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         [RDMA_NLDEV_SYS_ATTR_NETNS_MODE] = MNL_TYPE_U8,
 439         [RDMA_NLDEV_ATTR_STAT_COUNTER] = MNL_TYPE_NESTED,
 440         [RDMA_NLDEV_ATTR_STAT_COUNTER_ENTRY] = MNL_TYPE_NESTED,
 441         [RDMA_NLDEV_ATTR_STAT_COUNTER_ID] = MNL_TYPE_U32,
 442         [RDMA_NLDEV_ATTR_STAT_HWCOUNTERS] = MNL_TYPE_NESTED,
 443         [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY] = MNL_TYPE_NESTED,
 444         [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_NAME] = MNL_TYPE_NUL_STRING,
 445         [RDMA_NLDEV_ATTR_STAT_HWCOUNTER_ENTRY_VALUE] = MNL_TYPE_U64,
 446         [RDMA_NLDEV_ATTR_STAT_MODE] = MNL_TYPE_U32,
 447         [RDMA_NLDEV_ATTR_STAT_RES] = MNL_TYPE_U32,
 448 };
 449
 450 int rd_attr_check(const struct nlattr *attr, int *typep)
 451 {
 452         int type;
 453
 454         if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX) < 0)
 455                 return MNL_CB_ERROR;
 456
 457         type = mnl_attr_get_type(attr);
 458
 459         if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
 460                 return MNL_CB_ERROR;
 461
 462         *typep = nldev_policy[type];
 463         return MNL_CB_OK;
 464 }
 465
 466 int rd_attr_cb(const struct nlattr *attr, void *data)
 467 {
 468         const struct nlattr **tb = data;
 469         int type;
 470
 471         if (mnl_attr_type_valid(attr, RDMA_NLDEV_ATTR_MAX - 1) < 0)
 472                 /* We received unknown attribute */
 473                 return MNL_CB_OK;
 474
 475         type = mnl_attr_get_type(attr);
 476
 477         if (mnl_attr_validate(attr, nldev_policy[type]) < 0)
 478                 return MNL_CB_ERROR;
 479
 480         tb[type] = attr;
 481         return MNL_CB_OK;
 482 }
 483
 484 int rd_dev_init_cb(const struct nlmsghdr *nlh, void *data)
 485 {
 486         struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
 487         struct dev_map *dev_map;
 488         struct rd *rd = data;
 489         const char *dev_name;
 490
 491         mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
 492         if (!tb[RDMA_NLDEV_ATTR_DEV_NAME] || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
 493                 return MNL_CB_ERROR;
 494         if (!tb[RDMA_NLDEV_ATTR_PORT_INDEX]) {
 495                 pr_err("This tool doesn't support switches yet\n");
 496                 return MNL_CB_ERROR;
 497         }
 498
 499         dev_name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
 500
 501         dev_map = dev_map_alloc(dev_name);
 502         if (!dev_map)
 503                 /* The main function will cleanup the allocations */
 504                 return MNL_CB_ERROR;
 505         list_add_tail(&dev_map->list, &rd->dev_map_list);
 506
 507         dev_map->num_ports = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
 508         dev_map->idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
 509         return MNL_CB_OK;
 510 }
 511
 512 void rd_free(struct rd *rd)
 513 {
 514         if (!rd)
 515                 return;
 516         free(rd->buff);
 517         dev_map_cleanup(rd);
 518         filters_cleanup(rd);
 519 }
 520
 521 int rd_set_arg_to_devname(struct rd *rd)
 522 {
 523         int ret = 0;
 524
 525         while (!rd_no_arg(rd)) {
 526                 if (rd_argv_match(rd, "dev") || rd_argv_match(rd, "link")) {
 527                         rd_arg_inc(rd);
 528                         if (rd_no_arg(rd)) {
 529                                 pr_err("No device name was supplied\n");
 530                                 ret = -EINVAL;
 531                         }
 532                         goto out;
 533                 }
 534                 rd_arg_inc(rd);
 535         }
 536 out:
 537         return ret;
 538 }
 539
 540 int rd_exec_link(struct rd *rd, int (*cb)(struct rd *rd), bool strict_port)
 541 {
 542         struct dev_map *dev_map;
 543         uint32_t port;
 544         int ret = 0;
 545
 546         if (rd->json_output)
 547                 jsonw_start_array(rd->jw);
 548         if (rd_no_arg(rd)) {
 549                 list_for_each_entry(dev_map, &rd->dev_map_list, list) {
 550                         rd->dev_idx = dev_map->idx;
 551                         port = (strict_port) ? 1 : 0;
 552                         for (; port < dev_map->num_ports + 1; port++) {
 553                                 rd->port_idx = port;
 554                                 ret = cb(rd);
 555                                 if (ret)
 556                                         goto out;
 557                         }
 558                 }
 559
 560         } else {
 561                 bool is_dump_all;
 562
 563                 dev_map = dev_map_lookup(rd, true);
 564                 ret = get_port_from_argv(rd, &port, &is_dump_all, strict_port);
 565                 if (!dev_map || port > dev_map->num_ports || (!port && ret)) {
 566                         pr_err("Wrong device name\n");
 567                         ret = -ENOENT;
 568                         goto out;
 569                 }
 570                 rd_arg_inc(rd);
 571                 rd->dev_idx = dev_map->idx;
 572                 rd->port_idx = port;
 573                 for (; rd->port_idx < dev_map->num_ports + 1; rd->port_idx++) {
 574                         ret = cb(rd);
 575                         if (ret)
 576                                 goto out;
 577                         if (!is_dump_all)
 578                                 /*
 579                                  * We got request to show link for devname
 580                                  * with port index.
 581                                  */
 582                                 break;
 583                 }
 584         }
 585
 586 out:
 587         if (rd->json_output)
 588                 jsonw_end_array(rd->jw);
 589         return ret;
 590 }
 591
 592 int rd_exec_dev(struct rd *rd, int (*cb)(struct rd *rd))
 593 {
 594         struct dev_map *dev_map;
 595         int ret = 0;
 596
 597         if (rd->json_output)
 598                 jsonw_start_array(rd->jw);
 599         if (rd_no_arg(rd)) {
 600                 list_for_each_entry(dev_map, &rd->dev_map_list, list) {
 601                         rd->dev_idx = dev_map->idx;
 602                         ret = cb(rd);
 603                         if (ret)
 604                                 goto out;
 605                 }
 606         } else {
 607                 dev_map = dev_map_lookup(rd, false);
 608                 if (!dev_map) {
 609                         pr_err("Wrong device name - %s\n", rd_argv(rd));
 610                         ret = -ENOENT;
 611                         goto out;
 612                 }
 613                 rd_arg_inc(rd);
 614                 rd->dev_idx = dev_map->idx;
 615                 ret = cb(rd);
 616         }
 617 out:
 618         if (rd->json_output)
 619                 jsonw_end_array(rd->jw);
 620         return ret;
 621 }
 622
 623 int rd_exec_require_dev(struct rd *rd, int (*cb)(struct rd *rd))
 624 {
 625         if (rd_no_arg(rd)) {
 626                 pr_err("Please provide device name.\n");
 627                 return -EINVAL;
 628         }
 629
 630         return rd_exec_dev(rd, cb);
 631 }
 632
 633 int rd_exec_cmd(struct rd *rd, const struct rd_cmd *cmds, const char *str)
 634 {
 635         const struct rd_cmd *c;
 636
 637         /* First argument in objs table is default variant */
 638         if (rd_no_arg(rd))
 639                 return cmds->func(rd);
 640
 641         for (c = cmds + 1; c->cmd; ++c) {
 642                 if (rd_argv_match(rd, c->cmd)) {
 643                         /* Move to next argument */
 644                         rd_arg_inc(rd);
 645                         return c->func(rd);
 646                 }
 647         }
 648
 649         pr_err("Unknown %s '%s'.\n", str, rd_argv(rd));
 650         return 0;
 651 }
 652
 653 void rd_prepare_msg(struct rd *rd, uint32_t cmd, uint32_t *seq, uint16_t flags)
 654 {
 655         *seq = time(NULL);
 656
 657         rd->nlh = mnl_nlmsg_put_header(rd->buff);
 658         rd->nlh->nlmsg_type = RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, cmd);
 659         rd->nlh->nlmsg_seq = *seq;
 660         rd->nlh->nlmsg_flags = flags;
 661 }
 662
 663 int rd_send_msg(struct rd *rd)
 664 {
 665         int ret;
 666
 667         rd->nl = mnl_socket_open(NETLINK_RDMA);
 668         if (!rd->nl) {
 669                 pr_err("Failed to open NETLINK_RDMA socket\n");
 670                 return -ENODEV;
 671         }
 672
 673         ret = mnl_socket_bind(rd->nl, 0, MNL_SOCKET_AUTOPID);
 674         if (ret < 0) {
 675                 pr_err("Failed to bind socket with err %d\n", ret);
 676                 goto err;
 677         }
 678
 679         ret = mnl_socket_sendto(rd->nl, rd->nlh, rd->nlh->nlmsg_len);
 680         if (ret < 0) {
 681                 pr_err("Failed to send to socket with err %d\n", ret);
 682                 goto err;
 683         }
 684         return 0;
 685
 686 err:
 687         mnl_socket_close(rd->nl);
 688         return ret;
 689 }
 690
 691 int rd_recv_msg(struct rd *rd, mnl_cb_t callback, void *data, unsigned int seq)
 692 {
 693         int ret;
 694         unsigned int portid;
 695         char buf[MNL_SOCKET_BUFFER_SIZE];
 696
 697         portid = mnl_socket_get_portid(rd->nl);
 698         do {
 699                 ret = mnl_socket_recvfrom(rd->nl, buf, sizeof(buf));
 700                 if (ret <= 0)
 701                         break;
 702
 703                 ret = mnl_cb_run(buf, ret, seq, portid, callback, data);
 704         } while (ret > 0);
 705
 706         if (ret < 0 && !rd->suppress_errors)
 707                 perror("error");
 708
 709         mnl_socket_close(rd->nl);
 710         return ret;
 711 }
 712
 713 static int null_cb(const struct nlmsghdr *nlh, void *data)
 714 {
 715         return MNL_CB_OK;
 716 }
 717
 718 int rd_sendrecv_msg(struct rd *rd, unsigned int seq)
 719 {
 720         int ret;
 721
 722         ret = rd_send_msg(rd);
 723         if (!ret)
 724                 ret = rd_recv_msg(rd, null_cb, rd, seq);
 725         return ret;
 726 }
 727
 728 static struct dev_map *_dev_map_lookup(struct rd *rd, const char *dev_name)
 729 {
 730         struct dev_map *dev_map;
 731
 732         list_for_each_entry(dev_map, &rd->dev_map_list, list)
 733                 if (strcmp(dev_name, dev_map->dev_name) == 0)
 734                         return dev_map;
 735
 736         return NULL;
 737 }
 738
 739 struct dev_map *dev_map_lookup(struct rd *rd, bool allow_port_index)
 740 {
 741         struct dev_map *dev_map;
 742         char *dev_name;
 743         char *slash;
 744
 745         if (rd_no_arg(rd))
 746                 return NULL;
 747
 748         dev_name = strdup(rd_argv(rd));
 749         if (allow_port_index) {
 750                 slash = strrchr(dev_name, '/');
 751                 if (slash)
 752                         *slash = '\0';
 753         }
 754
 755         dev_map = _dev_map_lookup(rd, dev_name);
 756         free(dev_name);
 757         return dev_map;
 758 }
 759
 760 #define nla_type(attr) ((attr)->nla_type & NLA_TYPE_MASK)
 761
 762 void newline(struct rd *rd)
 763 {
 764         if (rd->json_output)
 765                 jsonw_end_array(rd->jw);
 766         else
 767                 pr_out("\n");
 768 }
 769
 770 void newline_indent(struct rd *rd)
 771 {
 772         newline(rd);
 773         if (!rd->json_output)
 774                 pr_out("    ");
 775 }
 776
 777 static int print_driver_string(struct rd *rd, const char *key_str,
 778                                  const char *val_str)
 779 {
 780         if (rd->json_output) {
 781                 jsonw_string_field(rd->jw, key_str, val_str);
 782                 return 0;
 783         } else {
 784                 return pr_out("%s %s ", key_str, val_str);
 785         }
 786 }
 787
 788 static int print_driver_s32(struct rd *rd, const char *key_str, int32_t val,
 789                               enum rdma_nldev_print_type print_type)
 790 {
 791         if (rd->json_output) {
 792                 jsonw_int_field(rd->jw, key_str, val);
 793                 return 0;
 794         }
 795         switch (print_type) {
 796         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 797                 return pr_out("%s %d ", key_str, val);
 798         case RDMA_NLDEV_PRINT_TYPE_HEX:
 799                 return pr_out("%s 0x%x ", key_str, val);
 800         default:
 801                 return -EINVAL;
 802         }
 803 }
 804
 805 static int print_driver_u32(struct rd *rd, const char *key_str, uint32_t val,
 806                               enum rdma_nldev_print_type print_type)
 807 {
 808         if (rd->json_output) {
 809                 jsonw_int_field(rd->jw, key_str, val);
 810                 return 0;
 811         }
 812         switch (print_type) {
 813         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 814                 return pr_out("%s %u ", key_str, val);
 815         case RDMA_NLDEV_PRINT_TYPE_HEX:
 816                 return pr_out("%s 0x%x ", key_str, val);
 817         default:
 818                 return -EINVAL;
 819         }
 820 }
 821
 822 static int print_driver_s64(struct rd *rd, const char *key_str, int64_t val,
 823                               enum rdma_nldev_print_type print_type)
 824 {
 825         if (rd->json_output) {
 826                 jsonw_int_field(rd->jw, key_str, val);
 827                 return 0;
 828         }
 829         switch (print_type) {
 830         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 831                 return pr_out("%s %" PRId64 " ", key_str, val);
 832         case RDMA_NLDEV_PRINT_TYPE_HEX:
 833                 return pr_out("%s 0x%" PRIx64 " ", key_str, val);
 834         default:
 835                 return -EINVAL;
 836         }
 837 }
 838
 839 static int print_driver_u64(struct rd *rd, const char *key_str, uint64_t val,
 840                               enum rdma_nldev_print_type print_type)
 841 {
 842         if (rd->json_output) {
 843                 jsonw_int_field(rd->jw, key_str, val);
 844                 return 0;
 845         }
 846         switch (print_type) {
 847         case RDMA_NLDEV_PRINT_TYPE_UNSPEC:
 848                 return pr_out("%s %" PRIu64 " ", key_str, val);
 849         case RDMA_NLDEV_PRINT_TYPE_HEX:
 850                 return pr_out("%s 0x%" PRIx64 " ", key_str, val);
 851         default:
 852                 return -EINVAL;
 853         }
 854 }
 855
 856 static int print_driver_entry(struct rd *rd, struct nlattr *key_attr,
 857                                 struct nlattr *val_attr,
 858                                 enum rdma_nldev_print_type print_type)
 859 {
 860         int attr_type = nla_type(val_attr);
 861         int ret = -EINVAL;
 862         char *key_str;
 863
 864         if (asprintf(&key_str, "drv_%s", mnl_attr_get_str(key_attr)) == -1)
 865                 return -ENOMEM;
 866
 867         switch (attr_type) {
 868         case RDMA_NLDEV_ATTR_DRIVER_STRING:
 869                 ret = print_driver_string(rd, key_str,
 870                                           mnl_attr_get_str(val_attr));
 871                 break;
 872         case RDMA_NLDEV_ATTR_DRIVER_S32:
 873                 ret = print_driver_s32(rd, key_str, mnl_attr_get_u32(val_attr),
 874                                        print_type);
 875                 break;
 876         case RDMA_NLDEV_ATTR_DRIVER_U32:
 877                 ret = print_driver_u32(rd, key_str, mnl_attr_get_u32(val_attr),
 878                                        print_type);
 879                 break;
 880         case RDMA_NLDEV_ATTR_DRIVER_S64:
 881                 ret = print_driver_s64(rd, key_str, mnl_attr_get_u64(val_attr),
 882                                        print_type);
 883                 break;
 884         case RDMA_NLDEV_ATTR_DRIVER_U64:
 885                 ret = print_driver_u64(rd, key_str, mnl_attr_get_u64(val_attr),
 886                                        print_type);
 887                 break;
 888         }
 889         free(key_str);
 890         return ret;
 891 }
 892
 893 void print_driver_table(struct rd *rd, struct nlattr *tb)
 894 {
 895         int print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
 896         struct nlattr *tb_entry, *key = NULL, *val;
 897         int type, cc = 0;
 898         int ret;
 899
 900         if (!rd->show_driver_details || !tb)
 901                 return;
 902
 903         if (rd->pretty_output)
 904                 newline_indent(rd);
 905
 906         /*
 907          * Driver attrs are tuples of {key, [print-type], value}.
 908          * The key must be a string.  If print-type is present, it
 909          * defines an alternate printf format type vs the native format
 910          * for the attribute.  And the value can be any available
 911          * driver type.
 912          */
 913         mnl_attr_for_each_nested(tb_entry, tb) {
 914
 915                 if (cc > MAX_LINE_LENGTH) {
 916                         if (rd->pretty_output)
 917                                 newline_indent(rd);
 918                         cc = 0;
 919                 }
 920                 if (rd_attr_check(tb_entry, &type) != MNL_CB_OK)
 921                         return;
 922                 if (!key) {
 923                         if (type != MNL_TYPE_NUL_STRING)
 924                                 return;
 925                         key = tb_entry;
 926                 } else if (type == MNL_TYPE_U8) {
 927                         print_type = mnl_attr_get_u8(tb_entry);
 928                 } else {
 929                         val = tb_entry;
 930                         ret = print_driver_entry(rd, key, val, print_type);
 931                         if (ret < 0)
 932                                 return;
 933                         cc += ret;
 934                         print_type = RDMA_NLDEV_PRINT_TYPE_UNSPEC;
 935                         key = NULL;
 936                 }
 937         }
 938         return;
 939 }