lustre/llite/lproc_llite.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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * Copyright (c) 2011 Whamcloud, Inc.
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  */
  39 #define DEBUG_SUBSYSTEM S_LLITE
  40
  41 #include <linux/version.h>
  42 #include <lustre_lite.h>
  43 #include <lprocfs_status.h>
  44 #include <linux/seq_file.h>
  45 #include <obd_support.h>
  46
  47 #include "llite_internal.h"
  48
  49 struct proc_dir_entry *proc_lustre_fs_root;
  50
  51 #ifdef LPROCFS
  52 /* /proc/lustre/llite mount point registration */
  53 extern struct file_operations vvp_dump_pgcache_file_ops;
  54 struct file_operations ll_rw_extents_stats_fops;
  55 struct file_operations ll_rw_extents_stats_pp_fops;
  56 struct file_operations ll_rw_offset_stats_fops;
  57
  58 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  59                          int *eof, void *data)
  60 {
  61         struct super_block *sb = (struct super_block *)data;
  62         struct obd_statfs osfs;
  63         int rc;
  64
  65         LASSERT(sb != NULL);
  66         rc = ll_statfs_internal(sb, &osfs,
  67                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  68                                 OBD_STATFS_NODELAY);
  69         if (!rc) {
  70               *eof = 1;
  71               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  72         }
  73
  74         return rc;
  75 }
  76
  77 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  78                              int *eof, void *data)
  79 {
  80         struct super_block *sb = (struct super_block *)data;
  81         struct obd_statfs osfs;
  82         int rc;
  83
  84         LASSERT(sb != NULL);
  85         rc = ll_statfs_internal(sb, &osfs,
  86                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  87                                 OBD_STATFS_NODELAY);
  88         if (!rc) {
  89                 __u32 blk_size = osfs.os_bsize >> 10;
  90                 __u64 result = osfs.os_blocks;
  91
  92                 while (blk_size >>= 1)
  93                         result <<= 1;
  94
  95                 *eof = 1;
  96                 rc = snprintf(page, count, LPU64"\n", result);
  97         }
  98         return rc;
  99
 100 }
 101
 102 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
 103                             int *eof, void *data)
 104 {
 105         struct super_block *sb = (struct super_block *)data;
 106         struct obd_statfs osfs;
 107         int rc;
 108
 109         LASSERT(sb != NULL);
 110         rc = ll_statfs_internal(sb, &osfs,
 111                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 112                                 OBD_STATFS_NODELAY);
 113         if (!rc) {
 114                 __u32 blk_size = osfs.os_bsize >> 10;
 115                 __u64 result = osfs.os_bfree;
 116
 117                 while (blk_size >>= 1)
 118                         result <<= 1;
 119
 120                 *eof = 1;
 121                 rc = snprintf(page, count, LPU64"\n", result);
 122         }
 123         return rc;
 124 }
 125
 126 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 127                              int *eof, void *data)
 128 {
 129         struct super_block *sb = (struct super_block *)data;
 130         struct obd_statfs osfs;
 131         int rc;
 132
 133         LASSERT(sb != NULL);
 134         rc = ll_statfs_internal(sb, &osfs,
 135                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 136                                 OBD_STATFS_NODELAY);
 137         if (!rc) {
 138                 __u32 blk_size = osfs.os_bsize >> 10;
 139                 __u64 result = osfs.os_bavail;
 140
 141                 while (blk_size >>= 1)
 142                         result <<= 1;
 143
 144                 *eof = 1;
 145                 rc = snprintf(page, count, LPU64"\n", result);
 146         }
 147         return rc;
 148 }
 149
 150 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 151                             int *eof, void *data)
 152 {
 153         struct super_block *sb = (struct super_block *)data;
 154         struct obd_statfs osfs;
 155         int rc;
 156
 157         LASSERT(sb != NULL);
 158         rc = ll_statfs_internal(sb, &osfs,
 159                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 160                                 OBD_STATFS_NODELAY);
 161         if (!rc) {
 162                  *eof = 1;
 163                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 164         }
 165         return rc;
 166 }
 167
 168 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 169                            int *eof, void *data)
 170 {
 171         struct super_block *sb = (struct super_block *)data;
 172         struct obd_statfs osfs;
 173         int rc;
 174
 175         LASSERT(sb != NULL);
 176         rc = ll_statfs_internal(sb, &osfs,
 177                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 178                                 OBD_STATFS_NODELAY);
 179         if (!rc) {
 180                  *eof = 1;
 181                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 182         }
 183         return rc;
 184
 185 }
 186
 187 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 188                             int *eof, void *data)
 189 {
 190         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 191         int rc;
 192
 193         LASSERT(sbi != NULL);
 194
 195         *eof = 1;
 196         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 197                 rc = snprintf(page, count, "remote client\n");
 198         else
 199                 rc = snprintf(page, count, "local client\n");
 200
 201         return rc;
 202 }
 203
 204 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 205                         int *eof, void *data)
 206 {
 207         struct super_block *sb = (struct super_block*)data;
 208
 209         LASSERT(sb != NULL);
 210         *eof = 1;
 211         return snprintf(page, count, "%s\n", sb->s_type->name);
 212 }
 213
 214 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 215                          int *eof, void *data)
 216 {
 217         struct super_block *sb = (struct super_block *)data;
 218
 219         LASSERT(sb != NULL);
 220         *eof = 1;
 221         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 222 }
 223
 224 static int ll_rd_site_stats(char *page, char **start, off_t off,
 225                             int count, int *eof, void *data)
 226 {
 227         struct super_block *sb = data;
 228
 229         /*
 230          * See description of statistical counters in struct cl_site, and
 231          * struct lu_site.
 232          */
 233         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 234                                    page, count);
 235 }
 236
 237 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 238                                    int count, int *eof, void *data)
 239 {
 240         struct super_block *sb = data;
 241         struct ll_sb_info *sbi = ll_s2sbi(sb);
 242         long pages_number;
 243         int mult;
 244
 245         cfs_spin_lock(&sbi->ll_lock);
 246         pages_number = sbi->ll_ra_info.ra_max_pages;
 247         cfs_spin_unlock(&sbi->ll_lock);
 248
 249         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 250         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 251 }
 252
 253 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 254                                   unsigned long count, void *data)
 255 {
 256         struct super_block *sb = data;
 257         struct ll_sb_info *sbi = ll_s2sbi(sb);
 258         int mult, rc, pages_number;
 259
 260         mult = 1 << (20 - CFS_PAGE_SHIFT);
 261         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 262         if (rc)
 263                 return rc;
 264
 265         if (pages_number < 0 || pages_number > cfs_num_physpages / 2) {
 266                 CERROR("can't set file readahead more than %lu MB\n",
 267                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 268                 return -ERANGE;
 269         }
 270
 271         cfs_spin_lock(&sbi->ll_lock);
 272         sbi->ll_ra_info.ra_max_pages = pages_number;
 273         cfs_spin_unlock(&sbi->ll_lock);
 274
 275         return count;
 276 }
 277
 278 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 279                                            int count, int *eof, void *data)
 280 {
 281         struct super_block *sb = data;
 282         struct ll_sb_info *sbi = ll_s2sbi(sb);
 283         long pages_number;
 284         int mult;
 285
 286         cfs_spin_lock(&sbi->ll_lock);
 287         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 288         cfs_spin_unlock(&sbi->ll_lock);
 289
 290         mult = 1 << (20 - CFS_PAGE_SHIFT);
 291         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 292 }
 293
 294 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 295                                           unsigned long count, void *data)
 296 {
 297         struct super_block *sb = data;
 298         struct ll_sb_info *sbi = ll_s2sbi(sb);
 299         int mult, rc, pages_number;
 300
 301         mult = 1 << (20 - CFS_PAGE_SHIFT);
 302         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 303         if (rc)
 304                 return rc;
 305
 306         if (pages_number < 0 ||
 307                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 308                 CERROR("can't set file readahead more than"
 309                        "max_read_ahead_mb %lu MB\n",
 310                        sbi->ll_ra_info.ra_max_pages);
 311                 return -ERANGE;
 312         }
 313
 314         cfs_spin_lock(&sbi->ll_lock);
 315         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 316         cfs_spin_unlock(&sbi->ll_lock);
 317
 318         return count;
 319 }
 320
 321 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 322                                          int count, int *eof, void *data)
 323 {
 324         struct super_block *sb = data;
 325         struct ll_sb_info *sbi = ll_s2sbi(sb);
 326         long pages_number;
 327         int mult;
 328
 329         cfs_spin_lock(&sbi->ll_lock);
 330         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 331         cfs_spin_unlock(&sbi->ll_lock);
 332
 333         mult = 1 << (20 - CFS_PAGE_SHIFT);
 334         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 335 }
 336
 337 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 338                                          unsigned long count, void *data)
 339 {
 340         struct super_block *sb = data;
 341         struct ll_sb_info *sbi = ll_s2sbi(sb);
 342         int mult, rc, pages_number;
 343
 344         mult = 1 << (20 - CFS_PAGE_SHIFT);
 345         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 346         if (rc)
 347                 return rc;
 348
 349         /* Cap this at the current max readahead window size, the readahead
 350          * algorithm does this anyway so it's pointless to set it larger. */
 351         if (pages_number < 0 ||
 352             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 353                 CERROR("can't set max_read_ahead_whole_mb more than "
 354                        "max_read_ahead_per_file_mb: %lu\n",
 355                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
 356                 return -ERANGE;
 357         }
 358
 359         cfs_spin_lock(&sbi->ll_lock);
 360         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 361         cfs_spin_unlock(&sbi->ll_lock);
 362
 363         return count;
 364 }
 365
 366 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 367                                int count, int *eof, void *data)
 368 {
 369         struct super_block *sb = data;
 370         struct ll_sb_info *sbi = ll_s2sbi(sb);
 371         long pages_number;
 372         int mult;
 373
 374         cfs_spin_lock(&sbi->ll_lock);
 375         pages_number = sbi->ll_async_page_max;
 376         cfs_spin_unlock(&sbi->ll_lock);
 377
 378         mult = 1 << (20 - CFS_PAGE_SHIFT);
 379         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 380 }
 381
 382 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 383                                unsigned long count, void *data)
 384 {
 385         struct super_block *sb = data;
 386         struct ll_sb_info *sbi = ll_s2sbi(sb);
 387         int mult, rc, pages_number;
 388
 389         mult = 1 << (20 - CFS_PAGE_SHIFT);
 390         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 391         if (rc)
 392                 return rc;
 393
 394         if (pages_number < 0 || pages_number > cfs_num_physpages) {
 395                 CERROR("can't set max cache more than %lu MB\n",
 396                         cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 397                 return -ERANGE;
 398         }
 399
 400         cfs_spin_lock(&sbi->ll_lock);
 401         sbi->ll_async_page_max = pages_number ;
 402         cfs_spin_unlock(&sbi->ll_lock);
 403
 404         if (!sbi->ll_dt_exp)
 405                 /* Not set up yet, don't call llap_shrink_cache */
 406                 return count;
 407
 408         return count;
 409 }
 410
 411 static int ll_rd_checksum(char *page, char **start, off_t off,
 412                           int count, int *eof, void *data)
 413 {
 414         struct super_block *sb = data;
 415         struct ll_sb_info *sbi = ll_s2sbi(sb);
 416
 417         return snprintf(page, count, "%u\n",
 418                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 419 }
 420
 421 static int ll_wr_checksum(struct file *file, const char *buffer,
 422                           unsigned long count, void *data)
 423 {
 424         struct super_block *sb = data;
 425         struct ll_sb_info *sbi = ll_s2sbi(sb);
 426         int val, rc;
 427
 428         if (!sbi->ll_dt_exp)
 429                 /* Not set up yet */
 430                 return -EAGAIN;
 431
 432         rc = lprocfs_write_helper(buffer, count, &val);
 433         if (rc)
 434                 return rc;
 435         if (val)
 436                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 437         else
 438                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 439
 440         rc = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 441                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 442         if (rc)
 443                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 444
 445         return count;
 446 }
 447
 448 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 449                           int count, int *eof, void *data)
 450 {
 451         struct super_block *sb = data;
 452
 453         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 454 }
 455
 456 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 457                           unsigned long count, void *data)
 458 {
 459         struct super_block *sb = data;
 460         int rc, val;
 461
 462         rc = lprocfs_write_helper(buffer, count, &val);
 463         if (rc)
 464                 return rc;
 465         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 466         return count;
 467 }
 468
 469 static int ll_rd_track_id(char *page, int count, void *data,
 470                           enum stats_track_type type)
 471 {
 472         struct super_block *sb = data;
 473
 474         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 475                 return snprintf(page, count, "%d\n",
 476                                 ll_s2sbi(sb)->ll_stats_track_id);
 477
 478         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 479                 return snprintf(page, count, "0 (all)\n");
 480         } else {
 481                 return snprintf(page, count, "untracked\n");
 482         }
 483 }
 484
 485 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 486                           enum stats_track_type type)
 487 {
 488         struct super_block *sb = data;
 489         int rc, pid;
 490
 491         rc = lprocfs_write_helper(buffer, count, &pid);
 492         if (rc)
 493                 return rc;
 494         ll_s2sbi(sb)->ll_stats_track_id = pid;
 495         if (pid == 0)
 496                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 497         else
 498                 ll_s2sbi(sb)->ll_stats_track_type = type;
 499         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 500         return count;
 501 }
 502
 503 static int ll_rd_track_pid(char *page, char **start, off_t off,
 504                           int count, int *eof, void *data)
 505 {
 506         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 507 }
 508
 509 static int ll_wr_track_pid(struct file *file, const char *buffer,
 510                           unsigned long count, void *data)
 511 {
 512         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 513 }
 514
 515 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 516                           int count, int *eof, void *data)
 517 {
 518         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 519 }
 520
 521 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 522                           unsigned long count, void *data)
 523 {
 524         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 525 }
 526
 527 static int ll_rd_track_gid(char *page, char **start, off_t off,
 528                           int count, int *eof, void *data)
 529 {
 530         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 531 }
 532
 533 static int ll_wr_track_gid(struct file *file, const char *buffer,
 534                           unsigned long count, void *data)
 535 {
 536         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 537 }
 538
 539 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 540                                int count, int *eof, void *data)
 541 {
 542         struct super_block *sb = data;
 543         struct ll_sb_info *sbi = ll_s2sbi(sb);
 544
 545         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 546 }
 547
 548 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 549                                unsigned long count, void *data)
 550 {
 551         struct super_block *sb = data;
 552         struct ll_sb_info *sbi = ll_s2sbi(sb);
 553         int val, rc;
 554
 555         rc = lprocfs_write_helper(buffer, count, &val);
 556         if (rc)
 557                 return rc;
 558
 559         if (val >= 0 && val <= LL_SA_RPC_MAX)
 560                 sbi->ll_sa_max = val;
 561         else
 562                 CERROR("Bad statahead_max value %d. Valid values are in the "
 563                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 564
 565         return count;
 566 }
 567
 568 static int ll_rd_statahead_agl(char *page, char **start, off_t off,
 569                                int count, int *eof, void *data)
 570 {
 571         struct super_block *sb = data;
 572         struct ll_sb_info *sbi = ll_s2sbi(sb);
 573
 574         return snprintf(page, count, "%u\n",
 575                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 576 }
 577
 578 static int ll_wr_statahead_agl(struct file *file, const char *buffer,
 579                                unsigned long count, void *data)
 580 {
 581         struct super_block *sb = data;
 582         struct ll_sb_info *sbi = ll_s2sbi(sb);
 583         int val, rc;
 584
 585         rc = lprocfs_write_helper(buffer, count, &val);
 586         if (rc)
 587                 return rc;
 588
 589         if (val)
 590                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 591         else
 592                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 593
 594         return count;
 595 }
 596
 597 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 598                                  int count, int *eof, void *data)
 599 {
 600         struct super_block *sb = data;
 601         struct ll_sb_info *sbi = ll_s2sbi(sb);
 602
 603         return snprintf(page, count,
 604                         "statahead total: %u\n"
 605                         "statahead wrong: %u\n"
 606                         "agl total: %u\n",
 607                         atomic_read(&sbi->ll_sa_total),
 608                         atomic_read(&sbi->ll_sa_wrong),
 609                         atomic_read(&sbi->ll_agl_total));
 610 }
 611
 612 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 613                             int count, int *eof, void *data)
 614 {
 615         struct super_block *sb = data;
 616         struct ll_sb_info *sbi = ll_s2sbi(sb);
 617
 618         return snprintf(page, count, "%u\n",
 619                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 620 }
 621
 622 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 623                             unsigned long count, void *data)
 624 {
 625         struct super_block *sb = data;
 626         struct ll_sb_info *sbi = ll_s2sbi(sb);
 627         int val, rc;
 628
 629         rc = lprocfs_write_helper(buffer, count, &val);
 630         if (rc)
 631                 return rc;
 632
 633         if (val)
 634                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 635         else
 636                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 637
 638         return count;
 639 }
 640
 641 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 642         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 643         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 644         { "fstype",       ll_rd_fstype,           0, 0 },
 645         { "site",         ll_rd_site_stats,       0, 0 },
 646         { "blocksize",    ll_rd_blksize,          0, 0 },
 647         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 648         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 649         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 650         { "filestotal",   ll_rd_filestotal,       0, 0 },
 651         { "filesfree",    ll_rd_filesfree,        0, 0 },
 652         { "client_type",  ll_rd_client_type,      0, 0 },
 653         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 654         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 655                                ll_wr_max_readahead_mb, 0 },
 656         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 657                                         ll_wr_max_readahead_per_file_mb, 0 },
 658         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 659                                      ll_wr_max_read_ahead_whole_mb, 0 },
 660         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 661         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 662         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 663         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 664         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 665         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 666         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 667         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 668         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 669         { "lazystatfs",         ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 670         { 0 }
 671 };
 672
 673 #define MAX_STRING_SIZE 128
 674
 675 struct llite_file_opcode {
 676         __u32       opcode;
 677         __u32       type;
 678         const char *opname;
 679 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 680         /* file operation */
 681         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 682         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 683         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 684                                    "writeback_from_writepage" },
 685         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 686                                    "writeback_from_pressure" },
 687         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 688                                    "writeback_ok_pages" },
 689         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 690                                    "writeback_failed_pages" },
 691         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 692                                    "read_bytes" },
 693         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 694                                    "write_bytes" },
 695         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 696                                    "brw_read" },
 697         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 698                                    "brw_write" },
 699         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 700                                    "osc_read" },
 701         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 702                                    "osc_write" },
 703
 704         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 705         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 706         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 707         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 708         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 709         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 710         /* inode operation */
 711         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 712         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 713         { LPROC_LL_LOCKLESS_TRUNC, LPROCFS_TYPE_REGS, "lockless_truncate"},
 714         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 715         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 716         /* special inode operation */
 717         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 718         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 719         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 720         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 721         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 722         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 723         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 724         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 725                                    "direct_read" },
 726         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 727                                    "direct_write" },
 728         { LPROC_LL_LOCKLESS_READ,  LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 729                                    "lockless_read_bytes" },
 730         { LPROC_LL_LOCKLESS_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 731                                    "lockless_write_bytes" },
 732
 733 };
 734
 735 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 736 {
 737         if (!sbi->ll_stats)
 738                 return;
 739         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 740                 lprocfs_counter_add(sbi->ll_stats, op, count);
 741         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 742                  sbi->ll_stats_track_id == current->pid)
 743                 lprocfs_counter_add(sbi->ll_stats, op, count);
 744         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 745                  sbi->ll_stats_track_id == current->parent->pid)
 746                 lprocfs_counter_add(sbi->ll_stats, op, count);
 747         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 748                  sbi->ll_stats_track_id == cfs_curproc_gid())
 749                 lprocfs_counter_add(sbi->ll_stats, op, count);
 750 }
 751 EXPORT_SYMBOL(ll_stats_ops_tally);
 752
 753 static const char *ra_stat_string[] = {
 754         [RA_STAT_HIT] = "hits",
 755         [RA_STAT_MISS] = "misses",
 756         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 757         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 758         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 759         [RA_STAT_FAILED_MATCH] = "failed lock match",
 760         [RA_STAT_DISCARDED] = "read but discarded",
 761         [RA_STAT_ZERO_LEN] = "zero length file",
 762         [RA_STAT_ZERO_WINDOW] = "zero size window",
 763         [RA_STAT_EOF] = "read-ahead to EOF",
 764         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 765         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 766 };
 767
 768
 769 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 770                                 struct super_block *sb, char *osc, char *mdc)
 771 {
 772         struct lprocfs_vars lvars[2];
 773         struct lustre_sb_info *lsi = s2lsi(sb);
 774         struct ll_sb_info *sbi = ll_s2sbi(sb);
 775         struct obd_device *obd;
 776         char name[MAX_STRING_SIZE + 1], *ptr;
 777         int err, id, len, rc;
 778         ENTRY;
 779
 780         memset(lvars, 0, sizeof(lvars));
 781
 782         name[MAX_STRING_SIZE] = '\0';
 783         lvars[0].name = name;
 784
 785         LASSERT(sbi != NULL);
 786         LASSERT(mdc != NULL);
 787         LASSERT(osc != NULL);
 788
 789         /* Get fsname */
 790         len = strlen(lsi->lsi_lmd->lmd_profile);
 791         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 792         if (ptr && (strcmp(ptr, "-client") == 0))
 793                 len -= 7;
 794
 795         /* Mount info */
 796         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 797                  lsi->lsi_lmd->lmd_profile, sb);
 798
 799         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 800         if (IS_ERR(sbi->ll_proc_root)) {
 801                 err = PTR_ERR(sbi->ll_proc_root);
 802                 sbi->ll_proc_root = NULL;
 803                 RETURN(err);
 804         }
 805
 806         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 807                                 &vvp_dump_pgcache_file_ops, sbi);
 808         if (rc)
 809                 CWARN("Error adding the dump_page_cache file\n");
 810
 811         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 812                                 &ll_rw_extents_stats_fops, sbi);
 813         if (rc)
 814                 CWARN("Error adding the extent_stats file\n");
 815
 816         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 817                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 818         if (rc)
 819                 CWARN("Error adding the extents_stats_per_process file\n");
 820
 821         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 822                                 &ll_rw_offset_stats_fops, sbi);
 823         if (rc)
 824                 CWARN("Error adding the offset_stats file\n");
 825
 826         /* File operations stats */
 827         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 828                                             LPROCFS_STATS_FLAG_NONE);
 829         if (sbi->ll_stats == NULL)
 830                 GOTO(out, err = -ENOMEM);
 831         /* do counter init */
 832         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 833                 __u32 type = llite_opcode_table[id].type;
 834                 void *ptr = NULL;
 835                 if (type & LPROCFS_TYPE_REGS)
 836                         ptr = "regs";
 837                 else if (type & LPROCFS_TYPE_BYTES)
 838                         ptr = "bytes";
 839                 else if (type & LPROCFS_TYPE_PAGES)
 840                         ptr = "pages";
 841                 lprocfs_counter_init(sbi->ll_stats,
 842                                      llite_opcode_table[id].opcode,
 843                                      (type & LPROCFS_CNTR_AVGMINMAX),
 844                                      llite_opcode_table[id].opname, ptr);
 845         }
 846         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 847         if (err)
 848                 GOTO(out, err);
 849
 850         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 851                                                LPROCFS_STATS_FLAG_NONE);
 852         if (sbi->ll_ra_stats == NULL)
 853                 GOTO(out, err = -ENOMEM);
 854
 855         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 856                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 857                                      ra_stat_string[id], "pages");
 858         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 859                                      sbi->ll_ra_stats);
 860         if (err)
 861                 GOTO(out, err);
 862
 863
 864         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 865         if (err)
 866                 GOTO(out, err);
 867
 868         /* MDC info */
 869         obd = class_name2obd(mdc);
 870
 871         LASSERT(obd != NULL);
 872         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 873         LASSERT(obd->obd_type->typ_name != NULL);
 874
 875         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 876                  obd->obd_type->typ_name);
 877         lvars[0].read_fptr = lprocfs_rd_name;
 878         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 879         if (err)
 880                 GOTO(out, err);
 881
 882         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 883         lvars[0].read_fptr = lprocfs_rd_uuid;
 884         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 885         if (err)
 886                 GOTO(out, err);
 887
 888         /* OSC */
 889         obd = class_name2obd(osc);
 890
 891         LASSERT(obd != NULL);
 892         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 893         LASSERT(obd->obd_type->typ_name != NULL);
 894
 895         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 896                  obd->obd_type->typ_name);
 897         lvars[0].read_fptr = lprocfs_rd_name;
 898         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 899         if (err)
 900                 GOTO(out, err);
 901
 902         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 903         lvars[0].read_fptr = lprocfs_rd_uuid;
 904         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 905 out:
 906         if (err) {
 907                 lprocfs_remove(&sbi->ll_proc_root);
 908                 lprocfs_free_stats(&sbi->ll_ra_stats);
 909                 lprocfs_free_stats(&sbi->ll_stats);
 910         }
 911         RETURN(err);
 912 }
 913
 914 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 915 {
 916         if (sbi->ll_proc_root) {
 917                 lprocfs_remove(&sbi->ll_proc_root);
 918                 lprocfs_free_stats(&sbi->ll_ra_stats);
 919                 lprocfs_free_stats(&sbi->ll_stats);
 920         }
 921 }
 922 #undef MAX_STRING_SIZE
 923
 924 #define pct(a,b) (b ? a * 100 / b : 0)
 925
 926 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 927                                    struct seq_file *seq, int which)
 928 {
 929         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 930         unsigned long start, end, r, w;
 931         char *unitp = "KMGTPEZY";
 932         int i, units = 10;
 933         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 934
 935         read_cum = 0;
 936         write_cum = 0;
 937         start = 0;
 938
 939         for(i = 0; i < LL_HIST_MAX; i++) {
 940                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 941                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 942         }
 943
 944         for(i = 0; i < LL_HIST_MAX; i++) {
 945                 r = pp_info->pp_r_hist.oh_buckets[i];
 946                 w = pp_info->pp_w_hist.oh_buckets[i];
 947                 read_cum += r;
 948                 write_cum += w;
 949                 end = 1 << (i + LL_HIST_START - units);
 950                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 951                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 952                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 953                            r, pct(r, read_tot), pct(read_cum, read_tot),
 954                            w, pct(w, write_tot), pct(write_cum, write_tot));
 955                 start = end;
 956                 if (start == 1<<10) {
 957                         start = 1;
 958                         units += 10;
 959                         unitp++;
 960                 }
 961                 if (read_cum == read_tot && write_cum == write_tot)
 962                         break;
 963         }
 964 }
 965
 966 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 967 {
 968         struct timeval now;
 969         struct ll_sb_info *sbi = seq->private;
 970         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 971         int k;
 972
 973         cfs_gettimeofday(&now);
 974
 975         if (!sbi->ll_rw_stats_on) {
 976                 seq_printf(seq, "disabled\n"
 977                                 "write anything in this file to activate, "
 978                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 979                 return 0;
 980         }
 981         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 982                    now.tv_sec, now.tv_usec);
 983         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 984         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 985                    "extents", "calls", "%", "cum%",
 986                    "calls", "%", "cum%");
 987         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 988         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
 989                 if(io_extents->pp_extents[k].pid != 0) {
 990                         seq_printf(seq, "\nPID: %d\n",
 991                                    io_extents->pp_extents[k].pid);
 992                         ll_display_extents_info(io_extents, seq, k);
 993                 }
 994         }
 995         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
 996         return 0;
 997 }
 998
 999 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1000                                                 const char *buf, size_t len,
1001                                                 loff_t *off)
1002 {
1003         struct seq_file *seq = file->private_data;
1004         struct ll_sb_info *sbi = seq->private;
1005         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1006         int i;
1007         int value = 1, rc = 0;
1008
1009         rc = lprocfs_write_helper(buf, len, &value);
1010         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1011                        strcmp(buf, "Disabled") == 0))
1012                 value = 0;
1013
1014         if (value == 0)
1015                 sbi->ll_rw_stats_on = 0;
1016         else
1017                 sbi->ll_rw_stats_on = 1;
1018
1019         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1020         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1021                 io_extents->pp_extents[i].pid = 0;
1022                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1023                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1024         }
1025         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1026         return len;
1027 }
1028
1029 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1030
1031 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1032 {
1033         struct timeval now;
1034         struct ll_sb_info *sbi = seq->private;
1035         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1036
1037         cfs_gettimeofday(&now);
1038
1039         if (!sbi->ll_rw_stats_on) {
1040                 seq_printf(seq, "disabled\n"
1041                                 "write anything in this file to activate, "
1042                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1043                 return 0;
1044         }
1045         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1046                    now.tv_sec, now.tv_usec);
1047
1048         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1049         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1050                    "extents", "calls", "%", "cum%",
1051                    "calls", "%", "cum%");
1052         cfs_spin_lock(&sbi->ll_lock);
1053         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1054         cfs_spin_unlock(&sbi->ll_lock);
1055
1056         return 0;
1057 }
1058
1059 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1060                                         size_t len, loff_t *off)
1061 {
1062         struct seq_file *seq = file->private_data;
1063         struct ll_sb_info *sbi = seq->private;
1064         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1065         int i;
1066         int value = 1, rc = 0;
1067
1068         rc = lprocfs_write_helper(buf, len, &value);
1069         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1070                        strcmp(buf, "Disabled") == 0))
1071                 value = 0;
1072
1073         if (value == 0)
1074                 sbi->ll_rw_stats_on = 0;
1075         else
1076                 sbi->ll_rw_stats_on = 1;
1077         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1078         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1079         {
1080                 io_extents->pp_extents[i].pid = 0;
1081                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1082                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1083         }
1084         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1085
1086         return len;
1087 }
1088
1089 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1090
1091 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1092                        struct ll_file_data *file, loff_t pos,
1093                        size_t count, int rw)
1094 {
1095         int i, cur = -1;
1096         struct ll_rw_process_info *process;
1097         struct ll_rw_process_info *offset;
1098         int *off_count = &sbi->ll_rw_offset_entry_count;
1099         int *process_count = &sbi->ll_offset_process_count;
1100         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1101
1102         if(!sbi->ll_rw_stats_on)
1103                 return;
1104         process = sbi->ll_rw_process_info;
1105         offset = sbi->ll_rw_offset_info;
1106
1107         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1108         /* Extent statistics */
1109         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1110                 if(io_extents->pp_extents[i].pid == pid) {
1111                         cur = i;
1112                         break;
1113                 }
1114         }
1115
1116         if (cur == -1) {
1117                 /* new process */
1118                 sbi->ll_extent_process_count =
1119                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1120                 cur = sbi->ll_extent_process_count;
1121                 io_extents->pp_extents[cur].pid = pid;
1122                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1123                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1124         }
1125
1126         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1127              (i < (LL_HIST_MAX - 1)); i++);
1128         if (rw == 0) {
1129                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1130                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1131         } else {
1132                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1133                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1134         }
1135         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1136
1137         cfs_spin_lock(&sbi->ll_process_lock);
1138         /* Offset statistics */
1139         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1140                 if (process[i].rw_pid == pid) {
1141                         if (process[i].rw_last_file != file) {
1142                                 process[i].rw_range_start = pos;
1143                                 process[i].rw_last_file_pos = pos + count;
1144                                 process[i].rw_smallest_extent = count;
1145                                 process[i].rw_largest_extent = count;
1146                                 process[i].rw_offset = 0;
1147                                 process[i].rw_last_file = file;
1148                                 cfs_spin_unlock(&sbi->ll_process_lock);
1149                                 return;
1150                         }
1151                         if (process[i].rw_last_file_pos != pos) {
1152                                 *off_count =
1153                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1154                                 offset[*off_count].rw_op = process[i].rw_op;
1155                                 offset[*off_count].rw_pid = pid;
1156                                 offset[*off_count].rw_range_start =
1157                                         process[i].rw_range_start;
1158                                 offset[*off_count].rw_range_end =
1159                                         process[i].rw_last_file_pos;
1160                                 offset[*off_count].rw_smallest_extent =
1161                                         process[i].rw_smallest_extent;
1162                                 offset[*off_count].rw_largest_extent =
1163                                         process[i].rw_largest_extent;
1164                                 offset[*off_count].rw_offset =
1165                                         process[i].rw_offset;
1166                                 process[i].rw_op = rw;
1167                                 process[i].rw_range_start = pos;
1168                                 process[i].rw_smallest_extent = count;
1169                                 process[i].rw_largest_extent = count;
1170                                 process[i].rw_offset = pos -
1171                                         process[i].rw_last_file_pos;
1172                         }
1173                         if(process[i].rw_smallest_extent > count)
1174                                 process[i].rw_smallest_extent = count;
1175                         if(process[i].rw_largest_extent < count)
1176                                 process[i].rw_largest_extent = count;
1177                         process[i].rw_last_file_pos = pos + count;
1178                         cfs_spin_unlock(&sbi->ll_process_lock);
1179                         return;
1180                 }
1181         }
1182         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1183         process[*process_count].rw_pid = pid;
1184         process[*process_count].rw_op = rw;
1185         process[*process_count].rw_range_start = pos;
1186         process[*process_count].rw_last_file_pos = pos + count;
1187         process[*process_count].rw_smallest_extent = count;
1188         process[*process_count].rw_largest_extent = count;
1189         process[*process_count].rw_offset = 0;
1190         process[*process_count].rw_last_file = file;
1191         cfs_spin_unlock(&sbi->ll_process_lock);
1192 }
1193
1194 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1195 {
1196         struct timeval now;
1197         struct ll_sb_info *sbi = seq->private;
1198         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1199         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1200         int i;
1201
1202         cfs_gettimeofday(&now);
1203
1204         if (!sbi->ll_rw_stats_on) {
1205                 seq_printf(seq, "disabled\n"
1206                                 "write anything in this file to activate, "
1207                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1208                 return 0;
1209         }
1210         cfs_spin_lock(&sbi->ll_process_lock);
1211
1212         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1213                    now.tv_sec, now.tv_usec);
1214         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1215                    "R/W", "PID", "RANGE START", "RANGE END",
1216                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1217         /* We stored the discontiguous offsets here; print them first */
1218         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1219                 if (offset[i].rw_pid != 0)
1220                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1221                                    offset[i].rw_op ? 'W' : 'R',
1222                                    offset[i].rw_pid,
1223                                    offset[i].rw_range_start,
1224                                    offset[i].rw_range_end,
1225                                    (unsigned long)offset[i].rw_smallest_extent,
1226                                    (unsigned long)offset[i].rw_largest_extent,
1227                                    offset[i].rw_offset);
1228         }
1229         /* Then print the current offsets for each process */
1230         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1231                 if (process[i].rw_pid != 0)
1232                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1233                                    process[i].rw_op ? 'W' : 'R',
1234                                    process[i].rw_pid,
1235                                    process[i].rw_range_start,
1236                                    process[i].rw_last_file_pos,
1237                                    (unsigned long)process[i].rw_smallest_extent,
1238                                    (unsigned long)process[i].rw_largest_extent,
1239                                    process[i].rw_offset);
1240         }
1241         cfs_spin_unlock(&sbi->ll_process_lock);
1242
1243         return 0;
1244 }
1245
1246 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1247                                        size_t len, loff_t *off)
1248 {
1249         struct seq_file *seq = file->private_data;
1250         struct ll_sb_info *sbi = seq->private;
1251         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1252         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1253         int value = 1, rc = 0;
1254
1255         rc = lprocfs_write_helper(buf, len, &value);
1256
1257         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1258                            strcmp(buf, "Disabled") == 0))
1259                 value = 0;
1260
1261         if (value == 0)
1262                 sbi->ll_rw_stats_on = 0;
1263         else
1264                 sbi->ll_rw_stats_on = 1;
1265
1266         cfs_spin_lock(&sbi->ll_process_lock);
1267         sbi->ll_offset_process_count = 0;
1268         sbi->ll_rw_offset_entry_count = 0;
1269         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1270                LL_PROCESS_HIST_MAX);
1271         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1272                LL_OFFSET_HIST_MAX);
1273         cfs_spin_unlock(&sbi->ll_process_lock);
1274
1275         return len;
1276 }
1277
1278 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1279
1280 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1281 {
1282     lvars->module_vars  = NULL;
1283     lvars->obd_vars     = lprocfs_llite_obd_vars;
1284 }
1285 #endif /* LPROCFS */