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];
132 int sweep_idx; /* For emc_cache_slow_sweep(). */
135 /* Iterate in the exact match cache through every entry that might contain a
136 * miniflow with hash 'HASH'. */
137 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
138 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
139 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
140 i__ < EM_FLOW_HASH_SEGS; \
141 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
143 /* Simple non-wildcarding single-priority classifier. */
146 struct cmap subtables_map;
147 struct pvector subtables;
150 /* A rule to be inserted to the classifier. */
152 struct cmap_node cmap_node; /* Within struct dpcls_subtable 'rules'. */
153 struct netdev_flow_key *mask; /* Subtable's mask. */
154 struct netdev_flow_key flow; /* Matching key. */
155 /* 'flow' must be the last field, additional space is allocated here. */
158 static void dpcls_init(struct dpcls *);
159 static void dpcls_destroy(struct dpcls *);
160 static void dpcls_insert(struct dpcls *, struct dpcls_rule *,
161 const struct netdev_flow_key *mask);
162 static void dpcls_remove(struct dpcls *, struct dpcls_rule *);
163 static bool dpcls_lookup(const struct dpcls *cls,
164 const struct netdev_flow_key keys[],
165 struct dpcls_rule **rules, size_t cnt);
167 /* Datapath based on the network device interface from netdev.h.
173 * Some members, marked 'const', are immutable. Accessing other members
174 * requires synchronization, as noted in more detail below.
176 * Acquisition order is, from outermost to innermost:
178 * dp_netdev_mutex (global)
183 const struct dpif_class *const class;
184 const char *const name;
186 struct ovs_refcount ref_cnt;
187 atomic_flag destroyed;
191 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
192 * changes to 'cls' must be made while still holding the 'flow_mutex'.
194 struct ovs_mutex flow_mutex;
196 struct cmap flow_table OVS_GUARDED; /* Flow table. */
200 * ovsthread_stats is internally synchronized. */
201 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
205 * Protected by RCU. Take the mutex to add or remove ports. */
206 struct ovs_mutex port_mutex;
208 struct seq *port_seq; /* Incremented whenever a port changes. */
210 /* Protects access to ofproto-dpif-upcall interface during revalidator
211 * thread synchronization. */
212 struct fat_rwlock upcall_rwlock;
213 upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
216 /* Stores all 'struct dp_netdev_pmd_thread's. */
217 struct cmap poll_threads;
219 /* Protects the access of the 'struct dp_netdev_pmd_thread'
220 * instance for non-pmd thread. */
221 struct ovs_mutex non_pmd_mutex;
223 /* Each pmd thread will store its pointer to
224 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
225 ovsthread_key_t per_pmd_key;
227 /* Number of rx queues for each dpdk interface and the cpu mask
228 * for pin of pmd threads. */
231 uint64_t last_tnl_conf_seq;
234 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
238 DP_STAT_HIT, /* Packets that matched in the flow table. */
239 DP_STAT_MISS, /* Packets that did not match. */
240 DP_STAT_LOST, /* Packets not passed up to the client. */
244 /* Contained by struct dp_netdev's 'stats' member. */
245 struct dp_netdev_stats {
246 struct ovs_mutex mutex; /* Protects 'n'. */
248 /* Indexed by DP_STAT_*, protected by 'mutex'. */
249 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
253 /* A port in a netdev-based datapath. */
254 struct dp_netdev_port {
255 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
257 struct netdev *netdev;
258 struct netdev_saved_flags *sf;
259 struct netdev_rxq **rxq;
260 struct ovs_refcount ref_cnt;
261 char *type; /* Port type as requested by user. */
265 /* A flow in dp_netdev's 'flow_table'.
271 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
272 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
277 * The thread safety rules described here for "struct dp_netdev_flow" are
278 * motivated by two goals:
280 * - Prevent threads that read members of "struct dp_netdev_flow" from
281 * reading bad data due to changes by some thread concurrently modifying
284 * - Prevent two threads making changes to members of a given "struct
285 * dp_netdev_flow" from interfering with each other.
291 * A flow 'flow' may be accessed without a risk of being freed during an RCU
292 * grace period. Code that needs to hold onto a flow for a while
293 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
295 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
296 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
299 * Some members, marked 'const', are immutable. Accessing other members
300 * requires synchronization, as noted in more detail below.
302 struct dp_netdev_flow {
305 /* Hash table index by unmasked flow. */
306 const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
307 const struct flow flow; /* Unmasked flow that created this entry. */
309 /* Number of references.
310 * The classifier owns one reference.
311 * Any thread trying to keep a rule from being freed should hold its own
313 struct ovs_refcount ref_cnt;
317 * Reading or writing these members requires 'mutex'. */
318 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
321 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
323 /* Packet classification. */
324 struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
325 /* 'cr' must be the last member. */
328 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
329 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
331 /* Contained by struct dp_netdev_flow's 'stats' member. */
332 struct dp_netdev_flow_stats {
333 struct ovs_mutex mutex; /* Guards all the other members. */
335 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
336 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
337 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
338 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
341 /* A set of datapath actions within a "struct dp_netdev_flow".
347 * A struct dp_netdev_actions 'actions' is protected with RCU. */
348 struct dp_netdev_actions {
349 /* These members are immutable: they do not change during the struct's
351 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
352 unsigned int size; /* Size of 'actions', in bytes. */
355 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
357 struct dp_netdev_actions *dp_netdev_flow_get_actions(
358 const struct dp_netdev_flow *);
359 static void dp_netdev_actions_free(struct dp_netdev_actions *);
361 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
362 * the performance overhead of interrupt processing. Therefore netdev can
363 * not implement rx-wait for these devices. dpif-netdev needs to poll
364 * these device to check for recv buffer. pmd-thread does polling for
365 * devices assigned to itself thread.
367 * DPDK used PMD for accessing NIC.
369 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
370 * I/O of all non-pmd threads. There will be no actual thread created
373 struct dp_netdev_pmd_thread {
374 struct dp_netdev *dp;
375 struct cmap_node node; /* In 'dp->poll_threads'. */
377 pthread_cond_t cond; /* For synchronizing pmd thread reload. */
378 struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
380 /* Per thread exact-match cache. Note, the instance for cpu core
381 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
382 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
383 * instances will only be accessed by its own pmd thread. */
384 struct emc_cache flow_cache;
385 struct latch exit_latch; /* For terminating the pmd thread. */
386 atomic_uint change_seq; /* For reloading pmd ports. */
388 int index; /* Idx of this pmd thread among pmd*/
389 /* threads on same numa node. */
390 int core_id; /* CPU core id of this pmd thread. */
391 int numa_id; /* numa node id of this pmd thread. */
394 #define PMD_INITIAL_SEQ 1
396 /* Interface to netdev-based datapath. */
399 struct dp_netdev *dp;
400 uint64_t last_port_seq;
403 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
404 struct dp_netdev_port **portp);
405 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
406 struct dp_netdev_port **portp);
407 static void dp_netdev_free(struct dp_netdev *)
408 OVS_REQUIRES(dp_netdev_mutex);
409 static void dp_netdev_flow_flush(struct dp_netdev *);
410 static int do_add_port(struct dp_netdev *dp, const char *devname,
411 const char *type, odp_port_t port_no)
412 OVS_REQUIRES(dp->port_mutex);
413 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
414 OVS_REQUIRES(dp->port_mutex);
415 static int dpif_netdev_open(const struct dpif_class *, const char *name,
416 bool create, struct dpif **);
417 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
418 struct dpif_packet **, int c,
420 const struct nlattr *actions,
422 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
423 struct dpif_packet **, int cnt);
425 static void dp_netdev_disable_upcall(struct dp_netdev *);
426 void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
427 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
428 struct dp_netdev *dp, int index,
429 int core_id, int numa_id);
430 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
431 static struct dp_netdev_pmd_thread *dp_netdev_get_nonpmd(struct dp_netdev *dp);
432 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
433 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
434 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
435 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
437 static inline bool emc_entry_alive(struct emc_entry *ce);
438 static void emc_clear_entry(struct emc_entry *ce);
441 emc_cache_init(struct emc_cache *flow_cache)
445 BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
447 flow_cache->sweep_idx = 0;
448 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
449 flow_cache->entries[i].flow = NULL;
450 flow_cache->entries[i].key.hash = 0;
451 flow_cache->entries[i].key.len
452 = offsetof(struct miniflow, inline_values);
453 miniflow_initialize(&flow_cache->entries[i].key.mf,
454 flow_cache->entries[i].key.buf);
459 emc_cache_uninit(struct emc_cache *flow_cache)
463 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
464 emc_clear_entry(&flow_cache->entries[i]);
468 /* Check and clear dead flow references slowly (one entry at each
471 emc_cache_slow_sweep(struct emc_cache *flow_cache)
473 struct emc_entry *entry = &flow_cache->entries[flow_cache->sweep_idx];
475 if (!emc_entry_alive(entry)) {
476 emc_clear_entry(entry);
478 flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
481 static struct dpif_netdev *
482 dpif_netdev_cast(const struct dpif *dpif)
484 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
485 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
488 static struct dp_netdev *
489 get_dp_netdev(const struct dpif *dpif)
491 return dpif_netdev_cast(dpif)->dp;
495 dpif_netdev_enumerate(struct sset *all_dps,
496 const struct dpif_class *dpif_class)
498 struct shash_node *node;
500 ovs_mutex_lock(&dp_netdev_mutex);
501 SHASH_FOR_EACH(node, &dp_netdevs) {
502 struct dp_netdev *dp = node->data;
503 if (dpif_class != dp->class) {
504 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
505 * If the class doesn't match, skip this dpif. */
508 sset_add(all_dps, node->name);
510 ovs_mutex_unlock(&dp_netdev_mutex);
516 dpif_netdev_class_is_dummy(const struct dpif_class *class)
518 return class != &dpif_netdev_class;
522 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
524 return strcmp(type, "internal") ? type
525 : dpif_netdev_class_is_dummy(class) ? "dummy"
530 create_dpif_netdev(struct dp_netdev *dp)
532 uint16_t netflow_id = hash_string(dp->name, 0);
533 struct dpif_netdev *dpif;
535 ovs_refcount_ref(&dp->ref_cnt);
537 dpif = xmalloc(sizeof *dpif);
538 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
540 dpif->last_port_seq = seq_read(dp->port_seq);
545 /* Choose an unused, non-zero port number and return it on success.
546 * Return ODPP_NONE on failure. */
548 choose_port(struct dp_netdev *dp, const char *name)
549 OVS_REQUIRES(dp->port_mutex)
553 if (dp->class != &dpif_netdev_class) {
557 /* If the port name begins with "br", start the number search at
558 * 100 to make writing tests easier. */
559 if (!strncmp(name, "br", 2)) {
563 /* If the port name contains a number, try to assign that port number.
564 * This can make writing unit tests easier because port numbers are
566 for (p = name; *p != '\0'; p++) {
567 if (isdigit((unsigned char) *p)) {
568 port_no = start_no + strtol(p, NULL, 10);
569 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
570 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
571 return u32_to_odp(port_no);
578 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
579 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
580 return u32_to_odp(port_no);
588 create_dp_netdev(const char *name, const struct dpif_class *class,
589 struct dp_netdev **dpp)
590 OVS_REQUIRES(dp_netdev_mutex)
592 struct dp_netdev *dp;
595 dp = xzalloc(sizeof *dp);
596 shash_add(&dp_netdevs, name, dp);
598 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
599 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
600 ovs_refcount_init(&dp->ref_cnt);
601 atomic_flag_clear(&dp->destroyed);
603 ovs_mutex_init(&dp->flow_mutex);
604 dpcls_init(&dp->cls);
605 cmap_init(&dp->flow_table);
607 ovsthread_stats_init(&dp->stats);
609 ovs_mutex_init(&dp->port_mutex);
610 cmap_init(&dp->ports);
611 dp->port_seq = seq_create();
612 fat_rwlock_init(&dp->upcall_rwlock);
614 /* Disable upcalls by default. */
615 dp_netdev_disable_upcall(dp);
616 dp->upcall_aux = NULL;
617 dp->upcall_cb = NULL;
619 cmap_init(&dp->poll_threads);
620 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
621 ovsthread_key_create(&dp->per_pmd_key, NULL);
623 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
624 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
625 dp_netdev_set_nonpmd(dp);
626 dp->n_dpdk_rxqs = NR_QUEUE;
628 ovs_mutex_lock(&dp->port_mutex);
629 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
630 ovs_mutex_unlock(&dp->port_mutex);
636 dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
642 dpif_netdev_open(const struct dpif_class *class, const char *name,
643 bool create, struct dpif **dpifp)
645 struct dp_netdev *dp;
648 ovs_mutex_lock(&dp_netdev_mutex);
649 dp = shash_find_data(&dp_netdevs, name);
651 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
653 error = (dp->class != class ? EINVAL
658 *dpifp = create_dpif_netdev(dp);
661 ovs_mutex_unlock(&dp_netdev_mutex);
667 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
668 OVS_NO_THREAD_SAFETY_ANALYSIS
670 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
671 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
673 /* Before freeing a lock we should release it */
674 fat_rwlock_unlock(&dp->upcall_rwlock);
675 fat_rwlock_destroy(&dp->upcall_rwlock);
678 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
679 * through the 'dp_netdevs' shash while freeing 'dp'. */
681 dp_netdev_free(struct dp_netdev *dp)
682 OVS_REQUIRES(dp_netdev_mutex)
684 struct dp_netdev_port *port;
685 struct dp_netdev_stats *bucket;
688 shash_find_and_delete(&dp_netdevs, dp->name);
690 dp_netdev_destroy_all_pmds(dp);
691 cmap_destroy(&dp->poll_threads);
692 ovs_mutex_destroy(&dp->non_pmd_mutex);
693 ovsthread_key_delete(dp->per_pmd_key);
695 dp_netdev_flow_flush(dp);
696 ovs_mutex_lock(&dp->port_mutex);
697 CMAP_FOR_EACH (port, node, &dp->ports) {
698 do_del_port(dp, port);
700 ovs_mutex_unlock(&dp->port_mutex);
702 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
703 ovs_mutex_destroy(&bucket->mutex);
704 free_cacheline(bucket);
706 ovsthread_stats_destroy(&dp->stats);
708 dpcls_destroy(&dp->cls);
709 cmap_destroy(&dp->flow_table);
710 ovs_mutex_destroy(&dp->flow_mutex);
711 seq_destroy(dp->port_seq);
712 cmap_destroy(&dp->ports);
714 /* Upcalls must be disabled at this point */
715 dp_netdev_destroy_upcall_lock(dp);
718 free(CONST_CAST(char *, dp->name));
723 dp_netdev_unref(struct dp_netdev *dp)
726 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
727 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
728 ovs_mutex_lock(&dp_netdev_mutex);
729 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
732 ovs_mutex_unlock(&dp_netdev_mutex);
737 dpif_netdev_close(struct dpif *dpif)
739 struct dp_netdev *dp = get_dp_netdev(dpif);
746 dpif_netdev_destroy(struct dpif *dpif)
748 struct dp_netdev *dp = get_dp_netdev(dpif);
750 if (!atomic_flag_test_and_set(&dp->destroyed)) {
751 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
752 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
761 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
763 struct dp_netdev *dp = get_dp_netdev(dpif);
764 struct dp_netdev_stats *bucket;
767 stats->n_flows = cmap_count(&dp->flow_table);
769 stats->n_hit = stats->n_missed = stats->n_lost = 0;
770 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
771 ovs_mutex_lock(&bucket->mutex);
772 stats->n_hit += bucket->n[DP_STAT_HIT];
773 stats->n_missed += bucket->n[DP_STAT_MISS];
774 stats->n_lost += bucket->n[DP_STAT_LOST];
775 ovs_mutex_unlock(&bucket->mutex);
777 stats->n_masks = UINT32_MAX;
778 stats->n_mask_hit = UINT64_MAX;
784 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
788 if (pmd->core_id == NON_PMD_CORE_ID) {
792 ovs_mutex_lock(&pmd->cond_mutex);
793 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
794 ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
795 ovs_mutex_unlock(&pmd->cond_mutex);
798 /* Causes all pmd threads to reload its tx/rx devices.
799 * Must be called after adding/removing ports. */
801 dp_netdev_reload_pmds(struct dp_netdev *dp)
803 struct dp_netdev_pmd_thread *pmd;
805 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
806 dp_netdev_reload_pmd__(pmd);
811 hash_port_no(odp_port_t port_no)
813 return hash_int(odp_to_u32(port_no), 0);
817 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
819 OVS_REQUIRES(dp->port_mutex)
821 struct netdev_saved_flags *sf;
822 struct dp_netdev_port *port;
823 struct netdev *netdev;
824 enum netdev_flags flags;
825 const char *open_type;
829 /* XXX reject devices already in some dp_netdev. */
831 /* Open and validate network device. */
832 open_type = dpif_netdev_port_open_type(dp->class, type);
833 error = netdev_open(devname, open_type, &netdev);
837 /* XXX reject non-Ethernet devices */
839 netdev_get_flags(netdev, &flags);
840 if (flags & NETDEV_LOOPBACK) {
841 VLOG_ERR("%s: cannot add a loopback device", devname);
842 netdev_close(netdev);
846 if (netdev_is_pmd(netdev)) {
847 int n_cores = ovs_numa_get_n_cores();
849 if (n_cores == OVS_CORE_UNSPEC) {
850 VLOG_ERR("%s, cannot get cpu core info", devname);
853 /* There can only be ovs_numa_get_n_cores() pmd threads,
854 * so creates a txq for each. */
855 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
856 if (error && (error != EOPNOTSUPP)) {
857 VLOG_ERR("%s, cannot set multiq", devname);
861 port = xzalloc(sizeof *port);
862 port->port_no = port_no;
863 port->netdev = netdev;
864 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
865 port->type = xstrdup(type);
866 for (i = 0; i < netdev_n_rxq(netdev); i++) {
867 error = netdev_rxq_open(netdev, &port->rxq[i], i);
869 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
870 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
871 devname, ovs_strerror(errno));
872 netdev_close(netdev);
880 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
882 for (i = 0; i < netdev_n_rxq(netdev); i++) {
883 netdev_rxq_close(port->rxq[i]);
885 netdev_close(netdev);
893 ovs_refcount_init(&port->ref_cnt);
894 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
896 if (netdev_is_pmd(netdev)) {
897 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
898 dp_netdev_reload_pmds(dp);
900 seq_change(dp->port_seq);
906 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
907 odp_port_t *port_nop)
909 struct dp_netdev *dp = get_dp_netdev(dpif);
910 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
911 const char *dpif_port;
915 ovs_mutex_lock(&dp->port_mutex);
916 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
917 if (*port_nop != ODPP_NONE) {
919 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
921 port_no = choose_port(dp, dpif_port);
922 error = port_no == ODPP_NONE ? EFBIG : 0;
926 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
928 ovs_mutex_unlock(&dp->port_mutex);
934 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
936 struct dp_netdev *dp = get_dp_netdev(dpif);
939 ovs_mutex_lock(&dp->port_mutex);
940 if (port_no == ODPP_LOCAL) {
943 struct dp_netdev_port *port;
945 error = get_port_by_number(dp, port_no, &port);
947 do_del_port(dp, port);
950 ovs_mutex_unlock(&dp->port_mutex);
956 is_valid_port_number(odp_port_t port_no)
958 return port_no != ODPP_NONE;
961 static struct dp_netdev_port *
962 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
964 struct dp_netdev_port *port;
966 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
967 if (port->port_no == port_no) {
975 get_port_by_number(struct dp_netdev *dp,
976 odp_port_t port_no, struct dp_netdev_port **portp)
978 if (!is_valid_port_number(port_no)) {
982 *portp = dp_netdev_lookup_port(dp, port_no);
983 return *portp ? 0 : ENOENT;
988 port_ref(struct dp_netdev_port *port)
991 ovs_refcount_ref(&port->ref_cnt);
996 port_try_ref(struct dp_netdev_port *port)
999 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
1006 port_unref(struct dp_netdev_port *port)
1008 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
1009 int n_rxq = netdev_n_rxq(port->netdev);
1012 netdev_close(port->netdev);
1013 netdev_restore_flags(port->sf);
1015 for (i = 0; i < n_rxq; i++) {
1016 netdev_rxq_close(port->rxq[i]);
1025 get_port_by_name(struct dp_netdev *dp,
1026 const char *devname, struct dp_netdev_port **portp)
1027 OVS_REQUIRES(dp->port_mutex)
1029 struct dp_netdev_port *port;
1031 CMAP_FOR_EACH (port, node, &dp->ports) {
1032 if (!strcmp(netdev_get_name(port->netdev), devname)) {
1041 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
1043 struct dp_netdev_pmd_thread *pmd;
1046 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1047 if (pmd->numa_id == numa_id) {
1055 /* Returns 'true' if there is a port with pmd netdev and the netdev
1056 * is on numa node 'numa_id'. */
1058 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1060 struct dp_netdev_port *port;
1062 CMAP_FOR_EACH (port, node, &dp->ports) {
1063 if (netdev_is_pmd(port->netdev)
1064 && netdev_get_numa_id(port->netdev) == numa_id) {
1074 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1075 OVS_REQUIRES(dp->port_mutex)
1077 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1078 seq_change(dp->port_seq);
1079 if (netdev_is_pmd(port->netdev)) {
1080 int numa_id = netdev_get_numa_id(port->netdev);
1082 /* If there is no netdev on the numa node, deletes the pmd threads
1083 * for that numa. Else, just reloads the queues. */
1084 if (!has_pmd_port_for_numa(dp, numa_id)) {
1085 dp_netdev_del_pmds_on_numa(dp, numa_id);
1087 dp_netdev_reload_pmds(dp);
1094 answer_port_query(const struct dp_netdev_port *port,
1095 struct dpif_port *dpif_port)
1097 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1098 dpif_port->type = xstrdup(port->type);
1099 dpif_port->port_no = port->port_no;
1103 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1104 struct dpif_port *dpif_port)
1106 struct dp_netdev *dp = get_dp_netdev(dpif);
1107 struct dp_netdev_port *port;
1110 error = get_port_by_number(dp, port_no, &port);
1111 if (!error && dpif_port) {
1112 answer_port_query(port, dpif_port);
1119 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1120 struct dpif_port *dpif_port)
1122 struct dp_netdev *dp = get_dp_netdev(dpif);
1123 struct dp_netdev_port *port;
1126 ovs_mutex_lock(&dp->port_mutex);
1127 error = get_port_by_name(dp, devname, &port);
1128 if (!error && dpif_port) {
1129 answer_port_query(port, dpif_port);
1131 ovs_mutex_unlock(&dp->port_mutex);
1137 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1139 struct dp_netdev_flow_stats *bucket;
1142 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
1143 ovs_mutex_destroy(&bucket->mutex);
1144 free_cacheline(bucket);
1146 ovsthread_stats_destroy(&flow->stats);
1148 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1152 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1154 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1155 ovsrcu_postpone(dp_netdev_flow_free, flow);
1160 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
1161 OVS_REQUIRES(dp->flow_mutex)
1163 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1165 dpcls_remove(&dp->cls, &flow->cr);
1166 cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
1169 dp_netdev_flow_unref(flow);
1173 dp_netdev_flow_flush(struct dp_netdev *dp)
1175 struct dp_netdev_flow *netdev_flow;
1177 ovs_mutex_lock(&dp->flow_mutex);
1178 CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
1179 dp_netdev_remove_flow(dp, netdev_flow);
1181 ovs_mutex_unlock(&dp->flow_mutex);
1185 dpif_netdev_flow_flush(struct dpif *dpif)
1187 struct dp_netdev *dp = get_dp_netdev(dpif);
1189 dp_netdev_flow_flush(dp);
1193 struct dp_netdev_port_state {
1194 struct cmap_position position;
1199 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1201 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1206 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1207 struct dpif_port *dpif_port)
1209 struct dp_netdev_port_state *state = state_;
1210 struct dp_netdev *dp = get_dp_netdev(dpif);
1211 struct cmap_node *node;
1214 node = cmap_next_position(&dp->ports, &state->position);
1216 struct dp_netdev_port *port;
1218 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1221 state->name = xstrdup(netdev_get_name(port->netdev));
1222 dpif_port->name = state->name;
1223 dpif_port->type = port->type;
1224 dpif_port->port_no = port->port_no;
1235 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1237 struct dp_netdev_port_state *state = state_;
1244 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1246 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1247 uint64_t new_port_seq;
1250 new_port_seq = seq_read(dpif->dp->port_seq);
1251 if (dpif->last_port_seq != new_port_seq) {
1252 dpif->last_port_seq = new_port_seq;
1262 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1264 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1266 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1269 static struct dp_netdev_flow *
1270 dp_netdev_flow_cast(const struct dpcls_rule *cr)
1272 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1275 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1277 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1280 /* netdev_flow_key utilities.
1282 * netdev_flow_key is basically a miniflow. We use these functions
1283 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1284 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1286 * - Since we are dealing exclusively with miniflows created by
1287 * miniflow_extract(), if the map is different the miniflow is different.
1288 * Therefore we can be faster by comparing the map and the miniflow in a
1290 * _ netdev_flow_key's miniflow has always inline values.
1291 * - These functions can be inlined by the compiler.
1293 * The following assertions make sure that what we're doing with miniflow is
1296 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1297 == sizeof(uint64_t));
1299 /* Given the number of bits set in the miniflow map, returns the size of the
1300 * 'netdev_flow_key.mf' */
1301 static inline uint32_t
1302 netdev_flow_key_size(uint32_t flow_u32s)
1304 return offsetof(struct miniflow, inline_values) +
1305 MINIFLOW_VALUES_SIZE(flow_u32s);
1309 netdev_flow_key_equal(const struct netdev_flow_key *a,
1310 const struct netdev_flow_key *b)
1312 /* 'b->len' may be not set yet. */
1313 return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
1316 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1317 * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
1318 * generated by miniflow_extract. */
1320 netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
1321 const struct miniflow *mf)
1323 return !memcmp(&key->mf, mf, key->len);
1327 netdev_flow_key_clone(struct netdev_flow_key *dst,
1328 const struct netdev_flow_key *src)
1331 offsetof(struct netdev_flow_key, mf) + src->len);
1336 netdev_flow_key_from_flow(struct netdev_flow_key *dst,
1337 const struct flow *src)
1339 struct ofpbuf packet;
1340 uint64_t buf_stub[512 / 8];
1341 struct pkt_metadata md = pkt_metadata_from_flow(src);
1343 miniflow_initialize(&dst->mf, dst->buf);
1345 ofpbuf_use_stub(&packet, buf_stub, sizeof buf_stub);
1346 flow_compose(&packet, src);
1347 miniflow_extract(&packet, &md, &dst->mf);
1348 ofpbuf_uninit(&packet);
1350 dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
1351 dst->hash = 0; /* Not computed yet. */
1354 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1356 netdev_flow_mask_init(struct netdev_flow_key *mask,
1357 const struct match *match)
1359 const uint32_t *mask_u32 = (const uint32_t *) &match->wc.masks;
1360 uint32_t *dst = mask->mf.inline_values;
1361 uint64_t map, mask_map = 0;
1365 /* Only check masks that make sense for the flow. */
1366 map = flow_wc_map(&match->flow);
1369 uint64_t rm1bit = rightmost_1bit(map);
1370 int i = raw_ctz(map);
1374 *dst++ = mask_u32[i];
1375 hash = hash_add(hash, mask_u32[i]);
1380 mask->mf.values_inline = true;
1381 mask->mf.map = mask_map;
1383 hash = hash_add(hash, mask_map);
1384 hash = hash_add(hash, mask_map >> 32);
1386 n = dst - mask->mf.inline_values;
1388 mask->hash = hash_finish(hash, n * 4);
1389 mask->len = netdev_flow_key_size(n);
1392 /* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
1394 netdev_flow_key_init_masked(struct netdev_flow_key *dst,
1395 const struct flow *flow,
1396 const struct netdev_flow_key *mask)
1398 uint32_t *dst_u32 = dst->mf.inline_values;
1399 const uint32_t *mask_u32 = mask->mf.inline_values;
1403 dst->len = mask->len;
1404 dst->mf.values_inline = true;
1405 dst->mf.map = mask->mf.map;
1407 FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
1408 *dst_u32 = value & *mask_u32++;
1409 hash = hash_add(hash, *dst_u32++);
1411 dst->hash = hash_finish(hash, (dst_u32 - dst->mf.inline_values) * 4);
1414 /* Iterate through all netdev_flow_key u32 values specified by 'MAP' */
1415 #define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
1416 for (struct mf_for_each_in_map_aux aux__ \
1417 = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
1418 mf_get_next_in_map(&aux__, &(VALUE)); \
1421 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1423 static inline uint32_t
1424 netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
1425 const struct netdev_flow_key *mask)
1427 const uint32_t *p = mask->mf.inline_values;
1431 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u32, key, mask->mf.map) {
1432 hash = hash_add(hash, key_u32 & *p++);
1435 return hash_finish(hash, (p - mask->mf.inline_values) * 4);
1439 emc_entry_alive(struct emc_entry *ce)
1441 return ce->flow && !ce->flow->dead;
1445 emc_clear_entry(struct emc_entry *ce)
1448 dp_netdev_flow_unref(ce->flow);
1454 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1455 const struct netdev_flow_key *key)
1457 if (ce->flow != flow) {
1459 dp_netdev_flow_unref(ce->flow);
1462 if (dp_netdev_flow_ref(flow)) {
1469 netdev_flow_key_clone(&ce->key, key);
1474 emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
1475 struct dp_netdev_flow *flow)
1477 struct emc_entry *to_be_replaced = NULL;
1478 struct emc_entry *current_entry;
1480 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1481 if (netdev_flow_key_equal(¤t_entry->key, key)) {
1482 /* We found the entry with the 'mf' miniflow */
1483 emc_change_entry(current_entry, flow, NULL);
1487 /* Replacement policy: put the flow in an empty (not alive) entry, or
1488 * in the first entry where it can be */
1490 || (emc_entry_alive(to_be_replaced)
1491 && !emc_entry_alive(current_entry))
1492 || current_entry->key.hash < to_be_replaced->key.hash) {
1493 to_be_replaced = current_entry;
1496 /* We didn't find the miniflow in the cache.
1497 * The 'to_be_replaced' entry is where the new flow will be stored */
1499 emc_change_entry(to_be_replaced, flow, key);
1502 static inline struct dp_netdev_flow *
1503 emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
1505 struct emc_entry *current_entry;
1507 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1508 if (current_entry->key.hash == key->hash
1509 && emc_entry_alive(current_entry)
1510 && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
1512 /* We found the entry with the 'key->mf' miniflow */
1513 return current_entry->flow;
1520 static struct dp_netdev_flow *
1521 dp_netdev_lookup_flow(const struct dp_netdev *dp,
1522 const struct netdev_flow_key *key)
1524 struct dp_netdev_flow *netdev_flow;
1525 struct dpcls_rule *rule;
1527 dpcls_lookup(&dp->cls, key, &rule, 1);
1528 netdev_flow = dp_netdev_flow_cast(rule);
1533 static struct dp_netdev_flow *
1534 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1536 struct dp_netdev_flow *netdev_flow;
1538 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1540 if (flow_equal(&netdev_flow->flow, flow)) {
1549 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow,
1550 struct dpif_flow_stats *stats)
1552 struct dp_netdev_flow_stats *bucket;
1555 memset(stats, 0, sizeof *stats);
1556 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1557 ovs_mutex_lock(&bucket->mutex);
1558 stats->n_packets += bucket->packet_count;
1559 stats->n_bytes += bucket->byte_count;
1560 stats->used = MAX(stats->used, bucket->used);
1561 stats->tcp_flags |= bucket->tcp_flags;
1562 ovs_mutex_unlock(&bucket->mutex);
1567 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1568 struct ofpbuf *buffer, struct dpif_flow *flow)
1570 struct flow_wildcards wc;
1571 struct dp_netdev_actions *actions;
1573 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1574 odp_flow_key_from_mask(buffer, &wc.masks, &netdev_flow->flow,
1575 odp_to_u32(wc.masks.in_port.odp_port),
1577 flow->mask = ofpbuf_data(buffer);
1578 flow->mask_len = ofpbuf_size(buffer);
1580 actions = dp_netdev_flow_get_actions(netdev_flow);
1581 flow->actions = actions->actions;
1582 flow->actions_len = actions->size;
1584 get_dpif_flow_stats(netdev_flow, &flow->stats);
1588 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1589 const struct nlattr *mask_key,
1590 uint32_t mask_key_len, const struct flow *flow,
1594 enum odp_key_fitness fitness;
1596 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1598 /* This should not happen: it indicates that
1599 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1600 * disagree on the acceptable form of a mask. Log the problem
1601 * as an error, with enough details to enable debugging. */
1602 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1604 if (!VLOG_DROP_ERR(&rl)) {
1608 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1610 VLOG_ERR("internal error parsing flow mask %s (%s)",
1611 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1618 enum mf_field_id id;
1619 /* No mask key, unwildcard everything except fields whose
1620 * prerequisities are not met. */
1621 memset(mask, 0x0, sizeof *mask);
1623 for (id = 0; id < MFF_N_IDS; ++id) {
1624 /* Skip registers and metadata. */
1625 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1626 && id != MFF_METADATA) {
1627 const struct mf_field *mf = mf_from_id(id);
1628 if (mf_are_prereqs_ok(mf, flow)) {
1629 mf_mask_field(mf, mask);
1635 /* Force unwildcard the in_port.
1637 * We need to do this even in the case where we unwildcard "everything"
1638 * above because "everything" only includes the 16-bit OpenFlow port number
1639 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1640 * port number mask->in_port.odp_port. */
1641 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1647 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1652 if (odp_flow_key_to_flow(key, key_len, flow)) {
1653 /* This should not happen: it indicates that odp_flow_key_from_flow()
1654 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1655 * flow. Log the problem as an error, with enough details to enable
1657 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1659 if (!VLOG_DROP_ERR(&rl)) {
1663 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1664 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1671 in_port = flow->in_port.odp_port;
1672 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1680 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1682 struct dp_netdev *dp = get_dp_netdev(dpif);
1683 struct dp_netdev_flow *netdev_flow;
1687 error = dpif_netdev_flow_from_nlattrs(get->key, get->key_len, &key);
1692 netdev_flow = dp_netdev_find_flow(dp, &key);
1695 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->flow);
1703 static struct dp_netdev_flow *
1704 dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
1705 const struct nlattr *actions, size_t actions_len)
1706 OVS_REQUIRES(dp->flow_mutex)
1708 struct dp_netdev_flow *flow;
1709 struct netdev_flow_key mask;
1711 netdev_flow_mask_init(&mask, match);
1712 /* Make sure wc does not have metadata. */
1713 ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
1715 /* Do not allocate extra space. */
1716 flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
1718 *CONST_CAST(struct flow *, &flow->flow) = match->flow;
1719 ovs_refcount_init(&flow->ref_cnt);
1720 ovsthread_stats_init(&flow->stats);
1721 ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
1723 cmap_insert(&dp->flow_table,
1724 CONST_CAST(struct cmap_node *, &flow->node),
1725 flow_hash(&flow->flow, 0));
1726 netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
1727 dpcls_insert(&dp->cls, &flow->cr, &mask);
1729 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1731 struct ds ds = DS_EMPTY_INITIALIZER;
1733 match.flow = flow->flow;
1734 miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
1736 ds_put_cstr(&ds, "flow_add: ");
1737 match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
1738 ds_put_cstr(&ds, ", actions:");
1739 format_odp_actions(&ds, actions, actions_len);
1741 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
1750 clear_stats(struct dp_netdev_flow *netdev_flow)
1752 struct dp_netdev_flow_stats *bucket;
1755 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1756 ovs_mutex_lock(&bucket->mutex);
1758 bucket->packet_count = 0;
1759 bucket->byte_count = 0;
1760 bucket->tcp_flags = 0;
1761 ovs_mutex_unlock(&bucket->mutex);
1766 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1768 struct dp_netdev *dp = get_dp_netdev(dpif);
1769 struct dp_netdev_flow *netdev_flow;
1770 struct netdev_flow_key key;
1774 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
1778 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1779 put->mask, put->mask_len,
1780 &match.flow, &match.wc.masks);
1785 /* Must produce a netdev_flow_key for lookup.
1786 * This interface is no longer performance critical, since it is not used
1787 * for upcall processing any more. */
1788 netdev_flow_key_from_flow(&key, &match.flow);
1790 ovs_mutex_lock(&dp->flow_mutex);
1791 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1793 if (put->flags & DPIF_FP_CREATE) {
1794 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1796 memset(put->stats, 0, sizeof *put->stats);
1798 dp_netdev_flow_add(dp, &match, put->actions, put->actions_len);
1807 if (put->flags & DPIF_FP_MODIFY
1808 && flow_equal(&match.flow, &netdev_flow->flow)) {
1809 struct dp_netdev_actions *new_actions;
1810 struct dp_netdev_actions *old_actions;
1812 new_actions = dp_netdev_actions_create(put->actions,
1815 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1816 ovsrcu_set(&netdev_flow->actions, new_actions);
1819 get_dpif_flow_stats(netdev_flow, put->stats);
1821 if (put->flags & DPIF_FP_ZERO_STATS) {
1822 clear_stats(netdev_flow);
1825 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1826 } else if (put->flags & DPIF_FP_CREATE) {
1829 /* Overlapping flow. */
1833 ovs_mutex_unlock(&dp->flow_mutex);
1839 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1841 struct dp_netdev *dp = get_dp_netdev(dpif);
1842 struct dp_netdev_flow *netdev_flow;
1846 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1851 ovs_mutex_lock(&dp->flow_mutex);
1852 netdev_flow = dp_netdev_find_flow(dp, &key);
1855 get_dpif_flow_stats(netdev_flow, del->stats);
1857 dp_netdev_remove_flow(dp, netdev_flow);
1861 ovs_mutex_unlock(&dp->flow_mutex);
1866 struct dpif_netdev_flow_dump {
1867 struct dpif_flow_dump up;
1868 struct cmap_position pos;
1870 struct ovs_mutex mutex;
1873 static struct dpif_netdev_flow_dump *
1874 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1876 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1879 static struct dpif_flow_dump *
1880 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1882 struct dpif_netdev_flow_dump *dump;
1884 dump = xmalloc(sizeof *dump);
1885 dpif_flow_dump_init(&dump->up, dpif_);
1886 memset(&dump->pos, 0, sizeof dump->pos);
1888 ovs_mutex_init(&dump->mutex);
1894 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1896 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1898 ovs_mutex_destroy(&dump->mutex);
1903 struct dpif_netdev_flow_dump_thread {
1904 struct dpif_flow_dump_thread up;
1905 struct dpif_netdev_flow_dump *dump;
1906 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1907 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1910 static struct dpif_netdev_flow_dump_thread *
1911 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1913 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1916 static struct dpif_flow_dump_thread *
1917 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1919 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1920 struct dpif_netdev_flow_dump_thread *thread;
1922 thread = xmalloc(sizeof *thread);
1923 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1924 thread->dump = dump;
1929 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1931 struct dpif_netdev_flow_dump_thread *thread
1932 = dpif_netdev_flow_dump_thread_cast(thread_);
1938 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1939 struct dpif_flow *flows, int max_flows)
1941 struct dpif_netdev_flow_dump_thread *thread
1942 = dpif_netdev_flow_dump_thread_cast(thread_);
1943 struct dpif_netdev_flow_dump *dump = thread->dump;
1944 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1945 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1946 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1950 ovs_mutex_lock(&dump->mutex);
1951 if (!dump->status) {
1952 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1954 struct cmap_node *node;
1956 node = cmap_next_position(&dp->flow_table, &dump->pos);
1961 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
1965 ovs_mutex_unlock(&dump->mutex);
1967 for (i = 0; i < n_flows; i++) {
1968 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
1969 struct odputil_keybuf *keybuf = &thread->keybuf[i];
1970 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
1971 struct dpif_flow *f = &flows[i];
1972 struct dp_netdev_actions *dp_actions;
1973 struct flow_wildcards wc;
1976 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1979 ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
1980 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1981 netdev_flow->flow.in_port.odp_port, true);
1982 f->key = ofpbuf_data(&buf);
1983 f->key_len = ofpbuf_size(&buf);
1986 ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
1987 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1988 odp_to_u32(wc.masks.in_port.odp_port),
1990 f->mask = ofpbuf_data(&buf);
1991 f->mask_len = ofpbuf_size(&buf);
1994 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1995 f->actions = dp_actions->actions;
1996 f->actions_len = dp_actions->size;
1999 get_dpif_flow_stats(netdev_flow, &f->stats);
2006 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
2007 OVS_NO_THREAD_SAFETY_ANALYSIS
2009 struct dp_netdev *dp = get_dp_netdev(dpif);
2010 struct dp_netdev_pmd_thread *pmd;
2011 struct dpif_packet packet, *pp;
2013 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
2014 ofpbuf_size(execute->packet) > UINT16_MAX) {
2018 packet.ofpbuf = *execute->packet;
2019 packet.md = execute->md;
2022 /* Tries finding the 'pmd'. If NULL is returned, that means
2023 * the current thread is a non-pmd thread and should use
2024 * dp_netdev_get_nonpmd(). */
2025 pmd = ovsthread_getspecific(dp->per_pmd_key);
2027 pmd = dp_netdev_get_nonpmd(dp);
2030 /* If the current thread is non-pmd thread, acquires
2031 * the 'non_pmd_mutex'. */
2032 if (pmd->core_id == NON_PMD_CORE_ID) {
2033 ovs_mutex_lock(&dp->non_pmd_mutex);
2035 dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
2036 execute->actions_len);
2037 if (pmd->core_id == NON_PMD_CORE_ID) {
2038 ovs_mutex_unlock(&dp->non_pmd_mutex);
2041 /* Even though may_steal is set to false, some actions could modify or
2042 * reallocate the ofpbuf memory. We need to pass those changes to the
2044 *execute->packet = packet.ofpbuf;
2045 execute->md = packet.md;
2050 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
2054 for (i = 0; i < n_ops; i++) {
2055 struct dpif_op *op = ops[i];
2058 case DPIF_OP_FLOW_PUT:
2059 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
2062 case DPIF_OP_FLOW_DEL:
2063 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
2066 case DPIF_OP_EXECUTE:
2067 op->error = dpif_netdev_execute(dpif, &op->u.execute);
2070 case DPIF_OP_FLOW_GET:
2071 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
2077 /* Returns true if the configuration for rx queues or cpu mask
2080 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
2082 if (dp->n_dpdk_rxqs != rxqs) {
2085 if (dp->pmd_cmask != NULL && cmask != NULL) {
2086 return strcmp(dp->pmd_cmask, cmask);
2088 return (dp->pmd_cmask != NULL || cmask != NULL);
2093 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2095 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
2097 struct dp_netdev *dp = get_dp_netdev(dpif);
2099 if (pmd_config_changed(dp, n_rxqs, cmask)) {
2100 struct dp_netdev_port *port;
2102 dp_netdev_destroy_all_pmds(dp);
2104 CMAP_FOR_EACH (port, node, &dp->ports) {
2105 if (netdev_is_pmd(port->netdev)) {
2108 /* Closes the existing 'rxq's. */
2109 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2110 netdev_rxq_close(port->rxq[i]);
2111 port->rxq[i] = NULL;
2114 /* Sets the new rx queue config. */
2115 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
2117 if (err && (err != EOPNOTSUPP)) {
2118 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2119 " %u", netdev_get_name(port->netdev),
2124 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2125 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
2126 * netdev_n_rxq(port->netdev));
2127 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2128 netdev_rxq_open(port->netdev, &port->rxq[i], i);
2132 dp->n_dpdk_rxqs = n_rxqs;
2134 /* Reconfigures the cpu mask. */
2135 ovs_numa_set_cpu_mask(cmask);
2136 free(dp->pmd_cmask);
2137 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
2139 /* Restores the non-pmd. */
2140 dp_netdev_set_nonpmd(dp);
2141 /* Restores all pmd threads. */
2142 dp_netdev_reset_pmd_threads(dp);
2149 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2150 uint32_t queue_id, uint32_t *priority)
2152 *priority = queue_id;
2157 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2158 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2160 struct dp_netdev_actions *
2161 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2163 struct dp_netdev_actions *netdev_actions;
2165 netdev_actions = xmalloc(sizeof *netdev_actions);
2166 netdev_actions->actions = xmemdup(actions, size);
2167 netdev_actions->size = size;
2169 return netdev_actions;
2172 struct dp_netdev_actions *
2173 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2175 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2179 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2181 free(actions->actions);
2187 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2188 struct dp_netdev_port *port,
2189 struct netdev_rxq *rxq)
2191 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2194 error = netdev_rxq_recv(rxq, packets, &cnt);
2198 *recirc_depth_get() = 0;
2200 /* XXX: initialize md in netdev implementation. */
2201 for (i = 0; i < cnt; i++) {
2202 packets[i]->md = PKT_METADATA_INITIALIZER(port->port_no);
2204 dp_netdev_input(pmd, packets, cnt);
2205 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2206 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2208 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2209 netdev_get_name(port->netdev), ovs_strerror(error));
2213 /* Return true if needs to revalidate datapath flows. */
2215 dpif_netdev_run(struct dpif *dpif)
2217 struct dp_netdev_port *port;
2218 struct dp_netdev *dp = get_dp_netdev(dpif);
2219 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_nonpmd(dp);
2220 uint64_t new_tnl_seq;
2222 ovs_mutex_lock(&dp->non_pmd_mutex);
2223 CMAP_FOR_EACH (port, node, &dp->ports) {
2224 if (!netdev_is_pmd(port->netdev)) {
2227 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2228 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2232 ovs_mutex_unlock(&dp->non_pmd_mutex);
2233 tnl_arp_cache_run();
2234 new_tnl_seq = seq_read(tnl_conf_seq);
2236 if (dp->last_tnl_conf_seq != new_tnl_seq) {
2237 dp->last_tnl_conf_seq = new_tnl_seq;
2244 dpif_netdev_wait(struct dpif *dpif)
2246 struct dp_netdev_port *port;
2247 struct dp_netdev *dp = get_dp_netdev(dpif);
2249 ovs_mutex_lock(&dp_netdev_mutex);
2250 CMAP_FOR_EACH (port, node, &dp->ports) {
2251 if (!netdev_is_pmd(port->netdev)) {
2254 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2255 netdev_rxq_wait(port->rxq[i]);
2259 ovs_mutex_unlock(&dp_netdev_mutex);
2260 seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
2264 struct dp_netdev_port *port;
2265 struct netdev_rxq *rx;
2269 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2270 struct rxq_poll **ppoll_list, int poll_cnt)
2272 struct rxq_poll *poll_list = *ppoll_list;
2273 struct dp_netdev_port *port;
2274 int n_pmds_on_numa, index, i;
2276 /* Simple scheduler for netdev rx polling. */
2277 for (i = 0; i < poll_cnt; i++) {
2278 port_unref(poll_list[i].port);
2282 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2285 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2286 /* Calls port_try_ref() to prevent the main thread
2287 * from deleting the port. */
2288 if (port_try_ref(port)) {
2289 if (netdev_is_pmd(port->netdev)
2290 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2293 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2294 if ((index % n_pmds_on_numa) == pmd->index) {
2295 poll_list = xrealloc(poll_list,
2296 sizeof *poll_list * (poll_cnt + 1));
2299 poll_list[poll_cnt].port = port;
2300 poll_list[poll_cnt].rx = port->rxq[i];
2306 /* Unrefs the port_try_ref(). */
2311 *ppoll_list = poll_list;
2316 pmd_thread_main(void *f_)
2318 struct dp_netdev_pmd_thread *pmd = f_;
2319 unsigned int lc = 0;
2320 struct rxq_poll *poll_list;
2321 unsigned int port_seq = PMD_INITIAL_SEQ;
2328 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2329 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2330 pmd_thread_setaffinity_cpu(pmd->core_id);
2332 emc_cache_init(&pmd->flow_cache);
2333 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2335 /* Signal here to make sure the pmd finishes
2336 * reloading the updated configuration. */
2337 dp_netdev_pmd_reload_done(pmd);
2342 for (i = 0; i < poll_cnt; i++) {
2343 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2351 emc_cache_slow_sweep(&pmd->flow_cache);
2354 atomic_read_relaxed(&pmd->change_seq, &seq);
2355 if (seq != port_seq) {
2362 emc_cache_uninit(&pmd->flow_cache);
2364 if (!latch_is_set(&pmd->exit_latch)){
2368 for (i = 0; i < poll_cnt; i++) {
2369 port_unref(poll_list[i].port);
2372 dp_netdev_pmd_reload_done(pmd);
2379 dp_netdev_disable_upcall(struct dp_netdev *dp)
2380 OVS_ACQUIRES(dp->upcall_rwlock)
2382 fat_rwlock_wrlock(&dp->upcall_rwlock);
2386 dpif_netdev_disable_upcall(struct dpif *dpif)
2387 OVS_NO_THREAD_SAFETY_ANALYSIS
2389 struct dp_netdev *dp = get_dp_netdev(dpif);
2390 dp_netdev_disable_upcall(dp);
2394 dp_netdev_enable_upcall(struct dp_netdev *dp)
2395 OVS_RELEASES(dp->upcall_rwlock)
2397 fat_rwlock_unlock(&dp->upcall_rwlock);
2401 dpif_netdev_enable_upcall(struct dpif *dpif)
2402 OVS_NO_THREAD_SAFETY_ANALYSIS
2404 struct dp_netdev *dp = get_dp_netdev(dpif);
2405 dp_netdev_enable_upcall(dp);
2409 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
2411 ovs_mutex_lock(&pmd->cond_mutex);
2412 xpthread_cond_signal(&pmd->cond);
2413 ovs_mutex_unlock(&pmd->cond_mutex);
2416 /* Returns the pointer to the dp_netdev_pmd_thread for non-pmd threads. */
2417 static struct dp_netdev_pmd_thread *
2418 dp_netdev_get_nonpmd(struct dp_netdev *dp)
2420 struct dp_netdev_pmd_thread *pmd;
2421 const struct cmap_node *pnode;
2423 pnode = cmap_find(&dp->poll_threads, hash_int(NON_PMD_CORE_ID, 0));
2425 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2430 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2432 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2434 struct dp_netdev_pmd_thread *non_pmd;
2436 non_pmd = xzalloc(sizeof *non_pmd);
2437 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2441 /* Configures the 'pmd' based on the input argument. */
2443 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2444 int index, int core_id, int numa_id)
2448 pmd->core_id = core_id;
2449 pmd->numa_id = numa_id;
2450 latch_init(&pmd->exit_latch);
2451 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2452 xpthread_cond_init(&pmd->cond, NULL);
2453 ovs_mutex_init(&pmd->cond_mutex);
2454 /* init the 'flow_cache' since there is no
2455 * actual thread created for NON_PMD_CORE_ID. */
2456 if (core_id == NON_PMD_CORE_ID) {
2457 emc_cache_init(&pmd->flow_cache);
2459 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2460 hash_int(core_id, 0));
2463 /* Stops the pmd thread, removes it from the 'dp->poll_threads'
2464 * and destroys the struct. */
2466 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2468 /* Uninit the 'flow_cache' since there is
2469 * no actual thread uninit it. */
2470 if (pmd->core_id == NON_PMD_CORE_ID) {
2471 emc_cache_uninit(&pmd->flow_cache);
2473 latch_set(&pmd->exit_latch);
2474 dp_netdev_reload_pmd__(pmd);
2475 ovs_numa_unpin_core(pmd->core_id);
2476 xpthread_join(pmd->thread, NULL);
2478 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2479 latch_destroy(&pmd->exit_latch);
2480 xpthread_cond_destroy(&pmd->cond);
2481 ovs_mutex_destroy(&pmd->cond_mutex);
2485 /* Destroys all pmd threads. */
2487 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2489 struct dp_netdev_pmd_thread *pmd;
2491 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2492 dp_netdev_del_pmd(pmd);
2496 /* Deletes all pmd threads on numa node 'numa_id'. */
2498 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2500 struct dp_netdev_pmd_thread *pmd;
2502 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2503 if (pmd->numa_id == numa_id) {
2504 dp_netdev_del_pmd(pmd);
2509 /* Checks the numa node id of 'netdev' and starts pmd threads for
2512 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2516 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2517 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2518 "invalid", numa_id);
2522 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2524 /* If there are already pmd threads created for the numa node
2525 * in which 'netdev' is on, do nothing. Else, creates the
2526 * pmd threads for the numa node. */
2528 int can_have, n_unpinned, i;
2530 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2532 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2533 "cores on numa node");
2537 /* If cpu mask is specified, uses all unpinned cores, otherwise
2538 * tries creating NR_PMD_THREADS pmd threads. */
2539 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2540 for (i = 0; i < can_have; i++) {
2541 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2542 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2544 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2545 /* Each thread will distribute all devices rx-queues among
2547 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2549 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2555 dp_netdev_flow_stats_new_cb(void)
2557 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2558 ovs_mutex_init(&bucket->mutex);
2562 /* Called after pmd threads config change. Restarts pmd threads with
2563 * new configuration. */
2565 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2567 struct dp_netdev_port *port;
2569 CMAP_FOR_EACH (port, node, &dp->ports) {
2570 if (netdev_is_pmd(port->netdev)) {
2571 int numa_id = netdev_get_numa_id(port->netdev);
2573 dp_netdev_set_pmds_on_numa(dp, numa_id);
2579 dpif_netdev_get_datapath_version(void)
2581 return xstrdup("<built-in>");
2585 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
2589 long long int now = time_msec();
2590 struct dp_netdev_flow_stats *bucket;
2592 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
2593 dp_netdev_flow_stats_new_cb);
2595 ovs_mutex_lock(&bucket->mutex);
2596 bucket->used = MAX(now, bucket->used);
2597 bucket->packet_count += cnt;
2598 bucket->byte_count += size;
2599 bucket->tcp_flags |= tcp_flags;
2600 ovs_mutex_unlock(&bucket->mutex);
2604 dp_netdev_stats_new_cb(void)
2606 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2607 ovs_mutex_init(&bucket->mutex);
2612 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
2614 struct dp_netdev_stats *bucket;
2616 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2617 ovs_mutex_lock(&bucket->mutex);
2618 bucket->n[type] += cnt;
2619 ovs_mutex_unlock(&bucket->mutex);
2623 dp_netdev_upcall(struct dp_netdev *dp, struct dpif_packet *packet_,
2624 struct flow *flow, struct flow_wildcards *wc,
2625 enum dpif_upcall_type type, const struct nlattr *userdata,
2626 struct ofpbuf *actions, struct ofpbuf *put_actions)
2628 struct ofpbuf *packet = &packet_->ofpbuf;
2630 if (type == DPIF_UC_MISS) {
2631 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2634 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2638 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2639 struct ds ds = DS_EMPTY_INITIALIZER;
2643 ofpbuf_init(&key, 0);
2644 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2647 packet_str = ofp_packet_to_string(ofpbuf_data(packet),
2648 ofpbuf_size(packet));
2650 odp_flow_key_format(ofpbuf_data(&key), ofpbuf_size(&key), &ds);
2652 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
2653 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
2655 ofpbuf_uninit(&key);
2660 return dp->upcall_cb(packet, flow, type, userdata, actions, wc,
2661 put_actions, dp->upcall_aux);
2664 static inline uint32_t
2665 dpif_netdev_packet_get_dp_hash(struct dpif_packet *packet,
2666 const struct miniflow *mf)
2670 hash = dpif_packet_get_dp_hash(packet);
2671 if (OVS_UNLIKELY(!hash)) {
2672 hash = miniflow_hash_5tuple(mf, 0);
2673 dpif_packet_set_dp_hash(packet, hash);
2678 struct packet_batch {
2679 unsigned int packet_count;
2680 unsigned int byte_count;
2683 struct dp_netdev_flow *flow;
2685 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2689 packet_batch_update(struct packet_batch *batch, struct dpif_packet *packet,
2690 const struct miniflow *mf)
2692 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2693 batch->packets[batch->packet_count++] = packet;
2694 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2698 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
2702 batch->packet_count = 0;
2703 batch->byte_count = 0;
2704 batch->tcp_flags = 0;
2708 packet_batch_execute(struct packet_batch *batch,
2709 struct dp_netdev_pmd_thread *pmd)
2711 struct dp_netdev_actions *actions;
2712 struct dp_netdev_flow *flow = batch->flow;
2714 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2717 actions = dp_netdev_flow_get_actions(flow);
2719 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
2720 actions->actions, actions->size);
2722 dp_netdev_count_packet(pmd->dp, DP_STAT_HIT, batch->packet_count);
2726 dp_netdev_queue_batches(struct dpif_packet *pkt,
2727 struct dp_netdev_flow *flow, const struct miniflow *mf,
2728 struct packet_batch *batches, size_t *n_batches,
2731 struct packet_batch *batch = NULL;
2734 if (OVS_UNLIKELY(!flow)) {
2737 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2738 * assumption that the number of distinct flows (and therefore the
2739 * number of distinct batches) is quite small. If this turns out not
2740 * to be the case, it may make sense to pre sort based on the
2741 * netdev_flow pointer. That done we can get the appropriate batching
2742 * in O(n * log(n)) instead. */
2743 for (j = *n_batches - 1; j >= 0; j--) {
2744 if (batches[j].flow == flow) {
2745 batch = &batches[j];
2746 packet_batch_update(batch, pkt, mf);
2750 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
2754 batch = &batches[(*n_batches)++];
2755 packet_batch_init(batch, flow);
2756 packet_batch_update(batch, pkt, mf);
2761 dpif_packet_swap(struct dpif_packet **a, struct dpif_packet **b)
2763 struct dpif_packet *tmp = *a;
2768 /* Try to process all ('cnt') the 'packets' using only the exact match cache
2769 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
2770 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
2771 * and the packet pointer is moved at the beginning of the 'packets' array.
2773 * The function returns the number of packets that needs to be processed in the
2774 * 'packets' array (they have been moved to the beginning of the vector).
2776 static inline size_t
2777 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dpif_packet **packets,
2778 size_t cnt, struct netdev_flow_key *keys)
2780 struct netdev_flow_key key;
2781 struct packet_batch batches[4];
2782 struct emc_cache *flow_cache = &pmd->flow_cache;
2783 size_t n_batches, i;
2784 size_t notfound_cnt = 0;
2787 miniflow_initialize(&key.mf, key.buf);
2788 for (i = 0; i < cnt; i++) {
2789 struct dp_netdev_flow *flow;
2791 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2792 dpif_packet_delete(packets[i]);
2796 miniflow_extract(&packets[i]->ofpbuf, &packets[i]->md, &key.mf);
2797 key.len = 0; /* Not computed yet. */
2798 key.hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.mf);
2800 flow = emc_lookup(flow_cache, &key);
2801 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], flow, &key.mf,
2802 batches, &n_batches,
2803 ARRAY_SIZE(batches)))) {
2804 if (i != notfound_cnt) {
2805 dpif_packet_swap(&packets[i], &packets[notfound_cnt]);
2808 keys[notfound_cnt++] = key;
2812 for (i = 0; i < n_batches; i++) {
2813 packet_batch_execute(&batches[i], pmd);
2816 return notfound_cnt;
2820 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
2821 struct dpif_packet **packets, size_t cnt,
2822 struct netdev_flow_key *keys)
2824 #if !defined(__CHECKER__) && !defined(_WIN32)
2825 const size_t PKT_ARRAY_SIZE = cnt;
2827 /* Sparse or MSVC doesn't like variable length array. */
2828 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2830 struct packet_batch batches[PKT_ARRAY_SIZE];
2831 struct dpcls_rule *rules[PKT_ARRAY_SIZE];
2832 struct dp_netdev *dp = pmd->dp;
2833 struct emc_cache *flow_cache = &pmd->flow_cache;
2834 size_t n_batches, i;
2837 for (i = 0; i < cnt; i++) {
2838 /* Key length is needed in all the cases, hash computed on demand. */
2839 keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
2841 any_miss = !dpcls_lookup(&dp->cls, keys, rules, cnt);
2842 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2843 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
2844 struct ofpbuf actions, put_actions;
2846 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
2847 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
2849 for (i = 0; i < cnt; i++) {
2850 struct dp_netdev_flow *netdev_flow;
2851 struct ofpbuf *add_actions;
2855 if (OVS_LIKELY(rules[i])) {
2859 /* It's possible that an earlier slow path execution installed
2860 * a rule covering this flow. In this case, it's a lot cheaper
2861 * to catch it here than execute a miss. */
2862 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2864 rules[i] = &netdev_flow->cr;
2868 miniflow_expand(&keys[i].mf, &match.flow);
2870 ofpbuf_clear(&actions);
2871 ofpbuf_clear(&put_actions);
2873 error = dp_netdev_upcall(dp, packets[i], &match.flow, &match.wc,
2874 DPIF_UC_MISS, NULL, &actions,
2876 if (OVS_UNLIKELY(error && error != ENOSPC)) {
2880 /* We can't allow the packet batching in the next loop to execute
2881 * the actions. Otherwise, if there are any slow path actions,
2882 * we'll send the packet up twice. */
2883 dp_netdev_execute_actions(pmd, &packets[i], 1, true,
2884 ofpbuf_data(&actions),
2885 ofpbuf_size(&actions));
2887 add_actions = ofpbuf_size(&put_actions)
2891 if (OVS_LIKELY(error != ENOSPC)) {
2892 /* XXX: There's a race window where a flow covering this packet
2893 * could have already been installed since we last did the flow
2894 * lookup before upcall. This could be solved by moving the
2895 * mutex lock outside the loop, but that's an awful long time
2896 * to be locking everyone out of making flow installs. If we
2897 * move to a per-core classifier, it would be reasonable. */
2898 ovs_mutex_lock(&dp->flow_mutex);
2899 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2900 if (OVS_LIKELY(!netdev_flow)) {
2901 netdev_flow = dp_netdev_flow_add(dp, &match,
2902 ofpbuf_data(add_actions),
2903 ofpbuf_size(add_actions));
2905 ovs_mutex_unlock(&dp->flow_mutex);
2907 emc_insert(flow_cache, &keys[i], netdev_flow);
2911 ofpbuf_uninit(&actions);
2912 ofpbuf_uninit(&put_actions);
2913 fat_rwlock_unlock(&dp->upcall_rwlock);
2914 } else if (OVS_UNLIKELY(any_miss)) {
2915 int dropped_cnt = 0;
2917 for (i = 0; i < cnt; i++) {
2918 if (OVS_UNLIKELY(!rules[i])) {
2919 dpif_packet_delete(packets[i]);
2924 dp_netdev_count_packet(dp, DP_STAT_LOST, dropped_cnt);
2928 for (i = 0; i < cnt; i++) {
2929 struct dpif_packet *packet = packets[i];
2930 struct dp_netdev_flow *flow;
2932 if (OVS_UNLIKELY(!rules[i])) {
2936 flow = dp_netdev_flow_cast(rules[i]);
2938 emc_insert(flow_cache, &keys[i], flow);
2939 dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches,
2940 &n_batches, ARRAY_SIZE(batches));
2943 for (i = 0; i < n_batches; i++) {
2944 packet_batch_execute(&batches[i], pmd);
2949 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
2950 struct dpif_packet **packets, int cnt)
2952 #if !defined(__CHECKER__) && !defined(_WIN32)
2953 const size_t PKT_ARRAY_SIZE = cnt;
2955 /* Sparse or MSVC doesn't like variable length array. */
2956 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2958 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
2961 newcnt = emc_processing(pmd, packets, cnt, keys);
2962 if (OVS_UNLIKELY(newcnt)) {
2963 fast_path_processing(pmd, packets, newcnt, keys);
2967 struct dp_netdev_execute_aux {
2968 struct dp_netdev_pmd_thread *pmd;
2972 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
2975 struct dp_netdev *dp = get_dp_netdev(dpif);
2976 dp->upcall_aux = aux;
2981 dp_netdev_drop_packets(struct dpif_packet ** packets, int cnt, bool may_steal)
2986 for (i = 0; i < cnt; i++) {
2987 dpif_packet_delete(packets[i]);
2993 push_tnl_action(const struct dp_netdev *dp,
2994 const struct nlattr *attr,
2995 struct dpif_packet **packets, int cnt)
2997 struct dp_netdev_port *tun_port;
2998 const struct ovs_action_push_tnl *data;
3000 data = nl_attr_get(attr);
3002 tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
3006 netdev_push_header(tun_port->netdev, packets, cnt, data);
3012 dp_netdev_clone_pkt_batch(struct dpif_packet **tnl_pkt,
3013 struct dpif_packet **packets, int cnt)
3017 for (i = 0; i < cnt; i++) {
3018 tnl_pkt[i] = dpif_packet_clone(packets[i]);
3023 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
3024 const struct nlattr *a, bool may_steal)
3025 OVS_NO_THREAD_SAFETY_ANALYSIS
3027 struct dp_netdev_execute_aux *aux = aux_;
3028 uint32_t *depth = recirc_depth_get();
3029 struct dp_netdev_pmd_thread *pmd= aux->pmd;
3030 struct dp_netdev *dp= pmd->dp;
3031 int type = nl_attr_type(a);
3032 struct dp_netdev_port *p;
3035 switch ((enum ovs_action_attr)type) {
3036 case OVS_ACTION_ATTR_OUTPUT:
3037 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
3038 if (OVS_LIKELY(p)) {
3039 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
3044 case OVS_ACTION_ATTR_TUNNEL_PUSH:
3045 if (*depth < MAX_RECIRC_DEPTH) {
3046 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3050 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3054 err = push_tnl_action(dp, a, packets, cnt);
3057 dp_netdev_input(pmd, packets, cnt);
3060 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3066 case OVS_ACTION_ATTR_TUNNEL_POP:
3067 if (*depth < MAX_RECIRC_DEPTH) {
3068 odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
3070 p = dp_netdev_lookup_port(dp, portno);
3072 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3076 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3080 err = netdev_pop_header(p->netdev, packets, cnt);
3083 for (i = 0; i < cnt; i++) {
3084 packets[i]->md.in_port.odp_port = portno;
3088 dp_netdev_input(pmd, packets, cnt);
3091 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3098 case OVS_ACTION_ATTR_USERSPACE:
3099 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3100 const struct nlattr *userdata;
3101 struct ofpbuf actions;
3104 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
3105 ofpbuf_init(&actions, 0);
3107 for (i = 0; i < cnt; i++) {
3110 ofpbuf_clear(&actions);
3112 flow_extract(&packets[i]->ofpbuf, &packets[i]->md, &flow);
3113 error = dp_netdev_upcall(dp, packets[i], &flow, NULL,
3114 DPIF_UC_ACTION, userdata, &actions,
3116 if (!error || error == ENOSPC) {
3117 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
3118 ofpbuf_data(&actions),
3119 ofpbuf_size(&actions));
3120 } else if (may_steal) {
3121 dpif_packet_delete(packets[i]);
3124 ofpbuf_uninit(&actions);
3125 fat_rwlock_unlock(&dp->upcall_rwlock);
3131 case OVS_ACTION_ATTR_RECIRC:
3132 if (*depth < MAX_RECIRC_DEPTH) {
3135 for (i = 0; i < cnt; i++) {
3136 struct dpif_packet *recirc_pkt;
3138 recirc_pkt = (may_steal) ? packets[i]
3139 : dpif_packet_clone(packets[i]);
3141 recirc_pkt->md.recirc_id = nl_attr_get_u32(a);
3143 /* Hash is private to each packet */
3144 recirc_pkt->md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
3146 dp_netdev_input(pmd, &recirc_pkt, 1);
3153 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3156 case OVS_ACTION_ATTR_PUSH_VLAN:
3157 case OVS_ACTION_ATTR_POP_VLAN:
3158 case OVS_ACTION_ATTR_PUSH_MPLS:
3159 case OVS_ACTION_ATTR_POP_MPLS:
3160 case OVS_ACTION_ATTR_SET:
3161 case OVS_ACTION_ATTR_SET_MASKED:
3162 case OVS_ACTION_ATTR_SAMPLE:
3163 case OVS_ACTION_ATTR_HASH:
3164 case OVS_ACTION_ATTR_UNSPEC:
3165 case __OVS_ACTION_ATTR_MAX:
3169 dp_netdev_drop_packets(packets, cnt, may_steal);
3173 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
3174 struct dpif_packet **packets, int cnt,
3176 const struct nlattr *actions, size_t actions_len)
3178 struct dp_netdev_execute_aux aux = { pmd };
3180 odp_execute_actions(&aux, packets, cnt, may_steal, actions,
3181 actions_len, dp_execute_cb);
3184 const struct dpif_class dpif_netdev_class = {
3186 dpif_netdev_enumerate,
3187 dpif_netdev_port_open_type,
3190 dpif_netdev_destroy,
3193 dpif_netdev_get_stats,
3194 dpif_netdev_port_add,
3195 dpif_netdev_port_del,
3196 dpif_netdev_port_query_by_number,
3197 dpif_netdev_port_query_by_name,
3198 NULL, /* port_get_pid */
3199 dpif_netdev_port_dump_start,
3200 dpif_netdev_port_dump_next,
3201 dpif_netdev_port_dump_done,
3202 dpif_netdev_port_poll,
3203 dpif_netdev_port_poll_wait,
3204 dpif_netdev_flow_flush,
3205 dpif_netdev_flow_dump_create,
3206 dpif_netdev_flow_dump_destroy,
3207 dpif_netdev_flow_dump_thread_create,
3208 dpif_netdev_flow_dump_thread_destroy,
3209 dpif_netdev_flow_dump_next,
3210 dpif_netdev_operate,
3211 NULL, /* recv_set */
3212 NULL, /* handlers_set */
3213 dpif_netdev_pmd_set,
3214 dpif_netdev_queue_to_priority,
3216 NULL, /* recv_wait */
3217 NULL, /* recv_purge */
3218 dpif_netdev_register_upcall_cb,
3219 dpif_netdev_enable_upcall,
3220 dpif_netdev_disable_upcall,
3221 dpif_netdev_get_datapath_version,
3225 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
3226 const char *argv[], void *aux OVS_UNUSED)
3228 struct dp_netdev_port *old_port;
3229 struct dp_netdev_port *new_port;
3230 struct dp_netdev *dp;
3233 ovs_mutex_lock(&dp_netdev_mutex);
3234 dp = shash_find_data(&dp_netdevs, argv[1]);
3235 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3236 ovs_mutex_unlock(&dp_netdev_mutex);
3237 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3240 ovs_refcount_ref(&dp->ref_cnt);
3241 ovs_mutex_unlock(&dp_netdev_mutex);
3243 ovs_mutex_lock(&dp->port_mutex);
3244 if (get_port_by_name(dp, argv[2], &old_port)) {
3245 unixctl_command_reply_error(conn, "unknown port");
3249 port_no = u32_to_odp(atoi(argv[3]));
3250 if (!port_no || port_no == ODPP_NONE) {
3251 unixctl_command_reply_error(conn, "bad port number");
3254 if (dp_netdev_lookup_port(dp, port_no)) {
3255 unixctl_command_reply_error(conn, "port number already in use");
3259 /* Remove old port. */
3260 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3261 ovsrcu_postpone(free, old_port);
3263 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3264 new_port = xmemdup(old_port, sizeof *old_port);
3265 new_port->port_no = port_no;
3266 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3268 seq_change(dp->port_seq);
3269 unixctl_command_reply(conn, NULL);
3272 ovs_mutex_unlock(&dp->port_mutex);
3273 dp_netdev_unref(dp);
3277 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3278 const char *argv[], void *aux OVS_UNUSED)
3280 struct dp_netdev_port *port;
3281 struct dp_netdev *dp;
3283 ovs_mutex_lock(&dp_netdev_mutex);
3284 dp = shash_find_data(&dp_netdevs, argv[1]);
3285 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3286 ovs_mutex_unlock(&dp_netdev_mutex);
3287 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3290 ovs_refcount_ref(&dp->ref_cnt);
3291 ovs_mutex_unlock(&dp_netdev_mutex);
3293 ovs_mutex_lock(&dp->port_mutex);
3294 if (get_port_by_name(dp, argv[2], &port)) {
3295 unixctl_command_reply_error(conn, "unknown port");
3296 } else if (port->port_no == ODPP_LOCAL) {
3297 unixctl_command_reply_error(conn, "can't delete local port");
3299 do_del_port(dp, port);
3300 unixctl_command_reply(conn, NULL);
3302 ovs_mutex_unlock(&dp->port_mutex);
3304 dp_netdev_unref(dp);
3308 dpif_dummy_register__(const char *type)
3310 struct dpif_class *class;
3312 class = xmalloc(sizeof *class);
3313 *class = dpif_netdev_class;
3314 class->type = xstrdup(type);
3315 dp_register_provider(class);
3319 dpif_dummy_register(bool override)
3326 dp_enumerate_types(&types);
3327 SSET_FOR_EACH (type, &types) {
3328 if (!dp_unregister_provider(type)) {
3329 dpif_dummy_register__(type);
3332 sset_destroy(&types);
3335 dpif_dummy_register__("dummy");
3337 unixctl_command_register("dpif-dummy/change-port-number",
3338 "dp port new-number",
3339 3, 3, dpif_dummy_change_port_number, NULL);
3340 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3341 2, 2, dpif_dummy_delete_port, NULL);
3344 /* Datapath Classifier. */
3346 /* A set of rules that all have the same fields wildcarded. */
3347 struct dpcls_subtable {
3348 /* The fields are only used by writers. */
3349 struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
3351 /* These fields are accessed by readers. */
3352 struct cmap rules; /* Contains "struct dpcls_rule"s. */
3353 struct netdev_flow_key mask; /* Wildcards for fields (const). */
3354 /* 'mask' must be the last field, additional space is allocated here. */
3357 /* Initializes 'cls' as a classifier that initially contains no classification
3360 dpcls_init(struct dpcls *cls)
3362 cmap_init(&cls->subtables_map);
3363 pvector_init(&cls->subtables);
3367 dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
3369 pvector_remove(&cls->subtables, subtable);
3370 cmap_remove(&cls->subtables_map, &subtable->cmap_node,
3371 subtable->mask.hash);
3372 cmap_destroy(&subtable->rules);
3373 ovsrcu_postpone(free, subtable);
3376 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
3377 * caller's responsibility.
3378 * May only be called after all the readers have been terminated. */
3380 dpcls_destroy(struct dpcls *cls)
3383 struct dpcls_subtable *subtable;
3385 CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
3386 dpcls_destroy_subtable(cls, subtable);
3388 cmap_destroy(&cls->subtables_map);
3389 pvector_destroy(&cls->subtables);
3393 static struct dpcls_subtable *
3394 dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3396 struct dpcls_subtable *subtable;
3398 /* Need to add one. */
3399 subtable = xmalloc(sizeof *subtable
3400 - sizeof subtable->mask.mf + mask->len);
3401 cmap_init(&subtable->rules);
3402 netdev_flow_key_clone(&subtable->mask, mask);
3403 cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
3404 pvector_insert(&cls->subtables, subtable, 0);
3405 pvector_publish(&cls->subtables);
3410 static inline struct dpcls_subtable *
3411 dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3413 struct dpcls_subtable *subtable;
3415 CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
3416 &cls->subtables_map) {
3417 if (netdev_flow_key_equal(&subtable->mask, mask)) {
3421 return dpcls_create_subtable(cls, mask);
3424 /* Insert 'rule' into 'cls'. */
3426 dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
3427 const struct netdev_flow_key *mask)
3429 struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
3431 rule->mask = &subtable->mask;
3432 cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
3435 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
3437 dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
3439 struct dpcls_subtable *subtable;
3441 ovs_assert(rule->mask);
3443 INIT_CONTAINER(subtable, rule->mask, mask);
3445 if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
3447 dpcls_destroy_subtable(cls, subtable);
3448 pvector_publish(&cls->subtables);
3452 /* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
3453 * in 'mask' the values in 'key' and 'target' are the same.
3455 * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
3457 dpcls_rule_matches_key(const struct dpcls_rule *rule,
3458 const struct netdev_flow_key *target)
3460 const uint32_t *keyp = rule->flow.mf.inline_values;
3461 const uint32_t *maskp = rule->mask->mf.inline_values;
3462 uint32_t target_u32;
3464 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u32, target, rule->flow.mf.map) {
3465 if (OVS_UNLIKELY((target_u32 & *maskp++) != *keyp++)) {
3472 /* For each miniflow in 'flows' performs a classifier lookup writing the result
3473 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
3474 * NULL it is skipped.
3476 * This function is optimized for use in the userspace datapath and therefore
3477 * does not implement a lot of features available in the standard
3478 * classifier_lookup() function. Specifically, it does not implement
3479 * priorities, instead returning any rule which matches the flow.
3481 * Returns true if all flows found a corresponding rule. */
3483 dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
3484 struct dpcls_rule **rules, const size_t cnt)
3486 /* The batch size 16 was experimentally found faster than 8 or 32. */
3487 typedef uint16_t map_type;
3488 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
3490 #if !defined(__CHECKER__) && !defined(_WIN32)
3491 const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
3493 enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_RX_BATCH, MAP_BITS) };
3495 map_type maps[N_MAPS];
3496 struct dpcls_subtable *subtable;
3498 memset(maps, 0xff, sizeof maps);
3499 if (cnt % MAP_BITS) {
3500 maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
3502 memset(rules, 0, cnt * sizeof *rules);
3504 PVECTOR_FOR_EACH (subtable, &cls->subtables) {
3505 const struct netdev_flow_key *mkeys = keys;
3506 struct dpcls_rule **mrules = rules;
3507 map_type remains = 0;
3510 BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
3512 for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
3513 uint32_t hashes[MAP_BITS];
3514 const struct cmap_node *nodes[MAP_BITS];
3515 unsigned long map = maps[m];
3519 continue; /* Skip empty maps. */
3522 /* Compute hashes for the remaining keys. */
3523 ULONG_FOR_EACH_1(i, map) {
3524 hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
3528 map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
3529 /* Check results. */
3530 ULONG_FOR_EACH_1(i, map) {
3531 struct dpcls_rule *rule;
3533 CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
3534 if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
3539 ULONG_SET0(map, i); /* Did not match. */
3541 ; /* Keep Sparse happy. */
3543 maps[m] &= ~map; /* Clear the found rules. */
3547 return true; /* All found. */
3550 return false; /* Some misses. */