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 bool obd_enable_health_write;
  74 EXPORT_SYMBOL(obd_enable_health_write);
  75
  76 struct static_lustre_uintvalue_attr {
  77         struct {
  78                 struct attribute attr;
  79                 ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
  80                                 char *buf);
  81                 ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
  82                                  const char *buf, size_t len);
  83         } u;
  84         int *value;
  85 };
  86
  87 static ssize_t static_uintvalue_show(struct kobject *kobj,
  88                                      struct attribute *attr,
  89                                      char *buf)
  90 {
  91         struct static_lustre_uintvalue_attr *lattr = (void *)attr;
  92
  93         return sprintf(buf, "%d\n", *lattr->value);
  94 }
  95
  96 static ssize_t static_uintvalue_store(struct kobject *kobj,
  97                                       struct attribute *attr,
  98                                       const char *buffer, size_t count)
  99 {
 100         struct static_lustre_uintvalue_attr *lattr = (void *)attr;
 101         unsigned int val;
 102         int rc;
 103
 104         rc = kstrtouint(buffer, 10, &val);
 105         if (rc)
 106                 return rc;
 107
 108         *lattr->value = val;
 109
 110         return count;
 111 }
 112
 113 #define LUSTRE_STATIC_UINT_ATTR(name, value)                            \
 114 static struct static_lustre_uintvalue_attr lustre_sattr_##name =        \
 115         { __ATTR(name, 0644, static_uintvalue_show,                     \
 116                  static_uintvalue_store), value }
 117
 118 LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
 119 LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
 120 LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
 121 LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
 122 LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
 123 LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
 124 LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
 125 LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
 126 LUSTRE_STATIC_UINT_ATTR(enable_stats_header, &obd_enable_stats_header);
 127 LUSTRE_STATIC_UINT_ATTR(lbug_on_eviction, &obd_lbug_on_eviction);
 128 LUSTRE_STATIC_UINT_ATTR(ping_interval, &ping_interval);
 129 LUSTRE_STATIC_UINT_ATTR(evict_multiplier, &ping_evict_timeout_multiplier);
 130
 131 #ifdef HAVE_SERVER_SUPPORT
 132 LUSTRE_STATIC_UINT_ATTR(ldlm_timeout, &ldlm_timeout);
 133 LUSTRE_STATIC_UINT_ATTR(bulk_timeout, &bulk_timeout);
 134 #endif
 135
 136 static ssize_t memused_show(struct kobject *kobj, struct attribute *attr,
 137                             char *buf)
 138 {
 139         return sprintf(buf, "%llu\n", obd_memory_sum());
 140 }
 141 LUSTRE_RO_ATTR(memused);
 142
 143 static ssize_t memused_max_show(struct kobject *kobj, struct attribute *attr,
 144                                 char *buf)
 145 {
 146         return sprintf(buf, "%llu\n", obd_memory_max());
 147 }
 148 LUSTRE_RO_ATTR(memused_max);
 149
 150 static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr,
 151                                  char *buf)
 152 {
 153         return sprintf(buf, "%lu\n",
 154                        obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT)));
 155 }
 156
 157 static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr,
 158                                   const char *buffer, size_t count)
 159 {
 160         unsigned long val;
 161         int rc;
 162
 163         rc = kstrtoul(buffer, 10, &val);
 164         if (rc)
 165                 return rc;
 166
 167         val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */
 168
 169         if (val > ((cfs_totalram_pages() / 10) * 9)) {
 170                 /* Somebody wants to assign too much memory to dirty pages */
 171                 return -EINVAL;
 172         }
 173
 174         if (val < 4 << (20 - PAGE_SHIFT)) {
 175                 /* Less than 4 Mb for dirty cache is also bad */
 176                 return -EINVAL;
 177         }
 178
 179         obd_max_dirty_pages = val;
 180
 181         return count;
 182 }
 183 LUSTRE_RW_ATTR(max_dirty_mb);
 184
 185 #ifdef HAVE_SERVER_SUPPORT
 186 static ssize_t no_transno_store(struct kobject *kobj,
 187                                 struct attribute *attr,
 188                                 const char *buffer, size_t count)
 189 {
 190         struct obd_device *obd;
 191         unsigned int idx;
 192         int rc;
 193
 194         rc = kstrtouint(buffer, 10, &idx);
 195         if (rc)
 196                 return rc;
 197
 198         obd = class_num2obd(idx);
 199         if (!obd || !obd->obd_attached) {
 200                 if (obd)
 201                         CERROR("%s: not attached\n", obd->obd_name);
 202                 return -ENODEV;
 203         }
 204
 205         spin_lock(&obd->obd_dev_lock);
 206         obd->obd_no_transno = 1;
 207         spin_unlock(&obd->obd_dev_lock);
 208         return count;
 209 }
 210 LUSTRE_WO_ATTR(no_transno);
 211 #endif /* HAVE_SERVER_SUPPORT */
 212
 213 static ssize_t version_show(struct kobject *kobj, struct attribute *attr,
 214                             char *buf)
 215 {
 216         return sprintf(buf, "%s\n", LUSTRE_VERSION_STRING);
 217 }
 218
 219 static ssize_t pinger_show(struct kobject *kobj, struct attribute *attr,
 220                            char *buf)
 221 {
 222 #ifdef CONFIG_LUSTRE_FS_PINGER
 223         const char *state = "on";
 224 #else
 225         const char *state = "off";
 226 #endif
 227         return sprintf(buf, "%s\n", state);
 228 }
 229
 230 /**
 231  * Check all obd devices health
 232  *
 233  * \param kobj
 234  * \param buf [in]
 235  *
 236  * \retval number of characters printed if healthy
 237  */
 238 static ssize_t
 239 health_check_show(struct kobject *kobj, struct attribute *attr, char *buf)
 240 {
 241         struct obd_device *obd = NULL;
 242         unsigned long dev_no = 0;
 243         bool healthy = true;
 244         size_t len = 0;
 245
 246         if (libcfs_catastrophe)
 247                 return sprintf(buf, "LBUG\n");
 248
 249         obd_device_lock();
 250         obd_device_for_each_cond(dev_no, obd, obd->obd_attached &&
 251                                  obd->obd_set_up && !obd->obd_stopping &&
 252                                  !obd->obd_read_only) {
 253                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 254
 255                 class_incref(obd, __func__, current);
 256                 obd_device_unlock();
 257                 if (obd_health_check(NULL, obd))
 258                         healthy = false;
 259                 obd_device_lock();
 260                 class_decref(obd, __func__, current);
 261
 262                 if (!healthy)
 263                         break;
 264         }
 265         obd_device_unlock();
 266
 267         if (healthy)
 268                 len = sprintf(buf, "healthy\n");
 269         else
 270                 len = sprintf(buf, "NOT HEALTHY\n");
 271
 272         return len;
 273 }
 274
 275 #ifdef HAVE_SERVER_SUPPORT
 276 static ssize_t enable_health_write_show(struct kobject *kobj,
 277                                         struct attribute *attr,
 278                                         char *buf)
 279 {
 280         return scnprintf(buf, PAGE_SIZE, "%u\n",
 281                          obd_enable_health_write);
 282 }
 283
 284 static ssize_t enable_health_write_store(struct kobject *kobj,
 285                                          struct attribute *attr,
 286                                          const char *buf, size_t count)
 287 {
 288         int rc = 0;
 289
 290         rc = kstrtobool(buf, &obd_enable_health_write);
 291         if (rc)
 292                 return rc;
 293
 294         return count;
 295 }
 296 LUSTRE_RW_ATTR(enable_health_write);
 297 #endif /* HAVE_SERVER_SUPPORT */
 298
 299 static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
 300                               char *buf)
 301 {
 302         int rc = 0;
 303
 304         if (strlen(obd_jobid_var))
 305                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
 306         return rc;
 307 }
 308
 309 static ssize_t jobid_var_store(struct kobject *kobj, struct attribute *attr,
 310                                const char *buffer, size_t count)
 311 {
 312         if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
 313                 return -EINVAL;
 314
 315         memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
 316
 317         memcpy(obd_jobid_var, buffer, count);
 318
 319         /* Trim the trailing '\n' if any */
 320         if (obd_jobid_var[count - 1] == '\n')
 321                 obd_jobid_var[count - 1] = 0;
 322
 323         return count;
 324 }
 325
 326 static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
 327                                char *buf)
 328 {
 329         int rc = 0;
 330
 331         if (strlen(obd_jobid_name))
 332                 rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
 333         return rc;
 334 }
 335
 336 static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
 337                                 const char *buffer, size_t count)
 338 {
 339         if (!count || count > LUSTRE_JOBID_SIZE)
 340                 return -EINVAL;
 341
 342         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) != 0 &&
 343             !strchr(buffer, '%')) {
 344                 lustre_jobid_clear(buffer);
 345                 return count;
 346         }
 347
 348         /* clear previous value */
 349         memset(obd_jobid_name, 0, LUSTRE_JOBID_SIZE);
 350
 351         memcpy(obd_jobid_name, buffer, count);
 352
 353         /* Trim the trailing '\n' if any */
 354         if (obd_jobid_name[count - 1] == '\n') {
 355                 /* Don't echo just a newline */
 356                 if (count == 1)
 357                         return -EINVAL;
 358                 obd_jobid_name[count - 1] = 0;
 359         }
 360
 361         return count;
 362 }
 363
 364 static ssize_t jobid_this_session_show(struct kobject *kobj,
 365                                        struct attribute *attr,
 366                                        char *buf)
 367 {
 368         char *jid;
 369         int ret = -ENOENT;
 370
 371         rcu_read_lock();
 372         jid = jobid_current();
 373         if (jid)
 374                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", jid);
 375         rcu_read_unlock();
 376         return ret;
 377 }
 378
 379 static ssize_t jobid_this_session_store(struct kobject *kobj,
 380                                         struct attribute *attr,
 381                                         const char *buffer,
 382                                         size_t count)
 383 {
 384         char *jobid;
 385         int len;
 386         int ret;
 387
 388         if (!count || count > LUSTRE_JOBID_SIZE)
 389                 return -EINVAL;
 390
 391         jobid = kstrndup(buffer, count, GFP_KERNEL);
 392         if (!jobid)
 393                 return -ENOMEM;
 394         len = strcspn(jobid, "\n ");
 395         jobid[len] = '\0';
 396         ret = jobid_set_current(jobid);
 397         kfree(jobid);
 398
 399         return ret ?: count;
 400 }
 401
 402 static ssize_t timeout_show(struct kobject *kobj,
 403                             struct attribute *attr,
 404                             char *buf)
 405 {
 406         return sprintf(buf, "%u\n", obd_timeout);
 407 }
 408
 409 static ssize_t timeout_store(struct kobject *kobj,
 410                              struct attribute *attr,
 411                              const char *buffer,
 412                              size_t count)
 413 {
 414         unsigned int val;
 415         int rc;
 416
 417         rc = kstrtouint(buffer, 10, &val);
 418         if (rc)
 419                 return rc;
 420         obd_timeout = val ?: 1U;
 421         ping_interval = max(obd_timeout / 4, 1U);
 422
 423         return count;
 424 }
 425
 426 static ssize_t debug_raw_pointers_show(struct kobject *kobj,
 427                                        struct attribute *attr,
 428                                        char *buf)
 429 {
 430         return scnprintf(buf, PAGE_SIZE, "%d\n", get_debug_raw_pointers());
 431 }
 432
 433 static ssize_t debug_raw_pointers_store(struct kobject *kobj,
 434                              struct attribute *attr,
 435                              const char *buffer,
 436                              size_t count)
 437 {
 438         bool initial = get_debug_raw_pointers();
 439         bool val;
 440         int rc;
 441
 442         rc = kstrtobool(buffer, &val);
 443         if (rc)
 444                 return rc;
 445
 446         if ((initial && val) || (!initial && !val))
 447                 return count;
 448
 449         if (val) {
 450                 rc = debug_format_buffer_alloc_buffers();
 451                 if (rc)
 452                         return rc;
 453         } else {
 454                 debug_format_buffer_free_buffers();
 455         }
 456         set_debug_raw_pointers(val);
 457
 458         return count;
 459 }
 460
 461 /* Root for /sys/kernel/debug/lustre */
 462 struct dentry *debugfs_lustre_root;
 463 EXPORT_SYMBOL_GPL(debugfs_lustre_root);
 464
 465 #ifdef CONFIG_PROC_FS
 466 /* Root for /proc/fs/lustre */
 467 struct proc_dir_entry *proc_lustre_root;
 468 EXPORT_SYMBOL(proc_lustre_root);
 469 #else
 470 #define lprocfs_base NULL
 471 #endif /* CONFIG_PROC_FS */
 472
 473 LUSTRE_RO_ATTR(version);
 474 LUSTRE_RO_ATTR(pinger);
 475 LUSTRE_RO_ATTR(health_check);
 476 LUSTRE_RW_ATTR(jobid_var);
 477 LUSTRE_RW_ATTR(jobid_name);
 478 LUSTRE_RW_ATTR(jobid_this_session);
 479 LUSTRE_RW_ATTR(timeout);
 480 LUSTRE_RW_ATTR(debug_raw_pointers);
 481
 482 static struct attribute *lustre_attrs[] = {
 483         &lustre_attr_version.attr,
 484         &lustre_attr_pinger.attr,
 485         &lustre_sattr_enable_stats_header.u.attr,
 486         &lustre_attr_health_check.attr,
 487         &lustre_attr_jobid_name.attr,
 488         &lustre_attr_jobid_var.attr,
 489         &lustre_attr_jobid_this_session.attr,
 490         &lustre_attr_timeout.attr,
 491         &lustre_attr_debug_raw_pointers.attr,
 492         &lustre_attr_max_dirty_mb.attr,
 493         &lustre_sattr_debug_peer_on_timeout.u.attr,
 494         &lustre_sattr_dump_on_timeout.u.attr,
 495         &lustre_sattr_dump_on_eviction.u.attr,
 496         &lustre_sattr_at_min.u.attr,
 497         &lustre_sattr_at_max.u.attr,
 498         &lustre_sattr_at_extra.u.attr,
 499         &lustre_sattr_at_early_margin.u.attr,
 500         &lustre_sattr_at_history.u.attr,
 501         &lustre_attr_memused_max.attr,
 502         &lustre_attr_memused.attr,
 503 #ifdef HAVE_SERVER_SUPPORT
 504         &lustre_attr_enable_health_write.attr,
 505         &lustre_sattr_ldlm_timeout.u.attr,
 506         &lustre_sattr_bulk_timeout.u.attr,
 507         &lustre_attr_no_transno.attr,
 508 #endif
 509         &lustre_sattr_lbug_on_eviction.u.attr,
 510         &lustre_sattr_ping_interval.u.attr,
 511         &lustre_sattr_evict_multiplier.u.attr,
 512         NULL,
 513 };
 514
 515 static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
 516 {
 517         struct obd_device *obd;
 518         unsigned long devno;
 519
 520         devno = *pos;
 521         obd_device_lock();
 522         obd = obd_device_find(devno);
 523
 524         if (!obd) {
 525                 obd_device_unlock();
 526                 return NULL;
 527         }
 528
 529         *pos = devno;
 530         class_incref(obd, "obd_device_list_seq", obd);
 531         obd_device_unlock();
 532
 533         return obd;
 534 }
 535
 536 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
 537 {
 538         struct obd_device *obd = v;
 539
 540         if (!obd)
 541                 return;
 542
 543         obd_device_lock();
 544         class_decref(obd, "obd_device_list_seq", obd);
 545         obd_device_unlock();
 546 }
 547
 548 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
 549 {
 550         struct obd_device *obd = v;
 551         unsigned long devno;
 552
 553         obd_device_lock();
 554         class_decref(obd, "obd_device_list_seq", obd);
 555         devno = *pos;
 556         obd = obd_device_find_after(devno);
 557
 558         if (!obd) {
 559                 (*pos)++;
 560                 obd_device_unlock();
 561                 return NULL;
 562         }
 563
 564         *pos = devno;
 565         class_incref(obd, "obd_device_list_seq", obd);
 566         obd_device_unlock();
 567
 568         return obd;
 569 }
 570
 571 static int obd_device_list_seq_show(struct seq_file *p, void *v)
 572 {
 573         struct obd_device *obd = v;
 574         char *status;
 575         int dev_no;
 576
 577         if (!obd)
 578                 return 0;
 579
 580         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 581         dev_no = obd->obd_minor;
 582
 583         if (obd->obd_stopping)
 584                 status = "ST";
 585         else if (obd->obd_inactive)
 586                 status = "IN";
 587         else if (obd->obd_set_up)
 588                 status = "UP";
 589         else if (obd->obd_attached)
 590                 status = "AT";
 591         else
 592                 status = "--";
 593
 594         seq_printf(p, "%3d %s %s %s %s %d\n",
 595                    dev_no, status, obd->obd_type->typ_name,
 596                    obd->obd_name, obd->obd_uuid.uuid,
 597                    kref_read(&obd->obd_refcount));
 598
 599         return 0;
 600 }
 601
 602 static const struct seq_operations obd_device_list_sops = {
 603         .start = obd_device_list_seq_start,
 604         .stop = obd_device_list_seq_stop,
 605         .next = obd_device_list_seq_next,
 606         .show = obd_device_list_seq_show,
 607 };
 608
 609 static int obd_device_list_open(struct inode *inode, struct file *file)
 610 {
 611         struct seq_file *seq;
 612         int rc = seq_open(file, &obd_device_list_sops);
 613
 614         if (rc)
 615                 return rc;
 616
 617         seq = file->private_data;
 618         seq->private = inode->i_private;
 619         return 0;
 620 }
 621
 622 static const struct file_operations obd_device_list_fops = {
 623         .owner   = THIS_MODULE,
 624         .open    = obd_device_list_open,
 625         .read    = seq_read,
 626         .llseek  = seq_lseek,
 627         .release = seq_release,
 628 };
 629
 630 /* checksum_speed */
 631 static void *checksum_speed_start(struct seq_file *p, loff_t *pos)
 632 {
 633         return pos;
 634 }
 635
 636 static void checksum_speed_stop(struct seq_file *p, void *v)
 637 {
 638 }
 639
 640 static void *checksum_speed_next(struct seq_file *p, void *v, loff_t *pos)
 641 {
 642         ++(*pos);
 643         if (*pos >= CFS_HASH_ALG_SPEED_MAX - 1)
 644                 return NULL;
 645
 646         return pos;
 647 }
 648
 649 static int checksum_speed_show(struct seq_file *p, void *v)
 650 {
 651         loff_t index = *(loff_t *)v;
 652
 653         if (!index || index > CFS_HASH_ALG_SPEED_MAX - 1)
 654                 return 0;
 655
 656         seq_printf(p, "%s: %d\n", cfs_crypto_hash_name(index),
 657                    cfs_crypto_hash_speeds[index]);
 658
 659         return 0;
 660 }
 661
 662 static const struct seq_operations checksum_speed_sops = {
 663         .start = checksum_speed_start,
 664         .stop = checksum_speed_stop,
 665         .next = checksum_speed_next,
 666         .show = checksum_speed_show,
 667 };
 668
 669 static int checksum_speed_open(struct inode *inode, struct file *file)
 670 {
 671         int rc = seq_open(file, &checksum_speed_sops);
 672
 673         if (rc)
 674                 return rc;
 675
 676         return 0;
 677 }
 678
 679 static const struct file_operations checksum_speed_fops = {
 680         .owner   = THIS_MODULE,
 681         .open    = checksum_speed_open,
 682         .read    = seq_read,
 683         .llseek  = seq_lseek,
 684         .release = seq_release,
 685 };
 686
 687 static int
 688 health_check_seq_show(struct seq_file *m, void *unused)
 689 {
 690         struct obd_device *obd = NULL;
 691         unsigned long dev_no = 0;
 692
 693         obd_device_lock();
 694         obd_device_for_each_cond(dev_no, obd, obd->obd_attached &&
 695                                  obd->obd_set_up && !obd->obd_stopping) {
 696                 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 697
 698                 class_incref(obd, __func__, current);
 699                 obd_device_unlock();
 700                 if (obd_health_check(NULL, obd)) {
 701                         seq_printf(m, "device %s reported unhealthy\n",
 702                                    obd->obd_name);
 703                 }
 704                 obd_device_lock();
 705                 class_decref(obd, __func__, current);
 706         }
 707         obd_device_unlock();
 708
 709         return 0;
 710 }
 711
 712 LDEBUGFS_SEQ_FOPS_RO(health_check);
 713
 714 struct kset *lustre_kset;
 715 EXPORT_SYMBOL_GPL(lustre_kset);
 716
 717 static struct attribute_group lustre_attr_group = {
 718         .attrs = lustre_attrs,
 719 };
 720
 721 ssize_t class_set_global(const char *param)
 722 {
 723         const char *value = strchr(param, '=') + 1;
 724         size_t off = value - param - 1;
 725         ssize_t count = -ENOENT;
 726         int i;
 727
 728         for (i = 0; lustre_attrs[i]; i++) {
 729                 if (!strncmp(lustre_attrs[i]->name, param, off)) {
 730                         count = lustre_attr_store(&lustre_kset->kobj,
 731                                                   lustre_attrs[i], value,
 732                                                   strlen(value));
 733                         break;
 734                 }
 735         }
 736         return count;
 737 }
 738
 739 int class_procfs_init(void)
 740 {
 741         struct proc_dir_entry *entry;
 742         int rc = -ENOMEM;
 743
 744         ENTRY;
 745
 746         lustre_kset = kset_create_and_add("lustre", NULL, fs_kobj);
 747         if (!lustre_kset)
 748                 goto out;
 749
 750         /* Create the files associated with this kobject */
 751         rc = sysfs_create_group(&lustre_kset->kobj, &lustre_attr_group);
 752         if (rc) {
 753                 kset_unregister(lustre_kset);
 754                 goto out;
 755         }
 756
 757         rc = jobid_cache_init();
 758         if (rc) {
 759                 kset_unregister(lustre_kset);
 760                 goto out;
 761         }
 762
 763         debugfs_lustre_root = debugfs_create_dir("lustre", NULL);
 764
 765         debugfs_create_file("devices", 0444, debugfs_lustre_root, NULL,
 766                             &obd_device_list_fops);
 767
 768         debugfs_create_file("health_check", 0444, debugfs_lustre_root,
 769                             NULL, &health_check_fops);
 770
 771         debugfs_create_file("checksum_speed", 0444, debugfs_lustre_root,
 772                             NULL, &checksum_speed_fops);
 773
 774         entry = lprocfs_register("fs/lustre", NULL, NULL, NULL);
 775         if (IS_ERR(entry)) {
 776                 rc = PTR_ERR(entry);
 777                 CERROR("cannot create '/proc/fs/lustre': rc = %d\n", rc);
 778                 debugfs_remove_recursive(debugfs_lustre_root);
 779                 kset_unregister(lustre_kset);
 780                 goto out;
 781         }
 782
 783         proc_lustre_root = entry;
 784 out:
 785         RETURN(rc);
 786 }
 787
 788 int class_procfs_clean(void)
 789 {
 790         ENTRY;
 791
 792         debugfs_remove_recursive(debugfs_lustre_root);
 793
 794         debugfs_lustre_root = NULL;
 795         jobid_cache_fini();
 796
 797         if (proc_lustre_root)
 798                 lprocfs_remove(&proc_lustre_root);
 799
 800         sysfs_remove_group(&lustre_kset->kobj, &lustre_attr_group);
 801
 802         kset_unregister(lustre_kset);
 803
 804         RETURN(0);
 805 }