1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2007-2014 Nicira, Inc.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/if_arp.h>
11 #include <linux/if_vlan.h>
14 #include <linux/jhash.h>
15 #include <linux/delay.h>
16 #include <linux/time.h>
17 #include <linux/etherdevice.h>
18 #include <linux/genetlink.h>
19 #include <linux/kernel.h>
20 #include <linux/kthread.h>
21 #include <linux/mutex.h>
22 #include <linux/percpu.h>
23 #include <linux/rcupdate.h>
24 #include <linux/tcp.h>
25 #include <linux/udp.h>
26 #include <linux/ethtool.h>
27 #include <linux/wait.h>
28 #include <asm/div64.h>
29 #include <linux/highmem.h>
30 #include <linux/netfilter_bridge.h>
31 #include <linux/netfilter_ipv4.h>
32 #include <linux/inetdevice.h>
33 #include <linux/list.h>
34 #include <linux/openvswitch.h>
35 #include <linux/rculist.h>
36 #include <linux/dmi.h>
37 #include <net/genetlink.h>
38 #include <net/net_namespace.h>
39 #include <net/netns/generic.h>
43 #include "flow_table.h"
44 #include "flow_netlink.h"
46 #include "vport-internal_dev.h"
47 #include "vport-netdev.h"
49 unsigned int ovs_net_id __read_mostly
;
51 static struct genl_family dp_packet_genl_family
;
52 static struct genl_family dp_flow_genl_family
;
53 static struct genl_family dp_datapath_genl_family
;
55 static const struct nla_policy flow_policy
[];
57 static const struct genl_multicast_group ovs_dp_flow_multicast_group
= {
58 .name
= OVS_FLOW_MCGROUP
,
61 static const struct genl_multicast_group ovs_dp_datapath_multicast_group
= {
62 .name
= OVS_DATAPATH_MCGROUP
,
65 static const struct genl_multicast_group ovs_dp_vport_multicast_group
= {
66 .name
= OVS_VPORT_MCGROUP
,
69 /* Check if need to build a reply message.
70 * OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
71 static bool ovs_must_notify(struct genl_family
*family
, struct genl_info
*info
,
74 return info
->nlhdr
->nlmsg_flags
& NLM_F_ECHO
||
75 genl_has_listeners(family
, genl_info_net(info
), group
);
78 static void ovs_notify(struct genl_family
*family
,
79 struct sk_buff
*skb
, struct genl_info
*info
)
81 genl_notify(family
, skb
, info
, 0, GFP_KERNEL
);
87 * All writes e.g. Writes to device state (add/remove datapath, port, set
88 * operations on vports, etc.), Writes to other state (flow table
89 * modifications, set miscellaneous datapath parameters, etc.) are protected
92 * Reads are protected by RCU.
94 * There are a few special cases (mostly stats) that have their own
95 * synchronization but they nest under all of above and don't interact with
98 * The RTNL lock nests inside ovs_mutex.
101 static DEFINE_MUTEX(ovs_mutex
);
105 mutex_lock(&ovs_mutex
);
108 void ovs_unlock(void)
110 mutex_unlock(&ovs_mutex
);
113 #ifdef CONFIG_LOCKDEP
114 int lockdep_ovsl_is_held(void)
117 return lockdep_is_held(&ovs_mutex
);
123 static struct vport
*new_vport(const struct vport_parms
*);
124 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*,
125 const struct sw_flow_key
*,
126 const struct dp_upcall_info
*,
128 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*,
129 const struct sw_flow_key
*,
130 const struct dp_upcall_info
*,
133 /* Must be called with rcu_read_lock or ovs_mutex. */
134 const char *ovs_dp_name(const struct datapath
*dp
)
136 struct vport
*vport
= ovs_vport_ovsl_rcu(dp
, OVSP_LOCAL
);
137 return ovs_vport_name(vport
);
140 static int get_dpifindex(const struct datapath
*dp
)
147 local
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
149 ifindex
= local
->dev
->ifindex
;
158 static void destroy_dp_rcu(struct rcu_head
*rcu
)
160 struct datapath
*dp
= container_of(rcu
, struct datapath
, rcu
);
162 ovs_flow_tbl_destroy(&dp
->table
);
163 free_percpu(dp
->stats_percpu
);
169 static struct hlist_head
*vport_hash_bucket(const struct datapath
*dp
,
172 return &dp
->ports
[port_no
& (DP_VPORT_HASH_BUCKETS
- 1)];
175 /* Called with ovs_mutex or RCU read lock. */
176 struct vport
*ovs_lookup_vport(const struct datapath
*dp
, u16 port_no
)
179 struct hlist_head
*head
;
181 head
= vport_hash_bucket(dp
, port_no
);
182 hlist_for_each_entry_rcu(vport
, head
, dp_hash_node
) {
183 if (vport
->port_no
== port_no
)
189 /* Called with ovs_mutex. */
190 static struct vport
*new_vport(const struct vport_parms
*parms
)
194 vport
= ovs_vport_add(parms
);
195 if (!IS_ERR(vport
)) {
196 struct datapath
*dp
= parms
->dp
;
197 struct hlist_head
*head
= vport_hash_bucket(dp
, vport
->port_no
);
199 hlist_add_head_rcu(&vport
->dp_hash_node
, head
);
204 void ovs_dp_detach_port(struct vport
*p
)
208 /* First drop references to device. */
209 hlist_del_rcu(&p
->dp_hash_node
);
211 /* Then destroy it. */
215 /* Must be called with rcu_read_lock. */
216 void ovs_dp_process_packet(struct sk_buff
*skb
, struct sw_flow_key
*key
)
218 const struct vport
*p
= OVS_CB(skb
)->input_vport
;
219 struct datapath
*dp
= p
->dp
;
220 struct sw_flow
*flow
;
221 struct sw_flow_actions
*sf_acts
;
222 struct dp_stats_percpu
*stats
;
227 stats
= this_cpu_ptr(dp
->stats_percpu
);
230 flow
= ovs_flow_tbl_lookup_stats(&dp
->table
, key
, skb_get_hash(skb
),
232 if (unlikely(!flow
)) {
233 struct dp_upcall_info upcall
;
235 memset(&upcall
, 0, sizeof(upcall
));
236 upcall
.cmd
= OVS_PACKET_CMD_MISS
;
237 upcall
.portid
= ovs_vport_find_upcall_portid(p
, skb
);
238 upcall
.mru
= OVS_CB(skb
)->mru
;
239 error
= ovs_dp_upcall(dp
, skb
, key
, &upcall
, 0);
244 stats_counter
= &stats
->n_missed
;
248 ovs_flow_stats_update(flow
, key
->tp
.flags
, skb
);
249 sf_acts
= rcu_dereference(flow
->sf_acts
);
250 error
= ovs_execute_actions(dp
, skb
, sf_acts
, key
);
252 net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n",
253 ovs_dp_name(dp
), error
);
255 stats_counter
= &stats
->n_hit
;
258 /* Update datapath statistics. */
259 u64_stats_update_begin(&stats
->syncp
);
261 stats
->n_mask_hit
+= n_mask_hit
;
262 u64_stats_update_end(&stats
->syncp
);
265 int ovs_dp_upcall(struct datapath
*dp
, struct sk_buff
*skb
,
266 const struct sw_flow_key
*key
,
267 const struct dp_upcall_info
*upcall_info
,
270 struct dp_stats_percpu
*stats
;
273 if (upcall_info
->portid
== 0) {
278 if (!skb_is_gso(skb
))
279 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
281 err
= queue_gso_packets(dp
, skb
, key
, upcall_info
, cutlen
);
288 stats
= this_cpu_ptr(dp
->stats_percpu
);
290 u64_stats_update_begin(&stats
->syncp
);
292 u64_stats_update_end(&stats
->syncp
);
297 static int queue_gso_packets(struct datapath
*dp
, struct sk_buff
*skb
,
298 const struct sw_flow_key
*key
,
299 const struct dp_upcall_info
*upcall_info
,
302 unsigned int gso_type
= skb_shinfo(skb
)->gso_type
;
303 struct sw_flow_key later_key
;
304 struct sk_buff
*segs
, *nskb
;
307 BUILD_BUG_ON(sizeof(*OVS_CB(skb
)) > SKB_SGO_CB_OFFSET
);
308 segs
= __skb_gso_segment(skb
, NETIF_F_SG
, false);
310 return PTR_ERR(segs
);
314 if (gso_type
& SKB_GSO_UDP
) {
315 /* The initial flow key extracted by ovs_flow_key_extract()
316 * in this case is for a first fragment, so we need to
317 * properly mark later fragments.
320 later_key
.ip
.frag
= OVS_FRAG_TYPE_LATER
;
323 /* Queue all of the segments. */
326 if (gso_type
& SKB_GSO_UDP
&& skb
!= segs
)
329 err
= queue_userspace_packet(dp
, skb
, key
, upcall_info
, cutlen
);
333 } while ((skb
= skb
->next
));
335 /* Free all of the segments. */
343 } while ((skb
= nskb
));
347 static size_t upcall_msg_size(const struct dp_upcall_info
*upcall_info
,
348 unsigned int hdrlen
, int actions_attrlen
)
350 size_t size
= NLMSG_ALIGN(sizeof(struct ovs_header
))
351 + nla_total_size(hdrlen
) /* OVS_PACKET_ATTR_PACKET */
352 + nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
353 + nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */
354 + nla_total_size(sizeof(u64
)); /* OVS_PACKET_ATTR_HASH */
356 /* OVS_PACKET_ATTR_USERDATA */
357 if (upcall_info
->userdata
)
358 size
+= NLA_ALIGN(upcall_info
->userdata
->nla_len
);
360 /* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
361 if (upcall_info
->egress_tun_info
)
362 size
+= nla_total_size(ovs_tun_key_attr_size());
364 /* OVS_PACKET_ATTR_ACTIONS */
365 if (upcall_info
->actions_len
)
366 size
+= nla_total_size(actions_attrlen
);
368 /* OVS_PACKET_ATTR_MRU */
369 if (upcall_info
->mru
)
370 size
+= nla_total_size(sizeof(upcall_info
->mru
));
375 static void pad_packet(struct datapath
*dp
, struct sk_buff
*skb
)
377 if (!(dp
->user_features
& OVS_DP_F_UNALIGNED
)) {
378 size_t plen
= NLA_ALIGN(skb
->len
) - skb
->len
;
381 skb_put_zero(skb
, plen
);
385 static int queue_userspace_packet(struct datapath
*dp
, struct sk_buff
*skb
,
386 const struct sw_flow_key
*key
,
387 const struct dp_upcall_info
*upcall_info
,
390 struct ovs_header
*upcall
;
391 struct sk_buff
*nskb
= NULL
;
392 struct sk_buff
*user_skb
= NULL
; /* to be queued to userspace */
399 dp_ifindex
= get_dpifindex(dp
);
403 if (skb_vlan_tag_present(skb
)) {
404 nskb
= skb_clone(skb
, GFP_ATOMIC
);
408 nskb
= __vlan_hwaccel_push_inside(nskb
);
415 if (nla_attr_size(skb
->len
) > USHRT_MAX
) {
420 /* Complete checksum if needed */
421 if (skb
->ip_summed
== CHECKSUM_PARTIAL
&&
422 (err
= skb_csum_hwoffload_help(skb
, 0)))
425 /* Older versions of OVS user space enforce alignment of the last
426 * Netlink attribute to NLA_ALIGNTO which would require extensive
427 * padding logic. Only perform zerocopy if padding is not required.
429 if (dp
->user_features
& OVS_DP_F_UNALIGNED
)
430 hlen
= skb_zerocopy_headlen(skb
);
434 len
= upcall_msg_size(upcall_info
, hlen
- cutlen
,
435 OVS_CB(skb
)->acts_origlen
);
436 user_skb
= genlmsg_new(len
, GFP_ATOMIC
);
442 upcall
= genlmsg_put(user_skb
, 0, 0, &dp_packet_genl_family
,
443 0, upcall_info
->cmd
);
448 upcall
->dp_ifindex
= dp_ifindex
;
450 err
= ovs_nla_put_key(key
, key
, OVS_PACKET_ATTR_KEY
, false, user_skb
);
454 if (upcall_info
->userdata
)
455 __nla_put(user_skb
, OVS_PACKET_ATTR_USERDATA
,
456 nla_len(upcall_info
->userdata
),
457 nla_data(upcall_info
->userdata
));
459 if (upcall_info
->egress_tun_info
) {
460 nla
= nla_nest_start_noflag(user_skb
,
461 OVS_PACKET_ATTR_EGRESS_TUN_KEY
);
466 err
= ovs_nla_put_tunnel_info(user_skb
,
467 upcall_info
->egress_tun_info
);
471 nla_nest_end(user_skb
, nla
);
474 if (upcall_info
->actions_len
) {
475 nla
= nla_nest_start_noflag(user_skb
, OVS_PACKET_ATTR_ACTIONS
);
480 err
= ovs_nla_put_actions(upcall_info
->actions
,
481 upcall_info
->actions_len
,
484 nla_nest_end(user_skb
, nla
);
486 nla_nest_cancel(user_skb
, nla
);
489 /* Add OVS_PACKET_ATTR_MRU */
490 if (upcall_info
->mru
&&
491 nla_put_u16(user_skb
, OVS_PACKET_ATTR_MRU
, upcall_info
->mru
)) {
496 /* Add OVS_PACKET_ATTR_LEN when packet is truncated */
498 nla_put_u32(user_skb
, OVS_PACKET_ATTR_LEN
, skb
->len
)) {
503 /* Add OVS_PACKET_ATTR_HASH */
504 hash
= skb_get_hash_raw(skb
);
506 hash
|= OVS_PACKET_HASH_SW_BIT
;
509 hash
|= OVS_PACKET_HASH_L4_BIT
;
511 if (nla_put(user_skb
, OVS_PACKET_ATTR_HASH
, sizeof (u64
), &hash
)) {
516 /* Only reserve room for attribute header, packet data is added
517 * in skb_zerocopy() */
518 if (!(nla
= nla_reserve(user_skb
, OVS_PACKET_ATTR_PACKET
, 0))) {
522 nla
->nla_len
= nla_attr_size(skb
->len
- cutlen
);
524 err
= skb_zerocopy(user_skb
, skb
, skb
->len
- cutlen
, hlen
);
528 /* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
529 pad_packet(dp
, user_skb
);
531 ((struct nlmsghdr
*) user_skb
->data
)->nlmsg_len
= user_skb
->len
;
533 err
= genlmsg_unicast(ovs_dp_get_net(dp
), user_skb
, upcall_info
->portid
);
543 static int ovs_packet_cmd_execute(struct sk_buff
*skb
, struct genl_info
*info
)
545 struct ovs_header
*ovs_header
= info
->userhdr
;
546 struct net
*net
= sock_net(skb
->sk
);
547 struct nlattr
**a
= info
->attrs
;
548 struct sw_flow_actions
*acts
;
549 struct sk_buff
*packet
;
550 struct sw_flow
*flow
;
551 struct sw_flow_actions
*sf_acts
;
553 struct vport
*input_vport
;
558 bool log
= !a
[OVS_PACKET_ATTR_PROBE
];
561 if (!a
[OVS_PACKET_ATTR_PACKET
] || !a
[OVS_PACKET_ATTR_KEY
] ||
562 !a
[OVS_PACKET_ATTR_ACTIONS
])
565 len
= nla_len(a
[OVS_PACKET_ATTR_PACKET
]);
566 packet
= __dev_alloc_skb(NET_IP_ALIGN
+ len
, GFP_KERNEL
);
570 skb_reserve(packet
, NET_IP_ALIGN
);
572 nla_memcpy(__skb_put(packet
, len
), a
[OVS_PACKET_ATTR_PACKET
], len
);
574 /* Set packet's mru */
575 if (a
[OVS_PACKET_ATTR_MRU
]) {
576 mru
= nla_get_u16(a
[OVS_PACKET_ATTR_MRU
]);
577 packet
->ignore_df
= 1;
579 OVS_CB(packet
)->mru
= mru
;
581 if (a
[OVS_PACKET_ATTR_HASH
]) {
582 hash
= nla_get_u64(a
[OVS_PACKET_ATTR_HASH
]);
584 __skb_set_hash(packet
, hash
& 0xFFFFFFFFULL
,
585 !!(hash
& OVS_PACKET_HASH_SW_BIT
),
586 !!(hash
& OVS_PACKET_HASH_L4_BIT
));
589 /* Build an sw_flow for sending this packet. */
590 flow
= ovs_flow_alloc();
595 err
= ovs_flow_key_extract_userspace(net
, a
[OVS_PACKET_ATTR_KEY
],
596 packet
, &flow
->key
, log
);
600 err
= ovs_nla_copy_actions(net
, a
[OVS_PACKET_ATTR_ACTIONS
],
601 &flow
->key
, &acts
, log
);
605 rcu_assign_pointer(flow
->sf_acts
, acts
);
606 packet
->priority
= flow
->key
.phy
.priority
;
607 packet
->mark
= flow
->key
.phy
.skb_mark
;
610 dp
= get_dp_rcu(net
, ovs_header
->dp_ifindex
);
615 input_vport
= ovs_vport_rcu(dp
, flow
->key
.phy
.in_port
);
617 input_vport
= ovs_vport_rcu(dp
, OVSP_LOCAL
);
622 packet
->dev
= input_vport
->dev
;
623 OVS_CB(packet
)->input_vport
= input_vport
;
624 sf_acts
= rcu_dereference(flow
->sf_acts
);
627 err
= ovs_execute_actions(dp
, packet
, sf_acts
, &flow
->key
);
631 ovs_flow_free(flow
, false);
637 ovs_flow_free(flow
, false);
644 static const struct nla_policy packet_policy
[OVS_PACKET_ATTR_MAX
+ 1] = {
645 [OVS_PACKET_ATTR_PACKET
] = { .len
= ETH_HLEN
},
646 [OVS_PACKET_ATTR_KEY
] = { .type
= NLA_NESTED
},
647 [OVS_PACKET_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
648 [OVS_PACKET_ATTR_PROBE
] = { .type
= NLA_FLAG
},
649 [OVS_PACKET_ATTR_MRU
] = { .type
= NLA_U16
},
652 static const struct genl_ops dp_packet_genl_ops
[] = {
653 { .cmd
= OVS_PACKET_CMD_EXECUTE
,
654 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
655 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
656 .doit
= ovs_packet_cmd_execute
660 static struct genl_family dp_packet_genl_family __ro_after_init
= {
661 .hdrsize
= sizeof(struct ovs_header
),
662 .name
= OVS_PACKET_FAMILY
,
663 .version
= OVS_PACKET_VERSION
,
664 .maxattr
= OVS_PACKET_ATTR_MAX
,
665 .policy
= packet_policy
,
667 .parallel_ops
= true,
668 .ops
= dp_packet_genl_ops
,
669 .n_ops
= ARRAY_SIZE(dp_packet_genl_ops
),
670 .module
= THIS_MODULE
,
673 static void get_dp_stats(const struct datapath
*dp
, struct ovs_dp_stats
*stats
,
674 struct ovs_dp_megaflow_stats
*mega_stats
)
678 memset(mega_stats
, 0, sizeof(*mega_stats
));
680 stats
->n_flows
= ovs_flow_tbl_count(&dp
->table
);
681 mega_stats
->n_masks
= ovs_flow_tbl_num_masks(&dp
->table
);
683 stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
685 for_each_possible_cpu(i
) {
686 const struct dp_stats_percpu
*percpu_stats
;
687 struct dp_stats_percpu local_stats
;
690 percpu_stats
= per_cpu_ptr(dp
->stats_percpu
, i
);
693 start
= u64_stats_fetch_begin_irq(&percpu_stats
->syncp
);
694 local_stats
= *percpu_stats
;
695 } while (u64_stats_fetch_retry_irq(&percpu_stats
->syncp
, start
));
697 stats
->n_hit
+= local_stats
.n_hit
;
698 stats
->n_missed
+= local_stats
.n_missed
;
699 stats
->n_lost
+= local_stats
.n_lost
;
700 mega_stats
->n_mask_hit
+= local_stats
.n_mask_hit
;
704 static bool should_fill_key(const struct sw_flow_id
*sfid
, uint32_t ufid_flags
)
706 return ovs_identifier_is_ufid(sfid
) &&
707 !(ufid_flags
& OVS_UFID_F_OMIT_KEY
);
710 static bool should_fill_mask(uint32_t ufid_flags
)
712 return !(ufid_flags
& OVS_UFID_F_OMIT_MASK
);
715 static bool should_fill_actions(uint32_t ufid_flags
)
717 return !(ufid_flags
& OVS_UFID_F_OMIT_ACTIONS
);
720 static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions
*acts
,
721 const struct sw_flow_id
*sfid
,
724 size_t len
= NLMSG_ALIGN(sizeof(struct ovs_header
));
726 /* OVS_FLOW_ATTR_UFID */
727 if (sfid
&& ovs_identifier_is_ufid(sfid
))
728 len
+= nla_total_size(sfid
->ufid_len
);
730 /* OVS_FLOW_ATTR_KEY */
731 if (!sfid
|| should_fill_key(sfid
, ufid_flags
))
732 len
+= nla_total_size(ovs_key_attr_size());
734 /* OVS_FLOW_ATTR_MASK */
735 if (should_fill_mask(ufid_flags
))
736 len
+= nla_total_size(ovs_key_attr_size());
738 /* OVS_FLOW_ATTR_ACTIONS */
739 if (should_fill_actions(ufid_flags
))
740 len
+= nla_total_size(acts
->orig_len
);
743 + nla_total_size_64bit(sizeof(struct ovs_flow_stats
)) /* OVS_FLOW_ATTR_STATS */
744 + nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
745 + nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
748 /* Called with ovs_mutex or RCU read lock. */
749 static int ovs_flow_cmd_fill_stats(const struct sw_flow
*flow
,
752 struct ovs_flow_stats stats
;
756 ovs_flow_stats_get(flow
, &stats
, &used
, &tcp_flags
);
759 nla_put_u64_64bit(skb
, OVS_FLOW_ATTR_USED
, ovs_flow_used_time(used
),
763 if (stats
.n_packets
&&
764 nla_put_64bit(skb
, OVS_FLOW_ATTR_STATS
,
765 sizeof(struct ovs_flow_stats
), &stats
,
769 if ((u8
)ntohs(tcp_flags
) &&
770 nla_put_u8(skb
, OVS_FLOW_ATTR_TCP_FLAGS
, (u8
)ntohs(tcp_flags
)))
776 /* Called with ovs_mutex or RCU read lock. */
777 static int ovs_flow_cmd_fill_actions(const struct sw_flow
*flow
,
778 struct sk_buff
*skb
, int skb_orig_len
)
780 struct nlattr
*start
;
783 /* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
784 * this is the first flow to be dumped into 'skb'. This is unusual for
785 * Netlink but individual action lists can be longer than
786 * NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
787 * The userspace caller can always fetch the actions separately if it
788 * really wants them. (Most userspace callers in fact don't care.)
790 * This can only fail for dump operations because the skb is always
791 * properly sized for single flows.
793 start
= nla_nest_start_noflag(skb
, OVS_FLOW_ATTR_ACTIONS
);
795 const struct sw_flow_actions
*sf_acts
;
797 sf_acts
= rcu_dereference_ovsl(flow
->sf_acts
);
798 err
= ovs_nla_put_actions(sf_acts
->actions
,
799 sf_acts
->actions_len
, skb
);
802 nla_nest_end(skb
, start
);
807 nla_nest_cancel(skb
, start
);
809 } else if (skb_orig_len
) {
816 /* Called with ovs_mutex or RCU read lock. */
817 static int ovs_flow_cmd_fill_info(const struct sw_flow
*flow
, int dp_ifindex
,
818 struct sk_buff
*skb
, u32 portid
,
819 u32 seq
, u32 flags
, u8 cmd
, u32 ufid_flags
)
821 const int skb_orig_len
= skb
->len
;
822 struct ovs_header
*ovs_header
;
825 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_flow_genl_family
,
830 ovs_header
->dp_ifindex
= dp_ifindex
;
832 err
= ovs_nla_put_identifier(flow
, skb
);
836 if (should_fill_key(&flow
->id
, ufid_flags
)) {
837 err
= ovs_nla_put_masked_key(flow
, skb
);
842 if (should_fill_mask(ufid_flags
)) {
843 err
= ovs_nla_put_mask(flow
, skb
);
848 err
= ovs_flow_cmd_fill_stats(flow
, skb
);
852 if (should_fill_actions(ufid_flags
)) {
853 err
= ovs_flow_cmd_fill_actions(flow
, skb
, skb_orig_len
);
858 genlmsg_end(skb
, ovs_header
);
862 genlmsg_cancel(skb
, ovs_header
);
866 /* May not be called with RCU read lock. */
867 static struct sk_buff
*ovs_flow_cmd_alloc_info(const struct sw_flow_actions
*acts
,
868 const struct sw_flow_id
*sfid
,
869 struct genl_info
*info
,
876 if (!always
&& !ovs_must_notify(&dp_flow_genl_family
, info
, 0))
879 len
= ovs_flow_cmd_msg_size(acts
, sfid
, ufid_flags
);
880 skb
= genlmsg_new(len
, GFP_KERNEL
);
882 return ERR_PTR(-ENOMEM
);
887 /* Called with ovs_mutex. */
888 static struct sk_buff
*ovs_flow_cmd_build_info(const struct sw_flow
*flow
,
890 struct genl_info
*info
, u8 cmd
,
891 bool always
, u32 ufid_flags
)
896 skb
= ovs_flow_cmd_alloc_info(ovsl_dereference(flow
->sf_acts
),
897 &flow
->id
, info
, always
, ufid_flags
);
898 if (IS_ERR_OR_NULL(skb
))
901 retval
= ovs_flow_cmd_fill_info(flow
, dp_ifindex
, skb
,
902 info
->snd_portid
, info
->snd_seq
, 0,
908 static int ovs_flow_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
910 struct net
*net
= sock_net(skb
->sk
);
911 struct nlattr
**a
= info
->attrs
;
912 struct ovs_header
*ovs_header
= info
->userhdr
;
913 struct sw_flow
*flow
= NULL
, *new_flow
;
914 struct sw_flow_mask mask
;
915 struct sk_buff
*reply
;
917 struct sw_flow_actions
*acts
;
918 struct sw_flow_match match
;
919 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
921 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
923 /* Must have key and actions. */
925 if (!a
[OVS_FLOW_ATTR_KEY
]) {
926 OVS_NLERR(log
, "Flow key attr not present in new flow.");
929 if (!a
[OVS_FLOW_ATTR_ACTIONS
]) {
930 OVS_NLERR(log
, "Flow actions attr not present in new flow.");
934 /* Most of the time we need to allocate a new flow, do it before
937 new_flow
= ovs_flow_alloc();
938 if (IS_ERR(new_flow
)) {
939 error
= PTR_ERR(new_flow
);
944 ovs_match_init(&match
, &new_flow
->key
, false, &mask
);
945 error
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
946 a
[OVS_FLOW_ATTR_MASK
], log
);
950 /* Extract flow identifier. */
951 error
= ovs_nla_get_identifier(&new_flow
->id
, a
[OVS_FLOW_ATTR_UFID
],
952 &new_flow
->key
, log
);
956 /* unmasked key is needed to match when ufid is not used. */
957 if (ovs_identifier_is_key(&new_flow
->id
))
958 match
.key
= new_flow
->id
.unmasked_key
;
960 ovs_flow_mask_key(&new_flow
->key
, &new_flow
->key
, true, &mask
);
962 /* Validate actions. */
963 error
= ovs_nla_copy_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
],
964 &new_flow
->key
, &acts
, log
);
966 OVS_NLERR(log
, "Flow actions may not be safe on all matching packets.");
970 reply
= ovs_flow_cmd_alloc_info(acts
, &new_flow
->id
, info
, false,
973 error
= PTR_ERR(reply
);
978 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
984 /* Check if this is a duplicate flow */
985 if (ovs_identifier_is_ufid(&new_flow
->id
))
986 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &new_flow
->id
);
988 flow
= ovs_flow_tbl_lookup(&dp
->table
, &new_flow
->key
);
990 rcu_assign_pointer(new_flow
->sf_acts
, acts
);
992 /* Put flow in bucket. */
993 error
= ovs_flow_tbl_insert(&dp
->table
, new_flow
, &mask
);
994 if (unlikely(error
)) {
999 if (unlikely(reply
)) {
1000 error
= ovs_flow_cmd_fill_info(new_flow
,
1001 ovs_header
->dp_ifindex
,
1002 reply
, info
->snd_portid
,
1010 struct sw_flow_actions
*old_acts
;
1012 /* Bail out if we're not allowed to modify an existing flow.
1013 * We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
1014 * because Generic Netlink treats the latter as a dump
1015 * request. We also accept NLM_F_EXCL in case that bug ever
1018 if (unlikely(info
->nlhdr
->nlmsg_flags
& (NLM_F_CREATE
1021 goto err_unlock_ovs
;
1023 /* The flow identifier has to be the same for flow updates.
1024 * Look for any overlapping flow.
1026 if (unlikely(!ovs_flow_cmp(flow
, &match
))) {
1027 if (ovs_identifier_is_key(&flow
->id
))
1028 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
,
1030 else /* UFID matches but key is different */
1034 goto err_unlock_ovs
;
1037 /* Update actions. */
1038 old_acts
= ovsl_dereference(flow
->sf_acts
);
1039 rcu_assign_pointer(flow
->sf_acts
, acts
);
1041 if (unlikely(reply
)) {
1042 error
= ovs_flow_cmd_fill_info(flow
,
1043 ovs_header
->dp_ifindex
,
1044 reply
, info
->snd_portid
,
1052 ovs_nla_free_flow_actions_rcu(old_acts
);
1053 ovs_flow_free(new_flow
, false);
1057 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1064 ovs_nla_free_flow_actions(acts
);
1066 ovs_flow_free(new_flow
, false);
1071 /* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
1072 static noinline_for_stack
struct sw_flow_actions
*get_flow_actions(struct net
*net
,
1073 const struct nlattr
*a
,
1074 const struct sw_flow_key
*key
,
1075 const struct sw_flow_mask
*mask
,
1078 struct sw_flow_actions
*acts
;
1079 struct sw_flow_key masked_key
;
1082 ovs_flow_mask_key(&masked_key
, key
, true, mask
);
1083 error
= ovs_nla_copy_actions(net
, a
, &masked_key
, &acts
, log
);
1086 "Actions may not be safe on all matching packets");
1087 return ERR_PTR(error
);
1093 /* Factor out match-init and action-copy to avoid
1094 * "Wframe-larger-than=1024" warning. Because mask is only
1095 * used to get actions, we new a function to save some
1098 * If there are not key and action attrs, we return 0
1099 * directly. In the case, the caller will also not use the
1100 * match as before. If there is action attr, we try to get
1101 * actions and save them to *acts. Before returning from
1102 * the function, we reset the match->mask pointer. Because
1103 * we should not to return match object with dangling reference
1106 static noinline_for_stack
int
1107 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.");
1133 *acts
= get_flow_actions(net
, a
[OVS_FLOW_ATTR_ACTIONS
], key
,
1135 if (IS_ERR(*acts
)) {
1136 error
= PTR_ERR(*acts
);
1141 /* On success, error is 0. */
1147 static int ovs_flow_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1149 struct net
*net
= sock_net(skb
->sk
);
1150 struct nlattr
**a
= info
->attrs
;
1151 struct ovs_header
*ovs_header
= info
->userhdr
;
1152 struct sw_flow_key key
;
1153 struct sw_flow
*flow
;
1154 struct sk_buff
*reply
= NULL
;
1155 struct datapath
*dp
;
1156 struct sw_flow_actions
*old_acts
= NULL
, *acts
= NULL
;
1157 struct sw_flow_match match
;
1158 struct sw_flow_id sfid
;
1159 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1161 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1164 ufid_present
= ovs_nla_get_ufid(&sfid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1165 if (!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
) {
1167 "Flow set message rejected, Key attribute missing.");
1171 error
= ovs_nla_init_match_and_action(net
, &match
, &key
, a
,
1177 /* Can allocate before locking if have acts. */
1178 reply
= ovs_flow_cmd_alloc_info(acts
, &sfid
, info
, false,
1180 if (IS_ERR(reply
)) {
1181 error
= PTR_ERR(reply
);
1182 goto err_kfree_acts
;
1187 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1188 if (unlikely(!dp
)) {
1190 goto err_unlock_ovs
;
1192 /* Check that the flow exists. */
1194 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &sfid
);
1196 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1197 if (unlikely(!flow
)) {
1199 goto err_unlock_ovs
;
1202 /* Update actions, if present. */
1204 old_acts
= ovsl_dereference(flow
->sf_acts
);
1205 rcu_assign_pointer(flow
->sf_acts
, acts
);
1207 if (unlikely(reply
)) {
1208 error
= ovs_flow_cmd_fill_info(flow
,
1209 ovs_header
->dp_ifindex
,
1210 reply
, info
->snd_portid
,
1217 /* Could not alloc without acts before locking. */
1218 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
,
1219 info
, OVS_FLOW_CMD_SET
, false,
1222 if (IS_ERR(reply
)) {
1223 error
= PTR_ERR(reply
);
1224 goto err_unlock_ovs
;
1229 if (a
[OVS_FLOW_ATTR_CLEAR
])
1230 ovs_flow_stats_clear(flow
);
1234 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1236 ovs_nla_free_flow_actions_rcu(old_acts
);
1244 ovs_nla_free_flow_actions(acts
);
1249 static int ovs_flow_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1251 struct nlattr
**a
= info
->attrs
;
1252 struct ovs_header
*ovs_header
= info
->userhdr
;
1253 struct net
*net
= sock_net(skb
->sk
);
1254 struct sw_flow_key key
;
1255 struct sk_buff
*reply
;
1256 struct sw_flow
*flow
;
1257 struct datapath
*dp
;
1258 struct sw_flow_match match
;
1259 struct sw_flow_id ufid
;
1260 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1262 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1265 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1266 if (a
[OVS_FLOW_ATTR_KEY
]) {
1267 ovs_match_init(&match
, &key
, true, NULL
);
1268 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
], NULL
,
1270 } else if (!ufid_present
) {
1272 "Flow get message rejected, Key attribute missing.");
1279 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1286 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1288 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1294 reply
= ovs_flow_cmd_build_info(flow
, ovs_header
->dp_ifindex
, info
,
1295 OVS_FLOW_CMD_GET
, true, ufid_flags
);
1296 if (IS_ERR(reply
)) {
1297 err
= PTR_ERR(reply
);
1302 return genlmsg_reply(reply
, info
);
1308 static int ovs_flow_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1310 struct nlattr
**a
= info
->attrs
;
1311 struct ovs_header
*ovs_header
= info
->userhdr
;
1312 struct net
*net
= sock_net(skb
->sk
);
1313 struct sw_flow_key key
;
1314 struct sk_buff
*reply
;
1315 struct sw_flow
*flow
= NULL
;
1316 struct datapath
*dp
;
1317 struct sw_flow_match match
;
1318 struct sw_flow_id ufid
;
1319 u32 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1321 bool log
= !a
[OVS_FLOW_ATTR_PROBE
];
1324 ufid_present
= ovs_nla_get_ufid(&ufid
, a
[OVS_FLOW_ATTR_UFID
], log
);
1325 if (a
[OVS_FLOW_ATTR_KEY
]) {
1326 ovs_match_init(&match
, &key
, true, NULL
);
1327 err
= ovs_nla_get_match(net
, &match
, a
[OVS_FLOW_ATTR_KEY
],
1334 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1335 if (unlikely(!dp
)) {
1340 if (unlikely(!a
[OVS_FLOW_ATTR_KEY
] && !ufid_present
)) {
1341 err
= ovs_flow_tbl_flush(&dp
->table
);
1346 flow
= ovs_flow_tbl_lookup_ufid(&dp
->table
, &ufid
);
1348 flow
= ovs_flow_tbl_lookup_exact(&dp
->table
, &match
);
1349 if (unlikely(!flow
)) {
1354 ovs_flow_tbl_remove(&dp
->table
, flow
);
1357 reply
= ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force
*) flow
->sf_acts
,
1358 &flow
->id
, info
, false, ufid_flags
);
1359 if (likely(reply
)) {
1360 if (!IS_ERR(reply
)) {
1361 rcu_read_lock(); /*To keep RCU checker happy. */
1362 err
= ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
,
1363 reply
, info
->snd_portid
,
1370 ovs_notify(&dp_flow_genl_family
, reply
, info
);
1372 netlink_set_err(sock_net(skb
->sk
)->genl_sock
, 0, 0, PTR_ERR(reply
));
1376 ovs_flow_free(flow
, true);
1383 static int ovs_flow_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1385 struct nlattr
*a
[__OVS_FLOW_ATTR_MAX
];
1386 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
1387 struct table_instance
*ti
;
1388 struct datapath
*dp
;
1392 err
= genlmsg_parse_deprecated(cb
->nlh
, &dp_flow_genl_family
, a
,
1393 OVS_FLOW_ATTR_MAX
, flow_policy
, NULL
);
1396 ufid_flags
= ovs_nla_get_ufid_flags(a
[OVS_FLOW_ATTR_UFID_FLAGS
]);
1399 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
1405 ti
= rcu_dereference(dp
->table
.ti
);
1407 struct sw_flow
*flow
;
1410 bucket
= cb
->args
[0];
1412 flow
= ovs_flow_tbl_dump_next(ti
, &bucket
, &obj
);
1416 if (ovs_flow_cmd_fill_info(flow
, ovs_header
->dp_ifindex
, skb
,
1417 NETLINK_CB(cb
->skb
).portid
,
1418 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1419 OVS_FLOW_CMD_GET
, ufid_flags
) < 0)
1422 cb
->args
[0] = bucket
;
1429 static const struct nla_policy flow_policy
[OVS_FLOW_ATTR_MAX
+ 1] = {
1430 [OVS_FLOW_ATTR_KEY
] = { .type
= NLA_NESTED
},
1431 [OVS_FLOW_ATTR_MASK
] = { .type
= NLA_NESTED
},
1432 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NLA_NESTED
},
1433 [OVS_FLOW_ATTR_CLEAR
] = { .type
= NLA_FLAG
},
1434 [OVS_FLOW_ATTR_PROBE
] = { .type
= NLA_FLAG
},
1435 [OVS_FLOW_ATTR_UFID
] = { .type
= NLA_UNSPEC
, .len
= 1 },
1436 [OVS_FLOW_ATTR_UFID_FLAGS
] = { .type
= NLA_U32
},
1439 static const struct genl_ops dp_flow_genl_ops
[] = {
1440 { .cmd
= OVS_FLOW_CMD_NEW
,
1441 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1442 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1443 .doit
= ovs_flow_cmd_new
1445 { .cmd
= OVS_FLOW_CMD_DEL
,
1446 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1447 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1448 .doit
= ovs_flow_cmd_del
1450 { .cmd
= OVS_FLOW_CMD_GET
,
1451 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1452 .flags
= 0, /* OK for unprivileged users. */
1453 .doit
= ovs_flow_cmd_get
,
1454 .dumpit
= ovs_flow_cmd_dump
1456 { .cmd
= OVS_FLOW_CMD_SET
,
1457 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1458 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1459 .doit
= ovs_flow_cmd_set
,
1463 static struct genl_family dp_flow_genl_family __ro_after_init
= {
1464 .hdrsize
= sizeof(struct ovs_header
),
1465 .name
= OVS_FLOW_FAMILY
,
1466 .version
= OVS_FLOW_VERSION
,
1467 .maxattr
= OVS_FLOW_ATTR_MAX
,
1468 .policy
= flow_policy
,
1470 .parallel_ops
= true,
1471 .ops
= dp_flow_genl_ops
,
1472 .n_ops
= ARRAY_SIZE(dp_flow_genl_ops
),
1473 .mcgrps
= &ovs_dp_flow_multicast_group
,
1475 .module
= THIS_MODULE
,
1478 static size_t ovs_dp_cmd_msg_size(void)
1480 size_t msgsize
= NLMSG_ALIGN(sizeof(struct ovs_header
));
1482 msgsize
+= nla_total_size(IFNAMSIZ
);
1483 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_stats
));
1484 msgsize
+= nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats
));
1485 msgsize
+= nla_total_size(sizeof(u32
)); /* OVS_DP_ATTR_USER_FEATURES */
1490 /* Called with ovs_mutex. */
1491 static int ovs_dp_cmd_fill_info(struct datapath
*dp
, struct sk_buff
*skb
,
1492 u32 portid
, u32 seq
, u32 flags
, u8 cmd
)
1494 struct ovs_header
*ovs_header
;
1495 struct ovs_dp_stats dp_stats
;
1496 struct ovs_dp_megaflow_stats dp_megaflow_stats
;
1499 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_datapath_genl_family
,
1504 ovs_header
->dp_ifindex
= get_dpifindex(dp
);
1506 err
= nla_put_string(skb
, OVS_DP_ATTR_NAME
, ovs_dp_name(dp
));
1508 goto nla_put_failure
;
1510 get_dp_stats(dp
, &dp_stats
, &dp_megaflow_stats
);
1511 if (nla_put_64bit(skb
, OVS_DP_ATTR_STATS
, sizeof(struct ovs_dp_stats
),
1512 &dp_stats
, OVS_DP_ATTR_PAD
))
1513 goto nla_put_failure
;
1515 if (nla_put_64bit(skb
, OVS_DP_ATTR_MEGAFLOW_STATS
,
1516 sizeof(struct ovs_dp_megaflow_stats
),
1517 &dp_megaflow_stats
, OVS_DP_ATTR_PAD
))
1518 goto nla_put_failure
;
1520 if (nla_put_u32(skb
, OVS_DP_ATTR_USER_FEATURES
, dp
->user_features
))
1521 goto nla_put_failure
;
1523 genlmsg_end(skb
, ovs_header
);
1527 genlmsg_cancel(skb
, ovs_header
);
1532 static struct sk_buff
*ovs_dp_cmd_alloc_info(void)
1534 return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL
);
1537 /* Called with rcu_read_lock or ovs_mutex. */
1538 static struct datapath
*lookup_datapath(struct net
*net
,
1539 const struct ovs_header
*ovs_header
,
1540 struct nlattr
*a
[OVS_DP_ATTR_MAX
+ 1])
1542 struct datapath
*dp
;
1544 if (!a
[OVS_DP_ATTR_NAME
])
1545 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
1547 struct vport
*vport
;
1549 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_DP_ATTR_NAME
]));
1550 dp
= vport
&& vport
->port_no
== OVSP_LOCAL
? vport
->dp
: NULL
;
1552 return dp
? dp
: ERR_PTR(-ENODEV
);
1555 static void ovs_dp_reset_user_features(struct sk_buff
*skb
, struct genl_info
*info
)
1557 struct datapath
*dp
;
1559 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1563 WARN(dp
->user_features
, "Dropping previously announced user features\n");
1564 dp
->user_features
= 0;
1567 DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support
);
1569 static int ovs_dp_change(struct datapath
*dp
, struct nlattr
*a
[])
1571 u32 user_features
= 0;
1573 if (a
[OVS_DP_ATTR_USER_FEATURES
]) {
1574 user_features
= nla_get_u32(a
[OVS_DP_ATTR_USER_FEATURES
]);
1576 if (user_features
& ~(OVS_DP_F_VPORT_PIDS
|
1577 OVS_DP_F_UNALIGNED
|
1578 OVS_DP_F_TC_RECIRC_SHARING
))
1581 #if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
1582 if (user_features
& OVS_DP_F_TC_RECIRC_SHARING
)
1587 dp
->user_features
= user_features
;
1589 if (dp
->user_features
& OVS_DP_F_TC_RECIRC_SHARING
)
1590 static_branch_enable(&tc_recirc_sharing_support
);
1592 static_branch_disable(&tc_recirc_sharing_support
);
1597 static int ovs_dp_stats_init(struct datapath
*dp
)
1599 dp
->stats_percpu
= netdev_alloc_pcpu_stats(struct dp_stats_percpu
);
1600 if (!dp
->stats_percpu
)
1606 static int ovs_dp_vport_init(struct datapath
*dp
)
1610 dp
->ports
= kmalloc_array(DP_VPORT_HASH_BUCKETS
,
1611 sizeof(struct hlist_head
),
1616 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
1617 INIT_HLIST_HEAD(&dp
->ports
[i
]);
1622 static int ovs_dp_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
1624 struct nlattr
**a
= info
->attrs
;
1625 struct vport_parms parms
;
1626 struct sk_buff
*reply
;
1627 struct datapath
*dp
;
1628 struct vport
*vport
;
1629 struct ovs_net
*ovs_net
;
1633 if (!a
[OVS_DP_ATTR_NAME
] || !a
[OVS_DP_ATTR_UPCALL_PID
])
1636 reply
= ovs_dp_cmd_alloc_info();
1641 dp
= kzalloc(sizeof(*dp
), GFP_KERNEL
);
1643 goto err_destroy_reply
;
1645 ovs_dp_set_net(dp
, sock_net(skb
->sk
));
1647 /* Allocate table. */
1648 err
= ovs_flow_tbl_init(&dp
->table
);
1650 goto err_destroy_dp
;
1652 err
= ovs_dp_stats_init(dp
);
1654 goto err_destroy_table
;
1656 err
= ovs_dp_vport_init(dp
);
1658 goto err_destroy_stats
;
1660 err
= ovs_meters_init(dp
);
1662 goto err_destroy_ports
;
1664 /* Set up our datapath device. */
1665 parms
.name
= nla_data(a
[OVS_DP_ATTR_NAME
]);
1666 parms
.type
= OVS_VPORT_TYPE_INTERNAL
;
1667 parms
.options
= NULL
;
1669 parms
.port_no
= OVSP_LOCAL
;
1670 parms
.upcall_portids
= a
[OVS_DP_ATTR_UPCALL_PID
];
1672 err
= ovs_dp_change(dp
, a
);
1674 goto err_destroy_meters
;
1676 /* So far only local changes have been made, now need the lock. */
1679 vport
= new_vport(&parms
);
1680 if (IS_ERR(vport
)) {
1681 err
= PTR_ERR(vport
);
1685 if (err
== -EEXIST
) {
1686 /* An outdated user space instance that does not understand
1687 * the concept of user_features has attempted to create a new
1688 * datapath and is likely to reuse it. Drop all user features.
1690 if (info
->genlhdr
->version
< OVS_DP_VER_FEATURES
)
1691 ovs_dp_reset_user_features(skb
, info
);
1695 goto err_destroy_meters
;
1698 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1699 info
->snd_seq
, 0, OVS_DP_CMD_NEW
);
1702 ovs_net
= net_generic(ovs_dp_get_net(dp
), ovs_net_id
);
1703 list_add_tail_rcu(&dp
->list_node
, &ovs_net
->dps
);
1707 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1711 ovs_meters_exit(dp
);
1715 free_percpu(dp
->stats_percpu
);
1717 ovs_flow_tbl_destroy(&dp
->table
);
1726 /* Called with ovs_mutex. */
1727 static void __dp_destroy(struct datapath
*dp
)
1731 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
1732 struct vport
*vport
;
1733 struct hlist_node
*n
;
1735 hlist_for_each_entry_safe(vport
, n
, &dp
->ports
[i
], dp_hash_node
)
1736 if (vport
->port_no
!= OVSP_LOCAL
)
1737 ovs_dp_detach_port(vport
);
1740 list_del_rcu(&dp
->list_node
);
1742 /* OVSP_LOCAL is datapath internal port. We need to make sure that
1743 * all ports in datapath are destroyed first before freeing datapath.
1745 ovs_dp_detach_port(ovs_vport_ovsl(dp
, OVSP_LOCAL
));
1747 /* RCU destroy the flow table */
1748 call_rcu(&dp
->rcu
, destroy_dp_rcu
);
1751 static int ovs_dp_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
1753 struct sk_buff
*reply
;
1754 struct datapath
*dp
;
1757 reply
= ovs_dp_cmd_alloc_info();
1762 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1765 goto err_unlock_free
;
1767 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1768 info
->snd_seq
, 0, OVS_DP_CMD_DEL
);
1774 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1784 static int ovs_dp_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
1786 struct sk_buff
*reply
;
1787 struct datapath
*dp
;
1790 reply
= ovs_dp_cmd_alloc_info();
1795 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1798 goto err_unlock_free
;
1800 err
= ovs_dp_change(dp
, info
->attrs
);
1802 goto err_unlock_free
;
1804 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1805 info
->snd_seq
, 0, OVS_DP_CMD_SET
);
1809 ovs_notify(&dp_datapath_genl_family
, reply
, info
);
1819 static int ovs_dp_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
1821 struct sk_buff
*reply
;
1822 struct datapath
*dp
;
1825 reply
= ovs_dp_cmd_alloc_info();
1830 dp
= lookup_datapath(sock_net(skb
->sk
), info
->userhdr
, info
->attrs
);
1833 goto err_unlock_free
;
1835 err
= ovs_dp_cmd_fill_info(dp
, reply
, info
->snd_portid
,
1836 info
->snd_seq
, 0, OVS_DP_CMD_GET
);
1840 return genlmsg_reply(reply
, info
);
1848 static int ovs_dp_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1850 struct ovs_net
*ovs_net
= net_generic(sock_net(skb
->sk
), ovs_net_id
);
1851 struct datapath
*dp
;
1852 int skip
= cb
->args
[0];
1856 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
1858 ovs_dp_cmd_fill_info(dp
, skb
, NETLINK_CB(cb
->skb
).portid
,
1859 cb
->nlh
->nlmsg_seq
, NLM_F_MULTI
,
1860 OVS_DP_CMD_GET
) < 0)
1871 static const struct nla_policy datapath_policy
[OVS_DP_ATTR_MAX
+ 1] = {
1872 [OVS_DP_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
1873 [OVS_DP_ATTR_UPCALL_PID
] = { .type
= NLA_U32
},
1874 [OVS_DP_ATTR_USER_FEATURES
] = { .type
= NLA_U32
},
1877 static const struct genl_ops dp_datapath_genl_ops
[] = {
1878 { .cmd
= OVS_DP_CMD_NEW
,
1879 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1880 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1881 .doit
= ovs_dp_cmd_new
1883 { .cmd
= OVS_DP_CMD_DEL
,
1884 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1885 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1886 .doit
= ovs_dp_cmd_del
1888 { .cmd
= OVS_DP_CMD_GET
,
1889 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1890 .flags
= 0, /* OK for unprivileged users. */
1891 .doit
= ovs_dp_cmd_get
,
1892 .dumpit
= ovs_dp_cmd_dump
1894 { .cmd
= OVS_DP_CMD_SET
,
1895 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
1896 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
1897 .doit
= ovs_dp_cmd_set
,
1901 static struct genl_family dp_datapath_genl_family __ro_after_init
= {
1902 .hdrsize
= sizeof(struct ovs_header
),
1903 .name
= OVS_DATAPATH_FAMILY
,
1904 .version
= OVS_DATAPATH_VERSION
,
1905 .maxattr
= OVS_DP_ATTR_MAX
,
1906 .policy
= datapath_policy
,
1908 .parallel_ops
= true,
1909 .ops
= dp_datapath_genl_ops
,
1910 .n_ops
= ARRAY_SIZE(dp_datapath_genl_ops
),
1911 .mcgrps
= &ovs_dp_datapath_multicast_group
,
1913 .module
= THIS_MODULE
,
1916 /* Called with ovs_mutex or RCU read lock. */
1917 static int ovs_vport_cmd_fill_info(struct vport
*vport
, struct sk_buff
*skb
,
1918 struct net
*net
, u32 portid
, u32 seq
,
1919 u32 flags
, u8 cmd
, gfp_t gfp
)
1921 struct ovs_header
*ovs_header
;
1922 struct ovs_vport_stats vport_stats
;
1925 ovs_header
= genlmsg_put(skb
, portid
, seq
, &dp_vport_genl_family
,
1930 ovs_header
->dp_ifindex
= get_dpifindex(vport
->dp
);
1932 if (nla_put_u32(skb
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
) ||
1933 nla_put_u32(skb
, OVS_VPORT_ATTR_TYPE
, vport
->ops
->type
) ||
1934 nla_put_string(skb
, OVS_VPORT_ATTR_NAME
,
1935 ovs_vport_name(vport
)) ||
1936 nla_put_u32(skb
, OVS_VPORT_ATTR_IFINDEX
, vport
->dev
->ifindex
))
1937 goto nla_put_failure
;
1939 if (!net_eq(net
, dev_net(vport
->dev
))) {
1940 int id
= peernet2id_alloc(net
, dev_net(vport
->dev
), gfp
);
1942 if (nla_put_s32(skb
, OVS_VPORT_ATTR_NETNSID
, id
))
1943 goto nla_put_failure
;
1946 ovs_vport_get_stats(vport
, &vport_stats
);
1947 if (nla_put_64bit(skb
, OVS_VPORT_ATTR_STATS
,
1948 sizeof(struct ovs_vport_stats
), &vport_stats
,
1949 OVS_VPORT_ATTR_PAD
))
1950 goto nla_put_failure
;
1952 if (ovs_vport_get_upcall_portids(vport
, skb
))
1953 goto nla_put_failure
;
1955 err
= ovs_vport_get_options(vport
, skb
);
1956 if (err
== -EMSGSIZE
)
1959 genlmsg_end(skb
, ovs_header
);
1965 genlmsg_cancel(skb
, ovs_header
);
1969 static struct sk_buff
*ovs_vport_cmd_alloc_info(void)
1971 return nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1974 /* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
1975 struct sk_buff
*ovs_vport_cmd_build_info(struct vport
*vport
, struct net
*net
,
1976 u32 portid
, u32 seq
, u8 cmd
)
1978 struct sk_buff
*skb
;
1981 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1983 return ERR_PTR(-ENOMEM
);
1985 retval
= ovs_vport_cmd_fill_info(vport
, skb
, net
, portid
, seq
, 0, cmd
,
1992 /* Called with ovs_mutex or RCU read lock. */
1993 static struct vport
*lookup_vport(struct net
*net
,
1994 const struct ovs_header
*ovs_header
,
1995 struct nlattr
*a
[OVS_VPORT_ATTR_MAX
+ 1])
1997 struct datapath
*dp
;
1998 struct vport
*vport
;
2000 if (a
[OVS_VPORT_ATTR_IFINDEX
])
2001 return ERR_PTR(-EOPNOTSUPP
);
2002 if (a
[OVS_VPORT_ATTR_NAME
]) {
2003 vport
= ovs_vport_locate(net
, nla_data(a
[OVS_VPORT_ATTR_NAME
]));
2005 return ERR_PTR(-ENODEV
);
2006 if (ovs_header
->dp_ifindex
&&
2007 ovs_header
->dp_ifindex
!= get_dpifindex(vport
->dp
))
2008 return ERR_PTR(-ENODEV
);
2010 } else if (a
[OVS_VPORT_ATTR_PORT_NO
]) {
2011 u32 port_no
= nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
2013 if (port_no
>= DP_MAX_PORTS
)
2014 return ERR_PTR(-EFBIG
);
2016 dp
= get_dp(net
, ovs_header
->dp_ifindex
);
2018 return ERR_PTR(-ENODEV
);
2020 vport
= ovs_vport_ovsl_rcu(dp
, port_no
);
2022 return ERR_PTR(-ENODEV
);
2025 return ERR_PTR(-EINVAL
);
2029 static unsigned int ovs_get_max_headroom(struct datapath
*dp
)
2031 unsigned int dev_headroom
, max_headroom
= 0;
2032 struct net_device
*dev
;
2033 struct vport
*vport
;
2036 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2037 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2039 dev_headroom
= netdev_get_fwd_headroom(dev
);
2040 if (dev_headroom
> max_headroom
)
2041 max_headroom
= dev_headroom
;
2045 return max_headroom
;
2048 /* Called with ovs_mutex */
2049 static void ovs_update_headroom(struct datapath
*dp
, unsigned int new_headroom
)
2051 struct vport
*vport
;
2054 dp
->max_headroom
= new_headroom
;
2055 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++)
2056 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
)
2057 netdev_set_rx_headroom(vport
->dev
, new_headroom
);
2060 static int ovs_vport_cmd_new(struct sk_buff
*skb
, struct genl_info
*info
)
2062 struct nlattr
**a
= info
->attrs
;
2063 struct ovs_header
*ovs_header
= info
->userhdr
;
2064 struct vport_parms parms
;
2065 struct sk_buff
*reply
;
2066 struct vport
*vport
;
2067 struct datapath
*dp
;
2068 unsigned int new_headroom
;
2072 if (!a
[OVS_VPORT_ATTR_NAME
] || !a
[OVS_VPORT_ATTR_TYPE
] ||
2073 !a
[OVS_VPORT_ATTR_UPCALL_PID
])
2075 if (a
[OVS_VPORT_ATTR_IFINDEX
])
2078 port_no
= a
[OVS_VPORT_ATTR_PORT_NO
]
2079 ? nla_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]) : 0;
2080 if (port_no
>= DP_MAX_PORTS
)
2083 reply
= ovs_vport_cmd_alloc_info();
2089 dp
= get_dp(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2092 goto exit_unlock_free
;
2095 vport
= ovs_vport_ovsl(dp
, port_no
);
2098 goto exit_unlock_free
;
2100 for (port_no
= 1; ; port_no
++) {
2101 if (port_no
>= DP_MAX_PORTS
) {
2103 goto exit_unlock_free
;
2105 vport
= ovs_vport_ovsl(dp
, port_no
);
2111 parms
.name
= nla_data(a
[OVS_VPORT_ATTR_NAME
]);
2112 parms
.type
= nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
2113 parms
.options
= a
[OVS_VPORT_ATTR_OPTIONS
];
2115 parms
.port_no
= port_no
;
2116 parms
.upcall_portids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2118 vport
= new_vport(&parms
);
2119 err
= PTR_ERR(vport
);
2120 if (IS_ERR(vport
)) {
2123 goto exit_unlock_free
;
2126 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2127 info
->snd_portid
, info
->snd_seq
, 0,
2128 OVS_VPORT_CMD_NEW
, GFP_KERNEL
);
2130 new_headroom
= netdev_get_fwd_headroom(vport
->dev
);
2132 if (new_headroom
> dp
->max_headroom
)
2133 ovs_update_headroom(dp
, new_headroom
);
2135 netdev_set_rx_headroom(vport
->dev
, dp
->max_headroom
);
2140 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2149 static int ovs_vport_cmd_set(struct sk_buff
*skb
, struct genl_info
*info
)
2151 struct nlattr
**a
= info
->attrs
;
2152 struct sk_buff
*reply
;
2153 struct vport
*vport
;
2156 reply
= ovs_vport_cmd_alloc_info();
2161 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2162 err
= PTR_ERR(vport
);
2164 goto exit_unlock_free
;
2166 if (a
[OVS_VPORT_ATTR_TYPE
] &&
2167 nla_get_u32(a
[OVS_VPORT_ATTR_TYPE
]) != vport
->ops
->type
) {
2169 goto exit_unlock_free
;
2172 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
2173 err
= ovs_vport_set_options(vport
, a
[OVS_VPORT_ATTR_OPTIONS
]);
2175 goto exit_unlock_free
;
2179 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
2180 struct nlattr
*ids
= a
[OVS_VPORT_ATTR_UPCALL_PID
];
2182 err
= ovs_vport_set_upcall_portids(vport
, ids
);
2184 goto exit_unlock_free
;
2187 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2188 info
->snd_portid
, info
->snd_seq
, 0,
2189 OVS_VPORT_CMD_SET
, GFP_KERNEL
);
2193 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2202 static int ovs_vport_cmd_del(struct sk_buff
*skb
, struct genl_info
*info
)
2204 bool update_headroom
= false;
2205 struct nlattr
**a
= info
->attrs
;
2206 struct sk_buff
*reply
;
2207 struct datapath
*dp
;
2208 struct vport
*vport
;
2209 unsigned int new_headroom
;
2212 reply
= ovs_vport_cmd_alloc_info();
2217 vport
= lookup_vport(sock_net(skb
->sk
), info
->userhdr
, a
);
2218 err
= PTR_ERR(vport
);
2220 goto exit_unlock_free
;
2222 if (vport
->port_no
== OVSP_LOCAL
) {
2224 goto exit_unlock_free
;
2227 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2228 info
->snd_portid
, info
->snd_seq
, 0,
2229 OVS_VPORT_CMD_DEL
, GFP_KERNEL
);
2232 /* the vport deletion may trigger dp headroom update */
2234 if (netdev_get_fwd_headroom(vport
->dev
) == dp
->max_headroom
)
2235 update_headroom
= true;
2237 netdev_reset_rx_headroom(vport
->dev
);
2238 ovs_dp_detach_port(vport
);
2240 if (update_headroom
) {
2241 new_headroom
= ovs_get_max_headroom(dp
);
2243 if (new_headroom
< dp
->max_headroom
)
2244 ovs_update_headroom(dp
, new_headroom
);
2248 ovs_notify(&dp_vport_genl_family
, reply
, info
);
2257 static int ovs_vport_cmd_get(struct sk_buff
*skb
, struct genl_info
*info
)
2259 struct nlattr
**a
= info
->attrs
;
2260 struct ovs_header
*ovs_header
= info
->userhdr
;
2261 struct sk_buff
*reply
;
2262 struct vport
*vport
;
2265 reply
= ovs_vport_cmd_alloc_info();
2270 vport
= lookup_vport(sock_net(skb
->sk
), ovs_header
, a
);
2271 err
= PTR_ERR(vport
);
2273 goto exit_unlock_free
;
2274 err
= ovs_vport_cmd_fill_info(vport
, reply
, genl_info_net(info
),
2275 info
->snd_portid
, info
->snd_seq
, 0,
2276 OVS_VPORT_CMD_GET
, GFP_ATOMIC
);
2280 return genlmsg_reply(reply
, info
);
2288 static int ovs_vport_cmd_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2290 struct ovs_header
*ovs_header
= genlmsg_data(nlmsg_data(cb
->nlh
));
2291 struct datapath
*dp
;
2292 int bucket
= cb
->args
[0], skip
= cb
->args
[1];
2296 dp
= get_dp_rcu(sock_net(skb
->sk
), ovs_header
->dp_ifindex
);
2301 for (i
= bucket
; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2302 struct vport
*vport
;
2305 hlist_for_each_entry_rcu(vport
, &dp
->ports
[i
], dp_hash_node
) {
2307 ovs_vport_cmd_fill_info(vport
, skb
,
2309 NETLINK_CB(cb
->skb
).portid
,
2329 static const struct nla_policy vport_policy
[OVS_VPORT_ATTR_MAX
+ 1] = {
2330 [OVS_VPORT_ATTR_NAME
] = { .type
= NLA_NUL_STRING
, .len
= IFNAMSIZ
- 1 },
2331 [OVS_VPORT_ATTR_STATS
] = { .len
= sizeof(struct ovs_vport_stats
) },
2332 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NLA_U32
},
2333 [OVS_VPORT_ATTR_TYPE
] = { .type
= NLA_U32
},
2334 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NLA_UNSPEC
},
2335 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NLA_NESTED
},
2336 [OVS_VPORT_ATTR_IFINDEX
] = { .type
= NLA_U32
},
2337 [OVS_VPORT_ATTR_NETNSID
] = { .type
= NLA_S32
},
2340 static const struct genl_ops dp_vport_genl_ops
[] = {
2341 { .cmd
= OVS_VPORT_CMD_NEW
,
2342 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2343 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2344 .doit
= ovs_vport_cmd_new
2346 { .cmd
= OVS_VPORT_CMD_DEL
,
2347 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2348 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2349 .doit
= ovs_vport_cmd_del
2351 { .cmd
= OVS_VPORT_CMD_GET
,
2352 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2353 .flags
= 0, /* OK for unprivileged users. */
2354 .doit
= ovs_vport_cmd_get
,
2355 .dumpit
= ovs_vport_cmd_dump
2357 { .cmd
= OVS_VPORT_CMD_SET
,
2358 .validate
= GENL_DONT_VALIDATE_STRICT
| GENL_DONT_VALIDATE_DUMP
,
2359 .flags
= GENL_UNS_ADMIN_PERM
, /* Requires CAP_NET_ADMIN privilege. */
2360 .doit
= ovs_vport_cmd_set
,
2364 struct genl_family dp_vport_genl_family __ro_after_init
= {
2365 .hdrsize
= sizeof(struct ovs_header
),
2366 .name
= OVS_VPORT_FAMILY
,
2367 .version
= OVS_VPORT_VERSION
,
2368 .maxattr
= OVS_VPORT_ATTR_MAX
,
2369 .policy
= vport_policy
,
2371 .parallel_ops
= true,
2372 .ops
= dp_vport_genl_ops
,
2373 .n_ops
= ARRAY_SIZE(dp_vport_genl_ops
),
2374 .mcgrps
= &ovs_dp_vport_multicast_group
,
2376 .module
= THIS_MODULE
,
2379 static struct genl_family
* const dp_genl_families
[] = {
2380 &dp_datapath_genl_family
,
2381 &dp_vport_genl_family
,
2382 &dp_flow_genl_family
,
2383 &dp_packet_genl_family
,
2384 &dp_meter_genl_family
,
2385 #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
2386 &dp_ct_limit_genl_family
,
2390 static void dp_unregister_genl(int n_families
)
2394 for (i
= 0; i
< n_families
; i
++)
2395 genl_unregister_family(dp_genl_families
[i
]);
2398 static int __init
dp_register_genl(void)
2403 for (i
= 0; i
< ARRAY_SIZE(dp_genl_families
); i
++) {
2405 err
= genl_register_family(dp_genl_families
[i
]);
2413 dp_unregister_genl(i
);
2417 static int __net_init
ovs_init_net(struct net
*net
)
2419 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2421 INIT_LIST_HEAD(&ovs_net
->dps
);
2422 INIT_WORK(&ovs_net
->dp_notify_work
, ovs_dp_notify_wq
);
2423 return ovs_ct_init(net
);
2426 static void __net_exit
list_vports_from_net(struct net
*net
, struct net
*dnet
,
2427 struct list_head
*head
)
2429 struct ovs_net
*ovs_net
= net_generic(net
, ovs_net_id
);
2430 struct datapath
*dp
;
2432 list_for_each_entry(dp
, &ovs_net
->dps
, list_node
) {
2435 for (i
= 0; i
< DP_VPORT_HASH_BUCKETS
; i
++) {
2436 struct vport
*vport
;
2438 hlist_for_each_entry(vport
, &dp
->ports
[i
], dp_hash_node
) {
2439 if (vport
->ops
->type
!= OVS_VPORT_TYPE_INTERNAL
)
2442 if (dev_net(vport
->dev
) == dnet
)
2443 list_add(&vport
->detach_list
, head
);
2449 static void __net_exit
ovs_exit_net(struct net
*dnet
)
2451 struct datapath
*dp
, *dp_next
;
2452 struct ovs_net
*ovs_net
= net_generic(dnet
, ovs_net_id
);
2453 struct vport
*vport
, *vport_next
;
2459 list_for_each_entry_safe(dp
, dp_next
, &ovs_net
->dps
, list_node
)
2462 down_read(&net_rwsem
);
2464 list_vports_from_net(net
, dnet
, &head
);
2465 up_read(&net_rwsem
);
2467 /* Detach all vports from given namespace. */
2468 list_for_each_entry_safe(vport
, vport_next
, &head
, detach_list
) {
2469 list_del(&vport
->detach_list
);
2470 ovs_dp_detach_port(vport
);
2475 cancel_work_sync(&ovs_net
->dp_notify_work
);
2478 static struct pernet_operations ovs_net_ops
= {
2479 .init
= ovs_init_net
,
2480 .exit
= ovs_exit_net
,
2482 .size
= sizeof(struct ovs_net
),
2485 static int __init
dp_init(void)
2489 BUILD_BUG_ON(sizeof(struct ovs_skb_cb
) > FIELD_SIZEOF(struct sk_buff
, cb
));
2491 pr_info("Open vSwitch switching datapath\n");
2493 err
= action_fifos_init();
2497 err
= ovs_internal_dev_rtnl_link_register();
2499 goto error_action_fifos_exit
;
2501 err
= ovs_flow_init();
2503 goto error_unreg_rtnl_link
;
2505 err
= ovs_vport_init();
2507 goto error_flow_exit
;
2509 err
= register_pernet_device(&ovs_net_ops
);
2511 goto error_vport_exit
;
2513 err
= register_netdevice_notifier(&ovs_dp_device_notifier
);
2515 goto error_netns_exit
;
2517 err
= ovs_netdev_init();
2519 goto error_unreg_notifier
;
2521 err
= dp_register_genl();
2523 goto error_unreg_netdev
;
2529 error_unreg_notifier
:
2530 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2532 unregister_pernet_device(&ovs_net_ops
);
2537 error_unreg_rtnl_link
:
2538 ovs_internal_dev_rtnl_link_unregister();
2539 error_action_fifos_exit
:
2540 action_fifos_exit();
2545 static void dp_cleanup(void)
2547 dp_unregister_genl(ARRAY_SIZE(dp_genl_families
));
2549 unregister_netdevice_notifier(&ovs_dp_device_notifier
);
2550 unregister_pernet_device(&ovs_net_ops
);
2554 ovs_internal_dev_rtnl_link_unregister();
2555 action_fifos_exit();
2558 module_init(dp_init
);
2559 module_exit(dp_cleanup
);
2561 MODULE_DESCRIPTION("Open vSwitch switching datapath");
2562 MODULE_LICENSE("GPL");
2563 MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY
);
2564 MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY
);
2565 MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY
);
2566 MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY
);
2567 MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY
);
2568 MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY
);