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 "fat-rwlock.h"
47 #include "netdev-dpdk.h"
48 #include "netdev-vport.h"
50 #include "odp-execute.h"
52 #include "openvswitch/dynamic-string.h"
53 #include "openvswitch/list.h"
54 #include "openvswitch/match.h"
55 #include "openvswitch/ofp-print.h"
56 #include "openvswitch/ofpbuf.h"
57 #include "openvswitch/vlog.h"
61 #include "poll-loop.h"
68 #include "tnl-neigh-cache.h"
69 #include "tnl-ports.h"
73 VLOG_DEFINE_THIS_MODULE(dpif_netdev
);
75 #define FLOW_DUMP_MAX_BATCH 50
76 /* Use per thread recirc_depth to prevent recirculation loop. */
77 #define MAX_RECIRC_DEPTH 5
78 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth
, 0)
80 /* Configuration parameters. */
81 enum { MAX_FLOWS
= 65536 }; /* Maximum number of flows in flow table. */
83 /* Protects against changes to 'dp_netdevs'. */
84 static struct ovs_mutex dp_netdev_mutex
= OVS_MUTEX_INITIALIZER
;
86 /* Contains all 'struct dp_netdev's. */
87 static struct shash dp_netdevs
OVS_GUARDED_BY(dp_netdev_mutex
)
88 = SHASH_INITIALIZER(&dp_netdevs
);
90 static struct vlog_rate_limit upcall_rl
= VLOG_RATE_LIMIT_INIT(600, 600);
92 static struct odp_support dp_netdev_support
= {
93 .max_mpls_depth
= SIZE_MAX
,
97 /* Stores a miniflow with inline values */
99 struct netdev_flow_key
{
100 uint32_t hash
; /* Hash function differs for different users. */
101 uint32_t len
; /* Length of the following miniflow (incl. map). */
103 uint64_t buf
[FLOW_MAX_PACKET_U64S
];
106 /* Exact match cache for frequently used flows
108 * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
109 * search its entries for a miniflow that matches exactly the miniflow of the
110 * packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
112 * A cache entry holds a reference to its 'dp_netdev_flow'.
114 * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
115 * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
116 * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
117 * value is the index of a cache entry where the miniflow could be.
123 * Each pmd_thread has its own private exact match cache.
124 * If dp_netdev_input is not called from a pmd thread, a mutex is used.
127 #define EM_FLOW_HASH_SHIFT 13
128 #define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
129 #define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
130 #define EM_FLOW_HASH_SEGS 2
133 struct dp_netdev_flow
*flow
;
134 struct netdev_flow_key key
; /* key.hash used for emc hash value. */
138 struct emc_entry entries
[EM_FLOW_HASH_ENTRIES
];
139 int sweep_idx
; /* For emc_cache_slow_sweep(). */
142 /* Iterate in the exact match cache through every entry that might contain a
143 * miniflow with hash 'HASH'. */
144 #define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
145 for (uint32_t i__ = 0, srch_hash__ = (HASH); \
146 (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
147 i__ < EM_FLOW_HASH_SEGS; \
148 i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
150 /* Simple non-wildcarding single-priority classifier. */
153 struct cmap subtables_map
;
154 struct pvector subtables
;
157 /* A rule to be inserted to the classifier. */
159 struct cmap_node cmap_node
; /* Within struct dpcls_subtable 'rules'. */
160 struct netdev_flow_key
*mask
; /* Subtable's mask. */
161 struct netdev_flow_key flow
; /* Matching key. */
162 /* 'flow' must be the last field, additional space is allocated here. */
165 static void dpcls_init(struct dpcls
*);
166 static void dpcls_destroy(struct dpcls
*);
167 static void dpcls_insert(struct dpcls
*, struct dpcls_rule
*,
168 const struct netdev_flow_key
*mask
);
169 static void dpcls_remove(struct dpcls
*, struct dpcls_rule
*);
170 static bool dpcls_lookup(const struct dpcls
*cls
,
171 const struct netdev_flow_key keys
[],
172 struct dpcls_rule
**rules
, size_t cnt
);
174 /* Datapath based on the network device interface from netdev.h.
180 * Some members, marked 'const', are immutable. Accessing other members
181 * requires synchronization, as noted in more detail below.
183 * Acquisition order is, from outermost to innermost:
185 * dp_netdev_mutex (global)
189 const struct dpif_class
*const class;
190 const char *const name
;
192 struct ovs_refcount ref_cnt
;
193 atomic_flag destroyed
;
197 * Protected by RCU. Take the mutex to add or remove ports. */
198 struct ovs_mutex port_mutex
;
200 struct seq
*port_seq
; /* Incremented whenever a port changes. */
202 /* Protects access to ofproto-dpif-upcall interface during revalidator
203 * thread synchronization. */
204 struct fat_rwlock upcall_rwlock
;
205 upcall_callback
*upcall_cb
; /* Callback function for executing upcalls. */
208 /* Callback function for notifying the purging of dp flows (during
209 * reseting pmd deletion). */
210 dp_purge_callback
*dp_purge_cb
;
213 /* Stores all 'struct dp_netdev_pmd_thread's. */
214 struct cmap poll_threads
;
216 /* Protects the access of the 'struct dp_netdev_pmd_thread'
217 * instance for non-pmd thread. */
218 struct ovs_mutex non_pmd_mutex
;
220 /* Each pmd thread will store its pointer to
221 * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
222 ovsthread_key_t per_pmd_key
;
224 /* Cpu mask for pin of pmd threads. */
226 uint64_t last_tnl_conf_seq
;
229 static struct dp_netdev_port
*dp_netdev_lookup_port(const struct dp_netdev
*dp
,
233 DP_STAT_EXACT_HIT
, /* Packets that had an exact match (emc). */
234 DP_STAT_MASKED_HIT
, /* Packets that matched in the flow table. */
235 DP_STAT_MISS
, /* Packets that did not match. */
236 DP_STAT_LOST
, /* Packets not passed up to the client. */
240 enum pmd_cycles_counter_type
{
241 PMD_CYCLES_POLLING
, /* Cycles spent polling NICs. */
242 PMD_CYCLES_PROCESSING
, /* Cycles spent processing packets */
246 /* A port in a netdev-based datapath. */
247 struct dp_netdev_port
{
249 struct netdev
*netdev
;
250 struct cmap_node node
; /* Node in dp_netdev's 'ports'. */
251 struct netdev_saved_flags
*sf
;
252 unsigned n_rxq
; /* Number of elements in 'rxq' */
253 struct netdev_rxq
**rxq
;
254 char *type
; /* Port type as requested by user. */
255 int latest_requested_n_rxq
; /* Latest requested from netdev number
259 /* Contained by struct dp_netdev_flow's 'stats' member. */
260 struct dp_netdev_flow_stats
{
261 atomic_llong used
; /* Last used time, in monotonic msecs. */
262 atomic_ullong packet_count
; /* Number of packets matched. */
263 atomic_ullong byte_count
; /* Number of bytes matched. */
264 atomic_uint16_t tcp_flags
; /* Bitwise-OR of seen tcp_flags values. */
267 /* A flow in 'dp_netdev_pmd_thread's 'flow_table'.
273 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
274 * its pmd thread's classifier. The text below calls this classifier 'cls'.
279 * The thread safety rules described here for "struct dp_netdev_flow" are
280 * motivated by two goals:
282 * - Prevent threads that read members of "struct dp_netdev_flow" from
283 * reading bad data due to changes by some thread concurrently modifying
286 * - Prevent two threads making changes to members of a given "struct
287 * dp_netdev_flow" from interfering with each other.
293 * A flow 'flow' may be accessed without a risk of being freed during an RCU
294 * grace period. Code that needs to hold onto a flow for a while
295 * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
297 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
298 * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
301 * Some members, marked 'const', are immutable. Accessing other members
302 * requires synchronization, as noted in more detail below.
304 struct dp_netdev_flow
{
305 const struct flow flow
; /* Unmasked flow that created this entry. */
306 /* Hash table index by unmasked flow. */
307 const struct cmap_node node
; /* In owning dp_netdev_pmd_thread's */
309 const ovs_u128 ufid
; /* Unique flow identifier. */
310 const unsigned pmd_id
; /* The 'core_id' of pmd thread owning this */
313 /* Number of references.
314 * The classifier owns one reference.
315 * Any thread trying to keep a rule from being freed should hold its own
317 struct ovs_refcount ref_cnt
;
322 struct dp_netdev_flow_stats stats
;
325 OVSRCU_TYPE(struct dp_netdev_actions
*) actions
;
327 /* While processing a group of input packets, the datapath uses the next
328 * member to store a pointer to the output batch for the flow. It is
329 * reset after the batch has been sent out (See dp_netdev_queue_batches(),
330 * packet_batch_init() and packet_batch_execute()). */
331 struct packet_batch
*batch
;
333 /* Packet classification. */
334 struct dpcls_rule cr
; /* In owning dp_netdev's 'cls'. */
335 /* 'cr' must be the last member. */
338 static void dp_netdev_flow_unref(struct dp_netdev_flow
*);
339 static bool dp_netdev_flow_ref(struct dp_netdev_flow
*);
340 static int dpif_netdev_flow_from_nlattrs(const struct nlattr
*, uint32_t,
343 /* A set of datapath actions within a "struct dp_netdev_flow".
349 * A struct dp_netdev_actions 'actions' is protected with RCU. */
350 struct dp_netdev_actions
{
351 /* These members are immutable: they do not change during the struct's
353 unsigned int size
; /* Size of 'actions', in bytes. */
354 struct nlattr actions
[]; /* Sequence of OVS_ACTION_ATTR_* attributes. */
357 struct dp_netdev_actions
*dp_netdev_actions_create(const struct nlattr
*,
359 struct dp_netdev_actions
*dp_netdev_flow_get_actions(
360 const struct dp_netdev_flow
*);
361 static void dp_netdev_actions_free(struct dp_netdev_actions
*);
363 /* Contained by struct dp_netdev_pmd_thread's 'stats' member. */
364 struct dp_netdev_pmd_stats
{
365 /* Indexed by DP_STAT_*. */
366 atomic_ullong n
[DP_N_STATS
];
369 /* Contained by struct dp_netdev_pmd_thread's 'cycle' member. */
370 struct dp_netdev_pmd_cycles
{
371 /* Indexed by PMD_CYCLES_*. */
372 atomic_ullong n
[PMD_N_CYCLES
];
375 /* Contained by struct dp_netdev_pmd_thread's 'poll_list' member. */
377 struct dp_netdev_port
*port
;
378 struct netdev_rxq
*rx
;
379 struct ovs_list node
;
382 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
383 * the performance overhead of interrupt processing. Therefore netdev can
384 * not implement rx-wait for these devices. dpif-netdev needs to poll
385 * these device to check for recv buffer. pmd-thread does polling for
386 * devices assigned to itself.
388 * DPDK used PMD for accessing NIC.
390 * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
391 * I/O of all non-pmd threads. There will be no actual thread created
394 * Each struct has its own flow table and classifier. Packets received
395 * from managed ports are looked up in the corresponding pmd thread's
396 * flow table, and are executed with the found actions.
398 struct dp_netdev_pmd_thread
{
399 struct dp_netdev
*dp
;
400 struct ovs_refcount ref_cnt
; /* Every reference must be refcount'ed. */
401 struct cmap_node node
; /* In 'dp->poll_threads'. */
403 pthread_cond_t cond
; /* For synchronizing pmd thread reload. */
404 struct ovs_mutex cond_mutex
; /* Mutex for condition variable. */
406 /* Per thread exact-match cache. Note, the instance for cpu core
407 * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
408 * need to be protected (e.g. by 'dp_netdev_mutex'). All other
409 * instances will only be accessed by its own pmd thread. */
410 struct emc_cache flow_cache
;
412 /* Classifier and Flow-Table.
414 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
415 * changes to 'cls' must be made while still holding the 'flow_mutex'.
417 struct ovs_mutex flow_mutex
;
419 struct cmap flow_table OVS_GUARDED
; /* Flow table. */
422 struct dp_netdev_pmd_stats stats
;
424 /* Cycles counters */
425 struct dp_netdev_pmd_cycles cycles
;
427 /* Used to count cicles. See 'cycles_counter_end()' */
428 unsigned long long last_cycles
;
430 struct latch exit_latch
; /* For terminating the pmd thread. */
431 atomic_uint change_seq
; /* For reloading pmd ports. */
433 int index
; /* Idx of this pmd thread among pmd*/
434 /* threads on same numa node. */
435 unsigned core_id
; /* CPU core id of this pmd thread. */
436 int numa_id
; /* numa node id of this pmd thread. */
437 atomic_int tx_qid
; /* Queue id used by this pmd thread to
438 * send packets on all netdevs */
440 struct ovs_mutex poll_mutex
; /* Mutex for poll_list. */
441 /* List of rx queues to poll. */
442 struct ovs_list poll_list OVS_GUARDED
;
443 int poll_cnt
; /* Number of elemints in poll_list. */
445 /* Only a pmd thread can write on its own 'cycles' and 'stats'.
446 * The main thread keeps 'stats_zero' and 'cycles_zero' as base
447 * values and subtracts them from 'stats' and 'cycles' before
448 * reporting to the user */
449 unsigned long long stats_zero
[DP_N_STATS
];
450 uint64_t cycles_zero
[PMD_N_CYCLES
];
453 #define PMD_INITIAL_SEQ 1
455 /* Interface to netdev-based datapath. */
458 struct dp_netdev
*dp
;
459 uint64_t last_port_seq
;
462 static int get_port_by_number(struct dp_netdev
*dp
, odp_port_t port_no
,
463 struct dp_netdev_port
**portp
);
464 static int get_port_by_name(struct dp_netdev
*dp
, const char *devname
,
465 struct dp_netdev_port
**portp
);
466 static void dp_netdev_free(struct dp_netdev
*)
467 OVS_REQUIRES(dp_netdev_mutex
);
468 static int do_add_port(struct dp_netdev
*dp
, const char *devname
,
469 const char *type
, odp_port_t port_no
)
470 OVS_REQUIRES(dp
->port_mutex
);
471 static void do_del_port(struct dp_netdev
*dp
, struct dp_netdev_port
*)
472 OVS_REQUIRES(dp
->port_mutex
);
473 static int dpif_netdev_open(const struct dpif_class
*, const char *name
,
474 bool create
, struct dpif
**);
475 static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread
*pmd
,
476 struct dp_packet
**, int c
,
478 const struct nlattr
*actions
,
480 static void dp_netdev_input(struct dp_netdev_pmd_thread
*,
481 struct dp_packet
**, int cnt
, odp_port_t port_no
);
482 static void dp_netdev_recirculate(struct dp_netdev_pmd_thread
*,
483 struct dp_packet
**, int cnt
);
485 static void dp_netdev_disable_upcall(struct dp_netdev
*);
486 static void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread
*pmd
);
487 static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread
*pmd
,
488 struct dp_netdev
*dp
, int index
,
489 unsigned core_id
, int numa_id
);
490 static void dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread
*pmd
);
491 static void dp_netdev_set_nonpmd(struct dp_netdev
*dp
);
492 static struct dp_netdev_pmd_thread
*dp_netdev_get_pmd(struct dp_netdev
*dp
,
494 static struct dp_netdev_pmd_thread
*
495 dp_netdev_pmd_get_next(struct dp_netdev
*dp
, struct cmap_position
*pos
);
496 static void dp_netdev_destroy_all_pmds(struct dp_netdev
*dp
);
497 static void dp_netdev_del_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
);
498 static void dp_netdev_set_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
);
499 static void dp_netdev_pmd_clear_poll_list(struct dp_netdev_pmd_thread
*pmd
);
500 static void dp_netdev_del_port_from_pmd(struct dp_netdev_port
*port
,
501 struct dp_netdev_pmd_thread
*pmd
);
502 static void dp_netdev_del_port_from_all_pmds(struct dp_netdev
*dp
,
503 struct dp_netdev_port
*port
);
505 dp_netdev_add_port_to_pmds(struct dp_netdev
*dp
, struct dp_netdev_port
*port
);
507 dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread
*pmd
,
508 struct dp_netdev_port
*port
, struct netdev_rxq
*rx
);
509 static struct dp_netdev_pmd_thread
*
510 dp_netdev_less_loaded_pmd_on_numa(struct dp_netdev
*dp
, int numa_id
);
511 static void dp_netdev_reset_pmd_threads(struct dp_netdev
*dp
);
512 static bool dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread
*pmd
);
513 static void dp_netdev_pmd_unref(struct dp_netdev_pmd_thread
*pmd
);
514 static void dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread
*pmd
);
516 static inline bool emc_entry_alive(struct emc_entry
*ce
);
517 static void emc_clear_entry(struct emc_entry
*ce
);
520 emc_cache_init(struct emc_cache
*flow_cache
)
524 flow_cache
->sweep_idx
= 0;
525 for (i
= 0; i
< ARRAY_SIZE(flow_cache
->entries
); i
++) {
526 flow_cache
->entries
[i
].flow
= NULL
;
527 flow_cache
->entries
[i
].key
.hash
= 0;
528 flow_cache
->entries
[i
].key
.len
= sizeof(struct miniflow
);
529 flowmap_init(&flow_cache
->entries
[i
].key
.mf
.map
);
534 emc_cache_uninit(struct emc_cache
*flow_cache
)
538 for (i
= 0; i
< ARRAY_SIZE(flow_cache
->entries
); i
++) {
539 emc_clear_entry(&flow_cache
->entries
[i
]);
543 /* Check and clear dead flow references slowly (one entry at each
546 emc_cache_slow_sweep(struct emc_cache
*flow_cache
)
548 struct emc_entry
*entry
= &flow_cache
->entries
[flow_cache
->sweep_idx
];
550 if (!emc_entry_alive(entry
)) {
551 emc_clear_entry(entry
);
553 flow_cache
->sweep_idx
= (flow_cache
->sweep_idx
+ 1) & EM_FLOW_HASH_MASK
;
556 /* Returns true if 'dpif' is a netdev or dummy dpif, false otherwise. */
558 dpif_is_netdev(const struct dpif
*dpif
)
560 return dpif
->dpif_class
->open
== dpif_netdev_open
;
563 static struct dpif_netdev
*
564 dpif_netdev_cast(const struct dpif
*dpif
)
566 ovs_assert(dpif_is_netdev(dpif
));
567 return CONTAINER_OF(dpif
, struct dpif_netdev
, dpif
);
570 static struct dp_netdev
*
571 get_dp_netdev(const struct dpif
*dpif
)
573 return dpif_netdev_cast(dpif
)->dp
;
577 PMD_INFO_SHOW_STATS
, /* Show how cpu cycles are spent. */
578 PMD_INFO_CLEAR_STATS
, /* Set the cycles count to 0. */
579 PMD_INFO_SHOW_RXQ
/* Show poll-lists of pmd threads. */
583 pmd_info_show_stats(struct ds
*reply
,
584 struct dp_netdev_pmd_thread
*pmd
,
585 unsigned long long stats
[DP_N_STATS
],
586 uint64_t cycles
[PMD_N_CYCLES
])
588 unsigned long long total_packets
= 0;
589 uint64_t total_cycles
= 0;
592 /* These loops subtracts reference values ('*_zero') from the counters.
593 * Since loads and stores are relaxed, it might be possible for a '*_zero'
594 * value to be more recent than the current value we're reading from the
595 * counter. This is not a big problem, since these numbers are not
596 * supposed to be too accurate, but we should at least make sure that
597 * the result is not negative. */
598 for (i
= 0; i
< DP_N_STATS
; i
++) {
599 if (stats
[i
] > pmd
->stats_zero
[i
]) {
600 stats
[i
] -= pmd
->stats_zero
[i
];
605 if (i
!= DP_STAT_LOST
) {
606 /* Lost packets are already included in DP_STAT_MISS */
607 total_packets
+= stats
[i
];
611 for (i
= 0; i
< PMD_N_CYCLES
; i
++) {
612 if (cycles
[i
] > pmd
->cycles_zero
[i
]) {
613 cycles
[i
] -= pmd
->cycles_zero
[i
];
618 total_cycles
+= cycles
[i
];
621 ds_put_cstr(reply
, (pmd
->core_id
== NON_PMD_CORE_ID
)
622 ? "main thread" : "pmd thread");
624 if (pmd
->numa_id
!= OVS_NUMA_UNSPEC
) {
625 ds_put_format(reply
, " numa_id %d", pmd
->numa_id
);
627 if (pmd
->core_id
!= OVS_CORE_UNSPEC
&& pmd
->core_id
!= NON_PMD_CORE_ID
) {
628 ds_put_format(reply
, " core_id %u", pmd
->core_id
);
630 ds_put_cstr(reply
, ":\n");
633 "\temc hits:%llu\n\tmegaflow hits:%llu\n"
634 "\tmiss:%llu\n\tlost:%llu\n",
635 stats
[DP_STAT_EXACT_HIT
], stats
[DP_STAT_MASKED_HIT
],
636 stats
[DP_STAT_MISS
], stats
[DP_STAT_LOST
]);
638 if (total_cycles
== 0) {
643 "\tpolling cycles:%"PRIu64
" (%.02f%%)\n"
644 "\tprocessing cycles:%"PRIu64
" (%.02f%%)\n",
645 cycles
[PMD_CYCLES_POLLING
],
646 cycles
[PMD_CYCLES_POLLING
] / (double)total_cycles
* 100,
647 cycles
[PMD_CYCLES_PROCESSING
],
648 cycles
[PMD_CYCLES_PROCESSING
] / (double)total_cycles
* 100);
650 if (total_packets
== 0) {
655 "\tavg cycles per packet: %.02f (%"PRIu64
"/%llu)\n",
656 total_cycles
/ (double)total_packets
,
657 total_cycles
, total_packets
);
660 "\tavg processing cycles per packet: "
661 "%.02f (%"PRIu64
"/%llu)\n",
662 cycles
[PMD_CYCLES_PROCESSING
] / (double)total_packets
,
663 cycles
[PMD_CYCLES_PROCESSING
], total_packets
);
667 pmd_info_clear_stats(struct ds
*reply OVS_UNUSED
,
668 struct dp_netdev_pmd_thread
*pmd
,
669 unsigned long long stats
[DP_N_STATS
],
670 uint64_t cycles
[PMD_N_CYCLES
])
674 /* We cannot write 'stats' and 'cycles' (because they're written by other
675 * threads) and we shouldn't change 'stats' (because they're used to count
676 * datapath stats, which must not be cleared here). Instead, we save the
677 * current values and subtract them from the values to be displayed in the
679 for (i
= 0; i
< DP_N_STATS
; i
++) {
680 pmd
->stats_zero
[i
] = stats
[i
];
682 for (i
= 0; i
< PMD_N_CYCLES
; i
++) {
683 pmd
->cycles_zero
[i
] = cycles
[i
];
688 pmd_info_show_rxq(struct ds
*reply
, struct dp_netdev_pmd_thread
*pmd
)
690 if (pmd
->core_id
!= NON_PMD_CORE_ID
) {
691 struct rxq_poll
*poll
;
692 const char *prev_name
= NULL
;
694 ds_put_format(reply
, "pmd thread numa_id %d core_id %u:\n",
695 pmd
->numa_id
, pmd
->core_id
);
697 ovs_mutex_lock(&pmd
->poll_mutex
);
698 LIST_FOR_EACH (poll
, node
, &pmd
->poll_list
) {
699 const char *name
= netdev_get_name(poll
->port
->netdev
);
701 if (!prev_name
|| strcmp(name
, prev_name
)) {
703 ds_put_cstr(reply
, "\n");
705 ds_put_format(reply
, "\tport: %s\tqueue-id:",
706 netdev_get_name(poll
->port
->netdev
));
708 ds_put_format(reply
, " %d", netdev_rxq_get_queue_id(poll
->rx
));
711 ovs_mutex_unlock(&pmd
->poll_mutex
);
712 ds_put_cstr(reply
, "\n");
717 dpif_netdev_pmd_info(struct unixctl_conn
*conn
, int argc
, const char *argv
[],
720 struct ds reply
= DS_EMPTY_INITIALIZER
;
721 struct dp_netdev_pmd_thread
*pmd
;
722 struct dp_netdev
*dp
= NULL
;
723 enum pmd_info_type type
= *(enum pmd_info_type
*) aux
;
725 ovs_mutex_lock(&dp_netdev_mutex
);
728 dp
= shash_find_data(&dp_netdevs
, argv
[1]);
729 } else if (shash_count(&dp_netdevs
) == 1) {
730 /* There's only one datapath */
731 dp
= shash_first(&dp_netdevs
)->data
;
735 ovs_mutex_unlock(&dp_netdev_mutex
);
736 unixctl_command_reply_error(conn
,
737 "please specify an existing datapath");
741 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
742 if (type
== PMD_INFO_SHOW_RXQ
) {
743 pmd_info_show_rxq(&reply
, pmd
);
745 unsigned long long stats
[DP_N_STATS
];
746 uint64_t cycles
[PMD_N_CYCLES
];
749 /* Read current stats and cycle counters */
750 for (i
= 0; i
< ARRAY_SIZE(stats
); i
++) {
751 atomic_read_relaxed(&pmd
->stats
.n
[i
], &stats
[i
]);
753 for (i
= 0; i
< ARRAY_SIZE(cycles
); i
++) {
754 atomic_read_relaxed(&pmd
->cycles
.n
[i
], &cycles
[i
]);
757 if (type
== PMD_INFO_CLEAR_STATS
) {
758 pmd_info_clear_stats(&reply
, pmd
, stats
, cycles
);
759 } else if (type
== PMD_INFO_SHOW_STATS
) {
760 pmd_info_show_stats(&reply
, pmd
, stats
, cycles
);
765 ovs_mutex_unlock(&dp_netdev_mutex
);
767 unixctl_command_reply(conn
, ds_cstr(&reply
));
772 dpif_netdev_init(void)
774 static enum pmd_info_type show_aux
= PMD_INFO_SHOW_STATS
,
775 clear_aux
= PMD_INFO_CLEAR_STATS
,
776 poll_aux
= PMD_INFO_SHOW_RXQ
;
778 unixctl_command_register("dpif-netdev/pmd-stats-show", "[dp]",
779 0, 1, dpif_netdev_pmd_info
,
781 unixctl_command_register("dpif-netdev/pmd-stats-clear", "[dp]",
782 0, 1, dpif_netdev_pmd_info
,
784 unixctl_command_register("dpif-netdev/pmd-rxq-show", "[dp]",
785 0, 1, dpif_netdev_pmd_info
,
791 dpif_netdev_enumerate(struct sset
*all_dps
,
792 const struct dpif_class
*dpif_class
)
794 struct shash_node
*node
;
796 ovs_mutex_lock(&dp_netdev_mutex
);
797 SHASH_FOR_EACH(node
, &dp_netdevs
) {
798 struct dp_netdev
*dp
= node
->data
;
799 if (dpif_class
!= dp
->class) {
800 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
801 * If the class doesn't match, skip this dpif. */
804 sset_add(all_dps
, node
->name
);
806 ovs_mutex_unlock(&dp_netdev_mutex
);
812 dpif_netdev_class_is_dummy(const struct dpif_class
*class)
814 return class != &dpif_netdev_class
;
818 dpif_netdev_port_open_type(const struct dpif_class
*class, const char *type
)
820 return strcmp(type
, "internal") ? type
821 : dpif_netdev_class_is_dummy(class) ? "dummy"
826 create_dpif_netdev(struct dp_netdev
*dp
)
828 uint16_t netflow_id
= hash_string(dp
->name
, 0);
829 struct dpif_netdev
*dpif
;
831 ovs_refcount_ref(&dp
->ref_cnt
);
833 dpif
= xmalloc(sizeof *dpif
);
834 dpif_init(&dpif
->dpif
, dp
->class, dp
->name
, netflow_id
>> 8, netflow_id
);
836 dpif
->last_port_seq
= seq_read(dp
->port_seq
);
841 /* Choose an unused, non-zero port number and return it on success.
842 * Return ODPP_NONE on failure. */
844 choose_port(struct dp_netdev
*dp
, const char *name
)
845 OVS_REQUIRES(dp
->port_mutex
)
849 if (dp
->class != &dpif_netdev_class
) {
853 /* If the port name begins with "br", start the number search at
854 * 100 to make writing tests easier. */
855 if (!strncmp(name
, "br", 2)) {
859 /* If the port name contains a number, try to assign that port number.
860 * This can make writing unit tests easier because port numbers are
862 for (p
= name
; *p
!= '\0'; p
++) {
863 if (isdigit((unsigned char) *p
)) {
864 port_no
= start_no
+ strtol(p
, NULL
, 10);
865 if (port_no
> 0 && port_no
!= odp_to_u32(ODPP_NONE
)
866 && !dp_netdev_lookup_port(dp
, u32_to_odp(port_no
))) {
867 return u32_to_odp(port_no
);
874 for (port_no
= 1; port_no
<= UINT16_MAX
; port_no
++) {
875 if (!dp_netdev_lookup_port(dp
, u32_to_odp(port_no
))) {
876 return u32_to_odp(port_no
);
884 create_dp_netdev(const char *name
, const struct dpif_class
*class,
885 struct dp_netdev
**dpp
)
886 OVS_REQUIRES(dp_netdev_mutex
)
888 struct dp_netdev
*dp
;
891 dp
= xzalloc(sizeof *dp
);
892 shash_add(&dp_netdevs
, name
, dp
);
894 *CONST_CAST(const struct dpif_class
**, &dp
->class) = class;
895 *CONST_CAST(const char **, &dp
->name
) = xstrdup(name
);
896 ovs_refcount_init(&dp
->ref_cnt
);
897 atomic_flag_clear(&dp
->destroyed
);
899 ovs_mutex_init(&dp
->port_mutex
);
900 cmap_init(&dp
->ports
);
901 dp
->port_seq
= seq_create();
902 fat_rwlock_init(&dp
->upcall_rwlock
);
904 /* Disable upcalls by default. */
905 dp_netdev_disable_upcall(dp
);
906 dp
->upcall_aux
= NULL
;
907 dp
->upcall_cb
= NULL
;
909 cmap_init(&dp
->poll_threads
);
910 ovs_mutex_init_recursive(&dp
->non_pmd_mutex
);
911 ovsthread_key_create(&dp
->per_pmd_key
, NULL
);
913 dp_netdev_set_nonpmd(dp
);
915 ovs_mutex_lock(&dp
->port_mutex
);
916 error
= do_add_port(dp
, name
, "internal", ODPP_LOCAL
);
917 ovs_mutex_unlock(&dp
->port_mutex
);
923 dp
->last_tnl_conf_seq
= seq_read(tnl_conf_seq
);
929 dpif_netdev_open(const struct dpif_class
*class, const char *name
,
930 bool create
, struct dpif
**dpifp
)
932 struct dp_netdev
*dp
;
935 ovs_mutex_lock(&dp_netdev_mutex
);
936 dp
= shash_find_data(&dp_netdevs
, name
);
938 error
= create
? create_dp_netdev(name
, class, &dp
) : ENODEV
;
940 error
= (dp
->class != class ? EINVAL
945 *dpifp
= create_dpif_netdev(dp
);
948 ovs_mutex_unlock(&dp_netdev_mutex
);
954 dp_netdev_destroy_upcall_lock(struct dp_netdev
*dp
)
955 OVS_NO_THREAD_SAFETY_ANALYSIS
957 /* Check that upcalls are disabled, i.e. that the rwlock is taken */
958 ovs_assert(fat_rwlock_tryrdlock(&dp
->upcall_rwlock
));
960 /* Before freeing a lock we should release it */
961 fat_rwlock_unlock(&dp
->upcall_rwlock
);
962 fat_rwlock_destroy(&dp
->upcall_rwlock
);
965 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
966 * through the 'dp_netdevs' shash while freeing 'dp'. */
968 dp_netdev_free(struct dp_netdev
*dp
)
969 OVS_REQUIRES(dp_netdev_mutex
)
971 struct dp_netdev_port
*port
;
973 shash_find_and_delete(&dp_netdevs
, dp
->name
);
975 dp_netdev_destroy_all_pmds(dp
);
976 ovs_mutex_destroy(&dp
->non_pmd_mutex
);
977 ovsthread_key_delete(dp
->per_pmd_key
);
979 ovs_mutex_lock(&dp
->port_mutex
);
980 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
981 /* PMD threads are destroyed here. do_del_port() cannot quiesce */
982 do_del_port(dp
, port
);
984 ovs_mutex_unlock(&dp
->port_mutex
);
985 cmap_destroy(&dp
->poll_threads
);
987 seq_destroy(dp
->port_seq
);
988 cmap_destroy(&dp
->ports
);
990 /* Upcalls must be disabled at this point */
991 dp_netdev_destroy_upcall_lock(dp
);
994 free(CONST_CAST(char *, dp
->name
));
999 dp_netdev_unref(struct dp_netdev
*dp
)
1002 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
1003 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
1004 ovs_mutex_lock(&dp_netdev_mutex
);
1005 if (ovs_refcount_unref_relaxed(&dp
->ref_cnt
) == 1) {
1008 ovs_mutex_unlock(&dp_netdev_mutex
);
1013 dpif_netdev_close(struct dpif
*dpif
)
1015 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1017 dp_netdev_unref(dp
);
1022 dpif_netdev_destroy(struct dpif
*dpif
)
1024 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1026 if (!atomic_flag_test_and_set(&dp
->destroyed
)) {
1027 if (ovs_refcount_unref_relaxed(&dp
->ref_cnt
) == 1) {
1028 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
1036 /* Add 'n' to the atomic variable 'var' non-atomically and using relaxed
1037 * load/store semantics. While the increment is not atomic, the load and
1038 * store operations are, making it impossible to read inconsistent values.
1040 * This is used to update thread local stats counters. */
1042 non_atomic_ullong_add(atomic_ullong
*var
, unsigned long long n
)
1044 unsigned long long tmp
;
1046 atomic_read_relaxed(var
, &tmp
);
1048 atomic_store_relaxed(var
, tmp
);
1052 dpif_netdev_get_stats(const struct dpif
*dpif
, struct dpif_dp_stats
*stats
)
1054 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1055 struct dp_netdev_pmd_thread
*pmd
;
1057 stats
->n_flows
= stats
->n_hit
= stats
->n_missed
= stats
->n_lost
= 0;
1058 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1059 unsigned long long n
;
1060 stats
->n_flows
+= cmap_count(&pmd
->flow_table
);
1062 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_MASKED_HIT
], &n
);
1064 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_EXACT_HIT
], &n
);
1066 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_MISS
], &n
);
1067 stats
->n_missed
+= n
;
1068 atomic_read_relaxed(&pmd
->stats
.n
[DP_STAT_LOST
], &n
);
1071 stats
->n_masks
= UINT32_MAX
;
1072 stats
->n_mask_hit
= UINT64_MAX
;
1078 dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread
*pmd
)
1082 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
1086 ovs_mutex_lock(&pmd
->cond_mutex
);
1087 atomic_add_relaxed(&pmd
->change_seq
, 1, &old_seq
);
1088 ovs_mutex_cond_wait(&pmd
->cond
, &pmd
->cond_mutex
);
1089 ovs_mutex_unlock(&pmd
->cond_mutex
);
1093 hash_port_no(odp_port_t port_no
)
1095 return hash_int(odp_to_u32(port_no
), 0);
1099 do_add_port(struct dp_netdev
*dp
, const char *devname
, const char *type
,
1101 OVS_REQUIRES(dp
->port_mutex
)
1103 struct netdev_saved_flags
*sf
;
1104 struct dp_netdev_port
*port
;
1105 struct netdev
*netdev
;
1106 enum netdev_flags flags
;
1107 const char *open_type
;
1109 int i
, n_open_rxqs
= 0;
1111 /* Reject devices already in 'dp'. */
1112 if (!get_port_by_name(dp
, devname
, &port
)) {
1117 /* Open and validate network device. */
1118 open_type
= dpif_netdev_port_open_type(dp
->class, type
);
1119 error
= netdev_open(devname
, open_type
, &netdev
);
1123 /* XXX reject non-Ethernet devices */
1125 netdev_get_flags(netdev
, &flags
);
1126 if (flags
& NETDEV_LOOPBACK
) {
1127 VLOG_ERR("%s: cannot add a loopback device", devname
);
1132 if (netdev_is_pmd(netdev
)) {
1133 int n_cores
= ovs_numa_get_n_cores();
1135 if (n_cores
== OVS_CORE_UNSPEC
) {
1136 VLOG_ERR("%s, cannot get cpu core info", devname
);
1140 /* There can only be ovs_numa_get_n_cores() pmd threads,
1141 * so creates a txq for each, and one extra for the non
1143 error
= netdev_set_multiq(netdev
, n_cores
+ 1,
1144 netdev_requested_n_rxq(netdev
));
1145 if (error
&& (error
!= EOPNOTSUPP
)) {
1146 VLOG_ERR("%s, cannot set multiq", devname
);
1150 port
= xzalloc(sizeof *port
);
1151 port
->port_no
= port_no
;
1152 port
->netdev
= netdev
;
1153 port
->n_rxq
= netdev_n_rxq(netdev
);
1154 port
->rxq
= xmalloc(sizeof *port
->rxq
* port
->n_rxq
);
1155 port
->type
= xstrdup(type
);
1156 port
->latest_requested_n_rxq
= netdev_requested_n_rxq(netdev
);
1158 for (i
= 0; i
< port
->n_rxq
; i
++) {
1159 error
= netdev_rxq_open(netdev
, &port
->rxq
[i
], i
);
1161 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
1162 devname
, ovs_strerror(errno
));
1168 error
= netdev_turn_flags_on(netdev
, NETDEV_PROMISC
, &sf
);
1174 cmap_insert(&dp
->ports
, &port
->node
, hash_port_no(port_no
));
1176 if (netdev_is_pmd(netdev
)) {
1177 dp_netdev_add_port_to_pmds(dp
, port
);
1179 seq_change(dp
->port_seq
);
1184 for (i
= 0; i
< n_open_rxqs
; i
++) {
1185 netdev_rxq_close(port
->rxq
[i
]);
1191 netdev_close(netdev
);
1197 dpif_netdev_port_add(struct dpif
*dpif
, struct netdev
*netdev
,
1198 odp_port_t
*port_nop
)
1200 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1201 char namebuf
[NETDEV_VPORT_NAME_BUFSIZE
];
1202 const char *dpif_port
;
1206 ovs_mutex_lock(&dp
->port_mutex
);
1207 dpif_port
= netdev_vport_get_dpif_port(netdev
, namebuf
, sizeof namebuf
);
1208 if (*port_nop
!= ODPP_NONE
) {
1209 port_no
= *port_nop
;
1210 error
= dp_netdev_lookup_port(dp
, *port_nop
) ? EBUSY
: 0;
1212 port_no
= choose_port(dp
, dpif_port
);
1213 error
= port_no
== ODPP_NONE
? EFBIG
: 0;
1216 *port_nop
= port_no
;
1217 error
= do_add_port(dp
, dpif_port
, netdev_get_type(netdev
), port_no
);
1219 ovs_mutex_unlock(&dp
->port_mutex
);
1225 dpif_netdev_port_del(struct dpif
*dpif
, odp_port_t port_no
)
1227 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1230 ovs_mutex_lock(&dp
->port_mutex
);
1231 if (port_no
== ODPP_LOCAL
) {
1234 struct dp_netdev_port
*port
;
1236 error
= get_port_by_number(dp
, port_no
, &port
);
1238 do_del_port(dp
, port
);
1241 ovs_mutex_unlock(&dp
->port_mutex
);
1247 is_valid_port_number(odp_port_t port_no
)
1249 return port_no
!= ODPP_NONE
;
1252 static struct dp_netdev_port
*
1253 dp_netdev_lookup_port(const struct dp_netdev
*dp
, odp_port_t port_no
)
1255 struct dp_netdev_port
*port
;
1257 CMAP_FOR_EACH_WITH_HASH (port
, node
, hash_port_no(port_no
), &dp
->ports
) {
1258 if (port
->port_no
== port_no
) {
1266 get_port_by_number(struct dp_netdev
*dp
,
1267 odp_port_t port_no
, struct dp_netdev_port
**portp
)
1269 if (!is_valid_port_number(port_no
)) {
1273 *portp
= dp_netdev_lookup_port(dp
, port_no
);
1274 return *portp
? 0 : ENOENT
;
1279 port_destroy(struct dp_netdev_port
*port
)
1285 netdev_close(port
->netdev
);
1286 netdev_restore_flags(port
->sf
);
1288 for (unsigned i
= 0; i
< port
->n_rxq
; i
++) {
1289 netdev_rxq_close(port
->rxq
[i
]);
1298 get_port_by_name(struct dp_netdev
*dp
,
1299 const char *devname
, struct dp_netdev_port
**portp
)
1300 OVS_REQUIRES(dp
->port_mutex
)
1302 struct dp_netdev_port
*port
;
1304 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
1305 if (!strcmp(netdev_get_name(port
->netdev
), devname
)) {
1314 get_n_pmd_threads(struct dp_netdev
*dp
)
1316 /* There is one non pmd thread in dp->poll_threads */
1317 return cmap_count(&dp
->poll_threads
) - 1;
1321 get_n_pmd_threads_on_numa(struct dp_netdev
*dp
, int numa_id
)
1323 struct dp_netdev_pmd_thread
*pmd
;
1326 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1327 if (pmd
->numa_id
== numa_id
) {
1335 /* Returns 'true' if there is a port with pmd netdev and the netdev
1336 * is on numa node 'numa_id'. */
1338 has_pmd_port_for_numa(struct dp_netdev
*dp
, int numa_id
)
1340 struct dp_netdev_port
*port
;
1342 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
1343 if (netdev_is_pmd(port
->netdev
)
1344 && netdev_get_numa_id(port
->netdev
) == numa_id
) {
1354 do_del_port(struct dp_netdev
*dp
, struct dp_netdev_port
*port
)
1355 OVS_REQUIRES(dp
->port_mutex
)
1357 cmap_remove(&dp
->ports
, &port
->node
, hash_odp_port(port
->port_no
));
1358 seq_change(dp
->port_seq
);
1359 if (netdev_is_pmd(port
->netdev
)) {
1360 int numa_id
= netdev_get_numa_id(port
->netdev
);
1362 /* PMD threads can not be on invalid numa node. */
1363 ovs_assert(ovs_numa_numa_id_is_valid(numa_id
));
1364 /* If there is no netdev on the numa node, deletes the pmd threads
1365 * for that numa. Else, deletes the queues from polling lists. */
1366 if (!has_pmd_port_for_numa(dp
, numa_id
)) {
1367 dp_netdev_del_pmds_on_numa(dp
, numa_id
);
1369 dp_netdev_del_port_from_all_pmds(dp
, port
);
1377 answer_port_query(const struct dp_netdev_port
*port
,
1378 struct dpif_port
*dpif_port
)
1380 dpif_port
->name
= xstrdup(netdev_get_name(port
->netdev
));
1381 dpif_port
->type
= xstrdup(port
->type
);
1382 dpif_port
->port_no
= port
->port_no
;
1386 dpif_netdev_port_query_by_number(const struct dpif
*dpif
, odp_port_t port_no
,
1387 struct dpif_port
*dpif_port
)
1389 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1390 struct dp_netdev_port
*port
;
1393 error
= get_port_by_number(dp
, port_no
, &port
);
1394 if (!error
&& dpif_port
) {
1395 answer_port_query(port
, dpif_port
);
1402 dpif_netdev_port_query_by_name(const struct dpif
*dpif
, const char *devname
,
1403 struct dpif_port
*dpif_port
)
1405 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1406 struct dp_netdev_port
*port
;
1409 ovs_mutex_lock(&dp
->port_mutex
);
1410 error
= get_port_by_name(dp
, devname
, &port
);
1411 if (!error
&& dpif_port
) {
1412 answer_port_query(port
, dpif_port
);
1414 ovs_mutex_unlock(&dp
->port_mutex
);
1420 dp_netdev_flow_free(struct dp_netdev_flow
*flow
)
1422 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow
));
1426 static void dp_netdev_flow_unref(struct dp_netdev_flow
*flow
)
1428 if (ovs_refcount_unref_relaxed(&flow
->ref_cnt
) == 1) {
1429 ovsrcu_postpone(dp_netdev_flow_free
, flow
);
1434 dp_netdev_flow_hash(const ovs_u128
*ufid
)
1436 return ufid
->u32
[0];
1440 dp_netdev_pmd_remove_flow(struct dp_netdev_pmd_thread
*pmd
,
1441 struct dp_netdev_flow
*flow
)
1442 OVS_REQUIRES(pmd
->flow_mutex
)
1444 struct cmap_node
*node
= CONST_CAST(struct cmap_node
*, &flow
->node
);
1446 dpcls_remove(&pmd
->cls
, &flow
->cr
);
1447 cmap_remove(&pmd
->flow_table
, node
, dp_netdev_flow_hash(&flow
->ufid
));
1450 dp_netdev_flow_unref(flow
);
1454 dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread
*pmd
)
1456 struct dp_netdev_flow
*netdev_flow
;
1458 ovs_mutex_lock(&pmd
->flow_mutex
);
1459 CMAP_FOR_EACH (netdev_flow
, node
, &pmd
->flow_table
) {
1460 dp_netdev_pmd_remove_flow(pmd
, netdev_flow
);
1462 ovs_mutex_unlock(&pmd
->flow_mutex
);
1466 dpif_netdev_flow_flush(struct dpif
*dpif
)
1468 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1469 struct dp_netdev_pmd_thread
*pmd
;
1471 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
1472 dp_netdev_pmd_flow_flush(pmd
);
1478 struct dp_netdev_port_state
{
1479 struct cmap_position position
;
1484 dpif_netdev_port_dump_start(const struct dpif
*dpif OVS_UNUSED
, void **statep
)
1486 *statep
= xzalloc(sizeof(struct dp_netdev_port_state
));
1491 dpif_netdev_port_dump_next(const struct dpif
*dpif
, void *state_
,
1492 struct dpif_port
*dpif_port
)
1494 struct dp_netdev_port_state
*state
= state_
;
1495 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1496 struct cmap_node
*node
;
1499 node
= cmap_next_position(&dp
->ports
, &state
->position
);
1501 struct dp_netdev_port
*port
;
1503 port
= CONTAINER_OF(node
, struct dp_netdev_port
, node
);
1506 state
->name
= xstrdup(netdev_get_name(port
->netdev
));
1507 dpif_port
->name
= state
->name
;
1508 dpif_port
->type
= port
->type
;
1509 dpif_port
->port_no
= port
->port_no
;
1520 dpif_netdev_port_dump_done(const struct dpif
*dpif OVS_UNUSED
, void *state_
)
1522 struct dp_netdev_port_state
*state
= state_
;
1529 dpif_netdev_port_poll(const struct dpif
*dpif_
, char **devnamep OVS_UNUSED
)
1531 struct dpif_netdev
*dpif
= dpif_netdev_cast(dpif_
);
1532 uint64_t new_port_seq
;
1535 new_port_seq
= seq_read(dpif
->dp
->port_seq
);
1536 if (dpif
->last_port_seq
!= new_port_seq
) {
1537 dpif
->last_port_seq
= new_port_seq
;
1547 dpif_netdev_port_poll_wait(const struct dpif
*dpif_
)
1549 struct dpif_netdev
*dpif
= dpif_netdev_cast(dpif_
);
1551 seq_wait(dpif
->dp
->port_seq
, dpif
->last_port_seq
);
1554 static struct dp_netdev_flow
*
1555 dp_netdev_flow_cast(const struct dpcls_rule
*cr
)
1557 return cr
? CONTAINER_OF(cr
, struct dp_netdev_flow
, cr
) : NULL
;
1560 static bool dp_netdev_flow_ref(struct dp_netdev_flow
*flow
)
1562 return ovs_refcount_try_ref_rcu(&flow
->ref_cnt
);
1565 /* netdev_flow_key utilities.
1567 * netdev_flow_key is basically a miniflow. We use these functions
1568 * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
1569 * functions (miniflow_clone_inline, miniflow_equal, ...), because:
1571 * - Since we are dealing exclusively with miniflows created by
1572 * miniflow_extract(), if the map is different the miniflow is different.
1573 * Therefore we can be faster by comparing the map and the miniflow in a
1575 * - These functions can be inlined by the compiler. */
1577 /* Given the number of bits set in miniflow's maps, returns the size of the
1578 * 'netdev_flow_key.mf' */
1579 static inline size_t
1580 netdev_flow_key_size(size_t flow_u64s
)
1582 return sizeof(struct miniflow
) + MINIFLOW_VALUES_SIZE(flow_u64s
);
1586 netdev_flow_key_equal(const struct netdev_flow_key
*a
,
1587 const struct netdev_flow_key
*b
)
1589 /* 'b->len' may be not set yet. */
1590 return a
->hash
== b
->hash
&& !memcmp(&a
->mf
, &b
->mf
, a
->len
);
1593 /* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
1594 * The maps are compared bitwise, so both 'key->mf' and 'mf' must have been
1595 * generated by miniflow_extract. */
1597 netdev_flow_key_equal_mf(const struct netdev_flow_key
*key
,
1598 const struct miniflow
*mf
)
1600 return !memcmp(&key
->mf
, mf
, key
->len
);
1604 netdev_flow_key_clone(struct netdev_flow_key
*dst
,
1605 const struct netdev_flow_key
*src
)
1608 offsetof(struct netdev_flow_key
, mf
) + src
->len
);
1613 netdev_flow_key_from_flow(struct netdev_flow_key
*dst
,
1614 const struct flow
*src
)
1616 struct dp_packet packet
;
1617 uint64_t buf_stub
[512 / 8];
1619 dp_packet_use_stub(&packet
, buf_stub
, sizeof buf_stub
);
1620 pkt_metadata_from_flow(&packet
.md
, src
);
1621 flow_compose(&packet
, src
);
1622 miniflow_extract(&packet
, &dst
->mf
);
1623 dp_packet_uninit(&packet
);
1625 dst
->len
= netdev_flow_key_size(miniflow_n_values(&dst
->mf
));
1626 dst
->hash
= 0; /* Not computed yet. */
1629 /* Initialize a netdev_flow_key 'mask' from 'match'. */
1631 netdev_flow_mask_init(struct netdev_flow_key
*mask
,
1632 const struct match
*match
)
1634 uint64_t *dst
= miniflow_values(&mask
->mf
);
1635 struct flowmap fmap
;
1639 /* Only check masks that make sense for the flow. */
1640 flow_wc_map(&match
->flow
, &fmap
);
1641 flowmap_init(&mask
->mf
.map
);
1643 FLOWMAP_FOR_EACH_INDEX(idx
, fmap
) {
1644 uint64_t mask_u64
= flow_u64_value(&match
->wc
.masks
, idx
);
1647 flowmap_set(&mask
->mf
.map
, idx
, 1);
1649 hash
= hash_add64(hash
, mask_u64
);
1655 FLOWMAP_FOR_EACH_MAP (map
, mask
->mf
.map
) {
1656 hash
= hash_add64(hash
, map
);
1659 size_t n
= dst
- miniflow_get_values(&mask
->mf
);
1661 mask
->hash
= hash_finish(hash
, n
* 8);
1662 mask
->len
= netdev_flow_key_size(n
);
1665 /* Initializes 'dst' as a copy of 'flow' masked with 'mask'. */
1667 netdev_flow_key_init_masked(struct netdev_flow_key
*dst
,
1668 const struct flow
*flow
,
1669 const struct netdev_flow_key
*mask
)
1671 uint64_t *dst_u64
= miniflow_values(&dst
->mf
);
1672 const uint64_t *mask_u64
= miniflow_get_values(&mask
->mf
);
1676 dst
->len
= mask
->len
;
1677 dst
->mf
= mask
->mf
; /* Copy maps. */
1679 FLOW_FOR_EACH_IN_MAPS(value
, flow
, mask
->mf
.map
) {
1680 *dst_u64
= value
& *mask_u64
++;
1681 hash
= hash_add64(hash
, *dst_u64
++);
1683 dst
->hash
= hash_finish(hash
,
1684 (dst_u64
- miniflow_get_values(&dst
->mf
)) * 8);
1687 /* Iterate through netdev_flow_key TNL u64 values specified by 'FLOWMAP'. */
1688 #define NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(VALUE, KEY, FLOWMAP) \
1689 MINIFLOW_FOR_EACH_IN_FLOWMAP(VALUE, &(KEY)->mf, FLOWMAP)
1691 /* Returns a hash value for the bits of 'key' where there are 1-bits in
1693 static inline uint32_t
1694 netdev_flow_key_hash_in_mask(const struct netdev_flow_key
*key
,
1695 const struct netdev_flow_key
*mask
)
1697 const uint64_t *p
= miniflow_get_values(&mask
->mf
);
1701 NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value
, key
, mask
->mf
.map
) {
1702 hash
= hash_add64(hash
, value
& *p
++);
1705 return hash_finish(hash
, (p
- miniflow_get_values(&mask
->mf
)) * 8);
1709 emc_entry_alive(struct emc_entry
*ce
)
1711 return ce
->flow
&& !ce
->flow
->dead
;
1715 emc_clear_entry(struct emc_entry
*ce
)
1718 dp_netdev_flow_unref(ce
->flow
);
1724 emc_change_entry(struct emc_entry
*ce
, struct dp_netdev_flow
*flow
,
1725 const struct netdev_flow_key
*key
)
1727 if (ce
->flow
!= flow
) {
1729 dp_netdev_flow_unref(ce
->flow
);
1732 if (dp_netdev_flow_ref(flow
)) {
1739 netdev_flow_key_clone(&ce
->key
, key
);
1744 emc_insert(struct emc_cache
*cache
, const struct netdev_flow_key
*key
,
1745 struct dp_netdev_flow
*flow
)
1747 struct emc_entry
*to_be_replaced
= NULL
;
1748 struct emc_entry
*current_entry
;
1750 EMC_FOR_EACH_POS_WITH_HASH(cache
, current_entry
, key
->hash
) {
1751 if (netdev_flow_key_equal(¤t_entry
->key
, key
)) {
1752 /* We found the entry with the 'mf' miniflow */
1753 emc_change_entry(current_entry
, flow
, NULL
);
1757 /* Replacement policy: put the flow in an empty (not alive) entry, or
1758 * in the first entry where it can be */
1760 || (emc_entry_alive(to_be_replaced
)
1761 && !emc_entry_alive(current_entry
))
1762 || current_entry
->key
.hash
< to_be_replaced
->key
.hash
) {
1763 to_be_replaced
= current_entry
;
1766 /* We didn't find the miniflow in the cache.
1767 * The 'to_be_replaced' entry is where the new flow will be stored */
1769 emc_change_entry(to_be_replaced
, flow
, key
);
1772 static inline struct dp_netdev_flow
*
1773 emc_lookup(struct emc_cache
*cache
, const struct netdev_flow_key
*key
)
1775 struct emc_entry
*current_entry
;
1777 EMC_FOR_EACH_POS_WITH_HASH(cache
, current_entry
, key
->hash
) {
1778 if (current_entry
->key
.hash
== key
->hash
1779 && emc_entry_alive(current_entry
)
1780 && netdev_flow_key_equal_mf(¤t_entry
->key
, &key
->mf
)) {
1782 /* We found the entry with the 'key->mf' miniflow */
1783 return current_entry
->flow
;
1790 static struct dp_netdev_flow
*
1791 dp_netdev_pmd_lookup_flow(const struct dp_netdev_pmd_thread
*pmd
,
1792 const struct netdev_flow_key
*key
)
1794 struct dp_netdev_flow
*netdev_flow
;
1795 struct dpcls_rule
*rule
;
1797 dpcls_lookup(&pmd
->cls
, key
, &rule
, 1);
1798 netdev_flow
= dp_netdev_flow_cast(rule
);
1803 static struct dp_netdev_flow
*
1804 dp_netdev_pmd_find_flow(const struct dp_netdev_pmd_thread
*pmd
,
1805 const ovs_u128
*ufidp
, const struct nlattr
*key
,
1808 struct dp_netdev_flow
*netdev_flow
;
1812 /* If a UFID is not provided, determine one based on the key. */
1813 if (!ufidp
&& key
&& key_len
1814 && !dpif_netdev_flow_from_nlattrs(key
, key_len
, &flow
)) {
1815 dpif_flow_hash(pmd
->dp
->dpif
, &flow
, sizeof flow
, &ufid
);
1820 CMAP_FOR_EACH_WITH_HASH (netdev_flow
, node
, dp_netdev_flow_hash(ufidp
),
1822 if (ovs_u128_equals(netdev_flow
->ufid
, *ufidp
)) {
1832 get_dpif_flow_stats(const struct dp_netdev_flow
*netdev_flow_
,
1833 struct dpif_flow_stats
*stats
)
1835 struct dp_netdev_flow
*netdev_flow
;
1836 unsigned long long n
;
1840 netdev_flow
= CONST_CAST(struct dp_netdev_flow
*, netdev_flow_
);
1842 atomic_read_relaxed(&netdev_flow
->stats
.packet_count
, &n
);
1843 stats
->n_packets
= n
;
1844 atomic_read_relaxed(&netdev_flow
->stats
.byte_count
, &n
);
1846 atomic_read_relaxed(&netdev_flow
->stats
.used
, &used
);
1848 atomic_read_relaxed(&netdev_flow
->stats
.tcp_flags
, &flags
);
1849 stats
->tcp_flags
= flags
;
1852 /* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
1853 * storing the netlink-formatted key/mask. 'key_buf' may be the same as
1854 * 'mask_buf'. Actions will be returned without copying, by relying on RCU to
1857 dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow
*netdev_flow
,
1858 struct ofpbuf
*key_buf
, struct ofpbuf
*mask_buf
,
1859 struct dpif_flow
*flow
, bool terse
)
1862 memset(flow
, 0, sizeof *flow
);
1864 struct flow_wildcards wc
;
1865 struct dp_netdev_actions
*actions
;
1867 struct odp_flow_key_parms odp_parms
= {
1868 .flow
= &netdev_flow
->flow
,
1870 .support
= dp_netdev_support
,
1873 miniflow_expand(&netdev_flow
->cr
.mask
->mf
, &wc
.masks
);
1876 offset
= key_buf
->size
;
1877 flow
->key
= ofpbuf_tail(key_buf
);
1878 odp_parms
.odp_in_port
= netdev_flow
->flow
.in_port
.odp_port
;
1879 odp_flow_key_from_flow(&odp_parms
, key_buf
);
1880 flow
->key_len
= key_buf
->size
- offset
;
1883 offset
= mask_buf
->size
;
1884 flow
->mask
= ofpbuf_tail(mask_buf
);
1885 odp_parms
.odp_in_port
= wc
.masks
.in_port
.odp_port
;
1886 odp_parms
.key_buf
= key_buf
;
1887 odp_flow_key_from_mask(&odp_parms
, mask_buf
);
1888 flow
->mask_len
= mask_buf
->size
- offset
;
1891 actions
= dp_netdev_flow_get_actions(netdev_flow
);
1892 flow
->actions
= actions
->actions
;
1893 flow
->actions_len
= actions
->size
;
1896 flow
->ufid
= netdev_flow
->ufid
;
1897 flow
->ufid_present
= true;
1898 flow
->pmd_id
= netdev_flow
->pmd_id
;
1899 get_dpif_flow_stats(netdev_flow
, &flow
->stats
);
1903 dpif_netdev_mask_from_nlattrs(const struct nlattr
*key
, uint32_t key_len
,
1904 const struct nlattr
*mask_key
,
1905 uint32_t mask_key_len
, const struct flow
*flow
,
1906 struct flow_wildcards
*wc
)
1908 enum odp_key_fitness fitness
;
1910 fitness
= odp_flow_key_to_mask_udpif(mask_key
, mask_key_len
, key
,
1913 /* This should not happen: it indicates that
1914 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1915 * disagree on the acceptable form of a mask. Log the problem
1916 * as an error, with enough details to enable debugging. */
1917 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1919 if (!VLOG_DROP_ERR(&rl
)) {
1923 odp_flow_format(key
, key_len
, mask_key
, mask_key_len
, NULL
, &s
,
1925 VLOG_ERR("internal error parsing flow mask %s (%s)",
1926 ds_cstr(&s
), odp_key_fitness_to_string(fitness
));
1937 dpif_netdev_flow_from_nlattrs(const struct nlattr
*key
, uint32_t key_len
,
1942 if (odp_flow_key_to_flow_udpif(key
, key_len
, flow
)) {
1943 /* This should not happen: it indicates that odp_flow_key_from_flow()
1944 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1945 * flow. Log the problem as an error, with enough details to enable
1947 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
1949 if (!VLOG_DROP_ERR(&rl
)) {
1953 odp_flow_format(key
, key_len
, NULL
, 0, NULL
, &s
, true);
1954 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s
));
1961 in_port
= flow
->in_port
.odp_port
;
1962 if (!is_valid_port_number(in_port
) && in_port
!= ODPP_NONE
) {
1966 /* Userspace datapath doesn't support conntrack. */
1967 if (flow
->ct_state
|| flow
->ct_zone
|| flow
->ct_mark
1968 || !ovs_u128_is_zero(flow
->ct_label
)) {
1976 dpif_netdev_flow_get(const struct dpif
*dpif
, const struct dpif_flow_get
*get
)
1978 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
1979 struct dp_netdev_flow
*netdev_flow
;
1980 struct dp_netdev_pmd_thread
*pmd
;
1981 unsigned pmd_id
= get
->pmd_id
== PMD_ID_NULL
1982 ? NON_PMD_CORE_ID
: get
->pmd_id
;
1985 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
1990 netdev_flow
= dp_netdev_pmd_find_flow(pmd
, get
->ufid
, get
->key
,
1993 dp_netdev_flow_to_dpif_flow(netdev_flow
, get
->buffer
, get
->buffer
,
1998 dp_netdev_pmd_unref(pmd
);
2004 static struct dp_netdev_flow
*
2005 dp_netdev_flow_add(struct dp_netdev_pmd_thread
*pmd
,
2006 struct match
*match
, const ovs_u128
*ufid
,
2007 const struct nlattr
*actions
, size_t actions_len
)
2008 OVS_REQUIRES(pmd
->flow_mutex
)
2010 struct dp_netdev_flow
*flow
;
2011 struct netdev_flow_key mask
;
2013 netdev_flow_mask_init(&mask
, match
);
2014 /* Make sure wc does not have metadata. */
2015 ovs_assert(!FLOWMAP_HAS_FIELD(&mask
.mf
.map
, metadata
)
2016 && !FLOWMAP_HAS_FIELD(&mask
.mf
.map
, regs
));
2018 /* Do not allocate extra space. */
2019 flow
= xmalloc(sizeof *flow
- sizeof flow
->cr
.flow
.mf
+ mask
.len
);
2020 memset(&flow
->stats
, 0, sizeof flow
->stats
);
2023 *CONST_CAST(unsigned *, &flow
->pmd_id
) = pmd
->core_id
;
2024 *CONST_CAST(struct flow
*, &flow
->flow
) = match
->flow
;
2025 *CONST_CAST(ovs_u128
*, &flow
->ufid
) = *ufid
;
2026 ovs_refcount_init(&flow
->ref_cnt
);
2027 ovsrcu_set(&flow
->actions
, dp_netdev_actions_create(actions
, actions_len
));
2029 netdev_flow_key_init_masked(&flow
->cr
.flow
, &match
->flow
, &mask
);
2030 dpcls_insert(&pmd
->cls
, &flow
->cr
, &mask
);
2032 cmap_insert(&pmd
->flow_table
, CONST_CAST(struct cmap_node
*, &flow
->node
),
2033 dp_netdev_flow_hash(&flow
->ufid
));
2035 if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
2037 struct ds ds
= DS_EMPTY_INITIALIZER
;
2039 match
.tun_md
.valid
= false;
2040 match
.flow
= flow
->flow
;
2041 miniflow_expand(&flow
->cr
.mask
->mf
, &match
.wc
.masks
);
2043 ds_put_cstr(&ds
, "flow_add: ");
2044 odp_format_ufid(ufid
, &ds
);
2045 ds_put_cstr(&ds
, " ");
2046 match_format(&match
, &ds
, OFP_DEFAULT_PRIORITY
);
2047 ds_put_cstr(&ds
, ", actions:");
2048 format_odp_actions(&ds
, actions
, actions_len
);
2050 VLOG_DBG_RL(&upcall_rl
, "%s", ds_cstr(&ds
));
2059 dpif_netdev_flow_put(struct dpif
*dpif
, const struct dpif_flow_put
*put
)
2061 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2062 struct dp_netdev_flow
*netdev_flow
;
2063 struct netdev_flow_key key
;
2064 struct dp_netdev_pmd_thread
*pmd
;
2067 unsigned pmd_id
= put
->pmd_id
== PMD_ID_NULL
2068 ? NON_PMD_CORE_ID
: put
->pmd_id
;
2071 error
= dpif_netdev_flow_from_nlattrs(put
->key
, put
->key_len
, &match
.flow
);
2075 error
= dpif_netdev_mask_from_nlattrs(put
->key
, put
->key_len
,
2076 put
->mask
, put
->mask_len
,
2077 &match
.flow
, &match
.wc
);
2082 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
2087 /* Must produce a netdev_flow_key for lookup.
2088 * This interface is no longer performance critical, since it is not used
2089 * for upcall processing any more. */
2090 netdev_flow_key_from_flow(&key
, &match
.flow
);
2095 dpif_flow_hash(dpif
, &match
.flow
, sizeof match
.flow
, &ufid
);
2098 ovs_mutex_lock(&pmd
->flow_mutex
);
2099 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &key
);
2101 if (put
->flags
& DPIF_FP_CREATE
) {
2102 if (cmap_count(&pmd
->flow_table
) < MAX_FLOWS
) {
2104 memset(put
->stats
, 0, sizeof *put
->stats
);
2106 dp_netdev_flow_add(pmd
, &match
, &ufid
, put
->actions
,
2116 if (put
->flags
& DPIF_FP_MODIFY
2117 && flow_equal(&match
.flow
, &netdev_flow
->flow
)) {
2118 struct dp_netdev_actions
*new_actions
;
2119 struct dp_netdev_actions
*old_actions
;
2121 new_actions
= dp_netdev_actions_create(put
->actions
,
2124 old_actions
= dp_netdev_flow_get_actions(netdev_flow
);
2125 ovsrcu_set(&netdev_flow
->actions
, new_actions
);
2128 get_dpif_flow_stats(netdev_flow
, put
->stats
);
2130 if (put
->flags
& DPIF_FP_ZERO_STATS
) {
2131 /* XXX: The userspace datapath uses thread local statistics
2132 * (for flows), which should be updated only by the owning
2133 * thread. Since we cannot write on stats memory here,
2134 * we choose not to support this flag. Please note:
2135 * - This feature is currently used only by dpctl commands with
2137 * - Should the need arise, this operation can be implemented
2138 * by keeping a base value (to be update here) for each
2139 * counter, and subtracting it before outputting the stats */
2143 ovsrcu_postpone(dp_netdev_actions_free
, old_actions
);
2144 } else if (put
->flags
& DPIF_FP_CREATE
) {
2147 /* Overlapping flow. */
2151 ovs_mutex_unlock(&pmd
->flow_mutex
);
2152 dp_netdev_pmd_unref(pmd
);
2158 dpif_netdev_flow_del(struct dpif
*dpif
, const struct dpif_flow_del
*del
)
2160 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2161 struct dp_netdev_flow
*netdev_flow
;
2162 struct dp_netdev_pmd_thread
*pmd
;
2163 unsigned pmd_id
= del
->pmd_id
== PMD_ID_NULL
2164 ? NON_PMD_CORE_ID
: del
->pmd_id
;
2167 pmd
= dp_netdev_get_pmd(dp
, pmd_id
);
2172 ovs_mutex_lock(&pmd
->flow_mutex
);
2173 netdev_flow
= dp_netdev_pmd_find_flow(pmd
, del
->ufid
, del
->key
,
2177 get_dpif_flow_stats(netdev_flow
, del
->stats
);
2179 dp_netdev_pmd_remove_flow(pmd
, netdev_flow
);
2183 ovs_mutex_unlock(&pmd
->flow_mutex
);
2184 dp_netdev_pmd_unref(pmd
);
2189 struct dpif_netdev_flow_dump
{
2190 struct dpif_flow_dump up
;
2191 struct cmap_position poll_thread_pos
;
2192 struct cmap_position flow_pos
;
2193 struct dp_netdev_pmd_thread
*cur_pmd
;
2195 struct ovs_mutex mutex
;
2198 static struct dpif_netdev_flow_dump
*
2199 dpif_netdev_flow_dump_cast(struct dpif_flow_dump
*dump
)
2201 return CONTAINER_OF(dump
, struct dpif_netdev_flow_dump
, up
);
2204 static struct dpif_flow_dump
*
2205 dpif_netdev_flow_dump_create(const struct dpif
*dpif_
, bool terse
)
2207 struct dpif_netdev_flow_dump
*dump
;
2209 dump
= xzalloc(sizeof *dump
);
2210 dpif_flow_dump_init(&dump
->up
, dpif_
);
2211 dump
->up
.terse
= terse
;
2212 ovs_mutex_init(&dump
->mutex
);
2218 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump
*dump_
)
2220 struct dpif_netdev_flow_dump
*dump
= dpif_netdev_flow_dump_cast(dump_
);
2222 ovs_mutex_destroy(&dump
->mutex
);
2227 struct dpif_netdev_flow_dump_thread
{
2228 struct dpif_flow_dump_thread up
;
2229 struct dpif_netdev_flow_dump
*dump
;
2230 struct odputil_keybuf keybuf
[FLOW_DUMP_MAX_BATCH
];
2231 struct odputil_keybuf maskbuf
[FLOW_DUMP_MAX_BATCH
];
2234 static struct dpif_netdev_flow_dump_thread
*
2235 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread
*thread
)
2237 return CONTAINER_OF(thread
, struct dpif_netdev_flow_dump_thread
, up
);
2240 static struct dpif_flow_dump_thread
*
2241 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump
*dump_
)
2243 struct dpif_netdev_flow_dump
*dump
= dpif_netdev_flow_dump_cast(dump_
);
2244 struct dpif_netdev_flow_dump_thread
*thread
;
2246 thread
= xmalloc(sizeof *thread
);
2247 dpif_flow_dump_thread_init(&thread
->up
, &dump
->up
);
2248 thread
->dump
= dump
;
2253 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread
*thread_
)
2255 struct dpif_netdev_flow_dump_thread
*thread
2256 = dpif_netdev_flow_dump_thread_cast(thread_
);
2262 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread
*thread_
,
2263 struct dpif_flow
*flows
, int max_flows
)
2265 struct dpif_netdev_flow_dump_thread
*thread
2266 = dpif_netdev_flow_dump_thread_cast(thread_
);
2267 struct dpif_netdev_flow_dump
*dump
= thread
->dump
;
2268 struct dp_netdev_flow
*netdev_flows
[FLOW_DUMP_MAX_BATCH
];
2272 ovs_mutex_lock(&dump
->mutex
);
2273 if (!dump
->status
) {
2274 struct dpif_netdev
*dpif
= dpif_netdev_cast(thread
->up
.dpif
);
2275 struct dp_netdev
*dp
= get_dp_netdev(&dpif
->dpif
);
2276 struct dp_netdev_pmd_thread
*pmd
= dump
->cur_pmd
;
2277 int flow_limit
= MIN(max_flows
, FLOW_DUMP_MAX_BATCH
);
2279 /* First call to dump_next(), extracts the first pmd thread.
2280 * If there is no pmd thread, returns immediately. */
2282 pmd
= dp_netdev_pmd_get_next(dp
, &dump
->poll_thread_pos
);
2284 ovs_mutex_unlock(&dump
->mutex
);
2291 for (n_flows
= 0; n_flows
< flow_limit
; n_flows
++) {
2292 struct cmap_node
*node
;
2294 node
= cmap_next_position(&pmd
->flow_table
, &dump
->flow_pos
);
2298 netdev_flows
[n_flows
] = CONTAINER_OF(node
,
2299 struct dp_netdev_flow
,
2302 /* When finishing dumping the current pmd thread, moves to
2304 if (n_flows
< flow_limit
) {
2305 memset(&dump
->flow_pos
, 0, sizeof dump
->flow_pos
);
2306 dp_netdev_pmd_unref(pmd
);
2307 pmd
= dp_netdev_pmd_get_next(dp
, &dump
->poll_thread_pos
);
2313 /* Keeps the reference to next caller. */
2314 dump
->cur_pmd
= pmd
;
2316 /* If the current dump is empty, do not exit the loop, since the
2317 * remaining pmds could have flows to be dumped. Just dumps again
2318 * on the new 'pmd'. */
2321 ovs_mutex_unlock(&dump
->mutex
);
2323 for (i
= 0; i
< n_flows
; i
++) {
2324 struct odputil_keybuf
*maskbuf
= &thread
->maskbuf
[i
];
2325 struct odputil_keybuf
*keybuf
= &thread
->keybuf
[i
];
2326 struct dp_netdev_flow
*netdev_flow
= netdev_flows
[i
];
2327 struct dpif_flow
*f
= &flows
[i
];
2328 struct ofpbuf key
, mask
;
2330 ofpbuf_use_stack(&key
, keybuf
, sizeof *keybuf
);
2331 ofpbuf_use_stack(&mask
, maskbuf
, sizeof *maskbuf
);
2332 dp_netdev_flow_to_dpif_flow(netdev_flow
, &key
, &mask
, f
,
2340 dpif_netdev_execute(struct dpif
*dpif
, struct dpif_execute
*execute
)
2341 OVS_NO_THREAD_SAFETY_ANALYSIS
2343 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2344 struct dp_netdev_pmd_thread
*pmd
;
2345 struct dp_packet
*pp
;
2347 if (dp_packet_size(execute
->packet
) < ETH_HEADER_LEN
||
2348 dp_packet_size(execute
->packet
) > UINT16_MAX
) {
2352 /* Tries finding the 'pmd'. If NULL is returned, that means
2353 * the current thread is a non-pmd thread and should use
2354 * dp_netdev_get_pmd(dp, NON_PMD_CORE_ID). */
2355 pmd
= ovsthread_getspecific(dp
->per_pmd_key
);
2357 pmd
= dp_netdev_get_pmd(dp
, NON_PMD_CORE_ID
);
2360 /* If the current thread is non-pmd thread, acquires
2361 * the 'non_pmd_mutex'. */
2362 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2363 ovs_mutex_lock(&dp
->non_pmd_mutex
);
2364 ovs_mutex_lock(&dp
->port_mutex
);
2367 pp
= execute
->packet
;
2368 dp_netdev_execute_actions(pmd
, &pp
, 1, false, execute
->actions
,
2369 execute
->actions_len
);
2370 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2371 dp_netdev_pmd_unref(pmd
);
2372 ovs_mutex_unlock(&dp
->port_mutex
);
2373 ovs_mutex_unlock(&dp
->non_pmd_mutex
);
2380 dpif_netdev_operate(struct dpif
*dpif
, struct dpif_op
**ops
, size_t n_ops
)
2384 for (i
= 0; i
< n_ops
; i
++) {
2385 struct dpif_op
*op
= ops
[i
];
2388 case DPIF_OP_FLOW_PUT
:
2389 op
->error
= dpif_netdev_flow_put(dpif
, &op
->u
.flow_put
);
2392 case DPIF_OP_FLOW_DEL
:
2393 op
->error
= dpif_netdev_flow_del(dpif
, &op
->u
.flow_del
);
2396 case DPIF_OP_EXECUTE
:
2397 op
->error
= dpif_netdev_execute(dpif
, &op
->u
.execute
);
2400 case DPIF_OP_FLOW_GET
:
2401 op
->error
= dpif_netdev_flow_get(dpif
, &op
->u
.flow_get
);
2407 /* Returns true if the configuration for rx queues or cpu mask
2410 pmd_config_changed(const struct dp_netdev
*dp
, const char *cmask
)
2412 struct dp_netdev_port
*port
;
2414 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2415 struct netdev
*netdev
= port
->netdev
;
2416 int requested_n_rxq
= netdev_requested_n_rxq(netdev
);
2417 if (netdev_is_pmd(netdev
)
2418 && port
->latest_requested_n_rxq
!= requested_n_rxq
) {
2423 if (dp
->pmd_cmask
!= NULL
&& cmask
!= NULL
) {
2424 return strcmp(dp
->pmd_cmask
, cmask
);
2426 return (dp
->pmd_cmask
!= NULL
|| cmask
!= NULL
);
2430 /* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
2432 dpif_netdev_pmd_set(struct dpif
*dpif
, const char *cmask
)
2434 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2436 if (pmd_config_changed(dp
, cmask
)) {
2437 struct dp_netdev_port
*port
;
2439 dp_netdev_destroy_all_pmds(dp
);
2441 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2442 struct netdev
*netdev
= port
->netdev
;
2443 int requested_n_rxq
= netdev_requested_n_rxq(netdev
);
2444 if (netdev_is_pmd(port
->netdev
)
2445 && port
->latest_requested_n_rxq
!= requested_n_rxq
) {
2448 /* Closes the existing 'rxq's. */
2449 for (i
= 0; i
< netdev_n_rxq(port
->netdev
); i
++) {
2450 netdev_rxq_close(port
->rxq
[i
]);
2451 port
->rxq
[i
] = NULL
;
2455 /* Sets the new rx queue config. */
2456 err
= netdev_set_multiq(port
->netdev
,
2457 ovs_numa_get_n_cores() + 1,
2459 if (err
&& (err
!= EOPNOTSUPP
)) {
2460 VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
2461 " %u", netdev_get_name(port
->netdev
),
2465 port
->latest_requested_n_rxq
= requested_n_rxq
;
2466 /* If the set_multiq() above succeeds, reopens the 'rxq's. */
2467 port
->n_rxq
= netdev_n_rxq(port
->netdev
);
2468 port
->rxq
= xrealloc(port
->rxq
, sizeof *port
->rxq
* port
->n_rxq
);
2469 for (i
= 0; i
< port
->n_rxq
; i
++) {
2470 netdev_rxq_open(port
->netdev
, &port
->rxq
[i
], i
);
2474 /* Reconfigures the cpu mask. */
2475 ovs_numa_set_cpu_mask(cmask
);
2476 free(dp
->pmd_cmask
);
2477 dp
->pmd_cmask
= cmask
? xstrdup(cmask
) : NULL
;
2479 /* Restores the non-pmd. */
2480 dp_netdev_set_nonpmd(dp
);
2481 /* Restores all pmd threads. */
2482 dp_netdev_reset_pmd_threads(dp
);
2489 dpif_netdev_queue_to_priority(const struct dpif
*dpif OVS_UNUSED
,
2490 uint32_t queue_id
, uint32_t *priority
)
2492 *priority
= queue_id
;
2497 /* Creates and returns a new 'struct dp_netdev_actions', whose actions are
2498 * a copy of the 'ofpacts_len' bytes of 'ofpacts'. */
2499 struct dp_netdev_actions
*
2500 dp_netdev_actions_create(const struct nlattr
*actions
, size_t size
)
2502 struct dp_netdev_actions
*netdev_actions
;
2504 netdev_actions
= xmalloc(sizeof *netdev_actions
+ size
);
2505 memcpy(netdev_actions
->actions
, actions
, size
);
2506 netdev_actions
->size
= size
;
2508 return netdev_actions
;
2511 struct dp_netdev_actions
*
2512 dp_netdev_flow_get_actions(const struct dp_netdev_flow
*flow
)
2514 return ovsrcu_get(struct dp_netdev_actions
*, &flow
->actions
);
2518 dp_netdev_actions_free(struct dp_netdev_actions
*actions
)
2523 static inline unsigned long long
2524 cycles_counter(void)
2527 return rte_get_tsc_cycles();
2533 /* Fake mutex to make sure that the calls to cycles_count_* are balanced */
2534 extern struct ovs_mutex cycles_counter_fake_mutex
;
2536 /* Start counting cycles. Must be followed by 'cycles_count_end()' */
2538 cycles_count_start(struct dp_netdev_pmd_thread
*pmd
)
2539 OVS_ACQUIRES(&cycles_counter_fake_mutex
)
2540 OVS_NO_THREAD_SAFETY_ANALYSIS
2542 pmd
->last_cycles
= cycles_counter();
2545 /* Stop counting cycles and add them to the counter 'type' */
2547 cycles_count_end(struct dp_netdev_pmd_thread
*pmd
,
2548 enum pmd_cycles_counter_type type
)
2549 OVS_RELEASES(&cycles_counter_fake_mutex
)
2550 OVS_NO_THREAD_SAFETY_ANALYSIS
2552 unsigned long long interval
= cycles_counter() - pmd
->last_cycles
;
2554 non_atomic_ullong_add(&pmd
->cycles
.n
[type
], interval
);
2558 dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread
*pmd
,
2559 struct dp_netdev_port
*port
,
2560 struct netdev_rxq
*rxq
)
2562 struct dp_packet
*packets
[NETDEV_MAX_BURST
];
2565 cycles_count_start(pmd
);
2566 error
= netdev_rxq_recv(rxq
, packets
, &cnt
);
2567 cycles_count_end(pmd
, PMD_CYCLES_POLLING
);
2569 *recirc_depth_get() = 0;
2571 cycles_count_start(pmd
);
2572 dp_netdev_input(pmd
, packets
, cnt
, port
->port_no
);
2573 cycles_count_end(pmd
, PMD_CYCLES_PROCESSING
);
2574 } else if (error
!= EAGAIN
&& error
!= EOPNOTSUPP
) {
2575 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2577 VLOG_ERR_RL(&rl
, "error receiving data from %s: %s",
2578 netdev_get_name(port
->netdev
), ovs_strerror(error
));
2582 /* Return true if needs to revalidate datapath flows. */
2584 dpif_netdev_run(struct dpif
*dpif
)
2586 struct dp_netdev_port
*port
;
2587 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2588 struct dp_netdev_pmd_thread
*non_pmd
= dp_netdev_get_pmd(dp
,
2590 uint64_t new_tnl_seq
;
2592 ovs_mutex_lock(&dp
->non_pmd_mutex
);
2593 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2594 if (!netdev_is_pmd(port
->netdev
)) {
2597 for (i
= 0; i
< port
->n_rxq
; i
++) {
2598 dp_netdev_process_rxq_port(non_pmd
, port
, port
->rxq
[i
]);
2602 ovs_mutex_unlock(&dp
->non_pmd_mutex
);
2603 dp_netdev_pmd_unref(non_pmd
);
2605 tnl_neigh_cache_run();
2607 new_tnl_seq
= seq_read(tnl_conf_seq
);
2609 if (dp
->last_tnl_conf_seq
!= new_tnl_seq
) {
2610 dp
->last_tnl_conf_seq
= new_tnl_seq
;
2617 dpif_netdev_wait(struct dpif
*dpif
)
2619 struct dp_netdev_port
*port
;
2620 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2622 ovs_mutex_lock(&dp_netdev_mutex
);
2623 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
2624 if (!netdev_is_pmd(port
->netdev
)) {
2627 for (i
= 0; i
< port
->n_rxq
; i
++) {
2628 netdev_rxq_wait(port
->rxq
[i
]);
2632 ovs_mutex_unlock(&dp_netdev_mutex
);
2633 seq_wait(tnl_conf_seq
, dp
->last_tnl_conf_seq
);
2637 pmd_load_queues(struct dp_netdev_pmd_thread
*pmd
, struct rxq_poll
**ppoll_list
)
2638 OVS_REQUIRES(pmd
->poll_mutex
)
2640 struct rxq_poll
*poll_list
= *ppoll_list
;
2641 struct rxq_poll
*poll
;
2644 poll_list
= xrealloc(poll_list
, pmd
->poll_cnt
* sizeof *poll_list
);
2647 LIST_FOR_EACH (poll
, node
, &pmd
->poll_list
) {
2648 poll_list
[i
++] = *poll
;
2651 *ppoll_list
= poll_list
;
2652 return pmd
->poll_cnt
;
2656 pmd_thread_main(void *f_
)
2658 struct dp_netdev_pmd_thread
*pmd
= f_
;
2659 unsigned int lc
= 0;
2660 struct rxq_poll
*poll_list
;
2661 unsigned int port_seq
= PMD_INITIAL_SEQ
;
2668 /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
2669 ovsthread_setspecific(pmd
->dp
->per_pmd_key
, pmd
);
2670 pmd_thread_setaffinity_cpu(pmd
->core_id
);
2672 emc_cache_init(&pmd
->flow_cache
);
2674 ovs_mutex_lock(&pmd
->poll_mutex
);
2675 poll_cnt
= pmd_load_queues(pmd
, &poll_list
);
2676 ovs_mutex_unlock(&pmd
->poll_mutex
);
2678 /* List port/core affinity */
2679 for (i
= 0; i
< poll_cnt
; i
++) {
2680 VLOG_DBG("Core %d processing port \'%s\' with queue-id %d\n",
2681 pmd
->core_id
, netdev_get_name(poll_list
[i
].port
->netdev
),
2682 netdev_rxq_get_queue_id(poll_list
[i
].rx
));
2685 /* Signal here to make sure the pmd finishes
2686 * reloading the updated configuration. */
2687 dp_netdev_pmd_reload_done(pmd
);
2690 for (i
= 0; i
< poll_cnt
; i
++) {
2691 dp_netdev_process_rxq_port(pmd
, poll_list
[i
].port
, poll_list
[i
].rx
);
2699 emc_cache_slow_sweep(&pmd
->flow_cache
);
2700 coverage_try_clear();
2703 atomic_read_relaxed(&pmd
->change_seq
, &seq
);
2704 if (seq
!= port_seq
) {
2711 emc_cache_uninit(&pmd
->flow_cache
);
2713 if (!latch_is_set(&pmd
->exit_latch
)){
2717 dp_netdev_pmd_reload_done(pmd
);
2724 dp_netdev_disable_upcall(struct dp_netdev
*dp
)
2725 OVS_ACQUIRES(dp
->upcall_rwlock
)
2727 fat_rwlock_wrlock(&dp
->upcall_rwlock
);
2731 dpif_netdev_disable_upcall(struct dpif
*dpif
)
2732 OVS_NO_THREAD_SAFETY_ANALYSIS
2734 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2735 dp_netdev_disable_upcall(dp
);
2739 dp_netdev_enable_upcall(struct dp_netdev
*dp
)
2740 OVS_RELEASES(dp
->upcall_rwlock
)
2742 fat_rwlock_unlock(&dp
->upcall_rwlock
);
2746 dpif_netdev_enable_upcall(struct dpif
*dpif
)
2747 OVS_NO_THREAD_SAFETY_ANALYSIS
2749 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
2750 dp_netdev_enable_upcall(dp
);
2754 dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread
*pmd
)
2756 ovs_mutex_lock(&pmd
->cond_mutex
);
2757 xpthread_cond_signal(&pmd
->cond
);
2758 ovs_mutex_unlock(&pmd
->cond_mutex
);
2761 /* Finds and refs the dp_netdev_pmd_thread on core 'core_id'. Returns
2762 * the pointer if succeeds, otherwise, NULL.
2764 * Caller must unrefs the returned reference. */
2765 static struct dp_netdev_pmd_thread
*
2766 dp_netdev_get_pmd(struct dp_netdev
*dp
, unsigned core_id
)
2768 struct dp_netdev_pmd_thread
*pmd
;
2769 const struct cmap_node
*pnode
;
2771 pnode
= cmap_find(&dp
->poll_threads
, hash_int(core_id
, 0));
2775 pmd
= CONTAINER_OF(pnode
, struct dp_netdev_pmd_thread
, node
);
2777 return dp_netdev_pmd_try_ref(pmd
) ? pmd
: NULL
;
2780 /* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
2782 dp_netdev_set_nonpmd(struct dp_netdev
*dp
)
2784 struct dp_netdev_pmd_thread
*non_pmd
;
2786 non_pmd
= xzalloc(sizeof *non_pmd
);
2787 dp_netdev_configure_pmd(non_pmd
, dp
, 0, NON_PMD_CORE_ID
,
2791 /* Caller must have valid pointer to 'pmd'. */
2793 dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread
*pmd
)
2795 return ovs_refcount_try_ref_rcu(&pmd
->ref_cnt
);
2799 dp_netdev_pmd_unref(struct dp_netdev_pmd_thread
*pmd
)
2801 if (pmd
&& ovs_refcount_unref(&pmd
->ref_cnt
) == 1) {
2802 ovsrcu_postpone(dp_netdev_destroy_pmd
, pmd
);
2806 /* Given cmap position 'pos', tries to ref the next node. If try_ref()
2807 * fails, keeps checking for next node until reaching the end of cmap.
2809 * Caller must unrefs the returned reference. */
2810 static struct dp_netdev_pmd_thread
*
2811 dp_netdev_pmd_get_next(struct dp_netdev
*dp
, struct cmap_position
*pos
)
2813 struct dp_netdev_pmd_thread
*next
;
2816 struct cmap_node
*node
;
2818 node
= cmap_next_position(&dp
->poll_threads
, pos
);
2819 next
= node
? CONTAINER_OF(node
, struct dp_netdev_pmd_thread
, node
)
2821 } while (next
&& !dp_netdev_pmd_try_ref(next
));
2826 /* Configures the 'pmd' based on the input argument. */
2828 dp_netdev_configure_pmd(struct dp_netdev_pmd_thread
*pmd
, struct dp_netdev
*dp
,
2829 int index
, unsigned core_id
, int numa_id
)
2833 pmd
->core_id
= core_id
;
2834 pmd
->numa_id
= numa_id
;
2837 atomic_init(&pmd
->tx_qid
,
2838 (core_id
== NON_PMD_CORE_ID
)
2839 ? ovs_numa_get_n_cores()
2840 : get_n_pmd_threads(dp
));
2842 ovs_refcount_init(&pmd
->ref_cnt
);
2843 latch_init(&pmd
->exit_latch
);
2844 atomic_init(&pmd
->change_seq
, PMD_INITIAL_SEQ
);
2845 xpthread_cond_init(&pmd
->cond
, NULL
);
2846 ovs_mutex_init(&pmd
->cond_mutex
);
2847 ovs_mutex_init(&pmd
->flow_mutex
);
2848 ovs_mutex_init(&pmd
->poll_mutex
);
2849 dpcls_init(&pmd
->cls
);
2850 cmap_init(&pmd
->flow_table
);
2851 ovs_list_init(&pmd
->poll_list
);
2852 /* init the 'flow_cache' since there is no
2853 * actual thread created for NON_PMD_CORE_ID. */
2854 if (core_id
== NON_PMD_CORE_ID
) {
2855 emc_cache_init(&pmd
->flow_cache
);
2857 cmap_insert(&dp
->poll_threads
, CONST_CAST(struct cmap_node
*, &pmd
->node
),
2858 hash_int(core_id
, 0));
2862 dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread
*pmd
)
2864 dp_netdev_pmd_flow_flush(pmd
);
2865 dpcls_destroy(&pmd
->cls
);
2866 cmap_destroy(&pmd
->flow_table
);
2867 ovs_mutex_destroy(&pmd
->flow_mutex
);
2868 latch_destroy(&pmd
->exit_latch
);
2869 xpthread_cond_destroy(&pmd
->cond
);
2870 ovs_mutex_destroy(&pmd
->cond_mutex
);
2871 ovs_mutex_destroy(&pmd
->poll_mutex
);
2875 /* Stops the pmd thread, removes it from the 'dp->poll_threads',
2876 * and unrefs the struct. */
2878 dp_netdev_del_pmd(struct dp_netdev
*dp
, struct dp_netdev_pmd_thread
*pmd
)
2880 /* Uninit the 'flow_cache' since there is
2881 * no actual thread uninit it for NON_PMD_CORE_ID. */
2882 if (pmd
->core_id
== NON_PMD_CORE_ID
) {
2883 emc_cache_uninit(&pmd
->flow_cache
);
2885 latch_set(&pmd
->exit_latch
);
2886 dp_netdev_reload_pmd__(pmd
);
2887 ovs_numa_unpin_core(pmd
->core_id
);
2888 xpthread_join(pmd
->thread
, NULL
);
2891 /* Unref all ports and free poll_list. */
2892 dp_netdev_pmd_clear_poll_list(pmd
);
2894 /* Purges the 'pmd''s flows after stopping the thread, but before
2895 * destroying the flows, so that the flow stats can be collected. */
2896 if (dp
->dp_purge_cb
) {
2897 dp
->dp_purge_cb(dp
->dp_purge_aux
, pmd
->core_id
);
2899 cmap_remove(&pmd
->dp
->poll_threads
, &pmd
->node
, hash_int(pmd
->core_id
, 0));
2900 dp_netdev_pmd_unref(pmd
);
2903 /* Destroys all pmd threads. */
2905 dp_netdev_destroy_all_pmds(struct dp_netdev
*dp
)
2907 struct dp_netdev_pmd_thread
*pmd
;
2908 struct dp_netdev_pmd_thread
**pmd_list
;
2909 size_t k
= 0, n_pmds
;
2911 n_pmds
= cmap_count(&dp
->poll_threads
);
2912 pmd_list
= xcalloc(n_pmds
, sizeof *pmd_list
);
2914 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2915 /* We cannot call dp_netdev_del_pmd(), since it alters
2916 * 'dp->poll_threads' (while we're iterating it) and it
2918 ovs_assert(k
< n_pmds
);
2919 pmd_list
[k
++] = pmd
;
2922 for (size_t i
= 0; i
< k
; i
++) {
2923 dp_netdev_del_pmd(dp
, pmd_list
[i
]);
2928 /* Deletes all pmd threads on numa node 'numa_id' and
2929 * fixes tx_qids of other threads to keep them sequential. */
2931 dp_netdev_del_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
)
2933 struct dp_netdev_pmd_thread
*pmd
;
2934 int n_pmds_on_numa
, n_pmds
;
2935 int *free_idx
, k
= 0;
2936 struct dp_netdev_pmd_thread
**pmd_list
;
2938 n_pmds_on_numa
= get_n_pmd_threads_on_numa(dp
, numa_id
);
2939 free_idx
= xcalloc(n_pmds_on_numa
, sizeof *free_idx
);
2940 pmd_list
= xcalloc(n_pmds_on_numa
, sizeof *pmd_list
);
2942 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2943 /* We cannot call dp_netdev_del_pmd(), since it alters
2944 * 'dp->poll_threads' (while we're iterating it) and it
2946 if (pmd
->numa_id
== numa_id
) {
2947 atomic_read_relaxed(&pmd
->tx_qid
, &free_idx
[k
]);
2949 ovs_assert(k
< n_pmds_on_numa
);
2954 for (int i
= 0; i
< k
; i
++) {
2955 dp_netdev_del_pmd(dp
, pmd_list
[i
]);
2958 n_pmds
= get_n_pmd_threads(dp
);
2959 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
2962 atomic_read_relaxed(&pmd
->tx_qid
, &old_tx_qid
);
2964 if (old_tx_qid
>= n_pmds
) {
2965 int new_tx_qid
= free_idx
[--k
];
2967 atomic_store_relaxed(&pmd
->tx_qid
, new_tx_qid
);
2975 /* Deletes all rx queues from pmd->poll_list. */
2977 dp_netdev_pmd_clear_poll_list(struct dp_netdev_pmd_thread
*pmd
)
2979 struct rxq_poll
*poll
;
2981 ovs_mutex_lock(&pmd
->poll_mutex
);
2982 LIST_FOR_EACH_POP (poll
, node
, &pmd
->poll_list
) {
2986 ovs_mutex_unlock(&pmd
->poll_mutex
);
2989 /* Deletes all rx queues of 'port' from poll_list of pmd thread and
2990 * reloads it if poll_list was changed. */
2992 dp_netdev_del_port_from_pmd(struct dp_netdev_port
*port
,
2993 struct dp_netdev_pmd_thread
*pmd
)
2995 struct rxq_poll
*poll
, *next
;
2998 ovs_mutex_lock(&pmd
->poll_mutex
);
2999 LIST_FOR_EACH_SAFE (poll
, next
, node
, &pmd
->poll_list
) {
3000 if (poll
->port
== port
) {
3002 ovs_list_remove(&poll
->node
);
3007 ovs_mutex_unlock(&pmd
->poll_mutex
);
3009 dp_netdev_reload_pmd__(pmd
);
3013 /* Deletes all rx queues of 'port' from all pmd threads of dp and
3014 * reloads them if needed. */
3016 dp_netdev_del_port_from_all_pmds(struct dp_netdev
*dp
,
3017 struct dp_netdev_port
*port
)
3019 int numa_id
= netdev_get_numa_id(port
->netdev
);
3020 struct dp_netdev_pmd_thread
*pmd
;
3022 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
3023 if (pmd
->numa_id
== numa_id
) {
3024 dp_netdev_del_port_from_pmd(port
, pmd
);
3029 /* Returns PMD thread from this numa node with fewer rx queues to poll.
3030 * Returns NULL if there is no PMD threads on this numa node.
3031 * Can be called safely only by main thread. */
3032 static struct dp_netdev_pmd_thread
*
3033 dp_netdev_less_loaded_pmd_on_numa(struct dp_netdev
*dp
, int numa_id
)
3036 struct dp_netdev_pmd_thread
*pmd
, *res
= NULL
;
3038 CMAP_FOR_EACH (pmd
, node
, &dp
->poll_threads
) {
3039 if (pmd
->numa_id
== numa_id
3040 && (min_cnt
> pmd
->poll_cnt
|| res
== NULL
)) {
3041 min_cnt
= pmd
->poll_cnt
;
3049 /* Adds rx queue to poll_list of PMD thread. */
3051 dp_netdev_add_rxq_to_pmd(struct dp_netdev_pmd_thread
*pmd
,
3052 struct dp_netdev_port
*port
, struct netdev_rxq
*rx
)
3053 OVS_REQUIRES(pmd
->poll_mutex
)
3055 struct rxq_poll
*poll
= xmalloc(sizeof *poll
);
3060 ovs_list_push_back(&pmd
->poll_list
, &poll
->node
);
3064 /* Distributes all rx queues of 'port' between all PMD threads and reloads
3065 * them if needed. */
3067 dp_netdev_add_port_to_pmds(struct dp_netdev
*dp
, struct dp_netdev_port
*port
)
3069 int numa_id
= netdev_get_numa_id(port
->netdev
);
3070 struct dp_netdev_pmd_thread
*pmd
;
3071 struct hmapx to_reload
;
3072 struct hmapx_node
*node
;
3075 hmapx_init(&to_reload
);
3076 /* Cannot create pmd threads for invalid numa node. */
3077 ovs_assert(ovs_numa_numa_id_is_valid(numa_id
));
3079 for (i
= 0; i
< port
->n_rxq
; i
++) {
3080 pmd
= dp_netdev_less_loaded_pmd_on_numa(dp
, numa_id
);
3082 /* There is no pmd threads on this numa node. */
3083 dp_netdev_set_pmds_on_numa(dp
, numa_id
);
3084 /* Assigning of rx queues done. */
3088 ovs_mutex_lock(&pmd
->poll_mutex
);
3089 dp_netdev_add_rxq_to_pmd(pmd
, port
, port
->rxq
[i
]);
3090 ovs_mutex_unlock(&pmd
->poll_mutex
);
3092 hmapx_add(&to_reload
, pmd
);
3095 HMAPX_FOR_EACH (node
, &to_reload
) {
3096 pmd
= (struct dp_netdev_pmd_thread
*) node
->data
;
3097 dp_netdev_reload_pmd__(pmd
);
3100 hmapx_destroy(&to_reload
);
3103 /* Checks the numa node id of 'netdev' and starts pmd threads for
3106 dp_netdev_set_pmds_on_numa(struct dp_netdev
*dp
, int numa_id
)
3110 if (!ovs_numa_numa_id_is_valid(numa_id
)) {
3111 VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
3112 "invalid", numa_id
);
3116 n_pmds
= get_n_pmd_threads_on_numa(dp
, numa_id
);
3118 /* If there are already pmd threads created for the numa node
3119 * in which 'netdev' is on, do nothing. Else, creates the
3120 * pmd threads for the numa node. */
3122 int can_have
, n_unpinned
, i
, index
= 0;
3123 struct dp_netdev_pmd_thread
**pmds
;
3124 struct dp_netdev_port
*port
;
3126 n_unpinned
= ovs_numa_get_n_unpinned_cores_on_numa(numa_id
);
3128 VLOG_ERR("Cannot create pmd threads due to out of unpinned "
3129 "cores on numa node %d", numa_id
);
3133 /* If cpu mask is specified, uses all unpinned cores, otherwise
3134 * tries creating NR_PMD_THREADS pmd threads. */
3135 can_have
= dp
->pmd_cmask
? n_unpinned
: MIN(n_unpinned
, NR_PMD_THREADS
);
3136 pmds
= xzalloc(can_have
* sizeof *pmds
);
3137 for (i
= 0; i
< can_have
; i
++) {
3138 unsigned core_id
= ovs_numa_get_unpinned_core_on_numa(numa_id
);
3139 pmds
[i
] = xzalloc(sizeof **pmds
);
3140 dp_netdev_configure_pmd(pmds
[i
], dp
, i
, core_id
, numa_id
);
3143 /* Distributes rx queues of this numa node between new pmd threads. */
3144 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
3145 if (netdev_is_pmd(port
->netdev
)
3146 && netdev_get_numa_id(port
->netdev
) == numa_id
) {
3147 for (i
= 0; i
< port
->n_rxq
; i
++) {
3148 /* Make thread-safety analyser happy. */
3149 ovs_mutex_lock(&pmds
[index
]->poll_mutex
);
3150 dp_netdev_add_rxq_to_pmd(pmds
[index
], port
, port
->rxq
[i
]);
3151 ovs_mutex_unlock(&pmds
[index
]->poll_mutex
);
3152 index
= (index
+ 1) % can_have
;
3157 /* Actual start of pmd threads. */
3158 for (i
= 0; i
< can_have
; i
++) {
3159 pmds
[i
]->thread
= ovs_thread_create("pmd", pmd_thread_main
, pmds
[i
]);
3162 VLOG_INFO("Created %d pmd threads on numa node %d", can_have
, numa_id
);
3167 /* Called after pmd threads config change. Restarts pmd threads with
3168 * new configuration. */
3170 dp_netdev_reset_pmd_threads(struct dp_netdev
*dp
)
3172 struct dp_netdev_port
*port
;
3174 CMAP_FOR_EACH (port
, node
, &dp
->ports
) {
3175 if (netdev_is_pmd(port
->netdev
)) {
3176 int numa_id
= netdev_get_numa_id(port
->netdev
);
3178 dp_netdev_set_pmds_on_numa(dp
, numa_id
);
3184 dpif_netdev_get_datapath_version(void)
3186 return xstrdup("<built-in>");
3190 dp_netdev_flow_used(struct dp_netdev_flow
*netdev_flow
, int cnt
, int size
,
3191 uint16_t tcp_flags
, long long now
)
3195 atomic_store_relaxed(&netdev_flow
->stats
.used
, now
);
3196 non_atomic_ullong_add(&netdev_flow
->stats
.packet_count
, cnt
);
3197 non_atomic_ullong_add(&netdev_flow
->stats
.byte_count
, size
);
3198 atomic_read_relaxed(&netdev_flow
->stats
.tcp_flags
, &flags
);
3200 atomic_store_relaxed(&netdev_flow
->stats
.tcp_flags
, flags
);
3204 dp_netdev_count_packet(struct dp_netdev_pmd_thread
*pmd
,
3205 enum dp_stat_type type
, int cnt
)
3207 non_atomic_ullong_add(&pmd
->stats
.n
[type
], cnt
);
3211 dp_netdev_upcall(struct dp_netdev_pmd_thread
*pmd
, struct dp_packet
*packet_
,
3212 struct flow
*flow
, struct flow_wildcards
*wc
, ovs_u128
*ufid
,
3213 enum dpif_upcall_type type
, const struct nlattr
*userdata
,
3214 struct ofpbuf
*actions
, struct ofpbuf
*put_actions
)
3216 struct dp_netdev
*dp
= pmd
->dp
;
3217 struct flow_tnl orig_tunnel
;
3220 if (OVS_UNLIKELY(!dp
->upcall_cb
)) {
3224 /* Upcall processing expects the Geneve options to be in the translated
3225 * format but we need to retain the raw format for datapath use. */
3226 orig_tunnel
.flags
= flow
->tunnel
.flags
;
3227 if (flow
->tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3228 orig_tunnel
.metadata
.present
.len
= flow
->tunnel
.metadata
.present
.len
;
3229 memcpy(orig_tunnel
.metadata
.opts
.gnv
, flow
->tunnel
.metadata
.opts
.gnv
,
3230 flow
->tunnel
.metadata
.present
.len
);
3231 err
= tun_metadata_from_geneve_udpif(&orig_tunnel
, &orig_tunnel
,
3238 if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl
))) {
3239 struct ds ds
= DS_EMPTY_INITIALIZER
;
3242 struct odp_flow_key_parms odp_parms
= {
3245 .odp_in_port
= flow
->in_port
.odp_port
,
3246 .support
= dp_netdev_support
,
3249 ofpbuf_init(&key
, 0);
3250 odp_flow_key_from_flow(&odp_parms
, &key
);
3251 packet_str
= ofp_packet_to_string(dp_packet_data(packet_
),
3252 dp_packet_size(packet_
));
3254 odp_flow_key_format(key
.data
, key
.size
, &ds
);
3256 VLOG_DBG("%s: %s upcall:\n%s\n%s", dp
->name
,
3257 dpif_upcall_type_to_string(type
), ds_cstr(&ds
), packet_str
);
3259 ofpbuf_uninit(&key
);
3265 err
= dp
->upcall_cb(packet_
, flow
, ufid
, pmd
->core_id
, type
, userdata
,
3266 actions
, wc
, put_actions
, dp
->upcall_aux
);
3267 if (err
&& err
!= ENOSPC
) {
3271 /* Translate tunnel metadata masks to datapath format. */
3273 if (wc
->masks
.tunnel
.metadata
.present
.map
) {
3274 struct geneve_opt opts
[TLV_TOT_OPT_SIZE
/
3275 sizeof(struct geneve_opt
)];
3277 if (orig_tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3278 tun_metadata_to_geneve_udpif_mask(&flow
->tunnel
,
3280 orig_tunnel
.metadata
.opts
.gnv
,
3281 orig_tunnel
.metadata
.present
.len
,
3284 orig_tunnel
.metadata
.present
.len
= 0;
3287 memset(&wc
->masks
.tunnel
.metadata
, 0,
3288 sizeof wc
->masks
.tunnel
.metadata
);
3289 memcpy(&wc
->masks
.tunnel
.metadata
.opts
.gnv
, opts
,
3290 orig_tunnel
.metadata
.present
.len
);
3292 wc
->masks
.tunnel
.metadata
.present
.len
= 0xff;
3295 /* Restore tunnel metadata. We need to use the saved options to ensure
3296 * that any unknown options are not lost. The generated mask will have
3297 * the same structure, matching on types and lengths but wildcarding
3298 * option data we don't care about. */
3299 if (orig_tunnel
.flags
& FLOW_TNL_F_UDPIF
) {
3300 memcpy(&flow
->tunnel
.metadata
.opts
.gnv
, orig_tunnel
.metadata
.opts
.gnv
,
3301 orig_tunnel
.metadata
.present
.len
);
3302 flow
->tunnel
.metadata
.present
.len
= orig_tunnel
.metadata
.present
.len
;
3303 flow
->tunnel
.flags
|= FLOW_TNL_F_UDPIF
;
3309 static inline uint32_t
3310 dpif_netdev_packet_get_rss_hash(struct dp_packet
*packet
,
3311 const struct miniflow
*mf
)
3313 uint32_t hash
, recirc_depth
;
3315 if (OVS_LIKELY(dp_packet_rss_valid(packet
))) {
3316 hash
= dp_packet_get_rss_hash(packet
);
3318 hash
= miniflow_hash_5tuple(mf
, 0);
3319 dp_packet_set_rss_hash(packet
, hash
);
3322 /* The RSS hash must account for the recirculation depth to avoid
3323 * collisions in the exact match cache */
3324 recirc_depth
= *recirc_depth_get_unsafe();
3325 if (OVS_UNLIKELY(recirc_depth
)) {
3326 hash
= hash_finish(hash
, recirc_depth
);
3327 dp_packet_set_rss_hash(packet
, hash
);
3332 struct packet_batch
{
3333 unsigned int packet_count
;
3334 unsigned int byte_count
;
3337 struct dp_netdev_flow
*flow
;
3339 struct dp_packet
*packets
[NETDEV_MAX_BURST
];
3343 packet_batch_update(struct packet_batch
*batch
, struct dp_packet
*packet
,
3344 const struct miniflow
*mf
)
3346 batch
->tcp_flags
|= miniflow_get_tcp_flags(mf
);
3347 batch
->packets
[batch
->packet_count
++] = packet
;
3348 batch
->byte_count
+= dp_packet_size(packet
);
3352 packet_batch_init(struct packet_batch
*batch
, struct dp_netdev_flow
*flow
)
3354 flow
->batch
= batch
;
3357 batch
->packet_count
= 0;
3358 batch
->byte_count
= 0;
3359 batch
->tcp_flags
= 0;
3363 packet_batch_execute(struct packet_batch
*batch
,
3364 struct dp_netdev_pmd_thread
*pmd
,
3367 struct dp_netdev_actions
*actions
;
3368 struct dp_netdev_flow
*flow
= batch
->flow
;
3370 dp_netdev_flow_used(flow
, batch
->packet_count
, batch
->byte_count
,
3371 batch
->tcp_flags
, now
);
3373 actions
= dp_netdev_flow_get_actions(flow
);
3375 dp_netdev_execute_actions(pmd
, batch
->packets
, batch
->packet_count
, true,
3376 actions
->actions
, actions
->size
);
3380 dp_netdev_queue_batches(struct dp_packet
*pkt
,
3381 struct dp_netdev_flow
*flow
, const struct miniflow
*mf
,
3382 struct packet_batch
*batches
, size_t *n_batches
)
3384 struct packet_batch
*batch
= flow
->batch
;
3386 if (OVS_UNLIKELY(!batch
)) {
3387 batch
= &batches
[(*n_batches
)++];
3388 packet_batch_init(batch
, flow
);
3391 packet_batch_update(batch
, pkt
, mf
);
3394 /* Try to process all ('cnt') the 'packets' using only the exact match cache
3395 * 'pmd->flow_cache'. If a flow is not found for a packet 'packets[i]', the
3396 * miniflow is copied into 'keys' and the packet pointer is moved at the
3397 * beginning of the 'packets' array.
3399 * The function returns the number of packets that needs to be processed in the
3400 * 'packets' array (they have been moved to the beginning of the vector).
3402 * If 'md_is_valid' is false, the metadata in 'packets' is not valid and must be
3403 * initialized by this function using 'port_no'.
3405 static inline size_t
3406 emc_processing(struct dp_netdev_pmd_thread
*pmd
, struct dp_packet
**packets
,
3407 size_t cnt
, struct netdev_flow_key
*keys
,
3408 struct packet_batch batches
[], size_t *n_batches
,
3409 bool md_is_valid
, odp_port_t port_no
)
3411 struct emc_cache
*flow_cache
= &pmd
->flow_cache
;
3412 struct netdev_flow_key
*key
= &keys
[0];
3413 size_t i
, n_missed
= 0, n_dropped
= 0;
3415 for (i
= 0; i
< cnt
; i
++) {
3416 struct dp_netdev_flow
*flow
;
3417 struct dp_packet
*packet
= packets
[i
];
3419 if (OVS_UNLIKELY(dp_packet_size(packet
) < ETH_HEADER_LEN
)) {
3420 dp_packet_delete(packet
);
3426 /* Prefetch next packet data and metadata. */
3427 OVS_PREFETCH(dp_packet_data(packets
[i
+1]));
3428 pkt_metadata_prefetch_init(&packets
[i
+1]->md
);
3432 pkt_metadata_init(&packet
->md
, port_no
);
3434 miniflow_extract(packet
, &key
->mf
);
3435 key
->len
= 0; /* Not computed yet. */
3436 key
->hash
= dpif_netdev_packet_get_rss_hash(packet
, &key
->mf
);
3438 flow
= emc_lookup(flow_cache
, key
);
3439 if (OVS_LIKELY(flow
)) {
3440 dp_netdev_queue_batches(packet
, flow
, &key
->mf
, batches
,
3443 /* Exact match cache missed. Group missed packets together at
3444 * the beginning of the 'packets' array. */
3445 packets
[n_missed
] = packet
;
3446 /* 'key[n_missed]' contains the key of the current packet and it
3447 * must be returned to the caller. The next key should be extracted
3448 * to 'keys[n_missed + 1]'. */
3449 key
= &keys
[++n_missed
];
3453 dp_netdev_count_packet(pmd
, DP_STAT_EXACT_HIT
, cnt
- n_dropped
- n_missed
);
3459 fast_path_processing(struct dp_netdev_pmd_thread
*pmd
,
3460 struct dp_packet
**packets
, size_t cnt
,
3461 struct netdev_flow_key
*keys
,
3462 struct packet_batch batches
[], size_t *n_batches
)
3464 #if !defined(__CHECKER__) && !defined(_WIN32)
3465 const size_t PKT_ARRAY_SIZE
= cnt
;
3467 /* Sparse or MSVC doesn't like variable length array. */
3468 enum { PKT_ARRAY_SIZE
= NETDEV_MAX_BURST
};
3470 struct dpcls_rule
*rules
[PKT_ARRAY_SIZE
];
3471 struct dp_netdev
*dp
= pmd
->dp
;
3472 struct emc_cache
*flow_cache
= &pmd
->flow_cache
;
3473 int miss_cnt
= 0, lost_cnt
= 0;
3477 for (i
= 0; i
< cnt
; i
++) {
3478 /* Key length is needed in all the cases, hash computed on demand. */
3479 keys
[i
].len
= netdev_flow_key_size(miniflow_n_values(&keys
[i
].mf
));
3481 any_miss
= !dpcls_lookup(&pmd
->cls
, keys
, rules
, cnt
);
3482 if (OVS_UNLIKELY(any_miss
) && !fat_rwlock_tryrdlock(&dp
->upcall_rwlock
)) {
3483 uint64_t actions_stub
[512 / 8], slow_stub
[512 / 8];
3484 struct ofpbuf actions
, put_actions
;
3487 ofpbuf_use_stub(&actions
, actions_stub
, sizeof actions_stub
);
3488 ofpbuf_use_stub(&put_actions
, slow_stub
, sizeof slow_stub
);
3490 for (i
= 0; i
< cnt
; i
++) {
3491 struct dp_netdev_flow
*netdev_flow
;
3492 struct ofpbuf
*add_actions
;
3496 if (OVS_LIKELY(rules
[i
])) {
3500 /* It's possible that an earlier slow path execution installed
3501 * a rule covering this flow. In this case, it's a lot cheaper
3502 * to catch it here than execute a miss. */
3503 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &keys
[i
]);
3505 rules
[i
] = &netdev_flow
->cr
;
3511 match
.tun_md
.valid
= false;
3512 miniflow_expand(&keys
[i
].mf
, &match
.flow
);
3514 ofpbuf_clear(&actions
);
3515 ofpbuf_clear(&put_actions
);
3517 dpif_flow_hash(dp
->dpif
, &match
.flow
, sizeof match
.flow
, &ufid
);
3518 error
= dp_netdev_upcall(pmd
, packets
[i
], &match
.flow
, &match
.wc
,
3519 &ufid
, DPIF_UC_MISS
, NULL
, &actions
,
3521 if (OVS_UNLIKELY(error
&& error
!= ENOSPC
)) {
3522 dp_packet_delete(packets
[i
]);
3527 /* The Netlink encoding of datapath flow keys cannot express
3528 * wildcarding the presence of a VLAN tag. Instead, a missing VLAN
3529 * tag is interpreted as exact match on the fact that there is no
3530 * VLAN. Unless we refactor a lot of code that translates between
3531 * Netlink and struct flow representations, we have to do the same
3533 if (!match
.wc
.masks
.vlan_tci
) {
3534 match
.wc
.masks
.vlan_tci
= htons(0xffff);
3537 /* We can't allow the packet batching in the next loop to execute
3538 * the actions. Otherwise, if there are any slow path actions,
3539 * we'll send the packet up twice. */
3540 dp_netdev_execute_actions(pmd
, &packets
[i
], 1, true,
3541 actions
.data
, actions
.size
);
3543 add_actions
= put_actions
.size
? &put_actions
: &actions
;
3544 if (OVS_LIKELY(error
!= ENOSPC
)) {
3545 /* XXX: There's a race window where a flow covering this packet
3546 * could have already been installed since we last did the flow
3547 * lookup before upcall. This could be solved by moving the
3548 * mutex lock outside the loop, but that's an awful long time
3549 * to be locking everyone out of making flow installs. If we
3550 * move to a per-core classifier, it would be reasonable. */
3551 ovs_mutex_lock(&pmd
->flow_mutex
);
3552 netdev_flow
= dp_netdev_pmd_lookup_flow(pmd
, &keys
[i
]);
3553 if (OVS_LIKELY(!netdev_flow
)) {
3554 netdev_flow
= dp_netdev_flow_add(pmd
, &match
, &ufid
,
3558 ovs_mutex_unlock(&pmd
->flow_mutex
);
3560 emc_insert(flow_cache
, &keys
[i
], netdev_flow
);
3564 ofpbuf_uninit(&actions
);
3565 ofpbuf_uninit(&put_actions
);
3566 fat_rwlock_unlock(&dp
->upcall_rwlock
);
3567 dp_netdev_count_packet(pmd
, DP_STAT_LOST
, lost_cnt
);
3568 } else if (OVS_UNLIKELY(any_miss
)) {
3569 for (i
= 0; i
< cnt
; i
++) {
3570 if (OVS_UNLIKELY(!rules
[i
])) {
3571 dp_packet_delete(packets
[i
]);
3578 for (i
= 0; i
< cnt
; i
++) {
3579 struct dp_packet
*packet
= packets
[i
];
3580 struct dp_netdev_flow
*flow
;
3582 if (OVS_UNLIKELY(!rules
[i
])) {
3586 flow
= dp_netdev_flow_cast(rules
[i
]);
3588 emc_insert(flow_cache
, &keys
[i
], flow
);
3589 dp_netdev_queue_batches(packet
, flow
, &keys
[i
].mf
, batches
, n_batches
);
3592 dp_netdev_count_packet(pmd
, DP_STAT_MASKED_HIT
, cnt
- miss_cnt
);
3593 dp_netdev_count_packet(pmd
, DP_STAT_MISS
, miss_cnt
);
3594 dp_netdev_count_packet(pmd
, DP_STAT_LOST
, lost_cnt
);
3597 /* Packets enter the datapath from a port (or from recirculation) here.
3599 * For performance reasons a caller may choose not to initialize the metadata
3600 * in 'packets': in this case 'mdinit' is false and this function needs to
3601 * initialize it using 'port_no'. If the metadata in 'packets' is already
3602 * valid, 'md_is_valid' must be true and 'port_no' will be ignored. */
3604 dp_netdev_input__(struct dp_netdev_pmd_thread
*pmd
,
3605 struct dp_packet
**packets
, int cnt
,
3606 bool md_is_valid
, odp_port_t port_no
)
3608 #if !defined(__CHECKER__) && !defined(_WIN32)
3609 const size_t PKT_ARRAY_SIZE
= cnt
;
3611 /* Sparse or MSVC doesn't like variable length array. */
3612 enum { PKT_ARRAY_SIZE
= NETDEV_MAX_BURST
};
3614 struct netdev_flow_key keys
[PKT_ARRAY_SIZE
];
3615 struct packet_batch batches
[PKT_ARRAY_SIZE
];
3616 long long now
= time_msec();
3617 size_t newcnt
, n_batches
, i
;
3620 newcnt
= emc_processing(pmd
, packets
, cnt
, keys
, batches
, &n_batches
,
3621 md_is_valid
, port_no
);
3622 if (OVS_UNLIKELY(newcnt
)) {
3623 fast_path_processing(pmd
, packets
, newcnt
, keys
, batches
, &n_batches
);
3626 for (i
= 0; i
< n_batches
; i
++) {
3627 batches
[i
].flow
->batch
= NULL
;
3630 for (i
= 0; i
< n_batches
; i
++) {
3631 packet_batch_execute(&batches
[i
], pmd
, now
);
3636 dp_netdev_input(struct dp_netdev_pmd_thread
*pmd
,
3637 struct dp_packet
**packets
, int cnt
,
3640 dp_netdev_input__(pmd
, packets
, cnt
, false, port_no
);
3644 dp_netdev_recirculate(struct dp_netdev_pmd_thread
*pmd
,
3645 struct dp_packet
**packets
, int cnt
)
3647 dp_netdev_input__(pmd
, packets
, cnt
, true, 0);
3650 struct dp_netdev_execute_aux
{
3651 struct dp_netdev_pmd_thread
*pmd
;
3655 dpif_netdev_register_dp_purge_cb(struct dpif
*dpif
, dp_purge_callback
*cb
,
3658 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
3659 dp
->dp_purge_aux
= aux
;
3660 dp
->dp_purge_cb
= cb
;
3664 dpif_netdev_register_upcall_cb(struct dpif
*dpif
, upcall_callback
*cb
,
3667 struct dp_netdev
*dp
= get_dp_netdev(dpif
);
3668 dp
->upcall_aux
= aux
;
3673 dp_netdev_drop_packets(struct dp_packet
**packets
, int cnt
, bool may_steal
)
3678 for (i
= 0; i
< cnt
; i
++) {
3679 dp_packet_delete(packets
[i
]);
3685 push_tnl_action(const struct dp_netdev
*dp
,
3686 const struct nlattr
*attr
,
3687 struct dp_packet
**packets
, int cnt
)
3689 struct dp_netdev_port
*tun_port
;
3690 const struct ovs_action_push_tnl
*data
;
3692 data
= nl_attr_get(attr
);
3694 tun_port
= dp_netdev_lookup_port(dp
, u32_to_odp(data
->tnl_port
));
3698 netdev_push_header(tun_port
->netdev
, packets
, cnt
, data
);
3704 dp_netdev_clone_pkt_batch(struct dp_packet
**dst_pkts
,
3705 struct dp_packet
**src_pkts
, int cnt
)
3709 for (i
= 0; i
< cnt
; i
++) {
3710 dst_pkts
[i
] = dp_packet_clone(src_pkts
[i
]);
3715 dp_execute_cb(void *aux_
, struct dp_packet
**packets
, int cnt
,
3716 const struct nlattr
*a
, bool may_steal
)
3717 OVS_NO_THREAD_SAFETY_ANALYSIS
3719 struct dp_netdev_execute_aux
*aux
= aux_
;
3720 uint32_t *depth
= recirc_depth_get();
3721 struct dp_netdev_pmd_thread
*pmd
= aux
->pmd
;
3722 struct dp_netdev
*dp
= pmd
->dp
;
3723 int type
= nl_attr_type(a
);
3724 struct dp_netdev_port
*p
;
3726 switch ((enum ovs_action_attr
)type
) {
3727 case OVS_ACTION_ATTR_OUTPUT
:
3728 p
= dp_netdev_lookup_port(dp
, u32_to_odp(nl_attr_get_u32(a
)));
3729 if (OVS_LIKELY(p
)) {
3732 atomic_read_relaxed(&pmd
->tx_qid
, &tx_qid
);
3734 netdev_send(p
->netdev
, tx_qid
, packets
, cnt
, may_steal
);
3739 case OVS_ACTION_ATTR_TUNNEL_PUSH
:
3740 if (*depth
< MAX_RECIRC_DEPTH
) {
3741 struct dp_packet
*tnl_pkt
[NETDEV_MAX_BURST
];
3745 dp_netdev_clone_pkt_batch(tnl_pkt
, packets
, cnt
);
3749 err
= push_tnl_action(dp
, a
, packets
, cnt
);
3752 dp_netdev_recirculate(pmd
, packets
, cnt
);
3755 dp_netdev_drop_packets(tnl_pkt
, cnt
, !may_steal
);
3761 case OVS_ACTION_ATTR_TUNNEL_POP
:
3762 if (*depth
< MAX_RECIRC_DEPTH
) {
3763 odp_port_t portno
= u32_to_odp(nl_attr_get_u32(a
));
3765 p
= dp_netdev_lookup_port(dp
, portno
);
3767 struct dp_packet
*tnl_pkt
[NETDEV_MAX_BURST
];
3771 dp_netdev_clone_pkt_batch(tnl_pkt
, packets
, cnt
);
3775 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
;
3805 userdata
= nl_attr_find_nested(a
, OVS_USERSPACE_ATTR_USERDATA
);
3806 ofpbuf_init(&actions
, 0);
3808 for (i
= 0; i
< cnt
; i
++) {
3811 ofpbuf_clear(&actions
);
3813 flow_extract(packets
[i
], &flow
);
3814 dpif_flow_hash(dp
->dpif
, &flow
, sizeof flow
, &ufid
);
3815 error
= dp_netdev_upcall(pmd
, packets
[i
], &flow
, NULL
, &ufid
,
3816 DPIF_UC_ACTION
, userdata
,&actions
,
3818 if (!error
|| error
== ENOSPC
) {
3819 dp_netdev_execute_actions(pmd
, &packets
[i
], 1, may_steal
,
3820 actions
.data
, actions
.size
);
3821 } else if (may_steal
) {
3822 dp_packet_delete(packets
[i
]);
3825 ofpbuf_uninit(&actions
);
3826 fat_rwlock_unlock(&dp
->upcall_rwlock
);
3832 case OVS_ACTION_ATTR_RECIRC
:
3833 if (*depth
< MAX_RECIRC_DEPTH
) {
3834 struct dp_packet
*recirc_pkts
[NETDEV_MAX_BURST
];
3838 dp_netdev_clone_pkt_batch(recirc_pkts
, packets
, cnt
);
3839 packets
= recirc_pkts
;
3842 for (i
= 0; i
< cnt
; i
++) {
3843 packets
[i
]->md
.recirc_id
= nl_attr_get_u32(a
);
3847 dp_netdev_recirculate(pmd
, packets
, cnt
);
3853 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
3856 case OVS_ACTION_ATTR_CT
:
3857 /* If a flow with this action is slow-pathed, datapath assistance is
3858 * required to implement it. However, we don't support this action
3859 * in the userspace datapath. */
3860 VLOG_WARN("Cannot execute conntrack action in userspace.");
3863 case OVS_ACTION_ATTR_PUSH_VLAN
:
3864 case OVS_ACTION_ATTR_POP_VLAN
:
3865 case OVS_ACTION_ATTR_PUSH_MPLS
:
3866 case OVS_ACTION_ATTR_POP_MPLS
:
3867 case OVS_ACTION_ATTR_SET
:
3868 case OVS_ACTION_ATTR_SET_MASKED
:
3869 case OVS_ACTION_ATTR_SAMPLE
:
3870 case OVS_ACTION_ATTR_HASH
:
3871 case OVS_ACTION_ATTR_UNSPEC
:
3872 case __OVS_ACTION_ATTR_MAX
:
3876 dp_netdev_drop_packets(packets
, cnt
, may_steal
);
3880 dp_netdev_execute_actions(struct dp_netdev_pmd_thread
*pmd
,
3881 struct dp_packet
**packets
, int cnt
,
3883 const struct nlattr
*actions
, size_t actions_len
)
3885 struct dp_netdev_execute_aux aux
= { pmd
};
3887 odp_execute_actions(&aux
, packets
, cnt
, may_steal
, actions
,
3888 actions_len
, dp_execute_cb
);
3891 const struct dpif_class dpif_netdev_class
= {
3894 dpif_netdev_enumerate
,
3895 dpif_netdev_port_open_type
,
3898 dpif_netdev_destroy
,
3901 dpif_netdev_get_stats
,
3902 dpif_netdev_port_add
,
3903 dpif_netdev_port_del
,
3904 dpif_netdev_port_query_by_number
,
3905 dpif_netdev_port_query_by_name
,
3906 NULL
, /* port_get_pid */
3907 dpif_netdev_port_dump_start
,
3908 dpif_netdev_port_dump_next
,
3909 dpif_netdev_port_dump_done
,
3910 dpif_netdev_port_poll
,
3911 dpif_netdev_port_poll_wait
,
3912 dpif_netdev_flow_flush
,
3913 dpif_netdev_flow_dump_create
,
3914 dpif_netdev_flow_dump_destroy
,
3915 dpif_netdev_flow_dump_thread_create
,
3916 dpif_netdev_flow_dump_thread_destroy
,
3917 dpif_netdev_flow_dump_next
,
3918 dpif_netdev_operate
,
3919 NULL
, /* recv_set */
3920 NULL
, /* handlers_set */
3921 dpif_netdev_pmd_set
,
3922 dpif_netdev_queue_to_priority
,
3924 NULL
, /* recv_wait */
3925 NULL
, /* recv_purge */
3926 dpif_netdev_register_dp_purge_cb
,
3927 dpif_netdev_register_upcall_cb
,
3928 dpif_netdev_enable_upcall
,
3929 dpif_netdev_disable_upcall
,
3930 dpif_netdev_get_datapath_version
,
3931 NULL
, /* ct_dump_start */
3932 NULL
, /* ct_dump_next */
3933 NULL
, /* ct_dump_done */
3934 NULL
, /* ct_flush */
3938 dpif_dummy_change_port_number(struct unixctl_conn
*conn
, int argc OVS_UNUSED
,
3939 const char *argv
[], void *aux OVS_UNUSED
)
3941 struct dp_netdev_port
*old_port
;
3942 struct dp_netdev_port
*new_port
;
3943 struct dp_netdev
*dp
;
3946 ovs_mutex_lock(&dp_netdev_mutex
);
3947 dp
= shash_find_data(&dp_netdevs
, argv
[1]);
3948 if (!dp
|| !dpif_netdev_class_is_dummy(dp
->class)) {
3949 ovs_mutex_unlock(&dp_netdev_mutex
);
3950 unixctl_command_reply_error(conn
, "unknown datapath or not a dummy");
3953 ovs_refcount_ref(&dp
->ref_cnt
);
3954 ovs_mutex_unlock(&dp_netdev_mutex
);
3956 ovs_mutex_lock(&dp
->port_mutex
);
3957 if (get_port_by_name(dp
, argv
[2], &old_port
)) {
3958 unixctl_command_reply_error(conn
, "unknown port");
3962 port_no
= u32_to_odp(atoi(argv
[3]));
3963 if (!port_no
|| port_no
== ODPP_NONE
) {
3964 unixctl_command_reply_error(conn
, "bad port number");
3967 if (dp_netdev_lookup_port(dp
, port_no
)) {
3968 unixctl_command_reply_error(conn
, "port number already in use");
3972 /* Remove old port. */
3973 cmap_remove(&dp
->ports
, &old_port
->node
, hash_port_no(old_port
->port_no
));
3974 ovsrcu_postpone(free
, old_port
);
3976 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
3977 new_port
= xmemdup(old_port
, sizeof *old_port
);
3978 new_port
->port_no
= port_no
;
3979 cmap_insert(&dp
->ports
, &new_port
->node
, hash_port_no(port_no
));
3981 seq_change(dp
->port_seq
);
3982 unixctl_command_reply(conn
, NULL
);
3985 ovs_mutex_unlock(&dp
->port_mutex
);
3986 dp_netdev_unref(dp
);
3990 dpif_dummy_register__(const char *type
)
3992 struct dpif_class
*class;
3994 class = xmalloc(sizeof *class);
3995 *class = dpif_netdev_class
;
3996 class->type
= xstrdup(type
);
3997 dp_register_provider(class);
4001 dpif_dummy_override(const char *type
)
4006 * Ignore EAFNOSUPPORT to allow --enable-dummy=system with
4007 * a userland-only build. It's useful for testsuite.
4009 error
= dp_unregister_provider(type
);
4010 if (error
== 0 || error
== EAFNOSUPPORT
) {
4011 dpif_dummy_register__(type
);
4016 dpif_dummy_register(enum dummy_level level
)
4018 if (level
== DUMMY_OVERRIDE_ALL
) {
4023 dp_enumerate_types(&types
);
4024 SSET_FOR_EACH (type
, &types
) {
4025 dpif_dummy_override(type
);
4027 sset_destroy(&types
);
4028 } else if (level
== DUMMY_OVERRIDE_SYSTEM
) {
4029 dpif_dummy_override("system");
4032 dpif_dummy_register__("dummy");
4034 unixctl_command_register("dpif-dummy/change-port-number",
4035 "dp port new-number",
4036 3, 3, dpif_dummy_change_port_number
, NULL
);
4039 /* Datapath Classifier. */
4041 /* A set of rules that all have the same fields wildcarded. */
4042 struct dpcls_subtable
{
4043 /* The fields are only used by writers. */
4044 struct cmap_node cmap_node OVS_GUARDED
; /* Within dpcls 'subtables_map'. */
4046 /* These fields are accessed by readers. */
4047 struct cmap rules
; /* Contains "struct dpcls_rule"s. */
4048 struct netdev_flow_key mask
; /* Wildcards for fields (const). */
4049 /* 'mask' must be the last field, additional space is allocated here. */
4052 /* Initializes 'cls' as a classifier that initially contains no classification
4055 dpcls_init(struct dpcls
*cls
)
4057 cmap_init(&cls
->subtables_map
);
4058 pvector_init(&cls
->subtables
);
4062 dpcls_destroy_subtable(struct dpcls
*cls
, struct dpcls_subtable
*subtable
)
4064 pvector_remove(&cls
->subtables
, subtable
);
4065 cmap_remove(&cls
->subtables_map
, &subtable
->cmap_node
,
4066 subtable
->mask
.hash
);
4067 cmap_destroy(&subtable
->rules
);
4068 ovsrcu_postpone(free
, subtable
);
4071 /* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
4072 * caller's responsibility.
4073 * May only be called after all the readers have been terminated. */
4075 dpcls_destroy(struct dpcls
*cls
)
4078 struct dpcls_subtable
*subtable
;
4080 CMAP_FOR_EACH (subtable
, cmap_node
, &cls
->subtables_map
) {
4081 ovs_assert(cmap_count(&subtable
->rules
) == 0);
4082 dpcls_destroy_subtable(cls
, subtable
);
4084 cmap_destroy(&cls
->subtables_map
);
4085 pvector_destroy(&cls
->subtables
);
4089 static struct dpcls_subtable
*
4090 dpcls_create_subtable(struct dpcls
*cls
, const struct netdev_flow_key
*mask
)
4092 struct dpcls_subtable
*subtable
;
4094 /* Need to add one. */
4095 subtable
= xmalloc(sizeof *subtable
4096 - sizeof subtable
->mask
.mf
+ mask
->len
);
4097 cmap_init(&subtable
->rules
);
4098 netdev_flow_key_clone(&subtable
->mask
, mask
);
4099 cmap_insert(&cls
->subtables_map
, &subtable
->cmap_node
, mask
->hash
);
4100 pvector_insert(&cls
->subtables
, subtable
, 0);
4101 pvector_publish(&cls
->subtables
);
4106 static inline struct dpcls_subtable
*
4107 dpcls_find_subtable(struct dpcls
*cls
, const struct netdev_flow_key
*mask
)
4109 struct dpcls_subtable
*subtable
;
4111 CMAP_FOR_EACH_WITH_HASH (subtable
, cmap_node
, mask
->hash
,
4112 &cls
->subtables_map
) {
4113 if (netdev_flow_key_equal(&subtable
->mask
, mask
)) {
4117 return dpcls_create_subtable(cls
, mask
);
4120 /* Insert 'rule' into 'cls'. */
4122 dpcls_insert(struct dpcls
*cls
, struct dpcls_rule
*rule
,
4123 const struct netdev_flow_key
*mask
)
4125 struct dpcls_subtable
*subtable
= dpcls_find_subtable(cls
, mask
);
4127 rule
->mask
= &subtable
->mask
;
4128 cmap_insert(&subtable
->rules
, &rule
->cmap_node
, rule
->flow
.hash
);
4131 /* Removes 'rule' from 'cls', also destructing the 'rule'. */
4133 dpcls_remove(struct dpcls
*cls
, struct dpcls_rule
*rule
)
4135 struct dpcls_subtable
*subtable
;
4137 ovs_assert(rule
->mask
);
4139 INIT_CONTAINER(subtable
, rule
->mask
, mask
);
4141 if (cmap_remove(&subtable
->rules
, &rule
->cmap_node
, rule
->flow
.hash
)
4143 dpcls_destroy_subtable(cls
, subtable
);
4144 pvector_publish(&cls
->subtables
);
4148 /* Returns true if 'target' satisfies 'key' in 'mask', that is, if each 1-bit
4149 * in 'mask' the values in 'key' and 'target' are the same. */
4151 dpcls_rule_matches_key(const struct dpcls_rule
*rule
,
4152 const struct netdev_flow_key
*target
)
4154 const uint64_t *keyp
= miniflow_get_values(&rule
->flow
.mf
);
4155 const uint64_t *maskp
= miniflow_get_values(&rule
->mask
->mf
);
4158 NETDEV_FLOW_KEY_FOR_EACH_IN_FLOWMAP(value
, target
, rule
->flow
.mf
.map
) {
4159 if (OVS_UNLIKELY((value
& *maskp
++) != *keyp
++)) {
4166 /* For each miniflow in 'flows' performs a classifier lookup writing the result
4167 * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
4168 * NULL it is skipped.
4170 * This function is optimized for use in the userspace datapath and therefore
4171 * does not implement a lot of features available in the standard
4172 * classifier_lookup() function. Specifically, it does not implement
4173 * priorities, instead returning any rule which matches the flow.
4175 * Returns true if all flows found a corresponding rule. */
4177 dpcls_lookup(const struct dpcls
*cls
, const struct netdev_flow_key keys
[],
4178 struct dpcls_rule
**rules
, const size_t cnt
)
4180 /* The batch size 16 was experimentally found faster than 8 or 32. */
4181 typedef uint16_t map_type
;
4182 #define MAP_BITS (sizeof(map_type) * CHAR_BIT)
4184 #if !defined(__CHECKER__) && !defined(_WIN32)
4185 const int N_MAPS
= DIV_ROUND_UP(cnt
, MAP_BITS
);
4187 enum { N_MAPS
= DIV_ROUND_UP(NETDEV_MAX_BURST
, MAP_BITS
) };
4189 map_type maps
[N_MAPS
];
4190 struct dpcls_subtable
*subtable
;
4192 memset(maps
, 0xff, sizeof maps
);
4193 if (cnt
% MAP_BITS
) {
4194 maps
[N_MAPS
- 1] >>= MAP_BITS
- cnt
% MAP_BITS
; /* Clear extra bits. */
4196 memset(rules
, 0, cnt
* sizeof *rules
);
4198 PVECTOR_FOR_EACH (subtable
, &cls
->subtables
) {
4199 const struct netdev_flow_key
*mkeys
= keys
;
4200 struct dpcls_rule
**mrules
= rules
;
4201 map_type remains
= 0;
4204 BUILD_ASSERT_DECL(sizeof remains
== sizeof *maps
);
4206 for (m
= 0; m
< N_MAPS
; m
++, mkeys
+= MAP_BITS
, mrules
+= MAP_BITS
) {
4207 uint32_t hashes
[MAP_BITS
];
4208 const struct cmap_node
*nodes
[MAP_BITS
];
4209 unsigned long map
= maps
[m
];
4213 continue; /* Skip empty maps. */
4216 /* Compute hashes for the remaining keys. */
4217 ULLONG_FOR_EACH_1(i
, map
) {
4218 hashes
[i
] = netdev_flow_key_hash_in_mask(&mkeys
[i
],
4222 map
= cmap_find_batch(&subtable
->rules
, map
, hashes
, nodes
);
4223 /* Check results. */
4224 ULLONG_FOR_EACH_1(i
, map
) {
4225 struct dpcls_rule
*rule
;
4227 CMAP_NODE_FOR_EACH (rule
, cmap_node
, nodes
[i
]) {
4228 if (OVS_LIKELY(dpcls_rule_matches_key(rule
, &mkeys
[i
]))) {
4233 ULLONG_SET0(map
, i
); /* Did not match. */
4235 ; /* Keep Sparse happy. */
4237 maps
[m
] &= ~map
; /* Clear the found rules. */
4241 return true; /* All found. */
4244 return false; /* Some misses. */