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         struct obd_device *obd = NULL;
 239         unsigned long dev_no = 0;
 240         bool healthy = true;
 241         size_t len = 0;
 242
 243         if (libcfs_catastrophe)
 244                 return sprintf(buf, "LBUG\n");
 245
 246         obd_device_lock();
 247         obd_device_for_each_cond(dev_no, obd, obd->obd_attached &&
 248                                  obd->obd_set_up && !obd->obd_stopping &&
 249                                  !obd->obd_read_only) {
 250                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 251
 252                 class_incref(obd, __func__, current);
 253                 obd_device_unlock();
 254                 if (obd_health_check(NULL, obd))
 255                         healthy = false;
 256                 obd_device_lock();
 257                 class_decref(obd, __func__, current);
 258
 259                 if (!healthy)
 260                         break;
 261         }
 262         obd_device_unlock();
 263
 264         if (healthy)
 265                 len = sprintf(buf, "healthy\n");
 266         else
 267                 len = sprintf(buf, "NOT HEALTHY\n");
 268
 269         return len;
 270 }
 271
 272 static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
 273                               char *buf)
 274 {
 275         int rc = 0;
 276
 277         if (strlen(obd_jobid_var))
 278                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
 279         return rc;
 280 }
 281
 282 static ssize_t jobid_var_store(struct kobject *kobj, struct attribute *attr,
 283                                const char *buffer, size_t count)
 284 {
 285         if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
 286                 return -EINVAL;
 287
 288         memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 289
 290         memcpy(obd_jobid_var, buffer, count);
 291
 292         /* Trim the trailing '\n' if any */
 293         if (obd_jobid_var[count - 1] == '\n')
 294                 obd_jobid_var[count - 1] = 0;
 295
 296         return count;
 297 }
 298
 299 static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
 300                                char *buf)
 301 {
 302         int rc = 0;
 303
 304         if (strlen(obd_jobid_name))
 305                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
 306         return rc;
 307 }
 308
 309 static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
 310                                 const char *buffer, size_t count)
 311 {
 312         if (!count || count > LUSTRE_JOBID_SIZE)
 313                 return -EINVAL;
 314
 315         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) != 0 &&
 316             !strchr(buffer, '%')) {
 317                 lustre_jobid_clear(buffer);
 318                 return count;
 319         }
 320
 321         /* clear previous value */
 322         memset(obd_jobid_name, 0, LUSTRE_JOBID_SIZE);
 323
 324         memcpy(obd_jobid_name, buffer, count);
 325
 326         /* Trim the trailing '\n' if any */
 327         if (obd_jobid_name[count - 1] == '\n') {
 328                 /* Don't echo just a newline */
 329                 if (count == 1)
 330                         return -EINVAL;
 331                 obd_jobid_name[count - 1] = 0;
 332         }
 333
 334         return count;
 335 }
 336
 337 static ssize_t jobid_this_session_show(struct kobject *kobj,
 338                                        struct attribute *attr,
 339                                        char *buf)
 340 {
 341         char *jid;
 342         int ret = -ENOENT;
 343
 344         rcu_read_lock();
 345         jid = jobid_current();
 346         if (jid)
 347                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", jid);
 348         rcu_read_unlock();
 349         return ret;
 350 }
 351
 352 static ssize_t jobid_this_session_store(struct kobject *kobj,
 353                                         struct attribute *attr,
 354                                         const char *buffer,
 355                                         size_t count)
 356 {
 357         char *jobid;
 358         int len;
 359         int ret;
 360
 361         if (!count || count > LUSTRE_JOBID_SIZE)
 362                 return -EINVAL;
 363
 364         jobid = kstrndup(buffer, count, GFP_KERNEL);
 365         if (!jobid)
 366                 return -ENOMEM;
 367         len = strcspn(jobid, "\n ");
 368         jobid[len] = '\0';
 369         ret = jobid_set_current(jobid);
 370         kfree(jobid);
 371
 372         return ret ?: count;
 373 }
 374
 375 static ssize_t timeout_show(struct kobject *kobj,
 376                             struct attribute *attr,
 377                             char *buf)
 378 {
 379         return sprintf(buf, "%u\n", obd_timeout);
 380 }
 381
 382 static ssize_t timeout_store(struct kobject *kobj,
 383                              struct attribute *attr,
 384                              const char *buffer,
 385                              size_t count)
 386 {
 387         unsigned int val;
 388         int rc;
 389
 390         rc = kstrtouint(buffer, 10, &val);
 391         if (rc)
 392                 return rc;
 393         obd_timeout = val ?: 1U;
 394         ping_interval = max(obd_timeout / 4, 1U);
 395
 396         return count;
 397 }
 398
 399 /* Root for /sys/kernel/debug/lustre */
 400 struct dentry *debugfs_lustre_root;
 401 EXPORT_SYMBOL_GPL(debugfs_lustre_root);
 402
 403 #ifdef CONFIG_PROC_FS
 404 /* Root for /proc/fs/lustre */
 405 struct proc_dir_entry *proc_lustre_root;
 406 EXPORT_SYMBOL(proc_lustre_root);
 407 #else
 408 #define lprocfs_base NULL
 409 #endif /* CONFIG_PROC_FS */
 410
 411 LUSTRE_RO_ATTR(version);
 412 LUSTRE_RO_ATTR(pinger);
 413 LUSTRE_RO_ATTR(health_check);
 414 LUSTRE_RW_ATTR(jobid_var);
 415 LUSTRE_RW_ATTR(jobid_name);
 416 LUSTRE_RW_ATTR(jobid_this_session);
 417 LUSTRE_RW_ATTR(timeout);
 418
 419 static struct attribute *lustre_attrs[] = {
 420         &lustre_attr_version.attr,
 421         &lustre_attr_pinger.attr,
 422         &lustre_sattr_enable_stats_header.u.attr,
 423         &lustre_attr_health_check.attr,
 424         &lustre_attr_jobid_name.attr,
 425         &lustre_attr_jobid_var.attr,
 426         &lustre_attr_jobid_this_session.attr,
 427         &lustre_attr_timeout.attr,
 428         &lustre_attr_max_dirty_mb.attr,
 429         &lustre_sattr_debug_peer_on_timeout.u.attr,
 430         &lustre_sattr_dump_on_timeout.u.attr,
 431         &lustre_sattr_dump_on_eviction.u.attr,
 432         &lustre_sattr_at_min.u.attr,
 433         &lustre_sattr_at_max.u.attr,
 434         &lustre_sattr_at_extra.u.attr,
 435         &lustre_sattr_at_early_margin.u.attr,
 436         &lustre_sattr_at_history.u.attr,
 437         &lustre_attr_memused_max.attr,
 438         &lustre_attr_memused.attr,
 439 #ifdef HAVE_SERVER_SUPPORT
 440         &lustre_sattr_ldlm_timeout.u.attr,
 441         &lustre_sattr_bulk_timeout.u.attr,
 442         &lustre_attr_no_transno.attr,
 443 #endif
 444         &lustre_sattr_lbug_on_eviction.u.attr,
 445         &lustre_sattr_ping_interval.u.attr,
 446         &lustre_sattr_evict_multiplier.u.attr,
 447         NULL,
 448 };
 449
 450 static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
 451 {
 452         struct obd_device *obd;
 453         unsigned long devno;
 454
 455         devno = *pos;
 456         obd_device_lock();
 457         obd = obd_device_find(devno);
 458
 459         if (!obd) {
 460                 obd_device_unlock();
 461                 return NULL;
 462         }
 463
 464         *pos = devno;
 465         class_incref(obd, "obd_device_list_seq", obd);
 466         obd_device_unlock();
 467
 468         return obd;
 469 }
 470
 471 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 472 {
 473         struct obd_device *obd = v;
 474
 475         if (!obd)
 476                 return;
 477
 478         obd_device_lock();
 479         class_decref(obd, "obd_device_list_seq", obd);
 480         obd_device_unlock();
 481 }
 482
 483 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 484 {
 485         struct obd_device *obd = v;
 486         unsigned long devno;
 487
 488         obd_device_lock();
 489         class_decref(obd, "obd_device_list_seq", obd);
 490         devno = *pos;
 491         obd = obd_device_find_after(devno);
 492
 493         if (!obd) {
 494                 (*pos)++;
 495                 obd_device_unlock();
 496                 return NULL;
 497         }
 498
 499         *pos = devno;
 500         class_incref(obd, "obd_device_list_seq", obd);
 501         obd_device_unlock();
 502
 503         return obd;
 504 }
 505
 506 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 507 {
 508         struct obd_device *obd = v;
 509         int dev_no = obd->obd_minor;
 510         char *status;
 511
 512         if (!obd)
 513                 return 0;
 514
 515         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 516
 517         if (obd->obd_stopping)
 518                 status = "ST";
 519         else if (obd->obd_inactive)
 520                 status = "IN";
 521         else if (obd->obd_set_up)
 522                 status = "UP";
 523         else if (obd->obd_attached)
 524                 status = "AT";
 525         else
 526                 status = "--";
 527
 528         seq_printf(p, "%3d %s %s %s %s %d\n",
 529                    dev_no, status, obd->obd_type->typ_name,
 530                    obd->obd_name, obd->obd_uuid.uuid,
 531                    kref_read(&obd->obd_refcount));
 532
 533         return 0;
 534 }
 535
 536 static const struct seq_operations obd_device_list_sops = {
 537         .start = obd_device_list_seq_start,
 538         .stop = obd_device_list_seq_stop,
 539         .next = obd_device_list_seq_next,
 540         .show = obd_device_list_seq_show,
 541 };
 542
 543 static int obd_device_list_open(struct inode *inode, struct file *file)
 544 {
 545         struct seq_file *seq;
 546         int rc = seq_open(file, &obd_device_list_sops);
 547
 548         if (rc)
 549                 return rc;
 550
 551         seq = file->private_data;
 552         seq->private = inode->i_private;
 553         return 0;
 554 }
 555
 556 static const struct file_operations obd_device_list_fops = {
 557         .owner   = THIS_MODULE,
 558         .open    = obd_device_list_open,
 559         .read    = seq_read,
 560         .llseek  = seq_lseek,
 561         .release = seq_release,
 562 };
 563
 564 /* checksum_speed */
 565 static void *checksum_speed_start(struct seq_file *p, loff_t *pos)
 566 {
 567         return pos;
 568 }
 569
 570 static void checksum_speed_stop(struct seq_file *p, void *v)
 571 {
 572 }
 573
 574 static void *checksum_speed_next(struct seq_file *p, void *v, loff_t *pos)
 575 {
 576         ++(*pos);
 577         if (*pos >= CFS_HASH_ALG_SPEED_MAX - 1)
 578                 return NULL;
 579
 580         return pos;
 581 }
 582
 583 static int checksum_speed_show(struct seq_file *p, void *v)
 584 {
 585         loff_t index = *(loff_t *)v;
 586
 587         if (!index || index > CFS_HASH_ALG_SPEED_MAX - 1)
 588                 return 0;
 589
 590         seq_printf(p, "%s: %d\n", cfs_crypto_hash_name(index),
 591                    cfs_crypto_hash_speeds[index]);
 592
 593         return 0;
 594 }
 595
 596 static const struct seq_operations checksum_speed_sops = {
 597         .start = checksum_speed_start,
 598         .stop = checksum_speed_stop,
 599         .next = checksum_speed_next,
 600         .show = checksum_speed_show,
 601 };
 602
 603 static int checksum_speed_open(struct inode *inode, struct file *file)
 604 {
 605         int rc = seq_open(file, &checksum_speed_sops);
 606
 607         if (rc)
 608                 return rc;
 609
 610         return 0;
 611 }
 612
 613 static const struct file_operations checksum_speed_fops = {
 614         .owner   = THIS_MODULE,
 615         .open    = checksum_speed_open,
 616         .read    = seq_read,
 617         .llseek  = seq_lseek,
 618         .release = seq_release,
 619 };
 620
 621 static int
 622 health_check_seq_show(struct seq_file *m, void *unused)
 623 {
 624         struct obd_device *obd = NULL;
 625         unsigned long dev_no = 0;
 626
 627         obd_device_lock();
 628         obd_device_for_each_cond(dev_no, obd, obd->obd_attached &&
 629                                  obd->obd_set_up && !obd->obd_stopping) {
 630                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 631
 632                 class_incref(obd, __func__, current);
 633                 obd_device_unlock();
 634                 if (obd_health_check(NULL, obd)) {
 635                         seq_printf(m, "device %s reported unhealthy\n",
 636                                    obd->obd_name);
 637                 }
 638                 obd_device_lock();
 639                 class_decref(obd, __func__, current);
 640         }
 641         obd_device_unlock();
 642
 643         return 0;
 644 }
 645
 646 LDEBUGFS_SEQ_FOPS_RO(health_check);
 647
 648 struct kset *lustre_kset;
 649 EXPORT_SYMBOL_GPL(lustre_kset);
 650
 651 static struct attribute_group lustre_attr_group = {
 652         .attrs = lustre_attrs,
 653 };
 654
 655 ssize_t class_set_global(const char *param)
 656 {
 657         const char *value = strchr(param, '=') + 1;
 658         size_t off = value - param - 1;
 659         ssize_t count = -ENOENT;
 660         int i;
 661
 662         for (i = 0; lustre_attrs[i]; i++) {
 663                 if (!strncmp(lustre_attrs[i]->name, param, off)) {
 664                         count = lustre_attr_store(&lustre_kset->kobj,
 665                                                   lustre_attrs[i], value,
 666                                                   strlen(value));
 667                         break;
 668                 }
 669         }
 670         return count;
 671 }
 672
 673 int class_procfs_init(void)
 674 {
 675         struct proc_dir_entry *entry;
 676         struct dentry *file;
 677         int rc = -ENOMEM;
 678
 679         ENTRY;
 680
 681         lustre_kset = kset_create_and_add("lustre", NULL, fs_kobj);
 682         if (!lustre_kset)
 683                 goto out;
 684
 685         /* Create the files associated with this kobject */
 686         rc = sysfs_create_group(&lustre_kset->kobj, &lustre_attr_group);
 687         if (rc) {
 688                 kset_unregister(lustre_kset);
 689                 goto out;
 690         }
 691
 692         rc = jobid_cache_init();
 693         if (rc) {
 694                 kset_unregister(lustre_kset);
 695                 goto out;
 696         }
 697
 698         debugfs_lustre_root = debugfs_create_dir("lustre", NULL);
 699
 700         file = debugfs_create_file("devices", 0444, debugfs_lustre_root, NULL,
 701                                    &obd_device_list_fops);
 702
 703         file = debugfs_create_file("health_check", 0444, debugfs_lustre_root,
 704                                    NULL, &health_check_fops);
 705
 706         file = debugfs_create_file("checksum_speed", 0444, debugfs_lustre_root,
 707                                    NULL, &checksum_speed_fops);
 708
 709         entry = lprocfs_register("fs/lustre", NULL, NULL, NULL);
 710         if (IS_ERR(entry)) {
 711                 rc = PTR_ERR(entry);
 712                 CERROR("cannot create '/proc/fs/lustre': rc = %d\n", rc);
 713                 debugfs_remove_recursive(debugfs_lustre_root);
 714                 kset_unregister(lustre_kset);
 715                 goto out;
 716         }
 717
 718         proc_lustre_root = entry;
 719 out:
 720         RETURN(rc);
 721 }
 722
 723 int class_procfs_clean(void)
 724 {
 725         ENTRY;
 726
 727         debugfs_remove_recursive(debugfs_lustre_root);
 728
 729         debugfs_lustre_root = NULL;
 730         jobid_cache_fini();
 731
 732         if (proc_lustre_root)
 733                 lprocfs_remove(&proc_lustre_root);
 734
 735         sysfs_remove_group(&lustre_kset->kobj, &lustre_attr_group);
 736
 737         kset_unregister(lustre_kset);
 738
 739         RETURN(0);
 740 }