lustre/obdclass/lprocfs_status.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/lprocfs_status.c
  37  *
  38  * Author: Hariharan Thantry <thantry@users.sourceforge.net>
  39  */
  40
  41 #ifndef EXPORT_SYMTAB
  42 # define EXPORT_SYMTAB
  43 #endif
  44 #define DEBUG_SUBSYSTEM S_CLASS
  45
  46 #ifndef __KERNEL__
  47 # include <liblustre.h>
  48 #endif
  49
  50 #include <obd_class.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_fsfilt.h>
  53 #include <lustre_log.h>
  54 #include <lustre/lustre_idl.h>
  55
  56 #if defined(LPROCFS)
  57
  58 #define MAX_STRING_SIZE 128
  59
  60 /* for bug 10866, global variable */
  61 CFS_DECLARE_RWSEM(_lprocfs_lock);
  62 EXPORT_SYMBOL(_lprocfs_lock);
  63
  64 int lprocfs_seq_release(struct inode *inode, struct file *file)
  65 {
  66         LPROCFS_EXIT();
  67         return seq_release(inode, file);
  68 }
  69 EXPORT_SYMBOL(lprocfs_seq_release);
  70
  71 struct proc_dir_entry *lprocfs_srch(struct proc_dir_entry *head,
  72                                     const char *name)
  73 {
  74         struct proc_dir_entry *temp;
  75
  76         if (head == NULL)
  77                 return NULL;
  78         LPROCFS_ENTRY();
  79
  80         temp = head->subdir;
  81         while (temp != NULL) {
  82                 if (strcmp(temp->name, name) == 0) {
  83                         LPROCFS_EXIT();
  84                         return temp;
  85                 }
  86
  87                 temp = temp->next;
  88         }
  89         LPROCFS_EXIT();
  90         return NULL;
  91 }
  92
  93 /* lprocfs API calls */
  94
  95 /* Function that emulates snprintf but also has the side effect of advancing
  96    the page pointer for the next write into the buffer, incrementing the total
  97    length written to the buffer, and decrementing the size left in the
  98    buffer. */
  99 static int lprocfs_obd_snprintf(char **page, int end, int *len,
 100                                 const char *format, ...)
 101 {
 102         va_list list;
 103         int n;
 104
 105         if (*len >= end)
 106                 return 0;
 107
 108         va_start(list, format);
 109         n = vsnprintf(*page, end - *len, format, list);
 110         va_end(list);
 111
 112         *page += n; *len += n;
 113         return n;
 114 }
 115
 116 cfs_proc_dir_entry_t *lprocfs_add_simple(struct proc_dir_entry *root,
 117                                          char *name,
 118                                          read_proc_t *read_proc,
 119                                          write_proc_t *write_proc,
 120                                          void *data,
 121                                          struct file_operations *fops)
 122 {
 123         cfs_proc_dir_entry_t *proc;
 124         mode_t mode = 0;
 125
 126         if (root == NULL || name == NULL)
 127                 return ERR_PTR(-EINVAL);
 128         if (read_proc)
 129                 mode = 0444;
 130         if (write_proc)
 131                 mode |= 0200;
 132         if (fops)
 133                 mode = 0644;
 134         proc = create_proc_entry(name, mode, root);
 135         if (!proc) {
 136                 CERROR("LprocFS: No memory to create /proc entry %s", name);
 137                 return ERR_PTR(-ENOMEM);
 138         }
 139         proc->read_proc = read_proc;
 140         proc->write_proc = write_proc;
 141         proc->data = data;
 142         if (fops)
 143                 proc->proc_fops = fops;
 144         return proc;
 145 }
 146
 147 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
 148                         struct proc_dir_entry *parent, const char *format, ...)
 149 {
 150         struct proc_dir_entry *entry;
 151         char *dest;
 152         va_list ap;
 153
 154         if (parent == NULL || format == NULL)
 155                 return NULL;
 156
 157         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
 158         if (dest == NULL)
 159                 return NULL;
 160
 161         va_start(ap, format);
 162         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
 163         va_end(ap);
 164
 165         entry = proc_symlink(name, parent, dest);
 166         if (entry == NULL)
 167                 CERROR("LprocFS: Could not create symbolic link from %s to %s",
 168                         name, dest);
 169
 170         OBD_FREE(dest, MAX_STRING_SIZE + 1);
 171         return entry;
 172 }
 173
 174 static ssize_t lprocfs_fops_read(struct file *f, char __user *buf,
 175                                  size_t size, loff_t *ppos)
 176 {
 177         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 178         char *page, *start = NULL;
 179         int rc = 0, eof = 1, count;
 180
 181         if (*ppos >= CFS_PAGE_SIZE)
 182                 return 0;
 183
 184         page = (char *)__get_free_page(GFP_KERNEL);
 185         if (page == NULL)
 186                 return -ENOMEM;
 187
 188         if (LPROCFS_ENTRY_AND_CHECK(dp))
 189                 return -ENOENT;
 190
 191         OBD_FAIL_TIMEOUT(OBD_FAIL_LPROC_REMOVE, 10);
 192         if (dp->read_proc)
 193                 rc = dp->read_proc(page, &start, *ppos, CFS_PAGE_SIZE,
 194                                    &eof, dp->data);
 195         LPROCFS_EXIT();
 196         if (rc <= 0)
 197                 goto out;
 198
 199         /* for lustre proc read, the read count must be less than PAGE_SIZE */
 200         LASSERT(eof == 1);
 201
 202         if (start == NULL) {
 203                 rc -= *ppos;
 204                 if (rc < 0)
 205                         rc = 0;
 206                 if (rc == 0)
 207                         goto out;
 208                 start = page + *ppos;
 209         } else if (start < page) {
 210                 start = page;
 211         }
 212
 213         count = (rc < size) ? rc : size;
 214         if (cfs_copy_to_user(buf, start, count)) {
 215                 rc = -EFAULT;
 216                 goto out;
 217         }
 218         *ppos += count;
 219
 220 out:
 221         free_page((unsigned long)page);
 222         return rc;
 223 }
 224
 225 static ssize_t lprocfs_fops_write(struct file *f, const char __user *buf,
 226                                   size_t size, loff_t *ppos)
 227 {
 228         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 229         int rc = -EIO;
 230
 231         if (LPROCFS_ENTRY_AND_CHECK(dp))
 232                 return -ENOENT;
 233         if (dp->write_proc)
 234                 rc = dp->write_proc(f, buf, size, dp->data);
 235         LPROCFS_EXIT();
 236         return rc;
 237 }
 238
 239 static struct file_operations lprocfs_generic_fops = {
 240         .owner = THIS_MODULE,
 241         .read = lprocfs_fops_read,
 242         .write = lprocfs_fops_write,
 243 };
 244
 245 int lprocfs_evict_client_open(struct inode *inode, struct file *f)
 246 {
 247         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 248         struct obd_device *obd = dp->data;
 249
 250         cfs_atomic_inc(&obd->obd_evict_inprogress);
 251
 252         return 0;
 253 }
 254
 255 int lprocfs_evict_client_release(struct inode *inode, struct file *f)
 256 {
 257         struct proc_dir_entry *dp = PDE(f->f_dentry->d_inode);
 258         struct obd_device *obd = dp->data;
 259
 260         cfs_atomic_dec(&obd->obd_evict_inprogress);
 261         cfs_waitq_signal(&obd->obd_evict_inprogress_waitq);
 262
 263         return 0;
 264 }
 265
 266 struct file_operations lprocfs_evict_client_fops = {
 267         .owner = THIS_MODULE,
 268         .read = lprocfs_fops_read,
 269         .write = lprocfs_fops_write,
 270         .open = lprocfs_evict_client_open,
 271         .release = lprocfs_evict_client_release,
 272 };
 273 EXPORT_SYMBOL(lprocfs_evict_client_fops);
 274
 275 /**
 276  * Add /proc entries.
 277  *
 278  * \param root [in]  The parent proc entry on which new entry will be added.
 279  * \param list [in]  Array of proc entries to be added.
 280  * \param data [in]  The argument to be passed when entries read/write routines
 281  *                   are called through /proc file.
 282  *
 283  * \retval 0   on success
 284  *         < 0 on error
 285  */
 286 int lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
 287                      void *data)
 288 {
 289         if (root == NULL || list == NULL)
 290                 return -EINVAL;
 291
 292         while (list->name != NULL) {
 293                 struct proc_dir_entry *cur_root, *proc;
 294                 char *pathcopy, *cur, *next, pathbuf[64];
 295                 int pathsize = strlen(list->name) + 1;
 296
 297                 proc = NULL;
 298                 cur_root = root;
 299
 300                 /* need copy of path for strsep */
 301                 if (strlen(list->name) > sizeof(pathbuf) - 1) {
 302                         OBD_ALLOC(pathcopy, pathsize);
 303                         if (pathcopy == NULL)
 304                                 return -ENOMEM;
 305                 } else {
 306                         pathcopy = pathbuf;
 307                 }
 308
 309                 next = pathcopy;
 310                 strcpy(pathcopy, list->name);
 311
 312                 while (cur_root != NULL && (cur = strsep(&next, "/"))) {
 313                         if (*cur =='\0') /* skip double/trailing "/" */
 314                                 continue;
 315
 316                         proc = lprocfs_srch(cur_root, cur);
 317                         CDEBUG(D_OTHER, "cur_root=%s, cur=%s, next=%s, (%s)\n",
 318                                cur_root->name, cur, next,
 319                                (proc ? "exists" : "new"));
 320                         if (next != NULL) {
 321                                 cur_root = (proc ? proc :
 322                                             proc_mkdir(cur, cur_root));
 323                         } else if (proc == NULL) {
 324                                 mode_t mode = 0;
 325                                 if (list->proc_mode != 0000) {
 326                                         mode = list->proc_mode;
 327                                 } else {
 328                                         if (list->read_fptr)
 329                                                 mode = 0444;
 330                                         if (list->write_fptr)
 331                                                 mode |= 0200;
 332                                 }
 333                                 proc = create_proc_entry(cur, mode, cur_root);
 334                         }
 335                 }
 336
 337                 if (pathcopy != pathbuf)
 338                         OBD_FREE(pathcopy, pathsize);
 339
 340                 if (cur_root == NULL || proc == NULL) {
 341                         CERROR("LprocFS: No memory to create /proc entry %s",
 342                                list->name);
 343                         return -ENOMEM;
 344                 }
 345
 346                 if (list->fops)
 347                         proc->proc_fops = list->fops;
 348                 else
 349                         proc->proc_fops = &lprocfs_generic_fops;
 350                 proc->read_proc = list->read_fptr;
 351                 proc->write_proc = list->write_fptr;
 352                 proc->data = (list->data ? list->data : data);
 353                 list++;
 354         }
 355         return 0;
 356 }
 357
 358 void lprocfs_remove(struct proc_dir_entry **rooth)
 359 {
 360         struct proc_dir_entry *root = *rooth;
 361         struct proc_dir_entry *temp = root;
 362         struct proc_dir_entry *rm_entry;
 363         struct proc_dir_entry *parent;
 364
 365         if (!root)
 366                 return;
 367         *rooth = NULL;
 368
 369         parent = root->parent;
 370         LASSERT(parent != NULL);
 371         LPROCFS_WRITE_ENTRY(); /* search vs remove race */
 372
 373         while (1) {
 374                 while (temp->subdir != NULL)
 375                         temp = temp->subdir;
 376
 377                 rm_entry = temp;
 378                 temp = temp->parent;
 379
 380                 /* Memory corruption once caused this to fail, and
 381                    without this LASSERT we would loop here forever. */
 382                 LASSERTF(strlen(rm_entry->name) == rm_entry->namelen,
 383                          "0x%p  %s/%s len %d\n", rm_entry, temp->name,
 384                          rm_entry->name, (int)strlen(rm_entry->name));
 385
 386                 /* Now, the rm_entry->deleted flags is protected
 387                  * by _lprocfs_lock. */
 388                 rm_entry->data = NULL;
 389                 remove_proc_entry(rm_entry->name, temp);
 390                 if (temp == parent)
 391                         break;
 392         }
 393         LPROCFS_WRITE_EXIT();
 394 }
 395
 396 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 397 {
 398         LASSERT(parent != NULL);
 399         remove_proc_entry(name, parent);
 400 }
 401
 402 struct proc_dir_entry *lprocfs_register(const char *name,
 403                                         struct proc_dir_entry *parent,
 404                                         struct lprocfs_vars *list, void *data)
 405 {
 406         struct proc_dir_entry *newchild;
 407
 408         newchild = lprocfs_srch(parent, name);
 409         if (newchild != NULL) {
 410                 CERROR(" Lproc: Attempting to register %s more than once \n",
 411                        name);
 412                 return ERR_PTR(-EALREADY);
 413         }
 414
 415         newchild = proc_mkdir(name, parent);
 416         if (newchild != NULL && list != NULL) {
 417                 int rc = lprocfs_add_vars(newchild, list, data);
 418                 if (rc) {
 419                         lprocfs_remove(&newchild);
 420                         return ERR_PTR(rc);
 421                 }
 422         }
 423         return newchild;
 424 }
 425
 426 /* Generic callbacks */
 427 int lprocfs_rd_uint(char *page, char **start, off_t off,
 428                     int count, int *eof, void *data)
 429 {
 430         unsigned int *temp = data;
 431         return snprintf(page, count, "%u\n", *temp);
 432 }
 433
 434 int lprocfs_wr_uint(struct file *file, const char *buffer,
 435                     unsigned long count, void *data)
 436 {
 437         unsigned *p = data;
 438         char dummy[MAX_STRING_SIZE + 1], *end;
 439         unsigned long tmp;
 440
 441         dummy[MAX_STRING_SIZE] = '\0';
 442         if (cfs_copy_from_user(dummy, buffer, MAX_STRING_SIZE))
 443                 return -EFAULT;
 444
 445         tmp = simple_strtoul(dummy, &end, 0);
 446         if (dummy == end)
 447                 return -EINVAL;
 448
 449         *p = (unsigned int)tmp;
 450         return count;
 451 }
 452
 453 int lprocfs_rd_u64(char *page, char **start, off_t off,
 454                    int count, int *eof, void *data)
 455 {
 456         LASSERT(data != NULL);
 457         *eof = 1;
 458         return snprintf(page, count, LPU64"\n", *(__u64 *)data);
 459 }
 460
 461 int lprocfs_rd_atomic(char *page, char **start, off_t off,
 462                    int count, int *eof, void *data)
 463 {
 464         cfs_atomic_t *atom = data;
 465         LASSERT(atom != NULL);
 466         *eof = 1;
 467         return snprintf(page, count, "%d\n", cfs_atomic_read(atom));
 468 }
 469
 470 int lprocfs_wr_atomic(struct file *file, const char *buffer,
 471                       unsigned long count, void *data)
 472 {
 473         cfs_atomic_t *atm = data;
 474         int val = 0;
 475         int rc;
 476
 477         rc = lprocfs_write_helper(buffer, count, &val);
 478         if (rc < 0)
 479                 return rc;
 480
 481         if (val <= 0)
 482                 return -ERANGE;
 483
 484         cfs_atomic_set(atm, val);
 485         return count;
 486 }
 487
 488 int lprocfs_rd_uuid(char *page, char **start, off_t off, int count,
 489                     int *eof, void *data)
 490 {
 491         struct obd_device *obd = data;
 492
 493         LASSERT(obd != NULL);
 494         *eof = 1;
 495         return snprintf(page, count, "%s\n", obd->obd_uuid.uuid);
 496 }
 497
 498 int lprocfs_rd_name(char *page, char **start, off_t off, int count,
 499                     int *eof, void *data)
 500 {
 501         struct obd_device *dev = data;
 502
 503         LASSERT(dev != NULL);
 504         LASSERT(dev->obd_name != NULL);
 505         *eof = 1;
 506         return snprintf(page, count, "%s\n", dev->obd_name);
 507 }
 508
 509 int lprocfs_rd_fstype(char *page, char **start, off_t off, int count, int *eof,
 510                       void *data)
 511 {
 512         struct obd_device *obd = data;
 513
 514         LASSERT(obd != NULL);
 515         LASSERT(obd->obd_fsops != NULL);
 516         LASSERT(obd->obd_fsops->fs_type != NULL);
 517         return snprintf(page, count, "%s\n", obd->obd_fsops->fs_type);
 518 }
 519
 520 int lprocfs_rd_blksize(char *page, char **start, off_t off, int count,
 521                        int *eof, void *data)
 522 {
 523         struct obd_statfs osfs;
 524         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 525                             OBD_STATFS_NODELAY);
 526         if (!rc) {
 527                 *eof = 1;
 528                 rc = snprintf(page, count, "%u\n", osfs.os_bsize);
 529         }
 530         return rc;
 531 }
 532
 533 int lprocfs_rd_kbytestotal(char *page, char **start, off_t off, int count,
 534                            int *eof, void *data)
 535 {
 536         struct obd_statfs osfs;
 537         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 538                             OBD_STATFS_NODELAY);
 539         if (!rc) {
 540                 __u32 blk_size = osfs.os_bsize >> 10;
 541                 __u64 result = osfs.os_blocks;
 542
 543                 while (blk_size >>= 1)
 544                         result <<= 1;
 545
 546                 *eof = 1;
 547                 rc = snprintf(page, count, LPU64"\n", result);
 548         }
 549         return rc;
 550 }
 551
 552 int lprocfs_rd_kbytesfree(char *page, char **start, off_t off, int count,
 553                           int *eof, void *data)
 554 {
 555         struct obd_statfs osfs;
 556         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 557                             OBD_STATFS_NODELAY);
 558         if (!rc) {
 559                 __u32 blk_size = osfs.os_bsize >> 10;
 560                 __u64 result = osfs.os_bfree;
 561
 562                 while (blk_size >>= 1)
 563                         result <<= 1;
 564
 565                 *eof = 1;
 566                 rc = snprintf(page, count, LPU64"\n", result);
 567         }
 568         return rc;
 569 }
 570
 571 int lprocfs_rd_kbytesavail(char *page, char **start, off_t off, int count,
 572                            int *eof, void *data)
 573 {
 574         struct obd_statfs osfs;
 575         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 576                             OBD_STATFS_NODELAY);
 577         if (!rc) {
 578                 __u32 blk_size = osfs.os_bsize >> 10;
 579                 __u64 result = osfs.os_bavail;
 580
 581                 while (blk_size >>= 1)
 582                         result <<= 1;
 583
 584                 *eof = 1;
 585                 rc = snprintf(page, count, LPU64"\n", result);
 586         }
 587         return rc;
 588 }
 589
 590 int lprocfs_rd_filestotal(char *page, char **start, off_t off, int count,
 591                           int *eof, void *data)
 592 {
 593         struct obd_statfs osfs;
 594         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 595                             OBD_STATFS_NODELAY);
 596         if (!rc) {
 597                 *eof = 1;
 598                 rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 599         }
 600
 601         return rc;
 602 }
 603
 604 int lprocfs_rd_filesfree(char *page, char **start, off_t off, int count,
 605                          int *eof, void *data)
 606 {
 607         struct obd_statfs osfs;
 608         int rc = obd_statfs(data, &osfs, cfs_time_current_64() - CFS_HZ,
 609                             OBD_STATFS_NODELAY);
 610         if (!rc) {
 611                 *eof = 1;
 612                 rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 613         }
 614         return rc;
 615 }
 616
 617 int lprocfs_rd_server_uuid(char *page, char **start, off_t off, int count,
 618                            int *eof, void *data)
 619 {
 620         struct obd_device *obd = data;
 621         struct obd_import *imp;
 622         char *imp_state_name = NULL;
 623         int rc = 0;
 624
 625         LASSERT(obd != NULL);
 626         LPROCFS_CLIMP_CHECK(obd);
 627         imp = obd->u.cli.cl_import;
 628         imp_state_name = ptlrpc_import_state_name(imp->imp_state);
 629         *eof = 1;
 630         rc = snprintf(page, count, "%s\t%s%s\n",
 631                       obd2cli_tgt(obd), imp_state_name,
 632                       imp->imp_deactive ? "\tDEACTIVATED" : "");
 633
 634         LPROCFS_CLIMP_EXIT(obd);
 635         return rc;
 636 }
 637
 638 int lprocfs_rd_conn_uuid(char *page, char **start, off_t off, int count,
 639                          int *eof,  void *data)
 640 {
 641         struct obd_device *obd = data;
 642         struct ptlrpc_connection *conn;
 643         int rc = 0;
 644
 645         LASSERT(obd != NULL);
 646
 647         LPROCFS_CLIMP_CHECK(obd);
 648         conn = obd->u.cli.cl_import->imp_connection;
 649         *eof = 1;
 650         if (conn && obd->u.cli.cl_import) {
 651                 rc = snprintf(page, count, "%s\n",
 652                               conn->c_remote_uuid.uuid);
 653         } else {
 654                 rc = snprintf(page, count, "%s\n", "<none>");
 655         }
 656
 657         LPROCFS_CLIMP_EXIT(obd);
 658         return rc;
 659 }
 660
 661 /** add up per-cpu counters */
 662 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
 663                            struct lprocfs_counter *cnt)
 664 {
 665         unsigned int num_cpu;
 666         struct lprocfs_counter t;
 667         struct lprocfs_counter *percpu_cntr;
 668         int centry, i;
 669
 670         memset(cnt, 0, sizeof(*cnt));
 671
 672         if (stats == NULL) {
 673                 /* set count to 1 to avoid divide-by-zero errs in callers */
 674                 cnt->lc_count = 1;
 675                 return;
 676         }
 677
 678         cnt->lc_min = LC_MIN_INIT;
 679
 680         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
 681                 num_cpu = 1;
 682         else
 683                 num_cpu = cfs_num_possible_cpus();
 684
 685         for (i = 0; i < num_cpu; i++) {
 686                 percpu_cntr = &(stats->ls_percpu[i])->lp_cntr[idx];
 687
 688                 do {
 689                         centry = cfs_atomic_read(&percpu_cntr-> \
 690                                                  lc_cntl.la_entry);
 691                         t.lc_count = percpu_cntr->lc_count;
 692                         t.lc_sum = percpu_cntr->lc_sum;
 693                         t.lc_min = percpu_cntr->lc_min;
 694                         t.lc_max = percpu_cntr->lc_max;
 695                         t.lc_sumsquare = percpu_cntr->lc_sumsquare;
 696                 } while (centry != cfs_atomic_read(&percpu_cntr->lc_cntl. \
 697                                                    la_entry) &&
 698                          centry != cfs_atomic_read(&percpu_cntr->lc_cntl. \
 699                                                    la_exit));
 700                 cnt->lc_count += t.lc_count;
 701                 cnt->lc_sum += t.lc_sum;
 702                 if (t.lc_min < cnt->lc_min)
 703                         cnt->lc_min = t.lc_min;
 704                 if (t.lc_max > cnt->lc_max)
 705                         cnt->lc_max = t.lc_max;
 706                 cnt->lc_sumsquare += t.lc_sumsquare;
 707         }
 708
 709         cnt->lc_units = stats->ls_percpu[0]->lp_cntr[idx].lc_units;
 710 }
 711
 712 /**
 713  * Append a space separated list of current set flags to str.
 714  */
 715 #define flag2str(flag) \
 716         if (imp->imp_##flag && max - len > 0) \
 717              len += snprintf(str + len, max - len, "%s" #flag, len ? ", " : "");
 718 static int obd_import_flags2str(struct obd_import *imp, char *str, int max)
 719 {
 720         int len = 0;
 721
 722         if (imp->imp_obd->obd_no_recov)
 723                 len += snprintf(str, max - len, "no_recov");
 724
 725         flag2str(invalid);
 726         flag2str(deactive);
 727         flag2str(replayable);
 728         flag2str(pingable);
 729         flag2str(recon_bk);
 730         flag2str(last_recon);
 731         return len;
 732 }
 733 #undef flags2str
 734
 735 static const char *obd_connect_names[] = {
 736         "read_only",
 737         "lov_index",
 738         "unused",
 739         "write_grant",
 740         "server_lock",
 741         "version",
 742         "request_portal",
 743         "acl",
 744         "xattr",
 745         "create_on_write",
 746         "truncate_lock",
 747         "initial_transno",
 748         "inode_bit_locks",
 749         "join_file(obsolete)",
 750         "getattr_by_fid",
 751         "no_oh_for_devices",
 752         "remote_client",
 753         "remote_client_by_force",
 754         "max_byte_per_rpc",
 755         "64bit_qdata",
 756         "mds_capability",
 757         "oss_capability",
 758         "early_lock_cancel",
 759         "som",
 760         "adaptive_timeouts",
 761         "lru_resize",
 762         "mds_mds_connection",
 763         "real_conn",
 764         "change_qunit_size",
 765         "alt_checksum_algorithm",
 766         "fid_is_enabled",
 767         "version_recovery",
 768         "pools",
 769         "grant_shrink",
 770         "skip_orphan",
 771         NULL
 772 };
 773
 774 static int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 775 {
 776         __u64 mask = 1;
 777         int i, ret = 0;
 778
 779         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 780                 if (flags & mask)
 781                         ret += snprintf(page + ret, count - ret, "%s%s",
 782                                         ret ? sep : "", obd_connect_names[i]);
 783         }
 784         if (flags & ~(mask - 1))
 785                 ret += snprintf(page + ret, count - ret,
 786                                 "%sunknown flags "LPX64,
 787                                 ret ? sep : "", flags & ~(mask - 1));
 788         return ret;
 789 }
 790
 791 int lprocfs_rd_import(char *page, char **start, off_t off, int count,
 792                       int *eof, void *data)
 793 {
 794         struct lprocfs_counter ret;
 795         struct obd_device *obd = (struct obd_device *)data;
 796         struct obd_import *imp;
 797         int i, j, k, rw = 0;
 798
 799         LASSERT(obd != NULL);
 800         LPROCFS_CLIMP_CHECK(obd);
 801         imp = obd->u.cli.cl_import;
 802         *eof = 1;
 803
 804         i = snprintf(page, count,
 805                      "import:\n"
 806                      "    name: %s\n"
 807                      "    target: %s\n"
 808                      "    current_connection: %s\n"
 809                      "    state: %s\n"
 810                      "    connect_flags: [",
 811                      obd->obd_name,
 812                      obd2cli_tgt(obd),
 813                      imp->imp_connection->c_remote_uuid.uuid,
 814                      ptlrpc_import_state_name(imp->imp_state));
 815         i += obd_connect_flags2str(page + i, count - i,
 816                                    imp->imp_connect_data.ocd_connect_flags,
 817                                    ", ");
 818         i += snprintf(page + i, count - i,
 819                       "]\n"
 820                       "    import_flags: [");
 821         i += obd_import_flags2str(imp, page + i, count - i);
 822
 823         i += snprintf(page + i, count - i,
 824                       "]\n"
 825                       "    connection:\n"
 826                       "       connection_attempts: %u\n"
 827                       "       generation: %u\n"
 828                       "       in-progress_invalidations: %u\n",
 829                       imp->imp_conn_cnt,
 830                       imp->imp_generation,
 831                       cfs_atomic_read(&imp->imp_inval_count));
 832
 833         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 834         do_div(ret.lc_sum, ret.lc_count);
 835         i += snprintf(page + i, count - i,
 836                       "    rpcs:\n"
 837                       "       inflight: %u\n"
 838                       "       unregistering: %u\n"
 839                       "       timeouts: %u\n"
 840                       "       avg_waittime: "LPU64" %s\n",
 841                       cfs_atomic_read(&imp->imp_inflight),
 842                       cfs_atomic_read(&imp->imp_unregistering),
 843                       cfs_atomic_read(&imp->imp_timeouts),
 844                       ret.lc_sum, ret.lc_units);
 845
 846         k = 0;
 847         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 848                 if (imp->imp_at.iat_portal[j] == 0)
 849                         break;
 850                 k = max_t(unsigned int, k,
 851                           at_get(&imp->imp_at.iat_service_estimate[j]));
 852         }
 853         i += snprintf(page + i, count - i,
 854                       "    service_estimates:\n"
 855                       "       services: %u sec\n"
 856                       "       network: %u sec\n",
 857                       k,
 858                       at_get(&imp->imp_at.iat_net_latency));
 859
 860         i += snprintf(page + i, count - i,
 861                       "    transactions:\n"
 862                       "       last_replay: "LPU64"\n"
 863                       "       peer_committed: "LPU64"\n"
 864                       "       last_checked: "LPU64"\n",
 865                       imp->imp_last_replay_transno,
 866                       imp->imp_peer_committed_transno,
 867                       imp->imp_last_transno_checked);
 868
 869         /* avg data rates */
 870         for (rw = 0; rw <= 1; rw++) {
 871                 lprocfs_stats_collect(obd->obd_svc_stats,
 872                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 873                                       &ret);
 874                 if (ret.lc_sum > 0) {
 875                         do_div(ret.lc_sum, ret.lc_count);
 876                         i += snprintf(page + i, count - i,
 877                                       "    %s_data_averages:\n"
 878                                       "       bytes_per_rpc: "LPU64"\n",
 879                                       rw ? "write" : "read",
 880                                       ret.lc_sum);
 881                 }
 882                 k = (int)ret.lc_sum;
 883                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 884                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 885                 if (ret.lc_sum > 0) {
 886                         do_div(ret.lc_sum, ret.lc_count);
 887                         i += snprintf(page + i, count - i,
 888                                       "       %s_per_rpc: "LPU64"\n",
 889                                       ret.lc_units, ret.lc_sum);
 890                         j = (int)ret.lc_sum;
 891                         if (j > 0)
 892                                 i += snprintf(page + i, count - i,
 893                                               "       MB_per_sec: %u.%.02u\n",
 894                                               k / j, (100 * k / j) % 100);
 895                 }
 896         }
 897
 898         LPROCFS_CLIMP_EXIT(obd);
 899         return i;
 900 }
 901
 902 int lprocfs_rd_state(char *page, char **start, off_t off, int count,
 903                       int *eof, void *data)
 904 {
 905         struct obd_device *obd = (struct obd_device *)data;
 906         struct obd_import *imp;
 907         int i, j, k;
 908
 909         LASSERT(obd != NULL);
 910         LPROCFS_CLIMP_CHECK(obd);
 911         imp = obd->u.cli.cl_import;
 912         *eof = 1;
 913
 914         i = snprintf(page, count, "current_state: %s\n",
 915                      ptlrpc_import_state_name(imp->imp_state));
 916         i += snprintf(page + i, count - i,
 917                       "state_history:\n");
 918         k = imp->imp_state_hist_idx;
 919         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 920                 struct import_state_hist *ish =
 921                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 922                 if (ish->ish_state == 0)
 923                         continue;
 924                 i += snprintf(page + i, count - i, " - ["CFS_TIME_T", %s]\n",
 925                               ish->ish_time,
 926                               ptlrpc_import_state_name(ish->ish_state));
 927         }
 928
 929         LPROCFS_CLIMP_EXIT(obd);
 930         return i;
 931 }
 932
 933 int lprocfs_at_hist_helper(char *page, int count, int rc,
 934                            struct adaptive_timeout *at)
 935 {
 936         int i;
 937         for (i = 0; i < AT_BINS; i++)
 938                 rc += snprintf(page + rc, count - rc, "%3u ", at->at_hist[i]);
 939         rc += snprintf(page + rc, count - rc, "\n");
 940         return rc;
 941 }
 942
 943 /* See also ptlrpc_lprocfs_rd_timeouts */
 944 int lprocfs_rd_timeouts(char *page, char **start, off_t off, int count,
 945                         int *eof, void *data)
 946 {
 947         struct obd_device *obd = (struct obd_device *)data;
 948         struct obd_import *imp;
 949         unsigned int cur, worst;
 950         time_t now, worstt;
 951         struct dhms ts;
 952         int i, rc = 0;
 953
 954         LASSERT(obd != NULL);
 955         LPROCFS_CLIMP_CHECK(obd);
 956         imp = obd->u.cli.cl_import;
 957         *eof = 1;
 958
 959         now = cfs_time_current_sec();
 960
 961         /* Some network health info for kicks */
 962         s2dhms(&ts, now - imp->imp_last_reply_time);
 963         rc += snprintf(page + rc, count - rc,
 964                        "%-10s : %ld, "DHMS_FMT" ago\n",
 965                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
 966
 967         cur = at_get(&imp->imp_at.iat_net_latency);
 968         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 969         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 970         s2dhms(&ts, now - worstt);
 971         rc += snprintf(page + rc, count - rc,
 972                        "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 973                        "network", cur, worst, worstt, DHMS_VARS(&ts));
 974         rc = lprocfs_at_hist_helper(page, count, rc,
 975                                     &imp->imp_at.iat_net_latency);
 976
 977         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 978                 if (imp->imp_at.iat_portal[i] == 0)
 979                         break;
 980                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 981                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 982                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 983                 s2dhms(&ts, now - worstt);
 984                 rc += snprintf(page + rc, count - rc,
 985                                "portal %-2d  : cur %3u  worst %3u (at %ld, "
 986                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
 987                                cur, worst, worstt, DHMS_VARS(&ts));
 988                 rc = lprocfs_at_hist_helper(page, count, rc,
 989                                           &imp->imp_at.iat_service_estimate[i]);
 990         }
 991
 992         LPROCFS_CLIMP_EXIT(obd);
 993         return rc;
 994 }
 995
 996 int lprocfs_rd_connect_flags(char *page, char **start, off_t off,
 997                              int count, int *eof, void *data)
 998 {
 999         struct obd_device *obd = data;
1000         __u64 flags;
1001         int ret = 0;
1002
1003         LPROCFS_CLIMP_CHECK(obd);
1004         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1005         ret = snprintf(page, count, "flags="LPX64"\n", flags);
1006         ret += obd_connect_flags2str(page + ret, count - ret, flags, "\n");
1007         ret += snprintf(page + ret, count - ret, "\n");
1008         LPROCFS_CLIMP_EXIT(obd);
1009         return ret;
1010 }
1011 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
1012
1013 int lprocfs_rd_num_exports(char *page, char **start, off_t off, int count,
1014                            int *eof,  void *data)
1015 {
1016         struct obd_device *obd = data;
1017
1018         LASSERT(obd != NULL);
1019         *eof = 1;
1020         return snprintf(page, count, "%u\n", obd->obd_num_exports);
1021 }
1022
1023 int lprocfs_rd_numrefs(char *page, char **start, off_t off, int count,
1024                        int *eof, void *data)
1025 {
1026         struct obd_type *class = (struct obd_type*) data;
1027
1028         LASSERT(class != NULL);
1029         *eof = 1;
1030         return snprintf(page, count, "%d\n", class->typ_refcnt);
1031 }
1032
1033 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
1034 {
1035         int rc = 0;
1036
1037         LASSERT(obd != NULL);
1038         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1039         LASSERT(obd->obd_type->typ_procroot != NULL);
1040
1041         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1042                                                obd->obd_type->typ_procroot,
1043                                                list, obd);
1044         if (IS_ERR(obd->obd_proc_entry)) {
1045                 rc = PTR_ERR(obd->obd_proc_entry);
1046                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1047                 obd->obd_proc_entry = NULL;
1048         }
1049         return rc;
1050 }
1051
1052 int lprocfs_obd_cleanup(struct obd_device *obd)
1053 {
1054         if (!obd)
1055                 return -EINVAL;
1056         if (obd->obd_proc_exports_entry) {
1057                 /* Should be no exports left */
1058                 LASSERT(obd->obd_proc_exports_entry->subdir == NULL);
1059                 lprocfs_remove(&obd->obd_proc_exports_entry);
1060                 obd->obd_proc_exports_entry = NULL;
1061         }
1062         if (obd->obd_proc_entry) {
1063                 lprocfs_remove(&obd->obd_proc_entry);
1064                 obd->obd_proc_entry = NULL;
1065         }
1066         return 0;
1067 }
1068
1069 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
1070 {
1071         CDEBUG(D_CONFIG, "stat %p - data %p/%p/%p\n", client_stat,
1072                client_stat->nid_proc, client_stat->nid_stats,
1073                client_stat->nid_brw_stats);
1074
1075         LASSERTF(cfs_atomic_read(&client_stat->nid_exp_ref_count) == 0,
1076                  "count %d\n",
1077                  cfs_atomic_read(&client_stat->nid_exp_ref_count));
1078
1079         cfs_hlist_del_init(&client_stat->nid_hash);
1080
1081         if (client_stat->nid_proc)
1082                 lprocfs_remove(&client_stat->nid_proc);
1083
1084         if (client_stat->nid_stats)
1085                 lprocfs_free_stats(&client_stat->nid_stats);
1086
1087         if (client_stat->nid_brw_stats)
1088                 OBD_FREE_PTR(client_stat->nid_brw_stats);
1089
1090         if (client_stat->nid_ldlm_stats)
1091                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
1092
1093         OBD_FREE_PTR(client_stat);
1094         return;
1095
1096 }
1097
1098 void lprocfs_free_per_client_stats(struct obd_device *obd)
1099 {
1100         struct nid_stat *stat;
1101         ENTRY;
1102
1103         /* we need extra list - because hash_exit called to early */
1104         /* not need locking because all clients is died */
1105         while(!cfs_list_empty(&obd->obd_nid_stats)) {
1106                 stat = cfs_list_entry(obd->obd_nid_stats.next,
1107                                       struct nid_stat, nid_list);
1108                 cfs_list_del_init(&stat->nid_list);
1109                 lprocfs_free_client_stats(stat);
1110         }
1111
1112         EXIT;
1113 }
1114
1115 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1116                                           enum lprocfs_stats_flags flags)
1117 {
1118         struct lprocfs_stats *stats;
1119         unsigned int percpusize;
1120         unsigned int i, j;
1121         unsigned int num_cpu;
1122
1123         if (num == 0)
1124                 return NULL;
1125
1126         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1127                 num_cpu = 1;
1128         else
1129                 num_cpu = cfs_num_possible_cpus();
1130
1131         OBD_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_cpu]));
1132         if (stats == NULL)
1133                 return NULL;
1134
1135         if (flags & LPROCFS_STATS_FLAG_NOPERCPU) {
1136                 stats->ls_flags = flags;
1137                 cfs_spin_lock_init(&stats->ls_lock);
1138                 /* Use this lock only if there are no percpu areas */
1139         } else {
1140                 stats->ls_flags = 0;
1141         }
1142
1143         percpusize = offsetof(struct lprocfs_percpu, lp_cntr[num]);
1144         if (num_cpu > 1)
1145                 percpusize = CFS_L1_CACHE_ALIGN(percpusize);
1146
1147         for (i = 0; i < num_cpu; i++) {
1148                 OBD_ALLOC(stats->ls_percpu[i], percpusize);
1149                 if (stats->ls_percpu[i] == NULL) {
1150                         for (j = 0; j < i; j++) {
1151                                 OBD_FREE(stats->ls_percpu[j], percpusize);
1152                                 stats->ls_percpu[j] = NULL;
1153                         }
1154                         break;
1155                 }
1156         }
1157         if (stats->ls_percpu[0] == NULL) {
1158                 OBD_FREE(stats, offsetof(typeof(*stats),
1159                                          ls_percpu[num_cpu]));
1160                 return NULL;
1161         }
1162
1163         stats->ls_num = num;
1164         return stats;
1165 }
1166
1167 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1168 {
1169         struct lprocfs_stats *stats = *statsh;
1170         unsigned int num_cpu;
1171         unsigned int percpusize;
1172         unsigned int i;
1173
1174         if (stats == NULL || stats->ls_num == 0)
1175                 return;
1176         *statsh = NULL;
1177
1178         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1179                 num_cpu = 1;
1180         else
1181                 num_cpu = cfs_num_possible_cpus();
1182
1183         percpusize = offsetof(struct lprocfs_percpu, lp_cntr[stats->ls_num]);
1184         if (num_cpu > 1)
1185                 percpusize = CFS_L1_CACHE_ALIGN(percpusize);
1186         for (i = 0; i < num_cpu; i++)
1187                 OBD_FREE(stats->ls_percpu[i], percpusize);
1188         OBD_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_cpu]));
1189 }
1190
1191 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1192 {
1193         struct lprocfs_counter *percpu_cntr;
1194         int i,j;
1195         unsigned int num_cpu;
1196
1197         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU);
1198
1199         for (i = 0; i < num_cpu; i++) {
1200                 for (j = 0; j < stats->ls_num; j++) {
1201                         percpu_cntr = &(stats->ls_percpu[i])->lp_cntr[j];
1202                         cfs_atomic_inc(&percpu_cntr->lc_cntl.la_entry);
1203                         percpu_cntr->lc_count = 0;
1204                         percpu_cntr->lc_sum = 0;
1205                         percpu_cntr->lc_min = LC_MIN_INIT;
1206                         percpu_cntr->lc_max = 0;
1207                         percpu_cntr->lc_sumsquare = 0;
1208                         cfs_atomic_inc(&percpu_cntr->lc_cntl.la_exit);
1209                 }
1210         }
1211
1212         lprocfs_stats_unlock(stats);
1213 }
1214
1215 static ssize_t lprocfs_stats_seq_write(struct file *file, const char *buf,
1216                                        size_t len, loff_t *off)
1217 {
1218         struct seq_file *seq = file->private_data;
1219         struct lprocfs_stats *stats = seq->private;
1220
1221         lprocfs_clear_stats(stats);
1222
1223         return len;
1224 }
1225
1226 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1227 {
1228         struct lprocfs_stats *stats = p->private;
1229         /* return 1st cpu location */
1230         return (*pos >= stats->ls_num) ? NULL :
1231                 &(stats->ls_percpu[0]->lp_cntr[*pos]);
1232 }
1233
1234 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1235 {
1236 }
1237
1238 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1239 {
1240         struct lprocfs_stats *stats = p->private;
1241         ++*pos;
1242         return (*pos >= stats->ls_num) ? NULL :
1243                 &(stats->ls_percpu[0]->lp_cntr[*pos]);
1244 }
1245
1246 /* seq file export of one lprocfs counter */
1247 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1248 {
1249        struct lprocfs_stats *stats = p->private;
1250        struct lprocfs_counter *cntr = v;
1251        struct lprocfs_counter ret;
1252        int idx, rc = 0;
1253
1254        if (cntr == &(stats->ls_percpu[0])->lp_cntr[0]) {
1255                struct timeval now;
1256                cfs_gettimeofday(&now);
1257                rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
1258                                "snapshot_time", now.tv_sec, now.tv_usec);
1259                if (rc < 0)
1260                        return rc;
1261        }
1262        idx = cntr - &(stats->ls_percpu[0])->lp_cntr[0];
1263
1264        lprocfs_stats_collect(stats, idx, &ret);
1265
1266        if (ret.lc_count == 0)
1267                goto out;
1268
1269        rc = seq_printf(p, "%-25s "LPD64" samples [%s]", cntr->lc_name,
1270                        ret.lc_count, cntr->lc_units);
1271
1272        if (rc < 0)
1273                goto out;
1274
1275        if ((cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) && (ret.lc_count > 0)) {
1276                rc = seq_printf(p, " "LPD64" "LPD64" "LPD64,
1277                                ret.lc_min, ret.lc_max, ret.lc_sum);
1278                if (rc < 0)
1279                        goto out;
1280                if (cntr->lc_config & LPROCFS_CNTR_STDDEV)
1281                        rc = seq_printf(p, " "LPD64, ret.lc_sumsquare);
1282                if (rc < 0)
1283                        goto out;
1284        }
1285        rc = seq_printf(p, "\n");
1286  out:
1287        return (rc < 0) ? rc : 0;
1288 }
1289
1290 struct seq_operations lprocfs_stats_seq_sops = {
1291         start: lprocfs_stats_seq_start,
1292         stop:  lprocfs_stats_seq_stop,
1293         next:  lprocfs_stats_seq_next,
1294         show:  lprocfs_stats_seq_show,
1295 };
1296
1297 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1298 {
1299         struct proc_dir_entry *dp = PDE(inode);
1300         struct seq_file *seq;
1301         int rc;
1302
1303         if (LPROCFS_ENTRY_AND_CHECK(dp))
1304                 return -ENOENT;
1305
1306         rc = seq_open(file, &lprocfs_stats_seq_sops);
1307         if (rc) {
1308                 LPROCFS_EXIT();
1309                 return rc;
1310         }
1311         seq = file->private_data;
1312         seq->private = dp->data;
1313         return 0;
1314 }
1315
1316 struct file_operations lprocfs_stats_seq_fops = {
1317         .owner   = THIS_MODULE,
1318         .open    = lprocfs_stats_seq_open,
1319         .read    = seq_read,
1320         .write   = lprocfs_stats_seq_write,
1321         .llseek  = seq_lseek,
1322         .release = lprocfs_seq_release,
1323 };
1324
1325 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1326                            struct lprocfs_stats *stats)
1327 {
1328         struct proc_dir_entry *entry;
1329         LASSERT(root != NULL);
1330
1331         entry = create_proc_entry(name, 0644, root);
1332         if (entry == NULL)
1333                 return -ENOMEM;
1334         entry->proc_fops = &lprocfs_stats_seq_fops;
1335         entry->data = stats;
1336         return 0;
1337 }
1338
1339 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1340                           unsigned conf, const char *name, const char *units)
1341 {
1342         struct lprocfs_counter *c;
1343         int i;
1344         unsigned int num_cpu;
1345
1346         LASSERT(stats != NULL);
1347
1348         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU);
1349
1350         for (i = 0; i < num_cpu; i++) {
1351                 c = &(stats->ls_percpu[i]->lp_cntr[index]);
1352                 c->lc_config = conf;
1353                 c->lc_count = 0;
1354                 c->lc_sum = 0;
1355                 c->lc_min = LC_MIN_INIT;
1356                 c->lc_max = 0;
1357                 c->lc_name = name;
1358                 c->lc_units = units;
1359         }
1360
1361         lprocfs_stats_unlock(stats);
1362 }
1363 EXPORT_SYMBOL(lprocfs_counter_init);
1364
1365 #define LPROCFS_OBD_OP_INIT(base, stats, op)                               \
1366 do {                                                                       \
1367         unsigned int coffset = base + OBD_COUNTER_OFFSET(op);              \
1368         LASSERT(coffset < stats->ls_num);                                  \
1369         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");              \
1370 } while (0)
1371
1372 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
1373 {
1374         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
1375         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
1376         LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
1377         LPROCFS_OBD_OP_INIT(num_private_stats, stats, attach);
1378         LPROCFS_OBD_OP_INIT(num_private_stats, stats, detach);
1379         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
1380         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
1381         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
1382         LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
1383         LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
1384         LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
1385         LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
1386         LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
1387         LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
1388         LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
1389         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
1390         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
1391         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
1392         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_delete);
1393         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
1394         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
1395         LPROCFS_OBD_OP_INIT(num_private_stats, stats, packmd);
1396         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
1397         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preallocate);
1398         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precreate);
1399         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
1400         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create_async);
1401         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
1402         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
1403         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr_async);
1404         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
1405         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr_async);
1406         LPROCFS_OBD_OP_INIT(num_private_stats, stats, brw);
1407         LPROCFS_OBD_OP_INIT(num_private_stats, stats, merge_lvb);
1408         LPROCFS_OBD_OP_INIT(num_private_stats, stats, adjust_kms);
1409         LPROCFS_OBD_OP_INIT(num_private_stats, stats, punch);
1410         LPROCFS_OBD_OP_INIT(num_private_stats, stats, sync);
1411         LPROCFS_OBD_OP_INIT(num_private_stats, stats, migrate);
1412         LPROCFS_OBD_OP_INIT(num_private_stats, stats, copy);
1413         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iterate);
1414         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
1415         LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
1416         LPROCFS_OBD_OP_INIT(num_private_stats, stats, enqueue);
1417         LPROCFS_OBD_OP_INIT(num_private_stats, stats, change_cbdata);
1418         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cancel);
1419         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cancel_unused);
1420         LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
1421         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
1422         LPROCFS_OBD_OP_INIT(num_private_stats, stats, extent_calc);
1423         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_init);
1424         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_connect);
1425         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_finish);
1426         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pin);
1427         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpin);
1428         LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
1429         LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
1430         LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
1431         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
1432         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotacheck);
1433         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
1434         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quota_adjust_qunit);
1435         LPROCFS_OBD_OP_INIT(num_private_stats, stats, ping);
1436         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
1437         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
1438         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
1439         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
1440         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
1441         LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
1442 }
1443
1444 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
1445 {
1446         struct lprocfs_stats *stats;
1447         unsigned int num_stats;
1448         int rc, i;
1449
1450         LASSERT(obd->obd_stats == NULL);
1451         LASSERT(obd->obd_proc_entry != NULL);
1452         LASSERT(obd->obd_cntr_base == 0);
1453
1454         num_stats = ((int)sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
1455                 num_private_stats - 1 /* o_owner */;
1456         stats = lprocfs_alloc_stats(num_stats, 0);
1457         if (stats == NULL)
1458                 return -ENOMEM;
1459
1460         lprocfs_init_ops_stats(num_private_stats, stats);
1461
1462         for (i = num_private_stats; i < num_stats; i++) {
1463                 /* If this LBUGs, it is likely that an obd
1464                  * operation was added to struct obd_ops in
1465                  * <obd.h>, and that the corresponding line item
1466                  * LPROCFS_OBD_OP_INIT(.., .., opname)
1467                  * is missing from the list above. */
1468                 LASSERTF(stats->ls_percpu[0]->lp_cntr[i].lc_name != NULL,
1469                          "Missing obd_stat initializer obd_op "
1470                          "operation at offset %d.\n", i - num_private_stats);
1471         }
1472         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
1473         if (rc < 0) {
1474                 lprocfs_free_stats(&stats);
1475         } else {
1476                 obd->obd_stats  = stats;
1477                 obd->obd_cntr_base = num_private_stats;
1478         }
1479         return rc;
1480 }
1481
1482 void lprocfs_free_obd_stats(struct obd_device *obd)
1483 {
1484         if (obd->obd_stats)
1485                 lprocfs_free_stats(&obd->obd_stats);
1486 }
1487
1488 #define LPROCFS_MD_OP_INIT(base, stats, op)                             \
1489 do {                                                                    \
1490         unsigned int coffset = base + MD_COUNTER_OFFSET(op);            \
1491         LASSERT(coffset < stats->ls_num);                               \
1492         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");           \
1493 } while (0)
1494
1495 int lprocfs_alloc_md_stats(struct obd_device *obd,
1496                            unsigned num_private_stats)
1497 {
1498         struct lprocfs_stats *stats;
1499         unsigned int num_stats;
1500         int rc, i;
1501
1502         LASSERT(obd->md_stats == NULL);
1503         LASSERT(obd->obd_proc_entry != NULL);
1504         LASSERT(obd->md_cntr_base == 0);
1505
1506         num_stats = 1 + MD_COUNTER_OFFSET(revalidate_lock) +
1507                     num_private_stats;
1508         stats = lprocfs_alloc_stats(num_stats, 0);
1509         if (stats == NULL)
1510                 return -ENOMEM;
1511
1512         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
1513         LPROCFS_MD_OP_INIT(num_private_stats, stats, change_cbdata);
1514         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1515         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1516         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
1517         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1518         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1519         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1520         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1521         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1522         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1523         LPROCFS_MD_OP_INIT(num_private_stats, stats, is_subdir);
1524         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1525         LPROCFS_MD_OP_INIT(num_private_stats, stats, sync);
1526         LPROCFS_MD_OP_INIT(num_private_stats, stats, readpage);
1527         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1528         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1529         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1530         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1531         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1532         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1533         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1534         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1535         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1536         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1537         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1538         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
1539         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
1540         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
1541         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1542         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1543
1544         for (i = num_private_stats; i < num_stats; i++) {
1545                 if (stats->ls_percpu[0]->lp_cntr[i].lc_name == NULL) {
1546                         CERROR("Missing md_stat initializer md_op "
1547                                "operation at offset %d. Aborting.\n",
1548                                i - num_private_stats);
1549                         LBUG();
1550                 }
1551         }
1552         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1553         if (rc < 0) {
1554                 lprocfs_free_stats(&stats);
1555         } else {
1556                 obd->md_stats  = stats;
1557                 obd->md_cntr_base = num_private_stats;
1558         }
1559         return rc;
1560 }
1561
1562 void lprocfs_free_md_stats(struct obd_device *obd)
1563 {
1564         struct lprocfs_stats *stats = obd->md_stats;
1565
1566         if (stats != NULL) {
1567                 obd->md_stats = NULL;
1568                 obd->md_cntr_base = 0;
1569                 lprocfs_free_stats(&stats);
1570         }
1571 }
1572
1573 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1574 {
1575         lprocfs_counter_init(ldlm_stats,
1576                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
1577                              0, "ldlm_enqueue", "reqs");
1578         lprocfs_counter_init(ldlm_stats,
1579                              LDLM_CONVERT - LDLM_FIRST_OPC,
1580                              0, "ldlm_convert", "reqs");
1581         lprocfs_counter_init(ldlm_stats,
1582                              LDLM_CANCEL - LDLM_FIRST_OPC,
1583                              0, "ldlm_cancel", "reqs");
1584         lprocfs_counter_init(ldlm_stats,
1585                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1586                              0, "ldlm_bl_callback", "reqs");
1587         lprocfs_counter_init(ldlm_stats,
1588                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1589                              0, "ldlm_cp_callback", "reqs");
1590         lprocfs_counter_init(ldlm_stats,
1591                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1592                              0, "ldlm_gl_callback", "reqs");
1593 }
1594
1595 int lprocfs_exp_rd_nid(char *page, char **start, off_t off, int count,
1596                          int *eof,  void *data)
1597 {
1598         struct obd_export *exp = data;
1599         LASSERT(exp != NULL);
1600         *eof = 1;
1601         return snprintf(page, count, "%s\n", obd_export_nid2str(exp));
1602 }
1603
1604 struct exp_uuid_cb_data {
1605         char                   *page;
1606         int                     count;
1607         int                    *eof;
1608         int                    *len;
1609 };
1610
1611 static void
1612 lprocfs_exp_rd_cb_data_init(struct exp_uuid_cb_data *cb_data, char *page,
1613                             int count, int *eof, int *len)
1614 {
1615         cb_data->page = page;
1616         cb_data->count = count;
1617         cb_data->eof = eof;
1618         cb_data->len = len;
1619 }
1620
1621 void lprocfs_exp_print_uuid(void *obj, void *cb_data)
1622 {
1623         struct obd_export *exp = (struct obd_export *)obj;
1624         struct exp_uuid_cb_data *data = (struct exp_uuid_cb_data *)cb_data;
1625
1626         if (exp->exp_nid_stats)
1627                 *data->len += snprintf((data->page + *data->len),
1628                                        data->count, "%s\n",
1629                                        obd_uuid2str(&exp->exp_client_uuid));
1630 }
1631
1632 int lprocfs_exp_rd_uuid(char *page, char **start, off_t off, int count,
1633                         int *eof,  void *data)
1634 {
1635         struct nid_stat *stats = (struct nid_stat *)data;
1636         struct exp_uuid_cb_data cb_data;
1637         struct obd_device *obd = stats->nid_obd;
1638         int len = 0;
1639
1640         *eof = 1;
1641         page[0] = '\0';
1642         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
1643         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1644                               lprocfs_exp_print_uuid, &cb_data);
1645         return (*cb_data.len);
1646 }
1647
1648 void lprocfs_exp_print_hash(void *obj, void *cb_data)
1649 {
1650         struct exp_uuid_cb_data *data = cb_data;
1651         struct obd_export       *exp = obj;
1652         cfs_hash_t              *hs;
1653
1654         hs = exp->exp_lock_hash;
1655         if (hs) {
1656                 if (!*data->len)
1657                         *data->len += cfs_hash_debug_header(data->page,
1658                                                             data->count);
1659
1660                 *data->len += cfs_hash_debug_str(hs, data->page + *data->len,
1661                                                  data->count);
1662         }
1663 }
1664
1665 int lprocfs_exp_rd_hash(char *page, char **start, off_t off, int count,
1666                         int *eof,  void *data)
1667 {
1668         struct nid_stat *stats = (struct nid_stat *)data;
1669         struct exp_uuid_cb_data cb_data;
1670         struct obd_device *obd = stats->nid_obd;
1671         int len = 0;
1672
1673         *eof = 1;
1674         page[0] = '\0';
1675         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
1676
1677         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1678                               lprocfs_exp_print_hash, &cb_data);
1679         return (*cb_data.len);
1680 }
1681
1682 int lprocfs_nid_stats_clear_read(char *page, char **start, off_t off,
1683                                         int count, int *eof,  void *data)
1684 {
1685         *eof = 1;
1686         return snprintf(page, count, "%s\n",
1687                         "Write into this file to clear all nid stats and "
1688                         "stale nid entries");
1689 }
1690 EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
1691
1692 void lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
1693 {
1694         struct nid_stat *stat = obj;
1695         int i;
1696         ENTRY;
1697         /* object has only hash + iterate_all references.
1698          * add/delete blocked by hash bucket lock */
1699         CDEBUG(D_INFO,"refcnt %d\n", cfs_atomic_read(&stat->nid_exp_ref_count));
1700         if (cfs_atomic_read(&stat->nid_exp_ref_count) == 2) {
1701                 cfs_hlist_del_init(&stat->nid_hash);
1702                 nidstat_putref(stat);
1703                 cfs_spin_lock(&stat->nid_obd->obd_nid_lock);
1704                 cfs_list_move(&stat->nid_list, data);
1705                 cfs_spin_unlock(&stat->nid_obd->obd_nid_lock);
1706                 EXIT;
1707                 return;
1708         }
1709         /* we has reference to object - only clear data*/
1710         if (stat->nid_stats)
1711                 lprocfs_clear_stats(stat->nid_stats);
1712
1713         if (stat->nid_brw_stats) {
1714                 for (i = 0; i < BRW_LAST; i++)
1715                         lprocfs_oh_clear(&stat->nid_brw_stats->hist[i]);
1716         }
1717         EXIT;
1718         return;
1719 }
1720
1721 int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
1722                                          unsigned long count, void *data)
1723 {
1724         struct obd_device *obd = (struct obd_device *)data;
1725         struct nid_stat *client_stat;
1726         CFS_LIST_HEAD(free_list);
1727
1728         cfs_hash_for_each(obd->obd_nid_stats_hash,
1729                           lprocfs_nid_stats_clear_write_cb, &free_list);
1730
1731         while (!cfs_list_empty(&free_list)) {
1732                 client_stat = cfs_list_entry(free_list.next, struct nid_stat,
1733                                              nid_list);
1734                 cfs_list_del_init(&client_stat->nid_list);
1735                 lprocfs_free_client_stats(client_stat);
1736         }
1737
1738         return count;
1739 }
1740 EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
1741
1742 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
1743 {
1744         struct nid_stat *new_stat, *old_stat;
1745         struct obd_device *obd = NULL;
1746         cfs_proc_dir_entry_t *entry;
1747         char *buffer = NULL;
1748         int rc = 0;
1749         ENTRY;
1750
1751         *newnid = 0;
1752
1753         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
1754             !exp->exp_obd->obd_nid_stats_hash)
1755                 RETURN(-EINVAL);
1756
1757         /* not test against zero because eric say:
1758          * You may only test nid against another nid, or LNET_NID_ANY.
1759          * Anything else is nonsense.*/
1760         if (!nid || *nid == LNET_NID_ANY)
1761                 RETURN(0);
1762
1763         obd = exp->exp_obd;
1764
1765         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
1766
1767         OBD_ALLOC_PTR(new_stat);
1768         if (new_stat == NULL)
1769                 RETURN(-ENOMEM);
1770
1771         new_stat->nid               = *nid;
1772         new_stat->nid_obd           = exp->exp_obd;
1773         cfs_atomic_set(&new_stat->nid_exp_ref_count, 0);
1774
1775         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
1776                                            nid, &new_stat->nid_hash);
1777         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
1778                old_stat, libcfs_nid2str(*nid),
1779                cfs_atomic_read(&new_stat->nid_exp_ref_count));
1780
1781         /* Return -EALREADY here so that we know that the /proc
1782          * entry already has been created */
1783         if (old_stat != new_stat) {
1784                 cfs_spin_lock(&obd->obd_nid_lock);
1785                 if (exp->exp_nid_stats != old_stat) {
1786                         if (exp->exp_nid_stats)
1787                                 nidstat_putref(exp->exp_nid_stats);
1788                         exp->exp_nid_stats = old_stat;
1789                 } else {
1790                         /* cfs_hash_findadd_unique() has added
1791                          * old_stat's refcount */
1792                         nidstat_putref(old_stat);
1793                 }
1794
1795                 cfs_spin_unlock(&obd->obd_nid_lock);
1796
1797                 GOTO(destroy_new, rc = -EALREADY);
1798         }
1799         /* not found - create */
1800         OBD_ALLOC(buffer, LNET_NIDSTR_SIZE);
1801         if (buffer == NULL)
1802                 GOTO(destroy_new, rc = -ENOMEM);
1803
1804         memcpy(buffer, libcfs_nid2str(*nid), LNET_NIDSTR_SIZE);
1805         new_stat->nid_proc = lprocfs_register(buffer,
1806                                               obd->obd_proc_exports_entry,
1807                                               NULL, NULL);
1808         OBD_FREE(buffer, LNET_NIDSTR_SIZE);
1809
1810         if (new_stat->nid_proc == NULL) {
1811                 CERROR("Error making export directory for nid %s\n",
1812                        libcfs_nid2str(*nid));
1813                 GOTO(destroy_new_ns, rc = -ENOMEM);
1814         }
1815
1816         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
1817                                    lprocfs_exp_rd_uuid, NULL, new_stat, NULL);
1818         if (IS_ERR(entry)) {
1819                 CWARN("Error adding the NID stats file\n");
1820                 rc = PTR_ERR(entry);
1821                 GOTO(destroy_new_ns, rc);
1822         }
1823
1824         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
1825                                    lprocfs_exp_rd_hash, NULL, new_stat, NULL);
1826         if (IS_ERR(entry)) {
1827                 CWARN("Error adding the hash file\n");
1828                 rc = PTR_ERR(entry);
1829                 GOTO(destroy_new_ns, rc);
1830         }
1831
1832         if (exp->exp_nid_stats)
1833                 nidstat_putref(exp->exp_nid_stats);
1834         nidstat_getref(new_stat);
1835         exp->exp_nid_stats = new_stat;
1836         *newnid = 1;
1837         /* protect competitive add to list, not need locking on destroy */
1838         cfs_spin_lock(&obd->obd_nid_lock);
1839         cfs_list_add(&new_stat->nid_list, &obd->obd_nid_stats);
1840         cfs_spin_unlock(&obd->obd_nid_lock);
1841
1842         RETURN(rc);
1843
1844 destroy_new_ns:
1845         if (new_stat->nid_proc != NULL)
1846                 lprocfs_remove(&new_stat->nid_proc);
1847         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
1848
1849 destroy_new:
1850         OBD_FREE_PTR(new_stat);
1851         RETURN(rc);
1852 }
1853
1854 int lprocfs_exp_cleanup(struct obd_export *exp)
1855 {
1856         struct nid_stat *stat = exp->exp_nid_stats;
1857
1858         if(!stat || !exp->exp_obd)
1859                 RETURN(0);
1860
1861         nidstat_putref(exp->exp_nid_stats);
1862         exp->exp_nid_stats = NULL;
1863
1864         return 0;
1865 }
1866
1867 int lprocfs_write_helper(const char *buffer, unsigned long count,
1868                          int *val)
1869 {
1870         return lprocfs_write_frac_helper(buffer, count, val, 1);
1871 }
1872
1873 int lprocfs_write_frac_helper(const char *buffer, unsigned long count,
1874                               int *val, int mult)
1875 {
1876         char kernbuf[20], *end, *pbuf;
1877
1878         if (count > (sizeof(kernbuf) - 1))
1879                 return -EINVAL;
1880
1881         if (cfs_copy_from_user(kernbuf, buffer, count))
1882                 return -EFAULT;
1883
1884         kernbuf[count] = '\0';
1885         pbuf = kernbuf;
1886         if (*pbuf == '-') {
1887                 mult = -mult;
1888                 pbuf++;
1889         }
1890
1891         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1892         if (pbuf == end)
1893                 return -EINVAL;
1894
1895         if (end != NULL && *end == '.') {
1896                 int temp_val, pow = 1;
1897                 int i;
1898
1899                 pbuf = end + 1;
1900                 if (strlen(pbuf) > 5)
1901                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
1902
1903                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1904
1905                 if (pbuf < end) {
1906                         for (i = 0; i < (end - pbuf); i++)
1907                                 pow *= 10;
1908
1909                         *val += temp_val / pow;
1910                 }
1911         }
1912         return 0;
1913 }
1914
1915 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
1916                              int mult)
1917 {
1918         long decimal_val, frac_val;
1919         int prtn;
1920
1921         if (count < 10)
1922                 return -EINVAL;
1923
1924         decimal_val = val / mult;
1925         prtn = snprintf(buffer, count, "%ld", decimal_val);
1926         frac_val = val % mult;
1927
1928         if (prtn < (count - 4) && frac_val > 0) {
1929                 long temp_frac;
1930                 int i, temp_mult = 1, frac_bits = 0;
1931
1932                 temp_frac = frac_val * 10;
1933                 buffer[prtn++] = '.';
1934                 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
1935                         /* only reserved 2 bits fraction */
1936                         buffer[prtn++] ='0';
1937                         temp_frac *= 10;
1938                         frac_bits++;
1939                 }
1940                 /*
1941                  * Need to think these cases :
1942                  *      1. #echo x.00 > /proc/xxx       output result : x
1943                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
1944                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
1945                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
1946                  *      Only reserved 2 bits fraction.
1947                  */
1948                 for (i = 0; i < (5 - prtn); i++)
1949                         temp_mult *= 10;
1950
1951                 frac_bits = min((int)count - prtn, 3 - frac_bits);
1952                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
1953                                  frac_val * temp_mult / mult);
1954
1955                 prtn--;
1956                 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
1957                         prtn--;
1958                         if (buffer[prtn] == '.') {
1959                                 prtn--;
1960                                 break;
1961                         }
1962                 }
1963                 prtn++;
1964         }
1965         buffer[prtn++] ='\n';
1966         return prtn;
1967 }
1968
1969 int lprocfs_write_u64_helper(const char *buffer, unsigned long count,__u64 *val)
1970 {
1971         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1972 }
1973
1974 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1975                               __u64 *val, int mult)
1976 {
1977         char kernbuf[22], *end, *pbuf;
1978         __u64 whole, frac = 0, units;
1979         unsigned frac_d = 1;
1980
1981         if (count > (sizeof(kernbuf) - 1))
1982                 return -EINVAL;
1983
1984         if (cfs_copy_from_user(kernbuf, buffer, count))
1985                 return -EFAULT;
1986
1987         kernbuf[count] = '\0';
1988         pbuf = kernbuf;
1989         if (*pbuf == '-') {
1990                 mult = -mult;
1991                 pbuf++;
1992         }
1993
1994         whole = simple_strtoull(pbuf, &end, 10);
1995         if (pbuf == end)
1996                 return -EINVAL;
1997
1998         if (end != NULL && *end == '.') {
1999                 int i;
2000                 pbuf = end + 1;
2001
2002                 /* need to limit frac_d to a __u32 */
2003                 if (strlen(pbuf) > 10)
2004                         pbuf[10] = '\0';
2005
2006                 frac = simple_strtoull(pbuf, &end, 10);
2007                 /* count decimal places */
2008                 for (i = 0; i < (end - pbuf); i++)
2009                         frac_d *= 10;
2010         }
2011
2012         units = 1;
2013         switch(*end) {
2014         case 'p': case 'P':
2015                 units <<= 10;
2016         case 't': case 'T':
2017                 units <<= 10;
2018         case 'g': case 'G':
2019                 units <<= 10;
2020         case 'm': case 'M':
2021                 units <<= 10;
2022         case 'k': case 'K':
2023                 units <<= 10;
2024         }
2025         /* Specified units override the multiplier */
2026         if (units)
2027                 mult = mult < 0 ? -units : units;
2028
2029         frac *= mult;
2030         do_div(frac, frac_d);
2031         *val = whole * mult + frac;
2032         return 0;
2033 }
2034
2035 int lprocfs_seq_create(cfs_proc_dir_entry_t *parent, char *name, mode_t mode,
2036                        struct file_operations *seq_fops, void *data)
2037 {
2038         struct proc_dir_entry *entry;
2039         ENTRY;
2040
2041         entry = create_proc_entry(name, mode, parent);
2042         if (entry == NULL)
2043                 RETURN(-ENOMEM);
2044         entry->proc_fops = seq_fops;
2045         entry->data = data;
2046
2047         RETURN(0);
2048 }
2049 EXPORT_SYMBOL(lprocfs_seq_create);
2050
2051 __inline__ int lprocfs_obd_seq_create(struct obd_device *dev, char *name,
2052                                       mode_t mode,
2053                                       struct file_operations *seq_fops,
2054                                       void *data)
2055 {
2056         return (lprocfs_seq_create(dev->obd_proc_entry, name,
2057                                    mode, seq_fops, data));
2058 }
2059 EXPORT_SYMBOL(lprocfs_obd_seq_create);
2060
2061 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2062 {
2063         if (value >= OBD_HIST_MAX)
2064                 value = OBD_HIST_MAX - 1;
2065
2066         cfs_spin_lock(&oh->oh_lock);
2067         oh->oh_buckets[value]++;
2068         cfs_spin_unlock(&oh->oh_lock);
2069 }
2070 EXPORT_SYMBOL(lprocfs_oh_tally);
2071
2072 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2073 {
2074         unsigned int val;
2075
2076         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
2077                 ;
2078
2079         lprocfs_oh_tally(oh, val);
2080 }
2081 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2082
2083 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2084 {
2085         unsigned long ret = 0;
2086         int i;
2087
2088         for (i = 0; i < OBD_HIST_MAX; i++)
2089                 ret +=  oh->oh_buckets[i];
2090         return ret;
2091 }
2092 EXPORT_SYMBOL(lprocfs_oh_sum);
2093
2094 void lprocfs_oh_clear(struct obd_histogram *oh)
2095 {
2096         cfs_spin_lock(&oh->oh_lock);
2097         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2098         cfs_spin_unlock(&oh->oh_lock);
2099 }
2100 EXPORT_SYMBOL(lprocfs_oh_clear);
2101
2102 int lprocfs_obd_rd_hash(char *page, char **start, off_t off,
2103                         int count, int *eof, void *data)
2104 {
2105         struct obd_device *obd = data;
2106         int c = 0;
2107
2108         if (obd == NULL)
2109                 return 0;
2110
2111         c += cfs_hash_debug_header(page, count);
2112         c += cfs_hash_debug_str(obd->obd_uuid_hash, page + c, count - c);
2113         c += cfs_hash_debug_str(obd->obd_nid_hash, page + c, count - c);
2114         c += cfs_hash_debug_str(obd->obd_nid_stats_hash, page+c, count-c);
2115
2116         return c;
2117 }
2118 EXPORT_SYMBOL(lprocfs_obd_rd_hash);
2119
2120 int lprocfs_obd_rd_recovery_status(char *page, char **start, off_t off,
2121                                    int count, int *eof, void *data)
2122 {
2123         struct obd_device *obd = data;
2124         int len = 0, size;
2125
2126         LASSERT(obd != NULL);
2127         LASSERT(count >= 0);
2128
2129         /* Set start of user data returned to
2130            page + off since the user may have
2131            requested to read much smaller than
2132            what we need to read */
2133         *start = page + off;
2134
2135         /* We know we are allocated a page here.
2136            Also we know that this function will
2137            not need to write more than a page
2138            so we can truncate at CFS_PAGE_SIZE.  */
2139         size = min(count + (int)off + 1, (int)CFS_PAGE_SIZE);
2140
2141         /* Initialize the page */
2142         memset(page, 0, size);
2143
2144         if (lprocfs_obd_snprintf(&page, size, &len, "status: ") <= 0)
2145                 goto out;
2146         if (obd->obd_max_recoverable_clients == 0) {
2147                 if (lprocfs_obd_snprintf(&page, size, &len, "INACTIVE\n") <= 0)
2148                         goto out;
2149
2150                 goto fclose;
2151         }
2152
2153         /* sampled unlocked, but really... */
2154         if (obd->obd_recovering == 0) {
2155                 if (lprocfs_obd_snprintf(&page, size, &len, "COMPLETE\n") <= 0)
2156                         goto out;
2157                 if (lprocfs_obd_snprintf(&page, size, &len,
2158                                          "recovery_start: %lu\n",
2159                                          obd->obd_recovery_start) <= 0)
2160                         goto out;
2161                 if (lprocfs_obd_snprintf(&page, size, &len,
2162                                          "recovery_duration: %lu\n",
2163                                          obd->obd_recovery_end -
2164                                          obd->obd_recovery_start) <= 0)
2165                         goto out;
2166                 /* Number of clients that have completed recovery */
2167                 if (lprocfs_obd_snprintf(&page, size, &len,
2168                                          "completed_clients: %d/%d\n",
2169                                          obd->obd_max_recoverable_clients -
2170                                          obd->obd_stale_clients,
2171                                          obd->obd_max_recoverable_clients) <= 0)
2172                         goto out;
2173                 if (lprocfs_obd_snprintf(&page, size, &len,
2174                                          "replayed_requests: %d\n",
2175                                          obd->obd_replayed_requests) <= 0)
2176                         goto out;
2177                 if (lprocfs_obd_snprintf(&page, size, &len,
2178                                          "last_transno: "LPD64"\n",
2179                                          obd->obd_next_recovery_transno - 1)<=0)
2180                         goto out;
2181                 if (lprocfs_obd_snprintf(&page, size, &len, "VBR: %s\n",
2182                                          obd->obd_version_recov ? "ON" : "OFF")<=0)
2183                         goto out;
2184                 goto fclose;
2185         }
2186
2187         if (lprocfs_obd_snprintf(&page, size, &len, "RECOVERING\n") <= 0)
2188                 goto out;
2189         if (lprocfs_obd_snprintf(&page, size, &len, "recovery_start: %lu\n",
2190                                  obd->obd_recovery_start) <= 0)
2191                 goto out;
2192         if (lprocfs_obd_snprintf(&page, size, &len, "time_remaining: %lu\n",
2193                            cfs_time_current_sec() >= obd->obd_recovery_end ? 0 :
2194                            obd->obd_recovery_end - cfs_time_current_sec()) <= 0)
2195                 goto out;
2196         if (lprocfs_obd_snprintf(&page, size, &len,"connected_clients: %d/%d\n",
2197                                  obd->obd_connected_clients,
2198                                  obd->obd_max_recoverable_clients) <= 0)
2199                 goto out;
2200         /* Number of clients that have completed recovery */
2201         if (lprocfs_obd_snprintf(&page, size, &len,"req_replay_clients: %d\n",
2202                                  cfs_atomic_read(&obd->obd_req_replay_clients))
2203                 <= 0)
2204                 goto out;
2205         if (lprocfs_obd_snprintf(&page, size, &len,"lock_repay_clients: %d\n",
2206                                  cfs_atomic_read(&obd->obd_lock_replay_clients))
2207                 <=0)
2208                 goto out;
2209         if (lprocfs_obd_snprintf(&page, size, &len,"completed_clients: %d\n",
2210                                  obd->obd_connected_clients -
2211                                  cfs_atomic_read(&obd->obd_lock_replay_clients))
2212                 <=0)
2213                 goto out;
2214         if (lprocfs_obd_snprintf(&page, size, &len,"evicted_clients: %d\n",
2215                                  obd->obd_stale_clients) <= 0)
2216                 goto out;
2217         if (lprocfs_obd_snprintf(&page, size, &len,"replayed_requests: %d\n",
2218                                  obd->obd_replayed_requests) <= 0)
2219                 goto out;
2220         if (lprocfs_obd_snprintf(&page, size, &len, "queued_requests: %d\n",
2221                                  obd->obd_requests_queued_for_recovery) <= 0)
2222                 goto out;
2223
2224         if (lprocfs_obd_snprintf(&page, size, &len, "next_transno: "LPD64"\n",
2225                                  obd->obd_next_recovery_transno) <= 0)
2226                 goto out;
2227
2228 fclose:
2229         *eof = 1;
2230 out:
2231         return min(count, len - (int)off);
2232 }
2233 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_status);
2234
2235 int lprocfs_obd_rd_recovery_maxtime(char *page, char **start, off_t off,
2236                                     int count, int *eof, void *data)
2237 {
2238         struct obd_device *obd = data;
2239         LASSERT(obd != NULL);
2240
2241         return snprintf(page, count, "%lu\n", obd->obd_recovery_max_time);
2242 }
2243 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_maxtime);
2244
2245 int lprocfs_obd_wr_recovery_maxtime(struct file *file, const char *buffer,
2246                                     unsigned long count, void *data)
2247 {
2248         struct obd_device *obd = data;
2249         int val, rc;
2250         LASSERT(obd != NULL);
2251
2252         rc = lprocfs_write_helper(buffer, count, &val);
2253         if (rc)
2254                 return rc;
2255
2256         obd->obd_recovery_max_time = val;
2257         return count;
2258 }
2259 EXPORT_SYMBOL(lprocfs_obd_wr_recovery_maxtime);
2260
2261
2262 EXPORT_SYMBOL(lprocfs_register);
2263 EXPORT_SYMBOL(lprocfs_srch);
2264 EXPORT_SYMBOL(lprocfs_remove);
2265 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
2266 EXPORT_SYMBOL(lprocfs_add_vars);
2267 EXPORT_SYMBOL(lprocfs_obd_setup);
2268 EXPORT_SYMBOL(lprocfs_obd_cleanup);
2269 EXPORT_SYMBOL(lprocfs_add_simple);
2270 EXPORT_SYMBOL(lprocfs_add_symlink);
2271 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
2272 EXPORT_SYMBOL(lprocfs_alloc_stats);
2273 EXPORT_SYMBOL(lprocfs_free_stats);
2274 EXPORT_SYMBOL(lprocfs_clear_stats);
2275 EXPORT_SYMBOL(lprocfs_register_stats);
2276 EXPORT_SYMBOL(lprocfs_init_ops_stats);
2277 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
2278 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
2279 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
2280 EXPORT_SYMBOL(lprocfs_free_obd_stats);
2281 EXPORT_SYMBOL(lprocfs_free_md_stats);
2282 EXPORT_SYMBOL(lprocfs_exp_setup);
2283 EXPORT_SYMBOL(lprocfs_exp_cleanup);
2284
2285 EXPORT_SYMBOL(lprocfs_rd_u64);
2286 EXPORT_SYMBOL(lprocfs_rd_atomic);
2287 EXPORT_SYMBOL(lprocfs_wr_atomic);
2288 EXPORT_SYMBOL(lprocfs_rd_uint);
2289 EXPORT_SYMBOL(lprocfs_wr_uint);
2290 EXPORT_SYMBOL(lprocfs_rd_uuid);
2291 EXPORT_SYMBOL(lprocfs_rd_name);
2292 EXPORT_SYMBOL(lprocfs_rd_fstype);
2293 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
2294 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
2295 EXPORT_SYMBOL(lprocfs_rd_num_exports);
2296 EXPORT_SYMBOL(lprocfs_rd_numrefs);
2297 EXPORT_SYMBOL(lprocfs_at_hist_helper);
2298 EXPORT_SYMBOL(lprocfs_rd_import);
2299 EXPORT_SYMBOL(lprocfs_rd_state);
2300 EXPORT_SYMBOL(lprocfs_rd_timeouts);
2301 EXPORT_SYMBOL(lprocfs_rd_blksize);
2302 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
2303 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
2304 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
2305 EXPORT_SYMBOL(lprocfs_rd_filestotal);
2306 EXPORT_SYMBOL(lprocfs_rd_filesfree);
2307
2308 EXPORT_SYMBOL(lprocfs_write_helper);
2309 EXPORT_SYMBOL(lprocfs_write_frac_helper);
2310 EXPORT_SYMBOL(lprocfs_read_frac_helper);
2311 EXPORT_SYMBOL(lprocfs_write_u64_helper);
2312 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
2313 EXPORT_SYMBOL(lprocfs_stats_collect);
2314 #endif /* LPROCFS*/