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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see [sun.com URL with a
  20  * copy of GPLv2].
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/random.h>
  46 #include <linux/version.h>
  47 #include <linux/mm.h>
  48
  49 #include <lustre_lite.h>
  50 #include <lustre_ha.h>
  51 #include <lustre_dlm.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_disk.h>
  54 #include <lustre_param.h>
  55 #include <lustre_log.h>
  56 #include <obd_cksum.h>
  57 #include <lustre_cache.h>
  58 #include "llite_internal.h"
  59
  60 cfs_mem_cache_t *ll_file_data_slab;
  61
  62 LIST_HEAD(ll_super_blocks);
  63 spinlock_t ll_sb_lock = SPIN_LOCK_UNLOCKED;
  64
  65 extern struct address_space_operations ll_aops;
  66 extern struct address_space_operations ll_dir_aops;
  67
  68 #ifndef log2
  69 #define log2(n) ffz(~(n))
  70 #endif
  71
  72
  73 static struct ll_sb_info *ll_init_sbi(void)
  74 {
  75         struct ll_sb_info *sbi = NULL;
  76         unsigned long pages;
  77         struct sysinfo si;
  78         class_uuid_t uuid;
  79         int i;
  80         ENTRY;
  81
  82         OBD_ALLOC(sbi, sizeof(*sbi));
  83         if (!sbi)
  84                 RETURN(NULL);
  85
  86         spin_lock_init(&sbi->ll_lock);
  87         spin_lock_init(&sbi->ll_lco.lco_lock);
  88         spin_lock_init(&sbi->ll_pp_extent_lock);
  89         spin_lock_init(&sbi->ll_process_lock);
  90         sbi->ll_rw_stats_on = 0;
  91         INIT_LIST_HEAD(&sbi->ll_pglist);
  92
  93         si_meminfo(&si);
  94         pages = si.totalram - si.totalhigh;
  95         if (pages >> (20 - CFS_PAGE_SHIFT) < 512)
  96                 sbi->ll_async_page_max = pages / 2;
  97         else
  98                 sbi->ll_async_page_max = (pages / 4) * 3;
  99         sbi->ll_ra_info.ra_max_pages = min(num_physpages / 8,
 100                                            SBI_DEFAULT_READAHEAD_MAX);
 101         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 102                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 103         sbi->ll_contention_time = SBI_DEFAULT_CONTENTION_SECONDS;
 104         sbi->ll_lockless_truncate_enable = SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE;
 105         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 106         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 107
 108         ll_generate_random_uuid(uuid);
 109         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 110         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 111
 112         spin_lock(&ll_sb_lock);
 113         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 114         spin_unlock(&ll_sb_lock);
 115
 116 #ifdef ENABLE_LLITE_CHECKSUM
 117         sbi->ll_flags |= LL_SBI_CHECKSUM;
 118 #endif
 119
 120 #ifdef HAVE_LRU_RESIZE_SUPPORT
 121         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 122 #endif
 123
 124 #ifdef HAVE_EXPORT___IGET
 125         INIT_LIST_HEAD(&sbi->ll_deathrow);
 126         spin_lock_init(&sbi->ll_deathrow_lock);
 127 #endif
 128         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 129                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].pp_r_hist.oh_lock);
 130                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].pp_w_hist.oh_lock);
 131         }
 132
 133         /* metadata statahead is enabled by default */
 134         sbi->ll_sa_max = LL_SA_RPC_DEF;
 135
 136         RETURN(sbi);
 137 }
 138
 139 void ll_free_sbi(struct super_block *sb)
 140 {
 141         struct ll_sb_info *sbi = ll_s2sbi(sb);
 142         ENTRY;
 143
 144         if (sbi != NULL) {
 145                 spin_lock(&ll_sb_lock);
 146                 list_del(&sbi->ll_list);
 147                 spin_unlock(&ll_sb_lock);
 148                 OBD_FREE(sbi, sizeof(*sbi));
 149         }
 150         EXIT;
 151 }
 152
 153 static struct dentry_operations ll_d_root_ops = {
 154 #ifdef DCACHE_LUSTRE_INVALID
 155         .d_compare = ll_dcompare,
 156 #endif
 157 };
 158
 159 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
 160  * us to make MDS RPCs with large enough reply buffers to hold the
 161  * maximum-sized (= maximum striped) EA and cookie without having to
 162  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
 163 static int ll_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp)
 164 {
 165         struct lov_stripe_md lsm = { .lsm_magic = LOV_MAGIC };
 166         __u32 valsize = sizeof(struct lov_desc);
 167         int rc, easize, def_easize, cookiesize;
 168         struct lov_desc desc;
 169         __u32 stripes;
 170         ENTRY;
 171
 172         rc = obd_get_info(dt_exp, sizeof(KEY_LOVDESC), KEY_LOVDESC,
 173                           &valsize, &desc);
 174         if (rc)
 175                 RETURN(rc);
 176
 177         stripes = min(desc.ld_tgt_count, (__u32)LOV_MAX_STRIPE_COUNT);
 178         lsm.lsm_stripe_count = stripes;
 179         easize = obd_size_diskmd(dt_exp, &lsm);
 180
 181         lsm.lsm_stripe_count = desc.ld_default_stripe_count;
 182         def_easize = obd_size_diskmd(dt_exp, &lsm);
 183
 184         cookiesize = stripes * sizeof(struct llog_cookie);
 185
 186         CDEBUG(D_HA, "updating max_mdsize/max_cookiesize: %d/%d\n",
 187                easize, cookiesize);
 188
 189         rc = md_init_ea_size(md_exp, easize, def_easize, cookiesize);
 190         RETURN(rc);
 191 }
 192
 193 static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 194 {
 195         struct inode *root = 0;
 196         struct ll_sb_info *sbi = ll_s2sbi(sb);
 197         struct obd_device *obd;
 198         struct lu_fid rootfid;
 199         struct obd_capa *oc = NULL;
 200         struct obd_statfs osfs;
 201         struct ptlrpc_request *request = NULL;
 202         struct lustre_handle dt_conn = {0, };
 203         struct lustre_handle md_conn = {0, };
 204         struct obd_connect_data *data = NULL;
 205         struct lustre_md lmd;
 206         obd_valid valid;
 207         int size, err, checksum;
 208         ENTRY;
 209
 210         obd = class_name2obd(md);
 211         if (!obd) {
 212                 CERROR("MD %s: not setup or attached\n", md);
 213                 RETURN(-EINVAL);
 214         }
 215
 216         OBD_ALLOC_PTR(data);
 217         if (data == NULL)
 218                 RETURN(-ENOMEM);
 219
 220         if (proc_lustre_fs_root) {
 221                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 222                                                   dt, md);
 223                 if (err < 0)
 224                         CERROR("could not register mount in /proc/fs/lustre\n");
 225         }
 226
 227         /* indicate the features supported by this client */
 228         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 229                                   OBD_CONNECT_JOIN     | OBD_CONNECT_ATTRFID  |
 230                                   OBD_CONNECT_VERSION  | OBD_CONNECT_MDS_CAPA |
 231                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_CANCELSET|
 232                                   OBD_CONNECT_FID      | OBD_CONNECT_AT;
 233
 234 #ifdef HAVE_LRU_RESIZE_SUPPORT
 235         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 236                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 237 #endif
 238 #ifdef CONFIG_FS_POSIX_ACL
 239         data->ocd_connect_flags |= OBD_CONNECT_ACL;
 240 #endif
 241         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 242         data->ocd_version = LUSTRE_VERSION_CODE;
 243
 244         if (sb->s_flags & MS_RDONLY)
 245                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 246         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 247                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 248
 249 #ifdef HAVE_MS_FLOCK_LOCK
 250         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 251         sb->s_flags |= MS_FLOCK_LOCK;
 252 #endif
 253
 254         if (sbi->ll_flags & LL_SBI_FLOCK)
 255                 sbi->ll_fop = &ll_file_operations_flock;
 256         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 257                 sbi->ll_fop = &ll_file_operations;
 258         else
 259                 sbi->ll_fop = &ll_file_operations_noflock;
 260
 261         /* real client */
 262         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 263         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 264                 data->ocd_connect_flags &= ~OBD_CONNECT_LCL_CLIENT;
 265                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT;
 266         } else {
 267                 data->ocd_connect_flags &= ~OBD_CONNECT_RMT_CLIENT;
 268                 data->ocd_connect_flags |= OBD_CONNECT_LCL_CLIENT;
 269         }
 270
 271         err = obd_connect(NULL, &md_conn, obd, &sbi->ll_sb_uuid, data, NULL);
 272         if (err == -EBUSY) {
 273                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 274                                    "recovery, of which this client is not a "
 275                                    "part. Please wait for recovery to complete,"
 276                                    " abort, or time out.\n", md);
 277                 GOTO(out, err);
 278         } else if (err) {
 279                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 280                 GOTO(out, err);
 281         }
 282         sbi->ll_md_exp = class_conn2export(&md_conn);
 283
 284         err = obd_fid_init(sbi->ll_md_exp);
 285         if (err) {
 286                 CERROR("Can't init metadata layer FID infrastructure, "
 287                        "rc %d\n", err);
 288                 GOTO(out_md, err);
 289         }
 290
 291         err = obd_statfs(obd, &osfs, cfs_time_current_64() - HZ, 0);
 292         if (err)
 293                 GOTO(out_md_fid, err);
 294
 295         size = sizeof(*data);
 296         err = obd_get_info(sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 297                            KEY_CONN_DATA,  &size, data);
 298         if (err) {
 299                 CERROR("Get connect data failed: %d \n", err);
 300                 GOTO(out_md, err);
 301         }
 302
 303         LASSERT(osfs.os_bsize);
 304         sb->s_blocksize = osfs.os_bsize;
 305         sb->s_blocksize_bits = log2(osfs.os_bsize);
 306         sb->s_magic = LL_SUPER_MAGIC;
 307
 308         /* for bug 11559. in $LINUX/fs/read_write.c, function do_sendfile():
 309          *         retval = in_file->f_op->sendfile(...);
 310          *         if (*ppos > max)
 311          *                 retval = -EOVERFLOW;
 312          *
 313          * it will check if *ppos is greater than max. However, max equals to
 314          * s_maxbytes, which is a negative integer in a x86_64 box since loff_t
 315          * has been defined as a signed long long ineger in linux kernel. */
 316 #if BITS_PER_LONG == 64
 317         sb->s_maxbytes = PAGE_CACHE_MAXBYTES >> 1;
 318 #else
 319         sb->s_maxbytes = PAGE_CACHE_MAXBYTES;
 320 #endif
 321         sbi->ll_namelen = osfs.os_namelen;
 322         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 323
 324         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 325             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 326                 LCONSOLE_INFO("Disabling user_xattr feature because "
 327                               "it is not supported on the server\n");
 328                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 329         }
 330
 331         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 332 #ifdef MS_POSIXACL
 333                 sb->s_flags |= MS_POSIXACL;
 334 #endif
 335                 sbi->ll_flags |= LL_SBI_ACL;
 336         } else {
 337                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 338 #ifdef MS_POSIXACL
 339                 sb->s_flags &= ~MS_POSIXACL;
 340 #endif
 341                 sbi->ll_flags &= ~LL_SBI_ACL;
 342         }
 343
 344         if (data->ocd_connect_flags & OBD_CONNECT_JOIN)
 345                 sbi->ll_flags |= LL_SBI_JOIN;
 346
 347         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 348                 if (!(data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT)) {
 349                         /* sometimes local client claims to be remote, but mdt
 350                          * will disagree when client gss not applied. */
 351                         LCONSOLE_INFO("client claims to be remote, but server "
 352                                       "rejected, forced to be local.\n");
 353                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 354                 }
 355         } else {
 356                 if (!(data->ocd_connect_flags & OBD_CONNECT_LCL_CLIENT)) {
 357                         /* with gss applied, remote client can not claim to be
 358                          * local, so mdt maybe force client to be remote. */
 359                         LCONSOLE_INFO("client claims to be local, but server "
 360                                       "rejected, forced to be remote.\n");
 361                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 362                 }
 363         }
 364
 365         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 366                 LCONSOLE_INFO("client enabled MDS capability!\n");
 367                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 368         }
 369
 370         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 371                 LCONSOLE_INFO("client enabled OSS capability!\n");
 372                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 373         }
 374
 375         sbi->ll_sdev_orig = sb->s_dev;
 376 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
 377         /* We set sb->s_dev equal on all lustre clients in order to support
 378          * NFS export clustering.  NFSD requires that the FSID be the same
 379          * on all clients. */
 380         /* s_dev is also used in lt_compare() to compare two fs, but that is
 381          * only a node-local comparison. */
 382
 383         /* XXX: this will not work with LMV */
 384         sb->s_dev = get_uuid2int(sbi2mdc(sbi)->cl_target_uuid.uuid,
 385                                  strlen(sbi2mdc(sbi)->cl_target_uuid.uuid));
 386 #endif
 387
 388         obd = class_name2obd(dt);
 389         if (!obd) {
 390                 CERROR("DT %s: not setup or attached\n", dt);
 391                 GOTO(out_md_fid, err = -ENODEV);
 392         }
 393
 394         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 395                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 396                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 397                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 398                                   OBD_CONNECT_AT;
 399         if (sbi->ll_flags & LL_SBI_OSS_CAPA)
 400                 data->ocd_connect_flags |= OBD_CONNECT_OSS_CAPA;
 401
 402         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 403                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 404                  * disabled by default, because it can still be enabled on the
 405                  * fly via /proc. As a consequence, we still need to come to an
 406                  * agreement on the supported algorithms at connect time */
 407                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 408
 409                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 410                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 411                 else
 412                         /* send the list of supported checksum types */
 413                         data->ocd_cksum_types = OBD_CKSUM_ALL;
 414         }
 415
 416 #ifdef HAVE_LRU_RESIZE_SUPPORT
 417         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 418 #endif
 419         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 420                "ocd_grant: %d\n", data->ocd_connect_flags,
 421                data->ocd_version, data->ocd_grant);
 422
 423         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 424         obd->obd_upcall.onu_upcall = ll_ocd_update;
 425         data->ocd_brw_size = PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT;
 426
 427         err = obd_connect(NULL, &dt_conn, obd, &sbi->ll_sb_uuid, data, NULL);
 428         if (err == -EBUSY) {
 429                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 430                                    "recovery, of which this client is not a "
 431                                    "part.  Please wait for recovery to "
 432                                    "complete, abort, or time out.\n", dt);
 433                 GOTO(out_md_fid, err);
 434         } else if (err) {
 435                 CERROR("Cannot connect to %s: rc = %d\n", dt, err);
 436                 GOTO(out_md_fid, err);
 437         }
 438
 439         sbi->ll_dt_exp = class_conn2export(&dt_conn);
 440
 441         err = obd_fid_init(sbi->ll_dt_exp);
 442         if (err) {
 443                 CERROR("Can't init data layer FID infrastructure, "
 444                        "rc %d\n", err);
 445                 GOTO(out_dt, err);
 446         }
 447
 448         spin_lock(&sbi->ll_lco.lco_lock);
 449         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 450         spin_unlock(&sbi->ll_lco.lco_lock);
 451
 452         err = obd_register_page_removal_cb(sbi->ll_dt_exp,
 453                                            ll_page_removal_cb,
 454                                            ll_pin_extent_cb);
 455         if (err) {
 456                 CERROR("cannot register page removal callback: rc = %d\n",err);
 457                 GOTO(out_dt, err);
 458         }
 459         err = obd_register_lock_cancel_cb(sbi->ll_dt_exp,
 460                                           ll_extent_lock_cancel_cb);
 461         if (err) {
 462                 CERROR("cannot register lock cancel callback: rc = %d\n", err);
 463                 GOTO(out_page_rm_cb, err);
 464         }
 465
 466         err = ll_init_ea_size(sbi->ll_md_exp, sbi->ll_dt_exp);;
 467         if (err) {
 468                 CERROR("cannot set max EA and cookie sizes: rc = %d\n", err);
 469                 GOTO(out_lock_cn_cb, err);
 470         }
 471
 472         err = obd_prep_async_page(sbi->ll_dt_exp, NULL, NULL, NULL,
 473                                   0, NULL, NULL, NULL, 0, NULL);
 474         if (err < 0) {
 475                 LCONSOLE_ERROR_MSG(0x151, "There are no OST's in this "
 476                                    "filesystem. There must be at least one "
 477                                    "active OST for a client to start.\n");
 478                 GOTO(out_lock_cn_cb, err);
 479         }
 480
 481         if (!ll_async_page_slab) {
 482                 ll_async_page_slab_size =
 483                         size_round(sizeof(struct ll_async_page)) + err;
 484                 ll_async_page_slab = cfs_mem_cache_create("ll_async_page",
 485                                                           ll_async_page_slab_size,
 486                                                           0, 0);
 487                 if (!ll_async_page_slab)
 488                         GOTO(out_lock_cn_cb, err = -ENOMEM);
 489         }
 490
 491         err = md_getstatus(sbi->ll_md_exp, &rootfid, &oc);
 492         if (err) {
 493                 CERROR("cannot mds_connect: rc = %d\n", err);
 494                 GOTO(out_lock_cn_cb, err);
 495         }
 496         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&rootfid));
 497         sbi->ll_root_fid = rootfid;
 498
 499         sb->s_op = &lustre_super_operations;
 500         sb->s_export_op = &lustre_export_operations;
 501
 502         /* make root inode
 503          * XXX: move this to after cbd setup? */
 504         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 505         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 506                 valid |= OBD_MD_FLRMTPERM;
 507         else if (sbi->ll_flags & LL_SBI_ACL)
 508                 valid |= OBD_MD_FLACL;
 509
 510         err = md_getattr(sbi->ll_md_exp, &rootfid, oc, valid, 0, &request);
 511         if (oc)
 512                 free_capa(oc);
 513         if (err) {
 514                 CERROR("md_getattr failed for root: rc = %d\n", err);
 515                 GOTO(out_lock_cn_cb, err);
 516         }
 517         memset(&lmd, 0, sizeof(lmd));
 518         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 519                                sbi->ll_md_exp, &lmd);
 520         if (err) {
 521                 CERROR("failed to understand root inode md: rc = %d\n", err);
 522                 ptlrpc_req_finished (request);
 523                 GOTO(out_lock_cn_cb, err);
 524         }
 525
 526         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 527         root = ll_iget(sb, ll_fid_build_ino(sbi, &sbi->ll_root_fid), &lmd);
 528         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 529         ptlrpc_req_finished(request);
 530
 531         if (root == NULL || is_bad_inode(root)) {
 532                 if (lmd.lsm)
 533                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 534 #ifdef CONFIG_FS_POSIX_ACL
 535                 if (lmd.posix_acl) {
 536                         posix_acl_release(lmd.posix_acl);
 537                         lmd.posix_acl = NULL;
 538                 }
 539 #endif
 540                 CERROR("lustre_lite: bad iget4 for root\n");
 541                 GOTO(out_root, err = -EBADF);
 542         }
 543
 544         err = ll_close_thread_start(&sbi->ll_lcq);
 545         if (err) {
 546                 CERROR("cannot start close thread: rc %d\n", err);
 547                 GOTO(out_root, err);
 548         }
 549
 550 #ifdef CONFIG_FS_POSIX_ACL
 551         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 552                 rct_init(&sbi->ll_rct);
 553                 et_init(&sbi->ll_et);
 554         }
 555 #endif
 556
 557         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 558         err = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 559                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 560                                  NULL);
 561
 562         sb->s_root = d_alloc_root(root);
 563         if (data != NULL)
 564                 OBD_FREE(data, sizeof(*data));
 565         sb->s_root->d_op = &ll_d_root_ops;
 566         RETURN(err);
 567 out_root:
 568         if (root)
 569                 iput(root);
 570 out_lock_cn_cb:
 571         obd_unregister_lock_cancel_cb(sbi->ll_dt_exp,
 572                                       ll_extent_lock_cancel_cb);
 573 out_page_rm_cb:
 574         obd_unregister_page_removal_cb(sbi->ll_dt_exp,
 575                                        ll_page_removal_cb);
 576         obd_fid_fini(sbi->ll_dt_exp);
 577 out_dt:
 578         obd_disconnect(sbi->ll_dt_exp);
 579         sbi->ll_dt_exp = NULL;
 580 out_md_fid:
 581         obd_fid_fini(sbi->ll_md_exp);
 582 out_md:
 583         obd_disconnect(sbi->ll_md_exp);
 584         sbi->ll_md_exp = NULL;
 585 out:
 586         if (data != NULL)
 587                 OBD_FREE_PTR(data);
 588         lprocfs_unregister_mountpoint(sbi);
 589         return err;
 590 }
 591
 592 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 593 {
 594         int size, rc;
 595
 596         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 597         size = sizeof(int);
 598         rc = obd_get_info(sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 599                           KEY_MAX_EASIZE, &size, lmmsize);
 600         if (rc)
 601                 CERROR("Get max mdsize error rc %d \n", rc);
 602
 603         RETURN(rc);
 604 }
 605
 606 void ll_dump_inode(struct inode *inode)
 607 {
 608         struct list_head *tmp;
 609         int dentry_count = 0;
 610
 611         LASSERT(inode != NULL);
 612
 613         list_for_each(tmp, &inode->i_dentry)
 614                 dentry_count++;
 615
 616         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 617                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 618                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 619 }
 620
 621 void lustre_dump_dentry(struct dentry *dentry, int recur)
 622 {
 623         struct list_head *tmp;
 624         int subdirs = 0;
 625
 626         LASSERT(dentry != NULL);
 627
 628         list_for_each(tmp, &dentry->d_subdirs)
 629                 subdirs++;
 630
 631         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 632                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 633                dentry->d_name.len, dentry->d_name.name,
 634                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 635                dentry->d_parent, dentry->d_inode, atomic_read(&dentry->d_count),
 636                dentry->d_flags, dentry->d_fsdata, subdirs);
 637         if (dentry->d_inode != NULL)
 638                 ll_dump_inode(dentry->d_inode);
 639
 640         if (recur == 0)
 641                 return;
 642
 643         list_for_each(tmp, &dentry->d_subdirs) {
 644                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
 645                 lustre_dump_dentry(d, recur - 1);
 646         }
 647 }
 648
 649 #ifdef HAVE_EXPORT___IGET
 650 static void prune_dir_dentries(struct inode *inode)
 651 {
 652         struct dentry *dentry, *prev = NULL;
 653
 654         /* due to lustre specific logic, a directory
 655          * can have few dentries - a bug from VFS POV */
 656 restart:
 657         spin_lock(&dcache_lock);
 658         if (!list_empty(&inode->i_dentry)) {
 659                 dentry = list_entry(inode->i_dentry.prev,
 660                                     struct dentry, d_alias);
 661                 /* in order to prevent infinite loops we
 662                  * break if previous dentry is busy */
 663                 if (dentry != prev) {
 664                         prev = dentry;
 665                         dget_locked(dentry);
 666                         spin_unlock(&dcache_lock);
 667
 668                         /* try to kill all child dentries */
 669                         lock_dentry(dentry);
 670                         shrink_dcache_parent(dentry);
 671                         unlock_dentry(dentry);
 672                         dput(dentry);
 673
 674                         /* now try to get rid of current dentry */
 675                         d_prune_aliases(inode);
 676                         goto restart;
 677                 }
 678         }
 679         spin_unlock(&dcache_lock);
 680 }
 681
 682 static void prune_deathrow_one(struct ll_inode_info *lli)
 683 {
 684         struct inode *inode = ll_info2i(lli);
 685
 686         /* first, try to drop any dentries - they hold a ref on the inode */
 687         if (S_ISDIR(inode->i_mode))
 688                 prune_dir_dentries(inode);
 689         else
 690                 d_prune_aliases(inode);
 691
 692
 693         /* if somebody still uses it, leave it */
 694         LASSERT(atomic_read(&inode->i_count) > 0);
 695         if (atomic_read(&inode->i_count) > 1)
 696                 goto out;
 697
 698         CDEBUG(D_INODE, "inode %lu/%u(%d) looks a good candidate for prune\n",
 699                inode->i_ino,inode->i_generation, atomic_read(&inode->i_count));
 700
 701         /* seems nobody uses it anymore */
 702         inode->i_nlink = 0;
 703
 704 out:
 705         iput(inode);
 706         return;
 707 }
 708
 709 static void prune_deathrow(struct ll_sb_info *sbi, int try)
 710 {
 711         struct ll_inode_info *lli;
 712         int empty;
 713
 714         do {
 715                 if (need_resched() && try)
 716                         break;
 717
 718                 if (try) {
 719                         if (!spin_trylock(&sbi->ll_deathrow_lock))
 720                                 break;
 721                 } else {
 722                         spin_lock(&sbi->ll_deathrow_lock);
 723                 }
 724
 725                 empty = 1;
 726                 lli = NULL;
 727                 if (!list_empty(&sbi->ll_deathrow)) {
 728                         lli = list_entry(sbi->ll_deathrow.next,
 729                                          struct ll_inode_info,
 730                                          lli_dead_list);
 731                         list_del_init(&lli->lli_dead_list);
 732                         if (!list_empty(&sbi->ll_deathrow))
 733                                 empty = 0;
 734                 }
 735                 spin_unlock(&sbi->ll_deathrow_lock);
 736
 737                 if (lli)
 738                         prune_deathrow_one(lli);
 739
 740         } while (empty == 0);
 741 }
 742 #else /* !HAVE_EXPORT___IGET */
 743 #define prune_deathrow(sbi, try) do {} while (0)
 744 #endif /* HAVE_EXPORT___IGET */
 745
 746 void client_common_put_super(struct super_block *sb)
 747 {
 748         struct ll_sb_info *sbi = ll_s2sbi(sb);
 749         ENTRY;
 750
 751 #ifdef CONFIG_FS_POSIX_ACL
 752         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 753                 et_fini(&sbi->ll_et);
 754                 rct_fini(&sbi->ll_rct);
 755         }
 756 #endif
 757
 758         obd_cancel_unused(sbi->ll_dt_exp, NULL, 0, NULL);
 759
 760         ll_close_thread_shutdown(sbi->ll_lcq);
 761
 762         /* destroy inodes in deathrow */
 763         prune_deathrow(sbi, 0);
 764
 765         list_del(&sbi->ll_conn_chain);
 766
 767         obd_fid_fini(sbi->ll_dt_exp);
 768         obd_disconnect(sbi->ll_dt_exp);
 769         sbi->ll_dt_exp = NULL;
 770
 771         lprocfs_unregister_mountpoint(sbi);
 772
 773         obd_fid_fini(sbi->ll_md_exp);
 774         obd_disconnect(sbi->ll_md_exp);
 775         sbi->ll_md_exp = NULL;
 776
 777         EXIT;
 778 }
 779
 780 void ll_kill_super(struct super_block *sb)
 781 {
 782         struct ll_sb_info *sbi;
 783
 784         ENTRY;
 785
 786         /* not init sb ?*/
 787         if (!(sb->s_flags & MS_ACTIVE))
 788                 return;
 789
 790         sbi = ll_s2sbi(sb);
 791         /* we need restore s_dev from changed for clustred NFS before put_super
 792          * because new kernels have cached s_dev and change sb->s_dev in
 793          * put_super not affected real removing devices */
 794         if (sbi)
 795                 sb->s_dev = sbi->ll_sdev_orig;
 796         EXIT;
 797 }
 798
 799 char *ll_read_opt(const char *opt, char *data)
 800 {
 801         char *value;
 802         char *retval;
 803         ENTRY;
 804
 805         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 806         if (strncmp(opt, data, strlen(opt)))
 807                 RETURN(NULL);
 808         if ((value = strchr(data, '=')) == NULL)
 809                 RETURN(NULL);
 810
 811         value++;
 812         OBD_ALLOC(retval, strlen(value) + 1);
 813         if (!retval) {
 814                 CERROR("out of memory!\n");
 815                 RETURN(NULL);
 816         }
 817
 818         memcpy(retval, value, strlen(value)+1);
 819         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 820         RETURN(retval);
 821 }
 822
 823 static inline int ll_set_opt(const char *opt, char *data, int fl)
 824 {
 825         if (strncmp(opt, data, strlen(opt)) != 0)
 826                 return(0);
 827         else
 828                 return(fl);
 829 }
 830
 831 /* non-client-specific mount options are parsed in lmd_parse */
 832 static int ll_options(char *options, int *flags)
 833 {
 834         int tmp;
 835         char *s1 = options, *s2;
 836         ENTRY;
 837
 838         if (!options)
 839                 RETURN(0);
 840
 841         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 842
 843         while (*s1) {
 844                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 845                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 846                 if (tmp) {
 847                         *flags |= tmp;
 848                         goto next;
 849                 }
 850                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 851                 if (tmp) {
 852                         *flags |= tmp;
 853                         goto next;
 854                 }
 855                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 856                 if (tmp) {
 857                         *flags |= tmp;
 858                         goto next;
 859                 }
 860                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 861                 if (tmp) {
 862                         *flags &= ~tmp;
 863                         goto next;
 864                 }
 865                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 866                 if (tmp) {
 867                         *flags |= tmp;
 868                         goto next;
 869                 }
 870                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 871                 if (tmp) {
 872                         *flags &= ~tmp;
 873                         goto next;
 874                 }
 875                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 876                 if (tmp) {
 877                         /* Ignore deprecated mount option.  The client will
 878                          * always try to mount with ACL support, whether this
 879                          * is used depends on whether server supports it. */
 880                         goto next;
 881                 }
 882                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 883                 if (tmp) {
 884                         goto next;
 885                 }
 886                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 887                 if (tmp) {
 888                         *flags |= tmp;
 889                         goto next;
 890                 }
 891
 892                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 893                 if (tmp) {
 894                         *flags |= tmp;
 895                         goto next;
 896                 }
 897                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 898                 if (tmp) {
 899                         *flags &= ~tmp;
 900                         goto next;
 901                 }
 902                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 903                 if (tmp) {
 904                         *flags |= tmp;
 905                         goto next;
 906                 }
 907                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 908                 if (tmp) {
 909                         *flags &= ~tmp;
 910                         goto next;
 911                 }
 912
 913                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 914                                    s1);
 915                 RETURN(-EINVAL);
 916
 917 next:
 918                 /* Find next opt */
 919                 s2 = strchr(s1, ',');
 920                 if (s2 == NULL)
 921                         break;
 922                 s1 = s2 + 1;
 923         }
 924         RETURN(0);
 925 }
 926
 927 void ll_lli_init(struct ll_inode_info *lli)
 928 {
 929         lli->lli_inode_magic = LLI_INODE_MAGIC;
 930         sema_init(&lli->lli_size_sem, 1);
 931         sema_init(&lli->lli_write_sem, 1);
 932         lli->lli_flags = 0;
 933         lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
 934         spin_lock_init(&lli->lli_lock);
 935         INIT_LIST_HEAD(&lli->lli_pending_write_llaps);
 936         INIT_LIST_HEAD(&lli->lli_close_list);
 937         lli->lli_inode_magic = LLI_INODE_MAGIC;
 938         sema_init(&lli->lli_och_sem, 1);
 939         lli->lli_mds_read_och = lli->lli_mds_write_och = NULL;
 940         lli->lli_mds_exec_och = NULL;
 941         lli->lli_open_fd_read_count = lli->lli_open_fd_write_count = 0;
 942         lli->lli_open_fd_exec_count = 0;
 943         INIT_LIST_HEAD(&lli->lli_dead_list);
 944         lli->lli_remote_perms = NULL;
 945         lli->lli_rmtperm_utime = 0;
 946         sema_init(&lli->lli_rmtperm_sem, 1);
 947         INIT_LIST_HEAD(&lli->lli_oss_capas);
 948 }
 949
 950 int ll_fill_super(struct super_block *sb)
 951 {
 952         struct lustre_profile *lprof;
 953         struct lustre_sb_info *lsi = s2lsi(sb);
 954         struct ll_sb_info *sbi;
 955         char  *dt = NULL, *md = NULL;
 956         char  *profilenm = get_profile_name(sb);
 957         struct config_llog_instance cfg = {0, };
 958         char   ll_instance[sizeof(sb) * 2 + 1];
 959         int    err;
 960         ENTRY;
 961
 962         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 963
 964         cfs_module_get();
 965
 966         /* client additional sb info */
 967         lsi->lsi_llsbi = sbi = ll_init_sbi();
 968         if (!sbi) {
 969                 cfs_module_put();
 970                 RETURN(-ENOMEM);
 971         }
 972
 973         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 974         if (err)
 975                 GOTO(out_free, err);
 976
 977         /* Generate a string unique to this super, in case some joker tries
 978            to mount the same fs at two mount points.
 979            Use the address of the super itself.*/
 980         sprintf(ll_instance, "%p", sb);
 981         cfg.cfg_instance = ll_instance;
 982         cfg.cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 983
 984         /* set up client obds */
 985         err = lustre_process_log(sb, profilenm, &cfg);
 986         if (err < 0) {
 987                 CERROR("Unable to process log: %d\n", err);
 988                 GOTO(out_free, err);
 989         }
 990
 991         lprof = class_get_profile(profilenm);
 992         if (lprof == NULL) {
 993                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
 994                                    " read from the MGS.  Does that filesystem "
 995                                    "exist?\n", profilenm);
 996                 GOTO(out_free, err = -EINVAL);
 997         }
 998         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 999                lprof->lp_md, lprof->lp_dt);
1000
1001         OBD_ALLOC(dt, strlen(lprof->lp_dt) +
1002                   strlen(ll_instance) + 2);
1003         if (!dt)
1004                 GOTO(out_free, err = -ENOMEM);
1005         sprintf(dt, "%s-%s", lprof->lp_dt, ll_instance);
1006
1007         OBD_ALLOC(md, strlen(lprof->lp_md) +
1008                   strlen(ll_instance) + 2);
1009         if (!md)
1010                 GOTO(out_free, err = -ENOMEM);
1011         sprintf(md, "%s-%s", lprof->lp_md, ll_instance);
1012
1013         /* connections, registrations, sb setup */
1014         err = client_common_fill_super(sb, md, dt);
1015
1016 out_free:
1017         if (md)
1018                 OBD_FREE(md, strlen(md) + 1);
1019         if (dt)
1020                 OBD_FREE(dt, strlen(dt) + 1);
1021         if (err)
1022                 ll_put_super(sb);
1023         else
1024                 LCONSOLE_WARN("Client %s has started\n", profilenm);
1025
1026         RETURN(err);
1027 } /* ll_fill_super */
1028
1029
1030 void ll_put_super(struct super_block *sb)
1031 {
1032         struct config_llog_instance cfg;
1033         char   ll_instance[sizeof(sb) * 2 + 1];
1034         struct obd_device *obd;
1035         struct lustre_sb_info *lsi = s2lsi(sb);
1036         struct ll_sb_info *sbi = ll_s2sbi(sb);
1037         char *profilenm = get_profile_name(sb);
1038         int force = 1, next;
1039         ENTRY;
1040
1041         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1042
1043         ll_print_capa_stat(sbi);
1044
1045         sprintf(ll_instance, "%p", sb);
1046         cfg.cfg_instance = ll_instance;
1047         lustre_end_log(sb, NULL, &cfg);
1048
1049         if (sbi->ll_md_exp) {
1050                 obd = class_exp2obd(sbi->ll_md_exp);
1051                 if (obd)
1052                         force = obd->obd_force;
1053         }
1054
1055         /* We need to set force before the lov_disconnect in
1056            lustre_common_put_super, since l_d cleans up osc's as well. */
1057         if (force) {
1058                 next = 0;
1059                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1060                                                      &next)) != NULL) {
1061                         obd->obd_force = force;
1062                 }
1063         }
1064
1065         if (sbi->ll_lcq) {
1066                 /* Only if client_common_fill_super succeeded */
1067                 client_common_put_super(sb);
1068         }
1069         next = 0;
1070         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1071                 class_manual_cleanup(obd);
1072         }
1073
1074         if (profilenm)
1075                 class_del_profile(profilenm);
1076
1077         ll_free_sbi(sb);
1078         lsi->lsi_llsbi = NULL;
1079
1080         lustre_common_put_super(sb);
1081
1082         LCONSOLE_WARN("client %s umount complete\n", ll_instance);
1083
1084         cfs_module_put();
1085
1086         EXIT;
1087 } /* client_put_super */
1088
1089 #ifdef HAVE_REGISTER_CACHE
1090 #include <linux/cache_def.h>
1091 #ifdef HAVE_CACHE_RETURN_INT
1092 static int
1093 #else
1094 static void
1095 #endif
1096 ll_shrink_cache(int priority, unsigned int gfp_mask)
1097 {
1098         struct ll_sb_info *sbi;
1099         int count = 0;
1100
1101         list_for_each_entry(sbi, &ll_super_blocks, ll_list)
1102                 count += llap_shrink_cache(sbi, priority);
1103
1104 #ifdef HAVE_CACHE_RETURN_INT
1105         return count;
1106 #endif
1107 }
1108
1109 struct cache_definition ll_cache_definition = {
1110         .name = "llap_cache",
1111         .shrink = ll_shrink_cache
1112 };
1113 #endif /* HAVE_REGISTER_CACHE */
1114
1115 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1116 {
1117         struct inode *inode = NULL;
1118         /* NOTE: we depend on atomic igrab() -bzzz */
1119         lock_res_and_lock(lock);
1120         if (lock->l_ast_data) {
1121                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1122                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1123                         inode = igrab(lock->l_ast_data);
1124                 } else {
1125                         inode = lock->l_ast_data;
1126                         ldlm_lock_debug(NULL, inode->i_state & I_FREEING ?
1127                                                 D_INFO : D_WARNING,
1128                                         lock, __FILE__, __func__, __LINE__,
1129                                         "l_ast_data %p is bogus: magic %08x",
1130                                         lock->l_ast_data, lli->lli_inode_magic);
1131                         inode = NULL;
1132                 }
1133         }
1134         unlock_res_and_lock(lock);
1135         return inode;
1136 }
1137
1138 static int null_if_equal(struct ldlm_lock *lock, void *data)
1139 {
1140         if (data == lock->l_ast_data) {
1141                 lock->l_ast_data = NULL;
1142
1143                 if (lock->l_req_mode != lock->l_granted_mode)
1144                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1145         }
1146
1147         return LDLM_ITER_CONTINUE;
1148 }
1149
1150 void ll_clear_inode(struct inode *inode)
1151 {
1152         struct ll_inode_info *lli = ll_i2info(inode);
1153         struct ll_sb_info *sbi = ll_i2sbi(inode);
1154         ENTRY;
1155
1156         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1157                inode->i_generation, inode);
1158
1159         if (S_ISDIR(inode->i_mode)) {
1160                 /* these should have been cleared in ll_file_release */
1161                 LASSERT(lli->lli_sai == NULL);
1162                 LASSERT(lli->lli_opendir_key == NULL);
1163                 LASSERT(lli->lli_opendir_pid == 0);
1164         }
1165
1166         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1167         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1168                          null_if_equal, inode);
1169
1170         LASSERT(!lli->lli_open_fd_write_count);
1171         LASSERT(!lli->lli_open_fd_read_count);
1172         LASSERT(!lli->lli_open_fd_exec_count);
1173
1174         if (lli->lli_mds_write_och)
1175                 ll_md_real_close(inode, FMODE_WRITE);
1176         if (lli->lli_mds_exec_och)
1177                 ll_md_real_close(inode, FMODE_EXEC);
1178         if (lli->lli_mds_read_och)
1179                 ll_md_real_close(inode, FMODE_READ);
1180
1181         if (lli->lli_smd) {
1182                 obd_change_cbdata(sbi->ll_dt_exp, lli->lli_smd,
1183                                   null_if_equal, inode);
1184
1185                 obd_free_memmd(sbi->ll_dt_exp, &lli->lli_smd);
1186                 lli->lli_smd = NULL;
1187         }
1188
1189         if (lli->lli_symlink_name) {
1190                 OBD_FREE(lli->lli_symlink_name,
1191                          strlen(lli->lli_symlink_name) + 1);
1192                 lli->lli_symlink_name = NULL;
1193         }
1194
1195         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1196                 LASSERT(lli->lli_posix_acl == NULL);
1197                 if (lli->lli_remote_perms) {
1198                         free_rmtperm_hash(lli->lli_remote_perms);
1199                         lli->lli_remote_perms = NULL;
1200                 }
1201         }
1202 #ifdef CONFIG_FS_POSIX_ACL
1203         else if (lli->lli_posix_acl) {
1204                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1205                 LASSERT(lli->lli_remote_perms == NULL);
1206                 posix_acl_release(lli->lli_posix_acl);
1207                 lli->lli_posix_acl = NULL;
1208         }
1209 #endif
1210         lli->lli_inode_magic = LLI_INODE_DEAD;
1211
1212 #ifdef HAVE_EXPORT___IGET
1213         spin_lock(&sbi->ll_deathrow_lock);
1214         list_del_init(&lli->lli_dead_list);
1215         spin_unlock(&sbi->ll_deathrow_lock);
1216 #endif
1217         ll_clear_inode_capas(inode);
1218
1219         EXIT;
1220 }
1221
1222 int ll_md_setattr(struct inode *inode, struct md_op_data *op_data,
1223                   struct md_open_data **mod)
1224 {
1225         struct lustre_md md;
1226         struct ll_sb_info *sbi = ll_i2sbi(inode);
1227         struct ptlrpc_request *request = NULL;
1228         int rc;
1229         ENTRY;
1230
1231         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1232                                      LUSTRE_OPC_ANY, NULL);
1233         if (IS_ERR(op_data))
1234                 RETURN(PTR_ERR(op_data));
1235
1236         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1237                         &request, mod);
1238         if (rc) {
1239                 ptlrpc_req_finished(request);
1240                 if (rc == -ENOENT) {
1241                         inode->i_nlink = 0;
1242                         /* Unlinked special device node? Or just a race?
1243                          * Pretend we done everything. */
1244                         if (!S_ISREG(inode->i_mode) &&
1245                             !S_ISDIR(inode->i_mode))
1246                                 rc = inode_setattr(inode, &op_data->op_attr);
1247                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1248                         CERROR("md_setattr fails: rc = %d\n", rc);
1249                 }
1250                 RETURN(rc);
1251         }
1252
1253         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1254                               sbi->ll_md_exp, &md);
1255         if (rc) {
1256                 ptlrpc_req_finished(request);
1257                 RETURN(rc);
1258         }
1259
1260         /* We call inode_setattr to adjust timestamps.
1261          * If there is at least some data in file, we cleared ATTR_SIZE
1262          * above to avoid invoking vmtruncate, otherwise it is important
1263          * to call vmtruncate in inode_setattr to update inode->i_size
1264          * (bug 6196) */
1265         rc = inode_setattr(inode, &op_data->op_attr);
1266
1267         /* Extract epoch data if obtained. */
1268         op_data->op_handle = md.body->handle;
1269         op_data->op_ioepoch = md.body->ioepoch;
1270
1271         ll_update_inode(inode, &md);
1272         ptlrpc_req_finished(request);
1273
1274         RETURN(rc);
1275 }
1276
1277 /* Close IO epoch and send Size-on-MDS attribute update. */
1278 static int ll_setattr_done_writing(struct inode *inode,
1279                                    struct md_op_data *op_data,
1280                                    struct md_open_data *mod)
1281 {
1282         struct ll_inode_info *lli = ll_i2info(inode);
1283         int rc = 0;
1284         ENTRY;
1285
1286         LASSERT(op_data != NULL);
1287         if (!S_ISREG(inode->i_mode))
1288                 RETURN(0);
1289
1290         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1291                op_data->op_ioepoch, PFID(&lli->lli_fid));
1292
1293         op_data->op_flags = MF_EPOCH_CLOSE | MF_SOM_CHANGE;
1294         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1295         if (rc == -EAGAIN) {
1296                 /* MDS has instructed us to obtain Size-on-MDS attribute
1297                  * from OSTs and send setattr to back to MDS. */
1298                 rc = ll_sizeonmds_update(inode, mod, &op_data->op_handle,
1299                                          op_data->op_ioepoch);
1300         } else if (rc) {
1301                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1302                        inode->i_ino, rc);
1303         }
1304         RETURN(rc);
1305 }
1306
1307 static int ll_setattr_do_truncate(struct inode *inode, loff_t new_size)
1308 {
1309         struct ll_sb_info *sbi = ll_i2sbi(inode);
1310         struct ll_inode_info *lli = ll_i2info(inode);
1311         struct lov_stripe_md *lsm = lli->lli_smd;
1312         int rc;
1313         ldlm_policy_data_t policy = { .l_extent = {new_size,
1314                                                    OBD_OBJECT_EOF } };
1315         struct lustre_handle lockh = { 0 };
1316         int local_lock = 0; /* 0 - no local lock;
1317                              * 1 - lock taken by lock_extent;
1318                              * 2 - by obd_match*/
1319         int ast_flags;
1320         int err;
1321         ENTRY;
1322
1323         UNLOCK_INODE_MUTEX(inode);
1324         UP_WRITE_I_ALLOC_SEM(inode);
1325
1326         if (sbi->ll_lockless_truncate_enable &&
1327             (sbi->ll_lco.lco_flags & OBD_CONNECT_TRUNCLOCK)) {
1328                 ast_flags = LDLM_FL_BLOCK_GRANTED;
1329                 rc = obd_match(sbi->ll_dt_exp, lsm, LDLM_EXTENT,
1330                                &policy, LCK_PW, &ast_flags, inode, &lockh);
1331                 if (rc > 0) {
1332                         local_lock = 2;
1333                         rc = 0;
1334                 } else if (rc == 0) {
1335                         rc = ll_file_punch(inode, new_size, 1);
1336                 }
1337         } else {
1338                 /* XXX when we fix the AST intents to pass the discard-range
1339                  * XXX extent, make ast_flags always LDLM_AST_DISCARD_DATA
1340                  * XXX here. */
1341                 ast_flags = (new_size == 0) ? LDLM_AST_DISCARD_DATA : 0;
1342                 rc = ll_extent_lock(NULL, inode, lsm, LCK_PW, &policy,
1343                                     &lockh, ast_flags);
1344                 if (likely(rc == 0))
1345                         local_lock = 1;
1346         }
1347
1348         LOCK_INODE_MUTEX(inode);
1349         DOWN_WRITE_I_ALLOC_SEM(inode);
1350
1351         if (likely(rc == 0)) {
1352                 /* Only ll_inode_size_lock is taken at this level.
1353                  * lov_stripe_lock() is grabbed by ll_truncate() only over
1354                  * call to obd_adjust_kms().  If vmtruncate returns 0, then
1355                  * ll_truncate dropped ll_inode_size_lock() */
1356                 ll_inode_size_lock(inode, 0);
1357                 if (!local_lock) {
1358                         spin_lock(&lli->lli_lock);
1359                         lli->lli_flags |= LLIF_SRVLOCK;
1360                         spin_unlock(&lli->lli_lock);
1361                 }
1362                 rc = vmtruncate(inode, new_size);
1363                 if (!local_lock) {
1364                         spin_lock(&lli->lli_lock);
1365                         lli->lli_flags &= ~LLIF_SRVLOCK;
1366                         spin_unlock(&lli->lli_lock);
1367                 }
1368                 if (rc != 0) {
1369                         LASSERT(atomic_read(&lli->lli_size_sem.count) <= 0);
1370                         ll_inode_size_unlock(inode, 0);
1371                 }
1372         }
1373
1374         if (local_lock) {
1375                 if (local_lock == 2)
1376                         err = obd_cancel(sbi->ll_dt_exp, lsm, LCK_PW, &lockh);
1377                 else
1378                         err = ll_extent_unlock(NULL, inode, lsm, LCK_PW, &lockh);
1379                 if (unlikely(err != 0)){
1380                         CERROR("extent unlock failed: err=%d,"
1381                                " unlock method =%d\n", err, local_lock);
1382                         if (rc == 0)
1383                                 rc = err;
1384                 }
1385         }
1386         RETURN(rc);
1387 }
1388
1389 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1390  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1391  * keep these values until such a time that objects are allocated for it.
1392  * We do the MDS operations first, as it is checking permissions for us.
1393  * We don't to the MDS RPC if there is nothing that we want to store there,
1394  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1395  * going to do an RPC anyways.
1396  *
1397  * If we are doing a truncate, we will send the mtime and ctime updates
1398  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1399  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1400  * at the same time.
1401  */
1402 int ll_setattr_raw(struct inode *inode, struct iattr *attr)
1403 {
1404         struct ll_inode_info *lli = ll_i2info(inode);
1405         struct lov_stripe_md *lsm = lli->lli_smd;
1406         struct ll_sb_info *sbi = ll_i2sbi(inode);
1407         struct md_op_data *op_data = NULL;
1408         struct md_open_data *mod = NULL;
1409         int ia_valid = attr->ia_valid;
1410         int rc = 0, rc1 = 0;
1411         ENTRY;
1412
1413         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu valid %x\n", inode->i_ino,
1414                attr->ia_valid);
1415         ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETATTR, 1);
1416
1417         if (ia_valid & ATTR_SIZE) {
1418                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1419                         CDEBUG(D_INODE, "file too large %llu > "LPU64"\n",
1420                                attr->ia_size, ll_file_maxbytes(inode));
1421                         RETURN(-EFBIG);
1422                 }
1423
1424                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1425         }
1426
1427         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1428         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
1429                 if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
1430                         RETURN(-EPERM);
1431         }
1432
1433         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1434         if (attr->ia_valid & ATTR_CTIME) {
1435                 attr->ia_ctime = CURRENT_TIME;
1436                 attr->ia_valid |= ATTR_CTIME_SET;
1437         }
1438         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1439                 attr->ia_atime = CURRENT_TIME;
1440                 attr->ia_valid |= ATTR_ATIME_SET;
1441         }
1442         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1443                 attr->ia_mtime = CURRENT_TIME;
1444                 attr->ia_valid |= ATTR_MTIME_SET;
1445         }
1446         if ((attr->ia_valid & ATTR_CTIME) && !(attr->ia_valid & ATTR_MTIME)) {
1447                 /* To avoid stale mtime on mds, obtain it from ost and send
1448                    to mds. */
1449                 rc = ll_glimpse_size(inode, 0);
1450                 if (rc)
1451                         RETURN(rc);
1452
1453                 attr->ia_valid |= ATTR_MTIME_SET | ATTR_MTIME;
1454                 attr->ia_mtime = inode->i_mtime;
1455         }
1456
1457         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1458                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1459                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1460                        cfs_time_current_sec());
1461
1462         /* NB: ATTR_SIZE will only be set after this point if the size
1463          * resides on the MDS, ie, this file has no objects. */
1464         if (lsm)
1465                 attr->ia_valid &= ~ATTR_SIZE;
1466
1467         /* We always do an MDS RPC, even if we're only changing the size;
1468          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1469
1470         OBD_ALLOC_PTR(op_data);
1471         if (op_data == NULL)
1472                 RETURN(-ENOMEM);
1473
1474         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1475
1476         /* Open epoch for truncate. */
1477         if ((ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) &&
1478             (ia_valid & ATTR_SIZE))
1479                 op_data->op_flags = MF_EPOCH_OPEN;
1480
1481         rc = ll_md_setattr(inode, op_data, &mod);
1482         if (rc)
1483                 GOTO(out, rc);
1484
1485         if (op_data->op_ioepoch)
1486                 CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID" for "
1487                        "truncate\n", op_data->op_ioepoch, PFID(&lli->lli_fid));
1488
1489         if (!lsm || !S_ISREG(inode->i_mode)) {
1490                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
1491                 GOTO(out, rc = 0);
1492         }
1493
1494         /* We really need to get our PW lock before we change inode->i_size.
1495          * If we don't we can race with other i_size updaters on our node, like
1496          * ll_file_read.  We can also race with i_size propogation to other
1497          * nodes through dirtying and writeback of final cached pages.  This
1498          * last one is especially bad for racing o_append users on other
1499          * nodes. */
1500         if (ia_valid & ATTR_SIZE) {
1501                 rc = ll_setattr_do_truncate(inode, attr->ia_size);
1502         } else if (ia_valid & (ATTR_MTIME | ATTR_MTIME_SET)) {
1503                 obd_flag flags;
1504                 struct obd_info oinfo = { { { 0 } } };
1505                 struct obdo *oa;
1506
1507                 CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
1508                        inode->i_ino, LTIME_S(attr->ia_mtime));
1509
1510                 OBDO_ALLOC(oa);
1511                 if (oa) {
1512                         oa->o_id = lsm->lsm_object_id;
1513                         oa->o_gr = lsm->lsm_object_gr;
1514                         oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1515
1516                         flags = OBD_MD_FLTYPE | OBD_MD_FLATIME |
1517                                 OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1518                                 OBD_MD_FLFID | OBD_MD_FLGENER |
1519                                 OBD_MD_FLGROUP;
1520
1521                         obdo_from_inode(oa, inode, flags);
1522
1523                         oinfo.oi_oa = oa;
1524                         oinfo.oi_md = lsm;
1525                         oinfo.oi_capa = ll_mdscapa_get(inode);
1526
1527                         /* XXX: this looks unnecessary now. */
1528                         rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1529                         capa_put(oinfo.oi_capa);
1530                         if (rc)
1531                                 CERROR("obd_setattr_async fails: rc=%d\n", rc);
1532                         OBDO_FREE(oa);
1533                 } else {
1534                         rc = -ENOMEM;
1535                 }
1536         }
1537         EXIT;
1538 out:
1539         if (op_data) {
1540                 if (op_data->op_ioepoch)
1541                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1542                 ll_finish_md_op_data(op_data);
1543         }
1544         return rc ? rc : rc1;
1545 }
1546
1547 int ll_setattr(struct dentry *de, struct iattr *attr)
1548 {
1549         int mode;
1550
1551         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1552             (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1553                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1554
1555         return ll_setattr_raw(de->d_inode, attr);
1556 }
1557
1558 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1559                        __u64 max_age, __u32 flags)
1560 {
1561         struct ll_sb_info *sbi = ll_s2sbi(sb);
1562         struct obd_statfs obd_osfs;
1563         int rc;
1564         ENTRY;
1565
1566         rc = obd_statfs(class_exp2obd(sbi->ll_md_exp), osfs, max_age, flags);
1567         if (rc) {
1568                 CERROR("md_statfs fails: rc = %d\n", rc);
1569                 RETURN(rc);
1570         }
1571
1572         osfs->os_type = sb->s_magic;
1573
1574         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1575                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1576
1577         rc = obd_statfs_rqset(class_exp2obd(sbi->ll_dt_exp),
1578                               &obd_osfs, max_age, flags);
1579         if (rc) {
1580                 CERROR("obd_statfs fails: rc = %d\n", rc);
1581                 RETURN(rc);
1582         }
1583
1584         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1585                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1586                obd_osfs.os_files);
1587
1588         osfs->os_bsize = obd_osfs.os_bsize;
1589         osfs->os_blocks = obd_osfs.os_blocks;
1590         osfs->os_bfree = obd_osfs.os_bfree;
1591         osfs->os_bavail = obd_osfs.os_bavail;
1592
1593         /* If we don't have as many objects free on the OST as inodes
1594          * on the MDS, we reduce the total number of inodes to
1595          * compensate, so that the "inodes in use" number is correct.
1596          */
1597         if (obd_osfs.os_ffree < osfs->os_ffree) {
1598                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1599                         obd_osfs.os_ffree;
1600                 osfs->os_ffree = obd_osfs.os_ffree;
1601         }
1602
1603         RETURN(rc);
1604 }
1605 #ifndef HAVE_STATFS_DENTRY_PARAM
1606 int ll_statfs(struct super_block *sb, struct kstatfs *sfs)
1607 {
1608 #else
1609 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1610 {
1611         struct super_block *sb = de->d_sb;
1612 #endif
1613         struct obd_statfs osfs;
1614         int rc;
1615
1616         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1617         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1618
1619         /* For now we will always get up-to-date statfs values, but in the
1620          * future we may allow some amount of caching on the client (e.g.
1621          * from QOS or lprocfs updates). */
1622         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - 1, 0);
1623         if (rc)
1624                 return rc;
1625
1626         statfs_unpack(sfs, &osfs);
1627
1628         /* We need to downshift for all 32-bit kernels, because we can't
1629          * tell if the kernel is being called via sys_statfs64() or not.
1630          * Stop before overflowing f_bsize - in which case it is better
1631          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1632         if (sizeof(long) < 8) {
1633                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1634                         sfs->f_bsize <<= 1;
1635
1636                         osfs.os_blocks >>= 1;
1637                         osfs.os_bfree >>= 1;
1638                         osfs.os_bavail >>= 1;
1639                 }
1640         }
1641
1642         sfs->f_blocks = osfs.os_blocks;
1643         sfs->f_bfree = osfs.os_bfree;
1644         sfs->f_bavail = osfs.os_bavail;
1645
1646         return 0;
1647 }
1648
1649 void ll_inode_size_lock(struct inode *inode, int lock_lsm)
1650 {
1651         struct ll_inode_info *lli;
1652         struct lov_stripe_md *lsm;
1653
1654         lli = ll_i2info(inode);
1655         LASSERT(lli->lli_size_sem_owner != current);
1656         down(&lli->lli_size_sem);
1657         LASSERT(lli->lli_size_sem_owner == NULL);
1658         lli->lli_size_sem_owner = current;
1659         lsm = lli->lli_smd;
1660         LASSERTF(lsm != NULL || lock_lsm == 0, "lsm %p, lock_lsm %d\n",
1661                  lsm, lock_lsm);
1662         if (lock_lsm)
1663                 lov_stripe_lock(lsm);
1664 }
1665
1666 void ll_inode_size_unlock(struct inode *inode, int unlock_lsm)
1667 {
1668         struct ll_inode_info *lli;
1669         struct lov_stripe_md *lsm;
1670
1671         lli = ll_i2info(inode);
1672         lsm = lli->lli_smd;
1673         LASSERTF(lsm != NULL || unlock_lsm == 0, "lsm %p, lock_lsm %d\n",
1674                  lsm, unlock_lsm);
1675         if (unlock_lsm)
1676                 lov_stripe_unlock(lsm);
1677         LASSERT(lli->lli_size_sem_owner == current);
1678         lli->lli_size_sem_owner = NULL;
1679         up(&lli->lli_size_sem);
1680 }
1681
1682 static void ll_replace_lsm(struct inode *inode, struct lov_stripe_md *lsm)
1683 {
1684         struct ll_inode_info *lli = ll_i2info(inode);
1685
1686         dump_lsm(D_INODE, lsm);
1687         dump_lsm(D_INODE, lli->lli_smd);
1688         LASSERTF(lsm->lsm_magic == LOV_MAGIC_JOIN,
1689                  "lsm must be joined lsm %p\n", lsm);
1690         obd_free_memmd(ll_i2dtexp(inode), &lli->lli_smd);
1691         CDEBUG(D_INODE, "replace lsm %p to lli_smd %p for inode %lu%u(%p)\n",
1692                lsm, lli->lli_smd, inode->i_ino, inode->i_generation, inode);
1693         lli->lli_smd = lsm;
1694         lli->lli_maxbytes = lsm->lsm_maxbytes;
1695         if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
1696                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
1697 }
1698
1699 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1700 {
1701         struct ll_inode_info *lli = ll_i2info(inode);
1702         struct mdt_body *body = md->body;
1703         struct lov_stripe_md *lsm = md->lsm;
1704         struct ll_sb_info *sbi = ll_i2sbi(inode);
1705
1706         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1707         if (lsm != NULL) {
1708                 if (lli->lli_smd == NULL) {
1709                         if (lsm->lsm_magic != LOV_MAGIC &&
1710                             lsm->lsm_magic != LOV_MAGIC_JOIN) {
1711                                 dump_lsm(D_ERROR, lsm);
1712                                 LBUG();
1713                         }
1714                         CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
1715                                lsm, inode->i_ino, inode->i_generation, inode);
1716                         /* ll_inode_size_lock() requires it is only called
1717                          * with lli_smd != NULL or lock_lsm == 0 or we can
1718                          * race between lock/unlock.  bug 9547 */
1719                         lli->lli_smd = lsm;
1720                         lli->lli_maxbytes = lsm->lsm_maxbytes;
1721                         if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
1722                                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
1723                 } else {
1724                         if (lli->lli_smd->lsm_magic == lsm->lsm_magic &&
1725                              lli->lli_smd->lsm_stripe_count ==
1726                                         lsm->lsm_stripe_count) {
1727                                 if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
1728                                         CERROR("lsm mismatch for inode %ld\n",
1729                                                 inode->i_ino);
1730                                         CERROR("lli_smd:\n");
1731                                         dump_lsm(D_ERROR, lli->lli_smd);
1732                                         CERROR("lsm:\n");
1733                                         dump_lsm(D_ERROR, lsm);
1734                                         LBUG();
1735                                 }
1736                         } else
1737                                 ll_replace_lsm(inode, lsm);
1738                 }
1739                 if (lli->lli_smd != lsm)
1740                         obd_free_memmd(ll_i2dtexp(inode), &lsm);
1741         }
1742
1743         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1744                 if (body->valid & OBD_MD_FLRMTPERM)
1745                         ll_update_remote_perm(inode, md->remote_perm);
1746         }
1747 #ifdef CONFIG_FS_POSIX_ACL
1748         else if (body->valid & OBD_MD_FLACL) {
1749                 spin_lock(&lli->lli_lock);
1750                 if (lli->lli_posix_acl)
1751                         posix_acl_release(lli->lli_posix_acl);
1752                 lli->lli_posix_acl = md->posix_acl;
1753                 spin_unlock(&lli->lli_lock);
1754         }
1755 #endif
1756         inode->i_ino = ll_fid_build_ino(sbi, &body->fid1);
1757
1758         if (body->valid & OBD_MD_FLATIME &&
1759             body->atime > LTIME_S(inode->i_atime))
1760                 LTIME_S(inode->i_atime) = body->atime;
1761
1762         /* mtime is always updated with ctime, but can be set in past.
1763            As write and utime(2) may happen within 1 second, and utime's
1764            mtime has a priority over write's one, so take mtime from mds
1765            for the same ctimes. */
1766         if (body->valid & OBD_MD_FLCTIME &&
1767             body->ctime >= LTIME_S(inode->i_ctime)) {
1768                 LTIME_S(inode->i_ctime) = body->ctime;
1769                 if (body->valid & OBD_MD_FLMTIME) {
1770                         CDEBUG(D_INODE, "setting ino %lu mtime "
1771                                "from %lu to "LPU64"\n", inode->i_ino,
1772                                LTIME_S(inode->i_mtime), body->mtime);
1773                         LTIME_S(inode->i_mtime) = body->mtime;
1774                 }
1775         }
1776         if (body->valid & OBD_MD_FLMODE)
1777                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1778         if (body->valid & OBD_MD_FLTYPE)
1779                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1780         if (S_ISREG(inode->i_mode)) {
1781                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1782         } else {
1783                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1784         }
1785 #ifdef HAVE_INODE_BLKSIZE
1786         inode->i_blksize = 1<<inode->i_blkbits;
1787 #endif
1788         if (body->valid & OBD_MD_FLUID)
1789                 inode->i_uid = body->uid;
1790         if (body->valid & OBD_MD_FLGID)
1791                 inode->i_gid = body->gid;
1792         if (body->valid & OBD_MD_FLFLAGS)
1793                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1794         if (body->valid & OBD_MD_FLNLINK)
1795                 inode->i_nlink = body->nlink;
1796         if (body->valid & OBD_MD_FLRDEV)
1797                 inode->i_rdev = old_decode_dev(body->rdev);
1798
1799         if (body->valid & OBD_MD_FLID) {
1800                 /* FID shouldn't be changed! */
1801                 if (fid_is_sane(&lli->lli_fid)) {
1802                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1803                                  "Trying to change FID "DFID
1804                                  " to the "DFID", inode %lu/%u(%p)\n",
1805                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1806                                  inode->i_ino, inode->i_generation, inode);
1807                 } else
1808                         lli->lli_fid = body->fid1;
1809         }
1810
1811         LASSERT(fid_seq(&lli->lli_fid) != 0);
1812
1813         if (body->valid & OBD_MD_FLSIZE) {
1814                 if ((ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) &&
1815                     S_ISREG(inode->i_mode) && lli->lli_smd) {
1816                         struct lustre_handle lockh;
1817                         ldlm_mode_t mode;
1818
1819                         /* As it is possible a blocking ast has been processed
1820                          * by this time, we need to check there is an UPDATE
1821                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1822                          * it. */
1823                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1824                                                &lockh);
1825                         if (mode) {
1826                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1827                                                       LLIF_EPOCH_PENDING |
1828                                                       LLIF_SOM_DIRTY)) {
1829                                         CERROR("ino %lu flags %lu still has "
1830                                                "size authority! do not trust "
1831                                                "the size got from MDS\n",
1832                                                inode->i_ino, lli->lli_flags);
1833                                 } else {
1834                                         /* Use old size assignment to avoid
1835                                          * deadlock bz14138 & bz14326 */
1836                                         inode->i_size = body->size;
1837                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1838                                 }
1839                                 ldlm_lock_decref(&lockh, mode);
1840                         }
1841                 } else {
1842                         /* Use old size assignment to avoid
1843                          * deadlock bz14138 & bz14326 */
1844                         inode->i_size = body->size;
1845                 }
1846
1847                 if (body->valid & OBD_MD_FLBLOCKS)
1848                         inode->i_blocks = body->blocks;
1849         }
1850
1851         if (body->valid & OBD_MD_FLMDSCAPA) {
1852                 LASSERT(md->mds_capa);
1853                 ll_add_capa(inode, md->mds_capa);
1854         }
1855         if (body->valid & OBD_MD_FLOSSCAPA) {
1856                 LASSERT(md->oss_capa);
1857                 ll_add_capa(inode, md->oss_capa);
1858         }
1859 }
1860
1861 static struct backing_dev_info ll_backing_dev_info = {
1862         .ra_pages       = 0,    /* No readahead */
1863 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12))
1864         .capabilities   = 0,    /* Does contribute to dirty memory */
1865 #else
1866         .memory_backed  = 0,    /* Does contribute to dirty memory */
1867 #endif
1868 };
1869
1870 void ll_read_inode2(struct inode *inode, void *opaque)
1871 {
1872         struct lustre_md *md = opaque;
1873         struct ll_inode_info *lli = ll_i2info(inode);
1874         ENTRY;
1875
1876         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
1877                inode->i_ino, inode->i_generation, inode);
1878
1879         ll_lli_init(lli);
1880
1881         LASSERT(!lli->lli_smd);
1882
1883         /* Core attributes from the MDS first.  This is a new inode, and
1884          * the VFS doesn't zero times in the core inode so we have to do
1885          * it ourselves.  They will be overwritten by either MDS or OST
1886          * attributes - we just need to make sure they aren't newer. */
1887         LTIME_S(inode->i_mtime) = 0;
1888         LTIME_S(inode->i_atime) = 0;
1889         LTIME_S(inode->i_ctime) = 0;
1890         inode->i_rdev = 0;
1891         ll_update_inode(inode, md);
1892
1893         /* OIDEBUG(inode); */
1894
1895         if (S_ISREG(inode->i_mode)) {
1896                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1897                 inode->i_op = &ll_file_inode_operations;
1898                 inode->i_fop = sbi->ll_fop;
1899                 inode->i_mapping->a_ops = &ll_aops;
1900                 EXIT;
1901         } else if (S_ISDIR(inode->i_mode)) {
1902                 inode->i_op = &ll_dir_inode_operations;
1903                 inode->i_fop = &ll_dir_operations;
1904                 inode->i_mapping->a_ops = &ll_dir_aops;
1905                 EXIT;
1906         } else if (S_ISLNK(inode->i_mode)) {
1907                 inode->i_op = &ll_fast_symlink_inode_operations;
1908                 EXIT;
1909         } else {
1910                 inode->i_op = &ll_special_inode_operations;
1911
1912                 init_special_inode(inode, inode->i_mode,
1913                                    kdev_t_to_nr(inode->i_rdev));
1914
1915                 /* initializing backing dev info. */
1916                 inode->i_mapping->backing_dev_info = &ll_backing_dev_info;
1917
1918                 EXIT;
1919         }
1920 }
1921
1922 void ll_delete_inode(struct inode *inode)
1923 {
1924         struct ll_sb_info *sbi = ll_i2sbi(inode);
1925         int rc;
1926         ENTRY;
1927
1928         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
1929         if (rc) {
1930                 CERROR("fid_delete() failed, rc %d\n", rc);
1931         }
1932         truncate_inode_pages(&inode->i_data, 0);
1933         clear_inode(inode);
1934
1935         EXIT;
1936 }
1937
1938 int ll_iocontrol(struct inode *inode, struct file *file,
1939                  unsigned int cmd, unsigned long arg)
1940 {
1941         struct ll_sb_info *sbi = ll_i2sbi(inode);
1942         struct ptlrpc_request *req = NULL;
1943         int rc, flags = 0;
1944         ENTRY;
1945
1946         switch(cmd) {
1947         case EXT3_IOC_GETFLAGS: {
1948                 struct mdt_body *body;
1949                 struct obd_capa *oc;
1950
1951                 oc = ll_mdscapa_get(inode);
1952                 rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
1953                                 OBD_MD_FLFLAGS, 0, &req);
1954                 capa_put(oc);
1955                 if (rc) {
1956                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1957                         RETURN(-abs(rc));
1958                 }
1959
1960                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1961
1962                 flags = body->flags;
1963
1964                 ptlrpc_req_finished(req);
1965
1966                 RETURN(put_user(flags, (int *)arg));
1967         }
1968         case EXT3_IOC_SETFLAGS: {
1969                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
1970                 struct obd_info oinfo = { { { 0 } } };
1971                 struct md_op_data *op_data;
1972
1973                 if (get_user(flags, (int *)arg))
1974                         RETURN(-EFAULT);
1975
1976                 oinfo.oi_md = lsm;
1977                 OBDO_ALLOC(oinfo.oi_oa);
1978                 if (!oinfo.oi_oa)
1979                         RETURN(-ENOMEM);
1980
1981                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1982                                              LUSTRE_OPC_ANY, NULL);
1983                 if (IS_ERR(op_data))
1984                         RETURN(PTR_ERR(op_data));
1985
1986                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1987                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1988                 rc = md_setattr(sbi->ll_md_exp, op_data,
1989                                 NULL, 0, NULL, 0, &req, NULL);
1990                 ll_finish_md_op_data(op_data);
1991                 ptlrpc_req_finished(req);
1992                 if (rc || lsm == NULL) {
1993                         OBDO_FREE(oinfo.oi_oa);
1994                         RETURN(rc);
1995                 }
1996
1997                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1998                 oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
1999                 oinfo.oi_oa->o_flags = flags;
2000                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2001                                        OBD_MD_FLGROUP;
2002                 oinfo.oi_capa = ll_mdscapa_get(inode);
2003
2004                 obdo_from_inode(oinfo.oi_oa, inode,
2005                                 OBD_MD_FLFID | OBD_MD_FLGENER);
2006                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2007                 capa_put(oinfo.oi_capa);
2008                 OBDO_FREE(oinfo.oi_oa);
2009                 if (rc) {
2010                         if (rc != -EPERM && rc != -EACCES)
2011                                 CERROR("md_setattr_async fails: rc = %d\n", rc);
2012                         RETURN(rc);
2013                 }
2014
2015                 inode->i_flags = ll_ext_to_inode_flags(flags |
2016                                                        MDS_BFLAG_EXT_FLAGS);
2017                 RETURN(0);
2018         }
2019         default:
2020                 RETURN(-ENOSYS);
2021         }
2022
2023         RETURN(0);
2024 }
2025
2026 int ll_flush_ctx(struct inode *inode)
2027 {
2028         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2029
2030         CDEBUG(D_SEC, "flush context for user %d\n", current->uid);
2031
2032         obd_set_info_async(sbi->ll_md_exp,
2033                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2034                            0, NULL, NULL);
2035         obd_set_info_async(sbi->ll_dt_exp,
2036                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2037                            0, NULL, NULL);
2038         return 0;
2039 }
2040
2041 /* umount -f client means force down, don't save state */
2042 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2043 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2044 {
2045         struct super_block *sb = vfsmnt->mnt_sb;
2046 #else
2047 void ll_umount_begin(struct super_block *sb)
2048 {
2049 #endif
2050         struct lustre_sb_info *lsi = s2lsi(sb);
2051         struct ll_sb_info *sbi = ll_s2sbi(sb);
2052         struct obd_device *obd;
2053         struct obd_ioctl_data ioc_data = { 0 };
2054         ENTRY;
2055
2056 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2057         if (!(flags & MNT_FORCE)) {
2058                 EXIT;
2059                 return;
2060         }
2061 #endif
2062
2063         /* Tell the MGC we got umount -f */
2064         lsi->lsi_flags |= LSI_UMOUNT_FORCE;
2065
2066         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2067                sb->s_count, atomic_read(&sb->s_active));
2068
2069         obd = class_exp2obd(sbi->ll_md_exp);
2070         if (obd == NULL) {
2071                 CERROR("Invalid MDC connection handle "LPX64"\n",
2072                        sbi->ll_md_exp->exp_handle.h_cookie);
2073                 EXIT;
2074                 return;
2075         }
2076         obd->obd_force = 1;
2077         obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp, sizeof ioc_data,
2078                       &ioc_data, NULL);
2079
2080         obd = class_exp2obd(sbi->ll_dt_exp);
2081         if (obd == NULL) {
2082                 CERROR("Invalid LOV connection handle "LPX64"\n",
2083                        sbi->ll_dt_exp->exp_handle.h_cookie);
2084                 EXIT;
2085                 return;
2086         }
2087
2088         obd->obd_force = 1;
2089         obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp, sizeof ioc_data,
2090                       &ioc_data, NULL);
2091
2092         /* Really, we'd like to wait until there are no requests outstanding,
2093          * and then continue.  For now, we just invalidate the requests,
2094          * schedule, and hope.
2095          */
2096         schedule();
2097
2098         EXIT;
2099 }
2100
2101 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2102 {
2103         struct ll_sb_info *sbi = ll_s2sbi(sb);
2104         int err;
2105         __u32 read_only;
2106
2107         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2108                 read_only = *flags & MS_RDONLY;
2109                 err = obd_set_info_async(sbi->ll_md_exp,
2110                                          sizeof(KEY_READ_ONLY),
2111                                          KEY_READ_ONLY, sizeof(read_only),
2112                                          &read_only, NULL);
2113                 if (err) {
2114                         CERROR("Failed to change the read-only flag during "
2115                                "remount: %d\n", err);
2116                         return err;
2117                 }
2118
2119                 if (read_only)
2120                         sb->s_flags |= MS_RDONLY;
2121                 else
2122                         sb->s_flags &= ~MS_RDONLY;
2123         }
2124         return 0;
2125 }
2126
2127 int ll_prep_inode(struct inode **inode,
2128                   struct ptlrpc_request *req,
2129                   struct super_block *sb)
2130 {
2131         struct ll_sb_info *sbi = NULL;
2132         struct lustre_md md;
2133         int rc = 0;
2134         ENTRY;
2135
2136         LASSERT(*inode || sb);
2137         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2138         prune_deathrow(sbi, 1);
2139         memset(&md, 0, sizeof(struct lustre_md));
2140
2141         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2142                               sbi->ll_md_exp, &md);
2143         if (rc)
2144                 RETURN(rc);
2145
2146         if (*inode) {
2147                 ll_update_inode(*inode, &md);
2148         } else {
2149                 LASSERT(sb != NULL);
2150
2151                 /*
2152                  * At this point server returns to client's same fid as client
2153                  * generated for creating. So using ->fid1 is okay here.
2154                  */
2155                 LASSERT(fid_is_sane(&md.body->fid1));
2156
2157                 *inode = ll_iget(sb, ll_fid_build_ino(sbi, &md.body->fid1), &md);
2158                 if (*inode == NULL || is_bad_inode(*inode)) {
2159                         if (md.lsm)
2160                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2161 #ifdef CONFIG_FS_POSIX_ACL
2162                         if (md.posix_acl) {
2163                                 posix_acl_release(md.posix_acl);
2164                                 md.posix_acl = NULL;
2165                         }
2166 #endif
2167                         rc = -ENOMEM;
2168                         CERROR("new_inode -fatal: rc %d\n", rc);
2169                         GOTO(out, rc);
2170                 }
2171         }
2172
2173         rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp,
2174                          ll_i2info(*inode)->lli_smd);
2175 out:
2176         md_free_lustre_md(sbi->ll_md_exp, &md);
2177         RETURN(rc);
2178 }
2179
2180 char *llap_origins[] = {
2181         [LLAP_ORIGIN_UNKNOWN] = "--",
2182         [LLAP_ORIGIN_READPAGE] = "rp",
2183         [LLAP_ORIGIN_READAHEAD] = "ra",
2184         [LLAP_ORIGIN_COMMIT_WRITE] = "cw",
2185         [LLAP_ORIGIN_WRITEPAGE] = "wp",
2186         [LLAP_ORIGIN_LOCKLESS_IO] = "ls"
2187 };
2188
2189 struct ll_async_page *llite_pglist_next_llap(struct ll_sb_info *sbi,
2190                                              struct list_head *list)
2191 {
2192         struct ll_async_page *llap;
2193         struct list_head *pos;
2194
2195         list_for_each(pos, list) {
2196                 if (pos == &sbi->ll_pglist)
2197                         return NULL;
2198                 llap = list_entry(pos, struct ll_async_page, llap_pglist_item);
2199                 if (llap->llap_page == NULL)
2200                         continue;
2201                 return llap;
2202         }
2203         LBUG();
2204         return NULL;
2205 }
2206
2207 int ll_obd_statfs(struct inode *inode, void *arg)
2208 {
2209         struct ll_sb_info *sbi = NULL;
2210         struct obd_export *exp;
2211         char *buf = NULL;
2212         struct obd_ioctl_data *data = NULL;
2213         __u32 type;
2214         int len = 0, rc;
2215
2216         if (!inode || !(sbi = ll_i2sbi(inode)))
2217                 GOTO(out_statfs, rc = -EINVAL);
2218
2219         rc = obd_ioctl_getdata(&buf, &len, arg);
2220         if (rc)
2221                 GOTO(out_statfs, rc);
2222
2223         data = (void*)buf;
2224         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2225             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2226                 GOTO(out_statfs, rc = -EINVAL);
2227
2228         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2229         if (type == LL_STATFS_MDC)
2230                 exp = sbi->ll_md_exp;
2231         else if (type == LL_STATFS_LOV)
2232                 exp = sbi->ll_dt_exp;
2233         else
2234                 GOTO(out_statfs, rc = -ENODEV);
2235
2236         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, NULL);
2237         if (rc)
2238                 GOTO(out_statfs, rc);
2239 out_statfs:
2240         if (buf)
2241                 obd_ioctl_freedata(buf, len);
2242         return rc;
2243 }
2244
2245 int ll_process_config(struct lustre_cfg *lcfg)
2246 {
2247         char *ptr;
2248         void *sb;
2249         struct lprocfs_static_vars lvars;
2250         unsigned long x;
2251         int rc = 0;
2252
2253         lprocfs_llite_init_vars(&lvars);
2254
2255         /* The instance name contains the sb: lustre-client-aacfe000 */
2256         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2257         if (!ptr || !*(++ptr))
2258                 return -EINVAL;
2259         if (sscanf(ptr, "%lx", &x) != 1)
2260                 return -EINVAL;
2261         sb = (void *)x;
2262         /* This better be a real Lustre superblock! */
2263         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2264
2265         /* Note we have not called client_common_fill_super yet, so
2266            proc fns must be able to handle that! */
2267         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2268                                       lcfg, sb);
2269         return(rc);
2270 }
2271
2272 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2273 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2274                                        struct inode *i1, struct inode *i2,
2275                                        const char *name, int namelen,
2276                                        int mode, __u32 opc, void *data)
2277 {
2278         LASSERT(i1 != NULL);
2279
2280         if (namelen > ll_i2sbi(i1)->ll_namelen)
2281                 return ERR_PTR(-ENAMETOOLONG);
2282
2283         if (op_data == NULL)
2284                 OBD_ALLOC_PTR(op_data);
2285
2286         if (op_data == NULL)
2287                 return ERR_PTR(-ENOMEM);
2288
2289         ll_i2gids(op_data->op_suppgids, i1, i2);
2290         op_data->op_fid1 = *ll_inode2fid(i1);
2291         op_data->op_capa1 = ll_mdscapa_get(i1);
2292
2293         if (i2) {
2294                 op_data->op_fid2 = *ll_inode2fid(i2);
2295                 op_data->op_capa2 = ll_mdscapa_get(i2);
2296         } else {
2297                 fid_zero(&op_data->op_fid2);
2298                 op_data->op_capa2 = NULL;
2299         }
2300
2301         op_data->op_name = name;
2302         op_data->op_namelen = namelen;
2303         op_data->op_mode = mode;
2304         op_data->op_mod_time = cfs_time_current_sec();
2305         op_data->op_fsuid = current->fsuid;
2306         op_data->op_fsgid = current->fsgid;
2307         op_data->op_cap = current->cap_effective;
2308         op_data->op_bias = MDS_CHECK_SPLIT;
2309         op_data->op_opc = opc;
2310         op_data->op_mds = 0;
2311         op_data->op_data = data;
2312
2313         return op_data;
2314 }
2315
2316 void ll_finish_md_op_data(struct md_op_data *op_data)
2317 {
2318         capa_put(op_data->op_capa1);
2319         capa_put(op_data->op_capa2);
2320         OBD_FREE_PTR(op_data);
2321 }