lustre/osd-zfs/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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/osd-zfs/osd_lproc.c
  33  *
  34  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  35  * Author: Mike Pershin <tappro@whamcloud.com>
  36  */
  37
  38 #define DEBUG_SUBSYSTEM S_OSD
  39
  40 #include <obd.h>
  41 #include <obd_class.h>
  42 #include <lprocfs_status.h>
  43 #include <lustre_scrub.h>
  44
  45 #include "osd_internal.h"
  46
  47 #ifdef CONFIG_PROC_FS
  48
  49 static void display_brw_stats(struct seq_file *seq, char *name, char *units,
  50                               struct obd_histogram *read,
  51                               struct obd_histogram *write, int scale)
  52 {
  53         unsigned long read_tot, write_tot, r, w, read_cum = 0, write_cum = 0;
  54         int i;
  55
  56         seq_printf(seq, "\n%26s read      |     write\n", " ");
  57         seq_printf(seq, "%-22s %-5s %% cum %% |  %-11s %% cum %%\n",
  58                    name, units, units);
  59
  60         read_tot = lprocfs_oh_sum(read);
  61         write_tot = lprocfs_oh_sum(write);
  62         for (i = 0; i < OBD_HIST_MAX; i++) {
  63                 r = read->oh_buckets[i];
  64                 w = write->oh_buckets[i];
  65                 read_cum += r;
  66                 write_cum += w;
  67                 if (read_cum == 0 && write_cum == 0)
  68                         continue;
  69
  70                 if (!scale)
  71                         seq_printf(seq, "%u", i);
  72                 else if (i < 10)
  73                         seq_printf(seq, "%u", scale << i);
  74                 else if (i < 20)
  75                         seq_printf(seq, "%uK", scale << (i-10));
  76                 else
  77                         seq_printf(seq, "%uM", scale << (i-20));
  78
  79                 seq_printf(seq, ":\t\t%10lu %3u %3u   | %4lu %3u %3u\n",
  80                            r, pct(r, read_tot), pct(read_cum, read_tot),
  81                            w, pct(w, write_tot), pct(write_cum, write_tot));
  82
  83                 if (read_cum == read_tot && write_cum == write_tot)
  84                         break;
  85         }
  86 }
  87
  88 static void brw_stats_show(struct seq_file *seq, struct brw_stats *brw_stats)
  89 {
  90         struct timespec64 now;
  91
  92         /* this sampling races with updates */
  93         ktime_get_real_ts64(&now);
  94         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
  95                    (s64)now.tv_sec, now.tv_nsec);
  96
  97         display_brw_stats(seq, "pages per bulk r/w", "rpcs",
  98                           &brw_stats->hist[BRW_R_PAGES],
  99                           &brw_stats->hist[BRW_W_PAGES], 1);
 100         display_brw_stats(seq, "discontiguous pages", "rpcs",
 101                           &brw_stats->hist[BRW_R_DISCONT_PAGES],
 102                           &brw_stats->hist[BRW_W_DISCONT_PAGES], 0);
 103 #if 0
 104         display_brw_stats(seq, "discontiguous blocks", "rpcs",
 105                           &brw_stats->hist[BRW_R_DISCONT_BLOCKS],
 106                           &brw_stats->hist[BRW_W_DISCONT_BLOCKS], 0);
 107
 108         display_brw_stats(seq, "disk fragmented I/Os", "ios",
 109                           &brw_stats->hist[BRW_R_DIO_FRAGS],
 110                           &brw_stats->hist[BRW_W_DIO_FRAGS], 0);
 111 #endif
 112         display_brw_stats(seq, "disk I/Os in flight", "ios",
 113                           &brw_stats->hist[BRW_R_RPC_HIST],
 114                           &brw_stats->hist[BRW_W_RPC_HIST], 0);
 115
 116         display_brw_stats(seq, "I/O time (1/1000s)", "ios",
 117                           &brw_stats->hist[BRW_R_IO_TIME],
 118                           &brw_stats->hist[BRW_W_IO_TIME], 1000 / HZ);
 119
 120         display_brw_stats(seq, "disk I/O size", "ios",
 121                           &brw_stats->hist[BRW_R_DISK_IOSIZE],
 122                           &brw_stats->hist[BRW_W_DISK_IOSIZE], 1);
 123 }
 124
 125 static int osd_brw_stats_seq_show(struct seq_file *seq, void *v)
 126 {
 127         struct osd_device *osd = seq->private;
 128
 129         brw_stats_show(seq, &osd->od_brw_stats);
 130
 131         return 0;
 132 }
 133
 134 static ssize_t osd_brw_stats_seq_write(struct file *file,
 135                                        const char __user *buf,
 136                                        size_t len, loff_t *off)
 137 {
 138         struct seq_file *seq = file->private_data;
 139         struct osd_device *osd = seq->private;
 140         int i;
 141
 142         for (i = 0; i < BRW_LAST; i++)
 143                 lprocfs_oh_clear(&osd->od_brw_stats.hist[i]);
 144
 145         return len;
 146 }
 147
 148 LPROC_SEQ_FOPS(osd_brw_stats);
 149
 150 static int osd_stats_init(struct osd_device *osd)
 151 {
 152         int result, i;
 153         ENTRY;
 154
 155         for (i = 0; i < BRW_LAST; i++)
 156                 spin_lock_init(&osd->od_brw_stats.hist[i].oh_lock);
 157
 158         osd->od_stats = lprocfs_alloc_stats(LPROC_OSD_LAST, 0);
 159         if (osd->od_stats != NULL) {
 160                 result = lprocfs_register_stats(osd->od_proc_entry, "stats",
 161                                 osd->od_stats);
 162                 if (result)
 163                         GOTO(out, result);
 164
 165                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_GET_PAGE,
 166                                 LPROCFS_CNTR_AVGMINMAX|LPROCFS_CNTR_STDDEV,
 167                                 "get_page", "usec");
 168                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_NO_PAGE,
 169                                 LPROCFS_CNTR_AVGMINMAX,
 170                                 "get_page_failures", "num");
 171                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_ACCESS,
 172                                 LPROCFS_CNTR_AVGMINMAX,
 173                                 "cache_access", "pages");
 174                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_HIT,
 175                                 LPROCFS_CNTR_AVGMINMAX,
 176                                 "cache_hit", "pages");
 177                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_CACHE_MISS,
 178                                 LPROCFS_CNTR_AVGMINMAX,
 179                                 "cache_miss", "pages");
 180                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_COPY_IO,
 181                                 LPROCFS_CNTR_AVGMINMAX,
 182                                 "copy", "pages");
 183                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_ZEROCOPY_IO,
 184                                 LPROCFS_CNTR_AVGMINMAX,
 185                                 "zerocopy", "pages");
 186                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_TAIL_IO,
 187                                 LPROCFS_CNTR_AVGMINMAX,
 188                                 "tail", "pages");
 189 #ifdef OSD_THANDLE_STATS
 190                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_STARTING,
 191                                 LPROCFS_CNTR_AVGMINMAX,
 192                                 "thandle_starting", "usec");
 193                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_OPEN,
 194                                 LPROCFS_CNTR_AVGMINMAX,
 195                                 "thandle_open", "usec");
 196                 lprocfs_counter_init(osd->od_stats, LPROC_OSD_THANDLE_CLOSING,
 197                                 LPROCFS_CNTR_AVGMINMAX,
 198                                 "thandle_closing", "usec");
 199 #endif
 200                 result = lprocfs_seq_create(osd->od_proc_entry, "brw_stats",
 201                                             0644, &osd_brw_stats_fops, osd);
 202         } else {
 203                 result = -ENOMEM;
 204         }
 205
 206 out:
 207         RETURN(result);
 208 }
 209
 210 static int zfs_osd_auto_scrub_seq_show(struct seq_file *m, void *data)
 211 {
 212         struct osd_device *dev = osd_dt_dev((struct dt_device *)m->private);
 213
 214         LASSERT(dev != NULL);
 215         if (!dev->od_os)
 216                 return -EINPROGRESS;
 217
 218         seq_printf(m, "%lld\n", dev->od_auto_scrub_interval);
 219         return 0;
 220 }
 221
 222 static ssize_t
 223 zfs_osd_auto_scrub_seq_write(struct file *file, const char __user *buffer,
 224                              size_t count, loff_t *off)
 225 {
 226         struct seq_file *m = file->private_data;
 227         struct dt_device *dt = m->private;
 228         struct osd_device *dev = osd_dt_dev(dt);
 229         int rc;
 230         __s64 val;
 231
 232         LASSERT(dev != NULL);
 233         if (!dev->od_os)
 234                 return -EINPROGRESS;
 235
 236         rc = kstrtoull_from_user(buffer, count, 0, &val);
 237         if (rc)
 238                 return rc;
 239
 240         dev->od_auto_scrub_interval = val;
 241         return count;
 242 }
 243 LPROC_SEQ_FOPS(zfs_osd_auto_scrub);
 244
 245 static int zfs_osd_oi_scrub_seq_show(struct seq_file *m, void *data)
 246 {
 247         struct osd_device *dev = osd_dt_dev((struct dt_device *)m->private);
 248
 249         LASSERT(dev != NULL);
 250         if (!dev->od_os)
 251                 return -EINPROGRESS;
 252
 253         scrub_dump(m, &dev->od_scrub);
 254         return 0;
 255 }
 256 LPROC_SEQ_FOPS_RO(zfs_osd_oi_scrub);
 257
 258 static int zfs_osd_fstype_seq_show(struct seq_file *m, void *data)
 259 {
 260         seq_puts(m, "zfs\n");
 261         return 0;
 262 }
 263 LPROC_SEQ_FOPS_RO(zfs_osd_fstype);
 264
 265 static int zfs_osd_mntdev_seq_show(struct seq_file *m, void *data)
 266 {
 267         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 268
 269         LASSERT(osd != NULL);
 270         seq_printf(m, "%s\n", osd->od_mntdev);
 271         return 0;
 272 }
 273 LPROC_SEQ_FOPS_RO(zfs_osd_mntdev);
 274
 275 static ssize_t
 276 lprocfs_osd_force_sync_seq_write(struct file *file, const char __user *buffer,
 277                                 size_t count, loff_t *off)
 278 {
 279         struct seq_file   *m = file->private_data;
 280         struct dt_device  *dt = m->private;
 281         struct lu_env      env;
 282         int rc;
 283
 284         rc = lu_env_init(&env, LCT_LOCAL);
 285         if (rc)
 286                 return rc;
 287         rc = dt_sync(&env, dt);
 288         lu_env_fini(&env);
 289
 290         return rc == 0 ? count : rc;
 291 }
 292 LPROC_SEQ_FOPS_WR_ONLY(zfs, osd_force_sync);
 293
 294 static int zfs_osd_index_backup_seq_show(struct seq_file *m, void *data)
 295 {
 296         struct osd_device *dev = osd_dt_dev((struct dt_device *)m->private);
 297
 298         LASSERT(dev != NULL);
 299         if (!dev->od_os)
 300                 return -EINPROGRESS;
 301
 302         seq_printf(m, "%d\n", dev->od_index_backup_policy);
 303         return 0;
 304 }
 305
 306 static ssize_t zfs_osd_index_backup_seq_write(struct file *file,
 307                                               const char __user *buffer,
 308                                               size_t count, loff_t *off)
 309 {
 310         struct seq_file *m = file->private_data;
 311         struct dt_device *dt = m->private;
 312         struct osd_device *dev = osd_dt_dev(dt);
 313         int val;
 314         int rc;
 315
 316         LASSERT(dev != NULL);
 317         if (!dev->od_os)
 318                 return -EINPROGRESS;
 319
 320         rc = kstrtoint_from_user(buffer, count, 0, &val);
 321         if (rc)
 322                 return rc;
 323
 324         dev->od_index_backup_policy = val;
 325         return count;
 326 }
 327 LPROC_SEQ_FOPS(zfs_osd_index_backup);
 328
 329 static int zfs_osd_readcache_seq_show(struct seq_file *m, void *data)
 330 {
 331         struct osd_device *osd = osd_dt_dev((struct dt_device *)m->private);
 332
 333         LASSERT(osd != NULL);
 334         if (unlikely(osd->od_os == NULL))
 335                 return -EINPROGRESS;
 336
 337         seq_printf(m, "%llu\n", osd->od_readcache_max_filesize);
 338         return 0;
 339 }
 340
 341 static ssize_t
 342 zfs_osd_readcache_seq_write(struct file *file, const char __user *buffer,
 343                             size_t count, loff_t *off)
 344 {
 345         struct seq_file *m = file->private_data;
 346         struct dt_device *dt = m->private;
 347         struct osd_device *osd = osd_dt_dev(dt);
 348         s64 val;
 349         int rc;
 350
 351         LASSERT(osd != NULL);
 352         if (unlikely(osd->od_os == NULL))
 353                 return -EINPROGRESS;
 354
 355         rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
 356         if (rc)
 357                 return rc;
 358         if (val < 0)
 359                 return -ERANGE;
 360
 361         osd->od_readcache_max_filesize = val > OSD_MAX_CACHE_SIZE ?
 362                                          OSD_MAX_CACHE_SIZE : val;
 363         return count;
 364 }
 365 LPROC_SEQ_FOPS(zfs_osd_readcache);
 366
 367 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_blksize);
 368 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytestotal);
 369 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesfree);
 370 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_kbytesavail);
 371 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filestotal);
 372 LPROC_SEQ_FOPS_RO_TYPE(zfs, dt_filesfree);
 373
 374 struct lprocfs_vars lprocfs_osd_obd_vars[] = {
 375         { .name =       "blocksize",
 376           .fops =       &zfs_dt_blksize_fops            },
 377         { .name =       "kbytestotal",
 378           .fops =       &zfs_dt_kbytestotal_fops        },
 379         { .name =       "kbytesfree",
 380           .fops =       &zfs_dt_kbytesfree_fops         },
 381         { .name =       "kbytesavail",
 382           .fops =       &zfs_dt_kbytesavail_fops        },
 383         { .name =       "filestotal",
 384           .fops =       &zfs_dt_filestotal_fops         },
 385         { .name =       "filesfree",
 386           .fops =       &zfs_dt_filesfree_fops          },
 387         { .name =       "auto_scrub",
 388           .fops =       &zfs_osd_auto_scrub_fops        },
 389         { .name =       "oi_scrub",
 390           .fops =       &zfs_osd_oi_scrub_fops          },
 391         { .name =       "fstype",
 392           .fops =       &zfs_osd_fstype_fops            },
 393         { .name =       "mntdev",
 394           .fops =       &zfs_osd_mntdev_fops            },
 395         { .name =       "force_sync",
 396           .fops =       &zfs_osd_force_sync_fops        },
 397         { .name =       "index_backup",
 398           .fops =       &zfs_osd_index_backup_fops      },
 399         { .name =       "readcache_max_filesize",
 400           .fops =       &zfs_osd_readcache_fops },
 401         { 0 }
 402 };
 403
 404 int osd_procfs_init(struct osd_device *osd, const char *name)
 405 {
 406         struct obd_type *type;
 407         int              rc;
 408         ENTRY;
 409
 410         if (osd->od_proc_entry)
 411                 RETURN(0);
 412
 413         /* at the moment there is no linkage between lu_type
 414          * and obd_type, so we lookup obd_type this way */
 415         type = class_search_type(LUSTRE_OSD_ZFS_NAME);
 416
 417         LASSERT(name != NULL);
 418         LASSERT(type != NULL);
 419
 420         osd->od_proc_entry = lprocfs_register(name, type->typ_procroot,
 421                                               lprocfs_osd_obd_vars,
 422                                               &osd->od_dt_dev);
 423         if (IS_ERR(osd->od_proc_entry)) {
 424                 rc = PTR_ERR(osd->od_proc_entry);
 425                 CERROR("Error %d setting up lprocfs for %s\n", rc, name);
 426                 osd->od_proc_entry = NULL;
 427                 GOTO(out, rc);
 428         }
 429
 430         rc = osd_stats_init(osd);
 431
 432         GOTO(out, rc);
 433 out:
 434         if (rc)
 435                 osd_procfs_fini(osd);
 436         return rc;
 437 }
 438
 439 int osd_procfs_fini(struct osd_device *osd)
 440 {
 441         ENTRY;
 442
 443         if (osd->od_stats)
 444                 lprocfs_free_stats(&osd->od_stats);
 445
 446         if (osd->od_proc_entry) {
 447                 lprocfs_remove(&osd->od_proc_entry);
 448                 osd->od_proc_entry = NULL;
 449         }
 450
 451         RETURN(0);
 452 }
 453
 454 #endif