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49a73e0c | 1 | /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 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(). */ | |
1520ef4f | 173 | struct ofpbuf odp_actions; /* Datapath actions from xlate_actions(). */ |
49a73e0c | 174 | struct flow_wildcards wc; /* Dependencies that megaflow must match. */ |
2338727d | 175 | struct ofpbuf put_actions; /* Actions 'put' in the fastpath. */ |
cc377352 | 176 | |
dcc2c6cd JR |
177 | struct dpif_ipfix *ipfix; /* IPFIX pointer or NULL. */ |
178 | struct dpif_sflow *sflow; /* SFlow pointer or NULL. */ | |
a0bab870 | 179 | |
cc377352 EJ |
180 | bool vsp_adjusted; /* 'packet' and 'flow' were adjusted for |
181 | VLAN splinters if true. */ | |
10e57640 | 182 | |
23597df0 JS |
183 | struct udpif_key *ukey; /* Revalidator flow cache. */ |
184 | bool ukey_persists; /* Set true to keep 'ukey' beyond the | |
185 | lifetime of this upcall. */ | |
186 | ||
187 | uint64_t dump_seq; /* udpif->dump_seq at translation time. */ | |
188 | uint64_t reval_seq; /* udpif->reval_seq at translation time. */ | |
189 | ||
cc377352 EJ |
190 | /* Not used by the upcall callback interface. */ |
191 | const struct nlattr *key; /* Datapath flow key. */ | |
192 | size_t key_len; /* Datapath flow key length. */ | |
8b7ea2d4 | 193 | const struct nlattr *out_tun_key; /* Datapath output tunnel key. */ |
1520ef4f BP |
194 | |
195 | uint64_t odp_actions_stub[1024 / 8]; /* Stub for odp_actions. */ | |
10e57640 EJ |
196 | }; |
197 | ||
e79a6c83 EJ |
198 | /* 'udpif_key's are responsible for tracking the little bit of state udpif |
199 | * needs to do flow expiration which can't be pulled directly from the | |
23597df0 JS |
200 | * datapath. They may be created by any handler or revalidator thread at any |
201 | * time, and read by any revalidator during the dump phase. They are however | |
202 | * each owned by a single revalidator which takes care of destroying them | |
203 | * during the garbage-collection phase. | |
7d170098 | 204 | * |
b8d3daeb JS |
205 | * The mutex within the ukey protects some members of the ukey. The ukey |
206 | * itself is protected by RCU and is held within a umap in the parent udpif. | |
207 | * Adding or removing a ukey from a umap is only safe when holding the | |
208 | * corresponding umap lock. */ | |
e79a6c83 | 209 | struct udpif_key { |
9fce0584 | 210 | struct cmap_node cmap_node; /* In parent revalidator 'ukeys' map. */ |
e79a6c83 | 211 | |
7d170098 EJ |
212 | /* These elements are read only once created, and therefore aren't |
213 | * protected by a mutex. */ | |
214 | const struct nlattr *key; /* Datapath flow key. */ | |
e79a6c83 | 215 | size_t key_len; /* Length of 'key'. */ |
bc2df54d JS |
216 | const struct nlattr *mask; /* Datapath flow mask. */ |
217 | size_t mask_len; /* Length of 'mask'. */ | |
218 | struct ofpbuf *actions; /* Datapath flow actions as nlattrs. */ | |
7af12bd7 | 219 | ovs_u128 ufid; /* Unique flow identifier. */ |
70e5ed6f | 220 | bool ufid_present; /* True if 'ufid' is in datapath. */ |
9fce0584 | 221 | uint32_t hash; /* Pre-computed hash for 'key'. */ |
bd5131ba | 222 | unsigned pmd_id; /* Datapath poll mode driver id. */ |
e79a6c83 | 223 | |
7d170098 EJ |
224 | struct ovs_mutex mutex; /* Guards the following. */ |
225 | struct dpif_flow_stats stats OVS_GUARDED; /* Last known stats.*/ | |
226 | long long int created OVS_GUARDED; /* Estimate of creation time. */ | |
efa08531 | 227 | uint64_t dump_seq OVS_GUARDED; /* Tracks udpif->dump_seq. */ |
23597df0 | 228 | uint64_t reval_seq OVS_GUARDED; /* Tracks udpif->reval_seq. */ |
7d170098 EJ |
229 | bool flow_exists OVS_GUARDED; /* Ensures flows are only deleted |
230 | once. */ | |
231 | ||
232 | struct xlate_cache *xcache OVS_GUARDED; /* Cache for xlate entries that | |
233 | * are affected by this ukey. | |
234 | * Used for stats and learning.*/ | |
02334943 | 235 | union { |
bc2df54d JS |
236 | struct odputil_keybuf buf; |
237 | struct nlattr nla; | |
238 | } keybuf, maskbuf; | |
e672ff9b JR |
239 | |
240 | /* Recirculation IDs with references held by the ukey. */ | |
241 | unsigned n_recircs; | |
242 | uint32_t recircs[]; /* 'n_recircs' id's for which references are held. */ | |
e79a6c83 EJ |
243 | }; |
244 | ||
6dad4d44 JS |
245 | /* Datapath operation with optional ukey attached. */ |
246 | struct ukey_op { | |
247 | struct udpif_key *ukey; | |
248 | struct dpif_flow_stats stats; /* Stats for 'op'. */ | |
249 | struct dpif_op dop; /* Flow operation. */ | |
250 | }; | |
251 | ||
e1ec7dd4 | 252 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); |
55951e15 | 253 | static struct ovs_list all_udpifs = OVS_LIST_INITIALIZER(&all_udpifs); |
e1ec7dd4 | 254 | |
cc377352 EJ |
255 | static size_t recv_upcalls(struct handler *); |
256 | static int process_upcall(struct udpif *, struct upcall *, | |
49a73e0c | 257 | struct ofpbuf *odp_actions, struct flow_wildcards *); |
6b31e073 | 258 | static void handle_upcalls(struct udpif *, struct upcall *, size_t n_upcalls); |
1f867548 AW |
259 | static void udpif_stop_threads(struct udpif *); |
260 | static void udpif_start_threads(struct udpif *, size_t n_handlers, | |
261 | size_t n_revalidators); | |
10e57640 | 262 | static void *udpif_upcall_handler(void *); |
e79a6c83 | 263 | static void *udpif_revalidator(void *); |
0e2a9f6f | 264 | static unsigned long udpif_get_n_flows(struct udpif *); |
7d170098 | 265 | static void revalidate(struct revalidator *); |
e79a6c83 | 266 | static void revalidator_sweep(struct revalidator *); |
e96a5c24 | 267 | static void revalidator_purge(struct revalidator *); |
e22d52ee EJ |
268 | static void upcall_unixctl_show(struct unixctl_conn *conn, int argc, |
269 | const char *argv[], void *aux); | |
e79a6c83 EJ |
270 | static void upcall_unixctl_disable_megaflows(struct unixctl_conn *, int argc, |
271 | const char *argv[], void *aux); | |
272 | static void upcall_unixctl_enable_megaflows(struct unixctl_conn *, int argc, | |
273 | const char *argv[], void *aux); | |
64bb477f JS |
274 | static void upcall_unixctl_disable_ufid(struct unixctl_conn *, int argc, |
275 | const char *argv[], void *aux); | |
276 | static void upcall_unixctl_enable_ufid(struct unixctl_conn *, int argc, | |
277 | const char *argv[], void *aux); | |
94b8c324 JS |
278 | static void upcall_unixctl_set_flow_limit(struct unixctl_conn *conn, int argc, |
279 | const char *argv[], void *aux); | |
27f57736 JS |
280 | static void upcall_unixctl_dump_wait(struct unixctl_conn *conn, int argc, |
281 | const char *argv[], void *aux); | |
98bb4286 JS |
282 | static void upcall_unixctl_purge(struct unixctl_conn *conn, int argc, |
283 | const char *argv[], void *aux); | |
7d170098 | 284 | |
49a73e0c BP |
285 | static struct udpif_key *ukey_create_from_upcall(struct upcall *, |
286 | struct flow_wildcards *); | |
64bb477f JS |
287 | static int ukey_create_from_dpif_flow(const struct udpif *, |
288 | const struct dpif_flow *, | |
289 | struct udpif_key **); | |
23597df0 JS |
290 | static bool ukey_install_start(struct udpif *, struct udpif_key *ukey); |
291 | static bool ukey_install_finish(struct udpif_key *ukey, int error); | |
292 | static bool ukey_install(struct udpif *udpif, struct udpif_key *ukey); | |
7af12bd7 JS |
293 | static struct udpif_key *ukey_lookup(struct udpif *udpif, |
294 | const ovs_u128 *ufid); | |
23597df0 | 295 | static int ukey_acquire(struct udpif *, const struct dpif_flow *, |
64bb477f | 296 | struct udpif_key **result, int *error); |
9fce0584 | 297 | static void ukey_delete__(struct udpif_key *); |
b8d3daeb | 298 | static void ukey_delete(struct umap *, struct udpif_key *); |
cc377352 EJ |
299 | static enum upcall_type classify_upcall(enum dpif_upcall_type type, |
300 | const struct nlattr *userdata); | |
301 | ||
cc377352 | 302 | static int upcall_receive(struct upcall *, const struct dpif_backer *, |
cf62fa4c | 303 | const struct dp_packet *packet, enum dpif_upcall_type, |
7af12bd7 | 304 | const struct nlattr *userdata, const struct flow *, |
bd5131ba | 305 | const ovs_u128 *ufid, const unsigned pmd_id); |
cc377352 | 306 | static void upcall_uninit(struct upcall *); |
e79a6c83 | 307 | |
623540e4 EJ |
308 | static upcall_callback upcall_cb; |
309 | ||
e79a6c83 | 310 | static atomic_bool enable_megaflows = ATOMIC_VAR_INIT(true); |
70f07728 | 311 | static atomic_bool enable_ufid = ATOMIC_VAR_INIT(true); |
e1ec7dd4 | 312 | |
0fc1f5c0 HH |
313 | void |
314 | udpif_init(void) | |
e1ec7dd4 | 315 | { |
e22d52ee | 316 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; |
e22d52ee EJ |
317 | if (ovsthread_once_start(&once)) { |
318 | unixctl_command_register("upcall/show", "", 0, 0, upcall_unixctl_show, | |
319 | NULL); | |
e79a6c83 EJ |
320 | unixctl_command_register("upcall/disable-megaflows", "", 0, 0, |
321 | upcall_unixctl_disable_megaflows, NULL); | |
322 | unixctl_command_register("upcall/enable-megaflows", "", 0, 0, | |
323 | upcall_unixctl_enable_megaflows, NULL); | |
64bb477f JS |
324 | unixctl_command_register("upcall/disable-ufid", "", 0, 0, |
325 | upcall_unixctl_disable_ufid, NULL); | |
326 | unixctl_command_register("upcall/enable-ufid", "", 0, 0, | |
327 | upcall_unixctl_enable_ufid, NULL); | |
94b8c324 JS |
328 | unixctl_command_register("upcall/set-flow-limit", "", 1, 1, |
329 | upcall_unixctl_set_flow_limit, NULL); | |
27f57736 JS |
330 | unixctl_command_register("revalidator/wait", "", 0, 0, |
331 | upcall_unixctl_dump_wait, NULL); | |
98bb4286 JS |
332 | unixctl_command_register("revalidator/purge", "", 0, 0, |
333 | upcall_unixctl_purge, NULL); | |
e22d52ee EJ |
334 | ovsthread_once_done(&once); |
335 | } | |
0fc1f5c0 HH |
336 | } |
337 | ||
338 | struct udpif * | |
339 | udpif_create(struct dpif_backer *backer, struct dpif *dpif) | |
340 | { | |
341 | struct udpif *udpif = xzalloc(sizeof *udpif); | |
e22d52ee | 342 | |
e1ec7dd4 EJ |
343 | udpif->dpif = dpif; |
344 | udpif->backer = backer; | |
e79a6c83 | 345 | atomic_init(&udpif->flow_limit, MIN(ofproto_flow_limit, 10000)); |
d7285d74 | 346 | udpif->reval_seq = seq_create(); |
e79a6c83 | 347 | udpif->dump_seq = seq_create(); |
e1ec7dd4 | 348 | latch_init(&udpif->exit_latch); |
e22d52ee | 349 | list_push_back(&all_udpifs, &udpif->list_node); |
64bb477f | 350 | atomic_init(&udpif->enable_ufid, false); |
64ca9472 JS |
351 | atomic_init(&udpif->n_flows, 0); |
352 | atomic_init(&udpif->n_flows_timestamp, LLONG_MIN); | |
353 | ovs_mutex_init(&udpif->n_flows_mutex); | |
b8d3daeb JS |
354 | udpif->ukeys = xmalloc(N_UMAPS * sizeof *udpif->ukeys); |
355 | for (int i = 0; i < N_UMAPS; i++) { | |
356 | cmap_init(&udpif->ukeys[i].cmap); | |
357 | ovs_mutex_init(&udpif->ukeys[i].mutex); | |
358 | } | |
e1ec7dd4 | 359 | |
623540e4 | 360 | dpif_register_upcall_cb(dpif, upcall_cb, udpif); |
6b31e073 | 361 | |
e1ec7dd4 EJ |
362 | return udpif; |
363 | } | |
364 | ||
27f57736 JS |
365 | void |
366 | udpif_run(struct udpif *udpif) | |
367 | { | |
368 | if (udpif->conns && udpif->conn_seq != seq_read(udpif->dump_seq)) { | |
369 | int i; | |
370 | ||
371 | for (i = 0; i < udpif->n_conns; i++) { | |
372 | unixctl_command_reply(udpif->conns[i], NULL); | |
373 | } | |
374 | free(udpif->conns); | |
375 | udpif->conns = NULL; | |
376 | udpif->n_conns = 0; | |
377 | } | |
378 | } | |
379 | ||
e1ec7dd4 EJ |
380 | void |
381 | udpif_destroy(struct udpif *udpif) | |
382 | { | |
1f867548 | 383 | udpif_stop_threads(udpif); |
e1ec7dd4 | 384 | |
b8d3daeb JS |
385 | for (int i = 0; i < N_UMAPS; i++) { |
386 | cmap_destroy(&udpif->ukeys[i].cmap); | |
387 | ovs_mutex_destroy(&udpif->ukeys[i].mutex); | |
388 | } | |
389 | free(udpif->ukeys); | |
390 | udpif->ukeys = NULL; | |
391 | ||
e22d52ee | 392 | list_remove(&udpif->list_node); |
e1ec7dd4 | 393 | latch_destroy(&udpif->exit_latch); |
d7285d74 | 394 | seq_destroy(udpif->reval_seq); |
e79a6c83 | 395 | seq_destroy(udpif->dump_seq); |
64ca9472 | 396 | ovs_mutex_destroy(&udpif->n_flows_mutex); |
e1ec7dd4 EJ |
397 | free(udpif); |
398 | } | |
399 | ||
1f867548 AW |
400 | /* Stops the handler and revalidator threads, must be enclosed in |
401 | * ovsrcu quiescent state unless when destroying udpif. */ | |
402 | static void | |
403 | udpif_stop_threads(struct udpif *udpif) | |
e1ec7dd4 | 404 | { |
3aadc5bb | 405 | if (udpif && (udpif->n_handlers != 0 || udpif->n_revalidators != 0)) { |
e1ec7dd4 EJ |
406 | size_t i; |
407 | ||
408 | latch_set(&udpif->exit_latch); | |
409 | ||
e1ec7dd4 EJ |
410 | for (i = 0; i < udpif->n_handlers; i++) { |
411 | struct handler *handler = &udpif->handlers[i]; | |
412 | ||
e79a6c83 EJ |
413 | xpthread_join(handler->thread, NULL); |
414 | } | |
415 | ||
416 | for (i = 0; i < udpif->n_revalidators; i++) { | |
7d170098 | 417 | xpthread_join(udpif->revalidators[i].thread, NULL); |
e1ec7dd4 EJ |
418 | } |
419 | ||
6b31e073 RW |
420 | dpif_disable_upcall(udpif->dpif); |
421 | ||
e79a6c83 EJ |
422 | for (i = 0; i < udpif->n_revalidators; i++) { |
423 | struct revalidator *revalidator = &udpif->revalidators[i]; | |
e79a6c83 | 424 | |
e96a5c24 JS |
425 | /* Delete ukeys, and delete all flows from the datapath to prevent |
426 | * double-counting stats. */ | |
427 | revalidator_purge(revalidator); | |
e79a6c83 EJ |
428 | } |
429 | ||
e1ec7dd4 EJ |
430 | latch_poll(&udpif->exit_latch); |
431 | ||
d8043da7 | 432 | ovs_barrier_destroy(&udpif->reval_barrier); |
7d170098 | 433 | |
e79a6c83 EJ |
434 | free(udpif->revalidators); |
435 | udpif->revalidators = NULL; | |
436 | udpif->n_revalidators = 0; | |
437 | ||
e1ec7dd4 EJ |
438 | free(udpif->handlers); |
439 | udpif->handlers = NULL; | |
440 | udpif->n_handlers = 0; | |
441 | } | |
1f867548 | 442 | } |
e1ec7dd4 | 443 | |
1f867548 AW |
444 | /* Starts the handler and revalidator threads, must be enclosed in |
445 | * ovsrcu quiescent state. */ | |
446 | static void | |
447 | udpif_start_threads(struct udpif *udpif, size_t n_handlers, | |
448 | size_t n_revalidators) | |
449 | { | |
6f12bda3 | 450 | if (udpif && n_handlers && n_revalidators) { |
e1ec7dd4 | 451 | size_t i; |
8e1ffd75 | 452 | bool enable_ufid; |
e1ec7dd4 EJ |
453 | |
454 | udpif->n_handlers = n_handlers; | |
e79a6c83 EJ |
455 | udpif->n_revalidators = n_revalidators; |
456 | ||
e1ec7dd4 EJ |
457 | udpif->handlers = xzalloc(udpif->n_handlers * sizeof *udpif->handlers); |
458 | for (i = 0; i < udpif->n_handlers; i++) { | |
459 | struct handler *handler = &udpif->handlers[i]; | |
460 | ||
461 | handler->udpif = udpif; | |
9a159f74 | 462 | handler->handler_id = i; |
8ba0a522 BP |
463 | handler->thread = ovs_thread_create( |
464 | "handler", udpif_upcall_handler, handler); | |
e1ec7dd4 | 465 | } |
e1ec7dd4 | 466 | |
8e1ffd75 JS |
467 | enable_ufid = ofproto_dpif_get_enable_ufid(udpif->backer); |
468 | atomic_init(&udpif->enable_ufid, enable_ufid); | |
6b31e073 RW |
469 | dpif_enable_upcall(udpif->dpif); |
470 | ||
d8043da7 | 471 | ovs_barrier_init(&udpif->reval_barrier, udpif->n_revalidators); |
7d170098 | 472 | udpif->reval_exit = false; |
e79a6c83 EJ |
473 | udpif->revalidators = xzalloc(udpif->n_revalidators |
474 | * sizeof *udpif->revalidators); | |
475 | for (i = 0; i < udpif->n_revalidators; i++) { | |
476 | struct revalidator *revalidator = &udpif->revalidators[i]; | |
477 | ||
478 | revalidator->udpif = udpif; | |
8ba0a522 BP |
479 | revalidator->thread = ovs_thread_create( |
480 | "revalidator", udpif_revalidator, revalidator); | |
e79a6c83 | 481 | } |
e1ec7dd4 | 482 | } |
1f867548 | 483 | } |
0f2ea848 | 484 | |
1f867548 AW |
485 | /* Tells 'udpif' how many threads it should use to handle upcalls. |
486 | * 'n_handlers' and 'n_revalidators' can never be zero. 'udpif''s | |
487 | * datapath handle must have packet reception enabled before starting | |
488 | * threads. */ | |
489 | void | |
490 | udpif_set_threads(struct udpif *udpif, size_t n_handlers, | |
491 | size_t n_revalidators) | |
492 | { | |
3aadc5bb | 493 | ovs_assert(udpif); |
1f867548 AW |
494 | ovs_assert(n_handlers && n_revalidators); |
495 | ||
496 | ovsrcu_quiesce_start(); | |
3aadc5bb AW |
497 | if (udpif->n_handlers != n_handlers |
498 | || udpif->n_revalidators != n_revalidators) { | |
499 | udpif_stop_threads(udpif); | |
500 | } | |
1f867548 | 501 | |
3aadc5bb | 502 | if (!udpif->handlers && !udpif->revalidators) { |
380fffec AW |
503 | int error; |
504 | ||
505 | error = dpif_handlers_set(udpif->dpif, n_handlers); | |
506 | if (error) { | |
507 | VLOG_ERR("failed to configure handlers in dpif %s: %s", | |
508 | dpif_name(udpif->dpif), ovs_strerror(error)); | |
509 | return; | |
510 | } | |
511 | ||
3aadc5bb AW |
512 | udpif_start_threads(udpif, n_handlers, n_revalidators); |
513 | } | |
0f2ea848 | 514 | ovsrcu_quiesce_end(); |
e1ec7dd4 EJ |
515 | } |
516 | ||
3f142f59 BP |
517 | /* Waits for all ongoing upcall translations to complete. This ensures that |
518 | * there are no transient references to any removed ofprotos (or other | |
519 | * objects). In particular, this should be called after an ofproto is removed | |
520 | * (e.g. via xlate_remove_ofproto()) but before it is destroyed. */ | |
521 | void | |
522 | udpif_synchronize(struct udpif *udpif) | |
523 | { | |
524 | /* This is stronger than necessary. It would be sufficient to ensure | |
525 | * (somehow) that each handler and revalidator thread had passed through | |
526 | * its main loop once. */ | |
527 | size_t n_handlers = udpif->n_handlers; | |
528 | size_t n_revalidators = udpif->n_revalidators; | |
1f867548 AW |
529 | |
530 | ovsrcu_quiesce_start(); | |
531 | udpif_stop_threads(udpif); | |
532 | udpif_start_threads(udpif, n_handlers, n_revalidators); | |
533 | ovsrcu_quiesce_end(); | |
3f142f59 BP |
534 | } |
535 | ||
e1ec7dd4 EJ |
536 | /* Notifies 'udpif' that something changed which may render previous |
537 | * xlate_actions() results invalid. */ | |
538 | void | |
539 | udpif_revalidate(struct udpif *udpif) | |
540 | { | |
d7285d74 | 541 | seq_change(udpif->reval_seq); |
e79a6c83 | 542 | } |
05067881 | 543 | |
e79a6c83 EJ |
544 | /* Returns a seq which increments every time 'udpif' pulls stats from the |
545 | * datapath. Callers can use this to get a sense of when might be a good time | |
546 | * to do periodic work which relies on relatively up to date statistics. */ | |
547 | struct seq * | |
548 | udpif_dump_seq(struct udpif *udpif) | |
549 | { | |
550 | return udpif->dump_seq; | |
e1ec7dd4 EJ |
551 | } |
552 | ||
1c030aa5 EJ |
553 | void |
554 | udpif_get_memory_usage(struct udpif *udpif, struct simap *usage) | |
555 | { | |
556 | size_t i; | |
557 | ||
1c030aa5 | 558 | simap_increase(usage, "handlers", udpif->n_handlers); |
e79a6c83 EJ |
559 | |
560 | simap_increase(usage, "revalidators", udpif->n_revalidators); | |
b8d3daeb | 561 | for (i = 0; i < N_UMAPS; i++) { |
9fce0584 | 562 | simap_increase(usage, "udpif keys", cmap_count(&udpif->ukeys[i].cmap)); |
e79a6c83 | 563 | } |
1c030aa5 EJ |
564 | } |
565 | ||
1b5b5071 | 566 | /* Remove flows from a single datapath. */ |
e79a6c83 | 567 | void |
1b5b5071 AZ |
568 | udpif_flush(struct udpif *udpif) |
569 | { | |
570 | size_t n_handlers, n_revalidators; | |
571 | ||
572 | n_handlers = udpif->n_handlers; | |
573 | n_revalidators = udpif->n_revalidators; | |
574 | ||
1f867548 AW |
575 | ovsrcu_quiesce_start(); |
576 | ||
577 | udpif_stop_threads(udpif); | |
1b5b5071 | 578 | dpif_flow_flush(udpif->dpif); |
1f867548 AW |
579 | udpif_start_threads(udpif, n_handlers, n_revalidators); |
580 | ||
581 | ovsrcu_quiesce_end(); | |
1b5b5071 AZ |
582 | } |
583 | ||
584 | /* Removes all flows from all datapaths. */ | |
585 | static void | |
586 | udpif_flush_all_datapaths(void) | |
e79a6c83 EJ |
587 | { |
588 | struct udpif *udpif; | |
589 | ||
590 | LIST_FOR_EACH (udpif, list_node, &all_udpifs) { | |
1b5b5071 | 591 | udpif_flush(udpif); |
e79a6c83 EJ |
592 | } |
593 | } | |
1b5b5071 | 594 | |
70f07728 JS |
595 | static bool |
596 | udpif_use_ufid(struct udpif *udpif) | |
597 | { | |
598 | bool enable; | |
599 | ||
600 | atomic_read_relaxed(&enable_ufid, &enable); | |
601 | return enable && ofproto_dpif_get_enable_ufid(udpif->backer); | |
602 | } | |
603 | ||
e79a6c83 | 604 | \f |
0e2a9f6f | 605 | static unsigned long |
64ca9472 | 606 | udpif_get_n_flows(struct udpif *udpif) |
e1ec7dd4 | 607 | { |
64ca9472 | 608 | long long int time, now; |
0e2a9f6f | 609 | unsigned long flow_count; |
64ca9472 JS |
610 | |
611 | now = time_msec(); | |
b482e960 | 612 | atomic_read_relaxed(&udpif->n_flows_timestamp, &time); |
64ca9472 JS |
613 | if (time < now - 100 && !ovs_mutex_trylock(&udpif->n_flows_mutex)) { |
614 | struct dpif_dp_stats stats; | |
615 | ||
b482e960 | 616 | atomic_store_relaxed(&udpif->n_flows_timestamp, now); |
64ca9472 JS |
617 | dpif_get_dp_stats(udpif->dpif, &stats); |
618 | flow_count = stats.n_flows; | |
b482e960 | 619 | atomic_store_relaxed(&udpif->n_flows, flow_count); |
64ca9472 JS |
620 | ovs_mutex_unlock(&udpif->n_flows_mutex); |
621 | } else { | |
b482e960 | 622 | atomic_read_relaxed(&udpif->n_flows, &flow_count); |
64ca9472 JS |
623 | } |
624 | return flow_count; | |
e79a6c83 | 625 | } |
e1ec7dd4 | 626 | |
a0bab870 | 627 | /* The upcall handler thread tries to read a batch of UPCALL_MAX_BATCH |
9a159f74 AW |
628 | * upcalls from dpif, processes the batch and installs corresponding flows |
629 | * in dpif. */ | |
e1ec7dd4 | 630 | static void * |
10e57640 | 631 | udpif_upcall_handler(void *arg) |
e1ec7dd4 | 632 | { |
e1ec7dd4 | 633 | struct handler *handler = arg; |
9a159f74 | 634 | struct udpif *udpif = handler->udpif; |
e1ec7dd4 | 635 | |
61057e88 | 636 | while (!latch_is_set(&handler->udpif->exit_latch)) { |
23597df0 JS |
637 | if (recv_upcalls(handler)) { |
638 | poll_immediate_wake(); | |
639 | } else { | |
9a159f74 AW |
640 | dpif_recv_wait(udpif->dpif, handler->handler_id); |
641 | latch_wait(&udpif->exit_latch); | |
e1ec7dd4 | 642 | } |
23597df0 | 643 | poll_block(); |
e1ec7dd4 | 644 | } |
61057e88 BP |
645 | |
646 | return NULL; | |
e1ec7dd4 | 647 | } |
e79a6c83 | 648 | |
cc377352 EJ |
649 | static size_t |
650 | recv_upcalls(struct handler *handler) | |
651 | { | |
652 | struct udpif *udpif = handler->udpif; | |
653 | uint64_t recv_stubs[UPCALL_MAX_BATCH][512 / 8]; | |
654 | struct ofpbuf recv_bufs[UPCALL_MAX_BATCH]; | |
a6f4ad08 | 655 | struct dpif_upcall dupcalls[UPCALL_MAX_BATCH]; |
cc377352 | 656 | struct upcall upcalls[UPCALL_MAX_BATCH]; |
ff601a08 | 657 | struct flow flows[UPCALL_MAX_BATCH]; |
cc377352 EJ |
658 | size_t n_upcalls, i; |
659 | ||
660 | n_upcalls = 0; | |
661 | while (n_upcalls < UPCALL_MAX_BATCH) { | |
662 | struct ofpbuf *recv_buf = &recv_bufs[n_upcalls]; | |
a6f4ad08 | 663 | struct dpif_upcall *dupcall = &dupcalls[n_upcalls]; |
cc377352 | 664 | struct upcall *upcall = &upcalls[n_upcalls]; |
ff601a08 | 665 | struct flow *flow = &flows[n_upcalls]; |
cc377352 EJ |
666 | int error; |
667 | ||
7174c145 | 668 | ofpbuf_use_stub(recv_buf, recv_stubs[n_upcalls], |
cc377352 | 669 | sizeof recv_stubs[n_upcalls]); |
a6f4ad08 | 670 | if (dpif_recv(udpif->dpif, handler->handler_id, dupcall, recv_buf)) { |
cc377352 EJ |
671 | ofpbuf_uninit(recv_buf); |
672 | break; | |
673 | } | |
674 | ||
ff601a08 | 675 | if (odp_flow_key_to_flow(dupcall->key, dupcall->key_len, flow) |
cc377352 EJ |
676 | == ODP_FIT_ERROR) { |
677 | goto free_dupcall; | |
678 | } | |
679 | ||
a6f4ad08 | 680 | error = upcall_receive(upcall, udpif->backer, &dupcall->packet, |
7af12bd7 | 681 | dupcall->type, dupcall->userdata, flow, |
1c1e46ed | 682 | &dupcall->ufid, PMD_ID_NULL); |
cc377352 EJ |
683 | if (error) { |
684 | if (error == ENODEV) { | |
685 | /* Received packet on datapath port for which we couldn't | |
686 | * associate an ofproto. This can happen if a port is removed | |
687 | * while traffic is being received. Print a rate-limited | |
688 | * message in case it happens frequently. */ | |
a6f4ad08 | 689 | dpif_flow_put(udpif->dpif, DPIF_FP_CREATE, dupcall->key, |
70e5ed6f | 690 | dupcall->key_len, NULL, 0, NULL, 0, |
1c1e46ed | 691 | &dupcall->ufid, PMD_ID_NULL, NULL); |
cc377352 | 692 | VLOG_INFO_RL(&rl, "received packet on unassociated datapath " |
ff601a08 | 693 | "port %"PRIu32, flow->in_port.odp_port); |
cc377352 EJ |
694 | } |
695 | goto free_dupcall; | |
696 | } | |
697 | ||
a6f4ad08 AW |
698 | upcall->key = dupcall->key; |
699 | upcall->key_len = dupcall->key_len; | |
7af12bd7 | 700 | upcall->ufid = &dupcall->ufid; |
cc377352 | 701 | |
8b7ea2d4 | 702 | upcall->out_tun_key = dupcall->out_tun_key; |
0a1017cb | 703 | upcall->actions = dupcall->actions; |
8b7ea2d4 | 704 | |
ff601a08 | 705 | if (vsp_adjust_flow(upcall->ofproto, flow, &dupcall->packet)) { |
cc377352 EJ |
706 | upcall->vsp_adjusted = true; |
707 | } | |
708 | ||
cf62fa4c PS |
709 | pkt_metadata_from_flow(&dupcall->packet.md, flow); |
710 | flow_extract(&dupcall->packet, flow); | |
cc377352 | 711 | |
1520ef4f BP |
712 | error = process_upcall(udpif, upcall, |
713 | &upcall->odp_actions, &upcall->wc); | |
cc377352 EJ |
714 | if (error) { |
715 | goto cleanup; | |
716 | } | |
717 | ||
718 | n_upcalls++; | |
719 | continue; | |
720 | ||
721 | cleanup: | |
722 | upcall_uninit(upcall); | |
723 | free_dupcall: | |
cf62fa4c | 724 | dp_packet_uninit(&dupcall->packet); |
cc377352 EJ |
725 | ofpbuf_uninit(recv_buf); |
726 | } | |
727 | ||
728 | if (n_upcalls) { | |
729 | handle_upcalls(handler->udpif, upcalls, n_upcalls); | |
730 | for (i = 0; i < n_upcalls; i++) { | |
cf62fa4c | 731 | dp_packet_uninit(&dupcalls[i].packet); |
cc377352 EJ |
732 | ofpbuf_uninit(&recv_bufs[i]); |
733 | upcall_uninit(&upcalls[i]); | |
734 | } | |
735 | } | |
736 | ||
737 | return n_upcalls; | |
738 | } | |
739 | ||
e79a6c83 EJ |
740 | static void * |
741 | udpif_revalidator(void *arg) | |
e1ec7dd4 | 742 | { |
7d170098 | 743 | /* Used by all revalidators. */ |
e79a6c83 | 744 | struct revalidator *revalidator = arg; |
7d170098 EJ |
745 | struct udpif *udpif = revalidator->udpif; |
746 | bool leader = revalidator == &udpif->revalidators[0]; | |
747 | ||
748 | /* Used only by the leader. */ | |
749 | long long int start_time = 0; | |
750 | uint64_t last_reval_seq = 0; | |
7d170098 | 751 | size_t n_flows = 0; |
e1ec7dd4 | 752 | |
8ba0a522 | 753 | revalidator->id = ovsthread_id_self(); |
e79a6c83 | 754 | for (;;) { |
7d170098 EJ |
755 | if (leader) { |
756 | uint64_t reval_seq; | |
e79a6c83 | 757 | |
e672ff9b JR |
758 | recirc_run(); /* Recirculation cleanup. */ |
759 | ||
7d170098 | 760 | reval_seq = seq_read(udpif->reval_seq); |
7d170098 | 761 | last_reval_seq = reval_seq; |
e79a6c83 | 762 | |
7d170098 EJ |
763 | n_flows = udpif_get_n_flows(udpif); |
764 | udpif->max_n_flows = MAX(n_flows, udpif->max_n_flows); | |
765 | udpif->avg_n_flows = (udpif->avg_n_flows + n_flows) / 2; | |
766 | ||
767 | /* Only the leader checks the exit latch to prevent a race where | |
768 | * some threads think it's true and exit and others think it's | |
769 | * false and block indefinitely on the reval_barrier */ | |
770 | udpif->reval_exit = latch_is_set(&udpif->exit_latch); | |
771 | ||
772 | start_time = time_msec(); | |
773 | if (!udpif->reval_exit) { | |
64bb477f JS |
774 | bool terse_dump; |
775 | ||
70f07728 | 776 | terse_dump = udpif_use_ufid(udpif); |
64bb477f | 777 | udpif->dump = dpif_flow_dump_create(udpif->dpif, terse_dump); |
e79a6c83 EJ |
778 | } |
779 | } | |
780 | ||
7d170098 | 781 | /* Wait for the leader to start the flow dump. */ |
d8043da7 | 782 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
783 | if (udpif->reval_exit) { |
784 | break; | |
e79a6c83 | 785 | } |
7d170098 EJ |
786 | revalidate(revalidator); |
787 | ||
788 | /* Wait for all flows to have been dumped before we garbage collect. */ | |
d8043da7 | 789 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
790 | revalidator_sweep(revalidator); |
791 | ||
792 | /* Wait for all revalidators to finish garbage collection. */ | |
d8043da7 | 793 | ovs_barrier_block(&udpif->reval_barrier); |
7d170098 EJ |
794 | |
795 | if (leader) { | |
b482e960 | 796 | unsigned int flow_limit; |
7d170098 EJ |
797 | long long int duration; |
798 | ||
b482e960 JR |
799 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); |
800 | ||
ac64794a | 801 | dpif_flow_dump_destroy(udpif->dump); |
7d170098 EJ |
802 | seq_change(udpif->dump_seq); |
803 | ||
804 | duration = MAX(time_msec() - start_time, 1); | |
7d170098 EJ |
805 | udpif->dump_duration = duration; |
806 | if (duration > 2000) { | |
807 | flow_limit /= duration / 1000; | |
808 | } else if (duration > 1300) { | |
809 | flow_limit = flow_limit * 3 / 4; | |
810 | } else if (duration < 1000 && n_flows > 2000 | |
811 | && flow_limit < n_flows * 1000 / duration) { | |
812 | flow_limit += 1000; | |
813 | } | |
814 | flow_limit = MIN(ofproto_flow_limit, MAX(flow_limit, 1000)); | |
b482e960 | 815 | atomic_store_relaxed(&udpif->flow_limit, flow_limit); |
e79a6c83 | 816 | |
7d170098 EJ |
817 | if (duration > 2000) { |
818 | VLOG_INFO("Spent an unreasonably long %lldms dumping flows", | |
819 | duration); | |
820 | } | |
e79a6c83 | 821 | |
7d170098 EJ |
822 | poll_timer_wait_until(start_time + MIN(ofproto_max_idle, 500)); |
823 | seq_wait(udpif->reval_seq, last_reval_seq); | |
824 | latch_wait(&udpif->exit_latch); | |
825 | poll_block(); | |
e79a6c83 EJ |
826 | } |
827 | } | |
828 | ||
829 | return NULL; | |
830 | } | |
831 | \f | |
e1ec7dd4 | 832 | static enum upcall_type |
cc377352 | 833 | classify_upcall(enum dpif_upcall_type type, const struct nlattr *userdata) |
e1ec7dd4 | 834 | { |
e1ec7dd4 EJ |
835 | union user_action_cookie cookie; |
836 | size_t userdata_len; | |
837 | ||
838 | /* First look at the upcall type. */ | |
cc377352 | 839 | switch (type) { |
e1ec7dd4 EJ |
840 | case DPIF_UC_ACTION: |
841 | break; | |
842 | ||
843 | case DPIF_UC_MISS: | |
844 | return MISS_UPCALL; | |
845 | ||
846 | case DPIF_N_UC_TYPES: | |
847 | default: | |
cc377352 | 848 | VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, type); |
e1ec7dd4 EJ |
849 | return BAD_UPCALL; |
850 | } | |
851 | ||
852 | /* "action" upcalls need a closer look. */ | |
cc377352 | 853 | if (!userdata) { |
e1ec7dd4 EJ |
854 | VLOG_WARN_RL(&rl, "action upcall missing cookie"); |
855 | return BAD_UPCALL; | |
856 | } | |
cc377352 | 857 | userdata_len = nl_attr_get_size(userdata); |
e1ec7dd4 EJ |
858 | if (userdata_len < sizeof cookie.type |
859 | || userdata_len > sizeof cookie) { | |
34582733 | 860 | VLOG_WARN_RL(&rl, "action upcall cookie has unexpected size %"PRIuSIZE, |
e1ec7dd4 EJ |
861 | userdata_len); |
862 | return BAD_UPCALL; | |
863 | } | |
864 | memset(&cookie, 0, sizeof cookie); | |
cc377352 | 865 | memcpy(&cookie, nl_attr_get(userdata), userdata_len); |
f5790bf6 | 866 | if (userdata_len == MAX(8, sizeof cookie.sflow) |
e1ec7dd4 EJ |
867 | && cookie.type == USER_ACTION_COOKIE_SFLOW) { |
868 | return SFLOW_UPCALL; | |
f5790bf6 | 869 | } else if (userdata_len == MAX(8, sizeof cookie.slow_path) |
e1ec7dd4 EJ |
870 | && cookie.type == USER_ACTION_COOKIE_SLOW_PATH) { |
871 | return MISS_UPCALL; | |
f5790bf6 | 872 | } else if (userdata_len == MAX(8, sizeof cookie.flow_sample) |
e1ec7dd4 EJ |
873 | && cookie.type == USER_ACTION_COOKIE_FLOW_SAMPLE) { |
874 | return FLOW_SAMPLE_UPCALL; | |
f5790bf6 | 875 | } else if (userdata_len == MAX(8, sizeof cookie.ipfix) |
e1ec7dd4 EJ |
876 | && cookie.type == USER_ACTION_COOKIE_IPFIX) { |
877 | return IPFIX_UPCALL; | |
878 | } else { | |
879 | VLOG_WARN_RL(&rl, "invalid user cookie of type %"PRIu16 | |
34582733 | 880 | " and size %"PRIuSIZE, cookie.type, userdata_len); |
e1ec7dd4 EJ |
881 | return BAD_UPCALL; |
882 | } | |
883 | } | |
884 | ||
e79a6c83 EJ |
885 | /* Calculates slow path actions for 'xout'. 'buf' must statically be |
886 | * initialized with at least 128 bytes of space. */ | |
887 | static void | |
888 | compose_slow_path(struct udpif *udpif, struct xlate_out *xout, | |
cc377352 | 889 | const struct flow *flow, odp_port_t odp_in_port, |
9a159f74 | 890 | struct ofpbuf *buf) |
e79a6c83 EJ |
891 | { |
892 | union user_action_cookie cookie; | |
893 | odp_port_t port; | |
894 | uint32_t pid; | |
895 | ||
896 | cookie.type = USER_ACTION_COOKIE_SLOW_PATH; | |
897 | cookie.slow_path.unused = 0; | |
898 | cookie.slow_path.reason = xout->slow; | |
899 | ||
900 | port = xout->slow & (SLOW_CFM | SLOW_BFD | SLOW_LACP | SLOW_STP) | |
901 | ? ODPP_NONE | |
902 | : odp_in_port; | |
9a159f74 | 903 | pid = dpif_port_get_pid(udpif->dpif, port, flow_hash_5tuple(flow, 0)); |
7321bda3 NM |
904 | odp_put_userspace_action(pid, &cookie, sizeof cookie.slow_path, |
905 | ODPP_NONE, false, buf); | |
e79a6c83 EJ |
906 | } |
907 | ||
3d76b86c AW |
908 | /* If there is no error, the upcall must be destroyed with upcall_uninit() |
909 | * before quiescing, as the referred objects are guaranteed to exist only | |
910 | * until the calling thread quiesces. Otherwise, do not call upcall_uninit() | |
911 | * since the 'upcall->put_actions' remains uninitialized. */ | |
cc377352 EJ |
912 | static int |
913 | upcall_receive(struct upcall *upcall, const struct dpif_backer *backer, | |
cf62fa4c | 914 | const struct dp_packet *packet, enum dpif_upcall_type type, |
7af12bd7 | 915 | const struct nlattr *userdata, const struct flow *flow, |
bd5131ba | 916 | const ovs_u128 *ufid, const unsigned pmd_id) |
cc377352 EJ |
917 | { |
918 | int error; | |
919 | ||
5c476ea3 JR |
920 | error = xlate_lookup(backer, flow, &upcall->ofproto, &upcall->ipfix, |
921 | &upcall->sflow, NULL, &upcall->in_port); | |
cc377352 EJ |
922 | if (error) { |
923 | return error; | |
924 | } | |
925 | ||
e672ff9b JR |
926 | upcall->recirc = NULL; |
927 | upcall->have_recirc_ref = false; | |
cc377352 EJ |
928 | upcall->flow = flow; |
929 | upcall->packet = packet; | |
7af12bd7 | 930 | upcall->ufid = ufid; |
1c1e46ed | 931 | upcall->pmd_id = pmd_id; |
cc377352 EJ |
932 | upcall->type = type; |
933 | upcall->userdata = userdata; | |
1520ef4f BP |
934 | ofpbuf_use_stub(&upcall->odp_actions, upcall->odp_actions_stub, |
935 | sizeof upcall->odp_actions_stub); | |
cc377352 EJ |
936 | ofpbuf_init(&upcall->put_actions, 0); |
937 | ||
938 | upcall->xout_initialized = false; | |
939 | upcall->vsp_adjusted = false; | |
23597df0 | 940 | upcall->ukey_persists = false; |
cc377352 | 941 | |
23597df0 | 942 | upcall->ukey = NULL; |
cc377352 EJ |
943 | upcall->key = NULL; |
944 | upcall->key_len = 0; | |
945 | ||
8b7ea2d4 | 946 | upcall->out_tun_key = NULL; |
7321bda3 | 947 | upcall->actions = NULL; |
8b7ea2d4 | 948 | |
cc377352 EJ |
949 | return 0; |
950 | } | |
951 | ||
a0bab870 | 952 | static void |
cc377352 | 953 | upcall_xlate(struct udpif *udpif, struct upcall *upcall, |
49a73e0c | 954 | struct ofpbuf *odp_actions, struct flow_wildcards *wc) |
e1ec7dd4 | 955 | { |
cc377352 | 956 | struct dpif_flow_stats stats; |
691d39b2 | 957 | struct xlate_in xin; |
a0bab870 | 958 | |
cc377352 | 959 | stats.n_packets = 1; |
cf62fa4c | 960 | stats.n_bytes = dp_packet_size(upcall->packet); |
cc377352 EJ |
961 | stats.used = time_msec(); |
962 | stats.tcp_flags = ntohs(upcall->flow->tcp_flags); | |
a0bab870 | 963 | |
cc377352 | 964 | xlate_in_init(&xin, upcall->ofproto, upcall->flow, upcall->in_port, NULL, |
1520ef4f | 965 | stats.tcp_flags, upcall->packet, wc, odp_actions); |
a0bab870 | 966 | |
cc377352 EJ |
967 | if (upcall->type == DPIF_UC_MISS) { |
968 | xin.resubmit_stats = &stats; | |
e672ff9b JR |
969 | |
970 | if (xin.recirc) { | |
971 | /* We may install a datapath flow only if we get a reference to the | |
972 | * recirculation context (otherwise we could have recirculation | |
973 | * upcalls using recirculation ID for which no context can be | |
974 | * found). We may still execute the flow's actions even if we | |
975 | * don't install the flow. */ | |
976 | upcall->recirc = xin.recirc; | |
977 | upcall->have_recirc_ref = recirc_id_node_try_ref_rcu(xin.recirc); | |
978 | } | |
a0bab870 | 979 | } else { |
e672ff9b JR |
980 | /* For non-miss upcalls, we are either executing actions (one of which |
981 | * is an userspace action) for an upcall, in which case the stats have | |
982 | * already been taken care of, or there's a flow in the datapath which | |
983 | * this packet was accounted to. Presumably the revalidators will deal | |
a0bab870 | 984 | * with pushing its stats eventually. */ |
e1ec7dd4 EJ |
985 | } |
986 | ||
23597df0 JS |
987 | upcall->dump_seq = seq_read(udpif->dump_seq); |
988 | upcall->reval_seq = seq_read(udpif->reval_seq); | |
a0bab870 | 989 | xlate_actions(&xin, &upcall->xout); |
cc377352 EJ |
990 | upcall->xout_initialized = true; |
991 | ||
992 | /* Special case for fail-open mode. | |
993 | * | |
994 | * If we are in fail-open mode, but we are connected to a controller too, | |
995 | * then we should send the packet up to the controller in the hope that it | |
996 | * will try to set up a flow and thereby allow us to exit fail-open. | |
997 | * | |
998 | * See the top-level comment in fail-open.c for more information. | |
999 | * | |
1000 | * Copy packets before they are modified by execution. */ | |
1001 | if (upcall->xout.fail_open) { | |
cf62fa4c | 1002 | const struct dp_packet *packet = upcall->packet; |
cc377352 EJ |
1003 | struct ofproto_packet_in *pin; |
1004 | ||
1005 | pin = xmalloc(sizeof *pin); | |
cf62fa4c PS |
1006 | pin->up.packet = xmemdup(dp_packet_data(packet), dp_packet_size(packet)); |
1007 | pin->up.packet_len = dp_packet_size(packet); | |
cc377352 EJ |
1008 | pin->up.reason = OFPR_NO_MATCH; |
1009 | pin->up.table_id = 0; | |
1010 | pin->up.cookie = OVS_BE64_MAX; | |
50dcbd8e | 1011 | flow_get_metadata(upcall->flow, &pin->up.flow_metadata); |
cc377352 EJ |
1012 | pin->send_len = 0; /* Not used for flow table misses. */ |
1013 | pin->miss_type = OFPROTO_PACKET_IN_NO_MISS; | |
1014 | ofproto_dpif_send_packet_in(upcall->ofproto, pin); | |
1015 | } | |
1016 | ||
1017 | if (!upcall->xout.slow) { | |
1018 | ofpbuf_use_const(&upcall->put_actions, | |
1520ef4f | 1019 | odp_actions->data, odp_actions->size); |
cc377352 EJ |
1020 | } else { |
1021 | ofpbuf_init(&upcall->put_actions, 0); | |
1022 | compose_slow_path(udpif, &upcall->xout, upcall->flow, | |
1023 | upcall->flow->in_port.odp_port, | |
1024 | &upcall->put_actions); | |
1025 | } | |
23597df0 | 1026 | |
7cde8208 JR |
1027 | /* This function is also called for slow-pathed flows. As we are only |
1028 | * going to create new datapath flows for actual datapath misses, there is | |
1029 | * no point in creating a ukey otherwise. */ | |
1030 | if (upcall->type == DPIF_UC_MISS) { | |
49a73e0c | 1031 | upcall->ukey = ukey_create_from_upcall(upcall, wc); |
7cde8208 | 1032 | } |
e1ec7dd4 EJ |
1033 | } |
1034 | ||
3eed53e9 | 1035 | static void |
cc377352 | 1036 | upcall_uninit(struct upcall *upcall) |
6b31e073 | 1037 | { |
cc377352 EJ |
1038 | if (upcall) { |
1039 | if (upcall->xout_initialized) { | |
1040 | xlate_out_uninit(&upcall->xout); | |
1041 | } | |
1520ef4f | 1042 | ofpbuf_uninit(&upcall->odp_actions); |
cc377352 | 1043 | ofpbuf_uninit(&upcall->put_actions); |
e672ff9b JR |
1044 | if (upcall->ukey) { |
1045 | if (!upcall->ukey_persists) { | |
1046 | ukey_delete__(upcall->ukey); | |
1047 | } | |
1048 | } else if (upcall->have_recirc_ref) { | |
1049 | /* The reference was transferred to the ukey if one was created. */ | |
1050 | recirc_id_node_unref(upcall->recirc); | |
23597df0 | 1051 | } |
cc377352 | 1052 | } |
6b31e073 RW |
1053 | } |
1054 | ||
623540e4 | 1055 | static int |
cf62fa4c | 1056 | upcall_cb(const struct dp_packet *packet, const struct flow *flow, ovs_u128 *ufid, |
bd5131ba | 1057 | unsigned pmd_id, enum dpif_upcall_type type, |
1c1e46ed AW |
1058 | const struct nlattr *userdata, struct ofpbuf *actions, |
1059 | struct flow_wildcards *wc, struct ofpbuf *put_actions, void *aux) | |
6b31e073 | 1060 | { |
623540e4 EJ |
1061 | struct udpif *udpif = aux; |
1062 | unsigned int flow_limit; | |
1063 | struct upcall upcall; | |
1064 | bool megaflow; | |
1065 | int error; | |
6b31e073 | 1066 | |
b482e960 JR |
1067 | atomic_read_relaxed(&enable_megaflows, &megaflow); |
1068 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); | |
1069 | ||
623540e4 | 1070 | error = upcall_receive(&upcall, udpif->backer, packet, type, userdata, |
1c1e46ed | 1071 | flow, ufid, pmd_id); |
623540e4 | 1072 | if (error) { |
3d76b86c | 1073 | return error; |
6b31e073 | 1074 | } |
6b31e073 | 1075 | |
49a73e0c | 1076 | error = process_upcall(udpif, &upcall, actions, wc); |
623540e4 EJ |
1077 | if (error) { |
1078 | goto out; | |
1079 | } | |
cc377352 | 1080 | |
623540e4 | 1081 | if (upcall.xout.slow && put_actions) { |
6fd6ed71 PS |
1082 | ofpbuf_put(put_actions, upcall.put_actions.data, |
1083 | upcall.put_actions.size); | |
623540e4 | 1084 | } |
cc377352 | 1085 | |
49a73e0c BP |
1086 | if (OVS_UNLIKELY(!megaflow)) { |
1087 | flow_wildcards_init_for_packet(wc, flow); | |
623540e4 | 1088 | } |
9a159f74 | 1089 | |
623540e4 EJ |
1090 | if (udpif_get_n_flows(udpif) >= flow_limit) { |
1091 | error = ENOSPC; | |
23597df0 JS |
1092 | goto out; |
1093 | } | |
1094 | ||
e672ff9b JR |
1095 | /* Prevent miss flow installation if the key has recirculation ID but we |
1096 | * were not able to get a reference on it. */ | |
1097 | if (type == DPIF_UC_MISS && upcall.recirc && !upcall.have_recirc_ref) { | |
23597df0 | 1098 | error = ENOSPC; |
e672ff9b | 1099 | goto out; |
6b31e073 | 1100 | } |
623540e4 | 1101 | |
e672ff9b JR |
1102 | if (upcall.ukey && !ukey_install(udpif, upcall.ukey)) { |
1103 | error = ENOSPC; | |
1104 | } | |
623540e4 | 1105 | out: |
23597df0 JS |
1106 | if (!error) { |
1107 | upcall.ukey_persists = true; | |
1108 | } | |
623540e4 EJ |
1109 | upcall_uninit(&upcall); |
1110 | return error; | |
6b31e073 | 1111 | } |
10e57640 | 1112 | |
3eed53e9 | 1113 | static int |
cc377352 | 1114 | process_upcall(struct udpif *udpif, struct upcall *upcall, |
49a73e0c | 1115 | struct ofpbuf *odp_actions, struct flow_wildcards *wc) |
6b31e073 | 1116 | { |
cc377352 | 1117 | const struct nlattr *userdata = upcall->userdata; |
cf62fa4c | 1118 | const struct dp_packet *packet = upcall->packet; |
cc377352 | 1119 | const struct flow *flow = upcall->flow; |
04a19fb8 | 1120 | |
cc377352 EJ |
1121 | switch (classify_upcall(upcall->type, userdata)) { |
1122 | case MISS_UPCALL: | |
49a73e0c | 1123 | upcall_xlate(udpif, upcall, odp_actions, wc); |
cc377352 | 1124 | return 0; |
10e57640 | 1125 | |
6b31e073 | 1126 | case SFLOW_UPCALL: |
cc377352 | 1127 | if (upcall->sflow) { |
6b31e073 | 1128 | union user_action_cookie cookie; |
7321bda3 NM |
1129 | const struct nlattr *actions; |
1130 | int actions_len = 0; | |
1131 | struct dpif_sflow_actions sflow_actions; | |
1132 | memset(&sflow_actions, 0, sizeof sflow_actions); | |
6b31e073 | 1133 | memset(&cookie, 0, sizeof cookie); |
cc377352 | 1134 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.sflow); |
7321bda3 NM |
1135 | if (upcall->actions) { |
1136 | /* Actions were passed up from datapath. */ | |
1137 | actions = nl_attr_get(upcall->actions); | |
1138 | actions_len = nl_attr_get_size(upcall->actions); | |
1139 | if (actions && actions_len) { | |
1140 | dpif_sflow_read_actions(flow, actions, actions_len, | |
1141 | &sflow_actions); | |
1142 | } | |
1143 | } | |
1144 | if (actions_len == 0) { | |
1145 | /* Lookup actions in userspace cache. */ | |
1146 | struct udpif_key *ukey = ukey_lookup(udpif, upcall->ufid); | |
1147 | if (ukey) { | |
1148 | actions = ukey->actions->data; | |
1149 | actions_len = ukey->actions->size; | |
1150 | dpif_sflow_read_actions(flow, actions, actions_len, | |
1151 | &sflow_actions); | |
1152 | } | |
1153 | } | |
cc377352 | 1154 | dpif_sflow_received(upcall->sflow, packet, flow, |
7321bda3 NM |
1155 | flow->in_port.odp_port, &cookie, |
1156 | actions_len > 0 ? &sflow_actions : NULL); | |
6b31e073 RW |
1157 | } |
1158 | break; | |
cc377352 | 1159 | |
6b31e073 | 1160 | case IPFIX_UPCALL: |
cc377352 | 1161 | if (upcall->ipfix) { |
8b7ea2d4 WZ |
1162 | union user_action_cookie cookie; |
1163 | struct flow_tnl output_tunnel_key; | |
1164 | ||
1165 | memset(&cookie, 0, sizeof cookie); | |
1166 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.ipfix); | |
1167 | ||
1168 | if (upcall->out_tun_key) { | |
8b7ea2d4 WZ |
1169 | odp_tun_key_from_attr(upcall->out_tun_key, |
1170 | &output_tunnel_key); | |
1171 | } | |
1172 | dpif_ipfix_bridge_sample(upcall->ipfix, packet, flow, | |
1173 | flow->in_port.odp_port, | |
1174 | cookie.ipfix.output_odp_port, | |
1175 | upcall->out_tun_key ? | |
1176 | &output_tunnel_key : NULL); | |
6b31e073 RW |
1177 | } |
1178 | break; | |
cc377352 | 1179 | |
6b31e073 | 1180 | case FLOW_SAMPLE_UPCALL: |
cc377352 | 1181 | if (upcall->ipfix) { |
6b31e073 RW |
1182 | union user_action_cookie cookie; |
1183 | ||
1184 | memset(&cookie, 0, sizeof cookie); | |
cc377352 | 1185 | memcpy(&cookie, nl_attr_get(userdata), sizeof cookie.flow_sample); |
6b31e073 RW |
1186 | |
1187 | /* The flow reflects exactly the contents of the packet. | |
1188 | * Sample the packet using it. */ | |
cc377352 | 1189 | dpif_ipfix_flow_sample(upcall->ipfix, packet, flow, |
6b31e073 RW |
1190 | cookie.flow_sample.collector_set_id, |
1191 | cookie.flow_sample.probability, | |
1192 | cookie.flow_sample.obs_domain_id, | |
1193 | cookie.flow_sample.obs_point_id); | |
e1ec7dd4 | 1194 | } |
6b31e073 | 1195 | break; |
cc377352 | 1196 | |
6b31e073 RW |
1197 | case BAD_UPCALL: |
1198 | break; | |
6b31e073 | 1199 | } |
10e57640 | 1200 | |
cc377352 | 1201 | return EAGAIN; |
9a159f74 AW |
1202 | } |
1203 | ||
1204 | static void | |
6b31e073 | 1205 | handle_upcalls(struct udpif *udpif, struct upcall *upcalls, |
a0bab870 | 1206 | size_t n_upcalls) |
9a159f74 | 1207 | { |
a0bab870 | 1208 | struct dpif_op *opsp[UPCALL_MAX_BATCH * 2]; |
6dad4d44 | 1209 | struct ukey_op ops[UPCALL_MAX_BATCH * 2]; |
9a159f74 | 1210 | unsigned int flow_limit; |
23597df0 | 1211 | size_t n_ops, n_opsp, i; |
cc377352 | 1212 | bool may_put; |
b482e960 JR |
1213 | bool megaflow; |
1214 | ||
1215 | atomic_read_relaxed(&udpif->flow_limit, &flow_limit); | |
1216 | atomic_read_relaxed(&enable_megaflows, &megaflow); | |
9a159f74 | 1217 | |
9a159f74 AW |
1218 | may_put = udpif_get_n_flows(udpif) < flow_limit; |
1219 | ||
a0bab870 | 1220 | /* Handle the packets individually in order of arrival. |
04a19fb8 BP |
1221 | * |
1222 | * - For SLOW_CFM, SLOW_LACP, SLOW_STP, and SLOW_BFD, translation is what | |
1223 | * processes received packets for these protocols. | |
1224 | * | |
1225 | * - For SLOW_CONTROLLER, translation sends the packet to the OpenFlow | |
1226 | * controller. | |
1227 | * | |
1228 | * The loop fills 'ops' with an array of operations to execute in the | |
1229 | * datapath. */ | |
1230 | n_ops = 0; | |
9a159f74 AW |
1231 | for (i = 0; i < n_upcalls; i++) { |
1232 | struct upcall *upcall = &upcalls[i]; | |
cf62fa4c | 1233 | const struct dp_packet *packet = upcall->packet; |
6dad4d44 | 1234 | struct ukey_op *op; |
d02c42bf | 1235 | |
cc377352 EJ |
1236 | if (upcall->vsp_adjusted) { |
1237 | /* This packet was received on a VLAN splinter port. We added a | |
1238 | * VLAN to the packet to make the packet resemble the flow, but the | |
1239 | * actions were composed assuming that the packet contained no | |
1240 | * VLAN. So, we must remove the VLAN header from the packet before | |
1241 | * trying to execute the actions. */ | |
1520ef4f | 1242 | if (upcall->odp_actions.size) { |
cf62fa4c | 1243 | eth_pop_vlan(CONST_CAST(struct dp_packet *, upcall->packet)); |
d02c42bf AZ |
1244 | } |
1245 | ||
1246 | /* Remove the flow vlan tags inserted by vlan splinter logic | |
1247 | * to ensure megaflow masks generated match the data path flow. */ | |
cc377352 | 1248 | CONST_CAST(struct flow *, upcall->flow)->vlan_tci = 0; |
e79a6c83 | 1249 | } |
04a19fb8 | 1250 | |
73e141f9 BP |
1251 | /* Do not install a flow into the datapath if: |
1252 | * | |
1253 | * - The datapath already has too many flows. | |
1254 | * | |
73e141f9 | 1255 | * - We received this packet via some flow installed in the kernel |
e672ff9b JR |
1256 | * already. |
1257 | * | |
1258 | * - Upcall was a recirculation but we do not have a reference to | |
1259 | * to the recirculation ID. */ | |
1260 | if (may_put && upcall->type == DPIF_UC_MISS && | |
1261 | (!upcall->recirc || upcall->have_recirc_ref)) { | |
bc2df54d | 1262 | struct udpif_key *ukey = upcall->ukey; |
d02c42bf | 1263 | |
23597df0 | 1264 | upcall->ukey_persists = true; |
bc2df54d | 1265 | op = &ops[n_ops++]; |
7af12bd7 | 1266 | |
bc2df54d | 1267 | op->ukey = ukey; |
6dad4d44 JS |
1268 | op->dop.type = DPIF_OP_FLOW_PUT; |
1269 | op->dop.u.flow_put.flags = DPIF_FP_CREATE; | |
bc2df54d JS |
1270 | op->dop.u.flow_put.key = ukey->key; |
1271 | op->dop.u.flow_put.key_len = ukey->key_len; | |
1272 | op->dop.u.flow_put.mask = ukey->mask; | |
1273 | op->dop.u.flow_put.mask_len = ukey->mask_len; | |
70e5ed6f | 1274 | op->dop.u.flow_put.ufid = upcall->ufid; |
6dad4d44 | 1275 | op->dop.u.flow_put.stats = NULL; |
6fd6ed71 PS |
1276 | op->dop.u.flow_put.actions = ukey->actions->data; |
1277 | op->dop.u.flow_put.actions_len = ukey->actions->size; | |
e79a6c83 EJ |
1278 | } |
1279 | ||
1520ef4f | 1280 | if (upcall->odp_actions.size) { |
04a19fb8 | 1281 | op = &ops[n_ops++]; |
23597df0 | 1282 | op->ukey = NULL; |
6dad4d44 | 1283 | op->dop.type = DPIF_OP_EXECUTE; |
cf62fa4c | 1284 | op->dop.u.execute.packet = CONST_CAST(struct dp_packet *, packet); |
a0bab870 | 1285 | odp_key_to_pkt_metadata(upcall->key, upcall->key_len, |
cf62fa4c | 1286 | &op->dop.u.execute.packet->md); |
1520ef4f BP |
1287 | op->dop.u.execute.actions = upcall->odp_actions.data; |
1288 | op->dop.u.execute.actions_len = upcall->odp_actions.size; | |
6dad4d44 JS |
1289 | op->dop.u.execute.needs_help = (upcall->xout.slow & SLOW_ACTION) != 0; |
1290 | op->dop.u.execute.probe = false; | |
04a19fb8 | 1291 | } |
e1ec7dd4 | 1292 | } |
e1ec7dd4 | 1293 | |
23597df0 JS |
1294 | /* Execute batch. |
1295 | * | |
1296 | * We install ukeys before installing the flows, locking them for exclusive | |
1297 | * access by this thread for the period of installation. This ensures that | |
1298 | * other threads won't attempt to delete the flows as we are creating them. | |
1299 | */ | |
1300 | n_opsp = 0; | |
da546e07 | 1301 | for (i = 0; i < n_ops; i++) { |
23597df0 JS |
1302 | struct udpif_key *ukey = ops[i].ukey; |
1303 | ||
1304 | if (ukey) { | |
1305 | /* If we can't install the ukey, don't install the flow. */ | |
1306 | if (!ukey_install_start(udpif, ukey)) { | |
1307 | ukey_delete__(ukey); | |
1308 | ops[i].ukey = NULL; | |
1309 | continue; | |
1310 | } | |
1311 | } | |
1312 | opsp[n_opsp++] = &ops[i].dop; | |
1313 | } | |
1314 | dpif_operate(udpif->dpif, opsp, n_opsp); | |
1315 | for (i = 0; i < n_ops; i++) { | |
1316 | if (ops[i].ukey) { | |
1317 | ukey_install_finish(ops[i].ukey, ops[i].dop.error); | |
1318 | } | |
da546e07 | 1319 | } |
e79a6c83 EJ |
1320 | } |
1321 | ||
7af12bd7 JS |
1322 | static uint32_t |
1323 | get_ufid_hash(const ovs_u128 *ufid) | |
1324 | { | |
1325 | return ufid->u32[0]; | |
1326 | } | |
1327 | ||
e79a6c83 | 1328 | static struct udpif_key * |
7af12bd7 | 1329 | ukey_lookup(struct udpif *udpif, const ovs_u128 *ufid) |
e79a6c83 EJ |
1330 | { |
1331 | struct udpif_key *ukey; | |
7af12bd7 JS |
1332 | int idx = get_ufid_hash(ufid) % N_UMAPS; |
1333 | struct cmap *cmap = &udpif->ukeys[idx].cmap; | |
e79a6c83 | 1334 | |
7af12bd7 | 1335 | CMAP_FOR_EACH_WITH_HASH (ukey, cmap_node, get_ufid_hash(ufid), cmap) { |
bdd7ecf5 | 1336 | if (ovs_u128_equals(&ukey->ufid, ufid)) { |
e79a6c83 EJ |
1337 | return ukey; |
1338 | } | |
1339 | } | |
1340 | return NULL; | |
1341 | } | |
1342 | ||
13bb6ed0 | 1343 | static struct udpif_key * |
7af12bd7 | 1344 | ukey_create__(const struct nlattr *key, size_t key_len, |
bc2df54d | 1345 | const struct nlattr *mask, size_t mask_len, |
70e5ed6f | 1346 | bool ufid_present, const ovs_u128 *ufid, |
bd5131ba | 1347 | const unsigned pmd_id, const struct ofpbuf *actions, |
e672ff9b JR |
1348 | uint64_t dump_seq, uint64_t reval_seq, long long int used, |
1349 | const struct recirc_id_node *key_recirc, struct xlate_out *xout) | |
feca8bd7 | 1350 | OVS_NO_THREAD_SAFETY_ANALYSIS |
13bb6ed0 | 1351 | { |
e672ff9b JR |
1352 | unsigned n_recircs = (key_recirc ? 1 : 0) + (xout ? xout->n_recircs : 0); |
1353 | struct udpif_key *ukey = xmalloc(sizeof *ukey + | |
1354 | n_recircs * sizeof *ukey->recircs); | |
13bb6ed0 | 1355 | |
bc2df54d JS |
1356 | memcpy(&ukey->keybuf, key, key_len); |
1357 | ukey->key = &ukey->keybuf.nla; | |
1358 | ukey->key_len = key_len; | |
1359 | memcpy(&ukey->maskbuf, mask, mask_len); | |
1360 | ukey->mask = &ukey->maskbuf.nla; | |
1361 | ukey->mask_len = mask_len; | |
70e5ed6f | 1362 | ukey->ufid_present = ufid_present; |
7af12bd7 | 1363 | ukey->ufid = *ufid; |
1c1e46ed | 1364 | ukey->pmd_id = pmd_id; |
7af12bd7 | 1365 | ukey->hash = get_ufid_hash(&ukey->ufid); |
bc2df54d | 1366 | ukey->actions = ofpbuf_clone(actions); |
23597df0 JS |
1367 | |
1368 | ovs_mutex_init(&ukey->mutex); | |
1369 | ukey->dump_seq = dump_seq; | |
1370 | ukey->reval_seq = reval_seq; | |
1371 | ukey->flow_exists = false; | |
1372 | ukey->created = time_msec(); | |
13bb6ed0 | 1373 | memset(&ukey->stats, 0, sizeof ukey->stats); |
23597df0 | 1374 | ukey->stats.used = used; |
b256dc52 | 1375 | ukey->xcache = NULL; |
13bb6ed0 | 1376 | |
e672ff9b JR |
1377 | ukey->n_recircs = n_recircs; |
1378 | if (key_recirc) { | |
1379 | ukey->recircs[0] = key_recirc->id; | |
1380 | } | |
1381 | if (xout && xout->n_recircs) { | |
1382 | const uint32_t *act_recircs = xlate_out_get_recircs(xout); | |
1383 | ||
1384 | memcpy(ukey->recircs + (key_recirc ? 1 : 0), act_recircs, | |
1385 | xout->n_recircs * sizeof *ukey->recircs); | |
1386 | xlate_out_take_recircs(xout); | |
1387 | } | |
13bb6ed0 JS |
1388 | return ukey; |
1389 | } | |
1390 | ||
23597df0 | 1391 | static struct udpif_key * |
49a73e0c | 1392 | ukey_create_from_upcall(struct upcall *upcall, struct flow_wildcards *wc) |
23597df0 | 1393 | { |
bc2df54d JS |
1394 | struct odputil_keybuf keystub, maskstub; |
1395 | struct ofpbuf keybuf, maskbuf; | |
2494ccd7 | 1396 | bool megaflow; |
5262eea1 JG |
1397 | struct odp_flow_key_parms odp_parms = { |
1398 | .flow = upcall->flow, | |
49a73e0c | 1399 | .mask = &wc->masks, |
5262eea1 | 1400 | }; |
bc2df54d | 1401 | |
2494ccd7 | 1402 | odp_parms.support = ofproto_dpif_get_support(upcall->ofproto)->odp; |
bc2df54d JS |
1403 | if (upcall->key_len) { |
1404 | ofpbuf_use_const(&keybuf, upcall->key, upcall->key_len); | |
1405 | } else { | |
1406 | /* dpif-netdev doesn't provide a netlink-formatted flow key in the | |
1407 | * upcall, so convert the upcall's flow here. */ | |
1408 | ofpbuf_use_stack(&keybuf, &keystub, sizeof keystub); | |
5262eea1 | 1409 | odp_parms.odp_in_port = upcall->flow->in_port.odp_port; |
5262eea1 | 1410 | odp_flow_key_from_flow(&odp_parms, &keybuf); |
bc2df54d JS |
1411 | } |
1412 | ||
1413 | atomic_read_relaxed(&enable_megaflows, &megaflow); | |
bc2df54d JS |
1414 | ofpbuf_use_stack(&maskbuf, &maskstub, sizeof maskstub); |
1415 | if (megaflow) { | |
5262eea1 | 1416 | odp_parms.odp_in_port = ODPP_NONE; |
ec1f6f32 | 1417 | odp_parms.key_buf = &keybuf; |
bc2df54d | 1418 | |
5262eea1 | 1419 | odp_flow_key_from_mask(&odp_parms, &maskbuf); |
bc2df54d JS |
1420 | } |
1421 | ||
6fd6ed71 | 1422 | return ukey_create__(keybuf.data, keybuf.size, maskbuf.data, maskbuf.size, |
1c1e46ed AW |
1423 | true, upcall->ufid, upcall->pmd_id, |
1424 | &upcall->put_actions, upcall->dump_seq, | |
e672ff9b JR |
1425 | upcall->reval_seq, 0, |
1426 | upcall->have_recirc_ref ? upcall->recirc : NULL, | |
1427 | &upcall->xout); | |
23597df0 JS |
1428 | } |
1429 | ||
64bb477f | 1430 | static int |
23597df0 | 1431 | ukey_create_from_dpif_flow(const struct udpif *udpif, |
64bb477f JS |
1432 | const struct dpif_flow *flow, |
1433 | struct udpif_key **ukey) | |
23597df0 | 1434 | { |
64bb477f | 1435 | struct dpif_flow full_flow; |
bc2df54d | 1436 | struct ofpbuf actions; |
23597df0 | 1437 | uint64_t dump_seq, reval_seq; |
64bb477f | 1438 | uint64_t stub[DPIF_FLOW_BUFSIZE / 8]; |
e672ff9b JR |
1439 | const struct nlattr *a; |
1440 | unsigned int left; | |
64bb477f | 1441 | |
e672ff9b | 1442 | if (!flow->key_len || !flow->actions_len) { |
64bb477f JS |
1443 | struct ofpbuf buf; |
1444 | int err; | |
1445 | ||
e672ff9b JR |
1446 | /* If the key or actions were not provided by the datapath, fetch the |
1447 | * full flow. */ | |
64bb477f | 1448 | ofpbuf_use_stack(&buf, &stub, sizeof stub); |
1c1e46ed AW |
1449 | err = dpif_flow_get(udpif->dpif, NULL, 0, &flow->ufid, |
1450 | flow->pmd_id, &buf, &full_flow); | |
64bb477f JS |
1451 | if (err) { |
1452 | return err; | |
1453 | } | |
1454 | flow = &full_flow; | |
1455 | } | |
e672ff9b JR |
1456 | |
1457 | /* Check the flow actions for recirculation action. As recirculation | |
1458 | * relies on OVS userspace internal state, we need to delete all old | |
1459 | * datapath flows with recirculation upon OVS restart. */ | |
1460 | NL_ATTR_FOR_EACH_UNSAFE (a, left, flow->actions, flow->actions_len) { | |
1461 | if (nl_attr_type(a) == OVS_ACTION_ATTR_RECIRC) { | |
1462 | return EINVAL; | |
1463 | } | |
1464 | } | |
1465 | ||
23597df0 JS |
1466 | dump_seq = seq_read(udpif->dump_seq); |
1467 | reval_seq = seq_read(udpif->reval_seq); | |
bc2df54d | 1468 | ofpbuf_use_const(&actions, &flow->actions, flow->actions_len); |
64bb477f JS |
1469 | *ukey = ukey_create__(flow->key, flow->key_len, |
1470 | flow->mask, flow->mask_len, flow->ufid_present, | |
1c1e46ed | 1471 | &flow->ufid, flow->pmd_id, &actions, dump_seq, |
e672ff9b | 1472 | reval_seq, flow->stats.used, NULL, NULL); |
1c1e46ed | 1473 | |
64bb477f | 1474 | return 0; |
23597df0 JS |
1475 | } |
1476 | ||
1477 | /* Attempts to insert a ukey into the shared ukey maps. | |
1478 | * | |
1479 | * On success, returns true, installs the ukey and returns it in a locked | |
1480 | * state. Otherwise, returns false. */ | |
1481 | static bool | |
1482 | ukey_install_start(struct udpif *udpif, struct udpif_key *new_ukey) | |
1483 | OVS_TRY_LOCK(true, new_ukey->mutex) | |
1484 | { | |
1485 | struct umap *umap; | |
1486 | struct udpif_key *old_ukey; | |
1487 | uint32_t idx; | |
1488 | bool locked = false; | |
1489 | ||
1490 | idx = new_ukey->hash % N_UMAPS; | |
1491 | umap = &udpif->ukeys[idx]; | |
1492 | ovs_mutex_lock(&umap->mutex); | |
7af12bd7 | 1493 | old_ukey = ukey_lookup(udpif, &new_ukey->ufid); |
23597df0 JS |
1494 | if (old_ukey) { |
1495 | /* Uncommon case: A ukey is already installed with the same UFID. */ | |
1496 | if (old_ukey->key_len == new_ukey->key_len | |
1497 | && !memcmp(old_ukey->key, new_ukey->key, new_ukey->key_len)) { | |
1498 | COVERAGE_INC(handler_duplicate_upcall); | |
1499 | } else { | |
1500 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1501 | ||
70e5ed6f JS |
1502 | odp_format_ufid(&old_ukey->ufid, &ds); |
1503 | ds_put_cstr(&ds, " "); | |
23597df0 JS |
1504 | odp_flow_key_format(old_ukey->key, old_ukey->key_len, &ds); |
1505 | ds_put_cstr(&ds, "\n"); | |
70e5ed6f JS |
1506 | odp_format_ufid(&new_ukey->ufid, &ds); |
1507 | ds_put_cstr(&ds, " "); | |
23597df0 JS |
1508 | odp_flow_key_format(new_ukey->key, new_ukey->key_len, &ds); |
1509 | ||
1510 | VLOG_WARN_RL(&rl, "Conflicting ukey for flows:\n%s", ds_cstr(&ds)); | |
1511 | ds_destroy(&ds); | |
1512 | } | |
1513 | } else { | |
1514 | ovs_mutex_lock(&new_ukey->mutex); | |
1515 | cmap_insert(&umap->cmap, &new_ukey->cmap_node, new_ukey->hash); | |
1516 | locked = true; | |
1517 | } | |
1518 | ovs_mutex_unlock(&umap->mutex); | |
1519 | ||
1520 | return locked; | |
1521 | } | |
1522 | ||
1523 | static void | |
1524 | ukey_install_finish__(struct udpif_key *ukey) OVS_REQUIRES(ukey->mutex) | |
1525 | { | |
1526 | ukey->flow_exists = true; | |
1527 | } | |
1528 | ||
1529 | static bool | |
1530 | ukey_install_finish(struct udpif_key *ukey, int error) | |
1531 | OVS_RELEASES(ukey->mutex) | |
1532 | { | |
1533 | if (!error) { | |
1534 | ukey_install_finish__(ukey); | |
1535 | } | |
1536 | ovs_mutex_unlock(&ukey->mutex); | |
1537 | ||
1538 | return !error; | |
1539 | } | |
1540 | ||
1541 | static bool | |
1542 | ukey_install(struct udpif *udpif, struct udpif_key *ukey) | |
1543 | { | |
1544 | /* The usual way to keep 'ukey->flow_exists' in sync with the datapath is | |
1545 | * to call ukey_install_start(), install the corresponding datapath flow, | |
1546 | * then call ukey_install_finish(). The netdev interface using upcall_cb() | |
1547 | * doesn't provide a function to separately finish the flow installation, | |
1548 | * so we perform the operations together here. | |
1549 | * | |
1550 | * This is fine currently, as revalidator threads will only delete this | |
1551 | * ukey during revalidator_sweep() and only if the dump_seq is mismatched. | |
1552 | * It is unlikely for a revalidator thread to advance dump_seq and reach | |
1553 | * the next GC phase between ukey creation and flow installation. */ | |
1554 | return ukey_install_start(udpif, ukey) && ukey_install_finish(ukey, 0); | |
1555 | } | |
1556 | ||
1557 | /* Searches for a ukey in 'udpif->ukeys' that matches 'flow' and attempts to | |
1558 | * lock the ukey. If the ukey does not exist, create it. | |
7d170098 | 1559 | * |
64bb477f JS |
1560 | * Returns 0 on success, setting *result to the matching ukey and returning it |
1561 | * in a locked state. Otherwise, returns an errno and clears *result. EBUSY | |
1562 | * indicates that another thread is handling this flow. Other errors indicate | |
1563 | * an unexpected condition creating a new ukey. | |
1564 | * | |
1565 | * *error is an output parameter provided to appease the threadsafety analyser, | |
1566 | * and its value matches the return value. */ | |
23597df0 JS |
1567 | static int |
1568 | ukey_acquire(struct udpif *udpif, const struct dpif_flow *flow, | |
64bb477f JS |
1569 | struct udpif_key **result, int *error) |
1570 | OVS_TRY_LOCK(0, (*result)->mutex) | |
7d170098 | 1571 | { |
feca8bd7 | 1572 | struct udpif_key *ukey; |
64bb477f | 1573 | int retval; |
feca8bd7 | 1574 | |
7af12bd7 | 1575 | ukey = ukey_lookup(udpif, &flow->ufid); |
23597df0 | 1576 | if (ukey) { |
64bb477f | 1577 | retval = ovs_mutex_trylock(&ukey->mutex); |
23597df0 | 1578 | } else { |
23597df0 JS |
1579 | /* Usually we try to avoid installing flows from revalidator threads, |
1580 | * because locking on a umap may cause handler threads to block. | |
1581 | * However there are certain cases, like when ovs-vswitchd is | |
1582 | * restarted, where it is desirable to handle flows that exist in the | |
1583 | * datapath gracefully (ie, don't just clear the datapath). */ | |
64bb477f JS |
1584 | bool install; |
1585 | ||
1586 | retval = ukey_create_from_dpif_flow(udpif, flow, &ukey); | |
1587 | if (retval) { | |
1588 | goto done; | |
1589 | } | |
1590 | install = ukey_install_start(udpif, ukey); | |
1591 | if (install) { | |
23597df0 | 1592 | ukey_install_finish__(ukey); |
64bb477f | 1593 | retval = 0; |
23597df0 JS |
1594 | } else { |
1595 | ukey_delete__(ukey); | |
64bb477f | 1596 | retval = EBUSY; |
23597df0 | 1597 | } |
7d170098 | 1598 | } |
7d170098 | 1599 | |
64bb477f JS |
1600 | done: |
1601 | *error = retval; | |
1602 | if (retval) { | |
feca8bd7 | 1603 | *result = NULL; |
64bb477f JS |
1604 | } else { |
1605 | *result = ukey; | |
feca8bd7 | 1606 | } |
64bb477f | 1607 | return retval; |
7d170098 EJ |
1608 | } |
1609 | ||
e79a6c83 | 1610 | static void |
9fce0584 | 1611 | ukey_delete__(struct udpif_key *ukey) |
7d170098 | 1612 | OVS_NO_THREAD_SAFETY_ANALYSIS |
e79a6c83 | 1613 | { |
23597df0 | 1614 | if (ukey) { |
e672ff9b JR |
1615 | for (int i = 0; i < ukey->n_recircs; i++) { |
1616 | recirc_free_id(ukey->recircs[i]); | |
1617 | } | |
23597df0 | 1618 | xlate_cache_delete(ukey->xcache); |
bc2df54d | 1619 | ofpbuf_delete(ukey->actions); |
23597df0 JS |
1620 | ovs_mutex_destroy(&ukey->mutex); |
1621 | free(ukey); | |
1622 | } | |
e79a6c83 EJ |
1623 | } |
1624 | ||
9fce0584 | 1625 | static void |
b8d3daeb JS |
1626 | ukey_delete(struct umap *umap, struct udpif_key *ukey) |
1627 | OVS_REQUIRES(umap->mutex) | |
9fce0584 | 1628 | { |
b8d3daeb | 1629 | cmap_remove(&umap->cmap, &ukey->cmap_node, ukey->hash); |
9fce0584 JS |
1630 | ovsrcu_postpone(ukey_delete__, ukey); |
1631 | } | |
1632 | ||
698ffe36 | 1633 | static bool |
49fae772 JS |
1634 | should_revalidate(const struct udpif *udpif, uint64_t packets, |
1635 | long long int used) | |
698ffe36 JS |
1636 | { |
1637 | long long int metric, now, duration; | |
1638 | ||
49fae772 JS |
1639 | if (udpif->dump_duration < 200) { |
1640 | /* We are likely to handle full revalidation for the flows. */ | |
1641 | return true; | |
1642 | } | |
1643 | ||
698ffe36 JS |
1644 | /* Calculate the mean time between seeing these packets. If this |
1645 | * exceeds the threshold, then delete the flow rather than performing | |
1646 | * costly revalidation for flows that aren't being hit frequently. | |
1647 | * | |
1648 | * This is targeted at situations where the dump_duration is high (~1s), | |
1649 | * and revalidation is triggered by a call to udpif_revalidate(). In | |
1650 | * these situations, revalidation of all flows causes fluctuations in the | |
1651 | * flow_limit due to the interaction with the dump_duration and max_idle. | |
1652 | * This tends to result in deletion of low-throughput flows anyway, so | |
1653 | * skip the revalidation and just delete those flows. */ | |
1654 | packets = MAX(packets, 1); | |
1655 | now = MAX(used, time_msec()); | |
1656 | duration = now - used; | |
1657 | metric = duration / packets; | |
1658 | ||
49fae772 JS |
1659 | if (metric < 200) { |
1660 | /* The flow is receiving more than ~5pps, so keep it. */ | |
1661 | return true; | |
698ffe36 | 1662 | } |
49fae772 | 1663 | return false; |
698ffe36 JS |
1664 | } |
1665 | ||
e79a6c83 | 1666 | static bool |
7d170098 | 1667 | revalidate_ukey(struct udpif *udpif, struct udpif_key *ukey, |
bc2df54d | 1668 | const struct dpif_flow_stats *stats, uint64_t reval_seq) |
acaa8dac | 1669 | OVS_REQUIRES(ukey->mutex) |
e79a6c83 | 1670 | { |
1520ef4f BP |
1671 | uint64_t odp_actions_stub[1024 / 8]; |
1672 | struct ofpbuf odp_actions = OFPBUF_STUB_INITIALIZER(odp_actions_stub); | |
1673 | ||
e79a6c83 | 1674 | struct xlate_out xout, *xoutp; |
42f3baca | 1675 | struct netflow *netflow; |
e79a6c83 EJ |
1676 | struct ofproto_dpif *ofproto; |
1677 | struct dpif_flow_stats push; | |
7d170098 | 1678 | struct flow flow, dp_mask; |
49a73e0c | 1679 | struct flow_wildcards wc; |
d70e8c28 | 1680 | uint64_t *dp64, *xout64; |
cc377352 | 1681 | ofp_port_t ofp_in_port; |
e79a6c83 | 1682 | struct xlate_in xin; |
698ffe36 | 1683 | long long int last_used; |
e79a6c83 EJ |
1684 | int error; |
1685 | size_t i; | |
0725e747 | 1686 | bool ok; |
23597df0 | 1687 | bool need_revalidate; |
e79a6c83 EJ |
1688 | |
1689 | ok = false; | |
1690 | xoutp = NULL; | |
42f3baca | 1691 | netflow = NULL; |
e79a6c83 | 1692 | |
23597df0 | 1693 | need_revalidate = (ukey->reval_seq != reval_seq); |
698ffe36 | 1694 | last_used = ukey->stats.used; |
bc2df54d JS |
1695 | push.used = stats->used; |
1696 | push.tcp_flags = stats->tcp_flags; | |
1697 | push.n_packets = (stats->n_packets > ukey->stats.n_packets | |
1698 | ? stats->n_packets - ukey->stats.n_packets | |
ac64794a | 1699 | : 0); |
bc2df54d JS |
1700 | push.n_bytes = (stats->n_bytes > ukey->stats.n_bytes |
1701 | ? stats->n_bytes - ukey->stats.n_bytes | |
ac64794a | 1702 | : 0); |
e79a6c83 | 1703 | |
23597df0 | 1704 | if (need_revalidate && last_used |
49fae772 | 1705 | && !should_revalidate(udpif, push.n_packets, last_used)) { |
698ffe36 JS |
1706 | ok = false; |
1707 | goto exit; | |
1708 | } | |
1709 | ||
28c5588e | 1710 | /* We will push the stats, so update the ukey stats cache. */ |
bc2df54d | 1711 | ukey->stats = *stats; |
23597df0 | 1712 | if (!push.n_packets && !need_revalidate) { |
e79a6c83 EJ |
1713 | ok = true; |
1714 | goto exit; | |
1715 | } | |
1716 | ||
23597df0 | 1717 | if (ukey->xcache && !need_revalidate) { |
0725e747 | 1718 | xlate_push_stats(ukey->xcache, &push); |
df1a9a49 JS |
1719 | ok = true; |
1720 | goto exit; | |
b256dc52 JS |
1721 | } |
1722 | ||
cc377352 EJ |
1723 | if (odp_flow_key_to_flow(ukey->key, ukey->key_len, &flow) |
1724 | == ODP_FIT_ERROR) { | |
1725 | goto exit; | |
1726 | } | |
1727 | ||
5c476ea3 JR |
1728 | error = xlate_lookup(udpif->backer, &flow, &ofproto, NULL, NULL, &netflow, |
1729 | &ofp_in_port); | |
e79a6c83 EJ |
1730 | if (error) { |
1731 | goto exit; | |
1732 | } | |
1733 | ||
23597df0 | 1734 | if (need_revalidate) { |
df1a9a49 JS |
1735 | xlate_cache_clear(ukey->xcache); |
1736 | } | |
b256dc52 JS |
1737 | if (!ukey->xcache) { |
1738 | ukey->xcache = xlate_cache_new(); | |
1739 | } | |
1740 | ||
cc377352 | 1741 | xlate_in_init(&xin, ofproto, &flow, ofp_in_port, NULL, push.tcp_flags, |
1520ef4f | 1742 | NULL, need_revalidate ? &wc : NULL, &odp_actions); |
0725e747 BP |
1743 | if (push.n_packets) { |
1744 | xin.resubmit_stats = &push; | |
1745 | xin.may_learn = true; | |
1746 | } | |
b256dc52 | 1747 | xin.xcache = ukey->xcache; |
e79a6c83 EJ |
1748 | xlate_actions(&xin, &xout); |
1749 | xoutp = &xout; | |
ddeca9a4 | 1750 | |
23597df0 | 1751 | if (!need_revalidate) { |
e79a6c83 EJ |
1752 | ok = true; |
1753 | goto exit; | |
1754 | } | |
1755 | ||
1520ef4f BP |
1756 | if (xout.slow) { |
1757 | ofpbuf_clear(&odp_actions); | |
cc377352 | 1758 | compose_slow_path(udpif, &xout, &flow, flow.in_port.odp_port, |
1520ef4f | 1759 | &odp_actions); |
e79a6c83 EJ |
1760 | } |
1761 | ||
1520ef4f | 1762 | if (!ofpbuf_equal(&odp_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 | 1776 | dp64 = (uint64_t *) &dp_mask; |
49a73e0c | 1777 | xout64 = (uint64_t *) &wc.masks; |
d70e8c28 JR |
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 | 1793 | xlate_out_uninit(xoutp); |
1520ef4f | 1794 | ofpbuf_uninit(&odp_actions); |
e79a6c83 EJ |
1795 | return ok; |
1796 | } | |
1797 | ||
64bb477f | 1798 | static void |
8e1ffd75 JS |
1799 | delete_op_init__(struct udpif *udpif, struct ukey_op *op, |
1800 | const struct dpif_flow *flow) | |
64bb477f | 1801 | { |
4c438b67 | 1802 | op->ukey = NULL; |
64bb477f JS |
1803 | op->dop.type = DPIF_OP_FLOW_DEL; |
1804 | op->dop.u.flow_del.key = flow->key; | |
1805 | op->dop.u.flow_del.key_len = flow->key_len; | |
1806 | op->dop.u.flow_del.ufid = flow->ufid_present ? &flow->ufid : NULL; | |
1c1e46ed | 1807 | op->dop.u.flow_del.pmd_id = flow->pmd_id; |
64bb477f | 1808 | op->dop.u.flow_del.stats = &op->stats; |
70f07728 | 1809 | op->dop.u.flow_del.terse = udpif_use_ufid(udpif); |
64bb477f JS |
1810 | } |
1811 | ||
e79a6c83 | 1812 | static void |
8e1ffd75 | 1813 | delete_op_init(struct udpif *udpif, struct ukey_op *op, struct udpif_key *ukey) |
13bb6ed0 JS |
1814 | { |
1815 | op->ukey = ukey; | |
6dad4d44 | 1816 | op->dop.type = DPIF_OP_FLOW_DEL; |
bc2df54d JS |
1817 | op->dop.u.flow_del.key = ukey->key; |
1818 | op->dop.u.flow_del.key_len = ukey->key_len; | |
70e5ed6f | 1819 | op->dop.u.flow_del.ufid = ukey->ufid_present ? &ukey->ufid : NULL; |
1c1e46ed | 1820 | op->dop.u.flow_del.pmd_id = ukey->pmd_id; |
6dad4d44 | 1821 | op->dop.u.flow_del.stats = &op->stats; |
70f07728 | 1822 | op->dop.u.flow_del.terse = udpif_use_ufid(udpif); |
13bb6ed0 JS |
1823 | } |
1824 | ||
1825 | static void | |
6dad4d44 | 1826 | push_ukey_ops__(struct udpif *udpif, struct ukey_op *ops, size_t n_ops) |
e79a6c83 | 1827 | { |
13bb6ed0 JS |
1828 | struct dpif_op *opsp[REVALIDATE_MAX_BATCH]; |
1829 | size_t i; | |
e79a6c83 | 1830 | |
13bb6ed0 JS |
1831 | ovs_assert(n_ops <= REVALIDATE_MAX_BATCH); |
1832 | for (i = 0; i < n_ops; i++) { | |
6dad4d44 | 1833 | opsp[i] = &ops[i].dop; |
13bb6ed0 JS |
1834 | } |
1835 | dpif_operate(udpif->dpif, opsp, n_ops); | |
1836 | ||
1837 | for (i = 0; i < n_ops; i++) { | |
6dad4d44 | 1838 | struct ukey_op *op = &ops[i]; |
13bb6ed0 JS |
1839 | struct dpif_flow_stats *push, *stats, push_buf; |
1840 | ||
6dad4d44 | 1841 | stats = op->dop.u.flow_del.stats; |
5e73c322 JS |
1842 | push = &push_buf; |
1843 | ||
64bb477f JS |
1844 | if (op->ukey) { |
1845 | ovs_mutex_lock(&op->ukey->mutex); | |
1846 | push->used = MAX(stats->used, op->ukey->stats.used); | |
1847 | push->tcp_flags = stats->tcp_flags | op->ukey->stats.tcp_flags; | |
1848 | push->n_packets = stats->n_packets - op->ukey->stats.n_packets; | |
1849 | push->n_bytes = stats->n_bytes - op->ukey->stats.n_bytes; | |
1850 | ovs_mutex_unlock(&op->ukey->mutex); | |
1851 | } else { | |
1852 | push = stats; | |
1853 | } | |
13bb6ed0 JS |
1854 | |
1855 | if (push->n_packets || netflow_exists()) { | |
64bb477f JS |
1856 | const struct nlattr *key = op->dop.u.flow_del.key; |
1857 | size_t key_len = op->dop.u.flow_del.key_len; | |
13bb6ed0 JS |
1858 | struct ofproto_dpif *ofproto; |
1859 | struct netflow *netflow; | |
cc377352 | 1860 | ofp_port_t ofp_in_port; |
13bb6ed0 | 1861 | struct flow flow; |
5e73c322 | 1862 | int error; |
b256dc52 | 1863 | |
64bb477f JS |
1864 | if (op->ukey) { |
1865 | ovs_mutex_lock(&op->ukey->mutex); | |
1866 | if (op->ukey->xcache) { | |
1867 | xlate_push_stats(op->ukey->xcache, push); | |
1868 | ovs_mutex_unlock(&op->ukey->mutex); | |
1869 | continue; | |
1870 | } | |
7d170098 | 1871 | ovs_mutex_unlock(&op->ukey->mutex); |
64bb477f JS |
1872 | key = op->ukey->key; |
1873 | key_len = op->ukey->key_len; | |
b256dc52 | 1874 | } |
13bb6ed0 | 1875 | |
64bb477f | 1876 | if (odp_flow_key_to_flow(key, key_len, &flow) |
cc377352 EJ |
1877 | == ODP_FIT_ERROR) { |
1878 | continue; | |
1879 | } | |
1880 | ||
e672ff9b JR |
1881 | error = xlate_lookup(udpif->backer, &flow, &ofproto, NULL, NULL, |
1882 | &netflow, &ofp_in_port); | |
5e73c322 | 1883 | if (!error) { |
13bb6ed0 JS |
1884 | struct xlate_in xin; |
1885 | ||
cc377352 | 1886 | xlate_in_init(&xin, ofproto, &flow, ofp_in_port, NULL, |
1520ef4f | 1887 | push->tcp_flags, NULL, NULL, NULL); |
13bb6ed0 | 1888 | xin.resubmit_stats = push->n_packets ? push : NULL; |
0725e747 | 1889 | xin.may_learn = push->n_packets > 0; |
13bb6ed0 JS |
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 | } |