lustre/llite/super.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/obd_lov.h>
  20 #include <linux/lustre_dlm.h>
  21 #include <linux/init.h>
  22 #include <linux/fs.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_recover(struct recovd_data *, int);
  31 extern int ll_commitcbd_setup(struct ll_sb_info *);
  32 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
  33
  34 static char *ll_read_opt(const char *opt, char *data)
  35 {
  36         char *value;
  37         char *retval;
  38         ENTRY;
  39
  40         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  41         if ( strncmp(opt, data, strlen(opt)) )
  42                 RETURN(NULL);
  43         if ( (value = strchr(data, '=')) == NULL )
  44                 RETURN(NULL);
  45
  46         value++;
  47         OBD_ALLOC(retval, strlen(value) + 1);
  48         if ( !retval ) {
  49                 CERROR("out of memory!\n");
  50                 RETURN(NULL);
  51         }
  52
  53         memcpy(retval, value, strlen(value)+1);
  54         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  55         RETURN(retval);
  56 }
  57
  58 static int ll_set_opt(const char *opt, char *data, int fl)
  59 {
  60         ENTRY;
  61
  62         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  63         if ( strncmp(opt, data, strlen(opt)) )
  64                 RETURN(0);
  65         else
  66                 RETURN(fl);
  67 }
  68
  69 static void ll_options(char *options, char **ost, char **mds, int *flags)
  70 {
  71         char *this_char;
  72         ENTRY;
  73
  74         if (!options) {
  75                 EXIT;
  76                 return;
  77         }
  78
  79         for (this_char = strtok (options, ",");
  80              this_char != NULL;
  81              this_char = strtok (NULL, ",")) {
  82                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
  83                 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
  84                      (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
  85                      (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
  86                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
  87                         continue;
  88         }
  89         EXIT;
  90 }
  91
  92 #ifndef log2
  93 #define log2(n) ffz(~(n))
  94 #endif
  95
  96 static struct super_block * ll_read_super(struct super_block *sb,
  97                                           void *data, int silent)
  98 {
  99         struct inode *root = 0;
 100         struct obd_device *obd;
 101         struct ll_sb_info *sbi;
 102         char *osc = NULL;
 103         char *mdc = NULL;
 104         int err;
 105         struct ll_fid rootfid;
 106         struct obd_statfs osfs;
 107         struct ptlrpc_request *request = NULL;
 108         struct ptlrpc_connection *mdc_conn;
 109         struct ll_read_inode2_cookie lic;
 110         class_uuid_t uuid;
 111
 112         ENTRY;
 113         MOD_INC_USE_COUNT;
 114
 115         OBD_ALLOC(sbi, sizeof(*sbi));
 116         if (!sbi) {
 117                 MOD_DEC_USE_COUNT;
 118                 RETURN(NULL);
 119         }
 120
 121         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 122         generate_random_uuid(uuid);
 123         class_uuid_unparse(uuid, sbi->ll_sb_uuid);
 124
 125         sb->u.generic_sbp = sbi;
 126
 127         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 128
 129         if (!osc) {
 130                 CERROR("no osc\n");
 131                 GOTO(out_free, sb = NULL);
 132         }
 133
 134         if (!mdc) {
 135                 CERROR("no mdc\n");
 136                 GOTO(out_free, sb = NULL);
 137         }
 138
 139         obd = class_uuid2obd(mdc);
 140         if (!obd) {
 141                 CERROR("MDC %s: not setup or attached\n", mdc);
 142                 GOTO(out_free, sb = NULL);
 143         }
 144
 145         err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
 146                           ptlrpc_recovd, ll_recover);
 147         if (err) {
 148                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 149                 GOTO(out_free, sb = NULL);
 150         }
 151
 152 #warning Peter: is this the right place to raise the connection level?
 153         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 154         mdc_conn->c_level = LUSTRE_CONN_FULL;
 155         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 156
 157         obd = class_uuid2obd(osc);
 158         if (!obd) {
 159                 CERROR("OSC %s: not setup or attached\n", osc);
 160                 GOTO(out_mdc, sb = NULL);
 161         }
 162
 163         err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
 164                           ptlrpc_recovd, ll_recover);
 165         if (err) {
 166                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 167                 GOTO(out_mdc, sb = NULL);
 168         }
 169
 170         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 171         if (err) {
 172                 CERROR("cannot mds_connect: rc = %d\n", err);
 173                 GOTO(out_mdc, sb = NULL);
 174         }
 175         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 176         sbi->ll_rootino = rootfid.id;
 177
 178         memset(&osfs, 0, sizeof(osfs));
 179         err = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 180         sb->s_blocksize = osfs.os_bsize;
 181         sb->s_blocksize_bits = log2(osfs.os_bsize);
 182         sb->s_magic = LL_SUPER_MAGIC;
 183         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 184
 185         sb->s_op = &ll_super_operations;
 186
 187         /* make root inode */
 188         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 189                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 190         if (err) {
 191                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 192                 GOTO(out_request, sb = NULL);
 193         }
 194
 195         /* initialize committed transaction callback daemon */
 196         spin_lock_init(&sbi->ll_commitcbd_lock);
 197         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 198         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 199         sbi->ll_commitcbd_flags = 0;
 200         err = ll_commitcbd_setup(sbi);
 201         if (err) {
 202                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 203                 GOTO(out_request, sb = NULL);
 204         }
 205
 206         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 207         lic.lic_lmm = NULL;
 208         LASSERT(sbi->ll_rootino != 0);
 209         root = iget4(sb, sbi->ll_rootino, NULL, &lic);
 210
 211         if (root) {
 212                 sb->s_root = d_alloc_root(root);
 213         } else {
 214                 CERROR("lustre_lite: bad iget4 for root\n");
 215                 GOTO(out_cdb, sb = NULL);
 216         }
 217
 218         ptlrpc_req_finished(request);
 219         request = NULL;
 220
 221 out_dev:
 222         if (mdc)
 223                 OBD_FREE(mdc, strlen(mdc) + 1);
 224         if (osc)
 225                 OBD_FREE(osc, strlen(osc) + 1);
 226
 227         RETURN(sb);
 228
 229 out_cdb:
 230         ll_commitcbd_cleanup(sbi);
 231 out_request:
 232         ptlrpc_req_finished(request);
 233         obd_disconnect(&sbi->ll_osc_conn);
 234 out_mdc:
 235         obd_disconnect(&sbi->ll_mdc_conn);
 236 out_free:
 237         OBD_FREE(sbi, sizeof(*sbi));
 238
 239         MOD_DEC_USE_COUNT;
 240         goto out_dev;
 241 } /* ll_read_super */
 242
 243 static void ll_put_super(struct super_block *sb)
 244 {
 245         struct ll_sb_info *sbi = ll_s2sbi(sb);
 246         struct ll_fid rootfid;
 247         ENTRY;
 248
 249         list_del(&sbi->ll_conn_chain);
 250         ll_commitcbd_cleanup(sbi);
 251         obd_disconnect(&sbi->ll_osc_conn);
 252
 253         /* NULL request to force sync on the MDS, and get the last_committed
 254          * value to flush remaining RPCs from the sending queue on client.
 255          *
 256          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 257          *     which we can call for other reasons as well.
 258          */
 259         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 260
 261         obd_disconnect(&sbi->ll_mdc_conn);
 262         OBD_FREE(sbi, sizeof(*sbi));
 263
 264         MOD_DEC_USE_COUNT;
 265         EXIT;
 266 } /* ll_put_super */
 267
 268 static void ll_clear_inode(struct inode *inode)
 269 {
 270         struct ll_sb_info *sbi = ll_i2sbi(inode);
 271         int rc;
 272         ENTRY;
 273
 274         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 275         if (rc < 0) {
 276                 CERROR("obd_cancel_unused: %d\n", rc);
 277                 /* XXX FIXME do something dramatic */
 278         }
 279
 280         if (atomic_read(&inode->i_count) == 0) {
 281                 struct ll_inode_info *lli = ll_i2info(inode);
 282                 struct lov_stripe_md *lsm = lli->lli_smd;
 283                 char *symlink_name = lli->lli_symlink_name;
 284
 285                 if (lsm) {
 286                         OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
 287                         lli->lli_smd = NULL;
 288                 }
 289                 if (symlink_name) {
 290                         OBD_FREE(symlink_name, strlen(symlink_name) + 1);
 291                         lli->lli_symlink_name = NULL;
 292                 }
 293         }
 294
 295         EXIT;
 296 }
 297
 298 static void ll_delete_inode(struct inode *inode)
 299 {
 300         ENTRY;
 301         if (S_ISREG(inode->i_mode)) {
 302                 int err;
 303                 struct obdo *oa;
 304                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 305
 306                 if (!lsm)
 307                         GOTO(out, -EINVAL);
 308
 309                 if (lsm->lsm_object_id == 0) {
 310                         CERROR("This really happens\n");
 311                         /* No obdo was ever created */
 312                         GOTO(out, 0);
 313                 }
 314
 315                 oa = obdo_alloc();
 316                 if (oa == NULL)
 317                         GOTO(out, -ENOMEM);
 318
 319                 oa->o_id = lsm->lsm_object_id;
 320                 oa->o_easize = ll_mds_easize(inode->i_sb);
 321                 oa->o_mode = inode->i_mode;
 322                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
 323
 324                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 325                 obdo_free(oa);
 326                 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
 327                        lsm->lsm_object_id, err);
 328         }
 329 out:
 330         clear_inode(inode);
 331         EXIT;
 332 }
 333
 334 /* like inode_setattr, but doesn't mark the inode dirty */
 335 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 336 {
 337         unsigned int ia_valid = attr->ia_valid;
 338         int error = 0;
 339
 340         if ((ia_valid & ATTR_SIZE) && trunc) {
 341                 error = vmtruncate(inode, attr->ia_size);
 342                 if (error)
 343                         goto out;
 344         } else if (ia_valid & ATTR_SIZE)
 345                 inode->i_size = attr->ia_size;
 346
 347         if (ia_valid & ATTR_UID)
 348                 inode->i_uid = attr->ia_uid;
 349         if (ia_valid & ATTR_GID)
 350                 inode->i_gid = attr->ia_gid;
 351         if (ia_valid & ATTR_ATIME)
 352                 inode->i_atime = attr->ia_atime;
 353         if (ia_valid & ATTR_MTIME)
 354                 inode->i_mtime = attr->ia_mtime;
 355         if (ia_valid & ATTR_CTIME)
 356                 inode->i_ctime = attr->ia_ctime;
 357         if (ia_valid & ATTR_MODE) {
 358                 inode->i_mode = attr->ia_mode;
 359                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 360                         inode->i_mode &= ~S_ISGID;
 361         }
 362 out:
 363         return error;
 364 }
 365
 366 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 367 {
 368         struct ptlrpc_request *request = NULL;
 369         struct ll_sb_info *sbi = ll_i2sbi(inode);
 370         int err;
 371
 372         ENTRY;
 373
 374         /* change incore inode */
 375         ll_attr2inode(inode, attr, do_trunc);
 376
 377         err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
 378         if (err)
 379                 CERROR("mdc_setattr fails (%d)\n", err);
 380
 381         ptlrpc_req_finished(request);
 382
 383         RETURN(err);
 384 }
 385
 386 int ll_setattr(struct dentry *de, struct iattr *attr)
 387 {
 388         int rc = inode_change_ok(de->d_inode, attr);
 389
 390         if (rc)
 391                 return rc;
 392
 393         return ll_inode_setattr(de->d_inode, attr, 1);
 394 }
 395
 396 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 397 {
 398         struct ll_sb_info *sbi = ll_s2sbi(sb);
 399         struct obd_statfs osfs;
 400         int rc;
 401         ENTRY;
 402
 403         memset(sfs, 0, sizeof(*sfs));
 404         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 405         statfs_unpack(sfs, &osfs);
 406         if (rc)
 407                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 408         else
 409                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 410                        " objects "LPU64"/"LPU64"\n",
 411                        osfs.os_bavail, osfs.os_blocks,
 412                        osfs.os_ffree, osfs.os_files);
 413
 414         /* temporary until mds_statfs returns statfs info for all OSTs */
 415         if (!rc) {
 416                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 417                 if (rc) {
 418                         CERROR("obd_statfs fails: rc = %d\n", rc);
 419                         GOTO(out, rc);
 420                 }
 421                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 422                        " objects "LPU64"/"LPU64"\n",
 423                        osfs.os_bavail, osfs.os_blocks,
 424                        osfs.os_ffree, osfs.os_files);
 425
 426                 while (osfs.os_blocks > ~0UL) {
 427                         sfs->f_bsize <<= 1;
 428
 429                         osfs.os_blocks >>= 1;
 430                         osfs.os_bfree >>= 1;
 431                         osfs.os_bavail >>= 1;
 432                 }
 433                 sfs->f_blocks = osfs.os_blocks;
 434                 sfs->f_bfree = osfs.os_bfree;
 435                 sfs->f_bavail = osfs.os_bavail;
 436                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 437                         sfs->f_ffree = osfs.os_ffree;
 438         }
 439
 440 out:
 441         RETURN(rc);
 442 }
 443
 444 void ll_update_inode(struct inode *inode, struct mds_body *body)
 445 {
 446         if (body->valid & OBD_MD_FLID)
 447                 inode->i_ino = body->ino;
 448         if (body->valid & OBD_MD_FLATIME)
 449                 inode->i_atime = body->atime;
 450         if (body->valid & OBD_MD_FLMTIME)
 451                 inode->i_mtime = body->mtime;
 452         if (body->valid & OBD_MD_FLCTIME)
 453                 inode->i_ctime = body->ctime;
 454         if (body->valid & OBD_MD_FLMODE)
 455                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 456         if (body->valid & OBD_MD_FLTYPE)
 457                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 458         if (body->valid & OBD_MD_FLUID)
 459                 inode->i_uid = body->uid;
 460         if (body->valid & OBD_MD_FLGID)
 461                 inode->i_gid = body->gid;
 462         if (body->valid & OBD_MD_FLFLAGS)
 463                 inode->i_flags = body->flags;
 464         if (body->valid & OBD_MD_FLNLINK)
 465                 inode->i_nlink = body->nlink;
 466         if (body->valid & OBD_MD_FLGENER)
 467                 inode->i_generation = body->generation;
 468         if (body->valid & OBD_MD_FLRDEV)
 469                 inode->i_rdev = body->rdev;
 470         if (body->valid & OBD_MD_FLSIZE)
 471                 inode->i_size = body->size;
 472 }
 473
 474 static void ll_read_inode2(struct inode *inode, void *opaque)
 475 {
 476         struct ll_read_inode2_cookie *lic = opaque;
 477         struct mds_body *body = lic->lic_body;
 478         struct ll_inode_info *lli = ll_i2info(inode);
 479         ENTRY;
 480
 481         sema_init(&lli->lli_open_sem, 1);
 482
 483         /* core attributes first */
 484         ll_update_inode(inode, body);
 485
 486         //if (body->valid & OBD_MD_FLEASIZE)
 487         if (lic && lic->lic_lmm) {
 488                 struct lov_mds_md *lmm = lic->lic_lmm;
 489                 int size;
 490
 491                 /* XXX This should probably not be an error in the future,
 492                  *     when we allow LOV OSTs to be added.
 493                  */
 494                 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
 495                         CERROR("Striping metadata size error %ld\n",
 496                                inode->i_ino);
 497                         LBUG();
 498                 }
 499                 size = ll_ost_easize(inode->i_sb);
 500                 OBD_ALLOC(lli->lli_smd, size);
 501                 if (!lli->lli_smd) {
 502                         CERROR("No memory for %d\n", size);
 503                         LBUG();
 504                 }
 505                 lov_unpackmd(lli->lli_smd, lmm);
 506         } else {
 507                 lli->lli_smd = NULL;
 508         }
 509
 510         /* Get the authoritative file size */
 511         if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
 512                 int rc;
 513
 514                 rc = ll_file_size(inode, lli->lli_smd);
 515                 if (rc) {
 516                         CERROR("ll_file_size: %d\n", rc);
 517                         /* FIXME: need to somehow prevent inode creation */
 518                         LBUG();
 519                 }
 520         }
 521
 522         /* OIDEBUG(inode); */
 523
 524         if (S_ISREG(inode->i_mode)) {
 525                 inode->i_op = &ll_file_inode_operations;
 526                 inode->i_fop = &ll_file_operations;
 527                 inode->i_mapping->a_ops = &ll_aops;
 528                 EXIT;
 529         } else if (S_ISDIR(inode->i_mode)) {
 530                 inode->i_op = &ll_dir_inode_operations;
 531                 inode->i_fop = &ll_dir_operations;
 532                 inode->i_mapping->a_ops = &ll_dir_aops;
 533                 EXIT;
 534         } else if (S_ISLNK(inode->i_mode)) {
 535                 inode->i_op = &ll_fast_symlink_inode_operations;
 536                 EXIT;
 537         } else {
 538                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 539                 EXIT;
 540         }
 541 }
 542
 543 static inline void invalidate_request_list(struct list_head *req_list)
 544 {
 545         struct list_head *tmp, *n;
 546         list_for_each_safe(tmp, n, req_list) {
 547                 struct ptlrpc_request *req =
 548                         list_entry(tmp, struct ptlrpc_request, rq_list);
 549                 CERROR("invalidating req xid "LPD64" op %d to %s:%d\n",
 550                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 551                        req->rq_connection->c_remote_uuid,
 552                        req->rq_import->imp_client->cli_request_portal);
 553                 req->rq_flags |= PTL_RPC_FL_ERR;
 554                 wake_up(&req->rq_wait_for_rep);
 555         }
 556 }
 557
 558 void ll_umount_begin(struct super_block *sb)
 559 {
 560         struct ll_sb_info *sbi = ll_s2sbi(sb);
 561         struct list_head *ctmp;
 562
 563         ENTRY;
 564
 565         list_for_each(ctmp, &sbi->ll_conn_chain) {
 566                 struct ptlrpc_connection *conn;
 567                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 568
 569                 spin_lock(&conn->c_lock);
 570                 /* XXX should just be dealing with imports, probably through
 571                  * XXX iocontrol, need next-gen recovery! */
 572                 conn->c_flags |= CONN_INVALID;
 573                 invalidate_request_list(&conn->c_sending_head);
 574                 invalidate_request_list(&conn->c_delayed_head);
 575                 spin_unlock(&conn->c_lock);
 576         }
 577
 578         EXIT;
 579 }
 580
 581 /* exported operations */
 582 struct super_operations ll_super_operations =
 583 {
 584         read_inode2: ll_read_inode2,
 585         clear_inode: ll_clear_inode,
 586         delete_inode: ll_delete_inode,
 587         put_super: ll_put_super,
 588         statfs: ll_statfs,
 589         umount_begin: ll_umount_begin
 590 };
 591
 592 struct file_system_type lustre_lite_fs_type = {
 593         "lustre_lite", 0, ll_read_super, NULL
 594 };
 595
 596 static int __init init_lustre_lite(void)
 597 {
 598         printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
 599         ll_file_data_slab = kmem_cache_create("ll_file_data",
 600                                               sizeof(struct ll_file_data), 0,
 601                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 602         if (ll_file_data_slab == NULL)
 603                 return -ENOMEM;
 604         return register_filesystem(&lustre_lite_fs_type);
 605 }
 606
 607 static void __exit exit_lustre_lite(void)
 608 {
 609         unregister_filesystem(&lustre_lite_fs_type);
 610         kmem_cache_destroy(ll_file_data_slab);
 611 }
 612
 613 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 614 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
 615 MODULE_LICENSE("GPL");
 616
 617 module_init(init_lustre_lite);
 618 module_exit(exit_lustre_lite);
 619 #endif