR_SAMPLE, as it has nested actions list which
571 * is variable size. */
572 if (type > OVS_ACTION_ATTR_MAX ||
573 (nla_len(a) != action_lens[type] &&
574 type != OVS_ACTION_ATTR_SAMPLE))
578 case OVS_ACTION_ATTR_UNSPEC:
581 case OVS_ACTION_ATTR_USERSPACE:
582 case OVS_ACTION_ATTR_POP_VLAN:
583 case OVS_ACTION_ATTR_SET_DL_SRC:
584 case OVS_ACTION_ATTR_SET_DL_DST:
585 case OVS_ACTION_ATTR_SET_NW_SRC:
586 case OVS_ACTION_ATTR_SET_NW_DST:
587 case OVS_ACTION_ATTR_SET_TP_SRC:
588 case OVS_ACTION_ATTR_SET_TP_DST:
589 case OVS_ACTION_ATTR_SET_TUNNEL:
590 case OVS_ACTION_ATTR_SET_PRIORITY:
591 case OVS_ACTION_ATTR_POP_PRIORITY:
592 /* No validation needed. */
595 case OVS_ACTION_ATTR_OUTPUT:
596 if (nla_get_u32(a) >= DP_MAX_PORTS)
600 case OVS_ACTION_ATTR_PUSH_VLAN:
601 if (nla_get_be16(a) & htons(VLAN_CFI_MASK))
605 case OVS_ACTION_ATTR_SET_NW_TOS:
606 if (nla_get_u8(a) & INET_ECN_MASK)
610 case OVS_ACTION_ATTR_SAMPLE:
611 err = validate_sample(a, depth);
626 static void clear_stats(struct sw_flow *flow)
630 flow->packet_count = 0;
631 flow->byte_count = 0;
634 static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
636 struct ovs_header *ovs_header = info->userhdr;
637 struct nlattr **a = info->attrs;
638 struct sw_flow_actions *acts;
639 struct sk_buff *packet;
640 struct sw_flow *flow;
649 if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
650 !a[OVS_PACKET_ATTR_ACTIONS] ||
651 nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
654 err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], 0);
658 len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
659 packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
663 skb_reserve(packet, NET_IP_ALIGN);
665 memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len);
667 skb_reset_mac_header(packet);
668 eth = eth_hdr(packet);
670 /* Normally, setting the skb 'protocol' field would be handled by a
671 * call to eth_type_trans(), but it assumes there's a sending
672 * device, which we may not have. */
673 if (ntohs(eth->h_proto) >= 1536)
674 packet->protocol = eth->h_proto;
676 packet->protocol = htons(ETH_P_802_2);
678 /* Build an sw_flow for sending this packet. */
684 err = flow_extract(packet, -1, &flow->key, &key_len, &is_frag);
688 err = flow_metadata_from_nlattrs(&flow->key.eth.in_port,
689 &flow->key.eth.tun_id,
690 a[OVS_PACKET_ATTR_KEY]);
694 flow->hash = flow_hash(&flow->key, key_len);
696 if (a[OVS_PACKET_ATTR_UPCALL_PID])
697 flow->upcall_pid = nla_get_u32(a[OVS_PACKET_ATTR_UPCALL_PID]);
699 flow->upcall_pid = NETLINK_CB(skb).pid;
701 acts = flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
705 rcu_assign_pointer(flow->sf_acts, acts);
707 OVS_CB(packet)->flow = flow;
710 dp = get_dp(ovs_header->dp_ifindex);
715 if (flow->key.eth.in_port < DP_MAX_PORTS)
716 OVS_CB(packet)->vport = get_vport_protected(dp,
717 flow->key.eth.in_port);
719 err = execute_actions(dp, packet);
735 static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
736 [OVS_PACKET_ATTR_PACKET] = { .type = NLA_UNSPEC },
737 [OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
738 [OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
739 [OVS_PACKET_ATTR_UPCALL_PID] = { .type = NLA_U32 },
742 static struct genl_ops dp_packet_genl_ops[] = {
743 { .cmd = OVS_PACKET_CMD_EXECUTE,
744 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
745 .policy = packet_policy,
746 .doit = ovs_packet_cmd_execute
750 static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
753 struct flow_table *table = get_table_protected(dp);
755 stats->n_flows = flow_tbl_count(table);
757 stats->n_frags = stats->n_hit = stats->n_missed = stats->n_lost = 0;
758 for_each_possible_cpu(i) {
759 const struct dp_stats_percpu *percpu_stats;
760 struct dp_stats_percpu local_stats;
763 percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
766 seqcount = read_seqcount_begin(&percpu_stats->seqlock);
767 local_stats = *percpu_stats;
768 } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount));
770 stats->n_frags += local_stats.n_frags;
771 stats->n_hit += local_stats.n_hit;
772 stats->n_missed += local_stats.n_missed;
773 stats->n_lost += local_stats.n_lost;
777 static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
778 [OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
779 [OVS_FLOW_ATTR_UPCALL_PID] = { .type = NLA_U32 },
780 [OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
781 [OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
784 static struct genl_family dp_flow_genl_family = {
785 .id = GENL_ID_GENERATE,
786 .hdrsize = sizeof(struct ovs_header),
787 .name = OVS_FLOW_FAMILY,
789 .maxattr = OVS_FLOW_ATTR_MAX
792 static struct genl_multicast_group dp_flow_multicast_group = {
793 .name = OVS_FLOW_MCGROUP
796 /* Called with genl_lock. */
797 static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
798 struct sk_buff *skb, u32 pid, u32 seq, u32 flags, u8 cmd)
800 const int skb_orig_len = skb->len;
801 const struct sw_flow_actions *sf_acts;
802 struct ovs_flow_stats stats;
803 struct ovs_header *ovs_header;
809 sf_acts = rcu_dereference_protected(flow->sf_acts,
810 lockdep_genl_is_held());
812 ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd);
816 ovs_header->dp_ifindex = get_dpifindex(dp);
818 nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
820 goto nla_put_failure;
821 err = flow_to_nlattrs(&flow->key, skb);
824 nla_nest_end(skb, nla);
826 NLA_PUT_U32(skb, OVS_FLOW_ATTR_UPCALL_PID, flow->upcall_pid);
828 spin_lock_bh(&flow->lock);
830 stats.n_packets = flow->packet_count;
831 stats.n_bytes = flow->byte_count;
832 tcp_flags = flow->tcp_flags;
833 spin_unlock_bh(&flow->lock);
836 NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, flow_used_time(used));
839 NLA_PUT(skb, OVS_FLOW_ATTR_STATS, sizeof(struct ovs_flow_stats), &stats);
842 NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags);
844 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
845 * this is the first flow to be dumped into 'skb'. This is unusual for
846 * Netlink but individual action lists can be longer than
847 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
848 * The userspace caller can always fetch the actions separately if it
849 * really wants them. (Most userspace callers in fact don't care.)
851 * This can only fail for dump operations because the skb is always
852 * properly sized for single flows.
854 err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
856 if (err < 0 && skb_orig_len)
859 return genlmsg_end(skb, ovs_header);
864 genlmsg_cancel(skb, ovs_header);
868 static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
870 const struct sw_flow_actions *sf_acts;
873 sf_acts = rcu_dereference_protected(flow->sf_acts,
874 lockdep_genl_is_held());
876 len = nla_total_size(FLOW_BUFSIZE); /* OVS_FLOW_ATTR_KEY */
877 len += nla_total_size(sf_acts->actions_len); /* OVS_FLOW_ATTR_ACTIONS */
878 len += nla_total_size(sizeof(struct ovs_flow_stats)); /* OVS_FLOW_ATTR_STATS */
879 len += nla_total_size(1); /* OVS_FLOW_ATTR_TCP_FLAGS */
880 len += nla_total_size(8); /* OVS_FLOW_ATTR_USED */
881 return genlmsg_new(NLMSG_ALIGN(sizeof(struct ovs_header)) + len, GFP_KERNEL);
884 static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow, struct datapath *dp,
885 u32 pid, u32 seq, u8 cmd)
890 skb = ovs_flow_cmd_alloc_info(flow);
892 return ERR_PTR(-ENOMEM);
894 retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd);
899 static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
901 struct nlattr **a = info->attrs;
902 struct ovs_header *ovs_header = info->userhdr;
903 struct sw_flow_key key;
904 struct sw_flow *flow;
905 struct sk_buff *reply;
907 struct flow_table *table;
913 if (!a[OVS_FLOW_ATTR_KEY])
915 error = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
919 /* Validate actions. */
920 if (a[OVS_FLOW_ATTR_ACTIONS]) {
921 error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], 0);
924 } else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
929 dp = get_dp(ovs_header->dp_ifindex);
934 table = get_table_protected(dp);
935 flow = flow_tbl_lookup(table, &key, key_len);
937 struct sw_flow_actions *acts;
939 /* Bail out if we're not allowed to create a new flow. */
941 if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
944 /* Expand table, if necessary, to make room. */
945 if (flow_tbl_need_to_expand(table)) {
946 struct flow_table *new_table;
948 new_table = flow_tbl_expand(table);
949 if (!IS_ERR(new_table)) {
950 rcu_assign_pointer(dp->table, new_table);
951 flow_tbl_deferred_destroy(table);
952 table = get_table_protected(dp);
959 error = PTR_ERR(flow);
965 if (a[OVS_FLOW_ATTR_UPCALL_PID])
966 flow->upcall_pid = nla_get_u32(a[OVS_FLOW_ATTR_UPCALL_PID]);
968 flow->upcall_pid = NETLINK_CB(skb).pid;
970 /* Obtain actions. */
971 acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
972 error = PTR_ERR(acts);
974 goto error_free_flow;
975 rcu_assign_pointer(flow->sf_acts, acts);
977 /* Put flow in bucket. */
978 flow->hash = flow_hash(&key, key_len);
979 flow_tbl_insert(table, flow);
981 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
982 info->snd_seq, OVS_FLOW_CMD_NEW);
984 /* We found a matching flow. */
985 struct sw_flow_actions *old_acts;
987 /* Bail out if we're not allowed to modify an existing flow.
988 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
989 * because Generic Netlink treats the latter as a dump
990 * request. We also accept NLM_F_EXCL in case that bug ever
994 if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
995 info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
998 /* Update actions. */
999 old_acts = rcu_dereference_protected(flow->sf_acts,
1000 lockdep_genl_is_held());
1001 if (a[OVS_FLOW_ATTR_ACTIONS] &&
1002 (old_acts->actions_len != nla_len(a[OVS_FLOW_ATTR_ACTIONS]) ||
1003 memcmp(old_acts->actions, nla_data(a[OVS_FLOW_ATTR_ACTIONS]),
1004 old_acts->actions_len))) {
1005 struct sw_flow_actions *new_acts;
1007 new_acts = flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
1008 error = PTR_ERR(new_acts);
1009 if (IS_ERR(new_acts))
1012 rcu_assign_pointer(flow->sf_acts, new_acts);
1013 flow_deferred_free_acts(old_acts);
1016 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
1017 info->snd_seq, OVS_FLOW_CMD_NEW);
1019 if (a[OVS_FLOW_ATTR_UPCALL_PID])
1020 flow->upcall_pid = nla_get_u32(a[OVS_FLOW_ATTR_UPCALL_PID]);
1023 if (a[OVS_FLOW_ATTR_CLEAR]) {
1024 spin_lock_bh(&flow->lock);
1026 spin_unlock_bh(&flow->lock);
1031 genl_notify(reply, genl_info_net(info), info->snd_pid,
1032 dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1034 netlink_set_err(INIT_NET_GENL_SOCK, 0,
1035 dp_flow_multicast_group.id, PTR_ERR(reply));
1044 static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
1046 struct nlattr **a = info->attrs;
1047 struct ovs_header *ovs_header = info->userhdr;
1048 struct sw_flow_key key;
1049 struct sk_buff *reply;
1050 struct sw_flow *flow;
1051 struct datapath *dp;
1052 struct flow_table *table;
1056 if (!a[OVS_FLOW_ATTR_KEY])
1058 err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1062 dp = get_dp(ovs_header->dp_ifindex);
1066 table = get_table_protected(dp);
1067 flow = flow_tbl_lookup(table, &key, key_len);
1071 reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid, info->snd_seq, OVS_FLOW_CMD_NEW);
1073 return PTR_ERR(reply);
1075 return genlmsg_reply(reply, info);
1078 static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
1080 struct nlattr **a = info->attrs;
1081 struct ovs_header *ovs_header = info->userhdr;
1082 struct sw_flow_key key;
1083 struct sk_buff *reply;
1084 struct sw_flow *flow;
1085 struct datapath *dp;
1086 struct flow_table *table;
1090 if (!a[OVS_FLOW_ATTR_KEY])
1091 return flush_flows(ovs_header->dp_ifindex);
1092 err = flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
1096 dp = get_dp(ovs_header->dp_ifindex);
1100 table = get_table_protected(dp);
1101 flow = flow_tbl_lookup(table, &key, key_len);
1105 reply = ovs_flow_cmd_alloc_info(flow);
1109 flow_tbl_remove(table, flow);
1111 err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid,
1112 info->snd_seq, 0, OVS_FLOW_CMD_DEL);
1115 flow_deferred_free(flow);
1117 genl_notify(reply, genl_info_net(info), info->snd_pid,
1118 dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
1122 static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1124 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1125 struct datapath *dp;
1127 dp = get_dp(ovs_header->dp_ifindex);
1132 struct sw_flow *flow;
1135 bucket = cb->args[0];
1137 flow = flow_tbl_next(get_table_protected(dp), &bucket, &obj);
1141 if (ovs_flow_cmd_fill_info(flow, dp, skb, NETLINK_CB(cb->skb).pid,
1142 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1143 OVS_FLOW_CMD_NEW) < 0)
1146 cb->args[0] = bucket;
1152 static struct genl_ops dp_flow_genl_ops[] = {
1153 { .cmd = OVS_FLOW_CMD_NEW,
1154 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1155 .policy = flow_policy,
1156 .doit = ovs_flow_cmd_new_or_set
1158 { .cmd = OVS_FLOW_CMD_DEL,
1159 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1160 .policy = flow_policy,
1161 .doit = ovs_flow_cmd_del
1163 { .cmd = OVS_FLOW_CMD_GET,
1164 .flags = 0, /* OK for unprivileged users. */
1165 .policy = flow_policy,
1166 .doit = ovs_flow_cmd_get,
1167 .dumpit = ovs_flow_cmd_dump
1169 { .cmd = OVS_FLOW_CMD_SET,
1170 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1171 .policy = flow_policy,
1172 .doit = ovs_flow_cmd_new_or_set,
1176 static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
1177 #ifdef HAVE_NLA_NUL_STRING
1178 [OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1180 [OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1181 [OVS_DP_ATTR_IPV4_FRAGS] = { .type = NLA_U32 },
1184 static struct genl_family dp_datapath_genl_family = {
1185 .id = GENL_ID_GENERATE,
1186 .hdrsize = sizeof(struct ovs_header),
1187 .name = OVS_DATAPATH_FAMILY,
1189 .maxattr = OVS_DP_ATTR_MAX
1192 static struct genl_multicast_group dp_datapath_multicast_group = {
1193 .name = OVS_DATAPATH_MCGROUP
1196 static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
1197 u32 pid, u32 seq, u32 flags, u8 cmd)
1199 struct ovs_header *ovs_header;
1203 ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family,
1208 ovs_header->dp_ifindex = get_dpifindex(dp);
1211 err = nla_put_string(skb, OVS_DP_ATTR_NAME, dp_name(dp));
1214 goto nla_put_failure;
1216 nla = nla_reserve(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats));
1218 goto nla_put_failure;
1219 get_dp_stats(dp, nla_data(nla));
1221 NLA_PUT_U32(skb, OVS_DP_ATTR_IPV4_FRAGS,
1222 dp->drop_frags ? OVS_DP_FRAG_DROP : OVS_DP_FRAG_ZERO);
1224 return genlmsg_end(skb, ovs_header);
1227 genlmsg_cancel(skb, ovs_header);
1232 static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
1235 struct sk_buff *skb;
1238 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1240 return ERR_PTR(-ENOMEM);
1242 retval = ovs_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd);
1245 return ERR_PTR(retval);
1250 static int ovs_dp_cmd_validate(struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1252 if (a[OVS_DP_ATTR_IPV4_FRAGS]) {
1253 u32 frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]);
1255 if (frags != OVS_DP_FRAG_ZERO && frags != OVS_DP_FRAG_DROP)
1259 return CHECK_NUL_STRING(a[OVS_DP_ATTR_NAME], IFNAMSIZ - 1);
1262 /* Called with genl_mutex and optionally with RTNL lock also. */
1263 static struct datapath *lookup_datapath(struct ovs_header *ovs_header, struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1265 struct datapath *dp;
1267 if (!a[OVS_DP_ATTR_NAME])
1268 dp = get_dp(ovs_header->dp_ifindex);
1270 struct vport *vport;
1273 vport = vport_locate(nla_data(a[OVS_DP_ATTR_NAME]));
1274 dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
1277 return dp ? dp : ERR_PTR(-ENODEV);
1280 /* Called with genl_mutex. */
1281 static void change_datapath(struct datapath *dp, struct nlattr *a[OVS_DP_ATTR_MAX + 1])
1283 if (a[OVS_DP_ATTR_IPV4_FRAGS])
1284 dp->drop_frags = nla_get_u32(a[OVS_DP_ATTR_IPV4_FRAGS]) == OVS_DP_FRAG_DROP;
1287 static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
1289 struct nlattr **a = info->attrs;
1290 struct vport_parms parms;
1291 struct sk_buff *reply;
1292 struct datapath *dp;
1293 struct vport *vport;
1297 if (!a[OVS_DP_ATTR_NAME])
1300 err = ovs_dp_cmd_validate(a);
1306 if (!try_module_get(THIS_MODULE))
1307 goto err_unlock_rtnl;
1310 dp = kzalloc(sizeof(*dp), GFP_KERNEL);
1312 goto err_put_module;
1313 INIT_LIST_HEAD(&dp->port_list);
1315 /* Initialize kobject for bridge. This will be added as
1316 * /sys/class/net/<devname>/brif later, if sysfs is enabled. */
1317 dp->ifobj.kset = NULL;
1318 kobject_init(&dp->ifobj, &dp_ktype);
1320 /* Allocate table. */
1322 rcu_assign_pointer(dp->table, flow_tbl_alloc(TBL_MIN_BUCKETS));
1327 dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
1328 if (!dp->stats_percpu) {
1330 goto err_destroy_table;
1333 change_datapath(dp, a);
1335 /* Set up our datapath device. */
1336 parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
1337 parms.type = OVS_VPORT_TYPE_INTERNAL;
1338 parms.options = NULL;
1340 parms.port_no = OVSP_LOCAL;
1341 if (a[OVS_DP_ATTR_UPCALL_PID])
1342 parms.upcall_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
1344 parms.upcall_pid = NETLINK_CB(skb).pid;
1346 vport = new_vport(&parms);
1347 if (IS_ERR(vport)) {
1348 err = PTR_ERR(vport);
1352 goto err_destroy_percpu;
1355 reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW);
1356 err = PTR_ERR(reply);
1358 goto err_destroy_local_port;
1360 list_add_tail(&dp->list_node, &dps);
1361 dp_sysfs_add_dp(dp);
1365 genl_notify(reply, genl_info_net(info), info->snd_pid,
1366 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1369 err_destroy_local_port:
1370 dp_detach_port(get_vport_protected(dp, OVSP_LOCAL));
1372 free_percpu(dp->stats_percpu);
1374 flow_tbl_destroy(get_table_protected(dp));
1378 module_put(THIS_MODULE);
1385 static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
1387 struct vport *vport, *next_vport;
1388 struct sk_buff *reply;
1389 struct datapath *dp;
1392 err = ovs_dp_cmd_validate(info->attrs);
1397 dp = lookup_datapath(info->userhdr, info->attrs);
1402 reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_DEL);
1403 err = PTR_ERR(reply);
1407 list_for_each_entry_safe (vport, next_vport, &dp->port_list, node)
1408 if (vport->port_no != OVSP_LOCAL)
1409 dp_detach_port(vport);
1411 dp_sysfs_del_dp(dp);
1412 list_del(&dp->list_node);
1413 dp_detach_port(get_vport_protected(dp, OVSP_LOCAL));
1415 /* rtnl_unlock() will wait until all the references to devices that
1416 * are pending unregistration have been dropped. We do it here to
1417 * ensure that any internal devices (which contain DP pointers) are
1418 * fully destroyed before freeing the datapath.
1422 call_rcu(&dp->rcu, destroy_dp_rcu);
1423 module_put(THIS_MODULE);
1425 genl_notify(reply, genl_info_net(info), info->snd_pid,
1426 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1436 static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
1438 struct sk_buff *reply;
1439 struct datapath *dp;
1442 err = ovs_dp_cmd_validate(info->attrs);
1446 dp = lookup_datapath(info->userhdr, info->attrs);
1450 change_datapath(dp, info->attrs);
1452 reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW);
1453 if (IS_ERR(reply)) {
1454 err = PTR_ERR(reply);
1455 netlink_set_err(INIT_NET_GENL_SOCK, 0,
1456 dp_datapath_multicast_group.id, err);
1460 genl_notify(reply, genl_info_net(info), info->snd_pid,
1461 dp_datapath_multicast_group.id, info->nlhdr, GFP_KERNEL);
1465 static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
1467 struct sk_buff *reply;
1468 struct datapath *dp;
1471 err = ovs_dp_cmd_validate(info->attrs);
1475 dp = lookup_datapath(info->userhdr, info->attrs);
1479 reply = ovs_dp_cmd_build_info(dp, info->snd_pid, info->snd_seq, OVS_DP_CMD_NEW);
1481 return PTR_ERR(reply);
1483 return genlmsg_reply(reply, info);
1486 static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1488 struct datapath *dp;
1489 int skip = cb->args[0];
1492 list_for_each_entry (dp, &dps, list_node) {
1495 if (ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
1496 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1497 OVS_DP_CMD_NEW) < 0)
1507 static struct genl_ops dp_datapath_genl_ops[] = {
1508 { .cmd = OVS_DP_CMD_NEW,
1509 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1510 .policy = datapath_policy,
1511 .doit = ovs_dp_cmd_new
1513 { .cmd = OVS_DP_CMD_DEL,
1514 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1515 .policy = datapath_policy,
1516 .doit = ovs_dp_cmd_del
1518 { .cmd = OVS_DP_CMD_GET,
1519 .flags = 0, /* OK for unprivileged users. */
1520 .policy = datapath_policy,
1521 .doit = ovs_dp_cmd_get,
1522 .dumpit = ovs_dp_cmd_dump
1524 { .cmd = OVS_DP_CMD_SET,
1525 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1526 .policy = datapath_policy,
1527 .doit = ovs_dp_cmd_set,
1531 static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
1532 #ifdef HAVE_NLA_NUL_STRING
1533 [OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
1534 [OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
1535 [OVS_VPORT_ATTR_ADDRESS] = { .len = ETH_ALEN },
1537 [OVS_VPORT_ATTR_STATS] = { .minlen = sizeof(struct ovs_vport_stats) },
1538 [OVS_VPORT_ATTR_ADDRESS] = { .minlen = ETH_ALEN },
1540 [OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
1541 [OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
1542 [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_U32 },
1543 [OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
1546 static struct genl_family dp_vport_genl_family = {
1547 .id = GENL_ID_GENERATE,
1548 .hdrsize = sizeof(struct ovs_header),
1549 .name = OVS_VPORT_FAMILY,
1551 .maxattr = OVS_VPORT_ATTR_MAX
1554 struct genl_multicast_group dp_vport_multicast_group = {
1555 .name = OVS_VPORT_MCGROUP
1558 /* Called with RTNL lock or RCU read lock. */
1559 static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
1560 u32 pid, u32 seq, u32 flags, u8 cmd)
1562 struct ovs_header *ovs_header;
1567 ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family,
1572 ovs_header->dp_ifindex = get_dpifindex(vport->dp);
1574 NLA_PUT_U32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no);
1575 NLA_PUT_U32(skb, OVS_VPORT_ATTR_TYPE, vport_get_type(vport));
1576 NLA_PUT_STRING(skb, OVS_VPORT_ATTR_NAME, vport_get_name(vport));
1577 NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid);
1579 nla = nla_reserve(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats));
1581 goto nla_put_failure;
1583 vport_get_stats(vport, nla_data(nla));
1585 NLA_PUT(skb, OVS_VPORT_ATTR_ADDRESS, ETH_ALEN, vport_get_addr(vport));
1587 err = vport_get_options(vport, skb);
1588 if (err == -EMSGSIZE)
1591 ifindex = vport_get_ifindex(vport);
1593 NLA_PUT_U32(skb, OVS_VPORT_ATTR_IFINDEX, ifindex);
1595 return genlmsg_end(skb, ovs_header);
1600 genlmsg_cancel(skb, ovs_header);
1604 /* Called with RTNL lock or RCU read lock. */
1605 struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
1608 struct sk_buff *skb;
1611 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1613 return ERR_PTR(-ENOMEM);
1615 retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd);
1618 return ERR_PTR(retval);
1623 static int ovs_vport_cmd_validate(struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1625 return CHECK_NUL_STRING(a[OVS_VPORT_ATTR_NAME], IFNAMSIZ - 1);
1628 /* Called with RTNL lock or RCU read lock. */
1629 static struct vport *lookup_vport(struct ovs_header *ovs_header,
1630 struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1632 struct datapath *dp;
1633 struct vport *vport;
1635 if (a[OVS_VPORT_ATTR_NAME]) {
1636 vport = vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
1638 return ERR_PTR(-ENODEV);
1640 } else if (a[OVS_VPORT_ATTR_PORT_NO]) {
1641 u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1643 if (port_no >= DP_MAX_PORTS)
1644 return ERR_PTR(-EFBIG);
1646 dp = get_dp(ovs_header->dp_ifindex);
1648 return ERR_PTR(-ENODEV);
1650 vport = get_vport_protected(dp, port_no);
1652 return ERR_PTR(-ENOENT);
1655 return ERR_PTR(-EINVAL);
1658 /* Called with RTNL lock. */
1659 static int change_vport(struct vport *vport, struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
1663 if (a[OVS_VPORT_ATTR_STATS])
1664 vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));
1666 if (a[OVS_VPORT_ATTR_ADDRESS])
1667 err = vport_set_addr(vport, nla_data(a[OVS_VPORT_ATTR_ADDRESS]));
1672 static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
1674 struct nlattr **a = info->attrs;
1675 struct ovs_header *ovs_header = info->userhdr;
1676 struct vport_parms parms;
1677 struct sk_buff *reply;
1678 struct vport *vport;
1679 struct datapath *dp;
1684 if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE])
1687 err = ovs_vport_cmd_validate(a);
1692 dp = get_dp(ovs_header->dp_ifindex);
1697 if (a[OVS_VPORT_ATTR_PORT_NO]) {
1698 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
1701 if (port_no >= DP_MAX_PORTS)
1704 vport = get_vport_protected(dp, port_no);
1709 for (port_no = 1; ; port_no++) {
1710 if (port_no >= DP_MAX_PORTS) {
1714 vport = get_vport_protected(dp, port_no);
1720 parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
1721 parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
1722 parms.options = a[OVS_VPORT_ATTR_OPTIONS];
1724 parms.port_no = port_no;
1725 if (a[OVS_VPORT_ATTR_UPCALL_PID])
1726 parms.upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1728 parms.upcall_pid = NETLINK_CB(skb).pid;
1730 vport = new_vport(&parms);
1731 err = PTR_ERR(vport);
1735 dp_sysfs_add_if(vport);
1737 err = change_vport(vport, a);
1739 reply = ovs_vport_cmd_build_info(vport, info->snd_pid,
1740 info->snd_seq, OVS_VPORT_CMD_NEW);
1742 err = PTR_ERR(reply);
1745 dp_detach_port(vport);
1748 genl_notify(reply, genl_info_net(info), info->snd_pid,
1749 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1758 static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
1760 struct nlattr **a = info->attrs;
1761 struct sk_buff *reply;
1762 struct vport *vport;
1765 err = ovs_vport_cmd_validate(a);
1770 vport = lookup_vport(info->userhdr, a);
1771 err = PTR_ERR(vport);
1776 if (a[OVS_VPORT_ATTR_OPTIONS])
1777 err = vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
1779 err = change_vport(vport, a);
1780 if (!err && a[OVS_VPORT_ATTR_UPCALL_PID])
1781 vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
1783 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1785 if (IS_ERR(reply)) {
1786 err = PTR_ERR(reply);
1787 netlink_set_err(INIT_NET_GENL_SOCK, 0,
1788 dp_vport_multicast_group.id, err);
1792 genl_notify(reply, genl_info_net(info), info->snd_pid,
1793 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1801 static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
1803 struct nlattr **a = info->attrs;
1804 struct sk_buff *reply;
1805 struct vport *vport;
1808 err = ovs_vport_cmd_validate(a);
1813 vport = lookup_vport(info->userhdr, a);
1814 err = PTR_ERR(vport);
1818 if (vport->port_no == OVSP_LOCAL) {
1823 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1825 err = PTR_ERR(reply);
1829 dp_detach_port(vport);
1831 genl_notify(reply, genl_info_net(info), info->snd_pid,
1832 dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
1840 static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
1842 struct nlattr **a = info->attrs;
1843 struct ovs_header *ovs_header = info->userhdr;
1844 struct sk_buff *reply;
1845 struct vport *vport;
1848 err = ovs_vport_cmd_validate(a);
1853 vport = lookup_vport(ovs_header, a);
1854 err = PTR_ERR(vport);
1858 reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
1860 err = PTR_ERR(reply);
1866 return genlmsg_reply(reply, info);
1874 static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
1876 struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
1877 struct datapath *dp;
1881 dp = get_dp(ovs_header->dp_ifindex);
1886 for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) {
1887 struct vport *vport;
1889 vport = get_vport_protected(dp, port_no);
1893 if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid,
1894 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1895 OVS_VPORT_CMD_NEW) < 0)
1900 cb->args[0] = port_no;
1906 static struct genl_ops dp_vport_genl_ops[] = {
1907 { .cmd = OVS_VPORT_CMD_NEW,
1908 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1909 .policy = vport_policy,
1910 .doit = ovs_vport_cmd_new
1912 { .cmd = OVS_VPORT_CMD_DEL,
1913 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1914 .policy = vport_policy,
1915 .doit = ovs_vport_cmd_del
1917 { .cmd = OVS_VPORT_CMD_GET,
1918 .flags = 0, /* OK for unprivileged users. */
1919 .policy = vport_policy,
1920 .doit = ovs_vport_cmd_get,
1921 .dumpit = ovs_vport_cmd_dump
1923 { .cmd = OVS_VPORT_CMD_SET,
1924 .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
1925 .policy = vport_policy,
1926 .doit = ovs_vport_cmd_set,
1930 struct genl_family_and_ops {
1931 struct genl_family *family;
1932 struct genl_ops *ops;
1934 struct genl_multicast_group *group;
1937 static const struct genl_family_and_ops dp_genl_families[] = {
1938 { &dp_datapath_genl_family,
1939 dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
1940 &dp_datapath_multicast_group },
1941 { &dp_vport_genl_family,
1942 dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
1943 &dp_vport_multicast_group },
1944 { &dp_flow_genl_family,
1945 dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
1946 &dp_flow_multicast_group },
1947 { &dp_packet_genl_family,
1948 dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
1952 static void dp_unregister_genl(int n_families)
1956 for (i = 0; i < n_families; i++)
1957 genl_unregister_family(dp_genl_families[i].family);
1960 static int dp_register_genl(void)
1967 for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
1968 const struct genl_family_and_ops *f = &dp_genl_families[i];
1970 err = genl_register_family_with_ops(f->family, f->ops,
1977 err = genl_register_mc_group(f->family, f->group);
1986 dp_unregister_genl(n_registered);
1990 static int __init dp_init(void)
1992 struct sk_buff *dummy_skb;
1995 BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb));
1997 printk("Open vSwitch %s, built "__DATE__" "__TIME__"\n", VERSION BUILDNR);
2005 goto error_tnl_exit;
2009 goto error_flow_exit;
2011 err = register_netdevice_notifier(&dp_device_notifier);
2013 goto error_vport_exit;
2015 err = dp_register_genl();
2017 goto error_unreg_notifier;
2021 error_unreg_notifier:
2022 unregister_netdevice_notifier(&dp_device_notifier);
2033 static void dp_cleanup(void)
2036 dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
2037 unregister_netdevice_notifier(&dp_device_notifier);
2043 module_init(dp_init);
2044 module_exit(dp_cleanup);
2046 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2047 MODULE_LICENSE("GPL");