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, 2012, 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 cfs_mem_cache_t *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         if (pages >> (20 - CFS_PAGE_SHIFT) < 512) {
  97                 lru_page_max = pages / 2;
  98         } else {
  99                 lru_page_max = (pages / 4) * 3;
 100         }
 101
 102         /* initialize lru data */
 103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 104         sbi->ll_cache.ccc_lru_max = lru_page_max;
 105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 108
 109         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 110                                            SBI_DEFAULT_READAHEAD_MAX);
 111         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 112         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 113                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 114         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 115         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 116
 117         ll_generate_random_uuid(uuid);
 118         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 119         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 120
 121         spin_lock(&ll_sb_lock);
 122         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 123         spin_unlock(&ll_sb_lock);
 124
 125         sbi->ll_flags |= LL_SBI_VERBOSE;
 126 #ifdef ENABLE_CHECKSUM
 127         sbi->ll_flags |= LL_SBI_CHECKSUM;
 128 #endif
 129
 130 #ifdef HAVE_LRU_RESIZE_SUPPORT
 131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 132 #endif
 133
 134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 135                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 136                                pp_r_hist.oh_lock);
 137                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 138                                pp_w_hist.oh_lock);
 139         }
 140
 141         /* metadata statahead is enabled by default */
 142         sbi->ll_sa_max = LL_SA_RPC_DEF;
 143         cfs_atomic_set(&sbi->ll_sa_total, 0);
 144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 145         cfs_atomic_set(&sbi->ll_agl_total, 0);
 146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 147
 148         RETURN(sbi);
 149 }
 150
 151 void ll_free_sbi(struct super_block *sb)
 152 {
 153         struct ll_sb_info *sbi = ll_s2sbi(sb);
 154         ENTRY;
 155
 156         if (sbi != NULL) {
 157                 spin_lock(&ll_sb_lock);
 158                 cfs_list_del(&sbi->ll_list);
 159                 spin_unlock(&ll_sb_lock);
 160                 OBD_FREE(sbi, sizeof(*sbi));
 161         }
 162         EXIT;
 163 }
 164
 165 static struct dentry_operations ll_d_root_ops = {
 166         .d_compare = ll_dcompare,
 167         .d_revalidate = ll_revalidate_nd,
 168 };
 169
 170 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 171                                     struct vfsmount *mnt)
 172 {
 173         struct inode *root = 0;
 174         struct ll_sb_info *sbi = ll_s2sbi(sb);
 175         struct obd_device *obd;
 176         struct obd_capa *oc = NULL;
 177         struct obd_statfs *osfs = NULL;
 178         struct ptlrpc_request *request = NULL;
 179         struct obd_connect_data *data = NULL;
 180         struct obd_uuid *uuid;
 181         struct md_op_data *op_data;
 182         struct lustre_md lmd;
 183         obd_valid valid;
 184         int size, err, checksum;
 185         ENTRY;
 186
 187         obd = class_name2obd(md);
 188         if (!obd) {
 189                 CERROR("MD %s: not setup or attached\n", md);
 190                 RETURN(-EINVAL);
 191         }
 192
 193         OBD_ALLOC_PTR(data);
 194         if (data == NULL)
 195                 RETURN(-ENOMEM);
 196
 197         OBD_ALLOC_PTR(osfs);
 198         if (osfs == NULL) {
 199                 OBD_FREE_PTR(data);
 200                 RETURN(-ENOMEM);
 201         }
 202
 203         if (proc_lustre_fs_root) {
 204                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 205                                                   dt, md);
 206                 if (err < 0)
 207                         CERROR("could not register mount in /proc/fs/lustre\n");
 208         }
 209
 210         /* indicate the features supported by this client */
 211         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 212                                   OBD_CONNECT_ATTRFID  |
 213                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 214                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 215                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 216                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 217                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 218                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 219                                   OBD_CONNECT_EINPROGRESS |
 220                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 221                                   OBD_CONNECT_LAYOUTLOCK;
 222
 223         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 224                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 225
 226 #ifdef HAVE_LRU_RESIZE_SUPPORT
 227         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 228                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 229 #endif
 230 #ifdef CONFIG_FS_POSIX_ACL
 231         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 232 #endif
 233
 234         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 235                 /* flag mdc connection as lightweight, only used for test
 236                  * purpose, use with care */
 237                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 238
 239         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 240         data->ocd_version = LUSTRE_VERSION_CODE;
 241
 242         if (sb->s_flags & MS_RDONLY)
 243                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 244         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 245                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 246
 247 #ifdef HAVE_MS_FLOCK_LOCK
 248         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 249         sb->s_flags |= MS_FLOCK_LOCK;
 250 #endif
 251 #ifdef MS_HAS_NEW_AOPS
 252         sb->s_flags |= MS_HAS_NEW_AOPS;
 253 #endif
 254
 255         if (sbi->ll_flags & LL_SBI_FLOCK)
 256                 sbi->ll_fop = &ll_file_operations_flock;
 257         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 258                 sbi->ll_fop = &ll_file_operations;
 259         else
 260                 sbi->ll_fop = &ll_file_operations_noflock;
 261
 262         /* real client */
 263         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 264         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 265                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 266
 267         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 268
 269         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 270         if (err == -EBUSY) {
 271                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 272                                    "recovery, of which this client is not a "
 273                                    "part. Please wait for recovery to complete,"
 274                                    " abort, or time out.\n", md);
 275                 GOTO(out, err);
 276         } else if (err) {
 277                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 278                 GOTO(out, 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, 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 = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
 298         if (sbi->ll_md_exp->exp_connect_flags != 0 &&
 299             valid != CLIENT_CONNECT_MDT_REQD) {
 300                 char *buf;
 301
 302                 OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
 303                 obd_connect_flags2str(buf, CFS_PAGE_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, CFS_PAGE_SIZE);
 311                 GOTO(out_md, 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, 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 = CFS_PAGE_SIZE;
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 383                 LCONSOLE_INFO("Layout lock feature supported.\n");
 384                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 385         }
 386
 387         obd = class_name2obd(dt);
 388         if (!obd) {
 389                 CERROR("DT %s: not setup or attached\n", dt);
 390                 GOTO(out_md, err = -ENODEV);
 391         }
 392
 393         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 394                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 395                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 396                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 397                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 398                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 399                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 400                                   OBD_CONNECT_MAXBYTES |
 401                                   OBD_CONNECT_EINPROGRESS |
 402                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 403                                   OBD_CONNECT_LAYOUTLOCK;
 404
 405         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 406                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 407
 408         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 409                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 410                  * disabled by default, because it can still be enabled on the
 411                  * fly via /proc. As a consequence, we still need to come to an
 412                  * agreement on the supported algorithms at connect time */
 413                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 414
 415                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 416                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 417                 else
 418                         data->ocd_cksum_types = cksum_types_supported_client();
 419         }
 420
 421 #ifdef HAVE_LRU_RESIZE_SUPPORT
 422         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 423 #endif
 424         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 425                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 426
 427         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 428                "ocd_grant: %d\n", data->ocd_connect_flags,
 429                data->ocd_version, data->ocd_grant);
 430
 431         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 432         obd->obd_upcall.onu_upcall = cl_ocd_update;
 433
 434         data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 435
 436         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 437                           NULL);
 438         if (err == -EBUSY) {
 439                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 440                                    "recovery, of which this client is not a "
 441                                    "part.  Please wait for recovery to "
 442                                    "complete, abort, or time out.\n", dt);
 443                 GOTO(out_md, err);
 444         } else if (err) {
 445                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 446                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 447                 GOTO(out_md, err);
 448         }
 449
 450         mutex_lock(&sbi->ll_lco.lco_lock);
 451         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 452         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 453         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 454         mutex_unlock(&sbi->ll_lco.lco_lock);
 455
 456         fid_zero(&sbi->ll_root_fid);
 457         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 458         if (err) {
 459                 CERROR("cannot mds_connect: rc = %d\n", err);
 460                 GOTO(out_dt, err);
 461         }
 462         if (!fid_is_sane(&sbi->ll_root_fid)) {
 463                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 464                        sbi->ll_md_exp->exp_obd->obd_name,
 465                        PFID(&sbi->ll_root_fid));
 466                 GOTO(out_dt, err = -EINVAL);
 467         }
 468         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 469
 470         sb->s_op = &lustre_super_operations;
 471 #if THREAD_SIZE >= 8192 /*b=17630*/
 472         sb->s_export_op = &lustre_export_operations;
 473 #endif
 474
 475         /* make root inode
 476          * XXX: move this to after cbd setup? */
 477         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 478         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 479                 valid |= OBD_MD_FLRMTPERM;
 480         else if (sbi->ll_flags & LL_SBI_ACL)
 481                 valid |= OBD_MD_FLACL;
 482
 483         OBD_ALLOC_PTR(op_data);
 484         if (op_data == NULL)
 485                 GOTO(out_dt, err = -ENOMEM);
 486
 487         op_data->op_fid1 = sbi->ll_root_fid;
 488         op_data->op_mode = 0;
 489         op_data->op_capa1 = oc;
 490         op_data->op_valid = valid;
 491
 492         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 493         if (oc)
 494                 capa_put(oc);
 495         OBD_FREE_PTR(op_data);
 496         if (err) {
 497                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 498                        sbi->ll_md_exp->exp_obd->obd_name, err);
 499                 GOTO(out_dt, err);
 500         }
 501
 502         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 503                                sbi->ll_md_exp, &lmd);
 504         if (err) {
 505                 CERROR("failed to understand root inode md: rc = %d\n", err);
 506                 ptlrpc_req_finished(request);
 507                 GOTO(out_dt, err);
 508         }
 509
 510         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 511         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
 512         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 513         ptlrpc_req_finished(request);
 514
 515         if (root == NULL || IS_ERR(root)) {
 516                 if (lmd.lsm)
 517                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 518 #ifdef CONFIG_FS_POSIX_ACL
 519                 if (lmd.posix_acl) {
 520                         posix_acl_release(lmd.posix_acl);
 521                         lmd.posix_acl = NULL;
 522                 }
 523 #endif
 524                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 525                 root = NULL;
 526                 CERROR("lustre_lite: bad iget4 for root\n");
 527                 GOTO(out_root, err);
 528         }
 529
 530         err = ll_close_thread_start(&sbi->ll_lcq);
 531         if (err) {
 532                 CERROR("cannot start close thread: rc %d\n", err);
 533                 GOTO(out_root, err);
 534         }
 535
 536 #ifdef CONFIG_FS_POSIX_ACL
 537         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 538                 rct_init(&sbi->ll_rct);
 539                 et_init(&sbi->ll_et);
 540         }
 541 #endif
 542
 543         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 544         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 545                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 546                                  NULL);
 547         cl_sb_init(sb);
 548
 549         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 550                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 551                                  &sbi->ll_cache, NULL);
 552
 553         sb->s_root = d_make_root(root);
 554         if (sb->s_root == NULL) {
 555                 CERROR("%s: can't make root dentry\n",
 556                         ll_get_fsname(sb, NULL, 0));
 557                 GOTO(out_root, err = -ENOMEM);
 558         }
 559
 560 #ifdef HAVE_DCACHE_LOCK
 561         sb->s_root->d_op = &ll_d_root_ops;
 562 #else
 563         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 564         d_set_d_op(sb->s_root, &ll_d_root_ops);
 565         sb->s_d_op = &ll_d_ops;
 566 #endif
 567
 568         sbi->ll_sdev_orig = sb->s_dev;
 569
 570         /* We set sb->s_dev equal on all lustre clients in order to support
 571          * NFS export clustering.  NFSD requires that the FSID be the same
 572          * on all clients. */
 573         /* s_dev is also used in lt_compare() to compare two fs, but that is
 574          * only a node-local comparison. */
 575         uuid = obd_get_uuid(sbi->ll_md_exp);
 576         if (uuid != NULL)
 577                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 578
 579         if (data != NULL)
 580                 OBD_FREE_PTR(data);
 581         if (osfs != NULL)
 582                 OBD_FREE_PTR(osfs);
 583
 584         RETURN(err);
 585 out_root:
 586         if (root)
 587                 iput(root);
 588 out_dt:
 589         obd_disconnect(sbi->ll_dt_exp);
 590         sbi->ll_dt_exp = NULL;
 591         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 592         obd_zombie_barrier();
 593 out_md:
 594         obd_disconnect(sbi->ll_md_exp);
 595         sbi->ll_md_exp = NULL;
 596 out:
 597         if (data != NULL)
 598                 OBD_FREE_PTR(data);
 599         if (osfs != NULL)
 600                 OBD_FREE_PTR(osfs);
 601         lprocfs_unregister_mountpoint(sbi);
 602         return err;
 603 }
 604
 605 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 606 {
 607         int size, rc;
 608
 609         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 610         size = sizeof(int);
 611         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 612                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 613         if (rc)
 614                 CERROR("Get max mdsize error rc %d \n", rc);
 615
 616         RETURN(rc);
 617 }
 618
 619 void ll_dump_inode(struct inode *inode)
 620 {
 621         struct ll_d_hlist_node *tmp;
 622         int dentry_count = 0;
 623
 624         LASSERT(inode != NULL);
 625
 626         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 627                 dentry_count++;
 628
 629         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 630                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 631                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 632 }
 633
 634 void lustre_dump_dentry(struct dentry *dentry, int recur)
 635 {
 636         struct list_head *tmp;
 637         int subdirs = 0;
 638
 639         LASSERT(dentry != NULL);
 640
 641         list_for_each(tmp, &dentry->d_subdirs)
 642                 subdirs++;
 643
 644         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 645                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 646                dentry->d_name.len, dentry->d_name.name,
 647                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 648                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 649                dentry->d_flags, dentry->d_fsdata, subdirs);
 650         if (dentry->d_inode != NULL)
 651                 ll_dump_inode(dentry->d_inode);
 652
 653         if (recur == 0)
 654                 return;
 655
 656         list_for_each(tmp, &dentry->d_subdirs) {
 657                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 658                 lustre_dump_dentry(d, recur - 1);
 659         }
 660 }
 661
 662 void client_common_put_super(struct super_block *sb)
 663 {
 664         struct ll_sb_info *sbi = ll_s2sbi(sb);
 665         ENTRY;
 666
 667 #ifdef CONFIG_FS_POSIX_ACL
 668         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 669                 et_fini(&sbi->ll_et);
 670                 rct_fini(&sbi->ll_rct);
 671         }
 672 #endif
 673
 674         ll_close_thread_shutdown(sbi->ll_lcq);
 675
 676         cl_sb_fini(sb);
 677
 678         cfs_list_del(&sbi->ll_conn_chain);
 679
 680         obd_disconnect(sbi->ll_dt_exp);
 681         sbi->ll_dt_exp = NULL;
 682         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 683          * see LU-2543. */
 684         obd_zombie_barrier();
 685
 686         lprocfs_unregister_mountpoint(sbi);
 687
 688         obd_disconnect(sbi->ll_md_exp);
 689         sbi->ll_md_exp = NULL;
 690
 691         EXIT;
 692 }
 693
 694 void ll_kill_super(struct super_block *sb)
 695 {
 696         struct ll_sb_info *sbi;
 697
 698         ENTRY;
 699
 700         /* not init sb ?*/
 701         if (!(sb->s_flags & MS_ACTIVE))
 702                 return;
 703
 704         sbi = ll_s2sbi(sb);
 705         /* we need restore s_dev from changed for clustred NFS before put_super
 706          * because new kernels have cached s_dev and change sb->s_dev in
 707          * put_super not affected real removing devices */
 708         if (sbi)
 709                 sb->s_dev = sbi->ll_sdev_orig;
 710         EXIT;
 711 }
 712
 713 char *ll_read_opt(const char *opt, char *data)
 714 {
 715         char *value;
 716         char *retval;
 717         ENTRY;
 718
 719         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 720         if (strncmp(opt, data, strlen(opt)))
 721                 RETURN(NULL);
 722         if ((value = strchr(data, '=')) == NULL)
 723                 RETURN(NULL);
 724
 725         value++;
 726         OBD_ALLOC(retval, strlen(value) + 1);
 727         if (!retval) {
 728                 CERROR("out of memory!\n");
 729                 RETURN(NULL);
 730         }
 731
 732         memcpy(retval, value, strlen(value)+1);
 733         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 734         RETURN(retval);
 735 }
 736
 737 static inline int ll_set_opt(const char *opt, char *data, int fl)
 738 {
 739         if (strncmp(opt, data, strlen(opt)) != 0)
 740                 return(0);
 741         else
 742                 return(fl);
 743 }
 744
 745 /* non-client-specific mount options are parsed in lmd_parse */
 746 static int ll_options(char *options, int *flags)
 747 {
 748         int tmp;
 749         char *s1 = options, *s2;
 750         ENTRY;
 751
 752         if (!options)
 753                 RETURN(0);
 754
 755         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 756
 757         while (*s1) {
 758                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 759                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 760                 if (tmp) {
 761                         *flags |= tmp;
 762                         goto next;
 763                 }
 764                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 765                 if (tmp) {
 766                         *flags |= tmp;
 767                         goto next;
 768                 }
 769                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 770                 if (tmp) {
 771                         *flags |= tmp;
 772                         goto next;
 773                 }
 774                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 775                 if (tmp) {
 776                         *flags &= ~tmp;
 777                         goto next;
 778                 }
 779                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 780                 if (tmp) {
 781                         *flags |= tmp;
 782                         goto next;
 783                 }
 784                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 785                 if (tmp) {
 786                         *flags &= ~tmp;
 787                         goto next;
 788                 }
 789 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 790                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 791                 if (tmp) {
 792                         /* Ignore deprecated mount option.  The client will
 793                          * always try to mount with ACL support, whether this
 794                          * is used depends on whether server supports it. */
 795                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 796                                                   "mount option 'acl'.\n");
 797                         goto next;
 798                 }
 799                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 800                 if (tmp) {
 801                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 802                                                   "mount option 'noacl'.\n");
 803                         goto next;
 804                 }
 805 #else
 806 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 807 #endif
 808                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 809                 if (tmp) {
 810                         *flags |= tmp;
 811                         goto next;
 812                 }
 813                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 814                 if (tmp) {
 815                         *flags |= tmp;
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 819                 if (tmp) {
 820                         *flags &= ~tmp;
 821                         goto next;
 822                 }
 823
 824                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 825                 if (tmp) {
 826                         *flags |= tmp;
 827                         goto next;
 828                 }
 829                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 830                 if (tmp) {
 831                         *flags &= ~tmp;
 832                         goto next;
 833                 }
 834                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 835                 if (tmp) {
 836                         *flags |= tmp;
 837                         goto next;
 838                 }
 839                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 840                 if (tmp) {
 841                         *flags &= ~tmp;
 842                         goto next;
 843                 }
 844                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 845                 if (tmp) {
 846                         *flags |= tmp;
 847                         goto next;
 848                 }
 849                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 850                 if (tmp) {
 851                         *flags &= ~tmp;
 852                         goto next;
 853                 }
 854                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 855                 if (tmp) {
 856                         *flags |= tmp;
 857                         goto next;
 858                 }
 859                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 860                 if (tmp) {
 861                         *flags |= tmp;
 862                         goto next;
 863                 }
 864                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 865                 if (tmp) {
 866                         *flags |= tmp;
 867                         goto next;
 868                 }
 869                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 870                 if (tmp) {
 871                         *flags &= ~tmp;
 872                         goto next;
 873                 }
 874                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 875                                    s1);
 876                 RETURN(-EINVAL);
 877
 878 next:
 879                 /* Find next opt */
 880                 s2 = strchr(s1, ',');
 881                 if (s2 == NULL)
 882                         break;
 883                 s1 = s2 + 1;
 884         }
 885         RETURN(0);
 886 }
 887
 888 void ll_lli_init(struct ll_inode_info *lli)
 889 {
 890         lli->lli_inode_magic = LLI_INODE_MAGIC;
 891         lli->lli_flags = 0;
 892         lli->lli_ioepoch = 0;
 893         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 894         spin_lock_init(&lli->lli_lock);
 895         lli->lli_posix_acl = NULL;
 896         lli->lli_remote_perms = NULL;
 897         mutex_init(&lli->lli_rmtperm_mutex);
 898         /* Do not set lli_fid, it has been initialized already. */
 899         fid_zero(&lli->lli_pfid);
 900         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 901         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 902         cfs_atomic_set(&lli->lli_open_count, 0);
 903         lli->lli_mds_capa = NULL;
 904         lli->lli_rmtperm_time = 0;
 905         lli->lli_pending_och = NULL;
 906         lli->lli_mds_read_och = NULL;
 907         lli->lli_mds_write_och = NULL;
 908         lli->lli_mds_exec_och = NULL;
 909         lli->lli_open_fd_read_count = 0;
 910         lli->lli_open_fd_write_count = 0;
 911         lli->lli_open_fd_exec_count = 0;
 912         mutex_init(&lli->lli_och_mutex);
 913         spin_lock_init(&lli->lli_agl_lock);
 914         lli->lli_has_smd = false;
 915         lli->lli_layout_gen = LL_LAYOUT_GEN_ZERO;
 916         lli->lli_clob = NULL;
 917
 918         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 919         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 920                 mutex_init(&lli->lli_readdir_mutex);
 921                 lli->lli_opendir_key = NULL;
 922                 lli->lli_sai = NULL;
 923                 lli->lli_def_acl = NULL;
 924                 spin_lock_init(&lli->lli_sa_lock);
 925                 lli->lli_opendir_pid = 0;
 926         } else {
 927                 sema_init(&lli->lli_size_sem, 1);
 928                 lli->lli_size_sem_owner = NULL;
 929                 lli->lli_symlink_name = NULL;
 930                 init_rwsem(&lli->lli_trunc_sem);
 931                 mutex_init(&lli->lli_write_mutex);
 932                 init_rwsem(&lli->lli_glimpse_sem);
 933                 lli->lli_glimpse_time = 0;
 934                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 935                 lli->lli_agl_index = 0;
 936                 lli->lli_async_rc = 0;
 937                 lli->lli_volatile = false;
 938         }
 939         mutex_init(&lli->lli_layout_mutex);
 940 }
 941
 942 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 943 {
 944 #ifdef HAVE_BDI_REGISTER
 945         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 946
 947 #ifdef HAVE_BDI_NAME
 948         bdi->name = "lustre";
 949 #endif
 950         return bdi_register(bdi, NULL, "lustre-%d",
 951                             atomic_inc_return(&ll_bdi_num));
 952 #else
 953         return 0;
 954 #endif
 955 }
 956
 957 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 958 {
 959         struct lustre_profile *lprof = NULL;
 960         struct lustre_sb_info *lsi = s2lsi(sb);
 961         struct ll_sb_info *sbi;
 962         char  *dt = NULL, *md = NULL;
 963         char  *profilenm = get_profile_name(sb);
 964         struct config_llog_instance *cfg;
 965         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 966         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 967         int    err;
 968         ENTRY;
 969
 970         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 971
 972         OBD_ALLOC_PTR(cfg);
 973         if (cfg == NULL)
 974                 RETURN(-ENOMEM);
 975
 976         cfs_module_get();
 977
 978         /* client additional sb info */
 979         lsi->lsi_llsbi = sbi = ll_init_sbi();
 980         if (!sbi) {
 981                 cfs_module_put(THIS_MODULE);
 982                 OBD_FREE_PTR(cfg);
 983                 RETURN(-ENOMEM);
 984         }
 985
 986         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 987         if (err)
 988                 GOTO(out_free, err);
 989
 990         err = bdi_init(&lsi->lsi_bdi);
 991         if (err)
 992                 GOTO(out_free, err);
 993         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 994         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
 995         err = ll_bdi_register(&lsi->lsi_bdi);
 996         if (err)
 997                 GOTO(out_free, err);
 998
 999 #ifdef HAVE_SB_BDI
1000         sb->s_bdi = &lsi->lsi_bdi;
1001 #endif
1002
1003         /* Generate a string unique to this super, in case some joker tries
1004            to mount the same fs at two mount points.
1005            Use the address of the super itself.*/
1006         cfg->cfg_instance = sb;
1007         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1008         cfg->cfg_callback = class_config_llog_handler;
1009         /* set up client obds */
1010         err = lustre_process_log(sb, profilenm, cfg);
1011         if (err < 0) {
1012                 CERROR("Unable to process log: %d\n", err);
1013                 GOTO(out_free, err);
1014         }
1015
1016         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1017         lprof = class_get_profile(profilenm);
1018         if (lprof == NULL) {
1019                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1020                                    " read from the MGS.  Does that filesystem "
1021                                    "exist?\n", profilenm);
1022                 GOTO(out_free, err = -EINVAL);
1023         }
1024         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1025                lprof->lp_md, lprof->lp_dt);
1026
1027         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1028         if (!dt)
1029                 GOTO(out_free, err = -ENOMEM);
1030         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1031
1032         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1033         if (!md)
1034                 GOTO(out_free, err = -ENOMEM);
1035         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1036
1037         /* connections, registrations, sb setup */
1038         err = client_common_fill_super(sb, md, dt, mnt);
1039
1040 out_free:
1041         if (md)
1042                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1043         if (dt)
1044                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1045         if (err)
1046                 ll_put_super(sb);
1047         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1048                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1049
1050         OBD_FREE_PTR(cfg);
1051         RETURN(err);
1052 } /* ll_fill_super */
1053
1054
1055 void lu_context_keys_dump(void);
1056
1057 void ll_put_super(struct super_block *sb)
1058 {
1059         struct config_llog_instance cfg;
1060         struct obd_device *obd;
1061         struct lustre_sb_info *lsi = s2lsi(sb);
1062         struct ll_sb_info *sbi = ll_s2sbi(sb);
1063         char *profilenm = get_profile_name(sb);
1064         int force = 1, next;
1065         ENTRY;
1066
1067         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1068
1069         ll_print_capa_stat(sbi);
1070
1071         cfg.cfg_instance = sb;
1072         lustre_end_log(sb, profilenm, &cfg);
1073
1074         if (sbi->ll_md_exp) {
1075                 obd = class_exp2obd(sbi->ll_md_exp);
1076                 if (obd)
1077                         force = obd->obd_force;
1078         }
1079
1080         /* We need to set force before the lov_disconnect in
1081            lustre_common_put_super, since l_d cleans up osc's as well. */
1082         if (force) {
1083                 next = 0;
1084                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1085                                                      &next)) != NULL) {
1086                         obd->obd_force = force;
1087                 }
1088         }
1089
1090         if (sbi->ll_lcq) {
1091                 /* Only if client_common_fill_super succeeded */
1092                 client_common_put_super(sb);
1093         }
1094
1095         next = 0;
1096         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1097                 class_manual_cleanup(obd);
1098         }
1099
1100         if (sbi->ll_flags & LL_SBI_VERBOSE)
1101                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1102
1103         if (profilenm)
1104                 class_del_profile(profilenm);
1105
1106         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1107                 bdi_destroy(&lsi->lsi_bdi);
1108                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1109         }
1110
1111         ll_free_sbi(sb);
1112         lsi->lsi_llsbi = NULL;
1113
1114         lustre_common_put_super(sb);
1115
1116         cl_env_cache_purge(~0);
1117
1118         cfs_module_put(THIS_MODULE);
1119
1120         EXIT;
1121 } /* client_put_super */
1122
1123 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1124 {
1125         struct inode *inode = NULL;
1126         /* NOTE: we depend on atomic igrab() -bzzz */
1127         lock_res_and_lock(lock);
1128         if (lock->l_ast_data) {
1129                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1130                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1131                         inode = igrab(lock->l_ast_data);
1132                 } else {
1133                         inode = lock->l_ast_data;
1134                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1135                                          D_WARNING, lock, "l_ast_data %p is "
1136                                          "bogus: magic %08x", lock->l_ast_data,
1137                                          lli->lli_inode_magic);
1138                         inode = NULL;
1139                 }
1140         }
1141         unlock_res_and_lock(lock);
1142         return inode;
1143 }
1144
1145 static int null_if_equal(struct ldlm_lock *lock, void *data)
1146 {
1147         if (data == lock->l_ast_data) {
1148                 lock->l_ast_data = NULL;
1149
1150                 if (lock->l_req_mode != lock->l_granted_mode)
1151                         LDLM_ERROR(lock,"clearing inode with ungranted lock");
1152         }
1153
1154         return LDLM_ITER_CONTINUE;
1155 }
1156
1157 void ll_clear_inode(struct inode *inode)
1158 {
1159         struct ll_inode_info *lli = ll_i2info(inode);
1160         struct ll_sb_info *sbi = ll_i2sbi(inode);
1161         ENTRY;
1162
1163         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1164                inode->i_generation, inode);
1165
1166         if (S_ISDIR(inode->i_mode)) {
1167                 /* these should have been cleared in ll_file_release */
1168                 LASSERT(lli->lli_opendir_key == NULL);
1169                 LASSERT(lli->lli_sai == NULL);
1170                 LASSERT(lli->lli_opendir_pid == 0);
1171         }
1172
1173         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1174         md_change_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
1175                          null_if_equal, inode);
1176
1177         LASSERT(!lli->lli_open_fd_write_count);
1178         LASSERT(!lli->lli_open_fd_read_count);
1179         LASSERT(!lli->lli_open_fd_exec_count);
1180
1181         if (lli->lli_mds_write_och)
1182                 ll_md_real_close(inode, FMODE_WRITE);
1183         if (lli->lli_mds_exec_och)
1184                 ll_md_real_close(inode, FMODE_EXEC);
1185         if (lli->lli_mds_read_och)
1186                 ll_md_real_close(inode, FMODE_READ);
1187
1188         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1189                 OBD_FREE(lli->lli_symlink_name,
1190                          strlen(lli->lli_symlink_name) + 1);
1191                 lli->lli_symlink_name = NULL;
1192         }
1193
1194         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1195                 LASSERT(lli->lli_posix_acl == NULL);
1196                 if (lli->lli_remote_perms) {
1197                         free_rmtperm_hash(lli->lli_remote_perms);
1198                         lli->lli_remote_perms = NULL;
1199                 }
1200         }
1201 #ifdef CONFIG_FS_POSIX_ACL
1202         else if (lli->lli_posix_acl) {
1203                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1204                 LASSERT(lli->lli_remote_perms == NULL);
1205                 posix_acl_release(lli->lli_posix_acl);
1206                 lli->lli_posix_acl = NULL;
1207         }
1208 #endif
1209         lli->lli_inode_magic = LLI_INODE_DEAD;
1210
1211         ll_clear_inode_capas(inode);
1212         if (!S_ISDIR(inode->i_mode))
1213                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1214
1215         /*
1216          * XXX This has to be done before lsm is freed below, because
1217          * cl_object still uses inode lsm.
1218          */
1219         cl_inode_fini(inode);
1220         lli->lli_has_smd = false;
1221
1222         EXIT;
1223 }
1224
1225 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1226                   struct md_open_data **mod)
1227 {
1228         struct lustre_md md;
1229         struct inode *inode = dentry->d_inode;
1230         struct ll_sb_info *sbi = ll_i2sbi(inode);
1231         struct ptlrpc_request *request = NULL;
1232         int rc, ia_valid;
1233         ENTRY;
1234
1235         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1236                                      LUSTRE_OPC_ANY, NULL);
1237         if (IS_ERR(op_data))
1238                 RETURN(PTR_ERR(op_data));
1239
1240         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1241                         &request, mod);
1242         if (rc) {
1243                 ptlrpc_req_finished(request);
1244                 if (rc == -ENOENT) {
1245                         clear_nlink(inode);
1246                         /* Unlinked special device node? Or just a race?
1247                          * Pretend we done everything. */
1248                         if (!S_ISREG(inode->i_mode) &&
1249                             !S_ISDIR(inode->i_mode)) {
1250                                 ia_valid = op_data->op_attr.ia_valid;
1251                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1252                                 rc = simple_setattr(dentry, &op_data->op_attr);
1253                                 op_data->op_attr.ia_valid = ia_valid;
1254                         }
1255                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1256                         CERROR("md_setattr fails: rc = %d\n", rc);
1257                 }
1258                 RETURN(rc);
1259         }
1260
1261         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1262                               sbi->ll_md_exp, &md);
1263         if (rc) {
1264                 ptlrpc_req_finished(request);
1265                 RETURN(rc);
1266         }
1267
1268         /* We want to adjust timestamps.
1269          * If there is at least some data in file, we cleared ATTR_SIZE
1270          * to avoid update size, otherwise it is important to do.(SOM case)
1271          * (bug 6196) */
1272         ia_valid = op_data->op_attr.ia_valid;
1273         /* Since we set ATTR_*_SET flags above, and already done permission
1274          * check, So don't let inode_change_ok() check it again.  */
1275         op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1276         rc = simple_setattr(dentry, &op_data->op_attr);
1277         op_data->op_attr.ia_valid = ia_valid;
1278
1279         /* Extract epoch data if obtained. */
1280         op_data->op_handle = md.body->handle;
1281         op_data->op_ioepoch = md.body->ioepoch;
1282
1283         ll_update_inode(inode, &md);
1284         ptlrpc_req_finished(request);
1285
1286         RETURN(rc);
1287 }
1288
1289 /* Close IO epoch and send Size-on-MDS attribute update. */
1290 static int ll_setattr_done_writing(struct inode *inode,
1291                                    struct md_op_data *op_data,
1292                                    struct md_open_data *mod)
1293 {
1294         struct ll_inode_info *lli = ll_i2info(inode);
1295         int rc = 0;
1296         ENTRY;
1297
1298         LASSERT(op_data != NULL);
1299         if (!S_ISREG(inode->i_mode))
1300                 RETURN(0);
1301
1302         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1303                op_data->op_ioepoch, PFID(&lli->lli_fid));
1304
1305         op_data->op_flags = MF_EPOCH_CLOSE;
1306         ll_done_writing_attr(inode, op_data);
1307         ll_pack_inode2opdata(inode, op_data, NULL);
1308
1309         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1310         if (rc == -EAGAIN) {
1311                 /* MDS has instructed us to obtain Size-on-MDS attribute
1312                  * from OSTs and send setattr to back to MDS. */
1313                 rc = ll_som_update(inode, op_data);
1314         } else if (rc) {
1315                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1316                        inode->i_ino, rc);
1317         }
1318         RETURN(rc);
1319 }
1320
1321 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1322 {
1323         struct obd_capa *capa;
1324         int rc;
1325
1326         if (attr->ia_valid & ATTR_SIZE)
1327                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1328         else
1329                 capa = ll_mdscapa_get(inode);
1330
1331         rc = cl_setattr_ost(inode, attr, capa);
1332
1333         if (attr->ia_valid & ATTR_SIZE)
1334                 ll_truncate_free_capa(capa);
1335         else
1336                 capa_put(capa);
1337
1338         return rc;
1339 }
1340
1341 #ifndef HAVE_VFS_INODE_NEWSIZE_OK
1342 /**
1343  * inode_newsize_ok - may this inode be truncated to a given size
1344  * @inode:      the inode to be truncated
1345  * @offset:     the new size to assign to the inode
1346  * @Returns:    0 on success, -ve errno on failure
1347  *
1348  * inode_newsize_ok will check filesystem limits and ulimits to check that the
1349  * new inode size is within limits. inode_newsize_ok will also send SIGXFSZ
1350  * when necessary. Caller must not proceed with inode size change if failure is
1351  * returned. @inode must be a file (not directory), with appropriate
1352  * permissions to allow truncate (inode_newsize_ok does NOT check these
1353  * conditions).
1354  *
1355  * inode_newsize_ok must be called with i_mutex held.
1356  */
1357 int inode_newsize_ok(const struct inode *inode, loff_t offset)
1358 {
1359         if (inode->i_size < offset) {
1360                 unsigned long limit;
1361
1362                 limit = rlimit(RLIMIT_FSIZE);
1363                 if (limit != RLIM_INFINITY && offset > limit)
1364                         goto out_sig;
1365                 if (offset > inode->i_sb->s_maxbytes)
1366                         goto out_big;
1367         } else {
1368                 /*
1369                  * truncation of in-use swapfiles is disallowed - it would
1370                  * cause subsequent swapout to scribble on the now-freed
1371                  * blocks.
1372                  */
1373                 if (IS_SWAPFILE(inode))
1374                         return -ETXTBSY;
1375         }
1376
1377         return 0;
1378 out_sig:
1379         send_sig(SIGXFSZ, current, 0);
1380 out_big:
1381         return -EFBIG;
1382 }
1383 #endif
1384
1385 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1386  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1387  * keep these values until such a time that objects are allocated for it.
1388  * We do the MDS operations first, as it is checking permissions for us.
1389  * We don't to the MDS RPC if there is nothing that we want to store there,
1390  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1391  * going to do an RPC anyways.
1392  *
1393  * If we are doing a truncate, we will send the mtime and ctime updates
1394  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1395  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1396  * at the same time.
1397  */
1398 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1399 {
1400         struct lov_stripe_md *lsm;
1401         struct inode *inode = dentry->d_inode;
1402         struct ll_inode_info *lli = ll_i2info(inode);
1403         struct md_op_data *op_data = NULL;
1404         struct md_open_data *mod = NULL;
1405         int ia_valid = attr->ia_valid;
1406         int rc = 0, rc1 = 0;
1407         ENTRY;
1408
1409         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1410                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1411                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1412                 attr->ia_valid);
1413
1414         if (ia_valid & ATTR_SIZE) {
1415                 /* Check new size against VFS/VM file size limit and rlimit */
1416                 rc = inode_newsize_ok(inode, attr->ia_size);
1417                 if (rc)
1418                         RETURN(rc);
1419
1420                 /* The maximum Lustre file size is variable, based on the
1421                  * OST maximum object size and number of stripes.  This
1422                  * needs another check in addition to the VFS check above. */
1423                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1424                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1425                                PFID(&lli->lli_fid), attr->ia_size,
1426                                ll_file_maxbytes(inode));
1427                         RETURN(-EFBIG);
1428                 }
1429
1430                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1431         }
1432
1433         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1434         if (ia_valid & TIMES_SET_FLAGS) {
1435                 if (cfs_curproc_fsuid() != inode->i_uid &&
1436                     !cfs_capable(CFS_CAP_FOWNER))
1437                         RETURN(-EPERM);
1438         }
1439
1440         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1441         if (attr->ia_valid & ATTR_CTIME) {
1442                 attr->ia_ctime = CFS_CURRENT_TIME;
1443                 attr->ia_valid |= ATTR_CTIME_SET;
1444         }
1445         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
1446                 attr->ia_atime = CFS_CURRENT_TIME;
1447                 attr->ia_valid |= ATTR_ATIME_SET;
1448         }
1449         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
1450                 attr->ia_mtime = CFS_CURRENT_TIME;
1451                 attr->ia_valid |= ATTR_MTIME_SET;
1452         }
1453
1454         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1455                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1456                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1457                        cfs_time_current_sec());
1458
1459         /* If we are changing file size, file content is modified, flag it. */
1460         if (attr->ia_valid & ATTR_SIZE) {
1461                 spin_lock(&lli->lli_lock);
1462                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1463                 spin_unlock(&lli->lli_lock);
1464         }
1465
1466         /* We always do an MDS RPC, even if we're only changing the size;
1467          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1468
1469         OBD_ALLOC_PTR(op_data);
1470         if (op_data == NULL)
1471                 RETURN(-ENOMEM);
1472
1473         if (!S_ISDIR(inode->i_mode)) {
1474                 if (ia_valid & ATTR_SIZE)
1475                         inode_dio_write_done(inode);
1476                 mutex_unlock(&inode->i_mutex);
1477                 down_write(&lli->lli_trunc_sem);
1478         }
1479
1480         /* We need a steady stripe configuration for setattr to avoid
1481          * confusion. */
1482         lsm = ccc_inode_lsm_get(inode);
1483
1484         /* NB: ATTR_SIZE will only be set after this point if the size
1485          * resides on the MDS, ie, this file has no objects. */
1486         if (lsm != NULL)
1487                 attr->ia_valid &= ~ATTR_SIZE;
1488         /* can't call ll_setattr_ost() while holding a refcount of lsm */
1489         ccc_inode_lsm_put(inode, lsm);
1490
1491         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1492
1493         /* Open epoch for truncate. */
1494         if (exp_connect_som(ll_i2mdexp(inode)) &&
1495             (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1496                 op_data->op_flags = MF_EPOCH_OPEN;
1497
1498         rc = ll_md_setattr(dentry, op_data, &mod);
1499         if (rc)
1500                 GOTO(out, rc);
1501
1502         /* RPC to MDT is sent, cancel data modification flag */
1503         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1504                 spin_lock(&lli->lli_lock);
1505                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1506                 spin_unlock(&lli->lli_lock);
1507         }
1508
1509         ll_ioepoch_open(lli, op_data->op_ioepoch);
1510         if (!S_ISREG(inode->i_mode))
1511                 GOTO(out, rc = 0);
1512
1513         if (ia_valid & ATTR_SIZE)
1514                 attr->ia_valid |= ATTR_SIZE;
1515         if (ia_valid & (ATTR_SIZE |
1516                         ATTR_ATIME | ATTR_ATIME_SET |
1517                         ATTR_MTIME | ATTR_MTIME_SET))
1518                 /* For truncate and utimes sending attributes to OSTs, setting
1519                  * mtime/atime to the past will be performed under PW [0:EOF]
1520                  * extent lock (new_size:EOF for truncate).  It may seem
1521                  * excessive to send mtime/atime updates to OSTs when not
1522                  * setting times to past, but it is necessary due to possible
1523                  * time de-synchronization between MDT inode and OST objects */
1524                 rc = ll_setattr_ost(inode, attr);
1525         EXIT;
1526 out:
1527         if (op_data) {
1528                 if (op_data->op_ioepoch) {
1529                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1530                         if (!rc)
1531                                 rc = rc1;
1532                 }
1533                 ll_finish_md_op_data(op_data);
1534         }
1535         if (!S_ISDIR(inode->i_mode)) {
1536                 up_write(&lli->lli_trunc_sem);
1537                 mutex_lock(&inode->i_mutex);
1538                 if (ia_valid & ATTR_SIZE)
1539                         inode_dio_wait(inode);
1540         }
1541
1542         ll_stats_ops_tally(ll_i2sbi(inode), (ia_valid & ATTR_SIZE) ?
1543                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1544
1545         return rc;
1546 }
1547
1548 int ll_setattr(struct dentry *de, struct iattr *attr)
1549 {
1550         int mode = de->d_inode->i_mode;
1551
1552         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1553                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1554                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1555
1556         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1557                                (ATTR_SIZE|ATTR_MODE)) &&
1558             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1559              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1560               !(attr->ia_mode & S_ISGID))))
1561                 attr->ia_valid |= ATTR_FORCE;
1562
1563         if ((mode & S_ISUID) &&
1564             !(attr->ia_mode & S_ISUID) &&
1565             !(attr->ia_valid & ATTR_KILL_SUID))
1566                 attr->ia_valid |= ATTR_KILL_SUID;
1567
1568         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1569             !(attr->ia_mode & S_ISGID) &&
1570             !(attr->ia_valid & ATTR_KILL_SGID))
1571                 attr->ia_valid |= ATTR_KILL_SGID;
1572
1573         return ll_setattr_raw(de, attr);
1574 }
1575
1576 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1577                        __u64 max_age, __u32 flags)
1578 {
1579         struct ll_sb_info *sbi = ll_s2sbi(sb);
1580         struct obd_statfs obd_osfs;
1581         int rc;
1582         ENTRY;
1583
1584         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1585         if (rc) {
1586                 CERROR("md_statfs fails: rc = %d\n", rc);
1587                 RETURN(rc);
1588         }
1589
1590         osfs->os_type = sb->s_magic;
1591
1592         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1593                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1594
1595         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1596                 flags |= OBD_STATFS_NODELAY;
1597
1598         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1599         if (rc) {
1600                 CERROR("obd_statfs fails: rc = %d\n", rc);
1601                 RETURN(rc);
1602         }
1603
1604         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1605                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1606                obd_osfs.os_files);
1607
1608         osfs->os_bsize = obd_osfs.os_bsize;
1609         osfs->os_blocks = obd_osfs.os_blocks;
1610         osfs->os_bfree = obd_osfs.os_bfree;
1611         osfs->os_bavail = obd_osfs.os_bavail;
1612
1613         /* If we don't have as many objects free on the OST as inodes
1614          * on the MDS, we reduce the total number of inodes to
1615          * compensate, so that the "inodes in use" number is correct.
1616          */
1617         if (obd_osfs.os_ffree < osfs->os_ffree) {
1618                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1619                         obd_osfs.os_ffree;
1620                 osfs->os_ffree = obd_osfs.os_ffree;
1621         }
1622
1623         RETURN(rc);
1624 }
1625 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1626 {
1627         struct super_block *sb = de->d_sb;
1628         struct obd_statfs osfs;
1629         int rc;
1630
1631         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1632         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1633
1634         /* Some amount of caching on the client is allowed */
1635         rc = ll_statfs_internal(sb, &osfs,
1636                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1637                                 0);
1638         if (rc)
1639                 return rc;
1640
1641         statfs_unpack(sfs, &osfs);
1642
1643         /* We need to downshift for all 32-bit kernels, because we can't
1644          * tell if the kernel is being called via sys_statfs64() or not.
1645          * Stop before overflowing f_bsize - in which case it is better
1646          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1647         if (sizeof(long) < 8) {
1648                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1649                         sfs->f_bsize <<= 1;
1650
1651                         osfs.os_blocks >>= 1;
1652                         osfs.os_bfree >>= 1;
1653                         osfs.os_bavail >>= 1;
1654                 }
1655         }
1656
1657         sfs->f_blocks = osfs.os_blocks;
1658         sfs->f_bfree = osfs.os_bfree;
1659         sfs->f_bavail = osfs.os_bavail;
1660
1661         return 0;
1662 }
1663
1664 void ll_inode_size_lock(struct inode *inode)
1665 {
1666         struct ll_inode_info *lli;
1667
1668         LASSERT(!S_ISDIR(inode->i_mode));
1669
1670         lli = ll_i2info(inode);
1671         LASSERT(lli->lli_size_sem_owner != current);
1672         down(&lli->lli_size_sem);
1673         LASSERT(lli->lli_size_sem_owner == NULL);
1674         lli->lli_size_sem_owner = current;
1675 }
1676
1677 void ll_inode_size_unlock(struct inode *inode)
1678 {
1679         struct ll_inode_info *lli;
1680
1681         lli = ll_i2info(inode);
1682         LASSERT(lli->lli_size_sem_owner == current);
1683         lli->lli_size_sem_owner = NULL;
1684         up(&lli->lli_size_sem);
1685 }
1686
1687 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1688 {
1689         struct ll_inode_info *lli = ll_i2info(inode);
1690         struct mdt_body *body = md->body;
1691         struct lov_stripe_md *lsm = md->lsm;
1692         struct ll_sb_info *sbi = ll_i2sbi(inode);
1693
1694         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1695         if (lsm != NULL) {
1696                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1697                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1698                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1699         }
1700
1701         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1702                 if (body->valid & OBD_MD_FLRMTPERM)
1703                         ll_update_remote_perm(inode, md->remote_perm);
1704         }
1705 #ifdef CONFIG_FS_POSIX_ACL
1706         else if (body->valid & OBD_MD_FLACL) {
1707                 spin_lock(&lli->lli_lock);
1708                 if (lli->lli_posix_acl)
1709                         posix_acl_release(lli->lli_posix_acl);
1710                 lli->lli_posix_acl = md->posix_acl;
1711                 spin_unlock(&lli->lli_lock);
1712         }
1713 #endif
1714         inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
1715         inode->i_generation = cl_fid_build_gen(&body->fid1);
1716
1717         if (body->valid & OBD_MD_FLATIME) {
1718                 if (body->atime > LTIME_S(inode->i_atime))
1719                         LTIME_S(inode->i_atime) = body->atime;
1720                 lli->lli_lvb.lvb_atime = body->atime;
1721         }
1722         if (body->valid & OBD_MD_FLMTIME) {
1723                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1724                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1725                                "to "LPU64"\n", inode->i_ino,
1726                                LTIME_S(inode->i_mtime), body->mtime);
1727                         LTIME_S(inode->i_mtime) = body->mtime;
1728                 }
1729                 lli->lli_lvb.lvb_mtime = body->mtime;
1730         }
1731         if (body->valid & OBD_MD_FLCTIME) {
1732                 if (body->ctime > LTIME_S(inode->i_ctime))
1733                         LTIME_S(inode->i_ctime) = body->ctime;
1734                 lli->lli_lvb.lvb_ctime = body->ctime;
1735         }
1736         if (body->valid & OBD_MD_FLMODE)
1737                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1738         if (body->valid & OBD_MD_FLTYPE)
1739                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1740         LASSERT(inode->i_mode != 0);
1741         if (S_ISREG(inode->i_mode)) {
1742                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1743         } else {
1744                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1745         }
1746         if (body->valid & OBD_MD_FLUID)
1747                 inode->i_uid = body->uid;
1748         if (body->valid & OBD_MD_FLGID)
1749                 inode->i_gid = body->gid;
1750         if (body->valid & OBD_MD_FLFLAGS)
1751                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1752         if (body->valid & OBD_MD_FLNLINK)
1753                 set_nlink(inode, body->nlink);
1754         if (body->valid & OBD_MD_FLRDEV)
1755                 inode->i_rdev = old_decode_dev(body->rdev);
1756
1757         if (body->valid & OBD_MD_FLID) {
1758                 /* FID shouldn't be changed! */
1759                 if (fid_is_sane(&lli->lli_fid)) {
1760                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1761                                  "Trying to change FID "DFID
1762                                  " to the "DFID", inode %lu/%u(%p)\n",
1763                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1764                                  inode->i_ino, inode->i_generation, inode);
1765                 } else
1766                         lli->lli_fid = body->fid1;
1767         }
1768
1769         LASSERT(fid_seq(&lli->lli_fid) != 0);
1770
1771         if (body->valid & OBD_MD_FLSIZE) {
1772                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1773                     S_ISREG(inode->i_mode) && lli->lli_has_smd) {
1774                         struct lustre_handle lockh;
1775                         ldlm_mode_t mode;
1776
1777                         /* As it is possible a blocking ast has been processed
1778                          * by this time, we need to check there is an UPDATE
1779                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1780                          * it. */
1781                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1782                                                &lockh, LDLM_FL_CBPENDING);
1783                         if (mode) {
1784                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1785                                                       LLIF_EPOCH_PENDING |
1786                                                       LLIF_SOM_DIRTY)) {
1787                                         CERROR("ino %lu flags %u still has "
1788                                                "size authority! do not trust "
1789                                                "the size got from MDS\n",
1790                                                inode->i_ino, lli->lli_flags);
1791                                 } else {
1792                                         /* Use old size assignment to avoid
1793                                          * deadlock bz14138 & bz14326 */
1794                                         i_size_write(inode, body->size);
1795                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1796                                 }
1797                                 ldlm_lock_decref(&lockh, mode);
1798                         }
1799                 } else {
1800                         /* Use old size assignment to avoid
1801                          * deadlock bz14138 & bz14326 */
1802                         i_size_write(inode, body->size);
1803
1804                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1805                                inode->i_ino, (unsigned long long)body->size);
1806                 }
1807
1808                 if (body->valid & OBD_MD_FLBLOCKS)
1809                         inode->i_blocks = body->blocks;
1810         }
1811
1812         if (body->valid & OBD_MD_FLMDSCAPA) {
1813                 LASSERT(md->mds_capa);
1814                 ll_add_capa(inode, md->mds_capa);
1815         }
1816         if (body->valid & OBD_MD_FLOSSCAPA) {
1817                 LASSERT(md->oss_capa);
1818                 ll_add_capa(inode, md->oss_capa);
1819         }
1820 }
1821
1822 void ll_read_inode2(struct inode *inode, void *opaque)
1823 {
1824         struct lustre_md *md = opaque;
1825         struct ll_inode_info *lli = ll_i2info(inode);
1826         ENTRY;
1827
1828         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1829                PFID(&lli->lli_fid), inode);
1830
1831         LASSERT(!lli->lli_has_smd);
1832
1833         /* Core attributes from the MDS first.  This is a new inode, and
1834          * the VFS doesn't zero times in the core inode so we have to do
1835          * it ourselves.  They will be overwritten by either MDS or OST
1836          * attributes - we just need to make sure they aren't newer. */
1837         LTIME_S(inode->i_mtime) = 0;
1838         LTIME_S(inode->i_atime) = 0;
1839         LTIME_S(inode->i_ctime) = 0;
1840         inode->i_rdev = 0;
1841         ll_update_inode(inode, md);
1842
1843         /* OIDEBUG(inode); */
1844
1845         /* initializing backing dev info. */
1846         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1847
1848
1849         if (S_ISREG(inode->i_mode)) {
1850                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1851                 inode->i_op = &ll_file_inode_operations;
1852                 inode->i_fop = sbi->ll_fop;
1853                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1854                 EXIT;
1855         } else if (S_ISDIR(inode->i_mode)) {
1856                 inode->i_op = &ll_dir_inode_operations;
1857                 inode->i_fop = &ll_dir_operations;
1858                 EXIT;
1859         } else if (S_ISLNK(inode->i_mode)) {
1860                 inode->i_op = &ll_fast_symlink_inode_operations;
1861                 EXIT;
1862         } else {
1863                 inode->i_op = &ll_special_inode_operations;
1864
1865                 init_special_inode(inode, inode->i_mode,
1866                                    inode->i_rdev);
1867
1868                 EXIT;
1869         }
1870 }
1871
1872 void ll_delete_inode(struct inode *inode)
1873 {
1874         struct cl_inode_info *lli = cl_i2info(inode);
1875         ENTRY;
1876
1877         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1878                 /* discard all dirty pages before truncating them, required by
1879                  * osc_extent implementation at LU-1030. */
1880                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF, CL_FSYNC_DISCARD);
1881
1882         truncate_inode_pages(&inode->i_data, 0);
1883
1884         /* Workaround for LU-118 */
1885         if (inode->i_data.nrpages) {
1886                 TREE_READ_LOCK_IRQ(&inode->i_data);
1887                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1888                 LASSERTF(inode->i_data.nrpages == 0,
1889                          "inode=%lu/%u(%p) nrpages=%lu, see "
1890                          "http://jira.whamcloud.com/browse/LU-118\n",
1891                          inode->i_ino, inode->i_generation, inode,
1892                          inode->i_data.nrpages);
1893         }
1894         /* Workaround end */
1895
1896 #ifdef HAVE_SBOPS_EVICT_INODE
1897         ll_clear_inode(inode);
1898 #endif
1899         clear_inode(inode);
1900
1901         EXIT;
1902 }
1903
1904 int ll_iocontrol(struct inode *inode, struct file *file,
1905                  unsigned int cmd, unsigned long arg)
1906 {
1907         struct ll_sb_info *sbi = ll_i2sbi(inode);
1908         struct ptlrpc_request *req = NULL;
1909         int rc, flags = 0;
1910         ENTRY;
1911
1912         switch(cmd) {
1913         case FSFILT_IOC_GETFLAGS: {
1914                 struct mdt_body *body;
1915                 struct md_op_data *op_data;
1916
1917                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1918                                              0, 0, LUSTRE_OPC_ANY,
1919                                              NULL);
1920                 if (IS_ERR(op_data))
1921                         RETURN(PTR_ERR(op_data));
1922
1923                 op_data->op_valid = OBD_MD_FLFLAGS;
1924                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1925                 ll_finish_md_op_data(op_data);
1926                 if (rc) {
1927                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1928                         RETURN(-abs(rc));
1929                 }
1930
1931                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1932
1933                 flags = body->flags;
1934
1935                 ptlrpc_req_finished(req);
1936
1937                 RETURN(put_user(flags, (int *)arg));
1938         }
1939         case FSFILT_IOC_SETFLAGS: {
1940                 struct lov_stripe_md *lsm;
1941                 struct obd_info oinfo = { { { 0 } } };
1942                 struct md_op_data *op_data;
1943
1944                 if (get_user(flags, (int *)arg))
1945                         RETURN(-EFAULT);
1946
1947                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1948                                              LUSTRE_OPC_ANY, NULL);
1949                 if (IS_ERR(op_data))
1950                         RETURN(PTR_ERR(op_data));
1951
1952                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1953                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1954                 rc = md_setattr(sbi->ll_md_exp, op_data,
1955                                 NULL, 0, NULL, 0, &req, NULL);
1956                 ll_finish_md_op_data(op_data);
1957                 ptlrpc_req_finished(req);
1958                 if (rc)
1959                         RETURN(rc);
1960
1961                 inode->i_flags = ll_ext_to_inode_flags(flags);
1962
1963                 lsm = ccc_inode_lsm_get(inode);
1964                 if (lsm == NULL)
1965                         RETURN(0);
1966
1967                 OBDO_ALLOC(oinfo.oi_oa);
1968                 if (!oinfo.oi_oa) {
1969                         ccc_inode_lsm_put(inode, lsm);
1970                         RETURN(-ENOMEM);
1971                 }
1972                 oinfo.oi_md = lsm;
1973                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
1974                 oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
1975                 oinfo.oi_oa->o_flags = flags;
1976                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1977                                        OBD_MD_FLGROUP;
1978                 oinfo.oi_capa = ll_mdscapa_get(inode);
1979                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1980                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1981                 capa_put(oinfo.oi_capa);
1982                 OBDO_FREE(oinfo.oi_oa);
1983                 ccc_inode_lsm_put(inode, lsm);
1984
1985                 if (rc && rc != -EPERM && rc != -EACCES)
1986                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1987
1988                 RETURN(rc);
1989         }
1990         default:
1991                 RETURN(-ENOSYS);
1992         }
1993
1994         RETURN(0);
1995 }
1996
1997 int ll_flush_ctx(struct inode *inode)
1998 {
1999         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2000
2001         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2002
2003         obd_set_info_async(NULL, sbi->ll_md_exp,
2004                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2005                            0, NULL, NULL);
2006         obd_set_info_async(NULL, sbi->ll_dt_exp,
2007                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2008                            0, NULL, NULL);
2009         return 0;
2010 }
2011
2012 /* umount -f client means force down, don't save state */
2013 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2014 void ll_umount_begin(struct vfsmount *vfsmnt, int flags)
2015 {
2016         struct super_block *sb = vfsmnt->mnt_sb;
2017 #else
2018 void ll_umount_begin(struct super_block *sb)
2019 {
2020 #endif
2021         struct ll_sb_info *sbi = ll_s2sbi(sb);
2022         struct obd_device *obd;
2023         struct obd_ioctl_data *ioc_data;
2024         ENTRY;
2025
2026 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2027         if (!(flags & MNT_FORCE)) {
2028                 EXIT;
2029                 return;
2030         }
2031 #endif
2032
2033         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2034                sb->s_count, atomic_read(&sb->s_active));
2035
2036         obd = class_exp2obd(sbi->ll_md_exp);
2037         if (obd == NULL) {
2038                 CERROR("Invalid MDC connection handle "LPX64"\n",
2039                        sbi->ll_md_exp->exp_handle.h_cookie);
2040                 EXIT;
2041                 return;
2042         }
2043         obd->obd_force = 1;
2044
2045         obd = class_exp2obd(sbi->ll_dt_exp);
2046         if (obd == NULL) {
2047                 CERROR("Invalid LOV connection handle "LPX64"\n",
2048                        sbi->ll_dt_exp->exp_handle.h_cookie);
2049                 EXIT;
2050                 return;
2051         }
2052         obd->obd_force = 1;
2053
2054         OBD_ALLOC_PTR(ioc_data);
2055         if (ioc_data) {
2056                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2057                               sizeof ioc_data, ioc_data, NULL);
2058
2059                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2060                               sizeof ioc_data, ioc_data, NULL);
2061
2062                 OBD_FREE_PTR(ioc_data);
2063         }
2064
2065
2066         /* Really, we'd like to wait until there are no requests outstanding,
2067          * and then continue.  For now, we just invalidate the requests,
2068          * schedule() and sleep one second if needed, and hope.
2069          */
2070         cfs_schedule();
2071 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
2072         if (atomic_read(&vfsmnt->mnt_count) > 2) {
2073                 cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
2074                                                    cfs_time_seconds(1));
2075                 if (atomic_read(&vfsmnt->mnt_count) > 2)
2076                         LCONSOLE_WARN("Mount still busy with %d refs! You "
2077                                       "may try to umount it a bit later\n",
2078                                       atomic_read(&vfsmnt->mnt_count));
2079         }
2080 #endif
2081
2082         EXIT;
2083 }
2084
2085 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2086 {
2087         struct ll_sb_info *sbi = ll_s2sbi(sb);
2088         char *profilenm = get_profile_name(sb);
2089         int err;
2090         __u32 read_only;
2091
2092         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2093                 read_only = *flags & MS_RDONLY;
2094                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2095                                          sizeof(KEY_READ_ONLY),
2096                                          KEY_READ_ONLY, sizeof(read_only),
2097                                          &read_only, NULL);
2098                 if (err) {
2099                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2100                                       profilenm, read_only ?
2101                                       "read-only" : "read-write", err);
2102                         return err;
2103                 }
2104
2105                 if (read_only)
2106                         sb->s_flags |= MS_RDONLY;
2107                 else
2108                         sb->s_flags &= ~MS_RDONLY;
2109
2110                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2111                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2112                                       read_only ?  "read-only" : "read-write");
2113         }
2114         return 0;
2115 }
2116
2117 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2118                   struct super_block *sb, struct lookup_intent *it)
2119 {
2120         struct ll_sb_info *sbi = NULL;
2121         struct lustre_md md;
2122         int rc;
2123         ENTRY;
2124
2125         LASSERT(*inode || sb);
2126         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2127         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2128                               sbi->ll_md_exp, &md);
2129         if (rc)
2130                 RETURN(rc);
2131
2132         if (*inode) {
2133                 ll_update_inode(*inode, &md);
2134         } else {
2135                 LASSERT(sb != NULL);
2136
2137                 /*
2138                  * At this point server returns to client's same fid as client
2139                  * generated for creating. So using ->fid1 is okay here.
2140                  */
2141                 LASSERT(fid_is_sane(&md.body->fid1));
2142
2143                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
2144                 if (*inode == NULL || IS_ERR(*inode)) {
2145 #ifdef CONFIG_FS_POSIX_ACL
2146                         if (md.posix_acl) {
2147                                 posix_acl_release(md.posix_acl);
2148                                 md.posix_acl = NULL;
2149                         }
2150 #endif
2151                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2152                         *inode = NULL;
2153                         CERROR("new_inode -fatal: rc %d\n", rc);
2154                         GOTO(out, rc);
2155                 }
2156         }
2157
2158         /* Handling piggyback layout lock.
2159          * Layout lock can be piggybacked by getattr and open request.
2160          * The lsm can be applied to inode only if it comes with a layout lock
2161          * otherwise correct layout may be overwritten, for example:
2162          * 1. proc1: mdt returns a lsm but not granting layout
2163          * 2. layout was changed by another client
2164          * 3. proc2: refresh layout and layout lock granted
2165          * 4. proc1: to apply a stale layout */
2166         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2167                 struct lustre_handle lockh;
2168                 struct ldlm_lock *lock;
2169
2170                 lockh.cookie = it->d.lustre.it_lock_handle;
2171                 lock = ldlm_handle2lock(&lockh);
2172                 LASSERT(lock != NULL);
2173                 if (ldlm_has_layout(lock)) {
2174                         struct cl_object_conf conf;
2175
2176                         memset(&conf, 0, sizeof(conf));
2177                         conf.coc_opc = OBJECT_CONF_SET;
2178                         conf.coc_inode = *inode;
2179                         conf.coc_lock = lock;
2180                         conf.u.coc_md = &md;
2181                         (void)ll_layout_conf(*inode, &conf);
2182                 }
2183                 LDLM_LOCK_PUT(lock);
2184         }
2185
2186 out:
2187         if (md.lsm != NULL)
2188                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2189         md_free_lustre_md(sbi->ll_md_exp, &md);
2190         RETURN(rc);
2191 }
2192
2193 int ll_obd_statfs(struct inode *inode, void *arg)
2194 {
2195         struct ll_sb_info *sbi = NULL;
2196         struct obd_export *exp;
2197         char *buf = NULL;
2198         struct obd_ioctl_data *data = NULL;
2199         __u32 type;
2200         __u32 flags;
2201         int len = 0, rc;
2202
2203         if (!inode || !(sbi = ll_i2sbi(inode)))
2204                 GOTO(out_statfs, rc = -EINVAL);
2205
2206         rc = obd_ioctl_getdata(&buf, &len, arg);
2207         if (rc)
2208                 GOTO(out_statfs, rc);
2209
2210         data = (void*)buf;
2211         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2212             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2213                 GOTO(out_statfs, rc = -EINVAL);
2214
2215         if (data->ioc_inllen1 != sizeof(__u32) ||
2216             data->ioc_inllen2 != sizeof(__u32) ||
2217             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2218             data->ioc_plen2 != sizeof(struct obd_uuid))
2219                 GOTO(out_statfs, rc = -EINVAL);
2220
2221         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2222         if (type & LL_STATFS_LMV)
2223                 exp = sbi->ll_md_exp;
2224         else if (type & LL_STATFS_LOV)
2225                 exp = sbi->ll_dt_exp;
2226         else
2227                 GOTO(out_statfs, rc = -ENODEV);
2228
2229         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2230         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2231         if (rc)
2232                 GOTO(out_statfs, rc);
2233 out_statfs:
2234         if (buf)
2235                 obd_ioctl_freedata(buf, len);
2236         return rc;
2237 }
2238
2239 int ll_process_config(struct lustre_cfg *lcfg)
2240 {
2241         char *ptr;
2242         void *sb;
2243         struct lprocfs_static_vars lvars;
2244         unsigned long x;
2245         int rc = 0;
2246
2247         lprocfs_llite_init_vars(&lvars);
2248
2249         /* The instance name contains the sb: lustre-client-aacfe000 */
2250         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2251         if (!ptr || !*(++ptr))
2252                 return -EINVAL;
2253         if (sscanf(ptr, "%lx", &x) != 1)
2254                 return -EINVAL;
2255         sb = (void *)x;
2256         /* This better be a real Lustre superblock! */
2257         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2258
2259         /* Note we have not called client_common_fill_super yet, so
2260            proc fns must be able to handle that! */
2261         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2262                                       lcfg, sb);
2263         if (rc > 0)
2264                 rc = 0;
2265         return(rc);
2266 }
2267
2268 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2269 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2270                                        struct inode *i1, struct inode *i2,
2271                                        const char *name, int namelen,
2272                                        int mode, __u32 opc, void *data)
2273 {
2274         LASSERT(i1 != NULL);
2275
2276         if (namelen > ll_i2sbi(i1)->ll_namelen)
2277                 return ERR_PTR(-ENAMETOOLONG);
2278
2279         if (op_data == NULL)
2280                 OBD_ALLOC_PTR(op_data);
2281
2282         if (op_data == NULL)
2283                 return ERR_PTR(-ENOMEM);
2284
2285         ll_i2gids(op_data->op_suppgids, i1, i2);
2286         op_data->op_fid1 = *ll_inode2fid(i1);
2287         op_data->op_capa1 = ll_mdscapa_get(i1);
2288
2289         if (i2) {
2290                 op_data->op_fid2 = *ll_inode2fid(i2);
2291                 op_data->op_capa2 = ll_mdscapa_get(i2);
2292         } else {
2293                 fid_zero(&op_data->op_fid2);
2294                 op_data->op_capa2 = NULL;
2295         }
2296
2297         op_data->op_name = name;
2298         op_data->op_namelen = namelen;
2299         op_data->op_mode = mode;
2300         op_data->op_mod_time = cfs_time_current_sec();
2301         op_data->op_fsuid = cfs_curproc_fsuid();
2302         op_data->op_fsgid = cfs_curproc_fsgid();
2303         op_data->op_cap = cfs_curproc_cap_pack();
2304         op_data->op_bias = 0;
2305         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2306              filename_is_volatile(name, namelen, NULL))
2307                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2308         op_data->op_opc = opc;
2309         op_data->op_mds = 0;
2310         op_data->op_data = data;
2311
2312         /* If the file is being opened after mknod() (normally due to NFS)
2313          * try to use the default stripe data from parent directory for
2314          * allocating OST objects.  Try to pass the parent FID to MDS. */
2315         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2316             !ll_i2info(i2)->lli_has_smd) {
2317                 struct ll_inode_info *lli = ll_i2info(i2);
2318
2319                 spin_lock(&lli->lli_lock);
2320                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2321                         op_data->op_fid1 = lli->lli_pfid;
2322                 spin_unlock(&lli->lli_lock);
2323                 /** We ignore parent's capability temporary. */
2324         }
2325
2326         /* When called by ll_setattr_raw, file is i1. */
2327         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2328                 op_data->op_bias |= MDS_DATA_MODIFIED;
2329
2330         return op_data;
2331 }
2332
2333 void ll_finish_md_op_data(struct md_op_data *op_data)
2334 {
2335         capa_put(op_data->op_capa1);
2336         capa_put(op_data->op_capa2);
2337         OBD_FREE_PTR(op_data);
2338 }
2339
2340 #ifdef HAVE_SUPEROPS_USE_DENTRY
2341 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2342 #else
2343 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2344 #endif
2345 {
2346         struct ll_sb_info *sbi;
2347
2348 #ifdef HAVE_SUPEROPS_USE_DENTRY
2349         LASSERT((seq != NULL) && (dentry != NULL));
2350         sbi = ll_s2sbi(dentry->d_sb);
2351 #else
2352         LASSERT((seq != NULL) && (vfs != NULL));
2353         sbi = ll_s2sbi(vfs->mnt_sb);
2354 #endif
2355
2356         if (sbi->ll_flags & LL_SBI_NOLCK)
2357                 seq_puts(seq, ",nolock");
2358
2359         if (sbi->ll_flags & LL_SBI_FLOCK)
2360                 seq_puts(seq, ",flock");
2361
2362         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2363                 seq_puts(seq, ",localflock");
2364
2365         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2366                 seq_puts(seq, ",user_xattr");
2367
2368         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2369                 seq_puts(seq, ",lazystatfs");
2370
2371         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2372                 seq_puts(seq, ",user_fid2path");
2373
2374         RETURN(0);
2375 }
2376
2377 /**
2378  * Get obd name by cmd, and copy out to user space
2379  */
2380 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2381 {
2382         struct ll_sb_info *sbi = ll_i2sbi(inode);
2383         struct obd_device *obd;
2384         ENTRY;
2385
2386         if (cmd == OBD_IOC_GETDTNAME)
2387                 obd = class_exp2obd(sbi->ll_dt_exp);
2388         else if (cmd == OBD_IOC_GETMDNAME)
2389                 obd = class_exp2obd(sbi->ll_md_exp);
2390         else
2391                 RETURN(-EINVAL);
2392
2393         if (!obd)
2394                 RETURN(-ENOENT);
2395
2396         if (cfs_copy_to_user((void *)arg, obd->obd_name,
2397                              strlen(obd->obd_name) + 1))
2398                 RETURN(-EFAULT);
2399
2400         RETURN(0);
2401 }
2402
2403 /**
2404  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2405  * fsname will be returned in this buffer; otherwise, a static buffer will be
2406  * used to store the fsname and returned to caller.
2407  */
2408 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2409 {
2410         static char fsname_static[MTI_NAME_MAXLEN];
2411         struct lustre_sb_info *lsi = s2lsi(sb);
2412         char *ptr;
2413         int len;
2414
2415         if (buf == NULL) {
2416                 /* this means the caller wants to use static buffer
2417                  * and it doesn't care about race. Usually this is
2418                  * in error reporting path */
2419                 buf = fsname_static;
2420                 buflen = sizeof(fsname_static);
2421         }
2422
2423         len = strlen(lsi->lsi_lmd->lmd_profile);
2424         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2425         if (ptr && (strcmp(ptr, "-client") == 0))
2426                 len -= 7;
2427
2428         if (unlikely(len >= buflen))
2429                 len = buflen - 1;
2430         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2431         buf[len] = '\0';
2432
2433         return buf;
2434 }
2435
2436 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2437 {
2438         char *path = NULL;
2439
2440 #ifdef HAVE_FS_STRUCT_USE_PATH
2441         struct path p;
2442
2443         p.dentry = dentry;
2444         p.mnt = current->fs->root.mnt;
2445         path_get(&p);
2446         path = d_path(&p, buf, bufsize);
2447         path_put(&p);
2448 #else
2449         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2450 #endif
2451
2452         return path;
2453 }
2454
2455 void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
2456 {
2457         char *buf, *path = NULL;
2458         struct dentry *dentry = NULL;
2459         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2460
2461         /* this can be called inside spin lock so use GFP_ATOMIC. */
2462         buf = (char *)__get_free_page(GFP_ATOMIC);
2463         if (buf != NULL) {
2464                 dentry = d_find_alias(page->mapping->host);
2465                 if (dentry != NULL)
2466                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2467         }
2468
2469         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2470               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2471               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2472               PFID(&obj->cob_header.coh_lu.loh_fid),
2473               (path && !IS_ERR(path)) ? path : "", ioret);
2474
2475         if (dentry != NULL)
2476                 dput(dentry);
2477
2478         if (buf != NULL)
2479                 free_page((unsigned long)buf);
2480 }