lustre/mdc/lproc_mdc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 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 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <linux/vfs.h>
  35 #include <obd_class.h>
  36 #include <lprocfs_status.h>
  37 #include <lustre_osc.h>
  38 #include <cl_object.h>
  39 #include "mdc_internal.h"
  40
  41 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  42                            char *buf)
  43 {
  44         struct obd_device *dev = container_of(kobj, struct obd_device,
  45                                               obd_kset.kobj);
  46         ssize_t len;
  47
  48         LPROCFS_CLIMP_CHECK(dev);
  49         len = sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  50         LPROCFS_CLIMP_EXIT(dev);
  51         return len;
  52 }
  53
  54 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  55                             const char *buffer, size_t count)
  56 {
  57         struct obd_device *dev = container_of(kobj, struct obd_device,
  58                                               obd_kset.kobj);
  59         bool val;
  60         int rc;
  61
  62         rc = kstrtobool(buffer, &val);
  63         if (rc)
  64                 return rc;
  65
  66         /* opposite senses */
  67         if (dev->u.cli.cl_import->imp_deactive == val)
  68                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  69         else
  70                 CDEBUG(D_CONFIG, "activate %u: ignoring repeat request\n",
  71                        val);
  72
  73         return count;
  74 }
  75 LUSTRE_RW_ATTR(active);
  76
  77 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  78                                        struct attribute *attr,
  79                                        char *buf)
  80 {
  81         struct obd_device *dev = container_of(kobj, struct obd_device,
  82                                               obd_kset.kobj);
  83         ssize_t len;
  84         u32 max;
  85
  86         max = obd_get_max_rpcs_in_flight(&dev->u.cli);
  87         len = sprintf(buf, "%u\n", max);
  88
  89         return len;
  90 }
  91
  92 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  93                                         struct attribute *attr,
  94                                         const char *buffer,
  95                                         size_t count)
  96 {
  97         struct obd_device *dev = container_of(kobj, struct obd_device,
  98                                               obd_kset.kobj);
  99         unsigned int val;
 100         int rc;
 101
 102         rc = kstrtouint(buffer, 10, &val);
 103         if (rc)
 104                 return rc;
 105
 106         rc = obd_set_max_rpcs_in_flight(&dev->u.cli, val);
 107         if (rc)
 108                 count = rc;
 109
 110         return count;
 111 }
 112 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 113
 114 static ssize_t max_mod_rpcs_in_flight_show(struct kobject *kobj,
 115                                            struct attribute *attr,
 116                                            char *buf)
 117 {
 118         struct obd_device *dev = container_of(kobj, struct obd_device,
 119                                               obd_kset.kobj);
 120         u16 max;
 121
 122         max = obd_get_max_mod_rpcs_in_flight(&dev->u.cli);
 123         return sprintf(buf, "%hu\n", max);
 124 }
 125
 126 static ssize_t max_mod_rpcs_in_flight_store(struct kobject *kobj,
 127                                             struct attribute *attr,
 128                                             const char *buffer,
 129                                             size_t count)
 130 {
 131         struct obd_device *dev = container_of(kobj, struct obd_device,
 132                                               obd_kset.kobj);
 133         u16 val;
 134         int rc;
 135
 136         rc = kstrtou16(buffer, 10, &val);
 137         if (rc)
 138                 return rc;
 139
 140         rc = obd_set_max_mod_rpcs_in_flight(&dev->u.cli, val);
 141         if (rc)
 142                 count = rc;
 143
 144         return count;
 145 }
 146 LUSTRE_RW_ATTR(max_mod_rpcs_in_flight);
 147
 148 static int mdc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 149 {
 150         struct obd_device *dev = m->private;
 151         struct client_obd *cli = &dev->u.cli;
 152         long val;
 153         int mult;
 154
 155         spin_lock(&cli->cl_loi_list_lock);
 156         val = cli->cl_dirty_max_pages;
 157         spin_unlock(&cli->cl_loi_list_lock);
 158
 159         mult = 1 << (20 - PAGE_SHIFT);
 160         return lprocfs_seq_read_frac_helper(m, val, mult);
 161 }
 162
 163 static ssize_t mdc_max_dirty_mb_seq_write(struct file *file,
 164                                           const char __user *buffer,
 165                                           size_t count, loff_t *off)
 166 {
 167         struct seq_file *sfl = file->private_data;
 168         struct obd_device *dev = sfl->private;
 169         struct client_obd *cli = &dev->u.cli;
 170         s64 pages_number;
 171         int rc;
 172
 173         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 174         if (rc)
 175                 return rc;
 176
 177         pages_number >>= PAGE_SHIFT;
 178
 179         if (pages_number <= 0 ||
 180             pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 181             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 182                 return -ERANGE;
 183
 184         spin_lock(&cli->cl_loi_list_lock);
 185         cli->cl_dirty_max_pages = pages_number;
 186         osc_wake_cache_waiters(cli);
 187         spin_unlock(&cli->cl_loi_list_lock);
 188
 189         return count;
 190 }
 191 LPROC_SEQ_FOPS(mdc_max_dirty_mb);
 192
 193 static ssize_t contention_seconds_show(struct kobject *kobj,
 194                                        struct attribute *attr,
 195                                        char *buf)
 196 {
 197         struct obd_device *obd = container_of(kobj, struct obd_device,
 198                                               obd_kset.kobj);
 199         struct osc_device *od = obd2osc_dev(obd);
 200
 201         return sprintf(buf, "%lld\n", od->od_contention_time);
 202 }
 203
 204 static ssize_t contention_seconds_store(struct kobject *kobj,
 205                                         struct attribute *attr,
 206                                         const char *buffer,
 207                                         size_t count)
 208 {
 209         struct obd_device *obd = container_of(kobj, struct obd_device,
 210                                               obd_kset.kobj);
 211         struct osc_device *od = obd2osc_dev(obd);
 212         time64_t val;
 213         int rc;
 214
 215         rc = kstrtoll(buffer, 0, &val);
 216         if (rc)
 217                 return rc;
 218
 219         od->od_contention_time = val;
 220
 221         return count;
 222 }
 223 LUSTRE_RW_ATTR(contention_seconds);
 224
 225 LUSTRE_RO_ATTR(conn_uuid);
 226
 227 LUSTRE_WO_ATTR(ping);
 228
 229 static int mdc_cached_mb_seq_show(struct seq_file *m, void *v)
 230 {
 231         struct obd_device *dev = m->private;
 232         struct client_obd *cli = &dev->u.cli;
 233         int shift = 20 - PAGE_SHIFT;
 234
 235         seq_printf(m, "used_mb: %ld\n"
 236                    "busy_cnt: %ld\n"
 237                    "reclaim: %llu\n",
 238                    (atomic_long_read(&cli->cl_lru_in_list) +
 239                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 240                     atomic_long_read(&cli->cl_lru_busy),
 241                    cli->cl_lru_reclaim);
 242
 243         return 0;
 244 }
 245
 246 /* shrink the number of caching pages to a specific number */
 247 static ssize_t
 248 mdc_cached_mb_seq_write(struct file *file, const char __user *buffer,
 249                         size_t count, loff_t *off)
 250 {
 251         struct seq_file *sfl = file->private_data;
 252         struct obd_device *dev = sfl->private;
 253         struct client_obd *cli = &dev->u.cli;
 254         __s64 pages_number;
 255         long rc;
 256         char kernbuf[128];
 257
 258         if (count >= sizeof(kernbuf))
 259                 return -EINVAL;
 260
 261         if (copy_from_user(kernbuf, buffer, count))
 262                 return -EFAULT;
 263         kernbuf[count] = 0;
 264
 265         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 266                   kernbuf;
 267         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 268         if (rc)
 269                 return rc;
 270
 271         pages_number >>= PAGE_SHIFT;
 272
 273         if (pages_number < 0)
 274                 return -ERANGE;
 275
 276         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 277         if (rc > 0) {
 278                 struct lu_env *env;
 279                 __u16 refcheck;
 280
 281                 env = cl_env_get(&refcheck);
 282                 if (!IS_ERR(env)) {
 283                         (void)osc_lru_shrink(env, cli, rc, true);
 284                         cl_env_put(env, &refcheck);
 285                 }
 286         }
 287
 288         return count;
 289 }
 290 LPROC_SEQ_FOPS(mdc_cached_mb);
 291
 292 static int mdc_unstable_stats_seq_show(struct seq_file *m, void *v)
 293 {
 294         struct obd_device *dev = m->private;
 295         struct client_obd *cli = &dev->u.cli;
 296         long pages;
 297         int mb;
 298
 299         pages = atomic_long_read(&cli->cl_unstable_count);
 300         mb    = (pages * PAGE_SIZE) >> 20;
 301
 302         seq_printf(m, "unstable_pages: %20ld\n"
 303                    "unstable_mb:              %10d\n", pages, mb);
 304         return 0;
 305 }
 306 LPROC_SEQ_FOPS_RO(mdc_unstable_stats);
 307
 308 static ssize_t mdc_rpc_stats_seq_write(struct file *file,
 309                                        const char __user *buf,
 310                                        size_t len, loff_t *off)
 311 {
 312         struct seq_file *seq = file->private_data;
 313         struct obd_device *dev = seq->private;
 314         struct client_obd *cli = &dev->u.cli;
 315
 316         lprocfs_oh_clear(&cli->cl_mod_rpcs_hist);
 317
 318         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 319         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 320         lprocfs_oh_clear(&cli->cl_read_page_hist);
 321         lprocfs_oh_clear(&cli->cl_write_page_hist);
 322         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 323         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 324
 325         return len;
 326 }
 327
 328 #define pct(a, b) (b ? a * 100 / b : 0)
 329 static int mdc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 330 {
 331         struct obd_device *dev = seq->private;
 332         struct client_obd *cli = &dev->u.cli;
 333         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 334         int i;
 335
 336         obd_mod_rpc_stats_seq_show(&dev->u.cli, seq);
 337
 338         spin_lock(&cli->cl_loi_list_lock);
 339
 340         seq_printf(seq, "\nread RPCs in flight:  %d\n",
 341                    cli->cl_r_in_flight);
 342         seq_printf(seq, "write RPCs in flight: %d\n",
 343                    cli->cl_w_in_flight);
 344         seq_printf(seq, "pending write pages:  %d\n",
 345                    atomic_read(&cli->cl_pending_w_pages));
 346         seq_printf(seq, "pending read pages:   %d\n",
 347                    atomic_read(&cli->cl_pending_r_pages));
 348
 349         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 350         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 351         seq_printf(seq, "       rpcs   %% cum %%\n");
 352
 353         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 354         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 355
 356         read_cum = 0;
 357         write_cum = 0;
 358         for (i = 0; i < OBD_HIST_MAX; i++) {
 359                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 360                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 361
 362                 read_cum += r;
 363                 write_cum += w;
 364                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 365                            1 << i, r, pct(r, read_tot),
 366                            pct(read_cum, read_tot), w,
 367                            pct(w, write_tot),
 368                            pct(write_cum, write_tot));
 369                 if (read_cum == read_tot && write_cum == write_tot)
 370                         break;
 371         }
 372
 373         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 374         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 375         seq_printf(seq, "       rpcs   %% cum %%\n");
 376
 377         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 378         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 379
 380         read_cum = 0;
 381         write_cum = 0;
 382         for (i = 0; i < OBD_HIST_MAX; i++) {
 383                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 384                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 385
 386                 read_cum += r;
 387                 write_cum += w;
 388                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 389                            i, r, pct(r, read_tot), pct(read_cum, read_tot), w,
 390                            pct(w, write_tot), pct(write_cum, write_tot));
 391                 if (read_cum == read_tot && write_cum == write_tot)
 392                         break;
 393         }
 394
 395         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 396         seq_printf(seq, "offset                rpcs   %% cum %% |");
 397         seq_printf(seq, "       rpcs   %% cum %%\n");
 398
 399         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 400         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 401
 402         read_cum = 0;
 403         write_cum = 0;
 404         for (i = 0; i < OBD_HIST_MAX; i++) {
 405                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 406                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 407
 408                 read_cum += r;
 409                 write_cum += w;
 410                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 411                            (i == 0) ? 0 : 1 << (i - 1),
 412                            r, pct(r, read_tot), pct(read_cum, read_tot),
 413                            w, pct(w, write_tot), pct(write_cum, write_tot));
 414                 if (read_cum == read_tot && write_cum == write_tot)
 415                         break;
 416         }
 417         spin_unlock(&cli->cl_loi_list_lock);
 418
 419         return 0;
 420 }
 421 #undef pct
 422 LPROC_SEQ_FOPS(mdc_rpc_stats);
 423
 424 static int mdc_stats_seq_show(struct seq_file *seq, void *v)
 425 {
 426         struct timespec64 now;
 427         struct obd_device *dev = seq->private;
 428         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 429
 430         ktime_get_real_ts64(&now);
 431
 432         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 433                    (s64)now.tv_sec, now.tv_nsec);
 434         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 435                    stats->os_lockless_writes);
 436         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 437                    stats->os_lockless_reads);
 438         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 439                    stats->os_lockless_truncates);
 440         return 0;
 441 }
 442
 443 static ssize_t mdc_stats_seq_write(struct file *file,
 444                                    const char __user *buf,
 445                                    size_t len, loff_t *off)
 446 {
 447         struct seq_file *seq = file->private_data;
 448         struct obd_device *dev = seq->private;
 449         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 450
 451         memset(stats, 0, sizeof(*stats));
 452         return len;
 453 }
 454 LPROC_SEQ_FOPS(mdc_stats);
 455
 456 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 457 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 458 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 459 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 460 LPROC_SEQ_FOPS_RW_TYPE(mdc, obd_max_pages_per_rpc);
 461 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 462 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 463
 464 struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 465         { .name =       "connect_flags",
 466           .fops =       &mdc_connect_flags_fops },
 467         { .name =       "mds_server_uuid",
 468           .fops =       &mdc_server_uuid_fops   },
 469         { .name =       "max_pages_per_rpc",
 470           .fops =       &mdc_obd_max_pages_per_rpc_fops },
 471         { .name =       "max_dirty_mb",
 472           .fops =       &mdc_max_dirty_mb_fops          },
 473         { .name =       "mdc_cached_mb",
 474           .fops =       &mdc_cached_mb_fops             },
 475         { .name =       "timeouts",
 476           .fops =       &mdc_timeouts_fops              },
 477         { .name =       "import",
 478           .fops =       &mdc_import_fops                },
 479         { .name =       "state",
 480           .fops =       &mdc_state_fops                 },
 481         { .name =       "pinger_recov",
 482           .fops =       &mdc_pinger_recov_fops          },
 483         { .name =       "rpc_stats",
 484           .fops =       &mdc_rpc_stats_fops             },
 485         { .name =       "unstable_stats",
 486           .fops =       &mdc_unstable_stats_fops        },
 487         { .name =       "mdc_stats",
 488           .fops =       &mdc_stats_fops                 },
 489         { NULL }
 490 };
 491
 492 static struct attribute *mdc_attrs[] = {
 493         &lustre_attr_active.attr,
 494         &lustre_attr_max_rpcs_in_flight.attr,
 495         &lustre_attr_max_mod_rpcs_in_flight.attr,
 496         &lustre_attr_contention_seconds.attr,
 497         &lustre_attr_conn_uuid.attr,
 498         &lustre_attr_ping.attr,
 499         NULL,
 500 };
 501
 502 int mdc_tunables_init(struct obd_device *obd)
 503 {
 504         int rc;
 505
 506         obd->obd_ktype.default_attrs = mdc_attrs;
 507         obd->obd_vars = lprocfs_mdc_obd_vars;
 508
 509         rc = lprocfs_obd_setup(obd, false);
 510         if (rc)
 511                 goto out_failed;
 512 #ifdef CONFIG_PROC_FS
 513         rc = lprocfs_alloc_md_stats(obd, 0);
 514         if (rc) {
 515                 lprocfs_obd_cleanup(obd);
 516                 goto out_failed;
 517         }
 518 #endif
 519         rc = sptlrpc_lprocfs_cliobd_attach(obd);
 520         if (rc) {
 521 #ifdef CONFIG_PROC_FS
 522                 lprocfs_free_md_stats(obd);
 523 #endif
 524                 lprocfs_obd_cleanup(obd);
 525                 goto out_failed;
 526         }
 527         ptlrpc_lprocfs_register_obd(obd);
 528
 529 out_failed:
 530         return rc;
 531 }