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(),
 126                          from_kuid(&init_user_ns, current_fsuid()));
 127                 RETURN(0);
 128         }
 129
 130         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 131         if (rc) {
 132                 if (rc == -EOVERFLOW) {
 133                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 134                          * variable length strings instead of just numbers), it
 135                          * might make sense to keep the unique parts for JobID,
 136                          * instead of just returning an error.  That means a
 137                          * larger temp buffer for cfs_get_environ(), then
 138                          * truncating the string at some separator to fit into
 139                          * the specified jobid_len.  Fix later if needed. */
 140                         static bool printed;
 141                         if (unlikely(!printed)) {
 142                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 143                                                    "for JobID buffer (%d)\n",
 144                                                    obd_jobid_var, jobid_len);
 145                                 printed = true;
 146                         }
 147                 } else {
 148                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 149                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 150                                "Get jobid for (%s) failed: rc = %d\n",
 151                                obd_jobid_var, rc);
 152                 }
 153         }
 154         RETURN(rc);
 155 }
 156 EXPORT_SYMBOL(lustre_get_jobid);
 157
 158 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 159                    size_t size, const char *file, int line)
 160 {
 161         if (ptr == NULL ||
 162             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 163                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 164                        ptr ? "force " :"", type, name, (__u64)size, file,
 165                        line);
 166                 CERROR(LPU64" total bytes and "LPU64" total pages "
 167                        "("LPU64" bytes) allocated by Lustre, "
 168                        "%d total bytes by LNET\n",
 169                        obd_memory_sum(),
 170                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 171                        obd_pages_sum(),
 172                         atomic_read(&libcfs_kmemory));
 173                 return 1;
 174         }
 175         return 0;
 176 }
 177 EXPORT_SYMBOL(obd_alloc_fail);
 178
 179 static inline void obd_data2conn(struct lustre_handle *conn,
 180                                  struct obd_ioctl_data *data)
 181 {
 182         memset(conn, 0, sizeof *conn);
 183         conn->cookie = data->ioc_cookie;
 184 }
 185
 186 static inline void obd_conn2data(struct obd_ioctl_data *data,
 187                                  struct lustre_handle *conn)
 188 {
 189         data->ioc_cookie = conn->cookie;
 190 }
 191
 192 int class_resolve_dev_name(__u32 len, const char *name)
 193 {
 194         int rc;
 195         int dev;
 196
 197         ENTRY;
 198         if (!len || !name) {
 199                 CERROR("No name passed,!\n");
 200                 GOTO(out, rc = -EINVAL);
 201         }
 202         if (name[len - 1] != 0) {
 203                 CERROR("Name not nul terminated!\n");
 204                 GOTO(out, rc = -EINVAL);
 205         }
 206
 207         CDEBUG(D_IOCTL, "device name %s\n", name);
 208         dev = class_name2dev(name);
 209         if (dev == -1) {
 210                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 211                 GOTO(out, rc = -EINVAL);
 212         }
 213
 214         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 215         rc = dev;
 216
 217 out:
 218         RETURN(rc);
 219 }
 220
 221 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 222 {
 223         char *buf = NULL;
 224         struct obd_ioctl_data *data;
 225         struct libcfs_debug_ioctl_data *debug_data;
 226         struct obd_device *obd = NULL;
 227         int err = 0, len = 0;
 228         ENTRY;
 229
 230         /* only for debugging */
 231         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 232                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 233                 libcfs_subsystem_debug = debug_data->subs;
 234                 libcfs_debug = debug_data->debug;
 235                 return 0;
 236         }
 237
 238         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 239         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 240                 CERROR("OBD ioctl: data error\n");
 241                 RETURN(-EINVAL);
 242         }
 243         data = (struct obd_ioctl_data *)buf;
 244
 245         switch (cmd) {
 246         case OBD_IOC_PROCESS_CFG: {
 247                 struct lustre_cfg *lcfg;
 248
 249                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 250                         CERROR("No config buffer passed!\n");
 251                         GOTO(out, err = -EINVAL);
 252                 }
 253                 OBD_ALLOC(lcfg, data->ioc_plen1);
 254                 if (lcfg == NULL)
 255                         GOTO(out, err = -ENOMEM);
 256                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 257                                          data->ioc_plen1);
 258                 if (!err)
 259                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 260                 if (!err)
 261                         err = class_process_config(lcfg);
 262
 263                 OBD_FREE(lcfg, data->ioc_plen1);
 264                 GOTO(out, err);
 265         }
 266
 267         case OBD_GET_VERSION:
 268                 if (!data->ioc_inlbuf1) {
 269                         CERROR("No buffer passed in ioctl\n");
 270                         GOTO(out, err = -EINVAL);
 271                 }
 272
 273                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 274                         CERROR("ioctl buffer too small to hold version\n");
 275                         GOTO(out, err = -EINVAL);
 276                 }
 277
 278                 memcpy(data->ioc_bulk, BUILD_VERSION,
 279                        strlen(BUILD_VERSION) + 1);
 280
 281                 err = obd_ioctl_popdata((void *)arg, data, len);
 282                 if (err)
 283                         err = -EFAULT;
 284                 GOTO(out, err);
 285
 286         case OBD_IOC_NAME2DEV: {
 287                 /* Resolve a device name.  This does not change the
 288                  * currently selected device.
 289                  */
 290                 int dev;
 291
 292                 dev = class_resolve_dev_name(data->ioc_inllen1,
 293                                              data->ioc_inlbuf1);
 294                 data->ioc_dev = dev;
 295                 if (dev < 0)
 296                         GOTO(out, err = -EINVAL);
 297
 298                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 299                 if (err)
 300                         err = -EFAULT;
 301                 GOTO(out, err);
 302         }
 303
 304         case OBD_IOC_UUID2DEV: {
 305                 /* Resolve a device uuid.  This does not change the
 306                  * currently selected device.
 307                  */
 308                 int dev;
 309                 struct obd_uuid uuid;
 310
 311                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 312                         CERROR("No UUID passed!\n");
 313                         GOTO(out, err = -EINVAL);
 314                 }
 315                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 316                         CERROR("UUID not NUL terminated!\n");
 317                         GOTO(out, err = -EINVAL);
 318                 }
 319
 320                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 321                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 322                 dev = class_uuid2dev(&uuid);
 323                 data->ioc_dev = dev;
 324                 if (dev == -1) {
 325                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 326                                data->ioc_inlbuf1);
 327                         GOTO(out, err = -EINVAL);
 328                 }
 329
 330                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 331                        dev);
 332                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 333                 if (err)
 334                         err = -EFAULT;
 335                 GOTO(out, err);
 336         }
 337
 338         case OBD_IOC_CLOSE_UUID: {
 339                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 340                        data->ioc_inlbuf1);
 341                 GOTO(out, err = 0);
 342         }
 343
 344         case OBD_IOC_GETDEVICE: {
 345                 int     index = data->ioc_count;
 346                 char    *status, *str;
 347
 348                 if (!data->ioc_inlbuf1) {
 349                         CERROR("No buffer passed in ioctl\n");
 350                         GOTO(out, err = -EINVAL);
 351                 }
 352                 if (data->ioc_inllen1 < 128) {
 353                         CERROR("ioctl buffer too small to hold version\n");
 354                         GOTO(out, err = -EINVAL);
 355                 }
 356
 357                 obd = class_num2obd(index);
 358                 if (!obd)
 359                         GOTO(out, err = -ENOENT);
 360
 361                 if (obd->obd_stopping)
 362                         status = "ST";
 363                 else if (obd->obd_set_up)
 364                         status = "UP";
 365                 else if (obd->obd_attached)
 366                         status = "AT";
 367                 else
 368                         status = "--";
 369                 str = (char *)data->ioc_bulk;
 370                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 371                          (int)index, status, obd->obd_type->typ_name,
 372                          obd->obd_name, obd->obd_uuid.uuid,
 373                          atomic_read(&obd->obd_refcount));
 374                 err = obd_ioctl_popdata((void *)arg, data, len);
 375
 376                 GOTO(out, err = 0);
 377         }
 378
 379         }
 380
 381         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 382                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 383                         GOTO(out, err = -EINVAL);
 384                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 385                         GOTO(out, err = -EINVAL);
 386                 obd = class_name2obd(data->ioc_inlbuf4);
 387         } else if (data->ioc_dev < class_devno_max()) {
 388                 obd = class_num2obd(data->ioc_dev);
 389         } else {
 390                 CERROR("OBD ioctl: No device\n");
 391                 GOTO(out, err = -EINVAL);
 392         }
 393
 394         if (obd == NULL) {
 395                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 396                 GOTO(out, err = -EINVAL);
 397         }
 398         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 399
 400         if (!obd->obd_set_up || obd->obd_stopping) {
 401                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 402                 GOTO(out, err = -EINVAL);
 403         }
 404
 405         switch(cmd) {
 406         case OBD_IOC_NO_TRANSNO: {
 407                 if (!obd->obd_attached) {
 408                         CERROR("Device %d not attached\n", obd->obd_minor);
 409                         GOTO(out, err = -ENODEV);
 410                 }
 411                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 412                        obd->obd_name);
 413                 obd->obd_no_transno = 1;
 414                 GOTO(out, err = 0);
 415         }
 416
 417         default: {
 418                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 419                 if (err)
 420                         GOTO(out, err);
 421
 422                 err = obd_ioctl_popdata((void *)arg, data, len);
 423                 if (err)
 424                         err = -EFAULT;
 425                 GOTO(out, err);
 426         }
 427         }
 428
 429  out:
 430         if (buf)
 431                 obd_ioctl_freedata(buf, len);
 432         RETURN(err);
 433 } /* class_handle_ioctl */
 434
 435 extern psdev_t obd_psdev;
 436
 437 #define OBD_INIT_CHECK
 438 int obd_init_checks(void)
 439 {
 440         __u64 u64val, div64val;
 441         char buf[64];
 442         int len, ret = 0;
 443
 444         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 445
 446         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 447
 448         u64val = OBD_OBJECT_EOF;
 449         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 450         if (u64val != OBD_OBJECT_EOF) {
 451                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 452                        u64val, (int)sizeof(u64val));
 453                 ret = -EINVAL;
 454         }
 455         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 456         if (len != 18) {
 457                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 458                 ret = -EINVAL;
 459         }
 460
 461         div64val = OBD_OBJECT_EOF;
 462         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 463         if (u64val != OBD_OBJECT_EOF) {
 464                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 465                        u64val, (int)sizeof(u64val));
 466                 ret = -EOVERFLOW;
 467         }
 468         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 469                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 470                        u64val, (int)sizeof(u64val));
 471                 return -EOVERFLOW;
 472         }
 473         if (do_div(div64val, 256) != (u64val & 255)) {
 474                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 475                 return -EOVERFLOW;
 476         }
 477         if (u64val >> 8 != div64val) {
 478                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 479                        u64val, div64val, u64val >> 8);
 480                 return -EOVERFLOW;
 481         }
 482         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 483         if (len != 18) {
 484                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 485                 ret = -EINVAL;
 486         }
 487         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 488         if (len != 20) {
 489                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 490                 ret = -EINVAL;
 491         }
 492         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 493         if (len != 2) {
 494                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 495                 ret = -EINVAL;
 496         }
 497         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 498                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 499                       (__u64)PAGE_CACHE_SIZE);
 500                 ret = -EINVAL;
 501         }
 502
 503         return ret;
 504 }
 505
 506 extern spinlock_t obd_types_lock;
 507 extern int class_procfs_init(void);
 508 extern int class_procfs_clean(void);
 509
 510 static int __init init_obdclass(void)
 511 {
 512         int i, err;
 513         int lustre_register_fs(void);
 514
 515         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 516                 INIT_LIST_HEAD(&capa_list[i]);
 517
 518         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 519
 520         spin_lock_init(&obd_types_lock);
 521         obd_zombie_impexp_init();
 522 #ifdef LPROCFS
 523         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 524                                          LPROCFS_STATS_FLAG_NONE |
 525                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 526         if (obd_memory == NULL) {
 527                 CERROR("kmalloc of 'obd_memory' failed\n");
 528                 RETURN(-ENOMEM);
 529         }
 530
 531         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 532                              LPROCFS_CNTR_AVGMINMAX,
 533                              "memused", "bytes");
 534         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 535                              LPROCFS_CNTR_AVGMINMAX,
 536                              "pagesused", "pages");
 537 #endif
 538         err = obd_init_checks();
 539         if (err == -EOVERFLOW)
 540                 return err;
 541
 542         class_init_uuidlist();
 543         err = class_handle_init();
 544         if (err)
 545                 return err;
 546
 547         INIT_LIST_HEAD(&obd_types);
 548
 549         err = misc_register(&obd_psdev);
 550         if (err) {
 551                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 552                 return err;
 553         }
 554
 555         /* This struct is already zeroed for us (static global) */
 556         for (i = 0; i < class_devno_max(); i++)
 557                 obd_devs[i] = NULL;
 558
 559         /* Default the dirty page cache cap to 1/2 of system memory.
 560          * For clients with less memory, a larger fraction is needed
 561          * for other purposes (mostly for BGL). */
 562         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 563                 obd_max_dirty_pages = totalram_pages / 4;
 564         else
 565                 obd_max_dirty_pages = totalram_pages / 2;
 566
 567         err = obd_init_caches();
 568         if (err)
 569                 return err;
 570         err = class_procfs_init();
 571         if (err)
 572                 return err;
 573
 574         err = lu_global_init();
 575         if (err)
 576                 return err;
 577
 578         err = cl_global_init();
 579         if (err != 0)
 580                 return err;
 581
 582
 583         err = llog_info_init();
 584         if (err)
 585                 return err;
 586
 587         err = lustre_register_fs();
 588
 589         return err;
 590 }
 591
 592 void obd_update_maxusage(void)
 593 {
 594         __u64 max1, max2;
 595
 596         max1 = obd_pages_sum();
 597         max2 = obd_memory_sum();
 598
 599         spin_lock(&obd_updatemax_lock);
 600         if (max1 > obd_max_pages)
 601                 obd_max_pages = max1;
 602         if (max2 > obd_max_alloc)
 603                 obd_max_alloc = max2;
 604         spin_unlock(&obd_updatemax_lock);
 605 }
 606 EXPORT_SYMBOL(obd_update_maxusage);
 607
 608 #ifdef LPROCFS
 609 __u64 obd_memory_max(void)
 610 {
 611         __u64 ret;
 612
 613         spin_lock(&obd_updatemax_lock);
 614         ret = obd_max_alloc;
 615         spin_unlock(&obd_updatemax_lock);
 616
 617         return ret;
 618 }
 619 EXPORT_SYMBOL(obd_memory_max);
 620
 621 __u64 obd_pages_max(void)
 622 {
 623         __u64 ret;
 624
 625         spin_lock(&obd_updatemax_lock);
 626         ret = obd_max_pages;
 627         spin_unlock(&obd_updatemax_lock);
 628
 629         return ret;
 630 }
 631 EXPORT_SYMBOL(obd_pages_max);
 632 #endif
 633
 634 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 635  * ifdef to the end of the file to cover module and versioning goo.*/
 636 static void cleanup_obdclass(void)
 637 {
 638         int i;
 639         int lustre_unregister_fs(void);
 640         __u64 memory_leaked, pages_leaked;
 641         __u64 memory_max, pages_max;
 642         ENTRY;
 643
 644         lustre_unregister_fs();
 645
 646         misc_deregister(&obd_psdev);
 647         for (i = 0; i < class_devno_max(); i++) {
 648                 struct obd_device *obd = class_num2obd(i);
 649                 if (obd && obd->obd_set_up &&
 650                     OBT(obd) && OBP(obd, detach)) {
 651                         /* XXX should this call generic detach otherwise? */
 652                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 653                         OBP(obd, detach)(obd);
 654                 }
 655         }
 656         llog_info_fini();
 657         cl_global_fini();
 658         lu_global_fini();
 659
 660         obd_cleanup_caches();
 661         obd_sysctl_clean();
 662
 663         class_procfs_clean();
 664
 665         class_handle_cleanup();
 666         class_exit_uuidlist();
 667         obd_zombie_impexp_stop();
 668
 669         memory_leaked = obd_memory_sum();
 670         pages_leaked = obd_pages_sum();
 671
 672         memory_max = obd_memory_max();
 673         pages_max = obd_pages_max();
 674
 675         lprocfs_free_stats(&obd_memory);
 676         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 677                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 678                memory_max, memory_leaked);
 679         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 680                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 681                pages_max, pages_leaked);
 682
 683         EXIT;
 684 }
 685
 686 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 687 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 688 MODULE_LICENSE("GPL");
 689
 690 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);