drivers/staging/lustre/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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32 #define DEBUG_SUBSYSTEM S_LLITE
  33
  34 #include "../include/lustre_lite.h"
  35 #include "../include/lprocfs_status.h"
  36 #include <linux/seq_file.h>
  37 #include "../include/obd_support.h"
  38
  39 #include "llite_internal.h"
  40 #include "vvp_internal.h"
  41
  42 /* debugfs llite mount point registration */
  43 static struct file_operations ll_rw_extents_stats_fops;
  44 static struct file_operations ll_rw_extents_stats_pp_fops;
  45 static struct file_operations ll_rw_offset_stats_fops;
  46
  47 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
  48                               char *buf)
  49 {
  50         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
  51                                               ll_kobj);
  52         struct obd_statfs osfs;
  53         int rc;
  54
  55         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
  56                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  57                                 OBD_STATFS_NODELAY);
  58         if (!rc)
  59                 return sprintf(buf, "%u\n", osfs.os_bsize);
  60
  61         return rc;
  62 }
  63 LUSTRE_RO_ATTR(blocksize);
  64
  65 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
  66                                 char *buf)
  67 {
  68         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
  69                                               ll_kobj);
  70         struct obd_statfs osfs;
  71         int rc;
  72
  73         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
  74                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  75                                 OBD_STATFS_NODELAY);
  76         if (!rc) {
  77                 __u32 blk_size = osfs.os_bsize >> 10;
  78                 __u64 result = osfs.os_blocks;
  79
  80                 while (blk_size >>= 1)
  81                         result <<= 1;
  82
  83                 rc = sprintf(buf, "%llu\n", result);
  84         }
  85
  86         return rc;
  87 }
  88 LUSTRE_RO_ATTR(kbytestotal);
  89
  90 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
  91                                char *buf)
  92 {
  93         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
  94                                               ll_kobj);
  95         struct obd_statfs osfs;
  96         int rc;
  97
  98         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
  99                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 100                                 OBD_STATFS_NODELAY);
 101         if (!rc) {
 102                 __u32 blk_size = osfs.os_bsize >> 10;
 103                 __u64 result = osfs.os_bfree;
 104
 105                 while (blk_size >>= 1)
 106                         result <<= 1;
 107
 108                 rc = sprintf(buf, "%llu\n", result);
 109         }
 110
 111         return rc;
 112 }
 113 LUSTRE_RO_ATTR(kbytesfree);
 114
 115 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
 116                                 char *buf)
 117 {
 118         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 119                                               ll_kobj);
 120         struct obd_statfs osfs;
 121         int rc;
 122
 123         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
 124                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 125                                 OBD_STATFS_NODELAY);
 126         if (!rc) {
 127                 __u32 blk_size = osfs.os_bsize >> 10;
 128                 __u64 result = osfs.os_bavail;
 129
 130                 while (blk_size >>= 1)
 131                         result <<= 1;
 132
 133                 rc = sprintf(buf, "%llu\n", result);
 134         }
 135
 136         return rc;
 137 }
 138 LUSTRE_RO_ATTR(kbytesavail);
 139
 140 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
 141                                char *buf)
 142 {
 143         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 144                                               ll_kobj);
 145         struct obd_statfs osfs;
 146         int rc;
 147
 148         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
 149                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 150                                 OBD_STATFS_NODELAY);
 151         if (!rc)
 152                 return sprintf(buf, "%llu\n", osfs.os_files);
 153
 154         return rc;
 155 }
 156 LUSTRE_RO_ATTR(filestotal);
 157
 158 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
 159                               char *buf)
 160 {
 161         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 162                                               ll_kobj);
 163         struct obd_statfs osfs;
 164         int rc;
 165
 166         rc = ll_statfs_internal(sbi->ll_sb, &osfs,
 167                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 168                                 OBD_STATFS_NODELAY);
 169         if (!rc)
 170                 return sprintf(buf, "%llu\n", osfs.os_ffree);
 171
 172         return rc;
 173 }
 174 LUSTRE_RO_ATTR(filesfree);
 175
 176 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
 177                                 char *buf)
 178 {
 179         return sprintf(buf, "local client\n");
 180 }
 181 LUSTRE_RO_ATTR(client_type);
 182
 183 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
 184                            char *buf)
 185 {
 186         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 187                                               ll_kobj);
 188
 189         return sprintf(buf, "%s\n", sbi->ll_sb->s_type->name);
 190 }
 191 LUSTRE_RO_ATTR(fstype);
 192
 193 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
 194                          char *buf)
 195 {
 196         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 197                                               ll_kobj);
 198
 199         return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
 200 }
 201 LUSTRE_RO_ATTR(uuid);
 202
 203 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 204 {
 205         struct super_block *sb = m->private;
 206
 207         /*
 208          * See description of statistical counters in struct cl_site, and
 209          * struct lu_site.
 210          */
 211         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 212 }
 213
 214 LPROC_SEQ_FOPS_RO(ll_site_stats);
 215
 216 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
 217                                       struct attribute *attr, char *buf)
 218 {
 219         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 220                                               ll_kobj);
 221         long pages_number;
 222         int mult;
 223
 224         spin_lock(&sbi->ll_lock);
 225         pages_number = sbi->ll_ra_info.ra_max_pages;
 226         spin_unlock(&sbi->ll_lock);
 227
 228         mult = 1 << (20 - PAGE_SHIFT);
 229         return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
 230 }
 231
 232 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
 233                                        struct attribute *attr,
 234                                        const char *buffer,
 235                                        size_t count)
 236 {
 237         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 238                                               ll_kobj);
 239         int rc;
 240         unsigned long pages_number;
 241
 242         rc = kstrtoul(buffer, 10, &pages_number);
 243         if (rc)
 244                 return rc;
 245
 246         pages_number *= 1 << (20 - PAGE_SHIFT); /* MB -> pages */
 247
 248         if (pages_number > totalram_pages / 2) {
 249                 CERROR("can't set file readahead more than %lu MB\n",
 250                        totalram_pages >> (20 - PAGE_SHIFT + 1)); /*1/2 of RAM*/
 251                 return -ERANGE;
 252         }
 253
 254         spin_lock(&sbi->ll_lock);
 255         sbi->ll_ra_info.ra_max_pages = pages_number;
 256         spin_unlock(&sbi->ll_lock);
 257
 258         return count;
 259 }
 260 LUSTRE_RW_ATTR(max_read_ahead_mb);
 261
 262 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
 263                                                struct attribute *attr,
 264                                                char *buf)
 265 {
 266         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 267                                               ll_kobj);
 268         long pages_number;
 269         int mult;
 270
 271         spin_lock(&sbi->ll_lock);
 272         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 273         spin_unlock(&sbi->ll_lock);
 274
 275         mult = 1 << (20 - PAGE_SHIFT);
 276         return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
 277 }
 278
 279 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
 280                                                 struct attribute *attr,
 281                                                 const char *buffer,
 282                                                 size_t count)
 283 {
 284         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 285                                               ll_kobj);
 286         int rc;
 287         unsigned long pages_number;
 288
 289         rc = kstrtoul(buffer, 10, &pages_number);
 290         if (rc)
 291                 return rc;
 292
 293         if (pages_number > sbi->ll_ra_info.ra_max_pages) {
 294                 CERROR("can't set file readahead more than max_read_ahead_mb %lu MB\n",
 295                        sbi->ll_ra_info.ra_max_pages);
 296                 return -ERANGE;
 297         }
 298
 299         spin_lock(&sbi->ll_lock);
 300         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 301         spin_unlock(&sbi->ll_lock);
 302
 303         return count;
 304 }
 305 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
 306
 307 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
 308                                             struct attribute *attr,
 309                                             char *buf)
 310 {
 311         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 312                                               ll_kobj);
 313         long pages_number;
 314         int mult;
 315
 316         spin_lock(&sbi->ll_lock);
 317         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 318         spin_unlock(&sbi->ll_lock);
 319
 320         mult = 1 << (20 - PAGE_SHIFT);
 321         return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
 322 }
 323
 324 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
 325                                              struct attribute *attr,
 326                                              const char  *buffer,
 327                                              size_t count)
 328 {
 329         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 330                                               ll_kobj);
 331         int rc;
 332         unsigned long pages_number;
 333
 334         rc = kstrtoul(buffer, 10, &pages_number);
 335         if (rc)
 336                 return rc;
 337
 338         /* Cap this at the current max readahead window size, the readahead
 339          * algorithm does this anyway so it's pointless to set it larger.
 340          */
 341         if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 342                 CERROR("can't set max_read_ahead_whole_mb more than max_read_ahead_per_file_mb: %lu\n",
 343                        sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_SHIFT));
 344                 return -ERANGE;
 345         }
 346
 347         spin_lock(&sbi->ll_lock);
 348         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 349         spin_unlock(&sbi->ll_lock);
 350
 351         return count;
 352 }
 353 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
 354
 355 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 356 {
 357         struct super_block     *sb    = m->private;
 358         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 359         struct cl_client_cache *cache = sbi->ll_cache;
 360         int shift = 20 - PAGE_SHIFT;
 361         int max_cached_mb;
 362         int unused_mb;
 363
 364         max_cached_mb = cache->ccc_lru_max >> shift;
 365         unused_mb = atomic_read(&cache->ccc_lru_left) >> shift;
 366         seq_printf(m,
 367                    "users: %d\n"
 368                    "max_cached_mb: %d\n"
 369                    "used_mb: %d\n"
 370                    "unused_mb: %d\n"
 371                    "reclaim_count: %u\n",
 372                    atomic_read(&cache->ccc_users),
 373                    max_cached_mb,
 374                    max_cached_mb - unused_mb,
 375                    unused_mb,
 376                    cache->ccc_lru_shrinkers);
 377         return 0;
 378 }
 379
 380 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 381                                           const char __user *buffer,
 382                                           size_t count, loff_t *off)
 383 {
 384         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 385         struct ll_sb_info *sbi = ll_s2sbi(sb);
 386         struct cl_client_cache *cache = sbi->ll_cache;
 387         struct lu_env *env;
 388         int refcheck;
 389         int mult, rc, pages_number;
 390         int diff = 0;
 391         int nrpages = 0;
 392         char kernbuf[128];
 393
 394         if (count >= sizeof(kernbuf))
 395                 return -EINVAL;
 396
 397         if (copy_from_user(kernbuf, buffer, count))
 398                 return -EFAULT;
 399         kernbuf[count] = 0;
 400
 401         mult = 1 << (20 - PAGE_SHIFT);
 402         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 403                   kernbuf;
 404         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 405         if (rc)
 406                 return rc;
 407
 408         if (pages_number < 0 || pages_number > totalram_pages) {
 409                 CERROR("%s: can't set max cache more than %lu MB\n",
 410                        ll_get_fsname(sb, NULL, 0),
 411                        totalram_pages >> (20 - PAGE_SHIFT));
 412                 return -ERANGE;
 413         }
 414
 415         spin_lock(&sbi->ll_lock);
 416         diff = pages_number - cache->ccc_lru_max;
 417         spin_unlock(&sbi->ll_lock);
 418
 419         /* easy - add more LRU slots. */
 420         if (diff >= 0) {
 421                 atomic_add(diff, &cache->ccc_lru_left);
 422                 rc = 0;
 423                 goto out;
 424         }
 425
 426         env = cl_env_get(&refcheck);
 427         if (IS_ERR(env))
 428                 return 0;
 429
 430         diff = -diff;
 431         while (diff > 0) {
 432                 int tmp;
 433
 434                 /* reduce LRU budget from free slots. */
 435                 do {
 436                         int ov, nv;
 437
 438                         ov = atomic_read(&cache->ccc_lru_left);
 439                         if (ov == 0)
 440                                 break;
 441
 442                         nv = ov > diff ? ov - diff : 0;
 443                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 444                         if (likely(ov == rc)) {
 445                                 diff -= ov - nv;
 446                                 nrpages += ov - nv;
 447                                 break;
 448                         }
 449                 } while (1);
 450
 451                 if (diff <= 0)
 452                         break;
 453
 454                 if (!sbi->ll_dt_exp) { /* being initialized */
 455                         rc = 0;
 456                         goto out;
 457                 }
 458
 459                 /* difficult - have to ask OSCs to drop LRU slots. */
 460                 tmp = diff << 1;
 461                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 462                                         sizeof(KEY_CACHE_LRU_SHRINK),
 463                                         KEY_CACHE_LRU_SHRINK,
 464                                         sizeof(tmp), &tmp, NULL);
 465                 if (rc < 0)
 466                         break;
 467         }
 468         cl_env_put(env, &refcheck);
 469
 470 out:
 471         if (rc >= 0) {
 472                 spin_lock(&sbi->ll_lock);
 473                 cache->ccc_lru_max = pages_number;
 474                 spin_unlock(&sbi->ll_lock);
 475                 rc = count;
 476         } else {
 477                 atomic_add(nrpages, &cache->ccc_lru_left);
 478         }
 479         return rc;
 480 }
 481
 482 LPROC_SEQ_FOPS(ll_max_cached_mb);
 483
 484 static ssize_t checksum_pages_show(struct kobject *kobj, struct attribute *attr,
 485                                    char *buf)
 486 {
 487         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 488                                               ll_kobj);
 489
 490         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 491 }
 492
 493 static ssize_t checksum_pages_store(struct kobject *kobj,
 494                                     struct attribute *attr,
 495                                     const char *buffer,
 496                                     size_t count)
 497 {
 498         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 499                                               ll_kobj);
 500         int rc;
 501         unsigned long val;
 502
 503         if (!sbi->ll_dt_exp)
 504                 /* Not set up yet */
 505                 return -EAGAIN;
 506
 507         rc = kstrtoul(buffer, 10, &val);
 508         if (rc)
 509                 return rc;
 510         if (val)
 511                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 512         else
 513                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 514
 515         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 516                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 517         if (rc)
 518                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 519
 520         return count;
 521 }
 522 LUSTRE_RW_ATTR(checksum_pages);
 523
 524 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
 525                               enum stats_track_type type)
 526 {
 527         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 528                                               ll_kobj);
 529
 530         if (sbi->ll_stats_track_type == type)
 531                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
 532         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 533                 return sprintf(buf, "0 (all)\n");
 534         else
 535                 return sprintf(buf, "untracked\n");
 536 }
 537
 538 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
 539                               size_t count,
 540                               enum stats_track_type type)
 541 {
 542         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 543                                               ll_kobj);
 544         int rc;
 545         unsigned long pid;
 546
 547         rc = kstrtoul(buffer, 10, &pid);
 548         if (rc)
 549                 return rc;
 550         sbi->ll_stats_track_id = pid;
 551         if (pid == 0)
 552                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
 553         else
 554                 sbi->ll_stats_track_type = type;
 555         lprocfs_clear_stats(sbi->ll_stats);
 556         return count;
 557 }
 558
 559 static ssize_t stats_track_pid_show(struct kobject *kobj,
 560                                     struct attribute *attr,
 561                                     char *buf)
 562 {
 563         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
 564 }
 565
 566 static ssize_t stats_track_pid_store(struct kobject *kobj,
 567                                      struct attribute *attr,
 568                                      const char *buffer,
 569                                      size_t count)
 570 {
 571         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
 572 }
 573 LUSTRE_RW_ATTR(stats_track_pid);
 574
 575 static ssize_t stats_track_ppid_show(struct kobject *kobj,
 576                                      struct attribute *attr,
 577                                      char *buf)
 578 {
 579         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
 580 }
 581
 582 static ssize_t stats_track_ppid_store(struct kobject *kobj,
 583                                       struct attribute *attr,
 584                                       const char *buffer,
 585                                       size_t count)
 586 {
 587         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
 588 }
 589 LUSTRE_RW_ATTR(stats_track_ppid);
 590
 591 static ssize_t stats_track_gid_show(struct kobject *kobj,
 592                                     struct attribute *attr,
 593                                     char *buf)
 594 {
 595         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
 596 }
 597
 598 static ssize_t stats_track_gid_store(struct kobject *kobj,
 599                                      struct attribute *attr,
 600                                      const char *buffer,
 601                                      size_t count)
 602 {
 603         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
 604 }
 605 LUSTRE_RW_ATTR(stats_track_gid);
 606
 607 static ssize_t statahead_max_show(struct kobject *kobj,
 608                                   struct attribute *attr,
 609                                   char *buf)
 610 {
 611         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 612                                               ll_kobj);
 613
 614         return sprintf(buf, "%u\n", sbi->ll_sa_max);
 615 }
 616
 617 static ssize_t statahead_max_store(struct kobject *kobj,
 618                                    struct attribute *attr,
 619                                    const char *buffer,
 620                                    size_t count)
 621 {
 622         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 623                                               ll_kobj);
 624         int rc;
 625         unsigned long val;
 626
 627         rc = kstrtoul(buffer, 10, &val);
 628         if (rc)
 629                 return rc;
 630
 631         if (val <= LL_SA_RPC_MAX)
 632                 sbi->ll_sa_max = val;
 633         else
 634                 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
 635                        val, LL_SA_RPC_MAX);
 636
 637         return count;
 638 }
 639 LUSTRE_RW_ATTR(statahead_max);
 640
 641 static ssize_t statahead_agl_show(struct kobject *kobj,
 642                                   struct attribute *attr,
 643                                   char *buf)
 644 {
 645         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 646                                               ll_kobj);
 647
 648         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 649 }
 650
 651 static ssize_t statahead_agl_store(struct kobject *kobj,
 652                                    struct attribute *attr,
 653                                    const char *buffer,
 654                                    size_t count)
 655 {
 656         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 657                                               ll_kobj);
 658         int rc;
 659         unsigned long val;
 660
 661         rc = kstrtoul(buffer, 10, &val);
 662         if (rc)
 663                 return rc;
 664
 665         if (val)
 666                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 667         else
 668                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 669
 670         return count;
 671 }
 672 LUSTRE_RW_ATTR(statahead_agl);
 673
 674 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 675 {
 676         struct super_block *sb = m->private;
 677         struct ll_sb_info *sbi = ll_s2sbi(sb);
 678
 679         seq_printf(m,
 680                    "statahead total: %u\n"
 681                    "statahead wrong: %u\n"
 682                    "agl total: %u\n",
 683                    atomic_read(&sbi->ll_sa_total),
 684                    atomic_read(&sbi->ll_sa_wrong),
 685                    atomic_read(&sbi->ll_agl_total));
 686         return 0;
 687 }
 688
 689 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 690
 691 static ssize_t lazystatfs_show(struct kobject *kobj,
 692                                struct attribute *attr,
 693                                char *buf)
 694 {
 695         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 696                                               ll_kobj);
 697
 698         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_LAZYSTATFS ? 1 : 0);
 699 }
 700
 701 static ssize_t lazystatfs_store(struct kobject *kobj,
 702                                 struct attribute *attr,
 703                                 const char *buffer,
 704                                 size_t count)
 705 {
 706         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 707                                               ll_kobj);
 708         int rc;
 709         unsigned long val;
 710
 711         rc = kstrtoul(buffer, 10, &val);
 712         if (rc)
 713                 return rc;
 714
 715         if (val)
 716                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 717         else
 718                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 719
 720         return count;
 721 }
 722 LUSTRE_RW_ATTR(lazystatfs);
 723
 724 static ssize_t max_easize_show(struct kobject *kobj,
 725                                struct attribute *attr,
 726                                char *buf)
 727 {
 728         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 729                                               ll_kobj);
 730         unsigned int ealen;
 731         int rc;
 732
 733         rc = ll_get_max_mdsize(sbi, &ealen);
 734         if (rc)
 735                 return rc;
 736
 737         return sprintf(buf, "%u\n", ealen);
 738 }
 739 LUSTRE_RO_ATTR(max_easize);
 740
 741 static ssize_t default_easize_show(struct kobject *kobj,
 742                                    struct attribute *attr,
 743                                    char *buf)
 744 {
 745         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 746                                               ll_kobj);
 747         unsigned int ealen;
 748         int rc;
 749
 750         rc = ll_get_default_mdsize(sbi, &ealen);
 751         if (rc)
 752                 return rc;
 753
 754         return sprintf(buf, "%u\n", ealen);
 755 }
 756 LUSTRE_RO_ATTR(default_easize);
 757
 758 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 759 {
 760         const char *str[] = LL_SBI_FLAGS;
 761         struct super_block *sb = m->private;
 762         int flags = ll_s2sbi(sb)->ll_flags;
 763         int i = 0;
 764
 765         while (flags != 0) {
 766                 if (ARRAY_SIZE(str) <= i) {
 767                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi flags please.\n",
 768                                ll_get_fsname(sb, NULL, 0));
 769                         return -EINVAL;
 770                 }
 771
 772                 if (flags & 0x1)
 773                         seq_printf(m, "%s ", str[i]);
 774                 flags >>= 1;
 775                 ++i;
 776         }
 777         seq_printf(m, "\b\n");
 778         return 0;
 779 }
 780
 781 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 782
 783 static ssize_t xattr_cache_show(struct kobject *kobj,
 784                                 struct attribute *attr,
 785                                 char *buf)
 786 {
 787         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 788                                               ll_kobj);
 789
 790         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
 791 }
 792
 793 static ssize_t xattr_cache_store(struct kobject *kobj,
 794                                  struct attribute *attr,
 795                                  const char *buffer,
 796                                  size_t count)
 797 {
 798         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 799                                               ll_kobj);
 800         int rc;
 801         unsigned long val;
 802
 803         rc = kstrtoul(buffer, 10, &val);
 804         if (rc)
 805                 return rc;
 806
 807         if (val != 0 && val != 1)
 808                 return -ERANGE;
 809
 810         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 811                 return -ENOTSUPP;
 812
 813         sbi->ll_xattr_cache_enabled = val;
 814
 815         return count;
 816 }
 817 LUSTRE_RW_ATTR(xattr_cache);
 818
 819 static ssize_t unstable_stats_show(struct kobject *kobj,
 820                                    struct attribute *attr,
 821                                    char *buf)
 822 {
 823         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 824                                               ll_kobj);
 825         struct cl_client_cache *cache = sbi->ll_cache;
 826         int pages, mb;
 827
 828         pages = atomic_read(&cache->ccc_unstable_nr);
 829         mb = (pages * PAGE_SIZE) >> 20;
 830
 831         return sprintf(buf, "unstable_pages: %8d\n"
 832                             "unstable_mb:    %8d\n", pages, mb);
 833 }
 834 LUSTRE_RO_ATTR(unstable_stats);
 835
 836 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 837         /* { "mntpt_path",   ll_rd_path,             0, 0 }, */
 838         { "site",         &ll_site_stats_fops,    NULL, 0 },
 839         /* { "filegroups",   lprocfs_rd_filegroups,  0, 0 }, */
 840         { "max_cached_mb",    &ll_max_cached_mb_fops, NULL },
 841         { "statahead_stats",  &ll_statahead_stats_fops, NULL, 0 },
 842         { "sbi_flags",        &ll_sbi_flags_fops, NULL, 0 },
 843         { NULL }
 844 };
 845
 846 #define MAX_STRING_SIZE 128
 847
 848 static struct attribute *llite_attrs[] = {
 849         &lustre_attr_blocksize.attr,
 850         &lustre_attr_kbytestotal.attr,
 851         &lustre_attr_kbytesfree.attr,
 852         &lustre_attr_kbytesavail.attr,
 853         &lustre_attr_filestotal.attr,
 854         &lustre_attr_filesfree.attr,
 855         &lustre_attr_client_type.attr,
 856         &lustre_attr_fstype.attr,
 857         &lustre_attr_uuid.attr,
 858         &lustre_attr_max_read_ahead_mb.attr,
 859         &lustre_attr_max_read_ahead_per_file_mb.attr,
 860         &lustre_attr_max_read_ahead_whole_mb.attr,
 861         &lustre_attr_checksum_pages.attr,
 862         &lustre_attr_stats_track_pid.attr,
 863         &lustre_attr_stats_track_ppid.attr,
 864         &lustre_attr_stats_track_gid.attr,
 865         &lustre_attr_statahead_max.attr,
 866         &lustre_attr_statahead_agl.attr,
 867         &lustre_attr_lazystatfs.attr,
 868         &lustre_attr_max_easize.attr,
 869         &lustre_attr_default_easize.attr,
 870         &lustre_attr_xattr_cache.attr,
 871         &lustre_attr_unstable_stats.attr,
 872         NULL,
 873 };
 874
 875 static void llite_sb_release(struct kobject *kobj)
 876 {
 877         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 878                                               ll_kobj);
 879         complete(&sbi->ll_kobj_unregister);
 880 }
 881
 882 static struct kobj_type llite_ktype = {
 883         .default_attrs  = llite_attrs,
 884         .sysfs_ops      = &lustre_sysfs_ops,
 885         .release        = llite_sb_release,
 886 };
 887
 888 static const struct llite_file_opcode {
 889         __u32       opcode;
 890         __u32       type;
 891         const char *opname;
 892 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 893         /* file operation */
 894         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 895         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 896         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 897                                    "read_bytes" },
 898         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 899                                    "write_bytes" },
 900         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 901                                    "brw_read" },
 902         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 903                                    "brw_write" },
 904         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 905                                    "osc_read" },
 906         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 907                                    "osc_write" },
 908         { LPROC_LL_IOCTL,         LPROCFS_TYPE_REGS, "ioctl" },
 909         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 910         { LPROC_LL_RELEASE,     LPROCFS_TYPE_REGS, "close" },
 911         { LPROC_LL_MAP,     LPROCFS_TYPE_REGS, "mmap" },
 912         { LPROC_LL_LLSEEK,       LPROCFS_TYPE_REGS, "seek" },
 913         { LPROC_LL_FSYNC,         LPROCFS_TYPE_REGS, "fsync" },
 914         { LPROC_LL_READDIR,     LPROCFS_TYPE_REGS, "readdir" },
 915         /* inode operation */
 916         { LPROC_LL_SETATTR,     LPROCFS_TYPE_REGS, "setattr" },
 917         { LPROC_LL_TRUNC,         LPROCFS_TYPE_REGS, "truncate" },
 918         { LPROC_LL_FLOCK,         LPROCFS_TYPE_REGS, "flock" },
 919         { LPROC_LL_GETATTR,     LPROCFS_TYPE_REGS, "getattr" },
 920         /* dir inode operation */
 921         { LPROC_LL_CREATE,       LPROCFS_TYPE_REGS, "create" },
 922         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 923         { LPROC_LL_UNLINK,       LPROCFS_TYPE_REGS, "unlink" },
 924         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_REGS, "symlink" },
 925         { LPROC_LL_MKDIR,         LPROCFS_TYPE_REGS, "mkdir" },
 926         { LPROC_LL_RMDIR,         LPROCFS_TYPE_REGS, "rmdir" },
 927         { LPROC_LL_MKNOD,         LPROCFS_TYPE_REGS, "mknod" },
 928         { LPROC_LL_RENAME,       LPROCFS_TYPE_REGS, "rename" },
 929         /* special inode operation */
 930         { LPROC_LL_STAFS,         LPROCFS_TYPE_REGS, "statfs" },
 931         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 932         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 933         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 934         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 935         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 936         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 937         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 938 };
 939
 940 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 941 {
 942         if (!sbi->ll_stats)
 943                 return;
 944         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 945                 lprocfs_counter_add(sbi->ll_stats, op, count);
 946         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 947                  sbi->ll_stats_track_id == current->pid)
 948                 lprocfs_counter_add(sbi->ll_stats, op, count);
 949         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 950                  sbi->ll_stats_track_id == current->real_parent->pid)
 951                 lprocfs_counter_add(sbi->ll_stats, op, count);
 952         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 953                  sbi->ll_stats_track_id ==
 954                         from_kgid(&init_user_ns, current_gid()))
 955                 lprocfs_counter_add(sbi->ll_stats, op, count);
 956 }
 957 EXPORT_SYMBOL(ll_stats_ops_tally);
 958
 959 static const char *ra_stat_string[] = {
 960         [RA_STAT_HIT] = "hits",
 961         [RA_STAT_MISS] = "misses",
 962         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 963         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 964         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 965         [RA_STAT_FAILED_MATCH] = "failed lock match",
 966         [RA_STAT_DISCARDED] = "read but discarded",
 967         [RA_STAT_ZERO_LEN] = "zero length file",
 968         [RA_STAT_ZERO_WINDOW] = "zero size window",
 969         [RA_STAT_EOF] = "read-ahead to EOF",
 970         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 971         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 972         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
 973 };
 974
 975 int ldebugfs_register_mountpoint(struct dentry *parent,
 976                                  struct super_block *sb, char *osc, char *mdc)
 977 {
 978         struct lustre_sb_info *lsi = s2lsi(sb);
 979         struct ll_sb_info *sbi = ll_s2sbi(sb);
 980         struct obd_device *obd;
 981         struct dentry *dir;
 982         char name[MAX_STRING_SIZE + 1], *ptr;
 983         int err, id, len, rc;
 984
 985         name[MAX_STRING_SIZE] = '\0';
 986
 987         LASSERT(sbi);
 988         LASSERT(mdc);
 989         LASSERT(osc);
 990
 991         /* Get fsname */
 992         len = strlen(lsi->lsi_lmd->lmd_profile);
 993         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 994         if (ptr && (strcmp(ptr, "-client") == 0))
 995                 len -= 7;
 996
 997         /* Mount info */
 998         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 999                  lsi->lsi_lmd->lmd_profile, sb);
1000
1001         dir = ldebugfs_register(name, parent, NULL, NULL);
1002         if (IS_ERR_OR_NULL(dir)) {
1003                 err = dir ? PTR_ERR(dir) : -ENOMEM;
1004                 sbi->ll_debugfs_entry = NULL;
1005                 return err;
1006         }
1007         sbi->ll_debugfs_entry = dir;
1008
1009         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "dump_page_cache", 0444,
1010                                  &vvp_dump_pgcache_file_ops, sbi);
1011         if (rc)
1012                 CWARN("Error adding the dump_page_cache file\n");
1013
1014         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "extents_stats", 0644,
1015                                  &ll_rw_extents_stats_fops, sbi);
1016         if (rc)
1017                 CWARN("Error adding the extent_stats file\n");
1018
1019         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry,
1020                                  "extents_stats_per_process",
1021                                  0644, &ll_rw_extents_stats_pp_fops, sbi);
1022         if (rc)
1023                 CWARN("Error adding the extents_stats_per_process file\n");
1024
1025         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "offset_stats", 0644,
1026                                  &ll_rw_offset_stats_fops, sbi);
1027         if (rc)
1028                 CWARN("Error adding the offset_stats file\n");
1029
1030         /* File operations stats */
1031         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1032                                             LPROCFS_STATS_FLAG_NONE);
1033         if (!sbi->ll_stats) {
1034                 err = -ENOMEM;
1035                 goto out;
1036         }
1037         /* do counter init */
1038         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1039                 __u32 type = llite_opcode_table[id].type;
1040                 void *ptr = NULL;
1041
1042                 if (type & LPROCFS_TYPE_REGS)
1043                         ptr = "regs";
1044                 else if (type & LPROCFS_TYPE_BYTES)
1045                         ptr = "bytes";
1046                 else if (type & LPROCFS_TYPE_PAGES)
1047                         ptr = "pages";
1048                 lprocfs_counter_init(sbi->ll_stats,
1049                                      llite_opcode_table[id].opcode,
1050                                      (type & LPROCFS_CNTR_AVGMINMAX),
1051                                      llite_opcode_table[id].opname, ptr);
1052         }
1053         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "stats",
1054                                       sbi->ll_stats);
1055         if (err)
1056                 goto out;
1057
1058         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1059                                                LPROCFS_STATS_FLAG_NONE);
1060         if (!sbi->ll_ra_stats) {
1061                 err = -ENOMEM;
1062                 goto out;
1063         }
1064
1065         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1066                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1067                                      ra_stat_string[id], "pages");
1068
1069         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "read_ahead_stats",
1070                                       sbi->ll_ra_stats);
1071         if (err)
1072                 goto out;
1073
1074         err = ldebugfs_add_vars(sbi->ll_debugfs_entry,
1075                                 lprocfs_llite_obd_vars, sb);
1076         if (err)
1077                 goto out;
1078
1079         sbi->ll_kobj.kset = llite_kset;
1080         init_completion(&sbi->ll_kobj_unregister);
1081         err = kobject_init_and_add(&sbi->ll_kobj, &llite_ktype, NULL,
1082                                    "%s", name);
1083         if (err)
1084                 goto out;
1085
1086         /* MDC info */
1087         obd = class_name2obd(mdc);
1088
1089         err = sysfs_create_link(&sbi->ll_kobj, &obd->obd_kobj,
1090                                 obd->obd_type->typ_name);
1091         if (err)
1092                 goto out;
1093
1094         /* OSC */
1095         obd = class_name2obd(osc);
1096
1097         err = sysfs_create_link(&sbi->ll_kobj, &obd->obd_kobj,
1098                                 obd->obd_type->typ_name);
1099 out:
1100         if (err) {
1101                 ldebugfs_remove(&sbi->ll_debugfs_entry);
1102                 lprocfs_free_stats(&sbi->ll_ra_stats);
1103                 lprocfs_free_stats(&sbi->ll_stats);
1104         }
1105         return err;
1106 }
1107
1108 void ldebugfs_unregister_mountpoint(struct ll_sb_info *sbi)
1109 {
1110         if (sbi->ll_debugfs_entry) {
1111                 ldebugfs_remove(&sbi->ll_debugfs_entry);
1112                 kobject_put(&sbi->ll_kobj);
1113                 wait_for_completion(&sbi->ll_kobj_unregister);
1114                 lprocfs_free_stats(&sbi->ll_ra_stats);
1115                 lprocfs_free_stats(&sbi->ll_stats);
1116         }
1117 }
1118
1119 #undef MAX_STRING_SIZE
1120
1121 #define pct(a, b) (b ? a * 100 / b : 0)
1122
1123 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1124                                     struct seq_file *seq, int which)
1125 {
1126         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1127         unsigned long start, end, r, w;
1128         char *unitp = "KMGTPEZY";
1129         int i, units = 10;
1130         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1131
1132         read_cum = 0;
1133         write_cum = 0;
1134         start = 0;
1135
1136         for (i = 0; i < LL_HIST_MAX; i++) {
1137                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1138                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1139         }
1140
1141         for (i = 0; i < LL_HIST_MAX; i++) {
1142                 r = pp_info->pp_r_hist.oh_buckets[i];
1143                 w = pp_info->pp_w_hist.oh_buckets[i];
1144                 read_cum += r;
1145                 write_cum += w;
1146                 end = 1 << (i + LL_HIST_START - units);
1147                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | %14lu %4lu %4lu\n",
1148                            start, *unitp, end, *unitp,
1149                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1150                            r, pct(r, read_tot), pct(read_cum, read_tot),
1151                            w, pct(w, write_tot), pct(write_cum, write_tot));
1152                 start = end;
1153                 if (start == 1<<10) {
1154                         start = 1;
1155                         units += 10;
1156                         unitp++;
1157                 }
1158                 if (read_cum == read_tot && write_cum == write_tot)
1159                         break;
1160         }
1161 }
1162
1163 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1164 {
1165         struct timespec64 now;
1166         struct ll_sb_info *sbi = seq->private;
1167         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1168         int k;
1169
1170         ktime_get_real_ts64(&now);
1171
1172         if (!sbi->ll_rw_stats_on) {
1173                 seq_printf(seq, "disabled\n"
1174                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1175                 return 0;
1176         }
1177         seq_printf(seq, "snapshot_time:  %llu.%09lu (secs.usecs)\n",
1178                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1179         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1180         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1181                    "extents", "calls", "%", "cum%",
1182                    "calls", "%", "cum%");
1183         spin_lock(&sbi->ll_pp_extent_lock);
1184         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1185                 if (io_extents->pp_extents[k].pid != 0) {
1186                         seq_printf(seq, "\nPID: %d\n",
1187                                    io_extents->pp_extents[k].pid);
1188                         ll_display_extents_info(io_extents, seq, k);
1189                 }
1190         }
1191         spin_unlock(&sbi->ll_pp_extent_lock);
1192         return 0;
1193 }
1194
1195 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1196                                                 const char __user *buf,
1197                                                 size_t len,
1198                                                 loff_t *off)
1199 {
1200         struct seq_file *seq = file->private_data;
1201         struct ll_sb_info *sbi = seq->private;
1202         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1203         int i;
1204         int value = 1, rc = 0;
1205
1206         if (len == 0)
1207                 return -EINVAL;
1208
1209         rc = lprocfs_write_helper(buf, len, &value);
1210         if (rc < 0 && len < 16) {
1211                 char kernbuf[16];
1212
1213                 if (copy_from_user(kernbuf, buf, len))
1214                         return -EFAULT;
1215                 kernbuf[len] = 0;
1216
1217                 if (kernbuf[len - 1] == '\n')
1218                         kernbuf[len - 1] = 0;
1219
1220                 if (strcmp(kernbuf, "disabled") == 0 ||
1221                     strcmp(kernbuf, "Disabled") == 0)
1222                         value = 0;
1223         }
1224
1225         if (value == 0)
1226                 sbi->ll_rw_stats_on = 0;
1227         else
1228                 sbi->ll_rw_stats_on = 1;
1229
1230         spin_lock(&sbi->ll_pp_extent_lock);
1231         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1232                 io_extents->pp_extents[i].pid = 0;
1233                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1234                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1235         }
1236         spin_unlock(&sbi->ll_pp_extent_lock);
1237         return len;
1238 }
1239
1240 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1241
1242 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1243 {
1244         struct timespec64 now;
1245         struct ll_sb_info *sbi = seq->private;
1246         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1247
1248         ktime_get_real_ts64(&now);
1249
1250         if (!sbi->ll_rw_stats_on) {
1251                 seq_printf(seq, "disabled\n"
1252                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1253                 return 0;
1254         }
1255         seq_printf(seq, "snapshot_time:  %llu.%09lu (secs.usecs)\n",
1256                    (u64)now.tv_sec, (unsigned long)now.tv_nsec);
1257
1258         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1259         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1260                    "extents", "calls", "%", "cum%",
1261                    "calls", "%", "cum%");
1262         spin_lock(&sbi->ll_lock);
1263         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1264         spin_unlock(&sbi->ll_lock);
1265
1266         return 0;
1267 }
1268
1269 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1270                                              const char __user *buf,
1271                                              size_t len, loff_t *off)
1272 {
1273         struct seq_file *seq = file->private_data;
1274         struct ll_sb_info *sbi = seq->private;
1275         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1276         int i;
1277         int value = 1, rc = 0;
1278
1279         if (len == 0)
1280                 return -EINVAL;
1281
1282         rc = lprocfs_write_helper(buf, len, &value);
1283         if (rc < 0 && len < 16) {
1284                 char kernbuf[16];
1285
1286                 if (copy_from_user(kernbuf, buf, len))
1287                         return -EFAULT;
1288                 kernbuf[len] = 0;
1289
1290                 if (kernbuf[len - 1] == '\n')
1291                         kernbuf[len - 1] = 0;
1292
1293                 if (strcmp(kernbuf, "disabled") == 0 ||
1294                     strcmp(kernbuf, "Disabled") == 0)
1295                         value = 0;
1296         }
1297
1298         if (value == 0)
1299                 sbi->ll_rw_stats_on = 0;
1300         else
1301                 sbi->ll_rw_stats_on = 1;
1302
1303         spin_lock(&sbi->ll_pp_extent_lock);
1304         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1305                 io_extents->pp_extents[i].pid = 0;
1306                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1307                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1308         }
1309         spin_unlock(&sbi->ll_pp_extent_lock);
1310
1311         return len;
1312 }
1313
1314 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1315
1316 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1317                        struct ll_file_data *file, loff_t pos,
1318                        size_t count, int rw)
1319 {
1320         int i, cur = -1;
1321         struct ll_rw_process_info *process;
1322         struct ll_rw_process_info *offset;
1323         int *off_count = &sbi->ll_rw_offset_entry_count;
1324         int *process_count = &sbi->ll_offset_process_count;
1325         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1326
1327         if (!sbi->ll_rw_stats_on)
1328                 return;
1329         process = sbi->ll_rw_process_info;
1330         offset = sbi->ll_rw_offset_info;
1331
1332         spin_lock(&sbi->ll_pp_extent_lock);
1333         /* Extent statistics */
1334         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1335                 if (io_extents->pp_extents[i].pid == pid) {
1336                         cur = i;
1337                         break;
1338                 }
1339         }
1340
1341         if (cur == -1) {
1342                 /* new process */
1343                 sbi->ll_extent_process_count =
1344                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1345                 cur = sbi->ll_extent_process_count;
1346                 io_extents->pp_extents[cur].pid = pid;
1347                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1348                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1349         }
1350
1351         for (i = 0; (count >= (1 << LL_HIST_START << i)) &&
1352              (i < (LL_HIST_MAX - 1)); i++)
1353                 ;
1354         if (rw == 0) {
1355                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1356                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1357         } else {
1358                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1359                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1360         }
1361         spin_unlock(&sbi->ll_pp_extent_lock);
1362
1363         spin_lock(&sbi->ll_process_lock);
1364         /* Offset statistics */
1365         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1366                 if (process[i].rw_pid == pid) {
1367                         if (process[i].rw_last_file != file) {
1368                                 process[i].rw_range_start = pos;
1369                                 process[i].rw_last_file_pos = pos + count;
1370                                 process[i].rw_smallest_extent = count;
1371                                 process[i].rw_largest_extent = count;
1372                                 process[i].rw_offset = 0;
1373                                 process[i].rw_last_file = file;
1374                                 spin_unlock(&sbi->ll_process_lock);
1375                                 return;
1376                         }
1377                         if (process[i].rw_last_file_pos != pos) {
1378                                 *off_count =
1379                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1380                                 offset[*off_count].rw_op = process[i].rw_op;
1381                                 offset[*off_count].rw_pid = pid;
1382                                 offset[*off_count].rw_range_start =
1383                                         process[i].rw_range_start;
1384                                 offset[*off_count].rw_range_end =
1385                                         process[i].rw_last_file_pos;
1386                                 offset[*off_count].rw_smallest_extent =
1387                                         process[i].rw_smallest_extent;
1388                                 offset[*off_count].rw_largest_extent =
1389                                         process[i].rw_largest_extent;
1390                                 offset[*off_count].rw_offset =
1391                                         process[i].rw_offset;
1392                                 process[i].rw_op = rw;
1393                                 process[i].rw_range_start = pos;
1394                                 process[i].rw_smallest_extent = count;
1395                                 process[i].rw_largest_extent = count;
1396                                 process[i].rw_offset = pos -
1397                                         process[i].rw_last_file_pos;
1398                         }
1399                         if (process[i].rw_smallest_extent > count)
1400                                 process[i].rw_smallest_extent = count;
1401                         if (process[i].rw_largest_extent < count)
1402                                 process[i].rw_largest_extent = count;
1403                         process[i].rw_last_file_pos = pos + count;
1404                         spin_unlock(&sbi->ll_process_lock);
1405                         return;
1406                 }
1407         }
1408         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1409         process[*process_count].rw_pid = pid;
1410         process[*process_count].rw_op = rw;
1411         process[*process_count].rw_range_start = pos;
1412         process[*process_count].rw_last_file_pos = pos + count;
1413         process[*process_count].rw_smallest_extent = count;
1414         process[*process_count].rw_largest_extent = count;
1415         process[*process_count].rw_offset = 0;
1416         process[*process_count].rw_last_file = file;
1417         spin_unlock(&sbi->ll_process_lock);
1418 }
1419
1420 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1421 {
1422         struct timespec64 now;
1423         struct ll_sb_info *sbi = seq->private;
1424         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1425         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1426         int i;
1427
1428         ktime_get_real_ts64(&now);
1429
1430         if (!sbi->ll_rw_stats_on) {
1431                 seq_printf(seq, "disabled\n"
1432                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1433                 return 0;
1434         }
1435         spin_lock(&sbi->ll_process_lock);
1436
1437         seq_printf(seq, "snapshot_time:  %llu.%09lu (secs.usecs)\n",
1438                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1439         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1440                    "R/W", "PID", "RANGE START", "RANGE END",
1441                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1442         /* We stored the discontiguous offsets here; print them first */
1443         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1444                 if (offset[i].rw_pid != 0)
1445                         seq_printf(seq,
1446                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1447                                    offset[i].rw_op == READ ? 'R' : 'W',
1448                                    offset[i].rw_pid,
1449                                    offset[i].rw_range_start,
1450                                    offset[i].rw_range_end,
1451                                    (unsigned long)offset[i].rw_smallest_extent,
1452                                    (unsigned long)offset[i].rw_largest_extent,
1453                                    offset[i].rw_offset);
1454         }
1455         /* Then print the current offsets for each process */
1456         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1457                 if (process[i].rw_pid != 0)
1458                         seq_printf(seq,
1459                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1460                                    process[i].rw_op == READ ? 'R' : 'W',
1461                                    process[i].rw_pid,
1462                                    process[i].rw_range_start,
1463                                    process[i].rw_last_file_pos,
1464                                    (unsigned long)process[i].rw_smallest_extent,
1465                                    (unsigned long)process[i].rw_largest_extent,
1466                                    process[i].rw_offset);
1467         }
1468         spin_unlock(&sbi->ll_process_lock);
1469
1470         return 0;
1471 }
1472
1473 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1474                                             const char __user *buf,
1475                                             size_t len, loff_t *off)
1476 {
1477         struct seq_file *seq = file->private_data;
1478         struct ll_sb_info *sbi = seq->private;
1479         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1480         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1481         int value = 1, rc = 0;
1482
1483         if (len == 0)
1484                 return -EINVAL;
1485
1486         rc = lprocfs_write_helper(buf, len, &value);
1487
1488         if (rc < 0 && len < 16) {
1489                 char kernbuf[16];
1490
1491                 if (copy_from_user(kernbuf, buf, len))
1492                         return -EFAULT;
1493                 kernbuf[len] = 0;
1494
1495                 if (kernbuf[len - 1] == '\n')
1496                         kernbuf[len - 1] = 0;
1497
1498                 if (strcmp(kernbuf, "disabled") == 0 ||
1499                     strcmp(kernbuf, "Disabled") == 0)
1500                         value = 0;
1501         }
1502
1503         if (value == 0)
1504                 sbi->ll_rw_stats_on = 0;
1505         else
1506                 sbi->ll_rw_stats_on = 1;
1507
1508         spin_lock(&sbi->ll_process_lock);
1509         sbi->ll_offset_process_count = 0;
1510         sbi->ll_rw_offset_entry_count = 0;
1511         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1512                LL_PROCESS_HIST_MAX);
1513         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1514                LL_OFFSET_HIST_MAX);
1515         spin_unlock(&sbi->ll_process_lock);
1516
1517         return len;
1518 }
1519
1520 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1521
1522 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1523 {
1524         lvars->obd_vars = lprocfs_llite_obd_vars;
1525 }