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