kernel/drivers/staging/lustre/lustre/llite/llite_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/llite/llite_lib.c
  37  *
  38  * Lustre Light Super operations
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LLITE
  42
  43 #include <linux/module.h>
  44 #include <linux/statfs.h>
  45 #include <linux/types.h>
  46 #include <linux/mm.h>
  47
  48 #include "../include/lustre_lite.h"
  49 #include "../include/lustre_ha.h"
  50 #include "../include/lustre_dlm.h"
  51 #include "../include/lprocfs_status.h"
  52 #include "../include/lustre_disk.h"
  53 #include "../include/lustre_param.h"
  54 #include "../include/lustre_log.h"
  55 #include "../include/cl_object.h"
  56 #include "../include/obd_cksum.h"
  57 #include "llite_internal.h"
  58
  59 struct kmem_cache *ll_file_data_slab;
  60 struct proc_dir_entry *proc_lustre_fs_root;
  61
  62 static LIST_HEAD(ll_super_blocks);
  63 static DEFINE_SPINLOCK(ll_sb_lock);
  64
  65 #ifndef log2
  66 #define log2(n) ffz(~(n))
  67 #endif
  68
  69 static struct ll_sb_info *ll_init_sbi(void)
  70 {
  71         struct ll_sb_info *sbi = NULL;
  72         unsigned long pages;
  73         unsigned long lru_page_max;
  74         struct sysinfo si;
  75         class_uuid_t uuid;
  76         int i;
  77
  78         sbi = kzalloc(sizeof(*sbi), GFP_NOFS);
  79         if (!sbi)
  80                 return NULL;
  81
  82         spin_lock_init(&sbi->ll_lock);
  83         mutex_init(&sbi->ll_lco.lco_lock);
  84         spin_lock_init(&sbi->ll_pp_extent_lock);
  85         spin_lock_init(&sbi->ll_process_lock);
  86         sbi->ll_rw_stats_on = 0;
  87
  88         si_meminfo(&si);
  89         pages = si.totalram - si.totalhigh;
  90         if (pages >> (20 - PAGE_CACHE_SHIFT) < 512)
  91                 lru_page_max = pages / 2;
  92         else
  93                 lru_page_max = (pages / 4) * 3;
  94
  95         /* initialize lru data */
  96         atomic_set(&sbi->ll_cache.ccc_users, 0);
  97         sbi->ll_cache.ccc_lru_max = lru_page_max;
  98         atomic_set(&sbi->ll_cache.ccc_lru_left, lru_page_max);
  99         spin_lock_init(&sbi->ll_cache.ccc_lru_lock);
 100         INIT_LIST_HEAD(&sbi->ll_cache.ccc_lru);
 101
 102         sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
 103                                            SBI_DEFAULT_READAHEAD_MAX);
 104         sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
 105         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
 106                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
 107         INIT_LIST_HEAD(&sbi->ll_conn_chain);
 108         INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 109
 110         ll_generate_random_uuid(uuid);
 111         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
 112         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 113
 114         spin_lock(&ll_sb_lock);
 115         list_add_tail(&sbi->ll_list, &ll_super_blocks);
 116         spin_unlock(&ll_sb_lock);
 117
 118         sbi->ll_flags |= LL_SBI_VERBOSE;
 119         sbi->ll_flags |= LL_SBI_CHECKSUM;
 120
 121         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 122
 123         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
 124                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 125                                pp_r_hist.oh_lock);
 126                 spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].
 127                                pp_w_hist.oh_lock);
 128         }
 129
 130         /* metadata statahead is enabled by default */
 131         sbi->ll_sa_max = LL_SA_RPC_DEF;
 132         atomic_set(&sbi->ll_sa_total, 0);
 133         atomic_set(&sbi->ll_sa_wrong, 0);
 134         atomic_set(&sbi->ll_agl_total, 0);
 135         sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 136
 137         return sbi;
 138 }
 139
 140 static void ll_free_sbi(struct super_block *sb)
 141 {
 142         struct ll_sb_info *sbi = ll_s2sbi(sb);
 143
 144         if (sbi != NULL) {
 145                 spin_lock(&ll_sb_lock);
 146                 list_del(&sbi->ll_list);
 147                 spin_unlock(&ll_sb_lock);
 148                 OBD_FREE(sbi, sizeof(*sbi));
 149         }
 150 }
 151
 152 static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 153                                     struct vfsmount *mnt)
 154 {
 155         struct inode *root = NULL;
 156         struct ll_sb_info *sbi = ll_s2sbi(sb);
 157         struct obd_device *obd;
 158         struct obd_capa *oc = NULL;
 159         struct obd_statfs *osfs = NULL;
 160         struct ptlrpc_request *request = NULL;
 161         struct obd_connect_data *data = NULL;
 162         struct obd_uuid *uuid;
 163         struct md_op_data *op_data;
 164         struct lustre_md lmd;
 165         u64 valid;
 166         int size, err, checksum;
 167
 168         obd = class_name2obd(md);
 169         if (!obd) {
 170                 CERROR("MD %s: not setup or attached\n", md);
 171                 return -EINVAL;
 172         }
 173
 174         data = kzalloc(sizeof(*data), GFP_NOFS);
 175         if (!data)
 176                 return -ENOMEM;
 177
 178         osfs = kzalloc(sizeof(*osfs), GFP_NOFS);
 179         if (!osfs) {
 180                 OBD_FREE_PTR(data);
 181                 return -ENOMEM;
 182         }
 183
 184         if (proc_lustre_fs_root) {
 185                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
 186                                                   dt, md);
 187                 if (err < 0)
 188                         CERROR("could not register mount in /proc/fs/lustre\n");
 189         }
 190
 191         /* indicate the features supported by this client */
 192         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
 193                                   OBD_CONNECT_ATTRFID  |
 194                                   OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
 195                                   OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
 196                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
 197                                   OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
 198                                   OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
 199                                   OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH|
 200                                   OBD_CONNECT_EINPROGRESS |
 201                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 202                                   OBD_CONNECT_LAYOUTLOCK |
 203                                   OBD_CONNECT_PINGLESS |
 204                                   OBD_CONNECT_MAX_EASIZE |
 205                                   OBD_CONNECT_FLOCK_DEAD |
 206                                   OBD_CONNECT_DISP_STRIPE;
 207
 208         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 209                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 210
 211         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
 212                 data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 213 #ifdef CONFIG_FS_POSIX_ACL
 214         data->ocd_connect_flags |= OBD_CONNECT_ACL | OBD_CONNECT_UMASK;
 215 #endif
 216
 217         if (OBD_FAIL_CHECK(OBD_FAIL_MDC_LIGHTWEIGHT))
 218                 /* flag mdc connection as lightweight, only used for test
 219                  * purpose, use with care */
 220                 data->ocd_connect_flags |= OBD_CONNECT_LIGHTWEIGHT;
 221
 222         data->ocd_ibits_known = MDS_INODELOCK_FULL;
 223         data->ocd_version = LUSTRE_VERSION_CODE;
 224
 225         if (sb->s_flags & MS_RDONLY)
 226                 data->ocd_connect_flags |= OBD_CONNECT_RDONLY;
 227         if (sbi->ll_flags & LL_SBI_USER_XATTR)
 228                 data->ocd_connect_flags |= OBD_CONNECT_XATTR;
 229
 230 #ifdef HAVE_MS_FLOCK_LOCK
 231         /* force vfs to use lustre handler for flock() calls - bug 10743 */
 232         sb->s_flags |= MS_FLOCK_LOCK;
 233 #endif
 234 #ifdef MS_HAS_NEW_AOPS
 235         sb->s_flags |= MS_HAS_NEW_AOPS;
 236 #endif
 237
 238         if (sbi->ll_flags & LL_SBI_FLOCK)
 239                 sbi->ll_fop = &ll_file_operations_flock;
 240         else if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
 241                 sbi->ll_fop = &ll_file_operations;
 242         else
 243                 sbi->ll_fop = &ll_file_operations_noflock;
 244
 245         /* real client */
 246         data->ocd_connect_flags |= OBD_CONNECT_REAL;
 247         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 248                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 249
 250         data->ocd_brw_size = MD_MAX_BRW_SIZE;
 251
 252         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid,
 253                           data, NULL);
 254         if (err == -EBUSY) {
 255                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing recovery, of which this client is not a part. Please wait for recovery to complete, abort, or time out.\n",
 256                                    md);
 257                 goto out;
 258         } else if (err) {
 259                 CERROR("cannot connect to %s: rc = %d\n", md, err);
 260                 goto out;
 261         }
 262
 263         sbi->ll_md_exp->exp_connect_data = *data;
 264
 265         err = obd_fid_init(sbi->ll_md_exp->exp_obd, sbi->ll_md_exp,
 266                            LUSTRE_SEQ_METADATA);
 267         if (err) {
 268                 CERROR("%s: Can't init metadata layer FID infrastructure, rc = %d\n",
 269                        sbi->ll_md_exp->exp_obd->obd_name, err);
 270                 goto out_md;
 271         }
 272
 273         /* For mount, we only need fs info from MDT0, and also in DNE, it
 274          * can make sure the client can be mounted as long as MDT0 is
 275          * available */
 276         err = obd_statfs(NULL, sbi->ll_md_exp, osfs,
 277                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 278                         OBD_STATFS_FOR_MDT0);
 279         if (err)
 280                 goto out_md_fid;
 281
 282         /* This needs to be after statfs to ensure connect has finished.
 283          * Note that "data" does NOT contain the valid connect reply.
 284          * If connecting to a 1.8 server there will be no LMV device, so
 285          * we can access the MDC export directly and exp_connect_flags will
 286          * be non-zero, but if accessing an upgraded 2.1 server it will
 287          * have the correct flags filled in.
 288          * XXX: fill in the LMV exp_connect_flags from MDC(s). */
 289         valid = exp_connect_flags(sbi->ll_md_exp) & CLIENT_CONNECT_MDT_REQD;
 290         if (exp_connect_flags(sbi->ll_md_exp) != 0 &&
 291             valid != CLIENT_CONNECT_MDT_REQD) {
 292                 char *buf;
 293
 294                 buf = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
 295                 obd_connect_flags2str(buf, PAGE_CACHE_SIZE,
 296                                       valid ^ CLIENT_CONNECT_MDT_REQD, ",");
 297                 LCONSOLE_ERROR_MSG(0x170, "Server %s does not support feature(s) needed for correct operation of this client (%s). Please upgrade server or downgrade client.\n",
 298                                    sbi->ll_md_exp->exp_obd->obd_name, buf);
 299                 OBD_FREE(buf, PAGE_CACHE_SIZE);
 300                 err = -EPROTO;
 301                 goto out_md_fid;
 302         }
 303
 304         size = sizeof(*data);
 305         err = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
 306                            KEY_CONN_DATA,  &size, data, NULL);
 307         if (err) {
 308                 CERROR("%s: Get connect data failed: rc = %d\n",
 309                        sbi->ll_md_exp->exp_obd->obd_name, err);
 310                 goto out_md_fid;
 311         }
 312
 313         LASSERT(osfs->os_bsize);
 314         sb->s_blocksize = osfs->os_bsize;
 315         sb->s_blocksize_bits = log2(osfs->os_bsize);
 316         sb->s_magic = LL_SUPER_MAGIC;
 317         sb->s_maxbytes = MAX_LFS_FILESIZE;
 318         sbi->ll_namelen = osfs->os_namelen;
 319         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 320
 321         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
 322             !(data->ocd_connect_flags & OBD_CONNECT_XATTR)) {
 323                 LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
 324                 sbi->ll_flags &= ~LL_SBI_USER_XATTR;
 325         }
 326
 327         if (data->ocd_connect_flags & OBD_CONNECT_ACL) {
 328 #ifdef MS_POSIXACL
 329                 sb->s_flags |= MS_POSIXACL;
 330 #endif
 331                 sbi->ll_flags |= LL_SBI_ACL;
 332         } else {
 333                 LCONSOLE_INFO("client wants to enable acl, but mdt not!\n");
 334 #ifdef MS_POSIXACL
 335                 sb->s_flags &= ~MS_POSIXACL;
 336 #endif
 337                 sbi->ll_flags &= ~LL_SBI_ACL;
 338         }
 339
 340         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
 341                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
 342                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
 343                         LCONSOLE_INFO("client is set as remote by default.\n");
 344                 }
 345         } else {
 346                 if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 347                         sbi->ll_flags &= ~LL_SBI_RMT_CLIENT;
 348                         LCONSOLE_INFO("client claims to be remote, but server rejected, forced to be local.\n");
 349                 }
 350         }
 351
 352         if (data->ocd_connect_flags & OBD_CONNECT_MDS_CAPA) {
 353                 LCONSOLE_INFO("client enabled MDS capability!\n");
 354                 sbi->ll_flags |= LL_SBI_MDS_CAPA;
 355         }
 356
 357         if (data->ocd_connect_flags & OBD_CONNECT_OSS_CAPA) {
 358                 LCONSOLE_INFO("client enabled OSS capability!\n");
 359                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
 360         }
 361
 362         if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
 363                 sbi->ll_flags |= LL_SBI_64BIT_HASH;
 364
 365         if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
 366                 sbi->ll_md_brw_size = data->ocd_brw_size;
 367         else
 368                 sbi->ll_md_brw_size = PAGE_CACHE_SIZE;
 369
 370         if (data->ocd_connect_flags & OBD_CONNECT_LAYOUTLOCK) {
 371                 LCONSOLE_INFO("Layout lock feature supported.\n");
 372                 sbi->ll_flags |= LL_SBI_LAYOUT_LOCK;
 373         }
 374
 375         if (data->ocd_ibits_known & MDS_INODELOCK_XATTR) {
 376                 if (!(data->ocd_connect_flags & OBD_CONNECT_MAX_EASIZE)) {
 377                         LCONSOLE_INFO(
 378                                 "%s: disabling xattr cache due to unknown maximum xattr size.\n",
 379                                 dt);
 380                 } else {
 381                         sbi->ll_flags |= LL_SBI_XATTR_CACHE;
 382                         sbi->ll_xattr_cache_enabled = 1;
 383                 }
 384         }
 385
 386         obd = class_name2obd(dt);
 387         if (!obd) {
 388                 CERROR("DT %s: not setup or attached\n", dt);
 389                 err = -ENODEV;
 390                 goto out_md_fid;
 391         }
 392
 393         data->ocd_connect_flags = OBD_CONNECT_GRANT     | OBD_CONNECT_VERSION  |
 394                                   OBD_CONNECT_REQPORTAL | OBD_CONNECT_BRW_SIZE |
 395                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
 396                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
 397                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
 398                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
 399                                   OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
 400                                   OBD_CONNECT_MAXBYTES |
 401                                   OBD_CONNECT_EINPROGRESS |
 402                                   OBD_CONNECT_JOBSTATS | OBD_CONNECT_LVB_TYPE |
 403                                   OBD_CONNECT_LAYOUTLOCK | OBD_CONNECT_PINGLESS;
 404
 405         if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
 406                 data->ocd_connect_flags |= OBD_CONNECT_SOM;
 407
 408         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
 409                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
 410                  * disabled by default, because it can still be enabled on the
 411                  * fly via /proc. As a consequence, we still need to come to an
 412                  * agreement on the supported algorithms at connect time */
 413                 data->ocd_connect_flags |= OBD_CONNECT_CKSUM;
 414
 415                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
 416                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
 417                 else
 418                         data->ocd_cksum_types = cksum_types_supported_client();
 419         }
 420
 421         data->ocd_connect_flags |= OBD_CONNECT_LRU_RESIZE;
 422         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 423                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 424
 425         CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d ocd_grant: %d\n",
 426                data->ocd_connect_flags,
 427                data->ocd_version, data->ocd_grant);
 428
 429         obd->obd_upcall.onu_owner = &sbi->ll_lco;
 430         obd->obd_upcall.onu_upcall = cl_ocd_update;
 431
 432         data->ocd_brw_size = DT_MAX_BRW_SIZE;
 433
 434         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data,
 435                           NULL);
 436         if (err == -EBUSY) {
 437                 LCONSOLE_ERROR_MSG(0x150, "An OST (dt %s) is performing recovery, of which this client is not a part.  Please wait for recovery to complete, abort, or time out.\n",
 438                                    dt);
 439                 goto out_md;
 440         } else if (err) {
 441                 CERROR("%s: Cannot connect to %s: rc = %d\n",
 442                        sbi->ll_dt_exp->exp_obd->obd_name, dt, err);
 443                 goto out_md;
 444         }
 445
 446         sbi->ll_dt_exp->exp_connect_data = *data;
 447
 448         err = obd_fid_init(sbi->ll_dt_exp->exp_obd, sbi->ll_dt_exp,
 449                            LUSTRE_SEQ_METADATA);
 450         if (err) {
 451                 CERROR("%s: Can't init data layer FID infrastructure, rc = %d\n",
 452                        sbi->ll_dt_exp->exp_obd->obd_name, err);
 453                 goto out_dt;
 454         }
 455
 456         mutex_lock(&sbi->ll_lco.lco_lock);
 457         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
 458         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
 459         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
 460         mutex_unlock(&sbi->ll_lco.lco_lock);
 461
 462         fid_zero(&sbi->ll_root_fid);
 463         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
 464         if (err) {
 465                 CERROR("cannot mds_connect: rc = %d\n", err);
 466                 goto out_lock_cn_cb;
 467         }
 468         if (!fid_is_sane(&sbi->ll_root_fid)) {
 469                 CERROR("%s: Invalid root fid "DFID" during mount\n",
 470                        sbi->ll_md_exp->exp_obd->obd_name,
 471                        PFID(&sbi->ll_root_fid));
 472                 err = -EINVAL;
 473                 goto out_lock_cn_cb;
 474         }
 475         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 476
 477         sb->s_op = &lustre_super_operations;
 478 #if THREAD_SIZE >= 8192 /*b=17630*/
 479         sb->s_export_op = &lustre_export_operations;
 480 #endif
 481
 482         /* make root inode
 483          * XXX: move this to after cbd setup? */
 484         valid = OBD_MD_FLGETATTR | OBD_MD_FLBLOCKS | OBD_MD_FLMDSCAPA;
 485         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 486                 valid |= OBD_MD_FLRMTPERM;
 487         else if (sbi->ll_flags & LL_SBI_ACL)
 488                 valid |= OBD_MD_FLACL;
 489
 490         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
 491         if (!op_data) {
 492                 err = -ENOMEM;
 493                 goto out_lock_cn_cb;
 494         }
 495
 496         op_data->op_fid1 = sbi->ll_root_fid;
 497         op_data->op_mode = 0;
 498         op_data->op_capa1 = oc;
 499         op_data->op_valid = valid;
 500
 501         err = md_getattr(sbi->ll_md_exp, op_data, &request);
 502         if (oc)
 503                 capa_put(oc);
 504         OBD_FREE_PTR(op_data);
 505         if (err) {
 506                 CERROR("%s: md_getattr failed for root: rc = %d\n",
 507                        sbi->ll_md_exp->exp_obd->obd_name, err);
 508                 goto out_lock_cn_cb;
 509         }
 510
 511         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
 512                                sbi->ll_md_exp, &lmd);
 513         if (err) {
 514                 CERROR("failed to understand root inode md: rc = %d\n", err);
 515                 ptlrpc_req_finished(request);
 516                 goto out_lock_cn_cb;
 517         }
 518
 519         LASSERT(fid_is_sane(&sbi->ll_root_fid));
 520         root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid,
 521                                             sbi->ll_flags & LL_SBI_32BIT_API),
 522                        &lmd);
 523         md_free_lustre_md(sbi->ll_md_exp, &lmd);
 524         ptlrpc_req_finished(request);
 525
 526         if (root == NULL || IS_ERR(root)) {
 527                 if (lmd.lsm)
 528                         obd_free_memmd(sbi->ll_dt_exp, &lmd.lsm);
 529 #ifdef CONFIG_FS_POSIX_ACL
 530                 if (lmd.posix_acl) {
 531                         posix_acl_release(lmd.posix_acl);
 532                         lmd.posix_acl = NULL;
 533                 }
 534 #endif
 535                 err = IS_ERR(root) ? PTR_ERR(root) : -EBADF;
 536                 root = NULL;
 537                 CERROR("lustre_lite: bad iget4 for root\n");
 538                 goto out_root;
 539         }
 540
 541         err = ll_close_thread_start(&sbi->ll_lcq);
 542         if (err) {
 543                 CERROR("cannot start close thread: rc %d\n", err);
 544                 goto out_root;
 545         }
 546
 547 #ifdef CONFIG_FS_POSIX_ACL
 548         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 549                 rct_init(&sbi->ll_rct);
 550                 et_init(&sbi->ll_et);
 551         }
 552 #endif
 553
 554         checksum = sbi->ll_flags & LL_SBI_CHECKSUM;
 555         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 556                                  KEY_CHECKSUM, sizeof(checksum), &checksum,
 557                                  NULL);
 558         cl_sb_init(sb);
 559
 560         err = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CACHE_SET),
 561                                  KEY_CACHE_SET, sizeof(sbi->ll_cache),
 562                                  &sbi->ll_cache, NULL);
 563
 564         sb->s_root = d_make_root(root);
 565         if (sb->s_root == NULL) {
 566                 CERROR("%s: can't make root dentry\n",
 567                         ll_get_fsname(sb, NULL, 0));
 568                 err = -ENOMEM;
 569                 goto out_lock_cn_cb;
 570         }
 571
 572         sbi->ll_sdev_orig = sb->s_dev;
 573
 574         /* We set sb->s_dev equal on all lustre clients in order to support
 575          * NFS export clustering.  NFSD requires that the FSID be the same
 576          * on all clients. */
 577         /* s_dev is also used in lt_compare() to compare two fs, but that is
 578          * only a node-local comparison. */
 579         uuid = obd_get_uuid(sbi->ll_md_exp);
 580         if (uuid != NULL) {
 581                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
 582                 get_uuid2fsid(uuid->uuid, strlen(uuid->uuid), &sbi->ll_fsid);
 583         }
 584
 585         if (data != NULL)
 586                 OBD_FREE_PTR(data);
 587         if (osfs != NULL)
 588                 OBD_FREE_PTR(osfs);
 589
 590         return err;
 591 out_root:
 592         iput(root);
 593 out_lock_cn_cb:
 594         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 595 out_dt:
 596         obd_disconnect(sbi->ll_dt_exp);
 597         sbi->ll_dt_exp = NULL;
 598         /* Make sure all OScs are gone, since cl_cache is accessing sbi. */
 599         obd_zombie_barrier();
 600 out_md_fid:
 601         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 602 out_md:
 603         obd_disconnect(sbi->ll_md_exp);
 604         sbi->ll_md_exp = NULL;
 605 out:
 606         if (data != NULL)
 607                 OBD_FREE_PTR(data);
 608         if (osfs != NULL)
 609                 OBD_FREE_PTR(osfs);
 610         lprocfs_unregister_mountpoint(sbi);
 611         return err;
 612 }
 613
 614 int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 615 {
 616         int size, rc;
 617
 618         *lmmsize = obd_size_diskmd(sbi->ll_dt_exp, NULL);
 619         size = sizeof(int);
 620         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_EASIZE),
 621                           KEY_MAX_EASIZE, &size, lmmsize, NULL);
 622         if (rc)
 623                 CERROR("Get max mdsize error rc %d\n", rc);
 624
 625         return rc;
 626 }
 627
 628 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 629 {
 630         int size, rc;
 631
 632         size = sizeof(int);
 633         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_EASIZE),
 634                          KEY_DEFAULT_EASIZE, &size, lmmsize, NULL);
 635         if (rc)
 636                 CERROR("Get default mdsize error rc %d\n", rc);
 637
 638         return rc;
 639 }
 640
 641 int ll_get_max_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 642 {
 643         int size, rc;
 644
 645         size = sizeof(int);
 646         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_MAX_COOKIESIZE),
 647                           KEY_MAX_COOKIESIZE, &size, lmmsize, NULL);
 648         if (rc)
 649                 CERROR("Get max cookiesize error rc %d\n", rc);
 650
 651         return rc;
 652 }
 653
 654 int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 655 {
 656         int size, rc;
 657
 658         size = sizeof(int);
 659         rc = obd_get_info(NULL, sbi->ll_md_exp, sizeof(KEY_DEFAULT_COOKIESIZE),
 660                           KEY_DEFAULT_COOKIESIZE, &size, lmmsize, NULL);
 661         if (rc)
 662                 CERROR("Get default cookiesize error rc %d\n", rc);
 663
 664         return rc;
 665 }
 666
 667 static void client_common_put_super(struct super_block *sb)
 668 {
 669         struct ll_sb_info *sbi = ll_s2sbi(sb);
 670
 671 #ifdef CONFIG_FS_POSIX_ACL
 672         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
 673                 et_fini(&sbi->ll_et);
 674                 rct_fini(&sbi->ll_rct);
 675         }
 676 #endif
 677
 678         ll_close_thread_shutdown(sbi->ll_lcq);
 679
 680         cl_sb_fini(sb);
 681
 682         list_del(&sbi->ll_conn_chain);
 683
 684         obd_fid_fini(sbi->ll_dt_exp->exp_obd);
 685         obd_disconnect(sbi->ll_dt_exp);
 686         sbi->ll_dt_exp = NULL;
 687         /* wait till all OSCs are gone, since cl_cache is accessing sbi.
 688          * see LU-2543. */
 689         obd_zombie_barrier();
 690
 691         lprocfs_unregister_mountpoint(sbi);
 692
 693         obd_fid_fini(sbi->ll_md_exp->exp_obd);
 694         obd_disconnect(sbi->ll_md_exp);
 695         sbi->ll_md_exp = NULL;
 696 }
 697
 698 void ll_kill_super(struct super_block *sb)
 699 {
 700         struct ll_sb_info *sbi;
 701
 702         /* not init sb ?*/
 703         if (!(sb->s_flags & MS_ACTIVE))
 704                 return;
 705
 706         sbi = ll_s2sbi(sb);
 707         /* we need to restore s_dev from changed for clustered NFS before
 708          * put_super because new kernels have cached s_dev and change sb->s_dev
 709          * in put_super not affected real removing devices */
 710         if (sbi) {
 711                 sb->s_dev = sbi->ll_sdev_orig;
 712                 sbi->ll_umounting = 1;
 713         }
 714 }
 715
 716 static inline int ll_set_opt(const char *opt, char *data, int fl)
 717 {
 718         if (strncmp(opt, data, strlen(opt)) != 0)
 719                 return 0;
 720         else
 721                 return fl;
 722 }
 723
 724 /* non-client-specific mount options are parsed in lmd_parse */
 725 static int ll_options(char *options, int *flags)
 726 {
 727         int tmp;
 728         char *s1 = options, *s2;
 729
 730         if (!options)
 731                 return 0;
 732
 733         CDEBUG(D_CONFIG, "Parsing opts %s\n", options);
 734
 735         while (*s1) {
 736                 CDEBUG(D_SUPER, "next opt=%s\n", s1);
 737                 tmp = ll_set_opt("nolock", s1, LL_SBI_NOLCK);
 738                 if (tmp) {
 739                         *flags |= tmp;
 740                         goto next;
 741                 }
 742                 tmp = ll_set_opt("flock", s1, LL_SBI_FLOCK);
 743                 if (tmp) {
 744                         *flags |= tmp;
 745                         goto next;
 746                 }
 747                 tmp = ll_set_opt("localflock", s1, LL_SBI_LOCALFLOCK);
 748                 if (tmp) {
 749                         *flags |= tmp;
 750                         goto next;
 751                 }
 752                 tmp = ll_set_opt("noflock", s1, LL_SBI_FLOCK|LL_SBI_LOCALFLOCK);
 753                 if (tmp) {
 754                         *flags &= ~tmp;
 755                         goto next;
 756                 }
 757                 tmp = ll_set_opt("user_xattr", s1, LL_SBI_USER_XATTR);
 758                 if (tmp) {
 759                         *flags |= tmp;
 760                         goto next;
 761                 }
 762                 tmp = ll_set_opt("nouser_xattr", s1, LL_SBI_USER_XATTR);
 763                 if (tmp) {
 764                         *flags &= ~tmp;
 765                         goto next;
 766                 }
 767                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
 768                 if (tmp) {
 769                         *flags |= tmp;
 770                         goto next;
 771                 }
 772                 tmp = ll_set_opt("user_fid2path", s1, LL_SBI_USER_FID2PATH);
 773                 if (tmp) {
 774                         *flags |= tmp;
 775                         goto next;
 776                 }
 777                 tmp = ll_set_opt("nouser_fid2path", s1, LL_SBI_USER_FID2PATH);
 778                 if (tmp) {
 779                         *flags &= ~tmp;
 780                         goto next;
 781                 }
 782
 783                 tmp = ll_set_opt("checksum", s1, LL_SBI_CHECKSUM);
 784                 if (tmp) {
 785                         *flags |= tmp;
 786                         goto next;
 787                 }
 788                 tmp = ll_set_opt("nochecksum", s1, LL_SBI_CHECKSUM);
 789                 if (tmp) {
 790                         *flags &= ~tmp;
 791                         goto next;
 792                 }
 793                 tmp = ll_set_opt("lruresize", s1, LL_SBI_LRU_RESIZE);
 794                 if (tmp) {
 795                         *flags |= tmp;
 796                         goto next;
 797                 }
 798                 tmp = ll_set_opt("nolruresize", s1, LL_SBI_LRU_RESIZE);
 799                 if (tmp) {
 800                         *flags &= ~tmp;
 801                         goto next;
 802                 }
 803                 tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
 804                 if (tmp) {
 805                         *flags |= tmp;
 806                         goto next;
 807                 }
 808                 tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
 809                 if (tmp) {
 810                         *flags &= ~tmp;
 811                         goto next;
 812                 }
 813                 tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
 814                 if (tmp) {
 815                         *flags |= tmp;
 816                         goto next;
 817                 }
 818                 tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
 819                 if (tmp) {
 820                         *flags |= tmp;
 821                         goto next;
 822                 }
 823                 tmp = ll_set_opt("verbose", s1, LL_SBI_VERBOSE);
 824                 if (tmp) {
 825                         *flags |= tmp;
 826                         goto next;
 827                 }
 828                 tmp = ll_set_opt("noverbose", s1, LL_SBI_VERBOSE);
 829                 if (tmp) {
 830                         *flags &= ~tmp;
 831                         goto next;
 832                 }
 833                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
 834                                    s1);
 835                 return -EINVAL;
 836
 837 next:
 838                 /* Find next opt */
 839                 s2 = strchr(s1, ',');
 840                 if (s2 == NULL)
 841                         break;
 842                 s1 = s2 + 1;
 843         }
 844         return 0;
 845 }
 846
 847 void ll_lli_init(struct ll_inode_info *lli)
 848 {
 849         lli->lli_inode_magic = LLI_INODE_MAGIC;
 850         lli->lli_flags = 0;
 851         lli->lli_ioepoch = 0;
 852         lli->lli_maxbytes = MAX_LFS_FILESIZE;
 853         spin_lock_init(&lli->lli_lock);
 854         lli->lli_posix_acl = NULL;
 855         lli->lli_remote_perms = NULL;
 856         mutex_init(&lli->lli_rmtperm_mutex);
 857         /* Do not set lli_fid, it has been initialized already. */
 858         fid_zero(&lli->lli_pfid);
 859         INIT_LIST_HEAD(&lli->lli_close_list);
 860         INIT_LIST_HEAD(&lli->lli_oss_capas);
 861         atomic_set(&lli->lli_open_count, 0);
 862         lli->lli_mds_capa = NULL;
 863         lli->lli_rmtperm_time = 0;
 864         lli->lli_pending_och = NULL;
 865         lli->lli_mds_read_och = NULL;
 866         lli->lli_mds_write_och = NULL;
 867         lli->lli_mds_exec_och = NULL;
 868         lli->lli_open_fd_read_count = 0;
 869         lli->lli_open_fd_write_count = 0;
 870         lli->lli_open_fd_exec_count = 0;
 871         mutex_init(&lli->lli_och_mutex);
 872         spin_lock_init(&lli->lli_agl_lock);
 873         lli->lli_has_smd = false;
 874         spin_lock_init(&lli->lli_layout_lock);
 875         ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
 876         lli->lli_clob = NULL;
 877
 878         init_rwsem(&lli->lli_xattrs_list_rwsem);
 879         mutex_init(&lli->lli_xattrs_enq_lock);
 880
 881         LASSERT(lli->lli_vfs_inode.i_mode != 0);
 882         if (S_ISDIR(lli->lli_vfs_inode.i_mode)) {
 883                 mutex_init(&lli->lli_readdir_mutex);
 884                 lli->lli_opendir_key = NULL;
 885                 lli->lli_sai = NULL;
 886                 spin_lock_init(&lli->lli_sa_lock);
 887                 lli->lli_opendir_pid = 0;
 888         } else {
 889                 mutex_init(&lli->lli_size_mutex);
 890                 lli->lli_symlink_name = NULL;
 891                 init_rwsem(&lli->lli_trunc_sem);
 892                 mutex_init(&lli->lli_write_mutex);
 893                 init_rwsem(&lli->lli_glimpse_sem);
 894                 lli->lli_glimpse_time = 0;
 895                 INIT_LIST_HEAD(&lli->lli_agl_list);
 896                 lli->lli_agl_index = 0;
 897                 lli->lli_async_rc = 0;
 898         }
 899         mutex_init(&lli->lli_layout_mutex);
 900 }
 901
 902 static inline int ll_bdi_register(struct backing_dev_info *bdi)
 903 {
 904         static atomic_t ll_bdi_num = ATOMIC_INIT(0);
 905
 906         bdi->name = "lustre";
 907         return bdi_register(bdi, NULL, "lustre-%d",
 908                             atomic_inc_return(&ll_bdi_num));
 909 }
 910
 911 int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
 912 {
 913         struct lustre_profile *lprof = NULL;
 914         struct lustre_sb_info *lsi = s2lsi(sb);
 915         struct ll_sb_info *sbi;
 916         char  *dt = NULL, *md = NULL;
 917         char  *profilenm = get_profile_name(sb);
 918         struct config_llog_instance *cfg;
 919         /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
 920         const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
 921         int    err;
 922
 923         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 924
 925         cfg = kzalloc(sizeof(*cfg), GFP_NOFS);
 926         if (!cfg)
 927                 return -ENOMEM;
 928
 929         try_module_get(THIS_MODULE);
 930
 931         /* client additional sb info */
 932         lsi->lsi_llsbi = sbi = ll_init_sbi();
 933         if (!sbi) {
 934                 module_put(THIS_MODULE);
 935                 OBD_FREE_PTR(cfg);
 936                 return -ENOMEM;
 937         }
 938
 939         err = ll_options(lsi->lsi_lmd->lmd_opts, &sbi->ll_flags);
 940         if (err)
 941                 goto out_free;
 942
 943         err = bdi_init(&lsi->lsi_bdi);
 944         if (err)
 945                 goto out_free;
 946         lsi->lsi_flags |= LSI_BDI_INITIALIZED;
 947         lsi->lsi_bdi.capabilities = 0;
 948         err = ll_bdi_register(&lsi->lsi_bdi);
 949         if (err)
 950                 goto out_free;
 951
 952         sb->s_bdi = &lsi->lsi_bdi;
 953         /* kernel >= 2.6.38 store dentry operations in sb->s_d_op. */
 954         sb->s_d_op = &ll_d_ops;
 955
 956         /* Generate a string unique to this super, in case some joker tries
 957            to mount the same fs at two mount points.
 958            Use the address of the super itself.*/
 959         cfg->cfg_instance = sb;
 960         cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 961         cfg->cfg_callback = class_config_llog_handler;
 962         /* set up client obds */
 963         err = lustre_process_log(sb, profilenm, cfg);
 964         if (err < 0) {
 965                 CERROR("Unable to process log: %d\n", err);
 966                 goto out_free;
 967         }
 968
 969         /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
 970         lprof = class_get_profile(profilenm);
 971         if (lprof == NULL) {
 972                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be read from the MGS.  Does that filesystem exist?\n",
 973                                    profilenm);
 974                 err = -EINVAL;
 975                 goto out_free;
 976         }
 977         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
 978                lprof->lp_md, lprof->lp_dt);
 979
 980         dt = kasprintf(GFP_NOFS, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
 981         if (!dt) {
 982                 err = -ENOMEM;
 983                 goto out_free;
 984         }
 985
 986         md = kasprintf(GFP_NOFS, "%s-%p", lprof->lp_md, cfg->cfg_instance);
 987         if (!md) {
 988                 err = -ENOMEM;
 989                 goto out_free;
 990         }
 991
 992         /* connections, registrations, sb setup */
 993         err = client_common_fill_super(sb, md, dt, mnt);
 994
 995 out_free:
 996         if (md)
 997                 OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
 998         if (dt)
 999                 OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
1000         if (err)
1001                 ll_put_super(sb);
1002         else if (sbi->ll_flags & LL_SBI_VERBOSE)
1003                 LCONSOLE_WARN("Mounted %s\n", profilenm);
1004
1005         OBD_FREE_PTR(cfg);
1006         return err;
1007 } /* ll_fill_super */
1008
1009 void ll_put_super(struct super_block *sb)
1010 {
1011         struct config_llog_instance cfg, params_cfg;
1012         struct obd_device *obd;
1013         struct lustre_sb_info *lsi = s2lsi(sb);
1014         struct ll_sb_info *sbi = ll_s2sbi(sb);
1015         char *profilenm = get_profile_name(sb);
1016         int next, force = 1;
1017
1018         CDEBUG(D_VFSTRACE, "VFS Op: sb %p - %s\n", sb, profilenm);
1019
1020         ll_print_capa_stat(sbi);
1021
1022         cfg.cfg_instance = sb;
1023         lustre_end_log(sb, profilenm, &cfg);
1024
1025         params_cfg.cfg_instance = sb;
1026         lustre_end_log(sb, PARAMS_FILENAME, &params_cfg);
1027
1028         if (sbi->ll_md_exp) {
1029                 obd = class_exp2obd(sbi->ll_md_exp);
1030                 if (obd)
1031                         force = obd->obd_force;
1032         }
1033
1034         /* We need to set force before the lov_disconnect in
1035            lustre_common_put_super, since l_d cleans up osc's as well. */
1036         if (force) {
1037                 next = 0;
1038                 while ((obd = class_devices_in_group(&sbi->ll_sb_uuid,
1039                                                      &next)) != NULL) {
1040                         obd->obd_force = force;
1041                 }
1042         }
1043
1044         if (sbi->ll_lcq) {
1045                 /* Only if client_common_fill_super succeeded */
1046                 client_common_put_super(sb);
1047         }
1048
1049         next = 0;
1050         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)))
1051                 class_manual_cleanup(obd);
1052
1053         if (sbi->ll_flags & LL_SBI_VERBOSE)
1054                 LCONSOLE_WARN("Unmounted %s\n", profilenm ? profilenm : "");
1055
1056         if (profilenm)
1057                 class_del_profile(profilenm);
1058
1059         if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
1060                 bdi_destroy(&lsi->lsi_bdi);
1061                 lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
1062         }
1063
1064         ll_free_sbi(sb);
1065         lsi->lsi_llsbi = NULL;
1066
1067         lustre_common_put_super(sb);
1068
1069         module_put(THIS_MODULE);
1070 } /* client_put_super */
1071
1072 struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock)
1073 {
1074         struct inode *inode = NULL;
1075
1076         /* NOTE: we depend on atomic igrab() -bzzz */
1077         lock_res_and_lock(lock);
1078         if (lock->l_resource->lr_lvb_inode) {
1079                 struct ll_inode_info *lli;
1080
1081                 lli = ll_i2info(lock->l_resource->lr_lvb_inode);
1082                 if (lli->lli_inode_magic == LLI_INODE_MAGIC) {
1083                         inode = igrab(lock->l_resource->lr_lvb_inode);
1084                 } else {
1085                         inode = lock->l_resource->lr_lvb_inode;
1086                         LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
1087                                          D_WARNING, lock, "lr_lvb_inode %p is bogus: magic %08x",
1088                                          lock->l_resource->lr_lvb_inode,
1089                                          lli->lli_inode_magic);
1090                         inode = NULL;
1091                 }
1092         }
1093         unlock_res_and_lock(lock);
1094         return inode;
1095 }
1096
1097 void ll_clear_inode(struct inode *inode)
1098 {
1099         struct ll_inode_info *lli = ll_i2info(inode);
1100         struct ll_sb_info *sbi = ll_i2sbi(inode);
1101
1102         CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
1103                inode->i_generation, inode);
1104
1105         if (S_ISDIR(inode->i_mode)) {
1106                 /* these should have been cleared in ll_file_release */
1107                 LASSERT(lli->lli_opendir_key == NULL);
1108                 LASSERT(lli->lli_sai == NULL);
1109                 LASSERT(lli->lli_opendir_pid == 0);
1110         }
1111
1112         spin_lock(&lli->lli_lock);
1113         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
1114         spin_unlock(&lli->lli_lock);
1115         md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
1116
1117         LASSERT(!lli->lli_open_fd_write_count);
1118         LASSERT(!lli->lli_open_fd_read_count);
1119         LASSERT(!lli->lli_open_fd_exec_count);
1120
1121         if (lli->lli_mds_write_och)
1122                 ll_md_real_close(inode, FMODE_WRITE);
1123         if (lli->lli_mds_exec_och)
1124                 ll_md_real_close(inode, FMODE_EXEC);
1125         if (lli->lli_mds_read_och)
1126                 ll_md_real_close(inode, FMODE_READ);
1127
1128         if (S_ISLNK(inode->i_mode) && lli->lli_symlink_name) {
1129                 OBD_FREE(lli->lli_symlink_name,
1130                          strlen(lli->lli_symlink_name) + 1);
1131                 lli->lli_symlink_name = NULL;
1132         }
1133
1134         ll_xattr_cache_destroy(inode);
1135
1136         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1137                 LASSERT(lli->lli_posix_acl == NULL);
1138                 if (lli->lli_remote_perms) {
1139                         free_rmtperm_hash(lli->lli_remote_perms);
1140                         lli->lli_remote_perms = NULL;
1141                 }
1142         }
1143 #ifdef CONFIG_FS_POSIX_ACL
1144         else if (lli->lli_posix_acl) {
1145                 LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
1146                 LASSERT(lli->lli_remote_perms == NULL);
1147                 posix_acl_release(lli->lli_posix_acl);
1148                 lli->lli_posix_acl = NULL;
1149         }
1150 #endif
1151         lli->lli_inode_magic = LLI_INODE_DEAD;
1152
1153         ll_clear_inode_capas(inode);
1154         if (!S_ISDIR(inode->i_mode))
1155                 LASSERT(list_empty(&lli->lli_agl_list));
1156
1157         /*
1158          * XXX This has to be done before lsm is freed below, because
1159          * cl_object still uses inode lsm.
1160          */
1161         cl_inode_fini(inode);
1162         lli->lli_has_smd = false;
1163 }
1164
1165 static int ll_md_setattr(struct dentry *dentry, struct md_op_data *op_data,
1166                   struct md_open_data **mod)
1167 {
1168         struct lustre_md md;
1169         struct inode *inode = d_inode(dentry);
1170         struct ll_sb_info *sbi = ll_i2sbi(inode);
1171         struct ptlrpc_request *request = NULL;
1172         int rc, ia_valid;
1173
1174         op_data = ll_prep_md_op_data(op_data, inode, NULL, NULL, 0, 0,
1175                                      LUSTRE_OPC_ANY, NULL);
1176         if (IS_ERR(op_data))
1177                 return PTR_ERR(op_data);
1178
1179         rc = md_setattr(sbi->ll_md_exp, op_data, NULL, 0, NULL, 0,
1180                         &request, mod);
1181         if (rc) {
1182                 ptlrpc_req_finished(request);
1183                 if (rc == -ENOENT) {
1184                         clear_nlink(inode);
1185                         /* Unlinked special device node? Or just a race?
1186                          * Pretend we done everything. */
1187                         if (!S_ISREG(inode->i_mode) &&
1188                             !S_ISDIR(inode->i_mode)) {
1189                                 ia_valid = op_data->op_attr.ia_valid;
1190                                 op_data->op_attr.ia_valid &= ~TIMES_SET_FLAGS;
1191                                 rc = simple_setattr(dentry, &op_data->op_attr);
1192                                 op_data->op_attr.ia_valid = ia_valid;
1193                         }
1194                 } else if (rc != -EPERM && rc != -EACCES && rc != -ETXTBSY) {
1195                         CERROR("md_setattr fails: rc = %d\n", rc);
1196                 }
1197                 return rc;
1198         }
1199
1200         rc = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
1201                               sbi->ll_md_exp, &md);
1202         if (rc) {
1203                 ptlrpc_req_finished(request);
1204                 return rc;
1205         }
1206
1207         ia_valid = op_data->op_attr.ia_valid;
1208         /* inode size will be in ll_setattr_ost, can't do it now since dirty
1209          * cache is not cleared yet. */
1210         op_data->op_attr.ia_valid &= ~(TIMES_SET_FLAGS | ATTR_SIZE);
1211         rc = simple_setattr(dentry, &op_data->op_attr);
1212         op_data->op_attr.ia_valid = ia_valid;
1213
1214         /* Extract epoch data if obtained. */
1215         op_data->op_handle = md.body->handle;
1216         op_data->op_ioepoch = md.body->ioepoch;
1217
1218         ll_update_inode(inode, &md);
1219         ptlrpc_req_finished(request);
1220
1221         return rc;
1222 }
1223
1224 /* Close IO epoch and send Size-on-MDS attribute update. */
1225 static int ll_setattr_done_writing(struct inode *inode,
1226                                    struct md_op_data *op_data,
1227                                    struct md_open_data *mod)
1228 {
1229         struct ll_inode_info *lli = ll_i2info(inode);
1230         int rc = 0;
1231
1232         LASSERT(op_data != NULL);
1233         if (!S_ISREG(inode->i_mode))
1234                 return 0;
1235
1236         CDEBUG(D_INODE, "Epoch %llu closed on "DFID" for truncate\n",
1237                op_data->op_ioepoch, PFID(&lli->lli_fid));
1238
1239         op_data->op_flags = MF_EPOCH_CLOSE;
1240         ll_done_writing_attr(inode, op_data);
1241         ll_pack_inode2opdata(inode, op_data, NULL);
1242
1243         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
1244         if (rc == -EAGAIN) {
1245                 /* MDS has instructed us to obtain Size-on-MDS attribute
1246                  * from OSTs and send setattr to back to MDS. */
1247                 rc = ll_som_update(inode, op_data);
1248         } else if (rc) {
1249                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
1250                        inode->i_ino, rc);
1251         }
1252         return rc;
1253 }
1254
1255 static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
1256 {
1257         struct obd_capa *capa;
1258         int rc;
1259
1260         if (attr->ia_valid & ATTR_SIZE)
1261                 capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
1262         else
1263                 capa = ll_mdscapa_get(inode);
1264
1265         rc = cl_setattr_ost(inode, attr, capa);
1266
1267         if (attr->ia_valid & ATTR_SIZE)
1268                 ll_truncate_free_capa(capa);
1269         else
1270                 capa_put(capa);
1271
1272         return rc;
1273 }
1274
1275
1276 /* If this inode has objects allocated to it (lsm != NULL), then the OST
1277  * object(s) determine the file size and mtime.  Otherwise, the MDS will
1278  * keep these values until such a time that objects are allocated for it.
1279  * We do the MDS operations first, as it is checking permissions for us.
1280  * We don't to the MDS RPC if there is nothing that we want to store there,
1281  * otherwise there is no harm in updating mtime/atime on the MDS if we are
1282  * going to do an RPC anyways.
1283  *
1284  * If we are doing a truncate, we will send the mtime and ctime updates
1285  * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
1286  * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
1287  * at the same time.
1288  *
1289  * In case of HSMimport, we only set attr on MDS.
1290  */
1291 int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import)
1292 {
1293         struct inode *inode = d_inode(dentry);
1294         struct ll_inode_info *lli = ll_i2info(inode);
1295         struct md_op_data *op_data = NULL;
1296         struct md_open_data *mod = NULL;
1297         bool file_is_released = false;
1298         int rc = 0, rc1 = 0;
1299
1300         CDEBUG(D_VFSTRACE,
1301                 "%s: setattr inode %p/fid:"DFID
1302                 " from %llu to %llu, valid %x, hsm_import %d\n",
1303                 ll_get_fsname(inode->i_sb, NULL, 0), inode,
1304                 PFID(&lli->lli_fid), i_size_read(inode), attr->ia_size,
1305                 attr->ia_valid, hsm_import);
1306
1307         if (attr->ia_valid & ATTR_SIZE) {
1308                 /* Check new size against VFS/VM file size limit and rlimit */
1309                 rc = inode_newsize_ok(inode, attr->ia_size);
1310                 if (rc)
1311                         return rc;
1312
1313                 /* The maximum Lustre file size is variable, based on the
1314                  * OST maximum object size and number of stripes.  This
1315                  * needs another check in addition to the VFS check above. */
1316                 if (attr->ia_size > ll_file_maxbytes(inode)) {
1317                         CDEBUG(D_INODE, "file "DFID" too large %llu > %llu\n",
1318                                PFID(&lli->lli_fid), attr->ia_size,
1319                                ll_file_maxbytes(inode));
1320                         return -EFBIG;
1321                 }
1322
1323                 attr->ia_valid |= ATTR_MTIME | ATTR_CTIME;
1324         }
1325
1326         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
1327         if (attr->ia_valid & TIMES_SET_FLAGS) {
1328                 if ((!uid_eq(current_fsuid(), inode->i_uid)) &&
1329                     !capable(CFS_CAP_FOWNER))
1330                         return -EPERM;
1331         }
1332
1333         /* We mark all of the fields "set" so MDS/OST does not re-set them */
1334         if (attr->ia_valid & ATTR_CTIME) {
1335                 attr->ia_ctime = CURRENT_TIME;
1336                 attr->ia_valid |= ATTR_CTIME_SET;
1337         }
1338         if (!(attr->ia_valid & ATTR_ATIME_SET) &&
1339             (attr->ia_valid & ATTR_ATIME)) {
1340                 attr->ia_atime = CURRENT_TIME;
1341                 attr->ia_valid |= ATTR_ATIME_SET;
1342         }
1343         if (!(attr->ia_valid & ATTR_MTIME_SET) &&
1344             (attr->ia_valid & ATTR_MTIME)) {
1345                 attr->ia_mtime = CURRENT_TIME;
1346                 attr->ia_valid |= ATTR_MTIME_SET;
1347         }
1348
1349         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
1350                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
1351                        LTIME_S(attr->ia_mtime), LTIME_S(attr->ia_ctime),
1352                        get_seconds());
1353
1354         /* If we are changing file size, file content is modified, flag it. */
1355         if (attr->ia_valid & ATTR_SIZE) {
1356                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1357                 spin_lock(&lli->lli_lock);
1358                 lli->lli_flags |= LLIF_DATA_MODIFIED;
1359                 spin_unlock(&lli->lli_lock);
1360         }
1361
1362         /* We always do an MDS RPC, even if we're only changing the size;
1363          * only the MDS knows whether truncate() should fail with -ETXTBUSY */
1364
1365         op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
1366         if (!op_data)
1367                 return -ENOMEM;
1368
1369         if (!S_ISDIR(inode->i_mode)) {
1370                 if (attr->ia_valid & ATTR_SIZE)
1371                         inode_dio_write_done(inode);
1372                 mutex_unlock(&inode->i_mutex);
1373         }
1374
1375         memcpy(&op_data->op_attr, attr, sizeof(*attr));
1376
1377         /* Open epoch for truncate. */
1378         if (exp_connect_som(ll_i2mdexp(inode)) &&
1379             (attr->ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
1380                 op_data->op_flags = MF_EPOCH_OPEN;
1381
1382         /* truncate on a released file must failed with -ENODATA,
1383          * so size must not be set on MDS for released file
1384          * but other attributes must be set
1385          */
1386         if (S_ISREG(inode->i_mode)) {
1387                 struct lov_stripe_md *lsm;
1388                 __u32 gen;
1389
1390                 ll_layout_refresh(inode, &gen);
1391                 lsm = ccc_inode_lsm_get(inode);
1392                 if (lsm && lsm->lsm_pattern & LOV_PATTERN_F_RELEASED)
1393                         file_is_released = true;
1394                 ccc_inode_lsm_put(inode, lsm);
1395         }
1396
1397         /* if not in HSM import mode, clear size attr for released file
1398          * we clear the attribute send to MDT in op_data, not the original
1399          * received from caller in attr which is used later to
1400          * decide return code */
1401         if (file_is_released && (attr->ia_valid & ATTR_SIZE) && !hsm_import)
1402                 op_data->op_attr.ia_valid &= ~ATTR_SIZE;
1403
1404         rc = ll_md_setattr(dentry, op_data, &mod);
1405         if (rc)
1406                 goto out;
1407
1408         /* truncate failed (only when non HSM import), others succeed */
1409         if (file_is_released) {
1410                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1411                         rc = -ENODATA;
1412                 else
1413                         rc = 0;
1414                 goto out;
1415         }
1416
1417         /* RPC to MDT is sent, cancel data modification flag */
1418         if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) {
1419                 spin_lock(&lli->lli_lock);
1420                 lli->lli_flags &= ~LLIF_DATA_MODIFIED;
1421                 spin_unlock(&lli->lli_lock);
1422         }
1423
1424         ll_ioepoch_open(lli, op_data->op_ioepoch);
1425         if (!S_ISREG(inode->i_mode)) {
1426                 rc = 0;
1427                 goto out;
1428         }
1429
1430         if (attr->ia_valid & (ATTR_SIZE |
1431                               ATTR_ATIME | ATTR_ATIME_SET |
1432                               ATTR_MTIME | ATTR_MTIME_SET)) {
1433                 /* For truncate and utimes sending attributes to OSTs, setting
1434                  * mtime/atime to the past will be performed under PW [0:EOF]
1435                  * extent lock (new_size:EOF for truncate).  It may seem
1436                  * excessive to send mtime/atime updates to OSTs when not
1437                  * setting times to past, but it is necessary due to possible
1438                  * time de-synchronization between MDT inode and OST objects */
1439                 if (attr->ia_valid & ATTR_SIZE)
1440                         down_write(&lli->lli_trunc_sem);
1441                 rc = ll_setattr_ost(inode, attr);
1442                 if (attr->ia_valid & ATTR_SIZE)
1443                         up_write(&lli->lli_trunc_sem);
1444         }
1445 out:
1446         if (op_data) {
1447                 if (op_data->op_ioepoch) {
1448                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
1449                         if (!rc)
1450                                 rc = rc1;
1451                 }
1452                 ll_finish_md_op_data(op_data);
1453         }
1454         if (!S_ISDIR(inode->i_mode)) {
1455                 mutex_lock(&inode->i_mutex);
1456                 if ((attr->ia_valid & ATTR_SIZE) && !hsm_import)
1457                         inode_dio_wait(inode);
1458         }
1459
1460         ll_stats_ops_tally(ll_i2sbi(inode), (attr->ia_valid & ATTR_SIZE) ?
1461                         LPROC_LL_TRUNC : LPROC_LL_SETATTR, 1);
1462
1463         return rc;
1464 }
1465
1466 int ll_setattr(struct dentry *de, struct iattr *attr)
1467 {
1468         int mode = d_inode(de)->i_mode;
1469
1470         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
1471                               (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
1472                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
1473
1474         if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
1475                                (ATTR_SIZE|ATTR_MODE)) &&
1476             (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
1477              (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1478               !(attr->ia_mode & S_ISGID))))
1479                 attr->ia_valid |= ATTR_FORCE;
1480
1481         if ((attr->ia_valid & ATTR_MODE) &&
1482             (mode & S_ISUID) &&
1483             !(attr->ia_mode & S_ISUID) &&
1484             !(attr->ia_valid & ATTR_KILL_SUID))
1485                 attr->ia_valid |= ATTR_KILL_SUID;
1486
1487         if ((attr->ia_valid & ATTR_MODE) &&
1488             ((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
1489             !(attr->ia_mode & S_ISGID) &&
1490             !(attr->ia_valid & ATTR_KILL_SGID))
1491                 attr->ia_valid |= ATTR_KILL_SGID;
1492
1493         return ll_setattr_raw(de, attr, false);
1494 }
1495
1496 int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
1497                        __u64 max_age, __u32 flags)
1498 {
1499         struct ll_sb_info *sbi = ll_s2sbi(sb);
1500         struct obd_statfs obd_osfs;
1501         int rc;
1502
1503         rc = obd_statfs(NULL, sbi->ll_md_exp, osfs, max_age, flags);
1504         if (rc) {
1505                 CERROR("md_statfs fails: rc = %d\n", rc);
1506                 return rc;
1507         }
1508
1509         osfs->os_type = sb->s_magic;
1510
1511         CDEBUG(D_SUPER, "MDC blocks %llu/%llu objects %llu/%llu\n",
1512                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,
1513                osfs->os_files);
1514
1515         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
1516                 flags |= OBD_STATFS_NODELAY;
1517
1518         rc = obd_statfs_rqset(sbi->ll_dt_exp, &obd_osfs, max_age, flags);
1519         if (rc) {
1520                 CERROR("obd_statfs fails: rc = %d\n", rc);
1521                 return rc;
1522         }
1523
1524         CDEBUG(D_SUPER, "OSC blocks %llu/%llu objects %llu/%llu\n",
1525                obd_osfs.os_bavail, obd_osfs.os_blocks, obd_osfs.os_ffree,
1526                obd_osfs.os_files);
1527
1528         osfs->os_bsize = obd_osfs.os_bsize;
1529         osfs->os_blocks = obd_osfs.os_blocks;
1530         osfs->os_bfree = obd_osfs.os_bfree;
1531         osfs->os_bavail = obd_osfs.os_bavail;
1532
1533         /* If we don't have as many objects free on the OST as inodes
1534          * on the MDS, we reduce the total number of inodes to
1535          * compensate, so that the "inodes in use" number is correct.
1536          */
1537         if (obd_osfs.os_ffree < osfs->os_ffree) {
1538                 osfs->os_files = (osfs->os_files - osfs->os_ffree) +
1539                         obd_osfs.os_ffree;
1540                 osfs->os_ffree = obd_osfs.os_ffree;
1541         }
1542
1543         return rc;
1544 }
1545 int ll_statfs(struct dentry *de, struct kstatfs *sfs)
1546 {
1547         struct super_block *sb = de->d_sb;
1548         struct obd_statfs osfs;
1549         int rc;
1550
1551         CDEBUG(D_VFSTRACE, "VFS Op: at %llu jiffies\n", get_jiffies_64());
1552         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
1553
1554         /* Some amount of caching on the client is allowed */
1555         rc = ll_statfs_internal(sb, &osfs,
1556                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1557                                 0);
1558         if (rc)
1559                 return rc;
1560
1561         statfs_unpack(sfs, &osfs);
1562
1563         /* We need to downshift for all 32-bit kernels, because we can't
1564          * tell if the kernel is being called via sys_statfs64() or not.
1565          * Stop before overflowing f_bsize - in which case it is better
1566          * to just risk EOVERFLOW if caller is using old sys_statfs(). */
1567         if (sizeof(long) < 8) {
1568                 while (osfs.os_blocks > ~0UL && sfs->f_bsize < 0x40000000) {
1569                         sfs->f_bsize <<= 1;
1570
1571                         osfs.os_blocks >>= 1;
1572                         osfs.os_bfree >>= 1;
1573                         osfs.os_bavail >>= 1;
1574                 }
1575         }
1576
1577         sfs->f_blocks = osfs.os_blocks;
1578         sfs->f_bfree = osfs.os_bfree;
1579         sfs->f_bavail = osfs.os_bavail;
1580         sfs->f_fsid = ll_s2sbi(sb)->ll_fsid;
1581         return 0;
1582 }
1583
1584 void ll_inode_size_lock(struct inode *inode)
1585 {
1586         struct ll_inode_info *lli;
1587
1588         LASSERT(!S_ISDIR(inode->i_mode));
1589
1590         lli = ll_i2info(inode);
1591         mutex_lock(&lli->lli_size_mutex);
1592 }
1593
1594 void ll_inode_size_unlock(struct inode *inode)
1595 {
1596         struct ll_inode_info *lli;
1597
1598         lli = ll_i2info(inode);
1599         mutex_unlock(&lli->lli_size_mutex);
1600 }
1601
1602 void ll_update_inode(struct inode *inode, struct lustre_md *md)
1603 {
1604         struct ll_inode_info *lli = ll_i2info(inode);
1605         struct mdt_body *body = md->body;
1606         struct lov_stripe_md *lsm = md->lsm;
1607         struct ll_sb_info *sbi = ll_i2sbi(inode);
1608
1609         LASSERT((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
1610         if (lsm != NULL) {
1611                 if (!lli->lli_has_smd &&
1612                     !(sbi->ll_flags & LL_SBI_LAYOUT_LOCK))
1613                         cl_file_inode_init(inode, md);
1614
1615                 lli->lli_maxbytes = lsm->lsm_maxbytes;
1616                 if (lli->lli_maxbytes > MAX_LFS_FILESIZE)
1617                         lli->lli_maxbytes = MAX_LFS_FILESIZE;
1618         }
1619
1620         if (sbi->ll_flags & LL_SBI_RMT_CLIENT) {
1621                 if (body->valid & OBD_MD_FLRMTPERM)
1622                         ll_update_remote_perm(inode, md->remote_perm);
1623         }
1624 #ifdef CONFIG_FS_POSIX_ACL
1625         else if (body->valid & OBD_MD_FLACL) {
1626                 spin_lock(&lli->lli_lock);
1627                 if (lli->lli_posix_acl)
1628                         posix_acl_release(lli->lli_posix_acl);
1629                 lli->lli_posix_acl = md->posix_acl;
1630                 spin_unlock(&lli->lli_lock);
1631         }
1632 #endif
1633         inode->i_ino = cl_fid_build_ino(&body->fid1,
1634                                         sbi->ll_flags & LL_SBI_32BIT_API);
1635         inode->i_generation = cl_fid_build_gen(&body->fid1);
1636
1637         if (body->valid & OBD_MD_FLATIME) {
1638                 if (body->atime > LTIME_S(inode->i_atime))
1639                         LTIME_S(inode->i_atime) = body->atime;
1640                 lli->lli_lvb.lvb_atime = body->atime;
1641         }
1642         if (body->valid & OBD_MD_FLMTIME) {
1643                 if (body->mtime > LTIME_S(inode->i_mtime)) {
1644                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
1645                                inode->i_ino, LTIME_S(inode->i_mtime),
1646                                body->mtime);
1647                         LTIME_S(inode->i_mtime) = body->mtime;
1648                 }
1649                 lli->lli_lvb.lvb_mtime = body->mtime;
1650         }
1651         if (body->valid & OBD_MD_FLCTIME) {
1652                 if (body->ctime > LTIME_S(inode->i_ctime))
1653                         LTIME_S(inode->i_ctime) = body->ctime;
1654                 lli->lli_lvb.lvb_ctime = body->ctime;
1655         }
1656         if (body->valid & OBD_MD_FLMODE)
1657                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
1658         if (body->valid & OBD_MD_FLTYPE)
1659                 inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
1660         LASSERT(inode->i_mode != 0);
1661         if (S_ISREG(inode->i_mode))
1662                 inode->i_blkbits = min(PTLRPC_MAX_BRW_BITS + 1,
1663                                        LL_MAX_BLKSIZE_BITS);
1664         else
1665                 inode->i_blkbits = inode->i_sb->s_blocksize_bits;
1666         if (body->valid & OBD_MD_FLUID)
1667                 inode->i_uid = make_kuid(&init_user_ns, body->uid);
1668         if (body->valid & OBD_MD_FLGID)
1669                 inode->i_gid = make_kgid(&init_user_ns, body->gid);
1670         if (body->valid & OBD_MD_FLFLAGS)
1671                 inode->i_flags = ll_ext_to_inode_flags(body->flags);
1672         if (body->valid & OBD_MD_FLNLINK)
1673                 set_nlink(inode, body->nlink);
1674         if (body->valid & OBD_MD_FLRDEV)
1675                 inode->i_rdev = old_decode_dev(body->rdev);
1676
1677         if (body->valid & OBD_MD_FLID) {
1678                 /* FID shouldn't be changed! */
1679                 if (fid_is_sane(&lli->lli_fid)) {
1680                         LASSERTF(lu_fid_eq(&lli->lli_fid, &body->fid1),
1681                                  "Trying to change FID "DFID
1682                                  " to the "DFID", inode %lu/%u(%p)\n",
1683                                  PFID(&lli->lli_fid), PFID(&body->fid1),
1684                                  inode->i_ino, inode->i_generation, inode);
1685                 } else
1686                         lli->lli_fid = body->fid1;
1687         }
1688
1689         LASSERT(fid_seq(&lli->lli_fid) != 0);
1690
1691         if (body->valid & OBD_MD_FLSIZE) {
1692                 if (exp_connect_som(ll_i2mdexp(inode)) &&
1693                     S_ISREG(inode->i_mode)) {
1694                         struct lustre_handle lockh;
1695                         ldlm_mode_t mode;
1696
1697                         /* As it is possible a blocking ast has been processed
1698                          * by this time, we need to check there is an UPDATE
1699                          * lock on the client and set LLIF_MDS_SIZE_LOCK holding
1700                          * it. */
1701                         mode = ll_take_md_lock(inode, MDS_INODELOCK_UPDATE,
1702                                                &lockh, LDLM_FL_CBPENDING,
1703                                                LCK_CR | LCK_CW |
1704                                                LCK_PR | LCK_PW);
1705                         if (mode) {
1706                                 if (lli->lli_flags & (LLIF_DONE_WRITING |
1707                                                       LLIF_EPOCH_PENDING |
1708                                                       LLIF_SOM_DIRTY)) {
1709                                         CERROR("ino %lu flags %u still has size authority! do not trust the size got from MDS\n",
1710                                                inode->i_ino, lli->lli_flags);
1711                                 } else {
1712                                         /* Use old size assignment to avoid
1713                                          * deadlock bz14138 & bz14326 */
1714                                         i_size_write(inode, body->size);
1715                                         spin_lock(&lli->lli_lock);
1716                                         lli->lli_flags |= LLIF_MDS_SIZE_LOCK;
1717                                         spin_unlock(&lli->lli_lock);
1718                                 }
1719                                 ldlm_lock_decref(&lockh, mode);
1720                         }
1721                 } else {
1722                         /* Use old size assignment to avoid
1723                          * deadlock bz14138 & bz14326 */
1724                         i_size_write(inode, body->size);
1725
1726                         CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
1727                                inode->i_ino, (unsigned long long)body->size);
1728                 }
1729
1730                 if (body->valid & OBD_MD_FLBLOCKS)
1731                         inode->i_blocks = body->blocks;
1732         }
1733
1734         if (body->valid & OBD_MD_FLMDSCAPA) {
1735                 LASSERT(md->mds_capa);
1736                 ll_add_capa(inode, md->mds_capa);
1737         }
1738         if (body->valid & OBD_MD_FLOSSCAPA) {
1739                 LASSERT(md->oss_capa);
1740                 ll_add_capa(inode, md->oss_capa);
1741         }
1742
1743         if (body->valid & OBD_MD_TSTATE) {
1744                 if (body->t_state & MS_RESTORE)
1745                         lli->lli_flags |= LLIF_FILE_RESTORING;
1746         }
1747 }
1748
1749 void ll_read_inode2(struct inode *inode, void *opaque)
1750 {
1751         struct lustre_md *md = opaque;
1752         struct ll_inode_info *lli = ll_i2info(inode);
1753
1754         CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
1755                PFID(&lli->lli_fid), inode);
1756
1757         LASSERT(!lli->lli_has_smd);
1758
1759         /* Core attributes from the MDS first.  This is a new inode, and
1760          * the VFS doesn't zero times in the core inode so we have to do
1761          * it ourselves.  They will be overwritten by either MDS or OST
1762          * attributes - we just need to make sure they aren't newer. */
1763         LTIME_S(inode->i_mtime) = 0;
1764         LTIME_S(inode->i_atime) = 0;
1765         LTIME_S(inode->i_ctime) = 0;
1766         inode->i_rdev = 0;
1767         ll_update_inode(inode, md);
1768
1769         /* OIDEBUG(inode); */
1770
1771         if (S_ISREG(inode->i_mode)) {
1772                 struct ll_sb_info *sbi = ll_i2sbi(inode);
1773
1774                 inode->i_op = &ll_file_inode_operations;
1775                 inode->i_fop = sbi->ll_fop;
1776                 inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
1777         } else if (S_ISDIR(inode->i_mode)) {
1778                 inode->i_op = &ll_dir_inode_operations;
1779                 inode->i_fop = &ll_dir_operations;
1780         } else if (S_ISLNK(inode->i_mode)) {
1781                 inode->i_op = &ll_fast_symlink_inode_operations;
1782         } else {
1783                 inode->i_op = &ll_special_inode_operations;
1784
1785                 init_special_inode(inode, inode->i_mode,
1786                                    inode->i_rdev);
1787         }
1788 }
1789
1790 void ll_delete_inode(struct inode *inode)
1791 {
1792         struct cl_inode_info *lli = cl_i2info(inode);
1793
1794         if (S_ISREG(inode->i_mode) && lli->lli_clob != NULL)
1795                 /* discard all dirty pages before truncating them, required by
1796                  * osc_extent implementation at LU-1030. */
1797                 cl_sync_file_range(inode, 0, OBD_OBJECT_EOF,
1798                                    CL_FSYNC_DISCARD, 1);
1799
1800         truncate_inode_pages_final(&inode->i_data);
1801
1802         /* Workaround for LU-118 */
1803         if (inode->i_data.nrpages) {
1804                 spin_lock_irq(&inode->i_data.tree_lock);
1805                 spin_unlock_irq(&inode->i_data.tree_lock);
1806                 LASSERTF(inode->i_data.nrpages == 0,
1807                          "inode=%lu/%u(%p) nrpages=%lu, see http://jira.whamcloud.com/browse/LU-118\n",
1808                          inode->i_ino, inode->i_generation, inode,
1809                          inode->i_data.nrpages);
1810         }
1811         /* Workaround end */
1812
1813         ll_clear_inode(inode);
1814         clear_inode(inode);
1815 }
1816
1817 int ll_iocontrol(struct inode *inode, struct file *file,
1818                  unsigned int cmd, unsigned long arg)
1819 {
1820         struct ll_sb_info *sbi = ll_i2sbi(inode);
1821         struct ptlrpc_request *req = NULL;
1822         int rc, flags = 0;
1823
1824         switch (cmd) {
1825         case FSFILT_IOC_GETFLAGS: {
1826                 struct mdt_body *body;
1827                 struct md_op_data *op_data;
1828
1829                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
1830                                              0, 0, LUSTRE_OPC_ANY,
1831                                              NULL);
1832                 if (IS_ERR(op_data))
1833                         return PTR_ERR(op_data);
1834
1835                 op_data->op_valid = OBD_MD_FLFLAGS;
1836                 rc = md_getattr(sbi->ll_md_exp, op_data, &req);
1837                 ll_finish_md_op_data(op_data);
1838                 if (rc) {
1839                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
1840                         return -abs(rc);
1841                 }
1842
1843                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1844
1845                 flags = body->flags;
1846
1847                 ptlrpc_req_finished(req);
1848
1849                 return put_user(flags, (int *)arg);
1850         }
1851         case FSFILT_IOC_SETFLAGS: {
1852                 struct lov_stripe_md *lsm;
1853                 struct obd_info oinfo = { { { 0 } } };
1854                 struct md_op_data *op_data;
1855
1856                 if (get_user(flags, (int *)arg))
1857                         return -EFAULT;
1858
1859                 op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
1860                                              LUSTRE_OPC_ANY, NULL);
1861                 if (IS_ERR(op_data))
1862                         return PTR_ERR(op_data);
1863
1864                 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = flags;
1865                 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
1866                 rc = md_setattr(sbi->ll_md_exp, op_data,
1867                                 NULL, 0, NULL, 0, &req, NULL);
1868                 ll_finish_md_op_data(op_data);
1869                 ptlrpc_req_finished(req);
1870                 if (rc)
1871                         return rc;
1872
1873                 inode->i_flags = ll_ext_to_inode_flags(flags);
1874
1875                 lsm = ccc_inode_lsm_get(inode);
1876                 if (!lsm_has_objects(lsm)) {
1877                         ccc_inode_lsm_put(inode, lsm);
1878                         return 0;
1879                 }
1880
1881                 OBDO_ALLOC(oinfo.oi_oa);
1882                 if (!oinfo.oi_oa) {
1883                         ccc_inode_lsm_put(inode, lsm);
1884                         return -ENOMEM;
1885                 }
1886                 oinfo.oi_md = lsm;
1887                 oinfo.oi_oa->o_oi = lsm->lsm_oi;
1888                 oinfo.oi_oa->o_flags = flags;
1889                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
1890                                        OBD_MD_FLGROUP;
1891                 oinfo.oi_capa = ll_mdscapa_get(inode);
1892                 obdo_set_parent_fid(oinfo.oi_oa, &ll_i2info(inode)->lli_fid);
1893                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
1894                 capa_put(oinfo.oi_capa);
1895                 OBDO_FREE(oinfo.oi_oa);
1896                 ccc_inode_lsm_put(inode, lsm);
1897
1898                 if (rc && rc != -EPERM && rc != -EACCES)
1899                         CERROR("osc_setattr_async fails: rc = %d\n", rc);
1900
1901                 return rc;
1902         }
1903         default:
1904                 return -ENOSYS;
1905         }
1906
1907         return 0;
1908 }
1909
1910 int ll_flush_ctx(struct inode *inode)
1911 {
1912         struct ll_sb_info  *sbi = ll_i2sbi(inode);
1913
1914         CDEBUG(D_SEC, "flush context for user %d\n",
1915                       from_kuid(&init_user_ns, current_uid()));
1916
1917         obd_set_info_async(NULL, sbi->ll_md_exp,
1918                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1919                            0, NULL, NULL);
1920         obd_set_info_async(NULL, sbi->ll_dt_exp,
1921                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
1922                            0, NULL, NULL);
1923         return 0;
1924 }
1925
1926 /* umount -f client means force down, don't save state */
1927 void ll_umount_begin(struct super_block *sb)
1928 {
1929         struct ll_sb_info *sbi = ll_s2sbi(sb);
1930         struct obd_device *obd;
1931         struct obd_ioctl_data *ioc_data;
1932
1933         CDEBUG(D_VFSTRACE, "VFS Op: superblock %p count %d active %d\n", sb,
1934                sb->s_count, atomic_read(&sb->s_active));
1935
1936         obd = class_exp2obd(sbi->ll_md_exp);
1937         if (obd == NULL) {
1938                 CERROR("Invalid MDC connection handle %#llx\n",
1939                        sbi->ll_md_exp->exp_handle.h_cookie);
1940                 return;
1941         }
1942         obd->obd_force = 1;
1943
1944         obd = class_exp2obd(sbi->ll_dt_exp);
1945         if (obd == NULL) {
1946                 CERROR("Invalid LOV connection handle %#llx\n",
1947                        sbi->ll_dt_exp->exp_handle.h_cookie);
1948                 return;
1949         }
1950         obd->obd_force = 1;
1951
1952         ioc_data = kzalloc(sizeof(*ioc_data), GFP_NOFS);
1953         if (ioc_data) {
1954                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
1955                               sizeof(*ioc_data), ioc_data, NULL);
1956
1957                 obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
1958                               sizeof(*ioc_data), ioc_data, NULL);
1959
1960                 OBD_FREE_PTR(ioc_data);
1961         }
1962
1963         /* Really, we'd like to wait until there are no requests outstanding,
1964          * and then continue.  For now, we just invalidate the requests,
1965          * schedule() and sleep one second if needed, and hope.
1966          */
1967         schedule();
1968 }
1969
1970 int ll_remount_fs(struct super_block *sb, int *flags, char *data)
1971 {
1972         struct ll_sb_info *sbi = ll_s2sbi(sb);
1973         char *profilenm = get_profile_name(sb);
1974         int err;
1975         __u32 read_only;
1976
1977         if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
1978                 read_only = *flags & MS_RDONLY;
1979                 err = obd_set_info_async(NULL, sbi->ll_md_exp,
1980                                          sizeof(KEY_READ_ONLY),
1981                                          KEY_READ_ONLY, sizeof(read_only),
1982                                          &read_only, NULL);
1983                 if (err) {
1984                         LCONSOLE_WARN("Failed to remount %s %s (%d)\n",
1985                                       profilenm, read_only ?
1986                                       "read-only" : "read-write", err);
1987                         return err;
1988                 }
1989
1990                 if (read_only)
1991                         sb->s_flags |= MS_RDONLY;
1992                 else
1993                         sb->s_flags &= ~MS_RDONLY;
1994
1995                 if (sbi->ll_flags & LL_SBI_VERBOSE)
1996                         LCONSOLE_WARN("Remounted %s %s\n", profilenm,
1997                                       read_only ?  "read-only" : "read-write");
1998         }
1999         return 0;
2000 }
2001
2002 int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req,
2003                   struct super_block *sb, struct lookup_intent *it)
2004 {
2005         struct ll_sb_info *sbi = NULL;
2006         struct lustre_md md;
2007         int rc;
2008
2009         LASSERT(*inode || sb);
2010         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
2011         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
2012                               sbi->ll_md_exp, &md);
2013         if (rc)
2014                 return rc;
2015
2016         if (*inode) {
2017                 ll_update_inode(*inode, &md);
2018         } else {
2019                 LASSERT(sb != NULL);
2020
2021                 /*
2022                  * At this point server returns to client's same fid as client
2023                  * generated for creating. So using ->fid1 is okay here.
2024                  */
2025                 LASSERT(fid_is_sane(&md.body->fid1));
2026
2027                 *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1,
2028                                              sbi->ll_flags & LL_SBI_32BIT_API),
2029                                  &md);
2030                 if (*inode == NULL || IS_ERR(*inode)) {
2031 #ifdef CONFIG_FS_POSIX_ACL
2032                         if (md.posix_acl) {
2033                                 posix_acl_release(md.posix_acl);
2034                                 md.posix_acl = NULL;
2035                         }
2036 #endif
2037                         rc = IS_ERR(*inode) ? PTR_ERR(*inode) : -ENOMEM;
2038                         *inode = NULL;
2039                         CERROR("new_inode -fatal: rc %d\n", rc);
2040                         goto out;
2041                 }
2042         }
2043
2044         /* Handling piggyback layout lock.
2045          * Layout lock can be piggybacked by getattr and open request.
2046          * The lsm can be applied to inode only if it comes with a layout lock
2047          * otherwise correct layout may be overwritten, for example:
2048          * 1. proc1: mdt returns a lsm but not granting layout
2049          * 2. layout was changed by another client
2050          * 3. proc2: refresh layout and layout lock granted
2051          * 4. proc1: to apply a stale layout */
2052         if (it != NULL && it->d.lustre.it_lock_mode != 0) {
2053                 struct lustre_handle lockh;
2054                 struct ldlm_lock *lock;
2055
2056                 lockh.cookie = it->d.lustre.it_lock_handle;
2057                 lock = ldlm_handle2lock(&lockh);
2058                 LASSERT(lock != NULL);
2059                 if (ldlm_has_layout(lock)) {
2060                         struct cl_object_conf conf;
2061
2062                         memset(&conf, 0, sizeof(conf));
2063                         conf.coc_opc = OBJECT_CONF_SET;
2064                         conf.coc_inode = *inode;
2065                         conf.coc_lock = lock;
2066                         conf.u.coc_md = &md;
2067                         (void)ll_layout_conf(*inode, &conf);
2068                 }
2069                 LDLM_LOCK_PUT(lock);
2070         }
2071
2072 out:
2073         if (md.lsm != NULL)
2074                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
2075         md_free_lustre_md(sbi->ll_md_exp, &md);
2076         return rc;
2077 }
2078
2079 int ll_obd_statfs(struct inode *inode, void *arg)
2080 {
2081         struct ll_sb_info *sbi = NULL;
2082         struct obd_export *exp;
2083         char *buf = NULL;
2084         struct obd_ioctl_data *data = NULL;
2085         __u32 type;
2086         __u32 flags;
2087         int len = 0, rc;
2088
2089         if (!inode) {
2090                 rc = -EINVAL;
2091                 goto out_statfs;
2092         }
2093
2094         sbi = ll_i2sbi(inode);
2095         if (!sbi) {
2096                 rc = -EINVAL;
2097                 goto out_statfs;
2098         }
2099
2100         rc = obd_ioctl_getdata(&buf, &len, arg);
2101         if (rc)
2102                 goto out_statfs;
2103
2104         data = (void *)buf;
2105         if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
2106             !data->ioc_pbuf1 || !data->ioc_pbuf2) {
2107                 rc = -EINVAL;
2108                 goto out_statfs;
2109         }
2110
2111         if (data->ioc_inllen1 != sizeof(__u32) ||
2112             data->ioc_inllen2 != sizeof(__u32) ||
2113             data->ioc_plen1 != sizeof(struct obd_statfs) ||
2114             data->ioc_plen2 != sizeof(struct obd_uuid)) {
2115                 rc = -EINVAL;
2116                 goto out_statfs;
2117         }
2118
2119         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
2120         if (type & LL_STATFS_LMV)
2121                 exp = sbi->ll_md_exp;
2122         else if (type & LL_STATFS_LOV)
2123                 exp = sbi->ll_dt_exp;
2124         else {
2125                 rc = -ENODEV;
2126                 goto out_statfs;
2127         }
2128
2129         flags = (type & LL_STATFS_NODELAY) ? OBD_STATFS_NODELAY : 0;
2130         rc = obd_iocontrol(IOC_OBD_STATFS, exp, len, buf, &flags);
2131         if (rc)
2132                 goto out_statfs;
2133 out_statfs:
2134         if (buf)
2135                 obd_ioctl_freedata(buf, len);
2136         return rc;
2137 }
2138
2139 int ll_process_config(struct lustre_cfg *lcfg)
2140 {
2141         char *ptr;
2142         void *sb;
2143         struct lprocfs_static_vars lvars;
2144         unsigned long x;
2145         int rc = 0;
2146
2147         lprocfs_llite_init_vars(&lvars);
2148
2149         /* The instance name contains the sb: lustre-client-aacfe000 */
2150         ptr = strrchr(lustre_cfg_string(lcfg, 0), '-');
2151         if (!ptr || !*(++ptr))
2152                 return -EINVAL;
2153         rc = kstrtoul(ptr, 16, &x);
2154         if (rc != 0)
2155                 return -EINVAL;
2156         sb = (void *)x;
2157         /* This better be a real Lustre superblock! */
2158         LASSERT(s2lsi((struct super_block *)sb)->lsi_lmd->lmd_magic == LMD_MAGIC);
2159
2160         /* Note we have not called client_common_fill_super yet, so
2161            proc fns must be able to handle that! */
2162         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
2163                                       lcfg, sb);
2164         if (rc > 0)
2165                 rc = 0;
2166         return rc;
2167 }
2168
2169 /* this function prepares md_op_data hint for passing ot down to MD stack. */
2170 struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data,
2171                                        struct inode *i1, struct inode *i2,
2172                                        const char *name, int namelen,
2173                                        int mode, __u32 opc, void *data)
2174 {
2175         LASSERT(i1 != NULL);
2176
2177         if (namelen > ll_i2sbi(i1)->ll_namelen)
2178                 return ERR_PTR(-ENAMETOOLONG);
2179
2180         if (op_data == NULL)
2181                 op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
2182
2183         if (op_data == NULL)
2184                 return ERR_PTR(-ENOMEM);
2185
2186         ll_i2gids(op_data->op_suppgids, i1, i2);
2187         op_data->op_fid1 = *ll_inode2fid(i1);
2188         op_data->op_capa1 = ll_mdscapa_get(i1);
2189
2190         if (i2) {
2191                 op_data->op_fid2 = *ll_inode2fid(i2);
2192                 op_data->op_capa2 = ll_mdscapa_get(i2);
2193         } else {
2194                 fid_zero(&op_data->op_fid2);
2195                 op_data->op_capa2 = NULL;
2196         }
2197
2198         op_data->op_name = name;
2199         op_data->op_namelen = namelen;
2200         op_data->op_mode = mode;
2201         op_data->op_mod_time = get_seconds();
2202         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2203         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2204         op_data->op_cap = cfs_curproc_cap_pack();
2205         op_data->op_bias = 0;
2206         op_data->op_cli_flags = 0;
2207         if ((opc == LUSTRE_OPC_CREATE) && (name != NULL) &&
2208              filename_is_volatile(name, namelen, NULL))
2209                 op_data->op_bias |= MDS_CREATE_VOLATILE;
2210         op_data->op_opc = opc;
2211         op_data->op_mds = 0;
2212         op_data->op_data = data;
2213
2214         /* If the file is being opened after mknod() (normally due to NFS)
2215          * try to use the default stripe data from parent directory for
2216          * allocating OST objects.  Try to pass the parent FID to MDS. */
2217         if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
2218             !ll_i2info(i2)->lli_has_smd) {
2219                 struct ll_inode_info *lli = ll_i2info(i2);
2220
2221                 spin_lock(&lli->lli_lock);
2222                 if (likely(!lli->lli_has_smd && !fid_is_zero(&lli->lli_pfid)))
2223                         op_data->op_fid1 = lli->lli_pfid;
2224                 spin_unlock(&lli->lli_lock);
2225                 /** We ignore parent's capability temporary. */
2226         }
2227
2228         /* When called by ll_setattr_raw, file is i1. */
2229         if (LLIF_DATA_MODIFIED & ll_i2info(i1)->lli_flags)
2230                 op_data->op_bias |= MDS_DATA_MODIFIED;
2231
2232         return op_data;
2233 }
2234
2235 void ll_finish_md_op_data(struct md_op_data *op_data)
2236 {
2237         capa_put(op_data->op_capa1);
2238         capa_put(op_data->op_capa2);
2239         OBD_FREE_PTR(op_data);
2240 }
2241
2242 int ll_show_options(struct seq_file *seq, struct dentry *dentry)
2243 {
2244         struct ll_sb_info *sbi;
2245
2246         LASSERT((seq != NULL) && (dentry != NULL));
2247         sbi = ll_s2sbi(dentry->d_sb);
2248
2249         if (sbi->ll_flags & LL_SBI_NOLCK)
2250                 seq_puts(seq, ",nolock");
2251
2252         if (sbi->ll_flags & LL_SBI_FLOCK)
2253                 seq_puts(seq, ",flock");
2254
2255         if (sbi->ll_flags & LL_SBI_LOCALFLOCK)
2256                 seq_puts(seq, ",localflock");
2257
2258         if (sbi->ll_flags & LL_SBI_USER_XATTR)
2259                 seq_puts(seq, ",user_xattr");
2260
2261         if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
2262                 seq_puts(seq, ",lazystatfs");
2263
2264         if (sbi->ll_flags & LL_SBI_USER_FID2PATH)
2265                 seq_puts(seq, ",user_fid2path");
2266
2267         return 0;
2268 }
2269
2270 /**
2271  * Get obd name by cmd, and copy out to user space
2272  */
2273 int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg)
2274 {
2275         struct ll_sb_info *sbi = ll_i2sbi(inode);
2276         struct obd_device *obd;
2277
2278         if (cmd == OBD_IOC_GETDTNAME)
2279                 obd = class_exp2obd(sbi->ll_dt_exp);
2280         else if (cmd == OBD_IOC_GETMDNAME)
2281                 obd = class_exp2obd(sbi->ll_md_exp);
2282         else
2283                 return -EINVAL;
2284
2285         if (!obd)
2286                 return -ENOENT;
2287
2288         if (copy_to_user((void *)arg, obd->obd_name,
2289                              strlen(obd->obd_name) + 1))
2290                 return -EFAULT;
2291
2292         return 0;
2293 }
2294
2295 /**
2296  * Get lustre file system name by \a sbi. If \a buf is provided(non-NULL), the
2297  * fsname will be returned in this buffer; otherwise, a static buffer will be
2298  * used to store the fsname and returned to caller.
2299  */
2300 char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
2301 {
2302         static char fsname_static[MTI_NAME_MAXLEN];
2303         struct lustre_sb_info *lsi = s2lsi(sb);
2304         char *ptr;
2305         int len;
2306
2307         if (buf == NULL) {
2308                 /* this means the caller wants to use static buffer
2309                  * and it doesn't care about race. Usually this is
2310                  * in error reporting path */
2311                 buf = fsname_static;
2312                 buflen = sizeof(fsname_static);
2313         }
2314
2315         len = strlen(lsi->lsi_lmd->lmd_profile);
2316         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
2317         if (ptr && (strcmp(ptr, "-client") == 0))
2318                 len -= 7;
2319
2320         if (unlikely(len >= buflen))
2321                 len = buflen - 1;
2322         strncpy(buf, lsi->lsi_lmd->lmd_profile, len);
2323         buf[len] = '\0';
2324
2325         return buf;
2326 }
2327
2328 void ll_dirty_page_discard_warn(struct page *page, int ioret)
2329 {
2330         char *buf, *path = NULL;
2331         struct dentry *dentry = NULL;
2332         struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
2333
2334         /* this can be called inside spin lock so use GFP_ATOMIC. */
2335         buf = (char *)__get_free_page(GFP_ATOMIC);
2336         if (buf != NULL) {
2337                 dentry = d_find_alias(page->mapping->host);
2338                 if (dentry != NULL)
2339                         path = dentry_path_raw(dentry, buf, PAGE_SIZE);
2340         }
2341
2342         CDEBUG(D_WARNING,
2343                "%s: dirty page discard: %s/fid: " DFID "/%s may get corrupted (rc %d)\n",
2344                ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
2345                s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
2346                PFID(&obj->cob_header.coh_lu.loh_fid),
2347                (path && !IS_ERR(path)) ? path : "", ioret);
2348
2349         if (dentry != NULL)
2350                 dput(dentry);
2351
2352         if (buf != NULL)
2353                 free_page((unsigned long)buf);
2354 }