lustre/osc/lproc_osc.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/version.h>
  35 #include <asm/statfs.h>
  36 #include <obd_cksum.h>
  37 #include <obd_class.h>
  38 #include <lprocfs_status.h>
  39 #include <linux/seq_file.h>
  40 #include <lustre_osc.h>
  41
  42 #include "osc_internal.h"
  43
  44 #ifdef CONFIG_PROC_FS
  45 static int osc_active_seq_show(struct seq_file *m, void *v)
  46 {
  47         struct obd_device *dev = m->private;
  48
  49         LPROCFS_CLIMP_CHECK(dev);
  50         seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  51         LPROCFS_CLIMP_EXIT(dev);
  52         return 0;
  53 }
  54
  55 static ssize_t osc_active_seq_write(struct file *file,
  56                                     const char __user *buffer,
  57                                     size_t count, loff_t *off)
  58 {
  59         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  60         bool val;
  61         int rc;
  62
  63         rc = kstrtobool_from_user(buffer, count, &val);
  64         if (rc)
  65                 return rc;
  66
  67         /* opposite senses */
  68         if (dev->u.cli.cl_import->imp_deactive == val)
  69                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  70         else
  71                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n",
  72                         (int)val);
  73
  74         return count;
  75 }
  76 LPROC_SEQ_FOPS(osc_active);
  77
  78 static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
  79 {
  80         struct obd_device *dev = m->private;
  81         struct client_obd *cli = &dev->u.cli;
  82
  83         spin_lock(&cli->cl_loi_list_lock);
  84         seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
  85         spin_unlock(&cli->cl_loi_list_lock);
  86         return 0;
  87 }
  88
  89 static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
  90                                                 const char __user *buffer,
  91                                                 size_t count, loff_t *off)
  92 {
  93         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  94         struct client_obd *cli = &dev->u.cli;
  95         int adding, added, req_count;
  96         unsigned int val;
  97         int rc;
  98
  99         rc = kstrtouint_from_user(buffer, count, 0, &val);
 100         if (rc)
 101                 return rc;
 102
 103         if (val == 0 || val > OSC_MAX_RIF_MAX)
 104                 return -ERANGE;
 105
 106         LPROCFS_CLIMP_CHECK(dev);
 107
 108         adding = (int)val - cli->cl_max_rpcs_in_flight;
 109         req_count = atomic_read(&osc_pool_req_count);
 110         if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
 111                 /*
 112                  * There might be some race which will cause over-limit
 113                  * allocation, but it is fine.
 114                  */
 115                 if (req_count + adding > osc_reqpool_maxreqcount)
 116                         adding = osc_reqpool_maxreqcount - req_count;
 117
 118                 added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
 119                 atomic_add(added, &osc_pool_req_count);
 120         }
 121
 122         spin_lock(&cli->cl_loi_list_lock);
 123         cli->cl_max_rpcs_in_flight = val;
 124         client_adjust_max_dirty(cli);
 125         spin_unlock(&cli->cl_loi_list_lock);
 126
 127         LPROCFS_CLIMP_EXIT(dev);
 128         return count;
 129 }
 130 LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
 131
 132 static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 133 {
 134         struct obd_device *dev = m->private;
 135         struct client_obd *cli = &dev->u.cli;
 136         long val;
 137         int mult;
 138
 139         spin_lock(&cli->cl_loi_list_lock);
 140         val = cli->cl_dirty_max_pages;
 141         spin_unlock(&cli->cl_loi_list_lock);
 142
 143         mult = 1 << (20 - PAGE_SHIFT);
 144         return lprocfs_seq_read_frac_helper(m, val, mult);
 145 }
 146
 147 static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
 148                                           const char __user *buffer,
 149                                           size_t count, loff_t *off)
 150 {
 151         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 152         struct client_obd *cli = &dev->u.cli;
 153         int rc;
 154         __s64 pages_number;
 155
 156         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 157         if (rc)
 158                 return rc;
 159
 160         pages_number >>= PAGE_SHIFT;
 161
 162         if (pages_number <= 0 ||
 163             pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 164             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 165                 return -ERANGE;
 166
 167         spin_lock(&cli->cl_loi_list_lock);
 168         cli->cl_dirty_max_pages = pages_number;
 169         osc_wake_cache_waiters(cli);
 170         spin_unlock(&cli->cl_loi_list_lock);
 171
 172         return count;
 173 }
 174 LPROC_SEQ_FOPS(osc_max_dirty_mb);
 175
 176 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 177 {
 178         struct obd_device *dev = m->private;
 179         struct client_obd *cli = &dev->u.cli;
 180         int shift = 20 - PAGE_SHIFT;
 181
 182         seq_printf(m, "used_mb: %ld\n"
 183                    "busy_cnt: %ld\n"
 184                    "reclaim: %llu\n",
 185                    (atomic_long_read(&cli->cl_lru_in_list) +
 186                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 187                     atomic_long_read(&cli->cl_lru_busy),
 188                    cli->cl_lru_reclaim);
 189
 190         return 0;
 191 }
 192
 193 /* shrink the number of caching pages to a specific number */
 194 static ssize_t
 195 osc_cached_mb_seq_write(struct file *file, const char __user *buffer,
 196                         size_t count, loff_t *off)
 197 {
 198         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 199         struct client_obd *cli = &dev->u.cli;
 200         __s64 pages_number;
 201         long rc;
 202         char kernbuf[128];
 203
 204         if (count >= sizeof(kernbuf))
 205                 return -EINVAL;
 206
 207         if (copy_from_user(kernbuf, buffer, count))
 208                 return -EFAULT;
 209         kernbuf[count] = 0;
 210
 211         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 212                   kernbuf;
 213         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 214         if (rc)
 215                 return rc;
 216
 217         pages_number >>= PAGE_SHIFT;
 218
 219         if (pages_number < 0)
 220                 return -ERANGE;
 221
 222         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 223         if (rc > 0) {
 224                 struct lu_env *env;
 225                 __u16 refcheck;
 226
 227                 env = cl_env_get(&refcheck);
 228                 if (!IS_ERR(env)) {
 229                         (void)osc_lru_shrink(env, cli, rc, true);
 230                         cl_env_put(env, &refcheck);
 231                 }
 232         }
 233
 234         return count;
 235 }
 236 LPROC_SEQ_FOPS(osc_cached_mb);
 237
 238 static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
 239 {
 240         struct obd_device *dev = m->private;
 241         struct client_obd *cli = &dev->u.cli;
 242
 243         spin_lock(&cli->cl_loi_list_lock);
 244         seq_printf(m, "%lu\n", cli->cl_dirty_pages << PAGE_SHIFT);
 245         spin_unlock(&cli->cl_loi_list_lock);
 246         return 0;
 247 }
 248 LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
 249
 250 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
 251 {
 252         struct obd_device *dev = m->private;
 253         struct client_obd *cli = &dev->u.cli;
 254
 255         spin_lock(&cli->cl_loi_list_lock);
 256         seq_printf(m, "%lu\n", cli->cl_avail_grant);
 257         spin_unlock(&cli->cl_loi_list_lock);
 258         return 0;
 259 }
 260
 261 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
 262                                              const char __user *buffer,
 263                                              size_t count, loff_t *off)
 264 {
 265         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 266         struct client_obd *cli = &obd->u.cli;
 267         s64 val;
 268         int rc;
 269
 270         if (obd == NULL)
 271                 return 0;
 272
 273         rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
 274         if (rc)
 275                 return rc;
 276         if (val < 0)
 277                 return -ERANGE;
 278
 279         /* this is only for shrinking grant */
 280         spin_lock(&cli->cl_loi_list_lock);
 281         if (val >= cli->cl_avail_grant) {
 282                 spin_unlock(&cli->cl_loi_list_lock);
 283                 return 0;
 284         }
 285
 286         spin_unlock(&cli->cl_loi_list_lock);
 287
 288         LPROCFS_CLIMP_CHECK(obd);
 289         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 290                 rc = osc_shrink_grant_to_target(cli, val);
 291         LPROCFS_CLIMP_EXIT(obd);
 292         if (rc)
 293                 return rc;
 294         return count;
 295 }
 296 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
 297
 298 static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
 299 {
 300         struct obd_device *dev = m->private;
 301         struct client_obd *cli = &dev->u.cli;
 302
 303         spin_lock(&cli->cl_loi_list_lock);
 304         seq_printf(m, "%lu\n", cli->cl_lost_grant);
 305         spin_unlock(&cli->cl_loi_list_lock);
 306         return 0;
 307 }
 308 LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
 309
 310 static int osc_cur_dirty_grant_bytes_seq_show(struct seq_file *m, void *v)
 311 {
 312         struct obd_device *dev = m->private;
 313         struct client_obd *cli = &dev->u.cli;
 314
 315         spin_lock(&cli->cl_loi_list_lock);
 316         seq_printf(m, "%lu\n", cli->cl_dirty_grant);
 317         spin_unlock(&cli->cl_loi_list_lock);
 318         return 0;
 319 }
 320 LPROC_SEQ_FOPS_RO(osc_cur_dirty_grant_bytes);
 321
 322 static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
 323 {
 324         struct obd_device *obd = m->private;
 325
 326         if (obd == NULL)
 327                 return 0;
 328         seq_printf(m, "%lld\n",
 329                    obd->u.cli.cl_grant_shrink_interval);
 330         return 0;
 331 }
 332
 333 static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
 334                                                    const char __user *buffer,
 335                                                    size_t count, loff_t *off)
 336 {
 337         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 338         unsigned int val;
 339         int rc;
 340
 341         if (obd == NULL)
 342                 return 0;
 343
 344         rc = kstrtouint_from_user(buffer, count, 0, &val);
 345         if (rc)
 346                 return rc;
 347
 348         if (val == 0)
 349                 return -ERANGE;
 350
 351         obd->u.cli.cl_grant_shrink_interval = val;
 352
 353         return count;
 354 }
 355 LPROC_SEQ_FOPS(osc_grant_shrink_interval);
 356
 357 static int osc_checksum_seq_show(struct seq_file *m, void *v)
 358 {
 359         struct obd_device *obd = m->private;
 360
 361         if (obd == NULL)
 362                 return 0;
 363
 364         seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 365         return 0;
 366 }
 367
 368 static ssize_t osc_checksum_seq_write(struct file *file,
 369                                       const char __user *buffer,
 370                                       size_t count, loff_t *off)
 371 {
 372         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 373         bool val;
 374         int rc;
 375
 376         if (obd == NULL)
 377                 return 0;
 378
 379         rc = kstrtobool_from_user(buffer, count, &val);
 380         if (rc)
 381                 return rc;
 382
 383         obd->u.cli.cl_checksum = val;
 384
 385         return count;
 386 }
 387 LPROC_SEQ_FOPS(osc_checksum);
 388
 389 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 390 {
 391         struct obd_device *obd = m->private;
 392         int i;
 393         DECLARE_CKSUM_NAME;
 394
 395         if (obd == NULL)
 396                 return 0;
 397
 398         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 399                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 400                         continue;
 401                 if (obd->u.cli.cl_cksum_type == (1 << i))
 402                         seq_printf(m, "[%s] ", cksum_name[i]);
 403                 else
 404                         seq_printf(m, "%s ", cksum_name[i]);
 405         }
 406         seq_printf(m, "\n");
 407         return 0;
 408 }
 409
 410 static ssize_t osc_checksum_type_seq_write(struct file *file,
 411                                            const char __user *buffer,
 412                                            size_t count, loff_t *off)
 413 {
 414         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 415         int i;
 416         DECLARE_CKSUM_NAME;
 417         char kernbuf[10];
 418
 419         if (obd == NULL)
 420                 return 0;
 421
 422         if (count > sizeof(kernbuf) - 1)
 423                 return -EINVAL;
 424         if (copy_from_user(kernbuf, buffer, count))
 425                 return -EFAULT;
 426         if (count > 0 && kernbuf[count - 1] == '\n')
 427                 kernbuf[count - 1] = '\0';
 428         else
 429                 kernbuf[count] = '\0';
 430
 431         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 432                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 433                         continue;
 434                 if (!strcmp(kernbuf, cksum_name[i])) {
 435                        obd->u.cli.cl_cksum_type = 1 << i;
 436                        return count;
 437                 }
 438         }
 439         return -EINVAL;
 440 }
 441 LPROC_SEQ_FOPS(osc_checksum_type);
 442
 443 static int osc_resend_count_seq_show(struct seq_file *m, void *v)
 444 {
 445         struct obd_device *obd = m->private;
 446
 447         seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 448         return 0;
 449 }
 450
 451 static ssize_t osc_resend_count_seq_write(struct file *file,
 452                                           const char __user *buffer,
 453                                           size_t count, loff_t *off)
 454 {
 455         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 456         unsigned int val;
 457         int rc;
 458
 459         rc = kstrtouint_from_user(buffer, count, 0, &val);
 460         if (rc)
 461                 return rc;
 462
 463         atomic_set(&obd->u.cli.cl_resends, val);
 464
 465         return count;
 466 }
 467 LPROC_SEQ_FOPS(osc_resend_count);
 468
 469 static int osc_checksum_dump_seq_show(struct seq_file *m, void *v)
 470 {
 471         struct obd_device *obd = m->private;
 472
 473         if (obd == NULL)
 474                 return 0;
 475
 476         seq_printf(m, "%d\n", obd->u.cli.cl_checksum_dump ? 1 : 0);
 477         return 0;
 478 }
 479
 480 static ssize_t osc_checksum_dump_seq_write(struct file *file,
 481                                            const char __user *buffer,
 482                                            size_t count, loff_t *off)
 483 {
 484         struct obd_device *obd;
 485         bool val;
 486         int rc;
 487
 488         obd = ((struct seq_file *)file->private_data)->private;
 489         if (obd == NULL)
 490                 return 0;
 491
 492         rc = kstrtobool_from_user(buffer, count, &val);
 493         if (rc)
 494                 return rc;
 495
 496         obd->u.cli.cl_checksum_dump = val;
 497
 498         return count;
 499 }
 500 LPROC_SEQ_FOPS(osc_checksum_dump);
 501
 502 static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
 503 {
 504         struct obd_device *obd = m->private;
 505         struct osc_device *od  = obd2osc_dev(obd);
 506
 507         seq_printf(m, "%lld\n", od->od_contention_time);
 508         return 0;
 509 }
 510
 511 static ssize_t osc_contention_seconds_seq_write(struct file *file,
 512                                                 const char __user *buffer,
 513                                                 size_t count, loff_t *off)
 514 {
 515         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 516         struct osc_device *od  = obd2osc_dev(obd);
 517         unsigned int val;
 518         int rc;
 519
 520         rc = kstrtouint_from_user(buffer, count, 0, &val);
 521         if (rc)
 522                 return rc;
 523         if (val < 0 || val > INT_MAX)
 524                 return -ERANGE;
 525
 526         od->od_contention_time = val;
 527
 528         return count;
 529 }
 530 LPROC_SEQ_FOPS(osc_contention_seconds);
 531
 532 static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
 533 {
 534         struct obd_device *obd = m->private;
 535         struct osc_device *od  = obd2osc_dev(obd);
 536
 537         seq_printf(m, "%u\n", od->od_lockless_truncate);
 538         return 0;
 539 }
 540
 541 static ssize_t osc_lockless_truncate_seq_write(struct file *file,
 542                                                const char __user *buffer,
 543                                     size_t count, loff_t *off)
 544 {
 545         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 546         struct osc_device *od  = obd2osc_dev(obd);
 547         bool val;
 548         int rc;
 549
 550         rc = kstrtobool_from_user(buffer, count, &val);
 551         if (rc)
 552                 return rc;
 553
 554         od->od_lockless_truncate = val;
 555
 556         return count;
 557 }
 558 LPROC_SEQ_FOPS(osc_lockless_truncate);
 559
 560 static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
 561 {
 562         struct obd_device *obd = m->private;
 563         seq_printf(m, "%u\n",
 564                    atomic_read(&obd->u.cli.cl_destroy_in_flight));
 565         return 0;
 566 }
 567 LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
 568
 569 LPROC_SEQ_FOPS_RW_TYPE(osc, obd_max_pages_per_rpc);
 570
 571 LPROC_SEQ_FOPS_RW_TYPE(osc, obd_short_io_bytes);
 572
 573 static int osc_unstable_stats_seq_show(struct seq_file *m, void *v)
 574 {
 575         struct obd_device *dev = m->private;
 576         struct client_obd *cli = &dev->u.cli;
 577         long pages;
 578         int mb;
 579
 580         pages = atomic_long_read(&cli->cl_unstable_count);
 581         mb    = (pages * PAGE_SIZE) >> 20;
 582
 583         seq_printf(m, "unstable_pages: %20ld\n"
 584                    "unstable_mb:              %10d\n",
 585                    pages, mb);
 586         return 0;
 587 }
 588 LPROC_SEQ_FOPS_RO(osc_unstable_stats);
 589
 590 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 591 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 592 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 593 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 594 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 595
 596 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 597
 598 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 599 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 600
 601 struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 602         { .name =       "ping",
 603           .fops =       &osc_ping_fops,
 604           .proc_mode =  0222                            },
 605         { .name =       "connect_flags",
 606           .fops =       &osc_connect_flags_fops         },
 607         { .name =       "ost_server_uuid",
 608           .fops =       &osc_server_uuid_fops           },
 609         { .name =       "ost_conn_uuid",
 610           .fops =       &osc_conn_uuid_fops             },
 611         { .name =       "active",
 612           .fops =       &osc_active_fops                },
 613         { .name =       "max_pages_per_rpc",
 614           .fops =       &osc_obd_max_pages_per_rpc_fops },
 615         { .name =       "short_io_bytes",
 616           .fops =       &osc_obd_short_io_bytes_fops    },
 617         { .name =       "max_rpcs_in_flight",
 618           .fops =       &osc_max_rpcs_in_flight_fops    },
 619         { .name =       "destroys_in_flight",
 620           .fops =       &osc_destroys_in_flight_fops    },
 621         { .name =       "max_dirty_mb",
 622           .fops =       &osc_max_dirty_mb_fops          },
 623         { .name =       "osc_cached_mb",
 624           .fops =       &osc_cached_mb_fops             },
 625         { .name =       "cur_dirty_bytes",
 626           .fops =       &osc_cur_dirty_bytes_fops       },
 627         { .name =       "cur_grant_bytes",
 628           .fops =       &osc_cur_grant_bytes_fops       },
 629         { .name =       "cur_lost_grant_bytes",
 630           .fops =       &osc_cur_lost_grant_bytes_fops  },
 631         { .name =       "cur_dirty_grant_bytes",
 632           .fops =       &osc_cur_dirty_grant_bytes_fops },
 633         { .name =       "grant_shrink_interval",
 634           .fops =       &osc_grant_shrink_interval_fops },
 635         { .name =       "checksums",
 636           .fops =       &osc_checksum_fops              },
 637         { .name =       "checksum_type",
 638           .fops =       &osc_checksum_type_fops         },
 639         { .name =       "checksum_dump",
 640           .fops =       &osc_checksum_dump_fops         },
 641         { .name =       "resend_count",
 642           .fops =       &osc_resend_count_fops          },
 643         { .name =       "timeouts",
 644           .fops =       &osc_timeouts_fops              },
 645         { .name =       "contention_seconds",
 646           .fops =       &osc_contention_seconds_fops    },
 647         { .name =       "lockless_truncate",
 648           .fops =       &osc_lockless_truncate_fops     },
 649         { .name =       "import",
 650           .fops =       &osc_import_fops                },
 651         { .name =       "state",
 652           .fops =       &osc_state_fops                 },
 653         { .name =       "pinger_recov",
 654           .fops =       &osc_pinger_recov_fops          },
 655         { .name =       "unstable_stats",
 656           .fops =       &osc_unstable_stats_fops        },
 657         { NULL }
 658 };
 659
 660 #define pct(a,b) (b ? a * 100 / b : 0)
 661
 662 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 663 {
 664         struct timespec64 now;
 665         struct obd_device *dev = seq->private;
 666         struct client_obd *cli = &dev->u.cli;
 667         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 668         int i;
 669
 670         ktime_get_real_ts64(&now);
 671
 672         spin_lock(&cli->cl_loi_list_lock);
 673
 674         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 675                    (s64)now.tv_sec, now.tv_nsec);
 676         seq_printf(seq, "read RPCs in flight:  %d\n",
 677                    cli->cl_r_in_flight);
 678         seq_printf(seq, "write RPCs in flight: %d\n",
 679                    cli->cl_w_in_flight);
 680         seq_printf(seq, "pending write pages:  %d\n",
 681                    atomic_read(&cli->cl_pending_w_pages));
 682         seq_printf(seq, "pending read pages:   %d\n",
 683                    atomic_read(&cli->cl_pending_r_pages));
 684
 685         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 686         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 687         seq_printf(seq, "       rpcs   %% cum %%\n");
 688
 689         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 690         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 691
 692         read_cum = 0;
 693         write_cum = 0;
 694         for (i = 0; i < OBD_HIST_MAX; i++) {
 695                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 696                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 697
 698                 read_cum += r;
 699                 write_cum += w;
 700                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 701                            1 << i, r, pct(r, read_tot),
 702                            pct(read_cum, read_tot), w,
 703                            pct(w, write_tot),
 704                            pct(write_cum, write_tot));
 705                 if (read_cum == read_tot && write_cum == write_tot)
 706                         break;
 707         }
 708
 709         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 710         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 711         seq_printf(seq, "       rpcs   %% cum %%\n");
 712
 713         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 714         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 715
 716         read_cum = 0;
 717         write_cum = 0;
 718         for (i = 0; i < OBD_HIST_MAX; i++) {
 719                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 720                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 721                 read_cum += r;
 722                 write_cum += w;
 723                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 724                            i, r, pct(r, read_tot),
 725                            pct(read_cum, read_tot), w,
 726                            pct(w, write_tot),
 727                            pct(write_cum, write_tot));
 728                 if (read_cum == read_tot && write_cum == write_tot)
 729                         break;
 730         }
 731
 732         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 733         seq_printf(seq, "offset                rpcs   %% cum %% |");
 734         seq_printf(seq, "       rpcs   %% cum %%\n");
 735
 736         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 737         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 738
 739         read_cum = 0;
 740         write_cum = 0;
 741         for (i = 0; i < OBD_HIST_MAX; i++) {
 742                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 743                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 744                 read_cum += r;
 745                 write_cum += w;
 746                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 747                            (i == 0) ? 0 : 1 << (i - 1),
 748                            r, pct(r, read_tot), pct(read_cum, read_tot),
 749                            w, pct(w, write_tot), pct(write_cum, write_tot));
 750                 if (read_cum == read_tot && write_cum == write_tot)
 751                         break;
 752         }
 753
 754         spin_unlock(&cli->cl_loi_list_lock);
 755
 756         return 0;
 757 }
 758 #undef pct
 759
 760 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 761                                        const char __user *buf,
 762                                        size_t len, loff_t *off)
 763 {
 764         struct seq_file *seq = file->private_data;
 765         struct obd_device *dev = seq->private;
 766         struct client_obd *cli = &dev->u.cli;
 767
 768         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 769         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 770         lprocfs_oh_clear(&cli->cl_read_page_hist);
 771         lprocfs_oh_clear(&cli->cl_write_page_hist);
 772         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 773         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 774
 775         return len;
 776 }
 777 LPROC_SEQ_FOPS(osc_rpc_stats);
 778
 779 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 780 {
 781         struct timespec64 now;
 782         struct obd_device *dev = seq->private;
 783         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 784
 785         ktime_get_real_ts64(&now);
 786
 787         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 788                    (s64)now.tv_sec, now.tv_nsec);
 789         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 790                    stats->os_lockless_writes);
 791         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 792                    stats->os_lockless_reads);
 793         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 794                    stats->os_lockless_truncates);
 795         return 0;
 796 }
 797
 798 static ssize_t osc_stats_seq_write(struct file *file,
 799                                    const char __user *buf,
 800                                    size_t len, loff_t *off)
 801 {
 802         struct seq_file *seq = file->private_data;
 803         struct obd_device *dev = seq->private;
 804         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 805
 806         memset(stats, 0, sizeof(*stats));
 807         return len;
 808 }
 809
 810 LPROC_SEQ_FOPS(osc_stats);
 811
 812 int lproc_osc_attach_seqstat(struct obd_device *dev)
 813 {
 814         int rc;
 815
 816         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 817                                 &osc_stats_fops, dev);
 818         if (rc == 0)
 819                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 820                                             &osc_rpc_stats_fops, dev);
 821
 822         return rc;
 823 }
 824 #endif /* CONFIG_PROC_FS */