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 #ifndef __KERNEL__
  39 # include <liblustre.h>
  40 #else
  41 # include <asm/atomic.h>
  42 #endif
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lnet/lnetctl.h>
  47 #include <lustre_debug.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_build_version.h>
  50 #include <libcfs/list.h>
  51 #include "llog_internal.h"
  52
  53 #ifndef __KERNEL__
  54 /* liblustre workaround */
  55 cfs_atomic_t libcfs_kmemory = {0};
  56 #endif
  57
  58 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  59 EXPORT_SYMBOL(obd_devs);
  60 cfs_list_t obd_types;
  61 DEFINE_RWLOCK(obd_dev_lock);
  62
  63 __u64 obd_max_pages = 0;
  64 __u64 obd_max_alloc = 0;
  65 #ifndef __KERNEL__
  66 __u64 obd_alloc;
  67 __u64 obd_pages;
  68 #endif
  69 DEFINE_SPINLOCK(obd_updatemax_lock);
  70
  71 /* The following are visible and mutable through /proc/sys/lustre/. */
  72 unsigned int obd_alloc_fail_rate = 0;
  73 EXPORT_SYMBOL(obd_alloc_fail_rate);
  74 unsigned int obd_debug_peer_on_timeout;
  75 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  76 unsigned int obd_dump_on_timeout;
  77 EXPORT_SYMBOL(obd_dump_on_timeout);
  78 unsigned int obd_dump_on_eviction;
  79 EXPORT_SYMBOL(obd_dump_on_eviction);
  80 unsigned int obd_max_dirty_pages = 256;
  81 EXPORT_SYMBOL(obd_max_dirty_pages);
  82 cfs_atomic_t obd_dirty_pages;
  83 EXPORT_SYMBOL(obd_dirty_pages);
  84 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  85 EXPORT_SYMBOL(obd_timeout);
  86 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  87 EXPORT_SYMBOL(ldlm_timeout);
  88 unsigned int obd_timeout_set;
  89 EXPORT_SYMBOL(obd_timeout_set);
  90 unsigned int ldlm_timeout_set;
  91 EXPORT_SYMBOL(ldlm_timeout_set);
  92 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  93 unsigned int at_min = 0;
  94 EXPORT_SYMBOL(at_min);
  95 unsigned int at_max = 600;
  96 EXPORT_SYMBOL(at_max);
  97 unsigned int at_history = 600;
  98 EXPORT_SYMBOL(at_history);
  99 int at_early_margin = 5;
 100 EXPORT_SYMBOL(at_early_margin);
 101 int at_extra = 30;
 102 EXPORT_SYMBOL(at_extra);
 103
 104 cfs_atomic_t obd_dirty_transit_pages;
 105 EXPORT_SYMBOL(obd_dirty_transit_pages);
 106
 107 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 108 EXPORT_SYMBOL(obd_jobid_var);
 109
 110 /* Get jobid of current process by reading the environment variable
 111  * stored in between the "env_start" & "env_end" of task struct.
 112  *
 113  * TODO:
 114  * It's better to cache the jobid for later use if there is any
 115  * efficient way, the cl_env code probably could be reused for this
 116  * purpose.
 117  *
 118  * If some job scheduler doesn't store jobid in the "env_start/end",
 119  * then an upcall could be issued here to get the jobid by utilizing
 120  * the userspace tools/api. Then, the jobid must be cached.
 121  */
 122 int lustre_get_jobid(char *jobid)
 123 {
 124         int jobid_len = JOBSTATS_JOBID_SIZE;
 125         int rc = 0;
 126         ENTRY;
 127
 128         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 129         /* Jobstats isn't enabled */
 130         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 131                 RETURN(0);
 132
 133         /* Use process name + fsuid as jobid */
 134         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 135                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 136                          cfs_curproc_comm(), cfs_curproc_fsuid());
 137                 RETURN(0);
 138         }
 139
 140         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 141         if (rc) {
 142                 if (rc == -EOVERFLOW) {
 143                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 144                          * variable length strings instead of just numbers), it
 145                          * might make sense to keep the unique parts for JobID,
 146                          * instead of just returning an error.  That means a
 147                          * larger temp buffer for cfs_get_environ(), then
 148                          * truncating the string at some separator to fit into
 149                          * the specified jobid_len.  Fix later if needed. */
 150                         static bool printed;
 151                         if (unlikely(!printed)) {
 152                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 153                                                    "for JobID buffer (%d)\n",
 154                                                    obd_jobid_var, jobid_len);
 155                                 printed = true;
 156                         }
 157                 } else {
 158                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 159                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 160                                "Get jobid for (%s) failed: rc = %d\n",
 161                                obd_jobid_var, rc);
 162                 }
 163         }
 164         RETURN(rc);
 165 }
 166 EXPORT_SYMBOL(lustre_get_jobid);
 167
 168 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 169                    size_t size, const char *file, int line)
 170 {
 171         if (ptr == NULL ||
 172             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 173                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 174                        ptr ? "force " :"", type, name, (__u64)size, file,
 175                        line);
 176                 CERROR(LPU64" total bytes and "LPU64" total pages "
 177                        "("LPU64" bytes) allocated by Lustre, "
 178                        "%d total bytes by LNET\n",
 179                        obd_memory_sum(),
 180                        obd_pages_sum() << CFS_PAGE_SHIFT,
 181                        obd_pages_sum(),
 182                         cfs_atomic_read(&libcfs_kmemory));
 183                 return 1;
 184         }
 185         return 0;
 186 }
 187 EXPORT_SYMBOL(obd_alloc_fail);
 188
 189 static inline void obd_data2conn(struct lustre_handle *conn,
 190                                  struct obd_ioctl_data *data)
 191 {
 192         memset(conn, 0, sizeof *conn);
 193         conn->cookie = data->ioc_cookie;
 194 }
 195
 196 static inline void obd_conn2data(struct obd_ioctl_data *data,
 197                                  struct lustre_handle *conn)
 198 {
 199         data->ioc_cookie = conn->cookie;
 200 }
 201
 202 int class_resolve_dev_name(__u32 len, const char *name)
 203 {
 204         int rc;
 205         int dev;
 206
 207         ENTRY;
 208         if (!len || !name) {
 209                 CERROR("No name passed,!\n");
 210                 GOTO(out, rc = -EINVAL);
 211         }
 212         if (name[len - 1] != 0) {
 213                 CERROR("Name not nul terminated!\n");
 214                 GOTO(out, rc = -EINVAL);
 215         }
 216
 217         CDEBUG(D_IOCTL, "device name %s\n", name);
 218         dev = class_name2dev(name);
 219         if (dev == -1) {
 220                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 221                 GOTO(out, rc = -EINVAL);
 222         }
 223
 224         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 225         rc = dev;
 226
 227 out:
 228         RETURN(rc);
 229 }
 230
 231 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 232 {
 233         char *buf = NULL;
 234         struct obd_ioctl_data *data;
 235         struct libcfs_debug_ioctl_data *debug_data;
 236         struct obd_device *obd = NULL;
 237         int err = 0, len = 0;
 238         ENTRY;
 239
 240         /* only for debugging */
 241         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 242                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 243                 libcfs_subsystem_debug = debug_data->subs;
 244                 libcfs_debug = debug_data->debug;
 245                 return 0;
 246         }
 247
 248         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 249         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 250                 CERROR("OBD ioctl: data error\n");
 251                 RETURN(-EINVAL);
 252         }
 253         data = (struct obd_ioctl_data *)buf;
 254
 255         switch (cmd) {
 256         case OBD_IOC_PROCESS_CFG: {
 257                 struct lustre_cfg *lcfg;
 258
 259                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 260                         CERROR("No config buffer passed!\n");
 261                         GOTO(out, err = -EINVAL);
 262                 }
 263                 OBD_ALLOC(lcfg, data->ioc_plen1);
 264                 if (lcfg == NULL)
 265                         GOTO(out, err = -ENOMEM);
 266                 err = cfs_copy_from_user(lcfg, data->ioc_pbuf1,
 267                                          data->ioc_plen1);
 268                 if (!err)
 269                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 270                 if (!err)
 271                         err = class_process_config(lcfg);
 272
 273                 OBD_FREE(lcfg, data->ioc_plen1);
 274                 GOTO(out, err);
 275         }
 276
 277         case OBD_GET_VERSION:
 278                 if (!data->ioc_inlbuf1) {
 279                         CERROR("No buffer passed in ioctl\n");
 280                         GOTO(out, err = -EINVAL);
 281                 }
 282
 283                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 284                         CERROR("ioctl buffer too small to hold version\n");
 285                         GOTO(out, err = -EINVAL);
 286                 }
 287
 288                 memcpy(data->ioc_bulk, BUILD_VERSION,
 289                        strlen(BUILD_VERSION) + 1);
 290
 291                 err = obd_ioctl_popdata((void *)arg, data, len);
 292                 if (err)
 293                         err = -EFAULT;
 294                 GOTO(out, err);
 295
 296         case OBD_IOC_NAME2DEV: {
 297                 /* Resolve a device name.  This does not change the
 298                  * currently selected device.
 299                  */
 300                 int dev;
 301
 302                 dev = class_resolve_dev_name(data->ioc_inllen1,
 303                                              data->ioc_inlbuf1);
 304                 data->ioc_dev = dev;
 305                 if (dev < 0)
 306                         GOTO(out, err = -EINVAL);
 307
 308                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 309                 if (err)
 310                         err = -EFAULT;
 311                 GOTO(out, err);
 312         }
 313
 314         case OBD_IOC_UUID2DEV: {
 315                 /* Resolve a device uuid.  This does not change the
 316                  * currently selected device.
 317                  */
 318                 int dev;
 319                 struct obd_uuid uuid;
 320
 321                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 322                         CERROR("No UUID passed!\n");
 323                         GOTO(out, err = -EINVAL);
 324                 }
 325                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 326                         CERROR("UUID not NUL terminated!\n");
 327                         GOTO(out, err = -EINVAL);
 328                 }
 329
 330                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 331                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 332                 dev = class_uuid2dev(&uuid);
 333                 data->ioc_dev = dev;
 334                 if (dev == -1) {
 335                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 336                                data->ioc_inlbuf1);
 337                         GOTO(out, err = -EINVAL);
 338                 }
 339
 340                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 341                        dev);
 342                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 343                 if (err)
 344                         err = -EFAULT;
 345                 GOTO(out, err);
 346         }
 347
 348         case OBD_IOC_CLOSE_UUID: {
 349                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 350                        data->ioc_inlbuf1);
 351                 GOTO(out, err = 0);
 352         }
 353
 354         case OBD_IOC_GETDEVICE: {
 355                 int     index = data->ioc_count;
 356                 char    *status, *str;
 357
 358                 if (!data->ioc_inlbuf1) {
 359                         CERROR("No buffer passed in ioctl\n");
 360                         GOTO(out, err = -EINVAL);
 361                 }
 362                 if (data->ioc_inllen1 < 128) {
 363                         CERROR("ioctl buffer too small to hold version\n");
 364                         GOTO(out, err = -EINVAL);
 365                 }
 366
 367                 obd = class_num2obd(index);
 368                 if (!obd)
 369                         GOTO(out, err = -ENOENT);
 370
 371                 if (obd->obd_stopping)
 372                         status = "ST";
 373                 else if (obd->obd_set_up)
 374                         status = "UP";
 375                 else if (obd->obd_attached)
 376                         status = "AT";
 377                 else
 378                         status = "--";
 379                 str = (char *)data->ioc_bulk;
 380                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 381                          (int)index, status, obd->obd_type->typ_name,
 382                          obd->obd_name, obd->obd_uuid.uuid,
 383                          cfs_atomic_read(&obd->obd_refcount));
 384                 err = obd_ioctl_popdata((void *)arg, data, len);
 385
 386                 GOTO(out, err = 0);
 387         }
 388
 389         }
 390
 391         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 392                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 393                         GOTO(out, err = -EINVAL);
 394                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 395                         GOTO(out, err = -EINVAL);
 396                 obd = class_name2obd(data->ioc_inlbuf4);
 397         } else if (data->ioc_dev < class_devno_max()) {
 398                 obd = class_num2obd(data->ioc_dev);
 399         } else {
 400                 CERROR("OBD ioctl: No device\n");
 401                 GOTO(out, err = -EINVAL);
 402         }
 403
 404         if (obd == NULL) {
 405                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 406                 GOTO(out, err = -EINVAL);
 407         }
 408         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 409
 410         if (!obd->obd_set_up || obd->obd_stopping) {
 411                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 412                 GOTO(out, err = -EINVAL);
 413         }
 414
 415         switch(cmd) {
 416         case OBD_IOC_NO_TRANSNO: {
 417                 if (!obd->obd_attached) {
 418                         CERROR("Device %d not attached\n", obd->obd_minor);
 419                         GOTO(out, err = -ENODEV);
 420                 }
 421                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 422                        obd->obd_name);
 423                 obd->obd_no_transno = 1;
 424                 GOTO(out, err = 0);
 425         }
 426
 427         default: {
 428                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 429                 if (err)
 430                         GOTO(out, err);
 431
 432                 err = obd_ioctl_popdata((void *)arg, data, len);
 433                 if (err)
 434                         err = -EFAULT;
 435                 GOTO(out, err);
 436         }
 437         }
 438
 439  out:
 440         if (buf)
 441                 obd_ioctl_freedata(buf, len);
 442         RETURN(err);
 443 } /* class_handle_ioctl */
 444
 445 #ifdef __KERNEL__
 446 extern cfs_psdev_t obd_psdev;
 447 #else
 448 void *obd_psdev = NULL;
 449 #endif
 450
 451 #define OBD_INIT_CHECK
 452 #ifdef OBD_INIT_CHECK
 453 int obd_init_checks(void)
 454 {
 455         __u64 u64val, div64val;
 456         char buf[64];
 457         int len, ret = 0;
 458
 459         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 460
 461         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 462
 463         u64val = OBD_OBJECT_EOF;
 464         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 465         if (u64val != OBD_OBJECT_EOF) {
 466                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 467                        u64val, (int)sizeof(u64val));
 468                 ret = -EINVAL;
 469         }
 470         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 471         if (len != 18) {
 472                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 473                 ret = -EINVAL;
 474         }
 475
 476         div64val = OBD_OBJECT_EOF;
 477         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 478         if (u64val != OBD_OBJECT_EOF) {
 479                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 480                        u64val, (int)sizeof(u64val));
 481                 ret = -EOVERFLOW;
 482         }
 483         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 484                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 485                        u64val, (int)sizeof(u64val));
 486                 return -EOVERFLOW;
 487         }
 488         if (do_div(div64val, 256) != (u64val & 255)) {
 489                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 490                 return -EOVERFLOW;
 491         }
 492         if (u64val >> 8 != div64val) {
 493                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 494                        u64val, div64val, u64val >> 8);
 495                 return -EOVERFLOW;
 496         }
 497         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 498         if (len != 18) {
 499                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 500                 ret = -EINVAL;
 501         }
 502         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 503         if (len != 20) {
 504                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 505                 ret = -EINVAL;
 506         }
 507         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 508         if (len != 2) {
 509                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 510                 ret = -EINVAL;
 511         }
 512         if ((u64val & ~CFS_PAGE_MASK) >= CFS_PAGE_SIZE) {
 513                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 514                       (__u64)CFS_PAGE_SIZE);
 515                 ret = -EINVAL;
 516         }
 517
 518         return ret;
 519 }
 520 #else
 521 #define obd_init_checks() do {} while(0)
 522 #endif
 523
 524 extern spinlock_t obd_types_lock;
 525 extern int class_procfs_init(void);
 526 extern int class_procfs_clean(void);
 527
 528 #ifdef __KERNEL__
 529 static int __init init_obdclass(void)
 530 #else
 531 int init_obdclass(void)
 532 #endif
 533 {
 534         int i, err;
 535 #ifdef __KERNEL__
 536         int lustre_register_fs(void);
 537
 538         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 539                 CFS_INIT_LIST_HEAD(&capa_list[i]);
 540 #endif
 541
 542         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 543
 544         spin_lock_init(&obd_types_lock);
 545         obd_zombie_impexp_init();
 546 #ifdef LPROCFS
 547         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 548                                          LPROCFS_STATS_FLAG_NONE |
 549                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 550         if (obd_memory == NULL) {
 551                 CERROR("kmalloc of 'obd_memory' failed\n");
 552                 RETURN(-ENOMEM);
 553         }
 554
 555         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 556                              LPROCFS_CNTR_AVGMINMAX,
 557                              "memused", "bytes");
 558         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 559                              LPROCFS_CNTR_AVGMINMAX,
 560                              "pagesused", "pages");
 561 #endif
 562         err = obd_init_checks();
 563         if (err == -EOVERFLOW)
 564                 return err;
 565
 566         class_init_uuidlist();
 567         err = class_handle_init();
 568         if (err)
 569                 return err;
 570
 571         CFS_INIT_LIST_HEAD(&obd_types);
 572
 573         err = cfs_psdev_register(&obd_psdev);
 574         if (err) {
 575                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 576                 return err;
 577         }
 578
 579         /* This struct is already zeroed for us (static global) */
 580         for (i = 0; i < class_devno_max(); i++)
 581                 obd_devs[i] = NULL;
 582
 583         /* Default the dirty page cache cap to 1/2 of system memory.
 584          * For clients with less memory, a larger fraction is needed
 585          * for other purposes (mostly for BGL). */
 586         if (cfs_num_physpages <= 512 << (20 - CFS_PAGE_SHIFT))
 587                 obd_max_dirty_pages = cfs_num_physpages / 4;
 588         else
 589                 obd_max_dirty_pages = cfs_num_physpages / 2;
 590
 591         err = obd_init_caches();
 592         if (err)
 593                 return err;
 594 #ifdef __KERNEL__
 595         err = class_procfs_init();
 596         if (err)
 597                 return err;
 598 #endif
 599
 600         err = lu_global_init();
 601         if (err)
 602                 return err;
 603
 604         err = llog_info_init();
 605         if (err)
 606                 return err;
 607
 608 #ifdef __KERNEL__
 609         err = lustre_register_fs();
 610 #endif
 611
 612         return err;
 613 }
 614
 615 void obd_update_maxusage(void)
 616 {
 617         __u64 max1, max2;
 618
 619         max1 = obd_pages_sum();
 620         max2 = obd_memory_sum();
 621
 622         spin_lock(&obd_updatemax_lock);
 623         if (max1 > obd_max_pages)
 624                 obd_max_pages = max1;
 625         if (max2 > obd_max_alloc)
 626                 obd_max_alloc = max2;
 627         spin_unlock(&obd_updatemax_lock);
 628 }
 629 EXPORT_SYMBOL(obd_update_maxusage);
 630
 631 #ifdef LPROCFS
 632 __u64 obd_memory_max(void)
 633 {
 634         __u64 ret;
 635
 636         spin_lock(&obd_updatemax_lock);
 637         ret = obd_max_alloc;
 638         spin_unlock(&obd_updatemax_lock);
 639
 640         return ret;
 641 }
 642 EXPORT_SYMBOL(obd_memory_max);
 643
 644 __u64 obd_pages_max(void)
 645 {
 646         __u64 ret;
 647
 648         spin_lock(&obd_updatemax_lock);
 649         ret = obd_max_pages;
 650         spin_unlock(&obd_updatemax_lock);
 651
 652         return ret;
 653 }
 654 EXPORT_SYMBOL(obd_pages_max);
 655 #endif
 656
 657 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 658  * ifdef to the end of the file to cover module and versioning goo.*/
 659 #ifdef __KERNEL__
 660 static void cleanup_obdclass(void)
 661 {
 662         int i;
 663         int lustre_unregister_fs(void);
 664         __u64 memory_leaked, pages_leaked;
 665         __u64 memory_max, pages_max;
 666         ENTRY;
 667
 668         lustre_unregister_fs();
 669
 670         cfs_psdev_deregister(&obd_psdev);
 671         for (i = 0; i < class_devno_max(); i++) {
 672                 struct obd_device *obd = class_num2obd(i);
 673                 if (obd && obd->obd_set_up &&
 674                     OBT(obd) && OBP(obd, detach)) {
 675                         /* XXX should this call generic detach otherwise? */
 676                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 677                         OBP(obd, detach)(obd);
 678                 }
 679         }
 680         llog_info_fini();
 681         lu_global_fini();
 682
 683         obd_cleanup_caches();
 684         obd_sysctl_clean();
 685
 686         class_procfs_clean();
 687
 688         class_handle_cleanup();
 689         class_exit_uuidlist();
 690         obd_zombie_impexp_stop();
 691
 692         memory_leaked = obd_memory_sum();
 693         pages_leaked = obd_pages_sum();
 694
 695         memory_max = obd_memory_max();
 696         pages_max = obd_pages_max();
 697
 698         lprocfs_free_stats(&obd_memory);
 699         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 700                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 701                memory_max, memory_leaked);
 702         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 703                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 704                pages_max, pages_leaked);
 705
 706         EXIT;
 707 }
 708
 709 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 710 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 711 MODULE_LICENSE("GPL");
 712
 713 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 714 #endif