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 struct lprocfs_vars 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         struct lprocfs_vars 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         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 142         generate_random_uuid(uuid);
 143         class_uuid_unparse(uuid, sbi->ll_sb_uuid);
 144
 145         sb->u.generic_sbp = sbi;
 146
 147         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 148
 149         if (!osc) {
 150                 CERROR("no osc\n");
 151                 GOTO(out_free, sb = NULL);
 152         }
 153
 154         if (!mdc) {
 155                 CERROR("no mdc\n");
 156                 GOTO(out_free, sb = NULL);
 157         }
 158
 159         obd = class_uuid2obd(mdc);
 160         if (!obd) {
 161                 CERROR("MDC %s: not setup or attached\n", mdc);
 162                 GOTO(out_free, sb = NULL);
 163         }
 164
 165         err = obd_connect(&sbi->ll_mdc_conn, obd, sbi->ll_sb_uuid,
 166                           ptlrpc_recovd, ll_recover);
 167         if (err) {
 168                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 169                 GOTO(out_free, sb = NULL);
 170         }
 171
 172 #warning Mike: is this the right place to raise the connection level?
 173         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 174         mdc_conn->c_level = LUSTRE_CONN_FULL;
 175         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 176
 177         obd = class_uuid2obd(osc);
 178         if (!obd) {
 179                 CERROR("OSC %s: not setup or attached\n", osc);
 180                 GOTO(out_mdc, sb = NULL);
 181         }
 182
 183         err = obd_connect(&sbi->ll_osc_conn, obd, sbi->ll_sb_uuid,
 184                           ptlrpc_recovd, ll_recover);
 185         if (err) {
 186                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 187                 GOTO(out_mdc, sb = NULL);
 188         }
 189
 190         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 191         if (err) {
 192                 CERROR("cannot mds_connect: rc = %d\n", err);
 193                 GOTO(out_mdc, sb = NULL);
 194         }
 195         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 196         sbi->ll_rootino = rootfid.id;
 197
 198         memset(&osfs, 0, sizeof(osfs));
 199         err = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 200         sb->s_blocksize = osfs.os_bsize;
 201         sb->s_blocksize_bits = log2(osfs.os_bsize);
 202         sb->s_magic = LL_SUPER_MAGIC;
 203         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 204
 205         sb->s_op = &ll_super_operations;
 206
 207         /* make root inode */
 208         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 209                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 210         if (err) {
 211                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 212                 GOTO(out_request, sb = NULL);
 213         }
 214
 215         /* initialize committed transaction callback daemon */
 216         spin_lock_init(&sbi->ll_commitcbd_lock);
 217         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 218         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 219         sbi->ll_commitcbd_flags = 0;
 220         err = ll_commitcbd_setup(sbi);
 221         if (err) {
 222                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 223                 GOTO(out_request, sb = NULL);
 224         }
 225
 226         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 227         lic.lic_lmm = NULL;
 228         LASSERT(sbi->ll_rootino != 0);
 229         root = iget4(sb, sbi->ll_rootino, NULL, &lic);
 230
 231         if (root) {
 232                 sb->s_root = d_alloc_root(root);
 233         } else {
 234                 CERROR("lustre_lite: bad iget4 for root\n");
 235                 GOTO(out_cdb, sb = NULL);
 236         }
 237
 238         ptlrpc_req_finished(request);
 239         request = NULL;
 240
 241
 242         /* Register this mount instance with LProcFS */
 243
 244         snprintf(mnt_name, 100, "mount_%s", sbi->ll_sb_uuid);
 245         sbi->ll_mnt_root=lprocfs_reg_mnt(mnt_name);
 246         if(!sbi->ll_mnt_root)
 247                 goto out_dev;
 248
 249         /* Add the static configuration info */
 250         lprocfs_add_vars(sbi->ll_mnt_root,
 251                          (struct lprocfs_vars*)status_var_nm_1,
 252                          (void*)sb);
 253
 254          /* Add the dynamic configuration stuff */
 255
 256         /* MDC */
 257         obd = class_uuid2obd(mdc);
 258
 259         /* Reuse mnt_name */
 260
 261         sprintf(mnt_name, "status/%s/common_name", obd->obd_type->typ_name);
 262
 263         memset(d_vars, 0, sizeof(d_vars));
 264         d_vars[0].read_fptr=rd_dev_name;
 265         d_vars[0].write_fptr=0;
 266         d_vars[0].name=(char*)mnt_name;
 267
 268
 269         snprintf(uuid_name, strlen(uuid_name), "status/%s/uuid",
 270                  obd->obd_type->typ_name);
 271         d_vars[1].read_fptr=rd_dev_uuid;
 272         d_vars[1].write_fptr=0;
 273         d_vars[1].name=(char*)uuid_name;
 274
 275         err=lprocfs_add_vars(sbi->ll_mnt_root, (struct lprocfs_vars* )d_vars,
 276                              (void*)obd);
 277         if (err) {
 278                 CDEBUG(D_OTHER, "Unable to add fs proc dynamic variables");
 279         }
 280
 281
 282         /* OSC or LOV*/
 283         obd = class_uuid2obd(osc);
 284         /* Reuse mnt_name */
 285
 286         snprintf(mnt_name, strlen(mnt_name), "status/%s/common_name",
 287                  obd->obd_type->typ_name);
 288
 289         memset(d_vars, 0, sizeof(d_vars));
 290         d_vars[0].read_fptr=rd_dev_name;
 291         d_vars[0].write_fptr=0;
 292         d_vars[0].name=(char*)mnt_name;
 293
 294
 295         snprintf(uuid_name, strlen(uuid_name), "status/%s/uuid",
 296                  obd->obd_type->typ_name);
 297         d_vars[1].read_fptr=rd_dev_uuid;
 298         d_vars[1].write_fptr=0;
 299         d_vars[1].name=(char*)uuid_name;
 300
 301         err=lprocfs_add_vars(sbi->ll_mnt_root, (struct lprocfs_vars* )d_vars,
 302                              (void*)obd);
 303         if (err) {
 304                 CDEBUG(D_OTHER, "Unable to add fs proc dynamic variables");
 305         }
 306 out_dev:
 307         if (mdc)
 308                 OBD_FREE(mdc, strlen(mdc) + 1);
 309         if (osc)
 310                 OBD_FREE(osc, strlen(osc) + 1);
 311
 312         RETURN(sb);
 313
 314 out_cdb:
 315         ll_commitcbd_cleanup(sbi);
 316 out_request:
 317         ptlrpc_req_finished(request);
 318         obd_disconnect(&sbi->ll_osc_conn);
 319 out_mdc:
 320         obd_disconnect(&sbi->ll_mdc_conn);
 321 out_free:
 322         OBD_FREE(sbi, sizeof(*sbi));
 323
 324         MOD_DEC_USE_COUNT;
 325         goto out_dev;
 326 } /* ll_read_super */
 327
 328 static void ll_put_super(struct super_block *sb)
 329 {
 330         struct ll_sb_info *sbi = ll_s2sbi(sb);
 331         struct list_head *tmp, *next;
 332         struct ll_fid rootfid;
 333         ENTRY;
 334
 335         list_del(&sbi->ll_conn_chain);
 336         ll_commitcbd_cleanup(sbi);
 337         obd_disconnect(&sbi->ll_osc_conn);
 338
 339         /* NULL request to force sync on the MDS, and get the last_committed
 340          * value to flush remaining RPCs from the sending queue on client.
 341          *
 342          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 343          *     which we can call for other reasons as well.
 344          */
 345         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 346
 347         lprocfs_dereg_mnt(sbi->ll_mnt_root);
 348         obd_disconnect(&sbi->ll_mdc_conn);
 349
 350         spin_lock(&dcache_lock);
 351         list_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list) {
 352                 struct dentry *dentry = list_entry(tmp, struct dentry, d_hash);
 353                 shrink_dcache_parent(dentry);
 354         }
 355         spin_unlock(&dcache_lock);
 356
 357         OBD_FREE(sbi, sizeof(*sbi));
 358
 359         MOD_DEC_USE_COUNT;
 360         EXIT;
 361 } /* ll_put_super */
 362
 363 static void ll_clear_inode(struct inode *inode)
 364 {
 365         struct ll_sb_info *sbi = ll_i2sbi(inode);
 366         int rc;
 367         ENTRY;
 368
 369         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 370         if (rc < 0) {
 371                 CERROR("obd_cancel_unused: %d\n", rc);
 372                 /* XXX FIXME do something dramatic */
 373         }
 374
 375         if (atomic_read(&inode->i_count) == 0) {
 376                 struct ll_inode_info *lli = ll_i2info(inode);
 377                 struct lov_stripe_md *lsm = lli->lli_smd;
 378                 char *symlink_name = lli->lli_symlink_name;
 379
 380                 if (lsm) {
 381                         OBD_FREE(lsm, ll_ost_easize(inode->i_sb));
 382                         lli->lli_smd = NULL;
 383                 }
 384                 if (symlink_name) {
 385                         OBD_FREE(symlink_name, strlen(symlink_name) + 1);
 386                         lli->lli_symlink_name = NULL;
 387                 }
 388         }
 389
 390         EXIT;
 391 }
 392
 393 static void ll_delete_inode(struct inode *inode)
 394 {
 395         ENTRY;
 396         if (S_ISREG(inode->i_mode)) {
 397                 int err;
 398                 struct obdo *oa;
 399                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 400
 401                 if (!lsm)
 402                         GOTO(out, -EINVAL);
 403
 404                 if (lsm->lsm_object_id == 0) {
 405                         CERROR("This really happens\n");
 406                         /* No obdo was ever created */
 407                         GOTO(out, 0);
 408                 }
 409
 410                 oa = obdo_alloc();
 411                 if (oa == NULL)
 412                         GOTO(out, -ENOMEM);
 413
 414                 oa->o_id = lsm->lsm_object_id;
 415                 oa->o_easize = ll_mds_easize(inode->i_sb);
 416                 oa->o_mode = inode->i_mode;
 417                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLEASIZE | OBD_MD_FLTYPE;
 418
 419                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 420                 obdo_free(oa);
 421                 CDEBUG(D_SUPER, "obd destroy of objid "LPX64" error %d\n",
 422                        lsm->lsm_object_id, err);
 423         }
 424 out:
 425         clear_inode(inode);
 426         EXIT;
 427 }
 428
 429 /* like inode_setattr, but doesn't mark the inode dirty */
 430 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 431 {
 432         unsigned int ia_valid = attr->ia_valid;
 433         int error = 0;
 434
 435         if ((ia_valid & ATTR_SIZE) && trunc) {
 436                 error = vmtruncate(inode, attr->ia_size);
 437                 if (error)
 438                         goto out;
 439         } else if (ia_valid & ATTR_SIZE)
 440                 inode->i_size = attr->ia_size;
 441
 442         if (ia_valid & ATTR_UID)
 443                 inode->i_uid = attr->ia_uid;
 444         if (ia_valid & ATTR_GID)
 445                 inode->i_gid = attr->ia_gid;
 446         if (ia_valid & ATTR_ATIME)
 447                 inode->i_atime = attr->ia_atime;
 448         if (ia_valid & ATTR_MTIME)
 449                 inode->i_mtime = attr->ia_mtime;
 450         if (ia_valid & ATTR_CTIME)
 451                 inode->i_ctime = attr->ia_ctime;
 452         if (ia_valid & ATTR_MODE) {
 453                 inode->i_mode = attr->ia_mode;
 454                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 455                         inode->i_mode &= ~S_ISGID;
 456         }
 457 out:
 458         return error;
 459 }
 460
 461 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 462 {
 463         struct ptlrpc_request *request = NULL;
 464         struct ll_sb_info *sbi = ll_i2sbi(inode);
 465         int err;
 466
 467         ENTRY;
 468
 469         /* change incore inode */
 470         ll_attr2inode(inode, attr, do_trunc);
 471
 472         err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, &request);
 473         if (err)
 474                 CERROR("mdc_setattr fails (%d)\n", err);
 475
 476         ptlrpc_req_finished(request);
 477
 478         RETURN(err);
 479 }
 480
 481 int ll_setattr(struct dentry *de, struct iattr *attr)
 482 {
 483         int rc = inode_change_ok(de->d_inode, attr);
 484
 485         if (rc)
 486                 return rc;
 487
 488         return ll_inode_setattr(de->d_inode, attr, 1);
 489 }
 490
 491 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 492 {
 493         struct ll_sb_info *sbi = ll_s2sbi(sb);
 494         struct obd_statfs osfs;
 495         int rc;
 496         ENTRY;
 497
 498         memset(sfs, 0, sizeof(*sfs));
 499         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 500         statfs_unpack(sfs, &osfs);
 501         if (rc)
 502                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 503         else
 504                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 505                        " objects "LPU64"/"LPU64"\n",
 506                        osfs.os_bavail, osfs.os_blocks,
 507                        osfs.os_ffree, osfs.os_files);
 508
 509         /* temporary until mds_statfs returns statfs info for all OSTs */
 510         if (!rc) {
 511                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 512                 if (rc) {
 513                         CERROR("obd_statfs fails: rc = %d\n", rc);
 514                         GOTO(out, rc);
 515                 }
 516                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 517                        " objects "LPU64"/"LPU64"\n",
 518                        osfs.os_bavail, osfs.os_blocks,
 519                        osfs.os_ffree, osfs.os_files);
 520
 521                 while (osfs.os_blocks > ~0UL) {
 522                         sfs->f_bsize <<= 1;
 523
 524                         osfs.os_blocks >>= 1;
 525                         osfs.os_bfree >>= 1;
 526                         osfs.os_bavail >>= 1;
 527                 }
 528                 sfs->f_blocks = osfs.os_blocks;
 529                 sfs->f_bfree = osfs.os_bfree;
 530                 sfs->f_bavail = osfs.os_bavail;
 531                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 532                         sfs->f_ffree = osfs.os_ffree;
 533         }
 534
 535 out:
 536         RETURN(rc);
 537 }
 538
 539 void ll_update_inode(struct inode *inode, struct mds_body *body)
 540 {
 541         if (body->valid & OBD_MD_FLID)
 542                 inode->i_ino = body->ino;
 543         if (body->valid & OBD_MD_FLATIME)
 544                 inode->i_atime = body->atime;
 545         if (body->valid & OBD_MD_FLMTIME)
 546                 inode->i_mtime = body->mtime;
 547         if (body->valid & OBD_MD_FLCTIME)
 548                 inode->i_ctime = body->ctime;
 549         if (body->valid & OBD_MD_FLMODE)
 550                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 551         if (body->valid & OBD_MD_FLTYPE)
 552                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 553         if (body->valid & OBD_MD_FLUID)
 554                 inode->i_uid = body->uid;
 555         if (body->valid & OBD_MD_FLGID)
 556                 inode->i_gid = body->gid;
 557         if (body->valid & OBD_MD_FLFLAGS)
 558                 inode->i_flags = body->flags;
 559         if (body->valid & OBD_MD_FLNLINK)
 560                 inode->i_nlink = body->nlink;
 561         if (body->valid & OBD_MD_FLGENER)
 562                 inode->i_generation = body->generation;
 563         if (body->valid & OBD_MD_FLRDEV)
 564                 inode->i_rdev = body->rdev;
 565         if (body->valid & OBD_MD_FLSIZE)
 566                 inode->i_size = body->size;
 567 }
 568
 569 static void ll_read_inode2(struct inode *inode, void *opaque)
 570 {
 571         struct ll_read_inode2_cookie *lic = opaque;
 572         struct mds_body *body = lic->lic_body;
 573         struct ll_inode_info *lli = ll_i2info(inode);
 574         ENTRY;
 575
 576         sema_init(&lli->lli_open_sem, 1);
 577
 578         /* core attributes first */
 579         ll_update_inode(inode, body);
 580
 581         //if (body->valid & OBD_MD_FLEASIZE)
 582         if (lic && lic->lic_lmm) {
 583                 struct lov_mds_md *lmm = lic->lic_lmm;
 584                 int size;
 585
 586                 /* XXX This should probably not be an error in the future,
 587                  *     when we allow LOV OSTs to be added.
 588                  */
 589                 if (lmm->lmm_easize != ll_mds_easize(inode->i_sb)) {
 590                         CERROR("Striping metadata size error %ld\n",
 591                                inode->i_ino);
 592                         LBUG();
 593                 }
 594                 size = ll_ost_easize(inode->i_sb);
 595                 OBD_ALLOC(lli->lli_smd, size);
 596                 if (!lli->lli_smd) {
 597                         CERROR("No memory for %d\n", size);
 598                         LBUG();
 599                 }
 600                 lov_unpackmd(lli->lli_smd, lmm);
 601         } else {
 602                 lli->lli_smd = NULL;
 603         }
 604
 605         /* Get the authoritative file size */
 606         if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
 607                 int rc;
 608
 609                 rc = ll_file_size(inode, lli->lli_smd);
 610                 if (rc) {
 611                         CERROR("ll_file_size: %d\n", rc);
 612                         /* FIXME: need to somehow prevent inode creation */
 613                         LBUG();
 614                 }
 615         }
 616
 617         /* OIDEBUG(inode); */
 618
 619         if (S_ISREG(inode->i_mode)) {
 620                 inode->i_op = &ll_file_inode_operations;
 621                 inode->i_fop = &ll_file_operations;
 622                 inode->i_mapping->a_ops = &ll_aops;
 623                 EXIT;
 624         } else if (S_ISDIR(inode->i_mode)) {
 625                 inode->i_op = &ll_dir_inode_operations;
 626                 inode->i_fop = &ll_dir_operations;
 627                 inode->i_mapping->a_ops = &ll_dir_aops;
 628                 EXIT;
 629         } else if (S_ISLNK(inode->i_mode)) {
 630                 inode->i_op = &ll_fast_symlink_inode_operations;
 631                 EXIT;
 632         } else {
 633                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 634                 EXIT;
 635         }
 636 }
 637
 638 static inline void invalidate_request_list(struct list_head *req_list)
 639 {
 640         struct list_head *tmp, *n;
 641         list_for_each_safe(tmp, n, req_list) {
 642                 struct ptlrpc_request *req =
 643                         list_entry(tmp, struct ptlrpc_request, rq_list);
 644                 CERROR("invalidating req xid "LPD64" op %d to %s:%d\n",
 645                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 646                        req->rq_connection->c_remote_uuid,
 647                        req->rq_import->imp_client->cli_request_portal);
 648                 req->rq_flags |= PTL_RPC_FL_ERR;
 649                 wake_up(&req->rq_wait_for_rep);
 650         }
 651 }
 652
 653 void ll_umount_begin(struct super_block *sb)
 654 {
 655         struct ll_sb_info *sbi = ll_s2sbi(sb);
 656         struct list_head *ctmp;
 657
 658         ENTRY;
 659
 660         list_for_each(ctmp, &sbi->ll_conn_chain) {
 661                 struct ptlrpc_connection *conn;
 662                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 663
 664                 spin_lock(&conn->c_lock);
 665                 /* XXX should just be dealing with imports, probably through
 666                  * XXX iocontrol, need next-gen recovery! */
 667                 conn->c_flags |= CONN_INVALID;
 668                 invalidate_request_list(&conn->c_sending_head);
 669                 invalidate_request_list(&conn->c_delayed_head);
 670                 spin_unlock(&conn->c_lock);
 671         }
 672
 673         EXIT;
 674 }
 675
 676 /* exported operations */
 677 struct super_operations ll_super_operations =
 678 {
 679         read_inode2: ll_read_inode2,
 680         clear_inode: ll_clear_inode,
 681         delete_inode: ll_delete_inode,
 682         put_super: ll_put_super,
 683         statfs: ll_statfs,
 684         umount_begin: ll_umount_begin
 685 };
 686
 687 struct file_system_type lustre_lite_fs_type = {
 688         "lustre_lite", 0, ll_read_super, NULL
 689 };
 690
 691 static int __init init_lustre_lite(void)
 692 {
 693         printk(KERN_INFO "Lustre Lite 0.5.14, info@clusterfs.com\n");
 694         ll_file_data_slab = kmem_cache_create("ll_file_data",
 695                                               sizeof(struct ll_file_data), 0,
 696                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 697         if (ll_file_data_slab == NULL)
 698                 return -ENOMEM;
 699         return register_filesystem(&lustre_lite_fs_type);
 700 }
 701
 702 static void __exit exit_lustre_lite(void)
 703 {
 704         unregister_filesystem(&lustre_lite_fs_type);
 705         kmem_cache_destroy(ll_file_data_slab);
 706 }
 707
 708 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 709 MODULE_DESCRIPTION("Lustre Lite Client File System v1.0");
 710 MODULE_LICENSE("GPL");
 711
 712 module_init(init_lustre_lite);
 713 module_exit(exit_lustre_lite);
 714 #endif