drivers/staging/lustre/lustre/obdclass/class_obd.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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_CLASS
  38 # include <asm/atomic.h>
  39
  40 #include <obd_support.h>
  41 #include <obd_class.h>
  42 #include <linux/lnet/lnetctl.h>
  43 #include <lustre_debug.h>
  44 #include <lprocfs_status.h>
  45 #include <lustre/lustre_build_version.h>
  46 #include <linux/list.h>
  47 #include <cl_object.h>
  48 #include "llog_internal.h"
  49
  50
  51 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  52 EXPORT_SYMBOL(obd_devs);
  53 struct list_head obd_types;
  54 DEFINE_RWLOCK(obd_dev_lock);
  55
  56 __u64 obd_max_pages = 0;
  57 __u64 obd_max_alloc = 0;
  58 DEFINE_SPINLOCK(obd_updatemax_lock);
  59
  60 /* The following are visible and mutable through /proc/sys/lustre/. */
  61 unsigned int obd_alloc_fail_rate = 0;
  62 EXPORT_SYMBOL(obd_alloc_fail_rate);
  63 unsigned int obd_debug_peer_on_timeout;
  64 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  65 unsigned int obd_dump_on_timeout;
  66 EXPORT_SYMBOL(obd_dump_on_timeout);
  67 unsigned int obd_dump_on_eviction;
  68 EXPORT_SYMBOL(obd_dump_on_eviction);
  69 unsigned int obd_max_dirty_pages = 256;
  70 EXPORT_SYMBOL(obd_max_dirty_pages);
  71 atomic_t obd_dirty_pages;
  72 EXPORT_SYMBOL(obd_dirty_pages);
  73 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  74 EXPORT_SYMBOL(obd_timeout);
  75 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  76 EXPORT_SYMBOL(ldlm_timeout);
  77 unsigned int obd_timeout_set;
  78 EXPORT_SYMBOL(obd_timeout_set);
  79 unsigned int ldlm_timeout_set;
  80 EXPORT_SYMBOL(ldlm_timeout_set);
  81 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  82 unsigned int at_min = 0;
  83 EXPORT_SYMBOL(at_min);
  84 unsigned int at_max = 600;
  85 EXPORT_SYMBOL(at_max);
  86 unsigned int at_history = 600;
  87 EXPORT_SYMBOL(at_history);
  88 int at_early_margin = 5;
  89 EXPORT_SYMBOL(at_early_margin);
  90 int at_extra = 30;
  91 EXPORT_SYMBOL(at_extra);
  92
  93 atomic_t obd_dirty_transit_pages;
  94 EXPORT_SYMBOL(obd_dirty_transit_pages);
  95
  96 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
  97 EXPORT_SYMBOL(obd_jobid_var);
  98
  99 /* Get jobid of current process by reading the environment variable
 100  * stored in between the "env_start" & "env_end" of task struct.
 101  *
 102  * TODO:
 103  * It's better to cache the jobid for later use if there is any
 104  * efficient way, the cl_env code probably could be reused for this
 105  * purpose.
 106  *
 107  * If some job scheduler doesn't store jobid in the "env_start/end",
 108  * then an upcall could be issued here to get the jobid by utilizing
 109  * the userspace tools/api. Then, the jobid must be cached.
 110  */
 111 int lustre_get_jobid(char *jobid)
 112 {
 113         int jobid_len = JOBSTATS_JOBID_SIZE;
 114         int rc = 0;
 115
 116         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 117         /* Jobstats isn't enabled */
 118         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 119                 return 0;
 120
 121         /* Use process name + fsuid as jobid */
 122         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 123                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 124                          current_comm(),
 125                          from_kuid(&init_user_ns, current_fsuid()));
 126                 return 0;
 127         }
 128
 129         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 130         if (rc) {
 131                 if (rc == -EOVERFLOW) {
 132                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 133                          * variable length strings instead of just numbers), it
 134                          * might make sense to keep the unique parts for JobID,
 135                          * instead of just returning an error.  That means a
 136                          * larger temp buffer for cfs_get_environ(), then
 137                          * truncating the string at some separator to fit into
 138                          * the specified jobid_len.  Fix later if needed. */
 139                         static bool printed;
 140                         if (unlikely(!printed)) {
 141                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 142                                                    "for JobID buffer (%d)\n",
 143                                                    obd_jobid_var, jobid_len);
 144                                 printed = true;
 145                         }
 146                 } else {
 147                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 148                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 149                                "Get jobid for (%s) failed: rc = %d\n",
 150                                obd_jobid_var, rc);
 151                 }
 152         }
 153         return rc;
 154 }
 155 EXPORT_SYMBOL(lustre_get_jobid);
 156
 157 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 158                    size_t size, const char *file, int line)
 159 {
 160         if (ptr == NULL ||
 161             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 162                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 163                        ptr ? "force " :"", type, name, (__u64)size, file,
 164                        line);
 165                 CERROR(LPU64" total bytes and "LPU64" total pages "
 166                        "("LPU64" bytes) allocated by Lustre, "
 167                        "%d total bytes by LNET\n",
 168                        obd_memory_sum(),
 169                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 170                        obd_pages_sum(),
 171                         atomic_read(&libcfs_kmemory));
 172                 return 1;
 173         }
 174         return 0;
 175 }
 176 EXPORT_SYMBOL(obd_alloc_fail);
 177
 178 static inline void obd_data2conn(struct lustre_handle *conn,
 179                                  struct obd_ioctl_data *data)
 180 {
 181         memset(conn, 0, sizeof *conn);
 182         conn->cookie = data->ioc_cookie;
 183 }
 184
 185 static inline void obd_conn2data(struct obd_ioctl_data *data,
 186                                  struct lustre_handle *conn)
 187 {
 188         data->ioc_cookie = conn->cookie;
 189 }
 190
 191 int class_resolve_dev_name(__u32 len, const char *name)
 192 {
 193         int rc;
 194         int dev;
 195
 196         if (!len || !name) {
 197                 CERROR("No name passed,!\n");
 198                 GOTO(out, rc = -EINVAL);
 199         }
 200         if (name[len - 1] != 0) {
 201                 CERROR("Name not nul terminated!\n");
 202                 GOTO(out, rc = -EINVAL);
 203         }
 204
 205         CDEBUG(D_IOCTL, "device name %s\n", name);
 206         dev = class_name2dev(name);
 207         if (dev == -1) {
 208                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 209                 GOTO(out, rc = -EINVAL);
 210         }
 211
 212         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 213         rc = dev;
 214
 215 out:
 216         return rc;
 217 }
 218
 219 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 220 {
 221         char *buf = NULL;
 222         struct obd_ioctl_data *data;
 223         struct libcfs_debug_ioctl_data *debug_data;
 224         struct obd_device *obd = NULL;
 225         int err = 0, len = 0;
 226
 227         /* only for debugging */
 228         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 229                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 230                 libcfs_subsystem_debug = debug_data->subs;
 231                 libcfs_debug = debug_data->debug;
 232                 return 0;
 233         }
 234
 235         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 236         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 237                 CERROR("OBD ioctl: data error\n");
 238                 return -EINVAL;
 239         }
 240         data = (struct obd_ioctl_data *)buf;
 241
 242         switch (cmd) {
 243         case OBD_IOC_PROCESS_CFG: {
 244                 struct lustre_cfg *lcfg;
 245
 246                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 247                         CERROR("No config buffer passed!\n");
 248                         GOTO(out, err = -EINVAL);
 249                 }
 250                 OBD_ALLOC(lcfg, data->ioc_plen1);
 251                 if (lcfg == NULL)
 252                         GOTO(out, err = -ENOMEM);
 253                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 254                                          data->ioc_plen1);
 255                 if (!err)
 256                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 257                 if (!err)
 258                         err = class_process_config(lcfg);
 259
 260                 OBD_FREE(lcfg, data->ioc_plen1);
 261                 GOTO(out, err);
 262         }
 263
 264         case OBD_GET_VERSION:
 265                 if (!data->ioc_inlbuf1) {
 266                         CERROR("No buffer passed in ioctl\n");
 267                         GOTO(out, err = -EINVAL);
 268                 }
 269
 270                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 271                         CERROR("ioctl buffer too small to hold version\n");
 272                         GOTO(out, err = -EINVAL);
 273                 }
 274
 275                 memcpy(data->ioc_bulk, BUILD_VERSION,
 276                        strlen(BUILD_VERSION) + 1);
 277
 278                 err = obd_ioctl_popdata((void *)arg, data, len);
 279                 if (err)
 280                         err = -EFAULT;
 281                 GOTO(out, err);
 282
 283         case OBD_IOC_NAME2DEV: {
 284                 /* Resolve a device name.  This does not change the
 285                  * currently selected device.
 286                  */
 287                 int dev;
 288
 289                 dev = class_resolve_dev_name(data->ioc_inllen1,
 290                                              data->ioc_inlbuf1);
 291                 data->ioc_dev = dev;
 292                 if (dev < 0)
 293                         GOTO(out, err = -EINVAL);
 294
 295                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 296                 if (err)
 297                         err = -EFAULT;
 298                 GOTO(out, err);
 299         }
 300
 301         case OBD_IOC_UUID2DEV: {
 302                 /* Resolve a device uuid.  This does not change the
 303                  * currently selected device.
 304                  */
 305                 int dev;
 306                 struct obd_uuid uuid;
 307
 308                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 309                         CERROR("No UUID passed!\n");
 310                         GOTO(out, err = -EINVAL);
 311                 }
 312                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 313                         CERROR("UUID not NUL terminated!\n");
 314                         GOTO(out, err = -EINVAL);
 315                 }
 316
 317                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 318                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 319                 dev = class_uuid2dev(&uuid);
 320                 data->ioc_dev = dev;
 321                 if (dev == -1) {
 322                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 323                                data->ioc_inlbuf1);
 324                         GOTO(out, err = -EINVAL);
 325                 }
 326
 327                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 328                        dev);
 329                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 330                 if (err)
 331                         err = -EFAULT;
 332                 GOTO(out, err);
 333         }
 334
 335         case OBD_IOC_CLOSE_UUID: {
 336                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 337                        data->ioc_inlbuf1);
 338                 GOTO(out, err = 0);
 339         }
 340
 341         case OBD_IOC_GETDEVICE: {
 342                 int     index = data->ioc_count;
 343                 char    *status, *str;
 344
 345                 if (!data->ioc_inlbuf1) {
 346                         CERROR("No buffer passed in ioctl\n");
 347                         GOTO(out, err = -EINVAL);
 348                 }
 349                 if (data->ioc_inllen1 < 128) {
 350                         CERROR("ioctl buffer too small to hold version\n");
 351                         GOTO(out, err = -EINVAL);
 352                 }
 353
 354                 obd = class_num2obd(index);
 355                 if (!obd)
 356                         GOTO(out, err = -ENOENT);
 357
 358                 if (obd->obd_stopping)
 359                         status = "ST";
 360                 else if (obd->obd_set_up)
 361                         status = "UP";
 362                 else if (obd->obd_attached)
 363                         status = "AT";
 364                 else
 365                         status = "--";
 366                 str = (char *)data->ioc_bulk;
 367                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 368                          (int)index, status, obd->obd_type->typ_name,
 369                          obd->obd_name, obd->obd_uuid.uuid,
 370                          atomic_read(&obd->obd_refcount));
 371                 err = obd_ioctl_popdata((void *)arg, data, len);
 372
 373                 GOTO(out, err = 0);
 374         }
 375
 376         }
 377
 378         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 379                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 380                         GOTO(out, err = -EINVAL);
 381                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 382                         GOTO(out, err = -EINVAL);
 383                 obd = class_name2obd(data->ioc_inlbuf4);
 384         } else if (data->ioc_dev < class_devno_max()) {
 385                 obd = class_num2obd(data->ioc_dev);
 386         } else {
 387                 CERROR("OBD ioctl: No device\n");
 388                 GOTO(out, err = -EINVAL);
 389         }
 390
 391         if (obd == NULL) {
 392                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 393                 GOTO(out, err = -EINVAL);
 394         }
 395         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 396
 397         if (!obd->obd_set_up || obd->obd_stopping) {
 398                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 399                 GOTO(out, err = -EINVAL);
 400         }
 401
 402         switch(cmd) {
 403         case OBD_IOC_NO_TRANSNO: {
 404                 if (!obd->obd_attached) {
 405                         CERROR("Device %d not attached\n", obd->obd_minor);
 406                         GOTO(out, err = -ENODEV);
 407                 }
 408                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 409                        obd->obd_name);
 410                 obd->obd_no_transno = 1;
 411                 GOTO(out, err = 0);
 412         }
 413
 414         default: {
 415                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 416                 if (err)
 417                         GOTO(out, err);
 418
 419                 err = obd_ioctl_popdata((void *)arg, data, len);
 420                 if (err)
 421                         err = -EFAULT;
 422                 GOTO(out, err);
 423         }
 424         }
 425
 426  out:
 427         if (buf)
 428                 obd_ioctl_freedata(buf, len);
 429         return err;
 430 } /* class_handle_ioctl */
 431
 432 extern struct miscdevice obd_psdev;
 433
 434 #define OBD_INIT_CHECK
 435 int obd_init_checks(void)
 436 {
 437         __u64 u64val, div64val;
 438         char buf[64];
 439         int len, ret = 0;
 440
 441         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 442
 443         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 444
 445         u64val = OBD_OBJECT_EOF;
 446         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 447         if (u64val != OBD_OBJECT_EOF) {
 448                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 449                        u64val, (int)sizeof(u64val));
 450                 ret = -EINVAL;
 451         }
 452         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 453         if (len != 18) {
 454                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 455                 ret = -EINVAL;
 456         }
 457
 458         div64val = OBD_OBJECT_EOF;
 459         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 460         if (u64val != OBD_OBJECT_EOF) {
 461                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 462                        u64val, (int)sizeof(u64val));
 463                 ret = -EOVERFLOW;
 464         }
 465         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 466                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 467                        u64val, (int)sizeof(u64val));
 468                 return -EOVERFLOW;
 469         }
 470         if (do_div(div64val, 256) != (u64val & 255)) {
 471                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 472                 return -EOVERFLOW;
 473         }
 474         if (u64val >> 8 != div64val) {
 475                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 476                        u64val, div64val, u64val >> 8);
 477                 return -EOVERFLOW;
 478         }
 479         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 480         if (len != 18) {
 481                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 482                 ret = -EINVAL;
 483         }
 484         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 485         if (len != 20) {
 486                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 487                 ret = -EINVAL;
 488         }
 489         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 490         if (len != 2) {
 491                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 492                 ret = -EINVAL;
 493         }
 494         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 495                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 496                       (__u64)PAGE_CACHE_SIZE);
 497                 ret = -EINVAL;
 498         }
 499
 500         return ret;
 501 }
 502
 503 extern spinlock_t obd_types_lock;
 504 extern int class_procfs_init(void);
 505 extern int class_procfs_clean(void);
 506
 507 static int __init init_obdclass(void)
 508 {
 509         int i, err;
 510         int lustre_register_fs(void);
 511
 512         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 513                 INIT_LIST_HEAD(&capa_list[i]);
 514
 515         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 516
 517         spin_lock_init(&obd_types_lock);
 518         obd_zombie_impexp_init();
 519 #ifdef LPROCFS
 520         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 521                                          LPROCFS_STATS_FLAG_NONE |
 522                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 523         if (obd_memory == NULL) {
 524                 CERROR("kmalloc of 'obd_memory' failed\n");
 525                 return -ENOMEM;
 526         }
 527
 528         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 529                              LPROCFS_CNTR_AVGMINMAX,
 530                              "memused", "bytes");
 531         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 532                              LPROCFS_CNTR_AVGMINMAX,
 533                              "pagesused", "pages");
 534 #endif
 535         err = obd_init_checks();
 536         if (err == -EOVERFLOW)
 537                 return err;
 538
 539         class_init_uuidlist();
 540         err = class_handle_init();
 541         if (err)
 542                 return err;
 543
 544         INIT_LIST_HEAD(&obd_types);
 545
 546         err = misc_register(&obd_psdev);
 547         if (err) {
 548                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 549                 return err;
 550         }
 551
 552         /* This struct is already zeroed for us (static global) */
 553         for (i = 0; i < class_devno_max(); i++)
 554                 obd_devs[i] = NULL;
 555
 556         /* Default the dirty page cache cap to 1/2 of system memory.
 557          * For clients with less memory, a larger fraction is needed
 558          * for other purposes (mostly for BGL). */
 559         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 560                 obd_max_dirty_pages = totalram_pages / 4;
 561         else
 562                 obd_max_dirty_pages = totalram_pages / 2;
 563
 564         err = obd_init_caches();
 565         if (err)
 566                 return err;
 567         err = class_procfs_init();
 568         if (err)
 569                 return err;
 570
 571         err = lu_global_init();
 572         if (err)
 573                 return err;
 574
 575         err = cl_global_init();
 576         if (err != 0)
 577                 return err;
 578
 579
 580         err = llog_info_init();
 581         if (err)
 582                 return err;
 583
 584         err = lustre_register_fs();
 585
 586         return err;
 587 }
 588
 589 void obd_update_maxusage(void)
 590 {
 591         __u64 max1, max2;
 592
 593         max1 = obd_pages_sum();
 594         max2 = obd_memory_sum();
 595
 596         spin_lock(&obd_updatemax_lock);
 597         if (max1 > obd_max_pages)
 598                 obd_max_pages = max1;
 599         if (max2 > obd_max_alloc)
 600                 obd_max_alloc = max2;
 601         spin_unlock(&obd_updatemax_lock);
 602 }
 603 EXPORT_SYMBOL(obd_update_maxusage);
 604
 605 #ifdef LPROCFS
 606 __u64 obd_memory_max(void)
 607 {
 608         __u64 ret;
 609
 610         spin_lock(&obd_updatemax_lock);
 611         ret = obd_max_alloc;
 612         spin_unlock(&obd_updatemax_lock);
 613
 614         return ret;
 615 }
 616 EXPORT_SYMBOL(obd_memory_max);
 617
 618 __u64 obd_pages_max(void)
 619 {
 620         __u64 ret;
 621
 622         spin_lock(&obd_updatemax_lock);
 623         ret = obd_max_pages;
 624         spin_unlock(&obd_updatemax_lock);
 625
 626         return ret;
 627 }
 628 EXPORT_SYMBOL(obd_pages_max);
 629 #endif
 630
 631 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 632  * ifdef to the end of the file to cover module and versioning goo.*/
 633 static void cleanup_obdclass(void)
 634 {
 635         int i;
 636         int lustre_unregister_fs(void);
 637         __u64 memory_leaked, pages_leaked;
 638         __u64 memory_max, pages_max;
 639
 640         lustre_unregister_fs();
 641
 642         misc_deregister(&obd_psdev);
 643         for (i = 0; i < class_devno_max(); i++) {
 644                 struct obd_device *obd = class_num2obd(i);
 645                 if (obd && obd->obd_set_up &&
 646                     OBT(obd) && OBP(obd, detach)) {
 647                         /* XXX should this call generic detach otherwise? */
 648                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 649                         OBP(obd, detach)(obd);
 650                 }
 651         }
 652         llog_info_fini();
 653         cl_global_fini();
 654         lu_global_fini();
 655
 656         obd_cleanup_caches();
 657         obd_sysctl_clean();
 658
 659         class_procfs_clean();
 660
 661         class_handle_cleanup();
 662         class_exit_uuidlist();
 663         obd_zombie_impexp_stop();
 664
 665         memory_leaked = obd_memory_sum();
 666         pages_leaked = obd_pages_sum();
 667
 668         memory_max = obd_memory_max();
 669         pages_max = obd_pages_max();
 670
 671         lprocfs_free_stats(&obd_memory);
 672         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 673                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 674                memory_max, memory_leaked);
 675         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 676                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 677                pages_max, pages_leaked);
 678 }
 679
 680 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 681 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 682 MODULE_LICENSE("GPL");
 683 MODULE_VERSION(LUSTRE_VERSION_STRING);
 684
 685 module_init(init_obdclass);
 686 module_exit(cleanup_obdclass);