lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/types.h>
  45 #include <linux/version.h>
  46 #include <linux/mm.h>
  47
  48 #include <lustre_lite.h>
  49 #include <lustre_ha.h>
  50 #include <lustre_dlm.h>
  51 #include <lprocfs_status.h>
  52 #include <lustre_disk.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55 #include <cl_object.h>
  56 #include <obd_cksum.h>
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60
  61 CFS_LIST_HEAD(ll_super_blocks);
  62 DEFINE_SPINLOCK(ll_sb_lock);
  63
  64 #ifndef MS_HAS_NEW_AOPS
  65 extern struct address_space_operations ll_aops;
  66 #else
  67 extern struct address_space_operations_ext ll_aops;
  68 #endif
  69
  70 #ifndef log2
  71 #define log2(n) ffz(~(n))
  72 #endif
  73
  74 static struct ll_sb_info *ll_init_sbi(void)
  75 {
  76         struct ll_sb_info *sbi = NULL;
  77         unsigned long pages;
  78         unsigned long lru_page_max;
  79         struct sysinfo si;
  80         class_uuid_t uuid;
  81         int i;
  82         ENTRY;
  83
  84         OBD_ALLOC(sbi, sizeof(*sbi));
  85         if (!sbi)
  86                 RETURN(NULL);
  87
  88         spin_lock_init(&sbi->ll_lock);
  89         mutex_init(&sbi->ll_lco.lco_lock);
  90         spin_lock_init(&sbi->ll_pp_extent_lock);
  91         spin_lock_init(&sbi->ll_process_lock);
  92         sbi->ll_rw_stats_on = 0;
  93
  94         si_meminfo(&si);
  95         pages = si.totalram - si.totalhigh;
  96         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512) {
  97                 lru_page_max = pages / 2;
  98         } else {
  99                 lru_page_max = (pages / 4) * 3;
 100         }
 101
 102         /* initialize lru data */
 103         cfs_atomic_set(&sbi->ll_cache.ccc_users, 0);
 104         sbi->ll_cache.ccc_lru_max = lru_page_max;
 105         cfs_atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
 106         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 107         CFS_INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 108
 109         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 110                                            SBI_DEFAULT_READAHEAD_MAX);
 111         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 112         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 113                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 114         CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
 115         CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 116
 117         ll_generate_random_uuid(uuid);
 118         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 119         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 120
 121         spin_lock(&ll_sb_lock);
 122         cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
 123         spin_unlock(&ll_sb_lock);
 124
 125         sbi->ll_flags |= LL_SBI_VERBOSE;
 126 #ifdef ENABLE_CHECKSUM
 127         sbi->ll_flags |= LL_SBI_CHECKSUM;
 128 #endif
 129
 130 #ifdef HAVE_LRU_RESIZE_SUPPORT
 131         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 132 #endif
 133
 134         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 135                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 136                                pp_r_hist.oh_lock);
 137                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 138                                pp_w_hist.oh_lock);
 139         }
 140
 141         /* metadata statahead is enabled by default */
 142         sbi->ll_sa_max = LL_SA_RPC_DEF;
 143         cfs_atomic_set(&sbi->ll_sa_total, 0);
 144         cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 145         cfs_atomic_set(&sbi->ll_agl_total, 0);
 146         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 147
 148         RETURN(sbi);
 149 }
 150
 151 void ll_free_sbi(struct super_block *sb)
 152 {
 153         struct ll_sb_info *sbi = ll_s2sbi(sb);
 154         ENTRY;
 155
 156         if (sbi != NULL) {
 157                 spin_lock(&ll_sb_lock);
 158                 cfs_list_del(&sbi->ll_list);
 159                 spin_unlock(&ll_sb_lock);
 160                 OBD_FREE(sbi, sizeof(*sbi));
 161         }
 162         EXIT;
 163 }
 164
 165 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 166                                     struct vfsmount *mnt)
 167 {
 168         struct inode *root = 0;
 169         struct ll_sb_info *sbi = ll_s2sbi(sb);
 170         struct obd_device *obd;
 171         struct obd_capa *oc = NULL;
 172         struct obd_statfs *osfs = NULL;
 173         struct ptlrpc_request *request = NULL;
 174         struct obd_connect_data *data = NULL;
 175         struct obd_uuid *uuid;
 176         struct md_op_data *op_data;
 177         struct lustre_md lmd;
 178         obd_valid valid;
 179         int size, err, checksum;
 180         ENTRY;
 181
 182         obd = class_name2obd(md);
 183         if (!obd) {
 184                 CERROR("MD %s: not setup or attached\n", md);
 185                 RETURN(-EINVAL);
 186         }
 187
 188         OBD_ALLOC_PTR(data);
 189         if (data == NULL)
 190                 RETURN(-ENOMEM);
 191
 192         OBD_ALLOC_PTR(osfs);
 193         if (osfs == NULL) {
 194                 OBD_FREE_PTR(data);
 195                 RETURN(-ENOMEM);
 196         }
 197
 198         if (proc_lustre_fs_root) {
 199                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 200                                                   dt, md);
 201                 if (err < 0)
 202                         CERROR("could not register mount in /proc/fs/lustre\n");
 203         }
 204
 205         /* indicate the features supported by this client */
 206         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 207                                   OBD_CONNECT_ATTRFID  |
 208                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 209                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 210                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 211                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 212                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 213                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 214                                   OBD_CONNECT_EINPROGRESS |
 215                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 216                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS |
 217                                   OBD_CONNECT_MAX_EASIZE |
 218                                   OBD_CONNECT_FLOCK_DEAD;
 219
 220         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 221                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 222
 223 #ifdef HAVE_LRU_RESIZE_SUPPORT
 224         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 225                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 226 #endif
 227 #ifdef CONFIG_FS_POSIX_ACL
 228         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 229 #endif
 230
 231         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 232                 /* flag mdc connection as lightweight, only used for test
 233                  * purpose, use with care */
 234                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 235
 236         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 237         data->ocd_version = LUSTRE_VERSION_CODE;
 238
 239         if (sb->s_flags & MS_RDONLY)
 240                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 241         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 242                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 243
 244 #ifdef HAVE_MS_FLOCK_LOCK
 245         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 246         sb->s_flags |= MS_FLOCK_LOCK;
 247 #endif
 248 #ifdef MS_HAS_NEW_AOPS
 249         sb->s_flags |= MS_HAS_NEW_AOPS;
 250 #endif
 251
 252         if (sbi->ll_flags & LL_SBI_FLOCK)
 253                 sbi->ll_fop = &ll_file_operations_flock;
 254         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 255                 sbi->ll_fop = &ll_file_operations;
 256         else
 257                 sbi->ll_fop = &ll_file_operations_noflock;
 258
 259         /* real client */
 260         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 261         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 262                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 263
 264         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 265
 266         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
 267         if (err == -EBUSY) {
 268                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
 269                                    "recovery, of which this client is not a "
 270                                    "part. Please wait for recovery to complete,"
 271                                    " abort, or time out.\n", md);
 272                 GOTO(out, err);
 273         } else if (err) {
 274                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 275                 GOTO(out, err);
 276         }
 277
 278         sbi->ll_md_exp->exp_connect_data = *data;
 279
 280         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 281                            LUSTRE_SEQ_METADATA);
 282         if (err) {
 283                 CERROR("%s: Can't init metadata layer FID infrastructure, "
 284                        "rc = %d\n", sbi->ll_md_exp->exp_obd->obd_name, err);
 285                 GOTO(out_md, err);
 286         }
 287
 288         /* For mount, we only need fs info from MDT0, and also in DNE, it
 289          * can make sure the client can be mounted as long as MDT0 is
 290          * avaible */
 291         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 292                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 293                         OBD_STATFS_FOR_MDT0);
 294         if (err)
 295                 GOTO(out_md_fid, err);
 296
 297         /* This needs to be after statfs to ensure connect has finished.
 298          * Note that "data" does NOT contain the valid connect reply.
 299          * If connecting to a 1.8 server there will be no LMV device, so
 300          * we can access the MDC export directly and exp_connect_flags will
 301          * be non-zero, but if accessing an upgraded 2.1 server it will
 302          * have the correct flags filled in.
 303          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 304         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 305         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 306             valid != CLIENT_CONNECT_MDT_REQD) {
 307                 char *buf;
 308
 309                 OBD_ALLOC_WAIT(buf, PAGE_CACHE_SIZE);
 310                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 311                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 312                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
 313                                    "feature(s) needed for correct operation "
 314                                    "of this client (%s). Please upgrade "
 315                                    "server or downgrade client.\n",
 316                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 317                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 318                 GOTO(out_md_fid, err = -EPROTO);
 319         }
 320
 321         size = sizeof(*data);
 322         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 323                            KEY_CONN_DATA,  &size, data, NULL);
 324         if (err) {
 325                 CERROR("%s: Get connect data failed: rc = %d\n",
 326                        sbi->ll_md_exp->exp_obd->obd_name, err);
 327                 GOTO(out_md_fid, err);
 328         }
 329
 330         LASSERT(osfs->os_bsize);
 331         sb->s_blocksize = osfs->os_bsize;
 332         sb->s_blocksize_bits = log2(osfs->os_bsize);
 333         sb->s_magic = LL_SUPER_MAGIC;
 334         sb->s_maxbytes = MAX_LFS_FILESIZE;
 335         sbi->ll_namelen = osfs->os_namelen;
 336         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 337
 338         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 339             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 340                 LCONSOLE_INFO("Disabling user_xattr feature because "
 341                               "it is not supported on the server\n");
 342                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 343         }
 344
 345         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 346 #ifdef MS_POSIXACL
 347                 sb->s_flags |= MS_POSIXACL;
 348 #endif
 349                 sbi->ll_flags |= LL_SBI_ACL;
 350         } else {
 351                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 352 #ifdef MS_POSIXACL
 353                 sb->s_flags &= ~MS_POSIXACL;
 354 #endif
 355                 sbi->ll_flags &= ~LL_SBI_ACL;
 356         }
 357
 358         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 359                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 360                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 361                         LCONSOLE_INFO("client is set as remote by default.\n");
 362                 }
 363         } else {
 364                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 365                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 366                         LCONSOLE_INFO("client claims to be remote, but server "
 367                                       "rejected, forced to be local.\n");
 368                 }
 369         }
 370
 371         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 372                 LCONSOLE_INFO("client enabled MDS capability!\n");
 373                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 374         }
 375
 376         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 377                 LCONSOLE_INFO("client enabled OSS capability!\n");
 378                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 379         }
 380
 381         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 382                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 383
 384         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 385                 sbi->ll_md_brw_size = data->ocd_brw_size;
 386         else
 387                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 388
 389         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 390                 LCONSOLE_INFO("Layout lock feature supported.\n");
 391                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 392         }
 393
 394         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 395                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 396                         LCONSOLE_INFO("%s: disabling xattr cache due to "
 397                                       "unknown maximum xattr size.\n", dt);
 398                 } else {
 399                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 400                         sbi->ll_xattr_cache_enabled = 1;
 401                 }
 402         }
 403
 404         obd = class_name2obd(dt);
 405         if (!obd) {
 406                 CERROR("DT %s: not setup or attached\n", dt);
 407                 GOTO(out_md_fid, err = -ENODEV);
 408         }
 409
 410         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 411                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 412                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 413                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 414                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 415                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 416                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 417                                   OBD_CONNECT_MAXBYTES |
 418                                   OBD_CONNECT_EINPROGRESS |
 419                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 420                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 421
 422         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 423                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 424
 425         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 426                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 427                  * disabled by default, because it can still be enabled on the
 428                  * fly via /proc. As a consequence, we still need to come to an
 429                  * agreement on the supported algorithms at connect time */
 430                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 431
 432                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 433                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 434                 else
 435                         data->ocd_cksum_types = cksum_types_supported_client();
 436         }
 437
 438 #ifdef HAVE_LRU_RESIZE_SUPPORT
 439         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 440 #endif
 441         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 442                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 443
 444         CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d "
 445                "ocd_grant: %d\n", data->ocd_connect_flags,
 446                data->ocd_version, data->ocd_grant);
 447
 448         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 449         obd->obd_upcall.onu_upcall = cl_ocd_update;
 450
 451         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 452
 453         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 454                           NULL);
 455         if (err == -EBUSY) {
 456                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing "
 457                                    "recovery, of which this client is not a "
 458                                    "part.  Please wait for recovery to "
 459                                    "complete, abort, or time out.\n", dt);
 460                 GOTO(out_md, err);
 461         } else if (err) {
 462                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 463                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 464                 GOTO(out_md, err);
 465         }
 466
 467         sbi->ll_dt_exp->exp_connect_data = *data;
 468
 469         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 470                            LUSTRE_SEQ_METADATA);
 471         if (err) {
 472                 CERROR("%s: Can't init data layer FID infrastructure, "
 473                        "rc = %d\n", sbi->ll_dt_exp->exp_obd->obd_name, err);
 474                 GOTO(out_dt, err);
 475         }
 476
 477         mutex_lock(&sbi->ll_lco.lco_lock);
 478         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 479         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 480         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 481         mutex_unlock(&sbi->ll_lco.lco_lock);
 482
 483         fid_zero(&sbi->ll_root_fid);
 484         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 485         if (err) {
 486                 CERROR("cannot mds_connect: rc = %d\n", err);
 487                 GOTO(out_lock_cn_cb, err);
 488         }
 489         if (!fid_is_sane(&sbi->ll_root_fid)) {
 490                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 491                        sbi->ll_md_exp->exp_obd->obd_name,
 492                        PFID(&sbi->ll_root_fid));
 493                 GOTO(out_lock_cn_cb, err = -EINVAL);
 494         }
 495         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 496
 497         sb->s_op = &lustre_super_operations;
 498 #if THREAD_SIZE >= 8192 /*b=17630*/
 499         sb->s_export_op = &lustre_export_operations;
 500 #endif
 501
 502         /* make root inode
 503          * XXX: move this to after cbd setup? */
 504         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 505         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 506                 valid |= OBD_MD_FLRMTPERM;
 507         else if (sbi->ll_flags & LL_SBI_ACL)
 508                 valid |= OBD_MD_FLACL;
 509
 510         OBD_ALLOC_PTR(op_data);
 511         if (op_data == NULL)
 512                 GOTO(out_lock_cn_cb, err = -ENOMEM);
 513
 514         op_data->op_fid1 = sbi->ll_root_fid;
 515         op_data->op_mode = 0;
 516         op_data->op_capa1 = oc;
 517         op_data->op_valid = valid;
 518
 519         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 520         if (oc)
 521                 capa_put(oc);
 522         OBD_FREE_PTR(op_data);
 523         if (err) {
 524                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 525                        sbi->ll_md_exp->exp_obd->obd_name, err);
 526                 GOTO(out_lock_cn_cb, err);
 527         }
 528
 529         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 530                                sbi->ll_md_exp, &lmd);
 531         if (err) {
 532                 CERROR("failed to understand root inode md: rc = %d\n", err);
 533                 ptlrpc_req_finished(request);
 534                 GOTO(out_lock_cn_cb, err);
 535         }
 536
 537         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 538         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 539                                             sbi->ll_flags & LL_SBI_32BIT_API),
 540                        &lmd);
 541         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 542         ptlrpc_req_finished(request);
 543
 544         if (root == NULL || IS_ERR(root)) {
 545                 if (lmd.lsm)
 546                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 547 #ifdef CONFIG_FS_POSIX_ACL
 548                 if (lmd.posix_acl) {
 549                         posix_acl_release(lmd.posix_acl);
 550                         lmd.posix_acl = NULL;
 551                 }
 552 #endif
 553                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 554                 root = NULL;
 555                 CERROR("lustre_lite: bad iget4 for root\n");
 556                 GOTO(out_root, err);
 557         }
 558
 559         err = ll_close_thread_start(&sbi->ll_lcq);
 560         if (err) {
 561                 CERROR("cannot start close thread: rc %d\n", err);
 562                 GOTO(out_root, err);
 563         }
 564
 565 #ifdef CONFIG_FS_POSIX_ACL
 566         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 567                 rct_init(&sbi->ll_rct);
 568                 et_init(&sbi->ll_et);
 569         }
 570 #endif
 571
 572         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 573         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 574                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 575                                  NULL);
 576         cl_sb_init(sb);
 577
 578         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 579                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 580                                  &sbi->ll_cache, NULL);
 581
 582         sb->s_root = d_make_root(root);
 583         if (sb->s_root == NULL) {
 584                 CERROR("%s: can't make root dentry\n",
 585                         ll_get_fsname(sb, NULL, 0));
 586                 GOTO(out_root, err = -ENOMEM);
 587         }
 588 #ifdef HAVE_DCACHE_LOCK
 589         sb->s_root->d_op = &ll_d_ops;
 590 #endif
 591
 592         sbi->ll_sdev_orig = sb->s_dev;
 593
 594         /* We set sb->s_dev equal on all lustre clients in order to support
 595          * NFS export clustering.  NFSD requires that the FSID be the same
 596          * on all clients. */
 597         /* s_dev is also used in lt_compare() to compare two fs, but that is
 598          * only a node-local comparison. */
 599         uuid = obd_get_uuid(sbi->ll_md_exp);
 600         if (uuid != NULL) {
 601                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 602                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 603         }
 604
 605         if (data != NULL)
 606                 OBD_FREE_PTR(data);
 607         if (osfs != NULL)
 608                 OBD_FREE_PTR(osfs);
 609
 610         RETURN(err);
 611 out_root:
 612         if (root)
 613                 iput(root);
 614 out_lock_cn_cb:
 615         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 616 out_dt:
 617         obd_disconnect(sbi->ll_dt_exp);
 618         sbi->ll_dt_exp = NULL;
 619         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 620         obd_zombie_barrier();
 621 out_md_fid:
 622         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 623 out_md:
 624         obd_disconnect(sbi->ll_md_exp);
 625         sbi->ll_md_exp = NULL;
 626 out:
 627         if (data != NULL)
 628                 OBD_FREE_PTR(data);
 629         if (osfs != NULL)
 630                 OBD_FREE_PTR(osfs);
 631         lprocfs_unregister_mountpoint(sbi);
 632         return err;
 633 }
 634
 635 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 636 {
 637         int size, rc;
 638
 639         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 640         size = sizeof(int);
 641         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 642                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 643         if (rc)
 644                 CERROR("Get max mdsize error rc %d \n", rc);
 645
 646         RETURN(rc);
 647 }
 648
 649 void ll_dump_inode(struct inode *inode)
 650 {
 651         struct ll_d_hlist_node *tmp;
 652         int dentry_count = 0;
 653
 654         LASSERT(inode != NULL);
 655
 656         ll_d_hlist_for_each(tmp, &inode->i_dentry)
 657                 dentry_count++;
 658
 659         CERROR("inode %p dump: dev=%s ino=%lu mode=%o count=%u, %d dentries\n",
 660                inode, ll_i2mdexp(inode)->exp_obd->obd_name, inode->i_ino,
 661                inode->i_mode, atomic_read(&inode->i_count), dentry_count);
 662 }
 663
 664 void lustre_dump_dentry(struct dentry *dentry, int recur)
 665 {
 666         struct list_head *tmp;
 667         int subdirs = 0;
 668
 669         LASSERT(dentry != NULL);
 670
 671         list_for_each(tmp, &dentry->d_subdirs)
 672                 subdirs++;
 673
 674         CERROR("dentry %p dump: name=%.*s parent=%.*s (%p), inode=%p, count=%u,"
 675                " flags=0x%x, fsdata=%p, %d subdirs\n", dentry,
 676                dentry->d_name.len, dentry->d_name.name,
 677                dentry->d_parent->d_name.len, dentry->d_parent->d_name.name,
 678                dentry->d_parent, dentry->d_inode, d_refcount(dentry),
 679                dentry->d_flags, dentry->d_fsdata, subdirs);
 680         if (dentry->d_inode != NULL)
 681                 ll_dump_inode(dentry->d_inode);
 682
 683         if (recur == 0)
 684                 return;
 685
 686         list_for_each(tmp, &dentry->d_subdirs) {
 687                 struct dentry *d = list_entry(tmp, struct dentry, d_u.d_child);
 688                 lustre_dump_dentry(d, recur - 1);
 689         }
 690 }
 691
 692 void client_common_put_super(struct super_block *sb)
 693 {
 694         struct ll_sb_info *sbi = ll_s2sbi(sb);
 695         ENTRY;
 696
 697 #ifdef CONFIG_FS_POSIX_ACL
 698         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 699                 et_fini(&sbi->ll_et);
 700                 rct_fini(&sbi->ll_rct);
 701         }
 702 #endif
 703
 704         ll_close_thread_shutdown(sbi->ll_lcq);
 705
 706         cl_sb_fini(sb);
 707
 708         cfs_list_del(&sbi->ll_conn_chain);
 709
 710         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 711         obd_disconnect(sbi->ll_dt_exp);
 712         sbi->ll_dt_exp = NULL;
 713         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 714          * see LU-2543. */
 715         obd_zombie_barrier();
 716
 717         lprocfs_unregister_mountpoint(sbi);
 718
 719         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 720         obd_disconnect(sbi->ll_md_exp);
 721         sbi->ll_md_exp = NULL;
 722
 723         EXIT;
 724 }
 725
 726 void ll_kill_super(struct super_block *sb)
 727 {
 728         struct ll_sb_info *sbi;
 729
 730         ENTRY;
 731
 732         /* not init sb ?*/
 733         if (!(sb->s_flags & MS_ACTIVE))
 734                 return;
 735
 736         sbi = ll_s2sbi(sb);
 737         /* we need restore s_dev from changed for clustred NFS before put_super
 738          * because new kernels have cached s_dev and change sb->s_dev in
 739          * put_super not affected real removing devices */
 740         if (sbi) {
 741                 sb->s_dev = sbi->ll_sdev_orig;
 742                 sbi->ll_umounting = 1;
 743         }
 744         EXIT;
 745 }
 746
 747 char *ll_read_opt(const char *opt, char *data)
 748 {
 749         char *value;
 750         char *retval;
 751         ENTRY;
 752
 753         CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
 754         if (strncmp(opt, data, strlen(opt)))
 755                 RETURN(NULL);
 756         if ((value = strchr(data, '=')) == NULL)
 757                 RETURN(NULL);
 758
 759         value++;
 760         OBD_ALLOC(retval, strlen(value) + 1);
 761         if (!retval) {
 762                 CERROR("out of memory!\n");
 763                 RETURN(NULL);
 764         }
 765
 766         memcpy(retval, value, strlen(value)+1);
 767         CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
 768         RETURN(retval);
 769 }
 770
 771 static inline int ll_set_opt(const char *opt, char *data, int fl)
 772 {
 773         if (strncmp(opt, data, strlen(opt)) != 0)
 774                 return(0);
 775         else
 776                 return(fl);
 777 }
 778
 779 /* non-client-specific mount options are parsed in lmd_parse */
 780 static int ll_options(char *options, int *flags)
 781 {
 782         int tmp;
 783         char *s1 = options, *s2;
 784         ENTRY;
 785
 786         if (!options)
 787                 RETURN(0);
 788
 789         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 790
 791         while (*s1) {
 792                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 793                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 794                 if (tmp) {
 795                         *flags |= tmp;
 796                         goto next;
 797                 }
 798                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 799                 if (tmp) {
 800                         *flags |= tmp;
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 804                 if (tmp) {
 805                         *flags |= tmp;
 806                         goto next;
 807                 }
 808                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 809                 if (tmp) {
 810                         *flags &= ~tmp;
 811                         goto next;
 812                 }
 813                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 814                 if (tmp) {
 815                         *flags |= tmp;
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 819                 if (tmp) {
 820                         *flags &= ~tmp;
 821                         goto next;
 822                 }
 823 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 5, 50, 0)
 824                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
 825                 if (tmp) {
 826                         /* Ignore deprecated mount option.  The client will
 827                          * always try to mount with ACL support, whether this
 828                          * is used depends on whether server supports it. */
 829                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 830                                                   "mount option 'acl'.\n");
 831                         goto next;
 832                 }
 833                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
 834                 if (tmp) {
 835                         LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
 836                                                   "mount option 'noacl'.\n");
 837                         goto next;
 838                 }
 839 #else
 840 #warning "{no}acl options have been deprecated since 1.8, please remove them"
 841 #endif
 842                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 843                 if (tmp) {
 844                         *flags |= tmp;
 845                         goto next;
 846                 }
 847                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 848                 if (tmp) {
 849                         *flags |= tmp;
 850                         goto next;
 851                 }
 852                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 853                 if (tmp) {
 854                         *flags &= ~tmp;
 855                         goto next;
 856                 }
 857
 858                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 859                 if (tmp) {
 860                         *flags |= tmp;
 861                         goto next;
 862                 }
 863                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 864                 if (tmp) {
 865                         *flags &= ~tmp;
 866                         goto next;
 867                 }
 868                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 869                 if (tmp) {
 870                         *flags |= tmp;
 871                         goto next;
 872                 }
 873                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 874                 if (tmp) {
 875                         *flags &= ~tmp;
 876                         goto next;
 877                 }
 878                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 879                 if (tmp) {
 880                         *flags |= tmp;
 881                         goto next;
 882                 }
 883                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 884                 if (tmp) {
 885                         *flags &= ~tmp;
 886                         goto next;
 887                 }
 888                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 889                 if (tmp) {
 890                         *flags |= tmp;
 891                         goto next;
 892                 }
 893                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 894                 if (tmp) {
 895                         *flags |= tmp;
 896                         goto next;
 897                 }
 898                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 899                 if (tmp) {
 900                         *flags |= tmp;
 901                         goto next;
 902                 }
 903                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 904                 if (tmp) {
 905                         *flags &= ~tmp;
 906                         goto next;
 907                 }
 908                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 909                                    s1);
 910                 RETURN(-EINVAL);
 911
 912 next:
 913                 /* Find next opt */
 914                 s2 = strchr(s1, ',');
 915                 if (s2 == NULL)
 916                         break;
 917                 s1 = s2 + 1;
 918         }
 919         RETURN(0);
 920 }
 921
 922 void ll_lli_init(struct ll_inode_info *lli)
 923 {
 924         lli->lli_inode_magic = LLI_INODE_MAGIC;
 925         lli->lli_flags = 0;
 926         lli->lli_ioepoch = 0;
 927         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 928         spin_lock_init(&lli->lli_lock);
 929         lli->lli_posix_acl = NULL;
 930         lli->lli_remote_perms = NULL;
 931         mutex_init(&lli->lli_rmtperm_mutex);
 932         /* Do not set lli_fid, it has been initialized already. */
 933         fid_zero(&lli->lli_pfid);
 934         CFS_INIT_LIST_HEAD(&lli->lli_close_list);
 935         CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
 936         cfs_atomic_set(&lli->lli_open_count, 0);
 937         lli->lli_mds_capa = NULL;
 938         lli->lli_rmtperm_time = 0;
 939         lli->lli_pending_och = NULL;
 940         lli->lli_mds_read_och = NULL;
 941         lli->lli_mds_write_och = NULL;
 942         lli->lli_mds_exec_och = NULL;
 943         lli->lli_open_fd_read_count = 0;
 944         lli->lli_open_fd_write_count = 0;
 945         lli->lli_open_fd_exec_count = 0;
 946         mutex_init(&lli->lli_och_mutex);
 947         spin_lock_init(&lli->lli_agl_lock);
 948         lli->lli_has_smd = false;
 949         lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
 950         lli->lli_clob = NULL;
 951
 952         init_rwsem(&lli->lli_xattrs_list_rwsem);
 953         mutex_init(&lli->lli_xattrs_enq_lock);
 954
 955         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 956         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 957                 mutex_init(&lli->lli_readdir_mutex);
 958                 lli->lli_opendir_key = NULL;
 959                 lli->lli_sai = NULL;
 960                 lli->lli_def_acl = NULL;
 961                 spin_lock_init(&lli->lli_sa_lock);
 962                 lli->lli_opendir_pid = 0;
 963         } else {
 964                 sema_init(&lli->lli_size_sem, 1);
 965                 lli->lli_size_sem_owner = NULL;
 966                 lli->lli_symlink_name = NULL;
 967                 init_rwsem(&lli->lli_trunc_sem);
 968                 mutex_init(&lli->lli_write_mutex);
 969                 init_rwsem(&lli->lli_glimpse_sem);
 970                 lli->lli_glimpse_time = 0;
 971                 CFS_INIT_LIST_HEAD(&lli->lli_agl_list);
 972                 lli->lli_agl_index = 0;
 973                 lli->lli_async_rc = 0;
 974                 lli->lli_volatile = false;
 975         }
 976         mutex_init(&lli->lli_layout_mutex);
 977 }
 978
 979 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 980 {
 981         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 982
 983         bdi->name = "lustre";
 984         return bdi_register(bdi, NULL, "lustre-%d",
 985                             atomic_inc_return(&ll_bdi_num));
 986 }
 987
 988 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 989 {
 990         struct lustre_profile *lprof = NULL;
 991         struct lustre_sb_info *lsi = s2lsi(sb);
 992         struct ll_sb_info *sbi;
 993         char  *dt = NULL, *md = NULL;
 994         char  *profilenm = get_profile_name(sb);
 995         struct config_llog_instance *cfg;
 996         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 997         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 998         int    err;
 999         ENTRY;
1000
1001         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
1002
1003         OBD_ALLOC_PTR(cfg);
1004         if (cfg == NULL)
1005                 RETURN(-ENOMEM);
1006
1007         cfs_module_get();
1008
1009         /* client additional sb info */
1010         lsi->lsi_llsbi = sbi = ll_init_sbi();
1011         if (!sbi) {
1012                 cfs_module_put(THIS_MODULE);
1013                 OBD_FREE_PTR(cfg);
1014                 RETURN(-ENOMEM);
1015         }
1016
1017         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
1018         if (err)
1019                 GOTO(out_free, err);
1020
1021         err = bdi_init(&lsi->lsi_bdi);
1022         if (err)
1023                 GOTO(out_free, err);
1024         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
1025         lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
1026         err = ll_bdi_register(&lsi->lsi_bdi);
1027         if (err)
1028                 GOTO(out_free, err);
1029
1030         sb->s_bdi = &lsi->lsi_bdi;
1031 #ifndef HAVE_DCACHE_LOCK
1032         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
1033         sb->s_d_op = &ll_d_ops;
1034 #endif
1035
1036         /* Generate a string unique to this super, in case some joker tries
1037            to mount the same fs at two mount points.
1038            Use the address of the super itself.*/
1039         cfg->cfg_instance = sb;
1040         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
1041         cfg->cfg_callback = class_config_llog_handler;
1042         /* set up client obds */
1043         err = lustre_process_log(sb, profilenm, cfg);
1044         if (err < 0) {
1045                 CERROR("Unable to process log: %d\n", err);
1046                 GOTO(out_free, err);
1047         }
1048
1049         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
1050         lprof = class_get_profile(profilenm);
1051         if (lprof == NULL) {
1052                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
1053                                    " read from the MGS.  Does that filesystem "
1054                                    "exist?\n", profilenm);
1055                 GOTO(out_free, err = -EINVAL);
1056         }
1057         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
1058                lprof->lp_md, lprof->lp_dt);
1059
1060         OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
1061         if (!dt)
1062                 GOTO(out_free, err = -ENOMEM);
1063         sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
1064
1065         OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
1066         if (!md)
1067                 GOTO(out_free, err = -ENOMEM);
1068         sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
1069
1070         /* connections, registrations, sb setup */
1071         err = client_common_fill_super(sb, md, dt, mnt);
1072
1073 out_free:
1074         if (md)
1075                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
1076         if (dt)
1077                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1078         if (err)
1079                 ll_put_super(sb);
1080         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1081                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1082
1083         OBD_FREE_PTR(cfg);
1084         RETURN(err);
1085 } /* ll_fill_super */
1086
1087
1088 void lu_context_keys_dump(void);
1089
1090 void ll_put_super(struct super_block *sb)
1091 {
1092         struct config_llog_instance cfg, params_cfg;
1093         struct obd_device *obd;
1094         struct lustre_sb_info *lsi = s2lsi(sb);
1095         struct ll_sb_info *sbi = ll_s2sbi(sb);
1096         char *profilenm = get_profile_name(sb);
1097         int force = 1, next;
1098         ENTRY;
1099
1100         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1101
1102         ll_print_capa_stat(sbi);
1103
1104         cfg.cfg_instance = sb;
1105         lustre_end_log(sb, profilenm, &cfg);
1106
1107         params_cfg.cfg_instance = sb;
1108         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1109
1110         if (sbi->ll_md_exp) {
1111                 obd = class_exp2obd(sbi->ll_md_exp);
1112                 if (obd)
1113                         force = obd->obd_force;
1114         }
1115
1116         /* We need to set force before the lov_disconnect in
1117            lustre_common_put_super, since l_d cleans up osc's as well. */
1118         if (force) {
1119                 next = 0;
1120                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1121                                                      &next)) != NULL) {
1122                         obd->obd_force = force;
1123                 }
1124         }
1125
1126         if (sbi->ll_lcq) {
1127                 /* Only if client_common_fill_super succeeded */
1128                 client_common_put_super(sb);
1129         }
1130
1131         next = 0;
1132         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
1133                 class_manual_cleanup(obd);
1134         }
1135
1136         if (sbi->ll_flags & LL_SBI_VERBOSE)
1137                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1138
1139         if (profilenm)
1140                 class_del_profile(profilenm);
1141
1142         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1143                 bdi_destroy(&lsi->lsi_bdi);
1144                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1145         }
1146
1147         ll_free_sbi(sb);
1148         lsi->lsi_llsbi = NULL;
1149
1150         lustre_common_put_super(sb);
1151
1152         cfs_module_put(THIS_MODULE);
1153
1154         EXIT;
1155 } /* client_put_super */
1156
1157 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1158 {
1159         struct inode *inode = NULL;
1160
1161         /* NOTE: we depend on atomic igrab() -bzzz */
1162         lock_res_and_lock(lock);
1163         if (lock->l_resource->lr_lvb_inode) {
1164                 struct ll_inode_info * lli;
1165                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1166                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1167                         inode = igrab(lock->l_resource->lr_lvb_inode);
1168                 } else {
1169                         inode = lock->l_resource->lr_lvb_inode;
1170                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1171                                          D_WARNING, lock, "lr_lvb_inode %p is "
1172                                          "bogus: magic %08x",
1173                                          lock->l_resource->lr_lvb_inode,
1174                                          lli->lli_inode_magic);
1175                         inode = NULL;
1176                 }
1177         }
1178         unlock_res_and_lock(lock);
1179         return inode;
1180 }
1181
1182 struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
1183 {
1184         struct inode *inode = NULL;
1185         /* NOTE: we depend on atomic igrab() -bzzz */
1186         lock_res_and_lock(lock);
1187         if (lock->l_ast_data) {
1188                 struct ll_inode_info *lli = ll_i2info(lock->l_ast_data);
1189                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1190                         inode = igrab(lock->l_ast_data);
1191                 } else {
1192                         inode = lock->l_ast_data;
1193                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1194                                          D_WARNING, lock, "l_ast_data %p is "
1195                                          "bogus: magic %08x", lock->l_ast_data,
1196                                          lli->lli_inode_magic);
1197                         inode = NULL;
1198                 }
1199         }
1200         unlock_res_and_lock(lock);
1201         return inode;
1202 }
1203
1204 void ll_clear_inode(struct inode *inode)
1205 {
1206         struct ll_inode_info *lli = ll_i2info(inode);
1207         struct ll_sb_info *sbi = ll_i2sbi(inode);
1208         ENTRY;
1209
1210         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1211                inode->i_generation, inode);
1212
1213         if (S_ISDIR(inode->i_mode)) {
1214                 /* these should have been cleared in ll_file_release */
1215                 LASSERT(lli->lli_opendir_key == NULL);
1216                 LASSERT(lli->lli_sai == NULL);
1217                 LASSERT(lli->lli_opendir_pid == 0);
1218         }
1219
1220         spin_lock(&lli->lli_lock);
1221         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1222         spin_unlock(&lli->lli_lock);
1223         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1224
1225         LASSERT(!lli->lli_open_fd_write_count);
1226         LASSERT(!lli->lli_open_fd_read_count);
1227         LASSERT(!lli->lli_open_fd_exec_count);
1228
1229         if (lli->lli_mds_write_och)
1230                 ll_md_real_close(inode, FMODE_WRITE);
1231         if (lli->lli_mds_exec_och)
1232                 ll_md_real_close(inode, FMODE_EXEC);
1233         if (lli->lli_mds_read_och)
1234                 ll_md_real_close(inode, FMODE_READ);
1235
1236         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1237                 OBD_FREE(lli->lli_symlink_name,
1238                          strlen(lli->lli_symlink_name) + 1);
1239                 lli->lli_symlink_name = NULL;
1240         }
1241
1242         ll_xattr_cache_destroy(inode);
1243
1244         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1245                 LASSERT(lli->lli_posix_acl == NULL);
1246                 if (lli->lli_remote_perms) {
1247                         free_rmtperm_hash(lli->lli_remote_perms);
1248                         lli->lli_remote_perms = NULL;
1249                 }
1250         }
1251 #ifdef CONFIG_FS_POSIX_ACL
1252         else if (lli->lli_posix_acl) {
1253                 LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1254                 LASSERT(lli->lli_remote_perms == NULL);
1255                 posix_acl_release(lli->lli_posix_acl);
1256                 lli->lli_posix_acl = NULL;
1257         }
1258 #endif
1259         lli->lli_inode_magic = LLI_INODE_DEAD;
1260
1261         ll_clear_inode_capas(inode);
1262         if (!S_ISDIR(inode->i_mode))
1263                 LASSERT(cfs_list_empty(&lli->lli_agl_list));
1264
1265         /*
1266          * XXX This has to be done before lsm is freed below, because
1267          * cl_object still uses inode lsm.
1268          */
1269         cl_inode_fini(inode);
1270         lli->lli_has_smd = false;
1271
1272         EXIT;
1273 }
1274
1275 int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1276                   struct md_open_data **mod)
1277 {
1278         struct lustre_md md;
1279         struct inode *inode = dentry->d_inode;
1280         struct ll_sb_info *sbi = ll_i2sbi(inode);
1281         struct ptlrpc_request *request = NULL;
1282         int rc, ia_valid;
1283         ENTRY;
1284
1285         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1286                                      LUSTRE_OPC_ANY, NULL);
1287         if (IS_ERR(op_data))
1288                 RETURN(PTR_ERR(op_data));
1289
1290         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1291                         &request, mod);
1292         if (rc) {
1293                 ptlrpc_req_finished(request);
1294                 if (rc == -ENOENT) {
1295                         clear_nlink(inode);
1296                         /* Unlinked special device node? Or just a race?
1297                          * Pretend we done everything. */
1298                         if (!S_ISREG(inode->i_mode) &&
1299                             !S_ISDIR(inode->i_mode)) {
1300                                 ia_valid = op_data->op_attr.ia_valid;
1301                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1302                                 rc = simple_setattr(dentry, &op_data->op_attr);
1303                                 op_data->op_attr.ia_valid = ia_valid;
1304                         }
1305                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1306                         CERROR("md_setattr fails: rc = %d\n", rc);
1307                 }
1308                 RETURN(rc);
1309         }
1310
1311         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1312                               sbi->ll_md_exp, &md);
1313         if (rc) {
1314                 ptlrpc_req_finished(request);
1315                 RETURN(rc);
1316         }
1317
1318         ia_valid = op_data->op_attr.ia_valid;
1319         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1320          * cache is not cleared yet. */
1321         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1322         rc = simple_setattr(dentry, &op_data->op_attr);
1323         op_data->op_attr.ia_valid = ia_valid;
1324
1325         /* Extract epoch data if obtained. */
1326         op_data->op_handle = md.body->handle;
1327         op_data->op_ioepoch = md.body->ioepoch;
1328
1329         ll_update_inode(inode, &md);
1330         ptlrpc_req_finished(request);
1331
1332         RETURN(rc);
1333 }
1334
1335 /* Close IO epoch and send Size-on-MDS attribute update. */
1336 static int ll_setattr_done_writing(struct inode *inode,
1337                                    struct md_op_data *op_data,
1338                                    struct md_open_data *mod)
1339 {
1340         struct ll_inode_info *lli = ll_i2info(inode);
1341         int rc = 0;
1342         ENTRY;
1343
1344         LASSERT(op_data != NULL);
1345         if (!S_ISREG(inode->i_mode))
1346                 RETURN(0);
1347
1348         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
1349                op_data->op_ioepoch, PFID(&lli->lli_fid));
1350
1351         op_data->op_flags = MF_EPOCH_CLOSE;
1352         ll_done_writing_attr(inode, op_data);
1353         ll_pack_inode2opdata(inode, op_data, NULL);
1354
1355         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1356         if (rc == -EAGAIN) {
1357                 /* MDS has instructed us to obtain Size-on-MDS attribute
1358                  * from OSTs and send setattr to back to MDS. */
1359                 rc = ll_som_update(inode, op_data);
1360         } else if (rc) {
1361                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1362                        inode->i_ino, rc);
1363         }
1364         RETURN(rc);
1365 }
1366
1367 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1368 {
1369         struct obd_capa *capa;
1370         int rc;
1371
1372         if (attr->ia_valid & ATTR_SIZE)
1373                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1374         else
1375                 capa = ll_mdscapa_get(inode);
1376
1377         rc = cl_setattr_ost(inode, attr, capa);
1378
1379         if (attr->ia_valid & ATTR_SIZE)
1380                 ll_truncate_free_capa(capa);
1381         else
1382                 capa_put(capa);
1383
1384         return rc;
1385 }
1386
1387 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1388  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1389  * keep these values until such a time that objects are allocated for it.
1390  * We do the MDS operations first, as it is checking permissions for us.
1391  * We don't to the MDS RPC if there is nothing that we want to store there,
1392  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1393  * going to do an RPC anyways.
1394  *
1395  * If we are doing a truncate, we will send the mtime and ctime updates
1396  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1397  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1398  * at the same time.
1399  *
1400  * In case of HSMimport, we only set attr on MDS.
1401  */
1402 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1403 {
1404         struct inode *inode = dentry->d_inode;
1405         struct ll_inode_info *lli = ll_i2info(inode);
1406         struct md_op_data *op_data = NULL;
1407         struct md_open_data *mod = NULL;
1408         bool file_is_released = false;
1409         int rc = 0, rc1 = 0;
1410         ENTRY;
1411
1412         CDEBUG(D_VFSTRACE, "%s: setattr inode %p/fid:"DFID" from %llu to %llu, "
1413                 "valid %x, hsm_import %d\n",
1414                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1415                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1416                 attr->ia_valid, hsm_import);
1417
1418         if (attr->ia_valid & ATTR_SIZE) {
1419                 /* Check new size against VFS/VM file size limit and rlimit */
1420                 rc = inode_newsize_ok(inode, attr->ia_size);
1421                 if (rc)
1422                         RETURN(rc);
1423
1424                 /* The maximum Lustre file size is variable, based on the
1425                  * OST maximum object size and number of stripes.  This
1426                  * needs another check in addition to the VFS check above. */
1427                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1428                         CDEBUG(D_INODE,"file "DFID" too large %llu > "LPU64"\n",
1429                                PFID(&lli->lli_fid), attr->ia_size,
1430                                ll_file_maxbytes(inode));
1431                         RETURN(-EFBIG);
1432                 }
1433
1434                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1435         }
1436
1437         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1438         if (attr->ia_valid & TIMES_SET_FLAGS) {
1439                 if (cfs_curproc_fsuid() != inode->i_uid &&
1440                     !cfs_capable(CFS_CAP_FOWNER))
1441                         RETURN(-EPERM);
1442         }
1443
1444         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1445         if (attr->ia_valid & ATTR_CTIME) {
1446                 attr->ia_ctime = CFS_CURRENT_TIME;
1447                 attr->ia_valid |= ATTR_CTIME_SET;
1448         }
1449         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1450             (attr->ia_valid & ATTR_ATIME)) {
1451                 attr->ia_atime = CFS_CURRENT_TIME;
1452                 attr->ia_valid |= ATTR_ATIME_SET;
1453         }
1454         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1455             (attr->ia_valid & ATTR_MTIME)) {
1456                 attr->ia_mtime = CFS_CURRENT_TIME;
1457                 attr->ia_valid |= ATTR_MTIME_SET;
1458         }
1459
1460         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1461                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1462                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1463                        cfs_time_current_sec());
1464
1465         /* If we are changing file size, file content is modified, flag it. */
1466         if (attr->ia_valid & ATTR_SIZE) {
1467                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1468                 spin_lock(&lli->lli_lock);
1469                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1470                 spin_unlock(&lli->lli_lock);
1471         }
1472
1473         /* We always do an MDS RPC, even if we're only changing the size;
1474          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1475
1476         OBD_ALLOC_PTR(op_data);
1477         if (op_data == NULL)
1478                 RETURN(-ENOMEM);
1479
1480         if (!S_ISDIR(inode->i_mode)) {
1481                 if (attr->ia_valid & ATTR_SIZE)
1482                         inode_dio_write_done(inode);
1483                 mutex_unlock(&inode->i_mutex);
1484                 down_write(&lli->lli_trunc_sem);
1485         }
1486
1487         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1488
1489         /* Open epoch for truncate. */
1490         if (exp_connect_som(ll_i2mdexp(inode)) &&
1491             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1492                 op_data->op_flags = MF_EPOCH_OPEN;
1493
1494         /* truncate on a released file must failed with -ENODATA,
1495          * so size must not be set on MDS for released file
1496          * but other attributes must be set
1497          */
1498         if (S_ISREG(inode->i_mode)) {
1499                 struct lov_stripe_md *lsm;
1500                 __u32 gen;
1501
1502                 ll_layout_refresh(inode, &gen);
1503                 lsm = ccc_inode_lsm_get(inode);
1504                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1505                         file_is_released = true;
1506                 ccc_inode_lsm_put(inode, lsm);
1507         }
1508
1509         /* if not in HSM import mode, clear size attr for released file
1510          * we clear the attribute send to MDT in op_data, not the original
1511          * received from caller in attr which is used later to
1512          * decide return code */
1513         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1514                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1515
1516         rc = ll_md_setattr(dentry, op_data, &mod);
1517         if (rc)
1518                 GOTO(out, rc);
1519
1520         /* truncate failed (only when non HSM import), others succeed */
1521         if (file_is_released) {
1522                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1523                         GOTO(out, rc = -ENODATA);
1524                 else
1525                         GOTO(out, rc = 0);
1526         }
1527
1528         /* RPC to MDT is sent, cancel data modification flag */
1529         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1530                 spin_lock(&lli->lli_lock);
1531                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1532                 spin_unlock(&lli->lli_lock);
1533         }
1534
1535         ll_ioepoch_open(lli, op_data->op_ioepoch);
1536         if (!S_ISREG(inode->i_mode))
1537                 GOTO(out, rc = 0);
1538
1539         if (attr->ia_valid & (ATTR_SIZE |
1540                               ATTR_ATIME | ATTR_ATIME_SET |
1541                               ATTR_MTIME | ATTR_MTIME_SET)) {
1542                 /* For truncate and utimes sending attributes to OSTs, setting
1543                  * mtime/atime to the past will be performed under PW [0:EOF]
1544                  * extent lock (new_size:EOF for truncate).  It may seem
1545                  * excessive to send mtime/atime updates to OSTs when not
1546                  * setting times to past, but it is necessary due to possible
1547                  * time de-synchronization between MDT inode and OST objects */
1548                 rc = ll_setattr_ost(inode, attr);
1549         }
1550         EXIT;
1551 out:
1552         if (op_data) {
1553                 if (op_data->op_ioepoch) {
1554                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1555                         if (!rc)
1556                                 rc = rc1;
1557                 }
1558                 ll_finish_md_op_data(op_data);
1559         }
1560         if (!S_ISDIR(inode->i_mode)) {
1561                 up_write(&lli->lli_trunc_sem);
1562                 mutex_lock(&inode->i_mutex);
1563                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1564                         inode_dio_wait(inode);
1565         }
1566
1567         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1568                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1569
1570         return rc;
1571 }
1572
1573 int ll_setattr(struct dentry *de, struct iattr *attr)
1574 {
1575         int mode = de->d_inode->i_mode;
1576
1577         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1578                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1579                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1580
1581         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1582                                (ATTR_SIZE|ATTR_MODE)) &&
1583             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1584              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1585               !(attr->ia_mode & S_ISGID))))
1586                 attr->ia_valid |= ATTR_FORCE;
1587
1588         if ((mode & S_ISUID) &&
1589             !(attr->ia_mode & S_ISUID) &&
1590             !(attr->ia_valid & ATTR_KILL_SUID))
1591                 attr->ia_valid |= ATTR_KILL_SUID;
1592
1593         if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1594             !(attr->ia_mode & S_ISGID) &&
1595             !(attr->ia_valid & ATTR_KILL_SGID))
1596                 attr->ia_valid |= ATTR_KILL_SGID;
1597
1598         return ll_setattr_raw(de, attr, false);
1599 }
1600
1601 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1602                        __u64 max_age, __u32 flags)
1603 {
1604         struct ll_sb_info *sbi = ll_s2sbi(sb);
1605         struct obd_statfs obd_osfs;
1606         int rc;
1607         ENTRY;
1608
1609         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1610         if (rc) {
1611                 CERROR("md_statfs fails: rc = %d\n", rc);
1612                 RETURN(rc);
1613         }
1614
1615         osfs->os_type = sb->s_magic;
1616
1617         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1618                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
1619
1620         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1621                 flags |= OBD_STATFS_NODELAY;
1622
1623         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1624         if (rc) {
1625                 CERROR("obd_statfs fails: rc = %d\n", rc);
1626                 RETURN(rc);
1627         }
1628
1629         CDEBUG(D_SUPER, "OSC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
1630                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1631                obd_osfs.os_files);
1632
1633         osfs->os_bsize = obd_osfs.os_bsize;
1634         osfs->os_blocks = obd_osfs.os_blocks;
1635         osfs->os_bfree = obd_osfs.os_bfree;
1636         osfs->os_bavail = obd_osfs.os_bavail;
1637
1638         /* If we don't have as many objects free on the OST as inodes
1639          * on the MDS, we reduce the total number of inodes to
1640          * compensate, so that the "inodes in use" number is correct.
1641          */
1642         if (obd_osfs.os_ffree < osfs->os_ffree) {
1643                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1644                         obd_osfs.os_ffree;
1645                 osfs->os_ffree = obd_osfs.os_ffree;
1646         }
1647
1648         RETURN(rc);
1649 }
1650 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1651 {
1652         struct super_block *sb = de->d_sb;
1653         struct obd_statfs osfs;
1654         int rc;
1655
1656         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
1657         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1658
1659         /* Some amount of caching on the client is allowed */
1660         rc = ll_statfs_internal(sb, &osfs,
1661                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1662                                 0);
1663         if (rc)
1664                 return rc;
1665
1666         statfs_unpack(sfs, &osfs);
1667
1668         /* We need to downshift for all 32-bit kernels, because we can't
1669          * tell if the kernel is being called via sys_statfs64() or not.
1670          * Stop before overflowing f_bsize - in which case it is better
1671          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1672         if (sizeof(long) < 8) {
1673                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1674                         sfs->f_bsize <<= 1;
1675
1676                         osfs.os_blocks >>= 1;
1677                         osfs.os_bfree >>= 1;
1678                         osfs.os_bavail >>= 1;
1679                 }
1680         }
1681
1682         sfs->f_blocks = osfs.os_blocks;
1683         sfs->f_bfree = osfs.os_bfree;
1684         sfs->f_bavail = osfs.os_bavail;
1685         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1686         return 0;
1687 }
1688
1689 void ll_inode_size_lock(struct inode *inode)
1690 {
1691         struct ll_inode_info *lli;
1692
1693         LASSERT(!S_ISDIR(inode->i_mode));
1694
1695         lli = ll_i2info(inode);
1696         LASSERT(lli->lli_size_sem_owner != current);
1697         down(&lli->lli_size_sem);
1698         LASSERT(lli->lli_size_sem_owner == NULL);
1699         lli->lli_size_sem_owner = current;
1700 }
1701
1702 void ll_inode_size_unlock(struct inode *inode)
1703 {
1704         struct ll_inode_info *lli;
1705
1706         lli = ll_i2info(inode);
1707         LASSERT(lli->lli_size_sem_owner == current);
1708         lli->lli_size_sem_owner = NULL;
1709         up(&lli->lli_size_sem);
1710 }
1711
1712 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1713 {
1714         struct ll_inode_info *lli = ll_i2info(inode);
1715         struct mdt_body *body = md->body;
1716         struct lov_stripe_md *lsm = md->lsm;
1717         struct ll_sb_info *sbi = ll_i2sbi(inode);
1718
1719         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1720         if (lsm != NULL) {
1721                 if (!lli->lli_has_smd &&
1722                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1723                         cl_file_inode_init(inode, md);
1724
1725                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1726                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1727                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1728         }
1729
1730         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1731                 if (body->valid & OBD_MD_FLRMTPERM)
1732                         ll_update_remote_perm(inode, md->remote_perm);
1733         }
1734 #ifdef CONFIG_FS_POSIX_ACL
1735         else if (body->valid & OBD_MD_FLACL) {
1736                 spin_lock(&lli->lli_lock);
1737                 if (lli->lli_posix_acl)
1738                         posix_acl_release(lli->lli_posix_acl);
1739                 lli->lli_posix_acl = md->posix_acl;
1740                 spin_unlock(&lli->lli_lock);
1741         }
1742 #endif
1743         inode->i_ino = cl_fid_build_ino(&body->fid1,
1744                                         sbi->ll_flags & LL_SBI_32BIT_API);
1745         inode->i_generation = cl_fid_build_gen(&body->fid1);
1746
1747         if (body->valid & OBD_MD_FLATIME) {
1748                 if (body->atime > LTIME_S(inode->i_atime))
1749                         LTIME_S(inode->i_atime) = body->atime;
1750                 lli->lli_lvb.lvb_atime = body->atime;
1751         }
1752         if (body->valid & OBD_MD_FLMTIME) {
1753                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1754                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
1755                                "to "LPU64"\n", inode->i_ino,
1756                                LTIME_S(inode->i_mtime), body->mtime);
1757                         LTIME_S(inode->i_mtime) = body->mtime;
1758                 }
1759                 lli->lli_lvb.lvb_mtime = body->mtime;
1760         }
1761         if (body->valid & OBD_MD_FLCTIME) {
1762                 if (body->ctime > LTIME_S(inode->i_ctime))
1763                         LTIME_S(inode->i_ctime) = body->ctime;
1764                 lli->lli_lvb.lvb_ctime = body->ctime;
1765         }
1766         if (body->valid & OBD_MD_FLMODE)
1767                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1768         if (body->valid & OBD_MD_FLTYPE)
1769                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1770         LASSERT(inode->i_mode != 0);
1771         if (S_ISREG(inode->i_mode)) {
1772                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1, LL_MAX_BLKSIZE_BITS);
1773         } else {
1774                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1775         }
1776         if (body->valid & OBD_MD_FLUID)
1777                 inode->i_uid = body->uid;
1778         if (body->valid & OBD_MD_FLGID)
1779                 inode->i_gid = body->gid;
1780         if (body->valid & OBD_MD_FLFLAGS)
1781                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1782         if (body->valid & OBD_MD_FLNLINK)
1783                 set_nlink(inode, body->nlink);
1784         if (body->valid & OBD_MD_FLRDEV)
1785                 inode->i_rdev = old_decode_dev(body->rdev);
1786
1787         if (body->valid & OBD_MD_FLID) {
1788                 /* FID shouldn't be changed! */
1789                 if (fid_is_sane(&lli->lli_fid)) {
1790                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1791                                  "Trying to change FID "DFID
1792                                  " to the "DFID", inode %lu/%u(%p)\n",
1793                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1794                                  inode->i_ino, inode->i_generation, inode);
1795                 } else
1796                         lli->lli_fid = body->fid1;
1797         }
1798
1799         LASSERT(fid_seq(&lli->lli_fid) != 0);
1800
1801         if (body->valid & OBD_MD_FLSIZE) {
1802                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1803                     S_ISREG(inode->i_mode)) {
1804                         struct lustre_handle lockh;
1805                         ldlm_mode_t mode;
1806
1807                         /* As it is possible a blocking ast has been processed
1808                          * by this time, we need to check there is an UPDATE
1809                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1810                          * it. */
1811                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1812                                                &lockh, LDLM_FL_CBPENDING,
1813                                                LCK_CR | LCK_CW |
1814                                                LCK_PR | LCK_PW);
1815                         if (mode) {
1816                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1817                                                       LLIF_EPOCH_PENDING |
1818                                                       LLIF_SOM_DIRTY)) {
1819                                         CERROR("ino %lu flags %u still has "
1820                                                "size authority! do not trust "
1821                                                "the size got from MDS\n",
1822                                                inode->i_ino, lli->lli_flags);
1823                                 } else {
1824                                         /* Use old size assignment to avoid
1825                                          * deadlock bz14138 & bz14326 */
1826                                         i_size_write(inode, body->size);
1827                                         spin_lock(&lli->lli_lock);
1828                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1829                                         spin_unlock(&lli->lli_lock);
1830                                 }
1831                                 ldlm_lock_decref(&lockh, mode);
1832                         }
1833                 } else {
1834                         /* Use old size assignment to avoid
1835                          * deadlock bz14138 & bz14326 */
1836                         i_size_write(inode, body->size);
1837
1838                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1839                                inode->i_ino, (unsigned long long)body->size);
1840                 }
1841
1842                 if (body->valid & OBD_MD_FLBLOCKS)
1843                         inode->i_blocks = body->blocks;
1844         }
1845
1846         if (body->valid & OBD_MD_FLMDSCAPA) {
1847                 LASSERT(md->mds_capa);
1848                 ll_add_capa(inode, md->mds_capa);
1849         }
1850         if (body->valid & OBD_MD_FLOSSCAPA) {
1851                 LASSERT(md->oss_capa);
1852                 ll_add_capa(inode, md->oss_capa);
1853         }
1854
1855         if (body->valid & OBD_MD_TSTATE) {
1856                 if (body->t_state & MS_RESTORE)
1857                         lli->lli_flags |= LLIF_FILE_RESTORING;
1858         }
1859 }
1860
1861 void ll_read_inode2(struct inode *inode, void *opaque)
1862 {
1863         struct lustre_md *md = opaque;
1864         struct ll_inode_info *lli = ll_i2info(inode);
1865         ENTRY;
1866
1867         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1868                PFID(&lli->lli_fid), inode);
1869
1870         LASSERT(!lli->lli_has_smd);
1871
1872         /* Core attributes from the MDS first.  This is a new inode, and
1873          * the VFS doesn't zero times in the core inode so we have to do
1874          * it ourselves.  They will be overwritten by either MDS or OST
1875          * attributes - we just need to make sure they aren't newer. */
1876         LTIME_S(inode->i_mtime) = 0;
1877         LTIME_S(inode->i_atime) = 0;
1878         LTIME_S(inode->i_ctime) = 0;
1879         inode->i_rdev = 0;
1880         ll_update_inode(inode, md);
1881
1882         /* OIDEBUG(inode); */
1883
1884         /* initializing backing dev info. */
1885         inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
1886
1887
1888         if (S_ISREG(inode->i_mode)) {
1889                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1890                 inode->i_op = &ll_file_inode_operations;
1891                 inode->i_fop = sbi->ll_fop;
1892                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1893                 EXIT;
1894         } else if (S_ISDIR(inode->i_mode)) {
1895                 inode->i_op = &ll_dir_inode_operations;
1896                 inode->i_fop = &ll_dir_operations;
1897                 EXIT;
1898         } else if (S_ISLNK(inode->i_mode)) {
1899                 inode->i_op = &ll_fast_symlink_inode_operations;
1900                 EXIT;
1901         } else {
1902                 inode->i_op = &ll_special_inode_operations;
1903
1904                 init_special_inode(inode, inode->i_mode,
1905                                    inode->i_rdev);
1906
1907                 EXIT;
1908         }
1909 }
1910
1911 void ll_delete_inode(struct inode *inode)
1912 {
1913         struct cl_inode_info *lli = cl_i2info(inode);
1914         ENTRY;
1915
1916         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1917                 /* discard all dirty pages before truncating them, required by
1918                  * osc_extent implementation at LU-1030. */
1919                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1920                                    CL_FSYNC_DISCARD, 1);
1921
1922         truncate_inode_pages(&inode->i_data, 0);
1923
1924         /* Workaround for LU-118 */
1925         if (inode->i_data.nrpages) {
1926                 TREE_READ_LOCK_IRQ(&inode->i_data);
1927                 TREE_READ_UNLOCK_IRQ(&inode->i_data);
1928                 LASSERTF(inode->i_data.nrpages == 0,
1929                          "inode=%lu/%u(%p) nrpages=%lu, see "
1930                          "http://jira.whamcloud.com/browse/LU-118\n",
1931                          inode->i_ino, inode->i_generation, inode,
1932                          inode->i_data.nrpages);
1933         }
1934         /* Workaround end */
1935
1936 #ifdef HAVE_SBOPS_EVICT_INODE
1937         ll_clear_inode(inode);
1938 #endif
1939         clear_inode(inode);
1940
1941         EXIT;
1942 }
1943
1944 int ll_iocontrol(struct inode *inode, struct file *file,
1945                  unsigned int cmd, unsigned long arg)
1946 {
1947         struct ll_sb_info *sbi = ll_i2sbi(inode);
1948         struct ptlrpc_request *req = NULL;
1949         int rc, flags = 0;
1950         ENTRY;
1951
1952         switch(cmd) {
1953         case FSFILT_IOC_GETFLAGS: {
1954                 struct mdt_body *body;
1955                 struct md_op_data *op_data;
1956
1957                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1958                                              0, 0, LUSTRE_OPC_ANY,
1959                                              NULL);
1960                 if (IS_ERR(op_data))
1961                         RETURN(PTR_ERR(op_data));
1962
1963                 op_data->op_valid = OBD_MD_FLFLAGS;
1964                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1965                 ll_finish_md_op_data(op_data);
1966                 if (rc) {
1967                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1968                         RETURN(-abs(rc));
1969                 }
1970
1971                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1972
1973                 flags = body->flags;
1974
1975                 ptlrpc_req_finished(req);
1976
1977                 RETURN(put_user(flags, (int *)arg));
1978         }
1979         case FSFILT_IOC_SETFLAGS: {
1980                 struct lov_stripe_md *lsm;
1981                 struct obd_info oinfo = { { { 0 } } };
1982                 struct md_op_data *op_data;
1983
1984                 if (get_user(flags, (int *)arg))
1985                         RETURN(-EFAULT);
1986
1987                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1988                                              LUSTRE_OPC_ANY, NULL);
1989                 if (IS_ERR(op_data))
1990                         RETURN(PTR_ERR(op_data));
1991
1992                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1993                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1994                 rc = md_setattr(sbi->ll_md_exp, op_data,
1995                                 NULL, 0, NULL, 0, &req, NULL);
1996                 ll_finish_md_op_data(op_data);
1997                 ptlrpc_req_finished(req);
1998                 if (rc)
1999                         RETURN(rc);
2000
2001                 inode->i_flags = ll_ext_to_inode_flags(flags);
2002
2003                 lsm = ccc_inode_lsm_get(inode);
2004                 if (!lsm_has_objects(lsm)) {
2005                         ccc_inode_lsm_put(inode, lsm);
2006                         RETURN(0);
2007                 }
2008
2009                 OBDO_ALLOC(oinfo.oi_oa);
2010                 if (!oinfo.oi_oa) {
2011                         ccc_inode_lsm_put(inode, lsm);
2012                         RETURN(-ENOMEM);
2013                 }
2014                 oinfo.oi_md = lsm;
2015                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
2016                 oinfo.oi_oa->o_flags = flags;
2017                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
2018                                        OBD_MD_FLGROUP;
2019                 oinfo.oi_capa = ll_mdscapa_get(inode);
2020                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
2021                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
2022                 capa_put(oinfo.oi_capa);
2023                 OBDO_FREE(oinfo.oi_oa);
2024                 ccc_inode_lsm_put(inode, lsm);
2025
2026                 if (rc && rc != -EPERM && rc != -EACCES)
2027                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
2028
2029                 RETURN(rc);
2030         }
2031         default:
2032                 RETURN(-ENOSYS);
2033         }
2034
2035         RETURN(0);
2036 }
2037
2038 int ll_flush_ctx(struct inode *inode)
2039 {
2040         struct ll_sb_info  *sbi = ll_i2sbi(inode);
2041
2042         CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
2043
2044         obd_set_info_async(NULL, sbi->ll_md_exp,
2045                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2046                            0, NULL, NULL);
2047         obd_set_info_async(NULL, sbi->ll_dt_exp,
2048                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
2049                            0, NULL, NULL);
2050         return 0;
2051 }
2052
2053 /* umount -f client means force down, don't save state */
2054 void ll_umount_begin(struct super_block *sb)
2055 {
2056         struct ll_sb_info *sbi = ll_s2sbi(sb);
2057         struct obd_device *obd;
2058         struct obd_ioctl_data *ioc_data;
2059         ENTRY;
2060
2061         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
2062                sb->s_count, atomic_read(&sb->s_active));
2063
2064         obd = class_exp2obd(sbi->ll_md_exp);
2065         if (obd == NULL) {
2066                 CERROR("Invalid MDC connection handle "LPX64"\n",
2067                        sbi->ll_md_exp->exp_handle.h_cookie);
2068                 EXIT;
2069                 return;
2070         }
2071         obd->obd_force = 1;
2072
2073         obd = class_exp2obd(sbi->ll_dt_exp);
2074         if (obd == NULL) {
2075                 CERROR("Invalid LOV connection handle "LPX64"\n",
2076                        sbi->ll_dt_exp->exp_handle.h_cookie);
2077                 EXIT;
2078                 return;
2079         }
2080         obd->obd_force = 1;
2081
2082         OBD_ALLOC_PTR(ioc_data);
2083         if (ioc_data) {
2084                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
2085                               sizeof *ioc_data, ioc_data, NULL);
2086
2087                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
2088                               sizeof *ioc_data, ioc_data, NULL);
2089
2090                 OBD_FREE_PTR(ioc_data);
2091         }
2092
2093         /* Really, we'd like to wait until there are no requests outstanding,
2094          * and then continue.  For now, we just invalidate the requests,
2095          * schedule() and sleep one second if needed, and hope.
2096          */
2097         cfs_schedule();
2098         EXIT;
2099 }
2100
2101 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
2102 {
2103         struct ll_sb_info *sbi = ll_s2sbi(sb);
2104         char *profilenm = get_profile_name(sb);
2105         int err;
2106         __u32 read_only;
2107
2108         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
2109                 read_only = *flags & MS_RDONLY;
2110                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
2111                                          sizeof(KEY_READ_ONLY),
2112                                          KEY_READ_ONLY, sizeof(read_only),
2113                                          &read_only, NULL);
2114                 if (err) {
2115                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
2116                                       profilenm, read_only ?
2117                                       "read-only" : "read-write", err);
2118                         return err;
2119                 }
2120
2121                 if (read_only)
2122                         sb->s_flags |= MS_RDONLY;
2123                 else
2124                         sb->s_flags &= ~MS_RDONLY;
2125
2126                 if (sbi->ll_flags & LL_SBI_VERBOSE)
2127                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
2128                                       read_only ?  "read-only" : "read-write");
2129         }
2130         return 0;
2131 }
2132
2133 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2134                   struct super_block *sb, struct lookup_intent *it)
2135 {
2136         struct ll_sb_info *sbi = NULL;
2137         struct lustre_md md;
2138         int rc;
2139         ENTRY;
2140
2141         LASSERT(*inode || sb);
2142         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2143         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2144                               sbi->ll_md_exp, &md);
2145         if (rc)
2146                 RETURN(rc);
2147
2148         if (*inode) {
2149                 ll_update_inode(*inode, &md);
2150         } else {
2151                 LASSERT(sb != NULL);
2152
2153                 /*
2154                  * At this point server returns to client's same fid as client
2155                  * generated for creating. So using ->fid1 is okay here.
2156                  */
2157                 LASSERT(fid_is_sane(&md.body->fid1));
2158
2159                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2160                                              sbi->ll_flags & LL_SBI_32BIT_API),
2161                                  &md);
2162                 if (*inode == NULL || IS_ERR(*inode)) {
2163 #ifdef CONFIG_FS_POSIX_ACL
2164                         if (md.posix_acl) {
2165                                 posix_acl_release(md.posix_acl);
2166                                 md.posix_acl = NULL;
2167                         }
2168 #endif
2169                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2170                         *inode = NULL;
2171                         CERROR("new_inode -fatal: rc %d\n", rc);
2172                         GOTO(out, rc);
2173                 }
2174         }
2175
2176         /* Handling piggyback layout lock.
2177          * Layout lock can be piggybacked by getattr and open request.
2178          * The lsm can be applied to inode only if it comes with a layout lock
2179          * otherwise correct layout may be overwritten, for example:
2180          * 1. proc1: mdt returns a lsm but not granting layout
2181          * 2. layout was changed by another client
2182          * 3. proc2: refresh layout and layout lock granted
2183          * 4. proc1: to apply a stale layout */
2184         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2185                 struct lustre_handle lockh;
2186                 struct ldlm_lock *lock;
2187
2188                 lockh.cookie = it->d.lustre.it_lock_handle;
2189                 lock = ldlm_handle2lock(&lockh);
2190                 LASSERT(lock != NULL);
2191                 if (ldlm_has_layout(lock)) {
2192                         struct cl_object_conf conf;
2193
2194                         memset(&conf, 0, sizeof(conf));
2195                         conf.coc_opc = OBJECT_CONF_SET;
2196                         conf.coc_inode = *inode;
2197                         conf.coc_lock = lock;
2198                         conf.u.coc_md = &md;
2199                         (void)ll_layout_conf(*inode, &conf);
2200                 }
2201                 LDLM_LOCK_PUT(lock);
2202         }
2203
2204 out:
2205         if (md.lsm != NULL)
2206                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2207         md_free_lustre_md(sbi->ll_md_exp, &md);
2208         RETURN(rc);
2209 }
2210
2211 int ll_obd_statfs(struct inode *inode, void *arg)
2212 {
2213         struct ll_sb_info *sbi = NULL;
2214         struct obd_export *exp;
2215         char *buf = NULL;
2216         struct obd_ioctl_data *data = NULL;
2217         __u32 type;
2218         __u32 flags;
2219         int len = 0, rc;
2220
2221         if (!inode || !(sbi = ll_i2sbi(inode)))
2222                 GOTO(out_statfs, rc = -EINVAL);
2223
2224         rc = obd_ioctl_getdata(&buf, &len, arg);
2225         if (rc)
2226                 GOTO(out_statfs, rc);
2227
2228         data = (void*)buf;
2229         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2230             !data->ioc_pbuf1 || !data->ioc_pbuf2)
2231                 GOTO(out_statfs, rc = -EINVAL);
2232
2233         if (data->ioc_inllen1 != sizeof(__u32) ||
2234             data->ioc_inllen2 != sizeof(__u32) ||
2235             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2236             data->ioc_plen2 != sizeof(struct obd_uuid))
2237                 GOTO(out_statfs, rc = -EINVAL);
2238
2239         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2240         if (type & LL_STATFS_LMV)
2241                 exp = sbi->ll_md_exp;
2242         else if (type & LL_STATFS_LOV)
2243                 exp = sbi->ll_dt_exp;
2244         else
2245                 GOTO(out_statfs, rc = -ENODEV);
2246
2247         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2248         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2249         if (rc)
2250                 GOTO(out_statfs, rc);
2251 out_statfs:
2252         if (buf)
2253                 obd_ioctl_freedata(buf, len);
2254         return rc;
2255 }
2256
2257 int ll_process_config(struct lustre_cfg *lcfg)
2258 {
2259         char *ptr;
2260         void *sb;
2261         struct lprocfs_static_vars lvars;
2262         unsigned long x;
2263         int rc = 0;
2264
2265         lprocfs_llite_init_vars(&lvars);
2266
2267         /* The instance name contains the sb: lustre-client-aacfe000 */
2268         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2269         if (!ptr || !*(++ptr))
2270                 return -EINVAL;
2271         if (sscanf(ptr, "%lx", &x) != 1)
2272                 return -EINVAL;
2273         sb = (void *)x;
2274         /* This better be a real Lustre superblock! */
2275         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2276
2277         /* Note we have not called client_common_fill_super yet, so
2278            proc fns must be able to handle that! */
2279         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2280                                       lcfg, sb);
2281         if (rc > 0)
2282                 rc = 0;
2283         return(rc);
2284 }
2285
2286 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2287 struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
2288                                        struct inode *i1, struct inode *i2,
2289                                        const char *name, int namelen,
2290                                        int mode, __u32 opc, void *data)
2291 {
2292         LASSERT(i1 != NULL);
2293
2294         if (namelen > ll_i2sbi(i1)->ll_namelen)
2295                 return ERR_PTR(-ENAMETOOLONG);
2296
2297         if (op_data == NULL)
2298                 OBD_ALLOC_PTR(op_data);
2299
2300         if (op_data == NULL)
2301                 return ERR_PTR(-ENOMEM);
2302
2303         ll_i2gids(op_data->op_suppgids, i1, i2);
2304         op_data->op_fid1 = *ll_inode2fid(i1);
2305         op_data->op_capa1 = ll_mdscapa_get(i1);
2306
2307         if (i2) {
2308                 op_data->op_fid2 = *ll_inode2fid(i2);
2309                 op_data->op_capa2 = ll_mdscapa_get(i2);
2310         } else {
2311                 fid_zero(&op_data->op_fid2);
2312                 op_data->op_capa2 = NULL;
2313         }
2314
2315         op_data->op_name = name;
2316         op_data->op_namelen = namelen;
2317         op_data->op_mode = mode;
2318         op_data->op_mod_time = cfs_time_current_sec();
2319         op_data->op_fsuid = cfs_curproc_fsuid();
2320         op_data->op_fsgid = cfs_curproc_fsgid();
2321         op_data->op_cap = cfs_curproc_cap_pack();
2322         op_data->op_bias = 0;
2323         op_data->op_cli_flags = 0;
2324         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2325              filename_is_volatile(name, namelen, NULL))
2326                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2327         op_data->op_opc = opc;
2328         op_data->op_mds = 0;
2329         op_data->op_data = data;
2330
2331         /* If the file is being opened after mknod() (normally due to NFS)
2332          * try to use the default stripe data from parent directory for
2333          * allocating OST objects.  Try to pass the parent FID to MDS. */
2334         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2335             !ll_i2info(i2)->lli_has_smd) {
2336                 struct ll_inode_info *lli = ll_i2info(i2);
2337
2338                 spin_lock(&lli->lli_lock);
2339                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2340                         op_data->op_fid1 = lli->lli_pfid;
2341                 spin_unlock(&lli->lli_lock);
2342                 /** We ignore parent's capability temporary. */
2343         }
2344
2345         /* When called by ll_setattr_raw, file is i1. */
2346         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2347                 op_data->op_bias |= MDS_DATA_MODIFIED;
2348
2349         return op_data;
2350 }
2351
2352 void ll_finish_md_op_data(struct md_op_data *op_data)
2353 {
2354         capa_put(op_data->op_capa1);
2355         capa_put(op_data->op_capa2);
2356         OBD_FREE_PTR(op_data);
2357 }
2358
2359 #ifdef HAVE_SUPEROPS_USE_DENTRY
2360 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2361 #else
2362 int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
2363 #endif
2364 {
2365         struct ll_sb_info *sbi;
2366
2367 #ifdef HAVE_SUPEROPS_USE_DENTRY
2368         LASSERT((seq != NULL) && (dentry != NULL));
2369         sbi = ll_s2sbi(dentry->d_sb);
2370 #else
2371         LASSERT((seq != NULL) && (vfs != NULL));
2372         sbi = ll_s2sbi(vfs->mnt_sb);
2373 #endif
2374
2375         if (sbi->ll_flags & LL_SBI_NOLCK)
2376                 seq_puts(seq, ",nolock");
2377
2378         if (sbi->ll_flags & LL_SBI_FLOCK)
2379                 seq_puts(seq, ",flock");
2380
2381         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2382                 seq_puts(seq, ",localflock");
2383
2384         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2385                 seq_puts(seq, ",user_xattr");
2386
2387         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2388                 seq_puts(seq, ",lazystatfs");
2389
2390         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2391                 seq_puts(seq, ",user_fid2path");
2392
2393         RETURN(0);
2394 }
2395
2396 /**
2397  * Get obd name by cmd, and copy out to user space
2398  */
2399 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2400 {
2401         struct ll_sb_info *sbi = ll_i2sbi(inode);
2402         struct obd_device *obd;
2403         ENTRY;
2404
2405         if (cmd == OBD_IOC_GETDTNAME)
2406                 obd = class_exp2obd(sbi->ll_dt_exp);
2407         else if (cmd == OBD_IOC_GETMDNAME)
2408                 obd = class_exp2obd(sbi->ll_md_exp);
2409         else
2410                 RETURN(-EINVAL);
2411
2412         if (!obd)
2413                 RETURN(-ENOENT);
2414
2415         if (copy_to_user((void *)arg, obd->obd_name,
2416                          strlen(obd->obd_name) + 1))
2417                 RETURN(-EFAULT);
2418
2419         RETURN(0);
2420 }
2421
2422 /**
2423  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2424  * fsname will be returned in this buffer; otherwise, a static buffer will be
2425  * used to store the fsname and returned to caller.
2426  */
2427 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2428 {
2429         static char fsname_static[MTI_NAME_MAXLEN];
2430         struct lustre_sb_info *lsi = s2lsi(sb);
2431         char *ptr;
2432         int len;
2433
2434         if (buf == NULL) {
2435                 /* this means the caller wants to use static buffer
2436                  * and it doesn't care about race. Usually this is
2437                  * in error reporting path */
2438                 buf = fsname_static;
2439                 buflen = sizeof(fsname_static);
2440         }
2441
2442         len = strlen(lsi->lsi_lmd->lmd_profile);
2443         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2444         if (ptr && (strcmp(ptr, "-client") == 0))
2445                 len -= 7;
2446
2447         if (unlikely(len >= buflen))
2448                 len = buflen - 1;
2449         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2450         buf[len] = '\0';
2451
2452         return buf;
2453 }
2454
2455 static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
2456 {
2457         char *path = NULL;
2458
2459 #ifdef HAVE_FS_STRUCT_USE_PATH
2460         struct path p;
2461
2462         p.dentry = dentry;
2463         p.mnt = current->fs->root.mnt;
2464         path_get(&p);
2465         path = d_path(&p, buf, bufsize);
2466         path_put(&p);
2467 #else
2468         path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
2469 #endif
2470
2471         return path;
2472 }
2473
2474 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2475 {
2476         char *buf, *path = NULL;
2477         struct dentry *dentry = NULL;
2478         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2479
2480         /* this can be called inside spin lock so use GFP_ATOMIC. */
2481         buf = (char *)__get_free_page(GFP_ATOMIC);
2482         if (buf != NULL) {
2483                 dentry = d_find_alias(page->mapping->host);
2484                 if (dentry != NULL)
2485                         path = ll_d_path(dentry, buf, PAGE_SIZE);
2486         }
2487
2488         CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
2489               "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2490               s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2491               PFID(&obj->cob_header.coh_lu.loh_fid),
2492               (path && !IS_ERR(path)) ? path : "", ioret);
2493
2494         if (dentry != NULL)
2495                 dput(dentry);
2496
2497         if (buf != NULL)
2498                 free_page((unsigned long)buf);
2499 }