drivers/staging/lustre/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/mm.h>
  46
  47 #include <lustre_lite.h>
  48 #include <lustre_ha.h>
  49 #include <lustre_dlm.h>
  50 #include <lprocfs_status.h>
  51 #include <lustre_disk.h>
  52 #include <lustre_param.h>
  53 #include <lustre_log.h>
  54 #include <cl_object.h>
  55 #include <obd_cksum.h>
  56 #include "llite_internal.h"
  57
  58 struct kmem_cache *ll_file_data_slab;
  59
  60 LIST_HEAD(ll_super_blocks);
  61 DEFINE_SPINLOCK(ll_sb_lock);
  62
  63 #ifndef MS_HAS_NEW_AOPS
  64 extern struct address_space_operations ll_aops;
  65 #else
  66 extern struct address_space_operations_ext ll_aops;
  67 #endif
  68
  69 #ifndef log2
  70 #define log2(n) ffz(~(n))
  71 #endif
  72
  73 static struct ll_sb_info *ll_init_sbi(void)
  74 {
  75         struct ll_sb_info *sbi = NULL;
  76         unsigned long pages;
  77         unsigned long lru_page_max;
  78         struct sysinfo si;
  79         class_uuid_t uuid;
  80         int i;
  81
  82         OBD_ALLOC(sbi, sizeof(*sbi));
  83         if (!sbi)
  84                 return NULL;
  85
  86         spin_lock_init(&sbi->ll_lock);
  87         mutex_init(&sbi->ll_lco.lco_lock);
  88         spin_lock_init(&sbi->ll_pp_extent_lock);
  89         spin_lock_init(&sbi->ll_process_lock);
  90         sbi->ll_rw_stats_on = 0;
  91
  92         si_meminfo(&si);
  93         pages = si.totalram - si.totalhigh;
  94         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
  95                 lru_page_max = pages / 2;
  96         } else {
  97                 lru_page_max = (pages / 4) * 3;
  98         }
  99
 100         /* initialize lru data */
 101         atomic_set(&sbi->ll_cache.ccc_users, 0);
 102         sbi->ll_cache.ccc_lru_max = lru_page_max;
 103         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 104         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 105         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 106
 107         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 108                                            SBI_DEFAULT_READAHEAD_MAX);
 109         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 110         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 111                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 112         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 113         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 114
 115         ll_generate_random_uuid(uuid);
 116         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 117         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 118
 119         spin_lock(&ll_sb_lock);
 120         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 121         spin_unlock(&ll_sb_lock);
 122
 123         sbi->ll_flags |= LL_SBI_VERBOSE;
 124         sbi->ll_flags |= LL_SBI_CHECKSUM;
 125
 126         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 127
 128         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 129                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 130                                pp_r_hist.oh_lock);
 131                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 132                                pp_w_hist.oh_lock);
 133         }
 134
 135         /* metadata statahead is enabled by default */
 136         sbi->ll_sa_max = LL_SA_RPC_DEF;
 137         atomic_set(&sbi->ll_sa_total, 0);
 138         atomic_set(&sbi->ll_sa_wrong, 0);
 139         atomic_set(&sbi->ll_agl_total, 0);
 140         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 141
 142         return sbi;
 143 }
 144
 145 void ll_free_sbi(struct super_block *sb)
 146 {
 147         struct ll_sb_info *sbi = ll_s2sbi(sb);
 148
 149         if (sbi != NULL) {
 150                 spin_lock(&ll_sb_lock);
 151                 list_del(&sbi->ll_list);
 152                 spin_unlock(&ll_sb_lock);
 153                 OBD_FREE(sbi, sizeof(*sbi));
 154         }
 155 }
 156
 157 static struct dentry_operations ll_d_root_ops = {
 158         .d_compare = ll_dcompare,
 159         .d_revalidate = ll_revalidate_nd,
 160 };
 161
 162 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 163                                     struct vfsmount *mnt)
 164 {
 165         struct inode *root = 0;
 166         struct ll_sb_info *sbi = ll_s2sbi(sb);
 167         struct obd_device *obd;
 168         struct obd_capa *oc = NULL;
 169         struct obd_statfs *osfs = NULL;
 170         struct ptlrpc_request *request = NULL;
 171         struct obd_connect_data *data = NULL;
 172         struct obd_uuid *uuid;
 173         struct md_op_data *op_data;
 174         struct lustre_md lmd;
 175         obd_valid valid;
 176         int size, err, checksum;
 177
 178         obd = class_name2obd(md);
 179         if (!obd) {
 180                 CERROR("MD %s: not setup or attached\n", md);
 181                 return -EINVAL;
 182         }
 183
 184         OBD_ALLOC_PTR(data);
 185         if (data == NULL)
 186                 return -ENOMEM;
 187
 188         OBD_ALLOC_PTR(osfs);
 189         if (osfs == NULL) {
 190                 OBD_FREE_PTR(data);
 191                 return -ENOMEM;
 192         }
 193
 194         if (proc_lustre_fs_root) {
 195                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 196                                                   dt, md);
 197                 if (err < 0)
 198                         CERROR("could not register mount in /proc/fs/lustre\n");
 199         }
 200
 201         /* indicate the features supported by this client */
 202         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 203                                   OBD_CONNECT_ATTRFID  |
 204                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 205                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 206                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 207                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 208                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 209                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 210                                   OBD_CONNECT_EINPROGRESS |
 211                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 212                                   OBD_CONNECT_LAYOUTLOCK |
 213                                   OBD_CONNECT_PINGLESS | OBD_CONNECT_MAX_EASIZE;
 214
 215         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 216                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 217
 218         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 219                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 220 #ifdef CONFIG_FS_POSIX_ACL
 221         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 222 #endif
 223
 224         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 225                 /* flag mdc connection as lightweight, only used for test
 226                  * purpose, use with care */
 227                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 228
 229         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 230         data->ocd_version = LUSTRE_VERSION_CODE;
 231
 232         if (sb->s_flags & MS_RDONLY)
 233                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 234         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 235                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 236
 237 #ifdef HAVE_MS_FLOCK_LOCK
 238         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 239         sb->s_flags |= MS_FLOCK_LOCK;
 240 #endif
 241 #ifdef MS_HAS_NEW_AOPS
 242         sb->s_flags |= MS_HAS_NEW_AOPS;
 243 #endif
 244
 245         if (sbi->ll_flags & LL_SBI_FLOCK)
 246                 sbi->ll_fop = &ll_file_operations_flock;
 247         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 248                 sbi->ll_fop = &ll_file_operations;
 249         else
 250                 sbi->ll_fop = &ll_file_operations_noflock;
 251
 252         /* real client */
 253         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 254         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 255                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 256
 257         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 258
 259         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 260         if (err == -EBUSY) {
 261                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 262                                    "recovery, of which this client is not a "
 263                                    "part. Please wait for recovery to complete,"
 264                                    " abort, or time out.\n", md);
 265                 GOTO(out, err);
 266         } else if (err) {
 267                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 268                 GOTO(out, err);
 269         }
 270
 271         sbi->ll_md_exp->exp_connect_data = *data;
 272
 273         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 274                            LUSTRE_SEQ_METADATA);
 275         if (err) {
 276                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 277                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 278                 GOTO(out_md, err);
 279         }
 280
 281         /* For mount, we only need fs info from MDT0, and also in DNE, it
 282          * can make sure the client can be mounted as long as MDT0 is
 283          * avaible */
 284         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 285                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 286                         OBD_STATFS_FOR_MDT0);
 287         if (err)
 288                 GOTO(out_md_fid, err);
 289
 290         /* This needs to be after statfs to ensure connect has finished.
 291          * Note that "data" does NOT contain the valid connect reply.
 292          * If connecting to a 1.8 server there will be no LMV device, so
 293          * we can access the MDC export directly and exp_connect_flags will
 294          * be non-zero, but if accessing an upgraded 2.1 server it will
 295          * have the correct flags filled in.
 296          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 297         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 298         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 299             valid != CLIENT_CONNECT_MDT_REQD) {
 300                 char *buf;
 301
 302                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 303                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 304                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 305                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 306                                    "feature(s) needed for correct operation "
 307                                    "of this client (%s). Please upgrade "
 308                                    "server or downgrade client.\n",
 309                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 310                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 311                 GOTO(out_md_fid, err = -EPROTO);
 312         }
 313
 314         size = sizeof(*data);
 315         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 316                            KEY_CONN_DATA,  &size, data, NULL);
 317         if (err) {
 318                 CERROR("%s: Get connect data failed: rc = %d\n",
 319                        sbi->ll_md_exp->exp_obd->obd_name, err);
 320                 GOTO(out_md_fid, err);
 321         }
 322
 323         LASSERT(osfs->os_bsize);
 324         sb->s_blocksize = osfs->os_bsize;
 325         sb->s_blocksize_bits = log2(osfs->os_bsize);
 326         sb->s_magic = LL_SUPER_MAGIC;
 327         sb->s_maxbytes = MAX_LFS_FILESIZE;
 328         sbi->ll_namelen = osfs->os_namelen;
 329         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 330
 331         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 332             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 333                 LCONSOLE_INFO("Disabling user_xattr feature because "
 334                               "it is not supported on the server\n");
 335                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 336         }
 337
 338         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 339 #ifdef MS_POSIXACL
 340                 sb->s_flags |= MS_POSIXACL;
 341 #endif
 342                 sbi->ll_flags |= LL_SBI_ACL;
 343         } else {
 344                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 345 #ifdef MS_POSIXACL
 346                 sb->s_flags &= ~MS_POSIXACL;
 347 #endif
 348                 sbi->ll_flags &= ~LL_SBI_ACL;
 349         }
 350
 351         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 352                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 353                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 354                         LCONSOLE_INFO("client is set as remote by default.\n");
 355                 }
 356         } else {
 357                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 358                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 359                         LCONSOLE_INFO("client claims to be remote, but server "
 360                                       "rejected, forced to be local.\n");
 361                 }
 362         }
 363
 364         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 365                 LCONSOLE_INFO("client enabled MDS capability!\n");
 366                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 367         }
 368
 369         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 370                 LCONSOLE_INFO("client enabled OSS capability!\n");
 371                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 372         }
 373
 374         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 375                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 376
 377         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 378                 sbi->ll_md_brw_size = data->ocd_brw_size;
 379         else
 380                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 381
 382         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 383                 LCONSOLE_INFO("Layout lock feature supported.\n");
 384                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 385         }
 386
 387         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 388                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 389                         LCONSOLE_INFO(
 390                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 391                                 dt);
 392                 } else {
 393                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 394                         sbi->ll_xattr_cache_enabled = 1;
 395                 }
 396         }
 397
 398         obd = class_name2obd(dt);
 399         if (!obd) {
 400                 CERROR("DT %s: not setup or attached\n", dt);
 401                 GOTO(out_md_fid, err = -ENODEV);
 402         }
 403
 404         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 405                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 406                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 407                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 408                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 409                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 410                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 411                                   OBD_CONNECT_MAXBYTES |
 412                                   OBD_CONNECT_EINPROGRESS |
 413                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 414                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 415
 416         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 417                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 418
 419         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 420                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 421                  * disabled by default, because it can still be enabled on the
 422                  * fly via /proc. As a consequence, we still need to come to an
 423                  * agreement on the supported algorithms at connect time */
 424                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 425
 426                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 427                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 428                 else
 429                         data->ocd_cksum_types = cksum_types_supported_client();
 430         }
 431
 432         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 433         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 434                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 435
 436         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 437                "ocd_grant: %d\n", data->ocd_connect_flags,
 438                data->ocd_version, data->ocd_grant);
 439
 440         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 441         obd->obd_upcall.onu_upcall = cl_ocd_update;
 442
 443         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 444
 445         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 446                           NULL);
 447         if (err == -EBUSY) {
 448                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 449                                    "recovery, of which this client is not a "
 450                                    "part.  Please wait for recovery to "
 451                                    "complete, abort, or time out.\n", dt);
 452                 GOTO(out_md, err);
 453         } else if (err) {
 454                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 455                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 456                 GOTO(out_md, err);
 457         }
 458
 459         sbi->ll_dt_exp->exp_connect_data = *data;
 460
 461         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 462                            LUSTRE_SEQ_METADATA);
 463         if (err) {
 464                 CERROR("%s: Can't init data layer FID infrastructure, "
 465                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 466                 GOTO(out_dt, err);
 467         }
 468
 469         mutex_lock(&sbi->ll_lco.lco_lock);
 470         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 471         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 472         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 473         mutex_unlock(&sbi->ll_lco.lco_lock);
 474
 475         fid_zero(&sbi->ll_root_fid);
 476         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 477         if (err) {
 478                 CERROR("cannot mds_connect: rc = %d\n", err);
 479                 GOTO(out_lock_cn_cb, err);
 480         }
 481         if (!fid_is_sane(&sbi->ll_root_fid)) {
 482                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 483                        sbi->ll_md_exp->exp_obd->obd_name,
 484                        PFID(&sbi->ll_root_fid));
 485                 GOTO(out_lock_cn_cb, err = -EINVAL);
 486         }
 487         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 488
 489         sb->s_op = &lustre_super_operations;
 490 #if THREAD_SIZE >= 8192 /*b=17630*/
 491         sb->s_export_op = &lustre_export_operations;
 492 #endif
 493
 494         /* make root inode
 495          * XXX: move this to after cbd setup? */
 496         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 497         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 498                 valid |= OBD_MD_FLRMTPERM;
 499         else if (sbi->ll_flags & LL_SBI_ACL)
 500                 valid |= OBD_MD_FLACL;
 501
 502         OBD_ALLOC_PTR(op_data);
 503         if (op_data == NULL)
 504                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 505
 506         op_data->op_fid1 = sbi->ll_root_fid;
 507         op_data->op_mode = 0;
 508         op_data->op_capa1 = oc;
 509         op_data->op_valid = valid;
 510
 511         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 512         if (oc)
 513                 capa_put(oc);
 514         OBD_FREE_PTR(op_data);
 515         if (err) {
 516                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 517                        sbi->ll_md_exp->exp_obd->obd_name, err);
 518                 GOTO(out_lock_cn_cb, err);
 519         }
 520
 521         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 522                                sbi->ll_md_exp, &lmd);
 523         if (err) {
 524                 CERROR("failed to understand root inode md: rc = %d\n", err);
 525                 ptlrpc_req_finished(request);
 526                 GOTO(out_lock_cn_cb, err);
 527         }
 528
 529         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 530         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 531                                             sbi->ll_flags & LL_SBI_32BIT_API),
 532                        &lmd);
 533         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 534         ptlrpc_req_finished(request);
 535
 536         if (root == NULL || IS_ERR(root)) {
 537                 if (lmd.lsm)
 538                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 539 #ifdef CONFIG_FS_POSIX_ACL
 540                 if (lmd.posix_acl) {
 541                         posix_acl_release(lmd.posix_acl);
 542                         lmd.posix_acl = NULL;
 543                 }
 544 #endif
 545                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 546                 root = NULL;
 547                 CERROR("lustre_lite: bad iget4 for root\n");
 548                 GOTO(out_root, err);
 549         }
 550
 551         err = ll_close_thread_start(&sbi->ll_lcq);
 552         if (err) {
 553                 CERROR("cannot start close thread: rc %d\n", err);
 554                 GOTO(out_root, err);
 555         }
 556
 557 #ifdef CONFIG_FS_POSIX_ACL
 558         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 559                 rct_init(&sbi->ll_rct);
 560                 et_init(&sbi->ll_et);
 561         }
 562 #endif
 563
 564         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 565         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 566                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 567                                  NULL);
 568         cl_sb_init(sb);
 569
 570         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 571                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 572                                  &sbi->ll_cache, NULL);
 573
 574         sb->s_root = d_make_root(root);
 575         if (sb->s_root == NULL) {
 576                 CERROR("%s: can't make root dentry\n",
 577                         ll_get_fsname(sb, NULL, 0));
 578                 GOTO(out_root, err = -ENOMEM);
 579         }
 580
 581         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 582         d_set_d_op(sb->s_root, &ll_d_root_ops);
 583         sb->s_d_op = &ll_d_ops;
 584
 585         sbi->ll_sdev_orig = sb->s_dev;
 586
 587         /* We set sb->s_dev equal on all lustre clients in order to support
 588          * NFS export clustering.  NFSD requires that the FSID be the same
 589          * on all clients. */
 590         /* s_dev is also used in lt_compare() to compare two fs, but that is
 591          * only a node-local comparison. */
 592         uuid = obd_get_uuid(sbi->ll_md_exp);
 593         if (uuid != NULL) {
 594                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 595                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 596         }
 597
 598         if (data != NULL)
 599                 OBD_FREE_PTR(data);
 600         if (osfs != NULL)
 601                 OBD_FREE_PTR(osfs);
 602
 603         return err;
 604 out_root:
 605         if (root)
 606                 iput(root);
 607 out_lock_cn_cb:
 608         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 609 out_dt:
 610         obd_disconnect(sbi->ll_dt_exp);
 611         sbi->ll_dt_exp = NULL;
 612         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 613         obd_zombie_barrier();
 614 out_md_fid:
 615         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 616 out_md:
 617         obd_disconnect(sbi->ll_md_exp);
 618         sbi->ll_md_exp = NULL;
 619 out:
 620         if (data != NULL)
 621                 OBD_FREE_PTR(data);
 622         if (osfs != NULL)
 623                 OBD_FREE_PTR(osfs);
 624         lprocfs_unregister_mountpoint(sbi);
 625         return err;
 626 }
 627
 628 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 629 {
 630         int size, rc;
 631
 632         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 633         size = sizeof(int);
 634         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 635                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 636         if (rc)
 637                 CERROR("Get max mdsize error rc %d \n", rc);
 638
 639         return rc;
 640 }
 641
 642 void ll_dump_inode(struct inode *inode)
 643 {
 644         struct ll_d_hlist_node *tmp;
 645         int dentry_count = 0;
 646
 647         LASSERT(inode != NULL);
 648
 649         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 650                 dentry_count++;
 651
 652         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 653                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 654                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 655 }
 656
 657 void lustre_dump_dentry(struct dentry *dentry, int recur)
 658 {
 659         struct list_head *tmp;
 660         int subdirs = 0;
 661
 662         LASSERT(dentry != NULL);
 663
 664         list_for_each(tmp, &dentry->d_subdirs)
 665                 subdirs++;
 666
 667         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 668                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 669                dentry->d_name.len, dentry->d_name.name,
 670                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 671                dentry->d_parent, dentry->d_inode, d_count(dentry),
 672                dentry->d_flags, dentry->d_fsdata, subdirs);
 673         if (dentry->d_inode != NULL)
 674                 ll_dump_inode(dentry->d_inode);
 675
 676         if (recur == 0)
 677                 return;
 678
 679         list_for_each(tmp, &dentry->d_subdirs) {
 680                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 681                 lustre_dump_dentry(d, recur - 1);
 682         }
 683 }
 684
 685 void client_common_put_super(struct super_block *sb)
 686 {
 687         struct ll_sb_info *sbi = ll_s2sbi(sb);
 688
 689 #ifdef CONFIG_FS_POSIX_ACL
 690         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 691                 et_fini(&sbi->ll_et);
 692                 rct_fini(&sbi->ll_rct);
 693         }
 694 #endif
 695
 696         ll_close_thread_shutdown(sbi->ll_lcq);
 697
 698         cl_sb_fini(sb);
 699
 700         list_del(&sbi->ll_conn_chain);
 701
 702         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 703         obd_disconnect(sbi->ll_dt_exp);
 704         sbi->ll_dt_exp = NULL;
 705         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 706          * see LU-2543. */
 707         obd_zombie_barrier();
 708
 709         lprocfs_unregister_mountpoint(sbi);
 710
 711         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 712         obd_disconnect(sbi->ll_md_exp);
 713         sbi->ll_md_exp = NULL;
 714 }
 715
 716 void ll_kill_super(struct super_block *sb)
 717 {
 718         struct ll_sb_info *sbi;
 719
 720         /* not init sb ?*/
 721         if (!(sb->s_flags & MS_ACTIVE))
 722                 return;
 723
 724         sbi = ll_s2sbi(sb);
 725         /* we need restore s_dev from changed for clustred NFS before put_super
 726          * because new kernels have cached s_dev and change sb->s_dev in
 727          * put_super not affected real removing devices */
 728         if (sbi) {
 729                 sb->s_dev = sbi->ll_sdev_orig;
 730                 sbi->ll_umounting = 1;
 731         }
 732 }
 733
 734 char *ll_read_opt(const char *opt, char *data)
 735 {
 736         char *value;
 737         char *retval;
 738
 739         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 740         if (strncmp(opt, data, strlen(opt)))
 741                 return NULL;
 742         if ((value = strchr(data, '=')) == NULL)
 743                 return NULL;
 744
 745         value++;
 746         OBD_ALLOC(retval, strlen(value) + 1);
 747         if (!retval) {
 748                 CERROR("out of memory!\n");
 749                 return NULL;
 750         }
 751
 752         memcpy(retval, value, strlen(value)+1);
 753         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 754         return retval;
 755 }
 756
 757 static inline int ll_set_opt(const char *opt, char *data, int fl)
 758 {
 759         if (strncmp(opt, data, strlen(opt)) != 0)
 760                 return(0);
 761         else
 762                 return(fl);
 763 }
 764
 765 /* non-client-specific mount options are parsed in lmd_parse */
 766 static int ll_options(char *options, int *flags)
 767 {
 768         int tmp;
 769         char *s1 = options, *s2;
 770
 771         if (!options)
 772                 return 0;
 773
 774         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 775
 776         while (*s1) {
 777                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 778                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 779                 if (tmp) {
 780                         *flags |= tmp;
 781                         goto next;
 782                 }
 783                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 784                 if (tmp) {
 785                         *flags |= tmp;
 786                         goto next;
 787                 }
 788                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 789                 if (tmp) {
 790                         *flags |= tmp;
 791                         goto next;
 792                 }
 793                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 794                 if (tmp) {
 795                         *flags &= ~tmp;
 796                         goto next;
 797                 }
 798                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 799                 if (tmp) {
 800                         *flags |= tmp;
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 804                 if (tmp) {
 805                         *flags &= ~tmp;
 806                         goto next;
 807                 }
 808 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 809                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 810                 if (tmp) {
 811                         /* Ignore deprecated mount option.  The client will
 812                          * always try to mount with ACL support, whether this
 813                          * is used depends on whether server supports it. */
 814                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 815                                                   "mount option 'acl'.\n");
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 819                 if (tmp) {
 820                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 821                                                   "mount option 'noacl'.\n");
 822                         goto next;
 823                 }
 824 #else
 825 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 826 #endif
 827                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 828                 if (tmp) {
 829                         *flags |= tmp;
 830                         goto next;
 831                 }
 832                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 833                 if (tmp) {
 834                         *flags |= tmp;
 835                         goto next;
 836                 }
 837                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 838                 if (tmp) {
 839                         *flags &= ~tmp;
 840                         goto next;
 841                 }
 842
 843                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 844                 if (tmp) {
 845                         *flags |= tmp;
 846                         goto next;
 847                 }
 848                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 849                 if (tmp) {
 850                         *flags &= ~tmp;
 851                         goto next;
 852                 }
 853                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 854                 if (tmp) {
 855                         *flags |= tmp;
 856                         goto next;
 857                 }
 858                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 859                 if (tmp) {
 860                         *flags &= ~tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 864                 if (tmp) {
 865                         *flags |= tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 869                 if (tmp) {
 870                         *flags &= ~tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 874                 if (tmp) {
 875                         *flags |= tmp;
 876                         goto next;
 877                 }
 878                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 879                 if (tmp) {
 880                         *flags |= tmp;
 881                         goto next;
 882                 }
 883                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 884                 if (tmp) {
 885                         *flags |= tmp;
 886                         goto next;
 887                 }
 888                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 889                 if (tmp) {
 890                         *flags &= ~tmp;
 891                         goto next;
 892                 }
 893                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 894                                    s1);
 895                 return -EINVAL;
 896
 897 next:
 898                 /* Find next opt */
 899                 s2 = strchr(s1, ',');
 900                 if (s2 == NULL)
 901                         break;
 902                 s1 = s2 + 1;
 903         }
 904         return 0;
 905 }
 906
 907 void ll_lli_init(struct ll_inode_info *lli)
 908 {
 909         lli->lli_inode_magic = LLI_INODE_MAGIC;
 910         lli->lli_flags = 0;
 911         lli->lli_ioepoch = 0;
 912         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 913         spin_lock_init(&lli->lli_lock);
 914         lli->lli_posix_acl = NULL;
 915         lli->lli_remote_perms = NULL;
 916         mutex_init(&lli->lli_rmtperm_mutex);
 917         /* Do not set lli_fid, it has been initialized already. */
 918         fid_zero(&lli->lli_pfid);
 919         INIT_LIST_HEAD(&lli->lli_close_list);
 920         INIT_LIST_HEAD(&lli->lli_oss_capas);
 921         atomic_set(&lli->lli_open_count, 0);
 922         lli->lli_mds_capa = NULL;
 923         lli->lli_rmtperm_time = 0;
 924         lli->lli_pending_och = NULL;
 925         lli->lli_mds_read_och = NULL;
 926         lli->lli_mds_write_och = NULL;
 927         lli->lli_mds_exec_och = NULL;
 928         lli->lli_open_fd_read_count = 0;
 929         lli->lli_open_fd_write_count = 0;
 930         lli->lli_open_fd_exec_count = 0;
 931         mutex_init(&lli->lli_och_mutex);
 932         spin_lock_init(&lli->lli_agl_lock);
 933         lli->lli_has_smd = false;
 934         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 935         lli->lli_clob = NULL;
 936
 937         init_rwsem(&lli->lli_xattrs_list_rwsem);
 938         mutex_init(&lli->lli_xattrs_enq_lock);
 939
 940         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 941         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 942                 mutex_init(&lli->lli_readdir_mutex);
 943                 lli->lli_opendir_key = NULL;
 944                 lli->lli_sai = NULL;
 945                 lli->lli_def_acl = NULL;
 946                 spin_lock_init(&lli->lli_sa_lock);
 947                 lli->lli_opendir_pid = 0;
 948         } else {
 949                 sema_init(&lli->lli_size_sem, 1);
 950                 lli->lli_size_sem_owner = NULL;
 951                 lli->lli_symlink_name = NULL;
 952                 init_rwsem(&lli->lli_trunc_sem);
 953                 mutex_init(&lli->lli_write_mutex);
 954                 init_rwsem(&lli->lli_glimpse_sem);
 955                 lli->lli_glimpse_time = 0;
 956                 INIT_LIST_HEAD(&lli->lli_agl_list);
 957                 lli->lli_agl_index = 0;
 958                 lli->lli_async_rc = 0;
 959                 lli->lli_volatile = false;
 960         }
 961         mutex_init(&lli->lli_layout_mutex);
 962 }
 963
 964 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 965 {
 966         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 967
 968         bdi->name = "lustre";
 969         return bdi_register(bdi, NULL, "lustre-%d",
 970                             atomic_inc_return(&ll_bdi_num));
 971 }
 972
 973 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 974 {
 975         struct lustre_profile *lprof = NULL;
 976         struct lustre_sb_info *lsi = s2lsi(sb);
 977         struct ll_sb_info *sbi;
 978         char  *dt = NULL, *md = NULL;
 979         char  *profilenm = get_profile_name(sb);
 980         struct config_llog_instance *cfg;
 981         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 982         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 983         int    err;
 984
 985         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 986
 987         OBD_ALLOC_PTR(cfg);
 988         if (cfg == NULL)
 989                 return -ENOMEM;
 990
 991         try_module_get(THIS_MODULE);
 992
 993         /* client additional sb info */
 994         lsi->lsi_llsbi = sbi = ll_init_sbi();
 995         if (!sbi) {
 996                 module_put(THIS_MODULE);
 997                 OBD_FREE_PTR(cfg);
 998                 return -ENOMEM;
 999         }
1000
1001         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1002         if (err)
1003                 GOTO(out_free, err);
1004
1005         err = bdi_init(&lsi->lsi_bdi);
1006         if (err)
1007                 GOTO(out_free, err);
1008         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1009         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1010         err = ll_bdi_register(&lsi->lsi_bdi);
1011         if (err)
1012                 GOTO(out_free, err);
1013
1014         sb->s_bdi = &lsi->lsi_bdi;
1015
1016         /* Generate a string unique to this super, in case some joker tries
1017            to mount the same fs at two mount points.
1018            Use the address of the super itself.*/
1019         cfg->cfg_instance = sb;
1020         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1021         cfg->cfg_callback = class_config_llog_handler;
1022         /* set up client obds */
1023         err = lustre_process_log(sb, profilenm, cfg);
1024         if (err < 0) {
1025                 CERROR("Unable to process log: %d\n", err);
1026                 GOTO(out_free, err);
1027         }
1028
1029         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1030         lprof = class_get_profile(profilenm);
1031         if (lprof == NULL) {
1032                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1033                                    " read from the MGS.  Does that filesystem "
1034                                    "exist?\n", profilenm);
1035                 GOTO(out_free, err = -EINVAL);
1036         }
1037         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1038                lprof->lp_md, lprof->lp_dt);
1039
1040         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1041         if (!dt)
1042                 GOTO(out_free, err = -ENOMEM);
1043         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1044
1045         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1046         if (!md)
1047                 GOTO(out_free, err = -ENOMEM);
1048         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1049
1050         /* connections, registrations, sb setup */
1051         err = client_common_fill_super(sb, md, dt, mnt);
1052
1053 out_free:
1054         if (md)
1055                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1056         if (dt)
1057                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1058         if (err)
1059                 ll_put_super(sb);
1060         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1061                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1062
1063         OBD_FREE_PTR(cfg);
1064         return err;
1065 } /* ll_fill_super */
1066
1067 void ll_put_super(struct super_block *sb)
1068 {
1069         struct config_llog_instance cfg;
1070         struct obd_device *obd;
1071         struct lustre_sb_info *lsi = s2lsi(sb);
1072         struct ll_sb_info *sbi = ll_s2sbi(sb);
1073         char *profilenm = get_profile_name(sb);
1074         int next, force = 1;
1075
1076         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1077
1078         ll_print_capa_stat(sbi);
1079
1080         cfg.cfg_instance = sb;
1081         lustre_end_log(sb, profilenm, &cfg);
1082
1083         if (sbi->ll_md_exp) {
1084                 obd = class_exp2obd(sbi->ll_md_exp);
1085                 if (obd)
1086                         force = obd->obd_force;
1087         }
1088
1089         /* We need to set force before the lov_disconnect in
1090            lustre_common_put_super, since l_d cleans up osc's as well. */
1091         if (force) {
1092                 next = 0;
1093                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1094                                                      &next)) != NULL) {
1095                         obd->obd_force = force;
1096                 }
1097         }
1098
1099         if (sbi->ll_lcq) {
1100                 /* Only if client_common_fill_super succeeded */
1101                 client_common_put_super(sb);
1102         }
1103
1104         next = 0;
1105         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1106                 class_manual_cleanup(obd);
1107         }
1108
1109         if (sbi->ll_flags & LL_SBI_VERBOSE)
1110                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1111
1112         if (profilenm)
1113                 class_del_profile(profilenm);
1114
1115         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1116                 bdi_destroy(&lsi->lsi_bdi);
1117                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1118         }
1119
1120         ll_free_sbi(sb);
1121         lsi->lsi_llsbi = NULL;
1122
1123         lustre_common_put_super(sb);
1124
1125         module_put(THIS_MODULE);
1126 } /* client_put_super */
1127
1128 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1129 {
1130         struct inode *inode = NULL;
1131
1132         /* NOTE: we depend on atomic igrab() -bzzz */
1133         lock_res_and_lock(lock);
1134         if (lock->l_resource->lr_lvb_inode) {
1135                 struct ll_inode_info * lli;
1136                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1137                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1138                         inode = igrab(lock->l_resource->lr_lvb_inode);
1139                 } else {
1140                         inode = lock->l_resource->lr_lvb_inode;
1141                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1142                                          D_WARNING, lock, "lr_lvb_inode %p is "
1143                                          "bogus: magic %08x",
1144                                          lock->l_resource->lr_lvb_inode,
1145                                          lli->lli_inode_magic);
1146                         inode = NULL;
1147                 }
1148         }
1149         unlock_res_and_lock(lock);
1150         return inode;
1151 }
1152
1153 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1154 {
1155         struct inode *inode = NULL;
1156         /* NOTE: we depend on atomic igrab() -bzzz */
1157         lock_res_and_lock(lock);
1158         if (lock->l_ast_data) {
1159                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1160                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1161                         inode = igrab(lock->l_ast_data);
1162                 } else {
1163                         inode = lock->l_ast_data;
1164                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1165                                          D_WARNING, lock, "l_ast_data %p is "
1166                                          "bogus: magic %08x", lock->l_ast_data,
1167                                          lli->lli_inode_magic);
1168                         inode = NULL;
1169                 }
1170         }
1171         unlock_res_and_lock(lock);
1172         return inode;
1173 }
1174
1175 void ll_clear_inode(struct inode *inode)
1176 {
1177         struct ll_inode_info *lli = ll_i2info(inode);
1178         struct ll_sb_info *sbi = ll_i2sbi(inode);
1179
1180         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1181                inode->i_generation, inode);
1182
1183         if (S_ISDIR(inode->i_mode)) {
1184                 /* these should have been cleared in ll_file_release */
1185                 LASSERT(lli->lli_opendir_key == NULL);
1186                 LASSERT(lli->lli_sai == NULL);
1187                 LASSERT(lli->lli_opendir_pid == 0);
1188         }
1189
1190         spin_lock(&lli->lli_lock);
1191         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1192         spin_unlock(&lli->lli_lock);
1193         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1194
1195         LASSERT(!lli->lli_open_fd_write_count);
1196         LASSERT(!lli->lli_open_fd_read_count);
1197         LASSERT(!lli->lli_open_fd_exec_count);
1198
1199         if (lli->lli_mds_write_och)
1200                 ll_md_real_close(inode, FMODE_WRITE);
1201         if (lli->lli_mds_exec_och)
1202                 ll_md_real_close(inode, FMODE_EXEC);
1203         if (lli->lli_mds_read_och)
1204                 ll_md_real_close(inode, FMODE_READ);
1205
1206         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1207                 OBD_FREE(lli->lli_symlink_name,
1208                          strlen(lli->lli_symlink_name) + 1);
1209                 lli->lli_symlink_name = NULL;
1210         }
1211
1212         ll_xattr_cache_destroy(inode);
1213
1214         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1215                 LASSERT(lli->lli_posix_acl == NULL);
1216                 if (lli->lli_remote_perms) {
1217                         free_rmtperm_hash(lli->lli_remote_perms);
1218                         lli->lli_remote_perms = NULL;
1219                 }
1220         }
1221 #ifdef CONFIG_FS_POSIX_ACL
1222         else if (lli->lli_posix_acl) {
1223                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1224                 LASSERT(lli->lli_remote_perms == NULL);
1225                 posix_acl_release(lli->lli_posix_acl);
1226                 lli->lli_posix_acl = NULL;
1227         }
1228 #endif
1229         lli->lli_inode_magic = LLI_INODE_DEAD;
1230
1231         ll_clear_inode_capas(inode);
1232         if (!S_ISDIR(inode->i_mode))
1233                 LASSERT(list_empty(&lli->lli_agl_list));
1234
1235         /*
1236          * XXX This has to be done before lsm is freed below, because
1237          * cl_object still uses inode lsm.
1238          */
1239         cl_inode_fini(inode);
1240         lli->lli_has_smd = false;
1241 }
1242
1243 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1244                   struct md_open_data **mod)
1245 {
1246         struct lustre_md md;
1247         struct inode *inode = dentry->d_inode;
1248         struct ll_sb_info *sbi = ll_i2sbi(inode);
1249         struct ptlrpc_request *request = NULL;
1250         int rc, ia_valid;
1251
1252         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1253                                      LUSTRE_OPC_ANY, NULL);
1254         if (IS_ERR(op_data))
1255                 return PTR_ERR(op_data);
1256
1257         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1258                         &request, mod);
1259         if (rc) {
1260                 ptlrpc_req_finished(request);
1261                 if (rc == -ENOENT) {
1262                         clear_nlink(inode);
1263                         /* Unlinked special device node? Or just a race?
1264                          * Pretend we done everything. */
1265                         if (!S_ISREG(inode->i_mode) &&
1266                             !S_ISDIR(inode->i_mode)) {
1267                                 ia_valid = op_data->op_attr.ia_valid;
1268                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1269                                 rc = simple_setattr(dentry, &op_data->op_attr);
1270                                 op_data->op_attr.ia_valid = ia_valid;
1271                         }
1272                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1273                         CERROR("md_setattr fails: rc = %d\n", rc);
1274                 }
1275                 return rc;
1276         }
1277
1278         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1279                               sbi->ll_md_exp, &md);
1280         if (rc) {
1281                 ptlrpc_req_finished(request);
1282                 return rc;
1283         }
1284
1285         ia_valid = op_data->op_attr.ia_valid;
1286         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1287          * cache is not cleared yet. */
1288         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1289         rc = simple_setattr(dentry, &op_data->op_attr);
1290         op_data->op_attr.ia_valid = ia_valid;
1291
1292         /* Extract epoch data if obtained. */
1293         op_data->op_handle = md.body->handle;
1294         op_data->op_ioepoch = md.body->ioepoch;
1295
1296         ll_update_inode(inode, &md);
1297         ptlrpc_req_finished(request);
1298
1299         return rc;
1300 }
1301
1302 /* Close IO epoch and send Size-on-MDS attribute update. */
1303 static int ll_setattr_done_writing(struct inode *inode,
1304                                    struct md_op_data *op_data,
1305                                    struct md_open_data *mod)
1306 {
1307         struct ll_inode_info *lli = ll_i2info(inode);
1308         int rc = 0;
1309
1310         LASSERT(op_data != NULL);
1311         if (!S_ISREG(inode->i_mode))
1312                 return 0;
1313
1314         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1315                op_data->op_ioepoch, PFID(&lli->lli_fid));
1316
1317         op_data->op_flags = MF_EPOCH_CLOSE;
1318         ll_done_writing_attr(inode, op_data);
1319         ll_pack_inode2opdata(inode, op_data, NULL);
1320
1321         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1322         if (rc == -EAGAIN) {
1323                 /* MDS has instructed us to obtain Size-on-MDS attribute
1324                  * from OSTs and send setattr to back to MDS. */
1325                 rc = ll_som_update(inode, op_data);
1326         } else if (rc) {
1327                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1328                        inode->i_ino, rc);
1329         }
1330         return rc;
1331 }
1332
1333 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1334 {
1335         struct obd_capa *capa;
1336         int rc;
1337
1338         if (attr->ia_valid & ATTR_SIZE)
1339                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1340         else
1341                 capa = ll_mdscapa_get(inode);
1342
1343         rc = cl_setattr_ost(inode, attr, capa);
1344
1345         if (attr->ia_valid & ATTR_SIZE)
1346                 ll_truncate_free_capa(capa);
1347         else
1348                 capa_put(capa);
1349
1350         return rc;
1351 }
1352
1353
1354 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1355  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1356  * keep these values until such a time that objects are allocated for it.
1357  * We do the MDS operations first, as it is checking permissions for us.
1358  * We don't to the MDS RPC if there is nothing that we want to store there,
1359  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1360  * going to do an RPC anyways.
1361  *
1362  * If we are doing a truncate, we will send the mtime and ctime updates
1363  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1364  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1365  * at the same time.
1366  */
1367 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr)
1368 {
1369         struct inode *inode = dentry->d_inode;
1370         struct ll_inode_info *lli = ll_i2info(inode);
1371         struct md_op_data *op_data = NULL;
1372         struct md_open_data *mod = NULL;
1373         bool file_is_released = false;
1374         int rc = 0, rc1 = 0;
1375
1376         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1377                 "valid %x\n", ll_get_fsname(inode->i_sb, NULL, 0), inode,
1378                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1379                 attr->ia_valid);
1380
1381         if (attr->ia_valid & ATTR_SIZE) {
1382                 /* Check new size against VFS/VM file size limit and rlimit */
1383                 rc = inode_newsize_ok(inode, attr->ia_size);
1384                 if (rc)
1385                         return rc;
1386
1387                 /* The maximum Lustre file size is variable, based on the
1388                  * OST maximum object size and number of stripes.  This
1389                  * needs another check in addition to the VFS check above. */
1390                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1391                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1392                                PFID(&lli->lli_fid), attr->ia_size,
1393                                ll_file_maxbytes(inode));
1394                         return -EFBIG;
1395                 }
1396
1397                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1398         }
1399
1400         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1401         if (attr->ia_valid & TIMES_SET_FLAGS) {
1402                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1403                     !cfs_capable(CFS_CAP_FOWNER))
1404                         return -EPERM;
1405         }
1406
1407         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1408         if (attr->ia_valid & ATTR_CTIME) {
1409                 attr->ia_ctime = CURRENT_TIME;
1410                 attr->ia_valid |= ATTR_CTIME_SET;
1411         }
1412         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1413             (attr->ia_valid & ATTR_ATIME)) {
1414                 attr->ia_atime = CURRENT_TIME;
1415                 attr->ia_valid |= ATTR_ATIME_SET;
1416         }
1417         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1418             (attr->ia_valid & ATTR_MTIME)) {
1419                 attr->ia_mtime = CURRENT_TIME;
1420                 attr->ia_valid |= ATTR_MTIME_SET;
1421         }
1422
1423         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1424                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1425                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1426                        cfs_time_current_sec());
1427
1428         /* If we are changing file size, file content is modified, flag it. */
1429         if (attr->ia_valid & ATTR_SIZE) {
1430                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1431                 spin_lock(&lli->lli_lock);
1432                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1433                 spin_unlock(&lli->lli_lock);
1434         }
1435
1436         /* We always do an MDS RPC, even if we're only changing the size;
1437          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1438
1439         OBD_ALLOC_PTR(op_data);
1440         if (op_data == NULL)
1441                 return -ENOMEM;
1442
1443         if (!S_ISDIR(inode->i_mode)) {
1444                 if (attr->ia_valid & ATTR_SIZE)
1445                         inode_dio_write_done(inode);
1446                 mutex_unlock(&inode->i_mutex);
1447                 down_write(&lli->lli_trunc_sem);
1448         }
1449
1450         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1451
1452         /* Open epoch for truncate. */
1453         if (exp_connect_som(ll_i2mdexp(inode)) &&
1454             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1455                 op_data->op_flags = MF_EPOCH_OPEN;
1456
1457         /* truncate on a released file must failed with -ENODATA,
1458          * so size must not be set on MDS for released file
1459          * but other attributes must be set
1460          */
1461         if (S_ISREG(inode->i_mode)) {
1462                 struct lov_stripe_md *lsm;
1463                 __u32 gen;
1464
1465                 ll_layout_refresh(inode, &gen);
1466                 lsm = ccc_inode_lsm_get(inode);
1467                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1468                         file_is_released = true;
1469                 ccc_inode_lsm_put(inode, lsm);
1470         }
1471
1472         /* clear size attr for released file
1473          * we clear the attribute send to MDT in op_data, not the original
1474          * received from caller in attr which is used later to
1475          * decide return code */
1476         if (file_is_released && (attr->ia_valid & ATTR_SIZE))
1477                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1478
1479         rc = ll_md_setattr(dentry, op_data, &mod);
1480         if (rc)
1481                 GOTO(out, rc);
1482
1483         /* truncate failed, others succeed */
1484         if (file_is_released) {
1485                 if (attr->ia_valid & ATTR_SIZE)
1486                         GOTO(out, rc = -ENODATA);
1487                 else
1488                         GOTO(out, rc = 0);
1489         }
1490
1491         /* RPC to MDT is sent, cancel data modification flag */
1492         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1493                 spin_lock(&lli->lli_lock);
1494                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1495                 spin_unlock(&lli->lli_lock);
1496         }
1497
1498         ll_ioepoch_open(lli, op_data->op_ioepoch);
1499         if (!S_ISREG(inode->i_mode))
1500                 GOTO(out, rc = 0);
1501
1502         if (attr->ia_valid & (ATTR_SIZE |
1503                               ATTR_ATIME | ATTR_ATIME_SET |
1504                               ATTR_MTIME | ATTR_MTIME_SET))
1505                 /* For truncate and utimes sending attributes to OSTs, setting
1506                  * mtime/atime to the past will be performed under PW [0:EOF]
1507                  * extent lock (new_size:EOF for truncate).  It may seem
1508                  * excessive to send mtime/atime updates to OSTs when not
1509                  * setting times to past, but it is necessary due to possible
1510                  * time de-synchronization between MDT inode and OST objects */
1511                 rc = ll_setattr_ost(inode, attr);
1512 out:
1513         if (op_data) {
1514                 if (op_data->op_ioepoch) {
1515                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1516                         if (!rc)
1517                                 rc = rc1;
1518                 }
1519                 ll_finish_md_op_data(op_data);
1520         }
1521         if (!S_ISDIR(inode->i_mode)) {
1522                 up_write(&lli->lli_trunc_sem);
1523                 mutex_lock(&inode->i_mutex);
1524                 if (attr->ia_valid & ATTR_SIZE)
1525                         inode_dio_wait(inode);
1526         }
1527
1528         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1529                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1530
1531         return rc;
1532 }
1533
1534 int ll_setattr(struct dentry *de, struct iattr *attr)
1535 {
1536         int mode = de->d_inode->i_mode;
1537
1538         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1539                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1540                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1541
1542         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1543                                (ATTR_SIZE|ATTR_MODE)) &&
1544             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1545              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1546               !(attr->ia_mode & S_ISGID))))
1547                 attr->ia_valid |= ATTR_FORCE;
1548
1549         if ((mode & S_ISUID) &&
1550             !(attr->ia_mode & S_ISUID) &&
1551             !(attr->ia_valid & ATTR_KILL_SUID))
1552                 attr->ia_valid |= ATTR_KILL_SUID;
1553
1554         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1555             !(attr->ia_mode & S_ISGID) &&
1556             !(attr->ia_valid & ATTR_KILL_SGID))
1557                 attr->ia_valid |= ATTR_KILL_SGID;
1558
1559         return ll_setattr_raw(de, attr);
1560 }
1561
1562 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1563                        __u64 max_age, __u32 flags)
1564 {
1565         struct ll_sb_info *sbi = ll_s2sbi(sb);
1566         struct obd_statfs obd_osfs;
1567         int rc;
1568
1569         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1570         if (rc) {
1571                 CERROR("md_statfs fails: rc = %d\n", rc);
1572                 return rc;
1573         }
1574
1575         osfs->os_type = sb->s_magic;
1576
1577         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1578                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1579
1580         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1581                 flags |= OBD_STATFS_NODELAY;
1582
1583         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1584         if (rc) {
1585                 CERROR("obd_statfs fails: rc = %d\n", rc);
1586                 return rc;
1587         }
1588
1589         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1590                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1591                obd_osfs.os_files);
1592
1593         osfs->os_bsize = obd_osfs.os_bsize;
1594         osfs->os_blocks = obd_osfs.os_blocks;
1595         osfs->os_bfree = obd_osfs.os_bfree;
1596         osfs->os_bavail = obd_osfs.os_bavail;
1597
1598         /* If we don't have as many objects free on the OST as inodes
1599          * on the MDS, we reduce the total number of inodes to
1600          * compensate, so that the "inodes in use" number is correct.
1601          */
1602         if (obd_osfs.os_ffree < osfs->os_ffree) {
1603                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1604                         obd_osfs.os_ffree;
1605                 osfs->os_ffree = obd_osfs.os_ffree;
1606         }
1607
1608         return rc;
1609 }
1610 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1611 {
1612         struct super_block *sb = de->d_sb;
1613         struct obd_statfs osfs;
1614         int rc;
1615
1616         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1617         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1618
1619         /* Some amount of caching on the client is allowed */
1620         rc = ll_statfs_internal(sb, &osfs,
1621                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1622                                 0);
1623         if (rc)
1624                 return rc;
1625
1626         statfs_unpack(sfs, &osfs);
1627
1628         /* We need to downshift for all 32-bit kernels, because we can't
1629          * tell if the kernel is being called via sys_statfs64() or not.
1630          * Stop before overflowing f_bsize - in which case it is better
1631          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1632         if (sizeof(long) < 8) {
1633                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1634                         sfs->f_bsize <<= 1;
1635
1636                         osfs.os_blocks >>= 1;
1637                         osfs.os_bfree >>= 1;
1638                         osfs.os_bavail >>= 1;
1639                 }
1640         }
1641
1642         sfs->f_blocks = osfs.os_blocks;
1643         sfs->f_bfree = osfs.os_bfree;
1644         sfs->f_bavail = osfs.os_bavail;
1645         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1646         return 0;
1647 }
1648
1649 void ll_inode_size_lock(struct inode *inode)
1650 {
1651         struct ll_inode_info *lli;
1652
1653         LASSERT(!S_ISDIR(inode->i_mode));
1654
1655         lli = ll_i2info(inode);
1656         LASSERT(lli->lli_size_sem_owner != current);
1657         down(&lli->lli_size_sem);
1658         LASSERT(lli->lli_size_sem_owner == NULL);
1659         lli->lli_size_sem_owner = current;
1660 }
1661
1662 void ll_inode_size_unlock(struct inode *inode)
1663 {
1664         struct ll_inode_info *lli;
1665
1666         lli = ll_i2info(inode);
1667         LASSERT(lli->lli_size_sem_owner == current);
1668         lli->lli_size_sem_owner = NULL;
1669         up(&lli->lli_size_sem);
1670 }
1671
1672 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1673 {
1674         struct ll_inode_info *lli = ll_i2info(inode);
1675         struct mdt_body *body = md->body;
1676         struct lov_stripe_md *lsm = md->lsm;
1677         struct ll_sb_info *sbi = ll_i2sbi(inode);
1678
1679         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1680         if (lsm != NULL) {
1681                 if (!lli->lli_has_smd &&
1682                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1683                         cl_file_inode_init(inode, md);
1684
1685                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1686                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1687                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1688         }
1689
1690         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1691                 if (body->valid & OBD_MD_FLRMTPERM)
1692                         ll_update_remote_perm(inode, md->remote_perm);
1693         }
1694 #ifdef CONFIG_FS_POSIX_ACL
1695         else if (body->valid & OBD_MD_FLACL) {
1696                 spin_lock(&lli->lli_lock);
1697                 if (lli->lli_posix_acl)
1698                         posix_acl_release(lli->lli_posix_acl);
1699                 lli->lli_posix_acl = md->posix_acl;
1700                 spin_unlock(&lli->lli_lock);
1701         }
1702 #endif
1703         inode->i_ino = cl_fid_build_ino(&body->fid1,
1704                                         sbi->ll_flags & LL_SBI_32BIT_API);
1705         inode->i_generation = cl_fid_build_gen(&body->fid1);
1706
1707         if (body->valid & OBD_MD_FLATIME) {
1708                 if (body->atime > LTIME_S(inode->i_atime))
1709                         LTIME_S(inode->i_atime) = body->atime;
1710                 lli->lli_lvb.lvb_atime = body->atime;
1711         }
1712         if (body->valid & OBD_MD_FLMTIME) {
1713                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1714                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1715                                "to "LPU64"\n", inode->i_ino,
1716                                LTIME_S(inode->i_mtime), body->mtime);
1717                         LTIME_S(inode->i_mtime) = body->mtime;
1718                 }
1719                 lli->lli_lvb.lvb_mtime = body->mtime;
1720         }
1721         if (body->valid & OBD_MD_FLCTIME) {
1722                 if (body->ctime > LTIME_S(inode->i_ctime))
1723                         LTIME_S(inode->i_ctime) = body->ctime;
1724                 lli->lli_lvb.lvb_ctime = body->ctime;
1725         }
1726         if (body->valid & OBD_MD_FLMODE)
1727                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1728         if (body->valid & OBD_MD_FLTYPE)
1729                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1730         LASSERT(inode->i_mode != 0);
1731         if (S_ISREG(inode->i_mode)) {
1732                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1733         } else {
1734                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1735         }
1736         if (body->valid & OBD_MD_FLUID)
1737                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1738         if (body->valid & OBD_MD_FLGID)
1739                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1740         if (body->valid & OBD_MD_FLFLAGS)
1741                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1742         if (body->valid & OBD_MD_FLNLINK)
1743                 set_nlink(inode, body->nlink);
1744         if (body->valid & OBD_MD_FLRDEV)
1745                 inode->i_rdev = old_decode_dev(body->rdev);
1746
1747         if (body->valid & OBD_MD_FLID) {
1748                 /* FID shouldn't be changed! */
1749                 if (fid_is_sane(&lli->lli_fid)) {
1750                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1751                                  "Trying to change FID "DFID
1752                                  " to the "DFID", inode %lu/%u(%p)\n",
1753                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1754                                  inode->i_ino, inode->i_generation, inode);
1755                 } else
1756                         lli->lli_fid = body->fid1;
1757         }
1758
1759         LASSERT(fid_seq(&lli->lli_fid) != 0);
1760
1761         if (body->valid & OBD_MD_FLSIZE) {
1762                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1763                     S_ISREG(inode->i_mode)) {
1764                         struct lustre_handle lockh;
1765                         ldlm_mode_t mode;
1766
1767                         /* As it is possible a blocking ast has been processed
1768                          * by this time, we need to check there is an UPDATE
1769                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1770                          * it. */
1771                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1772                                                &lockh, LDLM_FL_CBPENDING,
1773                                                LCK_CR | LCK_CW |
1774                                                LCK_PR | LCK_PW);
1775                         if (mode) {
1776                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1777                                                       LLIF_EPOCH_PENDING |
1778                                                       LLIF_SOM_DIRTY)) {
1779                                         CERROR("ino %lu flags %u still has "
1780                                                "size authority! do not trust "
1781                                                "the size got from MDS\n",
1782                                                inode->i_ino, lli->lli_flags);
1783                                 } else {
1784                                         /* Use old size assignment to avoid
1785                                          * deadlock bz14138 & bz14326 */
1786                                         i_size_write(inode, body->size);
1787                                         spin_lock(&lli->lli_lock);
1788                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1789                                         spin_unlock(&lli->lli_lock);
1790                                 }
1791                                 ldlm_lock_decref(&lockh, mode);
1792                         }
1793                 } else {
1794                         /* Use old size assignment to avoid
1795                          * deadlock bz14138 & bz14326 */
1796                         i_size_write(inode, body->size);
1797
1798                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1799                                inode->i_ino, (unsigned long long)body->size);
1800                 }
1801
1802                 if (body->valid & OBD_MD_FLBLOCKS)
1803                         inode->i_blocks = body->blocks;
1804         }
1805
1806         if (body->valid & OBD_MD_FLMDSCAPA) {
1807                 LASSERT(md->mds_capa);
1808                 ll_add_capa(inode, md->mds_capa);
1809         }
1810         if (body->valid & OBD_MD_FLOSSCAPA) {
1811                 LASSERT(md->oss_capa);
1812                 ll_add_capa(inode, md->oss_capa);
1813         }
1814
1815         if (body->valid & OBD_MD_TSTATE) {
1816                 if (body->t_state & MS_RESTORE)
1817                         lli->lli_flags |= LLIF_FILE_RESTORING;
1818         }
1819 }
1820
1821 void ll_read_inode2(struct inode *inode, void *opaque)
1822 {
1823         struct lustre_md *md = opaque;
1824         struct ll_inode_info *lli = ll_i2info(inode);
1825
1826         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1827                PFID(&lli->lli_fid), inode);
1828
1829         LASSERT(!lli->lli_has_smd);
1830
1831         /* Core attributes from the MDS first.  This is a new inode, and
1832          * the VFS doesn't zero times in the core inode so we have to do
1833          * it ourselves.  They will be overwritten by either MDS or OST
1834          * attributes - we just need to make sure they aren't newer. */
1835         LTIME_S(inode->i_mtime) = 0;
1836         LTIME_S(inode->i_atime) = 0;
1837         LTIME_S(inode->i_ctime) = 0;
1838         inode->i_rdev = 0;
1839         ll_update_inode(inode, md);
1840
1841         /* OIDEBUG(inode); */
1842
1843         /* initializing backing dev info. */
1844         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1845
1846
1847         if (S_ISREG(inode->i_mode)) {
1848                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1849                 inode->i_op = &ll_file_inode_operations;
1850                 inode->i_fop = sbi->ll_fop;
1851                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1852         } else if (S_ISDIR(inode->i_mode)) {
1853                 inode->i_op = &ll_dir_inode_operations;
1854                 inode->i_fop = &ll_dir_operations;
1855         } else if (S_ISLNK(inode->i_mode)) {
1856                 inode->i_op = &ll_fast_symlink_inode_operations;
1857         } else {
1858                 inode->i_op = &ll_special_inode_operations;
1859
1860                 init_special_inode(inode, inode->i_mode,
1861                                    inode->i_rdev);
1862         }
1863 }
1864
1865 void ll_delete_inode(struct inode *inode)
1866 {
1867         struct cl_inode_info *lli = cl_i2info(inode);
1868
1869         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1870                 /* discard all dirty pages before truncating them, required by
1871                  * osc_extent implementation at LU-1030. */
1872                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1873                                    CL_FSYNC_DISCARD, 1);
1874
1875         truncate_inode_pages(&inode->i_data, 0);
1876
1877         /* Workaround for LU-118 */
1878         if (inode->i_data.nrpages) {
1879                 TREE_READ_LOCK_IRQ(&inode->i_data);
1880                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1881                 LASSERTF(inode->i_data.nrpages == 0,
1882                          "inode=%lu/%u(%p) nrpages=%lu, see "
1883                          "http://jira.whamcloud.com/browse/LU-118\n",
1884                          inode->i_ino, inode->i_generation, inode,
1885                          inode->i_data.nrpages);
1886         }
1887         /* Workaround end */
1888
1889         ll_clear_inode(inode);
1890         clear_inode(inode);
1891 }
1892
1893 int ll_iocontrol(struct inode *inode, struct file *file,
1894                  unsigned int cmd, unsigned long arg)
1895 {
1896         struct ll_sb_info *sbi = ll_i2sbi(inode);
1897         struct ptlrpc_request *req = NULL;
1898         int rc, flags = 0;
1899
1900         switch(cmd) {
1901         case FSFILT_IOC_GETFLAGS: {
1902                 struct mdt_body *body;
1903                 struct md_op_data *op_data;
1904
1905                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1906                                              0, 0, LUSTRE_OPC_ANY,
1907                                              NULL);
1908                 if (IS_ERR(op_data))
1909                         return PTR_ERR(op_data);
1910
1911                 op_data->op_valid = OBD_MD_FLFLAGS;
1912                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1913                 ll_finish_md_op_data(op_data);
1914                 if (rc) {
1915                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1916                         return -abs(rc);
1917                 }
1918
1919                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1920
1921                 flags = body->flags;
1922
1923                 ptlrpc_req_finished(req);
1924
1925                 return put_user(flags, (int *)arg);
1926         }
1927         case FSFILT_IOC_SETFLAGS: {
1928                 struct lov_stripe_md *lsm;
1929                 struct obd_info oinfo = { { { 0 } } };
1930                 struct md_op_data *op_data;
1931
1932                 if (get_user(flags, (int *)arg))
1933                         return -EFAULT;
1934
1935                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1936                                              LUSTRE_OPC_ANY, NULL);
1937                 if (IS_ERR(op_data))
1938                         return PTR_ERR(op_data);
1939
1940                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1941                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1942                 rc = md_setattr(sbi->ll_md_exp, op_data,
1943                                 NULL, 0, NULL, 0, &req, NULL);
1944                 ll_finish_md_op_data(op_data);
1945                 ptlrpc_req_finished(req);
1946                 if (rc)
1947                         return rc;
1948
1949                 inode->i_flags = ll_ext_to_inode_flags(flags);
1950
1951                 lsm = ccc_inode_lsm_get(inode);
1952                 if (!lsm_has_objects(lsm)) {
1953                         ccc_inode_lsm_put(inode, lsm);
1954                         return 0;
1955                 }
1956
1957                 OBDO_ALLOC(oinfo.oi_oa);
1958                 if (!oinfo.oi_oa) {
1959                         ccc_inode_lsm_put(inode, lsm);
1960                         return -ENOMEM;
1961                 }
1962                 oinfo.oi_md = lsm;
1963                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1964                 oinfo.oi_oa->o_flags = flags;
1965                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1966                                        OBD_MD_FLGROUP;
1967                 oinfo.oi_capa = ll_mdscapa_get(inode);
1968                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1969                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1970                 capa_put(oinfo.oi_capa);
1971                 OBDO_FREE(oinfo.oi_oa);
1972                 ccc_inode_lsm_put(inode, lsm);
1973
1974                 if (rc && rc != -EPERM && rc != -EACCES)
1975                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1976
1977                 return rc;
1978         }
1979         default:
1980                 return -ENOSYS;
1981         }
1982
1983         return 0;
1984 }
1985
1986 int ll_flush_ctx(struct inode *inode)
1987 {
1988         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1989
1990         CDEBUG(D_SEC, "flush context for user %d\n",
1991                       from_kuid(&init_user_ns, current_uid()));
1992
1993         obd_set_info_async(NULL, sbi->ll_md_exp,
1994                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1995                            0, NULL, NULL);
1996         obd_set_info_async(NULL, sbi->ll_dt_exp,
1997                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1998                            0, NULL, NULL);
1999         return 0;
2000 }
2001
2002 /* umount -f client means force down, don't save state */
2003 void ll_umount_begin(struct super_block *sb)
2004 {
2005         struct ll_sb_info *sbi = ll_s2sbi(sb);
2006         struct obd_device *obd;
2007         struct obd_ioctl_data *ioc_data;
2008
2009         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2010                sb->s_count, atomic_read(&sb->s_active));
2011
2012         obd = class_exp2obd(sbi->ll_md_exp);
2013         if (obd == NULL) {
2014                 CERROR("Invalid MDC connection handle "LPX64"\n",
2015                        sbi->ll_md_exp->exp_handle.h_cookie);
2016                 return;
2017         }
2018         obd->obd_force = 1;
2019
2020         obd = class_exp2obd(sbi->ll_dt_exp);
2021         if (obd == NULL) {
2022                 CERROR("Invalid LOV connection handle "LPX64"\n",
2023                        sbi->ll_dt_exp->exp_handle.h_cookie);
2024                 return;
2025         }
2026         obd->obd_force = 1;
2027
2028         OBD_ALLOC_PTR(ioc_data);
2029         if (ioc_data) {
2030                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2031                               sizeof(*ioc_data), ioc_data, NULL);
2032
2033                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2034                               sizeof(*ioc_data), ioc_data, NULL);
2035
2036                 OBD_FREE_PTR(ioc_data);
2037         }
2038
2039         /* Really, we'd like to wait until there are no requests outstanding,
2040          * and then continue.  For now, we just invalidate the requests,
2041          * schedule() and sleep one second if needed, and hope.
2042          */
2043         schedule();
2044 }
2045
2046 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2047 {
2048         struct ll_sb_info *sbi = ll_s2sbi(sb);
2049         char *profilenm = get_profile_name(sb);
2050         int err;
2051         __u32 read_only;
2052
2053         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2054                 read_only = *flags & MS_RDONLY;
2055                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2056                                          sizeof(KEY_READ_ONLY),
2057                                          KEY_READ_ONLY, sizeof(read_only),
2058                                          &read_only, NULL);
2059                 if (err) {
2060                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2061                                       profilenm, read_only ?
2062                                       "read-only" : "read-write", err);
2063                         return err;
2064                 }
2065
2066                 if (read_only)
2067                         sb->s_flags |= MS_RDONLY;
2068                 else
2069                         sb->s_flags &= ~MS_RDONLY;
2070
2071                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2072                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2073                                       read_only ?  "read-only" : "read-write");
2074         }
2075         return 0;
2076 }
2077
2078 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2079                   struct super_block *sb, struct lookup_intent *it)
2080 {
2081         struct ll_sb_info *sbi = NULL;
2082         struct lustre_md md;
2083         int rc;
2084
2085         LASSERT(*inode || sb);
2086         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2087         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2088                               sbi->ll_md_exp, &md);
2089         if (rc)
2090                 return rc;
2091
2092         if (*inode) {
2093                 ll_update_inode(*inode, &md);
2094         } else {
2095                 LASSERT(sb != NULL);
2096
2097                 /*
2098                  * At this point server returns to client's same fid as client
2099                  * generated for creating. So using ->fid1 is okay here.
2100                  */
2101                 LASSERT(fid_is_sane(&md.body->fid1));
2102
2103                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2104                                              sbi->ll_flags & LL_SBI_32BIT_API),
2105                                  &md);
2106                 if (*inode == NULL || IS_ERR(*inode)) {
2107 #ifdef CONFIG_FS_POSIX_ACL
2108                         if (md.posix_acl) {
2109                                 posix_acl_release(md.posix_acl);
2110                                 md.posix_acl = NULL;
2111                         }
2112 #endif
2113                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2114                         *inode = NULL;
2115                         CERROR("new_inode -fatal: rc %d\n", rc);
2116                         GOTO(out, rc);
2117                 }
2118         }
2119
2120         /* Handling piggyback layout lock.
2121          * Layout lock can be piggybacked by getattr and open request.
2122          * The lsm can be applied to inode only if it comes with a layout lock
2123          * otherwise correct layout may be overwritten, for example:
2124          * 1. proc1: mdt returns a lsm but not granting layout
2125          * 2. layout was changed by another client
2126          * 3. proc2: refresh layout and layout lock granted
2127          * 4. proc1: to apply a stale layout */
2128         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2129                 struct lustre_handle lockh;
2130                 struct ldlm_lock *lock;
2131
2132                 lockh.cookie = it->d.lustre.it_lock_handle;
2133                 lock = ldlm_handle2lock(&lockh);
2134                 LASSERT(lock != NULL);
2135                 if (ldlm_has_layout(lock)) {
2136                         struct cl_object_conf conf;
2137
2138                         memset(&conf, 0, sizeof(conf));
2139                         conf.coc_opc = OBJECT_CONF_SET;
2140                         conf.coc_inode = *inode;
2141                         conf.coc_lock = lock;
2142                         conf.u.coc_md = &md;
2143                         (void)ll_layout_conf(*inode, &conf);
2144                 }
2145                 LDLM_LOCK_PUT(lock);
2146         }
2147
2148 out:
2149         if (md.lsm != NULL)
2150                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2151         md_free_lustre_md(sbi->ll_md_exp, &md);
2152         return rc;
2153 }
2154
2155 int ll_obd_statfs(struct inode *inode, void *arg)
2156 {
2157         struct ll_sb_info *sbi = NULL;
2158         struct obd_export *exp;
2159         char *buf = NULL;
2160         struct obd_ioctl_data *data = NULL;
2161         __u32 type;
2162         __u32 flags;
2163         int len = 0, rc;
2164
2165         if (!inode || !(sbi = ll_i2sbi(inode)))
2166                 GOTO(out_statfs, rc = -EINVAL);
2167
2168         rc = obd_ioctl_getdata(&buf, &len, arg);
2169         if (rc)
2170                 GOTO(out_statfs, rc);
2171
2172         data = (void*)buf;
2173         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2174             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2175                 GOTO(out_statfs, rc = -EINVAL);
2176
2177         if (data->ioc_inllen1 != sizeof(__u32) ||
2178             data->ioc_inllen2 != sizeof(__u32) ||
2179             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2180             data->ioc_plen2 != sizeof(struct obd_uuid))
2181                 GOTO(out_statfs, rc = -EINVAL);
2182
2183         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2184         if (type & LL_STATFS_LMV)
2185                 exp = sbi->ll_md_exp;
2186         else if (type & LL_STATFS_LOV)
2187                 exp = sbi->ll_dt_exp;
2188         else
2189                 GOTO(out_statfs, rc = -ENODEV);
2190
2191         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2192         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2193         if (rc)
2194                 GOTO(out_statfs, rc);
2195 out_statfs:
2196         if (buf)
2197                 obd_ioctl_freedata(buf, len);
2198         return rc;
2199 }
2200
2201 int ll_process_config(struct lustre_cfg *lcfg)
2202 {
2203         char *ptr;
2204         void *sb;
2205         struct lprocfs_static_vars lvars;
2206         unsigned long x;
2207         int rc = 0;
2208
2209         lprocfs_llite_init_vars(&lvars);
2210
2211         /* The instance name contains the sb: lustre-client-aacfe000 */
2212         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2213         if (!ptr || !*(++ptr))
2214                 return -EINVAL;
2215         if (sscanf(ptr, "%lx", &x) != 1)
2216                 return -EINVAL;
2217         sb = (void *)x;
2218         /* This better be a real Lustre superblock! */
2219         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2220
2221         /* Note we have not called client_common_fill_super yet, so
2222            proc fns must be able to handle that! */
2223         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2224                                       lcfg, sb);
2225         if (rc > 0)
2226                 rc = 0;
2227         return(rc);
2228 }
2229
2230 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2231 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2232                                        struct inode *i1, struct inode *i2,
2233                                        const char *name, int namelen,
2234                                        int mode, __u32 opc, void *data)
2235 {
2236         LASSERT(i1 != NULL);
2237
2238         if (namelen > ll_i2sbi(i1)->ll_namelen)
2239                 return ERR_PTR(-ENAMETOOLONG);
2240
2241         if (op_data == NULL)
2242                 OBD_ALLOC_PTR(op_data);
2243
2244         if (op_data == NULL)
2245                 return ERR_PTR(-ENOMEM);
2246
2247         ll_i2gids(op_data->op_suppgids, i1, i2);
2248         op_data->op_fid1 = *ll_inode2fid(i1);
2249         op_data->op_capa1 = ll_mdscapa_get(i1);
2250
2251         if (i2) {
2252                 op_data->op_fid2 = *ll_inode2fid(i2);
2253                 op_data->op_capa2 = ll_mdscapa_get(i2);
2254         } else {
2255                 fid_zero(&op_data->op_fid2);
2256                 op_data->op_capa2 = NULL;
2257         }
2258
2259         op_data->op_name = name;
2260         op_data->op_namelen = namelen;
2261         op_data->op_mode = mode;
2262         op_data->op_mod_time = cfs_time_current_sec();
2263         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2264         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2265         op_data->op_cap = cfs_curproc_cap_pack();
2266         op_data->op_bias = 0;
2267         op_data->op_cli_flags = 0;
2268         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2269              filename_is_volatile(name, namelen, NULL))
2270                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2271         op_data->op_opc = opc;
2272         op_data->op_mds = 0;
2273         op_data->op_data = data;
2274
2275         /* If the file is being opened after mknod() (normally due to NFS)
2276          * try to use the default stripe data from parent directory for
2277          * allocating OST objects.  Try to pass the parent FID to MDS. */
2278         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2279             !ll_i2info(i2)->lli_has_smd) {
2280                 struct ll_inode_info *lli = ll_i2info(i2);
2281
2282                 spin_lock(&lli->lli_lock);
2283                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2284                         op_data->op_fid1 = lli->lli_pfid;
2285                 spin_unlock(&lli->lli_lock);
2286                 /** We ignore parent's capability temporary. */
2287         }
2288
2289         /* When called by ll_setattr_raw, file is i1. */
2290         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2291                 op_data->op_bias |= MDS_DATA_MODIFIED;
2292
2293         return op_data;
2294 }
2295
2296 void ll_finish_md_op_data(struct md_op_data *op_data)
2297 {
2298         capa_put(op_data->op_capa1);
2299         capa_put(op_data->op_capa2);
2300         OBD_FREE_PTR(op_data);
2301 }
2302
2303 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2304 {
2305         struct ll_sb_info *sbi;
2306
2307         LASSERT((seq != NULL) && (dentry != NULL));
2308         sbi = ll_s2sbi(dentry->d_sb);
2309
2310         if (sbi->ll_flags & LL_SBI_NOLCK)
2311                 seq_puts(seq, ",nolock");
2312
2313         if (sbi->ll_flags & LL_SBI_FLOCK)
2314                 seq_puts(seq, ",flock");
2315
2316         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2317                 seq_puts(seq, ",localflock");
2318
2319         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2320                 seq_puts(seq, ",user_xattr");
2321
2322         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2323                 seq_puts(seq, ",lazystatfs");
2324
2325         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2326                 seq_puts(seq, ",user_fid2path");
2327
2328         return 0;
2329 }
2330
2331 /**
2332  * Get obd name by cmd, and copy out to user space
2333  */
2334 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2335 {
2336         struct ll_sb_info *sbi = ll_i2sbi(inode);
2337         struct obd_device *obd;
2338
2339         if (cmd == OBD_IOC_GETDTNAME)
2340                 obd = class_exp2obd(sbi->ll_dt_exp);
2341         else if (cmd == OBD_IOC_GETMDNAME)
2342                 obd = class_exp2obd(sbi->ll_md_exp);
2343         else
2344                 return -EINVAL;
2345
2346         if (!obd)
2347                 return -ENOENT;
2348
2349         if (copy_to_user((void *)arg, obd->obd_name,
2350                              strlen(obd->obd_name) + 1))
2351                 return -EFAULT;
2352
2353         return 0;
2354 }
2355
2356 /**
2357  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2358  * fsname will be returned in this buffer; otherwise, a static buffer will be
2359  * used to store the fsname and returned to caller.
2360  */
2361 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2362 {
2363         static char fsname_static[MTI_NAME_MAXLEN];
2364         struct lustre_sb_info *lsi = s2lsi(sb);
2365         char *ptr;
2366         int len;
2367
2368         if (buf == NULL) {
2369                 /* this means the caller wants to use static buffer
2370                  * and it doesn't care about race. Usually this is
2371                  * in error reporting path */
2372                 buf = fsname_static;
2373                 buflen = sizeof(fsname_static);
2374         }
2375
2376         len = strlen(lsi->lsi_lmd->lmd_profile);
2377         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2378         if (ptr && (strcmp(ptr, "-client") == 0))
2379                 len -= 7;
2380
2381         if (unlikely(len >= buflen))
2382                 len = buflen - 1;
2383         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2384         buf[len] = '\0';
2385
2386         return buf;
2387 }
2388
2389 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2390 {
2391         char *path = NULL;
2392
2393         struct path p;
2394
2395         p.dentry = dentry;
2396         p.mnt = current->fs->root.mnt;
2397         path_get(&p);
2398         path = d_path(&p, buf, bufsize);
2399         path_put(&p);
2400
2401         return path;
2402 }
2403
2404 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2405 {
2406         char *buf, *path = NULL;
2407         struct dentry *dentry = NULL;
2408         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2409
2410         /* this can be called inside spin lock so use GFP_ATOMIC. */
2411         buf = (char *)__get_free_page(GFP_ATOMIC);
2412         if (buf != NULL) {
2413                 dentry = d_find_alias(page->mapping->host);
2414                 if (dentry != NULL)
2415                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2416         }
2417
2418         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2419               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2420               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2421               PFID(&obj->cob_header.coh_lu.loh_fid),
2422               (path && !IS_ERR(path)) ? path : "", ioret);
2423
2424         if (dentry != NULL)
2425                 dput(dentry);
2426
2427         if (buf != NULL)
2428                 free_page((unsigned long)buf);
2429 }