lustre/obdclass/class_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  *
   9  * These are the only exported functions, they provide some generic
  10  * infrastructure for managing object devices
  11  *
  12  * Object Devices Class Driver
  13  */
  14
  15 #define EXPORT_SYMTAB
  16 #include <linux/config.h> /* for CONFIG_PROC_FS */
  17 #include <linux/module.h>
  18 #include <linux/errno.h>
  19 #include <linux/kernel.h>
  20 #include <linux/major.h>
  21 #include <linux/sched.h>
  22 #include <linux/lp.h>
  23 #include <linux/slab.h>
  24 #include <linux/ioport.h>
  25 #include <linux/fcntl.h>
  26 #include <linux/delay.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/proc_fs.h>
  29 #include <linux/fs.h>
  30 #include <linux/poll.h>
  31 #include <linux/init.h>
  32 #include <linux/list.h>
  33 #include <asm/io.h>
  34 #include <asm/system.h>
  35 #include <asm/poll.h>
  36 #include <asm/uaccess.h>
  37 #include <linux/miscdevice.h>
  38
  39 #define DEBUG_SUBSYSTEM S_CLASS
  40
  41 #include <linux/obd_support.h>
  42 #include <linux/obd_class.h>
  43 #include <linux/lustre_debug.h>
  44 #include <linux/smp_lock.h>
  45 #include <linux/lprocfs.h>
  46
  47 struct semaphore obd_conf_sem;   /* serialize configuration commands */
  48 struct obd_device obd_dev[MAX_OBD_DEVICES];
  49 struct list_head obd_types;
  50 unsigned long obd_memory;
  51
  52 /* The following are visible and mutable through /proc/sys/lustre/. */
  53 unsigned long obd_fail_loc;
  54 unsigned long obd_timeout = 100;
  55 char obd_recovery_upcall[128] = "/usr/lib/lustre/ha_assist";
  56
  57 extern struct obd_type *class_nm_to_type(char *nm);
  58 /*
  59  * LProcFS specific data structures. These define the namespace for
  60  * the various device classes. We will need to distribute these
  61  * later, to individual modules (e.g. MDS, MDC etc)
  62  */
  63
  64 #ifdef LPROCFS_EXISTS
  65
  66 /*
  67  * Common OBD namespace for lprocFS (these are used very often)
  68  */
  69
  70 char* obd_dir_nm_1[]= {
  71         "mgmt%",
  72         "mgmt/setup",
  73         "mgmt/cleanup",
  74         "mgmt/connect",
  75         "mgmt/disconnect",
  76         0
  77 };
  78
  79 lprocfs_vars_t obd_var_nm_1[]= {
  80         {"num_ops", lprocfs_ll_rd, lprocfs_ll_wr},
  81         {"min_time", lprocfs_ll_rd, lprocfs_ll_wr},
  82         {"max_time", lprocfs_ll_rd, lprocfs_ll_wr},
  83         {"sum_time", lprocfs_ll_rd, lprocfs_ll_wr},
  84         {"0", 0, 0}
  85 };
  86
  87
  88 /*
  89  *  MDC Spcific namespace for lprocFS
  90  */
  91
  92 char *mdc_dir_nm_1[]= {
  93         "reint",
  94         "getstatus",
  95         "getattr",
  96         "setattr",
  97         "open",
  98         "readpage",
  99         "create",
 100         "unlink",
 101         "link",
 102         "rename",
 103         0
 104 };
 105
 106 /*
 107  * Create the MDC groupings
 108  */
 109 lprocfs_group_t lprocfs_mdc_nm[]= {
 110
 111         {obd_dir_nm_1, obd_var_nm_1, e_generic},
 112         {mdc_dir_nm_1, obd_var_nm_1, e_generic},
 113         {0, 0, 0}
 114 };
 115
 116 /*
 117  * MDS Device Groupings
 118  */
 119 char *mds_dir_nm_1[]={
 120         "getstatus",
 121         "connect",
 122         "disconnect_callback",
 123         "getattr",
 124         "readpage",
 125         "open",
 126         "close",
 127         "create",
 128         "unlink",
 129         "link",
 130         "rename",
 131         "reint%",
 132         "reint/summary",
 133         "reint/setattr",
 134         "reint/create",
 135         "reint/unlink",
 136         "reint/link",
 137         "reint/rename",
 138         "reint/recreate",
 139         0
 140 };
 141
 142 char *mds_dir_nm_2[]={
 143         "mstatfs",
 144         0
 145 };
 146
 147
 148 lprocfs_vars_t mds_var_nm_2[]={
 149         {"f_type", rd_other, wr_other},
 150         {"f_bsize",rd_other, wr_other},
 151         {"f_blocks",rd_other, wr_other},
 152         {"f_bfree",rd_other, wr_other},
 153         {"f_bavail",rd_other, wr_other},
 154         {"uuid",rd_string, wr_string},
 155         {"0", 0, 0}
 156 };
 157
 158
 159 lprocfs_group_t lprocfs_mds_nm[]={
 160          {obd_dir_nm_1, obd_var_nm_1, e_generic},
 161          {mds_dir_nm_1, obd_var_nm_1, e_generic},
 162          {mds_dir_nm_2, mds_var_nm_2, e_specific},
 163          {0, 0, 0}
 164 };
 165
 166 /*
 167  * OSC Namespace
 168  */
 169
 170 char* osc_dir_nm_1[]={
 171         "create",
 172         "destroy",
 173         "getattr",
 174         "setattr",
 175         "open",
 176         "close",
 177         "brw",
 178         "punch",
 179         "summary",
 180         "cancel",
 181         0
 182 };
 183
 184 lprocfs_group_t lprocfs_osc_nm[]={
 185          {obd_dir_nm_1, obd_var_nm_1, e_generic},
 186          {osc_dir_nm_1, obd_var_nm_1, e_generic},
 187          {0, 0, 0}
 188 };
 189
 190
 191 /*
 192  * OST, LOV, OBD_FILTER namespace
 193  * Note: These namespaces are exactly similar to the osc_dir_namespace
 194  * Hence, I use the osc namespace as the base class and add only
 195  * those attributes that are missing in osc_dir_namespace.
 196  */
 197
 198 char *ost_lov_obdfilter_dir_nm_1[]={
 199         "getinfo",
 200         0
 201
 202 };
 203
 204 char *ost_lov_obdfilter_dir_nm_2[]={
 205         "ostatfs",
 206         0
 207 };
 208
 209 lprocfs_vars_t ost_lov_obdfilter_var_nm_2[]={
 210         {"f_type", rd_other, wr_other},
 211         {"f_bsize",rd_other, wr_other},
 212         {"f_blocks",rd_other, wr_other},
 213         {"f_bfree",rd_other, wr_other},
 214         {"f_bavail",rd_other, wr_other},
 215         {"f_objects", rd_other, wr_other},
 216         {"f_ofree", rd_other, wr_other},
 217         {"f_objectgroups", rd_other, wr_other},
 218         {"f_uuid", rd_string, wr_string},
 219         {"0", 0, 0}
 220 };
 221
 222
 223 lprocfs_group_t lprocfs_ost_lov_obdf_nm[]={
 224          {obd_dir_nm_1, obd_var_nm_1, e_generic},
 225          {osc_dir_nm_1, obd_var_nm_1, e_generic},
 226          {ost_lov_obdfilter_dir_nm_1, obd_var_nm_1, e_generic},
 227          {ost_lov_obdfilter_dir_nm_2, ost_lov_obdfilter_var_nm_2, e_specific},
 228          {0, 0, 0}
 229 };
 230
 231 /*
 232  * LDLM Device namespace
 233  */
 234
 235
 236 char* ldlm_dir_nm_1[]={
 237         "locks%",
 238         "locks/enqueus",
 239         "locks/cancels",
 240         "locks/converts",
 241         "locks/matches",
 242         0
 243 };
 244
 245 lprocfs_vars_t ldlm_var_nm_1[]= {
 246         {"num_total", lprocfs_ll_rd, lprocfs_ll_wr},
 247         {"num_zerolatency", lprocfs_ll_rd, lprocfs_ll_wr},
 248         {"num_zerolatency_inflight", lprocfs_ll_rd, lprocfs_ll_wr},
 249         {"num_zerolatency_done", lprocfs_ll_rd, lprocfs_ll_wr},
 250         {"nonzero_mintime", lprocfs_ll_rd, lprocfs_ll_wr},
 251         {"nonzero_maxtime", lprocfs_ll_rd, lprocfs_ll_wr},
 252         {"nonzero_sumtime", lprocfs_ll_rd, lprocfs_ll_wr},
 253         {"0", 0, 0}
 254
 255 };
 256
 257 lprocfs_group_t lprocfs_ldlm_nm[]={
 258          {obd_dir_nm_1, obd_var_nm_1, e_generic},
 259          {ldlm_dir_nm_1, ldlm_var_nm_1, e_generic},
 260          {0, 0, 0}
 261 };
 262
 263 /*
 264  * Note: Need to add namespace for breaking out locks by device class
 265  */
 266
 267 /*
 268  * PTLRPC Namespace
 269  */
 270 char* ptlrpc_dir_nm_1[]={
 271         "counters",
 272         0
 273 };
 274
 275 lprocfs_vars_t ptlrpc_var_nm_1[]={
 276         {"msgs_alloc", lprocfs_ll_rd, lprocfs_ll_wr},
 277         {"msgs_max", lprocfs_ll_rd, lprocfs_ll_wr},
 278         {"recv_count", lprocfs_ll_rd, lprocfs_ll_wr},
 279         {"recv_length", lprocfs_ll_rd, lprocfs_ll_wr},
 280         {"send_count", lprocfs_ll_rd, lprocfs_ll_wr},
 281         {"send_length", lprocfs_ll_rd, lprocfs_ll_wr},
 282         {"portal_kmemory", lprocfs_ll_rd, lprocfs_ll_wr},
 283         {"0", 0, 0}
 284 };
 285
 286 char* ptlrpc_dir_nm_2[] = {
 287         "network",
 288         0
 289 };
 290
 291 lprocfs_vars_t ptlrpc_var_nm_2[] = {
 292         {"type", rd_string, wr_string},
 293         {"mtu", lprocfs_ll_rd, lprocfs_ll_wr},
 294         {"rxpackets", lprocfs_ll_rd, lprocfs_ll_wr},
 295         {"txpackets", lprocfs_ll_rd, lprocfs_ll_wr},
 296         {"txbytes", lprocfs_ll_rd, lprocfs_ll_wr},
 297         {"0", 0, 0}
 298 };
 299
 300 lprocfs_group_t lprocfs_ptlrpc_nm[]={
 301          {obd_dir_nm_1, obd_var_nm_1, e_generic},
 302          {ptlrpc_dir_nm_1, ptlrpc_var_nm_1, e_generic},
 303          {ptlrpc_dir_nm_2, ptlrpc_var_nm_2, e_specific},
 304          {0, 0, 0}
 305 };
 306
 307
 308 /*
 309  * Building the entire device namespace. This will be used during attach and
 310  * detach to associate the namespace with the class of the device
 311  */
 312
 313 lprocfs_obd_nm_t obd_nm[]={
 314         {"mdc", lprocfs_mdc_nm, sizeof(struct lprofiler_gen)},
 315         {"mds", lprocfs_mds_nm, sizeof(struct lprofiler_gen)},
 316         {"osc", lprocfs_osc_nm, sizeof(struct lprofiler_gen)},
 317         {"ost", lprocfs_ost_lov_obdf_nm, sizeof(struct lprofiler_gen)},
 318         {"lov", lprocfs_ost_lov_obdf_nm, sizeof(struct lprofiler_gen)},
 319         {"obdfilter", lprocfs_ost_lov_obdf_nm, sizeof(struct lprofiler_gen)},
 320         {"obdecho", lprocfs_ost_lov_obdf_nm, sizeof(struct lprofiler_gen)},
 321         {"ldlm", lprocfs_ldlm_nm, sizeof(struct lprofiler_ldlm)},
 322         {"ptlrpc", lprocfs_ptlrpc_nm, sizeof(struct lprofiler_ptlrpc)},
 323         {"0", 0, 0}
 324 };
 325
 326 #else
 327
 328 lprocfs_obd_nm_t* obd_nm=0;
 329
 330 #endif
 331
 332 /*  opening /dev/obd */
 333 static int obd_class_open(struct inode * inode, struct file * file)
 334 {
 335         ENTRY;
 336
 337         file->private_data = NULL;
 338         MOD_INC_USE_COUNT;
 339         RETURN(0);
 340 }
 341
 342 /*  closing /dev/obd */
 343 static int obd_class_release(struct inode * inode, struct file * file)
 344 {
 345         ENTRY;
 346
 347         if (file->private_data)
 348                 file->private_data = NULL;
 349
 350         MOD_DEC_USE_COUNT;
 351         RETURN(0);
 352 }
 353
 354
 355 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
 356 {
 357         conn->addr = data->ioc_addr;
 358         conn->cookie = data->ioc_cookie;
 359 }
 360
 361
 362 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
 363 {
 364         data->ioc_addr = conn->addr;
 365         data->ioc_cookie = conn->cookie;
 366 }
 367
 368
 369 /* to control /dev/obd */
 370 static int obd_class_ioctl (struct inode * inode, struct file * filp,
 371                             unsigned int cmd, unsigned long arg)
 372 {
 373         char *buf = NULL;
 374         int len = 0;
 375         struct obd_ioctl_data *data;
 376         struct obd_device *obd = filp->private_data;
 377
 378         struct lustre_handle conn;
 379         int rw = OBD_BRW_READ;
 380         int err = 0;
 381         int serialised = 0;
 382         int l_idx = 0;
 383         ENTRY;
 384
 385         switch (cmd)
 386         {
 387         case OBD_IOC_BRW_WRITE:
 388         case OBD_IOC_BRW_READ:
 389         case OBD_IOC_GETATTR:
 390                 break;
 391         default:
 392                 down(&obd_conf_sem);
 393                 serialised = 1;
 394                 break;
 395         }
 396
 397         if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
 398             cmd != OBD_IOC_LIST &&
 399             cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
 400                 CERROR("OBD ioctl: No device\n");
 401                 GOTO(out, err=-EINVAL);
 402         }
 403         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 404                 CERROR("OBD ioctl: data error\n");
 405                 GOTO(out, err=-EINVAL);
 406         }
 407         data = (struct obd_ioctl_data *)buf;
 408
 409         switch (cmd) {
 410         case TCGETS:
 411                 GOTO(out, err=-EINVAL);
 412         case OBD_IOC_DEVICE: {
 413                 CDEBUG(D_IOCTL, "\n");
 414                 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
 415                         CERROR("OBD ioctl: DEVICE insufficient devices\n");
 416                         GOTO(out, err=-EINVAL);
 417                 }
 418                 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
 419
 420                 filp->private_data = &obd_dev[data->ioc_dev];
 421                 GOTO(out, err=0);
 422         }
 423
 424         case OBD_IOC_LIST: {
 425                 int i;
 426                 char *buf2 = data->ioc_bulk;
 427                 int remains = data->ioc_inllen1;
 428
 429                 if (!data->ioc_inlbuf1) {
 430                         CERROR("No buffer passed!\n");
 431                         GOTO(out, err=-EINVAL);
 432                 }
 433
 434
 435                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 436                         int l;
 437                         char *status;
 438                         struct obd_device *obd = &obd_dev[i];
 439                         if (!obd->obd_type)
 440                                 continue;
 441                         if (obd->obd_flags & OBD_SET_UP)
 442                                 status = "UP";
 443                         else if (obd->obd_flags & OBD_ATTACHED)
 444                                 status = "AT";
 445                         else
 446                                 status = "-";
 447                         l = snprintf(buf2, remains, "%2d %s %s %s %s %d\n",
 448                                      i, status, obd->obd_type->typ_name,
 449                                      obd->obd_name, obd->obd_uuid, obd->obd_type->typ_refcnt);
 450                         buf2 +=l;
 451                         remains -=l;
 452                         if (remains <= 0) {
 453                                 CERROR("not enough space for device listing\n");
 454                                 break;
 455                         }
 456                 }
 457
 458                 err = copy_to_user((int *)arg, data, len);
 459                 GOTO(out, err);
 460         }
 461
 462
 463         case OBD_IOC_NAME2DEV: {
 464                 /* Resolve a device name.  This does not change the
 465                  * currently selected device.
 466                  */
 467                 int dev;
 468
 469                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
 470                         CERROR("No name passed,!\n");
 471                         GOTO(out, err=-EINVAL);
 472                 }
 473                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 474                         CERROR("Name not nul terminated!\n");
 475                         GOTO(out, err=-EINVAL);
 476                 }
 477
 478                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 479                 dev = class_name2dev(data->ioc_inlbuf1);
 480                 data->ioc_dev = dev;
 481                 if (dev == -1) {
 482                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 483                                data->ioc_inlbuf1);
 484                         GOTO(out, err=-EINVAL);
 485                 }
 486
 487                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 488                        dev);
 489                 err = copy_to_user((int *)arg, data, sizeof(*data));
 490                 GOTO(out, err);
 491         }
 492
 493         case OBD_IOC_UUID2DEV: {
 494                 /* Resolve a device uuid.  This does not change the
 495                  * currently selected device.
 496                  */
 497                 int dev;
 498
 499                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 500                         CERROR("No UUID passed!\n");
 501                         GOTO(out, err=-EINVAL);
 502                 }
 503                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 504                         CERROR("Name not nul terminated!\n");
 505                         GOTO(out, err=-EINVAL);
 506                 }
 507
 508                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 509                 dev = class_uuid2dev(data->ioc_inlbuf1);
 510                 data->ioc_dev = dev;
 511                 if (dev == -1) {
 512                         CDEBUG(D_IOCTL, "No device for name %s!\n",
 513                                data->ioc_inlbuf1);
 514                         GOTO(out, err=-EINVAL);
 515                 }
 516
 517                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 518                        dev);
 519                 err = copy_to_user((int *)arg, data, sizeof(*data));
 520                 GOTO(out, err);
 521         }
 522
 523         case OBD_IOC_NEWDEV: {
 524                 int dev = -1;
 525                 int i;
 526
 527                 filp->private_data = NULL;
 528                 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
 529                         struct obd_device *obd = &obd_dev[i];
 530                         if (!obd->obd_type) {
 531                                 filp->private_data = obd;
 532                                 dev = i;
 533                                 break;
 534                         }
 535                 }
 536
 537
 538                 data->ioc_dev = dev;
 539                 if (dev == -1)
 540                         GOTO(out, err=-EINVAL);
 541
 542                 err = copy_to_user((int *)arg, data, sizeof(*data));
 543                 GOTO(out, err);
 544         }
 545
 546         case OBD_IOC_ATTACH: {
 547                 struct obd_type *type;
 548                 int minor;
 549
 550                 /* have we attached a type to this device */
 551                 if (obd->obd_flags & OBD_ATTACHED || obd->obd_type) {
 552                         CERROR("OBD: Device %d already typed as %s.\n",
 553                                obd->obd_minor, MKSTR(obd->obd_type->typ_name));
 554                         GOTO(out, err=-EBUSY);
 555                 }
 556
 557                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 558                         CERROR("No type passed!\n");
 559                         GOTO(out, err=-EINVAL);
 560                 }
 561                 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
 562                         CERROR("Type not nul terminated!\n");
 563                         GOTO(out, err=-EINVAL);
 564                 }
 565
 566                 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 567                        MKSTR(data->ioc_inlbuf1),
 568                        MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
 569
 570                 /* find the type */
 571                 type = class_nm_to_type(data->ioc_inlbuf1);
 572                 if (!type) {
 573                         CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
 574                         GOTO(out, err=-EINVAL);
 575                 }
 576
 577                 minor = obd->obd_minor;
 578                 memset(obd, 0, sizeof(*obd));
 579                 obd->obd_minor = minor;
 580                 obd->obd_type = type;
 581                 INIT_LIST_HEAD(&obd->obd_exports);
 582                 INIT_LIST_HEAD(&obd->obd_imports);
 583                 spin_lock_init(&obd->obd_dev_lock);
 584
 585                 /* do the attach */
 586                 if (OBP(obd, attach))
 587                         err = OBP(obd,attach)(obd, sizeof(*data), data);
 588                 if (err) {
 589                         obd->obd_type = NULL;
 590                 } else {
 591                         obd->obd_flags |= OBD_ATTACHED;
 592
 593                         type->typ_refcnt++;
 594                         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
 595                                obd->obd_minor, data->ioc_inlbuf1);
 596                         if (data->ioc_inlbuf2) {
 597                                 int len = strlen(data->ioc_inlbuf2) + 1;
 598                                 OBD_ALLOC(obd->obd_name, len);
 599                                 if (!obd->obd_name) {
 600                                         CERROR("no memory\n");
 601                                         LBUG();
 602                                 }
 603                                 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
 604                                 /* obd->obd_proc_entry =
 605                                         proc_lustre_register_obd_device(obd);
 606                                 */
 607                         } else {
 608                                 CERROR("WARNING: unnamed obd device\n");
 609                                 obd->obd_proc_entry = NULL;
 610                         }
 611
 612                         if (data->ioc_inlbuf3) {
 613                                 int len = strlen(data->ioc_inlbuf3);
 614                                 if (len >= sizeof(obd->obd_uuid)) {
 615                                         CERROR("uuid must be < %d bytes long\n",
 616                                                sizeof(obd->obd_uuid));
 617                                         if (obd->obd_name)
 618                                                 OBD_FREE(obd->obd_name,
 619                                                          strlen(obd->obd_name) + 1);
 620                                         GOTO(out, err=-EINVAL);
 621                                 }
 622                                 memcpy(obd->obd_uuid, data->ioc_inlbuf3, len);
 623                         }
 624                         /* Get the LprocFS namespace for this device class */
 625                         /*
 626                         l_idx = lprocfs_get_nm(data->ioc_inlbuf1, obd_nm);
 627                         if (l_idx < 0) {
 628                                 CERROR("Non-existent device class"
 629                                        "or proc/lustre not compiled \n");
 630                         } else {
 631                                 lprocfs_reg_dev(obd, obd_nm[l_idx].obd_names,
 632                                                 obd_nm[l_idx].cntr_blk_sz);
 633                         }
 634                         */
 635                         MOD_INC_USE_COUNT;
 636                 }
 637
 638                 GOTO(out, err);
 639         }
 640
 641         case OBD_IOC_DETACH: {
 642                 ENTRY;
 643                 if (obd->obd_flags & OBD_SET_UP) {
 644                         CERROR("OBD device %d still set up\n", obd->obd_minor);
 645                         GOTO(out, err=-EBUSY);
 646                 }
 647                 if (!(obd->obd_flags & OBD_ATTACHED) ) {
 648                         CERROR("OBD device %d not attached\n", obd->obd_minor);
 649                         GOTO(out, err=-ENODEV);
 650                 }
 651 #warning FIXME: Mike, we probably need some sort of "force detach" here
 652                 if (!list_empty(&obd->obd_exports) ) {
 653                         CERROR("OBD device %d (%p) has exports\n",
 654                                obd->obd_minor, obd);
 655                         GOTO(out, err=-EBUSY);
 656                 }
 657
 658                 /*
 659                 if (lprocfs_dereg_dev(obd) != LPROCFS_SUCCESS) {
 660                         CERROR("Could not remove /proc entry\n");
 661                 }
 662                 */
 663                 if (obd->obd_name) {
 664                         OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
 665                         obd->obd_name = NULL;
 666                 }
 667                 /*
 668                 if (obd->obd_proc_entry)
 669                         proc_lustre_release_obd_device(obd);
 670                 */
 671
 672                 obd->obd_flags &= ~OBD_ATTACHED;
 673                 obd->obd_type->typ_refcnt--;
 674                 obd->obd_type = NULL;
 675                 MOD_DEC_USE_COUNT;
 676                 GOTO(out, err=0);
 677         }
 678
 679         case OBD_IOC_SETUP: {
 680                 /* have we attached a type to this device? */
 681                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 682                         CERROR("Device %d not attached\n", obd->obd_minor);
 683                         GOTO(out, err=-ENODEV);
 684                 }
 685
 686                 /* has this been done already? */
 687                 if ( obd->obd_flags & OBD_SET_UP ) {
 688                         CERROR("Device %d already setup (type %s)\n",
 689                                obd->obd_minor, obd->obd_type->typ_name);
 690                         GOTO(out, err=-EBUSY);
 691                 }
 692
 693                 if ( OBT(obd) && OBP(obd, setup) )
 694                         err = obd_setup(obd, sizeof(*data), data);
 695
 696                 if (!err) {
 697                         obd->obd_type->typ_refcnt++;
 698                         obd->obd_flags |= OBD_SET_UP;
 699                 }
 700
 701                 GOTO(out, err);
 702         }
 703         case OBD_IOC_CLEANUP: {
 704                 /* have we attached a type to this device? */
 705                 if (!(obd->obd_flags & OBD_ATTACHED)) {
 706                         CERROR("Device %d not attached\n", obd->obd_minor);
 707                         GOTO(out, err=-ENODEV);
 708                 }
 709
 710                 if ( OBT(obd) && OBP(obd, cleanup) )
 711                         err = obd_cleanup(obd);
 712
 713                 if (!err) {
 714                         obd->obd_flags &= ~OBD_SET_UP;
 715                         obd->obd_type->typ_refcnt--;
 716                 }
 717                 GOTO(out, err);
 718         }
 719
 720         case OBD_IOC_CONNECT: {
 721                 char * cluuid = "OBD_CLASS_UUID";
 722                 obd_data2conn(&conn, data);
 723
 724                 err = obd_connect(&conn, obd, cluuid);
 725
 726                 CDEBUG(D_IOCTL, "assigned export "LPX64"\n", conn.addr);
 727                 obd_conn2data(data, &conn);
 728                 if (err)
 729                         GOTO(out, err);
 730
 731                 err = copy_to_user((int *)arg, data, sizeof(*data));
 732                 GOTO(out, err);
 733         }
 734
 735         case OBD_IOC_DISCONNECT: {
 736                 obd_data2conn(&conn, data);
 737                 err = obd_disconnect(&conn);
 738                 GOTO(out, err);
 739         }
 740
 741         case OBD_IOC_DEC_USE_COUNT: {
 742                 MOD_DEC_USE_COUNT;
 743                 GOTO(out, err=0);
 744         }
 745
 746         case OBD_IOC_CREATE: {
 747                 struct lov_stripe_md *ea = NULL;
 748                 obd_data2conn(&conn, data);
 749
 750                 err = obd_create(&conn, &data->ioc_obdo1, &ea);
 751                 if (err)
 752                         GOTO(out, err);
 753
 754                 err = copy_to_user((int *)arg, data, sizeof(*data));
 755                 GOTO(out, err);
 756         }
 757
 758         case OBD_IOC_GETATTR: {
 759
 760                 obd_data2conn(&conn, data);
 761                 err = obd_getattr(&conn, &data->ioc_obdo1, NULL);
 762                 if (err)
 763                         GOTO(out, err);
 764
 765                 err = copy_to_user((int *)arg, data, sizeof(*data));
 766                 GOTO(out, err);
 767         }
 768
 769         case OBD_IOC_SETATTR: {
 770                 obd_data2conn(&conn, data);
 771                 err = obd_setattr(&conn, &data->ioc_obdo1, NULL);
 772                 if (err)
 773                         GOTO(out, err);
 774
 775                 err = copy_to_user((int *)arg, data, sizeof(*data));
 776                 GOTO(out, err);
 777         }
 778
 779         case OBD_IOC_DESTROY: {
 780                 //void *ea;
 781                 obd_data2conn(&conn, data);
 782
 783                 err = obd_destroy(&conn, &data->ioc_obdo1, NULL);
 784                 if (err)
 785                         GOTO(out, err);
 786
 787                 err = copy_to_user((int *)arg, data, sizeof(*data));
 788                 GOTO(out, err);
 789         }
 790
 791         case OBD_IOC_OPEN: {
 792                 struct lov_stripe_md *md; // XXX fill in md from create
 793
 794                 obd_data2conn(&conn, data);
 795                 err = obd_open(&conn, &data->ioc_obdo1, NULL);
 796                 GOTO(out, err);
 797         }
 798
 799         case OBD_IOC_CLOSE: {
 800                 struct lov_stripe_md *md; // XXX fill in md from create
 801
 802                 obd_data2conn(&conn, data);
 803                 obd_data2conn(&conn, data);
 804                 err = obd_close(&conn, &data->ioc_obdo1, NULL);
 805                 GOTO(out, err);
 806         }
 807
 808         case OBD_IOC_BRW_WRITE:
 809                 rw = OBD_BRW_WRITE;
 810         case OBD_IOC_BRW_READ: {
 811                 struct lov_stripe_md smd;
 812                 struct io_cb_data *cbd = ll_init_cb();
 813                 obd_count       pages = 0;
 814                 struct brw_page *pga, *pgp;
 815                 __u64 id = data->ioc_obdo1.o_id;
 816                 int gfp_mask = (id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
 817                 int verify = (id != 0);
 818                 __u64 off;
 819                 int j;
 820
 821                 if (!cbd)
 822                         GOTO(out, err = -ENOMEM);
 823
 824                 obd_data2conn(&conn, data);
 825
 826                 pages = data->ioc_count / PAGE_SIZE;
 827                 off = data->ioc_offset;
 828
 829                 CDEBUG(D_INODE, "BRW %s with %d pages @ 0x"LPX64"\n",
 830                        rw == OBD_BRW_READ ? "read" : "write", pages, off);
 831                 OBD_ALLOC(pga, pages * sizeof(*pga));
 832                 if (!pga) {
 833                         CERROR("no memory for %d BRW per-page data\n", pages);
 834                         GOTO(brw_free, err = -ENOMEM);
 835                 }
 836
 837                 memset(&smd, 0, sizeof(smd));
 838                 smd.lmd_object_id = id;
 839
 840                 for (j = 0, pgp = pga; j < pages; j++, off += PAGE_SIZE, pgp++){
 841                         pgp->pg = alloc_pages(gfp_mask, 0);
 842                         if (!pgp->pg) {
 843                                 CERROR("no memory for brw pages\n");
 844                                 GOTO(brw_cleanup, err = -ENOMEM);
 845                         }
 846                         pgp->count = PAGE_SIZE;
 847                         pgp->off = off;
 848                         pgp->flag = 0;
 849
 850                         if (verify) {
 851                                 void *addr = kmap(pgp->pg);
 852
 853                                 if (rw == OBD_BRW_WRITE)
 854                                         page_debug_setup(addr, pgp->count,
 855                                                          pgp->off, id);
 856                                 else
 857                                         page_debug_setup(addr, pgp->count,
 858                                                          0xdeadbeef00c0ffee,
 859                                                          0xdeadbeef00c0ffee);
 860                                 kunmap(pgp->pg);
 861                         }
 862                 }
 863
 864                 err = obd_brw(rw, &conn, &smd, j, pga, ll_sync_io_cb, cbd);
 865                 if (err)
 866                         CERROR("test_brw: error from obd_brw: err = %d\n", err);
 867                 EXIT;
 868         brw_cleanup:
 869                 for (j = 0, pgp = pga; j < pages; j++, pgp++) {
 870                         if (pgp->pg != NULL) {
 871                                 if (verify && !err) {
 872                                         void *addr = kmap(pgp->pg);
 873
 874                                         err = page_debug_check("test_brw",
 875                                                                addr,
 876                                                                PAGE_SIZE,
 877                                                                pgp->off,id);
 878                                         kunmap(pgp->pg);
 879                                 }
 880                                 __free_pages(pgp->pg, 0);
 881                         }
 882                 }
 883         brw_free:
 884                 OBD_FREE(pga, pages * sizeof(*pga));
 885                 GOTO(out, err);
 886         }
 887         default:
 888                 obd_data2conn(&conn, data);
 889
 890                 err = obd_iocontrol(cmd, &conn, len, data, NULL);
 891                 if (err)
 892                         GOTO(out, err);
 893
 894                 err = copy_to_user((int *)arg, data, len);
 895                 GOTO(out, err);
 896         }
 897
 898  out:
 899         if (buf)
 900                 OBD_FREE(buf, len);
 901         if (serialised)
 902                 up(&obd_conf_sem);
 903         RETURN(err);
 904 } /* obd_class_ioctl */
 905
 906
 907
 908 /* declare character device */
 909 static struct file_operations obd_psdev_fops = {
 910         ioctl: obd_class_ioctl,       /* ioctl */
 911         open: obd_class_open,        /* open */
 912         release: obd_class_release,     /* release */
 913 };
 914
 915 /* modules setup */
 916 #define OBD_MINOR 241
 917 static struct miscdevice obd_psdev = {
 918         OBD_MINOR,
 919         "obd_psdev",
 920         &obd_psdev_fops
 921 };
 922
 923 void (*class_signal_connection_failure)(struct ptlrpc_connection *);
 924 int (*mds_destroy_export)(struct obd_export *exp);
 925 int (*ldlm_destroy_export)(struct obd_export *exp);
 926
 927 EXPORT_SYMBOL(obd_dev);
 928 EXPORT_SYMBOL(obdo_cachep);
 929 EXPORT_SYMBOL(obd_memory);
 930 EXPORT_SYMBOL(obd_fail_loc);
 931 EXPORT_SYMBOL(obd_timeout);
 932 EXPORT_SYMBOL(obd_recovery_upcall);
 933
 934 EXPORT_SYMBOL(class_register_type);
 935 EXPORT_SYMBOL(class_unregister_type);
 936 EXPORT_SYMBOL(class_name2dev);
 937 EXPORT_SYMBOL(class_uuid2dev);
 938 EXPORT_SYMBOL(class_uuid2obd);
 939 EXPORT_SYMBOL(class_new_export);
 940 EXPORT_SYMBOL(class_destroy_export);
 941 EXPORT_SYMBOL(class_connect);
 942 EXPORT_SYMBOL(class_conn2export);
 943 EXPORT_SYMBOL(class_conn2obd);
 944 EXPORT_SYMBOL(class_conn2cliimp);
 945 EXPORT_SYMBOL(class_conn2ldlmimp);
 946 EXPORT_SYMBOL(class_disconnect);
 947 EXPORT_SYMBOL(class_disconnect_all);
 948 //EXPORT_SYMBOL(class_uuid_parse);
 949 EXPORT_SYMBOL(class_uuid_unparse);
 950 //EXPORT_SYMBOL(class_multi_setup);
 951 //EXPORT_SYMBOL(class_multi_cleanup);
 952
 953 EXPORT_SYMBOL(class_signal_connection_failure);
 954 EXPORT_SYMBOL(mds_destroy_export);
 955 EXPORT_SYMBOL(ldlm_destroy_export);
 956 EXPORT_SYMBOL(ll_sync_io_cb);
 957 EXPORT_SYMBOL(ll_init_cb);
 958
 959 static int __init init_obdclass(void)
 960 {
 961         struct obd_device *obd;
 962         int err;
 963         int i;
 964
 965         printk(KERN_INFO "OBD class driver  v0.9, info@clusterfs.com\n");
 966
 967         sema_init(&obd_conf_sem, 1);
 968         INIT_LIST_HEAD(&obd_types);
 969
 970         if ((err = misc_register(&obd_psdev))) {
 971                 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
 972                 return err;
 973         }
 974
 975         /* This struct is already zerod for us (static global) */
 976         for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
 977                 obd->obd_minor = i;
 978
 979         err = obd_init_caches();
 980         if (err)
 981                 return err;
 982         obd_sysctl_init();
 983         return 0;
 984 }
 985
 986 static void __exit cleanup_obdclass(void)
 987 {
 988         int i;
 989         ENTRY;
 990
 991         misc_deregister(&obd_psdev);
 992         for (i = 0; i < MAX_OBD_DEVICES; i++) {
 993                 struct obd_device *obd = &obd_dev[i];
 994                 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
 995                     OBT(obd) && OBP(obd, detach)) {
 996                         /* XXX should this call generic detach otherwise? */
 997                         OBP(obd, detach)(obd);
 998                 }
 999         }
1000
1001         obd_cleanup_caches();
1002         obd_sysctl_clean();
1003         CERROR("obd memory leaked: %ld bytes\n", obd_memory);
1004         EXIT;
1005 }
1006
1007 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1008 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
1009 MODULE_LICENSE("GPL");
1010
1011 module_init(init_obdclass);
1012 module_exit(cleanup_obdclass);