drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * RDMA Transport Layer
   4  *
   5  * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
   6  * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
   7  * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
   8  */
   9 #undef pr_fmt
  10 #define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
  11
  12 #include "rtrs-pri.h"
  13 #include "rtrs-clt.h"
  14 #include "rtrs-log.h"
  15
  16 #define MIN_MAX_RECONN_ATT -1
  17 #define MAX_MAX_RECONN_ATT 9999
  18
  19 static void rtrs_clt_sess_release(struct kobject *kobj)
  20 {
  21         struct rtrs_clt_sess *sess;
  22
  23         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
  24
  25         free_sess(sess);
  26 }
  27
  28 static struct kobj_type ktype_sess = {
  29         .sysfs_ops = &kobj_sysfs_ops,
  30         .release = rtrs_clt_sess_release
  31 };
  32
  33 static void rtrs_clt_sess_stats_release(struct kobject *kobj)
  34 {
  35         struct rtrs_clt_stats *stats;
  36
  37         stats = container_of(kobj, struct rtrs_clt_stats, kobj_stats);
  38
  39         free_percpu(stats->pcpu_stats);
  40
  41         kfree(stats);
  42 }
  43
  44 static struct kobj_type ktype_stats = {
  45         .sysfs_ops = &kobj_sysfs_ops,
  46         .release = rtrs_clt_sess_stats_release,
  47 };
  48
  49 static ssize_t max_reconnect_attempts_show(struct device *dev,
  50                                            struct device_attribute *attr,
  51                                            char *page)
  52 {
  53         struct rtrs_clt *clt = container_of(dev, struct rtrs_clt, dev);
  54
  55         return sysfs_emit(page, "%d\n",
  56                           rtrs_clt_get_max_reconnect_attempts(clt));
  57 }
  58
  59 static ssize_t max_reconnect_attempts_store(struct device *dev,
  60                                             struct device_attribute *attr,
  61                                             const char *buf,
  62                                             size_t count)
  63 {
  64         int value;
  65         int ret;
  66         struct rtrs_clt *clt  = container_of(dev, struct rtrs_clt, dev);
  67
  68         ret = kstrtoint(buf, 10, &value);
  69         if (ret) {
  70                 rtrs_err(clt, "%s: failed to convert string '%s' to int\n",
  71                           attr->attr.name, buf);
  72                 return ret;
  73         }
  74         if (value > MAX_MAX_RECONN_ATT ||
  75                      value < MIN_MAX_RECONN_ATT) {
  76                 rtrs_err(clt,
  77                           "%s: invalid range (provided: '%s', accepted: min: %d, max: %d)\n",
  78                           attr->attr.name, buf, MIN_MAX_RECONN_ATT,
  79                           MAX_MAX_RECONN_ATT);
  80                 return -EINVAL;
  81         }
  82         rtrs_clt_set_max_reconnect_attempts(clt, value);
  83
  84         return count;
  85 }
  86
  87 static DEVICE_ATTR_RW(max_reconnect_attempts);
  88
  89 static ssize_t mpath_policy_show(struct device *dev,
  90                                  struct device_attribute *attr,
  91                                  char *page)
  92 {
  93         struct rtrs_clt *clt;
  94
  95         clt = container_of(dev, struct rtrs_clt, dev);
  96
  97         switch (clt->mp_policy) {
  98         case MP_POLICY_RR:
  99                 return sysfs_emit(page, "round-robin (RR: %d)\n",
 100                                   clt->mp_policy);
 101         case MP_POLICY_MIN_INFLIGHT:
 102                 return sysfs_emit(page, "min-inflight (MI: %d)\n",
 103                                   clt->mp_policy);
 104         default:
 105                 return sysfs_emit(page, "Unknown (%d)\n", clt->mp_policy);
 106         }
 107 }
 108
 109 static ssize_t mpath_policy_store(struct device *dev,
 110                                   struct device_attribute *attr,
 111                                   const char *buf,
 112                                   size_t count)
 113 {
 114         struct rtrs_clt *clt;
 115         int value;
 116         int ret;
 117
 118         clt = container_of(dev, struct rtrs_clt, dev);
 119
 120         ret = kstrtoint(buf, 10, &value);
 121         if (!ret && (value == MP_POLICY_RR ||
 122                      value == MP_POLICY_MIN_INFLIGHT)) {
 123                 clt->mp_policy = value;
 124                 return count;
 125         }
 126
 127         if (!strncasecmp(buf, "round-robin", 11) ||
 128             !strncasecmp(buf, "rr", 2))
 129                 clt->mp_policy = MP_POLICY_RR;
 130         else if (!strncasecmp(buf, "min-inflight", 12) ||
 131                  !strncasecmp(buf, "mi", 2))
 132                 clt->mp_policy = MP_POLICY_MIN_INFLIGHT;
 133         else
 134                 return -EINVAL;
 135
 136         return count;
 137 }
 138
 139 static DEVICE_ATTR_RW(mpath_policy);
 140
 141 static ssize_t add_path_show(struct device *dev,
 142                              struct device_attribute *attr, char *page)
 143 {
 144         return sysfs_emit(
 145                 page,
 146                 "Usage: echo [<source addr>@]<destination addr> > %s\n\n*addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]\n",
 147                 attr->attr.name);
 148 }
 149
 150 static ssize_t add_path_store(struct device *dev,
 151                               struct device_attribute *attr,
 152                               const char *buf, size_t count)
 153 {
 154         struct sockaddr_storage srcaddr, dstaddr;
 155         struct rtrs_addr addr = {
 156                 .src = &srcaddr,
 157                 .dst = &dstaddr
 158         };
 159         struct rtrs_clt *clt;
 160         const char *nl;
 161         size_t len;
 162         int err;
 163
 164         clt = container_of(dev, struct rtrs_clt, dev);
 165
 166         nl = strchr(buf, '\n');
 167         if (nl)
 168                 len = nl - buf;
 169         else
 170                 len = count;
 171         err = rtrs_addr_to_sockaddr(buf, len, clt->port, &addr);
 172         if (err)
 173                 return -EINVAL;
 174
 175         err = rtrs_clt_create_path_from_sysfs(clt, &addr);
 176         if (err)
 177                 return err;
 178
 179         return count;
 180 }
 181
 182 static DEVICE_ATTR_RW(add_path);
 183
 184 static ssize_t rtrs_clt_state_show(struct kobject *kobj,
 185                                     struct kobj_attribute *attr, char *page)
 186 {
 187         struct rtrs_clt_sess *sess;
 188
 189         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 190         if (sess->state == RTRS_CLT_CONNECTED)
 191                 return sysfs_emit(page, "connected\n");
 192
 193         return sysfs_emit(page, "disconnected\n");
 194 }
 195
 196 static struct kobj_attribute rtrs_clt_state_attr =
 197         __ATTR(state, 0444, rtrs_clt_state_show, NULL);
 198
 199 static ssize_t rtrs_clt_reconnect_show(struct kobject *kobj,
 200                                        struct kobj_attribute *attr, char *buf)
 201 {
 202         return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
 203 }
 204
 205 static ssize_t rtrs_clt_reconnect_store(struct kobject *kobj,
 206                                          struct kobj_attribute *attr,
 207                                          const char *buf, size_t count)
 208 {
 209         struct rtrs_clt_sess *sess;
 210         int ret;
 211
 212         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 213         if (!sysfs_streq(buf, "1")) {
 214                 rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
 215                           attr->attr.name, buf);
 216                 return -EINVAL;
 217         }
 218         ret = rtrs_clt_reconnect_from_sysfs(sess);
 219         if (ret)
 220                 return ret;
 221
 222         return count;
 223 }
 224
 225 static struct kobj_attribute rtrs_clt_reconnect_attr =
 226         __ATTR(reconnect, 0644, rtrs_clt_reconnect_show,
 227                rtrs_clt_reconnect_store);
 228
 229 static ssize_t rtrs_clt_disconnect_show(struct kobject *kobj,
 230                                         struct kobj_attribute *attr, char *buf)
 231 {
 232         return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
 233 }
 234
 235 static ssize_t rtrs_clt_disconnect_store(struct kobject *kobj,
 236                                           struct kobj_attribute *attr,
 237                                           const char *buf, size_t count)
 238 {
 239         struct rtrs_clt_sess *sess;
 240         int ret;
 241
 242         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 243         if (!sysfs_streq(buf, "1")) {
 244                 rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
 245                           attr->attr.name, buf);
 246                 return -EINVAL;
 247         }
 248         ret = rtrs_clt_disconnect_from_sysfs(sess);
 249         if (ret)
 250                 return ret;
 251
 252         return count;
 253 }
 254
 255 static struct kobj_attribute rtrs_clt_disconnect_attr =
 256         __ATTR(disconnect, 0644, rtrs_clt_disconnect_show,
 257                rtrs_clt_disconnect_store);
 258
 259 static ssize_t rtrs_clt_remove_path_show(struct kobject *kobj,
 260                                          struct kobj_attribute *attr, char *buf)
 261 {
 262         return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
 263 }
 264
 265 static ssize_t rtrs_clt_remove_path_store(struct kobject *kobj,
 266                                            struct kobj_attribute *attr,
 267                                            const char *buf, size_t count)
 268 {
 269         struct rtrs_clt_sess *sess;
 270         int ret;
 271
 272         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 273         if (!sysfs_streq(buf, "1")) {
 274                 rtrs_err(sess->clt, "%s: unknown value: '%s'\n",
 275                           attr->attr.name, buf);
 276                 return -EINVAL;
 277         }
 278         ret = rtrs_clt_remove_path_from_sysfs(sess, &attr->attr);
 279         if (ret)
 280                 return ret;
 281
 282         return count;
 283 }
 284
 285 static struct kobj_attribute rtrs_clt_remove_path_attr =
 286         __ATTR(remove_path, 0644, rtrs_clt_remove_path_show,
 287                rtrs_clt_remove_path_store);
 288
 289 STAT_ATTR(struct rtrs_clt_stats, cpu_migration,
 290           rtrs_clt_stats_migration_cnt_to_str,
 291           rtrs_clt_reset_cpu_migr_stats);
 292
 293 STAT_ATTR(struct rtrs_clt_stats, reconnects,
 294           rtrs_clt_stats_reconnects_to_str,
 295           rtrs_clt_reset_reconnects_stat);
 296
 297 STAT_ATTR(struct rtrs_clt_stats, rdma,
 298           rtrs_clt_stats_rdma_to_str,
 299           rtrs_clt_reset_rdma_stats);
 300
 301 STAT_ATTR(struct rtrs_clt_stats, reset_all,
 302           rtrs_clt_reset_all_help,
 303           rtrs_clt_reset_all_stats);
 304
 305 static struct attribute *rtrs_clt_stats_attrs[] = {
 306         &cpu_migration_attr.attr,
 307         &reconnects_attr.attr,
 308         &rdma_attr.attr,
 309         &reset_all_attr.attr,
 310         NULL
 311 };
 312
 313 static const struct attribute_group rtrs_clt_stats_attr_group = {
 314         .attrs = rtrs_clt_stats_attrs,
 315 };
 316
 317 static ssize_t rtrs_clt_hca_port_show(struct kobject *kobj,
 318                                        struct kobj_attribute *attr,
 319                                        char *page)
 320 {
 321         struct rtrs_clt_sess *sess;
 322
 323         sess = container_of(kobj, typeof(*sess), kobj);
 324
 325         return sysfs_emit(page, "%u\n", sess->hca_port);
 326 }
 327
 328 static struct kobj_attribute rtrs_clt_hca_port_attr =
 329         __ATTR(hca_port, 0444, rtrs_clt_hca_port_show, NULL);
 330
 331 static ssize_t rtrs_clt_hca_name_show(struct kobject *kobj,
 332                                        struct kobj_attribute *attr,
 333                                        char *page)
 334 {
 335         struct rtrs_clt_sess *sess;
 336
 337         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 338
 339         return sysfs_emit(page, "%s\n", sess->hca_name);
 340 }
 341
 342 static struct kobj_attribute rtrs_clt_hca_name_attr =
 343         __ATTR(hca_name, 0444, rtrs_clt_hca_name_show, NULL);
 344
 345 static ssize_t rtrs_clt_src_addr_show(struct kobject *kobj,
 346                                        struct kobj_attribute *attr,
 347                                        char *page)
 348 {
 349         struct rtrs_clt_sess *sess;
 350         int len;
 351
 352         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 353         len = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, page,
 354                               PAGE_SIZE);
 355         len += sysfs_emit_at(page, len, "\n");
 356         return len;
 357 }
 358
 359 static struct kobj_attribute rtrs_clt_src_addr_attr =
 360         __ATTR(src_addr, 0444, rtrs_clt_src_addr_show, NULL);
 361
 362 static ssize_t rtrs_clt_dst_addr_show(struct kobject *kobj,
 363                                        struct kobj_attribute *attr,
 364                                        char *page)
 365 {
 366         struct rtrs_clt_sess *sess;
 367         int len;
 368
 369         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
 370         len = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, page,
 371                               PAGE_SIZE);
 372         len += sysfs_emit_at(page, len, "\n");
 373         return len;
 374 }
 375
 376 static struct kobj_attribute rtrs_clt_dst_addr_attr =
 377         __ATTR(dst_addr, 0444, rtrs_clt_dst_addr_show, NULL);
 378
 379 static struct attribute *rtrs_clt_sess_attrs[] = {
 380         &rtrs_clt_hca_name_attr.attr,
 381         &rtrs_clt_hca_port_attr.attr,
 382         &rtrs_clt_src_addr_attr.attr,
 383         &rtrs_clt_dst_addr_attr.attr,
 384         &rtrs_clt_state_attr.attr,
 385         &rtrs_clt_reconnect_attr.attr,
 386         &rtrs_clt_disconnect_attr.attr,
 387         &rtrs_clt_remove_path_attr.attr,
 388         NULL,
 389 };
 390
 391 static const struct attribute_group rtrs_clt_sess_attr_group = {
 392         .attrs = rtrs_clt_sess_attrs,
 393 };
 394
 395 int rtrs_clt_create_sess_files(struct rtrs_clt_sess *sess)
 396 {
 397         struct rtrs_clt *clt = sess->clt;
 398         char str[NAME_MAX];
 399         int err, cnt;
 400
 401         cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr,
 402                               str, sizeof(str));
 403         cnt += scnprintf(str + cnt, sizeof(str) - cnt, "@");
 404         sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr,
 405                         str + cnt, sizeof(str) - cnt);
 406
 407         err = kobject_init_and_add(&sess->kobj, &ktype_sess, clt->kobj_paths,
 408                                    "%s", str);
 409         if (err) {
 410                 pr_err("kobject_init_and_add: %d\n", err);
 411                 return err;
 412         }
 413         err = sysfs_create_group(&sess->kobj, &rtrs_clt_sess_attr_group);
 414         if (err) {
 415                 pr_err("sysfs_create_group(): %d\n", err);
 416                 goto put_kobj;
 417         }
 418         err = kobject_init_and_add(&sess->stats->kobj_stats, &ktype_stats,
 419                                    &sess->kobj, "stats");
 420         if (err) {
 421                 pr_err("kobject_init_and_add: %d\n", err);
 422                 goto remove_group;
 423         }
 424
 425         err = sysfs_create_group(&sess->stats->kobj_stats,
 426                                  &rtrs_clt_stats_attr_group);
 427         if (err) {
 428                 pr_err("failed to create stats sysfs group, err: %d\n", err);
 429                 goto put_kobj_stats;
 430         }
 431
 432         return 0;
 433
 434 put_kobj_stats:
 435         kobject_del(&sess->stats->kobj_stats);
 436         kobject_put(&sess->stats->kobj_stats);
 437 remove_group:
 438         sysfs_remove_group(&sess->kobj, &rtrs_clt_sess_attr_group);
 439 put_kobj:
 440         kobject_del(&sess->kobj);
 441         kobject_put(&sess->kobj);
 442
 443         return err;
 444 }
 445
 446 void rtrs_clt_destroy_sess_files(struct rtrs_clt_sess *sess,
 447                                   const struct attribute *sysfs_self)
 448 {
 449         kobject_del(&sess->stats->kobj_stats);
 450         kobject_put(&sess->stats->kobj_stats);
 451         if (sysfs_self)
 452                 sysfs_remove_file_self(&sess->kobj, sysfs_self);
 453         kobject_del(&sess->kobj);
 454 }
 455
 456 static struct attribute *rtrs_clt_attrs[] = {
 457         &dev_attr_max_reconnect_attempts.attr,
 458         &dev_attr_mpath_policy.attr,
 459         &dev_attr_add_path.attr,
 460         NULL,
 461 };
 462
 463 static const struct attribute_group rtrs_clt_attr_group = {
 464         .attrs = rtrs_clt_attrs,
 465 };
 466
 467 int rtrs_clt_create_sysfs_root_files(struct rtrs_clt *clt)
 468 {
 469         return sysfs_create_group(&clt->dev.kobj, &rtrs_clt_attr_group);
 470 }
 471
 472 void rtrs_clt_destroy_sysfs_root_folders(struct rtrs_clt *clt)
 473 {
 474         if (clt->kobj_paths) {
 475                 kobject_del(clt->kobj_paths);
 476                 kobject_put(clt->kobj_paths);
 477         }
 478 }
 479
 480 void rtrs_clt_destroy_sysfs_root_files(struct rtrs_clt *clt)
 481 {
 482         sysfs_remove_group(&clt->dev.kobj, &rtrs_clt_attr_group);
 483 }