lustre/llite/llite_lib.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) 2002-2005 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/types.h>
  28 #include <linux/random.h>
  29 #include <linux/version.h>
  30
  31 #include <linux/lustre_lite.h>
  32 #include <linux/lustre_ha.h>
  33 #include <linux/lustre_ver.h>
  34 #include <linux/lustre_dlm.h>
  35 #include <linux/lprocfs_status.h>
  36 #include <linux/lustre_disk.h>
  37 #include "llite_internal.h"
  38
  39 kmem_cache_t *ll_file_data_slab;
  40
  41 LIST_HEAD(ll_super_blocks);
  42 spinlock_t ll_sb_lock = SPIN_LOCK_UNLOCKED;
  43
  44 extern struct address_space_operations ll_aops;
  45 extern struct address_space_operations ll_dir_aops;
  46
  47 #ifndef log2
  48 #define log2(n) ffz(~(n))
  49 #endif
  50
  51 /* We need to have some extra twiddling here because some systems have
  52  * no random state when they start up. */
  53 static void
  54 lustre_generate_random_uuid(class_uuid_t uuid)
  55 {
  56         struct timeval t;
  57         int *i, j, k;
  58
  59         ENTRY;
  60         LASSERT(sizeof(class_uuid_t) % sizeof(*i) == 0);
  61
  62         j = jiffies;
  63         do_gettimeofday(&t);
  64         k = t.tv_usec;
  65
  66         generate_random_uuid(uuid);
  67
  68         for (i = (int *)uuid; (char *)i < (char *)uuid + sizeof(class_uuid_t); i++) {
  69                 *i ^= j ^ k;
  70                 j = ((j << 8) & 0xffffff00) | ((j >> 24) & 0x000000ff);
  71                 k = ((k >> 8) & 0x00ffffff) | ((k << 24) & 0xff000000);
  72         }
  73
  74         EXIT;
  75 }
  76
  77 struct ll_sb_info *ll_init_sbi(void)
  78 {
  79         struct ll_sb_info *sbi = NULL;
  80         class_uuid_t uuid;
  81         ENTRY;
  82
  83         OBD_ALLOC(sbi, sizeof(*sbi));
  84         if (!sbi)
  85                 RETURN(NULL);
  86
  87         spin_lock_init(&sbi->ll_lock);
  88         spin_lock_init(&sbi->ll_lco.lco_lock);
  89         INIT_LIST_HEAD(&sbi->ll_pglist);
  90         sbi->ll_pglist_gen = 0;
  91         if (num_physpages >> (20 - PAGE_SHIFT) < 512)
  92                 sbi->ll_async_page_max = num_physpages / 2;
  93         else
  94                 sbi->ll_async_page_max = (num_physpages / 4) * 3;
  95         sbi->ll_ra_info.ra_max_pages = min(num_physpages / 8,
  96                                            SBI_DEFAULT_READAHEAD_MAX);
  97
  98         INIT_LIST_HEAD(&sbi->ll_conn_chain);
  99         INIT_HLIST_HEAD(&sbi->ll_orphan_dentry_list);
 100
 101         lustre_generate_random_uuid(uuid);
 102         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 103         CDEBUG(D_HA, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 104
 105         spin_lock(&ll_sb_lock);
 106         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 107         spin_unlock(&ll_sb_lock);
 108         RETURN(sbi);
 109 }
 110
 111 void ll_free_sbi(struct super_block *sb)
 112 {
 113         struct ll_sb_info *sbi = ll_s2sbi(sb);
 114         ENTRY;
 115
 116         if (sbi != NULL) {
 117                 spin_lock(&ll_sb_lock);
 118                 list_del(&sbi->ll_list);
 119                 spin_unlock(&ll_sb_lock);
 120                 OBD_FREE(sbi, sizeof(*sbi));
 121         }
 122         EXIT;
 123 }
 124
 125 int client_common_fill_super(struct super_block *sb, char *mdc, char *osc)
 126 {
 127         struct inode *root = 0;
 128         struct ll_sb_info *sbi = ll_s2sbi(sb);
 129         struct obd_device *obd;
 130         struct ll_fid rootfid;
 131         struct obd_statfs osfs;
 132         struct ptlrpc_request *request = NULL;
 133         struct lustre_handle osc_conn = {0, };
 134         struct lustre_handle mdc_conn = {0, };
 135         struct lustre_md md;
 136         struct obd_connect_data *data = NULL;
 137         int err;
 138         ENTRY;
 139
 140         obd = class_name2obd(mdc);
 141         if (!obd) {
 142                 CERROR("MDC %s: not setup or attached\n", mdc);
 143                 RETURN(-EINVAL);
 144         }
 145
 146         OBD_ALLOC(data, sizeof(*data));
 147         if (data == NULL)
 148                 RETURN(-ENOMEM);
 149
 150         if (proc_lustre_fs_root) {
 151                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 152                                                   osc, mdc);
 153                 if (err < 0)
 154                         CERROR("could not register mount in /proc/lustre");
 155         }
 156
 157         if (sb->s_flags & MS_RDONLY)
 158                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 159
 160         if (sbi->ll_flags & LL_SBI_FLOCK) {
 161                 sbi->ll_fop = &ll_file_operations_flock;
 162         } else {
 163                 sbi->ll_fop = &ll_file_operations;
 164         }
 165
 166         data->ocd_connect_flags |= OBD_CONNECT_VERSION;
 167         data->ocd_version = LUSTRE_VERSION_CODE;
 168         err = obd_connect(&mdc_conn, obd, &sbi->ll_sb_uuid, data);
 169         if (err == -EBUSY) {
 170                 CERROR("An MDT (mdc %s) is performing recovery, of which this"
 171                        " client is not a part.  Please wait for recovery to "
 172                        "complete, abort, or time out.\n", mdc);
 173                 GOTO(out, err);
 174         } else if (err) {
 175                 CERROR("cannot connect to %s: rc = %d\n", mdc, err);
 176                 GOTO(out, err);
 177         }
 178         sbi->ll_mdc_exp = class_conn2export(&mdc_conn);
 179
 180         err = obd_statfs(obd, &osfs, jiffies - HZ);
 181         if (err)
 182                 GOTO(out_mdc, err);
 183
 184         LASSERT(osfs.os_bsize);
 185         sb->s_blocksize = osfs.os_bsize;
 186         sb->s_blocksize_bits = log2(osfs.os_bsize);
 187         sb->s_magic = LL_SUPER_MAGIC;
 188         sb->s_maxbytes = PAGE_CACHE_MAXBYTES;
 189         sbi->ll_namelen = osfs.os_namelen;
 190
 191 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
 192         /* We set sb->s_dev equal on all lustre clients in order to support
 193          * NFS export clustering.  NFSD requires that the FSID be the same
 194          * on all clients. */
 195         /* s_dev is also used in lt_compare() to compare two fs, but that is
 196          * only a node-local comparison. */
 197         sb->s_dev = get_uuid2int(sbi2mdc(sbi)->cl_import->imp_target_uuid.uuid,
 198                          strlen(sbi2mdc(sbi)->cl_import->imp_target_uuid.uuid));
 199 #endif
 200
 201         obd = class_name2obd(osc);
 202         if (!obd) {
 203                 CERROR("OSC %s: not setup or attached\n", osc);
 204                 GOTO(out_mdc, err);
 205         }
 206
 207         data->ocd_connect_flags =
 208                 OBD_CONNECT_GRANT|OBD_CONNECT_VERSION|OBD_CONNECT_REQPORTAL;
 209
 210         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 211                "ocd_grant: %d\n", data->ocd_connect_flags,
 212                data->ocd_version, data->ocd_grant);
 213
 214         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 215         obd->obd_upcall.onu_upcall = ll_ocd_update;
 216
 217         err = obd_connect(&osc_conn, obd, &sbi->ll_sb_uuid, data);
 218         if (err == -EBUSY) {
 219                 CERROR("An OST (osc %s) is performing recovery, of which this"
 220                        " client is not a part.  Please wait for recovery to "
 221                        "complete, abort, or time out.\n", osc);
 222                 GOTO(out, err);
 223         } else if (err) {
 224                 CERROR("cannot connect to %s: rc = %d\n", osc, err);
 225                 GOTO(out_mdc, err);
 226         }
 227         sbi->ll_osc_exp = class_conn2export(&osc_conn);
 228         spin_lock(&sbi->ll_lco.lco_lock);
 229         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 230         spin_unlock(&sbi->ll_lco.lco_lock);
 231
 232         mdc_init_ea_size(sbi->ll_mdc_exp, sbi->ll_osc_exp);
 233
 234         if (!ll_async_page_slab) {
 235                 ll_async_page_slab_size =
 236                         size_round(sizeof(struct ll_async_page)) +
 237                         obd_prep_async_page(sbi->ll_osc_exp, NULL, NULL, NULL,
 238                                             0, NULL, NULL, NULL);
 239                 ll_async_page_slab = kmem_cache_create("ll_async_page",
 240                                                        ll_async_page_slab_size,
 241                                                        0, 0, NULL, NULL);
 242                 if (!ll_async_page_slab)
 243                         GOTO(out_osc, -ENOMEM);
 244         }
 245
 246         err = mdc_getstatus(sbi->ll_mdc_exp, &rootfid);
 247         if (err) {
 248                 CERROR("cannot mds_connect: rc = %d\n", err);
 249                 GOTO(out_osc, err);
 250         }
 251         CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
 252         sbi->ll_rootino = rootfid.id;
 253
 254         sb->s_op = &lustre_super_operations;
 255
 256         /* make root inode
 257          * XXX: move this to after cbd setup? */
 258         err = mdc_getattr(sbi->ll_mdc_exp, &rootfid,
 259                           OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS, 0, &request);
 260         if (err) {
 261                 CERROR("mdc_getattr failed for root: rc = %d\n", err);
 262                 GOTO(out_osc, err);
 263         }
 264
 265         err = mdc_req2lustre_md(request, 0, sbi->ll_osc_exp, &md);
 266         if (err) {
 267                 CERROR("failed to understand root inode md: rc = %d\n",err);
 268                 ptlrpc_req_finished (request);
 269                 GOTO(out_osc, err);
 270         }
 271
 272         LASSERT(sbi->ll_rootino != 0);
 273         root = ll_iget(sb, sbi->ll_rootino, &md);
 274
 275         ptlrpc_req_finished(request);
 276
 277         if (root == NULL || is_bad_inode(root)) {
 278                 if (md.lsm != NULL)
 279                         obd_free_memmd(sbi->ll_osc_exp, &md.lsm);
 280                 CERROR("lustre_lite: bad iget4 for root\n");
 281                 GOTO(out_root, err = -EBADF);
 282         }
 283
 284         err = ll_close_thread_start(&sbi->ll_lcq);
 285         if (err) {
 286                 CERROR("cannot start close thread: rc %d\n", err);
 287                 GOTO(out_root, err);
 288         }
 289
 290         /* making vm readahead 0 for 2.4.x. In the case of 2.6.x,
 291            backing dev info assigned to inode mapping is used for
 292            determining maximal readahead. */
 293 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \
 294     !defined(KERNEL_HAS_AS_MAX_READAHEAD)
 295         /* bug 2805 - set VM readahead to zero */
 296         vm_max_readahead = vm_min_readahead = 0;
 297 #endif
 298
 299         sb->s_root = d_alloc_root(root);
 300         if (data != NULL)
 301                 OBD_FREE(data, sizeof(*data));
 302         RETURN(err);
 303
 304 out_root:
 305         if (root)
 306                 iput(root);
 307 out_osc:
 308         obd_disconnect(sbi->ll_osc_exp);
 309 out_mdc:
 310         obd_disconnect(sbi->ll_mdc_exp);
 311 out:
 312         if (data != NULL)
 313                 OBD_FREE(data, sizeof(*data));
 314         lprocfs_unregister_mountpoint(sbi);
 315         RETURN(err);
 316 }
 317
 318 void ll_dump_inode(struct inode *inode)
 319 {
 320         struct list_head *tmp;
 321         int dentry_count = 0;
 322
 323         LASSERT(inode != NULL);
 324
 325         list_for_each(tmp, &inode->i_dentry)
 326                 dentry_count++;
 327
 328         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 329                inode, ll_i2mdcexp(inode)->exp_obd->obd_name, inode->i_ino,
 330                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 331 }
 332
 333 void lustre_dump_dentry(struct dentry *dentry, int recur)
 334 {
 335         struct list_head *tmp;
 336         int subdirs = 0;
 337
 338         LASSERT(dentry != NULL);
 339
 340         list_for_each(tmp, &dentry->d_subdirs)
 341                 subdirs++;
 342
 343         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 344                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 345                dentry->d_name.len, dentry->d_name.name,
 346                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 347                dentry->d_parent, dentry->d_inode, atomic_read(&dentry->d_count),
 348                dentry->d_flags, dentry->d_fsdata, subdirs);
 349         if (dentry->d_inode != NULL)
 350                 ll_dump_inode(dentry->d_inode);
 351
 352         if (recur == 0)
 353                 return;
 354
 355         list_for_each(tmp, &dentry->d_subdirs) {
 356                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
 357                 lustre_dump_dentry(d, recur - 1);
 358         }
 359 }
 360
 361 void client_common_put_super(struct super_block *sb)
 362 {
 363         struct ll_sb_info *sbi = ll_s2sbi(sb);
 364         struct hlist_node *tmp, *next;
 365         ENTRY;
 366
 367         ll_close_thread_shutdown(sbi->ll_lcq);
 368
 369         list_del(&sbi->ll_conn_chain);
 370         obd_disconnect(sbi->ll_osc_exp);
 371
 372         lprocfs_unregister_mountpoint(sbi);
 373         if (sbi->ll_proc_root) {
 374                 lprocfs_remove(sbi->ll_proc_root);
 375                 sbi->ll_proc_root = NULL;
 376         }
 377
 378         obd_disconnect(sbi->ll_mdc_exp);
 379
 380         // We do this to get rid of orphaned dentries. That is not really trw.
 381         hlist_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list) {
 382                 struct dentry *dentry = hlist_entry(tmp, struct dentry, d_hash);
 383                 CWARN("found orphan dentry %.*s (%p->%p) at unmount, dumping "
 384                       "before and after shrink_dcache_parent\n",
 385                       dentry->d_name.len, dentry->d_name.name, dentry, next);
 386                 lustre_dump_dentry(dentry, 1);
 387                 shrink_dcache_parent(dentry);
 388                 lustre_dump_dentry(dentry, 1);
 389         }
 390         EXIT;
 391 }
 392
 393 char *ll_read_opt(const char *opt, char *data)
 394 {
 395         char *value;
 396         char *retval;
 397         ENTRY;
 398
 399         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 400         if (strncmp(opt, data, strlen(opt)))
 401                 RETURN(NULL);
 402         if ((value = strchr(data, '=')) == NULL)
 403                 RETURN(NULL);
 404
 405         value++;
 406         OBD_ALLOC(retval, strlen(value) + 1);
 407         if (!retval) {
 408                 CERROR("out of memory!\n");
 409                 RETURN(NULL);
 410         }
 411
 412         memcpy(retval, value, strlen(value)+1);
 413         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 414         RETURN(retval);
 415 }
 416
 417 int ll_set_opt(const char *opt, char *data, int fl)
 418 {
 419         ENTRY;
 420
 421         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 422         if (strncmp(opt, data, strlen(opt)))
 423                 RETURN(0);
 424         else
 425                 RETURN(fl);
 426 }
 427
 428 void ll_options(char *options, int *flags)
 429 {
 430         int tmp;
 431         char *this_char;
 432 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
 433         char *opt_ptr = options;
 434 #endif
 435         ENTRY;
 436
 437         if (!options) {
 438                 EXIT;
 439                 return;
 440         }
 441
 442         CERROR("Parsing opts %s\n", options);
 443 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 444         for (this_char = strtok (options, ",");
 445              this_char != NULL;
 446              this_char = strtok (NULL, ","))
 447 #else
 448         while ((this_char = strsep (&opt_ptr, ",")) != NULL)
 449 #endif
 450         {
 451                 CDEBUG(D_SUPER, "this_char %s\n", this_char);
 452                 tmp = ll_set_opt("nolock", this_char, LL_SBI_NOLCK);
 453                 if (tmp) {
 454                         *flags |= tmp;
 455                         continue;
 456                 }
 457                 tmp = ll_set_opt("flock", this_char, LL_SBI_FLOCK);
 458                 if (tmp) {
 459                         *flags |= tmp;
 460                         continue;
 461                 }
 462                 tmp = ll_set_opt("noflock", this_char, LL_SBI_FLOCK);
 463                 if (tmp) {
 464                         *flags &= ~tmp;
 465                         continue;
 466                 }
 467                 tmp = ll_set_opt("user_xattr", this_char, LL_SBI_USER_XATTR);
 468                 if (tmp) {
 469                         *flags |= tmp;
 470                         continue;
 471                 }
 472                 tmp = ll_set_opt("nouser_xattr", this_char, LL_SBI_USER_XATTR);
 473                 if (tmp) {
 474                         *flags &= ~tmp;
 475                         continue;
 476                 }
 477         }
 478         CERROR("flags %#x\n", *flags);
 479
 480         EXIT;
 481 }
 482
 483 void ll_lli_init(struct ll_inode_info *lli)
 484 {
 485         sema_init(&lli->lli_open_sem, 1);
 486         sema_init(&lli->lli_size_sem, 1);
 487         lli->lli_flags = 0;
 488         lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
 489         spin_lock_init(&lli->lli_lock);
 490         INIT_LIST_HEAD(&lli->lli_pending_write_llaps);
 491         lli->lli_inode_magic = LLI_INODE_MAGIC;
 492 }
 493
 494 int ll_fill_super(struct super_block *sb)
 495 {
 496         struct lustre_profile *lprof;
 497         struct lustre_sb_info *lsi = s2lsi(sb);
 498         struct ll_sb_info *sbi;
 499         char  *osc = NULL;
 500         char  *mdc = NULL;
 501         char  *profilenm = get_profile_name(sb);
 502         struct config_llog_instance cfg;
 503         char   ll_instance[sizeof(sb) * 2 + 1];
 504         int    err;
 505         ENTRY;
 506
 507         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 508
 509         /* client additional sb info */
 510         lsi->lsi_llsbi = sbi = ll_init_sbi();
 511         if (!sbi)
 512                 RETURN(-ENOMEM);
 513
 514         ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 515
 516         /* Generate a string unique to this super, in case some joker tries
 517            to mount the same fs at two mount points.
 518            Use the address of the super itself.*/
 519         sprintf(ll_instance, "%p", sb);
 520         cfg.cfg_instance = ll_instance;
 521         cfg.cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 522
 523         /* set up client obds */
 524         err = lustre_get_process_log(sb, profilenm, &cfg);
 525         if (err < 0) {
 526                 CERROR("Unable to process log: %d\n", err);
 527                 GOTO(out_free, err);
 528         }
 529
 530         lprof = class_get_profile(profilenm);
 531         if (lprof == NULL) {
 532                 CERROR("No profile found: %s\n", profilenm);
 533                 GOTO(out_free, err = -EINVAL);
 534         }
 535         CERROR("Found profile %s: mdc=%s osc=%s\n", profilenm,
 536                lprof->lp_mdc, lprof->lp_osc);
 537
 538         OBD_ALLOC(osc, strlen(lprof->lp_osc) +
 539                   strlen(ll_instance) + 2);
 540         if (!osc)
 541                 GOTO(out_free, err = -ENOMEM);
 542         sprintf(osc, "%s-%s", lprof->lp_osc, ll_instance);
 543
 544         OBD_ALLOC(mdc, strlen(lprof->lp_mdc) +
 545                   strlen(ll_instance) + 2);
 546         if (!mdc)
 547                 GOTO(out_free, err = -ENOMEM);
 548         sprintf(mdc, "%s-%s", lprof->lp_mdc, ll_instance);
 549
 550         /* connections, registrations, sb setup */
 551         err = client_common_fill_super(sb, mdc, osc);
 552
 553 out_free:
 554         if (mdc)
 555                 OBD_FREE(mdc, strlen(mdc) + 1);
 556         if (osc)
 557                 OBD_FREE(osc, strlen(osc) + 1);
 558         if (err) {
 559                 struct obd_device *obd;
 560                 int next = 0;
 561                 /* like client_put_super below */
 562                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next))
 563                        != NULL) {
 564                         class_manual_cleanup(obd);
 565                 }
 566                 class_del_profile(profilenm);
 567                 ll_free_sbi(sb);
 568                 lsi->lsi_llsbi = NULL;
 569         }
 570         RETURN(err);
 571 } /* ll_fill_super */
 572
 573
 574 void ll_put_super(struct super_block *sb)
 575 {
 576         struct obd_device *obd;
 577         struct lustre_sb_info *lsi = s2lsi(sb);
 578         struct ll_sb_info *sbi = ll_s2sbi(sb);
 579         char *profilenm = get_profile_name(sb);
 580         int next = 0;
 581         ENTRY;
 582
 583         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
 584         obd = class_exp2obd(sbi->ll_mdc_exp);
 585         if (obd) {
 586                 int next = 0;
 587                 int force = obd->obd_no_recov;
 588                 /* We need to set force before the lov_disconnect in
 589                 lustre_common_put_super, since l_d cleans up osc's as well. */
 590                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next))
 591                        != NULL) {
 592                         obd->obd_force = force;
 593                 }
 594         }
 595
 596         client_common_put_super(sb);
 597
 598         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
 599                 class_manual_cleanup(obd);
 600         }
 601
 602         if (profilenm)
 603                 class_del_profile(profilenm);
 604
 605         ll_free_sbi(sb);
 606         lsi->lsi_llsbi = NULL;
 607
 608         lustre_common_put_super(sb);
 609
 610         EXIT;
 611 } /* client_put_super */
 612
 613 #ifdef HAVE_REGISTER_CACHE
 614 #include <linux/cache_def.h>
 615 #ifdef HAVE_CACHE_RETURN_INT
 616 static int
 617 #else
 618 static void
 619 #endif
 620 ll_shrink_cache(int priority, unsigned int gfp_mask)
 621 {
 622         struct ll_sb_info *sbi;
 623         int count = 0;
 624
 625         list_for_each_entry(sbi, &ll_super_blocks, ll_list)
 626                 count += llap_shrink_cache(sbi, priority);
 627
 628 #ifdef HAVE_CACHE_RETURN_INT
 629         return count;
 630 #endif
 631 }
 632
 633 struct cache_definition ll_cache_definition = {
 634         .name = "llap_cache",
 635         .shrink = ll_shrink_cache
 636 };
 637 #endif /* HAVE_REGISTER_CACHE */
 638
 639 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
 640 {
 641         struct inode *inode = NULL;
 642         l_lock(&lock->l_resource->lr_namespace->ns_lock);
 643         if (lock->l_ast_data) {
 644                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
 645                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
 646                         inode = igrab(lock->l_ast_data);
 647                 } else {
 648                         inode = lock->l_ast_data;
 649                         __LDLM_DEBUG(inode->i_state & I_FREEING ?
 650                                      D_INFO : D_WARNING, lock,
 651                                      "l_ast_data %p is bogus: magic %08x",
 652                                      lock->l_ast_data, lli->lli_inode_magic);
 653                         inode = NULL;
 654                 }
 655         }
 656         l_unlock(&lock->l_resource->lr_namespace->ns_lock);
 657         return inode;
 658 }
 659
 660 static int null_if_equal(struct ldlm_lock *lock, void *data)
 661 {
 662         if (data == lock->l_ast_data) {
 663                 lock->l_ast_data = NULL;
 664
 665                 if (lock->l_req_mode != lock->l_granted_mode)
 666                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
 667         }
 668
 669         return LDLM_ITER_CONTINUE;
 670 }
 671
 672 void ll_clear_inode(struct inode *inode)
 673 {
 674         struct ll_fid fid;
 675         struct ll_inode_info *lli = ll_i2info(inode);
 676         struct ll_sb_info *sbi = ll_i2sbi(inode);
 677         ENTRY;
 678
 679         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
 680                inode->i_generation, inode);
 681
 682         ll_inode2fid(&fid, inode);
 683         clear_bit(LLI_F_HAVE_MDS_SIZE_LOCK, &(ll_i2info(inode)->lli_flags));
 684         mdc_change_cbdata(sbi->ll_mdc_exp, &fid, null_if_equal, inode);
 685
 686         if (lli->lli_smd) {
 687                 obd_change_cbdata(sbi->ll_osc_exp, lli->lli_smd,
 688                                   null_if_equal, inode);
 689
 690                 obd_free_memmd(sbi->ll_osc_exp, &lli->lli_smd);
 691                 lli->lli_smd = NULL;
 692         }
 693
 694         if (lli->lli_symlink_name) {
 695                 OBD_FREE(lli->lli_symlink_name,
 696                          strlen(lli->lli_symlink_name) + 1);
 697                 lli->lli_symlink_name = NULL;
 698         }
 699         lli->lli_inode_magic = LLI_INODE_DEAD;
 700
 701         EXIT;
 702 }
 703
 704 /* If this inode has objects allocated to it (lsm != NULL), then the OST
 705  * object(s) determine the file size and mtime.  Otherwise, the MDS will
 706  * keep these values until such a time that objects are allocated for it.
 707  * We do the MDS operations first, as it is checking permissions for us.
 708  * We don't to the MDS RPC if there is nothing that we want to store there,
 709  * otherwise there is no harm in updating mtime/atime on the MDS if we are
 710  * going to do an RPC anyways.
 711  *
 712  * If we are doing a truncate, we will send the mtime and ctime updates
 713  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
 714  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
 715  * at the same time.
 716  */
 717 int ll_setattr_raw(struct inode *inode, struct iattr *attr)
 718 {
 719         struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
 720         struct ll_sb_info *sbi = ll_i2sbi(inode);
 721         struct ptlrpc_request *request = NULL;
 722         struct mdc_op_data op_data;
 723         int ia_valid = attr->ia_valid;
 724         int rc = 0;
 725         ENTRY;
 726
 727         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
 728                attr->ia_valid);
 729         lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_SETATTR);
 730
 731         if (ia_valid & ATTR_SIZE) {
 732                 if (attr->ia_size > ll_file_maxbytes(inode)) {
 733                         CDEBUG(D_INODE, "file too large %llu > "LPU64"\n",
 734                                attr->ia_size, ll_file_maxbytes(inode));
 735                         RETURN(-EFBIG);
 736                 }
 737
 738                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
 739         }
 740
 741         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
 742         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
 743                 if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
 744                         RETURN(-EPERM);
 745         }
 746
 747         /* We mark all of the fields "set" so MDS/OST does not re-set them */
 748         if (attr->ia_valid & ATTR_CTIME) {
 749                 attr->ia_ctime = CURRENT_TIME;
 750                 attr->ia_valid |= ATTR_CTIME_SET;
 751         }
 752         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
 753                 attr->ia_atime = CURRENT_TIME;
 754                 attr->ia_valid |= ATTR_ATIME_SET;
 755         }
 756         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
 757                 attr->ia_mtime = CURRENT_TIME;
 758                 attr->ia_valid |= ATTR_MTIME_SET;
 759         }
 760
 761         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
 762                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
 763                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
 764                        CURRENT_SECONDS);
 765
 766
 767         /* NB: ATTR_SIZE will only be set after this point if the size
 768          * resides on the MDS, ie, this file has no objects. */
 769         if (lsm)
 770                 attr->ia_valid &= ~ATTR_SIZE;
 771
 772         /* If only OST attributes being set on objects, don't do MDS RPC.
 773          * In that case, we need to check permissions and update the local
 774          * inode ourselves so we can call obdo_from_inode() always. */
 775         if (ia_valid & (lsm ? ~(ATTR_SIZE | ATTR_FROM_OPEN | ATTR_RAW) : ~0)) {
 776                 struct lustre_md md;
 777                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
 778
 779                 rc = mdc_setattr(sbi->ll_mdc_exp, &op_data,
 780                                  attr, NULL, 0, NULL, 0, &request);
 781
 782                 if (rc) {
 783                         ptlrpc_req_finished(request);
 784                         if (rc != -EPERM && rc != -EACCES)
 785                                 CERROR("mdc_setattr fails: rc = %d\n", rc);
 786                         RETURN(rc);
 787                 }
 788
 789                 rc = mdc_req2lustre_md(request, 0, sbi->ll_osc_exp, &md);
 790                 if (rc) {
 791                         ptlrpc_req_finished(request);
 792                         RETURN(rc);
 793                 }
 794
 795                 /* We call inode_setattr to adjust timestamps.
 796                  * If there is at least some data in file, we cleared ATTR_SIZE
 797                  * above to avoid invoking vmtruncate, otherwise it is important
 798                  * to call vmtruncate in inode_setattr to update inode->i_size
 799                  * (bug 6196) */
 800                 inode_setattr(inode, attr);
 801
 802                 ll_update_inode(inode, md.body, md.lsm);
 803                 ptlrpc_req_finished(request);
 804
 805                 if (!lsm || !S_ISREG(inode->i_mode)) {
 806                         CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
 807                         RETURN(0);
 808                 }
 809         } else {
 810                 /* The OST doesn't check permissions, but the alternative is
 811                  * a gratuitous RPC to the MDS.  We already rely on the client
 812                  * to do read/write/truncate permission checks, so is mtime OK?
 813                  */
 814                 if (ia_valid & (ATTR_MTIME | ATTR_ATIME)) {
 815                         /* from sys_utime() */
 816                         if (!(ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))) {
 817                                 if (current->fsuid != inode->i_uid &&
 818                                     (rc=ll_permission(inode,MAY_WRITE,NULL))!=0)
 819                                         RETURN(rc);
 820                         } else {
 821                                 /* from inode_change_ok() */
 822                                 if (current->fsuid != inode->i_uid &&
 823                                     !capable(CAP_FOWNER))
 824                                         RETURN(-EPERM);
 825                         }
 826                 }
 827
 828                 /* Won't invoke vmtruncate, as we already cleared ATTR_SIZE */
 829                 inode_setattr(inode, attr);
 830         }
 831
 832         /* We really need to get our PW lock before we change inode->i_size.
 833          * If we don't we can race with other i_size updaters on our node, like
 834          * ll_file_read.  We can also race with i_size propogation to other
 835          * nodes through dirtying and writeback of final cached pages.  This
 836          * last one is especially bad for racing o_append users on other
 837          * nodes. */
 838         if (ia_valid & ATTR_SIZE) {
 839                 ldlm_policy_data_t policy = { .l_extent = {attr->ia_size,
 840                                                            OBD_OBJECT_EOF } };
 841                 struct lustre_handle lockh = { 0 };
 842                 struct ll_inode_info *lli = ll_i2info(inode);
 843                 int err, ast_flags = 0;
 844                 /* XXX when we fix the AST intents to pass the discard-range
 845                  * XXX extent, make ast_flags always LDLM_AST_DISCARD_DATA
 846                  * XXX here. */
 847                 if (attr->ia_size == 0)
 848                         ast_flags = LDLM_AST_DISCARD_DATA;
 849
 850                 up(&inode->i_sem);
 851                 UP_WRITE_I_ALLOC_SEM(inode);
 852                 rc = ll_extent_lock(NULL, inode, lsm, LCK_PW, &policy, &lockh,
 853                                     ast_flags);
 854 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 855                 DOWN_WRITE_I_ALLOC_SEM(inode);
 856                 down(&inode->i_sem);
 857 #else
 858                 down(&inode->i_sem);
 859                 DOWN_WRITE_I_ALLOC_SEM(inode);
 860 #endif
 861                 if (rc != 0)
 862                         RETURN(rc);
 863
 864                 /* Only ll_inode_size_lock is taken at this level.
 865                  * lov_stripe_lock() is grabbed by ll_truncate() only over
 866                  * call to obd_adjust_kms().  If vmtruncate returns 0, then
 867                  * ll_truncate dropped ll_inode_size_lock() */
 868                 ll_inode_size_lock(inode, 0);
 869                 rc = vmtruncate(inode, attr->ia_size);
 870                 if (rc != 0) {
 871                         LASSERT(atomic_read(&lli->lli_size_sem.count) <= 0);
 872                         ll_inode_size_unlock(inode, 0);
 873                 }
 874
 875                 err = ll_extent_unlock(NULL, inode, lsm, LCK_PW, &lockh);
 876                 if (err) {
 877                         CERROR("ll_extent_unlock failed: %d\n", err);
 878                         if (!rc)
 879                                 rc = err;
 880                 }
 881         } else if (ia_valid & (ATTR_MTIME | ATTR_MTIME_SET)) {
 882                 struct obdo oa;
 883
 884                 CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
 885                        inode->i_ino, LTIME_S(attr->ia_mtime));
 886                 oa.o_id = lsm->lsm_object_id;
 887                 oa.o_valid = OBD_MD_FLID;
 888                 obdo_from_inode(&oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 889                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME);
 890                 rc = obd_setattr(sbi->ll_osc_exp, &oa, lsm, NULL);
 891                 if (rc)
 892                         CERROR("obd_setattr fails: rc=%d\n", rc);
 893         }
 894         RETURN(rc);
 895 }
 896
 897 int ll_setattr(struct dentry *de, struct iattr *attr)
 898 {
 899         LBUG(); /* code is unused, but leave this in case of VFS changes */
 900         RETURN(-ENOSYS);
 901 }
 902
 903 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
 904                        unsigned long max_age)
 905 {
 906         struct ll_sb_info *sbi = ll_s2sbi(sb);
 907         struct obd_statfs obd_osfs;
 908         int rc;
 909         ENTRY;
 910
 911         rc = obd_statfs(class_exp2obd(sbi->ll_mdc_exp), osfs, max_age);
 912         if (rc) {
 913                 CERROR("mdc_statfs fails: rc = %d\n", rc);
 914                 RETURN(rc);
 915         }
 916
 917         osfs->os_type = sb->s_magic;
 918
 919         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
 920                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
 921
 922         rc = obd_statfs(class_exp2obd(sbi->ll_osc_exp), &obd_osfs, max_age);
 923         if (rc) {
 924                 CERROR("obd_statfs fails: rc = %d\n", rc);
 925                 RETURN(rc);
 926         }
 927
 928         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
 929                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
 930                obd_osfs.os_files);
 931
 932         osfs->os_blocks = obd_osfs.os_blocks;
 933         osfs->os_bfree = obd_osfs.os_bfree;
 934         osfs->os_bavail = obd_osfs.os_bavail;
 935
 936         /* If we don't have as many objects free on the OST as inodes
 937          * on the MDS, we reduce the total number of inodes to
 938          * compensate, so that the "inodes in use" number is correct.
 939          */
 940         if (obd_osfs.os_ffree < osfs->os_ffree) {
 941                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
 942                         obd_osfs.os_ffree;
 943                 osfs->os_ffree = obd_osfs.os_ffree;
 944         }
 945
 946         RETURN(rc);
 947 }
 948
 949 int ll_statfs(struct super_block *sb, struct kstatfs *sfs)
 950 {
 951         struct obd_statfs osfs;
 952         int rc;
 953
 954         CDEBUG(D_VFSTRACE, "VFS Op:\n");
 955         lprocfs_counter_incr(ll_s2sbi(sb)->ll_stats, LPROC_LL_STAFS);
 956
 957         /* For now we will always get up-to-date statfs values, but in the
 958          * future we may allow some amount of caching on the client (e.g.
 959          * from QOS or lprocfs updates). */
 960         rc = ll_statfs_internal(sb, &osfs, jiffies - 1);
 961         if (rc)
 962                 return rc;
 963
 964         statfs_unpack(sfs, &osfs);
 965
 966         if (sizeof(sfs->f_blocks) == 4) {
 967                 while (osfs.os_blocks > ~0UL) {
 968                         sfs->f_bsize <<= 1;
 969
 970                         osfs.os_blocks >>= 1;
 971                         osfs.os_bfree >>= 1;
 972                         osfs.os_bavail >>= 1;
 973                 }
 974         }
 975
 976         sfs->f_blocks = osfs.os_blocks;
 977         sfs->f_bfree = osfs.os_bfree;
 978         sfs->f_bavail = osfs.os_bavail;
 979
 980         return 0;
 981 }
 982
 983 void ll_inode_size_lock(struct inode *inode, int lock_lsm)
 984 {
 985         struct ll_inode_info *lli;
 986         struct lov_stripe_md *lsm;
 987
 988         lli = ll_i2info(inode);
 989         LASSERT(lli->lli_size_sem_owner != current);
 990         down(&lli->lli_size_sem);
 991         LASSERT(lli->lli_size_sem_owner == NULL);
 992         lli->lli_size_sem_owner = current;
 993         lsm = lli->lli_smd;
 994         LASSERTF(lsm != NULL || lock_lsm == 0, "lsm %p, lock_lsm %d\n",
 995                  lsm, lock_lsm);
 996         if (lock_lsm)
 997                 lov_stripe_lock(lsm);
 998 }
 999
1000 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm)
1001 {
1002         struct ll_inode_info *lli;
1003         struct lov_stripe_md *lsm;
1004
1005         lli = ll_i2info(inode);
1006         lsm = lli->lli_smd;
1007         LASSERTF(lsm != NULL || unlock_lsm == 0, "lsm %p, lock_lsm %d\n",
1008                  lsm, unlock_lsm);
1009         if (unlock_lsm)
1010                 lov_stripe_unlock(lsm);
1011         LASSERT(lli->lli_size_sem_owner == current);
1012         lli->lli_size_sem_owner = NULL;
1013         up(&lli->lli_size_sem);
1014 }
1015
1016 void ll_update_inode(struct inode *inode, struct mds_body *body,
1017                      struct lov_stripe_md *lsm)
1018 {
1019         struct ll_inode_info *lli = ll_i2info(inode);
1020
1021         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1022         if (lsm != NULL) {
1023                 if (lli->lli_smd == NULL) {
1024                         if (lsm->lsm_magic != LOV_MAGIC) {
1025                                 dump_lsm(D_ERROR, lsm);
1026                                 LBUG();
1027                         }
1028                         CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1029                                lsm, inode->i_ino, inode->i_generation, inode);
1030                         /* ll_inode_size_lock() requires it is only called
1031                          * with lli_smd != NULL or lock_lsm == 0 or we can
1032                          * race between lock/unlock.  bug 9547 */
1033                         lli->lli_smd = lsm;
1034                         lli->lli_maxbytes = lsm->lsm_maxbytes;
1035                         if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
1036                                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
1037                 } else {
1038                         if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
1039                                 CERROR("lsm mismatch for inode %ld\n",
1040                                        inode->i_ino);
1041                                 CERROR("lli_smd:\n");
1042                                 dump_lsm(D_ERROR, lli->lli_smd);
1043                                 CERROR("lsm:\n");
1044                                 dump_lsm(D_ERROR, lsm);
1045                                 LBUG();
1046                         }
1047                 }
1048                 /* bug 2844 - limit i_blksize for broken user-space apps */
1049                 LASSERTF(lsm->lsm_xfersize != 0, "%lu\n", lsm->lsm_xfersize);
1050                 inode->i_blksize = min(lsm->lsm_xfersize, LL_MAX_BLKSIZE);
1051                 if (lli->lli_smd != lsm)
1052                         obd_free_memmd(ll_i2obdexp(inode), &lsm);
1053         } else {
1054                 inode->i_blksize = max(inode->i_blksize,
1055                                        inode->i_sb->s_blocksize);
1056         }
1057
1058         if (body->valid & OBD_MD_FLID)
1059                 inode->i_ino = body->ino;
1060         if (body->valid & OBD_MD_FLATIME)
1061                 LTIME_S(inode->i_atime) = body->atime;
1062         if (body->valid & OBD_MD_FLMTIME &&
1063             body->mtime > LTIME_S(inode->i_mtime)) {
1064                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
1065                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
1066                 LTIME_S(inode->i_mtime) = body->mtime;
1067         }
1068         if (body->valid & OBD_MD_FLCTIME &&
1069             body->ctime > LTIME_S(inode->i_ctime))
1070                 LTIME_S(inode->i_ctime) = body->ctime;
1071         if (body->valid & OBD_MD_FLMODE)
1072                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1073         if (body->valid & OBD_MD_FLTYPE)
1074                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1075         if (body->valid & OBD_MD_FLUID)
1076                 inode->i_uid = body->uid;
1077         if (body->valid & OBD_MD_FLGID)
1078                 inode->i_gid = body->gid;
1079         if (body->valid & OBD_MD_FLFLAGS)
1080                 inode->i_flags = body->flags;
1081         if (body->valid & OBD_MD_FLNLINK)
1082                 inode->i_nlink = body->nlink;
1083         if (body->valid & OBD_MD_FLGENER)
1084                 inode->i_generation = body->generation;
1085         if (body->valid & OBD_MD_FLRDEV)
1086 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1087                 inode->i_rdev = body->rdev;
1088 #else
1089                 inode->i_rdev = old_decode_dev(body->rdev);
1090 #endif
1091         if (body->valid & OBD_MD_FLSIZE)
1092                 inode->i_size = body->size;
1093         if (body->valid & OBD_MD_FLBLOCKS)
1094                 inode->i_blocks = body->blocks;
1095
1096         if (body->valid & OBD_MD_FLSIZE)
1097                 set_bit(LLI_F_HAVE_MDS_SIZE_LOCK, &lli->lli_flags);
1098 }
1099
1100 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
1101 static struct backing_dev_info ll_backing_dev_info = {
1102         .ra_pages       = 0,    /* No readahead */
1103 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12))
1104         .capabilities   = 0,    /* Does contribute to dirty memory */
1105 #else
1106         .memory_backed  = 0,    /* Does contribute to dirty memory */
1107 #endif
1108 };
1109 #endif
1110
1111 void ll_read_inode2(struct inode *inode, void *opaque)
1112 {
1113         struct lustre_md *md = opaque;
1114         struct ll_inode_info *lli = ll_i2info(inode);
1115         ENTRY;
1116
1117         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1118                inode->i_generation, inode);
1119
1120         ll_lli_init(lli);
1121
1122         LASSERT(!lli->lli_smd);
1123
1124         /* Core attributes from the MDS first.  This is a new inode, and
1125          * the VFS doesn't zero times in the core inode so we have to do
1126          * it ourselves.  They will be overwritten by either MDS or OST
1127          * attributes - we just need to make sure they aren't newer. */
1128         LTIME_S(inode->i_mtime) = 0;
1129         LTIME_S(inode->i_atime) = 0;
1130         LTIME_S(inode->i_ctime) = 0;
1131         inode->i_rdev = 0;
1132         ll_update_inode(inode, md->body, md->lsm);
1133
1134         /* OIDEBUG(inode); */
1135
1136         if (S_ISREG(inode->i_mode)) {
1137                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1138                 inode->i_op = &ll_file_inode_operations;
1139                 inode->i_fop = sbi->ll_fop;
1140                 inode->i_mapping->a_ops = &ll_aops;
1141                 EXIT;
1142         } else if (S_ISDIR(inode->i_mode)) {
1143                 inode->i_op = &ll_dir_inode_operations;
1144                 inode->i_fop = &ll_dir_operations;
1145                 inode->i_mapping->a_ops = &ll_dir_aops;
1146                 EXIT;
1147         } else if (S_ISLNK(inode->i_mode)) {
1148                 inode->i_op = &ll_fast_symlink_inode_operations;
1149                 EXIT;
1150         } else {
1151                 inode->i_op = &ll_special_inode_operations;
1152
1153 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1154                 init_special_inode(inode, inode->i_mode,
1155                                    kdev_t_to_nr(inode->i_rdev));
1156
1157                 /* initializing backing dev info. */
1158                 inode->i_mapping->backing_dev_info = &ll_backing_dev_info;
1159 #else
1160                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1161 #endif
1162                 lli->ll_save_ifop = inode->i_fop;
1163
1164                 if (S_ISCHR(inode->i_mode))
1165                         inode->i_fop = &ll_special_chr_inode_fops;
1166                 else if (S_ISBLK(inode->i_mode))
1167                         inode->i_fop = &ll_special_blk_inode_fops;
1168                 else if (S_ISFIFO(inode->i_mode))
1169                         inode->i_fop = &ll_special_fifo_inode_fops;
1170                 else if (S_ISSOCK(inode->i_mode))
1171                         inode->i_fop = &ll_special_sock_inode_fops;
1172                 EXIT;
1173         }
1174 }
1175
1176 int ll_iocontrol(struct inode *inode, struct file *file,
1177                  unsigned int cmd, unsigned long arg)
1178 {
1179         struct ll_sb_info *sbi = ll_i2sbi(inode);
1180         struct ptlrpc_request *req = NULL;
1181         int rc, flags = 0;
1182         ENTRY;
1183
1184         switch(cmd) {
1185         case EXT3_IOC_GETFLAGS: {
1186                 struct ll_fid fid;
1187                 struct mds_body *body;
1188
1189                 ll_inode2fid(&fid, inode);
1190                 rc = mdc_getattr(sbi->ll_mdc_exp, &fid, OBD_MD_FLFLAGS,0,&req);
1191                 if (rc) {
1192                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1193                         RETURN(-abs(rc));
1194                 }
1195
1196                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*body));
1197
1198                 if (body->flags & S_APPEND)
1199                         flags |= EXT3_APPEND_FL;
1200                 if (body->flags & S_IMMUTABLE)
1201                         flags |= EXT3_IMMUTABLE_FL;
1202                 if (body->flags & S_NOATIME)
1203                         flags |= EXT3_NOATIME_FL;
1204
1205                 ptlrpc_req_finished (req);
1206
1207                 RETURN(put_user(flags, (int *)arg));
1208         }
1209         case EXT3_IOC_SETFLAGS: {
1210                 struct mdc_op_data op_data;
1211                 struct iattr attr;
1212                 struct obdo *oa;
1213                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1214
1215                 if (get_user(flags, (int *)arg))
1216                         RETURN(-EFAULT);
1217
1218                 oa = obdo_alloc();
1219                 if (!oa)
1220                         RETURN(-ENOMEM);
1221
1222                 ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
1223
1224                 memset(&attr, 0x0, sizeof(attr));
1225                 attr.ia_attr_flags = flags;
1226                 attr.ia_valid |= ATTR_ATTR_FLAG;
1227
1228                 rc = mdc_setattr(sbi->ll_mdc_exp, &op_data,
1229                                  &attr, NULL, 0, NULL, 0, &req);
1230                 if (rc) {
1231                         ptlrpc_req_finished(req);
1232                         if (rc != -EPERM && rc != -EACCES)
1233                                 CERROR("mdc_setattr fails: rc = %d\n", rc);
1234                         obdo_free(oa);
1235                         RETURN(rc);
1236                 }
1237                 ptlrpc_req_finished(req);
1238
1239                 oa->o_id = lsm->lsm_object_id;
1240                 oa->o_flags = flags;
1241                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS;
1242
1243                 rc = obd_setattr(sbi->ll_osc_exp, oa, lsm, NULL);
1244                 obdo_free(oa);
1245                 if (rc) {
1246                         if (rc != -EPERM && rc != -EACCES)
1247                                 CERROR("mdc_setattr fails: rc = %d\n", rc);
1248                         RETURN(rc);
1249                 }
1250
1251                 if (flags & EXT3_APPEND_FL)
1252                         inode->i_flags |= S_APPEND;
1253                 else
1254                         inode->i_flags &= ~S_APPEND;
1255                 if (flags & EXT3_IMMUTABLE_FL)
1256                         inode->i_flags |= S_IMMUTABLE;
1257                 else
1258                         inode->i_flags &= ~S_IMMUTABLE;
1259                 if (flags & EXT3_NOATIME_FL)
1260                         inode->i_flags |= S_NOATIME;
1261                 else
1262                         inode->i_flags &= ~S_NOATIME;
1263
1264                 RETURN(0);
1265         }
1266         default:
1267                 RETURN(-ENOSYS);
1268         }
1269
1270         RETURN(0);
1271 }
1272
1273 void ll_umount_begin(struct super_block *sb)
1274 {
1275         struct ll_sb_info *sbi = ll_s2sbi(sb);
1276         struct obd_device *obd;
1277         struct obd_ioctl_data ioc_data = { 0 };
1278         ENTRY;
1279         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1280                sb->s_count, atomic_read(&sb->s_active));
1281
1282         obd = class_exp2obd(sbi->ll_mdc_exp);
1283         if (obd == NULL) {
1284                 CERROR("Invalid MDC connection handle "LPX64"\n",
1285                        sbi->ll_mdc_exp->exp_handle.h_cookie);
1286                 EXIT;
1287                 return;
1288         }
1289         obd->obd_no_recov = 1;
1290         obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_mdc_exp, sizeof ioc_data,
1291                       &ioc_data, NULL);
1292
1293         obd = class_exp2obd(sbi->ll_osc_exp);
1294         if (obd == NULL) {
1295                 CERROR("Invalid LOV connection handle "LPX64"\n",
1296                        sbi->ll_osc_exp->exp_handle.h_cookie);
1297                 EXIT;
1298                 return;
1299         }
1300
1301         obd->obd_no_recov = 1;
1302         obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_osc_exp, sizeof ioc_data,
1303                       &ioc_data, NULL);
1304
1305         /* Really, we'd like to wait until there are no requests outstanding,
1306          * and then continue.  For now, we just invalidate the requests,
1307          * schedule, and hope.
1308          */
1309         schedule();
1310
1311         EXIT;
1312 }
1313
1314 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
1315 {
1316         struct ll_sb_info *sbi = ll_s2sbi(sb);
1317         int err;
1318         __u32 read_only;
1319
1320         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
1321                 read_only = *flags & MS_RDONLY;
1322                 err = obd_set_info(sbi->ll_mdc_exp, strlen("read-only"),
1323                                    "read-only", sizeof(read_only), &read_only);
1324                 if (err) {
1325                         CERROR("Failed to change the read-only flag during "
1326                                "remount: %d\n", err);
1327                         return err;
1328                 }
1329
1330                 if (read_only)
1331                         sb->s_flags |= MS_RDONLY;
1332                 else
1333                         sb->s_flags &= ~MS_RDONLY;
1334         }
1335         return 0;
1336 }
1337
1338 int ll_prep_inode(struct obd_export *exp, struct inode **inode,
1339                   struct ptlrpc_request *req, int offset,struct super_block *sb)
1340 {
1341         struct lustre_md md;
1342         int rc = 0;
1343
1344         rc = mdc_req2lustre_md(req, offset, exp, &md);
1345         if (rc)
1346                 RETURN(rc);
1347
1348         if (*inode) {
1349                 ll_update_inode(*inode, md.body, md.lsm);
1350         } else {
1351                 LASSERT(sb);
1352                 *inode = ll_iget(sb, md.body->ino, &md);
1353                 if (*inode == NULL || is_bad_inode(*inode)) {
1354                         /* free the lsm if we allocated one above */
1355                         if (md.lsm != NULL)
1356                                 obd_free_memmd(exp, &md.lsm);
1357                         rc = -ENOMEM;
1358                         CERROR("new_inode -fatal: rc %d\n", rc);
1359                 }
1360         }
1361
1362         RETURN(rc);
1363 }
1364
1365 char *llap_origins[] = {
1366         [LLAP_ORIGIN_UNKNOWN] = "--",
1367         [LLAP_ORIGIN_READPAGE] = "rp",
1368         [LLAP_ORIGIN_READAHEAD] = "ra",
1369         [LLAP_ORIGIN_COMMIT_WRITE] = "cw",
1370         [LLAP_ORIGIN_WRITEPAGE] = "wp",
1371 };
1372
1373 struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
1374                                              struct list_head *list)
1375 {
1376         struct ll_async_page *llap;
1377         struct list_head *pos;
1378
1379         list_for_each(pos, list) {
1380                 if (pos == &sbi->ll_pglist)
1381                         return NULL;
1382                 llap = list_entry(pos, struct ll_async_page, llap_pglist_item);
1383                 if (llap->llap_page == NULL)
1384                         continue;
1385                 return llap;
1386         }
1387         LBUG();
1388         return NULL;
1389 }
1390
1391 EXPORT_SYMBOL(ll_fill_super);
1392 EXPORT_SYMBOL(ll_put_super);
1393 EXPORT_SYMBOL(ll_remount_fs);
1394 EXPORT_SYMBOL(ll_umount_begin);
1395