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         ENTRY;
 116
 117         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 118         /* Jobstats isn't enabled */
 119         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 120                 RETURN(0);
 121
 122         /* Use process name + fsuid as jobid */
 123         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 124                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 125                          current_comm(), 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         ENTRY;
 197         if (!len || !name) {
 198                 CERROR("No name passed,!\n");
 199                 GOTO(out, rc = -EINVAL);
 200         }
 201         if (name[len - 1] != 0) {
 202                 CERROR("Name not nul terminated!\n");
 203                 GOTO(out, rc = -EINVAL);
 204         }
 205
 206         CDEBUG(D_IOCTL, "device name %s\n", name);
 207         dev = class_name2dev(name);
 208         if (dev == -1) {
 209                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 210                 GOTO(out, rc = -EINVAL);
 211         }
 212
 213         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 214         rc = dev;
 215
 216 out:
 217         RETURN(rc);
 218 }
 219
 220 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 221 {
 222         char *buf = NULL;
 223         struct obd_ioctl_data *data;
 224         struct libcfs_debug_ioctl_data *debug_data;
 225         struct obd_device *obd = NULL;
 226         int err = 0, len = 0;
 227         ENTRY;
 228
 229         /* only for debugging */
 230         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 231                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 232                 libcfs_subsystem_debug = debug_data->subs;
 233                 libcfs_debug = debug_data->debug;
 234                 return 0;
 235         }
 236
 237         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 238         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 239                 CERROR("OBD ioctl: data error\n");
 240                 RETURN(-EINVAL);
 241         }
 242         data = (struct obd_ioctl_data *)buf;
 243
 244         switch (cmd) {
 245         case OBD_IOC_PROCESS_CFG: {
 246                 struct lustre_cfg *lcfg;
 247
 248                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 249                         CERROR("No config buffer passed!\n");
 250                         GOTO(out, err = -EINVAL);
 251                 }
 252                 OBD_ALLOC(lcfg, data->ioc_plen1);
 253                 if (lcfg == NULL)
 254                         GOTO(out, err = -ENOMEM);
 255                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 256                                          data->ioc_plen1);
 257                 if (!err)
 258                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 259                 if (!err)
 260                         err = class_process_config(lcfg);
 261
 262                 OBD_FREE(lcfg, data->ioc_plen1);
 263                 GOTO(out, err);
 264         }
 265
 266         case OBD_GET_VERSION:
 267                 if (!data->ioc_inlbuf1) {
 268                         CERROR("No buffer passed in ioctl\n");
 269                         GOTO(out, err = -EINVAL);
 270                 }
 271
 272                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 273                         CERROR("ioctl buffer too small to hold version\n");
 274                         GOTO(out, err = -EINVAL);
 275                 }
 276
 277                 memcpy(data->ioc_bulk, BUILD_VERSION,
 278                        strlen(BUILD_VERSION) + 1);
 279
 280                 err = obd_ioctl_popdata((void *)arg, data, len);
 281                 if (err)
 282                         err = -EFAULT;
 283                 GOTO(out, err);
 284
 285         case OBD_IOC_NAME2DEV: {
 286                 /* Resolve a device name.  This does not change the
 287                  * currently selected device.
 288                  */
 289                 int dev;
 290
 291                 dev = class_resolve_dev_name(data->ioc_inllen1,
 292                                              data->ioc_inlbuf1);
 293                 data->ioc_dev = dev;
 294                 if (dev < 0)
 295                         GOTO(out, err = -EINVAL);
 296
 297                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 298                 if (err)
 299                         err = -EFAULT;
 300                 GOTO(out, err);
 301         }
 302
 303         case OBD_IOC_UUID2DEV: {
 304                 /* Resolve a device uuid.  This does not change the
 305                  * currently selected device.
 306                  */
 307                 int dev;
 308                 struct obd_uuid uuid;
 309
 310                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 311                         CERROR("No UUID passed!\n");
 312                         GOTO(out, err = -EINVAL);
 313                 }
 314                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 315                         CERROR("UUID not NUL terminated!\n");
 316                         GOTO(out, err = -EINVAL);
 317                 }
 318
 319                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 320                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 321                 dev = class_uuid2dev(&uuid);
 322                 data->ioc_dev = dev;
 323                 if (dev == -1) {
 324                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 325                                data->ioc_inlbuf1);
 326                         GOTO(out, err = -EINVAL);
 327                 }
 328
 329                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 330                        dev);
 331                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 332                 if (err)
 333                         err = -EFAULT;
 334                 GOTO(out, err);
 335         }
 336
 337         case OBD_IOC_CLOSE_UUID: {
 338                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 339                        data->ioc_inlbuf1);
 340                 GOTO(out, err = 0);
 341         }
 342
 343         case OBD_IOC_GETDEVICE: {
 344                 int     index = data->ioc_count;
 345                 char    *status, *str;
 346
 347                 if (!data->ioc_inlbuf1) {
 348                         CERROR("No buffer passed in ioctl\n");
 349                         GOTO(out, err = -EINVAL);
 350                 }
 351                 if (data->ioc_inllen1 < 128) {
 352                         CERROR("ioctl buffer too small to hold version\n");
 353                         GOTO(out, err = -EINVAL);
 354                 }
 355
 356                 obd = class_num2obd(index);
 357                 if (!obd)
 358                         GOTO(out, err = -ENOENT);
 359
 360                 if (obd->obd_stopping)
 361                         status = "ST";
 362                 else if (obd->obd_set_up)
 363                         status = "UP";
 364                 else if (obd->obd_attached)
 365                         status = "AT";
 366                 else
 367                         status = "--";
 368                 str = (char *)data->ioc_bulk;
 369                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 370                          (int)index, status, obd->obd_type->typ_name,
 371                          obd->obd_name, obd->obd_uuid.uuid,
 372                          atomic_read(&obd->obd_refcount));
 373                 err = obd_ioctl_popdata((void *)arg, data, len);
 374
 375                 GOTO(out, err = 0);
 376         }
 377
 378         }
 379
 380         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 381                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 382                         GOTO(out, err = -EINVAL);
 383                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 384                         GOTO(out, err = -EINVAL);
 385                 obd = class_name2obd(data->ioc_inlbuf4);
 386         } else if (data->ioc_dev < class_devno_max()) {
 387                 obd = class_num2obd(data->ioc_dev);
 388         } else {
 389                 CERROR("OBD ioctl: No device\n");
 390                 GOTO(out, err = -EINVAL);
 391         }
 392
 393         if (obd == NULL) {
 394                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 395                 GOTO(out, err = -EINVAL);
 396         }
 397         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 398
 399         if (!obd->obd_set_up || obd->obd_stopping) {
 400                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 401                 GOTO(out, err = -EINVAL);
 402         }
 403
 404         switch(cmd) {
 405         case OBD_IOC_NO_TRANSNO: {
 406                 if (!obd->obd_attached) {
 407                         CERROR("Device %d not attached\n", obd->obd_minor);
 408                         GOTO(out, err = -ENODEV);
 409                 }
 410                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 411                        obd->obd_name);
 412                 obd->obd_no_transno = 1;
 413                 GOTO(out, err = 0);
 414         }
 415
 416         default: {
 417                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 418                 if (err)
 419                         GOTO(out, err);
 420
 421                 err = obd_ioctl_popdata((void *)arg, data, len);
 422                 if (err)
 423                         err = -EFAULT;
 424                 GOTO(out, err);
 425         }
 426         }
 427
 428  out:
 429         if (buf)
 430                 obd_ioctl_freedata(buf, len);
 431         RETURN(err);
 432 } /* class_handle_ioctl */
 433
 434 extern psdev_t obd_psdev;
 435
 436 #define OBD_INIT_CHECK
 437 int obd_init_checks(void)
 438 {
 439         __u64 u64val, div64val;
 440         char buf[64];
 441         int len, ret = 0;
 442
 443         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 444
 445         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 446
 447         u64val = OBD_OBJECT_EOF;
 448         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 449         if (u64val != OBD_OBJECT_EOF) {
 450                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 451                        u64val, (int)sizeof(u64val));
 452                 ret = -EINVAL;
 453         }
 454         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 455         if (len != 18) {
 456                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 457                 ret = -EINVAL;
 458         }
 459
 460         div64val = OBD_OBJECT_EOF;
 461         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 462         if (u64val != OBD_OBJECT_EOF) {
 463                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 464                        u64val, (int)sizeof(u64val));
 465                 ret = -EOVERFLOW;
 466         }
 467         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 468                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 469                        u64val, (int)sizeof(u64val));
 470                 return -EOVERFLOW;
 471         }
 472         if (do_div(div64val, 256) != (u64val & 255)) {
 473                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 474                 return -EOVERFLOW;
 475         }
 476         if (u64val >> 8 != div64val) {
 477                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 478                        u64val, div64val, u64val >> 8);
 479                 return -EOVERFLOW;
 480         }
 481         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 482         if (len != 18) {
 483                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 484                 ret = -EINVAL;
 485         }
 486         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 487         if (len != 20) {
 488                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 489                 ret = -EINVAL;
 490         }
 491         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 492         if (len != 2) {
 493                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 494                 ret = -EINVAL;
 495         }
 496         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 497                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 498                       (__u64)PAGE_CACHE_SIZE);
 499                 ret = -EINVAL;
 500         }
 501
 502         return ret;
 503 }
 504
 505 extern spinlock_t obd_types_lock;
 506 extern int class_procfs_init(void);
 507 extern int class_procfs_clean(void);
 508
 509 static int __init init_obdclass(void)
 510 {
 511         int i, err;
 512         int lustre_register_fs(void);
 513
 514         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 515                 INIT_LIST_HEAD(&capa_list[i]);
 516
 517         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 518
 519         spin_lock_init(&obd_types_lock);
 520         obd_zombie_impexp_init();
 521 #ifdef LPROCFS
 522         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 523                                          LPROCFS_STATS_FLAG_NONE |
 524                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 525         if (obd_memory == NULL) {
 526                 CERROR("kmalloc of 'obd_memory' failed\n");
 527                 RETURN(-ENOMEM);
 528         }
 529
 530         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 531                              LPROCFS_CNTR_AVGMINMAX,
 532                              "memused", "bytes");
 533         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 534                              LPROCFS_CNTR_AVGMINMAX,
 535                              "pagesused", "pages");
 536 #endif
 537         err = obd_init_checks();
 538         if (err == -EOVERFLOW)
 539                 return err;
 540
 541         class_init_uuidlist();
 542         err = class_handle_init();
 543         if (err)
 544                 return err;
 545
 546         INIT_LIST_HEAD(&obd_types);
 547
 548         err = misc_register(&obd_psdev);
 549         if (err) {
 550                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 551                 return err;
 552         }
 553
 554         /* This struct is already zeroed for us (static global) */
 555         for (i = 0; i < class_devno_max(); i++)
 556                 obd_devs[i] = NULL;
 557
 558         /* Default the dirty page cache cap to 1/2 of system memory.
 559          * For clients with less memory, a larger fraction is needed
 560          * for other purposes (mostly for BGL). */
 561         if (num_physpages <= 512 << (20 - PAGE_CACHE_SHIFT))
 562                 obd_max_dirty_pages = num_physpages / 4;
 563         else
 564                 obd_max_dirty_pages = num_physpages / 2;
 565
 566         err = obd_init_caches();
 567         if (err)
 568                 return err;
 569         err = class_procfs_init();
 570         if (err)
 571                 return err;
 572
 573         err = lu_global_init();
 574         if (err)
 575                 return err;
 576
 577         err = cl_global_init();
 578         if (err != 0)
 579                 return err;
 580
 581
 582         err = llog_info_init();
 583         if (err)
 584                 return err;
 585
 586         err = lustre_register_fs();
 587
 588         return err;
 589 }
 590
 591 void obd_update_maxusage(void)
 592 {
 593         __u64 max1, max2;
 594
 595         max1 = obd_pages_sum();
 596         max2 = obd_memory_sum();
 597
 598         spin_lock(&obd_updatemax_lock);
 599         if (max1 > obd_max_pages)
 600                 obd_max_pages = max1;
 601         if (max2 > obd_max_alloc)
 602                 obd_max_alloc = max2;
 603         spin_unlock(&obd_updatemax_lock);
 604 }
 605 EXPORT_SYMBOL(obd_update_maxusage);
 606
 607 #ifdef LPROCFS
 608 __u64 obd_memory_max(void)
 609 {
 610         __u64 ret;
 611
 612         spin_lock(&obd_updatemax_lock);
 613         ret = obd_max_alloc;
 614         spin_unlock(&obd_updatemax_lock);
 615
 616         return ret;
 617 }
 618 EXPORT_SYMBOL(obd_memory_max);
 619
 620 __u64 obd_pages_max(void)
 621 {
 622         __u64 ret;
 623
 624         spin_lock(&obd_updatemax_lock);
 625         ret = obd_max_pages;
 626         spin_unlock(&obd_updatemax_lock);
 627
 628         return ret;
 629 }
 630 EXPORT_SYMBOL(obd_pages_max);
 631 #endif
 632
 633 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 634  * ifdef to the end of the file to cover module and versioning goo.*/
 635 static void cleanup_obdclass(void)
 636 {
 637         int i;
 638         int lustre_unregister_fs(void);
 639         __u64 memory_leaked, pages_leaked;
 640         __u64 memory_max, pages_max;
 641         ENTRY;
 642
 643         lustre_unregister_fs();
 644
 645         misc_deregister(&obd_psdev);
 646         for (i = 0; i < class_devno_max(); i++) {
 647                 struct obd_device *obd = class_num2obd(i);
 648                 if (obd && obd->obd_set_up &&
 649                     OBT(obd) && OBP(obd, detach)) {
 650                         /* XXX should this call generic detach otherwise? */
 651                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 652                         OBP(obd, detach)(obd);
 653                 }
 654         }
 655         llog_info_fini();
 656         cl_global_fini();
 657         lu_global_fini();
 658
 659         obd_cleanup_caches();
 660         obd_sysctl_clean();
 661
 662         class_procfs_clean();
 663
 664         class_handle_cleanup();
 665         class_exit_uuidlist();
 666         obd_zombie_impexp_stop();
 667
 668         memory_leaked = obd_memory_sum();
 669         pages_leaked = obd_pages_sum();
 670
 671         memory_max = obd_memory_max();
 672         pages_max = obd_pages_max();
 673
 674         lprocfs_free_stats(&obd_memory);
 675         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 676                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 677                memory_max, memory_leaked);
 678         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 679                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 680                pages_max, pages_leaked);
 681
 682         EXIT;
 683 }
 684
 685 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 686 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 687 MODULE_LICENSE("GPL");
 688
 689 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);