lib/dpctl.c

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include <arpa/inet.h>
  19 #include <errno.h>
  20 #include <inttypes.h>
  21 #include <sys/socket.h>
  22 #include <net/if.h>
  23 #include <netinet/in.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28
  29 #include "command-line.h"
  30 #include "compiler.h"
  31 #include "dirs.h"
  32 #include "dpctl.h"
  33 #include "dpif.h"
  34 #include "dynamic-string.h"
  35 #include "flow.h"
  36 #include "match.h"
  37 #include "netdev.h"
  38 #include "netdev-dpdk.h"
  39 #include "netlink.h"
  40 #include "odp-util.h"
  41 #include "ofp-parse.h"
  42 #include "ofpbuf.h"
  43 #include "ovs-numa.h"
  44 #include "packets.h"
  45 #include "shash.h"
  46 #include "simap.h"
  47 #include "smap.h"
  48 #include "sset.h"
  49 #include "timeval.h"
  50 #include "unixctl.h"
  51 #include "util.h"
  52
  53 typedef int dpctl_command_handler(int argc, const char *argv[],
  54                                   struct dpctl_params *);
  55 struct dpctl_command {
  56     const char *name;
  57     const char *usage;
  58     int min_args;
  59     int max_args;
  60     dpctl_command_handler *handler;
  61 };
  62 static const struct dpctl_command *get_all_dpctl_commands(void);
  63 static void dpctl_print(struct dpctl_params *dpctl_p, const char *fmt, ...)
  64     OVS_PRINTF_FORMAT(2, 3);
  65 static void dpctl_error(struct dpctl_params* dpctl_p, int err_no,
  66                         const char *fmt, ...)
  67     OVS_PRINTF_FORMAT(3, 4);
  68
  69 static void
  70 dpctl_puts(struct dpctl_params *dpctl_p, bool error, const char *string)
  71 {
  72     dpctl_p->output(dpctl_p->aux, error, string);
  73 }
  74
  75 static void
  76 dpctl_print(struct dpctl_params *dpctl_p, const char *fmt, ...)
  77 {
  78     char *string;
  79     va_list args;
  80
  81     va_start(args, fmt);
  82     string = xvasprintf(fmt, args);
  83     va_end(args);
  84
  85     dpctl_puts(dpctl_p, false, string);
  86     free(string);
  87 }
  88
  89 static void
  90 dpctl_error(struct dpctl_params* dpctl_p, int err_no, const char *fmt, ...)
  91 {
  92     const char *subprogram_name = get_subprogram_name();
  93     struct ds ds = DS_EMPTY_INITIALIZER;
  94     int save_errno = errno;
  95     va_list args;
  96
  97
  98     if (subprogram_name[0]) {
  99         ds_put_format(&ds, "%s(%s): ", program_name,subprogram_name);
 100     } else {
 101         ds_put_format(&ds, "%s: ", program_name);
 102     }
 103
 104     va_start(args, fmt);
 105     ds_put_format_valist(&ds, fmt, args);
 106     va_end(args);
 107
 108     if (err_no != 0) {
 109         ds_put_format(&ds, " (%s)", ovs_retval_to_string(err_no));
 110     }
 111     ds_put_cstr(&ds, "\n");
 112
 113     dpctl_puts(dpctl_p, true, ds_cstr(&ds));
 114
 115     ds_destroy(&ds);
 116
 117     errno = save_errno;
 118 }
 119 \f
 120 static int dpctl_add_if(int argc, const char *argv[], struct dpctl_params *);
 121
 122 static int
 123 if_up(struct netdev *netdev)
 124 {
 125     return netdev_turn_flags_on(netdev, NETDEV_UP, NULL);
 126 }
 127
 128 /* Retrieve the name of the datapath if exactly one exists.  The caller
 129  * is responsible for freeing the returned string.  If there is not one
 130  * datapath, aborts with an error message. */
 131 static char *
 132 get_one_dp(struct dpctl_params *dpctl_p)
 133 {
 134     struct sset types;
 135     const char *type;
 136     char *dp_name = NULL;
 137     size_t count = 0;
 138
 139     sset_init(&types);
 140     dp_enumerate_types(&types);
 141     SSET_FOR_EACH (type, &types) {
 142         struct sset names;
 143
 144         sset_init(&names);
 145         if (!dp_enumerate_names(type, &names)) {
 146             count += sset_count(&names);
 147             if (!dp_name && count == 1) {
 148                 dp_name = xasprintf("%s@%s", type, SSET_FIRST(&names));
 149             }
 150         }
 151         sset_destroy(&names);
 152     }
 153     sset_destroy(&types);
 154
 155     if (!count) {
 156         dpctl_error(dpctl_p, 0, "no datapaths exist");
 157     } else if (count > 1) {
 158         dpctl_error(dpctl_p, 0, "multiple datapaths, specify one");
 159         free(dp_name);
 160         dp_name = NULL;
 161     }
 162
 163     return dp_name;
 164 }
 165
 166 static int
 167 parsed_dpif_open(const char *arg_, bool create, struct dpif **dpifp)
 168 {
 169     int result;
 170     char *name, *type;
 171
 172     dp_parse_name(arg_, &name, &type);
 173
 174     if (create) {
 175         result = dpif_create(name, type, dpifp);
 176     } else {
 177         result = dpif_open(name, type, dpifp);
 178     }
 179
 180     free(name);
 181     free(type);
 182     return result;
 183 }
 184
 185 static int
 186 dpctl_add_dp(int argc, const char *argv[],
 187              struct dpctl_params *dpctl_p)
 188 {
 189     struct dpif *dpif;
 190     int error;
 191
 192     error = parsed_dpif_open(argv[1], true, &dpif);
 193     if (error) {
 194         dpctl_error(dpctl_p, error, "add_dp");
 195         return error;
 196     }
 197     dpif_close(dpif);
 198     if (argc > 2) {
 199         error = dpctl_add_if(argc, argv, dpctl_p);
 200     }
 201     return error;
 202 }
 203
 204 static int
 205 dpctl_del_dp(int argc OVS_UNUSED, const char *argv[],
 206              struct dpctl_params *dpctl_p)
 207 {
 208     struct dpif *dpif;
 209     int error;
 210
 211     error = parsed_dpif_open(argv[1], false, &dpif);
 212     if (error) {
 213         dpctl_error(dpctl_p, error, "opening datapath");
 214         return error;
 215     }
 216     error = dpif_delete(dpif);
 217     if (error) {
 218         dpctl_error(dpctl_p, error, "del_dp");
 219     }
 220
 221     dpif_close(dpif);
 222     return error;
 223 }
 224
 225 static int
 226 dpctl_add_if(int argc OVS_UNUSED, const char *argv[],
 227              struct dpctl_params *dpctl_p)
 228 {
 229     struct dpif *dpif;
 230     int i, error, lasterror = 0;
 231
 232     error = parsed_dpif_open(argv[1], false, &dpif);
 233     if (error) {
 234         dpctl_error(dpctl_p, error, "opening datapath");
 235         return error;
 236     }
 237     for (i = 2; i < argc; i++) {
 238         const char *name, *type;
 239         char *save_ptr = NULL, *argcopy;
 240         struct netdev *netdev = NULL;
 241         struct smap args;
 242         odp_port_t port_no = ODPP_NONE;
 243         char *option;
 244
 245         argcopy = xstrdup(argv[i]);
 246         name = strtok_r(argcopy, ",", &save_ptr);
 247         type = "system";
 248
 249         if (!name) {
 250             dpctl_error(dpctl_p, 0, "%s is not a valid network device name",
 251                         argv[i]);
 252             error = EINVAL;
 253             goto next;
 254         }
 255
 256         smap_init(&args);
 257         while ((option = strtok_r(NULL, ",", &save_ptr)) != NULL) {
 258             char *save_ptr_2 = NULL;
 259             char *key, *value;
 260
 261             key = strtok_r(option, "=", &save_ptr_2);
 262             value = strtok_r(NULL, "", &save_ptr_2);
 263             if (!value) {
 264                 value = "";
 265             }
 266
 267             if (!strcmp(key, "type")) {
 268                 type = value;
 269             } else if (!strcmp(key, "port_no")) {
 270                 port_no = u32_to_odp(atoi(value));
 271             } else if (!smap_add_once(&args, key, value)) {
 272                 dpctl_error(dpctl_p, 0, "duplicate \"%s\" option", key);
 273             }
 274         }
 275
 276         error = netdev_open(name, type, &netdev);
 277         if (error) {
 278             dpctl_error(dpctl_p, error, "%s: failed to open network device",
 279                         name);
 280             goto next_destroy_args;
 281         }
 282
 283         error = netdev_set_config(netdev, &args, NULL);
 284         if (error) {
 285             goto next_destroy_args;
 286         }
 287
 288         error = dpif_port_add(dpif, netdev, &port_no);
 289         if (error) {
 290             dpctl_error(dpctl_p, error, "adding %s to %s failed", name,
 291                         argv[1]);
 292             goto next_destroy_args;
 293         }
 294
 295         error = if_up(netdev);
 296         if (error) {
 297             dpctl_error(dpctl_p, error, "%s: failed bringing interface up",
 298                         name);
 299         }
 300
 301 next_destroy_args:
 302         netdev_close(netdev);
 303         smap_destroy(&args);
 304 next:
 305         free(argcopy);
 306         if (error) {
 307             lasterror = error;
 308         }
 309     }
 310     dpif_close(dpif);
 311
 312     return lasterror;
 313 }
 314
 315 static int
 316 dpctl_set_if(int argc, const char *argv[], struct dpctl_params *dpctl_p)
 317 {
 318     struct dpif *dpif;
 319     int i, error, lasterror = 0;
 320
 321     error = parsed_dpif_open(argv[1], false, &dpif);
 322     if (error) {
 323         dpctl_error(dpctl_p, error, "opening datapath");
 324         return error;
 325     }
 326     for (i = 2; i < argc; i++) {
 327         struct netdev *netdev = NULL;
 328         struct dpif_port dpif_port;
 329         char *save_ptr = NULL;
 330         char *type = NULL;
 331         char *argcopy;
 332         const char *name;
 333         struct smap args;
 334         odp_port_t port_no;
 335         char *option;
 336         int error = 0;
 337
 338         argcopy = xstrdup(argv[i]);
 339         name = strtok_r(argcopy, ",", &save_ptr);
 340         if (!name) {
 341             dpctl_error(dpctl_p, 0, "%s is not a valid network device name",
 342                         argv[i]);
 343             goto next;
 344         }
 345
 346         /* Get the port's type from the datapath. */
 347         error = dpif_port_query_by_name(dpif, name, &dpif_port);
 348         if (error) {
 349             dpctl_error(dpctl_p, error, "%s: failed to query port in %s", name,
 350                         argv[1]);
 351             goto next;
 352         }
 353         type = xstrdup(dpif_port.type);
 354         port_no = dpif_port.port_no;
 355         dpif_port_destroy(&dpif_port);
 356
 357         /* Retrieve its existing configuration. */
 358         error = netdev_open(name, type, &netdev);
 359         if (error) {
 360             dpctl_error(dpctl_p, error, "%s: failed to open network device",
 361                         name);
 362             goto next;
 363         }
 364
 365         smap_init(&args);
 366         error = netdev_get_config(netdev, &args);
 367         if (error) {
 368             dpctl_error(dpctl_p, error, "%s: failed to fetch configuration",
 369                         name);
 370             goto next_destroy_args;
 371         }
 372
 373         /* Parse changes to configuration. */
 374         while ((option = strtok_r(NULL, ",", &save_ptr)) != NULL) {
 375             char *save_ptr_2 = NULL;
 376             char *key, *value;
 377
 378             key = strtok_r(option, "=", &save_ptr_2);
 379             value = strtok_r(NULL, "", &save_ptr_2);
 380             if (!value) {
 381                 value = "";
 382             }
 383
 384             if (!strcmp(key, "type")) {
 385                 if (strcmp(value, type)) {
 386                     dpctl_error(dpctl_p, 0,
 387                                 "%s: can't change type from %s to %s",
 388                                  name, type, value);
 389                     error = EINVAL;
 390                     goto next_destroy_args;
 391                 }
 392             } else if (!strcmp(key, "port_no")) {
 393                 if (port_no != u32_to_odp(atoi(value))) {
 394                     dpctl_error(dpctl_p, 0, "%s: can't change port number from"
 395                               " %"PRIu32" to %d", name, port_no, atoi(value));
 396                     error = EINVAL;
 397                     goto next_destroy_args;
 398                 }
 399             } else if (value[0] == '\0') {
 400                 smap_remove(&args, key);
 401             } else {
 402                 smap_replace(&args, key, value);
 403             }
 404         }
 405
 406         /* Update configuration. */
 407         char *err_s = NULL;
 408         error = netdev_set_config(netdev, &args, &err_s);
 409         if (err_s || error) {
 410             dpctl_error(dpctl_p, error, "%s",
 411                         err_s ? err_s : "Error updating configuration");
 412             free(err_s);
 413         }
 414         if (error) {
 415             goto next_destroy_args;
 416         }
 417
 418 next_destroy_args:
 419         smap_destroy(&args);
 420 next:
 421         netdev_close(netdev);
 422         free(type);
 423         free(argcopy);
 424         if (error) {
 425             lasterror = error;
 426         }
 427     }
 428     dpif_close(dpif);
 429
 430     return lasterror;
 431 }
 432
 433 static bool
 434 get_port_number(struct dpif *dpif, const char *name, odp_port_t *port,
 435                 struct dpctl_params *dpctl_p)
 436 {
 437     struct dpif_port dpif_port;
 438
 439     if (!dpif_port_query_by_name(dpif, name, &dpif_port)) {
 440         *port = dpif_port.port_no;
 441         dpif_port_destroy(&dpif_port);
 442         return true;
 443     } else {
 444         dpctl_error(dpctl_p, 0, "no port named %s", name);
 445         return false;
 446     }
 447 }
 448
 449 static int
 450 dpctl_del_if(int argc, const char *argv[], struct dpctl_params *dpctl_p)
 451 {
 452     struct dpif *dpif;
 453     int i, error, lasterror = 0;
 454
 455     error = parsed_dpif_open(argv[1], false, &dpif);
 456     if (error) {
 457         dpctl_error(dpctl_p, error, "opening datapath");
 458         return error;
 459     }
 460     for (i = 2; i < argc; i++) {
 461         const char *name = argv[i];
 462         odp_port_t port;
 463
 464         if (!name[strspn(name, "0123456789")]) {
 465             port = u32_to_odp(atoi(name));
 466         } else if (!get_port_number(dpif, name, &port, dpctl_p)) {
 467             lasterror = ENOENT;
 468             continue;
 469         }
 470
 471         error = dpif_port_del(dpif, port);
 472         if (error) {
 473             dpctl_error(dpctl_p, error, "deleting port %s from %s failed",
 474                         name, argv[1]);
 475             lasterror = error;
 476         }
 477     }
 478     dpif_close(dpif);
 479     return lasterror;
 480 }
 481
 482 static void
 483 print_stat(struct dpctl_params *dpctl_p, const char *leader, uint64_t value)
 484 {
 485     dpctl_print(dpctl_p, "%s", leader);
 486     if (value != UINT64_MAX) {
 487         dpctl_print(dpctl_p, "%"PRIu64, value);
 488     } else {
 489         dpctl_print(dpctl_p, "?");
 490     }
 491 }
 492
 493 static void
 494 print_human_size(struct dpctl_params *dpctl_p, uint64_t value)
 495 {
 496     if (value == UINT64_MAX) {
 497         /* Nothing to do. */
 498     } else if (value >= 1024ULL * 1024 * 1024 * 1024) {
 499         dpctl_print(dpctl_p, " (%.1f TiB)",
 500                     value / (1024.0 * 1024 * 1024 * 1024));
 501     } else if (value >= 1024ULL * 1024 * 1024) {
 502         dpctl_print(dpctl_p, " (%.1f GiB)", value / (1024.0 * 1024 * 1024));
 503     } else if (value >= 1024ULL * 1024) {
 504         dpctl_print(dpctl_p, " (%.1f MiB)", value / (1024.0 * 1024));
 505     } else if (value >= 1024) {
 506         dpctl_print(dpctl_p, " (%.1f KiB)", value / 1024.0);
 507     }
 508 }
 509
 510 static void
 511 show_dpif(struct dpif *dpif, struct dpctl_params *dpctl_p)
 512 {
 513     struct dpif_port_dump dump;
 514     struct dpif_port dpif_port;
 515     struct dpif_dp_stats stats;
 516     struct netdev *netdev;
 517
 518     dpctl_print(dpctl_p, "%s:\n", dpif_name(dpif));
 519     if (!dpif_get_dp_stats(dpif, &stats)) {
 520         dpctl_print(dpctl_p, "\tlookups: hit:%"PRIu64" missed:%"PRIu64
 521                              " lost:%"PRIu64"\n\tflows: %"PRIu64"\n",
 522                     stats.n_hit, stats.n_missed, stats.n_lost, stats.n_flows);
 523         if (stats.n_masks != UINT32_MAX) {
 524             uint64_t n_pkts = stats.n_hit + stats.n_missed;
 525             double avg = n_pkts ? (double) stats.n_mask_hit / n_pkts : 0.0;
 526
 527             dpctl_print(dpctl_p, "\tmasks: hit:%"PRIu64" total:%"PRIu32
 528                                  " hit/pkt:%.2f\n",
 529                         stats.n_mask_hit, stats.n_masks, avg);
 530         }
 531     }
 532
 533     DPIF_PORT_FOR_EACH (&dpif_port, &dump, dpif) {
 534         dpctl_print(dpctl_p, "\tport %u: %s",
 535                     dpif_port.port_no, dpif_port.name);
 536
 537         if (strcmp(dpif_port.type, "system")) {
 538             int error;
 539
 540             dpctl_print(dpctl_p, " (%s", dpif_port.type);
 541
 542             error = netdev_open(dpif_port.name, dpif_port.type, &netdev);
 543             if (!error) {
 544                 struct smap config;
 545
 546                 smap_init(&config);
 547                 error = netdev_get_config(netdev, &config);
 548                 if (!error) {
 549                     const struct smap_node **nodes;
 550                     size_t i;
 551
 552                     nodes = smap_sort(&config);
 553                     for (i = 0; i < smap_count(&config); i++) {
 554                         const struct smap_node *node = nodes[i];
 555                         dpctl_print(dpctl_p, "%c %s=%s", i ? ',' : ':',
 556                                     node->key, node->value);
 557                     }
 558                     free(nodes);
 559                 } else {
 560                     dpctl_print(dpctl_p, ", could not retrieve configuration "
 561                                          "(%s)",  ovs_strerror(error));
 562                 }
 563                 smap_destroy(&config);
 564
 565                 netdev_close(netdev);
 566             } else {
 567                 dpctl_print(dpctl_p, ": open failed (%s)",
 568                             ovs_strerror(error));
 569             }
 570             dpctl_print(dpctl_p, ")");
 571         }
 572         dpctl_print(dpctl_p, "\n");
 573
 574         if (dpctl_p->print_statistics) {
 575             struct netdev_stats s;
 576             int error;
 577
 578             error = netdev_open(dpif_port.name, dpif_port.type, &netdev);
 579             if (error) {
 580                 dpctl_print(dpctl_p, ", open failed (%s)",
 581                             ovs_strerror(error));
 582                 continue;
 583             }
 584             error = netdev_get_stats(netdev, &s);
 585             if (!error) {
 586                 netdev_close(netdev);
 587                 print_stat(dpctl_p, "\t\tRX packets:", s.rx_packets);
 588                 print_stat(dpctl_p, " errors:", s.rx_errors);
 589                 print_stat(dpctl_p, " dropped:", s.rx_dropped);
 590                 print_stat(dpctl_p, " overruns:", s.rx_over_errors);
 591                 print_stat(dpctl_p, " frame:", s.rx_frame_errors);
 592                 dpctl_print(dpctl_p, "\n");
 593
 594                 print_stat(dpctl_p, "\t\tTX packets:", s.tx_packets);
 595                 print_stat(dpctl_p, " errors:", s.tx_errors);
 596                 print_stat(dpctl_p, " dropped:", s.tx_dropped);
 597                 print_stat(dpctl_p, " aborted:", s.tx_aborted_errors);
 598                 print_stat(dpctl_p, " carrier:", s.tx_carrier_errors);
 599                 dpctl_print(dpctl_p, "\n");
 600
 601                 print_stat(dpctl_p, "\t\tcollisions:", s.collisions);
 602                 dpctl_print(dpctl_p, "\n");
 603
 604                 print_stat(dpctl_p, "\t\tRX bytes:", s.rx_bytes);
 605                 print_human_size(dpctl_p, s.rx_bytes);
 606                 print_stat(dpctl_p, "  TX bytes:", s.tx_bytes);
 607                 print_human_size(dpctl_p, s.tx_bytes);
 608                 dpctl_print(dpctl_p, "\n");
 609             } else {
 610                 dpctl_print(dpctl_p, ", could not retrieve stats (%s)",
 611                             ovs_strerror(error));
 612             }
 613         }
 614     }
 615 }
 616
 617 typedef void (*dps_for_each_cb)(struct dpif *, struct dpctl_params *);
 618
 619 static int
 620 dps_for_each(struct dpctl_params *dpctl_p, dps_for_each_cb cb)
 621 {
 622     struct sset dpif_names = SSET_INITIALIZER(&dpif_names),
 623                 dpif_types = SSET_INITIALIZER(&dpif_types);
 624     int error, openerror = 0, enumerror = 0;
 625     const char *type, *name;
 626     bool at_least_one = false;
 627
 628     dp_enumerate_types(&dpif_types);
 629
 630     SSET_FOR_EACH (type, &dpif_types) {
 631         error = dp_enumerate_names(type, &dpif_names);
 632         if (error) {
 633             enumerror = error;
 634         }
 635
 636         SSET_FOR_EACH (name, &dpif_names) {
 637             struct dpif *dpif;
 638
 639             at_least_one = true;
 640             error = dpif_open(name, type, &dpif);
 641             if (!error) {
 642                 cb(dpif, dpctl_p);
 643                 dpif_close(dpif);
 644             } else {
 645                 openerror = error;
 646                 dpctl_error(dpctl_p, error, "opening datapath %s failed",
 647                             name);
 648             }
 649         }
 650     }
 651
 652     sset_destroy(&dpif_names);
 653     sset_destroy(&dpif_types);
 654
 655     /* If there has been an error while opening a datapath it should be
 656      * reported.  Otherwise, we want to ignore the errors generated by
 657      * dp_enumerate_names() if at least one datapath has been discovered,
 658      * because they're not interesting for the user.  This happens, for
 659      * example, if OVS is using a userspace datapath and the kernel module
 660      * is not loaded. */
 661     if (openerror) {
 662         return openerror;
 663     } else {
 664         return at_least_one ? 0 : enumerror;
 665     }
 666 }
 667
 668 static int
 669 dpctl_show(int argc, const char *argv[], struct dpctl_params *dpctl_p)
 670 {
 671     int error, lasterror = 0;
 672     if (argc > 1) {
 673         int i;
 674         for (i = 1; i < argc; i++) {
 675             const char *name = argv[i];
 676             struct dpif *dpif;
 677
 678             error = parsed_dpif_open(name, false, &dpif);
 679             if (!error) {
 680                 show_dpif(dpif, dpctl_p);
 681                 dpif_close(dpif);
 682             } else {
 683                 dpctl_error(dpctl_p, error, "opening datapath %s failed",
 684                             name);
 685                 lasterror = error;
 686             }
 687         }
 688     } else {
 689         lasterror = dps_for_each(dpctl_p, show_dpif);
 690     }
 691
 692     return lasterror;
 693 }
 694
 695 static void
 696 dump_cb(struct dpif *dpif, struct dpctl_params *dpctl_p)
 697 {
 698     dpctl_print(dpctl_p, "%s\n", dpif_name(dpif));
 699 }
 700
 701 static int
 702 dpctl_dump_dps(int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
 703                struct dpctl_params *dpctl_p)
 704 {
 705     return dps_for_each(dpctl_p, dump_cb);
 706 }
 707
 708 static void
 709 format_dpif_flow(struct ds *ds, const struct dpif_flow *f, struct hmap *ports,
 710                  struct dpctl_params *dpctl_p)
 711 {
 712     if (dpctl_p->verbosity && f->ufid_present) {
 713         odp_format_ufid(&f->ufid, ds);
 714         ds_put_cstr(ds, ", ");
 715     }
 716     odp_flow_format(f->key, f->key_len, f->mask, f->mask_len, ports, ds,
 717                     dpctl_p->verbosity);
 718     ds_put_cstr(ds, ", ");
 719
 720     dpif_flow_stats_format(&f->stats, ds);
 721     ds_put_cstr(ds, ", actions:");
 722     format_odp_actions(ds, f->actions, f->actions_len);
 723 }
 724
 725 static int
 726 dpctl_dump_flows(int argc, const char *argv[], struct dpctl_params *dpctl_p)
 727 {
 728     struct dpif *dpif;
 729     struct ds ds;
 730     char *name;
 731
 732     char *filter = NULL;
 733     struct flow flow_filter;
 734     struct flow_wildcards wc_filter;
 735
 736     struct dpif_port_dump port_dump;
 737     struct dpif_port dpif_port;
 738     struct hmap portno_names;
 739     struct simap names_portno;
 740
 741     struct dpif_flow_dump_thread *flow_dump_thread;
 742     struct dpif_flow_dump *flow_dump;
 743     struct dpif_flow f;
 744     int pmd_id = PMD_ID_NULL;
 745     int error;
 746
 747     if (argc > 1 && !strncmp(argv[argc - 1], "filter=", 7)) {
 748         filter = xstrdup(argv[--argc] + 7);
 749     }
 750     name = (argc == 2) ? xstrdup(argv[1]) : get_one_dp(dpctl_p);
 751     if (!name) {
 752         error = EINVAL;
 753         goto out_freefilter;
 754     }
 755
 756     error = parsed_dpif_open(name, false, &dpif);
 757     free(name);
 758     if (error) {
 759         dpctl_error(dpctl_p, error, "opening datapath");
 760         goto out_freefilter;
 761     }
 762
 763
 764     hmap_init(&portno_names);
 765     simap_init(&names_portno);
 766     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, dpif) {
 767         odp_portno_names_set(&portno_names, dpif_port.port_no, dpif_port.name);
 768         simap_put(&names_portno, dpif_port.name,
 769                   odp_to_u32(dpif_port.port_no));
 770     }
 771
 772     if (filter) {
 773         char *err = parse_ofp_exact_flow(&flow_filter, &wc_filter.masks,
 774                                          filter, &names_portno);
 775         if (err) {
 776             dpctl_error(dpctl_p, 0, "Failed to parse filter (%s)", err);
 777             error = EINVAL;
 778             goto out_dpifclose;
 779         }
 780     }
 781
 782     /* Make sure that these values are different. PMD_ID_NULL means that the
 783      * pmd is unspecified (e.g. because the datapath doesn't have different
 784      * pmd threads), while NON_PMD_CORE_ID refers to every non pmd threads
 785      * in the userspace datapath */
 786     BUILD_ASSERT(PMD_ID_NULL != NON_PMD_CORE_ID);
 787
 788     ds_init(&ds);
 789     flow_dump = dpif_flow_dump_create(dpif, false);
 790     flow_dump_thread = dpif_flow_dump_thread_create(flow_dump);
 791     while (dpif_flow_dump_next(flow_dump_thread, &f, 1)) {
 792         if (filter) {
 793             struct flow flow;
 794             struct flow_wildcards wc;
 795             struct match match, match_filter;
 796             struct minimatch minimatch;
 797
 798             odp_flow_key_to_flow(f.key, f.key_len, &flow);
 799             odp_flow_key_to_mask(f.mask, f.mask_len, f.key, f.key_len,
 800                                  &wc.masks, &flow);
 801             match_init(&match, &flow, &wc);
 802
 803             match_init(&match_filter, &flow_filter, &wc);
 804             match_init(&match_filter, &match_filter.flow, &wc_filter);
 805             minimatch_init(&minimatch, &match_filter);
 806
 807             if (!minimatch_matches_flow(&minimatch, &match.flow)) {
 808                 minimatch_destroy(&minimatch);
 809                 continue;
 810             }
 811             minimatch_destroy(&minimatch);
 812         }
 813         ds_clear(&ds);
 814         /* If 'pmd_id' is specified, overlapping flows could be dumped from
 815          * different pmd threads.  So, separates dumps from different pmds
 816          * by printing a title line. */
 817         if (pmd_id != f.pmd_id) {
 818             if (f.pmd_id == NON_PMD_CORE_ID) {
 819                 ds_put_format(&ds, "flow-dump from non-dpdk interfaces:\n");
 820             } else {
 821                 ds_put_format(&ds, "flow-dump from pmd on cpu core: %d\n",
 822                               f.pmd_id);
 823             }
 824             pmd_id = f.pmd_id;
 825         }
 826         format_dpif_flow(&ds, &f, &portno_names, dpctl_p);
 827         dpctl_print(dpctl_p, "%s\n", ds_cstr(&ds));
 828     }
 829     dpif_flow_dump_thread_destroy(flow_dump_thread);
 830     error = dpif_flow_dump_destroy(flow_dump);
 831
 832     if (error) {
 833         dpctl_error(dpctl_p, error, "Failed to dump flows from datapath");
 834     }
 835     ds_destroy(&ds);
 836
 837 out_dpifclose:
 838     odp_portno_names_destroy(&portno_names);
 839     simap_destroy(&names_portno);
 840     hmap_destroy(&portno_names);
 841     dpif_close(dpif);
 842 out_freefilter:
 843     free(filter);
 844     return error;
 845 }
 846
 847 /* Extracts the in_port from the parsed keys, and returns the reference
 848  * to the 'struct netdev *' of the dpif port.  On error, returns NULL.
 849  * Users must call 'netdev_close()' after finish using the returned
 850  * reference. */
 851 static struct netdev *
 852 get_in_port_netdev_from_key(struct dpif *dpif, const struct ofpbuf *key)
 853 {
 854     const struct nlattr *in_port_nla;
 855     struct netdev *dev = NULL;
 856
 857     in_port_nla = nl_attr_find(key, 0, OVS_KEY_ATTR_IN_PORT);
 858     if (in_port_nla) {
 859         struct dpif_port dpif_port;
 860         odp_port_t port_no;
 861         int error;
 862
 863         port_no = ODP_PORT_C(nl_attr_get_u32(in_port_nla));
 864         error = dpif_port_query_by_number(dpif, port_no, &dpif_port);
 865         if (error) {
 866             goto out;
 867         }
 868
 869         netdev_open(dpif_port.name, dpif_port.type, &dev);
 870         dpif_port_destroy(&dpif_port);
 871     }
 872
 873 out:
 874     return dev;
 875 }
 876
 877 static int
 878 dpctl_put_flow(int argc, const char *argv[], enum dpif_flow_put_flags flags,
 879                struct dpctl_params *dpctl_p)
 880 {
 881     const char *key_s = argv[argc - 2];
 882     const char *actions_s = argv[argc - 1];
 883     struct netdev *in_port_netdev = NULL;
 884     struct dpif_flow_stats stats;
 885     struct dpif_port dpif_port;
 886     struct dpif_port_dump port_dump;
 887     struct ofpbuf actions;
 888     struct ofpbuf key;
 889     struct ofpbuf mask;
 890     struct dpif *dpif;
 891     ovs_u128 ufid;
 892     bool ufid_present;
 893     char *dp_name;
 894     struct simap port_names;
 895     int n, error;
 896
 897     dp_name = argc == 4 ? xstrdup(argv[1]) : get_one_dp(dpctl_p);
 898     if (!dp_name) {
 899         return EINVAL;
 900     }
 901     error = parsed_dpif_open(dp_name, false, &dpif);
 902     free(dp_name);
 903     if (error) {
 904         dpctl_error(dpctl_p, error, "opening datapath");
 905         return error;
 906     }
 907
 908     ufid_present = false;
 909     n = odp_ufid_from_string(key_s, &ufid);
 910     if (n < 0) {
 911         dpctl_error(dpctl_p, -n, "parsing flow ufid");
 912         return -n;
 913     } else if (n) {
 914         key_s += n;
 915         ufid_present = true;
 916     }
 917
 918     simap_init(&port_names);
 919     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, dpif) {
 920         simap_put(&port_names, dpif_port.name, odp_to_u32(dpif_port.port_no));
 921     }
 922
 923     ofpbuf_init(&key, 0);
 924     ofpbuf_init(&mask, 0);
 925     error = odp_flow_from_string(key_s, &port_names, &key, &mask);
 926     simap_destroy(&port_names);
 927     if (error) {
 928         dpctl_error(dpctl_p, error, "parsing flow key");
 929         goto out_freekeymask;
 930     }
 931
 932     ofpbuf_init(&actions, 0);
 933     error = odp_actions_from_string(actions_s, NULL, &actions);
 934     if (error) {
 935         dpctl_error(dpctl_p, error, "parsing actions");
 936         goto out_freeactions;
 937     }
 938
 939     /* For DPDK interface, applies the operation to all pmd threads
 940      * on the same numa node. */
 941     in_port_netdev = get_in_port_netdev_from_key(dpif, &key);
 942     if (in_port_netdev && netdev_is_pmd(in_port_netdev)) {
 943         int numa_id;
 944
 945         numa_id = netdev_get_numa_id(in_port_netdev);
 946         if (ovs_numa_numa_id_is_valid(numa_id)) {
 947             struct ovs_numa_dump *dump = ovs_numa_dump_cores_on_numa(numa_id);
 948             struct ovs_numa_info *iter;
 949
 950             FOR_EACH_CORE_ON_NUMA (iter, dump) {
 951                 if (ovs_numa_core_is_pinned(iter->core_id)) {
 952                     error = dpif_flow_put(dpif, flags,
 953                                           key.data, key.size,
 954                                           mask.size == 0 ? NULL : mask.data,
 955                                           mask.size, actions.data,
 956                                           actions.size, ufid_present ? &ufid : NULL,
 957                                           iter->core_id, dpctl_p->print_statistics ? &stats : NULL);
 958                 }
 959             }
 960             ovs_numa_dump_destroy(dump);
 961         } else {
 962             error = EINVAL;
 963         }
 964     } else {
 965         error = dpif_flow_put(dpif, flags,
 966                               key.data, key.size,
 967                               mask.size == 0 ? NULL : mask.data,
 968                               mask.size, actions.data,
 969                               actions.size, ufid_present ? &ufid : NULL,
 970                               PMD_ID_NULL, dpctl_p->print_statistics ? &stats : NULL);
 971     }
 972     if (error) {
 973         dpctl_error(dpctl_p, error, "updating flow table");
 974         goto out_freeactions;
 975     }
 976
 977     if (dpctl_p->print_statistics) {
 978         struct ds s;
 979
 980         ds_init(&s);
 981         dpif_flow_stats_format(&stats, &s);
 982         dpctl_print(dpctl_p, "%s\n", ds_cstr(&s));
 983         ds_destroy(&s);
 984     }
 985
 986 out_freeactions:
 987     ofpbuf_uninit(&actions);
 988 out_freekeymask:
 989     ofpbuf_uninit(&mask);
 990     ofpbuf_uninit(&key);
 991     dpif_close(dpif);
 992     netdev_close(in_port_netdev);
 993     return error;
 994 }
 995
 996 static int
 997 dpctl_add_flow(int argc, const char *argv[], struct dpctl_params *dpctl_p)
 998 {
 999     return dpctl_put_flow(argc, argv, DPIF_FP_CREATE, dpctl_p);
1000 }
1001
1002 static int
1003 dpctl_mod_flow(int argc, const char *argv[], struct dpctl_params *dpctl_p)
1004 {
1005     enum dpif_flow_put_flags flags;
1006
1007     flags = DPIF_FP_MODIFY;
1008     if (dpctl_p->may_create) {
1009         flags |= DPIF_FP_CREATE;
1010     }
1011     if (dpctl_p->zero_statistics) {
1012         flags |= DPIF_FP_ZERO_STATS;
1013     }
1014
1015     return dpctl_put_flow(argc, argv, flags, dpctl_p);
1016 }
1017
1018 static int
1019 dpctl_get_flow(int argc, const char *argv[], struct dpctl_params *dpctl_p)
1020 {
1021     const char *key_s = argv[argc - 1];
1022     struct dpif_flow flow;
1023     struct dpif_port dpif_port;
1024     struct dpif_port_dump port_dump;
1025     struct dpif *dpif;
1026     char *dp_name;
1027     struct hmap portno_names;
1028     ovs_u128 ufid;
1029     struct ofpbuf buf;
1030     uint64_t stub[DPIF_FLOW_BUFSIZE / 8];
1031     struct ds ds;
1032     int n, error;
1033
1034     dp_name = argc == 3 ? xstrdup(argv[1]) : get_one_dp(dpctl_p);
1035     if (!dp_name) {
1036         return EINVAL;
1037     }
1038     error = parsed_dpif_open(dp_name, false, &dpif);
1039     free(dp_name);
1040     if (error) {
1041         dpctl_error(dpctl_p, error, "opening datapath");
1042         return error;
1043     }
1044
1045     ofpbuf_use_stub(&buf, &stub, sizeof stub);
1046     hmap_init(&portno_names);
1047     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, dpif) {
1048         odp_portno_names_set(&portno_names, dpif_port.port_no, dpif_port.name);
1049     }
1050
1051     n = odp_ufid_from_string(key_s, &ufid);
1052     if (n <= 0) {
1053         dpctl_error(dpctl_p, -n, "parsing flow ufid");
1054         goto out;
1055     }
1056
1057     /* Does not work for DPDK, since do not know which 'pmd' to apply the
1058      * operation.  So, just uses PMD_ID_NULL. */
1059     error = dpif_flow_get(dpif, NULL, 0, &ufid, PMD_ID_NULL, &buf, &flow);
1060     if (error) {
1061         dpctl_error(dpctl_p, error, "getting flow");
1062         goto out;
1063     }
1064
1065     ds_init(&ds);
1066     format_dpif_flow(&ds, &flow, &portno_names, dpctl_p);
1067     dpctl_print(dpctl_p, "%s\n", ds_cstr(&ds));
1068     ds_destroy(&ds);
1069
1070 out:
1071     odp_portno_names_destroy(&portno_names);
1072     hmap_destroy(&portno_names);
1073     ofpbuf_uninit(&buf);
1074     dpif_close(dpif);
1075     return error;
1076 }
1077
1078 static int
1079 dpctl_del_flow(int argc, const char *argv[], struct dpctl_params *dpctl_p)
1080 {
1081     const char *key_s = argv[argc - 1];
1082     struct netdev *in_port_netdev = NULL;
1083     struct dpif_flow_stats stats;
1084     struct dpif_port dpif_port;
1085     struct dpif_port_dump port_dump;
1086     struct ofpbuf key;
1087     struct ofpbuf mask; /* To be ignored. */
1088     struct dpif *dpif;
1089     ovs_u128 ufid;
1090     bool ufid_present;
1091     char *dp_name;
1092     struct simap port_names;
1093     int n, error;
1094
1095     dp_name = argc == 3 ? xstrdup(argv[1]) : get_one_dp(dpctl_p);
1096     if (!dp_name) {
1097         return EINVAL;
1098     }
1099     error = parsed_dpif_open(dp_name, false, &dpif);
1100     free(dp_name);
1101     if (error) {
1102         dpctl_error(dpctl_p, error, "opening datapath");
1103         return error;
1104     }
1105
1106     ufid_present = false;
1107     n = odp_ufid_from_string(key_s, &ufid);
1108     if (n < 0) {
1109         dpctl_error(dpctl_p, -n, "parsing flow ufid");
1110         return -n;
1111     } else if (n) {
1112         key_s += n;
1113         ufid_present = true;
1114     }
1115
1116     simap_init(&port_names);
1117     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, dpif) {
1118         simap_put(&port_names, dpif_port.name, odp_to_u32(dpif_port.port_no));
1119     }
1120
1121     ofpbuf_init(&key, 0);
1122     ofpbuf_init(&mask, 0);
1123
1124     error = odp_flow_from_string(key_s, &port_names, &key, &mask);
1125     if (error) {
1126         dpctl_error(dpctl_p, error, "parsing flow key");
1127         goto out;
1128     }
1129
1130     /* For DPDK interface, applies the operation to all pmd threads
1131      * on the same numa node. */
1132     in_port_netdev = get_in_port_netdev_from_key(dpif, &key);
1133     if (in_port_netdev && netdev_is_pmd(in_port_netdev)) {
1134         int numa_id;
1135
1136         numa_id = netdev_get_numa_id(in_port_netdev);
1137         if (ovs_numa_numa_id_is_valid(numa_id)) {
1138             struct ovs_numa_dump *dump = ovs_numa_dump_cores_on_numa(numa_id);
1139             struct ovs_numa_info *iter;
1140
1141             FOR_EACH_CORE_ON_NUMA (iter, dump) {
1142                 if (ovs_numa_core_is_pinned(iter->core_id)) {
1143                     error = dpif_flow_del(dpif, key.data,
1144                                           key.size, ufid_present ? &ufid : NULL,
1145                                           iter->core_id, dpctl_p->print_statistics ? &stats : NULL);
1146                 }
1147             }
1148             ovs_numa_dump_destroy(dump);
1149         } else {
1150             error = EINVAL;
1151         }
1152     } else {
1153         error = dpif_flow_del(dpif, key.data, key.size,
1154                               ufid_present ? &ufid : NULL, PMD_ID_NULL,
1155                               dpctl_p->print_statistics ? &stats : NULL);
1156     }
1157     if (error) {
1158         dpctl_error(dpctl_p, error, "deleting flow");
1159         if (error == ENOENT && !ufid_present) {
1160             struct ds s;
1161
1162             ds_init(&s);
1163             ds_put_format(&s, "Perhaps you need to specify a UFID?");
1164             dpctl_print(dpctl_p, "%s\n", ds_cstr(&s));
1165             ds_destroy(&s);
1166         }
1167         goto out;
1168     }
1169
1170     if (dpctl_p->print_statistics) {
1171         struct ds s;
1172
1173         ds_init(&s);
1174         dpif_flow_stats_format(&stats, &s);
1175         dpctl_print(dpctl_p, "%s\n", ds_cstr(&s));
1176         ds_destroy(&s);
1177     }
1178
1179 out:
1180     ofpbuf_uninit(&mask);
1181     ofpbuf_uninit(&key);
1182     simap_destroy(&port_names);
1183     dpif_close(dpif);
1184     netdev_close(in_port_netdev);
1185     return error;
1186 }
1187
1188 static int
1189 dpctl_del_flows(int argc, const char *argv[], struct dpctl_params *dpctl_p)
1190 {
1191     struct dpif *dpif;
1192     char *name;
1193     int error;
1194
1195     name = (argc == 2) ? xstrdup(argv[1]) : get_one_dp(dpctl_p);
1196     if (!name) {
1197         return EINVAL;
1198     }
1199     error = parsed_dpif_open(name, false, &dpif);
1200     free(name);
1201     if (error) {
1202         dpctl_error(dpctl_p, error, "opening datapath");
1203         return error;
1204     }
1205
1206     error = dpif_flow_flush(dpif);
1207     if (error) {
1208         dpctl_error(dpctl_p, error, "deleting all flows");
1209     }
1210     dpif_close(dpif);
1211     return error;
1212 }
1213
1214 static int
1215 dpctl_help(int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
1216            struct dpctl_params *dpctl_p)
1217 {
1218     if (dpctl_p->usage) {
1219         dpctl_p->usage(dpctl_p->aux);
1220     }
1221
1222     return 0;
1223 }
1224
1225 static int
1226 dpctl_list_commands(int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
1227                     struct dpctl_params *dpctl_p)
1228 {
1229     struct ds ds = DS_EMPTY_INITIALIZER;
1230     const struct dpctl_command *commands = get_all_dpctl_commands();
1231
1232     ds_put_cstr(&ds, "The available commands are:\n");
1233     for (; commands->name; commands++) {
1234         const struct dpctl_command *c = commands;
1235
1236         ds_put_format(&ds, "  %s%-23s %s\n", dpctl_p->is_appctl ? "dpctl/" : "",
1237                       c->name, c->usage);
1238     }
1239     dpctl_puts(dpctl_p, false, ds.string);
1240     ds_destroy(&ds);
1241
1242     return 0;
1243 }
1244 \f
1245 /* Undocumented commands for unit testing. */
1246
1247 static int
1248 dpctl_parse_actions(int argc, const char *argv[], struct dpctl_params* dpctl_p)
1249 {
1250     int i, error = 0;
1251
1252     for (i = 1; i < argc; i++) {
1253         struct ofpbuf actions;
1254         struct ds s;
1255
1256         ofpbuf_init(&actions, 0);
1257         error = odp_actions_from_string(argv[i], NULL, &actions);
1258
1259         if (error) {
1260             ofpbuf_uninit(&actions);
1261             dpctl_error(dpctl_p, error, "odp_actions_from_string");
1262             return error;
1263         }
1264
1265         ds_init(&s);
1266         format_odp_actions(&s, actions.data, actions.size);
1267         dpctl_print(dpctl_p, "%s\n", ds_cstr(&s));
1268         ds_destroy(&s);
1269
1270         ofpbuf_uninit(&actions);
1271     }
1272
1273     return error;
1274 }
1275
1276 struct actions_for_flow {
1277     struct hmap_node hmap_node;
1278     struct flow flow;
1279     struct ofpbuf actions;
1280 };
1281
1282 static struct actions_for_flow *
1283 get_actions_for_flow(struct hmap *actions_per_flow, const struct flow *flow)
1284 {
1285     uint32_t hash = flow_hash(flow, 0);
1286     struct actions_for_flow *af;
1287
1288     HMAP_FOR_EACH_WITH_HASH (af, hmap_node, hash, actions_per_flow) {
1289         if (flow_equal(&af->flow, flow)) {
1290             return af;
1291         }
1292     }
1293
1294     af = xmalloc(sizeof *af);
1295     af->flow = *flow;
1296     ofpbuf_init(&af->actions, 0);
1297     hmap_insert(actions_per_flow, &af->hmap_node, hash);
1298     return af;
1299 }
1300
1301 static int
1302 compare_actions_for_flow(const void *a_, const void *b_)
1303 {
1304     struct actions_for_flow *const *a = a_;
1305     struct actions_for_flow *const *b = b_;
1306
1307     return flow_compare_3way(&(*a)->flow, &(*b)->flow);
1308 }
1309
1310 static int
1311 compare_output_actions(const void *a_, const void *b_)
1312 {
1313     const struct nlattr *a = a_;
1314     const struct nlattr *b = b_;
1315     uint32_t a_port = nl_attr_get_u32(a);
1316     uint32_t b_port = nl_attr_get_u32(b);
1317
1318     return a_port < b_port ? -1 : a_port > b_port;
1319 }
1320
1321 static void
1322 sort_output_actions__(struct nlattr *first, struct nlattr *end)
1323 {
1324     size_t bytes = (uint8_t *) end - (uint8_t *) first;
1325     size_t n = bytes / NL_A_U32_SIZE;
1326
1327     ovs_assert(bytes % NL_A_U32_SIZE == 0);
1328     qsort(first, n, NL_A_U32_SIZE, compare_output_actions);
1329 }
1330
1331 static void
1332 sort_output_actions(struct nlattr *actions, size_t length)
1333 {
1334     struct nlattr *first_output = NULL;
1335     struct nlattr *a;
1336     int left;
1337
1338     NL_ATTR_FOR_EACH (a, left, actions, length) {
1339         if (nl_attr_type(a) == OVS_ACTION_ATTR_OUTPUT) {
1340             if (!first_output) {
1341                 first_output = a;
1342             }
1343         } else {
1344             if (first_output) {
1345                 sort_output_actions__(first_output, a);
1346                 first_output = NULL;
1347             }
1348         }
1349     }
1350     if (first_output) {
1351         uint8_t *end = (uint8_t *) actions + length;
1352         sort_output_actions__(first_output,
1353                               ALIGNED_CAST(struct nlattr *, end));
1354     }
1355 }
1356
1357 /* usage: "ovs-dpctl normalize-actions FLOW ACTIONS" where FLOW and ACTIONS
1358  * have the syntax used by "ovs-dpctl dump-flows".
1359  *
1360  * This command prints ACTIONS in a format that shows what happens for each
1361  * VLAN, independent of the order of the ACTIONS.  For example, there is more
1362  * than one way to output a packet on VLANs 9 and 11, but this command will
1363  * print the same output for any form.
1364  *
1365  * The idea here generalizes beyond VLANs (e.g. to setting other fields) but
1366  * so far the implementation only covers VLANs. */
1367 static int
1368 dpctl_normalize_actions(int argc, const char *argv[],
1369                         struct dpctl_params *dpctl_p)
1370 {
1371     struct simap port_names;
1372     struct ofpbuf keybuf;
1373     struct flow flow;
1374     struct ofpbuf odp_actions;
1375     struct hmap actions_per_flow;
1376     struct actions_for_flow **afs;
1377     struct actions_for_flow *af;
1378     struct nlattr *a;
1379     size_t n_afs;
1380     struct ds s;
1381     int left;
1382     int i, error;
1383
1384     ds_init(&s);
1385
1386     simap_init(&port_names);
1387     for (i = 3; i < argc; i++) {
1388         char name[16];
1389         int number;
1390
1391         if (ovs_scan(argv[i], "%15[^=]=%d", name, &number)) {
1392             uintptr_t n = number;
1393             simap_put(&port_names, name, n);
1394         } else {
1395             dpctl_error(dpctl_p, 0, "%s: expected NAME=NUMBER", argv[i]);
1396             error = EINVAL;
1397             goto out;
1398         }
1399     }
1400
1401     /* Parse flow key. */
1402     ofpbuf_init(&keybuf, 0);
1403     error = odp_flow_from_string(argv[1], &port_names, &keybuf, NULL);
1404     if (error) {
1405         dpctl_error(dpctl_p, error, "odp_flow_key_from_string");
1406         goto out_freekeybuf;
1407     }
1408
1409     ds_clear(&s);
1410     odp_flow_format(keybuf.data, keybuf.size, NULL, 0, NULL,
1411                     &s, dpctl_p->verbosity);
1412     dpctl_print(dpctl_p, "input flow: %s\n", ds_cstr(&s));
1413
1414     error = odp_flow_key_to_flow(keybuf.data, keybuf.size, &flow);
1415     if (error) {
1416         dpctl_error(dpctl_p, error, "odp_flow_key_to_flow");
1417         goto out_freekeybuf;
1418     }
1419
1420     /* Parse actions. */
1421     ofpbuf_init(&odp_actions, 0);
1422     error = odp_actions_from_string(argv[2], &port_names, &odp_actions);
1423     if (error) {
1424         dpctl_error(dpctl_p, error, "odp_actions_from_string");
1425         goto out_freeactions;
1426     }
1427
1428     if (dpctl_p->verbosity) {
1429         ds_clear(&s);
1430         format_odp_actions(&s, odp_actions.data, odp_actions.size);
1431         dpctl_print(dpctl_p, "input actions: %s\n", ds_cstr(&s));
1432     }
1433
1434     hmap_init(&actions_per_flow);
1435     NL_ATTR_FOR_EACH (a, left, odp_actions.data, odp_actions.size) {
1436         const struct ovs_action_push_vlan *push;
1437         switch(nl_attr_type(a)) {
1438         case OVS_ACTION_ATTR_POP_VLAN:
1439             flow.vlan_tci = htons(0);
1440             continue;
1441
1442         case OVS_ACTION_ATTR_PUSH_VLAN:
1443             push = nl_attr_get_unspec(a, sizeof *push);
1444             flow.vlan_tci = push->vlan_tci;
1445             continue;
1446         }
1447
1448         af = get_actions_for_flow(&actions_per_flow, &flow);
1449         nl_msg_put_unspec(&af->actions, nl_attr_type(a),
1450                           nl_attr_get(a), nl_attr_get_size(a));
1451     }
1452
1453     n_afs = hmap_count(&actions_per_flow);
1454     afs = xmalloc(n_afs * sizeof *afs);
1455     i = 0;
1456     HMAP_FOR_EACH (af, hmap_node, &actions_per_flow) {
1457         afs[i++] = af;
1458     }
1459
1460     ovs_assert(i == n_afs);
1461     hmap_destroy(&actions_per_flow);
1462
1463     qsort(afs, n_afs, sizeof *afs, compare_actions_for_flow);
1464
1465     for (i = 0; i < n_afs; i++) {
1466         struct actions_for_flow *af = afs[i];
1467
1468         sort_output_actions(af->actions.data, af->actions.size);
1469
1470         if (af->flow.vlan_tci != htons(0)) {
1471             dpctl_print(dpctl_p, "vlan(vid=%"PRIu16",pcp=%d): ",
1472                         vlan_tci_to_vid(af->flow.vlan_tci),
1473                         vlan_tci_to_pcp(af->flow.vlan_tci));
1474         } else {
1475             dpctl_print(dpctl_p, "no vlan: ");
1476         }
1477
1478         if (eth_type_mpls(af->flow.dl_type)) {
1479             dpctl_print(dpctl_p, "mpls(label=%"PRIu32",tc=%d,ttl=%d): ",
1480                         mpls_lse_to_label(af->flow.mpls_lse[0]),
1481                         mpls_lse_to_tc(af->flow.mpls_lse[0]),
1482                         mpls_lse_to_ttl(af->flow.mpls_lse[0]));
1483         } else {
1484             dpctl_print(dpctl_p, "no mpls: ");
1485         }
1486
1487         ds_clear(&s);
1488         format_odp_actions(&s, af->actions.data, af->actions.size);
1489         dpctl_puts(dpctl_p, false, ds_cstr(&s));
1490
1491         ofpbuf_uninit(&af->actions);
1492         free(af);
1493     }
1494     free(afs);
1495
1496
1497 out_freeactions:
1498     ofpbuf_uninit(&odp_actions);
1499 out_freekeybuf:
1500     ofpbuf_uninit(&keybuf);
1501 out:
1502     simap_destroy(&port_names);
1503     ds_destroy(&s);
1504
1505     return error;
1506 }
1507 \f
1508 static const struct dpctl_command all_commands[] = {
1509     { "add-dp", "add-dp dp [iface...]", 1, INT_MAX, dpctl_add_dp },
1510     { "del-dp", "del-dp dp", 1, 1, dpctl_del_dp },
1511     { "add-if", "add-if dp iface...", 2, INT_MAX, dpctl_add_if },
1512     { "del-if", "del-if dp iface...", 2, INT_MAX, dpctl_del_if },
1513     { "set-if", "set-if dp iface...", 2, INT_MAX, dpctl_set_if },
1514     { "dump-dps", "", 0, 0, dpctl_dump_dps },
1515     { "show", "[dp...]", 0, INT_MAX, dpctl_show },
1516     { "dump-flows", "[dp]", 0, 2, dpctl_dump_flows },
1517     { "add-flow", "add-flow [dp] flow actions", 2, 3, dpctl_add_flow },
1518     { "mod-flow", "mod-flow [dp] flow actions", 2, 3, dpctl_mod_flow },
1519     { "get-flow", "get-flow [dp] ufid", 1, 2, dpctl_get_flow },
1520     { "del-flow", "del-flow [dp] flow", 1, 2, dpctl_del_flow },
1521     { "del-flows", "[dp]", 0, 1, dpctl_del_flows },
1522     { "help", "", 0, INT_MAX, dpctl_help },
1523     { "list-commands", "", 0, INT_MAX, dpctl_list_commands },
1524
1525     /* Undocumented commands for testing. */
1526     { "parse-actions", "actions", 1, INT_MAX, dpctl_parse_actions },
1527     { "normalize-actions", "actions", 2, INT_MAX, dpctl_normalize_actions },
1528
1529     { NULL, NULL, 0, 0, NULL },
1530 };
1531
1532 static const struct dpctl_command *get_all_dpctl_commands(void)
1533 {
1534     return all_commands;
1535 }
1536
1537 /* Runs the command designated by argv[0] within the command table specified by
1538  * 'commands', which must be terminated by a command whose 'name' member is a
1539  * null pointer. */
1540 int
1541 dpctl_run_command(int argc, const char *argv[], struct dpctl_params *dpctl_p)
1542 {
1543     const struct dpctl_command *p;
1544
1545     if (argc < 1) {
1546         dpctl_error(dpctl_p, 0, "missing command name; use --help for help");
1547         return EINVAL;
1548     }
1549
1550     for (p = all_commands; p->name != NULL; p++) {
1551         if (!strcmp(p->name, argv[0])) {
1552             int n_arg = argc - 1;
1553             if (n_arg < p->min_args) {
1554                 dpctl_error(dpctl_p, 0,
1555                             "'%s' command requires at least %d arguments",
1556                             p->name, p->min_args);
1557                 return EINVAL;
1558             } else if (n_arg > p->max_args) {
1559                 dpctl_error(dpctl_p, 0,
1560                             "'%s' command takes at most %d arguments",
1561                             p->name, p->max_args);
1562                 return EINVAL;
1563             } else {
1564                 return p->handler(argc, argv, dpctl_p);
1565             }
1566         }
1567     }
1568
1569     dpctl_error(dpctl_p, 0, "unknown command '%s'; use --help for help",
1570                 argv[0]);
1571     return EINVAL;
1572 }
1573 \f
1574 static void
1575 dpctl_unixctl_print(void *userdata, bool error OVS_UNUSED, const char *msg)
1576 {
1577     struct ds *ds = userdata;
1578     ds_put_cstr(ds, msg);
1579 }
1580
1581 static void
1582 dpctl_unixctl_handler(struct unixctl_conn *conn, int argc, const char *argv[],
1583                       void *aux)
1584 {
1585     struct ds ds = DS_EMPTY_INITIALIZER;
1586     struct dpctl_params dpctl_p;
1587     bool error = false;
1588
1589     dpctl_command_handler *handler = (dpctl_command_handler *) aux;
1590
1591     dpctl_p.print_statistics = false;
1592     dpctl_p.zero_statistics = false;
1593     dpctl_p.may_create = false;
1594     dpctl_p.verbosity = 0;
1595
1596     /* Parse options (like getopt). Unfortunately it does
1597      * not seem a good idea to call getopt_long() here, since it uses global
1598      * variables */
1599     while (argc > 1 && !error) {
1600         const char *arg = argv[1];
1601         if (!strncmp(arg, "--", 2)) {
1602             /* Long option */
1603             if (!strcmp(arg, "--statistics")) {
1604                 dpctl_p.print_statistics = true;
1605             } else if (!strcmp(arg, "--clear")) {
1606                 dpctl_p.zero_statistics = true;
1607             } else if (!strcmp(arg, "--may-create")) {
1608                 dpctl_p.may_create = true;
1609             } else if (!strcmp(arg, "--more")) {
1610                 dpctl_p.verbosity++;
1611             } else {
1612                 ds_put_format(&ds, "Unrecognized option %s", argv[1]);
1613                 error = true;
1614             }
1615         } else if (arg[0] == '-' && arg[1] != '\0') {
1616             /* Short option[s] */
1617             const char *opt = &arg[1];
1618
1619             while (*opt && !error) {
1620                 switch (*opt) {
1621                 case 'm':
1622                     dpctl_p.verbosity++;
1623                     break;
1624                 case 's':
1625                     dpctl_p.print_statistics = true;
1626                     break;
1627                 default:
1628                     ds_put_format(&ds, "Unrecognized option -%c", *opt);
1629                     error = true;
1630                     break;
1631                 }
1632                 opt++;
1633             }
1634         } else {
1635             /* Doesn't start with -, not an option */
1636             break;
1637         }
1638
1639         if (error) {
1640             break;
1641         }
1642         argv++;
1643         argc--;
1644     }
1645
1646     if (!error) {
1647         dpctl_p.is_appctl = true;
1648         dpctl_p.output = dpctl_unixctl_print;
1649         dpctl_p.aux = &ds;
1650
1651         error = handler(argc, argv, &dpctl_p) != 0;
1652     }
1653
1654     if (error) {
1655         unixctl_command_reply_error(conn, ds_cstr(&ds));
1656     } else {
1657         unixctl_command_reply(conn, ds_cstr(&ds));
1658     }
1659
1660     ds_destroy(&ds);
1661 }
1662
1663 void
1664 dpctl_unixctl_register(void)
1665 {
1666     const struct dpctl_command *p;
1667
1668     for (p = all_commands; p->name != NULL; p++) {
1669         char *cmd_name = xasprintf("dpctl/%s", p->name);
1670         unixctl_command_register(cmd_name, "", p->min_args, p->max_args,
1671                                  dpctl_unixctl_handler, p->handler);
1672         free(cmd_name);
1673     }
1674 }