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 #include <linux/lprocfs_status.h>
  24
  25
  26 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  27 kmem_cache_t *ll_file_data_slab;
  28 extern struct address_space_operations ll_aops;
  29 extern struct address_space_operations ll_dir_aops;
  30 struct super_operations ll_super_operations;
  31
  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
  36 extern int rd_dev_uuid(char* page, char **start, off_t off,
  37                            int count, int *eof, void *data);
  38
  39 extern int rd_dev_name(char* page, char **start, off_t off,
  40                     int count, int *eof, void *data);
  41
  42
  43 extern lprocfs_vars_t status_var_nm_1[];
  44
  45 static char *ll_read_opt(const char *opt, char *data)
  46 {
  47         char *value;
  48         char *retval;
  49         ENTRY;
  50
  51         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  52         if ( strncmp(opt, data, strlen(opt)) )
  53                 RETURN(NULL);
  54         if ( (value = strchr(data, '=')) == NULL )
  55                 RETURN(NULL);
  56
  57         value++;
  58         OBD_ALLOC(retval, strlen(value) + 1);
  59         if ( !retval ) {
  60                 CERROR("out of memory!\n");
  61                 RETURN(NULL);
  62         }
  63
  64         memcpy(retval, value, strlen(value)+1);
  65         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  66         RETURN(retval);
  67 }
  68
  69 static int ll_set_opt(const char *opt, char *data, int fl)
  70 {
  71         ENTRY;
  72
  73         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  74         if ( strncmp(opt, data, strlen(opt)) )
  75                 RETURN(0);
  76         else
  77                 RETURN(fl);
  78 }
  79
  80 static void ll_options(char *options, char **ost, char **mds, int *flags)
  81 {
  82         char *this_char;
  83         ENTRY;
  84
  85         if (!options) {
  86                 EXIT;
  87                 return;
  88         }
  89
  90         for (this_char = strtok (options, ",");
  91              this_char != NULL;
  92              this_char = strtok (NULL, ",")) {
  93                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
  94                 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
  95                      (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
  96                      (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
  97                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
  98                         continue;
  99         }
 100         EXIT;
 101 }
 102
 103 #ifndef log2
 104 #define log2(n) ffz(~(n))
 105 #endif
 106
 107 static struct super_block * ll_read_super(struct super_block *sb,
 108                                           void *data, int silent)
 109 {
 110         struct inode *root = 0;
 111         struct obd_device *obd;
 112         struct ll_sb_info *sbi;
 113         char *osc = NULL;
 114         char *mdc = NULL;
 115         int err;
 116         struct ll_fid rootfid;
 117         struct obd_statfs osfs;
 118         struct ptlrpc_request *request = NULL;
 119         struct ptlrpc_connection *mdc_conn;
 120         struct ll_read_inode2_cookie lic;
 121         class_uuid_t uuid;
 122
 123
 124         /* Lprocfs variables */
 125         char mnt_name[100];
 126         char uuid_name[100];
 127         lprocfs_vars_t d_vars[3];
 128
 129
 130
 131         ENTRY;
 132         MOD_INC_USE_COUNT;
 133
 134         OBD_ALLOC(sbi, sizeof(*sbi));
 135         if (!sbi) {
 136                 MOD_DEC_USE_COUNT;
 137                 RETURN(NULL);
 138         }
 139
 140         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 141         generate_random_uuid(uuid);
 142         class_uuid_unparse(uuid, sbi->ll_sb_uuid);
 143
 144         sb->u.generic_sbp = sbi;
 145
 146         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 147
 148         if (!osc) {
 149                 CERROR("no osc\n");
 150                 GOTO(out_free, sb = NULL);
 151         }
 152
 153         if (!mdc) {
 154                 CERROR("no mdc\n");
 155                 GOTO(out_free, sb = NULL);
 156         }
 157
 158         obd = class_uuid2obd(mdc);
 159         if (!obd) {
 160                 CERROR("MDC %s: not setup or attached\n", mdc);
 161                 GOTO(out_free, sb = NULL);
 162         }
 163
 164         err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
 165                           ptlrpc_recovd, ll_recover);
 166         if (err) {
 167                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 168                 GOTO(out_free, sb = NULL);
 169         }
 170
 171 #warning Peter: is this the right place to raise the connection level?
 172         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 173         mdc_conn->c_level = LUSTRE_CONN_FULL;
 174         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 175
 176         obd = class_uuid2obd(osc);
 177         if (!obd) {
 178                 CERROR("OSC %s: not setup or attached\n", osc);
 179                 GOTO(out_mdc, sb = NULL);
 180         }
 181
 182         err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
 183                           ptlrpc_recovd, ll_recover);
 184         if (err) {
 185                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 186                 GOTO(out_mdc, sb = NULL);
 187         }
 188
 189         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 190         if (err) {
 191                 CERROR("cannot mds_connect: rc = %d\n", err);
 192                 GOTO(out_mdc, sb = NULL);
 193         }
 194         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 195         sbi->ll_rootino = rootfid.id;
 196
 197         memset(&osfs, 0, sizeof(osfs));
 198         err = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 199         sb->s_blocksize = osfs.os_bsize;
 200         sb->s_blocksize_bits = log2(osfs.os_bsize);
 201         sb->s_magic = LL_SUPER_MAGIC;
 202         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 203
 204         sb->s_op = &ll_super_operations;
 205
 206         /* make root inode */
 207         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 208                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 209         if (err) {
 210                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 211                 GOTO(out_request, sb = NULL);
 212         }
 213
 214         /* initialize committed transaction callback daemon */
 215         spin_lock_init(&sbi->ll_commitcbd_lock);
 216         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 217         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 218         sbi->ll_commitcbd_flags = 0;
 219         err = ll_commitcbd_setup(sbi);
 220         if (err) {
 221                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 222                 GOTO(out_request, sb = NULL);
 223         }
 224
 225         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 226         lic.lic_lmm = NULL;
 227         LASSERT(sbi->ll_rootino != 0);
 228         root = iget4(sb, sbi->ll_rootino, NULL, &lic);
 229
 230         if (root) {
 231                 sb->s_root = d_alloc_root(root);
 232         } else {
 233                 CERROR("lustre_lite: bad iget4 for root\n");
 234                 GOTO(out_cdb, sb = NULL);
 235         }
 236
 237         ptlrpc_req_finished(request);
 238         request = NULL;
 239
 240
 241         /* Register this mount instance with LProcFS */
 242
 243         snprintf(mnt_name, 100, "mount_%s", sbi->ll_sb_uuid);
 244         sbi->ll_mnt_root=lprocfs_reg_mnt(mnt_name);
 245         if(!sbi->ll_mnt_root)
 246                 goto out_dev;
 247
 248         /* Add the static configuration info */
 249         lprocfs_add_vars(sbi->ll_mnt_root, (lprocfs_vars_t*)status_var_nm_1,
 250                          (void*)sb);
 251
 252          /* Add the dynamic configuration stuff */
 253         /* MDC */
 254         obd = class_uuid2obd(mdc);
 255
 256         /* Reuse mnt_name */
 257
 258         sprintf(mnt_name, "status/%s/common_name", obd->obd_type->typ_name);
 259
 260         memset(d_vars, 0, sizeof(d_vars));
 261         d_vars[0].read_fptr=rd_dev_name;
 262         d_vars[0].write_fptr=0;
 263         d_vars[0].name=(char*)mnt_name;
 264
 265         memset(uuid_name, '\0', strlen(uuid_name));
 266         sprintf(uuid_name, "status/%s/uuid", obd->obd_type->typ_name);
 267         d_vars[1].read_fptr=rd_dev_uuid;
 268         d_vars[1].write_fptr=0;
 269         d_vars[1].name=(char*)uuid_name;
 270
 271         err=lprocfs_add_vars(sbi->ll_mnt_root, (lprocfs_vars_t*)d_vars,
 272                              (void*)obd);
 273         if (err) {
 274                 CDEBUG(D_OTHER, "Unable to add fs proc dynamic variables");
 275         }
 276
 277         /* OSC or LOV*/
 278         obd = class_uuid2obd(osc);
 279         /* Reuse mnt_name */
 280         memset(mnt_name, '\0', strlen(mnt_name));
 281         sprintf(mnt_name, "status/%s/common_name", obd->obd_type->typ_name);
 282
 283         memset(d_vars, 0, sizeof(d_vars));
 284         d_vars[0].read_fptr=rd_dev_name;
 285         d_vars[0].write_fptr=0;
 286         d_vars[0].name=(char*)mnt_name;
 287
 288         memset(uuid_name, '\0', strlen(uuid_name));
 289         sprintf(uuid_name, "status/%s/uuid", obd->obd_type->typ_name);
 290         d_vars[1].read_fptr=rd_dev_uuid;
 291         d_vars[1].write_fptr=0;
 292         d_vars[1].name=(char*)uuid_name;
 293
 294         err=lprocfs_add_vars(sbi->ll_mnt_root, (lprocfs_vars_t*)d_vars,
 295                              (void*)obd);
 296         if (err) {
 297                 CDEBUG(D_OTHER, "Unable to add fs proc dynamic variables");
 298         }
 299 out_dev:
 300         if (mdc)
 301                 OBD_FREE(mdc, strlen(mdc) + 1);
 302         if (osc)
 303                 OBD_FREE(osc, strlen(osc) + 1);
 304
 305         RETURN(sb);
 306
 307 out_cdb:
 308         ll_commitcbd_cleanup(sbi);
 309 out_request:
 310         ptlrpc_req_finished(request);
 311         obd_disconnect(&sbi->ll_osc_conn);
 312 out_mdc:
 313         obd_disconnect(&sbi->ll_mdc_conn);
 314 out_free:
 315         OBD_FREE(sbi, sizeof(*sbi));
 316
 317         MOD_DEC_USE_COUNT;
 318         goto out_dev;
 319 } /* ll_read_super */
 320
 321 static void ll_put_super(struct super_block *sb)
 322 {
 323         struct ll_sb_info *sbi = ll_s2sbi(sb);
 324         struct ll_fid rootfid;
 325         ENTRY;
 326
 327         list_del(&sbi->ll_conn_chain);
 328         ll_commitcbd_cleanup(sbi);
 329         obd_disconnect(&sbi->ll_osc_conn);
 330
 331         /* NULL request to force sync on the MDS, and get the last_committed
 332          * value to flush remaining RPCs from the sending queue on client.
 333          *
 334          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 335          *     which we can call for other reasons as well.
 336          */
 337         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 338
 339         lprocfs_dereg_mnt(sbi->ll_mnt_root);
 340         obd_disconnect(&sbi->ll_mdc_conn);
 341         OBD_FREE(sbi, sizeof(*sbi));
 342
 343         MOD_DEC_USE_COUNT;
 344         EXIT;
 345 } /* ll_put_super */
 346
 347 static void ll_clear_inode(struct inode *inode)
 348 {
 349         struct ll_sb_info *sbi = ll_i2sbi(inode);
 350         int rc;
 351         ENTRY;
 352
 353         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 354         if (rc < 0) {
 355                 CERROR("obd_cancel_unused: %d\n", rc);
 356                 /* XXX FIXME do something dramatic */
 357         }
 358
 359         if (atomic_read(&inode->i_count) == 0) {
 360                 struct ll_inode_info *lli = ll_i2info(inode);
 361                 struct lov_stripe_md *lsm = lli->lli_smd;
 362                 char *symlink_name = lli->lli_symlink_name;
 363
 364                 if (lsm) {
 365                         OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
 366                         lli->lli_smd = NULL;
 367                 }
 368                 if (symlink_name) {
 369                         OBD_FREE(symlink_name, strlen(symlink_name) + 1);
 370                         lli->lli_symlink_name = NULL;
 371                 }
 372         }
 373
 374         EXIT;
 375 }
 376
 377 static void ll_delete_inode(struct inode *inode)
 378 {
 379         ENTRY;
 380         if (S_ISREG(inode->i_mode)) {
 381                 int err;
 382                 struct obdo *oa;
 383                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 384
 385                 if (!lsm)
 386                         GOTO(out, -EINVAL);
 387
 388                 if (lsm->lsm_object_id == 0) {
 389                         CERROR("This really happens\n");
 390                         /* No obdo was ever created */
 391                         GOTO(out, 0);
 392                 }
 393
 394                 oa = obdo_alloc();
 395                 if (oa == NULL)
 396                         GOTO(out, -ENOMEM);
 397
 398                 oa->o_id = lsm->lsm_object_id;
 399                 oa->o_easize = ll_mds_easize(inode->i_sb);
 400                 oa->o_mode = inode->i_mode;
 401                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
 402
 403                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 404                 obdo_free(oa);
 405                 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
 406                        lsm->lsm_object_id, err);
 407         }
 408 out:
 409         clear_inode(inode);
 410         EXIT;
 411 }
 412
 413 /* like inode_setattr, but doesn't mark the inode dirty */
 414 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 415 {
 416         unsigned int ia_valid = attr->ia_valid;
 417         int error = 0;
 418
 419         if ((ia_valid & ATTR_SIZE) && trunc) {
 420                 error = vmtruncate(inode, attr->ia_size);
 421                 if (error)
 422                         goto out;
 423         } else if (ia_valid & ATTR_SIZE)
 424                 inode->i_size = attr->ia_size;
 425
 426         if (ia_valid & ATTR_UID)
 427                 inode->i_uid = attr->ia_uid;
 428         if (ia_valid & ATTR_GID)
 429                 inode->i_gid = attr->ia_gid;
 430         if (ia_valid & ATTR_ATIME)
 431                 inode->i_atime = attr->ia_atime;
 432         if (ia_valid & ATTR_MTIME)
 433                 inode->i_mtime = attr->ia_mtime;
 434         if (ia_valid & ATTR_CTIME)
 435                 inode->i_ctime = attr->ia_ctime;
 436         if (ia_valid & ATTR_MODE) {
 437                 inode->i_mode = attr->ia_mode;
 438                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 439                         inode->i_mode &= ~S_ISGID;
 440         }
 441 out:
 442         return error;
 443 }
 444
 445 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 446 {
 447         struct ptlrpc_request *request = NULL;
 448         struct ll_sb_info *sbi = ll_i2sbi(inode);
 449         int err;
 450
 451         ENTRY;
 452
 453         /* change incore inode */
 454         ll_attr2inode(inode, attr, do_trunc);
 455
 456         err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
 457         if (err)
 458                 CERROR("mdc_setattr fails (%d)\n", err);
 459
 460         ptlrpc_req_finished(request);
 461
 462         RETURN(err);
 463 }
 464
 465 int ll_setattr(struct dentry *de, struct iattr *attr)
 466 {
 467         int rc = inode_change_ok(de->d_inode, attr);
 468
 469         if (rc)
 470                 return rc;
 471
 472         return ll_inode_setattr(de->d_inode, attr, 1);
 473 }
 474
 475 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 476 {
 477         struct ll_sb_info *sbi = ll_s2sbi(sb);
 478         struct obd_statfs osfs;
 479         int rc;
 480         ENTRY;
 481
 482         memset(sfs, 0, sizeof(*sfs));
 483         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 484         statfs_unpack(sfs, &osfs);
 485         if (rc)
 486                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 487         else
 488                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 489                        " objects "LPU64"/"LPU64"\n",
 490                        osfs.os_bavail, osfs.os_blocks,
 491                        osfs.os_ffree, osfs.os_files);
 492
 493         /* temporary until mds_statfs returns statfs info for all OSTs */
 494         if (!rc) {
 495                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 496                 if (rc) {
 497                         CERROR("obd_statfs fails: rc = %d\n", rc);
 498                         GOTO(out, rc);
 499                 }
 500                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 501                        " objects "LPU64"/"LPU64"\n",
 502                        osfs.os_bavail, osfs.os_blocks,
 503                        osfs.os_ffree, osfs.os_files);
 504
 505                 while (osfs.os_blocks > ~0UL) {
 506                         sfs->f_bsize <<= 1;
 507
 508                         osfs.os_blocks >>= 1;
 509                         osfs.os_bfree >>= 1;
 510                         osfs.os_bavail >>= 1;
 511                 }
 512                 sfs->f_blocks = osfs.os_blocks;
 513                 sfs->f_bfree = osfs.os_bfree;
 514                 sfs->f_bavail = osfs.os_bavail;
 515                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 516                         sfs->f_ffree = osfs.os_ffree;
 517         }
 518
 519 out:
 520         RETURN(rc);
 521 }
 522
 523 void ll_update_inode(struct inode *inode, struct mds_body *body)
 524 {
 525         if (body->valid & OBD_MD_FLID)
 526                 inode->i_ino = body->ino;
 527         if (body->valid & OBD_MD_FLATIME)
 528                 inode->i_atime = body->atime;
 529         if (body->valid & OBD_MD_FLMTIME)
 530                 inode->i_mtime = body->mtime;
 531         if (body->valid & OBD_MD_FLCTIME)
 532                 inode->i_ctime = body->ctime;
 533         if (body->valid & OBD_MD_FLMODE)
 534                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 535         if (body->valid & OBD_MD_FLTYPE)
 536                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 537         if (body->valid & OBD_MD_FLUID)
 538                 inode->i_uid = body->uid;
 539         if (body->valid & OBD_MD_FLGID)
 540                 inode->i_gid = body->gid;
 541         if (body->valid & OBD_MD_FLFLAGS)
 542                 inode->i_flags = body->flags;
 543         if (body->valid & OBD_MD_FLNLINK)
 544                 inode->i_nlink = body->nlink;
 545         if (body->valid & OBD_MD_FLGENER)
 546                 inode->i_generation = body->generation;
 547         if (body->valid & OBD_MD_FLRDEV)
 548                 inode->i_rdev = body->rdev;
 549         if (body->valid & OBD_MD_FLSIZE)
 550                 inode->i_size = body->size;
 551 }
 552
 553 static void ll_read_inode2(struct inode *inode, void *opaque)
 554 {
 555         struct ll_read_inode2_cookie *lic = opaque;
 556         struct mds_body *body = lic->lic_body;
 557         struct ll_inode_info *lli = ll_i2info(inode);
 558         ENTRY;
 559
 560         sema_init(&lli->lli_open_sem, 1);
 561
 562         /* core attributes first */
 563         ll_update_inode(inode, body);
 564
 565         //if (body->valid & OBD_MD_FLEASIZE)
 566         if (lic && lic->lic_lmm) {
 567                 struct lov_mds_md *lmm = lic->lic_lmm;
 568                 int size;
 569
 570                 /* XXX This should probably not be an error in the future,
 571                  *     when we allow LOV OSTs to be added.
 572                  */
 573                 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
 574                         CERROR("Striping metadata size error %ld\n",
 575                                inode->i_ino);
 576                         LBUG();
 577                 }
 578                 size = ll_ost_easize(inode->i_sb);
 579                 OBD_ALLOC(lli->lli_smd, size);
 580                 if (!lli->lli_smd) {
 581                         CERROR("No memory for %d\n", size);
 582                         LBUG();
 583                 }
 584                 lov_unpackmd(lli->lli_smd, lmm);
 585         } else {
 586                 lli->lli_smd = NULL;
 587         }
 588
 589         /* Get the authoritative file size */
 590         if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
 591                 int rc;
 592
 593                 rc = ll_file_size(inode, lli->lli_smd);
 594                 if (rc) {
 595                         CERROR("ll_file_size: %d\n", rc);
 596                         /* FIXME: need to somehow prevent inode creation */
 597                         LBUG();
 598                 }
 599         }
 600
 601         /* OIDEBUG(inode); */
 602
 603         if (S_ISREG(inode->i_mode)) {
 604                 inode->i_op = &ll_file_inode_operations;
 605                 inode->i_fop = &ll_file_operations;
 606                 inode->i_mapping->a_ops = &ll_aops;
 607                 EXIT;
 608         } else if (S_ISDIR(inode->i_mode)) {
 609                 inode->i_op = &ll_dir_inode_operations;
 610                 inode->i_fop = &ll_dir_operations;
 611                 inode->i_mapping->a_ops = &ll_dir_aops;
 612                 EXIT;
 613         } else if (S_ISLNK(inode->i_mode)) {
 614                 inode->i_op = &ll_fast_symlink_inode_operations;
 615                 EXIT;
 616         } else {
 617                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 618                 EXIT;
 619         }
 620 }
 621
 622 static inline void invalidate_request_list(struct list_head *req_list)
 623 {
 624         struct list_head *tmp, *n;
 625         list_for_each_safe(tmp, n, req_list) {
 626                 struct ptlrpc_request *req =
 627                         list_entry(tmp, struct ptlrpc_request, rq_list);
 628                 CERROR("invalidating req xid "LPD64" op %d to %s:%d\n",
 629                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 630                        req->rq_connection->c_remote_uuid,
 631                        req->rq_import->imp_client->cli_request_portal);
 632                 req->rq_flags |= PTL_RPC_FL_ERR;
 633                 wake_up(&req->rq_wait_for_rep);
 634         }
 635 }
 636
 637 void ll_umount_begin(struct super_block *sb)
 638 {
 639         struct ll_sb_info *sbi = ll_s2sbi(sb);
 640         struct list_head *ctmp;
 641
 642         ENTRY;
 643
 644         list_for_each(ctmp, &sbi->ll_conn_chain) {
 645                 struct ptlrpc_connection *conn;
 646                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 647
 648                 spin_lock(&conn->c_lock);
 649                 /* XXX should just be dealing with imports, probably through
 650                  * XXX iocontrol, need next-gen recovery! */
 651                 conn->c_flags |= CONN_INVALID;
 652                 invalidate_request_list(&conn->c_sending_head);
 653                 invalidate_request_list(&conn->c_delayed_head);
 654                 spin_unlock(&conn->c_lock);
 655         }
 656
 657         EXIT;
 658 }
 659
 660 /* exported operations */
 661 struct super_operations ll_super_operations =
 662 {
 663         read_inode2: ll_read_inode2,
 664         clear_inode: ll_clear_inode,
 665         delete_inode: ll_delete_inode,
 666         put_super: ll_put_super,
 667         statfs: ll_statfs,
 668         umount_begin: ll_umount_begin
 669 };
 670
 671 struct file_system_type lustre_lite_fs_type = {
 672         "lustre_lite", 0, ll_read_super, NULL
 673 };
 674
 675 static int __init init_lustre_lite(void)
 676 {
 677         printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
 678         ll_file_data_slab = kmem_cache_create("ll_file_data",
 679                                               sizeof(struct ll_file_data), 0,
 680                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 681         if (ll_file_data_slab == NULL)
 682                 return -ENOMEM;
 683         return register_filesystem(&lustre_lite_fs_type);
 684 }
 685
 686 static void __exit exit_lustre_lite(void)
 687 {
 688         unregister_filesystem(&lustre_lite_fs_type);
 689         kmem_cache_destroy(ll_file_data_slab);
 690 }
 691
 692 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 693 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
 694 MODULE_LICENSE("GPL");
 695
 696 module_init(init_lustre_lite);
 697 module_exit(exit_lustre_lite);
 698 #endif