lustre/llite/lproc_llite.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2015, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/version.h>
  39 #include <linux/user_namespace.h>
  40 #ifdef HAVE_UIDGID_HEADER
  41 # include <linux/uidgid.h>
  42 #endif
  43 #include <lustre_param.h>
  44 #include <lprocfs_status.h>
  45 #include <obd_support.h>
  46
  47 #include "llite_internal.h"
  48 #include "vvp_internal.h"
  49
  50 struct proc_dir_entry *proc_lustre_fs_root;
  51
  52 #ifdef CONFIG_PROC_FS
  53 /* /proc/lustre/llite mount point registration */
  54 static const struct file_operations ll_rw_extents_stats_fops;
  55 static const struct file_operations ll_rw_extents_stats_pp_fops;
  56 static const struct file_operations ll_rw_offset_stats_fops;
  57
  58 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  59 {
  60         struct super_block *sb = m->private;
  61         struct obd_statfs osfs;
  62         int rc;
  63
  64         LASSERT(sb != NULL);
  65         rc = ll_statfs_internal(sb, &osfs,
  66                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  67                                 OBD_STATFS_NODELAY);
  68         if (!rc)
  69                 seq_printf(m, "%u\n", osfs.os_bsize);
  70         return rc;
  71 }
  72 LPROC_SEQ_FOPS_RO(ll_blksize);
  73
  74 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  75 {
  76         struct super_block *sb = m->private;
  77         struct obd_statfs osfs;
  78         int rc;
  79
  80         LASSERT(sb != NULL);
  81         rc = ll_statfs_internal(sb, &osfs,
  82                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  83                                 OBD_STATFS_NODELAY);
  84         if (!rc) {
  85                 __u32 blk_size = osfs.os_bsize >> 10;
  86                 __u64 result = osfs.os_blocks;
  87
  88                 while (blk_size >>= 1)
  89                         result <<= 1;
  90
  91                 seq_printf(m, LPU64"\n", result);
  92         }
  93         return rc;
  94 }
  95 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  96
  97 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  98 {
  99         struct super_block *sb = m->private;
 100         struct obd_statfs osfs;
 101         int rc;
 102
 103         LASSERT(sb != NULL);
 104         rc = ll_statfs_internal(sb, &osfs,
 105                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 106                                 OBD_STATFS_NODELAY);
 107         if (!rc) {
 108                 __u32 blk_size = osfs.os_bsize >> 10;
 109                 __u64 result = osfs.os_bfree;
 110
 111                 while (blk_size >>= 1)
 112                         result <<= 1;
 113
 114                 seq_printf(m, LPU64"\n", result);
 115         }
 116         return rc;
 117 }
 118 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 119
 120 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 121 {
 122         struct super_block *sb = m->private;
 123         struct obd_statfs osfs;
 124         int rc;
 125
 126         LASSERT(sb != NULL);
 127         rc = ll_statfs_internal(sb, &osfs,
 128                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 129                                 OBD_STATFS_NODELAY);
 130         if (!rc) {
 131                 __u32 blk_size = osfs.os_bsize >> 10;
 132                 __u64 result = osfs.os_bavail;
 133
 134                 while (blk_size >>= 1)
 135                         result <<= 1;
 136
 137                 seq_printf(m, LPU64"\n", result);
 138         }
 139         return rc;
 140 }
 141 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 142
 143 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 144 {
 145         struct super_block *sb = m->private;
 146         struct obd_statfs osfs;
 147         int rc;
 148
 149         LASSERT(sb != NULL);
 150         rc = ll_statfs_internal(sb, &osfs,
 151                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 152                                 OBD_STATFS_NODELAY);
 153         if (!rc)
 154                 seq_printf(m, LPU64"\n", osfs.os_files);
 155         return rc;
 156 }
 157 LPROC_SEQ_FOPS_RO(ll_filestotal);
 158
 159 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 160 {
 161         struct super_block *sb = m->private;
 162         struct obd_statfs osfs;
 163         int rc;
 164
 165         LASSERT(sb != NULL);
 166         rc = ll_statfs_internal(sb, &osfs,
 167                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 168                                 OBD_STATFS_NODELAY);
 169         if (!rc)
 170                 seq_printf(m, LPU64"\n", osfs.os_ffree);
 171         return rc;
 172 }
 173 LPROC_SEQ_FOPS_RO(ll_filesfree);
 174
 175 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 176 {
 177         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 178
 179         LASSERT(sbi != NULL);
 180
 181         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 182                 seq_puts(m, "remote client\n");
 183         else
 184                 seq_puts(m, "local client\n");
 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 = 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 = 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_xattr_cache_seq_show(struct seq_file *m, void *v)
 210 {
 211         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 212
 213         seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 214         return 0;
 215 }
 216
 217 static ssize_t ll_xattr_cache_seq_write(struct file *file,
 218                                         const char __user *buffer,
 219                                         size_t count, loff_t *off)
 220 {
 221         struct seq_file *m = file->private_data;
 222         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 223         int val, rc;
 224
 225         rc = lprocfs_write_helper(buffer, count, &val);
 226         if (rc)
 227                 return rc;
 228
 229         if (val != 0 && val != 1)
 230                 return -ERANGE;
 231
 232         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 233                 return -ENOTSUPP;
 234
 235         sbi->ll_xattr_cache_enabled = val;
 236
 237         return count;
 238 }
 239 LPROC_SEQ_FOPS(ll_xattr_cache);
 240
 241 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 242 {
 243         struct super_block *sb = m->private;
 244
 245         /*
 246          * See description of statistical counters in struct cl_site, and
 247          * struct lu_site.
 248          */
 249         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 250 }
 251 LPROC_SEQ_FOPS_RO(ll_site_stats);
 252
 253 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 254 {
 255         struct super_block *sb = m->private;
 256         struct ll_sb_info *sbi = ll_s2sbi(sb);
 257         long pages_number;
 258         int mult;
 259
 260         spin_lock(&sbi->ll_lock);
 261         pages_number = sbi->ll_ra_info.ra_max_pages;
 262         spin_unlock(&sbi->ll_lock);
 263
 264         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 265         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 266 }
 267
 268 static ssize_t
 269 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
 270                               size_t count, loff_t *off)
 271 {
 272         struct seq_file *m = file->private_data;
 273         struct super_block *sb = m->private;
 274         struct ll_sb_info *sbi = ll_s2sbi(sb);
 275         __u64 val;
 276         long pages_number;
 277         int pages_shift;
 278         int rc;
 279
 280         pages_shift = 20 - PAGE_CACHE_SHIFT;
 281         rc = lprocfs_write_frac_u64_helper(buffer, count, &val,
 282                                            1 << pages_shift);
 283         if (rc)
 284                 return rc;
 285
 286         if (val > LONG_MAX)
 287                 return -ERANGE;
 288         pages_number = (long)val;
 289
 290         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 291                 /* 1/2 of RAM */
 292                 CERROR("%s: can't set max_readahead_mb=%lu > %luMB\n",
 293                        ll_get_fsname(sb, NULL, 0), pages_number >> pages_shift,
 294                        totalram_pages >> (pages_shift + 1));
 295                 return -ERANGE;
 296         }
 297
 298         spin_lock(&sbi->ll_lock);
 299         sbi->ll_ra_info.ra_max_pages = pages_number;
 300         spin_unlock(&sbi->ll_lock);
 301         return count;
 302 }
 303 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 304
 305 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 306 {
 307         struct super_block *sb = m->private;
 308         struct ll_sb_info *sbi = ll_s2sbi(sb);
 309         long pages_number;
 310         int mult;
 311
 312         spin_lock(&sbi->ll_lock);
 313         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 314         spin_unlock(&sbi->ll_lock);
 315
 316         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 317         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 318 }
 319
 320 static ssize_t
 321 ll_max_readahead_per_file_mb_seq_write(struct file *file,
 322                                        const char __user *buffer,
 323                                        size_t count, loff_t *off)
 324 {
 325         struct seq_file *m = file->private_data;
 326         struct super_block *sb = m->private;
 327         struct ll_sb_info *sbi = ll_s2sbi(sb);
 328         int pages_shift, rc, pages_number;
 329
 330         pages_shift = 20 - PAGE_CACHE_SHIFT;
 331         rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
 332                                        1 << pages_shift);
 333         if (rc)
 334                 return rc;
 335
 336         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
 337                 CERROR("%s: can't set max_readahead_per_file_mb=%u > "
 338                        "max_read_ahead_mb=%lu\n", ll_get_fsname(sb, NULL, 0),
 339                        pages_number >> pages_shift,
 340                        sbi->ll_ra_info.ra_max_pages >> pages_shift);
 341                 return -ERANGE;
 342         }
 343
 344         spin_lock(&sbi->ll_lock);
 345         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 346         spin_unlock(&sbi->ll_lock);
 347         return count;
 348 }
 349 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 350
 351 static int ll_max_read_ahead_whole_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         long pages_number;
 356         int mult;
 357
 358         spin_lock(&sbi->ll_lock);
 359         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 360         spin_unlock(&sbi->ll_lock);
 361
 362         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 363         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 364 }
 365
 366 static ssize_t
 367 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 368                                      const char __user *buffer,
 369                                      size_t count, loff_t *off)
 370 {
 371         struct seq_file *m = file->private_data;
 372         struct super_block *sb = m->private;
 373         struct ll_sb_info *sbi = ll_s2sbi(sb);
 374         int pages_shift, rc, pages_number;
 375
 376         pages_shift = 20 - PAGE_CACHE_SHIFT;
 377         rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
 378                                        1 << pages_shift);
 379         if (rc)
 380                 return rc;
 381
 382         /* Cap this at the current max readahead window size, the readahead
 383          * algorithm does this anyway so it's pointless to set it larger. */
 384         if (pages_number < 0 ||
 385             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 386                 CERROR("%s: can't set max_read_ahead_whole_mb=%u > "
 387                        "max_read_ahead_per_file_mb=%lu\n",
 388                        ll_get_fsname(sb, NULL, 0),
 389                        pages_number >> pages_shift,
 390                        sbi->ll_ra_info.ra_max_pages_per_file >> pages_shift);
 391                 return -ERANGE;
 392         }
 393
 394         spin_lock(&sbi->ll_lock);
 395         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 396         spin_unlock(&sbi->ll_lock);
 397         return count;
 398 }
 399 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 400
 401 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 402 {
 403         struct super_block     *sb    = m->private;
 404         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 405         struct cl_client_cache *cache = sbi->ll_cache;
 406         int shift = 20 - PAGE_CACHE_SHIFT;
 407         long max_cached_mb;
 408         long unused_mb;
 409
 410         max_cached_mb = cache->ccc_lru_max >> shift;
 411         unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift;
 412         seq_printf(m, "users: %d\n"
 413                    "max_cached_mb: %ld\n"
 414                    "used_mb: %ld\n"
 415                    "unused_mb: %ld\n"
 416                    "reclaim_count: %u\n",
 417                    atomic_read(&cache->ccc_users),
 418                    max_cached_mb,
 419                    max_cached_mb - unused_mb,
 420                    unused_mb,
 421                    cache->ccc_lru_shrinkers);
 422         return 0;
 423 }
 424
 425 static ssize_t
 426 ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer,
 427                            size_t count, loff_t *off)
 428 {
 429         struct seq_file *m = file->private_data;
 430         struct super_block *sb = m->private;
 431         struct ll_sb_info *sbi = ll_s2sbi(sb);
 432         struct cl_client_cache *cache = sbi->ll_cache;
 433         struct lu_env *env;
 434         __u64 val;
 435         long diff = 0;
 436         long nrpages = 0;
 437         long pages_number;
 438         __u16 refcheck;
 439         int mult;
 440         long rc;
 441         char kernbuf[128];
 442         ENTRY;
 443
 444         if (count >= sizeof(kernbuf))
 445                 RETURN(-EINVAL);
 446
 447         if (copy_from_user(kernbuf, buffer, count))
 448                 RETURN(-EFAULT);
 449         kernbuf[count] = 0;
 450
 451         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 452         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 453                   kernbuf;
 454         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
 455         if (rc)
 456                 RETURN(rc);
 457
 458         if (val > LONG_MAX)
 459                 return -ERANGE;
 460         pages_number = (long)val;
 461
 462         if (pages_number < 0 || pages_number > totalram_pages) {
 463                 CERROR("%s: can't set max cache more than %lu MB\n",
 464                        ll_get_fsname(sb, NULL, 0),
 465                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 466                 RETURN(-ERANGE);
 467         }
 468         /* Allow enough cache so clients can make well-formed RPCs */
 469         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 470
 471         spin_lock(&sbi->ll_lock);
 472         diff = pages_number - cache->ccc_lru_max;
 473         spin_unlock(&sbi->ll_lock);
 474
 475         /* easy - add more LRU slots. */
 476         if (diff >= 0) {
 477                 atomic_long_add(diff, &cache->ccc_lru_left);
 478                 GOTO(out, rc = 0);
 479         }
 480
 481         env = cl_env_get(&refcheck);
 482         if (IS_ERR(env))
 483                 RETURN(rc);
 484
 485         diff = -diff;
 486         while (diff > 0) {
 487                 long tmp;
 488
 489                 /* reduce LRU budget from free slots. */
 490                 do {
 491                         long ov, nv;
 492
 493                         ov = atomic_long_read(&cache->ccc_lru_left);
 494                         if (ov == 0)
 495                                 break;
 496
 497                         nv = ov > diff ? ov - diff : 0;
 498                         rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
 499                         if (likely(ov == rc)) {
 500                                 diff -= ov - nv;
 501                                 nrpages += ov - nv;
 502                                 break;
 503                         }
 504                 } while (1);
 505
 506                 if (diff <= 0)
 507                         break;
 508
 509                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 510                         rc = -ENODEV;
 511                         break;
 512                 }
 513
 514                 /* difficult - have to ask OSCs to drop LRU slots. */
 515                 tmp = diff << 1;
 516                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 517                                 sizeof(KEY_CACHE_LRU_SHRINK),
 518                                 KEY_CACHE_LRU_SHRINK,
 519                                 sizeof(tmp), &tmp, NULL);
 520                 if (rc < 0)
 521                         break;
 522         }
 523         cl_env_put(env, &refcheck);
 524
 525 out:
 526         if (rc >= 0) {
 527                 spin_lock(&sbi->ll_lock);
 528                 cache->ccc_lru_max = pages_number;
 529                 spin_unlock(&sbi->ll_lock);
 530                 rc = count;
 531         } else {
 532                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 533         }
 534         return rc;
 535 }
 536 LPROC_SEQ_FOPS(ll_max_cached_mb);
 537
 538 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 539 {
 540         struct super_block *sb = m->private;
 541         struct ll_sb_info *sbi = ll_s2sbi(sb);
 542
 543         seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 544         return 0;
 545 }
 546
 547 static ssize_t ll_checksum_seq_write(struct file *file,
 548                                      const char __user *buffer,
 549                                      size_t count, loff_t *off)
 550 {
 551         struct seq_file *m = file->private_data;
 552         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 553         int val, rc;
 554
 555         if (!sbi->ll_dt_exp)
 556                 /* Not set up yet */
 557                 return -EAGAIN;
 558
 559         rc = lprocfs_write_helper(buffer, count, &val);
 560         if (rc)
 561                 return rc;
 562         if (val)
 563                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 564         else
 565                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 566
 567         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 568                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 569         if (rc)
 570                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 571
 572         return count;
 573 }
 574 LPROC_SEQ_FOPS(ll_checksum);
 575
 576 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 577 {
 578         struct super_block *sb = m->private;
 579
 580         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 581                 seq_printf(m, "%d\n",
 582                            ll_s2sbi(sb)->ll_stats_track_id);
 583         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 584                 seq_puts(m, "0 (all)\n");
 585         } else {
 586                 seq_puts(m, "untracked\n");
 587         }
 588         return 0;
 589 }
 590
 591 static int ll_wr_track_id(const char __user *buffer, unsigned long count,
 592                           void *data, enum stats_track_type type)
 593 {
 594         struct super_block *sb = data;
 595         int rc, pid;
 596
 597         rc = lprocfs_write_helper(buffer, count, &pid);
 598         if (rc)
 599                 return rc;
 600         ll_s2sbi(sb)->ll_stats_track_id = pid;
 601         if (pid == 0)
 602                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 603         else
 604                 ll_s2sbi(sb)->ll_stats_track_type = type;
 605         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 606         return count;
 607 }
 608
 609 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 610 {
 611         return ll_rd_track_id(m, STATS_TRACK_PID);
 612 }
 613
 614 static ssize_t ll_track_pid_seq_write(struct file *file,
 615                                       const char __user *buffer,
 616                                       size_t count, loff_t *off)
 617 {
 618         struct seq_file *seq = file->private_data;
 619         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 620 }
 621 LPROC_SEQ_FOPS(ll_track_pid);
 622
 623 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 624 {
 625         return ll_rd_track_id(m, STATS_TRACK_PPID);
 626 }
 627
 628 static ssize_t ll_track_ppid_seq_write(struct file *file,
 629                                        const char __user *buffer,
 630                                        size_t count, loff_t *off)
 631 {
 632         struct seq_file *seq = file->private_data;
 633         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 634 }
 635 LPROC_SEQ_FOPS(ll_track_ppid);
 636
 637 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 638 {
 639         return ll_rd_track_id(m, STATS_TRACK_GID);
 640 }
 641
 642 static ssize_t ll_track_gid_seq_write(struct file *file,
 643                                       const char __user *buffer,
 644                                       size_t count, loff_t *off)
 645 {
 646         struct seq_file *seq = file->private_data;
 647         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 648 }
 649 LPROC_SEQ_FOPS(ll_track_gid);
 650
 651 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 652 {
 653         struct super_block *sb = m->private;
 654         struct ll_sb_info *sbi = ll_s2sbi(sb);
 655
 656         seq_printf(m, "%u\n", sbi->ll_sa_max);
 657         return 0;
 658 }
 659
 660 static ssize_t ll_statahead_max_seq_write(struct file *file,
 661                                           const char __user *buffer,
 662                                           size_t count, loff_t *off)
 663 {
 664         struct seq_file *m = file->private_data;
 665         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 666         int val, rc;
 667
 668         rc = lprocfs_write_helper(buffer, count, &val);
 669         if (rc)
 670                 return rc;
 671
 672         if (val >= 0 && val <= LL_SA_RPC_MAX)
 673                 sbi->ll_sa_max = val;
 674         else
 675                 CERROR("Bad statahead_max value %d. Valid values are in the "
 676                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 677
 678         return count;
 679 }
 680 LPROC_SEQ_FOPS(ll_statahead_max);
 681
 682 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 683 {
 684         struct super_block *sb = m->private;
 685         struct ll_sb_info *sbi = ll_s2sbi(sb);
 686
 687         seq_printf(m, "%u\n",
 688                    sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 689         return 0;
 690 }
 691
 692 static ssize_t ll_statahead_agl_seq_write(struct file *file,
 693                                           const char __user *buffer,
 694                                           size_t count, loff_t *off)
 695 {
 696         struct seq_file *m = file->private_data;
 697         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 698         int val, rc;
 699
 700         rc = lprocfs_write_helper(buffer, count, &val);
 701         if (rc)
 702                 return rc;
 703
 704         if (val)
 705                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 706         else
 707                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 708
 709         return count;
 710 }
 711 LPROC_SEQ_FOPS(ll_statahead_agl);
 712
 713 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 714 {
 715         struct super_block *sb = m->private;
 716         struct ll_sb_info *sbi = ll_s2sbi(sb);
 717
 718         seq_printf(m, "statahead total: %u\n"
 719                     "statahead wrong: %u\n"
 720                     "agl total: %u\n",
 721                     atomic_read(&sbi->ll_sa_total),
 722                     atomic_read(&sbi->ll_sa_wrong),
 723                     atomic_read(&sbi->ll_agl_total));
 724         return 0;
 725 }
 726 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 727
 728 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 729 {
 730         struct super_block *sb = m->private;
 731         struct ll_sb_info *sbi = ll_s2sbi(sb);
 732
 733         seq_printf(m, "%u\n",
 734                    (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 735         return 0;
 736 }
 737
 738 static ssize_t ll_lazystatfs_seq_write(struct file *file,
 739                                        const char __user *buffer,
 740                                         size_t count, loff_t *off)
 741 {
 742         struct seq_file *m = file->private_data;
 743         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 744         int val, rc;
 745
 746         rc = lprocfs_write_helper(buffer, count, &val);
 747         if (rc)
 748                 return rc;
 749
 750         if (val)
 751                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 752         else
 753                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 754
 755         return count;
 756 }
 757 LPROC_SEQ_FOPS(ll_lazystatfs);
 758
 759 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 760 {
 761         struct super_block *sb = m->private;
 762         struct ll_sb_info *sbi = ll_s2sbi(sb);
 763         unsigned int ealen;
 764         int rc;
 765
 766         rc = ll_get_max_mdsize(sbi, &ealen);
 767         if (rc)
 768                 return rc;
 769
 770         seq_printf(m, "%u\n", ealen);
 771         return 0;
 772 }
 773 LPROC_SEQ_FOPS_RO(ll_max_easize);
 774
 775 /**
 776  * Get default_easize.
 777  *
 778  * \see client_obd::cl_default_mds_easize
 779  *
 780  * \param[in] m         seq_file handle
 781  * \param[in] v         unused for single entry
 782  *
 783  * \retval 0            on success
 784  * \retval negative     negated errno on failure
 785  */
 786 static int ll_default_easize_seq_show(struct seq_file *m, void *v)
 787 {
 788         struct super_block *sb = m->private;
 789         struct ll_sb_info *sbi = ll_s2sbi(sb);
 790         unsigned int ealen;
 791         int rc;
 792
 793         rc = ll_get_default_mdsize(sbi, &ealen);
 794         if (rc)
 795                 return rc;
 796
 797         seq_printf(m, "%u\n", ealen);
 798         return 0;
 799 }
 800
 801 /**
 802  * Set default_easize.
 803  *
 804  * Range checking on the passed value is handled by
 805  * ll_set_default_mdsize().
 806  *
 807  * \see client_obd::cl_default_mds_easize
 808  *
 809  * \param[in] file      proc file
 810  * \param[in] buffer    string passed from user space
 811  * \param[in] count     \a buffer length
 812  * \param[in] off       unused for single entry
 813  *
 814  * \retval positive     \a count on success
 815  * \retval negative     negated errno on failure
 816  */
 817 static ssize_t ll_default_easize_seq_write(struct file *file,
 818                                            const char __user *buffer,
 819                                            size_t count, loff_t *unused)
 820 {
 821         struct seq_file         *seq = file->private_data;
 822         struct super_block      *sb = (struct super_block *)seq->private;
 823         struct ll_sb_info       *sbi = ll_s2sbi(sb);
 824         int                      val;
 825         int                      rc;
 826
 827         if (count == 0)
 828                 return 0;
 829
 830         rc = lprocfs_write_helper(buffer, count, &val);
 831         if (rc < 0)
 832                 return rc;
 833
 834         rc = ll_set_default_mdsize(sbi, val);
 835         if (rc)
 836                 return rc;
 837
 838         return count;
 839 }
 840 LPROC_SEQ_FOPS(ll_default_easize);
 841
 842 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 843 {
 844         const char *str[] = LL_SBI_FLAGS;
 845         struct super_block *sb = m->private;
 846         int flags = ll_s2sbi(sb)->ll_flags;
 847         int i = 0;
 848
 849         while (flags != 0) {
 850                 if (ARRAY_SIZE(str) <= i) {
 851                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 852                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 853                         return -EINVAL;
 854                 }
 855
 856                 if (flags & 0x1)
 857                         seq_printf(m, "%s ", str[i]);
 858                 flags >>= 1;
 859                 ++i;
 860         }
 861         seq_printf(m, "\b\n");
 862         return 0;
 863 }
 864 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 865
 866 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 867 {
 868         struct super_block      *sb    = m->private;
 869         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 870         struct cl_client_cache  *cache = sbi->ll_cache;
 871         long pages;
 872         int mb;
 873
 874         pages = atomic_long_read(&cache->ccc_unstable_nr);
 875         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 876
 877         seq_printf(m, "unstable_check:     %8d\n"
 878                    "unstable_pages: %12ld\n"
 879                    "unstable_mb:        %8d\n",
 880                    cache->ccc_unstable_check, pages, mb);
 881         return 0;
 882 }
 883
 884 static ssize_t ll_unstable_stats_seq_write(struct file *file,
 885                                            const char __user *buffer,
 886                                            size_t count, loff_t *unused)
 887 {
 888         struct seq_file *seq = file->private_data;
 889         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
 890         char kernbuf[128];
 891         int val, rc;
 892
 893         if (count == 0)
 894                 return 0;
 895         if (count >= sizeof(kernbuf))
 896                 return -EINVAL;
 897
 898         if (copy_from_user(kernbuf, buffer, count))
 899                 return -EFAULT;
 900         kernbuf[count] = 0;
 901
 902         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
 903                   kernbuf;
 904         rc = lprocfs_write_helper(buffer, count, &val);
 905         if (rc < 0)
 906                 return rc;
 907
 908         /* borrow lru lock to set the value */
 909         spin_lock(&sbi->ll_cache->ccc_lru_lock);
 910         sbi->ll_cache->ccc_unstable_check = !!val;
 911         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
 912
 913         return count;
 914 }
 915 LPROC_SEQ_FOPS(ll_unstable_stats);
 916
 917 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
 918 {
 919         struct super_block *sb = m->private;
 920         struct ll_sb_info *sbi = ll_s2sbi(sb);
 921         struct root_squash_info *squash = &sbi->ll_squash;
 922
 923         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
 924         return 0;
 925 }
 926
 927 static ssize_t ll_root_squash_seq_write(struct file *file,
 928                                         const char __user *buffer,
 929                                         size_t count, loff_t *off)
 930 {
 931         struct seq_file *m = file->private_data;
 932         struct super_block *sb = m->private;
 933         struct ll_sb_info *sbi = ll_s2sbi(sb);
 934         struct root_squash_info *squash = &sbi->ll_squash;
 935
 936         return lprocfs_wr_root_squash(buffer, count, squash,
 937                                       ll_get_fsname(sb, NULL, 0));
 938 }
 939 LPROC_SEQ_FOPS(ll_root_squash);
 940
 941 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
 942 {
 943         struct super_block *sb = m->private;
 944         struct ll_sb_info *sbi = ll_s2sbi(sb);
 945         struct root_squash_info *squash = &sbi->ll_squash;
 946         int len;
 947
 948         down_read(&squash->rsi_sem);
 949         if (!list_empty(&squash->rsi_nosquash_nids)) {
 950                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
 951                                         &squash->rsi_nosquash_nids);
 952                 m->count += len;
 953                 seq_putc(m, '\n');
 954         } else {
 955                 seq_puts(m, "NONE\n");
 956         }
 957         up_read(&squash->rsi_sem);
 958
 959         return 0;
 960 }
 961
 962 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
 963                                           const char __user *buffer,
 964                                           size_t count, loff_t *off)
 965 {
 966         struct seq_file *m = file->private_data;
 967         struct super_block *sb = m->private;
 968         struct ll_sb_info *sbi = ll_s2sbi(sb);
 969         struct root_squash_info *squash = &sbi->ll_squash;
 970         int rc;
 971
 972         rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
 973                                       ll_get_fsname(sb, NULL, 0));
 974         if (rc < 0)
 975                 return rc;
 976
 977         ll_compute_rootsquash_state(sbi);
 978
 979         return rc;
 980 }
 981 LPROC_SEQ_FOPS(ll_nosquash_nids);
 982
 983 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 984         { .name =       "uuid",
 985           .fops =       &ll_sb_uuid_fops                        },
 986         { .name =       "fstype",
 987           .fops =       &ll_fstype_fops                         },
 988         { .name =       "site",
 989           .fops =       &ll_site_stats_fops                     },
 990         { .name =       "blocksize",
 991           .fops =       &ll_blksize_fops                        },
 992         { .name =       "kbytestotal",
 993           .fops =       &ll_kbytestotal_fops                    },
 994         { .name =       "kbytesfree",
 995           .fops =       &ll_kbytesfree_fops                     },
 996         { .name =       "kbytesavail",
 997           .fops =       &ll_kbytesavail_fops                    },
 998         { .name =       "filestotal",
 999           .fops =       &ll_filestotal_fops                     },
1000         { .name =       "filesfree",
1001           .fops =       &ll_filesfree_fops                      },
1002         { .name =       "client_type",
1003           .fops =       &ll_client_type_fops                    },
1004         { .name =       "max_read_ahead_mb",
1005           .fops =       &ll_max_readahead_mb_fops               },
1006         { .name =       "max_read_ahead_per_file_mb",
1007           .fops =       &ll_max_readahead_per_file_mb_fops      },
1008         { .name =       "max_read_ahead_whole_mb",
1009           .fops =       &ll_max_read_ahead_whole_mb_fops        },
1010         { .name =       "max_cached_mb",
1011           .fops =       &ll_max_cached_mb_fops                  },
1012         { .name =       "checksum_pages",
1013           .fops =       &ll_checksum_fops                       },
1014         { .name =       "stats_track_pid",
1015           .fops =       &ll_track_pid_fops                      },
1016         { .name =       "stats_track_ppid",
1017           .fops =       &ll_track_ppid_fops                     },
1018         { .name =       "stats_track_gid",
1019           .fops =       &ll_track_gid_fops                      },
1020         { .name =       "statahead_max",
1021           .fops =       &ll_statahead_max_fops                  },
1022         { .name =       "statahead_agl",
1023           .fops =       &ll_statahead_agl_fops                  },
1024         { .name =       "statahead_stats",
1025           .fops =       &ll_statahead_stats_fops                },
1026         { .name =       "lazystatfs",
1027           .fops =       &ll_lazystatfs_fops                     },
1028         { .name =       "max_easize",
1029           .fops =       &ll_max_easize_fops                     },
1030         { .name =       "default_easize",
1031           .fops =       &ll_default_easize_fops                 },
1032         { .name =       "sbi_flags",
1033           .fops =       &ll_sbi_flags_fops                      },
1034         { .name =       "xattr_cache",
1035           .fops =       &ll_xattr_cache_fops                    },
1036         { .name =       "unstable_stats",
1037           .fops =       &ll_unstable_stats_fops                 },
1038         { .name =       "root_squash",
1039           .fops =       &ll_root_squash_fops                    },
1040         { .name =       "nosquash_nids",
1041           .fops =       &ll_nosquash_nids_fops                  },
1042         { NULL }
1043 };
1044
1045 #define MAX_STRING_SIZE 128
1046
1047 static const struct llite_file_opcode {
1048         __u32       opcode;
1049         __u32       type;
1050         const char *opname;
1051 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1052         /* file operation */
1053         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1054         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1055         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1056                                    "read_bytes" },
1057         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1058                                    "write_bytes" },
1059         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1060                                    "brw_read" },
1061         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1062                                    "brw_write" },
1063         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
1064         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
1065         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
1066         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
1067         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
1068         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
1069         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
1070         /* inode operation */
1071         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
1072         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
1073         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
1074         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
1075         /* dir inode operation */
1076         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
1077         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
1078         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
1079         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
1080         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
1081         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
1082         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
1083         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
1084         /* special inode operation */
1085         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
1086         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
1087         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
1088         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
1089         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
1090         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
1091         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
1092         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
1093 };
1094
1095 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1096 {
1097         if (!sbi->ll_stats)
1098                 return;
1099         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1100                 lprocfs_counter_add(sbi->ll_stats, op, count);
1101         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1102                  sbi->ll_stats_track_id == current->pid)
1103                 lprocfs_counter_add(sbi->ll_stats, op, count);
1104         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1105                  sbi->ll_stats_track_id == current->parent->pid)
1106                 lprocfs_counter_add(sbi->ll_stats, op, count);
1107         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1108                  sbi->ll_stats_track_id ==
1109                         from_kgid(&init_user_ns, current_gid()))
1110                 lprocfs_counter_add(sbi->ll_stats, op, count);
1111 }
1112 EXPORT_SYMBOL(ll_stats_ops_tally);
1113
1114 static const char *ra_stat_string[] = {
1115         [RA_STAT_HIT] = "hits",
1116         [RA_STAT_MISS] = "misses",
1117         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1118         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1119         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1120         [RA_STAT_FAILED_MATCH] = "failed lock match",
1121         [RA_STAT_DISCARDED] = "read but discarded",
1122         [RA_STAT_ZERO_LEN] = "zero length file",
1123         [RA_STAT_ZERO_WINDOW] = "zero size window",
1124         [RA_STAT_EOF] = "read-ahead to EOF",
1125         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1126         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1127         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1128 };
1129
1130 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1131 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1132
1133 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
1134                                 struct super_block *sb, char *osc, char *mdc)
1135 {
1136         struct lprocfs_vars lvars[2];
1137         struct lustre_sb_info *lsi = s2lsi(sb);
1138         struct ll_sb_info *sbi = ll_s2sbi(sb);
1139         struct obd_device *obd;
1140         struct proc_dir_entry *dir;
1141         char name[MAX_STRING_SIZE + 1], *ptr;
1142         int err, id, len, rc;
1143         ENTRY;
1144
1145         memset(lvars, 0, sizeof(lvars));
1146
1147         name[MAX_STRING_SIZE] = '\0';
1148         lvars[0].name = name;
1149
1150         LASSERT(sbi != NULL);
1151         LASSERT(mdc != NULL);
1152         LASSERT(osc != NULL);
1153
1154         /* Get fsname */
1155         len = strlen(lsi->lsi_lmd->lmd_profile);
1156         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1157         if (ptr && (strcmp(ptr, "-client") == 0))
1158                 len -= 7;
1159
1160         /* Mount info */
1161         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1162                  lsi->lsi_lmd->lmd_profile, sb);
1163
1164         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
1165         if (IS_ERR(sbi->ll_proc_root)) {
1166                 err = PTR_ERR(sbi->ll_proc_root);
1167                 sbi->ll_proc_root = NULL;
1168                 RETURN(err);
1169         }
1170
1171         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1172                                 &vvp_dump_pgcache_file_ops, sbi);
1173         if (rc)
1174                 CWARN("Error adding the dump_page_cache file\n");
1175
1176         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1177                                 &ll_rw_extents_stats_fops, sbi);
1178         if (rc)
1179                 CWARN("Error adding the extent_stats file\n");
1180
1181         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1182                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1183         if (rc)
1184                 CWARN("Error adding the extents_stats_per_process file\n");
1185
1186         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1187                                 &ll_rw_offset_stats_fops, sbi);
1188         if (rc)
1189                 CWARN("Error adding the offset_stats file\n");
1190
1191         /* File operations stats */
1192         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1193                                             LPROCFS_STATS_FLAG_NONE);
1194         if (sbi->ll_stats == NULL)
1195                 GOTO(out, err = -ENOMEM);
1196         /* do counter init */
1197         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1198                 __u32 type = llite_opcode_table[id].type;
1199                 void *ptr = NULL;
1200                 if (type & LPROCFS_TYPE_REGS)
1201                         ptr = "regs";
1202                 else if (type & LPROCFS_TYPE_BYTES)
1203                         ptr = "bytes";
1204                 else if (type & LPROCFS_TYPE_PAGES)
1205                         ptr = "pages";
1206                 lprocfs_counter_init(sbi->ll_stats,
1207                                      llite_opcode_table[id].opcode,
1208                                      (type & LPROCFS_CNTR_AVGMINMAX),
1209                                      llite_opcode_table[id].opname, ptr);
1210         }
1211         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1212         if (err)
1213                 GOTO(out, err);
1214
1215         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1216                                                LPROCFS_STATS_FLAG_NONE);
1217         if (sbi->ll_ra_stats == NULL)
1218                 GOTO(out, err = -ENOMEM);
1219
1220         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1221                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1222                                      ra_stat_string[id], "pages");
1223         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1224                                      sbi->ll_ra_stats);
1225         if (err)
1226                 GOTO(out, err);
1227
1228
1229         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1230         if (err)
1231                 GOTO(out, err);
1232
1233         /* MDC info */
1234         obd = class_name2obd(mdc);
1235
1236         LASSERT(obd != NULL);
1237         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1238         LASSERT(obd->obd_type->typ_name != NULL);
1239
1240         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1241         if (dir == NULL)
1242                 GOTO(out, err = -ENOMEM);
1243
1244         snprintf(name, MAX_STRING_SIZE, "common_name");
1245         lvars[0].fops = &llite_name_fops;
1246         err = lprocfs_add_vars(dir, lvars, obd);
1247         if (err)
1248                 GOTO(out, err);
1249
1250         snprintf(name, MAX_STRING_SIZE, "uuid");
1251         lvars[0].fops = &llite_uuid_fops;
1252         err = lprocfs_add_vars(dir, lvars, obd);
1253         if (err)
1254                 GOTO(out, err);
1255
1256         /* OSC */
1257         obd = class_name2obd(osc);
1258
1259         LASSERT(obd != NULL);
1260         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1261         LASSERT(obd->obd_type->typ_name != NULL);
1262
1263         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1264         if (dir == NULL)
1265                 GOTO(out, err = -ENOMEM);
1266
1267         snprintf(name, MAX_STRING_SIZE, "common_name");
1268         lvars[0].fops = &llite_name_fops;
1269         err = lprocfs_add_vars(dir, lvars, obd);
1270         if (err)
1271                 GOTO(out, err);
1272
1273         snprintf(name, MAX_STRING_SIZE, "uuid");
1274         lvars[0].fops = &llite_uuid_fops;
1275         err = lprocfs_add_vars(dir, lvars, obd);
1276 out:
1277         if (err) {
1278                 lprocfs_remove(&sbi->ll_proc_root);
1279                 lprocfs_free_stats(&sbi->ll_ra_stats);
1280                 lprocfs_free_stats(&sbi->ll_stats);
1281         }
1282         RETURN(err);
1283 }
1284
1285 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1286 {
1287         if (sbi->ll_proc_root) {
1288                 lprocfs_remove(&sbi->ll_proc_root);
1289                 lprocfs_free_stats(&sbi->ll_ra_stats);
1290                 lprocfs_free_stats(&sbi->ll_stats);
1291         }
1292 }
1293 #undef MAX_STRING_SIZE
1294
1295 #define pct(a,b) (b ? a * 100 / b : 0)
1296
1297 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1298                                    struct seq_file *seq, int which)
1299 {
1300         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1301         unsigned long start, end, r, w;
1302         char *unitp = "KMGTPEZY";
1303         int i, units = 10;
1304         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1305
1306         read_cum = 0;
1307         write_cum = 0;
1308         start = 0;
1309
1310         for(i = 0; i < LL_HIST_MAX; i++) {
1311                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1312                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1313         }
1314
1315         for(i = 0; i < LL_HIST_MAX; i++) {
1316                 r = pp_info->pp_r_hist.oh_buckets[i];
1317                 w = pp_info->pp_w_hist.oh_buckets[i];
1318                 read_cum += r;
1319                 write_cum += w;
1320                 end = 1 << (i + LL_HIST_START - units);
1321                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1322                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1323                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1324                            r, pct(r, read_tot), pct(read_cum, read_tot),
1325                            w, pct(w, write_tot), pct(write_cum, write_tot));
1326                 start = end;
1327                 if (start == 1<<10) {
1328                         start = 1;
1329                         units += 10;
1330                         unitp++;
1331                 }
1332                 if (read_cum == read_tot && write_cum == write_tot)
1333                         break;
1334         }
1335 }
1336
1337 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1338 {
1339         struct timeval now;
1340         struct ll_sb_info *sbi = seq->private;
1341         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1342         int k;
1343
1344         do_gettimeofday(&now);
1345
1346         if (!sbi->ll_rw_stats_on) {
1347                 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \[D/d]isabled\" to deactivate\n");
1348                 return 0;
1349         }
1350         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1351                    now.tv_sec, now.tv_usec);
1352         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1353         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1354                    "extents", "calls", "%", "cum%",
1355                    "calls", "%", "cum%");
1356         spin_lock(&sbi->ll_pp_extent_lock);
1357         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1358                 if (io_extents->pp_extents[k].pid != 0) {
1359                         seq_printf(seq, "\nPID: %d\n",
1360                                    io_extents->pp_extents[k].pid);
1361                         ll_display_extents_info(io_extents, seq, k);
1362                 }
1363         }
1364         spin_unlock(&sbi->ll_pp_extent_lock);
1365         return 0;
1366 }
1367
1368 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1369                                                 const char __user *buf,
1370                                                 size_t len,
1371                                                 loff_t *off)
1372 {
1373         struct seq_file *seq = file->private_data;
1374         struct ll_sb_info *sbi = seq->private;
1375         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1376         int i;
1377         int value = 1, rc = 0;
1378
1379         if (len == 0)
1380                 return -EINVAL;
1381
1382         rc = lprocfs_write_helper(buf, len, &value);
1383         if (rc < 0 && len < 16) {
1384                 char kernbuf[16];
1385
1386                 if (copy_from_user(kernbuf, buf, len))
1387                         return -EFAULT;
1388                 kernbuf[len] = 0;
1389
1390                 if (kernbuf[len - 1] == '\n')
1391                         kernbuf[len - 1] = 0;
1392
1393                 if (strcmp(kernbuf, "disabled") == 0 ||
1394                     strcmp(kernbuf, "Disabled") == 0)
1395                         value = 0;
1396         }
1397
1398         if (value == 0)
1399                 sbi->ll_rw_stats_on = 0;
1400         else
1401                 sbi->ll_rw_stats_on = 1;
1402
1403         spin_lock(&sbi->ll_pp_extent_lock);
1404         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1405                 io_extents->pp_extents[i].pid = 0;
1406                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1407                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1408         }
1409         spin_unlock(&sbi->ll_pp_extent_lock);
1410         return len;
1411 }
1412
1413 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1414
1415 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1416 {
1417         struct timeval now;
1418         struct ll_sb_info *sbi = seq->private;
1419         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1420
1421         do_gettimeofday(&now);
1422
1423         if (!sbi->ll_rw_stats_on) {
1424                 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1425                 return 0;
1426         }
1427         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1428                    now.tv_sec, now.tv_usec);
1429
1430         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1431         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1432                    "extents", "calls", "%", "cum%",
1433                    "calls", "%", "cum%");
1434         spin_lock(&sbi->ll_lock);
1435         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1436         spin_unlock(&sbi->ll_lock);
1437
1438         return 0;
1439 }
1440
1441 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1442                                              const char __user *buf,
1443                                              size_t len, loff_t *off)
1444 {
1445         struct seq_file *seq = file->private_data;
1446         struct ll_sb_info *sbi = seq->private;
1447         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1448         int i;
1449         int value = 1, rc = 0;
1450
1451         if (len == 0)
1452                 return -EINVAL;
1453
1454         rc = lprocfs_write_helper(buf, len, &value);
1455         if (rc < 0 && len < 16) {
1456                 char kernbuf[16];
1457
1458                 if (copy_from_user(kernbuf, buf, len))
1459                         return -EFAULT;
1460                 kernbuf[len] = 0;
1461
1462                 if (kernbuf[len - 1] == '\n')
1463                         kernbuf[len - 1] = 0;
1464
1465                 if (strcmp(kernbuf, "disabled") == 0 ||
1466                     strcmp(kernbuf, "Disabled") == 0)
1467                         value = 0;
1468         }
1469
1470         if (value == 0)
1471                 sbi->ll_rw_stats_on = 0;
1472         else
1473                 sbi->ll_rw_stats_on = 1;
1474
1475         spin_lock(&sbi->ll_pp_extent_lock);
1476         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1477                 io_extents->pp_extents[i].pid = 0;
1478                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1479                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1480         }
1481         spin_unlock(&sbi->ll_pp_extent_lock);
1482
1483         return len;
1484 }
1485 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1486
1487 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1488                        struct ll_file_data *file, loff_t pos,
1489                        size_t count, int rw)
1490 {
1491         int i, cur = -1;
1492         struct ll_rw_process_info *process;
1493         struct ll_rw_process_info *offset;
1494         int *off_count = &sbi->ll_rw_offset_entry_count;
1495         int *process_count = &sbi->ll_offset_process_count;
1496         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1497
1498         if(!sbi->ll_rw_stats_on)
1499                 return;
1500         process = sbi->ll_rw_process_info;
1501         offset = sbi->ll_rw_offset_info;
1502
1503         spin_lock(&sbi->ll_pp_extent_lock);
1504         /* Extent statistics */
1505         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1506                 if(io_extents->pp_extents[i].pid == pid) {
1507                         cur = i;
1508                         break;
1509                 }
1510         }
1511
1512         if (cur == -1) {
1513                 /* new process */
1514                 sbi->ll_extent_process_count =
1515                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1516                 cur = sbi->ll_extent_process_count;
1517                 io_extents->pp_extents[cur].pid = pid;
1518                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1519                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1520         }
1521
1522         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1523              (i < (LL_HIST_MAX - 1)); i++);
1524         if (rw == 0) {
1525                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1526                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1527         } else {
1528                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1529                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1530         }
1531         spin_unlock(&sbi->ll_pp_extent_lock);
1532
1533         spin_lock(&sbi->ll_process_lock);
1534         /* Offset statistics */
1535         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1536                 if (process[i].rw_pid == pid) {
1537                         if (process[i].rw_last_file != file) {
1538                                 process[i].rw_range_start = pos;
1539                                 process[i].rw_last_file_pos = pos + count;
1540                                 process[i].rw_smallest_extent = count;
1541                                 process[i].rw_largest_extent = count;
1542                                 process[i].rw_offset = 0;
1543                                 process[i].rw_last_file = file;
1544                                 spin_unlock(&sbi->ll_process_lock);
1545                                 return;
1546                         }
1547                         if (process[i].rw_last_file_pos != pos) {
1548                                 *off_count =
1549                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1550                                 offset[*off_count].rw_op = process[i].rw_op;
1551                                 offset[*off_count].rw_pid = pid;
1552                                 offset[*off_count].rw_range_start =
1553                                         process[i].rw_range_start;
1554                                 offset[*off_count].rw_range_end =
1555                                         process[i].rw_last_file_pos;
1556                                 offset[*off_count].rw_smallest_extent =
1557                                         process[i].rw_smallest_extent;
1558                                 offset[*off_count].rw_largest_extent =
1559                                         process[i].rw_largest_extent;
1560                                 offset[*off_count].rw_offset =
1561                                         process[i].rw_offset;
1562                                 process[i].rw_op = rw;
1563                                 process[i].rw_range_start = pos;
1564                                 process[i].rw_smallest_extent = count;
1565                                 process[i].rw_largest_extent = count;
1566                                 process[i].rw_offset = pos -
1567                                         process[i].rw_last_file_pos;
1568                         }
1569                         if(process[i].rw_smallest_extent > count)
1570                                 process[i].rw_smallest_extent = count;
1571                         if(process[i].rw_largest_extent < count)
1572                                 process[i].rw_largest_extent = count;
1573                         process[i].rw_last_file_pos = pos + count;
1574                         spin_unlock(&sbi->ll_process_lock);
1575                         return;
1576                 }
1577         }
1578         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1579         process[*process_count].rw_pid = pid;
1580         process[*process_count].rw_op = rw;
1581         process[*process_count].rw_range_start = pos;
1582         process[*process_count].rw_last_file_pos = pos + count;
1583         process[*process_count].rw_smallest_extent = count;
1584         process[*process_count].rw_largest_extent = count;
1585         process[*process_count].rw_offset = 0;
1586         process[*process_count].rw_last_file = file;
1587         spin_unlock(&sbi->ll_process_lock);
1588 }
1589
1590 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1591 {
1592         struct timeval now;
1593         struct ll_sb_info *sbi = seq->private;
1594         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1595         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1596         int i;
1597
1598         do_gettimeofday(&now);
1599
1600         if (!sbi->ll_rw_stats_on) {
1601                 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1602                 return 0;
1603         }
1604         spin_lock(&sbi->ll_process_lock);
1605
1606         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1607                    now.tv_sec, now.tv_usec);
1608         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1609                    "R/W", "PID", "RANGE START", "RANGE END",
1610                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1611
1612         /* We stored the discontiguous offsets here; print them first */
1613         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1614                 if (offset[i].rw_pid != 0)
1615                         seq_printf(seq,
1616                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1617                                    offset[i].rw_op == READ ? 'R' : 'W',
1618                                    offset[i].rw_pid,
1619                                    offset[i].rw_range_start,
1620                                    offset[i].rw_range_end,
1621                                    (unsigned long)offset[i].rw_smallest_extent,
1622                                    (unsigned long)offset[i].rw_largest_extent,
1623                                    offset[i].rw_offset);
1624         }
1625
1626         /* Then print the current offsets for each process */
1627         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1628                 if (process[i].rw_pid != 0)
1629                         seq_printf(seq,
1630                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1631                                    process[i].rw_op == READ ? 'R' : 'W',
1632                                    process[i].rw_pid,
1633                                    process[i].rw_range_start,
1634                                    process[i].rw_last_file_pos,
1635                                    (unsigned long)process[i].rw_smallest_extent,
1636                                    (unsigned long)process[i].rw_largest_extent,
1637                                    process[i].rw_offset);
1638         }
1639         spin_unlock(&sbi->ll_process_lock);
1640
1641         return 0;
1642 }
1643
1644 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1645                                             const char __user *buf,
1646                                             size_t len, loff_t *off)
1647 {
1648         struct seq_file *seq = file->private_data;
1649         struct ll_sb_info *sbi = seq->private;
1650         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1651         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1652         int value = 1, rc = 0;
1653
1654         if (len == 0)
1655                 return -EINVAL;
1656
1657         rc = lprocfs_write_helper(buf, len, &value);
1658
1659         if (rc < 0 && len < 16) {
1660                 char kernbuf[16];
1661
1662                 if (copy_from_user(kernbuf, buf, len))
1663                         return -EFAULT;
1664                 kernbuf[len] = 0;
1665
1666                 if (kernbuf[len - 1] == '\n')
1667                         kernbuf[len - 1] = 0;
1668
1669                 if (strcmp(kernbuf, "disabled") == 0 ||
1670                     strcmp(kernbuf, "Disabled") == 0)
1671                         value = 0;
1672         }
1673
1674         if (value == 0)
1675                 sbi->ll_rw_stats_on = 0;
1676         else
1677                 sbi->ll_rw_stats_on = 1;
1678
1679         spin_lock(&sbi->ll_process_lock);
1680         sbi->ll_offset_process_count = 0;
1681         sbi->ll_rw_offset_entry_count = 0;
1682         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1683                LL_PROCESS_HIST_MAX);
1684         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1685                LL_OFFSET_HIST_MAX);
1686         spin_unlock(&sbi->ll_process_lock);
1687
1688         return len;
1689 }
1690
1691 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1692 #endif /* CONFIG_PROC_FS */