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, 2015, 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         read_lock(&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         read_unlock(&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;
 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         rc = 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         int rc = 0;
 214
 215         if (count > 0)
 216                 rc = nodemap_set_fileset(m->private, buffer);
 217
 218         if (rc != 0)
 219                 return -EINVAL;
 220
 221         return count;
 222 }
 223 LPROC_SEQ_FOPS(nodemap_fileset);
 224
 225 /**
 226  * Reads and prints the exports attached to the given nodemap.
 227  *
 228  * \param       m               seq file in proc fs, stores nodemap
 229  * \param       data            unused
 230  * \retval      0               success
 231  */
 232 static int nodemap_exports_show(struct seq_file *m, void *data)
 233 {
 234         struct lu_nodemap *nodemap;
 235         struct obd_export *exp;
 236         char nidstr[LNET_NIDSTR_SIZE] = "<unknown>";
 237         int rc;
 238
 239         mutex_lock(&active_config_lock);
 240         nodemap = nodemap_lookup(m->private);
 241         mutex_unlock(&active_config_lock);
 242         if (IS_ERR(nodemap)) {
 243                 rc = PTR_ERR(nodemap);
 244                 CERROR("cannot find nodemap '%s': rc = %d\n",
 245                         (char *)m->private, rc);
 246                 return rc;
 247         }
 248
 249         seq_printf(m, "[\n");
 250
 251         mutex_lock(&nodemap->nm_member_list_lock);
 252         list_for_each_entry(exp, &nodemap->nm_member_list,
 253                             exp_target_data.ted_nodemap_member) {
 254                 if (exp->exp_connection != NULL)
 255                         libcfs_nid2str_r(exp->exp_connection->c_peer.nid,
 256                                          nidstr, sizeof(nidstr));
 257
 258                 seq_printf(m, " { nid: %s, uuid: %s },",
 259                            nidstr, exp->exp_client_uuid.uuid);
 260         }
 261         mutex_unlock(&nodemap->nm_member_list_lock);
 262
 263         seq_printf(m, "\n");
 264         seq_printf(m, "]\n");
 265
 266         nodemap_putref(nodemap);
 267         return 0;
 268 }
 269
 270 /**
 271  * Attaches nodemap_idmap_show to proc file.
 272  *
 273  * \param       inode           inode of seq file in proc fs
 274  * \param       file            seq file
 275  * \retval      0               success
 276  */
 277 static int nodemap_exports_open(struct inode *inode, struct file *file)
 278 {
 279         return single_open(file, nodemap_exports_show, PDE_DATA(inode));
 280 }
 281
 282 /**
 283  * Reads and prints the active flag for the given nodemap.
 284  *
 285  * \param       m               seq file in proc fs
 286  * \param       data            unused
 287  * \retval      0               success
 288  */
 289 static int nodemap_active_seq_show(struct seq_file *m, void *data)
 290 {
 291         seq_printf(m, "%u\n", (unsigned int)nodemap_active);
 292         return 0;
 293 }
 294
 295 /**
 296  * Activate/deactivate nodemap.
 297  *
 298  * \param[in] file      proc file
 299  * \param[in] buffer    string, "1" or "0" to activate/deactivate nodemap
 300  * \param[in] count     \a buffer length
 301  * \param[in] off       unused
 302  * \retval              \a count on success
 303  * \retval              negative number on error
 304  */
 305 static ssize_t
 306 nodemap_active_seq_write(struct file *file, const char __user *buffer,
 307                          size_t count, loff_t *off)
 308 {
 309         char                    active_string[NODEMAP_LPROC_FLAG_LEN + 1];
 310         long unsigned int       active;
 311         int                     rc;
 312
 313         if (count == 0)
 314                 return 0;
 315
 316         if (count >= sizeof(active_string))
 317                 return -EINVAL;
 318
 319         if (copy_from_user(active_string, buffer, count))
 320                 return -EFAULT;
 321
 322         active_string[count] = '\0';
 323         rc = kstrtoul(active_string, 10, &active);
 324         if (rc != 0)
 325                 return -EINVAL;
 326
 327         nodemap_activate(active);
 328
 329         return count;
 330 }
 331 LPROC_SEQ_FOPS(nodemap_active);
 332
 333 /**
 334  * Reads and prints the nodemap ID for the given nodemap.
 335  *
 336  * \param       m               seq file in proc fs
 337  * \param       data            unused
 338  * \retval      0               success
 339  */
 340 static int nodemap_id_seq_show(struct seq_file *m, void *data)
 341 {
 342         struct lu_nodemap *nodemap;
 343
 344         mutex_lock(&active_config_lock);
 345         nodemap = nodemap_lookup(m->private);
 346         mutex_unlock(&active_config_lock);
 347         if (IS_ERR(nodemap)) {
 348                 int rc = PTR_ERR(nodemap);
 349                 CERROR("cannot find nodemap '%s': rc = %d\n",
 350                         (char *)m->private, rc);
 351                 return rc;
 352         }
 353
 354         seq_printf(m, "%u\n", nodemap->nm_id);
 355         nodemap_putref(nodemap);
 356         return 0;
 357 }
 358 LPROC_SEQ_FOPS_RO(nodemap_id);
 359
 360 /**
 361  * Reads and prints the root squash UID for the given nodemap.
 362  *
 363  * \param       m               seq file in proc fs
 364  * \param       data            unused
 365  * \retval      0               success
 366  */
 367 static int nodemap_squash_uid_seq_show(struct seq_file *m, void *data)
 368 {
 369         struct lu_nodemap *nodemap;
 370
 371         mutex_lock(&active_config_lock);
 372         nodemap = nodemap_lookup(m->private);
 373         mutex_unlock(&active_config_lock);
 374         if (IS_ERR(nodemap)) {
 375                 int rc = PTR_ERR(nodemap);
 376                 CERROR("cannot find nodemap '%s': rc = %d\n",
 377                         (char *)m->private, rc);
 378                 return rc;
 379         }
 380
 381         seq_printf(m, "%u\n", nodemap->nm_squash_uid);
 382         nodemap_putref(nodemap);
 383         return 0;
 384 }
 385
 386 /**
 387  * Reads and prints the root squash GID for the given nodemap.
 388  *
 389  * \param       m               seq file in proc fs
 390  * \param       data            unused
 391  * \retval      0               success
 392  */
 393 static int nodemap_squash_gid_seq_show(struct seq_file *m, void *data)
 394 {
 395         struct lu_nodemap *nodemap;
 396
 397         mutex_lock(&active_config_lock);
 398         nodemap = nodemap_lookup(m->private);
 399         mutex_unlock(&active_config_lock);
 400         if (IS_ERR(nodemap)) {
 401                 int rc = PTR_ERR(nodemap);
 402                 CERROR("cannot find nodemap '%s': rc = %d\n",
 403                         (char *)m->private, rc);
 404                 return rc;
 405         }
 406
 407         seq_printf(m, "%u\n", nodemap->nm_squash_gid);
 408         nodemap_putref(nodemap);
 409         return 0;
 410 }
 411
 412 /**
 413  * Reads and prints the trusted flag for the given nodemap.
 414  *
 415  * \param       m               seq file in proc fs
 416  * \param       data            unused
 417  * \retval      0               success
 418  */
 419 static int nodemap_trusted_seq_show(struct seq_file *m, void *data)
 420 {
 421         struct lu_nodemap *nodemap;
 422
 423         mutex_lock(&active_config_lock);
 424         nodemap = nodemap_lookup(m->private);
 425         mutex_unlock(&active_config_lock);
 426         if (IS_ERR(nodemap)) {
 427                 int rc = PTR_ERR(nodemap);
 428
 429                 CERROR("cannot find nodemap '%s': rc = %d\n",
 430                         (char *)m->private, rc);
 431                 return rc;
 432         }
 433
 434         seq_printf(m, "%d\n", (int)nodemap->nmf_trust_client_ids);
 435         nodemap_putref(nodemap);
 436         return 0;
 437 }
 438
 439 /**
 440  * Reads and prints the admin flag for the given nodemap.
 441  *
 442  * \param       m               seq file in proc fs
 443  * \param       data            unused
 444  * \retval      0               success
 445  */
 446 static int nodemap_admin_seq_show(struct seq_file *m, void *data)
 447 {
 448         struct lu_nodemap *nodemap;
 449         int rc;
 450
 451         mutex_lock(&active_config_lock);
 452         nodemap = nodemap_lookup(m->private);
 453         mutex_unlock(&active_config_lock);
 454         if (IS_ERR(nodemap)) {
 455                 rc = PTR_ERR(nodemap);
 456                 CERROR("cannot find nodemap '%s': rc = %d\n",
 457                         (char *)m->private, rc);
 458                 return rc;
 459         }
 460
 461         seq_printf(m, "%d\n", (int)nodemap->nmf_allow_root_access);
 462         nodemap_putref(nodemap);
 463         return 0;
 464 }
 465
 466 #ifdef NODEMAP_PROC_DEBUG
 467 /**
 468  * Helper functions to set nodemap flags.
 469  *
 470  * \param[in] buffer    string, which is "1" or "0" to set/unset flag
 471  * \param[in] count     \a buffer length
 472  * \param[out] flag_p   where to store flag value
 473  * \retval              \a count on success
 474  * \retval              negative number on error
 475  */
 476 static int nodemap_proc_read_flag(const char __user *buffer,
 477                                   unsigned long count, unsigned int *flag_p)
 478 {
 479         char                    scratch[NODEMAP_LPROC_FLAG_LEN + 1];
 480         long unsigned int       flag_buf;
 481         int                     rc;
 482
 483         if (count == 0)
 484                 return 0;
 485
 486         if (count >= sizeof(scratch))
 487                 return -EINVAL;
 488
 489         if (copy_from_user(scratch, buffer, count))
 490                 return -EFAULT;
 491
 492         scratch[count] = '\0';
 493         rc = kstrtoul(scratch, 10, &flag_buf);
 494         if (rc != 0)
 495                 return -EINVAL;
 496
 497         *flag_p = flag_buf;
 498
 499         return count;
 500 }
 501
 502 /**
 503  * Set the squash UID.
 504  *
 505  * \param[in] file      proc file
 506  * \param[in] buffer    string representing squash UID to set
 507  * \param[in] count     \a buffer length
 508  * \param[in] off       unused
 509  * \retval              \a count on success
 510  * \retval              negative number on error
 511  */
 512 static ssize_t
 513 nodemap_squash_uid_seq_write(struct file *file, const char __user *buffer,
 514                              size_t count, loff_t *off)
 515 {
 516         char                     squash[NODEMAP_LPROC_ID_LEN + 1];
 517         struct seq_file         *m = file->private_data;
 518         long unsigned int        squash_uid;
 519         int                      rc;
 520
 521         if (count == 0)
 522                 return 0;
 523
 524         if (count >= sizeof(squash))
 525                 return -EINVAL;
 526
 527         if (copy_from_user(squash, buffer, count))
 528                 return -EFAULT;
 529
 530         squash[count] = '\0';
 531         rc = kstrtoul(squash, 10, &squash_uid);
 532         if (rc != 0)
 533                 return -EINVAL;
 534
 535         rc = nodemap_set_squash_uid(m->private, squash_uid);
 536         if (rc != 0)
 537                 return rc;
 538
 539         return count;
 540 }
 541
 542 /**
 543  * Set the squash GID.
 544  *
 545  * \param[in] file      proc file
 546  * \param[in] buffer    string representing squash GID to set
 547  * \param[in] count     \a buffer length
 548  * \param[in] off       unused
 549  * \retval              \a count on success
 550  * \retval              negative number on error
 551  */
 552 static ssize_t
 553 nodemap_squash_gid_seq_write(struct file *file, const char __user *buffer,
 554                              size_t count, loff_t *off)
 555 {
 556         char                     squash[NODEMAP_LPROC_ID_LEN + 1];
 557         struct seq_file         *m = file->private_data;
 558         long unsigned int        squash_gid;
 559         int                      rc;
 560
 561         if (count == 0)
 562                 return 0;
 563
 564         if (count >= sizeof(squash))
 565                 return -EINVAL;
 566
 567         if (copy_from_user(squash, buffer, count))
 568                 return -EFAULT;
 569
 570         squash[count] = '\0';
 571         rc = kstrtoul(squash, 10, &squash_gid);
 572         if (rc != 0)
 573                 return -EINVAL;
 574
 575         rc = nodemap_set_squash_gid(m->private, squash_gid);
 576         if (rc != 0)
 577                 return rc;
 578
 579         return count;
 580 }
 581
 582 /**
 583  * Set/unset the trusted flag.
 584  *
 585  * \param[in] file      proc file
 586  * \param[in] buffer    string, "1" or "0"
 587  * \param[in] count     \a buffer length
 588  * \param[in] off       unused
 589  * \retval              \a count on success
 590  * \retval              negative number on error
 591  */
 592 static ssize_t
 593 nodemap_trusted_seq_write(struct file *file, const char __user *buffer,
 594                           size_t count, loff_t *off)
 595 {
 596         struct seq_file         *m = file->private_data;
 597         int                     flags;
 598         int                     rc;
 599
 600         rc = nodemap_proc_read_flag(buffer, count, &flags);
 601         if (rc < 0)
 602                 return rc;
 603
 604         rc = nodemap_set_trust_client_ids(m->private, flags);
 605         if (rc != 0)
 606                 return rc;
 607
 608         return count;
 609 }
 610
 611 /**
 612  * Set/unset the admin flag.
 613  *
 614  * \param[in] file      proc file
 615  * \param[in] buffer    string, "1" or "0"
 616  * \param[in] count     \a buffer length
 617  * \param[in] off       unused
 618  * \retval              \a count on success
 619  * \retval              negative number on error
 620  */
 621 static ssize_t
 622 nodemap_admin_seq_write(struct file *file, const char __user *buffer,
 623                         size_t count, loff_t *off)
 624 {
 625         struct seq_file         *m = file->private_data;
 626         int                     flags;
 627         int                     rc;
 628
 629         rc = nodemap_proc_read_flag(buffer, count, &flags);
 630         if (rc < 0)
 631                 return rc;
 632
 633         rc = nodemap_set_allow_root(m->private, flags);
 634         if (rc != 0)
 635                 return rc;
 636
 637         return count;
 638 }
 639
 640 /**
 641  * Add a nodemap.
 642  *
 643  * \param[in] file      proc file
 644  * \param[in] buffer    string, name of the nodemap to add
 645  * \param[in] count     \a buffer length
 646  * \param[in] off       unused
 647  * \retval              \a count on success
 648  * \retval              negative number on error
 649  */
 650 static ssize_t
 651 lprocfs_add_nodemap_seq_write(struct file *file, const char __user *buffer,
 652                               size_t count, loff_t *off)
 653 {
 654         char    nodemap_name[LUSTRE_NODEMAP_NAME_LENGTH + 1];
 655         char    *cpybuf = NULL;
 656         char    *pos;
 657         int     rc;
 658
 659         if (count == 0)
 660                 return 0;
 661
 662         if (count >= sizeof(nodemap_name))
 663                 return -EINVAL;
 664
 665         if (copy_from_user(nodemap_name, buffer, count))
 666                 return -EFAULT;
 667
 668         nodemap_name[count] = '\0';
 669
 670         cpybuf = nodemap_name;
 671         pos = strsep(&cpybuf, " \n");
 672         if (pos == NULL)
 673                 return -EINVAL;
 674
 675         rc = nodemap_add(nodemap_name);
 676         if (rc == 0)
 677                 rc = count;
 678
 679         return rc;
 680 }
 681 LPROC_SEQ_FOPS_WO_TYPE(nodemap, add_nodemap);
 682
 683 /**
 684  * Delete a nodemap.
 685  *
 686  * \param[in] file      proc file
 687  * \param[in] buffer    string, name of the nodemap to delete
 688  * \param[in] count     \a buffer length
 689  * \param[in] off       unused
 690  * \retval              \a count on success
 691  * \retval              negative number on error
 692  */
 693 static ssize_t
 694 lprocfs_del_nodemap_seq_write(struct file *file, const char __user *buffer,
 695                               size_t count, loff_t *off)
 696 {
 697         char    nodemap_name[LUSTRE_NODEMAP_NAME_LENGTH + 1];
 698         char    *cpybuf = NULL;
 699         char    *pos;
 700         int     rc = count;
 701
 702         if (count == 0)
 703                 return 0;
 704
 705         if (count >= sizeof(nodemap_name))
 706                 return -EINVAL;
 707
 708         if (copy_from_user(nodemap_name, buffer, count))
 709                 return -EFAULT;
 710
 711         nodemap_name[count] = '\0';
 712
 713         cpybuf = nodemap_name;
 714         pos = strsep(&cpybuf, " \n");
 715         if (pos == NULL)
 716                 return -EINVAL;
 717
 718         rc = nodemap_del(nodemap_name);
 719         if (rc == 0)
 720                 rc = count;
 721
 722         return rc;
 723
 724 }
 725 LPROC_SEQ_FOPS_WO_TYPE(nodemap, del_nodemap);
 726
 727 /**
 728  * Helper function to parse a NID string.
 729  *
 730  * \param[in] rangestr  string representation of NIDs, see libcfs_str2nid()
 731  * \param[out] nids     array of two nids
 732  * \retval              0 on success
 733  * \retval              negative number on error
 734  */
 735 static int parse_nids(char *rangestr, lnet_nid_t nids[2])
 736 {
 737         struct list_head        nidlist;
 738         char                    nidstr[2][LNET_NIDSTR_SIZE];
 739         char                    nidrange_str[2 * LNET_NIDSTR_SIZE + 2];
 740         int                     rc = 0;
 741
 742         INIT_LIST_HEAD(&nidlist);
 743
 744         if (cfs_parse_nidlist(rangestr, strlen(rangestr),
 745             &nidlist) <= 0)
 746                 return -EINVAL;
 747
 748         if (!cfs_nidrange_is_contiguous(&nidlist))
 749                 return -EINVAL;
 750
 751         cfs_nidrange_find_min_max(&nidlist, nidstr[0], nidstr[1],
 752                                   LNET_NIDSTR_SIZE);
 753         snprintf(nidrange_str, sizeof(nidrange_str), "%s:%s",
 754                 nidstr[0], nidstr[1]);
 755
 756         rc = nodemap_parse_range(nidrange_str, nids);
 757         if (rc != 0)
 758                 return -EINVAL;
 759
 760         cfs_free_nidlist(&nidlist);
 761
 762         return 0;
 763 }
 764
 765 /**
 766  * Add a NID range to nodemap.
 767  *
 768  * \param[in] file      proc file
 769  * \param[in] buffer    string, "<nodemap name> <nid range>"
 770  * \param[in] count     \a buffer length
 771  * \param[in] off       unused
 772  * \retval              \a count on success
 773  * \retval              negative number on error
 774  */
 775 static ssize_t
 776 lprocfs_add_nodemap_range_seq_write(struct file *file,
 777                                     const char __user *buffer,
 778                                     size_t count, loff_t *off)
 779 {
 780         char                    name_range[LUSTRE_NODEMAP_NAME_LENGTH +
 781                                            LNET_NIDSTR_SIZE * 2 + 2];
 782         char                    *cpybuf = NULL;
 783         char                    *name;
 784         char                    *rangestr = NULL;
 785         lnet_nid_t              nids[2];
 786         int                     rc;
 787
 788         if (count == 0)
 789                 return 0;
 790
 791         if (count >= sizeof(name_range))
 792                 GOTO(out, rc = -EINVAL);
 793
 794         if (copy_from_user(name_range, buffer, count))
 795                 GOTO(out, rc = -EFAULT);
 796
 797         name_range[count] = '\0';
 798
 799         cpybuf = name_range;
 800         name = strsep(&cpybuf, " ");
 801         if (name == NULL)
 802                 GOTO(out, rc = -EINVAL);
 803
 804         rangestr = strsep(&cpybuf, " \n");
 805         if (rangestr == NULL)
 806                 GOTO(out, rc = -EINVAL);
 807
 808         rc = parse_nids(rangestr, nids);
 809         if (rc != 0)
 810                 GOTO(out, rc = rc);
 811
 812         rc = nodemap_add_range(name, nids);
 813         if (rc != 0)
 814                 GOTO(out, rc = -EINVAL);
 815
 816         if (rc == 0)
 817                 rc = count;
 818
 819 out:
 820         return rc;
 821 }
 822 LPROC_SEQ_FOPS_WO_TYPE(nodemap, add_nodemap_range);
 823
 824 /**
 825  * Delete a NID range from nodemap.
 826  *
 827  * \param[in] file      proc file
 828  * \param[in] buffer    string, "<nodemap name> <nid range>"
 829  * \param[in] count     \a buffer length
 830  * \param[in] off       unused
 831  * \retval              \a count on success
 832  * \retval              negative number on error
 833  */
 834 static ssize_t
 835 lprocfs_del_nodemap_range_seq_write(struct file *file,
 836                                     const char __user *buffer,
 837                                     size_t count, loff_t *off)
 838 {
 839         char                    name_range[LUSTRE_NODEMAP_NAME_LENGTH +
 840                                            LNET_NIDSTR_SIZE * 2 + 2];
 841         char                    *cpybuf = NULL;
 842         char                    *name;
 843         char                    *rangestr = NULL;
 844         lnet_nid_t              nids[2];
 845         int                     rc;
 846
 847         if (count == 0)
 848                 return 0;
 849
 850         if (count >= sizeof(name_range))
 851                 GOTO(out, rc = -EINVAL);
 852
 853         if (copy_from_user(name_range, buffer, count))
 854                 GOTO(out, rc = -EFAULT);
 855
 856         name_range[count] = '\0';
 857
 858         cpybuf = name_range;
 859         name = strsep(&cpybuf, " ");
 860         if (name == NULL)
 861                 GOTO(out, rc = -EINVAL);
 862
 863         rangestr = strsep(&cpybuf, " \n");
 864         if (rangestr == NULL)
 865                 GOTO(out, rc = -EINVAL);
 866
 867         rc = parse_nids(rangestr, nids);
 868         if (rc != 0)
 869                 GOTO(out, rc = rc);
 870
 871         rc = nodemap_del_range(name, nids);
 872         if (rc != 0)
 873                 GOTO(out, rc = -EINVAL);
 874
 875         if (rc == 0)
 876                 rc = count;
 877
 878 out:
 879         return rc;
 880 }
 881 LPROC_SEQ_FOPS_WO_TYPE(nodemap, del_nodemap_range);
 882
 883 /**
 884  * Add an idmap to nodemap.
 885  *
 886  * \param[in] file      proc file
 887  * \param[in] buffer    string, "<nodemap name> <uid|gid> <idmap>"
 888  * \param[in] count     \a buffer length
 889  * \param[in] off       unused
 890  * \retval              \a count on success
 891  * \retval              negative number on error
 892  */
 893 static ssize_t
 894 lprocfs_add_nodemap_idmap_seq_write(struct file *file,
 895                                     const char __user *buffer,
 896                                     size_t count, loff_t *off)
 897 {
 898         char                    name_idmapstr[LUSTRE_NODEMAP_NAME_LENGTH + 16];
 899         char                    *cpybuf = NULL;
 900         char                    *name;
 901         char                    *idtypestr = NULL;
 902         char                    *idmapstr = NULL;
 903         __u32                   idmap[2];
 904         int                     rc = count;
 905
 906         if (count == 0)
 907                 return 0;
 908
 909         if (count >= sizeof(name_idmapstr))
 910                 GOTO(out, rc = -EINVAL);
 911
 912         if (copy_from_user(name_idmapstr, buffer, count))
 913                 GOTO(out, rc = -EFAULT);
 914
 915         name_idmapstr[count] = '\0';
 916
 917         cpybuf = name_idmapstr;
 918         name = strsep(&cpybuf, " ");
 919         if (name == NULL)
 920                 GOTO(out, rc = -EINVAL);
 921
 922         idtypestr = strsep(&cpybuf, " ");
 923         if (idtypestr == NULL)
 924                 GOTO(out, rc = -EINVAL);
 925
 926         idmapstr = strsep(&cpybuf, " \n");
 927         if (idmapstr == NULL)
 928                 GOTO(out, rc = -EINVAL);
 929
 930         rc = nodemap_parse_idmap(idmapstr, idmap);
 931         if (rc != 0)
 932                 GOTO(out, rc = -EINVAL);
 933
 934         if (strcmp(idtypestr, "uid") == 0)
 935                 rc = nodemap_add_idmap(name, NODEMAP_UID, idmap);
 936         else if (strcmp(idtypestr, "gid") == 0)
 937                 rc = nodemap_add_idmap(name, NODEMAP_GID, idmap);
 938         else
 939                 GOTO(out, rc = -EINVAL);
 940
 941         if (rc != 0)
 942                 GOTO(out, rc = -EINVAL);
 943
 944         if (rc == 0)
 945                 rc = count;
 946
 947 out:
 948         return rc;
 949 }
 950 LPROC_SEQ_FOPS_WO_TYPE(nodemap, add_nodemap_idmap);
 951
 952 /**
 953  * Delete an idmap from nodemap.
 954  *
 955  * \param[in] file      proc file
 956  * \param[in] buffer    string, "<nodemap name> <uid|gid> <idmap>"
 957  * \param[in] count     \a buffer length
 958  * \param[in] off       unused
 959  * \retval              \a count on success
 960  * \retval              negative number on error
 961  */
 962 static ssize_t
 963 lprocfs_del_nodemap_idmap_seq_write(struct file *file,
 964                                     const char __user *buffer,
 965                                     size_t count, loff_t *off)
 966 {
 967         char                    name_idmapstr[LUSTRE_NODEMAP_NAME_LENGTH + 16];
 968         char                    *cpybuf = NULL;
 969         char                    *name;
 970         char                    *idtypestr = NULL;
 971         char                    *idmapstr = NULL;
 972         __u32                   idmap[2];
 973         int                     rc = count;
 974
 975         if (count == 0)
 976                 return 0;
 977
 978         if (count >= sizeof(name_idmapstr))
 979                 GOTO(out, rc = -EINVAL);
 980
 981         if (copy_from_user(name_idmapstr, buffer, count))
 982                 GOTO(out, rc = -EFAULT);
 983
 984         name_idmapstr[count] = '\0';
 985
 986         cpybuf = name_idmapstr;
 987         name = strsep(&cpybuf, " ");
 988         if (name == NULL)
 989                 GOTO(out, rc = -EINVAL);
 990
 991         idtypestr = strsep(&cpybuf, " ");
 992         if (idtypestr == NULL)
 993                 GOTO(out, rc = -EINVAL);
 994
 995         idmapstr = strsep(&cpybuf, " \n");
 996         if (idmapstr == NULL)
 997                 GOTO(out, rc = -EINVAL);
 998
 999         rc = nodemap_parse_idmap(idmapstr, idmap);
1000         if (rc != 0)
1001                 GOTO(out, rc = -EINVAL);
1002
1003         if (strcmp(idtypestr, "uid") == 0)
1004                 rc = nodemap_del_idmap(name, NODEMAP_UID, idmap);
1005         else if (strcmp(idtypestr, "gid") == 0)
1006                 rc = nodemap_del_idmap(name, NODEMAP_GID, idmap);
1007         else
1008                 GOTO(out, rc = -EINVAL);
1009
1010         if (rc != 0)
1011                 GOTO(out, rc = -EINVAL);
1012
1013         if (rc == 0)
1014                 rc = count;
1015
1016 out:
1017         return rc;
1018 }
1019 LPROC_SEQ_FOPS_WO_TYPE(nodemap, del_nodemap_idmap);
1020 #endif /* NODEMAP_PROC_DEBUG */
1021
1022 static struct lprocfs_vars lprocfs_nm_module_vars[] = {
1023         {
1024                 .name           = "active",
1025                 .fops           = &nodemap_active_fops,
1026         },
1027 #ifdef NODEMAP_PROC_DEBUG
1028         {
1029                 .name           = "add_nodemap",
1030                 .fops           = &nodemap_add_nodemap_fops,
1031         },
1032         {
1033                 .name           = "remove_nodemap",
1034                 .fops           = &nodemap_del_nodemap_fops,
1035         },
1036         {
1037                 .name           = "add_nodemap_range",
1038                 .fops           = &nodemap_add_nodemap_range_fops,
1039         },
1040         {
1041                 .name           = "del_nodemap_range",
1042                 .fops           = &nodemap_del_nodemap_range_fops,
1043         },
1044         {
1045                 .name           = "add_nodemap_idmap",
1046                 .fops           = &nodemap_add_nodemap_idmap_fops,
1047         },
1048         {
1049                 .name           = "del_nodemap_idmap",
1050                 .fops           = &nodemap_del_nodemap_idmap_fops,
1051         },
1052 #endif /* NODEMAP_PROC_DEBUG */
1053         {
1054                 NULL
1055         }
1056 };
1057
1058 #ifdef NODEMAP_PROC_DEBUG
1059 LPROC_SEQ_FOPS(nodemap_trusted);
1060 LPROC_SEQ_FOPS(nodemap_admin);
1061 LPROC_SEQ_FOPS(nodemap_squash_uid);
1062 LPROC_SEQ_FOPS(nodemap_squash_gid);
1063 #else
1064 LPROC_SEQ_FOPS_RO(nodemap_trusted);
1065 LPROC_SEQ_FOPS_RO(nodemap_admin);
1066 LPROC_SEQ_FOPS_RO(nodemap_squash_uid);
1067 LPROC_SEQ_FOPS_RO(nodemap_squash_gid);
1068 #endif
1069
1070 const struct file_operations nodemap_ranges_fops = {
1071         .open                   = nodemap_ranges_open,
1072         .read                   = seq_read,
1073         .llseek                 = seq_lseek,
1074         .release                = single_release
1075 };
1076
1077 const struct file_operations nodemap_idmap_fops = {
1078         .open                   = nodemap_idmap_open,
1079         .read                   = seq_read,
1080         .llseek                 = seq_lseek,
1081         .release                = single_release
1082 };
1083
1084 const struct file_operations nodemap_exports_fops = {
1085         .open                   = nodemap_exports_open,
1086         .read                   = seq_read,
1087         .llseek                 = seq_lseek,
1088         .release                = single_release
1089 };
1090
1091 static struct lprocfs_vars lprocfs_nodemap_vars[] = {
1092         {
1093                 .name           = "id",
1094                 .fops           = &nodemap_id_fops,
1095         },
1096         {
1097                 .name           = "trusted_nodemap",
1098                 .fops           = &nodemap_trusted_fops,
1099         },
1100         {
1101                 .name           = "admin_nodemap",
1102                 .fops           = &nodemap_admin_fops,
1103         },
1104         {
1105                 .name           = "squash_uid",
1106                 .fops           = &nodemap_squash_uid_fops,
1107         },
1108         {
1109                 .name           = "squash_gid",
1110                 .fops           = &nodemap_squash_gid_fops,
1111         },
1112         {
1113                 .name           = "ranges",
1114                 .fops           = &nodemap_ranges_fops,
1115         },
1116         {
1117                 .name           = "fileset",
1118                 .fops           = &nodemap_fileset_fops,
1119         },
1120         {
1121                 .name           = "exports",
1122                 .fops           = &nodemap_exports_fops,
1123         },
1124         {
1125                 .name           = "idmap",
1126                 .fops           = &nodemap_idmap_fops,
1127         },
1128         {
1129                 NULL
1130         }
1131 };
1132
1133 static struct lprocfs_vars lprocfs_default_nodemap_vars[] = {
1134         {
1135                 .name           = "id",
1136                 .fops           = &nodemap_id_fops,
1137         },
1138         {
1139                 .name           = "trusted_nodemap",
1140                 .fops           = &nodemap_trusted_fops,
1141         },
1142         {
1143                 .name           = "admin_nodemap",
1144                 .fops           = &nodemap_admin_fops,
1145         },
1146         {
1147                 .name           = "squash_uid",
1148                 .fops           = &nodemap_squash_uid_fops,
1149         },
1150         {
1151                 .name           = "squash_gid",
1152                 .fops           = &nodemap_squash_gid_fops,
1153         },
1154         {
1155                 .name           = "exports",
1156                 .fops           = &nodemap_exports_fops,
1157         },
1158         {
1159                 NULL
1160         }
1161 };
1162
1163 /**
1164  * Initialize the nodemap procfs directory.
1165  *
1166  * \retval      0               success
1167  */
1168 int nodemap_procfs_init(void)
1169 {
1170         int rc = 0;
1171
1172         proc_lustre_nodemap_root = lprocfs_register(LUSTRE_NODEMAP_NAME,
1173                                                     proc_lustre_root,
1174                                                     lprocfs_nm_module_vars,
1175                                                     NULL);
1176         if (IS_ERR(proc_lustre_nodemap_root)) {
1177                 rc = PTR_ERR(proc_lustre_nodemap_root);
1178                 CERROR("cannot create 'nodemap' directory: rc = %d\n",
1179                        rc);
1180                 proc_lustre_nodemap_root = NULL;
1181         }
1182         return rc;
1183 }
1184
1185 /**
1186  * Cleanup nodemap proc entry data structures.
1187  */
1188 void nodemap_procfs_exit(void)
1189 {
1190         struct nodemap_pde *nm_pde;
1191         struct nodemap_pde *tmp;
1192
1193         lprocfs_remove(&proc_lustre_nodemap_root);
1194         list_for_each_entry_safe(nm_pde, tmp, &nodemap_pde_list,
1195                                  npe_list_member) {
1196                 list_del(&nm_pde->npe_list_member);
1197                 OBD_FREE_PTR(nm_pde);
1198         }
1199 }
1200
1201 /**
1202  * Remove a nodemap's procfs entry and related data.
1203  */
1204 void lprocfs_nodemap_remove(struct nodemap_pde *nm_pde)
1205 {
1206         lprocfs_remove(&nm_pde->npe_proc_entry);
1207         list_del(&nm_pde->npe_list_member);
1208         OBD_FREE_PTR(nm_pde);
1209 }
1210
1211 /**
1212  * Register the proc directory for a nodemap
1213  *
1214  * \param       nodemap         nodemap to make the proc dir for
1215  * \param       is_default:     1 if default nodemap
1216  * \retval      0               success
1217  */
1218 int lprocfs_nodemap_register(struct lu_nodemap *nodemap, bool is_default)
1219 {
1220         struct nodemap_pde      *nm_entry;
1221         int                      rc = 0;
1222
1223         OBD_ALLOC_PTR(nm_entry);
1224         if (nm_entry == NULL)
1225                 GOTO(out, rc = -ENOMEM);
1226
1227         nm_entry->npe_proc_entry = proc_mkdir(nodemap->nm_name,
1228                                               proc_lustre_nodemap_root);
1229         if (IS_ERR(nm_entry->npe_proc_entry))
1230                 GOTO(out, rc = PTR_ERR(nm_entry->npe_proc_entry));
1231
1232         snprintf(nm_entry->npe_name, sizeof(nm_entry->npe_name), "%s",
1233                  nodemap->nm_name);
1234
1235         /* Use the nodemap name as stored on the PDE as the private data. This
1236          * is so a nodemap struct can be replaced without updating the proc
1237          * entries.
1238          */
1239         rc = lprocfs_add_vars(nm_entry->npe_proc_entry,
1240                               (is_default ? lprocfs_default_nodemap_vars :
1241                                             lprocfs_nodemap_vars),
1242                               nm_entry->npe_name);
1243         if (rc != 0)
1244                 lprocfs_remove(&nm_entry->npe_proc_entry);
1245         else
1246                 list_add(&nm_entry->npe_list_member, &nodemap_pde_list);
1247
1248 out:
1249         if (rc != 0) {
1250                 CERROR("cannot create 'nodemap/%s': rc = %d\n",
1251                        nodemap->nm_name, rc);
1252                 if (nm_entry != NULL) {
1253                         OBD_FREE_PTR(nm_entry);
1254                         nm_entry = NULL;
1255                 }
1256         }
1257
1258         nodemap->nm_pde_data = nm_entry;
1259
1260         return rc;
1261 }