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  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #define DEBUG_SUBSYSTEM S_LLITE
  25
  26 #include <linux/module.h>
  27 #include <linux/random.h>
  28 #include <linux/version.h>
  29 #include <linux/lustre_lite.h>
  30 #include <linux/lustre_ha.h>
  31 #include <linux/lustre_dlm.h>
  32 #include <linux/init.h>
  33 #include <linux/fs.h>
  34 #include <linux/lprocfs_status.h>
  35
  36 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  37 kmem_cache_t *ll_file_data_slab;
  38 extern struct address_space_operations ll_aops;
  39 extern struct address_space_operations ll_dir_aops;
  40 struct super_operations ll_super_operations;
  41
  42 /* /proc/lustre/llite root that tracks llite mount points */
  43 struct proc_dir_entry *proc_lustre_fs_root = NULL;
  44 /* lproc_llite.c */
  45 extern int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  46                                        struct super_block *sb,
  47                                        char *osc, char *mdc);
  48
  49 extern int ll_recover(struct recovd_data *, int);
  50 extern int ll_commitcbd_setup(struct ll_sb_info *);
  51 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
  52
  53 static char *ll_read_opt(const char *opt, char *data)
  54 {
  55         char *value;
  56         char *retval;
  57         ENTRY;
  58
  59         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  60         if ( strncmp(opt, data, strlen(opt)) )
  61                 RETURN(NULL);
  62         if ( (value = strchr(data, '=')) == NULL )
  63                 RETURN(NULL);
  64
  65         value++;
  66         OBD_ALLOC(retval, strlen(value) + 1);
  67         if ( !retval ) {
  68                 CERROR("out of memory!\n");
  69                 RETURN(NULL);
  70         }
  71
  72         memcpy(retval, value, strlen(value)+1);
  73         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  74         RETURN(retval);
  75 }
  76
  77 static int ll_set_opt(const char *opt, char *data, int fl)
  78 {
  79         ENTRY;
  80
  81         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  82         if ( strncmp(opt, data, strlen(opt)) )
  83                 RETURN(0);
  84         else
  85                 RETURN(fl);
  86 }
  87
  88 static void ll_options(char *options, char **ost, char **mds, int *flags)
  89 {
  90         char *this_char;
  91         ENTRY;
  92
  93         if (!options) {
  94                 EXIT;
  95                 return;
  96         }
  97
  98         for (this_char = strtok (options, ",");
  99              this_char != NULL;
 100              this_char = strtok (NULL, ",")) {
 101                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
 102                 if ( (!*ost && (*ost = ll_read_opt("osc", this_char)))||
 103                      (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
 104                      (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) |
 105                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))) )
 106                         continue;
 107         }
 108         EXIT;
 109 }
 110
 111 #ifndef log2
 112 #define log2(n) ffz(~(n))
 113 #endif
 114
 115 static struct super_block *ll_read_super(struct super_block *sb,
 116                                          void *data, int silent)
 117 {
 118         struct inode *root = 0;
 119         struct obd_device *obd;
 120         struct ll_sb_info *sbi;
 121         char *osc = NULL;
 122         char *mdc = NULL;
 123         int err;
 124         struct ll_fid rootfid;
 125         struct obd_statfs osfs;
 126         struct ptlrpc_request *request = NULL;
 127         struct ptlrpc_connection *mdc_conn;
 128         struct ll_read_inode2_cookie lic;
 129         class_uuid_t uuid;
 130         struct obd_uuid param_uuid;
 131
 132         ENTRY;
 133
 134         CDEBUG(D_VFSTRACE, "VFS Op\n");
 135         OBD_ALLOC(sbi, sizeof(*sbi));
 136         if (!sbi)
 137                 RETURN(NULL);
 138
 139         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 140         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 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         strncpy(param_uuid.uuid, mdc, sizeof(param_uuid.uuid));
 159         obd = class_uuid2obd(&param_uuid);
 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         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 173         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 174
 175         strncpy(param_uuid.uuid, osc, sizeof(param_uuid.uuid));
 176         obd = class_uuid2obd(&param_uuid);
 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         if (proc_lustre_fs_root) {
 241                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 242                                                   osc, mdc);
 243                 if (err < 0)
 244                         CERROR("could not register mount in /proc/lustre");
 245         }
 246
 247 out_dev:
 248         if (mdc)
 249                 OBD_FREE(mdc, strlen(mdc) + 1);
 250         if (osc)
 251                 OBD_FREE(osc, strlen(osc) + 1);
 252
 253         RETURN(sb);
 254
 255 out_cdb:
 256         ll_commitcbd_cleanup(sbi);
 257 out_request:
 258         ptlrpc_req_finished(request);
 259         obd_disconnect(&sbi->ll_osc_conn);
 260 out_mdc:
 261         obd_disconnect(&sbi->ll_mdc_conn);
 262 out_free:
 263         OBD_FREE(sbi, sizeof(*sbi));
 264
 265         goto out_dev;
 266 } /* ll_read_super */
 267
 268 static void ll_put_super(struct super_block *sb)
 269 {
 270         struct ll_sb_info *sbi = ll_s2sbi(sb);
 271         struct list_head *tmp, *next;
 272         struct ll_fid rootfid;
 273         ENTRY;
 274
 275         CDEBUG(D_VFSTRACE, "VFS Op\n");
 276         list_del(&sbi->ll_conn_chain);
 277         ll_commitcbd_cleanup(sbi);
 278         obd_disconnect(&sbi->ll_osc_conn);
 279
 280         /* NULL request to force sync on the MDS, and get the last_committed
 281          * value to flush remaining RPCs from the sending queue on client.
 282          *
 283          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 284          *     which we can call for other reasons as well.
 285          */
 286         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 287
 288         if (sbi->ll_proc_root) {
 289                 lprocfs_remove(sbi->ll_proc_root);
 290                 sbi->ll_proc_root = NULL;
 291         }
 292
 293         obd_disconnect(&sbi->ll_mdc_conn);
 294
 295         spin_lock(&dcache_lock);
 296         list_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list) {
 297                 struct dentry *dentry = list_entry(tmp, struct dentry, d_hash);
 298                 shrink_dcache_parent(dentry);
 299         }
 300         spin_unlock(&dcache_lock);
 301
 302         OBD_FREE(sbi, sizeof(*sbi));
 303
 304         EXIT;
 305 } /* ll_put_super */
 306
 307 static void ll_clear_inode(struct inode *inode)
 308 {
 309         struct ll_sb_info *sbi = ll_i2sbi(inode);
 310         struct ll_inode_info *lli = ll_i2info(inode);
 311         int rc;
 312         ENTRY;
 313
 314         CDEBUG(D_VFSTRACE, "VFS Op\n");
 315         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 316         if (rc < 0) {
 317                 CERROR("mdc_cancel_unused: %d\n", rc);
 318                 /* XXX FIXME do something dramatic */
 319         }
 320
 321         if (lli->lli_smd) {
 322                 rc = obd_cancel_unused(&sbi->ll_osc_conn, lli->lli_smd, 0);
 323                 if (rc < 0) {
 324                         CERROR("obd_cancel_unused: %d\n", rc);
 325                         /* XXX FIXME do something dramatic */
 326                 }
 327         }
 328
 329         if (atomic_read(&inode->i_count) != 0)
 330                 CERROR("clearing in-use inode %lu: count = %d\n",
 331                        inode->i_ino, atomic_read(&inode->i_count));
 332
 333         if (lli->lli_smd)
 334                 obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd);
 335
 336         if (lli->lli_symlink_name) {
 337                 OBD_FREE(lli->lli_symlink_name,
 338                          strlen(lli->lli_symlink_name) + 1);
 339                 lli->lli_symlink_name = NULL;
 340         }
 341
 342         EXIT;
 343 }
 344
 345 #if 0
 346 static void ll_delete_inode(struct inode *inode)
 347 {
 348         ENTRY;
 349         CDEBUG(D_VFSTRACE, "VFS Op\n");
 350         if (S_ISREG(inode->i_mode)) {
 351                 int err;
 352                 struct obdo *oa;
 353                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 354
 355                 /* mcreate with no open */
 356                 if (!lsm)
 357                         GOTO(out, 0);
 358
 359                 if (lsm->lsm_object_id == 0) {
 360                         CERROR("This really happens\n");
 361                         /* No obdo was ever created */
 362                         GOTO(out, 0);
 363                 }
 364
 365                 oa = obdo_alloc();
 366                 if (oa == NULL)
 367                         GOTO(out, -ENOMEM);
 368
 369                 oa->o_id = lsm->lsm_object_id;
 370                 obdo_from_inode(oa, inode, OBD_MD_FLID | OBD_MD_FLTYPE);
 371
 372                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm, NULL);
 373                 obdo_free(oa);
 374                 if (err)
 375                         CDEBUG(D_INODE,
 376                                "inode %lu obd_destroy objid "LPX64" error %d\n",
 377                                inode->i_ino, lsm->lsm_object_id, err);
 378         }
 379 out:
 380         clear_inode(inode);
 381         EXIT;
 382 }
 383 #endif
 384
 385 /* like inode_setattr, but doesn't mark the inode dirty */
 386 static int ll_attr2inode(struct inode *inode, struct iattr *attr, int trunc)
 387 {
 388         unsigned int ia_valid = attr->ia_valid;
 389         int error = 0;
 390
 391         if ((ia_valid & ATTR_SIZE) && trunc) {
 392                 error = vmtruncate(inode, attr->ia_size);
 393                 if (error)
 394                         goto out;
 395         } else if (ia_valid & ATTR_SIZE)
 396                 inode->i_size = attr->ia_size;
 397
 398         if (ia_valid & ATTR_UID)
 399                 inode->i_uid = attr->ia_uid;
 400         if (ia_valid & ATTR_GID)
 401                 inode->i_gid = attr->ia_gid;
 402         if (ia_valid & ATTR_ATIME)
 403                 inode->i_atime = attr->ia_atime;
 404         if (ia_valid & ATTR_MTIME)
 405                 inode->i_mtime = attr->ia_mtime;
 406         if (ia_valid & ATTR_CTIME)
 407                 inode->i_ctime = attr->ia_ctime;
 408         if (ia_valid & ATTR_MODE) {
 409                 inode->i_mode = attr->ia_mode;
 410                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 411                         inode->i_mode &= ~S_ISGID;
 412         }
 413 out:
 414         return error;
 415 }
 416
 417 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 418 {
 419         struct ptlrpc_request *request = NULL;
 420         struct ll_sb_info *sbi = ll_i2sbi(inode);
 421         int err = 0;
 422         ENTRY;
 423
 424         /* change incore inode */
 425         ll_attr2inode(inode, attr, do_trunc);
 426
 427         /* Don't send size changes to MDS to avoid "fast EA" problems, and
 428          * also avoid a pointless RPC (we get file size from OST anyways).
 429          */
 430         attr->ia_valid &= ~ATTR_SIZE;
 431         if (attr->ia_valid) {
 432                 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, NULL, 0,
 433                                   &request);
 434                 if (err)
 435                         CERROR("mdc_setattr fails: err = %d\n", err);
 436
 437                 ptlrpc_req_finished(request);
 438                 if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) {
 439                         struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 440                         struct obdo oa;
 441                         int err2;
 442
 443                         CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
 444                                inode->i_ino, attr->ia_mtime);
 445                         oa.o_id = lsm->lsm_object_id;
 446                         oa.o_mode = S_IFREG;
 447                         oa.o_valid = OBD_MD_FLID |OBD_MD_FLTYPE |OBD_MD_FLMTIME;
 448                         oa.o_mtime = attr->ia_mtime;
 449                         err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL);
 450                         if (err2) {
 451                                 CERROR("obd_setattr fails: rc=%d\n", err);
 452                                 if (!err)
 453                                         err = err2;
 454                         }
 455                 }
 456         }
 457
 458         RETURN(err);
 459 }
 460
 461 int ll_setattr_raw(struct inode *inode, struct iattr *attr)
 462 {
 463         struct ptlrpc_request *request = NULL;
 464         struct ll_sb_info *sbi = ll_i2sbi(inode);
 465         int err = 0;
 466         ENTRY;
 467
 468         if ((attr->ia_valid & ATTR_SIZE)) {
 469                 err = vmtruncate(inode, attr->ia_size);
 470                 if (err)
 471                         RETURN(err);
 472         }
 473
 474         /* Don't send size changes to MDS to avoid "fast EA" problems, and
 475          * also avoid a pointless RPC (we get file size from OST anyways).
 476          */
 477         attr->ia_valid &= ~ATTR_SIZE;
 478         if (!attr->ia_valid)
 479                 RETURN(0);
 480
 481         err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, NULL, 0,
 482                           &request);
 483         if (err)
 484                 CERROR("mdc_setattr fails: err = %d\n", err);
 485
 486         ptlrpc_req_finished(request);
 487
 488         if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) {
 489                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 490                 struct obdo oa;
 491                 int err2;
 492
 493                 CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
 494                        inode->i_ino, attr->ia_mtime);
 495                 oa.o_id = lsm->lsm_object_id;
 496                 oa.o_mode = S_IFREG;
 497                 oa.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMTIME;
 498                 oa.o_mtime = attr->ia_mtime;
 499                 err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL);
 500                 if (err2) {
 501                         CERROR("obd_setattr fails: rc=%d\n", err);
 502                         if (!err)
 503                                 err = err2;
 504                 }
 505         }
 506         RETURN(err);
 507 }
 508
 509 int ll_setattr(struct dentry *de, struct iattr *attr)
 510 {
 511         int rc = inode_change_ok(de->d_inode, attr);
 512
 513         CDEBUG(D_VFSTRACE, "VFS Op\n");
 514         if (rc)
 515                 return rc;
 516
 517         return ll_inode_setattr(de->d_inode, attr, 1);
 518 }
 519
 520 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 521 {
 522         struct ll_sb_info *sbi = ll_s2sbi(sb);
 523         struct obd_statfs osfs;
 524         int rc;
 525         ENTRY;
 526
 527         CDEBUG(D_VFSTRACE, "VFS Op\n");
 528         memset(sfs, 0, sizeof(*sfs));
 529         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 530         statfs_unpack(sfs, &osfs);
 531         if (rc)
 532                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 533         else
 534                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 535                        " objects "LPU64"/"LPU64"\n",
 536                        osfs.os_bavail, osfs.os_blocks,
 537                        osfs.os_ffree, osfs.os_files);
 538
 539         /* temporary until mds_statfs returns statfs info for all OSTs */
 540         if (!rc) {
 541                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 542                 if (rc) {
 543                         CERROR("obd_statfs fails: rc = %d\n", rc);
 544                         GOTO(out, rc);
 545                 }
 546                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 547                        " objects "LPU64"/"LPU64"\n",
 548                        osfs.os_bavail, osfs.os_blocks,
 549                        osfs.os_ffree, osfs.os_files);
 550
 551                 while (osfs.os_blocks > ~0UL) {
 552                         sfs->f_bsize <<= 1;
 553
 554                         osfs.os_blocks >>= 1;
 555                         osfs.os_bfree >>= 1;
 556                         osfs.os_bavail >>= 1;
 557                 }
 558                 sfs->f_blocks = osfs.os_blocks;
 559                 sfs->f_bfree = osfs.os_bfree;
 560                 sfs->f_bavail = osfs.os_bavail;
 561                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 562                         sfs->f_ffree = osfs.os_ffree;
 563         }
 564
 565 out:
 566         RETURN(rc);
 567 }
 568
 569 void ll_update_inode(struct inode *inode, struct mds_body *body,
 570                      struct lov_mds_md *lmm)
 571 {
 572         struct ll_inode_info *lli = ll_i2info(inode);
 573
 574         if (lmm != NULL)
 575                 obd_unpackmd(ll_i2obdconn(inode), &lli->lli_smd, lmm);
 576
 577         if (body->valid & OBD_MD_FLID)
 578                 inode->i_ino = body->ino;
 579         if (body->valid & OBD_MD_FLATIME)
 580                 inode->i_atime = body->atime;
 581         if (body->valid & OBD_MD_FLMTIME)
 582                 inode->i_mtime = body->mtime;
 583         if (body->valid & OBD_MD_FLCTIME)
 584                 inode->i_ctime = body->ctime;
 585         if (body->valid & OBD_MD_FLMODE)
 586                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 587         if (body->valid & OBD_MD_FLTYPE)
 588                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 589         if (body->valid & OBD_MD_FLUID)
 590                 inode->i_uid = body->uid;
 591         if (body->valid & OBD_MD_FLGID)
 592                 inode->i_gid = body->gid;
 593         if (body->valid & OBD_MD_FLFLAGS)
 594                 inode->i_flags = body->flags;
 595         if (body->valid & OBD_MD_FLNLINK)
 596                 inode->i_nlink = body->nlink;
 597         if (body->valid & OBD_MD_FLGENER)
 598                 inode->i_generation = body->generation;
 599         if (body->valid & OBD_MD_FLRDEV)
 600                 inode->i_rdev = body->rdev;
 601         if (body->valid & OBD_MD_FLSIZE)
 602                 inode->i_size = body->size;
 603         if (body->valid & OBD_MD_FLBLOCKS)
 604                 inode->i_blocks = body->blocks;
 605 }
 606
 607 static void ll_read_inode2(struct inode *inode, void *opaque)
 608 {
 609         struct ll_read_inode2_cookie *lic = opaque;
 610         struct mds_body *body = lic->lic_body;
 611         struct ll_inode_info *lli = ll_i2info(inode);
 612         ENTRY;
 613
 614         CDEBUG(D_VFSTRACE, "VFS Op\n");
 615         sema_init(&lli->lli_open_sem, 1);
 616
 617         LASSERT(!lli->lli_smd);
 618
 619         /* core attributes first */
 620         ll_update_inode(inode, body, lic ? lic->lic_lmm : NULL);
 621
 622         /* Get the authoritative file size */
 623         if (lli->lli_smd && (inode->i_mode & S_IFREG)) {
 624                 int rc;
 625                 LASSERT(lli->lli_smd->lsm_object_id != 0);
 626                 rc = ll_file_size(inode, lli->lli_smd, NULL);
 627                 if (rc) {
 628                         CERROR("ll_file_size: %d\n", rc);
 629                         ll_clear_inode(inode);
 630                         make_bad_inode(inode);
 631                 }
 632         }
 633
 634         /* OIDEBUG(inode); */
 635
 636         if (S_ISREG(inode->i_mode)) {
 637                 inode->i_op = &ll_file_inode_operations;
 638                 inode->i_fop = &ll_file_operations;
 639                 inode->i_mapping->a_ops = &ll_aops;
 640                 EXIT;
 641         } else if (S_ISDIR(inode->i_mode)) {
 642                 inode->i_op = &ll_dir_inode_operations;
 643                 inode->i_fop = &ll_dir_operations;
 644                 inode->i_mapping->a_ops = &ll_dir_aops;
 645                 EXIT;
 646         } else if (S_ISLNK(inode->i_mode)) {
 647                 inode->i_op = &ll_fast_symlink_inode_operations;
 648                 EXIT;
 649         } else {
 650                 inode->i_op = &ll_special_inode_operations;
 651                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 652                 EXIT;
 653         }
 654 }
 655
 656 static inline void invalidate_request_list(struct list_head *req_list)
 657 {
 658         struct list_head *tmp, *n;
 659         list_for_each_safe(tmp, n, req_list) {
 660                 struct ptlrpc_request *req =
 661                         list_entry(tmp, struct ptlrpc_request, rq_list);
 662                 CERROR("invalidating req xid "LPU64" op %d to %s:%d\n",
 663                        req->rq_xid, req->rq_reqmsg->opc,
 664                        req->rq_connection->c_remote_uuid.uuid,
 665                        req->rq_import->imp_client->cli_request_portal);
 666                 req->rq_flags |= PTL_RPC_FL_ERR;
 667                 wake_up(&req->rq_wait_for_rep);
 668         }
 669 }
 670
 671 void ll_umount_begin(struct super_block *sb)
 672 {
 673         struct ll_sb_info *sbi = ll_s2sbi(sb);
 674         struct list_head *ctmp;
 675
 676         ENTRY;
 677         CDEBUG(D_VFSTRACE, "VFS Op\n");
 678
 679         list_for_each(ctmp, &sbi->ll_conn_chain) {
 680                 struct ptlrpc_connection *conn;
 681                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 682
 683                 spin_lock(&conn->c_lock);
 684                 /* XXX should just be dealing with imports, probably through
 685                  * XXX iocontrol, need next-gen recovery! */
 686                 conn->c_flags |= CONN_INVALID;
 687                 /* invalidate_request_list(&conn->c_sending_head); */
 688                 invalidate_request_list(&conn->c_delayed_head);
 689                 spin_unlock(&conn->c_lock);
 690         }
 691
 692         EXIT;
 693 }
 694
 695 /* exported operations */
 696 struct super_operations ll_super_operations =
 697 {
 698         read_inode2: ll_read_inode2,
 699         clear_inode: ll_clear_inode,
 700         //        delete_inode: ll_delete_inode,
 701         put_super: ll_put_super,
 702         statfs: ll_statfs,
 703         umount_begin: ll_umount_begin
 704 };
 705
 706 static struct file_system_type lustre_lite_fs_type = {
 707         name:           "lustre_lite",
 708         fs_flags:       0,
 709         read_super:     ll_read_super,
 710         owner:          THIS_MODULE,
 711 };
 712
 713 static int __init init_lustre_lite(void)
 714 {
 715         printk(KERN_INFO "Lustre Lite Client File System; "
 716                "info@clusterfs.com\n");
 717         ll_file_data_slab = kmem_cache_create("ll_file_data",
 718                                               sizeof(struct ll_file_data), 0,
 719                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 720         if (ll_file_data_slab == NULL)
 721                 return -ENOMEM;
 722
 723         proc_lustre_fs_root = proc_lustre_root ? proc_mkdir("llite", proc_lustre_root) : NULL;
 724
 725         return register_filesystem(&lustre_lite_fs_type);
 726 }
 727
 728 static void __exit exit_lustre_lite(void)
 729 {
 730         unregister_filesystem(&lustre_lite_fs_type);
 731         kmem_cache_destroy(ll_file_data_slab);
 732
 733         if (proc_lustre_fs_root) {
 734                 lprocfs_remove(proc_lustre_fs_root);
 735                 proc_lustre_fs_root = NULL;
 736         }
 737 }
 738
 739 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 740 MODULE_DESCRIPTION("Lustre Lite Client File System");
 741 MODULE_LICENSE("GPL");
 742
 743 module_init(init_lustre_lite);
 744 module_exit(exit_lustre_lite);
 745 #endif