lustre/mdt/mdt_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) 2007, 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  *
  31  * lustre/mdt/mdt_lproc.c
  32  *
  33  * Author: Lai Siyao <lsy@clusterfs.com>
  34  * Author: Fan Yong <fanyong@clusterfs.com>
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_MDS
  38
  39 #include <linux/version.h>
  40 #include <asm/statfs.h>
  41
  42 #include <linux/module.h>
  43 #include <uapi/linux/lnet/nidstr.h>
  44 /* LUSTRE_VERSION_CODE */
  45 #include <uapi/linux/lustre/lustre_ver.h>
  46 /*
  47  * struct OBD_{ALLOC,FREE}*()
  48  * MDT_FAIL_CHECK
  49  */
  50 #include <obd_support.h>
  51 /* struct obd_export */
  52 #include <lustre_export.h>
  53 /* struct obd_device */
  54 #include <obd.h>
  55 #include <obd_class.h>
  56 #include <lustre_mds.h>
  57 #include <lprocfs_status.h>
  58 #include "mdt_internal.h"
  59
  60 /**
  61  * The rename stats output would be YAML formats, like
  62  * rename_stats:
  63  * - snapshot_time: 1234567890.123456
  64  * - same_dir:
  65  *     4kB: { samples: 1230, pct: 33, cum_pct: 45 }
  66  *     8kB: { samples: 1242, pct: 33, cum_pct: 78 }
  67  *     16kB: { samples: 132, pct: 3, cum_pct: 81 }
  68  * - crossdir_src:
  69  *     4kB: { samples: 123, pct: 33, cum_pct: 45 }
  70  *     8kB: { samples: 124, pct: 33, cum_pct: 78 }
  71  *     16kB: { samples: 12, pct: 3, cum_pct: 81 }
  72  * - crossdir_tgt:
  73  *     4kB: { samples: 123, pct: 33, cum_pct: 45 }
  74  *     8kB: { samples: 124, pct: 33, cum_pct: 78 }
  75  *     16kB: { samples: 12, pct: 3, cum_pct: 81 }
  76  **/
  77
  78 static void display_rename_stats(struct seq_file *seq, char *name,
  79                                  struct obd_histogram *hist)
  80 {
  81         unsigned long tot, t, cum = 0;
  82         int i;
  83
  84         tot = lprocfs_oh_sum(hist);
  85         if (tot > 0)
  86                 seq_printf(seq, "- %-15s\n", name);
  87         /* dir size start from 4K, start i from 10(2^10) here */
  88         for (i = 0; i < OBD_HIST_MAX; i++) {
  89                 t = hist->oh_buckets[i];
  90                 cum += t;
  91                 if (cum == 0)
  92                         continue;
  93
  94                 if (i < 10)
  95                         seq_printf(seq, "%6s%d%s", " ", 1<< i, "bytes:");
  96                 else if (i < 20)
  97                         seq_printf(seq, "%6s%d%s", " ", 1<<(i-10), "KB:");
  98                 else
  99                         seq_printf(seq, "%6s%d%s", " ", 1<<(i-20), "MB:");
 100
 101                 seq_printf(seq, " { sample: %3lu, pct: %3u, cum_pct: %3u }\n",
 102                            t, pct(t, tot), pct(cum, tot));
 103
 104                 if (cum == tot)
 105                         break;
 106         }
 107 }
 108
 109 static void rename_stats_show(struct seq_file *seq,
 110                               struct rename_stats *rename_stats)
 111 {
 112         struct timespec64 now;
 113
 114         /* this sampling races with updates */
 115         ktime_get_real_ts64(&now);
 116         seq_printf(seq, "rename_stats:\n");
 117         seq_printf(seq, "- %-15s %llu.%9lu\n", "snapshot_time:",
 118                    (s64)now.tv_sec, now.tv_nsec);
 119
 120         display_rename_stats(seq, "same_dir",
 121                              &rename_stats->hist[RENAME_SAMEDIR_SIZE]);
 122         display_rename_stats(seq, "crossdir_src",
 123                              &rename_stats->hist[RENAME_CROSSDIR_SRC_SIZE]);
 124         display_rename_stats(seq, "crossdir_tgt",
 125                              &rename_stats->hist[RENAME_CROSSDIR_TGT_SIZE]);
 126 }
 127
 128 static int mdt_rename_stats_seq_show(struct seq_file *seq, void *v)
 129 {
 130         struct mdt_device *mdt = seq->private;
 131
 132         rename_stats_show(seq, &mdt->mdt_rename_stats);
 133
 134         return 0;
 135 }
 136
 137 static ssize_t
 138 mdt_rename_stats_seq_write(struct file *file, const char __user *buf,
 139                            size_t len, loff_t *off)
 140 {
 141         struct seq_file *seq = file->private_data;
 142         struct mdt_device *mdt = seq->private;
 143         int i;
 144
 145         for (i = 0; i < RENAME_LAST; i++)
 146                 lprocfs_oh_clear(&mdt->mdt_rename_stats.hist[i]);
 147
 148         return len;
 149 }
 150 LPROC_SEQ_FOPS(mdt_rename_stats);
 151
 152 static int lproc_mdt_attach_rename_seqstat(struct mdt_device *mdt)
 153 {
 154         int i;
 155
 156         for (i = 0; i < RENAME_LAST; i++)
 157                 spin_lock_init(&mdt->mdt_rename_stats.hist[i].oh_lock);
 158
 159         return lprocfs_obd_seq_create(mdt2obd_dev(mdt), "rename_stats", 0644,
 160                                       &mdt_rename_stats_fops, mdt);
 161 }
 162
 163 void mdt_rename_counter_tally(struct mdt_thread_info *info,
 164                               struct mdt_device *mdt,
 165                               struct ptlrpc_request *req,
 166                               struct mdt_object *src,
 167                               struct mdt_object *tgt, long count)
 168 {
 169         struct md_attr *ma = &info->mti_attr;
 170         struct rename_stats *rstats = &mdt->mdt_rename_stats;
 171         int rc;
 172
 173         ma->ma_need = MA_INODE;
 174         ma->ma_valid = 0;
 175         rc = mo_attr_get(info->mti_env, mdt_object_child(src), ma);
 176         if (rc) {
 177                 CERROR("%s: "DFID" attr_get, rc = %d\n",
 178                        mdt_obd_name(mdt), PFID(mdt_object_fid(src)), rc);
 179                 return;
 180         }
 181
 182         if (src == tgt) {
 183                 mdt_counter_incr(req, LPROC_MDT_SAMEDIR_RENAME, count);
 184                 lprocfs_oh_tally_log2(&rstats->hist[RENAME_SAMEDIR_SIZE],
 185                                       (unsigned int)ma->ma_attr.la_size);
 186                 return;
 187         }
 188
 189         mdt_counter_incr(req, LPROC_MDT_CROSSDIR_RENAME, count);
 190         lprocfs_oh_tally_log2(&rstats->hist[RENAME_CROSSDIR_SRC_SIZE],
 191                               (unsigned int)ma->ma_attr.la_size);
 192
 193         ma->ma_need = MA_INODE;
 194         ma->ma_valid = 0;
 195         rc = mo_attr_get(info->mti_env, mdt_object_child(tgt), ma);
 196         if (rc) {
 197                 CERROR("%s: "DFID" attr_get, rc = %d\n",
 198                        mdt_obd_name(mdt), PFID(mdt_object_fid(tgt)), rc);
 199                 return;
 200         }
 201
 202         lprocfs_oh_tally_log2(&rstats->hist[RENAME_CROSSDIR_TGT_SIZE],
 203                               (unsigned int)ma->ma_attr.la_size);
 204 }
 205
 206 static ssize_t identity_expire_show(struct kobject *kobj,
 207                                     struct attribute *attr, char *buf)
 208 {
 209         struct obd_device *obd = container_of(kobj, struct obd_device,
 210                                               obd_kset.kobj);
 211         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 212
 213         return scnprintf(buf, PAGE_SIZE, "%lld\n",
 214                          mdt->mdt_identity_cache->uc_entry_expire);
 215 }
 216
 217 static ssize_t identity_expire_store(struct kobject *kobj,
 218                                      struct attribute *attr,
 219                                      const char *buffer, size_t count)
 220 {
 221         struct obd_device *obd = container_of(kobj, struct obd_device,
 222                                               obd_kset.kobj);
 223         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 224         time64_t val;
 225         int rc;
 226
 227         rc = kstrtoll(buffer, 10, &val);
 228         if (rc)
 229                 return rc;
 230
 231         if (val < 0)
 232                 return -ERANGE;
 233
 234         mdt->mdt_identity_cache->uc_entry_expire = val;
 235
 236         return count;
 237 }
 238 LUSTRE_RW_ATTR(identity_expire);
 239
 240 static ssize_t identity_acquire_expire_show(struct kobject *kobj,
 241                                             struct attribute *attr, char *buf)
 242 {
 243         struct obd_device *obd = container_of(kobj, struct obd_device,
 244                                               obd_kset.kobj);
 245         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 246
 247         return scnprintf(buf, PAGE_SIZE, "%lld\n",
 248                          mdt->mdt_identity_cache->uc_acquire_expire);
 249 }
 250
 251 static ssize_t identity_acquire_expire_store(struct kobject *kobj,
 252                                              struct attribute *attr,
 253                                              const char *buffer, size_t count)
 254 {
 255         struct obd_device *obd = container_of(kobj, struct obd_device,
 256                                               obd_kset.kobj);
 257         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 258         time64_t val;
 259         int rc;
 260
 261         rc = kstrtoll(buffer, 0, &val);
 262         if (rc)
 263                 return rc;
 264
 265         if (val < 0 || val > INT_MAX)
 266                 return -ERANGE;
 267
 268         mdt->mdt_identity_cache->uc_acquire_expire = val;
 269
 270         return count;
 271 }
 272 LUSTRE_RW_ATTR(identity_acquire_expire);
 273
 274 static ssize_t identity_upcall_show(struct kobject *kobj,
 275                                     struct attribute *attr, char *buf)
 276 {
 277         struct obd_device *obd = container_of(kobj, struct obd_device,
 278                                               obd_kset.kobj);
 279         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 280         struct upcall_cache *hash = mdt->mdt_identity_cache;
 281         int rc;
 282
 283         down_read(&hash->uc_upcall_rwsem);
 284         rc = scnprintf(buf, PAGE_SIZE, "%s\n", hash->uc_upcall);
 285         up_read(&hash->uc_upcall_rwsem);
 286         return rc;
 287 }
 288
 289 static ssize_t identity_upcall_store(struct kobject *kobj,
 290                                      struct attribute *attr,
 291                                      const char *buffer, size_t count)
 292 {
 293         struct obd_device *obd = container_of(kobj, struct obd_device,
 294                                               obd_kset.kobj);
 295         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 296         struct upcall_cache *hash = mdt->mdt_identity_cache;
 297
 298         if (count >= UC_CACHE_UPCALL_MAXPATH) {
 299                 CERROR("%s: identity upcall too long\n", mdt_obd_name(mdt));
 300                 return -EINVAL;
 301         }
 302
 303         /* Remove any extraneous bits from the upcall (e.g. linefeeds) */
 304         down_write(&hash->uc_upcall_rwsem);
 305         sscanf(buffer, "%s", hash->uc_upcall);
 306         up_write(&hash->uc_upcall_rwsem);
 307
 308         if (strcmp(hash->uc_name, mdt_obd_name(mdt)) != 0)
 309                 CWARN("%s: write to upcall name %s\n",
 310                       mdt_obd_name(mdt), hash->uc_upcall);
 311
 312         if (strcmp(hash->uc_upcall, "NONE") == 0 && mdt->mdt_opts.mo_acl)
 313                 CWARN("%s: disable \"identity_upcall\" with ACL enabled maybe "
 314                       "cause unexpected \"EACCESS\"\n", mdt_obd_name(mdt));
 315
 316         CDEBUG(D_CONFIG, "%s: identity upcall set to %s\n", mdt_obd_name(mdt),
 317                hash->uc_upcall);
 318         RETURN(count);
 319 }
 320 LUSTRE_RW_ATTR(identity_upcall);
 321
 322 static ssize_t identity_flush_store(struct kobject *kobj,
 323                                     struct attribute *attr,
 324                                     const char *buffer, size_t count)
 325 {
 326         struct obd_device *obd = container_of(kobj, struct obd_device,
 327                                               obd_kset.kobj);
 328         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 329         int uid;
 330         int rc;
 331
 332         rc = kstrtoint(buffer, 0, &uid);
 333         if (rc)
 334                 return rc;
 335
 336         mdt_flush_identity(mdt->mdt_identity_cache, uid);
 337         return count;
 338 }
 339 LUSTRE_WO_ATTR(identity_flush);
 340
 341 static ssize_t
 342 lprocfs_identity_info_seq_write(struct file *file, const char __user *buffer,
 343                                 size_t count, void *data)
 344 {
 345         struct seq_file   *m = file->private_data;
 346         struct obd_device *obd = m->private;
 347         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 348         struct identity_downcall_data *param;
 349         int size = sizeof(*param), rc, checked = 0;
 350
 351 again:
 352         if (count < size) {
 353                 CERROR("%s: invalid data count = %lu, size = %d\n",
 354                        mdt_obd_name(mdt), (unsigned long) count, size);
 355                 return -EINVAL;
 356         }
 357
 358         OBD_ALLOC(param, size);
 359         if (param == NULL)
 360                 return -ENOMEM;
 361
 362         if (copy_from_user(param, buffer, size)) {
 363                 CERROR("%s: bad identity data\n", mdt_obd_name(mdt));
 364                 GOTO(out, rc = -EFAULT);
 365         }
 366
 367         if (checked == 0) {
 368                 checked = 1;
 369                 if (param->idd_magic != IDENTITY_DOWNCALL_MAGIC) {
 370                         CERROR("%s: MDS identity downcall bad params\n",
 371                                mdt_obd_name(mdt));
 372                         GOTO(out, rc = -EINVAL);
 373                 }
 374
 375                 if (param->idd_nperms > N_PERMS_MAX) {
 376                         CERROR("%s: perm count %d more than maximum %d\n",
 377                                mdt_obd_name(mdt), param->idd_nperms,
 378                                N_PERMS_MAX);
 379                         GOTO(out, rc = -EINVAL);
 380                 }
 381
 382                 if (param->idd_ngroups > NGROUPS_MAX) {
 383                         CERROR("%s: group count %d more than maximum %d\n",
 384                                mdt_obd_name(mdt), param->idd_ngroups,
 385                                NGROUPS_MAX);
 386                         GOTO(out, rc = -EINVAL);
 387                 }
 388
 389                 if (param->idd_ngroups) {
 390                         rc = param->idd_ngroups; /* save idd_ngroups */
 391                         OBD_FREE(param, size);
 392                         size = offsetof(struct identity_downcall_data,
 393                                         idd_groups[rc]);
 394                         goto again;
 395                 }
 396         }
 397
 398         rc = upcall_cache_downcall(mdt->mdt_identity_cache, param->idd_err,
 399                                    param->idd_uid, param);
 400
 401 out:
 402         if (param != NULL)
 403                 OBD_FREE(param, size);
 404
 405         return rc ? rc : count;
 406 }
 407 LPROC_SEQ_FOPS_WR_ONLY(mdt, identity_info);
 408
 409 static int mdt_site_stats_seq_show(struct seq_file *m, void *data)
 410 {
 411         struct obd_device *obd = m->private;
 412         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 413
 414         return lu_site_stats_seq_print(mdt_lu_site(mdt), m);
 415 }
 416 LPROC_SEQ_FOPS_RO(mdt_site_stats);
 417
 418 #define BUFLEN (UUID_MAX + 4)
 419
 420 static ssize_t
 421 lprocfs_mds_evict_client_seq_write(struct file *file, const char __user *buf,
 422                                    size_t count, loff_t *off)
 423 {
 424         struct seq_file   *m = file->private_data;
 425         struct obd_device *obd = m->private;
 426         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 427         char *kbuf;
 428         char *tmpbuf;
 429         int rc = 0;
 430
 431         OBD_ALLOC(kbuf, BUFLEN);
 432         if (kbuf == NULL)
 433                 return -ENOMEM;
 434
 435         /*
 436          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
 437          * bytes into kbuf, to ensure that the string is NUL-terminated.
 438          * UUID_MAX should include a trailing NUL already.
 439          */
 440         if (copy_from_user(kbuf, buf, min_t(unsigned long, BUFLEN - 1, count)))
 441                 GOTO(out, rc = -EFAULT);
 442         tmpbuf = skip_spaces(kbuf);
 443         tmpbuf = strsep(&tmpbuf, " \t\n\f\v\r");
 444
 445         if (strncmp(tmpbuf, "nid:", 4) != 0) {
 446                 count = lprocfs_evict_client_seq_write(file, buf, count, off);
 447                 goto out;
 448         }
 449
 450         if (mdt->mdt_opts.mo_evict_tgt_nids) {
 451                 rc = obd_set_info_async(NULL, mdt->mdt_child_exp,
 452                                         sizeof(KEY_EVICT_BY_NID),
 453                                         KEY_EVICT_BY_NID,
 454                                         strlen(tmpbuf + 4) + 1,
 455                                         tmpbuf + 4, NULL);
 456                 if (rc)
 457                         CERROR("Failed to evict nid %s from OSTs: rc %d\n",
 458                                tmpbuf + 4, rc);
 459         }
 460
 461         /* See the comments in function lprocfs_wr_evict_client()
 462          * in ptlrpc/lproc_ptlrpc.c for details. - jay */
 463         class_incref(obd, __func__, current);
 464         obd_export_evict_by_nid(obd, tmpbuf + 4);
 465         class_decref(obd, __func__, current);
 466
 467
 468 out:
 469         OBD_FREE(kbuf, BUFLEN);
 470         return rc < 0 ? rc : count;
 471 }
 472
 473 #undef BUFLEN
 474
 475 static ssize_t evict_tgt_nids_show(struct kobject *kobj,
 476                                    struct attribute *attr, char *buf)
 477 {
 478         struct obd_device *obd = container_of(kobj, struct obd_device,
 479                                               obd_kset.kobj);
 480         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 481
 482         return scnprintf(buf, PAGE_SIZE, "%u\n",
 483                          mdt->mdt_opts.mo_evict_tgt_nids);
 484 }
 485
 486 static ssize_t evict_tgt_nids_store(struct kobject *kobj,
 487                                     struct attribute *attr, const char *buffer,
 488                                     size_t count)
 489 {
 490         struct obd_device *obd = container_of(kobj, struct obd_device,
 491                                               obd_kset.kobj);
 492         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 493         bool val;
 494         int rc;
 495
 496         rc = kstrtobool(buffer, &val);
 497         if (rc)
 498                 return rc;
 499
 500         mdt->mdt_opts.mo_evict_tgt_nids = val;
 501         return count;
 502 }
 503 LUSTRE_RW_ATTR(evict_tgt_nids);
 504
 505 static ssize_t commit_on_sharing_show(struct kobject *kobj,
 506                                       struct attribute *attr, char *buf)
 507 {
 508         struct obd_device *obd = container_of(kobj, struct obd_device,
 509                                               obd_kset.kobj);
 510         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 511
 512         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt_cos_is_enabled(mdt));
 513 }
 514
 515 static ssize_t commit_on_sharing_store(struct kobject *kobj,
 516                                        struct attribute *attr,
 517                                        const char *buffer, size_t count)
 518 {
 519         struct obd_device *obd = container_of(kobj, struct obd_device,
 520                                               obd_kset.kobj);
 521         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 522         bool val;
 523         int rc;
 524
 525         rc = kstrtobool(buffer, &val);
 526         if (rc)
 527                 return rc;
 528
 529         mdt_enable_cos(mdt, val);
 530         return count;
 531 }
 532 LUSTRE_RW_ATTR(commit_on_sharing);
 533
 534 static ssize_t local_recovery_show(struct kobject *kobj,
 535                                       struct attribute *attr, char *buf)
 536 {
 537         struct obd_device *obd = container_of(kobj, struct obd_device,
 538                                               obd_kset.kobj);
 539
 540         return scnprintf(buf, PAGE_SIZE, "%u\n",
 541                          obd->u.obt.obt_lut->lut_local_recovery);
 542 }
 543
 544 static ssize_t local_recovery_store(struct kobject *kobj,
 545                                        struct attribute *attr,
 546                                        const char *buffer, size_t count)
 547 {
 548         struct obd_device *obd = container_of(kobj, struct obd_device,
 549                                               obd_kset.kobj);
 550         bool val;
 551         int rc;
 552
 553         rc = kstrtobool(buffer, &val);
 554         if (rc)
 555                 return rc;
 556
 557         obd->u.obt.obt_lut->lut_local_recovery = !!val;
 558         return count;
 559 }
 560 LUSTRE_RW_ATTR(local_recovery);
 561
 562 static int mdt_root_squash_seq_show(struct seq_file *m, void *data)
 563 {
 564         struct obd_device *obd = m->private;
 565         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 566         struct root_squash_info *squash = &mdt->mdt_squash;
 567
 568         seq_printf(m, "%u:%u\n", squash->rsi_uid,
 569                    squash->rsi_gid);
 570         return 0;
 571 }
 572
 573 static ssize_t
 574 mdt_root_squash_seq_write(struct file *file, const char __user *buffer,
 575                           size_t count, loff_t *off)
 576 {
 577         struct seq_file   *m = file->private_data;
 578         struct obd_device *obd = m->private;
 579         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 580         struct root_squash_info *squash = &mdt->mdt_squash;
 581
 582         return lprocfs_wr_root_squash(buffer, count, squash,
 583                                       mdt_obd_name(mdt));
 584 }
 585 LPROC_SEQ_FOPS(mdt_root_squash);
 586
 587 static int mdt_nosquash_nids_seq_show(struct seq_file *m, void *data)
 588 {
 589         struct obd_device *obd = m->private;
 590         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 591         struct root_squash_info *squash = &mdt->mdt_squash;
 592         int len = 0;
 593
 594         spin_lock(&squash->rsi_lock);
 595         if (!list_empty(&squash->rsi_nosquash_nids)) {
 596                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
 597                                         &squash->rsi_nosquash_nids);
 598                 m->count += len;
 599                 seq_putc(m, '\n');
 600         } else
 601                 seq_puts(m, "NONE\n");
 602         spin_unlock(&squash->rsi_lock);
 603
 604         return 0;
 605 }
 606
 607 static ssize_t
 608 mdt_nosquash_nids_seq_write(struct file *file, const char __user *buffer,
 609                             size_t count, loff_t *off)
 610 {
 611         struct seq_file   *m = file->private_data;
 612         struct obd_device *obd = m->private;
 613         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 614         struct root_squash_info *squash = &mdt->mdt_squash;
 615
 616         return lprocfs_wr_nosquash_nids(buffer, count, squash,
 617                                         mdt_obd_name(mdt));
 618 }
 619 LPROC_SEQ_FOPS(mdt_nosquash_nids);
 620
 621 static ssize_t enable_remote_dir_show(struct kobject *kobj,
 622                                       struct attribute *attr, char *buf)
 623 {
 624         struct obd_device *obd = container_of(kobj, struct obd_device,
 625                                               obd_kset.kobj);
 626         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 627
 628         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_enable_remote_dir);
 629 }
 630
 631 static ssize_t enable_remote_dir_store(struct kobject *kobj,
 632                                        struct attribute *attr,
 633                                        const char *buffer, size_t count)
 634 {
 635         struct obd_device *obd = container_of(kobj, struct obd_device,
 636                                               obd_kset.kobj);
 637         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 638         bool val;
 639         int rc;
 640
 641         rc = kstrtobool(buffer, &val);
 642         if (rc)
 643                 return rc;
 644
 645         mdt->mdt_enable_remote_dir = val;
 646         return count;
 647 }
 648 LUSTRE_RW_ATTR(enable_remote_dir);
 649
 650 static ssize_t enable_remote_dir_gid_show(struct kobject *kobj,
 651                                           struct attribute *attr, char *buf)
 652 {
 653         struct obd_device *obd = container_of(kobj, struct obd_device,
 654                                               obd_kset.kobj);
 655         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 656
 657         return scnprintf(buf, PAGE_SIZE, "%d\n",
 658                          (int)mdt->mdt_enable_remote_dir_gid);
 659 }
 660
 661 static ssize_t enable_remote_dir_gid_store(struct kobject *kobj,
 662                                            struct attribute *attr,
 663                                            const char *buffer, size_t count)
 664 {
 665         struct obd_device *obd = container_of(kobj, struct obd_device,
 666                                               obd_kset.kobj);
 667         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 668         int val;
 669         int rc;
 670
 671         rc = kstrtoint(buffer, 0, &val);
 672         if (rc)
 673                 return rc;
 674
 675         mdt->mdt_enable_remote_dir_gid = val;
 676         return count;
 677 }
 678 LUSTRE_RW_ATTR(enable_remote_dir_gid);
 679
 680 static ssize_t enable_chprojid_gid_show(struct kobject *kobj,
 681                                         struct attribute *attr, char *buf)
 682 {
 683         struct obd_device *obd = container_of(kobj, struct obd_device,
 684                                               obd_kset.kobj);
 685         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 686
 687         return scnprintf(buf, PAGE_SIZE, "%d\n",
 688                          (int)mdt->mdt_enable_chprojid_gid);
 689 }
 690
 691 static ssize_t enable_chprojid_gid_store(struct kobject *kobj,
 692                                          struct attribute *attr,
 693                                          const char *buffer, size_t count)
 694 {
 695         struct obd_device *obd = container_of(kobj, struct obd_device,
 696                                               obd_kset.kobj);
 697         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 698         int val;
 699         int rc;
 700
 701         rc = kstrtoint(buffer, 0, &val);
 702         if (rc)
 703                 return rc;
 704
 705         mdt->mdt_enable_chprojid_gid = val;
 706         return count;
 707 }
 708 LUSTRE_RW_ATTR(enable_chprojid_gid);
 709
 710 static ssize_t enable_striped_dir_show(struct kobject *kobj,
 711                                        struct attribute *attr, char *buf)
 712 {
 713         struct obd_device *obd = container_of(kobj, struct obd_device,
 714                                               obd_kset.kobj);
 715         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 716
 717         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_enable_striped_dir);
 718 }
 719
 720 static ssize_t enable_striped_dir_store(struct kobject *kobj,
 721                                         struct attribute *attr,
 722                                         const char *buffer, size_t count)
 723 {
 724         struct obd_device *obd = container_of(kobj, struct obd_device,
 725                                               obd_kset.kobj);
 726         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 727         bool val;
 728         int rc;
 729
 730         rc = kstrtobool(buffer, &val);
 731         if (rc)
 732                 return rc;
 733
 734         mdt->mdt_enable_striped_dir = val;
 735         return count;
 736 }
 737 LUSTRE_RW_ATTR(enable_striped_dir);
 738
 739 static ssize_t enable_dir_migration_show(struct kobject *kobj,
 740                                          struct attribute *attr, char *buf)
 741 {
 742         struct obd_device *obd = container_of(kobj, struct obd_device,
 743                                               obd_kset.kobj);
 744         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 745
 746         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_enable_dir_migration);
 747 }
 748
 749 static ssize_t enable_dir_migration_store(struct kobject *kobj,
 750                                           struct attribute *attr,
 751                                           const char *buffer, size_t count)
 752 {
 753         struct obd_device *obd = container_of(kobj, struct obd_device,
 754                                               obd_kset.kobj);
 755         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 756         bool val;
 757         int rc;
 758
 759         rc = kstrtobool(buffer, &val);
 760         if (rc)
 761                 return rc;
 762
 763         mdt->mdt_enable_dir_migration = val;
 764         return count;
 765 }
 766 LUSTRE_RW_ATTR(enable_dir_migration);
 767
 768 static ssize_t enable_dir_restripe_show(struct kobject *kobj,
 769                                         struct attribute *attr, char *buf)
 770 {
 771         struct obd_device *obd = container_of(kobj, struct obd_device,
 772                                               obd_kset.kobj);
 773         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 774
 775         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_enable_dir_restripe);
 776 }
 777
 778 static ssize_t enable_dir_restripe_store(struct kobject *kobj,
 779                                          struct attribute *attr,
 780                                          const char *buffer, size_t count)
 781 {
 782         struct obd_device *obd = container_of(kobj, struct obd_device,
 783                                               obd_kset.kobj);
 784         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 785         bool val;
 786         int rc;
 787
 788         rc = kstrtobool(buffer, &val);
 789         if (rc)
 790                 return rc;
 791
 792         mdt->mdt_enable_dir_restripe = val;
 793         return count;
 794 }
 795 LUSTRE_RW_ATTR(enable_dir_restripe);
 796
 797 static ssize_t enable_dir_auto_split_show(struct kobject *kobj,
 798                                           struct attribute *attr, char *buf)
 799 {
 800         struct obd_device *obd = container_of(kobj, struct obd_device,
 801                                               obd_kset.kobj);
 802         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 803
 804         return scnprintf(buf, PAGE_SIZE, "%u\n",
 805                          mdt->mdt_enable_dir_auto_split);
 806 }
 807
 808 static ssize_t enable_dir_auto_split_store(struct kobject *kobj,
 809                                            struct attribute *attr,
 810                                            const char *buffer, size_t count)
 811 {
 812         struct obd_device *obd = container_of(kobj, struct obd_device,
 813                                               obd_kset.kobj);
 814         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 815         bool val;
 816         int rc;
 817
 818         rc = kstrtobool(buffer, &val);
 819         if (rc)
 820                 return rc;
 821
 822         mdt->mdt_enable_dir_auto_split = val;
 823         return count;
 824 }
 825 LUSTRE_RW_ATTR(enable_dir_auto_split);
 826
 827 /**
 828  * Show MDT async commit count.
 829  *
 830  * @m           seq_file handle
 831  * @data        unused for single entry
 832  *
 833  * Return:      0 on success
 834  *              negative value on error
 835  */
 836 static ssize_t async_commit_count_show(struct kobject *kobj,
 837                                        struct attribute *attr, char *buf)
 838 {
 839         struct obd_device *obd = container_of(kobj, struct obd_device,
 840                                               obd_kset.kobj);
 841         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 842
 843         return scnprintf(buf, PAGE_SIZE, "%d\n",
 844                          atomic_read(&mdt->mdt_async_commit_count));
 845 }
 846
 847 static ssize_t async_commit_count_store(struct kobject *kobj,
 848                                         struct attribute *attr,
 849                                         const char *buffer, size_t count)
 850 {
 851         struct obd_device *obd = container_of(kobj, struct obd_device,
 852                                               obd_kset.kobj);
 853         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 854         int val;
 855         int rc;
 856
 857         rc = kstrtoint(buffer, 10, &val);
 858         if (rc)
 859                 return rc;
 860
 861         atomic_set(&mdt->mdt_async_commit_count, val);
 862
 863         return count;
 864 }
 865 LUSTRE_RW_ATTR(async_commit_count);
 866
 867 /**
 868  * Show MDT sync count.
 869  *
 870  * \param[in] m         seq_file handle
 871  * \param[in] data      unused for single entry
 872  *
 873  * \retval              0 on success
 874  * \retval              negative value on error
 875  */
 876 static ssize_t sync_count_show(struct kobject *kobj, struct attribute *attr,
 877                                char *buf)
 878 {
 879         struct obd_device *obd = container_of(kobj, struct obd_device,
 880                                               obd_kset.kobj);
 881         struct lu_target *tgt = obd->u.obt.obt_lut;
 882
 883         return scnprintf(buf, PAGE_SIZE, "%d\n",
 884                          atomic_read(&tgt->lut_sync_count));
 885 }
 886
 887 static ssize_t sync_count_store(struct kobject *kobj, struct attribute *attr,
 888                                 const char *buffer, size_t count)
 889 {
 890         struct obd_device *obd = container_of(kobj, struct obd_device,
 891                                               obd_kset.kobj);
 892         struct lu_target *tgt = obd->u.obt.obt_lut;
 893         int val;
 894         int rc;
 895
 896         rc = kstrtoint(buffer, 0, &val);
 897         if (rc)
 898                 return rc;
 899
 900         atomic_set(&tgt->lut_sync_count, val);
 901
 902         return count;
 903 }
 904 LUSTRE_RW_ATTR(sync_count);
 905
 906 static const char *dom_open_lock_modes[NUM_DOM_LOCK_ON_OPEN_MODES] = {
 907         [NO_DOM_LOCK_ON_OPEN] = "never",
 908         [TRYLOCK_DOM_ON_OPEN] = "trylock",
 909         [ALWAYS_DOM_LOCK_ON_OPEN] = "always",
 910 };
 911
 912 /* This must be longer than the longest string above */
 913 #define DOM_LOCK_MODES_MAXLEN 16
 914
 915 /**
 916  * Show MDT policy for data prefetch on open for DoM files..
 917  *
 918  * \param[in] m         seq_file handle
 919  * \param[in] data      unused
 920  *
 921  * \retval              0 on success
 922  * \retval              negative value on error
 923  */
 924 static ssize_t dom_lock_show(struct kobject *kobj, struct attribute *attr,
 925                              char *buf)
 926 {
 927         struct obd_device *obd = container_of(kobj, struct obd_device,
 928                                               obd_kset.kobj);
 929         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 930
 931         return scnprintf(buf, PAGE_SIZE, "%s\n",
 932                          dom_open_lock_modes[mdt->mdt_opts.mo_dom_lock]);
 933 }
 934
 935 /**
 936  * Change MDT policy for data prefetch on open for DoM files.
 937  *
 938  * This variable defines how DOM lock is taken at open enqueue.
 939  * There are three possible modes:
 940  * 1) never - never take DoM lock on open. DoM lock will be taken as separate
 941  *    IO lock with own enqueue.
 942  * 2) trylock - DoM lock will be taken only if non-blocked.
 943  * 3) always - DoM lock will be taken always even if it is blocking lock.
 944  *
 945  * If dom_read_open is enabled too then DoM lock is taken in PR mode and
 946  * is paired with LAYOUT lock when possible.
 947  *
 948  * \param[in] file      proc file
 949  * \param[in] buffer    string which represents policy
 950  * \param[in] count     \a buffer length
 951  * \param[in] off       unused for single entry
 952  *
 953  * \retval              \a count on success
 954  * \retval              negative number on error
 955  */
 956 static ssize_t dom_lock_store(struct kobject *kobj, struct attribute *attr,
 957                               const char *buffer, size_t count)
 958 {
 959         struct obd_device *obd = container_of(kobj, struct obd_device,
 960                                               obd_kset.kobj);
 961         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
 962         int val = -1;
 963         int i, rc;
 964
 965         if (count == 0 || count >= DOM_LOCK_MODES_MAXLEN)
 966                 return -EINVAL;
 967
 968         for (i = 0 ; i < NUM_DOM_LOCK_ON_OPEN_MODES; i++) {
 969                 /* buffer might have '\n' but using strlen() avoids it */
 970                 if (strncmp(buffer, dom_open_lock_modes[i],
 971                             strlen(dom_open_lock_modes[i])) == 0) {
 972                         val = i;
 973                         break;
 974                 }
 975         }
 976
 977         /* Legacy numeric codes */
 978         if (val == -1) {
 979                 rc = kstrtoint(buffer, 0, &val);
 980                 if (rc)
 981                         return rc;
 982         }
 983
 984         if (val == ALWAYS_DOM_LOCK_ON_OPEN)
 985                 val = TRYLOCK_DOM_ON_OPEN;
 986
 987         if (val < 0 || val >= NUM_DOM_LOCK_ON_OPEN_MODES)
 988                 return -EINVAL;
 989
 990         mdt->mdt_opts.mo_dom_lock = val;
 991         return count;
 992 }
 993 LUSTRE_RW_ATTR(dom_lock);
 994
 995 /**
 996  * Show MDT policy for data prefetch on open for DoM files..
 997  *
 998  * \param[in] m         seq_file handle
 999  * \param[in] data      unused
1000  *
1001  * \retval              0 on success
1002  * \retval              negative value on error
1003  */
1004 static ssize_t dom_read_open_show(struct kobject *kobj,
1005                                   struct attribute *attr, char *buf)
1006 {
1007         struct obd_device *obd = container_of(kobj, struct obd_device,
1008                                               obd_kset.kobj);
1009         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1010
1011         return scnprintf(buf, PAGE_SIZE, "%u\n",
1012                          !!mdt->mdt_opts.mo_dom_read_open);
1013 }
1014
1015 /**
1016  * Modify MDT policy for data prefetch on open for DoM files.
1017  *
1018  * If enabled then Data-on-MDT file data may be read during open and
1019  * returned back in reply. It works only with mo_dom_lock enabled.
1020  *
1021  * \param[in] file      proc file
1022  * \param[in] buffer    string which represents policy
1023  * \param[in] count     \a buffer length
1024  * \param[in] off       unused for single entry
1025  *
1026  * \retval              \a count on success
1027  * \retval              negative number on error
1028  */
1029 static ssize_t dom_read_open_store(struct kobject *kobj,
1030                                    struct attribute *attr, const char *buffer,
1031                                    size_t count)
1032 {
1033         struct obd_device *obd = container_of(kobj, struct obd_device,
1034                                               obd_kset.kobj);
1035         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1036         bool val;
1037         int rc;
1038
1039         rc = kstrtobool(buffer, &val);
1040         if (rc)
1041                 return rc;
1042
1043         mdt->mdt_opts.mo_dom_read_open = !!val;
1044         return count;
1045 }
1046 LUSTRE_RW_ATTR(dom_read_open);
1047
1048 static ssize_t migrate_hsm_allowed_show(struct kobject *kobj,
1049                                         struct attribute *attr, char *buf)
1050 {
1051         struct obd_device *obd = container_of(kobj, struct obd_device,
1052                                               obd_kset.kobj);
1053         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1054
1055         return scnprintf(buf, PAGE_SIZE, "%u\n",
1056                          mdt->mdt_opts.mo_migrate_hsm_allowed);
1057 }
1058
1059 static ssize_t migrate_hsm_allowed_store(struct kobject *kobj,
1060                                          struct attribute *attr,
1061                                          const char *buffer, size_t count)
1062 {
1063         struct obd_device *obd = container_of(kobj, struct obd_device,
1064                                               obd_kset.kobj);
1065         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1066         bool val;
1067         int rc;
1068
1069         rc = kstrtobool(buffer, &val);
1070         if (rc)
1071                 return rc;
1072
1073         mdt->mdt_opts.mo_migrate_hsm_allowed = val;
1074         return count;
1075 }
1076 LUSTRE_RW_ATTR(migrate_hsm_allowed);
1077
1078 static ssize_t readonly_show(struct kobject *kobj, struct attribute *attr,
1079                              char *buf)
1080 {
1081         struct obd_device *obd = container_of(kobj, struct obd_device,
1082                                               obd_kset.kobj);
1083         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1084
1085         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_readonly);
1086 }
1087
1088 static ssize_t readonly_store(struct kobject *kobj, struct attribute *attr,
1089                               const char *buffer, size_t count)
1090 {
1091         struct obd_device *obd = container_of(kobj, struct obd_device,
1092                                               obd_kset.kobj);
1093         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1094         bool val;
1095         int rc;
1096
1097         rc = kstrtobool(buffer, &val);
1098         if (rc)
1099                 return rc;
1100
1101         mdt->mdt_readonly = val;
1102         return count;
1103 }
1104 LUSTRE_RW_ATTR(readonly);
1105
1106 static ssize_t enable_remote_rename_show(struct kobject *kobj,
1107                                          struct attribute *attr,
1108                                          char *buf)
1109 {
1110         struct obd_device *obd = container_of(kobj, struct obd_device,
1111                                               obd_kset.kobj);
1112         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1113
1114         return scnprintf(buf, PAGE_SIZE, "%u\n",
1115                          mdt->mdt_enable_remote_rename);
1116 }
1117
1118 static ssize_t enable_remote_rename_store(struct kobject *kobj,
1119                                           struct attribute *attr,
1120                                           const char *buffer, size_t count)
1121 {
1122         struct obd_device *obd = container_of(kobj, struct obd_device,
1123                                               obd_kset.kobj);
1124         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1125         bool val;
1126         int rc;
1127
1128         rc = kstrtobool(buffer, &val);
1129         if (rc)
1130                 return rc;
1131
1132         mdt->mdt_enable_remote_rename = val;
1133         return count;
1134 }
1135 LUSTRE_RW_ATTR(enable_remote_rename);
1136
1137 static ssize_t dir_split_count_show(struct kobject *kobj,
1138                                      struct attribute *attr,
1139                                      char *buf)
1140 {
1141         struct obd_device *obd = container_of(kobj, struct obd_device,
1142                                               obd_kset.kobj);
1143         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1144
1145         return scnprintf(buf, PAGE_SIZE, "%llu\n",
1146                          mdt->mdt_restriper.mdr_dir_split_count);
1147 }
1148
1149 static ssize_t dir_split_count_store(struct kobject *kobj,
1150                                       struct attribute *attr,
1151                                       const char *buffer, size_t count)
1152 {
1153         struct obd_device *obd = container_of(kobj, struct obd_device,
1154                                               obd_kset.kobj);
1155         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1156         s64 val;
1157         int rc;
1158
1159         rc = sysfs_memparse(buffer, count, &val, "B");
1160         if (rc < 0)
1161                 return rc;
1162
1163         if (val < 0)
1164                 return -ERANGE;
1165
1166         mdt->mdt_restriper.mdr_dir_split_count = val;
1167
1168         return count;
1169 }
1170 LUSTRE_RW_ATTR(dir_split_count);
1171
1172 static ssize_t dir_split_delta_show(struct kobject *kobj,
1173                                     struct attribute *attr,
1174                                     char *buf)
1175 {
1176         struct obd_device *obd = container_of(kobj, struct obd_device,
1177                                               obd_kset.kobj);
1178         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1179
1180         return scnprintf(buf, PAGE_SIZE, "%u\n",
1181                          mdt->mdt_restriper.mdr_dir_split_delta);
1182 }
1183
1184 static ssize_t dir_split_delta_store(struct kobject *kobj,
1185                                      struct attribute *attr,
1186                                      const char *buffer, size_t count)
1187 {
1188         struct obd_device *obd = container_of(kobj, struct obd_device,
1189                                               obd_kset.kobj);
1190         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1191         u32 val;
1192         int rc;
1193
1194         rc = kstrtouint(buffer, 0, &val);
1195         if (rc)
1196                 return rc;
1197
1198         mdt->mdt_restriper.mdr_dir_split_delta = val;
1199
1200         return count;
1201 }
1202 LUSTRE_RW_ATTR(dir_split_delta);
1203
1204 static ssize_t dir_restripe_nsonly_show(struct kobject *kobj,
1205                                         struct attribute *attr, char *buf)
1206 {
1207         struct obd_device *obd = container_of(kobj, struct obd_device,
1208                                               obd_kset.kobj);
1209         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1210
1211         return scnprintf(buf, PAGE_SIZE, "%u\n", mdt->mdt_dir_restripe_nsonly);
1212 }
1213
1214 static ssize_t dir_restripe_nsonly_store(struct kobject *kobj,
1215                                          struct attribute *attr,
1216                                          const char *buffer, size_t count)
1217 {
1218         struct obd_device *obd = container_of(kobj, struct obd_device,
1219                                               obd_kset.kobj);
1220         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1221         bool val;
1222         int rc;
1223
1224         rc = kstrtobool(buffer, &val);
1225         if (rc)
1226                 return rc;
1227
1228         mdt->mdt_dir_restripe_nsonly = val;
1229         return count;
1230 }
1231 LUSTRE_RW_ATTR(dir_restripe_nsonly);
1232
1233 static ssize_t enable_remote_subdir_mount_show(struct kobject *kobj,
1234                                                struct attribute *attr,
1235                                                char *buf)
1236 {
1237         struct obd_device *obd = container_of(kobj, struct obd_device,
1238                                               obd_kset.kobj);
1239         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1240
1241         return scnprintf(buf, PAGE_SIZE, "%u\n",
1242                          mdt->mdt_enable_remote_subdir_mount);
1243 }
1244
1245 static ssize_t enable_remote_subdir_mount_store(struct kobject *kobj,
1246                                                 struct attribute *attr,
1247                                                 const char *buffer,
1248                                                 size_t count)
1249 {
1250         struct obd_device *obd = container_of(kobj, struct obd_device,
1251                                               obd_kset.kobj);
1252         struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
1253         bool val;
1254         int rc;
1255
1256         rc = kstrtobool(buffer, &val);
1257         if (rc)
1258                 return rc;
1259
1260         mdt->mdt_enable_remote_subdir_mount = val;
1261         return count;
1262 }
1263 LUSTRE_RW_ATTR(enable_remote_subdir_mount);
1264
1265 /**
1266  * Show if the OFD enforces T10PI checksum.
1267  *
1268  * \param[in] m         seq_file handle
1269  * \param[in] data      unused for single entry
1270  *
1271  * \retval              0 on success
1272  * \retval              negative value on error
1273  */
1274 static ssize_t checksum_t10pi_enforce_show(struct kobject *kobj,
1275                                            struct attribute *attr,
1276                                            char *buf)
1277 {
1278         struct obd_device *obd = container_of(kobj, struct obd_device,
1279                                               obd_kset.kobj);
1280         struct lu_target *lut = obd->u.obt.obt_lut;
1281
1282         return scnprintf(buf, PAGE_SIZE, "%u\n", lut->lut_cksum_t10pi_enforce);
1283 }
1284
1285 /**
1286  * Force specific T10PI checksum modes to be enabled
1287  *
1288  * If T10PI *is* supported in hardware, allow only the supported T10PI type
1289  * to be used. If T10PI is *not* supported by the OSD, setting the enforce
1290  * parameter forces all T10PI types to be enabled (even if slower) for
1291  * testing.
1292  *
1293  * The final determination of which algorithm to be used depends whether
1294  * the client supports T10PI or not, and is handled at client connect time.
1295  *
1296  * \param[in] file      proc file
1297  * \param[in] buffer    string which represents mode
1298  *                      1: set T10PI checksums enforced
1299  *                      0: unset T10PI checksums enforced
1300  * \param[in] count     \a buffer length
1301  * \param[in] off       unused for single entry
1302  *
1303  * \retval              \a count on success
1304  * \retval              negative number on error
1305  */
1306 static ssize_t checksum_t10pi_enforce_store(struct kobject *kobj,
1307                                             struct attribute *attr,
1308                                             const char *buffer, size_t count)
1309 {
1310         struct obd_device *obd = container_of(kobj, struct obd_device,
1311                                               obd_kset.kobj);
1312         struct lu_target *lut = obd->u.obt.obt_lut;
1313         bool enforce;
1314         int rc;
1315
1316         rc = kstrtobool(buffer, &enforce);
1317         if (rc)
1318                 return rc;
1319
1320         spin_lock(&lut->lut_flags_lock);
1321         lut->lut_cksum_t10pi_enforce = enforce;
1322         spin_unlock(&lut->lut_flags_lock);
1323         return count;
1324 }
1325 LUSTRE_RW_ATTR(checksum_t10pi_enforce);
1326
1327 LPROC_SEQ_FOPS_RO_TYPE(mdt, hash);
1328 LPROC_SEQ_FOPS_WR_ONLY(mdt, mds_evict_client);
1329 LPROC_SEQ_FOPS_RW_TYPE(mdt, checksum_dump);
1330 LUSTRE_RW_ATTR(job_cleanup_interval);
1331 LPROC_SEQ_FOPS_RW_TYPE(mdt, nid_stats_clear);
1332 LUSTRE_RW_ATTR(hsm_control);
1333
1334 LPROC_SEQ_FOPS_RO_TYPE(mdt, recovery_status);
1335 LUSTRE_RW_ATTR(recovery_time_hard);
1336 LUSTRE_RW_ATTR(recovery_time_soft);
1337 LUSTRE_RW_ATTR(ir_factor);
1338
1339 LUSTRE_RO_ATTR(tot_dirty);
1340 LUSTRE_RO_ATTR(tot_granted);
1341 LUSTRE_RO_ATTR(tot_pending);
1342 LUSTRE_RW_ATTR(grant_compat_disable);
1343 LUSTRE_RO_ATTR(instance);
1344
1345 LUSTRE_RO_ATTR(num_exports);
1346
1347 static struct attribute *mdt_attrs[] = {
1348         &lustre_attr_tot_dirty.attr,
1349         &lustre_attr_tot_granted.attr,
1350         &lustre_attr_tot_pending.attr,
1351         &lustre_attr_grant_compat_disable.attr,
1352         &lustre_attr_instance.attr,
1353         &lustre_attr_recovery_time_hard.attr,
1354         &lustre_attr_recovery_time_soft.attr,
1355         &lustre_attr_ir_factor.attr,
1356         &lustre_attr_num_exports.attr,
1357         &lustre_attr_identity_expire.attr,
1358         &lustre_attr_identity_acquire_expire.attr,
1359         &lustre_attr_identity_upcall.attr,
1360         &lustre_attr_identity_flush.attr,
1361         &lustre_attr_evict_tgt_nids.attr,
1362         &lustre_attr_enable_remote_dir.attr,
1363         &lustre_attr_enable_remote_dir_gid.attr,
1364         &lustre_attr_enable_chprojid_gid.attr,
1365         &lustre_attr_enable_striped_dir.attr,
1366         &lustre_attr_enable_dir_migration.attr,
1367         &lustre_attr_enable_dir_restripe.attr,
1368         &lustre_attr_enable_dir_auto_split.attr,
1369         &lustre_attr_enable_remote_rename.attr,
1370         &lustre_attr_commit_on_sharing.attr,
1371         &lustre_attr_local_recovery.attr,
1372         &lustre_attr_async_commit_count.attr,
1373         &lustre_attr_sync_count.attr,
1374         &lustre_attr_dom_lock.attr,
1375         &lustre_attr_dom_read_open.attr,
1376         &lustre_attr_migrate_hsm_allowed.attr,
1377         &lustre_attr_hsm_control.attr,
1378         &lustre_attr_job_cleanup_interval.attr,
1379         &lustre_attr_readonly.attr,
1380         &lustre_attr_dir_split_count.attr,
1381         &lustre_attr_dir_split_delta.attr,
1382         &lustre_attr_dir_restripe_nsonly.attr,
1383         &lustre_attr_checksum_t10pi_enforce.attr,
1384         &lustre_attr_enable_remote_subdir_mount.attr,
1385         NULL,
1386 };
1387
1388 static struct lprocfs_vars lprocfs_mdt_obd_vars[] = {
1389         { .name =       "recovery_status",
1390           .fops =       &mdt_recovery_status_fops               },
1391         { .name =       "identity_info",
1392           .fops =       &mdt_identity_info_fops                 },
1393         { .name =       "site_stats",
1394           .fops =       &mdt_site_stats_fops                    },
1395         { .name =       "evict_client",
1396           .fops =       &mdt_mds_evict_client_fops              },
1397         { .name =       "checksum_dump",
1398           .fops =       &mdt_checksum_dump_fops                 },
1399         { .name =       "hash_stats",
1400           .fops =       &mdt_hash_fops                          },
1401         { .name =       "root_squash",
1402           .fops =       &mdt_root_squash_fops                   },
1403         { .name =       "nosquash_nids",
1404           .fops =       &mdt_nosquash_nids_fops                 },
1405         { NULL }
1406 };
1407
1408 static int
1409 lprocfs_mdt_print_open_files(struct obd_export *exp, void *v)
1410 {
1411         struct seq_file         *seq = v;
1412
1413         if (exp->exp_lock_hash != NULL) {
1414                 struct mdt_export_data  *med = &exp->exp_mdt_data;
1415                 struct mdt_file_data    *mfd;
1416
1417                 spin_lock(&med->med_open_lock);
1418                 list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
1419                         seq_printf(seq, DFID"\n",
1420                                    PFID(mdt_object_fid(mfd->mfd_object)));
1421                 }
1422                 spin_unlock(&med->med_open_lock);
1423         }
1424
1425         return 0;
1426 }
1427
1428 static int lprocfs_mdt_open_files_seq_show(struct seq_file *seq, void *v)
1429 {
1430         struct nid_stat *stats = seq->private;
1431
1432         return obd_nid_export_for_each(stats->nid_obd, stats->nid,
1433                                        lprocfs_mdt_print_open_files, seq);
1434 }
1435
1436 int lprocfs_mdt_open_files_seq_open(struct inode *inode, struct file *file)
1437 {
1438         struct seq_file         *seq;
1439         int                     rc;
1440
1441         rc = single_open(file, &lprocfs_mdt_open_files_seq_show, NULL);
1442         if (rc != 0)
1443                 return rc;
1444
1445         seq = file->private_data;
1446         seq->private = PDE_DATA(inode);
1447
1448         return 0;
1449 }
1450
1451 void mdt_counter_incr(struct ptlrpc_request *req, int opcode, long amount)
1452 {
1453         struct obd_export *exp = req->rq_export;
1454
1455         if (exp->exp_obd && exp->exp_obd->obd_md_stats)
1456                 lprocfs_counter_add(exp->exp_obd->obd_md_stats,
1457                                     opcode + LPROC_MD_LAST_OPC, amount);
1458         if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
1459                 lprocfs_counter_add(exp->exp_nid_stats->nid_stats, opcode,
1460                                     amount);
1461         if (exp->exp_obd && exp->exp_obd->u.obt.obt_jobstats.ojs_hash &&
1462             (exp_connect_flags(exp) & OBD_CONNECT_JOBSTATS))
1463                 lprocfs_job_stats_log(exp->exp_obd,
1464                                       lustre_msg_get_jobid(req->rq_reqmsg),
1465                                       opcode, amount);
1466 }
1467
1468 static const char * const mdt_stats[] = {
1469         [LPROC_MDT_OPEN]                = "open",
1470         [LPROC_MDT_CLOSE]               = "close",
1471         [LPROC_MDT_MKNOD]               = "mknod",
1472         [LPROC_MDT_LINK]                = "link",
1473         [LPROC_MDT_UNLINK]              = "unlink",
1474         [LPROC_MDT_MKDIR]               = "mkdir",
1475         [LPROC_MDT_RMDIR]               = "rmdir",
1476         [LPROC_MDT_RENAME]              = "rename",
1477         [LPROC_MDT_GETATTR]             = "getattr",
1478         [LPROC_MDT_SETATTR]             = "setattr",
1479         [LPROC_MDT_GETXATTR]            = "getxattr",
1480         [LPROC_MDT_SETXATTR]            = "setxattr",
1481         [LPROC_MDT_STATFS]              = "statfs",
1482         [LPROC_MDT_SYNC]                = "sync",
1483         [LPROC_MDT_SAMEDIR_RENAME]      = "samedir_rename",
1484         [LPROC_MDT_CROSSDIR_RENAME]     = "crossdir_rename",
1485         [LPROC_MDT_IO_READ]             = "read_bytes",
1486         [LPROC_MDT_IO_WRITE]            = "write_bytes",
1487         [LPROC_MDT_IO_PUNCH]            = "punch",
1488         [LPROC_MDT_MIGRATE]             = "migrate",
1489         [LPROC_MDT_FALLOCATE]           = "fallocate",
1490 };
1491
1492 void mdt_stats_counter_init(struct lprocfs_stats *stats, unsigned int offset)
1493 {
1494         int array_size = ARRAY_SIZE(mdt_stats);
1495         int oidx; /* obd_md_stats index */
1496         int midx; /* mdt_stats index */
1497
1498         LASSERT(stats && stats->ls_num >= offset + array_size);
1499
1500         for (midx = 0; midx < array_size; midx++) {
1501                 oidx = midx + offset;
1502                 if (midx == LPROC_MDT_IO_READ || midx == LPROC_MDT_IO_WRITE)
1503                         lprocfs_counter_init(stats, oidx,
1504                                              LPROCFS_TYPE_BYTES_FULL,
1505                                              mdt_stats[midx], "bytes");
1506                 else
1507                         lprocfs_counter_init(stats, oidx,
1508                                              LPROCFS_TYPE_LATENCY,
1509                                              mdt_stats[midx], "usecs");
1510         }
1511 }
1512
1513 int mdt_tunables_init(struct mdt_device *mdt, const char *name)
1514 {
1515         struct obd_device *obd = mdt2obd_dev(mdt);
1516         int rc;
1517
1518         ENTRY;
1519         LASSERT(name != NULL);
1520
1521         obd->obd_ktype.default_attrs = mdt_attrs;
1522         obd->obd_vars = lprocfs_mdt_obd_vars;
1523         rc = lprocfs_obd_setup(obd, true);
1524         if (rc) {
1525                 CERROR("%s: cannot create proc entries: rc = %d\n",
1526                        mdt_obd_name(mdt), rc);
1527                 return rc;
1528         }
1529
1530         rc = tgt_tunables_init(&mdt->mdt_lut);
1531         if (rc) {
1532                 CERROR("%s: failed to init target tunables: rc = %d\n",
1533                        mdt_obd_name(mdt), rc);
1534                 return rc;
1535         }
1536
1537         rc = hsm_cdt_tunables_init(mdt);
1538         if (rc) {
1539                 CERROR("%s: cannot create hsm proc entries: rc = %d\n",
1540                        mdt_obd_name(mdt), rc);
1541                 return rc;
1542         }
1543
1544         obd->obd_proc_exports_entry = proc_mkdir("exports",
1545                                                  obd->obd_proc_entry);
1546         if (obd->obd_proc_exports_entry)
1547                 lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
1548                                    obd, &mdt_nid_stats_clear_fops);
1549
1550         rc = lprocfs_alloc_md_stats(obd, ARRAY_SIZE(mdt_stats));
1551         if (rc)
1552                 return rc;
1553
1554         /* add additional MDT md_stats after the default ones */
1555         mdt_stats_counter_init(obd->obd_md_stats, LPROC_MD_LAST_OPC);
1556         rc = lprocfs_job_stats_init(obd, ARRAY_SIZE(mdt_stats),
1557                                     mdt_stats_counter_init);
1558
1559         rc = lproc_mdt_attach_rename_seqstat(mdt);
1560         if (rc)
1561                 CERROR("%s: MDT can not create rename stats rc = %d\n",
1562                        mdt_obd_name(mdt), rc);
1563
1564         RETURN(rc);
1565 }
1566
1567 void mdt_tunables_fini(struct mdt_device *mdt)
1568 {
1569         struct obd_device *obd = mdt2obd_dev(mdt);
1570
1571         if (obd->obd_proc_exports_entry != NULL) {
1572                 lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
1573                 obd->obd_proc_exports_entry = NULL;
1574         }
1575
1576         lprocfs_free_per_client_stats(obd);
1577         /* hsm_cdt_tunables is disabled earlier than this to avoid
1578          * coordinator restart.
1579          */
1580         hsm_cdt_tunables_fini(mdt);
1581         tgt_tunables_fini(&mdt->mdt_lut);
1582         lprocfs_obd_cleanup(obd);
1583         lprocfs_free_md_stats(obd);
1584         lprocfs_free_obd_stats(obd);
1585         lprocfs_job_stats_fini(obd);
1586 }