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 sprintf(page, "%d\n", rtrs_clt_get_max_reconnect_attempts(clt)); 56 } 57 58 static ssize_t max_reconnect_attempts_store(struct device *dev, 59 struct device_attribute *attr, 60 const char *buf, 61 size_t count) 62 { 63 int value; 64 int ret; 65 struct rtrs_clt *clt = container_of(dev, struct rtrs_clt, dev); 66 67 ret = kstrtoint(buf, 10, &value); 68 if (ret) { 69 rtrs_err(clt, "%s: failed to convert string '%s' to int\n", 70 attr->attr.name, buf); 71 return ret; 72 } 73 if (value > MAX_MAX_RECONN_ATT || 74 value < MIN_MAX_RECONN_ATT) { 75 rtrs_err(clt, 76 "%s: invalid range (provided: '%s', accepted: min: %d, max: %d)\n", 77 attr->attr.name, buf, MIN_MAX_RECONN_ATT, 78 MAX_MAX_RECONN_ATT); 79 return -EINVAL; 80 } 81 rtrs_clt_set_max_reconnect_attempts(clt, value); 82 83 return count; 84 } 85 86 static DEVICE_ATTR_RW(max_reconnect_attempts); 87 88 static ssize_t mpath_policy_show(struct device *dev, 89 struct device_attribute *attr, 90 char *page) 91 { 92 struct rtrs_clt *clt; 93 94 clt = container_of(dev, struct rtrs_clt, dev); 95 96 switch (clt->mp_policy) { 97 case MP_POLICY_RR: 98 return sprintf(page, "round-robin (RR: %d)\n", clt->mp_policy); 99 case MP_POLICY_MIN_INFLIGHT: 100 return sprintf(page, "min-inflight (MI: %d)\n", clt->mp_policy); 101 default: 102 return sprintf(page, "Unknown (%d)\n", clt->mp_policy); 103 } 104 } 105 106 static ssize_t mpath_policy_store(struct device *dev, 107 struct device_attribute *attr, 108 const char *buf, 109 size_t count) 110 { 111 struct rtrs_clt *clt; 112 int value; 113 int ret; 114 115 clt = container_of(dev, struct rtrs_clt, dev); 116 117 ret = kstrtoint(buf, 10, &value); 118 if (!ret && (value == MP_POLICY_RR || 119 value == MP_POLICY_MIN_INFLIGHT)) { 120 clt->mp_policy = value; 121 return count; 122 } 123 124 if (!strncasecmp(buf, "round-robin", 11) || 125 !strncasecmp(buf, "rr", 2)) 126 clt->mp_policy = MP_POLICY_RR; 127 else if (!strncasecmp(buf, "min-inflight", 12) || 128 !strncasecmp(buf, "mi", 2)) 129 clt->mp_policy = MP_POLICY_MIN_INFLIGHT; 130 else 131 return -EINVAL; 132 133 return count; 134 } 135 136 static DEVICE_ATTR_RW(mpath_policy); 137 138 static ssize_t add_path_show(struct device *dev, 139 struct device_attribute *attr, char *page) 140 { 141 return scnprintf(page, PAGE_SIZE, 142 "Usage: echo [<source addr>@]<destination addr> > %s\n\n*addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]\n", 143 attr->attr.name); 144 } 145 146 static ssize_t add_path_store(struct device *dev, 147 struct device_attribute *attr, 148 const char *buf, size_t count) 149 { 150 struct sockaddr_storage srcaddr, dstaddr; 151 struct rtrs_addr addr = { 152 .src = &srcaddr, 153 .dst = &dstaddr 154 }; 155 struct rtrs_clt *clt; 156 const char *nl; 157 size_t len; 158 int err; 159 160 clt = container_of(dev, struct rtrs_clt, dev); 161 162 nl = strchr(buf, '\n'); 163 if (nl) 164 len = nl - buf; 165 else 166 len = count; 167 err = rtrs_addr_to_sockaddr(buf, len, clt->port, &addr); 168 if (err) 169 return -EINVAL; 170 171 err = rtrs_clt_create_path_from_sysfs(clt, &addr); 172 if (err) 173 return err; 174 175 return count; 176 } 177 178 static DEVICE_ATTR_RW(add_path); 179 180 static ssize_t rtrs_clt_state_show(struct kobject *kobj, 181 struct kobj_attribute *attr, char *page) 182 { 183 struct rtrs_clt_sess *sess; 184 185 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 186 if (sess->state == RTRS_CLT_CONNECTED) 187 return sprintf(page, "connected\n"); 188 189 return sprintf(page, "disconnected\n"); 190 } 191 192 static struct kobj_attribute rtrs_clt_state_attr = 193 __ATTR(state, 0444, rtrs_clt_state_show, NULL); 194 195 static ssize_t rtrs_clt_reconnect_show(struct kobject *kobj, 196 struct kobj_attribute *attr, 197 char *page) 198 { 199 return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n", 200 attr->attr.name); 201 } 202 203 static ssize_t rtrs_clt_reconnect_store(struct kobject *kobj, 204 struct kobj_attribute *attr, 205 const char *buf, size_t count) 206 { 207 struct rtrs_clt_sess *sess; 208 int ret; 209 210 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 211 if (!sysfs_streq(buf, "1")) { 212 rtrs_err(sess->clt, "%s: unknown value: '%s'\n", 213 attr->attr.name, buf); 214 return -EINVAL; 215 } 216 ret = rtrs_clt_reconnect_from_sysfs(sess); 217 if (ret) 218 return ret; 219 220 return count; 221 } 222 223 static struct kobj_attribute rtrs_clt_reconnect_attr = 224 __ATTR(reconnect, 0644, rtrs_clt_reconnect_show, 225 rtrs_clt_reconnect_store); 226 227 static ssize_t rtrs_clt_disconnect_show(struct kobject *kobj, 228 struct kobj_attribute *attr, 229 char *page) 230 { 231 return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n", 232 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, 261 char *page) 262 { 263 return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n", 264 attr->attr.name); 265 } 266 267 static ssize_t rtrs_clt_remove_path_store(struct kobject *kobj, 268 struct kobj_attribute *attr, 269 const char *buf, size_t count) 270 { 271 struct rtrs_clt_sess *sess; 272 int ret; 273 274 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 275 if (!sysfs_streq(buf, "1")) { 276 rtrs_err(sess->clt, "%s: unknown value: '%s'\n", 277 attr->attr.name, buf); 278 return -EINVAL; 279 } 280 ret = rtrs_clt_remove_path_from_sysfs(sess, &attr->attr); 281 if (ret) 282 return ret; 283 284 return count; 285 } 286 287 static struct kobj_attribute rtrs_clt_remove_path_attr = 288 __ATTR(remove_path, 0644, rtrs_clt_remove_path_show, 289 rtrs_clt_remove_path_store); 290 291 STAT_ATTR(struct rtrs_clt_stats, cpu_migration, 292 rtrs_clt_stats_migration_cnt_to_str, 293 rtrs_clt_reset_cpu_migr_stats); 294 295 STAT_ATTR(struct rtrs_clt_stats, reconnects, 296 rtrs_clt_stats_reconnects_to_str, 297 rtrs_clt_reset_reconnects_stat); 298 299 STAT_ATTR(struct rtrs_clt_stats, rdma, 300 rtrs_clt_stats_rdma_to_str, 301 rtrs_clt_reset_rdma_stats); 302 303 STAT_ATTR(struct rtrs_clt_stats, reset_all, 304 rtrs_clt_reset_all_help, 305 rtrs_clt_reset_all_stats); 306 307 static struct attribute *rtrs_clt_stats_attrs[] = { 308 &cpu_migration_attr.attr, 309 &reconnects_attr.attr, 310 &rdma_attr.attr, 311 &reset_all_attr.attr, 312 NULL 313 }; 314 315 static struct attribute_group rtrs_clt_stats_attr_group = { 316 .attrs = rtrs_clt_stats_attrs, 317 }; 318 319 static ssize_t rtrs_clt_hca_port_show(struct kobject *kobj, 320 struct kobj_attribute *attr, 321 char *page) 322 { 323 struct rtrs_clt_sess *sess; 324 325 sess = container_of(kobj, typeof(*sess), kobj); 326 327 return scnprintf(page, PAGE_SIZE, "%u\n", sess->hca_port); 328 } 329 330 static struct kobj_attribute rtrs_clt_hca_port_attr = 331 __ATTR(hca_port, 0444, rtrs_clt_hca_port_show, NULL); 332 333 static ssize_t rtrs_clt_hca_name_show(struct kobject *kobj, 334 struct kobj_attribute *attr, 335 char *page) 336 { 337 struct rtrs_clt_sess *sess; 338 339 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 340 341 return scnprintf(page, PAGE_SIZE, "%s\n", sess->hca_name); 342 } 343 344 static struct kobj_attribute rtrs_clt_hca_name_attr = 345 __ATTR(hca_name, 0444, rtrs_clt_hca_name_show, NULL); 346 347 static ssize_t rtrs_clt_src_addr_show(struct kobject *kobj, 348 struct kobj_attribute *attr, 349 char *page) 350 { 351 struct rtrs_clt_sess *sess; 352 int cnt; 353 354 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 355 cnt = sockaddr_to_str((struct sockaddr *)&sess->s.src_addr, 356 page, PAGE_SIZE); 357 return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n"); 358 } 359 360 static struct kobj_attribute rtrs_clt_src_addr_attr = 361 __ATTR(src_addr, 0444, rtrs_clt_src_addr_show, NULL); 362 363 static ssize_t rtrs_clt_dst_addr_show(struct kobject *kobj, 364 struct kobj_attribute *attr, 365 char *page) 366 { 367 struct rtrs_clt_sess *sess; 368 int cnt; 369 370 sess = container_of(kobj, struct rtrs_clt_sess, kobj); 371 cnt = sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, 372 page, PAGE_SIZE); 373 return cnt + scnprintf(page + cnt, PAGE_SIZE - cnt, "\n"); 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 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 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 } 484