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>
36 #include "dp-packet.h"
38 #include "dpif-provider.h"
40 #include "dynamic-string.h"
41 #include "fat-rwlock.h"
47 #include "meta-flow.h"
49 #include "netdev-dpdk.h"
50 #include "netdev-vport.h"
52 #include "odp-execute.h"
54 #include "ofp-print.h"
59 #include "poll-loop.h"
66 #include "tnl-arp-cache.h"
69 #include "openvswitch/vlog.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 uint64_t buf[FLOW_MAX_PACKET_U64S - 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)
182 const struct dpif_class *const class;
183 const char *const name;
185 struct ovs_refcount ref_cnt;
186 atomic_flag destroyed;
190 * Protected by RCU. Take the mutex to add or remove ports. */
191 struct ovs_mutex port_mutex;
193 struct seq *port_seq; /* Incremented whenever a port changes. */
195 /* Protects access to ofproto-dpif-upcall interface during revalidator
196 * thread synchronization. */
197 struct fat_rwlock upcall_rwlock;
198 upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
201 /* Stores all 'struct dp_netdev_pmd_thread's. */
202 struct cmap poll_threads;
204 /* Protects the access of the 'struct dp_netdev_pmd_thread'
205 * instance for non-pmd thread. */
206 struct ovs_mutex non_pmd_mutex;
208 /* Each pmd thread will store its pointer to
209 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
210 ovsthread_key_t per_pmd_key;
212 /* Number of rx queues for each dpdk interface and the cpu mask
213 * for pin of pmd threads. */
216 uint64_t last_tnl_conf_seq;
219 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
223 DP_STAT_EXACT_HIT, /* Packets that had an exact match (emc). */
224 DP_STAT_MASKED_HIT, /* Packets that matched in the flow table. */
225 DP_STAT_MISS, /* Packets that did not match. */
226 DP_STAT_LOST, /* Packets not passed up to the client. */
230 enum pmd_cycles_counter_type {
231 PMD_CYCLES_POLLING, /* Cycles spent polling NICs. */
232 PMD_CYCLES_PROCESSING, /* Cycles spent processing packets */
236 /* A port in a netdev-based datapath. */
237 struct dp_netdev_port {
238 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
240 struct netdev *netdev;
241 struct netdev_saved_flags *sf;
242 struct netdev_rxq **rxq;
243 struct ovs_refcount ref_cnt;
244 char *type; /* Port type as requested by user. */
247 /* Contained by struct dp_netdev_flow's 'stats' member. */
248 struct dp_netdev_flow_stats {
249 atomic_llong used; /* Last used time, in monotonic msecs. */
250 atomic_ullong packet_count; /* Number of packets matched. */
251 atomic_ullong byte_count; /* Number of bytes matched. */
252 atomic_uint16_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
255 /* A flow in 'dp_netdev_pmd_thread's 'flow_table'.
261 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
262 * its pmd thread's classifier. The text below calls this classifier 'cls'.
267 * The thread safety rules described here for "struct dp_netdev_flow" are
268 * motivated by two goals:
270 * - Prevent threads that read members of "struct dp_netdev_flow" from
271 * reading bad data due to changes by some thread concurrently modifying
274 * - Prevent two threads making changes to members of a given "struct
275 * dp_netdev_flow" from interfering with each other.
281 * A flow 'flow' may be accessed without a risk of being freed during an RCU
282 * grace period. Code that needs to hold onto a flow for a while
283 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
285 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
286 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
289 * Some members, marked 'const', are immutable. Accessing other members
290 * requires synchronization, as noted in more detail below.
292 struct dp_netdev_flow {
295 /* Hash table index by unmasked flow. */
296 const struct cmap_node node; /* In owning dp_netdev_pmd_thread's */
298 const ovs_u128 ufid; /* Unique flow identifier. */
299 const struct flow flow; /* Unmasked flow that created this entry. */
300 const int pmd_id; /* The 'core_id' of pmd thread owning this */
303 /* Number of references.
304 * The classifier owns one reference.
305 * Any thread trying to keep a rule from being freed should hold its own
307 struct ovs_refcount ref_cnt;
310 struct dp_netdev_flow_stats stats;
313 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
315 /* Packet classification. */
316 struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
317 /* 'cr' must be the last member. */
320 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
321 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
322 static int dpif_netdev_flow_from_nlattrs(const struct nlattr *, uint32_t,
325 /* A set of datapath actions within a "struct dp_netdev_flow".
331 * A struct dp_netdev_actions 'actions' is protected with RCU. */
332 struct dp_netdev_actions {
333 /* These members are immutable: they do not change during the struct's
335 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
336 unsigned int size; /* Size of 'actions', in bytes. */
339 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
341 struct dp_netdev_actions *dp_netdev_flow_get_actions(
342 const struct dp_netdev_flow *);
343 static void dp_netdev_actions_free(struct dp_netdev_actions *);
345 /* Contained by struct dp_netdev_pmd_thread's 'stats' member. */
346 struct dp_netdev_pmd_stats {
347 /* Indexed by DP_STAT_*. */
348 atomic_ullong n[DP_N_STATS];
351 /* Contained by struct dp_netdev_pmd_thread's 'cycle' member. */
352 struct dp_netdev_pmd_cycles {
353 /* Indexed by PMD_CYCLES_*. */
354 atomic_ullong n[PMD_N_CYCLES];
357 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
358 * the performance overhead of interrupt processing. Therefore netdev can
359 * not implement rx-wait for these devices. dpif-netdev needs to poll
360 * these device to check for recv buffer. pmd-thread does polling for
361 * devices assigned to itself.
363 * DPDK used PMD for accessing NIC.
365 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
366 * I/O of all non-pmd threads. There will be no actual thread created
369 * Each struct has its own flow table and classifier. Packets received
370 * from managed ports are looked up in the corresponding pmd thread's
371 * flow table, and are executed with the found actions.
373 struct dp_netdev_pmd_thread {
374 struct dp_netdev *dp;
375 struct ovs_refcount ref_cnt; /* Every reference must be refcount'ed. */
376 struct cmap_node node; /* In 'dp->poll_threads'. */
378 pthread_cond_t cond; /* For synchronizing pmd thread reload. */
379 struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
381 /* Per thread exact-match cache. Note, the instance for cpu core
382 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
383 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
384 * instances will only be accessed by its own pmd thread. */
385 struct emc_cache flow_cache;
387 /* Classifier and Flow-Table.
389 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
390 * changes to 'cls' must be made while still holding the 'flow_mutex'.
392 struct ovs_mutex flow_mutex;
394 struct cmap flow_table OVS_GUARDED; /* Flow table. */
397 struct dp_netdev_pmd_stats stats;
399 /* Cycles counters */
400 struct dp_netdev_pmd_cycles cycles;
402 /* Used to count cicles. See 'cycles_counter_end()' */
403 unsigned long long last_cycles;
405 struct latch exit_latch; /* For terminating the pmd thread. */
406 atomic_uint change_seq; /* For reloading pmd ports. */
408 int index; /* Idx of this pmd thread among pmd*/
409 /* threads on same numa node. */
410 int core_id; /* CPU core id of this pmd thread. */
411 int numa_id; /* numa node id of this pmd thread. */
413 /* Only a pmd thread can write on its own 'cycles' and 'stats'.
414 * The main thread keeps 'stats_zero' and 'cycles_zero' as base
415 * values and subtracts them from 'stats' and 'cycles' before
416 * reporting to the user */
417 unsigned long long stats_zero[DP_N_STATS];
418 uint64_t cycles_zero[PMD_N_CYCLES];
421 #define PMD_INITIAL_SEQ 1
423 /* Interface to netdev-based datapath. */
426 struct dp_netdev *dp;
427 uint64_t last_port_seq;
430 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
431 struct dp_netdev_port **portp);
432 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
433 struct dp_netdev_port **portp);
434 static void dp_netdev_free(struct dp_netdev *)
435 OVS_REQUIRES(dp_netdev_mutex);
436 static int do_add_port(struct dp_netdev *dp, const char *devname,
437 const char *type, odp_port_t port_no)
438 OVS_REQUIRES(dp->port_mutex);
439 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
440 OVS_REQUIRES(dp->port_mutex);
441 static int dpif_netdev_open(const struct dpif_class *, const char *name,
442 bool create, struct dpif **);
443 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
444 struct dp_packet **, int c,
446 const struct nlattr *actions,
448 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
449 struct dp_packet **, int cnt);
451 static void dp_netdev_disable_upcall(struct dp_netdev *);
452 void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
453 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
454 struct dp_netdev *dp, int index,
455 int core_id, int numa_id);
456 static void dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd);
457 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
458 static struct dp_netdev_pmd_thread *dp_netdev_get_pmd(struct dp_netdev *dp,
460 static struct dp_netdev_pmd_thread *
461 dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos);
462 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
463 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
464 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
465 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
466 static bool dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd);
467 static void dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd);
468 static void dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd);
470 static inline bool emc_entry_alive(struct emc_entry *ce);
471 static void emc_clear_entry(struct emc_entry *ce);
474 emc_cache_init(struct emc_cache *flow_cache)
478 BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
480 flow_cache->sweep_idx = 0;
481 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
482 flow_cache->entries[i].flow = NULL;
483 flow_cache->entries[i].key.hash = 0;
484 flow_cache->entries[i].key.len
485 = offsetof(struct miniflow, inline_values);
486 miniflow_initialize(&flow_cache->entries[i].key.mf,
487 flow_cache->entries[i].key.buf);
492 emc_cache_uninit(struct emc_cache *flow_cache)
496 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
497 emc_clear_entry(&flow_cache->entries[i]);
501 /* Check and clear dead flow references slowly (one entry at each
504 emc_cache_slow_sweep(struct emc_cache *flow_cache)
506 struct emc_entry *entry = &flow_cache->entries[flow_cache->sweep_idx];
508 if (!emc_entry_alive(entry)) {
509 emc_clear_entry(entry);
511 flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
514 static struct dpif_netdev *
515 dpif_netdev_cast(const struct dpif *dpif)
517 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
518 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
521 static struct dp_netdev *
522 get_dp_netdev(const struct dpif *dpif)
524 return dpif_netdev_cast(dpif)->dp;
528 PMD_INFO_SHOW_STATS, /* show how cpu cycles are spent */
529 PMD_INFO_CLEAR_STATS /* set the cycles count to 0 */
533 pmd_info_show_stats(struct ds *reply,
534 struct dp_netdev_pmd_thread *pmd,
535 unsigned long long stats[DP_N_STATS],
536 uint64_t cycles[PMD_N_CYCLES])
538 unsigned long long total_packets = 0;
539 uint64_t total_cycles = 0;
542 /* These loops subtracts reference values ('*_zero') from the counters.
543 * Since loads and stores are relaxed, it might be possible for a '*_zero'
544 * value to be more recent than the current value we're reading from the
545 * counter. This is not a big problem, since these numbers are not
546 * supposed to be too accurate, but we should at least make sure that
547 * the result is not negative. */
548 for (i = 0; i < DP_N_STATS; i++) {
549 if (stats[i] > pmd->stats_zero[i]) {
550 stats[i] -= pmd->stats_zero[i];
555 if (i != DP_STAT_LOST) {
556 /* Lost packets are already included in DP_STAT_MISS */
557 total_packets += stats[i];
561 for (i = 0; i < PMD_N_CYCLES; i++) {
562 if (cycles[i] > pmd->cycles_zero[i]) {
563 cycles[i] -= pmd->cycles_zero[i];
568 total_cycles += cycles[i];
571 ds_put_cstr(reply, (pmd->core_id == NON_PMD_CORE_ID)
572 ? "main thread" : "pmd thread");
574 if (pmd->numa_id != OVS_NUMA_UNSPEC) {
575 ds_put_format(reply, " numa_id %d", pmd->numa_id);
577 if (pmd->core_id != OVS_CORE_UNSPEC) {
578 ds_put_format(reply, " core_id %d", pmd->core_id);
580 ds_put_cstr(reply, ":\n");
583 "\temc hits:%llu\n\tmegaflow hits:%llu\n"
584 "\tmiss:%llu\n\tlost:%llu\n",
585 stats[DP_STAT_EXACT_HIT], stats[DP_STAT_MASKED_HIT],
586 stats[DP_STAT_MISS], stats[DP_STAT_LOST]);
588 if (total_cycles == 0) {
593 "\tpolling cycles:%"PRIu64" (%.02f%%)\n"
594 "\tprocessing cycles:%"PRIu64" (%.02f%%)\n",
595 cycles[PMD_CYCLES_POLLING],
596 cycles[PMD_CYCLES_POLLING] / (double)total_cycles * 100,
597 cycles[PMD_CYCLES_PROCESSING],
598 cycles[PMD_CYCLES_PROCESSING] / (double)total_cycles * 100);
600 if (total_packets == 0) {
605 "\tavg cycles per packet: %.02f (%"PRIu64"/%llu)\n",
606 total_cycles / (double)total_packets,
607 total_cycles, total_packets);
610 "\tavg processing cycles per packet: "
611 "%.02f (%"PRIu64"/%llu)\n",
612 cycles[PMD_CYCLES_PROCESSING] / (double)total_packets,
613 cycles[PMD_CYCLES_PROCESSING], total_packets);
617 pmd_info_clear_stats(struct ds *reply OVS_UNUSED,
618 struct dp_netdev_pmd_thread *pmd,
619 unsigned long long stats[DP_N_STATS],
620 uint64_t cycles[PMD_N_CYCLES])
624 /* We cannot write 'stats' and 'cycles' (because they're written by other
625 * threads) and we shouldn't change 'stats' (because they're used to count
626 * datapath stats, which must not be cleared here). Instead, we save the
627 * current values and subtract them from the values to be displayed in the
629 for (i = 0; i < DP_N_STATS; i++) {
630 pmd->stats_zero[i] = stats[i];
632 for (i = 0; i < PMD_N_CYCLES; i++) {
633 pmd->cycles_zero[i] = cycles[i];
638 dpif_netdev_pmd_info(struct unixctl_conn *conn, int argc, const char *argv[],
641 struct ds reply = DS_EMPTY_INITIALIZER;
642 struct dp_netdev_pmd_thread *pmd;
643 struct dp_netdev *dp = NULL;
644 enum pmd_info_type type = *(enum pmd_info_type *) aux;
646 ovs_mutex_lock(&dp_netdev_mutex);
649 dp = shash_find_data(&dp_netdevs, argv[1]);
650 } else if (shash_count(&dp_netdevs) == 1) {
651 /* There's only one datapath */
652 dp = shash_first(&dp_netdevs)->data;
656 ovs_mutex_unlock(&dp_netdev_mutex);
657 unixctl_command_reply_error(conn,
658 "please specify an existing datapath");
662 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
663 unsigned long long stats[DP_N_STATS];
664 uint64_t cycles[PMD_N_CYCLES];
667 /* Read current stats and cycle counters */
668 for (i = 0; i < ARRAY_SIZE(stats); i++) {
669 atomic_read_relaxed(&pmd->stats.n[i], &stats[i]);
671 for (i = 0; i < ARRAY_SIZE(cycles); i++) {
672 atomic_read_relaxed(&pmd->cycles.n[i], &cycles[i]);
675 if (type == PMD_INFO_CLEAR_STATS) {
676 pmd_info_clear_stats(&reply, pmd, stats, cycles);
677 } else if (type == PMD_INFO_SHOW_STATS) {
678 pmd_info_show_stats(&reply, pmd, stats, cycles);
682 ovs_mutex_unlock(&dp_netdev_mutex);
684 unixctl_command_reply(conn, ds_cstr(&reply));
689 dpif_netdev_init(void)
691 static enum pmd_info_type show_aux = PMD_INFO_SHOW_STATS,
692 clear_aux = PMD_INFO_CLEAR_STATS;
694 unixctl_command_register("dpif-netdev/pmd-stats-show", "[dp]",
695 0, 1, dpif_netdev_pmd_info,
697 unixctl_command_register("dpif-netdev/pmd-stats-clear", "[dp]",
698 0, 1, dpif_netdev_pmd_info,
704 dpif_netdev_enumerate(struct sset *all_dps,
705 const struct dpif_class *dpif_class)
707 struct shash_node *node;
709 ovs_mutex_lock(&dp_netdev_mutex);
710 SHASH_FOR_EACH(node, &dp_netdevs) {
711 struct dp_netdev *dp = node->data;
712 if (dpif_class != dp->class) {
713 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
714 * If the class doesn't match, skip this dpif. */
717 sset_add(all_dps, node->name);
719 ovs_mutex_unlock(&dp_netdev_mutex);
725 dpif_netdev_class_is_dummy(const struct dpif_class *class)
727 return class != &dpif_netdev_class;
731 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
733 return strcmp(type, "internal") ? type
734 : dpif_netdev_class_is_dummy(class) ? "dummy"
739 create_dpif_netdev(struct dp_netdev *dp)
741 uint16_t netflow_id = hash_string(dp->name, 0);
742 struct dpif_netdev *dpif;
744 ovs_refcount_ref(&dp->ref_cnt);
746 dpif = xmalloc(sizeof *dpif);
747 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
749 dpif->last_port_seq = seq_read(dp->port_seq);
754 /* Choose an unused, non-zero port number and return it on success.
755 * Return ODPP_NONE on failure. */
757 choose_port(struct dp_netdev *dp, const char *name)
758 OVS_REQUIRES(dp->port_mutex)
762 if (dp->class != &dpif_netdev_class) {
766 /* If the port name begins with "br", start the number search at
767 * 100 to make writing tests easier. */
768 if (!strncmp(name, "br", 2)) {
772 /* If the port name contains a number, try to assign that port number.
773 * This can make writing unit tests easier because port numbers are
775 for (p = name; *p != '\0'; p++) {
776 if (isdigit((unsigned char) *p)) {
777 port_no = start_no + strtol(p, NULL, 10);
778 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
779 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
780 return u32_to_odp(port_no);
787 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
788 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
789 return u32_to_odp(port_no);
797 create_dp_netdev(const char *name, const struct dpif_class *class,
798 struct dp_netdev **dpp)
799 OVS_REQUIRES(dp_netdev_mutex)
801 struct dp_netdev *dp;
804 dp = xzalloc(sizeof *dp);
805 shash_add(&dp_netdevs, name, dp);
807 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
808 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
809 ovs_refcount_init(&dp->ref_cnt);
810 atomic_flag_clear(&dp->destroyed);
812 ovs_mutex_init(&dp->port_mutex);
813 cmap_init(&dp->ports);
814 dp->port_seq = seq_create();
815 fat_rwlock_init(&dp->upcall_rwlock);
817 /* Disable upcalls by default. */
818 dp_netdev_disable_upcall(dp);
819 dp->upcall_aux = NULL;
820 dp->upcall_cb = NULL;
822 cmap_init(&dp->poll_threads);
823 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
824 ovsthread_key_create(&dp->per_pmd_key, NULL);
826 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
827 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
828 dp_netdev_set_nonpmd(dp);
829 dp->n_dpdk_rxqs = NR_QUEUE;
831 ovs_mutex_lock(&dp->port_mutex);
832 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
833 ovs_mutex_unlock(&dp->port_mutex);
839 dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
845 dpif_netdev_open(const struct dpif_class *class, const char *name,
846 bool create, struct dpif **dpifp)
848 struct dp_netdev *dp;
851 ovs_mutex_lock(&dp_netdev_mutex);
852 dp = shash_find_data(&dp_netdevs, name);
854 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
856 error = (dp->class != class ? EINVAL
861 *dpifp = create_dpif_netdev(dp);
864 ovs_mutex_unlock(&dp_netdev_mutex);
870 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
871 OVS_NO_THREAD_SAFETY_ANALYSIS
873 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
874 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
876 /* Before freeing a lock we should release it */
877 fat_rwlock_unlock(&dp->upcall_rwlock);
878 fat_rwlock_destroy(&dp->upcall_rwlock);
881 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
882 * through the 'dp_netdevs' shash while freeing 'dp'. */
884 dp_netdev_free(struct dp_netdev *dp)
885 OVS_REQUIRES(dp_netdev_mutex)
887 struct dp_netdev_port *port;
889 shash_find_and_delete(&dp_netdevs, dp->name);
891 dp_netdev_destroy_all_pmds(dp);
892 cmap_destroy(&dp->poll_threads);
893 ovs_mutex_destroy(&dp->non_pmd_mutex);
894 ovsthread_key_delete(dp->per_pmd_key);
896 ovs_mutex_lock(&dp->port_mutex);
897 CMAP_FOR_EACH (port, node, &dp->ports) {
898 do_del_port(dp, port);
900 ovs_mutex_unlock(&dp->port_mutex);
902 seq_destroy(dp->port_seq);
903 cmap_destroy(&dp->ports);
905 /* Upcalls must be disabled at this point */
906 dp_netdev_destroy_upcall_lock(dp);
909 free(CONST_CAST(char *, dp->name));
914 dp_netdev_unref(struct dp_netdev *dp)
917 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
918 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
919 ovs_mutex_lock(&dp_netdev_mutex);
920 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
923 ovs_mutex_unlock(&dp_netdev_mutex);
928 dpif_netdev_close(struct dpif *dpif)
930 struct dp_netdev *dp = get_dp_netdev(dpif);
937 dpif_netdev_destroy(struct dpif *dpif)
939 struct dp_netdev *dp = get_dp_netdev(dpif);
941 if (!atomic_flag_test_and_set(&dp->destroyed)) {
942 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
943 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
951 /* Add 'n' to the atomic variable 'var' non-atomically and using relaxed
952 * load/store semantics. While the increment is not atomic, the load and
953 * store operations are, making it impossible to read inconsistent values.
955 * This is used to update thread local stats counters. */
957 non_atomic_ullong_add(atomic_ullong *var, unsigned long long n)
959 unsigned long long tmp;
961 atomic_read_relaxed(var, &tmp);
963 atomic_store_relaxed(var, tmp);
967 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
969 struct dp_netdev *dp = get_dp_netdev(dpif);
970 struct dp_netdev_pmd_thread *pmd;
972 stats->n_flows = stats->n_hit = stats->n_missed = stats->n_lost = 0;
973 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
974 unsigned long long n;
975 stats->n_flows += cmap_count(&pmd->flow_table);
977 atomic_read_relaxed(&pmd->stats.n[DP_STAT_MASKED_HIT], &n);
979 atomic_read_relaxed(&pmd->stats.n[DP_STAT_EXACT_HIT], &n);
981 atomic_read_relaxed(&pmd->stats.n[DP_STAT_MISS], &n);
982 stats->n_missed += n;
983 atomic_read_relaxed(&pmd->stats.n[DP_STAT_LOST], &n);
986 stats->n_masks = UINT32_MAX;
987 stats->n_mask_hit = UINT64_MAX;
993 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
997 if (pmd->core_id == NON_PMD_CORE_ID) {
1001 ovs_mutex_lock(&pmd->cond_mutex);
1002 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
1003 ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
1004 ovs_mutex_unlock(&pmd->cond_mutex);
1007 /* Causes all pmd threads to reload its tx/rx devices.
1008 * Must be called after adding/removing ports. */
1010 dp_netdev_reload_pmds(struct dp_netdev *dp)
1012 struct dp_netdev_pmd_thread *pmd;
1014 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1015 dp_netdev_reload_pmd__(pmd);
1020 hash_port_no(odp_port_t port_no)
1022 return hash_int(odp_to_u32(port_no), 0);
1026 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
1028 OVS_REQUIRES(dp->port_mutex)
1030 struct netdev_saved_flags *sf;
1031 struct dp_netdev_port *port;
1032 struct netdev *netdev;
1033 enum netdev_flags flags;
1034 const char *open_type;
1038 /* Reject devices already in 'dp'. */
1039 if (!get_port_by_name(dp, devname, &port)) {
1043 /* Open and validate network device. */
1044 open_type = dpif_netdev_port_open_type(dp->class, type);
1045 error = netdev_open(devname, open_type, &netdev);
1049 /* XXX reject non-Ethernet devices */
1051 netdev_get_flags(netdev, &flags);
1052 if (flags & NETDEV_LOOPBACK) {
1053 VLOG_ERR("%s: cannot add a loopback device", devname);
1054 netdev_close(netdev);
1058 if (netdev_is_pmd(netdev)) {
1059 int n_cores = ovs_numa_get_n_cores();
1061 if (n_cores == OVS_CORE_UNSPEC) {
1062 VLOG_ERR("%s, cannot get cpu core info", devname);
1065 /* There can only be ovs_numa_get_n_cores() pmd threads,
1066 * so creates a txq for each. */
1067 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
1068 if (error && (error != EOPNOTSUPP)) {
1069 VLOG_ERR("%s, cannot set multiq", devname);
1073 port = xzalloc(sizeof *port);
1074 port->port_no = port_no;
1075 port->netdev = netdev;
1076 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
1077 port->type = xstrdup(type);
1078 for (i = 0; i < netdev_n_rxq(netdev); i++) {
1079 error = netdev_rxq_open(netdev, &port->rxq[i], i);
1081 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
1082 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
1083 devname, ovs_strerror(errno));
1084 netdev_close(netdev);
1092 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
1094 for (i = 0; i < netdev_n_rxq(netdev); i++) {
1095 netdev_rxq_close(port->rxq[i]);
1097 netdev_close(netdev);
1105 ovs_refcount_init(&port->ref_cnt);
1106 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
1108 if (netdev_is_pmd(netdev)) {
1109 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
1110 dp_netdev_reload_pmds(dp);
1112 seq_change(dp->port_seq);
1118 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
1119 odp_port_t *port_nop)
1121 struct dp_netdev *dp = get_dp_netdev(dpif);
1122 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1123 const char *dpif_port;
1127 ovs_mutex_lock(&dp->port_mutex);
1128 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
1129 if (*port_nop != ODPP_NONE) {
1130 port_no = *port_nop;
1131 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
1133 port_no = choose_port(dp, dpif_port);
1134 error = port_no == ODPP_NONE ? EFBIG : 0;
1137 *port_nop = port_no;
1138 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
1140 ovs_mutex_unlock(&dp->port_mutex);
1146 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
1148 struct dp_netdev *dp = get_dp_netdev(dpif);
1151 ovs_mutex_lock(&dp->port_mutex);
1152 if (port_no == ODPP_LOCAL) {
1155 struct dp_netdev_port *port;
1157 error = get_port_by_number(dp, port_no, &port);
1159 do_del_port(dp, port);
1162 ovs_mutex_unlock(&dp->port_mutex);
1168 is_valid_port_number(odp_port_t port_no)
1170 return port_no != ODPP_NONE;
1173 static struct dp_netdev_port *
1174 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
1176 struct dp_netdev_port *port;
1178 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
1179 if (port->port_no == port_no) {
1187 get_port_by_number(struct dp_netdev *dp,
1188 odp_port_t port_no, struct dp_netdev_port **portp)
1190 if (!is_valid_port_number(port_no)) {
1194 *portp = dp_netdev_lookup_port(dp, port_no);
1195 return *portp ? 0 : ENOENT;
1200 port_ref(struct dp_netdev_port *port)
1203 ovs_refcount_ref(&port->ref_cnt);
1208 port_try_ref(struct dp_netdev_port *port)
1211 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
1218 port_unref(struct dp_netdev_port *port)
1220 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
1221 int n_rxq = netdev_n_rxq(port->netdev);
1224 netdev_close(port->netdev);
1225 netdev_restore_flags(port->sf);
1227 for (i = 0; i < n_rxq; i++) {
1228 netdev_rxq_close(port->rxq[i]);
1237 get_port_by_name(struct dp_netdev *dp,
1238 const char *devname, struct dp_netdev_port **portp)
1239 OVS_REQUIRES(dp->port_mutex)
1241 struct dp_netdev_port *port;
1243 CMAP_FOR_EACH (port, node, &dp->ports) {
1244 if (!strcmp(netdev_get_name(port->netdev), devname)) {
1253 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
1255 struct dp_netdev_pmd_thread *pmd;
1258 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1259 if (pmd->numa_id == numa_id) {
1267 /* Returns 'true' if there is a port with pmd netdev and the netdev
1268 * is on numa node 'numa_id'. */
1270 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1272 struct dp_netdev_port *port;
1274 CMAP_FOR_EACH (port, node, &dp->ports) {
1275 if (netdev_is_pmd(port->netdev)
1276 && netdev_get_numa_id(port->netdev) == numa_id) {
1286 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1287 OVS_REQUIRES(dp->port_mutex)
1289 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1290 seq_change(dp->port_seq);
1291 if (netdev_is_pmd(port->netdev)) {
1292 int numa_id = netdev_get_numa_id(port->netdev);
1294 /* If there is no netdev on the numa node, deletes the pmd threads
1295 * for that numa. Else, just reloads the queues. */
1296 if (!has_pmd_port_for_numa(dp, numa_id)) {
1297 dp_netdev_del_pmds_on_numa(dp, numa_id);
1299 dp_netdev_reload_pmds(dp);
1306 answer_port_query(const struct dp_netdev_port *port,
1307 struct dpif_port *dpif_port)
1309 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1310 dpif_port->type = xstrdup(port->type);
1311 dpif_port->port_no = port->port_no;
1315 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1316 struct dpif_port *dpif_port)
1318 struct dp_netdev *dp = get_dp_netdev(dpif);
1319 struct dp_netdev_port *port;
1322 error = get_port_by_number(dp, port_no, &port);
1323 if (!error && dpif_port) {
1324 answer_port_query(port, dpif_port);
1331 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1332 struct dpif_port *dpif_port)
1334 struct dp_netdev *dp = get_dp_netdev(dpif);
1335 struct dp_netdev_port *port;
1338 ovs_mutex_lock(&dp->port_mutex);
1339 error = get_port_by_name(dp, devname, &port);
1340 if (!error && dpif_port) {
1341 answer_port_query(port, dpif_port);
1343 ovs_mutex_unlock(&dp->port_mutex);
1349 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1351 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1355 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1357 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1358 ovsrcu_postpone(dp_netdev_flow_free, flow);
1363 dp_netdev_flow_hash(const ovs_u128 *ufid)
1365 return ufid->u32[0];
1369 dp_netdev_pmd_remove_flow(struct dp_netdev_pmd_thread *pmd,
1370 struct dp_netdev_flow *flow)
1371 OVS_REQUIRES(pmd->flow_mutex)
1373 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1375 dpcls_remove(&pmd->cls, &flow->cr);
1376 cmap_remove(&pmd->flow_table, node, dp_netdev_flow_hash(&flow->ufid));
1379 dp_netdev_flow_unref(flow);
1383 dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd)
1385 struct dp_netdev_flow *netdev_flow;
1387 ovs_mutex_lock(&pmd->flow_mutex);
1388 CMAP_FOR_EACH (netdev_flow, node, &pmd->flow_table) {
1389 dp_netdev_pmd_remove_flow(pmd, netdev_flow);
1391 ovs_mutex_unlock(&pmd->flow_mutex);
1395 dpif_netdev_flow_flush(struct dpif *dpif)
1397 struct dp_netdev *dp = get_dp_netdev(dpif);
1398 struct dp_netdev_pmd_thread *pmd;
1400 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1401 dp_netdev_pmd_flow_flush(pmd);
1407 struct dp_netdev_port_state {
1408 struct cmap_position position;
1413 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1415 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1420 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1421 struct dpif_port *dpif_port)
1423 struct dp_netdev_port_state *state = state_;
1424 struct dp_netdev *dp = get_dp_netdev(dpif);
1425 struct cmap_node *node;
1428 node = cmap_next_position(&dp->ports, &state->position);
1430 struct dp_netdev_port *port;
1432 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1435 state->name = xstrdup(netdev_get_name(port->netdev));
1436 dpif_port->name = state->name;
1437 dpif_port->type = port->type;
1438 dpif_port->port_no = port->port_no;
1449 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1451 struct dp_netdev_port_state *state = state_;
1458 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1460 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1461 uint64_t new_port_seq;
1464 new_port_seq = seq_read(dpif->dp->port_seq);
1465 if (dpif->last_port_seq != new_port_seq) {
1466 dpif->last_port_seq = new_port_seq;
1476 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1478 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1480 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1483 static struct dp_netdev_flow *
1484 dp_netdev_flow_cast(const struct dpcls_rule *cr)
1486 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1489 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1491 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1494 /* netdev_flow_key utilities.
1496 * netdev_flow_key is basically a miniflow. We use these functions
1497 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1498 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1500 * - Since we are dealing exclusively with miniflows created by
1501 * miniflow_extract(), if the map is different the miniflow is different.
1502 * Therefore we can be faster by comparing the map and the miniflow in a
1504 * _ netdev_flow_key's miniflow has always inline values.
1505 * - These functions can be inlined by the compiler.
1507 * The following assertions make sure that what we're doing with miniflow is
1510 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1511 == sizeof(uint64_t));
1513 /* Given the number of bits set in the miniflow map, returns the size of the
1514 * 'netdev_flow_key.mf' */
1515 static inline uint32_t
1516 netdev_flow_key_size(uint32_t flow_u32s)
1518 return offsetof(struct miniflow, inline_values) +
1519 MINIFLOW_VALUES_SIZE(flow_u32s);
1523 netdev_flow_key_equal(const struct netdev_flow_key *a,
1524 const struct netdev_flow_key *b)
1526 /* 'b->len' may be not set yet. */
1527 return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
1530 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1531 * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
1532 * generated by miniflow_extract. */
1534 netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
1535 const struct miniflow *mf)
1537 return !memcmp(&key->mf, mf, key->len);
1541 netdev_flow_key_clone(struct netdev_flow_key *dst,
1542 const struct netdev_flow_key *src)
1545 offsetof(struct netdev_flow_key, mf) + src->len);
1550 netdev_flow_key_from_flow(struct netdev_flow_key *dst,
1551 const struct flow *src)
1553 struct dp_packet packet;
1554 uint64_t buf_stub[512 / 8];
1556 miniflow_initialize(&dst->mf, dst->buf);
1558 dp_packet_use_stub(&packet, buf_stub, sizeof buf_stub);
1559 pkt_metadata_from_flow(&packet.md, src);
1560 flow_compose(&packet, src);
1561 miniflow_extract(&packet, &dst->mf);
1562 dp_packet_uninit(&packet);
1564 dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
1565 dst->hash = 0; /* Not computed yet. */
1568 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1570 netdev_flow_mask_init(struct netdev_flow_key *mask,
1571 const struct match *match)
1573 const uint64_t *mask_u64 = (const uint64_t *) &match->wc.masks;
1574 uint64_t *dst = mask->mf.inline_values;
1575 uint64_t map, mask_map = 0;
1579 /* Only check masks that make sense for the flow. */
1580 map = flow_wc_map(&match->flow);
1583 uint64_t rm1bit = rightmost_1bit(map);
1584 int i = raw_ctz(map);
1588 *dst++ = mask_u64[i];
1589 hash = hash_add64(hash, mask_u64[i]);
1594 mask->mf.values_inline = true;
1595 mask->mf.map = mask_map;
1597 hash = hash_add64(hash, mask_map);
1599 n = dst - mask->mf.inline_values;
1601 mask->hash = hash_finish(hash, n * 8);
1602 mask->len = netdev_flow_key_size(n);
1605 /* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
1607 netdev_flow_key_init_masked(struct netdev_flow_key *dst,
1608 const struct flow *flow,
1609 const struct netdev_flow_key *mask)
1611 uint64_t *dst_u64 = dst->mf.inline_values;
1612 const uint64_t *mask_u64 = mask->mf.inline_values;
1616 dst->len = mask->len;
1617 dst->mf.values_inline = true;
1618 dst->mf.map = mask->mf.map;
1620 FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
1621 *dst_u64 = value & *mask_u64++;
1622 hash = hash_add64(hash, *dst_u64++);
1624 dst->hash = hash_finish(hash, (dst_u64 - dst->mf.inline_values) * 8);
1627 /* Iterate through all netdev_flow_key u64 values specified by 'MAP' */
1628 #define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
1629 for (struct mf_for_each_in_map_aux aux__ \
1630 = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
1631 mf_get_next_in_map(&aux__, &(VALUE)); \
1634 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1636 static inline uint32_t
1637 netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
1638 const struct netdev_flow_key *mask)
1640 const uint64_t *p = mask->mf.inline_values;
1644 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u64, key, mask->mf.map) {
1645 hash = hash_add64(hash, key_u64 & *p++);
1648 return hash_finish(hash, (p - mask->mf.inline_values) * 8);
1652 emc_entry_alive(struct emc_entry *ce)
1654 return ce->flow && !ce->flow->dead;
1658 emc_clear_entry(struct emc_entry *ce)
1661 dp_netdev_flow_unref(ce->flow);
1667 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1668 const struct netdev_flow_key *key)
1670 if (ce->flow != flow) {
1672 dp_netdev_flow_unref(ce->flow);
1675 if (dp_netdev_flow_ref(flow)) {
1682 netdev_flow_key_clone(&ce->key, key);
1687 emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
1688 struct dp_netdev_flow *flow)
1690 struct emc_entry *to_be_replaced = NULL;
1691 struct emc_entry *current_entry;
1693 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1694 if (netdev_flow_key_equal(¤t_entry->key, key)) {
1695 /* We found the entry with the 'mf' miniflow */
1696 emc_change_entry(current_entry, flow, NULL);
1700 /* Replacement policy: put the flow in an empty (not alive) entry, or
1701 * in the first entry where it can be */
1703 || (emc_entry_alive(to_be_replaced)
1704 && !emc_entry_alive(current_entry))
1705 || current_entry->key.hash < to_be_replaced->key.hash) {
1706 to_be_replaced = current_entry;
1709 /* We didn't find the miniflow in the cache.
1710 * The 'to_be_replaced' entry is where the new flow will be stored */
1712 emc_change_entry(to_be_replaced, flow, key);
1715 static inline struct dp_netdev_flow *
1716 emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
1718 struct emc_entry *current_entry;
1720 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
1721 if (current_entry->key.hash == key->hash
1722 && emc_entry_alive(current_entry)
1723 && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
1725 /* We found the entry with the 'key->mf' miniflow */
1726 return current_entry->flow;
1733 static struct dp_netdev_flow *
1734 dp_netdev_pmd_lookup_flow(const struct dp_netdev_pmd_thread *pmd,
1735 const struct netdev_flow_key *key)
1737 struct dp_netdev_flow *netdev_flow;
1738 struct dpcls_rule *rule;
1740 dpcls_lookup(&pmd->cls, key, &rule, 1);
1741 netdev_flow = dp_netdev_flow_cast(rule);
1746 static struct dp_netdev_flow *
1747 dp_netdev_pmd_find_flow(const struct dp_netdev_pmd_thread *pmd,
1748 const ovs_u128 *ufidp, const struct nlattr *key,
1751 struct dp_netdev_flow *netdev_flow;
1755 /* If a UFID is not provided, determine one based on the key. */
1756 if (!ufidp && key && key_len
1757 && !dpif_netdev_flow_from_nlattrs(key, key_len, &flow)) {
1758 dpif_flow_hash(pmd->dp->dpif, &flow, sizeof flow, &ufid);
1763 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, dp_netdev_flow_hash(ufidp),
1765 if (ovs_u128_equal(&netdev_flow->ufid, ufidp)) {
1775 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow_,
1776 struct dpif_flow_stats *stats)
1778 struct dp_netdev_flow *netdev_flow;
1779 unsigned long long n;
1783 netdev_flow = CONST_CAST(struct dp_netdev_flow *, netdev_flow_);
1785 atomic_read_relaxed(&netdev_flow->stats.packet_count, &n);
1786 stats->n_packets = n;
1787 atomic_read_relaxed(&netdev_flow->stats.byte_count, &n);
1789 atomic_read_relaxed(&netdev_flow->stats.used, &used);
1791 atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
1792 stats->tcp_flags = flags;
1795 /* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
1796 * storing the netlink-formatted key/mask. 'key_buf' may be the same as
1797 * 'mask_buf'. Actions will be returned without copying, by relying on RCU to
1800 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1801 struct ofpbuf *key_buf, struct ofpbuf *mask_buf,
1802 struct dpif_flow *flow, bool terse)
1805 memset(flow, 0, sizeof *flow);
1807 struct flow_wildcards wc;
1808 struct dp_netdev_actions *actions;
1811 miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
1814 offset = key_buf->size;
1815 flow->key = ofpbuf_tail(key_buf);
1816 odp_flow_key_from_flow(key_buf, &netdev_flow->flow, &wc.masks,
1817 netdev_flow->flow.in_port.odp_port, true);
1818 flow->key_len = key_buf->size - offset;
1821 offset = mask_buf->size;
1822 flow->mask = ofpbuf_tail(mask_buf);
1823 odp_flow_key_from_mask(mask_buf, &wc.masks, &netdev_flow->flow,
1824 odp_to_u32(wc.masks.in_port.odp_port),
1826 flow->mask_len = mask_buf->size - offset;
1829 actions = dp_netdev_flow_get_actions(netdev_flow);
1830 flow->actions = actions->actions;
1831 flow->actions_len = actions->size;
1834 flow->ufid = netdev_flow->ufid;
1835 flow->ufid_present = true;
1836 flow->pmd_id = netdev_flow->pmd_id;
1837 get_dpif_flow_stats(netdev_flow, &flow->stats);
1841 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1842 const struct nlattr *mask_key,
1843 uint32_t mask_key_len, const struct flow *flow,
1847 enum odp_key_fitness fitness;
1849 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1851 /* This should not happen: it indicates that
1852 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1853 * disagree on the acceptable form of a mask. Log the problem
1854 * as an error, with enough details to enable debugging. */
1855 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1857 if (!VLOG_DROP_ERR(&rl)) {
1861 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1863 VLOG_ERR("internal error parsing flow mask %s (%s)",
1864 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1871 enum mf_field_id id;
1872 /* No mask key, unwildcard everything except fields whose
1873 * prerequisities are not met. */
1874 memset(mask, 0x0, sizeof *mask);
1876 for (id = 0; id < MFF_N_IDS; ++id) {
1877 /* Skip registers and metadata. */
1878 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1879 && id != MFF_METADATA) {
1880 const struct mf_field *mf = mf_from_id(id);
1881 if (mf_are_prereqs_ok(mf, flow)) {
1882 mf_mask_field(mf, mask);
1888 /* Force unwildcard the in_port.
1890 * We need to do this even in the case where we unwildcard "everything"
1891 * above because "everything" only includes the 16-bit OpenFlow port number
1892 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1893 * port number mask->in_port.odp_port. */
1894 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1900 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1905 if (odp_flow_key_to_flow(key, key_len, flow)) {
1906 /* This should not happen: it indicates that odp_flow_key_from_flow()
1907 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1908 * flow. Log the problem as an error, with enough details to enable
1910 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1912 if (!VLOG_DROP_ERR(&rl)) {
1916 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1917 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1924 in_port = flow->in_port.odp_port;
1925 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1933 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1935 struct dp_netdev *dp = get_dp_netdev(dpif);
1936 struct dp_netdev_flow *netdev_flow;
1937 struct dp_netdev_pmd_thread *pmd;
1938 int pmd_id = get->pmd_id == PMD_ID_NULL ? NON_PMD_CORE_ID : get->pmd_id;
1941 pmd = dp_netdev_get_pmd(dp, pmd_id);
1946 netdev_flow = dp_netdev_pmd_find_flow(pmd, get->ufid, get->key,
1949 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->buffer,
1954 dp_netdev_pmd_unref(pmd);
1960 static struct dp_netdev_flow *
1961 dp_netdev_flow_add(struct dp_netdev_pmd_thread *pmd,
1962 struct match *match, const ovs_u128 *ufid,
1963 const struct nlattr *actions, size_t actions_len)
1964 OVS_REQUIRES(pmd->flow_mutex)
1966 struct dp_netdev_flow *flow;
1967 struct netdev_flow_key mask;
1969 netdev_flow_mask_init(&mask, match);
1970 /* Make sure wc does not have metadata. */
1971 ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
1973 /* Do not allocate extra space. */
1974 flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
1975 memset(&flow->stats, 0, sizeof flow->stats);
1977 *CONST_CAST(int *, &flow->pmd_id) = pmd->core_id;
1978 *CONST_CAST(struct flow *, &flow->flow) = match->flow;
1979 *CONST_CAST(ovs_u128 *, &flow->ufid) = *ufid;
1980 ovs_refcount_init(&flow->ref_cnt);
1981 ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
1983 netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
1984 dpcls_insert(&pmd->cls, &flow->cr, &mask);
1986 cmap_insert(&pmd->flow_table, CONST_CAST(struct cmap_node *, &flow->node),
1987 dp_netdev_flow_hash(&flow->ufid));
1989 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1991 struct ds ds = DS_EMPTY_INITIALIZER;
1993 match.flow = flow->flow;
1994 miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
1996 ds_put_cstr(&ds, "flow_add: ");
1997 odp_format_ufid(ufid, &ds);
1998 ds_put_cstr(&ds, " ");
1999 match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
2000 ds_put_cstr(&ds, ", actions:");
2001 format_odp_actions(&ds, actions, actions_len);
2003 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
2012 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
2014 struct dp_netdev *dp = get_dp_netdev(dpif);
2015 struct dp_netdev_flow *netdev_flow;
2016 struct netdev_flow_key key;
2017 struct dp_netdev_pmd_thread *pmd;
2020 int pmd_id = put->pmd_id == PMD_ID_NULL ? NON_PMD_CORE_ID : put->pmd_id;
2023 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
2027 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
2028 put->mask, put->mask_len,
2029 &match.flow, &match.wc.masks);
2034 pmd = dp_netdev_get_pmd(dp, pmd_id);
2039 /* Must produce a netdev_flow_key for lookup.
2040 * This interface is no longer performance critical, since it is not used
2041 * for upcall processing any more. */
2042 netdev_flow_key_from_flow(&key, &match.flow);
2047 dpif_flow_hash(dpif, &match.flow, sizeof match.flow, &ufid);
2050 ovs_mutex_lock(&pmd->flow_mutex);
2051 netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &key);
2053 if (put->flags & DPIF_FP_CREATE) {
2054 if (cmap_count(&pmd->flow_table) < MAX_FLOWS) {
2056 memset(put->stats, 0, sizeof *put->stats);
2058 dp_netdev_flow_add(pmd, &match, &ufid, put->actions,
2068 if (put->flags & DPIF_FP_MODIFY
2069 && flow_equal(&match.flow, &netdev_flow->flow)) {
2070 struct dp_netdev_actions *new_actions;
2071 struct dp_netdev_actions *old_actions;
2073 new_actions = dp_netdev_actions_create(put->actions,
2076 old_actions = dp_netdev_flow_get_actions(netdev_flow);
2077 ovsrcu_set(&netdev_flow->actions, new_actions);
2080 get_dpif_flow_stats(netdev_flow, put->stats);
2082 if (put->flags & DPIF_FP_ZERO_STATS) {
2083 /* XXX: The userspace datapath uses thread local statistics
2084 * (for flows), which should be updated only by the owning
2085 * thread. Since we cannot write on stats memory here,
2086 * we choose not to support this flag. Please note:
2087 * - This feature is currently used only by dpctl commands with
2089 * - Should the need arise, this operation can be implemented
2090 * by keeping a base value (to be update here) for each
2091 * counter, and subtracting it before outputting the stats */
2095 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
2096 } else if (put->flags & DPIF_FP_CREATE) {
2099 /* Overlapping flow. */
2103 ovs_mutex_unlock(&pmd->flow_mutex);
2104 dp_netdev_pmd_unref(pmd);
2110 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
2112 struct dp_netdev *dp = get_dp_netdev(dpif);
2113 struct dp_netdev_flow *netdev_flow;
2114 struct dp_netdev_pmd_thread *pmd;
2115 int pmd_id = del->pmd_id == PMD_ID_NULL ? NON_PMD_CORE_ID : del->pmd_id;
2118 pmd = dp_netdev_get_pmd(dp, pmd_id);
2123 ovs_mutex_lock(&pmd->flow_mutex);
2124 netdev_flow = dp_netdev_pmd_find_flow(pmd, del->ufid, del->key,
2128 get_dpif_flow_stats(netdev_flow, del->stats);
2130 dp_netdev_pmd_remove_flow(pmd, netdev_flow);
2134 ovs_mutex_unlock(&pmd->flow_mutex);
2135 dp_netdev_pmd_unref(pmd);
2140 struct dpif_netdev_flow_dump {
2141 struct dpif_flow_dump up;
2142 struct cmap_position poll_thread_pos;
2143 struct cmap_position flow_pos;
2144 struct dp_netdev_pmd_thread *cur_pmd;
2146 struct ovs_mutex mutex;
2149 static struct dpif_netdev_flow_dump *
2150 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
2152 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
2155 static struct dpif_flow_dump *
2156 dpif_netdev_flow_dump_create(const struct dpif *dpif_, bool terse)
2158 struct dpif_netdev_flow_dump *dump;
2160 dump = xzalloc(sizeof *dump);
2161 dpif_flow_dump_init(&dump->up, dpif_);
2162 dump->up.terse = terse;
2163 ovs_mutex_init(&dump->mutex);
2169 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
2171 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
2173 ovs_mutex_destroy(&dump->mutex);
2178 struct dpif_netdev_flow_dump_thread {
2179 struct dpif_flow_dump_thread up;
2180 struct dpif_netdev_flow_dump *dump;
2181 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
2182 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
2185 static struct dpif_netdev_flow_dump_thread *
2186 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
2188 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
2191 static struct dpif_flow_dump_thread *
2192 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
2194 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
2195 struct dpif_netdev_flow_dump_thread *thread;
2197 thread = xmalloc(sizeof *thread);
2198 dpif_flow_dump_thread_init(&thread->up, &dump->up);
2199 thread->dump = dump;
2204 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
2206 struct dpif_netdev_flow_dump_thread *thread
2207 = dpif_netdev_flow_dump_thread_cast(thread_);
2213 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
2214 struct dpif_flow *flows, int max_flows)
2216 struct dpif_netdev_flow_dump_thread *thread
2217 = dpif_netdev_flow_dump_thread_cast(thread_);
2218 struct dpif_netdev_flow_dump *dump = thread->dump;
2219 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
2223 ovs_mutex_lock(&dump->mutex);
2224 if (!dump->status) {
2225 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
2226 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
2227 struct dp_netdev_pmd_thread *pmd = dump->cur_pmd;
2228 int flow_limit = MIN(max_flows, FLOW_DUMP_MAX_BATCH);
2230 /* First call to dump_next(), extracts the first pmd thread.
2231 * If there is no pmd thread, returns immediately. */
2233 pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
2235 ovs_mutex_unlock(&dump->mutex);
2242 for (n_flows = 0; n_flows < flow_limit; n_flows++) {
2243 struct cmap_node *node;
2245 node = cmap_next_position(&pmd->flow_table, &dump->flow_pos);
2249 netdev_flows[n_flows] = CONTAINER_OF(node,
2250 struct dp_netdev_flow,
2253 /* When finishing dumping the current pmd thread, moves to
2255 if (n_flows < flow_limit) {
2256 memset(&dump->flow_pos, 0, sizeof dump->flow_pos);
2257 dp_netdev_pmd_unref(pmd);
2258 pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
2264 /* Keeps the reference to next caller. */
2265 dump->cur_pmd = pmd;
2267 /* If the current dump is empty, do not exit the loop, since the
2268 * remaining pmds could have flows to be dumped. Just dumps again
2269 * on the new 'pmd'. */
2272 ovs_mutex_unlock(&dump->mutex);
2274 for (i = 0; i < n_flows; i++) {
2275 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
2276 struct odputil_keybuf *keybuf = &thread->keybuf[i];
2277 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
2278 struct dpif_flow *f = &flows[i];
2279 struct ofpbuf key, mask;
2281 ofpbuf_use_stack(&key, keybuf, sizeof *keybuf);
2282 ofpbuf_use_stack(&mask, maskbuf, sizeof *maskbuf);
2283 dp_netdev_flow_to_dpif_flow(netdev_flow, &key, &mask, f,
2291 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
2292 OVS_NO_THREAD_SAFETY_ANALYSIS
2294 struct dp_netdev *dp = get_dp_netdev(dpif);
2295 struct dp_netdev_pmd_thread *pmd;
2296 struct dp_packet *pp;
2298 if (dp_packet_size(execute->packet) < ETH_HEADER_LEN ||
2299 dp_packet_size(execute->packet) > UINT16_MAX) {
2303 /* Tries finding the 'pmd'. If NULL is returned, that means
2304 * the current thread is a non-pmd thread and should use
2305 * dp_netdev_get_pmd(dp, NON_PMD_CORE_ID). */
2306 pmd = ovsthread_getspecific(dp->per_pmd_key);
2308 pmd = dp_netdev_get_pmd(dp, NON_PMD_CORE_ID);
2311 /* If the current thread is non-pmd thread, acquires
2312 * the 'non_pmd_mutex'. */
2313 if (pmd->core_id == NON_PMD_CORE_ID) {
2314 ovs_mutex_lock(&dp->non_pmd_mutex);
2315 ovs_mutex_lock(&dp->port_mutex);
2318 pp = execute->packet;
2319 dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
2320 execute->actions_len);
2321 if (pmd->core_id == NON_PMD_CORE_ID) {
2322 dp_netdev_pmd_unref(pmd);
2323 ovs_mutex_unlock(&dp->port_mutex);
2324 ovs_mutex_unlock(&dp->non_pmd_mutex);
2331 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
2335 for (i = 0; i < n_ops; i++) {
2336 struct dpif_op *op = ops[i];
2339 case DPIF_OP_FLOW_PUT:
2340 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
2343 case DPIF_OP_FLOW_DEL:
2344 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
2347 case DPIF_OP_EXECUTE:
2348 op->error = dpif_netdev_execute(dpif, &op->u.execute);
2351 case DPIF_OP_FLOW_GET:
2352 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
2358 /* Returns true if the configuration for rx queues or cpu mask
2361 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
2363 if (dp->n_dpdk_rxqs != rxqs) {
2366 if (dp->pmd_cmask != NULL && cmask != NULL) {
2367 return strcmp(dp->pmd_cmask, cmask);
2369 return (dp->pmd_cmask != NULL || cmask != NULL);
2374 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2376 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
2378 struct dp_netdev *dp = get_dp_netdev(dpif);
2380 if (pmd_config_changed(dp, n_rxqs, cmask)) {
2381 struct dp_netdev_port *port;
2383 dp_netdev_destroy_all_pmds(dp);
2385 CMAP_FOR_EACH (port, node, &dp->ports) {
2386 if (netdev_is_pmd(port->netdev)) {
2389 /* Closes the existing 'rxq's. */
2390 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2391 netdev_rxq_close(port->rxq[i]);
2392 port->rxq[i] = NULL;
2395 /* Sets the new rx queue config. */
2396 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
2398 if (err && (err != EOPNOTSUPP)) {
2399 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2400 " %u", netdev_get_name(port->netdev),
2405 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2406 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
2407 * netdev_n_rxq(port->netdev));
2408 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2409 netdev_rxq_open(port->netdev, &port->rxq[i], i);
2413 dp->n_dpdk_rxqs = n_rxqs;
2415 /* Reconfigures the cpu mask. */
2416 ovs_numa_set_cpu_mask(cmask);
2417 free(dp->pmd_cmask);
2418 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
2420 /* Restores the non-pmd. */
2421 dp_netdev_set_nonpmd(dp);
2422 /* Restores all pmd threads. */
2423 dp_netdev_reset_pmd_threads(dp);
2430 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2431 uint32_t queue_id, uint32_t *priority)
2433 *priority = queue_id;
2438 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2439 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2441 struct dp_netdev_actions *
2442 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2444 struct dp_netdev_actions *netdev_actions;
2446 netdev_actions = xmalloc(sizeof *netdev_actions);
2447 netdev_actions->actions = xmemdup(actions, size);
2448 netdev_actions->size = size;
2450 return netdev_actions;
2453 struct dp_netdev_actions *
2454 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2456 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2460 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2462 free(actions->actions);
2466 static inline unsigned long long
2467 cycles_counter(void)
2470 return rte_get_tsc_cycles();
2476 /* Fake mutex to make sure that the calls to cycles_count_* are balanced */
2477 extern struct ovs_mutex cycles_counter_fake_mutex;
2479 /* Start counting cycles. Must be followed by 'cycles_count_end()' */
2481 cycles_count_start(struct dp_netdev_pmd_thread *pmd)
2482 OVS_ACQUIRES(&cycles_counter_fake_mutex)
2483 OVS_NO_THREAD_SAFETY_ANALYSIS
2485 pmd->last_cycles = cycles_counter();
2488 /* Stop counting cycles and add them to the counter 'type' */
2490 cycles_count_end(struct dp_netdev_pmd_thread *pmd,
2491 enum pmd_cycles_counter_type type)
2492 OVS_RELEASES(&cycles_counter_fake_mutex)
2493 OVS_NO_THREAD_SAFETY_ANALYSIS
2495 unsigned long long interval = cycles_counter() - pmd->last_cycles;
2497 non_atomic_ullong_add(&pmd->cycles.n[type], interval);
2501 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2502 struct dp_netdev_port *port,
2503 struct netdev_rxq *rxq)
2505 struct dp_packet *packets[NETDEV_MAX_RX_BATCH];
2508 cycles_count_start(pmd);
2509 error = netdev_rxq_recv(rxq, packets, &cnt);
2510 cycles_count_end(pmd, PMD_CYCLES_POLLING);
2514 *recirc_depth_get() = 0;
2516 /* XXX: initialize md in netdev implementation. */
2517 for (i = 0; i < cnt; i++) {
2518 packets[i]->md = PKT_METADATA_INITIALIZER(port->port_no);
2520 cycles_count_start(pmd);
2521 dp_netdev_input(pmd, packets, cnt);
2522 cycles_count_end(pmd, PMD_CYCLES_PROCESSING);
2523 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2524 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2526 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2527 netdev_get_name(port->netdev), ovs_strerror(error));
2531 /* Return true if needs to revalidate datapath flows. */
2533 dpif_netdev_run(struct dpif *dpif)
2535 struct dp_netdev_port *port;
2536 struct dp_netdev *dp = get_dp_netdev(dpif);
2537 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_pmd(dp,
2539 uint64_t new_tnl_seq;
2541 ovs_mutex_lock(&dp->non_pmd_mutex);
2542 CMAP_FOR_EACH (port, node, &dp->ports) {
2543 if (!netdev_is_pmd(port->netdev)) {
2546 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2547 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2551 ovs_mutex_unlock(&dp->non_pmd_mutex);
2552 dp_netdev_pmd_unref(non_pmd);
2554 tnl_arp_cache_run();
2555 new_tnl_seq = seq_read(tnl_conf_seq);
2557 if (dp->last_tnl_conf_seq != new_tnl_seq) {
2558 dp->last_tnl_conf_seq = new_tnl_seq;
2565 dpif_netdev_wait(struct dpif *dpif)
2567 struct dp_netdev_port *port;
2568 struct dp_netdev *dp = get_dp_netdev(dpif);
2570 ovs_mutex_lock(&dp_netdev_mutex);
2571 CMAP_FOR_EACH (port, node, &dp->ports) {
2572 if (!netdev_is_pmd(port->netdev)) {
2575 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2576 netdev_rxq_wait(port->rxq[i]);
2580 ovs_mutex_unlock(&dp_netdev_mutex);
2581 seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
2585 struct dp_netdev_port *port;
2586 struct netdev_rxq *rx;
2590 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2591 struct rxq_poll **ppoll_list, int poll_cnt)
2593 struct rxq_poll *poll_list = *ppoll_list;
2594 struct dp_netdev_port *port;
2595 int n_pmds_on_numa, index, i;
2597 /* Simple scheduler for netdev rx polling. */
2598 for (i = 0; i < poll_cnt; i++) {
2599 port_unref(poll_list[i].port);
2603 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2606 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2607 /* Calls port_try_ref() to prevent the main thread
2608 * from deleting the port. */
2609 if (port_try_ref(port)) {
2610 if (netdev_is_pmd(port->netdev)
2611 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2614 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2615 if ((index % n_pmds_on_numa) == pmd->index) {
2616 poll_list = xrealloc(poll_list,
2617 sizeof *poll_list * (poll_cnt + 1));
2620 poll_list[poll_cnt].port = port;
2621 poll_list[poll_cnt].rx = port->rxq[i];
2627 /* Unrefs the port_try_ref(). */
2632 *ppoll_list = poll_list;
2637 pmd_thread_main(void *f_)
2639 struct dp_netdev_pmd_thread *pmd = f_;
2640 unsigned int lc = 0;
2641 struct rxq_poll *poll_list;
2642 unsigned int port_seq = PMD_INITIAL_SEQ;
2649 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2650 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2651 pmd_thread_setaffinity_cpu(pmd->core_id);
2653 emc_cache_init(&pmd->flow_cache);
2654 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2656 /* Signal here to make sure the pmd finishes
2657 * reloading the updated configuration. */
2658 dp_netdev_pmd_reload_done(pmd);
2663 for (i = 0; i < poll_cnt; i++) {
2664 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2672 emc_cache_slow_sweep(&pmd->flow_cache);
2675 atomic_read_relaxed(&pmd->change_seq, &seq);
2676 if (seq != port_seq) {
2683 emc_cache_uninit(&pmd->flow_cache);
2685 if (!latch_is_set(&pmd->exit_latch)){
2689 for (i = 0; i < poll_cnt; i++) {
2690 port_unref(poll_list[i].port);
2693 dp_netdev_pmd_reload_done(pmd);
2700 dp_netdev_disable_upcall(struct dp_netdev *dp)
2701 OVS_ACQUIRES(dp->upcall_rwlock)
2703 fat_rwlock_wrlock(&dp->upcall_rwlock);
2707 dpif_netdev_disable_upcall(struct dpif *dpif)
2708 OVS_NO_THREAD_SAFETY_ANALYSIS
2710 struct dp_netdev *dp = get_dp_netdev(dpif);
2711 dp_netdev_disable_upcall(dp);
2715 dp_netdev_enable_upcall(struct dp_netdev *dp)
2716 OVS_RELEASES(dp->upcall_rwlock)
2718 fat_rwlock_unlock(&dp->upcall_rwlock);
2722 dpif_netdev_enable_upcall(struct dpif *dpif)
2723 OVS_NO_THREAD_SAFETY_ANALYSIS
2725 struct dp_netdev *dp = get_dp_netdev(dpif);
2726 dp_netdev_enable_upcall(dp);
2730 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
2732 ovs_mutex_lock(&pmd->cond_mutex);
2733 xpthread_cond_signal(&pmd->cond);
2734 ovs_mutex_unlock(&pmd->cond_mutex);
2737 /* Finds and refs the dp_netdev_pmd_thread on core 'core_id'. Returns
2738 * the pointer if succeeds, otherwise, NULL.
2740 * Caller must unrefs the returned reference. */
2741 static struct dp_netdev_pmd_thread *
2742 dp_netdev_get_pmd(struct dp_netdev *dp, int core_id)
2744 struct dp_netdev_pmd_thread *pmd;
2745 const struct cmap_node *pnode;
2747 pnode = cmap_find(&dp->poll_threads, hash_int(core_id, 0));
2751 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2753 return dp_netdev_pmd_try_ref(pmd) ? pmd : NULL;
2756 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2758 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2760 struct dp_netdev_pmd_thread *non_pmd;
2762 non_pmd = xzalloc(sizeof *non_pmd);
2763 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2767 /* Caller must have valid pointer to 'pmd'. */
2769 dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd)
2771 return ovs_refcount_try_ref_rcu(&pmd->ref_cnt);
2775 dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd)
2777 if (pmd && ovs_refcount_unref(&pmd->ref_cnt) == 1) {
2778 ovsrcu_postpone(dp_netdev_destroy_pmd, pmd);
2782 /* Given cmap position 'pos', tries to ref the next node. If try_ref()
2783 * fails, keeps checking for next node until reaching the end of cmap.
2785 * Caller must unrefs the returned reference. */
2786 static struct dp_netdev_pmd_thread *
2787 dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos)
2789 struct dp_netdev_pmd_thread *next;
2792 struct cmap_node *node;
2794 node = cmap_next_position(&dp->poll_threads, pos);
2795 next = node ? CONTAINER_OF(node, struct dp_netdev_pmd_thread, node)
2797 } while (next && !dp_netdev_pmd_try_ref(next));
2802 /* Configures the 'pmd' based on the input argument. */
2804 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2805 int index, int core_id, int numa_id)
2809 pmd->core_id = core_id;
2810 pmd->numa_id = numa_id;
2812 ovs_refcount_init(&pmd->ref_cnt);
2813 latch_init(&pmd->exit_latch);
2814 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2815 xpthread_cond_init(&pmd->cond, NULL);
2816 ovs_mutex_init(&pmd->cond_mutex);
2817 ovs_mutex_init(&pmd->flow_mutex);
2818 dpcls_init(&pmd->cls);
2819 cmap_init(&pmd->flow_table);
2820 /* init the 'flow_cache' since there is no
2821 * actual thread created for NON_PMD_CORE_ID. */
2822 if (core_id == NON_PMD_CORE_ID) {
2823 emc_cache_init(&pmd->flow_cache);
2825 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2826 hash_int(core_id, 0));
2830 dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd)
2832 dp_netdev_pmd_flow_flush(pmd);
2833 dpcls_destroy(&pmd->cls);
2834 cmap_destroy(&pmd->flow_table);
2835 ovs_mutex_destroy(&pmd->flow_mutex);
2836 latch_destroy(&pmd->exit_latch);
2837 xpthread_cond_destroy(&pmd->cond);
2838 ovs_mutex_destroy(&pmd->cond_mutex);
2842 /* Stops the pmd thread, removes it from the 'dp->poll_threads',
2843 * and unrefs the struct. */
2845 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2847 /* Uninit the 'flow_cache' since there is
2848 * no actual thread uninit it for NON_PMD_CORE_ID. */
2849 if (pmd->core_id == NON_PMD_CORE_ID) {
2850 emc_cache_uninit(&pmd->flow_cache);
2852 latch_set(&pmd->exit_latch);
2853 dp_netdev_reload_pmd__(pmd);
2854 ovs_numa_unpin_core(pmd->core_id);
2855 xpthread_join(pmd->thread, NULL);
2857 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2858 dp_netdev_pmd_unref(pmd);
2861 /* Destroys all pmd threads. */
2863 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2865 struct dp_netdev_pmd_thread *pmd;
2867 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2868 dp_netdev_del_pmd(pmd);
2872 /* Deletes all pmd threads on numa node 'numa_id'. */
2874 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2876 struct dp_netdev_pmd_thread *pmd;
2878 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2879 if (pmd->numa_id == numa_id) {
2880 dp_netdev_del_pmd(pmd);
2885 /* Checks the numa node id of 'netdev' and starts pmd threads for
2888 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2892 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2893 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2894 "invalid", numa_id);
2898 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2900 /* If there are already pmd threads created for the numa node
2901 * in which 'netdev' is on, do nothing. Else, creates the
2902 * pmd threads for the numa node. */
2904 int can_have, n_unpinned, i;
2906 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2908 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2909 "cores on numa node");
2913 /* If cpu mask is specified, uses all unpinned cores, otherwise
2914 * tries creating NR_PMD_THREADS pmd threads. */
2915 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2916 for (i = 0; i < can_have; i++) {
2917 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2918 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2920 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2921 /* Each thread will distribute all devices rx-queues among
2923 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2925 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2930 /* Called after pmd threads config change. Restarts pmd threads with
2931 * new configuration. */
2933 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2935 struct dp_netdev_port *port;
2937 CMAP_FOR_EACH (port, node, &dp->ports) {
2938 if (netdev_is_pmd(port->netdev)) {
2939 int numa_id = netdev_get_numa_id(port->netdev);
2941 dp_netdev_set_pmds_on_numa(dp, numa_id);
2947 dpif_netdev_get_datapath_version(void)
2949 return xstrdup("<built-in>");
2953 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow, int cnt, int size,
2956 long long now = time_msec();
2959 atomic_store_relaxed(&netdev_flow->stats.used, now);
2960 non_atomic_ullong_add(&netdev_flow->stats.packet_count, cnt);
2961 non_atomic_ullong_add(&netdev_flow->stats.byte_count, size);
2962 atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
2964 atomic_store_relaxed(&netdev_flow->stats.tcp_flags, flags);
2968 dp_netdev_count_packet(struct dp_netdev_pmd_thread *pmd,
2969 enum dp_stat_type type, int cnt)
2971 non_atomic_ullong_add(&pmd->stats.n[type], cnt);
2975 dp_netdev_upcall(struct dp_netdev_pmd_thread *pmd, struct dp_packet *packet_,
2976 struct flow *flow, struct flow_wildcards *wc, ovs_u128 *ufid,
2977 enum dpif_upcall_type type, const struct nlattr *userdata,
2978 struct ofpbuf *actions, struct ofpbuf *put_actions)
2980 struct dp_netdev *dp = pmd->dp;
2982 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2986 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2987 struct ds ds = DS_EMPTY_INITIALIZER;
2991 ofpbuf_init(&key, 0);
2992 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2994 packet_str = ofp_packet_to_string(dp_packet_data(packet_),
2995 dp_packet_size(packet_));
2997 odp_flow_key_format(key.data, key.size, &ds);
2999 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
3000 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
3002 ofpbuf_uninit(&key);
3008 return dp->upcall_cb(packet_, flow, ufid, pmd->core_id, type, userdata,
3009 actions, wc, put_actions, dp->upcall_aux);
3012 static inline uint32_t
3013 dpif_netdev_packet_get_dp_hash(struct dp_packet *packet,
3014 const struct miniflow *mf)
3018 hash = dp_packet_get_dp_hash(packet);
3019 if (OVS_UNLIKELY(!hash)) {
3020 hash = miniflow_hash_5tuple(mf, 0);
3021 dp_packet_set_dp_hash(packet, hash);
3026 struct packet_batch {
3027 unsigned int packet_count;
3028 unsigned int byte_count;
3031 struct dp_netdev_flow *flow;
3033 struct dp_packet *packets[NETDEV_MAX_RX_BATCH];
3037 packet_batch_update(struct packet_batch *batch, struct dp_packet *packet,
3038 const struct miniflow *mf)
3040 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
3041 batch->packets[batch->packet_count++] = packet;
3042 batch->byte_count += dp_packet_size(packet);
3046 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
3050 batch->packet_count = 0;
3051 batch->byte_count = 0;
3052 batch->tcp_flags = 0;
3056 packet_batch_execute(struct packet_batch *batch,
3057 struct dp_netdev_pmd_thread *pmd,
3058 enum dp_stat_type hit_type)
3060 struct dp_netdev_actions *actions;
3061 struct dp_netdev_flow *flow = batch->flow;
3063 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
3066 actions = dp_netdev_flow_get_actions(flow);
3068 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
3069 actions->actions, actions->size);
3071 dp_netdev_count_packet(pmd, hit_type, batch->packet_count);
3075 dp_netdev_queue_batches(struct dp_packet *pkt,
3076 struct dp_netdev_flow *flow, const struct miniflow *mf,
3077 struct packet_batch *batches, size_t *n_batches,
3080 struct packet_batch *batch = NULL;
3083 if (OVS_UNLIKELY(!flow)) {
3086 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
3087 * assumption that the number of distinct flows (and therefore the
3088 * number of distinct batches) is quite small. If this turns out not
3089 * to be the case, it may make sense to pre sort based on the
3090 * netdev_flow pointer. That done we can get the appropriate batching
3091 * in O(n * log(n)) instead. */
3092 for (j = *n_batches - 1; j >= 0; j--) {
3093 if (batches[j].flow == flow) {
3094 batch = &batches[j];
3095 packet_batch_update(batch, pkt, mf);
3099 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
3103 batch = &batches[(*n_batches)++];
3104 packet_batch_init(batch, flow);
3105 packet_batch_update(batch, pkt, mf);
3110 dp_packet_swap(struct dp_packet **a, struct dp_packet **b)
3112 struct dp_packet *tmp = *a;
3117 /* Try to process all ('cnt') the 'packets' using only the exact match cache
3118 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
3119 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
3120 * and the packet pointer is moved at the beginning of the 'packets' array.
3122 * The function returns the number of packets that needs to be processed in the
3123 * 'packets' array (they have been moved to the beginning of the vector).
3125 static inline size_t
3126 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dp_packet **packets,
3127 size_t cnt, struct netdev_flow_key *keys)
3129 struct netdev_flow_key key;
3130 struct packet_batch batches[4];
3131 struct emc_cache *flow_cache = &pmd->flow_cache;
3132 size_t n_batches, i;
3133 size_t notfound_cnt = 0;
3136 miniflow_initialize(&key.mf, key.buf);
3137 for (i = 0; i < cnt; i++) {
3138 struct dp_netdev_flow *flow;
3140 if (OVS_UNLIKELY(dp_packet_size(packets[i]) < ETH_HEADER_LEN)) {
3141 dp_packet_delete(packets[i]);
3145 miniflow_extract(packets[i], &key.mf);
3146 key.len = 0; /* Not computed yet. */
3147 key.hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.mf);
3149 flow = emc_lookup(flow_cache, &key);
3150 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], flow, &key.mf,
3151 batches, &n_batches,
3152 ARRAY_SIZE(batches)))) {
3153 if (i != notfound_cnt) {
3154 dp_packet_swap(&packets[i], &packets[notfound_cnt]);
3157 keys[notfound_cnt++] = key;
3161 for (i = 0; i < n_batches; i++) {
3162 packet_batch_execute(&batches[i], pmd, DP_STAT_EXACT_HIT);
3165 return notfound_cnt;
3169 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
3170 struct dp_packet **packets, size_t cnt,
3171 struct netdev_flow_key *keys)
3173 #if !defined(__CHECKER__) && !defined(_WIN32)
3174 const size_t PKT_ARRAY_SIZE = cnt;
3176 /* Sparse or MSVC doesn't like variable length array. */
3177 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
3179 struct packet_batch batches[PKT_ARRAY_SIZE];
3180 struct dpcls_rule *rules[PKT_ARRAY_SIZE];
3181 struct dp_netdev *dp = pmd->dp;
3182 struct emc_cache *flow_cache = &pmd->flow_cache;
3183 size_t n_batches, i;
3186 for (i = 0; i < cnt; i++) {
3187 /* Key length is needed in all the cases, hash computed on demand. */
3188 keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
3190 any_miss = !dpcls_lookup(&pmd->cls, keys, rules, cnt);
3191 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3192 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
3193 struct ofpbuf actions, put_actions;
3194 int miss_cnt = 0, lost_cnt = 0;
3197 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
3198 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
3200 for (i = 0; i < cnt; i++) {
3201 struct dp_netdev_flow *netdev_flow;
3202 struct ofpbuf *add_actions;
3206 if (OVS_LIKELY(rules[i])) {
3210 /* It's possible that an earlier slow path execution installed
3211 * a rule covering this flow. In this case, it's a lot cheaper
3212 * to catch it here than execute a miss. */
3213 netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &keys[i]);
3215 rules[i] = &netdev_flow->cr;
3221 miniflow_expand(&keys[i].mf, &match.flow);
3223 ofpbuf_clear(&actions);
3224 ofpbuf_clear(&put_actions);
3226 dpif_flow_hash(dp->dpif, &match.flow, sizeof match.flow, &ufid);
3227 error = dp_netdev_upcall(pmd, packets[i], &match.flow, &match.wc,
3228 &ufid, DPIF_UC_MISS, NULL, &actions,
3230 if (OVS_UNLIKELY(error && error != ENOSPC)) {
3231 dp_packet_delete(packets[i]);
3236 /* We can't allow the packet batching in the next loop to execute
3237 * the actions. Otherwise, if there are any slow path actions,
3238 * we'll send the packet up twice. */
3239 dp_netdev_execute_actions(pmd, &packets[i], 1, true,
3240 actions.data, actions.size);
3242 add_actions = put_actions.size ? &put_actions : &actions;
3243 if (OVS_LIKELY(error != ENOSPC)) {
3244 /* XXX: There's a race window where a flow covering this packet
3245 * could have already been installed since we last did the flow
3246 * lookup before upcall. This could be solved by moving the
3247 * mutex lock outside the loop, but that's an awful long time
3248 * to be locking everyone out of making flow installs. If we
3249 * move to a per-core classifier, it would be reasonable. */
3250 ovs_mutex_lock(&pmd->flow_mutex);
3251 netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &keys[i]);
3252 if (OVS_LIKELY(!netdev_flow)) {
3253 netdev_flow = dp_netdev_flow_add(pmd, &match, &ufid,
3257 ovs_mutex_unlock(&pmd->flow_mutex);
3259 emc_insert(flow_cache, &keys[i], netdev_flow);
3263 ofpbuf_uninit(&actions);
3264 ofpbuf_uninit(&put_actions);
3265 fat_rwlock_unlock(&dp->upcall_rwlock);
3266 dp_netdev_count_packet(pmd, DP_STAT_MISS, miss_cnt);
3267 dp_netdev_count_packet(pmd, DP_STAT_LOST, lost_cnt);
3268 } else if (OVS_UNLIKELY(any_miss)) {
3269 int dropped_cnt = 0;
3271 for (i = 0; i < cnt; i++) {
3272 if (OVS_UNLIKELY(!rules[i])) {
3273 dp_packet_delete(packets[i]);
3278 dp_netdev_count_packet(pmd, DP_STAT_MISS, dropped_cnt);
3279 dp_netdev_count_packet(pmd, DP_STAT_LOST, dropped_cnt);
3283 for (i = 0; i < cnt; i++) {
3284 struct dp_packet *packet = packets[i];
3285 struct dp_netdev_flow *flow;
3287 if (OVS_UNLIKELY(!rules[i])) {
3291 flow = dp_netdev_flow_cast(rules[i]);
3293 emc_insert(flow_cache, &keys[i], flow);
3294 dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches,
3295 &n_batches, ARRAY_SIZE(batches));
3298 for (i = 0; i < n_batches; i++) {
3299 packet_batch_execute(&batches[i], pmd, DP_STAT_MASKED_HIT);
3304 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
3305 struct dp_packet **packets, int cnt)
3307 #if !defined(__CHECKER__) && !defined(_WIN32)
3308 const size_t PKT_ARRAY_SIZE = cnt;
3310 /* Sparse or MSVC doesn't like variable length array. */
3311 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
3313 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
3316 newcnt = emc_processing(pmd, packets, cnt, keys);
3317 if (OVS_UNLIKELY(newcnt)) {
3318 fast_path_processing(pmd, packets, newcnt, keys);
3322 struct dp_netdev_execute_aux {
3323 struct dp_netdev_pmd_thread *pmd;
3327 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
3330 struct dp_netdev *dp = get_dp_netdev(dpif);
3331 dp->upcall_aux = aux;
3336 dp_netdev_drop_packets(struct dp_packet ** packets, int cnt, bool may_steal)
3341 for (i = 0; i < cnt; i++) {
3342 dp_packet_delete(packets[i]);
3348 push_tnl_action(const struct dp_netdev *dp,
3349 const struct nlattr *attr,
3350 struct dp_packet **packets, int cnt)
3352 struct dp_netdev_port *tun_port;
3353 const struct ovs_action_push_tnl *data;
3355 data = nl_attr_get(attr);
3357 tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
3361 netdev_push_header(tun_port->netdev, packets, cnt, data);
3367 dp_netdev_clone_pkt_batch(struct dp_packet **tnl_pkt,
3368 struct dp_packet **packets, int cnt)
3372 for (i = 0; i < cnt; i++) {
3373 tnl_pkt[i] = dp_packet_clone(packets[i]);
3378 dp_execute_cb(void *aux_, struct dp_packet **packets, int cnt,
3379 const struct nlattr *a, bool may_steal)
3380 OVS_NO_THREAD_SAFETY_ANALYSIS
3382 struct dp_netdev_execute_aux *aux = aux_;
3383 uint32_t *depth = recirc_depth_get();
3384 struct dp_netdev_pmd_thread *pmd= aux->pmd;
3385 struct dp_netdev *dp= pmd->dp;
3386 int type = nl_attr_type(a);
3387 struct dp_netdev_port *p;
3390 switch ((enum ovs_action_attr)type) {
3391 case OVS_ACTION_ATTR_OUTPUT:
3392 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
3393 if (OVS_LIKELY(p)) {
3394 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
3399 case OVS_ACTION_ATTR_TUNNEL_PUSH:
3400 if (*depth < MAX_RECIRC_DEPTH) {
3401 struct dp_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3405 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3409 err = push_tnl_action(dp, a, packets, cnt);
3412 dp_netdev_input(pmd, packets, cnt);
3415 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3421 case OVS_ACTION_ATTR_TUNNEL_POP:
3422 if (*depth < MAX_RECIRC_DEPTH) {
3423 odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
3425 p = dp_netdev_lookup_port(dp, portno);
3427 struct dp_packet *tnl_pkt[NETDEV_MAX_RX_BATCH];
3431 dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
3435 err = netdev_pop_header(p->netdev, packets, cnt);
3438 for (i = 0; i < cnt; i++) {
3439 packets[i]->md.in_port.odp_port = portno;
3443 dp_netdev_input(pmd, packets, cnt);
3446 dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
3453 case OVS_ACTION_ATTR_USERSPACE:
3454 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
3455 const struct nlattr *userdata;
3456 struct ofpbuf actions;
3460 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
3461 ofpbuf_init(&actions, 0);
3463 for (i = 0; i < cnt; i++) {
3466 ofpbuf_clear(&actions);
3468 flow_extract(packets[i], &flow);
3469 dpif_flow_hash(dp->dpif, &flow, sizeof flow, &ufid);
3470 error = dp_netdev_upcall(pmd, packets[i], &flow, NULL, &ufid,
3471 DPIF_UC_ACTION, userdata,&actions,
3473 if (!error || error == ENOSPC) {
3474 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
3475 actions.data, actions.size);
3476 } else if (may_steal) {
3477 dp_packet_delete(packets[i]);
3480 ofpbuf_uninit(&actions);
3481 fat_rwlock_unlock(&dp->upcall_rwlock);
3487 case OVS_ACTION_ATTR_RECIRC:
3488 if (*depth < MAX_RECIRC_DEPTH) {
3491 for (i = 0; i < cnt; i++) {
3492 struct dp_packet *recirc_pkt;
3494 recirc_pkt = (may_steal) ? packets[i]
3495 : dp_packet_clone(packets[i]);
3497 recirc_pkt->md.recirc_id = nl_attr_get_u32(a);
3499 /* Hash is private to each packet */
3500 recirc_pkt->md.dp_hash = dp_packet_get_dp_hash(packets[i]);
3502 dp_netdev_input(pmd, &recirc_pkt, 1);
3509 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3512 case OVS_ACTION_ATTR_PUSH_VLAN:
3513 case OVS_ACTION_ATTR_POP_VLAN:
3514 case OVS_ACTION_ATTR_PUSH_MPLS:
3515 case OVS_ACTION_ATTR_POP_MPLS:
3516 case OVS_ACTION_ATTR_SET:
3517 case OVS_ACTION_ATTR_SET_MASKED:
3518 case OVS_ACTION_ATTR_SAMPLE:
3519 case OVS_ACTION_ATTR_HASH:
3520 case OVS_ACTION_ATTR_UNSPEC:
3521 case __OVS_ACTION_ATTR_MAX:
3525 dp_netdev_drop_packets(packets, cnt, may_steal);
3529 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
3530 struct dp_packet **packets, int cnt,
3532 const struct nlattr *actions, size_t actions_len)
3534 struct dp_netdev_execute_aux aux = { pmd };
3536 odp_execute_actions(&aux, packets, cnt, may_steal, actions,
3537 actions_len, dp_execute_cb);
3540 const struct dpif_class dpif_netdev_class = {
3543 dpif_netdev_enumerate,
3544 dpif_netdev_port_open_type,
3547 dpif_netdev_destroy,
3550 dpif_netdev_get_stats,
3551 dpif_netdev_port_add,
3552 dpif_netdev_port_del,
3553 dpif_netdev_port_query_by_number,
3554 dpif_netdev_port_query_by_name,
3555 NULL, /* port_get_pid */
3556 dpif_netdev_port_dump_start,
3557 dpif_netdev_port_dump_next,
3558 dpif_netdev_port_dump_done,
3559 dpif_netdev_port_poll,
3560 dpif_netdev_port_poll_wait,
3561 dpif_netdev_flow_flush,
3562 dpif_netdev_flow_dump_create,
3563 dpif_netdev_flow_dump_destroy,
3564 dpif_netdev_flow_dump_thread_create,
3565 dpif_netdev_flow_dump_thread_destroy,
3566 dpif_netdev_flow_dump_next,
3567 dpif_netdev_operate,
3568 NULL, /* recv_set */
3569 NULL, /* handlers_set */
3570 dpif_netdev_pmd_set,
3571 dpif_netdev_queue_to_priority,
3573 NULL, /* recv_wait */
3574 NULL, /* recv_purge */
3575 dpif_netdev_register_upcall_cb,
3576 dpif_netdev_enable_upcall,
3577 dpif_netdev_disable_upcall,
3578 dpif_netdev_get_datapath_version,
3582 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
3583 const char *argv[], void *aux OVS_UNUSED)
3585 struct dp_netdev_port *old_port;
3586 struct dp_netdev_port *new_port;
3587 struct dp_netdev *dp;
3590 ovs_mutex_lock(&dp_netdev_mutex);
3591 dp = shash_find_data(&dp_netdevs, argv[1]);
3592 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3593 ovs_mutex_unlock(&dp_netdev_mutex);
3594 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3597 ovs_refcount_ref(&dp->ref_cnt);
3598 ovs_mutex_unlock(&dp_netdev_mutex);
3600 ovs_mutex_lock(&dp->port_mutex);
3601 if (get_port_by_name(dp, argv[2], &old_port)) {
3602 unixctl_command_reply_error(conn, "unknown port");
3606 port_no = u32_to_odp(atoi(argv[3]));
3607 if (!port_no || port_no == ODPP_NONE) {
3608 unixctl_command_reply_error(conn, "bad port number");
3611 if (dp_netdev_lookup_port(dp, port_no)) {
3612 unixctl_command_reply_error(conn, "port number already in use");
3616 /* Remove old port. */
3617 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3618 ovsrcu_postpone(free, old_port);
3620 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3621 new_port = xmemdup(old_port, sizeof *old_port);
3622 new_port->port_no = port_no;
3623 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3625 seq_change(dp->port_seq);
3626 unixctl_command_reply(conn, NULL);
3629 ovs_mutex_unlock(&dp->port_mutex);
3630 dp_netdev_unref(dp);
3634 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3635 const char *argv[], void *aux OVS_UNUSED)
3637 struct dp_netdev_port *port;
3638 struct dp_netdev *dp;
3640 ovs_mutex_lock(&dp_netdev_mutex);
3641 dp = shash_find_data(&dp_netdevs, argv[1]);
3642 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3643 ovs_mutex_unlock(&dp_netdev_mutex);
3644 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3647 ovs_refcount_ref(&dp->ref_cnt);
3648 ovs_mutex_unlock(&dp_netdev_mutex);
3650 ovs_mutex_lock(&dp->port_mutex);
3651 if (get_port_by_name(dp, argv[2], &port)) {
3652 unixctl_command_reply_error(conn, "unknown port");
3653 } else if (port->port_no == ODPP_LOCAL) {
3654 unixctl_command_reply_error(conn, "can't delete local port");
3656 do_del_port(dp, port);
3657 unixctl_command_reply(conn, NULL);
3659 ovs_mutex_unlock(&dp->port_mutex);
3661 dp_netdev_unref(dp);
3665 dpif_dummy_register__(const char *type)
3667 struct dpif_class *class;
3669 class = xmalloc(sizeof *class);
3670 *class = dpif_netdev_class;
3671 class->type = xstrdup(type);
3672 dp_register_provider(class);
3676 dpif_dummy_register(bool override)
3683 dp_enumerate_types(&types);
3684 SSET_FOR_EACH (type, &types) {
3685 if (!dp_unregister_provider(type)) {
3686 dpif_dummy_register__(type);
3689 sset_destroy(&types);
3692 dpif_dummy_register__("dummy");
3694 unixctl_command_register("dpif-dummy/change-port-number",
3695 "dp port new-number",
3696 3, 3, dpif_dummy_change_port_number, NULL);
3697 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3698 2, 2, dpif_dummy_delete_port, NULL);
3701 /* Datapath Classifier. */
3703 /* A set of rules that all have the same fields wildcarded. */
3704 struct dpcls_subtable {
3705 /* The fields are only used by writers. */
3706 struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
3708 /* These fields are accessed by readers. */
3709 struct cmap rules; /* Contains "struct dpcls_rule"s. */
3710 struct netdev_flow_key mask; /* Wildcards for fields (const). */
3711 /* 'mask' must be the last field, additional space is allocated here. */
3714 /* Initializes 'cls' as a classifier that initially contains no classification
3717 dpcls_init(struct dpcls *cls)
3719 cmap_init(&cls->subtables_map);
3720 pvector_init(&cls->subtables);
3724 dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
3726 pvector_remove(&cls->subtables, subtable);
3727 cmap_remove(&cls->subtables_map, &subtable->cmap_node,
3728 subtable->mask.hash);
3729 cmap_destroy(&subtable->rules);
3730 ovsrcu_postpone(free, subtable);
3733 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
3734 * caller's responsibility.
3735 * May only be called after all the readers have been terminated. */
3737 dpcls_destroy(struct dpcls *cls)
3740 struct dpcls_subtable *subtable;
3742 CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
3743 dpcls_destroy_subtable(cls, subtable);
3745 cmap_destroy(&cls->subtables_map);
3746 pvector_destroy(&cls->subtables);
3750 static struct dpcls_subtable *
3751 dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3753 struct dpcls_subtable *subtable;
3755 /* Need to add one. */
3756 subtable = xmalloc(sizeof *subtable
3757 - sizeof subtable->mask.mf + mask->len);
3758 cmap_init(&subtable->rules);
3759 netdev_flow_key_clone(&subtable->mask, mask);
3760 cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
3761 pvector_insert(&cls->subtables, subtable, 0);
3762 pvector_publish(&cls->subtables);
3767 static inline struct dpcls_subtable *
3768 dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
3770 struct dpcls_subtable *subtable;
3772 CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
3773 &cls->subtables_map) {
3774 if (netdev_flow_key_equal(&subtable->mask, mask)) {
3778 return dpcls_create_subtable(cls, mask);
3781 /* Insert 'rule' into 'cls'. */
3783 dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
3784 const struct netdev_flow_key *mask)
3786 struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
3788 rule->mask = &subtable->mask;
3789 cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
3792 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
3794 dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
3796 struct dpcls_subtable *subtable;
3798 ovs_assert(rule->mask);
3800 INIT_CONTAINER(subtable, rule->mask, mask);
3802 if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
3804 dpcls_destroy_subtable(cls, subtable);
3805 pvector_publish(&cls->subtables);
3809 /* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
3810 * in 'mask' the values in 'key' and 'target' are the same.
3812 * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
3814 dpcls_rule_matches_key(const struct dpcls_rule *rule,
3815 const struct netdev_flow_key *target)
3817 const uint64_t *keyp = rule->flow.mf.inline_values;
3818 const uint64_t *maskp = rule->mask->mf.inline_values;
3819 uint64_t target_u64;
3821 NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u64, target, rule->flow.mf.map) {
3822 if (OVS_UNLIKELY((target_u64 & *maskp++) != *keyp++)) {
3829 /* For each miniflow in 'flows' performs a classifier lookup writing the result
3830 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
3831 * NULL it is skipped.
3833 * This function is optimized for use in the userspace datapath and therefore
3834 * does not implement a lot of features available in the standard
3835 * classifier_lookup() function. Specifically, it does not implement
3836 * priorities, instead returning any rule which matches the flow.
3838 * Returns true if all flows found a corresponding rule. */
3840 dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
3841 struct dpcls_rule **rules, const size_t cnt)
3843 /* The batch size 16 was experimentally found faster than 8 or 32. */
3844 typedef uint16_t map_type;
3845 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
3847 #if !defined(__CHECKER__) && !defined(_WIN32)
3848 const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
3850 enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_RX_BATCH, MAP_BITS) };
3852 map_type maps[N_MAPS];
3853 struct dpcls_subtable *subtable;
3855 memset(maps, 0xff, sizeof maps);
3856 if (cnt % MAP_BITS) {
3857 maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
3859 memset(rules, 0, cnt * sizeof *rules);
3861 PVECTOR_FOR_EACH (subtable, &cls->subtables) {
3862 const struct netdev_flow_key *mkeys = keys;
3863 struct dpcls_rule **mrules = rules;
3864 map_type remains = 0;
3867 BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
3869 for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
3870 uint32_t hashes[MAP_BITS];
3871 const struct cmap_node *nodes[MAP_BITS];
3872 unsigned long map = maps[m];
3876 continue; /* Skip empty maps. */
3879 /* Compute hashes for the remaining keys. */
3880 ULONG_FOR_EACH_1(i, map) {
3881 hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
3885 map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
3886 /* Check results. */
3887 ULONG_FOR_EACH_1(i, map) {
3888 struct dpcls_rule *rule;
3890 CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
3891 if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
3896 ULONG_SET0(map, i); /* Did not match. */
3898 ; /* Keep Sparse happy. */
3900 maps[m] &= ~map; /* Clear the found rules. */
3904 return true; /* All found. */
3907 return false; /* Some misses. */