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         "full20",
 772         NULL
 773 };
 774
 775 static int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
 776 {
 777         __u64 mask = 1;
 778         int i, ret = 0;
 779
 780         for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
 781                 if (flags & mask)
 782                         ret += snprintf(page + ret, count - ret, "%s%s",
 783                                         ret ? sep : "", obd_connect_names[i]);
 784         }
 785         if (flags & ~(mask - 1))
 786                 ret += snprintf(page + ret, count - ret,
 787                                 "%sunknown flags "LPX64,
 788                                 ret ? sep : "", flags & ~(mask - 1));
 789         return ret;
 790 }
 791
 792 int lprocfs_rd_import(char *page, char **start, off_t off, int count,
 793                       int *eof, void *data)
 794 {
 795         struct lprocfs_counter ret;
 796         struct obd_device *obd = (struct obd_device *)data;
 797         struct obd_import *imp;
 798         int i, j, k, rw = 0;
 799
 800         LASSERT(obd != NULL);
 801         LPROCFS_CLIMP_CHECK(obd);
 802         imp = obd->u.cli.cl_import;
 803         *eof = 1;
 804
 805         i = snprintf(page, count,
 806                      "import:\n"
 807                      "    name: %s\n"
 808                      "    target: %s\n"
 809                      "    current_connection: %s\n"
 810                      "    state: %s\n"
 811                      "    connect_flags: [",
 812                      obd->obd_name,
 813                      obd2cli_tgt(obd),
 814                      imp->imp_connection->c_remote_uuid.uuid,
 815                      ptlrpc_import_state_name(imp->imp_state));
 816         i += obd_connect_flags2str(page + i, count - i,
 817                                    imp->imp_connect_data.ocd_connect_flags,
 818                                    ", ");
 819         i += snprintf(page + i, count - i,
 820                       "]\n"
 821                       "    import_flags: [");
 822         i += obd_import_flags2str(imp, page + i, count - i);
 823
 824         i += snprintf(page + i, count - i,
 825                       "]\n"
 826                       "    connection:\n"
 827                       "       connection_attempts: %u\n"
 828                       "       generation: %u\n"
 829                       "       in-progress_invalidations: %u\n",
 830                       imp->imp_conn_cnt,
 831                       imp->imp_generation,
 832                       cfs_atomic_read(&imp->imp_inval_count));
 833
 834         lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
 835         if (ret.lc_count != 0)
 836                 do_div(ret.lc_sum, ret.lc_count);
 837         else
 838                 ret.lc_sum = 0;
 839         i += snprintf(page + i, count - i,
 840                       "    rpcs:\n"
 841                       "       inflight: %u\n"
 842                       "       unregistering: %u\n"
 843                       "       timeouts: %u\n"
 844                       "       avg_waittime: "LPU64" %s\n",
 845                       cfs_atomic_read(&imp->imp_inflight),
 846                       cfs_atomic_read(&imp->imp_unregistering),
 847                       cfs_atomic_read(&imp->imp_timeouts),
 848                       ret.lc_sum, ret.lc_units);
 849
 850         k = 0;
 851         for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
 852                 if (imp->imp_at.iat_portal[j] == 0)
 853                         break;
 854                 k = max_t(unsigned int, k,
 855                           at_get(&imp->imp_at.iat_service_estimate[j]));
 856         }
 857         i += snprintf(page + i, count - i,
 858                       "    service_estimates:\n"
 859                       "       services: %u sec\n"
 860                       "       network: %u sec\n",
 861                       k,
 862                       at_get(&imp->imp_at.iat_net_latency));
 863
 864         i += snprintf(page + i, count - i,
 865                       "    transactions:\n"
 866                       "       last_replay: "LPU64"\n"
 867                       "       peer_committed: "LPU64"\n"
 868                       "       last_checked: "LPU64"\n",
 869                       imp->imp_last_replay_transno,
 870                       imp->imp_peer_committed_transno,
 871                       imp->imp_last_transno_checked);
 872
 873         /* avg data rates */
 874         for (rw = 0; rw <= 1; rw++) {
 875                 lprocfs_stats_collect(obd->obd_svc_stats,
 876                                       PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
 877                                       &ret);
 878                 if (ret.lc_sum > 0 && ret.lc_count > 0) {
 879                         do_div(ret.lc_sum, ret.lc_count);
 880                         i += snprintf(page + i, count - i,
 881                                       "    %s_data_averages:\n"
 882                                       "       bytes_per_rpc: "LPU64"\n",
 883                                       rw ? "write" : "read",
 884                                       ret.lc_sum);
 885                 }
 886                 k = (int)ret.lc_sum;
 887                 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
 888                 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
 889                 if (ret.lc_sum > 0 && ret.lc_count != 0) {
 890                         do_div(ret.lc_sum, ret.lc_count);
 891                         i += snprintf(page + i, count - i,
 892                                       "       %s_per_rpc: "LPU64"\n",
 893                                       ret.lc_units, ret.lc_sum);
 894                         j = (int)ret.lc_sum;
 895                         if (j > 0)
 896                                 i += snprintf(page + i, count - i,
 897                                               "       MB_per_sec: %u.%.02u\n",
 898                                               k / j, (100 * k / j) % 100);
 899                 }
 900         }
 901
 902         LPROCFS_CLIMP_EXIT(obd);
 903         return i;
 904 }
 905
 906 int lprocfs_rd_state(char *page, char **start, off_t off, int count,
 907                       int *eof, void *data)
 908 {
 909         struct obd_device *obd = (struct obd_device *)data;
 910         struct obd_import *imp;
 911         int i, j, k;
 912
 913         LASSERT(obd != NULL);
 914         LPROCFS_CLIMP_CHECK(obd);
 915         imp = obd->u.cli.cl_import;
 916         *eof = 1;
 917
 918         i = snprintf(page, count, "current_state: %s\n",
 919                      ptlrpc_import_state_name(imp->imp_state));
 920         i += snprintf(page + i, count - i,
 921                       "state_history:\n");
 922         k = imp->imp_state_hist_idx;
 923         for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
 924                 struct import_state_hist *ish =
 925                         &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
 926                 if (ish->ish_state == 0)
 927                         continue;
 928                 i += snprintf(page + i, count - i, " - ["CFS_TIME_T", %s]\n",
 929                               ish->ish_time,
 930                               ptlrpc_import_state_name(ish->ish_state));
 931         }
 932
 933         LPROCFS_CLIMP_EXIT(obd);
 934         return i;
 935 }
 936
 937 int lprocfs_at_hist_helper(char *page, int count, int rc,
 938                            struct adaptive_timeout *at)
 939 {
 940         int i;
 941         for (i = 0; i < AT_BINS; i++)
 942                 rc += snprintf(page + rc, count - rc, "%3u ", at->at_hist[i]);
 943         rc += snprintf(page + rc, count - rc, "\n");
 944         return rc;
 945 }
 946
 947 /* See also ptlrpc_lprocfs_rd_timeouts */
 948 int lprocfs_rd_timeouts(char *page, char **start, off_t off, int count,
 949                         int *eof, void *data)
 950 {
 951         struct obd_device *obd = (struct obd_device *)data;
 952         struct obd_import *imp;
 953         unsigned int cur, worst;
 954         time_t now, worstt;
 955         struct dhms ts;
 956         int i, rc = 0;
 957
 958         LASSERT(obd != NULL);
 959         LPROCFS_CLIMP_CHECK(obd);
 960         imp = obd->u.cli.cl_import;
 961         *eof = 1;
 962
 963         now = cfs_time_current_sec();
 964
 965         /* Some network health info for kicks */
 966         s2dhms(&ts, now - imp->imp_last_reply_time);
 967         rc += snprintf(page + rc, count - rc,
 968                        "%-10s : %ld, "DHMS_FMT" ago\n",
 969                        "last reply", imp->imp_last_reply_time, DHMS_VARS(&ts));
 970
 971         cur = at_get(&imp->imp_at.iat_net_latency);
 972         worst = imp->imp_at.iat_net_latency.at_worst_ever;
 973         worstt = imp->imp_at.iat_net_latency.at_worst_time;
 974         s2dhms(&ts, now - worstt);
 975         rc += snprintf(page + rc, count - rc,
 976                        "%-10s : cur %3u  worst %3u (at %ld, "DHMS_FMT" ago) ",
 977                        "network", cur, worst, worstt, DHMS_VARS(&ts));
 978         rc = lprocfs_at_hist_helper(page, count, rc,
 979                                     &imp->imp_at.iat_net_latency);
 980
 981         for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
 982                 if (imp->imp_at.iat_portal[i] == 0)
 983                         break;
 984                 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
 985                 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
 986                 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
 987                 s2dhms(&ts, now - worstt);
 988                 rc += snprintf(page + rc, count - rc,
 989                                "portal %-2d  : cur %3u  worst %3u (at %ld, "
 990                                DHMS_FMT" ago) ", imp->imp_at.iat_portal[i],
 991                                cur, worst, worstt, DHMS_VARS(&ts));
 992                 rc = lprocfs_at_hist_helper(page, count, rc,
 993                                           &imp->imp_at.iat_service_estimate[i]);
 994         }
 995
 996         LPROCFS_CLIMP_EXIT(obd);
 997         return rc;
 998 }
 999
1000 int lprocfs_rd_connect_flags(char *page, char **start, off_t off,
1001                              int count, int *eof, void *data)
1002 {
1003         struct obd_device *obd = data;
1004         __u64 flags;
1005         int ret = 0;
1006
1007         LPROCFS_CLIMP_CHECK(obd);
1008         flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1009         ret = snprintf(page, count, "flags="LPX64"\n", flags);
1010         ret += obd_connect_flags2str(page + ret, count - ret, flags, "\n");
1011         ret += snprintf(page + ret, count - ret, "\n");
1012         LPROCFS_CLIMP_EXIT(obd);
1013         return ret;
1014 }
1015 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
1016
1017 int lprocfs_rd_num_exports(char *page, char **start, off_t off, int count,
1018                            int *eof,  void *data)
1019 {
1020         struct obd_device *obd = data;
1021
1022         LASSERT(obd != NULL);
1023         *eof = 1;
1024         return snprintf(page, count, "%u\n", obd->obd_num_exports);
1025 }
1026
1027 int lprocfs_rd_numrefs(char *page, char **start, off_t off, int count,
1028                        int *eof, void *data)
1029 {
1030         struct obd_type *class = (struct obd_type*) data;
1031
1032         LASSERT(class != NULL);
1033         *eof = 1;
1034         return snprintf(page, count, "%d\n", class->typ_refcnt);
1035 }
1036
1037 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list)
1038 {
1039         int rc = 0;
1040
1041         LASSERT(obd != NULL);
1042         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1043         LASSERT(obd->obd_type->typ_procroot != NULL);
1044
1045         obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1046                                                obd->obd_type->typ_procroot,
1047                                                list, obd);
1048         if (IS_ERR(obd->obd_proc_entry)) {
1049                 rc = PTR_ERR(obd->obd_proc_entry);
1050                 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1051                 obd->obd_proc_entry = NULL;
1052         }
1053         return rc;
1054 }
1055
1056 int lprocfs_obd_cleanup(struct obd_device *obd)
1057 {
1058         if (!obd)
1059                 return -EINVAL;
1060         if (obd->obd_proc_exports_entry) {
1061                 /* Should be no exports left */
1062                 LASSERT(obd->obd_proc_exports_entry->subdir == NULL);
1063                 lprocfs_remove(&obd->obd_proc_exports_entry);
1064                 obd->obd_proc_exports_entry = NULL;
1065         }
1066         if (obd->obd_proc_entry) {
1067                 lprocfs_remove(&obd->obd_proc_entry);
1068                 obd->obd_proc_entry = NULL;
1069         }
1070         return 0;
1071 }
1072
1073 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
1074 {
1075         CDEBUG(D_CONFIG, "stat %p - data %p/%p/%p\n", client_stat,
1076                client_stat->nid_proc, client_stat->nid_stats,
1077                client_stat->nid_brw_stats);
1078
1079         LASSERTF(cfs_atomic_read(&client_stat->nid_exp_ref_count) == 0,
1080                  "count %d\n",
1081                  cfs_atomic_read(&client_stat->nid_exp_ref_count));
1082
1083         cfs_hlist_del_init(&client_stat->nid_hash);
1084
1085         if (client_stat->nid_proc)
1086                 lprocfs_remove(&client_stat->nid_proc);
1087
1088         if (client_stat->nid_stats)
1089                 lprocfs_free_stats(&client_stat->nid_stats);
1090
1091         if (client_stat->nid_brw_stats)
1092                 OBD_FREE_PTR(client_stat->nid_brw_stats);
1093
1094         if (client_stat->nid_ldlm_stats)
1095                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
1096
1097         OBD_FREE_PTR(client_stat);
1098         return;
1099
1100 }
1101
1102 void lprocfs_free_per_client_stats(struct obd_device *obd)
1103 {
1104         struct nid_stat *stat;
1105         ENTRY;
1106
1107         /* we need extra list - because hash_exit called to early */
1108         /* not need locking because all clients is died */
1109         while(!cfs_list_empty(&obd->obd_nid_stats)) {
1110                 stat = cfs_list_entry(obd->obd_nid_stats.next,
1111                                       struct nid_stat, nid_list);
1112                 cfs_list_del_init(&stat->nid_list);
1113                 lprocfs_free_client_stats(stat);
1114         }
1115
1116         EXIT;
1117 }
1118
1119 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1120                                           enum lprocfs_stats_flags flags)
1121 {
1122         struct lprocfs_stats *stats;
1123         unsigned int percpusize;
1124         unsigned int i, j;
1125         unsigned int num_cpu;
1126
1127         if (num == 0)
1128                 return NULL;
1129
1130         if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1131                 num_cpu = 1;
1132         else
1133                 num_cpu = cfs_num_possible_cpus();
1134
1135         OBD_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_cpu]));
1136         if (stats == NULL)
1137                 return NULL;
1138
1139         if (flags & LPROCFS_STATS_FLAG_NOPERCPU) {
1140                 stats->ls_flags = flags;
1141                 cfs_spin_lock_init(&stats->ls_lock);
1142                 /* Use this lock only if there are no percpu areas */
1143         } else {
1144                 stats->ls_flags = 0;
1145         }
1146
1147         percpusize = offsetof(struct lprocfs_percpu, lp_cntr[num]);
1148         if (num_cpu > 1)
1149                 percpusize = CFS_L1_CACHE_ALIGN(percpusize);
1150
1151         for (i = 0; i < num_cpu; i++) {
1152                 OBD_ALLOC(stats->ls_percpu[i], percpusize);
1153                 if (stats->ls_percpu[i] == NULL) {
1154                         for (j = 0; j < i; j++) {
1155                                 OBD_FREE(stats->ls_percpu[j], percpusize);
1156                                 stats->ls_percpu[j] = NULL;
1157                         }
1158                         break;
1159                 }
1160         }
1161         if (stats->ls_percpu[0] == NULL) {
1162                 OBD_FREE(stats, offsetof(typeof(*stats),
1163                                          ls_percpu[num_cpu]));
1164                 return NULL;
1165         }
1166
1167         stats->ls_num = num;
1168         return stats;
1169 }
1170
1171 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1172 {
1173         struct lprocfs_stats *stats = *statsh;
1174         unsigned int num_cpu;
1175         unsigned int percpusize;
1176         unsigned int i;
1177
1178         if (stats == NULL || stats->ls_num == 0)
1179                 return;
1180         *statsh = NULL;
1181
1182         if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1183                 num_cpu = 1;
1184         else
1185                 num_cpu = cfs_num_possible_cpus();
1186
1187         percpusize = offsetof(struct lprocfs_percpu, lp_cntr[stats->ls_num]);
1188         if (num_cpu > 1)
1189                 percpusize = CFS_L1_CACHE_ALIGN(percpusize);
1190         for (i = 0; i < num_cpu; i++)
1191                 OBD_FREE(stats->ls_percpu[i], percpusize);
1192         OBD_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_cpu]));
1193 }
1194
1195 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1196 {
1197         struct lprocfs_counter *percpu_cntr;
1198         int i,j;
1199         unsigned int num_cpu;
1200
1201         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU);
1202
1203         for (i = 0; i < num_cpu; i++) {
1204                 for (j = 0; j < stats->ls_num; j++) {
1205                         percpu_cntr = &(stats->ls_percpu[i])->lp_cntr[j];
1206                         cfs_atomic_inc(&percpu_cntr->lc_cntl.la_entry);
1207                         percpu_cntr->lc_count = 0;
1208                         percpu_cntr->lc_sum = 0;
1209                         percpu_cntr->lc_min = LC_MIN_INIT;
1210                         percpu_cntr->lc_max = 0;
1211                         percpu_cntr->lc_sumsquare = 0;
1212                         cfs_atomic_inc(&percpu_cntr->lc_cntl.la_exit);
1213                 }
1214         }
1215
1216         lprocfs_stats_unlock(stats);
1217 }
1218
1219 static ssize_t lprocfs_stats_seq_write(struct file *file, const char *buf,
1220                                        size_t len, loff_t *off)
1221 {
1222         struct seq_file *seq = file->private_data;
1223         struct lprocfs_stats *stats = seq->private;
1224
1225         lprocfs_clear_stats(stats);
1226
1227         return len;
1228 }
1229
1230 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1231 {
1232         struct lprocfs_stats *stats = p->private;
1233         /* return 1st cpu location */
1234         return (*pos >= stats->ls_num) ? NULL :
1235                 &(stats->ls_percpu[0]->lp_cntr[*pos]);
1236 }
1237
1238 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1239 {
1240 }
1241
1242 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1243 {
1244         struct lprocfs_stats *stats = p->private;
1245         ++*pos;
1246         return (*pos >= stats->ls_num) ? NULL :
1247                 &(stats->ls_percpu[0]->lp_cntr[*pos]);
1248 }
1249
1250 /* seq file export of one lprocfs counter */
1251 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1252 {
1253        struct lprocfs_stats *stats = p->private;
1254        struct lprocfs_counter *cntr = v;
1255        struct lprocfs_counter ret;
1256        int idx, rc = 0;
1257
1258        if (cntr == &(stats->ls_percpu[0])->lp_cntr[0]) {
1259                struct timeval now;
1260                cfs_gettimeofday(&now);
1261                rc = seq_printf(p, "%-25s %lu.%lu secs.usecs\n",
1262                                "snapshot_time", now.tv_sec, now.tv_usec);
1263                if (rc < 0)
1264                        return rc;
1265        }
1266        idx = cntr - &(stats->ls_percpu[0])->lp_cntr[0];
1267
1268        lprocfs_stats_collect(stats, idx, &ret);
1269
1270        if (ret.lc_count == 0)
1271                goto out;
1272
1273        rc = seq_printf(p, "%-25s "LPD64" samples [%s]", cntr->lc_name,
1274                        ret.lc_count, cntr->lc_units);
1275
1276        if (rc < 0)
1277                goto out;
1278
1279        if ((cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) && (ret.lc_count > 0)) {
1280                rc = seq_printf(p, " "LPD64" "LPD64" "LPD64,
1281                                ret.lc_min, ret.lc_max, ret.lc_sum);
1282                if (rc < 0)
1283                        goto out;
1284                if (cntr->lc_config & LPROCFS_CNTR_STDDEV)
1285                        rc = seq_printf(p, " "LPD64, ret.lc_sumsquare);
1286                if (rc < 0)
1287                        goto out;
1288        }
1289        rc = seq_printf(p, "\n");
1290  out:
1291        return (rc < 0) ? rc : 0;
1292 }
1293
1294 struct seq_operations lprocfs_stats_seq_sops = {
1295         start: lprocfs_stats_seq_start,
1296         stop:  lprocfs_stats_seq_stop,
1297         next:  lprocfs_stats_seq_next,
1298         show:  lprocfs_stats_seq_show,
1299 };
1300
1301 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1302 {
1303         struct proc_dir_entry *dp = PDE(inode);
1304         struct seq_file *seq;
1305         int rc;
1306
1307         if (LPROCFS_ENTRY_AND_CHECK(dp))
1308                 return -ENOENT;
1309
1310         rc = seq_open(file, &lprocfs_stats_seq_sops);
1311         if (rc) {
1312                 LPROCFS_EXIT();
1313                 return rc;
1314         }
1315         seq = file->private_data;
1316         seq->private = dp->data;
1317         return 0;
1318 }
1319
1320 struct file_operations lprocfs_stats_seq_fops = {
1321         .owner   = THIS_MODULE,
1322         .open    = lprocfs_stats_seq_open,
1323         .read    = seq_read,
1324         .write   = lprocfs_stats_seq_write,
1325         .llseek  = seq_lseek,
1326         .release = lprocfs_seq_release,
1327 };
1328
1329 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1330                            struct lprocfs_stats *stats)
1331 {
1332         struct proc_dir_entry *entry;
1333         LASSERT(root != NULL);
1334
1335         entry = create_proc_entry(name, 0644, root);
1336         if (entry == NULL)
1337                 return -ENOMEM;
1338         entry->proc_fops = &lprocfs_stats_seq_fops;
1339         entry->data = stats;
1340         return 0;
1341 }
1342
1343 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1344                           unsigned conf, const char *name, const char *units)
1345 {
1346         struct lprocfs_counter *c;
1347         int i;
1348         unsigned int num_cpu;
1349
1350         LASSERT(stats != NULL);
1351
1352         num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU);
1353
1354         for (i = 0; i < num_cpu; i++) {
1355                 c = &(stats->ls_percpu[i]->lp_cntr[index]);
1356                 c->lc_config = conf;
1357                 c->lc_count = 0;
1358                 c->lc_sum = 0;
1359                 c->lc_min = LC_MIN_INIT;
1360                 c->lc_max = 0;
1361                 c->lc_name = name;
1362                 c->lc_units = units;
1363         }
1364
1365         lprocfs_stats_unlock(stats);
1366 }
1367 EXPORT_SYMBOL(lprocfs_counter_init);
1368
1369 #define LPROCFS_OBD_OP_INIT(base, stats, op)                               \
1370 do {                                                                       \
1371         unsigned int coffset = base + OBD_COUNTER_OFFSET(op);              \
1372         LASSERT(coffset < stats->ls_num);                                  \
1373         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");              \
1374 } while (0)
1375
1376 void lprocfs_init_ops_stats(int num_private_stats, struct lprocfs_stats *stats)
1377 {
1378         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iocontrol);
1379         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_info);
1380         LPROCFS_OBD_OP_INIT(num_private_stats, stats, set_info_async);
1381         LPROCFS_OBD_OP_INIT(num_private_stats, stats, attach);
1382         LPROCFS_OBD_OP_INIT(num_private_stats, stats, detach);
1383         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setup);
1384         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precleanup);
1385         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cleanup);
1386         LPROCFS_OBD_OP_INIT(num_private_stats, stats, process_config);
1387         LPROCFS_OBD_OP_INIT(num_private_stats, stats, postrecov);
1388         LPROCFS_OBD_OP_INIT(num_private_stats, stats, add_conn);
1389         LPROCFS_OBD_OP_INIT(num_private_stats, stats, del_conn);
1390         LPROCFS_OBD_OP_INIT(num_private_stats, stats, connect);
1391         LPROCFS_OBD_OP_INIT(num_private_stats, stats, reconnect);
1392         LPROCFS_OBD_OP_INIT(num_private_stats, stats, disconnect);
1393         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_init);
1394         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_fini);
1395         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_alloc);
1396         LPROCFS_OBD_OP_INIT(num_private_stats, stats, fid_delete);
1397         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs);
1398         LPROCFS_OBD_OP_INIT(num_private_stats, stats, statfs_async);
1399         LPROCFS_OBD_OP_INIT(num_private_stats, stats, packmd);
1400         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpackmd);
1401         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preallocate);
1402         LPROCFS_OBD_OP_INIT(num_private_stats, stats, precreate);
1403         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create);
1404         LPROCFS_OBD_OP_INIT(num_private_stats, stats, create_async);
1405         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy);
1406         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr);
1407         LPROCFS_OBD_OP_INIT(num_private_stats, stats, setattr_async);
1408         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr);
1409         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getattr_async);
1410         LPROCFS_OBD_OP_INIT(num_private_stats, stats, brw);
1411         LPROCFS_OBD_OP_INIT(num_private_stats, stats, merge_lvb);
1412         LPROCFS_OBD_OP_INIT(num_private_stats, stats, adjust_kms);
1413         LPROCFS_OBD_OP_INIT(num_private_stats, stats, punch);
1414         LPROCFS_OBD_OP_INIT(num_private_stats, stats, sync);
1415         LPROCFS_OBD_OP_INIT(num_private_stats, stats, migrate);
1416         LPROCFS_OBD_OP_INIT(num_private_stats, stats, copy);
1417         LPROCFS_OBD_OP_INIT(num_private_stats, stats, iterate);
1418         LPROCFS_OBD_OP_INIT(num_private_stats, stats, preprw);
1419         LPROCFS_OBD_OP_INIT(num_private_stats, stats, commitrw);
1420         LPROCFS_OBD_OP_INIT(num_private_stats, stats, enqueue);
1421         LPROCFS_OBD_OP_INIT(num_private_stats, stats, change_cbdata);
1422         LPROCFS_OBD_OP_INIT(num_private_stats, stats, find_cbdata);
1423         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cancel);
1424         LPROCFS_OBD_OP_INIT(num_private_stats, stats, cancel_unused);
1425         LPROCFS_OBD_OP_INIT(num_private_stats, stats, init_export);
1426         LPROCFS_OBD_OP_INIT(num_private_stats, stats, destroy_export);
1427         LPROCFS_OBD_OP_INIT(num_private_stats, stats, extent_calc);
1428         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_init);
1429         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_connect);
1430         LPROCFS_OBD_OP_INIT(num_private_stats, stats, llog_finish);
1431         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pin);
1432         LPROCFS_OBD_OP_INIT(num_private_stats, stats, unpin);
1433         LPROCFS_OBD_OP_INIT(num_private_stats, stats, import_event);
1434         LPROCFS_OBD_OP_INIT(num_private_stats, stats, notify);
1435         LPROCFS_OBD_OP_INIT(num_private_stats, stats, health_check);
1436         LPROCFS_OBD_OP_INIT(num_private_stats, stats, get_uuid);
1437         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotacheck);
1438         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quotactl);
1439         LPROCFS_OBD_OP_INIT(num_private_stats, stats, quota_adjust_qunit);
1440         LPROCFS_OBD_OP_INIT(num_private_stats, stats, ping);
1441         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_new);
1442         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_rem);
1443         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_add);
1444         LPROCFS_OBD_OP_INIT(num_private_stats, stats, pool_del);
1445         LPROCFS_OBD_OP_INIT(num_private_stats, stats, getref);
1446         LPROCFS_OBD_OP_INIT(num_private_stats, stats, putref);
1447 }
1448
1449 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned num_private_stats)
1450 {
1451         struct lprocfs_stats *stats;
1452         unsigned int num_stats;
1453         int rc, i;
1454
1455         LASSERT(obd->obd_stats == NULL);
1456         LASSERT(obd->obd_proc_entry != NULL);
1457         LASSERT(obd->obd_cntr_base == 0);
1458
1459         num_stats = ((int)sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
1460                 num_private_stats - 1 /* o_owner */;
1461         stats = lprocfs_alloc_stats(num_stats, 0);
1462         if (stats == NULL)
1463                 return -ENOMEM;
1464
1465         lprocfs_init_ops_stats(num_private_stats, stats);
1466
1467         for (i = num_private_stats; i < num_stats; i++) {
1468                 /* If this LBUGs, it is likely that an obd
1469                  * operation was added to struct obd_ops in
1470                  * <obd.h>, and that the corresponding line item
1471                  * LPROCFS_OBD_OP_INIT(.., .., opname)
1472                  * is missing from the list above. */
1473                 LASSERTF(stats->ls_percpu[0]->lp_cntr[i].lc_name != NULL,
1474                          "Missing obd_stat initializer obd_op "
1475                          "operation at offset %d.\n", i - num_private_stats);
1476         }
1477         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
1478         if (rc < 0) {
1479                 lprocfs_free_stats(&stats);
1480         } else {
1481                 obd->obd_stats  = stats;
1482                 obd->obd_cntr_base = num_private_stats;
1483         }
1484         return rc;
1485 }
1486
1487 void lprocfs_free_obd_stats(struct obd_device *obd)
1488 {
1489         if (obd->obd_stats)
1490                 lprocfs_free_stats(&obd->obd_stats);
1491 }
1492
1493 #define LPROCFS_MD_OP_INIT(base, stats, op)                             \
1494 do {                                                                    \
1495         unsigned int coffset = base + MD_COUNTER_OFFSET(op);            \
1496         LASSERT(coffset < stats->ls_num);                               \
1497         lprocfs_counter_init(stats, coffset, 0, #op, "reqs");           \
1498 } while (0)
1499
1500 int lprocfs_alloc_md_stats(struct obd_device *obd,
1501                            unsigned num_private_stats)
1502 {
1503         struct lprocfs_stats *stats;
1504         unsigned int num_stats;
1505         int rc, i;
1506
1507         LASSERT(obd->md_stats == NULL);
1508         LASSERT(obd->obd_proc_entry != NULL);
1509         LASSERT(obd->md_cntr_base == 0);
1510
1511         num_stats = 1 + MD_COUNTER_OFFSET(revalidate_lock) +
1512                     num_private_stats;
1513         stats = lprocfs_alloc_stats(num_stats, 0);
1514         if (stats == NULL)
1515                 return -ENOMEM;
1516
1517         LPROCFS_MD_OP_INIT(num_private_stats, stats, getstatus);
1518         LPROCFS_MD_OP_INIT(num_private_stats, stats, change_cbdata);
1519         LPROCFS_MD_OP_INIT(num_private_stats, stats, find_cbdata);
1520         LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1521         LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1522         LPROCFS_MD_OP_INIT(num_private_stats, stats, done_writing);
1523         LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1524         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1525         LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1526         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1527         LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1528         LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1529         LPROCFS_MD_OP_INIT(num_private_stats, stats, is_subdir);
1530         LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1531         LPROCFS_MD_OP_INIT(num_private_stats, stats, sync);
1532         LPROCFS_MD_OP_INIT(num_private_stats, stats, readpage);
1533         LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1534         LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1535         LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1536         LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1537         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1538         LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1539         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1540         LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1541         LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1542         LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1543         LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1544         LPROCFS_MD_OP_INIT(num_private_stats, stats, renew_capa);
1545         LPROCFS_MD_OP_INIT(num_private_stats, stats, unpack_capa);
1546         LPROCFS_MD_OP_INIT(num_private_stats, stats, get_remote_perm);
1547         LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1548         LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1549
1550         for (i = num_private_stats; i < num_stats; i++) {
1551                 if (stats->ls_percpu[0]->lp_cntr[i].lc_name == NULL) {
1552                         CERROR("Missing md_stat initializer md_op "
1553                                "operation at offset %d. Aborting.\n",
1554                                i - num_private_stats);
1555                         LBUG();
1556                 }
1557         }
1558         rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1559         if (rc < 0) {
1560                 lprocfs_free_stats(&stats);
1561         } else {
1562                 obd->md_stats  = stats;
1563                 obd->md_cntr_base = num_private_stats;
1564         }
1565         return rc;
1566 }
1567
1568 void lprocfs_free_md_stats(struct obd_device *obd)
1569 {
1570         struct lprocfs_stats *stats = obd->md_stats;
1571
1572         if (stats != NULL) {
1573                 obd->md_stats = NULL;
1574                 obd->md_cntr_base = 0;
1575                 lprocfs_free_stats(&stats);
1576         }
1577 }
1578
1579 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1580 {
1581         lprocfs_counter_init(ldlm_stats,
1582                              LDLM_ENQUEUE - LDLM_FIRST_OPC,
1583                              0, "ldlm_enqueue", "reqs");
1584         lprocfs_counter_init(ldlm_stats,
1585                              LDLM_CONVERT - LDLM_FIRST_OPC,
1586                              0, "ldlm_convert", "reqs");
1587         lprocfs_counter_init(ldlm_stats,
1588                              LDLM_CANCEL - LDLM_FIRST_OPC,
1589                              0, "ldlm_cancel", "reqs");
1590         lprocfs_counter_init(ldlm_stats,
1591                              LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1592                              0, "ldlm_bl_callback", "reqs");
1593         lprocfs_counter_init(ldlm_stats,
1594                              LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1595                              0, "ldlm_cp_callback", "reqs");
1596         lprocfs_counter_init(ldlm_stats,
1597                              LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1598                              0, "ldlm_gl_callback", "reqs");
1599 }
1600
1601 int lprocfs_exp_rd_nid(char *page, char **start, off_t off, int count,
1602                          int *eof,  void *data)
1603 {
1604         struct obd_export *exp = data;
1605         LASSERT(exp != NULL);
1606         *eof = 1;
1607         return snprintf(page, count, "%s\n", obd_export_nid2str(exp));
1608 }
1609
1610 struct exp_uuid_cb_data {
1611         char                   *page;
1612         int                     count;
1613         int                    *eof;
1614         int                    *len;
1615 };
1616
1617 static void
1618 lprocfs_exp_rd_cb_data_init(struct exp_uuid_cb_data *cb_data, char *page,
1619                             int count, int *eof, int *len)
1620 {
1621         cb_data->page = page;
1622         cb_data->count = count;
1623         cb_data->eof = eof;
1624         cb_data->len = len;
1625 }
1626
1627 void lprocfs_exp_print_uuid(void *obj, void *cb_data)
1628 {
1629         struct obd_export *exp = (struct obd_export *)obj;
1630         struct exp_uuid_cb_data *data = (struct exp_uuid_cb_data *)cb_data;
1631
1632         if (exp->exp_nid_stats)
1633                 *data->len += snprintf((data->page + *data->len),
1634                                        data->count, "%s\n",
1635                                        obd_uuid2str(&exp->exp_client_uuid));
1636 }
1637
1638 int lprocfs_exp_rd_uuid(char *page, char **start, off_t off, int count,
1639                         int *eof,  void *data)
1640 {
1641         struct nid_stat *stats = (struct nid_stat *)data;
1642         struct exp_uuid_cb_data cb_data;
1643         struct obd_device *obd = stats->nid_obd;
1644         int len = 0;
1645
1646         *eof = 1;
1647         page[0] = '\0';
1648         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
1649         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1650                               lprocfs_exp_print_uuid, &cb_data);
1651         return (*cb_data.len);
1652 }
1653
1654 void lprocfs_exp_print_hash(void *obj, void *cb_data)
1655 {
1656         struct exp_uuid_cb_data *data = cb_data;
1657         struct obd_export       *exp = obj;
1658         cfs_hash_t              *hs;
1659
1660         hs = exp->exp_lock_hash;
1661         if (hs) {
1662                 if (!*data->len)
1663                         *data->len += cfs_hash_debug_header(data->page,
1664                                                             data->count);
1665
1666                 *data->len += cfs_hash_debug_str(hs, data->page + *data->len,
1667                                                  data->count);
1668         }
1669 }
1670
1671 int lprocfs_exp_rd_hash(char *page, char **start, off_t off, int count,
1672                         int *eof,  void *data)
1673 {
1674         struct nid_stat *stats = (struct nid_stat *)data;
1675         struct exp_uuid_cb_data cb_data;
1676         struct obd_device *obd = stats->nid_obd;
1677         int len = 0;
1678
1679         *eof = 1;
1680         page[0] = '\0';
1681         lprocfs_exp_rd_cb_data_init(&cb_data, page, count, eof, &len);
1682
1683         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
1684                               lprocfs_exp_print_hash, &cb_data);
1685         return (*cb_data.len);
1686 }
1687
1688 int lprocfs_nid_stats_clear_read(char *page, char **start, off_t off,
1689                                         int count, int *eof,  void *data)
1690 {
1691         *eof = 1;
1692         return snprintf(page, count, "%s\n",
1693                         "Write into this file to clear all nid stats and "
1694                         "stale nid entries");
1695 }
1696 EXPORT_SYMBOL(lprocfs_nid_stats_clear_read);
1697
1698 int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
1699 {
1700         struct nid_stat *stat = obj;
1701         int i;
1702         ENTRY;
1703         /* object has only hash + iterate_all references.
1704          * add/delete blocked by hash bucket lock */
1705         CDEBUG(D_INFO,"refcnt %d\n", cfs_atomic_read(&stat->nid_exp_ref_count));
1706         if (cfs_atomic_read(&stat->nid_exp_ref_count) == 2) {
1707                 cfs_spin_lock(&stat->nid_obd->obd_nid_lock);
1708                 cfs_list_move(&stat->nid_list, data);
1709                 cfs_spin_unlock(&stat->nid_obd->obd_nid_lock);
1710                 RETURN(1);
1711         }
1712         /* we has reference to object - only clear data*/
1713         if (stat->nid_stats)
1714                 lprocfs_clear_stats(stat->nid_stats);
1715
1716         if (stat->nid_brw_stats) {
1717                 for (i = 0; i < BRW_LAST; i++)
1718                         lprocfs_oh_clear(&stat->nid_brw_stats->hist[i]);
1719         }
1720         RETURN(0);
1721 }
1722
1723 int lprocfs_nid_stats_clear_write(struct file *file, const char *buffer,
1724                                          unsigned long count, void *data)
1725 {
1726         struct obd_device *obd = (struct obd_device *)data;
1727         struct nid_stat *client_stat;
1728         CFS_LIST_HEAD(free_list);
1729
1730         cfs_hash_cond_del(obd->obd_nid_stats_hash,
1731                           lprocfs_nid_stats_clear_write_cb, &free_list);
1732
1733         while (!cfs_list_empty(&free_list)) {
1734                 client_stat = cfs_list_entry(free_list.next, struct nid_stat,
1735                                              nid_list);
1736                 cfs_list_del_init(&client_stat->nid_list);
1737                 lprocfs_free_client_stats(client_stat);
1738         }
1739
1740         return count;
1741 }
1742 EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
1743
1744 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
1745 {
1746         struct nid_stat *new_stat, *old_stat;
1747         struct obd_device *obd = NULL;
1748         cfs_proc_dir_entry_t *entry;
1749         char *buffer = NULL;
1750         int rc = 0;
1751         ENTRY;
1752
1753         *newnid = 0;
1754
1755         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
1756             !exp->exp_obd->obd_nid_stats_hash)
1757                 RETURN(-EINVAL);
1758
1759         /* not test against zero because eric say:
1760          * You may only test nid against another nid, or LNET_NID_ANY.
1761          * Anything else is nonsense.*/
1762         if (!nid || *nid == LNET_NID_ANY)
1763                 RETURN(0);
1764
1765         obd = exp->exp_obd;
1766
1767         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
1768
1769         OBD_ALLOC_PTR(new_stat);
1770         if (new_stat == NULL)
1771                 RETURN(-ENOMEM);
1772
1773         new_stat->nid               = *nid;
1774         new_stat->nid_obd           = exp->exp_obd;
1775         cfs_atomic_set(&new_stat->nid_exp_ref_count, 0);
1776
1777         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
1778                                            nid, &new_stat->nid_hash);
1779         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
1780                old_stat, libcfs_nid2str(*nid),
1781                cfs_atomic_read(&new_stat->nid_exp_ref_count));
1782
1783         /* Return -EALREADY here so that we know that the /proc
1784          * entry already has been created */
1785         if (old_stat != new_stat) {
1786                 cfs_spin_lock(&obd->obd_nid_lock);
1787                 if (exp->exp_nid_stats != old_stat) {
1788                         if (exp->exp_nid_stats)
1789                                 nidstat_putref(exp->exp_nid_stats);
1790                         exp->exp_nid_stats = old_stat;
1791                 } else {
1792                         /* cfs_hash_findadd_unique() has added
1793                          * old_stat's refcount */
1794                         nidstat_putref(old_stat);
1795                 }
1796
1797                 cfs_spin_unlock(&obd->obd_nid_lock);
1798
1799                 GOTO(destroy_new, rc = -EALREADY);
1800         }
1801         /* not found - create */
1802         OBD_ALLOC(buffer, LNET_NIDSTR_SIZE);
1803         if (buffer == NULL)
1804                 GOTO(destroy_new, rc = -ENOMEM);
1805
1806         memcpy(buffer, libcfs_nid2str(*nid), LNET_NIDSTR_SIZE);
1807         new_stat->nid_proc = lprocfs_register(buffer,
1808                                               obd->obd_proc_exports_entry,
1809                                               NULL, NULL);
1810         OBD_FREE(buffer, LNET_NIDSTR_SIZE);
1811
1812         if (new_stat->nid_proc == NULL) {
1813                 CERROR("Error making export directory for nid %s\n",
1814                        libcfs_nid2str(*nid));
1815                 GOTO(destroy_new_ns, rc = -ENOMEM);
1816         }
1817
1818         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
1819                                    lprocfs_exp_rd_uuid, NULL, new_stat, NULL);
1820         if (IS_ERR(entry)) {
1821                 CWARN("Error adding the NID stats file\n");
1822                 rc = PTR_ERR(entry);
1823                 GOTO(destroy_new_ns, rc);
1824         }
1825
1826         entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
1827                                    lprocfs_exp_rd_hash, NULL, new_stat, NULL);
1828         if (IS_ERR(entry)) {
1829                 CWARN("Error adding the hash file\n");
1830                 rc = PTR_ERR(entry);
1831                 GOTO(destroy_new_ns, rc);
1832         }
1833
1834         if (exp->exp_nid_stats)
1835                 nidstat_putref(exp->exp_nid_stats);
1836         nidstat_getref(new_stat);
1837         exp->exp_nid_stats = new_stat;
1838         *newnid = 1;
1839         /* protect competitive add to list, not need locking on destroy */
1840         cfs_spin_lock(&obd->obd_nid_lock);
1841         cfs_list_add(&new_stat->nid_list, &obd->obd_nid_stats);
1842         cfs_spin_unlock(&obd->obd_nid_lock);
1843
1844         RETURN(rc);
1845
1846 destroy_new_ns:
1847         if (new_stat->nid_proc != NULL)
1848                 lprocfs_remove(&new_stat->nid_proc);
1849         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
1850
1851 destroy_new:
1852         OBD_FREE_PTR(new_stat);
1853         RETURN(rc);
1854 }
1855
1856 int lprocfs_exp_cleanup(struct obd_export *exp)
1857 {
1858         struct nid_stat *stat = exp->exp_nid_stats;
1859
1860         if(!stat || !exp->exp_obd)
1861                 RETURN(0);
1862
1863         nidstat_putref(exp->exp_nid_stats);
1864         exp->exp_nid_stats = NULL;
1865
1866         return 0;
1867 }
1868
1869 int lprocfs_write_helper(const char *buffer, unsigned long count,
1870                          int *val)
1871 {
1872         return lprocfs_write_frac_helper(buffer, count, val, 1);
1873 }
1874
1875 int lprocfs_write_frac_helper(const char *buffer, unsigned long count,
1876                               int *val, int mult)
1877 {
1878         char kernbuf[20], *end, *pbuf;
1879
1880         if (count > (sizeof(kernbuf) - 1))
1881                 return -EINVAL;
1882
1883         if (cfs_copy_from_user(kernbuf, buffer, count))
1884                 return -EFAULT;
1885
1886         kernbuf[count] = '\0';
1887         pbuf = kernbuf;
1888         if (*pbuf == '-') {
1889                 mult = -mult;
1890                 pbuf++;
1891         }
1892
1893         *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1894         if (pbuf == end)
1895                 return -EINVAL;
1896
1897         if (end != NULL && *end == '.') {
1898                 int temp_val, pow = 1;
1899                 int i;
1900
1901                 pbuf = end + 1;
1902                 if (strlen(pbuf) > 5)
1903                         pbuf[5] = '\0'; /*only allow 5bits fractional*/
1904
1905                 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
1906
1907                 if (pbuf < end) {
1908                         for (i = 0; i < (end - pbuf); i++)
1909                                 pow *= 10;
1910
1911                         *val += temp_val / pow;
1912                 }
1913         }
1914         return 0;
1915 }
1916
1917 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
1918                              int mult)
1919 {
1920         long decimal_val, frac_val;
1921         int prtn;
1922
1923         if (count < 10)
1924                 return -EINVAL;
1925
1926         decimal_val = val / mult;
1927         prtn = snprintf(buffer, count, "%ld", decimal_val);
1928         frac_val = val % mult;
1929
1930         if (prtn < (count - 4) && frac_val > 0) {
1931                 long temp_frac;
1932                 int i, temp_mult = 1, frac_bits = 0;
1933
1934                 temp_frac = frac_val * 10;
1935                 buffer[prtn++] = '.';
1936                 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
1937                         /* only reserved 2 bits fraction */
1938                         buffer[prtn++] ='0';
1939                         temp_frac *= 10;
1940                         frac_bits++;
1941                 }
1942                 /*
1943                  * Need to think these cases :
1944                  *      1. #echo x.00 > /proc/xxx       output result : x
1945                  *      2. #echo x.0x > /proc/xxx       output result : x.0x
1946                  *      3. #echo x.x0 > /proc/xxx       output result : x.x
1947                  *      4. #echo x.xx > /proc/xxx       output result : x.xx
1948                  *      Only reserved 2 bits fraction.
1949                  */
1950                 for (i = 0; i < (5 - prtn); i++)
1951                         temp_mult *= 10;
1952
1953                 frac_bits = min((int)count - prtn, 3 - frac_bits);
1954                 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
1955                                  frac_val * temp_mult / mult);
1956
1957                 prtn--;
1958                 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
1959                         prtn--;
1960                         if (buffer[prtn] == '.') {
1961                                 prtn--;
1962                                 break;
1963                         }
1964                 }
1965                 prtn++;
1966         }
1967         buffer[prtn++] ='\n';
1968         return prtn;
1969 }
1970
1971 int lprocfs_write_u64_helper(const char *buffer, unsigned long count,__u64 *val)
1972 {
1973         return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1974 }
1975
1976 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1977                               __u64 *val, int mult)
1978 {
1979         char kernbuf[22], *end, *pbuf;
1980         __u64 whole, frac = 0, units;
1981         unsigned frac_d = 1;
1982
1983         if (count > (sizeof(kernbuf) - 1))
1984                 return -EINVAL;
1985
1986         if (cfs_copy_from_user(kernbuf, buffer, count))
1987                 return -EFAULT;
1988
1989         kernbuf[count] = '\0';
1990         pbuf = kernbuf;
1991         if (*pbuf == '-') {
1992                 mult = -mult;
1993                 pbuf++;
1994         }
1995
1996         whole = simple_strtoull(pbuf, &end, 10);
1997         if (pbuf == end)
1998                 return -EINVAL;
1999
2000         if (end != NULL && *end == '.') {
2001                 int i;
2002                 pbuf = end + 1;
2003
2004                 /* need to limit frac_d to a __u32 */
2005                 if (strlen(pbuf) > 10)
2006                         pbuf[10] = '\0';
2007
2008                 frac = simple_strtoull(pbuf, &end, 10);
2009                 /* count decimal places */
2010                 for (i = 0; i < (end - pbuf); i++)
2011                         frac_d *= 10;
2012         }
2013
2014         units = 1;
2015         switch(*end) {
2016         case 'p': case 'P':
2017                 units <<= 10;
2018         case 't': case 'T':
2019                 units <<= 10;
2020         case 'g': case 'G':
2021                 units <<= 10;
2022         case 'm': case 'M':
2023                 units <<= 10;
2024         case 'k': case 'K':
2025                 units <<= 10;
2026         }
2027         /* Specified units override the multiplier */
2028         if (units)
2029                 mult = mult < 0 ? -units : units;
2030
2031         frac *= mult;
2032         do_div(frac, frac_d);
2033         *val = whole * mult + frac;
2034         return 0;
2035 }
2036
2037 int lprocfs_seq_create(cfs_proc_dir_entry_t *parent, char *name, mode_t mode,
2038                        struct file_operations *seq_fops, void *data)
2039 {
2040         struct proc_dir_entry *entry;
2041         ENTRY;
2042
2043         entry = create_proc_entry(name, mode, parent);
2044         if (entry == NULL)
2045                 RETURN(-ENOMEM);
2046         entry->proc_fops = seq_fops;
2047         entry->data = data;
2048
2049         RETURN(0);
2050 }
2051 EXPORT_SYMBOL(lprocfs_seq_create);
2052
2053 __inline__ int lprocfs_obd_seq_create(struct obd_device *dev, char *name,
2054                                       mode_t mode,
2055                                       struct file_operations *seq_fops,
2056                                       void *data)
2057 {
2058         return (lprocfs_seq_create(dev->obd_proc_entry, name,
2059                                    mode, seq_fops, data));
2060 }
2061 EXPORT_SYMBOL(lprocfs_obd_seq_create);
2062
2063 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2064 {
2065         if (value >= OBD_HIST_MAX)
2066                 value = OBD_HIST_MAX - 1;
2067
2068         cfs_spin_lock(&oh->oh_lock);
2069         oh->oh_buckets[value]++;
2070         cfs_spin_unlock(&oh->oh_lock);
2071 }
2072 EXPORT_SYMBOL(lprocfs_oh_tally);
2073
2074 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2075 {
2076         unsigned int val;
2077
2078         for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
2079                 ;
2080
2081         lprocfs_oh_tally(oh, val);
2082 }
2083 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2084
2085 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2086 {
2087         unsigned long ret = 0;
2088         int i;
2089
2090         for (i = 0; i < OBD_HIST_MAX; i++)
2091                 ret +=  oh->oh_buckets[i];
2092         return ret;
2093 }
2094 EXPORT_SYMBOL(lprocfs_oh_sum);
2095
2096 void lprocfs_oh_clear(struct obd_histogram *oh)
2097 {
2098         cfs_spin_lock(&oh->oh_lock);
2099         memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2100         cfs_spin_unlock(&oh->oh_lock);
2101 }
2102 EXPORT_SYMBOL(lprocfs_oh_clear);
2103
2104 int lprocfs_obd_rd_hash(char *page, char **start, off_t off,
2105                         int count, int *eof, void *data)
2106 {
2107         struct obd_device *obd = data;
2108         int c = 0;
2109
2110         if (obd == NULL)
2111                 return 0;
2112
2113         c += cfs_hash_debug_header(page, count);
2114         c += cfs_hash_debug_str(obd->obd_uuid_hash, page + c, count - c);
2115         c += cfs_hash_debug_str(obd->obd_nid_hash, page + c, count - c);
2116         c += cfs_hash_debug_str(obd->obd_nid_stats_hash, page+c, count-c);
2117
2118         return c;
2119 }
2120 EXPORT_SYMBOL(lprocfs_obd_rd_hash);
2121
2122 int lprocfs_obd_rd_recovery_status(char *page, char **start, off_t off,
2123                                    int count, int *eof, void *data)
2124 {
2125         struct obd_device *obd = data;
2126         int len = 0, size;
2127
2128         LASSERT(obd != NULL);
2129         LASSERT(count >= 0);
2130
2131         /* Set start of user data returned to
2132            page + off since the user may have
2133            requested to read much smaller than
2134            what we need to read */
2135         *start = page + off;
2136
2137         /* We know we are allocated a page here.
2138            Also we know that this function will
2139            not need to write more than a page
2140            so we can truncate at CFS_PAGE_SIZE.  */
2141         size = min(count + (int)off + 1, (int)CFS_PAGE_SIZE);
2142
2143         /* Initialize the page */
2144         memset(page, 0, size);
2145
2146         if (lprocfs_obd_snprintf(&page, size, &len, "status: ") <= 0)
2147                 goto out;
2148         if (obd->obd_max_recoverable_clients == 0) {
2149                 if (lprocfs_obd_snprintf(&page, size, &len, "INACTIVE\n") <= 0)
2150                         goto out;
2151
2152                 goto fclose;
2153         }
2154
2155         /* sampled unlocked, but really... */
2156         if (obd->obd_recovering == 0) {
2157                 if (lprocfs_obd_snprintf(&page, size, &len, "COMPLETE\n") <= 0)
2158                         goto out;
2159                 if (lprocfs_obd_snprintf(&page, size, &len,
2160                                          "recovery_start: %lu\n",
2161                                          obd->obd_recovery_start) <= 0)
2162                         goto out;
2163                 if (lprocfs_obd_snprintf(&page, size, &len,
2164                                          "recovery_duration: %lu\n",
2165                                          obd->obd_recovery_end -
2166                                          obd->obd_recovery_start) <= 0)
2167                         goto out;
2168                 /* Number of clients that have completed recovery */
2169                 if (lprocfs_obd_snprintf(&page, size, &len,
2170                                          "completed_clients: %d/%d\n",
2171                                          obd->obd_max_recoverable_clients -
2172                                          obd->obd_stale_clients,
2173                                          obd->obd_max_recoverable_clients) <= 0)
2174                         goto out;
2175                 if (lprocfs_obd_snprintf(&page, size, &len,
2176                                          "replayed_requests: %d\n",
2177                                          obd->obd_replayed_requests) <= 0)
2178                         goto out;
2179                 if (lprocfs_obd_snprintf(&page, size, &len,
2180                                          "last_transno: "LPD64"\n",
2181                                          obd->obd_next_recovery_transno - 1)<=0)
2182                         goto out;
2183                 if (lprocfs_obd_snprintf(&page, size, &len, "VBR: %s\n",
2184                                          obd->obd_version_recov ? "ON" : "OFF")<=0)
2185                         goto out;
2186                 goto fclose;
2187         }
2188
2189         if (lprocfs_obd_snprintf(&page, size, &len, "RECOVERING\n") <= 0)
2190                 goto out;
2191         if (lprocfs_obd_snprintf(&page, size, &len, "recovery_start: %lu\n",
2192                                  obd->obd_recovery_start) <= 0)
2193                 goto out;
2194         if (lprocfs_obd_snprintf(&page, size, &len, "time_remaining: %lu\n",
2195                            cfs_time_current_sec() >= obd->obd_recovery_end ? 0 :
2196                            obd->obd_recovery_end - cfs_time_current_sec()) <= 0)
2197                 goto out;
2198         if (lprocfs_obd_snprintf(&page, size, &len,"connected_clients: %d/%d\n",
2199                                  obd->obd_connected_clients,
2200                                  obd->obd_max_recoverable_clients) <= 0)
2201                 goto out;
2202         /* Number of clients that have completed recovery */
2203         if (lprocfs_obd_snprintf(&page, size, &len,"req_replay_clients: %d\n",
2204                                  cfs_atomic_read(&obd->obd_req_replay_clients))
2205                 <= 0)
2206                 goto out;
2207         if (lprocfs_obd_snprintf(&page, size, &len,"lock_repay_clients: %d\n",
2208                                  cfs_atomic_read(&obd->obd_lock_replay_clients))
2209                 <=0)
2210                 goto out;
2211         if (lprocfs_obd_snprintf(&page, size, &len,"completed_clients: %d\n",
2212                                  obd->obd_connected_clients -
2213                                  cfs_atomic_read(&obd->obd_lock_replay_clients))
2214                 <=0)
2215                 goto out;
2216         if (lprocfs_obd_snprintf(&page, size, &len,"evicted_clients: %d\n",
2217                                  obd->obd_stale_clients) <= 0)
2218                 goto out;
2219         if (lprocfs_obd_snprintf(&page, size, &len,"replayed_requests: %d\n",
2220                                  obd->obd_replayed_requests) <= 0)
2221                 goto out;
2222         if (lprocfs_obd_snprintf(&page, size, &len, "queued_requests: %d\n",
2223                                  obd->obd_requests_queued_for_recovery) <= 0)
2224                 goto out;
2225
2226         if (lprocfs_obd_snprintf(&page, size, &len, "next_transno: "LPD64"\n",
2227                                  obd->obd_next_recovery_transno) <= 0)
2228                 goto out;
2229
2230 fclose:
2231         *eof = 1;
2232 out:
2233         return min(count, len - (int)off);
2234 }
2235 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_status);
2236
2237 int lprocfs_obd_rd_recovery_time_soft(char *page, char **start, off_t off,
2238                                       int count, int *eof, void *data)
2239 {
2240         struct obd_device *obd = (struct obd_device *)data;
2241         LASSERT(obd != NULL);
2242
2243         return snprintf(page, count, "%d\n",
2244                         obd->obd_recovery_timeout);
2245 }
2246 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_time_soft);
2247
2248 int lprocfs_obd_wr_recovery_time_soft(struct file *file, const char *buffer,
2249                                       unsigned long count, void *data)
2250 {
2251         struct obd_device *obd = (struct obd_device *)data;
2252         int val, rc;
2253         LASSERT(obd != NULL);
2254
2255         rc = lprocfs_write_helper(buffer, count, &val);
2256         if (rc)
2257                 return rc;
2258
2259         obd->obd_recovery_timeout = val;
2260         return count;
2261 }
2262 EXPORT_SYMBOL(lprocfs_obd_wr_recovery_time_soft);
2263
2264 int lprocfs_obd_rd_recovery_time_hard(char *page, char **start, off_t off,
2265                                       int count, int *eof, void *data)
2266 {
2267         struct obd_device *obd = data;
2268         LASSERT(obd != NULL);
2269
2270         return snprintf(page, count, "%lu\n", obd->obd_recovery_time_hard);
2271 }
2272 EXPORT_SYMBOL(lprocfs_obd_rd_recovery_time_hard);
2273
2274 int lprocfs_obd_wr_recovery_time_hard(struct file *file, const char *buffer,
2275                                       unsigned long count, void *data)
2276 {
2277         struct obd_device *obd = data;
2278         int val, rc;
2279         LASSERT(obd != NULL);
2280
2281         rc = lprocfs_write_helper(buffer, count, &val);
2282         if (rc)
2283                 return rc;
2284
2285         obd->obd_recovery_time_hard = val;
2286         return count;
2287 }
2288 EXPORT_SYMBOL(lprocfs_obd_wr_recovery_time_hard);
2289
2290 EXPORT_SYMBOL(lprocfs_register);
2291 EXPORT_SYMBOL(lprocfs_srch);
2292 EXPORT_SYMBOL(lprocfs_remove);
2293 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
2294 EXPORT_SYMBOL(lprocfs_add_vars);
2295 EXPORT_SYMBOL(lprocfs_obd_setup);
2296 EXPORT_SYMBOL(lprocfs_obd_cleanup);
2297 EXPORT_SYMBOL(lprocfs_add_simple);
2298 EXPORT_SYMBOL(lprocfs_add_symlink);
2299 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
2300 EXPORT_SYMBOL(lprocfs_alloc_stats);
2301 EXPORT_SYMBOL(lprocfs_free_stats);
2302 EXPORT_SYMBOL(lprocfs_clear_stats);
2303 EXPORT_SYMBOL(lprocfs_register_stats);
2304 EXPORT_SYMBOL(lprocfs_init_ops_stats);
2305 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
2306 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
2307 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
2308 EXPORT_SYMBOL(lprocfs_free_obd_stats);
2309 EXPORT_SYMBOL(lprocfs_free_md_stats);
2310 EXPORT_SYMBOL(lprocfs_exp_setup);
2311 EXPORT_SYMBOL(lprocfs_exp_cleanup);
2312
2313 EXPORT_SYMBOL(lprocfs_rd_u64);
2314 EXPORT_SYMBOL(lprocfs_rd_atomic);
2315 EXPORT_SYMBOL(lprocfs_wr_atomic);
2316 EXPORT_SYMBOL(lprocfs_rd_uint);
2317 EXPORT_SYMBOL(lprocfs_wr_uint);
2318 EXPORT_SYMBOL(lprocfs_rd_uuid);
2319 EXPORT_SYMBOL(lprocfs_rd_name);
2320 EXPORT_SYMBOL(lprocfs_rd_fstype);
2321 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
2322 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
2323 EXPORT_SYMBOL(lprocfs_rd_num_exports);
2324 EXPORT_SYMBOL(lprocfs_rd_numrefs);
2325 EXPORT_SYMBOL(lprocfs_at_hist_helper);
2326 EXPORT_SYMBOL(lprocfs_rd_import);
2327 EXPORT_SYMBOL(lprocfs_rd_state);
2328 EXPORT_SYMBOL(lprocfs_rd_timeouts);
2329 EXPORT_SYMBOL(lprocfs_rd_blksize);
2330 EXPORT_SYMBOL(lprocfs_rd_kbytestotal);
2331 EXPORT_SYMBOL(lprocfs_rd_kbytesfree);
2332 EXPORT_SYMBOL(lprocfs_rd_kbytesavail);
2333 EXPORT_SYMBOL(lprocfs_rd_filestotal);
2334 EXPORT_SYMBOL(lprocfs_rd_filesfree);
2335
2336 EXPORT_SYMBOL(lprocfs_write_helper);
2337 EXPORT_SYMBOL(lprocfs_write_frac_helper);
2338 EXPORT_SYMBOL(lprocfs_read_frac_helper);
2339 EXPORT_SYMBOL(lprocfs_write_u64_helper);
2340 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
2341 EXPORT_SYMBOL(lprocfs_stats_collect);
2342 #endif /* LPROCFS*/