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>
34 #include "classifier.h"
38 #include "dpif-provider.h"
40 #include "dynamic-string.h"
41 #include "fat-rwlock.h"
46 #include "meta-flow.h"
48 #include "netdev-dpdk.h"
49 #include "netdev-vport.h"
51 #include "odp-execute.h"
53 #include "ofp-print.h"
57 #include "packet-dpif.h"
59 #include "poll-loop.h"
69 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
71 /* By default, choose a priority in the middle. */
72 #define NETDEV_RULE_PRIORITY 0x8000
74 #define FLOW_DUMP_MAX_BATCH 50
75 /* Use per thread recirc_depth to prevent recirculation loop. */
76 #define MAX_RECIRC_DEPTH 5
77 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
79 /* Configuration parameters. */
80 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
82 /* Protects against changes to 'dp_netdevs'. */
83 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
85 /* Contains all 'struct dp_netdev's. */
86 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
87 = SHASH_INITIALIZER(&dp_netdevs);
89 static struct vlog_rate_limit upcall_rl = VLOG_RATE_LIMIT_INIT(600, 600);
91 /* Stores a miniflow with inline values */
93 /* There are fields in the flow structure that we never use. Therefore we can
94 * save a few words of memory */
95 #define NETDEV_KEY_BUF_SIZE_U32 (FLOW_U32S \
97 - FLOW_U32_SIZE(regs) \
98 - FLOW_U32_SIZE(metadata) \
100 struct netdev_flow_key {
101 struct miniflow flow;
102 uint32_t buf[NETDEV_KEY_BUF_SIZE_U32];
105 /* Exact match cache for frequently used flows
107 * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
108 * search its entries for a miniflow that matches exactly the miniflow of the
109 * packet. It stores the 'cls_rule'(rule) that matches the miniflow.
111 * A cache entry holds a reference to its 'dp_netdev_flow'.
113 * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
114 * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
115 * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
116 * value is the index of a cache entry where the miniflow could be.
122 * Each pmd_thread has its own private exact match cache.
123 * If dp_netdev_input is not called from a pmd thread, a mutex is used.
126 #define EM_FLOW_HASH_SHIFT 10
127 #define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
128 #define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
129 #define EM_FLOW_HASH_SEGS 2
134 struct netdev_flow_key mf;
135 struct dp_netdev_flow *flow;
139 struct emc_entry entries[EM_FLOW_HASH_ENTRIES];
142 /* Iterate in the exact match cache through every entry that might contain a
143 * miniflow with hash 'HASH'. */
144 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
145 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
146 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
147 i__ < EM_FLOW_HASH_SEGS; \
148 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
150 /* Datapath based on the network device interface from netdev.h.
156 * Some members, marked 'const', are immutable. Accessing other members
157 * requires synchronization, as noted in more detail below.
159 * Acquisition order is, from outermost to innermost:
161 * dp_netdev_mutex (global)
166 const struct dpif_class *const class;
167 const char *const name;
169 struct ovs_refcount ref_cnt;
170 atomic_flag destroyed;
174 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
175 * changes to 'cls' must be made while still holding the 'flow_mutex'.
177 struct ovs_mutex flow_mutex;
178 struct classifier cls;
179 struct cmap flow_table OVS_GUARDED; /* Flow table. */
183 * ovsthread_stats is internally synchronized. */
184 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
188 * Protected by RCU. Take the mutex to add or remove ports. */
189 struct ovs_mutex port_mutex;
191 struct seq *port_seq; /* Incremented whenever a port changes. */
193 /* Protects access to ofproto-dpif-upcall interface during revalidator
194 * thread synchronization. */
195 struct fat_rwlock upcall_rwlock;
196 upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
199 /* Stores all 'struct dp_netdev_pmd_thread's. */
200 struct cmap poll_threads;
202 /* Protects the access of the 'struct dp_netdev_pmd_thread'
203 * instance for non-pmd thread. */
204 struct ovs_mutex non_pmd_mutex;
206 /* Each pmd thread will store its pointer to
207 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
208 ovsthread_key_t per_pmd_key;
210 /* Number of rx queues for each dpdk interface and the cpu mask
211 * for pin of pmd threads. */
216 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
220 DP_STAT_HIT, /* Packets that matched in the flow table. */
221 DP_STAT_MISS, /* Packets that did not match. */
222 DP_STAT_LOST, /* Packets not passed up to the client. */
226 /* Contained by struct dp_netdev's 'stats' member. */
227 struct dp_netdev_stats {
228 struct ovs_mutex mutex; /* Protects 'n'. */
230 /* Indexed by DP_STAT_*, protected by 'mutex'. */
231 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
235 /* A port in a netdev-based datapath. */
236 struct dp_netdev_port {
237 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
239 struct netdev *netdev;
240 struct netdev_saved_flags *sf;
241 struct netdev_rxq **rxq;
242 struct ovs_refcount ref_cnt;
243 char *type; /* Port type as requested by user. */
246 /* A flow in dp_netdev's 'flow_table'.
252 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
253 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
258 * The thread safety rules described here for "struct dp_netdev_flow" are
259 * motivated by two goals:
261 * - Prevent threads that read members of "struct dp_netdev_flow" from
262 * reading bad data due to changes by some thread concurrently modifying
265 * - Prevent two threads making changes to members of a given "struct
266 * dp_netdev_flow" from interfering with each other.
272 * A flow 'flow' may be accessed without a risk of being freed during an RCU
273 * grace period. Code that needs to hold onto a flow for a while
274 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
276 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
277 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
280 * Some members, marked 'const', are immutable. Accessing other members
281 * requires synchronization, as noted in more detail below.
283 struct dp_netdev_flow {
285 /* Packet classification. */
286 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
288 /* Hash table index by unmasked flow. */
289 const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
290 const struct flow flow; /* The flow that created this entry. */
292 /* Number of references.
293 * The classifier owns one reference.
294 * Any thread trying to keep a rule from being freed should hold its own
296 struct ovs_refcount ref_cnt;
300 * Reading or writing these members requires 'mutex'. */
301 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
304 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
307 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
308 static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
310 /* Contained by struct dp_netdev_flow's 'stats' member. */
311 struct dp_netdev_flow_stats {
312 struct ovs_mutex mutex; /* Guards all the other members. */
314 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
315 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
316 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
317 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
320 /* A set of datapath actions within a "struct dp_netdev_flow".
326 * A struct dp_netdev_actions 'actions' is protected with RCU. */
327 struct dp_netdev_actions {
328 /* These members are immutable: they do not change during the struct's
330 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
331 unsigned int size; /* Size of 'actions', in bytes. */
334 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
336 struct dp_netdev_actions *dp_netdev_flow_get_actions(
337 const struct dp_netdev_flow *);
338 static void dp_netdev_actions_free(struct dp_netdev_actions *);
340 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
341 * the performance overhead of interrupt processing. Therefore netdev can
342 * not implement rx-wait for these devices. dpif-netdev needs to poll
343 * these device to check for recv buffer. pmd-thread does polling for
344 * devices assigned to itself thread.
346 * DPDK used PMD for accessing NIC.
348 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
349 * I/O of all non-pmd threads. There will be no actual thread created
352 struct dp_netdev_pmd_thread {
353 struct dp_netdev *dp;
354 struct cmap_node node; /* In 'dp->poll_threads'. */
355 /* Per thread exact-match cache. Note, the instance for cpu core
356 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
357 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
358 * instances will only be accessed by its own pmd thread. */
359 struct emc_cache flow_cache;
360 struct latch exit_latch; /* For terminating the pmd thread. */
361 atomic_uint change_seq; /* For reloading pmd ports. */
363 int index; /* Idx of this pmd thread among pmd*/
364 /* threads on same numa node. */
365 int core_id; /* CPU core id of this pmd thread. */
366 int numa_id; /* numa node id of this pmd thread. */
369 #define PMD_INITIAL_SEQ 1
371 /* Interface to netdev-based datapath. */
374 struct dp_netdev *dp;
375 uint64_t last_port_seq;
378 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
379 struct dp_netdev_port **portp);
380 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
381 struct dp_netdev_port **portp);
382 static void dp_netdev_free(struct dp_netdev *)
383 OVS_REQUIRES(dp_netdev_mutex);
384 static void dp_netdev_flow_flush(struct dp_netdev *);
385 static int do_add_port(struct dp_netdev *dp, const char *devname,
386 const char *type, odp_port_t port_no)
387 OVS_REQUIRES(dp->port_mutex);
388 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
389 OVS_REQUIRES(dp->port_mutex);
390 static int dpif_netdev_open(const struct dpif_class *, const char *name,
391 bool create, struct dpif **);
392 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
393 struct dpif_packet **, int c,
394 bool may_steal, struct pkt_metadata *,
395 const struct nlattr *actions,
397 static void dp_netdev_input(struct dp_netdev_pmd_thread *,
398 struct dpif_packet **, int cnt,
399 struct pkt_metadata *);
400 static void dp_netdev_disable_upcall(struct dp_netdev *);
401 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
402 struct dp_netdev *dp, int index,
403 int core_id, int numa_id);
404 static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
405 static struct dp_netdev_pmd_thread *dp_netdev_get_nonpmd(struct dp_netdev *dp);
406 static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
407 static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
408 static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
409 static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
411 static void emc_clear_entry(struct emc_entry *ce);
414 emc_cache_init(struct emc_cache *flow_cache)
418 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
419 flow_cache->entries[i].flow = NULL;
420 flow_cache->entries[i].hash = 0;
421 flow_cache->entries[i].mf_len = 0;
422 miniflow_initialize(&flow_cache->entries[i].mf.flow,
423 flow_cache->entries[i].mf.buf);
428 emc_cache_uninit(struct emc_cache *flow_cache)
432 for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
433 emc_clear_entry(&flow_cache->entries[i]);
437 static struct dpif_netdev *
438 dpif_netdev_cast(const struct dpif *dpif)
440 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
441 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
444 static struct dp_netdev *
445 get_dp_netdev(const struct dpif *dpif)
447 return dpif_netdev_cast(dpif)->dp;
451 dpif_netdev_enumerate(struct sset *all_dps,
452 const struct dpif_class *dpif_class)
454 struct shash_node *node;
456 ovs_mutex_lock(&dp_netdev_mutex);
457 SHASH_FOR_EACH(node, &dp_netdevs) {
458 struct dp_netdev *dp = node->data;
459 if (dpif_class != dp->class) {
460 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
461 * If the class doesn't match, skip this dpif. */
464 sset_add(all_dps, node->name);
466 ovs_mutex_unlock(&dp_netdev_mutex);
472 dpif_netdev_class_is_dummy(const struct dpif_class *class)
474 return class != &dpif_netdev_class;
478 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
480 return strcmp(type, "internal") ? type
481 : dpif_netdev_class_is_dummy(class) ? "dummy"
486 create_dpif_netdev(struct dp_netdev *dp)
488 uint16_t netflow_id = hash_string(dp->name, 0);
489 struct dpif_netdev *dpif;
491 ovs_refcount_ref(&dp->ref_cnt);
493 dpif = xmalloc(sizeof *dpif);
494 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
496 dpif->last_port_seq = seq_read(dp->port_seq);
501 /* Choose an unused, non-zero port number and return it on success.
502 * Return ODPP_NONE on failure. */
504 choose_port(struct dp_netdev *dp, const char *name)
505 OVS_REQUIRES(dp->port_mutex)
509 if (dp->class != &dpif_netdev_class) {
513 /* If the port name begins with "br", start the number search at
514 * 100 to make writing tests easier. */
515 if (!strncmp(name, "br", 2)) {
519 /* If the port name contains a number, try to assign that port number.
520 * This can make writing unit tests easier because port numbers are
522 for (p = name; *p != '\0'; p++) {
523 if (isdigit((unsigned char) *p)) {
524 port_no = start_no + strtol(p, NULL, 10);
525 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
526 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
527 return u32_to_odp(port_no);
534 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
535 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
536 return u32_to_odp(port_no);
544 create_dp_netdev(const char *name, const struct dpif_class *class,
545 struct dp_netdev **dpp)
546 OVS_REQUIRES(dp_netdev_mutex)
548 struct dp_netdev *dp;
551 dp = xzalloc(sizeof *dp);
552 shash_add(&dp_netdevs, name, dp);
554 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
555 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
556 ovs_refcount_init(&dp->ref_cnt);
557 atomic_flag_clear(&dp->destroyed);
559 ovs_mutex_init(&dp->flow_mutex);
560 classifier_init(&dp->cls, NULL);
561 cmap_init(&dp->flow_table);
563 ovsthread_stats_init(&dp->stats);
565 ovs_mutex_init(&dp->port_mutex);
566 cmap_init(&dp->ports);
567 dp->port_seq = seq_create();
568 fat_rwlock_init(&dp->upcall_rwlock);
570 /* Disable upcalls by default. */
571 dp_netdev_disable_upcall(dp);
572 dp->upcall_aux = NULL;
573 dp->upcall_cb = NULL;
575 cmap_init(&dp->poll_threads);
576 ovs_mutex_init_recursive(&dp->non_pmd_mutex);
577 ovsthread_key_create(&dp->per_pmd_key, NULL);
579 /* Reserves the core NON_PMD_CORE_ID for all non-pmd threads. */
580 ovs_numa_try_pin_core_specific(NON_PMD_CORE_ID);
581 dp_netdev_set_nonpmd(dp);
582 dp->n_dpdk_rxqs = NR_QUEUE;
584 ovs_mutex_lock(&dp->port_mutex);
585 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
586 ovs_mutex_unlock(&dp->port_mutex);
597 dpif_netdev_open(const struct dpif_class *class, const char *name,
598 bool create, struct dpif **dpifp)
600 struct dp_netdev *dp;
603 ovs_mutex_lock(&dp_netdev_mutex);
604 dp = shash_find_data(&dp_netdevs, name);
606 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
608 error = (dp->class != class ? EINVAL
613 *dpifp = create_dpif_netdev(dp);
616 ovs_mutex_unlock(&dp_netdev_mutex);
622 dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
623 OVS_NO_THREAD_SAFETY_ANALYSIS
625 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
626 ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
628 /* Before freeing a lock we should release it */
629 fat_rwlock_unlock(&dp->upcall_rwlock);
630 fat_rwlock_destroy(&dp->upcall_rwlock);
633 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
634 * through the 'dp_netdevs' shash while freeing 'dp'. */
636 dp_netdev_free(struct dp_netdev *dp)
637 OVS_REQUIRES(dp_netdev_mutex)
639 struct dp_netdev_port *port;
640 struct dp_netdev_stats *bucket;
643 shash_find_and_delete(&dp_netdevs, dp->name);
645 dp_netdev_destroy_all_pmds(dp);
646 cmap_destroy(&dp->poll_threads);
647 ovs_mutex_destroy(&dp->non_pmd_mutex);
648 ovsthread_key_delete(dp->per_pmd_key);
650 dp_netdev_flow_flush(dp);
651 ovs_mutex_lock(&dp->port_mutex);
652 CMAP_FOR_EACH (port, node, &dp->ports) {
653 do_del_port(dp, port);
655 ovs_mutex_unlock(&dp->port_mutex);
657 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
658 ovs_mutex_destroy(&bucket->mutex);
659 free_cacheline(bucket);
661 ovsthread_stats_destroy(&dp->stats);
663 classifier_destroy(&dp->cls);
664 cmap_destroy(&dp->flow_table);
665 ovs_mutex_destroy(&dp->flow_mutex);
666 seq_destroy(dp->port_seq);
667 cmap_destroy(&dp->ports);
669 /* Upcalls must be disabled at this point */
670 dp_netdev_destroy_upcall_lock(dp);
673 free(CONST_CAST(char *, dp->name));
678 dp_netdev_unref(struct dp_netdev *dp)
681 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
682 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
683 ovs_mutex_lock(&dp_netdev_mutex);
684 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
687 ovs_mutex_unlock(&dp_netdev_mutex);
692 dpif_netdev_close(struct dpif *dpif)
694 struct dp_netdev *dp = get_dp_netdev(dpif);
701 dpif_netdev_destroy(struct dpif *dpif)
703 struct dp_netdev *dp = get_dp_netdev(dpif);
705 if (!atomic_flag_test_and_set(&dp->destroyed)) {
706 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
707 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
716 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
718 struct dp_netdev *dp = get_dp_netdev(dpif);
719 struct dp_netdev_stats *bucket;
722 stats->n_flows = cmap_count(&dp->flow_table);
724 stats->n_hit = stats->n_missed = stats->n_lost = 0;
725 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
726 ovs_mutex_lock(&bucket->mutex);
727 stats->n_hit += bucket->n[DP_STAT_HIT];
728 stats->n_missed += bucket->n[DP_STAT_MISS];
729 stats->n_lost += bucket->n[DP_STAT_LOST];
730 ovs_mutex_unlock(&bucket->mutex);
732 stats->n_masks = UINT32_MAX;
733 stats->n_mask_hit = UINT64_MAX;
739 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
743 atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
746 /* Causes all pmd threads to reload its tx/rx devices.
747 * Must be called after adding/removing ports. */
749 dp_netdev_reload_pmds(struct dp_netdev *dp)
751 struct dp_netdev_pmd_thread *pmd;
753 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
754 dp_netdev_reload_pmd__(pmd);
759 hash_port_no(odp_port_t port_no)
761 return hash_int(odp_to_u32(port_no), 0);
765 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
767 OVS_REQUIRES(dp->port_mutex)
769 struct netdev_saved_flags *sf;
770 struct dp_netdev_port *port;
771 struct netdev *netdev;
772 enum netdev_flags flags;
773 const char *open_type;
777 /* XXX reject devices already in some dp_netdev. */
779 /* Open and validate network device. */
780 open_type = dpif_netdev_port_open_type(dp->class, type);
781 error = netdev_open(devname, open_type, &netdev);
785 /* XXX reject non-Ethernet devices */
787 netdev_get_flags(netdev, &flags);
788 if (flags & NETDEV_LOOPBACK) {
789 VLOG_ERR("%s: cannot add a loopback device", devname);
790 netdev_close(netdev);
794 if (netdev_is_pmd(netdev)) {
795 int n_cores = ovs_numa_get_n_cores();
797 if (n_cores == OVS_CORE_UNSPEC) {
798 VLOG_ERR("%s, cannot get cpu core info", devname);
801 /* There can only be ovs_numa_get_n_cores() pmd threads,
802 * so creates a txq for each. */
803 error = netdev_set_multiq(netdev, n_cores, dp->n_dpdk_rxqs);
805 VLOG_ERR("%s, cannot set multiq", devname);
809 port = xzalloc(sizeof *port);
810 port->port_no = port_no;
811 port->netdev = netdev;
812 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
813 port->type = xstrdup(type);
814 for (i = 0; i < netdev_n_rxq(netdev); i++) {
815 error = netdev_rxq_open(netdev, &port->rxq[i], i);
817 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
818 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
819 devname, ovs_strerror(errno));
820 netdev_close(netdev);
828 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
830 for (i = 0; i < netdev_n_rxq(netdev); i++) {
831 netdev_rxq_close(port->rxq[i]);
833 netdev_close(netdev);
841 if (netdev_is_pmd(netdev)) {
842 dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
843 dp_netdev_reload_pmds(dp);
845 ovs_refcount_init(&port->ref_cnt);
847 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
848 seq_change(dp->port_seq);
854 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
855 odp_port_t *port_nop)
857 struct dp_netdev *dp = get_dp_netdev(dpif);
858 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
859 const char *dpif_port;
863 ovs_mutex_lock(&dp->port_mutex);
864 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
865 if (*port_nop != ODPP_NONE) {
867 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
869 port_no = choose_port(dp, dpif_port);
870 error = port_no == ODPP_NONE ? EFBIG : 0;
874 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
876 ovs_mutex_unlock(&dp->port_mutex);
882 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
884 struct dp_netdev *dp = get_dp_netdev(dpif);
887 ovs_mutex_lock(&dp->port_mutex);
888 if (port_no == ODPP_LOCAL) {
891 struct dp_netdev_port *port;
893 error = get_port_by_number(dp, port_no, &port);
895 do_del_port(dp, port);
898 ovs_mutex_unlock(&dp->port_mutex);
904 is_valid_port_number(odp_port_t port_no)
906 return port_no != ODPP_NONE;
909 static struct dp_netdev_port *
910 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
912 struct dp_netdev_port *port;
914 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
915 if (port->port_no == port_no) {
923 get_port_by_number(struct dp_netdev *dp,
924 odp_port_t port_no, struct dp_netdev_port **portp)
926 if (!is_valid_port_number(port_no)) {
930 *portp = dp_netdev_lookup_port(dp, port_no);
931 return *portp ? 0 : ENOENT;
936 port_ref(struct dp_netdev_port *port)
939 ovs_refcount_ref(&port->ref_cnt);
944 port_try_ref(struct dp_netdev_port *port)
947 return ovs_refcount_try_ref_rcu(&port->ref_cnt);
954 port_destroy__(struct dp_netdev_port *port)
956 int n_rxq = netdev_n_rxq(port->netdev);
959 netdev_close(port->netdev);
960 netdev_restore_flags(port->sf);
962 for (i = 0; i < n_rxq; i++) {
963 netdev_rxq_close(port->rxq[i]);
971 port_unref(struct dp_netdev_port *port)
973 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
974 ovsrcu_postpone(port_destroy__, port);
979 get_port_by_name(struct dp_netdev *dp,
980 const char *devname, struct dp_netdev_port **portp)
981 OVS_REQUIRES(dp->port_mutex)
983 struct dp_netdev_port *port;
985 CMAP_FOR_EACH (port, node, &dp->ports) {
986 if (!strcmp(netdev_get_name(port->netdev), devname)) {
995 get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
997 struct dp_netdev_pmd_thread *pmd;
1000 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
1001 if (pmd->numa_id == numa_id) {
1009 /* Returns 'true' if there is a port with pmd netdev and the netdev
1010 * is on numa node 'numa_id'. */
1012 has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
1014 struct dp_netdev_port *port;
1016 CMAP_FOR_EACH (port, node, &dp->ports) {
1017 if (netdev_is_pmd(port->netdev)
1018 && netdev_get_numa_id(port->netdev) == numa_id) {
1028 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
1029 OVS_REQUIRES(dp->port_mutex)
1031 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
1032 seq_change(dp->port_seq);
1033 if (netdev_is_pmd(port->netdev)) {
1034 int numa_id = netdev_get_numa_id(port->netdev);
1036 /* If there is no netdev on the numa node, deletes the pmd threads
1037 * for that numa. Else, just reloads the queues. */
1038 if (!has_pmd_port_for_numa(dp, numa_id)) {
1039 dp_netdev_del_pmds_on_numa(dp, numa_id);
1041 dp_netdev_reload_pmds(dp);
1048 answer_port_query(const struct dp_netdev_port *port,
1049 struct dpif_port *dpif_port)
1051 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
1052 dpif_port->type = xstrdup(port->type);
1053 dpif_port->port_no = port->port_no;
1057 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
1058 struct dpif_port *dpif_port)
1060 struct dp_netdev *dp = get_dp_netdev(dpif);
1061 struct dp_netdev_port *port;
1064 error = get_port_by_number(dp, port_no, &port);
1065 if (!error && dpif_port) {
1066 answer_port_query(port, dpif_port);
1073 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
1074 struct dpif_port *dpif_port)
1076 struct dp_netdev *dp = get_dp_netdev(dpif);
1077 struct dp_netdev_port *port;
1080 ovs_mutex_lock(&dp->port_mutex);
1081 error = get_port_by_name(dp, devname, &port);
1082 if (!error && dpif_port) {
1083 answer_port_query(port, dpif_port);
1085 ovs_mutex_unlock(&dp->port_mutex);
1091 dp_netdev_flow_free(struct dp_netdev_flow *flow)
1093 struct dp_netdev_flow_stats *bucket;
1096 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
1097 ovs_mutex_destroy(&bucket->mutex);
1098 free_cacheline(bucket);
1100 ovsthread_stats_destroy(&flow->stats);
1102 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
1103 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
1107 static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
1109 if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
1110 ovsrcu_postpone(dp_netdev_flow_free, flow);
1115 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
1116 OVS_REQUIRES(dp->flow_mutex)
1118 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
1119 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
1121 classifier_remove(&dp->cls, cr);
1122 cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
1125 dp_netdev_flow_unref(flow);
1129 dp_netdev_flow_flush(struct dp_netdev *dp)
1131 struct dp_netdev_flow *netdev_flow;
1133 ovs_mutex_lock(&dp->flow_mutex);
1134 CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
1135 dp_netdev_remove_flow(dp, netdev_flow);
1137 ovs_mutex_unlock(&dp->flow_mutex);
1141 dpif_netdev_flow_flush(struct dpif *dpif)
1143 struct dp_netdev *dp = get_dp_netdev(dpif);
1145 dp_netdev_flow_flush(dp);
1149 struct dp_netdev_port_state {
1150 struct cmap_position position;
1155 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1157 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1162 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1163 struct dpif_port *dpif_port)
1165 struct dp_netdev_port_state *state = state_;
1166 struct dp_netdev *dp = get_dp_netdev(dpif);
1167 struct cmap_node *node;
1170 node = cmap_next_position(&dp->ports, &state->position);
1172 struct dp_netdev_port *port;
1174 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1177 state->name = xstrdup(netdev_get_name(port->netdev));
1178 dpif_port->name = state->name;
1179 dpif_port->type = port->type;
1180 dpif_port->port_no = port->port_no;
1191 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1193 struct dp_netdev_port_state *state = state_;
1200 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1202 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1203 uint64_t new_port_seq;
1206 new_port_seq = seq_read(dpif->dp->port_seq);
1207 if (dpif->last_port_seq != new_port_seq) {
1208 dpif->last_port_seq = new_port_seq;
1218 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1220 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1222 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1225 static struct dp_netdev_flow *
1226 dp_netdev_flow_cast(const struct cls_rule *cr)
1228 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1231 static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
1233 return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
1236 /* netdev_flow_key utilities.
1238 * netdev_flow_key is basically a miniflow. We use these functions
1239 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1240 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1242 * - Since we are dealing exclusively with miniflows created by
1243 * miniflow_extract(), if the map is different the miniflow is different.
1244 * Therefore we can be faster by comparing the map and the miniflow in a
1246 * _ netdev_flow_key's miniflow has always inline values.
1247 * - These functions can be inlined by the compiler.
1249 * The following assertions make sure that what we're doing with miniflow is
1252 BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
1253 == sizeof(uint64_t));
1254 BUILD_ASSERT_DECL(offsetof(struct netdev_flow_key, flow) == 0);
1256 static inline struct netdev_flow_key *
1257 miniflow_to_netdev_flow_key(const struct miniflow *mf)
1259 return (struct netdev_flow_key *) CONST_CAST(struct miniflow *, mf);
1262 /* Given the number of bits set in the miniflow map, returns the size of the
1263 * netdev_flow key */
1264 static inline uint32_t
1265 netdev_flow_key_size(uint32_t flow_u32s)
1267 return MINIFLOW_VALUES_SIZE(flow_u32s)
1268 + offsetof(struct miniflow, inline_values);
1271 /* Used to compare 'netdev_flow_key's (miniflows) in the exact match cache. */
1273 netdev_flow_key_equal(const struct netdev_flow_key *a,
1274 const struct netdev_flow_key *b,
1277 return !memcmp(a, b, size);
1281 netdev_flow_key_clone(struct netdev_flow_key *dst,
1282 const struct netdev_flow_key *src,
1285 memcpy(dst, src, size);
1289 emc_entry_alive(struct emc_entry *ce)
1291 return ce->flow && !ce->flow->dead;
1295 emc_clear_entry(struct emc_entry *ce)
1298 dp_netdev_flow_unref(ce->flow);
1304 emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
1305 const struct netdev_flow_key *mf, uint32_t hash)
1307 if (ce->flow != flow) {
1309 dp_netdev_flow_unref(ce->flow);
1312 if (dp_netdev_flow_ref(flow)) {
1319 uint32_t mf_len = netdev_flow_key_size(count_1bits(mf->flow.map));
1321 netdev_flow_key_clone(&ce->mf, mf, mf_len);
1323 ce->mf_len = mf_len;
1328 emc_insert(struct emc_cache *cache, const struct miniflow *mf, uint32_t hash,
1329 struct dp_netdev_flow *flow)
1331 struct emc_entry *to_be_replaced = NULL;
1332 struct emc_entry *current_entry;
1334 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, hash) {
1335 if (current_entry->hash == hash
1336 && netdev_flow_key_equal(¤t_entry->mf,
1337 miniflow_to_netdev_flow_key(mf),
1338 current_entry->mf_len)) {
1340 /* We found the entry with the 'mf' miniflow */
1341 emc_change_entry(current_entry, flow, NULL, 0);
1345 /* Replacement policy: put the flow in an empty (not alive) entry, or
1346 * in the first entry where it can be */
1348 || (emc_entry_alive(to_be_replaced)
1349 && !emc_entry_alive(current_entry))
1350 || current_entry->hash < to_be_replaced->hash) {
1351 to_be_replaced = current_entry;
1354 /* We didn't find the miniflow in the cache.
1355 * The 'to_be_replaced' entry is where the new flow will be stored */
1357 emc_change_entry(to_be_replaced, flow, miniflow_to_netdev_flow_key(mf),
1361 static inline struct dp_netdev_flow *
1362 emc_lookup(struct emc_cache *cache, const struct miniflow *mf, uint32_t hash)
1364 struct emc_entry *current_entry;
1366 EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, hash) {
1367 if (current_entry->hash == hash && emc_entry_alive(current_entry)
1368 && netdev_flow_key_equal(¤t_entry->mf,
1369 miniflow_to_netdev_flow_key(mf),
1370 current_entry->mf_len)) {
1372 /* We found the entry with the 'mf' miniflow */
1373 return current_entry->flow;
1380 static struct dp_netdev_flow *
1381 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1383 struct dp_netdev_flow *netdev_flow;
1384 struct cls_rule *rule;
1386 classifier_lookup_miniflow_batch(&dp->cls, &key, &rule, 1);
1387 netdev_flow = dp_netdev_flow_cast(rule);
1392 static struct dp_netdev_flow *
1393 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1395 struct dp_netdev_flow *netdev_flow;
1397 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1399 if (flow_equal(&netdev_flow->flow, flow)) {
1408 get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow,
1409 struct dpif_flow_stats *stats)
1411 struct dp_netdev_flow_stats *bucket;
1414 memset(stats, 0, sizeof *stats);
1415 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1416 ovs_mutex_lock(&bucket->mutex);
1417 stats->n_packets += bucket->packet_count;
1418 stats->n_bytes += bucket->byte_count;
1419 stats->used = MAX(stats->used, bucket->used);
1420 stats->tcp_flags |= bucket->tcp_flags;
1421 ovs_mutex_unlock(&bucket->mutex);
1426 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
1427 struct ofpbuf *buffer, struct dpif_flow *flow)
1429 struct flow_wildcards wc;
1430 struct dp_netdev_actions *actions;
1432 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1433 odp_flow_key_from_mask(buffer, &wc.masks, &netdev_flow->flow,
1434 odp_to_u32(wc.masks.in_port.odp_port),
1436 flow->mask = ofpbuf_data(buffer);
1437 flow->mask_len = ofpbuf_size(buffer);
1439 actions = dp_netdev_flow_get_actions(netdev_flow);
1440 flow->actions = actions->actions;
1441 flow->actions_len = actions->size;
1443 get_dpif_flow_stats(netdev_flow, &flow->stats);
1447 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1448 const struct nlattr *mask_key,
1449 uint32_t mask_key_len, const struct flow *flow,
1453 enum odp_key_fitness fitness;
1455 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1457 /* This should not happen: it indicates that
1458 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1459 * disagree on the acceptable form of a mask. Log the problem
1460 * as an error, with enough details to enable debugging. */
1461 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1463 if (!VLOG_DROP_ERR(&rl)) {
1467 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1469 VLOG_ERR("internal error parsing flow mask %s (%s)",
1470 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1477 enum mf_field_id id;
1478 /* No mask key, unwildcard everything except fields whose
1479 * prerequisities are not met. */
1480 memset(mask, 0x0, sizeof *mask);
1482 for (id = 0; id < MFF_N_IDS; ++id) {
1483 /* Skip registers and metadata. */
1484 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1485 && id != MFF_METADATA) {
1486 const struct mf_field *mf = mf_from_id(id);
1487 if (mf_are_prereqs_ok(mf, flow)) {
1488 mf_mask_field(mf, mask);
1494 /* Force unwildcard the in_port.
1496 * We need to do this even in the case where we unwildcard "everything"
1497 * above because "everything" only includes the 16-bit OpenFlow port number
1498 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1499 * port number mask->in_port.odp_port. */
1500 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1506 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1511 if (odp_flow_key_to_flow(key, key_len, flow)) {
1512 /* This should not happen: it indicates that odp_flow_key_from_flow()
1513 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1514 * flow. Log the problem as an error, with enough details to enable
1516 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1518 if (!VLOG_DROP_ERR(&rl)) {
1522 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1523 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1530 in_port = flow->in_port.odp_port;
1531 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1539 dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
1541 struct dp_netdev *dp = get_dp_netdev(dpif);
1542 struct dp_netdev_flow *netdev_flow;
1546 error = dpif_netdev_flow_from_nlattrs(get->key, get->key_len, &key);
1551 netdev_flow = dp_netdev_find_flow(dp, &key);
1554 dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->flow);
1563 dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
1564 const struct nlattr *actions, size_t actions_len)
1565 OVS_REQUIRES(dp->flow_mutex)
1567 struct dp_netdev_flow *netdev_flow;
1569 netdev_flow = xzalloc(sizeof *netdev_flow);
1570 *CONST_CAST(struct flow *, &netdev_flow->flow) = match->flow;
1572 ovs_refcount_init(&netdev_flow->ref_cnt);
1574 ovsthread_stats_init(&netdev_flow->stats);
1576 ovsrcu_set(&netdev_flow->actions,
1577 dp_netdev_actions_create(actions, actions_len));
1579 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1580 match, NETDEV_RULE_PRIORITY);
1581 cmap_insert(&dp->flow_table,
1582 CONST_CAST(struct cmap_node *, &netdev_flow->node),
1583 flow_hash(&match->flow, 0));
1584 classifier_insert(&dp->cls,
1585 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1587 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
1588 struct ds ds = DS_EMPTY_INITIALIZER;
1590 ds_put_cstr(&ds, "flow_add: ");
1591 match_format(match, &ds, OFP_DEFAULT_PRIORITY);
1592 ds_put_cstr(&ds, ", actions:");
1593 format_odp_actions(&ds, actions, actions_len);
1595 VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
1604 clear_stats(struct dp_netdev_flow *netdev_flow)
1606 struct dp_netdev_flow_stats *bucket;
1609 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1610 ovs_mutex_lock(&bucket->mutex);
1612 bucket->packet_count = 0;
1613 bucket->byte_count = 0;
1614 bucket->tcp_flags = 0;
1615 ovs_mutex_unlock(&bucket->mutex);
1620 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1622 struct dp_netdev *dp = get_dp_netdev(dpif);
1623 struct dp_netdev_flow *netdev_flow;
1624 struct miniflow miniflow;
1628 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
1632 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1633 put->mask, put->mask_len,
1634 &match.flow, &match.wc.masks);
1638 miniflow_init(&miniflow, &match.flow);
1640 ovs_mutex_lock(&dp->flow_mutex);
1641 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1643 if (put->flags & DPIF_FP_CREATE) {
1644 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1646 memset(put->stats, 0, sizeof *put->stats);
1648 error = dp_netdev_flow_add(dp, &match, put->actions,
1657 if (put->flags & DPIF_FP_MODIFY
1658 && flow_equal(&match.flow, &netdev_flow->flow)) {
1659 struct dp_netdev_actions *new_actions;
1660 struct dp_netdev_actions *old_actions;
1662 new_actions = dp_netdev_actions_create(put->actions,
1665 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1666 ovsrcu_set(&netdev_flow->actions, new_actions);
1669 get_dpif_flow_stats(netdev_flow, put->stats);
1671 if (put->flags & DPIF_FP_ZERO_STATS) {
1672 clear_stats(netdev_flow);
1675 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1676 } else if (put->flags & DPIF_FP_CREATE) {
1679 /* Overlapping flow. */
1683 ovs_mutex_unlock(&dp->flow_mutex);
1684 miniflow_destroy(&miniflow);
1690 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1692 struct dp_netdev *dp = get_dp_netdev(dpif);
1693 struct dp_netdev_flow *netdev_flow;
1697 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1702 ovs_mutex_lock(&dp->flow_mutex);
1703 netdev_flow = dp_netdev_find_flow(dp, &key);
1706 get_dpif_flow_stats(netdev_flow, del->stats);
1708 dp_netdev_remove_flow(dp, netdev_flow);
1712 ovs_mutex_unlock(&dp->flow_mutex);
1717 struct dpif_netdev_flow_dump {
1718 struct dpif_flow_dump up;
1719 struct cmap_position pos;
1721 struct ovs_mutex mutex;
1724 static struct dpif_netdev_flow_dump *
1725 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1727 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1730 static struct dpif_flow_dump *
1731 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1733 struct dpif_netdev_flow_dump *dump;
1735 dump = xmalloc(sizeof *dump);
1736 dpif_flow_dump_init(&dump->up, dpif_);
1737 memset(&dump->pos, 0, sizeof dump->pos);
1739 ovs_mutex_init(&dump->mutex);
1745 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1747 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1749 ovs_mutex_destroy(&dump->mutex);
1754 struct dpif_netdev_flow_dump_thread {
1755 struct dpif_flow_dump_thread up;
1756 struct dpif_netdev_flow_dump *dump;
1757 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1758 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1761 static struct dpif_netdev_flow_dump_thread *
1762 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1764 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1767 static struct dpif_flow_dump_thread *
1768 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1770 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1771 struct dpif_netdev_flow_dump_thread *thread;
1773 thread = xmalloc(sizeof *thread);
1774 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1775 thread->dump = dump;
1780 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1782 struct dpif_netdev_flow_dump_thread *thread
1783 = dpif_netdev_flow_dump_thread_cast(thread_);
1789 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1790 struct dpif_flow *flows, int max_flows)
1792 struct dpif_netdev_flow_dump_thread *thread
1793 = dpif_netdev_flow_dump_thread_cast(thread_);
1794 struct dpif_netdev_flow_dump *dump = thread->dump;
1795 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1796 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1797 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1801 ovs_mutex_lock(&dump->mutex);
1802 if (!dump->status) {
1803 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1805 struct cmap_node *node;
1807 node = cmap_next_position(&dp->flow_table, &dump->pos);
1812 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
1816 ovs_mutex_unlock(&dump->mutex);
1818 for (i = 0; i < n_flows; i++) {
1819 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
1820 struct odputil_keybuf *keybuf = &thread->keybuf[i];
1821 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
1822 struct dpif_flow *f = &flows[i];
1823 struct dp_netdev_actions *dp_actions;
1824 struct flow_wildcards wc;
1827 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1830 ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
1831 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1832 netdev_flow->flow.in_port.odp_port, true);
1833 f->key = ofpbuf_data(&buf);
1834 f->key_len = ofpbuf_size(&buf);
1837 ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
1838 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1839 odp_to_u32(wc.masks.in_port.odp_port),
1841 f->mask = ofpbuf_data(&buf);
1842 f->mask_len = ofpbuf_size(&buf);
1845 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1846 f->actions = dp_actions->actions;
1847 f->actions_len = dp_actions->size;
1850 get_dpif_flow_stats(netdev_flow, &f->stats);
1857 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1858 OVS_NO_THREAD_SAFETY_ANALYSIS
1860 struct dp_netdev *dp = get_dp_netdev(dpif);
1861 struct dp_netdev_pmd_thread *pmd;
1862 struct dpif_packet packet, *pp;
1863 struct pkt_metadata *md = &execute->md;
1865 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1866 ofpbuf_size(execute->packet) > UINT16_MAX) {
1870 packet.ofpbuf = *execute->packet;
1873 /* Tries finding the 'pmd'. If NULL is returned, that means
1874 * the current thread is a non-pmd thread and should use
1875 * dp_netdev_get_nonpmd(). */
1876 pmd = ovsthread_getspecific(dp->per_pmd_key);
1878 pmd = dp_netdev_get_nonpmd(dp);
1881 /* If the current thread is non-pmd thread, acquires
1882 * the 'non_pmd_mutex'. */
1883 if (pmd->core_id == NON_PMD_CORE_ID) {
1884 ovs_mutex_lock(&dp->non_pmd_mutex);
1886 dp_netdev_execute_actions(pmd, &pp, 1, false, md, execute->actions,
1887 execute->actions_len);
1888 if (pmd->core_id == NON_PMD_CORE_ID) {
1889 ovs_mutex_unlock(&dp->non_pmd_mutex);
1892 /* Even though may_steal is set to false, some actions could modify or
1893 * reallocate the ofpbuf memory. We need to pass those changes to the
1895 *execute->packet = packet.ofpbuf;
1901 dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
1905 for (i = 0; i < n_ops; i++) {
1906 struct dpif_op *op = ops[i];
1909 case DPIF_OP_FLOW_PUT:
1910 op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
1913 case DPIF_OP_FLOW_DEL:
1914 op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
1917 case DPIF_OP_EXECUTE:
1918 op->error = dpif_netdev_execute(dpif, &op->u.execute);
1921 case DPIF_OP_FLOW_GET:
1922 op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
1928 /* Returns true if the configuration for rx queues or cpu mask
1931 pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
1933 if (dp->n_dpdk_rxqs != rxqs) {
1936 if (dp->pmd_cmask != NULL && cmask != NULL) {
1937 return strcmp(dp->pmd_cmask, cmask);
1939 return (dp->pmd_cmask != NULL || cmask != NULL);
1944 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
1946 dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
1948 struct dp_netdev *dp = get_dp_netdev(dpif);
1950 if (pmd_config_changed(dp, n_rxqs, cmask)) {
1951 struct dp_netdev_port *port;
1953 dp_netdev_destroy_all_pmds(dp);
1955 CMAP_FOR_EACH (port, node, &dp->ports) {
1956 if (netdev_is_pmd(port->netdev)) {
1959 /* Closes the existing 'rxq's. */
1960 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1961 netdev_rxq_close(port->rxq[i]);
1962 port->rxq[i] = NULL;
1965 /* Sets the new rx queue config. */
1966 err = netdev_set_multiq(port->netdev, ovs_numa_get_n_cores(),
1969 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
1970 " %u", netdev_get_name(port->netdev),
1975 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
1976 port->rxq = xrealloc(port->rxq, sizeof *port->rxq
1977 * netdev_n_rxq(port->netdev));
1978 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1979 netdev_rxq_open(port->netdev, &port->rxq[i], i);
1983 dp->n_dpdk_rxqs = n_rxqs;
1985 /* Reconfigures the cpu mask. */
1986 ovs_numa_set_cpu_mask(cmask);
1987 free(dp->pmd_cmask);
1988 dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
1990 /* Restores the non-pmd. */
1991 dp_netdev_set_nonpmd(dp);
1992 /* Restores all pmd threads. */
1993 dp_netdev_reset_pmd_threads(dp);
2000 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
2001 uint32_t queue_id, uint32_t *priority)
2003 *priority = queue_id;
2008 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
2009 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
2011 struct dp_netdev_actions *
2012 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
2014 struct dp_netdev_actions *netdev_actions;
2016 netdev_actions = xmalloc(sizeof *netdev_actions);
2017 netdev_actions->actions = xmemdup(actions, size);
2018 netdev_actions->size = size;
2020 return netdev_actions;
2023 struct dp_netdev_actions *
2024 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
2026 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
2030 dp_netdev_actions_free(struct dp_netdev_actions *actions)
2032 free(actions->actions);
2038 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
2039 struct dp_netdev_port *port,
2040 struct netdev_rxq *rxq)
2042 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2045 error = netdev_rxq_recv(rxq, packets, &cnt);
2047 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
2049 *recirc_depth_get() = 0;
2050 dp_netdev_input(pmd, packets, cnt, &md);
2051 } else if (error != EAGAIN && error != EOPNOTSUPP) {
2052 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2054 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
2055 netdev_get_name(port->netdev), ovs_strerror(error));
2060 dpif_netdev_run(struct dpif *dpif)
2062 struct dp_netdev_port *port;
2063 struct dp_netdev *dp = get_dp_netdev(dpif);
2064 struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_nonpmd(dp);
2066 ovs_mutex_lock(&dp->non_pmd_mutex);
2067 CMAP_FOR_EACH (port, node, &dp->ports) {
2068 if (!netdev_is_pmd(port->netdev)) {
2071 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2072 dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
2076 ovs_mutex_unlock(&dp->non_pmd_mutex);
2080 dpif_netdev_wait(struct dpif *dpif)
2082 struct dp_netdev_port *port;
2083 struct dp_netdev *dp = get_dp_netdev(dpif);
2085 ovs_mutex_lock(&dp_netdev_mutex);
2086 CMAP_FOR_EACH (port, node, &dp->ports) {
2087 if (!netdev_is_pmd(port->netdev)) {
2090 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2091 netdev_rxq_wait(port->rxq[i]);
2095 ovs_mutex_unlock(&dp_netdev_mutex);
2099 struct dp_netdev_port *port;
2100 struct netdev_rxq *rx;
2104 pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
2105 struct rxq_poll **ppoll_list, int poll_cnt)
2107 struct rxq_poll *poll_list = *ppoll_list;
2108 struct dp_netdev_port *port;
2109 int n_pmds_on_numa, index, i;
2111 /* Simple scheduler for netdev rx polling. */
2112 for (i = 0; i < poll_cnt; i++) {
2113 port_unref(poll_list[i].port);
2117 n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
2120 CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
2121 /* Calls port_try_ref() to prevent the main thread
2122 * from deleting the port. */
2123 if (port_try_ref(port)) {
2124 if (netdev_is_pmd(port->netdev)
2125 && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
2128 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
2129 if ((index % n_pmds_on_numa) == pmd->index) {
2130 poll_list = xrealloc(poll_list,
2131 sizeof *poll_list * (poll_cnt + 1));
2134 poll_list[poll_cnt].port = port;
2135 poll_list[poll_cnt].rx = port->rxq[i];
2141 /* Unrefs the port_try_ref(). */
2146 *ppoll_list = poll_list;
2151 pmd_thread_main(void *f_)
2153 struct dp_netdev_pmd_thread *pmd = f_;
2154 unsigned int lc = 0;
2155 struct rxq_poll *poll_list;
2156 unsigned int port_seq = PMD_INITIAL_SEQ;
2163 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2164 ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
2165 pmd_thread_setaffinity_cpu(pmd->core_id);
2167 emc_cache_init(&pmd->flow_cache);
2168 poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
2173 for (i = 0; i < poll_cnt; i++) {
2174 dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
2184 atomic_read_relaxed(&pmd->change_seq, &seq);
2185 if (seq != port_seq) {
2192 emc_cache_uninit(&pmd->flow_cache);
2194 if (!latch_is_set(&pmd->exit_latch)){
2198 for (i = 0; i < poll_cnt; i++) {
2199 port_unref(poll_list[i].port);
2207 dp_netdev_disable_upcall(struct dp_netdev *dp)
2208 OVS_ACQUIRES(dp->upcall_rwlock)
2210 fat_rwlock_wrlock(&dp->upcall_rwlock);
2214 dpif_netdev_disable_upcall(struct dpif *dpif)
2215 OVS_NO_THREAD_SAFETY_ANALYSIS
2217 struct dp_netdev *dp = get_dp_netdev(dpif);
2218 dp_netdev_disable_upcall(dp);
2222 dp_netdev_enable_upcall(struct dp_netdev *dp)
2223 OVS_RELEASES(dp->upcall_rwlock)
2225 fat_rwlock_unlock(&dp->upcall_rwlock);
2229 dpif_netdev_enable_upcall(struct dpif *dpif)
2230 OVS_NO_THREAD_SAFETY_ANALYSIS
2232 struct dp_netdev *dp = get_dp_netdev(dpif);
2233 dp_netdev_enable_upcall(dp);
2236 /* Returns the pointer to the dp_netdev_pmd_thread for non-pmd threads. */
2237 static struct dp_netdev_pmd_thread *
2238 dp_netdev_get_nonpmd(struct dp_netdev *dp)
2240 struct dp_netdev_pmd_thread *pmd;
2241 const struct cmap_node *pnode;
2243 pnode = cmap_find(&dp->poll_threads, hash_int(NON_PMD_CORE_ID, 0));
2245 pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
2250 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2252 dp_netdev_set_nonpmd(struct dp_netdev *dp)
2254 struct dp_netdev_pmd_thread *non_pmd;
2256 non_pmd = xzalloc(sizeof *non_pmd);
2257 dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
2261 /* Configures the 'pmd' based on the input argument. */
2263 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
2264 int index, int core_id, int numa_id)
2268 pmd->core_id = core_id;
2269 pmd->numa_id = numa_id;
2270 latch_init(&pmd->exit_latch);
2271 atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
2272 /* init the 'flow_cache' since there is no
2273 * actual thread created for NON_PMD_CORE_ID. */
2274 if (core_id == NON_PMD_CORE_ID) {
2275 emc_cache_init(&pmd->flow_cache);
2277 cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
2278 hash_int(core_id, 0));
2281 /* Stops the pmd thread, removes it from the 'dp->poll_threads'
2282 * and destroys the struct. */
2284 dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
2286 /* Uninit the 'flow_cache' since there is
2287 * no actual thread uninit it. */
2288 if (pmd->core_id == NON_PMD_CORE_ID) {
2289 emc_cache_uninit(&pmd->flow_cache);
2291 latch_set(&pmd->exit_latch);
2292 dp_netdev_reload_pmd__(pmd);
2293 ovs_numa_unpin_core(pmd->core_id);
2294 xpthread_join(pmd->thread, NULL);
2296 cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
2297 latch_destroy(&pmd->exit_latch);
2301 /* Destroys all pmd threads. */
2303 dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
2305 struct dp_netdev_pmd_thread *pmd;
2307 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2308 dp_netdev_del_pmd(pmd);
2312 /* Deletes all pmd threads on numa node 'numa_id'. */
2314 dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2316 struct dp_netdev_pmd_thread *pmd;
2318 CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
2319 if (pmd->numa_id == numa_id) {
2320 dp_netdev_del_pmd(pmd);
2325 /* Checks the numa node id of 'netdev' and starts pmd threads for
2328 dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
2332 if (!ovs_numa_numa_id_is_valid(numa_id)) {
2333 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
2334 "invalid", numa_id);
2338 n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
2340 /* If there are already pmd threads created for the numa node
2341 * in which 'netdev' is on, do nothing. Else, creates the
2342 * pmd threads for the numa node. */
2344 int can_have, n_unpinned, i;
2346 n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
2348 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
2349 "cores on numa node");
2353 /* If cpu mask is specified, uses all unpinned cores, otherwise
2354 * tries creating NR_PMD_THREADS pmd threads. */
2355 can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
2356 for (i = 0; i < can_have; i++) {
2357 struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
2358 int core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
2360 dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
2361 /* Each thread will distribute all devices rx-queues among
2363 pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
2365 VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
2371 dp_netdev_flow_stats_new_cb(void)
2373 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2374 ovs_mutex_init(&bucket->mutex);
2378 /* Called after pmd threads config change. Restarts pmd threads with
2379 * new configuration. */
2381 dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
2383 struct dp_netdev_port *port;
2385 CMAP_FOR_EACH (port, node, &dp->ports) {
2386 if (netdev_is_pmd(port->netdev)) {
2387 int numa_id = netdev_get_numa_id(port->netdev);
2389 dp_netdev_set_pmds_on_numa(dp, numa_id);
2395 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
2399 long long int now = time_msec();
2400 struct dp_netdev_flow_stats *bucket;
2402 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
2403 dp_netdev_flow_stats_new_cb);
2405 ovs_mutex_lock(&bucket->mutex);
2406 bucket->used = MAX(now, bucket->used);
2407 bucket->packet_count += cnt;
2408 bucket->byte_count += size;
2409 bucket->tcp_flags |= tcp_flags;
2410 ovs_mutex_unlock(&bucket->mutex);
2414 dp_netdev_stats_new_cb(void)
2416 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
2417 ovs_mutex_init(&bucket->mutex);
2422 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
2424 struct dp_netdev_stats *bucket;
2426 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2427 ovs_mutex_lock(&bucket->mutex);
2428 bucket->n[type] += cnt;
2429 ovs_mutex_unlock(&bucket->mutex);
2433 dp_netdev_upcall(struct dp_netdev *dp, struct dpif_packet *packet_,
2434 struct flow *flow, struct flow_wildcards *wc,
2435 enum dpif_upcall_type type, const struct nlattr *userdata,
2436 struct ofpbuf *actions, struct ofpbuf *put_actions)
2438 struct ofpbuf *packet = &packet_->ofpbuf;
2440 if (type == DPIF_UC_MISS) {
2441 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2444 if (OVS_UNLIKELY(!dp->upcall_cb)) {
2448 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
2449 struct ds ds = DS_EMPTY_INITIALIZER;
2453 ofpbuf_init(&key, 0);
2454 odp_flow_key_from_flow(&key, flow, &wc->masks, flow->in_port.odp_port,
2457 packet_str = ofp_packet_to_string(ofpbuf_data(packet),
2458 ofpbuf_size(packet));
2460 odp_flow_key_format(ofpbuf_data(&key), ofpbuf_size(&key), &ds);
2462 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
2463 dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
2465 ofpbuf_uninit(&key);
2470 return dp->upcall_cb(packet, flow, type, userdata, actions, wc,
2471 put_actions, dp->upcall_aux);
2474 static inline uint32_t
2475 dpif_netdev_packet_get_dp_hash(struct dpif_packet *packet,
2476 const struct miniflow *mf)
2480 hash = dpif_packet_get_dp_hash(packet);
2481 if (OVS_UNLIKELY(!hash)) {
2482 hash = miniflow_hash_5tuple(mf, 0);
2483 dpif_packet_set_dp_hash(packet, hash);
2488 struct packet_batch {
2489 unsigned int packet_count;
2490 unsigned int byte_count;
2493 struct dp_netdev_flow *flow;
2495 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2496 struct pkt_metadata md;
2500 packet_batch_update(struct packet_batch *batch, struct dpif_packet *packet,
2501 const struct miniflow *mf)
2503 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2504 batch->packets[batch->packet_count++] = packet;
2505 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2509 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow,
2510 struct pkt_metadata *md)
2515 batch->packet_count = 0;
2516 batch->byte_count = 0;
2517 batch->tcp_flags = 0;
2521 packet_batch_execute(struct packet_batch *batch,
2522 struct dp_netdev_pmd_thread *pmd)
2524 struct dp_netdev_actions *actions;
2525 struct dp_netdev_flow *flow = batch->flow;
2527 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2530 actions = dp_netdev_flow_get_actions(flow);
2532 dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
2533 &batch->md, actions->actions, actions->size);
2535 dp_netdev_count_packet(pmd->dp, DP_STAT_HIT, batch->packet_count);
2539 dp_netdev_queue_batches(struct dpif_packet *pkt, struct pkt_metadata *md,
2540 struct dp_netdev_flow *flow, const struct miniflow *mf,
2541 struct packet_batch *batches, size_t *n_batches,
2544 struct packet_batch *batch = NULL;
2547 if (OVS_UNLIKELY(!flow)) {
2550 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2551 * assumption that the number of distinct flows (and therefore the
2552 * number of distinct batches) is quite small. If this turns out not
2553 * to be the case, it may make sense to pre sort based on the
2554 * netdev_flow pointer. That done we can get the appropriate batching
2555 * in O(n * log(n)) instead. */
2556 for (j = *n_batches - 1; j >= 0; j--) {
2557 if (batches[j].flow == flow) {
2558 batch = &batches[j];
2559 packet_batch_update(batch, pkt, mf);
2563 if (OVS_UNLIKELY(*n_batches >= max_batches)) {
2567 batch = &batches[(*n_batches)++];
2568 packet_batch_init(batch, flow, md);
2569 packet_batch_update(batch, pkt, mf);
2574 dpif_packet_swap(struct dpif_packet **a, struct dpif_packet **b)
2576 struct dpif_packet *tmp = *a;
2581 /* Try to process all ('cnt') the 'packets' using only the exact match cache
2582 * 'flow_cache'. If a flow is not found for a packet 'packets[i]', or if there
2583 * is no matching batch for a packet's flow, the miniflow is copied into 'keys'
2584 * and the packet pointer is moved at the beginning of the 'packets' array.
2586 * The function returns the number of packets that needs to be processed in the
2587 * 'packets' array (they have been moved to the beginning of the vector).
2589 static inline size_t
2590 emc_processing(struct dp_netdev_pmd_thread *pmd, struct dpif_packet **packets,
2591 size_t cnt, struct pkt_metadata *md,
2592 struct netdev_flow_key *keys)
2594 struct netdev_flow_key key;
2595 struct packet_batch batches[4];
2596 struct emc_cache *flow_cache = &pmd->flow_cache;
2597 size_t n_batches, i;
2598 size_t notfound_cnt = 0;
2601 miniflow_initialize(&key.flow, key.buf);
2602 for (i = 0; i < cnt; i++) {
2603 struct dp_netdev_flow *flow;
2606 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2607 dpif_packet_delete(packets[i]);
2611 miniflow_extract(&packets[i]->ofpbuf, md, &key.flow);
2613 hash = dpif_netdev_packet_get_dp_hash(packets[i], &key.flow);
2615 flow = emc_lookup(flow_cache, &key.flow, hash);
2616 if (OVS_UNLIKELY(!dp_netdev_queue_batches(packets[i], md,
2618 batches, &n_batches,
2619 ARRAY_SIZE(batches)))) {
2620 if (i != notfound_cnt) {
2621 dpif_packet_swap(&packets[i], &packets[notfound_cnt]);
2624 keys[notfound_cnt++] = key;
2628 for (i = 0; i < n_batches; i++) {
2629 packet_batch_execute(&batches[i], pmd);
2632 return notfound_cnt;
2636 fast_path_processing(struct dp_netdev_pmd_thread *pmd,
2637 struct dpif_packet **packets, size_t cnt,
2638 struct pkt_metadata *md, struct netdev_flow_key *keys)
2640 #if !defined(__CHECKER__) && !defined(_WIN32)
2641 const size_t PKT_ARRAY_SIZE = cnt;
2643 /* Sparse or MSVC doesn't like variable length array. */
2644 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2646 struct packet_batch batches[PKT_ARRAY_SIZE];
2647 const struct miniflow *mfs[PKT_ARRAY_SIZE]; /* May NOT be NULL. */
2648 struct cls_rule *rules[PKT_ARRAY_SIZE];
2649 struct dp_netdev *dp = pmd->dp;
2650 struct emc_cache *flow_cache = &pmd->flow_cache;
2651 size_t n_batches, i;
2654 for (i = 0; i < cnt; i++) {
2655 mfs[i] = &keys[i].flow; /* No bad packets! */
2657 any_miss = !classifier_lookup_miniflow_batch(&dp->cls, mfs, rules, cnt);
2658 if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2659 uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
2660 struct ofpbuf actions, put_actions;
2663 ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
2664 ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
2666 for (i = 0; i < cnt; i++) {
2667 const struct dp_netdev_flow *netdev_flow;
2668 struct ofpbuf *add_actions;
2671 if (OVS_LIKELY(rules[i] || !mfs[i])) {
2675 /* It's possible that an earlier slow path execution installed
2676 * the rule this flow needs. In this case, it's a lot cheaper
2677 * to catch it here than execute a miss. */
2678 netdev_flow = dp_netdev_lookup_flow(dp, mfs[i]);
2680 rules[i] = CONST_CAST(struct cls_rule *, &netdev_flow->cr);
2684 miniflow_expand(mfs[i], &match.flow);
2686 ofpbuf_clear(&actions);
2687 ofpbuf_clear(&put_actions);
2689 error = dp_netdev_upcall(dp, packets[i], &match.flow, &match.wc,
2690 DPIF_UC_MISS, NULL, &actions,
2692 if (OVS_UNLIKELY(error && error != ENOSPC)) {
2696 /* We can't allow the packet batching in the next loop to execute
2697 * the actions. Otherwise, if there are any slow path actions,
2698 * we'll send the packet up twice. */
2699 dp_netdev_execute_actions(pmd, &packets[i], 1, true, md,
2700 ofpbuf_data(&actions),
2701 ofpbuf_size(&actions));
2703 add_actions = ofpbuf_size(&put_actions)
2707 ovs_mutex_lock(&dp->flow_mutex);
2708 /* XXX: There's a brief race where this flow could have already
2709 * been installed since we last did the flow lookup. This could be
2710 * solved by moving the mutex lock outside the loop, but that's an
2711 * awful long time to be locking everyone out of making flow
2712 * installs. If we move to a per-core classifier, it would be
2714 if (OVS_LIKELY(error != ENOSPC)
2715 && !dp_netdev_lookup_flow(dp, mfs[i])) {
2716 dp_netdev_flow_add(dp, &match, ofpbuf_data(add_actions),
2717 ofpbuf_size(add_actions));
2719 ovs_mutex_unlock(&dp->flow_mutex);
2722 ofpbuf_uninit(&actions);
2723 ofpbuf_uninit(&put_actions);
2724 fat_rwlock_unlock(&dp->upcall_rwlock);
2725 } else if (OVS_UNLIKELY(any_miss)) {
2726 int dropped_cnt = 0;
2728 for (i = 0; i < cnt; i++) {
2729 if (OVS_UNLIKELY(!rules[i] && mfs[i])) {
2730 dpif_packet_delete(packets[i]);
2735 dp_netdev_count_packet(dp, DP_STAT_LOST, dropped_cnt);
2739 for (i = 0; i < cnt; i++) {
2740 struct dpif_packet *packet = packets[i];
2741 struct dp_netdev_flow *flow;
2743 if (OVS_UNLIKELY(!rules[i] || !mfs[i])) {
2747 flow = dp_netdev_flow_cast(rules[i]);
2748 emc_insert(flow_cache, mfs[i], dpif_packet_get_dp_hash(packet),
2750 dp_netdev_queue_batches(packet, md, flow, mfs[i], batches, &n_batches,
2751 ARRAY_SIZE(batches));
2754 for (i = 0; i < n_batches; i++) {
2755 packet_batch_execute(&batches[i], pmd);
2760 dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
2761 struct dpif_packet **packets, int cnt, struct pkt_metadata *md)
2763 #if !defined(__CHECKER__) && !defined(_WIN32)
2764 const size_t PKT_ARRAY_SIZE = cnt;
2766 /* Sparse or MSVC doesn't like variable length array. */
2767 enum { PKT_ARRAY_SIZE = NETDEV_MAX_RX_BATCH };
2769 struct netdev_flow_key keys[PKT_ARRAY_SIZE];
2772 newcnt = emc_processing(pmd, packets, cnt, md, keys);
2773 if (OVS_UNLIKELY(newcnt)) {
2774 fast_path_processing(pmd, packets, newcnt, md, keys);
2778 struct dp_netdev_execute_aux {
2779 struct dp_netdev_pmd_thread *pmd;
2783 dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
2786 struct dp_netdev *dp = get_dp_netdev(dpif);
2787 dp->upcall_aux = aux;
2792 dp_netdev_drop_packets(struct dpif_packet ** packets, int cnt, bool may_steal)
2797 for (i = 0; i < cnt; i++) {
2798 dpif_packet_delete(packets[i]);
2804 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
2805 struct pkt_metadata *md,
2806 const struct nlattr *a, bool may_steal)
2807 OVS_NO_THREAD_SAFETY_ANALYSIS
2809 struct dp_netdev_execute_aux *aux = aux_;
2810 uint32_t *depth = recirc_depth_get();
2811 struct dp_netdev_pmd_thread *pmd= aux->pmd;
2812 struct dp_netdev *dp= pmd->dp;
2813 int type = nl_attr_type(a);
2814 struct dp_netdev_port *p;
2817 switch ((enum ovs_action_attr)type) {
2818 case OVS_ACTION_ATTR_OUTPUT:
2819 p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
2820 if (OVS_LIKELY(p)) {
2821 netdev_send(p->netdev, pmd->core_id, packets, cnt, may_steal);
2826 case OVS_ACTION_ATTR_USERSPACE:
2827 if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
2828 const struct nlattr *userdata;
2829 struct ofpbuf actions;
2832 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2833 ofpbuf_init(&actions, 0);
2835 for (i = 0; i < cnt; i++) {
2838 ofpbuf_clear(&actions);
2840 flow_extract(&packets[i]->ofpbuf, md, &flow);
2841 error = dp_netdev_upcall(dp, packets[i], &flow, NULL,
2842 DPIF_UC_ACTION, userdata, &actions,
2844 if (!error || error == ENOSPC) {
2845 dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
2846 md, ofpbuf_data(&actions),
2847 ofpbuf_size(&actions));
2848 } else if (may_steal) {
2849 dpif_packet_delete(packets[i]);
2852 ofpbuf_uninit(&actions);
2853 fat_rwlock_unlock(&dp->upcall_rwlock);
2859 case OVS_ACTION_ATTR_HASH: {
2860 const struct ovs_action_hash *hash_act;
2863 hash_act = nl_attr_get(a);
2865 for (i = 0; i < cnt; i++) {
2867 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2868 /* Hash need not be symmetric, nor does it need to include
2870 hash = hash_2words(dpif_packet_get_dp_hash(packets[i]),
2871 hash_act->hash_basis);
2873 VLOG_WARN("Unknown hash algorithm specified "
2874 "for the hash action.");
2879 hash = 1; /* 0 is not valid */
2885 dpif_packet_set_dp_hash(packets[i], hash);
2890 case OVS_ACTION_ATTR_RECIRC:
2891 if (*depth < MAX_RECIRC_DEPTH) {
2894 for (i = 0; i < cnt; i++) {
2895 struct dpif_packet *recirc_pkt;
2896 struct pkt_metadata recirc_md = *md;
2898 recirc_pkt = (may_steal) ? packets[i]
2899 : dpif_packet_clone(packets[i]);
2901 recirc_md.recirc_id = nl_attr_get_u32(a);
2903 /* Hash is private to each packet */
2904 recirc_md.dp_hash = dpif_packet_get_dp_hash(packets[i]);
2906 dp_netdev_input(pmd, &recirc_pkt, 1,
2914 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2917 case OVS_ACTION_ATTR_PUSH_VLAN:
2918 case OVS_ACTION_ATTR_POP_VLAN:
2919 case OVS_ACTION_ATTR_PUSH_MPLS:
2920 case OVS_ACTION_ATTR_POP_MPLS:
2921 case OVS_ACTION_ATTR_SET:
2922 case OVS_ACTION_ATTR_SET_MASKED:
2923 case OVS_ACTION_ATTR_SAMPLE:
2924 case OVS_ACTION_ATTR_UNSPEC:
2925 case __OVS_ACTION_ATTR_MAX:
2929 dp_netdev_drop_packets(packets, cnt, may_steal);
2933 dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
2934 struct dpif_packet **packets, int cnt,
2935 bool may_steal, struct pkt_metadata *md,
2936 const struct nlattr *actions, size_t actions_len)
2938 struct dp_netdev_execute_aux aux = {pmd};
2940 odp_execute_actions(&aux, packets, cnt, may_steal, md, actions,
2941 actions_len, dp_execute_cb);
2944 const struct dpif_class dpif_netdev_class = {
2946 dpif_netdev_enumerate,
2947 dpif_netdev_port_open_type,
2950 dpif_netdev_destroy,
2953 dpif_netdev_get_stats,
2954 dpif_netdev_port_add,
2955 dpif_netdev_port_del,
2956 dpif_netdev_port_query_by_number,
2957 dpif_netdev_port_query_by_name,
2958 NULL, /* port_get_pid */
2959 dpif_netdev_port_dump_start,
2960 dpif_netdev_port_dump_next,
2961 dpif_netdev_port_dump_done,
2962 dpif_netdev_port_poll,
2963 dpif_netdev_port_poll_wait,
2964 dpif_netdev_flow_flush,
2965 dpif_netdev_flow_dump_create,
2966 dpif_netdev_flow_dump_destroy,
2967 dpif_netdev_flow_dump_thread_create,
2968 dpif_netdev_flow_dump_thread_destroy,
2969 dpif_netdev_flow_dump_next,
2970 dpif_netdev_operate,
2971 NULL, /* recv_set */
2972 NULL, /* handlers_set */
2973 dpif_netdev_pmd_set,
2974 dpif_netdev_queue_to_priority,
2976 NULL, /* recv_wait */
2977 NULL, /* recv_purge */
2978 dpif_netdev_register_upcall_cb,
2979 dpif_netdev_enable_upcall,
2980 dpif_netdev_disable_upcall,
2984 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2985 const char *argv[], void *aux OVS_UNUSED)
2987 struct dp_netdev_port *old_port;
2988 struct dp_netdev_port *new_port;
2989 struct dp_netdev *dp;
2992 ovs_mutex_lock(&dp_netdev_mutex);
2993 dp = shash_find_data(&dp_netdevs, argv[1]);
2994 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2995 ovs_mutex_unlock(&dp_netdev_mutex);
2996 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2999 ovs_refcount_ref(&dp->ref_cnt);
3000 ovs_mutex_unlock(&dp_netdev_mutex);
3002 ovs_mutex_lock(&dp->port_mutex);
3003 if (get_port_by_name(dp, argv[2], &old_port)) {
3004 unixctl_command_reply_error(conn, "unknown port");
3008 port_no = u32_to_odp(atoi(argv[3]));
3009 if (!port_no || port_no == ODPP_NONE) {
3010 unixctl_command_reply_error(conn, "bad port number");
3013 if (dp_netdev_lookup_port(dp, port_no)) {
3014 unixctl_command_reply_error(conn, "port number already in use");
3018 /* Remove old port. */
3019 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
3020 ovsrcu_postpone(free, old_port);
3022 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3023 new_port = xmemdup(old_port, sizeof *old_port);
3024 new_port->port_no = port_no;
3025 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
3027 seq_change(dp->port_seq);
3028 unixctl_command_reply(conn, NULL);
3031 ovs_mutex_unlock(&dp->port_mutex);
3032 dp_netdev_unref(dp);
3036 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
3037 const char *argv[], void *aux OVS_UNUSED)
3039 struct dp_netdev_port *port;
3040 struct dp_netdev *dp;
3042 ovs_mutex_lock(&dp_netdev_mutex);
3043 dp = shash_find_data(&dp_netdevs, argv[1]);
3044 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
3045 ovs_mutex_unlock(&dp_netdev_mutex);
3046 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
3049 ovs_refcount_ref(&dp->ref_cnt);
3050 ovs_mutex_unlock(&dp_netdev_mutex);
3052 ovs_mutex_lock(&dp->port_mutex);
3053 if (get_port_by_name(dp, argv[2], &port)) {
3054 unixctl_command_reply_error(conn, "unknown port");
3055 } else if (port->port_no == ODPP_LOCAL) {
3056 unixctl_command_reply_error(conn, "can't delete local port");
3058 do_del_port(dp, port);
3059 unixctl_command_reply(conn, NULL);
3061 ovs_mutex_unlock(&dp->port_mutex);
3063 dp_netdev_unref(dp);
3067 dpif_dummy_register__(const char *type)
3069 struct dpif_class *class;
3071 class = xmalloc(sizeof *class);
3072 *class = dpif_netdev_class;
3073 class->type = xstrdup(type);
3074 dp_register_provider(class);
3078 dpif_dummy_register(bool override)
3085 dp_enumerate_types(&types);
3086 SSET_FOR_EACH (type, &types) {
3087 if (!dp_unregister_provider(type)) {
3088 dpif_dummy_register__(type);
3091 sset_destroy(&types);
3094 dpif_dummy_register__("dummy");
3096 unixctl_command_register("dpif-dummy/change-port-number",
3097 "dp port new-number",
3098 3, 3, dpif_dummy_change_port_number, NULL);
3099 unixctl_command_register("dpif-dummy/delete-port", "dp port",
3100 2, 2, dpif_dummy_delete_port, NULL);