lustre/osd-ldiskfs/osd_lproc.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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd/osd_lproc.c
  37  *
  38  * Author: Mikhail Pershin <tappro@sun.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42
  43 #include <lprocfs_status.h>
  44 #include <lustre/lustre_idl.h>
  45
  46 #include "osd_internal.h"
  47
  48 #ifdef LPROCFS
  49
  50 void osd_brw_stats_update(struct osd_device *osd, struct osd_iobuf *iobuf)
  51 {
  52         struct brw_stats *s = &osd->od_brw_stats;
  53         unsigned long    *last_block = NULL;
  54         struct page     **pages = iobuf->dr_pages;
  55         struct page      *last_page = NULL;
  56         unsigned long     discont_pages = 0;
  57         unsigned long     discont_blocks = 0;
  58         unsigned long    *blocks = iobuf->dr_blocks;
  59         int               i, nr_pages = iobuf->dr_npages;
  60         int               blocks_per_page;
  61         int               rw = iobuf->dr_rw;
  62
  63         if (unlikely(nr_pages == 0))
  64                 return;
  65
  66         blocks_per_page = PAGE_CACHE_SIZE >> osd_sb(osd)->s_blocksize_bits;
  67
  68         lprocfs_oh_tally_log2(&s->hist[BRW_R_PAGES+rw], nr_pages);
  69
  70         while (nr_pages-- > 0) {
  71                 if (last_page && (*pages)->index != (last_page->index + 1))
  72                         discont_pages++;
  73                 last_page = *pages;
  74                 pages++;
  75                 for (i = 0; i < blocks_per_page; i++) {
  76                         if (last_block && *blocks != (*last_block + 1))
  77                                 discont_blocks++;
  78                         last_block = blocks++;
  79                 }
  80         }
  81
  82         lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_PAGES+rw], discont_pages);
  83         lprocfs_oh_tally(&s->hist[BRW_R_DISCONT_BLOCKS+rw], discont_blocks);
  84 }
  85
  86 #define pct(a, b) (b ? a * 100 / b : 0)
  87
  88 static void display_brw_stats(struct seq_file *seq, char *name, char *units,
  89         struct obd_histogram *read, struct obd_histogram *write, int scale)
  90 {
  91         unsigned long read_tot, write_tot, r, w, read_cum = 0, write_cum = 0;
  92         int i;
  93
  94         seq_printf(seq, "\n%26s read      |     write\n", " ");
  95         seq_printf(seq, "%-22s %-5s %% cum %% |  %-11s %% cum %%\n",
  96                    name, units, units);
  97
  98         read_tot = lprocfs_oh_sum(read);
  99         write_tot = lprocfs_oh_sum(write);
 100         for (i = 0; i < OBD_HIST_MAX; i++) {
 101                 r = read->oh_buckets[i];
 102                 w = write->oh_buckets[i];
 103                 read_cum += r;
 104                 write_cum += w;
 105                 if (read_cum == 0 && write_cum == 0)
 106                         continue;
 107
 108                 if (!scale)
 109                         seq_printf(seq, "%u", i);
 110                 else if (i < 10)
 111                         seq_printf(seq, "%u", scale << i);
 112                 else if (i < 20)
 113                         seq_printf(seq, "%uK", scale << (i-10));
 114                 else
 115                         seq_printf(seq, "%uM", scale << (i-20));
 116
 117                 seq_printf(seq, ":\t\t%10lu %3lu %3lu   | %4lu %3lu %3lu\n",
 118                            r, pct(r, read_tot), pct(read_cum, read_tot),
 119                            w, pct(w, write_tot), pct(write_cum, write_tot));
 120
 121                 if (read_cum == read_tot && write_cum == write_tot)
 122                         break;
 123         }
 124 }
 125
 126 static void brw_stats_show(struct seq_file *seq, struct brw_stats *brw_stats)
 127 {
 128         struct timeval now;
 129
 130         /* this sampling races with updates */
 131         do_gettimeofday(&now);
 132         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 133                    now.tv_sec, now.tv_usec);
 134
 135         display_brw_stats(seq, "pages per bulk r/w", "rpcs",
 136                           &brw_stats->hist[BRW_R_PAGES],
 137                           &brw_stats->hist[BRW_W_PAGES], 1);
 138
 139         display_brw_stats(seq, "discontiguous pages", "rpcs",
 140                           &brw_stats->hist[BRW_R_DISCONT_PAGES],
 141                           &brw_stats->hist[BRW_W_DISCONT_PAGES], 0);
 142
 143         display_brw_stats(seq, "discontiguous blocks", "rpcs",
 144                           &brw_stats->hist[BRW_R_DISCONT_BLOCKS],
 145                           &brw_stats->hist[BRW_W_DISCONT_BLOCKS], 0);
 146
 147         display_brw_stats(seq, "disk fragmented I/Os", "ios",
 148                           &brw_stats->hist[BRW_R_DIO_FRAGS],
 149                           &brw_stats->hist[BRW_W_DIO_FRAGS], 0);
 150
 151         display_brw_stats(seq, "disk I/Os in flight", "ios",
 152                           &brw_stats->hist[BRW_R_RPC_HIST],
 153                           &brw_stats->hist[BRW_W_RPC_HIST], 0);
 154
 155         display_brw_stats(seq, "I/O time (1/1000s)", "ios",
 156                           &brw_stats->hist[BRW_R_IO_TIME],
 157                           &brw_stats->hist[BRW_W_IO_TIME], 1000 / HZ);
 158
 159         display_brw_stats(seq, "disk I/O size", "ios",
 160                           &brw_stats->hist[BRW_R_DISK_IOSIZE],
 161                           &brw_stats->hist[BRW_W_DISK_IOSIZE], 1);
 162 }
 163
 164 #undef pct
 165
 166 static int osd_brw_stats_seq_show(struct seq_file *seq, void *v)
 167 {
 168         struct osd_device *osd = seq->private;
 169
 170         brw_stats_show(seq, &osd->od_brw_stats);
 171
 172         return 0;
 173 }
 174
 175 static ssize_t osd_brw_stats_seq_write(struct file *file, const char *buf,
 176                                        size_t len, loff_t *off)
 177 {
 178         struct seq_file *seq = file->private_data;
 179         struct osd_device *osd = seq->private;
 180         int i;
 181
 182         for (i = 0; i < BRW_LAST; i++)
 183                 lprocfs_oh_clear(&osd->od_brw_stats.hist[i]);
 184
 185         return len;
 186 }
 187
 188 LPROC_SEQ_FOPS(osd_brw_stats);
 189
 190 static int osd_stats_init(struct osd_device *osd)
 191 {
 192         int i, result;
 193         ENTRY;
 194
 195         for (i = 0; i < BRW_LAST; i++)
 196                 spin_lock_init(&osd->od_brw_stats.hist[i].oh_lock);
 197
 198         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
 199         if (osd->od_stats != NULL) {
 200                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
 201                                                 osd->od_stats);
 202                 if (result)
 203                         GOTO(out, result);
 204
 205                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
 206                                      LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
 207                                      "get_page", "usec");
 208                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
 209                                      LPROCFS_CNTR_AVGMINMAX,
 210                                      "get_page_failures", "num");
 211                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
 212                                      LPROCFS_CNTR_AVGMINMAX,
 213                                      "cache_access", "pages");
 214                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
 215                                      LPROCFS_CNTR_AVGMINMAX,
 216                                      "cache_hit", "pages");
 217                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
 218                                      LPROCFS_CNTR_AVGMINMAX,
 219                                      "cache_miss", "pages");
 220 #if OSD_THANDLE_STATS
 221                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
 222                                      LPROCFS_CNTR_AVGMINMAX,
 223                                      "thandle starting", "usec");
 224                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
 225                                      LPROCFS_CNTR_AVGMINMAX,
 226                                      "thandle open", "usec");
 227                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
 228                                      LPROCFS_CNTR_AVGMINMAX,
 229                                      "thandle closing", "usec");
 230 #endif
 231                 result = lprocfs_seq_create(osd->od_proc_entry, "brw_stats",
 232                                             0644, &osd_brw_stats_fops, osd);
 233         } else
 234                 result = -ENOMEM;
 235
 236 out:
 237         RETURN(result);
 238 }
 239
 240 int osd_procfs_init(struct osd_device *osd, const char *name)
 241 {
 242         struct lprocfs_static_vars lvars;
 243         struct obd_type     *type;
 244         int                  rc;
 245         ENTRY;
 246
 247         /* at the moment there is no linkage between lu_type
 248          * and obd_type, so we lookup obd_type this way */
 249         type = class_search_type(LUSTRE_OSD_LDISKFS_NAME);
 250
 251         LASSERT(name != NULL);
 252         LASSERT(type != NULL);
 253
 254         /* Find the type procroot and add the proc entry for this device */
 255         lprocfs_osd_init_vars(&lvars);
 256         osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
 257                                               lvars.obd_vars, &osd->od_dt_dev);
 258         if (IS_ERR(osd->od_proc_entry)) {
 259                 rc = PTR_ERR(osd->od_proc_entry);
 260                 CERROR("Error %d setting up lprocfs for %s\n",
 261                        rc, name);
 262                 osd->od_proc_entry = NULL;
 263                 GOTO(out, rc);
 264         }
 265
 266         rc = osd_stats_init(osd);
 267
 268         EXIT;
 269 out:
 270         if (rc)
 271                osd_procfs_fini(osd);
 272         return rc;
 273 }
 274
 275 int osd_procfs_fini(struct osd_device *osd)
 276 {
 277         if (osd->od_stats)
 278                 lprocfs_free_stats(&osd->od_stats);
 279
 280         if (osd->od_proc_entry) {
 281                  lprocfs_remove(&osd->od_proc_entry);
 282                  osd->od_proc_entry = NULL;
 283         }
 284         RETURN(0);
 285 }
 286
 287 static int lprocfs_osd_rd_fstype(char *page, char **start, off_t off, int count,
 288                                  int *eof, void *data)
 289 {
 290         struct osd_device *osd = osd_dt_dev(data);
 291
 292         LASSERT(osd != NULL);
 293         return snprintf(page, count, "ldiskfs\n");
 294 }
 295
 296 static int lprocfs_osd_rd_mntdev(char *page, char **start, off_t off, int count,
 297                                  int *eof, void *data)
 298 {
 299         struct osd_device *osd = osd_dt_dev(data);
 300
 301         LASSERT(osd != NULL);
 302         if (unlikely(osd->od_mnt == NULL))
 303                 return -EINPROGRESS;
 304
 305         *eof = 1;
 306
 307         return snprintf(page, count, "%s\n", osd->od_mntdev);
 308 }
 309
 310 static int lprocfs_osd_rd_cache(char *page, char **start, off_t off,
 311                                 int count, int *eof, void *data)
 312 {
 313         struct osd_device *osd = osd_dt_dev(data);
 314
 315         LASSERT(osd != NULL);
 316         if (unlikely(osd->od_mnt == NULL))
 317                 return -EINPROGRESS;
 318
 319         return snprintf(page, count, "%u\n", osd->od_read_cache);
 320 }
 321
 322 static int lprocfs_osd_wr_cache(struct file *file, const char *buffer,
 323                                 unsigned long count, void *data)
 324 {
 325         struct osd_device       *osd = osd_dt_dev(data);
 326         int                      val, rc;
 327
 328         LASSERT(osd != NULL);
 329         if (unlikely(osd->od_mnt == NULL))
 330                 return -EINPROGRESS;
 331
 332         rc = lprocfs_write_helper(buffer, count, &val);
 333         if (rc)
 334                 return rc;
 335
 336         osd->od_read_cache = !!val;
 337         return count;
 338 }
 339
 340 static int lprocfs_osd_rd_wcache(char *page, char **start, off_t off,
 341                                  int count, int *eof, void *data)
 342 {
 343         struct osd_device *osd = osd_dt_dev(data);
 344
 345         LASSERT(osd != NULL);
 346         if (unlikely(osd->od_mnt == NULL))
 347                 return -EINPROGRESS;
 348
 349         return snprintf(page, count, "%u\n", osd->od_writethrough_cache);
 350 }
 351
 352 static int lprocfs_osd_wr_wcache(struct file *file, const char *buffer,
 353                                  unsigned long count, void *data)
 354 {
 355         struct osd_device       *osd = osd_dt_dev(data);
 356         int                      val, rc;
 357
 358         LASSERT(osd != NULL);
 359         if (unlikely(osd->od_mnt == NULL))
 360                 return -EINPROGRESS;
 361
 362         rc = lprocfs_write_helper(buffer, count, &val);
 363         if (rc)
 364                 return rc;
 365
 366         osd->od_writethrough_cache = !!val;
 367         return count;
 368 }
 369
 370 static int lprocfs_osd_wr_force_sync(struct file *file, const char *buffer,
 371                                      unsigned long count, void *data)
 372 {
 373         struct osd_device       *osd = osd_dt_dev(data);
 374         struct dt_device        *dt = data;
 375         struct lu_env            env;
 376         int                      rc;
 377
 378         LASSERT(osd != NULL);
 379         if (unlikely(osd->od_mnt == NULL))
 380                 return -EINPROGRESS;
 381
 382         rc = lu_env_init(&env, LCT_LOCAL);
 383         if (rc)
 384                 return rc;
 385         rc = dt_sync(&env, dt);
 386         lu_env_fini(&env);
 387
 388         return rc == 0 ? count : rc;
 389 }
 390
 391 static int lprocfs_osd_rd_pdo(char *page, char **start, off_t off, int count,
 392                               int *eof, void *data)
 393 {
 394         *eof = 1;
 395
 396         return snprintf(page, count, "%s\n", ldiskfs_pdo ? "ON" : "OFF");
 397 }
 398
 399 static int lprocfs_osd_wr_pdo(struct file *file, const char *buffer,
 400                               unsigned long count, void *data)
 401 {
 402         int     pdo;
 403         int     rc;
 404
 405         rc = lprocfs_write_helper(buffer, count, &pdo);
 406         if (rc != 0)
 407                 return rc;
 408
 409         ldiskfs_pdo = !!pdo;
 410
 411         return count;
 412 }
 413
 414 static int lprocfs_osd_rd_auto_scrub(char *page, char **start, off_t off,
 415                                      int count, int *eof, void *data)
 416 {
 417         struct osd_device *dev = osd_dt_dev(data);
 418
 419         LASSERT(dev != NULL);
 420         if (unlikely(dev->od_mnt == NULL))
 421                 return -EINPROGRESS;
 422
 423         *eof = 1;
 424         return snprintf(page, count, "%d\n", !dev->od_noscrub);
 425 }
 426
 427 static int lprocfs_osd_wr_auto_scrub(struct file *file, const char *buffer,
 428                                      unsigned long count, void *data)
 429 {
 430         struct osd_device *dev = osd_dt_dev(data);
 431         int val, rc;
 432
 433         LASSERT(dev != NULL);
 434         if (unlikely(dev->od_mnt == NULL))
 435                 return -EINPROGRESS;
 436
 437         rc = lprocfs_write_helper(buffer, count, &val);
 438         if (rc)
 439                 return rc;
 440
 441         dev->od_noscrub = !val;
 442         return count;
 443 }
 444
 445 static int lprocfs_osd_rd_track_declares_assert(char *page, char **start,
 446                                                 off_t off, int count,
 447                                                 int *eof, void *data)
 448 {
 449         *eof = 1;
 450
 451         return snprintf(page, count, "%d\n", ldiskfs_track_declares_assert);
 452 }
 453
 454 static int lprocfs_osd_wr_track_declares_assert(struct file *file,
 455                                                 const char *buffer,
 456                                                 unsigned long count, void *data)
 457 {
 458         int     track_declares_assert;
 459         int     rc;
 460
 461         rc = lprocfs_write_helper(buffer, count, &track_declares_assert);
 462         if (rc != 0)
 463                 return rc;
 464
 465         ldiskfs_track_declares_assert = !!track_declares_assert;
 466
 467         return count;
 468 }
 469
 470 static int lprocfs_osd_rd_oi_scrub(char *page, char **start, off_t off,
 471                                    int count, int *eof, void *data)
 472 {
 473         struct osd_device *dev = osd_dt_dev(data);
 474
 475         LASSERT(dev != NULL);
 476         if (unlikely(dev->od_mnt == NULL))
 477                 return -EINPROGRESS;
 478
 479         *eof = 1;
 480         return osd_scrub_dump(dev, page, count);
 481 }
 482
 483 int lprocfs_osd_rd_readcache(char *page, char **start, off_t off, int count,
 484                              int *eof, void *data)
 485 {
 486         struct osd_device       *osd = osd_dt_dev(data);
 487         int                      rc;
 488
 489         LASSERT(osd != NULL);
 490         if (unlikely(osd->od_mnt == NULL))
 491                 return -EINPROGRESS;
 492
 493         rc = snprintf(page, count, LPU64"\n", osd->od_readcache_max_filesize);
 494         return rc;
 495 }
 496
 497 int lprocfs_osd_wr_readcache(struct file *file, const char *buffer,
 498                              unsigned long count, void *data)
 499 {
 500         struct osd_device       *osd = osd_dt_dev(data);
 501         __u64                    val;
 502         int                      rc;
 503
 504         LASSERT(osd != NULL);
 505         if (unlikely(osd->od_mnt == NULL))
 506                 return -EINPROGRESS;
 507
 508         rc = lprocfs_write_u64_helper(buffer, count, &val);
 509         if (rc)
 510                 return rc;
 511
 512         osd->od_readcache_max_filesize = val > OSD_MAX_CACHE_SIZE ?
 513                                          OSD_MAX_CACHE_SIZE : val;
 514         return count;
 515 }
 516
 517 struct lprocfs_vars lprocfs_osd_obd_vars[] = {
 518         { "blocksize",          lprocfs_dt_rd_blksize,  0, 0 },
 519         { "kbytestotal",        lprocfs_dt_rd_kbytestotal,      0, 0 },
 520         { "kbytesfree",         lprocfs_dt_rd_kbytesfree,       0, 0 },
 521         { "kbytesavail",        lprocfs_dt_rd_kbytesavail,      0, 0 },
 522         { "filestotal",         lprocfs_dt_rd_filestotal,       0, 0 },
 523         { "filesfree",          lprocfs_dt_rd_filesfree,        0, 0 },
 524         { "fstype",          lprocfs_osd_rd_fstype,      0, 0 },
 525         { "mntdev",          lprocfs_osd_rd_mntdev,      0, 0 },
 526         { "force_sync",      0, lprocfs_osd_wr_force_sync     },
 527         { "pdo",             lprocfs_osd_rd_pdo, lprocfs_osd_wr_pdo, 0 },
 528         { "auto_scrub",      lprocfs_osd_rd_auto_scrub,
 529                              lprocfs_osd_wr_auto_scrub,  0 },
 530         { "oi_scrub",        lprocfs_osd_rd_oi_scrub,    0, 0 },
 531         { "force_sync",         0, lprocfs_osd_wr_force_sync },
 532         { "read_cache_enable",  lprocfs_osd_rd_cache, lprocfs_osd_wr_cache, 0 },
 533         { "writethrough_cache_enable",  lprocfs_osd_rd_wcache,
 534                                         lprocfs_osd_wr_wcache, 0 },
 535         { "readcache_max_filesize",     lprocfs_osd_rd_readcache,
 536                                         lprocfs_osd_wr_readcache, 0 },
 537         { 0 }
 538 };
 539
 540 struct lprocfs_vars lprocfs_osd_module_vars[] = {
 541         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 542         { "track_declares_assert",      lprocfs_osd_rd_track_declares_assert,
 543                                         lprocfs_osd_wr_track_declares_assert,
 544                                         0 },
 545         { 0 }
 546 };
 547
 548 void lprocfs_osd_init_vars(struct lprocfs_static_vars *lvars)
 549 {
 550         lvars->module_vars = lprocfs_osd_module_vars;
 551         lvars->obd_vars = lprocfs_osd_obd_vars;
 552 }
 553 #endif