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  * Copyright (c) 2012, Whamcloud, Inc.
  33  */
  34 /*
  35  * This file is part of Lustre, http://www.lustre.org/
  36  * Lustre is a trademark of Sun Microsystems, Inc.
  37  */
  38 #define DEBUG_SUBSYSTEM S_LLITE
  39
  40 #include <linux/version.h>
  41 #include <lustre_lite.h>
  42 #include <lprocfs_status.h>
  43 #include <linux/seq_file.h>
  44 #include <obd_support.h>
  45
  46 #include "llite_internal.h"
  47
  48 struct proc_dir_entry *proc_lustre_fs_root;
  49
  50 #ifdef LPROCFS
  51 /* /proc/lustre/llite mount point registration */
  52 extern struct file_operations vvp_dump_pgcache_file_ops;
  53 struct file_operations ll_rw_extents_stats_fops;
  54 struct file_operations ll_rw_extents_stats_pp_fops;
  55 struct file_operations ll_rw_offset_stats_fops;
  56
  57 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  58                          int *eof, void *data)
  59 {
  60         struct super_block *sb = (struct super_block *)data;
  61         struct obd_statfs osfs;
  62         int rc;
  63
  64         LASSERT(sb != NULL);
  65         rc = ll_statfs_internal(sb, &osfs,
  66                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  67                                 OBD_STATFS_NODELAY);
  68         if (!rc) {
  69               *eof = 1;
  70               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  71         }
  72
  73         return rc;
  74 }
  75
  76 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  77                              int *eof, void *data)
  78 {
  79         struct super_block *sb = (struct super_block *)data;
  80         struct obd_statfs osfs;
  81         int rc;
  82
  83         LASSERT(sb != NULL);
  84         rc = ll_statfs_internal(sb, &osfs,
  85                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  86                                 OBD_STATFS_NODELAY);
  87         if (!rc) {
  88                 __u32 blk_size = osfs.os_bsize >> 10;
  89                 __u64 result = osfs.os_blocks;
  90
  91                 while (blk_size >>= 1)
  92                         result <<= 1;
  93
  94                 *eof = 1;
  95                 rc = snprintf(page, count, LPU64"\n", result);
  96         }
  97         return rc;
  98
  99 }
 100
 101 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
 102                             int *eof, void *data)
 103 {
 104         struct super_block *sb = (struct super_block *)data;
 105         struct obd_statfs osfs;
 106         int rc;
 107
 108         LASSERT(sb != NULL);
 109         rc = ll_statfs_internal(sb, &osfs,
 110                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 111                                 OBD_STATFS_NODELAY);
 112         if (!rc) {
 113                 __u32 blk_size = osfs.os_bsize >> 10;
 114                 __u64 result = osfs.os_bfree;
 115
 116                 while (blk_size >>= 1)
 117                         result <<= 1;
 118
 119                 *eof = 1;
 120                 rc = snprintf(page, count, LPU64"\n", result);
 121         }
 122         return rc;
 123 }
 124
 125 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 126                              int *eof, void *data)
 127 {
 128         struct super_block *sb = (struct super_block *)data;
 129         struct obd_statfs osfs;
 130         int rc;
 131
 132         LASSERT(sb != NULL);
 133         rc = ll_statfs_internal(sb, &osfs,
 134                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 135                                 OBD_STATFS_NODELAY);
 136         if (!rc) {
 137                 __u32 blk_size = osfs.os_bsize >> 10;
 138                 __u64 result = osfs.os_bavail;
 139
 140                 while (blk_size >>= 1)
 141                         result <<= 1;
 142
 143                 *eof = 1;
 144                 rc = snprintf(page, count, LPU64"\n", result);
 145         }
 146         return rc;
 147 }
 148
 149 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 150                             int *eof, void *data)
 151 {
 152         struct super_block *sb = (struct super_block *)data;
 153         struct obd_statfs osfs;
 154         int rc;
 155
 156         LASSERT(sb != NULL);
 157         rc = ll_statfs_internal(sb, &osfs,
 158                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 159                                 OBD_STATFS_NODELAY);
 160         if (!rc) {
 161                  *eof = 1;
 162                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 163         }
 164         return rc;
 165 }
 166
 167 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 168                            int *eof, void *data)
 169 {
 170         struct super_block *sb = (struct super_block *)data;
 171         struct obd_statfs osfs;
 172         int rc;
 173
 174         LASSERT(sb != NULL);
 175         rc = ll_statfs_internal(sb, &osfs,
 176                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 177                                 OBD_STATFS_NODELAY);
 178         if (!rc) {
 179                  *eof = 1;
 180                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 181         }
 182         return rc;
 183
 184 }
 185
 186 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 187                             int *eof, void *data)
 188 {
 189         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 190         int rc;
 191
 192         LASSERT(sbi != NULL);
 193
 194         *eof = 1;
 195         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 196                 rc = snprintf(page, count, "remote client\n");
 197         else
 198                 rc = snprintf(page, count, "local client\n");
 199
 200         return rc;
 201 }
 202
 203 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 204                         int *eof, void *data)
 205 {
 206         struct super_block *sb = (struct super_block*)data;
 207
 208         LASSERT(sb != NULL);
 209         *eof = 1;
 210         return snprintf(page, count, "%s\n", sb->s_type->name);
 211 }
 212
 213 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 214                          int *eof, void *data)
 215 {
 216         struct super_block *sb = (struct super_block *)data;
 217
 218         LASSERT(sb != NULL);
 219         *eof = 1;
 220         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 221 }
 222
 223 static int ll_rd_site_stats(char *page, char **start, off_t off,
 224                             int count, int *eof, void *data)
 225 {
 226         struct super_block *sb = data;
 227
 228         /*
 229          * See description of statistical counters in struct cl_site, and
 230          * struct lu_site.
 231          */
 232         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 233                                    page, count);
 234 }
 235
 236 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 237                                    int count, int *eof, void *data)
 238 {
 239         struct super_block *sb = data;
 240         struct ll_sb_info *sbi = ll_s2sbi(sb);
 241         long pages_number;
 242         int mult;
 243
 244         cfs_spin_lock(&sbi->ll_lock);
 245         pages_number = sbi->ll_ra_info.ra_max_pages;
 246         cfs_spin_unlock(&sbi->ll_lock);
 247
 248         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 249         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 250 }
 251
 252 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 253                                   unsigned long count, void *data)
 254 {
 255         struct super_block *sb = data;
 256         struct ll_sb_info *sbi = ll_s2sbi(sb);
 257         int mult, rc, pages_number;
 258
 259         mult = 1 << (20 - CFS_PAGE_SHIFT);
 260         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 261         if (rc)
 262                 return rc;
 263
 264         if (pages_number < 0 || pages_number > cfs_num_physpages / 2) {
 265                 CERROR("can't set file readahead more than %lu MB\n",
 266                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 267                 return -ERANGE;
 268         }
 269
 270         cfs_spin_lock(&sbi->ll_lock);
 271         sbi->ll_ra_info.ra_max_pages = pages_number;
 272         cfs_spin_unlock(&sbi->ll_lock);
 273
 274         return count;
 275 }
 276
 277 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 278                                            int count, int *eof, void *data)
 279 {
 280         struct super_block *sb = data;
 281         struct ll_sb_info *sbi = ll_s2sbi(sb);
 282         long pages_number;
 283         int mult;
 284
 285         cfs_spin_lock(&sbi->ll_lock);
 286         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 287         cfs_spin_unlock(&sbi->ll_lock);
 288
 289         mult = 1 << (20 - CFS_PAGE_SHIFT);
 290         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 291 }
 292
 293 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 294                                           unsigned long count, void *data)
 295 {
 296         struct super_block *sb = data;
 297         struct ll_sb_info *sbi = ll_s2sbi(sb);
 298         int mult, rc, pages_number;
 299
 300         mult = 1 << (20 - CFS_PAGE_SHIFT);
 301         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 302         if (rc)
 303                 return rc;
 304
 305         if (pages_number < 0 ||
 306                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 307                 CERROR("can't set file readahead more than"
 308                        "max_read_ahead_mb %lu MB\n",
 309                        sbi->ll_ra_info.ra_max_pages);
 310                 return -ERANGE;
 311         }
 312
 313         cfs_spin_lock(&sbi->ll_lock);
 314         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 315         cfs_spin_unlock(&sbi->ll_lock);
 316
 317         return count;
 318 }
 319
 320 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 321                                          int count, int *eof, void *data)
 322 {
 323         struct super_block *sb = data;
 324         struct ll_sb_info *sbi = ll_s2sbi(sb);
 325         long pages_number;
 326         int mult;
 327
 328         cfs_spin_lock(&sbi->ll_lock);
 329         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 330         cfs_spin_unlock(&sbi->ll_lock);
 331
 332         mult = 1 << (20 - CFS_PAGE_SHIFT);
 333         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 334 }
 335
 336 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 337                                          unsigned long count, void *data)
 338 {
 339         struct super_block *sb = data;
 340         struct ll_sb_info *sbi = ll_s2sbi(sb);
 341         int mult, rc, pages_number;
 342
 343         mult = 1 << (20 - CFS_PAGE_SHIFT);
 344         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 345         if (rc)
 346                 return rc;
 347
 348         /* Cap this at the current max readahead window size, the readahead
 349          * algorithm does this anyway so it's pointless to set it larger. */
 350         if (pages_number < 0 ||
 351             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 352                 CERROR("can't set max_read_ahead_whole_mb more than "
 353                        "max_read_ahead_per_file_mb: %lu\n",
 354                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
 355                 return -ERANGE;
 356         }
 357
 358         cfs_spin_lock(&sbi->ll_lock);
 359         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 360         cfs_spin_unlock(&sbi->ll_lock);
 361
 362         return count;
 363 }
 364
 365 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 366                                int count, int *eof, void *data)
 367 {
 368         struct super_block *sb = data;
 369         struct ll_sb_info *sbi = ll_s2sbi(sb);
 370         long pages_number;
 371         int mult;
 372
 373         cfs_spin_lock(&sbi->ll_lock);
 374         pages_number = sbi->ll_async_page_max;
 375         cfs_spin_unlock(&sbi->ll_lock);
 376
 377         mult = 1 << (20 - CFS_PAGE_SHIFT);
 378         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 379 }
 380
 381 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 382                                unsigned long count, void *data)
 383 {
 384         struct super_block *sb = data;
 385         struct ll_sb_info *sbi = ll_s2sbi(sb);
 386         int mult, rc, pages_number;
 387
 388         mult = 1 << (20 - CFS_PAGE_SHIFT);
 389         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 390         if (rc)
 391                 return rc;
 392
 393         if (pages_number < 0 || pages_number > cfs_num_physpages) {
 394                 CERROR("can't set max cache more than %lu MB\n",
 395                         cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 396                 return -ERANGE;
 397         }
 398
 399         cfs_spin_lock(&sbi->ll_lock);
 400         sbi->ll_async_page_max = pages_number ;
 401         cfs_spin_unlock(&sbi->ll_lock);
 402
 403         if (!sbi->ll_dt_exp)
 404                 /* Not set up yet, don't call llap_shrink_cache */
 405                 return count;
 406
 407         return count;
 408 }
 409
 410 static int ll_rd_checksum(char *page, char **start, off_t off,
 411                           int count, int *eof, void *data)
 412 {
 413         struct super_block *sb = data;
 414         struct ll_sb_info *sbi = ll_s2sbi(sb);
 415
 416         return snprintf(page, count, "%u\n",
 417                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 418 }
 419
 420 static int ll_wr_checksum(struct file *file, const char *buffer,
 421                           unsigned long count, void *data)
 422 {
 423         struct super_block *sb = data;
 424         struct ll_sb_info *sbi = ll_s2sbi(sb);
 425         int val, rc;
 426
 427         if (!sbi->ll_dt_exp)
 428                 /* Not set up yet */
 429                 return -EAGAIN;
 430
 431         rc = lprocfs_write_helper(buffer, count, &val);
 432         if (rc)
 433                 return rc;
 434         if (val)
 435                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 436         else
 437                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 438
 439         rc = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 440                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 441         if (rc)
 442                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 443
 444         return count;
 445 }
 446
 447 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 448                           int count, int *eof, void *data)
 449 {
 450         struct super_block *sb = data;
 451
 452         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 453 }
 454
 455 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 456                           unsigned long count, void *data)
 457 {
 458         struct super_block *sb = data;
 459         int rc, val;
 460
 461         rc = lprocfs_write_helper(buffer, count, &val);
 462         if (rc)
 463                 return rc;
 464         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 465         return count;
 466 }
 467
 468 static int ll_rd_track_id(char *page, int count, void *data,
 469                           enum stats_track_type type)
 470 {
 471         struct super_block *sb = data;
 472
 473         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 474                 return snprintf(page, count, "%d\n",
 475                                 ll_s2sbi(sb)->ll_stats_track_id);
 476
 477         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 478                 return snprintf(page, count, "0 (all)\n");
 479         } else {
 480                 return snprintf(page, count, "untracked\n");
 481         }
 482 }
 483
 484 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 485                           enum stats_track_type type)
 486 {
 487         struct super_block *sb = data;
 488         int rc, pid;
 489
 490         rc = lprocfs_write_helper(buffer, count, &pid);
 491         if (rc)
 492                 return rc;
 493         ll_s2sbi(sb)->ll_stats_track_id = pid;
 494         if (pid == 0)
 495                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 496         else
 497                 ll_s2sbi(sb)->ll_stats_track_type = type;
 498         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 499         return count;
 500 }
 501
 502 static int ll_rd_track_pid(char *page, char **start, off_t off,
 503                           int count, int *eof, void *data)
 504 {
 505         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 506 }
 507
 508 static int ll_wr_track_pid(struct file *file, const char *buffer,
 509                           unsigned long count, void *data)
 510 {
 511         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 512 }
 513
 514 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 515                           int count, int *eof, void *data)
 516 {
 517         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 518 }
 519
 520 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 521                           unsigned long count, void *data)
 522 {
 523         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 524 }
 525
 526 static int ll_rd_track_gid(char *page, char **start, off_t off,
 527                           int count, int *eof, void *data)
 528 {
 529         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 530 }
 531
 532 static int ll_wr_track_gid(struct file *file, const char *buffer,
 533                           unsigned long count, void *data)
 534 {
 535         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 536 }
 537
 538 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 539                                int count, int *eof, void *data)
 540 {
 541         struct super_block *sb = data;
 542         struct ll_sb_info *sbi = ll_s2sbi(sb);
 543
 544         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 545 }
 546
 547 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 548                                unsigned long count, void *data)
 549 {
 550         struct super_block *sb = data;
 551         struct ll_sb_info *sbi = ll_s2sbi(sb);
 552         int val, rc;
 553
 554         rc = lprocfs_write_helper(buffer, count, &val);
 555         if (rc)
 556                 return rc;
 557
 558         if (val >= 0 && val <= LL_SA_RPC_MAX)
 559                 sbi->ll_sa_max = val;
 560         else
 561                 CERROR("Bad statahead_max value %d. Valid values are in the "
 562                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 563
 564         return count;
 565 }
 566
 567 static int ll_rd_statahead_agl(char *page, char **start, off_t off,
 568                                int count, int *eof, void *data)
 569 {
 570         struct super_block *sb = data;
 571         struct ll_sb_info *sbi = ll_s2sbi(sb);
 572
 573         return snprintf(page, count, "%u\n",
 574                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 575 }
 576
 577 static int ll_wr_statahead_agl(struct file *file, const char *buffer,
 578                                unsigned long count, void *data)
 579 {
 580         struct super_block *sb = data;
 581         struct ll_sb_info *sbi = ll_s2sbi(sb);
 582         int val, rc;
 583
 584         rc = lprocfs_write_helper(buffer, count, &val);
 585         if (rc)
 586                 return rc;
 587
 588         if (val)
 589                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 590         else
 591                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 592
 593         return count;
 594 }
 595
 596 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 597                                  int count, int *eof, void *data)
 598 {
 599         struct super_block *sb = data;
 600         struct ll_sb_info *sbi = ll_s2sbi(sb);
 601
 602         return snprintf(page, count,
 603                         "statahead total: %u\n"
 604                         "statahead wrong: %u\n"
 605                         "agl total: %u\n",
 606                         atomic_read(&sbi->ll_sa_total),
 607                         atomic_read(&sbi->ll_sa_wrong),
 608                         atomic_read(&sbi->ll_agl_total));
 609 }
 610
 611 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 612                             int count, int *eof, void *data)
 613 {
 614         struct super_block *sb = data;
 615         struct ll_sb_info *sbi = ll_s2sbi(sb);
 616
 617         return snprintf(page, count, "%u\n",
 618                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 619 }
 620
 621 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 622                             unsigned long count, void *data)
 623 {
 624         struct super_block *sb = data;
 625         struct ll_sb_info *sbi = ll_s2sbi(sb);
 626         int val, rc;
 627
 628         rc = lprocfs_write_helper(buffer, count, &val);
 629         if (rc)
 630                 return rc;
 631
 632         if (val)
 633                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 634         else
 635                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 636
 637         return count;
 638 }
 639
 640 static int ll_rd_maxea_size(char *page, char **start, off_t off,
 641                             int count, int *eof, void *data)
 642 {
 643         struct super_block *sb = data;
 644         struct ll_sb_info *sbi = ll_s2sbi(sb);
 645         unsigned int ealen;
 646         int rc;
 647
 648         rc = ll_get_max_mdsize(sbi, &ealen);
 649         if (rc)
 650                 return rc;
 651
 652         return snprintf(page, count, "%u\n", ealen);
 653 }
 654
 655 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 656         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 657         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 658         { "fstype",       ll_rd_fstype,           0, 0 },
 659         { "site",         ll_rd_site_stats,       0, 0 },
 660         { "blocksize",    ll_rd_blksize,          0, 0 },
 661         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 662         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 663         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 664         { "filestotal",   ll_rd_filestotal,       0, 0 },
 665         { "filesfree",    ll_rd_filesfree,        0, 0 },
 666         { "client_type",  ll_rd_client_type,      0, 0 },
 667         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 668         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 669                                ll_wr_max_readahead_mb, 0 },
 670         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 671                                         ll_wr_max_readahead_per_file_mb, 0 },
 672         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 673                                      ll_wr_max_read_ahead_whole_mb, 0 },
 674         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 675         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 676         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 677         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 678         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 679         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 680         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 681         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 682         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 683         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 684         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 685         { 0 }
 686 };
 687
 688 #define MAX_STRING_SIZE 128
 689
 690 struct llite_file_opcode {
 691         __u32       opcode;
 692         __u32       type;
 693         const char *opname;
 694 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 695         /* file operation */
 696         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 697         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 698         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 699                                    "read_bytes" },
 700         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 701                                    "write_bytes" },
 702         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 703                                    "brw_read" },
 704         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 705                                    "brw_write" },
 706         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 707                                    "osc_read" },
 708         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 709                                    "osc_write" },
 710         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 711         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 712         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 713         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 714         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 715         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 716         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 717         /* inode operation */
 718         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 719         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 720         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 721         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 722         /* dir inode operation */
 723         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 724         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 725         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 726         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 727         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 728         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 729         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 730         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 731         /* special inode operation */
 732         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 733         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 734         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 735         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 736         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 737         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 738         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 739 };
 740
 741 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 742 {
 743         if (!sbi->ll_stats)
 744                 return;
 745         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 746                 lprocfs_counter_add(sbi->ll_stats, op, count);
 747         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 748                  sbi->ll_stats_track_id == current->pid)
 749                 lprocfs_counter_add(sbi->ll_stats, op, count);
 750         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 751                  sbi->ll_stats_track_id == current->parent->pid)
 752                 lprocfs_counter_add(sbi->ll_stats, op, count);
 753         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 754                  sbi->ll_stats_track_id == cfs_curproc_gid())
 755                 lprocfs_counter_add(sbi->ll_stats, op, count);
 756 }
 757 EXPORT_SYMBOL(ll_stats_ops_tally);
 758
 759 static const char *ra_stat_string[] = {
 760         [RA_STAT_HIT] = "hits",
 761         [RA_STAT_MISS] = "misses",
 762         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 763         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 764         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 765         [RA_STAT_FAILED_MATCH] = "failed lock match",
 766         [RA_STAT_DISCARDED] = "read but discarded",
 767         [RA_STAT_ZERO_LEN] = "zero length file",
 768         [RA_STAT_ZERO_WINDOW] = "zero size window",
 769         [RA_STAT_EOF] = "read-ahead to EOF",
 770         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 771         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 772 };
 773
 774
 775 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 776                                 struct super_block *sb, char *osc, char *mdc)
 777 {
 778         struct lprocfs_vars lvars[2];
 779         struct lustre_sb_info *lsi = s2lsi(sb);
 780         struct ll_sb_info *sbi = ll_s2sbi(sb);
 781         struct obd_device *obd;
 782         char name[MAX_STRING_SIZE + 1], *ptr;
 783         int err, id, len, rc;
 784         ENTRY;
 785
 786         memset(lvars, 0, sizeof(lvars));
 787
 788         name[MAX_STRING_SIZE] = '\0';
 789         lvars[0].name = name;
 790
 791         LASSERT(sbi != NULL);
 792         LASSERT(mdc != NULL);
 793         LASSERT(osc != NULL);
 794
 795         /* Get fsname */
 796         len = strlen(lsi->lsi_lmd->lmd_profile);
 797         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 798         if (ptr && (strcmp(ptr, "-client") == 0))
 799                 len -= 7;
 800
 801         /* Mount info */
 802         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 803                  lsi->lsi_lmd->lmd_profile, sb);
 804
 805         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 806         if (IS_ERR(sbi->ll_proc_root)) {
 807                 err = PTR_ERR(sbi->ll_proc_root);
 808                 sbi->ll_proc_root = NULL;
 809                 RETURN(err);
 810         }
 811
 812         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 813                                 &vvp_dump_pgcache_file_ops, sbi);
 814         if (rc)
 815                 CWARN("Error adding the dump_page_cache file\n");
 816
 817         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 818                                 &ll_rw_extents_stats_fops, sbi);
 819         if (rc)
 820                 CWARN("Error adding the extent_stats file\n");
 821
 822         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 823                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 824         if (rc)
 825                 CWARN("Error adding the extents_stats_per_process file\n");
 826
 827         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 828                                 &ll_rw_offset_stats_fops, sbi);
 829         if (rc)
 830                 CWARN("Error adding the offset_stats file\n");
 831
 832         /* File operations stats */
 833         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 834                                             LPROCFS_STATS_FLAG_NONE);
 835         if (sbi->ll_stats == NULL)
 836                 GOTO(out, err = -ENOMEM);
 837         /* do counter init */
 838         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 839                 __u32 type = llite_opcode_table[id].type;
 840                 void *ptr = NULL;
 841                 if (type & LPROCFS_TYPE_REGS)
 842                         ptr = "regs";
 843                 else if (type & LPROCFS_TYPE_BYTES)
 844                         ptr = "bytes";
 845                 else if (type & LPROCFS_TYPE_PAGES)
 846                         ptr = "pages";
 847                 lprocfs_counter_init(sbi->ll_stats,
 848                                      llite_opcode_table[id].opcode,
 849                                      (type & LPROCFS_CNTR_AVGMINMAX),
 850                                      llite_opcode_table[id].opname, ptr);
 851         }
 852         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 853         if (err)
 854                 GOTO(out, err);
 855
 856         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 857                                                LPROCFS_STATS_FLAG_NONE);
 858         if (sbi->ll_ra_stats == NULL)
 859                 GOTO(out, err = -ENOMEM);
 860
 861         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 862                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 863                                      ra_stat_string[id], "pages");
 864         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 865                                      sbi->ll_ra_stats);
 866         if (err)
 867                 GOTO(out, err);
 868
 869
 870         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 871         if (err)
 872                 GOTO(out, err);
 873
 874         /* MDC info */
 875         obd = class_name2obd(mdc);
 876
 877         LASSERT(obd != NULL);
 878         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 879         LASSERT(obd->obd_type->typ_name != NULL);
 880
 881         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 882                  obd->obd_type->typ_name);
 883         lvars[0].read_fptr = lprocfs_rd_name;
 884         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 885         if (err)
 886                 GOTO(out, err);
 887
 888         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 889         lvars[0].read_fptr = lprocfs_rd_uuid;
 890         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 891         if (err)
 892                 GOTO(out, err);
 893
 894         /* OSC */
 895         obd = class_name2obd(osc);
 896
 897         LASSERT(obd != NULL);
 898         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 899         LASSERT(obd->obd_type->typ_name != NULL);
 900
 901         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 902                  obd->obd_type->typ_name);
 903         lvars[0].read_fptr = lprocfs_rd_name;
 904         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 905         if (err)
 906                 GOTO(out, err);
 907
 908         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 909         lvars[0].read_fptr = lprocfs_rd_uuid;
 910         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 911 out:
 912         if (err) {
 913                 lprocfs_remove(&sbi->ll_proc_root);
 914                 lprocfs_free_stats(&sbi->ll_ra_stats);
 915                 lprocfs_free_stats(&sbi->ll_stats);
 916         }
 917         RETURN(err);
 918 }
 919
 920 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 921 {
 922         if (sbi->ll_proc_root) {
 923                 lprocfs_remove(&sbi->ll_proc_root);
 924                 lprocfs_free_stats(&sbi->ll_ra_stats);
 925                 lprocfs_free_stats(&sbi->ll_stats);
 926         }
 927 }
 928 #undef MAX_STRING_SIZE
 929
 930 #define pct(a,b) (b ? a * 100 / b : 0)
 931
 932 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 933                                    struct seq_file *seq, int which)
 934 {
 935         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 936         unsigned long start, end, r, w;
 937         char *unitp = "KMGTPEZY";
 938         int i, units = 10;
 939         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 940
 941         read_cum = 0;
 942         write_cum = 0;
 943         start = 0;
 944
 945         for(i = 0; i < LL_HIST_MAX; i++) {
 946                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 947                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 948         }
 949
 950         for(i = 0; i < LL_HIST_MAX; i++) {
 951                 r = pp_info->pp_r_hist.oh_buckets[i];
 952                 w = pp_info->pp_w_hist.oh_buckets[i];
 953                 read_cum += r;
 954                 write_cum += w;
 955                 end = 1 << (i + LL_HIST_START - units);
 956                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 957                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 958                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 959                            r, pct(r, read_tot), pct(read_cum, read_tot),
 960                            w, pct(w, write_tot), pct(write_cum, write_tot));
 961                 start = end;
 962                 if (start == 1<<10) {
 963                         start = 1;
 964                         units += 10;
 965                         unitp++;
 966                 }
 967                 if (read_cum == read_tot && write_cum == write_tot)
 968                         break;
 969         }
 970 }
 971
 972 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 973 {
 974         struct timeval now;
 975         struct ll_sb_info *sbi = seq->private;
 976         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 977         int k;
 978
 979         cfs_gettimeofday(&now);
 980
 981         if (!sbi->ll_rw_stats_on) {
 982                 seq_printf(seq, "disabled\n"
 983                                 "write anything in this file to activate, "
 984                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 985                 return 0;
 986         }
 987         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 988                    now.tv_sec, now.tv_usec);
 989         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 990         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 991                    "extents", "calls", "%", "cum%",
 992                    "calls", "%", "cum%");
 993         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 994         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
 995                 if(io_extents->pp_extents[k].pid != 0) {
 996                         seq_printf(seq, "\nPID: %d\n",
 997                                    io_extents->pp_extents[k].pid);
 998                         ll_display_extents_info(io_extents, seq, k);
 999                 }
1000         }
1001         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1002         return 0;
1003 }
1004
1005 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1006                                                 const char *buf, size_t len,
1007                                                 loff_t *off)
1008 {
1009         struct seq_file *seq = file->private_data;
1010         struct ll_sb_info *sbi = seq->private;
1011         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1012         int i;
1013         int value = 1, rc = 0;
1014
1015         rc = lprocfs_write_helper(buf, len, &value);
1016         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1017                        strcmp(buf, "Disabled") == 0))
1018                 value = 0;
1019
1020         if (value == 0)
1021                 sbi->ll_rw_stats_on = 0;
1022         else
1023                 sbi->ll_rw_stats_on = 1;
1024
1025         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1026         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1027                 io_extents->pp_extents[i].pid = 0;
1028                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1029                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1030         }
1031         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1032         return len;
1033 }
1034
1035 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1036
1037 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1038 {
1039         struct timeval now;
1040         struct ll_sb_info *sbi = seq->private;
1041         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1042
1043         cfs_gettimeofday(&now);
1044
1045         if (!sbi->ll_rw_stats_on) {
1046                 seq_printf(seq, "disabled\n"
1047                                 "write anything in this file to activate, "
1048                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1049                 return 0;
1050         }
1051         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1052                    now.tv_sec, now.tv_usec);
1053
1054         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1055         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1056                    "extents", "calls", "%", "cum%",
1057                    "calls", "%", "cum%");
1058         cfs_spin_lock(&sbi->ll_lock);
1059         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1060         cfs_spin_unlock(&sbi->ll_lock);
1061
1062         return 0;
1063 }
1064
1065 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1066                                         size_t len, loff_t *off)
1067 {
1068         struct seq_file *seq = file->private_data;
1069         struct ll_sb_info *sbi = seq->private;
1070         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1071         int i;
1072         int value = 1, rc = 0;
1073
1074         rc = lprocfs_write_helper(buf, len, &value);
1075         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1076                        strcmp(buf, "Disabled") == 0))
1077                 value = 0;
1078
1079         if (value == 0)
1080                 sbi->ll_rw_stats_on = 0;
1081         else
1082                 sbi->ll_rw_stats_on = 1;
1083         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1084         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1085         {
1086                 io_extents->pp_extents[i].pid = 0;
1087                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1088                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1089         }
1090         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1091
1092         return len;
1093 }
1094
1095 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1096
1097 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1098                        struct ll_file_data *file, loff_t pos,
1099                        size_t count, int rw)
1100 {
1101         int i, cur = -1;
1102         struct ll_rw_process_info *process;
1103         struct ll_rw_process_info *offset;
1104         int *off_count = &sbi->ll_rw_offset_entry_count;
1105         int *process_count = &sbi->ll_offset_process_count;
1106         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1107
1108         if(!sbi->ll_rw_stats_on)
1109                 return;
1110         process = sbi->ll_rw_process_info;
1111         offset = sbi->ll_rw_offset_info;
1112
1113         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1114         /* Extent statistics */
1115         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1116                 if(io_extents->pp_extents[i].pid == pid) {
1117                         cur = i;
1118                         break;
1119                 }
1120         }
1121
1122         if (cur == -1) {
1123                 /* new process */
1124                 sbi->ll_extent_process_count =
1125                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1126                 cur = sbi->ll_extent_process_count;
1127                 io_extents->pp_extents[cur].pid = pid;
1128                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1129                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1130         }
1131
1132         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1133              (i < (LL_HIST_MAX - 1)); i++);
1134         if (rw == 0) {
1135                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1136                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1137         } else {
1138                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1139                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1140         }
1141         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1142
1143         cfs_spin_lock(&sbi->ll_process_lock);
1144         /* Offset statistics */
1145         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1146                 if (process[i].rw_pid == pid) {
1147                         if (process[i].rw_last_file != file) {
1148                                 process[i].rw_range_start = pos;
1149                                 process[i].rw_last_file_pos = pos + count;
1150                                 process[i].rw_smallest_extent = count;
1151                                 process[i].rw_largest_extent = count;
1152                                 process[i].rw_offset = 0;
1153                                 process[i].rw_last_file = file;
1154                                 cfs_spin_unlock(&sbi->ll_process_lock);
1155                                 return;
1156                         }
1157                         if (process[i].rw_last_file_pos != pos) {
1158                                 *off_count =
1159                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1160                                 offset[*off_count].rw_op = process[i].rw_op;
1161                                 offset[*off_count].rw_pid = pid;
1162                                 offset[*off_count].rw_range_start =
1163                                         process[i].rw_range_start;
1164                                 offset[*off_count].rw_range_end =
1165                                         process[i].rw_last_file_pos;
1166                                 offset[*off_count].rw_smallest_extent =
1167                                         process[i].rw_smallest_extent;
1168                                 offset[*off_count].rw_largest_extent =
1169                                         process[i].rw_largest_extent;
1170                                 offset[*off_count].rw_offset =
1171                                         process[i].rw_offset;
1172                                 process[i].rw_op = rw;
1173                                 process[i].rw_range_start = pos;
1174                                 process[i].rw_smallest_extent = count;
1175                                 process[i].rw_largest_extent = count;
1176                                 process[i].rw_offset = pos -
1177                                         process[i].rw_last_file_pos;
1178                         }
1179                         if(process[i].rw_smallest_extent > count)
1180                                 process[i].rw_smallest_extent = count;
1181                         if(process[i].rw_largest_extent < count)
1182                                 process[i].rw_largest_extent = count;
1183                         process[i].rw_last_file_pos = pos + count;
1184                         cfs_spin_unlock(&sbi->ll_process_lock);
1185                         return;
1186                 }
1187         }
1188         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1189         process[*process_count].rw_pid = pid;
1190         process[*process_count].rw_op = rw;
1191         process[*process_count].rw_range_start = pos;
1192         process[*process_count].rw_last_file_pos = pos + count;
1193         process[*process_count].rw_smallest_extent = count;
1194         process[*process_count].rw_largest_extent = count;
1195         process[*process_count].rw_offset = 0;
1196         process[*process_count].rw_last_file = file;
1197         cfs_spin_unlock(&sbi->ll_process_lock);
1198 }
1199
1200 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1201 {
1202         struct timeval now;
1203         struct ll_sb_info *sbi = seq->private;
1204         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1205         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1206         int i;
1207
1208         cfs_gettimeofday(&now);
1209
1210         if (!sbi->ll_rw_stats_on) {
1211                 seq_printf(seq, "disabled\n"
1212                                 "write anything in this file to activate, "
1213                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1214                 return 0;
1215         }
1216         cfs_spin_lock(&sbi->ll_process_lock);
1217
1218         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1219                    now.tv_sec, now.tv_usec);
1220         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1221                    "R/W", "PID", "RANGE START", "RANGE END",
1222                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1223         /* We stored the discontiguous offsets here; print them first */
1224         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1225                 if (offset[i].rw_pid != 0)
1226                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1227                                    offset[i].rw_op ? 'W' : 'R',
1228                                    offset[i].rw_pid,
1229                                    offset[i].rw_range_start,
1230                                    offset[i].rw_range_end,
1231                                    (unsigned long)offset[i].rw_smallest_extent,
1232                                    (unsigned long)offset[i].rw_largest_extent,
1233                                    offset[i].rw_offset);
1234         }
1235         /* Then print the current offsets for each process */
1236         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1237                 if (process[i].rw_pid != 0)
1238                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1239                                    process[i].rw_op ? 'W' : 'R',
1240                                    process[i].rw_pid,
1241                                    process[i].rw_range_start,
1242                                    process[i].rw_last_file_pos,
1243                                    (unsigned long)process[i].rw_smallest_extent,
1244                                    (unsigned long)process[i].rw_largest_extent,
1245                                    process[i].rw_offset);
1246         }
1247         cfs_spin_unlock(&sbi->ll_process_lock);
1248
1249         return 0;
1250 }
1251
1252 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1253                                        size_t len, loff_t *off)
1254 {
1255         struct seq_file *seq = file->private_data;
1256         struct ll_sb_info *sbi = seq->private;
1257         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1258         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1259         int value = 1, rc = 0;
1260
1261         rc = lprocfs_write_helper(buf, len, &value);
1262
1263         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1264                            strcmp(buf, "Disabled") == 0))
1265                 value = 0;
1266
1267         if (value == 0)
1268                 sbi->ll_rw_stats_on = 0;
1269         else
1270                 sbi->ll_rw_stats_on = 1;
1271
1272         cfs_spin_lock(&sbi->ll_process_lock);
1273         sbi->ll_offset_process_count = 0;
1274         sbi->ll_rw_offset_entry_count = 0;
1275         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1276                LL_PROCESS_HIST_MAX);
1277         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1278                LL_OFFSET_HIST_MAX);
1279         cfs_spin_unlock(&sbi->ll_process_lock);
1280
1281         return len;
1282 }
1283
1284 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1285
1286 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1287 {
1288     lvars->module_vars  = NULL;
1289     lvars->obd_vars     = lprocfs_llite_obd_vars;
1290 }
1291 #endif /* LPROCFS */