2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include "dpif-netdev.h"
24 #include <netinet/in.h>
25 #include <sys/socket.h>
30 #include <sys/ioctl.h>
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
40 #include "fat-rwlock.h"
46 #include "meta-flow.h"
48 #include "netdev-dpdk.h"
49 #include "netdev-vport.h"
51 #include "odp-execute.h"
53 #include "ofp-print.h"
57 #include "packet-dpif.h"
59 #include "poll-loop.h"
66 #include "tnl-arp-cache.h"
71 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
73 #define FLOW_DUMP_MAX_BATCH 50
74 /* Use per thread recirc_depth to prevent recirculation loop. */
75 #define MAX_RECIRC_DEPTH 5
76 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
78 /* Configuration parameters. */
79 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
81 /* Protects against changes to 'dp_netdevs'. */
82 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
84 /* Contains all 'struct dp_netdev's. */
85 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
86 = SHASH_INITIALIZER(&dp_netdevs);
88 static struct vlog_rate_limit upcall_rl = VLOG_RATE_LIMIT_INIT(600, 600);
90 /* Stores a miniflow with inline values */
92 struct netdev_flow_key {
93 uint32_t hash; /* Hash function differs for different users. */
94 uint32_t len; /* Length of the following miniflow (incl. map). */
96 uint32_t buf[FLOW_MAX_PACKET_U32S - MINI_N_INLINE];
99 /* Exact match cache for frequently used flows
101 * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
102 * search its entries for a miniflow that matches exactly the miniflow of the
103 * packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
105 * A cache entry holds a reference to its 'dp_netdev_flow'.
107 * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
108 * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
109 * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
110 * value is the index of a cache entry where the miniflow could be.
116 * Each pmd_thread has its own private exact match cache.
117 * If dp_netdev_input is not called from a pmd thread, a mutex is used.
120 #define EM_FLOW_HASH_SHIFT 10
121 #define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
122 #define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
123 #define EM_FLOW_HASH_SEGS 2
126 struct dp_netdev_flow *flow;
127 struct netdev_flow_key key; /* key.hash used for emc hash value. */
131 struct emc_entry entries[EM_FLOW_HASH_ENTRIES];
134 /* Iterate in the exact match cache through every entry that might contain a
135 * miniflow with hash 'HASH'. */
136 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
137 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
138 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
139 i__ < EM_FLOW_HASH_SEGS; \
140 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
142 /* Simple non-wildcarding single-priority classifier. */
145 struct cmap subtables_map;
146 struct pvector subtables;
149 /* A rule to be inserted to the classifier. */
151 struct cmap_node cmap_node; /* Within struct dpcls_subtable 'rules'. */
152 struct netdev_flow_key *mask; /* Subtable's mask. */
153 struct netdev_flow_key flow; /* Matching key. */
154 /* 'flow' must be the last field, additional space is allocated here. */
157 static void dpcls_init(struct dpcls *);
158 static void dpcls_destroy(struct dpcls *);
159 static void dpcls_insert(struct dpcls *, struct dpcls_rule *,
160 const struct netdev_flow_key *mask);
161 static void dpcls_remove(struct dpcls *, struct dpcls_rule *);
162 static bool dpcls_lookup(const struct dpcls *cls,
163 const struct netdev_flow_key keys[],
164 struct dpcls_rule **rules, size_t cnt);
166 /* Datapath based on the network device interface from netdev.h.
172 * Some members, marked 'const', are immutable. Accessing other members
173 * requires synchronization, as noted in more detail below.
175 * Acquisition order is, from outermost to innermost:
177 * dp_netdev_mutex (global)
182 const struct dpif_class *const class;
183 const char *const name;
185 struct ovs_refcount ref_cnt;
186 atomic_flag destroyed;
190 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
191 * changes to 'cls' must be made while still holding the 'flow_mutex'.
193 struct ovs_mutex flow_mutex;
195 struct cmap flow_table OVS_GUARDED; /* Flow table. */
199 * ovsthread_stats is internally synchronized. */
200 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
204 * Protected by RCU. Take the mutex to add or remove ports. */
205 struct ovs_mutex port_mutex;
207 struct seq *port_seq; /* Incremented whenever a port changes. */
209 /* Protects access to ofproto-dpif-upcall interface during revalidator
210 * thread synchronization. */
211 struct fat_rwlock upcall_rwlock;
212 upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
215 /* Stores all 'struct dp_netdev_pmd_thread's. */
216 struct cmap poll_threads;
218 /* Protects the access of the 'struct dp_netdev_pmd_thread'
219 * instance for non-pmd thread. */
220 struct ovs_mutex non_pmd_mutex;
222 /* Each pmd thread will store its pointer to
223 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
224 ovsthread_key_t per_pmd_key;
226 /* Number of rx queues for each dpdk interface and the cpu mask
227 * for pin of pmd threads. */
230 uint64_t last_tnl_conf_seq;
233 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
237 DP_STAT_HIT, /* Packets that matched in the flow table. */
238 DP_STAT_MISS, /* Packets that did not match. */
239 DP_STAT_LOST, /* Packets not passed up to the client. */
243 /* Contained by struct dp_netdev's 'stats' member. */
244 struct dp_netdev_stats {
245 struct ovs_mutex mutex; /* Protects 'n'. */
247 /* Indexed by DP_STAT_*, protected by 'mutex'. */
248 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
252 /* A port in a netdev-based datapath. */
253 struct dp_netdev_port {
254 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
256 struct netdev *netdev;
257 struct netdev_saved_flags *sf;
258 struct netdev_rxq **rxq;
259 struct ovs_refcount ref_cnt;
260 char *type; /* Port type as requested by user. */
264 /* A flow in dp_netdev's 'flow_table'.
270 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
271 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
276 * The thread safety rules described here for "struct dp_netdev_flow" are
277 * motivated by two goals:
279 * - Prevent threads that read members of "struct dp_netdev_flow" from
280 * reading bad data due to changes by some thread concurrently modifying
283 * - Prevent two threads making changes to members of a given "struct
284 * dp_netdev_flow" from interfering with each other.
290 * A flow 'flow' may be accessed without a risk of being freed during an RCU
291 * grace period. Code that needs to hold onto a flow for a while
292 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
294 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
295 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
298 * Some members, marked 'const', are immutable. Accessing other members
299 * requires synchronization, as noted in more detail below.
301 struct dp_netdev_flow {
304 /* Hash table index by unmasked flow. */
305 const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
306 const struct flow flow; /* Unmasked flow that created this entry. */
308 /* Number of references.
309 * The classifier owns one reference.
310 * Any thread trying to keep a rule from being freed should hold its own
312 struct ovs_refcount ref_cnt;
316 * Reading or writing these members requires 'mutex'. */
317 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
320 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
322 /* Packet classification. */
323 struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
324 /* 'cr' must be the last member. */
327 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
328 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
330 /* Contained by struct dp_netdev_flow's 'stats' member. */
331 struct dp_netdev_flow_stats {
332 struct ovs_mutex mutex; /* Guards all the other members. */
334 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
335 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
336 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
337 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
340 /* A set of datapath actions within a "struct dp_netdev_flow".
346 * A struct dp_netdev_actions 'actions' is protected with RCU. */
347 struct dp_netdev_actions {
348 /* These members are immutable: they do not change during the struct's
350 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
351 unsigned int size; /* Size of 'actions', in bytes. */
354 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
356 struct dp_netdev_actions *dp_netdev_flow_get_actions(
357 const struct dp_netdev_flow *);
358 static void dp_netdev_actions_free(struct dp_netdev_actions *);
360 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
361 * the performance overhead of interrupt processing. Therefore netdev can
362 * not implement rx-wait for these devices. dpif-netdev needs to poll
363 * these device to check for recv buffer. pmd-thread does polling for
364 * devices assigned to itself thread.
366 * DPDK used PMD for accessing NIC.
368 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
369 * I/O of all non-pmd threads. There will be no actual thread created
372 struct dp_netdev_pmd_thread {
373 struct dp_netdev *dp;
374 struct cmap_node node; /* In 'dp->poll_threads'. */
376 pthread_cond_t cond; /* For synchronizing pmd thread reload. */
377 struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
379 /* Per thread exact-match cache. Note, the instance for cpu core
380 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
381 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
382 * instances will only be accessed by its own pmd thread. */
383 struct emc_cache flow_cache;
384 struct latch exit_latch; /* For terminating the pmd thread. */
385 atomic_uint change_seq; /* For reloading pmd ports. */
387 int index; /* Idx of this pmd thread among pmd*/
388 /* threads on same numa node. */
389 int core_id; /* CPU core id of this pmd thread. */
390 int numa_id; /* numa node id of this pmd thread. */
393 #define PMD_INITIAL_SEQ 1
395 /* Interface to netdev-based datapath. */
398 struct dp_netdev *dp;
399 uint64_t last_port_seq;
402 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
403 struct dp_netdev_port **portp);
404 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
405 struct dp_netdev_port **portp);
406 static void dp_netdev_free(struct dp_netdev *)
407 OVS_REQUIRES(dp_netdev_mutex);
408 static void dp_netdev_flow_flush(struct dp_netdev *);
409 static int do_add_port(struct dp_netdev *dp, const char *devname,
410 const char *type, odp_port_t port_no)
411 OVS_REQUIRES(dp->port_mutex);
412 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
413 OVS_REQUIRES(dp->port_mutex);
414 static int dpif_netdev_open(const struct dpif_class *, const char *name,
415 bool create, struct dpif **);
416 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
417 struct dpif_packet **, int c,
419 const struct nlattr *actions,
421 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
422 struct dpif_packet **, int cnt);
424 static void dp_netdev_disable_upcall(struct dp_netdev *);
425 void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
426 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
427 struct dp_netdev *dp, int index,
428 int core_id, int numa_id);
429 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
430 static struct dp_netdev_pmd_thread *dp_netdev_get_nonpmd(struct dp_netdev *dp);
431 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
432 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
433 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
434 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
436 static void emc_clear_entry(struct emc_entry *ce);
439 emc_cache_init(struct emc_cache *flow_cache)
443 BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
445 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
446 flow_cache->entries[i].flow = NULL;
447 flow_cache->entries[i].key.hash = 0;
448 flow_cache->entries[i].key.len
449 = offsetof(struct miniflow, inline_values);
450 miniflow_initialize(&flow_cache->entries[i].key.mf,
451 flow_cache->entries[i].key.buf);
456 emc_cache_uninit(struct emc_cache *flow_cache)
460 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
461 emc_clear_entry(&flow_cache->entries[i]);
465 static struct dpif_netdev *
466 dpif_netdev_cast(const struct dpif *dpif)
468 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
469 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
472 static struct dp_netdev *
473 get_dp_netdev(const struct dpif *dpif)
475 return dpif_netdev_cast(dpif)->dp;
479 dpif_netdev_enumerate(struct sset *all_dps,
480 const struct dpif_class *dpif_class)
482 struct shash_node *node;
484 ovs_mutex_lock(&dp_netdev_mutex);
485 SHASH_FOR_EACH(node, &dp_netdevs) {
486 struct dp_netdev *dp = node->data;
487 if (dpif_class != dp->class) {
488 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
489 * If the class doesn't match, skip this dpif. */
492 sset_add(all_dps, node->name);
494 ovs_mutex_unlock(&dp_netdev_mutex);
500 dpif_netdev_class_is_dummy(const struct dpif_class *class)
502 return class != &dpif_netdev_class;
506 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
508 return strcmp(type, "internal") ? type
509 : dpif_netdev_class_is_dummy(class) ? "dummy"
514 create_dpif_netdev(struct dp_netdev *dp)
516 uint16_t netflow_id = hash_string(dp->name, 0);
517 struct dpif_netdev *dpif;
519 ovs_refcount_ref(&dp->ref_cnt);
521 dpif = xmalloc(sizeof *dpif);
522 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
524 dpif->last_port_seq = seq_read(dp->port_seq);
529 /* Choose an unused, non-zero port number and return it on success.
530 * Return ODPP_NONE on failure. */
532 choose_port(struct dp_netdev *dp, const char *name)
533 OVS_REQUIRES(dp->port_mutex)
537 if (dp->class != &dpif_netdev_class) {
541 /* If the port name begins with "br", start the number search at
542 * 100 to make writing tests easier. */
543 if (!strncmp(name, "br", 2)) {
547 /* If the port name contains a number, try to assign that port number.
548 * This can make writing unit tests easier because port numbers are
550 for (p = name; *p != '\0'; p++) {
551 if (isdigit((unsigned char) *p)) {
552 port_no = start_no + strtol(p, NULL, 10);
553 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
554 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
555 return u32_to_odp(port_no);
562 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
563 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
564 return u32_to_odp(port_no);
572 create_dp_netdev(const char *name, const struct dpif_class *class,
573 struct dp_netdev **dpp)
574 OVS_REQUIRES(dp_netdev_mutex)
576 struct dp_netdev *dp;
579 dp = xzalloc(sizeof *dp);
580 shash_add(&dp_netdevs, name, dp);
582 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
583 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
584 ovs_refcount_init(&dp->ref_cnt);
585 atomic_flag_clear(&dp->destroyed);
587 ovs_mutex_init(&dp->flow_mutex);
588 dpcls_init(&dp->cls);
589 cmap_init(&dp->flow_table);
591 ovsthread_stats_init(&dp->stats);
593 ovs_mutex_init(&dp->port_mutex);
594 cmap_init(&dp->ports);
595 dp->port_seq = seq_create();
596 fat_rwlock_init(&dp->upcall_rwlock);
598 /* Disable upcalls by default. */
599 dp_netdev_disable_upcall(dp);
600 dp->upcall_aux = NULL;
601 dp->upcall_cb = NULL;
603 cmap_init(&dp->poll_threads);
604 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
605 ovsthread_key_create(&dp->per_pmd_key, NULL);
607 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
608 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
609 dp_netdev_set_nonpmd(dp);
610 dp->n_dpdk_rxqs = NR_QUEUE;
612 ovs_mutex_lock(&dp->port_mutex);
613 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
614 ovs_mutex_unlock(&dp->port_mutex);
620 dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
626 dpif_netdev_open(const struct dpif_class *class, const char *name,
627 bool create, struct dpif **dpifp)
629 struct dp_netdev *dp;
632 ovs_mutex_lock(&dp_netdev_mutex);
633 dp = shash_find_data(&dp_netdevs, name);
635 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
637 error = (dp->class != class ? EINVAL
642 *dpifp = create_dpif_netdev(dp);
645 ovs_mutex_unlock(&dp_netdev_mutex);
651 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
652 OVS_NO_THREAD_SAFETY_ANALYSIS
654 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
655 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
657 /* Before freeing a lock we should release it */
658 fat_rwlock_unlock(&dp->upcall_rwlock);
659 fat_rwlock_destroy(&dp->upcall_rwlock);
662 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
663 * through the 'dp_netdevs' shash while freeing 'dp'. */
665 dp_netdev_free(struct dp_netdev *dp)
666 OVS_REQUIRES(dp_netdev_mutex)
668 struct dp_netdev_port *port;
669 struct dp_netdev_stats *bucket;
672 shash_find_and_delete(&dp_netdevs, dp->name);
674 dp_netdev_destroy_all_pmds(dp);
675 cmap_destroy(&dp->poll_threads);
676 ovs_mutex_destroy(&dp->non_pmd_mutex);
677 ovsthread_key_delete(dp->per_pmd_key);
679 dp_netdev_flow_flush(dp);
680 ovs_mutex_lock(&dp->port_mutex);
681 CMAP_FOR_EACH (port, node, &dp->ports) {
682 do_del_port(dp, port);
684 ovs_mutex_unlock(&dp->port_mutex);
686 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
687 ovs_mutex_destroy(&bucket->mutex);
688 free_cacheline(bucket);
690 ovsthread_stats_destroy(&dp->stats);
692 dpcls_destroy(&dp->cls);
693 cmap_destroy(&dp->flow_table);
694 ovs_mutex_destroy(&dp->flow_mutex);
695 seq_destroy(dp->port_seq);
696 cmap_destroy(&dp->ports);
698 /* Upcalls must be disabled at this point */
699 dp_netdev_destroy_upcall_lock(dp);
702 free(CONST_CAST(char *, dp->name));
707 dp_netdev_unref(struct dp_netdev *dp)
710 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
711 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
712 ovs_mutex_lock(&dp_netdev_mutex);
713 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
716 ovs_mutex_unlock(&dp_netdev_mutex);
721 dpif_netdev_close(struct dpif *dpif)
723 struct dp_netdev *dp = get_dp_netdev(dpif);
730 dpif_netdev_destroy(struct dpif *dpif)
732 struct dp_netdev *dp = get_dp_netdev(dpif);
734 if (!atomic_flag_test_and_set(&dp->destroyed)) {
735 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
736 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
745 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
747 struct dp_netdev *dp = get_dp_netdev(dpif);
748 struct dp_netdev_stats *bucket;
751 stats->n_flows = cmap_count(&dp->flow_table);
753 stats->n_hit = stats->n_missed = stats->n_lost = 0;
754 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
755 ovs_mutex_lock(&bucket->mutex);
756 stats->n_hit += bucket->n[DP_STAT_HIT];
757 stats->n_missed += bucket->n[DP_STAT_MISS];
758 stats->n_lost += bucket->n[DP_STAT_LOST];
759 ovs_mutex_unlock(&bucket->mutex);
761 stats->n_masks = UINT32_MAX;
762 stats->n_mask_hit = UINT64_MAX;
768 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
772 if (pmd->core_id == NON_PMD_CORE_ID) {
776 ovs_mutex_lock(&pmd->cond_mutex);
777 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
778 ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
779 ovs_mutex_unlock(&pmd->cond_mutex);
782 /* Causes all pmd threads to reload its tx/rx devices.
783 * Must be called after adding/removing ports. */
785 dp_netdev_reload_pmds(struct dp_netdev *dp)
787 struct dp_netdev_pmd_thread *pmd;
789 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
790 dp_netdev_reload_pmd__(pmd);
795 hash_port_no(odp_port_t port_no)
797 return hash_int(odp_to_u32(port_no), 0);
801 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
803 OVS_REQUIRES(dp->port_mutex)
805 struct netdev_saved_flags *sf;
806 struct dp_netdev_port *port;
807 struct netdev *netdev;
808 enum netdev_flags flags;
809 const char *open_type;
813 /* XXX reject devices already in some dp_netdev. */
815 /* Open and validate network device. */
816 open_type = dpif_netdev_port_open_type(dp->class, type);
817 error = netdev_open(devname, open_type, &netdev);
821 /* XXX reject non-Ethernet devices */
823 netdev_get_flags(netdev, &flags);
824 if (flags & NETDEV_LOOPBACK) {
825 VLOG_ERR("%s: cannot add a loopback device", devname);
826 netdev_close(netdev);
830 if (netdev_is_pmd(netdev)) {
831 int n_cores = ovs_numa_get_n_cores();
833 if (n_cores == OVS_CORE_UNSPEC) {
834 VLOG_ERR("%s, cannot get cpu core info", devname);
837 /* There can only be ovs_numa_get_n_cores() pmd threads,
838 * so creates a txq for each. */
839 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
840 if (error && (error != EOPNOTSUPP)) {
841 VLOG_ERR("%s, cannot set multiq", devname);
845 port = xzalloc(sizeof *port);
846 port->port_no = port_no;
847 port->netdev = netdev;
848 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
849 port->type = xstrdup(type);
850 for (i = 0; i < netdev_n_rxq(netdev); i++) {
851 error = netdev_rxq_open(netdev, &port->rxq[i], i);
853 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
854 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
855 devname, ovs_strerror(errno));
856 netdev_close(netdev);
864 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
866 for (i = 0; i < netdev_n_rxq(netdev); i++) {
867 netdev_rxq_close(port->rxq[i]);
869 netdev_close(netdev);
877 ovs_refcount_init(&port->ref_cnt);
878 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
880 if (netdev_is_pmd(netdev)) {
881 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
882 dp_netdev_reload_pmds(dp);
884 seq_change(dp->port_seq);
890 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
891 odp_port_t *port_nop)
893 struct dp_netdev *dp = get_dp_netdev(dpif);
894 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
895 const char *dpif_port;
899 ovs_mutex_lock(&dp->port_mutex);
900 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
901 if (*port_nop != ODPP_NONE) {
903 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
905 port_no = choose_port(dp, dpif_port);
906 error = port_no == ODPP_NONE ? EFBIG : 0;
910 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
912 ovs_mutex_unlock(&dp->port_mutex);
918 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
920 struct dp_netdev *dp = get_dp_netdev(dpif);
923 ovs_mutex_lock(&dp->port_mutex);
924 if (port_no == ODPP_LOCAL) {
927 struct dp_netdev_port *port;
929 error = get_port_by_number(dp, port_no, &port);
931 do_del_port(dp, port);
934 ovs_mutex_unlock(&dp->port_mutex);
940 is_valid_port_number(odp_port_t port_no)
942 return port_no != ODPP_NONE;
945 static struct dp_netdev_port *
946 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
948 struct dp_netdev_port *port;
950 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
951 if (port->port_no == port_no) {
959 get_port_by_number(struct dp_netdev *dp,
960 odp_port_t port_no, struct dp_netdev_port **portp)
962 if (!is_valid_port_number(port_no)) {
966 *portp = dp_netdev_lookup_port(dp, port_no);
967 return *portp ? 0 : ENOENT;
972 port_ref(struct dp_netdev_port *port)
975 ovs_refcount_ref(&port->ref_cnt);
980 port_try_ref(struct dp_netdev_port *port)
983 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
990 port_unref(struct dp_netdev_port *port)
992 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
993 int n_rxq = netdev_n_rxq(port->netdev);
996 netdev_close(port->netdev);
997 netdev_restore_flags(port->sf);
999 for (i = 0; i < n_rxq; i++) {
1000 netdev_rxq_close(port->rxq[i]);
1009 get_port_by_name(struct dp_netdev *dp,
1010 const char *devname, struct dp_netdev_port **portp)
1011 OVS_REQUIRES(dp->port_mutex)
1013 struct dp_netdev_port *port;
1015 CMAP_FOR_EACH (port, node, &dp->ports) {
1016 if (!strcmp(netdev_get_name(port->netdev), devname)) {
1025 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
1027 struct dp_netdev_pmd_thread *pmd;
1030 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1031 if (pmd->numa_id == numa_id) {
1039 /* Returns 'true' if there is a port with pmd netdev and the netdev
1040 * is on numa node 'numa_id'. */
1042 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1044 struct dp_netdev_port *port;
1046 CMAP_FOR_EACH (port, node, &dp->ports) {
1047 if (netdev_is_pmd(port->netdev)
1048 && netdev_get_numa_id(port->netdev) == numa_id) {
1058 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1059 OVS_REQUIRES(dp->port_mutex)
1061 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1062 seq_change(dp->port_seq);
1063 if (netdev_is_pmd(port->netdev)) {
1064 int numa_id = netdev_get_numa_id(port->netdev);
1066 /* If there is no netdev on the numa node, deletes the pmd threads
1067 * for that numa. Else, just reloads the queues. */
1068 if (!has_pmd_port_for_numa(dp, numa_id)) {
1069 dp_netdev_del_pmds_on_numa(dp, numa_id);
1071 dp_netdev_reload_pmds(dp);
1078 answer_port_query(const struct dp_netdev_port *port,
1079 struct dpif_port *dpif_port)
1081 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1082 dpif_port->type = xstrdup(port->type);
1083 dpif_port->port_no = port->port_no;
1087 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1088 struct dpif_port *dpif_port)
1090 struct dp_netdev *dp = get_dp_netdev(dpif);
1091 struct dp_netdev_port *port;
1094 error = get_port_by_number(dp, port_no, &port);
1095 if (!error && dpif_port) {
1096 answer_port_query(port, dpif_port);
1103 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1104 struct dpif_port *dpif_port)
1106 struct dp_netdev *dp = get_dp_netdev(dpif);
1107 struct dp_netdev_port *port;
1110 ovs_mutex_lock(&dp->port_mutex);
1111 error = get_port_by_name(dp, devname, &port);
1112 if (!error && dpif_port) {
1113 answer_port_query(port, dpif_port);
1115 ovs_mutex_unlock(&dp->port_mutex);
1121 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1123 struct dp_netdev_flow_stats *bucket;
1126 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
1127 ovs_mutex_destroy(&bucket->mutex);
1128 free_cacheline(bucket);
1130 ovsthread_stats_destroy(&flow->stats);
1132 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1136 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1138 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1139 ovsrcu_postpone(dp_netdev_flow_free, flow);
1144 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
1145 OVS_REQUIRES(dp->flow_mutex)
1147 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1149 dpcls_remove(&dp->cls, &flow->cr);
1150 cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
1153 dp_netdev_flow_unref(flow);
1157 dp_netdev_flow_flush(struct dp_netdev *dp)
1159 struct dp_netdev_flow *netdev_flow;
1161 ovs_mutex_lock(&dp->flow_mutex);
1162 CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
1163 dp_netdev_remove_flow(dp, netdev_flow);
1165 ovs_mutex_unlock(&dp->flow_mutex);
1169 dpif_netdev_flow_flush(struct dpif *dpif)
1171 struct dp_netdev *dp = get_dp_netdev(dpif);
1173 dp_netdev_flow_flush(dp);
1177 struct dp_netdev_port_state {
1178 struct cmap_position position;
1183 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1185 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1190 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1191 struct dpif_port *dpif_port)
1193 struct dp_netdev_port_state *state = state_;
1194 struct dp_netdev *dp = get_dp_netdev(dpif);
1195 struct cmap_node *node;
1198 node = cmap_next_position(&dp->ports, &state->position);
1200 struct dp_netdev_port *port;
1202 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1205 state->name = xstrdup(netdev_get_name(port->netdev));
1206 dpif_port->name = state->name;
1207 dpif_port->type = port->type;
1208 dpif_port->port_no = port->port_no;
1219 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1221 struct dp_netdev_port_state *state = state_;
1228 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1230 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1231 uint64_t new_port_seq;
1234 new_port_seq = seq_read(dpif->dp->port_seq);
1235 if (dpif->last_port_seq != new_port_seq) {
1236 dpif->last_port_seq = new_port_seq;
1246 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1248 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1250 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1253 static struct dp_netdev_flow *
1254 dp_netdev_flow_cast(const struct dpcls_rule *cr)
1256 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1259 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1261 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1264 /* netdev_flow_key utilities.
1266 * netdev_flow_key is basically a miniflow. We use these functions
1267 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1268 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1270 * - Since we are dealing exclusively with miniflows created by
1271 * miniflow_extract(), if the map is different the miniflow is different.
1272 * Therefore we can be faster by comparing the map and the miniflow in a
1274 * _ netdev_flow_key's miniflow has always inline values.
1275 * - These functions can be inlined by the compiler.
1277 * The following assertions make sure that what we're doing with miniflow is
1280 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1281 == sizeof(uint64_t));
1283 /* Given the number of bits set in the miniflow map, returns the size of the
1284 * 'netdev_flow_key.mf' */
1285 static inline uint32_t
1286 netdev_flow_key_size(uint32_t flow_u32s)
1288 return offsetof(struct miniflow, inline_values) +
1289 MINIFLOW_VALUES_SIZE(flow_u32s);
1293 netdev_flow_key_equal(const struct netdev_flow_key *a,
1294 const struct netdev_flow_key *b)
1296 /* 'b->len' may be not set yet. */
1297 return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
1300 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1301 * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
1302 * generated by miniflow_extract. */
1304 netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
1305 const struct miniflow *mf)
1307 return !memcmp(&key->mf, mf, key->len);
1311 netdev_flow_key_clone(struct netdev_flow_key *dst,
1312 const struct netdev_flow_key *src)
1315 offsetof(struct netdev_flow_key, mf) + src->len);
1320 netdev_flow_key_from_flow(struct netdev_flow_key *dst,
1321 const struct flow *src)
1323 struct ofpbuf packet;
1324 uint64_t buf_stub[512 / 8];
1325 struct pkt_metadata md = pkt_metadata_from_flow(src);
1327 miniflow_initialize(&dst->mf, dst->buf);
1329 ofpbuf_use_stub(&packet, buf_stub, sizeof buf_stub);
1330 flow_compose(&packet, src);
1331 miniflow_extract(&packet, &md, &dst->mf);
1332 ofpbuf_uninit(&packet);
1334 dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
1335 dst->hash = 0; /* Not computed yet. */
1338 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1340 netdev_flow_mask_init(struct netdev_flow_key *mask,
1341 const struct match *match)
1343 const uint32_t *mask_u32 = (const uint32_t *) &match->wc.masks;
1344 uint32_t *dst = mask->mf.inline_values;
1345 uint64_t map, mask_map = 0;
1349 /* Only check masks that make sense for the flow. */
1350 map = flow_wc_map(&match->flow);
1353 uint64_t rm1bit = rightmost_1bit(map);
1354 int i = raw_ctz(map);
1358 *dst++ = mask_u32[i];
1359 hash = hash_add(hash, mask_u32[i]);
1364 mask->mf.values_inline = true;
1365 mask->mf.map = mask_map;
1367 hash = hash_add(hash, mask_map);
1368 hash = hash_add(hash, mask_map >> 32);
1370 n = dst - mask->mf.inline_values;
1372 mask->hash = hash_finish(hash, n * 4);
1373 mask->len = netdev_flow_key_size(n);
1376 /* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
1378 netdev_flow_key_init_masked(struct netdev_flow_key *dst,
1379 const struct flow *flow,
1380 const struct netdev_flow_key *mask)
1382 uint32_t *dst_u32 = dst->mf.inline_values;
1383 const uint32_t *mask_u32 = mask->mf.inline_values;
1387 dst->len = mask->len;
1388 dst->mf.values_inline = true;
1389 dst->mf.map = mask->mf.map;
1391 FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
1392 *dst_u32 = value & *mask_u32++;
1393 hash = hash_add(hash, *dst_u32++);
1395 dst->hash = hash_finish(hash, (dst_u32 - dst->mf.inline_values) * 4);
1398 /* Iterate through all netdev_flow_key u32 values specified by 'MAP' */
1399 #define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
1400 for (struct mf_for_each_in_map_aux aux__ \
1401 = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
1402 mf_get_next_in_map(&aux__, &(VALUE)); \
1405 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1407 static inline uint32_t
1408 netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
1409 const struct netdev_flow_key *mask)
1411 const uint32_t *p = mask->mf.inline_values;
1415 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u32, key, mask->mf.map) {
1416 hash = hash_add(hash, key_u32 & *p++);
1419 return hash_finish(hash, (p - mask->mf.inline_values) * 4);
1423 emc_entry_alive(struct emc_entry *ce)
1425 return ce->flow && !ce->flow->dead;
1429 emc_clear_entry(struct emc_entry *ce)
1432 dp_netdev_flow_unref(ce->flow);
1438 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1439 const struct netdev_flow_key *key)
1441 if (ce->flow != flow) {
1443 dp_netdev_flow_unref(ce->flow);
1446 if (dp_netdev_flow_ref(flow)) {
1453 netdev_flow_key_clone(&ce->key, key);
1458 emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
1459 struct dp_netdev_flow *flow)
1461 struct emc_entry *to_be_replaced = NULL;
1462 struct emc_entry *current_entry;
1464 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1465 if (netdev_flow_key_equal(¤t_entry->key, key)) {
1466 /* We found the entry with the 'mf' miniflow */
1467 emc_change_entry(current_entry, flow, NULL);
1471 /* Replacement policy: put the flow in an empty (not alive) entry, or
1472 * in the first entry where it can be */
1474 || (emc_entry_alive(to_be_replaced)
1475 && !emc_entry_alive(current_entry))
1476 || current_entry->key.hash < to_be_replaced->key.hash) {
1477 to_be_replaced = current_entry;
1480 /* We didn't find the miniflow in the cache.
1481 * The 'to_be_replaced' entry is where the new flow will be stored */
1483 emc_change_entry(to_be_replaced, flow, key);
1486 static inline struct dp_netdev_flow *
1487 emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
1489 struct emc_entry *current_entry;
1491 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1492 if (current_entry->key.hash == key->hash
1493 && emc_entry_alive(current_entry)
1494 && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
1496 /* We found the entry with the 'key->mf' miniflow */
1497 return current_entry->flow;
1504 static struct dp_netdev_flow *
1505 dp_netdev_lookup_flow(const struct dp_netdev *dp,
1506 const struct netdev_flow_key *key)
1508 struct dp_netdev_flow *netdev_flow;
1509 struct dpcls_rule *rule;
1511 dpcls_lookup(&dp->cls, key, &rule, 1);
1512 netdev_flow = dp_netdev_flow_cast(rule);
1517 static struct dp_netdev_flow *
1518 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1520 struct dp_netdev_flow *netdev_flow;
1522 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1524 if (flow_equal(&netdev_flow->flow, flow)) {
1533 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow,
1534 struct dpif_flow_stats *stats)
1536 struct dp_netdev_flow_stats *bucket;
1539 memset(stats, 0, sizeof *stats);
1540 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1541 ovs_mutex_lock(&bucket->mutex);
1542 stats->n_packets += bucket->packet_count;
1543 stats->n_bytes += bucket->byte_count;
1544 stats->used = MAX(stats->used, bucket->used);
1545 stats->tcp_flags |= bucket->tcp_flags;
1546 ovs_mutex_unlock(&bucket->mutex);
1551 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1552 struct ofpbuf *buffer, struct dpif_flow *flow)
1554 struct flow_wildcards wc;
1555 struct dp_netdev_actions *actions;
1557 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1558 odp_flow_key_from_mask(buffer, &wc.masks, &netdev_flow->flow,
1559 odp_to_u32(wc.masks.in_port.odp_port),
1561 flow->mask = ofpbuf_data(buffer);
1562 flow->mask_len = ofpbuf_size(buffer);
1564 actions = dp_netdev_flow_get_actions(netdev_flow);
1565 flow->actions = actions->actions;
1566 flow->actions_len = actions->size;
1568 get_dpif_flow_stats(netdev_flow, &flow->stats);
1572 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1573 const struct nlattr *mask_key,
1574 uint32_t mask_key_len, const struct flow *flow,
1578 enum odp_key_fitness fitness;
1580 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1582 /* This should not happen: it indicates that
1583 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1584 * disagree on the acceptable form of a mask. Log the problem
1585 * as an error, with enough details to enable debugging. */
1586 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1588 if (!VLOG_DROP_ERR(&rl)) {
1592 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1594 VLOG_ERR("internal error parsing flow mask %s (%s)",
1595 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1602 enum mf_field_id id;
1603 /* No mask key, unwildcard everything except fields whose
1604 * prerequisities are not met. */
1605 memset(mask, 0x0, sizeof *mask);
1607 for (id = 0; id < MFF_N_IDS; ++id) {
1608 /* Skip registers and metadata. */
1609 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1610 && id != MFF_METADATA) {
1611 const struct mf_field *mf = mf_from_id(id);
1612 if (mf_are_prereqs_ok(mf, flow)) {
1613 mf_mask_field(mf, mask);
1619 /* Force unwildcard the in_port.
1621 * We need to do this even in the case where we unwildcard "everything"
1622 * above because "everything" only includes the 16-bit OpenFlow port number
1623 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1624 * port number mask->in_port.odp_port. */
1625 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1631 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1636 if (odp_flow_key_to_flow(key, key_len, flow)) {
1637 /* This should not happen: it indicates that odp_flow_key_from_flow()
1638 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1639 * flow. Log the problem as an error, with enough details to enable
1641 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1643 if (!VLOG_DROP_ERR(&rl)) {
1647 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1648 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1655 in_port = flow->in_port.odp_port;
1656 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1664 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1666 struct dp_netdev *dp = get_dp_netdev(dpif);
1667 struct dp_netdev_flow *netdev_flow;
1671 error = dpif_netdev_flow_from_nlattrs(get->key, get->key_len, &key);
1676 netdev_flow = dp_netdev_find_flow(dp, &key);
1679 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->flow);
1687 static struct dp_netdev_flow *
1688 dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
1689 const struct nlattr *actions, size_t actions_len)
1690 OVS_REQUIRES(dp->flow_mutex)
1692 struct dp_netdev_flow *flow;
1693 struct netdev_flow_key mask;
1695 netdev_flow_mask_init(&mask, match);
1696 /* Make sure wc does not have metadata. */
1697 ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
1699 /* Do not allocate extra space. */
1700 flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
1702 *CONST_CAST(struct flow *, &flow->flow) = match->flow;
1703 ovs_refcount_init(&flow->ref_cnt);
1704 ovsthread_stats_init(&flow->stats);
1705 ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
1707 cmap_insert(&dp->flow_table,
1708 CONST_CAST(struct cmap_node *, &flow->node),
1709 flow_hash(&flow->flow, 0));
1710 netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
1711 dpcls_insert(&dp->cls, &flow->cr, &mask);
1713 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1715 struct ds ds = DS_EMPTY_INITIALIZER;
1717 match.flow = flow->flow;
1718 miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
1720 ds_put_cstr(&ds, "flow_add: ");
1721 match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
1722 ds_put_cstr(&ds, ", actions:");
1723 format_odp_actions(&ds, actions, actions_len);
1725 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
1734 clear_stats(struct dp_netdev_flow *netdev_flow)
1736 struct dp_netdev_flow_stats *bucket;
1739 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1740 ovs_mutex_lock(&bucket->mutex);
1742 bucket->packet_count = 0;
1743 bucket->byte_count = 0;
1744 bucket->tcp_flags = 0;
1745 ovs_mutex_unlock(&bucket->mutex);
1750 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1752 struct dp_netdev *dp = get_dp_netdev(dpif);
1753 struct dp_netdev_flow *netdev_flow;
1754 struct netdev_flow_key key;
1758 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
1762 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1763 put->mask, put->mask_len,
1764 &match.flow, &match.wc.masks);
1769 /* Must produce a netdev_flow_key for lookup.
1770 * This interface is no longer performance critical, since it is not used
1771 * for upcall processing any more. */
1772 netdev_flow_key_from_flow(&key, &match.flow);
1774 ovs_mutex_lock(&dp->flow_mutex);
1775 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1777 if (put->flags & DPIF_FP_CREATE) {
1778 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1780 memset(put->stats, 0, sizeof *put->stats);
1782 dp_netdev_flow_add(dp, &match, put->actions, put->actions_len);
1791 if (put->flags & DPIF_FP_MODIFY
1792 && flow_equal(&match.flow, &netdev_flow->flow)) {
1793 struct dp_netdev_actions *new_actions;
1794 struct dp_netdev_actions *old_actions;
1796 new_actions = dp_netdev_actions_create(put->actions,
1799 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1800 ovsrcu_set(&netdev_flow->actions, new_actions);
1803 get_dpif_flow_stats(netdev_flow, put->stats);
1805 if (put->flags & DPIF_FP_ZERO_STATS) {
1806 clear_stats(netdev_flow);
1809 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1810 } else if (put->flags & DPIF_FP_CREATE) {
1813 /* Overlapping flow. */
1817 ovs_mutex_unlock(&dp->flow_mutex);
1823 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1825 struct dp_netdev *dp = get_dp_netdev(dpif);
1826 struct dp_netdev_flow *netdev_flow;
1830 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1835 ovs_mutex_lock(&dp->flow_mutex);
1836 netdev_flow = dp_netdev_find_flow(dp, &key);
1839 get_dpif_flow_stats(netdev_flow, del->stats);
1841 dp_netdev_remove_flow(dp, netdev_flow);
1845 ovs_mutex_unlock(&dp->flow_mutex);
1850 struct dpif_netdev_flow_dump {
1851 struct dpif_flow_dump up;
1852 struct cmap_position pos;
1854 struct ovs_mutex mutex;
1857 static struct dpif_netdev_flow_dump *
1858 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1860 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1863 static struct dpif_flow_dump *
1864 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1866 struct dpif_netdev_flow_dump *dump;
1868 dump = xmalloc(sizeof *dump);
1869 dpif_flow_dump_init(&dump->up, dpif_);
1870 memset(&dump->pos, 0, sizeof dump->pos);
1872 ovs_mutex_init(&dump->mutex);
1878 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1880 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1882 ovs_mutex_destroy(&dump->mutex);
1887 struct dpif_netdev_flow_dump_thread {
1888 struct dpif_flow_dump_thread up;
1889 struct dpif_netdev_flow_dump *dump;
1890 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1891 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1894 static struct dpif_netdev_flow_dump_thread *
1895 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1897 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1900 static struct dpif_flow_dump_thread *
1901 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1903 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1904 struct dpif_netdev_flow_dump_thread *thread;
1906 thread = xmalloc(sizeof *thread);
1907 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1908 thread->dump = dump;
1913 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1915 struct dpif_netdev_flow_dump_thread *thread
1916 = dpif_netdev_flow_dump_thread_cast(thread_);
1922 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1923 struct dpif_flow *flows, int max_flows)
1925 struct dpif_netdev_flow_dump_thread *thread
1926 = dpif_netdev_flow_dump_thread_cast(thread_);
1927 struct dpif_netdev_flow_dump *dump = thread->dump;
1928 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1929 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1930 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1934 ovs_mutex_lock(&dump->mutex);
1935 if (!dump->status) {
1936 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1938 struct cmap_node *node;
1940 node = cmap_next_position(&dp->flow_table, &dump->pos);
1945 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
1949 ovs_mutex_unlock(&dump->mutex);
1951 for (i = 0; i < n_flows; i++) {
1952 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
1953 struct odputil_keybuf *keybuf = &thread->keybuf[i];
1954 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
1955 struct dpif_flow *f = &flows[i];
1956 struct dp_netdev_actions *dp_actions;
1957 struct flow_wildcards wc;
1960 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1963 ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
1964 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1965 netdev_flow->flow.in_port.odp_port, true);
1966 f->key = ofpbuf_data(&buf);
1967 f->key_len = ofpbuf_size(&buf);
1970 ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
1971 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1972 odp_to_u32(wc.masks.in_port.odp_port),
1974 f->mask = ofpbuf_data(&buf);
1975 f->mask_len = ofpbuf_size(&buf);
1978 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1979 f->actions = dp_actions->actions;
1980 f->actions_len = dp_actions->size;
1983 get_dpif_flow_stats(netdev_flow, &f->stats);
1990 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1991 OVS_NO_THREAD_SAFETY_ANALYSIS
1993 struct dp_netdev *dp = get_dp_netdev(dpif);
1994 struct dp_netdev_pmd_thread *pmd;
1995 struct dpif_packet packet, *pp;
1997 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1998 ofpbuf_size(execute->packet) > UINT16_MAX) {
2002 packet.ofpbuf = *execute->packet;
2003 packet.md = execute->md;
2006 /* Tries finding the 'pmd'. If NULL is returned, that means
2007 * the current thread is a non-pmd thread and should use
2008 * dp_netdev_get_nonpmd(). */
2009 pmd = ovsthread_getspecific(dp->per_pmd_key);
2011 pmd = dp_netdev_get_nonpmd(dp);
2014 /* If the current thread is non-pmd thread, acquires
2015 * the 'non_pmd_mutex'. */
2016 if (pmd->core_id == NON_PMD_CORE_ID) {
2017 ovs_mutex_lock(&dp->non_pmd_mutex);
2019 dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
2020 execute->actions_len);
2021 if (pmd->core_id == NON_PMD_CORE_ID) {
2022 ovs_mutex_unlock(&dp->non_pmd_mutex);
2025 /* Even though may_steal is set to false, some actions could modify or
2026 * reallocate the ofpbuf memory. We need to pass those changes to the
2028 *execute->packet = packet.ofpbuf;
2029 execute->md = packet.md;
2034 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
2038 for (i = 0; i < n_ops; i++) {
2039 struct dpif_op *op = ops[i];
2042 case DPIF_OP_FLOW_PUT:
2043 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
2046 case DPIF_OP_FLOW_DEL:
2047 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
2050 case DPIF_OP_EXECUTE:
2051 op->error = dpif_netdev_execute(dpif, &op->u.execute);
2054 case DPIF_OP_FLOW_GET:
2055 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
2061 /* Returns true if the configuration for rx queues or cpu mask
2064 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
2066 if (dp->n_dpdk_rxqs != rxqs) {
2069 if (dp->pmd_cmask != NULL && cmask != NULL) {
2070 return strcmp(dp->pmd_cmask, cmask);
2072 return (dp->pmd_cmask != NULL || cmask != NULL);
2077 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2079 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
2081 struct dp_netdev *dp = get_dp_netdev(dpif);
2083 if (pmd_config_changed(dp, n_rxqs, cmask)) {
2084 struct dp_netdev_port *port;
2086 dp_netdev_destroy_all_pmds(dp);
2088 CMAP_FOR_EACH (port, node, &dp->ports) {
2089 if (netdev_is_pmd(port->netdev)) {
2092 /* Closes the existing 'rxq's. */
2093 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2094 netdev_rxq_close(port->rxq[i]);
2095 port->rxq[i] = NULL;
2098 /* Sets the new rx queue config. */
2099 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
2101 if (err && (err != EOPNOTSUPP)) {
2102 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2103 " %u", netdev_get_name(port->netdev),
2108 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2109 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
2110 * netdev_n_rxq(port->netdev));
2111 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2112 netdev_rxq_open(port->netdev, &port->rxq[i], i);
2116 dp->n_dpdk_rxqs = n_rxqs;
2118 /* Reconfigures the cpu mask. */
2119 ovs_numa_set_cpu_mask(cmask);
2120 free(dp->pmd_cmask);
2121 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
2123 /* Restores the non-pmd. */
2124 dp_netdev_set_nonpmd(dp);
2125 /* Restores all pmd threads. */
2126 dp_netdev_reset_pmd_threads(dp);
2133 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2134 uint32_t queue_id, uint32_t *priority)
2136 *priority = queue_id;
2141 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2142 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2144 struct dp_netdev_actions *
2145 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2147 struct dp_netdev_actions *netdev_actions;
2149 netdev_actions = xmalloc(sizeof *netdev_actions);
2150 netdev_actions->actions = xmemdup(actions, size);
2151 netdev_actions->size = size;
2153 return netdev_actions;
2156 struct dp_netdev_actions *
2157 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2159 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2163 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2165 free(actions->actions);
2171 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2172 struct dp_netdev_port *port,
2173 struct netdev_rxq *rxq)
2175 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2178 error = netdev_rxq_recv(rxq, packets, &cnt);
2182 *recirc_depth_get() = 0;
2184 /* XXX: initialize md in netdev implementation. */
2185 for (i = 0; i < cnt; i++) {
2186 packets[i]->md = PKT_METADATA_INITIALIZER(port->port_no);
2188 dp_netdev_input(pmd, packets, cnt);
2189 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2190 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2192 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2193 netdev_get_name(port->netdev), ovs_strerror(error));
2197 /* Return true if needs to revalidate datapath flows. */
2199 dpif_netdev_run(struct dpif *dpif)
2201 struct dp_netdev_port *port;
2202 struct dp_netdev *dp = get_dp_netdev(dpif);
2203 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_nonpmd(dp);
2204 uint64_t new_tnl_seq;
2206 ovs_mutex_lock(&dp->non_pmd_mutex);
2207 CMAP_FOR_EACH (port, node, &dp->ports) {
2208 if (!netdev_is_pmd(port->netdev)) {
2211 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2212 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2216 ovs_mutex_unlock(&dp->non_pmd_mutex);
2217 tnl_arp_cache_run();
2218 new_tnl_seq = seq_read(tnl_conf_seq);
2220 if (dp->last_tnl_conf_seq != new_tnl_seq) {
2221 dp->last_tnl_conf_seq = new_tnl_seq;
2228 dpif_netdev_wait(struct dpif *dpif)
2230 struct dp_netdev_port *port;
2231 struct dp_netdev *dp = get_dp_netdev(dpif);
2233 ovs_mutex_lock(&dp_netdev_mutex);
2234 CMAP_FOR_EACH (port, node, &dp->ports) {
2235 if (!netdev_is_pmd(port->netdev)) {
2238 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2239 netdev_rxq_wait(port->rxq[i]);
2243 ovs_mutex_unlock(&dp_netdev_mutex);
2244 seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
2248 struct dp_netdev_port *port;
2249 struct netdev_rxq *rx;
2253 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2254 struct rxq_poll **ppoll_list, int poll_cnt)
2256 struct rxq_poll *poll_list = *ppoll_list;
2257 struct dp_netdev_port *port;
2258 int n_pmds_on_numa, index, i;
2260 /* Simple scheduler for netdev rx polling. */
2261 for (i = 0; i < poll_cnt; i++) {
2262 port_unref(poll_list[i].port);
2266 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2269 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2270 /* Calls port_try_ref() to prevent the main thread
2271 * from deleting the port. */
2272 if (port_try_ref(port)) {
2273 if (netdev_is_pmd(port->netdev)
2274 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2277 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2278 if ((index % n_pmds_on_numa) == pmd->index) {
2279 poll_list = xrealloc(poll_list,
2280 sizeof *poll_list * (poll_cnt + 1));
2283 poll_list[poll_cnt].port = port;
2284 poll_list[poll_cnt].rx = port->rxq[i];
2290 /* Unrefs the port_try_ref(). */
2295 *ppoll_list = poll_list;
2300 pmd_thread_main(void *f_)
2302 struct dp_netdev_pmd_thread *pmd = f_;
2303 unsigned int lc = 0;
2304 struct rxq_poll *poll_list;
2305 unsigned int port_seq = PMD_INITIAL_SEQ;
2312 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2313 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2314 pmd_thread_setaffinity_cpu(pmd->core_id);
2316 emc_cache_init(&pmd->flow_cache);
2317 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2319 /* Signal here to make sure the pmd finishes
2320 * reloading the updated configuration. */
2321 dp_netdev_pmd_reload_done(pmd);
2326 for (i = 0; i < poll_cnt; i++) {
2327 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2337 atomic_read_relaxed(&pmd->change_seq, &seq);
2338 if (seq != port_seq) {
2345 emc_cache_uninit(&pmd->flow_cache);
2347 if (!latch_is_set(&pmd->exit_latch)){
2351 for (i = 0; i < poll_cnt; i++) {
2352 port_unref(poll_list[i].port);
2355 dp_netdev_pmd_reload_done(pmd);
2362 dp_netdev_disable_upcall(struct dp_netdev *dp)
2363 OVS_ACQUIRES(dp->upcall_rwlock)
2365 fat_rwlock_wrlock(&dp->upcall_rwlock);
2369 dpif_netdev_disable_upcall(struct dpif *dpif)
2370 OVS_NO_THREAD_SAFETY_ANALYSIS
2372 struct dp_netdev *dp = get_dp_netdev(dpif);
2373 dp_netdev_disable_upcall(dp);
2377 dp_netdev_enable_upcall(struct dp_netdev *dp)
2378 OVS_RELEASES(dp->upcall_rwlock)
2380 fat_rwlock_unlock(&dp->upcall_rwlock);
2384 dpif_netdev_enable_upcall(struct dpif *dpif)
2385 OVS_NO_THREAD_SAFETY_ANALYSIS
2387 struct dp_netdev *dp = get_dp_netdev(dpif);
2388 dp_netdev_enable_upcall(dp);
2392 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
2394 ovs_mutex_lock(&pmd->cond_mutex);
2395 xpthread_cond_signal(&pmd->cond);
2396 ovs_mutex_unlock(&pmd->cond_mutex);
2399 /* Returns the pointer to the dp_netdev_pmd_thread for non-pmd threads. */
2400 static struct dp_netdev_pmd_thread *
2401 dp_netdev_get_nonpmd(struct dp_netdev *dp)
2403 struct dp_netdev_pmd_thread *pmd;
2404 const struct cmap_node *pnode;
2406 pnode = cmap_find(&dp->poll_threads, hash_int(NON_PMD_CORE_ID, 0));
2408 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2413 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2415 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2417 struct dp_netdev_pmd_thread *non_pmd;
2419 non_pmd = xzalloc(sizeof *non_pmd);
2420 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2424 /* Configures the 'pmd' based on the input argument. */
2426 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2427 int index, int core_id, int numa_id)
2431 pmd->core_id = core_id;
2432 pmd->numa_id = numa_id;
2433 latch_init(&pmd->exit_latch);
2434 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2435 xpthread_cond_init(&pmd->cond, NULL);
2436 ovs_mutex_init(&pmd->cond_mutex);
2437 /* init the 'flow_cache' since there is no
2438 * actual thread created for NON_PMD_CORE_ID. */
2439 if (core_id == NON_PMD_CORE_ID) {
2440 emc_cache_init(&pmd->flow_cache);
2442 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2443 hash_int(core_id, 0));
2446 /* Stops the pmd thread, removes it from the 'dp->poll_threads'
2447 * and destroys the struct. */
2449 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2451 /* Uninit the 'flow_cache' since there is
2452 * no actual thread uninit it. */
2453 if (pmd->core_id == NON_PMD_CORE_ID) {
2454 emc_cache_uninit(&pmd->flow_cache);
2456 latch_set(&pmd->exit_latch);
2457 dp_netdev_reload_pmd__(pmd);
2458 ovs_numa_unpin_core(pmd->core_id);
2459 xpthread_join(pmd->thread, NULL);
2461 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2462 latch_destroy(&pmd->exit_latch);
2463 xpthread_cond_destroy(&pmd->cond);
2464 ovs_mutex_destroy(&pmd->cond_mutex);
2468 /* Destroys all pmd threads. */
2470 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2472 struct dp_netdev_pmd_thread *pmd;
2474 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2475 dp_netdev_del_pmd(pmd);
2479 /* Deletes all pmd threads on numa node 'numa_id'. */
2481 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2483 struct dp_netdev_pmd_thread *pmd;
2485 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2486 if (pmd->numa_id == numa_id) {
2487 dp_netdev_del_pmd(pmd);
2492 /* Checks the numa node id of 'netdev' and starts pmd threads for
2495 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2499 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2500 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2501 "invalid", numa_id);
2505 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2507 /* If there are already pmd threads created for the numa node
2508 * in which 'netdev' is on, do nothing. Else, creates the
2509 * pmd threads for the numa node. */
2511 int can_have, n_unpinned, i;
2513 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2515 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2516 "cores on numa node");
2520 /* If cpu mask is specified, uses all unpinned cores, otherwise
2521 * tries creating NR_PMD_THREADS pmd threads. */
2522 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2523 for (i = 0; i < can_have; i++) {
2524 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2525 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2527 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2528 /* Each thread will distribute all devices rx-queues among
2530 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2532 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2538 dp_netdev_flow_stats_new_cb(void)
2540 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2541 ovs_mutex_init(&bucket->mutex);
2545 /* Called after pmd threads config change. Restarts pmd threads with
2546 * new configuration. */
2548 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2550 struct dp_netdev_port *port;
2552 CMAP_FOR_EACH (port, node, &dp->ports) {
2553 if (netdev_is_pmd(port->netdev)) {
2554 int numa_id = netdev_get_numa_id(port->netdev);
2556 dp_netdev_set_pmds_on_numa(dp, numa_id);
2562 dpif_netdev_get_datapath_version(void)
2564 return xstrdup("<built-in>");
2568 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
2572 long long int now = time_msec();
2573 struct dp_netdev_flow_stats *bucket;
2575 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
2576 dp_netdev_flow_stats_new_cb);
2578 ovs_mutex_lock(&bucket->mutex);
2579 bucket->used = MAX(now, bucket->used);
2580 bucket->packet_count += cnt;
2581 bucket->byte_count += size;
2582 bucket->tcp_flags |= tcp_flags;
2583 ovs_mutex_unlock(&bucket->mutex);
2587 dp_netdev_stats_new_cb(void)
2589 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2590 ovs_mutex_init(&bucket->mutex);
2595 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
2597 struct dp_netdev_stats *bucket;
2599 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2600 ovs_mutex_lock(&bucket->mutex);
2601 bucket->n[type] += cnt;
2602 ovs_mutex_unlock(&bucket->mutex);
2606 dp_netdev_upcall(struct dp_netdev *dp, struct dpif_packet *packet_,
2607 struct flow *flow, struct flow_wildcards *wc,
2608 enum dpif_upcall_type type, const struct nlattr *userdata,
2609 struct ofpbuf *actions, struct ofpbuf *put_actions)
2611 struct ofpbuf *packet = &packet_->ofpbuf;
2613 if (type == DPIF_UC_MISS) {
2614 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2617 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2621 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2622 struct ds ds = DS_EMPTY_INITIALIZER;
2626 ofpbuf_init(&key, 0);
2627 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2630 packet_str = ofp_packet_to_string(ofpbuf_data(packet),
2631 ofpbuf_size(packet));
2633 odp_flow_key_format(ofpbuf_data(&key), ofpbuf_size(&key), &ds);
2635 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
2636 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
2638 ofpbuf_uninit(&key);
2643 return dp->upcall_cb(packet, flow, type, userdata, actions, wc,
2644 put_actions, dp->upcall_aux);
2647 static inline uint32_t
2648 dpif_netdev_packet_get_dp_hash(struct dpif_packet *packet,
2649 const struct miniflow *mf)
2653 hash = dpif_packet_get_dp_hash(packet);
2654 if (OVS_UNLIKELY(!hash)) {
2655 hash = miniflow_hash_5tuple(mf, 0);
2656 dpif_packet_set_dp_hash(packet, hash);
2661 struct packet_batch {
2662 unsigned int packet_count;
2663 unsigned int byte_count;
2666 struct dp_netdev_flow *flow;
2668 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2672 packet_batch_update(struct packet_batch *batch, struct dpif_packet *packet,
2673 const struct miniflow *mf)
2675 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2676 batch->packets[batch->packet_count++] = packet;
2677 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2681 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
2685 batch->packet_count = 0;
2686 batch->byte_count = 0;
2687 batch->tcp_flags = 0;
2691 packet_batch_execute(struct packet_batch *batch,
2692 struct dp_netdev_pmd_thread *pmd)
2694 struct dp_netdev_actions *actions;
2695 struct dp_netdev_flow *flow = batch->flow;
2697 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2700 actions = dp_netdev_flow_get_actions(flow);
2702 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
2703 actions->actions, actions->size);
2705 dp_netdev_count_packet(pmd->dp, DP_STAT_HIT, batch->packet_count);
2709 dp_netdev_queue_batches(struct dpif_packet *pkt,
2710 struct dp_netdev_flow *flow, const struct miniflow *mf,
2711 struct packet_batch *batches, size_t *n_batches,
2714 struct packet_batch *batch = NULL;
2717 if (OVS_UNLIKELY(!flow)) {
2720 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2721 * assumption that the number of distinct flows (and therefore the
2722 * number of distinct batches) is quite small. If this turns out not
2723 * to be the case, it may make sense to pre sort based on the
2724 * netdev_flow pointer. That done we can get the appropriate batching
2725 * in O(n * log(n)) instead. */
2726 for (j = *n_batches - 1; j >= 0; j--) {
2727 if (batches[j].flow == flow) {
2728 batch = &batches[j];
2729 packet_batch_update(batch, pkt, mf);
2733 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
2737 batch = &batches[(*n_batches)++];
2738 packet_batch_init(batch, flow);
2739 packet_batch_update(batch, pkt, mf);
2744 dpif_packet_swap(struct dpif_packet **a, struct dpif_packet **b)
2746 struct dpif_packet *tmp = *a;
2751 /* Try to process all ('cnt') the 'packets' using only the exact match cache
2752 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
2753 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
2754 * and the packet pointer is moved at the beginning of the 'packets' array.
2756 * The function returns the number of packets that needs to be processed in the
2757 * 'packets' array (they have been moved to the beginning of the vector).
2759 static inline size_t
2760 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dpif_packet **packets,
2761 size_t cnt, struct netdev_flow_key *keys)
2763 struct netdev_flow_key key;
2764 struct packet_batch batches[4];
2765 struct emc_cache *flow_cache = &pmd->flow_cache;
2766 size_t n_batches, i;
2767 size_t notfound_cnt = 0;
2770 miniflow_initialize(&key.mf, key.buf);
2771 for (i = 0; i < cnt; i++) {
2772 struct dp_netdev_flow *flow;
2774 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2775 dpif_packet_delete(packets[i]);
2779 miniflow_extract(&packets[i]->ofpbuf, &packets[i]->md, &key.mf);
2780 key.len = 0; /* Not computed yet. */
2781 key.hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.mf);
2783 flow = emc_lookup(flow_cache, &key);
2784 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], flow, &key.mf,
2785 batches, &n_batches,
2786 ARRAY_SIZE(batches)))) {
2787 if (i != notfound_cnt) {
2788 dpif_packet_swap(&packets[i], &packets[notfound_cnt]);
2791 keys[notfound_cnt++] = key;
2795 for (i = 0; i < n_batches; i++) {
2796 packet_batch_execute(&batches[i], pmd);
2799 return notfound_cnt;
2803 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
2804 struct dpif_packet **packets, size_t cnt,
2805 struct netdev_flow_key *keys)
2807 #if !defined(__CHECKER__) && !defined(_WIN32)
2808 const size_t PKT_ARRAY_SIZE = cnt;
2810 /* Sparse or MSVC doesn't like variable length array. */
2811 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2813 struct packet_batch batches[PKT_ARRAY_SIZE];
2814 struct dpcls_rule *rules[PKT_ARRAY_SIZE];
2815 struct dp_netdev *dp = pmd->dp;
2816 struct emc_cache *flow_cache = &pmd->flow_cache;
2817 size_t n_batches, i;
2820 for (i = 0; i < cnt; i++) {
2821 /* Key length is needed in all the cases, hash computed on demand. */
2822 keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
2824 any_miss = !dpcls_lookup(&dp->cls, keys, rules, cnt);
2825 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2826 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
2827 struct ofpbuf actions, put_actions;
2829 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
2830 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
2832 for (i = 0; i < cnt; i++) {
2833 struct dp_netdev_flow *netdev_flow;
2834 struct ofpbuf *add_actions;
2838 if (OVS_LIKELY(rules[i])) {
2842 /* It's possible that an earlier slow path execution installed
2843 * a rule covering this flow. In this case, it's a lot cheaper
2844 * to catch it here than execute a miss. */
2845 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2847 rules[i] = &netdev_flow->cr;
2851 miniflow_expand(&keys[i].mf, &match.flow);
2853 ofpbuf_clear(&actions);
2854 ofpbuf_clear(&put_actions);
2856 error = dp_netdev_upcall(dp, packets[i], &match.flow, &match.wc,
2857 DPIF_UC_MISS, NULL, &actions,
2859 if (OVS_UNLIKELY(error && error != ENOSPC)) {
2863 /* We can't allow the packet batching in the next loop to execute
2864 * the actions. Otherwise, if there are any slow path actions,
2865 * we'll send the packet up twice. */
2866 dp_netdev_execute_actions(pmd, &packets[i], 1, true,
2867 ofpbuf_data(&actions),
2868 ofpbuf_size(&actions));
2870 add_actions = ofpbuf_size(&put_actions)
2874 if (OVS_LIKELY(error != ENOSPC)) {
2875 /* XXX: There's a race window where a flow covering this packet
2876 * could have already been installed since we last did the flow
2877 * lookup before upcall. This could be solved by moving the
2878 * mutex lock outside the loop, but that's an awful long time
2879 * to be locking everyone out of making flow installs. If we
2880 * move to a per-core classifier, it would be reasonable. */
2881 ovs_mutex_lock(&dp->flow_mutex);
2882 netdev_flow = dp_netdev_lookup_flow(dp, &keys[i]);
2883 if (OVS_LIKELY(!netdev_flow)) {
2884 netdev_flow = dp_netdev_flow_add(dp, &match,
2885 ofpbuf_data(add_actions),
2886 ofpbuf_size(add_actions));
2888 ovs_mutex_unlock(&dp->flow_mutex);
2890 emc_insert(flow_cache, &keys[i], netdev_flow);
2894 ofpbuf_uninit(&actions);
2895 ofpbuf_uninit(&put_actions);
2896 fat_rwlock_unlock(&dp->upcall_rwlock);
2897 } else if (OVS_UNLIKELY(any_miss)) {
2898 int dropped_cnt = 0;
2900 for (i = 0; i < cnt; i++) {
2901 if (OVS_UNLIKELY(!rules[i])) {
2902 dpif_packet_delete(packets[i]);
2907 dp_netdev_count_packet(dp, DP_STAT_LOST, dropped_cnt);
2911 for (i = 0; i < cnt; i++) {
2912 struct dpif_packet *packet = packets[i];
2913 struct dp_netdev_flow *flow;
2915 if (OVS_UNLIKELY(!rules[i])) {
2919 flow = dp_netdev_flow_cast(rules[i]);
2921 emc_insert(flow_cache, &keys[i], flow);
2922 dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches,
2923 &n_batches, ARRAY_SIZE(batches));
2926 for (i = 0; i < n_batches; i++) {
2927 packet_batch_execute(&batches[i], pmd);
2932 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
2933 struct dpif_packet **packets, int cnt)
2935 #if !defined(__CHECKER__) && !defined(_WIN32)
2936 const size_t PKT_ARRAY_SIZE = cnt;
2938 /* Sparse or MSVC doesn't like variable length array. */
2939 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2941 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
2944 newcnt = emc_processing(pmd, packets, cnt, keys);
2945 if (OVS_UNLIKELY(newcnt)) {
2946 fast_path_processing(pmd, packets, newcnt, keys);
2950 struct dp_netdev_execute_aux {
2951 struct dp_netdev_pmd_thread *pmd;
2955 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
2958 struct dp_netdev *dp = get_dp_netdev(dpif);
2959 dp->upcall_aux = aux;
2964 dp_netdev_drop_packets(struct dpif_packet ** packets, int cnt, bool may_steal)
2969 for (i = 0; i < cnt; i++) {
2970 dpif_packet_delete(packets[i]);
2976 push_tnl_action(const struct dp_netdev *dp,
2977 const struct nlattr *attr,
2978 struct dpif_packet **packets, int cnt)
2980 struct dp_netdev_port *tun_port;
2981 const struct ovs_action_push_tnl *data;
2983 data = nl_attr_get(attr);
2985 tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
2989 netdev_push_header(tun_port->netdev, packets, cnt, data);
2995 dp_netdev_clone_pkt_batch(struct dpif_packet **tnl_pkt,
2996 struct dpif_packet **packets, int cnt)
3000 for (i = 0; i < cnt; i++) {
3001 tnl_pkt[i] = dpif_packet_clone(packets[i]);
3006 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
3007 const struct nlattr *a, bool may_steal)
3008 OVS_NO_THREAD_SAFETY_ANALYSIS
3010 struct dp_netdev_execute_aux *aux = aux_;
3011 uint32_t *depth = recirc_depth_get();
3012 struct dp_netdev_pmd_thread *pmd= aux->pmd;
3013 struct dp_netdev *dp= pmd->dp;
3014 int type = nl_attr_type(a);
3015 struct dp_netdev_port *p;
3018 switch ((enum ovs_action_attr)type) {
3019 case OVS_ACTION_ATTR_OUTPUT:
3020 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
3021 if (OVS_LIKELY(p)) {
3022 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
3027 case OVS_ACTION_ATTR_TUNNEL_PUSH:
3028 if (*depth < MAX_RECIRC_DEPTH) {
3029 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3033 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3037 err = push_tnl_action(dp, a, packets, cnt);
3040 dp_netdev_input(pmd, packets, cnt);
3043 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3049 case OVS_ACTION_ATTR_TUNNEL_POP:
3050 if (*depth < MAX_RECIRC_DEPTH) {
3051 odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
3053 p = dp_netdev_lookup_port(dp, portno);
3055 struct dpif_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3059 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3063 err = netdev_pop_header(p->netdev, packets, cnt);
3066 for (i = 0; i < cnt; i++) {
3067 packets[i]->md.in_port.odp_port = portno;
3071 dp_netdev_input(pmd, packets, cnt);
3074 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3081 case OVS_ACTION_ATTR_USERSPACE:
3082 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3083 const struct nlattr *userdata;
3084 struct ofpbuf actions;
3087 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
3088 ofpbuf_init(&actions, 0);
3090 for (i = 0; i < cnt; i++) {
3093 ofpbuf_clear(&actions);
3095 flow_extract(&packets[i]->ofpbuf, &packets[i]->md, &flow);
3096 error = dp_netdev_upcall(dp, packets[i], &flow, NULL,
3097 DPIF_UC_ACTION, userdata, &actions,
3099 if (!error || error == ENOSPC) {
3100 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
3101 ofpbuf_data(&actions),
3102 ofpbuf_size(&actions));
3103 } else if (may_steal) {
3104 dpif_packet_delete(packets[i]);
3107 ofpbuf_uninit(&actions);
3108 fat_rwlock_unlock(&dp->upcall_rwlock);
3114 case OVS_ACTION_ATTR_HASH: {
3115 const struct ovs_action_hash *hash_act;
3118 hash_act = nl_attr_get(a);
3120 for (i = 0; i < cnt; i++) {
3122 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
3123 /* Hash need not be symmetric, nor does it need to include
3125 hash = hash_2words(dpif_packet_get_dp_hash(packets[i]),
3126 hash_act->hash_basis);
3128 VLOG_WARN("Unknown hash algorithm specified "
3129 "for the hash action.");
3134 hash = 1; /* 0 is not valid */
3137 dpif_packet_set_dp_hash(packets[i], hash);
3142 case OVS_ACTION_ATTR_RECIRC:
3143 if (*depth < MAX_RECIRC_DEPTH) {
3146 for (i = 0; i < cnt; i++) {
3147 struct dpif_packet *recirc_pkt;
3149 recirc_pkt = (may_steal) ? packets[i]
3150 : dpif_packet_clone(packets[i]);
3152 recirc_pkt->md.recirc_id = nl_attr_get_u32(a);
3154 /* Hash is private to each packet */
3155 recirc_pkt->md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
3157 dp_netdev_input(pmd, &recirc_pkt, 1);
3164 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3167 case OVS_ACTION_ATTR_PUSH_VLAN:
3168 case OVS_ACTION_ATTR_POP_VLAN:
3169 case OVS_ACTION_ATTR_PUSH_MPLS:
3170 case OVS_ACTION_ATTR_POP_MPLS:
3171 case OVS_ACTION_ATTR_SET:
3172 case OVS_ACTION_ATTR_SET_MASKED:
3173 case OVS_ACTION_ATTR_SAMPLE:
3174 case OVS_ACTION_ATTR_UNSPEC:
3175 case __OVS_ACTION_ATTR_MAX:
3179 dp_netdev_drop_packets(packets, cnt, may_steal);
3183 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
3184 struct dpif_packet **packets, int cnt,
3186 const struct nlattr *actions, size_t actions_len)
3188 struct dp_netdev_execute_aux aux = { pmd };
3190 odp_execute_actions(&aux, packets, cnt, may_steal, actions,
3191 actions_len, dp_execute_cb);
3194 const struct dpif_class dpif_netdev_class = {
3196 dpif_netdev_enumerate,
3197 dpif_netdev_port_open_type,
3200 dpif_netdev_destroy,
3203 dpif_netdev_get_stats,
3204 dpif_netdev_port_add,
3205 dpif_netdev_port_del,
3206 dpif_netdev_port_query_by_number,
3207 dpif_netdev_port_query_by_name,
3208 NULL, /* port_get_pid */
3209 dpif_netdev_port_dump_start,
3210 dpif_netdev_port_dump_next,
3211 dpif_netdev_port_dump_done,
3212 dpif_netdev_port_poll,
3213 dpif_netdev_port_poll_wait,
3214 dpif_netdev_flow_flush,
3215 dpif_netdev_flow_dump_create,
3216 dpif_netdev_flow_dump_destroy,
3217 dpif_netdev_flow_dump_thread_create,
3218 dpif_netdev_flow_dump_thread_destroy,
3219 dpif_netdev_flow_dump_next,
3220 dpif_netdev_operate,
3221 NULL, /* recv_set */
3222 NULL, /* handlers_set */
3223 dpif_netdev_pmd_set,
3224 dpif_netdev_queue_to_priority,
3226 NULL, /* recv_wait */
3227 NULL, /* recv_purge */
3228 dpif_netdev_register_upcall_cb,
3229 dpif_netdev_enable_upcall,
3230 dpif_netdev_disable_upcall,
3231 dpif_netdev_get_datapath_version,
3235 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
3236 const char *argv[], void *aux OVS_UNUSED)
3238 struct dp_netdev_port *old_port;
3239 struct dp_netdev_port *new_port;
3240 struct dp_netdev *dp;
3243 ovs_mutex_lock(&dp_netdev_mutex);
3244 dp = shash_find_data(&dp_netdevs, argv[1]);
3245 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3246 ovs_mutex_unlock(&dp_netdev_mutex);
3247 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3250 ovs_refcount_ref(&dp->ref_cnt);
3251 ovs_mutex_unlock(&dp_netdev_mutex);
3253 ovs_mutex_lock(&dp->port_mutex);
3254 if (get_port_by_name(dp, argv[2], &old_port)) {
3255 unixctl_command_reply_error(conn, "unknown port");
3259 port_no = u32_to_odp(atoi(argv[3]));
3260 if (!port_no || port_no == ODPP_NONE) {
3261 unixctl_command_reply_error(conn, "bad port number");
3264 if (dp_netdev_lookup_port(dp, port_no)) {
3265 unixctl_command_reply_error(conn, "port number already in use");
3269 /* Remove old port. */
3270 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3271 ovsrcu_postpone(free, old_port);
3273 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3274 new_port = xmemdup(old_port, sizeof *old_port);
3275 new_port->port_no = port_no;
3276 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3278 seq_change(dp->port_seq);
3279 unixctl_command_reply(conn, NULL);
3282 ovs_mutex_unlock(&dp->port_mutex);
3283 dp_netdev_unref(dp);
3287 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3288 const char *argv[], void *aux OVS_UNUSED)
3290 struct dp_netdev_port *port;
3291 struct dp_netdev *dp;
3293 ovs_mutex_lock(&dp_netdev_mutex);
3294 dp = shash_find_data(&dp_netdevs, argv[1]);
3295 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3296 ovs_mutex_unlock(&dp_netdev_mutex);
3297 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3300 ovs_refcount_ref(&dp->ref_cnt);
3301 ovs_mutex_unlock(&dp_netdev_mutex);
3303 ovs_mutex_lock(&dp->port_mutex);
3304 if (get_port_by_name(dp, argv[2], &port)) {
3305 unixctl_command_reply_error(conn, "unknown port");
3306 } else if (port->port_no == ODPP_LOCAL) {
3307 unixctl_command_reply_error(conn, "can't delete local port");
3309 do_del_port(dp, port);
3310 unixctl_command_reply(conn, NULL);
3312 ovs_mutex_unlock(&dp->port_mutex);
3314 dp_netdev_unref(dp);
3318 dpif_dummy_register__(const char *type)
3320 struct dpif_class *class;
3322 class = xmalloc(sizeof *class);
3323 *class = dpif_netdev_class;
3324 class->type = xstrdup(type);
3325 dp_register_provider(class);
3329 dpif_dummy_register(bool override)
3336 dp_enumerate_types(&types);
3337 SSET_FOR_EACH (type, &types) {
3338 if (!dp_unregister_provider(type)) {
3339 dpif_dummy_register__(type);
3342 sset_destroy(&types);
3345 dpif_dummy_register__("dummy");
3347 unixctl_command_register("dpif-dummy/change-port-number",
3348 "dp port new-number",
3349 3, 3, dpif_dummy_change_port_number, NULL);
3350 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3351 2, 2, dpif_dummy_delete_port, NULL);
3354 /* Datapath Classifier. */
3356 /* A set of rules that all have the same fields wildcarded. */
3357 struct dpcls_subtable {
3358 /* The fields are only used by writers. */
3359 struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
3361 /* These fields are accessed by readers. */
3362 struct cmap rules; /* Contains "struct dpcls_rule"s. */
3363 struct netdev_flow_key mask; /* Wildcards for fields (const). */
3364 /* 'mask' must be the last field, additional space is allocated here. */
3367 /* Initializes 'cls' as a classifier that initially contains no classification
3370 dpcls_init(struct dpcls *cls)
3372 cmap_init(&cls->subtables_map);
3373 pvector_init(&cls->subtables);
3377 dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
3379 pvector_remove(&cls->subtables, subtable);
3380 cmap_remove(&cls->subtables_map, &subtable->cmap_node,
3381 subtable->mask.hash);
3382 cmap_destroy(&subtable->rules);
3383 ovsrcu_postpone(free, subtable);
3386 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
3387 * caller's responsibility.
3388 * May only be called after all the readers have been terminated. */
3390 dpcls_destroy(struct dpcls *cls)
3393 struct dpcls_subtable *subtable;
3395 CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
3396 dpcls_destroy_subtable(cls, subtable);
3398 cmap_destroy(&cls->subtables_map);
3399 pvector_destroy(&cls->subtables);
3403 static struct dpcls_subtable *
3404 dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3406 struct dpcls_subtable *subtable;
3408 /* Need to add one. */
3409 subtable = xmalloc(sizeof *subtable
3410 - sizeof subtable->mask.mf + mask->len);
3411 cmap_init(&subtable->rules);
3412 netdev_flow_key_clone(&subtable->mask, mask);
3413 cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
3414 pvector_insert(&cls->subtables, subtable, 0);
3419 static inline struct dpcls_subtable *
3420 dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3422 struct dpcls_subtable *subtable;
3424 CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
3425 &cls->subtables_map) {
3426 if (netdev_flow_key_equal(&subtable->mask, mask)) {
3430 return dpcls_create_subtable(cls, mask);
3433 /* Insert 'rule' into 'cls'. */
3435 dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
3436 const struct netdev_flow_key *mask)
3438 struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
3440 rule->mask = &subtable->mask;
3441 cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
3444 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
3446 dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
3448 struct dpcls_subtable *subtable;
3450 ovs_assert(rule->mask);
3452 INIT_CONTAINER(subtable, rule->mask, mask);
3454 if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
3456 dpcls_destroy_subtable(cls, subtable);
3460 /* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
3461 * in 'mask' the values in 'key' and 'target' are the same.
3463 * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
3465 dpcls_rule_matches_key(const struct dpcls_rule *rule,
3466 const struct netdev_flow_key *target)
3468 const uint32_t *keyp = rule->flow.mf.inline_values;
3469 const uint32_t *maskp = rule->mask->mf.inline_values;
3470 uint32_t target_u32;
3472 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u32, target, rule->flow.mf.map) {
3473 if (OVS_UNLIKELY((target_u32 & *maskp++) != *keyp++)) {
3480 /* For each miniflow in 'flows' performs a classifier lookup writing the result
3481 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
3482 * NULL it is skipped.
3484 * This function is optimized for use in the userspace datapath and therefore
3485 * does not implement a lot of features available in the standard
3486 * classifier_lookup() function. Specifically, it does not implement
3487 * priorities, instead returning any rule which matches the flow.
3489 * Returns true if all flows found a corresponding rule. */
3491 dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
3492 struct dpcls_rule **rules, const size_t cnt)
3494 /* The batch size 16 was experimentally found faster than 8 or 32. */
3495 typedef uint16_t map_type;
3496 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
3498 #if !defined(__CHECKER__) && !defined(_WIN32)
3499 const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
3501 enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_RX_BATCH, MAP_BITS) };
3503 map_type maps[N_MAPS];
3504 struct dpcls_subtable *subtable;
3506 memset(maps, 0xff, sizeof maps);
3507 if (cnt % MAP_BITS) {
3508 maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
3510 memset(rules, 0, cnt * sizeof *rules);
3512 PVECTOR_FOR_EACH (subtable, &cls->subtables) {
3513 const struct netdev_flow_key *mkeys = keys;
3514 struct dpcls_rule **mrules = rules;
3515 map_type remains = 0;
3518 BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
3520 for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
3521 uint32_t hashes[MAP_BITS];
3522 const struct cmap_node *nodes[MAP_BITS];
3523 unsigned long map = maps[m];
3527 continue; /* Skip empty maps. */
3530 /* Compute hashes for the remaining keys. */
3531 ULONG_FOR_EACH_1(i, map) {
3532 hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
3536 map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
3537 /* Check results. */
3538 ULONG_FOR_EACH_1(i, map) {
3539 struct dpcls_rule *rule;
3541 CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
3542 if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
3547 ULONG_SET0(map, i); /* Did not match. */
3549 ; /* Keep Sparse happy. */
3551 maps[m] &= ~map; /* Clear the found rules. */
3555 return true; /* All found. */
3558 return false; /* Some misses. */