2011-10-26 04:26:31 +02:00
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/*
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2012-05-04 03:55:23 +02:00
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* Copyright (c) 2007-2012 Nicira, Inc.
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2011-10-26 04:26:31 +02:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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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 <linux/workqueue.h>
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#include <net/genetlink.h>
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#include "datapath.h"
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#include "flow.h"
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#include "vport-internal_dev.h"
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/**
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* DOC: Locking:
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*
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* Writes to device state (add/remove datapath, port, set operations on vports,
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* etc.) are protected by RTNL.
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*
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* Writes to other state (flow table modifications, set miscellaneous datapath
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* parameters, etc.) are protected by genl_mutex. The RTNL lock nests inside
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* genl_mutex.
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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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/* Global list of datapaths to enable dumping them all out.
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* Protected by genl_mutex.
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*/
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static LIST_HEAD(dps);
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#define REHASH_FLOW_INTERVAL (10 * 60 * HZ)
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static void rehash_flow_table(struct work_struct *work);
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static DECLARE_DELAYED_WORK(rehash_flow_wq, rehash_flow_table);
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static struct vport *new_vport(const struct vport_parms *);
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static int queue_gso_packets(int dp_ifindex, struct sk_buff *,
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const struct dp_upcall_info *);
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static int queue_userspace_packet(int dp_ifindex, struct sk_buff *,
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const struct dp_upcall_info *);
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/* Must be called with rcu_read_lock, genl_mutex, or RTNL lock. */
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static struct datapath *get_dp(int dp_ifindex)
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{
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struct datapath *dp = NULL;
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struct net_device *dev;
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rcu_read_lock();
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dev = dev_get_by_index_rcu(&init_net, dp_ifindex);
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if (dev) {
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struct vport *vport = ovs_internal_dev_get_vport(dev);
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if (vport)
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dp = vport->dp;
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}
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rcu_read_unlock();
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return dp;
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}
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/* Must be called with rcu_read_lock or RTNL lock. */
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const char *ovs_dp_name(const struct datapath *dp)
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{
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struct vport *vport = rcu_dereference_rtnl(dp->ports[OVSP_LOCAL]);
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return vport->ops->get_name(vport);
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}
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static int get_dpifindex(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 = rcu_dereference(dp->ports[OVSP_LOCAL]);
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if (local)
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ifindex = local->ops->get_ifindex(local);
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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((__force struct flow_table *)dp->table);
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free_percpu(dp->stats_percpu);
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kfree(dp);
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}
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/* Called with RTNL lock and genl_lock. */
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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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rcu_assign_pointer(dp->ports[parms->port_no], vport);
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list_add(&vport->node, &dp->port_list);
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}
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return vport;
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}
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/* Called with RTNL lock. */
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void ovs_dp_detach_port(struct vport *p)
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{
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ASSERT_RTNL();
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/* First drop references to device. */
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list_del(&p->node);
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rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
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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_received_packet(struct vport *p, struct sk_buff *skb)
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{
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struct datapath *dp = p->dp;
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struct sw_flow *flow;
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struct dp_stats_percpu *stats;
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struct sw_flow_key key;
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u64 *stats_counter;
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int error;
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int key_len;
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stats = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
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/* Extract flow from 'skb' into 'key'. */
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error = ovs_flow_extract(skb, p->port_no, &key, &key_len);
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if (unlikely(error)) {
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kfree_skb(skb);
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return;
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}
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/* Look up flow. */
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flow = ovs_flow_tbl_lookup(rcu_dereference(dp->table), &key, key_len);
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if (unlikely(!flow)) {
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struct dp_upcall_info upcall;
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upcall.cmd = OVS_PACKET_CMD_MISS;
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upcall.key = &key;
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upcall.userdata = NULL;
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upcall.pid = p->upcall_pid;
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ovs_dp_upcall(dp, skb, &upcall);
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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_CB(skb)->flow = flow;
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stats_counter = &stats->n_hit;
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ovs_flow_used(OVS_CB(skb)->flow, skb);
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ovs_execute_actions(dp, skb);
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out:
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/* Update datapath statistics. */
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u64_stats_update_begin(&stats->sync);
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(*stats_counter)++;
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u64_stats_update_end(&stats->sync);
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}
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static struct genl_family dp_packet_genl_family = {
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.id = GENL_ID_GENERATE,
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.hdrsize = sizeof(struct ovs_header),
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.name = OVS_PACKET_FAMILY,
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.version = OVS_PACKET_VERSION,
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.maxattr = OVS_PACKET_ATTR_MAX
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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 dp_upcall_info *upcall_info)
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{
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struct dp_stats_percpu *stats;
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int dp_ifindex;
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int err;
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if (upcall_info->pid == 0) {
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err = -ENOTCONN;
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goto err;
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}
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dp_ifindex = get_dpifindex(dp);
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if (!dp_ifindex) {
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err = -ENODEV;
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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_ifindex, skb, upcall_info);
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else
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err = queue_gso_packets(dp_ifindex, skb, upcall_info);
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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 = per_cpu_ptr(dp->stats_percpu, smp_processor_id());
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u64_stats_update_begin(&stats->sync);
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stats->n_lost++;
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u64_stats_update_end(&stats->sync);
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return err;
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}
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static int queue_gso_packets(int dp_ifindex, struct sk_buff *skb,
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const struct dp_upcall_info *upcall_info)
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{
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2012-07-20 23:47:54 +02:00
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unsigned short gso_type = skb_shinfo(skb)->gso_type;
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2011-10-26 04:26:31 +02:00
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struct dp_upcall_info later_info;
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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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segs = skb_gso_segment(skb, NETIF_F_SG | NETIF_F_HW_CSUM);
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2012-07-20 23:46:29 +02:00
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if (IS_ERR(segs))
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return PTR_ERR(segs);
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2011-10-26 04:26:31 +02:00
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/* Queue all of the segments. */
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skb = segs;
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do {
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err = queue_userspace_packet(dp_ifindex, skb, upcall_info);
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if (err)
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break;
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2012-07-20 23:47:54 +02:00
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if (skb == segs && gso_type & SKB_GSO_UDP) {
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2011-10-26 04:26:31 +02:00
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/* The initial flow key extracted by ovs_flow_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 = *upcall_info->key;
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later_key.ip.frag = OVS_FRAG_TYPE_LATER;
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later_info = *upcall_info;
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later_info.key = &later_key;
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upcall_info = &later_info;
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}
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} while ((skb = skb->next));
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/* Free all of the segments. */
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skb = segs;
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do {
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nskb = skb->next;
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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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} while ((skb = nskb));
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return err;
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}
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static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
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const struct dp_upcall_info *upcall_info)
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{
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struct ovs_header *upcall;
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struct sk_buff *nskb = NULL;
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struct sk_buff *user_skb; /* to be queued to userspace */
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struct nlattr *nla;
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unsigned int len;
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int err;
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if (vlan_tx_tag_present(skb)) {
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (!nskb)
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return -ENOMEM;
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nskb = __vlan_put_tag(nskb, vlan_tx_tag_get(nskb));
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if (!skb)
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return -ENOMEM;
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nskb->vlan_tci = 0;
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skb = nskb;
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}
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if (nla_attr_size(skb->len) > USHRT_MAX) {
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err = -EFBIG;
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goto out;
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}
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len = sizeof(struct ovs_header);
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len += nla_total_size(skb->len);
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len += nla_total_size(FLOW_BUFSIZE);
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if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
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len += nla_total_size(8);
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user_skb = genlmsg_new(len, GFP_ATOMIC);
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if (!user_skb) {
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err = -ENOMEM;
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goto out;
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}
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upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
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0, upcall_info->cmd);
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upcall->dp_ifindex = dp_ifindex;
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nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
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ovs_flow_to_nlattrs(upcall_info->key, user_skb);
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nla_nest_end(user_skb, nla);
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if (upcall_info->userdata)
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nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
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nla_get_u64(upcall_info->userdata));
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nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);
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skb_copy_and_csum_dev(skb, nla_data(nla));
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err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid);
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out:
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|
|
kfree_skb(nskb);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called with genl_mutex. */
|
|
|
|
static int flush_flows(int dp_ifindex)
|
|
|
|
{
|
|
|
|
struct flow_table *old_table;
|
|
|
|
struct flow_table *new_table;
|
|
|
|
struct datapath *dp;
|
|
|
|
|
|
|
|
dp = get_dp(dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
old_table = genl_dereference(dp->table);
|
|
|
|
new_table = ovs_flow_tbl_alloc(TBL_MIN_BUCKETS);
|
|
|
|
if (!new_table)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
rcu_assign_pointer(dp->table, new_table);
|
|
|
|
|
|
|
|
ovs_flow_tbl_deferred_destroy(old_table);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_actions(const struct nlattr *attr,
|
|
|
|
const struct sw_flow_key *key, int depth);
|
|
|
|
|
|
|
|
static int validate_sample(const struct nlattr *attr,
|
|
|
|
const struct sw_flow_key *key, int depth)
|
|
|
|
{
|
|
|
|
const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
|
|
|
|
const struct nlattr *probability, *actions;
|
|
|
|
const struct nlattr *a;
|
|
|
|
int rem;
|
|
|
|
|
|
|
|
memset(attrs, 0, sizeof(attrs));
|
|
|
|
nla_for_each_nested(a, attr, rem) {
|
|
|
|
int type = nla_type(a);
|
|
|
|
if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
|
|
|
|
return -EINVAL;
|
|
|
|
attrs[type] = a;
|
|
|
|
}
|
|
|
|
if (rem)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
|
|
|
|
if (!probability || nla_len(probability) != sizeof(u32))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
|
|
|
|
if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
|
|
|
|
return -EINVAL;
|
|
|
|
return validate_actions(actions, key, depth + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_set(const struct nlattr *a,
|
|
|
|
const struct sw_flow_key *flow_key)
|
|
|
|
{
|
|
|
|
const struct nlattr *ovs_key = nla_data(a);
|
|
|
|
int key_type = nla_type(ovs_key);
|
|
|
|
|
|
|
|
/* There can be only one key in a action */
|
|
|
|
if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (key_type > OVS_KEY_ATTR_MAX ||
|
|
|
|
nla_len(ovs_key) != ovs_key_lens[key_type])
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
switch (key_type) {
|
|
|
|
const struct ovs_key_ipv4 *ipv4_key;
|
|
|
|
|
|
|
|
case OVS_KEY_ATTR_PRIORITY:
|
|
|
|
case OVS_KEY_ATTR_ETHERNET:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_KEY_ATTR_IPV4:
|
|
|
|
if (flow_key->eth.type != htons(ETH_P_IP))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
ipv4_key = nla_data(ovs_key);
|
|
|
|
if (ipv4_key->ipv4_proto != flow_key->ip.proto)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (ipv4_key->ipv4_frag != flow_key->ip.frag)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_KEY_ATTR_TCP:
|
|
|
|
if (flow_key->ip.proto != IPPROTO_TCP)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_KEY_ATTR_UDP:
|
|
|
|
if (flow_key->ip.proto != IPPROTO_UDP)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!flow_key->ipv4.tp.src || !flow_key->ipv4.tp.dst)
|
|
|
|
return -EINVAL;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_userspace(const struct nlattr *attr)
|
|
|
|
{
|
|
|
|
static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
|
|
|
|
[OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
|
|
|
|
[OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_U64 },
|
|
|
|
};
|
|
|
|
struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
|
|
|
|
int error;
|
|
|
|
|
|
|
|
error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
|
|
|
|
attr, userspace_policy);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
if (!a[OVS_USERSPACE_ATTR_PID] ||
|
|
|
|
!nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_actions(const struct nlattr *attr,
|
|
|
|
const struct sw_flow_key *key, int depth)
|
|
|
|
{
|
|
|
|
const struct nlattr *a;
|
|
|
|
int rem, err;
|
|
|
|
|
|
|
|
if (depth >= SAMPLE_ACTION_DEPTH)
|
|
|
|
return -EOVERFLOW;
|
|
|
|
|
|
|
|
nla_for_each_nested(a, attr, rem) {
|
|
|
|
/* Expected argument lengths, (u32)-1 for variable length. */
|
|
|
|
static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
|
|
|
|
[OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
|
|
|
|
[OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
|
|
|
|
[OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
|
|
|
|
[OVS_ACTION_ATTR_POP_VLAN] = 0,
|
|
|
|
[OVS_ACTION_ATTR_SET] = (u32)-1,
|
|
|
|
[OVS_ACTION_ATTR_SAMPLE] = (u32)-1
|
|
|
|
};
|
|
|
|
const struct ovs_action_push_vlan *vlan;
|
|
|
|
int type = nla_type(a);
|
|
|
|
|
|
|
|
if (type > OVS_ACTION_ATTR_MAX ||
|
|
|
|
(action_lens[type] != nla_len(a) &&
|
|
|
|
action_lens[type] != (u32)-1))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case OVS_ACTION_ATTR_UNSPEC:
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_USERSPACE:
|
|
|
|
err = validate_userspace(a);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_OUTPUT:
|
|
|
|
if (nla_get_u32(a) >= DP_MAX_PORTS)
|
|
|
|
return -EINVAL;
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_POP_VLAN:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_PUSH_VLAN:
|
|
|
|
vlan = nla_data(a);
|
|
|
|
if (vlan->vlan_tpid != htons(ETH_P_8021Q))
|
|
|
|
return -EINVAL;
|
|
|
|
if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
|
|
|
|
return -EINVAL;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_SET:
|
|
|
|
err = validate_set(a, key);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case OVS_ACTION_ATTR_SAMPLE:
|
|
|
|
err = validate_sample(a, key, depth);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rem > 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void clear_stats(struct sw_flow *flow)
|
|
|
|
{
|
|
|
|
flow->used = 0;
|
|
|
|
flow->tcp_flags = 0;
|
|
|
|
flow->packet_count = 0;
|
|
|
|
flow->byte_count = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_packet_cmd_execute(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
|
|
struct ovs_header *ovs_header = info->userhdr;
|
|
|
|
struct nlattr **a = info->attrs;
|
|
|
|
struct sw_flow_actions *acts;
|
|
|
|
struct sk_buff *packet;
|
|
|
|
struct sw_flow *flow;
|
|
|
|
struct datapath *dp;
|
|
|
|
struct ethhdr *eth;
|
|
|
|
int len;
|
|
|
|
int err;
|
|
|
|
int key_len;
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if (!a[OVS_PACKET_ATTR_PACKET] || !a[OVS_PACKET_ATTR_KEY] ||
|
|
|
|
!a[OVS_PACKET_ATTR_ACTIONS] ||
|
|
|
|
nla_len(a[OVS_PACKET_ATTR_PACKET]) < ETH_HLEN)
|
|
|
|
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);
|
|
|
|
|
|
|
|
memcpy(__skb_put(packet, len), nla_data(a[OVS_PACKET_ATTR_PACKET]), len);
|
|
|
|
|
|
|
|
skb_reset_mac_header(packet);
|
|
|
|
eth = eth_hdr(packet);
|
|
|
|
|
|
|
|
/* Normally, setting the skb 'protocol' field would be handled by a
|
|
|
|
* call to eth_type_trans(), but it assumes there's a sending
|
|
|
|
* device, which we may not have. */
|
|
|
|
if (ntohs(eth->h_proto) >= 1536)
|
|
|
|
packet->protocol = eth->h_proto;
|
|
|
|
else
|
|
|
|
packet->protocol = htons(ETH_P_802_2);
|
|
|
|
|
|
|
|
/* 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_extract(packet, -1, &flow->key, &key_len);
|
|
|
|
if (err)
|
|
|
|
goto err_flow_free;
|
|
|
|
|
|
|
|
err = ovs_flow_metadata_from_nlattrs(&flow->key.phy.priority,
|
|
|
|
&flow->key.phy.in_port,
|
|
|
|
a[OVS_PACKET_ATTR_KEY]);
|
|
|
|
if (err)
|
|
|
|
goto err_flow_free;
|
|
|
|
|
|
|
|
err = validate_actions(a[OVS_PACKET_ATTR_ACTIONS], &flow->key, 0);
|
|
|
|
if (err)
|
|
|
|
goto err_flow_free;
|
|
|
|
|
|
|
|
flow->hash = ovs_flow_hash(&flow->key, key_len);
|
|
|
|
|
|
|
|
acts = ovs_flow_actions_alloc(a[OVS_PACKET_ATTR_ACTIONS]);
|
|
|
|
err = PTR_ERR(acts);
|
|
|
|
if (IS_ERR(acts))
|
|
|
|
goto err_flow_free;
|
|
|
|
rcu_assign_pointer(flow->sf_acts, acts);
|
|
|
|
|
|
|
|
OVS_CB(packet)->flow = flow;
|
|
|
|
packet->priority = flow->key.phy.priority;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
err = -ENODEV;
|
|
|
|
if (!dp)
|
|
|
|
goto err_unlock;
|
|
|
|
|
|
|
|
local_bh_disable();
|
|
|
|
err = ovs_execute_actions(dp, packet);
|
|
|
|
local_bh_enable();
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
ovs_flow_free(flow);
|
|
|
|
return err;
|
|
|
|
|
|
|
|
err_unlock:
|
|
|
|
rcu_read_unlock();
|
|
|
|
err_flow_free:
|
|
|
|
ovs_flow_free(flow);
|
|
|
|
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] = { .type = NLA_UNSPEC },
|
|
|
|
[OVS_PACKET_ATTR_KEY] = { .type = NLA_NESTED },
|
|
|
|
[OVS_PACKET_ATTR_ACTIONS] = { .type = NLA_NESTED },
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_ops dp_packet_genl_ops[] = {
|
|
|
|
{ .cmd = OVS_PACKET_CMD_EXECUTE,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = packet_policy,
|
|
|
|
.doit = ovs_packet_cmd_execute
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static void get_dp_stats(struct datapath *dp, struct ovs_dp_stats *stats)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct flow_table *table = genl_dereference(dp->table);
|
|
|
|
|
|
|
|
stats->n_flows = ovs_flow_tbl_count(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_bh(&percpu_stats->sync);
|
|
|
|
local_stats = *percpu_stats;
|
|
|
|
} while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start));
|
|
|
|
|
|
|
|
stats->n_hit += local_stats.n_hit;
|
|
|
|
stats->n_missed += local_stats.n_missed;
|
|
|
|
stats->n_lost += local_stats.n_lost;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct nla_policy flow_policy[OVS_FLOW_ATTR_MAX + 1] = {
|
|
|
|
[OVS_FLOW_ATTR_KEY] = { .type = NLA_NESTED },
|
|
|
|
[OVS_FLOW_ATTR_ACTIONS] = { .type = NLA_NESTED },
|
|
|
|
[OVS_FLOW_ATTR_CLEAR] = { .type = NLA_FLAG },
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_family dp_flow_genl_family = {
|
|
|
|
.id = GENL_ID_GENERATE,
|
|
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
|
|
.name = OVS_FLOW_FAMILY,
|
|
|
|
.version = OVS_FLOW_VERSION,
|
|
|
|
.maxattr = OVS_FLOW_ATTR_MAX
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_multicast_group ovs_dp_flow_multicast_group = {
|
|
|
|
.name = OVS_FLOW_MCGROUP
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Called with genl_lock. */
|
|
|
|
static int ovs_flow_cmd_fill_info(struct sw_flow *flow, struct datapath *dp,
|
|
|
|
struct sk_buff *skb, u32 pid,
|
|
|
|
u32 seq, u32 flags, u8 cmd)
|
|
|
|
{
|
|
|
|
const int skb_orig_len = skb->len;
|
|
|
|
const struct sw_flow_actions *sf_acts;
|
|
|
|
struct ovs_flow_stats stats;
|
|
|
|
struct ovs_header *ovs_header;
|
|
|
|
struct nlattr *nla;
|
|
|
|
unsigned long used;
|
|
|
|
u8 tcp_flags;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
sf_acts = rcu_dereference_protected(flow->sf_acts,
|
|
|
|
lockdep_genl_is_held());
|
|
|
|
|
|
|
|
ovs_header = genlmsg_put(skb, pid, seq, &dp_flow_genl_family, flags, cmd);
|
|
|
|
if (!ovs_header)
|
|
|
|
return -EMSGSIZE;
|
|
|
|
|
|
|
|
ovs_header->dp_ifindex = get_dpifindex(dp);
|
|
|
|
|
|
|
|
nla = nla_nest_start(skb, OVS_FLOW_ATTR_KEY);
|
|
|
|
if (!nla)
|
|
|
|
goto nla_put_failure;
|
|
|
|
err = ovs_flow_to_nlattrs(&flow->key, skb);
|
|
|
|
if (err)
|
|
|
|
goto error;
|
|
|
|
nla_nest_end(skb, nla);
|
|
|
|
|
|
|
|
spin_lock_bh(&flow->lock);
|
|
|
|
used = flow->used;
|
|
|
|
stats.n_packets = flow->packet_count;
|
|
|
|
stats.n_bytes = flow->byte_count;
|
|
|
|
tcp_flags = flow->tcp_flags;
|
|
|
|
spin_unlock_bh(&flow->lock);
|
|
|
|
|
|
|
|
if (used)
|
|
|
|
NLA_PUT_U64(skb, OVS_FLOW_ATTR_USED, ovs_flow_used_time(used));
|
|
|
|
|
|
|
|
if (stats.n_packets)
|
|
|
|
NLA_PUT(skb, OVS_FLOW_ATTR_STATS,
|
|
|
|
sizeof(struct ovs_flow_stats), &stats);
|
|
|
|
|
|
|
|
if (tcp_flags)
|
|
|
|
NLA_PUT_U8(skb, OVS_FLOW_ATTR_TCP_FLAGS, tcp_flags);
|
|
|
|
|
|
|
|
/* 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.
|
|
|
|
*/
|
|
|
|
err = nla_put(skb, OVS_FLOW_ATTR_ACTIONS, sf_acts->actions_len,
|
|
|
|
sf_acts->actions);
|
|
|
|
if (err < 0 && skb_orig_len)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
return genlmsg_end(skb, ovs_header);
|
|
|
|
|
|
|
|
nla_put_failure:
|
|
|
|
err = -EMSGSIZE;
|
|
|
|
error:
|
|
|
|
genlmsg_cancel(skb, ovs_header);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
|
|
|
|
{
|
|
|
|
const struct sw_flow_actions *sf_acts;
|
|
|
|
int len;
|
|
|
|
|
|
|
|
sf_acts = rcu_dereference_protected(flow->sf_acts,
|
|
|
|
lockdep_genl_is_held());
|
|
|
|
|
|
|
|
/* OVS_FLOW_ATTR_KEY */
|
|
|
|
len = nla_total_size(FLOW_BUFSIZE);
|
|
|
|
/* OVS_FLOW_ATTR_ACTIONS */
|
|
|
|
len += nla_total_size(sf_acts->actions_len);
|
|
|
|
/* OVS_FLOW_ATTR_STATS */
|
|
|
|
len += nla_total_size(sizeof(struct ovs_flow_stats));
|
|
|
|
/* OVS_FLOW_ATTR_TCP_FLAGS */
|
|
|
|
len += nla_total_size(1);
|
|
|
|
/* OVS_FLOW_ATTR_USED */
|
|
|
|
len += nla_total_size(8);
|
|
|
|
|
|
|
|
len += NLMSG_ALIGN(sizeof(struct ovs_header));
|
|
|
|
|
|
|
|
return genlmsg_new(len, GFP_KERNEL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
|
|
|
|
struct datapath *dp,
|
|
|
|
u32 pid, u32 seq, u8 cmd)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
skb = ovs_flow_cmd_alloc_info(flow);
|
|
|
|
if (!skb)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
retval = ovs_flow_cmd_fill_info(flow, dp, skb, pid, seq, 0, cmd);
|
|
|
|
BUG_ON(retval < 0);
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_flow_cmd_new_or_set(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
|
|
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;
|
|
|
|
struct datapath *dp;
|
|
|
|
struct flow_table *table;
|
|
|
|
int error;
|
|
|
|
int key_len;
|
|
|
|
|
|
|
|
/* Extract key. */
|
|
|
|
error = -EINVAL;
|
|
|
|
if (!a[OVS_FLOW_ATTR_KEY])
|
|
|
|
goto error;
|
|
|
|
error = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
|
|
|
|
if (error)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* Validate actions. */
|
|
|
|
if (a[OVS_FLOW_ATTR_ACTIONS]) {
|
|
|
|
error = validate_actions(a[OVS_FLOW_ATTR_ACTIONS], &key, 0);
|
|
|
|
if (error)
|
|
|
|
goto error;
|
|
|
|
} else if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW) {
|
|
|
|
error = -EINVAL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
error = -ENODEV;
|
|
|
|
if (!dp)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
table = genl_dereference(dp->table);
|
|
|
|
flow = ovs_flow_tbl_lookup(table, &key, key_len);
|
|
|
|
if (!flow) {
|
|
|
|
struct sw_flow_actions *acts;
|
|
|
|
|
|
|
|
/* Bail out if we're not allowed to create a new flow. */
|
|
|
|
error = -ENOENT;
|
|
|
|
if (info->genlhdr->cmd == OVS_FLOW_CMD_SET)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* Expand table, if necessary, to make room. */
|
|
|
|
if (ovs_flow_tbl_need_to_expand(table)) {
|
|
|
|
struct flow_table *new_table;
|
|
|
|
|
|
|
|
new_table = ovs_flow_tbl_expand(table);
|
|
|
|
if (!IS_ERR(new_table)) {
|
|
|
|
rcu_assign_pointer(dp->table, new_table);
|
|
|
|
ovs_flow_tbl_deferred_destroy(table);
|
|
|
|
table = genl_dereference(dp->table);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Allocate flow. */
|
|
|
|
flow = ovs_flow_alloc();
|
|
|
|
if (IS_ERR(flow)) {
|
|
|
|
error = PTR_ERR(flow);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
flow->key = key;
|
|
|
|
clear_stats(flow);
|
|
|
|
|
|
|
|
/* Obtain actions. */
|
|
|
|
acts = ovs_flow_actions_alloc(a[OVS_FLOW_ATTR_ACTIONS]);
|
|
|
|
error = PTR_ERR(acts);
|
|
|
|
if (IS_ERR(acts))
|
|
|
|
goto error_free_flow;
|
|
|
|
rcu_assign_pointer(flow->sf_acts, acts);
|
|
|
|
|
|
|
|
/* Put flow in bucket. */
|
|
|
|
flow->hash = ovs_flow_hash(&key, key_len);
|
|
|
|
ovs_flow_tbl_insert(table, flow);
|
|
|
|
|
|
|
|
reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
|
|
|
|
info->snd_seq,
|
|
|
|
OVS_FLOW_CMD_NEW);
|
|
|
|
} else {
|
|
|
|
/* We found a matching flow. */
|
|
|
|
struct sw_flow_actions *old_acts;
|
|
|
|
struct nlattr *acts_attrs;
|
|
|
|
|
|
|
|
/* 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.
|
|
|
|
*/
|
|
|
|
error = -EEXIST;
|
|
|
|
if (info->genlhdr->cmd == OVS_FLOW_CMD_NEW &&
|
|
|
|
info->nlhdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_EXCL))
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
/* Update actions. */
|
|
|
|
old_acts = rcu_dereference_protected(flow->sf_acts,
|
|
|
|
lockdep_genl_is_held());
|
|
|
|
acts_attrs = a[OVS_FLOW_ATTR_ACTIONS];
|
|
|
|
if (acts_attrs &&
|
|
|
|
(old_acts->actions_len != nla_len(acts_attrs) ||
|
|
|
|
memcmp(old_acts->actions, nla_data(acts_attrs),
|
|
|
|
old_acts->actions_len))) {
|
|
|
|
struct sw_flow_actions *new_acts;
|
|
|
|
|
|
|
|
new_acts = ovs_flow_actions_alloc(acts_attrs);
|
|
|
|
error = PTR_ERR(new_acts);
|
|
|
|
if (IS_ERR(new_acts))
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
rcu_assign_pointer(flow->sf_acts, new_acts);
|
|
|
|
ovs_flow_deferred_free_acts(old_acts);
|
|
|
|
}
|
|
|
|
|
|
|
|
reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_FLOW_CMD_NEW);
|
|
|
|
|
|
|
|
/* Clear stats. */
|
|
|
|
if (a[OVS_FLOW_ATTR_CLEAR]) {
|
|
|
|
spin_lock_bh(&flow->lock);
|
|
|
|
clear_stats(flow);
|
|
|
|
spin_unlock_bh(&flow->lock);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!IS_ERR(reply))
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_flow_multicast_group.id, info->nlhdr,
|
|
|
|
GFP_KERNEL);
|
|
|
|
else
|
|
|
|
netlink_set_err(init_net.genl_sock, 0,
|
|
|
|
ovs_dp_flow_multicast_group.id, PTR_ERR(reply));
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_free_flow:
|
|
|
|
ovs_flow_free(flow);
|
|
|
|
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 sw_flow_key key;
|
|
|
|
struct sk_buff *reply;
|
|
|
|
struct sw_flow *flow;
|
|
|
|
struct datapath *dp;
|
|
|
|
struct flow_table *table;
|
|
|
|
int err;
|
|
|
|
int key_len;
|
|
|
|
|
|
|
|
if (!a[OVS_FLOW_ATTR_KEY])
|
|
|
|
return -EINVAL;
|
|
|
|
err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
table = genl_dereference(dp->table);
|
|
|
|
flow = ovs_flow_tbl_lookup(table, &key, key_len);
|
|
|
|
if (!flow)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
reply = ovs_flow_cmd_build_info(flow, dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_FLOW_CMD_NEW);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
return PTR_ERR(reply);
|
|
|
|
|
|
|
|
return genlmsg_reply(reply, info);
|
|
|
|
}
|
|
|
|
|
|
|
|
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 sw_flow_key key;
|
|
|
|
struct sk_buff *reply;
|
|
|
|
struct sw_flow *flow;
|
|
|
|
struct datapath *dp;
|
|
|
|
struct flow_table *table;
|
|
|
|
int err;
|
|
|
|
int key_len;
|
|
|
|
|
|
|
|
if (!a[OVS_FLOW_ATTR_KEY])
|
|
|
|
return flush_flows(ovs_header->dp_ifindex);
|
|
|
|
err = ovs_flow_from_nlattrs(&key, &key_len, a[OVS_FLOW_ATTR_KEY]);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
table = genl_dereference(dp->table);
|
|
|
|
flow = ovs_flow_tbl_lookup(table, &key, key_len);
|
|
|
|
if (!flow)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
reply = ovs_flow_cmd_alloc_info(flow);
|
|
|
|
if (!reply)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
ovs_flow_tbl_remove(table, flow);
|
|
|
|
|
|
|
|
err = ovs_flow_cmd_fill_info(flow, dp, reply, info->snd_pid,
|
|
|
|
info->snd_seq, 0, OVS_FLOW_CMD_DEL);
|
|
|
|
BUG_ON(err < 0);
|
|
|
|
|
|
|
|
ovs_flow_deferred_free(flow);
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_flow_multicast_group.id, info->nlhdr, GFP_KERNEL);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_flow_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
|
|
{
|
|
|
|
struct ovs_header *ovs_header = genlmsg_data(nlmsg_data(cb->nlh));
|
|
|
|
struct datapath *dp;
|
|
|
|
struct flow_table *table;
|
|
|
|
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
table = genl_dereference(dp->table);
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
struct sw_flow *flow;
|
|
|
|
u32 bucket, obj;
|
|
|
|
|
|
|
|
bucket = cb->args[0];
|
|
|
|
obj = cb->args[1];
|
|
|
|
flow = ovs_flow_tbl_next(table, &bucket, &obj);
|
|
|
|
if (!flow)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (ovs_flow_cmd_fill_info(flow, dp, skb,
|
|
|
|
NETLINK_CB(cb->skb).pid,
|
|
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
|
|
OVS_FLOW_CMD_NEW) < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
cb->args[0] = bucket;
|
|
|
|
cb->args[1] = obj;
|
|
|
|
}
|
|
|
|
return skb->len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct genl_ops dp_flow_genl_ops[] = {
|
|
|
|
{ .cmd = OVS_FLOW_CMD_NEW,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = flow_policy,
|
|
|
|
.doit = ovs_flow_cmd_new_or_set
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_FLOW_CMD_DEL,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = flow_policy,
|
|
|
|
.doit = ovs_flow_cmd_del
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_FLOW_CMD_GET,
|
|
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
|
|
.policy = flow_policy,
|
|
|
|
.doit = ovs_flow_cmd_get,
|
|
|
|
.dumpit = ovs_flow_cmd_dump
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_FLOW_CMD_SET,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = flow_policy,
|
|
|
|
.doit = ovs_flow_cmd_new_or_set,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
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 },
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_family dp_datapath_genl_family = {
|
|
|
|
.id = GENL_ID_GENERATE,
|
|
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
|
|
.name = OVS_DATAPATH_FAMILY,
|
|
|
|
.version = OVS_DATAPATH_VERSION,
|
|
|
|
.maxattr = OVS_DP_ATTR_MAX
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_multicast_group ovs_dp_datapath_multicast_group = {
|
|
|
|
.name = OVS_DATAPATH_MCGROUP
|
|
|
|
};
|
|
|
|
|
|
|
|
static int ovs_dp_cmd_fill_info(struct datapath *dp, struct sk_buff *skb,
|
|
|
|
u32 pid, u32 seq, u32 flags, u8 cmd)
|
|
|
|
{
|
|
|
|
struct ovs_header *ovs_header;
|
|
|
|
struct ovs_dp_stats dp_stats;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
ovs_header = genlmsg_put(skb, pid, seq, &dp_datapath_genl_family,
|
|
|
|
flags, cmd);
|
|
|
|
if (!ovs_header)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
ovs_header->dp_ifindex = get_dpifindex(dp);
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
err = nla_put_string(skb, OVS_DP_ATTR_NAME, ovs_dp_name(dp));
|
|
|
|
rcu_read_unlock();
|
|
|
|
if (err)
|
|
|
|
goto nla_put_failure;
|
|
|
|
|
|
|
|
get_dp_stats(dp, &dp_stats);
|
|
|
|
NLA_PUT(skb, OVS_DP_ATTR_STATS, sizeof(struct ovs_dp_stats), &dp_stats);
|
|
|
|
|
|
|
|
return genlmsg_end(skb, ovs_header);
|
|
|
|
|
|
|
|
nla_put_failure:
|
|
|
|
genlmsg_cancel(skb, ovs_header);
|
|
|
|
error:
|
|
|
|
return -EMSGSIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 pid,
|
|
|
|
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_dp_cmd_fill_info(dp, skb, pid, seq, 0, cmd);
|
|
|
|
if (retval < 0) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return ERR_PTR(retval);
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called with genl_mutex and optionally with RTNL lock also. */
|
|
|
|
static struct datapath *lookup_datapath(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(ovs_header->dp_ifindex);
|
|
|
|
else {
|
|
|
|
struct vport *vport;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
vport = ovs_vport_locate(nla_data(a[OVS_DP_ATTR_NAME]));
|
|
|
|
dp = vport && vport->port_no == OVSP_LOCAL ? vport->dp : NULL;
|
|
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
return dp ? dp : ERR_PTR(-ENODEV);
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if (!a[OVS_DP_ATTR_NAME] || !a[OVS_DP_ATTR_UPCALL_PID])
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
err = -ENODEV;
|
|
|
|
if (!try_module_get(THIS_MODULE))
|
|
|
|
goto err_unlock_rtnl;
|
|
|
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
|
|
|
|
if (dp == NULL)
|
|
|
|
goto err_put_module;
|
|
|
|
INIT_LIST_HEAD(&dp->port_list);
|
|
|
|
|
|
|
|
/* Allocate table. */
|
|
|
|
err = -ENOMEM;
|
|
|
|
rcu_assign_pointer(dp->table, ovs_flow_tbl_alloc(TBL_MIN_BUCKETS));
|
|
|
|
if (!dp->table)
|
|
|
|
goto err_free_dp;
|
|
|
|
|
|
|
|
dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
|
|
|
|
if (!dp->stats_percpu) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
goto err_destroy_table;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 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_pid = nla_get_u32(a[OVS_DP_ATTR_UPCALL_PID]);
|
|
|
|
|
|
|
|
vport = new_vport(&parms);
|
|
|
|
if (IS_ERR(vport)) {
|
|
|
|
err = PTR_ERR(vport);
|
|
|
|
if (err == -EBUSY)
|
|
|
|
err = -EEXIST;
|
|
|
|
|
|
|
|
goto err_destroy_percpu;
|
|
|
|
}
|
|
|
|
|
|
|
|
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_DP_CMD_NEW);
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
goto err_destroy_local_port;
|
|
|
|
|
|
|
|
list_add_tail(&dp->list_node, &dps);
|
|
|
|
rtnl_unlock();
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_datapath_multicast_group.id, info->nlhdr,
|
|
|
|
GFP_KERNEL);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_destroy_local_port:
|
|
|
|
ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
|
|
|
|
err_destroy_percpu:
|
|
|
|
free_percpu(dp->stats_percpu);
|
|
|
|
err_destroy_table:
|
|
|
|
ovs_flow_tbl_destroy(genl_dereference(dp->table));
|
|
|
|
err_free_dp:
|
|
|
|
kfree(dp);
|
|
|
|
err_put_module:
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
err_unlock_rtnl:
|
|
|
|
rtnl_unlock();
|
|
|
|
err:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_dp_cmd_del(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
|
|
struct vport *vport, *next_vport;
|
|
|
|
struct sk_buff *reply;
|
|
|
|
struct datapath *dp;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
dp = lookup_datapath(info->userhdr, info->attrs);
|
|
|
|
err = PTR_ERR(dp);
|
|
|
|
if (IS_ERR(dp))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_DP_CMD_DEL);
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(vport, next_vport, &dp->port_list, node)
|
|
|
|
if (vport->port_no != OVSP_LOCAL)
|
|
|
|
ovs_dp_detach_port(vport);
|
|
|
|
|
|
|
|
list_del(&dp->list_node);
|
|
|
|
ovs_dp_detach_port(rtnl_dereference(dp->ports[OVSP_LOCAL]));
|
|
|
|
|
|
|
|
/* rtnl_unlock() will wait until all the references to devices that
|
|
|
|
* are pending unregistration have been dropped. We do it here to
|
|
|
|
* ensure that any internal devices (which contain DP pointers) are
|
|
|
|
* fully destroyed before freeing the datapath.
|
|
|
|
*/
|
|
|
|
rtnl_unlock();
|
|
|
|
|
|
|
|
call_rcu(&dp->rcu, destroy_dp_rcu);
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_datapath_multicast_group.id, info->nlhdr,
|
|
|
|
GFP_KERNEL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
exit_unlock:
|
|
|
|
rtnl_unlock();
|
|
|
|
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;
|
|
|
|
|
|
|
|
dp = lookup_datapath(info->userhdr, info->attrs);
|
|
|
|
if (IS_ERR(dp))
|
|
|
|
return PTR_ERR(dp);
|
|
|
|
|
|
|
|
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_DP_CMD_NEW);
|
|
|
|
if (IS_ERR(reply)) {
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
netlink_set_err(init_net.genl_sock, 0,
|
|
|
|
ovs_dp_datapath_multicast_group.id, err);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_datapath_multicast_group.id, info->nlhdr,
|
|
|
|
GFP_KERNEL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_dp_cmd_get(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
|
|
struct sk_buff *reply;
|
|
|
|
struct datapath *dp;
|
|
|
|
|
|
|
|
dp = lookup_datapath(info->userhdr, info->attrs);
|
|
|
|
if (IS_ERR(dp))
|
|
|
|
return PTR_ERR(dp);
|
|
|
|
|
|
|
|
reply = ovs_dp_cmd_build_info(dp, info->snd_pid,
|
|
|
|
info->snd_seq, OVS_DP_CMD_NEW);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
return PTR_ERR(reply);
|
|
|
|
|
|
|
|
return genlmsg_reply(reply, info);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_dp_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
|
|
{
|
|
|
|
struct datapath *dp;
|
|
|
|
int skip = cb->args[0];
|
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
list_for_each_entry(dp, &dps, list_node) {
|
2012-01-17 14:33:39 +01:00
|
|
|
if (i >= skip &&
|
|
|
|
ovs_dp_cmd_fill_info(dp, skb, NETLINK_CB(cb->skb).pid,
|
2011-10-26 04:26:31 +02:00
|
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
|
|
OVS_DP_CMD_NEW) < 0)
|
|
|
|
break;
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
|
|
|
|
cb->args[0] = i;
|
|
|
|
|
|
|
|
return skb->len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct genl_ops dp_datapath_genl_ops[] = {
|
|
|
|
{ .cmd = OVS_DP_CMD_NEW,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = datapath_policy,
|
|
|
|
.doit = ovs_dp_cmd_new
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_DP_CMD_DEL,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = datapath_policy,
|
|
|
|
.doit = ovs_dp_cmd_del
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_DP_CMD_GET,
|
|
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
|
|
.policy = datapath_policy,
|
|
|
|
.doit = ovs_dp_cmd_get,
|
|
|
|
.dumpit = ovs_dp_cmd_dump
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_DP_CMD_SET,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = datapath_policy,
|
|
|
|
.doit = ovs_dp_cmd_set,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
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_U32 },
|
|
|
|
[OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct genl_family dp_vport_genl_family = {
|
|
|
|
.id = GENL_ID_GENERATE,
|
|
|
|
.hdrsize = sizeof(struct ovs_header),
|
|
|
|
.name = OVS_VPORT_FAMILY,
|
|
|
|
.version = OVS_VPORT_VERSION,
|
|
|
|
.maxattr = OVS_VPORT_ATTR_MAX
|
|
|
|
};
|
|
|
|
|
|
|
|
struct genl_multicast_group ovs_dp_vport_multicast_group = {
|
|
|
|
.name = OVS_VPORT_MCGROUP
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Called with RTNL lock or RCU read lock. */
|
|
|
|
static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
|
|
|
|
u32 pid, u32 seq, u32 flags, u8 cmd)
|
|
|
|
{
|
|
|
|
struct ovs_header *ovs_header;
|
|
|
|
struct ovs_vport_stats vport_stats;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
ovs_header = genlmsg_put(skb, pid, seq, &dp_vport_genl_family,
|
|
|
|
flags, cmd);
|
|
|
|
if (!ovs_header)
|
|
|
|
return -EMSGSIZE;
|
|
|
|
|
|
|
|
ovs_header->dp_ifindex = get_dpifindex(vport->dp);
|
|
|
|
|
|
|
|
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, vport->ops->get_name(vport));
|
|
|
|
NLA_PUT_U32(skb, OVS_VPORT_ATTR_UPCALL_PID, vport->upcall_pid);
|
|
|
|
|
|
|
|
ovs_vport_get_stats(vport, &vport_stats);
|
|
|
|
NLA_PUT(skb, OVS_VPORT_ATTR_STATS, sizeof(struct ovs_vport_stats),
|
|
|
|
&vport_stats);
|
|
|
|
|
|
|
|
err = ovs_vport_get_options(vport, skb);
|
|
|
|
if (err == -EMSGSIZE)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
return genlmsg_end(skb, ovs_header);
|
|
|
|
|
|
|
|
nla_put_failure:
|
|
|
|
err = -EMSGSIZE;
|
|
|
|
error:
|
|
|
|
genlmsg_cancel(skb, ovs_header);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called with RTNL lock or RCU read lock. */
|
|
|
|
struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
|
|
|
|
u32 seq, u8 cmd)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
retval = ovs_vport_cmd_fill_info(vport, skb, pid, seq, 0, cmd);
|
|
|
|
if (retval < 0) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return ERR_PTR(retval);
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called with RTNL lock or RCU read lock. */
|
|
|
|
static struct vport *lookup_vport(struct ovs_header *ovs_header,
|
|
|
|
struct nlattr *a[OVS_VPORT_ATTR_MAX + 1])
|
|
|
|
{
|
|
|
|
struct datapath *dp;
|
|
|
|
struct vport *vport;
|
|
|
|
|
|
|
|
if (a[OVS_VPORT_ATTR_NAME]) {
|
|
|
|
vport = ovs_vport_locate(nla_data(a[OVS_VPORT_ATTR_NAME]));
|
|
|
|
if (!vport)
|
|
|
|
return ERR_PTR(-ENODEV);
|
2012-03-07 00:04:04 +01:00
|
|
|
if (ovs_header->dp_ifindex &&
|
|
|
|
ovs_header->dp_ifindex != get_dpifindex(vport->dp))
|
|
|
|
return ERR_PTR(-ENODEV);
|
2011-10-26 04:26:31 +02:00
|
|
|
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(ovs_header->dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
|
|
|
|
vport = rcu_dereference_rtnl(dp->ports[port_no]);
|
|
|
|
if (!vport)
|
|
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
return vport;
|
|
|
|
} else
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
u32 port_no;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||
|
|
|
|
!a[OVS_VPORT_ATTR_UPCALL_PID])
|
|
|
|
goto exit;
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
err = -ENODEV;
|
|
|
|
if (!dp)
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
if (a[OVS_VPORT_ATTR_PORT_NO]) {
|
|
|
|
port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);
|
|
|
|
|
|
|
|
err = -EFBIG;
|
|
|
|
if (port_no >= DP_MAX_PORTS)
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
vport = rtnl_dereference(dp->ports[port_no]);
|
|
|
|
err = -EBUSY;
|
|
|
|
if (vport)
|
|
|
|
goto exit_unlock;
|
|
|
|
} else {
|
|
|
|
for (port_no = 1; ; port_no++) {
|
|
|
|
if (port_no >= DP_MAX_PORTS) {
|
|
|
|
err = -EFBIG;
|
|
|
|
goto exit_unlock;
|
|
|
|
}
|
|
|
|
vport = rtnl_dereference(dp->ports[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_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
|
|
|
|
|
|
|
|
vport = new_vport(&parms);
|
|
|
|
err = PTR_ERR(vport);
|
|
|
|
if (IS_ERR(vport))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
|
|
|
|
OVS_VPORT_CMD_NEW);
|
|
|
|
if (IS_ERR(reply)) {
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
ovs_dp_detach_port(vport);
|
|
|
|
goto exit_unlock;
|
|
|
|
}
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
|
|
|
|
|
|
|
|
exit_unlock:
|
|
|
|
rtnl_unlock();
|
|
|
|
exit:
|
|
|
|
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;
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
vport = lookup_vport(info->userhdr, a);
|
|
|
|
err = PTR_ERR(vport);
|
|
|
|
if (IS_ERR(vport))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
if (a[OVS_VPORT_ATTR_TYPE] &&
|
|
|
|
nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type)
|
|
|
|
err = -EINVAL;
|
|
|
|
|
|
|
|
if (!err && a[OVS_VPORT_ATTR_OPTIONS])
|
|
|
|
err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]);
|
2012-04-09 21:12:12 +02:00
|
|
|
if (err)
|
|
|
|
goto exit_unlock;
|
|
|
|
if (a[OVS_VPORT_ATTR_UPCALL_PID])
|
2011-10-26 04:26:31 +02:00
|
|
|
vport->upcall_pid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);
|
|
|
|
|
|
|
|
reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
|
|
|
|
OVS_VPORT_CMD_NEW);
|
|
|
|
if (IS_ERR(reply)) {
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
netlink_set_err(init_net.genl_sock, 0,
|
|
|
|
ovs_dp_vport_multicast_group.id, err);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
|
|
|
|
|
|
|
|
exit_unlock:
|
|
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ovs_vport_cmd_del(struct sk_buff *skb, struct genl_info *info)
|
|
|
|
{
|
|
|
|
struct nlattr **a = info->attrs;
|
|
|
|
struct sk_buff *reply;
|
|
|
|
struct vport *vport;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
rtnl_lock();
|
|
|
|
vport = lookup_vport(info->userhdr, a);
|
|
|
|
err = PTR_ERR(vport);
|
|
|
|
if (IS_ERR(vport))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
if (vport->port_no == OVSP_LOCAL) {
|
|
|
|
err = -EINVAL;
|
|
|
|
goto exit_unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
|
|
|
|
OVS_VPORT_CMD_DEL);
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
ovs_dp_detach_port(vport);
|
|
|
|
|
|
|
|
genl_notify(reply, genl_info_net(info), info->snd_pid,
|
|
|
|
ovs_dp_vport_multicast_group.id, info->nlhdr, GFP_KERNEL);
|
|
|
|
|
|
|
|
exit_unlock:
|
|
|
|
rtnl_unlock();
|
|
|
|
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;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
vport = lookup_vport(ovs_header, a);
|
|
|
|
err = PTR_ERR(vport);
|
|
|
|
if (IS_ERR(vport))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
reply = ovs_vport_cmd_build_info(vport, info->snd_pid, info->snd_seq,
|
|
|
|
OVS_VPORT_CMD_NEW);
|
|
|
|
err = PTR_ERR(reply);
|
|
|
|
if (IS_ERR(reply))
|
|
|
|
goto exit_unlock;
|
|
|
|
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
return genlmsg_reply(reply, info);
|
|
|
|
|
|
|
|
exit_unlock:
|
|
|
|
rcu_read_unlock();
|
|
|
|
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;
|
|
|
|
u32 port_no;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
dp = get_dp(ovs_header->dp_ifindex);
|
|
|
|
if (!dp)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
for (port_no = cb->args[0]; port_no < DP_MAX_PORTS; port_no++) {
|
|
|
|
struct vport *vport;
|
|
|
|
|
|
|
|
vport = rcu_dereference(dp->ports[port_no]);
|
|
|
|
if (!vport)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (ovs_vport_cmd_fill_info(vport, skb, NETLINK_CB(cb->skb).pid,
|
|
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
|
|
OVS_VPORT_CMD_NEW) < 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
cb->args[0] = port_no;
|
|
|
|
retval = skb->len;
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rehash_flow_table(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct datapath *dp;
|
|
|
|
|
|
|
|
genl_lock();
|
|
|
|
|
|
|
|
list_for_each_entry(dp, &dps, list_node) {
|
|
|
|
struct flow_table *old_table = genl_dereference(dp->table);
|
|
|
|
struct flow_table *new_table;
|
|
|
|
|
|
|
|
new_table = ovs_flow_tbl_rehash(old_table);
|
|
|
|
if (!IS_ERR(new_table)) {
|
|
|
|
rcu_assign_pointer(dp->table, new_table);
|
|
|
|
ovs_flow_tbl_deferred_destroy(old_table);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
genl_unlock();
|
|
|
|
|
|
|
|
schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct genl_ops dp_vport_genl_ops[] = {
|
|
|
|
{ .cmd = OVS_VPORT_CMD_NEW,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = vport_policy,
|
|
|
|
.doit = ovs_vport_cmd_new
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_VPORT_CMD_DEL,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = vport_policy,
|
|
|
|
.doit = ovs_vport_cmd_del
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_VPORT_CMD_GET,
|
|
|
|
.flags = 0, /* OK for unprivileged users. */
|
|
|
|
.policy = vport_policy,
|
|
|
|
.doit = ovs_vport_cmd_get,
|
|
|
|
.dumpit = ovs_vport_cmd_dump
|
|
|
|
},
|
|
|
|
{ .cmd = OVS_VPORT_CMD_SET,
|
|
|
|
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
|
|
|
|
.policy = vport_policy,
|
|
|
|
.doit = ovs_vport_cmd_set,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
struct genl_family_and_ops {
|
|
|
|
struct genl_family *family;
|
|
|
|
struct genl_ops *ops;
|
|
|
|
int n_ops;
|
|
|
|
struct genl_multicast_group *group;
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct genl_family_and_ops dp_genl_families[] = {
|
|
|
|
{ &dp_datapath_genl_family,
|
|
|
|
dp_datapath_genl_ops, ARRAY_SIZE(dp_datapath_genl_ops),
|
|
|
|
&ovs_dp_datapath_multicast_group },
|
|
|
|
{ &dp_vport_genl_family,
|
|
|
|
dp_vport_genl_ops, ARRAY_SIZE(dp_vport_genl_ops),
|
|
|
|
&ovs_dp_vport_multicast_group },
|
|
|
|
{ &dp_flow_genl_family,
|
|
|
|
dp_flow_genl_ops, ARRAY_SIZE(dp_flow_genl_ops),
|
|
|
|
&ovs_dp_flow_multicast_group },
|
|
|
|
{ &dp_packet_genl_family,
|
|
|
|
dp_packet_genl_ops, ARRAY_SIZE(dp_packet_genl_ops),
|
|
|
|
NULL },
|
|
|
|
};
|
|
|
|
|
|
|
|
static void dp_unregister_genl(int n_families)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < n_families; i++)
|
|
|
|
genl_unregister_family(dp_genl_families[i].family);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dp_register_genl(void)
|
|
|
|
{
|
|
|
|
int n_registered;
|
|
|
|
int err;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
n_registered = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dp_genl_families); i++) {
|
|
|
|
const struct genl_family_and_ops *f = &dp_genl_families[i];
|
|
|
|
|
|
|
|
err = genl_register_family_with_ops(f->family, f->ops,
|
|
|
|
f->n_ops);
|
|
|
|
if (err)
|
|
|
|
goto error;
|
|
|
|
n_registered++;
|
|
|
|
|
|
|
|
if (f->group) {
|
|
|
|
err = genl_register_mc_group(f->family, f->group);
|
|
|
|
if (err)
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error:
|
|
|
|
dp_unregister_genl(n_registered);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init dp_init(void)
|
|
|
|
{
|
|
|
|
struct sk_buff *dummy_skb;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
BUILD_BUG_ON(sizeof(struct ovs_skb_cb) > sizeof(dummy_skb->cb));
|
|
|
|
|
|
|
|
pr_info("Open vSwitch switching datapath\n");
|
|
|
|
|
|
|
|
err = ovs_flow_init();
|
|
|
|
if (err)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
err = ovs_vport_init();
|
|
|
|
if (err)
|
|
|
|
goto error_flow_exit;
|
|
|
|
|
|
|
|
err = register_netdevice_notifier(&ovs_dp_device_notifier);
|
|
|
|
if (err)
|
|
|
|
goto error_vport_exit;
|
|
|
|
|
|
|
|
err = dp_register_genl();
|
|
|
|
if (err < 0)
|
|
|
|
goto error_unreg_notifier;
|
|
|
|
|
|
|
|
schedule_delayed_work(&rehash_flow_wq, REHASH_FLOW_INTERVAL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_unreg_notifier:
|
|
|
|
unregister_netdevice_notifier(&ovs_dp_device_notifier);
|
|
|
|
error_vport_exit:
|
|
|
|
ovs_vport_exit();
|
|
|
|
error_flow_exit:
|
|
|
|
ovs_flow_exit();
|
|
|
|
error:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dp_cleanup(void)
|
|
|
|
{
|
|
|
|
cancel_delayed_work_sync(&rehash_flow_wq);
|
|
|
|
rcu_barrier();
|
|
|
|
dp_unregister_genl(ARRAY_SIZE(dp_genl_families));
|
|
|
|
unregister_netdevice_notifier(&ovs_dp_device_notifier);
|
|
|
|
ovs_vport_exit();
|
|
|
|
ovs_flow_exit();
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(dp_init);
|
|
|
|
module_exit(dp_cleanup);
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Open vSwitch switching datapath");
|
|
|
|
MODULE_LICENSE("GPL");
|