lustre/ptlrpc/nodemap_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) 2013, Trustees of Indiana University
  24  *
  25  * Copyright (c) 2014, 2017, Intel Corporation.
  26  *
  27  * Author: Joshua Walgenbach <jjw@iu.edu>
  28  */
  29
  30 #define NODEMAP_LPROC_ID_LEN 16
  31 #define NODEMAP_LPROC_FLAG_LEN 2
  32
  33 #include <lprocfs_status.h>
  34 #include <lustre_net.h>
  35 #include <lustre_export.h>
  36 #include <obd_class.h>
  37 #include <interval_tree.h>
  38 #include "nodemap_internal.h"
  39
  40 static LIST_HEAD(nodemap_pde_list);
  41
  42 /**
  43  * Reads and prints the idmap for the given nodemap.
  44  *
  45  * \param       m               seq file in proc fs
  46  * \param       data            unused
  47  * \retval      0               success
  48  */
  49 static int nodemap_idmap_show(struct seq_file *m, void *data)
  50 {
  51         struct lu_nodemap       *nodemap;
  52         struct lu_idmap         *idmap;
  53         struct rb_node          *node;
  54         bool                    cont = 0;
  55         int rc;
  56
  57         mutex_lock(&active_config_lock);
  58         nodemap = nodemap_lookup(m->private);
  59         mutex_unlock(&active_config_lock);
  60         if (IS_ERR(nodemap)) {
  61                 rc = PTR_ERR(nodemap);
  62                 CERROR("cannot find nodemap '%s': rc = %d\n",
  63                         (char *)m->private, rc);
  64                 return rc;
  65         }
  66
  67         seq_printf(m, "[\n");
  68         down_read(&nodemap->nm_idmap_lock);
  69         for (node = rb_first(&nodemap->nm_client_to_fs_uidmap); node;
  70                                 node = rb_next(node)) {
  71                 if (cont)
  72                         seq_printf(m, ",\n");
  73                 cont = 1;
  74                 idmap = rb_entry(node, struct lu_idmap, id_client_to_fs);
  75                 if (idmap != NULL)
  76                         seq_printf(m, " { idtype: uid, client_id: %u, "
  77                                    "fs_id: %u }", idmap->id_client,
  78                                    idmap->id_fs);
  79         }
  80         for (node = rb_first(&nodemap->nm_client_to_fs_gidmap);
  81                                 node; node = rb_next(node)) {
  82                 if (cont)
  83                         seq_printf(m, ",\n");
  84                 idmap = rb_entry(node, struct lu_idmap, id_client_to_fs);
  85                 if (idmap != NULL)
  86                         seq_printf(m, " { idtype: gid, client_id: %u, "
  87                                    "fs_id: %u }", idmap->id_client,
  88                                    idmap->id_fs);
  89         }
  90         up_read(&nodemap->nm_idmap_lock);
  91         seq_printf(m, "\n");
  92         seq_printf(m, "]\n");
  93
  94         nodemap_putref(nodemap);
  95         return 0;
  96 }
  97
  98 /**
  99  * Attaches nodemap_idmap_show to proc file.
 100  *
 101  * \param       inode           inode of seq file in proc fs
 102  * \param       file            seq file
 103  * \retval      0               success
 104  */
 105 static int nodemap_idmap_open(struct inode *inode, struct file *file)
 106 {
 107         return single_open(file, nodemap_idmap_show, PDE_DATA(inode));
 108 }
 109
 110 /**
 111  * Reads and prints the NID ranges for the given nodemap.
 112  *
 113  * \param       m               seq file in proc fs
 114  * \param       data            unused
 115  * \retval      0               success
 116  */
 117 static int nodemap_ranges_show(struct seq_file *m, void *data)
 118 {
 119         struct lu_nodemap               *nodemap;
 120         struct lu_nid_range             *range;
 121         struct interval_node_extent     ext;
 122         char                            start_nidstr[LNET_NIDSTR_SIZE];
 123         char                            end_nidstr[LNET_NIDSTR_SIZE];
 124         bool                            cont = false;
 125         int rc;
 126
 127         mutex_lock(&active_config_lock);
 128         nodemap = nodemap_lookup(m->private);
 129         if (IS_ERR(nodemap)) {
 130                 mutex_unlock(&active_config_lock);
 131                 rc = PTR_ERR(nodemap);
 132                 CERROR("cannot find nodemap '%s': rc = %d\n",
 133                         (char *)m->private, rc);
 134                 return rc;
 135         }
 136
 137         seq_printf(m, "[\n");
 138         down_read(&active_config->nmc_range_tree_lock);
 139         list_for_each_entry(range, &nodemap->nm_ranges, rn_list) {
 140                 if (cont)
 141                         seq_printf(m, ",\n");
 142                 cont = 1;
 143                 ext = range->rn_node.in_extent;
 144                 libcfs_nid2str_r(ext.start, start_nidstr, sizeof(start_nidstr));
 145                 libcfs_nid2str_r(ext.end, end_nidstr, sizeof(end_nidstr));
 146                 seq_printf(m, " { id: %u, start_nid: %s, end_nid: %s }",
 147                            range->rn_id, start_nidstr, end_nidstr);
 148         }
 149         up_read(&active_config->nmc_range_tree_lock);
 150         mutex_unlock(&active_config_lock);
 151         seq_printf(m, "\n");
 152         seq_printf(m, "]\n");
 153
 154         nodemap_putref(nodemap);
 155         return 0;
 156 }
 157
 158 /**
 159  * Connects nodemap_idmap_show to proc file.
 160  *
 161  * \param       inode           inode of seq file in proc fs
 162  * \param       file            seq file
 163  * \retval      0               success
 164  */
 165 static int nodemap_ranges_open(struct inode *inode, struct file *file)
 166 {
 167         return single_open(file, nodemap_ranges_show, PDE_DATA(inode));
 168 }
 169
 170 /**
 171  * Reads and prints the fileset for the given nodemap.
 172  *
 173  * \param       m               seq file in proc fs
 174  * \param       data            unused
 175  * \retval      0               success
 176  */
 177 static int nodemap_fileset_seq_show(struct seq_file *m, void *data)
 178 {
 179         struct lu_nodemap *nodemap;
 180         int rc = 0;
 181
 182         mutex_lock(&active_config_lock);
 183         nodemap = nodemap_lookup(m->private);
 184         mutex_unlock(&active_config_lock);
 185         if (IS_ERR(nodemap)) {
 186                 rc = PTR_ERR(nodemap);
 187                 CERROR("cannot find nodemap '%s': rc = %d\n",
 188                         (char *)m->private, rc);
 189                 return rc;
 190         }
 191
 192         seq_printf(m, "%s\n", nodemap->nm_fileset);
 193         nodemap_putref(nodemap);
 194         return rc;
 195 }
 196
 197 /**
 198  * Set a fileset on a nodemap.
 199  *
 200  * \param[in] file      proc file
 201  * \param[in] buffer    string, "<fileset>"
 202  * \param[in] count     \a buffer length
 203  * \param[in] off       unused
 204  * \retval              \a count on success
 205  * \retval              negative number on error
 206  */
 207 static ssize_t
 208 nodemap_fileset_seq_write(struct file *file,
 209                                       const char __user *buffer,
 210                                       size_t count, loff_t *off)
 211 {
 212         struct seq_file *m = file->private_data;
 213         char *nm_fileset;
 214         int rc = 0;
 215         ENTRY;
 216
 217         if (count == 0)
 218                 RETURN(0);
 219
 220         if (count > PATH_MAX)
 221                 RETURN(-EINVAL);
 222
 223         OBD_ALLOC(nm_fileset, count + 1);
 224         /* OBD_ALLOC zero-fills the buffer */
 225         if (nm_fileset == NULL)
 226                 RETURN(-ENOMEM);
 227
 228         if (copy_from_user(nm_fileset, buffer, count))
 229                 GOTO(out, rc = -EFAULT);
 230
 231         rc = nodemap_set_fileset(m->private, nm_fileset);
 232         if (rc != 0)
 233                 GOTO(out, rc = -EINVAL);
 234
 235         rc = count;
 236 out:
 237         OBD_FREE(nm_fileset, count + 1);
 238
 239         return rc;
 240 }
 241 LPROC_SEQ_FOPS(nodemap_fileset);
 242
 243 /**
 244  * Reads and prints the SELinux policy info for the given nodemap.
 245  *
 246  * \param       m               seq file in proc fs
 247  * \param       data            unused
 248  * \retval      0               success
 249  */
 250 static int nodemap_sepol_seq_show(struct seq_file *m, void *data)
 251 {
 252         struct lu_nodemap *nodemap;
 253         int rc = 0;
 254
 255         mutex_lock(&active_config_lock);
 256         nodemap = nodemap_lookup(m->private);
 257         mutex_unlock(&active_config_lock);
 258         if (IS_ERR(nodemap)) {
 259                 rc = PTR_ERR(nodemap);
 260                 CERROR("cannot find nodemap '%s': rc = %d\n",
 261                         (char *)m->private, rc);
 262                 return rc;
 263         }
 264
 265         seq_printf(m, "%s\n", nodemap_get_sepol(nodemap));
 266         nodemap_putref(nodemap);
 267         return rc;
 268 }
 269
 270 /**
 271  * Set SELinux policy info on a nodemap.
 272  *
 273  * \param[in] file      proc file
 274  * \param[in] buffer    string, "<sepol>"
 275  * \param[in] count     \a buffer length
 276  * \param[in] off       unused
 277  * \retval              \a count on success
 278  * \retval              negative number on error
 279  */
 280 static ssize_t
 281 nodemap_sepol_seq_write(struct file *file,
 282                         const char __user *buffer,
 283                         size_t count, loff_t *off)
 284 {
 285         struct seq_file *m = file->private_data;
 286         char sepol[LUSTRE_NODEMAP_SEPOL_LENGTH + 1];
 287         int rc = 0;
 288
 289         CLASSERT(sizeof(sepol) == sizeof(((struct lu_nodemap *)0)->nm_sepol));
 290
 291         if (count > 0) {
 292                 if (count >= sizeof(sepol))
 293                         GOTO(out, rc = -ENAMETOOLONG);
 294
 295                 if (copy_from_user(sepol, buffer, count))
 296                         GOTO(out, rc = -EFAULT);
 297
 298                 sepol[count] = '\0';
 299
 300                 rc = nodemap_set_sepol(m->private, sepol);
 301         }
 302
 303 out:
 304         if (rc != 0)
 305                 return rc;
 306
 307         return count;
 308 }
 309 LPROC_SEQ_FOPS(nodemap_sepol);
 310
 311 /**
 312  * Reads and prints the exports attached to the given nodemap.
 313  *
 314  * \param       m               seq file in proc fs, stores nodemap
 315  * \param       data            unused
 316  * \retval      0               success
 317  */
 318 static int nodemap_exports_show(struct seq_file *m, void *data)
 319 {
 320         struct lu_nodemap *nodemap;
 321         struct obd_export *exp;
 322         char nidstr[LNET_NIDSTR_SIZE] = "<unknown>";
 323         int rc;
 324
 325         mutex_lock(&active_config_lock);
 326         nodemap = nodemap_lookup(m->private);
 327         mutex_unlock(&active_config_lock);
 328         if (IS_ERR(nodemap)) {
 329                 rc = PTR_ERR(nodemap);
 330                 CERROR("cannot find nodemap '%s': rc = %d\n",
 331                         (char *)m->private, rc);
 332                 return rc;
 333         }
 334
 335         seq_printf(m, "[\n");
 336
 337         mutex_lock(&nodemap->nm_member_list_lock);
 338         list_for_each_entry(exp, &nodemap->nm_member_list,
 339                             exp_target_data.ted_nodemap_member) {
 340                 if (exp->exp_connection != NULL)
 341                         libcfs_nid2str_r(exp->exp_connection->c_peer.nid,
 342                                          nidstr, sizeof(nidstr));
 343
 344                 seq_printf(m, " { nid: %s, uuid: %s },",
 345                            nidstr, exp->exp_client_uuid.uuid);
 346         }
 347         mutex_unlock(&nodemap->nm_member_list_lock);
 348
 349         seq_printf(m, "\n");
 350         seq_printf(m, "]\n");
 351
 352         nodemap_putref(nodemap);
 353         return 0;
 354 }
 355
 356 /**
 357  * Attaches nodemap_idmap_show to proc file.
 358  *
 359  * \param       inode           inode of seq file in proc fs
 360  * \param       file            seq file
 361  * \retval      0               success
 362  */
 363 static int nodemap_exports_open(struct inode *inode, struct file *file)
 364 {
 365         return single_open(file, nodemap_exports_show, PDE_DATA(inode));
 366 }
 367
 368 /**
 369  * Reads and prints the active flag for the given nodemap.
 370  *
 371  * \param       m               seq file in proc fs
 372  * \param       data            unused
 373  * \retval      0               success
 374  */
 375 static int nodemap_active_seq_show(struct seq_file *m, void *data)
 376 {
 377         seq_printf(m, "%u\n", (unsigned int)nodemap_active);
 378         return 0;
 379 }
 380
 381 /**
 382  * Activate/deactivate nodemap.
 383  *
 384  * \param[in] file      proc file
 385  * \param[in] buffer    string, "1" or "0" to activate/deactivate nodemap
 386  * \param[in] count     \a buffer length
 387  * \param[in] off       unused
 388  * \retval              \a count on success
 389  * \retval              negative number on error
 390  */
 391 static ssize_t
 392 nodemap_active_seq_write(struct file *file, const char __user *buffer,
 393                          size_t count, loff_t *off)
 394 {
 395         char                    active_string[NODEMAP_LPROC_FLAG_LEN + 1];
 396         long unsigned int       active;
 397         int                     rc;
 398
 399         if (count == 0)
 400                 return 0;
 401
 402         if (count >= sizeof(active_string))
 403                 return -EINVAL;
 404
 405         if (copy_from_user(active_string, buffer, count))
 406                 return -EFAULT;
 407
 408         active_string[count] = '\0';
 409         rc = kstrtoul(active_string, 10, &active);
 410         if (rc != 0)
 411                 return -EINVAL;
 412
 413         nodemap_activate(active);
 414
 415         return count;
 416 }
 417 LPROC_SEQ_FOPS(nodemap_active);
 418
 419 /**
 420  * Reads and prints the nodemap ID for the given nodemap.
 421  *
 422  * \param       m               seq file in proc fs
 423  * \param       data            unused
 424  * \retval      0               success
 425  */
 426 static int nodemap_id_seq_show(struct seq_file *m, void *data)
 427 {
 428         struct lu_nodemap *nodemap;
 429
 430         mutex_lock(&active_config_lock);
 431         nodemap = nodemap_lookup(m->private);
 432         mutex_unlock(&active_config_lock);
 433         if (IS_ERR(nodemap)) {
 434                 int rc = PTR_ERR(nodemap);
 435                 CERROR("cannot find nodemap '%s': rc = %d\n",
 436                         (char *)m->private, rc);
 437                 return rc;
 438         }
 439
 440         seq_printf(m, "%u\n", nodemap->nm_id);
 441         nodemap_putref(nodemap);
 442         return 0;
 443 }
 444 LPROC_SEQ_FOPS_RO(nodemap_id);
 445
 446 /**
 447  * Reads and prints the root squash UID for the given nodemap.
 448  *
 449  * \param       m               seq file in proc fs
 450  * \param       data            unused
 451  * \retval      0               success
 452  */
 453 static int nodemap_squash_uid_seq_show(struct seq_file *m, void *data)
 454 {
 455         struct lu_nodemap *nodemap;
 456
 457         mutex_lock(&active_config_lock);
 458         nodemap = nodemap_lookup(m->private);
 459         mutex_unlock(&active_config_lock);
 460         if (IS_ERR(nodemap)) {
 461                 int rc = PTR_ERR(nodemap);
 462                 CERROR("cannot find nodemap '%s': rc = %d\n",
 463                         (char *)m->private, rc);
 464                 return rc;
 465         }
 466
 467         seq_printf(m, "%u\n", nodemap->nm_squash_uid);
 468         nodemap_putref(nodemap);
 469         return 0;
 470 }
 471
 472 /**
 473  * Reads and prints the root squash GID for the given nodemap.
 474  *
 475  * \param       m               seq file in proc fs
 476  * \param       data            unused
 477  * \retval      0               success
 478  */
 479 static int nodemap_squash_gid_seq_show(struct seq_file *m, void *data)
 480 {
 481         struct lu_nodemap *nodemap;
 482
 483         mutex_lock(&active_config_lock);
 484         nodemap = nodemap_lookup(m->private);
 485         mutex_unlock(&active_config_lock);
 486         if (IS_ERR(nodemap)) {
 487                 int rc = PTR_ERR(nodemap);
 488                 CERROR("cannot find nodemap '%s': rc = %d\n",
 489                         (char *)m->private, rc);
 490                 return rc;
 491         }
 492
 493         seq_printf(m, "%u\n", nodemap->nm_squash_gid);
 494         nodemap_putref(nodemap);
 495         return 0;
 496 }
 497
 498 /**
 499  * Reads and prints the trusted flag for the given nodemap.
 500  *
 501  * \param       m               seq file in proc fs
 502  * \param       data            unused
 503  * \retval      0               success
 504  */
 505 static int nodemap_trusted_seq_show(struct seq_file *m, void *data)
 506 {
 507         struct lu_nodemap *nodemap;
 508
 509         mutex_lock(&active_config_lock);
 510         nodemap = nodemap_lookup(m->private);
 511         mutex_unlock(&active_config_lock);
 512         if (IS_ERR(nodemap)) {
 513                 int rc = PTR_ERR(nodemap);
 514
 515                 CERROR("cannot find nodemap '%s': rc = %d\n",
 516                         (char *)m->private, rc);
 517                 return rc;
 518         }
 519
 520         seq_printf(m, "%d\n", (int)nodemap->nmf_trust_client_ids);
 521         nodemap_putref(nodemap);
 522         return 0;
 523 }
 524
 525 /**
 526  * Reads and prints the admin flag for the given nodemap.
 527  *
 528  * \param       m               seq file in proc fs
 529  * \param       data            unused
 530  * \retval      0               success
 531  */
 532 static int nodemap_admin_seq_show(struct seq_file *m, void *data)
 533 {
 534         struct lu_nodemap *nodemap;
 535         int rc;
 536
 537         mutex_lock(&active_config_lock);
 538         nodemap = nodemap_lookup(m->private);
 539         mutex_unlock(&active_config_lock);
 540         if (IS_ERR(nodemap)) {
 541                 rc = PTR_ERR(nodemap);
 542                 CERROR("cannot find nodemap '%s': rc = %d\n",
 543                         (char *)m->private, rc);
 544                 return rc;
 545         }
 546
 547         seq_printf(m, "%d\n", (int)nodemap->nmf_allow_root_access);
 548         nodemap_putref(nodemap);
 549         return 0;
 550 }
 551
 552 /**
 553  * Reads and prints the mapping mode for the given nodemap.
 554  *
 555  * \param       m               seq file in proc fs
 556  * \param       data            unused
 557  * \retval      0               success
 558  */
 559 static int nodemap_map_mode_seq_show(struct seq_file *m, void *data)
 560 {
 561         struct lu_nodemap *nodemap;
 562         int rc;
 563
 564         mutex_lock(&active_config_lock);
 565         nodemap = nodemap_lookup(m->private);
 566         mutex_unlock(&active_config_lock);
 567         if (IS_ERR(nodemap)) {
 568                 rc = PTR_ERR(nodemap);
 569                 CERROR("cannot find nodemap '%s': rc = %d\n",
 570                         (char *)m->private, rc);
 571                 return rc;
 572         }
 573
 574         if (nodemap->nmf_map_uid_only)
 575                 seq_printf(m, "uid_only\n");
 576         else if (nodemap->nmf_map_gid_only)
 577                 seq_printf(m, "gid_only\n");
 578         else
 579                 seq_printf(m, "both\n");
 580
 581         nodemap_putref(nodemap);
 582         return 0;
 583 }
 584
 585 /**
 586  * Reads and prints the deny_unknown flag for the given nodemap.
 587  *
 588  * \param       m               seq file in proc fs
 589  * \param       data            unused
 590  * \retval      0               success
 591  */
 592 static int nodemap_deny_unknown_seq_show(struct seq_file *m, void *data)
 593 {
 594         struct lu_nodemap *nodemap;
 595         int rc;
 596
 597         mutex_lock(&active_config_lock);
 598         nodemap = nodemap_lookup(m->private);
 599         mutex_unlock(&active_config_lock);
 600         if (IS_ERR(nodemap)) {
 601                 rc = PTR_ERR(nodemap);
 602                 CERROR("cannot find nodemap '%s': rc = %d\n",
 603                         (char *)m->private, rc);
 604                 return rc;
 605         }
 606
 607         seq_printf(m, "%d\n", (int)nodemap->nmf_deny_unknown);
 608         nodemap_putref(nodemap);
 609         return 0;
 610 }
 611
 612 /**
 613  * Reads and prints the audit_mode flag for the given nodemap.
 614  *
 615  * \param       m               seq file in proc fs
 616  * \param       data            unused
 617  * \retval      0               success
 618  */
 619 static int nodemap_audit_mode_seq_show(struct seq_file *m, void *data)
 620 {
 621         struct lu_nodemap *nodemap;
 622         int rc;
 623
 624         mutex_lock(&active_config_lock);
 625         nodemap = nodemap_lookup(m->private);
 626         mutex_unlock(&active_config_lock);
 627         if (IS_ERR(nodemap)) {
 628                 rc = PTR_ERR(nodemap);
 629                 CERROR("cannot find nodemap '%s': rc = %d\n",
 630                        (char *)m->private, rc);
 631                 return rc;
 632         }
 633
 634         seq_printf(m, "%d\n", (int)nodemap->nmf_enable_audit);
 635         nodemap_putref(nodemap);
 636         return 0;
 637 }
 638
 639 static struct lprocfs_vars lprocfs_nm_module_vars[] = {
 640         {
 641                 .name           = "active",
 642                 .fops           = &nodemap_active_fops,
 643         },
 644         {
 645                 NULL
 646         }
 647 };
 648
 649 LPROC_SEQ_FOPS_RO(nodemap_trusted);
 650 LPROC_SEQ_FOPS_RO(nodemap_admin);
 651 LPROC_SEQ_FOPS_RO(nodemap_squash_uid);
 652 LPROC_SEQ_FOPS_RO(nodemap_squash_gid);
 653
 654 LPROC_SEQ_FOPS_RO(nodemap_deny_unknown);
 655 LPROC_SEQ_FOPS_RO(nodemap_map_mode);
 656 LPROC_SEQ_FOPS_RO(nodemap_audit_mode);
 657
 658 const struct file_operations nodemap_ranges_fops = {
 659         .open                   = nodemap_ranges_open,
 660         .read                   = seq_read,
 661         .llseek                 = seq_lseek,
 662         .release                = single_release
 663 };
 664
 665 const struct file_operations nodemap_idmap_fops = {
 666         .open                   = nodemap_idmap_open,
 667         .read                   = seq_read,
 668         .llseek                 = seq_lseek,
 669         .release                = single_release
 670 };
 671
 672 const struct file_operations nodemap_exports_fops = {
 673         .open                   = nodemap_exports_open,
 674         .read                   = seq_read,
 675         .llseek                 = seq_lseek,
 676         .release                = single_release
 677 };
 678
 679 static struct lprocfs_vars lprocfs_nodemap_vars[] = {
 680         {
 681                 .name           = "id",
 682                 .fops           = &nodemap_id_fops,
 683         },
 684         {
 685                 .name           = "trusted_nodemap",
 686                 .fops           = &nodemap_trusted_fops,
 687         },
 688         {
 689                 .name           = "admin_nodemap",
 690                 .fops           = &nodemap_admin_fops,
 691         },
 692         {
 693                 .name           = "deny_unknown",
 694                 .fops           = &nodemap_deny_unknown_fops,
 695         },
 696         {
 697                 .name           = "map_mode",
 698                 .fops           = &nodemap_map_mode_fops,
 699         },
 700         {
 701                 .name           = "audit_mode",
 702                 .fops           = &nodemap_audit_mode_fops,
 703         },
 704         {
 705                 .name           = "squash_uid",
 706                 .fops           = &nodemap_squash_uid_fops,
 707         },
 708         {
 709                 .name           = "squash_gid",
 710                 .fops           = &nodemap_squash_gid_fops,
 711         },
 712         {
 713                 .name           = "ranges",
 714                 .fops           = &nodemap_ranges_fops,
 715         },
 716         {
 717                 .name           = "fileset",
 718                 .fops           = &nodemap_fileset_fops,
 719         },
 720         {
 721                 .name           = "sepol",
 722                 .fops           = &nodemap_sepol_fops,
 723         },
 724         {
 725                 .name           = "exports",
 726                 .fops           = &nodemap_exports_fops,
 727         },
 728         {
 729                 .name           = "idmap",
 730                 .fops           = &nodemap_idmap_fops,
 731         },
 732         {
 733                 NULL
 734         }
 735 };
 736
 737 static struct lprocfs_vars lprocfs_default_nodemap_vars[] = {
 738         {
 739                 .name           = "id",
 740                 .fops           = &nodemap_id_fops,
 741         },
 742         {
 743                 .name           = "trusted_nodemap",
 744                 .fops           = &nodemap_trusted_fops,
 745         },
 746         {
 747                 .name           = "admin_nodemap",
 748                 .fops           = &nodemap_admin_fops,
 749         },
 750         {
 751                 .name           = "squash_uid",
 752                 .fops           = &nodemap_squash_uid_fops,
 753         },
 754         {
 755                 .name           = "squash_gid",
 756                 .fops           = &nodemap_squash_gid_fops,
 757         },
 758         {
 759                 .name           = "fileset",
 760                 .fops           = &nodemap_fileset_fops,
 761         },
 762         {
 763                 .name           = "exports",
 764                 .fops           = &nodemap_exports_fops,
 765         },
 766         {
 767                 .name           = "audit_mode",
 768                 .fops           = &nodemap_audit_mode_fops,
 769         },
 770         {
 771                 NULL
 772         }
 773 };
 774
 775 /**
 776  * Initialize the nodemap procfs directory.
 777  *
 778  * \retval      0               success
 779  */
 780 int nodemap_procfs_init(void)
 781 {
 782         int rc = 0;
 783
 784         proc_lustre_nodemap_root = lprocfs_register(LUSTRE_NODEMAP_NAME,
 785                                                     proc_lustre_root,
 786                                                     lprocfs_nm_module_vars,
 787                                                     NULL);
 788         if (IS_ERR(proc_lustre_nodemap_root)) {
 789                 rc = PTR_ERR(proc_lustre_nodemap_root);
 790                 CERROR("cannot create 'nodemap' directory: rc = %d\n",
 791                        rc);
 792                 proc_lustre_nodemap_root = NULL;
 793         }
 794         return rc;
 795 }
 796
 797 /**
 798  * Cleanup nodemap proc entry data structures.
 799  */
 800 void nodemap_procfs_exit(void)
 801 {
 802         struct nodemap_pde *nm_pde;
 803         struct nodemap_pde *tmp;
 804
 805         lprocfs_remove(&proc_lustre_nodemap_root);
 806         list_for_each_entry_safe(nm_pde, tmp, &nodemap_pde_list,
 807                                  npe_list_member) {
 808                 list_del(&nm_pde->npe_list_member);
 809                 OBD_FREE_PTR(nm_pde);
 810         }
 811 }
 812
 813 /**
 814  * Remove a nodemap's procfs entry and related data.
 815  */
 816 void lprocfs_nodemap_remove(struct nodemap_pde *nm_pde)
 817 {
 818         lprocfs_remove(&nm_pde->npe_proc_entry);
 819         list_del(&nm_pde->npe_list_member);
 820         OBD_FREE_PTR(nm_pde);
 821 }
 822
 823 /**
 824  * Register the proc directory for a nodemap
 825  *
 826  * \param       nodemap         nodemap to make the proc dir for
 827  * \param       is_default:     1 if default nodemap
 828  * \retval      0               success
 829  */
 830 int lprocfs_nodemap_register(struct lu_nodemap *nodemap, bool is_default)
 831 {
 832         struct nodemap_pde      *nm_entry;
 833         int                      rc = 0;
 834
 835         OBD_ALLOC_PTR(nm_entry);
 836         if (nm_entry == NULL)
 837                 GOTO(out, rc = -ENOMEM);
 838
 839         nm_entry->npe_proc_entry = proc_mkdir(nodemap->nm_name,
 840                                               proc_lustre_nodemap_root);
 841         if (IS_ERR(nm_entry->npe_proc_entry))
 842                 GOTO(out, rc = PTR_ERR(nm_entry->npe_proc_entry));
 843
 844         snprintf(nm_entry->npe_name, sizeof(nm_entry->npe_name), "%s",
 845                  nodemap->nm_name);
 846
 847         /* Use the nodemap name as stored on the PDE as the private data. This
 848          * is so a nodemap struct can be replaced without updating the proc
 849          * entries.
 850          */
 851         rc = lprocfs_add_vars(nm_entry->npe_proc_entry,
 852                               (is_default ? lprocfs_default_nodemap_vars :
 853                                             lprocfs_nodemap_vars),
 854                               nm_entry->npe_name);
 855         if (rc != 0)
 856                 lprocfs_remove(&nm_entry->npe_proc_entry);
 857         else
 858                 list_add(&nm_entry->npe_list_member, &nodemap_pde_list);
 859
 860 out:
 861         if (rc != 0) {
 862                 CERROR("cannot create 'nodemap/%s': rc = %d\n",
 863                        nodemap->nm_name, rc);
 864                 if (nm_entry != NULL) {
 865                         OBD_FREE_PTR(nm_entry);
 866                         nm_entry = NULL;
 867                 }
 868         }
 869
 870         nodemap->nm_pde_data = nm_entry;
 871
 872         return rc;
 873 }