2 * Copyright (c) 2007-2014 Nicira, Inc.
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/ethtool.h>
40 #include <linux/wait.h>
41 #include <asm/div64.h>
42 #include <linux/highmem.h>
43 #include <linux/netfilter_bridge.h>
44 #include <linux/netfilter_ipv4.h>
45 #include <linux/inetdevice.h>
46 #include <linux/list.h>
47 #include <linux/openvswitch.h>
48 #include <linux/rculist.h>
49 #include <linux/dmi.h>
50 #include <net/genetlink.h>
51 #include <net/net_namespace.h>
52 #include <net/netns/generic.h>
56 #include "flow_table.h"
57 #include "flow_netlink.h"
58 #include "vport-internal_dev.h"
59 #include "vport-netdev.h"
61 unsigned int ovs_net_id __read_mostly
;
63 static struct genl_family dp_packet_genl_family
;
64 static struct genl_family dp_flow_genl_family
;
65 static struct genl_family dp_datapath_genl_family
;
67 static const struct nla_policy flow_policy
[];
69 static const struct genl_multicast_group ovs_dp_flow_multicast_group
= {
70 .name
= OVS_FLOW_MCGROUP
,
73 static const struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
74 .name
= OVS_DATAPATH_MCGROUP
,
77 static const struct genl_multicast_group ovs_dp_vport_multicast_group
= {
78 .name
= OVS_VPORT_MCGROUP
,
81 /* Check if need to build a reply message.
82 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
83 static bool ovs_must_notify(struct genl_family
*family
, struct genl_info
*info
,
86 return info
->nlhdr
->nlmsg_flags
& NLM_F_ECHO
||
87 genl_has_listeners(family
, genl_info_net(info
), group
);
90 static void ovs_notify(struct genl_family
*family
,
91 struct sk_buff
*skb
, struct genl_info
*info
)
93 genl_notify(family
, skb
, info
, 0, GFP_KERNEL
);
99 * All writes e.g. Writes to device state (add/remove datapath, port, set
100 * operations on vports, etc.), Writes to other state (flow table
101 * modifications, set miscellaneous datapath parameters, etc.) are protected
104 * Reads are protected by RCU.
106 * There are a few special cases (mostly stats) that have their own
107 * synchronization but they nest under all of above and don't interact with
110 * The RTNL lock nests inside ovs_mutex.
113 static DEFINE_MUTEX(ovs_mutex
);
117 mutex_lock(&ovs_mutex
);
120 void ovs_unlock(void)
122 mutex_unlock(&ovs_mutex
);
125 #ifdef CONFIG_LOCKDEP
126 int lockdep_ovsl_is_held(void)
129 return lockdep_is_held(&ovs_mutex
);
135 static struct vport
*new_vport(const struct vport_parms
*);
136 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
137 const struct sw_flow_key
*,
138 const struct dp_upcall_info
*,
140 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
141 const struct sw_flow_key
*,
142 const struct dp_upcall_info
*,
145 /* Must be called with rcu_read_lock. */
146 static struct datapath
*get_dp_rcu(struct net
*net
, int dp_ifindex
)
148 struct net_device
*dev
= dev_get_by_index_rcu(net
, dp_ifindex
);
151 struct vport
*vport
= ovs_internal_dev_get_vport(dev
);
159 /* The caller must hold either ovs_mutex or rcu_read_lock to keep the
160 * returned dp pointer valid.
162 static inline struct datapath
*get_dp(struct net
*net
, int dp_ifindex
)
166 WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held());
168 dp
= get_dp_rcu(net
, dp_ifindex
);
174 /* Must be called with rcu_read_lock or ovs_mutex. */
175 const char *ovs_dp_name(const struct datapath
*dp
)
177 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
178 return ovs_vport_name(vport
);
181 static int get_dpifindex(const struct datapath
*dp
)
188 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
190 ifindex
= local
->dev
->ifindex
;
199 static void destroy_dp_rcu(struct rcu_head
*rcu
)
201 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
203 ovs_flow_tbl_destroy(&dp
->table
);
204 free_percpu(dp
->stats_percpu
);
209 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
212 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
215 /* Called with ovs_mutex or RCU read lock. */
216 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
219 struct hlist_head
*head
;
221 head
= vport_hash_bucket(dp
, port_no
);
222 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
223 if (vport
->port_no
== port_no
)
229 /* Called with ovs_mutex. */
230 static struct vport
*new_vport(const struct vport_parms
*parms
)
234 vport
= ovs_vport_add(parms
);
235 if (!IS_ERR(vport
)) {
236 struct datapath
*dp
= parms
->dp
;
237 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
239 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
244 void ovs_dp_detach_port(struct vport
*p
)
248 /* First drop references to device. */
249 hlist_del_rcu(&p
->dp_hash_node
);
251 /* Then destroy it. */
255 /* Must be called with rcu_read_lock. */
256 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
258 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
259 struct datapath
*dp
= p
->dp
;
260 struct sw_flow
*flow
;
261 struct sw_flow_actions
*sf_acts
;
262 struct dp_stats_percpu
*stats
;
266 stats
= this_cpu_ptr(dp
->stats_percpu
);
269 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, &n_mask_hit
);
270 if (unlikely(!flow
)) {
271 struct dp_upcall_info upcall
;
274 memset(&upcall
, 0, sizeof(upcall
));
275 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
276 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
277 upcall
.mru
= OVS_CB(skb
)->mru
;
278 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
, 0);
283 stats_counter
= &stats
->n_missed
;
287 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
288 sf_acts
= rcu_dereference(flow
->sf_acts
);
289 ovs_execute_actions(dp
, skb
, sf_acts
, key
);
291 stats_counter
= &stats
->n_hit
;
294 /* Update datapath statistics. */
295 u64_stats_update_begin(&stats
->syncp
);
297 stats
->n_mask_hit
+= n_mask_hit
;
298 u64_stats_update_end(&stats
->syncp
);
301 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
302 const struct sw_flow_key
*key
,
303 const struct dp_upcall_info
*upcall_info
,
306 struct dp_stats_percpu
*stats
;
309 if (upcall_info
->portid
== 0) {
314 if (!skb_is_gso(skb
))
315 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
317 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
324 stats
= this_cpu_ptr(dp
->stats_percpu
);
326 u64_stats_update_begin(&stats
->syncp
);
328 u64_stats_update_end(&stats
->syncp
);
333 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
334 const struct sw_flow_key
*key
,
335 const struct dp_upcall_info
*upcall_info
,
338 unsigned short gso_type
= skb_shinfo(skb
)->gso_type
;
339 struct sw_flow_key later_key
;
340 struct sk_buff
*segs
, *nskb
;
343 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
344 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
346 return PTR_ERR(segs
);
350 if (gso_type
& SKB_GSO_UDP
) {
351 /* The initial flow key extracted by ovs_flow_key_extract()
352 * in this case is for a first fragment, so we need to
353 * properly mark later fragments.
356 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
359 /* Queue all of the segments. */
362 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
365 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
369 } while ((skb
= skb
->next
));
371 /* Free all of the segments. */
379 } while ((skb
= nskb
));
383 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
384 unsigned int hdrlen
, int actions_attrlen
)
386 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
387 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
388 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
389 + nla_total_size(sizeof(unsigned int)); /* OVS_PACKET_ATTR_LEN */
391 /* OVS_PACKET_ATTR_USERDATA */
392 if (upcall_info
->userdata
)
393 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
395 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
396 if (upcall_info
->egress_tun_info
)
397 size
+= nla_total_size(ovs_tun_key_attr_size());
399 /* OVS_PACKET_ATTR_ACTIONS */
400 if (upcall_info
->actions_len
)
401 size
+= nla_total_size(actions_attrlen
);
403 /* OVS_PACKET_ATTR_MRU */
404 if (upcall_info
->mru
)
405 size
+= nla_total_size(sizeof(upcall_info
->mru
));
410 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
412 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
413 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
416 skb_put_zero(skb
, plen
);
420 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
421 const struct sw_flow_key
*key
,
422 const struct dp_upcall_info
*upcall_info
,
425 struct ovs_header
*upcall
;
426 struct sk_buff
*nskb
= NULL
;
427 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
433 dp_ifindex
= get_dpifindex(dp
);
437 if (skb_vlan_tag_present(skb
)) {
438 nskb
= skb_clone(skb
, GFP_ATOMIC
);
442 nskb
= __vlan_hwaccel_push_inside(nskb
);
449 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
454 /* Complete checksum if needed */
455 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
456 (err
= skb_csum_hwoffload_help(skb
, 0)))
459 /* Older versions of OVS user space enforce alignment of the last
460 * Netlink attribute to NLA_ALIGNTO which would require extensive
461 * padding logic. Only perform zerocopy if padding is not required.
463 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
464 hlen
= skb_zerocopy_headlen(skb
);
468 len
= upcall_msg_size(upcall_info
, hlen
- cutlen
,
469 OVS_CB(skb
)->acts_origlen
);
470 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
476 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
477 0, upcall_info
->cmd
);
478 upcall
->dp_ifindex
= dp_ifindex
;
480 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
483 if (upcall_info
->userdata
)
484 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
485 nla_len(upcall_info
->userdata
),
486 nla_data(upcall_info
->userdata
));
488 if (upcall_info
->egress_tun_info
) {
489 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
490 err
= ovs_nla_put_tunnel_info(user_skb
,
491 upcall_info
->egress_tun_info
);
493 nla_nest_end(user_skb
, nla
);
496 if (upcall_info
->actions_len
) {
497 nla
= nla_nest_start(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
498 err
= ovs_nla_put_actions(upcall_info
->actions
,
499 upcall_info
->actions_len
,
502 nla_nest_end(user_skb
, nla
);
504 nla_nest_cancel(user_skb
, nla
);
507 /* Add OVS_PACKET_ATTR_MRU */
508 if (upcall_info
->mru
) {
509 if (nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
,
514 pad_packet(dp
, user_skb
);
517 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
519 if (nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
,
524 pad_packet(dp
, user_skb
);
527 /* Only reserve room for attribute header, packet data is added
528 * in skb_zerocopy() */
529 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
533 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
535 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
539 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
540 pad_packet(dp
, user_skb
);
542 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
544 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
554 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
556 struct ovs_header
*ovs_header
= info
->userhdr
;
557 struct net
*net
= sock_net(skb
->sk
);
558 struct nlattr
**a
= info
->attrs
;
559 struct sw_flow_actions
*acts
;
560 struct sk_buff
*packet
;
561 struct sw_flow
*flow
;
562 struct sw_flow_actions
*sf_acts
;
564 struct vport
*input_vport
;
568 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
571 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
572 !a
[OVS_PACKET_ATTR_ACTIONS
])
575 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
576 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
580 skb_reserve(packet
, NET_IP_ALIGN
);
582 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
584 /* Set packet's mru */
585 if (a
[OVS_PACKET_ATTR_MRU
]) {
586 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
587 packet
->ignore_df
= 1;
589 OVS_CB(packet
)->mru
= mru
;
591 /* Build an sw_flow for sending this packet. */
592 flow
= ovs_flow_alloc();
597 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
598 packet
, &flow
->key
, log
);
602 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
603 &flow
->key
, &acts
, log
);
607 rcu_assign_pointer(flow
->sf_acts
, acts
);
608 packet
->priority
= flow
->key
.phy
.priority
;
609 packet
->mark
= flow
->key
.phy
.skb_mark
;
612 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
617 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
619 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
624 packet
->dev
= input_vport
->dev
;
625 OVS_CB(packet
)->input_vport
= input_vport
;
626 sf_acts
= rcu_dereference(flow
->sf_acts
);
629 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
633 ovs_flow_free(flow
, false);
639 ovs_flow_free(flow
, false);
646 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
647 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
648 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
649 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
650 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
651 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
654 static const struct genl_ops dp_packet_genl_ops
[] = {
655 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
656 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
657 .policy
= packet_policy
,
658 .doit
= ovs_packet_cmd_execute
662 static struct genl_family dp_packet_genl_family __ro_after_init
= {
663 .hdrsize
= sizeof(struct ovs_header
),
664 .name
= OVS_PACKET_FAMILY
,
665 .version
= OVS_PACKET_VERSION
,
666 .maxattr
= OVS_PACKET_ATTR_MAX
,
668 .parallel_ops
= true,
669 .ops
= dp_packet_genl_ops
,
670 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
671 .module
= THIS_MODULE
,
674 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
675 struct ovs_dp_megaflow_stats
*mega_stats
)
679 memset(mega_stats
, 0, sizeof(*mega_stats
));
681 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
682 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
684 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
686 for_each_possible_cpu(i
) {
687 const struct dp_stats_percpu
*percpu_stats
;
688 struct dp_stats_percpu local_stats
;
691 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
694 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
695 local_stats
= *percpu_stats
;
696 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
698 stats
->n_hit
+= local_stats
.n_hit
;
699 stats
->n_missed
+= local_stats
.n_missed
;
700 stats
->n_lost
+= local_stats
.n_lost
;
701 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
705 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
707 return ovs_identifier_is_ufid(sfid
) &&
708 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
711 static bool should_fill_mask(uint32_t ufid_flags
)
713 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
716 static bool should_fill_actions(uint32_t ufid_flags
)
718 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
721 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
722 const struct sw_flow_id
*sfid
,
725 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
727 /* OVS_FLOW_ATTR_UFID */
728 if (sfid
&& ovs_identifier_is_ufid(sfid
))
729 len
+= nla_total_size(sfid
->ufid_len
);
731 /* OVS_FLOW_ATTR_KEY */
732 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
733 len
+= nla_total_size(ovs_key_attr_size());
735 /* OVS_FLOW_ATTR_MASK */
736 if (should_fill_mask(ufid_flags
))
737 len
+= nla_total_size(ovs_key_attr_size());
739 /* OVS_FLOW_ATTR_ACTIONS */
740 if (should_fill_actions(ufid_flags
))
741 len
+= nla_total_size(acts
->orig_len
);
744 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
745 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
746 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
749 /* Called with ovs_mutex or RCU read lock. */
750 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
753 struct ovs_flow_stats stats
;
757 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
760 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
764 if (stats
.n_packets
&&
765 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
766 sizeof(struct ovs_flow_stats
), &stats
,
770 if ((u8
)ntohs(tcp_flags
) &&
771 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
777 /* Called with ovs_mutex or RCU read lock. */
778 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
779 struct sk_buff
*skb
, int skb_orig_len
)
781 struct nlattr
*start
;
784 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
785 * this is the first flow to be dumped into 'skb'. This is unusual for
786 * Netlink but individual action lists can be longer than
787 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
788 * The userspace caller can always fetch the actions separately if it
789 * really wants them. (Most userspace callers in fact don't care.)
791 * This can only fail for dump operations because the skb is always
792 * properly sized for single flows.
794 start
= nla_nest_start(skb
, OVS_FLOW_ATTR_ACTIONS
);
796 const struct sw_flow_actions
*sf_acts
;
798 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
799 err
= ovs_nla_put_actions(sf_acts
->actions
,
800 sf_acts
->actions_len
, skb
);
803 nla_nest_end(skb
, start
);
808 nla_nest_cancel(skb
, start
);
810 } else if (skb_orig_len
) {
817 /* Called with ovs_mutex or RCU read lock. */
818 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
819 struct sk_buff
*skb
, u32 portid
,
820 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
822 const int skb_orig_len
= skb
->len
;
823 struct ovs_header
*ovs_header
;
826 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
831 ovs_header
->dp_ifindex
= dp_ifindex
;
833 err
= ovs_nla_put_identifier(flow
, skb
);
837 if (should_fill_key(&flow
->id
, ufid_flags
)) {
838 err
= ovs_nla_put_masked_key(flow
, skb
);
843 if (should_fill_mask(ufid_flags
)) {
844 err
= ovs_nla_put_mask(flow
, skb
);
849 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
853 if (should_fill_actions(ufid_flags
)) {
854 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
859 genlmsg_end(skb
, ovs_header
);
863 genlmsg_cancel(skb
, ovs_header
);
867 /* May not be called with RCU read lock. */
868 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
869 const struct sw_flow_id
*sfid
,
870 struct genl_info
*info
,
877 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
880 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
881 skb
= genlmsg_new(len
, GFP_KERNEL
);
883 return ERR_PTR(-ENOMEM
);
888 /* Called with ovs_mutex. */
889 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
891 struct genl_info
*info
, u8 cmd
,
892 bool always
, u32 ufid_flags
)
897 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
898 &flow
->id
, info
, always
, ufid_flags
);
899 if (IS_ERR_OR_NULL(skb
))
902 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
903 info
->snd_portid
, info
->snd_seq
, 0,
909 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
911 struct net
*net
= sock_net(skb
->sk
);
912 struct nlattr
**a
= info
->attrs
;
913 struct ovs_header
*ovs_header
= info
->userhdr
;
914 struct sw_flow
*flow
= NULL
, *new_flow
;
915 struct sw_flow_mask mask
;
916 struct sk_buff
*reply
;
918 struct sw_flow_actions
*acts
;
919 struct sw_flow_match match
;
920 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
922 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
924 /* Must have key and actions. */
926 if (!a
[OVS_FLOW_ATTR_KEY
]) {
927 OVS_NLERR(log
, "Flow key attr not present in new flow.");
930 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
931 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
935 /* Most of the time we need to allocate a new flow, do it before
938 new_flow
= ovs_flow_alloc();
939 if (IS_ERR(new_flow
)) {
940 error
= PTR_ERR(new_flow
);
945 ovs_match_init(&match
, &new_flow
->key
, false, &mask
);
946 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
947 a
[OVS_FLOW_ATTR_MASK
], log
);
951 /* Extract flow identifier. */
952 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
953 &new_flow
->key
, log
);
957 /* unmasked key is needed to match when ufid is not used. */
958 if (ovs_identifier_is_key(&new_flow
->id
))
959 match
.key
= new_flow
->id
.unmasked_key
;
961 ovs_flow_mask_key(&new_flow
->key
, &new_flow
->key
, true, &mask
);
963 /* Validate actions. */
964 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
965 &new_flow
->key
, &acts
, log
);
967 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
971 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
974 error
= PTR_ERR(reply
);
979 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
985 /* Check if this is a duplicate flow */
986 if (ovs_identifier_is_ufid(&new_flow
->id
))
987 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
989 flow
= ovs_flow_tbl_lookup(&dp
->table
, &new_flow
->key
);
991 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
993 /* Put flow in bucket. */
994 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
995 if (unlikely(error
)) {
1000 if (unlikely(reply
)) {
1001 error
= ovs_flow_cmd_fill_info(new_flow
,
1002 ovs_header
->dp_ifindex
,
1003 reply
, info
->snd_portid
,
1011 struct sw_flow_actions
*old_acts
;
1013 /* Bail out if we're not allowed to modify an existing flow.
1014 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1015 * because Generic Netlink treats the latter as a dump
1016 * request. We also accept NLM_F_EXCL in case that bug ever
1019 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1022 goto err_unlock_ovs
;
1024 /* The flow identifier has to be the same for flow updates.
1025 * Look for any overlapping flow.
1027 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1028 if (ovs_identifier_is_key(&flow
->id
))
1029 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1031 else /* UFID matches but key is different */
1035 goto err_unlock_ovs
;
1038 /* Update actions. */
1039 old_acts
= ovsl_dereference(flow
->sf_acts
);
1040 rcu_assign_pointer(flow
->sf_acts
, acts
);
1042 if (unlikely(reply
)) {
1043 error
= ovs_flow_cmd_fill_info(flow
,
1044 ovs_header
->dp_ifindex
,
1045 reply
, info
->snd_portid
,
1053 ovs_nla_free_flow_actions_rcu(old_acts
);
1054 ovs_flow_free(new_flow
, false);
1058 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1065 ovs_nla_free_flow_actions(acts
);
1067 ovs_flow_free(new_flow
, false);
1072 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1073 static struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1074 const struct nlattr
*a
,
1075 const struct sw_flow_key
*key
,
1076 const struct sw_flow_mask
*mask
,
1079 struct sw_flow_actions
*acts
;
1080 struct sw_flow_key masked_key
;
1083 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1084 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1087 "Actions may not be safe on all matching packets");
1088 return ERR_PTR(error
);
1094 /* Factor out match-init and action-copy to avoid
1095 * "Wframe-larger-than=1024" warning. Because mask is only
1096 * used to get actions, we new a function to save some
1099 * If there are not key and action attrs, we return 0
1100 * directly. In the case, the caller will also not use the
1101 * match as before. If there is action attr, we try to get
1102 * actions and save them to *acts. Before returning from
1103 * the function, we reset the match->mask pointer. Because
1104 * we should not to return match object with dangling reference
1107 static int ovs_nla_init_match_and_action(struct net
*net
,
1108 struct sw_flow_match
*match
,
1109 struct sw_flow_key
*key
,
1111 struct sw_flow_actions
**acts
,
1114 struct sw_flow_mask mask
;
1117 if (a
[OVS_FLOW_ATTR_KEY
]) {
1118 ovs_match_init(match
, key
, true, &mask
);
1119 error
= ovs_nla_get_match(net
, match
, a
[OVS_FLOW_ATTR_KEY
],
1120 a
[OVS_FLOW_ATTR_MASK
], log
);
1125 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1126 if (!a
[OVS_FLOW_ATTR_KEY
]) {
1128 "Flow key attribute not present in set flow.");
1132 *acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], key
,
1134 if (IS_ERR(*acts
)) {
1135 error
= PTR_ERR(*acts
);
1140 /* On success, error is 0. */
1146 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1148 struct net
*net
= sock_net(skb
->sk
);
1149 struct nlattr
**a
= info
->attrs
;
1150 struct ovs_header
*ovs_header
= info
->userhdr
;
1151 struct sw_flow_key key
;
1152 struct sw_flow
*flow
;
1153 struct sk_buff
*reply
= NULL
;
1154 struct datapath
*dp
;
1155 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1156 struct sw_flow_match match
;
1157 struct sw_flow_id sfid
;
1158 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1160 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1163 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1164 if (!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
) {
1166 "Flow set message rejected, Key attribute missing.");
1170 error
= ovs_nla_init_match_and_action(net
, &match
, &key
, a
,
1176 /* Can allocate before locking if have acts. */
1177 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1179 if (IS_ERR(reply
)) {
1180 error
= PTR_ERR(reply
);
1181 goto err_kfree_acts
;
1186 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1187 if (unlikely(!dp
)) {
1189 goto err_unlock_ovs
;
1191 /* Check that the flow exists. */
1193 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1195 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1196 if (unlikely(!flow
)) {
1198 goto err_unlock_ovs
;
1201 /* Update actions, if present. */
1203 old_acts
= ovsl_dereference(flow
->sf_acts
);
1204 rcu_assign_pointer(flow
->sf_acts
, acts
);
1206 if (unlikely(reply
)) {
1207 error
= ovs_flow_cmd_fill_info(flow
,
1208 ovs_header
->dp_ifindex
,
1209 reply
, info
->snd_portid
,
1216 /* Could not alloc without acts before locking. */
1217 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1218 info
, OVS_FLOW_CMD_NEW
, false,
1221 if (IS_ERR(reply
)) {
1222 error
= PTR_ERR(reply
);
1223 goto err_unlock_ovs
;
1228 if (a
[OVS_FLOW_ATTR_CLEAR
])
1229 ovs_flow_stats_clear(flow
);
1233 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1235 ovs_nla_free_flow_actions_rcu(old_acts
);
1243 ovs_nla_free_flow_actions(acts
);
1248 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1250 struct nlattr
**a
= info
->attrs
;
1251 struct ovs_header
*ovs_header
= info
->userhdr
;
1252 struct net
*net
= sock_net(skb
->sk
);
1253 struct sw_flow_key key
;
1254 struct sk_buff
*reply
;
1255 struct sw_flow
*flow
;
1256 struct datapath
*dp
;
1257 struct sw_flow_match match
;
1258 struct sw_flow_id ufid
;
1259 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1261 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1264 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1265 if (a
[OVS_FLOW_ATTR_KEY
]) {
1266 ovs_match_init(&match
, &key
, true, NULL
);
1267 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1269 } else if (!ufid_present
) {
1271 "Flow get message rejected, Key attribute missing.");
1278 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1285 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1287 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1293 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1294 OVS_FLOW_CMD_NEW
, true, ufid_flags
);
1295 if (IS_ERR(reply
)) {
1296 err
= PTR_ERR(reply
);
1301 return genlmsg_reply(reply
, info
);
1307 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1309 struct nlattr
**a
= info
->attrs
;
1310 struct ovs_header
*ovs_header
= info
->userhdr
;
1311 struct net
*net
= sock_net(skb
->sk
);
1312 struct sw_flow_key key
;
1313 struct sk_buff
*reply
;
1314 struct sw_flow
*flow
= NULL
;
1315 struct datapath
*dp
;
1316 struct sw_flow_match match
;
1317 struct sw_flow_id ufid
;
1318 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1320 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1323 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1324 if (a
[OVS_FLOW_ATTR_KEY
]) {
1325 ovs_match_init(&match
, &key
, true, NULL
);
1326 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1333 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1334 if (unlikely(!dp
)) {
1339 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1340 err
= ovs_flow_tbl_flush(&dp
->table
);
1345 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1347 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1348 if (unlikely(!flow
)) {
1353 ovs_flow_tbl_remove(&dp
->table
, flow
);
1356 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1357 &flow
->id
, info
, false, ufid_flags
);
1358 if (likely(reply
)) {
1359 if (likely(!IS_ERR(reply
))) {
1360 rcu_read_lock(); /*To keep RCU checker happy. */
1361 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1362 reply
, info
->snd_portid
,
1369 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1371 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1375 ovs_flow_free(flow
, true);
1382 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1384 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1385 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1386 struct table_instance
*ti
;
1387 struct datapath
*dp
;
1391 err
= genlmsg_parse(cb
->nlh
, &dp_flow_genl_family
, a
,
1392 OVS_FLOW_ATTR_MAX
, flow_policy
, NULL
);
1395 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1398 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1404 ti
= rcu_dereference(dp
->table
.ti
);
1406 struct sw_flow
*flow
;
1409 bucket
= cb
->args
[0];
1411 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1415 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1416 NETLINK_CB(cb
->skb
).portid
,
1417 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1418 OVS_FLOW_CMD_NEW
, ufid_flags
) < 0)
1421 cb
->args
[0] = bucket
;
1428 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1429 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1430 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1431 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1432 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1433 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1434 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1435 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1438 static const struct genl_ops dp_flow_genl_ops
[] = {
1439 { .cmd
= OVS_FLOW_CMD_NEW
,
1440 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1441 .policy
= flow_policy
,
1442 .doit
= ovs_flow_cmd_new
1444 { .cmd
= OVS_FLOW_CMD_DEL
,
1445 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1446 .policy
= flow_policy
,
1447 .doit
= ovs_flow_cmd_del
1449 { .cmd
= OVS_FLOW_CMD_GET
,
1450 .flags
= 0, /* OK for unprivileged users. */
1451 .policy
= flow_policy
,
1452 .doit
= ovs_flow_cmd_get
,
1453 .dumpit
= ovs_flow_cmd_dump
1455 { .cmd
= OVS_FLOW_CMD_SET
,
1456 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1457 .policy
= flow_policy
,
1458 .doit
= ovs_flow_cmd_set
,
1462 static struct genl_family dp_flow_genl_family __ro_after_init
= {
1463 .hdrsize
= sizeof(struct ovs_header
),
1464 .name
= OVS_FLOW_FAMILY
,
1465 .version
= OVS_FLOW_VERSION
,
1466 .maxattr
= OVS_FLOW_ATTR_MAX
,
1468 .parallel_ops
= true,
1469 .ops
= dp_flow_genl_ops
,
1470 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1471 .mcgrps
= &ovs_dp_flow_multicast_group
,
1473 .module
= THIS_MODULE
,
1476 static size_t ovs_dp_cmd_msg_size(void)
1478 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1480 msgsize
+= nla_total_size(IFNAMSIZ
);
1481 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1482 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1483 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1488 /* Called with ovs_mutex. */
1489 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1490 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1492 struct ovs_header
*ovs_header
;
1493 struct ovs_dp_stats dp_stats
;
1494 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1497 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1502 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1504 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1506 goto nla_put_failure
;
1508 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1509 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1510 &dp_stats
, OVS_DP_ATTR_PAD
))
1511 goto nla_put_failure
;
1513 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1514 sizeof(struct ovs_dp_megaflow_stats
),
1515 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1516 goto nla_put_failure
;
1518 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1519 goto nla_put_failure
;
1521 genlmsg_end(skb
, ovs_header
);
1525 genlmsg_cancel(skb
, ovs_header
);
1530 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1532 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1535 /* Called with rcu_read_lock or ovs_mutex. */
1536 static struct datapath
*lookup_datapath(struct net
*net
,
1537 const struct ovs_header
*ovs_header
,
1538 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1540 struct datapath
*dp
;
1542 if (!a
[OVS_DP_ATTR_NAME
])
1543 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1545 struct vport
*vport
;
1547 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1548 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1550 return dp
? dp
: ERR_PTR(-ENODEV
);
1553 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1555 struct datapath
*dp
;
1557 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1561 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1562 dp
->user_features
= 0;
1565 static void ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1567 if (a
[OVS_DP_ATTR_USER_FEATURES
])
1568 dp
->user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1571 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1573 struct nlattr
**a
= info
->attrs
;
1574 struct vport_parms parms
;
1575 struct sk_buff
*reply
;
1576 struct datapath
*dp
;
1577 struct vport
*vport
;
1578 struct ovs_net
*ovs_net
;
1582 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1585 reply
= ovs_dp_cmd_alloc_info();
1590 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1592 goto err_free_reply
;
1594 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1596 /* Allocate table. */
1597 err
= ovs_flow_tbl_init(&dp
->table
);
1601 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1602 if (!dp
->stats_percpu
) {
1604 goto err_destroy_table
;
1607 dp
->ports
= kmalloc(DP_VPORT_HASH_BUCKETS
* sizeof(struct hlist_head
),
1611 goto err_destroy_percpu
;
1614 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1615 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1617 /* Set up our datapath device. */
1618 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1619 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1620 parms
.options
= NULL
;
1622 parms
.port_no
= OVSP_LOCAL
;
1623 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1625 ovs_dp_change(dp
, a
);
1627 /* So far only local changes have been made, now need the lock. */
1630 vport
= new_vport(&parms
);
1631 if (IS_ERR(vport
)) {
1632 err
= PTR_ERR(vport
);
1636 if (err
== -EEXIST
) {
1637 /* An outdated user space instance that does not understand
1638 * the concept of user_features has attempted to create a new
1639 * datapath and is likely to reuse it. Drop all user features.
1641 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1642 ovs_dp_reset_user_features(skb
, info
);
1645 goto err_destroy_ports_array
;
1648 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1649 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1652 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1653 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1657 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1660 err_destroy_ports_array
:
1664 free_percpu(dp
->stats_percpu
);
1666 ovs_flow_tbl_destroy(&dp
->table
);
1675 /* Called with ovs_mutex. */
1676 static void __dp_destroy(struct datapath
*dp
)
1680 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1681 struct vport
*vport
;
1682 struct hlist_node
*n
;
1684 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1685 if (vport
->port_no
!= OVSP_LOCAL
)
1686 ovs_dp_detach_port(vport
);
1689 list_del_rcu(&dp
->list_node
);
1691 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1692 * all ports in datapath are destroyed first before freeing datapath.
1694 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1696 /* RCU destroy the flow table */
1697 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1700 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1702 struct sk_buff
*reply
;
1703 struct datapath
*dp
;
1706 reply
= ovs_dp_cmd_alloc_info();
1711 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1714 goto err_unlock_free
;
1716 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1717 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1723 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1733 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1735 struct sk_buff
*reply
;
1736 struct datapath
*dp
;
1739 reply
= ovs_dp_cmd_alloc_info();
1744 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1747 goto err_unlock_free
;
1749 ovs_dp_change(dp
, info
->attrs
);
1751 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1752 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1756 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1766 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1768 struct sk_buff
*reply
;
1769 struct datapath
*dp
;
1772 reply
= ovs_dp_cmd_alloc_info();
1777 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1780 goto err_unlock_free
;
1782 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1783 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1787 return genlmsg_reply(reply
, info
);
1795 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1797 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1798 struct datapath
*dp
;
1799 int skip
= cb
->args
[0];
1803 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1805 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1806 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1807 OVS_DP_CMD_NEW
) < 0)
1818 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1819 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1820 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1821 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1824 static const struct genl_ops dp_datapath_genl_ops
[] = {
1825 { .cmd
= OVS_DP_CMD_NEW
,
1826 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1827 .policy
= datapath_policy
,
1828 .doit
= ovs_dp_cmd_new
1830 { .cmd
= OVS_DP_CMD_DEL
,
1831 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1832 .policy
= datapath_policy
,
1833 .doit
= ovs_dp_cmd_del
1835 { .cmd
= OVS_DP_CMD_GET
,
1836 .flags
= 0, /* OK for unprivileged users. */
1837 .policy
= datapath_policy
,
1838 .doit
= ovs_dp_cmd_get
,
1839 .dumpit
= ovs_dp_cmd_dump
1841 { .cmd
= OVS_DP_CMD_SET
,
1842 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1843 .policy
= datapath_policy
,
1844 .doit
= ovs_dp_cmd_set
,
1848 static struct genl_family dp_datapath_genl_family __ro_after_init
= {
1849 .hdrsize
= sizeof(struct ovs_header
),
1850 .name
= OVS_DATAPATH_FAMILY
,
1851 .version
= OVS_DATAPATH_VERSION
,
1852 .maxattr
= OVS_DP_ATTR_MAX
,
1854 .parallel_ops
= true,
1855 .ops
= dp_datapath_genl_ops
,
1856 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1857 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1859 .module
= THIS_MODULE
,
1862 /* Called with ovs_mutex or RCU read lock. */
1863 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1864 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1866 struct ovs_header
*ovs_header
;
1867 struct ovs_vport_stats vport_stats
;
1870 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1875 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1877 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1878 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1879 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1880 ovs_vport_name(vport
)))
1881 goto nla_put_failure
;
1883 ovs_vport_get_stats(vport
, &vport_stats
);
1884 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1885 sizeof(struct ovs_vport_stats
), &vport_stats
,
1886 OVS_VPORT_ATTR_PAD
))
1887 goto nla_put_failure
;
1889 if (ovs_vport_get_upcall_portids(vport
, skb
))
1890 goto nla_put_failure
;
1892 err
= ovs_vport_get_options(vport
, skb
);
1893 if (err
== -EMSGSIZE
)
1896 genlmsg_end(skb
, ovs_header
);
1902 genlmsg_cancel(skb
, ovs_header
);
1906 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1908 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1911 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1912 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, u32 portid
,
1915 struct sk_buff
*skb
;
1918 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1920 return ERR_PTR(-ENOMEM
);
1922 retval
= ovs_vport_cmd_fill_info(vport
, skb
, portid
, seq
, 0, cmd
);
1928 /* Called with ovs_mutex or RCU read lock. */
1929 static struct vport
*lookup_vport(struct net
*net
,
1930 const struct ovs_header
*ovs_header
,
1931 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1933 struct datapath
*dp
;
1934 struct vport
*vport
;
1936 if (a
[OVS_VPORT_ATTR_NAME
]) {
1937 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
1939 return ERR_PTR(-ENODEV
);
1940 if (ovs_header
->dp_ifindex
&&
1941 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
1942 return ERR_PTR(-ENODEV
);
1944 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
1945 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1947 if (port_no
>= DP_MAX_PORTS
)
1948 return ERR_PTR(-EFBIG
);
1950 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1952 return ERR_PTR(-ENODEV
);
1954 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
1956 return ERR_PTR(-ENODEV
);
1959 return ERR_PTR(-EINVAL
);
1962 /* Called with ovs_mutex */
1963 static void update_headroom(struct datapath
*dp
)
1965 unsigned dev_headroom
, max_headroom
= 0;
1966 struct net_device
*dev
;
1967 struct vport
*vport
;
1970 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1971 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
1973 dev_headroom
= netdev_get_fwd_headroom(dev
);
1974 if (dev_headroom
> max_headroom
)
1975 max_headroom
= dev_headroom
;
1979 dp
->max_headroom
= max_headroom
;
1980 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1981 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
1982 netdev_set_rx_headroom(vport
->dev
, max_headroom
);
1985 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1987 struct nlattr
**a
= info
->attrs
;
1988 struct ovs_header
*ovs_header
= info
->userhdr
;
1989 struct vport_parms parms
;
1990 struct sk_buff
*reply
;
1991 struct vport
*vport
;
1992 struct datapath
*dp
;
1996 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
1997 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
2000 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
2001 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
2002 if (port_no
>= DP_MAX_PORTS
)
2005 reply
= ovs_vport_cmd_alloc_info();
2011 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2014 goto exit_unlock_free
;
2017 vport
= ovs_vport_ovsl(dp
, port_no
);
2020 goto exit_unlock_free
;
2022 for (port_no
= 1; ; port_no
++) {
2023 if (port_no
>= DP_MAX_PORTS
) {
2025 goto exit_unlock_free
;
2027 vport
= ovs_vport_ovsl(dp
, port_no
);
2033 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
2034 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
2035 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2037 parms
.port_no
= port_no
;
2038 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2040 vport
= new_vport(&parms
);
2041 err
= PTR_ERR(vport
);
2042 if (IS_ERR(vport
)) {
2045 goto exit_unlock_free
;
2048 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2049 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2051 if (netdev_get_fwd_headroom(vport
->dev
) > dp
->max_headroom
)
2052 update_headroom(dp
);
2054 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2059 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2068 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2070 struct nlattr
**a
= info
->attrs
;
2071 struct sk_buff
*reply
;
2072 struct vport
*vport
;
2075 reply
= ovs_vport_cmd_alloc_info();
2080 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2081 err
= PTR_ERR(vport
);
2083 goto exit_unlock_free
;
2085 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2086 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2088 goto exit_unlock_free
;
2091 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2092 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2094 goto exit_unlock_free
;
2098 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2099 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2101 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2103 goto exit_unlock_free
;
2106 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2107 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2111 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2120 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2122 bool must_update_headroom
= false;
2123 struct nlattr
**a
= info
->attrs
;
2124 struct sk_buff
*reply
;
2125 struct datapath
*dp
;
2126 struct vport
*vport
;
2129 reply
= ovs_vport_cmd_alloc_info();
2134 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2135 err
= PTR_ERR(vport
);
2137 goto exit_unlock_free
;
2139 if (vport
->port_no
== OVSP_LOCAL
) {
2141 goto exit_unlock_free
;
2144 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2145 info
->snd_seq
, 0, OVS_VPORT_CMD_DEL
);
2148 /* the vport deletion may trigger dp headroom update */
2150 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2151 must_update_headroom
= true;
2152 netdev_reset_rx_headroom(vport
->dev
);
2153 ovs_dp_detach_port(vport
);
2155 if (must_update_headroom
)
2156 update_headroom(dp
);
2159 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2168 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2170 struct nlattr
**a
= info
->attrs
;
2171 struct ovs_header
*ovs_header
= info
->userhdr
;
2172 struct sk_buff
*reply
;
2173 struct vport
*vport
;
2176 reply
= ovs_vport_cmd_alloc_info();
2181 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2182 err
= PTR_ERR(vport
);
2184 goto exit_unlock_free
;
2185 err
= ovs_vport_cmd_fill_info(vport
, reply
, info
->snd_portid
,
2186 info
->snd_seq
, 0, OVS_VPORT_CMD_NEW
);
2190 return genlmsg_reply(reply
, info
);
2198 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2200 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2201 struct datapath
*dp
;
2202 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2206 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2211 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2212 struct vport
*vport
;
2215 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2217 ovs_vport_cmd_fill_info(vport
, skb
,
2218 NETLINK_CB(cb
->skb
).portid
,
2221 OVS_VPORT_CMD_NEW
) < 0)
2237 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2238 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2239 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2240 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2241 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2242 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
2243 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2246 static const struct genl_ops dp_vport_genl_ops
[] = {
2247 { .cmd
= OVS_VPORT_CMD_NEW
,
2248 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2249 .policy
= vport_policy
,
2250 .doit
= ovs_vport_cmd_new
2252 { .cmd
= OVS_VPORT_CMD_DEL
,
2253 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2254 .policy
= vport_policy
,
2255 .doit
= ovs_vport_cmd_del
2257 { .cmd
= OVS_VPORT_CMD_GET
,
2258 .flags
= 0, /* OK for unprivileged users. */
2259 .policy
= vport_policy
,
2260 .doit
= ovs_vport_cmd_get
,
2261 .dumpit
= ovs_vport_cmd_dump
2263 { .cmd
= OVS_VPORT_CMD_SET
,
2264 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2265 .policy
= vport_policy
,
2266 .doit
= ovs_vport_cmd_set
,
2270 struct genl_family dp_vport_genl_family __ro_after_init
= {
2271 .hdrsize
= sizeof(struct ovs_header
),
2272 .name
= OVS_VPORT_FAMILY
,
2273 .version
= OVS_VPORT_VERSION
,
2274 .maxattr
= OVS_VPORT_ATTR_MAX
,
2276 .parallel_ops
= true,
2277 .ops
= dp_vport_genl_ops
,
2278 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2279 .mcgrps
= &ovs_dp_vport_multicast_group
,
2281 .module
= THIS_MODULE
,
2284 static struct genl_family
* const dp_genl_families
[] = {
2285 &dp_datapath_genl_family
,
2286 &dp_vport_genl_family
,
2287 &dp_flow_genl_family
,
2288 &dp_packet_genl_family
,
2291 static void dp_unregister_genl(int n_families
)
2295 for (i
= 0; i
< n_families
; i
++)
2296 genl_unregister_family(dp_genl_families
[i
]);
2299 static int __init
dp_register_genl(void)
2304 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2306 err
= genl_register_family(dp_genl_families
[i
]);
2314 dp_unregister_genl(i
);
2318 static int __net_init
ovs_init_net(struct net
*net
)
2320 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2322 INIT_LIST_HEAD(&ovs_net
->dps
);
2323 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2328 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2329 struct list_head
*head
)
2331 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2332 struct datapath
*dp
;
2334 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2337 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2338 struct vport
*vport
;
2340 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2341 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2344 if (dev_net(vport
->dev
) == dnet
)
2345 list_add(&vport
->detach_list
, head
);
2351 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2353 struct datapath
*dp
, *dp_next
;
2354 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2355 struct vport
*vport
, *vport_next
;
2361 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2366 list_vports_from_net(net
, dnet
, &head
);
2369 /* Detach all vports from given namespace. */
2370 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2371 list_del(&vport
->detach_list
);
2372 ovs_dp_detach_port(vport
);
2377 cancel_work_sync(&ovs_net
->dp_notify_work
);
2380 static struct pernet_operations ovs_net_ops
= {
2381 .init
= ovs_init_net
,
2382 .exit
= ovs_exit_net
,
2384 .size
= sizeof(struct ovs_net
),
2387 static int __init
dp_init(void)
2391 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2393 pr_info("Open vSwitch switching datapath\n");
2395 err
= action_fifos_init();
2399 err
= ovs_internal_dev_rtnl_link_register();
2401 goto error_action_fifos_exit
;
2403 err
= ovs_flow_init();
2405 goto error_unreg_rtnl_link
;
2407 err
= ovs_vport_init();
2409 goto error_flow_exit
;
2411 err
= register_pernet_device(&ovs_net_ops
);
2413 goto error_vport_exit
;
2415 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2417 goto error_netns_exit
;
2419 err
= ovs_netdev_init();
2421 goto error_unreg_notifier
;
2423 err
= dp_register_genl();
2425 goto error_unreg_netdev
;
2431 error_unreg_notifier
:
2432 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2434 unregister_pernet_device(&ovs_net_ops
);
2439 error_unreg_rtnl_link
:
2440 ovs_internal_dev_rtnl_link_unregister();
2441 error_action_fifos_exit
:
2442 action_fifos_exit();
2447 static void dp_cleanup(void)
2449 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2451 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2452 unregister_pernet_device(&ovs_net_ops
);
2456 ovs_internal_dev_rtnl_link_unregister();
2457 action_fifos_exit();
2460 module_init(dp_init
);
2461 module_exit(dp_cleanup
);
2463 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2464 MODULE_LICENSE("GPL");
2465 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY
);
2466 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY
);
2467 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY
);
2468 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY
);