lustre/llite/lproc_llite.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  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,
  64                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  65                                 OBD_STATFS_NODELAY);
  66         if (!rc) {
  67               *eof = 1;
  68               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  69         }
  70
  71         return rc;
  72 }
  73
  74 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  75                              int *eof, void *data)
  76 {
  77         struct super_block *sb = (struct super_block *)data;
  78         struct obd_statfs osfs;
  79         int rc;
  80
  81         LASSERT(sb != NULL);
  82         rc = ll_statfs_internal(sb, &osfs,
  83                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  84                                 OBD_STATFS_NODELAY);
  85         if (!rc) {
  86                 __u32 blk_size = osfs.os_bsize >> 10;
  87                 __u64 result = osfs.os_blocks;
  88
  89                 while (blk_size >>= 1)
  90                         result <<= 1;
  91
  92                 *eof = 1;
  93                 rc = snprintf(page, count, LPU64"\n", result);
  94         }
  95         return rc;
  96
  97 }
  98
  99 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
 100                             int *eof, void *data)
 101 {
 102         struct super_block *sb = (struct super_block *)data;
 103         struct obd_statfs osfs;
 104         int rc;
 105
 106         LASSERT(sb != NULL);
 107         rc = ll_statfs_internal(sb, &osfs,
 108                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 109                                 OBD_STATFS_NODELAY);
 110         if (!rc) {
 111                 __u32 blk_size = osfs.os_bsize >> 10;
 112                 __u64 result = osfs.os_bfree;
 113
 114                 while (blk_size >>= 1)
 115                         result <<= 1;
 116
 117                 *eof = 1;
 118                 rc = snprintf(page, count, LPU64"\n", result);
 119         }
 120         return rc;
 121 }
 122
 123 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 124                              int *eof, void *data)
 125 {
 126         struct super_block *sb = (struct super_block *)data;
 127         struct obd_statfs osfs;
 128         int rc;
 129
 130         LASSERT(sb != NULL);
 131         rc = ll_statfs_internal(sb, &osfs,
 132                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 133                                 OBD_STATFS_NODELAY);
 134         if (!rc) {
 135                 __u32 blk_size = osfs.os_bsize >> 10;
 136                 __u64 result = osfs.os_bavail;
 137
 138                 while (blk_size >>= 1)
 139                         result <<= 1;
 140
 141                 *eof = 1;
 142                 rc = snprintf(page, count, LPU64"\n", result);
 143         }
 144         return rc;
 145 }
 146
 147 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 148                             int *eof, void *data)
 149 {
 150         struct super_block *sb = (struct super_block *)data;
 151         struct obd_statfs osfs;
 152         int rc;
 153
 154         LASSERT(sb != NULL);
 155         rc = ll_statfs_internal(sb, &osfs,
 156                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 157                                 OBD_STATFS_NODELAY);
 158         if (!rc) {
 159                  *eof = 1;
 160                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 161         }
 162         return rc;
 163 }
 164
 165 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 166                            int *eof, void *data)
 167 {
 168         struct super_block *sb = (struct super_block *)data;
 169         struct obd_statfs osfs;
 170         int rc;
 171
 172         LASSERT(sb != NULL);
 173         rc = ll_statfs_internal(sb, &osfs,
 174                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 175                                 OBD_STATFS_NODELAY);
 176         if (!rc) {
 177                  *eof = 1;
 178                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 179         }
 180         return rc;
 181
 182 }
 183
 184 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 185                             int *eof, void *data)
 186 {
 187         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 188         int rc;
 189
 190         LASSERT(sbi != NULL);
 191
 192         *eof = 1;
 193         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 194                 rc = snprintf(page, count, "remote client\n");
 195         else
 196                 rc = snprintf(page, count, "local client\n");
 197
 198         return rc;
 199 }
 200
 201 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 202                         int *eof, void *data)
 203 {
 204         struct super_block *sb = (struct super_block*)data;
 205
 206         LASSERT(sb != NULL);
 207         *eof = 1;
 208         return snprintf(page, count, "%s\n", sb->s_type->name);
 209 }
 210
 211 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 212                          int *eof, void *data)
 213 {
 214         struct super_block *sb = (struct super_block *)data;
 215
 216         LASSERT(sb != NULL);
 217         *eof = 1;
 218         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 219 }
 220
 221 static int ll_rd_xattr_cache(char *page, char **start, off_t off,
 222                                 int count, int *eof, void *data)
 223 {
 224         struct super_block *sb = (struct super_block *)data;
 225         struct ll_sb_info *sbi = ll_s2sbi(sb);
 226         int rc;
 227
 228         rc = snprintf(page, count, "%u\n", sbi->ll_xattr_cache_enabled);
 229
 230         return rc;
 231 }
 232
 233 static int ll_wr_xattr_cache(struct file *file, const char *buffer,
 234                                 unsigned long count, void *data)
 235 {
 236         struct super_block *sb = (struct super_block *)data;
 237         struct ll_sb_info *sbi = ll_s2sbi(sb);
 238         int val, rc;
 239
 240         rc = lprocfs_write_helper(buffer, count, &val);
 241         if (rc)
 242                 return rc;
 243
 244         if (val != 0 && val != 1)
 245                 return -ERANGE;
 246
 247         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 248                 return -ENOTSUPP;
 249
 250         sbi->ll_xattr_cache_enabled = val;
 251
 252         return count;
 253 }
 254
 255 static int ll_rd_site_stats(char *page, char **start, off_t off,
 256                             int count, int *eof, void *data)
 257 {
 258         struct super_block *sb = data;
 259
 260         /*
 261          * See description of statistical counters in struct cl_site, and
 262          * struct lu_site.
 263          */
 264         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 265                                    page, count);
 266 }
 267
 268 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 269                                    int count, int *eof, void *data)
 270 {
 271         struct super_block *sb = data;
 272         struct ll_sb_info *sbi = ll_s2sbi(sb);
 273         long pages_number;
 274         int mult;
 275
 276         spin_lock(&sbi->ll_lock);
 277         pages_number = sbi->ll_ra_info.ra_max_pages;
 278         spin_unlock(&sbi->ll_lock);
 279
 280         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 281         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 282 }
 283
 284 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 285                                   unsigned long count, void *data)
 286 {
 287         struct super_block *sb = data;
 288         struct ll_sb_info *sbi = ll_s2sbi(sb);
 289         int mult, rc, pages_number;
 290
 291         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 292         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 293         if (rc)
 294                 return rc;
 295
 296         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 297                 /* 1/2 of RAM */
 298                 CERROR("can't set file readahead more than %lu MB\n",
 299                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1));
 300                 return -ERANGE;
 301         }
 302
 303         spin_lock(&sbi->ll_lock);
 304         sbi->ll_ra_info.ra_max_pages = pages_number;
 305         spin_unlock(&sbi->ll_lock);
 306
 307         return count;
 308 }
 309
 310 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 311                                            int count, int *eof, void *data)
 312 {
 313         struct super_block *sb = data;
 314         struct ll_sb_info *sbi = ll_s2sbi(sb);
 315         long pages_number;
 316         int mult;
 317
 318         spin_lock(&sbi->ll_lock);
 319         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 320         spin_unlock(&sbi->ll_lock);
 321
 322         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 323         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 324 }
 325
 326 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 327                                           unsigned long count, void *data)
 328 {
 329         struct super_block *sb = data;
 330         struct ll_sb_info *sbi = ll_s2sbi(sb);
 331         int mult, rc, pages_number;
 332
 333         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 334         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 335         if (rc)
 336                 return rc;
 337
 338         if (pages_number < 0 ||
 339                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 340                 CERROR("can't set file readahead more than"
 341                        "max_read_ahead_mb %lu MB\n",
 342                        sbi->ll_ra_info.ra_max_pages);
 343                 return -ERANGE;
 344         }
 345
 346         spin_lock(&sbi->ll_lock);
 347         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 348         spin_unlock(&sbi->ll_lock);
 349
 350         return count;
 351 }
 352
 353 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 354                                          int count, int *eof, void *data)
 355 {
 356         struct super_block *sb = data;
 357         struct ll_sb_info *sbi = ll_s2sbi(sb);
 358         long pages_number;
 359         int mult;
 360
 361         spin_lock(&sbi->ll_lock);
 362         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 363         spin_unlock(&sbi->ll_lock);
 364
 365         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 366         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 367 }
 368
 369 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 370                                          unsigned long count, void *data)
 371 {
 372         struct super_block *sb = data;
 373         struct ll_sb_info *sbi = ll_s2sbi(sb);
 374         int mult, rc, pages_number;
 375
 376         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 377         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 378         if (rc)
 379                 return rc;
 380
 381         /* Cap this at the current max readahead window size, the readahead
 382          * algorithm does this anyway so it's pointless to set it larger. */
 383         if (pages_number < 0 ||
 384             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 385                 CERROR("can't set max_read_ahead_whole_mb more than "
 386                        "max_read_ahead_per_file_mb: %lu\n",
 387                         sbi->ll_ra_info.ra_max_pages_per_file >>
 388                         (20 - PAGE_CACHE_SHIFT));
 389                 return -ERANGE;
 390         }
 391
 392         spin_lock(&sbi->ll_lock);
 393         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 394         spin_unlock(&sbi->ll_lock);
 395
 396         return count;
 397 }
 398
 399 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 400                                int count, int *eof, void *data)
 401 {
 402         struct super_block     *sb    = data;
 403         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 404         struct cl_client_cache *cache = &sbi->ll_cache;
 405         int shift = 20 - PAGE_CACHE_SHIFT;
 406         int max_cached_mb;
 407         int unused_mb;
 408
 409         *eof = 1;
 410         max_cached_mb = cache->ccc_lru_max >> shift;
 411         unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
 412         return snprintf(page, count,
 413                         "users: %d\n"
 414                         "max_cached_mb: %d\n"
 415                         "used_mb: %d\n"
 416                         "unused_mb: %d\n"
 417                         "reclaim_count: %u\n",
 418                         cfs_atomic_read(&cache->ccc_users),
 419                         max_cached_mb,
 420                         max_cached_mb - unused_mb,
 421                         unused_mb,
 422                         cache->ccc_lru_shrinkers);
 423 }
 424
 425 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 426                                unsigned long count, void *data)
 427 {
 428         struct super_block *sb = data;
 429         struct ll_sb_info *sbi = ll_s2sbi(sb);
 430         struct cl_client_cache *cache = &sbi->ll_cache;
 431         int mult, rc, pages_number;
 432         int diff = 0;
 433         int nrpages = 0;
 434         ENTRY;
 435
 436         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 437         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 438         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 439         if (rc)
 440                 RETURN(rc);
 441
 442         if (pages_number < 0 || pages_number > totalram_pages) {
 443                 CERROR("%s: can't set max cache more than %lu MB\n",
 444                        ll_get_fsname(sb, NULL, 0),
 445                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 446                 RETURN(-ERANGE);
 447         }
 448
 449         if (sbi->ll_dt_exp == NULL) /* being initialized */
 450                 GOTO(out, rc = 0);
 451
 452         spin_lock(&sbi->ll_lock);
 453         diff = pages_number - cache->ccc_lru_max;
 454         spin_unlock(&sbi->ll_lock);
 455
 456         /* easy - add more LRU slots. */
 457         if (diff >= 0) {
 458                 cfs_atomic_add(diff, &cache->ccc_lru_left);
 459                 GOTO(out, rc = 0);
 460         }
 461
 462         diff = -diff;
 463         while (diff > 0) {
 464                 int tmp;
 465
 466                 /* reduce LRU budget from free slots. */
 467                 do {
 468                         int ov, nv;
 469
 470                         ov = cfs_atomic_read(&cache->ccc_lru_left);
 471                         if (ov == 0)
 472                                 break;
 473
 474                         nv = ov > diff ? ov - diff : 0;
 475                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 476                         if (likely(ov == rc)) {
 477                                 diff -= ov - nv;
 478                                 nrpages += ov - nv;
 479                                 break;
 480                         }
 481                 } while (1);
 482
 483                 if (diff <= 0)
 484                         break;
 485
 486                 /* difficult - have to ask OSCs to drop LRU slots. */
 487                 tmp = diff << 1;
 488                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 489                                 sizeof(KEY_CACHE_LRU_SHRINK),
 490                                 KEY_CACHE_LRU_SHRINK,
 491                                 sizeof(tmp), &tmp, NULL);
 492                 if (rc < 0)
 493                         break;
 494         }
 495
 496 out:
 497         if (rc >= 0) {
 498                 spin_lock(&sbi->ll_lock);
 499                 cache->ccc_lru_max = pages_number;
 500                 spin_unlock(&sbi->ll_lock);
 501                 rc = count;
 502         } else {
 503                 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
 504         }
 505         return rc;
 506 }
 507
 508 static int ll_rd_checksum(char *page, char **start, off_t off,
 509                           int count, int *eof, void *data)
 510 {
 511         struct super_block *sb = data;
 512         struct ll_sb_info *sbi = ll_s2sbi(sb);
 513
 514         return snprintf(page, count, "%u\n",
 515                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 516 }
 517
 518 static int ll_wr_checksum(struct file *file, const char *buffer,
 519                           unsigned long count, void *data)
 520 {
 521         struct super_block *sb = data;
 522         struct ll_sb_info *sbi = ll_s2sbi(sb);
 523         int val, rc;
 524
 525         if (!sbi->ll_dt_exp)
 526                 /* Not set up yet */
 527                 return -EAGAIN;
 528
 529         rc = lprocfs_write_helper(buffer, count, &val);
 530         if (rc)
 531                 return rc;
 532         if (val)
 533                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 534         else
 535                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 536
 537         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 538                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 539         if (rc)
 540                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 541
 542         return count;
 543 }
 544
 545 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 546                           int count, int *eof, void *data)
 547 {
 548         struct super_block *sb = data;
 549
 550         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 551 }
 552
 553 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 554                           unsigned long count, void *data)
 555 {
 556         struct super_block *sb = data;
 557         int rc, val;
 558
 559         rc = lprocfs_write_helper(buffer, count, &val);
 560         if (rc)
 561                 return rc;
 562         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 563         return count;
 564 }
 565
 566 static int ll_rd_track_id(char *page, int count, void *data,
 567                           enum stats_track_type type)
 568 {
 569         struct super_block *sb = data;
 570
 571         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 572                 return snprintf(page, count, "%d\n",
 573                                 ll_s2sbi(sb)->ll_stats_track_id);
 574
 575         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 576                 return snprintf(page, count, "0 (all)\n");
 577         } else {
 578                 return snprintf(page, count, "untracked\n");
 579         }
 580 }
 581
 582 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 583                           enum stats_track_type type)
 584 {
 585         struct super_block *sb = data;
 586         int rc, pid;
 587
 588         rc = lprocfs_write_helper(buffer, count, &pid);
 589         if (rc)
 590                 return rc;
 591         ll_s2sbi(sb)->ll_stats_track_id = pid;
 592         if (pid == 0)
 593                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 594         else
 595                 ll_s2sbi(sb)->ll_stats_track_type = type;
 596         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 597         return count;
 598 }
 599
 600 static int ll_rd_track_pid(char *page, char **start, off_t off,
 601                           int count, int *eof, void *data)
 602 {
 603         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 604 }
 605
 606 static int ll_wr_track_pid(struct file *file, const char *buffer,
 607                           unsigned long count, void *data)
 608 {
 609         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 610 }
 611
 612 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 613                           int count, int *eof, void *data)
 614 {
 615         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 616 }
 617
 618 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 619                           unsigned long count, void *data)
 620 {
 621         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 622 }
 623
 624 static int ll_rd_track_gid(char *page, char **start, off_t off,
 625                           int count, int *eof, void *data)
 626 {
 627         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 628 }
 629
 630 static int ll_wr_track_gid(struct file *file, const char *buffer,
 631                           unsigned long count, void *data)
 632 {
 633         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 634 }
 635
 636 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 637                                int count, int *eof, void *data)
 638 {
 639         struct super_block *sb = data;
 640         struct ll_sb_info *sbi = ll_s2sbi(sb);
 641
 642         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 643 }
 644
 645 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 646                                unsigned long count, void *data)
 647 {
 648         struct super_block *sb = data;
 649         struct ll_sb_info *sbi = ll_s2sbi(sb);
 650         int val, rc;
 651
 652         rc = lprocfs_write_helper(buffer, count, &val);
 653         if (rc)
 654                 return rc;
 655
 656         if (val >= 0 && val <= LL_SA_RPC_MAX)
 657                 sbi->ll_sa_max = val;
 658         else
 659                 CERROR("Bad statahead_max value %d. Valid values are in the "
 660                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 661
 662         return count;
 663 }
 664
 665 static int ll_rd_statahead_agl(char *page, char **start, off_t off,
 666                                int count, int *eof, void *data)
 667 {
 668         struct super_block *sb = data;
 669         struct ll_sb_info *sbi = ll_s2sbi(sb);
 670
 671         return snprintf(page, count, "%u\n",
 672                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 673 }
 674
 675 static int ll_wr_statahead_agl(struct file *file, const char *buffer,
 676                                unsigned long count, void *data)
 677 {
 678         struct super_block *sb = data;
 679         struct ll_sb_info *sbi = ll_s2sbi(sb);
 680         int val, rc;
 681
 682         rc = lprocfs_write_helper(buffer, count, &val);
 683         if (rc)
 684                 return rc;
 685
 686         if (val)
 687                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 688         else
 689                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 690
 691         return count;
 692 }
 693
 694 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 695                                  int count, int *eof, void *data)
 696 {
 697         struct super_block *sb = data;
 698         struct ll_sb_info *sbi = ll_s2sbi(sb);
 699
 700         return snprintf(page, count,
 701                         "statahead total: %u\n"
 702                         "statahead wrong: %u\n"
 703                         "agl total: %u\n",
 704                         atomic_read(&sbi->ll_sa_total),
 705                         atomic_read(&sbi->ll_sa_wrong),
 706                         atomic_read(&sbi->ll_agl_total));
 707 }
 708
 709 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 710                             int count, int *eof, void *data)
 711 {
 712         struct super_block *sb = data;
 713         struct ll_sb_info *sbi = ll_s2sbi(sb);
 714
 715         return snprintf(page, count, "%u\n",
 716                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 717 }
 718
 719 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 720                             unsigned long count, void *data)
 721 {
 722         struct super_block *sb = data;
 723         struct ll_sb_info *sbi = ll_s2sbi(sb);
 724         int val, rc;
 725
 726         rc = lprocfs_write_helper(buffer, count, &val);
 727         if (rc)
 728                 return rc;
 729
 730         if (val)
 731                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 732         else
 733                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 734
 735         return count;
 736 }
 737
 738 static int ll_rd_maxea_size(char *page, char **start, off_t off,
 739                             int count, int *eof, void *data)
 740 {
 741         struct super_block *sb = data;
 742         struct ll_sb_info *sbi = ll_s2sbi(sb);
 743         unsigned int ealen;
 744         int rc;
 745
 746         rc = ll_get_max_mdsize(sbi, &ealen);
 747         if (rc)
 748                 return rc;
 749
 750         return snprintf(page, count, "%u\n", ealen);
 751 }
 752
 753 static int ll_rd_sbi_flags(char *page, char **start, off_t off,
 754                                 int count, int *eof, void *data)
 755 {
 756         const char *str[] = LL_SBI_FLAGS;
 757         struct super_block *sb = data;
 758         int flags = ll_s2sbi(sb)->ll_flags;
 759         int i = 0;
 760         int rc = 0;
 761
 762         while (flags != 0) {
 763                 if (ARRAY_SIZE(str) <= i) {
 764                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 765                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 766                         return -EINVAL;
 767                 }
 768
 769                 if (flags & 0x1)
 770                         rc += snprintf(page + rc, count - rc, "%s ", str[i]);
 771                 flags >>= 1;
 772                 ++i;
 773         }
 774         if (rc > 0)
 775                 rc += snprintf(page + rc, count - rc, "\b\n");
 776         return rc;
 777 }
 778
 779 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 780         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 781         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 782         { "fstype",       ll_rd_fstype,           0, 0 },
 783         { "site",         ll_rd_site_stats,       0, 0 },
 784         { "blocksize",    ll_rd_blksize,          0, 0 },
 785         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 786         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 787         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 788         { "filestotal",   ll_rd_filestotal,       0, 0 },
 789         { "filesfree",    ll_rd_filesfree,        0, 0 },
 790         { "client_type",  ll_rd_client_type,      0, 0 },
 791         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 792         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 793                                ll_wr_max_readahead_mb, 0 },
 794         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 795                                         ll_wr_max_readahead_per_file_mb, 0 },
 796         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 797                                      ll_wr_max_read_ahead_whole_mb, 0 },
 798         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 799         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 800         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 801         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 802         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 803         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 804         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 805         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 806         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 807         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 808         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 809         { "sbi_flags",        ll_rd_sbi_flags, 0, 0 },
 810         { "xattr_cache",      ll_rd_xattr_cache, ll_wr_xattr_cache, 0 },
 811         { 0 }
 812 };
 813
 814 #define MAX_STRING_SIZE 128
 815
 816 struct llite_file_opcode {
 817         __u32       opcode;
 818         __u32       type;
 819         const char *opname;
 820 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 821         /* file operation */
 822         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 823         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 824         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 825                                    "read_bytes" },
 826         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 827                                    "write_bytes" },
 828         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 829                                    "brw_read" },
 830         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 831                                    "brw_write" },
 832         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 833                                    "osc_read" },
 834         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 835                                    "osc_write" },
 836         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 837         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 838         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 839         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 840         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 841         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 842         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 843         /* inode operation */
 844         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 845         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 846         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 847         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 848         /* dir inode operation */
 849         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 850         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 851         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 852         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 853         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 854         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 855         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 856         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 857         /* special inode operation */
 858         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 859         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 860         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 861         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 862         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 863         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 864         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 865         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 866 };
 867
 868 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 869 {
 870         if (!sbi->ll_stats)
 871                 return;
 872         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 873                 lprocfs_counter_add(sbi->ll_stats, op, count);
 874         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 875                  sbi->ll_stats_track_id == current->pid)
 876                 lprocfs_counter_add(sbi->ll_stats, op, count);
 877         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 878                  sbi->ll_stats_track_id == current->parent->pid)
 879                 lprocfs_counter_add(sbi->ll_stats, op, count);
 880         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 881                  sbi->ll_stats_track_id == current_gid())
 882                 lprocfs_counter_add(sbi->ll_stats, op, count);
 883 }
 884 EXPORT_SYMBOL(ll_stats_ops_tally);
 885
 886 static const char *ra_stat_string[] = {
 887         [RA_STAT_HIT] = "hits",
 888         [RA_STAT_MISS] = "misses",
 889         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 890         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 891         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 892         [RA_STAT_FAILED_MATCH] = "failed lock match",
 893         [RA_STAT_DISCARDED] = "read but discarded",
 894         [RA_STAT_ZERO_LEN] = "zero length file",
 895         [RA_STAT_ZERO_WINDOW] = "zero size window",
 896         [RA_STAT_EOF] = "read-ahead to EOF",
 897         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 898         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 899 };
 900
 901
 902 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 903                                 struct super_block *sb, char *osc, char *mdc)
 904 {
 905         struct lprocfs_vars lvars[2];
 906         struct lustre_sb_info *lsi = s2lsi(sb);
 907         struct ll_sb_info *sbi = ll_s2sbi(sb);
 908         struct obd_device *obd;
 909         char name[MAX_STRING_SIZE + 1], *ptr;
 910         int err, id, len, rc;
 911         ENTRY;
 912
 913         memset(lvars, 0, sizeof(lvars));
 914
 915         name[MAX_STRING_SIZE] = '\0';
 916         lvars[0].name = name;
 917
 918         LASSERT(sbi != NULL);
 919         LASSERT(mdc != NULL);
 920         LASSERT(osc != NULL);
 921
 922         /* Get fsname */
 923         len = strlen(lsi->lsi_lmd->lmd_profile);
 924         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 925         if (ptr && (strcmp(ptr, "-client") == 0))
 926                 len -= 7;
 927
 928         /* Mount info */
 929         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 930                  lsi->lsi_lmd->lmd_profile, sb);
 931
 932         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 933         if (IS_ERR(sbi->ll_proc_root)) {
 934                 err = PTR_ERR(sbi->ll_proc_root);
 935                 sbi->ll_proc_root = NULL;
 936                 RETURN(err);
 937         }
 938
 939         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 940                                 &vvp_dump_pgcache_file_ops, sbi);
 941         if (rc)
 942                 CWARN("Error adding the dump_page_cache file\n");
 943
 944         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 945                                 &ll_rw_extents_stats_fops, sbi);
 946         if (rc)
 947                 CWARN("Error adding the extent_stats file\n");
 948
 949         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 950                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 951         if (rc)
 952                 CWARN("Error adding the extents_stats_per_process file\n");
 953
 954         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 955                                 &ll_rw_offset_stats_fops, sbi);
 956         if (rc)
 957                 CWARN("Error adding the offset_stats file\n");
 958
 959         /* File operations stats */
 960         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 961                                             LPROCFS_STATS_FLAG_NONE);
 962         if (sbi->ll_stats == NULL)
 963                 GOTO(out, err = -ENOMEM);
 964         /* do counter init */
 965         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 966                 __u32 type = llite_opcode_table[id].type;
 967                 void *ptr = NULL;
 968                 if (type & LPROCFS_TYPE_REGS)
 969                         ptr = "regs";
 970                 else if (type & LPROCFS_TYPE_BYTES)
 971                         ptr = "bytes";
 972                 else if (type & LPROCFS_TYPE_PAGES)
 973                         ptr = "pages";
 974                 lprocfs_counter_init(sbi->ll_stats,
 975                                      llite_opcode_table[id].opcode,
 976                                      (type & LPROCFS_CNTR_AVGMINMAX),
 977                                      llite_opcode_table[id].opname, ptr);
 978         }
 979         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 980         if (err)
 981                 GOTO(out, err);
 982
 983         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 984                                                LPROCFS_STATS_FLAG_NONE);
 985         if (sbi->ll_ra_stats == NULL)
 986                 GOTO(out, err = -ENOMEM);
 987
 988         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 989                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 990                                      ra_stat_string[id], "pages");
 991         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 992                                      sbi->ll_ra_stats);
 993         if (err)
 994                 GOTO(out, err);
 995
 996
 997         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 998         if (err)
 999                 GOTO(out, err);
1000
1001         /* MDC info */
1002         obd = class_name2obd(mdc);
1003
1004         LASSERT(obd != NULL);
1005         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1006         LASSERT(obd->obd_type->typ_name != NULL);
1007
1008         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
1009                  obd->obd_type->typ_name);
1010         lvars[0].read_fptr = lprocfs_rd_name;
1011         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1012         if (err)
1013                 GOTO(out, err);
1014
1015         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1016         lvars[0].read_fptr = lprocfs_rd_uuid;
1017         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1018         if (err)
1019                 GOTO(out, err);
1020
1021         /* OSC */
1022         obd = class_name2obd(osc);
1023
1024         LASSERT(obd != NULL);
1025         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1026         LASSERT(obd->obd_type->typ_name != NULL);
1027
1028         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
1029                  obd->obd_type->typ_name);
1030         lvars[0].read_fptr = lprocfs_rd_name;
1031         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1032         if (err)
1033                 GOTO(out, err);
1034
1035         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1036         lvars[0].read_fptr = lprocfs_rd_uuid;
1037         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1038 out:
1039         if (err) {
1040                 lprocfs_remove(&sbi->ll_proc_root);
1041                 lprocfs_free_stats(&sbi->ll_ra_stats);
1042                 lprocfs_free_stats(&sbi->ll_stats);
1043         }
1044         RETURN(err);
1045 }
1046
1047 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1048 {
1049         if (sbi->ll_proc_root) {
1050                 lprocfs_remove(&sbi->ll_proc_root);
1051                 lprocfs_free_stats(&sbi->ll_ra_stats);
1052                 lprocfs_free_stats(&sbi->ll_stats);
1053         }
1054 }
1055 #undef MAX_STRING_SIZE
1056
1057 #define pct(a,b) (b ? a * 100 / b : 0)
1058
1059 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1060                                    struct seq_file *seq, int which)
1061 {
1062         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1063         unsigned long start, end, r, w;
1064         char *unitp = "KMGTPEZY";
1065         int i, units = 10;
1066         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1067
1068         read_cum = 0;
1069         write_cum = 0;
1070         start = 0;
1071
1072         for(i = 0; i < LL_HIST_MAX; i++) {
1073                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1074                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1075         }
1076
1077         for(i = 0; i < LL_HIST_MAX; i++) {
1078                 r = pp_info->pp_r_hist.oh_buckets[i];
1079                 w = pp_info->pp_w_hist.oh_buckets[i];
1080                 read_cum += r;
1081                 write_cum += w;
1082                 end = 1 << (i + LL_HIST_START - units);
1083                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1084                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1085                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1086                            r, pct(r, read_tot), pct(read_cum, read_tot),
1087                            w, pct(w, write_tot), pct(write_cum, write_tot));
1088                 start = end;
1089                 if (start == 1<<10) {
1090                         start = 1;
1091                         units += 10;
1092                         unitp++;
1093                 }
1094                 if (read_cum == read_tot && write_cum == write_tot)
1095                         break;
1096         }
1097 }
1098
1099 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1100 {
1101         struct timeval now;
1102         struct ll_sb_info *sbi = seq->private;
1103         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1104         int k;
1105
1106         do_gettimeofday(&now);
1107
1108         if (!sbi->ll_rw_stats_on) {
1109                 seq_printf(seq, "disabled\n"
1110                                 "write anything in this file to activate, "
1111                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1112                 return 0;
1113         }
1114         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1115                    now.tv_sec, now.tv_usec);
1116         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1117         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1118                    "extents", "calls", "%", "cum%",
1119                    "calls", "%", "cum%");
1120         spin_lock(&sbi->ll_pp_extent_lock);
1121         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1122                 if (io_extents->pp_extents[k].pid != 0) {
1123                         seq_printf(seq, "\nPID: %d\n",
1124                                    io_extents->pp_extents[k].pid);
1125                         ll_display_extents_info(io_extents, seq, k);
1126                 }
1127         }
1128         spin_unlock(&sbi->ll_pp_extent_lock);
1129         return 0;
1130 }
1131
1132 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1133                                                 const char *buf, size_t len,
1134                                                 loff_t *off)
1135 {
1136         struct seq_file *seq = file->private_data;
1137         struct ll_sb_info *sbi = seq->private;
1138         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1139         int i;
1140         int value = 1, rc = 0;
1141
1142         rc = lprocfs_write_helper(buf, len, &value);
1143         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1144                        strcmp(buf, "Disabled") == 0))
1145                 value = 0;
1146
1147         if (value == 0)
1148                 sbi->ll_rw_stats_on = 0;
1149         else
1150                 sbi->ll_rw_stats_on = 1;
1151
1152         spin_lock(&sbi->ll_pp_extent_lock);
1153         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1154                 io_extents->pp_extents[i].pid = 0;
1155                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1156                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1157         }
1158         spin_unlock(&sbi->ll_pp_extent_lock);
1159         return len;
1160 }
1161
1162 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1163
1164 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1165 {
1166         struct timeval now;
1167         struct ll_sb_info *sbi = seq->private;
1168         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1169
1170         do_gettimeofday(&now);
1171
1172         if (!sbi->ll_rw_stats_on) {
1173                 seq_printf(seq, "disabled\n"
1174                                 "write anything in this file to activate, "
1175                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1176                 return 0;
1177         }
1178         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1179                    now.tv_sec, now.tv_usec);
1180
1181         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1182         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1183                    "extents", "calls", "%", "cum%",
1184                    "calls", "%", "cum%");
1185         spin_lock(&sbi->ll_lock);
1186         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1187         spin_unlock(&sbi->ll_lock);
1188
1189         return 0;
1190 }
1191
1192 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1193                                         size_t len, loff_t *off)
1194 {
1195         struct seq_file *seq = file->private_data;
1196         struct ll_sb_info *sbi = seq->private;
1197         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1198         int i;
1199         int value = 1, rc = 0;
1200
1201         rc = lprocfs_write_helper(buf, len, &value);
1202         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1203                        strcmp(buf, "Disabled") == 0))
1204                 value = 0;
1205
1206         if (value == 0)
1207                 sbi->ll_rw_stats_on = 0;
1208         else
1209                 sbi->ll_rw_stats_on = 1;
1210         spin_lock(&sbi->ll_pp_extent_lock);
1211         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1212                 io_extents->pp_extents[i].pid = 0;
1213                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1214                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1215         }
1216         spin_unlock(&sbi->ll_pp_extent_lock);
1217
1218         return len;
1219 }
1220
1221 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1222
1223 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1224                        struct ll_file_data *file, loff_t pos,
1225                        size_t count, int rw)
1226 {
1227         int i, cur = -1;
1228         struct ll_rw_process_info *process;
1229         struct ll_rw_process_info *offset;
1230         int *off_count = &sbi->ll_rw_offset_entry_count;
1231         int *process_count = &sbi->ll_offset_process_count;
1232         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1233
1234         if(!sbi->ll_rw_stats_on)
1235                 return;
1236         process = sbi->ll_rw_process_info;
1237         offset = sbi->ll_rw_offset_info;
1238
1239         spin_lock(&sbi->ll_pp_extent_lock);
1240         /* Extent statistics */
1241         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1242                 if(io_extents->pp_extents[i].pid == pid) {
1243                         cur = i;
1244                         break;
1245                 }
1246         }
1247
1248         if (cur == -1) {
1249                 /* new process */
1250                 sbi->ll_extent_process_count =
1251                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1252                 cur = sbi->ll_extent_process_count;
1253                 io_extents->pp_extents[cur].pid = pid;
1254                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1255                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1256         }
1257
1258         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1259              (i < (LL_HIST_MAX - 1)); i++);
1260         if (rw == 0) {
1261                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1262                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1263         } else {
1264                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1265                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1266         }
1267         spin_unlock(&sbi->ll_pp_extent_lock);
1268
1269         spin_lock(&sbi->ll_process_lock);
1270         /* Offset statistics */
1271         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1272                 if (process[i].rw_pid == pid) {
1273                         if (process[i].rw_last_file != file) {
1274                                 process[i].rw_range_start = pos;
1275                                 process[i].rw_last_file_pos = pos + count;
1276                                 process[i].rw_smallest_extent = count;
1277                                 process[i].rw_largest_extent = count;
1278                                 process[i].rw_offset = 0;
1279                                 process[i].rw_last_file = file;
1280                                 spin_unlock(&sbi->ll_process_lock);
1281                                 return;
1282                         }
1283                         if (process[i].rw_last_file_pos != pos) {
1284                                 *off_count =
1285                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1286                                 offset[*off_count].rw_op = process[i].rw_op;
1287                                 offset[*off_count].rw_pid = pid;
1288                                 offset[*off_count].rw_range_start =
1289                                         process[i].rw_range_start;
1290                                 offset[*off_count].rw_range_end =
1291                                         process[i].rw_last_file_pos;
1292                                 offset[*off_count].rw_smallest_extent =
1293                                         process[i].rw_smallest_extent;
1294                                 offset[*off_count].rw_largest_extent =
1295                                         process[i].rw_largest_extent;
1296                                 offset[*off_count].rw_offset =
1297                                         process[i].rw_offset;
1298                                 process[i].rw_op = rw;
1299                                 process[i].rw_range_start = pos;
1300                                 process[i].rw_smallest_extent = count;
1301                                 process[i].rw_largest_extent = count;
1302                                 process[i].rw_offset = pos -
1303                                         process[i].rw_last_file_pos;
1304                         }
1305                         if(process[i].rw_smallest_extent > count)
1306                                 process[i].rw_smallest_extent = count;
1307                         if(process[i].rw_largest_extent < count)
1308                                 process[i].rw_largest_extent = count;
1309                         process[i].rw_last_file_pos = pos + count;
1310                         spin_unlock(&sbi->ll_process_lock);
1311                         return;
1312                 }
1313         }
1314         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1315         process[*process_count].rw_pid = pid;
1316         process[*process_count].rw_op = rw;
1317         process[*process_count].rw_range_start = pos;
1318         process[*process_count].rw_last_file_pos = pos + count;
1319         process[*process_count].rw_smallest_extent = count;
1320         process[*process_count].rw_largest_extent = count;
1321         process[*process_count].rw_offset = 0;
1322         process[*process_count].rw_last_file = file;
1323         spin_unlock(&sbi->ll_process_lock);
1324 }
1325
1326 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1327 {
1328         struct timeval now;
1329         struct ll_sb_info *sbi = seq->private;
1330         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1331         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1332         int i;
1333
1334         do_gettimeofday(&now);
1335
1336         if (!sbi->ll_rw_stats_on) {
1337                 seq_printf(seq, "disabled\n"
1338                                 "write anything in this file to activate, "
1339                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1340                 return 0;
1341         }
1342         spin_lock(&sbi->ll_process_lock);
1343
1344         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1345                    now.tv_sec, now.tv_usec);
1346         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1347                    "R/W", "PID", "RANGE START", "RANGE END",
1348                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1349
1350         /* We stored the discontiguous offsets here; print them first */
1351         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1352                 if (offset[i].rw_pid != 0)
1353                         seq_printf(seq,
1354                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1355                                    offset[i].rw_op == READ ? 'R' : 'W',
1356                                    offset[i].rw_pid,
1357                                    offset[i].rw_range_start,
1358                                    offset[i].rw_range_end,
1359                                    (unsigned long)offset[i].rw_smallest_extent,
1360                                    (unsigned long)offset[i].rw_largest_extent,
1361                                    offset[i].rw_offset);
1362         }
1363
1364         /* Then print the current offsets for each process */
1365         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1366                 if (process[i].rw_pid != 0)
1367                         seq_printf(seq,
1368                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1369                                    process[i].rw_op == READ ? 'R' : 'W',
1370                                    process[i].rw_pid,
1371                                    process[i].rw_range_start,
1372                                    process[i].rw_last_file_pos,
1373                                    (unsigned long)process[i].rw_smallest_extent,
1374                                    (unsigned long)process[i].rw_largest_extent,
1375                                    process[i].rw_offset);
1376         }
1377         spin_unlock(&sbi->ll_process_lock);
1378
1379         return 0;
1380 }
1381
1382 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1383                                        size_t len, loff_t *off)
1384 {
1385         struct seq_file *seq = file->private_data;
1386         struct ll_sb_info *sbi = seq->private;
1387         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1388         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1389         int value = 1, rc = 0;
1390
1391         rc = lprocfs_write_helper(buf, len, &value);
1392
1393         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1394                            strcmp(buf, "Disabled") == 0))
1395                 value = 0;
1396
1397         if (value == 0)
1398                 sbi->ll_rw_stats_on = 0;
1399         else
1400                 sbi->ll_rw_stats_on = 1;
1401
1402         spin_lock(&sbi->ll_process_lock);
1403         sbi->ll_offset_process_count = 0;
1404         sbi->ll_rw_offset_entry_count = 0;
1405         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1406                LL_PROCESS_HIST_MAX);
1407         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1408                LL_OFFSET_HIST_MAX);
1409         spin_unlock(&sbi->ll_process_lock);
1410
1411         return len;
1412 }
1413
1414 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1415
1416 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1417 {
1418     lvars->module_vars  = NULL;
1419     lvars->obd_vars     = lprocfs_llite_obd_vars;
1420 }
1421 #endif /* LPROCFS */