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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
![Tonghao Zhang](/assets/img/avatar_default.png)
syzbot wrote:
| =============================
| WARNING: suspicious RCU usage
| 5.7.0-rc1+ #45 Not tainted
| -----------------------------
| net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!!
|
| other info that might help us debug this:
| rcu_scheduler_active = 2, debug_locks = 1
| ...
|
| stack backtrace:
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014
| Workqueue: netns cleanup_net
| Call Trace:
| ...
| ovs_ct_exit
| ovs_exit_net
| ops_exit_list.isra.7
| cleanup_net
| process_one_work
| worker_thread
To avoid that warning, invoke the ovs_ct_exit under ovs_lock and add
lockdep_ovsl_is_held as optional lockdep expression.
Link: https://lore.kernel.org/lkml/000000000000e642a905a0cbee6e@google.com
Fixes: 11efd5cb04
("openvswitch: Support conntrack zone limit")
Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Yi-Hung Wei <yihung.wei@gmail.com>
Reported-by: syzbot+7ef50afd3a211f879112@syzkaller.appspotmail.com
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2582 lines
63 KiB
C
2582 lines
63 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
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/*
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* Copyright (c) 2007-2014 Nicira, Inc.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/if_arp.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/jhash.h>
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#include <linux/delay.h>
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#include <linux/time.h>
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#include <linux/etherdevice.h>
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#include <linux/genetlink.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <linux/mutex.h>
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#include <linux/percpu.h>
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#include <linux/rcupdate.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/ethtool.h>
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#include <linux/wait.h>
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#include <asm/div64.h>
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#include <linux/highmem.h>
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#include <linux/netfilter_bridge.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/inetdevice.h>
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#include <linux/list.h>
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#include <linux/openvswitch.h>
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#include <linux/rculist.h>
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#include <linux/dmi.h>
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#include <net/genetlink.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include "datapath.h"
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#include "flow.h"
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#include "flow_table.h"
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#include "flow_netlink.h"
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#include "meter.h"
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#include "vport-internal_dev.h"
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#include "vport-netdev.h"
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unsigned int ovs_net_id __read_mostly;
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static struct genl_family dp_packet_genl_family;
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static struct genl_family dp_flow_genl_family;
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static struct genl_family dp_datapath_genl_family;
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static const struct nla_policy flow_policy[];
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static const struct genl_multicast_group ovs_dp_flow_multicast_group = {
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.name = OVS_FLOW_MCGROUP,
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};
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static const struct genl_multicast_group ovs_dp_datapath_multicast_group = {
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.name = OVS_DATAPATH_MCGROUP,
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};
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static const struct genl_multicast_group ovs_dp_vport_multicast_group = {
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.name = OVS_VPORT_MCGROUP,
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};
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/* Check if need to build a reply message.
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* OVS userspace sets the NLM_F_ECHO flag if it needs the reply. */
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static bool ovs_must_notify(struct genl_family *family, struct genl_info *info,
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unsigned int group)
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{
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return info->nlhdr->nlmsg_flags & NLM_F_ECHO ||
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genl_has_listeners(family, genl_info_net(info), group);
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}
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static void ovs_notify(struct genl_family *family,
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struct sk_buff *skb, struct genl_info *info)
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{
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genl_notify(family, skb, info, 0, GFP_KERNEL);
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}
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/**
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* DOC: Locking:
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*
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* All writes e.g. Writes to device state (add/remove datapath, port, set
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* operations on vports, etc.), Writes to other state (flow table
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* modifications, set miscellaneous datapath parameters, etc.) are protected
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* by ovs_lock.
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*
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* Reads are protected by RCU.
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*
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* There are a few special cases (mostly stats) that have their own
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* synchronization but they nest under all of above and don't interact with
|
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* each other.
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*
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* The RTNL lock nests inside ovs_mutex.
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*/
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static DEFINE_MUTEX(ovs_mutex);
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void ovs_lock(void)
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{
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mutex_lock(&ovs_mutex);
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}
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void ovs_unlock(void)
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{
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mutex_unlock(&ovs_mutex);
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}
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#ifdef CONFIG_LOCKDEP
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int lockdep_ovsl_is_held(void)
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{
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if (debug_locks)
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return lockdep_is_held(&ovs_mutex);
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else
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return 1;
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}
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#endif
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static struct vport *new_vport(const struct vport_parms *);
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static int queue_gso_packets(struct datapath *dp, struct sk_buff *,
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const struct sw_flow_key *,
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const struct dp_upcall_info *,
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uint32_t cutlen);
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static int queue_userspace_packet(struct datapath *dp, struct sk_buff *,
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const struct sw_flow_key *,
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const struct dp_upcall_info *,
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uint32_t cutlen);
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/* Must be called with rcu_read_lock or ovs_mutex. */
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const char *ovs_dp_name(const struct datapath *dp)
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{
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struct vport *vport = ovs_vport_ovsl_rcu(dp, OVSP_LOCAL);
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return ovs_vport_name(vport);
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}
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static int get_dpifindex(const struct datapath *dp)
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{
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struct vport *local;
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int ifindex;
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rcu_read_lock();
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local = ovs_vport_rcu(dp, OVSP_LOCAL);
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if (local)
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ifindex = local->dev->ifindex;
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else
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ifindex = 0;
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rcu_read_unlock();
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return ifindex;
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}
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static void destroy_dp_rcu(struct rcu_head *rcu)
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{
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struct datapath *dp = container_of(rcu, struct datapath, rcu);
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ovs_flow_tbl_destroy(&dp->table);
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free_percpu(dp->stats_percpu);
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kfree(dp->ports);
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ovs_meters_exit(dp);
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kfree(dp);
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}
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static struct hlist_head *vport_hash_bucket(const struct datapath *dp,
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u16 port_no)
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{
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return &dp->ports[port_no & (DP_VPORT_HASH_BUCKETS - 1)];
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}
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/* Called with ovs_mutex or RCU read lock. */
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struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
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{
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struct vport *vport;
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struct hlist_head *head;
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head = vport_hash_bucket(dp, port_no);
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hlist_for_each_entry_rcu(vport, head, dp_hash_node,
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lockdep_ovsl_is_held()) {
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if (vport->port_no == port_no)
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return vport;
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}
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return NULL;
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}
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/* Called with ovs_mutex. */
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static struct vport *new_vport(const struct vport_parms *parms)
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{
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struct vport *vport;
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vport = ovs_vport_add(parms);
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if (!IS_ERR(vport)) {
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struct datapath *dp = parms->dp;
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struct hlist_head *head = vport_hash_bucket(dp, vport->port_no);
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hlist_add_head_rcu(&vport->dp_hash_node, head);
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}
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return vport;
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}
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void ovs_dp_detach_port(struct vport *p)
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{
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ASSERT_OVSL();
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/* First drop references to device. */
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hlist_del_rcu(&p->dp_hash_node);
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/* Then destroy it. */
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ovs_vport_del(p);
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}
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/* Must be called with rcu_read_lock. */
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void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key)
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{
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const struct vport *p = OVS_CB(skb)->input_vport;
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struct datapath *dp = p->dp;
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struct sw_flow *flow;
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struct sw_flow_actions *sf_acts;
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struct dp_stats_percpu *stats;
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u64 *stats_counter;
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u32 n_mask_hit;
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int error;
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stats = this_cpu_ptr(dp->stats_percpu);
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/* Look up flow. */
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flow = ovs_flow_tbl_lookup_stats(&dp->table, key, skb_get_hash(skb),
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&n_mask_hit);
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if (unlikely(!flow)) {
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struct dp_upcall_info upcall;
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memset(&upcall, 0, sizeof(upcall));
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upcall.cmd = OVS_PACKET_CMD_MISS;
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upcall.portid = ovs_vport_find_upcall_portid(p, skb);
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upcall.mru = OVS_CB(skb)->mru;
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error = ovs_dp_upcall(dp, skb, key, &upcall, 0);
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if (unlikely(error))
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kfree_skb(skb);
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else
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consume_skb(skb);
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stats_counter = &stats->n_missed;
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goto out;
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}
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ovs_flow_stats_update(flow, key->tp.flags, skb);
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sf_acts = rcu_dereference(flow->sf_acts);
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error = ovs_execute_actions(dp, skb, sf_acts, key);
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if (unlikely(error))
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net_dbg_ratelimited("ovs: action execution error on datapath %s: %d\n",
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ovs_dp_name(dp), error);
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stats_counter = &stats->n_hit;
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out:
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/* Update datapath statistics. */
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u64_stats_update_begin(&stats->syncp);
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(*stats_counter)++;
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stats->n_mask_hit += n_mask_hit;
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u64_stats_update_end(&stats->syncp);
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}
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int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
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const struct sw_flow_key *key,
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const struct dp_upcall_info *upcall_info,
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uint32_t cutlen)
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{
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struct dp_stats_percpu *stats;
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int err;
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if (upcall_info->portid == 0) {
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err = -ENOTCONN;
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goto err;
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}
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if (!skb_is_gso(skb))
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err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
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else
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err = queue_gso_packets(dp, skb, key, upcall_info, cutlen);
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if (err)
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goto err;
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return 0;
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err:
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stats = this_cpu_ptr(dp->stats_percpu);
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u64_stats_update_begin(&stats->syncp);
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stats->n_lost++;
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u64_stats_update_end(&stats->syncp);
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return err;
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}
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static int queue_gso_packets(struct datapath *dp, struct sk_buff *skb,
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const struct sw_flow_key *key,
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const struct dp_upcall_info *upcall_info,
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uint32_t cutlen)
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{
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unsigned int gso_type = skb_shinfo(skb)->gso_type;
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struct sw_flow_key later_key;
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struct sk_buff *segs, *nskb;
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int err;
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BUILD_BUG_ON(sizeof(*OVS_CB(skb)) > SKB_GSO_CB_OFFSET);
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segs = __skb_gso_segment(skb, NETIF_F_SG, false);
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if (IS_ERR(segs))
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return PTR_ERR(segs);
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if (segs == NULL)
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return -EINVAL;
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|
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if (gso_type & SKB_GSO_UDP) {
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/* The initial flow key extracted by ovs_flow_key_extract()
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* in this case is for a first fragment, so we need to
|
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* properly mark later fragments.
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*/
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later_key = *key;
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later_key.ip.frag = OVS_FRAG_TYPE_LATER;
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}
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|
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/* Queue all of the segments. */
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skb_list_walk_safe(segs, skb, nskb) {
|
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if (gso_type & SKB_GSO_UDP && skb != segs)
|
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key = &later_key;
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|
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err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
|
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if (err)
|
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break;
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|
|
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}
|
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|
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/* Free all of the segments. */
|
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skb_list_walk_safe(segs, skb, nskb) {
|
|
if (err)
|
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kfree_skb(skb);
|
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else
|
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consume_skb(skb);
|
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}
|
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return err;
|
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}
|
|
|
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static size_t upcall_msg_size(const struct dp_upcall_info *upcall_info,
|
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unsigned int hdrlen, int actions_attrlen)
|
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{
|
|
size_t size = NLMSG_ALIGN(sizeof(struct ovs_header))
|
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+ nla_total_size(hdrlen) /* OVS_PACKET_ATTR_PACKET */
|
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+ nla_total_size(ovs_key_attr_size()) /* OVS_PACKET_ATTR_KEY */
|
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+ nla_total_size(sizeof(unsigned int)) /* OVS_PACKET_ATTR_LEN */
|
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+ nla_total_size(sizeof(u64)); /* OVS_PACKET_ATTR_HASH */
|
|
|
|
/* OVS_PACKET_ATTR_USERDATA */
|
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if (upcall_info->userdata)
|
|
size += NLA_ALIGN(upcall_info->userdata->nla_len);
|
|
|
|
/* OVS_PACKET_ATTR_EGRESS_TUN_KEY */
|
|
if (upcall_info->egress_tun_info)
|
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size += nla_total_size(ovs_tun_key_attr_size());
|
|
|
|
/* OVS_PACKET_ATTR_ACTIONS */
|
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if (upcall_info->actions_len)
|
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size += nla_total_size(actions_attrlen);
|
|
|
|
/* OVS_PACKET_ATTR_MRU */
|
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if (upcall_info->mru)
|
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size += nla_total_size(sizeof(upcall_info->mru));
|
|
|
|
return size;
|
|
}
|
|
|
|
static void pad_packet(struct datapath *dp, struct sk_buff *skb)
|
|
{
|
|
if (!(dp->user_features & OVS_DP_F_UNALIGNED)) {
|
|
size_t plen = NLA_ALIGN(skb->len) - skb->len;
|
|
|
|
if (plen > 0)
|
|
skb_put_zero(skb, plen);
|
|
}
|
|
}
|
|
|
|
static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
|
|
const struct sw_flow_key *key,
|
|
const struct dp_upcall_info *upcall_info,
|
|
uint32_t cutlen)
|
|
{
|
|
struct ovs_header *upcall;
|
|
struct sk_buff *nskb = NULL;
|
|
struct sk_buff *user_skb = NULL; /* to be queued to userspace */
|
|
struct nlattr *nla;
|
|
size_t len;
|
|
unsigned int hlen;
|
|
int err, dp_ifindex;
|
|
u64 hash;
|
|
|
|
dp_ifindex = get_dpifindex(dp);
|
|
if (!dp_ifindex)
|
|
return -ENODEV;
|
|
|
|
if (skb_vlan_tag_present(skb)) {
|
|
nskb = skb_clone(skb, GFP_ATOMIC);
|
|
if (!nskb)
|
|
return -ENOMEM;
|
|
|
|
nskb = __vlan_hwaccel_push_inside(nskb);
|
|
if (!nskb)
|
|
return -ENOMEM;
|
|
|
|
skb = nskb;
|
|
}
|
|
|
|
if (nla_attr_size(skb->len) > USHRT_MAX) {
|
|
err = -EFBIG;
|
|
goto out;
|
|
}
|
|
|
|
/* Complete checksum if needed */
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL &&
|
|
(err = skb_csum_hwoffload_help(skb, 0)))
|
|
goto out;
|
|
|
|
/* Older versions of OVS user space enforce alignment of the last
|
|
* Netlink attribute to NLA_ALIGNTO which would require extensive
|
|
* padding logic. Only perform zerocopy if padding is not required.
|
|
*/
|
|
if (dp->user_features & OVS_DP_F_UNALIGNED)
|
|
hlen = skb_zerocopy_headlen(skb);
|
|
else
|
|
hlen = skb->len;
|
|
|
|
len = upcall_msg_size(upcall_info, hlen - cutlen,
|
|
OVS_CB(skb)->acts_origlen);
|
|
user_skb = genlmsg_new(len, GFP_ATOMIC);
|
|
if (!user_skb) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
|
|
0, upcall_info->cmd);
|
|
if (!upcall) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
upcall->dp_ifindex = dp_ifindex;
|
|
|
|
err = ovs_nla_put_key(key, key, OVS_PACKET_ATTR_KEY, false, user_skb);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (upcall_info->userdata)
|
|
__nla_put(user_skb, OVS_PACKET_ATTR_USERDATA,
|
|
nla_len(upcall_info->userdata),
|
|
nla_data(upcall_info->userdata));
|
|
|
|
if (upcall_info->egress_tun_info) {
|
|
nla = nla_nest_start_noflag(user_skb,
|
|
OVS_PACKET_ATTR_EGRESS_TUN_KEY);
|
|
if (!nla) {
|
|
err = -EMSGSIZE;
|
|
goto out;
|
|
}
|
|
err = ovs_nla_put_tunnel_info(user_skb,
|
|
upcall_info->egress_tun_info);
|
|
if (err)
|
|
goto out;
|
|
|
|
nla_nest_end(user_skb, nla);
|
|
}
|
|
|
|
if (upcall_info->actions_len) {
|
|
nla = nla_nest_start_noflag(user_skb, OVS_PACKET_ATTR_ACTIONS);
|
|
if (!nla) {
|
|
err = -EMSGSIZE;
|
|
goto out;
|
|
}
|
|
err = ovs_nla_put_actions(upcall_info->actions,
|
|
upcall_info->actions_len,
|
|
user_skb);
|
|
if (!err)
|
|
nla_nest_end(user_skb, nla);
|
|
else
|
|
nla_nest_cancel(user_skb, nla);
|
|
}
|
|
|
|
/* Add OVS_PACKET_ATTR_MRU */
|
|
if (upcall_info->mru &&
|
|
nla_put_u16(user_skb, OVS_PACKET_ATTR_MRU, upcall_info->mru)) {
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
/* Add OVS_PACKET_ATTR_LEN when packet is truncated */
|
|
if (cutlen > 0 &&
|
|
nla_put_u32(user_skb, OVS_PACKET_ATTR_LEN, skb->len)) {
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
/* Add OVS_PACKET_ATTR_HASH */
|
|
hash = skb_get_hash_raw(skb);
|
|
if (skb->sw_hash)
|
|
hash |= OVS_PACKET_HASH_SW_BIT;
|
|
|
|
if (skb->l4_hash)
|
|
hash |= OVS_PACKET_HASH_L4_BIT;
|
|
|
|
if (nla_put(user_skb, OVS_PACKET_ATTR_HASH, sizeof (u64), &hash)) {
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
|
|
/* Only reserve room for attribute header, packet data is added
|
|
* in skb_zerocopy() */
|
|
if (!(nla = nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, 0))) {
|
|
err = -ENOBUFS;
|
|
goto out;
|
|
}
|
|
nla->nla_len = nla_attr_size(skb->len - cutlen);
|
|
|
|
err = skb_zerocopy(user_skb, skb, skb->len - cutlen, hlen);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Pad OVS_PACKET_ATTR_PACKET if linear copy was performed */
|
|
pad_packet(dp, user_skb);
|
|
|
|
((struct nlmsghdr *) user_skb->data)->nlmsg_len = user_skb->len;
|
|
|
|
err = genlmsg_unicast(ovs_dp_get_net(dp), user_skb, upcall_info->portid);
|
|
user_skb = NULL;
|
|
out:
|
|
if (err)
|
|
skb_tx_error(skb);
|
|
kfree_skb(user_skb);
|
|
kfree_skb(nskb);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct net *net = sock_net(skb->sk);
|
|
struct nlattr **a = info->attrs;
|
|
struct sw_flow_actions *acts;
|
|
struct sk_buff *packet;
|
|
struct sw_flow *flow;
|
|
struct sw_flow_actions *sf_acts;
|
|
struct datapath *dp;
|
|
struct vport *input_vport;
|
|
u16 mru = 0;
|
|
u64 hash;
|
|
int len;
|
|
int err;
|
|
bool log = !a[OVS_PACKET_ATTR_PROBE];
|
|
|
|
err = -EINVAL;
|
|
if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
|
|
!a[OVS_PACKET_ATTR_ACTIONS])
|
|
goto err;
|
|
|
|
len = nla_len(a[OVS_PACKET_ATTR_PACKET]);
|
|
packet = __dev_alloc_skb(NET_IP_ALIGN + len, GFP_KERNEL);
|
|
err = -ENOMEM;
|
|
if (!packet)
|
|
goto err;
|
|
skb_reserve(packet, NET_IP_ALIGN);
|
|
|
|
nla_memcpy(__skb_put(packet, len), a[OVS_PACKET_ATTR_PACKET], len);
|
|
|
|
/* Set packet's mru */
|
|
if (a[OVS_PACKET_ATTR_MRU]) {
|
|
mru = nla_get_u16(a[OVS_PACKET_ATTR_MRU]);
|
|
packet->ignore_df = 1;
|
|
}
|
|
OVS_CB(packet)->mru = mru;
|
|
|
|
if (a[OVS_PACKET_ATTR_HASH]) {
|
|
hash = nla_get_u64(a[OVS_PACKET_ATTR_HASH]);
|
|
|
|
__skb_set_hash(packet, hash & 0xFFFFFFFFULL,
|
|
!!(hash & OVS_PACKET_HASH_SW_BIT),
|
|
!!(hash & OVS_PACKET_HASH_L4_BIT));
|
|
}
|
|
|
|
/* Build an sw_flow for sending this packet. */
|
|
flow = ovs_flow_alloc();
|
|
err = PTR_ERR(flow);
|
|
if (IS_ERR(flow))
|
|
goto err_kfree_skb;
|
|
|
|
err = ovs_flow_key_extract_userspace(net, a[OVS_PACKET_ATTR_KEY],
|
|
packet, &flow->key, log);
|
|
if (err)
|
|
goto err_flow_free;
|
|
|
|
err = ovs_nla_copy_actions(net, a[OVS_PACKET_ATTR_ACTIONS],
|
|
&flow->key, &acts, log);
|
|
if (err)
|
|
goto err_flow_free;
|
|
|
|
rcu_assign_pointer(flow->sf_acts, acts);
|
|
packet->priority = flow->key.phy.priority;
|
|
packet->mark = flow->key.phy.skb_mark;
|
|
|
|
rcu_read_lock();
|
|
dp = get_dp_rcu(net, ovs_header->dp_ifindex);
|
|
err = -ENODEV;
|
|
if (!dp)
|
|
goto err_unlock;
|
|
|
|
input_vport = ovs_vport_rcu(dp, flow->key.phy.in_port);
|
|
if (!input_vport)
|
|
input_vport = ovs_vport_rcu(dp, OVSP_LOCAL);
|
|
|
|
if (!input_vport)
|
|
goto err_unlock;
|
|
|
|
packet->dev = input_vport->dev;
|
|
OVS_CB(packet)->input_vport = input_vport;
|
|
sf_acts = rcu_dereference(flow->sf_acts);
|
|
|
|
local_bh_disable();
|
|
err = ovs_execute_actions(dp, packet, sf_acts, &flow->key);
|
|
local_bh_enable();
|
|
rcu_read_unlock();
|
|
|
|
ovs_flow_free(flow, false);
|
|
return err;
|
|
|
|
err_unlock:
|
|
rcu_read_unlock();
|
|
err_flow_free:
|
|
ovs_flow_free(flow, false);
|
|
err_kfree_skb:
|
|
kfree_skb(packet);
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static const struct nla_policy packet_policy[OVS_PACKET_ATTR_MAX + 1] = {
|
|
[OVS_PACKET_ATTR_PACKET] = { .len = ETH_HLEN },
|
|
[OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
|
|
[OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
|
|
[OVS_PACKET_ATTR_PROBE] = { .type = NLA_FLAG },
|
|
[OVS_PACKET_ATTR_MRU] = { .type = NLA_U16 },
|
|
[OVS_PACKET_ATTR_HASH] = { .type = NLA_U64 },
|
|
};
|
|
|
|
static const struct genl_ops dp_packet_genl_ops[] = {
|
|
{ .cmd = OVS_PACKET_CMD_EXECUTE,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_packet_cmd_execute
|
|
}
|
|
};
|
|
|
|
static struct genl_family dp_packet_genl_family __ro_after_init = {
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
.name = OVS_PACKET_FAMILY,
|
|
.version = OVS_PACKET_VERSION,
|
|
.maxattr = OVS_PACKET_ATTR_MAX,
|
|
.policy = packet_policy,
|
|
.netnsok = true,
|
|
.parallel_ops = true,
|
|
.ops = dp_packet_genl_ops,
|
|
.n_ops = ARRAY_SIZE(dp_packet_genl_ops),
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
static void get_dp_stats(const struct datapath *dp, struct ovs_dp_stats *stats,
|
|
struct ovs_dp_megaflow_stats *mega_stats)
|
|
{
|
|
int i;
|
|
|
|
memset(mega_stats, 0, sizeof(*mega_stats));
|
|
|
|
stats->n_flows = ovs_flow_tbl_count(&dp->table);
|
|
mega_stats->n_masks = ovs_flow_tbl_num_masks(&dp->table);
|
|
|
|
stats->n_hit = stats->n_missed = stats->n_lost = 0;
|
|
|
|
for_each_possible_cpu(i) {
|
|
const struct dp_stats_percpu *percpu_stats;
|
|
struct dp_stats_percpu local_stats;
|
|
unsigned int start;
|
|
|
|
percpu_stats = per_cpu_ptr(dp->stats_percpu, i);
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
|
|
local_stats = *percpu_stats;
|
|
} while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
|
|
|
|
stats->n_hit += local_stats.n_hit;
|
|
stats->n_missed += local_stats.n_missed;
|
|
stats->n_lost += local_stats.n_lost;
|
|
mega_stats->n_mask_hit += local_stats.n_mask_hit;
|
|
}
|
|
}
|
|
|
|
static bool should_fill_key(const struct sw_flow_id *sfid, uint32_t ufid_flags)
|
|
{
|
|
return ovs_identifier_is_ufid(sfid) &&
|
|
!(ufid_flags & OVS_UFID_F_OMIT_KEY);
|
|
}
|
|
|
|
static bool should_fill_mask(uint32_t ufid_flags)
|
|
{
|
|
return !(ufid_flags & OVS_UFID_F_OMIT_MASK);
|
|
}
|
|
|
|
static bool should_fill_actions(uint32_t ufid_flags)
|
|
{
|
|
return !(ufid_flags & OVS_UFID_F_OMIT_ACTIONS);
|
|
}
|
|
|
|
static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts,
|
|
const struct sw_flow_id *sfid,
|
|
uint32_t ufid_flags)
|
|
{
|
|
size_t len = NLMSG_ALIGN(sizeof(struct ovs_header));
|
|
|
|
/* OVS_FLOW_ATTR_UFID, or unmasked flow key as fallback
|
|
* see ovs_nla_put_identifier()
|
|
*/
|
|
if (sfid && ovs_identifier_is_ufid(sfid))
|
|
len += nla_total_size(sfid->ufid_len);
|
|
else
|
|
len += nla_total_size(ovs_key_attr_size());
|
|
|
|
/* OVS_FLOW_ATTR_KEY */
|
|
if (!sfid || should_fill_key(sfid, ufid_flags))
|
|
len += nla_total_size(ovs_key_attr_size());
|
|
|
|
/* OVS_FLOW_ATTR_MASK */
|
|
if (should_fill_mask(ufid_flags))
|
|
len += nla_total_size(ovs_key_attr_size());
|
|
|
|
/* OVS_FLOW_ATTR_ACTIONS */
|
|
if (should_fill_actions(ufid_flags))
|
|
len += nla_total_size(acts->orig_len);
|
|
|
|
return len
|
|
+ nla_total_size_64bit(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */
|
|
+ nla_total_size(1) /* OVS_FLOW_ATTR_TCP_FLAGS */
|
|
+ nla_total_size_64bit(8); /* OVS_FLOW_ATTR_USED */
|
|
}
|
|
|
|
/* Called with ovs_mutex or RCU read lock. */
|
|
static int ovs_flow_cmd_fill_stats(const struct sw_flow *flow,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ovs_flow_stats stats;
|
|
__be16 tcp_flags;
|
|
unsigned long used;
|
|
|
|
ovs_flow_stats_get(flow, &stats, &used, &tcp_flags);
|
|
|
|
if (used &&
|
|
nla_put_u64_64bit(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used),
|
|
OVS_FLOW_ATTR_PAD))
|
|
return -EMSGSIZE;
|
|
|
|
if (stats.n_packets &&
|
|
nla_put_64bit(skb, OVS_FLOW_ATTR_STATS,
|
|
sizeof(struct ovs_flow_stats), &stats,
|
|
OVS_FLOW_ATTR_PAD))
|
|
return -EMSGSIZE;
|
|
|
|
if ((u8)ntohs(tcp_flags) &&
|
|
nla_put_u8(skb, OVS_FLOW_ATTR_TCP_FLAGS, (u8)ntohs(tcp_flags)))
|
|
return -EMSGSIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called with ovs_mutex or RCU read lock. */
|
|
static int ovs_flow_cmd_fill_actions(const struct sw_flow *flow,
|
|
struct sk_buff *skb, int skb_orig_len)
|
|
{
|
|
struct nlattr *start;
|
|
int err;
|
|
|
|
/* If OVS_FLOW_ATTR_ACTIONS doesn't fit, skip dumping the actions if
|
|
* this is the first flow to be dumped into 'skb'. This is unusual for
|
|
* Netlink but individual action lists can be longer than
|
|
* NLMSG_GOODSIZE and thus entirely undumpable if we didn't do this.
|
|
* The userspace caller can always fetch the actions separately if it
|
|
* really wants them. (Most userspace callers in fact don't care.)
|
|
*
|
|
* This can only fail for dump operations because the skb is always
|
|
* properly sized for single flows.
|
|
*/
|
|
start = nla_nest_start_noflag(skb, OVS_FLOW_ATTR_ACTIONS);
|
|
if (start) {
|
|
const struct sw_flow_actions *sf_acts;
|
|
|
|
sf_acts = rcu_dereference_ovsl(flow->sf_acts);
|
|
err = ovs_nla_put_actions(sf_acts->actions,
|
|
sf_acts->actions_len, skb);
|
|
|
|
if (!err)
|
|
nla_nest_end(skb, start);
|
|
else {
|
|
if (skb_orig_len)
|
|
return err;
|
|
|
|
nla_nest_cancel(skb, start);
|
|
}
|
|
} else if (skb_orig_len) {
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called with ovs_mutex or RCU read lock. */
|
|
static int ovs_flow_cmd_fill_info(const struct sw_flow *flow, int dp_ifindex,
|
|
struct sk_buff *skb, u32 portid,
|
|
u32 seq, u32 flags, u8 cmd, u32 ufid_flags)
|
|
{
|
|
const int skb_orig_len = skb->len;
|
|
struct ovs_header *ovs_header;
|
|
int err;
|
|
|
|
ovs_header = genlmsg_put(skb, portid, seq, &dp_flow_genl_family,
|
|
flags, cmd);
|
|
if (!ovs_header)
|
|
return -EMSGSIZE;
|
|
|
|
ovs_header->dp_ifindex = dp_ifindex;
|
|
|
|
err = ovs_nla_put_identifier(flow, skb);
|
|
if (err)
|
|
goto error;
|
|
|
|
if (should_fill_key(&flow->id, ufid_flags)) {
|
|
err = ovs_nla_put_masked_key(flow, skb);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
if (should_fill_mask(ufid_flags)) {
|
|
err = ovs_nla_put_mask(flow, skb);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
err = ovs_flow_cmd_fill_stats(flow, skb);
|
|
if (err)
|
|
goto error;
|
|
|
|
if (should_fill_actions(ufid_flags)) {
|
|
err = ovs_flow_cmd_fill_actions(flow, skb, skb_orig_len);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
genlmsg_end(skb, ovs_header);
|
|
return 0;
|
|
|
|
error:
|
|
genlmsg_cancel(skb, ovs_header);
|
|
return err;
|
|
}
|
|
|
|
/* May not be called with RCU read lock. */
|
|
static struct sk_buff *ovs_flow_cmd_alloc_info(const struct sw_flow_actions *acts,
|
|
const struct sw_flow_id *sfid,
|
|
struct genl_info *info,
|
|
bool always,
|
|
uint32_t ufid_flags)
|
|
{
|
|
struct sk_buff *skb;
|
|
size_t len;
|
|
|
|
if (!always && !ovs_must_notify(&dp_flow_genl_family, info, 0))
|
|
return NULL;
|
|
|
|
len = ovs_flow_cmd_msg_size(acts, sfid, ufid_flags);
|
|
skb = genlmsg_new(len, GFP_KERNEL);
|
|
if (!skb)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return skb;
|
|
}
|
|
|
|
/* Called with ovs_mutex. */
|
|
static struct sk_buff *ovs_flow_cmd_build_info(const struct sw_flow *flow,
|
|
int dp_ifindex,
|
|
struct genl_info *info, u8 cmd,
|
|
bool always, u32 ufid_flags)
|
|
{
|
|
struct sk_buff *skb;
|
|
int retval;
|
|
|
|
skb = ovs_flow_cmd_alloc_info(ovsl_dereference(flow->sf_acts),
|
|
&flow->id, info, always, ufid_flags);
|
|
if (IS_ERR_OR_NULL(skb))
|
|
return skb;
|
|
|
|
retval = ovs_flow_cmd_fill_info(flow, dp_ifindex, skb,
|
|
info->snd_portid, info->snd_seq, 0,
|
|
cmd, ufid_flags);
|
|
if (WARN_ON_ONCE(retval < 0)) {
|
|
kfree_skb(skb);
|
|
skb = ERR_PTR(retval);
|
|
}
|
|
return skb;
|
|
}
|
|
|
|
static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct sw_flow *flow = NULL, *new_flow;
|
|
struct sw_flow_mask mask;
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
struct sw_flow_actions *acts;
|
|
struct sw_flow_match match;
|
|
u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
|
|
int error;
|
|
bool log = !a[OVS_FLOW_ATTR_PROBE];
|
|
|
|
/* Must have key and actions. */
|
|
error = -EINVAL;
|
|
if (!a[OVS_FLOW_ATTR_KEY]) {
|
|
OVS_NLERR(log, "Flow key attr not present in new flow.");
|
|
goto error;
|
|
}
|
|
if (!a[OVS_FLOW_ATTR_ACTIONS]) {
|
|
OVS_NLERR(log, "Flow actions attr not present in new flow.");
|
|
goto error;
|
|
}
|
|
|
|
/* Most of the time we need to allocate a new flow, do it before
|
|
* locking.
|
|
*/
|
|
new_flow = ovs_flow_alloc();
|
|
if (IS_ERR(new_flow)) {
|
|
error = PTR_ERR(new_flow);
|
|
goto error;
|
|
}
|
|
|
|
/* Extract key. */
|
|
ovs_match_init(&match, &new_flow->key, false, &mask);
|
|
error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
|
|
a[OVS_FLOW_ATTR_MASK], log);
|
|
if (error)
|
|
goto err_kfree_flow;
|
|
|
|
/* Extract flow identifier. */
|
|
error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID],
|
|
&new_flow->key, log);
|
|
if (error)
|
|
goto err_kfree_flow;
|
|
|
|
/* unmasked key is needed to match when ufid is not used. */
|
|
if (ovs_identifier_is_key(&new_flow->id))
|
|
match.key = new_flow->id.unmasked_key;
|
|
|
|
ovs_flow_mask_key(&new_flow->key, &new_flow->key, true, &mask);
|
|
|
|
/* Validate actions. */
|
|
error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS],
|
|
&new_flow->key, &acts, log);
|
|
if (error) {
|
|
OVS_NLERR(log, "Flow actions may not be safe on all matching packets.");
|
|
goto err_kfree_flow;
|
|
}
|
|
|
|
reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false,
|
|
ufid_flags);
|
|
if (IS_ERR(reply)) {
|
|
error = PTR_ERR(reply);
|
|
goto err_kfree_acts;
|
|
}
|
|
|
|
ovs_lock();
|
|
dp = get_dp(net, ovs_header->dp_ifindex);
|
|
if (unlikely(!dp)) {
|
|
error = -ENODEV;
|
|
goto err_unlock_ovs;
|
|
}
|
|
|
|
/* Check if this is a duplicate flow */
|
|
if (ovs_identifier_is_ufid(&new_flow->id))
|
|
flow = ovs_flow_tbl_lookup_ufid(&dp->table, &new_flow->id);
|
|
if (!flow)
|
|
flow = ovs_flow_tbl_lookup(&dp->table, &new_flow->key);
|
|
if (likely(!flow)) {
|
|
rcu_assign_pointer(new_flow->sf_acts, acts);
|
|
|
|
/* Put flow in bucket. */
|
|
error = ovs_flow_tbl_insert(&dp->table, new_flow, &mask);
|
|
if (unlikely(error)) {
|
|
acts = NULL;
|
|
goto err_unlock_ovs;
|
|
}
|
|
|
|
if (unlikely(reply)) {
|
|
error = ovs_flow_cmd_fill_info(new_flow,
|
|
ovs_header->dp_ifindex,
|
|
reply, info->snd_portid,
|
|
info->snd_seq, 0,
|
|
OVS_FLOW_CMD_NEW,
|
|
ufid_flags);
|
|
BUG_ON(error < 0);
|
|
}
|
|
ovs_unlock();
|
|
} else {
|
|
struct sw_flow_actions *old_acts;
|
|
|
|
/* Bail out if we're not allowed to modify an existing flow.
|
|
* We accept NLM_F_CREATE in place of the intended NLM_F_EXCL
|
|
* because Generic Netlink treats the latter as a dump
|
|
* request. We also accept NLM_F_EXCL in case that bug ever
|
|
* gets fixed.
|
|
*/
|
|
if (unlikely(info->nlhdr->nlmsg_flags & (NLM_F_CREATE
|
|
| NLM_F_EXCL))) {
|
|
error = -EEXIST;
|
|
goto err_unlock_ovs;
|
|
}
|
|
/* The flow identifier has to be the same for flow updates.
|
|
* Look for any overlapping flow.
|
|
*/
|
|
if (unlikely(!ovs_flow_cmp(flow, &match))) {
|
|
if (ovs_identifier_is_key(&flow->id))
|
|
flow = ovs_flow_tbl_lookup_exact(&dp->table,
|
|
&match);
|
|
else /* UFID matches but key is different */
|
|
flow = NULL;
|
|
if (!flow) {
|
|
error = -ENOENT;
|
|
goto err_unlock_ovs;
|
|
}
|
|
}
|
|
/* Update actions. */
|
|
old_acts = ovsl_dereference(flow->sf_acts);
|
|
rcu_assign_pointer(flow->sf_acts, acts);
|
|
|
|
if (unlikely(reply)) {
|
|
error = ovs_flow_cmd_fill_info(flow,
|
|
ovs_header->dp_ifindex,
|
|
reply, info->snd_portid,
|
|
info->snd_seq, 0,
|
|
OVS_FLOW_CMD_NEW,
|
|
ufid_flags);
|
|
BUG_ON(error < 0);
|
|
}
|
|
ovs_unlock();
|
|
|
|
ovs_nla_free_flow_actions_rcu(old_acts);
|
|
ovs_flow_free(new_flow, false);
|
|
}
|
|
|
|
if (reply)
|
|
ovs_notify(&dp_flow_genl_family, reply, info);
|
|
return 0;
|
|
|
|
err_unlock_ovs:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
err_kfree_acts:
|
|
ovs_nla_free_flow_actions(acts);
|
|
err_kfree_flow:
|
|
ovs_flow_free(new_flow, false);
|
|
error:
|
|
return error;
|
|
}
|
|
|
|
/* Factor out action copy to avoid "Wframe-larger-than=1024" warning. */
|
|
static noinline_for_stack struct sw_flow_actions *get_flow_actions(struct net *net,
|
|
const struct nlattr *a,
|
|
const struct sw_flow_key *key,
|
|
const struct sw_flow_mask *mask,
|
|
bool log)
|
|
{
|
|
struct sw_flow_actions *acts;
|
|
struct sw_flow_key masked_key;
|
|
int error;
|
|
|
|
ovs_flow_mask_key(&masked_key, key, true, mask);
|
|
error = ovs_nla_copy_actions(net, a, &masked_key, &acts, log);
|
|
if (error) {
|
|
OVS_NLERR(log,
|
|
"Actions may not be safe on all matching packets");
|
|
return ERR_PTR(error);
|
|
}
|
|
|
|
return acts;
|
|
}
|
|
|
|
/* Factor out match-init and action-copy to avoid
|
|
* "Wframe-larger-than=1024" warning. Because mask is only
|
|
* used to get actions, we new a function to save some
|
|
* stack space.
|
|
*
|
|
* If there are not key and action attrs, we return 0
|
|
* directly. In the case, the caller will also not use the
|
|
* match as before. If there is action attr, we try to get
|
|
* actions and save them to *acts. Before returning from
|
|
* the function, we reset the match->mask pointer. Because
|
|
* we should not to return match object with dangling reference
|
|
* to mask.
|
|
* */
|
|
static noinline_for_stack int
|
|
ovs_nla_init_match_and_action(struct net *net,
|
|
struct sw_flow_match *match,
|
|
struct sw_flow_key *key,
|
|
struct nlattr **a,
|
|
struct sw_flow_actions **acts,
|
|
bool log)
|
|
{
|
|
struct sw_flow_mask mask;
|
|
int error = 0;
|
|
|
|
if (a[OVS_FLOW_ATTR_KEY]) {
|
|
ovs_match_init(match, key, true, &mask);
|
|
error = ovs_nla_get_match(net, match, a[OVS_FLOW_ATTR_KEY],
|
|
a[OVS_FLOW_ATTR_MASK], log);
|
|
if (error)
|
|
goto error;
|
|
}
|
|
|
|
if (a[OVS_FLOW_ATTR_ACTIONS]) {
|
|
if (!a[OVS_FLOW_ATTR_KEY]) {
|
|
OVS_NLERR(log,
|
|
"Flow key attribute not present in set flow.");
|
|
error = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
*acts = get_flow_actions(net, a[OVS_FLOW_ATTR_ACTIONS], key,
|
|
&mask, log);
|
|
if (IS_ERR(*acts)) {
|
|
error = PTR_ERR(*acts);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
/* On success, error is 0. */
|
|
error:
|
|
match->mask = NULL;
|
|
return error;
|
|
}
|
|
|
|
static int ovs_flow_cmd_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct sw_flow_key key;
|
|
struct sw_flow *flow;
|
|
struct sk_buff *reply = NULL;
|
|
struct datapath *dp;
|
|
struct sw_flow_actions *old_acts = NULL, *acts = NULL;
|
|
struct sw_flow_match match;
|
|
struct sw_flow_id sfid;
|
|
u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
|
|
int error = 0;
|
|
bool log = !a[OVS_FLOW_ATTR_PROBE];
|
|
bool ufid_present;
|
|
|
|
ufid_present = ovs_nla_get_ufid(&sfid, a[OVS_FLOW_ATTR_UFID], log);
|
|
if (!a[OVS_FLOW_ATTR_KEY] && !ufid_present) {
|
|
OVS_NLERR(log,
|
|
"Flow set message rejected, Key attribute missing.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = ovs_nla_init_match_and_action(net, &match, &key, a,
|
|
&acts, log);
|
|
if (error)
|
|
goto error;
|
|
|
|
if (acts) {
|
|
/* Can allocate before locking if have acts. */
|
|
reply = ovs_flow_cmd_alloc_info(acts, &sfid, info, false,
|
|
ufid_flags);
|
|
if (IS_ERR(reply)) {
|
|
error = PTR_ERR(reply);
|
|
goto err_kfree_acts;
|
|
}
|
|
}
|
|
|
|
ovs_lock();
|
|
dp = get_dp(net, ovs_header->dp_ifindex);
|
|
if (unlikely(!dp)) {
|
|
error = -ENODEV;
|
|
goto err_unlock_ovs;
|
|
}
|
|
/* Check that the flow exists. */
|
|
if (ufid_present)
|
|
flow = ovs_flow_tbl_lookup_ufid(&dp->table, &sfid);
|
|
else
|
|
flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
|
|
if (unlikely(!flow)) {
|
|
error = -ENOENT;
|
|
goto err_unlock_ovs;
|
|
}
|
|
|
|
/* Update actions, if present. */
|
|
if (likely(acts)) {
|
|
old_acts = ovsl_dereference(flow->sf_acts);
|
|
rcu_assign_pointer(flow->sf_acts, acts);
|
|
|
|
if (unlikely(reply)) {
|
|
error = ovs_flow_cmd_fill_info(flow,
|
|
ovs_header->dp_ifindex,
|
|
reply, info->snd_portid,
|
|
info->snd_seq, 0,
|
|
OVS_FLOW_CMD_SET,
|
|
ufid_flags);
|
|
BUG_ON(error < 0);
|
|
}
|
|
} else {
|
|
/* Could not alloc without acts before locking. */
|
|
reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex,
|
|
info, OVS_FLOW_CMD_SET, false,
|
|
ufid_flags);
|
|
|
|
if (IS_ERR(reply)) {
|
|
error = PTR_ERR(reply);
|
|
goto err_unlock_ovs;
|
|
}
|
|
}
|
|
|
|
/* Clear stats. */
|
|
if (a[OVS_FLOW_ATTR_CLEAR])
|
|
ovs_flow_stats_clear(flow);
|
|
ovs_unlock();
|
|
|
|
if (reply)
|
|
ovs_notify(&dp_flow_genl_family, reply, info);
|
|
if (old_acts)
|
|
ovs_nla_free_flow_actions_rcu(old_acts);
|
|
|
|
return 0;
|
|
|
|
err_unlock_ovs:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
err_kfree_acts:
|
|
ovs_nla_free_flow_actions(acts);
|
|
error:
|
|
return error;
|
|
}
|
|
|
|
static int ovs_flow_cmd_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct net *net = sock_net(skb->sk);
|
|
struct sw_flow_key key;
|
|
struct sk_buff *reply;
|
|
struct sw_flow *flow;
|
|
struct datapath *dp;
|
|
struct sw_flow_match match;
|
|
struct sw_flow_id ufid;
|
|
u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
|
|
int err = 0;
|
|
bool log = !a[OVS_FLOW_ATTR_PROBE];
|
|
bool ufid_present;
|
|
|
|
ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
|
|
if (a[OVS_FLOW_ATTR_KEY]) {
|
|
ovs_match_init(&match, &key, true, NULL);
|
|
err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY], NULL,
|
|
log);
|
|
} else if (!ufid_present) {
|
|
OVS_NLERR(log,
|
|
"Flow get message rejected, Key attribute missing.");
|
|
err = -EINVAL;
|
|
}
|
|
if (err)
|
|
return err;
|
|
|
|
ovs_lock();
|
|
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
|
|
if (!dp) {
|
|
err = -ENODEV;
|
|
goto unlock;
|
|
}
|
|
|
|
if (ufid_present)
|
|
flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
|
|
else
|
|
flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
|
|
if (!flow) {
|
|
err = -ENOENT;
|
|
goto unlock;
|
|
}
|
|
|
|
reply = ovs_flow_cmd_build_info(flow, ovs_header->dp_ifindex, info,
|
|
OVS_FLOW_CMD_GET, true, ufid_flags);
|
|
if (IS_ERR(reply)) {
|
|
err = PTR_ERR(reply);
|
|
goto unlock;
|
|
}
|
|
|
|
ovs_unlock();
|
|
return genlmsg_reply(reply, info);
|
|
unlock:
|
|
ovs_unlock();
|
|
return err;
|
|
}
|
|
|
|
static int ovs_flow_cmd_del(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct net *net = sock_net(skb->sk);
|
|
struct sw_flow_key key;
|
|
struct sk_buff *reply;
|
|
struct sw_flow *flow = NULL;
|
|
struct datapath *dp;
|
|
struct sw_flow_match match;
|
|
struct sw_flow_id ufid;
|
|
u32 ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
|
|
int err;
|
|
bool log = !a[OVS_FLOW_ATTR_PROBE];
|
|
bool ufid_present;
|
|
|
|
ufid_present = ovs_nla_get_ufid(&ufid, a[OVS_FLOW_ATTR_UFID], log);
|
|
if (a[OVS_FLOW_ATTR_KEY]) {
|
|
ovs_match_init(&match, &key, true, NULL);
|
|
err = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
|
|
NULL, log);
|
|
if (unlikely(err))
|
|
return err;
|
|
}
|
|
|
|
ovs_lock();
|
|
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
|
|
if (unlikely(!dp)) {
|
|
err = -ENODEV;
|
|
goto unlock;
|
|
}
|
|
|
|
if (unlikely(!a[OVS_FLOW_ATTR_KEY] && !ufid_present)) {
|
|
err = ovs_flow_tbl_flush(&dp->table);
|
|
goto unlock;
|
|
}
|
|
|
|
if (ufid_present)
|
|
flow = ovs_flow_tbl_lookup_ufid(&dp->table, &ufid);
|
|
else
|
|
flow = ovs_flow_tbl_lookup_exact(&dp->table, &match);
|
|
if (unlikely(!flow)) {
|
|
err = -ENOENT;
|
|
goto unlock;
|
|
}
|
|
|
|
ovs_flow_tbl_remove(&dp->table, flow);
|
|
ovs_unlock();
|
|
|
|
reply = ovs_flow_cmd_alloc_info((const struct sw_flow_actions __force *) flow->sf_acts,
|
|
&flow->id, info, false, ufid_flags);
|
|
if (likely(reply)) {
|
|
if (!IS_ERR(reply)) {
|
|
rcu_read_lock(); /*To keep RCU checker happy. */
|
|
err = ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex,
|
|
reply, info->snd_portid,
|
|
info->snd_seq, 0,
|
|
OVS_FLOW_CMD_DEL,
|
|
ufid_flags);
|
|
rcu_read_unlock();
|
|
if (WARN_ON_ONCE(err < 0)) {
|
|
kfree_skb(reply);
|
|
goto out_free;
|
|
}
|
|
|
|
ovs_notify(&dp_flow_genl_family, reply, info);
|
|
} else {
|
|
netlink_set_err(sock_net(skb->sk)->genl_sock, 0, 0, PTR_ERR(reply));
|
|
}
|
|
}
|
|
|
|
out_free:
|
|
ovs_flow_free(flow, true);
|
|
return 0;
|
|
unlock:
|
|
ovs_unlock();
|
|
return err;
|
|
}
|
|
|
|
static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *a[__OVS_FLOW_ATTR_MAX];
|
|
struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
|
|
struct table_instance *ti;
|
|
struct datapath *dp;
|
|
u32 ufid_flags;
|
|
int err;
|
|
|
|
err = genlmsg_parse_deprecated(cb->nlh, &dp_flow_genl_family, a,
|
|
OVS_FLOW_ATTR_MAX, flow_policy, NULL);
|
|
if (err)
|
|
return err;
|
|
ufid_flags = ovs_nla_get_ufid_flags(a[OVS_FLOW_ATTR_UFID_FLAGS]);
|
|
|
|
rcu_read_lock();
|
|
dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
|
|
if (!dp) {
|
|
rcu_read_unlock();
|
|
return -ENODEV;
|
|
}
|
|
|
|
ti = rcu_dereference(dp->table.ti);
|
|
for (;;) {
|
|
struct sw_flow *flow;
|
|
u32 bucket, obj;
|
|
|
|
bucket = cb->args[0];
|
|
obj = cb->args[1];
|
|
flow = ovs_flow_tbl_dump_next(ti, &bucket, &obj);
|
|
if (!flow)
|
|
break;
|
|
|
|
if (ovs_flow_cmd_fill_info(flow, ovs_header->dp_ifindex, skb,
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
OVS_FLOW_CMD_GET, ufid_flags) < 0)
|
|
break;
|
|
|
|
cb->args[0] = bucket;
|
|
cb->args[1] = obj;
|
|
}
|
|
rcu_read_unlock();
|
|
return skb->len;
|
|
}
|
|
|
|
static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
|
|
[OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
|
|
[OVS_FLOW_ATTR_MASK] = { .type = NLA_NESTED },
|
|
[OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
|
|
[OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
|
|
[OVS_FLOW_ATTR_PROBE] = { .type = NLA_FLAG },
|
|
[OVS_FLOW_ATTR_UFID] = { .type = NLA_UNSPEC, .len = 1 },
|
|
[OVS_FLOW_ATTR_UFID_FLAGS] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static const struct genl_ops dp_flow_genl_ops[] = {
|
|
{ .cmd = OVS_FLOW_CMD_NEW,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_flow_cmd_new
|
|
},
|
|
{ .cmd = OVS_FLOW_CMD_DEL,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_flow_cmd_del
|
|
},
|
|
{ .cmd = OVS_FLOW_CMD_GET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
.doit = ovs_flow_cmd_get,
|
|
.dumpit = ovs_flow_cmd_dump
|
|
},
|
|
{ .cmd = OVS_FLOW_CMD_SET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_flow_cmd_set,
|
|
},
|
|
};
|
|
|
|
static struct genl_family dp_flow_genl_family __ro_after_init = {
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
.name = OVS_FLOW_FAMILY,
|
|
.version = OVS_FLOW_VERSION,
|
|
.maxattr = OVS_FLOW_ATTR_MAX,
|
|
.policy = flow_policy,
|
|
.netnsok = true,
|
|
.parallel_ops = true,
|
|
.ops = dp_flow_genl_ops,
|
|
.n_ops = ARRAY_SIZE(dp_flow_genl_ops),
|
|
.mcgrps = &ovs_dp_flow_multicast_group,
|
|
.n_mcgrps = 1,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
static size_t ovs_dp_cmd_msg_size(void)
|
|
{
|
|
size_t msgsize = NLMSG_ALIGN(sizeof(struct ovs_header));
|
|
|
|
msgsize += nla_total_size(IFNAMSIZ);
|
|
msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_stats));
|
|
msgsize += nla_total_size_64bit(sizeof(struct ovs_dp_megaflow_stats));
|
|
msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_USER_FEATURES */
|
|
|
|
return msgsize;
|
|
}
|
|
|
|
/* Called with ovs_mutex. */
|
|
static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
|
|
u32 portid, u32 seq, u32 flags, u8 cmd)
|
|
{
|
|
struct ovs_header *ovs_header;
|
|
struct ovs_dp_stats dp_stats;
|
|
struct ovs_dp_megaflow_stats dp_megaflow_stats;
|
|
int err;
|
|
|
|
ovs_header = genlmsg_put(skb, portid, seq, &dp_datapath_genl_family,
|
|
flags, cmd);
|
|
if (!ovs_header)
|
|
goto error;
|
|
|
|
ovs_header->dp_ifindex = get_dpifindex(dp);
|
|
|
|
err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
|
|
if (err)
|
|
goto nla_put_failure;
|
|
|
|
get_dp_stats(dp, &dp_stats, &dp_megaflow_stats);
|
|
if (nla_put_64bit(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats),
|
|
&dp_stats, OVS_DP_ATTR_PAD))
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_64bit(skb, OVS_DP_ATTR_MEGAFLOW_STATS,
|
|
sizeof(struct ovs_dp_megaflow_stats),
|
|
&dp_megaflow_stats, OVS_DP_ATTR_PAD))
|
|
goto nla_put_failure;
|
|
|
|
if (nla_put_u32(skb, OVS_DP_ATTR_USER_FEATURES, dp->user_features))
|
|
goto nla_put_failure;
|
|
|
|
genlmsg_end(skb, ovs_header);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
genlmsg_cancel(skb, ovs_header);
|
|
error:
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static struct sk_buff *ovs_dp_cmd_alloc_info(void)
|
|
{
|
|
return genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL);
|
|
}
|
|
|
|
/* Called with rcu_read_lock or ovs_mutex. */
|
|
static struct datapath *lookup_datapath(struct net *net,
|
|
const struct ovs_header *ovs_header,
|
|
struct nlattr *a[OVS_DP_ATTR_MAX + 1])
|
|
{
|
|
struct datapath *dp;
|
|
|
|
if (!a[OVS_DP_ATTR_NAME])
|
|
dp = get_dp(net, ovs_header->dp_ifindex);
|
|
else {
|
|
struct vport *vport;
|
|
|
|
vport = ovs_vport_locate(net, nla_data(a[OVS_DP_ATTR_NAME]));
|
|
dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
|
|
}
|
|
return dp ? dp : ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static void ovs_dp_reset_user_features(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct datapath *dp;
|
|
|
|
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
|
|
if (IS_ERR(dp))
|
|
return;
|
|
|
|
WARN(dp->user_features, "Dropping previously announced user features\n");
|
|
dp->user_features = 0;
|
|
}
|
|
|
|
DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support);
|
|
|
|
static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
|
|
{
|
|
u32 user_features = 0;
|
|
|
|
if (a[OVS_DP_ATTR_USER_FEATURES]) {
|
|
user_features = nla_get_u32(a[OVS_DP_ATTR_USER_FEATURES]);
|
|
|
|
if (user_features & ~(OVS_DP_F_VPORT_PIDS |
|
|
OVS_DP_F_UNALIGNED |
|
|
OVS_DP_F_TC_RECIRC_SHARING))
|
|
return -EOPNOTSUPP;
|
|
|
|
#if !IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
|
|
if (user_features & OVS_DP_F_TC_RECIRC_SHARING)
|
|
return -EOPNOTSUPP;
|
|
#endif
|
|
}
|
|
|
|
dp->user_features = user_features;
|
|
|
|
if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING)
|
|
static_branch_enable(&tc_recirc_sharing_support);
|
|
else
|
|
static_branch_disable(&tc_recirc_sharing_support);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ovs_dp_stats_init(struct datapath *dp)
|
|
{
|
|
dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
|
|
if (!dp->stats_percpu)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ovs_dp_vport_init(struct datapath *dp)
|
|
{
|
|
int i;
|
|
|
|
dp->ports = kmalloc_array(DP_VPORT_HASH_BUCKETS,
|
|
sizeof(struct hlist_head),
|
|
GFP_KERNEL);
|
|
if (!dp->ports)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
|
|
INIT_HLIST_HEAD(&dp->ports[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct vport_parms parms;
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
struct vport *vport;
|
|
struct ovs_net *ovs_net;
|
|
int err;
|
|
|
|
err = -EINVAL;
|
|
if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
|
|
goto err;
|
|
|
|
reply = ovs_dp_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
err = -ENOMEM;
|
|
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
|
|
if (dp == NULL)
|
|
goto err_destroy_reply;
|
|
|
|
ovs_dp_set_net(dp, sock_net(skb->sk));
|
|
|
|
/* Allocate table. */
|
|
err = ovs_flow_tbl_init(&dp->table);
|
|
if (err)
|
|
goto err_destroy_dp;
|
|
|
|
err = ovs_dp_stats_init(dp);
|
|
if (err)
|
|
goto err_destroy_table;
|
|
|
|
err = ovs_dp_vport_init(dp);
|
|
if (err)
|
|
goto err_destroy_stats;
|
|
|
|
err = ovs_meters_init(dp);
|
|
if (err)
|
|
goto err_destroy_ports;
|
|
|
|
/* Set up our datapath device. */
|
|
parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
|
|
parms.type = OVS_VPORT_TYPE_INTERNAL;
|
|
parms.options = NULL;
|
|
parms.dp = dp;
|
|
parms.port_no = OVSP_LOCAL;
|
|
parms.upcall_portids = a[OVS_DP_ATTR_UPCALL_PID];
|
|
|
|
err = ovs_dp_change(dp, a);
|
|
if (err)
|
|
goto err_destroy_meters;
|
|
|
|
/* So far only local changes have been made, now need the lock. */
|
|
ovs_lock();
|
|
|
|
vport = new_vport(&parms);
|
|
if (IS_ERR(vport)) {
|
|
err = PTR_ERR(vport);
|
|
if (err == -EBUSY)
|
|
err = -EEXIST;
|
|
|
|
if (err == -EEXIST) {
|
|
/* An outdated user space instance that does not understand
|
|
* the concept of user_features has attempted to create a new
|
|
* datapath and is likely to reuse it. Drop all user features.
|
|
*/
|
|
if (info->genlhdr->version < OVS_DP_VER_FEATURES)
|
|
ovs_dp_reset_user_features(skb, info);
|
|
}
|
|
|
|
ovs_unlock();
|
|
goto err_destroy_meters;
|
|
}
|
|
|
|
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
|
|
info->snd_seq, 0, OVS_DP_CMD_NEW);
|
|
BUG_ON(err < 0);
|
|
|
|
ovs_net = net_generic(ovs_dp_get_net(dp), ovs_net_id);
|
|
list_add_tail_rcu(&dp->list_node, &ovs_net->dps);
|
|
|
|
ovs_unlock();
|
|
|
|
ovs_notify(&dp_datapath_genl_family, reply, info);
|
|
return 0;
|
|
|
|
err_destroy_meters:
|
|
ovs_meters_exit(dp);
|
|
err_destroy_ports:
|
|
kfree(dp->ports);
|
|
err_destroy_stats:
|
|
free_percpu(dp->stats_percpu);
|
|
err_destroy_table:
|
|
ovs_flow_tbl_destroy(&dp->table);
|
|
err_destroy_dp:
|
|
kfree(dp);
|
|
err_destroy_reply:
|
|
kfree_skb(reply);
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
/* Called with ovs_mutex. */
|
|
static void __dp_destroy(struct datapath *dp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
|
|
struct vport *vport;
|
|
struct hlist_node *n;
|
|
|
|
hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node)
|
|
if (vport->port_no != OVSP_LOCAL)
|
|
ovs_dp_detach_port(vport);
|
|
}
|
|
|
|
list_del_rcu(&dp->list_node);
|
|
|
|
/* OVSP_LOCAL is datapath internal port. We need to make sure that
|
|
* all ports in datapath are destroyed first before freeing datapath.
|
|
*/
|
|
ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL));
|
|
|
|
/* RCU destroy the flow table */
|
|
call_rcu(&dp->rcu, destroy_dp_rcu);
|
|
}
|
|
|
|
static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
int err;
|
|
|
|
reply = ovs_dp_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
|
|
err = PTR_ERR(dp);
|
|
if (IS_ERR(dp))
|
|
goto err_unlock_free;
|
|
|
|
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
|
|
info->snd_seq, 0, OVS_DP_CMD_DEL);
|
|
BUG_ON(err < 0);
|
|
|
|
__dp_destroy(dp);
|
|
ovs_unlock();
|
|
|
|
ovs_notify(&dp_datapath_genl_family, reply, info);
|
|
|
|
return 0;
|
|
|
|
err_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_dp_cmd_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
int err;
|
|
|
|
reply = ovs_dp_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
|
|
err = PTR_ERR(dp);
|
|
if (IS_ERR(dp))
|
|
goto err_unlock_free;
|
|
|
|
err = ovs_dp_change(dp, info->attrs);
|
|
if (err)
|
|
goto err_unlock_free;
|
|
|
|
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
|
|
info->snd_seq, 0, OVS_DP_CMD_SET);
|
|
BUG_ON(err < 0);
|
|
|
|
ovs_unlock();
|
|
ovs_notify(&dp_datapath_genl_family, reply, info);
|
|
|
|
return 0;
|
|
|
|
err_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
int err;
|
|
|
|
reply = ovs_dp_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
dp = lookup_datapath(sock_net(skb->sk), info->userhdr, info->attrs);
|
|
if (IS_ERR(dp)) {
|
|
err = PTR_ERR(dp);
|
|
goto err_unlock_free;
|
|
}
|
|
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
|
|
info->snd_seq, 0, OVS_DP_CMD_GET);
|
|
BUG_ON(err < 0);
|
|
ovs_unlock();
|
|
|
|
return genlmsg_reply(reply, info);
|
|
|
|
err_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct ovs_net *ovs_net = net_generic(sock_net(skb->sk), ovs_net_id);
|
|
struct datapath *dp;
|
|
int skip = cb->args[0];
|
|
int i = 0;
|
|
|
|
ovs_lock();
|
|
list_for_each_entry(dp, &ovs_net->dps, list_node) {
|
|
if (i >= skip &&
|
|
ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
OVS_DP_CMD_GET) < 0)
|
|
break;
|
|
i++;
|
|
}
|
|
ovs_unlock();
|
|
|
|
cb->args[0] = i;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static const struct nla_policy datapath_policy[OVS_DP_ATTR_MAX + 1] = {
|
|
[OVS_DP_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
|
|
[OVS_DP_ATTR_UPCALL_PID] = { .type = NLA_U32 },
|
|
[OVS_DP_ATTR_USER_FEATURES] = { .type = NLA_U32 },
|
|
};
|
|
|
|
static const struct genl_ops dp_datapath_genl_ops[] = {
|
|
{ .cmd = OVS_DP_CMD_NEW,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_dp_cmd_new
|
|
},
|
|
{ .cmd = OVS_DP_CMD_DEL,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_dp_cmd_del
|
|
},
|
|
{ .cmd = OVS_DP_CMD_GET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
.doit = ovs_dp_cmd_get,
|
|
.dumpit = ovs_dp_cmd_dump
|
|
},
|
|
{ .cmd = OVS_DP_CMD_SET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_dp_cmd_set,
|
|
},
|
|
};
|
|
|
|
static struct genl_family dp_datapath_genl_family __ro_after_init = {
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
.name = OVS_DATAPATH_FAMILY,
|
|
.version = OVS_DATAPATH_VERSION,
|
|
.maxattr = OVS_DP_ATTR_MAX,
|
|
.policy = datapath_policy,
|
|
.netnsok = true,
|
|
.parallel_ops = true,
|
|
.ops = dp_datapath_genl_ops,
|
|
.n_ops = ARRAY_SIZE(dp_datapath_genl_ops),
|
|
.mcgrps = &ovs_dp_datapath_multicast_group,
|
|
.n_mcgrps = 1,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
/* Called with ovs_mutex or RCU read lock. */
|
|
static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
|
|
struct net *net, u32 portid, u32 seq,
|
|
u32 flags, u8 cmd, gfp_t gfp)
|
|
{
|
|
struct ovs_header *ovs_header;
|
|
struct ovs_vport_stats vport_stats;
|
|
int err;
|
|
|
|
ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
|
|
flags, cmd);
|
|
if (!ovs_header)
|
|
return -EMSGSIZE;
|
|
|
|
ovs_header->dp_ifindex = get_dpifindex(vport->dp);
|
|
|
|
if (nla_put_u32(skb, OVS_VPORT_ATTR_PORT_NO, vport->port_no) ||
|
|
nla_put_u32(skb, OVS_VPORT_ATTR_TYPE, vport->ops->type) ||
|
|
nla_put_string(skb, OVS_VPORT_ATTR_NAME,
|
|
ovs_vport_name(vport)) ||
|
|
nla_put_u32(skb, OVS_VPORT_ATTR_IFINDEX, vport->dev->ifindex))
|
|
goto nla_put_failure;
|
|
|
|
if (!net_eq(net, dev_net(vport->dev))) {
|
|
int id = peernet2id_alloc(net, dev_net(vport->dev), gfp);
|
|
|
|
if (nla_put_s32(skb, OVS_VPORT_ATTR_NETNSID, id))
|
|
goto nla_put_failure;
|
|
}
|
|
|
|
ovs_vport_get_stats(vport, &vport_stats);
|
|
if (nla_put_64bit(skb, OVS_VPORT_ATTR_STATS,
|
|
sizeof(struct ovs_vport_stats), &vport_stats,
|
|
OVS_VPORT_ATTR_PAD))
|
|
goto nla_put_failure;
|
|
|
|
if (ovs_vport_get_upcall_portids(vport, skb))
|
|
goto nla_put_failure;
|
|
|
|
err = ovs_vport_get_options(vport, skb);
|
|
if (err == -EMSGSIZE)
|
|
goto error;
|
|
|
|
genlmsg_end(skb, ovs_header);
|
|
return 0;
|
|
|
|
nla_put_failure:
|
|
err = -EMSGSIZE;
|
|
error:
|
|
genlmsg_cancel(skb, ovs_header);
|
|
return err;
|
|
}
|
|
|
|
static struct sk_buff *ovs_vport_cmd_alloc_info(void)
|
|
{
|
|
return nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
}
|
|
|
|
/* Called with ovs_mutex, only via ovs_dp_notify_wq(). */
|
|
struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net,
|
|
u32 portid, u32 seq, u8 cmd)
|
|
{
|
|
struct sk_buff *skb;
|
|
int retval;
|
|
|
|
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
retval = ovs_vport_cmd_fill_info(vport, skb, net, portid, seq, 0, cmd,
|
|
GFP_KERNEL);
|
|
BUG_ON(retval < 0);
|
|
|
|
return skb;
|
|
}
|
|
|
|
/* Called with ovs_mutex or RCU read lock. */
|
|
static struct vport *lookup_vport(struct net *net,
|
|
const struct ovs_header *ovs_header,
|
|
struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
|
|
{
|
|
struct datapath *dp;
|
|
struct vport *vport;
|
|
|
|
if (a[OVS_VPORT_ATTR_IFINDEX])
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
if (a[OVS_VPORT_ATTR_NAME]) {
|
|
vport = ovs_vport_locate(net, nla_data(a[OVS_VPORT_ATTR_NAME]));
|
|
if (!vport)
|
|
return ERR_PTR(-ENODEV);
|
|
if (ovs_header->dp_ifindex &&
|
|
ovs_header->dp_ifindex != get_dpifindex(vport->dp))
|
|
return ERR_PTR(-ENODEV);
|
|
return vport;
|
|
} else if (a[OVS_VPORT_ATTR_PORT_NO]) {
|
|
u32 port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
|
|
|
|
if (port_no >= DP_MAX_PORTS)
|
|
return ERR_PTR(-EFBIG);
|
|
|
|
dp = get_dp(net, ovs_header->dp_ifindex);
|
|
if (!dp)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
vport = ovs_vport_ovsl_rcu(dp, port_no);
|
|
if (!vport)
|
|
return ERR_PTR(-ENODEV);
|
|
return vport;
|
|
} else
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
static unsigned int ovs_get_max_headroom(struct datapath *dp)
|
|
{
|
|
unsigned int dev_headroom, max_headroom = 0;
|
|
struct net_device *dev;
|
|
struct vport *vport;
|
|
int i;
|
|
|
|
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
|
|
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node,
|
|
lockdep_ovsl_is_held()) {
|
|
dev = vport->dev;
|
|
dev_headroom = netdev_get_fwd_headroom(dev);
|
|
if (dev_headroom > max_headroom)
|
|
max_headroom = dev_headroom;
|
|
}
|
|
}
|
|
|
|
return max_headroom;
|
|
}
|
|
|
|
/* Called with ovs_mutex */
|
|
static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom)
|
|
{
|
|
struct vport *vport;
|
|
int i;
|
|
|
|
dp->max_headroom = new_headroom;
|
|
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
|
|
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node,
|
|
lockdep_ovsl_is_held())
|
|
netdev_set_rx_headroom(vport->dev, new_headroom);
|
|
}
|
|
|
|
static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct vport_parms parms;
|
|
struct sk_buff *reply;
|
|
struct vport *vport;
|
|
struct datapath *dp;
|
|
unsigned int new_headroom;
|
|
u32 port_no;
|
|
int err;
|
|
|
|
if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
|
|
!a[OVS_VPORT_ATTR_UPCALL_PID])
|
|
return -EINVAL;
|
|
if (a[OVS_VPORT_ATTR_IFINDEX])
|
|
return -EOPNOTSUPP;
|
|
|
|
port_no = a[OVS_VPORT_ATTR_PORT_NO]
|
|
? nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]) : 0;
|
|
if (port_no >= DP_MAX_PORTS)
|
|
return -EFBIG;
|
|
|
|
reply = ovs_vport_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
restart:
|
|
dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);
|
|
err = -ENODEV;
|
|
if (!dp)
|
|
goto exit_unlock_free;
|
|
|
|
if (port_no) {
|
|
vport = ovs_vport_ovsl(dp, port_no);
|
|
err = -EBUSY;
|
|
if (vport)
|
|
goto exit_unlock_free;
|
|
} else {
|
|
for (port_no = 1; ; port_no++) {
|
|
if (port_no >= DP_MAX_PORTS) {
|
|
err = -EFBIG;
|
|
goto exit_unlock_free;
|
|
}
|
|
vport = ovs_vport_ovsl(dp, port_no);
|
|
if (!vport)
|
|
break;
|
|
}
|
|
}
|
|
|
|
parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);
|
|
parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);
|
|
parms.options = a[OVS_VPORT_ATTR_OPTIONS];
|
|
parms.dp = dp;
|
|
parms.port_no = port_no;
|
|
parms.upcall_portids = a[OVS_VPORT_ATTR_UPCALL_PID];
|
|
|
|
vport = new_vport(&parms);
|
|
err = PTR_ERR(vport);
|
|
if (IS_ERR(vport)) {
|
|
if (err == -EAGAIN)
|
|
goto restart;
|
|
goto exit_unlock_free;
|
|
}
|
|
|
|
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
|
|
info->snd_portid, info->snd_seq, 0,
|
|
OVS_VPORT_CMD_NEW, GFP_KERNEL);
|
|
|
|
new_headroom = netdev_get_fwd_headroom(vport->dev);
|
|
|
|
if (new_headroom > dp->max_headroom)
|
|
ovs_update_headroom(dp, new_headroom);
|
|
else
|
|
netdev_set_rx_headroom(vport->dev, dp->max_headroom);
|
|
|
|
BUG_ON(err < 0);
|
|
ovs_unlock();
|
|
|
|
ovs_notify(&dp_vport_genl_family, reply, info);
|
|
return 0;
|
|
|
|
exit_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct sk_buff *reply;
|
|
struct vport *vport;
|
|
int err;
|
|
|
|
reply = ovs_vport_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
|
|
err = PTR_ERR(vport);
|
|
if (IS_ERR(vport))
|
|
goto exit_unlock_free;
|
|
|
|
if (a[OVS_VPORT_ATTR_TYPE] &&
|
|
nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) {
|
|
err = -EINVAL;
|
|
goto exit_unlock_free;
|
|
}
|
|
|
|
if (a[OVS_VPORT_ATTR_OPTIONS]) {
|
|
err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
|
|
if (err)
|
|
goto exit_unlock_free;
|
|
}
|
|
|
|
|
|
if (a[OVS_VPORT_ATTR_UPCALL_PID]) {
|
|
struct nlattr *ids = a[OVS_VPORT_ATTR_UPCALL_PID];
|
|
|
|
err = ovs_vport_set_upcall_portids(vport, ids);
|
|
if (err)
|
|
goto exit_unlock_free;
|
|
}
|
|
|
|
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
|
|
info->snd_portid, info->snd_seq, 0,
|
|
OVS_VPORT_CMD_SET, GFP_KERNEL);
|
|
BUG_ON(err < 0);
|
|
|
|
ovs_unlock();
|
|
ovs_notify(&dp_vport_genl_family, reply, info);
|
|
return 0;
|
|
|
|
exit_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
bool update_headroom = false;
|
|
struct nlattr **a = info->attrs;
|
|
struct sk_buff *reply;
|
|
struct datapath *dp;
|
|
struct vport *vport;
|
|
unsigned int new_headroom;
|
|
int err;
|
|
|
|
reply = ovs_vport_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
ovs_lock();
|
|
vport = lookup_vport(sock_net(skb->sk), info->userhdr, a);
|
|
err = PTR_ERR(vport);
|
|
if (IS_ERR(vport))
|
|
goto exit_unlock_free;
|
|
|
|
if (vport->port_no == OVSP_LOCAL) {
|
|
err = -EINVAL;
|
|
goto exit_unlock_free;
|
|
}
|
|
|
|
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
|
|
info->snd_portid, info->snd_seq, 0,
|
|
OVS_VPORT_CMD_DEL, GFP_KERNEL);
|
|
BUG_ON(err < 0);
|
|
|
|
/* the vport deletion may trigger dp headroom update */
|
|
dp = vport->dp;
|
|
if (netdev_get_fwd_headroom(vport->dev) == dp->max_headroom)
|
|
update_headroom = true;
|
|
|
|
netdev_reset_rx_headroom(vport->dev);
|
|
ovs_dp_detach_port(vport);
|
|
|
|
if (update_headroom) {
|
|
new_headroom = ovs_get_max_headroom(dp);
|
|
|
|
if (new_headroom < dp->max_headroom)
|
|
ovs_update_headroom(dp, new_headroom);
|
|
}
|
|
ovs_unlock();
|
|
|
|
ovs_notify(&dp_vport_genl_family, reply, info);
|
|
return 0;
|
|
|
|
exit_unlock_free:
|
|
ovs_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_vport_cmd_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct nlattr **a = info->attrs;
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
struct sk_buff *reply;
|
|
struct vport *vport;
|
|
int err;
|
|
|
|
reply = ovs_vport_cmd_alloc_info();
|
|
if (!reply)
|
|
return -ENOMEM;
|
|
|
|
rcu_read_lock();
|
|
vport = lookup_vport(sock_net(skb->sk), ovs_header, a);
|
|
err = PTR_ERR(vport);
|
|
if (IS_ERR(vport))
|
|
goto exit_unlock_free;
|
|
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
|
|
info->snd_portid, info->snd_seq, 0,
|
|
OVS_VPORT_CMD_GET, GFP_ATOMIC);
|
|
BUG_ON(err < 0);
|
|
rcu_read_unlock();
|
|
|
|
return genlmsg_reply(reply, info);
|
|
|
|
exit_unlock_free:
|
|
rcu_read_unlock();
|
|
kfree_skb(reply);
|
|
return err;
|
|
}
|
|
|
|
static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
|
|
struct datapath *dp;
|
|
int bucket = cb->args[0], skip = cb->args[1];
|
|
int i, j = 0;
|
|
|
|
rcu_read_lock();
|
|
dp = get_dp_rcu(sock_net(skb->sk), ovs_header->dp_ifindex);
|
|
if (!dp) {
|
|
rcu_read_unlock();
|
|
return -ENODEV;
|
|
}
|
|
for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) {
|
|
struct vport *vport;
|
|
|
|
j = 0;
|
|
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
|
|
if (j >= skip &&
|
|
ovs_vport_cmd_fill_info(vport, skb,
|
|
sock_net(skb->sk),
|
|
NETLINK_CB(cb->skb).portid,
|
|
cb->nlh->nlmsg_seq,
|
|
NLM_F_MULTI,
|
|
OVS_VPORT_CMD_GET,
|
|
GFP_ATOMIC) < 0)
|
|
goto out;
|
|
|
|
j++;
|
|
}
|
|
skip = 0;
|
|
}
|
|
out:
|
|
rcu_read_unlock();
|
|
|
|
cb->args[0] = i;
|
|
cb->args[1] = j;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
|
|
[OVS_VPORT_ATTR_NAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
|
|
[OVS_VPORT_ATTR_STATS] = { .len = sizeof(struct ovs_vport_stats) },
|
|
[OVS_VPORT_ATTR_PORT_NO] = { .type = NLA_U32 },
|
|
[OVS_VPORT_ATTR_TYPE] = { .type = NLA_U32 },
|
|
[OVS_VPORT_ATTR_UPCALL_PID] = { .type = NLA_UNSPEC },
|
|
[OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
|
|
[OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 },
|
|
[OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 },
|
|
};
|
|
|
|
static const struct genl_ops dp_vport_genl_ops[] = {
|
|
{ .cmd = OVS_VPORT_CMD_NEW,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_vport_cmd_new
|
|
},
|
|
{ .cmd = OVS_VPORT_CMD_DEL,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_vport_cmd_del
|
|
},
|
|
{ .cmd = OVS_VPORT_CMD_GET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
.doit = ovs_vport_cmd_get,
|
|
.dumpit = ovs_vport_cmd_dump
|
|
},
|
|
{ .cmd = OVS_VPORT_CMD_SET,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
.doit = ovs_vport_cmd_set,
|
|
},
|
|
};
|
|
|
|
struct genl_family dp_vport_genl_family __ro_after_init = {
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
.name = OVS_VPORT_FAMILY,
|
|
.version = OVS_VPORT_VERSION,
|
|
.maxattr = OVS_VPORT_ATTR_MAX,
|
|
.policy = vport_policy,
|
|
.netnsok = true,
|
|
.parallel_ops = true,
|
|
.ops = dp_vport_genl_ops,
|
|
.n_ops = ARRAY_SIZE(dp_vport_genl_ops),
|
|
.mcgrps = &ovs_dp_vport_multicast_group,
|
|
.n_mcgrps = 1,
|
|
.module = THIS_MODULE,
|
|
};
|
|
|
|
static struct genl_family * const dp_genl_families[] = {
|
|
&dp_datapath_genl_family,
|
|
&dp_vport_genl_family,
|
|
&dp_flow_genl_family,
|
|
&dp_packet_genl_family,
|
|
&dp_meter_genl_family,
|
|
#if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT)
|
|
&dp_ct_limit_genl_family,
|
|
#endif
|
|
};
|
|
|
|
static void dp_unregister_genl(int n_families)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n_families; i++)
|
|
genl_unregister_family(dp_genl_families[i]);
|
|
}
|
|
|
|
static int __init dp_register_genl(void)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
|
|
|
|
err = genl_register_family(dp_genl_families[i]);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
dp_unregister_genl(i);
|
|
return err;
|
|
}
|
|
|
|
static int __net_init ovs_init_net(struct net *net)
|
|
{
|
|
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
|
|
|
|
INIT_LIST_HEAD(&ovs_net->dps);
|
|
INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq);
|
|
return ovs_ct_init(net);
|
|
}
|
|
|
|
static void __net_exit list_vports_from_net(struct net *net, struct net *dnet,
|
|
struct list_head *head)
|
|
{
|
|
struct ovs_net *ovs_net = net_generic(net, ovs_net_id);
|
|
struct datapath *dp;
|
|
|
|
list_for_each_entry(dp, &ovs_net->dps, list_node) {
|
|
int i;
|
|
|
|
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
|
|
struct vport *vport;
|
|
|
|
hlist_for_each_entry(vport, &dp->ports[i], dp_hash_node) {
|
|
if (vport->ops->type != OVS_VPORT_TYPE_INTERNAL)
|
|
continue;
|
|
|
|
if (dev_net(vport->dev) == dnet)
|
|
list_add(&vport->detach_list, head);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __net_exit ovs_exit_net(struct net *dnet)
|
|
{
|
|
struct datapath *dp, *dp_next;
|
|
struct ovs_net *ovs_net = net_generic(dnet, ovs_net_id);
|
|
struct vport *vport, *vport_next;
|
|
struct net *net;
|
|
LIST_HEAD(head);
|
|
|
|
ovs_lock();
|
|
|
|
ovs_ct_exit(dnet);
|
|
|
|
list_for_each_entry_safe(dp, dp_next, &ovs_net->dps, list_node)
|
|
__dp_destroy(dp);
|
|
|
|
down_read(&net_rwsem);
|
|
for_each_net(net)
|
|
list_vports_from_net(net, dnet, &head);
|
|
up_read(&net_rwsem);
|
|
|
|
/* Detach all vports from given namespace. */
|
|
list_for_each_entry_safe(vport, vport_next, &head, detach_list) {
|
|
list_del(&vport->detach_list);
|
|
ovs_dp_detach_port(vport);
|
|
}
|
|
|
|
ovs_unlock();
|
|
|
|
cancel_work_sync(&ovs_net->dp_notify_work);
|
|
}
|
|
|
|
static struct pernet_operations ovs_net_ops = {
|
|
.init = ovs_init_net,
|
|
.exit = ovs_exit_net,
|
|
.id = &ovs_net_id,
|
|
.size = sizeof(struct ovs_net),
|
|
};
|
|
|
|
static int __init dp_init(void)
|
|
{
|
|
int err;
|
|
|
|
BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof_field(struct sk_buff, cb));
|
|
|
|
pr_info("Open vSwitch switching datapath\n");
|
|
|
|
err = action_fifos_init();
|
|
if (err)
|
|
goto error;
|
|
|
|
err = ovs_internal_dev_rtnl_link_register();
|
|
if (err)
|
|
goto error_action_fifos_exit;
|
|
|
|
err = ovs_flow_init();
|
|
if (err)
|
|
goto error_unreg_rtnl_link;
|
|
|
|
err = ovs_vport_init();
|
|
if (err)
|
|
goto error_flow_exit;
|
|
|
|
err = register_pernet_device(&ovs_net_ops);
|
|
if (err)
|
|
goto error_vport_exit;
|
|
|
|
err = register_netdevice_notifier(&ovs_dp_device_notifier);
|
|
if (err)
|
|
goto error_netns_exit;
|
|
|
|
err = ovs_netdev_init();
|
|
if (err)
|
|
goto error_unreg_notifier;
|
|
|
|
err = dp_register_genl();
|
|
if (err < 0)
|
|
goto error_unreg_netdev;
|
|
|
|
return 0;
|
|
|
|
error_unreg_netdev:
|
|
ovs_netdev_exit();
|
|
error_unreg_notifier:
|
|
unregister_netdevice_notifier(&ovs_dp_device_notifier);
|
|
error_netns_exit:
|
|
unregister_pernet_device(&ovs_net_ops);
|
|
error_vport_exit:
|
|
ovs_vport_exit();
|
|
error_flow_exit:
|
|
ovs_flow_exit();
|
|
error_unreg_rtnl_link:
|
|
ovs_internal_dev_rtnl_link_unregister();
|
|
error_action_fifos_exit:
|
|
action_fifos_exit();
|
|
error:
|
|
return err;
|
|
}
|
|
|
|
static void dp_cleanup(void)
|
|
{
|
|
dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
|
|
ovs_netdev_exit();
|
|
unregister_netdevice_notifier(&ovs_dp_device_notifier);
|
|
unregister_pernet_device(&ovs_net_ops);
|
|
rcu_barrier();
|
|
ovs_vport_exit();
|
|
ovs_flow_exit();
|
|
ovs_internal_dev_rtnl_link_unregister();
|
|
action_fifos_exit();
|
|
}
|
|
|
|
module_init(dp_init);
|
|
module_exit(dp_cleanup);
|
|
|
|
MODULE_DESCRIPTION("Open vSwitch switching datapath");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY);
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY);
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY);
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY);
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY);
|
|
MODULE_ALIAS_GENL_FAMILY(OVS_CT_LIMIT_FAMILY);
|