lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  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/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/version.h>
  47 #include <linux/mm.h>
  48 #include <linux/user_namespace.h>
  49 #ifdef HAVE_UIDGID_HEADER
  50 # include <linux/uidgid.h>
  51 #endif
  52
  53 #include <lustre_ioctl.h>
  54 #include <lustre_ha.h>
  55 #include <lustre_dlm.h>
  56 #include <lprocfs_status.h>
  57 #include <lustre_disk.h>
  58 #include <lustre_param.h>
  59 #include <lustre_log.h>
  60 #include <cl_object.h>
  61 #include <obd_cksum.h>
  62 #include "llite_internal.h"
  63
  64 struct kmem_cache *ll_file_data_slab;
  65
  66 #ifndef log2
  67 #define log2(n) ffz(~(n))
  68 #endif
  69
  70 static struct ll_sb_info *ll_init_sbi(void)
  71 {
  72         struct ll_sb_info *sbi = NULL;
  73         unsigned long pages;
  74         unsigned long lru_page_max;
  75         struct sysinfo si;
  76         class_uuid_t uuid;
  77         int i;
  78         ENTRY;
  79
  80         OBD_ALLOC_PTR(sbi);
  81         if (sbi == NULL)
  82                 RETURN(NULL);
  83
  84         spin_lock_init(&sbi->ll_lock);
  85         mutex_init(&sbi->ll_lco.lco_lock);
  86         spin_lock_init(&sbi->ll_pp_extent_lock);
  87         spin_lock_init(&sbi->ll_process_lock);
  88         sbi->ll_rw_stats_on = 0;
  89
  90         si_meminfo(&si);
  91         pages = si.totalram - si.totalhigh;
  92         lru_page_max = pages / 2;
  93
  94         /* initialize ll_cache data */
  95         sbi->ll_cache = cl_cache_init(lru_page_max);
  96         if (sbi->ll_cache == NULL) {
  97                 OBD_FREE(sbi, sizeof(*sbi));
  98                 RETURN(NULL);
  99         }
 100
 101         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 102                                            SBI_DEFAULT_READAHEAD_MAX);
 103         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 104         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 105                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 106         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 107         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 108
 109         ll_generate_random_uuid(uuid);
 110         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 111         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 112
 113         sbi->ll_flags |= LL_SBI_VERBOSE;
 114 #ifdef ENABLE_CHECKSUM
 115         sbi->ll_flags |= LL_SBI_CHECKSUM;
 116 #endif
 117
 118 #ifdef HAVE_LRU_RESIZE_SUPPORT
 119         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 120 #endif
 121
 122         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 123                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 124                                pp_r_hist.oh_lock);
 125                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 126                                pp_w_hist.oh_lock);
 127         }
 128
 129         /* metadata statahead is enabled by default */
 130         sbi->ll_sa_max = LL_SA_RPC_DEF;
 131         atomic_set(&sbi->ll_sa_total, 0);
 132         atomic_set(&sbi->ll_sa_wrong, 0);
 133         atomic_set(&sbi->ll_sa_running, 0);
 134         atomic_set(&sbi->ll_agl_total, 0);
 135         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 136
 137         /* root squash */
 138         sbi->ll_squash.rsi_uid = 0;
 139         sbi->ll_squash.rsi_gid = 0;
 140         INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
 141         init_rwsem(&sbi->ll_squash.rsi_sem);
 142
 143         RETURN(sbi);
 144 }
 145
 146 static void ll_free_sbi(struct super_block *sb)
 147 {
 148         struct ll_sb_info *sbi = ll_s2sbi(sb);
 149         ENTRY;
 150
 151         if (sbi != NULL) {
 152                 if (!list_empty(&sbi->ll_squash.rsi_nosquash_nids))
 153                         cfs_free_nidlist(&sbi->ll_squash.rsi_nosquash_nids);
 154                 if (sbi->ll_cache != NULL) {
 155                         cl_cache_decref(sbi->ll_cache);
 156                         sbi->ll_cache = NULL;
 157                 }
 158                 OBD_FREE(sbi, sizeof(*sbi));
 159         }
 160         EXIT;
 161 }
 162
 163 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 164                                     struct vfsmount *mnt)
 165 {
 166         struct inode *root = NULL;
 167         struct ll_sb_info *sbi = ll_s2sbi(sb);
 168         struct obd_device *obd;
 169         struct obd_statfs *osfs = NULL;
 170         struct ptlrpc_request *request = NULL;
 171         struct obd_connect_data *data = NULL;
 172         struct obd_uuid *uuid;
 173         struct md_op_data *op_data;
 174         struct lustre_md lmd;
 175         u64 valid;
 176         int size, err, checksum;
 177         ENTRY;
 178
 179         obd = class_name2obd(md);
 180         if (!obd) {
 181                 CERROR("MD %s: not setup or attached\n", md);
 182                 RETURN(-EINVAL);
 183         }
 184
 185         OBD_ALLOC_PTR(data);
 186         if (data == NULL)
 187                 RETURN(-ENOMEM);
 188
 189         OBD_ALLOC_PTR(osfs);
 190         if (osfs == NULL) {
 191                 OBD_FREE_PTR(data);
 192                 RETURN(-ENOMEM);
 193         }
 194
 195         /* indicate the features supported by this client */
 196         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 197                                   OBD_CONNECT_ATTRFID  |
 198                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 199                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 200                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 201                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 202                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 203                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 204                                   OBD_CONNECT_EINPROGRESS |
 205                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 206                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 207                                   OBD_CONNECT_MAX_EASIZE |
 208                                   OBD_CONNECT_FLOCK_DEAD |
 209                                   OBD_CONNECT_DISP_STRIPE | OBD_CONNECT_LFSCK |
 210                                   OBD_CONNECT_OPEN_BY_FID |
 211                                   OBD_CONNECT_DIR_STRIPE |
 212                                   OBD_CONNECT_BULK_MBITS;
 213
 214 #ifdef HAVE_LRU_RESIZE_SUPPORT
 215         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 216                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 217 #endif
 218 #ifdef CONFIG_FS_POSIX_ACL
 219         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 220 #endif
 221
 222         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 223                 /* flag mdc connection as lightweight, only used for test
 224                  * purpose, use with care */
 225                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 226
 227         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 228         data->ocd_version = LUSTRE_VERSION_CODE;
 229
 230         if (sb->s_flags & MS_RDONLY)
 231                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 232         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 233                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 234
 235 #ifdef HAVE_MS_FLOCK_LOCK
 236         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 237         sb->s_flags |= MS_FLOCK_LOCK;
 238 #endif
 239 #ifdef MS_HAS_NEW_AOPS
 240         sb->s_flags |= MS_HAS_NEW_AOPS;
 241 #endif
 242
 243         if (sbi->ll_flags & LL_SBI_FLOCK)
 244                 sbi->ll_fop = &ll_file_operations_flock;
 245         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 246                 sbi->ll_fop = &ll_file_operations;
 247         else
 248                 sbi->ll_fop = &ll_file_operations_noflock;
 249
 250         /* real client */
 251         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 252         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 253                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 254
 255         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 256
 257         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 258         if (err == -EBUSY) {
 259                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 260                                    "recovery, of which this client is not a "
 261                                    "part. Please wait for recovery to complete,"
 262                                    " abort, or time out.\n", md);
 263                 GOTO(out, err);
 264         } else if (err) {
 265                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 266                 GOTO(out, err);
 267         }
 268
 269         sbi->ll_md_exp->exp_connect_data = *data;
 270
 271         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 272                            LUSTRE_SEQ_METADATA);
 273         if (err) {
 274                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 275                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 276                 GOTO(out_md, err);
 277         }
 278
 279         /* For mount, we only need fs info from MDT0, and also in DNE, it
 280          * can make sure the client can be mounted as long as MDT0 is
 281          * avaible */
 282         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 283                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 284                         OBD_STATFS_FOR_MDT0);
 285         if (err)
 286                 GOTO(out_md_fid, err);
 287
 288         /* This needs to be after statfs to ensure connect has finished.
 289          * Note that "data" does NOT contain the valid connect reply.
 290          * If connecting to a 1.8 server there will be no LMV device, so
 291          * we can access the MDC export directly and exp_connect_flags will
 292          * be non-zero, but if accessing an upgraded 2.1 server it will
 293          * have the correct flags filled in.
 294          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 295         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 296         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 297             valid != CLIENT_CONNECT_MDT_REQD) {
 298                 char *buf;
 299
 300                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 301                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 302                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 303                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 304                                    "feature(s) needed for correct operation "
 305                                    "of this client (%s). Please upgrade "
 306                                    "server or downgrade client.\n",
 307                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 308                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 309                 GOTO(out_md_fid, err = -EPROTO);
 310         }
 311
 312         size = sizeof(*data);
 313         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 314                            KEY_CONN_DATA,  &size, data);
 315         if (err) {
 316                 CERROR("%s: Get connect data failed: rc = %d\n",
 317                        sbi->ll_md_exp->exp_obd->obd_name, err);
 318                 GOTO(out_md_fid, err);
 319         }
 320
 321         LASSERT(osfs->os_bsize);
 322         sb->s_blocksize = osfs->os_bsize;
 323         sb->s_blocksize_bits = log2(osfs->os_bsize);
 324         sb->s_magic = LL_SUPER_MAGIC;
 325         sb->s_maxbytes = MAX_LFS_FILESIZE;
 326         sbi->ll_namelen = osfs->os_namelen;
 327
 328         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 329             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 330                 LCONSOLE_INFO("Disabling user_xattr feature because "
 331                               "it is not supported on the server\n");
 332                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 333         }
 334
 335         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 336 #ifdef MS_POSIXACL
 337                 sb->s_flags |= MS_POSIXACL;
 338 #endif
 339                 sbi->ll_flags |= LL_SBI_ACL;
 340         } else {
 341                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 342 #ifdef MS_POSIXACL
 343                 sb->s_flags &= ~MS_POSIXACL;
 344 #endif
 345                 sbi->ll_flags &= ~LL_SBI_ACL;
 346         }
 347
 348         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 349                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 350                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 351                         LCONSOLE_INFO("client is set as remote by default.\n");
 352                 }
 353         } else {
 354                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 355                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 356                         LCONSOLE_INFO("client claims to be remote, but server "
 357                                       "rejected, forced to be local.\n");
 358                 }
 359         }
 360
 361         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 362                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 363
 364         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 365                 sbi->ll_md_brw_pages = data->ocd_brw_size >> PAGE_CACHE_SHIFT;
 366         else
 367                 sbi->ll_md_brw_pages = 1;
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 370                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 371
 372         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 373                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 374                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 375                                       "unknown maximum xattr size.\n", dt);
 376                 } else {
 377                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 378                         sbi->ll_xattr_cache_enabled = 1;
 379                 }
 380         }
 381
 382         obd = class_name2obd(dt);
 383         if (!obd) {
 384                 CERROR("DT %s: not setup or attached\n", dt);
 385                 GOTO(out_md_fid, err = -ENODEV);
 386         }
 387
 388         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 389                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 390                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 391                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 392                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 393                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 394                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 395                                   OBD_CONNECT_MAXBYTES |
 396                                   OBD_CONNECT_EINPROGRESS |
 397                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 398                                   OBD_CONNECT_LAYOUTLOCK |
 399                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_LFSCK |
 400                                   OBD_CONNECT_BULK_MBITS;
 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                         data->ocd_cksum_types = cksum_types_supported_client();
 413         }
 414
 415 #ifdef HAVE_LRU_RESIZE_SUPPORT
 416         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 417 #endif
 418         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 419                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 420
 421         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 422                "ocd_grant: %d\n", data->ocd_connect_flags,
 423                data->ocd_version, data->ocd_grant);
 424
 425         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 426         obd->obd_upcall.onu_upcall = cl_ocd_update;
 427
 428         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 429
 430         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 431                           NULL);
 432         if (err == -EBUSY) {
 433                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 434                                    "recovery, of which this client is not a "
 435                                    "part.  Please wait for recovery to "
 436                                    "complete, abort, or time out.\n", dt);
 437                 GOTO(out_md, err);
 438         } else if (err) {
 439                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 440                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 441                 GOTO(out_md, err);
 442         }
 443
 444         sbi->ll_dt_exp->exp_connect_data = *data;
 445
 446         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 447                            LUSTRE_SEQ_METADATA);
 448         if (err) {
 449                 CERROR("%s: Can't init data layer FID infrastructure, "
 450                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 451                 GOTO(out_dt, err);
 452         }
 453
 454         mutex_lock(&sbi->ll_lco.lco_lock);
 455         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 456         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 457         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 458         mutex_unlock(&sbi->ll_lco.lco_lock);
 459
 460         fid_zero(&sbi->ll_root_fid);
 461         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid);
 462         if (err) {
 463                 CERROR("cannot mds_connect: rc = %d\n", err);
 464                 GOTO(out_lock_cn_cb, err);
 465         }
 466         if (!fid_is_sane(&sbi->ll_root_fid)) {
 467                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 468                        sbi->ll_md_exp->exp_obd->obd_name,
 469                        PFID(&sbi->ll_root_fid));
 470                 GOTO(out_lock_cn_cb, err = -EINVAL);
 471         }
 472         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 473
 474         sb->s_op = &lustre_super_operations;
 475 #if THREAD_SIZE >= 8192 /*b=17630*/
 476         sb->s_export_op = &lustre_export_operations;
 477 #endif
 478
 479         /* make root inode
 480          * XXX: move this to after cbd setup? */
 481         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMODEASIZE;
 482         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 483                 valid |= OBD_MD_FLRMTPERM;
 484         else if (sbi->ll_flags & LL_SBI_ACL)
 485                 valid |= OBD_MD_FLACL;
 486
 487         OBD_ALLOC_PTR(op_data);
 488         if (op_data == NULL)
 489                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 490
 491         op_data->op_fid1 = sbi->ll_root_fid;
 492         op_data->op_mode = 0;
 493         op_data->op_valid = valid;
 494
 495         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 496
 497         OBD_FREE_PTR(op_data);
 498         if (err) {
 499                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 500                        sbi->ll_md_exp->exp_obd->obd_name, err);
 501                 GOTO(out_lock_cn_cb, err);
 502         }
 503
 504         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 505                                sbi->ll_md_exp, &lmd);
 506         if (err) {
 507                 CERROR("failed to understand root inode md: rc = %d\n", err);
 508                 ptlrpc_req_finished(request);
 509                 GOTO(out_lock_cn_cb, err);
 510         }
 511
 512         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 513         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 514                                             sbi->ll_flags & LL_SBI_32BIT_API),
 515                        &lmd);
 516         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 517         ptlrpc_req_finished(request);
 518
 519         if (IS_ERR(root)) {
 520 #ifdef CONFIG_FS_POSIX_ACL
 521                 if (lmd.posix_acl) {
 522                         posix_acl_release(lmd.posix_acl);
 523                         lmd.posix_acl = NULL;
 524                 }
 525 #endif
 526                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 527                 root = NULL;
 528                 CERROR("lustre_lite: bad iget4 for root\n");
 529                 GOTO(out_root, err);
 530         }
 531
 532 #ifdef CONFIG_FS_POSIX_ACL
 533         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 534                 rct_init(&sbi->ll_rct);
 535                 et_init(&sbi->ll_et);
 536         }
 537 #endif
 538
 539         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 540         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 541                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 542                                  NULL);
 543         cl_sb_init(sb);
 544
 545         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 546                                  KEY_CACHE_SET, sizeof(*sbi->ll_cache),
 547                                  sbi->ll_cache, NULL);
 548
 549         sb->s_root = d_make_root(root);
 550         if (sb->s_root == NULL) {
 551                 CERROR("%s: can't make root dentry\n",
 552                         ll_get_fsname(sb, NULL, 0));
 553                 GOTO(out_root, err = -ENOMEM);
 554         }
 555 #ifdef HAVE_DCACHE_LOCK
 556         sb->s_root->d_op = &ll_d_ops;
 557 #endif
 558
 559         sbi->ll_sdev_orig = sb->s_dev;
 560
 561         /* We set sb->s_dev equal on all lustre clients in order to support
 562          * NFS export clustering.  NFSD requires that the FSID be the same
 563          * on all clients. */
 564         /* s_dev is also used in lt_compare() to compare two fs, but that is
 565          * only a node-local comparison. */
 566         uuid = obd_get_uuid(sbi->ll_md_exp);
 567         if (uuid != NULL)
 568                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 569
 570         if (data != NULL)
 571                 OBD_FREE_PTR(data);
 572         if (osfs != NULL)
 573                 OBD_FREE_PTR(osfs);
 574         if (proc_lustre_fs_root != NULL) {
 575                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 576                                                   dt, md);
 577                 if (err < 0) {
 578                         CERROR("%s: could not register mount in lprocfs: "
 579                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 580                         err = 0;
 581                 }
 582         }
 583
 584         RETURN(err);
 585 out_root:
 586         if (root)
 587                 iput(root);
 588 out_lock_cn_cb:
 589         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 590 out_dt:
 591         obd_disconnect(sbi->ll_dt_exp);
 592         sbi->ll_dt_exp = NULL;
 593 out_md_fid:
 594         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 595 out_md:
 596         obd_disconnect(sbi->ll_md_exp);
 597         sbi->ll_md_exp = NULL;
 598 out:
 599         if (data != NULL)
 600                 OBD_FREE_PTR(data);
 601         if (osfs != NULL)
 602                 OBD_FREE_PTR(osfs);
 603         return err;
 604 }
 605
 606 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 607 {
 608         int size, rc;
 609
 610         size = sizeof(*lmmsize);
 611         rc = obd_get_info(NULL, sbi->ll_dt_exp, sizeof(KEY_MAX_EASIZE),
 612                           KEY_MAX_EASIZE, &size, lmmsize);
 613         if (rc != 0) {
 614                 CERROR("%s: cannot get max LOV EA size: rc = %d\n",
 615                        sbi->ll_dt_exp->exp_obd->obd_name, rc);
 616                 RETURN(rc);
 617         }
 618
 619         size = sizeof(int);
 620         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 621                           KEY_MAX_EASIZE, &size, lmmsize);
 622         if (rc)
 623                 CERROR("Get max mdsize error rc %d\n", rc);
 624
 625         RETURN(rc);
 626 }
 627
 628 /**
 629  * Get the value of the default_easize parameter.
 630  *
 631  * \see client_obd::cl_default_mds_easize
 632  *
 633  * \param[in] sbi       superblock info for this filesystem
 634  * \param[out] lmmsize  pointer to storage location for value
 635  *
 636  * \retval 0            on success
 637  * \retval negative     negated errno on failure
 638  */
 639 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 640 {
 641         int size, rc;
 642
 643         size = sizeof(int);
 644         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 645                          KEY_DEFAULT_EASIZE, &size, lmmsize);
 646         if (rc)
 647                 CERROR("Get default mdsize error rc %d\n", rc);
 648
 649         RETURN(rc);
 650 }
 651
 652 /**
 653  * Set the default_easize parameter to the given value.
 654  *
 655  * \see client_obd::cl_default_mds_easize
 656  *
 657  * \param[in] sbi       superblock info for this filesystem
 658  * \param[in] lmmsize   the size to set
 659  *
 660  * \retval 0            on success
 661  * \retval negative     negated errno on failure
 662  */
 663 int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
 664 {
 665         int rc;
 666
 667         if (lmmsize < sizeof(struct lov_mds_md) ||
 668             lmmsize > OBD_MAX_DEFAULT_EA_SIZE)
 669                 return -EINVAL;
 670
 671         rc = obd_set_info_async(NULL, sbi->ll_md_exp,
 672                                 sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
 673                                 sizeof(int), &lmmsize, NULL);
 674
 675         RETURN(rc);
 676 }
 677
 678 static void ll_dump_inode(struct inode *inode)
 679 {
 680         struct ll_d_hlist_node *tmp;
 681         int dentry_count = 0;
 682
 683         LASSERT(inode != NULL);
 684
 685         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 686                 dentry_count++;
 687
 688         CERROR("%s: inode %p dump: dev=%s fid="DFID
 689                " mode=%o count=%u, %d dentries\n",
 690                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 691                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 692                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 693 }
 694
 695 void lustre_dump_dentry(struct dentry *dentry, int recur)
 696 {
 697         struct list_head *tmp;
 698         int subdirs = 0;
 699
 700         LASSERT(dentry != NULL);
 701
 702         list_for_each(tmp, &dentry->d_subdirs)
 703                 subdirs++;
 704
 705         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 706                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 707                dentry->d_name.len, dentry->d_name.name,
 708                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 709                dentry->d_parent, dentry->d_inode, ll_d_count(dentry),
 710                dentry->d_flags, dentry->d_fsdata, subdirs);
 711         if (dentry->d_inode != NULL)
 712                 ll_dump_inode(dentry->d_inode);
 713
 714         if (recur == 0)
 715                 return;
 716
 717         list_for_each(tmp, &dentry->d_subdirs) {
 718                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
 719                 lustre_dump_dentry(d, recur - 1);
 720         }
 721 }
 722
 723 static void client_common_put_super(struct super_block *sb)
 724 {
 725         struct ll_sb_info *sbi = ll_s2sbi(sb);
 726         ENTRY;
 727
 728 #ifdef CONFIG_FS_POSIX_ACL
 729         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 730                 et_fini(&sbi->ll_et);
 731                 rct_fini(&sbi->ll_rct);
 732         }
 733 #endif
 734
 735         cl_sb_fini(sb);
 736
 737         list_del(&sbi->ll_conn_chain);
 738
 739         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 740         obd_disconnect(sbi->ll_dt_exp);
 741         sbi->ll_dt_exp = NULL;
 742
 743         lprocfs_unregister_mountpoint(sbi);
 744
 745         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 746         obd_disconnect(sbi->ll_md_exp);
 747         sbi->ll_md_exp = NULL;
 748
 749         EXIT;
 750 }
 751
 752 void ll_kill_super(struct super_block *sb)
 753 {
 754         struct ll_sb_info *sbi;
 755         ENTRY;
 756
 757         /* not init sb ?*/
 758         if (!(sb->s_flags & MS_ACTIVE))
 759                 return;
 760
 761         sbi = ll_s2sbi(sb);
 762         /* we need restore s_dev from changed for clustred NFS before put_super
 763          * because new kernels have cached s_dev and change sb->s_dev in
 764          * put_super not affected real removing devices */
 765         if (sbi) {
 766                 sb->s_dev = sbi->ll_sdev_orig;
 767                 sbi->ll_umounting = 1;
 768
 769                 /* wait running statahead threads to quit */
 770                 while (atomic_read(&sbi->ll_sa_running) > 0) {
 771                         set_current_state(TASK_UNINTERRUPTIBLE);
 772                         schedule_timeout(msecs_to_jiffies(MSEC_PER_SEC >> 3));
 773                 }
 774         }
 775
 776         EXIT;
 777 }
 778
 779 static inline int ll_set_opt(const char *opt, char *data, int fl)
 780 {
 781         if (strncmp(opt, data, strlen(opt)) != 0)
 782                 return(0);
 783         else
 784                 return(fl);
 785 }
 786
 787 /* non-client-specific mount options are parsed in lmd_parse */
 788 static int ll_options(char *options, int *flags)
 789 {
 790         int tmp;
 791         char *s1 = options, *s2;
 792         ENTRY;
 793
 794         if (!options)
 795                 RETURN(0);
 796
 797         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 798
 799         while (*s1) {
 800                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 801                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 802                 if (tmp) {
 803                         *flags |= tmp;
 804                         goto next;
 805                 }
 806                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 807                 if (tmp) {
 808                         *flags |= tmp;
 809                         goto next;
 810                 }
 811                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 812                 if (tmp) {
 813                         *flags |= tmp;
 814                         goto next;
 815                 }
 816                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 817                 if (tmp) {
 818                         *flags &= ~tmp;
 819                         goto next;
 820                 }
 821                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 822                 if (tmp) {
 823                         *flags |= tmp;
 824                         goto next;
 825                 }
 826                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 827                 if (tmp) {
 828                         *flags &= ~tmp;
 829                         goto next;
 830                 }
 831                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 832                 if (tmp) {
 833                         *flags |= tmp;
 834                         goto next;
 835                 }
 836                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 837                 if (tmp) {
 838                         *flags |= tmp;
 839                         goto next;
 840                 }
 841                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 842                 if (tmp) {
 843                         *flags &= ~tmp;
 844                         goto next;
 845                 }
 846
 847                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 848                 if (tmp) {
 849                         *flags |= tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 853                 if (tmp) {
 854                         *flags &= ~tmp;
 855                         goto next;
 856                 }
 857                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 858                 if (tmp) {
 859                         *flags |= tmp;
 860                         goto next;
 861                 }
 862                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 863                 if (tmp) {
 864                         *flags &= ~tmp;
 865                         goto next;
 866                 }
 867                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 868                 if (tmp) {
 869                         *flags |= tmp;
 870                         goto next;
 871                 }
 872                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 873                 if (tmp) {
 874                         *flags &= ~tmp;
 875                         goto next;
 876                 }
 877                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 878                 if (tmp) {
 879                         *flags |= tmp;
 880                         goto next;
 881                 }
 882                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 883                 if (tmp) {
 884                         *flags |= tmp;
 885                         goto next;
 886                 }
 887                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 888                 if (tmp) {
 889                         *flags &= ~tmp;
 890                         goto next;
 891                 }
 892                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 893                                    s1);
 894                 RETURN(-EINVAL);
 895
 896 next:
 897                 /* Find next opt */
 898                 s2 = strchr(s1, ',');
 899                 if (s2 == NULL)
 900                         break;
 901                 s1 = s2 + 1;
 902         }
 903         RETURN(0);
 904 }
 905
 906 void ll_lli_init(struct ll_inode_info *lli)
 907 {
 908         lli->lli_inode_magic = LLI_INODE_MAGIC;
 909         lli->lli_flags = 0;
 910         spin_lock_init(&lli->lli_lock);
 911         lli->lli_posix_acl = NULL;
 912         lli->lli_remote_perms = NULL;
 913         mutex_init(&lli->lli_rmtperm_mutex);
 914         /* Do not set lli_fid, it has been initialized already. */
 915         fid_zero(&lli->lli_pfid);
 916         atomic_set(&lli->lli_open_count, 0);
 917         lli->lli_rmtperm_time = 0;
 918         lli->lli_mds_read_och = NULL;
 919         lli->lli_mds_write_och = NULL;
 920         lli->lli_mds_exec_och = NULL;
 921         lli->lli_open_fd_read_count = 0;
 922         lli->lli_open_fd_write_count = 0;
 923         lli->lli_open_fd_exec_count = 0;
 924         mutex_init(&lli->lli_och_mutex);
 925         spin_lock_init(&lli->lli_agl_lock);
 926         spin_lock_init(&lli->lli_layout_lock);
 927         ll_layout_version_set(lli, CL_LAYOUT_GEN_NONE);
 928         lli->lli_clob = NULL;
 929
 930         init_rwsem(&lli->lli_xattrs_list_rwsem);
 931         mutex_init(&lli->lli_xattrs_enq_lock);
 932
 933         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 934         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 935                 mutex_init(&lli->lli_readdir_mutex);
 936                 lli->lli_opendir_key = NULL;
 937                 lli->lli_sai = NULL;
 938                 spin_lock_init(&lli->lli_sa_lock);
 939                 lli->lli_opendir_pid = 0;
 940                 lli->lli_sa_enabled = 0;
 941                 lli->lli_def_stripe_offset = -1;
 942         } else {
 943                 mutex_init(&lli->lli_size_mutex);
 944                 lli->lli_symlink_name = NULL;
 945                 init_rwsem(&lli->lli_trunc_sem);
 946                 range_lock_tree_init(&lli->lli_write_tree);
 947                 init_rwsem(&lli->lli_glimpse_sem);
 948                 lli->lli_glimpse_time = 0;
 949                 INIT_LIST_HEAD(&lli->lli_agl_list);
 950                 lli->lli_agl_index = 0;
 951                 lli->lli_async_rc = 0;
 952         }
 953         mutex_init(&lli->lli_layout_mutex);
 954 }
 955
 956 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 957 {
 958         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 959
 960         bdi->name = "lustre";
 961         return bdi_register(bdi, NULL, "lustre-%d",
 962                             atomic_inc_return(&ll_bdi_num));
 963 }
 964
 965 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 966 {
 967         struct lustre_profile *lprof = NULL;
 968         struct lustre_sb_info *lsi = s2lsi(sb);
 969         struct ll_sb_info *sbi;
 970         char  *dt = NULL, *md = NULL;
 971         char  *profilenm = get_profile_name(sb);
 972         struct config_llog_instance *cfg;
 973         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 974         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 975         int    err;
 976         ENTRY;
 977
 978         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 979
 980         OBD_ALLOC_PTR(cfg);
 981         if (cfg == NULL)
 982                 RETURN(-ENOMEM);
 983
 984         try_module_get(THIS_MODULE);
 985
 986         /* client additional sb info */
 987         lsi->lsi_llsbi = sbi = ll_init_sbi();
 988         if (!sbi) {
 989                 module_put(THIS_MODULE);
 990                 OBD_FREE_PTR(cfg);
 991                 RETURN(-ENOMEM);
 992         }
 993
 994         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 995         if (err)
 996                 GOTO(out_free, err);
 997
 998         err = bdi_init(&lsi->lsi_bdi);
 999         if (err)
1000                 GOTO(out_free, err);
1001         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1002 #ifdef HAVE_BDI_CAP_MAP_COPY
1003         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1004 #else
1005         lsi->lsi_bdi.capabilities = 0;
1006 #endif
1007         err = ll_bdi_register(&lsi->lsi_bdi);
1008         if (err)
1009                 GOTO(out_free, err);
1010
1011         sb->s_bdi = &lsi->lsi_bdi;
1012 #ifndef HAVE_DCACHE_LOCK
1013         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1014         sb->s_d_op = &ll_d_ops;
1015 #endif
1016
1017         /* Generate a string unique to this super, in case some joker tries
1018            to mount the same fs at two mount points.
1019            Use the address of the super itself.*/
1020         cfg->cfg_instance = sb;
1021         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1022         cfg->cfg_callback = class_config_llog_handler;
1023         /* set up client obds */
1024         err = lustre_process_log(sb, profilenm, cfg);
1025         if (err < 0)
1026                 GOTO(out_free, err);
1027
1028         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1029         lprof = class_get_profile(profilenm);
1030         if (lprof == NULL) {
1031                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1032                                    " read from the MGS.  Does that filesystem "
1033                                    "exist?\n", profilenm);
1034                 GOTO(out_free, err = -EINVAL);
1035         }
1036         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1037                lprof->lp_md, lprof->lp_dt);
1038
1039         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1040         if (!dt)
1041                 GOTO(out_free, err = -ENOMEM);
1042         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1043
1044         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1045         if (!md)
1046                 GOTO(out_free, err = -ENOMEM);
1047         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1048
1049         /* connections, registrations, sb setup */
1050         err = client_common_fill_super(sb, md, dt, mnt);
1051         if (err < 0)
1052                 GOTO(out_free, err);
1053
1054         sbi->ll_client_common_fill_super_succeeded = 1;
1055
1056 out_free:
1057         if (md)
1058                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1059         if (dt)
1060                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1061         if (err)
1062                 ll_put_super(sb);
1063         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1064                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1065
1066         OBD_FREE_PTR(cfg);
1067         RETURN(err);
1068 } /* ll_fill_super */
1069
1070 void ll_put_super(struct super_block *sb)
1071 {
1072         struct config_llog_instance cfg, params_cfg;
1073         struct obd_device *obd;
1074         struct lustre_sb_info *lsi = s2lsi(sb);
1075         struct ll_sb_info *sbi = ll_s2sbi(sb);
1076         char *profilenm = get_profile_name(sb);
1077         long ccc_count;
1078         int next, force = 1, rc = 0;
1079         ENTRY;
1080
1081         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1082
1083         cfg.cfg_instance = sb;
1084         lustre_end_log(sb, profilenm, &cfg);
1085
1086         params_cfg.cfg_instance = sb;
1087         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1088
1089         if (sbi->ll_md_exp) {
1090                 obd = class_exp2obd(sbi->ll_md_exp);
1091                 if (obd)
1092                         force = obd->obd_force;
1093         }
1094
1095         /* Wait for unstable pages to be committed to stable storage */
1096         if (force == 0) {
1097                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1098                 rc = l_wait_event(sbi->ll_cache->ccc_unstable_waitq,
1099                         atomic_long_read(&sbi->ll_cache->ccc_unstable_nr) == 0,
1100                         &lwi);
1101         }
1102
1103         ccc_count = atomic_long_read(&sbi->ll_cache->ccc_unstable_nr);
1104         if (force == 0 && rc != -EINTR)
1105                 LASSERTF(ccc_count == 0, "count: %li\n", ccc_count);
1106
1107
1108         /* We need to set force before the lov_disconnect in
1109            lustre_common_put_super, since l_d cleans up osc's as well. */
1110         if (force) {
1111                 next = 0;
1112                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1113                                                      &next)) != NULL) {
1114                         obd->obd_force = force;
1115                 }
1116         }
1117
1118         if (sbi->ll_client_common_fill_super_succeeded) {
1119                 /* Only if client_common_fill_super succeeded */
1120                 client_common_put_super(sb);
1121         }
1122
1123         next = 0;
1124         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1125                 class_manual_cleanup(obd);
1126         }
1127
1128         if (sbi->ll_flags & LL_SBI_VERBOSE)
1129                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1130
1131         if (profilenm)
1132                 class_del_profile(profilenm);
1133
1134         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1135                 bdi_destroy(&lsi->lsi_bdi);
1136                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1137         }
1138
1139         ll_free_sbi(sb);
1140         lsi->lsi_llsbi = NULL;
1141
1142         lustre_common_put_super(sb);
1143
1144         cl_env_cache_purge(~0);
1145
1146         module_put(THIS_MODULE);
1147
1148         EXIT;
1149 } /* client_put_super */
1150
1151 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1152 {
1153         struct inode *inode = NULL;
1154
1155         /* NOTE: we depend on atomic igrab() -bzzz */
1156         lock_res_and_lock(lock);
1157         if (lock->l_resource->lr_lvb_inode) {
1158                 struct ll_inode_info * lli;
1159                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1160                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1161                         inode = igrab(lock->l_resource->lr_lvb_inode);
1162                 } else {
1163                         inode = lock->l_resource->lr_lvb_inode;
1164                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1165                                          D_WARNING, lock, "lr_lvb_inode %p is "
1166                                          "bogus: magic %08x",
1167                                          lock->l_resource->lr_lvb_inode,
1168                                          lli->lli_inode_magic);
1169                         inode = NULL;
1170                 }
1171         }
1172         unlock_res_and_lock(lock);
1173         return inode;
1174 }
1175
1176 static void ll_dir_clear_lsm_md(struct inode *inode)
1177 {
1178         struct ll_inode_info *lli = ll_i2info(inode);
1179
1180         LASSERT(S_ISDIR(inode->i_mode));
1181
1182         if (lli->lli_lsm_md != NULL) {
1183                 lmv_free_memmd(lli->lli_lsm_md);
1184                 lli->lli_lsm_md = NULL;
1185         }
1186 }
1187
1188 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1189                                       const struct lu_fid *fid,
1190                                       struct lustre_md *md)
1191 {
1192         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1193         struct mdt_body         *body = md->body;
1194         struct inode            *inode;
1195         ino_t                   ino;
1196         ENTRY;
1197
1198         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1199         inode = iget_locked(sb, ino);
1200         if (inode == NULL) {
1201                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1202                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1203                 RETURN(ERR_PTR(-ENOENT));
1204         }
1205
1206         if (inode->i_state & I_NEW) {
1207                 struct ll_inode_info *lli = ll_i2info(inode);
1208                 struct lmv_stripe_md *lsm = md->lmv;
1209
1210                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1211                                 (body->mbo_mode & S_IFMT);
1212                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1213                          PFID(fid));
1214
1215                 LTIME_S(inode->i_mtime) = 0;
1216                 LTIME_S(inode->i_atime) = 0;
1217                 LTIME_S(inode->i_ctime) = 0;
1218                 inode->i_rdev = 0;
1219
1220 #ifdef HAVE_BACKING_DEV_INFO
1221                 /* initializing backing dev info. */
1222                 inode->i_mapping->backing_dev_info =
1223                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1224 #endif
1225                 inode->i_op = &ll_dir_inode_operations;
1226                 inode->i_fop = &ll_dir_operations;
1227                 lli->lli_fid = *fid;
1228                 ll_lli_init(lli);
1229
1230                 LASSERT(lsm != NULL);
1231                 /* master object FID */
1232                 lli->lli_pfid = body->mbo_fid1;
1233                 CDEBUG(D_INODE, "lli %p slave "DFID" master "DFID"\n",
1234                        lli, PFID(fid), PFID(&lli->lli_pfid));
1235                 unlock_new_inode(inode);
1236         }
1237
1238         RETURN(inode);
1239 }
1240
1241 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1242 {
1243         struct lu_fid *fid;
1244         struct lmv_stripe_md *lsm = md->lmv;
1245         int i;
1246
1247         LASSERT(lsm != NULL);
1248         /* XXX sigh, this lsm_root initialization should be in
1249          * LMV layer, but it needs ll_iget right now, so we
1250          * put this here right now. */
1251         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1252                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1253                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1254                 /* Unfortunately ll_iget will call ll_update_inode,
1255                  * where the initialization of slave inode is slightly
1256                  * different, so it reset lsm_md to NULL to avoid
1257                  * initializing lsm for slave inode. */
1258                 /* For migrating inode, master stripe and master object will
1259                  * be same, so we only need assign this inode */
1260                 if (lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION && i == 0)
1261                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1262                 else
1263                         lsm->lsm_md_oinfo[i].lmo_root =
1264                                 ll_iget_anon_dir(inode->i_sb, fid, md);
1265
1266                 if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1267                         int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1268
1269                         lsm->lsm_md_oinfo[i].lmo_root = NULL;
1270                         return rc;
1271                 }
1272         }
1273
1274         return 0;
1275 }
1276
1277 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1278                                 const struct lmv_stripe_md *lsm_md2)
1279 {
1280         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1281                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1282                lsm_md1->lsm_md_master_mdt_index ==
1283                                         lsm_md2->lsm_md_master_mdt_index &&
1284                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1285                lsm_md1->lsm_md_layout_version ==
1286                                         lsm_md2->lsm_md_layout_version &&
1287                strcmp(lsm_md1->lsm_md_pool_name,
1288                       lsm_md2->lsm_md_pool_name) == 0;
1289 }
1290
1291 static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1292 {
1293         struct ll_inode_info *lli = ll_i2info(inode);
1294         struct lmv_stripe_md *lsm = md->lmv;
1295         int     rc;
1296         ENTRY;
1297
1298         LASSERT(S_ISDIR(inode->i_mode));
1299         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1300                PFID(ll_inode2fid(inode)));
1301
1302         /* no striped information from request. */
1303         if (lsm == NULL) {
1304                 if (lli->lli_lsm_md == NULL) {
1305                         RETURN(0);
1306                 } else if (lli->lli_lsm_md->lsm_md_hash_type &
1307                                                 LMV_HASH_FLAG_MIGRATION) {
1308                         /* migration is done, the temporay MIGRATE layout has
1309                          * been removed */
1310                         CDEBUG(D_INODE, DFID" finish migration.\n",
1311                                PFID(ll_inode2fid(inode)));
1312                         lmv_free_memmd(lli->lli_lsm_md);
1313                         lli->lli_lsm_md = NULL;
1314                         RETURN(0);
1315                 } else {
1316                         /* The lustre_md from req does not include stripeEA,
1317                          * see ll_md_setattr */
1318                         RETURN(0);
1319                 }
1320         }
1321
1322         /* set the directory layout */
1323         if (lli->lli_lsm_md == NULL) {
1324                 struct cl_attr  *attr;
1325
1326                 rc = ll_init_lsm_md(inode, md);
1327                 if (rc != 0)
1328                         RETURN(rc);
1329
1330                 lli->lli_lsm_md = lsm;
1331
1332                 OBD_ALLOC_PTR(attr);
1333                 if (attr == NULL)
1334                         RETURN(-ENOMEM);
1335
1336                 /* validate the lsm */
1337                 rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr,
1338                                    ll_md_blocking_ast);
1339                 if (rc != 0) {
1340                         OBD_FREE_PTR(attr);
1341                         RETURN(rc);
1342                 }
1343
1344                 if (md->body->mbo_valid & OBD_MD_FLNLINK)
1345                         md->body->mbo_nlink = attr->cat_nlink;
1346                 if (md->body->mbo_valid & OBD_MD_FLSIZE)
1347                         md->body->mbo_size = attr->cat_size;
1348                 if (md->body->mbo_valid & OBD_MD_FLATIME)
1349                         md->body->mbo_atime = attr->cat_atime;
1350                 if (md->body->mbo_valid & OBD_MD_FLCTIME)
1351                         md->body->mbo_ctime = attr->cat_ctime;
1352                 if (md->body->mbo_valid & OBD_MD_FLMTIME)
1353                         md->body->mbo_mtime = attr->cat_mtime;
1354
1355                 OBD_FREE_PTR(attr);
1356
1357
1358                         /* set lsm_md to NULL, so the following free lustre_md
1359                  * will not free this lsm */
1360                 md->lmv = NULL;
1361                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1362                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1363                 RETURN(0);
1364         }
1365
1366         /* Compare the old and new stripe information */
1367         if (!lsm_md_eq(lli->lli_lsm_md, lsm)) {
1368                 struct lmv_stripe_md    *old_lsm = lli->lli_lsm_md;
1369                 int                     idx;
1370
1371                 CERROR("%s: inode "DFID"(%p)'s lmv layout mismatch (%p)/(%p)"
1372                        "magic:0x%x/0x%x stripe count: %d/%d master_mdt: %d/%d"
1373                        "hash_type:0x%x/0x%x layout: 0x%x/0x%x pool:%s/%s\n",
1374                        ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1375                        inode, lsm, old_lsm,
1376                        lsm->lsm_md_magic, old_lsm->lsm_md_magic,
1377                        lsm->lsm_md_stripe_count,
1378                        old_lsm->lsm_md_stripe_count,
1379                        lsm->lsm_md_master_mdt_index,
1380                        old_lsm->lsm_md_master_mdt_index,
1381                        lsm->lsm_md_hash_type, old_lsm->lsm_md_hash_type,
1382                        lsm->lsm_md_layout_version,
1383                        old_lsm->lsm_md_layout_version,
1384                        lsm->lsm_md_pool_name,
1385                        old_lsm->lsm_md_pool_name);
1386
1387                 for (idx = 0; idx < old_lsm->lsm_md_stripe_count; idx++) {
1388                         CERROR("%s: sub FIDs in old lsm idx %d, old: "DFID"\n",
1389                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1390                                PFID(&old_lsm->lsm_md_oinfo[idx].lmo_fid));
1391                 }
1392
1393                 for (idx = 0; idx < lsm->lsm_md_stripe_count; idx++) {
1394                         CERROR("%s: sub FIDs in new lsm idx %d, new: "DFID"\n",
1395                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1396                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1397                 }
1398
1399                 RETURN(-EIO);
1400         }
1401
1402         RETURN(0);
1403 }
1404
1405 void ll_clear_inode(struct inode *inode)
1406 {
1407         struct ll_inode_info *lli = ll_i2info(inode);
1408         struct ll_sb_info *sbi = ll_i2sbi(inode);
1409         ENTRY;
1410
1411         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1412                PFID(ll_inode2fid(inode)), inode);
1413
1414         if (S_ISDIR(inode->i_mode)) {
1415                 /* these should have been cleared in ll_file_release */
1416                 LASSERT(lli->lli_opendir_key == NULL);
1417                 LASSERT(lli->lli_sai == NULL);
1418                 LASSERT(lli->lli_opendir_pid == 0);
1419         }
1420
1421         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1422
1423         LASSERT(!lli->lli_open_fd_write_count);
1424         LASSERT(!lli->lli_open_fd_read_count);
1425         LASSERT(!lli->lli_open_fd_exec_count);
1426
1427         if (lli->lli_mds_write_och)
1428                 ll_md_real_close(inode, FMODE_WRITE);
1429         if (lli->lli_mds_exec_och)
1430                 ll_md_real_close(inode, FMODE_EXEC);
1431         if (lli->lli_mds_read_och)
1432                 ll_md_real_close(inode, FMODE_READ);
1433
1434         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1435                 OBD_FREE(lli->lli_symlink_name,
1436                          strlen(lli->lli_symlink_name) + 1);
1437                 lli->lli_symlink_name = NULL;
1438         }
1439
1440         ll_xattr_cache_destroy(inode);
1441
1442         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1443                 LASSERT(lli->lli_posix_acl == NULL);
1444                 if (lli->lli_remote_perms) {
1445                         free_rmtperm_hash(lli->lli_remote_perms);
1446                         lli->lli_remote_perms = NULL;
1447                 }
1448         }
1449 #ifdef CONFIG_FS_POSIX_ACL
1450         else if (lli->lli_posix_acl) {
1451                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1452                 LASSERT(lli->lli_remote_perms == NULL);
1453                 posix_acl_release(lli->lli_posix_acl);
1454                 lli->lli_posix_acl = NULL;
1455         }
1456 #endif
1457         lli->lli_inode_magic = LLI_INODE_DEAD;
1458
1459         if (S_ISDIR(inode->i_mode))
1460                 ll_dir_clear_lsm_md(inode);
1461         else if (S_ISREG(inode->i_mode) && !is_bad_inode(inode))
1462                 LASSERT(list_empty(&lli->lli_agl_list));
1463
1464         /*
1465          * XXX This has to be done before lsm is freed below, because
1466          * cl_object still uses inode lsm.
1467          */
1468         cl_inode_fini(inode);
1469
1470         EXIT;
1471 }
1472
1473 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data)
1474 {
1475         struct lustre_md md;
1476         struct inode *inode = dentry->d_inode;
1477         struct ll_sb_info *sbi = ll_i2sbi(inode);
1478         struct ptlrpc_request *request = NULL;
1479         int rc, ia_valid;
1480         ENTRY;
1481
1482         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1483                                      LUSTRE_OPC_ANY, NULL);
1484         if (IS_ERR(op_data))
1485                 RETURN(PTR_ERR(op_data));
1486
1487         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &request);
1488         if (rc) {
1489                 ptlrpc_req_finished(request);
1490                 if (rc == -ENOENT) {
1491                         clear_nlink(inode);
1492                         /* Unlinked special device node? Or just a race?
1493                          * Pretend we done everything. */
1494                         if (!S_ISREG(inode->i_mode) &&
1495                             !S_ISDIR(inode->i_mode)) {
1496                                 ia_valid = op_data->op_attr.ia_valid;
1497                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1498                                 rc = simple_setattr(dentry, &op_data->op_attr);
1499                                 op_data->op_attr.ia_valid = ia_valid;
1500                         }
1501                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1502                         CERROR("md_setattr fails: rc = %d\n", rc);
1503                 }
1504                 RETURN(rc);
1505         }
1506
1507         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1508                               sbi->ll_md_exp, &md);
1509         if (rc) {
1510                 ptlrpc_req_finished(request);
1511                 RETURN(rc);
1512         }
1513
1514         ia_valid = op_data->op_attr.ia_valid;
1515         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1516          * cache is not cleared yet. */
1517         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1518         if (S_ISREG(inode->i_mode))
1519                 mutex_lock(&inode->i_mutex);
1520         rc = simple_setattr(dentry, &op_data->op_attr);
1521         if (S_ISREG(inode->i_mode))
1522                 mutex_unlock(&inode->i_mutex);
1523         op_data->op_attr.ia_valid = ia_valid;
1524
1525         rc = ll_update_inode(inode, &md);
1526         ptlrpc_req_finished(request);
1527
1528         RETURN(rc);
1529 }
1530
1531 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1532  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1533  * keep these values until such a time that objects are allocated for it.
1534  * We do the MDS operations first, as it is checking permissions for us.
1535  * We don't to the MDS RPC if there is nothing that we want to store there,
1536  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1537  * going to do an RPC anyways.
1538  *
1539  * If we are doing a truncate, we will send the mtime and ctime updates
1540  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1541  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1542  * at the same time.
1543  *
1544  * In case of HSMimport, we only set attr on MDS.
1545  */
1546 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1547 {
1548         struct inode *inode = dentry->d_inode;
1549         struct ll_inode_info *lli = ll_i2info(inode);
1550         struct md_op_data *op_data = NULL;
1551         int rc = 0;
1552         ENTRY;
1553
1554         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1555                "valid %x, hsm_import %d\n",
1556                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1557                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1558                hsm_import);
1559
1560         if (attr->ia_valid & ATTR_SIZE) {
1561                 /* Check new size against VFS/VM file size limit and rlimit */
1562                 rc = inode_newsize_ok(inode, attr->ia_size);
1563                 if (rc)
1564                         RETURN(rc);
1565
1566                 /* The maximum Lustre file size is variable, based on the
1567                  * OST maximum object size and number of stripes.  This
1568                  * needs another check in addition to the VFS check above. */
1569                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1570                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1571                                PFID(&lli->lli_fid), attr->ia_size,
1572                                ll_file_maxbytes(inode));
1573                         RETURN(-EFBIG);
1574                 }
1575
1576                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1577         }
1578
1579         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1580         if (attr->ia_valid & TIMES_SET_FLAGS) {
1581                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1582                     !cfs_capable(CFS_CAP_FOWNER))
1583                         RETURN(-EPERM);
1584         }
1585
1586         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1587         if (attr->ia_valid & ATTR_CTIME) {
1588                 attr->ia_ctime = CFS_CURRENT_TIME;
1589                 attr->ia_valid |= ATTR_CTIME_SET;
1590         }
1591         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1592             (attr->ia_valid & ATTR_ATIME)) {
1593                 attr->ia_atime = CFS_CURRENT_TIME;
1594                 attr->ia_valid |= ATTR_ATIME_SET;
1595         }
1596         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1597             (attr->ia_valid & ATTR_MTIME)) {
1598                 attr->ia_mtime = CFS_CURRENT_TIME;
1599                 attr->ia_valid |= ATTR_MTIME_SET;
1600         }
1601
1602         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1603                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1604                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1605                        cfs_time_current_sec());
1606
1607         if (S_ISREG(inode->i_mode)) {
1608                 if (attr->ia_valid & ATTR_SIZE)
1609                         inode_dio_write_done(inode);
1610                 mutex_unlock(&inode->i_mutex);
1611         }
1612
1613         /* We always do an MDS RPC, even if we're only changing the size;
1614          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1615
1616         OBD_ALLOC_PTR(op_data);
1617         if (op_data == NULL)
1618                 GOTO(out, rc = -ENOMEM);
1619
1620         op_data->op_attr = *attr;
1621
1622         if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1623                 /* If we are changing file size, file content is
1624                  * modified, flag it. */
1625                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1626                 op_data->op_bias |= MDS_DATA_MODIFIED;
1627                 ll_file_clear_flag(lli, LLIF_DATA_MODIFIED);
1628         }
1629
1630         rc = ll_md_setattr(dentry, op_data);
1631         if (rc)
1632                 GOTO(out, rc);
1633
1634         if (!S_ISREG(inode->i_mode) || hsm_import)
1635                 GOTO(out, rc = 0);
1636
1637         if (attr->ia_valid & (ATTR_SIZE |
1638                               ATTR_ATIME | ATTR_ATIME_SET |
1639                               ATTR_MTIME | ATTR_MTIME_SET)) {
1640                 /* For truncate and utimes sending attributes to OSTs, setting
1641                  * mtime/atime to the past will be performed under PW [0:EOF]
1642                  * extent lock (new_size:EOF for truncate).  It may seem
1643                  * excessive to send mtime/atime updates to OSTs when not
1644                  * setting times to past, but it is necessary due to possible
1645                  * time de-synchronization between MDT inode and OST objects */
1646                 rc = cl_setattr_ost(lli->lli_clob, attr, 0);
1647         }
1648
1649         /* If the file was restored, it needs to set dirty flag.
1650          *
1651          * We've already sent MDS_DATA_MODIFIED flag in
1652          * ll_md_setattr() for truncate. However, the MDT refuses to
1653          * set the HS_DIRTY flag on released files, so we have to set
1654          * it again if the file has been restored. Please check how
1655          * LLIF_DATA_MODIFIED is set in vvp_io_setattr_fini().
1656          *
1657          * Please notice that if the file is not released, the previous
1658          * MDS_DATA_MODIFIED has taken effect and usually
1659          * LLIF_DATA_MODIFIED is not set(see vvp_io_setattr_fini()).
1660          * This way we can save an RPC for common open + trunc
1661          * operation. */
1662         if (ll_file_test_and_clear_flag(lli, LLIF_DATA_MODIFIED)) {
1663                 struct hsm_state_set hss = {
1664                         .hss_valid = HSS_SETMASK,
1665                         .hss_setmask = HS_DIRTY,
1666                 };
1667                 int rc2;
1668
1669                 rc2 = ll_hsm_state_set(inode, &hss);
1670                 /* truncate and write can happen at the same time, so that
1671                  * the file can be set modified even though the file is not
1672                  * restored from released state, and ll_hsm_state_set() is
1673                  * not applicable for the file, and rc2 < 0 is normal in this
1674                  * case. */
1675                 if (rc2 < 0)
1676                         CDEBUG(D_INFO, DFID "HSM set dirty failed: rc2 = %d\n",
1677                                PFID(ll_inode2fid(inode)), rc2);
1678         }
1679
1680         EXIT;
1681 out:
1682         if (op_data != NULL)
1683                 ll_finish_md_op_data(op_data);
1684
1685         if (S_ISREG(inode->i_mode)) {
1686                 mutex_lock(&inode->i_mutex);
1687                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1688                         inode_dio_wait(inode);
1689         }
1690
1691         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1692                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1693
1694         return rc;
1695 }
1696
1697 int ll_setattr(struct dentry *de, struct iattr *attr)
1698 {
1699         int mode = de->d_inode->i_mode;
1700
1701         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1702                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1703                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1704
1705         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1706                                (ATTR_SIZE|ATTR_MODE)) &&
1707             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1708              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1709               !(attr->ia_mode & S_ISGID))))
1710                 attr->ia_valid |= ATTR_FORCE;
1711
1712         if ((attr->ia_valid & ATTR_MODE) &&
1713             (mode & S_ISUID) &&
1714             !(attr->ia_mode & S_ISUID) &&
1715             !(attr->ia_valid & ATTR_KILL_SUID))
1716                 attr->ia_valid |= ATTR_KILL_SUID;
1717
1718         if ((attr->ia_valid & ATTR_MODE) &&
1719             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1720             !(attr->ia_mode & S_ISGID) &&
1721             !(attr->ia_valid & ATTR_KILL_SGID))
1722                 attr->ia_valid |= ATTR_KILL_SGID;
1723
1724         return ll_setattr_raw(de, attr, false);
1725 }
1726
1727 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1728                        __u64 max_age, __u32 flags)
1729 {
1730         struct ll_sb_info *sbi = ll_s2sbi(sb);
1731         struct obd_statfs obd_osfs;
1732         int rc;
1733         ENTRY;
1734
1735         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1736         if (rc) {
1737                 CERROR("md_statfs fails: rc = %d\n", rc);
1738                 RETURN(rc);
1739         }
1740
1741         osfs->os_type = sb->s_magic;
1742
1743         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1744                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1745
1746         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1747                 flags |= OBD_STATFS_NODELAY;
1748
1749         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1750         if (rc) {
1751                 CERROR("obd_statfs fails: rc = %d\n", rc);
1752                 RETURN(rc);
1753         }
1754
1755         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1756                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1757                obd_osfs.os_files);
1758
1759         osfs->os_bsize = obd_osfs.os_bsize;
1760         osfs->os_blocks = obd_osfs.os_blocks;
1761         osfs->os_bfree = obd_osfs.os_bfree;
1762         osfs->os_bavail = obd_osfs.os_bavail;
1763
1764         /* If we don't have as many objects free on the OST as inodes
1765          * on the MDS, we reduce the total number of inodes to
1766          * compensate, so that the "inodes in use" number is correct.
1767          */
1768         if (obd_osfs.os_ffree < osfs->os_ffree) {
1769                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1770                         obd_osfs.os_ffree;
1771                 osfs->os_ffree = obd_osfs.os_ffree;
1772         }
1773
1774         RETURN(rc);
1775 }
1776 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1777 {
1778         struct super_block *sb = de->d_sb;
1779         struct obd_statfs osfs;
1780         __u64 fsid = huge_encode_dev(sb->s_dev);
1781         int rc;
1782
1783         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1784         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1785
1786         /* Some amount of caching on the client is allowed */
1787         rc = ll_statfs_internal(sb, &osfs,
1788                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1789                                 0);
1790         if (rc)
1791                 return rc;
1792
1793         statfs_unpack(sfs, &osfs);
1794
1795         /* We need to downshift for all 32-bit kernels, because we can't
1796          * tell if the kernel is being called via sys_statfs64() or not.
1797          * Stop before overflowing f_bsize - in which case it is better
1798          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1799         if (sizeof(long) < 8) {
1800                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1801                         sfs->f_bsize <<= 1;
1802
1803                         osfs.os_blocks >>= 1;
1804                         osfs.os_bfree >>= 1;
1805                         osfs.os_bavail >>= 1;
1806                 }
1807         }
1808
1809         sfs->f_blocks = osfs.os_blocks;
1810         sfs->f_bfree = osfs.os_bfree;
1811         sfs->f_bavail = osfs.os_bavail;
1812         sfs->f_fsid.val[0] = (__u32)fsid;
1813         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1814         return 0;
1815 }
1816
1817 void ll_inode_size_lock(struct inode *inode)
1818 {
1819         struct ll_inode_info *lli;
1820
1821         LASSERT(!S_ISDIR(inode->i_mode));
1822
1823         lli = ll_i2info(inode);
1824         mutex_lock(&lli->lli_size_mutex);
1825 }
1826
1827 void ll_inode_size_unlock(struct inode *inode)
1828 {
1829         struct ll_inode_info *lli;
1830
1831         lli = ll_i2info(inode);
1832         mutex_unlock(&lli->lli_size_mutex);
1833 }
1834
1835 int ll_update_inode(struct inode *inode, struct lustre_md *md)
1836 {
1837         struct ll_inode_info *lli = ll_i2info(inode);
1838         struct mdt_body *body = md->body;
1839         struct ll_sb_info *sbi = ll_i2sbi(inode);
1840
1841         if (body->mbo_valid & OBD_MD_FLEASIZE)
1842                 cl_file_inode_init(inode, md);
1843
1844         if (S_ISDIR(inode->i_mode)) {
1845                 int     rc;
1846
1847                 rc = ll_update_lsm_md(inode, md);
1848                 if (rc != 0)
1849                         return rc;
1850         }
1851
1852         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1853                 if (body->mbo_valid & OBD_MD_FLRMTPERM)
1854                         ll_update_remote_perm(inode, md->remote_perm);
1855         }
1856 #ifdef CONFIG_FS_POSIX_ACL
1857         else if (body->mbo_valid & OBD_MD_FLACL) {
1858                 spin_lock(&lli->lli_lock);
1859                 if (lli->lli_posix_acl)
1860                         posix_acl_release(lli->lli_posix_acl);
1861                 lli->lli_posix_acl = md->posix_acl;
1862                 spin_unlock(&lli->lli_lock);
1863         }
1864 #endif
1865         inode->i_ino = cl_fid_build_ino(&body->mbo_fid1,
1866                                         sbi->ll_flags & LL_SBI_32BIT_API);
1867         inode->i_generation = cl_fid_build_gen(&body->mbo_fid1);
1868
1869         if (body->mbo_valid & OBD_MD_FLATIME) {
1870                 if (body->mbo_atime > LTIME_S(inode->i_atime))
1871                         LTIME_S(inode->i_atime) = body->mbo_atime;
1872                 lli->lli_atime = body->mbo_atime;
1873         }
1874
1875         if (body->mbo_valid & OBD_MD_FLMTIME) {
1876                 if (body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1877                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1878                                "to "LPU64"\n", inode->i_ino,
1879                                LTIME_S(inode->i_mtime), body->mbo_mtime);
1880                         LTIME_S(inode->i_mtime) = body->mbo_mtime;
1881                 }
1882                 lli->lli_mtime = body->mbo_mtime;
1883         }
1884
1885         if (body->mbo_valid & OBD_MD_FLCTIME) {
1886                 if (body->mbo_ctime > LTIME_S(inode->i_ctime))
1887                         LTIME_S(inode->i_ctime) = body->mbo_ctime;
1888                 lli->lli_ctime = body->mbo_ctime;
1889         }
1890
1891         if (body->mbo_valid & OBD_MD_FLMODE)
1892                 inode->i_mode = (inode->i_mode & S_IFMT) |
1893                                 (body->mbo_mode & ~S_IFMT);
1894
1895         if (body->mbo_valid & OBD_MD_FLTYPE)
1896                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1897                                 (body->mbo_mode & S_IFMT);
1898
1899         LASSERT(inode->i_mode != 0);
1900         if (S_ISREG(inode->i_mode))
1901                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1902                                        LL_MAX_BLKSIZE_BITS);
1903         else
1904                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1905
1906         if (body->mbo_valid & OBD_MD_FLUID)
1907                 inode->i_uid = make_kuid(&init_user_ns, body->mbo_uid);
1908         if (body->mbo_valid & OBD_MD_FLGID)
1909                 inode->i_gid = make_kgid(&init_user_ns, body->mbo_gid);
1910         if (body->mbo_valid & OBD_MD_FLFLAGS)
1911                 inode->i_flags = ll_ext_to_inode_flags(body->mbo_flags);
1912         if (body->mbo_valid & OBD_MD_FLNLINK)
1913                 set_nlink(inode, body->mbo_nlink);
1914         if (body->mbo_valid & OBD_MD_FLRDEV)
1915                 inode->i_rdev = old_decode_dev(body->mbo_rdev);
1916
1917         if (body->mbo_valid & OBD_MD_FLID) {
1918                 /* FID shouldn't be changed! */
1919                 if (fid_is_sane(&lli->lli_fid)) {
1920                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->mbo_fid1),
1921                                  "Trying to change FID "DFID
1922                                  " to the "DFID", inode "DFID"(%p)\n",
1923                                  PFID(&lli->lli_fid), PFID(&body->mbo_fid1),
1924                                  PFID(ll_inode2fid(inode)), inode);
1925                 } else {
1926                         lli->lli_fid = body->mbo_fid1;
1927                 }
1928         }
1929
1930         LASSERT(fid_seq(&lli->lli_fid) != 0);
1931
1932         if (body->mbo_valid & OBD_MD_FLSIZE) {
1933                 i_size_write(inode, body->mbo_size);
1934
1935                 CDEBUG(D_VFSTRACE, "inode="DFID", updating i_size %llu\n",
1936                        PFID(ll_inode2fid(inode)),
1937                        (unsigned long long)body->mbo_size);
1938
1939                 if (body->mbo_valid & OBD_MD_FLBLOCKS)
1940                         inode->i_blocks = body->mbo_blocks;
1941         }
1942
1943         if (body->mbo_valid & OBD_MD_TSTATE) {
1944                 /* Set LLIF_FILE_RESTORING if restore ongoing and
1945                  * clear it when done to ensure to start again
1946                  * glimpsing updated attrs
1947                  */
1948                 if (body->mbo_t_state & MS_RESTORE)
1949                         ll_file_set_flag(lli, LLIF_FILE_RESTORING);
1950                 else
1951                         ll_file_clear_flag(lli, LLIF_FILE_RESTORING);
1952         }
1953
1954         return 0;
1955 }
1956
1957 int ll_read_inode2(struct inode *inode, void *opaque)
1958 {
1959         struct lustre_md *md = opaque;
1960         struct ll_inode_info *lli = ll_i2info(inode);
1961         int     rc;
1962         ENTRY;
1963
1964         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1965                PFID(&lli->lli_fid), inode);
1966
1967         /* Core attributes from the MDS first.  This is a new inode, and
1968          * the VFS doesn't zero times in the core inode so we have to do
1969          * it ourselves.  They will be overwritten by either MDS or OST
1970          * attributes - we just need to make sure they aren't newer. */
1971         LTIME_S(inode->i_mtime) = 0;
1972         LTIME_S(inode->i_atime) = 0;
1973         LTIME_S(inode->i_ctime) = 0;
1974         inode->i_rdev = 0;
1975         rc = ll_update_inode(inode, md);
1976         if (rc != 0)
1977                 RETURN(rc);
1978
1979         /* OIDEBUG(inode); */
1980
1981 #ifdef HAVE_BACKING_DEV_INFO
1982         /* initializing backing dev info. */
1983         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1984 #endif
1985         if (S_ISREG(inode->i_mode)) {
1986                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1987                 inode->i_op = &ll_file_inode_operations;
1988                 inode->i_fop = sbi->ll_fop;
1989                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1990                 EXIT;
1991         } else if (S_ISDIR(inode->i_mode)) {
1992                 inode->i_op = &ll_dir_inode_operations;
1993                 inode->i_fop = &ll_dir_operations;
1994                 EXIT;
1995         } else if (S_ISLNK(inode->i_mode)) {
1996                 inode->i_op = &ll_fast_symlink_inode_operations;
1997                 EXIT;
1998         } else {
1999                 inode->i_op = &ll_special_inode_operations;
2000
2001                 init_special_inode(inode, inode->i_mode,
2002                                    inode->i_rdev);
2003
2004                 EXIT;
2005         }
2006
2007         return 0;
2008 }
2009
2010 void ll_delete_inode(struct inode *inode)
2011 {
2012         struct ll_inode_info *lli = ll_i2info(inode);
2013         ENTRY;
2014
2015         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2016                 /* It is last chance to write out dirty pages,
2017                  * otherwise we may lose data while umount */
2018                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_LOCAL, 1);
2019
2020         truncate_inode_pages_final(&inode->i_data);
2021
2022         LASSERTF(inode->i_data.nrpages == 0, "inode="DFID"(%p) nrpages=%lu, "
2023                  "see https://jira.hpdd.intel.com/browse/LU-118\n",
2024                  PFID(ll_inode2fid(inode)), inode, inode->i_data.nrpages);
2025
2026 #ifdef HAVE_SBOPS_EVICT_INODE
2027         ll_clear_inode(inode);
2028 #endif
2029         clear_inode(inode);
2030
2031         EXIT;
2032 }
2033
2034 int ll_iocontrol(struct inode *inode, struct file *file,
2035                  unsigned int cmd, unsigned long arg)
2036 {
2037         struct ll_sb_info *sbi = ll_i2sbi(inode);
2038         struct ptlrpc_request *req = NULL;
2039         int rc, flags = 0;
2040         ENTRY;
2041
2042         switch(cmd) {
2043         case FSFILT_IOC_GETFLAGS: {
2044                 struct mdt_body *body;
2045                 struct md_op_data *op_data;
2046
2047                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2048                                              0, 0, LUSTRE_OPC_ANY,
2049                                              NULL);
2050                 if (IS_ERR(op_data))
2051                         RETURN(PTR_ERR(op_data));
2052
2053                 op_data->op_valid = OBD_MD_FLFLAGS;
2054                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2055                 ll_finish_md_op_data(op_data);
2056                 if (rc) {
2057                         CERROR("%s: failure inode "DFID": rc = %d\n",
2058                                sbi->ll_md_exp->exp_obd->obd_name,
2059                                PFID(ll_inode2fid(inode)), rc);
2060                         RETURN(-abs(rc));
2061                 }
2062
2063                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2064
2065                 flags = body->mbo_flags;
2066
2067                 ptlrpc_req_finished(req);
2068
2069                 RETURN(put_user(flags, (int __user *)arg));
2070         }
2071         case FSFILT_IOC_SETFLAGS: {
2072                 struct iattr *attr;
2073                 struct md_op_data *op_data;
2074                 struct cl_object *obj;
2075
2076                 if (get_user(flags, (int __user *)arg))
2077                         RETURN(-EFAULT);
2078
2079                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2080                                              LUSTRE_OPC_ANY, NULL);
2081                 if (IS_ERR(op_data))
2082                         RETURN(PTR_ERR(op_data));
2083
2084                 op_data->op_attr_flags = flags;
2085                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2086                 rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, &req);
2087                 ll_finish_md_op_data(op_data);
2088                 ptlrpc_req_finished(req);
2089                 if (rc)
2090                         RETURN(rc);
2091
2092                 inode->i_flags = ll_ext_to_inode_flags(flags);
2093
2094                 obj = ll_i2info(inode)->lli_clob;
2095                 if (obj == NULL)
2096                         RETURN(0);
2097
2098                 OBD_ALLOC_PTR(attr);
2099                 if (attr == NULL)
2100                         RETURN(-ENOMEM);
2101
2102                 attr->ia_valid = ATTR_ATTR_FLAG;
2103                 rc = cl_setattr_ost(obj, attr, flags);
2104
2105                 OBD_FREE_PTR(attr);
2106                 RETURN(rc);
2107         }
2108         default:
2109                 RETURN(-ENOSYS);
2110         }
2111
2112         RETURN(0);
2113 }
2114
2115 int ll_flush_ctx(struct inode *inode)
2116 {
2117         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2118
2119         CDEBUG(D_SEC, "flush context for user %d\n",
2120                from_kuid(&init_user_ns, current_uid()));
2121
2122         obd_set_info_async(NULL, sbi->ll_md_exp,
2123                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2124                            0, NULL, NULL);
2125         obd_set_info_async(NULL, sbi->ll_dt_exp,
2126                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2127                            0, NULL, NULL);
2128         return 0;
2129 }
2130
2131 /* umount -f client means force down, don't save state */
2132 void ll_umount_begin(struct super_block *sb)
2133 {
2134         struct ll_sb_info *sbi = ll_s2sbi(sb);
2135         struct obd_device *obd;
2136         struct obd_ioctl_data *ioc_data;
2137         ENTRY;
2138
2139         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2140                sb->s_count, atomic_read(&sb->s_active));
2141
2142         obd = class_exp2obd(sbi->ll_md_exp);
2143         if (obd == NULL) {
2144                 CERROR("Invalid MDC connection handle "LPX64"\n",
2145                        sbi->ll_md_exp->exp_handle.h_cookie);
2146                 EXIT;
2147                 return;
2148         }
2149         obd->obd_force = 1;
2150
2151         obd = class_exp2obd(sbi->ll_dt_exp);
2152         if (obd == NULL) {
2153                 CERROR("Invalid LOV connection handle "LPX64"\n",
2154                        sbi->ll_dt_exp->exp_handle.h_cookie);
2155                 EXIT;
2156                 return;
2157         }
2158         obd->obd_force = 1;
2159
2160         OBD_ALLOC_PTR(ioc_data);
2161         if (ioc_data) {
2162                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2163                               sizeof *ioc_data, ioc_data, NULL);
2164
2165                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2166                               sizeof *ioc_data, ioc_data, NULL);
2167
2168                 OBD_FREE_PTR(ioc_data);
2169         }
2170
2171         /* Really, we'd like to wait until there are no requests outstanding,
2172          * and then continue.  For now, we just invalidate the requests,
2173          * schedule() and sleep one second if needed, and hope.
2174          */
2175         schedule();
2176         EXIT;
2177 }
2178
2179 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2180 {
2181         struct ll_sb_info *sbi = ll_s2sbi(sb);
2182         char *profilenm = get_profile_name(sb);
2183         int err;
2184         __u32 read_only;
2185
2186         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2187                 read_only = *flags & MS_RDONLY;
2188                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2189                                          sizeof(KEY_READ_ONLY),
2190                                          KEY_READ_ONLY, sizeof(read_only),
2191                                          &read_only, NULL);
2192                 if (err) {
2193                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2194                                       profilenm, read_only ?
2195                                       "read-only" : "read-write", err);
2196                         return err;
2197                 }
2198
2199                 if (read_only)
2200                         sb->s_flags |= MS_RDONLY;
2201                 else
2202                         sb->s_flags &= ~MS_RDONLY;
2203
2204                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2205                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2206                                       read_only ?  "read-only" : "read-write");
2207         }
2208         return 0;
2209 }
2210
2211 /**
2212  * Cleanup the open handle that is cached on MDT-side.
2213  *
2214  * For open case, the client side open handling thread may hit error
2215  * after the MDT grant the open. Under such case, the client should
2216  * send close RPC to the MDT as cleanup; otherwise, the open handle
2217  * on the MDT will be leaked there until the client umount or evicted.
2218  *
2219  * In further, if someone unlinked the file, because the open handle
2220  * holds the reference on such file/object, then it will block the
2221  * subsequent threads that want to locate such object via FID.
2222  *
2223  * \param[in] sb        super block for this file-system
2224  * \param[in] open_req  pointer to the original open request
2225  */
2226 void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req)
2227 {
2228         struct mdt_body                 *body;
2229         struct md_op_data               *op_data;
2230         struct ptlrpc_request           *close_req = NULL;
2231         struct obd_export               *exp       = ll_s2sbi(sb)->ll_md_exp;
2232         ENTRY;
2233
2234         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
2235         OBD_ALLOC_PTR(op_data);
2236         if (op_data == NULL) {
2237                 CWARN("%s: cannot allocate op_data to release open handle for "
2238                       DFID"\n",
2239                       ll_get_fsname(sb, NULL, 0), PFID(&body->mbo_fid1));
2240
2241                 RETURN_EXIT;
2242         }
2243
2244         op_data->op_fid1 = body->mbo_fid1;
2245         op_data->op_handle = body->mbo_handle;
2246         op_data->op_mod_time = cfs_time_current_sec();
2247         md_close(exp, op_data, NULL, &close_req);
2248         ptlrpc_req_finished(close_req);
2249         ll_finish_md_op_data(op_data);
2250
2251         EXIT;
2252 }
2253
2254 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2255                   struct super_block *sb, struct lookup_intent *it)
2256 {
2257         struct ll_sb_info *sbi = NULL;
2258         struct lustre_md md = { NULL };
2259         int rc;
2260         ENTRY;
2261
2262         LASSERT(*inode || sb);
2263         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2264         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2265                               sbi->ll_md_exp, &md);
2266         if (rc != 0)
2267                 GOTO(cleanup, rc);
2268
2269         if (*inode) {
2270                 rc = ll_update_inode(*inode, &md);
2271                 if (rc != 0)
2272                         GOTO(out, rc);
2273         } else {
2274                 LASSERT(sb != NULL);
2275
2276                 /*
2277                  * At this point server returns to client's same fid as client
2278                  * generated for creating. So using ->fid1 is okay here.
2279                  */
2280                 LASSERT(fid_is_sane(&md.body->mbo_fid1));
2281
2282                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->mbo_fid1,
2283                                              sbi->ll_flags & LL_SBI_32BIT_API),
2284                                  &md);
2285                 if (IS_ERR(*inode)) {
2286 #ifdef CONFIG_FS_POSIX_ACL
2287                         if (md.posix_acl) {
2288                                 posix_acl_release(md.posix_acl);
2289                                 md.posix_acl = NULL;
2290                         }
2291 #endif
2292                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2293                         *inode = NULL;
2294                         CERROR("new_inode -fatal: rc %d\n", rc);
2295                         GOTO(out, rc);
2296                 }
2297         }
2298
2299         /* Handling piggyback layout lock.
2300          * Layout lock can be piggybacked by getattr and open request.
2301          * The lsm can be applied to inode only if it comes with a layout lock
2302          * otherwise correct layout may be overwritten, for example:
2303          * 1. proc1: mdt returns a lsm but not granting layout
2304          * 2. layout was changed by another client
2305          * 3. proc2: refresh layout and layout lock granted
2306          * 4. proc1: to apply a stale layout */
2307         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2308                 struct lustre_handle lockh;
2309                 struct ldlm_lock *lock;
2310
2311                 lockh.cookie = it->d.lustre.it_lock_handle;
2312                 lock = ldlm_handle2lock(&lockh);
2313                 LASSERT(lock != NULL);
2314                 if (ldlm_has_layout(lock)) {
2315                         struct cl_object_conf conf;
2316
2317                         memset(&conf, 0, sizeof(conf));
2318                         conf.coc_opc = OBJECT_CONF_SET;
2319                         conf.coc_inode = *inode;
2320                         conf.coc_lock = lock;
2321                         conf.u.coc_layout = md.layout;
2322                         (void)ll_layout_conf(*inode, &conf);
2323                 }
2324                 LDLM_LOCK_PUT(lock);
2325         }
2326
2327         GOTO(out, rc = 0);
2328
2329 out:
2330         md_free_lustre_md(sbi->ll_md_exp, &md);
2331
2332 cleanup:
2333         if (rc != 0 && it != NULL && it->it_op & IT_OPEN)
2334                 ll_open_cleanup(sb != NULL ? sb : (*inode)->i_sb, req);
2335
2336         return rc;
2337 }
2338
2339 int ll_obd_statfs(struct inode *inode, void __user *arg)
2340 {
2341         struct ll_sb_info *sbi = NULL;
2342         struct obd_export *exp;
2343         char *buf = NULL;
2344         struct obd_ioctl_data *data = NULL;
2345         __u32 type;
2346         __u32 __user flags;     /* not user, but obd_iocontrol is abused */
2347         int len = 0, rc;
2348
2349         if (!inode || !(sbi = ll_i2sbi(inode)))
2350                 GOTO(out_statfs, rc = -EINVAL);
2351
2352         rc = obd_ioctl_getdata(&buf, &len, arg);
2353         if (rc)
2354                 GOTO(out_statfs, rc);
2355
2356         data = (void*)buf;
2357         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2358             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2359                 GOTO(out_statfs, rc = -EINVAL);
2360
2361         if (data->ioc_inllen1 != sizeof(__u32) ||
2362             data->ioc_inllen2 != sizeof(__u32) ||
2363             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2364             data->ioc_plen2 != sizeof(struct obd_uuid))
2365                 GOTO(out_statfs, rc = -EINVAL);
2366
2367         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2368         if (type & LL_STATFS_LMV)
2369                 exp = sbi->ll_md_exp;
2370         else if (type & LL_STATFS_LOV)
2371                 exp = sbi->ll_dt_exp;
2372         else
2373                 GOTO(out_statfs, rc = -ENODEV);
2374
2375         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2376         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2377         if (rc)
2378                 GOTO(out_statfs, rc);
2379 out_statfs:
2380         if (buf)
2381                 obd_ioctl_freedata(buf, len);
2382         return rc;
2383 }
2384
2385 int ll_process_config(struct lustre_cfg *lcfg)
2386 {
2387         struct super_block *sb;
2388         unsigned long x;
2389         int rc = 0;
2390         char *ptr;
2391
2392         /* The instance name contains the sb: lustre-client-aacfe000 */
2393         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2394         if (!ptr || !*(++ptr))
2395                 return -EINVAL;
2396         if (sscanf(ptr, "%lx", &x) != 1)
2397                 return -EINVAL;
2398         sb = (struct super_block *)x;
2399         /* This better be a real Lustre superblock! */
2400         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2401
2402         /* Note we have not called client_common_fill_super yet, so
2403            proc fns must be able to handle that! */
2404         rc = class_process_proc_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2405                                       lcfg, sb);
2406         if (rc > 0)
2407                 rc = 0;
2408         return rc;
2409 }
2410
2411 /* this function prepares md_op_data hint for passing it down to MD stack. */
2412 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2413                                       struct inode *i1, struct inode *i2,
2414                                       const char *name, size_t namelen,
2415                                       __u32 mode, __u32 opc, void *data)
2416 {
2417         LASSERT(i1 != NULL);
2418
2419         if (name == NULL) {
2420                 /* Do not reuse namelen for something else. */
2421                 if (namelen != 0)
2422                         return ERR_PTR(-EINVAL);
2423         } else {
2424                 if (namelen > ll_i2sbi(i1)->ll_namelen)
2425                         return ERR_PTR(-ENAMETOOLONG);
2426
2427                 if (!lu_name_is_valid_2(name, namelen))
2428                         return ERR_PTR(-EINVAL);
2429         }
2430
2431         if (op_data == NULL)
2432                 OBD_ALLOC_PTR(op_data);
2433
2434         if (op_data == NULL)
2435                 return ERR_PTR(-ENOMEM);
2436
2437         ll_i2gids(op_data->op_suppgids, i1, i2);
2438         op_data->op_fid1 = *ll_inode2fid(i1);
2439         op_data->op_default_stripe_offset = -1;
2440         if (S_ISDIR(i1->i_mode)) {
2441                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2442                 if (opc == LUSTRE_OPC_MKDIR)
2443                         op_data->op_default_stripe_offset =
2444                                    ll_i2info(i1)->lli_def_stripe_offset;
2445         }
2446
2447         if (i2) {
2448                 op_data->op_fid2 = *ll_inode2fid(i2);
2449                 if (S_ISDIR(i2->i_mode))
2450                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2451         } else {
2452                 fid_zero(&op_data->op_fid2);
2453         }
2454
2455         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2456                 op_data->op_cli_flags |= CLI_HASH64;
2457
2458         if (ll_need_32bit_api(ll_i2sbi(i1)))
2459                 op_data->op_cli_flags |= CLI_API32;
2460
2461         op_data->op_name = name;
2462         op_data->op_namelen = namelen;
2463         op_data->op_mode = mode;
2464         op_data->op_mod_time = cfs_time_current_sec();
2465         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2466         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2467         op_data->op_cap = cfs_curproc_cap_pack();
2468         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2469              filename_is_volatile(name, namelen, &op_data->op_mds)) {
2470                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2471         } else {
2472                 op_data->op_mds = 0;
2473         }
2474         op_data->op_data = data;
2475
2476         return op_data;
2477 }
2478
2479 void ll_finish_md_op_data(struct md_op_data *op_data)
2480 {
2481         OBD_FREE_PTR(op_data);
2482 }
2483
2484 #ifdef HAVE_SUPEROPS_USE_DENTRY
2485 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2486 #else
2487 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2488 #endif
2489 {
2490         struct ll_sb_info *sbi;
2491
2492 #ifdef HAVE_SUPEROPS_USE_DENTRY
2493         LASSERT((seq != NULL) && (dentry != NULL));
2494         sbi = ll_s2sbi(dentry->d_sb);
2495 #else
2496         LASSERT((seq != NULL) && (vfs != NULL));
2497         sbi = ll_s2sbi(vfs->mnt_sb);
2498 #endif
2499
2500         if (sbi->ll_flags & LL_SBI_NOLCK)
2501                 seq_puts(seq, ",nolock");
2502
2503         if (sbi->ll_flags & LL_SBI_FLOCK)
2504                 seq_puts(seq, ",flock");
2505
2506         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2507                 seq_puts(seq, ",localflock");
2508
2509         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2510                 seq_puts(seq, ",user_xattr");
2511
2512         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2513                 seq_puts(seq, ",lazystatfs");
2514
2515         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2516                 seq_puts(seq, ",user_fid2path");
2517
2518         RETURN(0);
2519 }
2520
2521 /**
2522  * Get obd name by cmd, and copy out to user space
2523  */
2524 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2525 {
2526         struct ll_sb_info *sbi = ll_i2sbi(inode);
2527         struct obd_device *obd;
2528         ENTRY;
2529
2530         if (cmd == OBD_IOC_GETDTNAME)
2531                 obd = class_exp2obd(sbi->ll_dt_exp);
2532         else if (cmd == OBD_IOC_GETMDNAME)
2533                 obd = class_exp2obd(sbi->ll_md_exp);
2534         else
2535                 RETURN(-EINVAL);
2536
2537         if (!obd)
2538                 RETURN(-ENOENT);
2539
2540         if (copy_to_user((void __user *)arg, obd->obd_name,
2541                          strlen(obd->obd_name) + 1))
2542                 RETURN(-EFAULT);
2543
2544         RETURN(0);
2545 }
2546
2547 /**
2548  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2549  * fsname will be returned in this buffer; otherwise, a static buffer will be
2550  * used to store the fsname and returned to caller.
2551  */
2552 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2553 {
2554         static char fsname_static[MTI_NAME_MAXLEN];
2555         struct lustre_sb_info *lsi = s2lsi(sb);
2556         char *ptr;
2557         int len;
2558
2559         if (buf == NULL) {
2560                 /* this means the caller wants to use static buffer
2561                  * and it doesn't care about race. Usually this is
2562                  * in error reporting path */
2563                 buf = fsname_static;
2564                 buflen = sizeof(fsname_static);
2565         }
2566
2567         len = strlen(lsi->lsi_lmd->lmd_profile);
2568         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2569         if (ptr && (strcmp(ptr, "-client") == 0))
2570                 len -= 7;
2571
2572         if (unlikely(len >= buflen))
2573                 len = buflen - 1;
2574         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2575         buf[len] = '\0';
2576
2577         return buf;
2578 }
2579
2580 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2581 {
2582         char *path = NULL;
2583
2584         struct path p;
2585
2586         p.dentry = dentry;
2587         p.mnt = current->fs->root.mnt;
2588         path_get(&p);
2589         path = d_path(&p, buf, bufsize);
2590         path_put(&p);
2591         return path;
2592 }
2593
2594 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2595 {
2596         char *buf, *path = NULL;
2597         struct dentry *dentry = NULL;
2598         struct inode *inode = page->mapping->host;
2599
2600         /* this can be called inside spin lock so use GFP_ATOMIC. */
2601         buf = (char *)__get_free_page(GFP_ATOMIC);
2602         if (buf != NULL) {
2603                 dentry = d_find_alias(page->mapping->host);
2604                 if (dentry != NULL)
2605                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2606         }
2607
2608         CDEBUG(D_WARNING,
2609                "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2610                "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2611                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2612                PFID(ll_inode2fid(inode)),
2613                (path && !IS_ERR(path)) ? path : "", ioret);
2614
2615         if (dentry != NULL)
2616                 dput(dentry);
2617
2618         if (buf != NULL)
2619                 free_page((unsigned long)buf);
2620 }
2621
2622 ssize_t ll_copy_user_md(const struct lov_user_md __user *md,
2623                         struct lov_user_md **kbuf)
2624 {
2625         struct lov_user_md      lum;
2626         ssize_t                 lum_size;
2627         ENTRY;
2628
2629         if (copy_from_user(&lum, md, sizeof(lum)))
2630                 RETURN(-EFAULT);
2631
2632         lum_size = ll_lov_user_md_size(&lum);
2633         if (lum_size < 0)
2634                 RETURN(lum_size);
2635
2636         OBD_ALLOC(*kbuf, lum_size);
2637         if (*kbuf == NULL)
2638                 RETURN(-ENOMEM);
2639
2640         if (copy_from_user(*kbuf, md, lum_size) != 0) {
2641                 OBD_FREE(*kbuf, lum_size);
2642                 RETURN(-EFAULT);
2643         }
2644
2645         RETURN(lum_size);
2646 }
2647
2648 /*
2649  * Compute llite root squash state after a change of root squash
2650  * configuration setting or add/remove of a lnet nid
2651  */
2652 void ll_compute_rootsquash_state(struct ll_sb_info *sbi)
2653 {
2654         struct root_squash_info *squash = &sbi->ll_squash;
2655         int i;
2656         bool matched;
2657         lnet_process_id_t id;
2658
2659         /* Update norootsquash flag */
2660         down_write(&squash->rsi_sem);
2661         if (list_empty(&squash->rsi_nosquash_nids))
2662                 sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2663         else {
2664                 /* Do not apply root squash as soon as one of our NIDs is
2665                  * in the nosquash_nids list */
2666                 matched = false;
2667                 i = 0;
2668                 while (LNetGetId(i++, &id) != -ENOENT) {
2669                         if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
2670                                 continue;
2671                         if (cfs_match_nid(id.nid, &squash->rsi_nosquash_nids)) {
2672                                 matched = true;
2673                                 break;
2674                         }
2675                 }
2676                 if (matched)
2677                         sbi->ll_flags |= LL_SBI_NOROOTSQUASH;
2678                 else
2679                         sbi->ll_flags &= ~LL_SBI_NOROOTSQUASH;
2680         }
2681         up_write(&squash->rsi_sem);
2682 }
2683
2684 /**
2685  * Parse linkea content to extract information about a given hardlink
2686  *
2687  * \param[in]   ldata      - Initialized linkea data
2688  * \param[in]   linkno     - Link identifier
2689  * \param[out]  parent_fid - The entry's parent FID
2690  * \param[out]  ln         - Entry name destination buffer
2691  *
2692  * \retval 0 on success
2693  * \retval Appropriate negative error code on failure
2694  */
2695 static int ll_linkea_decode(struct linkea_data *ldata, unsigned int linkno,
2696                             struct lu_fid *parent_fid, struct lu_name *ln)
2697 {
2698         unsigned int    idx;
2699         int             rc;
2700         ENTRY;
2701
2702         rc = linkea_init(ldata);
2703         if (rc < 0)
2704                 RETURN(rc);
2705
2706         if (linkno >= ldata->ld_leh->leh_reccount)
2707                 /* beyond last link */
2708                 RETURN(-ENODATA);
2709
2710         linkea_first_entry(ldata);
2711         for (idx = 0; ldata->ld_lee != NULL; idx++) {
2712                 linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, ln,
2713                                     parent_fid);
2714                 if (idx == linkno)
2715                         break;
2716
2717                 linkea_next_entry(ldata);
2718         }
2719
2720         if (idx < linkno)
2721                 RETURN(-ENODATA);
2722
2723         RETURN(0);
2724 }
2725
2726 /**
2727  * Get parent FID and name of an identified link. Operation is performed for
2728  * a given link number, letting the caller iterate over linkno to list one or
2729  * all links of an entry.
2730  *
2731  * \param[in]     file - File descriptor against which to perform the operation
2732  * \param[in,out] arg  - User-filled structure containing the linkno to operate
2733  *                       on and the available size. It is eventually filled with
2734  *                       the requested information or left untouched on error
2735  *
2736  * \retval - 0 on success
2737  * \retval - Appropriate negative error code on failure
2738  */
2739 int ll_getparent(struct file *file, struct getparent __user *arg)
2740 {
2741         struct dentry           *dentry = file->f_path.dentry;
2742         struct inode            *inode = dentry->d_inode;
2743         struct linkea_data      *ldata;
2744         struct lu_buf            buf = LU_BUF_NULL;
2745         struct lu_name           ln;
2746         struct lu_fid            parent_fid;
2747         __u32                    linkno;
2748         __u32                    name_size;
2749         int                      rc;
2750
2751         ENTRY;
2752
2753         if (!cfs_capable(CFS_CAP_DAC_READ_SEARCH) &&
2754             !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH))
2755                 RETURN(-EPERM);
2756
2757         if (get_user(name_size, &arg->gp_name_size))
2758                 RETURN(-EFAULT);
2759
2760         if (get_user(linkno, &arg->gp_linkno))
2761                 RETURN(-EFAULT);
2762
2763         if (name_size > PATH_MAX)
2764                 RETURN(-EINVAL);
2765
2766         OBD_ALLOC(ldata, sizeof(*ldata));
2767         if (ldata == NULL)
2768                 RETURN(-ENOMEM);
2769
2770         rc = linkea_data_new(ldata, &buf);
2771         if (rc < 0)
2772                 GOTO(ldata_free, rc);
2773
2774         rc = ll_getxattr(dentry, XATTR_NAME_LINK, buf.lb_buf, buf.lb_len);
2775         if (rc < 0)
2776                 GOTO(lb_free, rc);
2777
2778         rc = ll_linkea_decode(ldata, linkno, &parent_fid, &ln);
2779         if (rc < 0)
2780                 GOTO(lb_free, rc);
2781
2782         if (ln.ln_namelen >= name_size)
2783                 GOTO(lb_free, rc = -EOVERFLOW);
2784
2785         if (copy_to_user(&arg->gp_fid, &parent_fid, sizeof(arg->gp_fid)))
2786                 GOTO(lb_free, rc = -EFAULT);
2787
2788         if (copy_to_user(&arg->gp_name, ln.ln_name, ln.ln_namelen))
2789                 GOTO(lb_free, rc = -EFAULT);
2790
2791         if (put_user('\0', arg->gp_name + ln.ln_namelen))
2792                 GOTO(lb_free, rc = -EFAULT);
2793
2794 lb_free:
2795         lu_buf_free(&buf);
2796 ldata_free:
2797         OBD_FREE(ldata, sizeof(*ldata));
2798
2799         RETURN(rc);
2800 }