rdma/utils.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * utils.c      RDMA tool
   4  * Authors:     Leon Romanovsky <leonro@mellanox.com>
   5  */
   6
   7 #include "rdma.h"
   8 #include <ctype.h>
   9 #include <inttypes.h>
  10
  11 int rd_argc(struct rd *rd)
  12 {
  13         return rd->argc;
  14 }
  15
  16 char *rd_argv(struct rd *rd)
  17 {
  18         if (!rd_argc(rd))
  19                 return NULL;
  20         return *rd->argv;
  21 }
  22
  23 int strcmpx(const char *str1, const char *str2)
  24 {
  25         if (strlen(str1) > strlen(str2))
  26                 return -1;
  27         return strncmp(str1, str2, strlen(str1));
  28 }
  29
  30 static bool rd_argv_match(struct rd *rd, const char *pattern)
  31 {
  32         if (!rd_argc(rd))
  33                 return false;
  34         return strcmpx(rd_argv(rd), pattern) == 0;
  35 }
  36
  37 void rd_arg_inc(struct rd *rd)
  38 {
  39         if (!rd_argc(rd))
  40                 return;
  41         rd->argc--;
  42         rd->argv++;
  43 }
  44
  45 bool rd_no_arg(struct rd *rd)
  46 {
  47         return rd_argc(rd) == 0;
  48 }
  49
  50 /*
  51  * Possible input:output
  52  * dev/port    | first port | is_dump_all
  53  * mlx5_1      | 0          | true
  54  * mlx5_1/     | 0          | true
  55  * mlx5_1/0    | 0          | false
  56  * mlx5_1/1    | 1          | false
  57  * mlx5_1/-    | 0          | false
  58  *
  59  * In strict mode, /- will return error.
  60  */
  61 static int get_port_from_argv(struct rd *rd, uint32_t *port,
  62                               bool *is_dump_all, bool strict_port)
  63 {
  64         char *slash;
  65
  66         *port = 0;
  67         *is_dump_all = true;
  68
  69         slash = strchr(rd_argv(rd), '/');
  70         /* if no port found, return 0 */
  71         if (slash++) {
  72                 if (*slash == '-') {
  73                         if (strict_port)
  74                                 return -EINVAL;
  75                         *is_dump_all = false;
  76                         return 0;
  77                 }
  78
  79                 if (isdigit(*slash)) {
  80                         *is_dump_all = false;
  81                         *port = atoi(slash);
  82                 }
  83                 if (!*port && strlen(slash))
  84                         return -EINVAL;
  85         }
  86         return 0;
  87 }
  88
  89 static struct dev_map *dev_map_alloc(const char *dev_name)
  90 {
  91         struct dev_map *dev_map;
  92
  93         dev_map = calloc(1, sizeof(*dev_map));
  94         if (!dev_map)
  95                 return NULL;
  96         dev_map->dev_name = strdup(dev_name);
  97         if (!dev_map->dev_name) {
  98                 free(dev_map);
  99                 return NULL;
 100         }
 101
 102         return dev_map;
 103 }
 104
 105 static void dev_map_cleanup(struct rd *rd)
 106 {
 107         struct dev_map *dev_map, *tmp;
 108
 109         list_for_each_entry_safe(dev_map, tmp,
 110                                  &rd->dev_map_list, list) {
 111                 list_del(&dev_map->list);
 112                 free(dev_map->dev_name);
 113                 free(dev_map);
 114         }
 115 }
 116
 117 static int add_filter(struct rd *rd, char *key, char *value,
 118                       const struct filters valid_filters[])
 119 {
 120         char cset[] = "1234567890,-";
 121         struct filter_entry *fe;
 122         bool key_found = false;
 123         int idx = 0;
 124         char *endp;
 125         int ret;
 126
 127         fe = calloc(1, sizeof(*fe));
 128         if (!fe)
 129                 return -ENOMEM;
 130
 131         while (idx < MAX_NUMBER_OF_FILTERS && valid_filters[idx].name) {
 132                 if (!strcmpx(key, valid_filters[idx].name)) {
 133                         key_found = true;
 134                         break;
 135                 }
 136                 idx++;
 137         }
 138         if (!key_found) {
 139                 pr_err("Unsupported filter option: %s\n", key);
 140                 ret = -EINVAL;
 141                 goto err;
 142         }
 143
 144         /*
 145          * Check the filter validity, not optimal, but works
 146          *
 147          * Actually, there are three types of filters
 148          *  numeric - for example PID or QPN
 149          *  string  - for example states
 150          *  link    - user requested to filter on specific link
 151          *            e.g. mlx5_1/1, mlx5_1/-, mlx5_1 ...
 152          */
 153         if (valid_filters[idx].is_number &&
 154             strspn(value, cset) != strlen(value)) {
 155                 pr_err("%s filter accepts \"%s\" characters only\n", key, cset);
 156                 ret = -EINVAL;
 157                 goto err;
 158         }
 159
 160         fe->key = strdup(key);
 161         fe->value = strdup(value);
 162         if (!fe->key || !fe->value) {
 163                 ret = -ENOMEM;
 164                 goto err_alloc;
 165         }
 166
 167         errno = 0;
 168         strtol(fe->value, &endp, 10);
 169         if (valid_filters[idx].is_doit && !errno && *endp == '\0')
 170                 fe->is_doit = true;
 171
 172         for (idx = 0; idx < strlen(fe->value); idx++)
 173                 fe->value[idx] = tolower(fe->value[idx]);
 174
 175         list_add_tail(&fe->list, &rd->filter_list);
 176         return 0;
 177
 178 err_alloc:
 179         free(fe->value);
 180         free(fe->key);
 181 err:
 182         free(fe);
 183         return ret;
 184 }
 185
 186 bool rd_doit_index(struct rd *rd, uint32_t *idx)
 187 {
 188         struct filter_entry *fe;
 189
 190         list_for_each_entry(fe, &rd->filter_list, list) {
 191                 if (fe->is_doit) {
 192                         *idx = atoi(fe->value);
 193                         return true;
 194                 }
 195         }
 196
 197         return false;
 198 }
 199
 200 int rd_build_filter(struct rd *rd, const struct filters valid_filters[])
 201 {
 202         int ret = 0;
 203         int idx = 0;
 204
 205         if (!valid_filters || !rd_argc(rd))
 206                 goto out;
 207
 208         if (rd_argc(rd) == 1) {
 209                 pr_err("No filter data was supplied to filter option %s\n", rd_argv(rd));
 210                 ret = -EINVAL;
 211                 goto out;
 212         }
 213
 214         if (rd_argc(rd) % 2) {
 215                 pr_err("There is filter option without data\n");
 216                 ret = -EINVAL;
 217                 goto out;
 218         }
 219
 220         while (idx != rd_argc(rd)) {
 221                 /*
 222                  * We can do micro-optimization and skip "dev"
 223                  * and "link" filters, but it is not worth of it.
 224                  */
 225                 ret = add_filter(rd, *(rd->argv + idx),
 226                                  *(rd->argv + idx + 1), valid_filters);
 227                 if (ret)
 228                         goto out;
 229                 idx += 2;
 230         }
 231
 232 out:
 233         return ret;
 234 }
 235
 236 static bool rd_check_is_key_exist(struct rd *rd, const char *key)
 237 {
 238         struct filter_entry *fe;
 239
 240         list_for_each_entry(fe, &rd->filter_list, list) {
 241                 if (!strcmpx(fe->key, key))
 242                         return true;
 243         }
 244
 245         return false;
 246 }
 247
 248 /*
 249  * Check if string entry is filtered:
 250  *  * key doesn't exist -> user didn't request -> not filtered
 251  */
 252 static bool rd_check_is_string_filtered(struct rd *rd, const char *key,
 253                                         const char *val)
 254 {
 255         bool key_is_filtered = false;
 256         struct filter_entry *fe;
 257         char *p = NULL;
 258         char *str;
 259
 260         list_for_each_entry(fe, &rd->filter_list, list) {
 261                 if (!strcmpx(fe->key, key)) {
 262                         /* We found the key */
 263                         p = strdup(fe->value);
 264                         key_is_filtered = true;
 265                         if (!p) {
 266                                 /*
 267                                  * Something extremely wrong if we fail
 268                                  * to allocate small amount of bytes.
 269                                  */
 270                                 pr_err("Found key, but failed to allocate memory to store value\n");
 271                                 return key_is_filtered;
 272                         }
 273
 274                         /*
 275                          * Need to check if value in range
 276                          * It can come in the following formats
 277                          * and their permutations:
 278                          * str
 279                          * str1,str2
 280                          */
 281                         str = strtok(p, ",");
 282                         while (str) {
 283                                 if (strlen(str) == strlen(val) &&
 284                                     !strcasecmp(str, val)) {
 285                                         key_is_filtered = false;
 286                                         goto out;
 287                                 }
 288                                 str = strtok(NULL, ",");
 289                         }
 290                         goto out;
 291                 }
 292         }
 293
 294 out:
 295         free(p);
 296         return key_is_filtered;
 297 }
 298
 299 /*
 300  * Check if key is filtered:
 301  * key doesn't exist -> user didn't request -> not filtered
 302  */
 303 static bool rd_check_is_filtered(struct rd *rd, const char *key, uint32_t val)
 304 {
 305         bool key_is_filtered = false;
 306         struct filter_entry *fe;
 307
 308         list_for_each_entry(fe, &rd->filter_list, list) {
 309                 uint32_t left_val = 0, fe_value = 0;
 310                 bool range_check = false;
 311                 char *p = fe->value;
 312
 313                 if (!strcmpx(fe->key, key)) {
 314                         /* We found the key */
 315                         key_is_filtered = true;
 316                         /*
 317                          * Need to check if value in range
 318                          * It can come in the following formats
 319                          * (and their permutations):
 320                          * numb
 321                          * numb1,numb2
 322                          * ,numb1,numb2
 323                          * numb1-numb2
 324                          * numb1,numb2-numb3,numb4-numb5
 325                          */
 326                         while (*p) {
 327                                 if (isdigit(*p)) {
 328                                         fe_value = strtol(p, &p, 10);
 329                                         if (fe_value == val ||
 330                                             (range_check && left_val < val &&
 331                                              val < fe_value)) {
 332                                                 key_is_filtered = false;
 333                                                 goto out;
 334                                         }
 335                                         range_check = false;
 336                                 } else {
 337                                         if (*p == '-') {
 338                                                 left_val = fe_value;
 339                                                 range_check = true;
 340                                         }
 341                                         p++;
 342                                 }
 343                         }
 344                         goto out;
 345                 }
 346         }
 347
 348 out:
 349         return key_is_filtered;
 350 }
 351
 352 bool rd_is_filtered_attr(struct rd *rd, const char *key, uint32_t val,
 353                          struct nlattr *attr)
 354 {
 355         if (!attr)
 356                 return rd_check_is_key_exist(rd, key);
 357
 358         return rd_check_is_filtered(rd, key, val);
 359 }
 360
 361 bool rd_is_string_filtered_attr(struct rd *rd, const char *key, const char *val,
 362                                 struct nlattr *attr)
 363 {
 364         if (!attr)
 365                 rd_check_is_key_exist(rd, key);
 366
 367         return rd_check_is_string_filtered(rd, key, val);
 368 }
 369
 370 static void filters_cleanup(struct rd *rd)
 371 {
 372         struct filter_entry *fe, *tmp;
 373
 374         list_for_each_entry_safe(fe, tmp,
 375                                  &rd->filter_list, list) {
 376                 list_del(&fe->list);
 377                 free(fe->key);
 378                 free(fe->value);
 379                 free(fe);
 380         }
 381 }
 382
 383 static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
 384         [RDMA_NLDEV_ATTR_DEV_INDEX] = MNL_TYPE_U32,
 385         [RDMA_NLDEV_ATTR_DEV_NAME] = MNL_TYPE_NUL_STRING,
 386         [RDMA_NLDEV_ATTR_PORT_INDEX] = MNL_TYPE_U32,
 387         [RDMA_NLDEV_ATTR_CAP_FLAGS] = MNL_TYPE_U64,
 388         [RDMA_NLDEV_ATTR_FW_VERSION] = MNL_TYPE_NUL_STRING,
 389         [RDMA_NLDEV_ATTR_NODE_GUID] = MNL_TYPE_U64,
 390         [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = MNL_TYPE_U64,
 391         [RDMA_NLDEV_ATTR_LID] = MNL_TYPE_U32,
 392         [RDMA_NLDEV_ATTR_SM_LID] = MNL_TYPE_U32,
 393         [RDMA_NLDEV_ATTR_LMC] = MNL_TYPE_U8,
 394         [RDMA_NLDEV_ATTR_PORT_STATE] = MNL_TYPE_U8,
 395         [RDMA_NLDEV_ATTR_PORT_PHYS_STATE] = MNL_TYPE_U8,
 396         [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = MNL_TYPE_U8,
 397         [RDMA_NLDEV_ATTR_RES_SUMMARY]   = MNL_TYPE_NESTED,
 398         [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY]     = MNL_TYPE_NESTED,
 399         [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_NAME] = MNL_TYPE_NUL_STRING,
 400         [RDMA_NLDEV_ATTR_RES_SUMMARY_ENTRY_CURR] = MNL_TYPE_U64,
 401         [RDMA_NLDEV_ATTR_RES_QP]                = MNL_TYPE_NESTED,
 402         [RDMA_NLDEV_ATTR_RES_QP_ENTRY]          = MNL_TYPE_NESTED,
 403         [RDMA_NLDEV_ATTR_RES_LQPN]      = MNL_TYPE_U32,
 404         [RDMA_NLDEV_ATTR_RES_RQPN]      = MNL_TYPE_U32,
 405         [RDMA_NLDEV_ATTR_RES_RQ_PSN]            = MNL_TYPE_U32,
 406         [RDMA_NLDEV_ATTR_RES_SQ_PSN]            = MNL_TYPE_U32,
 407         [RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE]    = MNL_TYPE_U8,
 408         [RDMA_NLDEV_ATTR_RES_TYPE]              = MNL_TYPE_U8,
 409         [RDMA_NLDEV_ATTR_RES_STATE]             = MNL_TYPE_U8,
 410         [RDMA_NLDEV_ATTR_RES_PID]               = MNL_TYPE_U32,
 411         [RDMA_NLDEV_ATTR_RES_KERN_NAME] = MNL_TYPE_NUL_STRING,
 412         [RDMA_NLDEV_ATTR_RES_CM_ID]             = MNL_TYPE_NESTED,
 413         [RDMA_NLDEV_ATTR_RES_CM_ID_ENTRY]       = MNL_TYPE_NESTED,
 414         [RDMA_NLDEV_ATTR_RES_PS]                = MNL_TYPE_U32,
 415         [RDMA_NLDEV_ATTR_RES_SRC_ADDR]          = MNL_TYPE_UNSPEC,
 416         [RDMA_NLDEV_ATTR_RES_DST_ADDR]          = MNL_TYPE_UNSPEC,
 417         [RDMA_NLDEV_ATTR_RES_CQ] = MNL_TYPE_NESTED,
 418         [RDMA_NLDEV_ATTR_RES_CQ_ENTRY] = MNL_TYPE_NESTED,
 419         [RDMA_NLDEV_ATTR_RES_CQE] = MNL_TYPE_U32,
 420         [RDMA_NLDEV_ATTR_RES_USECNT] = MNL_TYPE_U64,
 421         [RDMA_NLDEV_ATTR_RES_POLL_CTX] = MNL_TYPE_U8,
 422         [RDMA_NLDEV_ATTR_RES_MR] = MNL_TYPE_NESTED,
 423         [RDMA_NLDEV_ATTR_RES_MR_ENTRY] = MNL_TYPE_NESTED,
 424         [RDMA_NLDEV_ATTR_RES_RKEY] = MNL_TYPE_U32,
 425         [RDMA_NLDEV_ATTR_RES_LKEY] = MNL_TYPE_U32,
 426         [RDMA_NLDEV_ATTR_RES_IOVA] = MNL_TYPE_U64,
 427         [RDMA_NLDEV_ATTR_RES_MRLEN] = MNL_TYPE_U64,
 428         [RDMA_NLDEV_ATTR_NDEV_INDEX]            = MNL_TYPE_U32,
 429         [RDMA_NLDEV_ATTR_NDEV_NAME]             = MNL_TYPE_NUL_STRING,
 430         [RDMA_NLDEV_ATTR_DRIVER] = MNL_TYPE_NESTED,
 431         [RDMA_NLDEV_ATTR_DRIVER_ENTRY] = MNL_TYPE_NESTED,
 432         [RDMA_NLDEV_ATTR_DRIVER_STRING] = MNL_TYPE_NUL_STRING,
 433         [RDMA_NLDEV_ATTR_DRIVER_PRINT_TYPE] = MNL_TYPE_U8,
 434         [RDMA_NLDEV_ATTR_DRIVER_S32] = MNL_TYPE_U32,
 435         [RDMA_NLDEV_ATTR_DRIVER_U32] = MNL_TYPE_U32,
 436         [RDMA_NLDEV_ATTR_DRIVER_S64] = MNL_TYPE_U64,
 437         [RDMA_NLDEV_ATTR_DRIVER_U64] = MNL_TYPE_U64,
 438 };
 439
 440 int rd_attr_check(const struct nlattr *attr, int *typep)
 441 {
 442         int type;
 443
 444         if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX) < 0)
 445                 return MNL_CB_ERROR;
 446
 447         type = mnl_attr_get_type(attr);
 448
 449         if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
 450                 return MNL_CB_ERROR;
 451
 452         *typep = nldev_policy[type];
 453         return MNL_CB_OK;
 454 }
 455
 456 int rd_attr_cb(const struct nlattr *attr, void *data)
 457 {
 458         const struct nlattr **tb = data;
 459         int type;
 460
 461         if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX - 1) < 0)
 462                 /* We received unknown attribute */
 463                 return MNL_CB_OK;
 464
 465         type = mnl_attr_get_type(attr);
 466
 467         if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
 468                 return MNL_CB_ERROR;
 469
 470         tb[type] = attr;
 471         return MNL_CB_OK;
 472 }
 473
 474 int rd_dev_init_cb(const struct nlmsghdr *nlh, void *data)
 475 {
 476         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
 477         struct dev_map *dev_map;
 478         struct rd *rd = data;
 479         const char *dev_name;
 480
 481         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
 482         if (!tb[RDMA_NLDEV_ATTR_DEV_NAME] || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
 483                 return MNL_CB_ERROR;
 484         if (!tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
 485                 pr_err("This tool doesn't support switches yet\n");
 486                 return MNL_CB_ERROR;
 487         }
 488
 489         dev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 490
 491         dev_map = dev_map_alloc(dev_name);
 492         if (!dev_map)
 493                 /* The main function will cleanup the allocations */
 494                 return MNL_CB_ERROR;
 495         list_add_tail(&dev_map->list, &rd->dev_map_list);
 496
 497         dev_map->num_ports = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
 498         dev_map->idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 499         return MNL_CB_OK;
 500 }
 501
 502 void rd_free(struct rd *rd)
 503 {
 504         if (!rd)
 505                 return;
 506         free(rd->buff);
 507         dev_map_cleanup(rd);
 508         filters_cleanup(rd);
 509 }
 510
 511 int rd_set_arg_to_devname(struct rd *rd)
 512 {
 513         int ret = 0;
 514
 515         while (!rd_no_arg(rd)) {
 516                 if (rd_argv_match(rd, "dev") || rd_argv_match(rd, "link")) {
 517                         rd_arg_inc(rd);
 518                         if (rd_no_arg(rd)) {
 519                                 pr_err("No device name was supplied\n");
 520                                 ret = -EINVAL;
 521                         }
 522                         goto out;
 523                 }
 524                 rd_arg_inc(rd);
 525         }
 526 out:
 527         return ret;
 528 }
 529
 530 int rd_exec_link(struct rd *rd, int (*cb)(struct rd *rd), bool strict_port)
 531 {
 532         struct dev_map *dev_map;
 533         uint32_t port;
 534         int ret = 0;
 535
 536         if (rd->json_output)
 537                 jsonw_start_array(rd->jw);
 538         if (rd_no_arg(rd)) {
 539                 list_for_each_entry(dev_map, &rd->dev_map_list, list) {
 540                         rd->dev_idx = dev_map->idx;
 541                         port = (strict_port) ? 1 : 0;
 542                         for (; port < dev_map->num_ports + 1; port++) {
 543                                 rd->port_idx = port;
 544                                 ret = cb(rd);
 545                                 if (ret)
 546                                         goto out;
 547                         }
 548                 }
 549
 550         } else {
 551                 bool is_dump_all;
 552
 553                 dev_map = dev_map_lookup(rd, true);
 554                 ret = get_port_from_argv(rd, &port, &is_dump_all, strict_port);
 555                 if (!dev_map || port > dev_map->num_ports || (!port && ret)) {
 556                         pr_err("Wrong device name\n");
 557                         ret = -ENOENT;
 558                         goto out;
 559                 }
 560                 rd_arg_inc(rd);
 561                 rd->dev_idx = dev_map->idx;
 562                 rd->port_idx = port;
 563                 for (; rd->port_idx < dev_map->num_ports + 1; rd->port_idx++) {
 564                         ret = cb(rd);
 565                         if (ret)
 566                                 goto out;
 567                         if (!is_dump_all)
 568                                 /*
 569                                  * We got request to show link for devname
 570                                  * with port index.
 571                                  */
 572                                 break;
 573                 }
 574         }
 575
 576 out:
 577         if (rd->json_output)
 578                 jsonw_end_array(rd->jw);
 579         return ret;
 580 }
 581
 582 int rd_exec_dev(struct rd *rd, int (*cb)(struct rd *rd))
 583 {
 584         struct dev_map *dev_map;
 585         int ret = 0;
 586
 587         if (rd->json_output)
 588                 jsonw_start_array(rd->jw);
 589         if (rd_no_arg(rd)) {
 590                 list_for_each_entry(dev_map, &rd->dev_map_list, list) {
 591                         rd->dev_idx = dev_map->idx;
 592                         ret = cb(rd);
 593                         if (ret)
 594                                 goto out;
 595                 }
 596         } else {
 597                 dev_map = dev_map_lookup(rd, false);
 598                 if (!dev_map) {
 599                         pr_err("Wrong device name - %s\n", rd_argv(rd));
 600                         ret = -ENOENT;
 601                         goto out;
 602                 }
 603                 rd_arg_inc(rd);
 604                 rd->dev_idx = dev_map->idx;
 605                 ret = cb(rd);
 606         }
 607 out:
 608         if (rd->json_output)
 609                 jsonw_end_array(rd->jw);
 610         return ret;
 611 }
 612
 613 int rd_exec_require_dev(struct rd *rd, int (*cb)(struct rd *rd))
 614 {
 615         if (rd_no_arg(rd)) {
 616                 pr_err("Please provide device name.\n");
 617                 return -EINVAL;
 618         }
 619
 620         return rd_exec_dev(rd, cb);
 621 }
 622
 623 int rd_exec_cmd(struct rd *rd, const struct rd_cmd *cmds, const char *str)
 624 {
 625         const struct rd_cmd *c;
 626
 627         /* First argument in objs table is default variant */
 628         if (rd_no_arg(rd))
 629                 return cmds->func(rd);
 630
 631         for (c = cmds + 1; c->cmd; ++c) {
 632                 if (rd_argv_match(rd, c->cmd)) {
 633                         /* Move to next argument */
 634                         rd_arg_inc(rd);
 635                         return c->func(rd);
 636                 }
 637         }
 638
 639         pr_err("Unknown %s '%s'.\n", str, rd_argv(rd));
 640         return 0;
 641 }
 642
 643 void rd_prepare_msg(struct rd *rd, uint32_t cmd, uint32_t *seq, uint16_t flags)
 644 {
 645         *seq = time(NULL);
 646
 647         rd->nlh = mnl_nlmsg_put_header(rd->buff);
 648         rd->nlh->nlmsg_type = RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, cmd);
 649         rd->nlh->nlmsg_seq = *seq;
 650         rd->nlh->nlmsg_flags = flags;
 651 }
 652
 653 int rd_send_msg(struct rd *rd)
 654 {
 655         int ret;
 656
 657         rd->nl = mnl_socket_open(NETLINK_RDMA);
 658         if (!rd->nl) {
 659                 pr_err("Failed to open NETLINK_RDMA socket\n");
 660                 return -ENODEV;
 661         }
 662
 663         ret = mnl_socket_bind(rd->nl, 0, MNL_SOCKET_AUTOPID);
 664         if (ret < 0) {
 665                 pr_err("Failed to bind socket with err %d\n", ret);
 666                 goto err;
 667         }
 668
 669         ret = mnl_socket_sendto(rd->nl, rd->nlh, rd->nlh->nlmsg_len);
 670         if (ret < 0) {
 671                 pr_err("Failed to send to socket with err %d\n", ret);
 672                 goto err;
 673         }
 674         return 0;
 675
 676 err:
 677         mnl_socket_close(rd->nl);
 678         return ret;
 679 }
 680
 681 int rd_recv_msg(struct rd *rd, mnl_cb_t callback, void *data, unsigned int seq)
 682 {
 683         int ret;
 684         unsigned int portid;
 685         char buf[MNL_SOCKET_BUFFER_SIZE];
 686
 687         portid = mnl_socket_get_portid(rd->nl);
 688         do {
 689                 ret = mnl_socket_recvfrom(rd->nl, buf, sizeof(buf));
 690                 if (ret <= 0)
 691                         break;
 692
 693                 ret = mnl_cb_run(buf, ret, seq, portid, callback, data);
 694         } while (ret > 0);
 695
 696         mnl_socket_close(rd->nl);
 697         return ret;
 698 }
 699
 700 static struct dev_map *_dev_map_lookup(struct rd *rd, const char *dev_name)
 701 {
 702         struct dev_map *dev_map;
 703
 704         list_for_each_entry(dev_map, &rd->dev_map_list, list)
 705                 if (strcmp(dev_name, dev_map->dev_name) == 0)
 706                         return dev_map;
 707
 708         return NULL;
 709 }
 710
 711 struct dev_map *dev_map_lookup(struct rd *rd, bool allow_port_index)
 712 {
 713         struct dev_map *dev_map;
 714         char *dev_name;
 715         char *slash;
 716
 717         if (rd_no_arg(rd))
 718                 return NULL;
 719
 720         dev_name = strdup(rd_argv(rd));
 721         if (allow_port_index) {
 722                 slash = strrchr(dev_name, '/');
 723                 if (slash)
 724                         *slash = '\0';
 725         }
 726
 727         dev_map = _dev_map_lookup(rd, dev_name);
 728         free(dev_name);
 729         return dev_map;
 730 }
 731
 732 #define nla_type(attr) ((attr)->nla_type & NLA_TYPE_MASK)
 733
 734 void newline(struct rd *rd)
 735 {
 736         if (rd->json_output)
 737                 jsonw_end_array(rd->jw);
 738         else
 739                 pr_out("\n");
 740 }
 741
 742 void newline_indent(struct rd *rd)
 743 {
 744         newline(rd);
 745         if (!rd->json_output)
 746                 pr_out("    ");
 747 }
 748
 749 static int print_driver_string(struct rd *rd, const char *key_str,
 750                                  const char *val_str)
 751 {
 752         if (rd->json_output) {
 753                 jsonw_string_field(rd->jw, key_str, val_str);
 754                 return 0;
 755         } else {
 756                 return pr_out("%s %s ", key_str, val_str);
 757         }
 758 }
 759
 760 static int print_driver_s32(struct rd *rd, const char *key_str, int32_t val,
 761                               enum rdma_nldev_print_type print_type)
 762 {
 763         if (rd->json_output) {
 764                 jsonw_int_field(rd->jw, key_str, val);
 765                 return 0;
 766         }
 767         switch (print_type) {
 768         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 769                 return pr_out("%s %d ", key_str, val);
 770         case RDMA_NLDEV_PRINT_TYPE_HEX:
 771                 return pr_out("%s 0x%x ", key_str, val);
 772         default:
 773                 return -EINVAL;
 774         }
 775 }
 776
 777 static int print_driver_u32(struct rd *rd, const char *key_str, uint32_t val,
 778                               enum rdma_nldev_print_type print_type)
 779 {
 780         if (rd->json_output) {
 781                 jsonw_int_field(rd->jw, key_str, val);
 782                 return 0;
 783         }
 784         switch (print_type) {
 785         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 786                 return pr_out("%s %u ", key_str, val);
 787         case RDMA_NLDEV_PRINT_TYPE_HEX:
 788                 return pr_out("%s 0x%x ", key_str, val);
 789         default:
 790                 return -EINVAL;
 791         }
 792 }
 793
 794 static int print_driver_s64(struct rd *rd, const char *key_str, int64_t val,
 795                               enum rdma_nldev_print_type print_type)
 796 {
 797         if (rd->json_output) {
 798                 jsonw_int_field(rd->jw, key_str, val);
 799                 return 0;
 800         }
 801         switch (print_type) {
 802         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 803                 return pr_out("%s %" PRId64 " ", key_str, val);
 804         case RDMA_NLDEV_PRINT_TYPE_HEX:
 805                 return pr_out("%s 0x%" PRIx64 " ", key_str, val);
 806         default:
 807                 return -EINVAL;
 808         }
 809 }
 810
 811 static int print_driver_u64(struct rd *rd, const char *key_str, uint64_t val,
 812                               enum rdma_nldev_print_type print_type)
 813 {
 814         if (rd->json_output) {
 815                 jsonw_int_field(rd->jw, key_str, val);
 816                 return 0;
 817         }
 818         switch (print_type) {
 819         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 820                 return pr_out("%s %" PRIu64 " ", key_str, val);
 821         case RDMA_NLDEV_PRINT_TYPE_HEX:
 822                 return pr_out("%s 0x%" PRIx64 " ", key_str, val);
 823         default:
 824                 return -EINVAL;
 825         }
 826 }
 827
 828 static int print_driver_entry(struct rd *rd, struct nlattr *key_attr,
 829                                 struct nlattr *val_attr,
 830                                 enum rdma_nldev_print_type print_type)
 831 {
 832         const char *key_str = mnl_attr_get_str(key_attr);
 833         int attr_type = nla_type(val_attr);
 834
 835         switch (attr_type) {
 836         case RDMA_NLDEV_ATTR_DRIVER_STRING:
 837                 return print_driver_string(rd, key_str,
 838                                 mnl_attr_get_str(val_attr));
 839         case RDMA_NLDEV_ATTR_DRIVER_S32:
 840                 return print_driver_s32(rd, key_str,
 841                                 mnl_attr_get_u32(val_attr), print_type);
 842         case RDMA_NLDEV_ATTR_DRIVER_U32:
 843                 return print_driver_u32(rd, key_str,
 844                                 mnl_attr_get_u32(val_attr), print_type);
 845         case RDMA_NLDEV_ATTR_DRIVER_S64:
 846                 return print_driver_s64(rd, key_str,
 847                                 mnl_attr_get_u64(val_attr), print_type);
 848         case RDMA_NLDEV_ATTR_DRIVER_U64:
 849                 return print_driver_u64(rd, key_str,
 850                                 mnl_attr_get_u64(val_attr), print_type);
 851         }
 852         return -EINVAL;
 853 }
 854
 855 void print_driver_table(struct rd *rd, struct nlattr *tb)
 856 {
 857         int print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
 858         struct nlattr *tb_entry, *key = NULL, *val;
 859         int type, cc = 0;
 860         int ret;
 861
 862         if (!rd->show_driver_details || !tb)
 863                 return;
 864
 865         if (rd->pretty_output)
 866                 newline_indent(rd);
 867
 868         /*
 869          * Driver attrs are tuples of {key, [print-type], value}.
 870          * The key must be a string.  If print-type is present, it
 871          * defines an alternate printf format type vs the native format
 872          * for the attribute.  And the value can be any available
 873          * driver type.
 874          */
 875         mnl_attr_for_each_nested(tb_entry, tb) {
 876
 877                 if (cc > MAX_LINE_LENGTH) {
 878                         if (rd->pretty_output)
 879                                 newline_indent(rd);
 880                         cc = 0;
 881                 }
 882                 if (rd_attr_check(tb_entry, &type) != MNL_CB_OK)
 883                         return;
 884                 if (!key) {
 885                         if (type != MNL_TYPE_NUL_STRING)
 886                                 return;
 887                         key = tb_entry;
 888                 } else if (type == MNL_TYPE_U8) {
 889                         print_type = mnl_attr_get_u8(tb_entry);
 890                 } else {
 891                         val = tb_entry;
 892                         ret = print_driver_entry(rd, key, val, print_type);
 893                         if (ret < 0)
 894                                 return;
 895                         cc += ret;
 896                         print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
 897                         key = NULL;
 898                 }
 899         }
 900         return;
 901 }