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https://github.com/openvswitch/ovs
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fd016ae3fb
Poll-loop is the core to implement main loop. It should be available in libopenvswitch. Signed-off-by: Xiao Liang <shaw.leon@gmail.com> Signed-off-by: Ben Pfaff <blp@ovn.org>
6160 lines
192 KiB
C
6160 lines
192 KiB
C
/*
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* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2016, 2017 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "dpif-netdev.h"
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#ifdef DPDK_NETDEV
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#include <rte_cycles.h>
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#endif
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#include "bitmap.h"
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#include "cmap.h"
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#include "conntrack.h"
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#include "coverage.h"
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#include "ct-dpif.h"
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#include "csum.h"
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#include "dp-packet.h"
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#include "dpif.h"
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#include "dpif-provider.h"
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#include "dummy.h"
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#include "fat-rwlock.h"
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#include "flow.h"
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#include "hmapx.h"
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#include "id-pool.h"
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#include "latch.h"
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#include "netdev.h"
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#include "netdev-vport.h"
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#include "netlink.h"
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#include "odp-execute.h"
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#include "odp-util.h"
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#include "openvswitch/dynamic-string.h"
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#include "openvswitch/list.h"
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#include "openvswitch/match.h"
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#include "openvswitch/ofp-print.h"
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#include "openvswitch/ofp-util.h"
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#include "openvswitch/ofpbuf.h"
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#include "openvswitch/shash.h"
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#include "openvswitch/vlog.h"
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#include "ovs-numa.h"
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#include "ovs-rcu.h"
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#include "packets.h"
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#include "openvswitch/poll-loop.h"
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#include "pvector.h"
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#include "random.h"
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#include "seq.h"
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#include "smap.h"
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#include "sset.h"
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#include "timeval.h"
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#include "tnl-neigh-cache.h"
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#include "tnl-ports.h"
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#include "unixctl.h"
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#include "util.h"
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VLOG_DEFINE_THIS_MODULE(dpif_netdev);
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#define FLOW_DUMP_MAX_BATCH 50
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/* Use per thread recirc_depth to prevent recirculation loop. */
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#define MAX_RECIRC_DEPTH 5
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DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
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/* Configuration parameters. */
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enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
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enum { MAX_METERS = 65536 }; /* Maximum number of meters. */
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enum { MAX_BANDS = 8 }; /* Maximum number of bands / meter. */
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enum { N_METER_LOCKS = 64 }; /* Maximum number of meters. */
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/* Protects against changes to 'dp_netdevs'. */
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static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
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/* Contains all 'struct dp_netdev's. */
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static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
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= SHASH_INITIALIZER(&dp_netdevs);
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static struct vlog_rate_limit upcall_rl = VLOG_RATE_LIMIT_INIT(600, 600);
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#define DP_NETDEV_CS_SUPPORTED_MASK (CS_NEW | CS_ESTABLISHED | CS_RELATED \
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| CS_INVALID | CS_REPLY_DIR | CS_TRACKED \
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| CS_SRC_NAT | CS_DST_NAT)
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#define DP_NETDEV_CS_UNSUPPORTED_MASK (~(uint32_t)DP_NETDEV_CS_SUPPORTED_MASK)
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static struct odp_support dp_netdev_support = {
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.max_vlan_headers = SIZE_MAX,
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.max_mpls_depth = SIZE_MAX,
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.recirc = true,
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.ct_state = true,
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.ct_zone = true,
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.ct_mark = true,
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.ct_label = true,
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.ct_state_nat = true,
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.ct_orig_tuple = true,
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.ct_orig_tuple6 = true,
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};
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/* Stores a miniflow with inline values */
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struct netdev_flow_key {
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uint32_t hash; /* Hash function differs for different users. */
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uint32_t len; /* Length of the following miniflow (incl. map). */
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struct miniflow mf;
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uint64_t buf[FLOW_MAX_PACKET_U64S];
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};
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/* Exact match cache for frequently used flows
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*
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* The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
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* search its entries for a miniflow that matches exactly the miniflow of the
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* packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
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*
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* A cache entry holds a reference to its 'dp_netdev_flow'.
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*
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* A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
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* entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
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* them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
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* value is the index of a cache entry where the miniflow could be.
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*
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*
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* Thread-safety
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* =============
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*
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* Each pmd_thread has its own private exact match cache.
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* If dp_netdev_input is not called from a pmd thread, a mutex is used.
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*/
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#define EM_FLOW_HASH_SHIFT 13
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#define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
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#define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
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#define EM_FLOW_HASH_SEGS 2
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/* Default EMC insert probability is 1 / DEFAULT_EM_FLOW_INSERT_INV_PROB */
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#define DEFAULT_EM_FLOW_INSERT_INV_PROB 100
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#define DEFAULT_EM_FLOW_INSERT_MIN (UINT32_MAX / \
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DEFAULT_EM_FLOW_INSERT_INV_PROB)
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struct emc_entry {
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struct dp_netdev_flow *flow;
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struct netdev_flow_key key; /* key.hash used for emc hash value. */
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};
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struct emc_cache {
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struct emc_entry entries[EM_FLOW_HASH_ENTRIES];
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int sweep_idx; /* For emc_cache_slow_sweep(). */
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};
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/* Iterate in the exact match cache through every entry that might contain a
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* miniflow with hash 'HASH'. */
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#define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
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for (uint32_t i__ = 0, srch_hash__ = (HASH); \
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(CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
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i__ < EM_FLOW_HASH_SEGS; \
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i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
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/* Simple non-wildcarding single-priority classifier. */
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/* Time in ms between successive optimizations of the dpcls subtable vector */
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#define DPCLS_OPTIMIZATION_INTERVAL 1000
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/* Time in ms of the interval in which rxq processing cycles used in
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* rxq to pmd assignments is measured and stored. */
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#define PMD_RXQ_INTERVAL_LEN 10000
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/* Number of intervals for which cycles are stored
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* and used during rxq to pmd assignment. */
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#define PMD_RXQ_INTERVAL_MAX 6
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struct dpcls {
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struct cmap_node node; /* Within dp_netdev_pmd_thread.classifiers */
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odp_port_t in_port;
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struct cmap subtables_map;
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struct pvector subtables;
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};
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/* A rule to be inserted to the classifier. */
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struct dpcls_rule {
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struct cmap_node cmap_node; /* Within struct dpcls_subtable 'rules'. */
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struct netdev_flow_key *mask; /* Subtable's mask. */
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struct netdev_flow_key flow; /* Matching key. */
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/* 'flow' must be the last field, additional space is allocated here. */
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};
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static void dpcls_init(struct dpcls *);
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static void dpcls_destroy(struct dpcls *);
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static void dpcls_sort_subtable_vector(struct dpcls *);
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static void dpcls_insert(struct dpcls *, struct dpcls_rule *,
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const struct netdev_flow_key *mask);
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static void dpcls_remove(struct dpcls *, struct dpcls_rule *);
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static bool dpcls_lookup(struct dpcls *cls,
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const struct netdev_flow_key keys[],
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struct dpcls_rule **rules, size_t cnt,
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int *num_lookups_p);
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/* Set of supported meter flags */
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#define DP_SUPPORTED_METER_FLAGS_MASK \
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(OFPMF13_STATS | OFPMF13_PKTPS | OFPMF13_KBPS | OFPMF13_BURST)
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/* Set of supported meter band types */
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#define DP_SUPPORTED_METER_BAND_TYPES \
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( 1 << OFPMBT13_DROP )
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struct dp_meter_band {
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struct ofputil_meter_band up; /* type, prec_level, pad, rate, burst_size */
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uint32_t bucket; /* In 1/1000 packets (for PKTPS), or in bits (for KBPS) */
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uint64_t packet_count;
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uint64_t byte_count;
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};
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struct dp_meter {
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uint16_t flags;
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uint16_t n_bands;
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uint32_t max_delta_t;
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uint64_t used;
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uint64_t packet_count;
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uint64_t byte_count;
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struct dp_meter_band bands[];
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};
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/* Datapath based on the network device interface from netdev.h.
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*
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*
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* Thread-safety
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* =============
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*
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* Some members, marked 'const', are immutable. Accessing other members
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* requires synchronization, as noted in more detail below.
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*
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* Acquisition order is, from outermost to innermost:
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*
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* dp_netdev_mutex (global)
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* port_mutex
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* non_pmd_mutex
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*/
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struct dp_netdev {
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const struct dpif_class *const class;
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const char *const name;
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struct dpif *dpif;
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struct ovs_refcount ref_cnt;
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atomic_flag destroyed;
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/* Ports.
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*
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* Any lookup into 'ports' or any access to the dp_netdev_ports found
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* through 'ports' requires taking 'port_mutex'. */
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struct ovs_mutex port_mutex;
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struct hmap ports;
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struct seq *port_seq; /* Incremented whenever a port changes. */
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/* Meters. */
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struct ovs_mutex meter_locks[N_METER_LOCKS];
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struct dp_meter *meters[MAX_METERS]; /* Meter bands. */
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/* Probability of EMC insertions is a factor of 'emc_insert_min'.*/
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OVS_ALIGNED_VAR(CACHE_LINE_SIZE) atomic_uint32_t emc_insert_min;
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/* Protects access to ofproto-dpif-upcall interface during revalidator
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* thread synchronization. */
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struct fat_rwlock upcall_rwlock;
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upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
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void *upcall_aux;
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/* Callback function for notifying the purging of dp flows (during
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* reseting pmd deletion). */
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dp_purge_callback *dp_purge_cb;
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void *dp_purge_aux;
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/* Stores all 'struct dp_netdev_pmd_thread's. */
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struct cmap poll_threads;
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/* id pool for per thread static_tx_qid. */
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struct id_pool *tx_qid_pool;
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struct ovs_mutex tx_qid_pool_mutex;
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/* Protects the access of the 'struct dp_netdev_pmd_thread'
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* instance for non-pmd thread. */
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struct ovs_mutex non_pmd_mutex;
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/* Each pmd thread will store its pointer to
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* 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
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ovsthread_key_t per_pmd_key;
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struct seq *reconfigure_seq;
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uint64_t last_reconfigure_seq;
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/* Cpu mask for pin of pmd threads. */
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char *pmd_cmask;
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uint64_t last_tnl_conf_seq;
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struct conntrack conntrack;
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};
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static void meter_lock(const struct dp_netdev *dp, uint32_t meter_id)
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OVS_ACQUIRES(dp->meter_locks[meter_id % N_METER_LOCKS])
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{
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ovs_mutex_lock(&dp->meter_locks[meter_id % N_METER_LOCKS]);
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}
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static void meter_unlock(const struct dp_netdev *dp, uint32_t meter_id)
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OVS_RELEASES(dp->meter_locks[meter_id % N_METER_LOCKS])
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{
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ovs_mutex_unlock(&dp->meter_locks[meter_id % N_METER_LOCKS]);
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}
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static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
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odp_port_t)
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OVS_REQUIRES(dp->port_mutex);
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enum dp_stat_type {
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DP_STAT_EXACT_HIT, /* Packets that had an exact match (emc). */
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DP_STAT_MASKED_HIT, /* Packets that matched in the flow table. */
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DP_STAT_MISS, /* Packets that did not match. */
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DP_STAT_LOST, /* Packets not passed up to the client. */
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DP_STAT_LOOKUP_HIT, /* Number of subtable lookups for flow table
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hits */
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DP_N_STATS
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};
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enum pmd_cycles_counter_type {
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PMD_CYCLES_IDLE, /* Cycles spent idle or unsuccessful polling */
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PMD_CYCLES_PROCESSING, /* Cycles spent successfully polling and
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* processing polled packets */
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PMD_N_CYCLES
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};
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enum rxq_cycles_counter_type {
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RXQ_CYCLES_PROC_CURR, /* Cycles spent successfully polling and
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processing packets during the current
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interval. */
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RXQ_CYCLES_PROC_HIST, /* Total cycles of all intervals that are used
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during rxq to pmd assignment. */
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RXQ_N_CYCLES
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};
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#define XPS_TIMEOUT_MS 500LL
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/* Contained by struct dp_netdev_port's 'rxqs' member. */
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struct dp_netdev_rxq {
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struct dp_netdev_port *port;
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struct netdev_rxq *rx;
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unsigned core_id; /* Core to which this queue should be
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pinned. OVS_CORE_UNSPEC if the
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queue doesn't need to be pinned to a
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particular core. */
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struct dp_netdev_pmd_thread *pmd; /* pmd thread that polls this queue. */
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/* Counters of cycles spent successfully polling and processing pkts. */
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atomic_ullong cycles[RXQ_N_CYCLES];
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/* We store PMD_RXQ_INTERVAL_MAX intervals of data for an rxq and then
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sum them to yield the cycles used for an rxq. */
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atomic_ullong cycles_intrvl[PMD_RXQ_INTERVAL_MAX];
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unsigned intrvl_idx; /* Write index for 'cycles_intrvl'. */
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};
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/* A port in a netdev-based datapath. */
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struct dp_netdev_port {
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odp_port_t port_no;
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bool dynamic_txqs; /* If true XPS will be used. */
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bool need_reconfigure; /* True if we should reconfigure netdev. */
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struct netdev *netdev;
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struct hmap_node node; /* Node in dp_netdev's 'ports'. */
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struct netdev_saved_flags *sf;
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struct dp_netdev_rxq *rxqs;
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unsigned n_rxq; /* Number of elements in 'rxqs' */
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unsigned *txq_used; /* Number of threads that use each tx queue. */
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struct ovs_mutex txq_used_mutex;
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char *type; /* Port type as requested by user. */
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char *rxq_affinity_list; /* Requested affinity of rx queues. */
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};
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/* Contained by struct dp_netdev_flow's 'stats' member. */
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struct dp_netdev_flow_stats {
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atomic_llong used; /* Last used time, in monotonic msecs. */
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atomic_ullong packet_count; /* Number of packets matched. */
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atomic_ullong byte_count; /* Number of bytes matched. */
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atomic_uint16_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
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};
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/* A flow in 'dp_netdev_pmd_thread's 'flow_table'.
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*
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*
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* Thread-safety
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* =============
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*
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* Except near the beginning or ending of its lifespan, rule 'rule' belongs to
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* its pmd thread's classifier. The text below calls this classifier 'cls'.
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*
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* Motivation
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* ----------
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*
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* The thread safety rules described here for "struct dp_netdev_flow" are
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* motivated by two goals:
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*
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* - Prevent threads that read members of "struct dp_netdev_flow" from
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* reading bad data due to changes by some thread concurrently modifying
|
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* those members.
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*
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* - Prevent two threads making changes to members of a given "struct
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* dp_netdev_flow" from interfering with each other.
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*
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*
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* Rules
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* -----
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*
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* A flow 'flow' may be accessed without a risk of being freed during an RCU
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* grace period. Code that needs to hold onto a flow for a while
|
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* should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
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*
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* 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
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* flow from being deleted from 'cls' and it doesn't protect members of 'flow'
|
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* from modification.
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*
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* Some members, marked 'const', are immutable. Accessing other members
|
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* requires synchronization, as noted in more detail below.
|
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*/
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struct dp_netdev_flow {
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const struct flow flow; /* Unmasked flow that created this entry. */
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/* Hash table index by unmasked flow. */
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const struct cmap_node node; /* In owning dp_netdev_pmd_thread's */
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/* 'flow_table'. */
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const ovs_u128 ufid; /* Unique flow identifier. */
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const unsigned pmd_id; /* The 'core_id' of pmd thread owning this */
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/* flow. */
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/* Number of references.
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* The classifier owns one reference.
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* Any thread trying to keep a rule from being freed should hold its own
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* reference. */
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struct ovs_refcount ref_cnt;
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bool dead;
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/* Statistics. */
|
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struct dp_netdev_flow_stats stats;
|
||
|
||
/* Actions. */
|
||
OVSRCU_TYPE(struct dp_netdev_actions *) actions;
|
||
|
||
/* While processing a group of input packets, the datapath uses the next
|
||
* member to store a pointer to the output batch for the flow. It is
|
||
* reset after the batch has been sent out (See dp_netdev_queue_batches(),
|
||
* packet_batch_per_flow_init() and packet_batch_per_flow_execute()). */
|
||
struct packet_batch_per_flow *batch;
|
||
|
||
/* Packet classification. */
|
||
struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
|
||
/* 'cr' must be the last member. */
|
||
};
|
||
|
||
static void dp_netdev_flow_unref(struct dp_netdev_flow *);
|
||
static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
|
||
static int dpif_netdev_flow_from_nlattrs(const struct nlattr *, uint32_t,
|
||
struct flow *, bool);
|
||
|
||
/* A set of datapath actions within a "struct dp_netdev_flow".
|
||
*
|
||
*
|
||
* Thread-safety
|
||
* =============
|
||
*
|
||
* A struct dp_netdev_actions 'actions' is protected with RCU. */
|
||
struct dp_netdev_actions {
|
||
/* These members are immutable: they do not change during the struct's
|
||
* lifetime. */
|
||
unsigned int size; /* Size of 'actions', in bytes. */
|
||
struct nlattr actions[]; /* Sequence of OVS_ACTION_ATTR_* attributes. */
|
||
};
|
||
|
||
struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
|
||
size_t);
|
||
struct dp_netdev_actions *dp_netdev_flow_get_actions(
|
||
const struct dp_netdev_flow *);
|
||
static void dp_netdev_actions_free(struct dp_netdev_actions *);
|
||
|
||
/* Contained by struct dp_netdev_pmd_thread's 'stats' member. */
|
||
struct dp_netdev_pmd_stats {
|
||
/* Indexed by DP_STAT_*. */
|
||
atomic_ullong n[DP_N_STATS];
|
||
};
|
||
|
||
/* Contained by struct dp_netdev_pmd_thread's 'cycle' member. */
|
||
struct dp_netdev_pmd_cycles {
|
||
/* Indexed by PMD_CYCLES_*. */
|
||
atomic_ullong n[PMD_N_CYCLES];
|
||
};
|
||
|
||
struct polled_queue {
|
||
struct dp_netdev_rxq *rxq;
|
||
odp_port_t port_no;
|
||
};
|
||
|
||
/* Contained by struct dp_netdev_pmd_thread's 'poll_list' member. */
|
||
struct rxq_poll {
|
||
struct dp_netdev_rxq *rxq;
|
||
struct hmap_node node;
|
||
};
|
||
|
||
/* Contained by struct dp_netdev_pmd_thread's 'send_port_cache',
|
||
* 'tnl_port_cache' or 'tx_ports'. */
|
||
struct tx_port {
|
||
struct dp_netdev_port *port;
|
||
int qid;
|
||
long long last_used;
|
||
struct hmap_node node;
|
||
};
|
||
|
||
/* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
|
||
* the performance overhead of interrupt processing. Therefore netdev can
|
||
* not implement rx-wait for these devices. dpif-netdev needs to poll
|
||
* these device to check for recv buffer. pmd-thread does polling for
|
||
* devices assigned to itself.
|
||
*
|
||
* DPDK used PMD for accessing NIC.
|
||
*
|
||
* Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
|
||
* I/O of all non-pmd threads. There will be no actual thread created
|
||
* for the instance.
|
||
*
|
||
* Each struct has its own flow cache and classifier per managed ingress port.
|
||
* For packets received on ingress port, a look up is done on corresponding PMD
|
||
* thread's flow cache and in case of a miss, lookup is performed in the
|
||
* corresponding classifier of port. Packets are executed with the found
|
||
* actions in either case.
|
||
* */
|
||
struct dp_netdev_pmd_thread {
|
||
struct dp_netdev *dp;
|
||
struct ovs_refcount ref_cnt; /* Every reference must be refcount'ed. */
|
||
struct cmap_node node; /* In 'dp->poll_threads'. */
|
||
|
||
pthread_cond_t cond; /* For synchronizing pmd thread reload. */
|
||
struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
|
||
|
||
/* Per thread exact-match cache. Note, the instance for cpu core
|
||
* NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
|
||
* need to be protected by 'non_pmd_mutex'. Every other instance
|
||
* will only be accessed by its own pmd thread. */
|
||
struct emc_cache flow_cache;
|
||
|
||
/* Flow-Table and classifiers
|
||
*
|
||
* Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
|
||
* changes to 'classifiers' must be made while still holding the
|
||
* 'flow_mutex'.
|
||
*/
|
||
struct ovs_mutex flow_mutex;
|
||
struct cmap flow_table OVS_GUARDED; /* Flow table. */
|
||
|
||
/* One classifier per in_port polled by the pmd */
|
||
struct cmap classifiers;
|
||
/* Periodically sort subtable vectors according to hit frequencies */
|
||
long long int next_optimization;
|
||
/* End of the next time interval for which processing cycles
|
||
are stored for each polled rxq. */
|
||
long long int rxq_interval;
|
||
|
||
/* Statistics. */
|
||
struct dp_netdev_pmd_stats stats;
|
||
|
||
/* Cycles counters */
|
||
struct dp_netdev_pmd_cycles cycles;
|
||
|
||
/* Used to count cicles. See 'cycles_counter_end()' */
|
||
unsigned long long last_cycles;
|
||
|
||
struct latch exit_latch; /* For terminating the pmd thread. */
|
||
struct seq *reload_seq;
|
||
uint64_t last_reload_seq;
|
||
atomic_bool reload; /* Do we need to reload ports? */
|
||
pthread_t thread;
|
||
unsigned core_id; /* CPU core id of this pmd thread. */
|
||
int numa_id; /* numa node id of this pmd thread. */
|
||
bool isolated;
|
||
|
||
/* Queue id used by this pmd thread to send packets on all netdevs if
|
||
* XPS disabled for this netdev. All static_tx_qid's are unique and less
|
||
* than 'cmap_count(dp->poll_threads)'. */
|
||
uint32_t static_tx_qid;
|
||
|
||
struct ovs_mutex port_mutex; /* Mutex for 'poll_list' and 'tx_ports'. */
|
||
/* List of rx queues to poll. */
|
||
struct hmap poll_list OVS_GUARDED;
|
||
/* Map of 'tx_port's used for transmission. Written by the main thread,
|
||
* read by the pmd thread. */
|
||
struct hmap tx_ports OVS_GUARDED;
|
||
|
||
/* These are thread-local copies of 'tx_ports'. One contains only tunnel
|
||
* ports (that support push_tunnel/pop_tunnel), the other contains ports
|
||
* with at least one txq (that support send). A port can be in both.
|
||
*
|
||
* There are two separate maps to make sure that we don't try to execute
|
||
* OUTPUT on a device which has 0 txqs or PUSH/POP on a non-tunnel device.
|
||
*
|
||
* The instances for cpu core NON_PMD_CORE_ID can be accessed by multiple
|
||
* threads, and thusly need to be protected by 'non_pmd_mutex'. Every
|
||
* other instance will only be accessed by its own pmd thread. */
|
||
struct hmap tnl_port_cache;
|
||
struct hmap send_port_cache;
|
||
|
||
/* Only a pmd thread can write on its own 'cycles' and 'stats'.
|
||
* The main thread keeps 'stats_zero' and 'cycles_zero' as base
|
||
* values and subtracts them from 'stats' and 'cycles' before
|
||
* reporting to the user */
|
||
unsigned long long stats_zero[DP_N_STATS];
|
||
uint64_t cycles_zero[PMD_N_CYCLES];
|
||
|
||
/* Set to true if the pmd thread needs to be reloaded. */
|
||
bool need_reload;
|
||
};
|
||
|
||
/* Interface to netdev-based datapath. */
|
||
struct dpif_netdev {
|
||
struct dpif dpif;
|
||
struct dp_netdev *dp;
|
||
uint64_t last_port_seq;
|
||
};
|
||
|
||
static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
|
||
struct dp_netdev_port **portp)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
static int get_port_by_name(struct dp_netdev *dp, const char *devname,
|
||
struct dp_netdev_port **portp)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
static void dp_netdev_free(struct dp_netdev *)
|
||
OVS_REQUIRES(dp_netdev_mutex);
|
||
static int do_add_port(struct dp_netdev *dp, const char *devname,
|
||
const char *type, odp_port_t port_no)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
static int dpif_netdev_open(const struct dpif_class *, const char *name,
|
||
bool create, struct dpif **);
|
||
static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *,
|
||
bool may_steal, const struct flow *flow,
|
||
const struct nlattr *actions,
|
||
size_t actions_len,
|
||
long long now);
|
||
static void dp_netdev_input(struct dp_netdev_pmd_thread *,
|
||
struct dp_packet_batch *, odp_port_t port_no);
|
||
static void dp_netdev_recirculate(struct dp_netdev_pmd_thread *,
|
||
struct dp_packet_batch *);
|
||
|
||
static void dp_netdev_disable_upcall(struct dp_netdev *);
|
||
static void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev *dp, unsigned core_id,
|
||
int numa_id);
|
||
static void dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_set_nonpmd(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
|
||
static void *pmd_thread_main(void *);
|
||
static struct dp_netdev_pmd_thread *dp_netdev_get_pmd(struct dp_netdev *dp,
|
||
unsigned core_id);
|
||
static struct dp_netdev_pmd_thread *
|
||
dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos);
|
||
static void dp_netdev_del_pmd(struct dp_netdev *dp,
|
||
struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp, bool non_pmd);
|
||
static void dp_netdev_pmd_clear_ports(struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_add_port_tx_to_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_port *port)
|
||
OVS_REQUIRES(pmd->port_mutex);
|
||
static void dp_netdev_del_port_tx_from_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct tx_port *tx)
|
||
OVS_REQUIRES(pmd->port_mutex);
|
||
static void dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_rxq *rxq)
|
||
OVS_REQUIRES(pmd->port_mutex);
|
||
static void dp_netdev_del_rxq_from_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct rxq_poll *poll)
|
||
OVS_REQUIRES(pmd->port_mutex);
|
||
static void reconfigure_datapath(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex);
|
||
static bool dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd);
|
||
static void dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd);
|
||
static void pmd_load_cached_ports(struct dp_netdev_pmd_thread *pmd)
|
||
OVS_REQUIRES(pmd->port_mutex);
|
||
static inline void
|
||
dp_netdev_pmd_try_optimize(struct dp_netdev_pmd_thread *pmd,
|
||
struct polled_queue *poll_list, int poll_cnt);
|
||
static void
|
||
dp_netdev_rxq_set_cycles(struct dp_netdev_rxq *rx,
|
||
enum rxq_cycles_counter_type type,
|
||
unsigned long long cycles);
|
||
static uint64_t
|
||
dp_netdev_rxq_get_cycles(struct dp_netdev_rxq *rx,
|
||
enum rxq_cycles_counter_type type);
|
||
static void
|
||
dp_netdev_rxq_set_intrvl_cycles(struct dp_netdev_rxq *rx,
|
||
unsigned long long cycles);
|
||
static uint64_t
|
||
dp_netdev_rxq_get_intrvl_cycles(struct dp_netdev_rxq *rx, unsigned idx);
|
||
static void
|
||
dpif_netdev_xps_revalidate_pmd(const struct dp_netdev_pmd_thread *pmd,
|
||
long long now, bool purge);
|
||
static int dpif_netdev_xps_get_tx_qid(const struct dp_netdev_pmd_thread *pmd,
|
||
struct tx_port *tx, long long now);
|
||
|
||
static inline bool emc_entry_alive(struct emc_entry *ce);
|
||
static void emc_clear_entry(struct emc_entry *ce);
|
||
|
||
static void dp_netdev_request_reconfigure(struct dp_netdev *dp);
|
||
|
||
static void
|
||
emc_cache_init(struct emc_cache *flow_cache)
|
||
{
|
||
int i;
|
||
|
||
flow_cache->sweep_idx = 0;
|
||
for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
|
||
flow_cache->entries[i].flow = NULL;
|
||
flow_cache->entries[i].key.hash = 0;
|
||
flow_cache->entries[i].key.len = sizeof(struct miniflow);
|
||
flowmap_init(&flow_cache->entries[i].key.mf.map);
|
||
}
|
||
}
|
||
|
||
static void
|
||
emc_cache_uninit(struct emc_cache *flow_cache)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
|
||
emc_clear_entry(&flow_cache->entries[i]);
|
||
}
|
||
}
|
||
|
||
/* Check and clear dead flow references slowly (one entry at each
|
||
* invocation). */
|
||
static void
|
||
emc_cache_slow_sweep(struct emc_cache *flow_cache)
|
||
{
|
||
struct emc_entry *entry = &flow_cache->entries[flow_cache->sweep_idx];
|
||
|
||
if (!emc_entry_alive(entry)) {
|
||
emc_clear_entry(entry);
|
||
}
|
||
flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
|
||
}
|
||
|
||
/* Returns true if 'dpif' is a netdev or dummy dpif, false otherwise. */
|
||
bool
|
||
dpif_is_netdev(const struct dpif *dpif)
|
||
{
|
||
return dpif->dpif_class->open == dpif_netdev_open;
|
||
}
|
||
|
||
static struct dpif_netdev *
|
||
dpif_netdev_cast(const struct dpif *dpif)
|
||
{
|
||
ovs_assert(dpif_is_netdev(dpif));
|
||
return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
|
||
}
|
||
|
||
static struct dp_netdev *
|
||
get_dp_netdev(const struct dpif *dpif)
|
||
{
|
||
return dpif_netdev_cast(dpif)->dp;
|
||
}
|
||
|
||
enum pmd_info_type {
|
||
PMD_INFO_SHOW_STATS, /* Show how cpu cycles are spent. */
|
||
PMD_INFO_CLEAR_STATS, /* Set the cycles count to 0. */
|
||
PMD_INFO_SHOW_RXQ /* Show poll-lists of pmd threads. */
|
||
};
|
||
|
||
static void
|
||
pmd_info_show_stats(struct ds *reply,
|
||
struct dp_netdev_pmd_thread *pmd,
|
||
unsigned long long stats[DP_N_STATS],
|
||
uint64_t cycles[PMD_N_CYCLES])
|
||
{
|
||
unsigned long long total_packets;
|
||
uint64_t total_cycles = 0;
|
||
int i;
|
||
|
||
/* These loops subtracts reference values ('*_zero') from the counters.
|
||
* Since loads and stores are relaxed, it might be possible for a '*_zero'
|
||
* value to be more recent than the current value we're reading from the
|
||
* counter. This is not a big problem, since these numbers are not
|
||
* supposed to be too accurate, but we should at least make sure that
|
||
* the result is not negative. */
|
||
for (i = 0; i < DP_N_STATS; i++) {
|
||
if (stats[i] > pmd->stats_zero[i]) {
|
||
stats[i] -= pmd->stats_zero[i];
|
||
} else {
|
||
stats[i] = 0;
|
||
}
|
||
}
|
||
|
||
/* Sum of all the matched and not matched packets gives the total. */
|
||
total_packets = stats[DP_STAT_EXACT_HIT] + stats[DP_STAT_MASKED_HIT]
|
||
+ stats[DP_STAT_MISS];
|
||
|
||
for (i = 0; i < PMD_N_CYCLES; i++) {
|
||
if (cycles[i] > pmd->cycles_zero[i]) {
|
||
cycles[i] -= pmd->cycles_zero[i];
|
||
} else {
|
||
cycles[i] = 0;
|
||
}
|
||
|
||
total_cycles += cycles[i];
|
||
}
|
||
|
||
ds_put_cstr(reply, (pmd->core_id == NON_PMD_CORE_ID)
|
||
? "main thread" : "pmd thread");
|
||
|
||
if (pmd->numa_id != OVS_NUMA_UNSPEC) {
|
||
ds_put_format(reply, " numa_id %d", pmd->numa_id);
|
||
}
|
||
if (pmd->core_id != OVS_CORE_UNSPEC && pmd->core_id != NON_PMD_CORE_ID) {
|
||
ds_put_format(reply, " core_id %u", pmd->core_id);
|
||
}
|
||
ds_put_cstr(reply, ":\n");
|
||
|
||
ds_put_format(reply,
|
||
"\temc hits:%llu\n\tmegaflow hits:%llu\n"
|
||
"\tavg. subtable lookups per hit:%.2f\n"
|
||
"\tmiss:%llu\n\tlost:%llu\n",
|
||
stats[DP_STAT_EXACT_HIT], stats[DP_STAT_MASKED_HIT],
|
||
stats[DP_STAT_MASKED_HIT] > 0
|
||
? (1.0*stats[DP_STAT_LOOKUP_HIT])/stats[DP_STAT_MASKED_HIT]
|
||
: 0,
|
||
stats[DP_STAT_MISS], stats[DP_STAT_LOST]);
|
||
|
||
if (total_cycles == 0) {
|
||
return;
|
||
}
|
||
|
||
ds_put_format(reply,
|
||
"\tidle cycles:%"PRIu64" (%.02f%%)\n"
|
||
"\tprocessing cycles:%"PRIu64" (%.02f%%)\n",
|
||
cycles[PMD_CYCLES_IDLE],
|
||
cycles[PMD_CYCLES_IDLE] / (double)total_cycles * 100,
|
||
cycles[PMD_CYCLES_PROCESSING],
|
||
cycles[PMD_CYCLES_PROCESSING] / (double)total_cycles * 100);
|
||
|
||
if (total_packets == 0) {
|
||
return;
|
||
}
|
||
|
||
ds_put_format(reply,
|
||
"\tavg cycles per packet: %.02f (%"PRIu64"/%llu)\n",
|
||
total_cycles / (double)total_packets,
|
||
total_cycles, total_packets);
|
||
|
||
ds_put_format(reply,
|
||
"\tavg processing cycles per packet: "
|
||
"%.02f (%"PRIu64"/%llu)\n",
|
||
cycles[PMD_CYCLES_PROCESSING] / (double)total_packets,
|
||
cycles[PMD_CYCLES_PROCESSING], total_packets);
|
||
}
|
||
|
||
static void
|
||
pmd_info_clear_stats(struct ds *reply OVS_UNUSED,
|
||
struct dp_netdev_pmd_thread *pmd,
|
||
unsigned long long stats[DP_N_STATS],
|
||
uint64_t cycles[PMD_N_CYCLES])
|
||
{
|
||
int i;
|
||
|
||
/* We cannot write 'stats' and 'cycles' (because they're written by other
|
||
* threads) and we shouldn't change 'stats' (because they're used to count
|
||
* datapath stats, which must not be cleared here). Instead, we save the
|
||
* current values and subtract them from the values to be displayed in the
|
||
* future */
|
||
for (i = 0; i < DP_N_STATS; i++) {
|
||
pmd->stats_zero[i] = stats[i];
|
||
}
|
||
for (i = 0; i < PMD_N_CYCLES; i++) {
|
||
pmd->cycles_zero[i] = cycles[i];
|
||
}
|
||
}
|
||
|
||
static int
|
||
compare_poll_list(const void *a_, const void *b_)
|
||
{
|
||
const struct rxq_poll *a = a_;
|
||
const struct rxq_poll *b = b_;
|
||
|
||
const char *namea = netdev_rxq_get_name(a->rxq->rx);
|
||
const char *nameb = netdev_rxq_get_name(b->rxq->rx);
|
||
|
||
int cmp = strcmp(namea, nameb);
|
||
if (!cmp) {
|
||
return netdev_rxq_get_queue_id(a->rxq->rx)
|
||
- netdev_rxq_get_queue_id(b->rxq->rx);
|
||
} else {
|
||
return cmp;
|
||
}
|
||
}
|
||
|
||
static void
|
||
sorted_poll_list(struct dp_netdev_pmd_thread *pmd, struct rxq_poll **list,
|
||
size_t *n)
|
||
{
|
||
struct rxq_poll *ret, *poll;
|
||
size_t i;
|
||
|
||
*n = hmap_count(&pmd->poll_list);
|
||
if (!*n) {
|
||
ret = NULL;
|
||
} else {
|
||
ret = xcalloc(*n, sizeof *ret);
|
||
i = 0;
|
||
HMAP_FOR_EACH (poll, node, &pmd->poll_list) {
|
||
ret[i] = *poll;
|
||
i++;
|
||
}
|
||
ovs_assert(i == *n);
|
||
qsort(ret, *n, sizeof *ret, compare_poll_list);
|
||
}
|
||
|
||
*list = ret;
|
||
}
|
||
|
||
static void
|
||
pmd_info_show_rxq(struct ds *reply, struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
if (pmd->core_id != NON_PMD_CORE_ID) {
|
||
const char *prev_name = NULL;
|
||
struct rxq_poll *list;
|
||
size_t i, n;
|
||
|
||
ds_put_format(reply,
|
||
"pmd thread numa_id %d core_id %u:\n\tisolated : %s\n",
|
||
pmd->numa_id, pmd->core_id, (pmd->isolated)
|
||
? "true" : "false");
|
||
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
sorted_poll_list(pmd, &list, &n);
|
||
for (i = 0; i < n; i++) {
|
||
const char *name = netdev_rxq_get_name(list[i].rxq->rx);
|
||
|
||
if (!prev_name || strcmp(name, prev_name)) {
|
||
if (prev_name) {
|
||
ds_put_cstr(reply, "\n");
|
||
}
|
||
ds_put_format(reply, "\tport: %s\tqueue-id:", name);
|
||
}
|
||
ds_put_format(reply, " %d",
|
||
netdev_rxq_get_queue_id(list[i].rxq->rx));
|
||
prev_name = name;
|
||
}
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
ds_put_cstr(reply, "\n");
|
||
free(list);
|
||
}
|
||
}
|
||
|
||
static int
|
||
compare_poll_thread_list(const void *a_, const void *b_)
|
||
{
|
||
const struct dp_netdev_pmd_thread *a, *b;
|
||
|
||
a = *(struct dp_netdev_pmd_thread **)a_;
|
||
b = *(struct dp_netdev_pmd_thread **)b_;
|
||
|
||
if (a->core_id < b->core_id) {
|
||
return -1;
|
||
}
|
||
if (a->core_id > b->core_id) {
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Create a sorted list of pmd's from the dp->poll_threads cmap. We can use
|
||
* this list, as long as we do not go to quiescent state. */
|
||
static void
|
||
sorted_poll_thread_list(struct dp_netdev *dp,
|
||
struct dp_netdev_pmd_thread ***list,
|
||
size_t *n)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct dp_netdev_pmd_thread **pmd_list;
|
||
size_t k = 0, n_pmds;
|
||
|
||
n_pmds = cmap_count(&dp->poll_threads);
|
||
pmd_list = xcalloc(n_pmds, sizeof *pmd_list);
|
||
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (k >= n_pmds) {
|
||
break;
|
||
}
|
||
pmd_list[k++] = pmd;
|
||
}
|
||
|
||
qsort(pmd_list, k, sizeof *pmd_list, compare_poll_thread_list);
|
||
|
||
*list = pmd_list;
|
||
*n = k;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_pmd_rebalance(struct unixctl_conn *conn, int argc,
|
||
const char *argv[], void *aux OVS_UNUSED)
|
||
{
|
||
struct ds reply = DS_EMPTY_INITIALIZER;
|
||
struct dp_netdev *dp = NULL;
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
|
||
if (argc == 2) {
|
||
dp = shash_find_data(&dp_netdevs, argv[1]);
|
||
} else if (shash_count(&dp_netdevs) == 1) {
|
||
/* There's only one datapath */
|
||
dp = shash_first(&dp_netdevs)->data;
|
||
}
|
||
|
||
if (!dp) {
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
unixctl_command_reply_error(conn,
|
||
"please specify an existing datapath");
|
||
return;
|
||
}
|
||
|
||
dp_netdev_request_reconfigure(dp);
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
ds_put_cstr(&reply, "pmd rxq rebalance requested.\n");
|
||
unixctl_command_reply(conn, ds_cstr(&reply));
|
||
ds_destroy(&reply);
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_pmd_info(struct unixctl_conn *conn, int argc, const char *argv[],
|
||
void *aux)
|
||
{
|
||
struct ds reply = DS_EMPTY_INITIALIZER;
|
||
struct dp_netdev_pmd_thread **pmd_list;
|
||
struct dp_netdev *dp = NULL;
|
||
size_t n;
|
||
enum pmd_info_type type = *(enum pmd_info_type *) aux;
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
|
||
if (argc == 2) {
|
||
dp = shash_find_data(&dp_netdevs, argv[1]);
|
||
} else if (shash_count(&dp_netdevs) == 1) {
|
||
/* There's only one datapath */
|
||
dp = shash_first(&dp_netdevs)->data;
|
||
}
|
||
|
||
if (!dp) {
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
unixctl_command_reply_error(conn,
|
||
"please specify an existing datapath");
|
||
return;
|
||
}
|
||
|
||
sorted_poll_thread_list(dp, &pmd_list, &n);
|
||
for (size_t i = 0; i < n; i++) {
|
||
struct dp_netdev_pmd_thread *pmd = pmd_list[i];
|
||
if (!pmd) {
|
||
break;
|
||
}
|
||
|
||
if (type == PMD_INFO_SHOW_RXQ) {
|
||
pmd_info_show_rxq(&reply, pmd);
|
||
} else {
|
||
unsigned long long stats[DP_N_STATS];
|
||
uint64_t cycles[PMD_N_CYCLES];
|
||
|
||
/* Read current stats and cycle counters */
|
||
for (size_t j = 0; j < ARRAY_SIZE(stats); j++) {
|
||
atomic_read_relaxed(&pmd->stats.n[j], &stats[j]);
|
||
}
|
||
for (size_t j = 0; j < ARRAY_SIZE(cycles); j++) {
|
||
atomic_read_relaxed(&pmd->cycles.n[j], &cycles[j]);
|
||
}
|
||
|
||
if (type == PMD_INFO_CLEAR_STATS) {
|
||
pmd_info_clear_stats(&reply, pmd, stats, cycles);
|
||
} else if (type == PMD_INFO_SHOW_STATS) {
|
||
pmd_info_show_stats(&reply, pmd, stats, cycles);
|
||
}
|
||
}
|
||
}
|
||
free(pmd_list);
|
||
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
|
||
unixctl_command_reply(conn, ds_cstr(&reply));
|
||
ds_destroy(&reply);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_init(void)
|
||
{
|
||
static enum pmd_info_type show_aux = PMD_INFO_SHOW_STATS,
|
||
clear_aux = PMD_INFO_CLEAR_STATS,
|
||
poll_aux = PMD_INFO_SHOW_RXQ;
|
||
|
||
unixctl_command_register("dpif-netdev/pmd-stats-show", "[dp]",
|
||
0, 1, dpif_netdev_pmd_info,
|
||
(void *)&show_aux);
|
||
unixctl_command_register("dpif-netdev/pmd-stats-clear", "[dp]",
|
||
0, 1, dpif_netdev_pmd_info,
|
||
(void *)&clear_aux);
|
||
unixctl_command_register("dpif-netdev/pmd-rxq-show", "[dp]",
|
||
0, 1, dpif_netdev_pmd_info,
|
||
(void *)&poll_aux);
|
||
unixctl_command_register("dpif-netdev/pmd-rxq-rebalance", "[dp]",
|
||
0, 1, dpif_netdev_pmd_rebalance,
|
||
NULL);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_enumerate(struct sset *all_dps,
|
||
const struct dpif_class *dpif_class)
|
||
{
|
||
struct shash_node *node;
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
SHASH_FOR_EACH(node, &dp_netdevs) {
|
||
struct dp_netdev *dp = node->data;
|
||
if (dpif_class != dp->class) {
|
||
/* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
|
||
* If the class doesn't match, skip this dpif. */
|
||
continue;
|
||
}
|
||
sset_add(all_dps, node->name);
|
||
}
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static bool
|
||
dpif_netdev_class_is_dummy(const struct dpif_class *class)
|
||
{
|
||
return class != &dpif_netdev_class;
|
||
}
|
||
|
||
static const char *
|
||
dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
|
||
{
|
||
return strcmp(type, "internal") ? type
|
||
: dpif_netdev_class_is_dummy(class) ? "dummy-internal"
|
||
: "tap";
|
||
}
|
||
|
||
static struct dpif *
|
||
create_dpif_netdev(struct dp_netdev *dp)
|
||
{
|
||
uint16_t netflow_id = hash_string(dp->name, 0);
|
||
struct dpif_netdev *dpif;
|
||
|
||
ovs_refcount_ref(&dp->ref_cnt);
|
||
|
||
dpif = xmalloc(sizeof *dpif);
|
||
dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
|
||
dpif->dp = dp;
|
||
dpif->last_port_seq = seq_read(dp->port_seq);
|
||
|
||
return &dpif->dpif;
|
||
}
|
||
|
||
/* Choose an unused, non-zero port number and return it on success.
|
||
* Return ODPP_NONE on failure. */
|
||
static odp_port_t
|
||
choose_port(struct dp_netdev *dp, const char *name)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
uint32_t port_no;
|
||
|
||
if (dp->class != &dpif_netdev_class) {
|
||
const char *p;
|
||
int start_no = 0;
|
||
|
||
/* If the port name begins with "br", start the number search at
|
||
* 100 to make writing tests easier. */
|
||
if (!strncmp(name, "br", 2)) {
|
||
start_no = 100;
|
||
}
|
||
|
||
/* If the port name contains a number, try to assign that port number.
|
||
* This can make writing unit tests easier because port numbers are
|
||
* predictable. */
|
||
for (p = name; *p != '\0'; p++) {
|
||
if (isdigit((unsigned char) *p)) {
|
||
port_no = start_no + strtol(p, NULL, 10);
|
||
if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
|
||
&& !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
|
||
return u32_to_odp(port_no);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
|
||
if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
|
||
return u32_to_odp(port_no);
|
||
}
|
||
}
|
||
|
||
return ODPP_NONE;
|
||
}
|
||
|
||
static int
|
||
create_dp_netdev(const char *name, const struct dpif_class *class,
|
||
struct dp_netdev **dpp)
|
||
OVS_REQUIRES(dp_netdev_mutex)
|
||
{
|
||
struct dp_netdev *dp;
|
||
int error;
|
||
|
||
dp = xzalloc(sizeof *dp);
|
||
shash_add(&dp_netdevs, name, dp);
|
||
|
||
*CONST_CAST(const struct dpif_class **, &dp->class) = class;
|
||
*CONST_CAST(const char **, &dp->name) = xstrdup(name);
|
||
ovs_refcount_init(&dp->ref_cnt);
|
||
atomic_flag_clear(&dp->destroyed);
|
||
|
||
ovs_mutex_init(&dp->port_mutex);
|
||
hmap_init(&dp->ports);
|
||
dp->port_seq = seq_create();
|
||
fat_rwlock_init(&dp->upcall_rwlock);
|
||
|
||
dp->reconfigure_seq = seq_create();
|
||
dp->last_reconfigure_seq = seq_read(dp->reconfigure_seq);
|
||
|
||
for (int i = 0; i < N_METER_LOCKS; ++i) {
|
||
ovs_mutex_init_adaptive(&dp->meter_locks[i]);
|
||
}
|
||
|
||
/* Disable upcalls by default. */
|
||
dp_netdev_disable_upcall(dp);
|
||
dp->upcall_aux = NULL;
|
||
dp->upcall_cb = NULL;
|
||
|
||
conntrack_init(&dp->conntrack);
|
||
|
||
atomic_init(&dp->emc_insert_min, DEFAULT_EM_FLOW_INSERT_MIN);
|
||
|
||
cmap_init(&dp->poll_threads);
|
||
|
||
ovs_mutex_init(&dp->tx_qid_pool_mutex);
|
||
/* We need 1 Tx queue for each possible core + 1 for non-PMD threads. */
|
||
dp->tx_qid_pool = id_pool_create(0, ovs_numa_get_n_cores() + 1);
|
||
|
||
ovs_mutex_init_recursive(&dp->non_pmd_mutex);
|
||
ovsthread_key_create(&dp->per_pmd_key, NULL);
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
/* non-PMD will be created before all other threads and will
|
||
* allocate static_tx_qid = 0. */
|
||
dp_netdev_set_nonpmd(dp);
|
||
|
||
error = do_add_port(dp, name, dpif_netdev_port_open_type(dp->class,
|
||
"internal"),
|
||
ODPP_LOCAL);
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
if (error) {
|
||
dp_netdev_free(dp);
|
||
return error;
|
||
}
|
||
|
||
dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
|
||
*dpp = dp;
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_request_reconfigure(struct dp_netdev *dp)
|
||
{
|
||
seq_change(dp->reconfigure_seq);
|
||
}
|
||
|
||
static bool
|
||
dp_netdev_is_reconf_required(struct dp_netdev *dp)
|
||
{
|
||
return seq_read(dp->reconfigure_seq) != dp->last_reconfigure_seq;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_open(const struct dpif_class *class, const char *name,
|
||
bool create, struct dpif **dpifp)
|
||
{
|
||
struct dp_netdev *dp;
|
||
int error;
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
dp = shash_find_data(&dp_netdevs, name);
|
||
if (!dp) {
|
||
error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
|
||
} else {
|
||
error = (dp->class != class ? EINVAL
|
||
: create ? EEXIST
|
||
: 0);
|
||
}
|
||
if (!error) {
|
||
*dpifp = create_dpif_netdev(dp);
|
||
dp->dpif = *dpifp;
|
||
}
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
/* Check that upcalls are disabled, i.e. that the rwlock is taken */
|
||
ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
|
||
|
||
/* Before freeing a lock we should release it */
|
||
fat_rwlock_unlock(&dp->upcall_rwlock);
|
||
fat_rwlock_destroy(&dp->upcall_rwlock);
|
||
}
|
||
|
||
static void
|
||
dp_delete_meter(struct dp_netdev *dp, uint32_t meter_id)
|
||
OVS_REQUIRES(dp->meter_locks[meter_id % N_METER_LOCKS])
|
||
{
|
||
if (dp->meters[meter_id]) {
|
||
free(dp->meters[meter_id]);
|
||
dp->meters[meter_id] = NULL;
|
||
}
|
||
}
|
||
|
||
/* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
|
||
* through the 'dp_netdevs' shash while freeing 'dp'. */
|
||
static void
|
||
dp_netdev_free(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp_netdev_mutex)
|
||
{
|
||
struct dp_netdev_port *port, *next;
|
||
|
||
shash_find_and_delete(&dp_netdevs, dp->name);
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
HMAP_FOR_EACH_SAFE (port, next, node, &dp->ports) {
|
||
do_del_port(dp, port);
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
dp_netdev_destroy_all_pmds(dp, true);
|
||
cmap_destroy(&dp->poll_threads);
|
||
|
||
ovs_mutex_destroy(&dp->tx_qid_pool_mutex);
|
||
id_pool_destroy(dp->tx_qid_pool);
|
||
|
||
ovs_mutex_destroy(&dp->non_pmd_mutex);
|
||
ovsthread_key_delete(dp->per_pmd_key);
|
||
|
||
conntrack_destroy(&dp->conntrack);
|
||
|
||
|
||
seq_destroy(dp->reconfigure_seq);
|
||
|
||
seq_destroy(dp->port_seq);
|
||
hmap_destroy(&dp->ports);
|
||
ovs_mutex_destroy(&dp->port_mutex);
|
||
|
||
/* Upcalls must be disabled at this point */
|
||
dp_netdev_destroy_upcall_lock(dp);
|
||
|
||
int i;
|
||
|
||
for (i = 0; i < MAX_METERS; ++i) {
|
||
meter_lock(dp, i);
|
||
dp_delete_meter(dp, i);
|
||
meter_unlock(dp, i);
|
||
}
|
||
for (i = 0; i < N_METER_LOCKS; ++i) {
|
||
ovs_mutex_destroy(&dp->meter_locks[i]);
|
||
}
|
||
|
||
free(dp->pmd_cmask);
|
||
free(CONST_CAST(char *, dp->name));
|
||
free(dp);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_unref(struct dp_netdev *dp)
|
||
{
|
||
if (dp) {
|
||
/* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
|
||
* get a new reference to 'dp' through the 'dp_netdevs' shash. */
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
|
||
dp_netdev_free(dp);
|
||
}
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_close(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
|
||
dp_netdev_unref(dp);
|
||
free(dpif);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_destroy(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
|
||
if (!atomic_flag_test_and_set(&dp->destroyed)) {
|
||
if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
|
||
/* Can't happen: 'dpif' still owns a reference to 'dp'. */
|
||
OVS_NOT_REACHED();
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Add 'n' to the atomic variable 'var' non-atomically and using relaxed
|
||
* load/store semantics. While the increment is not atomic, the load and
|
||
* store operations are, making it impossible to read inconsistent values.
|
||
*
|
||
* This is used to update thread local stats counters. */
|
||
static void
|
||
non_atomic_ullong_add(atomic_ullong *var, unsigned long long n)
|
||
{
|
||
unsigned long long tmp;
|
||
|
||
atomic_read_relaxed(var, &tmp);
|
||
tmp += n;
|
||
atomic_store_relaxed(var, tmp);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
|
||
stats->n_flows = stats->n_hit = stats->n_missed = stats->n_lost = 0;
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
unsigned long long n;
|
||
stats->n_flows += cmap_count(&pmd->flow_table);
|
||
|
||
atomic_read_relaxed(&pmd->stats.n[DP_STAT_MASKED_HIT], &n);
|
||
stats->n_hit += n;
|
||
atomic_read_relaxed(&pmd->stats.n[DP_STAT_EXACT_HIT], &n);
|
||
stats->n_hit += n;
|
||
atomic_read_relaxed(&pmd->stats.n[DP_STAT_MISS], &n);
|
||
stats->n_missed += n;
|
||
atomic_read_relaxed(&pmd->stats.n[DP_STAT_LOST], &n);
|
||
stats->n_lost += n;
|
||
}
|
||
stats->n_masks = UINT32_MAX;
|
||
stats->n_mask_hit = UINT64_MAX;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
if (pmd->core_id == NON_PMD_CORE_ID) {
|
||
ovs_mutex_lock(&pmd->dp->non_pmd_mutex);
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
pmd_load_cached_ports(pmd);
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
ovs_mutex_unlock(&pmd->dp->non_pmd_mutex);
|
||
return;
|
||
}
|
||
|
||
ovs_mutex_lock(&pmd->cond_mutex);
|
||
seq_change(pmd->reload_seq);
|
||
atomic_store_relaxed(&pmd->reload, true);
|
||
ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
|
||
ovs_mutex_unlock(&pmd->cond_mutex);
|
||
}
|
||
|
||
static uint32_t
|
||
hash_port_no(odp_port_t port_no)
|
||
{
|
||
return hash_int(odp_to_u32(port_no), 0);
|
||
}
|
||
|
||
static int
|
||
port_create(const char *devname, const char *type,
|
||
odp_port_t port_no, struct dp_netdev_port **portp)
|
||
{
|
||
struct netdev_saved_flags *sf;
|
||
struct dp_netdev_port *port;
|
||
enum netdev_flags flags;
|
||
struct netdev *netdev;
|
||
int error;
|
||
|
||
*portp = NULL;
|
||
|
||
/* Open and validate network device. */
|
||
error = netdev_open(devname, type, &netdev);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
/* XXX reject non-Ethernet devices */
|
||
|
||
netdev_get_flags(netdev, &flags);
|
||
if (flags & NETDEV_LOOPBACK) {
|
||
VLOG_ERR("%s: cannot add a loopback device", devname);
|
||
error = EINVAL;
|
||
goto out;
|
||
}
|
||
|
||
error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
|
||
if (error) {
|
||
VLOG_ERR("%s: cannot set promisc flag", devname);
|
||
goto out;
|
||
}
|
||
|
||
port = xzalloc(sizeof *port);
|
||
port->port_no = port_no;
|
||
port->netdev = netdev;
|
||
port->type = xstrdup(type);
|
||
port->sf = sf;
|
||
port->need_reconfigure = true;
|
||
ovs_mutex_init(&port->txq_used_mutex);
|
||
|
||
*portp = port;
|
||
|
||
return 0;
|
||
|
||
out:
|
||
netdev_close(netdev);
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
|
||
odp_port_t port_no)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
int error;
|
||
|
||
/* Reject devices already in 'dp'. */
|
||
if (!get_port_by_name(dp, devname, &port)) {
|
||
return EEXIST;
|
||
}
|
||
|
||
error = port_create(devname, type, port_no, &port);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
hmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
|
||
seq_change(dp->port_seq);
|
||
|
||
reconfigure_datapath(dp);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
|
||
odp_port_t *port_nop)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
|
||
const char *dpif_port;
|
||
odp_port_t port_no;
|
||
int error;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
|
||
if (*port_nop != ODPP_NONE) {
|
||
port_no = *port_nop;
|
||
error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
|
||
} else {
|
||
port_no = choose_port(dp, dpif_port);
|
||
error = port_no == ODPP_NONE ? EFBIG : 0;
|
||
}
|
||
if (!error) {
|
||
*port_nop = port_no;
|
||
error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
int error;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
if (port_no == ODPP_LOCAL) {
|
||
error = EINVAL;
|
||
} else {
|
||
struct dp_netdev_port *port;
|
||
|
||
error = get_port_by_number(dp, port_no, &port);
|
||
if (!error) {
|
||
do_del_port(dp, port);
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static bool
|
||
is_valid_port_number(odp_port_t port_no)
|
||
{
|
||
return port_no != ODPP_NONE;
|
||
}
|
||
|
||
static struct dp_netdev_port *
|
||
dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
|
||
HMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
|
||
if (port->port_no == port_no) {
|
||
return port;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
get_port_by_number(struct dp_netdev *dp,
|
||
odp_port_t port_no, struct dp_netdev_port **portp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
if (!is_valid_port_number(port_no)) {
|
||
*portp = NULL;
|
||
return EINVAL;
|
||
} else {
|
||
*portp = dp_netdev_lookup_port(dp, port_no);
|
||
return *portp ? 0 : ENODEV;
|
||
}
|
||
}
|
||
|
||
static void
|
||
port_destroy(struct dp_netdev_port *port)
|
||
{
|
||
if (!port) {
|
||
return;
|
||
}
|
||
|
||
netdev_close(port->netdev);
|
||
netdev_restore_flags(port->sf);
|
||
|
||
for (unsigned i = 0; i < port->n_rxq; i++) {
|
||
netdev_rxq_close(port->rxqs[i].rx);
|
||
}
|
||
ovs_mutex_destroy(&port->txq_used_mutex);
|
||
free(port->rxq_affinity_list);
|
||
free(port->txq_used);
|
||
free(port->rxqs);
|
||
free(port->type);
|
||
free(port);
|
||
}
|
||
|
||
static int
|
||
get_port_by_name(struct dp_netdev *dp,
|
||
const char *devname, struct dp_netdev_port **portp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (!strcmp(netdev_get_name(port->netdev), devname)) {
|
||
*portp = port;
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Callers of dpif_netdev_port_query_by_name() expect ENODEV for a non
|
||
* existing port. */
|
||
return ENODEV;
|
||
}
|
||
|
||
/* Returns 'true' if there is a port with pmd netdev. */
|
||
static bool
|
||
has_pmd_port(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (netdev_is_pmd(port->netdev)) {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
static void
|
||
do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
hmap_remove(&dp->ports, &port->node);
|
||
seq_change(dp->port_seq);
|
||
|
||
reconfigure_datapath(dp);
|
||
|
||
port_destroy(port);
|
||
}
|
||
|
||
static void
|
||
answer_port_query(const struct dp_netdev_port *port,
|
||
struct dpif_port *dpif_port)
|
||
{
|
||
dpif_port->name = xstrdup(netdev_get_name(port->netdev));
|
||
dpif_port->type = xstrdup(port->type);
|
||
dpif_port->port_no = port->port_no;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
|
||
struct dpif_port *dpif_port)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_port *port;
|
||
int error;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
error = get_port_by_number(dp, port_no, &port);
|
||
if (!error && dpif_port) {
|
||
answer_port_query(port, dpif_port);
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
|
||
struct dpif_port *dpif_port)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_port *port;
|
||
int error;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
error = get_port_by_name(dp, devname, &port);
|
||
if (!error && dpif_port) {
|
||
answer_port_query(port, dpif_port);
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_flow_free(struct dp_netdev_flow *flow)
|
||
{
|
||
dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
|
||
free(flow);
|
||
}
|
||
|
||
static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
|
||
{
|
||
if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
|
||
ovsrcu_postpone(dp_netdev_flow_free, flow);
|
||
}
|
||
}
|
||
|
||
static uint32_t
|
||
dp_netdev_flow_hash(const ovs_u128 *ufid)
|
||
{
|
||
return ufid->u32[0];
|
||
}
|
||
|
||
static inline struct dpcls *
|
||
dp_netdev_pmd_lookup_dpcls(struct dp_netdev_pmd_thread *pmd,
|
||
odp_port_t in_port)
|
||
{
|
||
struct dpcls *cls;
|
||
uint32_t hash = hash_port_no(in_port);
|
||
CMAP_FOR_EACH_WITH_HASH (cls, node, hash, &pmd->classifiers) {
|
||
if (cls->in_port == in_port) {
|
||
/* Port classifier exists already */
|
||
return cls;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static inline struct dpcls *
|
||
dp_netdev_pmd_find_dpcls(struct dp_netdev_pmd_thread *pmd,
|
||
odp_port_t in_port)
|
||
OVS_REQUIRES(pmd->flow_mutex)
|
||
{
|
||
struct dpcls *cls = dp_netdev_pmd_lookup_dpcls(pmd, in_port);
|
||
uint32_t hash = hash_port_no(in_port);
|
||
|
||
if (!cls) {
|
||
/* Create new classifier for in_port */
|
||
cls = xmalloc(sizeof(*cls));
|
||
dpcls_init(cls);
|
||
cls->in_port = in_port;
|
||
cmap_insert(&pmd->classifiers, &cls->node, hash);
|
||
VLOG_DBG("Creating dpcls %p for in_port %d", cls, in_port);
|
||
}
|
||
return cls;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_pmd_remove_flow(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_flow *flow)
|
||
OVS_REQUIRES(pmd->flow_mutex)
|
||
{
|
||
struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
|
||
struct dpcls *cls;
|
||
odp_port_t in_port = flow->flow.in_port.odp_port;
|
||
|
||
cls = dp_netdev_pmd_lookup_dpcls(pmd, in_port);
|
||
ovs_assert(cls != NULL);
|
||
dpcls_remove(cls, &flow->cr);
|
||
cmap_remove(&pmd->flow_table, node, dp_netdev_flow_hash(&flow->ufid));
|
||
flow->dead = true;
|
||
|
||
dp_netdev_flow_unref(flow);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
struct dp_netdev_flow *netdev_flow;
|
||
|
||
ovs_mutex_lock(&pmd->flow_mutex);
|
||
CMAP_FOR_EACH (netdev_flow, node, &pmd->flow_table) {
|
||
dp_netdev_pmd_remove_flow(pmd, netdev_flow);
|
||
}
|
||
ovs_mutex_unlock(&pmd->flow_mutex);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_flush(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
dp_netdev_pmd_flow_flush(pmd);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
struct dp_netdev_port_state {
|
||
struct hmap_position position;
|
||
char *name;
|
||
};
|
||
|
||
static int
|
||
dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
|
||
{
|
||
*statep = xzalloc(sizeof(struct dp_netdev_port_state));
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
|
||
struct dpif_port *dpif_port)
|
||
{
|
||
struct dp_netdev_port_state *state = state_;
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct hmap_node *node;
|
||
int retval;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
node = hmap_at_position(&dp->ports, &state->position);
|
||
if (node) {
|
||
struct dp_netdev_port *port;
|
||
|
||
port = CONTAINER_OF(node, struct dp_netdev_port, node);
|
||
|
||
free(state->name);
|
||
state->name = xstrdup(netdev_get_name(port->netdev));
|
||
dpif_port->name = state->name;
|
||
dpif_port->type = port->type;
|
||
dpif_port->port_no = port->port_no;
|
||
|
||
retval = 0;
|
||
} else {
|
||
retval = EOF;
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
return retval;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
|
||
{
|
||
struct dp_netdev_port_state *state = state_;
|
||
free(state->name);
|
||
free(state);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
|
||
{
|
||
struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
|
||
uint64_t new_port_seq;
|
||
int error;
|
||
|
||
new_port_seq = seq_read(dpif->dp->port_seq);
|
||
if (dpif->last_port_seq != new_port_seq) {
|
||
dpif->last_port_seq = new_port_seq;
|
||
error = ENOBUFS;
|
||
} else {
|
||
error = EAGAIN;
|
||
}
|
||
|
||
return error;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_port_poll_wait(const struct dpif *dpif_)
|
||
{
|
||
struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
|
||
|
||
seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
|
||
}
|
||
|
||
static struct dp_netdev_flow *
|
||
dp_netdev_flow_cast(const struct dpcls_rule *cr)
|
||
{
|
||
return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
|
||
}
|
||
|
||
static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
|
||
{
|
||
return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
|
||
}
|
||
|
||
/* netdev_flow_key utilities.
|
||
*
|
||
* netdev_flow_key is basically a miniflow. We use these functions
|
||
* (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
|
||
* functions (miniflow_clone_inline, miniflow_equal, ...), because:
|
||
*
|
||
* - Since we are dealing exclusively with miniflows created by
|
||
* miniflow_extract(), if the map is different the miniflow is different.
|
||
* Therefore we can be faster by comparing the map and the miniflow in a
|
||
* single memcmp().
|
||
* - These functions can be inlined by the compiler. */
|
||
|
||
/* Given the number of bits set in miniflow's maps, returns the size of the
|
||
* 'netdev_flow_key.mf' */
|
||
static inline size_t
|
||
netdev_flow_key_size(size_t flow_u64s)
|
||
{
|
||
return sizeof(struct miniflow) + MINIFLOW_VALUES_SIZE(flow_u64s);
|
||
}
|
||
|
||
static inline bool
|
||
netdev_flow_key_equal(const struct netdev_flow_key *a,
|
||
const struct netdev_flow_key *b)
|
||
{
|
||
/* 'b->len' may be not set yet. */
|
||
return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
|
||
}
|
||
|
||
/* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
|
||
* The maps are compared bitwise, so both 'key->mf' and 'mf' must have been
|
||
* generated by miniflow_extract. */
|
||
static inline bool
|
||
netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
|
||
const struct miniflow *mf)
|
||
{
|
||
return !memcmp(&key->mf, mf, key->len);
|
||
}
|
||
|
||
static inline void
|
||
netdev_flow_key_clone(struct netdev_flow_key *dst,
|
||
const struct netdev_flow_key *src)
|
||
{
|
||
memcpy(dst, src,
|
||
offsetof(struct netdev_flow_key, mf) + src->len);
|
||
}
|
||
|
||
/* Initialize a netdev_flow_key 'mask' from 'match'. */
|
||
static inline void
|
||
netdev_flow_mask_init(struct netdev_flow_key *mask,
|
||
const struct match *match)
|
||
{
|
||
uint64_t *dst = miniflow_values(&mask->mf);
|
||
struct flowmap fmap;
|
||
uint32_t hash = 0;
|
||
size_t idx;
|
||
|
||
/* Only check masks that make sense for the flow. */
|
||
flow_wc_map(&match->flow, &fmap);
|
||
flowmap_init(&mask->mf.map);
|
||
|
||
FLOWMAP_FOR_EACH_INDEX(idx, fmap) {
|
||
uint64_t mask_u64 = flow_u64_value(&match->wc.masks, idx);
|
||
|
||
if (mask_u64) {
|
||
flowmap_set(&mask->mf.map, idx, 1);
|
||
*dst++ = mask_u64;
|
||
hash = hash_add64(hash, mask_u64);
|
||
}
|
||
}
|
||
|
||
map_t map;
|
||
|
||
FLOWMAP_FOR_EACH_MAP (map, mask->mf.map) {
|
||
hash = hash_add64(hash, map);
|
||
}
|
||
|
||
size_t n = dst - miniflow_get_values(&mask->mf);
|
||
|
||
mask->hash = hash_finish(hash, n * 8);
|
||
mask->len = netdev_flow_key_size(n);
|
||
}
|
||
|
||
/* Initializes 'dst' as a copy of 'flow' masked with 'mask'. */
|
||
static inline void
|
||
netdev_flow_key_init_masked(struct netdev_flow_key *dst,
|
||
const struct flow *flow,
|
||
const struct netdev_flow_key *mask)
|
||
{
|
||
uint64_t *dst_u64 = miniflow_values(&dst->mf);
|
||
const uint64_t *mask_u64 = miniflow_get_values(&mask->mf);
|
||
uint32_t hash = 0;
|
||
uint64_t value;
|
||
|
||
dst->len = mask->len;
|
||
dst->mf = mask->mf; /* Copy maps. */
|
||
|
||
FLOW_FOR_EACH_IN_MAPS(value, flow, mask->mf.map) {
|
||
*dst_u64 = value & *mask_u64++;
|
||
hash = hash_add64(hash, *dst_u64++);
|
||
}
|
||
dst->hash = hash_finish(hash,
|
||
(dst_u64 - miniflow_get_values(&dst->mf)) * 8);
|
||
}
|
||
|
||
/* Iterate through netdev_flow_key TNL u64 values specified by 'FLOWMAP'. */
|
||
#define NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(VALUE, KEY, FLOWMAP) \
|
||
MINIFLOW_FOR_EACH_IN_FLOWMAP(VALUE, &(KEY)->mf, FLOWMAP)
|
||
|
||
/* Returns a hash value for the bits of 'key' where there are 1-bits in
|
||
* 'mask'. */
|
||
static inline uint32_t
|
||
netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
|
||
const struct netdev_flow_key *mask)
|
||
{
|
||
const uint64_t *p = miniflow_get_values(&mask->mf);
|
||
uint32_t hash = 0;
|
||
uint64_t value;
|
||
|
||
NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value, key, mask->mf.map) {
|
||
hash = hash_add64(hash, value & *p++);
|
||
}
|
||
|
||
return hash_finish(hash, (p - miniflow_get_values(&mask->mf)) * 8);
|
||
}
|
||
|
||
static inline bool
|
||
emc_entry_alive(struct emc_entry *ce)
|
||
{
|
||
return ce->flow && !ce->flow->dead;
|
||
}
|
||
|
||
static void
|
||
emc_clear_entry(struct emc_entry *ce)
|
||
{
|
||
if (ce->flow) {
|
||
dp_netdev_flow_unref(ce->flow);
|
||
ce->flow = NULL;
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
|
||
const struct netdev_flow_key *key)
|
||
{
|
||
if (ce->flow != flow) {
|
||
if (ce->flow) {
|
||
dp_netdev_flow_unref(ce->flow);
|
||
}
|
||
|
||
if (dp_netdev_flow_ref(flow)) {
|
||
ce->flow = flow;
|
||
} else {
|
||
ce->flow = NULL;
|
||
}
|
||
}
|
||
if (key) {
|
||
netdev_flow_key_clone(&ce->key, key);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
|
||
struct dp_netdev_flow *flow)
|
||
{
|
||
struct emc_entry *to_be_replaced = NULL;
|
||
struct emc_entry *current_entry;
|
||
|
||
EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
|
||
if (netdev_flow_key_equal(¤t_entry->key, key)) {
|
||
/* We found the entry with the 'mf' miniflow */
|
||
emc_change_entry(current_entry, flow, NULL);
|
||
return;
|
||
}
|
||
|
||
/* Replacement policy: put the flow in an empty (not alive) entry, or
|
||
* in the first entry where it can be */
|
||
if (!to_be_replaced
|
||
|| (emc_entry_alive(to_be_replaced)
|
||
&& !emc_entry_alive(current_entry))
|
||
|| current_entry->key.hash < to_be_replaced->key.hash) {
|
||
to_be_replaced = current_entry;
|
||
}
|
||
}
|
||
/* We didn't find the miniflow in the cache.
|
||
* The 'to_be_replaced' entry is where the new flow will be stored */
|
||
|
||
emc_change_entry(to_be_replaced, flow, key);
|
||
}
|
||
|
||
static inline void
|
||
emc_probabilistic_insert(struct dp_netdev_pmd_thread *pmd,
|
||
const struct netdev_flow_key *key,
|
||
struct dp_netdev_flow *flow)
|
||
{
|
||
/* Insert an entry into the EMC based on probability value 'min'. By
|
||
* default the value is UINT32_MAX / 100 which yields an insertion
|
||
* probability of 1/100 ie. 1% */
|
||
|
||
uint32_t min;
|
||
atomic_read_relaxed(&pmd->dp->emc_insert_min, &min);
|
||
|
||
if (min && random_uint32() <= min) {
|
||
emc_insert(&pmd->flow_cache, key, flow);
|
||
}
|
||
}
|
||
|
||
static inline struct dp_netdev_flow *
|
||
emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
|
||
{
|
||
struct emc_entry *current_entry;
|
||
|
||
EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
|
||
if (current_entry->key.hash == key->hash
|
||
&& emc_entry_alive(current_entry)
|
||
&& netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
|
||
|
||
/* We found the entry with the 'key->mf' miniflow */
|
||
return current_entry->flow;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static struct dp_netdev_flow *
|
||
dp_netdev_pmd_lookup_flow(struct dp_netdev_pmd_thread *pmd,
|
||
const struct netdev_flow_key *key,
|
||
int *lookup_num_p)
|
||
{
|
||
struct dpcls *cls;
|
||
struct dpcls_rule *rule;
|
||
odp_port_t in_port = u32_to_odp(MINIFLOW_GET_U32(&key->mf, in_port));
|
||
struct dp_netdev_flow *netdev_flow = NULL;
|
||
|
||
cls = dp_netdev_pmd_lookup_dpcls(pmd, in_port);
|
||
if (OVS_LIKELY(cls)) {
|
||
dpcls_lookup(cls, key, &rule, 1, lookup_num_p);
|
||
netdev_flow = dp_netdev_flow_cast(rule);
|
||
}
|
||
return netdev_flow;
|
||
}
|
||
|
||
static struct dp_netdev_flow *
|
||
dp_netdev_pmd_find_flow(const struct dp_netdev_pmd_thread *pmd,
|
||
const ovs_u128 *ufidp, const struct nlattr *key,
|
||
size_t key_len)
|
||
{
|
||
struct dp_netdev_flow *netdev_flow;
|
||
struct flow flow;
|
||
ovs_u128 ufid;
|
||
|
||
/* If a UFID is not provided, determine one based on the key. */
|
||
if (!ufidp && key && key_len
|
||
&& !dpif_netdev_flow_from_nlattrs(key, key_len, &flow, false)) {
|
||
dpif_flow_hash(pmd->dp->dpif, &flow, sizeof flow, &ufid);
|
||
ufidp = &ufid;
|
||
}
|
||
|
||
if (ufidp) {
|
||
CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, dp_netdev_flow_hash(ufidp),
|
||
&pmd->flow_table) {
|
||
if (ovs_u128_equals(netdev_flow->ufid, *ufidp)) {
|
||
return netdev_flow;
|
||
}
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow_,
|
||
struct dpif_flow_stats *stats)
|
||
{
|
||
struct dp_netdev_flow *netdev_flow;
|
||
unsigned long long n;
|
||
long long used;
|
||
uint16_t flags;
|
||
|
||
netdev_flow = CONST_CAST(struct dp_netdev_flow *, netdev_flow_);
|
||
|
||
atomic_read_relaxed(&netdev_flow->stats.packet_count, &n);
|
||
stats->n_packets = n;
|
||
atomic_read_relaxed(&netdev_flow->stats.byte_count, &n);
|
||
stats->n_bytes = n;
|
||
atomic_read_relaxed(&netdev_flow->stats.used, &used);
|
||
stats->used = used;
|
||
atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
|
||
stats->tcp_flags = flags;
|
||
}
|
||
|
||
/* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
|
||
* storing the netlink-formatted key/mask. 'key_buf' may be the same as
|
||
* 'mask_buf'. Actions will be returned without copying, by relying on RCU to
|
||
* protect them. */
|
||
static void
|
||
dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
|
||
struct ofpbuf *key_buf, struct ofpbuf *mask_buf,
|
||
struct dpif_flow *flow, bool terse)
|
||
{
|
||
if (terse) {
|
||
memset(flow, 0, sizeof *flow);
|
||
} else {
|
||
struct flow_wildcards wc;
|
||
struct dp_netdev_actions *actions;
|
||
size_t offset;
|
||
struct odp_flow_key_parms odp_parms = {
|
||
.flow = &netdev_flow->flow,
|
||
.mask = &wc.masks,
|
||
.support = dp_netdev_support,
|
||
};
|
||
|
||
miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
|
||
/* in_port is exact matched, but we have left it out from the mask for
|
||
* optimnization reasons. Add in_port back to the mask. */
|
||
wc.masks.in_port.odp_port = ODPP_NONE;
|
||
|
||
/* Key */
|
||
offset = key_buf->size;
|
||
flow->key = ofpbuf_tail(key_buf);
|
||
odp_flow_key_from_flow(&odp_parms, key_buf);
|
||
flow->key_len = key_buf->size - offset;
|
||
|
||
/* Mask */
|
||
offset = mask_buf->size;
|
||
flow->mask = ofpbuf_tail(mask_buf);
|
||
odp_parms.key_buf = key_buf;
|
||
odp_flow_key_from_mask(&odp_parms, mask_buf);
|
||
flow->mask_len = mask_buf->size - offset;
|
||
|
||
/* Actions */
|
||
actions = dp_netdev_flow_get_actions(netdev_flow);
|
||
flow->actions = actions->actions;
|
||
flow->actions_len = actions->size;
|
||
}
|
||
|
||
flow->ufid = netdev_flow->ufid;
|
||
flow->ufid_present = true;
|
||
flow->pmd_id = netdev_flow->pmd_id;
|
||
get_dpif_flow_stats(netdev_flow, &flow->stats);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
|
||
const struct nlattr *mask_key,
|
||
uint32_t mask_key_len, const struct flow *flow,
|
||
struct flow_wildcards *wc, bool probe)
|
||
{
|
||
enum odp_key_fitness fitness;
|
||
|
||
fitness = odp_flow_key_to_mask(mask_key, mask_key_len, wc, flow);
|
||
if (fitness) {
|
||
if (!probe) {
|
||
/* This should not happen: it indicates that
|
||
* odp_flow_key_from_mask() and odp_flow_key_to_mask()
|
||
* disagree on the acceptable form of a mask. Log the problem
|
||
* as an error, with enough details to enable debugging. */
|
||
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
|
||
|
||
if (!VLOG_DROP_ERR(&rl)) {
|
||
struct ds s;
|
||
|
||
ds_init(&s);
|
||
odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
|
||
true);
|
||
VLOG_ERR("internal error parsing flow mask %s (%s)",
|
||
ds_cstr(&s), odp_key_fitness_to_string(fitness));
|
||
ds_destroy(&s);
|
||
}
|
||
}
|
||
|
||
return EINVAL;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
|
||
struct flow *flow, bool probe)
|
||
{
|
||
if (odp_flow_key_to_flow(key, key_len, flow)) {
|
||
if (!probe) {
|
||
/* This should not happen: it indicates that
|
||
* odp_flow_key_from_flow() and odp_flow_key_to_flow() disagree on
|
||
* the acceptable form of a flow. Log the problem as an error,
|
||
* with enough details to enable debugging. */
|
||
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
|
||
|
||
if (!VLOG_DROP_ERR(&rl)) {
|
||
struct ds s;
|
||
|
||
ds_init(&s);
|
||
odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
|
||
VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
|
||
ds_destroy(&s);
|
||
}
|
||
}
|
||
|
||
return EINVAL;
|
||
}
|
||
|
||
if (flow->ct_state & DP_NETDEV_CS_UNSUPPORTED_MASK) {
|
||
return EINVAL;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_flow *netdev_flow;
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct hmapx to_find = HMAPX_INITIALIZER(&to_find);
|
||
struct hmapx_node *node;
|
||
int error = EINVAL;
|
||
|
||
if (get->pmd_id == PMD_ID_NULL) {
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (dp_netdev_pmd_try_ref(pmd) && !hmapx_add(&to_find, pmd)) {
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
}
|
||
} else {
|
||
pmd = dp_netdev_get_pmd(dp, get->pmd_id);
|
||
if (!pmd) {
|
||
goto out;
|
||
}
|
||
hmapx_add(&to_find, pmd);
|
||
}
|
||
|
||
if (!hmapx_count(&to_find)) {
|
||
goto out;
|
||
}
|
||
|
||
HMAPX_FOR_EACH (node, &to_find) {
|
||
pmd = (struct dp_netdev_pmd_thread *) node->data;
|
||
netdev_flow = dp_netdev_pmd_find_flow(pmd, get->ufid, get->key,
|
||
get->key_len);
|
||
if (netdev_flow) {
|
||
dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->buffer,
|
||
get->flow, false);
|
||
error = 0;
|
||
break;
|
||
} else {
|
||
error = ENOENT;
|
||
}
|
||
}
|
||
|
||
HMAPX_FOR_EACH (node, &to_find) {
|
||
pmd = (struct dp_netdev_pmd_thread *) node->data;
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
out:
|
||
hmapx_destroy(&to_find);
|
||
return error;
|
||
}
|
||
|
||
static struct dp_netdev_flow *
|
||
dp_netdev_flow_add(struct dp_netdev_pmd_thread *pmd,
|
||
struct match *match, const ovs_u128 *ufid,
|
||
const struct nlattr *actions, size_t actions_len)
|
||
OVS_REQUIRES(pmd->flow_mutex)
|
||
{
|
||
struct dp_netdev_flow *flow;
|
||
struct netdev_flow_key mask;
|
||
struct dpcls *cls;
|
||
|
||
/* Make sure in_port is exact matched before we read it. */
|
||
ovs_assert(match->wc.masks.in_port.odp_port == ODPP_NONE);
|
||
odp_port_t in_port = match->flow.in_port.odp_port;
|
||
|
||
/* As we select the dpcls based on the port number, each netdev flow
|
||
* belonging to the same dpcls will have the same odp_port value.
|
||
* For performance reasons we wildcard odp_port here in the mask. In the
|
||
* typical case dp_hash is also wildcarded, and the resulting 8-byte
|
||
* chunk {dp_hash, in_port} will be ignored by netdev_flow_mask_init() and
|
||
* will not be part of the subtable mask.
|
||
* This will speed up the hash computation during dpcls_lookup() because
|
||
* there is one less call to hash_add64() in this case. */
|
||
match->wc.masks.in_port.odp_port = 0;
|
||
netdev_flow_mask_init(&mask, match);
|
||
match->wc.masks.in_port.odp_port = ODPP_NONE;
|
||
|
||
/* Make sure wc does not have metadata. */
|
||
ovs_assert(!FLOWMAP_HAS_FIELD(&mask.mf.map, metadata)
|
||
&& !FLOWMAP_HAS_FIELD(&mask.mf.map, regs));
|
||
|
||
/* Do not allocate extra space. */
|
||
flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
|
||
memset(&flow->stats, 0, sizeof flow->stats);
|
||
flow->dead = false;
|
||
flow->batch = NULL;
|
||
*CONST_CAST(unsigned *, &flow->pmd_id) = pmd->core_id;
|
||
*CONST_CAST(struct flow *, &flow->flow) = match->flow;
|
||
*CONST_CAST(ovs_u128 *, &flow->ufid) = *ufid;
|
||
ovs_refcount_init(&flow->ref_cnt);
|
||
ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
|
||
|
||
netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
|
||
|
||
/* Select dpcls for in_port. Relies on in_port to be exact match. */
|
||
cls = dp_netdev_pmd_find_dpcls(pmd, in_port);
|
||
dpcls_insert(cls, &flow->cr, &mask);
|
||
|
||
cmap_insert(&pmd->flow_table, CONST_CAST(struct cmap_node *, &flow->node),
|
||
dp_netdev_flow_hash(&flow->ufid));
|
||
|
||
if (OVS_UNLIKELY(!VLOG_DROP_DBG((&upcall_rl)))) {
|
||
struct ds ds = DS_EMPTY_INITIALIZER;
|
||
struct ofpbuf key_buf, mask_buf;
|
||
struct odp_flow_key_parms odp_parms = {
|
||
.flow = &match->flow,
|
||
.mask = &match->wc.masks,
|
||
.support = dp_netdev_support,
|
||
};
|
||
|
||
ofpbuf_init(&key_buf, 0);
|
||
ofpbuf_init(&mask_buf, 0);
|
||
|
||
odp_flow_key_from_flow(&odp_parms, &key_buf);
|
||
odp_parms.key_buf = &key_buf;
|
||
odp_flow_key_from_mask(&odp_parms, &mask_buf);
|
||
|
||
ds_put_cstr(&ds, "flow_add: ");
|
||
odp_format_ufid(ufid, &ds);
|
||
ds_put_cstr(&ds, " ");
|
||
odp_flow_format(key_buf.data, key_buf.size,
|
||
mask_buf.data, mask_buf.size,
|
||
NULL, &ds, false);
|
||
ds_put_cstr(&ds, ", actions:");
|
||
format_odp_actions(&ds, actions, actions_len, NULL);
|
||
|
||
VLOG_DBG("%s", ds_cstr(&ds));
|
||
|
||
ofpbuf_uninit(&key_buf);
|
||
ofpbuf_uninit(&mask_buf);
|
||
|
||
/* Add a printout of the actual match installed. */
|
||
struct match m;
|
||
ds_clear(&ds);
|
||
ds_put_cstr(&ds, "flow match: ");
|
||
miniflow_expand(&flow->cr.flow.mf, &m.flow);
|
||
miniflow_expand(&flow->cr.mask->mf, &m.wc.masks);
|
||
memset(&m.tun_md, 0, sizeof m.tun_md);
|
||
match_format(&m, NULL, &ds, OFP_DEFAULT_PRIORITY);
|
||
|
||
VLOG_DBG("%s", ds_cstr(&ds));
|
||
|
||
ds_destroy(&ds);
|
||
}
|
||
|
||
return flow;
|
||
}
|
||
|
||
static int
|
||
flow_put_on_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct netdev_flow_key *key,
|
||
struct match *match,
|
||
ovs_u128 *ufid,
|
||
const struct dpif_flow_put *put,
|
||
struct dpif_flow_stats *stats)
|
||
{
|
||
struct dp_netdev_flow *netdev_flow;
|
||
int error = 0;
|
||
|
||
if (stats) {
|
||
memset(stats, 0, sizeof *stats);
|
||
}
|
||
|
||
ovs_mutex_lock(&pmd->flow_mutex);
|
||
netdev_flow = dp_netdev_pmd_lookup_flow(pmd, key, NULL);
|
||
if (!netdev_flow) {
|
||
if (put->flags & DPIF_FP_CREATE) {
|
||
if (cmap_count(&pmd->flow_table) < MAX_FLOWS) {
|
||
dp_netdev_flow_add(pmd, match, ufid, put->actions,
|
||
put->actions_len);
|
||
error = 0;
|
||
} else {
|
||
error = EFBIG;
|
||
}
|
||
} else {
|
||
error = ENOENT;
|
||
}
|
||
} else {
|
||
if (put->flags & DPIF_FP_MODIFY) {
|
||
struct dp_netdev_actions *new_actions;
|
||
struct dp_netdev_actions *old_actions;
|
||
|
||
new_actions = dp_netdev_actions_create(put->actions,
|
||
put->actions_len);
|
||
|
||
old_actions = dp_netdev_flow_get_actions(netdev_flow);
|
||
ovsrcu_set(&netdev_flow->actions, new_actions);
|
||
|
||
if (stats) {
|
||
get_dpif_flow_stats(netdev_flow, stats);
|
||
}
|
||
if (put->flags & DPIF_FP_ZERO_STATS) {
|
||
/* XXX: The userspace datapath uses thread local statistics
|
||
* (for flows), which should be updated only by the owning
|
||
* thread. Since we cannot write on stats memory here,
|
||
* we choose not to support this flag. Please note:
|
||
* - This feature is currently used only by dpctl commands with
|
||
* option --clear.
|
||
* - Should the need arise, this operation can be implemented
|
||
* by keeping a base value (to be update here) for each
|
||
* counter, and subtracting it before outputting the stats */
|
||
error = EOPNOTSUPP;
|
||
}
|
||
|
||
ovsrcu_postpone(dp_netdev_actions_free, old_actions);
|
||
} else if (put->flags & DPIF_FP_CREATE) {
|
||
error = EEXIST;
|
||
} else {
|
||
/* Overlapping flow. */
|
||
error = EINVAL;
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&pmd->flow_mutex);
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct netdev_flow_key key, mask;
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct match match;
|
||
ovs_u128 ufid;
|
||
int error;
|
||
bool probe = put->flags & DPIF_FP_PROBE;
|
||
|
||
if (put->stats) {
|
||
memset(put->stats, 0, sizeof *put->stats);
|
||
}
|
||
error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow,
|
||
probe);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
|
||
put->mask, put->mask_len,
|
||
&match.flow, &match.wc, probe);
|
||
if (error) {
|
||
return error;
|
||
}
|
||
|
||
if (put->ufid) {
|
||
ufid = *put->ufid;
|
||
} else {
|
||
dpif_flow_hash(dpif, &match.flow, sizeof match.flow, &ufid);
|
||
}
|
||
|
||
/* Must produce a netdev_flow_key for lookup.
|
||
* Use the same method as employed to create the key when adding
|
||
* the flow to the dplcs to make sure they match. */
|
||
netdev_flow_mask_init(&mask, &match);
|
||
netdev_flow_key_init_masked(&key, &match.flow, &mask);
|
||
|
||
if (put->pmd_id == PMD_ID_NULL) {
|
||
if (cmap_count(&dp->poll_threads) == 0) {
|
||
return EINVAL;
|
||
}
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
struct dpif_flow_stats pmd_stats;
|
||
int pmd_error;
|
||
|
||
pmd_error = flow_put_on_pmd(pmd, &key, &match, &ufid, put,
|
||
&pmd_stats);
|
||
if (pmd_error) {
|
||
error = pmd_error;
|
||
} else if (put->stats) {
|
||
put->stats->n_packets += pmd_stats.n_packets;
|
||
put->stats->n_bytes += pmd_stats.n_bytes;
|
||
put->stats->used = MAX(put->stats->used, pmd_stats.used);
|
||
put->stats->tcp_flags |= pmd_stats.tcp_flags;
|
||
}
|
||
}
|
||
} else {
|
||
pmd = dp_netdev_get_pmd(dp, put->pmd_id);
|
||
if (!pmd) {
|
||
return EINVAL;
|
||
}
|
||
error = flow_put_on_pmd(pmd, &key, &match, &ufid, put, put->stats);
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
flow_del_on_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dpif_flow_stats *stats,
|
||
const struct dpif_flow_del *del)
|
||
{
|
||
struct dp_netdev_flow *netdev_flow;
|
||
int error = 0;
|
||
|
||
ovs_mutex_lock(&pmd->flow_mutex);
|
||
netdev_flow = dp_netdev_pmd_find_flow(pmd, del->ufid, del->key,
|
||
del->key_len);
|
||
if (netdev_flow) {
|
||
if (stats) {
|
||
get_dpif_flow_stats(netdev_flow, stats);
|
||
}
|
||
dp_netdev_pmd_remove_flow(pmd, netdev_flow);
|
||
} else {
|
||
error = ENOENT;
|
||
}
|
||
ovs_mutex_unlock(&pmd->flow_mutex);
|
||
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
int error = 0;
|
||
|
||
if (del->stats) {
|
||
memset(del->stats, 0, sizeof *del->stats);
|
||
}
|
||
|
||
if (del->pmd_id == PMD_ID_NULL) {
|
||
if (cmap_count(&dp->poll_threads) == 0) {
|
||
return EINVAL;
|
||
}
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
struct dpif_flow_stats pmd_stats;
|
||
int pmd_error;
|
||
|
||
pmd_error = flow_del_on_pmd(pmd, &pmd_stats, del);
|
||
if (pmd_error) {
|
||
error = pmd_error;
|
||
} else if (del->stats) {
|
||
del->stats->n_packets += pmd_stats.n_packets;
|
||
del->stats->n_bytes += pmd_stats.n_bytes;
|
||
del->stats->used = MAX(del->stats->used, pmd_stats.used);
|
||
del->stats->tcp_flags |= pmd_stats.tcp_flags;
|
||
}
|
||
}
|
||
} else {
|
||
pmd = dp_netdev_get_pmd(dp, del->pmd_id);
|
||
if (!pmd) {
|
||
return EINVAL;
|
||
}
|
||
error = flow_del_on_pmd(pmd, del->stats, del);
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
|
||
|
||
return error;
|
||
}
|
||
|
||
struct dpif_netdev_flow_dump {
|
||
struct dpif_flow_dump up;
|
||
struct cmap_position poll_thread_pos;
|
||
struct cmap_position flow_pos;
|
||
struct dp_netdev_pmd_thread *cur_pmd;
|
||
int status;
|
||
struct ovs_mutex mutex;
|
||
};
|
||
|
||
static struct dpif_netdev_flow_dump *
|
||
dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
|
||
{
|
||
return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
|
||
}
|
||
|
||
static struct dpif_flow_dump *
|
||
dpif_netdev_flow_dump_create(const struct dpif *dpif_, bool terse,
|
||
char *type OVS_UNUSED)
|
||
{
|
||
struct dpif_netdev_flow_dump *dump;
|
||
|
||
dump = xzalloc(sizeof *dump);
|
||
dpif_flow_dump_init(&dump->up, dpif_);
|
||
dump->up.terse = terse;
|
||
ovs_mutex_init(&dump->mutex);
|
||
|
||
return &dump->up;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
|
||
{
|
||
struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
|
||
|
||
ovs_mutex_destroy(&dump->mutex);
|
||
free(dump);
|
||
return 0;
|
||
}
|
||
|
||
struct dpif_netdev_flow_dump_thread {
|
||
struct dpif_flow_dump_thread up;
|
||
struct dpif_netdev_flow_dump *dump;
|
||
struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
|
||
struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
|
||
};
|
||
|
||
static struct dpif_netdev_flow_dump_thread *
|
||
dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
|
||
{
|
||
return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
|
||
}
|
||
|
||
static struct dpif_flow_dump_thread *
|
||
dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
|
||
{
|
||
struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
|
||
struct dpif_netdev_flow_dump_thread *thread;
|
||
|
||
thread = xmalloc(sizeof *thread);
|
||
dpif_flow_dump_thread_init(&thread->up, &dump->up);
|
||
thread->dump = dump;
|
||
return &thread->up;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
|
||
{
|
||
struct dpif_netdev_flow_dump_thread *thread
|
||
= dpif_netdev_flow_dump_thread_cast(thread_);
|
||
|
||
free(thread);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
|
||
struct dpif_flow *flows, int max_flows)
|
||
{
|
||
struct dpif_netdev_flow_dump_thread *thread
|
||
= dpif_netdev_flow_dump_thread_cast(thread_);
|
||
struct dpif_netdev_flow_dump *dump = thread->dump;
|
||
struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
|
||
int n_flows = 0;
|
||
int i;
|
||
|
||
ovs_mutex_lock(&dump->mutex);
|
||
if (!dump->status) {
|
||
struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
|
||
struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
|
||
struct dp_netdev_pmd_thread *pmd = dump->cur_pmd;
|
||
int flow_limit = MIN(max_flows, FLOW_DUMP_MAX_BATCH);
|
||
|
||
/* First call to dump_next(), extracts the first pmd thread.
|
||
* If there is no pmd thread, returns immediately. */
|
||
if (!pmd) {
|
||
pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
|
||
if (!pmd) {
|
||
ovs_mutex_unlock(&dump->mutex);
|
||
return n_flows;
|
||
|
||
}
|
||
}
|
||
|
||
do {
|
||
for (n_flows = 0; n_flows < flow_limit; n_flows++) {
|
||
struct cmap_node *node;
|
||
|
||
node = cmap_next_position(&pmd->flow_table, &dump->flow_pos);
|
||
if (!node) {
|
||
break;
|
||
}
|
||
netdev_flows[n_flows] = CONTAINER_OF(node,
|
||
struct dp_netdev_flow,
|
||
node);
|
||
}
|
||
/* When finishing dumping the current pmd thread, moves to
|
||
* the next. */
|
||
if (n_flows < flow_limit) {
|
||
memset(&dump->flow_pos, 0, sizeof dump->flow_pos);
|
||
dp_netdev_pmd_unref(pmd);
|
||
pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
|
||
if (!pmd) {
|
||
dump->status = EOF;
|
||
break;
|
||
}
|
||
}
|
||
/* Keeps the reference to next caller. */
|
||
dump->cur_pmd = pmd;
|
||
|
||
/* If the current dump is empty, do not exit the loop, since the
|
||
* remaining pmds could have flows to be dumped. Just dumps again
|
||
* on the new 'pmd'. */
|
||
} while (!n_flows);
|
||
}
|
||
ovs_mutex_unlock(&dump->mutex);
|
||
|
||
for (i = 0; i < n_flows; i++) {
|
||
struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
|
||
struct odputil_keybuf *keybuf = &thread->keybuf[i];
|
||
struct dp_netdev_flow *netdev_flow = netdev_flows[i];
|
||
struct dpif_flow *f = &flows[i];
|
||
struct ofpbuf key, mask;
|
||
|
||
ofpbuf_use_stack(&key, keybuf, sizeof *keybuf);
|
||
ofpbuf_use_stack(&mask, maskbuf, sizeof *maskbuf);
|
||
dp_netdev_flow_to_dpif_flow(netdev_flow, &key, &mask, f,
|
||
dump->up.terse);
|
||
}
|
||
|
||
return n_flows;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct dp_packet_batch pp;
|
||
|
||
if (dp_packet_size(execute->packet) < ETH_HEADER_LEN ||
|
||
dp_packet_size(execute->packet) > UINT16_MAX) {
|
||
return EINVAL;
|
||
}
|
||
|
||
/* Tries finding the 'pmd'. If NULL is returned, that means
|
||
* the current thread is a non-pmd thread and should use
|
||
* dp_netdev_get_pmd(dp, NON_PMD_CORE_ID). */
|
||
pmd = ovsthread_getspecific(dp->per_pmd_key);
|
||
if (!pmd) {
|
||
pmd = dp_netdev_get_pmd(dp, NON_PMD_CORE_ID);
|
||
if (!pmd) {
|
||
return EBUSY;
|
||
}
|
||
}
|
||
|
||
if (execute->probe) {
|
||
/* If this is part of a probe, Drop the packet, since executing
|
||
* the action may actually cause spurious packets be sent into
|
||
* the network. */
|
||
return 0;
|
||
}
|
||
|
||
/* If the current thread is non-pmd thread, acquires
|
||
* the 'non_pmd_mutex'. */
|
||
if (pmd->core_id == NON_PMD_CORE_ID) {
|
||
ovs_mutex_lock(&dp->non_pmd_mutex);
|
||
}
|
||
|
||
/* The action processing expects the RSS hash to be valid, because
|
||
* it's always initialized at the beginning of datapath processing.
|
||
* In this case, though, 'execute->packet' may not have gone through
|
||
* the datapath at all, it may have been generated by the upper layer
|
||
* (OpenFlow packet-out, BFD frame, ...). */
|
||
if (!dp_packet_rss_valid(execute->packet)) {
|
||
dp_packet_set_rss_hash(execute->packet,
|
||
flow_hash_5tuple(execute->flow, 0));
|
||
}
|
||
|
||
dp_packet_batch_init_packet(&pp, execute->packet);
|
||
dp_netdev_execute_actions(pmd, &pp, false, execute->flow,
|
||
execute->actions, execute->actions_len,
|
||
time_msec());
|
||
|
||
if (pmd->core_id == NON_PMD_CORE_ID) {
|
||
ovs_mutex_unlock(&dp->non_pmd_mutex);
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
|
||
{
|
||
size_t i;
|
||
|
||
for (i = 0; i < n_ops; i++) {
|
||
struct dpif_op *op = ops[i];
|
||
|
||
switch (op->type) {
|
||
case DPIF_OP_FLOW_PUT:
|
||
op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
|
||
break;
|
||
|
||
case DPIF_OP_FLOW_DEL:
|
||
op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
|
||
break;
|
||
|
||
case DPIF_OP_EXECUTE:
|
||
op->error = dpif_netdev_execute(dpif, &op->u.execute);
|
||
break;
|
||
|
||
case DPIF_OP_FLOW_GET:
|
||
op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Applies datapath configuration from the database. Some of the changes are
|
||
* actually applied in dpif_netdev_run(). */
|
||
static int
|
||
dpif_netdev_set_config(struct dpif *dpif, const struct smap *other_config)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
const char *cmask = smap_get(other_config, "pmd-cpu-mask");
|
||
unsigned long long insert_prob =
|
||
smap_get_ullong(other_config, "emc-insert-inv-prob",
|
||
DEFAULT_EM_FLOW_INSERT_INV_PROB);
|
||
uint32_t insert_min, cur_min;
|
||
|
||
if (!nullable_string_is_equal(dp->pmd_cmask, cmask)) {
|
||
free(dp->pmd_cmask);
|
||
dp->pmd_cmask = nullable_xstrdup(cmask);
|
||
dp_netdev_request_reconfigure(dp);
|
||
}
|
||
|
||
atomic_read_relaxed(&dp->emc_insert_min, &cur_min);
|
||
if (insert_prob <= UINT32_MAX) {
|
||
insert_min = insert_prob == 0 ? 0 : UINT32_MAX / insert_prob;
|
||
} else {
|
||
insert_min = DEFAULT_EM_FLOW_INSERT_MIN;
|
||
insert_prob = DEFAULT_EM_FLOW_INSERT_INV_PROB;
|
||
}
|
||
|
||
if (insert_min != cur_min) {
|
||
atomic_store_relaxed(&dp->emc_insert_min, insert_min);
|
||
if (insert_min == 0) {
|
||
VLOG_INFO("EMC has been disabled");
|
||
} else {
|
||
VLOG_INFO("EMC insertion probability changed to 1/%llu (~%.2f%%)",
|
||
insert_prob, (100 / (float)insert_prob));
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Parses affinity list and returns result in 'core_ids'. */
|
||
static int
|
||
parse_affinity_list(const char *affinity_list, unsigned *core_ids, int n_rxq)
|
||
{
|
||
unsigned i;
|
||
char *list, *copy, *key, *value;
|
||
int error = 0;
|
||
|
||
for (i = 0; i < n_rxq; i++) {
|
||
core_ids[i] = OVS_CORE_UNSPEC;
|
||
}
|
||
|
||
if (!affinity_list) {
|
||
return 0;
|
||
}
|
||
|
||
list = copy = xstrdup(affinity_list);
|
||
|
||
while (ofputil_parse_key_value(&list, &key, &value)) {
|
||
int rxq_id, core_id;
|
||
|
||
if (!str_to_int(key, 0, &rxq_id) || rxq_id < 0
|
||
|| !str_to_int(value, 0, &core_id) || core_id < 0) {
|
||
error = EINVAL;
|
||
break;
|
||
}
|
||
|
||
if (rxq_id < n_rxq) {
|
||
core_ids[rxq_id] = core_id;
|
||
}
|
||
}
|
||
|
||
free(copy);
|
||
return error;
|
||
}
|
||
|
||
/* Parses 'affinity_list' and applies configuration if it is valid. */
|
||
static int
|
||
dpif_netdev_port_set_rxq_affinity(struct dp_netdev_port *port,
|
||
const char *affinity_list)
|
||
{
|
||
unsigned *core_ids, i;
|
||
int error = 0;
|
||
|
||
core_ids = xmalloc(port->n_rxq * sizeof *core_ids);
|
||
if (parse_affinity_list(affinity_list, core_ids, port->n_rxq)) {
|
||
error = EINVAL;
|
||
goto exit;
|
||
}
|
||
|
||
for (i = 0; i < port->n_rxq; i++) {
|
||
port->rxqs[i].core_id = core_ids[i];
|
||
}
|
||
|
||
exit:
|
||
free(core_ids);
|
||
return error;
|
||
}
|
||
|
||
/* Changes the affinity of port's rx queues. The changes are actually applied
|
||
* in dpif_netdev_run(). */
|
||
static int
|
||
dpif_netdev_port_set_config(struct dpif *dpif, odp_port_t port_no,
|
||
const struct smap *cfg)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_port *port;
|
||
int error = 0;
|
||
const char *affinity_list = smap_get(cfg, "pmd-rxq-affinity");
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
error = get_port_by_number(dp, port_no, &port);
|
||
if (error || !netdev_is_pmd(port->netdev)
|
||
|| nullable_string_is_equal(affinity_list, port->rxq_affinity_list)) {
|
||
goto unlock;
|
||
}
|
||
|
||
error = dpif_netdev_port_set_rxq_affinity(port, affinity_list);
|
||
if (error) {
|
||
goto unlock;
|
||
}
|
||
free(port->rxq_affinity_list);
|
||
port->rxq_affinity_list = nullable_xstrdup(affinity_list);
|
||
|
||
dp_netdev_request_reconfigure(dp);
|
||
unlock:
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
return error;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
|
||
uint32_t queue_id, uint32_t *priority)
|
||
{
|
||
*priority = queue_id;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Creates and returns a new 'struct dp_netdev_actions', whose actions are
|
||
* a copy of the 'size' bytes of 'actions' input parameters. */
|
||
struct dp_netdev_actions *
|
||
dp_netdev_actions_create(const struct nlattr *actions, size_t size)
|
||
{
|
||
struct dp_netdev_actions *netdev_actions;
|
||
|
||
netdev_actions = xmalloc(sizeof *netdev_actions + size);
|
||
memcpy(netdev_actions->actions, actions, size);
|
||
netdev_actions->size = size;
|
||
|
||
return netdev_actions;
|
||
}
|
||
|
||
struct dp_netdev_actions *
|
||
dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
|
||
{
|
||
return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_actions_free(struct dp_netdev_actions *actions)
|
||
{
|
||
free(actions);
|
||
}
|
||
|
||
static inline unsigned long long
|
||
cycles_counter(void)
|
||
{
|
||
#ifdef DPDK_NETDEV
|
||
return rte_get_tsc_cycles();
|
||
#else
|
||
return 0;
|
||
#endif
|
||
}
|
||
|
||
/* Fake mutex to make sure that the calls to cycles_count_* are balanced */
|
||
extern struct ovs_mutex cycles_counter_fake_mutex;
|
||
|
||
/* Start counting cycles. Must be followed by 'cycles_count_end()' */
|
||
static inline void
|
||
cycles_count_start(struct dp_netdev_pmd_thread *pmd)
|
||
OVS_ACQUIRES(&cycles_counter_fake_mutex)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
pmd->last_cycles = cycles_counter();
|
||
}
|
||
|
||
/* Stop counting cycles and add them to the counter 'type' */
|
||
static inline void
|
||
cycles_count_end(struct dp_netdev_pmd_thread *pmd,
|
||
enum pmd_cycles_counter_type type)
|
||
OVS_RELEASES(&cycles_counter_fake_mutex)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
unsigned long long interval = cycles_counter() - pmd->last_cycles;
|
||
|
||
non_atomic_ullong_add(&pmd->cycles.n[type], interval);
|
||
}
|
||
|
||
/* Calculate the intermediate cycle result and add to the counter 'type' */
|
||
static inline void
|
||
cycles_count_intermediate(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_rxq *rxq,
|
||
enum pmd_cycles_counter_type type)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
unsigned long long new_cycles = cycles_counter();
|
||
unsigned long long interval = new_cycles - pmd->last_cycles;
|
||
pmd->last_cycles = new_cycles;
|
||
|
||
non_atomic_ullong_add(&pmd->cycles.n[type], interval);
|
||
if (rxq && (type == PMD_CYCLES_PROCESSING)) {
|
||
/* Add to the amount of current processing cycles. */
|
||
non_atomic_ullong_add(&rxq->cycles[RXQ_CYCLES_PROC_CURR], interval);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dp_netdev_rxq_set_cycles(struct dp_netdev_rxq *rx,
|
||
enum rxq_cycles_counter_type type,
|
||
unsigned long long cycles)
|
||
{
|
||
atomic_store_relaxed(&rx->cycles[type], cycles);
|
||
}
|
||
|
||
static uint64_t
|
||
dp_netdev_rxq_get_cycles(struct dp_netdev_rxq *rx,
|
||
enum rxq_cycles_counter_type type)
|
||
{
|
||
unsigned long long processing_cycles;
|
||
atomic_read_relaxed(&rx->cycles[type], &processing_cycles);
|
||
return processing_cycles;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_rxq_set_intrvl_cycles(struct dp_netdev_rxq *rx,
|
||
unsigned long long cycles)
|
||
{
|
||
unsigned int idx = rx->intrvl_idx++ % PMD_RXQ_INTERVAL_MAX;
|
||
atomic_store_relaxed(&rx->cycles_intrvl[idx], cycles);
|
||
}
|
||
|
||
static uint64_t
|
||
dp_netdev_rxq_get_intrvl_cycles(struct dp_netdev_rxq *rx, unsigned idx)
|
||
{
|
||
unsigned long long processing_cycles;
|
||
atomic_read_relaxed(&rx->cycles_intrvl[idx], &processing_cycles);
|
||
return processing_cycles;
|
||
}
|
||
|
||
static int
|
||
dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
|
||
struct netdev_rxq *rx,
|
||
odp_port_t port_no)
|
||
{
|
||
struct dp_packet_batch batch;
|
||
int error;
|
||
int batch_cnt = 0;
|
||
|
||
dp_packet_batch_init(&batch);
|
||
error = netdev_rxq_recv(rx, &batch);
|
||
if (!error) {
|
||
*recirc_depth_get() = 0;
|
||
|
||
batch_cnt = batch.count;
|
||
dp_netdev_input(pmd, &batch, port_no);
|
||
} else if (error != EAGAIN && error != EOPNOTSUPP) {
|
||
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
|
||
|
||
VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
|
||
netdev_rxq_get_name(rx), ovs_strerror(error));
|
||
}
|
||
|
||
return batch_cnt;
|
||
}
|
||
|
||
static struct tx_port *
|
||
tx_port_lookup(const struct hmap *hmap, odp_port_t port_no)
|
||
{
|
||
struct tx_port *tx;
|
||
|
||
HMAP_FOR_EACH_IN_BUCKET (tx, node, hash_port_no(port_no), hmap) {
|
||
if (tx->port->port_no == port_no) {
|
||
return tx;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static int
|
||
port_reconfigure(struct dp_netdev_port *port)
|
||
{
|
||
struct netdev *netdev = port->netdev;
|
||
int i, err;
|
||
|
||
port->need_reconfigure = false;
|
||
|
||
/* Closes the existing 'rxq's. */
|
||
for (i = 0; i < port->n_rxq; i++) {
|
||
netdev_rxq_close(port->rxqs[i].rx);
|
||
port->rxqs[i].rx = NULL;
|
||
}
|
||
unsigned last_nrxq = port->n_rxq;
|
||
port->n_rxq = 0;
|
||
|
||
/* Allows 'netdev' to apply the pending configuration changes. */
|
||
if (netdev_is_reconf_required(netdev)) {
|
||
err = netdev_reconfigure(netdev);
|
||
if (err && (err != EOPNOTSUPP)) {
|
||
VLOG_ERR("Failed to set interface %s new configuration",
|
||
netdev_get_name(netdev));
|
||
return err;
|
||
}
|
||
}
|
||
/* If the netdev_reconfigure() above succeeds, reopens the 'rxq's. */
|
||
port->rxqs = xrealloc(port->rxqs,
|
||
sizeof *port->rxqs * netdev_n_rxq(netdev));
|
||
/* Realloc 'used' counters for tx queues. */
|
||
free(port->txq_used);
|
||
port->txq_used = xcalloc(netdev_n_txq(netdev), sizeof *port->txq_used);
|
||
|
||
for (i = 0; i < netdev_n_rxq(netdev); i++) {
|
||
bool new_queue = i >= last_nrxq;
|
||
if (new_queue) {
|
||
memset(&port->rxqs[i], 0, sizeof port->rxqs[i]);
|
||
}
|
||
|
||
port->rxqs[i].port = port;
|
||
|
||
if (new_queue) {
|
||
dp_netdev_rxq_set_cycles(&port->rxqs[i], RXQ_CYCLES_PROC_CURR, 0);
|
||
dp_netdev_rxq_set_cycles(&port->rxqs[i], RXQ_CYCLES_PROC_HIST, 0);
|
||
for (unsigned j = 0; j < PMD_RXQ_INTERVAL_MAX; j++) {
|
||
dp_netdev_rxq_set_intrvl_cycles(&port->rxqs[i], 0);
|
||
}
|
||
}
|
||
err = netdev_rxq_open(netdev, &port->rxqs[i].rx, i);
|
||
if (err) {
|
||
return err;
|
||
}
|
||
port->n_rxq++;
|
||
}
|
||
|
||
/* Parse affinity list to apply configuration for new queues. */
|
||
dpif_netdev_port_set_rxq_affinity(port, port->rxq_affinity_list);
|
||
|
||
return 0;
|
||
}
|
||
|
||
struct rr_numa_list {
|
||
struct hmap numas; /* Contains 'struct rr_numa' */
|
||
};
|
||
|
||
struct rr_numa {
|
||
struct hmap_node node;
|
||
|
||
int numa_id;
|
||
|
||
/* Non isolated pmds on numa node 'numa_id' */
|
||
struct dp_netdev_pmd_thread **pmds;
|
||
int n_pmds;
|
||
|
||
int cur_index;
|
||
bool idx_inc;
|
||
};
|
||
|
||
static struct rr_numa *
|
||
rr_numa_list_lookup(struct rr_numa_list *rr, int numa_id)
|
||
{
|
||
struct rr_numa *numa;
|
||
|
||
HMAP_FOR_EACH_WITH_HASH (numa, node, hash_int(numa_id, 0), &rr->numas) {
|
||
if (numa->numa_id == numa_id) {
|
||
return numa;
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Returns the next node in numa list following 'numa' in round-robin fashion.
|
||
* Returns first node if 'numa' is a null pointer or the last node in 'rr'.
|
||
* Returns NULL if 'rr' numa list is empty. */
|
||
static struct rr_numa *
|
||
rr_numa_list_next(struct rr_numa_list *rr, const struct rr_numa *numa)
|
||
{
|
||
struct hmap_node *node = NULL;
|
||
|
||
if (numa) {
|
||
node = hmap_next(&rr->numas, &numa->node);
|
||
}
|
||
if (!node) {
|
||
node = hmap_first(&rr->numas);
|
||
}
|
||
|
||
return (node) ? CONTAINER_OF(node, struct rr_numa, node) : NULL;
|
||
}
|
||
|
||
static void
|
||
rr_numa_list_populate(struct dp_netdev *dp, struct rr_numa_list *rr)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct rr_numa *numa;
|
||
|
||
hmap_init(&rr->numas);
|
||
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (pmd->core_id == NON_PMD_CORE_ID || pmd->isolated) {
|
||
continue;
|
||
}
|
||
|
||
numa = rr_numa_list_lookup(rr, pmd->numa_id);
|
||
if (!numa) {
|
||
numa = xzalloc(sizeof *numa);
|
||
numa->numa_id = pmd->numa_id;
|
||
hmap_insert(&rr->numas, &numa->node, hash_int(pmd->numa_id, 0));
|
||
}
|
||
numa->n_pmds++;
|
||
numa->pmds = xrealloc(numa->pmds, numa->n_pmds * sizeof *numa->pmds);
|
||
numa->pmds[numa->n_pmds - 1] = pmd;
|
||
/* At least one pmd so initialise curr_idx and idx_inc. */
|
||
numa->cur_index = 0;
|
||
numa->idx_inc = true;
|
||
}
|
||
}
|
||
|
||
/* Returns the next pmd from the numa node in
|
||
* incrementing or decrementing order. */
|
||
static struct dp_netdev_pmd_thread *
|
||
rr_numa_get_pmd(struct rr_numa *numa)
|
||
{
|
||
int numa_idx = numa->cur_index;
|
||
|
||
if (numa->idx_inc == true) {
|
||
/* Incrementing through list of pmds. */
|
||
if (numa->cur_index == numa->n_pmds-1) {
|
||
/* Reached the last pmd. */
|
||
numa->idx_inc = false;
|
||
} else {
|
||
numa->cur_index++;
|
||
}
|
||
} else {
|
||
/* Decrementing through list of pmds. */
|
||
if (numa->cur_index == 0) {
|
||
/* Reached the first pmd. */
|
||
numa->idx_inc = true;
|
||
} else {
|
||
numa->cur_index--;
|
||
}
|
||
}
|
||
return numa->pmds[numa_idx];
|
||
}
|
||
|
||
static void
|
||
rr_numa_list_destroy(struct rr_numa_list *rr)
|
||
{
|
||
struct rr_numa *numa;
|
||
|
||
HMAP_FOR_EACH_POP (numa, node, &rr->numas) {
|
||
free(numa->pmds);
|
||
free(numa);
|
||
}
|
||
hmap_destroy(&rr->numas);
|
||
}
|
||
|
||
/* Sort Rx Queues by the processing cycles they are consuming. */
|
||
static int
|
||
rxq_cycle_sort(const void *a, const void *b)
|
||
{
|
||
struct dp_netdev_rxq *qa;
|
||
struct dp_netdev_rxq *qb;
|
||
uint64_t total_qa, total_qb;
|
||
unsigned i;
|
||
|
||
qa = *(struct dp_netdev_rxq **) a;
|
||
qb = *(struct dp_netdev_rxq **) b;
|
||
|
||
total_qa = total_qb = 0;
|
||
for (i = 0; i < PMD_RXQ_INTERVAL_MAX; i++) {
|
||
total_qa += dp_netdev_rxq_get_intrvl_cycles(qa, i);
|
||
total_qb += dp_netdev_rxq_get_intrvl_cycles(qb, i);
|
||
}
|
||
dp_netdev_rxq_set_cycles(qa, RXQ_CYCLES_PROC_HIST, total_qa);
|
||
dp_netdev_rxq_set_cycles(qb, RXQ_CYCLES_PROC_HIST, total_qb);
|
||
|
||
if (total_qa >= total_qb) {
|
||
return -1;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/* Assign pmds to queues. If 'pinned' is true, assign pmds to pinned
|
||
* queues and marks the pmds as isolated. Otherwise, assign non isolated
|
||
* pmds to unpinned queues.
|
||
*
|
||
* If 'pinned' is false queues will be sorted by processing cycles they are
|
||
* consuming and then assigned to pmds in round robin order.
|
||
*
|
||
* The function doesn't touch the pmd threads, it just stores the assignment
|
||
* in the 'pmd' member of each rxq. */
|
||
static void
|
||
rxq_scheduling(struct dp_netdev *dp, bool pinned) OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
struct rr_numa_list rr;
|
||
struct rr_numa *non_local_numa = NULL;
|
||
struct dp_netdev_rxq ** rxqs = NULL;
|
||
int i, n_rxqs = 0;
|
||
struct rr_numa *numa = NULL;
|
||
int numa_id;
|
||
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (!netdev_is_pmd(port->netdev)) {
|
||
continue;
|
||
}
|
||
|
||
for (int qid = 0; qid < port->n_rxq; qid++) {
|
||
struct dp_netdev_rxq *q = &port->rxqs[qid];
|
||
|
||
if (pinned && q->core_id != OVS_CORE_UNSPEC) {
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
|
||
pmd = dp_netdev_get_pmd(dp, q->core_id);
|
||
if (!pmd) {
|
||
VLOG_WARN("There is no PMD thread on core %d. Queue "
|
||
"%d on port \'%s\' will not be polled.",
|
||
q->core_id, qid, netdev_get_name(port->netdev));
|
||
} else {
|
||
q->pmd = pmd;
|
||
pmd->isolated = true;
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
} else if (!pinned && q->core_id == OVS_CORE_UNSPEC) {
|
||
if (n_rxqs == 0) {
|
||
rxqs = xmalloc(sizeof *rxqs);
|
||
} else {
|
||
rxqs = xrealloc(rxqs, sizeof *rxqs * (n_rxqs + 1));
|
||
}
|
||
/* Store the queue. */
|
||
rxqs[n_rxqs++] = q;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (n_rxqs > 1) {
|
||
/* Sort the queues in order of the processing cycles
|
||
* they consumed during their last pmd interval. */
|
||
qsort(rxqs, n_rxqs, sizeof *rxqs, rxq_cycle_sort);
|
||
}
|
||
|
||
rr_numa_list_populate(dp, &rr);
|
||
/* Assign the sorted queues to pmds in round robin. */
|
||
for (i = 0; i < n_rxqs; i++) {
|
||
numa_id = netdev_get_numa_id(rxqs[i]->port->netdev);
|
||
numa = rr_numa_list_lookup(&rr, numa_id);
|
||
if (!numa) {
|
||
/* There are no pmds on the queue's local NUMA node.
|
||
Round robin on the NUMA nodes that do have pmds. */
|
||
non_local_numa = rr_numa_list_next(&rr, non_local_numa);
|
||
if (!non_local_numa) {
|
||
VLOG_ERR("There is no available (non-isolated) pmd "
|
||
"thread for port \'%s\' queue %d. This queue "
|
||
"will not be polled. Is pmd-cpu-mask set to "
|
||
"zero? Or are all PMDs isolated to other "
|
||
"queues?", netdev_rxq_get_name(rxqs[i]->rx),
|
||
netdev_rxq_get_queue_id(rxqs[i]->rx));
|
||
continue;
|
||
}
|
||
rxqs[i]->pmd = rr_numa_get_pmd(non_local_numa);
|
||
VLOG_WARN("There's no available (non-isolated) pmd thread "
|
||
"on numa node %d. Queue %d on port \'%s\' will "
|
||
"be assigned to the pmd on core %d "
|
||
"(numa node %d). Expect reduced performance.",
|
||
numa_id, netdev_rxq_get_queue_id(rxqs[i]->rx),
|
||
netdev_rxq_get_name(rxqs[i]->rx),
|
||
rxqs[i]->pmd->core_id, rxqs[i]->pmd->numa_id);
|
||
} else {
|
||
rxqs[i]->pmd = rr_numa_get_pmd(numa);
|
||
VLOG_INFO("Core %d on numa node %d assigned port \'%s\' "
|
||
"rx queue %d (measured processing cycles %"PRIu64").",
|
||
rxqs[i]->pmd->core_id, numa_id,
|
||
netdev_rxq_get_name(rxqs[i]->rx),
|
||
netdev_rxq_get_queue_id(rxqs[i]->rx),
|
||
dp_netdev_rxq_get_cycles(rxqs[i], RXQ_CYCLES_PROC_HIST));
|
||
}
|
||
}
|
||
|
||
rr_numa_list_destroy(&rr);
|
||
free(rxqs);
|
||
}
|
||
|
||
static void
|
||
reload_affected_pmds(struct dp_netdev *dp)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (pmd->need_reload) {
|
||
dp_netdev_reload_pmd__(pmd);
|
||
pmd->need_reload = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
reconfigure_pmd_threads(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct ovs_numa_dump *pmd_cores;
|
||
struct ovs_numa_info_core *core;
|
||
struct hmapx to_delete = HMAPX_INITIALIZER(&to_delete);
|
||
struct hmapx_node *node;
|
||
bool changed = false;
|
||
bool need_to_adjust_static_tx_qids = false;
|
||
|
||
/* The pmd threads should be started only if there's a pmd port in the
|
||
* datapath. If the user didn't provide any "pmd-cpu-mask", we start
|
||
* NR_PMD_THREADS per numa node. */
|
||
if (!has_pmd_port(dp)) {
|
||
pmd_cores = ovs_numa_dump_n_cores_per_numa(0);
|
||
} else if (dp->pmd_cmask && dp->pmd_cmask[0]) {
|
||
pmd_cores = ovs_numa_dump_cores_with_cmask(dp->pmd_cmask);
|
||
} else {
|
||
pmd_cores = ovs_numa_dump_n_cores_per_numa(NR_PMD_THREADS);
|
||
}
|
||
|
||
/* We need to adjust 'static_tx_qid's only if we're reducing number of
|
||
* PMD threads. Otherwise, new threads will allocate all the freed ids. */
|
||
if (ovs_numa_dump_count(pmd_cores) < cmap_count(&dp->poll_threads) - 1) {
|
||
/* Adjustment is required to keep 'static_tx_qid's sequential and
|
||
* avoid possible issues, for example, imbalanced tx queue usage
|
||
* and unnecessary locking caused by remapping on netdev level. */
|
||
need_to_adjust_static_tx_qids = true;
|
||
}
|
||
|
||
/* Check for unwanted pmd threads */
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (pmd->core_id == NON_PMD_CORE_ID) {
|
||
continue;
|
||
}
|
||
if (!ovs_numa_dump_contains_core(pmd_cores, pmd->numa_id,
|
||
pmd->core_id)) {
|
||
hmapx_add(&to_delete, pmd);
|
||
} else if (need_to_adjust_static_tx_qids) {
|
||
pmd->need_reload = true;
|
||
}
|
||
}
|
||
|
||
HMAPX_FOR_EACH (node, &to_delete) {
|
||
pmd = (struct dp_netdev_pmd_thread *) node->data;
|
||
VLOG_INFO("PMD thread on numa_id: %d, core id: %2d destroyed.",
|
||
pmd->numa_id, pmd->core_id);
|
||
dp_netdev_del_pmd(dp, pmd);
|
||
}
|
||
changed = !hmapx_is_empty(&to_delete);
|
||
hmapx_destroy(&to_delete);
|
||
|
||
if (need_to_adjust_static_tx_qids) {
|
||
/* 'static_tx_qid's are not sequential now.
|
||
* Reload remaining threads to fix this. */
|
||
reload_affected_pmds(dp);
|
||
}
|
||
|
||
/* Check for required new pmd threads */
|
||
FOR_EACH_CORE_ON_DUMP(core, pmd_cores) {
|
||
pmd = dp_netdev_get_pmd(dp, core->core_id);
|
||
if (!pmd) {
|
||
pmd = xzalloc(sizeof *pmd);
|
||
dp_netdev_configure_pmd(pmd, dp, core->core_id, core->numa_id);
|
||
pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
|
||
VLOG_INFO("PMD thread on numa_id: %d, core id: %2d created.",
|
||
pmd->numa_id, pmd->core_id);
|
||
changed = true;
|
||
} else {
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
}
|
||
|
||
if (changed) {
|
||
struct ovs_numa_info_numa *numa;
|
||
|
||
/* Log the number of pmd threads per numa node. */
|
||
FOR_EACH_NUMA_ON_DUMP (numa, pmd_cores) {
|
||
VLOG_INFO("There are %"PRIuSIZE" pmd threads on numa node %d",
|
||
numa->n_cores, numa->numa_id);
|
||
}
|
||
}
|
||
|
||
ovs_numa_dump_destroy(pmd_cores);
|
||
}
|
||
|
||
static void
|
||
pmd_remove_stale_ports(struct dp_netdev *dp,
|
||
struct dp_netdev_pmd_thread *pmd)
|
||
OVS_EXCLUDED(pmd->port_mutex)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct rxq_poll *poll, *poll_next;
|
||
struct tx_port *tx, *tx_next;
|
||
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
HMAP_FOR_EACH_SAFE (poll, poll_next, node, &pmd->poll_list) {
|
||
struct dp_netdev_port *port = poll->rxq->port;
|
||
|
||
if (port->need_reconfigure
|
||
|| !hmap_contains(&dp->ports, &port->node)) {
|
||
dp_netdev_del_rxq_from_pmd(pmd, poll);
|
||
}
|
||
}
|
||
HMAP_FOR_EACH_SAFE (tx, tx_next, node, &pmd->tx_ports) {
|
||
struct dp_netdev_port *port = tx->port;
|
||
|
||
if (port->need_reconfigure
|
||
|| !hmap_contains(&dp->ports, &port->node)) {
|
||
dp_netdev_del_port_tx_from_pmd(pmd, tx);
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
}
|
||
|
||
/* Must be called each time a port is added/removed or the cmask changes.
|
||
* This creates and destroys pmd threads, reconfigures ports, opens their
|
||
* rxqs and assigns all rxqs/txqs to pmd threads. */
|
||
static void
|
||
reconfigure_datapath(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct dp_netdev_port *port;
|
||
int wanted_txqs;
|
||
|
||
dp->last_reconfigure_seq = seq_read(dp->reconfigure_seq);
|
||
|
||
/* Step 1: Adjust the pmd threads based on the datapath ports, the cores
|
||
* on the system and the user configuration. */
|
||
reconfigure_pmd_threads(dp);
|
||
|
||
wanted_txqs = cmap_count(&dp->poll_threads);
|
||
|
||
/* The number of pmd threads might have changed, or a port can be new:
|
||
* adjust the txqs. */
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
netdev_set_tx_multiq(port->netdev, wanted_txqs);
|
||
}
|
||
|
||
/* Step 2: Remove from the pmd threads ports that have been removed or
|
||
* need reconfiguration. */
|
||
|
||
/* Check for all the ports that need reconfiguration. We cache this in
|
||
* 'port->need_reconfigure', because netdev_is_reconf_required() can
|
||
* change at any time. */
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (netdev_is_reconf_required(port->netdev)) {
|
||
port->need_reconfigure = true;
|
||
}
|
||
}
|
||
|
||
/* Remove from the pmd threads all the ports that have been deleted or
|
||
* need reconfiguration. */
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
pmd_remove_stale_ports(dp, pmd);
|
||
}
|
||
|
||
/* Reload affected pmd threads. We must wait for the pmd threads before
|
||
* reconfiguring the ports, because a port cannot be reconfigured while
|
||
* it's being used. */
|
||
reload_affected_pmds(dp);
|
||
|
||
/* Step 3: Reconfigure ports. */
|
||
|
||
/* We only reconfigure the ports that we determined above, because they're
|
||
* not being used by any pmd thread at the moment. If a port fails to
|
||
* reconfigure we remove it from the datapath. */
|
||
struct dp_netdev_port *next_port;
|
||
HMAP_FOR_EACH_SAFE (port, next_port, node, &dp->ports) {
|
||
int err;
|
||
|
||
if (!port->need_reconfigure) {
|
||
continue;
|
||
}
|
||
|
||
err = port_reconfigure(port);
|
||
if (err) {
|
||
hmap_remove(&dp->ports, &port->node);
|
||
seq_change(dp->port_seq);
|
||
port_destroy(port);
|
||
} else {
|
||
port->dynamic_txqs = netdev_n_txq(port->netdev) < wanted_txqs;
|
||
}
|
||
}
|
||
|
||
/* Step 4: Compute new rxq scheduling. We don't touch the pmd threads
|
||
* for now, we just update the 'pmd' pointer in each rxq to point to the
|
||
* wanted thread according to the scheduling policy. */
|
||
|
||
/* Reset all the pmd threads to non isolated. */
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
pmd->isolated = false;
|
||
}
|
||
|
||
/* Reset all the queues to unassigned */
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
for (int i = 0; i < port->n_rxq; i++) {
|
||
port->rxqs[i].pmd = NULL;
|
||
}
|
||
}
|
||
|
||
/* Add pinned queues and mark pmd threads isolated. */
|
||
rxq_scheduling(dp, true);
|
||
|
||
/* Add non-pinned queues. */
|
||
rxq_scheduling(dp, false);
|
||
|
||
/* Step 5: Remove queues not compliant with new scheduling. */
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
struct rxq_poll *poll, *poll_next;
|
||
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
HMAP_FOR_EACH_SAFE (poll, poll_next, node, &pmd->poll_list) {
|
||
if (poll->rxq->pmd != pmd) {
|
||
dp_netdev_del_rxq_from_pmd(pmd, poll);
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
}
|
||
|
||
/* Reload affected pmd threads. We must wait for the pmd threads to remove
|
||
* the old queues before readding them, otherwise a queue can be polled by
|
||
* two threads at the same time. */
|
||
reload_affected_pmds(dp);
|
||
|
||
/* Step 6: Add queues from scheduling, if they're not there already. */
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (!netdev_is_pmd(port->netdev)) {
|
||
continue;
|
||
}
|
||
|
||
for (int qid = 0; qid < port->n_rxq; qid++) {
|
||
struct dp_netdev_rxq *q = &port->rxqs[qid];
|
||
|
||
if (q->pmd) {
|
||
ovs_mutex_lock(&q->pmd->port_mutex);
|
||
dp_netdev_add_rxq_to_pmd(q->pmd, q);
|
||
ovs_mutex_unlock(&q->pmd->port_mutex);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Add every port to the tx cache of every pmd thread, if it's not
|
||
* there already and if this pmd has at least one rxq to poll. */
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
if (hmap_count(&pmd->poll_list) || pmd->core_id == NON_PMD_CORE_ID) {
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
dp_netdev_add_port_tx_to_pmd(pmd, port);
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
}
|
||
|
||
/* Reload affected pmd threads. */
|
||
reload_affected_pmds(dp);
|
||
}
|
||
|
||
/* Returns true if one of the netdevs in 'dp' requires a reconfiguration */
|
||
static bool
|
||
ports_require_restart(const struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (netdev_is_reconf_required(port->netdev)) {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* Return true if needs to revalidate datapath flows. */
|
||
static bool
|
||
dpif_netdev_run(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_pmd_thread *non_pmd;
|
||
uint64_t new_tnl_seq;
|
||
int process_packets = 0;
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
non_pmd = dp_netdev_get_pmd(dp, NON_PMD_CORE_ID);
|
||
if (non_pmd) {
|
||
ovs_mutex_lock(&dp->non_pmd_mutex);
|
||
cycles_count_start(non_pmd);
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
if (!netdev_is_pmd(port->netdev)) {
|
||
int i;
|
||
|
||
for (i = 0; i < port->n_rxq; i++) {
|
||
process_packets =
|
||
dp_netdev_process_rxq_port(non_pmd,
|
||
port->rxqs[i].rx,
|
||
port->port_no);
|
||
cycles_count_intermediate(non_pmd, NULL,
|
||
process_packets
|
||
? PMD_CYCLES_PROCESSING
|
||
: PMD_CYCLES_IDLE);
|
||
}
|
||
}
|
||
}
|
||
cycles_count_end(non_pmd, PMD_CYCLES_IDLE);
|
||
dpif_netdev_xps_revalidate_pmd(non_pmd, time_msec(), false);
|
||
ovs_mutex_unlock(&dp->non_pmd_mutex);
|
||
|
||
dp_netdev_pmd_unref(non_pmd);
|
||
}
|
||
|
||
if (dp_netdev_is_reconf_required(dp) || ports_require_restart(dp)) {
|
||
reconfigure_datapath(dp);
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
|
||
tnl_neigh_cache_run();
|
||
tnl_port_map_run();
|
||
new_tnl_seq = seq_read(tnl_conf_seq);
|
||
|
||
if (dp->last_tnl_conf_seq != new_tnl_seq) {
|
||
dp->last_tnl_conf_seq = new_tnl_seq;
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_wait(struct dpif *dpif)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
HMAP_FOR_EACH (port, node, &dp->ports) {
|
||
netdev_wait_reconf_required(port->netdev);
|
||
if (!netdev_is_pmd(port->netdev)) {
|
||
int i;
|
||
|
||
for (i = 0; i < port->n_rxq; i++) {
|
||
netdev_rxq_wait(port->rxqs[i].rx);
|
||
}
|
||
}
|
||
}
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
|
||
}
|
||
|
||
static void
|
||
pmd_free_cached_ports(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
struct tx_port *tx_port_cached;
|
||
|
||
/* Free all used tx queue ids. */
|
||
dpif_netdev_xps_revalidate_pmd(pmd, 0, true);
|
||
|
||
HMAP_FOR_EACH_POP (tx_port_cached, node, &pmd->tnl_port_cache) {
|
||
free(tx_port_cached);
|
||
}
|
||
HMAP_FOR_EACH_POP (tx_port_cached, node, &pmd->send_port_cache) {
|
||
free(tx_port_cached);
|
||
}
|
||
}
|
||
|
||
/* Copies ports from 'pmd->tx_ports' (shared with the main thread) to
|
||
* thread-local copies. Copy to 'pmd->tnl_port_cache' if it is a tunnel
|
||
* device, otherwise to 'pmd->send_port_cache' if the port has at least
|
||
* one txq. */
|
||
static void
|
||
pmd_load_cached_ports(struct dp_netdev_pmd_thread *pmd)
|
||
OVS_REQUIRES(pmd->port_mutex)
|
||
{
|
||
struct tx_port *tx_port, *tx_port_cached;
|
||
|
||
pmd_free_cached_ports(pmd);
|
||
hmap_shrink(&pmd->send_port_cache);
|
||
hmap_shrink(&pmd->tnl_port_cache);
|
||
|
||
HMAP_FOR_EACH (tx_port, node, &pmd->tx_ports) {
|
||
if (netdev_has_tunnel_push_pop(tx_port->port->netdev)) {
|
||
tx_port_cached = xmemdup(tx_port, sizeof *tx_port_cached);
|
||
hmap_insert(&pmd->tnl_port_cache, &tx_port_cached->node,
|
||
hash_port_no(tx_port_cached->port->port_no));
|
||
}
|
||
|
||
if (netdev_n_txq(tx_port->port->netdev)) {
|
||
tx_port_cached = xmemdup(tx_port, sizeof *tx_port_cached);
|
||
hmap_insert(&pmd->send_port_cache, &tx_port_cached->node,
|
||
hash_port_no(tx_port_cached->port->port_no));
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
pmd_alloc_static_tx_qid(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
ovs_mutex_lock(&pmd->dp->tx_qid_pool_mutex);
|
||
if (!id_pool_alloc_id(pmd->dp->tx_qid_pool, &pmd->static_tx_qid)) {
|
||
VLOG_ABORT("static_tx_qid allocation failed for PMD on core %2d"
|
||
", numa_id %d.", pmd->core_id, pmd->numa_id);
|
||
}
|
||
ovs_mutex_unlock(&pmd->dp->tx_qid_pool_mutex);
|
||
|
||
VLOG_DBG("static_tx_qid = %d allocated for PMD thread on core %2d"
|
||
", numa_id %d.", pmd->static_tx_qid, pmd->core_id, pmd->numa_id);
|
||
}
|
||
|
||
static void
|
||
pmd_free_static_tx_qid(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
ovs_mutex_lock(&pmd->dp->tx_qid_pool_mutex);
|
||
id_pool_free_id(pmd->dp->tx_qid_pool, pmd->static_tx_qid);
|
||
ovs_mutex_unlock(&pmd->dp->tx_qid_pool_mutex);
|
||
}
|
||
|
||
static int
|
||
pmd_load_queues_and_ports(struct dp_netdev_pmd_thread *pmd,
|
||
struct polled_queue **ppoll_list)
|
||
{
|
||
struct polled_queue *poll_list = *ppoll_list;
|
||
struct rxq_poll *poll;
|
||
int i;
|
||
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
poll_list = xrealloc(poll_list, hmap_count(&pmd->poll_list)
|
||
* sizeof *poll_list);
|
||
|
||
i = 0;
|
||
HMAP_FOR_EACH (poll, node, &pmd->poll_list) {
|
||
poll_list[i].rxq = poll->rxq;
|
||
poll_list[i].port_no = poll->rxq->port->port_no;
|
||
i++;
|
||
}
|
||
|
||
pmd_load_cached_ports(pmd);
|
||
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
|
||
*ppoll_list = poll_list;
|
||
return i;
|
||
}
|
||
|
||
static void *
|
||
pmd_thread_main(void *f_)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd = f_;
|
||
unsigned int lc = 0;
|
||
struct polled_queue *poll_list;
|
||
bool exiting;
|
||
int poll_cnt;
|
||
int i;
|
||
int process_packets = 0;
|
||
|
||
poll_list = NULL;
|
||
|
||
/* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
|
||
ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
|
||
ovs_numa_thread_setaffinity_core(pmd->core_id);
|
||
dpdk_set_lcore_id(pmd->core_id);
|
||
poll_cnt = pmd_load_queues_and_ports(pmd, &poll_list);
|
||
emc_cache_init(&pmd->flow_cache);
|
||
reload:
|
||
pmd_alloc_static_tx_qid(pmd);
|
||
|
||
/* List port/core affinity */
|
||
for (i = 0; i < poll_cnt; i++) {
|
||
VLOG_DBG("Core %d processing port \'%s\' with queue-id %d\n",
|
||
pmd->core_id, netdev_rxq_get_name(poll_list[i].rxq->rx),
|
||
netdev_rxq_get_queue_id(poll_list[i].rxq->rx));
|
||
}
|
||
|
||
if (!poll_cnt) {
|
||
while (seq_read(pmd->reload_seq) == pmd->last_reload_seq) {
|
||
seq_wait(pmd->reload_seq, pmd->last_reload_seq);
|
||
poll_block();
|
||
}
|
||
lc = UINT_MAX;
|
||
}
|
||
|
||
cycles_count_start(pmd);
|
||
for (;;) {
|
||
for (i = 0; i < poll_cnt; i++) {
|
||
process_packets =
|
||
dp_netdev_process_rxq_port(pmd, poll_list[i].rxq->rx,
|
||
poll_list[i].port_no);
|
||
cycles_count_intermediate(pmd, poll_list[i].rxq,
|
||
process_packets ? PMD_CYCLES_PROCESSING
|
||
: PMD_CYCLES_IDLE);
|
||
}
|
||
|
||
if (lc++ > 1024) {
|
||
bool reload;
|
||
|
||
lc = 0;
|
||
|
||
coverage_try_clear();
|
||
dp_netdev_pmd_try_optimize(pmd, poll_list, poll_cnt);
|
||
if (!ovsrcu_try_quiesce()) {
|
||
emc_cache_slow_sweep(&pmd->flow_cache);
|
||
}
|
||
|
||
atomic_read_relaxed(&pmd->reload, &reload);
|
||
if (reload) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
cycles_count_end(pmd, PMD_CYCLES_IDLE);
|
||
|
||
poll_cnt = pmd_load_queues_and_ports(pmd, &poll_list);
|
||
exiting = latch_is_set(&pmd->exit_latch);
|
||
/* Signal here to make sure the pmd finishes
|
||
* reloading the updated configuration. */
|
||
dp_netdev_pmd_reload_done(pmd);
|
||
|
||
pmd_free_static_tx_qid(pmd);
|
||
|
||
if (!exiting) {
|
||
goto reload;
|
||
}
|
||
|
||
emc_cache_uninit(&pmd->flow_cache);
|
||
free(poll_list);
|
||
pmd_free_cached_ports(pmd);
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
dp_netdev_disable_upcall(struct dp_netdev *dp)
|
||
OVS_ACQUIRES(dp->upcall_rwlock)
|
||
{
|
||
fat_rwlock_wrlock(&dp->upcall_rwlock);
|
||
}
|
||
|
||
|
||
/* Meters */
|
||
static void
|
||
dpif_netdev_meter_get_features(const struct dpif * dpif OVS_UNUSED,
|
||
struct ofputil_meter_features *features)
|
||
{
|
||
features->max_meters = MAX_METERS;
|
||
features->band_types = DP_SUPPORTED_METER_BAND_TYPES;
|
||
features->capabilities = DP_SUPPORTED_METER_FLAGS_MASK;
|
||
features->max_bands = MAX_BANDS;
|
||
features->max_color = 0;
|
||
}
|
||
|
||
/* Returns false when packet needs to be dropped. */
|
||
static void
|
||
dp_netdev_run_meter(struct dp_netdev *dp, struct dp_packet_batch *packets_,
|
||
uint32_t meter_id, long long int now)
|
||
{
|
||
struct dp_meter *meter;
|
||
struct dp_meter_band *band;
|
||
struct dp_packet *packet;
|
||
long long int long_delta_t; /* msec */
|
||
uint32_t delta_t; /* msec */
|
||
int i;
|
||
const size_t cnt = dp_packet_batch_size(packets_);
|
||
uint32_t bytes, volume;
|
||
int exceeded_band[NETDEV_MAX_BURST];
|
||
uint32_t exceeded_rate[NETDEV_MAX_BURST];
|
||
int exceeded_pkt = cnt; /* First packet that exceeded a band rate. */
|
||
|
||
if (meter_id >= MAX_METERS) {
|
||
return;
|
||
}
|
||
|
||
meter_lock(dp, meter_id);
|
||
meter = dp->meters[meter_id];
|
||
if (!meter) {
|
||
goto out;
|
||
}
|
||
|
||
/* Initialize as negative values. */
|
||
memset(exceeded_band, 0xff, cnt * sizeof *exceeded_band);
|
||
/* Initialize as zeroes. */
|
||
memset(exceeded_rate, 0, cnt * sizeof *exceeded_rate);
|
||
|
||
/* All packets will hit the meter at the same time. */
|
||
long_delta_t = (now - meter->used); /* msec */
|
||
|
||
/* Make sure delta_t will not be too large, so that bucket will not
|
||
* wrap around below. */
|
||
delta_t = (long_delta_t > (long long int)meter->max_delta_t)
|
||
? meter->max_delta_t : (uint32_t)long_delta_t;
|
||
|
||
/* Update meter stats. */
|
||
meter->used = now;
|
||
meter->packet_count += cnt;
|
||
bytes = 0;
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
bytes += dp_packet_size(packet);
|
||
}
|
||
meter->byte_count += bytes;
|
||
|
||
/* Meters can operate in terms of packets per second or kilobits per
|
||
* second. */
|
||
if (meter->flags & OFPMF13_PKTPS) {
|
||
/* Rate in packets/second, bucket 1/1000 packets. */
|
||
/* msec * packets/sec = 1/1000 packets. */
|
||
volume = cnt * 1000; /* Take 'cnt' packets from the bucket. */
|
||
} else {
|
||
/* Rate in kbps, bucket in bits. */
|
||
/* msec * kbps = bits */
|
||
volume = bytes * 8;
|
||
}
|
||
|
||
/* Update all bands and find the one hit with the highest rate for each
|
||
* packet (if any). */
|
||
for (int m = 0; m < meter->n_bands; ++m) {
|
||
band = &meter->bands[m];
|
||
|
||
/* Update band's bucket. */
|
||
band->bucket += delta_t * band->up.rate;
|
||
if (band->bucket > band->up.burst_size) {
|
||
band->bucket = band->up.burst_size;
|
||
}
|
||
|
||
/* Drain the bucket for all the packets, if possible. */
|
||
if (band->bucket >= volume) {
|
||
band->bucket -= volume;
|
||
} else {
|
||
int band_exceeded_pkt;
|
||
|
||
/* Band limit hit, must process packet-by-packet. */
|
||
if (meter->flags & OFPMF13_PKTPS) {
|
||
band_exceeded_pkt = band->bucket / 1000;
|
||
band->bucket %= 1000; /* Remainder stays in bucket. */
|
||
|
||
/* Update the exceeding band for each exceeding packet.
|
||
* (Only one band will be fired by a packet, and that
|
||
* can be different for each packet.) */
|
||
for (i = band_exceeded_pkt; i < cnt; i++) {
|
||
if (band->up.rate > exceeded_rate[i]) {
|
||
exceeded_rate[i] = band->up.rate;
|
||
exceeded_band[i] = m;
|
||
}
|
||
}
|
||
} else {
|
||
/* Packet sizes differ, must process one-by-one. */
|
||
band_exceeded_pkt = cnt;
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
uint32_t bits = dp_packet_size(packet) * 8;
|
||
|
||
if (band->bucket >= bits) {
|
||
band->bucket -= bits;
|
||
} else {
|
||
if (i < band_exceeded_pkt) {
|
||
band_exceeded_pkt = i;
|
||
}
|
||
/* Update the exceeding band for the exceeding packet.
|
||
* (Only one band will be fired by a packet, and that
|
||
* can be different for each packet.) */
|
||
if (band->up.rate > exceeded_rate[i]) {
|
||
exceeded_rate[i] = band->up.rate;
|
||
exceeded_band[i] = m;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
/* Remember the first exceeding packet. */
|
||
if (exceeded_pkt > band_exceeded_pkt) {
|
||
exceeded_pkt = band_exceeded_pkt;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Fire the highest rate band exceeded by each packet.
|
||
* Drop packets if needed, by swapping packet to the end that will be
|
||
* ignored. */
|
||
size_t j;
|
||
DP_PACKET_BATCH_REFILL_FOR_EACH (j, cnt, packet, packets_) {
|
||
if (exceeded_band[j] >= 0) {
|
||
/* Meter drop packet. */
|
||
band = &meter->bands[exceeded_band[j]];
|
||
band->packet_count += 1;
|
||
band->byte_count += dp_packet_size(packet);
|
||
|
||
dp_packet_delete(packet);
|
||
} else {
|
||
/* Meter accepts packet. */
|
||
dp_packet_batch_refill(packets_, packet, j);
|
||
}
|
||
}
|
||
out:
|
||
meter_unlock(dp, meter_id);
|
||
}
|
||
|
||
/* Meter set/get/del processing is still single-threaded. */
|
||
static int
|
||
dpif_netdev_meter_set(struct dpif *dpif, ofproto_meter_id *meter_id,
|
||
struct ofputil_meter_config *config)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
uint32_t mid = meter_id->uint32;
|
||
struct dp_meter *meter;
|
||
int i;
|
||
|
||
if (mid >= MAX_METERS) {
|
||
return EFBIG; /* Meter_id out of range. */
|
||
}
|
||
|
||
if (config->flags & ~DP_SUPPORTED_METER_FLAGS_MASK ||
|
||
!(config->flags & (OFPMF13_KBPS | OFPMF13_PKTPS))) {
|
||
return EBADF; /* Unsupported flags set */
|
||
}
|
||
|
||
/* Validate bands */
|
||
if (config->n_bands == 0 || config->n_bands > MAX_BANDS) {
|
||
return EINVAL; /* Too many bands */
|
||
}
|
||
|
||
/* Validate rates */
|
||
for (i = 0; i < config->n_bands; i++) {
|
||
if (config->bands[i].rate == 0) {
|
||
return EDOM; /* rate must be non-zero */
|
||
}
|
||
}
|
||
|
||
for (i = 0; i < config->n_bands; ++i) {
|
||
switch (config->bands[i].type) {
|
||
case OFPMBT13_DROP:
|
||
break;
|
||
default:
|
||
return ENODEV; /* Unsupported band type */
|
||
}
|
||
}
|
||
|
||
/* Allocate meter */
|
||
meter = xzalloc(sizeof *meter
|
||
+ config->n_bands * sizeof(struct dp_meter_band));
|
||
if (meter) {
|
||
meter->flags = config->flags;
|
||
meter->n_bands = config->n_bands;
|
||
meter->max_delta_t = 0;
|
||
meter->used = time_msec();
|
||
|
||
/* set up bands */
|
||
for (i = 0; i < config->n_bands; ++i) {
|
||
uint32_t band_max_delta_t;
|
||
|
||
/* Set burst size to a workable value if none specified. */
|
||
if (config->bands[i].burst_size == 0) {
|
||
config->bands[i].burst_size = config->bands[i].rate;
|
||
}
|
||
|
||
meter->bands[i].up = config->bands[i];
|
||
/* Convert burst size to the bucket units: */
|
||
/* pkts => 1/1000 packets, kilobits => bits. */
|
||
meter->bands[i].up.burst_size *= 1000;
|
||
/* Initialize bucket to empty. */
|
||
meter->bands[i].bucket = 0;
|
||
|
||
/* Figure out max delta_t that is enough to fill any bucket. */
|
||
band_max_delta_t
|
||
= meter->bands[i].up.burst_size / meter->bands[i].up.rate;
|
||
if (band_max_delta_t > meter->max_delta_t) {
|
||
meter->max_delta_t = band_max_delta_t;
|
||
}
|
||
}
|
||
|
||
meter_lock(dp, mid);
|
||
dp_delete_meter(dp, mid); /* Free existing meter, if any */
|
||
dp->meters[mid] = meter;
|
||
meter_unlock(dp, mid);
|
||
|
||
return 0;
|
||
}
|
||
return ENOMEM;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_meter_get(const struct dpif *dpif,
|
||
ofproto_meter_id meter_id_,
|
||
struct ofputil_meter_stats *stats, uint16_t n_bands)
|
||
{
|
||
const struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
const struct dp_meter *meter;
|
||
uint32_t meter_id = meter_id_.uint32;
|
||
|
||
if (meter_id >= MAX_METERS) {
|
||
return EFBIG;
|
||
}
|
||
meter = dp->meters[meter_id];
|
||
if (!meter) {
|
||
return ENOENT;
|
||
}
|
||
if (stats) {
|
||
int i = 0;
|
||
|
||
meter_lock(dp, meter_id);
|
||
stats->packet_in_count = meter->packet_count;
|
||
stats->byte_in_count = meter->byte_count;
|
||
|
||
for (i = 0; i < n_bands && i < meter->n_bands; ++i) {
|
||
stats->bands[i].packet_count = meter->bands[i].packet_count;
|
||
stats->bands[i].byte_count = meter->bands[i].byte_count;
|
||
}
|
||
meter_unlock(dp, meter_id);
|
||
|
||
stats->n_bands = i;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_meter_del(struct dpif *dpif,
|
||
ofproto_meter_id meter_id_,
|
||
struct ofputil_meter_stats *stats, uint16_t n_bands)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
int error;
|
||
|
||
error = dpif_netdev_meter_get(dpif, meter_id_, stats, n_bands);
|
||
if (!error) {
|
||
uint32_t meter_id = meter_id_.uint32;
|
||
|
||
meter_lock(dp, meter_id);
|
||
dp_delete_meter(dp, meter_id);
|
||
meter_unlock(dp, meter_id);
|
||
}
|
||
return error;
|
||
}
|
||
|
||
|
||
static void
|
||
dpif_netdev_disable_upcall(struct dpif *dpif)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
dp_netdev_disable_upcall(dp);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_enable_upcall(struct dp_netdev *dp)
|
||
OVS_RELEASES(dp->upcall_rwlock)
|
||
{
|
||
fat_rwlock_unlock(&dp->upcall_rwlock);
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_enable_upcall(struct dpif *dpif)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
dp_netdev_enable_upcall(dp);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
ovs_mutex_lock(&pmd->cond_mutex);
|
||
atomic_store_relaxed(&pmd->reload, false);
|
||
pmd->last_reload_seq = seq_read(pmd->reload_seq);
|
||
xpthread_cond_signal(&pmd->cond);
|
||
ovs_mutex_unlock(&pmd->cond_mutex);
|
||
}
|
||
|
||
/* Finds and refs the dp_netdev_pmd_thread on core 'core_id'. Returns
|
||
* the pointer if succeeds, otherwise, NULL (it can return NULL even if
|
||
* 'core_id' is NON_PMD_CORE_ID).
|
||
*
|
||
* Caller must unrefs the returned reference. */
|
||
static struct dp_netdev_pmd_thread *
|
||
dp_netdev_get_pmd(struct dp_netdev *dp, unsigned core_id)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
const struct cmap_node *pnode;
|
||
|
||
pnode = cmap_find(&dp->poll_threads, hash_int(core_id, 0));
|
||
if (!pnode) {
|
||
return NULL;
|
||
}
|
||
pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
|
||
|
||
return dp_netdev_pmd_try_ref(pmd) ? pmd : NULL;
|
||
}
|
||
|
||
/* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
|
||
static void
|
||
dp_netdev_set_nonpmd(struct dp_netdev *dp)
|
||
OVS_REQUIRES(dp->port_mutex)
|
||
{
|
||
struct dp_netdev_pmd_thread *non_pmd;
|
||
|
||
non_pmd = xzalloc(sizeof *non_pmd);
|
||
dp_netdev_configure_pmd(non_pmd, dp, NON_PMD_CORE_ID, OVS_NUMA_UNSPEC);
|
||
}
|
||
|
||
/* Caller must have valid pointer to 'pmd'. */
|
||
static bool
|
||
dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
return ovs_refcount_try_ref_rcu(&pmd->ref_cnt);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
if (pmd && ovs_refcount_unref(&pmd->ref_cnt) == 1) {
|
||
ovsrcu_postpone(dp_netdev_destroy_pmd, pmd);
|
||
}
|
||
}
|
||
|
||
/* Given cmap position 'pos', tries to ref the next node. If try_ref()
|
||
* fails, keeps checking for next node until reaching the end of cmap.
|
||
*
|
||
* Caller must unrefs the returned reference. */
|
||
static struct dp_netdev_pmd_thread *
|
||
dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos)
|
||
{
|
||
struct dp_netdev_pmd_thread *next;
|
||
|
||
do {
|
||
struct cmap_node *node;
|
||
|
||
node = cmap_next_position(&dp->poll_threads, pos);
|
||
next = node ? CONTAINER_OF(node, struct dp_netdev_pmd_thread, node)
|
||
: NULL;
|
||
} while (next && !dp_netdev_pmd_try_ref(next));
|
||
|
||
return next;
|
||
}
|
||
|
||
/* Configures the 'pmd' based on the input argument. */
|
||
static void
|
||
dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
|
||
unsigned core_id, int numa_id)
|
||
{
|
||
pmd->dp = dp;
|
||
pmd->core_id = core_id;
|
||
pmd->numa_id = numa_id;
|
||
pmd->need_reload = false;
|
||
|
||
ovs_refcount_init(&pmd->ref_cnt);
|
||
latch_init(&pmd->exit_latch);
|
||
pmd->reload_seq = seq_create();
|
||
pmd->last_reload_seq = seq_read(pmd->reload_seq);
|
||
atomic_init(&pmd->reload, false);
|
||
xpthread_cond_init(&pmd->cond, NULL);
|
||
ovs_mutex_init(&pmd->cond_mutex);
|
||
ovs_mutex_init(&pmd->flow_mutex);
|
||
ovs_mutex_init(&pmd->port_mutex);
|
||
cmap_init(&pmd->flow_table);
|
||
cmap_init(&pmd->classifiers);
|
||
pmd->next_optimization = time_msec() + DPCLS_OPTIMIZATION_INTERVAL;
|
||
pmd->rxq_interval = time_msec() + PMD_RXQ_INTERVAL_LEN;
|
||
hmap_init(&pmd->poll_list);
|
||
hmap_init(&pmd->tx_ports);
|
||
hmap_init(&pmd->tnl_port_cache);
|
||
hmap_init(&pmd->send_port_cache);
|
||
/* init the 'flow_cache' since there is no
|
||
* actual thread created for NON_PMD_CORE_ID. */
|
||
if (core_id == NON_PMD_CORE_ID) {
|
||
emc_cache_init(&pmd->flow_cache);
|
||
pmd_alloc_static_tx_qid(pmd);
|
||
}
|
||
cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
|
||
hash_int(core_id, 0));
|
||
}
|
||
|
||
static void
|
||
dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
struct dpcls *cls;
|
||
|
||
dp_netdev_pmd_flow_flush(pmd);
|
||
hmap_destroy(&pmd->send_port_cache);
|
||
hmap_destroy(&pmd->tnl_port_cache);
|
||
hmap_destroy(&pmd->tx_ports);
|
||
hmap_destroy(&pmd->poll_list);
|
||
/* All flows (including their dpcls_rules) have been deleted already */
|
||
CMAP_FOR_EACH (cls, node, &pmd->classifiers) {
|
||
dpcls_destroy(cls);
|
||
ovsrcu_postpone(free, cls);
|
||
}
|
||
cmap_destroy(&pmd->classifiers);
|
||
cmap_destroy(&pmd->flow_table);
|
||
ovs_mutex_destroy(&pmd->flow_mutex);
|
||
latch_destroy(&pmd->exit_latch);
|
||
seq_destroy(pmd->reload_seq);
|
||
xpthread_cond_destroy(&pmd->cond);
|
||
ovs_mutex_destroy(&pmd->cond_mutex);
|
||
ovs_mutex_destroy(&pmd->port_mutex);
|
||
free(pmd);
|
||
}
|
||
|
||
/* Stops the pmd thread, removes it from the 'dp->poll_threads',
|
||
* and unrefs the struct. */
|
||
static void
|
||
dp_netdev_del_pmd(struct dp_netdev *dp, struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
/* NON_PMD_CORE_ID doesn't have a thread, so we don't have to synchronize,
|
||
* but extra cleanup is necessary */
|
||
if (pmd->core_id == NON_PMD_CORE_ID) {
|
||
ovs_mutex_lock(&dp->non_pmd_mutex);
|
||
emc_cache_uninit(&pmd->flow_cache);
|
||
pmd_free_cached_ports(pmd);
|
||
pmd_free_static_tx_qid(pmd);
|
||
ovs_mutex_unlock(&dp->non_pmd_mutex);
|
||
} else {
|
||
latch_set(&pmd->exit_latch);
|
||
dp_netdev_reload_pmd__(pmd);
|
||
xpthread_join(pmd->thread, NULL);
|
||
}
|
||
|
||
dp_netdev_pmd_clear_ports(pmd);
|
||
|
||
/* Purges the 'pmd''s flows after stopping the thread, but before
|
||
* destroying the flows, so that the flow stats can be collected. */
|
||
if (dp->dp_purge_cb) {
|
||
dp->dp_purge_cb(dp->dp_purge_aux, pmd->core_id);
|
||
}
|
||
cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
|
||
dp_netdev_pmd_unref(pmd);
|
||
}
|
||
|
||
/* Destroys all pmd threads. If 'non_pmd' is true it also destroys the non pmd
|
||
* thread. */
|
||
static void
|
||
dp_netdev_destroy_all_pmds(struct dp_netdev *dp, bool non_pmd)
|
||
{
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
struct dp_netdev_pmd_thread **pmd_list;
|
||
size_t k = 0, n_pmds;
|
||
|
||
n_pmds = cmap_count(&dp->poll_threads);
|
||
pmd_list = xcalloc(n_pmds, sizeof *pmd_list);
|
||
|
||
CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
|
||
if (!non_pmd && pmd->core_id == NON_PMD_CORE_ID) {
|
||
continue;
|
||
}
|
||
/* We cannot call dp_netdev_del_pmd(), since it alters
|
||
* 'dp->poll_threads' (while we're iterating it) and it
|
||
* might quiesce. */
|
||
ovs_assert(k < n_pmds);
|
||
pmd_list[k++] = pmd;
|
||
}
|
||
|
||
for (size_t i = 0; i < k; i++) {
|
||
dp_netdev_del_pmd(dp, pmd_list[i]);
|
||
}
|
||
free(pmd_list);
|
||
}
|
||
|
||
/* Deletes all rx queues from pmd->poll_list and all the ports from
|
||
* pmd->tx_ports. */
|
||
static void
|
||
dp_netdev_pmd_clear_ports(struct dp_netdev_pmd_thread *pmd)
|
||
{
|
||
struct rxq_poll *poll;
|
||
struct tx_port *port;
|
||
|
||
ovs_mutex_lock(&pmd->port_mutex);
|
||
HMAP_FOR_EACH_POP (poll, node, &pmd->poll_list) {
|
||
free(poll);
|
||
}
|
||
HMAP_FOR_EACH_POP (port, node, &pmd->tx_ports) {
|
||
free(port);
|
||
}
|
||
ovs_mutex_unlock(&pmd->port_mutex);
|
||
}
|
||
|
||
/* Adds rx queue to poll_list of PMD thread, if it's not there already. */
|
||
static void
|
||
dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_rxq *rxq)
|
||
OVS_REQUIRES(pmd->port_mutex)
|
||
{
|
||
int qid = netdev_rxq_get_queue_id(rxq->rx);
|
||
uint32_t hash = hash_2words(odp_to_u32(rxq->port->port_no), qid);
|
||
struct rxq_poll *poll;
|
||
|
||
HMAP_FOR_EACH_WITH_HASH (poll, node, hash, &pmd->poll_list) {
|
||
if (poll->rxq == rxq) {
|
||
/* 'rxq' is already polled by this thread. Do nothing. */
|
||
return;
|
||
}
|
||
}
|
||
|
||
poll = xmalloc(sizeof *poll);
|
||
poll->rxq = rxq;
|
||
hmap_insert(&pmd->poll_list, &poll->node, hash);
|
||
|
||
pmd->need_reload = true;
|
||
}
|
||
|
||
/* Delete 'poll' from poll_list of PMD thread. */
|
||
static void
|
||
dp_netdev_del_rxq_from_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct rxq_poll *poll)
|
||
OVS_REQUIRES(pmd->port_mutex)
|
||
{
|
||
hmap_remove(&pmd->poll_list, &poll->node);
|
||
free(poll);
|
||
|
||
pmd->need_reload = true;
|
||
}
|
||
|
||
/* Add 'port' to the tx port cache of 'pmd', which must be reloaded for the
|
||
* changes to take effect. */
|
||
static void
|
||
dp_netdev_add_port_tx_to_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_netdev_port *port)
|
||
OVS_REQUIRES(pmd->port_mutex)
|
||
{
|
||
struct tx_port *tx;
|
||
|
||
tx = tx_port_lookup(&pmd->tx_ports, port->port_no);
|
||
if (tx) {
|
||
/* 'port' is already on this thread tx cache. Do nothing. */
|
||
return;
|
||
}
|
||
|
||
tx = xzalloc(sizeof *tx);
|
||
|
||
tx->port = port;
|
||
tx->qid = -1;
|
||
|
||
hmap_insert(&pmd->tx_ports, &tx->node, hash_port_no(tx->port->port_no));
|
||
pmd->need_reload = true;
|
||
}
|
||
|
||
/* Del 'tx' from the tx port cache of 'pmd', which must be reloaded for the
|
||
* changes to take effect. */
|
||
static void
|
||
dp_netdev_del_port_tx_from_pmd(struct dp_netdev_pmd_thread *pmd,
|
||
struct tx_port *tx)
|
||
OVS_REQUIRES(pmd->port_mutex)
|
||
{
|
||
hmap_remove(&pmd->tx_ports, &tx->node);
|
||
free(tx);
|
||
pmd->need_reload = true;
|
||
}
|
||
|
||
static char *
|
||
dpif_netdev_get_datapath_version(void)
|
||
{
|
||
return xstrdup("<built-in>");
|
||
}
|
||
|
||
static void
|
||
dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow, int cnt, int size,
|
||
uint16_t tcp_flags, long long now)
|
||
{
|
||
uint16_t flags;
|
||
|
||
atomic_store_relaxed(&netdev_flow->stats.used, now);
|
||
non_atomic_ullong_add(&netdev_flow->stats.packet_count, cnt);
|
||
non_atomic_ullong_add(&netdev_flow->stats.byte_count, size);
|
||
atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
|
||
flags |= tcp_flags;
|
||
atomic_store_relaxed(&netdev_flow->stats.tcp_flags, flags);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_count_packet(struct dp_netdev_pmd_thread *pmd,
|
||
enum dp_stat_type type, int cnt)
|
||
{
|
||
non_atomic_ullong_add(&pmd->stats.n[type], cnt);
|
||
}
|
||
|
||
static int
|
||
dp_netdev_upcall(struct dp_netdev_pmd_thread *pmd, struct dp_packet *packet_,
|
||
struct flow *flow, struct flow_wildcards *wc, ovs_u128 *ufid,
|
||
enum dpif_upcall_type type, const struct nlattr *userdata,
|
||
struct ofpbuf *actions, struct ofpbuf *put_actions)
|
||
{
|
||
struct dp_netdev *dp = pmd->dp;
|
||
|
||
if (OVS_UNLIKELY(!dp->upcall_cb)) {
|
||
return ENODEV;
|
||
}
|
||
|
||
if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
|
||
struct ds ds = DS_EMPTY_INITIALIZER;
|
||
char *packet_str;
|
||
struct ofpbuf key;
|
||
struct odp_flow_key_parms odp_parms = {
|
||
.flow = flow,
|
||
.mask = wc ? &wc->masks : NULL,
|
||
.support = dp_netdev_support,
|
||
};
|
||
|
||
ofpbuf_init(&key, 0);
|
||
odp_flow_key_from_flow(&odp_parms, &key);
|
||
packet_str = ofp_dp_packet_to_string(packet_);
|
||
|
||
odp_flow_key_format(key.data, key.size, &ds);
|
||
|
||
VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
|
||
dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
|
||
|
||
ofpbuf_uninit(&key);
|
||
free(packet_str);
|
||
|
||
ds_destroy(&ds);
|
||
}
|
||
|
||
return dp->upcall_cb(packet_, flow, ufid, pmd->core_id, type, userdata,
|
||
actions, wc, put_actions, dp->upcall_aux);
|
||
}
|
||
|
||
static inline uint32_t
|
||
dpif_netdev_packet_get_rss_hash_orig_pkt(struct dp_packet *packet,
|
||
const struct miniflow *mf)
|
||
{
|
||
uint32_t hash;
|
||
|
||
if (OVS_LIKELY(dp_packet_rss_valid(packet))) {
|
||
hash = dp_packet_get_rss_hash(packet);
|
||
} else {
|
||
hash = miniflow_hash_5tuple(mf, 0);
|
||
dp_packet_set_rss_hash(packet, hash);
|
||
}
|
||
|
||
return hash;
|
||
}
|
||
|
||
static inline uint32_t
|
||
dpif_netdev_packet_get_rss_hash(struct dp_packet *packet,
|
||
const struct miniflow *mf)
|
||
{
|
||
uint32_t hash, recirc_depth;
|
||
|
||
if (OVS_LIKELY(dp_packet_rss_valid(packet))) {
|
||
hash = dp_packet_get_rss_hash(packet);
|
||
} else {
|
||
hash = miniflow_hash_5tuple(mf, 0);
|
||
dp_packet_set_rss_hash(packet, hash);
|
||
}
|
||
|
||
/* The RSS hash must account for the recirculation depth to avoid
|
||
* collisions in the exact match cache */
|
||
recirc_depth = *recirc_depth_get_unsafe();
|
||
if (OVS_UNLIKELY(recirc_depth)) {
|
||
hash = hash_finish(hash, recirc_depth);
|
||
dp_packet_set_rss_hash(packet, hash);
|
||
}
|
||
return hash;
|
||
}
|
||
|
||
struct packet_batch_per_flow {
|
||
unsigned int byte_count;
|
||
uint16_t tcp_flags;
|
||
struct dp_netdev_flow *flow;
|
||
|
||
struct dp_packet_batch array;
|
||
};
|
||
|
||
static inline void
|
||
packet_batch_per_flow_update(struct packet_batch_per_flow *batch,
|
||
struct dp_packet *packet,
|
||
const struct miniflow *mf)
|
||
{
|
||
batch->byte_count += dp_packet_size(packet);
|
||
batch->tcp_flags |= miniflow_get_tcp_flags(mf);
|
||
batch->array.packets[batch->array.count++] = packet;
|
||
}
|
||
|
||
static inline void
|
||
packet_batch_per_flow_init(struct packet_batch_per_flow *batch,
|
||
struct dp_netdev_flow *flow)
|
||
{
|
||
flow->batch = batch;
|
||
|
||
batch->flow = flow;
|
||
dp_packet_batch_init(&batch->array);
|
||
batch->byte_count = 0;
|
||
batch->tcp_flags = 0;
|
||
}
|
||
|
||
static inline void
|
||
packet_batch_per_flow_execute(struct packet_batch_per_flow *batch,
|
||
struct dp_netdev_pmd_thread *pmd,
|
||
long long now)
|
||
{
|
||
struct dp_netdev_actions *actions;
|
||
struct dp_netdev_flow *flow = batch->flow;
|
||
|
||
dp_netdev_flow_used(flow, batch->array.count, batch->byte_count,
|
||
batch->tcp_flags, now);
|
||
|
||
actions = dp_netdev_flow_get_actions(flow);
|
||
|
||
dp_netdev_execute_actions(pmd, &batch->array, true, &flow->flow,
|
||
actions->actions, actions->size, now);
|
||
}
|
||
|
||
static inline void
|
||
dp_netdev_queue_batches(struct dp_packet *pkt,
|
||
struct dp_netdev_flow *flow, const struct miniflow *mf,
|
||
struct packet_batch_per_flow *batches,
|
||
size_t *n_batches)
|
||
{
|
||
struct packet_batch_per_flow *batch = flow->batch;
|
||
|
||
if (OVS_UNLIKELY(!batch)) {
|
||
batch = &batches[(*n_batches)++];
|
||
packet_batch_per_flow_init(batch, flow);
|
||
}
|
||
|
||
packet_batch_per_flow_update(batch, pkt, mf);
|
||
}
|
||
|
||
/* Try to process all ('cnt') the 'packets' using only the exact match cache
|
||
* 'pmd->flow_cache'. If a flow is not found for a packet 'packets[i]', the
|
||
* miniflow is copied into 'keys' and the packet pointer is moved at the
|
||
* beginning of the 'packets' array.
|
||
*
|
||
* The function returns the number of packets that needs to be processed in the
|
||
* 'packets' array (they have been moved to the beginning of the vector).
|
||
*
|
||
* For performance reasons a caller may choose not to initialize the metadata
|
||
* in 'packets_'. If 'md_is_valid' is false, the metadata in 'packets'
|
||
* is not valid and must be initialized by this function using 'port_no'.
|
||
* If 'md_is_valid' is true, the metadata is already valid and 'port_no'
|
||
* will be ignored.
|
||
*/
|
||
static inline size_t
|
||
emc_processing(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets_,
|
||
struct netdev_flow_key *keys,
|
||
struct packet_batch_per_flow batches[], size_t *n_batches,
|
||
bool md_is_valid, odp_port_t port_no)
|
||
{
|
||
struct emc_cache *flow_cache = &pmd->flow_cache;
|
||
struct netdev_flow_key *key = &keys[0];
|
||
size_t n_missed = 0, n_dropped = 0;
|
||
struct dp_packet *packet;
|
||
const size_t cnt = dp_packet_batch_size(packets_);
|
||
uint32_t cur_min;
|
||
int i;
|
||
|
||
atomic_read_relaxed(&pmd->dp->emc_insert_min, &cur_min);
|
||
|
||
DP_PACKET_BATCH_REFILL_FOR_EACH (i, cnt, packet, packets_) {
|
||
struct dp_netdev_flow *flow;
|
||
|
||
if (OVS_UNLIKELY(dp_packet_size(packet) < ETH_HEADER_LEN)) {
|
||
dp_packet_delete(packet);
|
||
n_dropped++;
|
||
continue;
|
||
}
|
||
|
||
if (i != cnt - 1) {
|
||
struct dp_packet **packets = packets_->packets;
|
||
/* Prefetch next packet data and metadata. */
|
||
OVS_PREFETCH(dp_packet_data(packets[i+1]));
|
||
pkt_metadata_prefetch_init(&packets[i+1]->md);
|
||
}
|
||
|
||
if (!md_is_valid) {
|
||
pkt_metadata_init(&packet->md, port_no);
|
||
}
|
||
miniflow_extract(packet, &key->mf);
|
||
key->len = 0; /* Not computed yet. */
|
||
/* If EMC is disabled skip hash computation and emc_lookup */
|
||
if (cur_min) {
|
||
if (!md_is_valid) {
|
||
key->hash = dpif_netdev_packet_get_rss_hash_orig_pkt(packet,
|
||
&key->mf);
|
||
} else {
|
||
key->hash = dpif_netdev_packet_get_rss_hash(packet, &key->mf);
|
||
}
|
||
flow = emc_lookup(flow_cache, key);
|
||
} else {
|
||
flow = NULL;
|
||
}
|
||
if (OVS_LIKELY(flow)) {
|
||
dp_netdev_queue_batches(packet, flow, &key->mf, batches,
|
||
n_batches);
|
||
} else {
|
||
/* Exact match cache missed. Group missed packets together at
|
||
* the beginning of the 'packets' array. */
|
||
dp_packet_batch_refill(packets_, packet, i);
|
||
/* 'key[n_missed]' contains the key of the current packet and it
|
||
* must be returned to the caller. The next key should be extracted
|
||
* to 'keys[n_missed + 1]'. */
|
||
key = &keys[++n_missed];
|
||
}
|
||
}
|
||
|
||
dp_netdev_count_packet(pmd, DP_STAT_EXACT_HIT,
|
||
cnt - n_dropped - n_missed);
|
||
|
||
return dp_packet_batch_size(packets_);
|
||
}
|
||
|
||
static inline void
|
||
handle_packet_upcall(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet *packet,
|
||
const struct netdev_flow_key *key,
|
||
struct ofpbuf *actions, struct ofpbuf *put_actions,
|
||
int *lost_cnt, long long now)
|
||
{
|
||
struct ofpbuf *add_actions;
|
||
struct dp_packet_batch b;
|
||
struct match match;
|
||
ovs_u128 ufid;
|
||
int error;
|
||
|
||
match.tun_md.valid = false;
|
||
miniflow_expand(&key->mf, &match.flow);
|
||
|
||
ofpbuf_clear(actions);
|
||
ofpbuf_clear(put_actions);
|
||
|
||
dpif_flow_hash(pmd->dp->dpif, &match.flow, sizeof match.flow, &ufid);
|
||
error = dp_netdev_upcall(pmd, packet, &match.flow, &match.wc,
|
||
&ufid, DPIF_UC_MISS, NULL, actions,
|
||
put_actions);
|
||
if (OVS_UNLIKELY(error && error != ENOSPC)) {
|
||
dp_packet_delete(packet);
|
||
(*lost_cnt)++;
|
||
return;
|
||
}
|
||
|
||
/* The Netlink encoding of datapath flow keys cannot express
|
||
* wildcarding the presence of a VLAN tag. Instead, a missing VLAN
|
||
* tag is interpreted as exact match on the fact that there is no
|
||
* VLAN. Unless we refactor a lot of code that translates between
|
||
* Netlink and struct flow representations, we have to do the same
|
||
* here. */
|
||
if (!match.wc.masks.vlans[0].tci) {
|
||
match.wc.masks.vlans[0].tci = htons(0xffff);
|
||
}
|
||
|
||
/* We can't allow the packet batching in the next loop to execute
|
||
* the actions. Otherwise, if there are any slow path actions,
|
||
* we'll send the packet up twice. */
|
||
dp_packet_batch_init_packet(&b, packet);
|
||
dp_netdev_execute_actions(pmd, &b, true, &match.flow,
|
||
actions->data, actions->size, now);
|
||
|
||
add_actions = put_actions->size ? put_actions : actions;
|
||
if (OVS_LIKELY(error != ENOSPC)) {
|
||
struct dp_netdev_flow *netdev_flow;
|
||
|
||
/* XXX: There's a race window where a flow covering this packet
|
||
* could have already been installed since we last did the flow
|
||
* lookup before upcall. This could be solved by moving the
|
||
* mutex lock outside the loop, but that's an awful long time
|
||
* to be locking everyone out of making flow installs. If we
|
||
* move to a per-core classifier, it would be reasonable. */
|
||
ovs_mutex_lock(&pmd->flow_mutex);
|
||
netdev_flow = dp_netdev_pmd_lookup_flow(pmd, key, NULL);
|
||
if (OVS_LIKELY(!netdev_flow)) {
|
||
netdev_flow = dp_netdev_flow_add(pmd, &match, &ufid,
|
||
add_actions->data,
|
||
add_actions->size);
|
||
}
|
||
ovs_mutex_unlock(&pmd->flow_mutex);
|
||
emc_probabilistic_insert(pmd, key, netdev_flow);
|
||
}
|
||
}
|
||
|
||
static inline void
|
||
fast_path_processing(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets_,
|
||
struct netdev_flow_key *keys,
|
||
struct packet_batch_per_flow batches[], size_t *n_batches,
|
||
odp_port_t in_port,
|
||
long long now)
|
||
{
|
||
const size_t cnt = dp_packet_batch_size(packets_);
|
||
#if !defined(__CHECKER__) && !defined(_WIN32)
|
||
const size_t PKT_ARRAY_SIZE = cnt;
|
||
#else
|
||
/* Sparse or MSVC doesn't like variable length array. */
|
||
enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST };
|
||
#endif
|
||
struct dp_packet *packet;
|
||
struct dpcls *cls;
|
||
struct dpcls_rule *rules[PKT_ARRAY_SIZE];
|
||
struct dp_netdev *dp = pmd->dp;
|
||
int miss_cnt = 0, lost_cnt = 0;
|
||
int lookup_cnt = 0, add_lookup_cnt;
|
||
bool any_miss;
|
||
size_t i;
|
||
|
||
for (i = 0; i < cnt; i++) {
|
||
/* Key length is needed in all the cases, hash computed on demand. */
|
||
keys[i].len = netdev_flow_key_size(miniflow_n_values(&keys[i].mf));
|
||
}
|
||
/* Get the classifier for the in_port */
|
||
cls = dp_netdev_pmd_lookup_dpcls(pmd, in_port);
|
||
if (OVS_LIKELY(cls)) {
|
||
any_miss = !dpcls_lookup(cls, keys, rules, cnt, &lookup_cnt);
|
||
} else {
|
||
any_miss = true;
|
||
memset(rules, 0, sizeof(rules));
|
||
}
|
||
if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
|
||
uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
|
||
struct ofpbuf actions, put_actions;
|
||
|
||
ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
|
||
ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
struct dp_netdev_flow *netdev_flow;
|
||
|
||
if (OVS_LIKELY(rules[i])) {
|
||
continue;
|
||
}
|
||
|
||
/* It's possible that an earlier slow path execution installed
|
||
* a rule covering this flow. In this case, it's a lot cheaper
|
||
* to catch it here than execute a miss. */
|
||
netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &keys[i],
|
||
&add_lookup_cnt);
|
||
if (netdev_flow) {
|
||
lookup_cnt += add_lookup_cnt;
|
||
rules[i] = &netdev_flow->cr;
|
||
continue;
|
||
}
|
||
|
||
miss_cnt++;
|
||
handle_packet_upcall(pmd, packet, &keys[i], &actions,
|
||
&put_actions, &lost_cnt, now);
|
||
}
|
||
|
||
ofpbuf_uninit(&actions);
|
||
ofpbuf_uninit(&put_actions);
|
||
fat_rwlock_unlock(&dp->upcall_rwlock);
|
||
} else if (OVS_UNLIKELY(any_miss)) {
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
if (OVS_UNLIKELY(!rules[i])) {
|
||
dp_packet_delete(packet);
|
||
lost_cnt++;
|
||
miss_cnt++;
|
||
}
|
||
}
|
||
}
|
||
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
struct dp_netdev_flow *flow;
|
||
|
||
if (OVS_UNLIKELY(!rules[i])) {
|
||
continue;
|
||
}
|
||
|
||
flow = dp_netdev_flow_cast(rules[i]);
|
||
|
||
emc_probabilistic_insert(pmd, &keys[i], flow);
|
||
dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches, n_batches);
|
||
}
|
||
|
||
dp_netdev_count_packet(pmd, DP_STAT_MASKED_HIT, cnt - miss_cnt);
|
||
dp_netdev_count_packet(pmd, DP_STAT_LOOKUP_HIT, lookup_cnt);
|
||
dp_netdev_count_packet(pmd, DP_STAT_MISS, miss_cnt);
|
||
dp_netdev_count_packet(pmd, DP_STAT_LOST, lost_cnt);
|
||
}
|
||
|
||
/* Packets enter the datapath from a port (or from recirculation) here.
|
||
*
|
||
* When 'md_is_valid' is true the metadata in 'packets' are already valid.
|
||
* When false the metadata in 'packets' need to be initialized. */
|
||
static void
|
||
dp_netdev_input__(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets,
|
||
bool md_is_valid, odp_port_t port_no)
|
||
{
|
||
#if !defined(__CHECKER__) && !defined(_WIN32)
|
||
const size_t PKT_ARRAY_SIZE = dp_packet_batch_size(packets);
|
||
#else
|
||
/* Sparse or MSVC doesn't like variable length array. */
|
||
enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST };
|
||
#endif
|
||
OVS_ALIGNED_VAR(CACHE_LINE_SIZE)
|
||
struct netdev_flow_key keys[PKT_ARRAY_SIZE];
|
||
struct packet_batch_per_flow batches[PKT_ARRAY_SIZE];
|
||
long long now = time_msec();
|
||
size_t n_batches;
|
||
odp_port_t in_port;
|
||
|
||
n_batches = 0;
|
||
emc_processing(pmd, packets, keys, batches, &n_batches,
|
||
md_is_valid, port_no);
|
||
if (!dp_packet_batch_is_empty(packets)) {
|
||
/* Get ingress port from first packet's metadata. */
|
||
in_port = packets->packets[0]->md.in_port.odp_port;
|
||
fast_path_processing(pmd, packets, keys, batches, &n_batches,
|
||
in_port, now);
|
||
}
|
||
|
||
/* All the flow batches need to be reset before any call to
|
||
* packet_batch_per_flow_execute() as it could potentially trigger
|
||
* recirculation. When a packet matching flow ‘j’ happens to be
|
||
* recirculated, the nested call to dp_netdev_input__() could potentially
|
||
* classify the packet as matching another flow - say 'k'. It could happen
|
||
* that in the previous call to dp_netdev_input__() that same flow 'k' had
|
||
* already its own batches[k] still waiting to be served. So if its
|
||
* ‘batch’ member is not reset, the recirculated packet would be wrongly
|
||
* appended to batches[k] of the 1st call to dp_netdev_input__(). */
|
||
size_t i;
|
||
for (i = 0; i < n_batches; i++) {
|
||
batches[i].flow->batch = NULL;
|
||
}
|
||
|
||
for (i = 0; i < n_batches; i++) {
|
||
packet_batch_per_flow_execute(&batches[i], pmd, now);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets,
|
||
odp_port_t port_no)
|
||
{
|
||
dp_netdev_input__(pmd, packets, false, port_no);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_recirculate(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets)
|
||
{
|
||
dp_netdev_input__(pmd, packets, true, 0);
|
||
}
|
||
|
||
struct dp_netdev_execute_aux {
|
||
struct dp_netdev_pmd_thread *pmd;
|
||
long long now;
|
||
const struct flow *flow;
|
||
};
|
||
|
||
static void
|
||
dpif_netdev_register_dp_purge_cb(struct dpif *dpif, dp_purge_callback *cb,
|
||
void *aux)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
dp->dp_purge_aux = aux;
|
||
dp->dp_purge_cb = cb;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
|
||
void *aux)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
dp->upcall_aux = aux;
|
||
dp->upcall_cb = cb;
|
||
}
|
||
|
||
static void
|
||
dpif_netdev_xps_revalidate_pmd(const struct dp_netdev_pmd_thread *pmd,
|
||
long long now, bool purge)
|
||
{
|
||
struct tx_port *tx;
|
||
struct dp_netdev_port *port;
|
||
long long interval;
|
||
|
||
HMAP_FOR_EACH (tx, node, &pmd->send_port_cache) {
|
||
if (!tx->port->dynamic_txqs) {
|
||
continue;
|
||
}
|
||
interval = now - tx->last_used;
|
||
if (tx->qid >= 0 && (purge || interval >= XPS_TIMEOUT_MS)) {
|
||
port = tx->port;
|
||
ovs_mutex_lock(&port->txq_used_mutex);
|
||
port->txq_used[tx->qid]--;
|
||
ovs_mutex_unlock(&port->txq_used_mutex);
|
||
tx->qid = -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_xps_get_tx_qid(const struct dp_netdev_pmd_thread *pmd,
|
||
struct tx_port *tx, long long now)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
long long interval;
|
||
int i, min_cnt, min_qid;
|
||
|
||
if (OVS_UNLIKELY(!now)) {
|
||
now = time_msec();
|
||
}
|
||
|
||
interval = now - tx->last_used;
|
||
tx->last_used = now;
|
||
|
||
if (OVS_LIKELY(tx->qid >= 0 && interval < XPS_TIMEOUT_MS)) {
|
||
return tx->qid;
|
||
}
|
||
|
||
port = tx->port;
|
||
|
||
ovs_mutex_lock(&port->txq_used_mutex);
|
||
if (tx->qid >= 0) {
|
||
port->txq_used[tx->qid]--;
|
||
tx->qid = -1;
|
||
}
|
||
|
||
min_cnt = -1;
|
||
min_qid = 0;
|
||
for (i = 0; i < netdev_n_txq(port->netdev); i++) {
|
||
if (port->txq_used[i] < min_cnt || min_cnt == -1) {
|
||
min_cnt = port->txq_used[i];
|
||
min_qid = i;
|
||
}
|
||
}
|
||
|
||
port->txq_used[min_qid]++;
|
||
tx->qid = min_qid;
|
||
|
||
ovs_mutex_unlock(&port->txq_used_mutex);
|
||
|
||
dpif_netdev_xps_revalidate_pmd(pmd, now, false);
|
||
|
||
VLOG_DBG("Core %d: New TX queue ID %d for port \'%s\'.",
|
||
pmd->core_id, tx->qid, netdev_get_name(tx->port->netdev));
|
||
return min_qid;
|
||
}
|
||
|
||
static struct tx_port *
|
||
pmd_tnl_port_cache_lookup(const struct dp_netdev_pmd_thread *pmd,
|
||
odp_port_t port_no)
|
||
{
|
||
return tx_port_lookup(&pmd->tnl_port_cache, port_no);
|
||
}
|
||
|
||
static struct tx_port *
|
||
pmd_send_port_cache_lookup(const struct dp_netdev_pmd_thread *pmd,
|
||
odp_port_t port_no)
|
||
{
|
||
return tx_port_lookup(&pmd->send_port_cache, port_no);
|
||
}
|
||
|
||
static int
|
||
push_tnl_action(const struct dp_netdev_pmd_thread *pmd,
|
||
const struct nlattr *attr,
|
||
struct dp_packet_batch *batch)
|
||
{
|
||
struct tx_port *tun_port;
|
||
const struct ovs_action_push_tnl *data;
|
||
int err;
|
||
|
||
data = nl_attr_get(attr);
|
||
|
||
tun_port = pmd_tnl_port_cache_lookup(pmd, data->tnl_port);
|
||
if (!tun_port) {
|
||
err = -EINVAL;
|
||
goto error;
|
||
}
|
||
err = netdev_push_header(tun_port->port->netdev, batch, data);
|
||
if (!err) {
|
||
return 0;
|
||
}
|
||
error:
|
||
dp_packet_delete_batch(batch, true);
|
||
return err;
|
||
}
|
||
|
||
static void
|
||
dp_execute_userspace_action(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet *packet, bool may_steal,
|
||
struct flow *flow, ovs_u128 *ufid,
|
||
struct ofpbuf *actions,
|
||
const struct nlattr *userdata, long long now)
|
||
{
|
||
struct dp_packet_batch b;
|
||
int error;
|
||
|
||
ofpbuf_clear(actions);
|
||
|
||
error = dp_netdev_upcall(pmd, packet, flow, NULL, ufid,
|
||
DPIF_UC_ACTION, userdata, actions,
|
||
NULL);
|
||
if (!error || error == ENOSPC) {
|
||
dp_packet_batch_init_packet(&b, packet);
|
||
dp_netdev_execute_actions(pmd, &b, may_steal, flow,
|
||
actions->data, actions->size, now);
|
||
} else if (may_steal) {
|
||
dp_packet_delete(packet);
|
||
}
|
||
}
|
||
|
||
static void
|
||
dp_execute_cb(void *aux_, struct dp_packet_batch *packets_,
|
||
const struct nlattr *a, bool may_steal)
|
||
OVS_NO_THREAD_SAFETY_ANALYSIS
|
||
{
|
||
struct dp_netdev_execute_aux *aux = aux_;
|
||
uint32_t *depth = recirc_depth_get();
|
||
struct dp_netdev_pmd_thread *pmd = aux->pmd;
|
||
struct dp_netdev *dp = pmd->dp;
|
||
int type = nl_attr_type(a);
|
||
long long now = aux->now;
|
||
struct tx_port *p;
|
||
|
||
switch ((enum ovs_action_attr)type) {
|
||
case OVS_ACTION_ATTR_OUTPUT:
|
||
p = pmd_send_port_cache_lookup(pmd, nl_attr_get_odp_port(a));
|
||
if (OVS_LIKELY(p)) {
|
||
int tx_qid;
|
||
bool dynamic_txqs;
|
||
|
||
dynamic_txqs = p->port->dynamic_txqs;
|
||
if (dynamic_txqs) {
|
||
tx_qid = dpif_netdev_xps_get_tx_qid(pmd, p, now);
|
||
} else {
|
||
tx_qid = pmd->static_tx_qid;
|
||
}
|
||
|
||
netdev_send(p->port->netdev, tx_qid, packets_, may_steal,
|
||
dynamic_txqs);
|
||
return;
|
||
}
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_TUNNEL_PUSH:
|
||
if (*depth < MAX_RECIRC_DEPTH) {
|
||
dp_packet_batch_apply_cutlen(packets_);
|
||
push_tnl_action(pmd, a, packets_);
|
||
return;
|
||
}
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_TUNNEL_POP:
|
||
if (*depth < MAX_RECIRC_DEPTH) {
|
||
struct dp_packet_batch *orig_packets_ = packets_;
|
||
odp_port_t portno = nl_attr_get_odp_port(a);
|
||
|
||
p = pmd_tnl_port_cache_lookup(pmd, portno);
|
||
if (p) {
|
||
struct dp_packet_batch tnl_pkt;
|
||
|
||
if (!may_steal) {
|
||
dp_packet_batch_clone(&tnl_pkt, packets_);
|
||
packets_ = &tnl_pkt;
|
||
dp_packet_batch_reset_cutlen(orig_packets_);
|
||
}
|
||
|
||
dp_packet_batch_apply_cutlen(packets_);
|
||
|
||
netdev_pop_header(p->port->netdev, packets_);
|
||
if (dp_packet_batch_is_empty(packets_)) {
|
||
return;
|
||
}
|
||
|
||
struct dp_packet *packet;
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
packet->md.in_port.odp_port = portno;
|
||
}
|
||
|
||
(*depth)++;
|
||
dp_netdev_recirculate(pmd, packets_);
|
||
(*depth)--;
|
||
return;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_USERSPACE:
|
||
if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
|
||
struct dp_packet_batch *orig_packets_ = packets_;
|
||
const struct nlattr *userdata;
|
||
struct dp_packet_batch usr_pkt;
|
||
struct ofpbuf actions;
|
||
struct flow flow;
|
||
ovs_u128 ufid;
|
||
bool clone = false;
|
||
|
||
userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
|
||
ofpbuf_init(&actions, 0);
|
||
|
||
if (packets_->trunc) {
|
||
if (!may_steal) {
|
||
dp_packet_batch_clone(&usr_pkt, packets_);
|
||
packets_ = &usr_pkt;
|
||
clone = true;
|
||
dp_packet_batch_reset_cutlen(orig_packets_);
|
||
}
|
||
|
||
dp_packet_batch_apply_cutlen(packets_);
|
||
}
|
||
|
||
struct dp_packet *packet;
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
flow_extract(packet, &flow);
|
||
dpif_flow_hash(dp->dpif, &flow, sizeof flow, &ufid);
|
||
dp_execute_userspace_action(pmd, packet, may_steal, &flow,
|
||
&ufid, &actions, userdata, now);
|
||
}
|
||
|
||
if (clone) {
|
||
dp_packet_delete_batch(packets_, true);
|
||
}
|
||
|
||
ofpbuf_uninit(&actions);
|
||
fat_rwlock_unlock(&dp->upcall_rwlock);
|
||
|
||
return;
|
||
}
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_RECIRC:
|
||
if (*depth < MAX_RECIRC_DEPTH) {
|
||
struct dp_packet_batch recirc_pkts;
|
||
|
||
if (!may_steal) {
|
||
dp_packet_batch_clone(&recirc_pkts, packets_);
|
||
packets_ = &recirc_pkts;
|
||
}
|
||
|
||
struct dp_packet *packet;
|
||
DP_PACKET_BATCH_FOR_EACH (packet, packets_) {
|
||
packet->md.recirc_id = nl_attr_get_u32(a);
|
||
}
|
||
|
||
(*depth)++;
|
||
dp_netdev_recirculate(pmd, packets_);
|
||
(*depth)--;
|
||
|
||
return;
|
||
}
|
||
|
||
VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_CT: {
|
||
const struct nlattr *b;
|
||
bool force = false;
|
||
bool commit = false;
|
||
unsigned int left;
|
||
uint16_t zone = 0;
|
||
const char *helper = NULL;
|
||
const uint32_t *setmark = NULL;
|
||
const struct ovs_key_ct_labels *setlabel = NULL;
|
||
struct nat_action_info_t nat_action_info;
|
||
struct nat_action_info_t *nat_action_info_ref = NULL;
|
||
bool nat_config = false;
|
||
|
||
NL_ATTR_FOR_EACH_UNSAFE (b, left, nl_attr_get(a),
|
||
nl_attr_get_size(a)) {
|
||
enum ovs_ct_attr sub_type = nl_attr_type(b);
|
||
|
||
switch(sub_type) {
|
||
case OVS_CT_ATTR_FORCE_COMMIT:
|
||
force = true;
|
||
/* fall through. */
|
||
case OVS_CT_ATTR_COMMIT:
|
||
commit = true;
|
||
break;
|
||
case OVS_CT_ATTR_ZONE:
|
||
zone = nl_attr_get_u16(b);
|
||
break;
|
||
case OVS_CT_ATTR_HELPER:
|
||
helper = nl_attr_get_string(b);
|
||
break;
|
||
case OVS_CT_ATTR_MARK:
|
||
setmark = nl_attr_get(b);
|
||
break;
|
||
case OVS_CT_ATTR_LABELS:
|
||
setlabel = nl_attr_get(b);
|
||
break;
|
||
case OVS_CT_ATTR_EVENTMASK:
|
||
/* Silently ignored, as userspace datapath does not generate
|
||
* netlink events. */
|
||
break;
|
||
case OVS_CT_ATTR_NAT: {
|
||
const struct nlattr *b_nest;
|
||
unsigned int left_nest;
|
||
bool ip_min_specified = false;
|
||
bool proto_num_min_specified = false;
|
||
bool ip_max_specified = false;
|
||
bool proto_num_max_specified = false;
|
||
memset(&nat_action_info, 0, sizeof nat_action_info);
|
||
nat_action_info_ref = &nat_action_info;
|
||
|
||
NL_NESTED_FOR_EACH_UNSAFE (b_nest, left_nest, b) {
|
||
enum ovs_nat_attr sub_type_nest = nl_attr_type(b_nest);
|
||
|
||
switch (sub_type_nest) {
|
||
case OVS_NAT_ATTR_SRC:
|
||
case OVS_NAT_ATTR_DST:
|
||
nat_config = true;
|
||
nat_action_info.nat_action |=
|
||
((sub_type_nest == OVS_NAT_ATTR_SRC)
|
||
? NAT_ACTION_SRC : NAT_ACTION_DST);
|
||
break;
|
||
case OVS_NAT_ATTR_IP_MIN:
|
||
memcpy(&nat_action_info.min_addr,
|
||
nl_attr_get(b_nest),
|
||
nl_attr_get_size(b_nest));
|
||
ip_min_specified = true;
|
||
break;
|
||
case OVS_NAT_ATTR_IP_MAX:
|
||
memcpy(&nat_action_info.max_addr,
|
||
nl_attr_get(b_nest),
|
||
nl_attr_get_size(b_nest));
|
||
ip_max_specified = true;
|
||
break;
|
||
case OVS_NAT_ATTR_PROTO_MIN:
|
||
nat_action_info.min_port =
|
||
nl_attr_get_u16(b_nest);
|
||
proto_num_min_specified = true;
|
||
break;
|
||
case OVS_NAT_ATTR_PROTO_MAX:
|
||
nat_action_info.max_port =
|
||
nl_attr_get_u16(b_nest);
|
||
proto_num_max_specified = true;
|
||
break;
|
||
case OVS_NAT_ATTR_PERSISTENT:
|
||
case OVS_NAT_ATTR_PROTO_HASH:
|
||
case OVS_NAT_ATTR_PROTO_RANDOM:
|
||
break;
|
||
case OVS_NAT_ATTR_UNSPEC:
|
||
case __OVS_NAT_ATTR_MAX:
|
||
OVS_NOT_REACHED();
|
||
}
|
||
}
|
||
|
||
if (ip_min_specified && !ip_max_specified) {
|
||
nat_action_info.max_addr = nat_action_info.min_addr;
|
||
}
|
||
if (proto_num_min_specified && !proto_num_max_specified) {
|
||
nat_action_info.max_port = nat_action_info.min_port;
|
||
}
|
||
if (proto_num_min_specified || proto_num_max_specified) {
|
||
if (nat_action_info.nat_action & NAT_ACTION_SRC) {
|
||
nat_action_info.nat_action |= NAT_ACTION_SRC_PORT;
|
||
} else if (nat_action_info.nat_action & NAT_ACTION_DST) {
|
||
nat_action_info.nat_action |= NAT_ACTION_DST_PORT;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case OVS_CT_ATTR_UNSPEC:
|
||
case __OVS_CT_ATTR_MAX:
|
||
OVS_NOT_REACHED();
|
||
}
|
||
}
|
||
|
||
/* We won't be able to function properly in this case, hence
|
||
* complain loudly. */
|
||
if (nat_config && !commit) {
|
||
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
|
||
VLOG_WARN_RL(&rl, "NAT specified without commit.");
|
||
}
|
||
|
||
conntrack_execute(&dp->conntrack, packets_, aux->flow->dl_type, force,
|
||
commit, zone, setmark, setlabel, helper,
|
||
nat_action_info_ref, now);
|
||
break;
|
||
}
|
||
|
||
case OVS_ACTION_ATTR_METER:
|
||
dp_netdev_run_meter(pmd->dp, packets_, nl_attr_get_u32(a),
|
||
time_msec());
|
||
break;
|
||
|
||
case OVS_ACTION_ATTR_PUSH_VLAN:
|
||
case OVS_ACTION_ATTR_POP_VLAN:
|
||
case OVS_ACTION_ATTR_PUSH_MPLS:
|
||
case OVS_ACTION_ATTR_POP_MPLS:
|
||
case OVS_ACTION_ATTR_SET:
|
||
case OVS_ACTION_ATTR_SET_MASKED:
|
||
case OVS_ACTION_ATTR_SAMPLE:
|
||
case OVS_ACTION_ATTR_HASH:
|
||
case OVS_ACTION_ATTR_UNSPEC:
|
||
case OVS_ACTION_ATTR_TRUNC:
|
||
case OVS_ACTION_ATTR_PUSH_ETH:
|
||
case OVS_ACTION_ATTR_POP_ETH:
|
||
case OVS_ACTION_ATTR_CLONE:
|
||
case OVS_ACTION_ATTR_ENCAP_NSH:
|
||
case OVS_ACTION_ATTR_DECAP_NSH:
|
||
case __OVS_ACTION_ATTR_MAX:
|
||
OVS_NOT_REACHED();
|
||
}
|
||
|
||
dp_packet_delete_batch(packets_, may_steal);
|
||
}
|
||
|
||
static void
|
||
dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
|
||
struct dp_packet_batch *packets,
|
||
bool may_steal, const struct flow *flow,
|
||
const struct nlattr *actions, size_t actions_len,
|
||
long long now)
|
||
{
|
||
struct dp_netdev_execute_aux aux = { pmd, now, flow };
|
||
|
||
odp_execute_actions(&aux, packets, may_steal, actions,
|
||
actions_len, dp_execute_cb);
|
||
}
|
||
|
||
struct dp_netdev_ct_dump {
|
||
struct ct_dpif_dump_state up;
|
||
struct conntrack_dump dump;
|
||
struct conntrack *ct;
|
||
struct dp_netdev *dp;
|
||
};
|
||
|
||
static int
|
||
dpif_netdev_ct_dump_start(struct dpif *dpif, struct ct_dpif_dump_state **dump_,
|
||
const uint16_t *pzone, int *ptot_bkts)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
struct dp_netdev_ct_dump *dump;
|
||
|
||
dump = xzalloc(sizeof *dump);
|
||
dump->dp = dp;
|
||
dump->ct = &dp->conntrack;
|
||
|
||
conntrack_dump_start(&dp->conntrack, &dump->dump, pzone, ptot_bkts);
|
||
|
||
*dump_ = &dump->up;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_ct_dump_next(struct dpif *dpif OVS_UNUSED,
|
||
struct ct_dpif_dump_state *dump_,
|
||
struct ct_dpif_entry *entry)
|
||
{
|
||
struct dp_netdev_ct_dump *dump;
|
||
|
||
INIT_CONTAINER(dump, dump_, up);
|
||
|
||
return conntrack_dump_next(&dump->dump, entry);
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_ct_dump_done(struct dpif *dpif OVS_UNUSED,
|
||
struct ct_dpif_dump_state *dump_)
|
||
{
|
||
struct dp_netdev_ct_dump *dump;
|
||
int err;
|
||
|
||
INIT_CONTAINER(dump, dump_, up);
|
||
|
||
err = conntrack_dump_done(&dump->dump);
|
||
|
||
free(dump);
|
||
|
||
return err;
|
||
}
|
||
|
||
static int
|
||
dpif_netdev_ct_flush(struct dpif *dpif, const uint16_t *zone)
|
||
{
|
||
struct dp_netdev *dp = get_dp_netdev(dpif);
|
||
|
||
return conntrack_flush(&dp->conntrack, zone);
|
||
}
|
||
|
||
const struct dpif_class dpif_netdev_class = {
|
||
"netdev",
|
||
dpif_netdev_init,
|
||
dpif_netdev_enumerate,
|
||
dpif_netdev_port_open_type,
|
||
dpif_netdev_open,
|
||
dpif_netdev_close,
|
||
dpif_netdev_destroy,
|
||
dpif_netdev_run,
|
||
dpif_netdev_wait,
|
||
dpif_netdev_get_stats,
|
||
dpif_netdev_port_add,
|
||
dpif_netdev_port_del,
|
||
dpif_netdev_port_set_config,
|
||
dpif_netdev_port_query_by_number,
|
||
dpif_netdev_port_query_by_name,
|
||
NULL, /* port_get_pid */
|
||
dpif_netdev_port_dump_start,
|
||
dpif_netdev_port_dump_next,
|
||
dpif_netdev_port_dump_done,
|
||
dpif_netdev_port_poll,
|
||
dpif_netdev_port_poll_wait,
|
||
dpif_netdev_flow_flush,
|
||
dpif_netdev_flow_dump_create,
|
||
dpif_netdev_flow_dump_destroy,
|
||
dpif_netdev_flow_dump_thread_create,
|
||
dpif_netdev_flow_dump_thread_destroy,
|
||
dpif_netdev_flow_dump_next,
|
||
dpif_netdev_operate,
|
||
NULL, /* recv_set */
|
||
NULL, /* handlers_set */
|
||
dpif_netdev_set_config,
|
||
dpif_netdev_queue_to_priority,
|
||
NULL, /* recv */
|
||
NULL, /* recv_wait */
|
||
NULL, /* recv_purge */
|
||
dpif_netdev_register_dp_purge_cb,
|
||
dpif_netdev_register_upcall_cb,
|
||
dpif_netdev_enable_upcall,
|
||
dpif_netdev_disable_upcall,
|
||
dpif_netdev_get_datapath_version,
|
||
dpif_netdev_ct_dump_start,
|
||
dpif_netdev_ct_dump_next,
|
||
dpif_netdev_ct_dump_done,
|
||
dpif_netdev_ct_flush,
|
||
dpif_netdev_meter_get_features,
|
||
dpif_netdev_meter_set,
|
||
dpif_netdev_meter_get,
|
||
dpif_netdev_meter_del,
|
||
};
|
||
|
||
static void
|
||
dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
|
||
const char *argv[], void *aux OVS_UNUSED)
|
||
{
|
||
struct dp_netdev_port *port;
|
||
struct dp_netdev *dp;
|
||
odp_port_t port_no;
|
||
|
||
ovs_mutex_lock(&dp_netdev_mutex);
|
||
dp = shash_find_data(&dp_netdevs, argv[1]);
|
||
if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
|
||
return;
|
||
}
|
||
ovs_refcount_ref(&dp->ref_cnt);
|
||
ovs_mutex_unlock(&dp_netdev_mutex);
|
||
|
||
ovs_mutex_lock(&dp->port_mutex);
|
||
if (get_port_by_name(dp, argv[2], &port)) {
|
||
unixctl_command_reply_error(conn, "unknown port");
|
||
goto exit;
|
||
}
|
||
|
||
port_no = u32_to_odp(atoi(argv[3]));
|
||
if (!port_no || port_no == ODPP_NONE) {
|
||
unixctl_command_reply_error(conn, "bad port number");
|
||
goto exit;
|
||
}
|
||
if (dp_netdev_lookup_port(dp, port_no)) {
|
||
unixctl_command_reply_error(conn, "port number already in use");
|
||
goto exit;
|
||
}
|
||
|
||
/* Remove port. */
|
||
hmap_remove(&dp->ports, &port->node);
|
||
reconfigure_datapath(dp);
|
||
|
||
/* Reinsert with new port number. */
|
||
port->port_no = port_no;
|
||
hmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
|
||
reconfigure_datapath(dp);
|
||
|
||
seq_change(dp->port_seq);
|
||
unixctl_command_reply(conn, NULL);
|
||
|
||
exit:
|
||
ovs_mutex_unlock(&dp->port_mutex);
|
||
dp_netdev_unref(dp);
|
||
}
|
||
|
||
static void
|
||
dpif_dummy_register__(const char *type)
|
||
{
|
||
struct dpif_class *class;
|
||
|
||
class = xmalloc(sizeof *class);
|
||
*class = dpif_netdev_class;
|
||
class->type = xstrdup(type);
|
||
dp_register_provider(class);
|
||
}
|
||
|
||
static void
|
||
dpif_dummy_override(const char *type)
|
||
{
|
||
int error;
|
||
|
||
/*
|
||
* Ignore EAFNOSUPPORT to allow --enable-dummy=system with
|
||
* a userland-only build. It's useful for testsuite.
|
||
*/
|
||
error = dp_unregister_provider(type);
|
||
if (error == 0 || error == EAFNOSUPPORT) {
|
||
dpif_dummy_register__(type);
|
||
}
|
||
}
|
||
|
||
void
|
||
dpif_dummy_register(enum dummy_level level)
|
||
{
|
||
if (level == DUMMY_OVERRIDE_ALL) {
|
||
struct sset types;
|
||
const char *type;
|
||
|
||
sset_init(&types);
|
||
dp_enumerate_types(&types);
|
||
SSET_FOR_EACH (type, &types) {
|
||
dpif_dummy_override(type);
|
||
}
|
||
sset_destroy(&types);
|
||
} else if (level == DUMMY_OVERRIDE_SYSTEM) {
|
||
dpif_dummy_override("system");
|
||
}
|
||
|
||
dpif_dummy_register__("dummy");
|
||
|
||
unixctl_command_register("dpif-dummy/change-port-number",
|
||
"dp port new-number",
|
||
3, 3, dpif_dummy_change_port_number, NULL);
|
||
}
|
||
|
||
/* Datapath Classifier. */
|
||
|
||
/* A set of rules that all have the same fields wildcarded. */
|
||
struct dpcls_subtable {
|
||
/* The fields are only used by writers. */
|
||
struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
|
||
|
||
/* These fields are accessed by readers. */
|
||
struct cmap rules; /* Contains "struct dpcls_rule"s. */
|
||
uint32_t hit_cnt; /* Number of match hits in subtable in current
|
||
optimization interval. */
|
||
struct netdev_flow_key mask; /* Wildcards for fields (const). */
|
||
/* 'mask' must be the last field, additional space is allocated here. */
|
||
};
|
||
|
||
/* Initializes 'cls' as a classifier that initially contains no classification
|
||
* rules. */
|
||
static void
|
||
dpcls_init(struct dpcls *cls)
|
||
{
|
||
cmap_init(&cls->subtables_map);
|
||
pvector_init(&cls->subtables);
|
||
}
|
||
|
||
static void
|
||
dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
|
||
{
|
||
VLOG_DBG("Destroying subtable %p for in_port %d", subtable, cls->in_port);
|
||
pvector_remove(&cls->subtables, subtable);
|
||
cmap_remove(&cls->subtables_map, &subtable->cmap_node,
|
||
subtable->mask.hash);
|
||
cmap_destroy(&subtable->rules);
|
||
ovsrcu_postpone(free, subtable);
|
||
}
|
||
|
||
/* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
|
||
* caller's responsibility.
|
||
* May only be called after all the readers have been terminated. */
|
||
static void
|
||
dpcls_destroy(struct dpcls *cls)
|
||
{
|
||
if (cls) {
|
||
struct dpcls_subtable *subtable;
|
||
|
||
CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
|
||
ovs_assert(cmap_count(&subtable->rules) == 0);
|
||
dpcls_destroy_subtable(cls, subtable);
|
||
}
|
||
cmap_destroy(&cls->subtables_map);
|
||
pvector_destroy(&cls->subtables);
|
||
}
|
||
}
|
||
|
||
static struct dpcls_subtable *
|
||
dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
|
||
{
|
||
struct dpcls_subtable *subtable;
|
||
|
||
/* Need to add one. */
|
||
subtable = xmalloc(sizeof *subtable
|
||
- sizeof subtable->mask.mf + mask->len);
|
||
cmap_init(&subtable->rules);
|
||
subtable->hit_cnt = 0;
|
||
netdev_flow_key_clone(&subtable->mask, mask);
|
||
cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
|
||
/* Add the new subtable at the end of the pvector (with no hits yet) */
|
||
pvector_insert(&cls->subtables, subtable, 0);
|
||
VLOG_DBG("Creating %"PRIuSIZE". subtable %p for in_port %d",
|
||
cmap_count(&cls->subtables_map), subtable, cls->in_port);
|
||
pvector_publish(&cls->subtables);
|
||
|
||
return subtable;
|
||
}
|
||
|
||
static inline struct dpcls_subtable *
|
||
dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
|
||
{
|
||
struct dpcls_subtable *subtable;
|
||
|
||
CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
|
||
&cls->subtables_map) {
|
||
if (netdev_flow_key_equal(&subtable->mask, mask)) {
|
||
return subtable;
|
||
}
|
||
}
|
||
return dpcls_create_subtable(cls, mask);
|
||
}
|
||
|
||
|
||
/* Periodically sort the dpcls subtable vectors according to hit counts */
|
||
static void
|
||
dpcls_sort_subtable_vector(struct dpcls *cls)
|
||
{
|
||
struct pvector *pvec = &cls->subtables;
|
||
struct dpcls_subtable *subtable;
|
||
|
||
PVECTOR_FOR_EACH (subtable, pvec) {
|
||
pvector_change_priority(pvec, subtable, subtable->hit_cnt);
|
||
subtable->hit_cnt = 0;
|
||
}
|
||
pvector_publish(pvec);
|
||
}
|
||
|
||
static inline void
|
||
dp_netdev_pmd_try_optimize(struct dp_netdev_pmd_thread *pmd,
|
||
struct polled_queue *poll_list, int poll_cnt)
|
||
{
|
||
struct dpcls *cls;
|
||
long long int now = time_msec();
|
||
|
||
if (now > pmd->rxq_interval) {
|
||
/* Get the cycles that were used to process each queue and store. */
|
||
for (unsigned i = 0; i < poll_cnt; i++) {
|
||
uint64_t rxq_cyc_curr = dp_netdev_rxq_get_cycles(poll_list[i].rxq,
|
||
RXQ_CYCLES_PROC_CURR);
|
||
dp_netdev_rxq_set_intrvl_cycles(poll_list[i].rxq, rxq_cyc_curr);
|
||
dp_netdev_rxq_set_cycles(poll_list[i].rxq, RXQ_CYCLES_PROC_CURR,
|
||
0);
|
||
}
|
||
/* Start new measuring interval */
|
||
pmd->rxq_interval = now + PMD_RXQ_INTERVAL_LEN;
|
||
}
|
||
|
||
if (now > pmd->next_optimization) {
|
||
/* Try to obtain the flow lock to block out revalidator threads.
|
||
* If not possible, just try next time. */
|
||
if (!ovs_mutex_trylock(&pmd->flow_mutex)) {
|
||
/* Optimize each classifier */
|
||
CMAP_FOR_EACH (cls, node, &pmd->classifiers) {
|
||
dpcls_sort_subtable_vector(cls);
|
||
}
|
||
ovs_mutex_unlock(&pmd->flow_mutex);
|
||
/* Start new measuring interval */
|
||
pmd->next_optimization = now + DPCLS_OPTIMIZATION_INTERVAL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Insert 'rule' into 'cls'. */
|
||
static void
|
||
dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
|
||
const struct netdev_flow_key *mask)
|
||
{
|
||
struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
|
||
|
||
/* Refer to subtable's mask, also for later removal. */
|
||
rule->mask = &subtable->mask;
|
||
cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
|
||
}
|
||
|
||
/* Removes 'rule' from 'cls', also destructing the 'rule'. */
|
||
static void
|
||
dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
|
||
{
|
||
struct dpcls_subtable *subtable;
|
||
|
||
ovs_assert(rule->mask);
|
||
|
||
/* Get subtable from reference in rule->mask. */
|
||
INIT_CONTAINER(subtable, rule->mask, mask);
|
||
if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
|
||
== 0) {
|
||
/* Delete empty subtable. */
|
||
dpcls_destroy_subtable(cls, subtable);
|
||
pvector_publish(&cls->subtables);
|
||
}
|
||
}
|
||
|
||
/* Returns true if 'target' satisfies 'key' in 'mask', that is, if each 1-bit
|
||
* in 'mask' the values in 'key' and 'target' are the same. */
|
||
static inline bool
|
||
dpcls_rule_matches_key(const struct dpcls_rule *rule,
|
||
const struct netdev_flow_key *target)
|
||
{
|
||
const uint64_t *keyp = miniflow_get_values(&rule->flow.mf);
|
||
const uint64_t *maskp = miniflow_get_values(&rule->mask->mf);
|
||
uint64_t value;
|
||
|
||
NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value, target, rule->flow.mf.map) {
|
||
if (OVS_UNLIKELY((value & *maskp++) != *keyp++)) {
|
||
return false;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* For each miniflow in 'keys' performs a classifier lookup writing the result
|
||
* into the corresponding slot in 'rules'. If a particular entry in 'keys' is
|
||
* NULL it is skipped.
|
||
*
|
||
* This function is optimized for use in the userspace datapath and therefore
|
||
* does not implement a lot of features available in the standard
|
||
* classifier_lookup() function. Specifically, it does not implement
|
||
* priorities, instead returning any rule which matches the flow.
|
||
*
|
||
* Returns true if all miniflows found a corresponding rule. */
|
||
static bool
|
||
dpcls_lookup(struct dpcls *cls, const struct netdev_flow_key keys[],
|
||
struct dpcls_rule **rules, const size_t cnt,
|
||
int *num_lookups_p)
|
||
{
|
||
/* The received 'cnt' miniflows are the search-keys that will be processed
|
||
* to find a matching entry into the available subtables.
|
||
* The number of bits in map_type is equal to NETDEV_MAX_BURST. */
|
||
typedef uint32_t map_type;
|
||
#define MAP_BITS (sizeof(map_type) * CHAR_BIT)
|
||
BUILD_ASSERT_DECL(MAP_BITS >= NETDEV_MAX_BURST);
|
||
|
||
struct dpcls_subtable *subtable;
|
||
|
||
map_type keys_map = TYPE_MAXIMUM(map_type); /* Set all bits. */
|
||
map_type found_map;
|
||
uint32_t hashes[MAP_BITS];
|
||
const struct cmap_node *nodes[MAP_BITS];
|
||
|
||
if (cnt != MAP_BITS) {
|
||
keys_map >>= MAP_BITS - cnt; /* Clear extra bits. */
|
||
}
|
||
memset(rules, 0, cnt * sizeof *rules);
|
||
|
||
int lookups_match = 0, subtable_pos = 1;
|
||
|
||
/* The Datapath classifier - aka dpcls - is composed of subtables.
|
||
* Subtables are dynamically created as needed when new rules are inserted.
|
||
* Each subtable collects rules with matches on a specific subset of packet
|
||
* fields as defined by the subtable's mask. We proceed to process every
|
||
* search-key against each subtable, but when a match is found for a
|
||
* search-key, the search for that key can stop because the rules are
|
||
* non-overlapping. */
|
||
PVECTOR_FOR_EACH (subtable, &cls->subtables) {
|
||
int i;
|
||
|
||
/* Compute hashes for the remaining keys. Each search-key is
|
||
* masked with the subtable's mask to avoid hashing the wildcarded
|
||
* bits. */
|
||
ULLONG_FOR_EACH_1(i, keys_map) {
|
||
hashes[i] = netdev_flow_key_hash_in_mask(&keys[i],
|
||
&subtable->mask);
|
||
}
|
||
/* Lookup. */
|
||
found_map = cmap_find_batch(&subtable->rules, keys_map, hashes, nodes);
|
||
/* Check results. When the i-th bit of found_map is set, it means
|
||
* that a set of nodes with a matching hash value was found for the
|
||
* i-th search-key. Due to possible hash collisions we need to check
|
||
* which of the found rules, if any, really matches our masked
|
||
* search-key. */
|
||
ULLONG_FOR_EACH_1(i, found_map) {
|
||
struct dpcls_rule *rule;
|
||
|
||
CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
|
||
if (OVS_LIKELY(dpcls_rule_matches_key(rule, &keys[i]))) {
|
||
rules[i] = rule;
|
||
/* Even at 20 Mpps the 32-bit hit_cnt cannot wrap
|
||
* within one second optimization interval. */
|
||
subtable->hit_cnt++;
|
||
lookups_match += subtable_pos;
|
||
goto next;
|
||
}
|
||
}
|
||
/* None of the found rules was a match. Reset the i-th bit to
|
||
* keep searching this key in the next subtable. */
|
||
ULLONG_SET0(found_map, i); /* Did not match. */
|
||
next:
|
||
; /* Keep Sparse happy. */
|
||
}
|
||
keys_map &= ~found_map; /* Clear the found rules. */
|
||
if (!keys_map) {
|
||
if (num_lookups_p) {
|
||
*num_lookups_p = lookups_match;
|
||
}
|
||
return true; /* All found. */
|
||
}
|
||
subtable_pos++;
|
||
}
|
||
if (num_lookups_p) {
|
||
*num_lookups_p = lookups_match;
|
||
}
|
||
return false; /* Some misses. */
|
||
}
|