2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include "dpif-netdev.h"
24 #include <netinet/in.h>
25 #include <sys/socket.h>
30 #include <sys/ioctl.h>
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
40 #include "fat-rwlock.h"
46 #include "meta-flow.h"
48 #include "netdev-dpdk.h"
49 #include "netdev-vport.h"
51 #include "odp-execute.h"
53 #include "ofp-print.h"
57 #include "packet-dpif.h"
59 #include "poll-loop.h"
66 #include "tnl-arp-cache.h"
71 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
73 #define FLOW_DUMP_MAX_BATCH 50
74 /* Use per thread recirc_depth to prevent recirculation loop. */
75 #define MAX_RECIRC_DEPTH 5
76 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
78 /* Configuration parameters. */
79 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
81 /* Protects against changes to 'dp_netdevs'. */
82 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
84 /* Contains all 'struct dp_netdev's. */
85 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
86 = SHASH_INITIALIZER(&dp_netdevs);
88 static struct vlog_rate_limit upcall_rl = VLOG_RATE_LIMIT_INIT(600, 600);
90 /* Stores a miniflow with inline values */
92 struct netdev_flow_key {
93 uint32_t hash; /* Hash function differs for different users. */
94 uint32_t len; /* Length of the following miniflow (incl. map). */
96 uint32_t buf[FLOW_MAX_PACKET_U32S - MINI_N_INLINE];
99 /* Exact match cache for frequently used flows
101 * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
102 * search its entries for a miniflow that matches exactly the miniflow of the
103 * packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
105 * A cache entry holds a reference to its 'dp_netdev_flow'.
107 * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
108 * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
109 * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
110 * value is the index of a cache entry where the miniflow could be.
116 * Each pmd_thread has its own private exact match cache.
117 * If dp_netdev_input is not called from a pmd thread, a mutex is used.
120 #define EM_FLOW_HASH_SHIFT 10
121 #define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
122 #define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
123 #define EM_FLOW_HASH_SEGS 2
126 struct dp_netdev_flow *flow;
127 struct netdev_flow_key key; /* key.hash used for emc hash value. */
131 struct emc_entry entries[EM_FLOW_HASH_ENTRIES];
134 /* Iterate in the exact match cache through every entry that might contain a
135 * miniflow with hash 'HASH'. */
136 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
137 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
138 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
139 i__ < EM_FLOW_HASH_SEGS; \
140 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
142 /* Simple non-wildcarding single-priority classifier. */
145 struct cmap subtables_map;
146 struct pvector subtables;
149 /* A rule to be inserted to the classifier. */
151 struct cmap_node cmap_node; /* Within struct dpcls_subtable 'rules'. */
152 struct netdev_flow_key *mask; /* Subtable's mask. */
153 struct netdev_flow_key flow; /* Matching key. */
154 /* 'flow' must be the last field, additional space is allocated here. */
157 static void dpcls_init(struct dpcls *);
158 static void dpcls_destroy(struct dpcls *);
159 static void dpcls_insert(struct dpcls *, struct dpcls_rule *,
160 const struct netdev_flow_key *mask);
161 static void dpcls_remove(struct dpcls *, struct dpcls_rule *);
162 static bool dpcls_lookup(const struct dpcls *cls,
163 const struct netdev_flow_key keys[],
164 struct dpcls_rule **rules, size_t cnt);
166 /* Datapath based on the network device interface from netdev.h.
172 * Some members, marked 'const', are immutable. Accessing other members
173 * requires synchronization, as noted in more detail below.
175 * Acquisition order is, from outermost to innermost:
177 * dp_netdev_mutex (global)
182 const struct dpif_class *const class;
183 const char *const name;
185 struct ovs_refcount ref_cnt;
186 atomic_flag destroyed;
190 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
191 * changes to 'cls' must be made while still holding the 'flow_mutex'.
193 struct ovs_mutex flow_mutex;
195 struct cmap flow_table OVS_GUARDED; /* Flow table. */
199 * ovsthread_stats is internally synchronized. */
200 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
204 * Protected by RCU. Take the mutex to add or remove ports. */
205 struct ovs_mutex port_mutex;
207 struct seq *port_seq; /* Incremented whenever a port changes. */
209 /* Protects access to ofproto-dpif-upcall interface during revalidator
210 * thread synchronization. */
211 struct fat_rwlock upcall_rwlock;
212 upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
215 /* Stores all 'struct dp_netdev_pmd_thread's. */
216 struct cmap poll_threads;
218 /* Protects the access of the 'struct dp_netdev_pmd_thread'
219 * instance for non-pmd thread. */
220 struct ovs_mutex non_pmd_mutex;
222 /* Each pmd thread will store its pointer to
223 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
224 ovsthread_key_t per_pmd_key;
226 /* Number of rx queues for each dpdk interface and the cpu mask
227 * for pin of pmd threads. */
230 uint64_t last_tnl_conf_seq;
233 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
237 DP_STAT_HIT, /* Packets that matched in the flow table. */
238 DP_STAT_MISS, /* Packets that did not match. */
239 DP_STAT_LOST, /* Packets not passed up to the client. */
243 /* Contained by struct dp_netdev's 'stats' member. */
244 struct dp_netdev_stats {
245 struct ovs_mutex mutex; /* Protects 'n'. */
247 /* Indexed by DP_STAT_*, protected by 'mutex'. */
248 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
252 /* A port in a netdev-based datapath. */
253 struct dp_netdev_port {
254 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
256 struct netdev *netdev;
257 struct netdev_saved_flags *sf;
258 struct netdev_rxq **rxq;
259 struct ovs_refcount ref_cnt;
260 char *type; /* Port type as requested by user. */
264 /* A flow in dp_netdev's 'flow_table'.
270 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
271 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
276 * The thread safety rules described here for "struct dp_netdev_flow" are
277 * motivated by two goals:
279 * - Prevent threads that read members of "struct dp_netdev_flow" from
280 * reading bad data due to changes by some thread concurrently modifying
283 * - Prevent two threads making changes to members of a given "struct
284 * dp_netdev_flow" from interfering with each other.
290 * A flow 'flow' may be accessed without a risk of being freed during an RCU
291 * grace period. Code that needs to hold onto a flow for a while
292 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
294 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
295 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
298 * Some members, marked 'const', are immutable. Accessing other members
299 * requires synchronization, as noted in more detail below.
301 struct dp_netdev_flow {
304 /* Hash table index by unmasked flow. */
305 const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
306 const struct flow flow; /* Unmasked flow that created this entry. */
308 /* Number of references.
309 * The classifier owns one reference.
310 * Any thread trying to keep a rule from being freed should hold its own
312 struct ovs_refcount ref_cnt;
316 * Reading or writing these members requires 'mutex'. */
317 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
320 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
322 /* Packet classification. */
323 struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
324 /* 'cr' must be the last member. */
327 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
328 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
330 /* Contained by struct dp_netdev_flow's 'stats' member. */
331 struct dp_netdev_flow_stats {
332 struct ovs_mutex mutex; /* Guards all the other members. */
334 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
335 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
336 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
337 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
340 /* A set of datapath actions within a "struct dp_netdev_flow".
346 * A struct dp_netdev_actions 'actions' is protected with RCU. */
347 struct dp_netdev_actions {
348 /* These members are immutable: they do not change during the struct's
350 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
351 unsigned int size; /* Size of 'actions', in bytes. */
354 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
356 struct dp_netdev_actions *dp_netdev_flow_get_actions(
357 const struct dp_netdev_flow *);
358 static void dp_netdev_actions_free(struct dp_netdev_actions *);
360 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
361 * the performance overhead of interrupt processing. Therefore netdev can
362 * not implement rx-wait for these devices. dpif-netdev needs to poll
363 * these device to check for recv buffer. pmd-thread does polling for
364 * devices assigned to itself thread.
366 * DPDK used PMD for accessing NIC.
368 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
369 * I/O of all non-pmd threads. There will be no actual thread created
372 struct dp_netdev_pmd_thread {
373 struct dp_netdev *dp;
374 struct cmap_node node; /* In 'dp->poll_threads'. */
375 /* Per thread exact-match cache. Note, the instance for cpu core
376 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
377 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
378 * instances will only be accessed by its own pmd thread. */
379 struct emc_cache flow_cache;
380 struct latch exit_latch; /* For terminating the pmd thread. */
381 atomic_uint change_seq; /* For reloading pmd ports. */
383 int index; /* Idx of this pmd thread among pmd*/
384 /* threads on same numa node. */
385 int core_id; /* CPU core id of this pmd thread. */
386 int numa_id; /* numa node id of this pmd thread. */
389 #define PMD_INITIAL_SEQ 1
391 /* Interface to netdev-based datapath. */
394 struct dp_netdev *dp;
395 uint64_t last_port_seq;
398 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
399 struct dp_netdev_port **portp);
400 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
401 struct dp_netdev_port **portp);
402 static void dp_netdev_free(struct dp_netdev *)
403 OVS_REQUIRES(dp_netdev_mutex);
404 static void dp_netdev_flow_flush(struct dp_netdev *);
405 static int do_add_port(struct dp_netdev *dp, const char *devname,
406 const char *type, odp_port_t port_no)
407 OVS_REQUIRES(dp->port_mutex);
408 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
409 OVS_REQUIRES(dp->port_mutex);
410 static int dpif_netdev_open(const struct dpif_class *, const char *name,
411 bool create, struct dpif **);
412 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
413 struct dpif_packet **, int c,
415 const struct nlattr *actions,
417 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
418 struct dpif_packet **, int cnt);
420 static void dp_netdev_disable_upcall(struct dp_netdev *);
421 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
422 struct dp_netdev *dp, int index,
423 int core_id, int numa_id);
424 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
425 static struct dp_netdev_pmd_thread *dp_netdev_get_nonpmd(struct dp_netdev *dp);
426 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
427 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
428 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
429 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
431 static void emc_clear_entry(struct emc_entry *ce);
434 emc_cache_init(struct emc_cache *flow_cache)
438 BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
440 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
441 flow_cache->entries[i].flow = NULL;
442 flow_cache->entries[i].key.hash = 0;
443 flow_cache->entries[i].key.len
444 = offsetof(struct miniflow, inline_values);
445 miniflow_initialize(&flow_cache->entries[i].key.mf,
446 flow_cache->entries[i].key.buf);
451 emc_cache_uninit(struct emc_cache *flow_cache)
455 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
456 emc_clear_entry(&flow_cache->entries[i]);
460 static struct dpif_netdev *
461 dpif_netdev_cast(const struct dpif *dpif)
463 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
464 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
467 static struct dp_netdev *
468 get_dp_netdev(const struct dpif *dpif)
470 return dpif_netdev_cast(dpif)->dp;
474 dpif_netdev_enumerate(struct sset *all_dps,
475 const struct dpif_class *dpif_class)
477 struct shash_node *node;
479 ovs_mutex_lock(&dp_netdev_mutex);
480 SHASH_FOR_EACH(node, &dp_netdevs) {
481 struct dp_netdev *dp = node->data;
482 if (dpif_class != dp->class) {
483 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
484 * If the class doesn't match, skip this dpif. */
487 sset_add(all_dps, node->name);
489 ovs_mutex_unlock(&dp_netdev_mutex);
495 dpif_netdev_class_is_dummy(const struct dpif_class *class)
497 return class != &dpif_netdev_class;
501 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
503 return strcmp(type, "internal") ? type
504 : dpif_netdev_class_is_dummy(class) ? "dummy"
509 create_dpif_netdev(struct dp_netdev *dp)
511 uint16_t netflow_id = hash_string(dp->name, 0);
512 struct dpif_netdev *dpif;
514 ovs_refcount_ref(&dp->ref_cnt);
516 dpif = xmalloc(sizeof *dpif);
517 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
519 dpif->last_port_seq = seq_read(dp->port_seq);
524 /* Choose an unused, non-zero port number and return it on success.
525 * Return ODPP_NONE on failure. */
527 choose_port(struct dp_netdev *dp, const char *name)
528 OVS_REQUIRES(dp->port_mutex)
532 if (dp->class != &dpif_netdev_class) {
536 /* If the port name begins with "br", start the number search at
537 * 100 to make writing tests easier. */
538 if (!strncmp(name, "br", 2)) {
542 /* If the port name contains a number, try to assign that port number.
543 * This can make writing unit tests easier because port numbers are
545 for (p = name; *p != '\0'; p++) {
546 if (isdigit((unsigned char) *p)) {
547 port_no = start_no + strtol(p, NULL, 10);
548 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
549 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
550 return u32_to_odp(port_no);
557 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
558 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
559 return u32_to_odp(port_no);
567 create_dp_netdev(const char *name, const struct dpif_class *class,
568 struct dp_netdev **dpp)
569 OVS_REQUIRES(dp_netdev_mutex)
571 struct dp_netdev *dp;
574 dp = xzalloc(sizeof *dp);
575 shash_add(&dp_netdevs, name, dp);
577 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
578 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
579 ovs_refcount_init(&dp->ref_cnt);
580 atomic_flag_clear(&dp->destroyed);
582 ovs_mutex_init(&dp->flow_mutex);
583 dpcls_init(&dp->cls);
584 cmap_init(&dp->flow_table);
586 ovsthread_stats_init(&dp->stats);
588 ovs_mutex_init(&dp->port_mutex);
589 cmap_init(&dp->ports);
590 dp->port_seq = seq_create();
591 fat_rwlock_init(&dp->upcall_rwlock);
593 /* Disable upcalls by default. */
594 dp_netdev_disable_upcall(dp);
595 dp->upcall_aux = NULL;
596 dp->upcall_cb = NULL;
598 cmap_init(&dp->poll_threads);
599 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
600 ovsthread_key_create(&dp->per_pmd_key, NULL);
602 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
603 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
604 dp_netdev_set_nonpmd(dp);
605 dp->n_dpdk_rxqs = NR_QUEUE;
607 ovs_mutex_lock(&dp->port_mutex);
608 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
609 ovs_mutex_unlock(&dp->port_mutex);
615 dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
621 dpif_netdev_open(const struct dpif_class *class, const char *name,
622 bool create, struct dpif **dpifp)
624 struct dp_netdev *dp;
627 ovs_mutex_lock(&dp_netdev_mutex);
628 dp = shash_find_data(&dp_netdevs, name);
630 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
632 error = (dp->class != class ? EINVAL
637 *dpifp = create_dpif_netdev(dp);
640 ovs_mutex_unlock(&dp_netdev_mutex);
646 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
647 OVS_NO_THREAD_SAFETY_ANALYSIS
649 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
650 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
652 /* Before freeing a lock we should release it */
653 fat_rwlock_unlock(&dp->upcall_rwlock);
654 fat_rwlock_destroy(&dp->upcall_rwlock);
657 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
658 * through the 'dp_netdevs' shash while freeing 'dp'. */
660 dp_netdev_free(struct dp_netdev *dp)
661 OVS_REQUIRES(dp_netdev_mutex)
663 struct dp_netdev_port *port;
664 struct dp_netdev_stats *bucket;
667 shash_find_and_delete(&dp_netdevs, dp->name);
669 dp_netdev_destroy_all_pmds(dp);
670 cmap_destroy(&dp->poll_threads);
671 ovs_mutex_destroy(&dp->non_pmd_mutex);
672 ovsthread_key_delete(dp->per_pmd_key);
674 dp_netdev_flow_flush(dp);
675 ovs_mutex_lock(&dp->port_mutex);
676 CMAP_FOR_EACH (port, node, &dp->ports) {
677 do_del_port(dp, port);
679 ovs_mutex_unlock(&dp->port_mutex);
681 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
682 ovs_mutex_destroy(&bucket->mutex);
683 free_cacheline(bucket);
685 ovsthread_stats_destroy(&dp->stats);
687 dpcls_destroy(&dp->cls);
688 cmap_destroy(&dp->flow_table);
689 ovs_mutex_destroy(&dp->flow_mutex);
690 seq_destroy(dp->port_seq);
691 cmap_destroy(&dp->ports);
693 /* Upcalls must be disabled at this point */
694 dp_netdev_destroy_upcall_lock(dp);
697 free(CONST_CAST(char *, dp->name));
702 dp_netdev_unref(struct dp_netdev *dp)
705 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
706 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
707 ovs_mutex_lock(&dp_netdev_mutex);
708 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
711 ovs_mutex_unlock(&dp_netdev_mutex);
716 dpif_netdev_close(struct dpif *dpif)
718 struct dp_netdev *dp = get_dp_netdev(dpif);
725 dpif_netdev_destroy(struct dpif *dpif)
727 struct dp_netdev *dp = get_dp_netdev(dpif);
729 if (!atomic_flag_test_and_set(&dp->destroyed)) {
730 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
731 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
740 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
742 struct dp_netdev *dp = get_dp_netdev(dpif);
743 struct dp_netdev_stats *bucket;
746 stats->n_flows = cmap_count(&dp->flow_table);
748 stats->n_hit = stats->n_missed = stats->n_lost = 0;
749 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
750 ovs_mutex_lock(&bucket->mutex);
751 stats->n_hit += bucket->n[DP_STAT_HIT];
752 stats->n_missed += bucket->n[DP_STAT_MISS];
753 stats->n_lost += bucket->n[DP_STAT_LOST];
754 ovs_mutex_unlock(&bucket->mutex);
756 stats->n_masks = UINT32_MAX;
757 stats->n_mask_hit = UINT64_MAX;
763 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
767 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
770 /* Causes all pmd threads to reload its tx/rx devices.
771 * Must be called after adding/removing ports. */
773 dp_netdev_reload_pmds(struct dp_netdev *dp)
775 struct dp_netdev_pmd_thread *pmd;
777 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
778 dp_netdev_reload_pmd__(pmd);
783 hash_port_no(odp_port_t port_no)
785 return hash_int(odp_to_u32(port_no), 0);
789 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
791 OVS_REQUIRES(dp->port_mutex)
793 struct netdev_saved_flags *sf;
794 struct dp_netdev_port *port;
795 struct netdev *netdev;
796 enum netdev_flags flags;
797 const char *open_type;
801 /* XXX reject devices already in some dp_netdev. */
803 /* Open and validate network device. */
804 open_type = dpif_netdev_port_open_type(dp->class, type);
805 error = netdev_open(devname, open_type, &netdev);
809 /* XXX reject non-Ethernet devices */
811 netdev_get_flags(netdev, &flags);
812 if (flags & NETDEV_LOOPBACK) {
813 VLOG_ERR("%s: cannot add a loopback device", devname);
814 netdev_close(netdev);
818 if (netdev_is_pmd(netdev)) {
819 int n_cores = ovs_numa_get_n_cores();
821 if (n_cores == OVS_CORE_UNSPEC) {
822 VLOG_ERR("%s, cannot get cpu core info", devname);
825 /* There can only be ovs_numa_get_n_cores() pmd threads,
826 * so creates a txq for each. */
827 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
828 if (error && (error != EOPNOTSUPP)) {
829 VLOG_ERR("%s, cannot set multiq", devname);
833 port = xzalloc(sizeof *port);
834 port->port_no = port_no;
835 port->netdev = netdev;
836 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
837 port->type = xstrdup(type);
838 for (i = 0; i < netdev_n_rxq(netdev); i++) {
839 error = netdev_rxq_open(netdev, &port->rxq[i], i);
841 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
842 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
843 devname, ovs_strerror(errno));
844 netdev_close(netdev);
852 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
854 for (i = 0; i < netdev_n_rxq(netdev); i++) {
855 netdev_rxq_close(port->rxq[i]);
857 netdev_close(netdev);
865 if (netdev_is_pmd(netdev)) {
866 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
867 dp_netdev_reload_pmds(dp);
869 ovs_refcount_init(&port->ref_cnt);
871 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
872 seq_change(dp->port_seq);
878 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
879 odp_port_t *port_nop)
881 struct dp_netdev *dp = get_dp_netdev(dpif);
882 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
883 const char *dpif_port;
887 ovs_mutex_lock(&dp->port_mutex);
888 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
889 if (*port_nop != ODPP_NONE) {
891 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
893 port_no = choose_port(dp, dpif_port);
894 error = port_no == ODPP_NONE ? EFBIG : 0;
898 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
900 ovs_mutex_unlock(&dp->port_mutex);
906 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
908 struct dp_netdev *dp = get_dp_netdev(dpif);
911 ovs_mutex_lock(&dp->port_mutex);
912 if (port_no == ODPP_LOCAL) {
915 struct dp_netdev_port *port;
917 error = get_port_by_number(dp, port_no, &port);
919 do_del_port(dp, port);
922 ovs_mutex_unlock(&dp->port_mutex);
928 is_valid_port_number(odp_port_t port_no)
930 return port_no != ODPP_NONE;
933 static struct dp_netdev_port *
934 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
936 struct dp_netdev_port *port;
938 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
939 if (port->port_no == port_no) {
947 get_port_by_number(struct dp_netdev *dp,
948 odp_port_t port_no, struct dp_netdev_port **portp)
950 if (!is_valid_port_number(port_no)) {
954 *portp = dp_netdev_lookup_port(dp, port_no);
955 return *portp ? 0 : ENOENT;
960 port_ref(struct dp_netdev_port *port)
963 ovs_refcount_ref(&port->ref_cnt);
968 port_try_ref(struct dp_netdev_port *port)
971 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
978 port_destroy__(struct dp_netdev_port *port)
980 int n_rxq = netdev_n_rxq(port->netdev);
983 netdev_close(port->netdev);
984 netdev_restore_flags(port->sf);
986 for (i = 0; i < n_rxq; i++) {
987 netdev_rxq_close(port->rxq[i]);
995 port_unref(struct dp_netdev_port *port)
997 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
998 ovsrcu_postpone(port_destroy__, port);
1003 get_port_by_name(struct dp_netdev *dp,
1004 const char *devname, struct dp_netdev_port **portp)
1005 OVS_REQUIRES(dp->port_mutex)
1007 struct dp_netdev_port *port;
1009 CMAP_FOR_EACH (port, node, &dp->ports) {
1010 if (!strcmp(netdev_get_name(port->netdev), devname)) {
1019 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
1021 struct dp_netdev_pmd_thread *pmd;
1024 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1025 if (pmd->numa_id == numa_id) {
1033 /* Returns 'true' if there is a port with pmd netdev and the netdev
1034 * is on numa node 'numa_id'. */
1036 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1038 struct dp_netdev_port *port;
1040 CMAP_FOR_EACH (port, node, &dp->ports) {
1041 if (netdev_is_pmd(port->netdev)
1042 && netdev_get_numa_id(port->netdev) == numa_id) {
1052 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1053 OVS_REQUIRES(dp->port_mutex)
1055 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1056 seq_change(dp->port_seq);
1057 if (netdev_is_pmd(port->netdev)) {
1058 int numa_id = netdev_get_numa_id(port->netdev);
1060 /* If there is no netdev on the numa node, deletes the pmd threads
1061 * for that numa. Else, just reloads the queues. */
1062 if (!has_pmd_port_for_numa(dp, numa_id)) {
1063 dp_netdev_del_pmds_on_numa(dp, numa_id);
1065 dp_netdev_reload_pmds(dp);
1072 answer_port_query(const struct dp_netdev_port *port,
1073 struct dpif_port *dpif_port)
1075 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1076 dpif_port->type = xstrdup(port->type);
1077 dpif_port->port_no = port->port_no;
1081 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1082 struct dpif_port *dpif_port)
1084 struct dp_netdev *dp = get_dp_netdev(dpif);
1085 struct dp_netdev_port *port;
1088 error = get_port_by_number(dp, port_no, &port);
1089 if (!error && dpif_port) {
1090 answer_port_query(port, dpif_port);
1097 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1098 struct dpif_port *dpif_port)
1100 struct dp_netdev *dp = get_dp_netdev(dpif);
1101 struct dp_netdev_port *port;
1104 ovs_mutex_lock(&dp->port_mutex);
1105 error = get_port_by_name(dp, devname, &port);
1106 if (!error && dpif_port) {
1107 answer_port_query(port, dpif_port);
1109 ovs_mutex_unlock(&dp->port_mutex);
1115 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1117 struct dp_netdev_flow_stats *bucket;
1120 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
1121 ovs_mutex_destroy(&bucket->mutex);
1122 free_cacheline(bucket);
1124 ovsthread_stats_destroy(&flow->stats);
1126 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1130 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1132 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1133 ovsrcu_postpone(dp_netdev_flow_free, flow);
1138 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
1139 OVS_REQUIRES(dp->flow_mutex)
1141 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1143 dpcls_remove(&dp->cls, &flow->cr);
1144 cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
1147 dp_netdev_flow_unref(flow);
1151 dp_netdev_flow_flush(struct dp_netdev *dp)
1153 struct dp_netdev_flow *netdev_flow;
1155 ovs_mutex_lock(&dp->flow_mutex);
1156 CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
1157 dp_netdev_remove_flow(dp, netdev_flow);
1159 ovs_mutex_unlock(&dp->flow_mutex);
1163 dpif_netdev_flow_flush(struct dpif *dpif)
1165 struct dp_netdev *dp = get_dp_netdev(dpif);
1167 dp_netdev_flow_flush(dp);
1171 struct dp_netdev_port_state {
1172 struct cmap_position position;
1177 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1179 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1184 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1185 struct dpif_port *dpif_port)
1187 struct dp_netdev_port_state *state = state_;
1188 struct dp_netdev *dp = get_dp_netdev(dpif);
1189 struct cmap_node *node;
1192 node = cmap_next_position(&dp->ports, &state->position);
1194 struct dp_netdev_port *port;
1196 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1199 state->name = xstrdup(netdev_get_name(port->netdev));
1200 dpif_port->name = state->name;
1201 dpif_port->type = port->type;
1202 dpif_port->port_no = port->port_no;
1213 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1215 struct dp_netdev_port_state *state = state_;
1222 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1224 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1225 uint64_t new_port_seq;
1228 new_port_seq = seq_read(dpif->dp->port_seq);
1229 if (dpif->last_port_seq != new_port_seq) {
1230 dpif->last_port_seq = new_port_seq;
1240 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1242 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1244 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1247 static struct dp_netdev_flow *
1248 dp_netdev_flow_cast(const struct dpcls_rule *cr)
1250 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1253 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1255 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1258 /* netdev_flow_key utilities.
1260 * netdev_flow_key is basically a miniflow. We use these functions
1261 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1262 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1264 * - Since we are dealing exclusively with miniflows created by
1265 * miniflow_extract(), if the map is different the miniflow is different.
1266 * Therefore we can be faster by comparing the map and the miniflow in a
1268 * _ netdev_flow_key's miniflow has always inline values.
1269 * - These functions can be inlined by the compiler.
1271 * The following assertions make sure that what we're doing with miniflow is
1274 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1275 == sizeof(uint64_t));
1277 /* Given the number of bits set in the miniflow map, returns the size of the
1278 * 'netdev_flow_key.mf' */
1279 static inline uint32_t
1280 netdev_flow_key_size(uint32_t flow_u32s)
1282 return offsetof(struct miniflow, inline_values) +
1283 MINIFLOW_VALUES_SIZE(flow_u32s);
1287 netdev_flow_key_equal(const struct netdev_flow_key *a,
1288 const struct netdev_flow_key *b)
1290 /* 'b->len' may be not set yet. */
1291 return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
1294 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1295 * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
1296 * generated by miniflow_extract. */
1298 netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
1299 const struct miniflow *mf)
1301 return !memcmp(&key->mf, mf, key->len);
1305 netdev_flow_key_clone(struct netdev_flow_key *dst,
1306 const struct netdev_flow_key *src)
1309 offsetof(struct netdev_flow_key, mf) + src->len);
1314 netdev_flow_key_from_flow(struct netdev_flow_key *dst,
1315 const struct flow *src)
1317 struct ofpbuf packet;
1318 uint64_t buf_stub[512 / 8];
1319 struct pkt_metadata md = pkt_metadata_from_flow(src);
1321 miniflow_initialize(&dst->mf, dst->buf);
1323 ofpbuf_use_stub(&packet, buf_stub, sizeof buf_stub);
1324 flow_compose(&packet, src);
1325 miniflow_extract(&packet, &md, &dst->mf);
1326 ofpbuf_uninit(&packet);
1328 dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
1329 dst->hash = 0; /* Not computed yet. */
1332 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1334 netdev_flow_mask_init(struct netdev_flow_key *mask,
1335 const struct match *match)
1337 const uint32_t *mask_u32 = (const uint32_t *) &match->wc.masks;
1338 uint32_t *dst = mask->mf.inline_values;
1339 uint64_t map, mask_map = 0;
1343 /* Only check masks that make sense for the flow. */
1344 map = flow_wc_map(&match->flow);
1347 uint64_t rm1bit = rightmost_1bit(map);
1348 int i = raw_ctz(map);
1352 *dst++ = mask_u32[i];
1353 hash = hash_add(hash, mask_u32[i]);
1358 mask->mf.values_inline = true;
1359 mask->mf.map = mask_map;
1361 hash = hash_add(hash, mask_map);
1362 hash = hash_add(hash, mask_map >> 32);
1364 n = dst - mask->mf.inline_values;
1366 mask->hash = hash_finish(hash, n * 4);
1367 mask->len = netdev_flow_key_size(n);
1370 /* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
1372 netdev_flow_key_init_masked(struct netdev_flow_key *dst,
1373 const struct flow *flow,
1374 const struct netdev_flow_key *mask)
1376 uint32_t *dst_u32 = dst->mf.inline_values;
1377 const uint32_t *mask_u32 = mask->mf.inline_values;
1381 dst->len = mask->len;
1382 dst->mf.values_inline = true;
1383 dst->mf.map = mask->mf.map;
1385 FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
1386 *dst_u32 = value & *mask_u32++;
1387 hash = hash_add(hash, *dst_u32++);
1389 dst->hash = hash_finish(hash, (dst_u32 - dst->mf.inline_values) * 4);
1392 /* Iterate through all netdev_flow_key u32 values specified by 'MAP' */
1393 #define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
1394 for (struct mf_for_each_in_map_aux aux__ \
1395 = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
1396 mf_get_next_in_map(&aux__, &(VALUE)); \
1399 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1401 static inline uint32_t
1402 netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
1403 const struct netdev_flow_key *mask)
1405 const uint32_t *p = mask->mf.inline_values;
1409 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u32, key, mask->mf.map) {
1410 hash = hash_add(hash, key_u32 & *p++);
1413 return hash_finish(hash, (p - mask->mf.inline_values) * 4);
1417 emc_entry_alive(struct emc_entry *ce)
1419 return ce->flow && !ce->flow->dead;
1423 emc_clear_entry(struct emc_entry *ce)
1426 dp_netdev_flow_unref(ce->flow);
1432 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1433 const struct netdev_flow_key *key)
1435 if (ce->flow != flow) {
1437 dp_netdev_flow_unref(ce->flow);
1440 if (dp_netdev_flow_ref(flow)) {
1447 netdev_flow_key_clone(&ce->key, key);
1452 emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
1453 struct dp_netdev_flow *flow)
1455 struct emc_entry *to_be_replaced = NULL;
1456 struct emc_entry *current_entry;
1458 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1459 if (netdev_flow_key_equal(¤t_entry->key, key)) {
1460 /* We found the entry with the 'mf' miniflow */
1461 emc_change_entry(current_entry, flow, NULL);
1465 /* Replacement policy: put the flow in an empty (not alive) entry, or
1466 * in the first entry where it can be */
1468 || (emc_entry_alive(to_be_replaced)
1469 && !emc_entry_alive(current_entry))
1470 || current_entry->key.hash < to_be_replaced->key.hash) {
1471 to_be_replaced = current_entry;
1474 /* We didn't find the miniflow in the cache.
1475 * The 'to_be_replaced' entry is where the new flow will be stored */
1477 emc_change_entry(to_be_replaced, flow, key);
1480 static inline struct dp_netdev_flow *
1481 emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
1483 struct emc_entry *current_entry;
1485 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1486 if (current_entry->key.hash == key->hash
1487 && emc_entry_alive(current_entry)
1488 && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
1490 /* We found the entry with the 'key->mf' miniflow */
1491 return current_entry->flow;
1498 static struct dp_netdev_flow *
1499 dp_netdev_lookup_flow(const struct dp_netdev *dp,
1500 const struct netdev_flow_key *key)
1502 struct dp_netdev_flow *netdev_flow;
1503 struct dpcls_rule *rule;
1505 dpcls_lookup(&dp->cls, key, &rule, 1);
1506 netdev_flow = dp_netdev_flow_cast(rule);
1511 static struct dp_netdev_flow *
1512 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1514 struct dp_netdev_flow *netdev_flow;
1516 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1518 if (flow_equal(&netdev_flow->flow, flow)) {
1527 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow,
1528 struct dpif_flow_stats *stats)
1530 struct dp_netdev_flow_stats *bucket;
1533 memset(stats, 0, sizeof *stats);
1534 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1535 ovs_mutex_lock(&bucket->mutex);
1536 stats->n_packets += bucket->packet_count;
1537 stats->n_bytes += bucket->byte_count;
1538 stats->used = MAX(stats->used, bucket->used);
1539 stats->tcp_flags |= bucket->tcp_flags;
1540 ovs_mutex_unlock(&bucket->mutex);
1545 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1546 struct ofpbuf *buffer, struct dpif_flow *flow)
1548 struct flow_wildcards wc;
1549 struct dp_netdev_actions *actions;
1551 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1552 odp_flow_key_from_mask(buffer, &wc.masks, &netdev_flow->flow,
1553 odp_to_u32(wc.masks.in_port.odp_port),
1555 flow->mask = ofpbuf_data(buffer);
1556 flow->mask_len = ofpbuf_size(buffer);
1558 actions = dp_netdev_flow_get_actions(netdev_flow);
1559 flow->actions = actions->actions;
1560 flow->actions_len = actions->size;
1562 get_dpif_flow_stats(netdev_flow, &flow->stats);
1566 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1567 const struct nlattr *mask_key,
1568 uint32_t mask_key_len, const struct flow *flow,
1572 enum odp_key_fitness fitness;
1574 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1576 /* This should not happen: it indicates that
1577 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1578 * disagree on the acceptable form of a mask. Log the problem
1579 * as an error, with enough details to enable debugging. */
1580 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1582 if (!VLOG_DROP_ERR(&rl)) {
1586 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1588 VLOG_ERR("internal error parsing flow mask %s (%s)",
1589 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1596 enum mf_field_id id;
1597 /* No mask key, unwildcard everything except fields whose
1598 * prerequisities are not met. */
1599 memset(mask, 0x0, sizeof *mask);
1601 for (id = 0; id < MFF_N_IDS; ++id) {
1602 /* Skip registers and metadata. */
1603 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1604 && id != MFF_METADATA) {
1605 const struct mf_field *mf = mf_from_id(id);
1606 if (mf_are_prereqs_ok(mf, flow)) {
1607 mf_mask_field(mf, mask);
1613 /* Force unwildcard the in_port.
1615 * We need to do this even in the case where we unwildcard "everything"
1616 * above because "everything" only includes the 16-bit OpenFlow port number
1617 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1618 * port number mask->in_port.odp_port. */
1619 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1625 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1630 if (odp_flow_key_to_flow(key, key_len, flow)) {
1631 /* This should not happen: it indicates that odp_flow_key_from_flow()
1632 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1633 * flow. Log the problem as an error, with enough details to enable
1635 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1637 if (!VLOG_DROP_ERR(&rl)) {
1641 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1642 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1649 in_port = flow->in_port.odp_port;
1650 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1658 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1660 struct dp_netdev *dp = get_dp_netdev(dpif);
1661 struct dp_netdev_flow *netdev_flow;
1665 error = dpif_netdev_flow_from_nlattrs(get->key, get->key_len, &key);
1670 netdev_flow = dp_netdev_find_flow(dp, &key);
1673 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->flow);
1681 static struct dp_netdev_flow *
1682 dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
1683 const struct nlattr *actions, size_t actions_len)
1684 OVS_REQUIRES(dp->flow_mutex)
1686 struct dp_netdev_flow *flow;
1687 struct netdev_flow_key mask;
1689 netdev_flow_mask_init(&mask, match);
1690 /* Make sure wc does not have metadata. */
1691 ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
1693 /* Do not allocate extra space. */
1694 flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
1696 *CONST_CAST(struct flow *, &flow->flow) = match->flow;
1697 ovs_refcount_init(&flow->ref_cnt);
1698 ovsthread_stats_init(&flow->stats);
1699 ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
1701 cmap_insert(&dp->flow_table,
1702 CONST_CAST(struct cmap_node *, &flow->node),
1703 flow_hash(&flow->flow, 0));
1704 netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
1705 dpcls_insert(&dp->cls, &flow->cr, &mask);
1707 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1709 struct ds ds = DS_EMPTY_INITIALIZER;
1711 match.flow = flow->flow;
1712 miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
1714 ds_put_cstr(&ds, "flow_add: ");
1715 match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
1716 ds_put_cstr(&ds, ", actions:");
1717 format_odp_actions(&ds, actions, actions_len);
1719 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
1728 clear_stats(struct dp_netdev_flow *netdev_flow)
1730 struct dp_netdev_flow_stats *bucket;
1733 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1734 ovs_mutex_lock(&bucket->mutex);
1736 bucket->packet_count = 0;
1737 bucket->byte_count = 0;
1738 bucket->tcp_flags = 0;
1739 ovs_mutex_unlock(&bucket->mutex);
1744 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1746 struct dp_netdev *dp = get_dp_netdev(dpif);
1747 struct dp_netdev_flow *netdev_flow;
1748 struct netdev_flow_key key;
1752 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
1756 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1757 put->mask, put->mask_len,
1758 &match.flow, &match.wc.masks);
1763 /* Must produce a netdev_flow_key for lookup.
1764 * This interface is no longer performance critical, since it is not used
1765 * for upcall processing any more. */
1766 netdev_flow_key_from_flow(&key, &match.flow);
1768 ovs_mutex_lock(&dp->flow_mutex);
1769 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1771 if (put->flags & DPIF_FP_CREATE) {
1772 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1774 memset(put->stats, 0, sizeof *put->stats);
1776 dp_netdev_flow_add(dp, &match, put->actions, put->actions_len);
1785 if (put->flags & DPIF_FP_MODIFY
1786 && flow_equal(&match.flow, &netdev_flow->flow)) {
1787 struct dp_netdev_actions *new_actions;
1788 struct dp_netdev_actions *old_actions;
1790 new_actions = dp_netdev_actions_create(put->actions,
1793 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1794 ovsrcu_set(&netdev_flow->actions, new_actions);
1797 get_dpif_flow_stats(netdev_flow, put->stats);
1799 if (put->flags & DPIF_FP_ZERO_STATS) {
1800 clear_stats(netdev_flow);
1803 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1804 } else if (put->flags & DPIF_FP_CREATE) {
1807 /* Overlapping flow. */
1811 ovs_mutex_unlock(&dp->flow_mutex);
1817 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1819 struct dp_netdev *dp = get_dp_netdev(dpif);
1820 struct dp_netdev_flow *netdev_flow;
1824 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1829 ovs_mutex_lock(&dp->flow_mutex);
1830 netdev_flow = dp_netdev_find_flow(dp, &key);
1833 get_dpif_flow_stats(netdev_flow, del->stats);
1835 dp_netdev_remove_flow(dp, netdev_flow);
1839 ovs_mutex_unlock(&dp->flow_mutex);
1844 struct dpif_netdev_flow_dump {
1845 struct dpif_flow_dump up;
1846 struct cmap_position pos;
1848 struct ovs_mutex mutex;
1851 static struct dpif_netdev_flow_dump *
1852 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1854 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1857 static struct dpif_flow_dump *
1858 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1860 struct dpif_netdev_flow_dump *dump;
1862 dump = xmalloc(sizeof *dump);
1863 dpif_flow_dump_init(&dump->up, dpif_);
1864 memset(&dump->pos, 0, sizeof dump->pos);
1866 ovs_mutex_init(&dump->mutex);
1872 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1874 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1876 ovs_mutex_destroy(&dump->mutex);
1881 struct dpif_netdev_flow_dump_thread {
1882 struct dpif_flow_dump_thread up;
1883 struct dpif_netdev_flow_dump *dump;
1884 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1885 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1888 static struct dpif_netdev_flow_dump_thread *
1889 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1891 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1894 static struct dpif_flow_dump_thread *
1895 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1897 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1898 struct dpif_netdev_flow_dump_thread *thread;
1900 thread = xmalloc(sizeof *thread);
1901 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1902 thread->dump = dump;
1907 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1909 struct dpif_netdev_flow_dump_thread *thread
1910 = dpif_netdev_flow_dump_thread_cast(thread_);
1916 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1917 struct dpif_flow *flows, int max_flows)
1919 struct dpif_netdev_flow_dump_thread *thread
1920 = dpif_netdev_flow_dump_thread_cast(thread_);
1921 struct dpif_netdev_flow_dump *dump = thread->dump;
1922 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1923 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1924 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1928 ovs_mutex_lock(&dump->mutex);
1929 if (!dump->status) {
1930 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1932 struct cmap_node *node;
1934 node = cmap_next_position(&dp->flow_table, &dump->pos);
1939 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
1943 ovs_mutex_unlock(&dump->mutex);
1945 for (i = 0; i < n_flows; i++) {
1946 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
1947 struct odputil_keybuf *keybuf = &thread->keybuf[i];
1948 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
1949 struct dpif_flow *f = &flows[i];
1950 struct dp_netdev_actions *dp_actions;
1951 struct flow_wildcards wc;
1954 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1957 ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
1958 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1959 netdev_flow->flow.in_port.odp_port, true);
1960 f->key = ofpbuf_data(&buf);
1961 f->key_len = ofpbuf_size(&buf);
1964 ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
1965 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1966 odp_to_u32(wc.masks.in_port.odp_port),
1968 f->mask = ofpbuf_data(&buf);
1969 f->mask_len = ofpbuf_size(&buf);
1972 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1973 f->actions = dp_actions->actions;
1974 f->actions_len = dp_actions->size;
1977 get_dpif_flow_stats(netdev_flow, &f->stats);
1984 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1985 OVS_NO_THREAD_SAFETY_ANALYSIS
1987 struct dp_netdev *dp = get_dp_netdev(dpif);
1988 struct dp_netdev_pmd_thread *pmd;
1989 struct dpif_packet packet, *pp;
1991 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1992 ofpbuf_size(execute->packet) > UINT16_MAX) {
1996 packet.ofpbuf = *execute->packet;
1997 packet.md = execute->md;
2000 /* Tries finding the 'pmd'. If NULL is returned, that means
2001 * the current thread is a non-pmd thread and should use
2002 * dp_netdev_get_nonpmd(). */
2003 pmd = ovsthread_getspecific(dp->per_pmd_key);
2005 pmd = dp_netdev_get_nonpmd(dp);
2008 /* If the current thread is non-pmd thread, acquires
2009 * the 'non_pmd_mutex'. */
2010 if (pmd->core_id == NON_PMD_CORE_ID) {
2011 ovs_mutex_lock(&dp->non_pmd_mutex);
2013 dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
2014 execute->actions_len);
2015 if (pmd->core_id == NON_PMD_CORE_ID) {
2016 ovs_mutex_unlock(&dp->non_pmd_mutex);
2019 /* Even though may_steal is set to false, some actions could modify or
2020 * reallocate the ofpbuf memory. We need to pass those changes to the
2022 *execute->packet = packet.ofpbuf;
2023 execute->md = packet.md;
2028 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
2032 for (i = 0; i < n_ops; i++) {
2033 struct dpif_op *op = ops[i];
2036 case DPIF_OP_FLOW_PUT:
2037 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
2040 case DPIF_OP_FLOW_DEL:
2041 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
2044 case DPIF_OP_EXECUTE:
2045 op->error = dpif_netdev_execute(dpif, &op->u.execute);
2048 case DPIF_OP_FLOW_GET:
2049 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
2055 /* Returns true if the configuration for rx queues or cpu mask
2058 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
2060 if (dp->n_dpdk_rxqs != rxqs) {
2063 if (dp->pmd_cmask != NULL && cmask != NULL) {
2064 return strcmp(dp->pmd_cmask, cmask);
2066 return (dp->pmd_cmask != NULL || cmask != NULL);
2071 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2073 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
2075 struct dp_netdev *dp = get_dp_netdev(dpif);
2077 if (pmd_config_changed(dp, n_rxqs, cmask)) {
2078 struct dp_netdev_port *port;
2080 dp_netdev_destroy_all_pmds(dp);
2082 CMAP_FOR_EACH (port, node, &dp->ports) {
2083 if (netdev_is_pmd(port->netdev)) {
2086 /* Closes the existing 'rxq's. */
2087 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2088 netdev_rxq_close(port->rxq[i]);
2089 port->rxq[i] = NULL;
2092 /* Sets the new rx queue config. */
2093 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
2095 if (err && (err != EOPNOTSUPP)) {
2096 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2097 " %u", netdev_get_name(port->netdev),
2102 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2103 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
2104 * netdev_n_rxq(port->netdev));
2105 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2106 netdev_rxq_open(port->netdev, &port->rxq[i], i);
2110 dp->n_dpdk_rxqs = n_rxqs;
2112 /* Reconfigures the cpu mask. */
2113 ovs_numa_set_cpu_mask(cmask);
2114 free(dp->pmd_cmask);
2115 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
2117 /* Restores the non-pmd. */
2118 dp_netdev_set_nonpmd(dp);
2119 /* Restores all pmd threads. */
2120 dp_netdev_reset_pmd_threads(dp);
2127 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2128 uint32_t queue_id, uint32_t *priority)
2130 *priority = queue_id;
2135 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2136 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2138 struct dp_netdev_actions *
2139 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2141 struct dp_netdev_actions *netdev_actions;
2143 netdev_actions = xmalloc(sizeof *netdev_actions);
2144 netdev_actions->actions = xmemdup(actions, size);
2145 netdev_actions->size = size;
2147 return netdev_actions;
2150 struct dp_netdev_actions *
2151 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2153 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2157 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2159 free(actions->actions);
2165 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2166 struct dp_netdev_port *port,
2167 struct netdev_rxq *rxq)
2169 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2172 error = netdev_rxq_recv(rxq, packets, &cnt);
2176 *recirc_depth_get() = 0;
2178 /* XXX: initialize md in netdev implementation. */
2179 for (i = 0; i < cnt; i++) {
2180 packets[i]->md = PKT_METADATA_INITIALIZER(port->port_no);
2182 dp_netdev_input(pmd, packets, cnt);
2183 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2184 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2186 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2187 netdev_get_name(port->netdev), ovs_strerror(error));
2191 /* Return true if needs to revalidate datapath flows. */
2193 dpif_netdev_run(struct dpif *dpif)
2195 struct dp_netdev_port *port;
2196 struct dp_netdev *dp = get_dp_netdev(dpif);
2197 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_nonpmd(dp);
2198 uint64_t new_tnl_seq;
2200 ovs_mutex_lock(&dp->non_pmd_mutex);
2201 CMAP_FOR_EACH (port, node, &dp->ports) {
2202 if (!netdev_is_pmd(port->netdev)) {
2205 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2206 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2210 ovs_mutex_unlock(&dp->non_pmd_mutex);
2211 tnl_arp_cache_run();
2212 new_tnl_seq = seq_read(tnl_conf_seq);
2214 if (dp->last_tnl_conf_seq != new_tnl_seq) {
2215 dp->last_tnl_conf_seq = new_tnl_seq;
2222 dpif_netdev_wait(struct dpif *dpif)
2224 struct dp_netdev_port *port;
2225 struct dp_netdev *dp = get_dp_netdev(dpif);
2227 ovs_mutex_lock(&dp_netdev_mutex);
2228 CMAP_FOR_EACH (port, node, &dp->ports) {
2229 if (!netdev_is_pmd(port->netdev)) {
2232 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2233 netdev_rxq_wait(port->rxq[i]);
2237 ovs_mutex_unlock(&dp_netdev_mutex);
2238 seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
2242 struct dp_netdev_port *port;
2243 struct netdev_rxq *rx;
2247 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2248 struct rxq_poll **ppoll_list, int poll_cnt)
2250 struct rxq_poll *poll_list = *ppoll_list;
2251 struct dp_netdev_port *port;
2252 int n_pmds_on_numa, index, i;
2254 /* Simple scheduler for netdev rx polling. */
2255 for (i = 0; i < poll_cnt; i++) {
2256 port_unref(poll_list[i].port);
2260 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2263 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2264 /* Calls port_try_ref() to prevent the main thread
2265 * from deleting the port. */
2266 if (port_try_ref(port)) {
2267 if (netdev_is_pmd(port->netdev)
2268 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2271 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2272 if ((index % n_pmds_on_numa) == pmd->index) {
2273 poll_list = xrealloc(poll_list,
2274 sizeof *poll_list * (poll_cnt + 1));
2277 poll_list[poll_cnt].port = port;
2278 poll_list[poll_cnt].rx = port->rxq[i];
2284 /* Unrefs the port_try_ref(). */
2289 *ppoll_list = poll_list;
2294 pmd_thread_main(void *f_)
2296 struct dp_netdev_pmd_thread *pmd = f_;
2297 unsigned int lc = 0;
2298 struct rxq_poll *poll_list;
2299 unsigned int port_seq = PMD_INITIAL_SEQ;
2306 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2307 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2308 pmd_thread_setaffinity_cpu(pmd->core_id);
2310 emc_cache_init(&pmd->flow_cache);
2311 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2316 for (i = 0; i < poll_cnt; i++) {
2317 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2327 atomic_read_relaxed(&pmd->change_seq, &seq);
2328 if (seq != port_seq) {
2335 emc_cache_uninit(&pmd->flow_cache);
2337 if (!latch_is_set(&pmd->exit_latch)){
2341 for (i = 0; i < poll_cnt; i++) {
2342 port_unref(poll_list[i].port);
2350 dp_netdev_disable_upcall(struct dp_netdev *dp)
2351 OVS_ACQUIRES(dp->upcall_rwlock)
2353 fat_rwlock_wrlock(&dp->upcall_rwlock);
2357 dpif_netdev_disable_upcall(struct dpif *dpif)
2358 OVS_NO_THREAD_SAFETY_ANALYSIS
2360 struct dp_netdev *dp = get_dp_netdev(dpif);
2361 dp_netdev_disable_upcall(dp);
2365 dp_netdev_enable_upcall(struct dp_netdev *dp)
2366 OVS_RELEASES(dp->upcall_rwlock)
2368 fat_rwlock_unlock(&dp->upcall_rwlock);
2372 dpif_netdev_enable_upcall(struct dpif *dpif)
2373 OVS_NO_THREAD_SAFETY_ANALYSIS
2375 struct dp_netdev *dp = get_dp_netdev(dpif);
2376 dp_netdev_enable_upcall(dp);
2379 /* Returns the pointer to the dp_netdev_pmd_thread for non-pmd threads. */
2380 static struct dp_netdev_pmd_thread *
2381 dp_netdev_get_nonpmd(struct dp_netdev *dp)
2383 struct dp_netdev_pmd_thread *pmd;
2384 const struct cmap_node *pnode;
2386 pnode = cmap_find(&dp->poll_threads, hash_int(NON_PMD_CORE_ID, 0));
2388 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2393 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2395 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2397 struct dp_netdev_pmd_thread *non_pmd;
2399 non_pmd = xzalloc(sizeof *non_pmd);
2400 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2404 /* Configures the 'pmd' based on the input argument. */
2406 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2407 int index, int core_id, int numa_id)
2411 pmd->core_id = core_id;
2412 pmd->numa_id = numa_id;
2413 latch_init(&pmd->exit_latch);
2414 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2415 /* init the 'flow_cache' since there is no
2416 * actual thread created for NON_PMD_CORE_ID. */
2417 if (core_id == NON_PMD_CORE_ID) {
2418 emc_cache_init(&pmd->flow_cache);
2420 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2421 hash_int(core_id, 0));
2424 /* Stops the pmd thread, removes it from the 'dp->poll_threads'
2425 * and destroys the struct. */
2427 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2429 /* Uninit the 'flow_cache' since there is
2430 * no actual thread uninit it. */
2431 if (pmd->core_id == NON_PMD_CORE_ID) {
2432 emc_cache_uninit(&pmd->flow_cache);
2434 latch_set(&pmd->exit_latch);
2435 dp_netdev_reload_pmd__(pmd);
2436 ovs_numa_unpin_core(pmd->core_id);
2437 xpthread_join(pmd->thread, NULL);
2439 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2440 latch_destroy(&pmd->exit_latch);
2444 /* Destroys all pmd threads. */
2446 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2448 struct dp_netdev_pmd_thread *pmd;
2450 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2451 dp_netdev_del_pmd(pmd);
2455 /* Deletes all pmd threads on numa node 'numa_id'. */
2457 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2459 struct dp_netdev_pmd_thread *pmd;
2461 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2462 if (pmd->numa_id == numa_id) {
2463 dp_netdev_del_pmd(pmd);
2468 /* Checks the numa node id of 'netdev' and starts pmd threads for
2471 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2475 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2476 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2477 "invalid", numa_id);
2481 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2483 /* If there are already pmd threads created for the numa node
2484 * in which 'netdev' is on, do nothing. Else, creates the
2485 * pmd threads for the numa node. */
2487 int can_have, n_unpinned, i;
2489 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2491 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2492 "cores on numa node");
2496 /* If cpu mask is specified, uses all unpinned cores, otherwise
2497 * tries creating NR_PMD_THREADS pmd threads. */
2498 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2499 for (i = 0; i < can_have; i++) {
2500 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2501 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2503 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2504 /* Each thread will distribute all devices rx-queues among
2506 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2508 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2514 dp_netdev_flow_stats_new_cb(void)
2516 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2517 ovs_mutex_init(&bucket->mutex);
2521 /* Called after pmd threads config change. Restarts pmd threads with
2522 * new configuration. */
2524 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2526 struct dp_netdev_port *port;
2528 CMAP_FOR_EACH (port, node, &dp->ports) {
2529 if (netdev_is_pmd(port->netdev)) {
2530 int numa_id = netdev_get_numa_id(port->netdev);
2532 dp_netdev_set_pmds_on_numa(dp, numa_id);
2538 dpif_netdev_get_datapath_version(void)
2540 return xstrdup("<built-in>");
2544 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
2548 long long int now = time_msec();
2549 struct dp_netdev_flow_stats *bucket;
2551 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
2552 dp_netdev_flow_stats_new_cb);
2554 ovs_mutex_lock(&bucket->mutex);
2555 bucket->used = MAX(now, bucket->used);
2556 bucket->packet_count += cnt;
2557 bucket->byte_count += size;
2558 bucket->tcp_flags |= tcp_flags;
2559 ovs_mutex_unlock(&bucket->mutex);
2563 dp_netdev_stats_new_cb(void)
2565 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2566 ovs_mutex_init(&bucket->mutex);
2571 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
2573 struct dp_netdev_stats *bucket;
2575 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2576 ovs_mutex_lock(&bucket->mutex);
2577 bucket->n[type] += cnt;
2578 ovs_mutex_unlock(&bucket->mutex);
2582 dp_netdev_upcall(struct dp_netdev *dp, struct dpif_packet *packet_,
2583 struct flow *flow, struct flow_wildcards *wc,
2584 enum dpif_upcall_type type, const struct nlattr *userdata,
2585 struct ofpbuf *actions, struct ofpbuf *put_actions)
2587 struct ofpbuf *packet = &packet_->ofpbuf;
2589 if (type == DPIF_UC_MISS) {
2590 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2593 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2597 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2598 struct ds ds = DS_EMPTY_INITIALIZER;
2602 ofpbuf_init(&key, 0);
2603 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2606 packet_str = ofp_packet_to_string(ofpbuf_data(packet),
2607 ofpbuf_size(packet));
2609 odp_flow_key_format(ofpbuf_data(&key), ofpbuf_size(&key), &ds);
2611 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
2612 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
2614 ofpbuf_uninit(&key);
2619 return dp->upcall_cb(packet, flow, type, userdata, actions, wc,
2620 put_actions, dp->upcall_aux);
2623 static inline uint32_t
2624 dpif_netdev_packet_get_dp_hash(struct dpif_packet *packet,
2625 const struct miniflow *mf)
2629 hash = dpif_packet_get_dp_hash(packet);
2630 if (OVS_UNLIKELY(!hash)) {
2631 hash = miniflow_hash_5tuple(mf, 0);
2632 dpif_packet_set_dp_hash(packet, hash);
2637 struct packet_batch {
2638 unsigned int packet_count;
2639 unsigned int byte_count;
2642 struct dp_netdev_flow *flow;
2644 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2648 packet_batch_update(struct packet_batch *batch, struct dpif_packet *packet,
2649 const struct miniflow *mf)
2651 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2652 batch->packets[batch->packet_count++] = packet;
2653 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2657 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
2661 batch->packet_count = 0;
2662 batch->byte_count = 0;
2663 batch->tcp_flags = 0;
2667 packet_batch_execute(struct packet_batch *batch,
2668 struct dp_netdev_pmd_thread *pmd)
2670 struct dp_netdev_actions *actions;
2671 struct dp_netdev_flow *flow = batch->flow;
2673 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2676 actions = dp_netdev_flow_get_actions(flow);
2678 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
2679 actions->actions, actions->size);
2681 dp_netdev_count_packet(pmd->dp, DP_STAT_HIT, batch->packet_count);
2685 dp_netdev_queue_batches(struct dpif_packet *pkt,
2686 struct dp_netdev_flow *flow, const struct miniflow *mf,
2687 struct packet_batch *batches, size_t *n_batches,
2690 struct packet_batch *batch = NULL;
2693 if (OVS_UNLIKELY(!flow)) {
2696 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2697 * assumption that the number of distinct flows (and therefore the
2698 * number of distinct batches) is quite small. If this turns out not
2699 * to be the case, it may make sense to pre sort based on the
2700 * netdev_flow pointer. That done we can get the appropriate batching
2701 * in O(n * log(n)) instead. */
2702 for (j = *n_batches - 1; j >= 0; j--) {
2703 if (batches[j].flow == flow) {
2704 batch = &batches[j];
2705 packet_batch_update(batch, pkt, mf);
2709 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
2713 batch = &batches[(*n_batches)++];
2714 packet_batch_init(batch, flow);
2715 packet_batch_update(batch, pkt, mf);
2720 dpif_packet_swap(struct dpif_packet **a, struct dpif_packet **b)
2722 struct dpif_packet *tmp = *a;
2727 /* Try to process all ('cnt') the 'packets' using only the exact match cache
2728 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
2729 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
2730 * and the packet pointer is moved at the beginning of the 'packets' array.
2732 * The function returns the number of packets that needs to be processed in the
2733 * 'packets' array (they have been moved to the beginning of the vector).
2735 static inline size_t
2736 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dpif_packet **packets,
2737 size_t cnt, struct netdev_flow_key *keys)
2739 struct netdev_flow_key key;
2740 struct packet_batch batches[4];
2741 struct emc_cache *flow_cache = &pmd->flow_cache;
2742 size_t n_batches, i;
2743 size_t notfound_cnt = 0;
2746 miniflow_initialize(&key.mf, key.buf);
2747 for (i = 0; i < cnt; i++) {
2748 struct dp_netdev_flow *flow;
2750 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2751 dpif_packet_delete(packets[i]);
2755 miniflow_extract(&packets[i]->ofpbuf, &packets[i]->md, &key.mf);
2756 key.len = 0; /* Not computed yet. */
2757 key.hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.mf);
2759 flow = emc_lookup(flow_cache, &key);
2760 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], flow, &key.mf,
2761 batches, &n_batches,
2762 ARRAY_SIZE(batches)))) {
2763 if (i != notfound_cnt) {
2764 dpif_packet_swap(&packets[i], &packets[notfound_cnt]);
2767 keys[notfound_cnt++] = key;
2771 for (i = 0; i < n_batches; i++) {
2772 packet_batch_execute(&batches[i], pmd);
2775 return notfound_cnt;
2779 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
2780 struct dpif_packet **packets, size_t cnt,
2781 struct netdev_flow_key *keys)
2783 #if !defined(__CHECKER__) && !defined(_WIN32)
2784 const size_t PKT_ARRAY_SIZE = cnt;
2786 /* Sparse or MSVC doesn't like variable length array. */
2787 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2789 struct packet_batch batches[PKT_ARRAY_SIZE];
2790 struct dpcls_rule *rules[PKT_ARRAY_SIZE];
2791 struct dp_netdev *dp = pmd->dp;
2792 struct emc_cache *flow_cache = &pmd->flow_cache;
2793 size_t n_batches, i;
2796 for (i = 0; i < cnt; i++) {
2797 /* Key length is needed in all the cases, hash computed on demand. */
2798 keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
2800 any_miss = !dpcls_lookup(&dp->cls, keys, rules, cnt);
2801 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2802 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
2803 struct ofpbuf actions, put_actions;
2805 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
2806 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
2808 for (i = 0; i < cnt; i++) {
2809 struct dp_netdev_flow *netdev_flow;
2810 struct ofpbuf *add_actions;
2814 if (OVS_LIKELY(rules[i])) {
2818 /* It's possible that an earlier slow path execution installed
2819 * a rule covering this flow. In this case, it's a lot cheaper
2820 * to catch it here than execute a miss. */
2821 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2823 rules[i] = &netdev_flow->cr;
2827 miniflow_expand(&keys[i].mf, &match.flow);
2829 ofpbuf_clear(&actions);
2830 ofpbuf_clear(&put_actions);
2832 error = dp_netdev_upcall(dp, packets[i], &match.flow, &match.wc,
2833 DPIF_UC_MISS, NULL, &actions,
2835 if (OVS_UNLIKELY(error && error != ENOSPC)) {
2839 /* We can't allow the packet batching in the next loop to execute
2840 * the actions. Otherwise, if there are any slow path actions,
2841 * we'll send the packet up twice. */
2842 dp_netdev_execute_actions(pmd, &packets[i], 1, true,
2843 ofpbuf_data(&actions),
2844 ofpbuf_size(&actions));
2846 add_actions = ofpbuf_size(&put_actions)
2850 if (OVS_LIKELY(error != ENOSPC)) {
2851 /* XXX: There's a race window where a flow covering this packet
2852 * could have already been installed since we last did the flow
2853 * lookup before upcall. This could be solved by moving the
2854 * mutex lock outside the loop, but that's an awful long time
2855 * to be locking everyone out of making flow installs. If we
2856 * move to a per-core classifier, it would be reasonable. */
2857 ovs_mutex_lock(&dp->flow_mutex);
2858 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2859 if (OVS_LIKELY(!netdev_flow)) {
2860 netdev_flow = dp_netdev_flow_add(dp, &match,
2861 ofpbuf_data(add_actions),
2862 ofpbuf_size(add_actions));
2864 ovs_mutex_unlock(&dp->flow_mutex);
2866 emc_insert(flow_cache, &keys[i], netdev_flow);
2870 ofpbuf_uninit(&actions);
2871 ofpbuf_uninit(&put_actions);
2872 fat_rwlock_unlock(&dp->upcall_rwlock);
2873 } else if (OVS_UNLIKELY(any_miss)) {
2874 int dropped_cnt = 0;
2876 for (i = 0; i < cnt; i++) {
2877 if (OVS_UNLIKELY(!rules[i])) {
2878 dpif_packet_delete(packets[i]);
2883 dp_netdev_count_packet(dp, DP_STAT_LOST, dropped_cnt);
2887 for (i = 0; i < cnt; i++) {
2888 struct dpif_packet *packet = packets[i];
2889 struct dp_netdev_flow *flow;
2891 if (OVS_UNLIKELY(!rules[i])) {
2895 flow = dp_netdev_flow_cast(rules[i]);
2897 emc_insert(flow_cache, &keys[i], flow);
2898 dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches,
2899 &n_batches, ARRAY_SIZE(batches));
2902 for (i = 0; i < n_batches; i++) {
2903 packet_batch_execute(&batches[i], pmd);
2908 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
2909 struct dpif_packet **packets, int cnt)
2911 #if !defined(__CHECKER__) && !defined(_WIN32)
2912 const size_t PKT_ARRAY_SIZE = cnt;
2914 /* Sparse or MSVC doesn't like variable length array. */
2915 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2917 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
2920 newcnt = emc_processing(pmd, packets, cnt, keys);
2921 if (OVS_UNLIKELY(newcnt)) {
2922 fast_path_processing(pmd, packets, newcnt, keys);
2926 struct dp_netdev_execute_aux {
2927 struct dp_netdev_pmd_thread *pmd;
2931 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
2934 struct dp_netdev *dp = get_dp_netdev(dpif);
2935 dp->upcall_aux = aux;
2940 dp_netdev_drop_packets(struct dpif_packet ** packets, int cnt, bool may_steal)
2945 for (i = 0; i < cnt; i++) {
2946 dpif_packet_delete(packets[i]);
2952 push_tnl_action(const struct dp_netdev *dp,
2953 const struct nlattr *attr,
2954 struct dpif_packet **packets, int cnt)
2956 struct dp_netdev_port *tun_port;
2957 const struct ovs_action_push_tnl *data;
2959 data = nl_attr_get(attr);
2961 tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
2965 netdev_push_header(tun_port->netdev, packets, cnt, data);
2971 dp_netdev_clone_pkt_batch(struct dpif_packet **tnl_pkt,
2972 struct dpif_packet **packets, int cnt)
2976 for (i = 0; i < cnt; i++) {
2977 tnl_pkt[i] = dpif_packet_clone(packets[i]);
2982 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
2983 const struct nlattr *a, bool may_steal)
2984 OVS_NO_THREAD_SAFETY_ANALYSIS
2986 struct dp_netdev_execute_aux *aux = aux_;
2987 uint32_t *depth = recirc_depth_get();
2988 struct dp_netdev_pmd_thread *pmd= aux->pmd;
2989 struct dp_netdev *dp= pmd->dp;
2990 int type = nl_attr_type(a);
2991 struct dp_netdev_port *p;
2994 switch ((enum ovs_action_attr)type) {
2995 case OVS_ACTION_ATTR_OUTPUT:
2996 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
2997 if (OVS_LIKELY(p)) {
2998 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
3003 case OVS_ACTION_ATTR_TUNNEL_PUSH:
3004 if (*depth < MAX_RECIRC_DEPTH) {
3005 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3009 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3013 err = push_tnl_action(dp, a, packets, cnt);
3016 dp_netdev_input(pmd, packets, cnt);
3019 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3025 case OVS_ACTION_ATTR_TUNNEL_POP:
3026 if (*depth < MAX_RECIRC_DEPTH) {
3027 odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
3029 p = dp_netdev_lookup_port(dp, portno);
3031 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3035 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3039 err = netdev_pop_header(p->netdev, packets, cnt);
3042 for (i = 0; i < cnt; i++) {
3043 packets[i]->md.in_port.odp_port = portno;
3047 dp_netdev_input(pmd, packets, cnt);
3050 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3057 case OVS_ACTION_ATTR_USERSPACE:
3058 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3059 const struct nlattr *userdata;
3060 struct ofpbuf actions;
3063 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
3064 ofpbuf_init(&actions, 0);
3066 for (i = 0; i < cnt; i++) {
3069 ofpbuf_clear(&actions);
3071 flow_extract(&packets[i]->ofpbuf, &packets[i]->md, &flow);
3072 error = dp_netdev_upcall(dp, packets[i], &flow, NULL,
3073 DPIF_UC_ACTION, userdata, &actions,
3075 if (!error || error == ENOSPC) {
3076 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
3077 ofpbuf_data(&actions),
3078 ofpbuf_size(&actions));
3079 } else if (may_steal) {
3080 dpif_packet_delete(packets[i]);
3083 ofpbuf_uninit(&actions);
3084 fat_rwlock_unlock(&dp->upcall_rwlock);
3090 case OVS_ACTION_ATTR_HASH: {
3091 const struct ovs_action_hash *hash_act;
3094 hash_act = nl_attr_get(a);
3096 for (i = 0; i < cnt; i++) {
3098 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
3099 /* Hash need not be symmetric, nor does it need to include
3101 hash = hash_2words(dpif_packet_get_dp_hash(packets[i]),
3102 hash_act->hash_basis);
3104 VLOG_WARN("Unknown hash algorithm specified "
3105 "for the hash action.");
3110 hash = 1; /* 0 is not valid */
3113 dpif_packet_set_dp_hash(packets[i], hash);
3118 case OVS_ACTION_ATTR_RECIRC:
3119 if (*depth < MAX_RECIRC_DEPTH) {
3122 for (i = 0; i < cnt; i++) {
3123 struct dpif_packet *recirc_pkt;
3125 recirc_pkt = (may_steal) ? packets[i]
3126 : dpif_packet_clone(packets[i]);
3128 recirc_pkt->md.recirc_id = nl_attr_get_u32(a);
3130 /* Hash is private to each packet */
3131 recirc_pkt->md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
3133 dp_netdev_input(pmd, &recirc_pkt, 1);
3140 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3143 case OVS_ACTION_ATTR_PUSH_VLAN:
3144 case OVS_ACTION_ATTR_POP_VLAN:
3145 case OVS_ACTION_ATTR_PUSH_MPLS:
3146 case OVS_ACTION_ATTR_POP_MPLS:
3147 case OVS_ACTION_ATTR_SET:
3148 case OVS_ACTION_ATTR_SET_MASKED:
3149 case OVS_ACTION_ATTR_SAMPLE:
3150 case OVS_ACTION_ATTR_UNSPEC:
3151 case __OVS_ACTION_ATTR_MAX:
3155 dp_netdev_drop_packets(packets, cnt, may_steal);
3159 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
3160 struct dpif_packet **packets, int cnt,
3162 const struct nlattr *actions, size_t actions_len)
3164 struct dp_netdev_execute_aux aux = { pmd };
3166 odp_execute_actions(&aux, packets, cnt, may_steal, actions,
3167 actions_len, dp_execute_cb);
3170 const struct dpif_class dpif_netdev_class = {
3172 dpif_netdev_enumerate,
3173 dpif_netdev_port_open_type,
3176 dpif_netdev_destroy,
3179 dpif_netdev_get_stats,
3180 dpif_netdev_port_add,
3181 dpif_netdev_port_del,
3182 dpif_netdev_port_query_by_number,
3183 dpif_netdev_port_query_by_name,
3184 NULL, /* port_get_pid */
3185 dpif_netdev_port_dump_start,
3186 dpif_netdev_port_dump_next,
3187 dpif_netdev_port_dump_done,
3188 dpif_netdev_port_poll,
3189 dpif_netdev_port_poll_wait,
3190 dpif_netdev_flow_flush,
3191 dpif_netdev_flow_dump_create,
3192 dpif_netdev_flow_dump_destroy,
3193 dpif_netdev_flow_dump_thread_create,
3194 dpif_netdev_flow_dump_thread_destroy,
3195 dpif_netdev_flow_dump_next,
3196 dpif_netdev_operate,
3197 NULL, /* recv_set */
3198 NULL, /* handlers_set */
3199 dpif_netdev_pmd_set,
3200 dpif_netdev_queue_to_priority,
3202 NULL, /* recv_wait */
3203 NULL, /* recv_purge */
3204 dpif_netdev_register_upcall_cb,
3205 dpif_netdev_enable_upcall,
3206 dpif_netdev_disable_upcall,
3207 dpif_netdev_get_datapath_version,
3211 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
3212 const char *argv[], void *aux OVS_UNUSED)
3214 struct dp_netdev_port *old_port;
3215 struct dp_netdev_port *new_port;
3216 struct dp_netdev *dp;
3219 ovs_mutex_lock(&dp_netdev_mutex);
3220 dp = shash_find_data(&dp_netdevs, argv[1]);
3221 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3222 ovs_mutex_unlock(&dp_netdev_mutex);
3223 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3226 ovs_refcount_ref(&dp->ref_cnt);
3227 ovs_mutex_unlock(&dp_netdev_mutex);
3229 ovs_mutex_lock(&dp->port_mutex);
3230 if (get_port_by_name(dp, argv[2], &old_port)) {
3231 unixctl_command_reply_error(conn, "unknown port");
3235 port_no = u32_to_odp(atoi(argv[3]));
3236 if (!port_no || port_no == ODPP_NONE) {
3237 unixctl_command_reply_error(conn, "bad port number");
3240 if (dp_netdev_lookup_port(dp, port_no)) {
3241 unixctl_command_reply_error(conn, "port number already in use");
3245 /* Remove old port. */
3246 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3247 ovsrcu_postpone(free, old_port);
3249 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3250 new_port = xmemdup(old_port, sizeof *old_port);
3251 new_port->port_no = port_no;
3252 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3254 seq_change(dp->port_seq);
3255 unixctl_command_reply(conn, NULL);
3258 ovs_mutex_unlock(&dp->port_mutex);
3259 dp_netdev_unref(dp);
3263 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3264 const char *argv[], void *aux OVS_UNUSED)
3266 struct dp_netdev_port *port;
3267 struct dp_netdev *dp;
3269 ovs_mutex_lock(&dp_netdev_mutex);
3270 dp = shash_find_data(&dp_netdevs, argv[1]);
3271 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3272 ovs_mutex_unlock(&dp_netdev_mutex);
3273 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3276 ovs_refcount_ref(&dp->ref_cnt);
3277 ovs_mutex_unlock(&dp_netdev_mutex);
3279 ovs_mutex_lock(&dp->port_mutex);
3280 if (get_port_by_name(dp, argv[2], &port)) {
3281 unixctl_command_reply_error(conn, "unknown port");
3282 } else if (port->port_no == ODPP_LOCAL) {
3283 unixctl_command_reply_error(conn, "can't delete local port");
3285 do_del_port(dp, port);
3286 unixctl_command_reply(conn, NULL);
3288 ovs_mutex_unlock(&dp->port_mutex);
3290 dp_netdev_unref(dp);
3294 dpif_dummy_register__(const char *type)
3296 struct dpif_class *class;
3298 class = xmalloc(sizeof *class);
3299 *class = dpif_netdev_class;
3300 class->type = xstrdup(type);
3301 dp_register_provider(class);
3305 dpif_dummy_register(bool override)
3312 dp_enumerate_types(&types);
3313 SSET_FOR_EACH (type, &types) {
3314 if (!dp_unregister_provider(type)) {
3315 dpif_dummy_register__(type);
3318 sset_destroy(&types);
3321 dpif_dummy_register__("dummy");
3323 unixctl_command_register("dpif-dummy/change-port-number",
3324 "dp port new-number",
3325 3, 3, dpif_dummy_change_port_number, NULL);
3326 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3327 2, 2, dpif_dummy_delete_port, NULL);
3330 /* Datapath Classifier. */
3332 /* A set of rules that all have the same fields wildcarded. */
3333 struct dpcls_subtable {
3334 /* The fields are only used by writers. */
3335 struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
3337 /* These fields are accessed by readers. */
3338 struct cmap rules; /* Contains "struct dpcls_rule"s. */
3339 struct netdev_flow_key mask; /* Wildcards for fields (const). */
3340 /* 'mask' must be the last field, additional space is allocated here. */
3343 /* Initializes 'cls' as a classifier that initially contains no classification
3346 dpcls_init(struct dpcls *cls)
3348 cmap_init(&cls->subtables_map);
3349 pvector_init(&cls->subtables);
3353 dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
3355 pvector_remove(&cls->subtables, subtable);
3356 cmap_remove(&cls->subtables_map, &subtable->cmap_node,
3357 subtable->mask.hash);
3358 cmap_destroy(&subtable->rules);
3359 ovsrcu_postpone(free, subtable);
3362 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
3363 * caller's responsibility.
3364 * May only be called after all the readers have been terminated. */
3366 dpcls_destroy(struct dpcls *cls)
3369 struct dpcls_subtable *subtable;
3371 CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
3372 dpcls_destroy_subtable(cls, subtable);
3374 cmap_destroy(&cls->subtables_map);
3375 pvector_destroy(&cls->subtables);
3379 static struct dpcls_subtable *
3380 dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3382 struct dpcls_subtable *subtable;
3384 /* Need to add one. */
3385 subtable = xmalloc(sizeof *subtable
3386 - sizeof subtable->mask.mf + mask->len);
3387 cmap_init(&subtable->rules);
3388 netdev_flow_key_clone(&subtable->mask, mask);
3389 cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
3390 pvector_insert(&cls->subtables, subtable, 0);
3395 static inline struct dpcls_subtable *
3396 dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3398 struct dpcls_subtable *subtable;
3400 CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
3401 &cls->subtables_map) {
3402 if (netdev_flow_key_equal(&subtable->mask, mask)) {
3406 return dpcls_create_subtable(cls, mask);
3409 /* Insert 'rule' into 'cls'. */
3411 dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
3412 const struct netdev_flow_key *mask)
3414 struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
3416 rule->mask = &subtable->mask;
3417 cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
3420 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
3422 dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
3424 struct dpcls_subtable *subtable;
3426 ovs_assert(rule->mask);
3428 INIT_CONTAINER(subtable, rule->mask, mask);
3430 if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
3432 dpcls_destroy_subtable(cls, subtable);
3436 /* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
3437 * in 'mask' the values in 'key' and 'target' are the same.
3439 * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
3441 dpcls_rule_matches_key(const struct dpcls_rule *rule,
3442 const struct netdev_flow_key *target)
3444 const uint32_t *keyp = rule->flow.mf.inline_values;
3445 const uint32_t *maskp = rule->mask->mf.inline_values;
3446 uint32_t target_u32;
3448 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u32, target, rule->flow.mf.map) {
3449 if (OVS_UNLIKELY((target_u32 & *maskp++) != *keyp++)) {
3456 /* For each miniflow in 'flows' performs a classifier lookup writing the result
3457 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
3458 * NULL it is skipped.
3460 * This function is optimized for use in the userspace datapath and therefore
3461 * does not implement a lot of features available in the standard
3462 * classifier_lookup() function. Specifically, it does not implement
3463 * priorities, instead returning any rule which matches the flow.
3465 * Returns true if all flows found a corresponding rule. */
3467 dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
3468 struct dpcls_rule **rules, const size_t cnt)
3470 /* The batch size 16 was experimentally found faster than 8 or 32. */
3471 typedef uint16_t map_type;
3472 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
3474 #if !defined(__CHECKER__) && !defined(_WIN32)
3475 const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
3477 enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_RX_BATCH, MAP_BITS) };
3479 map_type maps[N_MAPS];
3480 struct dpcls_subtable *subtable;
3482 memset(maps, 0xff, sizeof maps);
3483 if (cnt % MAP_BITS) {
3484 maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
3486 memset(rules, 0, cnt * sizeof *rules);
3488 PVECTOR_FOR_EACH (subtable, &cls->subtables) {
3489 const struct netdev_flow_key *mkeys = keys;
3490 struct dpcls_rule **mrules = rules;
3491 map_type remains = 0;
3494 BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
3496 for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
3497 uint32_t hashes[MAP_BITS];
3498 const struct cmap_node *nodes[MAP_BITS];
3499 unsigned long map = maps[m];
3503 continue; /* Skip empty maps. */
3506 /* Compute hashes for the remaining keys. */
3507 ULONG_FOR_EACH_1(i, map) {
3508 hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
3512 map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
3513 /* Check results. */
3514 ULONG_FOR_EACH_1(i, map) {
3515 struct dpcls_rule *rule;
3517 CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
3518 if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
3523 ULONG_SET0(map, i); /* Did not match. */
3525 ; /* Keep Sparse happy. */
3527 maps[m] &= ~map; /* Clear the found rules. */
3531 return true; /* All found. */
3534 return false; /* Some misses. */