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  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/version.h>
  39 #include <lustre_lite.h>
  40 #include <lprocfs_status.h>
  41 #include <linux/seq_file.h>
  42 #include <obd_support.h>
  43
  44 #include "llite_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 extern struct file_operations vvp_dump_pgcache_file_ops;
  51 struct file_operations ll_rw_extents_stats_fops;
  52 struct file_operations ll_rw_extents_stats_pp_fops;
  53 struct file_operations ll_rw_offset_stats_fops;
  54
  55 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  56                          int *eof, void *data)
  57 {
  58         struct super_block *sb = (struct super_block *)data;
  59         struct obd_statfs osfs;
  60         int rc;
  61
  62         LASSERT(sb != NULL);
  63         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
  64                                 OBD_STATFS_NODELAY);
  65         if (!rc) {
  66               *eof = 1;
  67               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  68         }
  69
  70         return rc;
  71 }
  72
  73 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  74                              int *eof, void *data)
  75 {
  76         struct super_block *sb = (struct super_block *)data;
  77         struct obd_statfs osfs;
  78         int rc;
  79
  80         LASSERT(sb != NULL);
  81         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
  82                                 OBD_STATFS_NODELAY);
  83         if (!rc) {
  84                 __u32 blk_size = osfs.os_bsize >> 10;
  85                 __u64 result = osfs.os_blocks;
  86
  87                 while (blk_size >>= 1)
  88                         result <<= 1;
  89
  90                 *eof = 1;
  91                 rc = snprintf(page, count, LPU64"\n", result);
  92         }
  93         return rc;
  94
  95 }
  96
  97 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
  98                             int *eof, void *data)
  99 {
 100         struct super_block *sb = (struct super_block *)data;
 101         struct obd_statfs osfs;
 102         int rc;
 103
 104         LASSERT(sb != NULL);
 105         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 106                                 OBD_STATFS_NODELAY);
 107         if (!rc) {
 108                 __u32 blk_size = osfs.os_bsize >> 10;
 109                 __u64 result = osfs.os_bfree;
 110
 111                 while (blk_size >>= 1)
 112                         result <<= 1;
 113
 114                 *eof = 1;
 115                 rc = snprintf(page, count, LPU64"\n", result);
 116         }
 117         return rc;
 118 }
 119
 120 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 121                              int *eof, void *data)
 122 {
 123         struct super_block *sb = (struct super_block *)data;
 124         struct obd_statfs osfs;
 125         int rc;
 126
 127         LASSERT(sb != NULL);
 128         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 129                                 OBD_STATFS_NODELAY);
 130         if (!rc) {
 131                 __u32 blk_size = osfs.os_bsize >> 10;
 132                 __u64 result = osfs.os_bavail;
 133
 134                 while (blk_size >>= 1)
 135                         result <<= 1;
 136
 137                 *eof = 1;
 138                 rc = snprintf(page, count, LPU64"\n", result);
 139         }
 140         return rc;
 141 }
 142
 143 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 144                             int *eof, void *data)
 145 {
 146         struct super_block *sb = (struct super_block *)data;
 147         struct obd_statfs osfs;
 148         int rc;
 149
 150         LASSERT(sb != NULL);
 151         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 152                                 OBD_STATFS_NODELAY);
 153         if (!rc) {
 154                  *eof = 1;
 155                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 156         }
 157         return rc;
 158 }
 159
 160 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 161                            int *eof, void *data)
 162 {
 163         struct super_block *sb = (struct super_block *)data;
 164         struct obd_statfs osfs;
 165         int rc;
 166
 167         LASSERT(sb != NULL);
 168         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - HZ,
 169                                 OBD_STATFS_NODELAY);
 170         if (!rc) {
 171                  *eof = 1;
 172                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 173         }
 174         return rc;
 175
 176 }
 177
 178 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 179                             int *eof, void *data)
 180 {
 181         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 182         int rc;
 183
 184         LASSERT(sbi != NULL);
 185
 186         *eof = 1;
 187         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 188                 rc = snprintf(page, count, "remote client\n");
 189         else
 190                 rc = snprintf(page, count, "local client\n");
 191
 192         return rc;
 193 }
 194
 195 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 196                         int *eof, void *data)
 197 {
 198         struct super_block *sb = (struct super_block*)data;
 199
 200         LASSERT(sb != NULL);
 201         *eof = 1;
 202         return snprintf(page, count, "%s\n", sb->s_type->name);
 203 }
 204
 205 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 206                          int *eof, void *data)
 207 {
 208         struct super_block *sb = (struct super_block *)data;
 209
 210         LASSERT(sb != NULL);
 211         *eof = 1;
 212         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 213 }
 214
 215 static int ll_rd_site_stats(char *page, char **start, off_t off,
 216                             int count, int *eof, void *data)
 217 {
 218         struct super_block *sb = data;
 219
 220         /*
 221          * See description of statistical counters in struct cl_site, and
 222          * struct lu_site.
 223          */
 224         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 225                                    page, count);
 226 }
 227
 228 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 229                                    int count, int *eof, void *data)
 230 {
 231         struct super_block *sb = data;
 232         struct ll_sb_info *sbi = ll_s2sbi(sb);
 233         long pages_number;
 234         int mult;
 235
 236         spin_lock(&sbi->ll_lock);
 237         pages_number = sbi->ll_ra_info.ra_max_pages;
 238         spin_unlock(&sbi->ll_lock);
 239
 240         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 241         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 242 }
 243
 244 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 245                                    unsigned long count, void *data)
 246 {
 247         struct super_block *sb = data;
 248         struct ll_sb_info *sbi = ll_s2sbi(sb);
 249         int mult, rc, pages_number;
 250
 251         mult = 1 << (20 - CFS_PAGE_SHIFT);
 252         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 253         if (rc)
 254                 return rc;
 255
 256         if (pages_number < 0 || pages_number > num_physpages / 2) {
 257                 CERROR("can't set file readahead more than %lu MB\n",
 258                         num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 259                 return -ERANGE;
 260         }
 261
 262         spin_lock(&sbi->ll_lock);
 263         sbi->ll_ra_info.ra_max_pages = pages_number;
 264         spin_unlock(&sbi->ll_lock);
 265
 266         return count;
 267 }
 268
 269 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 270                                        int count, int *eof, void *data)
 271 {
 272         struct super_block *sb = data;
 273         struct ll_sb_info *sbi = ll_s2sbi(sb);
 274         long pages_number;
 275         int mult;
 276
 277         spin_lock(&sbi->ll_lock);
 278         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 279         spin_unlock(&sbi->ll_lock);
 280
 281         mult = 1 << (20 - CFS_PAGE_SHIFT);
 282         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 283 }
 284
 285 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 286                                        unsigned long count, void *data)
 287 {
 288         struct super_block *sb = data;
 289         struct ll_sb_info *sbi = ll_s2sbi(sb);
 290         int mult, rc, pages_number;
 291
 292         mult = 1 << (20 - CFS_PAGE_SHIFT);
 293         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 294         if (rc)
 295                 return rc;
 296
 297         /* Cap this at the current max readahead window size, the readahead
 298          * algorithm does this anyway so it's pointless to set it larger. */
 299         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
 300                 CERROR("can't set max_read_ahead_whole_mb more than "
 301                        "max_read_ahead_mb: %lu\n",
 302                        sbi->ll_ra_info.ra_max_pages >> (20 - CFS_PAGE_SHIFT));
 303                 return -ERANGE;
 304         }
 305
 306         spin_lock(&sbi->ll_lock);
 307         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 308         spin_unlock(&sbi->ll_lock);
 309
 310         return count;
 311 }
 312
 313 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 314                                int count, int *eof, void *data)
 315 {
 316         struct super_block *sb = data;
 317         struct ll_sb_info *sbi = ll_s2sbi(sb);
 318         long pages_number;
 319         int mult;
 320
 321         spin_lock(&sbi->ll_lock);
 322         pages_number = sbi->ll_async_page_max;
 323         spin_unlock(&sbi->ll_lock);
 324
 325         mult = 1 << (20 - CFS_PAGE_SHIFT);
 326         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 327 }
 328
 329 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 330                                   unsigned long count, void *data)
 331 {
 332         struct super_block *sb = data;
 333         struct ll_sb_info *sbi = ll_s2sbi(sb);
 334         int mult, rc, pages_number;
 335
 336         mult = 1 << (20 - CFS_PAGE_SHIFT);
 337         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 338         if (rc)
 339                 return rc;
 340
 341         if (pages_number < 0 || pages_number > num_physpages) {
 342                 CERROR("can't set max cache more than %lu MB\n",
 343                         num_physpages >> (20 - CFS_PAGE_SHIFT));
 344                 return -ERANGE;
 345         }
 346
 347         spin_lock(&sbi->ll_lock);
 348         sbi->ll_async_page_max = pages_number ;
 349         spin_unlock(&sbi->ll_lock);
 350
 351         if (!sbi->ll_dt_exp)
 352                 /* Not set up yet, don't call llap_shrink_cache */
 353                 return count;
 354
 355         return count;
 356 }
 357
 358 static int ll_rd_checksum(char *page, char **start, off_t off,
 359                           int count, int *eof, void *data)
 360 {
 361         struct super_block *sb = data;
 362         struct ll_sb_info *sbi = ll_s2sbi(sb);
 363
 364         return snprintf(page, count, "%u\n",
 365                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 366 }
 367
 368 static int ll_wr_checksum(struct file *file, const char *buffer,
 369                           unsigned long count, void *data)
 370 {
 371         struct super_block *sb = data;
 372         struct ll_sb_info *sbi = ll_s2sbi(sb);
 373         int val, rc;
 374
 375         if (!sbi->ll_dt_exp)
 376                 /* Not set up yet */
 377                 return -EAGAIN;
 378
 379         rc = lprocfs_write_helper(buffer, count, &val);
 380         if (rc)
 381                 return rc;
 382         if (val)
 383                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 384         else
 385                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 386
 387         rc = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 388                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 389         if (rc)
 390                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 391
 392         return count;
 393 }
 394
 395 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 396                           int count, int *eof, void *data)
 397 {
 398         struct super_block *sb = data;
 399
 400         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 401 }
 402
 403 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 404                           unsigned long count, void *data)
 405 {
 406         struct super_block *sb = data;
 407         int rc, val;
 408
 409         rc = lprocfs_write_helper(buffer, count, &val);
 410         if (rc)
 411                 return rc;
 412         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 413         return count;
 414 }
 415
 416 static int ll_rd_track_id(char *page, int count, void *data,
 417                           enum stats_track_type type)
 418 {
 419         struct super_block *sb = data;
 420
 421         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 422                 return snprintf(page, count, "%d\n",
 423                                 ll_s2sbi(sb)->ll_stats_track_id);
 424
 425         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 426                 return snprintf(page, count, "0 (all)\n");
 427         } else {
 428                 return snprintf(page, count, "untracked\n");
 429         }
 430 }
 431
 432 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 433                           enum stats_track_type type)
 434 {
 435         struct super_block *sb = data;
 436         int rc, pid;
 437
 438         rc = lprocfs_write_helper(buffer, count, &pid);
 439         if (rc)
 440                 return rc;
 441         ll_s2sbi(sb)->ll_stats_track_id = pid;
 442         if (pid == 0)
 443                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 444         else
 445                 ll_s2sbi(sb)->ll_stats_track_type = type;
 446         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 447         return count;
 448 }
 449
 450 static int ll_rd_track_pid(char *page, char **start, off_t off,
 451                           int count, int *eof, void *data)
 452 {
 453         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 454 }
 455
 456 static int ll_wr_track_pid(struct file *file, const char *buffer,
 457                           unsigned long count, void *data)
 458 {
 459         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 460 }
 461
 462 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 463                           int count, int *eof, void *data)
 464 {
 465         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 466 }
 467
 468 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 469                           unsigned long count, void *data)
 470 {
 471         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 472 }
 473
 474 static int ll_rd_track_gid(char *page, char **start, off_t off,
 475                           int count, int *eof, void *data)
 476 {
 477         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 478 }
 479
 480 static int ll_wr_track_gid(struct file *file, const char *buffer,
 481                           unsigned long count, void *data)
 482 {
 483         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 484 }
 485
 486 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 487                                int count, int *eof, void *data)
 488 {
 489         struct super_block *sb = data;
 490         struct ll_sb_info *sbi = ll_s2sbi(sb);
 491
 492         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 493 }
 494
 495 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 496                                unsigned long count, void *data)
 497 {
 498         struct super_block *sb = data;
 499         struct ll_sb_info *sbi = ll_s2sbi(sb);
 500         int val, rc;
 501
 502         rc = lprocfs_write_helper(buffer, count, &val);
 503         if (rc)
 504                 return rc;
 505
 506         if (val >= 0 && val <= LL_SA_RPC_MAX)
 507                 sbi->ll_sa_max = val;
 508         else
 509                 CERROR("Bad statahead_max value %d. Valid values are in the "
 510                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 511
 512         return count;
 513 }
 514
 515 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 516                                  int count, int *eof, void *data)
 517 {
 518         struct super_block *sb = data;
 519         struct ll_sb_info *sbi = ll_s2sbi(sb);
 520
 521         return snprintf(page, count,
 522                         "statahead wrong: %u\n"
 523                         "statahead total: %u\n"
 524                         "ls blocked:      %llu\n"
 525                         "ls cached:       %llu\n"
 526                         "hit count:       %llu\n"
 527                         "miss count:      %llu\n",
 528                         sbi->ll_sa_wrong,
 529                         sbi->ll_sa_total,
 530                         sbi->ll_sa_blocked,
 531                         sbi->ll_sa_cached,
 532                         sbi->ll_sa_hit,
 533                         sbi->ll_sa_miss);
 534 }
 535
 536 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 537         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 538         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 539         { "fstype",       ll_rd_fstype,           0, 0 },
 540         { "site",         ll_rd_site_stats,       0, 0 },
 541         { "blocksize",    ll_rd_blksize,          0, 0 },
 542         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 543         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 544         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 545         { "filestotal",   ll_rd_filestotal,       0, 0 },
 546         { "filesfree",    ll_rd_filesfree,        0, 0 },
 547         { "client_type",  ll_rd_client_type,      0, 0 },
 548         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 549         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 550                                ll_wr_max_readahead_mb, 0 },
 551         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 552                                      ll_wr_max_read_ahead_whole_mb, 0 },
 553         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 554         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 555         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 556         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 557         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 558         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 559         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 560         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 561         { 0 }
 562 };
 563
 564 #define MAX_STRING_SIZE 128
 565
 566 struct llite_file_opcode {
 567         __u32       opcode;
 568         __u32       type;
 569         const char *opname;
 570 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 571         /* file operation */
 572         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 573         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 574         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 575                                    "writeback_from_writepage" },
 576         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 577                                    "writeback_from_pressure" },
 578         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 579                                    "writeback_ok_pages" },
 580         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 581                                    "writeback_failed_pages" },
 582         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 583                                    "read_bytes" },
 584         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 585                                    "write_bytes" },
 586         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 587                                    "brw_read" },
 588         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 589                                    "brw_write" },
 590
 591         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 592         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 593         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 594         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 595         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 596         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 597         /* inode operation */
 598         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 599         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 600         { LPROC_LL_LOCKLESS_TRUNC, LPROCFS_TYPE_REGS, "lockless_truncate"},
 601         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 602         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 603         /* special inode operation */
 604         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 605         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 606         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 607         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 608         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 609         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 610         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 611         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 612                                    "direct_read" },
 613         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 614                                    "direct_write" },
 615         { LPROC_LL_LOCKLESS_READ,  LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 616                                    "lockless_read_bytes" },
 617         { LPROC_LL_LOCKLESS_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 618                                    "lockless_write_bytes" },
 619
 620 };
 621
 622 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 623 {
 624         if (!sbi->ll_stats)
 625                 return;
 626         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 627                 lprocfs_counter_add(sbi->ll_stats, op, count);
 628         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 629                  sbi->ll_stats_track_id == current->pid)
 630                 lprocfs_counter_add(sbi->ll_stats, op, count);
 631         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 632                  sbi->ll_stats_track_id == current->p_pptr->pid)
 633                 lprocfs_counter_add(sbi->ll_stats, op, count);
 634         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 635                  sbi->ll_stats_track_id == current->gid)
 636                 lprocfs_counter_add(sbi->ll_stats, op, count);
 637 }
 638 EXPORT_SYMBOL(ll_stats_ops_tally);
 639
 640 static const char *ra_stat_string[] = {
 641         [RA_STAT_HIT] = "hits",
 642         [RA_STAT_MISS] = "misses",
 643         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 644         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 645         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 646         [RA_STAT_FAILED_MATCH] = "failed lock match",
 647         [RA_STAT_DISCARDED] = "read but discarded",
 648         [RA_STAT_ZERO_LEN] = "zero length file",
 649         [RA_STAT_ZERO_WINDOW] = "zero size window",
 650         [RA_STAT_EOF] = "read-ahead to EOF",
 651         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 652         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 653 };
 654
 655
 656 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 657                                 struct super_block *sb, char *osc, char *mdc)
 658 {
 659         struct lprocfs_vars lvars[2];
 660         struct lustre_sb_info *lsi = s2lsi(sb);
 661         struct ll_sb_info *sbi = ll_s2sbi(sb);
 662         struct obd_device *obd;
 663         char name[MAX_STRING_SIZE + 1], *ptr;
 664         int err, id, len, rc;
 665         ENTRY;
 666
 667         memset(lvars, 0, sizeof(lvars));
 668
 669         name[MAX_STRING_SIZE] = '\0';
 670         lvars[0].name = name;
 671
 672         LASSERT(sbi != NULL);
 673         LASSERT(mdc != NULL);
 674         LASSERT(osc != NULL);
 675
 676         /* Get fsname */
 677         len = strlen(lsi->lsi_lmd->lmd_profile);
 678         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 679         if (ptr && (strcmp(ptr, "-client") == 0))
 680                 len -= 7;
 681
 682         /* Mount info */
 683         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 684                  lsi->lsi_lmd->lmd_profile, sb);
 685
 686         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 687         if (IS_ERR(sbi->ll_proc_root)) {
 688                 err = PTR_ERR(sbi->ll_proc_root);
 689                 sbi->ll_proc_root = NULL;
 690                 RETURN(err);
 691         }
 692
 693         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 694                                 &vvp_dump_pgcache_file_ops, sbi);
 695         if (rc)
 696                 CWARN("Error adding the dump_page_cache file\n");
 697
 698         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 699                                 &ll_rw_extents_stats_fops, sbi);
 700         if (rc)
 701                 CWARN("Error adding the extent_stats file\n");
 702
 703         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 704                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 705         if (rc)
 706                 CWARN("Error adding the extents_stats_per_process file\n");
 707
 708         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 709                                 &ll_rw_offset_stats_fops, sbi);
 710         if (rc)
 711                 CWARN("Error adding the offset_stats file\n");
 712
 713         /* File operations stats */
 714         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 715                                             LPROCFS_STATS_FLAG_PERCPU);
 716         if (sbi->ll_stats == NULL)
 717                 GOTO(out, err = -ENOMEM);
 718         /* do counter init */
 719         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 720                 __u32 type = llite_opcode_table[id].type;
 721                 void *ptr = NULL;
 722                 if (type & LPROCFS_TYPE_REGS)
 723                         ptr = "regs";
 724                 else if (type & LPROCFS_TYPE_BYTES)
 725                         ptr = "bytes";
 726                 else if (type & LPROCFS_TYPE_PAGES)
 727                         ptr = "pages";
 728                 lprocfs_counter_init(sbi->ll_stats,
 729                                      llite_opcode_table[id].opcode,
 730                                      (type & LPROCFS_CNTR_AVGMINMAX),
 731                                      llite_opcode_table[id].opname, ptr);
 732         }
 733         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 734         if (err)
 735                 GOTO(out, err);
 736
 737         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 738                                                LPROCFS_STATS_FLAG_PERCPU);
 739         if (sbi->ll_ra_stats == NULL)
 740                 GOTO(out, err = -ENOMEM);
 741
 742         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 743                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 744                                      ra_stat_string[id], "pages");
 745         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 746                                      sbi->ll_ra_stats);
 747         if (err)
 748                 GOTO(out, err);
 749
 750
 751         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 752         if (err)
 753                 GOTO(out, err);
 754
 755         /* MDC info */
 756         obd = class_name2obd(mdc);
 757
 758         LASSERT(obd != NULL);
 759         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 760         LASSERT(obd->obd_type->typ_name != NULL);
 761
 762         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 763                  obd->obd_type->typ_name);
 764         lvars[0].read_fptr = lprocfs_rd_name;
 765         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 766         if (err)
 767                 GOTO(out, err);
 768
 769         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 770         lvars[0].read_fptr = lprocfs_rd_uuid;
 771         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 772         if (err)
 773                 GOTO(out, err);
 774
 775         /* OSC */
 776         obd = class_name2obd(osc);
 777
 778         LASSERT(obd != NULL);
 779         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 780         LASSERT(obd->obd_type->typ_name != NULL);
 781
 782         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 783                  obd->obd_type->typ_name);
 784         lvars[0].read_fptr = lprocfs_rd_name;
 785         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 786         if (err)
 787                 GOTO(out, err);
 788
 789         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 790         lvars[0].read_fptr = lprocfs_rd_uuid;
 791         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 792 out:
 793         if (err) {
 794                 lprocfs_remove(&sbi->ll_proc_root);
 795                 lprocfs_free_stats(&sbi->ll_ra_stats);
 796                 lprocfs_free_stats(&sbi->ll_stats);
 797         }
 798         RETURN(err);
 799 }
 800
 801 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 802 {
 803         if (sbi->ll_proc_root) {
 804                 lprocfs_remove(&sbi->ll_proc_root);
 805                 lprocfs_free_stats(&sbi->ll_ra_stats);
 806                 lprocfs_free_stats(&sbi->ll_stats);
 807         }
 808 }
 809 #undef MAX_STRING_SIZE
 810
 811 #define pct(a,b) (b ? a * 100 / b : 0)
 812
 813 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 814                                    struct seq_file *seq, int which)
 815 {
 816         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 817         unsigned long start, end, r, w;
 818         char *unitp = "KMGTPEZY";
 819         int i, units = 10;
 820         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 821
 822         read_cum = 0;
 823         write_cum = 0;
 824         start = 0;
 825
 826         for(i = 0; i < LL_HIST_MAX; i++) {
 827                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 828                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 829         }
 830
 831         for(i = 0; i < LL_HIST_MAX; i++) {
 832                 r = pp_info->pp_r_hist.oh_buckets[i];
 833                 w = pp_info->pp_w_hist.oh_buckets[i];
 834                 read_cum += r;
 835                 write_cum += w;
 836                 end = 1 << (i + LL_HIST_START - units);
 837                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 838                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 839                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 840                            r, pct(r, read_tot), pct(read_cum, read_tot),
 841                            w, pct(w, write_tot), pct(write_cum, write_tot));
 842                 start = end;
 843                 if (start == 1<<10) {
 844                         start = 1;
 845                         units += 10;
 846                         unitp++;
 847                 }
 848                 if (read_cum == read_tot && write_cum == write_tot)
 849                         break;
 850         }
 851 }
 852
 853 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 854 {
 855         struct timeval now;
 856         struct ll_sb_info *sbi = seq->private;
 857         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 858         int k;
 859
 860         do_gettimeofday(&now);
 861
 862         if (!sbi->ll_rw_stats_on) {
 863                 seq_printf(seq, "disabled\n"
 864                                 "write anything in this file to activate, "
 865                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 866                 return 0;
 867         }
 868         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 869                    now.tv_sec, now.tv_usec);
 870         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 871         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 872                    "extents", "calls", "%", "cum%",
 873                    "calls", "%", "cum%");
 874         spin_lock(&sbi->ll_pp_extent_lock);
 875         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
 876                 if(io_extents->pp_extents[k].pid != 0) {
 877                         seq_printf(seq, "\nPID: %d\n",
 878                                    io_extents->pp_extents[k].pid);
 879                         ll_display_extents_info(io_extents, seq, k);
 880                 }
 881         }
 882         spin_unlock(&sbi->ll_pp_extent_lock);
 883         return 0;
 884 }
 885
 886 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
 887                                                 const char *buf, size_t len,
 888                                                 loff_t *off)
 889 {
 890         struct seq_file *seq = file->private_data;
 891         struct ll_sb_info *sbi = seq->private;
 892         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 893         int i;
 894         int value = 1, rc = 0;
 895
 896         rc = lprocfs_write_helper(buf, len, &value);
 897         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
 898                        strcmp(buf, "Disabled") == 0))
 899                 value = 0;
 900
 901         if (value == 0)
 902                 sbi->ll_rw_stats_on = 0;
 903         else
 904                 sbi->ll_rw_stats_on = 1;
 905
 906         spin_lock(&sbi->ll_pp_extent_lock);
 907         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
 908                 io_extents->pp_extents[i].pid = 0;
 909                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
 910                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
 911         }
 912         spin_unlock(&sbi->ll_pp_extent_lock);
 913         return len;
 914 }
 915
 916 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
 917
 918 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
 919 {
 920         struct timeval now;
 921         struct ll_sb_info *sbi = seq->private;
 922         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 923
 924         do_gettimeofday(&now);
 925
 926         if (!sbi->ll_rw_stats_on) {
 927                 seq_printf(seq, "disabled\n"
 928                                 "write anything in this file to activate, "
 929                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 930                 return 0;
 931         }
 932         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 933                    now.tv_sec, now.tv_usec);
 934
 935         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 936         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 937                    "extents", "calls", "%", "cum%",
 938                    "calls", "%", "cum%");
 939         spin_lock(&sbi->ll_lock);
 940         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
 941         spin_unlock(&sbi->ll_lock);
 942
 943         return 0;
 944 }
 945
 946 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
 947                                         size_t len, loff_t *off)
 948 {
 949         struct seq_file *seq = file->private_data;
 950         struct ll_sb_info *sbi = seq->private;
 951         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 952         int i;
 953         int value = 1, rc = 0;
 954
 955         rc = lprocfs_write_helper(buf, len, &value);
 956         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
 957                        strcmp(buf, "Disabled") == 0))
 958                 value = 0;
 959
 960         if (value == 0)
 961                 sbi->ll_rw_stats_on = 0;
 962         else
 963                 sbi->ll_rw_stats_on = 1;
 964         spin_lock(&sbi->ll_pp_extent_lock);
 965         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
 966         {
 967                 io_extents->pp_extents[i].pid = 0;
 968                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
 969                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
 970         }
 971         spin_unlock(&sbi->ll_pp_extent_lock);
 972
 973         return len;
 974 }
 975
 976 LPROC_SEQ_FOPS(ll_rw_extents_stats);
 977
 978 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
 979                        struct ll_file_data *file, loff_t pos,
 980                        size_t count, int rw)
 981 {
 982         int i, cur = -1;
 983         struct ll_rw_process_info *process;
 984         struct ll_rw_process_info *offset;
 985         int *off_count = &sbi->ll_rw_offset_entry_count;
 986         int *process_count = &sbi->ll_offset_process_count;
 987         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 988
 989         if(!sbi->ll_rw_stats_on)
 990                 return;
 991         process = sbi->ll_rw_process_info;
 992         offset = sbi->ll_rw_offset_info;
 993
 994         spin_lock(&sbi->ll_pp_extent_lock);
 995         /* Extent statistics */
 996         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
 997                 if(io_extents->pp_extents[i].pid == pid) {
 998                         cur = i;
 999                         break;
1000                 }
1001         }
1002
1003         if (cur == -1) {
1004                 /* new process */
1005                 sbi->ll_extent_process_count =
1006                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1007                 cur = sbi->ll_extent_process_count;
1008                 io_extents->pp_extents[cur].pid = pid;
1009                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1010                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1011         }
1012
1013         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1014              (i < (LL_HIST_MAX - 1)); i++);
1015         if (rw == 0) {
1016                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1017                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1018         } else {
1019                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1020                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1021         }
1022         spin_unlock(&sbi->ll_pp_extent_lock);
1023
1024         spin_lock(&sbi->ll_process_lock);
1025         /* Offset statistics */
1026         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1027                 if (process[i].rw_pid == pid) {
1028                         if (process[i].rw_last_file != file) {
1029                                 process[i].rw_range_start = pos;
1030                                 process[i].rw_last_file_pos = pos + count;
1031                                 process[i].rw_smallest_extent = count;
1032                                 process[i].rw_largest_extent = count;
1033                                 process[i].rw_offset = 0;
1034                                 process[i].rw_last_file = file;
1035                                 spin_unlock(&sbi->ll_process_lock);
1036                                 return;
1037                         }
1038                         if (process[i].rw_last_file_pos != pos) {
1039                                 *off_count =
1040                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1041                                 offset[*off_count].rw_op = process[i].rw_op;
1042                                 offset[*off_count].rw_pid = pid;
1043                                 offset[*off_count].rw_range_start =
1044                                         process[i].rw_range_start;
1045                                 offset[*off_count].rw_range_end =
1046                                         process[i].rw_last_file_pos;
1047                                 offset[*off_count].rw_smallest_extent =
1048                                         process[i].rw_smallest_extent;
1049                                 offset[*off_count].rw_largest_extent =
1050                                         process[i].rw_largest_extent;
1051                                 offset[*off_count].rw_offset =
1052                                         process[i].rw_offset;
1053                                 process[i].rw_op = rw;
1054                                 process[i].rw_range_start = pos;
1055                                 process[i].rw_smallest_extent = count;
1056                                 process[i].rw_largest_extent = count;
1057                                 process[i].rw_offset = pos -
1058                                         process[i].rw_last_file_pos;
1059                         }
1060                         if(process[i].rw_smallest_extent > count)
1061                                 process[i].rw_smallest_extent = count;
1062                         if(process[i].rw_largest_extent < count)
1063                                 process[i].rw_largest_extent = count;
1064                         process[i].rw_last_file_pos = pos + count;
1065                         spin_unlock(&sbi->ll_process_lock);
1066                         return;
1067                 }
1068         }
1069         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1070         process[*process_count].rw_pid = pid;
1071         process[*process_count].rw_op = rw;
1072         process[*process_count].rw_range_start = pos;
1073         process[*process_count].rw_last_file_pos = pos + count;
1074         process[*process_count].rw_smallest_extent = count;
1075         process[*process_count].rw_largest_extent = count;
1076         process[*process_count].rw_offset = 0;
1077         process[*process_count].rw_last_file = file;
1078         spin_unlock(&sbi->ll_process_lock);
1079 }
1080
1081 char lpszt[] = LPSZ;
1082
1083 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1084 {
1085         struct timeval now;
1086         struct ll_sb_info *sbi = seq->private;
1087         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1088         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1089         char format[50];
1090         int i;
1091
1092         do_gettimeofday(&now);
1093
1094         if (!sbi->ll_rw_stats_on) {
1095                 seq_printf(seq, "disabled\n"
1096                                 "write anything in this file to activate, "
1097                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1098                 return 0;
1099         }
1100         spin_lock(&sbi->ll_process_lock);
1101
1102         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1103                    now.tv_sec, now.tv_usec);
1104         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1105                    "R/W", "PID", "RANGE START", "RANGE END",
1106                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1107         sprintf(format, "%s%s%s%s%s\n",
1108                 "%3c %10d %14Lu %14Lu %17", lpszt+1, " %17", lpszt+1, " %14Ld");
1109         /* We stored the discontiguous offsets here; print them first */
1110         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1111                 if (offset[i].rw_pid != 0)
1112                         /* Is there a way to snip the '%' off of LPSZ? */
1113                         seq_printf(seq, format,
1114                                    offset[i].rw_op ? 'W' : 'R',
1115                                    offset[i].rw_pid,
1116                                    offset[i].rw_range_start,
1117                                    offset[i].rw_range_end,
1118                                    offset[i].rw_smallest_extent,
1119                                    offset[i].rw_largest_extent,
1120                                    offset[i].rw_offset);
1121         }
1122         /* Then print the current offsets for each process */
1123         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1124                 if (process[i].rw_pid != 0)
1125                         seq_printf(seq, format,
1126                                    process[i].rw_op ? 'W' : 'R',
1127                                    process[i].rw_pid,
1128                                    process[i].rw_range_start,
1129                                    process[i].rw_last_file_pos,
1130                                    process[i].rw_smallest_extent,
1131                                    process[i].rw_largest_extent,
1132                                    process[i].rw_offset);
1133         }
1134         spin_unlock(&sbi->ll_process_lock);
1135
1136         return 0;
1137 }
1138
1139 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1140                                        size_t len, loff_t *off)
1141 {
1142         struct seq_file *seq = file->private_data;
1143         struct ll_sb_info *sbi = seq->private;
1144         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1145         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1146         int value = 1, rc = 0;
1147
1148         rc = lprocfs_write_helper(buf, len, &value);
1149
1150         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1151                            strcmp(buf, "Disabled") == 0))
1152                 value = 0;
1153
1154         if (value == 0)
1155                 sbi->ll_rw_stats_on = 0;
1156         else
1157                 sbi->ll_rw_stats_on = 1;
1158
1159         spin_lock(&sbi->ll_process_lock);
1160         sbi->ll_offset_process_count = 0;
1161         sbi->ll_rw_offset_entry_count = 0;
1162         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1163                LL_PROCESS_HIST_MAX);
1164         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1165                LL_OFFSET_HIST_MAX);
1166         spin_unlock(&sbi->ll_process_lock);
1167
1168         return len;
1169 }
1170
1171 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1172
1173 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1174 {
1175     lvars->module_vars  = NULL;
1176     lvars->obd_vars     = lprocfs_llite_obd_vars;
1177 }
1178 #endif /* LPROCFS */