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, 2013, 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/types.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47
  48 #include <lustre_lite.h>
  49 #include <lustre_ha.h>
  50 #include <lustre_dlm.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_disk.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55 #include <cl_object.h>
  56 #include <obd_cksum.h>
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60
  61 CFS_LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82         ENTRY;
  83
  84         OBD_ALLOC(sbi, sizeof(*sbi));
  85         if (!sbi)
  86                 RETURN(NULL);
  87
  88         spin_lock_init(&sbi->ll_lock);
  89         mutex_init(&sbi->ll_lco.lco_lock);
  90         spin_lock_init(&sbi->ll_pp_extent_lock);
  91         spin_lock_init(&sbi->ll_process_lock);
  92         sbi->ll_rw_stats_on = 0;
  93
  94         si_meminfo(&si);
  95         pages = si.totalram - si.totalhigh;
  96         lru_page_max = pages / 2;
  97
  98         /* initialize ll_cache data */
  99         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 100         sbi->ll_cache.ccc_lru_max = lru_page_max;
 101         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 102         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 103         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 104
 105         cfs_atomic_set(&sbi->ll_cache.ccc_unstable_nr, 0);
 106         init_waitqueue_head(&sbi->ll_cache.ccc_unstable_waitq);
 107
 108         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 109                                            SBI_DEFAULT_READAHEAD_MAX);
 110         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 111         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 112                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 113         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 114         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 115
 116         ll_generate_random_uuid(uuid);
 117         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 118         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 119
 120         spin_lock(&ll_sb_lock);
 121         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 122         spin_unlock(&ll_sb_lock);
 123
 124         sbi->ll_flags |= LL_SBI_VERBOSE;
 125 #ifdef ENABLE_CHECKSUM
 126         sbi->ll_flags |= LL_SBI_CHECKSUM;
 127 #endif
 128
 129 #ifdef HAVE_LRU_RESIZE_SUPPORT
 130         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 131 #endif
 132
 133         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 134                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 135                                pp_r_hist.oh_lock);
 136                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 137                                pp_w_hist.oh_lock);
 138         }
 139
 140         /* metadata statahead is enabled by default */
 141         sbi->ll_sa_max = LL_SA_RPC_DEF;
 142         cfs_atomic_set(&sbi->ll_sa_total, 0);
 143         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 144         cfs_atomic_set(&sbi->ll_agl_total, 0);
 145         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 146
 147         RETURN(sbi);
 148 }
 149
 150 void ll_free_sbi(struct super_block *sb)
 151 {
 152         struct ll_sb_info *sbi = ll_s2sbi(sb);
 153         ENTRY;
 154
 155         if (sbi != NULL) {
 156                 spin_lock(&ll_sb_lock);
 157                 cfs_list_del(&sbi->ll_list);
 158                 spin_unlock(&ll_sb_lock);
 159                 OBD_FREE(sbi, sizeof(*sbi));
 160         }
 161         EXIT;
 162 }
 163
 164 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 165                                     struct vfsmount *mnt)
 166 {
 167         struct inode *root = 0;
 168         struct ll_sb_info *sbi = ll_s2sbi(sb);
 169         struct obd_device *obd;
 170         struct obd_capa *oc = NULL;
 171         struct obd_statfs *osfs = NULL;
 172         struct ptlrpc_request *request = NULL;
 173         struct obd_connect_data *data = NULL;
 174         struct obd_uuid *uuid;
 175         struct md_op_data *op_data;
 176         struct lustre_md lmd;
 177         obd_valid valid;
 178         int size, err, checksum;
 179         ENTRY;
 180
 181         obd = class_name2obd(md);
 182         if (!obd) {
 183                 CERROR("MD %s: not setup or attached\n", md);
 184                 RETURN(-EINVAL);
 185         }
 186
 187         OBD_ALLOC_PTR(data);
 188         if (data == NULL)
 189                 RETURN(-ENOMEM);
 190
 191         OBD_ALLOC_PTR(osfs);
 192         if (osfs == NULL) {
 193                 OBD_FREE_PTR(data);
 194                 RETURN(-ENOMEM);
 195         }
 196
 197         /* indicate the features supported by this client */
 198         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 199                                   OBD_CONNECT_ATTRFID  |
 200                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 201                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 202                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 203                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 204                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 205                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 206                                   OBD_CONNECT_EINPROGRESS |
 207                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 208                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 209                                   OBD_CONNECT_MAX_EASIZE |
 210                                   OBD_CONNECT_FLOCK_DEAD |
 211                                   OBD_CONNECT_DISP_STRIPE;
 212
 213         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 214                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 215
 216 #ifdef HAVE_LRU_RESIZE_SUPPORT
 217         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 218                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 219 #endif
 220 #ifdef CONFIG_FS_POSIX_ACL
 221         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 222 #endif
 223
 224         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 225                 /* flag mdc connection as lightweight, only used for test
 226                  * purpose, use with care */
 227                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 228
 229         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 230         data->ocd_version = LUSTRE_VERSION_CODE;
 231
 232         if (sb->s_flags & MS_RDONLY)
 233                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 234         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 235                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 236
 237 #ifdef HAVE_MS_FLOCK_LOCK
 238         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 239         sb->s_flags |= MS_FLOCK_LOCK;
 240 #endif
 241 #ifdef MS_HAS_NEW_AOPS
 242         sb->s_flags |= MS_HAS_NEW_AOPS;
 243 #endif
 244
 245         if (sbi->ll_flags & LL_SBI_FLOCK)
 246                 sbi->ll_fop = &ll_file_operations_flock;
 247         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 248                 sbi->ll_fop = &ll_file_operations;
 249         else
 250                 sbi->ll_fop = &ll_file_operations_noflock;
 251
 252         /* real client */
 253         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 254         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 255                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 256
 257         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 258
 259         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 260         if (err == -EBUSY) {
 261                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 262                                    "recovery, of which this client is not a "
 263                                    "part. Please wait for recovery to complete,"
 264                                    " abort, or time out.\n", md);
 265                 GOTO(out, err);
 266         } else if (err) {
 267                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 268                 GOTO(out, err);
 269         }
 270
 271         sbi->ll_md_exp->exp_connect_data = *data;
 272
 273         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 274                            LUSTRE_SEQ_METADATA);
 275         if (err) {
 276                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 277                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 278                 GOTO(out_md, err);
 279         }
 280
 281         /* For mount, we only need fs info from MDT0, and also in DNE, it
 282          * can make sure the client can be mounted as long as MDT0 is
 283          * avaible */
 284         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 285                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 286                         OBD_STATFS_FOR_MDT0);
 287         if (err)
 288                 GOTO(out_md_fid, err);
 289
 290         /* This needs to be after statfs to ensure connect has finished.
 291          * Note that "data" does NOT contain the valid connect reply.
 292          * If connecting to a 1.8 server there will be no LMV device, so
 293          * we can access the MDC export directly and exp_connect_flags will
 294          * be non-zero, but if accessing an upgraded 2.1 server it will
 295          * have the correct flags filled in.
 296          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 297         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 298         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 299             valid != CLIENT_CONNECT_MDT_REQD) {
 300                 char *buf;
 301
 302                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 303                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 304                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 305                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 306                                    "feature(s) needed for correct operation "
 307                                    "of this client (%s). Please upgrade "
 308                                    "server or downgrade client.\n",
 309                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 310                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 311                 GOTO(out_md_fid, err = -EPROTO);
 312         }
 313
 314         size = sizeof(*data);
 315         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 316                            KEY_CONN_DATA,  &size, data, NULL);
 317         if (err) {
 318                 CERROR("%s: Get connect data failed: rc = %d\n",
 319                        sbi->ll_md_exp->exp_obd->obd_name, err);
 320                 GOTO(out_md_fid, err);
 321         }
 322
 323         LASSERT(osfs->os_bsize);
 324         sb->s_blocksize = osfs->os_bsize;
 325         sb->s_blocksize_bits = log2(osfs->os_bsize);
 326         sb->s_magic = LL_SUPER_MAGIC;
 327         sb->s_maxbytes = MAX_LFS_FILESIZE;
 328         sbi->ll_namelen = osfs->os_namelen;
 329         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 330
 331         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 332             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 333                 LCONSOLE_INFO("Disabling user_xattr feature because "
 334                               "it is not supported on the server\n");
 335                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 336         }
 337
 338         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 339 #ifdef MS_POSIXACL
 340                 sb->s_flags |= MS_POSIXACL;
 341 #endif
 342                 sbi->ll_flags |= LL_SBI_ACL;
 343         } else {
 344                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 345 #ifdef MS_POSIXACL
 346                 sb->s_flags &= ~MS_POSIXACL;
 347 #endif
 348                 sbi->ll_flags &= ~LL_SBI_ACL;
 349         }
 350
 351         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 352                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 353                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 354                         LCONSOLE_INFO("client is set as remote by default.\n");
 355                 }
 356         } else {
 357                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 358                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 359                         LCONSOLE_INFO("client claims to be remote, but server "
 360                                       "rejected, forced to be local.\n");
 361                 }
 362         }
 363
 364         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 365                 LCONSOLE_INFO("client enabled MDS capability!\n");
 366                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 367         }
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 370                 LCONSOLE_INFO("client enabled OSS capability!\n");
 371                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 372         }
 373
 374         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 375                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 378                 sbi->ll_md_brw_size = data->ocd_brw_size;
 379         else
 380                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK)
 383                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 384
 385         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 386                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 387                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 388                                       "unknown maximum xattr size.\n", dt);
 389                 } else {
 390                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 391                         sbi->ll_xattr_cache_enabled = 1;
 392                 }
 393         }
 394
 395         obd = class_name2obd(dt);
 396         if (!obd) {
 397                 CERROR("DT %s: not setup or attached\n", dt);
 398                 GOTO(out_md_fid, err = -ENODEV);
 399         }
 400
 401         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 402                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 403                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 404                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 405                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 406                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 407                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 408                                   OBD_CONNECT_MAXBYTES |
 409                                   OBD_CONNECT_EINPROGRESS |
 410                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 411                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 412
 413         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 414                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 415
 416         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 417                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 418                  * disabled by default, because it can still be enabled on the
 419                  * fly via /proc. As a consequence, we still need to come to an
 420                  * agreement on the supported algorithms at connect time */
 421                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 422
 423                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 424                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 425                 else
 426                         data->ocd_cksum_types = cksum_types_supported_client();
 427         }
 428
 429 #ifdef HAVE_LRU_RESIZE_SUPPORT
 430         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 431 #endif
 432         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 433                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 434
 435         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 436                "ocd_grant: %d\n", data->ocd_connect_flags,
 437                data->ocd_version, data->ocd_grant);
 438
 439         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 440         obd->obd_upcall.onu_upcall = cl_ocd_update;
 441
 442         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 443
 444         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 445                           NULL);
 446         if (err == -EBUSY) {
 447                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 448                                    "recovery, of which this client is not a "
 449                                    "part.  Please wait for recovery to "
 450                                    "complete, abort, or time out.\n", dt);
 451                 GOTO(out_md, err);
 452         } else if (err) {
 453                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 454                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 455                 GOTO(out_md, err);
 456         }
 457
 458         sbi->ll_dt_exp->exp_connect_data = *data;
 459
 460         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 461                            LUSTRE_SEQ_METADATA);
 462         if (err) {
 463                 CERROR("%s: Can't init data layer FID infrastructure, "
 464                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 465                 GOTO(out_dt, err);
 466         }
 467
 468         mutex_lock(&sbi->ll_lco.lco_lock);
 469         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 470         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 471         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 472         mutex_unlock(&sbi->ll_lco.lco_lock);
 473
 474         fid_zero(&sbi->ll_root_fid);
 475         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 476         if (err) {
 477                 CERROR("cannot mds_connect: rc = %d\n", err);
 478                 GOTO(out_lock_cn_cb, err);
 479         }
 480         if (!fid_is_sane(&sbi->ll_root_fid)) {
 481                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 482                        sbi->ll_md_exp->exp_obd->obd_name,
 483                        PFID(&sbi->ll_root_fid));
 484                 GOTO(out_lock_cn_cb, err = -EINVAL);
 485         }
 486         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 487
 488         sb->s_op = &lustre_super_operations;
 489 #if THREAD_SIZE >= 8192 /*b=17630*/
 490         sb->s_export_op = &lustre_export_operations;
 491 #endif
 492
 493         /* make root inode
 494          * XXX: move this to after cbd setup? */
 495         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA |
 496                 OBD_MD_FLMODEASIZE;
 497         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 498                 valid |= OBD_MD_FLRMTPERM;
 499         else if (sbi->ll_flags & LL_SBI_ACL)
 500                 valid |= OBD_MD_FLACL;
 501
 502         OBD_ALLOC_PTR(op_data);
 503         if (op_data == NULL)
 504                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 505
 506         op_data->op_fid1 = sbi->ll_root_fid;
 507         op_data->op_mode = 0;
 508         op_data->op_capa1 = oc;
 509         op_data->op_valid = valid;
 510
 511         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 512         if (oc)
 513                 capa_put(oc);
 514         OBD_FREE_PTR(op_data);
 515         if (err) {
 516                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 517                        sbi->ll_md_exp->exp_obd->obd_name, err);
 518                 GOTO(out_lock_cn_cb, err);
 519         }
 520
 521         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 522                                sbi->ll_md_exp, &lmd);
 523         if (err) {
 524                 CERROR("failed to understand root inode md: rc = %d\n", err);
 525                 ptlrpc_req_finished(request);
 526                 GOTO(out_lock_cn_cb, err);
 527         }
 528
 529         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 530         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 531                                             sbi->ll_flags & LL_SBI_32BIT_API),
 532                        &lmd);
 533         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 534         ptlrpc_req_finished(request);
 535
 536         if (root == NULL || IS_ERR(root)) {
 537                 if (lmd.lsm)
 538                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 539 #ifdef CONFIG_FS_POSIX_ACL
 540                 if (lmd.posix_acl) {
 541                         posix_acl_release(lmd.posix_acl);
 542                         lmd.posix_acl = NULL;
 543                 }
 544 #endif
 545                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 546                 root = NULL;
 547                 CERROR("lustre_lite: bad iget4 for root\n");
 548                 GOTO(out_root, err);
 549         }
 550
 551         err = ll_close_thread_start(&sbi->ll_lcq);
 552         if (err) {
 553                 CERROR("cannot start close thread: rc %d\n", err);
 554                 GOTO(out_root, err);
 555         }
 556
 557 #ifdef CONFIG_FS_POSIX_ACL
 558         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 559                 rct_init(&sbi->ll_rct);
 560                 et_init(&sbi->ll_et);
 561         }
 562 #endif
 563
 564         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 565         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 566                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 567                                  NULL);
 568         cl_sb_init(sb);
 569
 570         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 571                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 572                                  &sbi->ll_cache, NULL);
 573
 574         sb->s_root = d_make_root(root);
 575         if (sb->s_root == NULL) {
 576                 CERROR("%s: can't make root dentry\n",
 577                         ll_get_fsname(sb, NULL, 0));
 578                 GOTO(out_root, err = -ENOMEM);
 579         }
 580 #ifdef HAVE_DCACHE_LOCK
 581         sb->s_root->d_op = &ll_d_ops;
 582 #endif
 583
 584         sbi->ll_sdev_orig = sb->s_dev;
 585
 586         /* We set sb->s_dev equal on all lustre clients in order to support
 587          * NFS export clustering.  NFSD requires that the FSID be the same
 588          * on all clients. */
 589         /* s_dev is also used in lt_compare() to compare two fs, but that is
 590          * only a node-local comparison. */
 591         uuid = obd_get_uuid(sbi->ll_md_exp);
 592         if (uuid != NULL)
 593                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 594
 595         if (data != NULL)
 596                 OBD_FREE_PTR(data);
 597         if (osfs != NULL)
 598                 OBD_FREE_PTR(osfs);
 599         if (proc_lustre_fs_root != NULL) {
 600                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 601                                                   dt, md);
 602                 if (err < 0) {
 603                         CERROR("%s: could not register mount in lprocfs: "
 604                                "rc = %d\n", ll_get_fsname(sb, NULL, 0), err);
 605                         err = 0;
 606                 }
 607         }
 608
 609         RETURN(err);
 610 out_root:
 611         if (root)
 612                 iput(root);
 613 out_lock_cn_cb:
 614         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 615 out_dt:
 616         obd_disconnect(sbi->ll_dt_exp);
 617         sbi->ll_dt_exp = NULL;
 618         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 619         obd_zombie_barrier();
 620 out_md_fid:
 621         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 622 out_md:
 623         obd_disconnect(sbi->ll_md_exp);
 624         sbi->ll_md_exp = NULL;
 625 out:
 626         if (data != NULL)
 627                 OBD_FREE_PTR(data);
 628         if (osfs != NULL)
 629                 OBD_FREE_PTR(osfs);
 630         return err;
 631 }
 632
 633 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 634 {
 635         int size, rc;
 636
 637         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 638         size = sizeof(int);
 639         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 640                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 641         if (rc)
 642                 CERROR("Get max mdsize error rc %d \n", rc);
 643
 644         RETURN(rc);
 645 }
 646
 647 void ll_dump_inode(struct inode *inode)
 648 {
 649         struct ll_d_hlist_node *tmp;
 650         int dentry_count = 0;
 651
 652         LASSERT(inode != NULL);
 653
 654         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 655                 dentry_count++;
 656
 657         CERROR("%s: inode %p dump: dev=%s fid="DFID
 658                " mode=%o count=%u, %d dentries\n",
 659                ll_get_fsname(inode->i_sb, NULL, 0), inode,
 660                ll_i2mdexp(inode)->exp_obd->obd_name, PFID(ll_inode2fid(inode)),
 661                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 662 }
 663
 664 void lustre_dump_dentry(struct dentry *dentry, int recur)
 665 {
 666         struct list_head *tmp;
 667         int subdirs = 0;
 668
 669         LASSERT(dentry != NULL);
 670
 671         list_for_each(tmp, &dentry->d_subdirs)
 672                 subdirs++;
 673
 674         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 675                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 676                dentry->d_name.len, dentry->d_name.name,
 677                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 678                dentry->d_parent, dentry->d_inode, d_count(dentry),
 679                dentry->d_flags, dentry->d_fsdata, subdirs);
 680         if (dentry->d_inode != NULL)
 681                 ll_dump_inode(dentry->d_inode);
 682
 683         if (recur == 0)
 684                 return;
 685
 686         list_for_each(tmp, &dentry->d_subdirs) {
 687                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 688                 lustre_dump_dentry(d, recur - 1);
 689         }
 690 }
 691
 692 void client_common_put_super(struct super_block *sb)
 693 {
 694         struct ll_sb_info *sbi = ll_s2sbi(sb);
 695         ENTRY;
 696
 697 #ifdef CONFIG_FS_POSIX_ACL
 698         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 699                 et_fini(&sbi->ll_et);
 700                 rct_fini(&sbi->ll_rct);
 701         }
 702 #endif
 703
 704         ll_close_thread_shutdown(sbi->ll_lcq);
 705
 706         cl_sb_fini(sb);
 707
 708         cfs_list_del(&sbi->ll_conn_chain);
 709
 710         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 711         obd_disconnect(sbi->ll_dt_exp);
 712         sbi->ll_dt_exp = NULL;
 713         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 714          * see LU-2543. */
 715         obd_zombie_barrier();
 716
 717         lprocfs_unregister_mountpoint(sbi);
 718
 719         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 720         obd_disconnect(sbi->ll_md_exp);
 721         sbi->ll_md_exp = NULL;
 722
 723         EXIT;
 724 }
 725
 726 void ll_kill_super(struct super_block *sb)
 727 {
 728         struct ll_sb_info *sbi;
 729
 730         ENTRY;
 731
 732         /* not init sb ?*/
 733         if (!(sb->s_flags & MS_ACTIVE))
 734                 return;
 735
 736         sbi = ll_s2sbi(sb);
 737         /* we need restore s_dev from changed for clustred NFS before put_super
 738          * because new kernels have cached s_dev and change sb->s_dev in
 739          * put_super not affected real removing devices */
 740         if (sbi) {
 741                 sb->s_dev = sbi->ll_sdev_orig;
 742                 sbi->ll_umounting = 1;
 743         }
 744         EXIT;
 745 }
 746
 747 char *ll_read_opt(const char *opt, char *data)
 748 {
 749         char *value;
 750         char *retval;
 751         ENTRY;
 752
 753         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 754         if (strncmp(opt, data, strlen(opt)))
 755                 RETURN(NULL);
 756         if ((value = strchr(data, '=')) == NULL)
 757                 RETURN(NULL);
 758
 759         value++;
 760         OBD_ALLOC(retval, strlen(value) + 1);
 761         if (!retval) {
 762                 CERROR("out of memory!\n");
 763                 RETURN(NULL);
 764         }
 765
 766         memcpy(retval, value, strlen(value)+1);
 767         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 768         RETURN(retval);
 769 }
 770
 771 static inline int ll_set_opt(const char *opt, char *data, int fl)
 772 {
 773         if (strncmp(opt, data, strlen(opt)) != 0)
 774                 return(0);
 775         else
 776                 return(fl);
 777 }
 778
 779 /* non-client-specific mount options are parsed in lmd_parse */
 780 static int ll_options(char *options, int *flags)
 781 {
 782         int tmp;
 783         char *s1 = options, *s2;
 784         ENTRY;
 785
 786         if (!options)
 787                 RETURN(0);
 788
 789         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 790
 791         while (*s1) {
 792                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 793                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 794                 if (tmp) {
 795                         *flags |= tmp;
 796                         goto next;
 797                 }
 798                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 799                 if (tmp) {
 800                         *flags |= tmp;
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 804                 if (tmp) {
 805                         *flags |= tmp;
 806                         goto next;
 807                 }
 808                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 809                 if (tmp) {
 810                         *flags &= ~tmp;
 811                         goto next;
 812                 }
 813                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 814                 if (tmp) {
 815                         *flags |= tmp;
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 819                 if (tmp) {
 820                         *flags &= ~tmp;
 821                         goto next;
 822                 }
 823 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 51, 0)
 824                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 825                 if (tmp) {
 826                         /* Ignore deprecated mount option.  The client will
 827                          * always try to mount with ACL support, whether this
 828                          * is used depends on whether server supports it. */
 829                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 830                                                   "mount option 'acl'.\n");
 831                         goto next;
 832                 }
 833                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 834                 if (tmp) {
 835                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 836                                                   "mount option 'noacl'.\n");
 837                         goto next;
 838                 }
 839 #else
 840 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 841 #endif
 842                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 843                 if (tmp) {
 844                         *flags |= tmp;
 845                         goto next;
 846                 }
 847                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 848                 if (tmp) {
 849                         *flags |= tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 853                 if (tmp) {
 854                         *flags &= ~tmp;
 855                         goto next;
 856                 }
 857
 858                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 859                 if (tmp) {
 860                         *flags |= tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 864                 if (tmp) {
 865                         *flags &= ~tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 869                 if (tmp) {
 870                         *flags |= tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 874                 if (tmp) {
 875                         *flags &= ~tmp;
 876                         goto next;
 877                 }
 878                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 879                 if (tmp) {
 880                         *flags |= tmp;
 881                         goto next;
 882                 }
 883                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 884                 if (tmp) {
 885                         *flags &= ~tmp;
 886                         goto next;
 887                 }
 888                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 889                 if (tmp) {
 890                         *flags |= tmp;
 891                         goto next;
 892                 }
 893                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 894                 if (tmp) {
 895                         *flags |= tmp;
 896                         goto next;
 897                 }
 898                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 899                 if (tmp) {
 900                         *flags |= tmp;
 901                         goto next;
 902                 }
 903                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 904                 if (tmp) {
 905                         *flags &= ~tmp;
 906                         goto next;
 907                 }
 908                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 909                                    s1);
 910                 RETURN(-EINVAL);
 911
 912 next:
 913                 /* Find next opt */
 914                 s2 = strchr(s1, ',');
 915                 if (s2 == NULL)
 916                         break;
 917                 s1 = s2 + 1;
 918         }
 919         RETURN(0);
 920 }
 921
 922 void ll_lli_init(struct ll_inode_info *lli)
 923 {
 924         lli->lli_inode_magic = LLI_INODE_MAGIC;
 925         lli->lli_flags = 0;
 926         lli->lli_ioepoch = 0;
 927         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 928         spin_lock_init(&lli->lli_lock);
 929         lli->lli_posix_acl = NULL;
 930         lli->lli_remote_perms = NULL;
 931         mutex_init(&lli->lli_rmtperm_mutex);
 932         /* Do not set lli_fid, it has been initialized already. */
 933         fid_zero(&lli->lli_pfid);
 934         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 935         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 936         cfs_atomic_set(&lli->lli_open_count, 0);
 937         lli->lli_mds_capa = NULL;
 938         lli->lli_rmtperm_time = 0;
 939         lli->lli_pending_och = NULL;
 940         lli->lli_mds_read_och = NULL;
 941         lli->lli_mds_write_och = NULL;
 942         lli->lli_mds_exec_och = NULL;
 943         lli->lli_open_fd_read_count = 0;
 944         lli->lli_open_fd_write_count = 0;
 945         lli->lli_open_fd_exec_count = 0;
 946         mutex_init(&lli->lli_och_mutex);
 947         spin_lock_init(&lli->lli_agl_lock);
 948         lli->lli_has_smd = false;
 949         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 950         lli->lli_clob = NULL;
 951
 952         init_rwsem(&lli->lli_xattrs_list_rwsem);
 953         mutex_init(&lli->lli_xattrs_enq_lock);
 954
 955         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 956         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 957                 mutex_init(&lli->lli_readdir_mutex);
 958                 lli->lli_opendir_key = NULL;
 959                 lli->lli_sai = NULL;
 960                 lli->lli_def_acl = NULL;
 961                 spin_lock_init(&lli->lli_sa_lock);
 962                 lli->lli_opendir_pid = 0;
 963         } else {
 964                 sema_init(&lli->lli_size_sem, 1);
 965                 lli->lli_size_sem_owner = NULL;
 966                 lli->lli_symlink_name = NULL;
 967                 init_rwsem(&lli->lli_trunc_sem);
 968                 mutex_init(&lli->lli_write_mutex);
 969                 init_rwsem(&lli->lli_glimpse_sem);
 970                 lli->lli_glimpse_time = 0;
 971                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 972                 lli->lli_agl_index = 0;
 973                 lli->lli_async_rc = 0;
 974                 lli->lli_volatile = false;
 975         }
 976         mutex_init(&lli->lli_layout_mutex);
 977 }
 978
 979 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 980 {
 981         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 982
 983         bdi->name = "lustre";
 984         return bdi_register(bdi, NULL, "lustre-%d",
 985                             atomic_inc_return(&ll_bdi_num));
 986 }
 987
 988 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 989 {
 990         struct lustre_profile *lprof = NULL;
 991         struct lustre_sb_info *lsi = s2lsi(sb);
 992         struct ll_sb_info *sbi;
 993         char  *dt = NULL, *md = NULL;
 994         char  *profilenm = get_profile_name(sb);
 995         struct config_llog_instance *cfg;
 996         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 997         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 998         int    err;
 999         ENTRY;
1000
1001         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1002
1003         OBD_ALLOC_PTR(cfg);
1004         if (cfg == NULL)
1005                 RETURN(-ENOMEM);
1006
1007         try_module_get(THIS_MODULE);
1008
1009         /* client additional sb info */
1010         lsi->lsi_llsbi = sbi = ll_init_sbi();
1011         if (!sbi) {
1012                 module_put(THIS_MODULE);
1013                 OBD_FREE_PTR(cfg);
1014                 RETURN(-ENOMEM);
1015         }
1016
1017         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1018         if (err)
1019                 GOTO(out_free, err);
1020
1021         err = bdi_init(&lsi->lsi_bdi);
1022         if (err)
1023                 GOTO(out_free, err);
1024         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1025         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1026         err = ll_bdi_register(&lsi->lsi_bdi);
1027         if (err)
1028                 GOTO(out_free, err);
1029
1030         sb->s_bdi = &lsi->lsi_bdi;
1031 #ifndef HAVE_DCACHE_LOCK
1032         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1033         sb->s_d_op = &ll_d_ops;
1034 #endif
1035
1036         /* Generate a string unique to this super, in case some joker tries
1037            to mount the same fs at two mount points.
1038            Use the address of the super itself.*/
1039         cfg->cfg_instance = sb;
1040         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1041         cfg->cfg_callback = class_config_llog_handler;
1042         /* set up client obds */
1043         err = lustre_process_log(sb, profilenm, cfg);
1044         if (err < 0)
1045                 GOTO(out_free, err);
1046
1047         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1048         lprof = class_get_profile(profilenm);
1049         if (lprof == NULL) {
1050                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1051                                    " read from the MGS.  Does that filesystem "
1052                                    "exist?\n", profilenm);
1053                 GOTO(out_free, err = -EINVAL);
1054         }
1055         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1056                lprof->lp_md, lprof->lp_dt);
1057
1058         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1059         if (!dt)
1060                 GOTO(out_free, err = -ENOMEM);
1061         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1062
1063         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1064         if (!md)
1065                 GOTO(out_free, err = -ENOMEM);
1066         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1067
1068         /* connections, registrations, sb setup */
1069         err = client_common_fill_super(sb, md, dt, mnt);
1070
1071 out_free:
1072         if (md)
1073                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1074         if (dt)
1075                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1076         if (err)
1077                 ll_put_super(sb);
1078         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1079                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1080
1081         OBD_FREE_PTR(cfg);
1082         RETURN(err);
1083 } /* ll_fill_super */
1084
1085
1086 void lu_context_keys_dump(void);
1087
1088 void ll_put_super(struct super_block *sb)
1089 {
1090         struct config_llog_instance cfg, params_cfg;
1091         struct obd_device *obd;
1092         struct lustre_sb_info *lsi = s2lsi(sb);
1093         struct ll_sb_info *sbi = ll_s2sbi(sb);
1094         char *profilenm = get_profile_name(sb);
1095         int ccc_count, next, force = 1, rc = 0;
1096         ENTRY;
1097
1098         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1099
1100         ll_print_capa_stat(sbi);
1101
1102         cfg.cfg_instance = sb;
1103         lustre_end_log(sb, profilenm, &cfg);
1104
1105         params_cfg.cfg_instance = sb;
1106         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1107
1108         if (sbi->ll_md_exp) {
1109                 obd = class_exp2obd(sbi->ll_md_exp);
1110                 if (obd)
1111                         force = obd->obd_force;
1112         }
1113
1114         /* Wait for unstable pages to be committed to stable storage */
1115         if (force == 0) {
1116                 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
1117                 rc = l_wait_event(sbi->ll_cache.ccc_unstable_waitq,
1118                         cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr) == 0,
1119                         &lwi);
1120         }
1121
1122         ccc_count = cfs_atomic_read(&sbi->ll_cache.ccc_unstable_nr);
1123         if (force == 0 && rc != -EINTR)
1124                 LASSERTF(ccc_count == 0, "count: %i\n", ccc_count);
1125
1126
1127         /* We need to set force before the lov_disconnect in
1128            lustre_common_put_super, since l_d cleans up osc's as well. */
1129         if (force) {
1130                 next = 0;
1131                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1132                                                      &next)) != NULL) {
1133                         obd->obd_force = force;
1134                 }
1135         }
1136
1137         if (sbi->ll_lcq) {
1138                 /* Only if client_common_fill_super succeeded */
1139                 client_common_put_super(sb);
1140         }
1141
1142         next = 0;
1143         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1144                 class_manual_cleanup(obd);
1145         }
1146
1147         if (sbi->ll_flags & LL_SBI_VERBOSE)
1148                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1149
1150         if (profilenm)
1151                 class_del_profile(profilenm);
1152
1153         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1154                 bdi_destroy(&lsi->lsi_bdi);
1155                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1156         }
1157
1158         ll_free_sbi(sb);
1159         lsi->lsi_llsbi = NULL;
1160
1161         lustre_common_put_super(sb);
1162
1163         cl_env_cache_purge(~0);
1164
1165         module_put(THIS_MODULE);
1166
1167         EXIT;
1168 } /* client_put_super */
1169
1170 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1171 {
1172         struct inode *inode = NULL;
1173
1174         /* NOTE: we depend on atomic igrab() -bzzz */
1175         lock_res_and_lock(lock);
1176         if (lock->l_resource->lr_lvb_inode) {
1177                 struct ll_inode_info * lli;
1178                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1179                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1180                         inode = igrab(lock->l_resource->lr_lvb_inode);
1181                 } else {
1182                         inode = lock->l_resource->lr_lvb_inode;
1183                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1184                                          D_WARNING, lock, "lr_lvb_inode %p is "
1185                                          "bogus: magic %08x",
1186                                          lock->l_resource->lr_lvb_inode,
1187                                          lli->lli_inode_magic);
1188                         inode = NULL;
1189                 }
1190         }
1191         unlock_res_and_lock(lock);
1192         return inode;
1193 }
1194
1195 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1196 {
1197         struct inode *inode = NULL;
1198         /* NOTE: we depend on atomic igrab() -bzzz */
1199         lock_res_and_lock(lock);
1200         if (lock->l_ast_data) {
1201                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1202                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1203                         inode = igrab(lock->l_ast_data);
1204                 } else {
1205                         inode = lock->l_ast_data;
1206                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1207                                          D_WARNING, lock, "l_ast_data %p is "
1208                                          "bogus: magic %08x", lock->l_ast_data,
1209                                          lli->lli_inode_magic);
1210                         inode = NULL;
1211                 }
1212         }
1213         unlock_res_and_lock(lock);
1214         return inode;
1215 }
1216
1217 static void ll_dir_clear_lsm_md(struct inode *inode)
1218 {
1219         struct ll_inode_info *lli = ll_i2info(inode);
1220
1221         LASSERT(S_ISDIR(inode->i_mode));
1222
1223         if (lli->lli_lsm_md != NULL) {
1224                 lmv_free_memmd(lli->lli_lsm_md);
1225                 lli->lli_lsm_md = NULL;
1226         }
1227 }
1228
1229 static struct inode *ll_iget_anon_dir(struct super_block *sb,
1230                                       const struct lu_fid *fid,
1231                                       struct lustre_md *md)
1232 {
1233         struct ll_sb_info       *sbi = ll_s2sbi(sb);
1234         struct mdt_body         *body = md->body;
1235         struct inode            *inode;
1236         ino_t                   ino;
1237         ENTRY;
1238
1239         ino = cl_fid_build_ino(fid, sbi->ll_flags & LL_SBI_32BIT_API);
1240         inode = iget_locked(sb, ino);
1241         if (inode == NULL) {
1242                 CERROR("%s: failed get simple inode "DFID": rc = -ENOENT\n",
1243                        ll_get_fsname(sb, NULL, 0), PFID(fid));
1244                 RETURN(ERR_PTR(-ENOENT));
1245         }
1246
1247         if (inode->i_state & I_NEW) {
1248                 struct ll_inode_info *lli = ll_i2info(inode);
1249                 struct lmv_stripe_md *lsm = md->lmv;
1250
1251                 inode->i_mode = (inode->i_mode & ~S_IFMT) |
1252                                 (body->mode & S_IFMT);
1253                 LASSERTF(S_ISDIR(inode->i_mode), "Not slave inode "DFID"\n",
1254                          PFID(fid));
1255
1256                 LTIME_S(inode->i_mtime) = 0;
1257                 LTIME_S(inode->i_atime) = 0;
1258                 LTIME_S(inode->i_ctime) = 0;
1259                 inode->i_rdev = 0;
1260
1261                 /* initializing backing dev info. */
1262                 inode->i_mapping->backing_dev_info =
1263                                                 &s2lsi(inode->i_sb)->lsi_bdi;
1264                 inode->i_op = &ll_dir_inode_operations;
1265                 inode->i_fop = &ll_dir_operations;
1266                 lli->lli_fid = *fid;
1267                 ll_lli_init(lli);
1268
1269                 LASSERT(lsm != NULL);
1270                 /* master stripe FID */
1271                 lli->lli_pfid = lsm->lsm_md_oinfo[0].lmo_fid;
1272                 CDEBUG(D_INODE, "lli %p master "DFID" slave "DFID"\n",
1273                        lli, PFID(fid), PFID(&lli->lli_pfid));
1274                 unlock_new_inode(inode);
1275         }
1276
1277         RETURN(inode);
1278 }
1279
1280 static int ll_init_lsm_md(struct inode *inode, struct lustre_md *md)
1281 {
1282         struct lu_fid *fid;
1283         struct lmv_stripe_md *lsm = md->lmv;
1284         int i;
1285
1286         LASSERT(lsm != NULL);
1287         /* XXX sigh, this lsm_root initialization should be in
1288          * LMV layer, but it needs ll_iget right now, so we
1289          * put this here right now. */
1290         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1291                 fid = &lsm->lsm_md_oinfo[i].lmo_fid;
1292                 LASSERT(lsm->lsm_md_oinfo[i].lmo_root == NULL);
1293                 if (i == 0) {
1294                         lsm->lsm_md_oinfo[i].lmo_root = inode;
1295                 } else {
1296                         /* Unfortunately ll_iget will call ll_update_inode,
1297                          * where the initialization of slave inode is slightly
1298                          * different, so it reset lsm_md to NULL to avoid
1299                          * initializing lsm for slave inode. */
1300                         lsm->lsm_md_oinfo[i].lmo_root =
1301                                         ll_iget_anon_dir(inode->i_sb, fid, md);
1302                         if (IS_ERR(lsm->lsm_md_oinfo[i].lmo_root)) {
1303                                 int rc = PTR_ERR(lsm->lsm_md_oinfo[i].lmo_root);
1304
1305                                 lsm->lsm_md_oinfo[i].lmo_root = NULL;
1306                                 return rc;
1307                         }
1308                 }
1309         }
1310
1311         /* Here is where the lsm is being initialized(fill lmo_info) after
1312          * client retrieve MD stripe information from MDT. */
1313         return md_update_lsm_md(ll_i2mdexp(inode), lsm, md->body,
1314                                 ll_md_blocking_ast);
1315 }
1316
1317 static inline int lli_lsm_md_eq(const struct lmv_stripe_md *lsm_md1,
1318                                 const struct lmv_stripe_md *lsm_md2)
1319 {
1320         return lsm_md1->lsm_md_magic == lsm_md2->lsm_md_magic &&
1321                lsm_md1->lsm_md_stripe_count == lsm_md2->lsm_md_stripe_count &&
1322                lsm_md1->lsm_md_master_mdt_index ==
1323                                         lsm_md2->lsm_md_master_mdt_index &&
1324                lsm_md1->lsm_md_hash_type == lsm_md2->lsm_md_hash_type &&
1325                lsm_md1->lsm_md_layout_version ==
1326                                         lsm_md2->lsm_md_layout_version &&
1327                strcmp(lsm_md1->lsm_md_pool_name,
1328                       lsm_md2->lsm_md_pool_name) == 0;
1329 }
1330
1331 static void ll_update_lsm_md(struct inode *inode, struct lustre_md *md)
1332 {
1333         struct ll_inode_info *lli = ll_i2info(inode);
1334         struct lmv_stripe_md *lsm = md->lmv;
1335         int idx;
1336         ENTRY;
1337
1338         LASSERT(S_ISDIR(inode->i_mode));
1339         CDEBUG(D_INODE, "update lsm %p of "DFID"\n", lli->lli_lsm_md,
1340                PFID(ll_inode2fid(inode)));
1341
1342         /* no striped information from request. */
1343         if (lsm == NULL) {
1344                 if (lli->lli_lsm_md == NULL) {
1345                         RETURN_EXIT;
1346                 } else if (lli->lli_lsm_md->lsm_md_magic == LMV_MAGIC_MIGRATE) {
1347                         /* migration is done, the temporay MIGRATE layout has
1348                          * been removed */
1349                         CDEBUG(D_INODE, DFID" finish migration.\n",
1350                                PFID(ll_inode2fid(inode)));
1351                         lmv_free_memmd(lli->lli_lsm_md);
1352                         lli->lli_lsm_md = NULL;
1353                         RETURN_EXIT;
1354                 } else {
1355                         /* The lustre_md from req does not include stripeEA,
1356                          * see ll_md_setattr */
1357                         RETURN_EXIT;
1358                 }
1359         }
1360
1361         /* set the directory layout */
1362         if (lli->lli_lsm_md == NULL) {
1363                 int rc;
1364
1365                 rc = ll_init_lsm_md(inode, md);
1366                 if (rc != 0) {
1367                         CERROR("%s: init "DFID" failed: rc = %d\n",
1368                                ll_get_fsname(inode->i_sb, NULL, 0),
1369                                PFID(&lli->lli_fid), rc);
1370                         return;
1371                 }
1372                 lli->lli_lsm_md = lsm;
1373                 /* set lsm_md to NULL, so the following free lustre_md
1374                  * will not free this lsm */
1375                 md->lmv = NULL;
1376                 CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm,
1377                        lsm->lsm_md_magic, PFID(ll_inode2fid(inode)));
1378                 RETURN_EXIT;
1379         }
1380
1381         /* Compare the old and new stripe information */
1382         if (!lli_lsm_md_eq(lli->lli_lsm_md, lsm)) {
1383                 CERROR("inode %p %lu mismatch\n"
1384                        "    new(%p)     vs     lli_lsm_md(%p):\n"
1385                        "    magic:      %x                   %x\n"
1386                        "    count:      %x                   %x\n"
1387                        "    master:     %x                   %x\n"
1388                        "    hash_type:  %x                   %x\n"
1389                        "    layout:     %x                   %x\n"
1390                        "    pool:       %s                   %s\n",
1391                        inode, inode->i_ino, lsm, lli->lli_lsm_md,
1392                        lsm->lsm_md_magic, lli->lli_lsm_md->lsm_md_magic,
1393                        lsm->lsm_md_stripe_count,
1394                        lli->lli_lsm_md->lsm_md_stripe_count,
1395                        lsm->lsm_md_master_mdt_index,
1396                        lli->lli_lsm_md->lsm_md_master_mdt_index,
1397                        lsm->lsm_md_hash_type, lli->lli_lsm_md->lsm_md_hash_type,
1398                        lsm->lsm_md_layout_version,
1399                        lli->lli_lsm_md->lsm_md_layout_version,
1400                        lsm->lsm_md_pool_name,
1401                        lli->lli_lsm_md->lsm_md_pool_name);
1402                 return;
1403         }
1404
1405         for (idx = 0; idx < lli->lli_lsm_md->lsm_md_stripe_count; idx++) {
1406                 if (!lu_fid_eq(&lli->lli_lsm_md->lsm_md_oinfo[idx].lmo_fid,
1407                                &lsm->lsm_md_oinfo[idx].lmo_fid)) {
1408                         CERROR("%s: FID in lsm mismatch idx %d, old: "DFID
1409                                "new:"DFID"\n",
1410                                ll_get_fsname(inode->i_sb, NULL, 0), idx,
1411                              PFID(&lli->lli_lsm_md->lsm_md_oinfo[idx].lmo_fid),
1412                                PFID(&lsm->lsm_md_oinfo[idx].lmo_fid));
1413                         return;
1414                 }
1415         }
1416
1417         md_update_lsm_md(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md,
1418                          md->body, ll_md_blocking_ast);
1419
1420         RETURN_EXIT;
1421 }
1422
1423 void ll_clear_inode(struct inode *inode)
1424 {
1425         struct ll_inode_info *lli = ll_i2info(inode);
1426         struct ll_sb_info *sbi = ll_i2sbi(inode);
1427         ENTRY;
1428
1429         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1430                PFID(ll_inode2fid(inode)), inode);
1431
1432         if (S_ISDIR(inode->i_mode)) {
1433                 /* these should have been cleared in ll_file_release */
1434                 LASSERT(lli->lli_opendir_key == NULL);
1435                 LASSERT(lli->lli_sai == NULL);
1436                 LASSERT(lli->lli_opendir_pid == 0);
1437         }
1438
1439         spin_lock(&lli->lli_lock);
1440         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1441         spin_unlock(&lli->lli_lock);
1442         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1443
1444         LASSERT(!lli->lli_open_fd_write_count);
1445         LASSERT(!lli->lli_open_fd_read_count);
1446         LASSERT(!lli->lli_open_fd_exec_count);
1447
1448         if (lli->lli_mds_write_och)
1449                 ll_md_real_close(inode, FMODE_WRITE);
1450         if (lli->lli_mds_exec_och)
1451                 ll_md_real_close(inode, FMODE_EXEC);
1452         if (lli->lli_mds_read_och)
1453                 ll_md_real_close(inode, FMODE_READ);
1454
1455         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1456                 OBD_FREE(lli->lli_symlink_name,
1457                          strlen(lli->lli_symlink_name) + 1);
1458                 lli->lli_symlink_name = NULL;
1459         }
1460
1461         ll_xattr_cache_destroy(inode);
1462
1463         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1464                 LASSERT(lli->lli_posix_acl == NULL);
1465                 if (lli->lli_remote_perms) {
1466                         free_rmtperm_hash(lli->lli_remote_perms);
1467                         lli->lli_remote_perms = NULL;
1468                 }
1469         }
1470 #ifdef CONFIG_FS_POSIX_ACL
1471         else if (lli->lli_posix_acl) {
1472                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1473                 LASSERT(lli->lli_remote_perms == NULL);
1474                 posix_acl_release(lli->lli_posix_acl);
1475                 lli->lli_posix_acl = NULL;
1476         }
1477 #endif
1478         lli->lli_inode_magic = LLI_INODE_DEAD;
1479
1480         ll_clear_inode_capas(inode);
1481         if (S_ISDIR(inode->i_mode))
1482                 ll_dir_clear_lsm_md(inode);
1483         else
1484                 LASSERT(list_empty(&lli->lli_agl_list));
1485
1486         /*
1487          * XXX This has to be done before lsm is freed below, because
1488          * cl_object still uses inode lsm.
1489          */
1490         cl_inode_fini(inode);
1491         lli->lli_has_smd = false;
1492
1493         EXIT;
1494 }
1495
1496 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1497                   struct md_open_data **mod)
1498 {
1499         struct lustre_md md;
1500         struct inode *inode = dentry->d_inode;
1501         struct ll_sb_info *sbi = ll_i2sbi(inode);
1502         struct ptlrpc_request *request = NULL;
1503         int rc, ia_valid;
1504         ENTRY;
1505
1506         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1507                                      LUSTRE_OPC_ANY, NULL);
1508         if (IS_ERR(op_data))
1509                 RETURN(PTR_ERR(op_data));
1510
1511         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1512                         &request, mod);
1513         if (rc) {
1514                 ptlrpc_req_finished(request);
1515                 if (rc == -ENOENT) {
1516                         clear_nlink(inode);
1517                         /* Unlinked special device node? Or just a race?
1518                          * Pretend we done everything. */
1519                         if (!S_ISREG(inode->i_mode) &&
1520                             !S_ISDIR(inode->i_mode)) {
1521                                 ia_valid = op_data->op_attr.ia_valid;
1522                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1523                                 rc = simple_setattr(dentry, &op_data->op_attr);
1524                                 op_data->op_attr.ia_valid = ia_valid;
1525                         }
1526                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1527                         CERROR("md_setattr fails: rc = %d\n", rc);
1528                 }
1529                 RETURN(rc);
1530         }
1531
1532         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1533                               sbi->ll_md_exp, &md);
1534         if (rc) {
1535                 ptlrpc_req_finished(request);
1536                 RETURN(rc);
1537         }
1538
1539         ia_valid = op_data->op_attr.ia_valid;
1540         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1541          * cache is not cleared yet. */
1542         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1543         rc = simple_setattr(dentry, &op_data->op_attr);
1544         op_data->op_attr.ia_valid = ia_valid;
1545
1546         /* Extract epoch data if obtained. */
1547         op_data->op_handle = md.body->handle;
1548         op_data->op_ioepoch = md.body->ioepoch;
1549
1550         ll_update_inode(inode, &md);
1551         ptlrpc_req_finished(request);
1552
1553         RETURN(rc);
1554 }
1555
1556 /* Close IO epoch and send Size-on-MDS attribute update. */
1557 static int ll_setattr_done_writing(struct inode *inode,
1558                                    struct md_op_data *op_data,
1559                                    struct md_open_data *mod)
1560 {
1561         struct ll_inode_info *lli = ll_i2info(inode);
1562         int rc = 0;
1563         ENTRY;
1564
1565         LASSERT(op_data != NULL);
1566         if (!S_ISREG(inode->i_mode))
1567                 RETURN(0);
1568
1569         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1570                op_data->op_ioepoch, PFID(&lli->lli_fid));
1571
1572         op_data->op_flags = MF_EPOCH_CLOSE;
1573         ll_done_writing_attr(inode, op_data);
1574         ll_pack_inode2opdata(inode, op_data, NULL);
1575
1576         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1577         if (rc == -EAGAIN) {
1578                 /* MDS has instructed us to obtain Size-on-MDS attribute
1579                  * from OSTs and send setattr to back to MDS. */
1580                 rc = ll_som_update(inode, op_data);
1581         } else if (rc) {
1582                 CERROR("%s: inode "DFID" mdc truncate failed: rc = %d\n",
1583                        ll_i2sbi(inode)->ll_md_exp->exp_obd->obd_name,
1584                        PFID(ll_inode2fid(inode)), rc);
1585         }
1586         RETURN(rc);
1587 }
1588
1589 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1590 {
1591         struct obd_capa *capa;
1592         int rc;
1593
1594         if (attr->ia_valid & ATTR_SIZE)
1595                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1596         else
1597                 capa = ll_mdscapa_get(inode);
1598
1599         rc = cl_setattr_ost(inode, attr, capa);
1600
1601         if (attr->ia_valid & ATTR_SIZE)
1602                 ll_truncate_free_capa(capa);
1603         else
1604                 capa_put(capa);
1605
1606         return rc;
1607 }
1608
1609 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1610  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1611  * keep these values until such a time that objects are allocated for it.
1612  * We do the MDS operations first, as it is checking permissions for us.
1613  * We don't to the MDS RPC if there is nothing that we want to store there,
1614  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1615  * going to do an RPC anyways.
1616  *
1617  * If we are doing a truncate, we will send the mtime and ctime updates
1618  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1619  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1620  * at the same time.
1621  *
1622  * In case of HSMimport, we only set attr on MDS.
1623  */
1624 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1625 {
1626         struct inode *inode = dentry->d_inode;
1627         struct ll_inode_info *lli = ll_i2info(inode);
1628         struct md_op_data *op_data = NULL;
1629         struct md_open_data *mod = NULL;
1630         bool file_is_released = false;
1631         int rc = 0, rc1 = 0;
1632         ENTRY;
1633
1634         CDEBUG(D_VFSTRACE, "%s: setattr inode "DFID"(%p) from %llu to %llu, "
1635                "valid %x, hsm_import %d\n",
1636                ll_get_fsname(inode->i_sb, NULL, 0), PFID(&lli->lli_fid),
1637                inode, i_size_read(inode), attr->ia_size, attr->ia_valid,
1638                hsm_import);
1639
1640         if (attr->ia_valid & ATTR_SIZE) {
1641                 /* Check new size against VFS/VM file size limit and rlimit */
1642                 rc = inode_newsize_ok(inode, attr->ia_size);
1643                 if (rc)
1644                         RETURN(rc);
1645
1646                 /* The maximum Lustre file size is variable, based on the
1647                  * OST maximum object size and number of stripes.  This
1648                  * needs another check in addition to the VFS check above. */
1649                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1650                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1651                                PFID(&lli->lli_fid), attr->ia_size,
1652                                ll_file_maxbytes(inode));
1653                         RETURN(-EFBIG);
1654                 }
1655
1656                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1657         }
1658
1659         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1660         if (attr->ia_valid & TIMES_SET_FLAGS) {
1661                 if (current_fsuid() != inode->i_uid &&
1662                     !cfs_capable(CFS_CAP_FOWNER))
1663                         RETURN(-EPERM);
1664         }
1665
1666         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1667         if (attr->ia_valid & ATTR_CTIME) {
1668                 attr->ia_ctime = CFS_CURRENT_TIME;
1669                 attr->ia_valid |= ATTR_CTIME_SET;
1670         }
1671         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1672             (attr->ia_valid & ATTR_ATIME)) {
1673                 attr->ia_atime = CFS_CURRENT_TIME;
1674                 attr->ia_valid |= ATTR_ATIME_SET;
1675         }
1676         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1677             (attr->ia_valid & ATTR_MTIME)) {
1678                 attr->ia_mtime = CFS_CURRENT_TIME;
1679                 attr->ia_valid |= ATTR_MTIME_SET;
1680         }
1681
1682         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1683                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1684                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1685                        cfs_time_current_sec());
1686
1687         /* We always do an MDS RPC, even if we're only changing the size;
1688          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1689
1690         OBD_ALLOC_PTR(op_data);
1691         if (op_data == NULL)
1692                 RETURN(-ENOMEM);
1693
1694         if (!S_ISDIR(inode->i_mode)) {
1695                 if (attr->ia_valid & ATTR_SIZE)
1696                         inode_dio_write_done(inode);
1697                 mutex_unlock(&inode->i_mutex);
1698         }
1699
1700         /* truncate on a released file must failed with -ENODATA,
1701          * so size must not be set on MDS for released file
1702          * but other attributes must be set
1703          */
1704         if (S_ISREG(inode->i_mode)) {
1705                 struct lov_stripe_md *lsm;
1706                 __u32 gen;
1707
1708                 ll_layout_refresh(inode, &gen);
1709                 lsm = ccc_inode_lsm_get(inode);
1710                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1711                         file_is_released = true;
1712                 ccc_inode_lsm_put(inode, lsm);
1713
1714                 if (!hsm_import && attr->ia_valid & ATTR_SIZE) {
1715                         if (file_is_released) {
1716                                 rc = ll_layout_restore(inode, 0, attr->ia_size);
1717                                 if (rc < 0)
1718                                         GOTO(out, rc);
1719
1720                                 file_is_released = false;
1721                                 ll_layout_refresh(inode, &gen);
1722                         }
1723
1724                         /* If we are changing file size, file content is
1725                          * modified, flag it. */
1726                         attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1727                         spin_lock(&lli->lli_lock);
1728                         lli->lli_flags |= LLIF_DATA_MODIFIED;
1729                         spin_unlock(&lli->lli_lock);
1730                         op_data->op_bias |= MDS_DATA_MODIFIED;
1731                 }
1732         }
1733
1734         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1735
1736         /* Open epoch for truncate. */
1737         if (exp_connect_som(ll_i2mdexp(inode)) && !hsm_import &&
1738             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1739                 op_data->op_flags = MF_EPOCH_OPEN;
1740
1741         rc = ll_md_setattr(dentry, op_data, &mod);
1742         if (rc)
1743                 GOTO(out, rc);
1744
1745         /* RPC to MDT is sent, cancel data modification flag */
1746         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1747                 spin_lock(&lli->lli_lock);
1748                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1749                 spin_unlock(&lli->lli_lock);
1750         }
1751
1752         ll_ioepoch_open(lli, op_data->op_ioepoch);
1753         if (!S_ISREG(inode->i_mode) || file_is_released)
1754                 GOTO(out, rc = 0);
1755
1756         if (attr->ia_valid & (ATTR_SIZE |
1757                               ATTR_ATIME | ATTR_ATIME_SET |
1758                               ATTR_MTIME | ATTR_MTIME_SET)) {
1759                 /* For truncate and utimes sending attributes to OSTs, setting
1760                  * mtime/atime to the past will be performed under PW [0:EOF]
1761                  * extent lock (new_size:EOF for truncate).  It may seem
1762                  * excessive to send mtime/atime updates to OSTs when not
1763                  * setting times to past, but it is necessary due to possible
1764                  * time de-synchronization between MDT inode and OST objects */
1765                 if (attr->ia_valid & ATTR_SIZE)
1766                         down_write(&lli->lli_trunc_sem);
1767                 rc = ll_setattr_ost(inode, attr);
1768                 if (attr->ia_valid & ATTR_SIZE)
1769                         up_write(&lli->lli_trunc_sem);
1770         }
1771         EXIT;
1772 out:
1773         if (op_data) {
1774                 if (op_data->op_ioepoch) {
1775                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1776                         if (!rc)
1777                                 rc = rc1;
1778                 }
1779                 ll_finish_md_op_data(op_data);
1780         }
1781         if (!S_ISDIR(inode->i_mode)) {
1782                 mutex_lock(&inode->i_mutex);
1783                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1784                         inode_dio_wait(inode);
1785         }
1786
1787         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1788                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1789
1790         return rc;
1791 }
1792
1793 int ll_setattr(struct dentry *de, struct iattr *attr)
1794 {
1795         int mode = de->d_inode->i_mode;
1796
1797         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1798                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1799                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1800
1801         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1802                                (ATTR_SIZE|ATTR_MODE)) &&
1803             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1804              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1805               !(attr->ia_mode & S_ISGID))))
1806                 attr->ia_valid |= ATTR_FORCE;
1807
1808         if ((mode & S_ISUID) &&
1809             !(attr->ia_mode & S_ISUID) &&
1810             !(attr->ia_valid & ATTR_KILL_SUID))
1811                 attr->ia_valid |= ATTR_KILL_SUID;
1812
1813         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1814             !(attr->ia_mode & S_ISGID) &&
1815             !(attr->ia_valid & ATTR_KILL_SGID))
1816                 attr->ia_valid |= ATTR_KILL_SGID;
1817
1818         return ll_setattr_raw(de, attr, false);
1819 }
1820
1821 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1822                        __u64 max_age, __u32 flags)
1823 {
1824         struct ll_sb_info *sbi = ll_s2sbi(sb);
1825         struct obd_statfs obd_osfs;
1826         int rc;
1827         ENTRY;
1828
1829         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1830         if (rc) {
1831                 CERROR("md_statfs fails: rc = %d\n", rc);
1832                 RETURN(rc);
1833         }
1834
1835         osfs->os_type = sb->s_magic;
1836
1837         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1838                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1839
1840         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1841                 flags |= OBD_STATFS_NODELAY;
1842
1843         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1844         if (rc) {
1845                 CERROR("obd_statfs fails: rc = %d\n", rc);
1846                 RETURN(rc);
1847         }
1848
1849         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1850                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1851                obd_osfs.os_files);
1852
1853         osfs->os_bsize = obd_osfs.os_bsize;
1854         osfs->os_blocks = obd_osfs.os_blocks;
1855         osfs->os_bfree = obd_osfs.os_bfree;
1856         osfs->os_bavail = obd_osfs.os_bavail;
1857
1858         /* If we don't have as many objects free on the OST as inodes
1859          * on the MDS, we reduce the total number of inodes to
1860          * compensate, so that the "inodes in use" number is correct.
1861          */
1862         if (obd_osfs.os_ffree < osfs->os_ffree) {
1863                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1864                         obd_osfs.os_ffree;
1865                 osfs->os_ffree = obd_osfs.os_ffree;
1866         }
1867
1868         RETURN(rc);
1869 }
1870 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1871 {
1872         struct super_block *sb = de->d_sb;
1873         struct obd_statfs osfs;
1874         __u64 fsid = huge_encode_dev(sb->s_dev);
1875         int rc;
1876
1877         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1878         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1879
1880         /* Some amount of caching on the client is allowed */
1881         rc = ll_statfs_internal(sb, &osfs,
1882                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1883                                 0);
1884         if (rc)
1885                 return rc;
1886
1887         statfs_unpack(sfs, &osfs);
1888
1889         /* We need to downshift for all 32-bit kernels, because we can't
1890          * tell if the kernel is being called via sys_statfs64() or not.
1891          * Stop before overflowing f_bsize - in which case it is better
1892          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1893         if (sizeof(long) < 8) {
1894                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1895                         sfs->f_bsize <<= 1;
1896
1897                         osfs.os_blocks >>= 1;
1898                         osfs.os_bfree >>= 1;
1899                         osfs.os_bavail >>= 1;
1900                 }
1901         }
1902
1903         sfs->f_blocks = osfs.os_blocks;
1904         sfs->f_bfree = osfs.os_bfree;
1905         sfs->f_bavail = osfs.os_bavail;
1906         sfs->f_fsid.val[0] = (__u32)fsid;
1907         sfs->f_fsid.val[1] = (__u32)(fsid >> 32);
1908         return 0;
1909 }
1910
1911 void ll_inode_size_lock(struct inode *inode)
1912 {
1913         struct ll_inode_info *lli;
1914
1915         LASSERT(!S_ISDIR(inode->i_mode));
1916
1917         lli = ll_i2info(inode);
1918         LASSERT(lli->lli_size_sem_owner != current);
1919         down(&lli->lli_size_sem);
1920         LASSERT(lli->lli_size_sem_owner == NULL);
1921         lli->lli_size_sem_owner = current;
1922 }
1923
1924 void ll_inode_size_unlock(struct inode *inode)
1925 {
1926         struct ll_inode_info *lli;
1927
1928         lli = ll_i2info(inode);
1929         LASSERT(lli->lli_size_sem_owner == current);
1930         lli->lli_size_sem_owner = NULL;
1931         up(&lli->lli_size_sem);
1932 }
1933
1934 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1935 {
1936         struct ll_inode_info *lli = ll_i2info(inode);
1937         struct mdt_body *body = md->body;
1938         struct lov_stripe_md *lsm = md->lsm;
1939         struct ll_sb_info *sbi = ll_i2sbi(inode);
1940
1941         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1942         if (lsm != NULL) {
1943                 if (!lli->lli_has_smd &&
1944                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1945                         cl_file_inode_init(inode, md);
1946
1947                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1948                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1949                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1950         }
1951
1952         if (S_ISDIR(inode->i_mode))
1953                 ll_update_lsm_md(inode, md);
1954
1955         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1956                 if (body->valid & OBD_MD_FLRMTPERM)
1957                         ll_update_remote_perm(inode, md->remote_perm);
1958         }
1959 #ifdef CONFIG_FS_POSIX_ACL
1960         else if (body->valid & OBD_MD_FLACL) {
1961                 spin_lock(&lli->lli_lock);
1962                 if (lli->lli_posix_acl)
1963                         posix_acl_release(lli->lli_posix_acl);
1964                 lli->lli_posix_acl = md->posix_acl;
1965                 spin_unlock(&lli->lli_lock);
1966         }
1967 #endif
1968         inode->i_ino = cl_fid_build_ino(&body->fid1,
1969                                         sbi->ll_flags & LL_SBI_32BIT_API);
1970         inode->i_generation = cl_fid_build_gen(&body->fid1);
1971
1972         if (body->valid & OBD_MD_FLATIME) {
1973                 if (body->atime > LTIME_S(inode->i_atime))
1974                         LTIME_S(inode->i_atime) = body->atime;
1975                 lli->lli_lvb.lvb_atime = body->atime;
1976         }
1977         if (body->valid & OBD_MD_FLMTIME) {
1978                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1979                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1980                                "to "LPU64"\n", inode->i_ino,
1981                                LTIME_S(inode->i_mtime), body->mtime);
1982                         LTIME_S(inode->i_mtime) = body->mtime;
1983                 }
1984                 lli->lli_lvb.lvb_mtime = body->mtime;
1985         }
1986         if (body->valid & OBD_MD_FLCTIME) {
1987                 if (body->ctime > LTIME_S(inode->i_ctime))
1988                         LTIME_S(inode->i_ctime) = body->ctime;
1989                 lli->lli_lvb.lvb_ctime = body->ctime;
1990         }
1991         if (body->valid & OBD_MD_FLMODE)
1992                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1993         if (body->valid & OBD_MD_FLTYPE)
1994                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1995         LASSERT(inode->i_mode != 0);
1996         if (S_ISREG(inode->i_mode)) {
1997                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1998         } else {
1999                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
2000         }
2001         if (body->valid & OBD_MD_FLUID)
2002                 inode->i_uid = body->uid;
2003         if (body->valid & OBD_MD_FLGID)
2004                 inode->i_gid = body->gid;
2005         if (body->valid & OBD_MD_FLFLAGS)
2006                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
2007         if (body->valid & OBD_MD_FLNLINK)
2008                 set_nlink(inode, body->nlink);
2009         if (body->valid & OBD_MD_FLRDEV)
2010                 inode->i_rdev = old_decode_dev(body->rdev);
2011
2012         if (body->valid & OBD_MD_FLID) {
2013                 /* FID shouldn't be changed! */
2014                 if (fid_is_sane(&lli->lli_fid)) {
2015                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
2016                                  "Trying to change FID "DFID
2017                                  " to the "DFID", inode "DFID"(%p)\n",
2018                                  PFID(&lli->lli_fid), PFID(&body->fid1),
2019                                  PFID(ll_inode2fid(inode)), inode);
2020                 } else {
2021                         lli->lli_fid = body->fid1;
2022                 }
2023         }
2024
2025         LASSERT(fid_seq(&lli->lli_fid) != 0);
2026
2027         if (body->valid & OBD_MD_FLSIZE) {
2028                 if (exp_connect_som(ll_i2mdexp(inode)) &&
2029                     S_ISREG(inode->i_mode)) {
2030                         struct lustre_handle lockh;
2031                         ldlm_mode_t mode;
2032
2033                         /* As it is possible a blocking ast has been processed
2034                          * by this time, we need to check there is an UPDATE
2035                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
2036                          * it. */
2037                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
2038                                                &lockh, LDLM_FL_CBPENDING,
2039                                                LCK_CR | LCK_CW |
2040                                                LCK_PR | LCK_PW);
2041                         if (mode) {
2042                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
2043                                                       LLIF_EPOCH_PENDING |
2044                                                       LLIF_SOM_DIRTY)) {
2045                                         CERROR("%s: inode "DFID" flags %u still"
2046                                                " has size authority! do not "
2047                                                "trust the size from MDS\n",
2048                                                sbi->ll_md_exp->exp_obd->obd_name,
2049                                                PFID(ll_inode2fid(inode)),
2050                                                lli->lli_flags);
2051                                 } else {
2052                                         /* Use old size assignment to avoid
2053                                          * deadlock bz14138 & bz14326 */
2054                                         i_size_write(inode, body->size);
2055                                         spin_lock(&lli->lli_lock);
2056                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
2057                                         spin_unlock(&lli->lli_lock);
2058                                 }
2059                                 ldlm_lock_decref(&lockh, mode);
2060                         }
2061                 } else {
2062                         /* Use old size assignment to avoid
2063                          * deadlock bz14138 & bz14326 */
2064                         i_size_write(inode, body->size);
2065
2066                         CDEBUG(D_VFSTRACE,
2067                                "inode="DFID", updating i_size %llu\n",
2068                                PFID(ll_inode2fid(inode)),
2069                                (unsigned long long)body->size);
2070                 }
2071
2072                 if (body->valid & OBD_MD_FLBLOCKS)
2073                         inode->i_blocks = body->blocks;
2074         }
2075
2076         if (body->valid & OBD_MD_FLMDSCAPA) {
2077                 LASSERT(md->mds_capa);
2078                 ll_add_capa(inode, md->mds_capa);
2079         }
2080         if (body->valid & OBD_MD_FLOSSCAPA) {
2081                 LASSERT(md->oss_capa);
2082                 ll_add_capa(inode, md->oss_capa);
2083         }
2084
2085         if (body->valid & OBD_MD_TSTATE) {
2086                 if (body->t_state & MS_RESTORE)
2087                         lli->lli_flags |= LLIF_FILE_RESTORING;
2088         }
2089 }
2090
2091 void ll_read_inode2(struct inode *inode, void *opaque)
2092 {
2093         struct lustre_md *md = opaque;
2094         struct ll_inode_info *lli = ll_i2info(inode);
2095         ENTRY;
2096
2097         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
2098                PFID(&lli->lli_fid), inode);
2099
2100         LASSERT(!lli->lli_has_smd);
2101
2102         /* Core attributes from the MDS first.  This is a new inode, and
2103          * the VFS doesn't zero times in the core inode so we have to do
2104          * it ourselves.  They will be overwritten by either MDS or OST
2105          * attributes - we just need to make sure they aren't newer. */
2106         LTIME_S(inode->i_mtime) = 0;
2107         LTIME_S(inode->i_atime) = 0;
2108         LTIME_S(inode->i_ctime) = 0;
2109         inode->i_rdev = 0;
2110         ll_update_inode(inode, md);
2111
2112         /* OIDEBUG(inode); */
2113
2114         /* initializing backing dev info. */
2115         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
2116
2117
2118         if (S_ISREG(inode->i_mode)) {
2119                 struct ll_sb_info *sbi = ll_i2sbi(inode);
2120                 inode->i_op = &ll_file_inode_operations;
2121                 inode->i_fop = sbi->ll_fop;
2122                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
2123                 EXIT;
2124         } else if (S_ISDIR(inode->i_mode)) {
2125                 inode->i_op = &ll_dir_inode_operations;
2126                 inode->i_fop = &ll_dir_operations;
2127                 EXIT;
2128         } else if (S_ISLNK(inode->i_mode)) {
2129                 inode->i_op = &ll_fast_symlink_inode_operations;
2130                 EXIT;
2131         } else {
2132                 inode->i_op = &ll_special_inode_operations;
2133
2134                 init_special_inode(inode, inode->i_mode,
2135                                    inode->i_rdev);
2136
2137                 EXIT;
2138         }
2139 }
2140
2141 void ll_delete_inode(struct inode *inode)
2142 {
2143         struct cl_inode_info *lli = cl_i2info(inode);
2144         ENTRY;
2145
2146         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
2147                 /* discard all dirty pages before truncating them, required by
2148                  * osc_extent implementation at LU-1030. */
2149                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
2150                                    CL_FSYNC_DISCARD, 1);
2151
2152         truncate_inode_pages(&inode->i_data, 0);
2153
2154         /* Workaround for LU-118 */
2155         if (inode->i_data.nrpages) {
2156                 spin_lock_irq(&inode->i_data.tree_lock);
2157                 spin_unlock_irq(&inode->i_data.tree_lock);
2158                 LASSERTF(inode->i_data.nrpages == 0,
2159                          "inode="DFID"(%p) nrpages=%lu, see "
2160                          "http://jira.whamcloud.com/browse/LU-118\n",
2161                          PFID(ll_inode2fid(inode)), inode,
2162                          inode->i_data.nrpages);
2163         }
2164         /* Workaround end */
2165
2166 #ifdef HAVE_SBOPS_EVICT_INODE
2167         ll_clear_inode(inode);
2168 #endif
2169         clear_inode(inode);
2170
2171         EXIT;
2172 }
2173
2174 int ll_iocontrol(struct inode *inode, struct file *file,
2175                  unsigned int cmd, unsigned long arg)
2176 {
2177         struct ll_sb_info *sbi = ll_i2sbi(inode);
2178         struct ptlrpc_request *req = NULL;
2179         int rc, flags = 0;
2180         ENTRY;
2181
2182         switch(cmd) {
2183         case FSFILT_IOC_GETFLAGS: {
2184                 struct mdt_body *body;
2185                 struct md_op_data *op_data;
2186
2187                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
2188                                              0, 0, LUSTRE_OPC_ANY,
2189                                              NULL);
2190                 if (IS_ERR(op_data))
2191                         RETURN(PTR_ERR(op_data));
2192
2193                 op_data->op_valid = OBD_MD_FLFLAGS;
2194                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
2195                 ll_finish_md_op_data(op_data);
2196                 if (rc) {
2197                         CERROR("%s: failure inode "DFID": rc = %d\n",
2198                                sbi->ll_md_exp->exp_obd->obd_name,
2199                                PFID(ll_inode2fid(inode)), rc);
2200                         RETURN(-abs(rc));
2201                 }
2202
2203                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2204
2205                 flags = body->flags;
2206
2207                 ptlrpc_req_finished(req);
2208
2209                 RETURN(put_user(flags, (int *)arg));
2210         }
2211         case FSFILT_IOC_SETFLAGS: {
2212                 struct lov_stripe_md *lsm;
2213                 struct obd_info oinfo = { { { 0 } } };
2214                 struct md_op_data *op_data;
2215
2216                 if (get_user(flags, (int *)arg))
2217                         RETURN(-EFAULT);
2218
2219                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
2220                                              LUSTRE_OPC_ANY, NULL);
2221                 if (IS_ERR(op_data))
2222                         RETURN(PTR_ERR(op_data));
2223
2224                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
2225                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
2226                 rc = md_setattr(sbi->ll_md_exp, op_data,
2227                                 NULL, 0, NULL, 0, &req, NULL);
2228                 ll_finish_md_op_data(op_data);
2229                 ptlrpc_req_finished(req);
2230                 if (rc)
2231                         RETURN(rc);
2232
2233                 inode->i_flags = ll_ext_to_inode_flags(flags);
2234
2235                 lsm = ccc_inode_lsm_get(inode);
2236                 if (!lsm_has_objects(lsm)) {
2237                         ccc_inode_lsm_put(inode, lsm);
2238                         RETURN(0);
2239                 }
2240
2241                 OBDO_ALLOC(oinfo.oi_oa);
2242                 if (!oinfo.oi_oa) {
2243                         ccc_inode_lsm_put(inode, lsm);
2244                         RETURN(-ENOMEM);
2245                 }
2246                 oinfo.oi_md = lsm;
2247                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2248                 oinfo.oi_oa->o_flags = flags;
2249                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2250                                        OBD_MD_FLGROUP;
2251                 oinfo.oi_capa = ll_mdscapa_get(inode);
2252                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2253                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2254                 capa_put(oinfo.oi_capa);
2255                 OBDO_FREE(oinfo.oi_oa);
2256                 ccc_inode_lsm_put(inode, lsm);
2257
2258                 if (rc && rc != -EPERM && rc != -EACCES)
2259                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2260
2261                 RETURN(rc);
2262         }
2263         default:
2264                 RETURN(-ENOSYS);
2265         }
2266
2267         RETURN(0);
2268 }
2269
2270 int ll_flush_ctx(struct inode *inode)
2271 {
2272         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2273
2274         CDEBUG(D_SEC, "flush context for user %d\n", current_uid());
2275
2276         obd_set_info_async(NULL, sbi->ll_md_exp,
2277                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2278                            0, NULL, NULL);
2279         obd_set_info_async(NULL, sbi->ll_dt_exp,
2280                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2281                            0, NULL, NULL);
2282         return 0;
2283 }
2284
2285 /* umount -f client means force down, don't save state */
2286 void ll_umount_begin(struct super_block *sb)
2287 {
2288         struct ll_sb_info *sbi = ll_s2sbi(sb);
2289         struct obd_device *obd;
2290         struct obd_ioctl_data *ioc_data;
2291         ENTRY;
2292
2293         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2294                sb->s_count, atomic_read(&sb->s_active));
2295
2296         obd = class_exp2obd(sbi->ll_md_exp);
2297         if (obd == NULL) {
2298                 CERROR("Invalid MDC connection handle "LPX64"\n",
2299                        sbi->ll_md_exp->exp_handle.h_cookie);
2300                 EXIT;
2301                 return;
2302         }
2303         obd->obd_force = 1;
2304
2305         obd = class_exp2obd(sbi->ll_dt_exp);
2306         if (obd == NULL) {
2307                 CERROR("Invalid LOV connection handle "LPX64"\n",
2308                        sbi->ll_dt_exp->exp_handle.h_cookie);
2309                 EXIT;
2310                 return;
2311         }
2312         obd->obd_force = 1;
2313
2314         OBD_ALLOC_PTR(ioc_data);
2315         if (ioc_data) {
2316                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2317                               sizeof *ioc_data, ioc_data, NULL);
2318
2319                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2320                               sizeof *ioc_data, ioc_data, NULL);
2321
2322                 OBD_FREE_PTR(ioc_data);
2323         }
2324
2325         /* Really, we'd like to wait until there are no requests outstanding,
2326          * and then continue.  For now, we just invalidate the requests,
2327          * schedule() and sleep one second if needed, and hope.
2328          */
2329         schedule();
2330         EXIT;
2331 }
2332
2333 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2334 {
2335         struct ll_sb_info *sbi = ll_s2sbi(sb);
2336         char *profilenm = get_profile_name(sb);
2337         int err;
2338         __u32 read_only;
2339
2340         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2341                 read_only = *flags & MS_RDONLY;
2342                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2343                                          sizeof(KEY_READ_ONLY),
2344                                          KEY_READ_ONLY, sizeof(read_only),
2345                                          &read_only, NULL);
2346                 if (err) {
2347                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2348                                       profilenm, read_only ?
2349                                       "read-only" : "read-write", err);
2350                         return err;
2351                 }
2352
2353                 if (read_only)
2354                         sb->s_flags |= MS_RDONLY;
2355                 else
2356                         sb->s_flags &= ~MS_RDONLY;
2357
2358                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2359                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2360                                       read_only ?  "read-only" : "read-write");
2361         }
2362         return 0;
2363 }
2364
2365 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2366                   struct super_block *sb, struct lookup_intent *it)
2367 {
2368         struct ll_sb_info *sbi = NULL;
2369         struct lustre_md md = { 0 };
2370         int rc;
2371         ENTRY;
2372
2373         LASSERT(*inode || sb);
2374         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2375         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2376                               sbi->ll_md_exp, &md);
2377         if (rc)
2378                 RETURN(rc);
2379
2380         if (*inode) {
2381                 ll_update_inode(*inode, &md);
2382         } else {
2383                 LASSERT(sb != NULL);
2384
2385                 /*
2386                  * At this point server returns to client's same fid as client
2387                  * generated for creating. So using ->fid1 is okay here.
2388                  */
2389                 LASSERT(fid_is_sane(&md.body->fid1));
2390
2391                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2392                                              sbi->ll_flags & LL_SBI_32BIT_API),
2393                                  &md);
2394                 if (*inode == NULL || IS_ERR(*inode)) {
2395 #ifdef CONFIG_FS_POSIX_ACL
2396                         if (md.posix_acl) {
2397                                 posix_acl_release(md.posix_acl);
2398                                 md.posix_acl = NULL;
2399                         }
2400 #endif
2401                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2402                         *inode = NULL;
2403                         CERROR("new_inode -fatal: rc %d\n", rc);
2404                         GOTO(out, rc);
2405                 }
2406         }
2407
2408         /* Handling piggyback layout lock.
2409          * Layout lock can be piggybacked by getattr and open request.
2410          * The lsm can be applied to inode only if it comes with a layout lock
2411          * otherwise correct layout may be overwritten, for example:
2412          * 1. proc1: mdt returns a lsm but not granting layout
2413          * 2. layout was changed by another client
2414          * 3. proc2: refresh layout and layout lock granted
2415          * 4. proc1: to apply a stale layout */
2416         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2417                 struct lustre_handle lockh;
2418                 struct ldlm_lock *lock;
2419
2420                 lockh.cookie = it->d.lustre.it_lock_handle;
2421                 lock = ldlm_handle2lock(&lockh);
2422                 LASSERT(lock != NULL);
2423                 if (ldlm_has_layout(lock)) {
2424                         struct cl_object_conf conf;
2425
2426                         memset(&conf, 0, sizeof(conf));
2427                         conf.coc_opc = OBJECT_CONF_SET;
2428                         conf.coc_inode = *inode;
2429                         conf.coc_lock = lock;
2430                         conf.u.coc_md = &md;
2431                         (void)ll_layout_conf(*inode, &conf);
2432                 }
2433                 LDLM_LOCK_PUT(lock);
2434         }
2435
2436 out:
2437         if (md.lsm != NULL)
2438                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2439         md_free_lustre_md(sbi->ll_md_exp, &md);
2440         RETURN(rc);
2441 }
2442
2443 int ll_obd_statfs(struct inode *inode, void *arg)
2444 {
2445         struct ll_sb_info *sbi = NULL;
2446         struct obd_export *exp;
2447         char *buf = NULL;
2448         struct obd_ioctl_data *data = NULL;
2449         __u32 type;
2450         __u32 flags;
2451         int len = 0, rc;
2452
2453         if (!inode || !(sbi = ll_i2sbi(inode)))
2454                 GOTO(out_statfs, rc = -EINVAL);
2455
2456         rc = obd_ioctl_getdata(&buf, &len, arg);
2457         if (rc)
2458                 GOTO(out_statfs, rc);
2459
2460         data = (void*)buf;
2461         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2462             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2463                 GOTO(out_statfs, rc = -EINVAL);
2464
2465         if (data->ioc_inllen1 != sizeof(__u32) ||
2466             data->ioc_inllen2 != sizeof(__u32) ||
2467             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2468             data->ioc_plen2 != sizeof(struct obd_uuid))
2469                 GOTO(out_statfs, rc = -EINVAL);
2470
2471         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2472         if (type & LL_STATFS_LMV)
2473                 exp = sbi->ll_md_exp;
2474         else if (type & LL_STATFS_LOV)
2475                 exp = sbi->ll_dt_exp;
2476         else
2477                 GOTO(out_statfs, rc = -ENODEV);
2478
2479         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2480         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2481         if (rc)
2482                 GOTO(out_statfs, rc);
2483 out_statfs:
2484         if (buf)
2485                 obd_ioctl_freedata(buf, len);
2486         return rc;
2487 }
2488
2489 int ll_process_config(struct lustre_cfg *lcfg)
2490 {
2491         struct super_block *sb;
2492         unsigned long x;
2493         int rc = 0;
2494         char *ptr;
2495
2496         /* The instance name contains the sb: lustre-client-aacfe000 */
2497         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2498         if (!ptr || !*(++ptr))
2499                 return -EINVAL;
2500         if (sscanf(ptr, "%lx", &x) != 1)
2501                 return -EINVAL;
2502         sb = (struct super_block *)x;
2503         /* This better be a real Lustre superblock! */
2504         LASSERT(s2lsi(sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2505
2506         /* Note we have not called client_common_fill_super yet, so
2507            proc fns must be able to handle that! */
2508         rc = class_process_proc_seq_param(PARAM_LLITE, lprocfs_llite_obd_vars,
2509                                           lcfg, sb);
2510         if (rc > 0)
2511                 rc = 0;
2512         return rc;
2513 }
2514
2515 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2516 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2517                                        struct inode *i1, struct inode *i2,
2518                                        const char *name, int namelen,
2519                                        int mode, __u32 opc, void *data)
2520 {
2521         LASSERT(i1 != NULL);
2522
2523         if (namelen > ll_i2sbi(i1)->ll_namelen)
2524                 return ERR_PTR(-ENAMETOOLONG);
2525
2526         if (op_data == NULL)
2527                 OBD_ALLOC_PTR(op_data);
2528
2529         if (op_data == NULL)
2530                 return ERR_PTR(-ENOMEM);
2531
2532         ll_i2gids(op_data->op_suppgids, i1, i2);
2533         op_data->op_fid1 = *ll_inode2fid(i1);
2534         op_data->op_capa1 = ll_mdscapa_get(i1);
2535         if (S_ISDIR(i1->i_mode))
2536                 op_data->op_mea1 = ll_i2info(i1)->lli_lsm_md;
2537
2538         if (i2) {
2539                 op_data->op_fid2 = *ll_inode2fid(i2);
2540                 op_data->op_capa2 = ll_mdscapa_get(i2);
2541                 if (S_ISDIR(i2->i_mode))
2542                         op_data->op_mea2 = ll_i2info(i2)->lli_lsm_md;
2543         } else {
2544                 fid_zero(&op_data->op_fid2);
2545                 op_data->op_capa2 = NULL;
2546         }
2547
2548         if (ll_i2sbi(i1)->ll_flags & LL_SBI_64BIT_HASH)
2549                 op_data->op_cli_flags |= CLI_HASH64;
2550
2551         if (ll_need_32bit_api(ll_i2sbi(i1)))
2552                 op_data->op_cli_flags |= CLI_API32;
2553
2554         op_data->op_name = name;
2555         op_data->op_namelen = namelen;
2556         op_data->op_mode = mode;
2557         op_data->op_mod_time = cfs_time_current_sec();
2558         op_data->op_fsuid = current_fsuid();
2559         op_data->op_fsgid = current_fsgid();
2560         op_data->op_cap = cfs_curproc_cap_pack();
2561         op_data->op_bias = 0;
2562         op_data->op_cli_flags = 0;
2563         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2564              filename_is_volatile(name, namelen, NULL))
2565                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2566         op_data->op_mds = 0;
2567         op_data->op_data = data;
2568
2569         /* If the file is being opened after mknod() (normally due to NFS)
2570          * try to use the default stripe data from parent directory for
2571          * allocating OST objects.  Try to pass the parent FID to MDS. */
2572         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2573             !ll_i2info(i2)->lli_has_smd) {
2574                 struct ll_inode_info *lli = ll_i2info(i2);
2575
2576                 spin_lock(&lli->lli_lock);
2577                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2578                         op_data->op_fid1 = lli->lli_pfid;
2579                 spin_unlock(&lli->lli_lock);
2580                 /** We ignore parent's capability temporary. */
2581         }
2582
2583         /* When called by ll_setattr_raw, file is i1. */
2584         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2585                 op_data->op_bias |= MDS_DATA_MODIFIED;
2586
2587         return op_data;
2588 }
2589
2590 void ll_finish_md_op_data(struct md_op_data *op_data)
2591 {
2592         capa_put(op_data->op_capa1);
2593         capa_put(op_data->op_capa2);
2594         OBD_FREE_PTR(op_data);
2595 }
2596
2597 #ifdef HAVE_SUPEROPS_USE_DENTRY
2598 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2599 #else
2600 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2601 #endif
2602 {
2603         struct ll_sb_info *sbi;
2604
2605 #ifdef HAVE_SUPEROPS_USE_DENTRY
2606         LASSERT((seq != NULL) && (dentry != NULL));
2607         sbi = ll_s2sbi(dentry->d_sb);
2608 #else
2609         LASSERT((seq != NULL) && (vfs != NULL));
2610         sbi = ll_s2sbi(vfs->mnt_sb);
2611 #endif
2612
2613         if (sbi->ll_flags & LL_SBI_NOLCK)
2614                 seq_puts(seq, ",nolock");
2615
2616         if (sbi->ll_flags & LL_SBI_FLOCK)
2617                 seq_puts(seq, ",flock");
2618
2619         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2620                 seq_puts(seq, ",localflock");
2621
2622         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2623                 seq_puts(seq, ",user_xattr");
2624
2625         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2626                 seq_puts(seq, ",lazystatfs");
2627
2628         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2629                 seq_puts(seq, ",user_fid2path");
2630
2631         RETURN(0);
2632 }
2633
2634 /**
2635  * Get obd name by cmd, and copy out to user space
2636  */
2637 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2638 {
2639         struct ll_sb_info *sbi = ll_i2sbi(inode);
2640         struct obd_device *obd;
2641         ENTRY;
2642
2643         if (cmd == OBD_IOC_GETDTNAME)
2644                 obd = class_exp2obd(sbi->ll_dt_exp);
2645         else if (cmd == OBD_IOC_GETMDNAME)
2646                 obd = class_exp2obd(sbi->ll_md_exp);
2647         else
2648                 RETURN(-EINVAL);
2649
2650         if (!obd)
2651                 RETURN(-ENOENT);
2652
2653         if (copy_to_user((void *)arg, obd->obd_name,
2654                          strlen(obd->obd_name) + 1))
2655                 RETURN(-EFAULT);
2656
2657         RETURN(0);
2658 }
2659
2660 /**
2661  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2662  * fsname will be returned in this buffer; otherwise, a static buffer will be
2663  * used to store the fsname and returned to caller.
2664  */
2665 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2666 {
2667         static char fsname_static[MTI_NAME_MAXLEN];
2668         struct lustre_sb_info *lsi = s2lsi(sb);
2669         char *ptr;
2670         int len;
2671
2672         if (buf == NULL) {
2673                 /* this means the caller wants to use static buffer
2674                  * and it doesn't care about race. Usually this is
2675                  * in error reporting path */
2676                 buf = fsname_static;
2677                 buflen = sizeof(fsname_static);
2678         }
2679
2680         len = strlen(lsi->lsi_lmd->lmd_profile);
2681         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2682         if (ptr && (strcmp(ptr, "-client") == 0))
2683                 len -= 7;
2684
2685         if (unlikely(len >= buflen))
2686                 len = buflen - 1;
2687         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2688         buf[len] = '\0';
2689
2690         return buf;
2691 }
2692
2693 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2694 {
2695         char *path = NULL;
2696
2697         struct path p;
2698
2699         p.dentry = dentry;
2700         p.mnt = current->fs->root.mnt;
2701         path_get(&p);
2702         path = d_path(&p, buf, bufsize);
2703         path_put(&p);
2704         return path;
2705 }
2706
2707 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2708 {
2709         char *buf, *path = NULL;
2710         struct dentry *dentry = NULL;
2711         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2712
2713         /* this can be called inside spin lock so use GFP_ATOMIC. */
2714         buf = (char *)__get_free_page(GFP_ATOMIC);
2715         if (buf != NULL) {
2716                 dentry = d_find_alias(page->mapping->host);
2717                 if (dentry != NULL)
2718                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2719         }
2720
2721         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2722               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2723               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2724               PFID(&obj->cob_header.coh_lu.loh_fid),
2725               (path && !IS_ERR(path)) ? path : "", ioret);
2726
2727         if (dentry != NULL)
2728                 dput(dentry);
2729
2730         if (buf != NULL)
2731                 free_page((unsigned long)buf);
2732 }