lustre/obdclass/obd_sysfs.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/obdclass/obd_sysfs.c
  32  *
  33  * Object Devices Class Driver
  34  * These are the only exported functions, they provide some generic
  35  * infrastructure for managing object devices
  36  */
  37
  38 #define DEBUG_SUBSYSTEM S_CLASS
  39
  40 #include <linux/module.h>
  41 #include <linux/errno.h>
  42 #include <linux/kernel.h>
  43 #include <linux/sched.h>
  44 #include <linux/lp.h>
  45 #include <linux/slab.h>
  46 #include <linux/ioport.h>
  47 #include <linux/fcntl.h>
  48 #include <linux/delay.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/proc_fs.h>
  51 #include <linux/fs.h>
  52 #include <linux/poll.h>
  53 #include <linux/init.h>
  54 #include <linux/list.h>
  55 #include <linux/highmem.h>
  56 #include <asm/io.h>
  57 #include <asm/ioctls.h>
  58 #include <asm/poll.h>
  59 #include <asm/uaccess.h>
  60 #include <linux/miscdevice.h>
  61 #include <linux/seq_file.h>
  62 #include <linux/kobject.h>
  63
  64 #include <libcfs/libcfs.h>
  65 #include <libcfs/libcfs_crypto.h>
  66 #include <obd_support.h>
  67 #include <obd_class.h>
  68 #include <lprocfs_status.h>
  69 #include <uapi/linux/lnet/lnetctl.h>
  70 #include <uapi/linux/lustre/lustre_ioctl.h>
  71 #include <uapi/linux/lustre/lustre_ver.h>
  72
  73 struct static_lustre_uintvalue_attr {
  74         struct {
  75                 struct attribute attr;
  76                 ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
  77                                 char *buf);
  78                 ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
  79                                  const char *buf, size_t len);
  80         } u;
  81         int *value;
  82 };
  83
  84 static ssize_t static_uintvalue_show(struct kobject *kobj,
  85                                      struct attribute *attr,
  86                                      char *buf)
  87 {
  88         struct static_lustre_uintvalue_attr *lattr = (void *)attr;
  89
  90         return sprintf(buf, "%d\n", *lattr->value);
  91 }
  92
  93 static ssize_t static_uintvalue_store(struct kobject *kobj,
  94                                       struct attribute *attr,
  95                                       const char *buffer, size_t count)
  96 {
  97         struct static_lustre_uintvalue_attr *lattr = (void *)attr;
  98         unsigned int val;
  99         int rc;
 100
 101         rc = kstrtouint(buffer, 10, &val);
 102         if (rc)
 103                 return rc;
 104
 105         *lattr->value = val;
 106
 107         return count;
 108 }
 109
 110 #define LUSTRE_STATIC_UINT_ATTR(name, value)                            \
 111 static struct static_lustre_uintvalue_attr lustre_sattr_##name =        \
 112         { __ATTR(name, 0644, static_uintvalue_show,                     \
 113                  static_uintvalue_store), value }
 114
 115 LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
 116 LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
 117 LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
 118 LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
 119 LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
 120 LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
 121 LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
 122 LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
 123 LUSTRE_STATIC_UINT_ATTR(enable_stats_header, &obd_enable_stats_header);
 124 LUSTRE_STATIC_UINT_ATTR(lbug_on_eviction, &obd_lbug_on_eviction);
 125 LUSTRE_STATIC_UINT_ATTR(ping_interval, &ping_interval);
 126 LUSTRE_STATIC_UINT_ATTR(evict_multiplier, &ping_evict_timeout_multiplier);
 127
 128 #ifdef HAVE_SERVER_SUPPORT
 129 LUSTRE_STATIC_UINT_ATTR(ldlm_timeout, &ldlm_timeout);
 130 LUSTRE_STATIC_UINT_ATTR(bulk_timeout, &bulk_timeout);
 131 #endif
 132
 133 static ssize_t memused_show(struct kobject *kobj, struct attribute *attr,
 134                             char *buf)
 135 {
 136         return sprintf(buf, "%llu\n", obd_memory_sum());
 137 }
 138 LUSTRE_RO_ATTR(memused);
 139
 140 static ssize_t memused_max_show(struct kobject *kobj, struct attribute *attr,
 141                                 char *buf)
 142 {
 143         return sprintf(buf, "%llu\n", obd_memory_max());
 144 }
 145 LUSTRE_RO_ATTR(memused_max);
 146
 147 static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr,
 148                                  char *buf)
 149 {
 150         return sprintf(buf, "%lu\n",
 151                        obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT)));
 152 }
 153
 154 static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr,
 155                                   const char *buffer, size_t count)
 156 {
 157         unsigned long val;
 158         int rc;
 159
 160         rc = kstrtoul(buffer, 10, &val);
 161         if (rc)
 162                 return rc;
 163
 164         val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */
 165
 166         if (val > ((cfs_totalram_pages() / 10) * 9)) {
 167                 /* Somebody wants to assign too much memory to dirty pages */
 168                 return -EINVAL;
 169         }
 170
 171         if (val < 4 << (20 - PAGE_SHIFT)) {
 172                 /* Less than 4 Mb for dirty cache is also bad */
 173                 return -EINVAL;
 174         }
 175
 176         obd_max_dirty_pages = val;
 177
 178         return count;
 179 }
 180 LUSTRE_RW_ATTR(max_dirty_mb);
 181
 182 #ifdef HAVE_SERVER_SUPPORT
 183 static ssize_t no_transno_store(struct kobject *kobj,
 184                                 struct attribute *attr,
 185                                 const char *buffer, size_t count)
 186 {
 187         struct obd_device *obd;
 188         unsigned int idx;
 189         int rc;
 190
 191         rc = kstrtouint(buffer, 10, &idx);
 192         if (rc)
 193                 return rc;
 194
 195         obd = class_num2obd(idx);
 196         if (!obd || !obd->obd_attached) {
 197                 if (obd)
 198                         CERROR("%s: not attached\n", obd->obd_name);
 199                 return -ENODEV;
 200         }
 201
 202         spin_lock(&obd->obd_dev_lock);
 203         obd->obd_no_transno = 1;
 204         spin_unlock(&obd->obd_dev_lock);
 205         return count;
 206 }
 207 LUSTRE_WO_ATTR(no_transno);
 208 #endif /* HAVE_SERVER_SUPPORT */
 209
 210 static ssize_t version_show(struct kobject *kobj, struct attribute *attr,
 211                             char *buf)
 212 {
 213         return sprintf(buf, "%s\n", LUSTRE_VERSION_STRING);
 214 }
 215
 216 static ssize_t pinger_show(struct kobject *kobj, struct attribute *attr,
 217                            char *buf)
 218 {
 219 #ifdef CONFIG_LUSTRE_FS_PINGER
 220         const char *state = "on";
 221 #else
 222         const char *state = "off";
 223 #endif
 224         return sprintf(buf, "%s\n", state);
 225 }
 226
 227 /**
 228  * Check all obd devices health
 229  *
 230  * \param kobj
 231  * \param buf [in]
 232  *
 233  * \retval number of characters printed if healthy
 234  */
 235 static ssize_t
 236 health_check_show(struct kobject *kobj, struct attribute *attr, char *buf)
 237 {
 238         bool healthy = true;
 239         size_t len = 0;
 240         int i;
 241
 242         if (libcfs_catastrophe)
 243                 return sprintf(buf, "LBUG\n");
 244
 245         read_lock(&obd_dev_lock);
 246         for (i = 0; i < class_devno_max(); i++) {
 247                 struct obd_device *obd;
 248
 249                 obd = class_num2obd(i);
 250                 if (obd == NULL || !obd->obd_attached || !obd->obd_set_up)
 251                         continue;
 252
 253                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 254                 if (obd->obd_stopping)
 255                         continue;
 256
 257                 if (obd->obd_read_only)
 258                         continue;
 259
 260                 class_incref(obd, __func__, current);
 261                 read_unlock(&obd_dev_lock);
 262
 263                 if (obd_health_check(NULL, obd))
 264                         healthy = false;
 265
 266                 class_decref(obd, __func__, current);
 267                 read_lock(&obd_dev_lock);
 268
 269                 if (!healthy)
 270                         break;
 271         }
 272         read_unlock(&obd_dev_lock);
 273
 274         if (healthy)
 275                 len = sprintf(buf, "healthy\n");
 276         else
 277                 len = sprintf(buf, "NOT HEALTHY\n");
 278
 279         return len;
 280 }
 281
 282 static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
 283                               char *buf)
 284 {
 285         int rc = 0;
 286
 287         if (strlen(obd_jobid_var))
 288                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
 289         return rc;
 290 }
 291
 292 static ssize_t jobid_var_store(struct kobject *kobj, struct attribute *attr,
 293                                const char *buffer, size_t count)
 294 {
 295         if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
 296                 return -EINVAL;
 297
 298         memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 299
 300         memcpy(obd_jobid_var, buffer, count);
 301
 302         /* Trim the trailing '\n' if any */
 303         if (obd_jobid_var[count - 1] == '\n')
 304                 obd_jobid_var[count - 1] = 0;
 305
 306         return count;
 307 }
 308
 309 static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
 310                                char *buf)
 311 {
 312         int rc = 0;
 313
 314         if (strlen(obd_jobid_name))
 315                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
 316         return rc;
 317 }
 318
 319 static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
 320                                 const char *buffer, size_t count)
 321 {
 322         if (!count || count > LUSTRE_JOBID_SIZE)
 323                 return -EINVAL;
 324
 325         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) != 0 &&
 326             !strchr(buffer, '%')) {
 327                 lustre_jobid_clear(buffer);
 328                 return count;
 329         }
 330
 331         /* clear previous value */
 332         memset(obd_jobid_name, 0, LUSTRE_JOBID_SIZE);
 333
 334         memcpy(obd_jobid_name, buffer, count);
 335
 336         /* Trim the trailing '\n' if any */
 337         if (obd_jobid_name[count - 1] == '\n') {
 338                 /* Don't echo just a newline */
 339                 if (count == 1)
 340                         return -EINVAL;
 341                 obd_jobid_name[count - 1] = 0;
 342         }
 343
 344         return count;
 345 }
 346
 347 static ssize_t jobid_this_session_show(struct kobject *kobj,
 348                                        struct attribute *attr,
 349                                        char *buf)
 350 {
 351         char *jid;
 352         int ret = -ENOENT;
 353
 354         rcu_read_lock();
 355         jid = jobid_current();
 356         if (jid)
 357                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", jid);
 358         rcu_read_unlock();
 359         return ret;
 360 }
 361
 362 static ssize_t jobid_this_session_store(struct kobject *kobj,
 363                                         struct attribute *attr,
 364                                         const char *buffer,
 365                                         size_t count)
 366 {
 367         char *jobid;
 368         int len;
 369         int ret;
 370
 371         if (!count || count > LUSTRE_JOBID_SIZE)
 372                 return -EINVAL;
 373
 374         jobid = kstrndup(buffer, count, GFP_KERNEL);
 375         if (!jobid)
 376                 return -ENOMEM;
 377         len = strcspn(jobid, "\n ");
 378         jobid[len] = '\0';
 379         ret = jobid_set_current(jobid);
 380         kfree(jobid);
 381
 382         return ret ?: count;
 383 }
 384
 385 static ssize_t timeout_show(struct kobject *kobj,
 386                             struct attribute *attr,
 387                             char *buf)
 388 {
 389         return sprintf(buf, "%u\n", obd_timeout);
 390 }
 391
 392 static ssize_t timeout_store(struct kobject *kobj,
 393                              struct attribute *attr,
 394                              const char *buffer,
 395                              size_t count)
 396 {
 397         unsigned int val;
 398         int rc;
 399
 400         rc = kstrtouint(buffer, 10, &val);
 401         if (rc)
 402                 return rc;
 403         obd_timeout = val ?: 1U;
 404         ping_interval = max(obd_timeout / 4, 1U);
 405
 406         return count;
 407 }
 408
 409 /* Root for /sys/kernel/debug/lustre */
 410 struct dentry *debugfs_lustre_root;
 411 EXPORT_SYMBOL_GPL(debugfs_lustre_root);
 412
 413 #ifdef CONFIG_PROC_FS
 414 /* Root for /proc/fs/lustre */
 415 struct proc_dir_entry *proc_lustre_root;
 416 EXPORT_SYMBOL(proc_lustre_root);
 417 #else
 418 #define lprocfs_base NULL
 419 #endif /* CONFIG_PROC_FS */
 420
 421 LUSTRE_RO_ATTR(version);
 422 LUSTRE_RO_ATTR(pinger);
 423 LUSTRE_RO_ATTR(health_check);
 424 LUSTRE_RW_ATTR(jobid_var);
 425 LUSTRE_RW_ATTR(jobid_name);
 426 LUSTRE_RW_ATTR(jobid_this_session);
 427 LUSTRE_RW_ATTR(timeout);
 428
 429 static struct attribute *lustre_attrs[] = {
 430         &lustre_attr_version.attr,
 431         &lustre_attr_pinger.attr,
 432         &lustre_sattr_enable_stats_header.u.attr,
 433         &lustre_attr_health_check.attr,
 434         &lustre_attr_jobid_name.attr,
 435         &lustre_attr_jobid_var.attr,
 436         &lustre_attr_jobid_this_session.attr,
 437         &lustre_attr_timeout.attr,
 438         &lustre_attr_max_dirty_mb.attr,
 439         &lustre_sattr_debug_peer_on_timeout.u.attr,
 440         &lustre_sattr_dump_on_timeout.u.attr,
 441         &lustre_sattr_dump_on_eviction.u.attr,
 442         &lustre_sattr_at_min.u.attr,
 443         &lustre_sattr_at_max.u.attr,
 444         &lustre_sattr_at_extra.u.attr,
 445         &lustre_sattr_at_early_margin.u.attr,
 446         &lustre_sattr_at_history.u.attr,
 447         &lustre_attr_memused_max.attr,
 448         &lustre_attr_memused.attr,
 449 #ifdef HAVE_SERVER_SUPPORT
 450         &lustre_sattr_ldlm_timeout.u.attr,
 451         &lustre_sattr_bulk_timeout.u.attr,
 452         &lustre_attr_no_transno.attr,
 453 #endif
 454         &lustre_sattr_lbug_on_eviction.u.attr,
 455         &lustre_sattr_ping_interval.u.attr,
 456         &lustre_sattr_evict_multiplier.u.attr,
 457         NULL,
 458 };
 459
 460 static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
 461 {
 462         if (*pos >= class_devno_max())
 463                 return NULL;
 464
 465         return pos;
 466 }
 467
 468 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 469 {
 470 }
 471
 472 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 473 {
 474         ++*pos;
 475         if (*pos >= class_devno_max())
 476                 return NULL;
 477
 478         return pos;
 479 }
 480
 481 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 482 {
 483         loff_t index = *(loff_t *)v;
 484         struct obd_device *obd = class_num2obd((int)index);
 485         char *status;
 486
 487         if (obd == NULL)
 488                 return 0;
 489
 490         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 491         if (obd->obd_stopping)
 492                 status = "ST";
 493         else if (obd->obd_inactive)
 494                 status = "IN";
 495         else if (obd->obd_set_up)
 496                 status = "UP";
 497         else if (obd->obd_attached)
 498                 status = "AT";
 499         else
 500                 status = "--";
 501
 502         seq_printf(p, "%3d %s %s %s %s %d\n",
 503                    (int)index, status, obd->obd_type->typ_name,
 504                    obd->obd_name, obd->obd_uuid.uuid,
 505                    atomic_read(&obd->obd_refcount));
 506         return 0;
 507 }
 508
 509 static const struct seq_operations obd_device_list_sops = {
 510         .start = obd_device_list_seq_start,
 511         .stop = obd_device_list_seq_stop,
 512         .next = obd_device_list_seq_next,
 513         .show = obd_device_list_seq_show,
 514 };
 515
 516 static int obd_device_list_open(struct inode *inode, struct file *file)
 517 {
 518         struct seq_file *seq;
 519         int rc = seq_open(file, &obd_device_list_sops);
 520
 521         if (rc)
 522                 return rc;
 523
 524         seq = file->private_data;
 525         seq->private = inode->i_private;
 526         return 0;
 527 }
 528
 529 static const struct file_operations obd_device_list_fops = {
 530         .owner   = THIS_MODULE,
 531         .open    = obd_device_list_open,
 532         .read    = seq_read,
 533         .llseek  = seq_lseek,
 534         .release = seq_release,
 535 };
 536
 537 /* checksum_speed */
 538 static void *checksum_speed_start(struct seq_file *p, loff_t *pos)
 539 {
 540         return pos;
 541 }
 542
 543 static void checksum_speed_stop(struct seq_file *p, void *v)
 544 {
 545 }
 546
 547 static void *checksum_speed_next(struct seq_file *p, void *v, loff_t *pos)
 548 {
 549         ++(*pos);
 550         if (*pos >= CFS_HASH_ALG_SPEED_MAX - 1)
 551                 return NULL;
 552
 553         return pos;
 554 }
 555
 556 static int checksum_speed_show(struct seq_file *p, void *v)
 557 {
 558         loff_t index = *(loff_t *)v;
 559
 560         if (!index || index > CFS_HASH_ALG_SPEED_MAX - 1)
 561                 return 0;
 562
 563         seq_printf(p, "%s: %d\n", cfs_crypto_hash_name(index),
 564                    cfs_crypto_hash_speeds[index]);
 565
 566         return 0;
 567 }
 568
 569 static const struct seq_operations checksum_speed_sops = {
 570         .start = checksum_speed_start,
 571         .stop = checksum_speed_stop,
 572         .next = checksum_speed_next,
 573         .show = checksum_speed_show,
 574 };
 575
 576 static int checksum_speed_open(struct inode *inode, struct file *file)
 577 {
 578         int rc = seq_open(file, &checksum_speed_sops);
 579
 580         if (rc)
 581                 return rc;
 582
 583         return 0;
 584 }
 585
 586 static const struct file_operations checksum_speed_fops = {
 587         .owner   = THIS_MODULE,
 588         .open    = checksum_speed_open,
 589         .read    = seq_read,
 590         .llseek  = seq_lseek,
 591         .release = seq_release,
 592 };
 593
 594 static int
 595 health_check_seq_show(struct seq_file *m, void *unused)
 596 {
 597         int i;
 598
 599         read_lock(&obd_dev_lock);
 600         for (i = 0; i < class_devno_max(); i++) {
 601                 struct obd_device *obd;
 602
 603                 obd = class_num2obd(i);
 604                 if (obd == NULL || !obd->obd_attached || !obd->obd_set_up)
 605                         continue;
 606
 607                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 608                 if (obd->obd_stopping)
 609                         continue;
 610
 611                 class_incref(obd, __func__, current);
 612                 read_unlock(&obd_dev_lock);
 613
 614                 if (obd_health_check(NULL, obd)) {
 615                         seq_printf(m, "device %s reported unhealthy\n",
 616                                    obd->obd_name);
 617                 }
 618                 class_decref(obd, __func__, current);
 619                 read_lock(&obd_dev_lock);
 620         }
 621         read_unlock(&obd_dev_lock);
 622
 623         return 0;
 624 }
 625
 626 LDEBUGFS_SEQ_FOPS_RO(health_check);
 627
 628 struct kset *lustre_kset;
 629 EXPORT_SYMBOL_GPL(lustre_kset);
 630
 631 static struct attribute_group lustre_attr_group = {
 632         .attrs = lustre_attrs,
 633 };
 634
 635 ssize_t class_set_global(const char *param)
 636 {
 637         const char *value = strchr(param, '=') + 1;
 638         size_t off = value - param - 1;
 639         ssize_t count = -ENOENT;
 640         int i;
 641
 642         for (i = 0; lustre_attrs[i]; i++) {
 643                 if (!strncmp(lustre_attrs[i]->name, param, off)) {
 644                         count = lustre_attr_store(&lustre_kset->kobj,
 645                                                   lustre_attrs[i], value,
 646                                                   strlen(value));
 647                         break;
 648                 }
 649         }
 650         return count;
 651 }
 652
 653 int class_procfs_init(void)
 654 {
 655         struct proc_dir_entry *entry;
 656         struct dentry *file;
 657         int rc = -ENOMEM;
 658
 659         ENTRY;
 660
 661         lustre_kset = kset_create_and_add("lustre", NULL, fs_kobj);
 662         if (!lustre_kset)
 663                 goto out;
 664
 665         /* Create the files associated with this kobject */
 666         rc = sysfs_create_group(&lustre_kset->kobj, &lustre_attr_group);
 667         if (rc) {
 668                 kset_unregister(lustre_kset);
 669                 goto out;
 670         }
 671
 672         rc = jobid_cache_init();
 673         if (rc) {
 674                 kset_unregister(lustre_kset);
 675                 goto out;
 676         }
 677
 678         debugfs_lustre_root = debugfs_create_dir("lustre", NULL);
 679
 680         file = debugfs_create_file("devices", 0444, debugfs_lustre_root, NULL,
 681                                    &obd_device_list_fops);
 682
 683         file = debugfs_create_file("health_check", 0444, debugfs_lustre_root,
 684                                    NULL, &health_check_fops);
 685
 686         file = debugfs_create_file("checksum_speed", 0444, debugfs_lustre_root,
 687                                    NULL, &checksum_speed_fops);
 688
 689         entry = lprocfs_register("fs/lustre", NULL, NULL, NULL);
 690         if (IS_ERR(entry)) {
 691                 rc = PTR_ERR(entry);
 692                 CERROR("cannot create '/proc/fs/lustre': rc = %d\n", rc);
 693                 debugfs_remove_recursive(debugfs_lustre_root);
 694                 kset_unregister(lustre_kset);
 695                 goto out;
 696         }
 697
 698         proc_lustre_root = entry;
 699 out:
 700         RETURN(rc);
 701 }
 702
 703 int class_procfs_clean(void)
 704 {
 705         ENTRY;
 706
 707         debugfs_remove_recursive(debugfs_lustre_root);
 708
 709         debugfs_lustre_root = NULL;
 710         jobid_cache_fini();
 711
 712         if (proc_lustre_root)
 713                 lprocfs_remove(&proc_lustre_root);
 714
 715         sysfs_remove_group(&lustre_kset->kobj, &lustre_attr_group);
 716
 717         kset_unregister(lustre_kset);
 718
 719         RETURN(0);
 720 }