lustre/llite/super25.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Lustre Light Super operations
   5  *
   6  *  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 #include <asm/statfs.h>
  38 kmem_cache_t *ll_file_data_slab;
  39 extern struct address_space_operations ll_aops;
  40 extern struct address_space_operations ll_dir_aops;
  41 struct super_operations ll_super_operations;
  42
  43 /* /proc/lustre/llite root that tracks llite mount points */
  44 struct proc_dir_entry *proc_lustre_fs_root = NULL;
  45 /* lproc_llite.c */
  46 extern int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  47                                        struct super_block *sb,
  48                                        char *osc, char *mdc);
  49
  50 extern int ll_init_inodecache(void);
  51 extern void ll_destroy_inodecache(void);
  52 extern int ll_recover(struct recovd_data *, int);
  53 extern int ll_commitcbd_setup(struct ll_sb_info *);
  54 extern int ll_commitcbd_cleanup(struct ll_sb_info *);
  55 int ll_read_inode2(struct inode *inode, void *opaque);
  56
  57 extern int ll_proc_namespace(struct super_block* sb, char* osc, char* mdc);
  58
  59 static char *ll_read_opt(const char *opt, char *data)
  60 {
  61         char *value;
  62         char *retval;
  63         ENTRY;
  64
  65         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  66         if (strncmp(opt, data, strlen(opt)))
  67                 RETURN(NULL);
  68         if ((value = strchr(data, '=')) == NULL)
  69                 RETURN(NULL);
  70
  71         value++;
  72         OBD_ALLOC(retval, strlen(value) + 1);
  73         if (!retval) {
  74                 CERROR("out of memory!\n");
  75                 RETURN(NULL);
  76         }
  77
  78         memcpy(retval, value, strlen(value)+1);
  79         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
  80         RETURN(retval);
  81 }
  82
  83 static int ll_set_opt(const char *opt, char *data, int fl)
  84 {
  85         ENTRY;
  86
  87         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
  88         if (strncmp(opt, data, strlen(opt)))
  89                 RETURN(0);
  90         else
  91                 RETURN(fl);
  92 }
  93
  94 static void ll_options(char *options, char **ost, char **mds, int *flags)
  95 {
  96         char *opt_ptr = options;
  97         char *this_char;
  98         ENTRY;
  99
 100         if (!options) {
 101                 EXIT;
 102                 return;
 103         }
 104
 105         while ((this_char = strsep (&opt_ptr, ",")) != NULL) {
 106                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
 107                 if ((!*ost && (*ost = ll_read_opt("osc", this_char)))||
 108                     (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
 109                     (!(*flags & LL_SBI_NOLCK) &&
 110                      ((*flags) = (*flags) |
 111                       ll_set_opt("nolock", this_char, LL_SBI_NOLCK))))
 112                         continue;
 113         }
 114         EXIT;
 115 }
 116
 117 #ifndef log2
 118 #define log2(n) ffz(~(n))
 119 #endif
 120
 121
 122 static int ll_fill_super(struct super_block *sb, void *data, int silent)
 123 {
 124         struct inode *root = 0;
 125         struct obd_device *obd;
 126         struct ll_sb_info *sbi;
 127         char *osc = NULL;
 128         char *mdc = NULL;
 129         int err;
 130         struct ll_fid rootfid;
 131         struct obd_statfs osfs;
 132         struct ptlrpc_request *request = NULL;
 133         struct ptlrpc_connection *mdc_conn;
 134         struct ll_read_inode2_cookie lic;
 135         class_uuid_t uuid;
 136         struct obd_uuid param_uuid;
 137
 138         ENTRY;
 139
 140         OBD_ALLOC(sbi, sizeof(*sbi));
 141         if (!sbi)
 142                 RETURN(-ENOMEM);
 143
 144         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 145         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 146         generate_random_uuid(uuid);
 147         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 148
 149         sb->s_fs_info = sbi;
 150
 151         ll_options(data, &osc, &mdc, &sbi->ll_flags);
 152
 153         if (!osc) {
 154                 CERROR("no osc\n");
 155                 GOTO(out_free, sb = NULL);
 156         }
 157
 158         if (!mdc) {
 159                 CERROR("no mdc\n");
 160                 GOTO(out_free, sb = NULL);
 161         }
 162
 163         strncpy(param_uuid.uuid, mdc, sizeof(param_uuid.uuid));
 164         obd = class_uuid2obd(&param_uuid);
 165         if (!obd) {
 166                 CERROR("MDC %s: not setup or attached\n", mdc);
 167                 GOTO(out_free, sb = NULL);
 168         }
 169
 170         err = obd_connect(&sbi->ll_mdc_conn, obd, &sbi->ll_sb_uuid,
 171                           ptlrpc_recovd, ll_recover);
 172         if (err) {
 173                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 174                 GOTO(out_free, sb = NULL);
 175         }
 176
 177         mdc_conn = sbi2mdc(sbi)->cl_import.imp_connection;
 178         list_add(&mdc_conn->c_sb_chain, &sbi->ll_conn_chain);
 179
 180         obd = class_uuid2obd(osc);
 181         if (!obd) {
 182                 CERROR("OSC %s: not setup or attached\n", osc);
 183                 GOTO(out_mdc, sb = NULL);
 184         }
 185
 186         err = obd_connect(&sbi->ll_osc_conn, obd, &sbi->ll_sb_uuid,
 187                           ptlrpc_recovd, ll_recover);
 188         if (err) {
 189                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 190                 GOTO(out_mdc, sb = NULL);
 191         }
 192
 193         err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 194         if (err) {
 195                 CERROR("cannot mds_connect: rc = %d\n", err);
 196                 GOTO(out_mdc, sb = NULL);
 197         }
 198         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 199         sbi->ll_rootino = rootfid.id;
 200
 201         memset(&osfs, 0, sizeof(osfs));
 202         err = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 203         sb->s_blocksize = osfs.os_bsize;
 204         sb->s_blocksize_bits = log2(osfs.os_bsize);
 205         sb->s_magic = LL_SUPER_MAGIC;
 206         sb->s_maxbytes = (1ULL << (32 + 9)) - osfs.os_bsize;
 207
 208         sb->s_op = &ll_super_operations;
 209
 210         /* make root inode */
 211         err = mdc_getattr(&sbi->ll_mdc_conn, sbi->ll_rootino, S_IFDIR,
 212                           OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
 213         if (err) {
 214                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 215                 GOTO(out_request, sb = NULL);
 216         }
 217
 218         /* initialize committed transaction callback daemon */
 219         spin_lock_init(&sbi->ll_commitcbd_lock);
 220         init_waitqueue_head(&sbi->ll_commitcbd_waitq);
 221         init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
 222         sbi->ll_commitcbd_flags = 0;
 223         err = ll_commitcbd_setup(sbi);
 224         if (err) {
 225                 CERROR("failed to start commit callback daemon: rc = %d\n",err);
 226                 GOTO(out_request, sb = NULL);
 227         }
 228
 229         lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0);
 230         lic.lic_lmm = NULL;
 231         root = iget5_locked(sb, sbi->ll_rootino, NULL,
 232                             ll_read_inode2, &lic);
 233
 234         if (root) {
 235                 sb->s_root = d_alloc_root(root);
 236                 root->i_state &= ~(I_LOCK | I_NEW);
 237         } else {
 238                 CERROR("lustre_lite: bad iget4 for root\n");
 239                 GOTO(out_cdb, sb = NULL);
 240         }
 241
 242         ptlrpc_req_finished(request);
 243         request = NULL;
 244
 245         if (proc_lustre_fs_root) {
 246                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 247                                                   osc, mdc);
 248                 if (err < 0)
 249                         CERROR("could not register mount in /proc/lustre");
 250         }
 251
 252 out_dev:
 253         if (mdc)
 254                 OBD_FREE(mdc, strlen(mdc) + 1);
 255         if (osc)
 256                 OBD_FREE(osc, strlen(osc) + 1);
 257
 258         RETURN(0);
 259
 260 out_cdb:
 261         ll_commitcbd_cleanup(sbi);
 262 out_request:
 263         ptlrpc_req_finished(request);
 264         obd_disconnect(&sbi->ll_osc_conn);
 265 out_mdc:
 266         obd_disconnect(&sbi->ll_mdc_conn);
 267 out_free:
 268         OBD_FREE(sbi, sizeof(*sbi));
 269
 270         goto out_dev;
 271 } /* ll_fill_super */
 272
 273 struct super_block * ll_get_sb(struct file_system_type *fs_type,
 274                                int flags, char *devname, void * data)
 275 {
 276         return get_sb_nodev(fs_type, flags, data, ll_fill_super);
 277 }
 278
 279 static void ll_put_super(struct super_block *sb)
 280 {
 281         struct ll_sb_info *sbi = ll_s2sbi(sb);
 282         struct list_head *tmp, *next;
 283         struct ll_fid rootfid;
 284         ENTRY;
 285
 286         list_del(&sbi->ll_conn_chain);
 287         ll_commitcbd_cleanup(sbi);
 288         obd_disconnect(&sbi->ll_osc_conn);
 289
 290         /* NULL request to force sync on the MDS, and get the last_committed
 291          * value to flush remaining RPCs from the pending queue on client.
 292          *
 293          * XXX This should be an mdc_sync() call to sync the whole MDS fs,
 294          *     which we can call for other reasons as well.
 295          */
 296         mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
 297
 298         if (sbi->ll_proc_root) {
 299                 lprocfs_remove(sbi->ll_proc_root);
 300         sbi->ll_proc_root = NULL;
 301         }
 302
 303         obd_disconnect(&sbi->ll_mdc_conn);
 304
 305         spin_lock(&dcache_lock);
 306         list_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list){
 307                 struct dentry *dentry = list_entry(tmp, struct dentry, d_hash);
 308                 shrink_dcache_parent(dentry);
 309         }
 310         spin_unlock(&dcache_lock);
 311
 312         OBD_FREE(sbi, sizeof(*sbi));
 313
 314         EXIT;
 315 } /* ll_put_super */
 316
 317 static void ll_clear_inode(struct inode *inode)
 318 {
 319         struct ll_sb_info *sbi = ll_i2sbi(inode);
 320         struct ll_inode_info *lli = ll_i2info(inode);
 321         int rc;
 322         ENTRY;
 323
 324 #warning "Is there a reason we don't do this in 2.5, but we do in 2.4?"
 325 #if 0
 326         rc = mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK);
 327         if (rc < 0) {
 328                 CERROR("mdc_cancel_unused: %d\n", rc);
 329                 /* XXX FIXME do something dramatic */
 330         }
 331
 332         if (lli->lli_smd) {
 333                 rc = obd_cancel_unused(&sbi->ll_osc_conn, lli->lli_smd, 0);
 334                 if (rc < 0) {
 335                         CERROR("obd_cancel_unused: %d\n", rc);
 336                         /* XXX FIXME do something dramatic */
 337                 }
 338         }
 339 #endif
 340
 341         if (atomic_read(&inode->i_count) != 0)
 342                 CERROR("clearing in-use inode %lu: count = %d\n",
 343                        inode->i_ino, atomic_read(&inode->i_count));
 344
 345         if (lli->lli_smd)
 346                 obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd);
 347
 348         if (lli->lli_symlink_name) {
 349                 OBD_FREE(lli->lli_symlink_name,strlen(lli->lli_symlink_name)+1);
 350                 lli->lli_symlink_name = NULL;
 351         }
 352
 353         EXIT;
 354 }
 355
 356 #if 0
 357 static void ll_delete_inode(struct inode *inode)
 358 {
 359         ENTRY;
 360         if (S_ISREG(inode->i_mode)) {
 361                 int err;
 362                 struct obdo *oa;
 363                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 364
 365                 /* mcreate with no open */
 366                 if (!lsm)
 367                         GOTO(out, 0);
 368
 369                 if (lsm->lsm_object_id == 0) {
 370                         CERROR("This really happens\n");
 371                         /* No obdo was ever created */
 372                         GOTO(out, 0);
 373                 }
 374
 375                 oa = obdo_alloc();
 376                 if (oa == NULL)
 377                         GOTO(out, -ENOMEM);
 378
 379                 oa->o_id = lsm->lsm_object_id;
 380                 oa->o_mode = inode->i_mode;
 381                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
 382
 383                 err = obd_destroy(ll_i2obdconn(inode), oa, lsm);
 384                 obdo_free(oa);
 385                 if (err)
 386                         CDEBUG(D_SUPER, "obd destroy objid "LPX64" error %d\n",
 387                                lsm->lsm_object_id, err);
 388         }
 389 out:
 390         clear_inode(inode);
 391         EXIT;
 392 }
 393 #endif
 394
 395 /* like inode_setattr, but doesn't mark the inode dirty */
 396 static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc)
 397 {
 398         unsigned int ia_valid = attr->ia_valid;
 399         int error = 0;
 400
 401         if ((ia_valid & ATTR_SIZE) && trunc) {
 402                 error = vmtruncate(inode, attr->ia_size);
 403                 if (error)
 404                         goto out;
 405         } else if (ia_valid & ATTR_SIZE)
 406                 inode->i_size = attr->ia_size;
 407
 408         if (ia_valid & ATTR_UID)
 409                 inode->i_uid = attr->ia_uid;
 410         if (ia_valid & ATTR_GID)
 411                 inode->i_gid = attr->ia_gid;
 412         if (ia_valid & ATTR_ATIME)
 413                 inode->i_atime = attr->ia_atime;
 414         if (ia_valid & ATTR_MTIME)
 415                 inode->i_mtime = attr->ia_mtime;
 416         if (ia_valid & ATTR_CTIME)
 417                 inode->i_ctime = attr->ia_ctime;
 418         if (ia_valid & ATTR_MODE) {
 419                 inode->i_mode = attr->ia_mode;
 420                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 421                         inode->i_mode &= ~S_ISGID;
 422         }
 423 out:
 424         return error;
 425 }
 426
 427 int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
 428 {
 429         struct ptlrpc_request *request = NULL;
 430         struct ll_sb_info *sbi = ll_i2sbi(inode);
 431         int err = 0;
 432
 433         ENTRY;
 434
 435         /* change incore inode */
 436         ll_attr2inode(inode, attr, do_trunc);
 437
 438         /* Don't send size changes to MDS to avoid "fast EA" problems, and
 439          * also avoid a pointless RPC (we get file size from OST anyways).
 440          */
 441         attr->ia_valid &= ~ATTR_SIZE;
 442         if (attr->ia_valid) {
 443                 err = mdc_setattr(&sbi->ll_mdc_conn, inode, attr, NULL, 0,
 444                                   &request);
 445                 if (err)
 446                         CERROR("mdc_setattr fails: err = %d\n", err);
 447
 448                 ptlrpc_req_finished(request);
 449                 if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) {
 450                         struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 451                         struct obdo oa;
 452                         int err2;
 453
 454                         CDEBUG(D_ERROR, "setting mtime on OST\n");
 455                         oa.o_id = lsm->lsm_object_id;
 456                         oa.o_mode = S_IFREG;
 457                         oa.o_valid = OBD_MD_FLID |OBD_MD_FLTYPE |OBD_MD_FLMTIME;
 458                         oa.o_mtime = attr->ia_mtime.tv_sec;
 459                         err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL);
 460                         if (err2) {
 461                                 CERROR("obd_setattr fails: rc=%d\n", err);
 462                                 if (!err)
 463                                         err = err2;
 464                         }
 465                 }
 466         }
 467
 468         RETURN(err);
 469 }
 470
 471 int ll_setattr(struct dentry *de, struct iattr *attr)
 472 {
 473         int rc = inode_change_ok(de->d_inode, attr);
 474
 475         if (rc)
 476                 return rc;
 477
 478         return ll_inode_setattr(de->d_inode, attr, 1);
 479 }
 480
 481 static int ll_statfs(struct super_block *sb, struct statfs *sfs)
 482 {
 483         struct ll_sb_info *sbi = ll_s2sbi(sb);
 484         struct obd_statfs osfs;
 485         int rc;
 486         ENTRY;
 487
 488         memset(sfs, 0, sizeof(*sfs));
 489         rc = obd_statfs(&sbi->ll_mdc_conn, &osfs);
 490         statfs_unpack(sfs, &osfs);
 491         if (rc)
 492                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 493         else
 494                 CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
 495                        " objects "LPU64"/"LPU64"\n",
 496                        osfs.os_bavail, osfs.os_blocks,
 497                        osfs.os_ffree, osfs.os_files);
 498
 499         /* temporary until mds_statfs returns statfs info for all OSTs */
 500         if (!rc) {
 501                 rc = obd_statfs(&sbi->ll_osc_conn, &osfs);
 502                 if (rc) {
 503                         CERROR("obd_statfs fails: rc = %d\n", rc);
 504                         GOTO(out, rc);
 505                 }
 506                 CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
 507                        " objects "LPU64"/"LPU64"\n",
 508                        osfs.os_bavail, osfs.os_blocks,
 509                        osfs.os_ffree, osfs.os_files);
 510
 511                 while (osfs.os_blocks > ~0UL) {
 512                         sfs->f_bsize <<= 1;
 513
 514                         osfs.os_blocks >>= 1;
 515                         osfs.os_bfree >>= 1;
 516                         osfs.os_bavail >>= 1;
 517                 }
 518                 sfs->f_blocks = osfs.os_blocks;
 519                 sfs->f_bfree = osfs.os_bfree;
 520                 sfs->f_bavail = osfs.os_bavail;
 521                 if (osfs.os_ffree < (__u64)sfs->f_ffree)
 522                         sfs->f_ffree = osfs.os_ffree;
 523         }
 524
 525 out:
 526         RETURN(rc);
 527 }
 528
 529 void ll_update_inode(struct inode *inode, struct mds_body *body,
 530                      struct lov_mds_md *lmm)
 531 {
 532         struct ll_inode_info *lli = ll_i2info(inode);
 533
 534         if (lmm != NULL)
 535                 obd_unpackmd(ll_i2obdconn(inode), &lli->lli_smd, lmm);
 536
 537         if (body->valid & OBD_MD_FLID)
 538                 inode->i_ino = body->ino;
 539         if (body->valid & OBD_MD_FLATIME)
 540                 inode->i_atime.tv_sec = body->atime;
 541         if (body->valid & OBD_MD_FLMTIME)
 542                 inode->i_mtime.tv_sec = body->mtime;
 543         if (body->valid & OBD_MD_FLCTIME)
 544                 inode->i_ctime.tv_sec = body->ctime;
 545         if (body->valid & OBD_MD_FLMODE)
 546                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
 547         if (body->valid & OBD_MD_FLTYPE)
 548                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
 549         if (body->valid & OBD_MD_FLUID)
 550                 inode->i_uid = body->uid;
 551         if (body->valid & OBD_MD_FLGID)
 552                 inode->i_gid = body->gid;
 553         if (body->valid & OBD_MD_FLFLAGS)
 554                 inode->i_flags = body->flags;
 555         if (body->valid & OBD_MD_FLNLINK)
 556                 inode->i_nlink = body->nlink;
 557         if (body->valid & OBD_MD_FLGENER)
 558                 inode->i_generation = body->generation;
 559         if (body->valid & OBD_MD_FLRDEV)
 560                 inode->i_rdev = to_kdev_t(body->rdev);
 561         if (body->valid & OBD_MD_FLSIZE)
 562                 inode->i_size = body->size;
 563         if (body->valid & OBD_MD_FLBLOCKS)
 564                 inode->i_blocks = body->blocks;
 565 }
 566
 567 int ll_read_inode2(struct inode *inode, void *opaque)
 568 {
 569         struct ll_read_inode2_cookie *lic = opaque;
 570         struct mds_body *body = lic->lic_body;
 571         struct ll_inode_info *lli = ll_i2info(inode);
 572         int rc = 0;
 573         ENTRY;
 574
 575         sema_init(&lli->lli_open_sem, 1);
 576         lli->flags = 0;
 577         init_MUTEX(&lli->lli_getattr_sem);
 578         /* these are 2.4 only, but putting them here for consistency.. */
 579         spin_lock_init(&lli->lli_read_extent_lock);
 580         INIT_LIST_HEAD(&lli->lli_read_extents);
 581
 582         LASSERT(!lli->lli_smd);
 583
 584         /* core attributes first */
 585         ll_update_inode(inode, body, lic ? lic->lic_lmm : NULL);
 586
 587         /* Get the authoritative file size */
 588         if (lli->lli_smd && S_ISREG(inode->i_mode)) {
 589                 struct ll_file_data *fd = file->private_data;
 590                 struct ldlm_extent extent = {0, OBD_OBJECT_EOF};
 591                 struct lustre_handle lockh = {0, 0};
 592
 593                 LASSERT(lli->lli_smd->lsm_object_id != 0);
 594
 595                 rc = ll_extent_lock(fd, inode, lsm, LCK_PR, &extent, &lockh);
 596                 if (err != ELDLM_OK && err != ELDLM_MATCHED) {
 597                         ll_clear_inode(inode);
 598                         make_bad_inode(inode);
 599                 } else {
 600                         l_extent_unlock(fd, inode, lsm, LCK_PR, &extent,
 601                                         &lockh);
 602                 }
 603         }
 604
 605         /* OIDEBUG(inode); */
 606
 607         if (S_ISREG(inode->i_mode)) {
 608                 inode->i_op = &ll_file_inode_operations;
 609                 inode->i_fop = &ll_file_operations;
 610                 inode->i_mapping->a_ops = &ll_aops;
 611                 EXIT;
 612         } else if (S_ISDIR(inode->i_mode)) {
 613                 inode->i_op = &ll_dir_inode_operations;
 614                 inode->i_fop = &ll_dir_operations;
 615                 inode->i_mapping->a_ops = &ll_dir_aops;
 616                 EXIT;
 617         } else if (S_ISLNK(inode->i_mode)) {
 618                 inode->i_op = &ll_fast_symlink_inode_operations;
 619                 EXIT;
 620         } else {
 621                 init_special_inode(inode, inode->i_mode,
 622                                    kdev_t_to_nr(inode->i_rdev));
 623                 EXIT;
 624         }
 625
 626         return rc;
 627 }
 628
 629 static inline void invalidate_request_list(struct list_head *req_list)
 630 {
 631         struct list_head *tmp, *n;
 632         list_for_each_safe(tmp, n, req_list) {
 633                 struct ptlrpc_request *req =
 634                         list_entry(tmp, struct ptlrpc_request, rq_list);
 635                 CERROR("invalidating req xid %d op %d to %s:%d\n",
 636                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 637                        req->rq_connection->c_remote_uuid,
 638                        req->rq_import->imp_client->cli_request_portal);
 639                 req->rq_flags |= PTL_RPC_FL_ERR;
 640                 wake_up(&req->rq_wait_for_rep);
 641         }
 642 }
 643
 644 void ll_umount_begin(struct super_block *sb)
 645 {
 646         struct ll_sb_info *sbi = ll_s2sbi(sb);
 647         struct list_head *ctmp;
 648
 649         ENTRY;
 650
 651         list_for_each(ctmp, &sbi->ll_conn_chain) {
 652                 struct ptlrpc_connection *conn;
 653                 conn = list_entry(ctmp, struct ptlrpc_connection, c_sb_chain);
 654
 655                 spin_lock(&conn->c_lock);
 656                 conn->c_flags |= CONN_INVALID;
 657                 /*invalidate_request_list(&conn->c_sending_head);*/
 658                 invalidate_request_list(&conn->c_delayed_head);
 659                 spin_unlock(&conn->c_lock);
 660         }
 661
 662         EXIT;
 663 }
 664
 665
 666 static kmem_cache_t *ll_inode_cachep;
 667
 668 static struct inode *ll_alloc_inode(struct super_block *sb)
 669 {
 670         struct ll_inode_info *lli;
 671         lli = kmem_cache_alloc(ll_inode_cachep, SLAB_KERNEL);
 672         if (!lli)
 673                 return NULL;
 674
 675         memset(lli, 0, (char *)&lli->lli_vfs_inode - (char *)lli);
 676         sema_init(&lli->lli_open_sem, 1);
 677         init_MUTEX(&lli->lli_size_valid_sem);
 678
 679         return &lli->lli_vfs_inode;
 680 }
 681
 682 static void ll_destroy_inode(struct inode *inode)
 683 {
 684         kmem_cache_free(ll_inode_cachep, ll_i2info(inode));
 685 }
 686
 687 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
 688 {
 689         struct ll_inode_info *lli = foo;
 690
 691         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
 692             SLAB_CTOR_CONSTRUCTOR)
 693                 inode_init_once(&lli->lli_vfs_inode);
 694 }
 695
 696 int ll_init_inodecache(void)
 697 {
 698         ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
 699                                             sizeof(struct ll_inode_info),
 700                                             0, SLAB_HWCACHE_ALIGN,
 701                                             init_once, NULL);
 702         if (ll_inode_cachep == NULL)
 703                 return -ENOMEM;
 704         return 0;
 705 }
 706
 707 void ll_destroy_inodecache(void)
 708 {
 709         if (kmem_cache_destroy(ll_inode_cachep))
 710                 CERROR("ll_inode_cache: not all structures were freed\n");
 711 }
 712
 713
 714
 715 /* exported operations */
 716 struct super_operations ll_super_operations =
 717 {
 718         alloc_inode: ll_alloc_inode,
 719         destroy_inode: ll_destroy_inode,
 720         clear_inode: ll_clear_inode,
 721 //        delete_inode: ll_delete_inode,
 722         put_super: ll_put_super,
 723         statfs: ll_statfs,
 724         umount_begin: ll_umount_begin
 725 };
 726
 727
 728 struct file_system_type lustre_lite_fs_type = {
 729         .owner  = THIS_MODULE,
 730         .name =   "lustre_lite",
 731         .get_sb = ll_get_sb,
 732         .kill_sb = kill_anon_super,
 733 };
 734
 735 static int __init init_lustre_lite(void)
 736 {
 737         int rc;
 738         printk(KERN_INFO "Lustre Lite Client File System; "
 739                "info@clusterfs.com\n");
 740         rc = ll_init_inodecache();
 741         if (rc)
 742                 return -ENOMEM;
 743         ll_file_data_slab = kmem_cache_create("ll_file_data",
 744                                               sizeof(struct ll_file_data), 0,
 745                                               SLAB_HWCACHE_ALIGN, NULL, NULL);
 746         if (ll_file_data_slab == NULL) {
 747                 ll_destroy_inodecache();
 748                 return -ENOMEM;
 749         }
 750
 751         proc_lustre_fs_root = proc_lustre_root ?
 752                               proc_mkdir("llite", proc_lustre_root) : NULL;
 753
 754         return register_filesystem(&lustre_lite_fs_type);
 755 }
 756
 757 static void __exit exit_lustre_lite(void)
 758 {
 759         unregister_filesystem(&lustre_lite_fs_type);
 760         ll_destroy_inodecache();
 761         kmem_cache_destroy(ll_file_data_slab);
 762         if (proc_lustre_fs_root) {
 763                 lprocfs_remove(proc_lustre_fs_root);
 764                 proc_lustre_fs_root = NULL;
 765         }
 766 }
 767
 768 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 769 MODULE_DESCRIPTION("Lustre Lite Client File System");
 770 MODULE_LICENSE("GPL");
 771
 772 module_init(init_lustre_lite);
 773 module_exit(exit_lustre_lite);
 774 #endif