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 ovs_u128 ufid; /* Unique flow identifier. */
308 const struct flow flow; /* Unmasked flow that created this entry. */
310 /* Number of references.
311 * The classifier owns one reference.
312 * Any thread trying to keep a rule from being freed should hold its own
314 struct ovs_refcount ref_cnt;
318 * Reading or writing these members requires 'mutex'. */
319 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
322 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
324 /* Packet classification. */
325 struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
326 /* 'cr' must be the last member. */
329 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
330 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
331 static int dpif_netdev_flow_from_nlattrs(const struct nlattr *, uint32_t,
334 /* Contained by struct dp_netdev_flow's 'stats' member. */
335 struct dp_netdev_flow_stats {
336 struct ovs_mutex mutex; /* Guards all the other members. */
338 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
339 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
340 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
341 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
344 /* A set of datapath actions within a "struct dp_netdev_flow".
350 * A struct dp_netdev_actions 'actions' is protected with RCU. */
351 struct dp_netdev_actions {
352 /* These members are immutable: they do not change during the struct's
354 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
355 unsigned int size; /* Size of 'actions', in bytes. */
358 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
360 struct dp_netdev_actions *dp_netdev_flow_get_actions(
361 const struct dp_netdev_flow *);
362 static void dp_netdev_actions_free(struct dp_netdev_actions *);
364 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
365 * the performance overhead of interrupt processing. Therefore netdev can
366 * not implement rx-wait for these devices. dpif-netdev needs to poll
367 * these device to check for recv buffer. pmd-thread does polling for
368 * devices assigned to itself thread.
370 * DPDK used PMD for accessing NIC.
372 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
373 * I/O of all non-pmd threads. There will be no actual thread created
376 struct dp_netdev_pmd_thread {
377 struct dp_netdev *dp;
378 struct cmap_node node; /* In 'dp->poll_threads'. */
380 pthread_cond_t cond; /* For synchronizing pmd thread reload. */
381 struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
383 /* Per thread exact-match cache. Note, the instance for cpu core
384 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
385 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
386 * instances will only be accessed by its own pmd thread. */
387 struct emc_cache flow_cache;
388 struct latch exit_latch; /* For terminating the pmd thread. */
389 atomic_uint change_seq; /* For reloading pmd ports. */
391 int index; /* Idx of this pmd thread among pmd*/
392 /* threads on same numa node. */
393 int core_id; /* CPU core id of this pmd thread. */
394 int numa_id; /* numa node id of this pmd thread. */
397 #define PMD_INITIAL_SEQ 1
399 /* Interface to netdev-based datapath. */
402 struct dp_netdev *dp;
403 uint64_t last_port_seq;
406 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
407 struct dp_netdev_port **portp);
408 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
409 struct dp_netdev_port **portp);
410 static void dp_netdev_free(struct dp_netdev *)
411 OVS_REQUIRES(dp_netdev_mutex);
412 static void dp_netdev_flow_flush(struct dp_netdev *);
413 static int do_add_port(struct dp_netdev *dp, const char *devname,
414 const char *type, odp_port_t port_no)
415 OVS_REQUIRES(dp->port_mutex);
416 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
417 OVS_REQUIRES(dp->port_mutex);
418 static int dpif_netdev_open(const struct dpif_class *, const char *name,
419 bool create, struct dpif **);
420 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
421 struct dpif_packet **, int c,
423 const struct nlattr *actions,
425 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
426 struct dpif_packet **, int cnt);
428 static void dp_netdev_disable_upcall(struct dp_netdev *);
429 void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
430 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
431 struct dp_netdev *dp, int index,
432 int core_id, int numa_id);
433 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
434 static struct dp_netdev_pmd_thread *dp_netdev_get_nonpmd(struct dp_netdev *dp);
435 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
436 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
437 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
438 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
440 static inline bool emc_entry_alive(struct emc_entry *ce);
441 static void emc_clear_entry(struct emc_entry *ce);
444 emc_cache_init(struct emc_cache *flow_cache)
448 BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
450 flow_cache->sweep_idx = 0;
451 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
452 flow_cache->entries[i].flow = NULL;
453 flow_cache->entries[i].key.hash = 0;
454 flow_cache->entries[i].key.len
455 = offsetof(struct miniflow, inline_values);
456 miniflow_initialize(&flow_cache->entries[i].key.mf,
457 flow_cache->entries[i].key.buf);
462 emc_cache_uninit(struct emc_cache *flow_cache)
466 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
467 emc_clear_entry(&flow_cache->entries[i]);
471 /* Check and clear dead flow references slowly (one entry at each
474 emc_cache_slow_sweep(struct emc_cache *flow_cache)
476 struct emc_entry *entry = &flow_cache->entries[flow_cache->sweep_idx];
478 if (!emc_entry_alive(entry)) {
479 emc_clear_entry(entry);
481 flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
484 static struct dpif_netdev *
485 dpif_netdev_cast(const struct dpif *dpif)
487 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
488 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
491 static struct dp_netdev *
492 get_dp_netdev(const struct dpif *dpif)
494 return dpif_netdev_cast(dpif)->dp;
498 dpif_netdev_enumerate(struct sset *all_dps,
499 const struct dpif_class *dpif_class)
501 struct shash_node *node;
503 ovs_mutex_lock(&dp_netdev_mutex);
504 SHASH_FOR_EACH(node, &dp_netdevs) {
505 struct dp_netdev *dp = node->data;
506 if (dpif_class != dp->class) {
507 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
508 * If the class doesn't match, skip this dpif. */
511 sset_add(all_dps, node->name);
513 ovs_mutex_unlock(&dp_netdev_mutex);
519 dpif_netdev_class_is_dummy(const struct dpif_class *class)
521 return class != &dpif_netdev_class;
525 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
527 return strcmp(type, "internal") ? type
528 : dpif_netdev_class_is_dummy(class) ? "dummy"
533 create_dpif_netdev(struct dp_netdev *dp)
535 uint16_t netflow_id = hash_string(dp->name, 0);
536 struct dpif_netdev *dpif;
538 ovs_refcount_ref(&dp->ref_cnt);
540 dpif = xmalloc(sizeof *dpif);
541 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
543 dpif->last_port_seq = seq_read(dp->port_seq);
548 /* Choose an unused, non-zero port number and return it on success.
549 * Return ODPP_NONE on failure. */
551 choose_port(struct dp_netdev *dp, const char *name)
552 OVS_REQUIRES(dp->port_mutex)
556 if (dp->class != &dpif_netdev_class) {
560 /* If the port name begins with "br", start the number search at
561 * 100 to make writing tests easier. */
562 if (!strncmp(name, "br", 2)) {
566 /* If the port name contains a number, try to assign that port number.
567 * This can make writing unit tests easier because port numbers are
569 for (p = name; *p != '\0'; p++) {
570 if (isdigit((unsigned char) *p)) {
571 port_no = start_no + strtol(p, NULL, 10);
572 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
573 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
574 return u32_to_odp(port_no);
581 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
582 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
583 return u32_to_odp(port_no);
591 create_dp_netdev(const char *name, const struct dpif_class *class,
592 struct dp_netdev **dpp)
593 OVS_REQUIRES(dp_netdev_mutex)
595 struct dp_netdev *dp;
598 dp = xzalloc(sizeof *dp);
599 shash_add(&dp_netdevs, name, dp);
601 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
602 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
603 ovs_refcount_init(&dp->ref_cnt);
604 atomic_flag_clear(&dp->destroyed);
606 ovs_mutex_init(&dp->flow_mutex);
607 dpcls_init(&dp->cls);
608 cmap_init(&dp->flow_table);
610 ovsthread_stats_init(&dp->stats);
612 ovs_mutex_init(&dp->port_mutex);
613 cmap_init(&dp->ports);
614 dp->port_seq = seq_create();
615 fat_rwlock_init(&dp->upcall_rwlock);
617 /* Disable upcalls by default. */
618 dp_netdev_disable_upcall(dp);
619 dp->upcall_aux = NULL;
620 dp->upcall_cb = NULL;
622 cmap_init(&dp->poll_threads);
623 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
624 ovsthread_key_create(&dp->per_pmd_key, NULL);
626 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
627 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
628 dp_netdev_set_nonpmd(dp);
629 dp->n_dpdk_rxqs = NR_QUEUE;
631 ovs_mutex_lock(&dp->port_mutex);
632 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
633 ovs_mutex_unlock(&dp->port_mutex);
639 dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
645 dpif_netdev_open(const struct dpif_class *class, const char *name,
646 bool create, struct dpif **dpifp)
648 struct dp_netdev *dp;
651 ovs_mutex_lock(&dp_netdev_mutex);
652 dp = shash_find_data(&dp_netdevs, name);
654 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
656 error = (dp->class != class ? EINVAL
661 *dpifp = create_dpif_netdev(dp);
664 ovs_mutex_unlock(&dp_netdev_mutex);
670 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
671 OVS_NO_THREAD_SAFETY_ANALYSIS
673 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
674 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
676 /* Before freeing a lock we should release it */
677 fat_rwlock_unlock(&dp->upcall_rwlock);
678 fat_rwlock_destroy(&dp->upcall_rwlock);
681 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
682 * through the 'dp_netdevs' shash while freeing 'dp'. */
684 dp_netdev_free(struct dp_netdev *dp)
685 OVS_REQUIRES(dp_netdev_mutex)
687 struct dp_netdev_port *port;
688 struct dp_netdev_stats *bucket;
691 shash_find_and_delete(&dp_netdevs, dp->name);
693 dp_netdev_destroy_all_pmds(dp);
694 cmap_destroy(&dp->poll_threads);
695 ovs_mutex_destroy(&dp->non_pmd_mutex);
696 ovsthread_key_delete(dp->per_pmd_key);
698 dp_netdev_flow_flush(dp);
699 ovs_mutex_lock(&dp->port_mutex);
700 CMAP_FOR_EACH (port, node, &dp->ports) {
701 do_del_port(dp, port);
703 ovs_mutex_unlock(&dp->port_mutex);
705 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
706 ovs_mutex_destroy(&bucket->mutex);
707 free_cacheline(bucket);
709 ovsthread_stats_destroy(&dp->stats);
711 dpcls_destroy(&dp->cls);
712 cmap_destroy(&dp->flow_table);
713 ovs_mutex_destroy(&dp->flow_mutex);
714 seq_destroy(dp->port_seq);
715 cmap_destroy(&dp->ports);
717 /* Upcalls must be disabled at this point */
718 dp_netdev_destroy_upcall_lock(dp);
721 free(CONST_CAST(char *, dp->name));
726 dp_netdev_unref(struct dp_netdev *dp)
729 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
730 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
731 ovs_mutex_lock(&dp_netdev_mutex);
732 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
735 ovs_mutex_unlock(&dp_netdev_mutex);
740 dpif_netdev_close(struct dpif *dpif)
742 struct dp_netdev *dp = get_dp_netdev(dpif);
749 dpif_netdev_destroy(struct dpif *dpif)
751 struct dp_netdev *dp = get_dp_netdev(dpif);
753 if (!atomic_flag_test_and_set(&dp->destroyed)) {
754 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
755 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
764 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
766 struct dp_netdev *dp = get_dp_netdev(dpif);
767 struct dp_netdev_stats *bucket;
770 stats->n_flows = cmap_count(&dp->flow_table);
772 stats->n_hit = stats->n_missed = stats->n_lost = 0;
773 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
774 ovs_mutex_lock(&bucket->mutex);
775 stats->n_hit += bucket->n[DP_STAT_HIT];
776 stats->n_missed += bucket->n[DP_STAT_MISS];
777 stats->n_lost += bucket->n[DP_STAT_LOST];
778 ovs_mutex_unlock(&bucket->mutex);
780 stats->n_masks = UINT32_MAX;
781 stats->n_mask_hit = UINT64_MAX;
787 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
791 if (pmd->core_id == NON_PMD_CORE_ID) {
795 ovs_mutex_lock(&pmd->cond_mutex);
796 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
797 ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
798 ovs_mutex_unlock(&pmd->cond_mutex);
801 /* Causes all pmd threads to reload its tx/rx devices.
802 * Must be called after adding/removing ports. */
804 dp_netdev_reload_pmds(struct dp_netdev *dp)
806 struct dp_netdev_pmd_thread *pmd;
808 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
809 dp_netdev_reload_pmd__(pmd);
814 hash_port_no(odp_port_t port_no)
816 return hash_int(odp_to_u32(port_no), 0);
820 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
822 OVS_REQUIRES(dp->port_mutex)
824 struct netdev_saved_flags *sf;
825 struct dp_netdev_port *port;
826 struct netdev *netdev;
827 enum netdev_flags flags;
828 const char *open_type;
832 /* XXX reject devices already in some dp_netdev. */
834 /* Open and validate network device. */
835 open_type = dpif_netdev_port_open_type(dp->class, type);
836 error = netdev_open(devname, open_type, &netdev);
840 /* XXX reject non-Ethernet devices */
842 netdev_get_flags(netdev, &flags);
843 if (flags & NETDEV_LOOPBACK) {
844 VLOG_ERR("%s: cannot add a loopback device", devname);
845 netdev_close(netdev);
849 if (netdev_is_pmd(netdev)) {
850 int n_cores = ovs_numa_get_n_cores();
852 if (n_cores == OVS_CORE_UNSPEC) {
853 VLOG_ERR("%s, cannot get cpu core info", devname);
856 /* There can only be ovs_numa_get_n_cores() pmd threads,
857 * so creates a txq for each. */
858 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
859 if (error && (error != EOPNOTSUPP)) {
860 VLOG_ERR("%s, cannot set multiq", devname);
864 port = xzalloc(sizeof *port);
865 port->port_no = port_no;
866 port->netdev = netdev;
867 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
868 port->type = xstrdup(type);
869 for (i = 0; i < netdev_n_rxq(netdev); i++) {
870 error = netdev_rxq_open(netdev, &port->rxq[i], i);
872 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
873 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
874 devname, ovs_strerror(errno));
875 netdev_close(netdev);
883 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
885 for (i = 0; i < netdev_n_rxq(netdev); i++) {
886 netdev_rxq_close(port->rxq[i]);
888 netdev_close(netdev);
896 ovs_refcount_init(&port->ref_cnt);
897 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
899 if (netdev_is_pmd(netdev)) {
900 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
901 dp_netdev_reload_pmds(dp);
903 seq_change(dp->port_seq);
909 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
910 odp_port_t *port_nop)
912 struct dp_netdev *dp = get_dp_netdev(dpif);
913 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
914 const char *dpif_port;
918 ovs_mutex_lock(&dp->port_mutex);
919 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
920 if (*port_nop != ODPP_NONE) {
922 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
924 port_no = choose_port(dp, dpif_port);
925 error = port_no == ODPP_NONE ? EFBIG : 0;
929 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
931 ovs_mutex_unlock(&dp->port_mutex);
937 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
939 struct dp_netdev *dp = get_dp_netdev(dpif);
942 ovs_mutex_lock(&dp->port_mutex);
943 if (port_no == ODPP_LOCAL) {
946 struct dp_netdev_port *port;
948 error = get_port_by_number(dp, port_no, &port);
950 do_del_port(dp, port);
953 ovs_mutex_unlock(&dp->port_mutex);
959 is_valid_port_number(odp_port_t port_no)
961 return port_no != ODPP_NONE;
964 static struct dp_netdev_port *
965 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
967 struct dp_netdev_port *port;
969 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
970 if (port->port_no == port_no) {
978 get_port_by_number(struct dp_netdev *dp,
979 odp_port_t port_no, struct dp_netdev_port **portp)
981 if (!is_valid_port_number(port_no)) {
985 *portp = dp_netdev_lookup_port(dp, port_no);
986 return *portp ? 0 : ENOENT;
991 port_ref(struct dp_netdev_port *port)
994 ovs_refcount_ref(&port->ref_cnt);
999 port_try_ref(struct dp_netdev_port *port)
1002 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
1009 port_unref(struct dp_netdev_port *port)
1011 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
1012 int n_rxq = netdev_n_rxq(port->netdev);
1015 netdev_close(port->netdev);
1016 netdev_restore_flags(port->sf);
1018 for (i = 0; i < n_rxq; i++) {
1019 netdev_rxq_close(port->rxq[i]);
1028 get_port_by_name(struct dp_netdev *dp,
1029 const char *devname, struct dp_netdev_port **portp)
1030 OVS_REQUIRES(dp->port_mutex)
1032 struct dp_netdev_port *port;
1034 CMAP_FOR_EACH (port, node, &dp->ports) {
1035 if (!strcmp(netdev_get_name(port->netdev), devname)) {
1044 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
1046 struct dp_netdev_pmd_thread *pmd;
1049 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1050 if (pmd->numa_id == numa_id) {
1058 /* Returns 'true' if there is a port with pmd netdev and the netdev
1059 * is on numa node 'numa_id'. */
1061 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1063 struct dp_netdev_port *port;
1065 CMAP_FOR_EACH (port, node, &dp->ports) {
1066 if (netdev_is_pmd(port->netdev)
1067 && netdev_get_numa_id(port->netdev) == numa_id) {
1077 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1078 OVS_REQUIRES(dp->port_mutex)
1080 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1081 seq_change(dp->port_seq);
1082 if (netdev_is_pmd(port->netdev)) {
1083 int numa_id = netdev_get_numa_id(port->netdev);
1085 /* If there is no netdev on the numa node, deletes the pmd threads
1086 * for that numa. Else, just reloads the queues. */
1087 if (!has_pmd_port_for_numa(dp, numa_id)) {
1088 dp_netdev_del_pmds_on_numa(dp, numa_id);
1090 dp_netdev_reload_pmds(dp);
1097 answer_port_query(const struct dp_netdev_port *port,
1098 struct dpif_port *dpif_port)
1100 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1101 dpif_port->type = xstrdup(port->type);
1102 dpif_port->port_no = port->port_no;
1106 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1107 struct dpif_port *dpif_port)
1109 struct dp_netdev *dp = get_dp_netdev(dpif);
1110 struct dp_netdev_port *port;
1113 error = get_port_by_number(dp, port_no, &port);
1114 if (!error && dpif_port) {
1115 answer_port_query(port, dpif_port);
1122 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1123 struct dpif_port *dpif_port)
1125 struct dp_netdev *dp = get_dp_netdev(dpif);
1126 struct dp_netdev_port *port;
1129 ovs_mutex_lock(&dp->port_mutex);
1130 error = get_port_by_name(dp, devname, &port);
1131 if (!error && dpif_port) {
1132 answer_port_query(port, dpif_port);
1134 ovs_mutex_unlock(&dp->port_mutex);
1140 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1142 struct dp_netdev_flow_stats *bucket;
1145 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
1146 ovs_mutex_destroy(&bucket->mutex);
1147 free_cacheline(bucket);
1149 ovsthread_stats_destroy(&flow->stats);
1151 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1155 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1157 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1158 ovsrcu_postpone(dp_netdev_flow_free, flow);
1163 dp_netdev_flow_hash(const ovs_u128 *ufid)
1165 return ufid->u32[0];
1169 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
1170 OVS_REQUIRES(dp->flow_mutex)
1172 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1174 dpcls_remove(&dp->cls, &flow->cr);
1175 cmap_remove(&dp->flow_table, node, dp_netdev_flow_hash(&flow->ufid));
1178 dp_netdev_flow_unref(flow);
1182 dp_netdev_flow_flush(struct dp_netdev *dp)
1184 struct dp_netdev_flow *netdev_flow;
1186 ovs_mutex_lock(&dp->flow_mutex);
1187 CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
1188 dp_netdev_remove_flow(dp, netdev_flow);
1190 ovs_mutex_unlock(&dp->flow_mutex);
1194 dpif_netdev_flow_flush(struct dpif *dpif)
1196 struct dp_netdev *dp = get_dp_netdev(dpif);
1198 dp_netdev_flow_flush(dp);
1202 struct dp_netdev_port_state {
1203 struct cmap_position position;
1208 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1210 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1215 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1216 struct dpif_port *dpif_port)
1218 struct dp_netdev_port_state *state = state_;
1219 struct dp_netdev *dp = get_dp_netdev(dpif);
1220 struct cmap_node *node;
1223 node = cmap_next_position(&dp->ports, &state->position);
1225 struct dp_netdev_port *port;
1227 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1230 state->name = xstrdup(netdev_get_name(port->netdev));
1231 dpif_port->name = state->name;
1232 dpif_port->type = port->type;
1233 dpif_port->port_no = port->port_no;
1244 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1246 struct dp_netdev_port_state *state = state_;
1253 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1255 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1256 uint64_t new_port_seq;
1259 new_port_seq = seq_read(dpif->dp->port_seq);
1260 if (dpif->last_port_seq != new_port_seq) {
1261 dpif->last_port_seq = new_port_seq;
1271 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1273 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1275 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1278 static struct dp_netdev_flow *
1279 dp_netdev_flow_cast(const struct dpcls_rule *cr)
1281 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1284 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1286 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1289 /* netdev_flow_key utilities.
1291 * netdev_flow_key is basically a miniflow. We use these functions
1292 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1293 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1295 * - Since we are dealing exclusively with miniflows created by
1296 * miniflow_extract(), if the map is different the miniflow is different.
1297 * Therefore we can be faster by comparing the map and the miniflow in a
1299 * _ netdev_flow_key's miniflow has always inline values.
1300 * - These functions can be inlined by the compiler.
1302 * The following assertions make sure that what we're doing with miniflow is
1305 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1306 == sizeof(uint64_t));
1308 /* Given the number of bits set in the miniflow map, returns the size of the
1309 * 'netdev_flow_key.mf' */
1310 static inline uint32_t
1311 netdev_flow_key_size(uint32_t flow_u32s)
1313 return offsetof(struct miniflow, inline_values) +
1314 MINIFLOW_VALUES_SIZE(flow_u32s);
1318 netdev_flow_key_equal(const struct netdev_flow_key *a,
1319 const struct netdev_flow_key *b)
1321 /* 'b->len' may be not set yet. */
1322 return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
1325 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1326 * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
1327 * generated by miniflow_extract. */
1329 netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
1330 const struct miniflow *mf)
1332 return !memcmp(&key->mf, mf, key->len);
1336 netdev_flow_key_clone(struct netdev_flow_key *dst,
1337 const struct netdev_flow_key *src)
1340 offsetof(struct netdev_flow_key, mf) + src->len);
1345 netdev_flow_key_from_flow(struct netdev_flow_key *dst,
1346 const struct flow *src)
1348 struct ofpbuf packet;
1349 uint64_t buf_stub[512 / 8];
1350 struct pkt_metadata md = pkt_metadata_from_flow(src);
1352 miniflow_initialize(&dst->mf, dst->buf);
1354 ofpbuf_use_stub(&packet, buf_stub, sizeof buf_stub);
1355 flow_compose(&packet, src);
1356 miniflow_extract(&packet, &md, &dst->mf);
1357 ofpbuf_uninit(&packet);
1359 dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
1360 dst->hash = 0; /* Not computed yet. */
1363 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1365 netdev_flow_mask_init(struct netdev_flow_key *mask,
1366 const struct match *match)
1368 const uint32_t *mask_u32 = (const uint32_t *) &match->wc.masks;
1369 uint32_t *dst = mask->mf.inline_values;
1370 uint64_t map, mask_map = 0;
1374 /* Only check masks that make sense for the flow. */
1375 map = flow_wc_map(&match->flow);
1378 uint64_t rm1bit = rightmost_1bit(map);
1379 int i = raw_ctz(map);
1383 *dst++ = mask_u32[i];
1384 hash = hash_add(hash, mask_u32[i]);
1389 mask->mf.values_inline = true;
1390 mask->mf.map = mask_map;
1392 hash = hash_add(hash, mask_map);
1393 hash = hash_add(hash, mask_map >> 32);
1395 n = dst - mask->mf.inline_values;
1397 mask->hash = hash_finish(hash, n * 4);
1398 mask->len = netdev_flow_key_size(n);
1401 /* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
1403 netdev_flow_key_init_masked(struct netdev_flow_key *dst,
1404 const struct flow *flow,
1405 const struct netdev_flow_key *mask)
1407 uint32_t *dst_u32 = dst->mf.inline_values;
1408 const uint32_t *mask_u32 = mask->mf.inline_values;
1412 dst->len = mask->len;
1413 dst->mf.values_inline = true;
1414 dst->mf.map = mask->mf.map;
1416 FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
1417 *dst_u32 = value & *mask_u32++;
1418 hash = hash_add(hash, *dst_u32++);
1420 dst->hash = hash_finish(hash, (dst_u32 - dst->mf.inline_values) * 4);
1423 /* Iterate through all netdev_flow_key u32 values specified by 'MAP' */
1424 #define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
1425 for (struct mf_for_each_in_map_aux aux__ \
1426 = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
1427 mf_get_next_in_map(&aux__, &(VALUE)); \
1430 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1432 static inline uint32_t
1433 netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
1434 const struct netdev_flow_key *mask)
1436 const uint32_t *p = mask->mf.inline_values;
1440 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u32, key, mask->mf.map) {
1441 hash = hash_add(hash, key_u32 & *p++);
1444 return hash_finish(hash, (p - mask->mf.inline_values) * 4);
1448 emc_entry_alive(struct emc_entry *ce)
1450 return ce->flow && !ce->flow->dead;
1454 emc_clear_entry(struct emc_entry *ce)
1457 dp_netdev_flow_unref(ce->flow);
1463 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1464 const struct netdev_flow_key *key)
1466 if (ce->flow != flow) {
1468 dp_netdev_flow_unref(ce->flow);
1471 if (dp_netdev_flow_ref(flow)) {
1478 netdev_flow_key_clone(&ce->key, key);
1483 emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
1484 struct dp_netdev_flow *flow)
1486 struct emc_entry *to_be_replaced = NULL;
1487 struct emc_entry *current_entry;
1489 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1490 if (netdev_flow_key_equal(¤t_entry->key, key)) {
1491 /* We found the entry with the 'mf' miniflow */
1492 emc_change_entry(current_entry, flow, NULL);
1496 /* Replacement policy: put the flow in an empty (not alive) entry, or
1497 * in the first entry where it can be */
1499 || (emc_entry_alive(to_be_replaced)
1500 && !emc_entry_alive(current_entry))
1501 || current_entry->key.hash < to_be_replaced->key.hash) {
1502 to_be_replaced = current_entry;
1505 /* We didn't find the miniflow in the cache.
1506 * The 'to_be_replaced' entry is where the new flow will be stored */
1508 emc_change_entry(to_be_replaced, flow, key);
1511 static inline struct dp_netdev_flow *
1512 emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
1514 struct emc_entry *current_entry;
1516 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1517 if (current_entry->key.hash == key->hash
1518 && emc_entry_alive(current_entry)
1519 && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
1521 /* We found the entry with the 'key->mf' miniflow */
1522 return current_entry->flow;
1529 static struct dp_netdev_flow *
1530 dp_netdev_lookup_flow(const struct dp_netdev *dp,
1531 const struct netdev_flow_key *key)
1533 struct dp_netdev_flow *netdev_flow;
1534 struct dpcls_rule *rule;
1536 dpcls_lookup(&dp->cls, key, &rule, 1);
1537 netdev_flow = dp_netdev_flow_cast(rule);
1542 static struct dp_netdev_flow *
1543 dp_netdev_find_flow(const struct dp_netdev *dp, const ovs_u128 *ufidp,
1544 const struct nlattr *key, size_t key_len)
1546 struct dp_netdev_flow *netdev_flow;
1550 /* If a UFID is not provided, determine one based on the key. */
1551 if (!ufidp && key && key_len
1552 && !dpif_netdev_flow_from_nlattrs(key, key_len, &flow)) {
1553 dpif_flow_hash(dp->dpif, &flow, sizeof flow, &ufid);
1558 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, dp_netdev_flow_hash(ufidp),
1560 if (ovs_u128_equal(&netdev_flow->ufid, ufidp)) {
1570 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow,
1571 struct dpif_flow_stats *stats)
1573 struct dp_netdev_flow_stats *bucket;
1576 memset(stats, 0, sizeof *stats);
1577 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1578 ovs_mutex_lock(&bucket->mutex);
1579 stats->n_packets += bucket->packet_count;
1580 stats->n_bytes += bucket->byte_count;
1581 stats->used = MAX(stats->used, bucket->used);
1582 stats->tcp_flags |= bucket->tcp_flags;
1583 ovs_mutex_unlock(&bucket->mutex);
1587 /* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
1588 * storing the netlink-formatted key/mask. 'key_buf' may be the same as
1589 * 'mask_buf'. Actions will be returned without copying, by relying on RCU to
1592 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1593 struct ofpbuf *key_buf, struct ofpbuf *mask_buf,
1594 struct dpif_flow *flow)
1596 struct flow_wildcards wc;
1597 struct dp_netdev_actions *actions;
1600 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1603 offset = ofpbuf_size(key_buf);
1604 flow->key = ofpbuf_tail(key_buf);
1605 odp_flow_key_from_flow(key_buf, &netdev_flow->flow, &wc.masks,
1606 netdev_flow->flow.in_port.odp_port, true);
1607 flow->key_len = ofpbuf_size(key_buf) - offset;
1610 offset = ofpbuf_size(mask_buf);
1611 flow->mask = ofpbuf_tail(mask_buf);
1612 odp_flow_key_from_mask(mask_buf, &wc.masks, &netdev_flow->flow,
1613 odp_to_u32(wc.masks.in_port.odp_port),
1615 flow->mask_len = ofpbuf_size(mask_buf) - offset;
1618 actions = dp_netdev_flow_get_actions(netdev_flow);
1619 flow->actions = actions->actions;
1620 flow->actions_len = actions->size;
1622 flow->ufid = netdev_flow->ufid;
1623 flow->ufid_present = true;
1624 get_dpif_flow_stats(netdev_flow, &flow->stats);
1628 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1629 const struct nlattr *mask_key,
1630 uint32_t mask_key_len, const struct flow *flow,
1634 enum odp_key_fitness fitness;
1636 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1638 /* This should not happen: it indicates that
1639 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1640 * disagree on the acceptable form of a mask. Log the problem
1641 * as an error, with enough details to enable debugging. */
1642 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1644 if (!VLOG_DROP_ERR(&rl)) {
1648 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1650 VLOG_ERR("internal error parsing flow mask %s (%s)",
1651 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1658 enum mf_field_id id;
1659 /* No mask key, unwildcard everything except fields whose
1660 * prerequisities are not met. */
1661 memset(mask, 0x0, sizeof *mask);
1663 for (id = 0; id < MFF_N_IDS; ++id) {
1664 /* Skip registers and metadata. */
1665 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1666 && id != MFF_METADATA) {
1667 const struct mf_field *mf = mf_from_id(id);
1668 if (mf_are_prereqs_ok(mf, flow)) {
1669 mf_mask_field(mf, mask);
1675 /* Force unwildcard the in_port.
1677 * We need to do this even in the case where we unwildcard "everything"
1678 * above because "everything" only includes the 16-bit OpenFlow port number
1679 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1680 * port number mask->in_port.odp_port. */
1681 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1687 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1692 if (odp_flow_key_to_flow(key, key_len, flow)) {
1693 /* This should not happen: it indicates that odp_flow_key_from_flow()
1694 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1695 * flow. Log the problem as an error, with enough details to enable
1697 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1699 if (!VLOG_DROP_ERR(&rl)) {
1703 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1704 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1711 in_port = flow->in_port.odp_port;
1712 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1720 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1722 struct dp_netdev *dp = get_dp_netdev(dpif);
1723 struct dp_netdev_flow *netdev_flow;
1726 netdev_flow = dp_netdev_find_flow(dp, get->ufid, get->key, get->key_len);
1728 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->buffer,
1737 static struct dp_netdev_flow *
1738 dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
1739 const ovs_u128 *ufid,
1740 const struct nlattr *actions, size_t actions_len)
1741 OVS_REQUIRES(dp->flow_mutex)
1743 struct dp_netdev_flow *flow;
1744 struct netdev_flow_key mask;
1746 netdev_flow_mask_init(&mask, match);
1747 /* Make sure wc does not have metadata. */
1748 ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
1750 /* Do not allocate extra space. */
1751 flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
1753 *CONST_CAST(struct flow *, &flow->flow) = match->flow;
1754 *CONST_CAST(ovs_u128 *, &flow->ufid) = *ufid;
1755 ovs_refcount_init(&flow->ref_cnt);
1756 ovsthread_stats_init(&flow->stats);
1757 ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
1759 cmap_insert(&dp->flow_table,
1760 CONST_CAST(struct cmap_node *, &flow->node),
1761 dp_netdev_flow_hash(&flow->ufid));
1762 netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
1763 dpcls_insert(&dp->cls, &flow->cr, &mask);
1765 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1767 struct ds ds = DS_EMPTY_INITIALIZER;
1769 match.flow = flow->flow;
1770 miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
1772 ds_put_cstr(&ds, "flow_add: ");
1773 odp_format_ufid(ufid, &ds);
1774 ds_put_cstr(&ds, " ");
1775 match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
1776 ds_put_cstr(&ds, ", actions:");
1777 format_odp_actions(&ds, actions, actions_len);
1779 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
1788 clear_stats(struct dp_netdev_flow *netdev_flow)
1790 struct dp_netdev_flow_stats *bucket;
1793 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1794 ovs_mutex_lock(&bucket->mutex);
1796 bucket->packet_count = 0;
1797 bucket->byte_count = 0;
1798 bucket->tcp_flags = 0;
1799 ovs_mutex_unlock(&bucket->mutex);
1804 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1806 struct dp_netdev *dp = get_dp_netdev(dpif);
1807 struct dp_netdev_flow *netdev_flow;
1808 struct netdev_flow_key key;
1813 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
1817 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1818 put->mask, put->mask_len,
1819 &match.flow, &match.wc.masks);
1824 /* Must produce a netdev_flow_key for lookup.
1825 * This interface is no longer performance critical, since it is not used
1826 * for upcall processing any more. */
1827 netdev_flow_key_from_flow(&key, &match.flow);
1832 dpif_flow_hash(dpif, &match.flow, sizeof match.flow, &ufid);
1835 ovs_mutex_lock(&dp->flow_mutex);
1836 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1838 if (put->flags & DPIF_FP_CREATE) {
1839 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1841 memset(put->stats, 0, sizeof *put->stats);
1843 dp_netdev_flow_add(dp, &match, &ufid, put->actions,
1853 if (put->flags & DPIF_FP_MODIFY
1854 && flow_equal(&match.flow, &netdev_flow->flow)) {
1855 struct dp_netdev_actions *new_actions;
1856 struct dp_netdev_actions *old_actions;
1858 new_actions = dp_netdev_actions_create(put->actions,
1861 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1862 ovsrcu_set(&netdev_flow->actions, new_actions);
1865 get_dpif_flow_stats(netdev_flow, put->stats);
1867 if (put->flags & DPIF_FP_ZERO_STATS) {
1868 clear_stats(netdev_flow);
1871 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1872 } else if (put->flags & DPIF_FP_CREATE) {
1875 /* Overlapping flow. */
1879 ovs_mutex_unlock(&dp->flow_mutex);
1885 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1887 struct dp_netdev *dp = get_dp_netdev(dpif);
1888 struct dp_netdev_flow *netdev_flow;
1891 ovs_mutex_lock(&dp->flow_mutex);
1892 netdev_flow = dp_netdev_find_flow(dp, del->ufid, del->key, del->key_len);
1895 get_dpif_flow_stats(netdev_flow, del->stats);
1897 dp_netdev_remove_flow(dp, netdev_flow);
1901 ovs_mutex_unlock(&dp->flow_mutex);
1906 struct dpif_netdev_flow_dump {
1907 struct dpif_flow_dump up;
1908 struct cmap_position pos;
1910 struct ovs_mutex mutex;
1913 static struct dpif_netdev_flow_dump *
1914 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1916 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1919 static struct dpif_flow_dump *
1920 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1922 struct dpif_netdev_flow_dump *dump;
1924 dump = xmalloc(sizeof *dump);
1925 dpif_flow_dump_init(&dump->up, dpif_);
1926 memset(&dump->pos, 0, sizeof dump->pos);
1928 ovs_mutex_init(&dump->mutex);
1934 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1936 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1938 ovs_mutex_destroy(&dump->mutex);
1943 struct dpif_netdev_flow_dump_thread {
1944 struct dpif_flow_dump_thread up;
1945 struct dpif_netdev_flow_dump *dump;
1946 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1947 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1950 static struct dpif_netdev_flow_dump_thread *
1951 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1953 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1956 static struct dpif_flow_dump_thread *
1957 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1959 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1960 struct dpif_netdev_flow_dump_thread *thread;
1962 thread = xmalloc(sizeof *thread);
1963 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1964 thread->dump = dump;
1969 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1971 struct dpif_netdev_flow_dump_thread *thread
1972 = dpif_netdev_flow_dump_thread_cast(thread_);
1978 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1979 struct dpif_flow *flows, int max_flows)
1981 struct dpif_netdev_flow_dump_thread *thread
1982 = dpif_netdev_flow_dump_thread_cast(thread_);
1983 struct dpif_netdev_flow_dump *dump = thread->dump;
1984 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1985 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1986 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1990 ovs_mutex_lock(&dump->mutex);
1991 if (!dump->status) {
1992 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1994 struct cmap_node *node;
1996 node = cmap_next_position(&dp->flow_table, &dump->pos);
2001 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
2005 ovs_mutex_unlock(&dump->mutex);
2007 for (i = 0; i < n_flows; i++) {
2008 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
2009 struct odputil_keybuf *keybuf = &thread->keybuf[i];
2010 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
2011 struct dpif_flow *f = &flows[i];
2012 struct ofpbuf key, mask;
2014 ofpbuf_use_stack(&key, keybuf, sizeof *keybuf);
2015 ofpbuf_use_stack(&mask, maskbuf, sizeof *maskbuf);
2016 dp_netdev_flow_to_dpif_flow(netdev_flow, &key, &mask, f);
2023 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
2024 OVS_NO_THREAD_SAFETY_ANALYSIS
2026 struct dp_netdev *dp = get_dp_netdev(dpif);
2027 struct dp_netdev_pmd_thread *pmd;
2028 struct dpif_packet packet, *pp;
2030 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
2031 ofpbuf_size(execute->packet) > UINT16_MAX) {
2035 packet.ofpbuf = *execute->packet;
2036 packet.md = execute->md;
2039 /* Tries finding the 'pmd'. If NULL is returned, that means
2040 * the current thread is a non-pmd thread and should use
2041 * dp_netdev_get_nonpmd(). */
2042 pmd = ovsthread_getspecific(dp->per_pmd_key);
2044 pmd = dp_netdev_get_nonpmd(dp);
2047 /* If the current thread is non-pmd thread, acquires
2048 * the 'non_pmd_mutex'. */
2049 if (pmd->core_id == NON_PMD_CORE_ID) {
2050 ovs_mutex_lock(&dp->non_pmd_mutex);
2051 ovs_mutex_lock(&dp->port_mutex);
2053 dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
2054 execute->actions_len);
2055 if (pmd->core_id == NON_PMD_CORE_ID) {
2056 ovs_mutex_unlock(&dp->port_mutex);
2057 ovs_mutex_unlock(&dp->non_pmd_mutex);
2060 /* Even though may_steal is set to false, some actions could modify or
2061 * reallocate the ofpbuf memory. We need to pass those changes to the
2063 *execute->packet = packet.ofpbuf;
2064 execute->md = packet.md;
2069 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
2073 for (i = 0; i < n_ops; i++) {
2074 struct dpif_op *op = ops[i];
2077 case DPIF_OP_FLOW_PUT:
2078 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
2081 case DPIF_OP_FLOW_DEL:
2082 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
2085 case DPIF_OP_EXECUTE:
2086 op->error = dpif_netdev_execute(dpif, &op->u.execute);
2089 case DPIF_OP_FLOW_GET:
2090 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
2096 /* Returns true if the configuration for rx queues or cpu mask
2099 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
2101 if (dp->n_dpdk_rxqs != rxqs) {
2104 if (dp->pmd_cmask != NULL && cmask != NULL) {
2105 return strcmp(dp->pmd_cmask, cmask);
2107 return (dp->pmd_cmask != NULL || cmask != NULL);
2112 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2114 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
2116 struct dp_netdev *dp = get_dp_netdev(dpif);
2118 if (pmd_config_changed(dp, n_rxqs, cmask)) {
2119 struct dp_netdev_port *port;
2121 dp_netdev_destroy_all_pmds(dp);
2123 CMAP_FOR_EACH (port, node, &dp->ports) {
2124 if (netdev_is_pmd(port->netdev)) {
2127 /* Closes the existing 'rxq's. */
2128 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2129 netdev_rxq_close(port->rxq[i]);
2130 port->rxq[i] = NULL;
2133 /* Sets the new rx queue config. */
2134 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
2136 if (err && (err != EOPNOTSUPP)) {
2137 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2138 " %u", netdev_get_name(port->netdev),
2143 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2144 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
2145 * netdev_n_rxq(port->netdev));
2146 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2147 netdev_rxq_open(port->netdev, &port->rxq[i], i);
2151 dp->n_dpdk_rxqs = n_rxqs;
2153 /* Reconfigures the cpu mask. */
2154 ovs_numa_set_cpu_mask(cmask);
2155 free(dp->pmd_cmask);
2156 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
2158 /* Restores the non-pmd. */
2159 dp_netdev_set_nonpmd(dp);
2160 /* Restores all pmd threads. */
2161 dp_netdev_reset_pmd_threads(dp);
2168 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2169 uint32_t queue_id, uint32_t *priority)
2171 *priority = queue_id;
2176 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2177 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2179 struct dp_netdev_actions *
2180 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2182 struct dp_netdev_actions *netdev_actions;
2184 netdev_actions = xmalloc(sizeof *netdev_actions);
2185 netdev_actions->actions = xmemdup(actions, size);
2186 netdev_actions->size = size;
2188 return netdev_actions;
2191 struct dp_netdev_actions *
2192 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2194 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2198 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2200 free(actions->actions);
2206 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2207 struct dp_netdev_port *port,
2208 struct netdev_rxq *rxq)
2210 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2213 error = netdev_rxq_recv(rxq, packets, &cnt);
2217 *recirc_depth_get() = 0;
2219 /* XXX: initialize md in netdev implementation. */
2220 for (i = 0; i < cnt; i++) {
2221 packets[i]->md = PKT_METADATA_INITIALIZER(port->port_no);
2223 dp_netdev_input(pmd, packets, cnt);
2224 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2225 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2227 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2228 netdev_get_name(port->netdev), ovs_strerror(error));
2232 /* Return true if needs to revalidate datapath flows. */
2234 dpif_netdev_run(struct dpif *dpif)
2236 struct dp_netdev_port *port;
2237 struct dp_netdev *dp = get_dp_netdev(dpif);
2238 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_nonpmd(dp);
2239 uint64_t new_tnl_seq;
2241 ovs_mutex_lock(&dp->non_pmd_mutex);
2242 CMAP_FOR_EACH (port, node, &dp->ports) {
2243 if (!netdev_is_pmd(port->netdev)) {
2246 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2247 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2251 ovs_mutex_unlock(&dp->non_pmd_mutex);
2252 tnl_arp_cache_run();
2253 new_tnl_seq = seq_read(tnl_conf_seq);
2255 if (dp->last_tnl_conf_seq != new_tnl_seq) {
2256 dp->last_tnl_conf_seq = new_tnl_seq;
2263 dpif_netdev_wait(struct dpif *dpif)
2265 struct dp_netdev_port *port;
2266 struct dp_netdev *dp = get_dp_netdev(dpif);
2268 ovs_mutex_lock(&dp_netdev_mutex);
2269 CMAP_FOR_EACH (port, node, &dp->ports) {
2270 if (!netdev_is_pmd(port->netdev)) {
2273 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2274 netdev_rxq_wait(port->rxq[i]);
2278 ovs_mutex_unlock(&dp_netdev_mutex);
2279 seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
2283 struct dp_netdev_port *port;
2284 struct netdev_rxq *rx;
2288 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2289 struct rxq_poll **ppoll_list, int poll_cnt)
2291 struct rxq_poll *poll_list = *ppoll_list;
2292 struct dp_netdev_port *port;
2293 int n_pmds_on_numa, index, i;
2295 /* Simple scheduler for netdev rx polling. */
2296 for (i = 0; i < poll_cnt; i++) {
2297 port_unref(poll_list[i].port);
2301 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2304 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2305 /* Calls port_try_ref() to prevent the main thread
2306 * from deleting the port. */
2307 if (port_try_ref(port)) {
2308 if (netdev_is_pmd(port->netdev)
2309 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2312 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2313 if ((index % n_pmds_on_numa) == pmd->index) {
2314 poll_list = xrealloc(poll_list,
2315 sizeof *poll_list * (poll_cnt + 1));
2318 poll_list[poll_cnt].port = port;
2319 poll_list[poll_cnt].rx = port->rxq[i];
2325 /* Unrefs the port_try_ref(). */
2330 *ppoll_list = poll_list;
2335 pmd_thread_main(void *f_)
2337 struct dp_netdev_pmd_thread *pmd = f_;
2338 unsigned int lc = 0;
2339 struct rxq_poll *poll_list;
2340 unsigned int port_seq = PMD_INITIAL_SEQ;
2347 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2348 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2349 pmd_thread_setaffinity_cpu(pmd->core_id);
2351 emc_cache_init(&pmd->flow_cache);
2352 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2354 /* Signal here to make sure the pmd finishes
2355 * reloading the updated configuration. */
2356 dp_netdev_pmd_reload_done(pmd);
2361 for (i = 0; i < poll_cnt; i++) {
2362 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2370 emc_cache_slow_sweep(&pmd->flow_cache);
2373 atomic_read_relaxed(&pmd->change_seq, &seq);
2374 if (seq != port_seq) {
2381 emc_cache_uninit(&pmd->flow_cache);
2383 if (!latch_is_set(&pmd->exit_latch)){
2387 for (i = 0; i < poll_cnt; i++) {
2388 port_unref(poll_list[i].port);
2391 dp_netdev_pmd_reload_done(pmd);
2398 dp_netdev_disable_upcall(struct dp_netdev *dp)
2399 OVS_ACQUIRES(dp->upcall_rwlock)
2401 fat_rwlock_wrlock(&dp->upcall_rwlock);
2405 dpif_netdev_disable_upcall(struct dpif *dpif)
2406 OVS_NO_THREAD_SAFETY_ANALYSIS
2408 struct dp_netdev *dp = get_dp_netdev(dpif);
2409 dp_netdev_disable_upcall(dp);
2413 dp_netdev_enable_upcall(struct dp_netdev *dp)
2414 OVS_RELEASES(dp->upcall_rwlock)
2416 fat_rwlock_unlock(&dp->upcall_rwlock);
2420 dpif_netdev_enable_upcall(struct dpif *dpif)
2421 OVS_NO_THREAD_SAFETY_ANALYSIS
2423 struct dp_netdev *dp = get_dp_netdev(dpif);
2424 dp_netdev_enable_upcall(dp);
2428 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
2430 ovs_mutex_lock(&pmd->cond_mutex);
2431 xpthread_cond_signal(&pmd->cond);
2432 ovs_mutex_unlock(&pmd->cond_mutex);
2435 /* Returns the pointer to the dp_netdev_pmd_thread for non-pmd threads. */
2436 static struct dp_netdev_pmd_thread *
2437 dp_netdev_get_nonpmd(struct dp_netdev *dp)
2439 struct dp_netdev_pmd_thread *pmd;
2440 const struct cmap_node *pnode;
2442 pnode = cmap_find(&dp->poll_threads, hash_int(NON_PMD_CORE_ID, 0));
2444 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2449 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2451 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2453 struct dp_netdev_pmd_thread *non_pmd;
2455 non_pmd = xzalloc(sizeof *non_pmd);
2456 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2460 /* Configures the 'pmd' based on the input argument. */
2462 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2463 int index, int core_id, int numa_id)
2467 pmd->core_id = core_id;
2468 pmd->numa_id = numa_id;
2469 latch_init(&pmd->exit_latch);
2470 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2471 xpthread_cond_init(&pmd->cond, NULL);
2472 ovs_mutex_init(&pmd->cond_mutex);
2473 /* init the 'flow_cache' since there is no
2474 * actual thread created for NON_PMD_CORE_ID. */
2475 if (core_id == NON_PMD_CORE_ID) {
2476 emc_cache_init(&pmd->flow_cache);
2478 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2479 hash_int(core_id, 0));
2482 /* Stops the pmd thread, removes it from the 'dp->poll_threads'
2483 * and destroys the struct. */
2485 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2487 /* Uninit the 'flow_cache' since there is
2488 * no actual thread uninit it. */
2489 if (pmd->core_id == NON_PMD_CORE_ID) {
2490 emc_cache_uninit(&pmd->flow_cache);
2492 latch_set(&pmd->exit_latch);
2493 dp_netdev_reload_pmd__(pmd);
2494 ovs_numa_unpin_core(pmd->core_id);
2495 xpthread_join(pmd->thread, NULL);
2497 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2498 latch_destroy(&pmd->exit_latch);
2499 xpthread_cond_destroy(&pmd->cond);
2500 ovs_mutex_destroy(&pmd->cond_mutex);
2504 /* Destroys all pmd threads. */
2506 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2508 struct dp_netdev_pmd_thread *pmd;
2510 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2511 dp_netdev_del_pmd(pmd);
2515 /* Deletes all pmd threads on numa node 'numa_id'. */
2517 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2519 struct dp_netdev_pmd_thread *pmd;
2521 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2522 if (pmd->numa_id == numa_id) {
2523 dp_netdev_del_pmd(pmd);
2528 /* Checks the numa node id of 'netdev' and starts pmd threads for
2531 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2535 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2536 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2537 "invalid", numa_id);
2541 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2543 /* If there are already pmd threads created for the numa node
2544 * in which 'netdev' is on, do nothing. Else, creates the
2545 * pmd threads for the numa node. */
2547 int can_have, n_unpinned, i;
2549 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2551 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2552 "cores on numa node");
2556 /* If cpu mask is specified, uses all unpinned cores, otherwise
2557 * tries creating NR_PMD_THREADS pmd threads. */
2558 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2559 for (i = 0; i < can_have; i++) {
2560 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2561 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2563 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2564 /* Each thread will distribute all devices rx-queues among
2566 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2568 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2574 dp_netdev_flow_stats_new_cb(void)
2576 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2577 ovs_mutex_init(&bucket->mutex);
2581 /* Called after pmd threads config change. Restarts pmd threads with
2582 * new configuration. */
2584 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2586 struct dp_netdev_port *port;
2588 CMAP_FOR_EACH (port, node, &dp->ports) {
2589 if (netdev_is_pmd(port->netdev)) {
2590 int numa_id = netdev_get_numa_id(port->netdev);
2592 dp_netdev_set_pmds_on_numa(dp, numa_id);
2598 dpif_netdev_get_datapath_version(void)
2600 return xstrdup("<built-in>");
2604 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
2608 long long int now = time_msec();
2609 struct dp_netdev_flow_stats *bucket;
2611 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
2612 dp_netdev_flow_stats_new_cb);
2614 ovs_mutex_lock(&bucket->mutex);
2615 bucket->used = MAX(now, bucket->used);
2616 bucket->packet_count += cnt;
2617 bucket->byte_count += size;
2618 bucket->tcp_flags |= tcp_flags;
2619 ovs_mutex_unlock(&bucket->mutex);
2623 dp_netdev_stats_new_cb(void)
2625 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2626 ovs_mutex_init(&bucket->mutex);
2631 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
2633 struct dp_netdev_stats *bucket;
2635 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2636 ovs_mutex_lock(&bucket->mutex);
2637 bucket->n[type] += cnt;
2638 ovs_mutex_unlock(&bucket->mutex);
2642 dp_netdev_upcall(struct dp_netdev *dp, struct dpif_packet *packet_,
2643 struct flow *flow, struct flow_wildcards *wc, ovs_u128 *ufid,
2644 enum dpif_upcall_type type, const struct nlattr *userdata,
2645 struct ofpbuf *actions, struct ofpbuf *put_actions)
2647 struct ofpbuf *packet = &packet_->ofpbuf;
2649 if (type == DPIF_UC_MISS) {
2650 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2653 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2657 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2658 struct ds ds = DS_EMPTY_INITIALIZER;
2662 ofpbuf_init(&key, 0);
2663 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2666 packet_str = ofp_packet_to_string(ofpbuf_data(packet),
2667 ofpbuf_size(packet));
2669 odp_flow_key_format(ofpbuf_data(&key), ofpbuf_size(&key), &ds);
2671 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
2672 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
2674 ofpbuf_uninit(&key);
2679 return dp->upcall_cb(packet, flow, ufid, type, userdata, actions, wc,
2680 put_actions, dp->upcall_aux);
2683 static inline uint32_t
2684 dpif_netdev_packet_get_dp_hash(struct dpif_packet *packet,
2685 const struct miniflow *mf)
2689 hash = dpif_packet_get_dp_hash(packet);
2690 if (OVS_UNLIKELY(!hash)) {
2691 hash = miniflow_hash_5tuple(mf, 0);
2692 dpif_packet_set_dp_hash(packet, hash);
2697 struct packet_batch {
2698 unsigned int packet_count;
2699 unsigned int byte_count;
2702 struct dp_netdev_flow *flow;
2704 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2708 packet_batch_update(struct packet_batch *batch, struct dpif_packet *packet,
2709 const struct miniflow *mf)
2711 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2712 batch->packets[batch->packet_count++] = packet;
2713 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2717 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
2721 batch->packet_count = 0;
2722 batch->byte_count = 0;
2723 batch->tcp_flags = 0;
2727 packet_batch_execute(struct packet_batch *batch,
2728 struct dp_netdev_pmd_thread *pmd)
2730 struct dp_netdev_actions *actions;
2731 struct dp_netdev_flow *flow = batch->flow;
2733 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2736 actions = dp_netdev_flow_get_actions(flow);
2738 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
2739 actions->actions, actions->size);
2741 dp_netdev_count_packet(pmd->dp, DP_STAT_HIT, batch->packet_count);
2745 dp_netdev_queue_batches(struct dpif_packet *pkt,
2746 struct dp_netdev_flow *flow, const struct miniflow *mf,
2747 struct packet_batch *batches, size_t *n_batches,
2750 struct packet_batch *batch = NULL;
2753 if (OVS_UNLIKELY(!flow)) {
2756 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2757 * assumption that the number of distinct flows (and therefore the
2758 * number of distinct batches) is quite small. If this turns out not
2759 * to be the case, it may make sense to pre sort based on the
2760 * netdev_flow pointer. That done we can get the appropriate batching
2761 * in O(n * log(n)) instead. */
2762 for (j = *n_batches - 1; j >= 0; j--) {
2763 if (batches[j].flow == flow) {
2764 batch = &batches[j];
2765 packet_batch_update(batch, pkt, mf);
2769 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
2773 batch = &batches[(*n_batches)++];
2774 packet_batch_init(batch, flow);
2775 packet_batch_update(batch, pkt, mf);
2780 dpif_packet_swap(struct dpif_packet **a, struct dpif_packet **b)
2782 struct dpif_packet *tmp = *a;
2787 /* Try to process all ('cnt') the 'packets' using only the exact match cache
2788 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
2789 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
2790 * and the packet pointer is moved at the beginning of the 'packets' array.
2792 * The function returns the number of packets that needs to be processed in the
2793 * 'packets' array (they have been moved to the beginning of the vector).
2795 static inline size_t
2796 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dpif_packet **packets,
2797 size_t cnt, struct netdev_flow_key *keys)
2799 struct netdev_flow_key key;
2800 struct packet_batch batches[4];
2801 struct emc_cache *flow_cache = &pmd->flow_cache;
2802 size_t n_batches, i;
2803 size_t notfound_cnt = 0;
2806 miniflow_initialize(&key.mf, key.buf);
2807 for (i = 0; i < cnt; i++) {
2808 struct dp_netdev_flow *flow;
2810 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2811 dpif_packet_delete(packets[i]);
2815 miniflow_extract(&packets[i]->ofpbuf, &packets[i]->md, &key.mf);
2816 key.len = 0; /* Not computed yet. */
2817 key.hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.mf);
2819 flow = emc_lookup(flow_cache, &key);
2820 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], flow, &key.mf,
2821 batches, &n_batches,
2822 ARRAY_SIZE(batches)))) {
2823 if (i != notfound_cnt) {
2824 dpif_packet_swap(&packets[i], &packets[notfound_cnt]);
2827 keys[notfound_cnt++] = key;
2831 for (i = 0; i < n_batches; i++) {
2832 packet_batch_execute(&batches[i], pmd);
2835 return notfound_cnt;
2839 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
2840 struct dpif_packet **packets, size_t cnt,
2841 struct netdev_flow_key *keys)
2843 #if !defined(__CHECKER__) && !defined(_WIN32)
2844 const size_t PKT_ARRAY_SIZE = cnt;
2846 /* Sparse or MSVC doesn't like variable length array. */
2847 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2849 struct packet_batch batches[PKT_ARRAY_SIZE];
2850 struct dpcls_rule *rules[PKT_ARRAY_SIZE];
2851 struct dp_netdev *dp = pmd->dp;
2852 struct emc_cache *flow_cache = &pmd->flow_cache;
2853 size_t n_batches, i;
2856 for (i = 0; i < cnt; i++) {
2857 /* Key length is needed in all the cases, hash computed on demand. */
2858 keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
2860 any_miss = !dpcls_lookup(&dp->cls, keys, rules, cnt);
2861 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2862 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
2863 struct ofpbuf actions, put_actions;
2866 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
2867 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
2869 for (i = 0; i < cnt; i++) {
2870 struct dp_netdev_flow *netdev_flow;
2871 struct ofpbuf *add_actions;
2875 if (OVS_LIKELY(rules[i])) {
2879 /* It's possible that an earlier slow path execution installed
2880 * a rule covering this flow. In this case, it's a lot cheaper
2881 * to catch it here than execute a miss. */
2882 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2884 rules[i] = &netdev_flow->cr;
2888 miniflow_expand(&keys[i].mf, &match.flow);
2890 ofpbuf_clear(&actions);
2891 ofpbuf_clear(&put_actions);
2893 dpif_flow_hash(dp->dpif, &match.flow, sizeof match.flow, &ufid);
2894 error = dp_netdev_upcall(dp, packets[i], &match.flow, &match.wc,
2895 &ufid, DPIF_UC_MISS, NULL, &actions,
2897 if (OVS_UNLIKELY(error && error != ENOSPC)) {
2901 /* We can't allow the packet batching in the next loop to execute
2902 * the actions. Otherwise, if there are any slow path actions,
2903 * we'll send the packet up twice. */
2904 dp_netdev_execute_actions(pmd, &packets[i], 1, true,
2905 ofpbuf_data(&actions),
2906 ofpbuf_size(&actions));
2908 add_actions = ofpbuf_size(&put_actions)
2912 if (OVS_LIKELY(error != ENOSPC)) {
2913 /* XXX: There's a race window where a flow covering this packet
2914 * could have already been installed since we last did the flow
2915 * lookup before upcall. This could be solved by moving the
2916 * mutex lock outside the loop, but that's an awful long time
2917 * to be locking everyone out of making flow installs. If we
2918 * move to a per-core classifier, it would be reasonable. */
2919 ovs_mutex_lock(&dp->flow_mutex);
2920 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2921 if (OVS_LIKELY(!netdev_flow)) {
2922 netdev_flow = dp_netdev_flow_add(dp, &match, &ufid,
2923 ofpbuf_data(add_actions),
2924 ofpbuf_size(add_actions));
2926 ovs_mutex_unlock(&dp->flow_mutex);
2928 emc_insert(flow_cache, &keys[i], netdev_flow);
2932 ofpbuf_uninit(&actions);
2933 ofpbuf_uninit(&put_actions);
2934 fat_rwlock_unlock(&dp->upcall_rwlock);
2935 } else if (OVS_UNLIKELY(any_miss)) {
2936 int dropped_cnt = 0;
2938 for (i = 0; i < cnt; i++) {
2939 if (OVS_UNLIKELY(!rules[i])) {
2940 dpif_packet_delete(packets[i]);
2945 dp_netdev_count_packet(dp, DP_STAT_LOST, dropped_cnt);
2949 for (i = 0; i < cnt; i++) {
2950 struct dpif_packet *packet = packets[i];
2951 struct dp_netdev_flow *flow;
2953 if (OVS_UNLIKELY(!rules[i])) {
2957 flow = dp_netdev_flow_cast(rules[i]);
2959 emc_insert(flow_cache, &keys[i], flow);
2960 dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches,
2961 &n_batches, ARRAY_SIZE(batches));
2964 for (i = 0; i < n_batches; i++) {
2965 packet_batch_execute(&batches[i], pmd);
2970 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
2971 struct dpif_packet **packets, int cnt)
2973 #if !defined(__CHECKER__) && !defined(_WIN32)
2974 const size_t PKT_ARRAY_SIZE = cnt;
2976 /* Sparse or MSVC doesn't like variable length array. */
2977 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2979 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
2982 newcnt = emc_processing(pmd, packets, cnt, keys);
2983 if (OVS_UNLIKELY(newcnt)) {
2984 fast_path_processing(pmd, packets, newcnt, keys);
2988 struct dp_netdev_execute_aux {
2989 struct dp_netdev_pmd_thread *pmd;
2993 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
2996 struct dp_netdev *dp = get_dp_netdev(dpif);
2997 dp->upcall_aux = aux;
3002 dp_netdev_drop_packets(struct dpif_packet ** packets, int cnt, bool may_steal)
3007 for (i = 0; i < cnt; i++) {
3008 dpif_packet_delete(packets[i]);
3014 push_tnl_action(const struct dp_netdev *dp,
3015 const struct nlattr *attr,
3016 struct dpif_packet **packets, int cnt)
3018 struct dp_netdev_port *tun_port;
3019 const struct ovs_action_push_tnl *data;
3021 data = nl_attr_get(attr);
3023 tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
3027 netdev_push_header(tun_port->netdev, packets, cnt, data);
3033 dp_netdev_clone_pkt_batch(struct dpif_packet **tnl_pkt,
3034 struct dpif_packet **packets, int cnt)
3038 for (i = 0; i < cnt; i++) {
3039 tnl_pkt[i] = dpif_packet_clone(packets[i]);
3044 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
3045 const struct nlattr *a, bool may_steal)
3046 OVS_NO_THREAD_SAFETY_ANALYSIS
3048 struct dp_netdev_execute_aux *aux = aux_;
3049 uint32_t *depth = recirc_depth_get();
3050 struct dp_netdev_pmd_thread *pmd= aux->pmd;
3051 struct dp_netdev *dp= pmd->dp;
3052 int type = nl_attr_type(a);
3053 struct dp_netdev_port *p;
3056 switch ((enum ovs_action_attr)type) {
3057 case OVS_ACTION_ATTR_OUTPUT:
3058 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
3059 if (OVS_LIKELY(p)) {
3060 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
3065 case OVS_ACTION_ATTR_TUNNEL_PUSH:
3066 if (*depth < MAX_RECIRC_DEPTH) {
3067 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3071 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3075 err = push_tnl_action(dp, a, packets, cnt);
3078 dp_netdev_input(pmd, packets, cnt);
3081 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3087 case OVS_ACTION_ATTR_TUNNEL_POP:
3088 if (*depth < MAX_RECIRC_DEPTH) {
3089 odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
3091 p = dp_netdev_lookup_port(dp, portno);
3093 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3097 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3101 err = netdev_pop_header(p->netdev, packets, cnt);
3104 for (i = 0; i < cnt; i++) {
3105 packets[i]->md.in_port.odp_port = portno;
3109 dp_netdev_input(pmd, packets, cnt);
3112 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3119 case OVS_ACTION_ATTR_USERSPACE:
3120 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3121 const struct nlattr *userdata;
3122 struct ofpbuf actions;
3126 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
3127 ofpbuf_init(&actions, 0);
3129 for (i = 0; i < cnt; i++) {
3132 ofpbuf_clear(&actions);
3134 flow_extract(&packets[i]->ofpbuf, &packets[i]->md, &flow);
3135 dpif_flow_hash(dp->dpif, &flow, sizeof flow, &ufid);
3136 error = dp_netdev_upcall(dp, packets[i], &flow, NULL, &ufid,
3137 DPIF_UC_ACTION, userdata,&actions,
3139 if (!error || error == ENOSPC) {
3140 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
3141 ofpbuf_data(&actions),
3142 ofpbuf_size(&actions));
3143 } else if (may_steal) {
3144 dpif_packet_delete(packets[i]);
3147 ofpbuf_uninit(&actions);
3148 fat_rwlock_unlock(&dp->upcall_rwlock);
3154 case OVS_ACTION_ATTR_RECIRC:
3155 if (*depth < MAX_RECIRC_DEPTH) {
3158 for (i = 0; i < cnt; i++) {
3159 struct dpif_packet *recirc_pkt;
3161 recirc_pkt = (may_steal) ? packets[i]
3162 : dpif_packet_clone(packets[i]);
3164 recirc_pkt->md.recirc_id = nl_attr_get_u32(a);
3166 /* Hash is private to each packet */
3167 recirc_pkt->md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
3169 dp_netdev_input(pmd, &recirc_pkt, 1);
3176 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3179 case OVS_ACTION_ATTR_PUSH_VLAN:
3180 case OVS_ACTION_ATTR_POP_VLAN:
3181 case OVS_ACTION_ATTR_PUSH_MPLS:
3182 case OVS_ACTION_ATTR_POP_MPLS:
3183 case OVS_ACTION_ATTR_SET:
3184 case OVS_ACTION_ATTR_SET_MASKED:
3185 case OVS_ACTION_ATTR_SAMPLE:
3186 case OVS_ACTION_ATTR_HASH:
3187 case OVS_ACTION_ATTR_UNSPEC:
3188 case __OVS_ACTION_ATTR_MAX:
3192 dp_netdev_drop_packets(packets, cnt, may_steal);
3196 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
3197 struct dpif_packet **packets, int cnt,
3199 const struct nlattr *actions, size_t actions_len)
3201 struct dp_netdev_execute_aux aux = { pmd };
3203 odp_execute_actions(&aux, packets, cnt, may_steal, actions,
3204 actions_len, dp_execute_cb);
3207 const struct dpif_class dpif_netdev_class = {
3209 dpif_netdev_enumerate,
3210 dpif_netdev_port_open_type,
3213 dpif_netdev_destroy,
3216 dpif_netdev_get_stats,
3217 dpif_netdev_port_add,
3218 dpif_netdev_port_del,
3219 dpif_netdev_port_query_by_number,
3220 dpif_netdev_port_query_by_name,
3221 NULL, /* port_get_pid */
3222 dpif_netdev_port_dump_start,
3223 dpif_netdev_port_dump_next,
3224 dpif_netdev_port_dump_done,
3225 dpif_netdev_port_poll,
3226 dpif_netdev_port_poll_wait,
3227 dpif_netdev_flow_flush,
3228 dpif_netdev_flow_dump_create,
3229 dpif_netdev_flow_dump_destroy,
3230 dpif_netdev_flow_dump_thread_create,
3231 dpif_netdev_flow_dump_thread_destroy,
3232 dpif_netdev_flow_dump_next,
3233 dpif_netdev_operate,
3234 NULL, /* recv_set */
3235 NULL, /* handlers_set */
3236 dpif_netdev_pmd_set,
3237 dpif_netdev_queue_to_priority,
3239 NULL, /* recv_wait */
3240 NULL, /* recv_purge */
3241 dpif_netdev_register_upcall_cb,
3242 dpif_netdev_enable_upcall,
3243 dpif_netdev_disable_upcall,
3244 dpif_netdev_get_datapath_version,
3248 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
3249 const char *argv[], void *aux OVS_UNUSED)
3251 struct dp_netdev_port *old_port;
3252 struct dp_netdev_port *new_port;
3253 struct dp_netdev *dp;
3256 ovs_mutex_lock(&dp_netdev_mutex);
3257 dp = shash_find_data(&dp_netdevs, argv[1]);
3258 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3259 ovs_mutex_unlock(&dp_netdev_mutex);
3260 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3263 ovs_refcount_ref(&dp->ref_cnt);
3264 ovs_mutex_unlock(&dp_netdev_mutex);
3266 ovs_mutex_lock(&dp->port_mutex);
3267 if (get_port_by_name(dp, argv[2], &old_port)) {
3268 unixctl_command_reply_error(conn, "unknown port");
3272 port_no = u32_to_odp(atoi(argv[3]));
3273 if (!port_no || port_no == ODPP_NONE) {
3274 unixctl_command_reply_error(conn, "bad port number");
3277 if (dp_netdev_lookup_port(dp, port_no)) {
3278 unixctl_command_reply_error(conn, "port number already in use");
3282 /* Remove old port. */
3283 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3284 ovsrcu_postpone(free, old_port);
3286 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3287 new_port = xmemdup(old_port, sizeof *old_port);
3288 new_port->port_no = port_no;
3289 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3291 seq_change(dp->port_seq);
3292 unixctl_command_reply(conn, NULL);
3295 ovs_mutex_unlock(&dp->port_mutex);
3296 dp_netdev_unref(dp);
3300 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3301 const char *argv[], void *aux OVS_UNUSED)
3303 struct dp_netdev_port *port;
3304 struct dp_netdev *dp;
3306 ovs_mutex_lock(&dp_netdev_mutex);
3307 dp = shash_find_data(&dp_netdevs, argv[1]);
3308 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3309 ovs_mutex_unlock(&dp_netdev_mutex);
3310 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3313 ovs_refcount_ref(&dp->ref_cnt);
3314 ovs_mutex_unlock(&dp_netdev_mutex);
3316 ovs_mutex_lock(&dp->port_mutex);
3317 if (get_port_by_name(dp, argv[2], &port)) {
3318 unixctl_command_reply_error(conn, "unknown port");
3319 } else if (port->port_no == ODPP_LOCAL) {
3320 unixctl_command_reply_error(conn, "can't delete local port");
3322 do_del_port(dp, port);
3323 unixctl_command_reply(conn, NULL);
3325 ovs_mutex_unlock(&dp->port_mutex);
3327 dp_netdev_unref(dp);
3331 dpif_dummy_register__(const char *type)
3333 struct dpif_class *class;
3335 class = xmalloc(sizeof *class);
3336 *class = dpif_netdev_class;
3337 class->type = xstrdup(type);
3338 dp_register_provider(class);
3342 dpif_dummy_register(bool override)
3349 dp_enumerate_types(&types);
3350 SSET_FOR_EACH (type, &types) {
3351 if (!dp_unregister_provider(type)) {
3352 dpif_dummy_register__(type);
3355 sset_destroy(&types);
3358 dpif_dummy_register__("dummy");
3360 unixctl_command_register("dpif-dummy/change-port-number",
3361 "dp port new-number",
3362 3, 3, dpif_dummy_change_port_number, NULL);
3363 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3364 2, 2, dpif_dummy_delete_port, NULL);
3367 /* Datapath Classifier. */
3369 /* A set of rules that all have the same fields wildcarded. */
3370 struct dpcls_subtable {
3371 /* The fields are only used by writers. */
3372 struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
3374 /* These fields are accessed by readers. */
3375 struct cmap rules; /* Contains "struct dpcls_rule"s. */
3376 struct netdev_flow_key mask; /* Wildcards for fields (const). */
3377 /* 'mask' must be the last field, additional space is allocated here. */
3380 /* Initializes 'cls' as a classifier that initially contains no classification
3383 dpcls_init(struct dpcls *cls)
3385 cmap_init(&cls->subtables_map);
3386 pvector_init(&cls->subtables);
3390 dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
3392 pvector_remove(&cls->subtables, subtable);
3393 cmap_remove(&cls->subtables_map, &subtable->cmap_node,
3394 subtable->mask.hash);
3395 cmap_destroy(&subtable->rules);
3396 ovsrcu_postpone(free, subtable);
3399 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
3400 * caller's responsibility.
3401 * May only be called after all the readers have been terminated. */
3403 dpcls_destroy(struct dpcls *cls)
3406 struct dpcls_subtable *subtable;
3408 CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
3409 dpcls_destroy_subtable(cls, subtable);
3411 cmap_destroy(&cls->subtables_map);
3412 pvector_destroy(&cls->subtables);
3416 static struct dpcls_subtable *
3417 dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3419 struct dpcls_subtable *subtable;
3421 /* Need to add one. */
3422 subtable = xmalloc(sizeof *subtable
3423 - sizeof subtable->mask.mf + mask->len);
3424 cmap_init(&subtable->rules);
3425 netdev_flow_key_clone(&subtable->mask, mask);
3426 cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
3427 pvector_insert(&cls->subtables, subtable, 0);
3428 pvector_publish(&cls->subtables);
3433 static inline struct dpcls_subtable *
3434 dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3436 struct dpcls_subtable *subtable;
3438 CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
3439 &cls->subtables_map) {
3440 if (netdev_flow_key_equal(&subtable->mask, mask)) {
3444 return dpcls_create_subtable(cls, mask);
3447 /* Insert 'rule' into 'cls'. */
3449 dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
3450 const struct netdev_flow_key *mask)
3452 struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
3454 rule->mask = &subtable->mask;
3455 cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
3458 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
3460 dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
3462 struct dpcls_subtable *subtable;
3464 ovs_assert(rule->mask);
3466 INIT_CONTAINER(subtable, rule->mask, mask);
3468 if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
3470 dpcls_destroy_subtable(cls, subtable);
3471 pvector_publish(&cls->subtables);
3475 /* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
3476 * in 'mask' the values in 'key' and 'target' are the same.
3478 * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
3480 dpcls_rule_matches_key(const struct dpcls_rule *rule,
3481 const struct netdev_flow_key *target)
3483 const uint32_t *keyp = rule->flow.mf.inline_values;
3484 const uint32_t *maskp = rule->mask->mf.inline_values;
3485 uint32_t target_u32;
3487 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u32, target, rule->flow.mf.map) {
3488 if (OVS_UNLIKELY((target_u32 & *maskp++) != *keyp++)) {
3495 /* For each miniflow in 'flows' performs a classifier lookup writing the result
3496 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
3497 * NULL it is skipped.
3499 * This function is optimized for use in the userspace datapath and therefore
3500 * does not implement a lot of features available in the standard
3501 * classifier_lookup() function. Specifically, it does not implement
3502 * priorities, instead returning any rule which matches the flow.
3504 * Returns true if all flows found a corresponding rule. */
3506 dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
3507 struct dpcls_rule **rules, const size_t cnt)
3509 /* The batch size 16 was experimentally found faster than 8 or 32. */
3510 typedef uint16_t map_type;
3511 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
3513 #if !defined(__CHECKER__) && !defined(_WIN32)
3514 const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
3516 enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_RX_BATCH, MAP_BITS) };
3518 map_type maps[N_MAPS];
3519 struct dpcls_subtable *subtable;
3521 memset(maps, 0xff, sizeof maps);
3522 if (cnt % MAP_BITS) {
3523 maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
3525 memset(rules, 0, cnt * sizeof *rules);
3527 PVECTOR_FOR_EACH (subtable, &cls->subtables) {
3528 const struct netdev_flow_key *mkeys = keys;
3529 struct dpcls_rule **mrules = rules;
3530 map_type remains = 0;
3533 BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
3535 for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
3536 uint32_t hashes[MAP_BITS];
3537 const struct cmap_node *nodes[MAP_BITS];
3538 unsigned long map = maps[m];
3542 continue; /* Skip empty maps. */
3545 /* Compute hashes for the remaining keys. */
3546 ULONG_FOR_EACH_1(i, map) {
3547 hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
3551 map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
3552 /* Check results. */
3553 ULONG_FOR_EACH_1(i, map) {
3554 struct dpcls_rule *rule;
3556 CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
3557 if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
3562 ULONG_SET0(map, i); /* Did not match. */
3564 ; /* Keep Sparse happy. */
3566 maps[m] &= ~map; /* Clear the found rules. */
3570 return true; /* All found. */
3573 return false; /* Some misses. */