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 #include <linux/hashtable.h>
  14
  15 /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
  16 static struct kmem_cache *orangefs_inode_cache;
  17
  18 /* list for storing orangefs specific superblocks in use */
  19 LIST_HEAD(orangefs_superblocks);
  20
  21 DEFINE_SPINLOCK(orangefs_superblocks_lock);
  22
  23 enum {
  24         Opt_intr,
  25         Opt_acl,
  26         Opt_local_lock,
  27
  28         Opt_err
  29 };
  30
  31 static const match_table_t tokens = {
  32         { Opt_acl,              "acl" },
  33         { Opt_intr,             "intr" },
  34         { Opt_local_lock,       "local_lock" },
  35         { Opt_err,      NULL }
  36 };
  37
  38 uint64_t orangefs_features;
  39
  40 static int orangefs_show_options(struct seq_file *m, struct dentry *root)
  41 {
  42         struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
  43
  44         if (root->d_sb->s_flags & SB_POSIXACL)
  45                 seq_puts(m, ",acl");
  46         if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
  47                 seq_puts(m, ",intr");
  48         if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
  49                 seq_puts(m, ",local_lock");
  50         return 0;
  51 }
  52
  53 static int parse_mount_options(struct super_block *sb, char *options,
  54                 int silent)
  55 {
  56         struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
  57         substring_t args[MAX_OPT_ARGS];
  58         char *p;
  59
  60         /*
  61          * Force any potential flags that might be set from the mount
  62          * to zero, ie, initialize to unset.
  63          */
  64         sb->s_flags &= ~SB_POSIXACL;
  65         orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
  66         orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
  67
  68         while ((p = strsep(&options, ",")) != NULL) {
  69                 int token;
  70
  71                 if (!*p)
  72                         continue;
  73
  74                 token = match_token(p, tokens, args);
  75                 switch (token) {
  76                 case Opt_acl:
  77                         sb->s_flags |= SB_POSIXACL;
  78                         break;
  79                 case Opt_intr:
  80                         orangefs_sb->flags |= ORANGEFS_OPT_INTR;
  81                         break;
  82                 case Opt_local_lock:
  83                         orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
  84                         break;
  85                 default:
  86                         goto fail;
  87                 }
  88         }
  89
  90         return 0;
  91 fail:
  92         if (!silent)
  93                 gossip_err("Error: mount option [%s] is not supported.\n", p);
  94         return -EINVAL;
  95 }
  96
  97 static void orangefs_inode_cache_ctor(void *req)
  98 {
  99         struct orangefs_inode_s *orangefs_inode = req;
 100
 101         inode_init_once(&orangefs_inode->vfs_inode);
 102         init_rwsem(&orangefs_inode->xattr_sem);
 103 }
 104
 105 static struct inode *orangefs_alloc_inode(struct super_block *sb)
 106 {
 107         struct orangefs_inode_s *orangefs_inode;
 108
 109         orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL);
 110         if (!orangefs_inode)
 111                 return NULL;
 112
 113         /*
 114          * We want to clear everything except for rw_semaphore and the
 115          * vfs_inode.
 116          */
 117         memset(&orangefs_inode->refn.khandle, 0, 16);
 118         orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
 119         orangefs_inode->last_failed_block_index_read = 0;
 120         memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
 121
 122         gossip_debug(GOSSIP_SUPER_DEBUG,
 123                      "orangefs_alloc_inode: allocated %p\n",
 124                      &orangefs_inode->vfs_inode);
 125         return &orangefs_inode->vfs_inode;
 126 }
 127
 128 static void orangefs_i_callback(struct rcu_head *head)
 129 {
 130         struct inode *inode = container_of(head, struct inode, i_rcu);
 131         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 132         struct orangefs_cached_xattr *cx;
 133         struct hlist_node *tmp;
 134         int i;
 135
 136         hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) {
 137                 hlist_del(&cx->node);
 138                 kfree(cx);
 139         }
 140
 141         kmem_cache_free(orangefs_inode_cache, orangefs_inode);
 142 }
 143
 144 static void orangefs_destroy_inode(struct inode *inode)
 145 {
 146         struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 147
 148         gossip_debug(GOSSIP_SUPER_DEBUG,
 149                         "%s: deallocated %p destroying inode %pU\n",
 150                         __func__, orangefs_inode, get_khandle_from_ino(inode));
 151
 152         call_rcu(&inode->i_rcu, orangefs_i_callback);
 153 }
 154
 155 static int orangefs_write_inode(struct inode *inode,
 156                                 struct writeback_control *wbc)
 157 {
 158         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n");
 159         return orangefs_inode_setattr(inode);
 160 }
 161
 162 /*
 163  * NOTE: information filled in here is typically reflected in the
 164  * output of the system command 'df'
 165 */
 166 static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
 167 {
 168         int ret = -ENOMEM;
 169         struct orangefs_kernel_op_s *new_op = NULL;
 170         int flags = 0;
 171         struct super_block *sb = NULL;
 172
 173         sb = dentry->d_sb;
 174
 175         gossip_debug(GOSSIP_SUPER_DEBUG,
 176                         "%s: called on sb %p (fs_id is %d)\n",
 177                         __func__,
 178                         sb,
 179                         (int)(ORANGEFS_SB(sb)->fs_id));
 180
 181         new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
 182         if (!new_op)
 183                 return ret;
 184         new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
 185
 186         if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
 187                 flags = ORANGEFS_OP_INTERRUPTIBLE;
 188
 189         ret = service_operation(new_op, "orangefs_statfs", flags);
 190
 191         if (new_op->downcall.status < 0)
 192                 goto out_op_release;
 193
 194         gossip_debug(GOSSIP_SUPER_DEBUG,
 195                      "%s: got %ld blocks available | "
 196                      "%ld blocks total | %ld block size | "
 197                      "%ld files total | %ld files avail\n",
 198                      __func__,
 199                      (long)new_op->downcall.resp.statfs.blocks_avail,
 200                      (long)new_op->downcall.resp.statfs.blocks_total,
 201                      (long)new_op->downcall.resp.statfs.block_size,
 202                      (long)new_op->downcall.resp.statfs.files_total,
 203                      (long)new_op->downcall.resp.statfs.files_avail);
 204
 205         buf->f_type = sb->s_magic;
 206         memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
 207         buf->f_bsize = new_op->downcall.resp.statfs.block_size;
 208         buf->f_namelen = ORANGEFS_NAME_MAX;
 209
 210         buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
 211         buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
 212         buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
 213         buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
 214         buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
 215         buf->f_frsize = sb->s_blocksize;
 216
 217 out_op_release:
 218         op_release(new_op);
 219         gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
 220         return ret;
 221 }
 222
 223 /*
 224  * Remount as initiated by VFS layer.  We just need to reparse the mount
 225  * options, no need to signal pvfs2-client-core about it.
 226  */
 227 static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
 228 {
 229         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
 230         return parse_mount_options(sb, data, 1);
 231 }
 232
 233 /*
 234  * Remount as initiated by pvfs2-client-core on restart.  This is used to
 235  * repopulate mount information left from previous pvfs2-client-core.
 236  *
 237  * the idea here is that given a valid superblock, we're
 238  * re-initializing the user space client with the initial mount
 239  * information specified when the super block was first initialized.
 240  * this is very different than the first initialization/creation of a
 241  * superblock.  we use the special service_priority_operation to make
 242  * sure that the mount gets ahead of any other pending operation that
 243  * is waiting for servicing.  this means that the pvfs2-client won't
 244  * fail to start several times for all other pending operations before
 245  * the client regains all of the mount information from us.
 246  * NOTE: this function assumes that the request_mutex is already acquired!
 247  */
 248 int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
 249 {
 250         struct orangefs_kernel_op_s *new_op;
 251         int ret = -EINVAL;
 252
 253         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
 254
 255         new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
 256         if (!new_op)
 257                 return -ENOMEM;
 258         strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
 259                 orangefs_sb->devname,
 260                 ORANGEFS_MAX_SERVER_ADDR_LEN);
 261
 262         gossip_debug(GOSSIP_SUPER_DEBUG,
 263                      "Attempting ORANGEFS Remount via host %s\n",
 264                      new_op->upcall.req.fs_mount.orangefs_config_server);
 265
 266         /*
 267          * we assume that the calling function has already acquired the
 268          * request_mutex to prevent other operations from bypassing
 269          * this one
 270          */
 271         ret = service_operation(new_op, "orangefs_remount",
 272                 ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
 273         gossip_debug(GOSSIP_SUPER_DEBUG,
 274                      "orangefs_remount: mount got return value of %d\n",
 275                      ret);
 276         if (ret == 0) {
 277                 /*
 278                  * store the id assigned to this sb -- it's just a
 279                  * short-lived mapping that the system interface uses
 280                  * to map this superblock to a particular mount entry
 281                  */
 282                 orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
 283                 orangefs_sb->mount_pending = 0;
 284         }
 285
 286         op_release(new_op);
 287
 288         if (orangefs_userspace_version >= 20906) {
 289                 new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
 290                 if (!new_op)
 291                         return -ENOMEM;
 292                 new_op->upcall.req.features.features = 0;
 293                 ret = service_operation(new_op, "orangefs_features",
 294                     ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
 295                 if (!ret)
 296                         orangefs_features =
 297                             new_op->downcall.resp.features.features;
 298                 else
 299                         orangefs_features = 0;
 300                 op_release(new_op);
 301         } else {
 302                 orangefs_features = 0;
 303         }
 304
 305         return ret;
 306 }
 307
 308 int fsid_key_table_initialize(void)
 309 {
 310         return 0;
 311 }
 312
 313 void fsid_key_table_finalize(void)
 314 {
 315 }
 316
 317 static const struct super_operations orangefs_s_ops = {
 318         .alloc_inode = orangefs_alloc_inode,
 319         .destroy_inode = orangefs_destroy_inode,
 320         .write_inode = orangefs_write_inode,
 321         .drop_inode = generic_delete_inode,
 322         .statfs = orangefs_statfs,
 323         .remount_fs = orangefs_remount_fs,
 324         .show_options = orangefs_show_options,
 325 };
 326
 327 static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
 328                                   struct fid *fid,
 329                                   int fh_len,
 330                                   int fh_type)
 331 {
 332         struct orangefs_object_kref refn;
 333
 334         if (fh_len < 5 || fh_type > 2)
 335                 return NULL;
 336
 337         ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
 338         refn.fs_id = (u32) fid->raw[4];
 339         gossip_debug(GOSSIP_SUPER_DEBUG,
 340                      "fh_to_dentry: handle %pU, fs_id %d\n",
 341                      &refn.khandle,
 342                      refn.fs_id);
 343
 344         return d_obtain_alias(orangefs_iget(sb, &refn));
 345 }
 346
 347 static int orangefs_encode_fh(struct inode *inode,
 348                     __u32 *fh,
 349                     int *max_len,
 350                     struct inode *parent)
 351 {
 352         int len = parent ? 10 : 5;
 353         int type = 1;
 354         struct orangefs_object_kref refn;
 355
 356         if (*max_len < len) {
 357                 gossip_err("fh buffer is too small for encoding\n");
 358                 *max_len = len;
 359                 type = 255;
 360                 goto out;
 361         }
 362
 363         refn = ORANGEFS_I(inode)->refn;
 364         ORANGEFS_khandle_to(&refn.khandle, fh, 16);
 365         fh[4] = refn.fs_id;
 366
 367         gossip_debug(GOSSIP_SUPER_DEBUG,
 368                      "Encoding fh: handle %pU, fsid %u\n",
 369                      &refn.khandle,
 370                      refn.fs_id);
 371
 372
 373         if (parent) {
 374                 refn = ORANGEFS_I(parent)->refn;
 375                 ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
 376                 fh[9] = refn.fs_id;
 377
 378                 type = 2;
 379                 gossip_debug(GOSSIP_SUPER_DEBUG,
 380                              "Encoding parent: handle %pU, fsid %u\n",
 381                              &refn.khandle,
 382                              refn.fs_id);
 383         }
 384         *max_len = len;
 385
 386 out:
 387         return type;
 388 }
 389
 390 static const struct export_operations orangefs_export_ops = {
 391         .encode_fh = orangefs_encode_fh,
 392         .fh_to_dentry = orangefs_fh_to_dentry,
 393 };
 394
 395 static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
 396 {
 397         struct orangefs_kernel_op_s *op;
 398         int r;
 399         op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
 400         if (!op)
 401                 return -ENOMEM;
 402         op->upcall.req.fs_umount.id = id;
 403         op->upcall.req.fs_umount.fs_id = fs_id;
 404         strncpy(op->upcall.req.fs_umount.orangefs_config_server,
 405             devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 406         r = service_operation(op, "orangefs_fs_umount", 0);
 407         /* Not much to do about an error here. */
 408         if (r)
 409                 gossip_err("orangefs_unmount: service_operation %d\n", r);
 410         op_release(op);
 411         return r;
 412 }
 413
 414 static int orangefs_fill_sb(struct super_block *sb,
 415                 struct orangefs_fs_mount_response *fs_mount,
 416                 void *data, int silent)
 417 {
 418         int ret;
 419         struct inode *root;
 420         struct dentry *root_dentry;
 421         struct orangefs_object_kref root_object;
 422
 423         ORANGEFS_SB(sb)->sb = sb;
 424
 425         ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
 426         ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
 427         ORANGEFS_SB(sb)->id = fs_mount->id;
 428
 429         if (data) {
 430                 ret = parse_mount_options(sb, data, silent);
 431                 if (ret)
 432                         return ret;
 433         }
 434
 435         /* Hang the xattr handlers off the superblock */
 436         sb->s_xattr = orangefs_xattr_handlers;
 437         sb->s_magic = ORANGEFS_SUPER_MAGIC;
 438         sb->s_op = &orangefs_s_ops;
 439         sb->s_d_op = &orangefs_dentry_operations;
 440
 441         sb->s_blocksize = PAGE_SIZE;
 442         sb->s_blocksize_bits = PAGE_SHIFT;
 443         sb->s_maxbytes = MAX_LFS_FILESIZE;
 444
 445         ret = super_setup_bdi(sb);
 446         if (ret)
 447                 return ret;
 448
 449         root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
 450         root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
 451         gossip_debug(GOSSIP_SUPER_DEBUG,
 452                      "get inode %pU, fsid %d\n",
 453                      &root_object.khandle,
 454                      root_object.fs_id);
 455
 456         root = orangefs_iget(sb, &root_object);
 457         if (IS_ERR(root))
 458                 return PTR_ERR(root);
 459
 460         gossip_debug(GOSSIP_SUPER_DEBUG,
 461                      "Allocated root inode [%p] with mode %x\n",
 462                      root,
 463                      root->i_mode);
 464
 465         /* allocates and places root dentry in dcache */
 466         root_dentry = d_make_root(root);
 467         if (!root_dentry)
 468                 return -ENOMEM;
 469
 470         sb->s_export_op = &orangefs_export_ops;
 471         sb->s_root = root_dentry;
 472         return 0;
 473 }
 474
 475 struct dentry *orangefs_mount(struct file_system_type *fst,
 476                            int flags,
 477                            const char *devname,
 478                            void *data)
 479 {
 480         int ret = -EINVAL;
 481         struct super_block *sb = ERR_PTR(-EINVAL);
 482         struct orangefs_kernel_op_s *new_op;
 483         struct dentry *d = ERR_PTR(-EINVAL);
 484
 485         gossip_debug(GOSSIP_SUPER_DEBUG,
 486                      "orangefs_mount: called with devname %s\n",
 487                      devname);
 488
 489         if (!devname) {
 490                 gossip_err("ERROR: device name not specified.\n");
 491                 return ERR_PTR(-EINVAL);
 492         }
 493
 494         new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
 495         if (!new_op)
 496                 return ERR_PTR(-ENOMEM);
 497
 498         strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
 499                 devname,
 500                 ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 501
 502         gossip_debug(GOSSIP_SUPER_DEBUG,
 503                      "Attempting ORANGEFS Mount via host %s\n",
 504                      new_op->upcall.req.fs_mount.orangefs_config_server);
 505
 506         ret = service_operation(new_op, "orangefs_mount", 0);
 507         gossip_debug(GOSSIP_SUPER_DEBUG,
 508                      "orangefs_mount: mount got return value of %d\n", ret);
 509         if (ret)
 510                 goto free_op;
 511
 512         if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
 513                 gossip_err("ERROR: Retrieved null fs_id\n");
 514                 ret = -EINVAL;
 515                 goto free_op;
 516         }
 517
 518         sb = sget(fst, NULL, set_anon_super, flags, NULL);
 519
 520         if (IS_ERR(sb)) {
 521                 d = ERR_CAST(sb);
 522                 orangefs_unmount(new_op->downcall.resp.fs_mount.id,
 523                     new_op->downcall.resp.fs_mount.fs_id, devname);
 524                 goto free_op;
 525         }
 526
 527         /* alloc and init our private orangefs sb info */
 528         sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
 529         if (!ORANGEFS_SB(sb)) {
 530                 d = ERR_PTR(-ENOMEM);
 531                 goto free_op;
 532         }
 533
 534         ret = orangefs_fill_sb(sb,
 535               &new_op->downcall.resp.fs_mount, data,
 536               flags & SB_SILENT ? 1 : 0);
 537
 538         if (ret) {
 539                 d = ERR_PTR(ret);
 540                 goto free_sb_and_op;
 541         }
 542
 543         /*
 544          * on successful mount, store the devname and data
 545          * used
 546          */
 547         strncpy(ORANGEFS_SB(sb)->devname,
 548                 devname,
 549                 ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
 550
 551         /* mount_pending must be cleared */
 552         ORANGEFS_SB(sb)->mount_pending = 0;
 553
 554         /*
 555          * finally, add this sb to our list of known orangefs
 556          * sb's
 557          */
 558         gossip_debug(GOSSIP_SUPER_DEBUG,
 559                      "Adding SB %p to orangefs superblocks\n",
 560                      ORANGEFS_SB(sb));
 561         spin_lock(&orangefs_superblocks_lock);
 562         list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
 563         spin_unlock(&orangefs_superblocks_lock);
 564         op_release(new_op);
 565
 566         /* Must be removed from the list now. */
 567         ORANGEFS_SB(sb)->no_list = 0;
 568
 569         if (orangefs_userspace_version >= 20906) {
 570                 new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
 571                 if (!new_op)
 572                         return ERR_PTR(-ENOMEM);
 573                 new_op->upcall.req.features.features = 0;
 574                 ret = service_operation(new_op, "orangefs_features", 0);
 575                 orangefs_features = new_op->downcall.resp.features.features;
 576                 op_release(new_op);
 577         } else {
 578                 orangefs_features = 0;
 579         }
 580
 581         return dget(sb->s_root);
 582
 583 free_sb_and_op:
 584         /* Will call orangefs_kill_sb with sb not in list. */
 585         ORANGEFS_SB(sb)->no_list = 1;
 586         /* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
 587         deactivate_locked_super(sb);
 588 free_op:
 589         gossip_err("orangefs_mount: mount request failed with %d\n", ret);
 590         if (ret == -EINVAL) {
 591                 gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
 592                 gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
 593         }
 594
 595         op_release(new_op);
 596
 597         return d;
 598 }
 599
 600 void orangefs_kill_sb(struct super_block *sb)
 601 {
 602         int r;
 603         gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
 604
 605         /* provided sb cleanup */
 606         kill_anon_super(sb);
 607
 608         if (!ORANGEFS_SB(sb)) {
 609                 mutex_lock(&orangefs_request_mutex);
 610                 mutex_unlock(&orangefs_request_mutex);
 611                 return;
 612         }
 613         /*
 614          * issue the unmount to userspace to tell it to remove the
 615          * dynamic mount info it has for this superblock
 616          */
 617         r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
 618             ORANGEFS_SB(sb)->devname);
 619         if (!r)
 620                 ORANGEFS_SB(sb)->mount_pending = 1;
 621
 622         if (!ORANGEFS_SB(sb)->no_list) {
 623                 /* remove the sb from our list of orangefs specific sb's */
 624                 spin_lock(&orangefs_superblocks_lock);
 625                 /* not list_del_init */
 626                 __list_del_entry(&ORANGEFS_SB(sb)->list);
 627                 ORANGEFS_SB(sb)->list.prev = NULL;
 628                 spin_unlock(&orangefs_superblocks_lock);
 629         }
 630
 631         /*
 632          * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
 633          * gets completed before we free the dang thing.
 634          */
 635         mutex_lock(&orangefs_request_mutex);
 636         mutex_unlock(&orangefs_request_mutex);
 637
 638         /* free the orangefs superblock private data */
 639         kfree(ORANGEFS_SB(sb));
 640 }
 641
 642 int orangefs_inode_cache_initialize(void)
 643 {
 644         orangefs_inode_cache = kmem_cache_create_usercopy(
 645                                         "orangefs_inode_cache",
 646                                         sizeof(struct orangefs_inode_s),
 647                                         0,
 648                                         ORANGEFS_CACHE_CREATE_FLAGS,
 649                                         offsetof(struct orangefs_inode_s,
 650                                                 link_target),
 651                                         sizeof_field(struct orangefs_inode_s,
 652                                                 link_target),
 653                                         orangefs_inode_cache_ctor);
 654
 655         if (!orangefs_inode_cache) {
 656                 gossip_err("Cannot create orangefs_inode_cache\n");
 657                 return -ENOMEM;
 658         }
 659         return 0;
 660 }
 661
 662 int orangefs_inode_cache_finalize(void)
 663 {
 664         kmem_cache_destroy(orangefs_inode_cache);
 665         return 0;
 666 }