2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2016 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"
25 #include <netinet/in.h>
29 #include <sys/ioctl.h>
30 #include <sys/socket.h>
38 #include "dp-packet.h"
40 #include "dpif-provider.h"
42 #include "openvswitch/dynamic-string.h"
43 #include "fat-rwlock.h"
47 #include "openvswitch/list.h"
50 #include "netdev-dpdk.h"
51 #include "netdev-vport.h"
53 #include "odp-execute.h"
55 #include "ofp-print.h"
56 #include "openvswitch/ofpbuf.h"
60 #include "poll-loop.h"
67 #include "tnl-neigh-cache.h"
68 #include "tnl-ports.h"
72 #include "openvswitch/vlog.h"
74 VLOG_DEFINE_THIS_MODULE(dpif_netdev
);
76 #define FLOW_DUMP_MAX_BATCH 50
77 /* Use per thread recirc_depth to prevent recirculation loop. */
78 #define MAX_RECIRC_DEPTH 5
79 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth
, 0)
81 /* Configuration parameters. */
82 enum { MAX_FLOWS
= 65536 }; /* Maximum number of flows in flow table. */
84 /* Protects against changes to 'dp_netdevs'. */
85 static struct ovs_mutex dp_netdev_mutex
= OVS_MUTEX_INITIALIZER
;
87 /* Contains all 'struct dp_netdev's. */
88 static struct shash dp_netdevs
OVS_GUARDED_BY(dp_netdev_mutex
)
89 = SHASH_INITIALIZER(&dp_netdevs
);
91 static struct vlog_rate_limit upcall_rl
= VLOG_RATE_LIMIT_INIT(600, 600);
93 static struct odp_support dp_netdev_support
= {
94 .max_mpls_depth
= SIZE_MAX
,
98 /* Stores a miniflow with inline values */
100 struct netdev_flow_key
{
101 uint32_t hash
; /* Hash function differs for different users. */
102 uint32_t len
; /* Length of the following miniflow (incl. map). */
104 uint64_t buf
[FLOW_MAX_PACKET_U64S
];
107 /* Exact match cache for frequently used flows
109 * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
110 * search its entries for a miniflow that matches exactly the miniflow of the
111 * packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
113 * A cache entry holds a reference to its 'dp_netdev_flow'.
115 * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
116 * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
117 * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
118 * value is the index of a cache entry where the miniflow could be.
124 * Each pmd_thread has its own private exact match cache.
125 * If dp_netdev_input is not called from a pmd thread, a mutex is used.
128 #define EM_FLOW_HASH_SHIFT 13
129 #define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
130 #define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
131 #define EM_FLOW_HASH_SEGS 2
134 struct dp_netdev_flow
*flow
;
135 struct netdev_flow_key key
; /* key.hash used for emc hash value. */
139 struct emc_entry entries
[EM_FLOW_HASH_ENTRIES
];
140 int sweep_idx
; /* For emc_cache_slow_sweep(). */
143 /* Iterate in the exact match cache through every entry that might contain a
144 * miniflow with hash 'HASH'. */
145 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
146 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
147 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
148 i__ < EM_FLOW_HASH_SEGS; \
149 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
151 /* Simple non-wildcarding single-priority classifier. */
154 struct cmap subtables_map
;
155 struct pvector subtables
;
158 /* A rule to be inserted to the classifier. */
160 struct cmap_node cmap_node
; /* Within struct dpcls_subtable 'rules'. */
161 struct netdev_flow_key
*mask
; /* Subtable's mask. */
162 struct netdev_flow_key flow
; /* Matching key. */
163 /* 'flow' must be the last field, additional space is allocated here. */
166 static void dpcls_init(struct dpcls
*);
167 static void dpcls_destroy(struct dpcls
*);
168 static void dpcls_insert(struct dpcls
*, struct dpcls_rule
*,
169 const struct netdev_flow_key
*mask
);
170 static void dpcls_remove(struct dpcls
*, struct dpcls_rule
*);
171 static bool dpcls_lookup(const struct dpcls
*cls
,
172 const struct netdev_flow_key keys
[],
173 struct dpcls_rule
**rules
, size_t cnt
);
175 /* Datapath based on the network device interface from netdev.h.
181 * Some members, marked 'const', are immutable. Accessing other members
182 * requires synchronization, as noted in more detail below.
184 * Acquisition order is, from outermost to innermost:
186 * dp_netdev_mutex (global)
190 const struct dpif_class
*const class;
191 const char *const name
;
193 struct ovs_refcount ref_cnt
;
194 atomic_flag destroyed
;
198 * Protected by RCU. Take the mutex to add or remove ports. */
199 struct ovs_mutex port_mutex
;
201 struct seq
*port_seq
; /* Incremented whenever a port changes. */
203 /* Protects access to ofproto-dpif-upcall interface during revalidator
204 * thread synchronization. */
205 struct fat_rwlock upcall_rwlock
;
206 upcall_callback
*upcall_cb
; /* Callback function for executing upcalls. */
209 /* Callback function for notifying the purging of dp flows (during
210 * reseting pmd deletion). */
211 dp_purge_callback
*dp_purge_cb
;
214 /* Stores all 'struct dp_netdev_pmd_thread's. */
215 struct cmap poll_threads
;
217 /* Protects the access of the 'struct dp_netdev_pmd_thread'
218 * instance for non-pmd thread. */
219 struct ovs_mutex non_pmd_mutex
;
221 /* Each pmd thread will store its pointer to
222 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
223 ovsthread_key_t per_pmd_key
;
225 /* Cpu mask for pin of pmd threads. */
227 uint64_t last_tnl_conf_seq
;
230 static struct dp_netdev_port
*dp_netdev_lookup_port(const struct dp_netdev
*dp
,
234 DP_STAT_EXACT_HIT
, /* Packets that had an exact match (emc). */
235 DP_STAT_MASKED_HIT
, /* Packets that matched in the flow table. */
236 DP_STAT_MISS
, /* Packets that did not match. */
237 DP_STAT_LOST
, /* Packets not passed up to the client. */
241 enum pmd_cycles_counter_type
{
242 PMD_CYCLES_POLLING
, /* Cycles spent polling NICs. */
243 PMD_CYCLES_PROCESSING
, /* Cycles spent processing packets */
247 /* A port in a netdev-based datapath. */
248 struct dp_netdev_port
{
250 struct netdev
*netdev
;
251 struct cmap_node node
; /* Node in dp_netdev's 'ports'. */
252 struct netdev_saved_flags
*sf
;
253 unsigned n_rxq
; /* Number of elements in 'rxq' */
254 struct netdev_rxq
**rxq
;
255 char *type
; /* Port type as requested by user. */
256 int latest_requested_n_rxq
; /* Latest requested from netdev number
260 /* Contained by struct dp_netdev_flow's 'stats' member. */
261 struct dp_netdev_flow_stats
{
262 atomic_llong used
; /* Last used time, in monotonic msecs. */
263 atomic_ullong packet_count
; /* Number of packets matched. */
264 atomic_ullong byte_count
; /* Number of bytes matched. */
265 atomic_uint16_t tcp_flags
; /* Bitwise-OR of seen tcp_flags values. */
268 /* A flow in 'dp_netdev_pmd_thread's 'flow_table'.
274 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
275 * its pmd thread's classifier. The text below calls this classifier 'cls'.
280 * The thread safety rules described here for "struct dp_netdev_flow" are
281 * motivated by two goals:
283 * - Prevent threads that read members of "struct dp_netdev_flow" from
284 * reading bad data due to changes by some thread concurrently modifying
287 * - Prevent two threads making changes to members of a given "struct
288 * dp_netdev_flow" from interfering with each other.
294 * A flow 'flow' may be accessed without a risk of being freed during an RCU
295 * grace period. Code that needs to hold onto a flow for a while
296 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
298 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
299 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
302 * Some members, marked 'const', are immutable. Accessing other members
303 * requires synchronization, as noted in more detail below.
305 struct dp_netdev_flow
{
306 const struct flow flow
; /* Unmasked flow that created this entry. */
307 /* Hash table index by unmasked flow. */
308 const struct cmap_node node
; /* In owning dp_netdev_pmd_thread's */
310 const ovs_u128 ufid
; /* Unique flow identifier. */
311 const unsigned pmd_id
; /* The 'core_id' of pmd thread owning this */
314 /* Number of references.
315 * The classifier owns one reference.
316 * Any thread trying to keep a rule from being freed should hold its own
318 struct ovs_refcount ref_cnt
;
323 struct dp_netdev_flow_stats stats
;
326 OVSRCU_TYPE(struct dp_netdev_actions
*) actions
;
328 /* While processing a group of input packets, the datapath uses the next
329 * member to store a pointer to the output batch for the flow. It is
330 * reset after the batch has been sent out (See dp_netdev_queue_batches(),
331 * packet_batch_init() and packet_batch_execute()). */
332 struct packet_batch
*batch
;
334 /* Packet classification. */
335 struct dpcls_rule cr
; /* In owning dp_netdev's 'cls'. */
336 /* 'cr' must be the last member. */
339 static void dp_netdev_flow_unref(struct dp_netdev_flow
*);
340 static bool dp_netdev_flow_ref(struct dp_netdev_flow
*);
341 static int dpif_netdev_flow_from_nlattrs(const struct nlattr
*, uint32_t,
344 /* A set of datapath actions within a "struct dp_netdev_flow".
350 * A struct dp_netdev_actions 'actions' is protected with RCU. */
351 struct dp_netdev_actions
{
352 /* These members are immutable: they do not change during the struct's
354 unsigned int size
; /* Size of 'actions', in bytes. */
355 struct nlattr actions
[]; /* Sequence of OVS_ACTION_ATTR_* attributes. */
358 struct dp_netdev_actions
*dp_netdev_actions_create(const struct nlattr
*,
360 struct dp_netdev_actions
*dp_netdev_flow_get_actions(
361 const struct dp_netdev_flow
*);
362 static void dp_netdev_actions_free(struct dp_netdev_actions
*);
364 /* Contained by struct dp_netdev_pmd_thread's 'stats' member. */
365 struct dp_netdev_pmd_stats
{
366 /* Indexed by DP_STAT_*. */
367 atomic_ullong n
[DP_N_STATS
];
370 /* Contained by struct dp_netdev_pmd_thread's 'cycle' member. */
371 struct dp_netdev_pmd_cycles
{
372 /* Indexed by PMD_CYCLES_*. */
373 atomic_ullong n
[PMD_N_CYCLES
];
376 /* Contained by struct dp_netdev_pmd_thread's 'poll_list' member. */
378 struct dp_netdev_port
*port
;
379 struct netdev_rxq
*rx
;
380 struct ovs_list node
;
383 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
384 * the performance overhead of interrupt processing. Therefore netdev can
385 * not implement rx-wait for these devices. dpif-netdev needs to poll
386 * these device to check for recv buffer. pmd-thread does polling for
387 * devices assigned to itself.
389 * DPDK used PMD for accessing NIC.
391 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
392 * I/O of all non-pmd threads. There will be no actual thread created
395 * Each struct has its own flow table and classifier. Packets received
396 * from managed ports are looked up in the corresponding pmd thread's
397 * flow table, and are executed with the found actions.
399 struct dp_netdev_pmd_thread
{
400 struct dp_netdev
*dp
;
401 struct ovs_refcount ref_cnt
; /* Every reference must be refcount'ed. */
402 struct cmap_node node
; /* In 'dp->poll_threads'. */
404 pthread_cond_t cond
; /* For synchronizing pmd thread reload. */
405 struct ovs_mutex cond_mutex
; /* Mutex for condition variable. */
407 /* Per thread exact-match cache. Note, the instance for cpu core
408 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
409 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
410 * instances will only be accessed by its own pmd thread. */
411 struct emc_cache flow_cache
;
413 /* Classifier and Flow-Table.
415 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
416 * changes to 'cls' must be made while still holding the 'flow_mutex'.
418 struct ovs_mutex flow_mutex
;
420 struct cmap flow_table OVS_GUARDED
; /* Flow table. */
423 struct dp_netdev_pmd_stats stats
;
425 /* Cycles counters */
426 struct dp_netdev_pmd_cycles cycles
;
428 /* Used to count cicles. See 'cycles_counter_end()' */
429 unsigned long long last_cycles
;
431 struct latch exit_latch
; /* For terminating the pmd thread. */
432 atomic_uint change_seq
; /* For reloading pmd ports. */
434 int index
; /* Idx of this pmd thread among pmd*/
435 /* threads on same numa node. */
436 unsigned core_id
; /* CPU core id of this pmd thread. */
437 int numa_id
; /* numa node id of this pmd thread. */
438 atomic_int tx_qid
; /* Queue id used by this pmd thread to
439 * send packets on all netdevs */
441 struct ovs_mutex poll_mutex
; /* Mutex for poll_list. */
442 /* List of rx queues to poll. */
443 struct ovs_list poll_list OVS_GUARDED
;
444 int poll_cnt
; /* Number of elemints in poll_list. */
446 /* Only a pmd thread can write on its own 'cycles' and 'stats'.
447 * The main thread keeps 'stats_zero' and 'cycles_zero' as base
448 * values and subtracts them from 'stats' and 'cycles' before
449 * reporting to the user */
450 unsigned long long stats_zero
[DP_N_STATS
];
451 uint64_t cycles_zero
[PMD_N_CYCLES
];
454 #define PMD_INITIAL_SEQ 1
456 /* Interface to netdev-based datapath. */
459 struct dp_netdev
*dp
;
460 uint64_t last_port_seq
;
463 static int get_port_by_number(struct dp_netdev
*dp
, odp_port_t port_no
,
464 struct dp_netdev_port
**portp
);
465 static int get_port_by_name(struct dp_netdev
*dp
, const char *devname
,
466 struct dp_netdev_port
**portp
);
467 static void dp_netdev_free(struct dp_netdev
*)
468 OVS_REQUIRES(dp_netdev_mutex
);
469 static int do_add_port(struct dp_netdev
*dp
, const char *devname
,
470 const char *type
, odp_port_t port_no
)
471 OVS_REQUIRES(dp
->port_mutex
);
472 static void do_del_port(struct dp_netdev
*dp
, struct dp_netdev_port
*)
473 OVS_REQUIRES(dp
->port_mutex
);
474 static int dpif_netdev_open(const struct dpif_class
*, const char *name
,
475 bool create
, struct dpif
**);
476 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread
*pmd
,
477 struct dp_packet
**, int c
,
479 const struct nlattr
*actions
,
481 static void dp_netdev_input(struct dp_netdev_pmd_thread
*,
482 struct dp_packet
**, int cnt
, odp_port_t port_no
);
483 static void dp_netdev_recirculate(struct dp_netdev_pmd_thread
*,
484 struct dp_packet
**, int cnt
);
486 static void dp_netdev_disable_upcall(struct dp_netdev
*);
487 static void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread
*pmd
);
488 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread
*pmd
,
489 struct dp_netdev
*dp
, int index
,
490 unsigned core_id
, int numa_id
);
491 static void dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread
*pmd
);
492 static void dp_netdev_set_nonpmd(struct dp_netdev
*dp
);
493 static struct dp_netdev_pmd_thread
*dp_netdev_get_pmd(struct dp_netdev
*dp
,
495 static struct dp_netdev_pmd_thread
*
496 dp_netdev_pmd_get_next(struct dp_netdev
*dp
, struct cmap_position
*pos
);
497 static void dp_netdev_destroy_all_pmds(struct dp_netdev
*dp
);
498 static void dp_netdev_del_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
);
499 static void dp_netdev_set_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
);
500 static void dp_netdev_pmd_clear_poll_list(struct dp_netdev_pmd_thread
*pmd
);
501 static void dp_netdev_del_port_from_pmd(struct dp_netdev_port
*port
,
502 struct dp_netdev_pmd_thread
*pmd
);
503 static void dp_netdev_del_port_from_all_pmds(struct dp_netdev
*dp
,
504 struct dp_netdev_port
*port
);
506 dp_netdev_add_port_to_pmds(struct dp_netdev
*dp
, struct dp_netdev_port
*port
);
508 dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread
*pmd
,
509 struct dp_netdev_port
*port
, struct netdev_rxq
*rx
);
510 static struct dp_netdev_pmd_thread
*
511 dp_netdev_less_loaded_pmd_on_numa(struct dp_netdev
*dp
, int numa_id
);
512 static void dp_netdev_reset_pmd_threads(struct dp_netdev
*dp
);
513 static bool dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread
*pmd
);
514 static void dp_netdev_pmd_unref(struct dp_netdev_pmd_thread
*pmd
);
515 static void dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread
*pmd
);
517 static inline bool emc_entry_alive(struct emc_entry
*ce
);
518 static void emc_clear_entry(struct emc_entry
*ce
);
521 emc_cache_init(struct emc_cache
*flow_cache
)
525 flow_cache
->sweep_idx
= 0;
526 for (i
= 0; i
< ARRAY_SIZE(flow_cache
->entries
); i
++) {
527 flow_cache
->entries
[i
].flow
= NULL
;
528 flow_cache
->entries
[i
].key
.hash
= 0;
529 flow_cache
->entries
[i
].key
.len
= sizeof(struct miniflow
);
530 flowmap_init(&flow_cache
->entries
[i
].key
.mf
.map
);
535 emc_cache_uninit(struct emc_cache
*flow_cache
)
539 for (i
= 0; i
< ARRAY_SIZE(flow_cache
->entries
); i
++) {
540 emc_clear_entry(&flow_cache
->entries
[i
]);
544 /* Check and clear dead flow references slowly (one entry at each
547 emc_cache_slow_sweep(struct emc_cache
*flow_cache
)
549 struct emc_entry
*entry
= &flow_cache
->entries
[flow_cache
->sweep_idx
];
551 if (!emc_entry_alive(entry
)) {
552 emc_clear_entry(entry
);
554 flow_cache
->sweep_idx
= (flow_cache
->sweep_idx
+ 1) & EM_FLOW_HASH_MASK
;
557 /* Returns true if 'dpif' is a netdev or dummy dpif, false otherwise. */
559 dpif_is_netdev(const struct dpif
*dpif
)
561 return dpif
->dpif_class
->open
== dpif_netdev_open
;
564 static struct dpif_netdev
*
565 dpif_netdev_cast(const struct dpif
*dpif
)
567 ovs_assert(dpif_is_netdev(dpif
));
568 return CONTAINER_OF(dpif
, struct dpif_netdev
, dpif
);
571 static struct dp_netdev
*
572 get_dp_netdev(const struct dpif
*dpif
)
574 return dpif_netdev_cast(dpif
)->dp
;
578 PMD_INFO_SHOW_STATS
, /* Show how cpu cycles are spent. */
579 PMD_INFO_CLEAR_STATS
, /* Set the cycles count to 0. */
580 PMD_INFO_SHOW_RXQ
/* Show poll-lists of pmd threads. */
584 pmd_info_show_stats(struct ds
*reply
,
585 struct dp_netdev_pmd_thread
*pmd
,
586 unsigned long long stats
[DP_N_STATS
],
587 uint64_t cycles
[PMD_N_CYCLES
])
589 unsigned long long total_packets
= 0;
590 uint64_t total_cycles
= 0;
593 /* These loops subtracts reference values ('*_zero') from the counters.
594 * Since loads and stores are relaxed, it might be possible for a '*_zero'
595 * value to be more recent than the current value we're reading from the
596 * counter. This is not a big problem, since these numbers are not
597 * supposed to be too accurate, but we should at least make sure that
598 * the result is not negative. */
599 for (i
= 0; i
< DP_N_STATS
; i
++) {
600 if (stats
[i
] > pmd
->stats_zero
[i
]) {
601 stats
[i
] -= pmd
->stats_zero
[i
];
606 if (i
!= DP_STAT_LOST
) {
607 /* Lost packets are already included in DP_STAT_MISS */
608 total_packets
+= stats
[i
];
612 for (i
= 0; i
< PMD_N_CYCLES
; i
++) {
613 if (cycles
[i
] > pmd
->cycles_zero
[i
]) {
614 cycles
[i
] -= pmd
->cycles_zero
[i
];
619 total_cycles
+= cycles
[i
];
622 ds_put_cstr(reply
, (pmd
->core_id
== NON_PMD_CORE_ID
)
623 ? "main thread" : "pmd thread");
625 if (pmd
->numa_id
!= OVS_NUMA_UNSPEC
) {
626 ds_put_format(reply
, " numa_id %d", pmd
->numa_id
);
628 if (pmd
->core_id
!= OVS_CORE_UNSPEC
&& pmd
->core_id
!= NON_PMD_CORE_ID
) {
629 ds_put_format(reply
, " core_id %u", pmd
->core_id
);
631 ds_put_cstr(reply
, ":\n");
634 "\temc hits:%llu\n\tmegaflow hits:%llu\n"
635 "\tmiss:%llu\n\tlost:%llu\n",
636 stats
[DP_STAT_EXACT_HIT
], stats
[DP_STAT_MASKED_HIT
],
637 stats
[DP_STAT_MISS
], stats
[DP_STAT_LOST
]);
639 if (total_cycles
== 0) {
644 "\tpolling cycles:%"PRIu64
" (%.02f%%)\n"
645 "\tprocessing cycles:%"PRIu64
" (%.02f%%)\n",
646 cycles
[PMD_CYCLES_POLLING
],
647 cycles
[PMD_CYCLES_POLLING
] / (double)total_cycles
* 100,
648 cycles
[PMD_CYCLES_PROCESSING
],
649 cycles
[PMD_CYCLES_PROCESSING
] / (double)total_cycles
* 100);
651 if (total_packets
== 0) {
656 "\tavg cycles per packet: %.02f (%"PRIu64
"/%llu)\n",
657 total_cycles
/ (double)total_packets
,
658 total_cycles
, total_packets
);
661 "\tavg processing cycles per packet: "
662 "%.02f (%"PRIu64
"/%llu)\n",
663 cycles
[PMD_CYCLES_PROCESSING
] / (double)total_packets
,
664 cycles
[PMD_CYCLES_PROCESSING
], total_packets
);
668 pmd_info_clear_stats(struct ds
*reply OVS_UNUSED
,
669 struct dp_netdev_pmd_thread
*pmd
,
670 unsigned long long stats
[DP_N_STATS
],
671 uint64_t cycles
[PMD_N_CYCLES
])
675 /* We cannot write 'stats' and 'cycles' (because they're written by other
676 * threads) and we shouldn't change 'stats' (because they're used to count
677 * datapath stats, which must not be cleared here). Instead, we save the
678 * current values and subtract them from the values to be displayed in the
680 for (i
= 0; i
< DP_N_STATS
; i
++) {
681 pmd
->stats_zero
[i
] = stats
[i
];
683 for (i
= 0; i
< PMD_N_CYCLES
; i
++) {
684 pmd
->cycles_zero
[i
] = cycles
[i
];
689 pmd_info_show_rxq(struct ds
*reply
, struct dp_netdev_pmd_thread
*pmd
)
691 if (pmd
->core_id
!= NON_PMD_CORE_ID
) {
692 struct rxq_poll
*poll
;
693 const char *prev_name
= NULL
;
695 ds_put_format(reply
, "pmd thread numa_id %d core_id %u:\n",
696 pmd
->numa_id
, pmd
->core_id
);
698 ovs_mutex_lock(&pmd
->poll_mutex
);
699 LIST_FOR_EACH (poll
, node
, &pmd
->poll_list
) {
700 const char *name
= netdev_get_name(poll
->port
->netdev
);
702 if (!prev_name
|| strcmp(name
, prev_name
)) {
704 ds_put_cstr(reply
, "\n");
706 ds_put_format(reply
, "\tport: %s\tqueue-id:",
707 netdev_get_name(poll
->port
->netdev
));
709 ds_put_format(reply
, " %d", netdev_rxq_get_queue_id(poll
->rx
));
712 ovs_mutex_unlock(&pmd
->poll_mutex
);
713 ds_put_cstr(reply
, "\n");
718 dpif_netdev_pmd_info(struct unixctl_conn
*conn
, int argc
, const char *argv
[],
721 struct ds reply
= DS_EMPTY_INITIALIZER
;
722 struct dp_netdev_pmd_thread
*pmd
;
723 struct dp_netdev
*dp
= NULL
;
724 enum pmd_info_type type
= *(enum pmd_info_type
*) aux
;
726 ovs_mutex_lock(&dp_netdev_mutex
);
729 dp
= shash_find_data(&dp_netdevs
, argv
[1]);
730 } else if (shash_count(&dp_netdevs
) == 1) {
731 /* There's only one datapath */
732 dp
= shash_first(&dp_netdevs
)->data
;
736 ovs_mutex_unlock(&dp_netdev_mutex
);
737 unixctl_command_reply_error(conn
,
738 "please specify an existing datapath");
742 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
743 if (type
== PMD_INFO_SHOW_RXQ
) {
744 pmd_info_show_rxq(&reply
, pmd
);
746 unsigned long long stats
[DP_N_STATS
];
747 uint64_t cycles
[PMD_N_CYCLES
];
750 /* Read current stats and cycle counters */
751 for (i
= 0; i
< ARRAY_SIZE(stats
); i
++) {
752 atomic_read_relaxed(&pmd
->stats
.n
[i
], &stats
[i
]);
754 for (i
= 0; i
< ARRAY_SIZE(cycles
); i
++) {
755 atomic_read_relaxed(&pmd
->cycles
.n
[i
], &cycles
[i
]);
758 if (type
== PMD_INFO_CLEAR_STATS
) {
759 pmd_info_clear_stats(&reply
, pmd
, stats
, cycles
);
760 } else if (type
== PMD_INFO_SHOW_STATS
) {
761 pmd_info_show_stats(&reply
, pmd
, stats
, cycles
);
766 ovs_mutex_unlock(&dp_netdev_mutex
);
768 unixctl_command_reply(conn
, ds_cstr(&reply
));
773 dpif_netdev_init(void)
775 static enum pmd_info_type show_aux
= PMD_INFO_SHOW_STATS
,
776 clear_aux
= PMD_INFO_CLEAR_STATS
,
777 poll_aux
= PMD_INFO_SHOW_RXQ
;
779 unixctl_command_register("dpif-netdev/pmd-stats-show", "[dp]",
780 0, 1, dpif_netdev_pmd_info
,
782 unixctl_command_register("dpif-netdev/pmd-stats-clear", "[dp]",
783 0, 1, dpif_netdev_pmd_info
,
785 unixctl_command_register("dpif-netdev/pmd-rxq-show", "[dp]",
786 0, 1, dpif_netdev_pmd_info
,
792 dpif_netdev_enumerate(struct sset
*all_dps
,
793 const struct dpif_class
*dpif_class
)
795 struct shash_node
*node
;
797 ovs_mutex_lock(&dp_netdev_mutex
);
798 SHASH_FOR_EACH(node
, &dp_netdevs
) {
799 struct dp_netdev
*dp
= node
->data
;
800 if (dpif_class
!= dp
->class) {
801 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
802 * If the class doesn't match, skip this dpif. */
805 sset_add(all_dps
, node
->name
);
807 ovs_mutex_unlock(&dp_netdev_mutex
);
813 dpif_netdev_class_is_dummy(const struct dpif_class
*class)
815 return class != &dpif_netdev_class
;
819 dpif_netdev_port_open_type(const struct dpif_class
*class, const char *type
)
821 return strcmp(type
, "internal") ? type
822 : dpif_netdev_class_is_dummy(class) ? "dummy"
827 create_dpif_netdev(struct dp_netdev
*dp
)
829 uint16_t netflow_id
= hash_string(dp
->name
, 0);
830 struct dpif_netdev
*dpif
;
832 ovs_refcount_ref(&dp
->ref_cnt
);
834 dpif
= xmalloc(sizeof *dpif
);
835 dpif_init(&dpif
->dpif
, dp
->class, dp
->name
, netflow_id
>> 8, netflow_id
);
837 dpif
->last_port_seq
= seq_read(dp
->port_seq
);
842 /* Choose an unused, non-zero port number and return it on success.
843 * Return ODPP_NONE on failure. */
845 choose_port(struct dp_netdev
*dp
, const char *name
)
846 OVS_REQUIRES(dp
->port_mutex
)
850 if (dp
->class != &dpif_netdev_class
) {
854 /* If the port name begins with "br", start the number search at
855 * 100 to make writing tests easier. */
856 if (!strncmp(name
, "br", 2)) {
860 /* If the port name contains a number, try to assign that port number.
861 * This can make writing unit tests easier because port numbers are
863 for (p
= name
; *p
!= '\0'; p
++) {
864 if (isdigit((unsigned char) *p
)) {
865 port_no
= start_no
+ strtol(p
, NULL
, 10);
866 if (port_no
> 0 && port_no
!= odp_to_u32(ODPP_NONE
)
867 && !dp_netdev_lookup_port(dp
, u32_to_odp(port_no
))) {
868 return u32_to_odp(port_no
);
875 for (port_no
= 1; port_no
<= UINT16_MAX
; port_no
++) {
876 if (!dp_netdev_lookup_port(dp
, u32_to_odp(port_no
))) {
877 return u32_to_odp(port_no
);
885 create_dp_netdev(const char *name
, const struct dpif_class
*class,
886 struct dp_netdev
**dpp
)
887 OVS_REQUIRES(dp_netdev_mutex
)
889 struct dp_netdev
*dp
;
892 dp
= xzalloc(sizeof *dp
);
893 shash_add(&dp_netdevs
, name
, dp
);
895 *CONST_CAST(const struct dpif_class
**, &dp
->class) = class;
896 *CONST_CAST(const char **, &dp
->name
) = xstrdup(name
);
897 ovs_refcount_init(&dp
->ref_cnt
);
898 atomic_flag_clear(&dp
->destroyed
);
900 ovs_mutex_init(&dp
->port_mutex
);
901 cmap_init(&dp
->ports
);
902 dp
->port_seq
= seq_create();
903 fat_rwlock_init(&dp
->upcall_rwlock
);
905 /* Disable upcalls by default. */
906 dp_netdev_disable_upcall(dp
);
907 dp
->upcall_aux
= NULL
;
908 dp
->upcall_cb
= NULL
;
910 cmap_init(&dp
->poll_threads
);
911 ovs_mutex_init_recursive(&dp
->non_pmd_mutex
);
912 ovsthread_key_create(&dp
->per_pmd_key
, NULL
);
914 dp_netdev_set_nonpmd(dp
);
916 ovs_mutex_lock(&dp
->port_mutex
);
917 error
= do_add_port(dp
, name
, "internal", ODPP_LOCAL
);
918 ovs_mutex_unlock(&dp
->port_mutex
);
924 dp
->last_tnl_conf_seq
= seq_read(tnl_conf_seq
);
930 dpif_netdev_open(const struct dpif_class
*class, const char *name
,
931 bool create
, struct dpif
**dpifp
)
933 struct dp_netdev
*dp
;
936 ovs_mutex_lock(&dp_netdev_mutex
);
937 dp
= shash_find_data(&dp_netdevs
, name
);
939 error
= create
? create_dp_netdev(name
, class, &dp
) : ENODEV
;
941 error
= (dp
->class != class ? EINVAL
946 *dpifp
= create_dpif_netdev(dp
);
949 ovs_mutex_unlock(&dp_netdev_mutex
);
955 dp_netdev_destroy_upcall_lock(struct dp_netdev
*dp
)
956 OVS_NO_THREAD_SAFETY_ANALYSIS
958 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
959 ovs_assert(fat_rwlock_tryrdlock(&dp
->upcall_rwlock
));
961 /* Before freeing a lock we should release it */
962 fat_rwlock_unlock(&dp
->upcall_rwlock
);
963 fat_rwlock_destroy(&dp
->upcall_rwlock
);
966 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
967 * through the 'dp_netdevs' shash while freeing 'dp'. */
969 dp_netdev_free(struct dp_netdev
*dp
)
970 OVS_REQUIRES(dp_netdev_mutex
)
972 struct dp_netdev_port
*port
;
974 shash_find_and_delete(&dp_netdevs
, dp
->name
);
976 dp_netdev_destroy_all_pmds(dp
);
977 ovs_mutex_destroy(&dp
->non_pmd_mutex
);
978 ovsthread_key_delete(dp
->per_pmd_key
);
980 ovs_mutex_lock(&dp
->port_mutex
);
981 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
982 /* PMD threads are destroyed here. do_del_port() cannot quiesce */
983 do_del_port(dp
, port
);
985 ovs_mutex_unlock(&dp
->port_mutex
);
986 cmap_destroy(&dp
->poll_threads
);
988 seq_destroy(dp
->port_seq
);
989 cmap_destroy(&dp
->ports
);
991 /* Upcalls must be disabled at this point */
992 dp_netdev_destroy_upcall_lock(dp
);
995 free(CONST_CAST(char *, dp
->name
));
1000 dp_netdev_unref(struct dp_netdev
*dp
)
1003 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
1004 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
1005 ovs_mutex_lock(&dp_netdev_mutex
);
1006 if (ovs_refcount_unref_relaxed(&dp
->ref_cnt
) == 1) {
1009 ovs_mutex_unlock(&dp_netdev_mutex
);
1014 dpif_netdev_close(struct dpif
*dpif
)
1016 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1018 dp_netdev_unref(dp
);
1023 dpif_netdev_destroy(struct dpif
*dpif
)
1025 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1027 if (!atomic_flag_test_and_set(&dp
->destroyed
)) {
1028 if (ovs_refcount_unref_relaxed(&dp
->ref_cnt
) == 1) {
1029 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
1037 /* Add 'n' to the atomic variable 'var' non-atomically and using relaxed
1038 * load/store semantics. While the increment is not atomic, the load and
1039 * store operations are, making it impossible to read inconsistent values.
1041 * This is used to update thread local stats counters. */
1043 non_atomic_ullong_add(atomic_ullong
*var
, unsigned long long n
)
1045 unsigned long long tmp
;
1047 atomic_read_relaxed(var
, &tmp
);
1049 atomic_store_relaxed(var
, tmp
);
1053 dpif_netdev_get_stats(const struct dpif
*dpif
, struct dpif_dp_stats
*stats
)
1055 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1056 struct dp_netdev_pmd_thread
*pmd
;
1058 stats
->n_flows
= stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
1059 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1060 unsigned long long n
;
1061 stats
->n_flows
+= cmap_count(&pmd
->flow_table
);
1063 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_MASKED_HIT
], &n
);
1065 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_EXACT_HIT
], &n
);
1067 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_MISS
], &n
);
1068 stats
->n_missed
+= n
;
1069 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_LOST
], &n
);
1072 stats
->n_masks
= UINT32_MAX
;
1073 stats
->n_mask_hit
= UINT64_MAX
;
1079 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread
*pmd
)
1083 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
1087 ovs_mutex_lock(&pmd
->cond_mutex
);
1088 atomic_add_relaxed(&pmd
->change_seq
, 1, &old_seq
);
1089 ovs_mutex_cond_wait(&pmd
->cond
, &pmd
->cond_mutex
);
1090 ovs_mutex_unlock(&pmd
->cond_mutex
);
1094 hash_port_no(odp_port_t port_no
)
1096 return hash_int(odp_to_u32(port_no
), 0);
1100 do_add_port(struct dp_netdev
*dp
, const char *devname
, const char *type
,
1102 OVS_REQUIRES(dp
->port_mutex
)
1104 struct netdev_saved_flags
*sf
;
1105 struct dp_netdev_port
*port
;
1106 struct netdev
*netdev
;
1107 enum netdev_flags flags
;
1108 const char *open_type
;
1110 int i
, n_open_rxqs
= 0;
1112 /* Reject devices already in 'dp'. */
1113 if (!get_port_by_name(dp
, devname
, &port
)) {
1118 /* Open and validate network device. */
1119 open_type
= dpif_netdev_port_open_type(dp
->class, type
);
1120 error
= netdev_open(devname
, open_type
, &netdev
);
1124 /* XXX reject non-Ethernet devices */
1126 netdev_get_flags(netdev
, &flags
);
1127 if (flags
& NETDEV_LOOPBACK
) {
1128 VLOG_ERR("%s: cannot add a loopback device", devname
);
1133 if (netdev_is_pmd(netdev
)) {
1134 int n_cores
= ovs_numa_get_n_cores();
1136 if (n_cores
== OVS_CORE_UNSPEC
) {
1137 VLOG_ERR("%s, cannot get cpu core info", devname
);
1141 /* There can only be ovs_numa_get_n_cores() pmd threads,
1142 * so creates a txq for each, and one extra for the non
1144 error
= netdev_set_multiq(netdev
, n_cores
+ 1,
1145 netdev_requested_n_rxq(netdev
));
1146 if (error
&& (error
!= EOPNOTSUPP
)) {
1147 VLOG_ERR("%s, cannot set multiq", devname
);
1151 port
= xzalloc(sizeof *port
);
1152 port
->port_no
= port_no
;
1153 port
->netdev
= netdev
;
1154 port
->n_rxq
= netdev_n_rxq(netdev
);
1155 port
->rxq
= xmalloc(sizeof *port
->rxq
* port
->n_rxq
);
1156 port
->type
= xstrdup(type
);
1157 port
->latest_requested_n_rxq
= netdev_requested_n_rxq(netdev
);
1159 for (i
= 0; i
< port
->n_rxq
; i
++) {
1160 error
= netdev_rxq_open(netdev
, &port
->rxq
[i
], i
);
1162 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
1163 devname
, ovs_strerror(errno
));
1169 error
= netdev_turn_flags_on(netdev
, NETDEV_PROMISC
, &sf
);
1175 cmap_insert(&dp
->ports
, &port
->node
, hash_port_no(port_no
));
1177 if (netdev_is_pmd(netdev
)) {
1178 dp_netdev_add_port_to_pmds(dp
, port
);
1180 seq_change(dp
->port_seq
);
1185 for (i
= 0; i
< n_open_rxqs
; i
++) {
1186 netdev_rxq_close(port
->rxq
[i
]);
1192 netdev_close(netdev
);
1198 dpif_netdev_port_add(struct dpif
*dpif
, struct netdev
*netdev
,
1199 odp_port_t
*port_nop
)
1201 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1202 char namebuf
[NETDEV_VPORT_NAME_BUFSIZE
];
1203 const char *dpif_port
;
1207 ovs_mutex_lock(&dp
->port_mutex
);
1208 dpif_port
= netdev_vport_get_dpif_port(netdev
, namebuf
, sizeof namebuf
);
1209 if (*port_nop
!= ODPP_NONE
) {
1210 port_no
= *port_nop
;
1211 error
= dp_netdev_lookup_port(dp
, *port_nop
) ? EBUSY
: 0;
1213 port_no
= choose_port(dp
, dpif_port
);
1214 error
= port_no
== ODPP_NONE
? EFBIG
: 0;
1217 *port_nop
= port_no
;
1218 error
= do_add_port(dp
, dpif_port
, netdev_get_type(netdev
), port_no
);
1220 ovs_mutex_unlock(&dp
->port_mutex
);
1226 dpif_netdev_port_del(struct dpif
*dpif
, odp_port_t port_no
)
1228 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1231 ovs_mutex_lock(&dp
->port_mutex
);
1232 if (port_no
== ODPP_LOCAL
) {
1235 struct dp_netdev_port
*port
;
1237 error
= get_port_by_number(dp
, port_no
, &port
);
1239 do_del_port(dp
, port
);
1242 ovs_mutex_unlock(&dp
->port_mutex
);
1248 is_valid_port_number(odp_port_t port_no
)
1250 return port_no
!= ODPP_NONE
;
1253 static struct dp_netdev_port
*
1254 dp_netdev_lookup_port(const struct dp_netdev
*dp
, odp_port_t port_no
)
1256 struct dp_netdev_port
*port
;
1258 CMAP_FOR_EACH_WITH_HASH (port
, node
, hash_port_no(port_no
), &dp
->ports
) {
1259 if (port
->port_no
== port_no
) {
1267 get_port_by_number(struct dp_netdev
*dp
,
1268 odp_port_t port_no
, struct dp_netdev_port
**portp
)
1270 if (!is_valid_port_number(port_no
)) {
1274 *portp
= dp_netdev_lookup_port(dp
, port_no
);
1275 return *portp
? 0 : ENOENT
;
1280 port_destroy(struct dp_netdev_port
*port
)
1286 netdev_close(port
->netdev
);
1287 netdev_restore_flags(port
->sf
);
1289 for (unsigned i
= 0; i
< port
->n_rxq
; i
++) {
1290 netdev_rxq_close(port
->rxq
[i
]);
1299 get_port_by_name(struct dp_netdev
*dp
,
1300 const char *devname
, struct dp_netdev_port
**portp
)
1301 OVS_REQUIRES(dp
->port_mutex
)
1303 struct dp_netdev_port
*port
;
1305 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
1306 if (!strcmp(netdev_get_name(port
->netdev
), devname
)) {
1315 get_n_pmd_threads(struct dp_netdev
*dp
)
1317 /* There is one non pmd thread in dp->poll_threads */
1318 return cmap_count(&dp
->poll_threads
) - 1;
1322 get_n_pmd_threads_on_numa(struct dp_netdev
*dp
, int numa_id
)
1324 struct dp_netdev_pmd_thread
*pmd
;
1327 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1328 if (pmd
->numa_id
== numa_id
) {
1336 /* Returns 'true' if there is a port with pmd netdev and the netdev
1337 * is on numa node 'numa_id'. */
1339 has_pmd_port_for_numa(struct dp_netdev
*dp
, int numa_id
)
1341 struct dp_netdev_port
*port
;
1343 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
1344 if (netdev_is_pmd(port
->netdev
)
1345 && netdev_get_numa_id(port
->netdev
) == numa_id
) {
1355 do_del_port(struct dp_netdev
*dp
, struct dp_netdev_port
*port
)
1356 OVS_REQUIRES(dp
->port_mutex
)
1358 cmap_remove(&dp
->ports
, &port
->node
, hash_odp_port(port
->port_no
));
1359 seq_change(dp
->port_seq
);
1360 if (netdev_is_pmd(port
->netdev
)) {
1361 int numa_id
= netdev_get_numa_id(port
->netdev
);
1363 /* PMD threads can not be on invalid numa node. */
1364 ovs_assert(ovs_numa_numa_id_is_valid(numa_id
));
1365 /* If there is no netdev on the numa node, deletes the pmd threads
1366 * for that numa. Else, deletes the queues from polling lists. */
1367 if (!has_pmd_port_for_numa(dp
, numa_id
)) {
1368 dp_netdev_del_pmds_on_numa(dp
, numa_id
);
1370 dp_netdev_del_port_from_all_pmds(dp
, port
);
1378 answer_port_query(const struct dp_netdev_port
*port
,
1379 struct dpif_port
*dpif_port
)
1381 dpif_port
->name
= xstrdup(netdev_get_name(port
->netdev
));
1382 dpif_port
->type
= xstrdup(port
->type
);
1383 dpif_port
->port_no
= port
->port_no
;
1387 dpif_netdev_port_query_by_number(const struct dpif
*dpif
, odp_port_t port_no
,
1388 struct dpif_port
*dpif_port
)
1390 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1391 struct dp_netdev_port
*port
;
1394 error
= get_port_by_number(dp
, port_no
, &port
);
1395 if (!error
&& dpif_port
) {
1396 answer_port_query(port
, dpif_port
);
1403 dpif_netdev_port_query_by_name(const struct dpif
*dpif
, const char *devname
,
1404 struct dpif_port
*dpif_port
)
1406 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1407 struct dp_netdev_port
*port
;
1410 ovs_mutex_lock(&dp
->port_mutex
);
1411 error
= get_port_by_name(dp
, devname
, &port
);
1412 if (!error
&& dpif_port
) {
1413 answer_port_query(port
, dpif_port
);
1415 ovs_mutex_unlock(&dp
->port_mutex
);
1421 dp_netdev_flow_free(struct dp_netdev_flow
*flow
)
1423 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow
));
1427 static void dp_netdev_flow_unref(struct dp_netdev_flow
*flow
)
1429 if (ovs_refcount_unref_relaxed(&flow
->ref_cnt
) == 1) {
1430 ovsrcu_postpone(dp_netdev_flow_free
, flow
);
1435 dp_netdev_flow_hash(const ovs_u128
*ufid
)
1437 return ufid
->u32
[0];
1441 dp_netdev_pmd_remove_flow(struct dp_netdev_pmd_thread
*pmd
,
1442 struct dp_netdev_flow
*flow
)
1443 OVS_REQUIRES(pmd
->flow_mutex
)
1445 struct cmap_node
*node
= CONST_CAST(struct cmap_node
*, &flow
->node
);
1447 dpcls_remove(&pmd
->cls
, &flow
->cr
);
1448 flow
->cr
.mask
= NULL
; /* Accessing rule's mask after this is not safe. */
1450 cmap_remove(&pmd
->flow_table
, node
, dp_netdev_flow_hash(&flow
->ufid
));
1453 dp_netdev_flow_unref(flow
);
1457 dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread
*pmd
)
1459 struct dp_netdev_flow
*netdev_flow
;
1461 ovs_mutex_lock(&pmd
->flow_mutex
);
1462 CMAP_FOR_EACH (netdev_flow
, node
, &pmd
->flow_table
) {
1463 dp_netdev_pmd_remove_flow(pmd
, netdev_flow
);
1465 ovs_mutex_unlock(&pmd
->flow_mutex
);
1469 dpif_netdev_flow_flush(struct dpif
*dpif
)
1471 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1472 struct dp_netdev_pmd_thread
*pmd
;
1474 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1475 dp_netdev_pmd_flow_flush(pmd
);
1481 struct dp_netdev_port_state
{
1482 struct cmap_position position
;
1487 dpif_netdev_port_dump_start(const struct dpif
*dpif OVS_UNUSED
, void **statep
)
1489 *statep
= xzalloc(sizeof(struct dp_netdev_port_state
));
1494 dpif_netdev_port_dump_next(const struct dpif
*dpif
, void *state_
,
1495 struct dpif_port
*dpif_port
)
1497 struct dp_netdev_port_state
*state
= state_
;
1498 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1499 struct cmap_node
*node
;
1502 node
= cmap_next_position(&dp
->ports
, &state
->position
);
1504 struct dp_netdev_port
*port
;
1506 port
= CONTAINER_OF(node
, struct dp_netdev_port
, node
);
1509 state
->name
= xstrdup(netdev_get_name(port
->netdev
));
1510 dpif_port
->name
= state
->name
;
1511 dpif_port
->type
= port
->type
;
1512 dpif_port
->port_no
= port
->port_no
;
1523 dpif_netdev_port_dump_done(const struct dpif
*dpif OVS_UNUSED
, void *state_
)
1525 struct dp_netdev_port_state
*state
= state_
;
1532 dpif_netdev_port_poll(const struct dpif
*dpif_
, char **devnamep OVS_UNUSED
)
1534 struct dpif_netdev
*dpif
= dpif_netdev_cast(dpif_
);
1535 uint64_t new_port_seq
;
1538 new_port_seq
= seq_read(dpif
->dp
->port_seq
);
1539 if (dpif
->last_port_seq
!= new_port_seq
) {
1540 dpif
->last_port_seq
= new_port_seq
;
1550 dpif_netdev_port_poll_wait(const struct dpif
*dpif_
)
1552 struct dpif_netdev
*dpif
= dpif_netdev_cast(dpif_
);
1554 seq_wait(dpif
->dp
->port_seq
, dpif
->last_port_seq
);
1557 static struct dp_netdev_flow
*
1558 dp_netdev_flow_cast(const struct dpcls_rule
*cr
)
1560 return cr
? CONTAINER_OF(cr
, struct dp_netdev_flow
, cr
) : NULL
;
1563 static bool dp_netdev_flow_ref(struct dp_netdev_flow
*flow
)
1565 return ovs_refcount_try_ref_rcu(&flow
->ref_cnt
);
1568 /* netdev_flow_key utilities.
1570 * netdev_flow_key is basically a miniflow. We use these functions
1571 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1572 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1574 * - Since we are dealing exclusively with miniflows created by
1575 * miniflow_extract(), if the map is different the miniflow is different.
1576 * Therefore we can be faster by comparing the map and the miniflow in a
1578 * - These functions can be inlined by the compiler. */
1580 /* Given the number of bits set in miniflow's maps, returns the size of the
1581 * 'netdev_flow_key.mf' */
1582 static inline size_t
1583 netdev_flow_key_size(size_t flow_u64s
)
1585 return sizeof(struct miniflow
) + MINIFLOW_VALUES_SIZE(flow_u64s
);
1589 netdev_flow_key_equal(const struct netdev_flow_key
*a
,
1590 const struct netdev_flow_key
*b
)
1592 /* 'b->len' may be not set yet. */
1593 return a
->hash
== b
->hash
&& !memcmp(&a
->mf
, &b
->mf
, a
->len
);
1596 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1597 * The maps are compared bitwise, so both 'key->mf' and 'mf' must have been
1598 * generated by miniflow_extract. */
1600 netdev_flow_key_equal_mf(const struct netdev_flow_key
*key
,
1601 const struct miniflow
*mf
)
1603 return !memcmp(&key
->mf
, mf
, key
->len
);
1607 netdev_flow_key_clone(struct netdev_flow_key
*dst
,
1608 const struct netdev_flow_key
*src
)
1611 offsetof(struct netdev_flow_key
, mf
) + src
->len
);
1616 netdev_flow_key_from_flow(struct netdev_flow_key
*dst
,
1617 const struct flow
*src
)
1619 struct dp_packet packet
;
1620 uint64_t buf_stub
[512 / 8];
1622 dp_packet_use_stub(&packet
, buf_stub
, sizeof buf_stub
);
1623 pkt_metadata_from_flow(&packet
.md
, src
);
1624 flow_compose(&packet
, src
);
1625 miniflow_extract(&packet
, &dst
->mf
);
1626 dp_packet_uninit(&packet
);
1628 dst
->len
= netdev_flow_key_size(miniflow_n_values(&dst
->mf
));
1629 dst
->hash
= 0; /* Not computed yet. */
1632 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1634 netdev_flow_mask_init(struct netdev_flow_key
*mask
,
1635 const struct match
*match
)
1637 uint64_t *dst
= miniflow_values(&mask
->mf
);
1638 struct flowmap fmap
;
1642 /* Only check masks that make sense for the flow. */
1643 flow_wc_map(&match
->flow
, &fmap
);
1644 flowmap_init(&mask
->mf
.map
);
1646 FLOWMAP_FOR_EACH_INDEX(idx
, fmap
) {
1647 uint64_t mask_u64
= flow_u64_value(&match
->wc
.masks
, idx
);
1650 flowmap_set(&mask
->mf
.map
, idx
, 1);
1652 hash
= hash_add64(hash
, mask_u64
);
1658 FLOWMAP_FOR_EACH_MAP (map
, mask
->mf
.map
) {
1659 hash
= hash_add64(hash
, map
);
1662 size_t n
= dst
- miniflow_get_values(&mask
->mf
);
1664 mask
->hash
= hash_finish(hash
, n
* 8);
1665 mask
->len
= netdev_flow_key_size(n
);
1668 /* Initializes 'dst' as a copy of 'flow' masked with 'mask'. */
1670 netdev_flow_key_init_masked(struct netdev_flow_key
*dst
,
1671 const struct flow
*flow
,
1672 const struct netdev_flow_key
*mask
)
1674 uint64_t *dst_u64
= miniflow_values(&dst
->mf
);
1675 const uint64_t *mask_u64
= miniflow_get_values(&mask
->mf
);
1679 dst
->len
= mask
->len
;
1680 dst
->mf
= mask
->mf
; /* Copy maps. */
1682 FLOW_FOR_EACH_IN_MAPS(value
, flow
, mask
->mf
.map
) {
1683 *dst_u64
= value
& *mask_u64
++;
1684 hash
= hash_add64(hash
, *dst_u64
++);
1686 dst
->hash
= hash_finish(hash
,
1687 (dst_u64
- miniflow_get_values(&dst
->mf
)) * 8);
1690 /* Iterate through netdev_flow_key TNL u64 values specified by 'FLOWMAP'. */
1691 #define NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(VALUE, KEY, FLOWMAP) \
1692 MINIFLOW_FOR_EACH_IN_FLOWMAP(VALUE, &(KEY)->mf, FLOWMAP)
1694 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1696 static inline uint32_t
1697 netdev_flow_key_hash_in_mask(const struct netdev_flow_key
*key
,
1698 const struct netdev_flow_key
*mask
)
1700 const uint64_t *p
= miniflow_get_values(&mask
->mf
);
1704 NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value
, key
, mask
->mf
.map
) {
1705 hash
= hash_add64(hash
, value
& *p
++);
1708 return hash_finish(hash
, (p
- miniflow_get_values(&mask
->mf
)) * 8);
1712 emc_entry_alive(struct emc_entry
*ce
)
1714 return ce
->flow
&& !ce
->flow
->dead
;
1718 emc_clear_entry(struct emc_entry
*ce
)
1721 dp_netdev_flow_unref(ce
->flow
);
1727 emc_change_entry(struct emc_entry
*ce
, struct dp_netdev_flow
*flow
,
1728 const struct netdev_flow_key
*key
)
1730 if (ce
->flow
!= flow
) {
1732 dp_netdev_flow_unref(ce
->flow
);
1735 if (dp_netdev_flow_ref(flow
)) {
1742 netdev_flow_key_clone(&ce
->key
, key
);
1747 emc_insert(struct emc_cache
*cache
, const struct netdev_flow_key
*key
,
1748 struct dp_netdev_flow
*flow
)
1750 struct emc_entry
*to_be_replaced
= NULL
;
1751 struct emc_entry
*current_entry
;
1753 EMC_FOR_EACH_POS_WITH_HASH(cache
, current_entry
, key
->hash
) {
1754 if (netdev_flow_key_equal(¤t_entry
->key
, key
)) {
1755 /* We found the entry with the 'mf' miniflow */
1756 emc_change_entry(current_entry
, flow
, NULL
);
1760 /* Replacement policy: put the flow in an empty (not alive) entry, or
1761 * in the first entry where it can be */
1763 || (emc_entry_alive(to_be_replaced
)
1764 && !emc_entry_alive(current_entry
))
1765 || current_entry
->key
.hash
< to_be_replaced
->key
.hash
) {
1766 to_be_replaced
= current_entry
;
1769 /* We didn't find the miniflow in the cache.
1770 * The 'to_be_replaced' entry is where the new flow will be stored */
1772 emc_change_entry(to_be_replaced
, flow
, key
);
1775 static inline struct dp_netdev_flow
*
1776 emc_lookup(struct emc_cache
*cache
, const struct netdev_flow_key
*key
)
1778 struct emc_entry
*current_entry
;
1780 EMC_FOR_EACH_POS_WITH_HASH(cache
, current_entry
, key
->hash
) {
1781 if (current_entry
->key
.hash
== key
->hash
1782 && emc_entry_alive(current_entry
)
1783 && netdev_flow_key_equal_mf(¤t_entry
->key
, &key
->mf
)) {
1785 /* We found the entry with the 'key->mf' miniflow */
1786 return current_entry
->flow
;
1793 static struct dp_netdev_flow
*
1794 dp_netdev_pmd_lookup_flow(const struct dp_netdev_pmd_thread
*pmd
,
1795 const struct netdev_flow_key
*key
)
1797 struct dp_netdev_flow
*netdev_flow
;
1798 struct dpcls_rule
*rule
;
1800 dpcls_lookup(&pmd
->cls
, key
, &rule
, 1);
1801 netdev_flow
= dp_netdev_flow_cast(rule
);
1806 static struct dp_netdev_flow
*
1807 dp_netdev_pmd_find_flow(const struct dp_netdev_pmd_thread
*pmd
,
1808 const ovs_u128
*ufidp
, const struct nlattr
*key
,
1811 struct dp_netdev_flow
*netdev_flow
;
1815 /* If a UFID is not provided, determine one based on the key. */
1816 if (!ufidp
&& key
&& key_len
1817 && !dpif_netdev_flow_from_nlattrs(key
, key_len
, &flow
)) {
1818 dpif_flow_hash(pmd
->dp
->dpif
, &flow
, sizeof flow
, &ufid
);
1823 CMAP_FOR_EACH_WITH_HASH (netdev_flow
, node
, dp_netdev_flow_hash(ufidp
),
1825 if (ovs_u128_equals(&netdev_flow
->ufid
, ufidp
)) {
1835 get_dpif_flow_stats(const struct dp_netdev_flow
*netdev_flow_
,
1836 struct dpif_flow_stats
*stats
)
1838 struct dp_netdev_flow
*netdev_flow
;
1839 unsigned long long n
;
1843 netdev_flow
= CONST_CAST(struct dp_netdev_flow
*, netdev_flow_
);
1845 atomic_read_relaxed(&netdev_flow
->stats
.packet_count
, &n
);
1846 stats
->n_packets
= n
;
1847 atomic_read_relaxed(&netdev_flow
->stats
.byte_count
, &n
);
1849 atomic_read_relaxed(&netdev_flow
->stats
.used
, &used
);
1851 atomic_read_relaxed(&netdev_flow
->stats
.tcp_flags
, &flags
);
1852 stats
->tcp_flags
= flags
;
1855 /* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
1856 * storing the netlink-formatted key/mask. 'key_buf' may be the same as
1857 * 'mask_buf'. Actions will be returned without copying, by relying on RCU to
1860 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow
*netdev_flow
,
1861 struct ofpbuf
*key_buf
, struct ofpbuf
*mask_buf
,
1862 struct dpif_flow
*flow
, bool terse
)
1865 memset(flow
, 0, sizeof *flow
);
1867 struct flow_wildcards wc
;
1868 struct dp_netdev_actions
*actions
;
1870 struct odp_flow_key_parms odp_parms
= {
1871 .flow
= &netdev_flow
->flow
,
1873 .support
= dp_netdev_support
,
1876 miniflow_expand(&netdev_flow
->cr
.mask
->mf
, &wc
.masks
);
1879 offset
= key_buf
->size
;
1880 flow
->key
= ofpbuf_tail(key_buf
);
1881 odp_parms
.odp_in_port
= netdev_flow
->flow
.in_port
.odp_port
;
1882 odp_flow_key_from_flow(&odp_parms
, key_buf
);
1883 flow
->key_len
= key_buf
->size
- offset
;
1886 offset
= mask_buf
->size
;
1887 flow
->mask
= ofpbuf_tail(mask_buf
);
1888 odp_parms
.odp_in_port
= wc
.masks
.in_port
.odp_port
;
1889 odp_parms
.key_buf
= key_buf
;
1890 odp_flow_key_from_mask(&odp_parms
, mask_buf
);
1891 flow
->mask_len
= mask_buf
->size
- offset
;
1894 actions
= dp_netdev_flow_get_actions(netdev_flow
);
1895 flow
->actions
= actions
->actions
;
1896 flow
->actions_len
= actions
->size
;
1899 flow
->ufid
= netdev_flow
->ufid
;
1900 flow
->ufid_present
= true;
1901 flow
->pmd_id
= netdev_flow
->pmd_id
;
1902 get_dpif_flow_stats(netdev_flow
, &flow
->stats
);
1906 dpif_netdev_mask_from_nlattrs(const struct nlattr
*key
, uint32_t key_len
,
1907 const struct nlattr
*mask_key
,
1908 uint32_t mask_key_len
, const struct flow
*flow
,
1909 struct flow_wildcards
*wc
)
1911 enum odp_key_fitness fitness
;
1913 fitness
= odp_flow_key_to_mask_udpif(mask_key
, mask_key_len
, key
,
1916 /* This should not happen: it indicates that
1917 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1918 * disagree on the acceptable form of a mask. Log the problem
1919 * as an error, with enough details to enable debugging. */
1920 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1922 if (!VLOG_DROP_ERR(&rl
)) {
1926 odp_flow_format(key
, key_len
, mask_key
, mask_key_len
, NULL
, &s
,
1928 VLOG_ERR("internal error parsing flow mask %s (%s)",
1929 ds_cstr(&s
), odp_key_fitness_to_string(fitness
));
1940 dpif_netdev_flow_from_nlattrs(const struct nlattr
*key
, uint32_t key_len
,
1945 if (odp_flow_key_to_flow_udpif(key
, key_len
, flow
)) {
1946 /* This should not happen: it indicates that odp_flow_key_from_flow()
1947 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1948 * flow. Log the problem as an error, with enough details to enable
1950 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1952 if (!VLOG_DROP_ERR(&rl
)) {
1956 odp_flow_format(key
, key_len
, NULL
, 0, NULL
, &s
, true);
1957 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s
));
1964 in_port
= flow
->in_port
.odp_port
;
1965 if (!is_valid_port_number(in_port
) && in_port
!= ODPP_NONE
) {
1969 /* Userspace datapath doesn't support conntrack. */
1970 if (flow
->ct_state
|| flow
->ct_zone
|| flow
->ct_mark
1971 || !ovs_u128_is_zero(&flow
->ct_label
)) {
1979 dpif_netdev_flow_get(const struct dpif
*dpif
, const struct dpif_flow_get
*get
)
1981 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1982 struct dp_netdev_flow
*netdev_flow
;
1983 struct dp_netdev_pmd_thread
*pmd
;
1984 unsigned pmd_id
= get
->pmd_id
== PMD_ID_NULL
1985 ? NON_PMD_CORE_ID
: get
->pmd_id
;
1988 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
1993 netdev_flow
= dp_netdev_pmd_find_flow(pmd
, get
->ufid
, get
->key
,
1996 dp_netdev_flow_to_dpif_flow(netdev_flow
, get
->buffer
, get
->buffer
,
2001 dp_netdev_pmd_unref(pmd
);
2007 static struct dp_netdev_flow
*
2008 dp_netdev_flow_add(struct dp_netdev_pmd_thread
*pmd
,
2009 struct match
*match
, const ovs_u128
*ufid
,
2010 const struct nlattr
*actions
, size_t actions_len
)
2011 OVS_REQUIRES(pmd
->flow_mutex
)
2013 struct dp_netdev_flow
*flow
;
2014 struct netdev_flow_key mask
;
2016 netdev_flow_mask_init(&mask
, match
);
2017 /* Make sure wc does not have metadata. */
2018 ovs_assert(!FLOWMAP_HAS_FIELD(&mask
.mf
.map
, metadata
)
2019 && !FLOWMAP_HAS_FIELD(&mask
.mf
.map
, regs
));
2021 /* Do not allocate extra space. */
2022 flow
= xmalloc(sizeof *flow
- sizeof flow
->cr
.flow
.mf
+ mask
.len
);
2023 memset(&flow
->stats
, 0, sizeof flow
->stats
);
2026 *CONST_CAST(unsigned *, &flow
->pmd_id
) = pmd
->core_id
;
2027 *CONST_CAST(struct flow
*, &flow
->flow
) = match
->flow
;
2028 *CONST_CAST(ovs_u128
*, &flow
->ufid
) = *ufid
;
2029 ovs_refcount_init(&flow
->ref_cnt
);
2030 ovsrcu_set(&flow
->actions
, dp_netdev_actions_create(actions
, actions_len
));
2032 netdev_flow_key_init_masked(&flow
->cr
.flow
, &match
->flow
, &mask
);
2033 dpcls_insert(&pmd
->cls
, &flow
->cr
, &mask
);
2035 cmap_insert(&pmd
->flow_table
, CONST_CAST(struct cmap_node
*, &flow
->node
),
2036 dp_netdev_flow_hash(&flow
->ufid
));
2038 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
2040 struct ds ds
= DS_EMPTY_INITIALIZER
;
2042 match
.tun_md
.valid
= false;
2043 match
.flow
= flow
->flow
;
2044 miniflow_expand(&flow
->cr
.mask
->mf
, &match
.wc
.masks
);
2046 ds_put_cstr(&ds
, "flow_add: ");
2047 odp_format_ufid(ufid
, &ds
);
2048 ds_put_cstr(&ds
, " ");
2049 match_format(&match
, &ds
, OFP_DEFAULT_PRIORITY
);
2050 ds_put_cstr(&ds
, ", actions:");
2051 format_odp_actions(&ds
, actions
, actions_len
);
2053 VLOG_DBG_RL(&upcall_rl
, "%s", ds_cstr(&ds
));
2062 dpif_netdev_flow_put(struct dpif
*dpif
, const struct dpif_flow_put
*put
)
2064 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2065 struct dp_netdev_flow
*netdev_flow
;
2066 struct netdev_flow_key key
;
2067 struct dp_netdev_pmd_thread
*pmd
;
2070 unsigned pmd_id
= put
->pmd_id
== PMD_ID_NULL
2071 ? NON_PMD_CORE_ID
: put
->pmd_id
;
2074 error
= dpif_netdev_flow_from_nlattrs(put
->key
, put
->key_len
, &match
.flow
);
2078 error
= dpif_netdev_mask_from_nlattrs(put
->key
, put
->key_len
,
2079 put
->mask
, put
->mask_len
,
2080 &match
.flow
, &match
.wc
);
2085 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
2090 /* Must produce a netdev_flow_key for lookup.
2091 * This interface is no longer performance critical, since it is not used
2092 * for upcall processing any more. */
2093 netdev_flow_key_from_flow(&key
, &match
.flow
);
2098 dpif_flow_hash(dpif
, &match
.flow
, sizeof match
.flow
, &ufid
);
2101 ovs_mutex_lock(&pmd
->flow_mutex
);
2102 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &key
);
2104 if (put
->flags
& DPIF_FP_CREATE
) {
2105 if (cmap_count(&pmd
->flow_table
) < MAX_FLOWS
) {
2107 memset(put
->stats
, 0, sizeof *put
->stats
);
2109 dp_netdev_flow_add(pmd
, &match
, &ufid
, put
->actions
,
2119 if (put
->flags
& DPIF_FP_MODIFY
2120 && flow_equal(&match
.flow
, &netdev_flow
->flow
)) {
2121 struct dp_netdev_actions
*new_actions
;
2122 struct dp_netdev_actions
*old_actions
;
2124 new_actions
= dp_netdev_actions_create(put
->actions
,
2127 old_actions
= dp_netdev_flow_get_actions(netdev_flow
);
2128 ovsrcu_set(&netdev_flow
->actions
, new_actions
);
2131 get_dpif_flow_stats(netdev_flow
, put
->stats
);
2133 if (put
->flags
& DPIF_FP_ZERO_STATS
) {
2134 /* XXX: The userspace datapath uses thread local statistics
2135 * (for flows), which should be updated only by the owning
2136 * thread. Since we cannot write on stats memory here,
2137 * we choose not to support this flag. Please note:
2138 * - This feature is currently used only by dpctl commands with
2140 * - Should the need arise, this operation can be implemented
2141 * by keeping a base value (to be update here) for each
2142 * counter, and subtracting it before outputting the stats */
2146 ovsrcu_postpone(dp_netdev_actions_free
, old_actions
);
2147 } else if (put
->flags
& DPIF_FP_CREATE
) {
2150 /* Overlapping flow. */
2154 ovs_mutex_unlock(&pmd
->flow_mutex
);
2155 dp_netdev_pmd_unref(pmd
);
2161 dpif_netdev_flow_del(struct dpif
*dpif
, const struct dpif_flow_del
*del
)
2163 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2164 struct dp_netdev_flow
*netdev_flow
;
2165 struct dp_netdev_pmd_thread
*pmd
;
2166 unsigned pmd_id
= del
->pmd_id
== PMD_ID_NULL
2167 ? NON_PMD_CORE_ID
: del
->pmd_id
;
2170 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
2175 ovs_mutex_lock(&pmd
->flow_mutex
);
2176 netdev_flow
= dp_netdev_pmd_find_flow(pmd
, del
->ufid
, del
->key
,
2180 get_dpif_flow_stats(netdev_flow
, del
->stats
);
2182 dp_netdev_pmd_remove_flow(pmd
, netdev_flow
);
2186 ovs_mutex_unlock(&pmd
->flow_mutex
);
2187 dp_netdev_pmd_unref(pmd
);
2192 struct dpif_netdev_flow_dump
{
2193 struct dpif_flow_dump up
;
2194 struct cmap_position poll_thread_pos
;
2195 struct cmap_position flow_pos
;
2196 struct dp_netdev_pmd_thread
*cur_pmd
;
2198 struct ovs_mutex mutex
;
2201 static struct dpif_netdev_flow_dump
*
2202 dpif_netdev_flow_dump_cast(struct dpif_flow_dump
*dump
)
2204 return CONTAINER_OF(dump
, struct dpif_netdev_flow_dump
, up
);
2207 static struct dpif_flow_dump
*
2208 dpif_netdev_flow_dump_create(const struct dpif
*dpif_
, bool terse
)
2210 struct dpif_netdev_flow_dump
*dump
;
2212 dump
= xzalloc(sizeof *dump
);
2213 dpif_flow_dump_init(&dump
->up
, dpif_
);
2214 dump
->up
.terse
= terse
;
2215 ovs_mutex_init(&dump
->mutex
);
2221 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump
*dump_
)
2223 struct dpif_netdev_flow_dump
*dump
= dpif_netdev_flow_dump_cast(dump_
);
2225 ovs_mutex_destroy(&dump
->mutex
);
2230 struct dpif_netdev_flow_dump_thread
{
2231 struct dpif_flow_dump_thread up
;
2232 struct dpif_netdev_flow_dump
*dump
;
2233 struct odputil_keybuf keybuf
[FLOW_DUMP_MAX_BATCH
];
2234 struct odputil_keybuf maskbuf
[FLOW_DUMP_MAX_BATCH
];
2237 static struct dpif_netdev_flow_dump_thread
*
2238 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread
*thread
)
2240 return CONTAINER_OF(thread
, struct dpif_netdev_flow_dump_thread
, up
);
2243 static struct dpif_flow_dump_thread
*
2244 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump
*dump_
)
2246 struct dpif_netdev_flow_dump
*dump
= dpif_netdev_flow_dump_cast(dump_
);
2247 struct dpif_netdev_flow_dump_thread
*thread
;
2249 thread
= xmalloc(sizeof *thread
);
2250 dpif_flow_dump_thread_init(&thread
->up
, &dump
->up
);
2251 thread
->dump
= dump
;
2256 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread
*thread_
)
2258 struct dpif_netdev_flow_dump_thread
*thread
2259 = dpif_netdev_flow_dump_thread_cast(thread_
);
2265 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread
*thread_
,
2266 struct dpif_flow
*flows
, int max_flows
)
2268 struct dpif_netdev_flow_dump_thread
*thread
2269 = dpif_netdev_flow_dump_thread_cast(thread_
);
2270 struct dpif_netdev_flow_dump
*dump
= thread
->dump
;
2271 struct dp_netdev_flow
*netdev_flows
[FLOW_DUMP_MAX_BATCH
];
2275 ovs_mutex_lock(&dump
->mutex
);
2276 if (!dump
->status
) {
2277 struct dpif_netdev
*dpif
= dpif_netdev_cast(thread
->up
.dpif
);
2278 struct dp_netdev
*dp
= get_dp_netdev(&dpif
->dpif
);
2279 struct dp_netdev_pmd_thread
*pmd
= dump
->cur_pmd
;
2280 int flow_limit
= MIN(max_flows
, FLOW_DUMP_MAX_BATCH
);
2282 /* First call to dump_next(), extracts the first pmd thread.
2283 * If there is no pmd thread, returns immediately. */
2285 pmd
= dp_netdev_pmd_get_next(dp
, &dump
->poll_thread_pos
);
2287 ovs_mutex_unlock(&dump
->mutex
);
2294 for (n_flows
= 0; n_flows
< flow_limit
; n_flows
++) {
2295 struct cmap_node
*node
;
2297 node
= cmap_next_position(&pmd
->flow_table
, &dump
->flow_pos
);
2301 netdev_flows
[n_flows
] = CONTAINER_OF(node
,
2302 struct dp_netdev_flow
,
2305 /* When finishing dumping the current pmd thread, moves to
2307 if (n_flows
< flow_limit
) {
2308 memset(&dump
->flow_pos
, 0, sizeof dump
->flow_pos
);
2309 dp_netdev_pmd_unref(pmd
);
2310 pmd
= dp_netdev_pmd_get_next(dp
, &dump
->poll_thread_pos
);
2316 /* Keeps the reference to next caller. */
2317 dump
->cur_pmd
= pmd
;
2319 /* If the current dump is empty, do not exit the loop, since the
2320 * remaining pmds could have flows to be dumped. Just dumps again
2321 * on the new 'pmd'. */
2324 ovs_mutex_unlock(&dump
->mutex
);
2326 for (i
= 0; i
< n_flows
; i
++) {
2327 struct odputil_keybuf
*maskbuf
= &thread
->maskbuf
[i
];
2328 struct odputil_keybuf
*keybuf
= &thread
->keybuf
[i
];
2329 struct dp_netdev_flow
*netdev_flow
= netdev_flows
[i
];
2330 struct dpif_flow
*f
= &flows
[i
];
2331 struct ofpbuf key
, mask
;
2333 ofpbuf_use_stack(&key
, keybuf
, sizeof *keybuf
);
2334 ofpbuf_use_stack(&mask
, maskbuf
, sizeof *maskbuf
);
2335 dp_netdev_flow_to_dpif_flow(netdev_flow
, &key
, &mask
, f
,
2343 dpif_netdev_execute(struct dpif
*dpif
, struct dpif_execute
*execute
)
2344 OVS_NO_THREAD_SAFETY_ANALYSIS
2346 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2347 struct dp_netdev_pmd_thread
*pmd
;
2348 struct dp_packet
*pp
;
2350 if (dp_packet_size(execute
->packet
) < ETH_HEADER_LEN
||
2351 dp_packet_size(execute
->packet
) > UINT16_MAX
) {
2355 /* Tries finding the 'pmd'. If NULL is returned, that means
2356 * the current thread is a non-pmd thread and should use
2357 * dp_netdev_get_pmd(dp, NON_PMD_CORE_ID). */
2358 pmd
= ovsthread_getspecific(dp
->per_pmd_key
);
2360 pmd
= dp_netdev_get_pmd(dp
, NON_PMD_CORE_ID
);
2363 /* If the current thread is non-pmd thread, acquires
2364 * the 'non_pmd_mutex'. */
2365 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2366 ovs_mutex_lock(&dp
->non_pmd_mutex
);
2367 ovs_mutex_lock(&dp
->port_mutex
);
2370 pp
= execute
->packet
;
2371 dp_netdev_execute_actions(pmd
, &pp
, 1, false, execute
->actions
,
2372 execute
->actions_len
);
2373 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2374 dp_netdev_pmd_unref(pmd
);
2375 ovs_mutex_unlock(&dp
->port_mutex
);
2376 ovs_mutex_unlock(&dp
->non_pmd_mutex
);
2383 dpif_netdev_operate(struct dpif
*dpif
, struct dpif_op
**ops
, size_t n_ops
)
2387 for (i
= 0; i
< n_ops
; i
++) {
2388 struct dpif_op
*op
= ops
[i
];
2391 case DPIF_OP_FLOW_PUT
:
2392 op
->error
= dpif_netdev_flow_put(dpif
, &op
->u
.flow_put
);
2395 case DPIF_OP_FLOW_DEL
:
2396 op
->error
= dpif_netdev_flow_del(dpif
, &op
->u
.flow_del
);
2399 case DPIF_OP_EXECUTE
:
2400 op
->error
= dpif_netdev_execute(dpif
, &op
->u
.execute
);
2403 case DPIF_OP_FLOW_GET
:
2404 op
->error
= dpif_netdev_flow_get(dpif
, &op
->u
.flow_get
);
2410 /* Returns true if the configuration for rx queues or cpu mask
2413 pmd_config_changed(const struct dp_netdev
*dp
, const char *cmask
)
2415 struct dp_netdev_port
*port
;
2417 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2418 struct netdev
*netdev
= port
->netdev
;
2419 int requested_n_rxq
= netdev_requested_n_rxq(netdev
);
2420 if (netdev_is_pmd(netdev
)
2421 && port
->latest_requested_n_rxq
!= requested_n_rxq
) {
2426 if (dp
->pmd_cmask
!= NULL
&& cmask
!= NULL
) {
2427 return strcmp(dp
->pmd_cmask
, cmask
);
2429 return (dp
->pmd_cmask
!= NULL
|| cmask
!= NULL
);
2433 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2435 dpif_netdev_pmd_set(struct dpif
*dpif
, const char *cmask
)
2437 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2439 if (pmd_config_changed(dp
, cmask
)) {
2440 struct dp_netdev_port
*port
;
2442 dp_netdev_destroy_all_pmds(dp
);
2444 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2445 struct netdev
*netdev
= port
->netdev
;
2446 int requested_n_rxq
= netdev_requested_n_rxq(netdev
);
2447 if (netdev_is_pmd(port
->netdev
)
2448 && port
->latest_requested_n_rxq
!= requested_n_rxq
) {
2451 /* Closes the existing 'rxq's. */
2452 for (i
= 0; i
< netdev_n_rxq(port
->netdev
); i
++) {
2453 netdev_rxq_close(port
->rxq
[i
]);
2454 port
->rxq
[i
] = NULL
;
2458 /* Sets the new rx queue config. */
2459 err
= netdev_set_multiq(port
->netdev
,
2460 ovs_numa_get_n_cores() + 1,
2462 if (err
&& (err
!= EOPNOTSUPP
)) {
2463 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2464 " %u", netdev_get_name(port
->netdev
),
2468 port
->latest_requested_n_rxq
= requested_n_rxq
;
2469 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2470 port
->n_rxq
= netdev_n_rxq(port
->netdev
);
2471 port
->rxq
= xrealloc(port
->rxq
, sizeof *port
->rxq
* port
->n_rxq
);
2472 for (i
= 0; i
< port
->n_rxq
; i
++) {
2473 netdev_rxq_open(port
->netdev
, &port
->rxq
[i
], i
);
2477 /* Reconfigures the cpu mask. */
2478 ovs_numa_set_cpu_mask(cmask
);
2479 free(dp
->pmd_cmask
);
2480 dp
->pmd_cmask
= cmask
? xstrdup(cmask
) : NULL
;
2482 /* Restores the non-pmd. */
2483 dp_netdev_set_nonpmd(dp
);
2484 /* Restores all pmd threads. */
2485 dp_netdev_reset_pmd_threads(dp
);
2492 dpif_netdev_queue_to_priority(const struct dpif
*dpif OVS_UNUSED
,
2493 uint32_t queue_id
, uint32_t *priority
)
2495 *priority
= queue_id
;
2500 /* Creates and returns a new 'struct dp_netdev_actions', whose actions are
2501 * a copy of the 'ofpacts_len' bytes of 'ofpacts'. */
2502 struct dp_netdev_actions
*
2503 dp_netdev_actions_create(const struct nlattr
*actions
, size_t size
)
2505 struct dp_netdev_actions
*netdev_actions
;
2507 netdev_actions
= xmalloc(sizeof *netdev_actions
+ size
);
2508 memcpy(netdev_actions
->actions
, actions
, size
);
2509 netdev_actions
->size
= size
;
2511 return netdev_actions
;
2514 struct dp_netdev_actions
*
2515 dp_netdev_flow_get_actions(const struct dp_netdev_flow
*flow
)
2517 return ovsrcu_get(struct dp_netdev_actions
*, &flow
->actions
);
2521 dp_netdev_actions_free(struct dp_netdev_actions
*actions
)
2526 static inline unsigned long long
2527 cycles_counter(void)
2530 return rte_get_tsc_cycles();
2536 /* Fake mutex to make sure that the calls to cycles_count_* are balanced */
2537 extern struct ovs_mutex cycles_counter_fake_mutex
;
2539 /* Start counting cycles. Must be followed by 'cycles_count_end()' */
2541 cycles_count_start(struct dp_netdev_pmd_thread
*pmd
)
2542 OVS_ACQUIRES(&cycles_counter_fake_mutex
)
2543 OVS_NO_THREAD_SAFETY_ANALYSIS
2545 pmd
->last_cycles
= cycles_counter();
2548 /* Stop counting cycles and add them to the counter 'type' */
2550 cycles_count_end(struct dp_netdev_pmd_thread
*pmd
,
2551 enum pmd_cycles_counter_type type
)
2552 OVS_RELEASES(&cycles_counter_fake_mutex
)
2553 OVS_NO_THREAD_SAFETY_ANALYSIS
2555 unsigned long long interval
= cycles_counter() - pmd
->last_cycles
;
2557 non_atomic_ullong_add(&pmd
->cycles
.n
[type
], interval
);
2561 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread
*pmd
,
2562 struct dp_netdev_port
*port
,
2563 struct netdev_rxq
*rxq
)
2565 struct dp_packet
*packets
[NETDEV_MAX_BURST
];
2568 cycles_count_start(pmd
);
2569 error
= netdev_rxq_recv(rxq
, packets
, &cnt
);
2570 cycles_count_end(pmd
, PMD_CYCLES_POLLING
);
2572 *recirc_depth_get() = 0;
2574 cycles_count_start(pmd
);
2575 dp_netdev_input(pmd
, packets
, cnt
, port
->port_no
);
2576 cycles_count_end(pmd
, PMD_CYCLES_PROCESSING
);
2577 } else if (error
!= EAGAIN
&& error
!= EOPNOTSUPP
) {
2578 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2580 VLOG_ERR_RL(&rl
, "error receiving data from %s: %s",
2581 netdev_get_name(port
->netdev
), ovs_strerror(error
));
2585 /* Return true if needs to revalidate datapath flows. */
2587 dpif_netdev_run(struct dpif
*dpif
)
2589 struct dp_netdev_port
*port
;
2590 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2591 struct dp_netdev_pmd_thread
*non_pmd
= dp_netdev_get_pmd(dp
,
2593 uint64_t new_tnl_seq
;
2595 ovs_mutex_lock(&dp
->non_pmd_mutex
);
2596 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2597 if (!netdev_is_pmd(port
->netdev
)) {
2600 for (i
= 0; i
< port
->n_rxq
; i
++) {
2601 dp_netdev_process_rxq_port(non_pmd
, port
, port
->rxq
[i
]);
2605 ovs_mutex_unlock(&dp
->non_pmd_mutex
);
2606 dp_netdev_pmd_unref(non_pmd
);
2608 tnl_neigh_cache_run();
2610 new_tnl_seq
= seq_read(tnl_conf_seq
);
2612 if (dp
->last_tnl_conf_seq
!= new_tnl_seq
) {
2613 dp
->last_tnl_conf_seq
= new_tnl_seq
;
2620 dpif_netdev_wait(struct dpif
*dpif
)
2622 struct dp_netdev_port
*port
;
2623 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2625 ovs_mutex_lock(&dp_netdev_mutex
);
2626 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2627 if (!netdev_is_pmd(port
->netdev
)) {
2630 for (i
= 0; i
< port
->n_rxq
; i
++) {
2631 netdev_rxq_wait(port
->rxq
[i
]);
2635 ovs_mutex_unlock(&dp_netdev_mutex
);
2636 seq_wait(tnl_conf_seq
, dp
->last_tnl_conf_seq
);
2640 pmd_load_queues(struct dp_netdev_pmd_thread
*pmd
, struct rxq_poll
**ppoll_list
)
2641 OVS_REQUIRES(pmd
->poll_mutex
)
2643 struct rxq_poll
*poll_list
= *ppoll_list
;
2644 struct rxq_poll
*poll
;
2647 poll_list
= xrealloc(poll_list
, pmd
->poll_cnt
* sizeof *poll_list
);
2650 LIST_FOR_EACH (poll
, node
, &pmd
->poll_list
) {
2651 poll_list
[i
++] = *poll
;
2654 *ppoll_list
= poll_list
;
2655 return pmd
->poll_cnt
;
2659 pmd_thread_main(void *f_
)
2661 struct dp_netdev_pmd_thread
*pmd
= f_
;
2662 unsigned int lc
= 0;
2663 struct rxq_poll
*poll_list
;
2664 unsigned int port_seq
= PMD_INITIAL_SEQ
;
2671 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2672 ovsthread_setspecific(pmd
->dp
->per_pmd_key
, pmd
);
2673 pmd_thread_setaffinity_cpu(pmd
->core_id
);
2675 emc_cache_init(&pmd
->flow_cache
);
2677 ovs_mutex_lock(&pmd
->poll_mutex
);
2678 poll_cnt
= pmd_load_queues(pmd
, &poll_list
);
2679 ovs_mutex_unlock(&pmd
->poll_mutex
);
2681 /* List port/core affinity */
2682 for (i
= 0; i
< poll_cnt
; i
++) {
2683 VLOG_DBG("Core %d processing port \'%s\' with queue-id %d\n",
2684 pmd
->core_id
, netdev_get_name(poll_list
[i
].port
->netdev
),
2685 netdev_rxq_get_queue_id(poll_list
[i
].rx
));
2688 /* Signal here to make sure the pmd finishes
2689 * reloading the updated configuration. */
2690 dp_netdev_pmd_reload_done(pmd
);
2693 for (i
= 0; i
< poll_cnt
; i
++) {
2694 dp_netdev_process_rxq_port(pmd
, poll_list
[i
].port
, poll_list
[i
].rx
);
2702 emc_cache_slow_sweep(&pmd
->flow_cache
);
2703 coverage_try_clear();
2706 atomic_read_relaxed(&pmd
->change_seq
, &seq
);
2707 if (seq
!= port_seq
) {
2714 emc_cache_uninit(&pmd
->flow_cache
);
2716 if (!latch_is_set(&pmd
->exit_latch
)){
2720 dp_netdev_pmd_reload_done(pmd
);
2727 dp_netdev_disable_upcall(struct dp_netdev
*dp
)
2728 OVS_ACQUIRES(dp
->upcall_rwlock
)
2730 fat_rwlock_wrlock(&dp
->upcall_rwlock
);
2734 dpif_netdev_disable_upcall(struct dpif
*dpif
)
2735 OVS_NO_THREAD_SAFETY_ANALYSIS
2737 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2738 dp_netdev_disable_upcall(dp
);
2742 dp_netdev_enable_upcall(struct dp_netdev
*dp
)
2743 OVS_RELEASES(dp
->upcall_rwlock
)
2745 fat_rwlock_unlock(&dp
->upcall_rwlock
);
2749 dpif_netdev_enable_upcall(struct dpif
*dpif
)
2750 OVS_NO_THREAD_SAFETY_ANALYSIS
2752 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2753 dp_netdev_enable_upcall(dp
);
2757 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread
*pmd
)
2759 ovs_mutex_lock(&pmd
->cond_mutex
);
2760 xpthread_cond_signal(&pmd
->cond
);
2761 ovs_mutex_unlock(&pmd
->cond_mutex
);
2764 /* Finds and refs the dp_netdev_pmd_thread on core 'core_id'. Returns
2765 * the pointer if succeeds, otherwise, NULL.
2767 * Caller must unrefs the returned reference. */
2768 static struct dp_netdev_pmd_thread
*
2769 dp_netdev_get_pmd(struct dp_netdev
*dp
, unsigned core_id
)
2771 struct dp_netdev_pmd_thread
*pmd
;
2772 const struct cmap_node
*pnode
;
2774 pnode
= cmap_find(&dp
->poll_threads
, hash_int(core_id
, 0));
2778 pmd
= CONTAINER_OF(pnode
, struct dp_netdev_pmd_thread
, node
);
2780 return dp_netdev_pmd_try_ref(pmd
) ? pmd
: NULL
;
2783 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2785 dp_netdev_set_nonpmd(struct dp_netdev
*dp
)
2787 struct dp_netdev_pmd_thread
*non_pmd
;
2789 non_pmd
= xzalloc(sizeof *non_pmd
);
2790 dp_netdev_configure_pmd(non_pmd
, dp
, 0, NON_PMD_CORE_ID
,
2794 /* Caller must have valid pointer to 'pmd'. */
2796 dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread
*pmd
)
2798 return ovs_refcount_try_ref_rcu(&pmd
->ref_cnt
);
2802 dp_netdev_pmd_unref(struct dp_netdev_pmd_thread
*pmd
)
2804 if (pmd
&& ovs_refcount_unref(&pmd
->ref_cnt
) == 1) {
2805 ovsrcu_postpone(dp_netdev_destroy_pmd
, pmd
);
2809 /* Given cmap position 'pos', tries to ref the next node. If try_ref()
2810 * fails, keeps checking for next node until reaching the end of cmap.
2812 * Caller must unrefs the returned reference. */
2813 static struct dp_netdev_pmd_thread
*
2814 dp_netdev_pmd_get_next(struct dp_netdev
*dp
, struct cmap_position
*pos
)
2816 struct dp_netdev_pmd_thread
*next
;
2819 struct cmap_node
*node
;
2821 node
= cmap_next_position(&dp
->poll_threads
, pos
);
2822 next
= node
? CONTAINER_OF(node
, struct dp_netdev_pmd_thread
, node
)
2824 } while (next
&& !dp_netdev_pmd_try_ref(next
));
2829 /* Configures the 'pmd' based on the input argument. */
2831 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread
*pmd
, struct dp_netdev
*dp
,
2832 int index
, unsigned core_id
, int numa_id
)
2836 pmd
->core_id
= core_id
;
2837 pmd
->numa_id
= numa_id
;
2840 atomic_init(&pmd
->tx_qid
,
2841 (core_id
== NON_PMD_CORE_ID
)
2842 ? ovs_numa_get_n_cores()
2843 : get_n_pmd_threads(dp
));
2845 ovs_refcount_init(&pmd
->ref_cnt
);
2846 latch_init(&pmd
->exit_latch
);
2847 atomic_init(&pmd
->change_seq
, PMD_INITIAL_SEQ
);
2848 xpthread_cond_init(&pmd
->cond
, NULL
);
2849 ovs_mutex_init(&pmd
->cond_mutex
);
2850 ovs_mutex_init(&pmd
->flow_mutex
);
2851 ovs_mutex_init(&pmd
->poll_mutex
);
2852 dpcls_init(&pmd
->cls
);
2853 cmap_init(&pmd
->flow_table
);
2854 ovs_list_init(&pmd
->poll_list
);
2855 /* init the 'flow_cache' since there is no
2856 * actual thread created for NON_PMD_CORE_ID. */
2857 if (core_id
== NON_PMD_CORE_ID
) {
2858 emc_cache_init(&pmd
->flow_cache
);
2860 cmap_insert(&dp
->poll_threads
, CONST_CAST(struct cmap_node
*, &pmd
->node
),
2861 hash_int(core_id
, 0));
2865 dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread
*pmd
)
2867 dp_netdev_pmd_flow_flush(pmd
);
2868 dpcls_destroy(&pmd
->cls
);
2869 cmap_destroy(&pmd
->flow_table
);
2870 ovs_mutex_destroy(&pmd
->flow_mutex
);
2871 latch_destroy(&pmd
->exit_latch
);
2872 xpthread_cond_destroy(&pmd
->cond
);
2873 ovs_mutex_destroy(&pmd
->cond_mutex
);
2874 ovs_mutex_destroy(&pmd
->poll_mutex
);
2878 /* Stops the pmd thread, removes it from the 'dp->poll_threads',
2879 * and unrefs the struct. */
2881 dp_netdev_del_pmd(struct dp_netdev
*dp
, struct dp_netdev_pmd_thread
*pmd
)
2883 /* Uninit the 'flow_cache' since there is
2884 * no actual thread uninit it for NON_PMD_CORE_ID. */
2885 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2886 emc_cache_uninit(&pmd
->flow_cache
);
2888 latch_set(&pmd
->exit_latch
);
2889 dp_netdev_reload_pmd__(pmd
);
2890 ovs_numa_unpin_core(pmd
->core_id
);
2891 xpthread_join(pmd
->thread
, NULL
);
2894 /* Unref all ports and free poll_list. */
2895 dp_netdev_pmd_clear_poll_list(pmd
);
2897 /* Purges the 'pmd''s flows after stopping the thread, but before
2898 * destroying the flows, so that the flow stats can be collected. */
2899 if (dp
->dp_purge_cb
) {
2900 dp
->dp_purge_cb(dp
->dp_purge_aux
, pmd
->core_id
);
2902 cmap_remove(&pmd
->dp
->poll_threads
, &pmd
->node
, hash_int(pmd
->core_id
, 0));
2903 dp_netdev_pmd_unref(pmd
);
2906 /* Destroys all pmd threads. */
2908 dp_netdev_destroy_all_pmds(struct dp_netdev
*dp
)
2910 struct dp_netdev_pmd_thread
*pmd
;
2911 struct dp_netdev_pmd_thread
**pmd_list
;
2912 size_t k
= 0, n_pmds
;
2914 n_pmds
= cmap_count(&dp
->poll_threads
);
2915 pmd_list
= xcalloc(n_pmds
, sizeof *pmd_list
);
2917 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2918 /* We cannot call dp_netdev_del_pmd(), since it alters
2919 * 'dp->poll_threads' (while we're iterating it) and it
2921 ovs_assert(k
< n_pmds
);
2922 pmd_list
[k
++] = pmd
;
2925 for (size_t i
= 0; i
< k
; i
++) {
2926 dp_netdev_del_pmd(dp
, pmd_list
[i
]);
2931 /* Deletes all pmd threads on numa node 'numa_id' and
2932 * fixes tx_qids of other threads to keep them sequential. */
2934 dp_netdev_del_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
)
2936 struct dp_netdev_pmd_thread
*pmd
;
2937 int n_pmds_on_numa
, n_pmds
;
2938 int *free_idx
, k
= 0;
2939 struct dp_netdev_pmd_thread
**pmd_list
;
2941 n_pmds_on_numa
= get_n_pmd_threads_on_numa(dp
, numa_id
);
2942 free_idx
= xcalloc(n_pmds_on_numa
, sizeof *free_idx
);
2943 pmd_list
= xcalloc(n_pmds_on_numa
, sizeof *pmd_list
);
2945 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2946 /* We cannot call dp_netdev_del_pmd(), since it alters
2947 * 'dp->poll_threads' (while we're iterating it) and it
2949 if (pmd
->numa_id
== numa_id
) {
2950 atomic_read_relaxed(&pmd
->tx_qid
, &free_idx
[k
]);
2952 ovs_assert(k
< n_pmds_on_numa
);
2957 for (int i
= 0; i
< k
; i
++) {
2958 dp_netdev_del_pmd(dp
, pmd_list
[i
]);
2961 n_pmds
= get_n_pmd_threads(dp
);
2962 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2965 atomic_read_relaxed(&pmd
->tx_qid
, &old_tx_qid
);
2967 if (old_tx_qid
>= n_pmds
) {
2968 int new_tx_qid
= free_idx
[--k
];
2970 atomic_store_relaxed(&pmd
->tx_qid
, new_tx_qid
);
2978 /* Deletes all rx queues from pmd->poll_list. */
2980 dp_netdev_pmd_clear_poll_list(struct dp_netdev_pmd_thread
*pmd
)
2982 struct rxq_poll
*poll
;
2984 ovs_mutex_lock(&pmd
->poll_mutex
);
2985 LIST_FOR_EACH_POP (poll
, node
, &pmd
->poll_list
) {
2989 ovs_mutex_unlock(&pmd
->poll_mutex
);
2992 /* Deletes all rx queues of 'port' from poll_list of pmd thread and
2993 * reloads it if poll_list was changed. */
2995 dp_netdev_del_port_from_pmd(struct dp_netdev_port
*port
,
2996 struct dp_netdev_pmd_thread
*pmd
)
2998 struct rxq_poll
*poll
, *next
;
3001 ovs_mutex_lock(&pmd
->poll_mutex
);
3002 LIST_FOR_EACH_SAFE (poll
, next
, node
, &pmd
->poll_list
) {
3003 if (poll
->port
== port
) {
3005 ovs_list_remove(&poll
->node
);
3010 ovs_mutex_unlock(&pmd
->poll_mutex
);
3012 dp_netdev_reload_pmd__(pmd
);
3016 /* Deletes all rx queues of 'port' from all pmd threads of dp and
3017 * reloads them if needed. */
3019 dp_netdev_del_port_from_all_pmds(struct dp_netdev
*dp
,
3020 struct dp_netdev_port
*port
)
3022 int numa_id
= netdev_get_numa_id(port
->netdev
);
3023 struct dp_netdev_pmd_thread
*pmd
;
3025 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
3026 if (pmd
->numa_id
== numa_id
) {
3027 dp_netdev_del_port_from_pmd(port
, pmd
);
3032 /* Returns PMD thread from this numa node with fewer rx queues to poll.
3033 * Returns NULL if there is no PMD threads on this numa node.
3034 * Can be called safely only by main thread. */
3035 static struct dp_netdev_pmd_thread
*
3036 dp_netdev_less_loaded_pmd_on_numa(struct dp_netdev
*dp
, int numa_id
)
3039 struct dp_netdev_pmd_thread
*pmd
, *res
= NULL
;
3041 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
3042 if (pmd
->numa_id
== numa_id
3043 && (min_cnt
> pmd
->poll_cnt
|| res
== NULL
)) {
3044 min_cnt
= pmd
->poll_cnt
;
3052 /* Adds rx queue to poll_list of PMD thread. */
3054 dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread
*pmd
,
3055 struct dp_netdev_port
*port
, struct netdev_rxq
*rx
)
3056 OVS_REQUIRES(pmd
->poll_mutex
)
3058 struct rxq_poll
*poll
= xmalloc(sizeof *poll
);
3063 ovs_list_push_back(&pmd
->poll_list
, &poll
->node
);
3067 /* Distributes all rx queues of 'port' between all PMD threads and reloads
3068 * them if needed. */
3070 dp_netdev_add_port_to_pmds(struct dp_netdev
*dp
, struct dp_netdev_port
*port
)
3072 int numa_id
= netdev_get_numa_id(port
->netdev
);
3073 struct dp_netdev_pmd_thread
*pmd
;
3074 struct hmapx to_reload
;
3075 struct hmapx_node
*node
;
3078 hmapx_init(&to_reload
);
3079 /* Cannot create pmd threads for invalid numa node. */
3080 ovs_assert(ovs_numa_numa_id_is_valid(numa_id
));
3082 for (i
= 0; i
< port
->n_rxq
; i
++) {
3083 pmd
= dp_netdev_less_loaded_pmd_on_numa(dp
, numa_id
);
3085 /* There is no pmd threads on this numa node. */
3086 dp_netdev_set_pmds_on_numa(dp
, numa_id
);
3087 /* Assigning of rx queues done. */
3091 ovs_mutex_lock(&pmd
->poll_mutex
);
3092 dp_netdev_add_rxq_to_pmd(pmd
, port
, port
->rxq
[i
]);
3093 ovs_mutex_unlock(&pmd
->poll_mutex
);
3095 hmapx_add(&to_reload
, pmd
);
3098 HMAPX_FOR_EACH (node
, &to_reload
) {
3099 pmd
= (struct dp_netdev_pmd_thread
*) node
->data
;
3100 dp_netdev_reload_pmd__(pmd
);
3103 hmapx_destroy(&to_reload
);
3106 /* Checks the numa node id of 'netdev' and starts pmd threads for
3109 dp_netdev_set_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
)
3113 if (!ovs_numa_numa_id_is_valid(numa_id
)) {
3114 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
3115 "invalid", numa_id
);
3119 n_pmds
= get_n_pmd_threads_on_numa(dp
, numa_id
);
3121 /* If there are already pmd threads created for the numa node
3122 * in which 'netdev' is on, do nothing. Else, creates the
3123 * pmd threads for the numa node. */
3125 int can_have
, n_unpinned
, i
, index
= 0;
3126 struct dp_netdev_pmd_thread
**pmds
;
3127 struct dp_netdev_port
*port
;
3129 n_unpinned
= ovs_numa_get_n_unpinned_cores_on_numa(numa_id
);
3131 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
3132 "cores on numa node %d", numa_id
);
3136 /* If cpu mask is specified, uses all unpinned cores, otherwise
3137 * tries creating NR_PMD_THREADS pmd threads. */
3138 can_have
= dp
->pmd_cmask
? n_unpinned
: MIN(n_unpinned
, NR_PMD_THREADS
);
3139 pmds
= xzalloc(can_have
* sizeof *pmds
);
3140 for (i
= 0; i
< can_have
; i
++) {
3141 unsigned core_id
= ovs_numa_get_unpinned_core_on_numa(numa_id
);
3142 pmds
[i
] = xzalloc(sizeof **pmds
);
3143 dp_netdev_configure_pmd(pmds
[i
], dp
, i
, core_id
, numa_id
);
3146 /* Distributes rx queues of this numa node between new pmd threads. */
3147 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
3148 if (netdev_is_pmd(port
->netdev
)
3149 && netdev_get_numa_id(port
->netdev
) == numa_id
) {
3150 for (i
= 0; i
< port
->n_rxq
; i
++) {
3151 /* Make thread-safety analyser happy. */
3152 ovs_mutex_lock(&pmds
[index
]->poll_mutex
);
3153 dp_netdev_add_rxq_to_pmd(pmds
[index
], port
, port
->rxq
[i
]);
3154 ovs_mutex_unlock(&pmds
[index
]->poll_mutex
);
3155 index
= (index
+ 1) % can_have
;
3160 /* Actual start of pmd threads. */
3161 for (i
= 0; i
< can_have
; i
++) {
3162 pmds
[i
]->thread
= ovs_thread_create("pmd", pmd_thread_main
, pmds
[i
]);
3165 VLOG_INFO("Created %d pmd threads on numa node %d", can_have
, numa_id
);
3170 /* Called after pmd threads config change. Restarts pmd threads with
3171 * new configuration. */
3173 dp_netdev_reset_pmd_threads(struct dp_netdev
*dp
)
3175 struct dp_netdev_port
*port
;
3177 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
3178 if (netdev_is_pmd(port
->netdev
)) {
3179 int numa_id
= netdev_get_numa_id(port
->netdev
);
3181 dp_netdev_set_pmds_on_numa(dp
, numa_id
);
3187 dpif_netdev_get_datapath_version(void)
3189 return xstrdup("<built-in>");
3193 dp_netdev_flow_used(struct dp_netdev_flow
*netdev_flow
, int cnt
, int size
,
3194 uint16_t tcp_flags
, long long now
)
3198 atomic_store_relaxed(&netdev_flow
->stats
.used
, now
);
3199 non_atomic_ullong_add(&netdev_flow
->stats
.packet_count
, cnt
);
3200 non_atomic_ullong_add(&netdev_flow
->stats
.byte_count
, size
);
3201 atomic_read_relaxed(&netdev_flow
->stats
.tcp_flags
, &flags
);
3203 atomic_store_relaxed(&netdev_flow
->stats
.tcp_flags
, flags
);
3207 dp_netdev_count_packet(struct dp_netdev_pmd_thread
*pmd
,
3208 enum dp_stat_type type
, int cnt
)
3210 non_atomic_ullong_add(&pmd
->stats
.n
[type
], cnt
);
3214 dp_netdev_upcall(struct dp_netdev_pmd_thread
*pmd
, struct dp_packet
*packet_
,
3215 struct flow
*flow
, struct flow_wildcards
*wc
, ovs_u128
*ufid
,
3216 enum dpif_upcall_type type
, const struct nlattr
*userdata
,
3217 struct ofpbuf
*actions
, struct ofpbuf
*put_actions
)
3219 struct dp_netdev
*dp
= pmd
->dp
;
3220 struct flow_tnl orig_tunnel
;
3223 if (OVS_UNLIKELY(!dp
->upcall_cb
)) {
3227 /* Upcall processing expects the Geneve options to be in the translated
3228 * format but we need to retain the raw format for datapath use. */
3229 orig_tunnel
.flags
= flow
->tunnel
.flags
;
3230 if (flow
->tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3231 orig_tunnel
.metadata
.present
.len
= flow
->tunnel
.metadata
.present
.len
;
3232 memcpy(orig_tunnel
.metadata
.opts
.gnv
, flow
->tunnel
.metadata
.opts
.gnv
,
3233 flow
->tunnel
.metadata
.present
.len
);
3234 err
= tun_metadata_from_geneve_udpif(&orig_tunnel
, &orig_tunnel
,
3241 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl
))) {
3242 struct ds ds
= DS_EMPTY_INITIALIZER
;
3245 struct odp_flow_key_parms odp_parms
= {
3248 .odp_in_port
= flow
->in_port
.odp_port
,
3249 .support
= dp_netdev_support
,
3252 ofpbuf_init(&key
, 0);
3253 odp_flow_key_from_flow(&odp_parms
, &key
);
3254 packet_str
= ofp_packet_to_string(dp_packet_data(packet_
),
3255 dp_packet_size(packet_
));
3257 odp_flow_key_format(key
.data
, key
.size
, &ds
);
3259 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp
->name
,
3260 dpif_upcall_type_to_string(type
), ds_cstr(&ds
), packet_str
);
3262 ofpbuf_uninit(&key
);
3268 err
= dp
->upcall_cb(packet_
, flow
, ufid
, pmd
->core_id
, type
, userdata
,
3269 actions
, wc
, put_actions
, dp
->upcall_aux
);
3270 if (err
&& err
!= ENOSPC
) {
3274 /* Translate tunnel metadata masks to datapath format. */
3276 if (wc
->masks
.tunnel
.metadata
.present
.map
) {
3277 struct geneve_opt opts
[TLV_TOT_OPT_SIZE
/
3278 sizeof(struct geneve_opt
)];
3280 if (orig_tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3281 tun_metadata_to_geneve_udpif_mask(&flow
->tunnel
,
3283 orig_tunnel
.metadata
.opts
.gnv
,
3284 orig_tunnel
.metadata
.present
.len
,
3287 orig_tunnel
.metadata
.present
.len
= 0;
3290 memset(&wc
->masks
.tunnel
.metadata
, 0,
3291 sizeof wc
->masks
.tunnel
.metadata
);
3292 memcpy(&wc
->masks
.tunnel
.metadata
.opts
.gnv
, opts
,
3293 orig_tunnel
.metadata
.present
.len
);
3295 wc
->masks
.tunnel
.metadata
.present
.len
= 0xff;
3298 /* Restore tunnel metadata. We need to use the saved options to ensure
3299 * that any unknown options are not lost. The generated mask will have
3300 * the same structure, matching on types and lengths but wildcarding
3301 * option data we don't care about. */
3302 if (orig_tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3303 memcpy(&flow
->tunnel
.metadata
.opts
.gnv
, orig_tunnel
.metadata
.opts
.gnv
,
3304 orig_tunnel
.metadata
.present
.len
);
3305 flow
->tunnel
.metadata
.present
.len
= orig_tunnel
.metadata
.present
.len
;
3306 flow
->tunnel
.flags
|= FLOW_TNL_F_UDPIF
;
3312 static inline uint32_t
3313 dpif_netdev_packet_get_rss_hash(struct dp_packet
*packet
,
3314 const struct miniflow
*mf
)
3316 uint32_t hash
, recirc_depth
;
3318 if (OVS_LIKELY(dp_packet_rss_valid(packet
))) {
3319 hash
= dp_packet_get_rss_hash(packet
);
3321 hash
= miniflow_hash_5tuple(mf
, 0);
3322 dp_packet_set_rss_hash(packet
, hash
);
3325 /* The RSS hash must account for the recirculation depth to avoid
3326 * collisions in the exact match cache */
3327 recirc_depth
= *recirc_depth_get_unsafe();
3328 if (OVS_UNLIKELY(recirc_depth
)) {
3329 hash
= hash_finish(hash
, recirc_depth
);
3330 dp_packet_set_rss_hash(packet
, hash
);
3335 struct packet_batch
{
3336 unsigned int packet_count
;
3337 unsigned int byte_count
;
3340 struct dp_netdev_flow
*flow
;
3342 struct dp_packet
*packets
[NETDEV_MAX_BURST
];
3346 packet_batch_update(struct packet_batch
*batch
, struct dp_packet
*packet
,
3347 const struct miniflow
*mf
)
3349 batch
->tcp_flags
|= miniflow_get_tcp_flags(mf
);
3350 batch
->packets
[batch
->packet_count
++] = packet
;
3351 batch
->byte_count
+= dp_packet_size(packet
);
3355 packet_batch_init(struct packet_batch
*batch
, struct dp_netdev_flow
*flow
)
3357 flow
->batch
= batch
;
3360 batch
->packet_count
= 0;
3361 batch
->byte_count
= 0;
3362 batch
->tcp_flags
= 0;
3366 packet_batch_execute(struct packet_batch
*batch
,
3367 struct dp_netdev_pmd_thread
*pmd
,
3370 struct dp_netdev_actions
*actions
;
3371 struct dp_netdev_flow
*flow
= batch
->flow
;
3373 dp_netdev_flow_used(flow
, batch
->packet_count
, batch
->byte_count
,
3374 batch
->tcp_flags
, now
);
3376 actions
= dp_netdev_flow_get_actions(flow
);
3378 dp_netdev_execute_actions(pmd
, batch
->packets
, batch
->packet_count
, true,
3379 actions
->actions
, actions
->size
);
3383 dp_netdev_queue_batches(struct dp_packet
*pkt
,
3384 struct dp_netdev_flow
*flow
, const struct miniflow
*mf
,
3385 struct packet_batch
*batches
, size_t *n_batches
)
3387 struct packet_batch
*batch
= flow
->batch
;
3389 if (OVS_UNLIKELY(!batch
)) {
3390 batch
= &batches
[(*n_batches
)++];
3391 packet_batch_init(batch
, flow
);
3394 packet_batch_update(batch
, pkt
, mf
);
3397 /* Try to process all ('cnt') the 'packets' using only the exact match cache
3398 * 'pmd->flow_cache'. If a flow is not found for a packet 'packets[i]', the
3399 * miniflow is copied into 'keys' and the packet pointer is moved at the
3400 * beginning of the 'packets' array.
3402 * The function returns the number of packets that needs to be processed in the
3403 * 'packets' array (they have been moved to the beginning of the vector).
3405 * If 'md_is_valid' is false, the metadata in 'packets' is not valid and must be
3406 * initialized by this function using 'port_no'.
3408 static inline size_t
3409 emc_processing(struct dp_netdev_pmd_thread
*pmd
, struct dp_packet
**packets
,
3410 size_t cnt
, struct netdev_flow_key
*keys
,
3411 struct packet_batch batches
[], size_t *n_batches
,
3412 bool md_is_valid
, odp_port_t port_no
)
3414 struct emc_cache
*flow_cache
= &pmd
->flow_cache
;
3415 struct netdev_flow_key
*key
= &keys
[0];
3416 size_t i
, n_missed
= 0, n_dropped
= 0;
3418 for (i
= 0; i
< cnt
; i
++) {
3419 struct dp_netdev_flow
*flow
;
3420 struct dp_packet
*packet
= packets
[i
];
3422 if (OVS_UNLIKELY(dp_packet_size(packet
) < ETH_HEADER_LEN
)) {
3423 dp_packet_delete(packet
);
3429 /* Prefetch next packet data and metadata. */
3430 OVS_PREFETCH(dp_packet_data(packets
[i
+1]));
3431 pkt_metadata_prefetch_init(&packets
[i
+1]->md
);
3435 pkt_metadata_init(&packet
->md
, port_no
);
3437 miniflow_extract(packet
, &key
->mf
);
3438 key
->len
= 0; /* Not computed yet. */
3439 key
->hash
= dpif_netdev_packet_get_rss_hash(packet
, &key
->mf
);
3441 flow
= emc_lookup(flow_cache
, key
);
3442 if (OVS_LIKELY(flow
)) {
3443 dp_netdev_queue_batches(packet
, flow
, &key
->mf
, batches
,
3446 /* Exact match cache missed. Group missed packets together at
3447 * the beginning of the 'packets' array. */
3448 packets
[n_missed
] = packet
;
3449 /* 'key[n_missed]' contains the key of the current packet and it
3450 * must be returned to the caller. The next key should be extracted
3451 * to 'keys[n_missed + 1]'. */
3452 key
= &keys
[++n_missed
];
3456 dp_netdev_count_packet(pmd
, DP_STAT_EXACT_HIT
, cnt
- n_dropped
- n_missed
);
3462 fast_path_processing(struct dp_netdev_pmd_thread
*pmd
,
3463 struct dp_packet
**packets
, size_t cnt
,
3464 struct netdev_flow_key
*keys
,
3465 struct packet_batch batches
[], size_t *n_batches
)
3467 #if !defined(__CHECKER__) && !defined(_WIN32)
3468 const size_t PKT_ARRAY_SIZE
= cnt
;
3470 /* Sparse or MSVC doesn't like variable length array. */
3471 enum { PKT_ARRAY_SIZE
= NETDEV_MAX_BURST
};
3473 struct dpcls_rule
*rules
[PKT_ARRAY_SIZE
];
3474 struct dp_netdev
*dp
= pmd
->dp
;
3475 struct emc_cache
*flow_cache
= &pmd
->flow_cache
;
3476 int miss_cnt
= 0, lost_cnt
= 0;
3480 for (i
= 0; i
< cnt
; i
++) {
3481 /* Key length is needed in all the cases, hash computed on demand. */
3482 keys
[i
].len
= netdev_flow_key_size(miniflow_n_values(&keys
[i
].mf
));
3484 any_miss
= !dpcls_lookup(&pmd
->cls
, keys
, rules
, cnt
);
3485 if (OVS_UNLIKELY(any_miss
) && !fat_rwlock_tryrdlock(&dp
->upcall_rwlock
)) {
3486 uint64_t actions_stub
[512 / 8], slow_stub
[512 / 8];
3487 struct ofpbuf actions
, put_actions
;
3490 ofpbuf_use_stub(&actions
, actions_stub
, sizeof actions_stub
);
3491 ofpbuf_use_stub(&put_actions
, slow_stub
, sizeof slow_stub
);
3493 for (i
= 0; i
< cnt
; i
++) {
3494 struct dp_netdev_flow
*netdev_flow
;
3495 struct ofpbuf
*add_actions
;
3499 if (OVS_LIKELY(rules
[i
])) {
3503 /* It's possible that an earlier slow path execution installed
3504 * a rule covering this flow. In this case, it's a lot cheaper
3505 * to catch it here than execute a miss. */
3506 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &keys
[i
]);
3508 rules
[i
] = &netdev_flow
->cr
;
3514 match
.tun_md
.valid
= false;
3515 miniflow_expand(&keys
[i
].mf
, &match
.flow
);
3517 ofpbuf_clear(&actions
);
3518 ofpbuf_clear(&put_actions
);
3520 dpif_flow_hash(dp
->dpif
, &match
.flow
, sizeof match
.flow
, &ufid
);
3521 error
= dp_netdev_upcall(pmd
, packets
[i
], &match
.flow
, &match
.wc
,
3522 &ufid
, DPIF_UC_MISS
, NULL
, &actions
,
3524 if (OVS_UNLIKELY(error
&& error
!= ENOSPC
)) {
3525 dp_packet_delete(packets
[i
]);
3530 /* The Netlink encoding of datapath flow keys cannot express
3531 * wildcarding the presence of a VLAN tag. Instead, a missing VLAN
3532 * tag is interpreted as exact match on the fact that there is no
3533 * VLAN. Unless we refactor a lot of code that translates between
3534 * Netlink and struct flow representations, we have to do the same
3536 if (!match
.wc
.masks
.vlan_tci
) {
3537 match
.wc
.masks
.vlan_tci
= htons(0xffff);
3540 /* We can't allow the packet batching in the next loop to execute
3541 * the actions. Otherwise, if there are any slow path actions,
3542 * we'll send the packet up twice. */
3543 dp_netdev_execute_actions(pmd
, &packets
[i
], 1, true,
3544 actions
.data
, actions
.size
);
3546 add_actions
= put_actions
.size
? &put_actions
: &actions
;
3547 if (OVS_LIKELY(error
!= ENOSPC
)) {
3548 /* XXX: There's a race window where a flow covering this packet
3549 * could have already been installed since we last did the flow
3550 * lookup before upcall. This could be solved by moving the
3551 * mutex lock outside the loop, but that's an awful long time
3552 * to be locking everyone out of making flow installs. If we
3553 * move to a per-core classifier, it would be reasonable. */
3554 ovs_mutex_lock(&pmd
->flow_mutex
);
3555 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &keys
[i
]);
3556 if (OVS_LIKELY(!netdev_flow
)) {
3557 netdev_flow
= dp_netdev_flow_add(pmd
, &match
, &ufid
,
3561 ovs_mutex_unlock(&pmd
->flow_mutex
);
3563 emc_insert(flow_cache
, &keys
[i
], netdev_flow
);
3567 ofpbuf_uninit(&actions
);
3568 ofpbuf_uninit(&put_actions
);
3569 fat_rwlock_unlock(&dp
->upcall_rwlock
);
3570 dp_netdev_count_packet(pmd
, DP_STAT_LOST
, lost_cnt
);
3571 } else if (OVS_UNLIKELY(any_miss
)) {
3572 for (i
= 0; i
< cnt
; i
++) {
3573 if (OVS_UNLIKELY(!rules
[i
])) {
3574 dp_packet_delete(packets
[i
]);
3581 for (i
= 0; i
< cnt
; i
++) {
3582 struct dp_packet
*packet
= packets
[i
];
3583 struct dp_netdev_flow
*flow
;
3585 if (OVS_UNLIKELY(!rules
[i
])) {
3589 flow
= dp_netdev_flow_cast(rules
[i
]);
3591 emc_insert(flow_cache
, &keys
[i
], flow
);
3592 dp_netdev_queue_batches(packet
, flow
, &keys
[i
].mf
, batches
, n_batches
);
3595 dp_netdev_count_packet(pmd
, DP_STAT_MASKED_HIT
, cnt
- miss_cnt
);
3596 dp_netdev_count_packet(pmd
, DP_STAT_MISS
, miss_cnt
);
3597 dp_netdev_count_packet(pmd
, DP_STAT_LOST
, lost_cnt
);
3600 /* Packets enter the datapath from a port (or from recirculation) here.
3602 * For performance reasons a caller may choose not to initialize the metadata
3603 * in 'packets': in this case 'mdinit' is false and this function needs to
3604 * initialize it using 'port_no'. If the metadata in 'packets' is already
3605 * valid, 'md_is_valid' must be true and 'port_no' will be ignored. */
3607 dp_netdev_input__(struct dp_netdev_pmd_thread
*pmd
,
3608 struct dp_packet
**packets
, int cnt
,
3609 bool md_is_valid
, odp_port_t port_no
)
3611 #if !defined(__CHECKER__) && !defined(_WIN32)
3612 const size_t PKT_ARRAY_SIZE
= cnt
;
3614 /* Sparse or MSVC doesn't like variable length array. */
3615 enum { PKT_ARRAY_SIZE
= NETDEV_MAX_BURST
};
3617 struct netdev_flow_key keys
[PKT_ARRAY_SIZE
];
3618 struct packet_batch batches
[PKT_ARRAY_SIZE
];
3619 long long now
= time_msec();
3620 size_t newcnt
, n_batches
, i
;
3623 newcnt
= emc_processing(pmd
, packets
, cnt
, keys
, batches
, &n_batches
,
3624 md_is_valid
, port_no
);
3625 if (OVS_UNLIKELY(newcnt
)) {
3626 fast_path_processing(pmd
, packets
, newcnt
, keys
, batches
, &n_batches
);
3629 for (i
= 0; i
< n_batches
; i
++) {
3630 batches
[i
].flow
->batch
= NULL
;
3633 for (i
= 0; i
< n_batches
; i
++) {
3634 packet_batch_execute(&batches
[i
], pmd
, now
);
3639 dp_netdev_input(struct dp_netdev_pmd_thread
*pmd
,
3640 struct dp_packet
**packets
, int cnt
,
3643 dp_netdev_input__(pmd
, packets
, cnt
, false, port_no
);
3647 dp_netdev_recirculate(struct dp_netdev_pmd_thread
*pmd
,
3648 struct dp_packet
**packets
, int cnt
)
3650 dp_netdev_input__(pmd
, packets
, cnt
, true, 0);
3653 struct dp_netdev_execute_aux
{
3654 struct dp_netdev_pmd_thread
*pmd
;
3658 dpif_netdev_register_dp_purge_cb(struct dpif
*dpif
, dp_purge_callback
*cb
,
3661 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
3662 dp
->dp_purge_aux
= aux
;
3663 dp
->dp_purge_cb
= cb
;
3667 dpif_netdev_register_upcall_cb(struct dpif
*dpif
, upcall_callback
*cb
,
3670 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
3671 dp
->upcall_aux
= aux
;
3676 dp_netdev_drop_packets(struct dp_packet
**packets
, int cnt
, bool may_steal
)
3681 for (i
= 0; i
< cnt
; i
++) {
3682 dp_packet_delete(packets
[i
]);
3688 push_tnl_action(const struct dp_netdev
*dp
,
3689 const struct nlattr
*attr
,
3690 struct dp_packet
**packets
, int cnt
)
3692 struct dp_netdev_port
*tun_port
;
3693 const struct ovs_action_push_tnl
*data
;
3695 data
= nl_attr_get(attr
);
3697 tun_port
= dp_netdev_lookup_port(dp
, u32_to_odp(data
->tnl_port
));
3701 netdev_push_header(tun_port
->netdev
, packets
, cnt
, data
);
3707 dp_netdev_clone_pkt_batch(struct dp_packet
**dst_pkts
,
3708 struct dp_packet
**src_pkts
, int cnt
)
3712 for (i
= 0; i
< cnt
; i
++) {
3713 dst_pkts
[i
] = dp_packet_clone(src_pkts
[i
]);
3718 dp_execute_cb(void *aux_
, struct dp_packet
**packets
, int cnt
,
3719 const struct nlattr
*a
, bool may_steal
)
3720 OVS_NO_THREAD_SAFETY_ANALYSIS
3722 struct dp_netdev_execute_aux
*aux
= aux_
;
3723 uint32_t *depth
= recirc_depth_get();
3724 struct dp_netdev_pmd_thread
*pmd
= aux
->pmd
;
3725 struct dp_netdev
*dp
= pmd
->dp
;
3726 int type
= nl_attr_type(a
);
3727 struct dp_netdev_port
*p
;
3730 switch ((enum ovs_action_attr
)type
) {
3731 case OVS_ACTION_ATTR_OUTPUT
:
3732 p
= dp_netdev_lookup_port(dp
, u32_to_odp(nl_attr_get_u32(a
)));
3733 if (OVS_LIKELY(p
)) {
3736 atomic_read_relaxed(&pmd
->tx_qid
, &tx_qid
);
3738 netdev_send(p
->netdev
, tx_qid
, packets
, cnt
, may_steal
);
3743 case OVS_ACTION_ATTR_TUNNEL_PUSH
:
3744 if (*depth
< MAX_RECIRC_DEPTH
) {
3745 struct dp_packet
*tnl_pkt
[NETDEV_MAX_BURST
];
3749 dp_netdev_clone_pkt_batch(tnl_pkt
, packets
, cnt
);
3753 err
= push_tnl_action(dp
, a
, packets
, cnt
);
3756 dp_netdev_recirculate(pmd
, packets
, cnt
);
3759 dp_netdev_drop_packets(tnl_pkt
, cnt
, !may_steal
);
3765 case OVS_ACTION_ATTR_TUNNEL_POP
:
3766 if (*depth
< MAX_RECIRC_DEPTH
) {
3767 odp_port_t portno
= u32_to_odp(nl_attr_get_u32(a
));
3769 p
= dp_netdev_lookup_port(dp
, portno
);
3771 struct dp_packet
*tnl_pkt
[NETDEV_MAX_BURST
];
3775 dp_netdev_clone_pkt_batch(tnl_pkt
, packets
, cnt
);
3779 err
= netdev_pop_header(p
->netdev
, packets
, cnt
);
3782 for (i
= 0; i
< cnt
; i
++) {
3783 packets
[i
]->md
.in_port
.odp_port
= portno
;
3787 dp_netdev_recirculate(pmd
, packets
, cnt
);
3790 dp_netdev_drop_packets(tnl_pkt
, cnt
, !may_steal
);
3797 case OVS_ACTION_ATTR_USERSPACE
:
3798 if (!fat_rwlock_tryrdlock(&dp
->upcall_rwlock
)) {
3799 const struct nlattr
*userdata
;
3800 struct ofpbuf actions
;
3804 userdata
= nl_attr_find_nested(a
, OVS_USERSPACE_ATTR_USERDATA
);
3805 ofpbuf_init(&actions
, 0);
3807 for (i
= 0; i
< cnt
; i
++) {
3810 ofpbuf_clear(&actions
);
3812 flow_extract(packets
[i
], &flow
);
3813 dpif_flow_hash(dp
->dpif
, &flow
, sizeof flow
, &ufid
);
3814 error
= dp_netdev_upcall(pmd
, packets
[i
], &flow
, NULL
, &ufid
,
3815 DPIF_UC_ACTION
, userdata
,&actions
,
3817 if (!error
|| error
== ENOSPC
) {
3818 dp_netdev_execute_actions(pmd
, &packets
[i
], 1, may_steal
,
3819 actions
.data
, actions
.size
);
3820 } else if (may_steal
) {
3821 dp_packet_delete(packets
[i
]);
3824 ofpbuf_uninit(&actions
);
3825 fat_rwlock_unlock(&dp
->upcall_rwlock
);
3831 case OVS_ACTION_ATTR_RECIRC
:
3832 if (*depth
< MAX_RECIRC_DEPTH
) {
3833 struct dp_packet
*recirc_pkts
[NETDEV_MAX_BURST
];
3836 dp_netdev_clone_pkt_batch(recirc_pkts
, packets
, cnt
);
3837 packets
= recirc_pkts
;
3840 for (i
= 0; i
< cnt
; i
++) {
3841 packets
[i
]->md
.recirc_id
= nl_attr_get_u32(a
);
3845 dp_netdev_recirculate(pmd
, packets
, cnt
);
3851 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3854 case OVS_ACTION_ATTR_CT
:
3855 /* If a flow with this action is slow-pathed, datapath assistance is
3856 * required to implement it. However, we don't support this action
3857 * in the userspace datapath. */
3858 VLOG_WARN("Cannot execute conntrack action in userspace.");
3861 case OVS_ACTION_ATTR_PUSH_VLAN
:
3862 case OVS_ACTION_ATTR_POP_VLAN
:
3863 case OVS_ACTION_ATTR_PUSH_MPLS
:
3864 case OVS_ACTION_ATTR_POP_MPLS
:
3865 case OVS_ACTION_ATTR_SET
:
3866 case OVS_ACTION_ATTR_SET_MASKED
:
3867 case OVS_ACTION_ATTR_SAMPLE
:
3868 case OVS_ACTION_ATTR_HASH
:
3869 case OVS_ACTION_ATTR_UNSPEC
:
3870 case __OVS_ACTION_ATTR_MAX
:
3874 dp_netdev_drop_packets(packets
, cnt
, may_steal
);
3878 dp_netdev_execute_actions(struct dp_netdev_pmd_thread
*pmd
,
3879 struct dp_packet
**packets
, int cnt
,
3881 const struct nlattr
*actions
, size_t actions_len
)
3883 struct dp_netdev_execute_aux aux
= { pmd
};
3885 odp_execute_actions(&aux
, packets
, cnt
, may_steal
, actions
,
3886 actions_len
, dp_execute_cb
);
3889 const struct dpif_class dpif_netdev_class
= {
3892 dpif_netdev_enumerate
,
3893 dpif_netdev_port_open_type
,
3896 dpif_netdev_destroy
,
3899 dpif_netdev_get_stats
,
3900 dpif_netdev_port_add
,
3901 dpif_netdev_port_del
,
3902 dpif_netdev_port_query_by_number
,
3903 dpif_netdev_port_query_by_name
,
3904 NULL
, /* port_get_pid */
3905 dpif_netdev_port_dump_start
,
3906 dpif_netdev_port_dump_next
,
3907 dpif_netdev_port_dump_done
,
3908 dpif_netdev_port_poll
,
3909 dpif_netdev_port_poll_wait
,
3910 dpif_netdev_flow_flush
,
3911 dpif_netdev_flow_dump_create
,
3912 dpif_netdev_flow_dump_destroy
,
3913 dpif_netdev_flow_dump_thread_create
,
3914 dpif_netdev_flow_dump_thread_destroy
,
3915 dpif_netdev_flow_dump_next
,
3916 dpif_netdev_operate
,
3917 NULL
, /* recv_set */
3918 NULL
, /* handlers_set */
3919 dpif_netdev_pmd_set
,
3920 dpif_netdev_queue_to_priority
,
3922 NULL
, /* recv_wait */
3923 NULL
, /* recv_purge */
3924 dpif_netdev_register_dp_purge_cb
,
3925 dpif_netdev_register_upcall_cb
,
3926 dpif_netdev_enable_upcall
,
3927 dpif_netdev_disable_upcall
,
3928 dpif_netdev_get_datapath_version
,
3929 NULL
, /* ct_dump_start */
3930 NULL
, /* ct_dump_next */
3931 NULL
, /* ct_dump_done */
3932 NULL
, /* ct_flush */
3936 dpif_dummy_change_port_number(struct unixctl_conn
*conn
, int argc OVS_UNUSED
,
3937 const char *argv
[], void *aux OVS_UNUSED
)
3939 struct dp_netdev_port
*old_port
;
3940 struct dp_netdev_port
*new_port
;
3941 struct dp_netdev
*dp
;
3944 ovs_mutex_lock(&dp_netdev_mutex
);
3945 dp
= shash_find_data(&dp_netdevs
, argv
[1]);
3946 if (!dp
|| !dpif_netdev_class_is_dummy(dp
->class)) {
3947 ovs_mutex_unlock(&dp_netdev_mutex
);
3948 unixctl_command_reply_error(conn
, "unknown datapath or not a dummy");
3951 ovs_refcount_ref(&dp
->ref_cnt
);
3952 ovs_mutex_unlock(&dp_netdev_mutex
);
3954 ovs_mutex_lock(&dp
->port_mutex
);
3955 if (get_port_by_name(dp
, argv
[2], &old_port
)) {
3956 unixctl_command_reply_error(conn
, "unknown port");
3960 port_no
= u32_to_odp(atoi(argv
[3]));
3961 if (!port_no
|| port_no
== ODPP_NONE
) {
3962 unixctl_command_reply_error(conn
, "bad port number");
3965 if (dp_netdev_lookup_port(dp
, port_no
)) {
3966 unixctl_command_reply_error(conn
, "port number already in use");
3970 /* Remove old port. */
3971 cmap_remove(&dp
->ports
, &old_port
->node
, hash_port_no(old_port
->port_no
));
3972 ovsrcu_postpone(free
, old_port
);
3974 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3975 new_port
= xmemdup(old_port
, sizeof *old_port
);
3976 new_port
->port_no
= port_no
;
3977 cmap_insert(&dp
->ports
, &new_port
->node
, hash_port_no(port_no
));
3979 seq_change(dp
->port_seq
);
3980 unixctl_command_reply(conn
, NULL
);
3983 ovs_mutex_unlock(&dp
->port_mutex
);
3984 dp_netdev_unref(dp
);
3988 dpif_dummy_register__(const char *type
)
3990 struct dpif_class
*class;
3992 class = xmalloc(sizeof *class);
3993 *class = dpif_netdev_class
;
3994 class->type
= xstrdup(type
);
3995 dp_register_provider(class);
3999 dpif_dummy_override(const char *type
)
4004 * Ignore EAFNOSUPPORT to allow --enable-dummy=system with
4005 * a userland-only build. It's useful for testsuite.
4007 error
= dp_unregister_provider(type
);
4008 if (error
== 0 || error
== EAFNOSUPPORT
) {
4009 dpif_dummy_register__(type
);
4014 dpif_dummy_register(enum dummy_level level
)
4016 if (level
== DUMMY_OVERRIDE_ALL
) {
4021 dp_enumerate_types(&types
);
4022 SSET_FOR_EACH (type
, &types
) {
4023 dpif_dummy_override(type
);
4025 sset_destroy(&types
);
4026 } else if (level
== DUMMY_OVERRIDE_SYSTEM
) {
4027 dpif_dummy_override("system");
4030 dpif_dummy_register__("dummy");
4032 unixctl_command_register("dpif-dummy/change-port-number",
4033 "dp port new-number",
4034 3, 3, dpif_dummy_change_port_number
, NULL
);
4037 /* Datapath Classifier. */
4039 /* A set of rules that all have the same fields wildcarded. */
4040 struct dpcls_subtable
{
4041 /* The fields are only used by writers. */
4042 struct cmap_node cmap_node OVS_GUARDED
; /* Within dpcls 'subtables_map'. */
4044 /* These fields are accessed by readers. */
4045 struct cmap rules
; /* Contains "struct dpcls_rule"s. */
4046 struct netdev_flow_key mask
; /* Wildcards for fields (const). */
4047 /* 'mask' must be the last field, additional space is allocated here. */
4050 /* Initializes 'cls' as a classifier that initially contains no classification
4053 dpcls_init(struct dpcls
*cls
)
4055 cmap_init(&cls
->subtables_map
);
4056 pvector_init(&cls
->subtables
);
4060 dpcls_destroy_subtable(struct dpcls
*cls
, struct dpcls_subtable
*subtable
)
4062 pvector_remove(&cls
->subtables
, subtable
);
4063 cmap_remove(&cls
->subtables_map
, &subtable
->cmap_node
,
4064 subtable
->mask
.hash
);
4065 cmap_destroy(&subtable
->rules
);
4066 ovsrcu_postpone(free
, subtable
);
4069 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
4070 * caller's responsibility.
4071 * May only be called after all the readers have been terminated. */
4073 dpcls_destroy(struct dpcls
*cls
)
4076 struct dpcls_subtable
*subtable
;
4078 CMAP_FOR_EACH (subtable
, cmap_node
, &cls
->subtables_map
) {
4079 ovs_assert(cmap_count(&subtable
->rules
) == 0);
4080 dpcls_destroy_subtable(cls
, subtable
);
4082 cmap_destroy(&cls
->subtables_map
);
4083 pvector_destroy(&cls
->subtables
);
4087 static struct dpcls_subtable
*
4088 dpcls_create_subtable(struct dpcls
*cls
, const struct netdev_flow_key
*mask
)
4090 struct dpcls_subtable
*subtable
;
4092 /* Need to add one. */
4093 subtable
= xmalloc(sizeof *subtable
4094 - sizeof subtable
->mask
.mf
+ mask
->len
);
4095 cmap_init(&subtable
->rules
);
4096 netdev_flow_key_clone(&subtable
->mask
, mask
);
4097 cmap_insert(&cls
->subtables_map
, &subtable
->cmap_node
, mask
->hash
);
4098 pvector_insert(&cls
->subtables
, subtable
, 0);
4099 pvector_publish(&cls
->subtables
);
4104 static inline struct dpcls_subtable
*
4105 dpcls_find_subtable(struct dpcls
*cls
, const struct netdev_flow_key
*mask
)
4107 struct dpcls_subtable
*subtable
;
4109 CMAP_FOR_EACH_WITH_HASH (subtable
, cmap_node
, mask
->hash
,
4110 &cls
->subtables_map
) {
4111 if (netdev_flow_key_equal(&subtable
->mask
, mask
)) {
4115 return dpcls_create_subtable(cls
, mask
);
4118 /* Insert 'rule' into 'cls'. */
4120 dpcls_insert(struct dpcls
*cls
, struct dpcls_rule
*rule
,
4121 const struct netdev_flow_key
*mask
)
4123 struct dpcls_subtable
*subtable
= dpcls_find_subtable(cls
, mask
);
4125 rule
->mask
= &subtable
->mask
;
4126 cmap_insert(&subtable
->rules
, &rule
->cmap_node
, rule
->flow
.hash
);
4129 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
4131 dpcls_remove(struct dpcls
*cls
, struct dpcls_rule
*rule
)
4133 struct dpcls_subtable
*subtable
;
4135 ovs_assert(rule
->mask
);
4137 INIT_CONTAINER(subtable
, rule
->mask
, mask
);
4139 if (cmap_remove(&subtable
->rules
, &rule
->cmap_node
, rule
->flow
.hash
)
4141 dpcls_destroy_subtable(cls
, subtable
);
4142 pvector_publish(&cls
->subtables
);
4146 /* Returns true if 'target' satisfies 'key' in 'mask', that is, if each 1-bit
4147 * in 'mask' the values in 'key' and 'target' are the same. */
4149 dpcls_rule_matches_key(const struct dpcls_rule
*rule
,
4150 const struct netdev_flow_key
*target
)
4152 const uint64_t *keyp
= miniflow_get_values(&rule
->flow
.mf
);
4153 const uint64_t *maskp
= miniflow_get_values(&rule
->mask
->mf
);
4156 NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value
, target
, rule
->flow
.mf
.map
) {
4157 if (OVS_UNLIKELY((value
& *maskp
++) != *keyp
++)) {
4164 /* For each miniflow in 'flows' performs a classifier lookup writing the result
4165 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
4166 * NULL it is skipped.
4168 * This function is optimized for use in the userspace datapath and therefore
4169 * does not implement a lot of features available in the standard
4170 * classifier_lookup() function. Specifically, it does not implement
4171 * priorities, instead returning any rule which matches the flow.
4173 * Returns true if all flows found a corresponding rule. */
4175 dpcls_lookup(const struct dpcls
*cls
, const struct netdev_flow_key keys
[],
4176 struct dpcls_rule
**rules
, const size_t cnt
)
4178 /* The batch size 16 was experimentally found faster than 8 or 32. */
4179 typedef uint16_t map_type
;
4180 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
4182 #if !defined(__CHECKER__) && !defined(_WIN32)
4183 const int N_MAPS
= DIV_ROUND_UP(cnt
, MAP_BITS
);
4185 enum { N_MAPS
= DIV_ROUND_UP(NETDEV_MAX_BURST
, MAP_BITS
) };
4187 map_type maps
[N_MAPS
];
4188 struct dpcls_subtable
*subtable
;
4190 memset(maps
, 0xff, sizeof maps
);
4191 if (cnt
% MAP_BITS
) {
4192 maps
[N_MAPS
- 1] >>= MAP_BITS
- cnt
% MAP_BITS
; /* Clear extra bits. */
4194 memset(rules
, 0, cnt
* sizeof *rules
);
4196 PVECTOR_FOR_EACH (subtable
, &cls
->subtables
) {
4197 const struct netdev_flow_key
*mkeys
= keys
;
4198 struct dpcls_rule
**mrules
= rules
;
4199 map_type remains
= 0;
4202 BUILD_ASSERT_DECL(sizeof remains
== sizeof *maps
);
4204 for (m
= 0; m
< N_MAPS
; m
++, mkeys
+= MAP_BITS
, mrules
+= MAP_BITS
) {
4205 uint32_t hashes
[MAP_BITS
];
4206 const struct cmap_node
*nodes
[MAP_BITS
];
4207 unsigned long map
= maps
[m
];
4211 continue; /* Skip empty maps. */
4214 /* Compute hashes for the remaining keys. */
4215 ULLONG_FOR_EACH_1(i
, map
) {
4216 hashes
[i
] = netdev_flow_key_hash_in_mask(&mkeys
[i
],
4220 map
= cmap_find_batch(&subtable
->rules
, map
, hashes
, nodes
);
4221 /* Check results. */
4222 ULLONG_FOR_EACH_1(i
, map
) {
4223 struct dpcls_rule
*rule
;
4225 CMAP_NODE_FOR_EACH (rule
, cmap_node
, nodes
[i
]) {
4226 if (OVS_LIKELY(dpcls_rule_matches_key(rule
, &mkeys
[i
]))) {
4231 ULLONG_SET0(map
, i
); /* Did not match. */
4233 ; /* Keep Sparse happy. */
4235 maps
[m
] &= ~map
; /* Clear the found rules. */
4239 return true; /* All found. */
4242 return false; /* Some misses. */