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, 2015, 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 <linux/atomic.h>
  39
  40 #include "../include/obd_support.h"
  41 #include "../include/obd_class.h"
  42 #include "../../include/linux/lnet/lnetctl.h"
  43 #include "../include/lustre_debug.h"
  44 #include "../include/lprocfs_status.h"
  45 #include <linux/list.h>
  46 #include "../include/cl_object.h"
  47 #include "llog_internal.h"
  48
  49 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  50 EXPORT_SYMBOL(obd_devs);
  51 struct list_head obd_types;
  52 DEFINE_RWLOCK(obd_dev_lock);
  53
  54 /* The following are visible and mutable through /sys/fs/lustre. */
  55 unsigned int obd_debug_peer_on_timeout;
  56 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  57 unsigned int obd_dump_on_timeout;
  58 EXPORT_SYMBOL(obd_dump_on_timeout);
  59 unsigned int obd_dump_on_eviction;
  60 EXPORT_SYMBOL(obd_dump_on_eviction);
  61 unsigned int obd_max_dirty_pages = 256;
  62 EXPORT_SYMBOL(obd_max_dirty_pages);
  63 atomic_t obd_dirty_pages;
  64 EXPORT_SYMBOL(obd_dirty_pages);
  65 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  66 EXPORT_SYMBOL(obd_timeout);
  67 unsigned int obd_timeout_set;
  68 EXPORT_SYMBOL(obd_timeout_set);
  69 /* Adaptive timeout defs here instead of ptlrpc module for /sys/fs/ access */
  70 unsigned int at_min;
  71 EXPORT_SYMBOL(at_min);
  72 unsigned int at_max = 600;
  73 EXPORT_SYMBOL(at_max);
  74 unsigned int at_history = 600;
  75 EXPORT_SYMBOL(at_history);
  76 int at_early_margin = 5;
  77 EXPORT_SYMBOL(at_early_margin);
  78 int at_extra = 30;
  79 EXPORT_SYMBOL(at_extra);
  80
  81 atomic_t obd_dirty_transit_pages;
  82 EXPORT_SYMBOL(obd_dirty_transit_pages);
  83
  84 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
  85 EXPORT_SYMBOL(obd_jobid_var);
  86
  87 char obd_jobid_node[JOBSTATS_JOBID_SIZE + 1];
  88
  89 /* Get jobid of current process from stored variable or calculate
  90  * it from pid and user_id.
  91  *
  92  * Historically this was also done by reading the environment variable
  93  * stored in between the "env_start" & "env_end" of task struct.
  94  * This is now deprecated.
  95  */
  96 int lustre_get_jobid(char *jobid)
  97 {
  98         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
  99         /* Jobstats isn't enabled */
 100         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 101                 return 0;
 102
 103         /* Use process name + fsuid as jobid */
 104         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 105                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 106                          current_comm(),
 107                          from_kuid(&init_user_ns, current_fsuid()));
 108                 return 0;
 109         }
 110
 111         /* Whole node dedicated to single job */
 112         if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) {
 113                 strcpy(jobid, obd_jobid_node);
 114                 return 0;
 115         }
 116
 117         return -ENOENT;
 118 }
 119 EXPORT_SYMBOL(lustre_get_jobid);
 120
 121 static inline void obd_data2conn(struct lustre_handle *conn,
 122                                  struct obd_ioctl_data *data)
 123 {
 124         memset(conn, 0, sizeof(*conn));
 125         conn->cookie = data->ioc_cookie;
 126 }
 127
 128 static inline void obd_conn2data(struct obd_ioctl_data *data,
 129                                  struct lustre_handle *conn)
 130 {
 131         data->ioc_cookie = conn->cookie;
 132 }
 133
 134 static int class_resolve_dev_name(__u32 len, const char *name)
 135 {
 136         int rc;
 137         int dev;
 138
 139         if (!len || !name) {
 140                 CERROR("No name passed,!\n");
 141                 rc = -EINVAL;
 142                 goto out;
 143         }
 144         if (name[len - 1] != 0) {
 145                 CERROR("Name not nul terminated!\n");
 146                 rc = -EINVAL;
 147                 goto out;
 148         }
 149
 150         CDEBUG(D_IOCTL, "device name %s\n", name);
 151         dev = class_name2dev(name);
 152         if (dev == -1) {
 153                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 154                 rc = -EINVAL;
 155                 goto out;
 156         }
 157
 158         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 159         rc = dev;
 160
 161 out:
 162         return rc;
 163 }
 164
 165 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 166 {
 167         char *buf = NULL;
 168         struct obd_ioctl_data *data;
 169         struct libcfs_debug_ioctl_data *debug_data;
 170         struct obd_device *obd = NULL;
 171         int err = 0, len = 0;
 172
 173         /* only for debugging */
 174         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 175                 debug_data = (struct libcfs_debug_ioctl_data *)arg;
 176                 libcfs_subsystem_debug = debug_data->subs;
 177                 libcfs_debug = debug_data->debug;
 178                 return 0;
 179         }
 180
 181         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 182         if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 183                 CERROR("OBD ioctl: data error\n");
 184                 return -EINVAL;
 185         }
 186         data = (struct obd_ioctl_data *)buf;
 187
 188         switch (cmd) {
 189         case OBD_IOC_PROCESS_CFG: {
 190                 struct lustre_cfg *lcfg;
 191
 192                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 193                         CERROR("No config buffer passed!\n");
 194                         err = -EINVAL;
 195                         goto out;
 196                 }
 197                 lcfg = kzalloc(data->ioc_plen1, GFP_NOFS);
 198                 if (!lcfg) {
 199                         err = -ENOMEM;
 200                         goto out;
 201                 }
 202                 err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1);
 203                 if (!err)
 204                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 205                 if (!err)
 206                         err = class_process_config(lcfg);
 207
 208                 kfree(lcfg);
 209                 goto out;
 210         }
 211
 212         case OBD_GET_VERSION:
 213                 if (!data->ioc_inlbuf1) {
 214                         CERROR("No buffer passed in ioctl\n");
 215                         err = -EINVAL;
 216                         goto out;
 217                 }
 218
 219                 if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) {
 220                         CERROR("ioctl buffer too small to hold version\n");
 221                         err = -EINVAL;
 222                         goto out;
 223                 }
 224
 225                 memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING,
 226                        strlen(LUSTRE_VERSION_STRING) + 1);
 227
 228                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 229                 if (err)
 230                         err = -EFAULT;
 231                 goto out;
 232
 233         case OBD_IOC_NAME2DEV: {
 234                 /* Resolve a device name.  This does not change the
 235                  * currently selected device.
 236                  */
 237                 int dev;
 238
 239                 dev = class_resolve_dev_name(data->ioc_inllen1,
 240                                              data->ioc_inlbuf1);
 241                 data->ioc_dev = dev;
 242                 if (dev < 0) {
 243                         err = -EINVAL;
 244                         goto out;
 245                 }
 246
 247                 err = obd_ioctl_popdata((void __user *)arg, data,
 248                                         sizeof(*data));
 249                 if (err)
 250                         err = -EFAULT;
 251                 goto out;
 252         }
 253
 254         case OBD_IOC_UUID2DEV: {
 255                 /* Resolve a device uuid.  This does not change the
 256                  * currently selected device.
 257                  */
 258                 int dev;
 259                 struct obd_uuid uuid;
 260
 261                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 262                         CERROR("No UUID passed!\n");
 263                         err = -EINVAL;
 264                         goto out;
 265                 }
 266                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 267                         CERROR("UUID not NUL terminated!\n");
 268                         err = -EINVAL;
 269                         goto out;
 270                 }
 271
 272                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 273                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 274                 dev = class_uuid2dev(&uuid);
 275                 data->ioc_dev = dev;
 276                 if (dev == -1) {
 277                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 278                                data->ioc_inlbuf1);
 279                         err = -EINVAL;
 280                         goto out;
 281                 }
 282
 283                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 284                        dev);
 285                 err = obd_ioctl_popdata((void __user *)arg, data,
 286                                         sizeof(*data));
 287                 if (err)
 288                         err = -EFAULT;
 289                 goto out;
 290         }
 291
 292         case OBD_IOC_CLOSE_UUID: {
 293                 CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n",
 294                        data->ioc_inlbuf1);
 295                 err = 0;
 296                 goto out;
 297         }
 298
 299         case OBD_IOC_GETDEVICE: {
 300                 int     index = data->ioc_count;
 301                 char    *status, *str;
 302
 303                 if (!data->ioc_inlbuf1) {
 304                         CERROR("No buffer passed in ioctl\n");
 305                         err = -EINVAL;
 306                         goto out;
 307                 }
 308                 if (data->ioc_inllen1 < 128) {
 309                         CERROR("ioctl buffer too small to hold version\n");
 310                         err = -EINVAL;
 311                         goto out;
 312                 }
 313
 314                 obd = class_num2obd(index);
 315                 if (!obd) {
 316                         err = -ENOENT;
 317                         goto out;
 318                 }
 319
 320                 if (obd->obd_stopping)
 321                         status = "ST";
 322                 else if (obd->obd_set_up)
 323                         status = "UP";
 324                 else if (obd->obd_attached)
 325                         status = "AT";
 326                 else
 327                         status = "--";
 328                 str = (char *)data->ioc_bulk;
 329                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 330                          (int)index, status, obd->obd_type->typ_name,
 331                          obd->obd_name, obd->obd_uuid.uuid,
 332                          atomic_read(&obd->obd_refcount));
 333                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 334
 335                 err = 0;
 336                 goto out;
 337         }
 338
 339         }
 340
 341         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 342                 if (data->ioc_inllen4 <= 0 || !data->ioc_inlbuf4) {
 343                         err = -EINVAL;
 344                         goto out;
 345                 }
 346                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME) {
 347                         err = -EINVAL;
 348                         goto out;
 349                 }
 350                 obd = class_name2obd(data->ioc_inlbuf4);
 351         } else if (data->ioc_dev < class_devno_max()) {
 352                 obd = class_num2obd(data->ioc_dev);
 353         } else {
 354                 CERROR("OBD ioctl: No device\n");
 355                 err = -EINVAL;
 356                 goto out;
 357         }
 358
 359         if (!obd) {
 360                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 361                 err = -EINVAL;
 362                 goto out;
 363         }
 364         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 365
 366         if (!obd->obd_set_up || obd->obd_stopping) {
 367                 CERROR("OBD ioctl: device not setup %d\n", data->ioc_dev);
 368                 err = -EINVAL;
 369                 goto out;
 370         }
 371
 372         switch (cmd) {
 373         case OBD_IOC_NO_TRANSNO: {
 374                 if (!obd->obd_attached) {
 375                         CERROR("Device %d not attached\n", obd->obd_minor);
 376                         err = -ENODEV;
 377                         goto out;
 378                 }
 379                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 380                        obd->obd_name);
 381                 obd->obd_no_transno = 1;
 382                 err = 0;
 383                 goto out;
 384         }
 385
 386         default: {
 387                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 388                 if (err)
 389                         goto out;
 390
 391                 err = obd_ioctl_popdata((void __user *)arg, data, len);
 392                 if (err)
 393                         err = -EFAULT;
 394                 goto out;
 395         }
 396         }
 397
 398  out:
 399         if (buf)
 400                 obd_ioctl_freedata(buf, len);
 401         return err;
 402 } /* class_handle_ioctl */
 403
 404 #define OBD_INIT_CHECK
 405 static int obd_init_checks(void)
 406 {
 407         __u64 u64val, div64val;
 408         char buf[64];
 409         int len, ret = 0;
 410
 411         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", "%llu", "%lld", "%#llx");
 412
 413         CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF);
 414
 415         u64val = OBD_OBJECT_EOF;
 416         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 417         if (u64val != OBD_OBJECT_EOF) {
 418                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 419                        u64val, (int)sizeof(u64val));
 420                 ret = -EINVAL;
 421         }
 422         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 423         if (len != 18) {
 424                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 425                 ret = -EINVAL;
 426         }
 427
 428         div64val = OBD_OBJECT_EOF;
 429         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val);
 430         if (u64val != OBD_OBJECT_EOF) {
 431                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 432                        u64val, (int)sizeof(u64val));
 433                 ret = -EOVERFLOW;
 434         }
 435         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 436                 CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n",
 437                        u64val, (int)sizeof(u64val));
 438                 return -EOVERFLOW;
 439         }
 440         if (do_div(div64val, 256) != (u64val & 255)) {
 441                 CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255);
 442                 return -EOVERFLOW;
 443         }
 444         if (u64val >> 8 != div64val) {
 445                 CERROR("do_div(%#llx,256) %llu != %llu\n",
 446                        u64val, div64val, u64val >> 8);
 447                 return -EOVERFLOW;
 448         }
 449         len = snprintf(buf, sizeof(buf), "%#llx", u64val);
 450         if (len != 18) {
 451                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 452                 ret = -EINVAL;
 453         }
 454         len = snprintf(buf, sizeof(buf), "%llu", u64val);
 455         if (len != 20) {
 456                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 457                 ret = -EINVAL;
 458         }
 459         len = snprintf(buf, sizeof(buf), "%lld", u64val);
 460         if (len != 2) {
 461                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 462                 ret = -EINVAL;
 463         }
 464         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_SIZE) {
 465                 CWARN("mask failed: u64val %llu >= %llu\n", u64val,
 466                       (__u64)PAGE_SIZE);
 467                 ret = -EINVAL;
 468         }
 469
 470         return ret;
 471 }
 472
 473 extern int class_procfs_init(void);
 474 extern int class_procfs_clean(void);
 475
 476 static int __init obdclass_init(void)
 477 {
 478         int i, err;
 479
 480         int lustre_register_fs(void);
 481
 482         LCONSOLE_INFO("Lustre: Build Version: " LUSTRE_VERSION_STRING "\n");
 483
 484         spin_lock_init(&obd_types_lock);
 485         obd_zombie_impexp_init();
 486
 487         err = obd_init_checks();
 488         if (err == -EOVERFLOW)
 489                 return err;
 490
 491         class_init_uuidlist();
 492         err = class_handle_init();
 493         if (err)
 494                 return err;
 495
 496         INIT_LIST_HEAD(&obd_types);
 497
 498         err = misc_register(&obd_psdev);
 499         if (err) {
 500                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 501                 return err;
 502         }
 503
 504         /* This struct is already zeroed for us (static global) */
 505         for (i = 0; i < class_devno_max(); i++)
 506                 obd_devs[i] = NULL;
 507
 508         /* Default the dirty page cache cap to 1/2 of system memory.
 509          * For clients with less memory, a larger fraction is needed
 510          * for other purposes (mostly for BGL).
 511          */
 512         if (totalram_pages <= 512 << (20 - PAGE_SHIFT))
 513                 obd_max_dirty_pages = totalram_pages / 4;
 514         else
 515                 obd_max_dirty_pages = totalram_pages / 2;
 516
 517         err = obd_init_caches();
 518         if (err)
 519                 return err;
 520
 521         err = class_procfs_init();
 522         if (err)
 523                 return err;
 524
 525         err = obd_sysctl_init();
 526         if (err)
 527                 return err;
 528
 529         err = lu_global_init();
 530         if (err)
 531                 return err;
 532
 533         err = cl_global_init();
 534         if (err != 0)
 535                 return err;
 536
 537         err = llog_info_init();
 538         if (err)
 539                 return err;
 540
 541         err = lustre_register_fs();
 542
 543         return err;
 544 }
 545
 546 static void obdclass_exit(void)
 547 {
 548         int i;
 549
 550         int lustre_unregister_fs(void);
 551
 552         lustre_unregister_fs();
 553
 554         misc_deregister(&obd_psdev);
 555         for (i = 0; i < class_devno_max(); i++) {
 556                 struct obd_device *obd = class_num2obd(i);
 557
 558                 if (obd && obd->obd_set_up &&
 559                     OBT(obd) && OBP(obd, detach)) {
 560                         /* XXX should this call generic detach otherwise? */
 561                         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 562                         OBP(obd, detach)(obd);
 563                 }
 564         }
 565         llog_info_fini();
 566         cl_global_fini();
 567         lu_global_fini();
 568
 569         obd_cleanup_caches();
 570
 571         class_procfs_clean();
 572
 573         class_handle_cleanup();
 574         class_exit_uuidlist();
 575         obd_zombie_impexp_stop();
 576 }
 577
 578 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 579 MODULE_DESCRIPTION("Lustre Class Driver");
 580 MODULE_VERSION(LUSTRE_VERSION_STRING);
 581 MODULE_LICENSE("GPL");
 582
 583 module_init(obdclass_init);
 584 module_exit(obdclass_exit);