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73e141f9 | 1 | /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. |
e1ec7dd4 EJ |
2 | * |
3 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | * you may not use this file except in compliance with the License. | |
5 | * You may obtain a copy of the License at: | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
9 | * Unless required by applicable law or agreed to in writing, software | |
10 | * distributed under the License is distributed on an "AS IS" BASIS, | |
11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | * See the License for the specific language governing permissions and | |
13 | * limitations under the License. */ | |
14 | ||
15 | #include <config.h> | |
16 | #include "ofproto-dpif-upcall.h" | |
17 | ||
18 | #include <errno.h> | |
19 | #include <stdbool.h> | |
20 | #include <inttypes.h> | |
21 | ||
0fb7792a | 22 | #include "connmgr.h" |
e1ec7dd4 | 23 | #include "coverage.h" |
9fce0584 | 24 | #include "cmap.h" |
e1ec7dd4 | 25 | #include "dpif.h" |
e22d52ee | 26 | #include "dynamic-string.h" |
e1ec7dd4 | 27 | #include "fail-open.h" |
05067881 | 28 | #include "guarded-list.h" |
e1ec7dd4 | 29 | #include "latch.h" |
e1ec7dd4 EJ |
30 | #include "list.h" |
31 | #include "netlink.h" | |
32 | #include "ofpbuf.h" | |
10e57640 EJ |
33 | #include "ofproto-dpif-ipfix.h" |
34 | #include "ofproto-dpif-sflow.h" | |
e79a6c83 | 35 | #include "ofproto-dpif-xlate.h" |
0f2ea848 | 36 | #include "ovs-rcu.h" |
e1ec7dd4 EJ |
37 | #include "packets.h" |
38 | #include "poll-loop.h" | |
e22d52ee EJ |
39 | #include "seq.h" |
40 | #include "unixctl.h" | |
e6211adc | 41 | #include "openvswitch/vlog.h" |
e1ec7dd4 EJ |
42 | |
43 | #define MAX_QUEUE_LENGTH 512 | |
6b31e073 | 44 | #define UPCALL_MAX_BATCH 64 |
e79a6c83 | 45 | #define REVALIDATE_MAX_BATCH 50 |
e1ec7dd4 EJ |
46 | |
47 | VLOG_DEFINE_THIS_MODULE(ofproto_dpif_upcall); | |
48 | ||
ec47af51 JS |
49 | COVERAGE_DEFINE(dumped_duplicate_flow); |
50 | COVERAGE_DEFINE(dumped_new_flow); | |
23597df0 JS |
51 | COVERAGE_DEFINE(handler_duplicate_upcall); |
52 | COVERAGE_DEFINE(upcall_ukey_contention); | |
3b62a9d3 | 53 | COVERAGE_DEFINE(revalidate_missed_dp_flow); |
73a3c475 | 54 | |
9a159f74 AW |
55 | /* A thread that reads upcalls from dpif, forwards each upcall's packet, |
56 | * and possibly sets up a kernel flow as a cache. */ | |
e1ec7dd4 EJ |
57 | struct handler { |
58 | struct udpif *udpif; /* Parent udpif. */ | |
59 | pthread_t thread; /* Thread ID. */ | |
9a159f74 | 60 | uint32_t handler_id; /* Handler id. */ |
e1ec7dd4 EJ |
61 | }; |
62 | ||
b8d3daeb JS |
63 | /* In the absence of a multiple-writer multiple-reader datastructure for |
64 | * storing ukeys, we use a large number of cmaps, each with its own lock for | |
65 | * writing. */ | |
66 | #define N_UMAPS 512 /* per udpif. */ | |
67 | struct umap { | |
68 | struct ovs_mutex mutex; /* Take for writing to the following. */ | |
69 | struct cmap cmap; /* Datapath flow keys. */ | |
70 | }; | |
71 | ||
7d170098 EJ |
72 | /* A thread that processes datapath flows, updates OpenFlow statistics, and |
73 | * updates or removes them if necessary. */ | |
e79a6c83 EJ |
74 | struct revalidator { |
75 | struct udpif *udpif; /* Parent udpif. */ | |
e79a6c83 | 76 | pthread_t thread; /* Thread ID. */ |
8ba0a522 | 77 | unsigned int id; /* ovsthread_id_self(). */ |
e79a6c83 EJ |
78 | }; |
79 | ||
e1ec7dd4 EJ |
80 | /* An upcall handler for ofproto_dpif. |
81 | * | |
9a159f74 AW |
82 | * udpif keeps records of two kind of logically separate units: |
83 | * | |
84 | * upcall handling | |
85 | * --------------- | |
86 | * | |
87 | * - An array of 'struct handler's for upcall handling and flow | |
88 | * installation. | |
e79a6c83 | 89 | * |
9a159f74 AW |
90 | * flow revalidation |
91 | * ----------------- | |
92 | * | |
7d170098 EJ |
93 | * - Revalidation threads which read the datapath flow table and maintains |
94 | * them. | |
95 | */ | |
e1ec7dd4 | 96 | struct udpif { |
ca6ba700 | 97 | struct ovs_list list_node; /* In all_udpifs list. */ |
e22d52ee | 98 | |
e1ec7dd4 EJ |
99 | struct dpif *dpif; /* Datapath handle. */ |
100 | struct dpif_backer *backer; /* Opaque dpif_backer pointer. */ | |
101 | ||
10e57640 | 102 | struct handler *handlers; /* Upcall handlers. */ |
e1ec7dd4 EJ |
103 | size_t n_handlers; |
104 | ||
e79a6c83 EJ |
105 | struct revalidator *revalidators; /* Flow revalidators. */ |
106 | size_t n_revalidators; | |
107 | ||
e79a6c83 EJ |
108 | struct latch exit_latch; /* Tells child threads to exit. */ |
109 | ||
7d170098 EJ |
110 | /* Revalidation. */ |
111 | struct seq *reval_seq; /* Incremented to force revalidation. */ | |
7d170098 | 112 | bool reval_exit; /* Set by leader on 'exit_latch. */ |
d8043da7 | 113 | struct ovs_barrier reval_barrier; /* Barrier used by revalidators. */ |
ac64794a | 114 | struct dpif_flow_dump *dump; /* DPIF flow dump state. */ |
e79a6c83 | 115 | long long int dump_duration; /* Duration of the last flow dump. */ |
7d170098 | 116 | struct seq *dump_seq; /* Increments each dump iteration. */ |
64bb477f | 117 | atomic_bool enable_ufid; /* If true, skip dumping flow attrs. */ |
7d170098 | 118 | |
b8d3daeb | 119 | /* There are 'N_UMAPS' maps containing 'struct udpif_key' elements. |
7d170098 EJ |
120 | * |
121 | * During the flow dump phase, revalidators insert into these with a random | |
122 | * distribution. During the garbage collection phase, each revalidator | |
b8d3daeb JS |
123 | * takes care of garbage collecting a slice of these maps. */ |
124 | struct umap *ukeys; | |
e1ec7dd4 | 125 | |
e79a6c83 EJ |
126 | /* Datapath flow statistics. */ |
127 | unsigned int max_n_flows; | |
128 | unsigned int avg_n_flows; | |
e1ec7dd4 | 129 | |
e79a6c83 | 130 | /* Following fields are accessed and modified by different threads. */ |
e79a6c83 | 131 | atomic_uint flow_limit; /* Datapath flow hard limit. */ |
64ca9472 JS |
132 | |
133 | /* n_flows_mutex prevents multiple threads updating these concurrently. */ | |
b482e960 | 134 | atomic_uint n_flows; /* Number of flows in the datapath. */ |
64ca9472 JS |
135 | atomic_llong n_flows_timestamp; /* Last time n_flows was updated. */ |
136 | struct ovs_mutex n_flows_mutex; | |
27f57736 JS |
137 | |
138 | /* Following fields are accessed and modified only from the main thread. */ | |
139 | struct unixctl_conn **conns; /* Connections waiting on dump_seq. */ | |
140 | uint64_t conn_seq; /* Corresponds to 'dump_seq' when | |
141 | conns[n_conns-1] was stored. */ | |
142 | size_t n_conns; /* Number of connections waiting. */ | |
e1ec7dd4 EJ |
143 | }; |
144 | ||
10e57640 EJ |
145 | enum upcall_type { |
146 | BAD_UPCALL, /* Some kind of bug somewhere. */ | |
147 | MISS_UPCALL, /* A flow miss. */ | |
148 | SFLOW_UPCALL, /* sFlow sample. */ | |
149 | FLOW_SAMPLE_UPCALL, /* Per-flow sampling. */ | |
150 | IPFIX_UPCALL /* Per-bridge sampling. */ | |
151 | }; | |
152 | ||
153 | struct upcall { | |
cc377352 | 154 | struct ofproto_dpif *ofproto; /* Parent ofproto. */ |
e672ff9b JR |
155 | const struct recirc_id_node *recirc; /* Recirculation context. */ |
156 | bool have_recirc_ref; /* Reference held on recirc ctx? */ | |
a0bab870 | 157 | |
cc377352 EJ |
158 | /* The flow and packet are only required to be constant when using |
159 | * dpif-netdev. If a modification is absolutely necessary, a const cast | |
160 | * may be used with other datapaths. */ | |
161 | const struct flow *flow; /* Parsed representation of the packet. */ | |
7af12bd7 | 162 | const ovs_u128 *ufid; /* Unique identifier for 'flow'. */ |
bd5131ba | 163 | unsigned pmd_id; /* Datapath poll mode driver id. */ |
cf62fa4c | 164 | const struct dp_packet *packet; /* Packet associated with this upcall. */ |
cc377352 | 165 | ofp_port_t in_port; /* OpenFlow in port, or OFPP_NONE. */ |
a0bab870 | 166 | |
cc377352 EJ |
167 | enum dpif_upcall_type type; /* Datapath type of the upcall. */ |
168 | const struct nlattr *userdata; /* Userdata for DPIF_UC_ACTION Upcalls. */ | |
7321bda3 | 169 | const struct nlattr *actions; /* Flow actions in DPIF_UC_ACTION Upcalls. */ |
cc377352 EJ |
170 | |
171 | bool xout_initialized; /* True if 'xout' must be uninitialized. */ | |
172 | struct xlate_out xout; /* Result of xlate_actions(). */ | |
2338727d | 173 | struct ofpbuf put_actions; /* Actions 'put' in the fastpath. */ |
cc377352 | 174 | |
dcc2c6cd JR |
175 | struct dpif_ipfix *ipfix; /* IPFIX pointer or NULL. */ |
176 | struct dpif_sflow *sflow; /* SFlow pointer or NULL. */ | |
a0bab870 | 177 | |
cc377352 EJ |
178 | bool vsp_adjusted; /* 'packet' and 'flow' were adjusted for |
179 | VLAN splinters if true. */ | |
10e57640 | 180 | |
23597df0 JS |
181 | struct udpif_key *ukey; /* Revalidator flow cache. */ |
182 | bool ukey_persists; /* Set true to keep 'ukey' beyond the | |
183 | lifetime of this upcall. */ | |
184 | ||
185 | uint64_t dump_seq; /* udpif->dump_seq at translation time. */ | |
186 | uint64_t reval_seq; /* udpif->reval_seq at translation time. */ | |
187 | ||
cc377352 EJ |
188 | /* Not used by the upcall callback interface. */ |
189 | const struct nlattr *key; /* Datapath flow key. */ | |
190 | size_t key_len; /* Datapath flow key length. */ | |
8b7ea2d4 | 191 | const struct nlattr *out_tun_key; /* Datapath output tunnel key. */ |
10e57640 EJ |
192 | }; |
193 | ||
e79a6c83 EJ |
194 | /* 'udpif_key's are responsible for tracking the little bit of state udpif |
195 | * needs to do flow expiration which can't be pulled directly from the | |
23597df0 JS |
196 | * datapath. They may be created by any handler or revalidator thread at any |
197 | * time, and read by any revalidator during the dump phase. They are however | |
198 | * each owned by a single revalidator which takes care of destroying them | |
199 | * during the garbage-collection phase. | |
7d170098 | 200 | * |
b8d3daeb JS |
201 | * The mutex within the ukey protects some members of the ukey. The ukey |
202 | * itself is protected by RCU and is held within a umap in the parent udpif. | |
203 | * Adding or removing a ukey from a umap is only safe when holding the | |
204 | * corresponding umap lock. */ | |
e79a6c83 | 205 | struct udpif_key { |
9fce0584 | 206 | struct cmap_node cmap_node; /* In parent revalidator 'ukeys' map. */ |
e79a6c83 | 207 | |
7d170098 EJ |
208 | /* These elements are read only once created, and therefore aren't |
209 | * protected by a mutex. */ | |
210 | const struct nlattr *key; /* Datapath flow key. */ | |
e79a6c83 | 211 | size_t key_len; /* Length of 'key'. */ |
bc2df54d JS |
212 | const struct nlattr *mask; /* Datapath flow mask. */ |
213 | size_t mask_len; /* Length of 'mask'. */ | |
214 | struct ofpbuf *actions; /* Datapath flow actions as nlattrs. */ | |
7af12bd7 | 215 | ovs_u128 ufid; /* Unique flow identifier. */ |
70e5ed6f | 216 | bool ufid_present; /* True if 'ufid' is in datapath. */ |
9fce0584 | 217 | uint32_t hash; /* Pre-computed hash for 'key'. */ |
bd5131ba | 218 | unsigned pmd_id; /* Datapath poll mode driver id. */ |
e79a6c83 | 219 | |
7d170098 EJ |
220 | struct ovs_mutex mutex; /* Guards the following. */ |
221 | struct dpif_flow_stats stats OVS_GUARDED; /* Last known stats.*/ | |
222 | long long int created OVS_GUARDED; /* Estimate of creation time. */ | |
efa08531 | 223 | uint64_t dump_seq OVS_GUARDED; /* Tracks udpif->dump_seq. */ |
23597df0 | 224 | uint64_t reval_seq OVS_GUARDED; /* Tracks udpif->reval_seq. */ |
7d170098 EJ |
225 | bool flow_exists OVS_GUARDED; /* Ensures flows are only deleted |
226 | once. */ | |
227 | ||
228 | struct xlate_cache *xcache OVS_GUARDED; /* Cache for xlate entries that | |
229 | * are affected by this ukey. | |
230 | * Used for stats and learning.*/ | |
02334943 | 231 | union { |
bc2df54d JS |
232 | struct odputil_keybuf buf; |
233 | struct nlattr nla; | |
234 | } keybuf, maskbuf; | |
e672ff9b JR |
235 | |
236 | /* Recirculation IDs with references held by the ukey. */ | |
237 | unsigned n_recircs; | |
238 | uint32_t recircs[]; /* 'n_recircs' id's for which references are held. */ | |
e79a6c83 EJ |
239 | }; |
240 | ||
6dad4d44 JS |
241 | /* Datapath operation with optional ukey attached. */ |
242 | struct ukey_op { | |
243 | struct udpif_key *ukey; | |
244 | struct dpif_flow_stats stats; /* Stats for 'op'. */ | |
245 | struct dpif_op dop; /* Flow operation. */ | |
246 | }; | |
247 | ||
e1ec7dd4 | 248 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); |
55951e15 | 249 | static struct ovs_list all_udpifs = OVS_LIST_INITIALIZER(&all_udpifs); |
e1ec7dd4 | 250 | |
cc377352 EJ |
251 | static size_t recv_upcalls(struct handler *); |
252 | static int process_upcall(struct udpif *, struct upcall *, | |
253 | struct ofpbuf *odp_actions); | |
6b31e073 | 254 | static void handle_upcalls(struct udpif *, struct upcall *, size_t n_upcalls); |
1f867548 AW |
255 | static void udpif_stop_threads(struct udpif *); |
256 | static void udpif_start_threads(struct udpif *, size_t n_handlers, | |
257 | size_t n_revalidators); | |
10e57640 | 258 | static void *udpif_upcall_handler(void *); |
e79a6c83 | 259 | static void *udpif_revalidator(void *); |
0e2a9f6f | 260 | static unsigned long udpif_get_n_flows(struct udpif *); |
7d170098 | 261 | static void revalidate(struct revalidator *); |
e79a6c83 | 262 | static void revalidator_sweep(struct revalidator *); |
e96a5c24 | 263 | static void revalidator_purge(struct revalidator *); |
e22d52ee EJ |
264 | static void upcall_unixctl_show(struct unixctl_conn *conn, int argc, |
265 | const char *argv[], void *aux); | |
e79a6c83 EJ |
266 | static void upcall_unixctl_disable_megaflows(struct unixctl_conn *, int argc, |
267 | const char *argv[], void *aux); | |
268 | static void upcall_unixctl_enable_megaflows(struct unixctl_conn *, int argc, | |
269 | const char *argv[], void *aux); | |
64bb477f JS |
270 | static void upcall_unixctl_disable_ufid(struct unixctl_conn *, int argc, |
271 | const char *argv[], void *aux); | |
272 | static void upcall_unixctl_enable_ufid(struct unixctl_conn *, int argc, | |
273 | const char *argv[], void *aux); | |
94b8c324 JS |
274 | static void upcall_unixctl_set_flow_limit(struct unixctl_conn *conn, int argc, |
275 | const char *argv[], void *aux); | |
27f57736 JS |
276 | static void upcall_unixctl_dump_wait(struct unixctl_conn *conn, int argc, |
277 | const char *argv[], void *aux); | |
98bb4286 JS |
278 | static void upcall_unixctl_purge(struct unixctl_conn *conn, int argc, |
279 | const char *argv[], void *aux); | |
7d170098 | 280 | |
e672ff9b | 281 | static struct udpif_key *ukey_create_from_upcall(struct upcall *); |
64bb477f JS |
282 | static int ukey_create_from_dpif_flow(const struct udpif *, |
283 | const struct dpif_flow *, | |
284 | struct udpif_key **); | |
23597df0 JS |
285 | static bool ukey_install_start(struct udpif *, struct udpif_key *ukey); |
286 | static bool ukey_install_finish(struct udpif_key *ukey, int error); | |
287 | static bool ukey_install(struct udpif *udpif, struct udpif_key *ukey); | |
7af12bd7 JS |
288 | static struct udpif_key *ukey_lookup(struct udpif *udpif, |
289 | const ovs_u128 *ufid); | |
23597df0 | 290 | static int ukey_acquire(struct udpif *, const struct dpif_flow *, |
64bb477f | 291 | struct udpif_key **result, int *error); |
9fce0584 | 292 | static void ukey_delete__(struct udpif_key *); |
b8d3daeb | 293 | static void ukey_delete(struct umap *, struct udpif_key *); |
cc377352 EJ |
294 | static enum upcall_type classify_upcall(enum dpif_upcall_type type, |
295 | const struct nlattr *userdata); | |
296 | ||
cc377352 | 297 | static int upcall_receive(struct upcall *, const struct dpif_backer *, |
cf62fa4c | 298 | const struct dp_packet *packet, enum dpif_upcall_type, |
7af12bd7 | 299 | const struct nlattr *userdata, const struct flow *, |
bd5131ba | 300 | const ovs_u128 *ufid, const unsigned pmd_id); |
cc377352 | 301 | static void upcall_uninit(struct upcall *); |
e79a6c83 | 302 | |
623540e4 EJ |
303 | static upcall_callback upcall_cb; |
304 | ||
e79a6c83 | 305 | static atomic_bool enable_megaflows = ATOMIC_VAR_INIT(true); |
70f07728 | 306 | static atomic_bool enable_ufid = ATOMIC_VAR_INIT(true); |
e1ec7dd4 | 307 | |
0fc1f5c0 HH |
308 | void |
309 | udpif_init(void) | |
e1ec7dd4 | 310 | { |
e22d52ee | 311 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; |
e22d52ee EJ |
312 | if (ovsthread_once_start(&once)) { |
313 | unixctl_command_register("upcall/show", "", 0, 0, upcall_unixctl_show, | |
314 | NULL); | |
e79a6c83 EJ |
315 | unixctl_command_register("upcall/disable-megaflows", "", 0, 0, |
316 | upcall_unixctl_disable_megaflows, NULL); | |
317 | unixctl_command_register("upcall/enable-megaflows", "", 0, 0, | |
318 | upcall_unixctl_enable_megaflows, NULL); | |
64bb477f JS |
319 | unixctl_command_register("upcall/disable-ufid", "", 0, 0, |
320 | upcall_unixctl_disable_ufid, NULL); | |
321 | unixctl_command_register("upcall/enable-ufid", "", 0, 0, | |
322 | upcall_unixctl_enable_ufid, NULL); | |
94b8c324 JS |
323 | unixctl_command_register("upcall/set-flow-limit", "", 1, 1, |
324 | upcall_unixctl_set_flow_limit, NULL); | |
27f57736 JS |
325 | unixctl_command_register("revalidator/wait", "", 0, 0, |
326 | upcall_unixctl_dump_wait, NULL); | |
98bb4286 JS |
327 | unixctl_command_register("revalidator/purge", "", 0, 0, |
328 | upcall_unixctl_purge, NULL); | |
e22d52ee EJ |
329 | ovsthread_once_done(&once); |
330 | } | |
0fc1f5c0 HH |
331 | } |
332 | ||
333 | struct udpif * | |
334 | udpif_create(struct dpif_backer *backer, struct dpif *dpif) | |
335 | { | |
336 | struct udpif *udpif = xzalloc(sizeof *udpif); | |
e22d52ee | 337 | |
e1ec7dd4 EJ |
338 | udpif->dpif = dpif; |
339 | udpif->backer = backer; | |
e79a6c83 | 340 | atomic_init(&udpif->flow_limit, MIN(ofproto_flow_limit, 10000)); |
d7285d74 | 341 | udpif->reval_seq = seq_create(); |
e79a6c83 | 342 | udpif->dump_seq = seq_create(); |
e1ec7dd4 | 343 | latch_init(&udpif->exit_latch); |
e22d52ee | 344 | list_push_back(&all_udpifs, &udpif->list_node); |
64bb477f | 345 | atomic_init(&udpif->enable_ufid, false); |
64ca9472 JS |
346 | atomic_init(&udpif->n_flows, 0); |
347 | atomic_init(&udpif->n_flows_timestamp, LLONG_MIN); | |
348 | ovs_mutex_init(&udpif->n_flows_mutex); | |
b8d3daeb JS |
349 | udpif->ukeys = xmalloc(N_UMAPS * sizeof *udpif->ukeys); |
350 | for (int i = 0; i < N_UMAPS; i++) { | |
351 | cmap_init(&udpif->ukeys[i].cmap); | |
352 | ovs_mutex_init(&udpif->ukeys[i].mutex); | |
353 | } | |
e1ec7dd4 | 354 | |
623540e4 | 355 | dpif_register_upcall_cb(dpif, upcall_cb, udpif); |
6b31e073 | 356 | |
e1ec7dd4 EJ |
357 | return udpif; |
358 | } | |
359 | ||
27f57736 JS |
360 | void |
361 | udpif_run(struct udpif *udpif) | |
362 | { | |
363 | if (udpif->conns && udpif->conn_seq != seq_read(udpif->dump_seq)) { | |
364 | int i; | |
365 | ||
366 | for (i = 0; i < udpif->n_conns; i++) { | |
367 | unixctl_command_reply(udpif->conns[i], NULL); | |
368 | } | |
369 | free(udpif->conns); | |
370 | udpif->conns = NULL; | |
371 | udpif->n_conns = 0; | |
372 | } | |
373 | } | |
374 | ||
e1ec7dd4 EJ |
375 | void |
376 | udpif_destroy(struct udpif *udpif) | |
377 | { | |
1f867548 | 378 | udpif_stop_threads(udpif); |
e1ec7dd4 | 379 | |
b8d3daeb JS |
380 | for (int i = 0; i < N_UMAPS; i++) { |
381 | cmap_destroy(&udpif->ukeys[i].cmap); | |
382 | ovs_mutex_destroy(&udpif->ukeys[i].mutex); | |
383 | } | |
384 | free(udpif->ukeys); | |
385 | udpif->ukeys = NULL; | |
386 | ||
e22d52ee | 387 | list_remove(&udpif->list_node); |
e1ec7dd4 | 388 | latch_destroy(&udpif->exit_latch); |
d7285d74 | 389 | seq_destroy(udpif->reval_seq); |
e79a6c83 | 390 | seq_destroy(udpif->dump_seq); |
64ca9472 | 391 | ovs_mutex_destroy(&udpif->n_flows_mutex); |
e1ec7dd4 EJ |
392 | free(udpif); |
393 | } | |
394 | ||
1f867548 AW |
395 | /* Stops the handler and revalidator threads, must be enclosed in |
396 | * ovsrcu quiescent state unless when destroying udpif. */ | |
397 | static void | |
398 | udpif_stop_threads(struct udpif *udpif) | |
e1ec7dd4 | 399 | { |
3aadc5bb | 400 | if (udpif && (udpif->n_handlers != 0 || udpif->n_revalidators != 0)) { |
e1ec7dd4 EJ |
401 | size_t i; |
402 | ||
403 | latch_set(&udpif->exit_latch); | |
404 | ||
e1ec7dd4 EJ |
405 | for (i = 0; i < udpif->n_handlers; i++) { |
406 | struct handler *handler = &udpif->handlers[i]; | |
407 | ||
e79a6c83 EJ |
408 | xpthread_join(handler->thread, NULL); |
409 | } | |
410 | ||
411 | for (i = 0; i < udpif->n_revalidators; i++) { | |
7d170098 | 412 | xpthread_join(udpif->revalidators[i].thread, NULL); |
e1ec7dd4 EJ |
413 | } |
414 | ||
6b31e073 RW |
415 | dpif_disable_upcall(udpif->dpif); |
416 | ||
e79a6c83 EJ |
417 | for (i = 0; i < udpif->n_revalidators; i++) { |
418 | struct revalidator *revalidator = &udpif->revalidators[i]; | |
e79a6c83 | 419 | |
e96a5c24 JS |
420 | /* Delete ukeys, and delete all flows from the datapath to prevent |
421 | * double-counting stats. */ | |
422 | revalidator_purge(revalidator); | |
e79a6c83 EJ |
423 | } |
424 | ||
e1ec7dd4 EJ |
425 | latch_poll(&udpif->exit_latch); |
426 | ||
d8043da7 | 427 | ovs_barrier_destroy(&udpif->reval_barrier); |
7d170098 | 428 | |
e79a6c83 EJ |
429 | free(udpif->revalidators); |
430 | udpif->revalidators = NULL; | |
431 | udpif->n_revalidators = 0; | |
432 | ||
e1ec7dd4 EJ |
433 | free(udpif->handlers); |
434 | udpif->handlers = NULL; | |
435 | udpif->n_handlers = 0; | |
436 | } | |
1f867548 | 437 | } |
e1ec7dd4 | 438 | |
1f867548 AW |
439 | /* Starts the handler and revalidator threads, must be enclosed in |
440 | * ovsrcu quiescent state. */ | |
441 | static void | |
442 | udpif_start_threads(struct udpif *udpif, size_t n_handlers, | |
443 | size_t n_revalidators) | |
444 | { | |
6f12bda3 | 445 | if (udpif && n_handlers && n_revalidators) { |
e1ec7dd4 | 446 | size_t i; |
8e1ffd75 | 447 | bool enable_ufid; |
e1ec7dd4 EJ |
448 | |
449 | udpif->n_handlers = n_handlers; | |
e79a6c83 EJ |
450 | udpif->n_revalidators = n_revalidators; |
451 | ||
e1ec7dd4 EJ |
452 | udpif->handlers = xzalloc(udpif->n_handlers * sizeof *udpif->handlers); |
453 | for (i = 0; i < udpif->n_handlers; i++) { | |
454 | struct handler *handler = &udpif->handlers[i]; | |
455 | ||
456 | handler->udpif = udpif; | |
9a159f74 | 457 | handler->handler_id = i; |
8ba0a522 BP |
458 | handler->thread = ovs_thread_create( |
459 | "handler", udpif_upcall_handler, handler); | |
e1ec7dd4 | 460 | } |
e1ec7dd4 | 461 | |
8e1ffd75 JS |
462 | enable_ufid = ofproto_dpif_get_enable_ufid(udpif->backer); |
463 | atomic_init(&udpif->enable_ufid, enable_ufid); | |
6b31e073 RW |
464 | dpif_enable_upcall(udpif->dpif); |
465 | ||
d8043da7 | 466 | ovs_barrier_init(&udpif->reval_barrier, udpif->n_revalidators); |
7d170098 | 467 | udpif->reval_exit = false; |
e79a6c83 EJ |
468 | udpif->revalidators = xzalloc(udpif->n_revalidators |
469 | * sizeof *udpif->revalidators); | |
470 | for (i = 0; i < udpif->n_revalidators; i++) { | |
471 | struct revalidator *revalidator = &udpif->revalidators[i]; | |
472 | ||
473 | revalidator->udpif = udpif; | |
8ba0a522 BP |
474 | revalidator->thread = ovs_thread_create( |
475 | "revalidator", udpif_revalidator, revalidator); | |
e79a6c83 | 476 | } |
e1ec7dd4 | 477 | } |
1f867548 | 478 | } |
0f2ea848 | 479 | |
1f867548 AW |
480 | /* Tells 'udpif' how many threads it should use to handle upcalls. |
481 | * 'n_handlers' and 'n_revalidators' can never be zero. 'udpif''s | |
482 | * datapath handle must have packet reception enabled before starting | |
483 | * threads. */ | |
484 | void | |
485 | udpif_set_threads(struct udpif *udpif, size_t n_handlers, | |
486 | size_t n_revalidators) | |
487 | { | |
3aadc5bb | 488 | ovs_assert(udpif); |
1f867548 AW |
489 | ovs_assert(n_handlers && n_revalidators); |
490 | ||
491 | ovsrcu_quiesce_start(); | |
3aadc5bb AW |
492 | if (udpif->n_handlers != n_handlers |
493 | || udpif->n_revalidators != n_revalidators) { | |
494 | udpif_stop_threads(udpif); | |
495 | } | |
1f867548 | 496 | |
3aadc5bb | 497 | if (!udpif->handlers && !udpif->revalidators) { |
380fffec AW |
498 | int error; |
499 | ||
500 | error = dpif_handlers_set(udpif->dpif, n_handlers); | |
501 | if (error) { | |
502 | VLOG_ERR("failed to configure handlers in dpif %s: %s", | |
503 | dpif_name(udpif->dpif), ovs_strerror(error)); | |
504 | return; | |
505 | } | |
506 | ||
3aadc5bb AW |
507 | udpif_start_threads(udpif, n_handlers, n_revalidators); |
508 | } | |
0f2ea848 | 509 | ovsrcu_quiesce_end(); |
e1ec7dd4 EJ |
510 | } |
511 | ||
3f142f59 BP |
512 | /* Waits for all ongoing upcall translations to complete. This ensures that |
513 | * there are no transient references to any removed ofprotos (or other | |
514 | * objects). In particular, this should be called after an ofproto is removed | |
515 | * (e.g. via xlate_remove_ofproto()) but before it is destroyed. */ | |
516 | void | |
517 | udpif_synchronize(struct udpif *udpif) | |
518 | { | |
519 | /* This is stronger than necessary. It would be sufficient to ensure | |
520 | * (somehow) that each handler and revalidator thread had passed through | |
521 | * its main loop once. */ | |
522 | size_t n_handlers = udpif->n_handlers; | |
523 | size_t n_revalidators = udpif->n_revalidators; | |
1f867548 AW |
524 | |
525 | ovsrcu_quiesce_start(); | |
526 | udpif_stop_threads(udpif); | |
527 | udpif_start_threads(udpif, n_handlers, n_revalidators); | |
528 | ovsrcu_quiesce_end(); | |
3f142f59 BP |
529 | } |
530 | ||
e1ec7dd4 EJ |
531 | /* Notifies 'udpif' that something changed which may render previous |
532 | * xlate_actions() results invalid. */ | |
533 | void | |
534 | udpif_revalidate(struct udpif *udpif) | |
535 | { | |
d7285d74 | 536 | seq_change(udpif->reval_seq); |
e79a6c83 | 537 | } |
05067881 | 538 | |
e79a6c83 EJ |
539 | /* Returns a seq which increments every time 'udpif' pulls stats from the |
540 | * datapath. Callers can use this to get a sense of when might be a good time | |
541 | * to do periodic work which relies on relatively up to date statistics. */ | |
542 | struct seq * | |
543 | udpif_dump_seq(struct udpif *udpif) | |
544 | { | |
545 | return udpif->dump_seq; | |
e1ec7dd4 EJ |
546 | } |
547 | ||
1c030aa5 EJ |
548 | void |
549 | udpif_get_memory_usage(struct udpif *udpif, struct simap *usage) | |
550 | { | |
551 | size_t i; | |
552 | ||
1c030aa5 | 553 | simap_increase(usage, "handlers", udpif->n_handlers); |
e79a6c83 EJ |
554 | |
555 | simap_increase(usage, "revalidators", udpif->n_revalidators); | |
b8d3daeb | 556 | for (i = 0; i < N_UMAPS; i++) { |
9fce0584 | 557 | simap_increase(usage, "udpif keys", cmap_count(&udpif->ukeys[i].cmap)); |
e79a6c83 | 558 | } |
1c030aa5 EJ |
559 | } |
560 | ||
1b5b5071 | 561 | /* Remove flows from a single datapath. */ |
e79a6c83 | 562 | void |
1b5b5071 AZ |
563 | udpif_flush(struct udpif *udpif) |
564 | { | |
565 | size_t n_handlers, n_revalidators; | |
566 | ||
567 | n_handlers = udpif->n_handlers; | |
568 | n_revalidators = udpif->n_revalidators; | |
569 | ||
1f867548 AW |
570 | ovsrcu_quiesce_start(); |
571 | ||
572 | udpif_stop_threads(udpif); | |
1b5b5071 | 573 | dpif_flow_flush(udpif->dpif); |
1f867548 AW |
574 | udpif_start_threads(udpif, n_handlers, n_revalidators); |
575 | ||
576 | ovsrcu_quiesce_end(); | |
1b5b5071 AZ |
577 | } |
578 | ||
579 | /* Removes all flows from all datapaths. */ | |
580 | static void | |
581 | udpif_flush_all_datapaths(void) | |
e79a6c83 EJ |
582 | { |
583 | struct udpif *udpif; | |
584 | ||
585 | LIST_FOR_EACH (udpif, list_node, &all_udpifs) { | |
1b5b5071 | 586 | udpif_flush(udpif); |
e79a6c83 EJ |
587 | } |
588 | } | |
1b5b5071 | 589 | |
70f07728 JS |
590 | static bool |
591 | udpif_use_ufid(struct udpif *udpif) | |
592 | { | |
593 | bool enable; | |
594 | ||
595 | atomic_read_relaxed(&enable_ufid, &enable); | |
596 | return enable && ofproto_dpif_get_enable_ufid(udpif->backer); | |
597 | } | |
598 | ||
e79a6c83 | 599 | \f |
0e2a9f6f | 600 | static unsigned long |
64ca9472 | 601 | udpif_get_n_flows(struct udpif *udpif) |
e1ec7dd4 | 602 | { |
64ca9472 | 603 | long long int time, now; |
0e2a9f6f | 604 | unsigned long flow_count; |
64ca9472 JS |
605 | |
606 | now = time_msec(); | |
b482e960 | 607 | atomic_read_relaxed(&udpif->n_flows_timestamp, &time); |
64ca9472 JS |
608 | if (time < now - 100 && !ovs_mutex_trylock(&udpif->n_flows_mutex)) { |
609 | struct dpif_dp_stats stats; | |
610 | ||
b482e960 | 611 | atomic_store_relaxed(&udpif->n_flows_timestamp, now); |
64ca9472 JS |
612 | dpif_get_dp_stats(udpif->dpif, &stats); |
613 | flow_count = stats.n_flows; | |
b482e960 | 614 | atomic_store_relaxed(&udpif->n_flows, flow_count); |
64ca9472 JS |
615 | ovs_mutex_unlock(&udpif->n_flows_mutex); |
616 | } else { | |
b482e960 | 617 | atomic_read_relaxed(&udpif->n_flows, &flow_count); |
64ca9472 JS |
618 | } |
619 | return flow_count; | |
e79a6c83 | 620 | } |
e1ec7dd4 | 621 | |
a0bab870 | 622 | /* The upcall handler thread tries to read a batch of UPCALL_MAX_BATCH |
9a159f74 AW |
623 | * upcalls from dpif, processes the batch and installs corresponding flows |
624 | * in dpif. */ | |
e1ec7dd4 | 625 | static void * |
10e57640 | 626 | udpif_upcall_handler(void *arg) |
e1ec7dd4 | 627 | { |
e1ec7dd4 | 628 | struct handler *handler = arg; |
9a159f74 | 629 | struct udpif *udpif = handler->udpif; |
e1ec7dd4 | 630 | |
61057e88 | 631 | while (!latch_is_set(&handler->udpif->exit_latch)) { |
23597df0 JS |
632 | if (recv_upcalls(handler)) { |
633 | poll_immediate_wake(); | |
634 | } else { | |
9a159f74 AW |
635 | dpif_recv_wait(udpif->dpif, handler->handler_id); |
636 | latch_wait(&udpif->exit_latch); | |
e1ec7dd4 | 637 | } |
23597df0 | 638 | poll_block(); |
e1ec7dd4 | 639 | } |
61057e88 BP |
640 | |
641 | return NULL; | |
e1ec7dd4 | 642 | } |
e79a6c83 | 643 | |
cc377352 EJ |
644 | static size_t |
645 | recv_upcalls(struct handler *handler) | |
646 | { | |
647 | struct udpif *udpif = handler->udpif; | |
648 | uint64_t recv_stubs[UPCALL_MAX_BATCH][512 / 8]; | |
649 | struct ofpbuf recv_bufs[UPCALL_MAX_BATCH]; | |
a6f4ad08 | 650 | struct dpif_upcall dupcalls[UPCALL_MAX_BATCH]; |
cc377352 | 651 | struct upcall upcalls[UPCALL_MAX_BATCH]; |
ff601a08 | 652 | struct flow flows[UPCALL_MAX_BATCH]; |
cc377352 EJ |
653 | size_t n_upcalls, i; |
654 | ||
655 | n_upcalls = 0; | |
656 | while (n_upcalls < UPCALL_MAX_BATCH) { | |
657 | struct ofpbuf *recv_buf = &recv_bufs[n_upcalls]; | |
a6f4ad08 | 658 | struct dpif_upcall *dupcall = &dupcalls[n_upcalls]; |
cc377352 | 659 | struct upcall *upcall = &upcalls[n_upcalls]; |
ff601a08 | 660 | struct flow *flow = &flows[n_upcalls]; |
cc377352 EJ |
661 | int error; |
662 | ||
7174c145 | 663 | ofpbuf_use_stub(recv_buf, recv_stubs[n_upcalls], |
cc377352 | 664 | sizeof recv_stubs[n_upcalls]); |
a6f4ad08 | 665 | if (dpif_recv(udpif->dpif, handler->handler_id, dupcall, recv_buf)) { |
cc377352 EJ |
666 | ofpbuf_uninit(recv_buf); |
667 | break; | |
668 | } | |
669 | ||
ff601a08 | 670 | if (odp_flow_key_to_flow(dupcall->key, dupcall->key_len, flow) |
cc377352 EJ |
671 | == ODP_FIT_ERROR) { |
672 | goto free_dupcall; | |
673 | } | |
674 | ||
a6f4ad08 | 675 | error = upcall_receive(upcall, udpif->backer, &dupcall->packet, |
7af12bd7 | 676 | dupcall->type, dupcall->userdata, flow, |
1c1e46ed | 677 | &dupcall->ufid, PMD_ID_NULL); |
cc377352 EJ |
678 | if (error) { |
679 | if (error == ENODEV) { | |
680 | /* Received packet on datapath port for which we couldn't | |
681 | * associate an ofproto. This can happen if a port is removed | |
682 | * while traffic is being received. Print a rate-limited | |
683 | * message in case it happens frequently. */ | |
a6f4ad08 | 684 | dpif_flow_put(udpif->dpif, DPIF_FP_CREATE, dupcall->key, |
70e5ed6f | 685 | dupcall->key_len, NULL, 0, NULL, 0, |
1c1e46ed | 686 | &dupcall->ufid, PMD_ID_NULL, NULL); |
cc377352 | 687 | VLOG_INFO_RL(&rl, "received packet on unassociated datapath " |
ff601a08 | 688 | "port %"PRIu32, flow->in_port.odp_port); |
cc377352 EJ |
689 | } |
690 | goto free_dupcall; | |
691 | } | |
692 | ||
a6f4ad08 AW |
693 | upcall->key = dupcall->key; |
694 | upcall->key_len = dupcall->key_len; | |
7af12bd7 | 695 | upcall->ufid = &dupcall->ufid; |
cc377352 | 696 | |
8b7ea2d4 | 697 | upcall->out_tun_key = dupcall->out_tun_key; |
0a1017cb | 698 | upcall->actions = dupcall->actions; |
8b7ea2d4 | 699 | |
ff601a08 | 700 | if (vsp_adjust_flow(upcall->ofproto, flow, &dupcall->packet)) { |
cc377352 EJ |
701 | upcall->vsp_adjusted = true; |
702 | } | |
703 | ||
cf62fa4c PS |
704 | pkt_metadata_from_flow(&dupcall->packet.md, flow); |
705 | flow_extract(&dupcall->packet, flow); | |
cc377352 EJ |
706 | |
707 | error = process_upcall(udpif, upcall, NULL); | |
708 | if (error) { | |
709 | goto cleanup; | |
710 | } | |
711 | ||
712 | n_upcalls++; | |
713 | continue; | |
714 | ||
715 | cleanup: | |
716 | upcall_uninit(upcall); | |
717 | free_dupcall: | |
cf62fa4c | 718 | dp_packet_uninit(&dupcall->packet); |
cc377352 EJ |
719 | ofpbuf_uninit(recv_buf); |
720 | } | |
721 | ||
722 | if (n_upcalls) { | |
723 | handle_upcalls(handler->udpif, upcalls, n_upcalls); | |
724 | for (i = 0; i < n_upcalls; i++) { | |
cf62fa4c | 725 | dp_packet_uninit(&dupcalls[i].packet); |
cc377352 EJ |
726 | ofpbuf_uninit(&recv_bufs[i]); |
727 | upcall_uninit(&upcalls[i]); | |
728 | } | |
729 | } | |
730 | ||
731 | return n_upcalls; | |
732 | } | |
733 | ||
e79a6c83 EJ |
734 | static void * |
735 | udpif_revalidator(void *arg) | |
e1ec7dd4 | 736 | { |
7d170098 | 737 | /* Used by all revalidators. */ |
e79a6c83 | 738 | struct revalidator *revalidator = arg; |
7d170098 EJ |
739 | struct udpif *udpif = revalidator->udpif; |
740 | bool leader = revalidator == &udpif->revalidators[0]; | |
741 | ||
742 | /* Used only by the leader. */ | |
743 | long long int start_time = 0; | |
744 | uint64_t last_reval_seq = 0; | |
7d170098 | 745 | size_t n_flows = 0; |
e1ec7dd4 | 746 | |
8ba0a522 | 747 | revalidator->id = ovsthread_id_self(); |
e79a6c83 | 748 | for (;;) { |
7d170098 EJ |
749 | if (leader) { |
750 | uint64_t reval_seq; | |
e79a6c83 | 751 | |
e672ff9b JR |
752 | recirc_run(); /* Recirculation cleanup. */ |
753 | ||
7d170098 | 754 | reval_seq = seq_read(udpif->reval_seq); |
7d170098 | 755 | last_reval_seq = reval_seq; |
e79a6c83 | 756 | |
7d170098 EJ |
757 | n_flows = udpif_get_n_flows(udpif); |
758 | udpif->max_n_flows = MAX(n_flows, udpif->max_n_flows); | |
759 | udpif->avg_n_flows = (udpif->avg_n_flows + n_flows) / 2; | |
760 | ||
761 | /* Only the leader checks the exit latch to prevent a race where | |
762 | * some threads think it's true and exit and others think it's | |
763 | * false and block indefinitely on the reval_barrier */ | |
764 | udpif->reval_exit = latch_is_set(&udpif->exit_latch); | |
765 | ||
766 | start_time = time_msec(); | |
767 | if (!udpif->reval_exit) { | |
64bb477f JS |
768 | bool terse_dump; |
769 | ||
70f07728 | 770 | terse_dump = udpif_use_ufid(udpif); |
64bb477f | 771 | udpif->dump = dpif_flow_dump_create(udpif->dpif, terse_dump); |
e79a6c83 EJ |
772 | } |
773 | } | |
774 | ||
7d170098 | 775 | /* Wait for the leader to start the flow dump. */ |
d8043da7 | 776 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
777 | if (udpif->reval_exit) { |
778 | break; | |
e79a6c83 | 779 | } |
7d170098 EJ |
780 | revalidate(revalidator); |
781 | ||
782 | /* Wait for all flows to have been dumped before we garbage collect. */ | |
d8043da7 | 783 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
784 | revalidator_sweep(revalidator); |
785 | ||
786 | /* Wait for all revalidators to finish garbage collection. */ | |
d8043da7 | 787 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
788 | |
789 | if (leader) { | |
b482e960 | 790 | unsigned int flow_limit; |
7d170098 EJ |
791 | long long int duration; |
792 | ||
b482e960 JR |
793 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); |
794 | ||
ac64794a | 795 | dpif_flow_dump_destroy(udpif->dump); |
7d170098 EJ |
796 | seq_change(udpif->dump_seq); |
797 | ||
798 | duration = MAX(time_msec() - start_time, 1); | |
7d170098 EJ |
799 | udpif->dump_duration = duration; |
800 | if (duration > 2000) { | |
801 | flow_limit /= duration / 1000; | |
802 | } else if (duration > 1300) { | |
803 | flow_limit = flow_limit * 3 / 4; | |
804 | } else if (duration < 1000 && n_flows > 2000 | |
805 | && flow_limit < n_flows * 1000 / duration) { | |
806 | flow_limit += 1000; | |
807 | } | |
808 | flow_limit = MIN(ofproto_flow_limit, MAX(flow_limit, 1000)); | |
b482e960 | 809 | atomic_store_relaxed(&udpif->flow_limit, flow_limit); |
e79a6c83 | 810 | |
7d170098 EJ |
811 | if (duration > 2000) { |
812 | VLOG_INFO("Spent an unreasonably long %lldms dumping flows", | |
813 | duration); | |
814 | } | |
e79a6c83 | 815 | |
7d170098 EJ |
816 | poll_timer_wait_until(start_time + MIN(ofproto_max_idle, 500)); |
817 | seq_wait(udpif->reval_seq, last_reval_seq); | |
818 | latch_wait(&udpif->exit_latch); | |
819 | poll_block(); | |
e79a6c83 EJ |
820 | } |
821 | } | |
822 | ||
823 | return NULL; | |
824 | } | |
825 | \f | |
e1ec7dd4 | 826 | static enum upcall_type |
cc377352 | 827 | classify_upcall(enum dpif_upcall_type type, const struct nlattr *userdata) |
e1ec7dd4 | 828 | { |
e1ec7dd4 EJ |
829 | union user_action_cookie cookie; |
830 | size_t userdata_len; | |
831 | ||
832 | /* First look at the upcall type. */ | |
cc377352 | 833 | switch (type) { |
e1ec7dd4 EJ |
834 | case DPIF_UC_ACTION: |
835 | break; | |
836 | ||
837 | case DPIF_UC_MISS: | |
838 | return MISS_UPCALL; | |
839 | ||
840 | case DPIF_N_UC_TYPES: | |
841 | default: | |
cc377352 | 842 | VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, type); |
e1ec7dd4 EJ |
843 | return BAD_UPCALL; |
844 | } | |
845 | ||
846 | /* "action" upcalls need a closer look. */ | |
cc377352 | 847 | if (!userdata) { |
e1ec7dd4 EJ |
848 | VLOG_WARN_RL(&rl, "action upcall missing cookie"); |
849 | return BAD_UPCALL; | |
850 | } | |
cc377352 | 851 | userdata_len = nl_attr_get_size(userdata); |
e1ec7dd4 EJ |
852 | if (userdata_len < sizeof cookie.type |
853 | || userdata_len > sizeof cookie) { | |
34582733 | 854 | VLOG_WARN_RL(&rl, "action upcall cookie has unexpected size %"PRIuSIZE, |
e1ec7dd4 EJ |
855 | userdata_len); |
856 | return BAD_UPCALL; | |
857 | } | |
858 | memset(&cookie, 0, sizeof cookie); | |
cc377352 | 859 | memcpy(&cookie, nl_attr_get(userdata), userdata_len); |
f5790bf6 | 860 | if (userdata_len == MAX(8, sizeof cookie.sflow) |
e1ec7dd4 EJ |
861 | && cookie.type == USER_ACTION_COOKIE_SFLOW) { |
862 | return SFLOW_UPCALL; | |
f5790bf6 | 863 | } else if (userdata_len == MAX(8, sizeof cookie.slow_path) |
e1ec7dd4 EJ |
864 | && cookie.type == USER_ACTION_COOKIE_SLOW_PATH) { |
865 | return MISS_UPCALL; | |
f5790bf6 | 866 | } else if (userdata_len == MAX(8, sizeof cookie.flow_sample) |
e1ec7dd4 EJ |
867 | && cookie.type == USER_ACTION_COOKIE_FLOW_SAMPLE) { |
868 | return FLOW_SAMPLE_UPCALL; | |
f5790bf6 | 869 | } else if (userdata_len == MAX(8, sizeof cookie.ipfix) |
e1ec7dd4 EJ |
870 | && cookie.type == USER_ACTION_COOKIE_IPFIX) { |
871 | return IPFIX_UPCALL; | |
872 | } else { | |
873 | VLOG_WARN_RL(&rl, "invalid user cookie of type %"PRIu16 | |
34582733 | 874 | " and size %"PRIuSIZE, cookie.type, userdata_len); |
e1ec7dd4 EJ |
875 | return BAD_UPCALL; |
876 | } | |
877 | } | |
878 | ||
e79a6c83 EJ |
879 | /* Calculates slow path actions for 'xout'. 'buf' must statically be |
880 | * initialized with at least 128 bytes of space. */ | |
881 | static void | |
882 | compose_slow_path(struct udpif *udpif, struct xlate_out *xout, | |
cc377352 | 883 | const struct flow *flow, odp_port_t odp_in_port, |
9a159f74 | 884 | struct ofpbuf *buf) |
e79a6c83 EJ |
885 | { |
886 | union user_action_cookie cookie; | |
887 | odp_port_t port; | |
888 | uint32_t pid; | |
889 | ||
890 | cookie.type = USER_ACTION_COOKIE_SLOW_PATH; | |
891 | cookie.slow_path.unused = 0; | |
892 | cookie.slow_path.reason = xout->slow; | |
893 | ||
894 | port = xout->slow & (SLOW_CFM | SLOW_BFD | SLOW_LACP | SLOW_STP) | |
895 | ? ODPP_NONE | |
896 | : odp_in_port; | |
9a159f74 | 897 | pid = dpif_port_get_pid(udpif->dpif, port, flow_hash_5tuple(flow, 0)); |
7321bda3 NM |
898 | odp_put_userspace_action(pid, &cookie, sizeof cookie.slow_path, |
899 | ODPP_NONE, false, buf); | |
e79a6c83 EJ |
900 | } |
901 | ||
3d76b86c AW |
902 | /* If there is no error, the upcall must be destroyed with upcall_uninit() |
903 | * before quiescing, as the referred objects are guaranteed to exist only | |
904 | * until the calling thread quiesces. Otherwise, do not call upcall_uninit() | |
905 | * since the 'upcall->put_actions' remains uninitialized. */ | |
cc377352 EJ |
906 | static int |
907 | upcall_receive(struct upcall *upcall, const struct dpif_backer *backer, | |
cf62fa4c | 908 | const struct dp_packet *packet, enum dpif_upcall_type type, |
7af12bd7 | 909 | const struct nlattr *userdata, const struct flow *flow, |
bd5131ba | 910 | const ovs_u128 *ufid, const unsigned pmd_id) |
cc377352 EJ |
911 | { |
912 | int error; | |
913 | ||
5c476ea3 JR |
914 | error = xlate_lookup(backer, flow, &upcall->ofproto, &upcall->ipfix, |
915 | &upcall->sflow, NULL, &upcall->in_port); | |
cc377352 EJ |
916 | if (error) { |
917 | return error; | |
918 | } | |
919 | ||
e672ff9b JR |
920 | upcall->recirc = NULL; |
921 | upcall->have_recirc_ref = false; | |
cc377352 EJ |
922 | upcall->flow = flow; |
923 | upcall->packet = packet; | |
7af12bd7 | 924 | upcall->ufid = ufid; |
1c1e46ed | 925 | upcall->pmd_id = pmd_id; |
cc377352 EJ |
926 | upcall->type = type; |
927 | upcall->userdata = userdata; | |
928 | ofpbuf_init(&upcall->put_actions, 0); | |
929 | ||
930 | upcall->xout_initialized = false; | |
931 | upcall->vsp_adjusted = false; | |
23597df0 | 932 | upcall->ukey_persists = false; |
cc377352 | 933 | |
23597df0 | 934 | upcall->ukey = NULL; |
cc377352 EJ |
935 | upcall->key = NULL; |
936 | upcall->key_len = 0; | |
937 | ||
8b7ea2d4 | 938 | upcall->out_tun_key = NULL; |
7321bda3 | 939 | upcall->actions = NULL; |
8b7ea2d4 | 940 | |
cc377352 EJ |
941 | return 0; |
942 | } | |
943 | ||
a0bab870 | 944 | static void |
cc377352 EJ |
945 | upcall_xlate(struct udpif *udpif, struct upcall *upcall, |
946 | struct ofpbuf *odp_actions) | |
e1ec7dd4 | 947 | { |
cc377352 | 948 | struct dpif_flow_stats stats; |
691d39b2 | 949 | struct xlate_in xin; |
a0bab870 | 950 | |
cc377352 | 951 | stats.n_packets = 1; |
cf62fa4c | 952 | stats.n_bytes = dp_packet_size(upcall->packet); |
cc377352 EJ |
953 | stats.used = time_msec(); |
954 | stats.tcp_flags = ntohs(upcall->flow->tcp_flags); | |
a0bab870 | 955 | |
cc377352 EJ |
956 | xlate_in_init(&xin, upcall->ofproto, upcall->flow, upcall->in_port, NULL, |
957 | stats.tcp_flags, upcall->packet); | |
958 | xin.odp_actions = odp_actions; | |
a0bab870 | 959 | |
cc377352 EJ |
960 | if (upcall->type == DPIF_UC_MISS) { |
961 | xin.resubmit_stats = &stats; | |
e672ff9b JR |
962 | |
963 | if (xin.recirc) { | |
964 | /* We may install a datapath flow only if we get a reference to the | |
965 | * recirculation context (otherwise we could have recirculation | |
966 | * upcalls using recirculation ID for which no context can be | |
967 | * found). We may still execute the flow's actions even if we | |
968 | * don't install the flow. */ | |
969 | upcall->recirc = xin.recirc; | |
970 | upcall->have_recirc_ref = recirc_id_node_try_ref_rcu(xin.recirc); | |
971 | } | |
a0bab870 | 972 | } else { |
e672ff9b JR |
973 | /* For non-miss upcalls, we are either executing actions (one of which |
974 | * is an userspace action) for an upcall, in which case the stats have | |
975 | * already been taken care of, or there's a flow in the datapath which | |
976 | * this packet was accounted to. Presumably the revalidators will deal | |
a0bab870 | 977 | * with pushing its stats eventually. */ |
e1ec7dd4 EJ |
978 | } |
979 | ||
23597df0 JS |
980 | upcall->dump_seq = seq_read(udpif->dump_seq); |
981 | upcall->reval_seq = seq_read(udpif->reval_seq); | |
a0bab870 | 982 | xlate_actions(&xin, &upcall->xout); |
cc377352 EJ |
983 | upcall->xout_initialized = true; |
984 | ||
985 | /* Special case for fail-open mode. | |
986 | * | |
987 | * If we are in fail-open mode, but we are connected to a controller too, | |
988 | * then we should send the packet up to the controller in the hope that it | |
989 | * will try to set up a flow and thereby allow us to exit fail-open. | |
990 | * | |
991 | * See the top-level comment in fail-open.c for more information. | |
992 | * | |
993 | * Copy packets before they are modified by execution. */ | |
994 | if (upcall->xout.fail_open) { | |
cf62fa4c | 995 | const struct dp_packet *packet = upcall->packet; |
cc377352 EJ |
996 | struct ofproto_packet_in *pin; |
997 | ||
998 | pin = xmalloc(sizeof *pin); | |
cf62fa4c PS |
999 | pin->up.packet = xmemdup(dp_packet_data(packet), dp_packet_size(packet)); |
1000 | pin->up.packet_len = dp_packet_size(packet); | |
cc377352 EJ |
1001 | pin->up.reason = OFPR_NO_MATCH; |
1002 | pin->up.table_id = 0; | |
1003 | pin->up.cookie = OVS_BE64_MAX; | |
50dcbd8e | 1004 | flow_get_metadata(upcall->flow, &pin->up.flow_metadata); |
cc377352 EJ |
1005 | pin->send_len = 0; /* Not used for flow table misses. */ |
1006 | pin->miss_type = OFPROTO_PACKET_IN_NO_MISS; | |
1007 | ofproto_dpif_send_packet_in(upcall->ofproto, pin); | |
1008 | } | |
1009 | ||
1010 | if (!upcall->xout.slow) { | |
1011 | ofpbuf_use_const(&upcall->put_actions, | |
6fd6ed71 PS |
1012 | upcall->xout.odp_actions->data, |
1013 | upcall->xout.odp_actions->size); | |
cc377352 EJ |
1014 | } else { |
1015 | ofpbuf_init(&upcall->put_actions, 0); | |
1016 | compose_slow_path(udpif, &upcall->xout, upcall->flow, | |
1017 | upcall->flow->in_port.odp_port, | |
1018 | &upcall->put_actions); | |
1019 | } | |
23597df0 | 1020 | |
7cde8208 JR |
1021 | /* This function is also called for slow-pathed flows. As we are only |
1022 | * going to create new datapath flows for actual datapath misses, there is | |
1023 | * no point in creating a ukey otherwise. */ | |
1024 | if (upcall->type == DPIF_UC_MISS) { | |
1025 | upcall->ukey = ukey_create_from_upcall(upcall); | |
1026 | } | |
e1ec7dd4 EJ |
1027 | } |
1028 | ||
3eed53e9 | 1029 | static void |
cc377352 | 1030 | upcall_uninit(struct upcall *upcall) |
6b31e073 | 1031 | { |
cc377352 EJ |
1032 | if (upcall) { |
1033 | if (upcall->xout_initialized) { | |
1034 | xlate_out_uninit(&upcall->xout); | |
1035 | } | |
1036 | ofpbuf_uninit(&upcall->put_actions); | |
e672ff9b JR |
1037 | if (upcall->ukey) { |
1038 | if (!upcall->ukey_persists) { | |
1039 | ukey_delete__(upcall->ukey); | |
1040 | } | |
1041 | } else if (upcall->have_recirc_ref) { | |
1042 | /* The reference was transferred to the ukey if one was created. */ | |
1043 | recirc_id_node_unref(upcall->recirc); | |
23597df0 | 1044 | } |
cc377352 | 1045 | } |
6b31e073 RW |
1046 | } |
1047 | ||
623540e4 | 1048 | static int |
cf62fa4c | 1049 | upcall_cb(const struct dp_packet *packet, const struct flow *flow, ovs_u128 *ufid, |
bd5131ba | 1050 | unsigned pmd_id, enum dpif_upcall_type type, |
1c1e46ed AW |
1051 | const struct nlattr *userdata, struct ofpbuf *actions, |
1052 | struct flow_wildcards *wc, struct ofpbuf *put_actions, void *aux) | |
6b31e073 | 1053 | { |
623540e4 EJ |
1054 | struct udpif *udpif = aux; |
1055 | unsigned int flow_limit; | |
1056 | struct upcall upcall; | |
1057 | bool megaflow; | |
1058 | int error; | |
6b31e073 | 1059 | |
b482e960 JR |
1060 | atomic_read_relaxed(&enable_megaflows, &megaflow); |
1061 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); | |
1062 | ||
623540e4 | 1063 | error = upcall_receive(&upcall, udpif->backer, packet, type, userdata, |
1c1e46ed | 1064 | flow, ufid, pmd_id); |
623540e4 | 1065 | if (error) { |
3d76b86c | 1066 | return error; |
6b31e073 | 1067 | } |
6b31e073 | 1068 | |
623540e4 EJ |
1069 | error = process_upcall(udpif, &upcall, actions); |
1070 | if (error) { | |
1071 | goto out; | |
1072 | } | |
cc377352 | 1073 | |
623540e4 | 1074 | if (upcall.xout.slow && put_actions) { |
6fd6ed71 PS |
1075 | ofpbuf_put(put_actions, upcall.put_actions.data, |
1076 | upcall.put_actions.size); | |
623540e4 | 1077 | } |
cc377352 | 1078 | |
b482e960 | 1079 | if (OVS_LIKELY(wc)) { |
623540e4 EJ |
1080 | if (megaflow) { |
1081 | /* XXX: This could be avoided with sufficient API changes. */ | |
1082 | *wc = upcall.xout.wc; | |
1083 | } else { | |
78c9486d | 1084 | flow_wildcards_init_for_packet(wc, flow); |
9a159f74 | 1085 | } |
623540e4 | 1086 | } |
9a159f74 | 1087 | |
623540e4 EJ |
1088 | if (udpif_get_n_flows(udpif) >= flow_limit) { |
1089 | error = ENOSPC; | |
23597df0 JS |
1090 | goto out; |
1091 | } | |
1092 | ||
e672ff9b JR |
1093 | /* Prevent miss flow installation if the key has recirculation ID but we |
1094 | * were not able to get a reference on it. */ | |
1095 | if (type == DPIF_UC_MISS && upcall.recirc && !upcall.have_recirc_ref) { | |
23597df0 | 1096 | error = ENOSPC; |
e672ff9b | 1097 | goto out; |
6b31e073 | 1098 | } |
623540e4 | 1099 | |
e672ff9b JR |
1100 | if (upcall.ukey && !ukey_install(udpif, upcall.ukey)) { |
1101 | error = ENOSPC; | |
1102 | } | |
623540e4 | 1103 | out: |
23597df0 JS |
1104 | if (!error) { |
1105 | upcall.ukey_persists = true; | |
1106 | } | |
623540e4 EJ |
1107 | upcall_uninit(&upcall); |
1108 | return error; | |
6b31e073 | 1109 | } |
10e57640 | 1110 | |
3eed53e9 | 1111 | static int |
cc377352 EJ |
1112 | process_upcall(struct udpif *udpif, struct upcall *upcall, |
1113 | struct ofpbuf *odp_actions) | |
6b31e073 | 1114 | { |
cc377352 | 1115 | const struct nlattr *userdata = upcall->userdata; |
cf62fa4c | 1116 | const struct dp_packet *packet = upcall->packet; |
cc377352 | 1117 | const struct flow *flow = upcall->flow; |
04a19fb8 | 1118 | |
cc377352 EJ |
1119 | switch (classify_upcall(upcall->type, userdata)) { |
1120 | case MISS_UPCALL: | |
1121 | upcall_xlate(udpif, upcall, odp_actions); | |
1122 | return 0; | |
10e57640 | 1123 | |
6b31e073 | 1124 | case SFLOW_UPCALL: |
cc377352 | 1125 | if (upcall->sflow) { |
6b31e073 | 1126 | union user_action_cookie cookie; |
7321bda3 NM |
1127 | const struct nlattr *actions; |
1128 | int actions_len = 0; | |
1129 | struct dpif_sflow_actions sflow_actions; | |
1130 | memset(&sflow_actions, 0, sizeof sflow_actions); | |
6b31e073 | 1131 | memset(&cookie, 0, sizeof cookie); |
cc377352 | 1132 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.sflow); |
7321bda3 NM |
1133 | if (upcall->actions) { |
1134 | /* Actions were passed up from datapath. */ | |
1135 | actions = nl_attr_get(upcall->actions); | |
1136 | actions_len = nl_attr_get_size(upcall->actions); | |
1137 | if (actions && actions_len) { | |
1138 | dpif_sflow_read_actions(flow, actions, actions_len, | |
1139 | &sflow_actions); | |
1140 | } | |
1141 | } | |
1142 | if (actions_len == 0) { | |
1143 | /* Lookup actions in userspace cache. */ | |
1144 | struct udpif_key *ukey = ukey_lookup(udpif, upcall->ufid); | |
1145 | if (ukey) { | |
1146 | actions = ukey->actions->data; | |
1147 | actions_len = ukey->actions->size; | |
1148 | dpif_sflow_read_actions(flow, actions, actions_len, | |
1149 | &sflow_actions); | |
1150 | } | |
1151 | } | |
cc377352 | 1152 | dpif_sflow_received(upcall->sflow, packet, flow, |
7321bda3 NM |
1153 | flow->in_port.odp_port, &cookie, |
1154 | actions_len > 0 ? &sflow_actions : NULL); | |
6b31e073 RW |
1155 | } |
1156 | break; | |
cc377352 | 1157 | |
6b31e073 | 1158 | case IPFIX_UPCALL: |
cc377352 | 1159 | if (upcall->ipfix) { |
8b7ea2d4 WZ |
1160 | union user_action_cookie cookie; |
1161 | struct flow_tnl output_tunnel_key; | |
1162 | ||
1163 | memset(&cookie, 0, sizeof cookie); | |
1164 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.ipfix); | |
1165 | ||
1166 | if (upcall->out_tun_key) { | |
8b7ea2d4 WZ |
1167 | odp_tun_key_from_attr(upcall->out_tun_key, |
1168 | &output_tunnel_key); | |
1169 | } | |
1170 | dpif_ipfix_bridge_sample(upcall->ipfix, packet, flow, | |
1171 | flow->in_port.odp_port, | |
1172 | cookie.ipfix.output_odp_port, | |
1173 | upcall->out_tun_key ? | |
1174 | &output_tunnel_key : NULL); | |
6b31e073 RW |
1175 | } |
1176 | break; | |
cc377352 | 1177 | |
6b31e073 | 1178 | case FLOW_SAMPLE_UPCALL: |
cc377352 | 1179 | if (upcall->ipfix) { |
6b31e073 RW |
1180 | union user_action_cookie cookie; |
1181 | ||
1182 | memset(&cookie, 0, sizeof cookie); | |
cc377352 | 1183 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.flow_sample); |
6b31e073 RW |
1184 | |
1185 | /* The flow reflects exactly the contents of the packet. | |
1186 | * Sample the packet using it. */ | |
cc377352 | 1187 | dpif_ipfix_flow_sample(upcall->ipfix, packet, flow, |
6b31e073 RW |
1188 | cookie.flow_sample.collector_set_id, |
1189 | cookie.flow_sample.probability, | |
1190 | cookie.flow_sample.obs_domain_id, | |
1191 | cookie.flow_sample.obs_point_id); | |
e1ec7dd4 | 1192 | } |
6b31e073 | 1193 | break; |
cc377352 | 1194 | |
6b31e073 RW |
1195 | case BAD_UPCALL: |
1196 | break; | |
6b31e073 | 1197 | } |
10e57640 | 1198 | |
cc377352 | 1199 | return EAGAIN; |
9a159f74 AW |
1200 | } |
1201 | ||
1202 | static void | |
6b31e073 | 1203 | handle_upcalls(struct udpif *udpif, struct upcall *upcalls, |
a0bab870 | 1204 | size_t n_upcalls) |
9a159f74 | 1205 | { |
a0bab870 | 1206 | struct dpif_op *opsp[UPCALL_MAX_BATCH * 2]; |
6dad4d44 | 1207 | struct ukey_op ops[UPCALL_MAX_BATCH * 2]; |
9a159f74 | 1208 | unsigned int flow_limit; |
23597df0 | 1209 | size_t n_ops, n_opsp, i; |
cc377352 | 1210 | bool may_put; |
b482e960 JR |
1211 | bool megaflow; |
1212 | ||
1213 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); | |
1214 | atomic_read_relaxed(&enable_megaflows, &megaflow); | |
9a159f74 | 1215 | |
9a159f74 AW |
1216 | may_put = udpif_get_n_flows(udpif) < flow_limit; |
1217 | ||
a0bab870 | 1218 | /* Handle the packets individually in order of arrival. |
04a19fb8 BP |
1219 | * |
1220 | * - For SLOW_CFM, SLOW_LACP, SLOW_STP, and SLOW_BFD, translation is what | |
1221 | * processes received packets for these protocols. | |
1222 | * | |
1223 | * - For SLOW_CONTROLLER, translation sends the packet to the OpenFlow | |
1224 | * controller. | |
1225 | * | |
1226 | * The loop fills 'ops' with an array of operations to execute in the | |
1227 | * datapath. */ | |
1228 | n_ops = 0; | |
9a159f74 AW |
1229 | for (i = 0; i < n_upcalls; i++) { |
1230 | struct upcall *upcall = &upcalls[i]; | |
cf62fa4c | 1231 | const struct dp_packet *packet = upcall->packet; |
6dad4d44 | 1232 | struct ukey_op *op; |
d02c42bf | 1233 | |
cc377352 EJ |
1234 | if (upcall->vsp_adjusted) { |
1235 | /* This packet was received on a VLAN splinter port. We added a | |
1236 | * VLAN to the packet to make the packet resemble the flow, but the | |
1237 | * actions were composed assuming that the packet contained no | |
1238 | * VLAN. So, we must remove the VLAN header from the packet before | |
1239 | * trying to execute the actions. */ | |
6fd6ed71 | 1240 | if (upcall->xout.odp_actions->size) { |
cf62fa4c | 1241 | eth_pop_vlan(CONST_CAST(struct dp_packet *, upcall->packet)); |
d02c42bf AZ |
1242 | } |
1243 | ||
1244 | /* Remove the flow vlan tags inserted by vlan splinter logic | |
1245 | * to ensure megaflow masks generated match the data path flow. */ | |
cc377352 | 1246 | CONST_CAST(struct flow *, upcall->flow)->vlan_tci = 0; |
e79a6c83 | 1247 | } |
04a19fb8 | 1248 | |
73e141f9 BP |
1249 | /* Do not install a flow into the datapath if: |
1250 | * | |
1251 | * - The datapath already has too many flows. | |
1252 | * | |
73e141f9 | 1253 | * - We received this packet via some flow installed in the kernel |
e672ff9b JR |
1254 | * already. |
1255 | * | |
1256 | * - Upcall was a recirculation but we do not have a reference to | |
1257 | * to the recirculation ID. */ | |
1258 | if (may_put && upcall->type == DPIF_UC_MISS && | |
1259 | (!upcall->recirc || upcall->have_recirc_ref)) { | |
bc2df54d | 1260 | struct udpif_key *ukey = upcall->ukey; |
d02c42bf | 1261 | |
23597df0 | 1262 | upcall->ukey_persists = true; |
bc2df54d | 1263 | op = &ops[n_ops++]; |
7af12bd7 | 1264 | |
bc2df54d | 1265 | op->ukey = ukey; |
6dad4d44 JS |
1266 | op->dop.type = DPIF_OP_FLOW_PUT; |
1267 | op->dop.u.flow_put.flags = DPIF_FP_CREATE; | |
bc2df54d JS |
1268 | op->dop.u.flow_put.key = ukey->key; |
1269 | op->dop.u.flow_put.key_len = ukey->key_len; | |
1270 | op->dop.u.flow_put.mask = ukey->mask; | |
1271 | op->dop.u.flow_put.mask_len = ukey->mask_len; | |
70e5ed6f | 1272 | op->dop.u.flow_put.ufid = upcall->ufid; |
6dad4d44 | 1273 | op->dop.u.flow_put.stats = NULL; |
6fd6ed71 PS |
1274 | op->dop.u.flow_put.actions = ukey->actions->data; |
1275 | op->dop.u.flow_put.actions_len = ukey->actions->size; | |
e79a6c83 EJ |
1276 | } |
1277 | ||
6fd6ed71 | 1278 | if (upcall->xout.odp_actions->size) { |
04a19fb8 | 1279 | op = &ops[n_ops++]; |
23597df0 | 1280 | op->ukey = NULL; |
6dad4d44 | 1281 | op->dop.type = DPIF_OP_EXECUTE; |
cf62fa4c | 1282 | op->dop.u.execute.packet = CONST_CAST(struct dp_packet *, packet); |
a0bab870 | 1283 | odp_key_to_pkt_metadata(upcall->key, upcall->key_len, |
cf62fa4c | 1284 | &op->dop.u.execute.packet->md); |
6fd6ed71 PS |
1285 | op->dop.u.execute.actions = upcall->xout.odp_actions->data; |
1286 | op->dop.u.execute.actions_len = upcall->xout.odp_actions->size; | |
6dad4d44 JS |
1287 | op->dop.u.execute.needs_help = (upcall->xout.slow & SLOW_ACTION) != 0; |
1288 | op->dop.u.execute.probe = false; | |
04a19fb8 | 1289 | } |
e1ec7dd4 | 1290 | } |
e1ec7dd4 | 1291 | |
23597df0 JS |
1292 | /* Execute batch. |
1293 | * | |
1294 | * We install ukeys before installing the flows, locking them for exclusive | |
1295 | * access by this thread for the period of installation. This ensures that | |
1296 | * other threads won't attempt to delete the flows as we are creating them. | |
1297 | */ | |
1298 | n_opsp = 0; | |
da546e07 | 1299 | for (i = 0; i < n_ops; i++) { |
23597df0 JS |
1300 | struct udpif_key *ukey = ops[i].ukey; |
1301 | ||
1302 | if (ukey) { | |
1303 | /* If we can't install the ukey, don't install the flow. */ | |
1304 | if (!ukey_install_start(udpif, ukey)) { | |
1305 | ukey_delete__(ukey); | |
1306 | ops[i].ukey = NULL; | |
1307 | continue; | |
1308 | } | |
1309 | } | |
1310 | opsp[n_opsp++] = &ops[i].dop; | |
1311 | } | |
1312 | dpif_operate(udpif->dpif, opsp, n_opsp); | |
1313 | for (i = 0; i < n_ops; i++) { | |
1314 | if (ops[i].ukey) { | |
1315 | ukey_install_finish(ops[i].ukey, ops[i].dop.error); | |
1316 | } | |
da546e07 | 1317 | } |
e79a6c83 EJ |
1318 | } |
1319 | ||
7af12bd7 JS |
1320 | static uint32_t |
1321 | get_ufid_hash(const ovs_u128 *ufid) | |
1322 | { | |
1323 | return ufid->u32[0]; | |
1324 | } | |
1325 | ||
e79a6c83 | 1326 | static struct udpif_key * |
7af12bd7 | 1327 | ukey_lookup(struct udpif *udpif, const ovs_u128 *ufid) |
e79a6c83 EJ |
1328 | { |
1329 | struct udpif_key *ukey; | |
7af12bd7 JS |
1330 | int idx = get_ufid_hash(ufid) % N_UMAPS; |
1331 | struct cmap *cmap = &udpif->ukeys[idx].cmap; | |
e79a6c83 | 1332 | |
7af12bd7 | 1333 | CMAP_FOR_EACH_WITH_HASH (ukey, cmap_node, get_ufid_hash(ufid), cmap) { |
bdd7ecf5 | 1334 | if (ovs_u128_equals(&ukey->ufid, ufid)) { |
e79a6c83 EJ |
1335 | return ukey; |
1336 | } | |
1337 | } | |
1338 | return NULL; | |
1339 | } | |
1340 | ||
13bb6ed0 | 1341 | static struct udpif_key * |
7af12bd7 | 1342 | ukey_create__(const struct nlattr *key, size_t key_len, |
bc2df54d | 1343 | const struct nlattr *mask, size_t mask_len, |
70e5ed6f | 1344 | bool ufid_present, const ovs_u128 *ufid, |
bd5131ba | 1345 | const unsigned pmd_id, const struct ofpbuf *actions, |
e672ff9b JR |
1346 | uint64_t dump_seq, uint64_t reval_seq, long long int used, |
1347 | const struct recirc_id_node *key_recirc, struct xlate_out *xout) | |
feca8bd7 | 1348 | OVS_NO_THREAD_SAFETY_ANALYSIS |
13bb6ed0 | 1349 | { |
e672ff9b JR |
1350 | unsigned n_recircs = (key_recirc ? 1 : 0) + (xout ? xout->n_recircs : 0); |
1351 | struct udpif_key *ukey = xmalloc(sizeof *ukey + | |
1352 | n_recircs * sizeof *ukey->recircs); | |
13bb6ed0 | 1353 | |
bc2df54d JS |
1354 | memcpy(&ukey->keybuf, key, key_len); |
1355 | ukey->key = &ukey->keybuf.nla; | |
1356 | ukey->key_len = key_len; | |
1357 | memcpy(&ukey->maskbuf, mask, mask_len); | |
1358 | ukey->mask = &ukey->maskbuf.nla; | |
1359 | ukey->mask_len = mask_len; | |
70e5ed6f | 1360 | ukey->ufid_present = ufid_present; |
7af12bd7 | 1361 | ukey->ufid = *ufid; |
1c1e46ed | 1362 | ukey->pmd_id = pmd_id; |
7af12bd7 | 1363 | ukey->hash = get_ufid_hash(&ukey->ufid); |
bc2df54d | 1364 | ukey->actions = ofpbuf_clone(actions); |
23597df0 JS |
1365 | |
1366 | ovs_mutex_init(&ukey->mutex); | |
1367 | ukey->dump_seq = dump_seq; | |
1368 | ukey->reval_seq = reval_seq; | |
1369 | ukey->flow_exists = false; | |
1370 | ukey->created = time_msec(); | |
13bb6ed0 | 1371 | memset(&ukey->stats, 0, sizeof ukey->stats); |
23597df0 | 1372 | ukey->stats.used = used; |
b256dc52 | 1373 | ukey->xcache = NULL; |
13bb6ed0 | 1374 | |
e672ff9b JR |
1375 | ukey->n_recircs = n_recircs; |
1376 | if (key_recirc) { | |
1377 | ukey->recircs[0] = key_recirc->id; | |
1378 | } | |
1379 | if (xout && xout->n_recircs) { | |
1380 | const uint32_t *act_recircs = xlate_out_get_recircs(xout); | |
1381 | ||
1382 | memcpy(ukey->recircs + (key_recirc ? 1 : 0), act_recircs, | |
1383 | xout->n_recircs * sizeof *ukey->recircs); | |
1384 | xlate_out_take_recircs(xout); | |
1385 | } | |
13bb6ed0 JS |
1386 | return ukey; |
1387 | } | |
1388 | ||
23597df0 | 1389 | static struct udpif_key * |
e672ff9b | 1390 | ukey_create_from_upcall(struct upcall *upcall) |
23597df0 | 1391 | { |
bc2df54d JS |
1392 | struct odputil_keybuf keystub, maskstub; |
1393 | struct ofpbuf keybuf, maskbuf; | |
2494ccd7 | 1394 | bool megaflow; |
5262eea1 JG |
1395 | struct odp_flow_key_parms odp_parms = { |
1396 | .flow = upcall->flow, | |
1397 | .mask = &upcall->xout.wc.masks, | |
1398 | }; | |
bc2df54d | 1399 | |
2494ccd7 | 1400 | odp_parms.support = ofproto_dpif_get_support(upcall->ofproto)->odp; |
bc2df54d JS |
1401 | if (upcall->key_len) { |
1402 | ofpbuf_use_const(&keybuf, upcall->key, upcall->key_len); | |
1403 | } else { | |
1404 | /* dpif-netdev doesn't provide a netlink-formatted flow key in the | |
1405 | * upcall, so convert the upcall's flow here. */ | |
1406 | ofpbuf_use_stack(&keybuf, &keystub, sizeof keystub); | |
5262eea1 | 1407 | odp_parms.odp_in_port = upcall->flow->in_port.odp_port; |
5262eea1 | 1408 | odp_flow_key_from_flow(&odp_parms, &keybuf); |
bc2df54d JS |
1409 | } |
1410 | ||
1411 | atomic_read_relaxed(&enable_megaflows, &megaflow); | |
bc2df54d JS |
1412 | ofpbuf_use_stack(&maskbuf, &maskstub, sizeof maskstub); |
1413 | if (megaflow) { | |
5262eea1 | 1414 | odp_parms.odp_in_port = ODPP_NONE; |
ec1f6f32 | 1415 | odp_parms.key_buf = &keybuf; |
bc2df54d | 1416 | |
5262eea1 | 1417 | odp_flow_key_from_mask(&odp_parms, &maskbuf); |
bc2df54d JS |
1418 | } |
1419 | ||
6fd6ed71 | 1420 | return ukey_create__(keybuf.data, keybuf.size, maskbuf.data, maskbuf.size, |
1c1e46ed AW |
1421 | true, upcall->ufid, upcall->pmd_id, |
1422 | &upcall->put_actions, upcall->dump_seq, | |
e672ff9b JR |
1423 | upcall->reval_seq, 0, |
1424 | upcall->have_recirc_ref ? upcall->recirc : NULL, | |
1425 | &upcall->xout); | |
23597df0 JS |
1426 | } |
1427 | ||
64bb477f | 1428 | static int |
23597df0 | 1429 | ukey_create_from_dpif_flow(const struct udpif *udpif, |
64bb477f JS |
1430 | const struct dpif_flow *flow, |
1431 | struct udpif_key **ukey) | |
23597df0 | 1432 | { |
64bb477f | 1433 | struct dpif_flow full_flow; |
bc2df54d | 1434 | struct ofpbuf actions; |
23597df0 | 1435 | uint64_t dump_seq, reval_seq; |
64bb477f | 1436 | uint64_t stub[DPIF_FLOW_BUFSIZE / 8]; |
e672ff9b JR |
1437 | const struct nlattr *a; |
1438 | unsigned int left; | |
64bb477f | 1439 | |
e672ff9b | 1440 | if (!flow->key_len || !flow->actions_len) { |
64bb477f JS |
1441 | struct ofpbuf buf; |
1442 | int err; | |
1443 | ||
e672ff9b JR |
1444 | /* If the key or actions were not provided by the datapath, fetch the |
1445 | * full flow. */ | |
64bb477f | 1446 | ofpbuf_use_stack(&buf, &stub, sizeof stub); |
1c1e46ed AW |
1447 | err = dpif_flow_get(udpif->dpif, NULL, 0, &flow->ufid, |
1448 | flow->pmd_id, &buf, &full_flow); | |
64bb477f JS |
1449 | if (err) { |
1450 | return err; | |
1451 | } | |
1452 | flow = &full_flow; | |
1453 | } | |
e672ff9b JR |
1454 | |
1455 | /* Check the flow actions for recirculation action. As recirculation | |
1456 | * relies on OVS userspace internal state, we need to delete all old | |
1457 | * datapath flows with recirculation upon OVS restart. */ | |
1458 | NL_ATTR_FOR_EACH_UNSAFE (a, left, flow->actions, flow->actions_len) { | |
1459 | if (nl_attr_type(a) == OVS_ACTION_ATTR_RECIRC) { | |
1460 | return EINVAL; | |
1461 | } | |
1462 | } | |
1463 | ||
23597df0 JS |
1464 | dump_seq = seq_read(udpif->dump_seq); |
1465 | reval_seq = seq_read(udpif->reval_seq); | |
bc2df54d | 1466 | ofpbuf_use_const(&actions, &flow->actions, flow->actions_len); |
64bb477f JS |
1467 | *ukey = ukey_create__(flow->key, flow->key_len, |
1468 | flow->mask, flow->mask_len, flow->ufid_present, | |
1c1e46ed | 1469 | &flow->ufid, flow->pmd_id, &actions, dump_seq, |
e672ff9b | 1470 | reval_seq, flow->stats.used, NULL, NULL); |
1c1e46ed | 1471 | |
64bb477f | 1472 | return 0; |
23597df0 JS |
1473 | } |
1474 | ||
1475 | /* Attempts to insert a ukey into the shared ukey maps. | |
1476 | * | |
1477 | * On success, returns true, installs the ukey and returns it in a locked | |
1478 | * state. Otherwise, returns false. */ | |
1479 | static bool | |
1480 | ukey_install_start(struct udpif *udpif, struct udpif_key *new_ukey) | |
1481 | OVS_TRY_LOCK(true, new_ukey->mutex) | |
1482 | { | |
1483 | struct umap *umap; | |
1484 | struct udpif_key *old_ukey; | |
1485 | uint32_t idx; | |
1486 | bool locked = false; | |
1487 | ||
1488 | idx = new_ukey->hash % N_UMAPS; | |
1489 | umap = &udpif->ukeys[idx]; | |
1490 | ovs_mutex_lock(&umap->mutex); | |
7af12bd7 | 1491 | old_ukey = ukey_lookup(udpif, &new_ukey->ufid); |
23597df0 JS |
1492 | if (old_ukey) { |
1493 | /* Uncommon case: A ukey is already installed with the same UFID. */ | |
1494 | if (old_ukey->key_len == new_ukey->key_len | |
1495 | && !memcmp(old_ukey->key, new_ukey->key, new_ukey->key_len)) { | |
1496 | COVERAGE_INC(handler_duplicate_upcall); | |
1497 | } else { | |
1498 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1499 | ||
70e5ed6f JS |
1500 | odp_format_ufid(&old_ukey->ufid, &ds); |
1501 | ds_put_cstr(&ds, " "); | |
23597df0 JS |
1502 | odp_flow_key_format(old_ukey->key, old_ukey->key_len, &ds); |
1503 | ds_put_cstr(&ds, "\n"); | |
70e5ed6f JS |
1504 | odp_format_ufid(&new_ukey->ufid, &ds); |
1505 | ds_put_cstr(&ds, " "); | |
23597df0 JS |
1506 | odp_flow_key_format(new_ukey->key, new_ukey->key_len, &ds); |
1507 | ||
1508 | VLOG_WARN_RL(&rl, "Conflicting ukey for flows:\n%s", ds_cstr(&ds)); | |
1509 | ds_destroy(&ds); | |
1510 | } | |
1511 | } else { | |
1512 | ovs_mutex_lock(&new_ukey->mutex); | |
1513 | cmap_insert(&umap->cmap, &new_ukey->cmap_node, new_ukey->hash); | |
1514 | locked = true; | |
1515 | } | |
1516 | ovs_mutex_unlock(&umap->mutex); | |
1517 | ||
1518 | return locked; | |
1519 | } | |
1520 | ||
1521 | static void | |
1522 | ukey_install_finish__(struct udpif_key *ukey) OVS_REQUIRES(ukey->mutex) | |
1523 | { | |
1524 | ukey->flow_exists = true; | |
1525 | } | |
1526 | ||
1527 | static bool | |
1528 | ukey_install_finish(struct udpif_key *ukey, int error) | |
1529 | OVS_RELEASES(ukey->mutex) | |
1530 | { | |
1531 | if (!error) { | |
1532 | ukey_install_finish__(ukey); | |
1533 | } | |
1534 | ovs_mutex_unlock(&ukey->mutex); | |
1535 | ||
1536 | return !error; | |
1537 | } | |
1538 | ||
1539 | static bool | |
1540 | ukey_install(struct udpif *udpif, struct udpif_key *ukey) | |
1541 | { | |
1542 | /* The usual way to keep 'ukey->flow_exists' in sync with the datapath is | |
1543 | * to call ukey_install_start(), install the corresponding datapath flow, | |
1544 | * then call ukey_install_finish(). The netdev interface using upcall_cb() | |
1545 | * doesn't provide a function to separately finish the flow installation, | |
1546 | * so we perform the operations together here. | |
1547 | * | |
1548 | * This is fine currently, as revalidator threads will only delete this | |
1549 | * ukey during revalidator_sweep() and only if the dump_seq is mismatched. | |
1550 | * It is unlikely for a revalidator thread to advance dump_seq and reach | |
1551 | * the next GC phase between ukey creation and flow installation. */ | |
1552 | return ukey_install_start(udpif, ukey) && ukey_install_finish(ukey, 0); | |
1553 | } | |
1554 | ||
1555 | /* Searches for a ukey in 'udpif->ukeys' that matches 'flow' and attempts to | |
1556 | * lock the ukey. If the ukey does not exist, create it. | |
7d170098 | 1557 | * |
64bb477f JS |
1558 | * Returns 0 on success, setting *result to the matching ukey and returning it |
1559 | * in a locked state. Otherwise, returns an errno and clears *result. EBUSY | |
1560 | * indicates that another thread is handling this flow. Other errors indicate | |
1561 | * an unexpected condition creating a new ukey. | |
1562 | * | |
1563 | * *error is an output parameter provided to appease the threadsafety analyser, | |
1564 | * and its value matches the return value. */ | |
23597df0 JS |
1565 | static int |
1566 | ukey_acquire(struct udpif *udpif, const struct dpif_flow *flow, | |
64bb477f JS |
1567 | struct udpif_key **result, int *error) |
1568 | OVS_TRY_LOCK(0, (*result)->mutex) | |
7d170098 | 1569 | { |
feca8bd7 | 1570 | struct udpif_key *ukey; |
64bb477f | 1571 | int retval; |
feca8bd7 | 1572 | |
7af12bd7 | 1573 | ukey = ukey_lookup(udpif, &flow->ufid); |
23597df0 | 1574 | if (ukey) { |
64bb477f | 1575 | retval = ovs_mutex_trylock(&ukey->mutex); |
23597df0 | 1576 | } else { |
23597df0 JS |
1577 | /* Usually we try to avoid installing flows from revalidator threads, |
1578 | * because locking on a umap may cause handler threads to block. | |
1579 | * However there are certain cases, like when ovs-vswitchd is | |
1580 | * restarted, where it is desirable to handle flows that exist in the | |
1581 | * datapath gracefully (ie, don't just clear the datapath). */ | |
64bb477f JS |
1582 | bool install; |
1583 | ||
1584 | retval = ukey_create_from_dpif_flow(udpif, flow, &ukey); | |
1585 | if (retval) { | |
1586 | goto done; | |
1587 | } | |
1588 | install = ukey_install_start(udpif, ukey); | |
1589 | if (install) { | |
23597df0 | 1590 | ukey_install_finish__(ukey); |
64bb477f | 1591 | retval = 0; |
23597df0 JS |
1592 | } else { |
1593 | ukey_delete__(ukey); | |
64bb477f | 1594 | retval = EBUSY; |
23597df0 | 1595 | } |
7d170098 | 1596 | } |
7d170098 | 1597 | |
64bb477f JS |
1598 | done: |
1599 | *error = retval; | |
1600 | if (retval) { | |
feca8bd7 | 1601 | *result = NULL; |
64bb477f JS |
1602 | } else { |
1603 | *result = ukey; | |
feca8bd7 | 1604 | } |
64bb477f | 1605 | return retval; |
7d170098 EJ |
1606 | } |
1607 | ||
e79a6c83 | 1608 | static void |
9fce0584 | 1609 | ukey_delete__(struct udpif_key *ukey) |
7d170098 | 1610 | OVS_NO_THREAD_SAFETY_ANALYSIS |
e79a6c83 | 1611 | { |
23597df0 | 1612 | if (ukey) { |
e672ff9b JR |
1613 | for (int i = 0; i < ukey->n_recircs; i++) { |
1614 | recirc_free_id(ukey->recircs[i]); | |
1615 | } | |
23597df0 | 1616 | xlate_cache_delete(ukey->xcache); |
bc2df54d | 1617 | ofpbuf_delete(ukey->actions); |
23597df0 JS |
1618 | ovs_mutex_destroy(&ukey->mutex); |
1619 | free(ukey); | |
1620 | } | |
e79a6c83 EJ |
1621 | } |
1622 | ||
9fce0584 | 1623 | static void |
b8d3daeb JS |
1624 | ukey_delete(struct umap *umap, struct udpif_key *ukey) |
1625 | OVS_REQUIRES(umap->mutex) | |
9fce0584 | 1626 | { |
b8d3daeb | 1627 | cmap_remove(&umap->cmap, &ukey->cmap_node, ukey->hash); |
9fce0584 JS |
1628 | ovsrcu_postpone(ukey_delete__, ukey); |
1629 | } | |
1630 | ||
698ffe36 | 1631 | static bool |
49fae772 JS |
1632 | should_revalidate(const struct udpif *udpif, uint64_t packets, |
1633 | long long int used) | |
698ffe36 JS |
1634 | { |
1635 | long long int metric, now, duration; | |
1636 | ||
49fae772 JS |
1637 | if (udpif->dump_duration < 200) { |
1638 | /* We are likely to handle full revalidation for the flows. */ | |
1639 | return true; | |
1640 | } | |
1641 | ||
698ffe36 JS |
1642 | /* Calculate the mean time between seeing these packets. If this |
1643 | * exceeds the threshold, then delete the flow rather than performing | |
1644 | * costly revalidation for flows that aren't being hit frequently. | |
1645 | * | |
1646 | * This is targeted at situations where the dump_duration is high (~1s), | |
1647 | * and revalidation is triggered by a call to udpif_revalidate(). In | |
1648 | * these situations, revalidation of all flows causes fluctuations in the | |
1649 | * flow_limit due to the interaction with the dump_duration and max_idle. | |
1650 | * This tends to result in deletion of low-throughput flows anyway, so | |
1651 | * skip the revalidation and just delete those flows. */ | |
1652 | packets = MAX(packets, 1); | |
1653 | now = MAX(used, time_msec()); | |
1654 | duration = now - used; | |
1655 | metric = duration / packets; | |
1656 | ||
49fae772 JS |
1657 | if (metric < 200) { |
1658 | /* The flow is receiving more than ~5pps, so keep it. */ | |
1659 | return true; | |
698ffe36 | 1660 | } |
49fae772 | 1661 | return false; |
698ffe36 JS |
1662 | } |
1663 | ||
e79a6c83 | 1664 | static bool |
7d170098 | 1665 | revalidate_ukey(struct udpif *udpif, struct udpif_key *ukey, |
bc2df54d | 1666 | const struct dpif_flow_stats *stats, uint64_t reval_seq) |
acaa8dac | 1667 | OVS_REQUIRES(ukey->mutex) |
e79a6c83 | 1668 | { |
e79a6c83 EJ |
1669 | uint64_t slow_path_buf[128 / 8]; |
1670 | struct xlate_out xout, *xoutp; | |
42f3baca | 1671 | struct netflow *netflow; |
e79a6c83 EJ |
1672 | struct ofproto_dpif *ofproto; |
1673 | struct dpif_flow_stats push; | |
7d170098 EJ |
1674 | struct ofpbuf xout_actions; |
1675 | struct flow flow, dp_mask; | |
d70e8c28 | 1676 | uint64_t *dp64, *xout64; |
cc377352 | 1677 | ofp_port_t ofp_in_port; |
e79a6c83 | 1678 | struct xlate_in xin; |
698ffe36 | 1679 | long long int last_used; |
e79a6c83 EJ |
1680 | int error; |
1681 | size_t i; | |
0725e747 | 1682 | bool ok; |
23597df0 | 1683 | bool need_revalidate; |
e79a6c83 EJ |
1684 | |
1685 | ok = false; | |
1686 | xoutp = NULL; | |
42f3baca | 1687 | netflow = NULL; |
e79a6c83 | 1688 | |
23597df0 | 1689 | need_revalidate = (ukey->reval_seq != reval_seq); |
698ffe36 | 1690 | last_used = ukey->stats.used; |
bc2df54d JS |
1691 | push.used = stats->used; |
1692 | push.tcp_flags = stats->tcp_flags; | |
1693 | push.n_packets = (stats->n_packets > ukey->stats.n_packets | |
1694 | ? stats->n_packets - ukey->stats.n_packets | |
ac64794a | 1695 | : 0); |
bc2df54d JS |
1696 | push.n_bytes = (stats->n_bytes > ukey->stats.n_bytes |
1697 | ? stats->n_bytes - ukey->stats.n_bytes | |
ac64794a | 1698 | : 0); |
e79a6c83 | 1699 | |
23597df0 | 1700 | if (need_revalidate && last_used |
49fae772 | 1701 | && !should_revalidate(udpif, push.n_packets, last_used)) { |
698ffe36 JS |
1702 | ok = false; |
1703 | goto exit; | |
1704 | } | |
1705 | ||
28c5588e | 1706 | /* We will push the stats, so update the ukey stats cache. */ |
bc2df54d | 1707 | ukey->stats = *stats; |
23597df0 | 1708 | if (!push.n_packets && !need_revalidate) { |
e79a6c83 EJ |
1709 | ok = true; |
1710 | goto exit; | |
1711 | } | |
1712 | ||
23597df0 | 1713 | if (ukey->xcache && !need_revalidate) { |
0725e747 | 1714 | xlate_push_stats(ukey->xcache, &push); |
df1a9a49 JS |
1715 | ok = true; |
1716 | goto exit; | |
b256dc52 JS |
1717 | } |
1718 | ||
cc377352 EJ |
1719 | if (odp_flow_key_to_flow(ukey->key, ukey->key_len, &flow) |
1720 | == ODP_FIT_ERROR) { | |
1721 | goto exit; | |
1722 | } | |
1723 | ||
5c476ea3 JR |
1724 | error = xlate_lookup(udpif->backer, &flow, &ofproto, NULL, NULL, &netflow, |
1725 | &ofp_in_port); | |
e79a6c83 EJ |
1726 | if (error) { |
1727 | goto exit; | |
1728 | } | |
1729 | ||
23597df0 | 1730 | if (need_revalidate) { |
df1a9a49 JS |
1731 | xlate_cache_clear(ukey->xcache); |
1732 | } | |
b256dc52 JS |
1733 | if (!ukey->xcache) { |
1734 | ukey->xcache = xlate_cache_new(); | |
1735 | } | |
1736 | ||
cc377352 EJ |
1737 | xlate_in_init(&xin, ofproto, &flow, ofp_in_port, NULL, push.tcp_flags, |
1738 | NULL); | |
0725e747 BP |
1739 | if (push.n_packets) { |
1740 | xin.resubmit_stats = &push; | |
1741 | xin.may_learn = true; | |
1742 | } | |
b256dc52 | 1743 | xin.xcache = ukey->xcache; |
23597df0 | 1744 | xin.skip_wildcards = !need_revalidate; |
e79a6c83 EJ |
1745 | xlate_actions(&xin, &xout); |
1746 | xoutp = &xout; | |
ddeca9a4 | 1747 | |
23597df0 | 1748 | if (!need_revalidate) { |
e79a6c83 EJ |
1749 | ok = true; |
1750 | goto exit; | |
1751 | } | |
1752 | ||
1753 | if (!xout.slow) { | |
6fd6ed71 PS |
1754 | ofpbuf_use_const(&xout_actions, xout.odp_actions->data, |
1755 | xout.odp_actions->size); | |
05067881 | 1756 | } else { |
e79a6c83 | 1757 | ofpbuf_use_stack(&xout_actions, slow_path_buf, sizeof slow_path_buf); |
cc377352 EJ |
1758 | compose_slow_path(udpif, &xout, &flow, flow.in_port.odp_port, |
1759 | &xout_actions); | |
e79a6c83 EJ |
1760 | } |
1761 | ||
bc2df54d | 1762 | if (!ofpbuf_equal(&xout_actions, ukey->actions)) { |
e79a6c83 EJ |
1763 | goto exit; |
1764 | } | |
1765 | ||
ec1f6f32 JG |
1766 | if (odp_flow_key_to_mask(ukey->mask, ukey->mask_len, ukey->key, |
1767 | ukey->key_len, &dp_mask, &flow) == ODP_FIT_ERROR) { | |
e79a6c83 EJ |
1768 | goto exit; |
1769 | } | |
1770 | ||
1771 | /* Since the kernel is free to ignore wildcarded bits in the mask, we can't | |
1772 | * directly check that the masks are the same. Instead we check that the | |
1773 | * mask in the kernel is more specific i.e. less wildcarded, than what | |
1774 | * we've calculated here. This guarantees we don't catch any packets we | |
1775 | * shouldn't with the megaflow. */ | |
d70e8c28 JR |
1776 | dp64 = (uint64_t *) &dp_mask; |
1777 | xout64 = (uint64_t *) &xout.wc.masks; | |
1778 | for (i = 0; i < FLOW_U64S; i++) { | |
1779 | if ((dp64[i] | xout64[i]) != dp64[i]) { | |
e79a6c83 EJ |
1780 | goto exit; |
1781 | } | |
1782 | } | |
bc2df54d | 1783 | |
e79a6c83 EJ |
1784 | ok = true; |
1785 | ||
1786 | exit: | |
23597df0 JS |
1787 | if (ok) { |
1788 | ukey->reval_seq = reval_seq; | |
1789 | } | |
dcc2c6cd JR |
1790 | if (netflow && !ok) { |
1791 | netflow_flow_clear(netflow, &flow); | |
42f3baca | 1792 | } |
e79a6c83 EJ |
1793 | xlate_out_uninit(xoutp); |
1794 | return ok; | |
1795 | } | |
1796 | ||
64bb477f | 1797 | static void |
8e1ffd75 JS |
1798 | delete_op_init__(struct udpif *udpif, struct ukey_op *op, |
1799 | const struct dpif_flow *flow) | |
64bb477f | 1800 | { |
4c438b67 | 1801 | op->ukey = NULL; |
64bb477f JS |
1802 | op->dop.type = DPIF_OP_FLOW_DEL; |
1803 | op->dop.u.flow_del.key = flow->key; | |
1804 | op->dop.u.flow_del.key_len = flow->key_len; | |
1805 | op->dop.u.flow_del.ufid = flow->ufid_present ? &flow->ufid : NULL; | |
1c1e46ed | 1806 | op->dop.u.flow_del.pmd_id = flow->pmd_id; |
64bb477f | 1807 | op->dop.u.flow_del.stats = &op->stats; |
70f07728 | 1808 | op->dop.u.flow_del.terse = udpif_use_ufid(udpif); |
64bb477f JS |
1809 | } |
1810 | ||
e79a6c83 | 1811 | static void |
8e1ffd75 | 1812 | delete_op_init(struct udpif *udpif, struct ukey_op *op, struct udpif_key *ukey) |
13bb6ed0 JS |
1813 | { |
1814 | op->ukey = ukey; | |
6dad4d44 | 1815 | op->dop.type = DPIF_OP_FLOW_DEL; |
bc2df54d JS |
1816 | op->dop.u.flow_del.key = ukey->key; |
1817 | op->dop.u.flow_del.key_len = ukey->key_len; | |
70e5ed6f | 1818 | op->dop.u.flow_del.ufid = ukey->ufid_present ? &ukey->ufid : NULL; |
1c1e46ed | 1819 | op->dop.u.flow_del.pmd_id = ukey->pmd_id; |
6dad4d44 | 1820 | op->dop.u.flow_del.stats = &op->stats; |
70f07728 | 1821 | op->dop.u.flow_del.terse = udpif_use_ufid(udpif); |
13bb6ed0 JS |
1822 | } |
1823 | ||
1824 | static void | |
6dad4d44 | 1825 | push_ukey_ops__(struct udpif *udpif, struct ukey_op *ops, size_t n_ops) |
e79a6c83 | 1826 | { |
13bb6ed0 JS |
1827 | struct dpif_op *opsp[REVALIDATE_MAX_BATCH]; |
1828 | size_t i; | |
e79a6c83 | 1829 | |
13bb6ed0 JS |
1830 | ovs_assert(n_ops <= REVALIDATE_MAX_BATCH); |
1831 | for (i = 0; i < n_ops; i++) { | |
6dad4d44 | 1832 | opsp[i] = &ops[i].dop; |
13bb6ed0 JS |
1833 | } |
1834 | dpif_operate(udpif->dpif, opsp, n_ops); | |
1835 | ||
1836 | for (i = 0; i < n_ops; i++) { | |
6dad4d44 | 1837 | struct ukey_op *op = &ops[i]; |
13bb6ed0 JS |
1838 | struct dpif_flow_stats *push, *stats, push_buf; |
1839 | ||
6dad4d44 | 1840 | stats = op->dop.u.flow_del.stats; |
5e73c322 JS |
1841 | push = &push_buf; |
1842 | ||
64bb477f JS |
1843 | if (op->ukey) { |
1844 | ovs_mutex_lock(&op->ukey->mutex); | |
1845 | push->used = MAX(stats->used, op->ukey->stats.used); | |
1846 | push->tcp_flags = stats->tcp_flags | op->ukey->stats.tcp_flags; | |
1847 | push->n_packets = stats->n_packets - op->ukey->stats.n_packets; | |
1848 | push->n_bytes = stats->n_bytes - op->ukey->stats.n_bytes; | |
1849 | ovs_mutex_unlock(&op->ukey->mutex); | |
1850 | } else { | |
1851 | push = stats; | |
1852 | } | |
13bb6ed0 JS |
1853 | |
1854 | if (push->n_packets || netflow_exists()) { | |
64bb477f JS |
1855 | const struct nlattr *key = op->dop.u.flow_del.key; |
1856 | size_t key_len = op->dop.u.flow_del.key_len; | |
13bb6ed0 JS |
1857 | struct ofproto_dpif *ofproto; |
1858 | struct netflow *netflow; | |
cc377352 | 1859 | ofp_port_t ofp_in_port; |
13bb6ed0 | 1860 | struct flow flow; |
5e73c322 | 1861 | int error; |
b256dc52 | 1862 | |
64bb477f JS |
1863 | if (op->ukey) { |
1864 | ovs_mutex_lock(&op->ukey->mutex); | |
1865 | if (op->ukey->xcache) { | |
1866 | xlate_push_stats(op->ukey->xcache, push); | |
1867 | ovs_mutex_unlock(&op->ukey->mutex); | |
1868 | continue; | |
1869 | } | |
7d170098 | 1870 | ovs_mutex_unlock(&op->ukey->mutex); |
64bb477f JS |
1871 | key = op->ukey->key; |
1872 | key_len = op->ukey->key_len; | |
b256dc52 | 1873 | } |
13bb6ed0 | 1874 | |
64bb477f | 1875 | if (odp_flow_key_to_flow(key, key_len, &flow) |
cc377352 EJ |
1876 | == ODP_FIT_ERROR) { |
1877 | continue; | |
1878 | } | |
1879 | ||
e672ff9b JR |
1880 | error = xlate_lookup(udpif->backer, &flow, &ofproto, NULL, NULL, |
1881 | &netflow, &ofp_in_port); | |
5e73c322 | 1882 | if (!error) { |
13bb6ed0 JS |
1883 | struct xlate_in xin; |
1884 | ||
cc377352 EJ |
1885 | xlate_in_init(&xin, ofproto, &flow, ofp_in_port, NULL, |
1886 | push->tcp_flags, NULL); | |
13bb6ed0 | 1887 | xin.resubmit_stats = push->n_packets ? push : NULL; |
0725e747 | 1888 | xin.may_learn = push->n_packets > 0; |
13bb6ed0 JS |
1889 | xin.skip_wildcards = true; |
1890 | xlate_actions_for_side_effects(&xin); | |
1891 | ||
1892 | if (netflow) { | |
13bb6ed0 | 1893 | netflow_flow_clear(netflow, &flow); |
13bb6ed0 JS |
1894 | } |
1895 | } | |
1896 | } | |
1897 | } | |
7d170098 | 1898 | } |
13bb6ed0 | 1899 | |
7d170098 | 1900 | static void |
6dad4d44 JS |
1901 | push_ukey_ops(struct udpif *udpif, struct umap *umap, |
1902 | struct ukey_op *ops, size_t n_ops) | |
7d170098 EJ |
1903 | { |
1904 | int i; | |
13bb6ed0 | 1905 | |
6dad4d44 | 1906 | push_ukey_ops__(udpif, ops, n_ops); |
b8d3daeb | 1907 | ovs_mutex_lock(&umap->mutex); |
7d170098 | 1908 | for (i = 0; i < n_ops; i++) { |
b8d3daeb | 1909 | ukey_delete(umap, ops[i].ukey); |
13bb6ed0 | 1910 | } |
b8d3daeb | 1911 | ovs_mutex_unlock(&umap->mutex); |
13bb6ed0 JS |
1912 | } |
1913 | ||
64bb477f JS |
1914 | static void |
1915 | log_unexpected_flow(const struct dpif_flow *flow, int error) | |
1916 | { | |
1917 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 60); | |
1918 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1919 | ||
1920 | ds_put_format(&ds, "Failed to acquire udpif_key corresponding to " | |
1921 | "unexpected flow (%s): ", ovs_strerror(error)); | |
1922 | odp_format_ufid(&flow->ufid, &ds); | |
1923 | VLOG_WARN_RL(&rl, "%s", ds_cstr(&ds)); | |
1924 | } | |
1925 | ||
13bb6ed0 | 1926 | static void |
7d170098 | 1927 | revalidate(struct revalidator *revalidator) |
13bb6ed0 JS |
1928 | { |
1929 | struct udpif *udpif = revalidator->udpif; | |
ac64794a | 1930 | struct dpif_flow_dump_thread *dump_thread; |
23597df0 | 1931 | uint64_t dump_seq, reval_seq; |
e79a6c83 | 1932 | unsigned int flow_limit; |
e79a6c83 | 1933 | |
efa08531 | 1934 | dump_seq = seq_read(udpif->dump_seq); |
23597df0 | 1935 | reval_seq = seq_read(udpif->reval_seq); |
b482e960 | 1936 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); |
ac64794a BP |
1937 | dump_thread = dpif_flow_dump_thread_create(udpif->dump); |
1938 | for (;;) { | |
6dad4d44 | 1939 | struct ukey_op ops[REVALIDATE_MAX_BATCH]; |
ac64794a | 1940 | int n_ops = 0; |
e79a6c83 | 1941 | |
ac64794a BP |
1942 | struct dpif_flow flows[REVALIDATE_MAX_BATCH]; |
1943 | const struct dpif_flow *f; | |
1944 | int n_dumped; | |
7d170098 | 1945 | |
ac64794a BP |
1946 | long long int max_idle; |
1947 | long long int now; | |
1948 | size_t n_dp_flows; | |
1949 | bool kill_them_all; | |
e79a6c83 | 1950 | |
ac64794a BP |
1951 | n_dumped = dpif_flow_dump_next(dump_thread, flows, ARRAY_SIZE(flows)); |
1952 | if (!n_dumped) { | |
1953 | break; | |
73a3c475 JS |
1954 | } |
1955 | ||
ac64794a BP |
1956 | now = time_msec(); |
1957 | ||
1958 | /* In normal operation we want to keep flows around until they have | |
1959 | * been idle for 'ofproto_max_idle' milliseconds. However: | |
1960 | * | |
1961 | * - If the number of datapath flows climbs above 'flow_limit', | |
1962 | * drop that down to 100 ms to try to bring the flows down to | |
1963 | * the limit. | |
1964 | * | |
1965 | * - If the number of datapath flows climbs above twice | |
1966 | * 'flow_limit', delete all the datapath flows as an emergency | |
1967 | * measure. (We reassess this condition for the next batch of | |
1968 | * datapath flows, so we will recover before all the flows are | |
1969 | * gone.) */ | |
1970 | n_dp_flows = udpif_get_n_flows(udpif); | |
1971 | kill_them_all = n_dp_flows > flow_limit * 2; | |
1972 | max_idle = n_dp_flows > flow_limit ? 100 : ofproto_max_idle; | |
1973 | ||
1974 | for (f = flows; f < &flows[n_dumped]; f++) { | |
1975 | long long int used = f->stats.used; | |
feca8bd7 | 1976 | struct udpif_key *ukey; |
efa08531 | 1977 | bool already_dumped, keep; |
64bb477f | 1978 | int error; |
acaa8dac | 1979 | |
64bb477f JS |
1980 | if (ukey_acquire(udpif, f, &ukey, &error)) { |
1981 | if (error == EBUSY) { | |
1982 | /* Another thread is processing this flow, so don't bother | |
1983 | * processing it.*/ | |
1984 | COVERAGE_INC(upcall_ukey_contention); | |
1985 | } else { | |
1986 | log_unexpected_flow(f, error); | |
c744eb04 | 1987 | if (error != ENOENT) { |
8e1ffd75 | 1988 | delete_op_init__(udpif, &ops[n_ops++], f); |
c744eb04 | 1989 | } |
64bb477f | 1990 | } |
acaa8dac JS |
1991 | continue; |
1992 | } | |
1993 | ||
efa08531 | 1994 | already_dumped = ukey->dump_seq == dump_seq; |
acaa8dac | 1995 | if (already_dumped) { |
ec47af51 JS |
1996 | /* The flow has already been handled during this flow dump |
1997 | * operation. Skip it. */ | |
1998 | if (ukey->xcache) { | |
1999 | COVERAGE_INC(dumped_duplicate_flow); | |
2000 | } else { | |
2001 | COVERAGE_INC(dumped_new_flow); | |
2002 | } | |
acaa8dac JS |
2003 | ovs_mutex_unlock(&ukey->mutex); |
2004 | continue; | |
2005 | } | |
2006 | ||
2007 | if (!used) { | |
2008 | used = ukey->created; | |
2009 | } | |
ac64794a | 2010 | if (kill_them_all || (used && used < now - max_idle)) { |
efa08531 | 2011 | keep = false; |
ac64794a | 2012 | } else { |
bc2df54d | 2013 | keep = revalidate_ukey(udpif, ukey, &f->stats, reval_seq); |
ac64794a | 2014 | } |
efa08531 JS |
2015 | ukey->dump_seq = dump_seq; |
2016 | ukey->flow_exists = keep; | |
e79a6c83 | 2017 | |
efa08531 | 2018 | if (!keep) { |
8e1ffd75 | 2019 | delete_op_init(udpif, &ops[n_ops++], ukey); |
ac64794a | 2020 | } |
acaa8dac | 2021 | ovs_mutex_unlock(&ukey->mutex); |
7d170098 | 2022 | } |
ad3415c0 | 2023 | |
ac64794a | 2024 | if (n_ops) { |
6dad4d44 | 2025 | push_ukey_ops__(udpif, ops, n_ops); |
7d170098 | 2026 | } |
9fce0584 | 2027 | ovsrcu_quiesce(); |
e79a6c83 | 2028 | } |
ac64794a | 2029 | dpif_flow_dump_thread_destroy(dump_thread); |
e79a6c83 EJ |
2030 | } |
2031 | ||
3b62a9d3 | 2032 | static bool |
23597df0 | 2033 | handle_missed_revalidation(struct udpif *udpif, uint64_t reval_seq, |
3b62a9d3 | 2034 | struct udpif_key *ukey) |
3b62a9d3 | 2035 | { |
bc2df54d JS |
2036 | struct dpif_flow_stats stats; |
2037 | bool keep; | |
3b62a9d3 JS |
2038 | |
2039 | COVERAGE_INC(revalidate_missed_dp_flow); | |
2040 | ||
bc2df54d JS |
2041 | memset(&stats, 0, sizeof stats); |
2042 | ovs_mutex_lock(&ukey->mutex); | |
2043 | keep = revalidate_ukey(udpif, ukey, &stats, reval_seq); | |
2044 | ovs_mutex_unlock(&ukey->mutex); | |
3b62a9d3 JS |
2045 | |
2046 | return keep; | |
2047 | } | |
2048 | ||
e79a6c83 | 2049 | static void |
e96a5c24 | 2050 | revalidator_sweep__(struct revalidator *revalidator, bool purge) |
e79a6c83 | 2051 | { |
b8d3daeb | 2052 | struct udpif *udpif; |
23597df0 | 2053 | uint64_t dump_seq, reval_seq; |
b8d3daeb | 2054 | int slice; |
e4b79342 | 2055 | |
b8d3daeb JS |
2056 | udpif = revalidator->udpif; |
2057 | dump_seq = seq_read(udpif->dump_seq); | |
23597df0 | 2058 | reval_seq = seq_read(udpif->reval_seq); |
b8d3daeb JS |
2059 | slice = revalidator - udpif->revalidators; |
2060 | ovs_assert(slice < udpif->n_revalidators); | |
2061 | ||
2062 | for (int i = slice; i < N_UMAPS; i += udpif->n_revalidators) { | |
6dad4d44 | 2063 | struct ukey_op ops[REVALIDATE_MAX_BATCH]; |
b8d3daeb JS |
2064 | struct udpif_key *ukey; |
2065 | struct umap *umap = &udpif->ukeys[i]; | |
2066 | size_t n_ops = 0; | |
e79a6c83 | 2067 | |
b8d3daeb JS |
2068 | CMAP_FOR_EACH(ukey, cmap_node, &umap->cmap) { |
2069 | bool flow_exists, seq_mismatch; | |
a2606936 | 2070 | |
23597df0 JS |
2071 | /* Handler threads could be holding a ukey lock while it installs a |
2072 | * new flow, so don't hang around waiting for access to it. */ | |
2073 | if (ovs_mutex_trylock(&ukey->mutex)) { | |
2074 | continue; | |
2075 | } | |
b8d3daeb JS |
2076 | flow_exists = ukey->flow_exists; |
2077 | seq_mismatch = (ukey->dump_seq != dump_seq | |
23597df0 | 2078 | && ukey->reval_seq != reval_seq); |
b8d3daeb | 2079 | ovs_mutex_unlock(&ukey->mutex); |
a2606936 | 2080 | |
b8d3daeb JS |
2081 | if (flow_exists |
2082 | && (purge | |
2083 | || (seq_mismatch | |
23597df0 JS |
2084 | && !handle_missed_revalidation(udpif, reval_seq, |
2085 | ukey)))) { | |
6dad4d44 | 2086 | struct ukey_op *op = &ops[n_ops++]; |
e4b79342 | 2087 | |
8e1ffd75 | 2088 | delete_op_init(udpif, op, ukey); |
b8d3daeb | 2089 | if (n_ops == REVALIDATE_MAX_BATCH) { |
6dad4d44 | 2090 | push_ukey_ops(udpif, umap, ops, n_ops); |
b8d3daeb JS |
2091 | n_ops = 0; |
2092 | } | |
2093 | } else if (!flow_exists) { | |
2094 | ovs_mutex_lock(&umap->mutex); | |
2095 | ukey_delete(umap, ukey); | |
2096 | ovs_mutex_unlock(&umap->mutex); | |
e4b79342 | 2097 | } |
e79a6c83 | 2098 | } |
e4b79342 | 2099 | |
b8d3daeb | 2100 | if (n_ops) { |
6dad4d44 | 2101 | push_ukey_ops(udpif, umap, ops, n_ops); |
b8d3daeb JS |
2102 | } |
2103 | ovsrcu_quiesce(); | |
e4b79342 | 2104 | } |
e1ec7dd4 | 2105 | } |
e96a5c24 JS |
2106 | |
2107 | static void | |
2108 | revalidator_sweep(struct revalidator *revalidator) | |
2109 | { | |
2110 | revalidator_sweep__(revalidator, false); | |
2111 | } | |
2112 | ||
2113 | static void | |
2114 | revalidator_purge(struct revalidator *revalidator) | |
2115 | { | |
2116 | revalidator_sweep__(revalidator, true); | |
2117 | } | |
e22d52ee EJ |
2118 | \f |
2119 | static void | |
2120 | upcall_unixctl_show(struct unixctl_conn *conn, int argc OVS_UNUSED, | |
2121 | const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) | |
2122 | { | |
2123 | struct ds ds = DS_EMPTY_INITIALIZER; | |
2124 | struct udpif *udpif; | |
2125 | ||
2126 | LIST_FOR_EACH (udpif, list_node, &all_udpifs) { | |
e79a6c83 | 2127 | unsigned int flow_limit; |
64bb477f | 2128 | bool ufid_enabled; |
e22d52ee EJ |
2129 | size_t i; |
2130 | ||
b482e960 | 2131 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); |
70f07728 | 2132 | ufid_enabled = udpif_use_ufid(udpif); |
e79a6c83 | 2133 | |
e22d52ee | 2134 | ds_put_format(&ds, "%s:\n", dpif_name(udpif->dpif)); |
0e2a9f6f | 2135 | ds_put_format(&ds, "\tflows : (current %lu)" |
e79a6c83 EJ |
2136 | " (avg %u) (max %u) (limit %u)\n", udpif_get_n_flows(udpif), |
2137 | udpif->avg_n_flows, udpif->max_n_flows, flow_limit); | |
e79a6c83 | 2138 | ds_put_format(&ds, "\tdump duration : %lldms\n", udpif->dump_duration); |
64bb477f JS |
2139 | ds_put_format(&ds, "\tufid enabled : "); |
2140 | if (ufid_enabled) { | |
2141 | ds_put_format(&ds, "true\n"); | |
2142 | } else { | |
2143 | ds_put_format(&ds, "false\n"); | |
2144 | } | |
e79a6c83 | 2145 | ds_put_char(&ds, '\n'); |
b8d3daeb | 2146 | |
e79a6c83 EJ |
2147 | for (i = 0; i < n_revalidators; i++) { |
2148 | struct revalidator *revalidator = &udpif->revalidators[i]; | |
b8d3daeb | 2149 | int j, elements = 0; |
e79a6c83 | 2150 | |
b8d3daeb JS |
2151 | for (j = i; j < N_UMAPS; j += n_revalidators) { |
2152 | elements += cmap_count(&udpif->ukeys[j].cmap); | |
2153 | } | |
2154 | ds_put_format(&ds, "\t%u: (keys %d)\n", revalidator->id, elements); | |
e79a6c83 | 2155 | } |
e22d52ee EJ |
2156 | } |
2157 | ||
2158 | unixctl_command_reply(conn, ds_cstr(&ds)); | |
2159 | ds_destroy(&ds); | |
2160 | } | |
e79a6c83 EJ |
2161 | |
2162 | /* Disable using the megaflows. | |
2163 | * | |
2164 | * This command is only needed for advanced debugging, so it's not | |
2165 | * documented in the man page. */ | |
2166 | static void | |
2167 | upcall_unixctl_disable_megaflows(struct unixctl_conn *conn, | |
2168 | int argc OVS_UNUSED, | |
2169 | const char *argv[] OVS_UNUSED, | |
2170 | void *aux OVS_UNUSED) | |
2171 | { | |
b482e960 | 2172 | atomic_store_relaxed(&enable_megaflows, false); |
1b5b5071 | 2173 | udpif_flush_all_datapaths(); |
e79a6c83 EJ |
2174 | unixctl_command_reply(conn, "megaflows disabled"); |
2175 | } | |
2176 | ||
2177 | /* Re-enable using megaflows. | |
2178 | * | |
2179 | * This command is only needed for advanced debugging, so it's not | |
2180 | * documented in the man page. */ | |
2181 | static void | |
2182 | upcall_unixctl_enable_megaflows(struct unixctl_conn *conn, | |
2183 | int argc OVS_UNUSED, | |
2184 | const char *argv[] OVS_UNUSED, | |
2185 | void *aux OVS_UNUSED) | |
2186 | { | |
b482e960 | 2187 | atomic_store_relaxed(&enable_megaflows, true); |
1b5b5071 | 2188 | udpif_flush_all_datapaths(); |
e79a6c83 EJ |
2189 | unixctl_command_reply(conn, "megaflows enabled"); |
2190 | } | |
94b8c324 | 2191 | |
64bb477f JS |
2192 | /* Disable skipping flow attributes during flow dump. |
2193 | * | |
2194 | * This command is only needed for advanced debugging, so it's not | |
2195 | * documented in the man page. */ | |
2196 | static void | |
2197 | upcall_unixctl_disable_ufid(struct unixctl_conn *conn, int argc OVS_UNUSED, | |
2198 | const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) | |
2199 | { | |
70f07728 | 2200 | atomic_store_relaxed(&enable_ufid, false); |
64bb477f JS |
2201 | unixctl_command_reply(conn, "Datapath dumping tersely using UFID disabled"); |
2202 | } | |
2203 | ||
2204 | /* Re-enable skipping flow attributes during flow dump. | |
2205 | * | |
2206 | * This command is only needed for advanced debugging, so it's not documented | |
2207 | * in the man page. */ | |
2208 | static void | |
2209 | upcall_unixctl_enable_ufid(struct unixctl_conn *conn, int argc OVS_UNUSED, | |
2210 | const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) | |
2211 | { | |
70f07728 JS |
2212 | atomic_store_relaxed(&enable_ufid, true); |
2213 | unixctl_command_reply(conn, "Datapath dumping tersely using UFID enabled " | |
2214 | "for supported datapaths"); | |
64bb477f JS |
2215 | } |
2216 | ||
94b8c324 JS |
2217 | /* Set the flow limit. |
2218 | * | |
2219 | * This command is only needed for advanced debugging, so it's not | |
2220 | * documented in the man page. */ | |
2221 | static void | |
2222 | upcall_unixctl_set_flow_limit(struct unixctl_conn *conn, | |
2223 | int argc OVS_UNUSED, | |
2224 | const char *argv[] OVS_UNUSED, | |
2225 | void *aux OVS_UNUSED) | |
2226 | { | |
2227 | struct ds ds = DS_EMPTY_INITIALIZER; | |
2228 | struct udpif *udpif; | |
2229 | unsigned int flow_limit = atoi(argv[1]); | |
2230 | ||
2231 | LIST_FOR_EACH (udpif, list_node, &all_udpifs) { | |
b482e960 | 2232 | atomic_store_relaxed(&udpif->flow_limit, flow_limit); |
94b8c324 JS |
2233 | } |
2234 | ds_put_format(&ds, "set flow_limit to %u\n", flow_limit); | |
2235 | unixctl_command_reply(conn, ds_cstr(&ds)); | |
2236 | ds_destroy(&ds); | |
2237 | } | |
27f57736 JS |
2238 | |
2239 | static void | |
2240 | upcall_unixctl_dump_wait(struct unixctl_conn *conn, | |
2241 | int argc OVS_UNUSED, | |
2242 | const char *argv[] OVS_UNUSED, | |
2243 | void *aux OVS_UNUSED) | |
2244 | { | |
2245 | if (list_is_singleton(&all_udpifs)) { | |
d72eff6c | 2246 | struct udpif *udpif = NULL; |
27f57736 JS |
2247 | size_t len; |
2248 | ||
2249 | udpif = OBJECT_CONTAINING(list_front(&all_udpifs), udpif, list_node); | |
2250 | len = (udpif->n_conns + 1) * sizeof *udpif->conns; | |
2251 | udpif->conn_seq = seq_read(udpif->dump_seq); | |
2252 | udpif->conns = xrealloc(udpif->conns, len); | |
2253 | udpif->conns[udpif->n_conns++] = conn; | |
2254 | } else { | |
2255 | unixctl_command_reply_error(conn, "can't wait on multiple udpifs."); | |
2256 | } | |
2257 | } | |
98bb4286 JS |
2258 | |
2259 | static void | |
2260 | upcall_unixctl_purge(struct unixctl_conn *conn, int argc OVS_UNUSED, | |
2261 | const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) | |
2262 | { | |
2263 | struct udpif *udpif; | |
2264 | ||
2265 | LIST_FOR_EACH (udpif, list_node, &all_udpifs) { | |
2266 | int n; | |
2267 | ||
2268 | for (n = 0; n < udpif->n_revalidators; n++) { | |
2269 | revalidator_purge(&udpif->revalidators[n]); | |
2270 | } | |
2271 | } | |
2272 | unixctl_command_reply(conn, ""); | |
2273 | } |