kernel/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.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) 2011, 2012, 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 "../include/lustre_lite.h"
  39 #include "../include/lprocfs_status.h"
  40 #include <linux/seq_file.h>
  41 #include "../include/obd_support.h"
  42
  43 #include "llite_internal.h"
  44 #include "vvp_internal.h"
  45
  46 /* /proc/lustre/llite mount point registration */
  47 static struct file_operations ll_rw_extents_stats_fops;
  48 static struct file_operations ll_rw_extents_stats_pp_fops;
  49 static struct file_operations ll_rw_offset_stats_fops;
  50
  51 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  52 {
  53         struct super_block *sb = (struct super_block *)m->private;
  54         struct obd_statfs osfs;
  55         int rc;
  56
  57         LASSERT(sb != NULL);
  58         rc = ll_statfs_internal(sb, &osfs,
  59                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  60                                 OBD_STATFS_NODELAY);
  61         if (!rc)
  62                 seq_printf(m, "%u\n", osfs.os_bsize);
  63
  64         return rc;
  65 }
  66 LPROC_SEQ_FOPS_RO(ll_blksize);
  67
  68 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  69 {
  70         struct super_block *sb = (struct super_block *)m->private;
  71         struct obd_statfs osfs;
  72         int rc;
  73
  74         LASSERT(sb != NULL);
  75         rc = ll_statfs_internal(sb, &osfs,
  76                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  77                                 OBD_STATFS_NODELAY);
  78         if (!rc) {
  79                 __u32 blk_size = osfs.os_bsize >> 10;
  80                 __u64 result = osfs.os_blocks;
  81
  82                 while (blk_size >>= 1)
  83                         result <<= 1;
  84
  85                 seq_printf(m, "%llu\n", result);
  86         }
  87
  88         return rc;
  89 }
  90 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  91
  92 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  93 {
  94         struct super_block *sb = (struct super_block *)m->private;
  95         struct obd_statfs osfs;
  96         int rc;
  97
  98         LASSERT(sb != NULL);
  99         rc = ll_statfs_internal(sb, &osfs,
 100                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 101                                 OBD_STATFS_NODELAY);
 102         if (!rc) {
 103                 __u32 blk_size = osfs.os_bsize >> 10;
 104                 __u64 result = osfs.os_bfree;
 105
 106                 while (blk_size >>= 1)
 107                         result <<= 1;
 108
 109                 seq_printf(m, "%llu\n", result);
 110         }
 111
 112         return rc;
 113 }
 114 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 115
 116 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 117 {
 118         struct super_block *sb = (struct super_block *)m->private;
 119         struct obd_statfs osfs;
 120         int rc;
 121
 122         LASSERT(sb != NULL);
 123         rc = ll_statfs_internal(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                 seq_printf(m, "%llu\n", result);
 134         }
 135
 136         return rc;
 137 }
 138 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 139
 140 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 141 {
 142         struct super_block *sb = (struct super_block *)m->private;
 143         struct obd_statfs osfs;
 144         int rc;
 145
 146         LASSERT(sb != NULL);
 147         rc = ll_statfs_internal(sb, &osfs,
 148                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 149                                 OBD_STATFS_NODELAY);
 150         if (!rc)
 151                 seq_printf(m, "%llu\n", osfs.os_files);
 152
 153         return rc;
 154 }
 155 LPROC_SEQ_FOPS_RO(ll_filestotal);
 156
 157 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 158 {
 159         struct super_block *sb = (struct super_block *)m->private;
 160         struct obd_statfs osfs;
 161         int rc;
 162
 163         LASSERT(sb != NULL);
 164         rc = ll_statfs_internal(sb, &osfs,
 165                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 166                                 OBD_STATFS_NODELAY);
 167         if (!rc)
 168                 seq_printf(m, "%llu\n", osfs.os_ffree);
 169
 170         return rc;
 171 }
 172 LPROC_SEQ_FOPS_RO(ll_filesfree);
 173
 174 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 175 {
 176         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 177
 178         LASSERT(sbi != NULL);
 179
 180         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 181                 seq_puts(m, "remote client\n");
 182         else
 183                 seq_puts(m, "local client\n");
 184
 185         return 0;
 186 }
 187 LPROC_SEQ_FOPS_RO(ll_client_type);
 188
 189 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 190 {
 191         struct super_block *sb = (struct super_block *)m->private;
 192
 193         LASSERT(sb != NULL);
 194         seq_printf(m, "%s\n", sb->s_type->name);
 195         return 0;
 196 }
 197 LPROC_SEQ_FOPS_RO(ll_fstype);
 198
 199 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 200 {
 201         struct super_block *sb = (struct super_block *)m->private;
 202
 203         LASSERT(sb != NULL);
 204         seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 205         return 0;
 206 }
 207 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 208
 209 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 210 {
 211         struct super_block *sb = m->private;
 212
 213         /*
 214          * See description of statistical counters in struct cl_site, and
 215          * struct lu_site.
 216          */
 217         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 218 }
 219 LPROC_SEQ_FOPS_RO(ll_site_stats);
 220
 221 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 222 {
 223         struct super_block *sb = m->private;
 224         struct ll_sb_info *sbi = ll_s2sbi(sb);
 225         long pages_number;
 226         int mult;
 227
 228         spin_lock(&sbi->ll_lock);
 229         pages_number = sbi->ll_ra_info.ra_max_pages;
 230         spin_unlock(&sbi->ll_lock);
 231
 232         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 233         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 234 }
 235
 236 static ssize_t ll_max_readahead_mb_seq_write(struct file *file,
 237                                              const char __user *buffer,
 238                                              size_t count, loff_t *off)
 239 {
 240         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 241         struct ll_sb_info *sbi = ll_s2sbi(sb);
 242         int mult, rc, pages_number;
 243
 244         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 245         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 246         if (rc)
 247                 return rc;
 248
 249         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 250                 CERROR("can't set file readahead more than %lu MB\n",
 251                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/
 252                 return -ERANGE;
 253         }
 254
 255         spin_lock(&sbi->ll_lock);
 256         sbi->ll_ra_info.ra_max_pages = pages_number;
 257         spin_unlock(&sbi->ll_lock);
 258
 259         return count;
 260 }
 261 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 262
 263 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 264 {
 265         struct super_block *sb = m->private;
 266         struct ll_sb_info *sbi = ll_s2sbi(sb);
 267         long pages_number;
 268         int mult;
 269
 270         spin_lock(&sbi->ll_lock);
 271         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 272         spin_unlock(&sbi->ll_lock);
 273
 274         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 275         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 276 }
 277
 278 static ssize_t ll_max_readahead_per_file_mb_seq_write(struct file *file,
 279                                                   const char __user *buffer,
 280                                                   size_t count, loff_t *off)
 281 {
 282         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 283         struct ll_sb_info *sbi = ll_s2sbi(sb);
 284         int mult, rc, pages_number;
 285
 286         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 287         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 288         if (rc)
 289                 return rc;
 290
 291         if (pages_number < 0 ||
 292                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 293                 CERROR("can't set file readahead more than max_read_ahead_mb %lu MB\n",
 294                        sbi->ll_ra_info.ra_max_pages);
 295                 return -ERANGE;
 296         }
 297
 298         spin_lock(&sbi->ll_lock);
 299         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 300         spin_unlock(&sbi->ll_lock);
 301
 302         return count;
 303 }
 304 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 305
 306 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused)
 307 {
 308         struct super_block *sb = m->private;
 309         struct ll_sb_info *sbi = ll_s2sbi(sb);
 310         long pages_number;
 311         int mult;
 312
 313         spin_lock(&sbi->ll_lock);
 314         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 315         spin_unlock(&sbi->ll_lock);
 316
 317         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 318         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 319 }
 320
 321 static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 322                                                 const char __user *buffer,
 323                                                 size_t count, loff_t *off)
 324 {
 325         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 326         struct ll_sb_info *sbi = ll_s2sbi(sb);
 327         int mult, rc, pages_number;
 328
 329         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 330         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 331         if (rc)
 332                 return rc;
 333
 334         /* Cap this at the current max readahead window size, the readahead
 335          * algorithm does this anyway so it's pointless to set it larger. */
 336         if (pages_number < 0 ||
 337             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 338                 CERROR("can't set max_read_ahead_whole_mb more than max_read_ahead_per_file_mb: %lu\n",
 339                        sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT));
 340                 return -ERANGE;
 341         }
 342
 343         spin_lock(&sbi->ll_lock);
 344         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 345         spin_unlock(&sbi->ll_lock);
 346
 347         return count;
 348 }
 349 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 350
 351 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 352 {
 353         struct super_block     *sb    = m->private;
 354         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 355         struct cl_client_cache *cache = &sbi->ll_cache;
 356         int shift = 20 - PAGE_CACHE_SHIFT;
 357         int max_cached_mb;
 358         int unused_mb;
 359
 360         max_cached_mb = cache->ccc_lru_max >> shift;
 361         unused_mb = atomic_read(&cache->ccc_lru_left) >> shift;
 362         seq_printf(m,
 363                    "users: %d\n"
 364                    "max_cached_mb: %d\n"
 365                    "used_mb: %d\n"
 366                    "unused_mb: %d\n"
 367                    "reclaim_count: %u\n",
 368                    atomic_read(&cache->ccc_users),
 369                    max_cached_mb,
 370                    max_cached_mb - unused_mb,
 371                    unused_mb,
 372                    cache->ccc_lru_shrinkers);
 373         return 0;
 374 }
 375
 376 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 377                                           const char __user *buffer,
 378                                           size_t count, loff_t *off)
 379 {
 380         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 381         struct ll_sb_info *sbi = ll_s2sbi(sb);
 382         struct cl_client_cache *cache = &sbi->ll_cache;
 383         int mult, rc, pages_number;
 384         int diff = 0;
 385         int nrpages = 0;
 386         char kernbuf[128];
 387
 388         if (count >= sizeof(kernbuf))
 389                 return -EINVAL;
 390
 391         if (copy_from_user(kernbuf, buffer, count))
 392                 return -EFAULT;
 393         kernbuf[count] = 0;
 394
 395         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 396         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 397                   kernbuf;
 398         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 399         if (rc)
 400                 return rc;
 401
 402         if (pages_number < 0 || pages_number > totalram_pages) {
 403                 CERROR("%s: can't set max cache more than %lu MB\n",
 404                        ll_get_fsname(sb, NULL, 0),
 405                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 406                 return -ERANGE;
 407         }
 408
 409         spin_lock(&sbi->ll_lock);
 410         diff = pages_number - cache->ccc_lru_max;
 411         spin_unlock(&sbi->ll_lock);
 412
 413         /* easy - add more LRU slots. */
 414         if (diff >= 0) {
 415                 atomic_add(diff, &cache->ccc_lru_left);
 416                 rc = 0;
 417                 goto out;
 418         }
 419
 420         diff = -diff;
 421         while (diff > 0) {
 422                 int tmp;
 423
 424                 /* reduce LRU budget from free slots. */
 425                 do {
 426                         int ov, nv;
 427
 428                         ov = atomic_read(&cache->ccc_lru_left);
 429                         if (ov == 0)
 430                                 break;
 431
 432                         nv = ov > diff ? ov - diff : 0;
 433                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 434                         if (likely(ov == rc)) {
 435                                 diff -= ov - nv;
 436                                 nrpages += ov - nv;
 437                                 break;
 438                         }
 439                 } while (1);
 440
 441                 if (diff <= 0)
 442                         break;
 443
 444                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 445                         rc = -ENODEV;
 446                         break;
 447                 }
 448
 449                 /* difficult - have to ask OSCs to drop LRU slots. */
 450                 tmp = diff << 1;
 451                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 452                                 sizeof(KEY_CACHE_LRU_SHRINK),
 453                                 KEY_CACHE_LRU_SHRINK,
 454                                 sizeof(tmp), &tmp, NULL);
 455                 if (rc < 0)
 456                         break;
 457         }
 458
 459 out:
 460         if (rc >= 0) {
 461                 spin_lock(&sbi->ll_lock);
 462                 cache->ccc_lru_max = pages_number;
 463                 spin_unlock(&sbi->ll_lock);
 464                 rc = count;
 465         } else {
 466                 atomic_add(nrpages, &cache->ccc_lru_left);
 467         }
 468         return rc;
 469 }
 470 LPROC_SEQ_FOPS(ll_max_cached_mb);
 471
 472 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 473 {
 474         struct super_block *sb = m->private;
 475         struct ll_sb_info *sbi = ll_s2sbi(sb);
 476
 477         seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 478         return 0;
 479 }
 480
 481 static ssize_t ll_checksum_seq_write(struct file *file,
 482                                      const char __user *buffer,
 483                                      size_t count, loff_t *off)
 484 {
 485         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 486         struct ll_sb_info *sbi = ll_s2sbi(sb);
 487         int val, rc;
 488
 489         if (!sbi->ll_dt_exp)
 490                 /* Not set up yet */
 491                 return -EAGAIN;
 492
 493         rc = lprocfs_write_helper(buffer, count, &val);
 494         if (rc)
 495                 return rc;
 496         if (val)
 497                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 498         else
 499                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 500
 501         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 502                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 503         if (rc)
 504                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 505
 506         return count;
 507 }
 508 LPROC_SEQ_FOPS(ll_checksum);
 509
 510 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 511 {
 512         struct super_block *sb = m->private;
 513
 514         seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 515         return 0;
 516 }
 517
 518 static ssize_t ll_max_rw_chunk_seq_write(struct file *file,
 519                                          const char __user *buffer,
 520                                          size_t count, loff_t *off)
 521 {
 522         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 523         int rc, val;
 524
 525         rc = lprocfs_write_helper(buffer, count, &val);
 526         if (rc)
 527                 return rc;
 528         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 529         return count;
 530 }
 531 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 532
 533 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 534 {
 535         struct super_block *sb = m->private;
 536
 537         if (ll_s2sbi(sb)->ll_stats_track_type == type)
 538                 seq_printf(m, "%d\n", ll_s2sbi(sb)->ll_stats_track_id);
 539         else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL)
 540                 seq_puts(m, "0 (all)\n");
 541         else
 542                 seq_puts(m, "untracked\n");
 543
 544         return 0;
 545 }
 546
 547 static int ll_wr_track_id(const char __user *buffer, unsigned long count,
 548                           void *data, enum stats_track_type type)
 549 {
 550         struct super_block *sb = data;
 551         int rc, pid;
 552
 553         rc = lprocfs_write_helper(buffer, count, &pid);
 554         if (rc)
 555                 return rc;
 556         ll_s2sbi(sb)->ll_stats_track_id = pid;
 557         if (pid == 0)
 558                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 559         else
 560                 ll_s2sbi(sb)->ll_stats_track_type = type;
 561         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 562         return count;
 563 }
 564
 565 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 566 {
 567         return ll_rd_track_id(m, STATS_TRACK_PID);
 568 }
 569
 570 static ssize_t ll_track_pid_seq_write(struct file *file,
 571                                       const char __user *buffer,
 572                                       size_t count, loff_t *off)
 573 {
 574         struct seq_file *seq = file->private_data;
 575         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 576 }
 577 LPROC_SEQ_FOPS(ll_track_pid);
 578
 579 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 580 {
 581         return ll_rd_track_id(m, STATS_TRACK_PPID);
 582 }
 583
 584 static ssize_t ll_track_ppid_seq_write(struct file *file,
 585                                        const char __user *buffer,
 586                                        size_t count, loff_t *off)
 587 {
 588         struct seq_file *seq = file->private_data;
 589         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 590 }
 591 LPROC_SEQ_FOPS(ll_track_ppid);
 592
 593 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 594 {
 595         return ll_rd_track_id(m, STATS_TRACK_GID);
 596 }
 597
 598 static ssize_t ll_track_gid_seq_write(struct file *file,
 599                                       const char __user *buffer,
 600                                       size_t count, loff_t *off)
 601 {
 602         struct seq_file *seq = file->private_data;
 603         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 604 }
 605 LPROC_SEQ_FOPS(ll_track_gid);
 606
 607 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 608 {
 609         struct super_block *sb = m->private;
 610         struct ll_sb_info *sbi = ll_s2sbi(sb);
 611
 612         seq_printf(m, "%u\n", sbi->ll_sa_max);
 613         return 0;
 614 }
 615
 616 static ssize_t ll_statahead_max_seq_write(struct file *file,
 617                                           const char __user *buffer,
 618                                           size_t count, loff_t *off)
 619 {
 620         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 621         struct ll_sb_info *sbi = ll_s2sbi(sb);
 622         int val, rc;
 623
 624         rc = lprocfs_write_helper(buffer, count, &val);
 625         if (rc)
 626                 return rc;
 627
 628         if (val >= 0 && val <= LL_SA_RPC_MAX)
 629                 sbi->ll_sa_max = val;
 630         else
 631                 CERROR("Bad statahead_max value %d. Valid values are in the range [0, %d]\n",
 632                        val, LL_SA_RPC_MAX);
 633
 634         return count;
 635 }
 636 LPROC_SEQ_FOPS(ll_statahead_max);
 637
 638 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 639 {
 640         struct super_block *sb = m->private;
 641         struct ll_sb_info *sbi = ll_s2sbi(sb);
 642
 643         seq_printf(m, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 644         return 0;
 645 }
 646
 647 static ssize_t ll_statahead_agl_seq_write(struct file *file,
 648                                           const char __user *buffer,
 649                                           size_t count, loff_t *off)
 650 {
 651         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 652         struct ll_sb_info *sbi = ll_s2sbi(sb);
 653         int val, rc;
 654
 655         rc = lprocfs_write_helper(buffer, count, &val);
 656         if (rc)
 657                 return rc;
 658
 659         if (val)
 660                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 661         else
 662                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 663
 664         return count;
 665 }
 666 LPROC_SEQ_FOPS(ll_statahead_agl);
 667
 668 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 669 {
 670         struct super_block *sb = m->private;
 671         struct ll_sb_info *sbi = ll_s2sbi(sb);
 672
 673         seq_printf(m,
 674                    "statahead total: %u\n"
 675                    "statahead wrong: %u\n"
 676                    "agl total: %u\n",
 677                    atomic_read(&sbi->ll_sa_total),
 678                    atomic_read(&sbi->ll_sa_wrong),
 679                    atomic_read(&sbi->ll_agl_total));
 680         return 0;
 681 }
 682 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 683
 684 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 685 {
 686         struct super_block *sb = m->private;
 687         struct ll_sb_info *sbi = ll_s2sbi(sb);
 688
 689         seq_printf(m, "%u\n", sbi->ll_flags & LL_SBI_LAZYSTATFS ? 1 : 0);
 690         return 0;
 691 }
 692
 693 static ssize_t ll_lazystatfs_seq_write(struct file *file,
 694                                        const char __user *buffer,
 695                                        size_t count, loff_t *off)
 696 {
 697         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 698         struct ll_sb_info *sbi = ll_s2sbi(sb);
 699         int val, rc;
 700
 701         rc = lprocfs_write_helper(buffer, count, &val);
 702         if (rc)
 703                 return rc;
 704
 705         if (val)
 706                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 707         else
 708                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 709
 710         return count;
 711 }
 712 LPROC_SEQ_FOPS(ll_lazystatfs);
 713
 714 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 715 {
 716         struct super_block *sb = m->private;
 717         struct ll_sb_info *sbi = ll_s2sbi(sb);
 718         unsigned int ealen;
 719         int rc;
 720
 721         rc = ll_get_max_mdsize(sbi, &ealen);
 722         if (rc)
 723                 return rc;
 724
 725         seq_printf(m, "%u\n", ealen);
 726         return 0;
 727 }
 728 LPROC_SEQ_FOPS_RO(ll_max_easize);
 729
 730 static int ll_default_easize_seq_show(struct seq_file *m, void *v)
 731 {
 732         struct super_block *sb = m->private;
 733         struct ll_sb_info *sbi = ll_s2sbi(sb);
 734         unsigned int ealen;
 735         int rc;
 736
 737         rc = ll_get_default_mdsize(sbi, &ealen);
 738         if (rc)
 739                 return rc;
 740
 741         seq_printf(m, "%u\n", ealen);
 742         return 0;
 743 }
 744 LPROC_SEQ_FOPS_RO(ll_default_easize);
 745
 746 static int ll_max_cookiesize_seq_show(struct seq_file *m, void *v)
 747 {
 748         struct super_block *sb = m->private;
 749         struct ll_sb_info *sbi = ll_s2sbi(sb);
 750         unsigned int cookielen;
 751         int rc;
 752
 753         rc = ll_get_max_cookiesize(sbi, &cookielen);
 754         if (rc)
 755                 return rc;
 756
 757         seq_printf(m, "%u\n", cookielen);
 758         return 0;
 759 }
 760 LPROC_SEQ_FOPS_RO(ll_max_cookiesize);
 761
 762 static int ll_default_cookiesize_seq_show(struct seq_file *m, void *v)
 763 {
 764         struct super_block *sb = m->private;
 765         struct ll_sb_info *sbi = ll_s2sbi(sb);
 766         unsigned int cookielen;
 767         int rc;
 768
 769         rc = ll_get_default_cookiesize(sbi, &cookielen);
 770         if (rc)
 771                 return rc;
 772
 773         seq_printf(m, "%u\n", cookielen);
 774         return 0;
 775 }
 776 LPROC_SEQ_FOPS_RO(ll_default_cookiesize);
 777
 778 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 779 {
 780         const char *str[] = LL_SBI_FLAGS;
 781         struct super_block *sb = m->private;
 782         int flags = ll_s2sbi(sb)->ll_flags;
 783         int i = 0;
 784
 785         while (flags != 0) {
 786                 if (ARRAY_SIZE(str) <= i) {
 787                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi flags please.\n",
 788                                ll_get_fsname(sb, NULL, 0));
 789                         return -EINVAL;
 790                 }
 791
 792                 if (flags & 0x1)
 793                         seq_printf(m, "%s ", str[i]);
 794                 flags >>= 1;
 795                 ++i;
 796         }
 797         seq_printf(m, "\b\n");
 798         return 0;
 799 }
 800 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 801
 802 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 803 {
 804         struct super_block *sb = m->private;
 805         struct ll_sb_info *sbi = ll_s2sbi(sb);
 806
 807         seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 808
 809         return 0;
 810 }
 811
 812 static ssize_t ll_xattr_cache_seq_write(struct file *file,
 813                                         const char __user *buffer,
 814                                         size_t count, loff_t *off)
 815 {
 816         struct seq_file *seq = file->private_data;
 817         struct super_block *sb = seq->private;
 818         struct ll_sb_info *sbi = ll_s2sbi(sb);
 819         int val, rc;
 820
 821         rc = lprocfs_write_helper(buffer, count, &val);
 822         if (rc)
 823                 return rc;
 824
 825         if (val != 0 && val != 1)
 826                 return -ERANGE;
 827
 828         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 829                 return -ENOTSUPP;
 830
 831         sbi->ll_xattr_cache_enabled = val;
 832
 833         return count;
 834 }
 835 LPROC_SEQ_FOPS(ll_xattr_cache);
 836
 837 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 838         { "uuid",         &ll_sb_uuid_fops,       NULL, 0 },
 839         /* { "mntpt_path",   ll_rd_path,             0, 0 }, */
 840         { "fstype",       &ll_fstype_fops,        NULL, 0 },
 841         { "site",         &ll_site_stats_fops,    NULL, 0 },
 842         { "blocksize",    &ll_blksize_fops,       NULL, 0 },
 843         { "kbytestotal",  &ll_kbytestotal_fops,   NULL, 0 },
 844         { "kbytesfree",   &ll_kbytesfree_fops,    NULL, 0 },
 845         { "kbytesavail",  &ll_kbytesavail_fops,   NULL, 0 },
 846         { "filestotal",   &ll_filestotal_fops,    NULL, 0 },
 847         { "filesfree",    &ll_filesfree_fops,     NULL, 0 },
 848         { "client_type",  &ll_client_type_fops,   NULL, 0 },
 849         /* { "filegroups",   lprocfs_rd_filegroups,  0, 0 }, */
 850         { "max_read_ahead_mb", &ll_max_readahead_mb_fops, NULL },
 851         { "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops,
 852                 NULL },
 853         { "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, NULL },
 854         { "max_cached_mb",    &ll_max_cached_mb_fops, NULL },
 855         { "checksum_pages",   &ll_checksum_fops, NULL },
 856         { "max_rw_chunk",     &ll_max_rw_chunk_fops, NULL },
 857         { "stats_track_pid",  &ll_track_pid_fops, NULL },
 858         { "stats_track_ppid", &ll_track_ppid_fops, NULL },
 859         { "stats_track_gid",  &ll_track_gid_fops, NULL },
 860         { "statahead_max",    &ll_statahead_max_fops, NULL },
 861         { "statahead_agl",    &ll_statahead_agl_fops, NULL },
 862         { "statahead_stats",  &ll_statahead_stats_fops, NULL, 0 },
 863         { "lazystatfs",       &ll_lazystatfs_fops, NULL },
 864         { "max_easize",       &ll_max_easize_fops, NULL, 0 },
 865         { "default_easize",   &ll_default_easize_fops, NULL, 0 },
 866         { "max_cookiesize",   &ll_max_cookiesize_fops, NULL, 0 },
 867         { "default_cookiesize", &ll_default_cookiesize_fops, NULL, 0 },
 868         { "sbi_flags",        &ll_sbi_flags_fops, NULL, 0 },
 869         { "xattr_cache",      &ll_xattr_cache_fops, NULL, 0 },
 870         { NULL }
 871 };
 872
 873 #define MAX_STRING_SIZE 128
 874
 875 static const struct llite_file_opcode {
 876         __u32       opcode;
 877         __u32       type;
 878         const char *opname;
 879 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 880         /* file operation */
 881         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 882         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 883         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 884                                    "read_bytes" },
 885         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 886                                    "write_bytes" },
 887         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 888                                    "brw_read" },
 889         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 890                                    "brw_write" },
 891         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 892                                    "osc_read" },
 893         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 894                                    "osc_write" },
 895         { LPROC_LL_IOCTL,         LPROCFS_TYPE_REGS, "ioctl" },
 896         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 897         { LPROC_LL_RELEASE,     LPROCFS_TYPE_REGS, "close" },
 898         { LPROC_LL_MAP,     LPROCFS_TYPE_REGS, "mmap" },
 899         { LPROC_LL_LLSEEK,       LPROCFS_TYPE_REGS, "seek" },
 900         { LPROC_LL_FSYNC,         LPROCFS_TYPE_REGS, "fsync" },
 901         { LPROC_LL_READDIR,     LPROCFS_TYPE_REGS, "readdir" },
 902         /* inode operation */
 903         { LPROC_LL_SETATTR,     LPROCFS_TYPE_REGS, "setattr" },
 904         { LPROC_LL_TRUNC,         LPROCFS_TYPE_REGS, "truncate" },
 905         { LPROC_LL_FLOCK,         LPROCFS_TYPE_REGS, "flock" },
 906         { LPROC_LL_GETATTR,     LPROCFS_TYPE_REGS, "getattr" },
 907         /* dir inode operation */
 908         { LPROC_LL_CREATE,       LPROCFS_TYPE_REGS, "create" },
 909         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 910         { LPROC_LL_UNLINK,       LPROCFS_TYPE_REGS, "unlink" },
 911         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_REGS, "symlink" },
 912         { LPROC_LL_MKDIR,         LPROCFS_TYPE_REGS, "mkdir" },
 913         { LPROC_LL_RMDIR,         LPROCFS_TYPE_REGS, "rmdir" },
 914         { LPROC_LL_MKNOD,         LPROCFS_TYPE_REGS, "mknod" },
 915         { LPROC_LL_RENAME,       LPROCFS_TYPE_REGS, "rename" },
 916         /* special inode operation */
 917         { LPROC_LL_STAFS,         LPROCFS_TYPE_REGS, "statfs" },
 918         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 919         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 920         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 921         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 922         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 923         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 924         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 925 };
 926
 927 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 928 {
 929         if (!sbi->ll_stats)
 930                 return;
 931         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 932                 lprocfs_counter_add(sbi->ll_stats, op, count);
 933         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 934                  sbi->ll_stats_track_id == current->pid)
 935                 lprocfs_counter_add(sbi->ll_stats, op, count);
 936         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 937                  sbi->ll_stats_track_id == current->real_parent->pid)
 938                 lprocfs_counter_add(sbi->ll_stats, op, count);
 939         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 940                  sbi->ll_stats_track_id ==
 941                         from_kgid(&init_user_ns, current_gid()))
 942                 lprocfs_counter_add(sbi->ll_stats, op, count);
 943 }
 944 EXPORT_SYMBOL(ll_stats_ops_tally);
 945
 946 static const char *ra_stat_string[] = {
 947         [RA_STAT_HIT] = "hits",
 948         [RA_STAT_MISS] = "misses",
 949         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 950         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 951         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 952         [RA_STAT_FAILED_MATCH] = "failed lock match",
 953         [RA_STAT_DISCARDED] = "read but discarded",
 954         [RA_STAT_ZERO_LEN] = "zero length file",
 955         [RA_STAT_ZERO_WINDOW] = "zero size window",
 956         [RA_STAT_EOF] = "read-ahead to EOF",
 957         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 958         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 959 };
 960
 961 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 962 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 963
 964 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 965                                 struct super_block *sb, char *osc, char *mdc)
 966 {
 967         struct lprocfs_vars lvars[2];
 968         struct lustre_sb_info *lsi = s2lsi(sb);
 969         struct ll_sb_info *sbi = ll_s2sbi(sb);
 970         struct obd_device *obd;
 971         struct proc_dir_entry *dir;
 972         char name[MAX_STRING_SIZE + 1], *ptr;
 973         int err, id, len, rc;
 974
 975         memset(lvars, 0, sizeof(lvars));
 976
 977         name[MAX_STRING_SIZE] = '\0';
 978         lvars[0].name = name;
 979
 980         LASSERT(sbi != NULL);
 981         LASSERT(mdc != NULL);
 982         LASSERT(osc != NULL);
 983
 984         /* Get fsname */
 985         len = strlen(lsi->lsi_lmd->lmd_profile);
 986         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 987         if (ptr && (strcmp(ptr, "-client") == 0))
 988                 len -= 7;
 989
 990         /* Mount info */
 991         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 992                  lsi->lsi_lmd->lmd_profile, sb);
 993
 994         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 995         if (IS_ERR(sbi->ll_proc_root)) {
 996                 err = PTR_ERR(sbi->ll_proc_root);
 997                 sbi->ll_proc_root = NULL;
 998                 return err;
 999         }
1000
1001         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1002                                 &vvp_dump_pgcache_file_ops, sbi);
1003         if (rc)
1004                 CWARN("Error adding the dump_page_cache file\n");
1005
1006         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1007                                 &ll_rw_extents_stats_fops, sbi);
1008         if (rc)
1009                 CWARN("Error adding the extent_stats file\n");
1010
1011         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1012                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1013         if (rc)
1014                 CWARN("Error adding the extents_stats_per_process file\n");
1015
1016         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1017                                 &ll_rw_offset_stats_fops, sbi);
1018         if (rc)
1019                 CWARN("Error adding the offset_stats file\n");
1020
1021         /* File operations stats */
1022         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1023                                             LPROCFS_STATS_FLAG_NONE);
1024         if (sbi->ll_stats == NULL) {
1025                 err = -ENOMEM;
1026                 goto out;
1027         }
1028         /* do counter init */
1029         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1030                 __u32 type = llite_opcode_table[id].type;
1031                 void *ptr = NULL;
1032                 if (type & LPROCFS_TYPE_REGS)
1033                         ptr = "regs";
1034                 else if (type & LPROCFS_TYPE_BYTES)
1035                         ptr = "bytes";
1036                 else if (type & LPROCFS_TYPE_PAGES)
1037                         ptr = "pages";
1038                 lprocfs_counter_init(sbi->ll_stats,
1039                                      llite_opcode_table[id].opcode,
1040                                      (type & LPROCFS_CNTR_AVGMINMAX),
1041                                      llite_opcode_table[id].opname, ptr);
1042         }
1043         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1044         if (err)
1045                 goto out;
1046
1047         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1048                                                LPROCFS_STATS_FLAG_NONE);
1049         if (sbi->ll_ra_stats == NULL) {
1050                 err = -ENOMEM;
1051                 goto out;
1052         }
1053
1054         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1055                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1056                                      ra_stat_string[id], "pages");
1057         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1058                                      sbi->ll_ra_stats);
1059         if (err)
1060                 goto out;
1061
1062
1063         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1064         if (err)
1065                 goto out;
1066
1067         /* MDC info */
1068         obd = class_name2obd(mdc);
1069
1070         LASSERT(obd != NULL);
1071         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1072         LASSERT(obd->obd_type->typ_name != NULL);
1073
1074         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1075         if (dir == NULL) {
1076                 err = -ENOMEM;
1077                 goto out;
1078         }
1079
1080         snprintf(name, MAX_STRING_SIZE, "common_name");
1081         lvars[0].fops = &llite_name_fops;
1082         err = lprocfs_add_vars(dir, lvars, obd);
1083         if (err)
1084                 goto out;
1085
1086         snprintf(name, MAX_STRING_SIZE, "uuid");
1087         lvars[0].fops = &llite_uuid_fops;
1088         err = lprocfs_add_vars(dir, lvars, obd);
1089         if (err)
1090                 goto out;
1091
1092         /* OSC */
1093         obd = class_name2obd(osc);
1094
1095         LASSERT(obd != NULL);
1096         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1097         LASSERT(obd->obd_type->typ_name != NULL);
1098
1099         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1100         if (dir == NULL) {
1101                 err = -ENOMEM;
1102                 goto out;
1103         }
1104
1105         snprintf(name, MAX_STRING_SIZE, "common_name");
1106         lvars[0].fops = &llite_name_fops;
1107         err = lprocfs_add_vars(dir, lvars, obd);
1108         if (err)
1109                 goto out;
1110
1111         snprintf(name, MAX_STRING_SIZE, "uuid");
1112         lvars[0].fops = &llite_uuid_fops;
1113         err = lprocfs_add_vars(dir, lvars, obd);
1114 out:
1115         if (err) {
1116                 lprocfs_remove(&sbi->ll_proc_root);
1117                 lprocfs_free_stats(&sbi->ll_ra_stats);
1118                 lprocfs_free_stats(&sbi->ll_stats);
1119         }
1120         return err;
1121 }
1122
1123 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1124 {
1125         if (sbi->ll_proc_root) {
1126                 lprocfs_remove(&sbi->ll_proc_root);
1127                 lprocfs_free_stats(&sbi->ll_ra_stats);
1128                 lprocfs_free_stats(&sbi->ll_stats);
1129         }
1130 }
1131 #undef MAX_STRING_SIZE
1132
1133 #define pct(a, b) (b ? a * 100 / b : 0)
1134
1135 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1136                                    struct seq_file *seq, int which)
1137 {
1138         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1139         unsigned long start, end, r, w;
1140         char *unitp = "KMGTPEZY";
1141         int i, units = 10;
1142         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1143
1144         read_cum = 0;
1145         write_cum = 0;
1146         start = 0;
1147
1148         for (i = 0; i < LL_HIST_MAX; i++) {
1149                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1150                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1151         }
1152
1153         for (i = 0; i < LL_HIST_MAX; i++) {
1154                 r = pp_info->pp_r_hist.oh_buckets[i];
1155                 w = pp_info->pp_w_hist.oh_buckets[i];
1156                 read_cum += r;
1157                 write_cum += w;
1158                 end = 1 << (i + LL_HIST_START - units);
1159                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | %14lu %4lu %4lu\n",
1160                            start, *unitp, end, *unitp,
1161                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1162                            r, pct(r, read_tot), pct(read_cum, read_tot),
1163                            w, pct(w, write_tot), pct(write_cum, write_tot));
1164                 start = end;
1165                 if (start == 1<<10) {
1166                         start = 1;
1167                         units += 10;
1168                         unitp++;
1169                 }
1170                 if (read_cum == read_tot && write_cum == write_tot)
1171                         break;
1172         }
1173 }
1174
1175 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1176 {
1177         struct timeval now;
1178         struct ll_sb_info *sbi = seq->private;
1179         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1180         int k;
1181
1182         do_gettimeofday(&now);
1183
1184         if (!sbi->ll_rw_stats_on) {
1185                 seq_printf(seq, "disabled\n"
1186                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1187                 return 0;
1188         }
1189         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1190                    now.tv_sec, (unsigned long)now.tv_usec);
1191         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1192         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1193                    "extents", "calls", "%", "cum%",
1194                    "calls", "%", "cum%");
1195         spin_lock(&sbi->ll_pp_extent_lock);
1196         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1197                 if (io_extents->pp_extents[k].pid != 0) {
1198                         seq_printf(seq, "\nPID: %d\n",
1199                                    io_extents->pp_extents[k].pid);
1200                         ll_display_extents_info(io_extents, seq, k);
1201                 }
1202         }
1203         spin_unlock(&sbi->ll_pp_extent_lock);
1204         return 0;
1205 }
1206
1207 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1208                                                 const char __user *buf,
1209                                                 size_t len,
1210                                                 loff_t *off)
1211 {
1212         struct seq_file *seq = file->private_data;
1213         struct ll_sb_info *sbi = seq->private;
1214         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1215         int i;
1216         int value = 1, rc = 0;
1217
1218         if (len == 0)
1219                 return -EINVAL;
1220
1221         rc = lprocfs_write_helper(buf, len, &value);
1222         if (rc < 0 && len < 16) {
1223                 char kernbuf[16];
1224
1225                 if (copy_from_user(kernbuf, buf, len))
1226                         return -EFAULT;
1227                 kernbuf[len] = 0;
1228
1229                 if (kernbuf[len - 1] == '\n')
1230                         kernbuf[len - 1] = 0;
1231
1232                 if (strcmp(kernbuf, "disabled") == 0 ||
1233                     strcmp(kernbuf, "Disabled") == 0)
1234                         value = 0;
1235         }
1236
1237         if (value == 0)
1238                 sbi->ll_rw_stats_on = 0;
1239         else
1240                 sbi->ll_rw_stats_on = 1;
1241
1242         spin_lock(&sbi->ll_pp_extent_lock);
1243         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1244                 io_extents->pp_extents[i].pid = 0;
1245                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1246                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1247         }
1248         spin_unlock(&sbi->ll_pp_extent_lock);
1249         return len;
1250 }
1251
1252 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1253
1254 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1255 {
1256         struct timeval now;
1257         struct ll_sb_info *sbi = seq->private;
1258         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1259
1260         do_gettimeofday(&now);
1261
1262         if (!sbi->ll_rw_stats_on) {
1263                 seq_printf(seq, "disabled\n"
1264                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1265                 return 0;
1266         }
1267         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1268                    now.tv_sec, (unsigned long)now.tv_usec);
1269
1270         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1271         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1272                    "extents", "calls", "%", "cum%",
1273                    "calls", "%", "cum%");
1274         spin_lock(&sbi->ll_lock);
1275         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1276         spin_unlock(&sbi->ll_lock);
1277
1278         return 0;
1279 }
1280
1281 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1282                                              const char __user *buf,
1283                                              size_t len, loff_t *off)
1284 {
1285         struct seq_file *seq = file->private_data;
1286         struct ll_sb_info *sbi = seq->private;
1287         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1288         int i;
1289         int value = 1, rc = 0;
1290
1291         if (len == 0)
1292                 return -EINVAL;
1293
1294         rc = lprocfs_write_helper(buf, len, &value);
1295         if (rc < 0 && len < 16) {
1296                 char kernbuf[16];
1297
1298                 if (copy_from_user(kernbuf, buf, len))
1299                         return -EFAULT;
1300                 kernbuf[len] = 0;
1301
1302                 if (kernbuf[len - 1] == '\n')
1303                         kernbuf[len - 1] = 0;
1304
1305                 if (strcmp(kernbuf, "disabled") == 0 ||
1306                     strcmp(kernbuf, "Disabled") == 0)
1307                         value = 0;
1308         }
1309
1310         if (value == 0)
1311                 sbi->ll_rw_stats_on = 0;
1312         else
1313                 sbi->ll_rw_stats_on = 1;
1314
1315         spin_lock(&sbi->ll_pp_extent_lock);
1316         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1317                 io_extents->pp_extents[i].pid = 0;
1318                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1319                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1320         }
1321         spin_unlock(&sbi->ll_pp_extent_lock);
1322
1323         return len;
1324 }
1325 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1326
1327 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1328                        struct ll_file_data *file, loff_t pos,
1329                        size_t count, int rw)
1330 {
1331         int i, cur = -1;
1332         struct ll_rw_process_info *process;
1333         struct ll_rw_process_info *offset;
1334         int *off_count = &sbi->ll_rw_offset_entry_count;
1335         int *process_count = &sbi->ll_offset_process_count;
1336         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1337
1338         if (!sbi->ll_rw_stats_on)
1339                 return;
1340         process = sbi->ll_rw_process_info;
1341         offset = sbi->ll_rw_offset_info;
1342
1343         spin_lock(&sbi->ll_pp_extent_lock);
1344         /* Extent statistics */
1345         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1346                 if (io_extents->pp_extents[i].pid == pid) {
1347                         cur = i;
1348                         break;
1349                 }
1350         }
1351
1352         if (cur == -1) {
1353                 /* new process */
1354                 sbi->ll_extent_process_count =
1355                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1356                 cur = sbi->ll_extent_process_count;
1357                 io_extents->pp_extents[cur].pid = pid;
1358                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1359                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1360         }
1361
1362         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1363              (i < (LL_HIST_MAX - 1)); i++);
1364         if (rw == 0) {
1365                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1366                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1367         } else {
1368                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1369                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1370         }
1371         spin_unlock(&sbi->ll_pp_extent_lock);
1372
1373         spin_lock(&sbi->ll_process_lock);
1374         /* Offset statistics */
1375         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1376                 if (process[i].rw_pid == pid) {
1377                         if (process[i].rw_last_file != file) {
1378                                 process[i].rw_range_start = pos;
1379                                 process[i].rw_last_file_pos = pos + count;
1380                                 process[i].rw_smallest_extent = count;
1381                                 process[i].rw_largest_extent = count;
1382                                 process[i].rw_offset = 0;
1383                                 process[i].rw_last_file = file;
1384                                 spin_unlock(&sbi->ll_process_lock);
1385                                 return;
1386                         }
1387                         if (process[i].rw_last_file_pos != pos) {
1388                                 *off_count =
1389                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1390                                 offset[*off_count].rw_op = process[i].rw_op;
1391                                 offset[*off_count].rw_pid = pid;
1392                                 offset[*off_count].rw_range_start =
1393                                         process[i].rw_range_start;
1394                                 offset[*off_count].rw_range_end =
1395                                         process[i].rw_last_file_pos;
1396                                 offset[*off_count].rw_smallest_extent =
1397                                         process[i].rw_smallest_extent;
1398                                 offset[*off_count].rw_largest_extent =
1399                                         process[i].rw_largest_extent;
1400                                 offset[*off_count].rw_offset =
1401                                         process[i].rw_offset;
1402                                 process[i].rw_op = rw;
1403                                 process[i].rw_range_start = pos;
1404                                 process[i].rw_smallest_extent = count;
1405                                 process[i].rw_largest_extent = count;
1406                                 process[i].rw_offset = pos -
1407                                         process[i].rw_last_file_pos;
1408                         }
1409                         if (process[i].rw_smallest_extent > count)
1410                                 process[i].rw_smallest_extent = count;
1411                         if (process[i].rw_largest_extent < count)
1412                                 process[i].rw_largest_extent = count;
1413                         process[i].rw_last_file_pos = pos + count;
1414                         spin_unlock(&sbi->ll_process_lock);
1415                         return;
1416                 }
1417         }
1418         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1419         process[*process_count].rw_pid = pid;
1420         process[*process_count].rw_op = rw;
1421         process[*process_count].rw_range_start = pos;
1422         process[*process_count].rw_last_file_pos = pos + count;
1423         process[*process_count].rw_smallest_extent = count;
1424         process[*process_count].rw_largest_extent = count;
1425         process[*process_count].rw_offset = 0;
1426         process[*process_count].rw_last_file = file;
1427         spin_unlock(&sbi->ll_process_lock);
1428 }
1429
1430 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1431 {
1432         struct timeval now;
1433         struct ll_sb_info *sbi = seq->private;
1434         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1435         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1436         int i;
1437
1438         do_gettimeofday(&now);
1439
1440         if (!sbi->ll_rw_stats_on) {
1441                 seq_printf(seq, "disabled\n"
1442                            "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1443                 return 0;
1444         }
1445         spin_lock(&sbi->ll_process_lock);
1446
1447         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1448                    now.tv_sec, (unsigned long)now.tv_usec);
1449         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1450                    "R/W", "PID", "RANGE START", "RANGE END",
1451                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1452         /* We stored the discontiguous offsets here; print them first */
1453         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1454                 if (offset[i].rw_pid != 0)
1455                         seq_printf(seq,
1456                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1457                                    offset[i].rw_op == READ ? 'R' : 'W',
1458                                    offset[i].rw_pid,
1459                                    offset[i].rw_range_start,
1460                                    offset[i].rw_range_end,
1461                                    (unsigned long)offset[i].rw_smallest_extent,
1462                                    (unsigned long)offset[i].rw_largest_extent,
1463                                    offset[i].rw_offset);
1464         }
1465         /* Then print the current offsets for each process */
1466         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1467                 if (process[i].rw_pid != 0)
1468                         seq_printf(seq,
1469                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1470                                    process[i].rw_op == READ ? 'R' : 'W',
1471                                    process[i].rw_pid,
1472                                    process[i].rw_range_start,
1473                                    process[i].rw_last_file_pos,
1474                                    (unsigned long)process[i].rw_smallest_extent,
1475                                    (unsigned long)process[i].rw_largest_extent,
1476                                    process[i].rw_offset);
1477         }
1478         spin_unlock(&sbi->ll_process_lock);
1479
1480         return 0;
1481 }
1482
1483 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1484                                             const char __user *buf,
1485                                             size_t len, loff_t *off)
1486 {
1487         struct seq_file *seq = file->private_data;
1488         struct ll_sb_info *sbi = seq->private;
1489         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1490         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1491         int value = 1, rc = 0;
1492
1493         if (len == 0)
1494                 return -EINVAL;
1495
1496         rc = lprocfs_write_helper(buf, len, &value);
1497
1498         if (rc < 0 && len < 16) {
1499                 char kernbuf[16];
1500
1501                 if (copy_from_user(kernbuf, buf, len))
1502                         return -EFAULT;
1503                 kernbuf[len] = 0;
1504
1505                 if (kernbuf[len - 1] == '\n')
1506                         kernbuf[len - 1] = 0;
1507
1508                 if (strcmp(kernbuf, "disabled") == 0 ||
1509                     strcmp(kernbuf, "Disabled") == 0)
1510                         value = 0;
1511         }
1512
1513         if (value == 0)
1514                 sbi->ll_rw_stats_on = 0;
1515         else
1516                 sbi->ll_rw_stats_on = 1;
1517
1518         spin_lock(&sbi->ll_process_lock);
1519         sbi->ll_offset_process_count = 0;
1520         sbi->ll_rw_offset_entry_count = 0;
1521         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1522                LL_PROCESS_HIST_MAX);
1523         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1524                LL_OFFSET_HIST_MAX);
1525         spin_unlock(&sbi->ll_process_lock);
1526
1527         return len;
1528 }
1529
1530 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1531
1532 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1533 {
1534     lvars->module_vars  = NULL;
1535     lvars->obd_vars     = lprocfs_llite_obd_vars;
1536 }