fs/orangefs/super.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) 2001 Clemson University and The University of Chicago
   4  *
   5  * See COPYING in top-level directory.
   6  */
   7
   8 #include "protocol.h"
   9 #include "orangefs-kernel.h"
  10 #include "orangefs-bufmap.h"
  11
  12 #include <linux/parser.h>
  13
  14 /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
  15 static struct kmem_cache *orangefs_inode_cache;
  16
  17 /* list for storing orangefs specific superblocks in use */
  18 LIST_HEAD(orangefs_superblocks);
  19
  20 DEFINE_SPINLOCK(orangefs_superblocks_lock);
  21
  22 enum {
  23         Opt_intr,
  24         Opt_acl,
  25         Opt_local_lock,
  26
  27         Opt_err
  28 };
  29
  30 static const match_table_t tokens = {
  31         { Opt_acl,              "acl" },
  32         { Opt_intr,             "intr" },
  33         { Opt_local_lock,       "local_lock" },
  34         { Opt_err,      NULL }
  35 };
  36
  37 uint64_t orangefs_features;
  38
  39 static int orangefs_show_options(struct seq_file *m, struct dentry *root)
  40 {
  41         struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
  42
  43         if (root->d_sb->s_flags & SB_POSIXACL)
  44                 seq_puts(m, ",acl");
  45         if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
  46                 seq_puts(m, ",intr");
  47         if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
  48                 seq_puts(m, ",local_lock");
  49         return 0;
  50 }
  51
  52 static int parse_mount_options(struct super_block *sb, char *options,
  53                 int silent)
  54 {
  55         struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
  56         substring_t args[MAX_OPT_ARGS];
  57         char *p;
  58
  59         /*
  60          * Force any potential flags that might be set from the mount
  61          * to zero, ie, initialize to unset.
  62          */
  63         sb->s_flags &= ~SB_POSIXACL;
  64         orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
  65         orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
  66
  67         while ((p = strsep(&options, ",")) != NULL) {
  68                 int token;
  69
  70                 if (!*p)
  71                         continue;
  72
  73                 token = match_token(p, tokens, args);
  74                 switch (token) {
  75                 case Opt_acl:
  76                         sb->s_flags |= SB_POSIXACL;
  77                         break;
  78                 case Opt_intr:
  79                         orangefs_sb->flags |= ORANGEFS_OPT_INTR;
  80                         break;
  81                 case Opt_local_lock:
  82                         orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
  83                         break;
  84                 default:
  85                         goto fail;
  86                 }
  87         }
  88
  89         return 0;
  90 fail:
  91         if (!silent)
  92                 gossip_err("Error: mount option [%s] is not supported.\n", p);
  93         return -EINVAL;
  94 }
  95
  96 static void orangefs_inode_cache_ctor(void *req)
  97 {
  98         struct orangefs_inode_s *orangefs_inode = req;
  99
 100         inode_init_once(&orangefs_inode->vfs_inode);
 101         init_rwsem(&orangefs_inode->xattr_sem);
 102 }
 103
 104 static struct inode *orangefs_alloc_inode(struct super_block *sb)
 105 {
 106         struct orangefs_inode_s *orangefs_inode;
 107
 108         orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL);
 109         if (!orangefs_inode)
 110                 return NULL;
 111
 112         /*
 113          * We want to clear everything except for rw_semaphore and the
 114          * vfs_inode.
 115          */
 116         memset(&orangefs_inode->refn.khandle, 0, 16);
 117         orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
 118         orangefs_inode->last_failed_block_index_read = 0;
 119         memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
 120
 121         gossip_debug(GOSSIP_SUPER_DEBUG,
 122                      "orangefs_alloc_inode: allocated %p\n",
 123                      &orangefs_inode->vfs_inode);
 124         return &orangefs_inode->vfs_inode;
 125 }
 126
 127 static void orangefs_i_callback(struct rcu_head *head)
 128 {
 129         struct inode *inode = container_of(head, struct inode, i_rcu);
 130         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 131         kmem_cache_free(orangefs_inode_cache, orangefs_inode);
 132 }
 133
 134 static void orangefs_destroy_inode(struct inode *inode)
 135 {
 136         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 137
 138         gossip_debug(GOSSIP_SUPER_DEBUG,
 139                         "%s: deallocated %p destroying inode %pU\n",
 140                         __func__, orangefs_inode, get_khandle_from_ino(inode));
 141
 142         call_rcu(&inode->i_rcu, orangefs_i_callback);
 143 }
 144
 145 /*
 146  * NOTE: information filled in here is typically reflected in the
 147  * output of the system command 'df'
 148 */
 149 static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
 150 {
 151         int ret = -ENOMEM;
 152         struct orangefs_kernel_op_s *new_op = NULL;
 153         int flags = 0;
 154         struct super_block *sb = NULL;
 155
 156         sb = dentry->d_sb;
 157
 158         gossip_debug(GOSSIP_SUPER_DEBUG,
 159                         "%s: called on sb %p (fs_id is %d)\n",
 160                         __func__,
 161                         sb,
 162                         (int)(ORANGEFS_SB(sb)->fs_id));
 163
 164         new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
 165         if (!new_op)
 166                 return ret;
 167         new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
 168
 169         if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
 170                 flags = ORANGEFS_OP_INTERRUPTIBLE;
 171
 172         ret = service_operation(new_op, "orangefs_statfs", flags);
 173
 174         if (new_op->downcall.status < 0)
 175                 goto out_op_release;
 176
 177         gossip_debug(GOSSIP_SUPER_DEBUG,
 178                      "%s: got %ld blocks available | "
 179                      "%ld blocks total | %ld block size | "
 180                      "%ld files total | %ld files avail\n",
 181                      __func__,
 182                      (long)new_op->downcall.resp.statfs.blocks_avail,
 183                      (long)new_op->downcall.resp.statfs.blocks_total,
 184                      (long)new_op->downcall.resp.statfs.block_size,
 185                      (long)new_op->downcall.resp.statfs.files_total,
 186                      (long)new_op->downcall.resp.statfs.files_avail);
 187
 188         buf->f_type = sb->s_magic;
 189         memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
 190         buf->f_bsize = new_op->downcall.resp.statfs.block_size;
 191         buf->f_namelen = ORANGEFS_NAME_MAX;
 192
 193         buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
 194         buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
 195         buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
 196         buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
 197         buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
 198         buf->f_frsize = sb->s_blocksize;
 199
 200 out_op_release:
 201         op_release(new_op);
 202         gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
 203         return ret;
 204 }
 205
 206 /*
 207  * Remount as initiated by VFS layer.  We just need to reparse the mount
 208  * options, no need to signal pvfs2-client-core about it.
 209  */
 210 static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
 211 {
 212         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
 213         return parse_mount_options(sb, data, 1);
 214 }
 215
 216 /*
 217  * Remount as initiated by pvfs2-client-core on restart.  This is used to
 218  * repopulate mount information left from previous pvfs2-client-core.
 219  *
 220  * the idea here is that given a valid superblock, we're
 221  * re-initializing the user space client with the initial mount
 222  * information specified when the super block was first initialized.
 223  * this is very different than the first initialization/creation of a
 224  * superblock.  we use the special service_priority_operation to make
 225  * sure that the mount gets ahead of any other pending operation that
 226  * is waiting for servicing.  this means that the pvfs2-client won't
 227  * fail to start several times for all other pending operations before
 228  * the client regains all of the mount information from us.
 229  * NOTE: this function assumes that the request_mutex is already acquired!
 230  */
 231 int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
 232 {
 233         struct orangefs_kernel_op_s *new_op;
 234         int ret = -EINVAL;
 235
 236         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
 237
 238         new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
 239         if (!new_op)
 240                 return -ENOMEM;
 241         strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
 242                 orangefs_sb->devname,
 243                 ORANGEFS_MAX_SERVER_ADDR_LEN);
 244
 245         gossip_debug(GOSSIP_SUPER_DEBUG,
 246                      "Attempting ORANGEFS Remount via host %s\n",
 247                      new_op->upcall.req.fs_mount.orangefs_config_server);
 248
 249         /*
 250          * we assume that the calling function has already acquired the
 251          * request_mutex to prevent other operations from bypassing
 252          * this one
 253          */
 254         ret = service_operation(new_op, "orangefs_remount",
 255                 ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
 256         gossip_debug(GOSSIP_SUPER_DEBUG,
 257                      "orangefs_remount: mount got return value of %d\n",
 258                      ret);
 259         if (ret == 0) {
 260                 /*
 261                  * store the id assigned to this sb -- it's just a
 262                  * short-lived mapping that the system interface uses
 263                  * to map this superblock to a particular mount entry
 264                  */
 265                 orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
 266                 orangefs_sb->mount_pending = 0;
 267         }
 268
 269         op_release(new_op);
 270
 271         if (orangefs_userspace_version >= 20906) {
 272                 new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
 273                 if (!new_op)
 274                         return -ENOMEM;
 275                 new_op->upcall.req.features.features = 0;
 276                 ret = service_operation(new_op, "orangefs_features",
 277                     ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
 278                 if (!ret)
 279                         orangefs_features =
 280                             new_op->downcall.resp.features.features;
 281                 else
 282                         orangefs_features = 0;
 283                 op_release(new_op);
 284         } else {
 285                 orangefs_features = 0;
 286         }
 287
 288         return ret;
 289 }
 290
 291 int fsid_key_table_initialize(void)
 292 {
 293         return 0;
 294 }
 295
 296 void fsid_key_table_finalize(void)
 297 {
 298 }
 299
 300 static const struct super_operations orangefs_s_ops = {
 301         .alloc_inode = orangefs_alloc_inode,
 302         .destroy_inode = orangefs_destroy_inode,
 303         .drop_inode = generic_delete_inode,
 304         .statfs = orangefs_statfs,
 305         .remount_fs = orangefs_remount_fs,
 306         .show_options = orangefs_show_options,
 307 };
 308
 309 static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
 310                                   struct fid *fid,
 311                                   int fh_len,
 312                                   int fh_type)
 313 {
 314         struct orangefs_object_kref refn;
 315
 316         if (fh_len < 5 || fh_type > 2)
 317                 return NULL;
 318
 319         ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
 320         refn.fs_id = (u32) fid->raw[4];
 321         gossip_debug(GOSSIP_SUPER_DEBUG,
 322                      "fh_to_dentry: handle %pU, fs_id %d\n",
 323                      &refn.khandle,
 324                      refn.fs_id);
 325
 326         return d_obtain_alias(orangefs_iget(sb, &refn));
 327 }
 328
 329 static int orangefs_encode_fh(struct inode *inode,
 330                     __u32 *fh,
 331                     int *max_len,
 332                     struct inode *parent)
 333 {
 334         int len = parent ? 10 : 5;
 335         int type = 1;
 336         struct orangefs_object_kref refn;
 337
 338         if (*max_len < len) {
 339                 gossip_err("fh buffer is too small for encoding\n");
 340                 *max_len = len;
 341                 type = 255;
 342                 goto out;
 343         }
 344
 345         refn = ORANGEFS_I(inode)->refn;
 346         ORANGEFS_khandle_to(&refn.khandle, fh, 16);
 347         fh[4] = refn.fs_id;
 348
 349         gossip_debug(GOSSIP_SUPER_DEBUG,
 350                      "Encoding fh: handle %pU, fsid %u\n",
 351                      &refn.khandle,
 352                      refn.fs_id);
 353
 354
 355         if (parent) {
 356                 refn = ORANGEFS_I(parent)->refn;
 357                 ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
 358                 fh[9] = refn.fs_id;
 359
 360                 type = 2;
 361                 gossip_debug(GOSSIP_SUPER_DEBUG,
 362                              "Encoding parent: handle %pU, fsid %u\n",
 363                              &refn.khandle,
 364                              refn.fs_id);
 365         }
 366         *max_len = len;
 367
 368 out:
 369         return type;
 370 }
 371
 372 static const struct export_operations orangefs_export_ops = {
 373         .encode_fh = orangefs_encode_fh,
 374         .fh_to_dentry = orangefs_fh_to_dentry,
 375 };
 376
 377 static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
 378 {
 379         struct orangefs_kernel_op_s *op;
 380         int r;
 381         op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
 382         if (!op)
 383                 return -ENOMEM;
 384         op->upcall.req.fs_umount.id = id;
 385         op->upcall.req.fs_umount.fs_id = fs_id;
 386         strncpy(op->upcall.req.fs_umount.orangefs_config_server,
 387             devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 388         r = service_operation(op, "orangefs_fs_umount", 0);
 389         /* Not much to do about an error here. */
 390         if (r)
 391                 gossip_err("orangefs_unmount: service_operation %d\n", r);
 392         op_release(op);
 393         return r;
 394 }
 395
 396 static int orangefs_fill_sb(struct super_block *sb,
 397                 struct orangefs_fs_mount_response *fs_mount,
 398                 void *data, int silent)
 399 {
 400         int ret = -EINVAL;
 401         struct inode *root = NULL;
 402         struct dentry *root_dentry = NULL;
 403         struct orangefs_object_kref root_object;
 404
 405         /* alloc and init our private orangefs sb info */
 406         sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
 407         if (!ORANGEFS_SB(sb))
 408                 return -ENOMEM;
 409         ORANGEFS_SB(sb)->sb = sb;
 410
 411         ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
 412         ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
 413         ORANGEFS_SB(sb)->id = fs_mount->id;
 414
 415         if (data) {
 416                 ret = parse_mount_options(sb, data, silent);
 417                 if (ret)
 418                         return ret;
 419         }
 420
 421         /* Hang the xattr handlers off the superblock */
 422         sb->s_xattr = orangefs_xattr_handlers;
 423         sb->s_magic = ORANGEFS_SUPER_MAGIC;
 424         sb->s_op = &orangefs_s_ops;
 425         sb->s_d_op = &orangefs_dentry_operations;
 426
 427         sb->s_blocksize = PAGE_SIZE;
 428         sb->s_blocksize_bits = PAGE_SHIFT;
 429         sb->s_maxbytes = MAX_LFS_FILESIZE;
 430
 431         root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
 432         root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
 433         gossip_debug(GOSSIP_SUPER_DEBUG,
 434                      "get inode %pU, fsid %d\n",
 435                      &root_object.khandle,
 436                      root_object.fs_id);
 437
 438         root = orangefs_iget(sb, &root_object);
 439         if (IS_ERR(root))
 440                 return PTR_ERR(root);
 441
 442         gossip_debug(GOSSIP_SUPER_DEBUG,
 443                      "Allocated root inode [%p] with mode %x\n",
 444                      root,
 445                      root->i_mode);
 446
 447         /* allocates and places root dentry in dcache */
 448         root_dentry = d_make_root(root);
 449         if (!root_dentry)
 450                 return -ENOMEM;
 451
 452         sb->s_export_op = &orangefs_export_ops;
 453         sb->s_root = root_dentry;
 454         return 0;
 455 }
 456
 457 struct dentry *orangefs_mount(struct file_system_type *fst,
 458                            int flags,
 459                            const char *devname,
 460                            void *data)
 461 {
 462         int ret = -EINVAL;
 463         struct super_block *sb = ERR_PTR(-EINVAL);
 464         struct orangefs_kernel_op_s *new_op;
 465         struct dentry *d = ERR_PTR(-EINVAL);
 466
 467         gossip_debug(GOSSIP_SUPER_DEBUG,
 468                      "orangefs_mount: called with devname %s\n",
 469                      devname);
 470
 471         if (!devname) {
 472                 gossip_err("ERROR: device name not specified.\n");
 473                 return ERR_PTR(-EINVAL);
 474         }
 475
 476         new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
 477         if (!new_op)
 478                 return ERR_PTR(-ENOMEM);
 479
 480         strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
 481                 devname,
 482                 ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 483
 484         gossip_debug(GOSSIP_SUPER_DEBUG,
 485                      "Attempting ORANGEFS Mount via host %s\n",
 486                      new_op->upcall.req.fs_mount.orangefs_config_server);
 487
 488         ret = service_operation(new_op, "orangefs_mount", 0);
 489         gossip_debug(GOSSIP_SUPER_DEBUG,
 490                      "orangefs_mount: mount got return value of %d\n", ret);
 491         if (ret)
 492                 goto free_op;
 493
 494         if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
 495                 gossip_err("ERROR: Retrieved null fs_id\n");
 496                 ret = -EINVAL;
 497                 goto free_op;
 498         }
 499
 500         sb = sget(fst, NULL, set_anon_super, flags, NULL);
 501
 502         if (IS_ERR(sb)) {
 503                 d = ERR_CAST(sb);
 504                 orangefs_unmount(new_op->downcall.resp.fs_mount.id,
 505                     new_op->downcall.resp.fs_mount.fs_id, devname);
 506                 goto free_op;
 507         }
 508
 509         ret = orangefs_fill_sb(sb,
 510               &new_op->downcall.resp.fs_mount, data,
 511               flags & SB_SILENT ? 1 : 0);
 512
 513         if (ret) {
 514                 d = ERR_PTR(ret);
 515                 goto free_sb_and_op;
 516         }
 517
 518         /*
 519          * on successful mount, store the devname and data
 520          * used
 521          */
 522         strncpy(ORANGEFS_SB(sb)->devname,
 523                 devname,
 524                 ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 525
 526         /* mount_pending must be cleared */
 527         ORANGEFS_SB(sb)->mount_pending = 0;
 528
 529         /*
 530          * finally, add this sb to our list of known orangefs
 531          * sb's
 532          */
 533         gossip_debug(GOSSIP_SUPER_DEBUG,
 534                      "Adding SB %p to orangefs superblocks\n",
 535                      ORANGEFS_SB(sb));
 536         spin_lock(&orangefs_superblocks_lock);
 537         list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
 538         spin_unlock(&orangefs_superblocks_lock);
 539         op_release(new_op);
 540
 541         /* Must be removed from the list now. */
 542         ORANGEFS_SB(sb)->no_list = 0;
 543
 544         if (orangefs_userspace_version >= 20906) {
 545                 new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
 546                 if (!new_op)
 547                         return ERR_PTR(-ENOMEM);
 548                 new_op->upcall.req.features.features = 0;
 549                 ret = service_operation(new_op, "orangefs_features", 0);
 550                 orangefs_features = new_op->downcall.resp.features.features;
 551                 op_release(new_op);
 552         } else {
 553                 orangefs_features = 0;
 554         }
 555
 556         return dget(sb->s_root);
 557
 558 free_sb_and_op:
 559         /* Will call orangefs_kill_sb with sb not in list. */
 560         ORANGEFS_SB(sb)->no_list = 1;
 561         /* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
 562         deactivate_locked_super(sb);
 563 free_op:
 564         gossip_err("orangefs_mount: mount request failed with %d\n", ret);
 565         if (ret == -EINVAL) {
 566                 gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
 567                 gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
 568         }
 569
 570         op_release(new_op);
 571
 572         return d;
 573 }
 574
 575 void orangefs_kill_sb(struct super_block *sb)
 576 {
 577         int r;
 578         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
 579
 580         /* provided sb cleanup */
 581         kill_anon_super(sb);
 582
 583         if (!ORANGEFS_SB(sb)) {
 584                 mutex_lock(&orangefs_request_mutex);
 585                 mutex_unlock(&orangefs_request_mutex);
 586                 return;
 587         }
 588         /*
 589          * issue the unmount to userspace to tell it to remove the
 590          * dynamic mount info it has for this superblock
 591          */
 592         r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
 593             ORANGEFS_SB(sb)->devname);
 594         if (!r)
 595                 ORANGEFS_SB(sb)->mount_pending = 1;
 596
 597         if (!ORANGEFS_SB(sb)->no_list) {
 598                 /* remove the sb from our list of orangefs specific sb's */
 599                 spin_lock(&orangefs_superblocks_lock);
 600                 /* not list_del_init */
 601                 __list_del_entry(&ORANGEFS_SB(sb)->list);
 602                 ORANGEFS_SB(sb)->list.prev = NULL;
 603                 spin_unlock(&orangefs_superblocks_lock);
 604         }
 605
 606         /*
 607          * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
 608          * gets completed before we free the dang thing.
 609          */
 610         mutex_lock(&orangefs_request_mutex);
 611         mutex_unlock(&orangefs_request_mutex);
 612
 613         /* free the orangefs superblock private data */
 614         kfree(ORANGEFS_SB(sb));
 615 }
 616
 617 int orangefs_inode_cache_initialize(void)
 618 {
 619         orangefs_inode_cache = kmem_cache_create_usercopy(
 620                                         "orangefs_inode_cache",
 621                                         sizeof(struct orangefs_inode_s),
 622                                         0,
 623                                         ORANGEFS_CACHE_CREATE_FLAGS,
 624                                         offsetof(struct orangefs_inode_s,
 625                                                 link_target),
 626                                         sizeof_field(struct orangefs_inode_s,
 627                                                 link_target),
 628                                         orangefs_inode_cache_ctor);
 629
 630         if (!orangefs_inode_cache) {
 631                 gossip_err("Cannot create orangefs_inode_cache\n");
 632                 return -ENOMEM;
 633         }
 634         return 0;
 635 }
 636
 637 int orangefs_inode_cache_finalize(void)
 638 {
 639         kmem_cache_destroy(orangefs_inode_cache);
 640         return 0;
 641 }