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2645 lines
64 KiB
2645 lines
64 KiB
// 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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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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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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|
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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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|
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unsigned int ovs_net_id __read_mostly; |
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|
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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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|
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static const struct nla_policy flow_policy[]; |
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|
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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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|
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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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|
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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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|
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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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|
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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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/** |
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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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|
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static DEFINE_MUTEX(ovs_mutex); |
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|
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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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|
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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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|
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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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|
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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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|
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static void ovs_dp_masks_rebalance(struct work_struct *work); |
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|
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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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|
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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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|
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rcu_read_lock(); |
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|
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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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|
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rcu_read_unlock(); |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* First drop references to device. */ |
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hlist_del_rcu(&p->dp_hash_node); |
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|
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/* Then destroy it. */ |
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ovs_vport_del(p); |
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} |
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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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u32 n_cache_hit; |
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int error; |
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|
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stats = this_cpu_ptr(dp->stats_percpu); |
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|
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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, &n_cache_hit); |
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if (unlikely(!flow)) { |
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struct dp_upcall_info upcall; |
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|
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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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|
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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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|
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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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stats->n_cache_hit += n_cache_hit; |
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u64_stats_update_end(&stats->syncp); |
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} |
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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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|
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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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|
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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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|
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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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|
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return err; |
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} |
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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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|
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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) { |
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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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} |
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return err; |
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} |
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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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{ |
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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 */ |
|
|
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/* OVS_PACKET_ATTR_USERDATA */ |
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if (upcall_info->userdata) |
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size += NLA_ALIGN(upcall_info->userdata->nla_len); |
|
|
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/* OVS_PACKET_ATTR_EGRESS_TUN_KEY */ |
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if (upcall_info->egress_tun_info) |
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size += nla_total_size(ovs_tun_key_attr_size()); |
|
|
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/* OVS_PACKET_ATTR_ACTIONS */ |
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if (upcall_info->actions_len) |
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size += nla_total_size(actions_attrlen); |
|
|
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/* OVS_PACKET_ATTR_MRU */ |
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if (upcall_info->mru) |
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size += nla_total_size(sizeof(upcall_info->mru)); |
|
|
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return size; |
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} |
|
|
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static void pad_packet(struct datapath *dp, struct sk_buff *skb) |
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{ |
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if (!(dp->user_features & OVS_DP_F_UNALIGNED)) { |
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size_t plen = NLA_ALIGN(skb->len) - skb->len; |
|
|
|
if (plen > 0) |
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skb_put_zero(skb, plen); |
|
} |
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} |
|
|
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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) |
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{ |
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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; |
|
|
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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_small_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, |
|
.small_ops = dp_packet_genl_ops, |
|
.n_small_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; |
|
mega_stats->n_cache_hit += local_stats.n_cache_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_small_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, |
|
.small_ops = dp_flow_genl_ops, |
|
.n_small_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 */ |
|
msgsize += nla_total_size(sizeof(u32)); /* OVS_DP_ATTR_MASKS_CACHE_SIZE */ |
|
|
|
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; |
|
|
|
if (nla_put_u32(skb, OVS_DP_ATTR_MASKS_CACHE_SIZE, |
|
ovs_flow_tbl_masks_cache_size(&dp->table))) |
|
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 |
|
} |
|
|
|
if (a[OVS_DP_ATTR_MASKS_CACHE_SIZE]) { |
|
int err; |
|
u32 cache_size; |
|
|
|
cache_size = nla_get_u32(a[OVS_DP_ATTR_MASKS_CACHE_SIZE]); |
|
err = ovs_flow_tbl_masks_cache_resize(&dp->table, cache_size); |
|
if (err) |
|
return err; |
|
} |
|
|
|
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]; |
|
|
|
/* So far only local changes have been made, now need the lock. */ |
|
ovs_lock(); |
|
|
|
err = ovs_dp_change(dp, a); |
|
if (err) |
|
goto err_unlock_and_destroy_meters; |
|
|
|
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); |
|
} |
|
|
|
goto err_unlock_and_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_unlock_and_destroy_meters: |
|
ovs_unlock(); |
|
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) |
|
{ |
|
struct flow_table *table = &dp->table; |
|
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)); |
|
|
|
/* Flush sw_flow in the tables. RCU cb only releases resource |
|
* such as dp, ports and tables. That may avoid some issues |
|
* such as RCU usage warning. |
|
*/ |
|
table_instance_flow_flush(table, ovsl_dereference(table->ti), |
|
ovsl_dereference(table->ufid_ti)); |
|
|
|
/* RCU destroy the ports, meters and flow tables. */ |
|
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 }, |
|
[OVS_DP_ATTR_MASKS_CACHE_SIZE] = NLA_POLICY_RANGE(NLA_U32, 0, |
|
PCPU_MIN_UNIT_SIZE / sizeof(struct mask_cache_entry)), |
|
}; |
|
|
|
static const struct genl_small_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, |
|
.small_ops = dp_datapath_genl_ops, |
|
.n_small_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 void ovs_dp_masks_rebalance(struct work_struct *work) |
|
{ |
|
struct ovs_net *ovs_net = container_of(work, struct ovs_net, |
|
masks_rebalance.work); |
|
struct datapath *dp; |
|
|
|
ovs_lock(); |
|
|
|
list_for_each_entry(dp, &ovs_net->dps, list_node) |
|
ovs_flow_masks_rebalance(&dp->table); |
|
|
|
ovs_unlock(); |
|
|
|
schedule_delayed_work(&ovs_net->masks_rebalance, |
|
msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); |
|
} |
|
|
|
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_small_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, |
|
.small_ops = dp_vport_genl_ops, |
|
.n_small_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); |
|
int err; |
|
|
|
INIT_LIST_HEAD(&ovs_net->dps); |
|
INIT_WORK(&ovs_net->dp_notify_work, ovs_dp_notify_wq); |
|
INIT_DELAYED_WORK(&ovs_net->masks_rebalance, ovs_dp_masks_rebalance); |
|
|
|
err = ovs_ct_init(net); |
|
if (err) |
|
return err; |
|
|
|
schedule_delayed_work(&ovs_net->masks_rebalance, |
|
msecs_to_jiffies(DP_MASKS_REBALANCE_INTERVAL)); |
|
return 0; |
|
} |
|
|
|
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_delayed_work_sync(&ovs_net->masks_rebalance); |
|
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);
|
|
|