lustre/llite/super25.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Lustre Light Super operations
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  *
   9  * Copryright (C) 2002 Cluster File Systems, Inc.
  10  */
  11
  12 #define DEBUG_SUBSYSTEM S_LLITE
  13
  14 #include <linux/module.h>
  15 #include <linux/random.h>
  16 #include <linux/version.h>
  17 #include <linux/lustre_lite.h>
  18 #include <linux/lustre_ha.h>
  19 #include <linux/lustre_dlm.h>
  20 #include <linux/init.h>
  21 #include <linux/fs.h>
  22 #include <linux/lprocfs_status.h>
  23
  24 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
  25 kmem_cache_t *ll_file_data_slab;
  26 extern struct address_space_operations ll_aops;
  27 extern struct address_space_operations ll_dir_aops;
  28 struct super_operations ll_super_operations;
  29
  30 extern int ll_init_inodecache(void);
  31 extern void ll_destroy_inodecache(void);
  32 extern int ll_recover(struct recovd_data *, int);
  33 extern int ll_commitcbd_setup(struct ll_sb_info *);
  34 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
  35 int ll_read_inode2(struct inode *inode, void *opaque);
  36
  37 extern void ll_proc_namespace(struct super_block* sb, char* osc, char* mdc)
  38
  39 static char *ll_read_opt(const char *opt, char *data)
  40 {
  41         char *value;
  42         char *retval;
  43         ENTRY;
  44
  45         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  46         if ( strncmp(opt, data, strlen(opt)) )
  47                 RETURN(NULL);
  48         if ( (value = strchr(data, '=')) == NULL )
  49                 RETURN(NULL);
  50
  51         value++;
  52         OBD_ALLOC(retval, strlen(value) + 1);
  53         if ( !retval ) {
  54                 CERROR("out of memory!\n");
  55                 RETURN(NULL);
  56         }
  57
  58         memcpy(retval, value, strlen(value)+1);
  59         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  60         RETURN(retval);
  61 }
  62
  63 static int ll_set_opt(const char *opt, char *data, int fl)
  64 {
  65         ENTRY;
  66
  67         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  68         if ( strncmp(opt, data, strlen(opt)) )
  69                 RETURN(0);
  70         else
  71                 RETURN(fl);
  72 }
  73
  74 static void ll_options(char *options, char **ost, char **mds, int *flags)
  75 {
  76         char *opt_ptr = options;
  77         char *this_char;
  78         ENTRY;
  79
  80         if (!options) {
  81                 EXIT;
  82                 return;
  83         }
  84
  85         while ((this_char = strsep (&opt_ptr, ",")) != NULL) {
  86                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
  87                 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
  88                      (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
  89                      (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
  90                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
  91                         continue;
  92         }
  93         EXIT;
  94 }
  95
  96 #ifndef log2
  97 #define log2(n) ffz(~(n))
  98 #endif
  99
 100
 101 static int ll_fill_super(struct super_block *sb, void *data, int silent)
 102 {
 103         struct inode *root = 0;
 104         struct obd_device *obd;
 105         struct ll_sb_info *sbi;
 106         char *osc = NULL;
 107         char *mdc = NULL;
 108         int err;
 109         struct ll_fid rootfid;
 110         struct obd_statfs osfs;
 111         struct ptlrpc_request *request = NULL;
 112         struct ptlrpc_connection *mdc_conn;
 113         struct ll_read_inode2_cookie lic;
 114         class_uuid_t uuid;
 115
 116         ENTRY;
 117
 118         OBD_ALLOC(sbi, sizeof(*sbi));
 119         if (!sbi)
 120                 RETURN(-ENOMEM);
 121
 122         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 123         generate_random_uuid(uuid);
 124         class_uuid_unparse(uuid, sbi->ll_sb_uuid);
 125
 126         sb->s_fs_info = sbi;
 127
 128         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 129
 130         if (!osc) {
 131                 CERROR("no osc\n");
 132                 GOTO(out_free, sb = NULL);
 133         }
 134
 135         if (!mdc) {
 136                 CERROR("no mdc\n");
 137                 GOTO(out_free, sb = NULL);
 138         }
 139
 140         obd = class_uuid2obd(mdc);
 141         if (!obd) {
 142                 CERROR("MDC %s: not setup or attached\n", mdc);
 143                 GOTO(out_free, sb = NULL);
 144         }
 145
 146         err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
 147                           ptlrpc_recovd, ll_recover);
 148         if (err) {
 149                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 150                 GOTO(out_free, sb = NULL);
 151         }
 152
 153         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 154         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 155
 156         obd = class_uuid2obd(osc);
 157         if (!obd) {
 158                 CERROR("OSC %s: not setup or attached\n", osc);
 159                 GOTO(out_mdc, sb = NULL);
 160         }
 161
 162         err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
 163                           ptlrpc_recovd, ll_recover);
 164         if (err) {
 165                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 166                 GOTO(out_mdc, sb = NULL);
 167         }
 168
 169         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 170         if (err) {
 171                 CERROR("cannot mds_connect: rc = %d\n", err);
 172                 GOTO(out_mdc, sb = NULL);
 173         }
 174         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 175         sbi->ll_rootino = rootfid.id;
 176
 177         memset(&osfs, 0, sizeof(osfs));
 178         err = mdc_statfs(&sbi->ll_mdc_conn, &osfs);
 179         sb->s_blocksize = osfs.os_bsize;
 180         sb->s_blocksize_bits = log2(osfs.os_bsize);
 181         sb->s_magic = LL_SUPER_MAGIC;
 182         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 183
 184         sb->s_op = &ll_super_operations;
 185
 186         /* make root inode */
 187         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 188                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 189         if (err) {
 190                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 191                 GOTO(out_request, sb = NULL);
 192         }
 193
 194         /* initialize committed transaction callback daemon */
 195         spin_lock_init(&sbi->ll_commitcbd_lock);
 196         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 197         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 198         sbi->ll_commitcbd_flags = 0;
 199         err = ll_commitcbd_setup(sbi);
 200         if (err) {
 201                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 202                 GOTO(out_request, sb = NULL);
 203         }
 204
 205         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 206         lic.lic_lmm = NULL;
 207         root = iget5_locked(sb, sbi->ll_rootino, NULL,
 208                             ll_read_inode2, &lic);
 209
 210         if (root) {
 211                 sb->s_root = d_alloc_root(root);
 212         } else {
 213                 CERROR("lustre_lite: bad iget4 for root\n");
 214                 GOTO(out_cdb, sb = NULL);
 215         }
 216
 217         ptlrpc_req_finished(request);
 218         request = NULL;
 219         ll_proc_namespace(sb, osc, mdc)
 220 out_dev:
 221         if (mdc)
 222                 OBD_FREE(mdc, strlen(mdc) + 1);
 223         if (osc)
 224                 OBD_FREE(osc, strlen(osc) + 1);
 225
 226         RETURN(0);
 227
 228 out_cdb:
 229         ll_commitcbd_cleanup(sbi);
 230 out_request:
 231         ptlrpc_req_finished(request);
 232         obd_disconnect(&sbi->ll_osc_conn);
 233 out_mdc:
 234         obd_disconnect(&sbi->ll_mdc_conn);
 235 out_free:
 236         OBD_FREE(sbi, sizeof(*sbi));
 237
 238         goto out_dev;
 239 } /* ll_fill_super */
 240
 241 struct super_block * ll_get_sb(struct file_system_type *fs_type,
 242                                int flags, char *devname, void * data)
 243 {
 244         return get_sb_nodev(fs_type, flags, data, ll_fill_super);
 245 }
 246
 247 static void ll_put_super(struct super_block *sb)
 248 {
 249         struct ll_sb_info *sbi = ll_s2sbi(sb);
 250         struct ll_fid rootfid;
 251         ENTRY;
 252
 253         list_del(&sbi->ll_conn_chain);
 254         ll_commitcbd_cleanup(sbi);
 255         obd_disconnect(&sbi->ll_osc_conn);
 256
 257         /* NULL request to force sync on the MDS, and get the last_committed
 258          * value to flush remaining RPCs from the pending queue on client.
 259          *
 260          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 261          *     which we can call for other reasons as well.
 262          */
 263         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 264
 265         lprocfs_dereg_mnt(sbi->ll_proc_root);
 266         sbi->ll_proc_root = NULL;
 267
 268         obd_disconnect(&sbi->ll_mdc_conn);
 269         OBD_FREE(sbi, sizeof(*sbi));
 270
 271         EXIT;
 272 } /* ll_put_super */
 273
 274 static void ll_clear_inode(struct inode *inode)
 275 {
 276         struct ll_sb_info *sbi = ll_i2sbi(inode);
 277         struct ll_inode_info *lli = ll_i2info(inode);
 278         int rc;
 279         ENTRY;
 280
 281 #warning "Is there a reason we don't do this in 2.5, but we do in 2.4?"
 282 #if 0
 283         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 284         if (rc < 0) {
 285                 CERROR("mdc_cancel_unused: %d\n", rc);
 286                 /* XXX FIXME do something dramatic */
 287         }
 288
 289         if (lli->lli_smd) {
 290                 rc = obd_cancel_unused(&sbi->ll_osc_conn, lli->lli_smd, 0);
 291                 if (rc < 0) {
 292                         CERROR("obd_cancel_unused: %d\n", rc);
 293                         /* XXX FIXME do something dramatic */
 294                 }
 295         }
 296 #endif
 297
 298         if (atomic_read(&inode->i_count) != 0)
 299                 CERROR("clearing in-use inode %lu: count = %d\n",
 300                        inode->i_ino, atomic_read(&inode->i_count));
 301
 302         if (lli->lli_smd)
 303                 obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd);
 304
 305         if (lli->lli_symlink_name) {
 306                 OBD_FREE(lli->lli_symlink_name,strlen(lli->lli_symlink_name)+1);
 307                 lli->lli_symlink_name = NULL;
 308         }
 309
 310         EXIT;
 311 }
 312
 313 static void ll_delete_inode(struct inode *inode)
 314 {
 315         ENTRY;
 316         if (S_ISREG(inode->i_mode)) {
 317                 int err;
 318                 struct obdo *oa;
 319                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 320
 321                 /* mcreate with no open */
 322                 if (!lsm)
 323                         GOTO(out, 0);
 324
 325                 if (lsm->lsm_object_id == 0) {
 326                         CERROR("This really happens\n");
 327                         /* No obdo was ever created */
 328                         GOTO(out, 0);
 329                 }
 330
 331                 oa = obdo_alloc();
 332                 if (oa == NULL)
 333                         GOTO(out, -ENOMEM);
 334
 335                 oa->o_id = lsm->lsm_object_id;
 336                 oa->o_mode = inode->i_mode;
 337                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
 338
 339                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 340                 obdo_free(oa);
 341                 if (err)
 342                         CDEBUG(D_SUPER, "obd destroy objid "LPX64" error %d\n",
 343                                lsm->lsm_object_id, err);
 344         }
 345 out:
 346         clear_inode(inode);
 347         EXIT;
 348 }
 349
 350 /* like inode_setattr, but doesn't mark the inode dirty */
 351 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 352 {
 353         unsigned int ia_valid = attr->ia_valid;
 354         int error = 0;
 355
 356         if ((ia_valid & ATTR_SIZE) && trunc) {
 357                 error = vmtruncate(inode, attr->ia_size);
 358                 if (error)
 359                         goto out;
 360         } else if (ia_valid & ATTR_SIZE)
 361                 inode->i_size = attr->ia_size;
 362
 363         if (ia_valid & ATTR_UID)
 364                 inode->i_uid = attr->ia_uid;
 365         if (ia_valid & ATTR_GID)
 366                 inode->i_gid = attr->ia_gid;
 367         if (ia_valid & ATTR_ATIME)
 368                 inode->i_atime = attr->ia_atime;
 369         if (ia_valid & ATTR_MTIME)
 370                 inode->i_mtime = attr->ia_mtime;
 371         if (ia_valid & ATTR_CTIME)
 372                 inode->i_ctime = attr->ia_ctime;
 373         if (ia_valid & ATTR_MODE) {
 374                 inode->i_mode = attr->ia_mode;
 375                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 376                         inode->i_mode &= ~S_ISGID;
 377         }
 378 out:
 379         return error;
 380 }
 381
 382 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 383 {
 384         struct ptlrpc_request *request = NULL;
 385         struct ll_sb_info *sbi = ll_i2sbi(inode);
 386         int err = 0;
 387
 388         ENTRY;
 389
 390         /* change incore inode */
 391         ll_attr2inode(inode, attr, do_trunc);
 392
 393         /* Don't send size changes to MDS to avoid "fast EA" problems, and
 394          * also avoid a pointless RPC (we get file size from OST anyways).
 395          */
 396         attr->ia_valid &= ~ATTR_SIZE;
 397         if (attr->ia_valid) {
 398                 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
 399                 if (err)
 400                         CERROR("mdc_setattr fails (%d)\n", err);
 401
 402                 ptlrpc_req_finished(request);
 403         }
 404
 405         RETURN(err);
 406 }
 407
 408 int ll_setattr(struct dentry *de, struct iattr *attr)
 409 {
 410         int rc = inode_change_ok(de->d_inode, attr);
 411
 412         if (rc)
 413                 return rc;
 414
 415         return ll_inode_setattr(de->d_inode, attr, 1);
 416 }
 417
 418 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 419 {
 420         struct ll_sb_info *sbi = ll_s2sbi(sb);
 421         struct obd_statfs osfs;
 422         int rc;
 423         ENTRY;
 424
 425         memset(sfs, 0, sizeof(*sfs));
 426         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 427         statfs_unpack(sfs, &osfs);
 428         if (rc)
 429                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 430         else
 431                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 432                        " objects "LPU64"/"LPU64"\n",
 433                        osfs.os_bavail, osfs.os_blocks,
 434                        osfs.os_ffree, osfs.os_files);
 435
 436         /* temporary until mds_statfs returns statfs info for all OSTs */
 437         if (!rc) {
 438                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 439                 if (rc) {
 440                         CERROR("obd_statfs fails: rc = %d\n", rc);
 441                         GOTO(out, rc);
 442                 }
 443                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 444                        " objects "LPU64"/"LPU64"\n",
 445                        osfs.os_bavail, osfs.os_blocks,
 446                        osfs.os_ffree, osfs.os_files);
 447
 448                 while (osfs.os_blocks > ~0UL) {
 449                         sfs->f_bsize <<= 1;
 450
 451                         osfs.os_blocks >>= 1;
 452                         osfs.os_bfree >>= 1;
 453                         osfs.os_bavail >>= 1;
 454                 }
 455                 sfs->f_blocks = osfs.os_blocks;
 456                 sfs->f_bfree = osfs.os_bfree;
 457                 sfs->f_bavail = osfs.os_bavail;
 458                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 459                         sfs->f_ffree = osfs.os_ffree;
 460         }
 461
 462 out:
 463         RETURN(rc);
 464 }
 465
 466 void ll_update_inode(struct inode *inode, struct mds_body *body)
 467 {
 468         if (body->valid & OBD_MD_FLID)
 469                 inode->i_ino = body->ino;
 470         if (body->valid & OBD_MD_FLATIME)
 471                 inode->i_atime = body->atime;
 472         if (body->valid & OBD_MD_FLMTIME)
 473                 inode->i_mtime = body->mtime;
 474         if (body->valid & OBD_MD_FLCTIME)
 475                 inode->i_ctime = body->ctime;
 476         if (body->valid & OBD_MD_FLMODE)
 477                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 478         if (body->valid & OBD_MD_FLTYPE)
 479                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 480         if (body->valid & OBD_MD_FLUID)
 481                 inode->i_uid = body->uid;
 482         if (body->valid & OBD_MD_FLGID)
 483                 inode->i_gid = body->gid;
 484         if (body->valid & OBD_MD_FLFLAGS)
 485                 inode->i_flags = body->flags;
 486         if (body->valid & OBD_MD_FLNLINK)
 487                 inode->i_nlink = body->nlink;
 488         if (body->valid & OBD_MD_FLGENER)
 489                 inode->i_generation = body->generation;
 490         if (body->valid & OBD_MD_FLRDEV)
 491                 inode->i_rdev = to_kdev_t(body->rdev);
 492         if (body->valid & OBD_MD_FLSIZE)
 493                 inode->i_size = body->size;
 494 }
 495
 496 int ll_read_inode2(struct inode *inode, void *opaque)
 497 {
 498         struct ll_read_inode2_cookie *lic = opaque;
 499         struct mds_body *body = lic->lic_body;
 500         struct ll_inode_info *lli = ll_i2info(inode);
 501         int rc = 0;
 502         ENTRY;
 503
 504         sema_init(&lli->lli_open_sem, 1);
 505
 506         /* core attributes first */
 507         ll_update_inode(inode, body);
 508
 509         LASSERT(!lli->lli_smd);
 510         if (lic && lic->lic_lmm)
 511                 obd_unpackmd(ll_i2obdconn(inode), &lli->lli_smd, lic->lic_lmm);
 512
 513         /* Get the authoritative file size */
 514         if (lli->lli_smd && S_ISREG(inode->i_mode)) {
 515                 rc = ll_file_size(inode, lli->lli_smd);
 516                 if (rc) {
 517                         CERROR("ll_file_size: %d\n", rc);
 518                         ll_clear_inode(inode);
 519                         make_bad_inode(inode);
 520                         RETURN(rc);
 521                 }
 522         }
 523
 524         /* OIDEBUG(inode); */
 525
 526         if (S_ISREG(inode->i_mode)) {
 527                 inode->i_op = &ll_file_inode_operations;
 528                 inode->i_fop = &ll_file_operations;
 529                 inode->i_mapping->a_ops = &ll_aops;
 530                 EXIT;
 531         } else if (S_ISDIR(inode->i_mode)) {
 532                 inode->i_op = &ll_dir_inode_operations;
 533                 inode->i_fop = &ll_dir_operations;
 534                 inode->i_mapping->a_ops = &ll_dir_aops;
 535                 EXIT;
 536         } else if (S_ISLNK(inode->i_mode)) {
 537                 inode->i_op = &ll_fast_symlink_inode_operations;
 538                 EXIT;
 539         } else {
 540                 init_special_inode(inode, inode->i_mode,
 541                                    kdev_t_to_nr(inode->i_rdev));
 542                 EXIT;
 543         }
 544
 545         return rc;
 546 }
 547
 548 static inline void invalidate_request_list(struct list_head *req_list)
 549 {
 550         struct list_head *tmp, *n;
 551         list_for_each_safe(tmp, n, req_list) {
 552                 struct ptlrpc_request *req =
 553                         list_entry(tmp, struct ptlrpc_request, rq_list);
 554                 CERROR("invalidating req xid %d op %d to %s:%d\n",
 555                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 556                        req->rq_connection->c_remote_uuid,
 557                        req->rq_import->imp_client->cli_request_portal);
 558                 req->rq_flags |= PTL_RPC_FL_ERR;
 559                 wake_up(&req->rq_wait_for_rep);
 560         }
 561 }
 562
 563 void ll_umount_begin(struct super_block *sb)
 564 {
 565         struct ll_sb_info *sbi = ll_s2sbi(sb);
 566         struct list_head *ctmp;
 567
 568         ENTRY;
 569
 570         list_for_each(ctmp, &sbi->ll_conn_chain) {
 571                 struct ptlrpc_connection *conn;
 572                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 573
 574                 spin_lock(&conn->c_lock);
 575                 conn->c_flags |= CONN_INVALID;
 576                 invalidate_request_list(&conn->c_sending_head);
 577                 invalidate_request_list(&conn->c_delayed_head);
 578                 spin_unlock(&conn->c_lock);
 579         }
 580
 581         EXIT;
 582 }
 583
 584
 585 static kmem_cache_t *ll_inode_cachep;
 586
 587 static struct inode *ll_alloc_inode(struct super_block *sb)
 588 {
 589         struct ll_inode_info *lli;
 590         lli = kmem_cache_alloc(ll_inode_cachep, SLAB_KERNEL);
 591         if (!lli)
 592                 return NULL;
 593
 594         memset(lli, 0, (char *)&lli->lli_vfs_inode - (char *)lli);
 595         sema_init(&lli->lli_open_sem, 1);
 596
 597         return &lli->lli_vfs_inode;
 598 }
 599
 600 static void ll_destroy_inode(struct inode *inode)
 601 {
 602         kmem_cache_free(ll_inode_cachep, ll_i2info(inode));
 603 }
 604
 605 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
 606 {
 607         struct ll_inode_info *lli = foo;
 608
 609         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
 610             SLAB_CTOR_CONSTRUCTOR)
 611                 inode_init_once(&lli->lli_vfs_inode);
 612 }
 613
 614 int ll_init_inodecache(void)
 615 {
 616         ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
 617                                             sizeof(struct ll_inode_info),
 618                                             0, SLAB_HWCACHE_ALIGN,
 619                                             init_once, NULL);
 620         if (ll_inode_cachep == NULL)
 621                 return -ENOMEM;
 622         return 0;
 623 }
 624
 625 void ll_destroy_inodecache(void)
 626 {
 627         if (kmem_cache_destroy(ll_inode_cachep))
 628                 CERROR("ll_inode_cache: not all structures were freed\n");
 629 }
 630
 631
 632
 633 /* exported operations */
 634 struct super_operations ll_super_operations =
 635 {
 636         alloc_inode: ll_alloc_inode,
 637         destroy_inode: ll_destroy_inode,
 638         clear_inode: ll_clear_inode,
 639         delete_inode: ll_delete_inode,
 640         put_super: ll_put_super,
 641         statfs: ll_statfs,
 642         umount_begin: ll_umount_begin
 643 };
 644
 645 struct file_system_type lustre_lite_fs_type = {
 646         .owner  = THIS_MODULE,
 647         .name =   "lustre_lite",
 648         .get_sb = ll_get_sb,
 649         .kill_sb = kill_litter_super,
 650 };
 651
 652 static int __init init_lustre_lite(void)
 653 {
 654         int rc;
 655         printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
 656         rc = ll_init_inodecache();
 657         if (rc)
 658                 return -ENOMEM;
 659         ll_file_data_slab = kmem_cache_create("ll_file_data",
 660                                               sizeof(struct ll_file_data), 0,
 661                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 662         if (ll_file_data_slab == NULL) {
 663                 ll_destroy_inodecache();
 664                 return -ENOMEM;
 665         }
 666         return register_filesystem(&lustre_lite_fs_type);
 667 }
 668
 669 static void __exit exit_lustre_lite(void)
 670 {
 671         unregister_filesystem(&lustre_lite_fs_type);
 672         ll_destroy_inodecache();
 673         kmem_cache_destroy(ll_file_data_slab);
 674 }
 675
 676 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 677 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
 678 MODULE_LICENSE("GPL");
 679
 680 module_init(init_lustre_lite);
 681 module_exit(exit_lustre_lite);
 682 #endif